CN111686560A - Sintering machine head smoke whitening technology - Google Patents

Sintering machine head smoke whitening technology Download PDF

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CN111686560A
CN111686560A CN202010692084.5A CN202010692084A CN111686560A CN 111686560 A CN111686560 A CN 111686560A CN 202010692084 A CN202010692084 A CN 202010692084A CN 111686560 A CN111686560 A CN 111686560A
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flue gas
pipe
cooling tower
machine head
sintering machine
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陆昌国
刘杭
杨洋
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Suzhou Zhonghuan Jianke Environmental Technology Co ltd
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Suzhou Zhonghuan Jianke Environmental Technology Co ltd
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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
    • B01D53/26—Drying gases or vapours
    • B01D53/265—Drying gases or vapours by refrigeration (condensation)
    • 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
    • B01D53/50—Sulfur oxides
    • 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
    • B01D53/60—Simultaneously removing sulfur oxides and nitrogen oxides
    • 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
    • B01D53/75—Multi-step processes
    • 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
    • B01D53/76—Gas phase processes, e.g. by using aerosols
    • 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
    • B01D53/74—General processes for purification of waste gases; Apparatus or devices specially adapted therefor
    • B01D53/86—Catalytic processes
    • B01D53/8621—Removing nitrogen compounds
    • B01D53/8625—Nitrogen oxides
    • B01D53/8631—Processes characterised by a specific device
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23J—REMOVAL OR TREATMENT OF COMBUSTION PRODUCTS OR COMBUSTION RESIDUES; FLUES 
    • F23J15/00—Arrangements of devices for treating smoke or fumes
    • F23J15/06—Arrangements of devices for treating smoke or fumes of coolers
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23J—REMOVAL OR TREATMENT OF COMBUSTION PRODUCTS OR COMBUSTION RESIDUES; FLUES 
    • F23J15/00—Arrangements of devices for treating smoke or fumes
    • F23J15/08—Arrangements of devices for treating smoke or fumes of heaters
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D2251/00—Reactants
    • B01D2251/10—Oxidants
    • B01D2251/104—Ozone
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D2251/00—Reactants
    • B01D2251/30—Alkali metal compounds
    • B01D2251/304—Alkali metal compounds of sodium
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D2251/00—Reactants
    • B01D2251/60—Inorganic bases or salts
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D2251/00—Reactants
    • B01D2251/60—Inorganic bases or salts
    • B01D2251/602—Oxides
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D2251/00—Reactants
    • B01D2251/60—Inorganic bases or salts
    • B01D2251/606—Carbonates
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D2251/00—Reactants
    • B01D2251/60—Inorganic bases or salts
    • B01D2251/608—Sulfates
    • 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
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E20/00—Combustion technologies with mitigation potential
    • Y02E20/30—Technologies for a more efficient combustion or heat usage

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  • Engineering & Computer Science (AREA)
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Abstract

The invention relates to a sintering machine head flue gas whitening eliminating process which sequentially comprises a primary cooling tower, a booster fan, a second cooling tower, a desulfurizing tower, a flue gas condenser, an MGGH system, a chimney, a flue gas condensing tower communicated with the flue gas condenser, and a circulating system arranged between the MGGH system and the second cooling tower, wherein the circulating system is used for communicating the second cooling tower with the MGGH system. The flue gas treated by the flue gas white-removing system not only recycles the waste heat of the flue gas, but also can effectively reduce pollutants in the discharged flue gas; the smoke whitening system not only eliminates visual pollution in the smoke discharging process, but also purifies smoke and reduces the content of smoke discharge pollutants; user's demand and economic benefits are considered comprehensively, and the overall arrangement is more reasonable, and the setting is more nimble.

Description

Sintering machine head smoke whitening technology
Technical Field
The invention relates to a flue gas whitening system, in particular to a sintering machine head flue gas whitening process.
Background
In the steel industry or other industrial production, flue gas generated by combustion between raw materials and fuel contains a large amount of nitrogen oxides, sulfur dioxide and particulate matters, and causes certain pollution to the atmosphere. The Chinese published in 2018 and 5 months, "iron and steel enterprises in ultralow emission reconstruction working schemes (comments on comments)", and the "comments on the state that iron and steel enterprises in various regions need to perform ultralow emission reconstruction step by step, wherein the hourly average emission concentrations of particulate matters, sulfur dioxide and nitrogen oxides are respectively not higher than 10, 35 and 50/m 3 under the condition that the reference oxygen content is 16%. The method for removing nitrogen oxides in sintering flue gas in the steel industry mainly comprises a reduction method, an oxidation method and a decomposition method. SNCR (non-selective catalytic reduction) and SCR (selective catalytic reduction) in reduction processes are considered to be the most effective denitration techniques, and are able to meet stringent flue gas emission standards. At present, the sintering flue gas temperature of a steel enterprise is generally 120-160 ℃, the temperature of the sintering flue gas is not in the temperature range of SNCR and SCR reaction windows, but the sintering flue gas temperature can be increased to 280-320 ℃ by a GGH (flue gas-flue gas reheater) with less energy consumption, and the temperature reaches the temperature of the medium-temperature SCR reaction window. Under the condition of the temperature, reducing agent ammonia is sprayed into the flue gas, and the ammonia reacts with NOx in the flue gas under the action of a catalyst to generate nontoxic and pollution-free N2 and H2O, so that the aim of removing the NOx is fulfilled.
The method for removing sulfur dioxide mainly comprises a wet method, a dry method and a semi-dry method, wherein the wet method mainly comprises a limestone-gypsum method, an ammonia method, a magnesium oxide method, a double-alkali washing method and the like. The sintering flue gas wet desulphurization technology is mature and is applied more frequently by a calcium method and an ammonia method, wherein the ammonia desulphurization efficiency can reach more than 98%, ammonia water is used as an absorbent, and a mixed solution of (NH4)2SO3, (NH4)2SO4 and NH3HSO3 is used for circularly absorbing SO2, SO that the purpose of removing SO2 is achieved. And (4) enabling the ammonium sulfate solution with a certain concentration obtained by desulfurization to enter an ammonium sulfate preparation system, and obtaining a finished product of ammonium sulfate through processes of evaporation, crystallization, drying and the like.
The method for removing the particles after desulfurization mainly comprises the steps of adding a high-efficiency demister, cooling and condensing, a wet electric dust remover and the like, and liquid drops and particles carried in the desulfurization flue gas are collected by a passive or active physical method, so that the purpose of removing the particles is achieved.
However, the existing sintering flue gas desulfurization and denitration technology has high energy consumption, and the flue gas discharged into the atmosphere emits white smoke.
Disclosure of Invention
The invention aims to provide a sintering machine head smoke whitening process.
The technical purpose of the invention is realized by the following technical scheme: the utility model provides a sintering machine head flue gas white elimination technology, includes primary cooling tower, booster fan, second cooling tower, desulfurizing tower, flue gas condenser, MGGH system, chimney in proper order, still includes the flue gas condensing tower with flue gas condenser intercommunication, still includes the circulation system that sets up between MGGH system and second cooling tower, the circulation system is with the second cooling tower and the MGGH in the system intercommunication.
Preferably, the primary cooling tower is made of ND steel, and the second cooling tower is made of fluoroplastic.
Preferably, the circulating system is made of fluoroplastic materials.
Preferably, the desulfurizing tower comprises a desulfurizing and denitration pipe arranged at the bottom and an oxidation-reduction cavity arranged at the top, and a desulfurizing agent and a denitration agent are arranged in the desulfurizing and denitration pipe.
Preferably, the desulfurizing agent comprises sodium carbonate aqueous solution, sodium sulfite solution and sodium dodecyl sulfate.
Preferably, the nitrate removing agent comprises copper sulfate solution, ferrous sulfate solution, sodium sulfate solution and TiO2-AL2O 3.
Preferably, the desulfurizing agent comprises 5-8 parts of sodium carbonate aqueous solution, 5-8 parts of sodium sulfite solution and 1-3 parts of sodium dodecyl sulfate; the nitrate removing agent comprises 5-10 parts of copper sulfate solution, 5-10 parts of ferrous sulfate solution, 3-5 parts of sodium sulfate solution and 1-2 parts of TiO2-AL2O 3.
Preferably, the desulfurization and denitration pipe comprises a flue gas inlet pipe, a desulfurization pipe and a denitration pipe, wherein the desulfurization pipe and the denitration pipe are symmetrically arranged, and an included angle of 120 degrees is formed between the adjacent pipe bodies.
Preferably, a gas pipe is arranged in the oxidation-reduction cavity, one end of the gas pipe is inserted into the desulfurization and denitration pipe, and a gas baffle plate is arranged between the flue gas inlet pipe and the gas pipe.
In conclusion, the invention has the following beneficial effects:
1. the flue gas treated by the flue gas white-removing system not only recycles the waste heat of the flue gas, but also can effectively reduce pollutants in the discharged flue gas;
2. the smoke whitening system not only eliminates visual pollution in the smoke discharging process, but also purifies smoke and reduces the content of smoke discharge pollutants;
3. user's demand and economic benefits are considered comprehensively, and the overall arrangement is more reasonable, and the setting is more nimble.
Drawings
FIG. 1 is a flow chart of the overall structure in example 1;
FIG. 2 is a sectional view of a part of the structure in embodiment 1.
In the figure, 11, a primary cooling tower; 12. a booster fan; 13. a second cooling tower; 14. a desulfurizing tower; 15. a flue gas condenser; 16. an MGGH system; 17. a chimney; 18. a flue gas condensing tower; 181. a desulfurization and denitration pipe; 182. a redox chamber; 183. a gas delivery pipe; 18. a desulfurization pipe and a gas baffle; 185. a denitration tube; 186. a gas baffle plate.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings.
The present embodiment is only for explaining the present invention, and it is not limited to the present invention, and those skilled in the art can make modifications of the present embodiment without inventive contribution as needed after reading the present specification, but all of them are protected by patent law within the scope of the claims of the present invention.
Example 1:
a sintering machine head flue gas whitening process sequentially comprises a primary cooling tower 11, a booster fan 12, a second cooling tower 13, a desulfurizing tower 14, a flue gas condenser 15, an MGGH system 16, a chimney 17, a flue gas condensing tower 18 communicated with the flue gas condenser 15, and a circulating system arranged between the MGGH system 16 and the second cooling tower 13, wherein the circulating system is used for communicating the second cooling tower 13 with the MGGH system 16, as shown in figure 1.
As shown in fig. 1, ND steel is used for the primary cooling tower 11, and fluoroplastic is used for the secondary cooling tower 13.
As shown in figure 1, the circulating system is made of fluoroplastic materials.
As shown in fig. 1 and 2, the desulfurization tower 18 includes a desulfurization and denitrification pipe 181 disposed at the bottom and a redox chamber 182 disposed at the top, and the desulfurization and denitrification pipe 181 is provided with a desulfurizing agent and a denitrification agent.
The desulfurizing agent comprises 5-8 parts of sodium carbonate aqueous solution, 5-8 parts of sodium sulfite solution and 1-3 parts of sodium dodecyl sulfate; the nitrate removing agent comprises 5-10 parts of copper sulfate solution, 5-10 parts of ferrous sulfate solution, 3-5 parts of sodium sulfate solution and 1-2 parts of TiO2-AL2O 3.
The desulfurizer utilizes oxidation reaction to carry out oxidation precipitation on sulfur dioxide in flue gas, the denitration agent generates hydroxide precipitate through the reaction of copper sulfate, ferric sulfate and nitride and is attached to the gas baffle 186, and the TiO2-AL2O3 is a fixed substance, can play a role of a catalyst for acceleration, and can also be used as an attachment to enable the formed precipitate to be attached to the surface.
As shown in fig. 1 and 2, the desulfurization and denitration tube 18 comprises a flue gas inlet tube 183, a desulfurization tube 184 and a denitration tube 185, the desulfurization tube 184, the denitration tube 185 and the flue gas inlet tube 183 are symmetrically arranged, and the adjacent tube bodies form an included angle of 120 degrees.
As shown in fig. 1 and 2, a gas pipe 187 is disposed in the oxidation-reduction chamber 182, one end of the gas pipe 187 is inserted into the desulfurization and denitrification pipe 182, a gas baffle 186 is disposed between the flue gas inlet pipe 183 and the gas pipe 187, and the oxidation-reduction chamber 182 can continuously introduce oxidizing gas, such as oxygen, ozone, and the like, and can be slightly heated to accelerate the reaction process.
The working principle is as follows:
the flue gas passes through the cooling tower 11 and the second cooling tower 13 in sequence for cooling, the booster fan 12 is arranged between the cooling towers 11, and when the flue gas passes through the cooling tower 11, the temperature of the flue gas is reduced to 110-135 ℃ from 185 ℃, so that the temperature of the flue gas is always above the acid dew point. The heat released by cooling the flue gas can be supplied to 70 ℃ heat supply backwater and the temperature is raised to 90 ℃ for supplying water to a heat removal net.
The water side of the second cooling tower 13 and the reheating section is a closed circulation system which mainly comprises a cooling II section heat exchanger, a flue gas reheater, a heat medium circulating water pump and a water supplementing and pressure stabilizing system, wherein the heat medium water is desalted water. The heat exchanger water side passes through the pipe connection, utilizes heat medium water circulation's flow, and the heat of absorbing the preceding high temperature flue gas of desulfurizing tower is used for heating clean flue gas: the heat medium water flows through the inside of the pipe, the flue gas flows through the outside of the pipe, the raw flue gas is cooled through the dividing wall type heat exchange, and the heat medium water is heated and conveyed to the reheater part through the circulating pump, so that the clean flue gas is heated to the required temperature.
13 sections of heat exchangers of second cooling tower arrange the flue between booster fan export and absorption tower entry, and in order to keep desulfurizing tower water balance and flue gas reheating section effect, 13 sections of export cigarette temperatures of second cooling tower should not hang down excessively, design MGGH cooling II section and continue to cool down the flue gas to 90 ℃. The heat medium water absorbs heat at the raw flue gas side, and then is conveyed to the clean flue gas side by the heat medium water circulating pump to be released, so that the temperature of the clean flue gas is raised to be more than 60 ℃ from 45 ℃/48 ℃.
In examples 1 to 6, the contents of the respective components in the desulfurizing agent and the denitrification agent are as follows;
example 1:
Figure BDA0002589664660000061
Figure BDA0002589664660000071
the concentrations of the sodium carbonate aqueous solution, the sodium sulfite aqueous solution, the copper sulfate solution, the ferrous sulfate solution and the sodium sulfate solution are respectively 56%, 32%, 42%, 45% and 15%.
The flue gas with the sulfur content and the nitrogen content of 18 percent and 12 percent respectively is introduced into the device, the desulfurizer and the denitrifier in the embodiments 1 to 6 are sequentially introduced, the flue gas at the outlet is detected, the sulfur content and the nitrogen content are detected, and the detection results are shown as follows.
Sulfur content (%) Nitrogen content (%)
Example 1 2 1
Example 2 1 3
Example 3 1 2
Example 4 1 0
Example 5 2 1
Example 6 1 2
After the flue gas passes through the device, most of sulfide and nitride in the flue gas are removed, but a small amount of residue still exists, but the flue gas reaches the emission standard, and the flue gas is circularly introduced into the device for many times, so that the sulfide content and the nitride content in the flue gas can be further reduced.
The flue gas that has handled through flue gas white system both recycle the flue gas waste heat, can effectively reduce the pollutant in discharging fume again.
The smoke whitening system not only eliminates visual pollution in the smoke discharging process, but also purifies smoke and lowers the content of smoke discharge pollutants.
User's demand and economic benefits are considered comprehensively, and the overall arrangement is more reasonable, and the setting is more nimble.
When the flue gas passes through the desulfurizing tower, the flue gas passes through the desulfurizing and denitration pipe 181 and then passes through the redox cavity 182, in the desulfurizing and denitration pipe 181, the flue gas enters through the flue gas inlet pipe 183, the desulfurizing agent and the denitration agent meet the flue gas through the desulfurizing pipe 184 and the denitration pipe 185 respectively, the flue gas has a certain temperature, which is equivalent to a micro-heating environment, the desulfurizing agent and the denitration agent can initially react with sulfides and nitrated compounds in the flue gas, the fixed substances generated by the reaction are attached to the gas baffle 186, the rest of the flue gas continues to move upwards and passes through the gas pipe 183 to be subjected to redox cavity, the continuous ozone is introduced into the redox cavity and heated, and the flue gas is further desulfurized and denitrated.

Claims (9)

1. A sintering machine head smoke whitening technology is characterized in that: the cooling tower comprises a primary cooling tower (11), a booster fan (12), a second cooling tower (13), a desulfurizing tower (14), a flue gas condenser (15), an MGGH system (16) and a chimney (17) in sequence, and further comprises a flue gas condensing tower (18) communicated with the flue gas condenser (15), and a circulating system arranged between the MGGH system (16) and the second cooling tower (13), wherein the circulating system is communicated with the second cooling tower (13) and the MGGH system (16).
2. The process for eliminating white smoke of a sintering machine head as claimed in claim 1, wherein the process comprises the following steps: the primary cooling tower (11) is made of ND steel, and the second cooling tower (13) is made of fluoroplastic.
3. The process for eliminating white smoke of a sintering machine head as claimed in claim 2, wherein: the circulating system is made of fluoroplastic materials.
4. The process for eliminating white smoke of a sintering machine head as claimed in claim 3, wherein: the desulfurizing tower (18) comprises a desulfurizing and denitration pipe (181) arranged at the bottom and an oxidation-reduction cavity (182) arranged at the top, wherein a desulfurizing agent and a denitration agent are arranged in the desulfurizing and denitration pipe (181).
5. The process for eliminating white smoke of a sintering machine head as claimed in claim 4, wherein the process comprises the following steps: the desulfurizing agent comprises a sodium carbonate aqueous solution, a sodium sulfite solution and sodium dodecyl sulfate.
6. The process for eliminating white smoke of a sintering machine head as claimed in claim 5, wherein the process comprises the following steps: the nitrate removing agent comprises copper sulfate solution, ferrous sulfate solution, sodium sulfate solution and TiO2-AL2O3。
7. The process for eliminating white smoke of a sintering machine head as claimed in claim 6, wherein: the desulfurizer comprises 5-8 parts of sodium carbonate aqueous solution, 5-8 parts of sodium sulfite solution and 1-3 parts of sodium dodecyl sulfate; the nitrate removing agent comprises 5-10 parts of copper sulfate solution, 5-10 parts of ferrous sulfate solution, 3-5 parts of sodium sulfate solution and 1-2 parts of TiO2-AL2O3。
8. The process of claim 7, wherein the process comprises the following steps: the desulfurization denitration pipe (18) comprises a flue gas inlet pipe (183), a desulfurization pipe (184) and a denitration pipe (185), wherein the desulfurization pipe (184), the denitration pipe (185) and the flue gas inlet pipe (183) are symmetrically arranged, and an included angle of 120 degrees is formed between adjacent pipe bodies.
9. The process for eliminating white smoke of a sintering machine head as claimed in claim 8, wherein: be provided with gas-supply pipe (183) in redox chamber (182), peg graft in desulfurization denitration pipe (182) gas-supply pipe (183) one end, the flue gas lets in and still is provided with air baffle (186) between pipe (183) and gas-supply pipe (183).
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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN114396634A (en) * 2022-02-15 2022-04-26 浙江连成环保科技有限公司 High-temperature flue gas purification and white waste heat elimination recovery system

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CN107456856A (en) * 2017-08-31 2017-12-12 哈尔滨工程大学 One kind is based on seawater method ship tail gas desulfurization and denitrification integral removal device and method
CN208660405U (en) * 2018-07-16 2019-03-29 东方电气集团东方锅炉股份有限公司 A kind of coal-fired power station boiler flue gas white-smoke-removing system tower-coupled with cooling
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Application publication date: 20200922