CN212236519U - Water paint VOCs tail gas pre-dehumidification system - Google Patents
Water paint VOCs tail gas pre-dehumidification system Download PDFInfo
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- CN212236519U CN212236519U CN201922227086.2U CN201922227086U CN212236519U CN 212236519 U CN212236519 U CN 212236519U CN 201922227086 U CN201922227086 U CN 201922227086U CN 212236519 U CN212236519 U CN 212236519U
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Abstract
The utility model provides a water paint VOCs tail gas pre-dehumidification system, which comprises a tail gas inlet pipe, an absorption tower, a dry filter, a plurality of absorption and desorption concentration devices, a discharge tower and a catalyst combustion bed, wherein the absorption and desorption concentration devices are sequentially arranged; the outlet of the dry filter is communicated with the second air outlet pipe; wherein the second air outlet pipe is communicated, connected and fixed with the inlet of each adsorption, desorption and concentration device; the purification outlet of each adsorption and desorption concentration device is communicated with an exhaust pipe; the other end of the exhaust pipe is fixedly connected with the exhaust tower through an exhaust fan; one end of the heat exchange box is communicated with the first air outlet pipe through a hot air pipe; a first temperature and humidity sensor and a second temperature and humidity sensor are respectively arranged at the outlet ends of the first air outlet pipe and the dry filter; and a control valve is arranged at the air outlet end of the hot air pipe. The utility model discloses can utilize the steam that catalytic combustion produced to carry out dehumidification in advance, the energy saving.
Description
Technical Field
The utility model belongs to the technical field of exhaust-gas purification, specifically water based paint VOCs tail gas dehumidification system in advance.
Background
The waste gas of a coating workshop is mainly organic solvent contained in the coating and decomposition products of a coating film during spraying and drying, the components are harmful to the health and the living environment of people and have foul smell, and if people inhale low-concentration organic waste gas for a long time, chronic respiratory diseases such as cough, chest distress, asthma and even emphysema can be caused, and the waste gas is a strong carcinogen which is generally accepted at present.
At present, the tail gas of the water-based paint VOCs cannot be subjected to pre-dehumidification in the existing treatment process, so that the saturation time of a later-stage adsorption and desorption concentration device is influenced, and the adsorption effect is influenced.
SUMMERY OF THE UTILITY MODEL
Utility model purpose: the utility model aims at providing not enough in the prior art, provide water paint VOCs tail gas dehumidification system in advance, the operation energy consumption is low, can utilize the steam that catalytic combustion produced to carry out dehumidification in advance, and the energy saving improves the effect of handling.
The technical scheme is as follows: in order to achieve the purpose, the utility model provides a water paint VOCs tail gas pre-dehumidification system, which comprises a tail gas inlet pipe, an absorption tower, a dry filter, a plurality of absorption and desorption concentration devices, an emission tower and a catalyst combustion bed, wherein the absorption and desorption concentration devices are sequentially arranged; the tail gas inlet pipe is communicated with the gas inlet of the absorption tower; the gas outlet of the absorption tower is connected with a first gas outlet pipe; the first air outlet pipe is communicated and connected with the air inlet of the dry filter; the outlet of the dry filter is communicated with the second air outlet pipe; wherein the second air outlet pipe is communicated, connected and fixed with the inlet of each adsorption, desorption and concentration device; the purification outlet of each adsorption and desorption concentration device is communicated with an exhaust pipe; the other end of the exhaust pipe is fixedly connected with the exhaust tower through an exhaust fan; wherein one end of the heat exchange box is communicated with the catalyst combustion bed, and the other end of the heat exchange box is fixedly connected with the second fan; one end of the desorption fan is communicated and connected with the catalyst combustion bed, and the other end of the desorption fan is connected with the desorption pipe; the desorption pipe is communicated and fixedly connected with the desorption inlet of each adsorption and desorption concentration device; one end of the heat exchange box is communicated with the first air outlet pipe through a hot air pipe; wherein the hot air pipe is communicated with the desorption outlet of each adsorption and desorption concentration device; the outlet end of the first air outlet pipe and the outlet end of the dry filter are respectively provided with a first temperature and humidity sensor and a second temperature and humidity sensor; and a control valve is arranged at the air outlet end of the hot air pipe.
As an improvement of the scheme, the first temperature and humidity sensor and the second temperature and humidity sensor are both explosion-proof temperature and humidity sensors, and the temperature and humidity sensor is safe and reliable.
As an improvement of the scheme, a plurality of packing layers are arranged in the absorption tower from top to bottom; and a spraying layer is arranged under each packing layer, the spraying layers are communicated and fixedly connected with a water pipe, and the water pipe is fixedly connected with the circulating water tank through a water pump.
As an improvement of the scheme, a switch valve is arranged at the air inlet of each adsorption and desorption concentration device; the intermittent operation and the alternate operation can be realized.
When the utility model works, the tail gas of the water paint VOCs enters the absorption tower through the tail gas inlet pipe, the water pipe conveys cooling water to the spraying layer through the water pump, the tail gas after filtering of the spraying layer and the packing layer comes out from the first outlet pipe and is filtered through the dry filter, and the waste gas of the spraying workshop contains a large amount of paint mist and some water vapor and dust; the dry type filter has the advantages of removing paint mist and water vapor in waste gas components by the aid of a defogging and dehumidifying function of the dry type filter, removing dust in the waste gas components by the aid of the dust remover, and reducing interference on treatment efficiency of subsequent equipment. Feeding into the inlet of the adsorption and desorption concentration device; performing activated carbon adsorption; then the purified gas is conveyed to an exhaust tower through an exhaust pipe and an exhaust fan to be exhausted.
2. Because the active carbon in the adsorption and desorption concentration device is saturated after long-time use and has poor adsorption performance, the desorption fan is used for desorbing the adsorption and desorption concentration device, and desorbed gas is fed into the catalyst combustion bed for combustion; meanwhile, a large amount of hot gas is sent into the hot air pipe through the second fan;
3. because the first temperature and humidity sensor and the second temperature and humidity sensor are arranged, the program is set according to the highest humidity requirement of the adsorbent, when the humidity is higher than the set humidity, the control valve is opened, and the high temperature after catalytic combustion dehumidifies the gas humidity in the water-based paint; the high-temperature gas with the temperature of 150 ℃ and the VOCs gas are mixed and enter a dry filter for heating and dehumidification.
The utility model has the advantages that: the hot gas generated by catalytic combustion can be utilized for pre-dehumidification, so that the energy is saved, and the treatment effect is improved.
Drawings
Fig. 1 is a schematic structural diagram of the present invention.
Detailed Description
The present invention will be further explained with reference to the accompanying drawings and embodiments, which are to be understood as illustrative only and not limiting the scope of the invention. It should be noted that the terms "front," "back," "left," "right," "upper" and "lower" used in the following description refer to directions in the drawings, and the terms "inner" and "outer" refer to directions toward and away from, respectively, the geometric center of a particular component.
As shown in fig. 1: the water paint VOCs tail gas pre-dehumidification system comprises a tail gas inlet pipe 1, an absorption tower 2, a dry filter 3, a plurality of absorption, desorption and concentration devices 4, an exhaust tower 5 and a catalyst combustion bed 6 which are sequentially arranged; an on-off valve 41 is arranged at the air inlet of each adsorption and desorption concentration device 4.
Wherein the tail gas inlet pipe 1 is communicated and connected with the gas inlet of the absorption tower 2; the gas outlet of the absorption tower 2 is connected with a first gas outlet pipe 7; a plurality of packing layers 21 are arranged in the absorption tower 2 from top to bottom; a spraying layer 22 is arranged right below each packing layer 21, the spraying layers 22 are communicated and fixedly connected with a water pipe 23, and the water pipe 23 is fixedly connected with a circulating water tank 25 through a water pump 24.
The first air outlet pipe 7 is communicated and connected with an air inlet of the dry filter 3; the outlet of the dry filter 3 is communicated with a second air outlet pipe 9; wherein the second air outlet pipe 9 is communicated, connected and fixed with the inlet of each adsorption, desorption and concentration device 4; the purification outlet of each adsorption and desorption concentration device 4 is communicated with an exhaust pipe 10; the other end of the exhaust pipe 10 is fixedly connected with the exhaust tower 5 through an exhaust fan 11; wherein one end of the heat exchange box 12 is communicated with the catalyst combustion bed 6, and the other end is fixedly connected with the second fan 13; one end of the desorption fan 14 is communicated with the catalyst combustion bed 6, and the other end is connected with the desorption pipe 42; the desorption pipe 42 is communicated and fixedly connected with the desorption inlet of each adsorption and desorption concentration device 4; wherein, one end of the heat exchange box 12 is communicated with the first air outlet pipe 7 through a hot air pipe 15; wherein the hot air pipe 15 is communicated with the desorption outlet of each adsorption and desorption concentration device 4; the outlet end of the first air outlet pipe 7 and the outlet end of the dry filter 3 are respectively provided with a first temperature and humidity sensor 16 and a second temperature and humidity sensor 17; and the air outlet end of the hot air pipe 15 is provided with a control valve 8.
The first temperature and humidity sensor 16 and the second temperature and humidity sensor 17 both adopt explosion-proof temperature and humidity sensors.
The embodiment is as follows:
1. the tail gas of the water paint VOCs enters the absorption tower 2 through the tail gas inlet pipe 1, the water pipe 23 conveys cooling water to the spraying layer 22 through the water pump 24, the filtered tail gas passing through the spraying layer 22 and the packing layer 21 comes out of the first gas outlet pipe 7 and is filtered through the dry filter 3, and the waste gas of the spraying workshop contains a large amount of paint mist and some water vapor and dust; the dry type filter has the advantages of removing paint mist and water vapor in waste gas components by the aid of a defogging and dehumidifying function of the dry type filter, removing dust in the waste gas components by the aid of the dust remover, and reducing interference on treatment efficiency of subsequent equipment. The second air outlet pipe 9 sends the gas to the inlet of the adsorption, desorption and concentration device 4; performing activated carbon adsorption; the purified gas is then discharged through the exhaust duct 10 and through the exhaust fan 11 to the discharge tower 5.
2. After long-term use, the activated carbon in the adsorption and desorption concentration device 4 is saturated and has poor adsorption performance, the desorption fan 14 works to desorb the adsorption and desorption concentration device 4, and the desorbed gas is fed into the catalyst combustion bed 6 to be combusted; meanwhile, a large amount of hot gas is sent into the hot air pipe by the second fan 13 from the high-temperature gas in the heat exchange box 12;
3. because the first temperature and humidity sensor 16 and the second temperature and humidity sensor 17 are arranged, the program is set according to the highest humidity requirement of the adsorbent, when the humidity is higher than the set humidity, the control valve 8 is opened, and the high temperature after catalytic combustion dehumidifies the gas humidity in the water-based paint; the high-temperature gas with the temperature of 150 ℃ and the VOCs gas are mixed and enter a dry filter for heating and dehumidification.
The technical means disclosed by the scheme of the present invention is not limited to the technical means disclosed by the above embodiments, but also includes the technical scheme formed by the arbitrary combination of the above technical features.
Claims (4)
1. The water paint VOCs tail gas pre-dehumidification system is characterized by comprising a tail gas inlet pipe (1), an absorption tower (2), a dry filter (3), a plurality of absorption, desorption and concentration devices (4) which are sequentially arranged, a discharge tower (5) and a catalyst combustion bed (6); wherein the tail gas inlet pipe (1) is communicated and connected with the gas inlet of the absorption tower (2); the gas outlet of the absorption tower (2) is connected with a first gas outlet pipe (7); the first air outlet pipe (7) is communicated and connected with an air inlet of the dry filter (3); the outlet of the dry filter (3) is communicated and connected with a second air outlet pipe (9); wherein the second air outlet pipe (9) is communicated, connected and fixed with the inlet of each adsorption, desorption and concentration device (4); the purification outlet of each adsorption and desorption concentration device (4) is communicated with an exhaust pipe (10); the other end of the exhaust pipe (10) is fixedly connected with the exhaust tower (5) through an exhaust fan (11); wherein one end of the heat exchange box (12) is communicated with the catalyst combustion bed (6) and the other end is fixedly connected with the second fan (13); one end of the desorption fan (14) is communicated and connected with the catalyst combustion bed (6) and the other end is connected with the desorption pipe (42); the desorption pipe (42) is communicated, connected and fixed with the desorption inlet of each adsorption, desorption and concentration device (4); wherein one end of the heat exchange box (12) is communicated with the first air outlet pipe (7) through a hot air pipe (15); wherein the hot air pipe (15) is communicated with the desorption outlet of each adsorption and desorption concentration device (4); the outlet end of the first air outlet pipe (7) and the outlet end of the dry filter (3) are respectively provided with a first temperature and humidity sensor (16) and a second temperature and humidity sensor (17); and a control valve (8) is arranged at the air outlet end of the hot air pipe (15).
2. The water-based paint VOCs tail gas pre-dehumidification system of claim 1, characterized in that: the first temperature and humidity sensor (16) and the second temperature and humidity sensor (17) both adopt explosion-proof temperature and humidity sensors.
3. The system for pre-dehumidifying tail gases of water-based paint VOCs according to claim 1, wherein a plurality of packing layers (21) are arranged in the absorption tower (2) from top to bottom; a spraying layer (22) is arranged right below each packing layer (21), the spraying layers (22) are communicated and fixedly connected with a water pipe (23), and the water pipe (23) is fixedly connected with a circulating water tank (25) through a water pump (24).
4. The water-based paint VOCs tail gas pre-dehumidification system of claim 1, characterized in that: and a switch valve (41) is arranged at the air inlet of each adsorption and desorption concentration device (4).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922227086.2U CN212236519U (en) | 2019-12-12 | 2019-12-12 | Water paint VOCs tail gas pre-dehumidification system |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922227086.2U CN212236519U (en) | 2019-12-12 | 2019-12-12 | Water paint VOCs tail gas pre-dehumidification system |
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| CN212236519U true CN212236519U (en) | 2020-12-29 |
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| CN201922227086.2U Active CN212236519U (en) | 2019-12-12 | 2019-12-12 | Water paint VOCs tail gas pre-dehumidification system |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112957876A (en) * | 2021-02-02 | 2021-06-15 | 江阴联众环保工程有限公司 | Treatment device for treating waste gas containing dichloroethane |
| CN113750709A (en) * | 2021-10-12 | 2021-12-07 | 泰兴协联众达化学有限公司 | Naphthalene-process phthalic anhydride tail gas catalytic treatment system and treatment method thereof |
-
2019
- 2019-12-12 CN CN201922227086.2U patent/CN212236519U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112957876A (en) * | 2021-02-02 | 2021-06-15 | 江阴联众环保工程有限公司 | Treatment device for treating waste gas containing dichloroethane |
| CN113750709A (en) * | 2021-10-12 | 2021-12-07 | 泰兴协联众达化学有限公司 | Naphthalene-process phthalic anhydride tail gas catalytic treatment system and treatment method thereof |
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