CN210057852U - Treatment device for flue gas generated after combustion of yellow phosphorus tail gas - Google Patents
Treatment device for flue gas generated after combustion of yellow phosphorus tail gas Download PDFInfo
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- CN210057852U CN210057852U CN201920454330.6U CN201920454330U CN210057852U CN 210057852 U CN210057852 U CN 210057852U CN 201920454330 U CN201920454330 U CN 201920454330U CN 210057852 U CN210057852 U CN 210057852U
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Abstract
The utility model discloses a processing apparatus of yellow phosphorus tail gas burning back flue gas, including the flue gas collecting pipe way, it is connected to the desulfurizing tower, and the tail gas outlet of desulfurizing tower is connected to the air inlet of alkali wash tower, and the alkali wash tower top is equipped with the gas outlet, and the alkali wash tower top is equipped with the washing liquid import, and the below is equipped with the washing liquid export, and the washing liquid export is connected to circulation tank liquid return mouth through the pipeline, and the liquid outlet of circulation tank is connected to the washing liquid import of alkali wash tower behind pipeline, pump and the condenser; the gas outlet of the alkaline washing tower is connected to an induced draft fan through a pipeline, the induced draft fan is connected to an electric demister, and the electric demister is provided with an evacuation pipeline communicated with the outside. The device adopts the technology of double-alkali desulfurization, alkali washing and electrostatic demisting to collect, process and discharge the flue gas after combustion of the tail gas generated in the production of the yellow phosphorus electric furnace, and the route is reasonable. Can realize the environmental-friendly emission of the smoke reaching the standard, reduce the visual pollution, improve the working environment and have obvious environmental protection benefit and social benefit.
Description
Technical Field
The utility model belongs to the chemical industry field relates to the recycle of yellow phosphorus tail gas, especially a processing apparatus of yellow phosphorus tail gas burning back flue gas.
Background
The main component of the tail gas of the yellow phosphorus electric furnace is CO, and the tail gas can be used as fuel required by the production of phosphate products. After the tail gas of the yellow phosphorus electric furnace is combusted, a large amount of SO can be formedXAnd NOXAfter the desulfurization and denitrification treatment by the double alkali method, the combustion flue gas can reach the standard and be discharged. However, the dual-alkali desulfurization method has the disadvantages that the process control is unstable, the fluctuation of the content of pollutants in the flue gas is large, and certain environmental protection hidden dangers exist, and the discharge is carried out after the dual-alkali desulfurization and denitrification, so that a large amount of white strip-shaped smoke columns can be seen, serious visual pollution is caused, and severe social influence is brought. Therefore, the treatment of the yellow phosphorus tail gas combustion flue gas needs to be further enhanced, and the emission of the yellow phosphorus tail gas is stable and reaches the standard, even the emission is ultralow, and simultaneouslyAnd visual pollution is effectively eliminated.
Disclosure of Invention
In order to solve the technical problem, the utility model provides a processing apparatus of yellow phosphorus tail gas burning back flue gas, the treatment effect is good, can reach the emission requirement.
The technical scheme that the utility model adopts is, a processing apparatus of yellow phosphorus tail gas burning back flue gas, including the flue gas collecting pipe way, it is connected to the desulfurizing tower, and the tail gas outlet of desulfurizing tower is connected to the air inlet of alkali wash tower, and the alkali wash tower top is equipped with the gas outlet, and the alkali wash tower top is equipped with the washing liquid import, and the below is equipped with the washing liquid export, and the washing liquid export is connected to circulation tank liquid return mouth through the pipeline, and the liquid outlet of circulation tank is connected to the washing liquid import of alkali wash tower behind pipeline, pump and the condenser; the gas outlet of the alkaline washing tower is connected to an induced draft fan through a pipeline, the induced draft fan is connected to an electric demister, and the electric demister is provided with an evacuation pipeline communicated with the outside.
Further, the desulfurizing tower is provided with a water mist catcher which is specifically arranged below the tail gas outlet.
Furthermore, the water mist catcher is of a baffle plate type and/or pipe type demisting structure.
Furthermore, the device also comprises a lime slurry tank, wherein a discharge port of the lime slurry tank is communicated with a liquid inlet of the desulfurizing tower through a pump, and a liquid outlet of the desulfurizing tower is communicated with a feed inlet of the lime slurry tank to form a circulating loop; the lime slurry groove is also connected with a water inlet pipe and a quicklime supplementing pipeline.
Further, a fan is further installed on the smoke collecting pipeline.
Further, the electric demister is a wet electrostatic demister.
The utility model discloses following beneficial effect has:
collecting the combustion flue gas of the yellow phosphorus tail gas, feeding the flue gas into a desulfurizing tower, desulfurizing and denitrating by adopting a double alkali method, emulsifying by utilizing CaO to form Ca (OH)2And the pH value is adjusted to be about 9, so that the acidic gas components in the smoke can be fully absorbed. The spray tower is provided with a water mist catcher, and water vapor is recycled through the water mist catcher. Desulfurization and denitrificationThe tower flue gas is sent into an alkaline washing tower for washing, part of high-temperature water vapor, lime slurry and the like are removed, and the content of acid gas in tail gas is further reduced; condensing and cooling spray water by adopting a condenser; due to the entrainment of gas and liquid, the spray water in the circulating pool needs to be supplemented and increased in real time, and alkali liquor with the mass concentration of 30-40% is added for treatment, and the PH value is adjusted to be more than 6.5. Flue gas from the alkaline washing tower enters a wet electrostatic demister through a draught fan, and fine smoke dust in the flue gas is driven by high-voltage pulse direct current and an electric field 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 flue gas, thereby achieving the purification of the flue gas.
By adopting the device, the structure is simple, the flue gas generated after combustion of the tail gas generated in the production of the yellow phosphorus electric furnace is collected, treated and discharged by adopting the processes of double-alkali desulphurization, alkali washing and electrostatic demisting, and the route is reasonable to set. The scheme can realize the environment-friendly emission of the smoke reaching the standard, reduce visual pollution, improve the operating environment and have obvious environmental protection benefit and social benefit.
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.
Detailed Description
The present invention will be further explained with reference to the following examples and drawings.
As shown in fig. 1-2, a device for treating flue gas after combustion of yellow phosphorus tail gas comprises a flue gas collecting pipeline 1 connected to a desulfurizing tower 2, a tail gas outlet of the desulfurizing tower is connected to an air inlet of an alkaline washing tower 3, an air outlet is arranged at the top of the alkaline washing tower, a washing liquid inlet is arranged above the alkaline washing tower, a washing liquid outlet is arranged below the alkaline washing tower, the washing liquid outlet is connected to a liquid return port of a circulation tank 4 through a pipeline, a pump and a condenser 5, and then the liquid outlet of the circulation tank is connected to the washing liquid inlet of the alkaline washing tower; the gas outlet of the alkaline washing tower is connected to an induced draft fan 6 through a pipeline, the induced draft fan is connected to an electric demister 7, and the electric demister is provided with an emptying pipeline communicated with the outside. The desulfurizing tower is an FGD device and adopts Ca (OH)2The aim of simultaneously desulfurizing and denitrating is achieved. Desulfurization by wet methodThe normal pH value is controlled to be 5.2-5.8 and is weakly acidic, and the alkaline washing is performed again through a desulfurizing tower and an alkaline washing tower, so that the alkaline washing spraying area is increased. Can reduce the corrosion of slurry acidity to equipment, simultaneously cool flue gas and additionally carry out SO2The control plays a certain auxiliary role.
In the preferred scheme, the desulfurizing tower is provided with a water mist catcher which is specifically arranged below the tail gas outlet. At present, the water mist catcher is a baffle plate type or a pipe type demister.
In the preferred scheme, the device also comprises a lime slurry tank 8, wherein a discharge port of the lime slurry tank is communicated with a liquid inlet of the desulfurizing tower through a pump, and a liquid outlet of the desulfurizing tower is communicated with a feed inlet of the lime slurry tank to form a circulating loop; the lime slurry groove is also connected with a water inlet pipe and a quicklime supplementing pipeline.
In the preferred scheme, a fan is further installed on the flue gas collecting pipeline 1.
In the preferred scheme, a fan is also arranged between the flue gas collecting pipeline and the desulfurizing tower.
When the device is used for flue gas treatment, flue gas generated by combustion of yellow phosphorus combustion tail gas in each section is collected and gathered to a desulfurization tower through a fan, and desulfurization and denitrification treatment is carried out by adopting a double alkali method; the flue gas out of the desulfurizing tower enters an alkaline washing tower for spraying and alkaline washing; the spray liquid in the circulating pool is cooled by a condenser and then enters an alkaline washing tower, so that the capture effect on the superheated water vapor is enhanced while alkaline washing is ensured; after the flue gas is subjected to alkali washing, the flue gas is sent into a wet electrostatic demister through a draught fan to be treated, solid particles and aerosol in the flue gas are removed, and visual pollution caused by the emission of the flue gas is eliminated. The standard emission of the flue gas can be realized through desulfurization and denitrification by a double alkali method and circulating alkali washing; through the electrostatic defogging treatment, the visual pollution of smoke emission can be eliminated. In addition, can also be at
The wet electrostatic demister exhaust pipeline is provided with the smoke emission online monitoring device, so that the high level of the discharged smoke is ensured to reach the standard.
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 (6)
1. The utility model provides a processing apparatus of yellow phosphorus tail gas burning back flue gas which characterized in that: the device comprises a flue gas collecting pipeline (1), wherein the flue gas collecting pipeline is connected to a desulfurizing tower (2), a tail gas outlet of the desulfurizing tower is connected to a gas inlet of an alkaline washing tower (3), a gas outlet is formed in the top of the alkaline washing tower, a washing liquid inlet is formed in the upper part of the alkaline washing tower, a washing liquid outlet is formed in the lower part of the alkaline washing tower, the washing liquid outlet is connected to a liquid return port of a circulating pool (4) through a pipeline, and a liquid outlet of the circulating pool is connected to a washing liquid inlet of the alkaline washing; the gas outlet of the alkaline washing tower is connected to an induced draft fan (6) through a pipeline, the induced draft fan is connected to an electric demister (7), and the electric demister is provided with an emptying pipeline communicated with the outside.
2. The device for treating the flue gas generated after the combustion of the yellow phosphorus tail gas as claimed in claim 1, wherein: the desulfurizing tower is provided with a water mist catcher which is specifically arranged below the tail gas outlet.
3. The device for treating the flue gas generated after the combustion of the yellow phosphorus tail gas as claimed in claim 2, wherein: the water mist catcher is of a baffle plate type and/or pipe type demisting structure.
4. The device for treating the flue gas generated after the combustion of the yellow phosphorus tail gas as claimed in claim 1, wherein: the device also comprises a lime slurry tank (8), wherein a discharge port of the lime slurry tank is communicated with a liquid inlet of the desulfurizing tower through a pump, and a liquid outlet of the desulfurizing tower is communicated with a feed inlet of the lime slurry tank to form a circulating loop; the lime slurry groove is also connected with a water inlet pipe and a quicklime supplementing pipeline.
5. The device for treating the flue gas generated after the combustion of the yellow phosphorus tail gas as claimed in claim 1, wherein: the smoke collecting pipeline (1) is also provided with a fan.
6. The device for treating the flue gas generated after the combustion of the yellow phosphorus tail gas as claimed in claim 1, wherein: the electric demister is a wet-type electrostatic demister.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920454330.6U CN210057852U (en) | 2019-04-04 | 2019-04-04 | Treatment device for flue gas generated after combustion of yellow phosphorus tail gas |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920454330.6U CN210057852U (en) | 2019-04-04 | 2019-04-04 | Treatment device for flue gas generated after combustion of yellow phosphorus tail gas |
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| CN210057852U true CN210057852U (en) | 2020-02-14 |
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| CN201920454330.6U Active CN210057852U (en) | 2019-04-04 | 2019-04-04 | Treatment device for flue gas generated after combustion of yellow phosphorus tail gas |
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| CN (1) | CN210057852U (en) |
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2019
- 2019-04-04 CN CN201920454330.6U patent/CN210057852U/en active Active
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