CN220460299U - Hydrochloric acid tail gas absorbing device - Google Patents
Hydrochloric acid tail gas absorbing device Download PDFInfo
- Publication number
- CN220460299U CN220460299U CN202322160576.1U CN202322160576U CN220460299U CN 220460299 U CN220460299 U CN 220460299U CN 202322160576 U CN202322160576 U CN 202322160576U CN 220460299 U CN220460299 U CN 220460299U
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- Prior art keywords
- spray tower
- tail gas
- hydrochloric acid
- liquid
- recovery
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- VEXZGXHMUGYJMC-UHFFFAOYSA-N Hydrochloric acid Chemical compound Cl VEXZGXHMUGYJMC-UHFFFAOYSA-N 0.000 title claims abstract description 154
- 239000007788 liquid Substances 0.000 claims abstract description 106
- 239000007921 spray Substances 0.000 claims abstract description 105
- 238000011084 recovery Methods 0.000 claims abstract description 91
- 238000010521 absorption reaction Methods 0.000 claims abstract description 16
- 239000002253 acid Substances 0.000 claims abstract description 11
- 238000011282 treatment Methods 0.000 claims description 15
- 239000003513 alkali Substances 0.000 claims description 14
- 238000004064 recycling Methods 0.000 claims description 7
- 238000005507 spraying Methods 0.000 claims description 6
- QAOWNCQODCNURD-UHFFFAOYSA-N Sulfuric acid Chemical compound OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 claims description 2
- 230000009102 absorption Effects 0.000 abstract description 11
- 239000003595 mist Substances 0.000 abstract description 5
- 230000003472 neutralizing effect Effects 0.000 abstract 1
- 230000009103 reabsorption Effects 0.000 abstract 1
- 239000007789 gas Substances 0.000 description 50
- 239000000243 solution Substances 0.000 description 10
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Chemical compound O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 4
- 238000005260 corrosion Methods 0.000 description 3
- 230000007797 corrosion Effects 0.000 description 3
- 229910000041 hydrogen chloride Inorganic materials 0.000 description 3
- IXCSERBJSXMMFS-UHFFFAOYSA-N hydrogen chloride Substances Cl.Cl IXCSERBJSXMMFS-UHFFFAOYSA-N 0.000 description 3
- 239000000463 material Substances 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 238000000746 purification Methods 0.000 description 2
- 239000013589 supplement Substances 0.000 description 2
- 230000006750 UV protection Effects 0.000 description 1
- 239000012670 alkaline solution Substances 0.000 description 1
- 239000007864 aqueous solution Substances 0.000 description 1
- 239000002585 base Substances 0.000 description 1
- 238000004090 dissolution Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000011152 fibreglass Substances 0.000 description 1
- 238000011221 initial treatment Methods 0.000 description 1
- 230000003993 interaction Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000006386 neutralization reaction Methods 0.000 description 1
- 230000004224 protection Effects 0.000 description 1
- 230000009469 supplementation Effects 0.000 description 1
Abstract
The utility model discloses a hydrochloric acid tail gas absorbing device, which comprises a first spray tower and a second spray tower; the recovery tank is connected between the first spray tower and the second spray tower; the hydrochloric acid tail gas enters the first spray tower from the bottom of the first spray tower, and is mixed with circulating liquid input into the first spray tower from the recovery tank in the first spray tower; and conveying unabsorbed tail gas from the top of the first spray tower to a recovery tank for reabsorption, leading the tail gas after secondary absorption in the recovery tank to a second spray tower, and neutralizing and absorbing hydrochloric acid in the tail gas by the second spray tower. According to the utility model, the tail gas discharged from the first spray tower is recovered through the recovery tank, acid mist carried in the hydrochloric acid tail gas is dissolved and absorbed in the recovery tank, and the recovery liquid in the recovery tank is used as circulation to be supplemented again, so that the consumption of the circulation liquid is greatly reduced, and the recovery efficiency of hydrochloric acid is improved.
Description
Technical Field
The utility model relates to a hydrochloric acid tail gas recovery technology, in particular to a hydrochloric acid tail gas absorption device.
Background
Hydrochloric acid is an aqueous solution of hydrogen chloride and has wide industrial application. The concentrated hydrochloric acid (the mass fraction is about 37%) has extremely strong volatility, so that hydrogen chloride gas volatilizes after a container filled with the concentrated hydrochloric acid is opened, and the hydrogen chloride gas is combined with water vapor in the air to generate small drops of hydrochloric acid, so that acid mist appears above a bottle mouth. A hydrochloric acid tail gas absorbing device is usually arranged in the hydrochloric acid storage tank, and the hydrochloric acid tail gas is transferred out of the hydrochloric acid storage tank and then is correspondingly treated.
In the prior art, pure water is mostly adopted for recycling hydrochloric acid in a hydrochloric acid tail gas treatment mode, acid mist is not easy to deposit to the bottom of a spray tower due to special hydrochloric acid characteristics, a large amount of circulating liquid is required to be input for circulating absorption, and a large amount of hydrochloric acid escapes after forming the acid mist, so that the recycling efficiency is low.
Disclosure of Invention
The utility model aims to provide a hydrochloric acid tail gas absorbing device to solve the technical problems in the prior art, and the hydrochloric acid tail gas absorbing device can reduce the consumption of circulating liquid and improve the recycling efficiency of hydrochloric acid.
The utility model provides a hydrochloric acid tail gas absorbing device, which is used for hydrochloric acid tail gas absorbing treatment and comprises the following components:
a first spray tower and a second spray tower;
the recovery tank is connected between the first spray tower and the second spray tower, and the recovery tank conveys circulating liquid into the first spray tower through a pipeline;
the alkali liquor tank is used for conveying circulating alkali liquor to the second spray tower through a pipeline, and the circulating alkali liquor neutralizes and absorbs hydrochloric acid in tail gas;
the hydrochloric acid tail gas enters the first spray tower from the bottom of the first spray tower, and is mixed with circulating liquid input into the first spray tower from the recovery tank in the first spray tower; the unabsorbed tail gas is conveyed to a recovery tank from the top of the first spray tower for re-absorption, the tail gas after the secondary absorption in the recovery tank is led to a second spray tower, and hydrochloric acid in the tail gas is neutralized and absorbed by circulating alkali liquor; and the acid liquor is recovered by the first spray tower and is discharged and recovered from the bottom of the first spray tower.
Preferably, the recovery tank is provided with a first liquid outlet, an air inlet pipe and an air outlet pipe, the tail gas conveyed by the top of the first spray tower enters the recovery tank, the tail gas absorbed by hydrochloric acid is sent to the second spray tower from the air outlet pipe, and the recovery liquid arranged in the recovery tank is used as circulating liquid to be supplemented into the first spray tower after absorbing the hydrochloric acid.
Preferably, the recovery tank is further provided with a liquid inlet and a second liquid outlet, a pH value sensor is arranged in the recovery tank, and when the recovery liquid in the recovery tank meets the pH value recovery standard, the recovery liquid is discharged from the second liquid outlet for storage and is replenished through the liquid inlet.
Preferably, a liquid discharge valve is arranged at the bottom of the first spray tower, a liquid level sensor and a pH value sensor are arranged in the first spray tower, and when the pH value of circulating liquid in the first spray tower meets the recovery standard, the liquid discharge valve is used for starting the recovery circulating liquid for storage, and after the recovery is finished, the circulating liquid is supplemented through a recovery tank.
Preferably, the air inlet pipe extends to below the liquid level of the recovery liquid in the recovery tank, and the air outlet pipe is higher than the liquid level of the recovery liquid.
Preferably, the front end of the first spray tower is provided with a first induced draft fan, the first induced draft fan sends hydrochloric acid tail gas into the first spray tower, the front end of the first spray tower is provided with a second induced draft fan, and the second induced draft fan sends the hydrochloric acid tail gas released by the recovery tank into the second spray tower.
Compared with the prior art, the method has the advantages that the tail gas discharged from the inside of the first spray tower is recovered through the recovery tank, acid mist carried in the hydrochloric acid tail gas is dissolved and absorbed in the recovery tank, and the recovery liquid in the recovery tank is used as the circulating liquid to be supplemented to the first spray tower again to be used as the circulating liquid for secondary utilization, so that the consumption of the circulating liquid is reduced, the recovery efficiency of hydrochloric acid is improved, and meanwhile, the concentration of the recovered hydrochloric acid is ensured to meet certain requirements.
Drawings
FIG. 1 is a schematic illustration of the process flow of the present utility model;
FIG. 2 is a schematic view of a recovery tank of the present utility model;
reference numerals illustrate:
100. a recovery tank; 110. a cover plate; 120. a liquid storage tank; 121. a liquid inlet; 122. a first liquid outlet; 123. a second liquid outlet; 131. an air inlet pipe; 132. an air outlet pipe; 210. a first spray tower; 220. a second spray tower; 300. a base tank; 410. a first induced draft fan; 420. a second induced draft fan; 430. a first circulation pump; 440. and a second circulation pump.
Detailed Description
Embodiments of the technical solutions of the present application will be described in detail below with reference to the accompanying drawings. The following examples are only for more clearly illustrating the technical solutions of the present application, and thus are only examples, and are not intended to limit the scope of protection of the present application.
Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs; the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the application; the terms "comprising" and "having" and any variations thereof in the description and claims of the present application and in the description of the figures above are intended to cover non-exclusive inclusions.
In the description of the embodiments of the present application, the technical terms "first," "second," etc. are used merely to distinguish between different objects and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated, a particular order or a primary or secondary relationship. In the description of the embodiments of the present application, the meaning of "plurality" is two or more unless explicitly defined otherwise.
Reference herein to "an embodiment" means that a particular feature, structure, or characteristic described in connection with the embodiment may be included in at least one embodiment of the present application. The appearances of such phrases in various places in the specification are not necessarily all referring to the same embodiment, nor are separate or alternative embodiments mutually exclusive of other embodiments. Those of skill in the art will explicitly and implicitly appreciate that the embodiments described herein may be combined with other embodiments.
In the description of the embodiments of the present application, the term "and/or" is merely an association relationship describing an association object, which means that three relationships may exist, for example, a and/or B may mean: a exists alone, A and B exist together, and B exists alone. In addition, the character "/" herein generally indicates that the front and rear associated objects are an "or" relationship.
In the description of the embodiments of the present application, the term "plurality" refers to two or more (including two), and similarly, "plural sets" refers to two or more (including two), and "plural sheets" refers to two or more (including two).
In the description of the embodiments of the present application, the orientation or positional relationship indicated by the technical terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. are based on the orientation or positional relationship shown in the drawings, and are merely for convenience of describing the embodiments of the present application and for simplifying the description, rather than indicating or implying that the apparatus or element referred to must have a specific orientation, be configured and operated in a specific orientation, and therefore should not be construed as limiting the embodiments of the present application.
In the description of the embodiments of the present application, unless explicitly specified and limited otherwise, the terms "mounted," "connected," "secured" and the like are to be construed broadly and may be, for example, fixedly connected, detachably connected, or integrally formed; or may be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communicated with the inside of two elements or the interaction relationship of the two elements. The specific meaning of the above terms in the embodiments of the present application will be understood by those of ordinary skill in the art according to the specific circumstances.
As shown in fig. 1-2, an embodiment of the present utility model provides a hydrochloric acid tail gas absorption device for hydrochloric acid tail gas absorption treatment, including:
a first spray tower 210 and a second spray tower 220;
a recovery tank 100, wherein the recovery tank 100 is connected between the first spray tower 210 and the second spray tower 220, and the recovery tank 100 conveys circulating liquid into the first spray tower 210 through a pipeline, and hydrochloric acid in the hydrochloric acid tail gas is absorbed by the circulating liquid;
the alkali liquor tank 300 is used for conveying circulating alkali liquor to the second spray tower 220 through a pipeline, and the circulating alkali liquor neutralizes and absorbs hydrochloric acid in tail gas;
the hydrochloric acid tail gas enters the first spray tower 210 from the bottom of the first spray tower 210, and is mixed with the circulating liquid input into the first spray tower 210 by the recovery tank 100 in the first spray tower 210; the unabsorbed tail gas is conveyed to a recovery tank 100 from the top of a first spray tower 210 for re-absorption, the tail gas after the secondary absorption in the recovery tank 100 is led to a second spray tower 220, and hydrochloric acid in the tail gas is neutralized and absorbed by circulating alkali liquor; the acid liquid recovered from the bottom of the first spray tower 210 is periodically recovered;
in the technical solution of the embodiment of the present application, the first spray tower 210 uses a circulating liquid to recover the medium gas of the hydrochloric acid tail gas, so that hydrochloric acid molecules are dissolved in the circulating liquid and deposited in the first spray tower 210, the hydrochloric acid tail gas after primary treatment is conveyed to the recovery tank 100 again to be directly absorbed by the circulating liquid in the recovery tank 100, meanwhile, the recovering liquid recovered by the recovery tank 100 for the second time is supplemented to the first spray tower 210 to be used as the circulating liquid, when the liquid level or the ph value of the circulating liquid accumulated at the bottom of the first spray tower 210 exceeds a preset value, the circulating liquid is led out from the first spray tower 210, then the recovering liquid in the recovery tank 100 is supplemented to the first spray tower 210 to be used as the circulating liquid, the hydrochloric acid recovered by the recovery tank 100 for the second time is returned to the first spray tower 210 to be accumulated, and the circulating liquid is supplemented to the recovery tank 100 after the liquid level of the recovery tank 100 is lowered, so as to obtain the hydrochloric acid;
the investment of circulating liquid is reduced through layer-by-layer recovery treatment and secondary utilization, so that the energy consumption of equipment is reduced, and meanwhile, the efficiency of hydrochloric acid recovery treatment is improved;
in the technical solution of this embodiment of the present application, the second spray tower 220 performs absorption treatment on the stable hydrochloric acid tail gas discharged from the recovery tank 100, and performs neutralization treatment on hydrochloric acid in the tail gas by using the alkaline solution tank 300 sprayed by the second spray tower 220 device, so as to reduce the pressure of subsequent tail gas treatment, and since the hydrochloric acid content in the hydrochloric acid tail gas after the secondary recovery treatment is already low, the second spray tower 220 performs further purification treatment, so as to improve the purification treatment effect;
in the technical solution of this embodiment of the present application, the first spray tower 210 and the second spray tower 220 all adopt the prior art means, the first spray tower 210, the second spray tower 220 and the pipeline material use the PP material with strong acid and alkali corrosion resistance and ultraviolet resistance, the specifications of the first spray tower 210 and the second spray tower 220 are DN1700 x 6000, and the storage in the tower is about 2.5m 3 Circulating water, filling material of DN50 pall ring, and treated air volume of 1200m 3 /h。
In the embodiment provided by the application, a first induced draft fan 410 is disposed at the front end of the first spray tower 210, the first induced draft fan 410 sends hydrochloric acid tail gas from the bottom of the first spray tower 210, a first circulating pump 430 is disposed at the bottom of the first spray tower 210, and the first circulating pump 430 conveys circulating liquid at the bottom of the first spray tower 210 to the top of the first spray tower 210 for spraying and then is mixed with the hydrochloric acid tail gas for contact absorption of hydrochloric acid;
in the technical solution of the embodiment of the present application, the first circulating pump 430 is a polytetrafluoroethylene-lined centrifugal pump, which is resistant to acid and alkali corrosion, and the fan blades of the first induced draft fan 410 are made of glass fiber reinforced plastic, so that corrosion resistance to hydrochloric acid tail gas is improved;
in the embodiment provided by the application, the second induced draft fan 420 is arranged at the front end of the second spray tower 220, the second induced draft fan 420 conveys the tail gas in the recovery tank 100 into the second spray tower 220, the second circulating pump 440 arranged at the bottom of the second spray tower 220 sends the alkaline liquid tank 300 into the alkaline liquid to be mixed with the tail gas, hydrochloric acid in the tail gas is neutralized and hydrolyzed, the hydrochloric acid content in the tail gas is further reduced, and the pressure of the subsequent treatment process is reduced;
in the technical solution of the embodiment of the present application, the first induced draft fan 410 and the second induced draft fan 420 have the same structure, and the first circulation pump 430 and the second circulation pump 440 have the same structure;
in the embodiment provided by the application, a liquid level sensor and a ph sensor are arranged at the bottom of the first spray tower 210, the liquid level sensor and the ph sensor continuously detect the quantity and the ph of the circulating liquid accumulated in the first spray tower 210, and when the ph of the circulating liquid reaches a certain standard, the circulating liquid is discharged and collected as acid liquid for use, and when the circulating liquid is discharged to a certain liquid level, the recovering tank 100 supplements the recovering liquid to the first spray tower 210 as the circulating liquid for supplementation;
in the embodiment provided by the application, the recovery tank 100 is composed of a cover plate 110 and a liquid storage tank 120, the liquid storage tank 120 is provided with a liquid inlet 121, a first liquid outlet 122 and a second liquid outlet 123, the cover plate 110 is provided with an air inlet pipe 131 and an air outlet pipe 132, the first liquid outlet 122 is communicated with the first spray tower 210, the air inlet pipe 131 is communicated with the top of the first spray tower 210, and the air outlet pipe 132 is communicated with a second induced draft fan 420;
in the technical solution of the embodiment of the present application, the air inlet pipe 131 introduces the tail gas discharged from the top of the first spray tower 210, and the tail gas hydrochloric acid is fused into the recovery liquid through dissolution and absorption of the recovery liquid, and the second liquid outlet 123 directly performs recovery treatment after the ph of the recovery liquid reaches a certain standard, and when the ph of the recovery liquid does not meet the recovery standard, the recovered liquid is sent into the first spray tower 210 to be used as the absorption hydrochloric acid of the circulation liquid when the circulation liquid is replenished; the recovery tank 100 supplements recovery liquid through a liquid inlet 121; the recovery liquid can be pure water or dilute hydrochloric acid solution;
in the technical solution of the embodiment of the present application, the air inlet pipe 131 extends below the liquid level of the recovery liquid in the liquid storage tank 120, the air outlet pipe 132 is higher than the liquid level of the recovery liquid, the air inlet pipe 131 introduces the tail gas into the recovery liquid, and the air outlet pipe 132 sends the tail gas in the recovery tank 100 out, and the tail gas is sent to the second spray tower 220 by the second induced draft fan 420 for further treatment;
the foregoing description of the preferred embodiments of the utility model should not be taken as limiting the scope of the utility model, but all changes and modifications that come within the meaning and range of equivalents of the utility model are intended to be embraced therein.
Claims (7)
1. A hydrochloric acid tail gas absorbing device for hydrochloric acid tail gas absorbing treatment, which is characterized by comprising:
a first spray tower and a second spray tower;
the recovery tank is connected between the first spray tower and the second spray tower, and the recovery tank conveys circulating liquid into the first spray tower through a pipeline;
the alkali liquor tank is used for conveying circulating alkali liquor to the second spray tower through a pipeline, and the circulating alkali liquor neutralizes and absorbs hydrochloric acid in tail gas;
the hydrochloric acid tail gas enters the first spray tower from the bottom of the first spray tower, and is mixed with circulating liquid input into the first spray tower from the recovery tank in the first spray tower; the unabsorbed tail gas is conveyed to a recovery tank from the top of the first spray tower for re-absorption, the tail gas after the secondary absorption in the recovery tank is led to a second spray tower, and hydrochloric acid in the tail gas is neutralized and absorbed by circulating alkali liquor; and the acid liquor is recovered by the first spray tower and is discharged and recovered from the bottom of the first spray tower.
2. The hydrochloric acid tail gas absorbing device according to claim 1, wherein the recycling tank is provided with a first liquid outlet, an air inlet pipe and an air outlet pipe, the tail gas conveyed from the top of the first spraying tower enters the recycling tank, the tail gas after hydrochloric acid absorption is sent to the second spraying tower from the air outlet pipe, and the recycling liquid in the recycling tank is used as circulating liquid to be supplemented into the first spraying tower after hydrochloric acid is absorbed.
3. The hydrochloric acid tail gas absorbing device according to claim 2, wherein the recovery tank is further provided with a liquid inlet and a second liquid outlet, a pH value sensor is arranged in the recovery tank, and when the recovery liquid in the recovery tank meets the pH value recovery standard, the recovery liquid is discharged from the second liquid outlet for storage and is replenished through the liquid inlet.
4. A hydrochloric acid tail gas absorbing device according to claim 3, wherein a liquid discharge valve is arranged at the bottom of the first spray tower, a liquid level sensor and a PH value sensor are arranged in the first spray tower, and when the PH value of circulating liquid in the first spray tower meets the recovery standard, the liquid discharge valve opens the recovery circulating liquid for storage, and the circulating liquid is replenished through a recovery tank after the recovery is finished.
5. The apparatus of claim 4, wherein the inlet pipe extends below the level of the recovery liquid in the recovery tank, and the outlet pipe is above the level of the recovery liquid.
6. The hydrochloric acid tail gas absorbing device according to claim 1, wherein a first induced draft fan is arranged at the front end of the first spray tower, and the first induced draft fan sends the hydrochloric acid tail gas into the first spray tower.
7. The hydrochloric acid tail gas absorbing device according to claim 1, wherein a second induced draft fan is arranged at the front end of the first spraying tower, and the second induced draft fan sends the hydrochloric acid tail gas released by the recovery tank into the second spraying tower.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202322160576.1U CN220460299U (en) | 2023-08-11 | 2023-08-11 | Hydrochloric acid tail gas absorbing device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202322160576.1U CN220460299U (en) | 2023-08-11 | 2023-08-11 | Hydrochloric acid tail gas absorbing device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN220460299U true CN220460299U (en) | 2024-02-09 |
Family
ID=89805499
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202322160576.1U Active CN220460299U (en) | 2023-08-11 | 2023-08-11 | Hydrochloric acid tail gas absorbing device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN220460299U (en) |
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2023
- 2023-08-11 CN CN202322160576.1U patent/CN220460299U/en active Active
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