CN218924241U

CN218924241U - Coating line exhaust gas purification processing system

Info

Publication number: CN218924241U
Application number: CN202223546679.3U
Authority: CN
Inventors: 刘永华; 唐其军; 朱文康
Original assignee: Guangdong Kaierjing Environmental Protection Engineering Co ltd
Current assignee: Guangdong Kaierjing Environmental Protection Engineering Co ltd
Priority date: 2022-12-27
Filing date: 2022-12-27
Publication date: 2023-04-28
Anticipated expiration: 2032-12-27

Abstract

The utility model relates to the technical field of paint mist waste gas purification treatment facilities, and discloses a coating line waste gas purification treatment system which comprises a dry filter, an activated carbon adsorber, an RCO catalytic combustion device, an exhaust smoke bin and an adsorption fan, wherein the dry filter is connected with the activated carbon adsorber and sends waste gas to the activated carbon adsorber under the suction of the adsorption fan, the activated carbon adsorber is connected with the exhaust smoke bin and discharges purified gas through the smoke bin, a temperature sensor I and a nitrogen spray head I are arranged in the activated carbon adsorber, the nitrogen spray head I is connected with a nitrogen making unit through a nitrogen pipe I, the nitrogen pipe I is provided with a pneumatic valve I, the nitrogen making unit is connected with a compressed air tank, and the temperature sensor I is in control connection with the nitrogen making unit and the pneumatic valve I; if the desorption temperature is too high in the desorption link, the active carbon absorber and/or the catalytic combustion device is cooled by the nitrogen protection device, so that the operation safety of equipment can be ensured, and the production safety accident is avoided.

Description

Coating line exhaust gas purification processing system

Technical Field

The utility model relates to the technical field of paint mist waste gas purification treatment facilities, in particular to a waste gas purification treatment system adopting active carbon adsorption concentration and catalytic combustion combined purification treatment.

Background

The main component of the paint used in the production of the coating lines of the manufacturing enterprises such as the automobile aluminum wheel decorative covers, nameplates and the like is PU paint, PE paint, colored paint, water paint and other resin paint and the like, and the organic solvent is tenna water. The low-toxicity paint mist waste gas generated in the operation process of the coating line can be absorbed through respiratory tracts, skin and digestive tracts, if the low-toxicity paint mist waste gas is not treated, harmful gas is diffused everywhere along with the air flow, and workers and nearby residents in indoor operation inevitably enter the human body through the breathing action of the human body, so that the human body health is endangered, and the indoor environment of the plant and the living environment of surrounding residents are influenced.

At present, an adsorption concentration-heat accumulating type catalytic combustion device is adopted for treating the waste gas, and as disclosed in Chinese patent publication No. CN210448608, the activated carbon is regenerated by desorbing organic matters from the activated carbon through the adsorption action of an activated carbon adsorber and hot air flow after the activated carbon is adsorbed and saturated; the desorbed organic matter is concentrated (the concentration is increased by tens times than the original concentration) and sent to a catalytic combustion chamber for catalytic combustion into carbon dioxide and water vapor to be discharged. In the desorption process of the activated carbon adsorber, the desorption temperature of the desorbed activated carbon molecular sieve needs to be kept stable at 150-250 ℃ to ensure the safety of the activated carbon adsorber and the heat accumulating type catalytic combustion device, and the existing adsorption concentration-heat accumulating type catalytic combustion device lacks monitoring of the temperature of the desorbed gas in a desorption link, so that safety accidents or faults such as explosion and equipment operation of the activated carbon adsorber and the heat accumulating type catalytic combustion device can be caused when the desorption temperature is too high.

Disclosure of Invention

Aiming at the defects of the prior art, the utility model aims to provide a coating line waste gas purification treatment system which is provided with a nitrogen protection device, and the active carbon absorber and/or the catalytic combustion device is cooled by the nitrogen protection device in the desorption link if the desorption temperature is too high, so that the equipment operation safety can be ensured, and the production safety accident is avoided.

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

the utility model provides a coating line exhaust purification treatment system, including dry filter, the active carbon adsorber, RCO catalytic combustion device, exhaust smoke storehouse and adsorption fan, dry filter connects the active carbon adsorber and sends into waste gas to the active carbon adsorber under the suction of adsorption fan, the active carbon adsorber connects the exhaust smoke storehouse and discharges the gas of purification through the smoke storehouse, dry filter, the active carbon adsorber, exhaust smoke storehouse and adsorption fan pass through the adsorption piping connection, be located the air inlet end of active carbon adsorber on the adsorption piping, the pneumatic valve V is installed respectively to the end of giving vent to anger, RCO catalytic combustion device passes through desorption pipeline connection active carbon adsorber and exhaust smoke storehouse, be equipped with temperature sensor I in the active carbon adsorber and install nitrogen shower nozzle I, nitrogen shower nozzle I passes through nitrogen pipe I and connects the nitrogen making unit, nitrogen pipe I disposes pneumatic valve I, nitrogen making unit connects compressed air jar, temperature sensor I and nitrogen making unit, pneumatic valve I control connection; in the desorption link, monitor the desorption temperature in the active carbon adsorber by temperature sensor I and when the unusual circumstances such as desorption temperature appears too high, transmit signal control nitrogen making unit work, fill nitrogen gas cooling in to the active carbon adsorber through nitrogen pipe I, play the cooling guard action to the active carbon adsorber.

As an improvement scheme, the RCO catalytic combustion device is connected with an off-line desorption box, a temperature sensor II is arranged in the off-line desorption box, a nitrogen spray head II is arranged in the off-line desorption box, the nitrogen spray head II is connected with a nitrogen making unit through a nitrogen pipe II, the nitrogen pipe II is provided with a pneumatic valve II, and the temperature sensor II is in control connection with the nitrogen making unit and the pneumatic valve II; the off-line desorption box can increase the circulating catalytic combustion of the desorbed organic matters and has a buffer effect on the desorbed organic matters fed into the catalytic combustion device, so that the catalytic combustion efficiency of the desorbed organic matters in the desorption link is further improved, and the catalytic combustion of the desorbed organic matters is more sufficient; and the temperature sensor II monitors the desorption temperature in the off-line desorption box, controls the nitrogen generator set to work when the temperature is abnormal, and fills nitrogen into the off-line desorption box through the nitrogen pipe II and the nitrogen spray head II for cooling, thereby playing a role in protecting the RCO catalytic combustion device.

Preferably, the RCO catalytic combustion device is internally provided with a desorption fan, the desorption pipeline comprises a desorption air outlet pipe connected between the desorption fan and the activated carbon adsorber, a pneumatic valve III is arranged on the desorption air outlet pipe, and a pneumatic valve IV is arranged on the desorption air inlet pipe and the desorption air inlet pipe connected between an exhaust port of the RCO catalytic combustion device and the activated carbon adsorber; after the adsorption saturation of the activated carbon molecular sieve in the activated carbon adsorber, closing a pneumatic valve V on an adsorption pipeline, opening a pneumatic valve III and a pneumatic valve IV on a desorption pipeline, enabling hot air flow to remove organic matters under the action of a desorption fan, sending the hot air flow into an RCO catalytic combustion device for catalytic combustion, directly exhausting one part of desorption high-temperature gas through an exhaust smoke bin, and sending the other part of desorption high-temperature gas into the activated carbon adsorber for desorption of activated carbon.

The utility model has the following beneficial effects:

the coating line waste gas purification treatment system is provided with the nitrogen protection device, and the active carbon absorber and/or the catalytic combustion device is cooled by the nitrogen protection device if the desorption temperature is too high in the desorption link, so that the equipment operation safety can be ensured, and the production safety accident is avoided.

Drawings

FIG. 1 is a schematic elevation view of a coating line exhaust gas purifying system according to the present utility model;

FIG. 2 is a schematic top view of the coating line exhaust gas purifying system of the present utility model;

FIG. 3 is a simplified schematic diagram of a coating line exhaust gas purification treatment system according to the present utility model;

FIG. 4 is a schematic view of an RCO catalytic combustion device of the coating line exhaust gas purifying treatment system of the present utility model.

Detailed Description

The present utility model will be further described with reference to the accompanying drawings and specific embodiments so as to more clearly understand the technical ideas claimed in the present utility model.

The coating line waste gas purification treatment system as shown in fig. 1-4 comprises a spray absorption tower 1, a dry filter 2, an activated carbon adsorber 3, an RCO catalytic combustion device 4, an exhaust smoke bin 5 and an adsorption fan 6, wherein the spray absorption tower 1 is arranged at the front end of the dry filter 2, a waste gas suction inlet 11 is arranged at the lower part of the spray absorption tower 1, one end of a pipeline is connected to the top of the spray absorption tower 1, the other end of the pipeline is connected to the dry filter 2 to communicate the spray absorption tower 1 with the dry filter 2, a spray system 12 is arranged in the spray absorption tower 1, a frame or net type packing layer 13 is arranged corresponding to the spray system 12, a dehydration packing layer 14 is arranged in the spray absorption tower 1, and the dehydration packing layer 14 is a blocky honeycomb inclined pipe or a corrugated inclined pipe. The bottom of the spray absorption tower 1 is provided with a liquid storage tank 15, the liquid storage tank 15 is connected with a spray system 12 through a pump 16 and a pump pipeline, the liquid storage tank 15 is connected with a water inlet pipe 17 and a water outlet pipe 18, waste gas flow enters from a lower waste gas suction inlet 11, the spray system 12 generates mist spray, sprayed absorption liquid is uniformly distributed along all surfaces of a frame or net packing layer 13 in the downward flowing process, a uniform liquid film is formed on the surface, the vertical design of the tower enables paint remover alkaline aqueous solution and bottom-up gas to flow oppositely, the paint remover alkaline aqueous solution and the bottom-up gas are well contacted and reacted, paint mist, dimethylbenzene, benzene and other pollutants in the gas flow are absorbed into the liquid storage tank 15 by the alkaline solution, and the waste gas flow subjected to spray filtration treatment is led into the dry filter 2 through a tower top pipeline.

The dry filter 2 is connected with the activated carbon absorber 3 and sends waste gas to the activated carbon absorber 3 under the suction of the adsorption blower 6, the activated carbon absorber 3 is connected with the exhaust smoke bin 5 and discharges purified gas through the smoke bin, the dry filter 2, the activated carbon absorber 3, the exhaust smoke bin 5 and the adsorption blower 6 are connected through an adsorption pipeline 7, the adsorption blower 6 can be an adsorption pipeline section connected between the activated carbon absorber 3 and the exhaust smoke bin 5 or an adsorption pipeline section connected between the activated carbon absorber 3 and the dry filter 2, a pneumatic valve V is respectively arranged at the air inlet end and the air outlet end of the activated carbon absorber 3 on the adsorption pipeline 7, the RCO catalytic combustion device 4 is connected with the activated carbon absorber 3 and the exhaust smoke bin 5 through a desorption pipeline 8, a temperature sensor I and a nitrogen spray nozzle I are arranged in the activated carbon absorber 3, the nitrogen spray nozzle I is connected with a nitrogen making unit 9 through a nitrogen pipe I, the nitrogen making unit 9 is provided with a pneumatic valve I, the nitrogen making unit 9 is connected with a compressed air tank 10, and the temperature sensor I is connected with the nitrogen making unit 9 and the pneumatic valve I in a control mode; in the desorption link, the temperature sensor I monitors the desorption temperature in the activated carbon adsorber 3 and transmits signals to control the nitrogen generator set 9 to work when abnormal conditions such as overhigh desorption temperature occur, and nitrogen is filled into the activated carbon adsorber 3 through the nitrogen pipe I for cooling, so that the cooling protection effect on the activated carbon adsorber 3 is achieved.

Wherein, the dry filter 2 is used for removing fine paint mist particles in the gas, preventing the pollution of the following activated carbon adsorber 3 and prolonging the service life of the activated carbon. The dry filter 2 has a three-layer filter structure built therein, including: a G4 or DPA filter 21 for trapping and filtering small particles of 10 μm or more; a glass fiber cloth filter 22 for catching and filtering liquid drops and particles with a size of more than 1um, wherein a non-woven fabric filter material is arranged on the back surface of the glass fiber cloth filter 22; the F9 level filter bag 23 for trapping and filtering liquid drops and particulate matters with the particle size of more than 1um is made of non-woven fabrics; the G4 or DPA filter 21, the glass cloth filter 22, and the F9 stage filter bag 23 are arranged in order in the exhaust gas flow direction inside the dry filter 2, and the dry filter 2 is connected with a differential pressure gauge 24 for monitoring the pressure difference between the front chamber of the G4 or DPA filter 21 and the rear chamber of the F9 stage filter bag 23 so as to indicate whether the filter material needs to be replaced.

The RCO catalytic combustion device 4 is also connected with an off-line desorption box 40, a temperature sensor II is arranged in the off-line desorption box 40 and is provided with a nitrogen spray head II, the nitrogen spray head II is connected with a nitrogen making unit 9 through a nitrogen pipe II, the nitrogen pipe II is provided with a pneumatic valve II, the temperature sensor II is connected with the nitrogen making unit 9 and the pneumatic valve II in a control manner, the RCO catalytic combustion device 4 is internally provided with a desorption fan 41, the desorption pipeline 8 comprises a desorption air outlet pipe 81 connected between the desorption fan 41 and the activated carbon adsorber 3, the desorption air outlet pipe 81 is provided with a pneumatic valve III, and a desorption air inlet pipe 82 connected between an exhaust port of the RCO catalytic combustion device 4 and the activated carbon adsorber 3 are provided with a pneumatic valve IV; after the adsorption saturation of the activated carbon molecular sieve in the activated carbon adsorber 3, a pneumatic valve V on an adsorption pipeline is closed, a pneumatic valve III and a pneumatic valve IV on a desorption pipeline 8 are opened, hot air flow is desorbed by a desorption fan 41 and is sent into the RCO catalytic combustion device 4 for catalytic combustion, one part of desorbed high-temperature gas is directly exhausted through an exhaust smoke bin 5, and the other part of desorbed high-temperature gas is sent into the activated carbon adsorber 3 for desorption of activated carbon.

When the active carbon absorber 3 is subjected to desorption treatment, the off-line desorption box 40 can increase the circulating catalytic combustion of the desorbed organic matters and play a role in buffering the flow of the desorbed organic matters sent into the catalytic combustion device, so that the catalytic combustion efficiency of the desorbed organic matters in the desorption link is further improved, and the catalytic combustion of the desorbed organic matters is more sufficient; and the temperature sensor II monitors the desorption temperature in the off-line desorption box 40, controls the nitrogen generator set 9 to work when the temperature is abnormal, and fills nitrogen into the off-line desorption box 40 through the nitrogen pipe II and the nitrogen nozzle II to cool down, thereby playing a role in protecting the RCO catalytic combustion device.

Various other corresponding changes and modifications will occur to those skilled in the art from the foregoing description and the accompanying drawings, and all such changes and modifications are intended to be included within the scope of the present utility model as defined in the appended claims.

Claims

1. The utility model provides a coating line exhaust purification processing system, includes dry filter, active carbon adsorber, RCO catalytic combustion device, exhaust smoke storehouse and adsorption fan, dry filter connects active carbon adsorber and be in under the suction of adsorption fan to active carbon adsorber sends into waste gas, active carbon adsorber connects the exhaust smoke storehouse and pass through the gaseous of smoke storehouse exhaust purification, dry filter active carbon adsorber the exhaust smoke storehouse with adsorption fan passes through adsorption piping connection, be located on the adsorption piping the inlet end of active carbon adsorber, the pneumatic valve V is installed respectively to the end of giving vent to anger, RCO catalytic combustion device passes through desorption piping connection active carbon adsorber with the exhaust smoke storehouse, its characterized in that is equipped with temperature sensor I in the active carbon adsorber and installs nitrogen shower nozzle I, nitrogen shower nozzle I passes through nitrogen pipe I and connects nitrogen making unit, nitrogen making unit disposes pneumatic valve I, nitrogen making unit connects compressed air tank, temperature sensor I with nitrogen making unit pneumatic valve I connects.

2. The coating line waste gas purification treatment system according to claim 1, wherein the RCO catalytic combustion device is connected with an off-line desorption box, a temperature sensor II is arranged in the off-line desorption box, a nitrogen spray head II is installed in the off-line desorption box, the nitrogen spray head II is connected with the nitrogen making unit through a nitrogen pipe II, the nitrogen pipe II is provided with a pneumatic valve II, and the temperature sensor II is in control connection with the nitrogen making unit and the pneumatic valve II.

3. The coating line exhaust gas purification treatment system according to claim 1 or 2, wherein a desorption fan is arranged in the RCO catalytic combustion device, the desorption pipeline comprises a desorption air outlet pipe connected between the desorption fan and the activated carbon adsorber, a pneumatic valve iii is arranged on the desorption air outlet pipe, a desorption air inlet pipe connected between an exhaust port of the RCO catalytic combustion device and the activated carbon adsorber, and a pneumatic valve iv is arranged on the desorption air inlet pipe.

4. The coating line exhaust gas purification treatment system according to claim 1 or 2, wherein the adsorption blower is connected to an adsorption pipe section between the activated carbon adsorber and the exhaust gas hopper.

5. The coating line exhaust gas purification treatment system according to claim 1 or 2, wherein the adsorption blower is connected to an adsorption pipe section between the activated carbon adsorber and the dry filter.

6. The coating line exhaust gas purification treatment system according to claim 3, wherein a spray absorption tower is provided at a front end of the dry filter, an exhaust gas suction inlet is provided at a lower portion of the spray absorption tower, one end of a pipe is connected to a top of the spray absorption tower, and the other end is connected to the dry filter to communicate the spray absorption tower with the dry filter; a spraying system is arranged in the spraying absorption tower, a frame or net type filler layer is arranged corresponding to the spraying system, a dehydration filler layer is arranged in the spraying absorption tower, and the dehydration filler layer is a block honeycomb inclined tube or a corrugated inclined tube; the bottom of the spray absorption tower is provided with a liquid storage tank, the liquid storage tank is connected with the spray system through a pump and a pump pipeline, and the liquid storage tank is connected with a water inlet pipe and a water outlet pipe.

7. The coating line exhaust gas purifying treatment system according to claim 3, wherein the dry filter has a three-layer filter structure provided therein, comprising: a G4 or DPA filter to trap and filter small particulate matter above 10 microns; the glass fiber cloth filter is used for capturing and filtering liquid drops and particulate matters with the particle size of more than 1 um;

the F9 grade filter bag is used for capturing and filtering liquid drops and particulate matters with the particle size of more than 1 um; the G4 or DPA filter, the glass fiber cloth filter and the F9 level filter bag are sequentially arranged in the dry filter along the flow direction of the waste gas, and the dry filter is connected with a differential pressure meter used for monitoring the pressure difference between the front chamber of the G4 or DPA filter and the rear chamber of the F9 level filter bag.