阅读说明：本技术 换热固化分离可切换再生有机废水分离装置及其使用方法 (Heat exchange solidification separation switchable regeneration organic wastewater separation device and use method thereof ) 是由 韩东串 钱进 陈波 王浩 于 2021-09-02 设计创作，主要内容包括：本发明公开了换热固化分离可切换再生有机废水分离装置及其使用方法；包括两台并联的换热固化分离器；通过阀门及设定工艺控制参数进行系统控制,实现生产换热、固化分离、再生回收一系列生产过程,达到生产连续、稳定运行的目的。换热固化分离器,为了加强其对高分子粘稠物质捕捉和分离固化,在换热管外壁增加翅片,对液体内悬浮油脂进行捕捉和固化。在使用时,通过一台设备运行,一台设备处于备用或再生状态,保证系统正常生产稳定运行。本发明实现堵塞设备在线疏通,避免停机检修；通过对废水进行选择分离,回收废水中有价值的高分子有机物；通过对废水中高分子有机物,提前分离,提高系统稳定运行时间,盐分的纯净度和价值。(The invention discloses a device for separating organic wastewater by switching heat exchange, solidification and separation and regenerating and a using method thereof; comprises two heat exchange solidification separators which are connected in parallel; the system control is carried out through the valve and the set process control parameters, a series of production processes of production heat exchange, solidification separation and regeneration recovery are realized, and the aim of continuous and stable operation of production is fulfilled. The heat exchange solidification separator is used for capturing, separating and solidifying high-molecular viscous substances, and fins are additionally arranged on the outer wall of the heat exchange tube to capture and solidify suspended grease in liquid. When the system is used, one device is operated and is in a standby or regeneration state, so that the normal production and stable operation of the system are ensured. The invention realizes the on-line dredging of the blocking equipment and avoids the shutdown for maintenance; valuable high molecular organic matters in the wastewater are recovered by selective separation of the wastewater; by separating high molecular organic matters in the wastewater in advance, the stable operation time of the system and the purity and value of salt are improved.)

1. The heat exchange solidification separation can switch the regenerated organic wastewater separation device; the device is characterized by comprising two heat exchange solidification separators which are connected in parallel;

each heat exchange solidification separation device comprises a pipe box (18A), and a front seal head (16A) and a rear seal head (17A) which are arranged at the front end and the rear end of the pipe box (18A) to form a device main body;

each front seal head (16A) comprises a front seal head body, a front seal head heat insulation layer, a cooling water and regenerated steam inlet (1A), a front seal head exhaust port (2A) and a front seal head exhaust port (14A);

each rear end enclosure (17A) comprises a rear end enclosure body, a rear end enclosure heat insulation layer, a cooling water heat exchange rear outlet (7A), a rear end enclosure exhaust port (6A) and a rear end enclosure exhaust port (8A);

each tube box (18A) comprises a plurality of heat exchange tubes, a large flange plate, a shell, a heating jacket, a tube box heat-insulating layer, a front tube box expansion joint (19A), a rear tube box expansion joint (20A), a shell side wastewater inlet (3A), a shell side jacket steam inlet (4A), a shell side exhaust port (5A), a shell side wastewater cooling rear outlet (9A), three jacket steam condensate discharge ports (10A, 11A and 12A) and a shell side exhaust port (13A) which are arranged in parallel;

each heat exchange tube comprises a water distribution section light pipe (24A) close to the front end of the tube box, a catching and adhering solidified section (25A) corresponding to the middle part of the tube box and a water collecting and draining section light pipe (26A) close to the rear end of the tube box;

the heat exchange tubes are fixed through heat exchange tube box plates arranged in the tube box (18A);

the heat exchange tube box plate is provided with a fixing hole (23A) corresponding to each heat exchange tube and is fixed on the tube box (18A) through a fixing bolt (22A);

a plurality of catching adhesive fins (27A) are arranged on the outer wall of each catching adhesive curing pipe section (25A);

each front pipe box expansion joint (19A) and each rear pipe box expansion joint (20A) have water collecting and distributing functions.

2. The heat exchange solidification separation switchable regeneration organic wastewater separation device according to claim 1, wherein the front head (16A) and the rear head (17A) of each heat exchange solidification separation apparatus are connected with the corresponding pipe box through bolts.

3. The apparatus for separating organic waste water switchable between heat exchange solidification and separation regeneration according to claim 1, wherein each of the channel boxes (18A) is provided with an equipment support (21A).

4. The heat exchange solidification separation switchable regeneration organic wastewater separation device according to claim 1, wherein two parallel heat exchange solidification separators are connected through a pipeline, a valve and a device;

the valve control, the temperature display and the pressure difference display of each heat exchange solidification separator are integrated into a corresponding PLC control module, and the two heat exchange solidification separators are prompted to be switched and regenerated through presetting a temperature alarm value and a pressure difference alarm value in a program of the corresponding PLC control module.

5. The use method of the heat exchange solidification separation switchable regeneration organic wastewater separation device according to claim 4, is characterized by comprising a wastewater flow path, and specifically comprises the following steps:

waste water from the front-end process is divided into two paths after passing through a main water pipe control valve (1);

one path of wastewater enters the shell pass of the heat exchange solidification separator through a shell pass wastewater inlet (3A) of the heat exchange solidification separator, is discharged out of equipment through a shell pass wastewater cooling outlet (9A) of the heat exchange solidification separator after heat exchange, enters a discharge header pipe and is discharged out through a wastewater outlet header pipe control valve (16);

another way is through another shell side waste water import (3A) of heat transfer solidification separator gets into the shell side of heat transfer solidification separator, the heat transfer back, through another export (9A) discharge apparatus behind the shell side waste water cooling of heat transfer solidification separator can go into the discharge house steward, the warp waste water outlet house steward control valve (16) is discharged.

6. The use method of the heat exchange solidification separation switchable regeneration organic wastewater separation device according to claim 4, is characterized by comprising a cooling water flow path, and specifically comprises the following steps:

dividing water from a cooling water main pipe into two paths, wherein one path of water enters a corresponding pipe pass through the cooling water and regeneration steam inlet (1A) of the front end enclosure (16A) of one heat exchange solidification separator, and is discharged from the cooling water outlet (7A) of the rear end enclosure (17A) of the heat exchange solidification separator after heat exchange, and then is converged into a cooling water outlet main pipe for discharging;

and the other path enters a corresponding tube pass through the cooling water and regenerated steam inlet (1A) of the front end enclosure (16A) of the other heat exchange solidification separator, and is discharged through the cooling water heat exchange rear outlet (7A) of the rear end enclosure (17A) of the other heat exchange solidification separator and converged into the cooling water outlet header pipe for discharging after heat exchange.

7. The use method of the heat exchange solidification separation switchable regeneration organic wastewater separation device according to claim 4, further comprising a steam and condensed water flow path, specifically as follows:

the steam from the steam main pipe is divided into six paths;

wherein, after the first path heats a shell-side medium through the cooling water and the regenerated steam inlet (1A) of the front seal head (16A) of the heat exchange solidification separator, condensate is discharged through a corresponding front seal head discharge port (14A), a corresponding rear seal head discharge port (8A) and a pipe-side condensate discharge valve;

the second path of condensed water is discharged through three corresponding jacket steam condensate discharging ports (10A, 11A and 12A) after the shell of the corresponding tube box (18A) is heated through an inlet jacket of a shell-side jacket steam adding port (4A) of the heat exchange solidification separator;

the third path enters a shell side through a shell side steam hot boiling steam adding valve (5) of one heat exchange curing separator, and after the shell side is heated, condensate is discharged through high molecular substance discharge ports (12 and 14) generated during regeneration of the heat exchange curing separator;

after the fourth path heats a shell-side medium through the cooling water and the regenerated steam inlet (1A) of the front seal head (16A) of the other heat exchange solidification separator, condensate is discharged through a corresponding front seal head discharge port (14A), a corresponding rear seal head discharge port (8A) and a pipe-side condensate discharge valve;

the fifth path is an inlet jacket of the shell-side jacket steam inlet (4A) of the other heat exchange solidification separator, after the shell of the corresponding tube box (18A) is heated, condensed water is discharged through three corresponding jacket steam condensate outlets (10A, 11A and 12A);

and the sixth path enters a shell side through a shell side steam hot boiling steam adding valve (22) of the other heat exchange solidification separator, and after the shell side is heated, condensate is discharged through high molecular substance discharge ports (26 and 21) generated during regeneration of the heat exchange solidification separator.

8. The use method of the heat exchange solidification separation switchable regeneration organic wastewater separation device according to claim 4, characterized in that when the solidified substances in the shell pass of the heat exchange solidification separator increase to affect heat exchange and wastewater passage, a regeneration process is performed, specifically as follows:

closing a cooling water and regenerated steam inlet (1A) and a cooling water heat exchange outlet (7A), stopping cooling water feeding, opening a front seal head discharge port (14A) and a rear seal head discharge port (8A), and discharging accumulated water;

closing the shell side wastewater inlet (3A), opening the shell side drain port (13A), and draining shell side accumulated liquid;

and opening a shell side jacket steam inlet (4A), heating the shell side and the pipe box (18A) to liquefy the high molecular organic matters solidified in the shell side, and discharging and recovering the high molecular organic matters from a shell side discharge port (13A) to recover the production capacity.

9. The use method of the heat exchange solidification separation switchable regeneration organic wastewater separation device according to claim 4 comprises the following steps:

step 1, checking that each heat exchange solidification separator and corresponding valves, pipelines, instruments and control systems are intact and in a standby state;

step 2, starting a wastewater incoming main pipe control valve (1) from a front-end process, starting feeding, opening an inlet control valve (2) of the heat exchange solidification separator, starting feeding to the heat exchange solidification separator, opening a wastewater heat exchange rear outlet valve (11) of the heat exchange solidification separator, and opening a wastewater outlet main pipe control valve (16);

step 3, gradually opening a cooling water inlet valve (4) of the heat exchange solidification separator, and opening a cooling water heat exchange rear outlet valve (8) of the heat exchange solidification separator to realize heat exchange and temperature reduction of the waste water in the equipment;

step 4, controlling the temperature by controlling a cooling water inlet valve (4) or a cooling water heat exchange outlet valve (8);

step 5, feeding back a pressure difference value between a wastewater inlet pressure display (PI-2) of the heat exchange solidification separator and a wastewater outlet pressure display (PI-3) of the heat exchange solidification separator and a wastewater shell side outlet side temperature display (TI-4) of the heat exchange solidification separator to a corresponding PLC module by judging, and automatically alarming when the pressure difference value or the value of the wastewater shell side outlet side temperature display (TI-4) reaches an alarm limit; after receiving the alarm, carrying out system switching in time;

step 6, when the temperature of the outlet side of the wastewater shell side displays a display value of (TI-4), or the pressure difference value between the wastewater inlet pressure display (PI-2) and the wastewater outlet pressure display (PI-3) gives an alarm, switching is carried out;

step 7, when the solidified substances in the shell pass of the heat exchange solidification separator are increased to influence heat exchange and waste water passing, carrying out a regeneration process, and starting another heat exchange solidification separator;

the step of starting another heat exchange solidification separator is as follows:

step 8, opening an inlet control valve (17) of another heat exchange solidification separator, starting to feed materials to the heat exchange solidification separator, and opening a waste water heat exchange rear outlet valve (29) of the heat exchange solidification separator;

step 9, gradually opening a cooling water inlet valve (18) of the heat exchange solidification separator, and opening a cooling water heat exchange rear outlet valve (30) of the heat exchange solidification separator to realize heat exchange and temperature reduction of the waste water in the equipment;

step 10, controlling the temperature by controlling a cooling water inlet valve (18) or a cooling water heat exchange outlet valve (30);

step 11, feeding back a pressure difference value between a wastewater inlet pressure display (PI-6) of the heat exchange solidification separator and a wastewater outlet pressure display (PI-7) of the heat exchange solidification separator and a temperature display (TI-8) of a wastewater shell side outlet side of the heat exchange solidification separator to a corresponding PLC module through judgment, and automatically alarming when the pressure difference value or the temperature display (TI-8) of the wastewater shell side outlet side reaches an alarm limit; after receiving the alarm, carrying out system switching in time;

step 12, when the temperature of the outlet side of the wastewater shell side displays the display value of (TI-8), or the differential pressure value between the wastewater inlet pressure display (PI-6) and the wastewater outlet pressure display (PI-7) gives an alarm, switching is carried out;

the regeneration procedure was carried out as follows:

step 13, closing a waste water heat exchange rear outlet valve (11) and a waste water inlet control valve (2) of the heat exchange solidification separator;

step 14, closing a cooling water inlet valve (4) and a cooling water outlet valve (8) after heat exchange of the heat exchange solidification separator;

step 15, opening a seal head condensed water emptying valve (15) and a tube pass condensed water emptying valve (9) of the heat exchange solidification separator, and draining accumulated water on a tube pass; opening steam condensate water discharge valves (12, 13) of the jacket to drain accumulated water in the jacket;

step 16, opening high molecular substance discharge and outlet valves (12, 14) generated during regeneration of the heat exchange solidification separator, and discharging liquid wastewater of equipment;

step 17, slowly opening a regenerative heating steam control valve (3) and a shell-side jacket steam boiling adding valve (6) of the heat exchange solidification separator, adding steam to a tube side and a jacket of the device, heating and regenerating, and simultaneously opening an end enclosure, a tube side condensate water emptying valve and a jacket steam condensate water discharge valve to discharge condensate water;

18, in the heating process, gradually melting substances attached to the inner wall of the heat exchange solidification separator, the wall of the heat exchange tube and the capturing fins, and discharging high molecular substances generated in the regeneration of the heat exchange solidification separator out of the outlet valves (12 and 14) for recycling;

step 19, after the regeneration is completed, adjusting the opening state to enable the heat exchange solidification separator which completes the regeneration to be in a standby state, switching to be used after the resistance of another heat exchange solidification separator which is in operation is increased or the outlet temperature is increased to an alarm value, and switching another heat exchange solidification separator to enter a regeneration process;

and 20, circularly cutting two heat exchange solidification separators to ensure the normal production and stable operation of the system.

10. The use method of the switchable regenerative organic wastewater separation device of claim 4, wherein any heat exchange solidification separator is steamed at a waste liquid inlet by adding steam through a shell-side steam hot-boiling steam adding valve (5) after no substance is discharged in the regeneration process; and the cooking liquor is discharged from outlet valves (12, 14) for discharging high molecular substances generated during regeneration, returns to a water inlet area of the multi-effect evaporation, and judges whether the system regeneration is finished or not according to the water boiling water outlet effect.

Technical Field

The invention relates to the technical field of wastewater treatment, in particular to a device for separating switchable regenerated organic wastewater through heat exchange, solidification and separation and a using method thereof.

Background

In the prior art, the high-salt and high-concentration organic wastewater is mostly subjected to a multi-effect evaporation process to separate pollutants such as COD, NH3-N, salt and the like in the wastewater. In order to realize the separation of pollutant components, the process usually needs heating, heat exchange, cooling and other operations, and is mainly realized by partition wall heat exchange in the aspects of temperature control and heat recovery.

However, in practical application, because the wastewater contains a large amount of high molecular organic matters, and the carbon chains and the molecular weights are all different and unequal, the temperature range of the freezing point is wider, the heat exchange equipment which is easy to cause multi-effect evaporation is in the process production process, along with the reduction of the temperature of the mixed liquid, part of high molecular substances in the mixed liquid begins to condense, so that the liquid can become sticky, solidified and caked, and the liquid is adhered to the inner walls of the equipment, the pipeline, the valve and the like, so that the equipment, the pipeline and the valve are blocked, the system cannot normally operate, is forced to stop for dredging and overhauling, the overhauling treatment is improper, secondary pollution is also generated, and meanwhile, the normal production treatment of the system is influenced, the operation of a main production device is influenced, the quality of separated salt is influenced, and the recycling value of the separated salt is reduced.

Therefore, how to solve the problem is that part of the high molecular substances in the mixed liquid begins to coagulate, so that the liquid becomes sticky, solidified and caked, and adheres to the inner walls of equipment, pipelines, valves and the like, so that the blockage of the equipment, the pipelines and the valves becomes a technical problem which needs to be solved urgently by the technical personnel in the field.

Disclosure of Invention

In view of the defects in the prior art, the invention provides the device for separating the organic wastewater, which can be switched between heat exchange, solidification and separation and can regenerate, and the use method thereof, so that the aim of realizing online dredging of the blocking equipment is fulfilled, and the problems of shutdown and maintenance and influence on the treatment capacity of the system are avoided; valuable high molecular organic matters in the wastewater are recovered by selective separation of the wastewater; by separating high molecular organic matters in the wastewater in advance, the stable operation time of the system is improved, the purity of salt is improved, and the recycling value of the salt is improved.

In order to achieve the aim, the invention discloses a device for separating the switchable regenerated organic wastewater through heat exchange, solidification and separation; comprises two heat exchange solidification separators which are connected in parallel;

each heat exchange solidification separation device comprises a pipe box, a front end socket and a rear end socket, wherein the front end socket and the rear end socket are arranged at the front end and the rear end of the pipe box to form a device main body;

each front seal head comprises a front seal head body, a front seal head heat-insulating layer, a cooling water and regenerated steam inlet, a front seal head exhaust port and a front seal head exhaust port;

each rear end enclosure comprises a rear end enclosure body, a rear end enclosure heat insulation layer, a cooling water heat exchange rear outlet, a rear end enclosure exhaust port and a rear end enclosure exhaust port;

each tube box comprises a plurality of heat exchange tubes, a large flange plate, a shell, a heating jacket, a tube box heat-insulating layer, a front tube box expansion joint, a rear tube box expansion joint, a shell side wastewater inlet, a shell side jacket steam inlet, a shell side exhaust port, a shell side wastewater cooling rear outlet, three jacket steam condensate outlets and a shell side exhaust port which are arranged in parallel;

each heat exchange tube comprises a water distribution section light pipe close to the front end of the tube box, a capturing adhesion curing tube section corresponding to the middle part of the tube box and a water collecting drainage section light pipe close to the rear end of the tube box;

the plurality of heat exchange tubes are fixed through heat exchange tube box plates arranged in the tube box;

the heat exchange tube box plate is provided with a fixing hole corresponding to each heat exchange tube and is fixed on the tube box through a fixing bolt;

a plurality of catching adhesive fins are arranged on the outer wall of each catching adhesive curing pipe section;

each front pipe box expansion joint and each rear pipe box expansion joint have water collecting and distributing functions.

Preferably, the front seal head and the rear seal head of each heat exchange solidification separation device are connected with the corresponding pipe box through bolts.

Preferably, each of the tube boxes is provided with an equipment support.

Preferably, the two heat exchange solidification separators connected in parallel are connected through a pipeline, a valve and equipment;

the valve control, the temperature display and the pressure difference display of each heat exchange solidification separator are integrated into a corresponding PLC control module, and the two heat exchange solidification separators are prompted to be switched and regenerated through presetting a temperature alarm value and a pressure difference alarm value in a program of the corresponding PLC control module.

More preferably, the method comprises a wastewater flow path, which is as follows:

waste water from the front-end process is divided into two paths after passing through a main water pipe control valve;

one path of wastewater enters the shell pass of the heat exchange solidification separator through a shell pass wastewater inlet of the heat exchange solidification separator, is discharged out of equipment through an outlet after the shell pass wastewater of the heat exchange solidification separator is cooled after heat exchange, enters a discharge header pipe and is discharged through a wastewater outlet header pipe control valve;

another way gets into through another heat transfer solidification separator's shell side waste water import the shell side of heat transfer solidification separator, the heat transfer back, through another export discharge apparatus behind the shell side waste water cooling of heat transfer solidification separator can go into the discharge house steward, the warp waste water export house steward control valve is discharged.

More preferably, the method comprises a cooling water flow path, which is as follows:

dividing water from a cooling water main pipe into two paths, wherein one path of water enters a corresponding pipe pass through the cooling water and regenerated steam inlet of the front end enclosure of one heat exchange solidification separator, is subjected to heat exchange, is discharged from the cooling water outlet of the rear end enclosure of the heat exchange solidification separator after heat exchange, and then is converged into a cooling water outlet main pipe for discharging;

and the other path enters a corresponding tube pass through the cooling water and regenerated steam inlet of the front end socket of the other heat exchange solidification separator, and is discharged from the cooling water outlet of the rear end socket of the other heat exchange solidification separator after heat exchange, and then flows into the cooling water outlet header pipe for discharge.

More preferably, the method further comprises a steam and condensed water flow path, which is as follows:

the steam from the steam main pipe is divided into six paths;

wherein, after the first path heats the shell-side medium through the cooling water and the regenerated steam inlet of the front end enclosure of the heat exchange solidification separator, condensate is discharged through a corresponding front end enclosure discharge port, a corresponding rear end enclosure discharge port and a pipe-side condensate discharge valve;

the second path enters a jacket through a shell-side jacket steam adding port of the heat exchange solidification separator, and condensed water is discharged through three corresponding jacket steam condensate discharging ports after the shell of the corresponding tube box is heated;

the third path enters a shell side through a shell side steam hot boiling steam adding valve of one heat exchange curing separator, and after the shell side is heated, condensate is discharged through a high molecular substance discharge port generated when the heat exchange curing separator regenerates;

after the fourth path heats a shell-side medium through the cooling water and the regenerated steam inlet of the front end enclosure of the other heat exchange solidification separator, condensate is discharged through a corresponding front end enclosure discharge port, a corresponding rear end enclosure discharge port and a pipe-side condensate discharge valve;

a fifth path of condensed water is discharged through three corresponding jacket steam condensate outlets after the shell of the corresponding tube box is heated by an inlet jacket of the shell-side jacket steam inlet of the other heat exchange solidification separator;

and the sixth path enters a shell side through a shell side steam hot boiling steam adding valve of the other heat exchange solidification separator, and after the shell side is heated, condensate is discharged through a high molecular substance discharge port generated during regeneration of the heat exchange solidification separator.

More preferably, when the solidified substances in the shell pass of the heat exchange solidification separator increase to influence heat exchange and waste water passing, the regeneration process is carried out, and the specific steps are as follows:

closing the cooling water and regenerated steam inlet and the cooling water heat exchange outlet, stopping cooling water feeding, and opening the front seal head discharge port and the rear seal head discharge port to discharge accumulated water;

closing the shell side waste water inlet, opening the shell side drain port and draining shell side accumulated liquid;

and opening a shell side jacket steam inlet, heating the shell side and the pipe box to liquefy the high molecular organic matters solidified in the shell side, and discharging and recovering the high molecular organic matters from a shell side discharge port to recover the production capacity.

The invention also provides a use method of the device for separating the switchable regenerated organic wastewater through heat exchange, solidification and separation, which comprises the following steps:

step 1, checking that each heat exchange solidification separator and corresponding valves, pipelines, instruments and control systems are intact and in a standby state;

step 2, starting a wastewater incoming main pipe control valve from a front-end process, starting feeding, starting an inlet control valve of one heat exchange solidification separator, starting feeding to the heat exchange solidification separator, starting a wastewater heat exchange rear outlet valve of the heat exchange solidification separator, and opening a wastewater outlet main pipe control valve;

step 3, gradually opening a cooling water inlet valve of the heat exchange solidification separator, and opening a cooling water heat exchange rear outlet valve of the heat exchange solidification separator to realize heat exchange and temperature reduction of the wastewater in the equipment;

step 4, controlling the temperature by controlling a cooling water inlet valve or a cooling water heat exchange rear outlet valve;

step 5, feeding back to a corresponding PLC module by judging a pressure difference value between a wastewater inlet pressure display of the heat exchange solidification separator and a wastewater outlet pressure display of the heat exchange solidification separator and a temperature display of a wastewater shell pass outlet side of the heat exchange solidification separator, and automatically alarming when the pressure difference value or the temperature display value of the wastewater shell pass outlet side reaches an alarm limit; after receiving the alarm, carrying out system switching in time;

step 6, when the displayed value of the temperature at the outlet side of the wastewater shell side or the differential pressure value between the wastewater inlet pressure display and the wastewater outlet pressure display gives an alarm, switching is carried out;

step 7, when the solidified substances in the shell pass of the heat exchange solidification separator are increased to influence heat exchange and waste water passing, carrying out a regeneration process, and starting another heat exchange solidification separator;

the step of starting another heat exchange solidification separator is as follows:

step 8, opening an inlet control valve of the other heat exchange solidification separator, starting to feed materials to the heat exchange solidification separator, and opening a waste water heat exchange rear outlet valve of the heat exchange solidification separator;

step 9, gradually opening a cooling water inlet valve of the heat exchange solidification separator, and opening a cooling water heat exchange rear outlet valve of the heat exchange solidification separator to realize heat exchange and temperature reduction of the wastewater in the equipment;

step 10, controlling the temperature by controlling a cooling water inlet valve or a cooling water heat exchange rear outlet valve;

step 11, feeding back a pressure difference value between a wastewater inlet pressure display of the heat exchange solidification separator and a wastewater outlet pressure display of the heat exchange solidification separator and a temperature display of a wastewater shell pass outlet side of the heat exchange solidification separator to a corresponding PLC module by judging, and setting an alarm value, and automatically alarming when the pressure difference value or the temperature display value of the wastewater shell pass outlet side reaches an alarm limit; after receiving the alarm, carrying out system switching in time;

step 12, when the displayed value of the temperature at the outlet side of the wastewater shell side or the pressure difference value between the wastewater inlet pressure display and the wastewater outlet pressure display gives an alarm, switching is carried out;

the regeneration procedure was carried out as follows:

step 13, closing a waste water heat exchange rear outlet valve and a waste water inlet control valve of the heat exchange solidification separator;

step 14, closing a cooling water inlet valve and a cooling water outlet valve after heat exchange of the heat exchange solidification separator;

step 15, opening a seal head condensed water emptying valve and a tube pass condensed water emptying valve of the heat exchange solidification separator, and draining accumulated water in a tube pass; opening a jacket steam condensate water discharge valve to drain the accumulated water in the jacket;

step 16, opening a high molecular substance outlet valve generated during regeneration of the heat exchange solidification separator, and draining liquid wastewater of equipment;

step 17, slowly opening a regenerative heating steam control valve and a shell-side jacket steam boiling adding valve of the heat exchange solidification separator, adding steam to a tube side and a jacket of the device, heating and regenerating, and simultaneously opening an end enclosure, a tube side condensate water emptying valve and a jacket steam condensate water discharge valve to discharge condensate water;

18, in the heating process, gradually melting substances attached to the inner wall of the heat exchange solidification separator, the wall of the heat exchange tube and the capturing fins, and discharging and recycling high molecular substances generated in the regeneration process of the heat exchange solidification separator out of an outlet valve;

step 19, after the regeneration is completed, adjusting the opening state to enable the heat exchange solidification separator which completes the regeneration to be in a standby state, switching to be used after the resistance of another heat exchange solidification separator which is in operation is increased or the outlet temperature is increased to an alarm value, and switching another heat exchange solidification separator to enter a regeneration process;

and 20, circularly cutting two heat exchange solidification separators to ensure the normal production and stable operation of the system.

After any heat exchange solidification separator enters a regeneration process and no matter is discharged, steam is added into a waste liquid inlet through a shell-side steam hot boiling steam adding valve for boiling; and the cooking liquor is discharged from a discharge port valve for generating high molecular substances during regeneration, returns to a water inlet area for multi-effect evaporation, and judges whether the system regeneration is finished or not according to the water boiling water outlet effect.

The invention has the beneficial effects that:

the heat exchange equipment is improved to have the effect of capturing solidification separation.

By introducing the concept of solidification and separation, the two devices are switched to operate in parallel, and the long-period stable operation of the system is ensured.

In the invention, organic matters with certain values are recovered through solidification separation and heating recovery.

According to the invention, through solidification separation, impurities of salt are removed in advance, and the purity of recovered salt is improved.

The conception, the specific structure and the technical effects of the present invention will be further described with reference to the accompanying drawings to fully understand the objects, the features and the effects of the present invention.

Drawings

Fig. 1 shows a schematic structural diagram of an embodiment of the present invention.

Fig. 2 is a schematic structural view showing a tube box plate of the heat exchange tube in an embodiment of the present invention.

Fig. 3 shows a schematic structural diagram of a heat exchange tube in an embodiment of the invention.

Fig. 4 is a schematic cross-sectional view of a heat exchange tube according to an embodiment of the present invention.

FIG. 5 shows a flow chart of an organic wastewater separation process according to an embodiment of the present invention.

Detailed Description

Examples

As shown in fig. 1 to 4, a heat exchange solidification separation switchable regenerative organic wastewater separation apparatus of the present invention; comprises two heat exchange solidification separators which are connected in parallel;

each heat exchange solidification separation device comprises a pipe box 18A, and a front seal head 16A and a rear seal head 17A which are arranged at the front end and the rear end of the pipe box 18A to form a device main body;

each front seal head 16A comprises a front seal head body, a front seal head heat-insulating layer, a cooling water and regenerated steam inlet 1A, a front seal head exhaust port 2A and a front seal head exhaust port 14A;

each rear end enclosure 17A comprises a rear end enclosure body, a rear end enclosure heat insulation layer, a cooling water heat exchange rear outlet 7A, a rear end enclosure exhaust port 6A and a rear end enclosure exhaust port 8A;

each tube box 18A comprises a plurality of heat exchange tubes arranged in parallel, a large flange disc, a shell, a heating jacket, a tube box heat-insulating layer, a front tube box expansion joint 19A, a rear tube box expansion joint 20A, a shell-side wastewater inlet 3A, a shell-side jacket steam inlet 4A, a shell-side exhaust port 5A, a shell-side wastewater cooling rear outlet 9A, three jacket steam condensate outlets 10A, 11A and 12A and a shell-side exhaust port 13A;

each heat exchange tube comprises a water distribution section light pipe 24A close to the front end of the tube box, a capturing adhesion curing tube section 25A corresponding to the middle part of the tube box and a water collecting drainage section light pipe 26A close to the rear end of the tube box;

a plurality of heat exchange tubes are fixed through heat exchange tube box plates arranged in the tube box 18A;

the heat exchange tube box plate is provided with a fixing hole 23A corresponding to each heat exchange tube and is fixed on the tube box 18A through a fixing bolt 22A;

the outer wall of each catching adhesion curing pipe section 25A is provided with a plurality of catching adhesion fins 27A;

each front header expansion joint 19A and each rear header expansion joint 20A have water collecting and distributing functions.

The principle of the invention is as follows:

the heat exchange solidification separator mainly has the following functions: cooling, solidifying, separating, heating and regenerating.

The cooling function is that the cooling water is introduced by the cooling water and the regenerated steam inlet 1A, the high-temperature waste water introduced by the shell pass waste water inlet 3 is subjected to the dividing wall type heat exchange, and then the heat medium is cooled;

the solidification separation effect means that in the process that high-temperature wastewater is introduced into the shell side wastewater inlet 3A and is cooled in the heat exchanger, along with the reduction of the temperature, part of high molecular substances in the wastewater begin to solidify and are adhered to the tube wall of the heat exchange tube and each catching adhesive fin 27A, so that the effect of separation from a liquid phase is realized.

In certain embodiments, the front head 16A and the rear head 17A of each heat exchange solidification separation device are connected with the corresponding pipe box through bolts.

In some embodiments, each of the tube boxes 18A is provided with an equipment support 21A.

In some embodiments, two parallel heat exchange solidification separators are connected through a pipeline, a valve and equipment;

the valve control, the temperature display and the pressure difference display of each heat exchange solidification separator are integrated into the corresponding PLC control module, and the temperature alarm value and the pressure difference alarm value are preset in the program of the corresponding PLC control module to prompt that the two heat exchange solidification separators need to be switched and regenerated.

In certain embodiments, the wastewater flow scheme is as follows:

waste water from the front-end process is divided into two paths after passing through a main water pipe control valve 1;

one path enters the shell side of the heat exchange solidification separator through a shell side wastewater inlet 3A of the heat exchange solidification separator, is discharged out of the equipment through an outlet 9A after being cooled by the shell side wastewater of the heat exchange solidification separator after heat exchange, enters a discharge header pipe and is discharged out through a wastewater outlet header pipe control valve 16;

and the other path of wastewater enters the shell pass of the heat exchange solidification separator through a shell pass wastewater inlet 3A of the other heat exchange solidification separator, is discharged out of the equipment through an outlet 9A after being cooled by shell pass wastewater of the other heat exchange solidification separator after heat exchange, enters a discharge header pipe and is discharged out through a wastewater outlet header pipe control valve 16.

In some embodiments, the method further comprises a cooling water flow path, specifically as follows:

dividing water from a cooling water main pipe into two paths, wherein one path of water enters a corresponding pipe pass after passing through a cooling water inlet 1A and a regenerated steam inlet 16A of a front end enclosure 16A of a heat exchange solidification separator, and after heat exchange, the water is discharged from a cooling water outlet 7A of a rear end enclosure 17A of the heat exchange solidification separator after heat exchange, and then the water is converged into a cooling water outlet main pipe for discharge;

and the other path of cooling water enters a corresponding tube pass through a cooling water inlet 1A of a front end enclosure 16A of the other heat exchange solidification separator, is subjected to heat exchange, is discharged from a cooling water outlet 7A of a rear end enclosure 17A of the other heat exchange solidification separator after heat exchange, and then is converged into a cooling water outlet header pipe for discharge.

In some embodiments, the method further comprises a steam and condensed water flow path, which is as follows:

the steam from the steam main pipe is divided into six paths;

wherein, after the first path heats the shell-side medium through the cooling water of the front seal head 16A of the heat exchange solidification separator and the regenerated steam inlet 1A, the condensate is discharged through the corresponding front seal head discharge port 14A, the corresponding rear seal head discharge port 8A and the pipe-side condensate discharge valve;

the second path enters a jacket through a shell-side jacket steam inlet 4A of a heat exchange solidification separator, and after the shell of the corresponding tube box 18A is heated, condensed water is discharged through three corresponding jacket steam condensate outlets 10A, 11A and 12A;

the third path enters a shell side through a shell side steam hot boiling steam adding valve 5 of a heat exchange curing separator, after the shell side is heated, condensate generates high molecular substances and is discharged from discharge ports 12 and 14 when the condensate is regenerated by the heat exchange curing separator;

after the fourth path heats the shell-side medium through the cooling water of the front end enclosure 16A of the other heat exchange solidification separator and the regenerated steam inlet 1A, condensate is discharged through the corresponding front end enclosure discharge port 14A, the corresponding rear end enclosure discharge port 8A and the pipe-side condensate discharge valve;

in the fifth path, after the shell of the corresponding tube box 18A is heated through an inlet jacket of a shell-side jacket steam inlet 4A of another heat exchange solidification separator, condensed water is discharged through three corresponding jacket steam condensate outlets 10A, 11A and 12A;

and the sixth path enters a shell side through a shell side steam hot boiling steam adding valve 22 of the other heat exchange solidification separator, and after the shell side is heated, condensate is discharged through high molecular substance discharge ports 26 and 21 generated during regeneration of the heat exchange solidification separator.

In some embodiments, when the solid matter in the shell side of the heat exchange solidification separator increases to affect heat exchange and wastewater passage, the regeneration process is performed as follows:

the cooling water and regenerated steam inlet 1A and the cooling water outlet 7A are closed after heat exchange, cooling water feeding is stopped, the front seal head discharge port 14A and the rear seal head discharge port 8A are opened, and accumulated water is discharged;

closing the shell side waste water inlet 3A, opening the shell side drain outlet 13A, and draining shell side accumulated liquid;

and opening a shell side jacket steam inlet 4A, heating the shell side and a pipe box 18A to liquefy the high molecular organic matters solidified in the shell side, and discharging and recovering the high molecular organic matters from a shell side discharge port 13A to recover the production capacity.

As shown in fig. 5, a wastewater inlet main pipe control valve 1 and a wastewater outlet main pipe control valve 16 are arranged between two parallel heat exchange solidification separators, and a wastewater temperature display TI-2 of the wastewater inlet main pipe is arranged;

one heat exchange solidification separator comprises a wastewater inlet control valve 2, a regenerative heating steam control valve 3, a cooling water inlet valve 4, a shell-side steam hot boiling steam adding valve 5, a shell-side jacket steam adding valve 6, a shell layer exhaust valve 7, a cooling water heat exchange rear outlet valve 8, end socket and tube-side condensed water emptying valves 9 and 15, jacket steam condensed water discharge valves 10 and 13, a wastewater heat exchange rear outlet valve 11 and high polymer discharge ports 12 and 14 generated during regeneration;

the other heat exchange solidification separator comprises a wastewater inlet control valve 17, a regenerative heating steam control valve 18, a cooling water inlet valve 19, a shell-side steam hot boiling steam adding valve 22, a shell-side jacket steam adding valve 23, a shell layer exhaust valve 25, a cooling water heat exchange rear outlet valve 30, end socket and tube-side condensed water emptying valves 20 and 28, jacket steam condensed water discharge valves 10 and 13, a wastewater heat exchange rear outlet valve 29, and high polymer discharge ports 21 and 26 generated during regeneration;

the instrument of the heat exchange solidification separator comprises a regeneration heating steam pressure display PI-1, a waste water inlet pressure display PI-2, a waste water outlet pressure display PI-3, a cooling water outlet pressure display PI-4, a regeneration heating steam temperature display TI-1, a waste water shell pass inlet side temperature display TI-3, a waste water shell pass outlet side temperature display TI-4 and a cooling water outlet side temperature display TI-5;

the other instrument of the heat exchange solidification separator comprises a regeneration heating steam pressure display PI-5, a waste water inlet pressure display PI-6, a waste water outlet pressure display PI-7, a cooling water outlet pressure display PI-8, a regeneration heating steam temperature display TI-6, a waste water shell pass inlet side temperature display TI-7, a waste water shell pass outlet side temperature display TI-8 and a cooling water outlet side temperature display TI-9.

The invention also provides a use method of the device for separating the switchable regenerated organic wastewater through heat exchange, solidification and separation, which comprises the following steps:

step 1, checking each heat exchange solidification separator, and corresponding valves, pipelines, instruments and control systems to be in a standby state;

step 2, starting a main wastewater inlet pipe control valve 1 from a front-end process, starting feeding, starting an inlet control valve 2 of a heat exchange solidification separator, starting feeding to the heat exchange solidification separator, starting a wastewater heat exchange rear outlet valve 11 of the heat exchange solidification separator, and opening a main wastewater outlet pipe control valve 16;

step 3, gradually opening a cooling water inlet valve 4 of the heat exchange solidification separator, and opening a cooling water heat exchange rear outlet valve 8 of the heat exchange solidification separator to realize heat exchange and temperature reduction of the wastewater in the equipment;

step 4, controlling the temperature by controlling a cooling water inlet valve 4 or a cooling water heat exchange back outlet valve 8;

step 5, feeding back a pressure difference value between a waste water inlet pressure display PI-2 of the heat exchange solidification separator and a waste water outlet pressure display PI-3 of the heat exchange solidification separator and a waste water shell side outlet side temperature display TI-4 of the heat exchange solidification separator to a corresponding PLC module by judging, and setting an alarm value, and automatically alarming when the pressure difference value or the waste water shell side outlet side temperature display TI-4 value reaches an alarm limit; after receiving the alarm, carrying out system switching in time;

step 6, when the temperature of the outlet side of the waste water shell side displays the display value of TI-4, or the pressure difference value between the waste water inlet pressure display PI-2 and the waste water outlet pressure display PI-3 is alarmed and switched;

step 7, when the solid substances in the shell pass of the heat exchange solidification separator are increased to influence heat exchange and waste water passing, carrying out a regeneration process, and starting another heat exchange solidification separator;

the step of starting another heat exchange solidification separator is as follows:

step 8, opening an inlet control valve 17 of the other heat exchange solidification separator, starting feeding to the heat exchange solidification separator, and opening a waste water heat exchange rear outlet valve 29 of the heat exchange solidification separator;

step 9, gradually opening a cooling water inlet valve 18 of the heat exchange solidification separator, and opening a cooling water heat exchange rear outlet valve 30 of the heat exchange solidification separator to realize heat exchange and temperature reduction of the wastewater in the equipment;

step 10, controlling the temperature by controlling a cooling water inlet valve 18 or a cooling water heat exchange rear outlet valve 30;

step 11, feeding back a pressure difference value between a waste water inlet pressure display PI-6 of the heat exchange solidification separator and a waste water outlet pressure display PI-7 of the heat exchange solidification separator and a waste water shell side outlet side temperature display TI-8 of the heat exchange solidification separator to a corresponding PLC module by judging, and setting an alarm value, and automatically alarming when the pressure difference value or the waste water shell side outlet side temperature display TI-8 reaches an alarm limit; after receiving the alarm, carrying out system switching in time;

step 12, when the temperature of the outlet side of the waste water shell side displays the display value of TI-8, or the pressure difference value between the waste water inlet pressure display PI-6 and the waste water outlet pressure display PI-7 is alarmed and switched;

the regeneration procedure was carried out as follows:

step 13, closing the waste water heat exchange outlet valve 11 and the waste water inlet control valve 2 of the heat exchange solidification separator;

step 14, closing a cooling water inlet valve 4 and a cooling water outlet valve 8 of the heat exchange solidification separator;

step 15, opening a seal head condensed water emptying valve 15 and a tube pass condensed water emptying valve 9 of the heat exchange solidification separator, and draining accumulated water on a tube pass; opening steam condensate water discharge valves 12 and 13 of the jacket to drain accumulated water in the jacket;

step 16, opening the high molecular substance discharge and outlet valves 12 and 14 generated during regeneration of the heat exchange solidification separator, and discharging liquid wastewater of equipment;

step 17, slowly opening a regenerative heating steam control valve 3 and a shell-side jacket steam boiling adding valve 6 of the heat exchange solidification separator, adding steam to a tube side and a jacket of the device, heating and regenerating, and simultaneously opening an end enclosure, a tube side condensate water emptying valve and a jacket steam condensate water discharge valve to discharge condensate water;

18, in the heating process, gradually melting substances attached to the inner wall of the heat exchange solidification separator, the wall of the heat exchange tube and the catching fins, and discharging high molecular substances generated in the regeneration of the heat exchange solidification separator out of the valves 12 and 14 for recycling;

step 19, after the regeneration is finished, adjusting the opening state to enable the regenerated heat exchange solidification separator to be in a standby state, switching to be used after the resistance of another running heat exchange solidification separator is increased or the outlet temperature is increased to an alarm value, and switching another heat exchange solidification separator to enter a regeneration process;

and 20, circularly cutting two heat exchange solidification separators to ensure the normal production and stable operation of the system.

After any heat exchange solidification separator enters a regeneration process and no matter is discharged, steam is added into a waste liquid inlet through a shell-side steam hot boiling steam adding valve 5 for boiling; and (4) discharging the cooking liquor from outlet valves 12 and 14 for discharging high molecular substances generated during regeneration, returning to a multi-effect evaporation water inlet area, and judging whether the system regeneration is finished or not according to the water boiling water outlet effect.

In practical application, the steps can avoid dead angles between the pipes.

The foregoing detailed description of the preferred embodiments of the invention has been presented. It should be understood that numerous modifications and variations could be devised by those skilled in the art in light of the present teachings without departing from the inventive concepts. Therefore, the technical solutions available to those skilled in the art through logic analysis, reasoning and limited experiments based on the prior art according to the concept of the present invention should be within the scope of protection defined by the claims.