CN106215663A - Desulphurization system that a kind of negative pressure and malleation combine and technique - Google Patents
Desulphurization system that a kind of negative pressure and malleation combine and technique Download PDFInfo
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- CN106215663A CN106215663A CN201610782350.7A CN201610782350A CN106215663A CN 106215663 A CN106215663 A CN 106215663A CN 201610782350 A CN201610782350 A CN 201610782350A CN 106215663 A CN106215663 A CN 106215663A
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- negative pressure
- malleation
- tower
- sulfur
- circulating pump
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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
- B01D53/34—Chemical or biological purification of waste gases
- B01D53/74—General processes for purification of waste gases; Apparatus or devices specially adapted therefor
- B01D53/77—Liquid phase processes
- B01D53/78—Liquid phase processes with gas-liquid contact
-
- 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
- B01D53/34—Chemical or biological purification of waste gases
- B01D53/46—Removing components of defined structure
- B01D53/48—Sulfur compounds
-
- 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
- B01D53/34—Chemical or biological purification of waste gases
- B01D53/74—General processes for purification of waste gases; Apparatus or devices specially adapted therefor
- B01D53/86—Catalytic processes
- B01D53/8603—Removing sulfur compounds
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2251/00—Reactants
- B01D2251/20—Reductants
- B01D2251/206—Ammonium compounds
- B01D2251/2062—Ammonia
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Environmental & Geological Engineering (AREA)
- Health & Medical Sciences (AREA)
- Biomedical Technology (AREA)
- Analytical Chemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Oil, Petroleum & Natural Gas (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Industrial Gases (AREA)
- Treating Waste Gases (AREA)
Abstract
The present invention relates to a kind of negative pressure and the desulphurization system of malleation combination, including negative pressure ammonia process desulfuration tower and malleation alkali desulphurization tower, connect before negative pressure ammonia process desulfuration tower and have electric trapper；Reactive tank, foam tank and converter it is provided with after negative pressure ammonia process desulfuration tower；There are circulating pump and circulating pump reactive tank other connection；Connect after foam tank and have sulfur melting kettle and sulfur melting kettle；It is provided with reactive tank, foam tank and gas storage holder after malleation alkali desulphurization tower；Connect after foam tank and have sulfur melting kettle and sulfur melting kettle；There are circulating pump and circulating pump reactive tank other connection.Desulphurization system that the negative pressure of the present invention and malleation combine and technique, not only Appropriate application coke-oven plant coal gas cold and heat, decrease equipment investment simultaneously, compared with traditional process, decrease chilldown system, reduce by a desulfurizing tower, reduce the gas heater of sulfur ammonium, thus decrease discharging of waste liquid, and improve desulfuration efficiency, provide cost savings.
Description
Technical field
The present invention relates to technical field of desulfurization in coking production, the desulphurization system combined particularly to a kind of negative pressure and malleation
And technique.
Background technology
At present, domestic sulfur method is divided into dry and wet two kinds, and wet method is divided into negative pressure to take off by blower fan front and back position
Sulfur and 2 kinds of methods of malleation desulfurization, be divided into ammonia process and alkaline process two kinds if distinguishing by alkali, and domestic desulfurization is usually three tower desulfurization, i.e.
Three tower ammonia process or alkaline process series connection, not only energy consumption is high, and secondary salt content is high, needs to replace in a large number doctor solution, causes alkali liquor and urges
Agent loss is higher, and doctor solution intractability is big costly.
Summary of the invention
It is an object of the invention to overcome the defect of above-mentioned prior art to provide a kind of negative pressure and the desulfurization of malleation combination
System and sulfur removal technology, not only Appropriate application coke-oven plant coal gas cold and heat, decrease equipment investment simultaneously, decrease waste liquid
Discharge, improves desulfuration efficiency.Its technical scheme is:
The desulphurization system that a kind of negative pressure and malleation combine, including a negative pressure ammonia process desulfuration tower and a malleation alkali desulphurization tower,
Connect before described negative pressure ammonia process desulfuration tower and have an electric trapper；
A reactive tank, a foam tank and a converter it is provided with after described negative pressure ammonia process desulfuration tower；
There are circulating pump and circulating pump described reactive tank other connection；
Connect after described foam tank and have sulfur melting kettle and sulfur melting kettle；
It is provided with a reactive tank, a foam tank and a gas storage holder after described malleation alkali desulphurization tower；
Connect after described foam tank and have sulfur melting kettle and sulfur melting kettle；
There are circulating pump and circulating pump described reactive tank other connection.
Further, decolouring unit, upgrading unit, adjustment unit and crystalline element it are provided with in described converter.
Further, before described decolouring unit, connection has filter.
Further, after described decolouring unit, connection has filter.
Further, it is provided with filter between described adjustment unit and crystalline element.
The desulphurization system that a kind of negative pressure and malleation combine carries out the technique of desulfurization, coal gas is sent into primary cooler and carries out tentatively
Cooling, electric trapper dedusting, gas temperature reaches 25 DEG C, is then sent into by coal gas in negative pressure ammonia process desulfuration tower and carries out one-level ammonia process and take off
Sulfur desulfurization, uses catalytic oxidation, after doctor solution absorbs the ammonia in coal gas, adds catalyst and carries out desulfurization, and doctor solution is converting
In tower, ammonia thiosulfate is converted, through concentrating, filter, decolour, adjust, crystallize, cooling down, isolate ammonium sulfate, ammonia,
Ammonium thiocyanate and clear liquid；Make in coal gas hydrogen sulfide content by 6000mg/Nm by first grade desulfurizing3It is reduced to 1000mg/Nm3；Then
Coal gas is sent into sulfur ammonium, crude benzol workshop section, after crude benzol workshop section, is delivered in malleation alkali desulphurization tower carry out two grades of alkali desulphurization works
Skill, allocates the stabilizer of suppression side reaction, the generation of suppression secondary salt in doctor solution into, makes doctor solution discharge capacity be less than 7 sides every day,
Sulfur content in coal gas is less than 20mg/Nm3, after coal gas after two grades of alkali desulphurizations be delivered to gas storage holder and store.
Beneficial effect: the negative pressure of the present invention and the desulphurization system of malleation combination and technique, not only Appropriate application coke-oven plant coal
Air cooling amount and heat, decrease equipment investment simultaneously, compared with traditional process, decreases chilldown system, reduces by a desulfurizing tower,
Reduce the gas heater of sulfur ammonium, thus decrease discharging of waste liquid, and improve desulfuration efficiency, provide cost savings.
Accompanying drawing explanation
Fig. 1 is the desulphurization system schematic diagram of the present invention；
In figure: 10. negative pressure ammonia process desulfuration tower, 11. electric trappers, 12. foam tanks, 13. sulfur melting kettles, 14. sulfur melting kettles, 15. is anti-
Answering groove, 16. circulating pumps, 17. circulating pumps, 18. converters, 181. decolouring unit, 182. filters, 183. filters, 184. is dense
Contracting unit, 185. adjustment units, 186. filter elements, 187. crystalline elements, 20. sulfur ammonia, 30. crude benzol workshop sections, 40. malleation alkaline process
Desulfurizing tower, 41. reactive tanks, 42. circulating pumps, 43. circulating pumps, 44. gas storage holders, 45. sulfur melting kettles, 46. sulfur melting kettles, 47. foam tanks,
50. elemental sulfurs, 60. activated carbons, 70. clear liquids, 80. ammonium sulfate, 90. ammonium thiocyanates, 100. ammonia.
Detailed description of the invention
Presently in connection with accompanying drawing, invention is further described.Accompanying drawing is that the schematic diagram simplified illustrates this most in a schematic way
The basic structure of invention, therefore it only shows the composition relevant with the present invention.
See Fig. 1, the desulphurization system that the negative pressure of the present invention and malleation combine, including a negative pressure ammonia process desulfuration tower 10 and just
Pressure alkali desulphurization tower 40, connects before negative pressure ammonia process desulfuration tower 10 and has an electric trapper 11；
Reactive tank 15, one foam tank 12 and a converter 18 it is provided with after negative pressure ammonia process desulfuration tower 10；Reactive tank 15 is other to be connected
It is connected to circulating pump 16 and circulating pump 17；Connect after foam tank 12 and have sulfur melting kettle 13 and sulfur melting kettle 14；It is provided with decolouring in converter 18
Unit 181, upgrading unit 184, adjustment unit 185 and crystalline element 187；Connect before decolouring unit 181 and have filter 182；De-
Connect after color element 181 and have filter 183；Filter 186 it is provided with between adjustment unit 185 and crystalline element 187.
Reactive tank 41, one foam tank 46 and a gas storage holder 44 it is provided with after malleation alkali desulphurization tower 40；Connect after foam tank 46
It is connected to sulfur melting kettle 46 and sulfur melting kettle 45；There are circulating pump 42 and circulating pump 43 reactive tank 41 other connection.
The desulphurization system that the negative pressure of the present invention and malleation combine, by a tower negative pressure ammonia process desulfuration tower and a malleation
Alkali desulphurization tower is connected, and negative pressure ammonia process desulfuration tower can utilize the cold of primary cooler before electric trapper 11, can carry under negative pressure state
High volatilization ammonia and absorption efficiency, the generation of suppression secondary salt.After electric trapper 11, gas temperature reaches 25 DEG C, is then sent into by coal gas negative
Pressure ammonia process desulfuration tower 10 carries out one-level ammonia process of desulfurization desulfurization, uses catalytic oxidation, after doctor solution absorbs the ammonia in coal gas, add
Entering catalyst and carry out desulfurization, after desulfurization, coal gas temperature after blower fan pressurizes rises to 55 degree, can reduce sulfur ammonium steam-heating system,
Meet the ammonium sulfate production requirement of lower workshop section；Then in converter 18, ammonia thiosulfate is converted, through concentrating, filtering, take off
Color, adjust, crystallize, cool down, isolate ammonium sulfate 80, ammonia 100, ammonium thiocyanate 90 and clear liquid 70；Coal is made by first grade desulfurizing
In gas, hydrogen sulfide content is by 6000mg/Nm3It is reduced to 1000mg/Nm3。
Coal gas after the one-level ammonia process of desulfurization, is conveyed into sulfur ammonium 20, crude benzol workshop section 30, sends into malleation after crude benzol workshop section 30
Alkali desulphurization tower 40 carries out two grades of alkali method desulfurizing technologies, doctor solution is allocated into the stabilizer of suppression side reaction, suppress secondary salt
Generation, make doctor solution discharge capacity be less than 20mg/Nm less than 7 sides, the sulfur content in coal gas every day3, after take off through two grades of alkaline process
Coal gas after sulfur is delivered to gas storage holder and stores
Present invention utilizes Hua Chan workshop, coke-oven plant Gu Leng workshop section is negative pressure section before blower fan, and doctor solution volatilization ammonia density
Higher, be suitable to desulfurization negative-pressure operation, after electric trapper, therefore build a negative pressure ammonia process desulfuration tower just can reduce by a pre-cooling tower
And auxiliary device, after blower fan pressurized gas, temperature rises to 55 DEG C, it is possible to reduce the steam consumption of sulfur ammonium heating gas, uses ammonia still process
Ammonia in strong aqua ammonia, clear liquid 70 and coal gas does alkali source, can reduce equipment investment and operating energy resource consumption, suppresses secondary simultaneously
The generation of salt.Owing to negative pressure desulfurization is coal-tar middle oil and naphthalene content is higher, desulfurization export targets is only required and is reached 1000mg/Nm3Below.
After over cure ammonium and crude benzol workshop section, enter back into alkali desulphurization tower desulfurization, hydrogen sulfide in coal gas can be made to drop to about 20 milligrams.
The sulfur removal technology of the present invention not only Appropriate application coke-oven plant coal gas cold and heat, decrease equipment investment simultaneously,
Compared with traditional process, decrease chilldown system, decrease a desulfurizing tower, decrease the gas heater of sulfur ammonium, desulfurization pump
Power reduce the most accordingly, thus decrease discharging of waste liquid, decrease power-equipment, improve desulfuration efficiency, with traditional three
Tower desulfurization is compared and is greatly saved cost.
Although above the present invention being described in detail, but the invention is not restricted to this, those skilled in the art of the present technique
Various amendment can be carried out according to the principle of the present invention.Therefore, all amendments made according to the principle of the invention, all should be understood to
Fall into protection scope of the present invention.
Claims (6)
1. the desulphurization system that negative pressure and malleation combine, including a negative pressure ammonia process desulfuration tower (10) and a malleation alkali desulphurization tower
(40), it is characterised in that the front connection of described negative pressure ammonia process desulfuration tower (10) has an electric trapper (11)；
A reactive tank (15), a foam tank (12) and a converter (18) it is provided with after described negative pressure ammonia process desulfuration tower (10)；
There are circulating pump (16) and circulating pump (17) described reactive tank (15) other connection；
Described foam tank (12) connects afterwards sulfur melting kettle (13) and sulfur melting kettle (14)；
A reactive tank (41), a foam tank (46) and a gas storage holder (44) it is provided with after described malleation alkali desulphurization tower (40)；
Described foam tank (46) connects afterwards sulfur melting kettle (46) and sulfur melting kettle (45)；
There are circulating pump (42) and circulating pump (43) described reactive tank (41) other connection.
The desulphurization system that negative pressure the most according to claim 1 and malleation combine, it is characterised in that in described converter (18)
It is provided with decolouring unit (181), upgrading unit (184), adjustment unit (185) and crystalline element (187).
The desulphurization system that negative pressure the most according to claim 2 and malleation combine, it is characterised in that described decolouring unit
(181) front connection has filter (182).
The desulphurization system that negative pressure the most according to claim 2 and malleation combine, it is characterised in that described decolouring unit
(181) connection has filter (183) afterwards.
The desulphurization system that negative pressure the most according to claim 2 and malleation combine, it is characterised in that described adjustment unit
And between crystalline element (187), be provided with filter (186) (185).
6. the work carrying out desulfurization by the desulphurization system combined according to the negative pressure described in any one of Claims 1 to 5 and malleation
Skill, it is characterised in that coal gas is sent into primary cooler and tentatively cools down, electric trapper (11) dedusting, gas temperature reaches 25 DEG C, so
After coal gas sent into negative pressure ammonia process desulfuration tower (10) carries out one-level ammonia process of desulfurization desulfurization, use catalytic oxidation, doctor solution is inhaled
After receiving the ammonia in coal gas, adding catalyst and carry out desulfurization, ammonia thiosulfate is converted converter (18) is inner by doctor solution, warp
Cross and concentrate, filter, decolour, adjust, crystallize, cool down, isolate ammonium sulfate (80), ammonia (100), ammonium thiocyanate (90) and clear liquid
(70)；Make in coal gas hydrogen sulfide content by 6000mg/Nm by first grade desulfurizing3It is reduced to 1000mg/Nm3；Then coal gas is sent into
Sulfur ammonium (20), crude benzol workshop section (30), be delivered in malleation alkali desulphurization tower (40) carry out two grades of alkaline process after crude benzol workshop section (30)
Sulfur removal technology, allocates the stabilizer of suppression side reaction, the generation of suppression secondary salt in doctor solution into, makes doctor solution discharge capacity little for every day
In 7 sides, the sulfur content in coal gas is less than 20mg/Nm3, after coal gas after two grades of alkali desulphurizations be delivered to gas storage holder and store up
Deposit.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610782350.7A CN106215663A (en) | 2016-08-31 | 2016-08-31 | Desulphurization system that a kind of negative pressure and malleation combine and technique |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201610782350.7A CN106215663A (en) | 2016-08-31 | 2016-08-31 | Desulphurization system that a kind of negative pressure and malleation combine and technique |
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Citations (7)
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Application publication date: 20161214 |