CN210057847U - Device for treating phosphoric acid tail gas - Google Patents
Device for treating phosphoric acid tail gas Download PDFInfo
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- CN210057847U CN210057847U CN201920454269.5U CN201920454269U CN210057847U CN 210057847 U CN210057847 U CN 210057847U CN 201920454269 U CN201920454269 U CN 201920454269U CN 210057847 U CN210057847 U CN 210057847U
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- scrubbing tower
- phosphoric acid
- washing water
- tail gas
- outlet
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Abstract
The utility model discloses a handle phosphoric acid tail gas's device, including the scrubbing tower, the tail gas pipeline that comes from the phosphoric acid workshop section is connected to the air inlet of scrubbing tower lower part, the top is equipped with the scrubbing tower gas outlet, the upper portion of scrubbing tower is equipped with the washing water import, the lower part is equipped with the washing water export, alkali lye circulating tank is equipped with liquid outlet and inlet, the inlet is through the washing water import of alkaline washing pump and pipe connection to scrubbing tower, the washing water export is through the pipe connection to the liquid outlet, the gas outlet of scrubbing tower is through the pipe connection to draught fan air intake, the draught fan air outlet passes through the pipe connection to the defroster air inlet, the gas outlet of defroster is connected with the. By adopting the device, the device has simple structure and reasonable route setting, can effectively treat the tail gas generated in the production process of phosphoric acid, realizes ultralow emission of the tail gas, obviously reduces visual pollution, improves the environment-friendly management image of enterprises and has special social benefits.
Description
Technical Field
The utility model belongs to the chemical industry field relates to the processing of tail gas in the phosphoric acid production process, especially a handle phosphoric acid tail gas's device.
Background
In the production process of phosphoric acid, a large amount of tail gas is generated, and the main component is P2O5And water vapor and the like, the phosphorus-containing gas has strong corrosivity in a gas form or a liquid form, and if the condensate is not recycled, a large amount of resource waste is caused, and soil acidification and water body pollution are also caused, so that vegetation growth, livestock and personal safety and the like are influenced. At present, the environmental protection requirements are becoming stricter, and the treatment of tail gas in the production process of phosphoric acid is very important. At present, a mechanical separator, a fiber demister and the like are commonly adopted in the purification treatment of phosphoric acid production tail gas, the demisting separation efficiency is low, and the discharged tail gas can not meet the emission standard.
Disclosure of Invention
In order to solve the technical problem, the utility model provides a handle phosphoric acid tail gas's device, the treatment effect is good, can reach the emission requirement.
The utility model provides a technical scheme who takes, a handle phosphoric acid tail gas's device, including the scrubbing tower, the tail gas pipe connection who comes from the phosphoric acid workshop section is to the air inlet of scrubbing tower lower part, the scrubbing tower top is equipped with the scrubbing tower gas outlet, the upper portion of scrubbing tower is equipped with the washing water import, the lower part is equipped with the washing water export, the alkali lye circulating tank is equipped with alkali lye circulating tank liquid outlet and alkali lye circulating tank inlet, alkali lye circulating tank liquid outlet is imported through the washing water of alkaline wash pump and pipe connection to scrubbing tower, the washing water export is through pipe connection to alkali lye circulating tank inlet, the gas outlet of scrubbing tower is through pipe connection to draught fan air intake, the draught fan air outlet passes through pipe connection to the defroster air inlet, the gas outlet of defroster is connected.
Furthermore, the alkali liquor circulating pool is also provided with an alkali liquor supplementing opening which is connected with an alkali liquor storage tank through a pipeline.
Further, the scrubbing tower sprays the layer including down, and the upper portion that sprays the layer is equipped with the defogging layer, sprays the layer including with the washing water access connection spray the person in charge, is responsible for and is gone up the intercommunication and has a plurality of branch pipes that spray, the below of spraying the branch pipe evenly is equipped with a plurality of nozzles.
Furthermore, the defogging layer includes silk screen defogging layer and the baffling defogging layer of top below, and baffling defogging layer includes a plurality of parallel arrangement's the board of buckling, and the department of buckling of the board of buckling is equipped with the drainage piece of downwardly extending.
Further, the demister is a wet electrostatic demister.
The utility model discloses following beneficial effect has:
the P in the washing tower is removed by alkali liquor washing and chemical neutralization in a mode of combining the washing tower with an electric demister2O5The washed gas is preliminarily demisted through a demisting layer in the washing tower and then is sent to an electric demister for electrostatic demisting, so that P in tail gas can be effectively removed2O5And water vapor, even other solid particles and the like, thereby realizing the purpose of deep purification and reaching the discharge standard.
The utility model provides an among the scrubbing tower, spray the layer and adopt to spray the setting of being responsible for, spray branch pipe and multiinjector for washing liquid can be evenly distributed in the scrubbing tower, makes the washing liquid that sprays distribute in all positions of scrubbing tower cross section as far as possible, strengthens the washing effect. And the mode of defogging of lower floor's silk screen defogging upper strata baffling defogging is adopted on the defogging layer, through multiple defogging, reinforcing defogging effect reduces the work load of later stage defroster, increase of service life. When the baffling demisting device is designed, the downwards extending diversion sheets are arranged at the bending positions of the bending plates which are arranged in parallel, and liquid drops in gas are intercepted as much as possible through the shielding of the diversion sheets, so that the liquid drops return to the alkali liquor circulation tank through the lower part of the washing tower to circulate.
By adopting the device, the device has simple structure and reasonable route setting, can effectively treat the tail gas generated in the production process of phosphoric acid, realizes ultralow emission of the tail gas, obviously reduces visual pollution, improves the environment-friendly management image of enterprises and has special social benefits.
Drawings
Fig. 1 is a block diagram of the apparatus according to the present invention.
Fig. 2 is a schematic structural diagram of the present invention.
Fig. 3 is a schematic structural diagram of a baffling demisting layer.
Fig. 4 is another schematic structural diagram of the present invention.
Detailed Description
The present invention will be further explained with reference to the following examples and drawings.
As shown in figures 1-3, a device for treating phosphoric acid tail gas, including a washing tower 1, the tail gas pipeline from a phosphoric acid working section 2 is connected to an air inlet 11 at the lower part of the washing tower, a washing tower air outlet 14 is arranged at the top of the washing tower, a washing water inlet 12 is arranged at the upper part of the washing tower, a washing water outlet 13 is arranged at the lower part of the washing tower, an alkali liquor circulating tank 3 is provided with an alkali liquor circulating tank liquid outlet 32 and an alkali liquor circulating tank liquid inlet 31, the alkali liquor circulating tank liquid outlet is connected to the washing water inlet of the washing tower through an alkali wash pump and a pipeline, the washing water outlet is connected to the alkali liquor circulating tank liquid inlet through a pipeline, the air outlet 14 of the washing tower is connected to an air inlet of an induced draft fan 4 through a pipeline, an. The waste water collected after washing and demisting in the demister enters a washing water storage tank and then is used for desulfurization and pulping.
In the preferred scheme, the alkali liquor circulating tank is also provided with an alkali liquor replenishing port 33 which is connected with alkali through a pipelineAnd (4) a liquid storage tank. The tail gas is washed by alkali liquor, so that P in the tail gas can be well removed2O5。
Preferably, the scrubbing tower includes down sprays the layer, sprays the upper portion on layer and is equipped with the defogging layer, sprays the layer and includes the main pipe that sprays that is connected with the washing water inlet, is responsible for and is linked up and has a plurality of spray branch pipes, and spray branch pipe's below evenly is equipped with a plurality of nozzles.
Further preferably, the defogging layer comprises a lower wire mesh defogging layer and an upper baffling defogging layer, the baffling defogging layer comprises a plurality of bending plates 15 which are arranged in parallel, and the bending positions of the bending plates are provided with downwards extending drainage sheets 16.
Preferably, the demister is a wet electrostatic demister.
And a multistage demister can be arranged between the washing tower and the induced draft fan, and a Venturi demister and a double-baffle demister can be arranged as shown in fig. 4. Through multistage defogging, reach the emission up to standard of tail gas.
When the device is used for tail gas treatment, the tail gas from the phosphoric acid working section is collected and then sent to the gas inlet at the lower part of the washing tower, and the tail gas is washed by alkali liquor to remove P contained in the tail gas2O5Impurities such as water vapor; the tail gas after washing contains more liquid drops, the upper part of the washing tower is provided with a washing water inlet, the lower part of the washing tower is provided with a washing water outlet, the alkali liquor circulating tank is provided with a liquid outlet and a baffling demisting device for removing partial liquid drops in the gas, the gas discharged from the washing tower is sent to a wet electrostatic demister through a draught fan, and high-voltage pulse direct current and an electric field are utilized to drive fine smoke dust in the gas to be accelerated and settled on the surface of an anode so as to remove dust particles, fog drops, aerosol containing moisture and the like in the gas, thereby purifying the gas, and the purified tail gas is discharged through a discharge pipe of the demister. And liquid collected by the demister enters a washing water storage tank through a liquid outlet.
The above-mentioned embodiments are merely preferred embodiments of the present invention, and should not be considered as limitations of the present invention, and the protection scope of the present invention should be defined by the technical solutions described in the claims, and includes equivalent alternatives of technical features in the technical solutions described in the claims. Namely, equivalent alterations and modifications within the scope of the invention are also within the scope of the invention.
Claims (5)
1. The utility model provides a handle phosphoric acid tail gas's device which characterized in that: including scrubbing tower (1), the tail gas pipeline that comes from phosphoric acid workshop section (2) is connected to air inlet (11) of scrubbing tower lower part, the scrubbing tower top is equipped with scrubbing tower gas outlet (14), the upper portion of scrubbing tower is equipped with washing water inlet (12), the lower part is equipped with washing water outlet (13), alkali lye circulating pool (3) are equipped with alkali lye circulating pool liquid outlet (32) and alkali lye circulating pool inlet (31), alkali lye circulating pool liquid outlet is through the washing water inlet of alkaline wash pump and pipe connection to scrubbing tower, the washing water outlet is through pipe connection to alkali lye circulating pool inlet, the gas outlet of scrubbing tower is through pipe connection to draught fan (4) air intake, the draught fan air outlet passes through pipe connection to defroster air inlet (5), the gas outlet of defroster is connected with the evacuation pipe, the leakage fluid dram of defroster is.
2. The apparatus for treating phosphoric acid off-gas according to claim 1, wherein: the alkali liquor circulating pool is also provided with an alkali liquor replenishing port (33) which is connected with an alkali liquor storage tank through a pipeline.
3. The apparatus for treating phosphoric acid off-gas according to claim 1, wherein: the scrubbing tower sprays the layer including spraying down, and the upper portion that sprays the layer is equipped with the defogging layer, sprays the layer including with the washing water access connection spray the person in charge, is responsible for and is gone up the intercommunication and has a plurality of spray branch pipes, spray the below of branch pipe and evenly be equipped with a plurality of nozzles.
4. The apparatus for treating phosphoric acid off-gas according to claim 3, wherein: the defogging layer comprises a silk screen defogging layer below and a baffling defogging layer above, the baffling defogging layer comprises a plurality of bending plates (15) arranged in parallel, and the bending positions of the bending plates are provided with downwards extending drainage sheets (16).
5. The apparatus for treating phosphoric acid off-gas according to claim 1, wherein: the demister is a wet electrostatic demister.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920454269.5U CN210057847U (en) | 2019-04-04 | 2019-04-04 | Device for treating phosphoric acid tail gas |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920454269.5U CN210057847U (en) | 2019-04-04 | 2019-04-04 | Device for treating phosphoric acid tail gas |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN210057847U true CN210057847U (en) | 2020-02-14 |
Family
ID=69435887
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201920454269.5U Active CN210057847U (en) | 2019-04-04 | 2019-04-04 | Device for treating phosphoric acid tail gas |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN210057847U (en) |
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2019
- 2019-04-04 CN CN201920454269.5U patent/CN210057847U/en active Active
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