CN219290865U

CN219290865U - Hydrochloric acid mist waste gas recovery system

Info

Publication number: CN219290865U
Application number: CN202320086205.0U
Authority: CN
Inventors: 阮鹏宇; 罗军; 陈刚; 刘守成; 陈宇新
Original assignee: Chongqing Yongquan Environmental Protection Industry Co ltd
Current assignee: Chongqing Yongquan Environmental Protection Industry Co ltd
Priority date: 2023-01-30
Filing date: 2023-01-30
Publication date: 2023-07-04
Anticipated expiration: 2033-01-30

Abstract

The utility model discloses a hydrochloric acid mist waste gas recovery system, which relates to the technical field of acid mist treatment and comprises an acid mist collecting pipe and a connecting pipe which are communicated with an acid washing tank, wherein a spray absorption tower is fixedly arranged at one end of the connecting pipe, which is far away from the acid mist collecting pipe, a treatment component which can absorb acid mist for convenient discharge is arranged in the spray absorption tower.

Description

Hydrochloric acid mist waste gas recovery system

Technical Field

The utility model relates to the technical field of acid mist treatment, in particular to a hydrochloric acid mist waste gas recovery system.

Background

Before surface plating after annealing of iron materials, concentrated hydrochloric acid is usually used for cleaning a dense oxide layer on the surface, hydrochloric acid is an important industrial raw material, and because the hydrochloric acid has extremely strong corrosiveness and volatility, the volatilized hydrogen chloride gas is colorless and has toxic gas with pungent smell, acid mist is extremely easy to form in the air, and in order to meet the requirement of the hydrogen chloride emission limit value in the comprehensive emission standard of atmospheric pollutants, the volatile gas is required to be processed to reach the standard and then can be emitted, and the acid mist is processed through a spray absorption tower in the traditional processing.

In summer, the air temperature is high, the dense oxide layer on the surface of the iron material is easy to wash away, and in winter, the dense oxide layer on the surface of the iron material is difficult to thoroughly wash away, so that in order to improve the pickling efficiency, the staff can improve the pickling temperature, however, the volatilization amount of hydrochloric acid can be increased due to the temperature rise, the load is increased on the original waste gas treatment system, the original spray absorption tower is not ideal in treatment effect, the risk of exceeding standard emission is improved, and the problem of factory corrosion is aggravated.

Disclosure of Invention

(one) solving the technical problems

Aiming at the defects of the prior art, the utility model provides a hydrochloric acid mist waste gas recovery system, which solves the problems that the prior hydrochloric acid mist waste gas recovery system increases the load of the prior waste gas treatment system under the condition of improving the temperature for improving the pickling efficiency, causes the prior spray absorption tower to have unsatisfactory treatment effect, improves the risk of exceeding standard emission and aggravates factory corrosion.

(II) technical scheme

In order to achieve the above purpose, the present utility model provides the following technical solutions: the utility model provides a hydrochloric acid mist waste gas recovery system, includes acid mist collecting pipe and the connecting pipe with the pickling tank intercommunication, the one end that the acid mist collecting pipe was kept away from to the connecting pipe has set firmly the spray absorption tower, be equipped with in the spray absorption tower and play the absorption effect to the acid mist in order to the processing assembly of emission, be equipped with the pretreatment case between acid mist collecting pipe and the connecting pipe, be equipped with in the pretreatment case and play the pretreatment structure in order to reduce original waste gas treatment system load to the acid mist.

Through above-mentioned technical scheme, play the absorption effect in order to hydrochloric acid's recycle through spray absorption tower and processing assembly's effect to the acid mist, increased the volume of volatilizing when hydrochloric acid is at high temperature, set up the pretreatment case between acid mist collecting pipe and connecting pipe, acid mist collecting pipe, pretreatment case and connecting pipe communicate each other, through the effect of the inside pretreatment structure of pretreatment case, play the pretreatment effect to the acid mist, reduced spray absorption tower's load, do not influence exhaust emission.

Preferably, the pretreatment structure comprises a horizontal partition plate fixedly connected with the bottom end of the inner wall of the pretreatment tank, a plurality of hollowed-out grooves are formed in the horizontal partition plate, a transverse blocking plate is fixedly arranged at the top of the inner cavity of the pretreatment tank, a baffle is fixedly arranged between the horizontal partition plate and the blocking plate, a plurality of umbrella-shaped partition plates which play a role in gas-liquid separation are fixedly arranged between the inner cavity of the pretreatment tank and the baffle, a plurality of umbrella-shaped partition plates are stacked in the vertical direction, and through holes which are convenient for gas to pass through are formed in the umbrella-shaped partition plates.

Through the technical scheme, a plurality of umbrella-shaped division plates are all located the outlet duct below, acid mist in the intake pipe gets into the pretreatment tank inner chamber and is blocked by the baffle, acid mist flows downwards under the effect of baffle, partial acid mist is when passing through the baffle, condensable gas in the acid mist condenses to form the water droplet and adheres to the baffle, the remaining acid mist passes the fretwork groove of horizontal baffle, the reverse flow, the direction flow of acid mist orientation outlet duct, and can play the gas-liquid separation effect to remaining acid mist through the effect of umbrella-shaped division plates, hydrogen chloride gas condenses down together with vapor to form condensed acid liquor, assemble in the inside bottom of pretreatment tank.

Preferably, the inner cavity of the pretreatment box is hollow, an air inlet pipe fixedly connected with the acid mist collecting pipe is arranged at one end of the pretreatment box, which is close to the acid mist collecting pipe, and an air outlet pipe fixedly connected with the connecting pipe is arranged at one end of the pretreatment box, which is close to the connecting pipe.

Through above-mentioned technical scheme, sour fog collecting pipe, intake pipe, pretreatment case inner chamber, outlet duct, connecting pipe and spray absorption tower inside intercommunication each other, the sour fog circulation of being convenient for is handled.

Preferably, one end of the air inlet pipe extends to the inner cavity of the pretreatment box, a wedge-shaped air outlet groove is formed in one end of the air inlet pipe extending to the inner cavity of the pretreatment box, and the top of the air inlet pipe extending to one end of the inner cavity of the pretreatment box is fixedly connected with the baffle plate.

Through above-mentioned technical scheme, through the cooperation of intake pipe, wedge gas outlet tank and baffle, inside the acid mist got into pretreatment tank through the intake pipe, intake pipe and baffle formed the water conservancy diversion structure, the acid mist can only flow downwards under the effect of intake pipe and baffle, and the acid mist flows in opposite directions, has improved the gas-liquid separation efficiency of acid mist, has further reduced the processing load of spray absorber.

Preferably, the baffle specifically comprises a plurality of strip-shaped transverse plates, the strip-shaped transverse plates are obliquely arranged, the strip-shaped transverse plates form a shutter curtain structure and are fixedly connected, a plurality of axially arranged diversion trenches are formed in the strip-shaped transverse plates, and a cooling assembly for cooling acid mist in the acid mist collecting pipe so as to further improve the gas-liquid separation effect is arranged on the acid mist collecting pipe.

Through above-mentioned technical scheme, because the baffle is specifically a plurality of fixed connection and the horizontal board of slope setting is constituteed, and a plurality of horizontal board of bar is constituteed with the blind curtain formula structure, has improved the area of contact of acid mist and baffle, has improved gas-liquid separation efficiency, and through set up the guiding gutter on the baffle, has reduced the acid mist and has been difficult to collect into liquid and drip and flow or by near high-speed atomizing again and follow outlet duct exhaust possibility of the intake pipe, has improved gas-liquid separation effect.

Preferably, the cooling module is including the liquid collecting box that is located acid mist collecting pipe below, liquid collecting box top is equipped with the roof, through axial support fixed connection between liquid collecting box and the roof, the space between a plurality of roof is worn to set up by the acid mist collecting pipe and contradict with liquid collecting box upper surface, the cold water tank has been set firmly to the side of liquid collecting box, the cold water tank upper surface has set firmly A water pump and liquid supplementing pipe, the water inlet end and the delivery port end fixed connection of cold water tank of A water pump, the delivery port end of A water pump has set firmly the outlet pipe, the one end that the A water pump was kept away from to the outlet pipe gets into in the roof, set firmly a plurality of shower nozzle on the outlet pipe, the shower nozzle extends the roof lower surface, the side of liquid collecting box has set firmly B water pump, the water inlet end and the play water outlet end intercommunication of liquid collecting box of B water pump, be equipped with on the liquid collecting box to play fan and the heating panel of cooling effect to the inside rivers of liquid collecting box.

Through the technical scheme, the acid mist collecting pipe is penetrated between the liquid collecting box and the top plate, the acid mist collecting pipe is supported through the action of the liquid collecting box, the A water pump is opened, cooling water inside the cold water tank sequentially passes through the water outlet pipe and the spray nozzle to be discharged through the action of the A water pump, cooling water plays the cooling effect on the acid mist collecting pipe and the acid mist inside the acid mist collecting pipe, so that the acid mist is in contact with the gas-liquid separation with the baffle, meanwhile, the cooling water passing through the acid mist collecting pipe falls into the liquid collecting box and is collected by the liquid collecting box, the cooling water heated inside the liquid collecting box is cooled through the action of the fan and the heat radiating plate, and the cooling water enters the inside of the cold water tank through the action of the B water pump, so that the cooling water is recycled, and the environmental protection effect is achieved when the acid mist pretreatment efficiency is improved.

Preferably, the treatment assembly comprises a liquid collecting tank arranged at the bottom end inside the spray absorption tower, two packing layers positioned above the liquid collecting tank are fixedly arranged in the spray absorption tower, a C water pump is arranged at the side of the spray absorption tower, a main water pipe is fixedly arranged at the water outlet end of the C water pump, a water diversion pipe communicated with the main water pipe is fixedly arranged on the main water pipe, the water diversion pipe extends to the inside of the spray absorption tower, each water diversion pipe is positioned above the adjacent packing layers, a plurality of spray heads communicated with the water diversion pipe are fixedly arranged at the part, extending to the inside of the spray absorption tower, of the water diversion pipe, a fan is arranged at the side of the C water pump, an exhaust pipe communicated with the air inlet end of the fan is fixedly arranged at the top of the spray absorption tower, one end of the exhaust pipe is communicated with the top of the spray absorption tower, and the other end of the exhaust pipe is communicated with the air inlet of the fan.

Through above-mentioned technical scheme, the connecting pipe is located spray absorber inside bottom and communicates with spray absorber inside lower side, the packing layer and spray absorber inner wall fixed connection, spray absorber is worn to establish by the shunt and with spray absorber fixed connection, spray absorber and shunt junction are sealed, the shower head, shunt and main water pipe communicate each other, the water inlet and the running water piping connection of C water pump, the acid mist passes through the connecting pipe and gets into spray absorber inside, and from bottom to top at spray absorber's inside moves, play the absorption effect through the effect of packing layer, open the C water pump simultaneously, make the rivers get into the shunt through main water pipe through the effect of C water pump, and flow out through the shower head, through the effect of shower head to the acid mist dilution effect, the gaseous blast pipe that gets into under the effect of fan after the absorption treatment, by the air outlet of fan discharges again.

Preferably, the communicating pipe that circulates with the pretreatment tank inner chamber has been set firmly to the pretreatment tank lower side, the one end of keeping away from the pretreatment tank communicating pipe is equipped with the D water pump, and the water inlet end and the communicating pipe intercommunication of D water pump to the play water end and the collecting vat intercommunication of D water pump, all be equipped with the solenoid valve on main water pipe and the shunt tube, the E water pump has been set firmly on the spray absorption tower, and the inlet tube and the inside intercommunication of collecting vat of E water pump to the outlet pipe and the treatment pond intercommunication of neutralization condensation acidizing fluid of E water pump.

Through the technical scheme, condensed acid liquid condensed at the bottom of the inner cavity of the pretreatment tank enters the communicating pipe under the action of the D water pump, then enters the liquid collecting tank, and is converged with the condensed acid liquid in the liquid collecting tank, and the condensed acid liquid in the liquid collecting tank flows into the treatment tank through the action of the E water pump so as to neutralize the condensed acid liquid and recycle the condensed acid liquid.

(III) beneficial effects

The utility model provides a hydrochloric acid mist waste gas recovery system. The beneficial effects are as follows:

(1) This hydrochloric acid mist waste gas recovery system plays the absorption effect in order to hydrochloric acid's recycle through spraying absorption tower and processing module's effect to the acid mist, has increased the volume of volatilizing when hydrochloric acid when high temperature, sets up the pretreatment case between acid mist collecting pipe and connecting pipe, and acid mist collecting pipe, pretreatment case and connecting pipe communicate each other, through the effect of the inside pretreatment structure of pretreatment case, play the pretreatment effect to the acid mist, reduced the load that sprays the absorption tower, do not influence exhaust emission, the risk of exceeding standard emission reduces, has reduced peripheral factory building corrosion rate.

(2) This hydrochloric acid mist waste gas recovery system, between collector box and the roof are worn to establish by the acid mist collecting pipe, and play the supporting role to the acid mist collecting pipe through the effect of collector box, open A water pump, make the inside cooling water of cold water tank pass through outlet pipe and shower nozzle discharge in proper order through the effect of A water pump, the cooling water plays cooling effect to the inside acid mist of acid mist collecting pipe and acid mist collecting pipe, so that acid mist and baffle contact gas-liquid separation, the cooling water through the acid mist collecting pipe falls into the collector box inside and is collected by the collector box simultaneously, the effect of rethread fan and heating panel cools down the inside intensification of collector box cooling water, the effect of rethread B water pump gets into inside the cold water tank, make cooling water cyclic utilization, the environmental protection effect has been played in the time of improving acid mist preliminary treatment efficiency.

(3) This hydrochloric acid mist waste gas recovery system, condensation acidizing fluid that condenses in pretreatment tank inner chamber bottom gets into communicating pipe inside under the effect of D water pump, and then gets into the collecting tank inside, and with the inside condensation acidizing fluid of collecting tank assemble, make the inside condensation acidizing fluid of collecting tank flow into in the treatment tank through the effect of E water pump to the neutralization treatment is carried out to the condensation acidizing fluid, the recovery of the condensation acidizing fluid of being convenient for.

Drawings

FIG. 1 is a schematic diagram of the overall structure of the present utility model;

FIG. 2 is an enlarged schematic view of the structure of FIG. 1A according to the present utility model;

fig. 3 is a schematic view of a structure for embodying the baffle plate of the present utility model.

In the figure: 1. acid mist collecting pipe; 2. a liquid collecting box; 3. a bracket; 4. a top plate; 5. a spray head; 6. a cold water tank; 7. a fluid supplementing pipe; 8. a, a water pump; 9. a water outlet pipe; 10. a pretreatment box; 11. a horizontal partition; 12. a baffle; 13. an air inlet pipe; 14. wedge-shaped air outlet grooves; 15. umbrella-shaped partition plates; 16. an air outlet pipe; 17. a communicating pipe; 18. a connecting pipe; 19. spraying an absorption tower; 20. a liquid collecting tank; 21. a filler layer; 22. a main water pipe; 23. a water diversion pipe; 24. a spray header; 25. c, a water pump; 26. a blower; 27. and an exhaust pipe.

Detailed Description

The following description of the embodiments of the present utility model will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present utility model, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.

As shown in fig. 1-3, the present utility model provides a technical solution: the utility model provides a hydrochloric acid mist waste gas recovery system, includes acid mist collecting pipe 1 and connecting pipe 18 with the pickling tank intercommunication, and the one end that acid mist collecting pipe 1 was kept away from to connecting pipe 18 has set firmly spray absorption tower 19, is equipped with in the spray absorption tower 19 and plays the processing assembly that absorbs the effect in order to discharge to the acid mist, plays the absorption effect in order to recycle of hydrochloric acid to the acid mist through the effect of spray absorption tower 19 and processing assembly.

As shown in figure 1, the treatment assembly comprises a liquid collecting tank 20 arranged at the bottom end inside a spray absorption tower 19, two packing layers 21 positioned above the liquid collecting tank 20 are fixedly arranged in the spray absorption tower 19, the packing layers 21 are specifically a plurality of existing old-fashioned pall rings, a C water pump 25 is arranged at the side of the spray absorption tower 19, a main water pipe 22 is fixedly arranged at the water outlet end of the C water pump 25, a water diversion pipe 23 communicated with the main water pipe 22 is fixedly arranged on the main water pipe 22, the water diversion pipe 23 extends into the spray absorption tower 19, each water diversion pipe 23 is positioned above the adjacent packing layers 21, a plurality of spray heads 24 communicated with the water diversion pipe 23 are fixedly arranged at the part of the water diversion pipe 23 extending into the spray absorption tower 19, a fan 26 is arranged at the side of the C water pump 25, an exhaust pipe 27 communicated with the air inlet end of the fan 26 is fixedly arranged at the top end of the spray absorption tower 19, one end of the exhaust pipe 27 is communicated with the top end of the spray absorption tower 19, the other end is communicated with an air inlet of a fan 26, a connecting pipe 18 is positioned at the bottom end inside the spray absorption tower 19 and is communicated with the lower side inside the spray absorption tower 19, a packing layer 21 is fixedly connected with the inner wall of the spray absorption tower 19, a water diversion pipe 23 penetrates through the spray absorption tower 19 and is fixedly connected with the spray absorption tower 19, the joint of the spray absorption tower 19 and the water diversion pipe 23 is sealed, a spray header 24, the water diversion pipe 23 and a main water pipe 22 are mutually communicated, a water inlet of a C water pump 25 is connected with a tap water pipe, acid mist enters the spray absorption tower 19 through the connecting pipe 18 and moves up from bottom to top in the spray absorption tower 19, the acid mist is absorbed through the action of the packing layer 21, a C water pump 25 is turned on, water flow enters the water diversion pipe 23 through the main water pipe 22 through the action of the C water pump 25 and flows out through the spray header 24, the acid mist diluting action is performed through the action of the spray header 24, the gas after the absorption treatment enters into the exhaust pipe 27 under the action of the fan 26, and is discharged from the air outlet of the fan 26.

As shown in fig. 1 and 3, when the temperature of the hydrochloric acid in the pickling tank is increased to enlarge the volatilization amount in winter and the temperature is low, a pretreatment tank 10 is arranged between the acid mist collecting pipe 1 and the connecting pipe 18, the inner cavity of the pretreatment tank 10 is hollow, one end of the pretreatment tank 10, which is close to the acid mist collecting pipe 1, is provided with an air inlet pipe 13 fixedly connected with the acid mist collecting pipe 1, one end of the pretreatment tank 10, which is close to the connecting pipe 18, is provided with an air outlet pipe 16 fixedly connected with the connecting pipe 18, the inside of the acid mist collecting pipe 1, the air inlet pipe 13, the inner cavity of the pretreatment tank 10, the air outlet pipe 16, the connecting pipe 18 and the spray absorption tower 19 are mutually communicated, so that the acid mist circulation treatment is facilitated, the pretreatment tank 10 is internally provided with a pretreatment structure for pretreating the acid mist to reduce the load of the original waste gas treatment system, the pretreatment effect is achieved on the acid mist through the effect of the pretreatment structure in the pretreatment tank 10, and the load of the spray absorption tower 19 is reduced, and the waste gas emission is not affected.

As shown in fig. 1 and 3, the pretreatment structure comprises a horizontal partition plate 11 fixedly connected with the bottom end of the inner wall of a pretreatment tank 10, a plurality of hollow grooves are formed in the horizontal partition plate 11, a transverse blocking plate is fixedly arranged at the top of the inner cavity of the pretreatment tank 10, a baffle plate 12 is fixedly arranged between the horizontal partition plate 11 and the blocking plate, a plurality of umbrella-shaped partition plates 15 playing a role in gas-liquid separation are fixedly arranged between the inner cavity of the pretreatment tank 10 and the baffle plate 12, the plurality of umbrella-shaped partition plates 15 are stacked in the vertical direction, through holes for gas to pass through are formed in the umbrella-shaped partition plates 15, the plurality of umbrella-shaped partition plates 15 are all located below an air outlet pipe 16, acid mist in the air inlet pipe 13 enters the inner cavity of the pretreatment tank 10 and is blocked by the baffle plate 12, the acid mist flows downwards under the action of the baffle plate 12, when part of the acid mist passes through the baffle plate 12, the condensable gas in the acid mist forms water drops attached to the baffle plate 12, the rest of the acid mist passes through the hollow grooves of the horizontal partition plate 11 and flows reversely, the acid mist flows towards the direction of the air outlet pipe 16, and plays a role in gas-liquid separation on the rest of the acid mist through the action of the partition plates 15, the effect of the gas mist is formed in the gas-liquid separation, the acid mist and the condensation gas is condensed with the condensed at the bottom end of the inside of the pretreatment tank 10, and the water vapor is formed inside the pretreatment tank.

As shown in fig. 1 and fig. 3, in order to further improve the pretreatment efficiency, one end of the air inlet pipe 13 extends to the inner cavity of the pretreatment tank 10, one end of the air inlet pipe 13 extending to the inner cavity of the pretreatment tank 10 is provided with a wedge-shaped air outlet groove 14, the top of one end of the air inlet pipe 13 extending to the inner cavity of the pretreatment tank 10 is fixedly connected with the baffle 12, acid mist enters the pretreatment tank 10 through the air inlet pipe 13 by matching the air inlet pipe 13, the wedge-shaped air outlet groove 14 and the baffle 12, the air inlet pipe 13 and the baffle 12 form a diversion structure, the acid mist can only flow downwards under the action of the air inlet pipe 13 and the baffle 12, the acid mist flows reversely, the gas-liquid separation efficiency of the acid mist is improved, and the treatment load of the spray absorption tower 19 is further reduced.

As shown in fig. 1 and 3, in order to further improve the pretreatment efficiency, the baffle 12 is specifically formed by a plurality of strip-shaped transverse plates, the plurality of strip-shaped transverse plates are obliquely arranged, the plurality of strip-shaped transverse plates form a shutter structure and are fixedly connected, a plurality of axially arranged diversion trenches are formed in the strip-shaped transverse plates, as the baffle 12 is specifically formed by a plurality of strip-shaped transverse plates fixedly connected and obliquely arranged, the plurality of strip-shaped transverse plates are formed by a shutter structure, the contact area of acid mist and the baffle 12 is improved, the gas-liquid separation efficiency is improved, and by arranging the diversion trenches on the baffle 12, the possibility that the acid mist is difficult to be collected into liquid dripping flow or is atomized again by high-speed flow near the air inlet pipe 13 and discharged from the air outlet pipe 16 is reduced, and the gas-liquid separation effect is improved.

As shown in fig. 1 and 2, when acid mist enters the pretreatment tank 10, the flow speed is reduced, the acid mist is cooled, the hydrogen chloride gas component in the gas can form small liquid drops to flow along with the air flow so as to improve the gas-liquid separation efficiency, the cooling component for cooling the acid mist in the acid mist collecting pipe 1 so as to further improve the gas-liquid separation effect is arranged on the acid mist collecting pipe 1, the cooling component comprises a liquid collecting box 2 positioned below the acid mist collecting pipe 1, a top plate 4 is arranged above the liquid collecting box 2, the liquid collecting box 2 and the top plate 4 are fixedly connected through an axial bracket 3, the acid mist collecting pipe 1 penetrates through gaps among a plurality of top plates 4 and is abutted against the upper surface of the liquid collecting box 2, a cold water tank 6 is fixedly arranged beside the liquid collecting box 2, an A water pump 8 and a fluid supplementing pipe 7 are fixedly arranged on the upper surface of the cold water tank 6, the water inlet end of the A water pump 8 is fixedly connected with the water outlet end of the cold water tank 6, the water outlet end of the A water pump 8 is fixedly arranged on the water outlet end of the top plate 9, one end of the water outlet pipe 9 far away from the A water pump 8 enters the top plate 4, a plurality of spray heads 5 are fixedly arranged on the water outlet 5, the lower surface of the spray heads 5 is fixedly arranged on the top plate 4, a side of the liquid collecting pipe 2B is fixedly arranged on the side of the liquid collecting pipe 2 and is fixedly arranged on the side of the liquid collecting pipe 2 through the water pump 2, the water pump B and is in turn communicated with the cooling end of the water pump 2, the cooling water pump 2 and the cooling end is communicated with the top plate 1 through the cooling end of the water pump 2, the cooling water pump 2 and the cooling end is cooled by the cooling water pump 1, the cooling end is cooled by the cooling end is communicated with the cooling end 1 through the cooling water pump 2 and the cooling end through the cooling end 1 and the cooling water pump 2 and the cooling end 1 and has the cooling end and is sequentially and cooled water pump 2, so that the acid mist is in contact with the baffle 12 for gas-liquid separation, and meanwhile, the cooling water passing through the acid mist collecting pipe 1 falls into the liquid collecting box 2 and is collected by the liquid collecting box 2, the cooling water heated in the liquid collecting box 2 is cooled by the action of the fan and the cooling plate, and the cooling water enters the cold water tank 6 through the action of the B water pump, so that the cooling water is recycled, and the environmental protection effect is achieved while the acid mist pretreatment efficiency is improved.

When the acid mist cooling device is used, a power supply is switched on, a switch is turned on, acid mist in the acid mist washing tank enters the acid mist collecting pipe 1, the water pump A8 is turned on, cooling water in the cold water tank 6 enters the water outlet pipe 9 through the action of the water pump A8, the cooling water entering the water outlet pipe 9 is sprayed out through the spray nozzle 5, the cooling water cools the outer wall of the acid mist collecting pipe 1, cooling water falling from the acid mist collecting pipe 1 enters the liquid collecting box 2, the cooling effect is achieved on water flow in the liquid collecting box 2 through the action of a fan and a radiator, the cooled water source flows back into the cold water tank 6 again through the action of the water pump B, the cyclic utilization of the cooling water is realized, and the cost is reduced;

the cooled acid mist enters the air inlet pipe 13, the acid mist entering the air inlet pipe 13 enters the pretreatment tank 10, the blocking effect of the wedge-shaped air outlet groove 14 and the baffle 12 is improved, the acid mist flows downwards, the acid mist contacts with the baffle 12, the baffle 12 is obliquely fixed by a plurality of strip-shaped transverse plates to form a shutter curtain structure, the contact area of the acid mist and the baffle 12 is increased, the acid mist contacts with the baffle 12 for gas-liquid separation, part of the acid mist contacts with the baffle 12 for condensation to form condensation acid liquor, the condensation acid liquor falls into the bottom end of the inside of the pretreatment tank 10, the residual acid mist flows upwards through the hollow groove of the horizontal partition plate 11, the acid mist contacts with the umbrella-shaped partition plate 15, the gas-liquid separation effect is further achieved through the effect of the umbrella-shaped partition plate 15, the possibility that the condensation acid liquor on the baffle 12 is atomized again by high-speed flow near the air inlet pipe 13 and discharged from the air outlet pipe 16 is reduced, and the gas-liquid separation effect is improved;

the pretreated acid mist enters the spray absorption tower 19 through the connecting pipe 18, the absorption treatment effect of the spray absorption tower 19 on the acid mist is improved by arranging the two packing layers 21 and the two water diversion pipes 23, the C water pump 25 is turned on, water flows through the main water pipe 22 and the water diversion pipes 23 and then is sprayed out through the spray header 24 through the action of the C water pump 25, the water flows dilute the acid mist to form hydrochloric acid, the hydrochloric acid falls back into the liquid collection tank 20, and the treated waste gas flows into the exhaust pipe 27 through the action of the fan 26 and is discharged through the air outlet of the fan 26;

after the device is used for a period of time, the D water pump is opened, condensed acid liquid condensed at the bottom of the inner cavity of the pretreatment tank 10 enters the communicating pipe 17 under the action of the D water pump, then enters the liquid collecting tank 20, and is converged with hydrochloric acid liquid in the liquid collecting tank 20, hydrochloric acid in the liquid collecting tank 20 flows into the treatment tank through the action of the E water pump so as to neutralize the hydrochloric acid, the hydrochloric acid is recovered, the pipelines in the device are all made of glass fiber reinforced plastic materials, the use process of the hydrochloric acid mist waste gas recovery system is adopted, and meanwhile, the content which is not described in detail in the specification belongs to the prior art which is known to the person skilled in the art.

It is noted that relational terms such as first and second, and the like are used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Moreover, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising one … …" does not exclude the presence of other like elements in a process, method, article, or apparatus that comprises the element.

Although embodiments of the present utility model have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made therein without departing from the principles and spirit of the utility model, the scope of which is defined in the appended claims and their equivalents.

Claims

1. The utility model provides a hydrochloric acid mist waste gas recovery system which characterized in that: the acid mist pretreatment device comprises an acid mist collecting pipe (1) and a connecting pipe (18) which are communicated with a pickling tank, wherein one end of the connecting pipe (18) far away from the acid mist collecting pipe (1) is fixedly provided with a spray absorption tower (19), a treatment component which can absorb acid mist and is convenient to discharge is arranged in the spray absorption tower (19), a pretreatment box (10) is arranged between the acid mist collecting pipe (1) and the connecting pipe (18), and a pretreatment structure which can pretreat acid mist and reduce the load of an original waste gas treatment system is arranged in the pretreatment box (10);

the pretreatment structure comprises a horizontal partition plate (11) fixedly connected with the bottom end of the inner wall of a pretreatment box (10), a plurality of hollowed-out grooves are formed in the horizontal partition plate (11), a transverse blocking plate is fixedly arranged at the top of the inner cavity of the pretreatment box (10), a baffle plate (12) is fixedly arranged between the horizontal partition plate (11) and the blocking plate, a plurality of umbrella-shaped partition plates (15) which play a role in gas-liquid separation are fixedly arranged between the inner cavity of the pretreatment box (10) and the baffle plate (12), a plurality of umbrella-shaped partition plates (15) are stacked in the vertical direction, and through holes which are convenient for gas to pass through are formed in the umbrella-shaped partition plates (15).

2. The hydrochloric acid mist waste gas recovery system according to claim 1, wherein: the pretreatment box (10) is hollow in inner cavity, one end of the pretreatment box (10) close to the acid mist collecting pipe (1) is provided with an air inlet pipe (13) fixedly connected with the acid mist collecting pipe (1), and one end of the pretreatment box (10) close to the connecting pipe (18) is provided with an air outlet pipe (16) fixedly connected with the connecting pipe (18).

3. The hydrochloric acid mist waste gas recovery system according to claim 2, wherein: one end of the air inlet pipe (13) extends to the inner cavity of the pretreatment box (10), a wedge-shaped air outlet groove (14) is formed in one end of the air inlet pipe (13) extending to the inner cavity of the pretreatment box (10), and the top of the air inlet pipe (13) extending to one end of the inner cavity of the pretreatment box (10) is fixedly connected with the baffle plate (12).

4. The hydrochloric acid mist waste gas recovery system according to claim 1, wherein: the baffle (12) is specifically formed by a plurality of strip-shaped transverse plates, the strip-shaped transverse plates are obliquely arranged, the strip-shaped transverse plates form a shutter curtain structure and are fixedly connected, a plurality of axially arranged diversion trenches are formed in the strip-shaped transverse plates, and the acid mist collecting pipe (1) is provided with a cooling assembly for cooling the acid mist in the acid mist collecting pipe (1) so as to further improve the gas-liquid separation effect.

5. The hydrochloric acid mist waste gas recovery system according to claim 4, wherein: the cooling assembly comprises a liquid collecting box (2) positioned below the acid mist collecting pipe (1), a top plate (4) is arranged above the liquid collecting box (2), the liquid collecting box (2) and the top plate (4) are fixedly connected through an axial bracket (3), and the acid mist collecting pipe (1) penetrates through gaps among a plurality of top plates (4) and is in contact with the upper surface of the liquid collecting box (2);

the side of collecting box (2) has set firmly cold water tank (6), cold water tank (6) upper surface has set firmly A water pump (8) and fluid replacement pipe (7), the water inlet end of A water pump (8) and the delivery port end fixed connection of cold water tank (6), the delivery port end of A water pump (8) has set firmly outlet pipe (9), in the one end entering roof (4) of A water pump (8) was kept away from to outlet pipe (9), set firmly a plurality of shower nozzle (5) on outlet pipe (9), shower nozzle (5) extend roof (4) lower surface, the side of collecting box (2) has set firmly B water pump, the water inlet end of B water pump communicates with the water outlet end of collecting box (2), the water outlet end of B water pump communicates with the water inlet end of cold water tank (6), be equipped with on collecting box (2) to play fan and the heating panel of cooling effect to the inside rivers of collecting box (2).

6. The hydrochloric acid mist waste gas recovery system according to claim 1, wherein: the treatment assembly comprises a liquid collecting tank (20) arranged at the bottom end inside a spray absorption tower (19), two packing layers (21) arranged above the liquid collecting tank (20) are fixedly arranged in the spray absorption tower (19), a C water pump (25) is arranged beside the spray absorption tower (19), a main water pipe (22) is fixedly arranged at the water outlet end of the C water pump (25), a water diversion pipe (23) communicated with the main water pipe (22) is fixedly arranged on the main water pipe (22), the water diversion pipe (23) extends to the inside of the spray absorption tower (19), each water diversion pipe (23) is positioned above the adjacent packing layers (21), a plurality of spray heads (24) communicated with the water diversion pipe (23) are fixedly arranged at the parts inside the water diversion pipe (23), a fan (26) is arranged beside the C water pump (25), an exhaust pipe (27) communicated with the air inlet end of the fan (26) is fixedly arranged at the top end of the spray absorption tower (19), and one end of the exhaust pipe (27) is communicated with the air inlet end of the spray absorption tower (19).

7. The hydrochloric acid mist waste gas recovery system according to claim 6, wherein: the utility model discloses a pretreatment case, including pretreatment case (10) and water distribution pipe (23), pretreatment case (10) lower side has set firmly communicating pipe (17) with pretreatment case (10) inner chamber circulation, the one end of keeping away from pretreatment case (10) communicating pipe (17) is equipped with the D water pump, and the water inlet end and communicating pipe (17) intercommunication of D water pump to the play water end and collecting vat (20) intercommunication of D water pump, all be equipped with the solenoid valve on main water pipe (22) and water distribution pipe (23), set firmly the E water pump on spray absorption tower (19), and the inlet tube and the inside intercommunication of collecting vat (20) of E water pump to the outlet pipe and the treatment pond intercommunication of neutralization condensation acidizing fluid of E water pump.