CN108543416B - Treatment system for coking flue gas mixed with raw coke oven gas and construction process thereof - Google Patents
Treatment system for coking flue gas mixed with raw coke oven gas and construction process thereof Download PDFInfo
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- CN108543416B CN108543416B CN201810180013.XA CN201810180013A CN108543416B CN 108543416 B CN108543416 B CN 108543416B CN 201810180013 A CN201810180013 A CN 201810180013A CN 108543416 B CN108543416 B CN 108543416B
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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
- B01D53/02—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
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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
- B01D53/86—Catalytic processes
- B01D53/8603—Removing sulfur compounds
- B01D53/8612—Hydrogen sulfide
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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
- B01D53/86—Catalytic processes
- B01D53/8621—Removing nitrogen compounds
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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
- B01D53/86—Catalytic processes
- B01D53/8621—Removing nitrogen compounds
- B01D53/8634—Ammonia
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2257/00—Components to be removed
- B01D2257/40—Nitrogen compounds
- B01D2257/408—Cyanides, e.g. hydrogen cyanide (HCH)
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2257/00—Components to be removed
- B01D2257/70—Organic compounds not provided for in groups B01D2257/00 - B01D2257/602
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2257/00—Components to be removed
- B01D2257/70—Organic compounds not provided for in groups B01D2257/00 - B01D2257/602
- B01D2257/702—Hydrocarbons
- B01D2257/7027—Aromatic hydrocarbons
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2258/00—Sources of waste gases
- B01D2258/02—Other waste gases
- B01D2258/0283—Flue gases
Abstract
The invention discloses a treatment system for mixing raw coke oven gas into coking flue gas and a construction process thereof, belonging to the technical field of design and manufacture of metallurgical resource production accessory equipment. The treatment system for mixing the raw coke oven gas into the coking flue gas and the construction process thereof can effectively remove harmful substances in the coking flue gas. The treatment system comprises a cyanide complex treatment device and a sulfur and nitrate treatment device which are sequentially connected, wherein a mixed material of a cyanide compound and a complex compound is arranged in the cyanide complex treatment device, and a mixed material of a denitration treatment substance and a desulfurization treatment substance is arranged in the sulfur and nitrate treatment device; the cyanide complex treatment device is communicated with the lower part of the sulfur and nitrate treatment device through the lower part of the cyanide complex treatment device. The coking flue gas to be treated sequentially enters the cyanide complex treatment device and the sulfur and nitrate treatment device to remove harmful substances such as coal tar, benzene, naphthalene, complex cyanide, ammonium nitrogen, hydrogen sulfide and the like.
Description
Technical Field
The invention relates to a treatment system, in particular to a treatment system for mixing raw coke oven gas into coking flue gas, and belongs to the technical field of design and manufacture of metallurgical resource production auxiliary equipment. The invention also relates to a construction process for treating the coking flue gas by using the treatment system.
Background
At present, coking flue gas cannot be prevented from being mixed into raw gas due to equipment reasons. When raw gas components are mixed in the flue gas, both dry treatment and wet treatment are difficult to realize, and particularly, secondary water pollution is generated by the wet treatment. Therefore, how to remove harmful substances in the raw gas before dry and wet treatment becomes a technical problem which needs to be solved urgently by the technical personnel in the field.
Disclosure of Invention
The technical problem to be solved by the invention is as follows: the treatment system for mixing the raw coke oven gas into the coking flue gas can effectively remove harmful substances in the coking flue gas. The invention also provides a construction process for treating the coking flue gas by using the treatment system.
The technical scheme adopted for solving the technical problems is as follows: a treatment system for raw coke gas mixed in coking flue gas comprises a cyanogen complex treatment device and a sulfur and nitrate treatment device which are sequentially connected, wherein a mixed material of a cyanogen compound and a complex compound is arranged in the cyanogen complex treatment device, and a mixed material of a denitration treatment substance and a desulfurization treatment substance is arranged in the sulfur and nitrate treatment device; the device is characterized in that the cyanide complex treatment device is communicated with the lower part of the sulfur and nitrate treatment device through the lower part of the cyanide complex treatment device, a flue gas input interface is arranged at the middle upper part of the cyanide complex treatment device, and a flue gas output interface is arranged at the middle upper part of the sulfur and nitrate treatment device.
Further, the cyanogen complex treatment device also comprises a material circulating component, and the mixture material of cyanogen compound and complex compound arranged in the cyanogen complex treatment device is circularly replaced through the material circulating component.
In a preferred mode of the above embodiment, the mixture of the cyanide compound and the complex is a powder material containing an iron element and an adsorbent.
Further, the sulfur and nitrate treatment device also comprises the material circulating assembly, and the mixed material of the denitration treatment object and the desulfurization treatment object arranged in the sulfur and nitrate treatment device is independently and discontinuously circularly replaced through the material circulating assembly.
In a preferred embodiment of the above aspect, the mixed material of the denitration treatment substance and the desulfurization treatment substance is a fine powder containing a low-temperature catalyst.
Further, the mixed material of the cyanogen compound and the complex compound arranged in the cyanogen complex treatment device is powder with the mesh number more than 200; the mixed material of the denitration treatment substance and the desulfurization treatment substance in the sulfur and nitrate treatment device is arranged to be powder with the mesh number larger than 250.
The construction process for treating the coking flue gas by using the treatment system comprises the following steps,
firstly, adding a mixed material of a cyanogen compound and a complex compound into the cyanogen complex treatment device, adding a mixed material of a denitration treatment substance and a desulfurization treatment substance into the sulfur and nitrate treatment device, and adding a low-temperature catalyst into the mixed material of the denitration treatment substance and the desulfurization treatment substance; then the coking flue gas mixed with the raw gas is input into the treatment system and sequentially passes through the cyanogen complex treatment device and the sulfur and nitrate treatment device, so that coal tar, benzene and naphthalene in the coking flue gas mixed with the raw gas are adsorbed and removed through a mixture of cyanogen compounds and complex compounds, ammonium nitrogen impurities in the coking flue gas mixed with the raw gas are removed through reaction with a mixture of a denitration treatment substance and a desulfurization treatment substance, and finally the coking flue gas from the sulfur and nitrate treatment device is sent into an external desulfurization, denitrification and dust removal system to complete the treatment work of the coking flue gas,
wherein, the mixed material of cyanogen compound and complex arranged in the cyanogen complex processing device is independently and discontinuously circularly replaced through the material circulating component, and the mixed material of the denitration treatment substance and the desulfuration treatment substance arranged in the sulfur and nitrate processing device is independently and discontinuously circularly replaced through the material circulating component.
The invention has the beneficial effects that: this application is through setting up one set and including cyanogen complex processing apparatus and sulphur nitre processing apparatus's processing system, and will cyanogen complex processing apparatus and sulphur nitre processing apparatus communicate in proper order, then be in cyanogen complex processing apparatus in arranged the combined material of cyanogen compound and complex sulphur nitre processing apparatus in arranged the combined material of denitration treatment thing and desulfurization treatment thing. Therefore, when the coking flue gas is treated, only the coking flue gas mixed with the raw gas enters the cyanide complex treatment device and the sulfur and nitrate treatment device through the smoke tube in sequence and reacts with the mixed materials in the corresponding devices, harmful substances such as coal tar, benzene, naphthalene, complex cyanide, ammonium nitrogen, hydrogen sulfide and the like mixed with the coking flue gas due to the raw gas can be rapidly removed, the realization of desulfurization treatment on the tail gas by a dry method and a wet method in the subsequent process is ensured, and secondary water pollution generated by wet desulfurization treatment is avoided as much as possible.
Drawings
FIG. 1 is a schematic structural diagram of a treatment system for mixing raw coke gas into coking flue gas according to the present invention.
Labeled as: cyanide complex processing apparatus 1, sulphur nitre processing apparatus 2, flue gas input interface 3, flue gas output interface 4, material circulation subassembly 5.
Detailed Description
As shown in FIG. 1, the invention provides a treatment system for mixing raw coke oven gas into coking flue gas, which can effectively remove harmful substances in the coking flue gas, and a construction process for treating the coking flue gas by using the treatment system. The treatment system comprises a cyanide complex treatment device 1 and a sulfur and nitrate treatment device 2 which are sequentially connected, wherein a mixed material of a cyanide compound and a complex compound is arranged in the cyanide complex treatment device 1, and a mixed material of a denitration treatment substance and a desulfurization treatment substance is arranged in the sulfur and nitrate treatment device 2; the cyanide complex treatment device 1 is communicated with the lower part of the sulfur and nitrate treatment device 2 through the lower part of the cyanide complex treatment device, a flue gas input interface 3 is arranged at the middle upper part of the cyanide complex treatment device 1, and a flue gas output interface 4 is arranged at the middle upper part of the sulfur and nitrate treatment device 2. The construction process comprises the following steps of,
firstly, adding a mixed material of a cyanogen compound and a complex compound into the cyanogen complex treatment device 1, adding a mixed material of a denitration treatment object and a desulfurization treatment object into the sulfur and nitrate treatment device 2, and adding a low-temperature catalyst into the mixed material of the denitration treatment object and the desulfurization treatment object; then the coking flue gas mixed with the raw gas is input into the treatment system and sequentially passes through the cyanide complex treatment device 1 and the sulfur and nitrate treatment device 2, so that coal tar, benzene and naphthalene in the coking flue gas mixed with the raw gas are adsorbed and removed through a mixture of cyanide and a complex, ammonium nitrogen impurities in the coking flue gas mixed with the raw gas are removed through reaction with a mixture of a denitration treatment substance and a desulfurization treatment substance, and finally the coking flue gas coming out of the sulfur and nitrate treatment device 2 is sent into an external desulfurization system to complete the treatment work of the coking flue gas. This application is through setting up one set and including cyanogen complex processing apparatus and sulphur nitre processing apparatus's processing system, and will cyanogen complex processing apparatus and sulphur nitre processing apparatus communicate in proper order, then be in cyanogen complex processing apparatus in arranged the combined material of cyanogen compound and complex sulphur nitre processing apparatus in arranged the combined material of denitration treatment thing and desulfurization treatment thing. Therefore, when the coking flue gas is treated, only the coking flue gas mixed with the raw gas enters the cyanide complex treatment device and the sulfur and nitrate treatment device through the smoke tube in sequence and reacts with the mixed materials in the corresponding devices, harmful substances such as coal tar, benzene, naphthalene, complex cyanide, ammonium nitrogen, hydrogen sulfide and the like mixed with the coking flue gas due to the raw gas can be rapidly removed, the realization of desulfurization, denitrification and dust removal treatment on the tail gas by a dry method and a wet method in the subsequent process is ensured, and secondary water pollution generated by wet desulfurization treatment is avoided as much as possible.
In the above embodiment, in order to improve the ability of removing harmful substances such as coal tar, benzene, naphthalene, complex cyanide, ammonium nitrogen and hydrogen sulfide, which are mixed in the coking flue gas due to raw gas, as much as possible, the cyanide complex treatment device 1 and the sulfur and nitrate treatment device 2 are respectively provided with the material circulation component 5, so that in the treatment process, the mixture of cyanide and complex arranged in the cyanide complex treatment device 1 is separately and discontinuously cyclically replaced through the material circulation component 5, and the mixture of denitration treatment substance and desulfurization treatment substance arranged in the sulfur and nitrate treatment device 2 is separately and discontinuously cyclically replaced through the material circulation component 5. Specifically, the mixture of the cyanogen compound and the complex is powder containing iron element and an adsorbent; the mixed material of the denitration treatment substance and the desulfurization treatment substance is fine powder containing a low-temperature catalyst. Powder with the mesh number of the mixture of the cyanogen compound and the complex compound which is arranged in the cyanogen complex treatment device 1 is more than 200 meshes; the grain diameter of the mixed material of the denitration treatment substance and the desulfuration treatment substance in the sulfur and nitrate treatment device 2 is controlled to be powder with the mesh number larger than 250, so that the sufficiency of chemical reaction is ensured, and the cyclic replacement of the mixed material is facilitated.
Claims (6)
1. The utility model provides a processing system that is used for mixing into raw coke oven gas in coking flue gas which characterized in that: the treatment system comprises a cyanide complex treatment device (1) and a sulfur and nitrate treatment device (2) which are connected in sequence, wherein a mixed material of a cyanide complex is arranged in the cyanide complex treatment device (1), and a mixed material of a denitration treatment substance and a desulfurization treatment substance is arranged in the sulfur and nitrate treatment device (2); the cyanide complex treatment device (1) is communicated with the lower part of the sulfur and nitrate treatment device (2) through the lower part of the cyanide complex treatment device, a flue gas input interface (3) is arranged at the middle upper part of the cyanide complex treatment device (1), a flue gas output interface (4) is arranged at the middle upper part of the sulfur and nitrate treatment device (2),
wherein the mixed material of the cyanide complex is powder containing iron element and an adsorbent.
2. The treatment system for mixing raw coke oven gas into coking flue gas according to claim 1, characterized in that: the cyanide complex treatment device (1) further comprises a material circulating component (5), and the mixed material of the cyanide complexes arranged in the cyanide complex treatment device (1) is circularly replaced through the material circulating component (5).
3. The treatment system for mixing the raw coke oven gas into the coking flue gas as claimed in claim 2, wherein: the sulfur and nitrate treatment device (2) also comprises the material circulating component (5), and the mixed material of the denitration treatment substance and the desulfurization treatment substance arranged in the sulfur and nitrate treatment device (2) is independently and discontinuously circularly replaced through the material circulating component (5).
4. The treatment system for mixing the raw coke oven gas into the coking flue gas as claimed in claim 3, wherein: the mixed material of the denitration treatment substance and the desulfurization treatment substance is fine powder containing a low-temperature catalyst.
5. The treatment system for mixing raw coke oven gas into coking flue gas according to claim 1, 2, 3 or 4, characterized in that: the mixed material of the cyanide complex arranged in the cyanide complex treatment device (1) is powder with the mesh number more than 200; the mixed material of the denitration treatment substance and the desulfurization treatment substance in the sulfur and nitrate treatment device (2) is arranged to be powder with the mesh number larger than 250.
6. A construction process for treating coking flue gas by using the treatment system of claim 5, which is characterized in that: the construction process comprises the following steps of,
firstly, adding a mixed material of cyanide complexes into the cyanide complex treatment device (1), adding a mixed material of a denitration treatment object and a desulfurization treatment object into the sulfur and nitrate treatment device (2), and adding a low-temperature catalyst into the mixed material of the denitration treatment object and the desulfurization treatment object; then the coking flue gas mixed with the raw gas is input into the treatment system and sequentially passes through the cyanide complex treatment device (1) and the sulfur and nitrate treatment device (2), so that coal tar, benzene and naphthalene in the coking flue gas mixed with the raw gas are adsorbed and removed through a mixed material of cyanide complex, ammonium nitrogen impurities in the coking flue gas mixed with the raw gas are removed through reaction with a mixed material of a denitration treatment object and a desulfurization treatment object, and finally the coking flue gas from the sulfur and nitrate treatment device (2) is sent into an external desulfurization, denitrification and dust removal system to complete the treatment work of the coking flue gas,
wherein, the mixed material of cyanide complex arranged in the cyanide complex treatment device (1) is separately and discontinuously circularly replaced through the material circulating component (5), and the mixed material of denitration treatment substance and desulfurization treatment substance arranged in the sulfur and nitrate treatment device (2) is separately and discontinuously circularly replaced through the material circulating component (5).
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| CN201810180013.XA CN108543416B (en) | 2018-03-05 | 2018-03-05 | Treatment system for coking flue gas mixed with raw coke oven gas and construction process thereof |
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