CN210045034U

CN210045034U - Utilize active carbon to carry out exhaust treatment device

Info

Publication number: CN210045034U
Application number: CN201920506938.9U
Authority: CN
Inventors: 椤惧嘲; 顾峰
Original assignee: CHENGDU WAGOTT BIO-TECH Co Ltd
Current assignee: CHENGDU WAGOTT BIO-TECH Co Ltd
Priority date: 2019-04-15
Filing date: 2019-04-15
Publication date: 2020-02-11
Anticipated expiration: 2029-04-15

Abstract

A device for treating waste gas by using activated carbon comprises a chilled water unit, a chilled water tank, a chilled water heat exchanger, a chilled water unit, an induced draft fan, an activated carbon adsorption tank and a solvent recovery tank; the chilled water unit is connected with the chilled water tank through a pipeline; the water inlet of the chilled water heat exchanger is connected with the water outlet of the chilled water tank, and the air inlet of the chilled water heat exchanger is connected with ethyl ester waste gas in a workshop through a pipeline; the air inlet of the refrigerating unit is connected with the air outlet of the chilled water heat exchanger; the air inlet of the activated carbon adsorption tank is connected with the induced air, and the air outlet of the activated carbon adsorption tank is respectively connected with the atmosphere and the solvent recovery tank. In the utility model, the ethyl ester tail gas is liquefied and absorbed for three times through the chilled water heat exchanger, the refrigerating unit and the activated carbon adsorption tank, so that the ethyl ester tail gas treatment efficiency is improved, and the air pollution is reduced; the ethyl ester gas is completely adsorbed by the active carbon and can be desorbed, regenerated and recycled.

Description

Utilize active carbon to carry out exhaust treatment device

Technical Field

The utility model belongs to the technical field of exhaust-gas treatment device, especially, relate to an utilize active carbon to carry out exhaust-gas treatment device.

Background

Ethyl acetate, also known as ethyl acetate propionate, is a colorless transparent liquid with low toxicity, easy volatilization and pungent odor. The fuel is inflammable, and the steam and the air can form an explosive mixture and can cause combustion and explosion when meeting open fire and high heat; the steam can cause drowsiness and vertigo, acute edema can occur after continuous large-amount inhalation, and skin chapping can be caused by long-term contact; sensitive to air, can absorb moisture, and is in acidic reaction after hydrolysis. The waste gas produced in the production process of the chemical industry contains a large amount of ethyl acetate, and if the waste gas is not effectively treated, the waste gas can cause atmospheric pollution and further destroy the atmosphere, and if the waste gas is absorbed in a large amount, the waste gas can cause the health of people.

Disclosure of Invention

The utility model aims to provide an ethyl ester tail gas active carbon integrated processing system has the ethyl acetate waste gas of high rate of recovery, solves ethyl acetate waste gas recovery's problem.

In order to achieve the above object, the utility model adopts the following technical scheme:

a device for treating waste gas by using activated carbon comprises a chilled water unit, a chilled water tank, a chilled water heat exchanger, a chilled water unit, an induced draft fan, an activated carbon adsorption tank and a solvent recovery tank; the chilled water unit is connected with the chilled water tank through a pipeline, and cools hot water after the liquefied ethyl ester tail gas and conveys cooling water into the chilled water tank; the cooling water delivered by the freezing water tank is used for liquefying the ethyl ester tail gas and then indirectly delivering the ethyl ester tail gas to a freezing water unit for cooling, the air inlet of the freezing water heat exchanger is connected with the ethyl ester waste gas in a workshop through a pipeline, and the freezing water heat exchanger is used for liquefying the ethyl ester gas for the first time to absorb a large amount of the ethyl ester gas; the gas inlet of the refrigerating unit is connected with the gas outlet of the chilled water heat exchanger, and the gas subjected to primary liquefaction is subjected to secondary liquefaction in the refrigerating unit; the induced draft fan is connected with the refrigerating unit through a pipeline, the induced draft fan generates negative pressure through rotation of the impeller to extract tail gas in the refrigerating unit, an air inlet of the activated carbon adsorption tank is connected with the induced draft fan, the induced draft fan conveys the extracted ethyl ester tail gas into the activated carbon adsorption tank, an air outlet of the activated carbon adsorption tank is respectively connected with the atmosphere and the solvent recovery tank, an air outlet of the activated carbon adsorption tank is favorable for discharging the purified ethyl ester tail gas, and the solvent recovery tank is favorable for collecting ethyl ester gas desorbed from saturated activated carbon when the activated carbon is desorbed and regenerated; the active carbon adsorption box consists of an active carbon adsorption tower and an active carbon adsorption and desorption system, the active carbon adsorption and desorption system collects ethyl ester tail gas extracted from an induced draft fan, a flow measurement blower is arranged in the active carbon adsorption and desorption system, and the flow measurement blower eccentrically runs by depending on a stator in a cylinder, so that solvent change gas between Chinese blades of a rotor groove sucks the ethyl ester tail gas, the gas in the tail gas collection box is kept not to flow back, and the tail gas is sucked to a gas inlet valve port; the bottom of the activated carbon adsorption tower is provided with a spiral plate heat exchanger with two spiral channels made of two parallel metal plates, and when the activated carbon adsorption tower is subjected to desorption, the spiral plate heat exchanger heats the activated carbon adsorption tower and enables activated carbon to be subjected to desorption regeneration; the activated carbon adsorption tower is sequentially provided with a bearing layer and an activated carbon layer from bottom to top, and is a purification device with the best effect of absorbing organic waste gas by utilizing the characteristics of developed gaps and large specific surface area of activated carbon, the device is designed for fully-closed automatic control operation, and the operation is simple and safe; the bearing layer and the activated carbon layer are provided with maintenance visual windows, so that the adsorption and desorption conditions of the activated carbon and the internal drying condition can be observed; the supporting layer of the activated carbon adsorption tower is provided with an air inlet valve, and in the adsorption process, the air inlet valve is opened to enable tail gas to carry out the activated carbon layer; an exhaust valve is arranged at the top of the activated carbon adsorption tower, and the gas purified by the activated carbon in the tail gas is directly discharged as the atmosphere; a connecting port matched with the solvent recovery tank is formed in the side edge of the activated carbon layer, and gas generated in the desorption process is conveyed into the condensing pipe when the activated carbon is desorbed; the activated carbon adsorption tower is provided with a matched activated carbon feeding device, so that activated carbon materials can be conveniently introduced into the activated carbon adsorption tower during the first use of the device.

Preferably, the chilled water unit consists of a Freon compressor, an evaporator, a condenser and an expansion valve, the air-cooled screw water chilling unit adopts a double-oil corrugated water aluminum foil, a fin type air-cooled condenser and an inlet PLC (programmable logic controller), a large screen touch screen is configured in the human-computer field, the interface is simple and elegant, and the operation is visual and simple. The low-temperature low-pressure refrigerant gas after evaporation and refrigeration is sucked by a Freon compressor at the beginning of the chilled water unit and then compressed into high-temperature high-pressure gas to be sent to a condenser; the high-pressure high-temperature gas is cooled by a condenser and then is condensed into normal-temperature high-pressure liquid, when the normal-temperature high-pressure liquid flows into a thermostatic expansion valve, the normal-temperature high-pressure liquid is throttled into low-temperature low-pressure wet steam, and the wet steam flows into a shell-and-tube evaporator to absorb the heat of the chilled water in the evaporator so as to lower the temperature of the water; the evaporated refrigerant is sucked back into the compressor, and the refrigeration cycle is repeated; the chilled water unit cools and processes the recovered hot water through absorption type refrigeration circulation and conveys the hot water into the chilled water tank, and the chilled water unit is provided with a reliable safety protection device.

Preferably, the freezing water tank is the supporting constant temperature water tank of refrigerated water unit compression condensing engine, and the freezing water tank passes through the oral siphon and is connected with the refrigerated water unit, and the freezing water tank mainly saves the refrigerated water that the refrigerated water unit carried and comes to keep a constant temperature state, guarantee to carry the water that carries in the refrigerated water heat exchanger to the water of low temperature liquefiable gas.

Preferably, the chilled water heat exchanger is a shell-and-tube heat exchanger consisting of a shell, tube bundles, tube plates and baffle plates, the shell is circular, the tube bundles are arranged in the shell, two ends of the tube bundles are fixed on the tube plates, heat exchange is carried out on two fluids with different temperatures, the heat is transferred to the fluid with lower temperature from the fluid with higher temperature, the liquefied gas reaches indexes specified by a required flow path, and a plurality of baffle plates are usually arranged in the shell to improve the heat transfer coefficient outside the tube and improve the fluid speed of a shell layer. The water inlet of the chilled water heat exchanger is arranged at the bottom of the chilled water heat exchanger; the chilled water heat exchanger delivery port sets up at the chilled water heat exchanger top, and the water among the chilled water heat exchanger is the direction circulation flow from the bottom up, sets up from the bottom up and flows in order to make cold water and ethyl ester tail gas area of contact bigger, and contact time is longer, makes the ethyl ester tail gas liquefy to heat exchange efficiency has been improved.

Preferably, the refrigerating unit consists of a semi-closed screw compressor, a water-cooled condenser, a filter, a liquid path control valve, an electronic expansion valve, a dry evaporator and an electrical control system, the mechanical equipment for low-temperature refrigeration is realized by changing the pressure change of cold gas through the compressor, and when tail gas passes through the refrigerating unit, the tail gas is cooled to be below the dew point temperature, and ethyl ester gas in the tail gas is condensed into ethyl ester liquid. The refrigerating unit and the chilled water heat exchanger are connected through the collecting tank, the air inlet of the refrigerating unit is connected with the air outlet of the collecting tank, and the collecting tank is mainly used for collecting ethyl ester liquid obtained after the ethyl ester tail gas is liquefied for the first time and the second time, so that the ethyl ester liquid is collected in a centralized manner.

Preferably, the solvent recovery tank is provided with a condenser pipe and a liquid recovery tank from top to bottom, the liquid recovery tank is of a horizontal cylinder device structure, the condenser pipe mainly adopts a heat exchange principle to condense and condense the ethyl ester gas desorbed from the activated carbon into ethyl ester liquid, and the ethyl ester liquid is collected into the liquid recovery tank; the condenser pipe comprises stainless steel material, and the ethyl ester liquid prevents that the condenser pipe from being corroded if corrosive medium liquid, adopts stainless steel material, and the liquid recovery jar passes through the pipeline and is connected with ethyl ester liquid pump.

Preferably, the induced draft fan is composed of a casing, impellers, an air inlet box, an air inlet, a transmission part and an adjusting door, when the impellers of the induced draft fan are driven by the motor to rotate, the air filled between the impellers is thrown out of the impellers under the action of centrifugal force and enters the casing, the space at the inlet of the impellers is vacuum due to the outflow of the air, the external air is fully automatically supplemented into the air inlet of the impellers, the energy obtained in the rotation is discharged from the outlet of the impellers, and the air is sucked and extruded to form continuous flow of the air as the motor does not stop working; the opening degree of the blades of the door is adjusted through the adjusting baffle, so that the operating working condition point of the fan can be changed, and the overall efficiency of the fan is improved; the draught fan is arranged at the tail end of the refrigerating unit and at the bottom of the activated carbon adsorption box.

Preferably, the ethyl ester liquid outlet pump is composed of an impeller, a pump body, a pump shaft and a pump bearing, and is a centrifugal pump which is used for conveying liquid by generating centrifugal force when the impeller rotates, can be suspended in various controls and can ensure that the liquid outflow quantity is kept uniform, is small in vibration and stable in cloud shape, is convenient for recovering liquid, and is respectively connected with a chilled water heat exchanger, a freezing unit and a liquid outlet of a solvent recovery tank through pipelines.

To sum up, the beneficial effects of the utility model are that:

1. the utility model discloses well ethyl ester tail gas passes through refrigerated water heat exchanger, refrigerating unit, activated carbon adsorption case cubic liquefaction and absorbs, makes the ethyl ester in the tail gas absorb as far as completely. Greatly reduces the content of ethyl ester tail gas in the atmosphere and reduces air pollution.

2. The utility model discloses system's equipment security is good, and is with low costs, easy operation.

3. The utility model discloses an active carbon adsorbs completely and can carry out desorption regeneration cyclic utilization to the ethyl ester gas. Can be circularly and repeatedly operated for a long time.

Drawings

Fig. 1 is a schematic structural view of the present invention;

FIG. 2 is a schematic view of the structure of the activated carbon adsorption tank of the present invention;

in the figure, 1, a chilled water unit; 2. a freezing water tank; 3. a chilled water heat exchanger; 4. a collection tank; 5. an ethyl ester liquid outlet pump; 6. a refrigerating unit; 7. an induced draft fan; 8. an activated carbon adsorption and desorption system; 9. a solvent recovery tank; 10. An air outlet of the active carbon adsorption and desorption system; 11. a condenser tube; 12. an activated carbon adsorption tank; 13. an exhaust valve; 14. An intake valve; 15. overhauling the visible window; 16. a support layer; 17. an activated carbon layer; 18. an active carbon feeding device; 19. a flow measuring blower; 20. an activated carbon adsorption tower.

Detailed Description

The technical solution in the embodiments of the present invention will be clearly and completely described below with reference to fig. 1 of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

Referring to fig. 1, a device for treating waste gas by using activated carbon comprises a chilled water unit 1, a chilled water tank 2, a chilled water heat exchanger 3, a chiller unit 6, an induced draft fan 7, an activated carbon adsorption tank 12 and a solvent recovery tank 9; the chilled water unit 1 is connected with the chilled water tank 2 through a pipeline, the chilled water unit 1 cools hot water after the liquefied ethyl ester tail gas, and the chilled water unit conveys cooling water into the chilled water tank 2; the water inlet of the chilled water heat exchanger 3 is connected with the water outlet of the chilled water tank 2, the water outlet of the chilled water heat exchanger 3 is connected with the water inlet of the chilled water tank 2, cooling water conveyed by the chilled water tank 2 liquefies ethyl ester tail gas and then indirectly conveys the ethyl ester tail gas to the chilled water unit 1 for cooling, the air inlet of the chilled water heat exchanger 3 is connected with ethyl ester waste gas in a workshop through a pipeline, and the chilled water heat exchanger 3 liquefies ethyl ester gas for the first time and absorbs a large amount of ethyl ester gas; the air inlet of the refrigerating unit 6 is connected with the air outlet of the chilled water heat exchanger 3, and the gas subjected to primary liquefaction is subjected to secondary liquefaction in the refrigerating unit 6; the induced draft fan 7 is connected with the refrigerating unit 6 through a pipeline, the induced draft fan 7 generates negative pressure through rotation of an impeller to extract tail gas in the refrigerating unit 6, an air inlet of the activated carbon adsorption box 12 is connected with the induced draft fan 7, the induced draft fan 7 conveys the extracted ethyl ester tail gas into the activated carbon adsorption box 12, an air outlet of the activated carbon adsorption box 12 is respectively connected with the atmosphere and the solvent recovery tank 9, an air outlet of the activated carbon adsorption box 12 is favorable for emission of the purified ethyl ester tail gas, and the solvent recovery tank 9 is favorable for collecting the ethyl ester gas desorbed from the saturated activated carbon when the activated carbon is subjected to desorption and regeneration; referring to fig. 2, the activated carbon adsorption tank 12 is composed of an activated carbon adsorption tower 20 and an activated carbon adsorption desorption system 8, the activated carbon adsorption desorption system 8 collects ethyl ester tail gas extracted from an induced draft fan, a flow measurement blower 19 is arranged inside the activated carbon adsorption desorption system 8, the flow measurement blower 19 eccentrically runs by means of a stator inside a cylinder, solvent change gas between Chinese blades of a rotor groove sucks the ethyl ester tail gas, gas in the tail gas collection tank 9 is kept not to flow back, and the tail gas is sucked into the gas inlet valve port 14; the bottom of the activated carbon adsorption tower 20 is provided with a spiral plate heat exchanger with two spiral channels made of two parallel metal plates, and when the activated carbon adsorption tower is subjected to desorption, the spiral plate heat exchanger heats the activated carbon adsorption tower and enables activated carbon to be subjected to desorption regeneration; the activated carbon adsorption tower 20 is sequentially provided with a bearing layer 16 and an activated carbon layer 17 from bottom to top, and is a purification device with the best effect of absorbing organic waste gas by utilizing the characteristics of developed gaps, large specific surface area and high adsorption capacity of activated carbon, and the device is designed for fully-closed automatic control operation, and is simple and safe to operate; the supporting layer 16 and the activated carbon layer 17 are both provided with maintenance visual windows 15, so that the adsorption and desorption conditions of the activated carbon and the internal drying condition can be observed; the supporting layer of the activated carbon adsorption tower is provided with an air inlet valve 14, and in the adsorption process, the air inlet valve is opened to enable tail gas to pass through an activated carbon layer 17; an exhaust valve is arranged at the top of the activated carbon adsorption tower, and the gas purified by the activated carbon in the tail gas is directly discharged as the atmosphere; a connecting port 10 matched with the solvent recovery tank 9 is formed in the side edge of the activated carbon layer 17, and gas generated in the desorption process is conveyed into the condensing pipe 11 when the activated carbon is desorbed; the activated carbon adsorption tower 20 is provided with a matched activated carbon feeding device 18, so that activated carbon materials can be conveniently introduced into the activated carbon adsorption tower 20 when the device is used for the first time.

The working principle of the embodiment is briefly described as follows:

the scheme is that cold water in a freezing water tank is directly conveyed to a freezing heat exchanger, the freezing heat exchanger is energy-saving equipment for realizing heat transfer between materials between two or more than two fluids at different temperatures, and ethyl ester tail gas in a workshop discharged can be directly liquefied for the first time in a heat energy exchange mode. And outputting the liquefied hot water to a chilled water unit, cooling the conveyed hot water through heat absorption refrigeration cycle, conveying cold water into a chilled water tank, and refrigerating and recycling the water for multiple times. The heat transfer between two kinds of different temperature fluids of ethyl ester tail gas process chilled water heat exchanger carries out the liquefaction for the first time to the ethyl ester tail gas in the workshop, the ethyl ester liquid after the liquefaction flows into and collects in the holding vessel, the ethyl ester tail gas that remains unliquefied lets in and carries out the liquefaction for the second time in the middle of the refrigerating unit, the ethyl ester liquid after the liquefaction for the second time is collected through the holding vessel, the draught fan passes through the impeller and produces the negative pressure, extract the tail gas after the unliquefied for the second time from the refrigerating unit, and pass through the admission valve with the ethyl ester tail gas of extraction and carry in the active carbon adsorption box, because of the active carbon has flourishing space, specific surface is big, the active carbon adsorption box can absorb completely the ethyl ester gas in the remaining tail gas, the. When the ethyl ester is absorbed by the activated carbon in the activated carbon adsorption tank to reach a saturated state, the air inlet valve and the air outlet valve are closed, and the air inlet of the condensation pipe is opened, because the adsorption quantity of the ethyl ester is reduced along with the increase of the temperature, the activated carbon is heated at high temperature through the spiral plate heat exchanger, the temperature of the activated carbon adsorbent is high, the adsorbed ethyl ester can be desorbed, and the activated carbon is regenerated to be recycled. And (3) inputting the gas generated after the temperature is raised into a condensing tube, condensing the hot ethyl ester gas into liquid when meeting cold water by utilizing a heat exchange principle, and directly collecting the condensed ethyl ester liquid into a solvent recovery tank and a collection tank. After the desorption work of the activated carbon tower with saturated adsorption is finished, the exhaust valve and the air inlet valve are opened, the air inlet of the condensation pipe is closed, and the ethyl ester tail gas is adsorbed for the second time, so that the activated carbon is repeatedly utilized for many times, the operation is simple, and the cost is saved. Under the action of centrifugal force, liquid is thrown from the center of the impeller to the outer edge to obtain energy, and leaves the outer edge of the impeller at high speed to enter the volute pump casing. In the volute, the liquid is decelerated due to the gradual expansion of the flow passage, part of kinetic energy is converted into static pressure energy, and finally the static pressure energy flows into the discharge pipeline at higher pressure to extract the ethyl ester liquid. After the ethyl ester gas in the ethyl ester tail gas is liquefied for three times by the tail gas comprehensive treatment system, the ethyl ester gas can be simply and efficiently recovered.

Preferably, the chilled water unit 1 consists of a Freon compressor, an evaporator, a condenser and an expansion valve, is an air-cooled screw water chilling unit adopting a double-oil corrugated water aluminum foil, a fin type air-cooled condenser and an inlet PLC (programmable logic controller), is provided with a large screen touch screen in the human-computer field, and has simple and elegant interface and visual and simple operation. The low-temperature low-pressure refrigerant gas after evaporation and refrigeration is sucked by a Freon compressor at the beginning of the chilled water unit 1 and then compressed into high-temperature high-pressure gas to be sent to a condenser; the high-pressure high-temperature gas is cooled by a condenser and then is condensed into normal-temperature high-pressure liquid, when the normal-temperature high-pressure liquid flows into a thermostatic expansion valve, the normal-temperature high-pressure liquid is throttled into low-temperature low-pressure wet steam, and the wet steam flows into a shell-and-tube evaporator to absorb the heat of the chilled water in the evaporator so as to lower the temperature of the water; the evaporated refrigerant is sucked back into the compressor, and the refrigeration cycle is repeated; the chilled water unit 1 cools and processes recovered hot water through absorption refrigeration cycle, and conveys the recovered hot water to the chilled water tank 2, and the chilled water unit has a reliable safety protection device.

Preferably, the freezing water tank 2 is the supporting constant temperature water tank of refrigerated water unit compression condensing engine, and freezing water tank 2 is connected with refrigerated water unit 1 through the oral siphon, and the cooling water that refrigerated water unit 1 was carried to the main mistake of freezing water tank 2 carries to keep a constant temperature state, guarantee to carry the water of carrying in the refrigerated water heat exchanger 3 for the water of low temperature liquefiable gas.

Preferably, the chilled water heat exchanger 3 is a shell-and-tube heat exchanger composed of a shell, tube bundles, tube plates and baffle plates, the shell is circular, the tube bundles are arranged in the shell, two ends of the tube bundles are fixed on the tube plates, heat exchange is carried out on two fluids with different temperatures, heat is transferred from the fluid with higher temperature to the fluid with lower temperature, liquefied gas reaches indexes specified by a required flow, and a plurality of baffle plates are usually arranged in the shell to improve the heat transfer coefficient outside the tube and improve the fluid speed of a shell layer. The water inlet of the chilled water heat exchanger 3 is arranged at the bottom of the chilled water heat exchanger 3; the water outlet of the chilled water heat exchanger 3 is arranged at the top of the chilled water heat exchanger 3, water in the chilled water heat exchanger 3 flows circularly in the direction from bottom to top, and the flow from bottom to top is set to enable the contact area of cold water and the tail gas of the ethyl ester to be larger, so that the contact time is longer, the tail gas of the ethyl ester is enabled to be liquefied, and the heat exchange efficiency is improved.

Preferably, the refrigerating unit 6 comprises a semi-closed screw compressor, a water-cooled condenser, a filter, a liquid path control valve, an electronic expansion valve, a dry evaporator and an electrical control system, the mechanical equipment for achieving low-temperature refrigeration by changing pressure change of cold gas through the compressor is used, when tail gas passes through the refrigerating unit 6, the tail gas is cooled to be below dew point temperature, and ethyl ester gas in the tail gas is condensed into ethyl ester liquid. The refrigerating unit and the chilled water heat exchanger 3 are connected through the collecting tank 4, the air inlet of the refrigerating unit 6 is connected with the air outlet of the collecting tank 4, and the collecting tank is mainly used for collecting ethyl ester liquid after the ethyl ester tail gas is liquefied for the first time and the second time, so that the ethyl ester liquid is collected in a centralized manner.

Preferably, the solvent recovery tank 9 is provided with a condenser tube 11 and a liquid recovery tank 9 from top to bottom, the liquid recovery tank is of a horizontal cylinder device structure, and the condenser tube 11 mainly adopts a heat exchange principle to condense and condense the ethyl ester gas desorbed from the activated carbon into ethyl ester liquid which is collected in the liquid recovery tank; the condenser pipe 11 comprises stainless steel material, and the ethyl ester liquid is if corrosive medium liquid, prevents that the condenser pipe from being corroded, adopts stainless steel material, and liquid recovery tank 9 passes through the pipeline and is connected with ethyl ester liquid pump 5.

Preferably, the induced draft fan 7 is composed of a casing, impellers, an air inlet box, an air inlet, a transmission part and an adjusting door, when the impellers of the induced draft fan 7 are driven by a motor to rotate, air filled between the impellers is thrown out of the impellers under the action of centrifugal force and enters the casing, the space at the inlet of the impellers is vacuum due to the outflow of the air, external air is fully automatically supplemented into the air inlet of the impellers, energy is obtained in the rotation and is discharged from the outlet of the impellers, and the air is sucked and extruded to form continuous flow of the air as the motor does not stop working; the opening degree of the blades of the door is adjusted through the adjusting baffle, so that the operating working condition point of the fan can be changed, and the overall efficiency of the fan is improved; the draught fan is arranged at the tail end of the refrigerating unit 6 and at the bottom of the activated carbon adsorption box.

Preferably, the ethyl ester liquid outlet pump 5 is composed of an impeller, a pump body, a pump shaft and a pump bearing, the centrifugal pump is used for conveying liquid by generating centrifugal force when the impeller rotates, multiple controls can be suspended, the liquid outflow can be kept uniform, vibration is small, cloud is stable, liquid can be conveniently recovered, and the ethyl ester liquid outlet pump 5 is respectively connected with the liquid outlets of the chilled water heat exchanger 3, the refrigerating unit 6 and the solvent recovery tank 9 through pipelines.

In the description of the present invention, it should be understood that the terms "counterclockwise", "clockwise", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience of description of the present invention, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore, should not be construed as limiting the present invention.

Claims

1. The utility model provides an utilize active carbon to carry out exhaust treatment device which characterized in that: comprises a chilled water unit (1), a chilled water tank (2), a chilled water heat exchanger (3), a chiller unit (6), an induced draft fan (7), an activated carbon adsorption tank (12) and a solvent recovery tank (9); the chilled water unit (1) is connected with the chilled water tank (2) through a pipeline; the water inlet of the chilled water heat exchanger (3) is connected with the water outlet of the chilled water tank (2), the water outlet of the chilled water heat exchanger (3) is connected with the water inlet of the chilled water tank (2), and the air inlet of the chilled water heat exchanger (3) is connected with ethyl ester waste gas in a workshop through a pipeline; the air inlet of the refrigerating unit (6) is connected with the air outlet of the chilled water heat exchanger (3); the induced draft fan (7) is connected with the refrigerating unit (6) through a pipeline; the air inlet of the activated carbon adsorption box (12) is connected with the induced draft fan (7), and the air outlet of the activated carbon adsorption box (12) is respectively connected with the atmosphere and the solvent recovery tank (9); the activated carbon adsorption tank (12) consists of an activated carbon adsorption tower (20) and an activated carbon adsorption and desorption system (8), and a flow measurement blower (19) is arranged in the activated carbon adsorption and desorption system (8) and sucks tail gas into an air inlet valve port; the bottom of the active carbon adsorption tower (20) is provided with a spiral plate heat exchanger with two spiral channels made of two parallel metal plates; the activated carbon adsorption tower (20) is sequentially provided with a bearing layer (16) and an activated carbon layer (17) from bottom to top; the supporting layer (16) and the activated carbon layer (17) are both provided with maintenance visual windows (15); the supporting layer of the activated carbon adsorption tower is provided with an air inlet valve (14); an exhaust valve is arranged at the top of the activated carbon adsorption tower; a connecting port (10) matched with the solvent recovery tank (9) is formed in the side edge of the activated carbon layer (17); the activated carbon adsorption tower (20) is provided with a matched activated carbon feeding device (18).

2. The apparatus for treating exhaust gas using activated carbon according to claim 1, wherein: the chilled water unit (1) consists of a Freon compressor, an evaporator, a condenser and an expansion valve, and is an air-cooled screw water chilling unit adopting double-oil corrugated water aluminum foils, a fin type air-cooled condenser and an inlet PLC (programmable logic controller).

3. The apparatus for treating exhaust gas using activated carbon according to claim 2, wherein: the freezing water tank (2) is a constant-temperature water tank matched with a freezing water unit compression condenser, and the freezing water tank (2) is connected with the freezing water unit (1) through a water inlet pipe.

4. The apparatus for treating exhaust gas using activated carbon according to claim 2, wherein: the chilled water heat exchanger (3) is a shell-and-tube heat exchanger consisting of a shell, tube bundles, tube plates and baffle plates, parallel tube bundles or spiral tubes are arranged in the shell, and a water inlet of the chilled water heat exchanger (3) is arranged at the bottom of the chilled water heat exchanger (3); the water outlet of the chilled water heat exchanger (3) is arranged at the top of the chilled water heat exchanger (3), and water in the chilled water heat exchanger (3) flows circularly in the direction from bottom to top.

5. The apparatus for treating exhaust gas using activated carbon according to claim 1, wherein: the refrigerating unit (6) is composed of a semi-closed screw compressor, a water-cooled condenser, a filter, a liquid path control valve, an electronic expansion valve, a dry evaporator and an electrical control system, the refrigerating unit and the chilled water heat exchanger (3) are connected through a collecting tank (4), and an air inlet of the refrigerating unit (6) is connected with an air outlet of the collecting tank (4).

6. The apparatus for treating exhaust gas using activated carbon according to claim 1, wherein: the solvent recovery tank (9) is provided with a condensing pipe (11) and a liquid recovery tank from top to bottom, and the liquid recovery tank is of a horizontal cylinder device structure; the condensation pipe (11) is made of stainless steel, and the liquid recovery tank is connected with the ethyl ester liquid outlet pump (5) through a pipeline.

7. The apparatus for treating exhaust gas using activated carbon according to claim 1, wherein: draught fan (7) comprise casing, impeller, inlet box, air intake, drive division, governing door, the draught fan is installed in refrigerating unit (6) tail end, active carbon adsorption bottom of the case portion.

8. The apparatus for treating exhaust gas using activated carbon according to claim 6, wherein: the ethyl ester liquid outlet pump (5) is a centrifugal pump which consists of an impeller, a pump body, a pump shaft and a pump bearing and conveys liquid by generating centrifugal force when the impeller rotates; the ethyl ester liquid outlet pump (5) is respectively connected with the liquid outlets of the chilled water heat exchanger (3), the refrigerating unit (6) and the solvent recovery tank (9) through pipelines.