CN212369871U - Energy-saving and emission-reducing hydrochloric acid waste gas recycling device - Google Patents
Energy-saving and emission-reducing hydrochloric acid waste gas recycling device Download PDFInfo
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- CN212369871U CN212369871U CN201922421693.2U CN201922421693U CN212369871U CN 212369871 U CN212369871 U CN 212369871U CN 201922421693 U CN201922421693 U CN 201922421693U CN 212369871 U CN212369871 U CN 212369871U
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Abstract
The utility model discloses an energy saving and emission reduction's hydrochloric acid waste gas recycle device, including washing spray column, alkali spray column and acid storage tank, the water inlet and the air inlet of washing spray column let in pure water and waste gas respectively, and the water inlet and the air inlet of alkali spray column let in alkali lye and the waste gas that the last order spray column flows out respectively, and the gas outlet intercommunication atmosphere of final stage alkali spray column, the water inlet of washing spray column still are connected with the flowmeter, and the acid storage tank is connected to the overflow mouth of washing spray column, send the acid pump to store up the solution output of acid inslot. The acid concentration is accurately controlled by controlling the proportion of the waste gas and the pure water, the pH is not required to be measured, the basic stability of the acid concentration can be ensured, the addition of alkali is reduced, the wastewater discharge is reduced, the operation cost is saved, and the corresponding economic benefit is generated.
Description
Technical Field
The utility model relates to a hydrochloric acid exhaust-gas treatment technical field, concretely relates to energy saving and emission reduction hydrochloric acid waste gas recycle device.
Background
Due to the strong corrosiveness of hydrochloric acid, almost all metals can chemically react with it at high temperatures. Therefore, hydrochloric acid is mostly adopted as an acid cleaning medium in the acid cleaning industry of China to remove an oxide layer on the surface of metal. And hydrochloric acid has strong volatility, so that the pickling is usually carried out at higher temperature, and the volatilization of the hydrochloric acid is accelerated. The volatilized acid liquid enters the air and meets the moisture in the air to be condensed to form fine fog drops. In addition, because chemical reaction occurs in the pickling solution, a large amount of bubbles are formed, and acid liquid drops are also brought out by blasting after the bubbles float to the liquid surface. These acid mist droplets are released into the atmosphere and a large amount of hydrochloric acid off-gas is generated.
At present, the treatment scheme of the hydrochloric acid waste gas is as follows: after the hydrochloric acid waste gas is collected by a workshop collecting system, a two-stage alkali spray tower is adopted for neutralization treatment, and the waste gas after reaching the standard is discharged into the atmosphere through a fan. Although the aim of purifying the waste gas and finally discharging the waste gas up to the standard is achieved, because the concentration of the original hydrochloric acid waste gas is higher, a large amount of alkali liquor is required to be consumed to neutralize the hydrochloric acid waste gas, so that (1) the consumption of the medicament is very large, and the operation cost is higher; (2) a large amount of neutralized wastewater can be generated, and the neutralized wastewater has large water quantity and extremely high salt content and can also have certain influence on the environment; (3) losing the value of recycling and reusing.
In order to solve the problems, the company designs a hydrochloric acid waste gas recycling device of CN206996248, but the device has inaccurate control on the concentration of acid, causes subsequent alkali adding amount fluctuation, and increases the use amount of alkali.
Disclosure of Invention
The to-be-solved technical problem of the utility model is to provide a hydrochloric acid waste gas recycle device of accurate control acid concentration, guarantee that the concentration of acid is stable basically, reduce the joining of alkali, reduce wastewater discharge, practice thrift the running cost, produce corresponding economic benefits.
In order to solve the technical problem, the utility model provides an energy saving and emission reduction's hydrochloric acid waste gas recycle device, including washing spray column, alkali spray column and acid storage tank, the water inlet and the air inlet of washing spray column let in pure water and waste gas respectively, the water inlet and the air inlet of alkali spray column let in alkali lye and the waste gas that last order spray column flows respectively, the last stage the gas outlet intercommunication atmosphere of alkali spray column, the water inlet of washing spray column still is connected with the flowmeter, the overflow mouth of washing spray column is connected acid storage tank, send the acid pump will the solution output in the acid storage tank.
Further, the alkali spray tower is provided with a first stage.
Further, the air outlet of the last stage alkali spray tower is communicated with the atmosphere through a fan.
Furthermore, a filter is arranged between the water washing spray tower and the acid storage tank.
Further, the filter is a bag filter.
Furthermore, the water inlets of the water washing spray tower and the alkali spray tower are respectively connected with a pure water supply device and an alkali liquor supply device.
The utility model discloses an energy saving and emission reduction's hydrochloric acid waste gas recycle device compares with prior art's beneficial effect is, through the proportion accurate control acid concentration of control waste gas and pure water, need not to measure pH, can guarantee that the concentration of acid is stable basically, reduces the joining of alkali, reduces waste water discharge, practices thrift the running cost, produces corresponding economic benefits.
Drawings
Fig. 1 is a schematic view of the overall structure of the present invention.
Detailed Description
The present invention is further described with reference to the following drawings and specific embodiments so that those skilled in the art can better understand the present invention and can implement the present invention, but the embodiments are not to be construed as limiting the present invention.
Referring to fig. 1, for the utility model discloses an energy saving and emission reduction's hydrochloric acid waste gas recycle device's embodiment, including washing spray column 10, alkali spray column 20 and acid storage tank 30, directly utilize the pure water to absorb hydrochloric acid waste gas through setting up washing spray column 10, obtain pure hydrochloric acid solution, but this hydrochloric acid solution direct recycle stores and stores up in the acid storage tank 30. Since the solubility of the hydrochloric acid waste gas in pure water is limited, an alkali spray tower 20 is further provided for treating the hydrochloric acid waste gas which is not completely dissolved by the water washing spray tower 10. In this embodiment, water inlet and air inlet 11 of washing spray column 10 let in pure water and waste gas respectively, and the pure water is under the effect of circulating pump, and the manifold cycles sprays, absorbs hydrochloric acid in the waste gas, forms hydrochloric acid solution, can directly recycle, the water inlet and the air inlet 11 of alkali spray column 20 let in alkali lye and the waste gas that last level spray column flowed out respectively, utilize alkali lye to carry out neutralization reaction to the hydrochloric acid that has not absorbed in the last level spray column, form the waste water that can discharge, so circulate, final stage waste gas after alkali spray column 20 handles is purified and can reach the standard and discharge, and the gas outlet of alkali spray column 20 can directly communicate the atmosphere this moment, and can not cause the influence to the environment. Further, in this embodiment, in order to reduce the usage amount of alkali liquor in the alkali spray tower 20, the water inlet of the water spray tower 10 is further connected with a flowmeter 13, the flow rate of pure water entering the water spray tower 10 is controlled by the flowmeter 13, because the content of hydrochloric acid in the waste gas is certain, when quantitative waste gas is introduced, the content of hydrochloric acid capable of being absorbed by pure water is certain, the flow rate of pure water is controlled by the flowmeter 13, so that the hydrochloric acid waste gas can be ensured to be absorbed as much as possible, and the pure water is ensured to absorb hydrochloric acid waste gas with preset content to form hydrochloric acid solution, so that the waste of pure water is avoided, the concentration of the formed acid solution is basically stable, the hydrochloric acid solution is gathered in the water tank of the water spray tower 10, and. Through setting up flowmeter 13, the control dissolves the flow of hydrochloric acid waste gas, guarantee the concentration of hydrochloric acid solution after the absorption stable basically, thereby along with constantly letting in pure water and hydrochloric acid waste gas, the overflow mouth 14 on water tank upper portion can be followed to hydrochloric acid solution continuously flows, and need not to carry out the pH measurement, hydrochloric acid solution in the water tank is taken out through the elevator pump when waiting to reach certain pH value, this kind of mode of setting need not to add the elevator pump on the one hand, hydrochloric acid solution overflows from the water tank automatically, reduce the complexity of equipment, realize energy-conserving purpose, on the other hand makes hydrochloric acid solution be in the continuous motion process, guarantee hydrochloric acid solution's stability, can not increase the dissolution rate of waste gas owing to mix for a long time with waste gas, improve hydrochloric acid solution's concentration, keep the. Further, since a large amount of hydrochloric acid is dissolved in the water-washing spray tower 10, the exhaust gas can be purified with substantially no alkali or little alkali added in the subsequent alkali spray tower 20. Along with the reduction of the dosage of alkali, the service cycle of alkali liquor in the alkali spray tower 20 is prolonged, the quantity of generated neutralization wastewater is correspondingly reduced, the discharged wastewater is reduced, and corresponding economic benefits can be generated. Because the acid content in the waste gas is reduced, the purification purpose can be realized without arranging two stages of alkali spray towers 20, and therefore, the alkali spray tower 20 is arranged in one stage in the embodiment. An overflow port 14 of the water washing spray tower 10 is connected with the acid storage tank 30, and an acid pump outputs the solution in the acid storage tank 30.
Further, the water inlets of the water washing spray tower 10 and the alkali spray tower 20 are respectively connected with a pure water supply device 12 and an alkali liquor supply device 21. The pure water supply device 12 and the alkali liquor supply device 21 are respectively connected to the water washing spray tower 10 and the alkali spray tower 20 through supply pipelines to supply pure water and alkali liquor. The air outlet of the final stage alkali spray tower 20 is communicated with the atmosphere through a fan 40. And discharging the gas meeting the purification standard.
Further, a filter 50 is arranged between the water washing spray tower 10 and the acid storage tank 30. The hydrochloric acid solution formed is filtered through a bag filter 50 to ensure the purity of the hydrochloric acid solution. In this embodiment, the filter 50 is a bag filter 50. The bag filter 50 has small volume, simple and flexible operation, energy saving, high efficiency and closed work, and can prevent secondary pollution caused by impurities filtered out from the hydrochloric acid solution.
The above-mentioned embodiments are merely preferred embodiments for fully illustrating the present invention, and the scope of the present invention is not limited thereto. Equivalent substitutes or changes made by the technical personnel in the technical field on the basis of the utility model are all within the protection scope of the utility model. The protection scope of the present invention is subject to the claims.
Claims (6)
1. The utility model provides an energy saving and emission reduction's hydrochloric acid waste gas recycle device, its characterized in that, including washing spray column, alkali spray column and acid storage tank, pure water and waste gas are let in respectively to washing spray column's water inlet and air inlet, alkali spray column's water inlet and air inlet let in respectively alkali lye and the last grade waste gas that spray column flowed out, the final stage alkali spray column's gas outlet intercommunication atmosphere, washing spray column's water inlet still is connected with the flowmeter, washing spray column's overflow mouth is connected acid storage tank, send the acid pump will the solution output in the acid storage tank.
2. The energy-saving emission-reducing hydrochloric acid waste gas recycling device as claimed in claim 1, wherein the alkali spray tower is provided with a first stage.
3. The energy-saving and emission-reducing hydrochloric acid waste gas recycling device as claimed in claim 1, wherein the outlet of the final stage alkali spray tower is communicated with the atmosphere through a fan.
4. The energy-saving and emission-reducing hydrochloric acid waste gas recycling device as claimed in claim 1, wherein a filter is arranged between the water washing spray tower and the acid storage tank.
5. The energy-saving emission-reducing hydrochloric acid waste gas recycling device according to claim 4, wherein the filter is a bag filter.
6. The energy-saving and emission-reducing hydrochloric acid waste gas recycling device as claimed in claim 1, wherein the water inlets of the water washing spray tower and the alkali spray tower are respectively connected with a pure water supply device and an alkali liquor supply device.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922421693.2U CN212369871U (en) | 2019-12-28 | 2019-12-28 | Energy-saving and emission-reducing hydrochloric acid waste gas recycling device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922421693.2U CN212369871U (en) | 2019-12-28 | 2019-12-28 | Energy-saving and emission-reducing hydrochloric acid waste gas recycling device |
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| Publication Number | Publication Date |
|---|---|
| CN212369871U true CN212369871U (en) | 2021-01-19 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201922421693.2U Active CN212369871U (en) | 2019-12-28 | 2019-12-28 | Energy-saving and emission-reducing hydrochloric acid waste gas recycling device |
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| Country | Link |
|---|---|
| CN (1) | CN212369871U (en) |
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2019
- 2019-12-28 CN CN201922421693.2U patent/CN212369871U/en active Active
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