CN109603434A - A kind of purification process technique and device of yellow phosphoric tail gas - Google Patents
A kind of purification process technique and device of yellow phosphoric tail gas Download PDFInfo
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- CN109603434A CN109603434A CN201811518104.6A CN201811518104A CN109603434A CN 109603434 A CN109603434 A CN 109603434A CN 201811518104 A CN201811518104 A CN 201811518104A CN 109603434 A CN109603434 A CN 109603434A
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- B01D53/34—Chemical or biological purification of waste gases
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- B01D53/34—Chemical or biological purification of waste gases
- B01D53/74—General processes for purification of waste gases; Apparatus or devices specially adapted therefor
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Abstract
The invention discloses a kind of purification process technique of yellow phosphoric tail gas and device, described device includes water scrubber, lye prewashing tower, concentrated sulfuric acid scrubbing tower and lye fine purifiation tower.The present invention by by yellow phosphoric tail gas successively through washing, lye prewashing, the concentrated sulfuric acid wash with four step washing process of lye fine purifiation, so that the deep purifying of yellow phosphoric tail gas is realized, to meet the requirement of Chemical Manufacture；Furthermore, the present invention further utilizes washes and quick lime to configure lime white, carry out the regeneration of lye prewashing spent caustic liquid, and the waste residue that the calcium salt formed using alkali liquid regeneration is obtained through precipitating, filtration drying carries out Waste Sulfuric Acid neutralization, the final purification removing for realizing yellow phosphoric tail gas harmful constituent and the conversion that harmless form is realized to harmful constituent.
Description
Technical field
The invention belongs to chemical technology field, in particular to the purification process technique and device of a kind of yellow phosphoric tail gas.
Background technique
Yellow phosphorus is a kind of basic chemical industry raw material, widely used.Yellow phosphorus mainly uses electric furnace process to produce, one ton of Huang of every production
Phosphorus generates the yellow phosphoric tail gas of 2500~3000 mark sides.Yellow phosphoric tail gas contains 85%~95%(molar content) CO, can be used as carbon
The raw material of one chemical industry, especially oxonation.Since yellow phosphoric tail gas harmful constituent is complicated, content is high, and purified treatment difficulty is big, mesh
The effective rate of utilization of preceding yellow phosphoric tail gas is at a fairly low, and most of phosphorus production enterprises will be used as combustion after the simple purified treatment of yellow phosphoric tail gas
Material is vented using or by torch burning.It is utilized without the burning of effective purified treatment or burning is vented, not only waste of resource,
And a large amount of pollutant emission is formd, seriously affect environment.
Under current energy conservation and environmental protection, the overall background of Green Development, yellow phosphorus industry should not continue the old road of extensive development, country
Also the burning and exhausting after being impermissible for yellow phosphoric tail gas simple process.Existing purifying exhausting gas of yellow phosphorus passes through after mostly using washing, alkali cleaning greatly
The treatment process of temp.-changing adsorption (TSA) and pressure-variable adsorption (PSA)；Also have to pass through after using washing, alkali cleaning and appropriate air is added,
PH3, P4 are oxidized under heating condition to recycle the treatment process of activated carbon adsorption after P2O3 or P2O5.But existing yellow phosphoric tail gas
The clean-up effect of purification process is ideal not enough, it is difficult to meet the requirement of Chemical Manufacture, the innoxious of harmful constituent is also not implemented
Processing, when adsorbent reactivation, produce the discharge of harmful constituent.
Therefore, the new process for developing a kind of purifying exhausting gas of yellow phosphorus processing, converts yellow phosphoric tail gas to the chemical industry of high added value
Raw materials for production, and realize the harmless treatment of harmful constituent, it is the oneself requirement of yellow phosphorus industry development, and improve yellow phosphorus industry
The effective measures of economy.
Summary of the invention
It is an object of the invention to: in view of the above problems, providing one kind can be net to yellow phosphoric tail gas progress depth
Change, to meet the purification process technique and device of the yellow phosphoric tail gas of Chemical Manufacture requirement.
The technical scheme of the present invention is realized as follows: a kind of purification process technique of yellow phosphoric tail gas, it is characterised in that: packet
Include washing, lye prewashing, the concentrated sulfuric acid wash with four step washing process of lye fine purifiation, specifically:
A) raw material yellow phosphoric tail gas enters water scrubber, utilizes the mechanical admixture in the circulation washing water washing removing tail gas in water scrubber
And part highly acid gas, circulation washing water form washing water-flow circuit by washing water-circulating pump, wash the impurity of removing
It is discharged by tower reactor drain；
B) gas after washing is discharged by washing column overhead, and is sent to lye prewashing tower, utilizes the circulation in lye prewashing tower
Lye is washed, and circulation alkali liquor forms lye circulation loop by NaOH solution circulating pump, and the substance generated after washing passes through tower reactor
Drain discharge；
C) it is discharged through lye prewashing treated gas by lye prewashing column overhead, and is sent to concentrated sulfuric acid scrubbing tower, utilize dense sulphur
The circulation concentrated sulfuric acid in acid elution tower carries out oxidative absorption washing, and the circulation concentrated sulfuric acid forms the concentrated sulfuric acid by concentrated sulfuric acid circulating pump and follows
Loop back path, the Waste Sulfuric Acid after washing are discharged from tower reactor；
D) through concentrated sulfuric acid oxidative absorption treated gas by concentrated sulfuric acid washing column overhead discharge, and it is sent to the progress of lye fine purifiation tower
Fine purifiation, circulation alkali liquor form lye circulation loop by lye fine purifiation tower circulating pump, and the part lye in lye fine purifiation tower passes through
Lye fine purifiation tower circulation is pumped to lye prewashing tower as the circulation alkali liquor in lye prewashing tower, and the discharge of lye fine purifiation column overhead is net
Change treated gas.
The purification process technique of yellow phosphoric tail gas of the present invention, in the step c), the concentrated sulfuric acid scrubbing tower
Segmentation carries out concentrated sulfuric acid circulation, and the concentrated sulfuric acid scrubbing tower is divided into tower circulation section and lower tower circulation section, upper and lower tower circulation section point
The concentrated sulfuric acid circulating pump that configuration Tong Guo not corresponded to carries out stages cycle.
The purification process technique of yellow phosphoric tail gas of the present invention, the tower bottoms and quick lime of water scrubber discharge configure stone
Mortar, the regenerative agent as lye prewashing tower discharge tower bottoms, converts calcium salt for sodium salt, regenerates lye, after regeneration
Lye it is clarified, collect after be sent into lye prewashing tower reuse, alkali liquid regeneration formed calcium salt send waste residue filter after precipitation
It is separated by filtration, filtrate returns to lye system, and filter cake send waste residue blender as sulfur waste acid neutralizing agent, concentrated sulfuric acid scrubbing tower tower reactor row
Waste Sulfuric Acid out, which is sent, to be sprayed on the filter cake waste residue from waste residue filter to waste residue blender, after being converted into sulfuric acid calcium speciation
It sends out.
A kind of purifying processing device of yellow phosphoric tail gas, it is characterised in that: washed including water scrubber, lye prewashing tower, the concentrated sulfuric acid
Wash tower and lye fine purifiation tower；
The water scrubber is provided with washing water inlet, yellow phosphoric tail gas import and circulating water intake, the washing tower bottom drain
Mouthful with wash water-circulating pump and connect, the washing water-circulating pump is connect with the circulating water intake on water scrubber top to be formed washing water and follows
Loop back path, the water scrubber top vent are connect by pipeline with lye prewashing tower lower part；
The lye prewashing tower is provided with prewashing lye import and prewashing lye circulation port, the lye prewashing tower bottom leakage fluid dram
It is connect with NaOH solution circulating pump, the NaOH solution circulating pump connect to form pre- soda with the prewashing lye circulation port on lye prewashing tower top
Liquid circulation loop, the lye prewashing top of tower exhaust outlet are connect by pipeline with concentrated sulfuric acid scrubbing tower lower part；
The concentrated sulfuric acid scrubbing tower is provided with concentrated sulfuric acid import and concentrated sulfuric acid circulation port, the concentrated sulfuric acid wash tower bottoms leakage fluid dram
It is connect with concentrated sulfuric acid circulating pump, the concentrated sulfuric acid circulating pump connect to form the concentrated sulfuric acid with the concentrated sulfuric acid circulation port of concentrated sulfuric acid scrubbing tower
Circulation loop, the concentrated sulfuric acid scrubbing tower top vent are connect by pipeline with lye fine purifiation tower lower part；
The lye fine purifiation tower is provided with lye import and fine purifiation lye circulation port, the lye fine purifiation tower bottom leakage fluid dram and alkali
The connection of liquid fine purifiation tower circulating pump, the lye fine purifiation tower circulating pump connect shape with the fine purifiation lye circulation port on lye fine purifiation tower top
At fine purifiation lye circulation loop, lye in the lye fine purifiation tower is pre- by lye fine purifiation tower circulating pump and lye prewashing tower
Lye import connection is washed, the lye fine purifiation top of tower is gas exhaust port after purification.
The purifying processing device of yellow phosphoric tail gas of the present invention, the concentrated sulfuric acid scrubbing tower are divided into upper and lower tower circulation
Section, the bottom of the upper tower circulation section connect with upper tower concentrated sulfuric acid circulating pump, the upper tower concentrated sulfuric acid circulating pump respectively with upper tower
The concentrated sulfuric acid circulation port on circulation section top connects to form circulation loop with the concentrated sulfuric acid circulation port on lower tower circulation section top；Under described
The bottom of tower circulation section is connect with lower tower concentrated sulfuric acid circulating pump, and the lower tower concentrated sulfuric acid circulating pump is dense with lower tower circulation section top
Sulfuric acid circulation port connects to form circulation loop.
The purifying processing device of yellow phosphoric tail gas of the present invention, the washing tower bottom leakage fluid dram are followed by washing water
Ring pump is connect with lime white configured slot, and the lime white configured slot is connect with lime silo, and lime white configured slot top goes out liquid
Mouth is connect with lime white dashpot, and the lime white dashpot is connect by lime slurry pump at least one alkali liquid regeneration slot, institute
It states lye prewashing tower bottom to connect by NaOH solution circulating pump with alkali liquid regeneration slot, alkali liquid regeneration slot top liquid outlet and lye
Dashpot connection, the lye dashpot is connect by regenerating lye pump with the prewashing lye circulation port of lye prewashing tower, described
The bottom slag discharge of lime white configured slot and alkali liquid regeneration slot is connect with waste residue filter, the solids exit of the waste residue filter
Mouth is connect with waste residue blender, and filtrate (liquid is connect with lye dashpot, the inlet and the concentrated sulfuric acid of the waste residue blender
Wash tower bottoms leakage fluid dram is connected by concentrated sulfuric acid circulating pump, and the waste residue stirrer bottom is provided with waste discharge cinder notch.
The purifying processing device of yellow phosphoric tail gas of the present invention, the washing tower bottom leakage fluid dram are followed by washing water
Ring pump is connect with washing water dashpot, and the washing water dashpot is connect with lime white configured slot, in the washing water dashpot
Washes be added in lime white configured slot after metering, weighed quick lime passes through screw feeder in the lime silo
Machine is added in lime white configured slot.
The present invention through washing, lye prewashing, the concentrated sulfuric acid by successively washing and four step washers of lye fine purifiation yellow phosphoric tail gas
Skill, so that the deep purifying of yellow phosphoric tail gas is realized, to meet the requirement of Chemical Manufacture；In addition, the present invention further utilizes washing
Waste water and quick lime configure lime white, carry out the regeneration of lye prewashing spent caustic liquid, and pass through using the calcium salt that alkali liquid regeneration is formed
Precipitating, the obtained waste residue of filtration drying carry out Waste Sulfuric Acid neutralization, the final purification removing for realizing yellow phosphoric tail gas harmful constituent and right
Harmful constituent realizes the conversion of harmless form.
Detailed description of the invention
Fig. 1 is process flow diagram of the invention.
Marked in the figure: 1 is water scrubber, 2 be lye prewashing tower, and 3 be concentrated sulfuric acid scrubbing tower, and 4 be lye fine purifiation tower, and 5 be to wash
Water-circulating pump is washed, 6 be NaOH solution circulating pump, and 7a is upper tower concentrated sulfuric acid circulating pump, and 7b is lower tower concentrated sulfuric acid circulating pump, and 8 be lye essence
Tower circulating pump is washed, 9 be lime white configured slot, and 10 be lime silo, and 11 be lime white dashpot, and 12 be lime slurry pump, and 13 be lye
Regeneration tank, 14 be lye dashpot, and 15 be regeneration lye pump, and 16 be waste residue filter, and 17 be waste residue blender, and 18 be washing water
Dashpot, 19 be screw(-type) feeder.
Specific embodiment
With reference to the accompanying drawing, the present invention is described in detail.
In order to make the objectives, technical solutions, and advantages of the present invention clearer, with reference to the accompanying drawings and embodiments, right
The present invention is further elaborated.It should be appreciated that the specific embodiments described herein are merely illustrative of the present invention, and
It is not used in the restriction present invention.
As shown in Figure 1, a kind of purifying processing device of yellow phosphoric tail gas, including water scrubber 1, lye prewashing tower 2, the concentrated sulfuric acid are washed
Wash tower 3 and lye fine purifiation tower 4.
Wherein, the water scrubber 1 is provided with washing water inlet, yellow phosphoric tail gas import and circulating water intake, the washing
1 bottom leakage fluid dram of tower is connect with washing water-circulating pump 5, and the circulating water intake on the washing water-circulating pump 5 and 1 top of water scrubber connects
It connects to form washing water-flow circuit, 1 top vent of water scrubber is connect by pipeline with 2 lower part of lye prewashing tower.
The lye prewashing tower 2 is provided with prewashing lye import and prewashing lye circulation port, 2 bottom of lye prewashing tower
Leakage fluid dram is connect with NaOH solution circulating pump 6, and the NaOH solution circulating pump 6 is connect with the prewashing lye circulation port on 2 top of lye prewashing tower
Prewashing lye circulation loop is formed, 2 top vent of lye prewashing tower is connected by pipeline and 3 lower part of concentrated sulfuric acid scrubbing tower
It connects.
The concentrated sulfuric acid scrubbing tower 3 is provided with concentrated sulfuric acid import and concentrated sulfuric acid circulation port, 3 bottom of concentrated sulfuric acid scrubbing tower
Leakage fluid dram is connect with concentrated sulfuric acid circulating pump, and the concentrated sulfuric acid circulating pump connect shape with the concentrated sulfuric acid circulation port of concentrated sulfuric acid scrubbing tower 3
At concentrated sulfuric acid circulation loop, 3 top vent of concentrated sulfuric acid scrubbing tower is connect by pipeline with 4 lower part of lye fine purifiation tower.
The lye fine purifiation tower 4 is provided with lye import and fine purifiation lye circulation port, the 4 bottom drain of lye fine purifiation tower
Mouth is connect with lye fine purifiation tower circulating pump 8, and the lye fine purifiation tower circulating pump 8 and the fine purifiation lye on 4 top of lye fine purifiation tower follow
Collar extension connects to form fine purifiation lye circulation loop, and the lye in the lye fine purifiation tower 4 passes through lye fine purifiation tower circulating pump 8 and alkali
The prewashing lye import of liquid prewashing tower 2 connects, and is gas exhaust port after purification at the top of the lye fine purifiation tower 4.
In the present embodiment, the concentrated sulfuric acid scrubbing tower 3 divides for upper and lower tower circulation section, the bottom of the upper tower circulation section
It is connect with upper tower concentrated sulfuric acid circulating pump 7a, the concentrated sulfuric acid of the upper tower concentrated sulfuric acid circulating pump 7a respectively with upper tower circulation section top follows
Collar extension connects to form circulation loop with the concentrated sulfuric acid circulation port on lower tower circulation section top；The bottom of the lower tower circulation section and lower tower
The 7b connection of concentrated sulfuric acid circulating pump, the lower tower concentrated sulfuric acid circulating pump 7b connect shape with the concentrated sulfuric acid circulation port on lower tower circulation section top
At circulation loop.
In order to realize the solid forms conversion of harmful constituent in yellow phosphoric tail gas, the 1 bottom leakage fluid dram of water scrubber is by washing
It washs water-circulating pump 5 to connect with washing water dashpot 18, the washing water dashpot 18 is connect with lime white configured slot 9, the stone
Mortar configured slot 9 is connect with lime silo 10, and the washes in the washing water dashpot 18 is added to lime white after metering
In configured slot 9, weighed quick lime is added in lime white configured slot 9 by screw(-type) feeder 19 in the lime silo 10,
The 9 top liquid outlet of lime white configured slot is connect with lime white dashpot 11, and the lime white dashpot 11 passes through lime white
Pump 12 is connect at least one alkali liquid regeneration slot 13, and 2 bottom of lye prewashing tower passes through NaOH solution circulating pump 6 and alkali liquid regeneration slot
13 connections, the 13 top liquid outlet of alkali liquid regeneration slot are connect with lye dashpot 14, and the lye dashpot 14 passes through regeneration
Lye pump 15 is connect with the prewashing lye circulation port of lye prewashing tower 2, the bottom of the lime white configured slot 9 and alkali liquid regeneration slot 13
Portion's slag-drip opening is connect with waste residue filter 16, and the solid outlet of the waste residue filter 16 is connect with waste residue blender 17,
Filtrate (liquid is connect with lye dashpot 14, the inlet and 3 bottom leakage fluid dram of concentrated sulfuric acid scrubbing tower of the waste residue blender 17
Connection, 17 bottom of waste residue blender is provided with waste discharge cinder notch.
As shown in Figure 1, a kind of purification process technique of yellow phosphoric tail gas, including washing, lye prewashing, the concentrated sulfuric acid is washed and lye
Four step washing process of fine purifiation, specifically:
A) raw material yellow phosphoric tail gas enters water scrubber 1, miscellaneous using the machinery in the circulation washing water washing removing tail gas in water scrubber 1
Matter and part highly acid gas, such as HF, circulation washing water form washing water-flow circuit, washing by washing water-circulating pump 5
The impurity of removing is discharged by tower reactor drain, and tower top supplements the water balance that a small amount of fresh water realizes water scrubber 1.
B) gas after washing is discharged by 1 tower top of water scrubber, and is sent to lye prewashing tower 2, using in lye prewashing tower 2
Circulation alkali liquor (NaOH) washed, remove wherein most HF, SiF4、H2S、CO2、AsH3And small part PH3、P4, alkali
The acidic materials of liquid washing absorption are reacted with NaOH generates sodium salt, and circulation alkali liquor forms lye by NaOH solution circulating pump 6 and is recycled back to
Road, the substance generated after washing are discharged by tower reactor drain, and tower top supplements a small amount of lye (coming from lye fine purifiation tower) and realizes lye
The lye of prewashing tower 2 balances.
C) it is discharged through lye prewashing treated gas by 2 tower top of lye prewashing tower, and is sent to concentrated sulfuric acid scrubbing tower 3, benefit
It is washed with the circulation concentrated sulfuric acid in concentrated sulfuric acid scrubbing tower 3, remaining H2S、P4、PH3Etc. foreign gases by the concentrated sulfuric acid aoxidize simultaneously
It absorbs, the segmentation of concentrated sulfuric acid scrubbing tower 3 carries out concentrated sulfuric acid circulation, and the concentrated sulfuric acid scrubbing tower 3 divides for upper tower circulation section under
Tower circulation section, the concentrated sulfuric acid circulating pump that upper and lower tower circulation section passes through corresponding configuration respectively carry out stages cycle, to improve washing effect
Fruit and reduction concentrated sulfuric acid consumption, the fresh concentrated sulfuric acid are added from tower top, and the Waste Sulfuric Acid after washing is discharged from tower reactor.The present invention utilizes
The strong oxidizing property of the concentrated sulfuric acid is by P remaining in yellow phosphoric tail gas4、PH3It is directly carried out at oxidation by the substance that alkali liquid washing absorbs Deng difficult
Reason and absorption.
D) it is discharged through concentrated sulfuric acid oxidative absorption treated gas by 3 tower top of concentrated sulfuric acid scrubbing tower, and is sent to lye fine purifiation
Tower 4 carries out fine purifiation, removes the oxide of remaining P, S formed in concentrated sulfuric acid scrubbing tower 3 on a small quantity in gas, and circulation alkali liquor is logical
It crosses lye fine purifiation tower circulating pump 8 and forms lye circulation loop, the part lye in lye fine purifiation tower 4 is recycled by lye fine purifiation tower
Pump 8 is sent to lye prewashing tower 2 as the circulation alkali liquor in lye prewashing tower 2, after purified treatment is discharged in 4 tower top of lye fine purifiation tower
Gas makes gas realize deep purifying, meets the requirement used as industrial chemicals.
Furthermore it is possible to be arranged according to the absorption exothermic dissolution situation of yellow phosphoric tail gas component feature and Ge Ta for each scrubbing tower
Cleaning solution recirculation cooler realizes that each scrubbing tower operation temperature is no more than 80 DEG C to remove the heat of solution of washing process generation.
Wherein, the tower bottoms and quick lime that water scrubber 1 is discharged configure lime white, are used as lye prewashing tower 2 and tower bottoms is discharged
Regenerative agent, convert calcium salt for sodium salt, regenerate lye, the lye after regeneration is clarified, collect after to be sent into lye pre-
2 reuse of tower is washed, configures lime white using the waste water and quick lime of water scrubber 1, as the regenerative agent of spent lye, alkali liquid regeneration is
The sodium salt and lime white (Ca (OH) that harmful constituent in yellow phosphoric tail gas and NaOH are formed2) calcium salt is generated, it realizes in yellow phosphoric tail gas
The solid forms of harmful constituent convert, while reducing the consumption of fresh lye, and realize that washes recycles, and reduce useless
Water discharge.
And the calcium salt that alkali liquid regeneration is formed send waste residue filter 16 to be separated by filtration after precipitation, and filtrate returns to lye system
System, filter cake send waste residue blender 17 to be used as sulfur waste acid neutralizing agent, and the Waste Sulfuric Acid of 3 tower reactor of concentrated sulfuric acid scrubbing tower discharge, which is sent to waste residue, to be stirred
Device 17 is mixed, is sprayed on the filter cake waste residue from waste residue filter 16, is sent out after being converted into sulfuric acid calcium speciation, is filtered dry using crossing
Alkali liquid regeneration calcium precipitation after dry carries out Waste Sulfuric Acid neutralization, while realizing the unstable calcium salt oxidation for forming alkali liquid regeneration
Processing is finally reached to stablize calcium salt by the harmless form solidification of noxious material in yellow phosphoric tail gas.
In the present embodiment, the tower bottoms that water scrubber 1 is discharged is buffered in washing water dashpot 18, the metered stone of batch
In mortar configured slot 9, from lime silo 10 and weighed quick lime is slowly added to lime white configure through screw(-type) feeder 19
Lime white is configured in slot 9, configured lime slurry send the stored for future use into lime white dashpot 11.
The spent lye that lye prewashing tower 2 is discharged is sent to alkali liquid regeneration slot 13, using lime slurry pump 12 by lime white dashpot
Lime white in 11 presses metered alkali liquid regeneration slot 13, in alkali liquid regeneration slot 13, lime white (Ca (OH)2) with spent lye in
Sodium salt react, generate calcium salt and NaOH, realize alkali liquid regeneration.It, can be on demand to alkali liquid regeneration slot after the completion of regenerative response
Flocculant is added in 13, to realize the more preferable precipitating of calcium salt.Supernatant after staticly settling is discharged into lye dashpot 14, passes through
Regeneration lye pump 15 sends lye prewashing system back to and realizes reuse.Wherein, alkali liquid regeneration slot 13 is arranged two, meets between alkali liquid regeneration
The requirement of gap batch operation and lye prewashing tower continuous draining.Alkali liquid regeneration slot 13 is drained into 9 bottom precipitation of lime white configured slot
Waste residue filter 16 is filtered drying, and filtrate is sent to lye dashpot 14, and filter cake is sent to waste residue blender 17.
The Waste Sulfuric Acid being discharged from concentrated sulfuric acid scrubbing tower tower reactor send the waste residue being uniformly sprayed in stirring to waste residue blender 17
On, realize the oxidation-stabilized processing of the neutralization of Waste Sulfuric Acid Yu the unstable calcium salt of waste residue.
The foregoing is merely illustrative of the preferred embodiments of the present invention, is not intended to limit the invention, all in essence of the invention
Made any modifications, equivalent replacements, and improvements etc., should all be included in the protection scope of the present invention within mind and principle.
Claims (7)
1. a kind of purification process technique of yellow phosphoric tail gas, it is characterised in that: including washing, lye prewashing, the concentrated sulfuric acid is washed and lye
Four step washing process of fine purifiation, specifically:
A) raw material yellow phosphoric tail gas enters water scrubber, utilizes the mechanical admixture in the circulation washing water washing removing tail gas in water scrubber
And part highly acid gas, circulation washing water form washing water-flow circuit by washing water-circulating pump, wash the impurity of removing
It is discharged by tower reactor drain；
B) gas after washing is discharged by washing column overhead, and is sent to lye prewashing tower, utilizes the circulation in lye prewashing tower
Lye is washed, and circulation alkali liquor forms lye circulation loop by NaOH solution circulating pump, and the substance generated after washing passes through tower reactor
Drain discharge；
C) it is discharged through lye prewashing treated gas by lye prewashing column overhead, and is sent to concentrated sulfuric acid scrubbing tower, utilize dense sulphur
The circulation concentrated sulfuric acid in acid elution tower carries out oxidative absorption washing, and the circulation concentrated sulfuric acid forms the concentrated sulfuric acid by concentrated sulfuric acid circulating pump and follows
Loop back path, the Waste Sulfuric Acid after washing are discharged from tower reactor；
D) through concentrated sulfuric acid oxidative absorption treated gas by concentrated sulfuric acid washing column overhead discharge, and it is sent to the progress of lye fine purifiation tower
Fine purifiation, circulation alkali liquor form lye circulation loop by lye fine purifiation tower circulating pump, and the part lye in lye fine purifiation tower passes through
Lye fine purifiation tower circulation is pumped to lye prewashing tower as the circulation alkali liquor in lye prewashing tower, and the discharge of lye fine purifiation column overhead is net
Change treated gas.
2. the purification process technique of yellow phosphoric tail gas according to claim 1, it is characterised in that: in the step c), institute
It states the segmentation of concentrated sulfuric acid scrubbing tower and carries out concentrated sulfuric acid circulation, the concentrated sulfuric acid scrubbing tower is divided into tower circulation section and lower tower circulation section,
The concentrated sulfuric acid circulating pump that upper and lower tower circulation section passes through corresponding configuration respectively carries out stages cycle.
3. the purification process technique of yellow phosphoric tail gas according to claim 1, it is characterised in that: the tower bottoms of water scrubber discharge
Lime white is configured with quick lime, the regenerative agent as lye prewashing tower discharge tower bottoms converts calcium salt for sodium salt, obtains lye
To regeneration, lye after regeneration is clarified, collect after be sent into lye prewashing tower reuse, the calcium salt that alkali liquid regeneration is formed is after precipitation
Waste residue filter is sent to be separated by filtration, filtrate returns to lye system, and filter cake send waste residue blender as sulfur waste acid neutralizing agent, the concentrated sulfuric acid
The Waste Sulfuric Acid of scrubbing tower tower reactor discharge, which is sent, to be sprayed on the filter cake waste residue from waste residue filter to waste residue blender, is converted into
It is sent out after sulfuric acid calcium speciation.
4. a kind of purifying processing device of yellow phosphoric tail gas, it is characterised in that: including water scrubber (1), lye prewashing tower (2), dense sulphur
Acid elution tower (3) and lye fine purifiation tower (4)；
The water scrubber (1) is provided with washing water inlet, yellow phosphoric tail gas import and circulating water intake, water scrubber (1) bottom
Portion's leakage fluid dram is connect with washing water-circulating pump (5), the circulating water intake of washing water-circulating pump (5) and water scrubber (1) top
Connection forms washing water-flow circuit, and water scrubber (1) top vent is connected by pipeline and lye prewashing tower (2) lower part
It connects；
The lye prewashing tower (2) is provided with prewashing lye import and prewashing lye circulation port, lye prewashing tower (2) bottom
Leakage fluid dram is connect with NaOH solution circulating pump (6), and the prewashing lye on the NaOH solution circulating pump (6) and lye prewashing tower (2) top recycles
Mouth connection forms prewashing lye circulation loop, and lye prewashing tower (2) top vent passes through pipeline and concentrated sulfuric acid scrubbing tower
(3) lower part connects；
The concentrated sulfuric acid scrubbing tower (3) is provided with concentrated sulfuric acid import and concentrated sulfuric acid circulation port, concentrated sulfuric acid scrubbing tower (3) bottom
Leakage fluid dram is connect with concentrated sulfuric acid circulating pump, and the concentrated sulfuric acid circulating pump is connect with the concentrated sulfuric acid circulation port of concentrated sulfuric acid scrubbing tower (3)
Concentrated sulfuric acid circulation loop is formed, concentrated sulfuric acid scrubbing tower (3) top vent is connected by pipeline and lye fine purifiation tower (4) lower part
It connects；
The lye fine purifiation tower (4) is provided with lye import and fine purifiation lye circulation port, lye fine purifiation tower (4) the bottom drain
Mouth is connect with lye fine purifiation tower circulating pump (8), the fine purifiation of the lye fine purifiation tower circulating pump (8) and lye fine purifiation tower (4) top
Lye circulation port connects to form fine purifiation lye circulation loop, and the lye in the lye fine purifiation tower (4) is followed by lye fine purifiation tower
Ring pump (8) is connect with the prewashing lye import of lye prewashing tower (2), is arranged at the top of the lye fine purifiation tower (4) for gas after purification
Port.
5. the purifying processing device of yellow phosphoric tail gas according to claim 4, it is characterised in that: the concentrated sulfuric acid scrubbing tower
(3) it is divided into upper and lower tower circulation section, the bottom of the upper tower circulation section is connect with upper tower concentrated sulfuric acid circulating pump (7a), the upper tower
The concentrated sulfuric acid of the concentrated sulfuric acid circulating pump (7a) respectively with the concentrated sulfuric acid circulation port on upper tower circulation section top and lower tower circulation section top follows
Collar extension connects to form circulation loop；The bottom of the lower tower circulation section is connect with lower tower concentrated sulfuric acid circulating pump (7b), the lower tower
Concentrated sulfuric acid circulating pump (7b) connect to form circulation loop with the concentrated sulfuric acid circulation port on lower tower circulation section top.
6. the purifying processing device of yellow phosphoric tail gas according to claim 5, it is characterised in that: water scrubber (1) bottom
Leakage fluid dram is connect by washing water-circulating pump (5) with lime white configured slot (9), the lime white configured slot (9) and lime silo
(10) it connects, lime white configured slot (9) the top liquid outlet is connect with lime white dashpot (11), the lime white dashpot
(11) it is connect by lime slurry pump (12) at least one alkali liquid regeneration slot (13), lye prewashing tower (2) bottom passes through alkali
Liquid circulating pump (6) is connect with alkali liquid regeneration slot (13), alkali liquid regeneration slot (13) the top liquid outlet and lye dashpot (14)
Connection, the lye dashpot (14) are connect by regenerating lye pump (15) with the prewashing lye circulation port of lye prewashing tower (2),
The bottom slag discharge of the lime white configured slot (9) and alkali liquid regeneration slot (13) is connect with waste residue filter (16), the waste residue
The solid outlet of filter (16) is connect with waste residue blender (17), and filtrate (liquid is connect with lye dashpot (14), institute
The inlet for stating waste residue blender (17) is connect with concentrated sulfuric acid scrubbing tower (3) bottom leakage fluid dram by concentrated sulfuric acid circulating pump (7b),
Waste residue blender (17) bottom is provided with waste discharge cinder notch.
7. the purifying processing device of yellow phosphoric tail gas according to claim 6, it is characterised in that: water scrubber (1) bottom
Leakage fluid dram is connect by washing water-circulating pump (5) with washing water dashpot (18), the washing water dashpot (18) and lime white
Configured slot (9) connects, and the washes in the washing water dashpot (18) is added to lime white configured slot (9) after metering
Interior, weighed quick lime is added in lime white configured slot (9) by screw(-type) feeder (19) in the lime silo (10).
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| CN201811518104.6A CN109603434B (en) | 2018-12-12 | 2018-12-12 | Yellow phosphorus tail gas purification treatment process and device |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114588734A (en) * | 2022-01-28 | 2022-06-07 | 杨光华 | Method for purifying yellow phosphorus tail gas of electric furnace |
| CN114956506A (en) * | 2021-12-30 | 2022-08-30 | 昆明理工大学 | Dewatering device for hot drying red phosphorus containing CO industrial tail gas |
| CN116874201A (en) * | 2023-09-06 | 2023-10-13 | 山东万达环保科技有限公司 | Method for calcining lime by taking yellow phosphorus tail gas as fuel |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101024140A (en) * | 2007-01-15 | 2007-08-29 | 左建国 | Method for purifying phosphor tail-gas |
| CN102019141A (en) * | 2010-12-20 | 2011-04-20 | 昆明理工大学 | Process for purifying tail gas containing hydrothion by using liquid phase catalytic oxidation method |
| CN103768907A (en) * | 2012-10-26 | 2014-05-07 | 中国石油化工股份有限公司 | Deep purification method for oxidizing and alkali-washing yellow phosphorus tail gas |
| CN105132040A (en) * | 2015-08-24 | 2015-12-09 | 西安新环能源有限公司 | Yellow phosphorus tail gas purification method and system |
-
2018
- 2018-12-12 CN CN201811518104.6A patent/CN109603434B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101024140A (en) * | 2007-01-15 | 2007-08-29 | 左建国 | Method for purifying phosphor tail-gas |
| CN102019141A (en) * | 2010-12-20 | 2011-04-20 | 昆明理工大学 | Process for purifying tail gas containing hydrothion by using liquid phase catalytic oxidation method |
| CN103768907A (en) * | 2012-10-26 | 2014-05-07 | 中国石油化工股份有限公司 | Deep purification method for oxidizing and alkali-washing yellow phosphorus tail gas |
| CN105132040A (en) * | 2015-08-24 | 2015-12-09 | 西安新环能源有限公司 | Yellow phosphorus tail gas purification method and system |
Non-Patent Citations (1)
| Title |
|---|
| 王学谦等: "《黄磷尾气催化氧化净化技术》", 28 February 2009 * |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114956506A (en) * | 2021-12-30 | 2022-08-30 | 昆明理工大学 | Dewatering device for hot drying red phosphorus containing CO industrial tail gas |
| CN114588734A (en) * | 2022-01-28 | 2022-06-07 | 杨光华 | Method for purifying yellow phosphorus tail gas of electric furnace |
| CN114588734B (en) * | 2022-01-28 | 2023-09-29 | 杨光华 | Method for purifying yellow phosphorus tail gas of electric furnace |
| CN116874201A (en) * | 2023-09-06 | 2023-10-13 | 山东万达环保科技有限公司 | Method for calcining lime by taking yellow phosphorus tail gas as fuel |
| CN116874201B (en) * | 2023-09-06 | 2023-12-05 | 山东万达环保科技有限公司 | Method for calcining lime by taking yellow phosphorus tail gas as fuel |
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| CN109603434B (en) | 2021-08-20 |
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