CN212440721U - Hydrogen sulfide tail gas absorption treatment device - Google Patents
Hydrogen sulfide tail gas absorption treatment device Download PDFInfo
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- CN212440721U CN212440721U CN202020451330.3U CN202020451330U CN212440721U CN 212440721 U CN212440721 U CN 212440721U CN 202020451330 U CN202020451330 U CN 202020451330U CN 212440721 U CN212440721 U CN 212440721U
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- tail gas
- gas absorption
- hydrogen sulfide
- alkali liquor
- pipeline
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Abstract
The utility model relates to a tail gas absorbing device, concretely relates to hydrogen sulfide tail gas absorbs processing apparatus. The system comprises a tail gas absorption unit, an alkali liquor circulation unit is communicated with the tail gas absorption unit through an alkali liquor conveying pipeline, and a negative pressure pumping-out unit is communicated with the tail gas absorption unit through a negative pressure pumping-out pipeline; the tail gas absorption unit comprises a tail gas absorption tower, and the lower part of the tail gas absorption tower is connected with a tail gas absorption pipeline; the alkali liquor circulating unit comprises an alkali liquor storage tank, the alkali liquor storage tank is communicated with the top of the tail gas absorption tower through an alkali liquor conveying pipeline, and a water pump is arranged on the alkali liquor conveying pipeline; the negative pressure evacuation unit is communicated with the tail gas absorption tower through a negative pressure evacuation pipeline, and a vacuum pump is arranged on the negative pressure evacuation pipeline. The hydrogen sulfide tail gas absorption treatment device is low in cost and high in treatment efficiency, and can produce sodium hydrosulfide.
Description
Technical Field
The utility model relates to a tail gas absorbing device, concretely relates to hydrogen sulfide tail gas absorbs processing apparatus.
Background
With the development of industry, the air pollution condition is continuously serious, hydrogen sulfide gas is used as an acid gas and is one of the sources of air pollutants, the mode of treating hydrogen sulfide in the prior art is mainly incineration, the incineration treatment effect is very limited, and new pollutants are generated by incineration.
Sodium hydrosulfide is an auxiliary agent used for synthesizing organic intermediates and preparing sulfur dyes in the dye industry, has high practical value in the industry, and hydrogen sulfide is one of main raw materials of the sodium hydrosulfide, therefore, some devices for preparing the sodium hydrosulfide by utilizing tail gas containing hydrogen sulfide are provided in the prior art, for example, a sodium hydrosulfide absorption device which is connected with a plurality of absorption towers in series is provided in the prior art, and the absorption towers are connected in series, so that the efficiency can be improved, but the cost is too high, and the actual production is not facilitated.
SUMMERY OF THE UTILITY MODEL
For solving the problems existing in the prior art, the utility model provides a hydrogen sulfide tail gas absorption and treatment device with lower cost and capable of producing sodium hydrosulfide
The utility model provides a hydrogen sulfide tail gas absorbs processing apparatus, including tail gas absorption unit, alkali lye circulation unit passes through alkali lye pipeline and tail gas absorption unit intercommunication, and the negative pressure is managed to find time the unit and is managed to find time pipeline and tail gas absorption unit intercommunication through the negative pressure.
The tail gas absorption unit comprises a tail gas absorption tower, and the lower part of the tail gas absorption tower is connected with a tail gas absorption pipeline.
The alkali liquor circulating unit comprises an alkali liquor storage tank, the alkali liquor storage tank is communicated with the top of the tail gas absorption tower through an alkali liquor conveying pipeline, and a water pump is arranged on the alkali liquor conveying pipeline. The negative pressure evacuation unit is communicated with the tail gas absorption tower through a negative pressure evacuation pipeline, and a vacuum pump is arranged on the negative pressure evacuation pipeline.
Preferably, the tail gas absorption tower comprises a tower body, a liquid distributor is arranged at the top of the tower body, a plurality of tower trays are longitudinally distributed in the tower body, and filler is filled in the tower body and is random packing.
Preferably, each layer of trays is provided with a liquid distributor.
Preferably, the top of the tower is provided with a defoaming wire mesh.
Preferably, the tail gas absorption pipeline is connected with an induced draft fan.
Preferably, the alkali liquor conveying pipeline is communicated with a rich liquor absorption pipe.
Preferably, the rich liquid absorption pipe is installed after the water pump in a liquid flow direction.
Preferably, the water pump is a plurality of water pumps distributed in parallel.
Preferably, the vacuum pump is a plurality of vacuum pumps distributed in parallel.
Preferably, the pipelines are all stainless steel pipelines.
Has the advantages that:
1) hydrogen sulfide tail gas absorbs processing apparatus and utilizes caustic soda cyclic utilization, and caustic soda availability factor is high, and control caustic soda is excessive, is favorable to the absorption of hydrogen sulfide, also prevents effectively that sodium hydrosulfide from decomposing.
2) The water pump is parallelly connected, can adjust according to actual conditions is nimble.
3) The utility model discloses rationally designed the structure of tail gas absorption tower, made gaseous phase and liquid phase fully react, the mass transfer efficiency increase has avoided setting up a plurality of series towers among the prior art, greatly reduced the cost.
Drawings
FIG. 1 is a diagram of a hydrogen sulfide tail gas absorption treatment device according to an embodiment.
FIG. 2 is a schematic diagram of an example tail gas absorber.
Wherein: 1. a tail gas absorption line; 2. a caustic soda storage tank; 3. a tail gas absorption tower; 4. a water pump; 5. evacuating the pipeline under negative pressure; 6. a rich liquid recovery pipe; 7. an alkali liquor conveying pipeline; 8. a vacuum pump.
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely below, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiment of the present invention, all other embodiments obtained by the person skilled in the art without creative work belong to the protection scope of the present invention.
As shown in figure 1, the utility model provides a hydrogen sulfide tail gas absorbs processing apparatus, including the tail gas absorption unit, alkali lye circulation unit passes through alkali lye pipeline 7 and tail gas absorption unit intercommunication, and the negative pressure is managed to find time the unit and is managed to find time pipeline 5 and tail gas absorption unit intercommunication through the negative pressure.
The tail gas absorption unit includes tail gas absorption tower 3, and 3 sub-unit connections in the tail gas absorption tower have tail gas absorption pipeline 1, and tail gas absorption pipeline 1 is connected with the draught fan, absorbs the tail gas suction tail gas absorption tower 3 that has the hydrogen sulfide in the production system and utilizes.
The tail gas absorption tower 3 comprises a tower body, a liquid distributor 31 is arranged at the top of the tower body, a plurality of tower trays 32 are longitudinally distributed in the tower body, and filler is filled in the tower body and is random packing 33. The random packing 33 blocks the flow of hydrogen sulfide gas, the gas retention time is prolonged, and the NaOH solution is attached to the surface of the packing due to the infiltration effect, so that the gas phase and the liquid phase are fully reacted. The tower tray separates the tower body to prevent the liquid from collecting on the surface of the tower body when flowing downwards to produce wall flow and gas from passing through the tower body to avoid gas-liquid mass transfer. And a defoaming wire mesh is arranged at the top of the tower to prevent the liquid phase from being pumped out by the negative pressure pumping unit.
In some embodiments, the absorption liquid in the tower kettle is controlled to be at the liquid level of 1.0-2.0m, and the pressure of the absorption tower is controlled to be negative pressure of-10 KPa to-5 KPa.
In some embodiments, each tray 32 is associated with a liquid distributor 31 that sprays liquid to increase mass transfer efficiency.
The alkali liquor circulation unit comprises an alkali liquor storage tank 2, the alkali liquor storage tank 2 is communicated with the top of the tail gas absorption tower 3 through an alkali liquor conveying pipeline 7, a water pump 4 is arranged on the alkali liquor conveying pipeline 7, the water pump 4 is a plurality of water pumps connected in parallel, in some embodiments, the number of the water pumps is two, the water pumps 4 are connected in parallel to increase the circulation efficiency, when the hydrogen sulfide treatment amount is less, a part of the water pumps can be closed, and the adjustment is flexible according to the actual production condition.
The concentration of the NaOH solution is 32%, compared with the concentration of 25% NaOH solution in the prior art, the concentration is high, the reaction efficiency is high, alkali liquor is excessive in the running process of the device, the conversion rate of hydrogen sulfide is increased beneficially according to the chemical balance principle, and hydrogen sulfide is effectively absorbed.
The bottom of the tail gas absorption tower 3 is connected with an alkali liquor conveying pipeline 7 and is used for discharging a product sodium hydrosulfide and an unreacted NaOH solution from the tail gas absorption tower 3. The unreacted NaOH solution enters the top of the tail gas absorption tower 3 again for reaction, the utilization rate of the NaOH solution is increased, and because the NaOH solution is excessive and the content of the product sodium hydrosulfide is low, H cannot be caused2S+NaOH＝NaHS+H2The O reaction is carried out in reverse direction. And because sodium hydrosulfide is easy to decompose when meeting acid, the sodium hydrosulfide is mixed with NaOH solution to be beneficial to maintaining the stability of the sodium hydrosulfide.
The alkali liquor conveying pipeline 7 is communicated with a rich liquor absorption pipe 6, and the product sodium hydrosulfide and the unreacted NaOH solution are discharged out of the reaction system and are used for preparing the sodium hydrosulfide. Since the NaOH solution is one of reactants of the sodium hydrosulfide, the mixed solution is directly used for preparing the sodium hydrosulfide without bringing impurities.
The rich liquid absorption pipe 6 is communicated with the water pump 4 in the liquid flowing direction, and the purpose is that the water pump 4 divides the liquid, the water pressure is large, the liquid flows together after the water pump 4, the pressure is small, and the sodium hydrosulfide and the unreacted NaOH solution are generated after the water pump 4 divides the liquid, so that the service life of the pipeline is prolonged.
The negative pressure evacuation unit is communicated with the tail gas absorption tower 3 through a negative pressure evacuation pipeline 5, a plurality of vacuum pumps 8 are arranged on the negative pressure evacuation pipeline 5, the vacuum pumps 8 are connected in parallel, in some embodiments, the number of the vacuum pumps is two, and the vacuum pumps 8 are used for providing negative pressure to evacuate purified air from the top of the tail gas absorption tower 3.
The utility model discloses hydrogen sulfide content around handling has detected, and the result is shown as the following table, from which can see out, and this application is very good to hydrogen sulfide's absorption effect.
TABLE 1 comparison of hydrogen sulfide content in exhaust gas and purified air of production system
| Project index | Composition (I) | Content (wt.) |
| Before treatment | Hydrogen sulfide | 1％ |
| After the treatment of the utility model | Hydrogen sulfide | 3PPM |
The above disclosure is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the scope of the present invention, therefore, the present invention is not limited by the appended claims.
Claims (10)
1. The utility model provides a hydrogen sulfide tail gas absorbs processing apparatus which characterized in that: the system comprises a tail gas absorption unit, an alkali liquor circulation unit is communicated with the tail gas absorption unit through an alkali liquor conveying pipeline, and a negative pressure pumping-out unit is communicated with the tail gas absorption unit through a negative pressure pumping-out pipeline;
the tail gas absorption unit comprises a tail gas absorption tower, and the lower part of the tail gas absorption tower is connected with a tail gas absorption pipeline;
the alkali liquor circulating unit comprises an alkali liquor storage tank, the alkali liquor storage tank is communicated with the top of the tail gas absorption tower through an alkali liquor conveying pipeline, and a water pump is arranged on the alkali liquor conveying pipeline; the negative pressure evacuation unit is communicated with the tail gas absorption tower through a negative pressure evacuation pipeline, and a vacuum pump is arranged on the negative pressure evacuation pipeline.
2. The hydrogen sulfide tail gas absorption treatment device according to claim 1, characterized in that: the tail gas absorption tower comprises a tower body, a liquid distributor is arranged at the top of the tower body, a plurality of tower trays are longitudinally distributed in the tower body, and filler is filled in the tower body and is random packing.
3. The hydrogen sulfide tail gas absorption treatment device according to claim 2, characterized in that: each layer of trays is provided with a liquid distributor.
4. The hydrogen sulfide tail gas absorption treatment device according to claim 2, characterized in that: and a defoaming wire mesh is arranged at the top of the tower.
5. The hydrogen sulfide tail gas absorption treatment device according to claim 1, characterized in that: and the tail gas absorption pipeline is connected with an induced draft fan.
6. The hydrogen sulfide tail gas absorption treatment device according to claim 1, characterized in that: the alkali liquor conveying pipeline is communicated with a rich liquor absorption pipe.
7. The hydrogen sulfide tail gas absorption treatment device according to claim 6, characterized in that: the rich liquid absorption pipe is arranged behind the water pump according to the liquid flowing direction.
8. The hydrogen sulfide tail gas absorption treatment device according to claim 1, characterized in that: the water pumps are a plurality of water pumps distributed in parallel.
9. The hydrogen sulfide tail gas absorption treatment device according to claim 1, characterized in that: the vacuum pump is a plurality of vacuum pumps distributed in parallel.
10. The hydrogen sulfide tail gas absorption treatment device according to claim 1, characterized in that: the negative pressure evacuation line opens directly to the atmosphere.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020451330.3U CN212440721U (en) | 2020-03-31 | 2020-03-31 | Hydrogen sulfide tail gas absorption treatment device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020451330.3U CN212440721U (en) | 2020-03-31 | 2020-03-31 | Hydrogen sulfide tail gas absorption treatment device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN212440721U true CN212440721U (en) | 2021-02-02 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202020451330.3U Active CN212440721U (en) | 2020-03-31 | 2020-03-31 | Hydrogen sulfide tail gas absorption treatment device |
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| CN (1) | CN212440721U (en) |
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2020
- 2020-03-31 CN CN202020451330.3U patent/CN212440721U/en active Active
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