CN109882864A - A kind of technique and system of the coproduction relieving haperacidity of dangerous waste incineration disposal - Google Patents
A kind of technique and system of the coproduction relieving haperacidity of dangerous waste incineration disposal Download PDFInfo
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- CN109882864A CN109882864A CN201910224494.4A CN201910224494A CN109882864A CN 109882864 A CN109882864 A CN 109882864A CN 201910224494 A CN201910224494 A CN 201910224494A CN 109882864 A CN109882864 A CN 109882864A
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- sulfur
- dangerous waste
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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
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E20/00—Combustion technologies with mitigation potential
- Y02E20/12—Heat utilisation in combustion or incineration of waste
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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
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P20/00—Technologies relating to chemical industry
- Y02P20/10—Process efficiency
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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
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P20/00—Technologies relating to chemical industry
- Y02P20/10—Process efficiency
- Y02P20/129—Energy recovery, e.g. by cogeneration, H2recovery or pressure recovery turbines
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Abstract
The present invention relates to the techniques and system of a kind of dangerous waste incineration disposal coproduction relieving haperacidity, utilize dangerous waste rotary kiln incineration disposing technique, relieving haperacidity double conversion double absorption technique is burned in conjunction with sulphur, design the process flow and system of a kind of dangerous waste incineration disposal coproduction relieving haperacidity, it is high to compensate for existing dangerous waste incineration disposal distributors waste gas from incinerator treatment cost, manage the single defect of product, dangerous waste incineration disposal exhaust gas is efficiently used simultaneously, it realizes dangerous waste rotary kiln incineration disposal plant and sulphur burns the combination of sulphuric acid plant, promotion company recycling economy development, improve comprehensive resource utilization rate, realize that dangerous waste disposes industry value chain.
Description
Technical field
The invention belongs to chemical technology fields, are related to hazardous waste improvement and sulfuric acid process industry field, specially a kind of
The technique and system of dangerous waste incineration disposal coproduction relieving haperacidity.
Background technique
For the current hazardous Waste Incineration in China and recycling status, in conjunction in the world in hazardous waste processing and money
State-of-the-art technology in terms of sourceization, at this stage, hazardous waste rotary kiln incineration disposing technique include waste pretreatment system, burn system
Three parts such as system and smoke processing system.Waste pretreatment system includes the pretreatment and feed process of waste；Incineration system
It is made of rotary kiln and dual firing chamber, slag-tapping system and control system；Smoke processing system is recycled by waste heat, chilling+semidry method takes off
Acid, cleaner, wet process depickling and flue gas reheat system composition.
There are grate furnace, liquid injection formula incinerator, fluidized combustion for the main type of furnace of dangerous waste incineration both at home and abroad
Furnace, multi-compartment bed incinerator, pyrogenation incinerator and Rotation error etc..In addition at the microwave to get up there are also external newly-developed
The technologies such as reason, moise-heat sterilization, corona treatment, dry type kiln because structure is simple, to hazardous waste it is adaptable,
The advantages that control is stablized, operation is easy, technology maturation, long history run is widely used in the world.Some Domestic rotary kiln
Equipment manufacturer (such as Beijing Enviro-Associated Technology Ltd., Tsinghua Tongfang Environment Co., Ltd) has into
Ripe manufacturing technology, indices and requirement are able to satisfy current standard requirement, and technical level is set close to world level, therefore originally
Meter selects fair current dry ash formula Rotation error in the same direction, i.e., the direction of material movement flows to identical with kiln gas in kiln body, solid, half
Solid waste, Molten sulphur torch firing and combustion-supporting air enter from the head of cylinder, the flue gas of generation of burning, sulfur dioxide and
Residue is discharged by tail portion, and flue gas and sulfur dioxide are further incorporated into dual firing chamber's burning.
Dual firing chamber export kiln gas working condition it is severe, high temperature, containing condensing under acid gas, high temperature situations such as, cannot use
Bag-type dust, by the unremitting effort of many years, by original design, selection improves dual firing chamber's outlet dedusting special-purpose electrostatic and removes
Dirt device, it is ensured that the long period steady running of electrostatic precipitation.
A kind of system of dangerous waste incineration disposal coproduction relieving haperacidity, belongs to chemical technology field, is related to hazardous waste improvement and sulphur
Dangerous waste rotary kiln incineration disposal plant and sulphur are burned the combination of sulphuric acid plant by sour process industry, in disposition dangerous waste
Co-producing sulfuric acid and sulfate derivative simultaneously enrich dangerous waste incineration disposal distributors product structure, improve device comprehensive utilization ratio,
Realize that dangerous waste disposes industry value chain.
Acid-making process process (Fig. 2) comparison is burned to dangerous waste incineration disposal process flow (Fig. 1) and sulphur, it is contemplated that dangerous
The factors such as waste type is more, complicated component, quantity are relatively fewer, and source variation is unstable, therefore, the process flow of design will examine
The complexity and variability for considering hazardous waste, take into account versatility, the principle of broad spectrum activity, design a kind of dangerous waste incineration disposal coproduction system
The technique and system (Fig. 3) of acid.
Summary of the invention
It is an object of the invention to improve dangerous waste incineration disposal distributors product structure, a kind of dangerous waste incineration disposal is provided
The technique and system of coproduction relieving haperacidity.Sulfuric acid, sulfur dioxide liquid, three oxidations can not only be produced during dangerous waste incineration disposal
Sulphur, 65% oleum, 25% oleum discharge products, the present invention such as producing ammonium sulfate byproduct, sodium sulphate in waste gas pollution control and treatment and compensate for
Dangerous waste incineration disposal distributors product structure is single, improves the dangerous waste incineration disposal distributors market competitiveness.
To achieve the above object, The technical solution adopted by the invention is as follows:
A kind of technique of dangerous waste incineration disposal coproduction relieving haperacidity, which comprises the steps of:
(1) solid sulfur is sent into sulfur melting groove by belt conveyor, in the sulfur melting groove equipped with steam coil using 0.3~
Solid sulfur is fused into molten sulfur by the steam of 0.4Mpa pressure, and the molten sulfur that underground tank is temporarily stored in sulfur melting groove is squeezed into submerged pump
Big tank is stored, stores big tank molten sulfur temperature control between 135-145 DEG C；
(2) molten sulfur is stored into the molten sulfur in big tank using canned motor pump and is sent into rotary kiln end sulphur spray gun, sprayed using Molten sulphur
Molten sulfur injection is nebulized and is burned by burning technology, obtains SO2Gas maintains rotary kiln dual firing chamber outlet sulfur dioxide concentration
Between 9.5%-10.5%；
(3) dual firing chamber's temperature control at 1100 DEG C -1130 DEG C, residence time 2.316s, outlet kiln gas by waste heat boiler into
Row is cooled to 415 ± 2 DEG C, and waste heat recycling is used to produce saturated vapor and power generation；
(4) kiln gas after cooling down is gathered dust only using gravitational dust collection, furnace gas filter-electrostatic precipitator, high-voltage electrostatic dust separator
Change, is dry, into conversion system, producing pure S03；
(5) it after hazardous waste is using smp system pretreatment compatibility, is disposed into rotary kiln incineration；
(6) by the SO in step (4)3Gas produces sulfuric acid finally by absorption tower.
Molten sulfur delivery temperature is kept between 135-145 DEG C, with, with goods and materials acid in molten sulfur, molten sulfur, which filters, to be made in quick lime
0.1~1.0 micron of dregs are removed with tripoli filter aid.
Rotary kiln selects fair current dry ash formula Rotation error in the same direction, and operation temperature should be controlled in 850 DEG C or so hydrojet sulphur,
Maximum temperature is less than 1150 DEG C, SO2The concentration of gas is 9.8%.
Waste heat recycling is used to produce saturated vapor and power generation.
SO2Conversion system using more advanced double conversion double absorption production procedure in the world, conversion oxygen sulphur ratio not less than 0.8~
0.9。
Incinerating waste material is sulfur-containing compound and inorganic compound, and the moisture content after pre-processing compatibility gives up between 0.87-4%
Object chloride content is less than 0.8%, and less than 0.1%, carbon-sulfur ratio is controlled 3~5 total fluorine content.
A kind of system of dangerous waste incineration disposal coproduction relieving haperacidity, it is characterised in that: including sequentially connected sulfur melting groove, thick sulphur
Slot, pre- painted groove, molten sulfur underground tank, molten sulfur storage tank, fair current dry ash formula Rotation error, dual firing chamber, dirt pocket, kiln gas filtering
Device-electrostatic precipitator, high-voltage electrostatic dust separator, waste heat boiler, converter, heat exchanger, the first and second absorption tower (containing mist eliminator).
Using the present invention has the advantages that
Hazardous waste can not only be handled in dangerous waste incineration disposal coproduction acid manufacturing processes, moreover it is possible to produce sulfuric acid, sulfur dioxide liquid,
Sulfur trioxide, 65% oleum, 25% oleum, discharge the products such as producing ammonium sulfate byproduct, sodium sulphate in waste gas pollution control and treatment, and waste heat returns
Midwifery producing steam and power generation, it is single that the present invention compensates for dangerous waste incineration disposal distributors product structure, improves at dangerous waste burning
Set distributors' market competitiveness.
Detailed description of the invention
Scheming (3) is process flow chart of the invention: dangerous waste incineration disposal coproduction acid-making process flow chart.
Scheme (1) dangerous waste incineration disposal process flow chart.
Scheme (2) sulphur and burns acid-making process flow chart.
Scheme (4) rotary kiln and dual firing chamber and waste heat boiler structural schematic diagram.
Specific embodiment
Solid sulfur is transported to Rong Liu workshop section out of library, sulfur melting slot fusing, molten sulfur are sent by belt conveyor
It is settled through thick sulphur slot, overflow enters pre- painted groove.Filter is got to pump from pre- painted groove to be filtered.Molten sulfur is cleaned after filtering to send
Enter molten sulfur underground tank, then is stored with pumping basin.
Molten sulphur post sent by submerged pump and is temporarily stored in the molten sulfur of underground tank and squeezes into the big tank of storage, is then pumped by shielding
Enter sulfur furnace, the oxygen to be formed in the misty dry air sent with dry suction post is sprayed by sulphur rifle and reacts generation sulfur dioxide
Kiln gas.
Hazardous waste storage, compatibility, pretreatment system.
Compatibility: solid material and semisolid material enter the loose unpacked material bunker of incineration plants front end after metering identification.
One of them is used as mixing bunker as smallclothes solid material bunker, one, and one is used as big part waste bunker.Waste is by grabbing
Bucket in mixing bunker hybrid combination, it is more uniform after again feeding enter furnace burning.
Broken: big lump waste materials are first crushed after marching into the arena.When system is run, use grab bucket by big part waste or barreled first
Object is grabbed to the feed hopper of crushing system, and when crusher is run, under the powerful shearing force of cutter tooth, big lump waste materials are broken into rapidly
Partial size is in 100mm particle below.Broken material enters mixing material pit by blanking device.
Charging: viscous semisolid waste is sent into waste mixing hole after being mixed with uniformly using wood sawdust etc.；Solid waste
Bulk solid waste is directly discharged into bulk cargo hole by transport vehicle, larger part solid waste is stored in larger part material hole.
Hopper first order hermatic door, which is program controlled, to be automatically opened, and waste is fallen between I and II door, first order hermatic door
It is automatically closed, second level hermatic door, which is program controlled, to be automatically opened, and for waste by burning in pusher push-in rotary kiln, the second level is close
Closure door, which is program controlled, to be automatically closed, and a pusher process is completed.
Liquid waste squeezes into basin, sprays into incinerator through independent spray gun, to determine various waste liquids according to burning situation
Time of delivery and flow.
Hazardous waste is sent into rotary kiln ontology by feeding mechanism and carries out high temperature incineration, by 60min(45-75min)
The high temperature incineration of left and right, material are thoroughly burned into high-temperature flue gas and lime-ash, and the revolving speed of rotary kiln can be adjusted, and are kept about
The stabilization slag blanket of 50mm thickness can play the role of protecting flame retardant coating, and operation temperature should be controlled at 850 DEG C or so, high-temperature kiln gas from
Kiln tail enters dual firing chamber, and incineration residue enters water seal scraper slagging machine from kiln tail, enters ash cellar after water cooling, be periodically taken to stablize
Change/solidification workshop is handled.
Dual firing chamber's temperature control at 1100 DEG C -1130 DEG C, residence time 2.316s, inhibit kiln gas in dioxin and its
The synthesis of its harmful components.The control of kiln gas temperature is exported at 1050 DEG C, is sent into waste heat boiler, cool down 415 ± 2oC, removes through gravity
Dirt, kiln gas filter-electrostatic precipitator, high-voltage electrostatic dust separator dust cleaning, 98% sulfuric acid drying tower are dry.
Air is blasted drying tower by main blower, and the dry air that drying tower comes out sends rotary kiln sulfur furnace back to.Dual firing chamber comes
Kiln gas, waste heat boiler cool down 415 ± 2oC, enter one section of converter by kiln gas filter.One section of sulfur trioxide come out turns
Change furnace gas through secondary waste heat boiler (high temperature superheater) recycling in potential temperature waste heat cooling after enter two sections of converter, two sections come out
Enter three sections of converter after the sulfur dioxide furnace gas heat exchange that sulphur trioxide conversion furnace gas comes through the second heat exchanger and the first absorption tower,
After three sections of sulphur trioxide conversion furnace gases come out and the heat exchange of third heat exchanger, the first economizer is removed, the first absorption tower is then gone to inhale
Receive sulfur trioxide.The sulfur dioxide furnace gas come out by the first absorption tower, exchanges heat through third heat exchanger) ((pipe is outer), the second heat exchanger
(pipe is outer) enters four sections of converter after further exchanging heat.The sulphur trioxide conversion furnace gas come out by four sections passes through (low temperature superheater),
Again after two economizers further exchange heat cooling, second absorption tower is removed.
By main blower Lai humid air, moisture≤0.1g/Nm after drying tower is dry with 94-95% concentrated sulfuric acid sprinkle3's
Dry air removes Rotation error.The first time come out from reforming unit converts SO3Kiln gas, into the first absorption tower with 98%
Concentrated sulfuric acid sprinkle absorbs SO3, absorb SO3Go out in the kiln gas on the first absorption tower afterwards and still contains a small amount of SO2Gas enters back into conversion
Device is converted, the SO after second of conversion3Furnace gas enters second absorption tower and absorbs SO therein with 98% concentrated sulfuric acid sprinkle3Gas
The required finished product sulfuric acid of client is made in body, out the SO in second absorption tower gas2Sulphuric acid mist content≤45 %≤300PPM
㎎/Nm3, until tail gas absorption processing unit, further absorption processing.
Waste heat boiler recycling carrys out the pressure saturated vapor conveying into the high-temperature position waste heat generation 4.21MPa(256oC of dual firing chamber)
To low mistake.The low saturated vapor supply crossed recycling and to generate 3.82MPa, 336oC to the middle potential temperature waste heat of four sections of converter outlets
Exceed, exceeds recycling come the middle potential temperature waste heat to converter one section outlet and continue to heat the middle pressure saturated vapor from low mistake, produce
Raw 3.82MPa, 450oC superheated steam is used for the power generation of power generation workshop.Two economizer heating water are warming up to needed for waste heat boiler
Water temperature 219oC.
Claims (7)
1. a kind of technique of dangerous waste incineration disposal coproduction relieving haperacidity, which comprises the steps of:
(1) solid sulfur is sent into sulfur melting groove by belt conveyor, in the sulfur melting groove equipped with steam coil using 0.3~
Solid sulfur is fused into molten sulfur by the steam of 0.4Mpa pressure, and the molten sulfur that underground tank is temporarily stored in sulfur melting groove is squeezed into submerged pump
Big tank is stored, stores big tank molten sulfur temperature control between 135-145 DEG C；
(2) molten sulfur is stored into the molten sulfur in big tank using canned motor pump and is sent into rotary kiln end sulphur spray gun, sprayed using Molten sulphur
Molten sulfur injection is nebulized and is burned by burning technology, obtains SO2Gas maintains rotary kiln dual firing chamber outlet sulfur dioxide concentration
Between 9.5%-10.5%；
(3) dual firing chamber's temperature control at 1100 DEG C -1130 DEG C, residence time 2.316s, outlet kiln gas by waste heat boiler into
Row is cooled to 415 ± 2 DEG C, and waste heat recycling is used to produce saturated vapor and power generation；
(4) kiln gas after cooling down is gathered dust only using gravitational dust collection, furnace gas filter-electrostatic precipitator, high-voltage electrostatic dust separator
Change, is dry, into conversion system, producing pure S03；
(5) it after hazardous waste is using smp system pretreatment compatibility, is disposed into rotary kiln incineration；
(6) by the SO in step (4)3Gas produces sulfuric acid finally by absorption tower.
2. a kind of technique of dangerous waste incineration disposal coproduction relieving haperacidity as described in claim 1, it is characterised in that in the step (1)
Molten sulfur delivery temperature is kept between 135-145 DEG C, with acid goods and materials, molten sulfur are filtered and helped using tripoli in quick lime and in molten sulfur
Filtering agent removes 0.1~1.0 micron of dregs.
3. a kind of technique of dangerous waste incineration disposal coproduction relieving haperacidity as described in claim 1, it is characterised in that: the step (2)
Middle rotary kiln selects fair current dry ash formula Rotation error in the same direction, and operation temperature should be controlled in 850 DEG C or so hydrojet sulphur, the highest temperature
Degree is less than 1150 DEG C, SO2The concentration of gas is 9.8%, and conversion oxygen sulphur ratio is not less than 0.8~0.9.
4. the technique that a kind of dangerous waste as described in claim 1 burns coproduction relieving haperacidity, it is characterised in that: remaining in the step (3)
Recuperation of heat is used to produce saturated vapor and power generation.
5. a kind of technique of dangerous waste incineration disposal coproduction relieving haperacidity as described in claim 1, it is characterised in that: the step (4)
Middle SO2Conversion system is using double conversion double absorption production procedure more advanced in the world.
6. the technique that a kind of dangerous waste as described in claim 1 burns coproduction relieving haperacidity, it is characterised in that: burnt in the step (5)
Burning waste is sulfur-containing compound and inorganic compound, and the moisture content after pre-processing compatibility is between 0.87-4%, waste chloride content
Less than 0.8%, less than 0.1%, carbon-sulfur ratio is controlled 3~5 total fluorine content.
7. a kind of system of dangerous waste incineration disposal coproduction relieving haperacidity, it is characterised in that: including sequentially connected sulfur melting groove, thick sulphur slot,
Pre- painted groove, molten sulfur underground tank, molten sulfur storage tank, fair current dry ash formula Rotation error, dual firing chamber, dirt pocket, kiln gas filter-
Electrostatic precipitator, high-voltage electrostatic dust separator, waste heat boiler, converter, heat exchanger, the first and second absorption tower (containing mist eliminator).
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| CN110748895A (en) * | 2019-10-29 | 2020-02-04 | 中冶南方都市环保工程技术股份有限公司 | High-sulfur waste incineration treatment system and treatment method |
| CN110926227A (en) * | 2019-12-09 | 2020-03-27 | 阳新鹏富矿业有限公司 | Smelting furnace smoke dust collecting and treating method |
| CN111396897A (en) * | 2020-03-31 | 2020-07-10 | 镇江新宇固体废物处置有限公司 | Industrial hazardous waste incineration clean treatment system |
| CN115611240A (en) * | 2022-12-20 | 2023-01-17 | 张家口天龙科技发展有限公司 | Device and process method for preparing sulfur by purifying wet desulphurization byproducts |
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| CN110748895A (en) * | 2019-10-29 | 2020-02-04 | 中冶南方都市环保工程技术股份有限公司 | High-sulfur waste incineration treatment system and treatment method |
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| CN111396897A (en) * | 2020-03-31 | 2020-07-10 | 镇江新宇固体废物处置有限公司 | Industrial hazardous waste incineration clean treatment system |
| CN115611240A (en) * | 2022-12-20 | 2023-01-17 | 张家口天龙科技发展有限公司 | Device and process method for preparing sulfur by purifying wet desulphurization byproducts |
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