CN204911189U - Device of hydrogen phosphate in desorption yellow phosphoric tail gas - Google Patents
Device of hydrogen phosphate in desorption yellow phosphoric tail gas Download PDFInfo
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- CN204911189U CN204911189U CN201520646483.2U CN201520646483U CN204911189U CN 204911189 U CN204911189 U CN 204911189U CN 201520646483 U CN201520646483 U CN 201520646483U CN 204911189 U CN204911189 U CN 204911189U
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Abstract
The utility model relates to a tail gas treatment technology field provides a device of hydrogen phosphate in desorption yellow phosphoric tail gas, including concentrated sulfuric acid storage tank, pickling tower, caustic wash tower and alkali lye storage tank, the pickling tower is provided with tail gas import, concentrated sulfuric acid import, spent acid export and tail gas export, the caustic wash tower is provided with gas feed, gas outlet, alkali lye import and salkali waste export, concentrated sulfuric acid storage tank communicates through the pipeline with concentrated sulfuric acid import, the pipeline intercommunication is passed through with gas feed to the tail gas export, the alkali lye storage tank communicates through the pipeline with the alkali lye import. This device has realized the purpose of complete desorption hydrogen phosphate among the useless sulfuric acid solution in the pickling tower, containing phosphoric acid, can be used to produce phosphorus fertilizer, only contain sodium sulphate and sodium hydrosulphite in the salkali waste solution, can be used to produce the glauber's salt, avoided the three wastes to discharge and produce secondary pollution's problem to the environment.
Description
Technical field
The utility model relates to tail gas disposal technique field, especially a kind of device removing hydrogen phosphide in yellow phosphoric tail gas.
Background technology
Yellow phosphorus is yellow waxy solid, and matter is soft, water insoluble, is slightly soluble in alcohol, is dissolved in liquid caustic soda, benzene, ether, chloroform, toluene, is soluble in carbon disulfide; Be a kind of important basic industries raw material, be mainly used in multiple field such as chemical industry, agricultural chemicals.
At present, the production of yellow phosphorus all adopts high temperature reduction method, raw material is rock phosphate in powder, silica and coke, during production, rock phosphate in powder, silica and coke are dropped into electric furnace with granularity by a certain percentage, under the high temperature of degree more than 1000, the phosphorus of oxidation state is reduced into elemental phosphorous steam, after supercooling, rinsing, obtain product again, high temperature furnace slag is directly discharged from electric furnace, and the gas of discharging in production process is yellow phosphoric tail gas.
Phosphorus production industry belongs to highly energy-consuming, high pollution, high-risk industry, the constituent of yellow phosphoric tail gas is very complicated, be mainly carbon monoxide, account for 80 ~ 92%, next is hydrogen, oxygen, carbon dioxide, methane and Small molecular hydro carbons, be about tens percent, pollutant component has hydrogen sulfide, sulphur carbonoxide, carbon disulfide, methyl mercaptan, hydrogen phosphide, hydrogen cyanide, elemental phosphorous and fine solid particle.Wherein, concentration of hydrogen sulfide about 15000 ~ 20000PPm, sulphur carbonoxide concentration about 2200 ~ 2500PPm, Carbon Disulfide about 300 ~ 400PPm, phosphine concentration about 650 ~ 800PPm.The purification treatment technology that yellow phosphoric tail gas removes pollutant is very complicated and difficult, only remove the hydrogen phosphide of one of pollutant, the method studied in the world nearly more than 20 is planted, the de-hydrogen phosphide technology only two kinds that wherein industrialization is commissioned: one is Temp .-changing adsorption technology, adsorbent adopts active carbon, the test run initial stage, hydrogen phosphide removal efficiency was less than 20 ~ 30%, and run after two months, removal efficiency is reduced to less than 5%; Another kind is fixed bed catalytic oxidation technology, and catalyst adopts the solid metal oxide with oxidisability, and after device trys a period of time out, catalyst wraps up with regard to the phosphate of oxidized generation, loses dephosphorization hydrogen activity.
Utility model content
Technical problem to be solved in the utility model is to provide a kind of device removing hydrogen phosphide in yellow phosphoric tail gas that can remove whole hydrogen phosphide.
The utility model solves the technical scheme that its technical problem adopts: the device removing hydrogen phosphide in yellow phosphoric tail gas, comprise concentrated sulfuric acid storage tank, pickling tower, caustic wash tower and alkali lye storage tank, described pickling tower is provided with inlet exhaust gas, concentrated sulfuric acid import, spent acid outlet and offgas outlet, described caustic wash tower is provided with gas feed, gas vent, alkali lye import and salkali waste outlet, pipeline communication is passed through in described concentrated sulfuric acid storage tank and concentrated sulfuric acid import, described offgas outlet and gas feed are by pipeline communication, and pipeline communication is passed through in described alkali lye storage tank and alkali lye import.
Further, be provided with acid picking pump and spent acid groove, described acid picking pump is provided with the first import, the first outlet and the second outlet, and described first import exports with the spent acid of pickling tower and communicates, first outlet communicates with the concentrated sulfuric acid import of pickling tower, and the second outlet communicates with spent acid groove.
Further, be provided with alkali cleaning pump, described alkali cleaning pump is provided with the second import, the 3rd outlet and the 4th outlet, and described second import exports with the salkali waste of caustic wash tower and communicates, and described 3rd outlet communicates with the alkali lye import of caustic wash tower.
Further, be provided with the concentrated sulfuric acid and unload recessing and concentrated sulfuric acid unloading pump, the described concentrated sulfuric acid unloads recessing, concentrated sulfuric acid unloading pump and concentrated sulfuric acid storage tank and passes through pipeline communication successively.
Further, be provided with and join alkali groove and alkali lye draw-off pump, described in join alkali groove, alkali lye draw-off pump and alkali lye storage tank and pass through pipeline communication successively.
Further, the pipeline between described concentrated sulfuric acid storage tank and concentrated sulfuric acid import is provided with and mends sour pump.
Further, the pipeline between described alkali lye storage tank and alkali lye import is provided with benefit alkali pump.
Further, described pickling tower is packed tower, packing section is provided with in the middle part of described packed tower, described inlet exhaust gas is arranged at the below of packing section, described concentrated sulfuric acid import is arranged at the top of packing section, described spent acid outlet is arranged at the bottom of pickling tower, and described offgas outlet is arranged at the top of pickling tower.
Further, filter is provided with between described first outlet and the concentrated sulfuric acid import of pickling tower.
Further, described caustic wash tower is packed tower, packing section is provided with in the middle part of described packed tower, described gas feed is arranged at the below of packing section, described alkali lye import is arranged at the top of packing section, described salkali waste outlet is arranged at the bottom of pickling tower, and described gas vent is arranged at the top of pickling tower.
The beneficial effects of the utility model are: in pickling tower, adopt mass fraction higher than the hydrogen phosphide in the concentrated sulfuric acid absorption yellow phosphoric tail gas of 75%, generate phosphoric acid, sulfur dioxide and water, sulfur dioxide and a small amount of sulfuric acid enter in yellow phosphoric tail gas, and phosphoric acid and water enter in concentrated sulfuric acid solution.Again yellow phosphoric tail gas is passed into caustic wash tower, utilize alkaline solution as NaOH or sodium carbonate etc., sulfur dioxide absorption and sulfuric acid, obtain sodium sulphate and sodium sulfite solution.After tested, in the yellow phosphoric tail gas after overpickling tower acid is washed, Phosphine content is 0, achieves the object removing hydrogen phosphide completely.In waste sulfuric acid solution in pickling tower, containing phosphoric acid, can be used for producing phosphate fertilizer; Only containing sodium sulphate and sodium sulfite in spent caustic solution, can be used for producing saltcake, avoid three waste discharge and the problem to environment generation secondary pollution.
Accompanying drawing explanation
Fig. 1 is the flow chart that the utility model removes the device of hydrogen phosphide in yellow phosphoric tail gas;
1-pickling tower; 2-caustic wash tower; 3-concentrated sulfuric acid storage tank; 4-alkali lye storage tank; 5-acid picking pump; 6-spent acid groove; 7-filter; 8-alkali cleaning pump; 9-concentrated sulfuric acid unloads recessing; 10-concentrated sulfuric acid unloading pump; 11-inlet exhaust gas; The import of 12-concentrated sulfuric acid; 13-spent acid exports; 14-offgas outlet; 21-gas feed; 22-gas vent; The import of 23-alkali lye; 24-salkali waste exports; 51-the first import; 52-the first outlet; 53-the second outlet; 81-the second import; 82-the three outlet; 83-the four outlet; 110-join alkali groove; 120-alkali lye draw-off pump; 130-mend sour pump; 140-mend alkali pump.
Detailed description of the invention
Below in conjunction with drawings and Examples, the utility model is further illustrated.
As shown in Figure 1, the device removing hydrogen phosphide in yellow phosphoric tail gas of the present utility model, comprise concentrated sulfuric acid storage tank 3, pickling tower 1, caustic wash tower 2 and alkali lye storage tank 4, described pickling tower 1 is provided with inlet exhaust gas 11, concentrated sulfuric acid import 12, spent acid outlet 13 and offgas outlet 14, described caustic wash tower 2 is provided with gas feed 21, gas vent 22, alkali lye import 23 and salkali waste outlet 24, described concentrated sulfuric acid storage tank 3 passes through pipeline communication with concentrated sulfuric acid import 12, described offgas outlet 14 passes through pipeline communication with gas feed 21, described alkali lye storage tank 4 passes through pipeline communication with alkali lye import 23.
Concentrated sulfuric acid storage tank 3 is for storing the concentrated sulfuric acid, and in the concentrated sulfuric acid, the mass fraction of sulfuric acid is about 98%; Alkali lye storage tank 4 is for storing alkali lye, and alkali lye adopts the preparation of NaOH, sodium acid carbonate or sodium carbonate.During plant running, first the concentrated sulfuric acid is passed into pickling tower 1 from concentrated sulfuric acid storage tank 3 by concentrated sulfuric acid import 12, arrive setting liquid level, start cycle pickling pump 5, extract out from 13 outlets bottom pickling tower 1, send into from 12 imports of pickling tower 1, set up acid circulation.After acid circulation is set up, again yellow phosphoric tail gas is passed into pickling tower 1 from inlet exhaust gas 11, yellow phosphoric tail gas upwards flows, contact filling surface is reverse with the concentrated sulfuric acid sprayed downwards, hydrogen phosphide in yellow phosphoric tail gas is generated phosphoric acid, sulfur dioxide and water by concentrated sulfuric acid oxidation, and phosphoric acid and water enter in concentrated sulfuric acid solution.When device goes into operation, to 98% fresh sulfuric acid that pickling tower 1 is squeezed into, pass into after yellow phosphoric tail gas through sour circulation cleaning after a while, the concentration of recycle acid will reduce, when sulfuric acid concentration be reduced to close to 75% time, by cycle pickling pump 5 when proceeding circulation, to sending spent acid outside, spent acid is sent in spent acid storage tank; Restart simultaneously and mend sour pump 130, mend acid to pickling tower 1.Sulfur dioxide and a small amount of sulfuric acid enter in yellow phosphoric tail gas, discharge from offgas outlet 14.The yellow phosphoric tail gas containing sulfur dioxide and sulfuric acid of discharging from pickling tower 1 enters caustic wash tower 2 by gas feed 21.Giving before caustic wash tower 2 passes into yellow phosphoric tail gas, first need the alkali lye being just stored in alkali lye storage tank 4 to be passed in caustic wash tower 2, and start circulation alkali cleaning pump 8 and circulate, set up alkali lye balance.The yellow phosphoric tail gas entering caustic wash tower 2 upwards flows, contact filling surface is reverse with the circulation alkali liquor sprayed from top to bottom, sodium carbonate in sulfur dioxide in tail gas and sulfuric acid and alkali lye or NaOH react, generate sodium sulfite, sodium sulphate and water, thus remove whole sulfur dioxide and sulfuric acid.Yellow phosphoric tail gas after alkali cleaning is discharged from gas vent 22, by circulation alkali cleaning pump 8, the spent lye containing sodium sulfite and sodium sulphate is exported 24 from salkali waste and extracts out, all send into from 23 imports of caustic wash tower 2, cyclic absorption.When circulation alkali cleaning pump 8 export circulation fluid pH value be reduced to about 7 time, when continuing circulation, beat desulfurization waste liquor outward, the waste liquid amount sent is determined by regulating and controlling caustic wash tower 2 liquid level; Simultaneously mend alkali pump 120 from new startup, fill fresh alkali lye to caustic wash tower, the size of alkali lye magnitude of recruitment is determined according to yellow phosphoric tail gas feed rate height, sulfur dioxide wherein and sulfuric acid content size.
Through detecting, in the yellow phosphoric tail gas after overpickling tower 1 pickling, the content of hydrogen phosphide can be low to moderate zero, achieves and removes hydrogen phosphide completely.From the sulfuric acid solution that pickling tower 1 spent acid outlet 13 is discharged, only containing phosphoric acid impurity, can as the raw material producing phosphate fertilizer; From the spent caustic solution that caustic wash tower 2 salkali waste outlet 24 is discharged, major solute is sodium sulfite and sodium sulphate, can as the raw material producing saltcake, make full use of various intermediate products, avoid the wasting of resources, increase economic efficiency, and solve spent acid and take the problem subtracting solution-treated, discharge, avoid causing secondary pollution to environment.
In guarantee pickling tower 1, sulfuric acid concentration is higher than under the condition of 75%, in pickling tower 1, sulfuric acid spray flux is from top to down larger, the removal effect of hydrogen phosphide is better, the spent acid amount sent outside is fewer, the consumption of fresh sulfuric acid is lower, remove cost lower, for this reason, be provided with acid picking pump 5 and spent acid groove 6, described acid picking pump 5 is provided with the first import 51, first outlet 52 and the second outlet 53, described first import 51 exports 13 with the spent acid of pickling tower 1 and communicates, and the first outlet 52 communicates with the concentrated sulfuric acid import 12 of pickling tower 1, and the second outlet 53 communicates with spent acid groove 6.The sulfuric acid absorbing hydrogen phosphide in pickling tower 1 flows at the bottom of tower, extract out with cycle pickling pump 5, control the mass concentration of acid tower outlet sulfuric acid higher than 75%, the overwhelming majority returns from pickling tower 1 import 12 after pipeline mixing in fresh 98% sulfuric acid supplemented, cyclic absorption, seldom part is sent in waste acid pot 6; The inlet amount of fresh sulfuric acid carries out regulable control according to entering in pickling tower 2 yellow phosphoric tail gas uninterrupted with wherein Phosphine content height, and the spent acid uninterrupted that cycle pickling pump 5 is seen off is regulated and controled by adjustment of acidity tower 1 liquid level.
In like manner, in order to improve the effect of sulfur dioxide and free acid in yellow phosphoric tail gas, make full use of alkali lye, reduce alkaline consumption, and then reduction operating cost, be provided with alkali cleaning pump 8, described alkali cleaning pump 8 is provided with the second import 81, the 3rd outlet 82 and the 4th outlet 83, described second import 81 exports 24 with the salkali waste of caustic wash tower 2 and communicates, and described 3rd outlet 82 communicates with the alkali lye import 23 of caustic wash tower 2.Yellow phosphoric tail gas enters from 21 mouthfuls of caustic wash tower 2, upwards flows, with 23 imports from caustic wash tower 2.Enter and spray and under alkali lye in the reverse contact of filling surface, sulfur dioxide in yellow phosphoric tail gas and sulfuric acid are by alkali liquor absorption, generate sulfurous acid, sodium sulphate and water and enter in solution, flow into bottom caustic wash tower 2, extracted out from 24 outlets bottom caustic wash tower 2 by circulation alkali cleaning pump 8, the PH controlling alkali cleaning pump discharge solution is about 7, in neutral, major part is sent into tower from 23 imports of caustic wash tower 2 with the fresh alkali lye supplementing 10 from alkali lye after pipeline mixes, cyclic absorption, fraction is as desulfurization waste liquor carrying device.The inlet amount of fresh alkali lye carries out regulable control according to entering the height with wherein sulfur dioxide and free acid content of yellow phosphoric tail gas uninterrupted in caustic wash tower 2, and the desulfurization waste liquor uninterrupted that circulation alkali cleaning pump 8 is seen off is regulated and controled by adjustment caustic wash tower 2 liquid level.
Be provided with the concentrated sulfuric acid and unload recessing 9 and concentrated sulfuric acid unloading pump 10, the described concentrated sulfuric acid unloads recessing 9, concentrated sulfuric acid unloading pump 10 and concentrated sulfuric acid storage tank 3 and passes through pipeline communication successively.When the concentrated sulfuric acid is transported to factory building, is all stored in the concentrated sulfuric acid and unloads in recessing 9, when the concentrated sulfuric acid reserves in concentrated sulfuric acid storage tank 3 are not enough, utilize unloading pump 10 to unload recessing 9 from the concentrated sulfuric acid and extract the concentrated sulfuric acid, inject concentrated sulfuric acid storage tank 3, to meet user demand.In like manner, be provided with and join alkali groove 110 and alkali lye draw-off pump 120, described in join alkali groove 110, alkali lye draw-off pump 120 and alkali lye storage tank 4 and pass through pipeline communication successively.Join alkali groove 110 for configuring alkali lye, when the alkali lye reserves in alkali lye storage tank 4 are not enough, joining the alkali lye of configuration setting concentration in alkali groove 110, the alkali lye configured is pumped to alkali lye storage tank 4 by recycling alkali lye draw-off pump 120.The concentrated sulfuric acid is unloaded, Alkali liquid compounding and the absorption integrated enforcement of yellow phosphoric tail gas, forms overall technological process, decreases middle flow process, be conducive to increasing work efficiency, and saves implementation cost.
Pipeline between described concentrated sulfuric acid storage tank 3 and concentrated sulfuric acid import 12 is provided with and mends sour pump 130.Mend sour pump 130 for pumping the concentrated sulfuric acid of concentrated sulfuric acid storage tank 3 li to pickling tower 1.
Pipeline between described alkali lye storage tank 4 and alkali lye import 23 is provided with and mends alkali pump 140.
Pickling tower 1 can be general hollow container, as long as the concentrated sulfuric acid liquid level added is higher than the height of inlet exhaust gas 11.In order to increase the contact area of yellow phosphoric tail gas and concentrated sulfuric acid solution, concentrated sulfuric acid solution is made fully to absorb hydrogen phosphide in yellow phosphoric tail gas, described pickling tower 1 is packed tower, filler is provided with in the middle part of described packed tower, described inlet exhaust gas 11 is arranged at the below of packing section, described concentrated sulfuric acid import 12 is arranged at the top of packing section, and described spent acid outlet 13 is arranged at the bottom of pickling tower 1, and described offgas outlet 14 is arranged at the top of pickling tower 1.Yellow phosphoric tail gas passes into from pickling tower 1 bottom, and concentrated sulfuric acid solution passes into from the top of pickling tower 1, both reverse contacts, shock, mix uniform and complete more, meanwhile, filler, for increasing the contact area of yellow phosphoric tail gas and concentrated sulfuric acid solution, is conducive to guaranteeing that hydrogen phosphide is all absorbed.
Owing to also containing dust in yellow phosphoric tail gas, when yellow phosphoric tail gas passes into the concentrated sulfuric acid, dust is absorbed by the concentrated sulfuric acid, when utilizing acid picking pump 5 to make the concentrated sulfuric acid circulate, piling up in filler plate in order to avoid dust causes filler to block, and is provided with filter 7 between described first outlet 52 and the concentrated sulfuric acid import 12 of pickling tower 1.Filter 7, by the dust-filtering in the concentrated sulfuric acid that circulates, makes the concentrated sulfuric acid of inflow pickling tower 1 not containing dust impurities, ensures the effect absorbing hydrogen phosphide, and prevent each parts and pipeline blockage in pickling tower 1.
In like manner, described caustic wash tower 2 is packed tower, filler is provided with in the middle part of described packed tower, described gas feed 21 is arranged at the below of packing section, described alkali lye import 23 is arranged at the top of packing section, described salkali waste outlet 24 is arranged at the bottom of pickling tower 1, and described gas vent 22 is arranged at the top of pickling tower 1.
This device has the following advantages:
1) hydrogen phosphide removal efficiency is high, reaches 100%, and in raw material yellow phosphoric tail gas, Phosphine content is generally about 650 ~ 800ppm, and in the yellow phosphoric tail gas after purification, the detected value of hydrogen phosphide is zero;
2) sulfuric acid and sodium carbonate or NaOH wide material sources, low price, de-hydrogen phosphide cost is low;
3) only contain phosphoric acid in the Waste Sulfuric Acid that de-hydrogen phosphide produces, not containing other impurity, may be used for producing phosphate fertilizer; A contains sodium sulfate and sodium sulfite in the spent lye that de-free acid and sulfur dioxide produce, can produce saltcake product, three-waste free discharge and produce secondary pollution problem to environment;
4) pickling pipeline is provided with pot strainer, solves device blockage, achieve device long period, steady, safe operation;
5) device can adopt DCS or PLC system to regulate and control technological parameter, reduces operating personnel's quantity, reduces labour intensity.
Claims (10)
1. remove the device of hydrogen phosphide in yellow phosphoric tail gas, it is characterized in that: comprise concentrated sulfuric acid storage tank (3), pickling tower (1), caustic wash tower (2) and alkali lye storage tank (4), described pickling tower (1) is provided with inlet exhaust gas (11), concentrated sulfuric acid import (12), spent acid outlet (13) and offgas outlet (14), described caustic wash tower (2) is provided with gas feed (21), gas vent (22), alkali lye import (23) and salkali waste outlet (24), pipeline communication is passed through in described concentrated sulfuric acid storage tank (3) and concentrated sulfuric acid import (12), pipeline communication is passed through in described offgas outlet (14) and gas feed (21), pipeline communication is passed through in described alkali lye storage tank (4) and alkali lye import (23).
2. remove the device of hydrogen phosphide in yellow phosphoric tail gas as claimed in claim 1, it is characterized in that: be provided with acid picking pump (5) and spent acid groove (6), described acid picking pump (5) is provided with the first import (51), the first outlet (52) and the second outlet (53), described first import (51) exports (13) with the spent acid of pickling tower (1) and communicates, first outlet (52) communicates with the concentrated sulfuric acid import (12) of pickling tower (1), and the second outlet (53) communicates with spent acid groove (6).
3. remove the device of hydrogen phosphide in yellow phosphoric tail gas as claimed in claim 1 or 2, it is characterized in that: be provided with alkali cleaning pump (8), described alkali cleaning pump (8) is provided with the second import (81), the 3rd outlet (82) and the 4th outlet (83), described second import (81) exports (24) with the salkali waste of caustic wash tower (2) and communicates, and described 3rd outlet (82) communicates with the alkali lye import (23) of caustic wash tower (2).
4. remove the device of hydrogen phosphide in yellow phosphoric tail gas as claimed in claim 3, it is characterized in that: be provided with the concentrated sulfuric acid and unload recessing (9) and concentrated sulfuric acid unloading pump (10), the described concentrated sulfuric acid unloads recessing (9), concentrated sulfuric acid unloading pump (10) and concentrated sulfuric acid storage tank (3) and passes through pipeline communication successively.
5. remove the device of hydrogen phosphide in yellow phosphoric tail gas as claimed in claim 4, it is characterized in that: be provided with and join alkali groove (110) and alkali lye draw-off pump (120), described in join alkali groove (110), alkali lye draw-off pump (120) and alkali lye storage tank (4) and pass through pipeline communication successively.
6. remove the device of hydrogen phosphide in yellow phosphoric tail gas as claimed in claim 1, it is characterized in that: the pipeline between described concentrated sulfuric acid storage tank (3) and concentrated sulfuric acid import (12) is provided with and mends sour pump (130).
7. remove the device of hydrogen phosphide in yellow phosphoric tail gas as claimed in claim 6, it is characterized in that: the pipeline between described alkali lye storage tank (4) and alkali lye import (23) is provided with and mends alkali pump (140).
8. remove the device of hydrogen phosphide in yellow phosphoric tail gas as claimed in claim 2, it is characterized in that: described pickling tower (1) is packed tower, packing section is provided with in the middle part of described packed tower, described inlet exhaust gas (11) is arranged at the below of packing section, described concentrated sulfuric acid import (12) is arranged at the top of packing section, described spent acid outlet (13) is arranged at the bottom of pickling tower (1), and described offgas outlet (14) is arranged at the top of pickling tower (1).
9. remove the device of hydrogen phosphide in yellow phosphoric tail gas as claimed in claim 8, it is characterized in that: between described first outlet (52) and the concentrated sulfuric acid import (12) of pickling tower (1), be provided with filter (7).
10. remove the device of hydrogen phosphide in yellow phosphoric tail gas as claimed in claim 8 or 9, it is characterized in that: described caustic wash tower (2) is packed tower, packing section is provided with in the middle part of described packed tower, described gas feed (21) is arranged at the below of packing section, described alkali lye import (23) is arranged at the top of packing section, described salkali waste outlet (24) is arranged at the bottom of pickling tower (1), and described gas vent (22) is arranged at the top of pickling tower (1).
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| Application Number | Priority Date | Filing Date | Title |
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| CN201520646483.2U CN204911189U (en) | 2015-08-25 | 2015-08-25 | Device of hydrogen phosphate in desorption yellow phosphoric tail gas |
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| CN201520646483.2U CN204911189U (en) | 2015-08-25 | 2015-08-25 | Device of hydrogen phosphate in desorption yellow phosphoric tail gas |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105080312A (en) * | 2015-08-25 | 2015-11-25 | 成都德美工程技术有限公司 | Device and method for removing hydrogen phosphide in yellow phosphorous tail gas |
| CN107626195A (en) * | 2017-10-19 | 2018-01-26 | 云南江磷集团股份有限公司 | The tail gas treatment process of red phosphorus purification |
| CN112844006A (en) * | 2020-12-28 | 2021-05-28 | 马边长和电力有限责任公司 | Yellow phosphorus tail gas purification method |
-
2015
- 2015-08-25 CN CN201520646483.2U patent/CN204911189U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105080312A (en) * | 2015-08-25 | 2015-11-25 | 成都德美工程技术有限公司 | Device and method for removing hydrogen phosphide in yellow phosphorous tail gas |
| CN107626195A (en) * | 2017-10-19 | 2018-01-26 | 云南江磷集团股份有限公司 | The tail gas treatment process of red phosphorus purification |
| CN112844006A (en) * | 2020-12-28 | 2021-05-28 | 马边长和电力有限责任公司 | Yellow phosphorus tail gas purification method |
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