阅读说明：本技术 一种污泥干化装置及污泥干化系统 (Sludge drying device and sludge drying system ) 是由 马云龙 王乐乐 卿梦磊 孔凡海 王凯 姚燕 雷嗣远 鲍强 杨晓宁 于 2021-07-20 设计创作，主要内容包括：本发明涉及一种污泥干化装置及污泥干化系统,装置包括加热室和加热控制机构,加热室具有壳体,壳体上开设有污泥进口、污泥出口；加热控制机构包括传动轴组件、驱动组件,传动轴组件一端伸入壳体内,另一端位于壳体外并与驱动组件连接,传动轴组件包括内轴、外轴,内轴具有与蒸汽源相连通的内通道,外轴具有外通道,内轴设在外轴的外通道内,且内轴的内通道与外轴的外通道相连通,位于壳体内外轴的外周面上设有沿其轴向分布的螺旋叶片,驱动组件用于驱动外轴旋转以带动螺旋叶片旋转。本发明通过加热室和加热控制机构,并利用现有蒸汽源作为稳定热源,既实现余热蒸汽有效利用,又提高换热效果,降低污泥干化的能耗,节约运行成本,节能减排。(The invention relates to a sludge drying device and a sludge drying system, wherein the device comprises a heating chamber and a heating control mechanism, wherein the heating chamber is provided with a shell, and the shell is provided with a sludge inlet and a sludge outlet; the heating control mechanism comprises a transmission shaft assembly and a driving assembly, one end of the transmission shaft assembly extends into the shell, the other end of the transmission shaft assembly is located outside the shell and connected with the driving assembly, the transmission shaft assembly comprises an inner shaft and an outer shaft, the inner shaft is provided with an inner channel communicated with the steam source, the outer shaft is provided with an outer channel, the inner shaft is arranged in the outer channel of the outer shaft, the inner channel of the inner shaft is communicated with the outer channel of the outer shaft, helical blades distributed along the axial direction of the helical blades are arranged on the outer peripheral surface of the outer shaft in the shell, and the driving assembly is used for driving the outer shaft to rotate so as to drive the helical blades to rotate. According to the invention, through the heating chamber and the heating control mechanism and by using the existing steam source as a stable heat source, the effective utilization of waste heat steam is realized, the heat exchange effect is improved, the energy consumption of sludge drying is reduced, the operation cost is saved, and the energy is saved and the emission is reduced.)

1. A sludge drying device is characterized in that: the device comprises:

the heating chamber is provided with a shell, and a sludge inlet and a sludge outlet are formed in the shell;

the heating control mechanism comprises a transmission shaft assembly and a driving assembly, one end of the transmission shaft assembly extends into the shell, the other end of the transmission shaft assembly is located outside the shell and connected with the driving assembly, the transmission shaft assembly comprises an inner shaft and an outer shaft, the inner shaft is provided with an inner channel communicated with a steam source, the outer shaft is provided with an outer channel, the inner shaft is arranged in the outer channel of the outer shaft, the inner channel of the inner shaft is communicated with the outer channel of the outer shaft, spiral blades distributed along the axial direction of the spiral blades are arranged on the outer peripheral surface of the outer shaft in the shell, and the driving assembly is used for driving the outer shaft to rotate so as to drive the spiral blades to rotate.

2. The sludge drying device of claim 1, wherein: the inner channel of the inner shaft is provided with an inlet, the outer channel of the outer shaft is provided with an outlet, and the inlet of the inner shaft and the outlet of the outer shaft are both positioned outside the shell.

3. The sludge drying device of claim 1, wherein: the inner passage of the inner shaft has an inlet at the other end of the inner shaft that is sealed from the other end of the outer shaft.

4. The sludge drying device of claim 1, wherein: the heating control mechanism further comprises a coil pipe, the coil pipe is arranged in the shell, the coil pipe is provided with an inlet and an outlet, the inlet and the outlet of the coil pipe are located on the shell, and the inlet of the coil pipe is communicated with the steam source.

5. The sludge drying device of claim 1, wherein: the sludge inlet is arranged above the shell, the sludge outlet is arranged below the shell, the sludge inlet and the sludge outlet are arranged along the distribution direction of the helical blades, and the helical blades rotate to convey the sludge entering from the sludge inlet to the sludge outlet.

6. The sludge drying device of claim 1, wherein: the shell is provided with a tail gas outlet, and the tail gas outlet is used for discharging the treated tail gas.

7. The sludge drying device of claim 1, wherein: the driving assembly comprises a driving motor and a transmission part, and the driving motor drives the outer shaft to rotate through the transmission part.

8. The utility model provides a sludge drying system, includes wet sludge storage storehouse, sludge drying device, dry sludge storage storehouse, first conveyor, second conveyor, third conveyor, wet sludge storage storehouse be used for saving wet mud, first conveyor be used for with wet sludge storage storehouse in wet sludge carry to the sludge drying device, the sludge drying device be used for heating wet mud, second conveyor be used for with the dry mud after heating carry to dry sludge storage storehouse, third conveyor be used for with dry sludge storage storehouse in dry sludge storage storehouse carry to coal fired boiler, its characterized in that: the sludge drying device is the sludge drying device as claimed in any one of claims 1 to 7.

9. The sludge drying system of claim 8, wherein: the system also comprises a waste liquid treatment device, and the waste liquid treatment device is used for being communicated with the sludge drying device.

10. The sludge drying system of claim 8, wherein: the system also comprises an exhaust gas circulating pipeline, and the exhaust gas circulating pipeline is communicated with the wet sludge storage bin, the sludge drying device, the dry sludge storage bin and the coal-fired boiler.

Technical Field

The invention belongs to the field of sludge drying, and particularly relates to a sludge drying device and a sludge drying system.

Background

The sludge produced in the sewage treatment process is a heterogeneous body consisting of organic debris, bacterial bodies, inorganic particles, colloids and the like. At present, the sludge co-combustion of the coal-fired power plant has a great advantage in the sludge disposal method. However, because the water content is high, and the water content is usually 80%, the direct blending combustion in the coal-fired power plant usually causes negative effects, such as blocking a coal conveying system, increasing the abrasion of a flue gas system, and affecting the thermal efficiency of a boiler, so that the sludge cannot be simply used as a fuel, generally needs to be dried to convert sludge with low calorific value into usable fuel with high calorific value, and then the sludge fuel is blended and combusted by the coal-fired boiler.

In the sludge drying process, water vapor in the sludge is collected in the drying machine, and the water vapor is taken out of the drying machine by a ventilation device to form sludge drying tail gas, so that the structure is complex, and meanwhile, in the sludge drying and moisture removing process, a large amount of heat is required to be supplied, and energy waste can be caused by adopting an electric heating device. The traditional tail gas treatment needs to add a spraying system, an activated carbon adsorber and the like, so that the whole equipment structure is complex and the economy is not high.

Disclosure of Invention

The invention aims to provide a high-efficiency, stable and economic sludge drying device and a sludge drying system, and solves the problems of complex structure and high cost of the conventional sludge drying equipment.

In order to achieve the purpose, the invention adopts the technical scheme that:

a sludge drying apparatus, the apparatus comprising:

the heating chamber is provided with a shell, and a sludge inlet and a sludge outlet are formed in the shell;

the heating control mechanism comprises a transmission shaft assembly and a driving assembly, one end of the transmission shaft assembly extends into the shell, the other end of the transmission shaft assembly is located outside the shell and connected with the driving assembly, the transmission shaft assembly comprises an inner shaft and an outer shaft, the inner shaft is provided with an inner channel communicated with a steam source, the outer shaft is provided with an outer channel, the inner shaft is arranged in the outer channel of the outer shaft, the inner channel of the inner shaft is communicated with the outer channel of the outer shaft, spiral blades distributed along the axial direction of the spiral blades are arranged on the outer peripheral surface of the outer shaft in the shell, and the driving assembly is used for driving the outer shaft to rotate so as to drive the spiral blades to rotate.

Preferably, the inner passage of the inner shaft has an inlet, the outer passage of the outer shaft has an outlet, and the inlet of the inner shaft and the outlet of the outer shaft are both located outside the housing.

Preferably, the inner passage of the inner shaft has an inlet at the other end of the inner shaft, the other end of the inner shaft being sealed from the other end of the outer shaft.

Preferably, the heating control mechanism further comprises a coil pipe, the coil pipe is arranged in the shell and provided with an inlet and an outlet, the inlet and the outlet of the coil pipe are located on the shell, and the inlet of the coil pipe is communicated with the steam source.

Preferably, the sludge inlet is arranged above the shell, the sludge outlet is arranged below the shell, the sludge inlet and the sludge outlet are arranged along the distribution direction of the helical blades, and the helical blades rotate to convey the sludge entering from the sludge inlet to the sludge outlet.

Preferably, the shell is provided with a tail gas outlet, and the tail gas outlet is used for discharging the treated tail gas.

Preferably, the driving assembly comprises a driving motor and a transmission part, and the driving motor drives the outer shaft to rotate through the transmission part.

Another object of the present invention is to provide a sludge drying system.

In order to achieve the purpose, the invention adopts the technical scheme that:

sludge drying system, it includes wet sludge warehouse, sludge drying device, dry sludge warehouse, first conveyor, second conveyor, third conveyor, wet sludge warehouse be used for saving wet mud, first conveyor be used for with wet sludge warehouse in carry to sludge drying device, sludge drying device be used for heating wet mud, second conveyor be used for carrying the dry mud after heating extremely dry sludge warehouse, third conveyor be used for with dry sludge warehouse in dry mud carry to coal fired boiler.

Preferably, the system further comprises a waste liquid treatment device, and the waste liquid treatment device is used for being communicated with the sludge drying device.

Preferably, the system also comprises an exhaust gas circulating pipeline, and the exhaust gas circulating pipeline is communicated with the wet sludge storage bin, the sludge drying device, the dry sludge storage bin and the coal-fired boiler.

Due to the application of the technical scheme, compared with the prior art, the invention has the following advantages: the sludge drying device provided by the invention utilizes the heating chamber and the heating control mechanism and utilizes the existing steam source as a stable heat source, so that the effective utilization of waste heat steam is realized, the heat exchange effect is improved, the sludge drying energy consumption is reduced, the operation cost is saved, and better energy saving and emission reduction effects are achieved;

according to the sludge drying system provided by the invention, the wet sludge storage bin, the sludge drying device, the dry sludge storage bin, the first conveying device, the second conveying device and the third conveying device are arranged, the original boiler and the smoke dust purifying equipment of the power plant are utilized, the tail gas dried by the drying device is conveyed to the boiler for combustion, and the tail gas enters the smoke dust purifying equipment along with the original smoke gas after combustion, so that the purpose of sludge drying tail gas treatment is achieved, and the investment and the operation cost are saved.

Drawings

FIG. 1 is a schematic structural view of a sludge drying apparatus according to the first embodiment;

fig. 2 is a schematic structural diagram of a sludge drying system according to the second embodiment.

In the above drawings:

1-shell, 11-sludge inlet, 12-sludge outlet, 13-tail gas outlet, 2-inner shaft, 3-outer shaft, 31-outer shaft outlet, 4-helical blade, 5-driving motor, 6-transmission part, 7-coil, 71-coil inlet, 72-coil outlet, 8-dry sludge storage bin, 9-first conveying device, 10-second conveying device, 11-third conveying device, 12-coal-fired boiler, 13-smoke dust purification system, 14-waste liquid treatment device, 15-steam turbine, 16-wet sludge storage bin and 17-sludge drying device.

Detailed Description

The invention will be further described with reference to examples of embodiments shown in the drawings to which the invention is attached.

Example one

The embodiment provides a sludge drying device 17, and referring to fig. 1, the device includes a heating chamber and a heating control mechanism, the heating chamber has a housing 1, a sludge inlet 11, a sludge outlet 12, and a tail gas outlet 13 are provided on the housing 1, the sludge inlet 11 supplies sludge to enter the housing 1, the sludge outlet 12 is used for discharging treated sludge, and the tail gas outlet 13 is used for discharging treated tail gas.

The heating control mechanism has the following specific structure: it includes the transmission shaft subassembly, drive assembly, transmission shaft subassembly one end stretches into in the casing 1, the other end is located casing 1 outside and is connected with drive assembly, the transmission shaft subassembly includes interior axle 2, outer axle 3 has the interior passageway that is linked together with the steam source, outer axle 3 has outer passageway, interior axle 2 sets up in the outer passageway of outer axle 3, and the interior passageway of interior axle 2 is linked together with the outer passageway of outer axle 3, be convenient for steam from the interior passageway of interior axle 2 flow to the outer passageway of outer axle 3 in. The opening is established outward to casing 1, and drive shaft subassembly one end is passed through this opening and is stretched into in the casing 1, sets up sealing member between this opening and the drive shaft subassembly, and reinforcing sealing performance prevents that steam from spilling over.

The outer peripheral surface of the outer shaft 3 positioned in the shell 1 is provided with the helical blades 4 distributed along the axial direction of the outer shaft, the driving assembly is used for driving the outer shaft 3 to rotate so as to drive the helical blades 4 to rotate, when sludge enters the helical blades 4 from the sludge inlet 11, when the helical blades 4 rotate, wet sludge on the outer shaft 3 can be rotationally heated due to heating of an outer channel of the outer shaft, so that moisture in the wet sludge is removed, the wet sludge is changed into dry sludge, a steam source is waste heat steam of the original power plant steam turbine 15, and a stable heat source of the sludge drying device 17 is provided by using the waste heat steam of the original power plant steam turbine 15, so that the waste heat steam of the steam turbine 15 is effectively utilized, the heat source cost required in the sludge drying process is reduced, and good energy saving and emission reduction effects are achieved; the steam waste heat provided by the steam turbine 15 is introduced into the sludge drying device 17 to dry the sludge, and meanwhile, the waste gas generated in the wet sludge drying process is discharged through the tail gas outlet 13, so that a spraying system, an activated carbon absorber and the like are not needed, the waste gas generated in the sludge drying process is treated in a synergistic manner, the structure is simplified, the investment and the operation cost of the sludge drying tail gas treatment are reduced, and the sludge drying device has better economical efficiency.

A wet sludge storage bin 16 is arranged above the sludge inlet 11, so that sludge in the wet sludge storage bin 16 can conveniently enter the shell 1 through the sludge inlet 11 by gravity. A dry sludge storage bin 8 is arranged below the sludge outlet 12, and dried sludge enters the dry sludge storage bin 8 through the sludge outlet 12 to collect dry sludge.

Further, the heating control mechanism further comprises a coil 7, the coil 7 is arranged in the shell 1, the coil 7 is provided with an inlet 71 and an outlet 72, the inlet 71 and the outlet 72 of the coil 7 are located on the shell 1, the inlet 71 of the coil 7 is communicated with a steam source, steam enters the shell 1 of the coil 7 from the inlet 71 and is heated to dry wet sludge in the shell 1, the wet sludge is discharged from the outlet 72, and the steam source is waste heat steam of the steam turbine 15 of the original power plant. The inlet 71 of the coil 7 is preferably located above the housing 1 and the outlet 72 is located below the housing 1 to increase the drying area. Or as in fig. 1, two sets of coils 7 are arranged, one set of coils 7 is arranged above the helical blades, and the other set of coils 7 is arranged below the helical blades, so that the heating space is enlarged, and wet sludge in the shell 1 is further dried.

The sludge drying device adopts a transmission shaft assembly and a shell inner coil pipe combined drying mode, the heat exchange efficiency is high, wet sludge is rotatably heated in an indirect heat exchange mode, the moisture content of the wet sludge is 40% -80%, after the wet sludge is treated by the sludge drying device 17, the moisture content of the dry sludge is 10% -50%, the drying effect is good, and the working efficiency is high.

Preferably, the inner channel of the inner shaft 2 is provided with an inlet, the outer channel of the outer shaft 3 is provided with an outlet 31, the inlet of the inner channel of the inner shaft 2 and the outlet 31 of the outer channel of the outer shaft 3 are both positioned outside the housing 1, the outlet of the inner channel of the inner shaft 2 and the inlet of the outer channel of the outer shaft 3 are both positioned inside the housing 1, steam enters the inner channel of the inner shaft 2 and the outer channel of the outer shaft 3 through the inlet of the inner shaft 2 outside the housing 1, and the reacted steam flows out through the outlet 31 of the outer shaft 3, so that the residence time of the steam in the inner channel of the inner shaft 2 and the outer channel of the outer shaft 3 is increased, heat is stored, the drying effect is improved, the steam after heat exchange is conveniently discharged, and the steam after heat exchange is easily collected outside the housing 1. If the outlet of the outer channel of the outer shaft 3 is arranged in the shell 1, unreacted steam can be taken away, heat loss is caused, and the collection of steam after heat exchange is not facilitated.

Furthermore, the inlet of the inner shaft 2 is positioned at the other end part of the inner shaft 2, the other end part of the inner shaft 2 and the other end part of the outer shaft 3 are sealed, and steam only enters from the inlet of the inner shaft 2 positioned outside the shell 1, so that the sealing performance of the transmission shaft assembly can be improved.

Preferably, the sludge inlet 11 is formed above the shell 1, the sludge outlet 12 is formed below the shell 1, the sludge inlet 11 and the sludge outlet 12 are arranged along the distribution direction of the helical blades 4, the helical blades 4 rotate to convey the sludge phase sludge outlet 12 entering from the sludge inlet 11, namely the sludge inlet 11 is close to the inlet of the inner shaft 2, and the sludge outlet 12 is close to the outlet of the inner shaft 2, so that the sludge is ensured to be discharged after being dried on the helical blades 4 for a long time, and the drying effect is improved.

The drive assembly includes driving motor 5, drive disk assembly 6, and driving motor 5 drives outer axle 3 rotation through drive disk assembly 6, and a structural style of drive disk assembly 6 is that it includes a plurality of matched with gears, and one of them gear is connected with driving motor 5's output shaft, and drive disk assembly 6 still can be for other structures, as long as can drive outer rotatory structure of axle 3 all be applicable to this application with driving motor 5 cooperation.

The transmission shaft assembly can be provided with a plurality of transmission shafts, preferably 2 or 4 transmission shafts, so that the heat exchange efficiency is improved.

Example two

The embodiment provides a sludge drying system, refer to fig. 2, which includes a wet sludge storage 16, a sludge drying device 17, a dry sludge storage 8, a first conveying device 9, a second conveying device 10, and a third conveying device 11, where the wet sludge storage 16 is used for storing wet sludge, the first conveying device 9 is used for conveying wet sludge in the wet sludge storage 16 to the sludge drying device 17, the sludge drying device 17 is used for heating wet sludge, the second conveying device 10 is used for conveying heated dry sludge to the dry sludge storage 8, the third conveying device 11 is used for conveying dry sludge in the dry sludge storage 8 to a coal-fired boiler, the sludge drying device 17 is the sludge drying device 17, and the sludge drying device 17 includes a heating chamber and a heating control mechanism.

The first conveyor 9, the second conveyor 10, and the third conveyor 11 may be preferably screw conveyors or endless track conveyors, which are conventional and are not limited in structure.

The working process of the sludge drying system is as follows: the sludge in the wet sludge storage bin 16 enters a sludge drying device 17 through a first conveying device 9, the wet sludge is dried and then conveyed to a dry sludge storage bin 8 through a second conveying device 10, and then the dry sludge in the dry sludge storage bin 8 is conveyed to the front end of a coal feeder (added with a pulverized coal feeder) through a third conveying device 11 and enters a hearth of a coal-fired boiler 12 along with pulverized coal for combustion, so that the effective treatment of the sludge is realized, and the sludge treatment cost is reduced.

The system also comprises an exhaust gas circulating pipeline which is communicated with the wet sludge storage bin 16, the sludge drying device 17, the dry sludge storage bin 8 and the coal-fired boiler 12.

The tail gas treatment process in sludge drying comprises the following steps: waste gas generated by sludge self-oxidation in the wet sludge storage bin 16, waste gas generated in the sludge drying process and waste gas generated in the dry sludge storage bin 8 are sent to a hearth of the coal-fired boiler 12 through a waste gas flow pipeline for combustion, and tail gas generated after combustion and original flue gas are treated by an original smoke purification system 13 of a power plant and then are discharged after reaching standards. The original smoke and dust purification system 13 comprises an original dust remover, a denitration reactor, a desulfurization tower and the like of a power plant. The waste gas generated in the sludge drying process contains organic matters, ammonia, sulfur dioxide, part of odor and the like, and can be effectively treated after passing through a combustion and smoke purification system 13 of a hearth of a coal-fired boiler 12, so that the waste gas reaches the standard and is discharged.

Preferably, the wet sludge storage 16 is arranged above the inlet of the first screw conveyer, and wet sludge enters the first screw conveyer through gravity and is then conveyed to the inlet of the sludge drying device 17 through the first screw conveyer.

The system also comprises a waste liquid treatment device, the waste liquid treatment device is used for being communicated with the sludge drying device 17, the waste liquid treatment device 14 can be original equipment of a power plant, namely, condensed waste liquid generated in the sludge drying process is discharged to the original waste liquid treatment device 14 of the power plant, and the recycling of the power plant is carried out after treatment, so that the zero discharge of waste water is realized.

The embodiment provides a high efficiency, it is stable, economic sludge drying system, sludge drying equipment and coal fired boiler, smoke and dust clean system moves in coordination, sludge drying system utilizes original power plant coal fired boiler and smoke and dust clean system (desulfurization, denitration, flue gas dust pelletizing system), send mummification back tail gas to coal fired boiler furnace burning, together get into back desulfurization along with original flue gas after the burning, denitration, flue gas dust pelletizing system, both reached the purpose that sludge drying tail gas handled, simultaneously also make full use of original coal fired boiler of power plant and smoke and dust clean system, investment and running cost have been practiced thrift.

The above embodiments are merely illustrative of the technical ideas and features of the present invention, and the purpose thereof is to enable those skilled in the art to understand the contents of the present invention and implement the present invention, and not to limit the protection scope of the present invention. All equivalent changes and modifications made according to the spirit of the present invention should be covered within the protection scope of the present invention.