CN216136993U - Oxidation line pretreatment waste gas recovery system - Google Patents

Abstract

The utility model discloses a system for recovering waste gas from pretreatment of an oxidation line. An air inlet is arranged above the five water tanks of acid washing, chemical polishing, ash removal, dyeing and sealing of the air collecting channel, the air collecting channel is connected with a purification tower, the purification tower is connected with an air outlet channel, the air outlet channel is connected with an air exhaust chimney, an exhaust fan is arranged at the lower part of the air exhaust chimney, and a demisting plate is arranged in the air outlet channel; one side of the purification tower is provided with a water tank, the water collecting area is communicated with the water tank, the water tank is connected with a dosing tank, and a 4% concentration sodium hydroxide solution is added into the dosing tank; a supporting plate is arranged in the purification tower, a filler is arranged on the supporting plate, and a pressing plate is arranged at the top of the filler; a spray head is arranged above the pressing plate and is connected with a spray pipe, the spray pipe is connected with a circulating water pump, and the circulating water pump is connected with a water tank; the circulating water pump, the spray pipe, the spray header, the water collecting area and the water tank form a circulating water path; the exhaust fan forms negative pressure in the exhaust chimney, the air outlet channel, the purification tower and the gas collecting channel.

Description

Oxidation line pretreatment waste gas recovery system

The technical field is as follows:

the utility model belongs to the technical field of anodic oxidation production, and particularly relates to a system for recovering waste gas from pretreatment of an oxidation line.

Background art:

the part is required to be treated on the surface before anodic oxidation, the surface treatment process comprises pickling, chemical polishing, ash removal, dyeing and sealing, and the parts are washed with water after the other processes except the sealing process. A large amount of water vapor is generated in the whole process, the water vapor and acid liquor drops are mixed to form acid mist, equipment can be corroded, certain threat is brought to the physical health of workers, and how to treat waste gas is a problem to be solved.

The information disclosed in this background section is only for enhancement of understanding of the general background of the utility model and should not be taken as an acknowledgement or any form of suggestion that this information forms the prior art already known to a person skilled in the art.

The utility model has the following contents:

the utility model aims to provide a system for recovering waste gas from pretreatment of an oxidation line, so as to overcome the defects in the prior art.

In order to achieve the above object, the present invention provides an oxidation line pretreatment exhaust gas recovery system, comprising: the device comprises an air collecting channel, an air inlet, a purification tower, an air outlet channel, an air exhaust chimney, an exhaust fan, a demisting plate, a dosing tank, a circulating water pump, a water tank, a spray pipe, a spray header, filler, a supporting plate and a pressing plate; the gas collecting channel is positioned above the water tanks in each process of the surface treatment process, an air inlet is arranged above the five water tanks for pickling, chemical polishing, dust removal, dyeing and sealing, the gas collecting channel is connected with a purification tower, the purification tower is connected with an air outlet channel, the air outlet channel is connected with an air exhaust chimney, an exhaust fan is arranged at the lower part of the air exhaust chimney, and a demisting plate is arranged in the air outlet channel; a water collecting area is arranged at the lower part of the purification tower, a water tank is arranged at one side of the purification tower, the water collecting area is communicated with the water tank, the water tank is connected with a dosing tank, and a 4% concentration sodium hydroxide solution is added into the dosing tank; a supporting plate is arranged in the purification tower, a filler is arranged on the supporting plate, a pressing plate is arranged at the top of the filler, and water seepage holes are uniformly distributed in the supporting plate and the pressing plate; a spray head is arranged above the pressing plate and is connected with a spray pipe, the spray pipe is connected with a circulating water pump, and the circulating water pump is connected with a water tank; the circulating water pump, the spray pipe, the spray header, the water collecting area and the water tank form a circulating water path; the exhaust fan forms negative pressure in the exhaust chimney, the air outlet channel, the purification tower and the gas collecting channel.

Preferably, in the technical scheme, an upper set of spray header, a lower set of spray header, the packing, the supporting plate and the pressing plate are arranged in the purification tower, so that the spray liquid is prevented from concentrating on the inner wall of the tower to form wall flow when flowing along the packing, and the gas-liquid distribution in the packing is not uniform.

Preferably, among the technical scheme, the defogging board is parallel arrangement around in the air flue, reduces gaseous velocity of flow through multichannel defogging board, makes unnecessary vapor adhere to with on the defogging board.

Compared with the prior art, the utility model has the following beneficial effects:

through carrying out neutralization to the waste gas that contains the acid mist, unnecessary vapor is got rid of to the defogging board, has guaranteed that the waste gas of collecting reaches emission standard, has protected equipment in the workshop not corroded by the acid mist, and workman's health obtains guaranteeing.

Description of the drawings:

FIG. 1 is a schematic view of the structure of a waste gas recovery system for pretreatment in an oxidation line according to the present invention;

the reference signs are: 1-air collecting channel, 2-air inlet, 3-purifying tower, 4-air outlet channel, 5-air exhaust chimney, 6-exhaust fan, 7-demisting plate, 8-medicine feeding tank, 9-circulating water pump, 10-water tank, 11-spray pipe, 12-spray head, 13-filler, 14-supporting plate, 15-pressing plate, 16-water tank and 17-water collecting area.

The specific implementation mode is as follows:

the following detailed description of specific embodiments of the utility model is provided, but it should be understood that the scope of the utility model is not limited to the specific embodiments.

Throughout the specification and claims, unless explicitly stated otherwise, the word "comprise", or variations such as "comprises" or "comprising", will be understood to imply the inclusion of a stated element or component but not the exclusion of any other element or component.

As shown in fig. 1, a system for recovering exhaust gas from pretreatment of an oxidation line includes: the device comprises an air collecting channel 1, an air inlet 2, a purification tower 3, an air outlet channel 4, an exhaust chimney 5, an exhaust fan 6, a demisting plate 7, a dosing tank 8, a circulating water pump 9, a water tank 10, a spray pipe 11, a spray header 12, a filler 13, a support plate 14 and a pressure plate 15; the air collecting channel 1 is positioned above water tanks 16 in each process of the surface treatment process, an air inlet 2 is arranged above the five water tanks 16 of acid washing, chemical polishing, ash removal, dyeing and sealing of the air collecting channel 1, the air collecting channel 1 is connected with a purification tower 3, the purification tower 3 is connected with an air outlet channel 4, the air outlet channel 4 is connected with an air exhaust chimney 5, an exhaust fan 6 is arranged at the lower part of the air exhaust chimney 5, demisting plates 7 are arranged in the air outlet channel 4, four demisting plates 7 are arranged in the air outlet channel 4 in parallel front and back, the flow rate of gas is reduced by the plurality of demisting plates 7, and redundant steam is attached to and demisting plates 7; a water collecting area 17 is arranged at the lower part of the purification tower 3, a water tank 10 is arranged at one side of the purification tower 3, the water collecting area 17 is communicated with the water tank 10, the water tank 10 is connected with a dosing tank 8, and 4% concentration sodium hydroxide solution is added in the dosing tank 8; a supporting plate 14 is arranged in the purification tower 3, a filler 13 is arranged on the supporting plate 14, a pressing plate 15 is arranged at the top of the filler 13, and water seepage holes are uniformly distributed on the supporting plate 14 and the pressing plate 15; a spray header 12 is arranged above the pressure plate 15, the spray header 12 is connected with a spray pipe 11, the spray pipe 11 is connected with a circulating water pump 9, and the circulating water pump 9 is connected with a water tank 10; the circulating water pump 9, the spray pipe 11, the spray head 12, the water collecting area 17 and the water tank 10 form a circulating water path; the exhaust fan 6 forms negative pressure in the exhaust chimney 5, the air outlet channel 4, the purification tower 3 and the air collecting channel 1. An upper spray header 12, a lower spray header 13, a packing 13, a supporting plate 14 and a pressing plate 15 are arranged in the purifying tower 1, so that the spraying liquid is prevented from concentrating on the inner wall of the tower to form wall flow when flowing along the packing, and the gas-liquid distribution in the packing is not uniform.

The exhaust fan 6 starts, forms the negative pressure in the system, collects the gas collecting channel 1 with the gas that basin 16 volatilizees, and waste gas gets into purification tower 3 through gas collecting channel 1, and 4% concentration sodium hydroxide solution gets into water tank 10 from adding medicine jar 8, and circulating water pump 9 starts, and shower head 12 spouts the liquid medicine into filler 13, two upper and lower filler 13 departments, and waste gas and liquid medicine intensive mixing reaction, acid-base neutralization, remove sour, and neutralization liquid falls into water-collecting zone 17 cyclic utilization. When the acid-removed gas passes through the air outlet channel 4, water vapor in the gas is intercepted and removed by the demisting plate 7, and finally the gas reaching the emission standard is discharged from the air exhaust chimney 5, so that equipment in a workshop is protected from being corroded by acid mist, and the health of workers is ensured.

The foregoing descriptions of specific exemplary embodiments of the present invention have been presented for purposes of illustration and description. It is not intended to limit the utility model to the precise form disclosed, and obviously many modifications and variations are possible in light of the above teaching. The exemplary embodiments were chosen and described in order to explain certain principles of the utility model and its practical application to enable one skilled in the art to make and use various exemplary embodiments of the utility model and various alternatives and modifications as are suited to the particular use contemplated. It is intended that the scope of the utility model be defined by the claims and their equivalents.

Claims (3)

1. The utility model provides an oxidation line pretreatment waste gas recovery system which characterized in that: comprises an air collecting channel, an air inlet, a purification tower, an air outlet channel, an air exhaust chimney, an exhaust fan, a demisting plate, a dosing tank, a circulating water pump, a water tank, a spray pipe, a spray header, a filler, a support plate and a pressure plate; the gas collecting channel is positioned above the water tanks in each process of the surface treatment process, an air inlet is arranged above the five water tanks for pickling, chemical polishing, dust removal, dyeing and sealing, the gas collecting channel is connected with a purification tower, the purification tower is connected with an air outlet channel, the air outlet channel is connected with an air exhaust chimney, an exhaust fan is arranged at the lower part of the air exhaust chimney, and a demisting plate is arranged in the air outlet channel; a water collecting area is arranged at the lower part of the purification tower, a water tank is arranged at one side of the purification tower, the water collecting area is communicated with the water tank, the water tank is connected with a dosing tank, and a 4% concentration sodium hydroxide solution is added into the dosing tank; a supporting plate is arranged in the purification tower, a filler is arranged on the supporting plate, a pressing plate is arranged at the top of the filler, and water seepage holes are uniformly distributed in the supporting plate and the pressing plate; a spray head is arranged above the pressing plate and is connected with a spray pipe, the spray pipe is connected with a circulating water pump, and the circulating water pump is connected with a water tank; the circulating water pump, the spray pipe, the spray header, the water collecting area and the water tank form a circulating water path; the exhaust fan forms negative pressure in the exhaust chimney, the air outlet channel, the purification tower and the gas collecting channel.

2. The oxidation line pretreatment exhaust gas recovery system according to claim 1, characterized in that: an upper spray head, a lower spray head, a filler, a supporting plate and a pressing plate are arranged in the purification tower.

3. The oxidation line pretreatment exhaust gas recovery system according to claim 1, characterized in that: the demisting plates are arranged in parallel front and back in the air outlet channel.

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