CN108190846A - One kind is suitable for sulphur coal oxygen-enriched combusting flue gas acid preparing technique - Google Patents
One kind is suitable for sulphur coal oxygen-enriched combusting flue gas acid preparing technique Download PDFInfo
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- CN108190846A CN108190846A CN201810083135.7A CN201810083135A CN108190846A CN 108190846 A CN108190846 A CN 108190846A CN 201810083135 A CN201810083135 A CN 201810083135A CN 108190846 A CN108190846 A CN 108190846A
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- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01B—NON-METALLIC ELEMENTS; COMPOUNDS THEREOF; METALLOIDS OR COMPOUNDS THEREOF NOT COVERED BY SUBCLASS C01C
- C01B17/00—Sulfur; Compounds thereof
- C01B17/69—Sulfur trioxide; Sulfuric acid
- C01B17/74—Preparation
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D50/00—Combinations of methods or devices for separating particles from gases or vapours
- B01D50/60—Combinations of devices covered by groups B01D46/00 and B01D47/00
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
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- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01B—NON-METALLIC ELEMENTS; COMPOUNDS THEREOF; METALLOIDS OR COMPOUNDS THEREOF NOT COVERED BY SUBCLASS C01C
- C01B13/00—Oxygen; Ozone; Oxides or hydroxides in general
- C01B13/02—Preparation of oxygen
- C01B13/0229—Purification or separation processes
- C01B13/0248—Physical processing only
- C01B13/0259—Physical processing only by adsorption on solids
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- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01B—NON-METALLIC ELEMENTS; COMPOUNDS THEREOF; METALLOIDS OR COMPOUNDS THEREOF NOT COVERED BY SUBCLASS C01C
- C01B2210/00—Purification or separation of specific gases
- C01B2210/0001—Separation or purification processing
- C01B2210/0009—Physical processing
- C01B2210/0014—Physical processing by adsorption in solids
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Abstract
The invention discloses one kind to be suitable for sulphur coal oxygen-enriched combusting flue gas acid preparing technique, including sequentially connected oxygen making set system, coal-burning boiler system, dust pelletizing system, cleaning system and acid making system, air enter after oxygen generation system obtained through pressure-variable adsorption it is oxygen-enriched, it is oxygen-enriched to be mixed into after coal-burning boiler system with the sulphur coal of admixture sulphur that adds in, then it burns in coal-burning boiler system, flue gas after oxygen-enriched and high sulfur coal combustion enters dust pelletizing system, flue gas after dust pelletizing system dedusting enters cleaning system, sulfuric acid is made into acid making system after the purification of the circulated sprinkling liquid in cleaning system in flue gas.It is provided by the present invention a kind of suitable for sulphur coal oxygen-enriched combusting flue gas acid preparing process makes full use sulphur coal, to greatest extent using resource, reduce the coal resource pressure in China；Oxygen-enriched combusting can reduce the amount of nitrogen in air, substantially reduce the smoke discharge amount after burning, reduce the cost of later stage smoke gas treatment.
Description
Technical field
The invention belongs to flue gas acid preparing technical fields, and in particular to one kind is suitable for sulphur coal oxygen-enriched combusting flue gas acid preparing work
Skill.
Background technology
China is consumption of coal state maximum in the world, and coal accounts for the 3/4 of China's primary energy, and sulphur is as coal exploitation profit
It is concerned with one of most important environmental hazard ingredient in the process.Wherein, coal of the sulfur content more than 3% is referred to as height
Sulphur coal, and high-sulfur coal reserves accounts for about the 1/3 of coal gross reserves, and sulphur coal yield also increases year by year.
General coal-burning boiler is using SO in the tail gas of high sulfur coal combustion generation2Content is 8000-12000mg/m3, concentration compared with
Height, the SO that fire coal generates2Be discharged into air, result in serious environmental pollution, it is annual caused by economic loss up to tens billion of.Although
The SO 2 from fume concentration that high sulfur coal combustion generates is higher, but the concentration of relieving haperacidity requirement is not achieved, and needs to carry out at desulfurization
Reason.And general desulfurization technology is by the way of first grade desulfurizing at present, substantially less than desired discharge standard, only using more
Grade desulfurization can be only achieved related request.And Multistage desulfuration not only increases the cost of smoke gas treatment, it is also necessary to the occupation of land face of bigger
Product, very big burden is caused to enterprise.In recent years, increasingly strict with discharging standards, sulphur coal using and exploiting
It is all restricted, key area boiler fired coal starts to be forbidden to use sulphur coal.Resource is not only wasted in this way, increases related enterprise
The operating cost of industry, and it is larger to the economic development of sulphur coal producing region and personnel's effect on employment.
Invention content
Problem is efficiently used present invention aim to address sulphur coal, a kind of oxygen-enriched method burning high sulfur coal is provided, is generated
Directly carry out flue gas acid preparing containing high-concentration sulfur dioxide tail gas, can effectively solve existing high sulfur coal combustion vent gas treatment and be stranded
Difficult, of high cost, the problems such as the Sulphur ressource rate of recovery is low sulphur coal oxygen-enriched combusting flue gas acid preparing techniques.
In order to solve the above technical problems, the technical scheme is that：One kind is suitable for sulphur coal oxygen-enriched combusting flue gas system
Sour technique, including sequentially connected oxygen generation system, coal-burning boiler system, dust pelletizing system, cleaning system and acid making system, air warp
Obtained after oxygen generation system it is oxygen-enriched, it is oxygen-enriched to enter coal-burning boiler system as combustion adjuvant, with adding sulphur in coal-burning boiler system
Sulphur coal be mixed and burned, the flue gas after burning enters dust pelletizing system, and the flue gas after dust pelletizing system dedusting enters purification system
Sulfuric acid is made into acid making system after the circulated sprinkling liquid purification in cleaning system in system, flue gas.
Preferably, the coal-burning boiler system include coal-burning boiler, coal-burning boiler be general industry coal-burning boiler, coal-fired pot
Stove is equipped with oxygen-enriched import, sulphur coal import and the first exhanst gas outlet, oxygen-enriched the entering by oxygen-enriched import of oxygen generation system generation
Coal-burning boiler system, sulphur coal enter coal-burning boiler system by sulphur coal import, and sulphur coal can root before entering boiler system
Sulphur is added in right amount according to relieving haperacidity demand, and the oxygen-enriched flue gas with after the high sulfur coal combustion for adding sulphur is arranged by the first exhanst gas outlet
Go out.
Preferably, the additive amount of sulphur is in the sulphur coal：Sulphur additive amount is 0 gram to 100 in every 1 kilogram of sulphur coal
Gram.
Preferably, the dust pelletizing system is bag-type dust removal system, and dust pelletizing system includes dust pelletizing system main body, dust pelletizing system master
Body is equipped with the first gas inlet and the second exhanst gas outlet, flue gas after coal-burning boiler system burns by the first flue gas into
Mouth enters dust pelletizing system main body, and the flue gas after dust pelletizing system main body dedusting is discharged by the second exhanst gas outlet.
Preferably, the efficiency of dust collection of the dust pelletizing system is more than 99%.
Preferably, the cleaning system is circulated sprinkling system, and cleaning system includes cleaning system main body, cleaning system master
Body is equipped with the second gas inlet, third exhanst gas outlet, circulation fluid import and circulation fluid outlet, after dust pelletizing system dedusting
Flue gas enters cleaning system main body by the second gas inlet, and circulated sprinkling liquid enters cleaning system main body by circulation fluid import
After gas cleaning, then exported and discharged by circulation fluid.
Preferably, the circulated sprinkling liquid is acid solution.
Preferably, the acid making system uses double-absorption acid-making process, and acid making system includes acid making system main body, sulfuric acid
Outlet, third gas inlet and the 4th exhanst gas outlet.
Preferably, the oxygen generation system includes oxygenerator, and oxygenerator is pressure swing adsorption oxygen, and air enters oxygen generation system
The oxygen-rich concentration produced afterwards is in 70%-95%.
The beneficial effects of the invention are as follows：
1st, one kind provided by the present invention is suitable for sulphur coal oxygen-enriched combusting flue gas acid preparing process makes full use sulphur coal, most
The utilization resource of limits reduces the coal resource pressure in China.
2nd, oxygen-enriched combusting can reduce the amount of nitrogen in air, substantially reduce the smoke discharge amount after burning, reduce the later stage
The cost of smoke gas treatment.
3rd, oxygen-enriched combusting can improve the burning-up rate of coal about 1% or so, reduce the solid slag that burning generates, increase simultaneously
Steam (hot water) yield.
4th, while using sulphur coal, Sulphur ressource has been recycled to greatest extent, has increased income.
5th, generally speaking, which is greatly saved cost, only need to increase oxygen generation system in original boiler system, so that it may
To recycle Sulphur ressource, and solve the problems such as high sulfur coal combustion fume treatment is difficult.
Description of the drawings
Fig. 1 is a kind of principle schematic suitable for sulphur coal oxygen-enriched combusting flue gas acid preparing technique of the invention；
Fig. 2 is a kind of process flow chart suitable for sulphur coal oxygen-enriched combusting flue gas acid preparing technique of the invention.
Reference sign：1st, oxygen generation system；2nd, coal-burning boiler system；3rd, dust pelletizing system；4th, cleaning system；5th, relieving haperacidity system
System；11st, air intlet；12nd, oxygen-enriched outlet；21st, oxygen-enriched import；22nd, sulphur coal import；23rd, the first exhanst gas outlet；31st, dedusting
System body；32nd, the first gas inlet；33rd, the second exhanst gas outlet；41st, cleaning system main body；42nd, the second gas inlet；43、
Third exhanst gas outlet；44th, circulation fluid import；45th, circulation fluid exports；51st, acid making system main body；52nd, sulfuric acid exports；53rd, third
Gas inlet；54th, the 4th exhanst gas outlet.
Specific embodiment
The present invention is described further in the following with reference to the drawings and specific embodiments：
As depicted in figs. 1 and 2, one kind provided by the invention is suitable for sulphur coal oxygen-enriched combusting flue gas acid preparing technique, including
Sequentially connected oxygen generation system 1, coal-burning boiler system 2, dust pelletizing system 3, cleaning system 4 and acid making system 5, air enter oxygen processed
System 1 obtained through pressure-variable adsorption it is oxygen-enriched, it is oxygen-enriched to be mixed into after coal-burning boiler system 2 with the sulphur coal of admixture sulphur that adds in
It closes, then burns in coal-burning boiler system 2, the flue gas after oxygen-enriched and high sulfur coal combustion enters dust pelletizing system 3, by dedusting system
The flue gas after 3 dedustings of uniting enters cleaning system 4, and flue gas enters relieving haperacidity after the purification of the circulated sprinkling liquid in cleaning system 4
Sulfuric acid is made in system 5.
Oxygen generation system 1 includes oxygenerator, and oxygenerator is pressure swing adsorption oxygen in the present embodiment, and air enters oxygen system processed
The oxygen-rich concentration generated after system 1 is in 70%-95%, the oxygen-enriched a concentration of 80%-90% of optimal selection.Oxygen generation system 1 is equipped with
Air intlet 11 and oxygen-enriched outlet 12, air enters oxygen generation system 1 by air intlet 11, by 1 pressure-variable adsorption of oxygen generation system
After generate it is oxygen-enriched, pass through it is oxygen-enriched outlet 12 discharge oxygen generation systems 1.
Coal-burning boiler system 2 includes coal-burning boiler, and coal-burning boiler is general industry coal-burning boiler, and coal-burning boiler is equipped with richness
Oxygen import 21,22 and first exhanst gas outlet 23 of sulphur coal import, the oxygen-enriched of the generation of oxygen generation system 1 enter combustion by oxygen-enriched import 21
Coal burning boiler system 2, sulphur coal enters coal-burning boiler system 2 by sulphur coal import 22, before sulphur coal enters coal-burning boiler system 2
Sulphur can be added in right amount according to relieving haperacidity demand, the oxygen-enriched flue gas with after high sulfur coal combustion is discharged by the first exhanst gas outlet 23.
Sulphur coal, wherein the content of sulphur is 0 gram to 100 grams in every 1 kilogram of sulphur coal, actually makes before coal-burning boiler system is added in
With in the process can be depending on specific use demand.
Dust pelletizing system 3 is bag-type dust removal system, and dust pelletizing system 3 includes dust pelletizing system main body 31, in dust pelletizing system main body 31
Equipped with the first gas inlet 32 and the second exhanst gas outlet 33, the flue gas after the burning of coal-burning boiler system 2 passes through the first flue gas
Import 32 enters dust pelletizing system main body 31, and the flue gas after 31 dedusting of dust pelletizing system main body passes through 33 row of the second exhanst gas outlet
Go out.The efficiency of dust collection of dust pelletizing system 3 is more than 99%.
Cleaning system 4 is circulated sprinkling system, and cleaning system 4 includes cleaning system main body 41, in cleaning system main body 41
Equipped with the second gas inlet 42, third exhanst gas outlet 43, circulation fluid import 44 and circulation fluid outlet 45, removed by dust pelletizing system 3
Flue gas after dirt enters cleaning system main body 41 by the second gas inlet 42, and circulated sprinkling liquid is entered by circulation fluid import 44
After cleaning system main body 41 is to gas cleaning, then pass through 45 discharge of circulation fluid outlet.Circulated sprinkling liquid be water or acid solution, preferably
Acid solution is as circulation fluid.
Acid making system 5 inhales technique or double-absorption technique using one turn one, and acid making system 5 uses two turns in the present embodiment
Two absorption acid-making process, acid making system 5 include acid making system main body 51, sulfuric acid outlet 52,53 and the 4th flue gas of third gas inlet
Outlet 54.Oxygen generation system 1 and acid making system 5 are conventional system in the present embodiment.
For the ease of understanding the operation principle and process of the present invention, special using sulfur content as 3.2% coal, Coal-fired capacity is
For the boiler of 50000kg/h, the technological process of the present invention is described further：
Flow is 98000m3/ h air enters oxygen generation system 1 by air intlet 11, passes through transformation in oxygen generation system 1
Absorption obtains 90% oxygen-enriched 21800m3/ h, generation it is oxygen-enriched by it is oxygen-enriched outlet 12 discharge oxygen generation systems 1, and through it is oxygen-enriched into
Mouth 21 enters coal-burning boiler system 2, and the sulphur that 50000kg/h sulphur coal adds in 4000kg/h enters after mixing from import 22
Coal-burning boiler system 2；The exhaust gas volumn that the burning of coal-burning boiler system 2 generates is 82600m3/ h, wherein content of sulfur dioxide are 6%,
Flue gas is discharged through the first exhanst gas outlet 23, by the first gas inlet 32 enter dust pelletizing system 3 dust pelletizing system main body 31, except
It after more than 99% dust is removed in dirt system body 31, is discharged by the second exhanst gas outlet 33, the flue gas that dust pelletizing system 3 is discharged
Enter cleaning system 4 through the second gas inlet 42, purification main body 41 is removed by circulated sprinkling acid solution in flue gas in cleaning system 4
Extra dust, arsenic, fluorine, the impurity such as chlorine, circulated sprinkling acid solution enters cleaning system main body 41 by circulation fluid import 44, passes through
After the mode and smoke contacts of countercurrent spray, by 45 discharge of circulation fluid outlet, flue gas removes residual impurity in cleaning system 4
Afterwards, it is discharged by third exhanst gas outlet 43, and passes through gas inlet 53 and enter acid making system 5, pass through two turns in acid making system 5
Two inhale technique productions sulfuric acid, and obtained sulfuric acid is collected by sulfuric acid outlet 52.98% sulphuric acid output be 125kt/a, final system
Acid fume gas is discharged through the 4th exhanst gas outlet 54.
In conclusion it is provided by the invention a kind of suitable for sulphur coal oxygen-enriched combusting flue gas acid preparing technique, sulphur coal is fired
The combustion adjuvant of burning by air become 90% it is oxygen-enriched, improve the burning-up rate of coal, while sulphur is added in sulphur coal by adjusting
The sulfur dioxide in flue gas concentration that most obtains at last of amount be increased to more than 4%, reach relieving haperacidity sulfur dioxide in flue gas content
It is required that obtained high-concentration sulfur dioxide tail gas, by double-absorption technique relieving haperacidity, recycles after dedusting, removal impurity
Most Sulphur ressource, while the exhaust gas volumn that fire coal is generated reduces nearly 40%, solves sulphur coal and is lacked using restricted
It falls into, improves the utilization rate of coal resources in China.
Those of ordinary skill in the art will understand that the embodiments described herein, which is to help reader, understands this hair
Bright principle, it should be understood that protection scope of the present invention is not limited to such specific embodiments and embodiments.This field
Those of ordinary skill can make according to these technical inspirations disclosed by the invention various does not depart from the other each of essence of the invention
The specific deformation of kind and combination, these deform and combine still within the scope of the present invention.
Claims (9)
1. one kind is suitable for sulphur coal oxygen-enriched combusting flue gas acid preparing technique, it is characterised in that：Including sequentially connected oxygen generation system
(1), coal-burning boiler system (2), dust pelletizing system (3), cleaning system (4) and acid making system (5), air is after oxygen generation system (1)
Obtain it is oxygen-enriched, it is oxygen-enriched to enter coal-burning boiler system (2) as combustion adjuvant, with adding the height of sulphur in coal-burning boiler system (2)
Sulphur coal is mixed and burned, and the flue gas after burning enters dust pelletizing system (3), and the flue gas after dust pelletizing system (3) dedusting enters purification
Sulfuric acid is made into acid making system (5) after the purification of the circulated sprinkling liquid in cleaning system (4) in system (4), flue gas.
It is 2. according to claim 1 a kind of suitable for sulphur coal oxygen-enriched combusting flue gas acid preparing technique, it is characterised in that：It is described
Coal-burning boiler system (2) includes coal-burning boiler, and coal-burning boiler is general industry coal-burning boiler, and coal-burning boiler is equipped with oxygen-enriched import
(21), sulphur coal import (22) and the first exhanst gas outlet (23), oxygen generation system (1) generate it is oxygen-enriched by oxygen-enriched import (21) into
Enter coal-burning boiler system (2), sulphur coal by sulphur coal import (22) into coal-burning boiler system (2), it is oxygen-enriched and add sulphur
High sulfur coal combustion after flue gas pass through the first exhanst gas outlet (23) discharge.
It is 3. according to claim 2 a kind of suitable for sulphur coal oxygen-enriched combusting flue gas acid preparing technique, it is characterised in that：It is described
The additive amount of sulphur is that sulphur additive amount is 0 gram to 100 grams in every 1 kilogram of sulphur coal in sulphur coal.
It is 4. according to claim 1 a kind of suitable for sulphur coal oxygen-enriched combusting flue gas acid preparing technique, it is characterised in that：It is described
Dust pelletizing system (3) is bag-type dust removal system, and dust pelletizing system (3) includes dust pelletizing system main body (31), in dust pelletizing system main body (31)
Equipped with the first gas inlet (32) and the second exhanst gas outlet (33), flue gas after coal-burning boiler system (2) burning passes through the
For one gas inlet (32) into dust pelletizing system main body (31), the flue gas after dust pelletizing system main body (31) dedusting passes through the second cigarette
Gas outlet (33) discharge.
It is 5. according to claim 4 a kind of suitable for sulphur coal oxygen-enriched combusting flue gas acid preparing technique, it is characterised in that：It is described
The efficiency of dust collection of dust pelletizing system (3) is more than 99%.
It is 6. according to claim 1 a kind of suitable for sulphur coal oxygen-enriched combusting flue gas acid preparing technique, it is characterised in that：It is described
Cleaning system (4) is circulated sprinkling system, and cleaning system (4) includes cleaning system main body (41), in cleaning system main body (41)
(45) are exported equipped with the second gas inlet (42), third exhanst gas outlet (43), circulation fluid import (44) and circulation fluid, by dedusting
Flue gas after system (3) dedusting is by the second gas inlet (42) into cleaning system main body (41), and circulated sprinkling liquid is by following
Ring liquid import (44) into cleaning system main body (41) to gas cleaning after, then by circulation fluid export (45) discharge.
It is 7. according to claim 1 a kind of suitable for sulphur coal oxygen-enriched combusting flue gas acid preparing technique, it is characterised in that：It is described
Circulated sprinkling liquid is acid solution.
It is 8. according to claim 1 a kind of suitable for sulphur coal oxygen-enriched combusting flue gas acid preparing technique, it is characterised in that：It is described
Acid making system (5) using double-absorption acid-making process, acid making system (5) including acid making system main body (51), sulfuric acid outlet (52),
Third gas inlet (53) and the 4th exhanst gas outlet (54).
9. sulphur coal oxygen-enriched combusting flue gas acid preparing technique is suitable for according to one kind that claims 1 or 2 is stated, it is characterised in that：Institute
It states oxygen generation system (1) and includes oxygenerator, oxygenerator is pressure swing adsorption oxygen, and air enters the richness that oxygen generation system (1) produces afterwards
Oxygen concentration is in 70%-95%.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201810083135.7A CN108190846A (en) | 2018-01-29 | 2018-01-29 | One kind is suitable for sulphur coal oxygen-enriched combusting flue gas acid preparing technique |
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| CN201810083135.7A CN108190846A (en) | 2018-01-29 | 2018-01-29 | One kind is suitable for sulphur coal oxygen-enriched combusting flue gas acid preparing technique |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
| CN111099564A (en) * | 2018-10-29 | 2020-05-05 | 中国石油化工股份有限公司 | Method for recovering waste sulfuric acid by using high-sulfur coal as fuel |
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| US3882671A (en) * | 1971-09-14 | 1975-05-13 | Brayton Cycle Improvement Ass | Gasification method with fuel gas cooling |
| CN102261647A (en) * | 2011-05-18 | 2011-11-30 | 成都华西工业气体有限公司 | Oxygen enriched combustion and smoke comprehensive treatment process of high-sulfur coal |
| CN103537187A (en) * | 2013-10-24 | 2014-01-29 | 北京诺曼斯佰环保科技有限公司 | Sulfur dioxide enriched gas purification system and method for preparing sulfur by gas purification |
| CN106310847A (en) * | 2016-09-14 | 2017-01-11 | 广东电网有限责任公司电力科学研究院 | Oxygen-enriched combustion boiler flue gas purification and resource recycling system and process |
| CN106629631A (en) * | 2017-01-03 | 2017-05-10 | 扬州嘉明环保科技有限公司 | Oxygen-enriched combustion-assistance waste sulfuric acid lytic system and technology |
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| US3882671A (en) * | 1971-09-14 | 1975-05-13 | Brayton Cycle Improvement Ass | Gasification method with fuel gas cooling |
| CN102261647A (en) * | 2011-05-18 | 2011-11-30 | 成都华西工业气体有限公司 | Oxygen enriched combustion and smoke comprehensive treatment process of high-sulfur coal |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN111099564A (en) * | 2018-10-29 | 2020-05-05 | 中国石油化工股份有限公司 | Method for recovering waste sulfuric acid by using high-sulfur coal as fuel |
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