阅读说明：本技术 一种静电凝并和热交换系统及其使用方法 (Electrostatic coagulation and heat exchange system and use method thereof ) 是由 邓迁君 王美华 周书山 于 2020-06-29 设计创作，主要内容包括：本发明提供一种静电凝并和热交换系统及其使用方法,所述系统由设备底座(1)、设备本体(2)、排污管(3)、下气室(4)、导流板(5)、负高压电场区(6)、热风保护系统(7)、余热回收系统(8)、余热利用系统(9)、排放口(10)组成,其中设备本体安装于设备底座上；排污管、导流板安装于设备本体下气室；负高压电场区位于设备本体中段；热风保护系统安装于负高压电场区,保护电场绝缘瓷瓶结露；余热回收系统横穿负高压电场区；余热利用系统安装于设备本体侧面；排放口安装于设备本体正上方。本发明将烟气除尘、有色烟羽治理集尘化设计,低能耗的针对不同工况做到节能减排,实现稳定可靠运行。(The invention provides an electrostatic coagulation and heat exchange system and a using method thereof, wherein the system consists of an equipment base (1), an equipment body (2), a blow-off pipe (3), a lower air chamber (4), a guide plate (5), a negative high-voltage electric field area (6), a hot air protection system (7), a waste heat recovery system (8), a waste heat utilization system (9) and a discharge port (10), wherein the equipment body is arranged on the equipment base; the blow-off pipe and the flow guide plate are arranged in the lower air chamber of the equipment body; the negative high-voltage electric field area is positioned in the middle section of the equipment body; the hot air protection system is arranged in the negative high-voltage electric field area and protects the electric field insulating porcelain insulator from dewing; the waste heat recovery system traverses the negative high-voltage electric field area; the waste heat utilization system is arranged on the side surface of the equipment body; the discharge port is installed right above the device body. The invention realizes the design of dust removal of flue gas and treatment and dust collection of colored smoke plume, saves energy and reduces emission aiming at different working conditions with low energy consumption, and realizes stable and reliable operation.)

1. An electrostatic coagulation and heat exchange system comprises an equipment base (1), an equipment body (2), a blow-off pipe (3), a lower air chamber (4), a guide plate (5), a negative high-voltage electric field area (6), a hot air protection system (7), a waste heat recovery system (8), a waste heat utilization system (9) and a discharge port (10), wherein the equipment body (2) is arranged on the equipment base (1); the blow-off pipe (3) and the guide plate (5) are arranged in the lower air chamber of the equipment body; the negative high-voltage electric field area (6) is positioned in the middle section of the equipment body; the hot air protection system (7) is arranged in the negative high-voltage electric field area to protect the electric field insulating porcelain insulator from dewing; the waste heat recovery system (8) traverses the negative high-voltage electric field area; the waste heat utilization system (9) is arranged on the side surface of the equipment body; the discharge port (10) is installed right above the apparatus body.

2. An electrostatic coalescence and heat exchange system according to claim 1, wherein the apparatus base (1) is bolted to an on-site base, and the lower chamber (4) is mounted to the lower part of the apparatus body (2).

3. An electrostatic coalescence and heat exchange system according to claim 1, wherein the drain pipe (3) is installed below the lower chamber (4).

4. An electrostatic coalescence and heat exchange system according to claim 1, 2 or 3, wherein the deflector (5) is mounted to the bottom of the lower chamber (4).

5. The electrostatic coagulation and heat exchange system according to claim 1, 2 or 3, wherein the negative high-voltage electric field area (6), the hot air protection system (7) and the waste heat recovery system (8) are arranged in the middle of the equipment body (2); the waste heat utilization system (9) is arranged at the upper end of the negative high-voltage electric field area (6).

6. A method of using the electrostatic coalescence and heat exchange system of any one of claims 1 to 5, comprising the steps of:

step 1, before the static coagulation and heat exchange system is started, starting a hot air protection system, and after the temperature of the hot air protection system reaches a designed temperature value and is stable, performing the operation flow of step 2 after the insulation porcelain bottle forms condensation protection;

step 2, opening the lower air chamber, and after the flue gas to be treated enters the electrostatic coagulation and heat exchange system, changing the flow state of the flue gas by a guide plate so that the flue gas uniformly passes through a negative high-voltage electric field area;

step 3, starting a waste heat recovery system, recovering the waste heat of the flue gas, cooling the flue gas and air in a heat and cold exchange manner, and separating out evaporated water in the wet flue gas in the cooling process;

step 4, opening the negative high-voltage electric field area, releasing a large amount of charges in the negative high-voltage discharging process, adsorbing harmful substances in the wet flue gas and pollutants such as precipitated condensate water and the like to move towards the polar plate together in the process that the charges move towards the polar plate in the negative high-voltage electric field area, forming a water film on the polar plate, flowing to the lower air chamber, and discharging through a discharge pipe to achieve the purpose of emission reduction;

and 5, starting the waste heat utilization system, increasing the temperature of ambient air in the process of cooling the flue gas in the waste heat recovery system, reducing the relative humidity of the wet flue gas by the heated ambient air through the waste heat utilization system, ensuring that the wet flue gas does not dew during the cold and heat exchange with the atmosphere in the emission process, and ensuring that the visual pollution of smoke plume is removed.

Technical Field

The invention belongs to the technical field of wet flue gas dust removal, and particularly relates to an electrostatic coagulation and heat exchange system and a using method thereof, which are suitable for a colored smoke plume treatment process.

Background

The treatment of gas pollutants is an important task of current environmental protection work, and is typically the treatment of flue gas of combustion devices, such as flue gas discharged from fuel oil, gas, coal-fired boilers or gas turbines, internal combustion engines, and the discharge of pollutant gases in the industries of food, medicine, chemical products, and the like, the pollutants in the gas need to be separated, and clean gas is discharged into the atmosphere. In recent years, many new methods for gas treatment emerge, mainly including dry method, semi-dry method, wet method and the like, and the gas treatment device has a variety of fluidized beds, spray towers, bubbling beds, water beds and the like, and has different principles and structures and characteristics. The principle of all wet processing devices is to ensure that processing liquid and processed gas are fully and effectively contacted and are kept for a certain time, and simultaneously, the influence of impurities, solid matters or unclean matters in the gas or the liquid on the operation is solved, and the continuous and stable operation of the equipment is ensured.

Chinese patent application CN207056301U discloses an efficient multi-stage rotary vane type dynamic liquid film smoke treatment device, which comprises a cylindrical tower body and a central rotating shaft, wherein the central rotating shaft is installed at the central position in the tower in a penetrating manner, the top end of the tower body is provided with a cover plate, the cover plate is provided with a variable frequency driving device, and the variable frequency driving device drives the central rotating shaft to rotate; the bottom end of the tower body is provided with an inverted cone-shaped deslagging area; the tower body is internally provided with a dust removal area, a desulfurization area and a dehydration area from bottom to top in sequence, wherein the three areas are communicated, the desulfurization area is internally provided with at least an upper rotary vane device and a lower rotary vane device, each rotary vane device in the desulfurization area is arranged on a central rotating shaft, the dehydration area is internally provided with at least one rotary vane device, and the dehydration area is communicated with a flue gas outlet pipe.

The existing treatment device has large equipment volume and investment, and the gas treatment equipment which has small occupied area, complete functions, stable continuous operation, low operation cost, wide adaptability, less investment and high efficiency is expected to be developed in production. Meanwhile, with the increasing requirement of environmental protection, the exhaust emission index is higher and higher, and the requirement of ultra-purification and dust removal is met, and the synergistic treatment of colored smoke plume is an urgent technical problem to be solved, while the existing equipment cannot meet the requirement of environmental protection.

Disclosure of Invention

Based on the problems in the prior art, the invention provides an electrostatic coagulation and heat exchange system and a using method thereof, which are suitable for a colored smoke plume treatment process system and are mainly used for smoke emission systems of smoke after wet desulphurization, slag flushing tail gas of an iron and steel making blast furnace in an iron and steel plant, wet quenching exhaust gas, steel making continuous casting tail gas in the iron and steel plant, annealing pit tail gas in the iron and steel plant and the like.

According to a first aspect of the technical scheme, the invention provides an electrostatic coagulation and heat exchange system, which comprises an equipment base, an equipment body, a blow-off pipe, a lower air chamber, a guide plate, a negative high-voltage electric field area, a hot air protection system, a waste heat return system, a waste heat utilization system and a discharge port; the equipment body is arranged on the equipment base; the blow-off pipe and the flow guide plate are arranged in the lower air chamber of the equipment body; the negative high-voltage electric field area is positioned in the middle section of the equipment body; the hot air protection system is arranged in the negative high-voltage electric field area and protects the electric field insulating porcelain insulator from dewing; the waste heat recovery system traverses the negative high-voltage electric field area; the waste heat utilization system is arranged on the side surface of the equipment body; the discharge port is installed right above the device body.

The equipment base is fixed on a site foundation by using bolts, and the lower air chamber is arranged at the lower part of the equipment body; the blow-off pipe is arranged at the lower part of the lower air chamber. The guide plate is arranged at the bottom of the lower air chamber.

Furthermore, the negative high-voltage electric field area, the hot air protection system and the waste heat recovery system are arranged in the middle of the equipment body; the waste heat utilization system is arranged at the upper end of the negative high-voltage electric field area.

According to a second aspect of the present invention, there is provided a method of using an electrostatic coalescence and heat exchange system, comprising the steps of:

step 1, before the static coagulation and heat exchange system is started, starting a hot air protection system, and after the temperature of the hot air protection system reaches a designed temperature value and is stable, performing the operation flow of step 2 after the insulation porcelain bottle forms condensation protection;

step 2, opening the lower air chamber, and after the flue gas to be treated enters the electrostatic coagulation and heat exchange system, changing the flow state of the flue gas by a guide plate so that the flue gas uniformly passes through a negative high-voltage electric field area;

step 3, starting a waste heat recovery system, recovering the waste heat of the flue gas, cooling the flue gas and air in a heat and cold exchange manner, and separating out evaporated water in the wet flue gas in the cooling process;

step 4, opening the negative high-voltage electric field area, releasing a large amount of charges in the negative high-voltage discharging process, adsorbing harmful substances in the wet flue gas and pollutants such as precipitated condensate water and the like to move towards the polar plate together in the process that the charges move towards the polar plate in the negative high-voltage electric field area, forming a water film on the polar plate, flowing to the lower air chamber, and discharging through a discharge pipe to achieve the purpose of emission reduction;

and 5, starting the waste heat utilization system, increasing the temperature of ambient air in the process of cooling the flue gas in the waste heat recovery system, reducing the relative humidity of the wet flue gas by the heated ambient air through the waste heat utilization system, ensuring that the wet flue gas does not dew during the cold and heat exchange with the atmosphere in the emission process, and ensuring that the visual pollution of smoke plume is removed.

Compared with the prior art, the electrostatic coalescence and heat exchange system has the following beneficial effects.

1. The defects that the dust removal does not reach the standard, the colored smoke plume treatment is not thorough, the energy consumption is high, the working condition is unstable and the like in the operation process of the traditional split equipment for the working sections of dust removal, colored smoke plume treatment and the like are overcome.

2. The design of dust removal of flue gas and treatment and dust collection of colored smoke plume is realized, energy conservation and emission reduction are realized aiming at different working conditions with low energy consumption, and a stable and reliable running electrostatic coagulation and heat exchange system is realized.

3. According to the invention, pollutants in the flue gas are removed by negative high-voltage static electricity while the flue gas waste heat is recovered, and then the flue gas waste heat is discharged after being utilized, so that pollutants such as evaporated water, organic salts and the like in the flue gas are effectively removed. The system has low energy consumption, low cost after integration and higher pollutant capture rate by 30 percent compared with the traditional equipment, thereby really saving energy and reducing emission.

4. The electrostatic coagulation and heat exchange system has the advantages of simplified structure, stable and good matching among all components, lower operation cost and wide market prospect.

Drawings

Fig. 1 is a schematic structural view of an external form of an electrostatic coalescence and heat exchange system according to the present invention.

Fig. 2 is a schematic front view of fig. 1.

Fig. 3 is a schematic view of the internal structure of fig. 1.

The reference numbers in the drawings are: the device comprises a device base 1, a device body 2, a blow-off pipe 3, a lower air chamber 4, a guide plate 5, a negative high-voltage electric field area 6, a hot air protection system 7, a waste heat recovery system 8, a waste heat utilization system 9 and a discharge port 10.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention. Additionally, the scope of the present invention should not be limited to the particular structures or components or the particular parameters described below.

The invention relates to an electrostatic coagulation and heat exchange system and a using method thereof, the system is a novel EAS (electronic article surveillance) electrostatic coagulation and heat exchange system, a lower air chamber in the electrostatic coagulation and heat exchange system is provided with a flue gas air inlet, flue gas enters the system through the lower air chamber air inlet by a system fan, the flow direction of the flue gas is changed under the action of a guide plate, the flue gas is uniformly distributed and ascended in a cavity of the system, the uniformly distributed flue gas enters a negative high-voltage electric field area, ambient air is blown in by a fan in a waste heat recovery system to indirectly cool the flue gas, pollutants such as evaporated water, organic salt and the like are separated out in the flue gas cooling process, meanwhile, a negative high-voltage power supply works on the electric field, a large amount of electric charges are dispersed in the electric field area, the electric charges drive the pollutants in the flue gas to move to a dust collecting plate to be collected, the purified flue gas is in a saturated state, at the moment, the waste heat recovery system is blown in the environment air which is, the relative moisture content of the flue gas is reduced, the ultralow emission of the flue gas is met, and simultaneously the evaporated water in the flue gas is recovered, so that the energy is saved, the emission is reduced, and the visual pollution is eliminated.

As shown in fig. 1, 2 and 3, the electrostatic coagulation and heat exchange system of the present invention comprises an apparatus base 1, an apparatus body 2, a blow-off pipe 3, a lower air chamber 4, a guide plate 5, a negative high-voltage electric field area 6, a hot air protection system 7, a waste heat recovery system 8, a waste heat utilization system 9 and a discharge port 10. As shown in fig. 1, the static electricity coalescence and heat exchange system is provided with guard rails at the periphery thereof for maintenance personnel or production personnel to monitor the operation of the equipment; the total height of the electrostatic coagulation and heat exchange system is H, the mixed flue gas outlet on the electrostatic coagulation and heat exchange system is H2 (conical height), the mixed flue gas outlet is L1 (length) × W1 (width), the height of the straight section is H1, and the longest edge of the equipment base 1 is L and the width is W. The cold air enters from the cold air inlet, is mixed and then is discharged from the hot air outlet.

In the electrostatic coagulation and heat exchange system, the equipment base is fixed on a site basis by using bolts, a lower air chamber in the electrostatic coagulation and heat exchange system is a rectangular cavity, and the lower air chamber is arranged at the lower part of an equipment body by welding; the blow-off pipe 3 is a circular pipeline and is welded and arranged at the lower part of the lower air chamber; the guide plate is an L-shaped plate and is welded and installed at the bottom of the lower air chamber; the negative high-voltage electric field area is a spiral polar line, and is bolted and installed at the middle section of the equipment body after the upper and lower hanging frames are welded into a whole; the hot air protection system is a multi-pipeline system, is arranged at the upper end of the negative high-voltage electric field area through bolting, and protects insulators in the negative high-voltage electric field area from condensation; the waste heat recovery system is a plurality of pipelines which are vertically arranged, welded and installed in the middle of the equipment body, and forms a loop with the negative high-voltage electric field area in a staggered manner; the waste heat utilization system is a multi-pipeline system, and is bolted and installed on an upper air chamber of the equipment body.

Furthermore, in the working process, after the flue gas to be treated enters the electrostatic coagulation and heat exchange system, the flow state and direction of the flue gas are changed by the interference of the guide plate 5, so that the flue gas is uniformly distributed to pass through the negative high-voltage electric field area 6, the negative high-voltage electric field area 6 cools the flue gas through the waste heat recovery system 8 under the action of ambient air, evaporated water in the flue gas is separated out in the flue gas cooling process, meanwhile, a large amount of charges are released by the negative high-voltage electric field area 6, the charges drive particle pollutants in the flue gas and the separated evaporated water to move towards the dust collection plate of the negative high-voltage electric field area 6, water film slurry is formed on the surface of the dust collection plate, and the water film slurry flows to the lower air chamber 4 and is discharged through the. When the waste heat recovery system 7 cools the flue gas, the ambient air is heated again, and the air absorbing the heat of the flue gas is reduced and treated by the waste heat utilization system 9, so that the relative moisture content of the flue gas is ensured, the phenomenon of condensation does not occur when the flue gas exchanges heat with the atmosphere in the emission process, and the visual effect of colored smoke plume treatment is met.

As shown in fig. 1, 2 and 3, an electrostatic coagulation and heat exchange system is composed of an equipment base 1, an equipment body 2, a drain pipe 3, a lower air chamber 4, a guide plate 5, a negative high-voltage electric field area 6, a hot air protection system 7, a waste heat recovery system 8, a waste heat utilization system 9 and a discharge port 10, wherein the equipment body is installed on the equipment base; the blow-off pipe and the flow guide plate are arranged in the lower air chamber of the equipment body; the negative high-voltage electric field area is positioned in the middle section of the equipment body; the hot air protection system is arranged in the negative high-voltage electric field area and protects the electric field insulating porcelain insulator from dewing; the waste heat recovery system traverses the negative high-voltage electric field area; the waste heat utilization system is arranged on the side surface of the equipment body; the discharge port is installed right above the device body.

The device body 2 is arranged on the device base 1 in a welding mode or other fixing modes, and the device base is positioned on a civil engineering foundation on a construction site and fixed by bolts to serve as an installation base of the whole set of system; the lower air chamber 4 is welded at the lower part of the equipment body 2, so that the conventional bolt fastening is avoided (the installation mode often causes the phenomenon that the whole equipment is loosened after being used for a long time through vibration), the bottom of the lower air chamber 4 is used for collecting condensed water and pollutants, the middle part of the lower air chamber 4 is used for allowing smoke to pass through to be treated, the drain pipe 3 is welded at the bottom end of the lower air chamber 4, and when the system runs, the condensed water and the pollutants are settled to the bottom of the lower air chamber 4 through gravity and are drained away through the drain pipe 3; a guide plate 5 is welded on the upper part of the lower air chamber 4, the flue gas to be treated rises to the upper part of the lower air chamber 4 through the middle part of the lower air chamber 4, the guide plate 5 is arranged in a special mode after numerical simulation through the guide plate 5, and the flow state of the flue gas is changed when the flue gas passes through the guide plate 5, so that the flue gas uniformly passes through the area of the guide plate 5; the negative high-voltage electric field area 6, the hot air protection system 7 and the waste heat recovery system 8 are welded and installed in the middle of the equipment body 2 in a coordinated mode, uniform flue gas treated by the guide plate 5 uniformly rises to the negative high-voltage electric field area 6, the hot air protection system 7 forms dewing protection on an insulating porcelain bottle of the negative high-voltage electric field area 6 to prevent the flue gas from dewing, discharging and short-circuiting on the surface of the insulating porcelain bottle, a large amount of ambient air is blown into the waste heat recovery system 8 to indirectly cool the flue gas to be treated, the temperature of the flue gas to be treated is reduced, the evaporation capacity of the flue gas is reduced in the flue gas cooling process, condensed water is separated out from the flue gas, meanwhile, a large amount of charged ions are released in the negative high-voltage electric field area 6 and are combined with particles such as liquid drops and pollutants in the flue gas to move towards a dust collecting, the problems of scaling and low efficiency of the traditional equipment are effectively solved; the waste heat utilization system 9 is welded and installed on the upper section of the negative high-voltage electric field area 6, ambient air in the waste heat recovery system 8 indirectly cools flue gas, the air is heated to the design temperature, the heated ambient air and the flue gas subjected to cooling and electrostatic adsorption treatment are mixed at the discharge port 10 by the waste heat utilization system 9, after the relative water content of the flue gas is reduced, the relative water content of the flue gas is reduced to the design value of an atmosphere dew point curve and then is discharged, ultra-low emission and colored smoke plume treatment are met, and visual pollution is eliminated.

The method of using the electrostatic coalescence and heat exchange system of the present invention comprises the steps of:

step 1, before the static coagulation and heat exchange system is started, starting a hot air protection system 7, and after the temperature of the hot air protection system reaches a designed temperature value and is stable, performing the operation flow of step 2 after the insulation porcelain bottle forms condensation protection;

step 2, opening the lower air chamber, and after the flue gas to be treated enters the electrostatic coagulation and heat exchange system, changing the flow state of the flue gas by a guide plate so that the flue gas uniformly passes through a negative high-voltage electric field area;

step 3, starting a waste heat recovery system, recovering the waste heat of the flue gas, cooling the flue gas and air in a heat and cold exchange manner, and separating out evaporated water in the wet flue gas in the cooling process;

step 4, opening the negative high-voltage electric field area, releasing a large amount of charges in the negative high-voltage discharging process, adsorbing harmful substances in the wet flue gas and pollutants such as precipitated condensate water and the like to move towards the polar plate together in the process that the charges move towards the polar plate in the negative high-voltage electric field area, forming a water film on the polar plate, flowing to the lower air chamber, and discharging through a discharge pipe to achieve the purpose of emission reduction;

and 5, starting the waste heat utilization system, increasing the temperature of ambient air in the process of cooling the flue gas in the waste heat recovery system, reducing the relative humidity of the wet flue gas by the heated ambient air through the waste heat utilization system, ensuring that the wet flue gas does not dew during the cold and heat exchange with the atmosphere in the emission process, and ensuring that the visual pollution of smoke plume is removed.

The existing wet flue gas treatment process can not reach the indexes of ultra-low dust content emission and colored smoke plume elimination of flue gas, and especially the existing environmental protection index can not be realized by using an electrostatic dust removal mode in the ultra-low dust content emission treatment of the flue gas; the prior art device can not effectively collect colored smoke plume during electrostatic collection, and the electrostatic dust collection plate is easy to scale and can not be effectively washed; when the heat exchanger is used for cooling or heating flue gas, soluble salts in the flue gas are precipitated due to the change of the temperature of the flue gas, and the heat exchanger is blocked probably, so that the system cannot run normally.

By adopting the invention, insoluble salt in the flue gas can be effectively removed, and a plurality of soluble salts dissolved in water in the wet flue gas can be removed; according to the integrated design of the electrostatic coagulation and heat exchange system, the heat exchange surface is used as a dust collection plate, the electrostatic collection and heat exchange and the module work simultaneously, wet flue gas passes through the heat exchange and electrostatic working area simultaneously, salt-containing water vapor and solid particles in the flue gas are thoroughly removed, the collected water vapor and the collected solid particles move to the dust collection plate under the action of electric field force to form a liquid film to be discharged, and the problem of blocking and scaling is avoided. The design can solve the problems that the traditional electrostatic dust removal scale is not completely removed, and the heat exchanger is blocked and cannot work normally.

The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any changes or substitutions that can be easily conceived by those skilled in the art within the technical scope of the present invention are included in the scope of the present invention. It will be understood by those of ordinary skill in the art that various changes in form and details may be made therein without departing from the spirit and scope of the present invention as defined by the following claims.