CN209702677U - Coke-stove gas sulfurous acid ammonium salt process deamination produces sulphur ammonium system - Google Patents
Coke-stove gas sulfurous acid ammonium salt process deamination produces sulphur ammonium system Download PDFInfo
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- CN209702677U CN209702677U CN201920026114.1U CN201920026114U CN209702677U CN 209702677 U CN209702677 U CN 209702677U CN 201920026114 U CN201920026114 U CN 201920026114U CN 209702677 U CN209702677 U CN 209702677U
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
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- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
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Abstract
The utility model provides a kind of coke-stove gas sulfurous acid ammonium salt process deamination production sulphur ammonium system, including combustion furnace, waste heat boiler, cooling tower, desulfurizing tower, Ammonic washing tower, oxidation trough, cooling water pump, desulfurization upper section circulating pump, desulfurization lower section circulating pump, ammonium sulfate solution circulating pump, washes ammonia recycle liquid pump and desulfurizing tower cooler.The utility model has the advantages that Low investment, low energy consumption, easily promotes, and solves the problems, such as that sulfuric acid washes ammonia process equipment seriously corroded using system deamination production sulphur ammonium.The utility model cooling water absorbs sulfur trioxide and generates sulfuric acid, can substitute the sulfuric acid of required outsourcing when production sulphur ammonium, and resource is comprehensively utilized.
Description
Technical field
The utility model relates to coal chemical technologies more particularly to a kind of coke-stove gas sulfurous acid ammonium salt process deamination to produce sulphur ammonium
System.
Background technique
The coal gas generated in coking by coke oven production contains the objectionable impurities such as ammonia, hydrogen sulfide, needs to handle by gas purification
Remove objectionable impurities and recycling chemical products；Purified treated coke-stove gas is as industrial fuel or chemical industry synthesis unstripped gas
It uses.Currently, coke-stove gas deamination mainly uses sulfuric acid absorption method, sulphur ammonium is produced with sulfuric acid absorption ammonia, which is work
Skill process is simple, and ammonium sulfate products are widely used；But processing medium corrosivity is strong, and maintenance of equipment expense is high, and it also requires outsourcing
Sulfuric acid increases production cost.Coke oven gas desulfurization hydrogen mainly uses absorption process and ammonia process wet oxidation.Absorption process is with alkalinity
Solution washs coal gas and absorbs hydrogen sulfide therein, and rich solution desorbs hydrogen sulfide containing sour vapour, and life is further processed after burning in sour vapour
Produce sulfuric acid or sulphur.Ammonia process wet oxidation is that hydrogen sulfide in coal gas is absorbed using the ammonia of coal gas itself as alkali source, and doctor solution is through oxygen
Metaplasia is starched at the sulphur being made of sulphur, ATS (Ammonium thiosulphate) and ammonium thiocyanate etc..The advantages of ammonia process wet oxidation is depriving hydrogen sulphide effect
Rate is high, saves operating cost without outsourcing alkali；The disadvantage is that sulphur slurry impurity composition is complicated, subsequent processing is costly.Handle sulphur slurry
The processes such as technique is to be burned sulphur slurry at the flue gas containing sulfur dioxide using relieving haperacidity technology, and flue gas is purified again, converts, absorbs
Sulfuric acid is made.Since the processing technological flow of sulphur slurry is long, corrosive medium is strong, investment and maintenance, operating cost height, very big ground resistance
The popularization and application of ammonia process Wet Oxidation Process are hindered.
Utility model content
The purpose of this utility model is that high for long flow path, investment in current coke oven gas desulfurization sulphur slurry acid-making process
The problem of needing to add outsourcing sulfuric acid in high problem and coke-stove gas production ammonium sulfate process with operating cost, proposes one
Kind coke-stove gas sulfurous acid ammonium salt process deamination produces thiamine process, which makees solvent absorption coke oven using ammonium sulfite salting liquid
Ammonia in coal gas, ammonium sulfite salting liquid burn the sulfur dioxide in generation flue gas and are able to again by absorbing sulphur slurry or sour vapour
Raw, the sulfurous acid ammonium salt that absorbing ammonia and sulfur dioxide generate is converted into sulphur ammonium through oxidation, effectively increases the utilization rate of resource.
In order to achieve the above purposes, the technical solution adopted by the utility model is:, and a kind of coke-stove gas sulfurous acid ammonium salt process is de-
Ammonia produces sulphur ammonium system, including combustion furnace, waste heat boiler, cooling tower, desulfurizing tower, Ammonic washing tower, oxidation trough, cooling water pump, desulfurization
Upper section circulating pump, ammonium sulfate solution circulating pump, washes ammonia recycle liquid pump, desulfurizing tower cooler at desulfurization lower section circulating pump:
The sulphur slurry or sour vapor pipeline, fuel gas pipeline and air pipe line are connect with combustion furnace entrance, and burning, which generates, contains dioxy
Change the flue gas of sulphur；
The combustion furnace exhanst gas outlet is connect with waste heat boiler smoke inlet, the waste heat boiler exhanst gas outlet and cooling tower
Smoke inlet connection, the cooling tower exhanst gas outlet are connect with desulfurizing tower smoke inlet, and the desulfurizing tower offgas outlet leads to atmosphere；
The coke-stove gas is connect with Ammonic washing tower gas entry, the Ammonic washing tower gas exit and subsequent coal gas treatment facility
Connection；
The Ammonic washing tower rich solution outlet is washed ammonia recycle liquid pump and washs each section of richness with Ammonic washing tower lean solution entrance, desulfurizing tower respectively
Liquid entrance, the connection of oxidation trough rich solution entrance；
The desulfurizing tower bottom lean solution outlet through desulfurization lower section circulating pump respectively with Ammonic washing tower lean solution entrance, desulfurizing tower cooler
Solution inlet connection；The desulfurizing tower cooler taphole is connect with desulfurizing tower washing lower section solution inlet；
The desulfurizing tower washing upper section taphole connects through desulfurization upper section circulating pump and desulfurizing tower washing upper section rich solution entrance
It connects；
The cleaning solution is connect with desulfurizing tower clean-up stage cleaning solution entrance, and the desulfurizing tower clean-up stage cleaning solution is exported and washed
Wash the connection of liquid treatment facility；
Cooling tower bottom cooling water outlet is connect with cooling tower cooling water inlet respectively through cooling water pump, oxidation trough is cold
But water inlet connects；
The oxygen-containing gas pipeline is connect with oxidation trough gas access, and the oxidation trough ammonium sulfate solution outlet is through ammonium sulfate solution
Circulating pump is connect with sulphur ammonium evaporative crystallization facility；
Cobaltous sulfate fixed bed catalyst is set in the oxidation trough.
The working principle that the utility model coke-stove gas sulfurous acid ammonium salt process deamination produces sulphur ammonium system is as follows:
Coke-stove gas sulfurous acid ammonium salt process deamination produces thiamine process, comprising the following steps:
The sulfurous acid ammonium salt lean solution counter current contacting that step 1, coal gas are sprayed with Ammonic washing tower tower top from bottom to top in Ammonic washing tower,
Ammonia therein is absorbed, and ammonia is reacted with ammonium bisulfite generates ammonium sulfite, forms sulfurous acid ammonium salt rich solution in Ammonic washing tower tower bottom；
The sulfurous acid ammonium salt that step 2, sulfur dioxide flue gas are sprayed with desulfurization column overhead from bottom to top in desulfurizing tower washing section
Rich solution counter current contacting, sulfur dioxide therein are absorbed, and sulfur dioxide is reacted with ammonium sulfite generates ammonium bisulfite, make sulfurous
Acid ammonium salt rich solution is regenerated as ammonium sulfite lean solution；
Desulfurizing tower washing section is that single hop or multisection type absorb, each section of independent loops, and SO in ammonium sulfite salting liquid3 =From
Sub- concentration is different, and each section is in increasing concen-trations trend from top to bottom；
Step 3 further washs flue gas with cleaning solution in desulfurizing tower clean-up stage, absorbs remaining sulfur dioxide in flue gas
And/or the impurity such as ammonia；
Step 4, sulphur slurry or sour vapour burn in combustion furnace generates high temperature sulfur dioxide flue gas, high temperature sulfur dioxide flue gas warp
Enter cooling tower after waste heat boiler heat exchange cooling；
Step 5, high temperature sulfur dioxide flue gas further cool down in cooling tower through cool water shower, and cooling water is in cooling cigarette
Sulfur trioxide micro in high temperature sulfur dioxide flue gas is absorbed while gas generates sulfuric acid；Cooling obtained sulfur dioxide flue gas is sent
To desulfurizing tower；
The part of sulfuric acid water of step 6, the part sulfurous acid ammonium salt rich solution at Ammonic washing tower bottom and cooling tower enters oxidation trough, oxidation
Oxygen-containing gas is blasted in slot, and cobaltous sulfate fixed bed catalyst is set in oxidation trough, and sulfurous acid ammonium salt is oxidized to sulphur ammonium.
Further, the sulphur slurry is the intermediate products that coal gas removing hydrogen sulfide generates, to contain sulphur and/or thio sulphur
The material of sour ammonium and ammonium thiocyanate.
Further, the sour vapour be absorption process desulfurization desorption generate contain hydrogen sulfide, hydrogen cyanide, carbon dioxide and water
The gas of steam.
Further, the ammonium sulfite salting liquid is the mixed liquor of ammonium sulfite and ammonium bisulfite.
Further, Ammonic washing tower uses ammonia in ammonium sulfite solution removing coal gas in the step 1.Ammonic washing tower bottom sulfurous acid
Ammonium salt rich solution pH value is 5.8~6.8, preferably pH value 6.5.
Further, the gas temperature of Ammonic washing tower is 23~55 DEG C in the step 1, and pressure is -5~30kPaG.
Further, desulfurizing tower is absorbed in flue gas using the ammonium sulfite rich solution that Ammonic washing tower tower bottom is formed in the step 2
SO2, sulfur dioxide reacted with ammonium sulfite generate ammonium bisulfite, be regenerated sulfurous acid ammonium salt rich solution for ammonium sulfite it is poor
Liquid.The desulfurizing tower bottom sulfurous acid ammonium salt lean solution pH value is 5.5~6.5, preferably pH value 6.1.
Further, the flue-gas temperature of desulfurizing tower is 30~65 DEG C in the step 2, and pressure is -5~5kPaG.Preferably
The flue-gas temperature of desulfurizing tower is 45 DEG C in the step 2, pressure 3kPaG.
Further, total salt in the sulfurous acid ammonium salt lean solution or sulfurous acid ammonium salt rich solution of the step 1 and step 2 (including
Ammonium sulfite and ammonium bisulfite) concentration be 15~43%wt.Further, according to SO in flue gas in the step 32And NH3It is miscellaneous
Matter content determines that cleaning solution is alkaline aqueous solution and/or acidic aqueous solution.
Further, content of sulfur dioxide is 2~15%vol in the step 4 high temperature sulfur dioxide flue gas, preferably
6%vol, high-temperature flue gas temperature after waste heat boiler heat exchange cooling is 200~450 DEG C, preferably 350 DEG C.
Further, using SO in circulating cooling water washing flue gas removing flue gas in the step 53, generate diluted acid send to
Oxidation trough.Cooling tower flue-gas temperature is 60~90 DEG C, preferably 75 DEG C.
Further, the step 6 sulfite ammonium rich solution generates ammonium sulfate through dioxygen oxidation, and is arranged in oxidation trough
Cobaltous sulfate fixed bed catalyst improves ammonium sulfite and converts ammonium sulfate efficiency；Ammonium sulfate liquor is sent to ammonium sulfate device and extracts sulphur ammonium,
Raffinate returns to oxidation trough after extracting sulphur ammonium, and the operating pressure of oxidation trough is 0~0.5MPaG, preferably 0.2MPaG.
A kind of coke-stove gas sulfurous acid ammonium salt process deamination production thiamine process principle of the utility model is as follows:
Ammonium sulfite salting liquid is mainly by ammonium sulfite (NH4)2SO3, ammonium bisulfite NH4HSO3With a small amount of sulphur ammonium (NH4)2SO4Composition, solution is in acidity, because three kinds of salt constituent content different PHs also change therewith.Sulfurous acid ammonium salt lean solution
NH4HSO3/(NH4)2SO3Concentration proportion is higher, pH value is lower, strong to the absorption driving force of ammonia；Conversely, rich solution NH4HSO3/
(NH4)2SO3Concentration proportion is lower, pH value is higher, strong to the absorption driving force of sulfur dioxide.Ammonium sulfite salting liquid is in coal gas
The absorption process of ammonia cooperates with coupled system with the absorption process formation to sulfur dioxide in flue gas；The sulfurous acid that absorption process generates
Ammonium salt is converted into sulphur ammonium through peroxidating, is discharged from system.
Main chemical reactions are as follows:
Coal gas washes ammonia: NH4HSO3+NH3=(NH4)2SO3
H2SO4+2NH3=(NH4)2SO4
Flue gas desulfurization: (NH4)2SO3+SO2+H2O=2NH4HSO3
Salt oxidation: 2 (NH4)2SO3+O2=2 (NH4)2SO4
NH4HSO3+NH3+0.5O2=(NH4)2SO4
The utility model coke-stove gas sulfurous acid ammonium salt process deamination production sulphur ammonium system structure is scientific, reasonable, with existing skill
Art, which compares, to be had the advantage that
1) the utility model is with the sulphur slurry or absorption process of ammonia and the generation of coal gas ammonia process Wet-type oxidation sweetening in coke-stove gas
The sour vapour that desulfurization generates, which is burned, generates sulfur dioxide as raw material, produces sulphur ammonium by the manufacturing technique method of the utility model and produces
Product solve sulfuric acid and wash ammonia process equipment seriously corroded instead of with the complicated acid-making process of sulphur slurry or sour vapour production sulfuric acid
Problem.
2) the utility model cooling water absorbs three oxidations micro in high temperature sulfur dioxide flue gas while cooled flue gas
Sulphur generates sulfuric acid, can substitute the sulfuric acid of required outsourcing when production sulphur ammonium, and resource is comprehensively utilized.
3) the utility model process flow is simple, with low investment, low energy consumption, convenient for being widely popularized.
It should be appreciated that term and term used herein are used to describe, rather than limitation.Therefore, based on well known
Content, the technical staff in this neighborhood are understood that these concepts, design other structures, method and system, easily with complete
At several purposes of the utility model.It is important that it is considered that claims include equivalent constructions, without departing from this
The spirit and scope of utility model.
Detailed description of the invention
Fig. 1 is that the utility model coke-stove gas sulfurous acid ammonium salt process deamination produces sulphur ammonium system diagram.
Wherein appended drawing reference are as follows:
1- combustion furnace；2- waste heat boiler；3- cooling tower；4- desulfurizing tower；5- Ammonic washing tower；6- oxidation trough；7- cooling water pump；8-
Desulfurization upper section circulating pump；9- desulfurization lower section circulating pump；10- ammonium sulfate solution circulating pump；11- washes ammonia recycle liquid pump；12- desulfurizing tower is cold
But device
Specific embodiment
The present invention will be further described with reference to embodiments:
Embodiment 1
Present embodiment discloses a kind of coke-stove gas sulfurous acid ammonium salt process deaminations to produce sulphur ammonium system, structure such as Fig. 1 institute
Show, including combustion furnace 1, waste heat boiler 2, cooling tower 3, desulfurizing tower 4, Ammonic washing tower 5, oxidation trough 6, cooling water pump 7, desulfurization upper section follow
Ring pump 8, ammonium sulfate solution circulating pump 10, washes ammonia recycle liquid pump 11, desulfurizing tower cooler 12 at desulfurization lower section circulating pump 9:
The desulfurizing tower 4 is multistage packed tower.
Cobaltous sulfate fixed bed catalyst is arranged in micropore air distribution pipe built in the oxidation trough 6.
The sulphur slurry or sour vapor pipeline, fuel gas pipeline and air pipe line are connect with 1 entrance of combustion furnace, and burning, which generates, contains dioxy
Change the flue gas of sulphur；
1 exhanst gas outlet of combustion furnace is connect with 2 smoke inlet of waste heat boiler, 2 exhanst gas outlet of waste heat boiler with it is cold
But 3 smoke inlet of tower connects, and 3 exhanst gas outlet of cooling tower is connect with 4 smoke inlet of desulfurizing tower, and 4 tail gas of desulfurizing tower goes out
The logical atmosphere of mouth；
The coke-stove gas is connect with 5 gas entry of Ammonic washing tower, and 5 gas exit of Ammonic washing tower is set with the processing of subsequent coal gas
Apply connection；
5 rich solution outlet of Ammonic washing tower is washed ammonia recycle liquid pump 11 and is washed respectively with 5 lean solution entrance of Ammonic washing tower, desulfurizing tower 4
Each section of rich solution entrance, the connection of 6 rich solution entrance of oxidation trough；
4 bottom lean solution of the desulfurizing tower outlet is cold with 4 lean solution entrance of Ammonic washing tower, desulfurizing tower respectively through desulfurization lower section circulating pump 9
But 12 solution inlet of device connects；12 taphole of desulfurizing tower cooler washs lower section solution inlet with desulfurizing tower 4 and connect；
The desulfurizing tower 4 washs upper section taphole and washs upper section rich solution entrance through desulfurization upper section circulating pump 8 and desulfurizing tower
Connection；
The cleaning solution is connect with 4 clean-up stage cleaning solution entrance of desulfurizing tower, desulfurizing tower clean-up stage cleaning solution outlet with
The connection of cleaning solution treatment facility；
The 3 tower bottom cooling water outlet of cooling tower connect respectively with 3 cooling water inlet of cooling tower through cooling water pump 7, aoxidizes
The connection of 6 cooling water inlet of slot；
The oxygen-containing gas pipeline is connect with 6 gas access of oxidation trough, and 6 ammonium sulfate solution of the oxidation trough outlet is molten through sulphur ammonium
Liquid circulating pump 10 is connect with sulphur ammonium evaporative crystallization facility.
Realize that coke-stove gas sulfurous acid ammonium salt process deamination produces thiamine process using above system, comprising the following steps:
The sulfurous acid ammonium salt lean solution adverse current of step 1, coal gas in Ammonic washing tower 5 from bottom to top with the sprinkling of 5 tower top of Ammonic washing tower connects
Touching, ammonia therein are absorbed, and ammonia is reacted with ammonium bisulfite generates ammonium sulfite, form sulfurous acid ammonium salt in 5 tower bottom of Ammonic washing tower
Rich solution；
The ammonium sulfite that step 2, sulfur dioxide flue gas are sprayed with 4 tower top of desulfurizing tower from bottom to top in 4 washing section of desulfurizing tower
Salt rich solution counter current contacting, sulfur dioxide therein are absorbed, and sulfur dioxide is reacted with ammonium sulfite generates ammonium bisulfite, make Asia
Ammonium sulfate rich solution is regenerated as ammonium sulfite lean solution；
4 washing section of desulfurizing tower is that single hop or multisection type absorb, each section of independent loops, and the ammonium sulfite salting liquid in each section
Middle SO3 =Ion concentration is different, and each section is in increasing concen-trations trend from top to bottom；
Step 3 further washs flue gas with cleaning solution in 4 clean-up stage of desulfurizing tower, absorbs remaining sulfur dioxide in flue gas
And/or the impurity such as ammonia；
Step 4, sulphur slurry or sour vapour burn in combustion furnace 1 and generate high temperature sulfur dioxide flue gas, high temperature sulfur dioxide flue gas
Enter cooling tower 3 after the heat exchange cooling of waste heat boiler 2；
Step 5, high temperature sulfur dioxide flue gas further cool down in cooling tower 3 through cool water shower, and cooling water is in cooling
Sulfur trioxide micro in high temperature sulfur dioxide flue gas is absorbed while flue gas generates sulfuric acid；Cooling obtained sulfur dioxide flue gas
It send to desulfurizing tower；
The part of sulfuric acid water of step 6, the part sulfurous acid ammonium salt rich solution at 5 bottom of Ammonic washing tower and cooling tower 3 enters oxidation trough 6,
Oxygen-containing gas is blasted in oxidation trough 6 and/or cobaltous sulfate is added and makees catalyst, and sulfurous acid ammonium salt is oxidized to sulphur ammonium.
The sulphur slurry is the intermediate products that coal gas removing hydrogen sulfide generates, to contain sulphur and/or ATS (Ammonium thiosulphate) and sulphur
The material of ammonium cyanate.
The acid vapour is the gas containing hydrogen sulfide, hydrogen cyanide, carbon dioxide and vapor that absorption process desulfurization desorption generates
Body.
The ammonium sulfite salting liquid is the mixed liquor of ammonium sulfite and ammonium bisulfite.
Ammonic washing tower 5 is using ammonia in ammonium sulfite solution removing coal gas in the step 1.Ammonic washing tower bottom sulfurous acid ammonium salt rich solution
PH value is 5.8~6.8.
Gas temperature in the step 1 in Ammonic washing tower is 23~55 DEG C, and pressure is -5~30kPaG.
Desulfurizing tower 4 absorbs SO in flue gas using the ammonium sulfite rich solution that 5 tower bottom of Ammonic washing tower is formed in the step 22, dioxy
Change sulphur and react generation ammonium bisulfite with ammonium sulfite, is regenerated sulfurous acid ammonium salt rich solution for ammonium sulfite lean solution.It is described
Desulfurizing tower bottom sulfurous acid ammonium salt lean solution pH value is 5.5~6.5.
The flue-gas temperature of desulfurizing tower 4 is 30~65 DEG C in the step 2, and pressure is -5~5kPaG.
Total salt concentration is 15~43% in the sulfurous acid ammonium salt lean solution and sulfurous acid ammonium salt rich solution of the step 1 and step 2
wt。
According to SO in flue gas in the step 32And NH3Impurity content determines that cleaning solution is alkaline aqueous solution and/or acid water
Solution.As SO in flue gas2Concentration is more than 50mg/m3When, using alkaline aqueous solution.As NH in flue gas3Concentration is more than 15mg/m3When,
Using acidic aqueous solution.
Content of sulfur dioxide is 2~15%vol in the step 4 high temperature sulfur dioxide flue gas, and high-temperature flue gas is through waste heat
Temperature is 200~450 DEG C after boiler heat exchange cooling.
Using SO in circulating cooling water washing flue gas removing flue gas in the step 53, generate diluted acid and send to oxidation trough.It is cold
But flue-gas temperature is 60~90 DEG C in tower.
The step 6 sulfite ammonium rich solution generates ammonium sulfate through dioxygen oxidation, or adds cobaltous sulfate in oxidation trough and do
Catalyst improves ammonium sulfite and converts ammonium sulfate efficiency；By ammonium sulfate liquor send to ammonium sulfate device extract sulphur ammonium, extract sulphur ammonium after it is residual
Liquid returns to oxidation trough, and the operating pressure of oxidation trough is 0~0.5MPaG.
Embodiment 2:
Present embodiment discloses a kind of coke-stove gas sulfurous acid ammonium salt process deaminations to produce thiamine process, using 1 institute of embodiment
State coke-stove gas sulfurous acid ammonium salt process deamination production sulphur ammonium system.
1100000 tons of coke-oven plant coal gas treating capacity 55000m3/ h, 6g/m containing ammonia in coal gas3, sulfide hydrogen 4g/m3.Coal gas is de-
Hydrogen sulfide uses vacuum carbonate desulfurization technology, and carbonate sulfur removing pregnant solution generates hydrogen sulfide containing sour vapour through vacuum desorption.
Coal gas in Ammonic washing tower inhaled from bottom to top by the sulfurous acid ammonium salt lean solution counter current contacting with tower top sprinkling, ammonia therein
It receives, ammonia is reacted with ammonium bisulfite generates ammonium sulfite, forms sulfurous acid ammonium salt rich solution in tower bottom；Ammonic washing tower operation temperature 30
DEG C, pressure 20kPa；Sulfurous acid ammonium salt rich solution pH value is 6.5.
Sour vapour containing hydrogen sulfide burns in combustion furnace generates high temperature sulfur dioxide flue gas, sulfur dioxide in flue gas concentration
10%vol, high-temperature flue gas enter cooling tower after waste heat boiler heat exchange is cooled to 330 DEG C；Sulfur dioxide flue gas is in cooling tower
65 DEG C are cooled further to through cool water shower, it is raw that cooling water absorbs sulfur trioxide micro in flue gas while cooled flue gas
At sulfuric acid；The sulfurous acid ammonium salt rich solution counter current contacting that sulfur dioxide flue gas is sprayed with tower top from bottom to top in desulfurizing tower washing section,
Sulfur dioxide therein is absorbed, and sulfur dioxide is reacted with ammonium sulfite generates ammonium bisulfite, obtains sulfurous acid ammonium salt rich solution
To be regenerated as lean solution, sulfurous acid ammonium salt lean solution pH value is 6.0；55 DEG C of desulfurizing tower operation temperature, pressure -2kPa.Desulfurizing tower washing
Section is that multisection type absorbs, SO in each section of independent loops and sulfurous acid solution3 =Ion concentration is different, and each section is in concentration from top to bottom
Increasing trend.Flue gas is further washed with distilled ammonia wastewater in desulfurizing tower clean-up stage, it is miscellaneous to absorb remaining sulfur dioxide etc. in flue gas
Matter；
The part sulfurous acid ammonium salt rich solution at Ammonic washing tower bottom and the partially acidic cooling water of cooling tower enter oxidation trough, oxidation trough
In blast air, and cobaltous sulfate is added and makees catalyst, sulfurous acid ammonium salt is oxidized to sulphur ammonium.Oxidation trough uses atmospheric operation, behaviour
Make temperature 70 C.
Embodiment 3:
Present embodiment discloses a kind of coke-stove gas sulfurous acid ammonium salt process deaminations to produce thiamine process, using 1 institute of embodiment
State coke-stove gas sulfurous acid ammonium salt process deamination production sulphur ammonium system.
1100000 tons of coke-oven plant coal gas treating capacity 55000m3/ h, 7g/m containing ammonia in coal gas3, sulfide hydrogen 5g/m3.Coal gas is de-
Hydrogen sulfide uses ammonia process Wet Oxidation Process, and the hydrogen sulfide removed from coal gas is converted into sulphur slurry.
Coal gas in Ammonic washing tower inhaled from bottom to top by the sulfurous acid ammonium salt lean solution counter current contacting with tower top sprinkling, ammonia therein
It receives, ammonia is reacted with ammonium bisulfite generates ammonium sulfite, forms sulfurous acid ammonium salt rich solution in tower bottom；Ammonic washing tower operation temperature 30
DEG C, pressure 20kPa；Sulfurous acid ammonium salt rich solution pH value is 6.5.
Sulphur containing sulphur, ATS (Ammonium thiosulphate) and ammonium thiocyanate, which is starched to burn in combustion furnace, generates high temperature sulfur dioxide cigarette
Gas, SO in flue gas2Concentration 4%vol, high-temperature flue gas enter cooling tower after waste heat boiler heat exchange is cooled to 300 DEG C；Sulfur dioxide
Flue gas is cooled further to 65 DEG C through cool water shower in cooling tower, and cooling water absorbs micro- in flue gas while cooled flue gas
The sulfur trioxide of amount generates sulfuric acid；The sulfurous acid ammonium salt that sulfur dioxide flue gas is sprayed with tower top from bottom to top in desulfurizing tower washing section
Rich solution counter current contacting, sulfur dioxide therein are absorbed, and sulfur dioxide is reacted with ammonium sulfite generates ammonium bisulfite, make sulfurous
Acid ammonium salt rich solution is regenerated as lean solution, and sulfurous acid ammonium salt lean solution pH value is 6.1.
55 DEG C of desulfurizing tower operation temperature, pressure 2kPa.Desulfurizing tower washing section is unistage type absorption.It is used in desulfurizing tower clean-up stage
Distilled ammonia wastewater further washs flue gas, absorbs the impurity such as remaining sulfur dioxide in flue gas；
The part sulfurous acid ammonium salt rich solution at Ammonic washing tower bottom and the partially acidic cooling water of cooling tower enter oxidation trough, oxidation trough
In blast air, sulfurous acid ammonium salt is oxidized to sulphur ammonium.Oxidation trough uses pressurized operation, operating pressure 0.3MPaG, operation temperature
80℃。
Embodiment 4:
Present embodiment discloses a kind of coke-stove gas sulfurous acid ammonium salt process deaminations to produce thiamine process, using 1 institute of embodiment
State coke-stove gas sulfurous acid ammonium salt process deamination production sulphur ammonium system.
1100000 tons of coke-oven plant coal gas treating capacity 55000m3/ h, 6g/m containing ammonia in coal gas3, sulfide hydrogen 6g/m3.Coal gas is de-
Hydrogen sulfide uses ammonia process Wet Oxidation Process, and the hydrogen sulfide removed from coal gas is converted into sulphur slurry.
Coal gas in Ammonic washing tower inhaled from bottom to top by the sulfurous acid ammonium salt lean solution counter current contacting with tower top sprinkling, ammonia therein
It receives, ammonia is reacted with ammonium bisulfite generates ammonium sulfite, forms sulfurous acid ammonium salt rich solution in tower bottom；Ammonic washing tower operation temperature 30
DEG C, pressure 20kPa；Sulfurous acid ammonium salt rich solution pH value is 6.5.
Sulphur containing sulphur, ATS (Ammonium thiosulphate) and ammonium thiocyanate, which is starched to burn in combustion furnace, generates high temperature sulfur dioxide cigarette
Gas, SO in flue gas2Concentration 10%vol, high-temperature flue gas enter cooling tower after waste heat boiler heat exchange is cooled to 330 DEG C；Titanium dioxide
Sulphur flue gas is cooled further to 65 DEG C through cool water shower in cooling tower, and cooling water absorbs in flue gas while cooled flue gas
Micro sulfur trioxide generates sulfuric acid；The ammonium sulfite that sulfur dioxide flue gas is sprayed with tower top from bottom to top in desulfurizing tower washing section
Salt rich solution counter current contacting, sulfur dioxide therein are absorbed, and sulfur dioxide is reacted with ammonium sulfite generates ammonium bisulfite, make Asia
Ammonium sulfate rich solution is regenerated as lean solution, and sulfurous acid ammonium salt lean solution pH value is 5.9；55 DEG C of desulfurizing tower operation temperature, pressure-
2kPa.Desulfurizing tower washing section is multisection type absorption, SO in each section of independent loops and sulfurous acid solution3 =Ion concentration is different, from upper
And lower each section is in increasing concen-trations trend.Flue gas is further washed with distilled ammonia wastewater in desulfurizing tower clean-up stage, absorbs and is remained in flue gas
The impurity such as sulfur dioxide；
Suitable sulfuric acid is filled into the acid cooling water of cooling tower discharge, is passed to Ammonic washing tower upper section washing coal gas, into
Ammonia in one-step removal coal gas.
The part sulfurous acid ammonium salt rich solution at Ammonic washing tower bottom enters oxidation trough, air is blasted in oxidation trough, and cobaltous sulfate is added
Catalyst is made, sulfurous acid ammonium salt is oxidized to sulphur ammonium.Oxidation trough use atmospheric operation, 70 DEG C of operation temperature.
Finally, it should be noted that the above various embodiments is only to illustrate the technical solution of the utility model, rather than it is limited
System；Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should
Understand: it is still possible to modify the technical solutions described in the foregoing embodiments, or to some or all of
Technical characteristic is equivalently replaced；And these are modified or replaceed, it does not separate the essence of the corresponding technical solution, and this is practical new
The range of each embodiment technical solution of type.
Claims (1)
1. a kind of coke-stove gas sulfurous acid ammonium salt process deamination produces sulphur ammonium system, which is characterized in that including combustion furnace, waste heat boiler
Furnace, cooling tower, desulfurizing tower, Ammonic washing tower, oxidation trough, cooling water pump, desulfurization upper section circulating pump, desulfurization lower section circulating pump, sulphur ammonium are molten
Liquid circulating pump washes ammonia recycle liquid pump and desulfurizing tower cooler:
Sulphur slurry or sour vapor pipeline, fuel gas pipeline and air pipe line are connect with combustion furnace entrance；
The combustion furnace exhanst gas outlet is connect with waste heat boiler smoke inlet, the waste heat boiler exhanst gas outlet and cooling tower flue gas
Entrance connection, the cooling tower exhanst gas outlet are connect with desulfurizing tower smoke inlet, and the desulfurizing tower offgas outlet leads to atmosphere；
The coke-stove gas is connect with Ammonic washing tower gas entry, and the Ammonic washing tower gas exit and subsequent coal gas treatment facility connect
It connects；
The Ammonic washing tower rich solution outlet, which is washed ammonia recycle liquid pump and washs each section of rich solution with Ammonic washing tower lean solution entrance, desulfurizing tower respectively, to be entered
Mouth, the connection of oxidation trough rich solution entrance；
The desulfurizing tower bottom lean solution outlet through desulfurization lower section circulating pump respectively with Ammonic washing tower lean solution entrance, desulfurizing tower cooler solution
Entrance connection；The desulfurizing tower cooler taphole is connect with desulfurizing tower washing lower section solution inlet；
The desulfurizing tower washing upper section taphole is connect through desulfurization upper section circulating pump with desulfurizing tower washing upper section rich solution entrance；
Cleaning solution is connect with desulfurizing tower clean-up stage cleaning solution entrance, and the desulfurizing tower clean-up stage cleaning solution outlet is handled with cleaning solution
Facility connection；
Cooling tower bottom cooling water outlet connect with cooling tower cooling water inlet respectively through cooling water pump, oxidation trough cooling water
Entrance connection；
Oxygen-containing gas pipeline is connect with oxidation trough gas access, oxidation trough ammonium sulfate solution outlet through ammonium sulfate solution circulating pump with
The connection of sulphur ammonium evaporative crystallization facility；
Cobaltous sulfate fixed bed catalyst is set in the oxidation trough.
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|---|---|---|---|
| CN201920026114.1U CN209702677U (en) | 2019-01-08 | 2019-01-08 | Coke-stove gas sulfurous acid ammonium salt process deamination produces sulphur ammonium system |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109517630A (en) * | 2019-01-08 | 2019-03-26 | 大连市昊通环保工程技术有限公司 | Coke-stove gas sulfurous acid ammonium salt process deamination produces thiamine process and system |
| CN112624154A (en) * | 2020-12-30 | 2021-04-09 | 中冶焦耐(大连)工程技术有限公司 | Process method for combining gas deamination with desulfurization waste liquid and sulfur treatment |
-
2019
- 2019-01-08 CN CN201920026114.1U patent/CN209702677U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109517630A (en) * | 2019-01-08 | 2019-03-26 | 大连市昊通环保工程技术有限公司 | Coke-stove gas sulfurous acid ammonium salt process deamination produces thiamine process and system |
| CN109517630B (en) * | 2019-01-08 | 2024-06-11 | 大连昊通节能环保工程技术有限公司 | Process and system for deamination production of ammonium sulfate by coke oven gas ammonium sulfite method |
| CN112624154A (en) * | 2020-12-30 | 2021-04-09 | 中冶焦耐(大连)工程技术有限公司 | Process method for combining gas deamination with desulfurization waste liquid and sulfur treatment |
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Address after: 116000 101-b1, 1f, front building, No. 909c, Huangpu Road, high tech Industrial Park, Dalian, Liaoning Patentee after: Dalian Haotong energy conservation and Environmental Protection Engineering Technology Co.,Ltd. Address before: 116000 No. 2, floor 3, unit 3, No. 126, high energy street, high tech Industrial Park, Dalian, Liaoning Province Patentee before: DALIAN HAOTONG ENVIRONMENTAL PROTECTION ENGINEERING TECHNOLOGY Co.,Ltd. |