CN111944563A - Novel blast furnace gas desulfurization system - Google Patents

Novel blast furnace gas desulfurization system Download PDF

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Publication number
CN111944563A
CN111944563A CN202010964572.7A CN202010964572A CN111944563A CN 111944563 A CN111944563 A CN 111944563A CN 202010964572 A CN202010964572 A CN 202010964572A CN 111944563 A CN111944563 A CN 111944563A
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China
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tower
blast furnace
desulfurization
furnace gas
section
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CN202010964572.7A
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Chinese (zh)
Inventor
杨猛
龙志峰
安忠义
徐庆余
徐华祥
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Huatian Engineering and Technology Corp MCC
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Huatian Engineering and Technology Corp MCC
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Priority to CN202010964572.7A priority Critical patent/CN111944563A/en
Publication of CN111944563A publication Critical patent/CN111944563A/en
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    • C—CHEMISTRY; METALLURGY
    • C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
    • C10K—PURIFYING OR MODIFYING THE CHEMICAL COMPOSITION OF COMBUSTIBLE GASES CONTAINING CARBON MONOXIDE
    • C10K1/00—Purifying combustible gases containing carbon monoxide
    • C10K1/002—Removal of contaminants
    • C10K1/003—Removal of contaminants of acid contaminants, e.g. acid gas removal
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D46/00—Filters or filtering processes specially modified for separating dispersed particles from gases or vapours
    • B01D46/10—Particle separators, e.g. dust precipitators, using filter plates, sheets or pads having plane surfaces
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D46/00—Filters or filtering processes specially modified for separating dispersed particles from gases or vapours
    • B01D46/66—Regeneration of the filtering material or filter elements inside the filter
    • B01D46/70—Regeneration of the filtering material or filter elements inside the filter by acting counter-currently on the filtering surface, e.g. by flushing on the non-cake side of the filter
    • 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
    • B01D53/02—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 by adsorption, e.g. preparative gas chromatography
    • 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
    • C—CHEMISTRY; METALLURGY
    • C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
    • C10K—PURIFYING OR MODIFYING THE CHEMICAL COMPOSITION OF COMBUSTIBLE GASES CONTAINING CARBON MONOXIDE
    • C10K1/00—Purifying combustible gases containing carbon monoxide
    • C10K1/002—Removal of contaminants
    • C10K1/003—Removal of contaminants of acid contaminants, e.g. acid gas removal
    • C10K1/004—Sulfur containing contaminants, e.g. hydrogen sulfide
    • C—CHEMISTRY; METALLURGY
    • C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
    • C10K—PURIFYING OR MODIFYING THE CHEMICAL COMPOSITION OF COMBUSTIBLE GASES CONTAINING CARBON MONOXIDE
    • C10K1/00—Purifying combustible gases containing carbon monoxide
    • C10K1/02—Dust removal
    • C10K1/024—Dust removal by filtration
    • C—CHEMISTRY; METALLURGY
    • C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
    • C10K—PURIFYING OR MODIFYING THE CHEMICAL COMPOSITION OF COMBUSTIBLE GASES CONTAINING CARBON MONOXIDE
    • C10K1/00—Purifying combustible gases containing carbon monoxide
    • C10K1/32—Purifying combustible gases containing carbon monoxide with selectively adsorptive solids, e.g. active carbon
    • C—CHEMISTRY; METALLURGY
    • C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
    • C10K—PURIFYING OR MODIFYING THE CHEMICAL COMPOSITION OF COMBUSTIBLE GASES CONTAINING CARBON MONOXIDE
    • C10K1/00—Purifying combustible gases containing carbon monoxide
    • C10K1/34—Purifying combustible gases containing carbon monoxide by catalytic conversion of impurities to more readily removable materials
    • C—CHEMISTRY; METALLURGY
    • C21—METALLURGY OF IRON
    • C21B—MANUFACTURE OF IRON OR STEEL
    • C21B5/00—Making pig-iron in the blast furnace
    • C—CHEMISTRY; METALLURGY
    • C21—METALLURGY OF IRON
    • C21B—MANUFACTURE OF IRON OR STEEL
    • C21B2100/00—Handling of exhaust gases produced during the manufacture of iron or steel
    • C21B2100/40—Gas purification of exhaust gases to be recirculated or used in other metallurgical processes
    • C21B2100/42—Sulphur removal

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  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Combustion & Propulsion (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • General Chemical & Material Sciences (AREA)
  • Oil, Petroleum & Natural Gas (AREA)
  • Organic Chemistry (AREA)
  • Environmental & Geological Engineering (AREA)
  • Analytical Chemistry (AREA)
  • Health & Medical Sciences (AREA)
  • Biomedical Technology (AREA)
  • Manufacturing & Machinery (AREA)
  • Materials Engineering (AREA)
  • Metallurgy (AREA)
  • Waste-Gas Treatment And Other Accessory Devices For Furnaces (AREA)

Abstract

The invention discloses a novel blast furnace gas desulfurization system, and belongs to the technical field of blast furnace gas desulfurization. The device comprises a vertical tower body, wherein the vertical tower body comprises a dust intercepting device and a dry dechlorinating device, the output end of the vertical tower body is connected with a hydrolysis tower, the output end of the hydrolysis tower is provided with a desulfurizing tower, and the output end of the desulfurizing tower is connected with an auxiliary desulfurizing and dehydrating device. According to the invention, a part of dust can be intercepted by the dust intercepting device, chloride ions in the blast furnace gas are removed by the dry-method dechlorinating device, the influence of the chloride ions and the dust on the blast furnace gas hydrolysis catalyst is reduced, the service life of the hydrolysis catalyst is prolonged, nitrogen is conveyed by the nitrogen purging pipe, the filter screen is periodically cleared and dredged, the resistance loss caused by dust blockage is reduced, most of sulfur components are removed by the desulfurizing tower, and the excellent desulfurizing effect can be generated, thereby creating considerable economic benefits.

Description

Novel blast furnace gas desulfurization system
Technical Field
The invention relates to the technical field of blast furnace gas desulfurization, in particular to a novel blast furnace gas desulfurization system.
Background
Aiming at the problem that SO2 exceeds the standard after the byproduct of blast furnace gas in iron and steel enterprises is combusted, a tail end treatment mode is adopted in the past, namely, flue gas after the blast furnace gas is combusted is subjected to desulfurization treatment. With the adjustment of national industrial policies, the emission requirement on SO2 is greatly improved, and the tail end treatment cannot meet the emission requirement, SO that the iron and steel enterprises are required to realize the fine desulfurization of blast furnace gas from the source.
As for the blast furnace gas source fine desulfurization technology, no mature and accepted technical route exists at present. The sulfur in blast furnace gas is complex, and the blast furnace gas contains chloride ions and dust, which seriously affects the service life of the hydrolysis catalyst.
In this patent, a new type of blast furnace gas desulfurization system is designed, the blast furnace gas is first pre-treated by a dust interception and dry dechlorination device. The treated coal gas passes through a hydrolysis tower or a bypass, a desulfurizing tower can remove most of sulfur components, and finally passes through an auxiliary desulfurizing and dehydrating device.
Disclosure of Invention
1. Technical problem to be solved by the invention
Aiming at the defects and shortcomings in the prior art, the invention provides a novel blast furnace gas desulfurization system, wherein a dust intercepting device can intercept part of dust, a dry dechlorinating device is used for removing chloride ions in blast furnace gas, the influence of the chloride ions and the dust on a blast furnace gas hydrolysis catalyst is reduced, the service life of the hydrolysis catalyst is prolonged, most of sulfur components are removed by a desulfurization tower, and excellent desulfurization effect can be generated, thereby creating considerable economic benefit.
2. Technical scheme
In order to achieve the purpose, the technical scheme provided by the invention is as follows:
the novel blast furnace gas desulfurization system comprises a vertical tower body, wherein the vertical tower body comprises a dust intercepting device and a dry dechlorination device, the output end of the vertical tower body is connected with a hydrolysis tower, the output end of the hydrolysis tower is provided with a desulfurization tower, and the output end of the desulfurization tower is connected with an auxiliary desulfurization and dehydration device.
Furthermore, the vertical tower body is divided into an upper tower section and a lower tower section, the lower section is a dust intercepting device, the upper section is a dry dechlorinating device, a filter screen is arranged inside the dust intercepting device, the dust intercepting device is externally connected with a nitrogen purging pipe, and the output end of the nitrogen purging pipe points to the filter screen.
Furthermore, an atomizing spray head is arranged inside the dry dechlorination device.
Furthermore, the front end of the hydrolysis tower is provided with a bypass pipeline, the input end of the bypass pipeline is communicated with the vertical tower body, and the output end of the bypass pipeline is communicated with the desulfurization tower.
Furthermore, the desulfurization tower adopts a dry adsorption method, coal gas passes through a dust intercepting device, a dry dechlorinating device and a hydrolysis tower, organic sulfur is hydrolyzed into inorganic sulfur by the hydrolysis tower, and the inorganic sulfur is removed by the desulfurization tower.
And further, the coal gas passes through a dust intercepting device and a dry dechlorinating device and is conveyed into a desulfurizing tower through a bypass pipeline, and the desulfurizing tower simultaneously removes organic sulfur and inorganic sulfur.
Furthermore, the auxiliary desulfurization and dehydration device is divided into an upper tower section and a lower tower section, wherein the upper section is an auxiliary desulfurization section, the lower section is a dehydration section, and a nozzle is arranged in the auxiliary desulfurization sectionDesulfurizing tower outlet H2And when the S content is still higher after detection, opening a nozzle in the auxiliary desulfurization section to further desulfurize the coal gas, and finally enabling the coal gas to enter a dehydration section to remove mechanical water and then enter a pipe network system.
Further, a TRT or pressure regulating valve bank is arranged between the desulfurizing tower and the hydrolysis tower.
3. Advantageous effects
Compared with the prior art, the technical scheme provided by the invention has the following beneficial effects:
the invention is particularly applied to the blast furnace gas desulfurization work in the factory area of the iron and steel enterprise, provides a new idea for the blast furnace gas desulfurization of the metallurgical factory, can intercept partial dust through the dust intercepting device, remove chloride ions in the blast furnace gas through the dry dechlorinating device, reduce the influence of the chloride ions and the dust on the blast furnace gas hydrolysis catalyst, improve the service life of the hydrolysis catalyst, convey nitrogen through the nitrogen purging pipe, regularly clear and block a filter screen and dredge dust, reduce the resistance loss generated by dust blocking, and the treated gas passes through the hydrolysis tower or a bypass pipeline and then removes most of sulfur components through the desulfurization tower, thus generating excellent desulfurization effect and creating considerable economic benefit.
Drawings
FIG. 1 is an overall flow chart of the present invention.
In the figure: 1. a vertical tower body; 11. a dust intercepting device; 12. a dry dechlorination device; 111. filtering with a screen; 112. a nitrogen purge tube; 2. a hydrolysis tower; 3. a desulfurizing tower; 4. a bypass line; 5. an auxiliary desulfurization dehydration device; 51. an auxiliary desulfurization section; 52. and (5) a dewatering section.
Detailed Description
The invention is further described with reference to the following figures and examples:
example 1
As can be seen from fig. 1, the novel blast furnace gas desulfurization system of this embodiment includes a vertical tower body 1, the vertical tower body 1 includes a dust intercepting device 11 and a dry dechlorinating device 12, the output end of the vertical tower body 1 is connected with a hydrolysis tower 2, the output end of the hydrolysis tower 2 is provided with a desulfurization tower 3, and the output end of the desulfurization tower 3 is connected with an auxiliary desulfurization and dehydration device 5.
The vertical tower body 1 is divided into an upper tower section and a lower tower section, the lower tower section is a dust intercepting device 11, the upper tower section is a dry-method dechlorinating device 12, a filter screen 111 is arranged inside the dust intercepting device 11, the dust intercepting device 11 is externally connected with a nitrogen purging pipe 112, the output end of the nitrogen purging pipe 112 points to the filter screen 111, the dust intercepting device 11 can intercept part of dust, the influence of the dust on a blast furnace gas hydrolysis catalyst is reduced, the intercepted dust is attached to the filter screen 111, the nitrogen purging pipe 112 conveys nitrogen, the filter screen 111 is periodically cleared and dredged, the resistance loss caused by dust blockage is reduced, an atomizing nozzle is arranged inside the dry-method dechlorinating device 12, and the dry-method dechlorinating device 12 is used for.
The hydrolysis tower 2 is a conventional hydrolysis tower and is used for converting organic sulfur into inorganic sulfur, a bypass pipeline 4 is arranged at the front end of the hydrolysis tower 2, the input end of the bypass pipeline 4 is communicated with the vertical tower body 1, the output end of the bypass pipeline 4 is communicated with the desulfurization tower 3, and under special conditions, coal gas can directly enter a back-end system without passing through the hydrolysis tower 2.
The desulfurization tower 3 adopts a dry adsorption method, the desulfurization tower 3 is used for removing inorganic sulfur, under normal conditions, coal gas passes through a dust intercepting device 11, a dry dechlorination device 12 and a hydrolysis tower 2, organic sulfur is hydrolyzed into inorganic sulfur by the hydrolysis tower 2, and the desulfurization tower 3 removes the inorganic sulfur; under special conditions, the coal gas passes through the dust intercepting device 11 and the dry-method dechlorinating device 12 and is conveyed into the desulfurizing tower 3 through the bypass pipeline 4, the coal gas does not pass through the hydrolysis tower 2, and organic sulfur and inorganic sulfur are simultaneously removed from the desulfurizing tower 3.
The auxiliary desulfurization and dehydration device 5 is divided into an upper tower section and a lower tower section, the upper section is an auxiliary desulfurization section 51, the lower section is a dehydration section 52, a nozzle is arranged in the auxiliary desulfurization section 51, and when the outlet H of the desulfurization tower is connected2When the S content is detected to be still higher, the nozzles in the auxiliary desulfurization section 51 are opened to further desulfurize the coal gas, and the coal gas finally enters the dehydration section 52 to remove mechanical water and then enters the pipe network system.
A TRT or pressure regulating valve bank is arranged between the desulfurizing tower 3 and the hydrolysis tower 2.
The invention is particularly applied to the blast furnace gas desulfurization work of a factory area of an iron and steel enterprise, provides a new idea for the blast furnace gas desulfurization of a metallurgical factory, can intercept partial dust through the dust intercepting device 11, remove chloride ions in the blast furnace gas through the dry dechlorinating device 12, reduce the influence of the chloride ions and the dust on a blast furnace gas hydrolysis catalyst, prolong the service life of the hydrolysis catalyst, convey nitrogen through the nitrogen purging pipe 112, regularly clear and block the filter screen 111, dredge dust, reduce the resistance loss caused by dust blocking, the treated gas passes through the hydrolysis tower 2 or the bypass pipeline 4, and then remove most of sulfur components through the desulfurization tower 3, thus generating excellent desulfurization effect and creating considerable economic benefit.
The present invention and its embodiments have been described above schematically, without limitation, and what is shown in the drawings is only one of the embodiments of the present invention, and the actual structure is not limited thereto. Therefore, if the person skilled in the art receives the teaching, without departing from the spirit of the invention, the person skilled in the art shall not inventively design the similar structural modes and embodiments to the technical solution, but shall fall within the scope of the invention.

Claims (8)

1. The utility model provides a novel blast furnace gas desulfurization system, includes vertical tower body (1), its characterized in that: the vertical tower body (1) include dust intercepting device (11) and dry dechlorination device (12), the output of vertical tower body (1) is connected with hydrolysis tower (2), the output of hydrolysis tower (2) is provided with desulfurizing tower (3), the output of desulfurizing tower (3) is connected with supplementary desulfurization dewatering device (5).
2. The novel blast furnace gas desulfurization system according to claim 1, characterized in that: vertical tower body (1) divide into two upper and lower tower sections, the hypomere is dust intercepting device (11), the upper segment is dry dechlorination device (12), dust intercepting device (11) inside is equipped with filter screen (111), dust intercepting device (11) external nitrogen gas sweeps pipe (112), the directional filter screen (111) of output of nitrogen gas sweep pipe (112).
3. The novel blast furnace gas desulfurization system according to claim 1, characterized in that: an atomizing spray head is arranged in the dry dechlorinating device (12).
4. The novel blast furnace gas desulfurization system according to claim 1, characterized in that: the front end of the hydrolysis tower (2) is provided with a bypass pipeline (4), the input end of the bypass pipeline (4) is communicated with the vertical tower body (1), and the output end of the bypass pipeline (4) is communicated with the desulfurization tower (3).
5. The novel blast furnace gas desulfurization system according to claim 4, characterized in that: the desulfurization tower (3) adopts a dry adsorption method, coal gas passes through a dust intercepting device (11), a dry dechlorinating device (12) and a hydrolysis tower (2), organic sulfur is hydrolyzed into inorganic sulfur by the hydrolysis tower (2), and the inorganic sulfur is removed by the desulfurization tower (3).
6. The novel blast furnace gas desulfurization system according to claim 5, characterized in that: the coal gas passes through a dust intercepting device (11) and a dry-method dechlorinating device (12) and is conveyed into a desulfurizing tower (3) through a bypass pipeline (4), and organic sulfur and inorganic sulfur are simultaneously removed from the desulfurizing tower (3).
7. The novel blast furnace gas desulfurization system according to claim 1, characterized in that: the auxiliary desulfurization and dehydration device (5) is divided into an upper tower section and a lower tower section, the upper section is an auxiliary desulfurization section (51), the lower section is a dehydration section (52), a nozzle is arranged in the auxiliary desulfurization section (51), and when the outlet H of the desulfurization tower is connected2When the S content is detected to be still higher, a nozzle in the auxiliary desulfurization section (51) is opened to further desulfurize the coal gas, and the coal gas finally enters a dehydration section (52) to remove mechanical water and then enters a pipe network system.
8. The novel blast furnace gas desulfurization system according to claim 1, characterized in that: a TRT or pressure regulating valve bank is arranged between the desulfurizing tower (3) and the hydrolysis tower (2).
CN202010964572.7A 2020-09-15 2020-09-15 Novel blast furnace gas desulfurization system Pending CN111944563A (en)

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Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN113186001A (en) * 2021-04-07 2021-07-30 新兴铸管股份有限公司 Blast furnace gas fine desulfurization system
CN113293032A (en) * 2021-05-28 2021-08-24 中冶华天南京工程技术有限公司 Blast furnace gas dry dechlorination and hydrolysis conversion integrated tower with heat exchange coil
CN113509815A (en) * 2021-04-19 2021-10-19 中冶长天国际工程有限责任公司 Method for regulating and controlling circulation quantity of activated carbon in sintering flue gas multi-pollutant treatment
CN113584241A (en) * 2021-08-04 2021-11-02 上海大学 Dry-method simultaneous desulfurization and dechlorination system and method for blast furnace gas
CN114164025A (en) * 2021-11-03 2022-03-11 北京铝能清新环境技术有限公司 Blast furnace gas fine desulfurization method
CN114181742A (en) * 2021-11-11 2022-03-15 北京铝能清新环境技术有限公司 Blast furnace gas source treatment system
CN114196448A (en) * 2022-02-16 2022-03-18 北京中航天业科技有限公司 Full-flow dry type blast furnace gas fine desulfurization system and method

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN113186001A (en) * 2021-04-07 2021-07-30 新兴铸管股份有限公司 Blast furnace gas fine desulfurization system
CN113509815A (en) * 2021-04-19 2021-10-19 中冶长天国际工程有限责任公司 Method for regulating and controlling circulation quantity of activated carbon in sintering flue gas multi-pollutant treatment
CN113293032A (en) * 2021-05-28 2021-08-24 中冶华天南京工程技术有限公司 Blast furnace gas dry dechlorination and hydrolysis conversion integrated tower with heat exchange coil
CN113584241A (en) * 2021-08-04 2021-11-02 上海大学 Dry-method simultaneous desulfurization and dechlorination system and method for blast furnace gas
CN114164025A (en) * 2021-11-03 2022-03-11 北京铝能清新环境技术有限公司 Blast furnace gas fine desulfurization method
CN114181742A (en) * 2021-11-11 2022-03-15 北京铝能清新环境技术有限公司 Blast furnace gas source treatment system
CN114196448A (en) * 2022-02-16 2022-03-18 北京中航天业科技有限公司 Full-flow dry type blast furnace gas fine desulfurization system and method

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