CN109758874A - A kind of environment-protective process purifying potassium sulfate production tail gas - Google Patents
A kind of environment-protective process purifying potassium sulfate production tail gas Download PDFInfo
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- CN109758874A CN109758874A CN201910181822.7A CN201910181822A CN109758874A CN 109758874 A CN109758874 A CN 109758874A CN 201910181822 A CN201910181822 A CN 201910181822A CN 109758874 A CN109758874 A CN 109758874A
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- tower
- hydrochloric acid
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- 238000000034 method Methods 0.000 title claims abstract description 68
- 230000008569 process Effects 0.000 title claims abstract description 62
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 46
- OTYBMLCTZGSZBG-UHFFFAOYSA-L potassium sulfate Chemical compound [K+].[K+].[O-]S([O-])(=O)=O OTYBMLCTZGSZBG-UHFFFAOYSA-L 0.000 title claims abstract description 34
- 229910052939 potassium sulfate Inorganic materials 0.000 title claims abstract description 34
- 235000011151 potassium sulphates Nutrition 0.000 title claims abstract description 34
- VEXZGXHMUGYJMC-UHFFFAOYSA-N Hydrochloric acid Chemical compound Cl VEXZGXHMUGYJMC-UHFFFAOYSA-N 0.000 claims abstract description 291
- 239000007789 gas Substances 0.000 claims abstract description 173
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 172
- 239000007788 liquid Substances 0.000 claims abstract description 160
- 238000005201 scrubbing Methods 0.000 claims abstract description 139
- 238000010521 absorption reaction Methods 0.000 claims abstract description 131
- 238000001816 cooling Methods 0.000 claims abstract description 60
- 239000000498 cooling water Substances 0.000 claims abstract description 44
- IXCSERBJSXMMFS-UHFFFAOYSA-N hydrogen chloride Substances Cl.Cl IXCSERBJSXMMFS-UHFFFAOYSA-N 0.000 claims abstract description 43
- 229910000041 hydrogen chloride Inorganic materials 0.000 claims abstract description 43
- 239000002253 acid Substances 0.000 claims abstract description 39
- 239000002250 absorbent Substances 0.000 claims abstract description 29
- 230000002745 absorbent Effects 0.000 claims abstract description 29
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims abstract description 22
- 229910002804 graphite Inorganic materials 0.000 claims abstract description 22
- 239000010439 graphite Substances 0.000 claims abstract description 22
- 230000008676 import Effects 0.000 claims description 122
- 238000005406 washing Methods 0.000 claims description 72
- 238000003860 storage Methods 0.000 claims description 40
- 239000011552 falling film Substances 0.000 claims description 35
- QAOWNCQODCNURD-UHFFFAOYSA-N Sulfuric acid Chemical compound OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 claims description 33
- 239000010408 film Substances 0.000 claims description 29
- 239000001117 sulphuric acid Substances 0.000 claims description 22
- 235000011149 sulphuric acid Nutrition 0.000 claims description 22
- 238000000746 purification Methods 0.000 claims description 21
- 238000011084 recovery Methods 0.000 claims description 18
- 239000011265 semifinished product Substances 0.000 claims description 18
- 239000007792 gaseous phase Substances 0.000 claims description 16
- 239000002826 coolant Substances 0.000 claims description 12
- 239000000110 cooling liquid Substances 0.000 claims description 10
- 238000000605 extraction Methods 0.000 claims description 10
- 239000007791 liquid phase Substances 0.000 claims description 10
- 238000000926 separation method Methods 0.000 claims description 9
- 125000004122 cyclic group Chemical group 0.000 claims description 8
- 239000000047 product Substances 0.000 claims description 6
- 150000003839 salts Chemical class 0.000 claims description 4
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 claims description 3
- 229910052739 hydrogen Inorganic materials 0.000 claims description 3
- 239000001257 hydrogen Substances 0.000 claims description 3
- 230000003647 oxidation Effects 0.000 claims description 3
- 238000007254 oxidation reaction Methods 0.000 claims description 3
- 239000008213 purified water Substances 0.000 claims description 3
- 239000004575 stone Substances 0.000 claims description 3
- 230000001360 synchronised effect Effects 0.000 claims description 3
- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical compound [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 claims description 2
- 239000005864 Sulphur Substances 0.000 claims 1
- 230000007613 environmental effect Effects 0.000 abstract description 2
- 230000006872 improvement Effects 0.000 abstract description 2
- 230000009102 absorption Effects 0.000 description 87
- 238000010586 diagram Methods 0.000 description 7
- 239000006227 byproduct Substances 0.000 description 2
- 238000007599 discharging Methods 0.000 description 2
- 238000010926 purge Methods 0.000 description 2
- 230000004044 response Effects 0.000 description 2
- ZLMJMSJWJFRBEC-UHFFFAOYSA-N Potassium Chemical compound [K] ZLMJMSJWJFRBEC-UHFFFAOYSA-N 0.000 description 1
- 230000008901 benefit Effects 0.000 description 1
- 239000003337 fertilizer Substances 0.000 description 1
- 230000013011 mating Effects 0.000 description 1
- 239000011591 potassium Substances 0.000 description 1
- 229910052700 potassium Inorganic materials 0.000 description 1
- 239000001120 potassium sulphate Substances 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 229910052717 sulfur Inorganic materials 0.000 description 1
- 239000011593 sulfur Substances 0.000 description 1
Abstract
A kind of environment-protective process purifying potassium sulfate production tail gas proposed by the present invention, vent gas treatment is carried out by tail gas treatment device, tail gas treatment device includes exhaust pipe road, graphite cooler, primary scrubbing tower group, secondary wash tower group, primary absorbent tower group, secondary absorption tower group, gas-liquid separator, relieving haperacidity bucket, hydrochloric acid medial launder and water circulating cooling component, the process flow of environment-protective process includes that tail gas is cooling, the production of B acid, the production of A acid, dilute hydrochloric acid production and cooling water circulation, the present invention existing vent gas treatment there are aiming at the problem that, carry out exploitation improvement, more specification hydrochloric acid can be produced, hydrochloric acid obtains extracting rate height, grade is high, it is high-quality, it is in demand, the hydrogen chloride tail gas handled through the invention, absorptivity is high, meet emission request, process water and recirculated water combine, enterprise water use is saved, meet enterprise's low cost, it is high The production requirement of efficiency also complies with the environmental requirement of energy-saving and emission-reduction.
Description
Technical field
The present invention relates to production Technique of Potassium Sulphate field, especially a kind of environment-protective process for purifying potassium sulfate production tail gas.
Background technique
Potassium sulfate, refer to-kind of important sulfur-bearing, potassium element chlorideless potassic fertilizer, can be used in multiple fields, the market demand
Extensively.
Now the production method of potassium sulfate during producing potassium sulfate, can be generated a large amount of using Mannheim proeess
Hydrogen chloride tail gas, can be used as the raw materials for production of by-product hydrochloric acid.Existing potassium sulfate production enterprise, mating processing equipment compared with
Difference only provides the preliminary cooling of hydrogen chloride tail gas and washs, and hydrochloric acid poor quality obtained, market are poor, moreover, vent gas treatment is endless
It is whole, emission request is not met, need to additionally be purified, not only increases processing cost, and by-product profit is low.
Summary of the invention
The present invention is in view of the above-mentioned problems, propose a kind of environment-protective process for purifying potassium sulfate production tail gas.
Specific technical solution is as follows:
A kind of environment-protective process purifying potassium sulfate production tail gas, which is characterized in that the environment-protective process is set by vent gas treatment
It is standby to carry out vent gas treatment, and the process flow of environment-protective process include cooling tail gas, the production of B acid, the production of A acid, dilute hydrochloric acid production and
Cooling water circulation.
The environment-protective process of above-mentioned a kind of purification potassium sulfate production tail gas, wherein the tail gas treatment device includes tail gas
Conveyance conduit, graphite cooler, primary scrubbing tower group, secondary wash tower group, primary absorbent tower group, secondary absorption tower group, gas-liquid
Separator, relieving haperacidity bucket, hydrochloric acid medial launder and water circulating cooling component, the primary scrubbing tower group is by 2 sulphuric acid gas washers
In series, the secondary wash tower group is in series by 4 sulphuric acid gas washers, and the primary absorbent tower group is by 3 groups of falling liquid films
Absorption tower group is constituted, and the secondary absorption tower group is made of 2 groups of film-falling absorption tower groups, and the hydrochloric acid medial launder includes A grade hydrochloric acid
Medial launder and B grade hydrochloric acid medial launder, the water circulating cooling component include return water bucket, cyclic water tank, hot water pump group, cooling tower,
Cold water pump group, cooling water storage tank and water distributor；
The exhaust pipe road is connected to Mannheim reacting furnace, and receives the tail gas of Mannheim reacting furnace discharge, the stone
Black cooler includes inlet exhaust gas a1, cooling liquid inlet a2, steam (vapor) outlet a3 and coolant outlet a4, the inlet exhaust gas a1 with
The connection of exhaust pipe road, receives tail gas, and cooling liquid inlet a2 is connected to water distributor, and steam (vapor) outlet a3 is connected to return water bucket,
Coolant outlet a4 is connected to primary scrubbing tower group；
The sulphuric acid gas washer includes washing import b1, acid solution inlet and outlet b2, washs outlet b3 and circulation line b4, just
Sulphuric acid gas washer in grade scrubbing tower group is divided by front-rear position, respectively B1 scrubbing tower and B2 scrubbing tower, and No. B1 is washed
The washing import b1 for washing tower is connected to the coolant outlet a4 of graphite cooler, and the acid solution inlet and outlet b2 of B1 scrubbing tower is washed with No. B2
The acid solution inlet and outlet b2 for washing tower is interconnected, and the washing outlet b3 of B1 scrubbing tower and the washing import b1 of B2 scrubbing tower connect
Logical, the both ends of circulation line b4 are respectively communicated with the top and tail portion of sulphuric acid gas washer, and are equipped with hydrochloric acid and pump, B1 scrubbing tower
It is connected with cooling line again on circulation line b4, B grade hydrochloric acid conveyance conduit, institute are connected on the circulation line b4 of B2 scrubbing tower
Cooling line connection graphite cooler is stated again, the B grade hydrochloric acid conveyance conduit is connected to B grade hydrochloric acid medial launder；
3 groups of film-falling absorption tower groups for constituting the primary absorbent tower group are successively in parallel, constitute the 2 of the secondary absorption tower group
Group film-falling absorption tower group is successively in parallel, and the film-falling absorption tower group is by 1 stage falling-film absorption tower and 1 second level film-falling absorption tower
It is in series；
In primary absorbent tower group, the stage falling-film absorption tower includes falling liquid film import c1, absorbing liquid import c2, absorbing liquid
Export c3, offgas outlet c4 and circulation import c5, the second level film-falling absorption tower include falling liquid film import d1, absorbing liquid import d2,
Absorbing liquid exports d3 and offgas outlet d4, and the falling liquid film import c1 on stage falling-film absorption tower passes through the washing of pipeline and B2 scrubbing tower
B3 connection is exported, absorbing liquid import c2 is connected to water distributor, and absorbing liquid outlet c3 is connected to A grade hydrochloric acid medial launder, and tail gas goes out
Mouth c4 is connected to the falling liquid film import d1 of second level film-falling absorption tower, and absorbing liquid import d2 is connected to unsaturated absorbing liquid conveyance conduit, is inhaled
It receives liquid outlet d3 to be connected to circulation import c5, offgas outlet d4 is connected to secondary extraction duct；
In secondary absorption tower group, the stage falling-film absorption tower includes falling liquid film import c6, absorbing liquid import c7, absorbing liquid
Export c8, offgas outlet c9 and circulation import c10, the second level film-falling absorption tower include falling liquid film import d6, absorbing liquid import d7,
Absorbing liquid exports d8 and offgas outlet d9, and the falling liquid film import c6 on stage falling-film absorption tower is connected to secondary extraction duct, absorbing liquid
Import c7 is connected to unsaturated absorbing liquid conveyance conduit, and absorbing liquid outlet c8 washs pipeline with No.1 again and is connected to, offgas outlet c9
It is connected to the falling liquid film import d6 of second level film-falling absorption tower, absorbing liquid import d7 is connected to unsaturated absorbing liquid conveyance conduit, absorbing liquid
Outlet d8 is connected to circulation import c10, and offgas outlet d9 is connected to gas-liquid separator；
The gas-liquid separator includes separation import e1, gaseous phase outlet e2 and liquid-phase outlet e3, and separation import e passes through pipeline
It being connected to offgas outlet d9, gaseous phase outlet e2 is connected to residual gas recovery channel, and liquid-phase outlet e3 is connected to No. two and washs pipeline again,
The top of the A grade hydrochloric acid medial launder and B grade hydrochloric acid medial launder is just equipped with exhaust pipe, the exhaust pipe and residual gas recovery tube
Road connection, the residual gas recovery channel are equipped with HCL blower；
Sulphuric acid gas washer in the secondary wash tower group is divided by front-rear position, respectively B3 scrubbing tower, No. B4
Scrubbing tower, B5 scrubbing tower and B6 scrubbing tower, in secondary absorption tower group, the stage falling-film in 2 groups of film-falling absorption tower groups absorbs
The absorbing liquid outlet c8 of tower washs pipeline by No.1 again, connects respectively with the washing import b1 of B4 scrubbing tower, B3 scrubbing tower
Logical, the gaseous phase outlet e2 of exhaust pipe and gas-liquid separator passes through the washing import b1 of residual gas recovery channel and B3 scrubbing tower
Connection, the liquid-phase outlet e3 of gas-liquid separator wash pipeline by No. two again and are connected to the washing import b1 of B3 scrubbing tower, B6
The washing import b1 and process water pipeline connection of number scrubbing tower, the washing of washing the outlet b3 and B4 scrubbing tower of B3 scrubbing tower
The washing outlet b3 of import b1 connection, B4 scrubbing tower is connected to the washing import b1 of B5 scrubbing tower, and B5 scrubbing tower is washed
It washs outlet b3 to be connected to the washing import b1 of B6 scrubbing tower, and the acid solution inlet and outlet b2 of adjacent 2 scrubbing towers is interconnected；
In secondary wash tower group, B3 scrubbing tower, B4 scrubbing tower, B5 scrubbing tower and B6 scrubbing tower circulation pipe
Unsaturated acid line is connected on the b4 of road, the relieving haperacidity bucket includes exporting into bung hole, upper liquid outlet and subnatant, described
It being connected into bung hole with unsaturated acid line, the upper liquid outlet is connected to the washing import b1 of B3 scrubbing tower by pipeline,
The subnatant outlet cooling tower, the cooling tower include feed inlet f1, cooling water inlet f2, steam (vapor) outlet f3 and discharging
Mouth f4, the feed inlet f1 and subnatant outlet, the cooling water inlet f2 are connected to water distributor, the steam (vapor) outlet
F3 is connected to return water bucket, and the discharge port f4 is connected to unsaturated absorbing liquid conveyance conduit, and is in charge of connection by multiple conveyings
The absorbing liquid import d2 of second level film-falling absorption tower in primary absorbent tower group, secondary absorption tower group；
In the water circulating cooling component, the return water bucket receives vapor, and condenses into hot water, the cyclic water tank by
Boiler and cold water storage cistern are constituted, and return water bucket is connected to boiler, and is connected to cooling tower, the cooling tower water outlet by hot water pump group
It is connected to cold water storage cistern, and cooling water storage tank is connected to by cold water pump group, the cooling water storage tank is connected to water distributor, supply cooling
Water.
The environment-protective process of above-mentioned a kind of purification potassium sulfate production tail gas, wherein carried out using the tail gas treatment device
The environment-protective process of vent gas treatment includes technical process in detail below:
(1) tail gas is cooling: the hydrogen chloride tail gas of Mannheim reacting furnace discharge through exhaust pipe road and inlet exhaust gas a1, into
Entering graphite cooler, is cooled down, cooling water is supplied by water circulating cooling component, via water distributor, cooling liquid inlet a2,
Into graphite cooler, hydrogen chloride tail gas dissolves in cooling water, and generates amount of heat, generates crude hydrochloric acid and generates a large amount of water and steams
Gas, crude hydrochloric acid is not together with being dissolved in the hydrogen chloride tail gas of water partially through coolant outlet a4, into primary scrubbing tower group, vapor warp
By steam (vapor) outlet a3, hot water is condensed into return water bucket；
(2) B acid produces: enter the crude hydrochloric acid and partial oxidation hydrogen tail gas of primary scrubbing tower group in step (1), successively into
Enter B1 scrubbing tower and B2 scrubbing tower, carry out continuous washing of connecting, removes sulfuric acid gas, B1 scrubbing tower and B2 scrubbing tower are also
Circulation washing can be independently carried out by circulation line b4, be completed when washing, the bottom liquid of B1 scrubbing tower and B2 scrubbing tower, i.e.,
A small amount of hydrogen chloride gas for B grade hydrochloric acid semi-finished product, the washing outlet b3 discharge through B2 scrubbing tower enters primary absorbent tower group,
B grade hydrochloric acid semi-finished product are through B grade hydrochloric acid conveyance conduit, into B grade hydrochloric acid medial launder, after pH-value is adjusted to PH6~9, i.e.,
B grade hydrochloric acid finished product is obtained, it can tinning commission；
(3) A acid produces: synchronous to enter 3 groups of falling film absorptions in parallel into a small amount of hydrogen chloride gas of primary absorbent tower group
It in tower group, in stage falling-film absorption tower and second level film-falling absorption tower, is absorbed by liquid absorption, obtains A grade hydrochloric acid semi-finished product, seldom
The hydrogen chloride gas of amount passes through secondary extraction duct, imports in the group of secondary absorption tower；Absorbing liquid is dilute hydrochloric acid, is absorbed by unsaturation
The supply of liquid conveyance conduit, obtained A grade hydrochloric acid semi-finished product import A grade hydrochloric acid medial launder and obtain A grades of salt after adjusting pH-value
Sour finished product, can tinning commission；
(4) dilute hydrochloric acid produces: the minimal amount of hydrogen chloride gas being imported into secondary absorption tower group is absorbed by liquid absorption,
At this point, bottom liquid level is dilute hydrochloric acid semi-finished product in the group of secondary absorption tower, dilute hydrochloric acid semi-finished product wash pipeline and No. two by No.1 again
Pipeline is washed again, is imported in secondary wash tower group, and micro hydrogen chloride gas is discharged by secondary absorption tower group, and by gas-liquid point
After device separation, it is introduced separately to secondary absorption tower group, wherein the micro hydrogen chloride gas isolated imports residual first
In gas recovery conduit, A grade hydrochloric acid medial launder and the possible remaining hydrogen chloride gas of B grade hydrochloric acid medial launder pass through exhaust pipe
It imports in residual gas recovery channel, last passes through HCL blower together and is directed into secondary absorption tower group；Through 4 sulfuric acid air purges
After washing tower series connection washing, dilute hydrochloric acid is obtained, is subsequently introduced and is stored in relieving haperacidity bucket, dilute hydrochloric acid concentration can lead in relieving haperacidity bucket
It crosses and water or concentrated hydrochloric acid is added to be adjusted, guarantee lower layer of the dilute hydrochloric acid concentration between 10%~31%, through relieving haperacidity bucket after
Liquid outlet is primary absorbent tower group and secondary absorption tower group, provides dilute hydrochloric acid into unsaturated absorbing liquid conveyance conduit；
(5) cooling water recycles: gaseous phase outlet c0 is equipped on the stage falling-film absorption tower, derived from putting for hydrogen chloride and water
Thermal response, stage falling-film absorption tower can gather a large amount of vapor, and vapor is discharged into return water bucket through gaseous phase outlet c0, with step (1)
In vapor, condense into hot water together, subsequently enter boiler, cooling tower is sent by hot water pump group, is sent into after cooling cold
Water tank is then sent into cooling water storage tank by cold water pump group, and is that graphite cooler and stage falling-film absorb by water distributor
Tower provides cooling water.
The environment-protective process of above-mentioned a kind of purification potassium sulfate production tail gas, wherein the hot water pump group is by least two hot water
Pump is in parallel to be constituted.
The environment-protective process of above-mentioned a kind of purification potassium sulfate production tail gas, wherein the cold water pump group is by least two cold water
Pump is in parallel to be constituted.
The environment-protective process of above-mentioned a kind of purification potassium sulfate production tail gas, wherein the cooling water storage tank is by least two height
Position storage tank parallel connection is constituted.
The environment-protective process of above-mentioned a kind of purification potassium sulfate production tail gas, wherein the primary absorbent tower group and secondary suction
It receives in tower group, the process of absorbing liquid absorbing hydrogen chloride gas can be independently on the stage falling-film absorption tower of same film-falling absorption tower group
It recycles and carries out between second level film-falling absorption tower, promote the absorptivity of hydrogen chloride gas.
The environment-protective process of above-mentioned a kind of purification potassium sulfate production tail gas, wherein the primary scrubbing tower group, secondary wash
In tower group, it is consistent that bottom liquid liquid level in the connected sulphuric acid gas washer of b2 is imported and exported by acid solution.
The environment-protective process of above-mentioned a kind of purification potassium sulfate production tail gas, wherein the quantity of the HCL blower is at least 2
It is a, mutually it is in parallel.
The environment-protective process of above-mentioned a kind of purification potassium sulfate production tail gas, wherein be equipped with above the high position water pot
Overflow pipe, and the overflow pipe is connected to cold water storage cistern.
The environment-protective process of above-mentioned a kind of purification potassium sulfate production tail gas, wherein the technique water lines recycle cold with water
But component separates, and provides process water for B6 scrubbing tower, the process water is purified water or dilute hydrochloric acid.
The environment-protective process of above-mentioned a kind of purification potassium sulfate production tail gas, wherein the A grade hydrochloric acid medial launder and B grades of salt
It is equipped with hydrochloric acid pump below sour medial launder, and connection A grade hydrochloric acid storage tank and B grade hydrochloric acid storage tank are pumped by hydrochloric acid respectively.
The invention has the benefit that
A kind of environment-protective process purifying potassium sulfate production tail gas proposed by the present invention, carries out tail gas by tail gas treatment device
Processing, tail gas treatment device include exhaust pipe road, graphite cooler, primary scrubbing tower group, secondary wash tower group, primary suction
Tower group, secondary absorption tower group, gas-liquid separator, relieving haperacidity bucket, hydrochloric acid medial launder and water circulating cooling component are received, environment-protective process
Process flow includes that cooling tail gas, the production of B acid, the production of A acid, dilute hydrochloric acid production and cooling water circulation, the present invention are directed to existing tail
Gas disposal there are the problem of, carry out exploitation improvement, can produce more specification hydrochloric acid, hydrochloric acid obtain extracting rate is high, grade is high, it is high-quality, sell
Lu Hao, the hydrogen chloride tail gas handled through the invention, absorptivity is high, meets emission request, and process water and recirculated water combine, section
About enterprise water use meets enterprise's low cost, efficient production requirement, also complies with the environmental requirement of energy-saving and emission-reduction.
Detailed description of the invention
Fig. 1 is tail gas treatment device schematic diagram.
Fig. 2 is water circulating cooling component.
Fig. 3 is graphite cooler and primary scrubbing tower group connection schematic diagram.
Fig. 4 is hydrochloric acid medial launder schematic diagram.
Fig. 5 is primary absorbent tower group and secondary absorption tower group connection schematic diagram.
Fig. 6 is primary absorbent tower group schematic diagram.
Fig. 7 is secondary absorption tower group schematic diagram.
Fig. 8 is secondary absorption tower group, gas-liquid separator and relieving haperacidity bucket connection schematic diagram.
Specific embodiment
Clear to be more clear technical solution of the present invention, the present invention is described further with reference to the accompanying drawing,
The technical characteristic of any pair of technical solution of the present invention carries out the scheme that equivalencing is obtained with conventional reasoning and each falls within guarantor of the present invention
Protect range.
In the water circulating cooling component, the return water bucket receives vapor, and condenses into hot water, the cyclic water tank by
Boiler and cold water storage cistern are constituted, and return water bucket is connected to boiler, and is connected to cooling tower, the cooling tower water outlet by hot water pump group
It is connected to cold water storage cistern, and cooling water storage tank is connected to by cold water pump group, the cooling water storage tank is connected to water distributor, supply cooling
Water.
Drawing reference numeral explanation: 1, return water bucket；2, cyclic water tank；3, cooling tower；4, hot water pump group；5, cold water pump group；6, it stores up
Water pot group；41, exhaust pipe road；45, boiler；46, cold water storage cistern；47, technique water lines；49, water distributor；50, gas-liquid
Separator；51, relieving haperacidity bucket；52, hydrochloric acid medial launder；53, A grade hydrochloric acid medial launder；54, B grade hydrochloric acid medial launder；55, hydrochloric acid pumps；
56, cooling line again；57, B grade hydrochloric acid conveyance conduit；58, unsaturated absorbing liquid conveyance conduit；59, secondary extraction duct；60,
No.1 washs pipeline again；61, residual gas recovery channel；62, No. two are washed pipeline again；63, exhaust pipe；64, HCL blower；65,
Into bung hole；66, upper liquid exports；67, subnatant exports；68, overflow pipe；73, A grade hydrochloric acid storage tank；74, B grade hydrochloric acid storage tank；
75, cooling tower；76, unsaturated acid line；A, graphite cooler；B, sulphuric acid gas washer；C, stage falling-film absorption tower；D, two
Grade film-falling absorption tower；
The technical solution noun of included number: inlet exhaust gas a1；Cooling liquid inlet a2,；Steam (vapor) outlet a3；Coolant outlet
a4；Wash import b1；Acid solution imports and exports b2；Washing outlet b3；Circulation line b4；Falling liquid film import c1；Absorbing liquid import c2；It absorbs
Liquid exports c3；Offgas outlet c4；Recycle import c5；Falling liquid film import d1；Absorbing liquid import d2；Absorbing liquid exports d3；Offgas outlet
d4；Separate import e1；Gaseous phase outlet e2；Liquid-phase outlet e3；Feed inlet f1；Cooling water inlet f2；Steam (vapor) outlet f3；Discharge port
f4；B1 scrubbing tower；B2 scrubbing tower；B3 scrubbing tower；B4 scrubbing tower；B5 scrubbing tower；B6 scrubbing tower.
Embodiment
The environment-protective process of a kind of purification potassium sulfate production tail gas as shown in the figure, which is characterized in that the environment-protective process passes through
Tail gas treatment device carries out vent gas treatment, and the process flow of environment-protective process includes that tail gas is cooling, B acid produces, A acid produces, is dilute
Hydrochloric acid production and cooling water circulation.
The environment-protective process of above-mentioned a kind of purification potassium sulfate production tail gas, wherein the tail gas treatment device includes tail gas
Conveyance conduit, graphite cooler, primary scrubbing tower group, secondary wash tower group, primary absorbent tower group, secondary absorption tower group, gas-liquid
Separator, relieving haperacidity bucket, hydrochloric acid medial launder and water circulating cooling component, the primary scrubbing tower group is by 2 sulphuric acid gas washers
In series, the secondary wash tower group is in series by 4 sulphuric acid gas washers, and the primary absorbent tower group is by 3 groups of falling liquid films
Absorption tower group is constituted, and the secondary absorption tower group is made of 2 groups of film-falling absorption tower groups, and the hydrochloric acid medial launder includes A grade hydrochloric acid
Medial launder and B grade hydrochloric acid medial launder, the water circulating cooling component include return water bucket, cyclic water tank, hot water pump group, cooling tower,
Cold water pump group, cooling water storage tank and water distributor；
The exhaust pipe road is connected to Mannheim reacting furnace, and receives the tail gas of Mannheim reacting furnace discharge, the stone
Black cooler includes inlet exhaust gas a1, cooling liquid inlet a2, steam (vapor) outlet a3 and coolant outlet a4, the inlet exhaust gas a1 with
The connection of exhaust pipe road, receives tail gas, and cooling liquid inlet a2 is connected to water distributor, and steam (vapor) outlet a3 is connected to return water bucket,
Coolant outlet a4 is connected to primary scrubbing tower group；
The sulphuric acid gas washer includes washing import b1, acid solution inlet and outlet b2, washs outlet b3 and circulation line b4, just
Sulphuric acid gas washer in grade scrubbing tower group is divided by front-rear position, respectively B1 scrubbing tower and B2 scrubbing tower, and No. B1 is washed
The washing import b1 for washing tower is connected to the coolant outlet a4 of graphite cooler, and the acid solution inlet and outlet b2 of B1 scrubbing tower is washed with No. B2
The acid solution inlet and outlet b2 for washing tower is interconnected, and the washing outlet b3 of B1 scrubbing tower and the washing import b1 of B2 scrubbing tower connect
Logical, the both ends of circulation line b4 are respectively communicated with the top and tail portion of sulphuric acid gas washer, and are equipped with hydrochloric acid and pump, B1 scrubbing tower
It is connected with cooling line again on circulation line b4, B grade hydrochloric acid conveyance conduit, institute are connected on the circulation line b4 of B2 scrubbing tower
Cooling line connection graphite cooler is stated again, the B grade hydrochloric acid conveyance conduit is connected to B grade hydrochloric acid medial launder；
3 groups of film-falling absorption tower groups for constituting the primary absorbent tower group are successively in parallel, constitute the 2 of the secondary absorption tower group
Group film-falling absorption tower group is successively in parallel, and the film-falling absorption tower group is by 1 stage falling-film absorption tower and 1 second level film-falling absorption tower
It is in series；
In primary absorbent tower group, the stage falling-film absorption tower includes falling liquid film import c1, absorbing liquid import c2, absorbing liquid
Export c3, offgas outlet c4 and circulation import c5, the second level film-falling absorption tower include falling liquid film import d1, absorbing liquid import d2,
Absorbing liquid exports d3 and offgas outlet d4, and the falling liquid film import c1 on stage falling-film absorption tower passes through the washing of pipeline and B2 scrubbing tower
B3 connection is exported, absorbing liquid import c2 is connected to water distributor, and absorbing liquid outlet c3 is connected to A grade hydrochloric acid medial launder, and tail gas goes out
Mouth c4 is connected to the falling liquid film import d1 of second level film-falling absorption tower, and absorbing liquid import d2 is connected to unsaturated absorbing liquid conveyance conduit, is inhaled
It receives liquid outlet d3 to be connected to circulation import c5, offgas outlet d4 is connected to secondary extraction duct；
In secondary absorption tower group, the stage falling-film absorption tower includes falling liquid film import c6, absorbing liquid import c7, absorbing liquid
Export c8, offgas outlet c9 and circulation import c10, the second level film-falling absorption tower include falling liquid film import d6, absorbing liquid import d7,
Absorbing liquid exports d8 and offgas outlet d9, and the falling liquid film import c6 on stage falling-film absorption tower is connected to secondary extraction duct, absorbing liquid
Import c7 is connected to unsaturated absorbing liquid conveyance conduit, and absorbing liquid outlet c8 washs pipeline with No.1 again and is connected to, offgas outlet c9
It is connected to the falling liquid film import d6 of second level film-falling absorption tower, absorbing liquid import d7 is connected to unsaturated absorbing liquid conveyance conduit, absorbing liquid
Outlet d8 is connected to circulation import c10, and offgas outlet d9 is connected to gas-liquid separator；
The gas-liquid separator includes separation import e1, gaseous phase outlet e2 and liquid-phase outlet e3, and separation import e passes through pipeline
It being connected to offgas outlet d9, gaseous phase outlet e2 is connected to residual gas recovery channel, and liquid-phase outlet e3 is connected to No. two and washs pipeline again,
The top of the A grade hydrochloric acid medial launder and B grade hydrochloric acid medial launder is just equipped with exhaust pipe, the exhaust pipe and residual gas recovery tube
Road connection, the residual gas recovery channel are equipped with HCL blower；
Sulphuric acid gas washer in the secondary wash tower group is divided by front-rear position, respectively B3 scrubbing tower, No. B4
Scrubbing tower, B5 scrubbing tower and B6 scrubbing tower, in secondary absorption tower group, the stage falling-film in 2 groups of film-falling absorption tower groups absorbs
The absorbing liquid outlet c8 of tower washs pipeline by No.1 again, connects respectively with the washing import b1 of B4 scrubbing tower, B3 scrubbing tower
Logical, the gaseous phase outlet e2 of exhaust pipe and gas-liquid separator passes through the washing import b1 of residual gas recovery channel and B3 scrubbing tower
Connection, the liquid-phase outlet e3 of gas-liquid separator wash pipeline by No. two again and are connected to the washing import b1 of B3 scrubbing tower, B6
The washing import b1 and process water pipeline connection of number scrubbing tower, the washing of washing the outlet b3 and B4 scrubbing tower of B3 scrubbing tower
The washing outlet b3 of import b1 connection, B4 scrubbing tower is connected to the washing import b1 of B5 scrubbing tower, and B5 scrubbing tower is washed
It washs outlet b3 to be connected to the washing import b1 of B6 scrubbing tower, and the acid solution inlet and outlet b2 of adjacent 2 scrubbing towers is interconnected；
In secondary wash tower group, B3 scrubbing tower, B4 scrubbing tower, B5 scrubbing tower and B6 scrubbing tower circulation pipe
Unsaturated acid line is connected on the b4 of road, the relieving haperacidity bucket includes exporting into bung hole, upper liquid outlet and subnatant, described
It being connected into bung hole with unsaturated acid line, the upper liquid outlet is connected to the washing import b1 of B3 scrubbing tower by pipeline,
The subnatant outlet cooling tower, the cooling tower include feed inlet f1, cooling water inlet f2, steam (vapor) outlet f3 and discharging
Mouth f4, the feed inlet f1 and subnatant outlet, the cooling water inlet f2 are connected to water distributor, the steam (vapor) outlet
F3 is connected to return water bucket, and the discharge port f4 is connected to unsaturated absorbing liquid conveyance conduit, and is in charge of connection by multiple conveyings
The absorbing liquid import d2 of second level film-falling absorption tower in primary absorbent tower group, secondary absorption tower group；
In the water circulating cooling component, the return water bucket receives vapor, and condenses into hot water, the cyclic water tank by
Boiler and cold water storage cistern are constituted, and return water bucket is connected to boiler, and is connected to cooling tower, the cooling tower water outlet by hot water pump group
It is connected to cold water storage cistern, and cooling water storage tank is connected to by cold water pump group, the cooling water storage tank is connected to water distributor, supply cooling
Water.
The environment-protective process of above-mentioned a kind of purification potassium sulfate production tail gas, wherein carried out using the tail gas treatment device
The environment-protective process of vent gas treatment includes technical process in detail below:
(1) tail gas is cooling: the hydrogen chloride tail gas of Mannheim reacting furnace discharge through exhaust pipe road and inlet exhaust gas a1, into
Entering graphite cooler, is cooled down, cooling water is supplied by water circulating cooling component, via water distributor, cooling liquid inlet a2,
Into graphite cooler, hydrogen chloride tail gas dissolves in cooling water, and generates amount of heat, generates crude hydrochloric acid and generates a large amount of water and steams
Gas, crude hydrochloric acid is not together with being dissolved in the hydrogen chloride tail gas of water partially through coolant outlet a4, into primary scrubbing tower group, vapor warp
By steam (vapor) outlet a3, hot water is condensed into return water bucket；
(2) B acid produces: enter the crude hydrochloric acid and partial oxidation hydrogen tail gas of primary scrubbing tower group in step (1), successively into
Enter B1 scrubbing tower and B2 scrubbing tower, carry out continuous washing of connecting, removes sulfuric acid gas, B1 scrubbing tower and B2 scrubbing tower are also
Circulation washing can be independently carried out by circulation line b4, be completed when washing, the bottom liquid of B1 scrubbing tower and B2 scrubbing tower, i.e.,
A small amount of hydrogen chloride gas for B grade hydrochloric acid semi-finished product, the washing outlet b3 discharge through B2 scrubbing tower enters primary absorbent tower group,
B grade hydrochloric acid semi-finished product are through B grade hydrochloric acid conveyance conduit, into B grade hydrochloric acid medial launder, after pH-value is adjusted to PH6~9, i.e.,
B grade hydrochloric acid finished product is obtained, it can tinning commission；
(3) A acid produces: synchronous to enter 3 groups of falling film absorptions in parallel into a small amount of hydrogen chloride gas of primary absorbent tower group
It in tower group, in stage falling-film absorption tower and second level film-falling absorption tower, is absorbed by liquid absorption, obtains A grade hydrochloric acid semi-finished product, seldom
The hydrogen chloride gas of amount passes through secondary extraction duct, imports in the group of secondary absorption tower；Absorbing liquid is dilute hydrochloric acid, is absorbed by unsaturation
The supply of liquid conveyance conduit, obtained A grade hydrochloric acid semi-finished product import A grade hydrochloric acid medial launder and obtain A grades of salt after adjusting pH-value
Sour finished product, can tinning commission；
(4) dilute hydrochloric acid produces: the minimal amount of hydrogen chloride gas being imported into secondary absorption tower group is absorbed by liquid absorption,
At this point, bottom liquid level is dilute hydrochloric acid semi-finished product in the group of secondary absorption tower, dilute hydrochloric acid semi-finished product wash pipeline and No. two by No.1 again
Pipeline is washed again, is imported in secondary wash tower group, and micro hydrogen chloride gas is discharged by secondary absorption tower group, and by gas-liquid point
After device separation, it is introduced separately to secondary absorption tower group, wherein the micro hydrogen chloride gas isolated imports residual first
In gas recovery conduit, A grade hydrochloric acid medial launder and the possible remaining hydrogen chloride gas of B grade hydrochloric acid medial launder pass through exhaust pipe
It imports in residual gas recovery channel, last passes through HCL blower together and is directed into secondary absorption tower group；Through 4 sulfuric acid air purges
After washing tower series connection washing, dilute hydrochloric acid is obtained, is subsequently introduced and is stored in relieving haperacidity bucket, dilute hydrochloric acid concentration can lead in relieving haperacidity bucket
It crosses and water or concentrated hydrochloric acid is added to be adjusted, guarantee lower layer of the dilute hydrochloric acid concentration between 10%~31%, through relieving haperacidity bucket after
Liquid outlet is primary absorbent tower group and secondary absorption tower group, provides dilute hydrochloric acid into unsaturated absorbing liquid conveyance conduit；
(5) cooling water recycles: gaseous phase outlet c0 is equipped on the stage falling-film absorption tower, derived from putting for hydrogen chloride and water
Thermal response, stage falling-film absorption tower can gather a large amount of vapor, and vapor is discharged into return water bucket through gaseous phase outlet c0, with step (1)
In vapor, condense into hot water together, subsequently enter boiler, cooling tower is sent by hot water pump group, is sent into after cooling cold
Water tank is then sent into cooling water storage tank by cold water pump group, and is that graphite cooler and stage falling-film absorb by water distributor
Tower provides cooling water.
Wherein, the hot water pump group is made of at least two heat-exchanger pump parallel connection, and the cold water pump group is by least two water supply pump
Parallel connection is constituted, and the cooling water storage tank is made of at least two high position storage tank parallel connection；
In the primary absorbent tower group and secondary absorption tower group, the process of absorbing liquid absorbing hydrogen chloride gas can independently exist
It recycles and carries out between the stage falling-film absorption tower and second level film-falling absorption tower of same film-falling absorption tower group, promote hydrogen chloride gas
Absorptivity；
In the primary scrubbing tower group, secondary wash tower group, imported and exported in the connected sulphuric acid gas washer of b2 by acid solution
Bottom liquid liquid level is consistent；
The quantity of the HCL blower is at least 2, is mutually in parallel, and is equipped with overflow pipe above the high position water pot,
And the overflow pipe is connected to cold water storage cistern；
The technique water lines are separated with water circulating cooling component, provide process water, the process water for B6 scrubbing tower
For purified water or dilute hydrochloric acid, hydrochloric acid pump is equipped with below the A grade hydrochloric acid medial launder and B grade hydrochloric acid medial launder, and respectively
Connection A grade hydrochloric acid storage tank and B grade hydrochloric acid storage tank are pumped by hydrochloric acid.
The foregoing is only a preferred embodiment of the present invention, but scope of protection of the present invention is not limited thereto,
In the technical scope disclosed by the present invention, any changes or substitutions that can be easily thought of by anyone skilled in the art,
It should be covered by the scope of protection of the present invention.Therefore, protection scope of the present invention should be with the protection scope of claims
Subject to.
Claims (8)
1. a kind of environment-protective process for purifying potassium sulfate production tail gas, which is characterized in that the environment-protective process passes through tail gas treatment device
Vent gas treatment is carried out, and the process flow of environment-protective process includes cooling tail gas, the production of B acid, A acid produces, dilute hydrochloric acid produces and cold
But water recycles.
2. the environment-protective process of as described in claim a kind of purification potassium sulfate production tail gas, which is characterized in that the vent gas treatment
Equipment includes exhaust pipe road, graphite cooler, primary scrubbing tower group, secondary wash tower group, primary absorbent tower group, secondary suction
Tower group, gas-liquid separator, relieving haperacidity bucket, hydrochloric acid medial launder and water circulating cooling component are received, the primary scrubbing tower group is by 2 sulphur
Acid gas wash tower is in series, and the secondary wash tower group is in series by 4 sulphuric acid gas washers, the primary absorbent tower group
It is made of 3 groups of film-falling absorption tower groups, the secondary absorption tower group is made of 2 groups of film-falling absorption tower groups, the hydrochloric acid medial launder packet
A grade hydrochloric acid medial launder and B grade hydrochloric acid medial launder are included, the water circulating cooling component includes return water bucket, cyclic water tank, heat-exchanger pump
Group, cooling tower, cold water pump group, cooling water storage tank and water distributor；
The exhaust pipe road is connected to Mannheim reacting furnace, and receives the tail gas of Mannheim reacting furnace discharge, and the graphite is cold
But device includes inlet exhaust gas a1, cooling liquid inlet a2, steam (vapor) outlet a3 and coolant outlet a4, the inlet exhaust gas a1 and tail gas
Conveyance conduit connection, receives tail gas, and cooling liquid inlet a2 is connected to water distributor, and steam (vapor) outlet a3 is connected to return water bucket, cooling
Outlet a4 is connected to primary scrubbing tower group；
The sulphuric acid gas washer includes that washing import b1, acid solution inlet and outlet b2, washing outlet b3 and circulation line b4, primary are washed
The sulphuric acid gas washer washed in tower group is divided by front-rear position, respectively B1 scrubbing tower and B2 scrubbing tower, B1 scrubbing tower
Washing import b1 be connected to the coolant outlet a4 of graphite cooler, the acid solution of B1 scrubbing tower inlet and outlet b2 and B2 scrubbing tower
Acid solution inlet and outlet b2 interconnect, the washing of B1 scrubbing tower exports b3 and is connected to the washing import b1 of B2 scrubbing tower, follows
The both ends of endless tube road b4 are respectively communicated with the top and tail portion of sulphuric acid gas washer, and are equipped with hydrochloric acid and pump, the circulation of B1 scrubbing tower
Be connected with cooling line again on pipeline b4, be connected with B grade hydrochloric acid conveyance conduit on the circulation line b4 of B2 scrubbing tower, it is described again
Cooling line is connected to graphite cooler, and the B grade hydrochloric acid conveyance conduit is connected to B grade hydrochloric acid medial launder；
3 groups of film-falling absorption tower groups for constituting the primary absorbent tower group are successively in parallel, constitute 2 groups of drops of the secondary absorption tower group
Film absorption tower group is successively in parallel, and the film-falling absorption tower group is connected by 1 stage falling-film absorption tower and 1 second level film-falling absorption tower
It constitutes；
In primary absorbent tower group, the stage falling-film absorption tower includes falling liquid film import c1, absorbing liquid import c2, absorbing liquid outlet
C3, offgas outlet c4 and circulation import c5, the second level film-falling absorption tower include falling liquid film import d1, absorbing liquid import d2, absorb
Liquid exports d3 and offgas outlet d4, and the falling liquid film import c1 on stage falling-film absorption tower is exported by the washing of pipeline and B2 scrubbing tower
B3 connection, absorbing liquid import c2 are connected to water distributor, and absorbing liquid outlet c3 is connected to A grade hydrochloric acid medial launder, offgas outlet c4
It is connected to the falling liquid film import d1 of second level film-falling absorption tower, absorbing liquid import d2 is connected to unsaturated absorbing liquid conveyance conduit, absorbing liquid
Outlet d3 is connected to circulation import c5, and offgas outlet d4 is connected to secondary extraction duct；
In secondary absorption tower group, the stage falling-film absorption tower includes falling liquid film import c6, absorbing liquid import c7, absorbing liquid outlet
C8, offgas outlet c9 and circulation import c10, the second level film-falling absorption tower include falling liquid film import d6, absorbing liquid import d7, absorb
Liquid exports d8 and offgas outlet d9, and the falling liquid film import c6 on stage falling-film absorption tower is connected to secondary extraction duct, absorbing liquid import
C7 is connected to unsaturated absorbing liquid conveyance conduit, and absorbing liquid outlet c8 washs pipeline with No.1 again and is connected to, offgas outlet c9 and two
The falling liquid film import d6 connection of grade film-falling absorption tower, absorbing liquid import d7 are connected to unsaturated absorbing liquid conveyance conduit, absorbing liquid outlet
D8 is connected to circulation import c10, and offgas outlet d9 is connected to gas-liquid separator；
The gas-liquid separator includes separation import e1, gaseous phase outlet e2 and liquid-phase outlet e3, and separation import e passes through pipeline and tail
Gas exports d9 connection, and gaseous phase outlet e2 is connected to residual gas recovery channel, and liquid-phase outlet e3 is connected to No. two and washs pipeline again, described
The top of A grade hydrochloric acid medial launder and B grade hydrochloric acid medial launder is just equipped with exhaust pipe, and the exhaust pipe and residual gas recovery channel connect
Logical, the residual gas recovery channel is equipped with HCL blower；
Sulphuric acid gas washer in the secondary wash tower group is divided by front-rear position, respectively B3 scrubbing tower, No. B4 washing
Tower, B5 scrubbing tower and B6 scrubbing tower, in secondary absorption tower group, stage falling-film absorption tower in 2 groups of film-falling absorption tower groups
Absorbing liquid outlet c8 washs pipeline by No.1 again, is connected to respectively with the washing import b1 of B4 scrubbing tower, B3 scrubbing tower, arranges
The gaseous phase outlet e2 of tracheae and gas-liquid separator is connected to by residual gas recovery channel with the washing import b1 of B3 scrubbing tower,
The liquid-phase outlet e3 of gas-liquid separator washs pipeline by No. two again and is connected to the washing import b1 of B3 scrubbing tower, No. B6 washing
The washing import b1 and process water pipeline connection of tower, the washing import b1 of washing the outlet b3 and B4 scrubbing tower of B3 scrubbing tower
The washing outlet b3 of connection, B4 scrubbing tower is connected to the washing import b1 of B5 scrubbing tower, the washing outlet of B5 scrubbing tower
B3 is connected to the washing import b1 of B6 scrubbing tower, and the acid solution inlet and outlet b2 of adjacent 2 scrubbing towers is interconnected；
In secondary wash tower group, B3 scrubbing tower, B4 scrubbing tower, B5 scrubbing tower and B6 scrubbing tower circulation line b4
On be connected with unsaturated acid line, the relieving haperacidity bucket include into bung hole, upper liquid outlet and subnatant outlet, it is described into bucket
Mouthful be connected to unsaturated acid line, the upper liquid exports the washing import b1 by pipeline connection B3 scrubbing tower, described
Subnatant outlet cooling tower, the cooling tower include feed inlet f1, cooling water inlet f2, steam (vapor) outlet f3 and discharge port
F4, the feed inlet f1 and subnatant outlet, the cooling water inlet f2 are connected to water distributor, the steam (vapor) outlet f3
It is connected to return water bucket, the discharge port f4 is connected to unsaturated absorbing liquid conveyance conduit, and is in charge of connection just by multiple conveyings
The absorbing liquid import d2 of second level film-falling absorption tower in grade absorption tower group, secondary absorption tower group；
In the water circulating cooling component, the return water bucket receives vapor, and condenses into hot water, and the cyclic water tank is by hot water
Case and cold water storage cistern are constituted, and return water bucket is connected to boiler, and is connected to cooling tower, the cooling tower water outlet connection by hot water pump group
Cold water storage cistern, and cooling water storage tank is connected to by cold water pump group, the cooling water storage tank is connected to water distributor, supplies cooling water.
3. the environment-protective process of as claimed in claim 2 kind of purification potassium sulfate production tail gas, which is characterized in that use the tail gas
The environment-protective process that processing equipment carries out vent gas treatment includes technical process in detail below:
(1) tail gas is cooling: the hydrogen chloride tail gas of Mannheim reacting furnace discharge is through exhaust pipe road and inlet exhaust gas a1, into stone
Black cooler, is cooled down, and cooling water is supplied by water circulating cooling component, via water distributor, cooling liquid inlet a2, enter
Graphite cooler, hydrogen chloride tail gas dissolves in cooling water, and generates amount of heat, generates crude hydrochloric acid and generates a large amount of vapor,
Crude hydrochloric acid is not together with being dissolved in the hydrogen chloride tail gas of water partially through coolant outlet a4, into primary scrubbing tower group, vapor via
Steam (vapor) outlet a3 condenses into hot water into return water bucket；
(2) B acid produces: entering the crude hydrochloric acid and partial oxidation hydrogen tail gas of primary scrubbing tower group in step (1), sequentially enters B1
Number scrubbing tower and B2 scrubbing tower carry out continuous washing of connecting, and remove sulfuric acid gas, B1 scrubbing tower and B2 scrubbing tower can also lead to
Circulation line b4 is crossed, circulation washing is independently carried out, is completed when washing, the bottom liquid of B1 scrubbing tower and B2 scrubbing tower, as B grades
A small amount of hydrogen chloride gas of hydrochloric acid semi-finished product, the washing outlet b3 discharge through B2 scrubbing tower enters primary absorbent tower group, B grades of salt
Sour semi-finished product are through B grade hydrochloric acid conveyance conduit, into B grade hydrochloric acid medial launder, to get B grades after pH-value is adjusted to PH6~9
Hydrochloric acid finished product, can tinning commission；
(3) A acid produces: synchronous to enter 3 groups of film-falling absorption tower groups in parallel into a small amount of hydrogen chloride gas of primary absorbent tower group
In, it in stage falling-film absorption tower and second level film-falling absorption tower, is absorbed by liquid absorption, obtains A grade hydrochloric acid semi-finished product, it is minimal amount of
Hydrogen chloride gas passes through secondary extraction duct, imports in the group of secondary absorption tower；Absorbing liquid is dilute hydrochloric acid, defeated by unsaturated absorbing liquid
Send pipeline to supply, obtained A grade hydrochloric acid semi-finished product, import A grade hydrochloric acid medial launder, after adjusting pH-value, obtain A grade hydrochloric acid at
Product, can tinning commission；
(4) dilute hydrochloric acid produces: the minimal amount of hydrogen chloride gas being imported into secondary absorption tower group is absorbed by liquid absorption, at this point,
Bottom liquid level is dilute hydrochloric acid semi-finished product in secondary absorption tower group, and dilute hydrochloric acid semi-finished product wash pipeline again by No.1 and No. two are washed again
Pipeline imports in secondary wash tower group, and micro hydrogen chloride gas is discharged by secondary absorption tower group, and by gas-liquid separator point
It from rear, is introduced separately to secondary absorption tower group, wherein the micro hydrogen chloride gas isolated imports residual gas first and returns
In closed tube road, A grade hydrochloric acid medial launder and the possible remaining hydrogen chloride gas of B grade hydrochloric acid medial launder are also imported residual by exhaust pipe
It stays in gas recovery conduit, last passes through HCL blower together and is directed into secondary absorption tower group；Through 4 sulphuric acid gas washer strings
After connection washing, dilute hydrochloric acid is obtained, is subsequently introduced and is stored in relieving haperacidity bucket, dilute hydrochloric acid concentration can be by adding water in relieving haperacidity bucket
Or concentrated hydrochloric acid is adjusted, and guarantees dilute hydrochloric acid concentration between 10%~31%, the subnatant outlet after through relieving haperacidity bucket,
Into unsaturated absorbing liquid conveyance conduit, it is primary absorbent tower group and secondary absorption tower group, dilute hydrochloric acid is provided；
(5) cooling water recycles: being equipped with gaseous phase outlet c0 on the stage falling-film absorption tower, the heat release derived from hydrogen chloride and water is anti-
It answers, stage falling-film absorption tower can gather a large amount of vapor, and vapor is discharged into return water bucket through gaseous phase outlet c0, in step (1)
Vapor condenses into hot water together, subsequently enters boiler, is sent into cooling tower by hot water pump group, is sent into cold water storage cistern after cooling,
Cooling water storage tank is then sent by cold water pump group, and by water distributor, is mentioned for graphite cooler and stage falling-film absorption tower
Cooling Water.
4. the environment-protective process of as claimed in claim 2 kind of purification potassium sulfate production tail gas, which is characterized in that the hot water pump group
Be made of at least two heat-exchanger pump parallel connection, the cold water pump group is made of at least two water supply pump parallel connection, the cooling water storage tank by
At least two high position storage tank parallel connection is constituted.
5. the environment-protective process of as claimed in claim 3 kind of purification potassium sulfate production tail gas, which is characterized in that the primary absorbent
In tower group and secondary absorption tower group, the process of absorbing liquid absorbing hydrogen chloride gas can be independently the one of same film-falling absorption tower group
It recycles and carries out between grade film-falling absorption tower and second level film-falling absorption tower, promote the absorptivity of hydrogen chloride gas.
6. the environment-protective process of as claimed in claim 3 kind of purification potassium sulfate production tail gas, which is characterized in that the primary washing
In tower group, secondary wash tower group, it is consistent that bottom liquid liquid level in the connected sulphuric acid gas washer of b2 is imported and exported by acid solution.
7. the environment-protective process of as claimed in claim 3 kind of purification potassium sulfate production tail gas, which is characterized in that the HCL blower
Quantity be at least 2, be mutually in parallel, be equipped with overflow pipe above the high position water pot, and overflow pipe connection is cold
Water tank.
8. the environment-protective process of as claimed in claim 3 kind of purification potassium sulfate production tail gas, which is characterized in that the technique water pipe
The separation of Lu Yushui circulating cooling component provides process water for B6 scrubbing tower, and the process water is purified water or dilute hydrochloric acid, institute
It states and is equipped with hydrochloric acid pump below A grade hydrochloric acid medial launder and B grade hydrochloric acid medial launder, and connection A grade hydrochloric acid is pumped by hydrochloric acid respectively
Storage tank and B grade hydrochloric acid storage tank.
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| CN113620249A (en) * | 2021-08-04 | 2021-11-09 | 河北卓泰肥业有限公司 | Method and production system for producing reagent hydrochloric acid by using Mannheim furnace tail gas |
| CN113666338A (en) * | 2021-09-14 | 2021-11-19 | 齐齐哈尔市茂尔农业有限公司 | Production device, heat dissipation mechanism and process flow of potassium sulfate byproduct hydrochloric acid by Mannheim method |
| CN113666338B (en) * | 2021-09-14 | 2022-10-28 | 齐齐哈尔市茂尔农业有限公司 | Production device, heat dissipation mechanism and process flow of potassium sulfate byproduct hydrochloric acid by Mannheim method |
| CN114288841A (en) * | 2021-12-31 | 2022-04-08 | 山东三方化工集团有限公司 | Mannheim method potassium sulfate tail gas processing system |
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| CN109758874B (en) | 2021-05-28 |
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