CN115253606A - Comprehensive hazardous waste incineration flue gas treatment method - Google Patents

Comprehensive hazardous waste incineration flue gas treatment method Download PDF

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CN115253606A
CN115253606A CN202210979970.5A CN202210979970A CN115253606A CN 115253606 A CN115253606 A CN 115253606A CN 202210979970 A CN202210979970 A CN 202210979970A CN 115253606 A CN115253606 A CN 115253606A
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flue gas
magnesium
washing
treated
washing tower
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周赞
陈军
季金飞
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Wuxi Xuelang Environmental Technology Co Ltd
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Wuxi Xuelang 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
    • B01D53/14—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 absorption
    • B01D53/1456—Removing acid components
    • 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
    • B01D53/14—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 absorption
    • B01D53/18—Absorbing units; Liquid distributors therefor
    • B01D53/185—Liquid distributors
    • 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
    • B01D53/38—Removing components of undefined structure
    • B01D53/40—Acidic components
    • 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
    • B01D53/501—Sulfur oxides by treating the gases with a solution or a suspension of an alkali or earth-alkali or ammonium compound
    • B01D53/504—Sulfur oxides by treating the gases with a solution or a suspension of an alkali or earth-alkali or ammonium compound characterised by a specific device
    • 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
    • B01D53/77—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
    • B01D53/77—Liquid phase processes
    • B01D53/79—Injecting reactants
    • 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
    • B01D53/80—Semi-solid phase processes, i.e. by using slurries
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F1/00—Treatment of water, waste water, or sewage
    • C02F1/66—Treatment of water, waste water, or sewage by neutralisation; pH adjustment
    • 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
    • B01D2251/40—Alkaline earth metal or magnesium compounds
    • B01D2251/402—Alkaline earth metal or magnesium compounds of magnesium
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D2251/00—Reactants
    • B01D2251/60—Inorganic bases or salts
    • B01D2251/604—Hydroxides
    • 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
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F2103/00—Nature of the water, waste water, sewage or sludge to be treated
    • C02F2103/18—Nature of the water, waste water, sewage or sludge to be treated from the purification of gaseous effluents

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Environmental & Geological Engineering (AREA)
  • Oil, Petroleum & Natural Gas (AREA)
  • Analytical Chemistry (AREA)
  • General Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Health & Medical Sciences (AREA)
  • Biomedical Technology (AREA)
  • Water Supply & Treatment (AREA)
  • Hydrology & Water Resources (AREA)
  • Organic Chemistry (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Treating Waste Gases (AREA)

Abstract

The invention provides a comprehensive hazardous waste incineration flue gas treatment method which can reduce the operation cost of a system on the premise of ensuring that the incineration flue gas of comprehensive hazardous waste reaches the emission standard. Which comprises the following steps: s1: carrying out water washing treatment on the flue gas to be treated through a water washing process, and removing halides; s2: the smoke to be treated after halide removal is sent to a magnesium desulphurization process to carry out deacidification treatment on sulfur dioxide in the smoke; s3: the flue gas to be treated after deacidification enters an alkaline washing procedure to further purify acidic pollutants in the flue gas; s4: sending the acid-containing wastewater generated in the step S1 into an alkaline washing process in the step S3 for neutralization reaction to obtain halide salts; s5: sending the magnesium sulfate brine generated in the step S2 into an evaporation process, and evaporating to obtain a magnesium sulfate product; s6: and (4) sending the sodium salt-containing wastewater generated in the step (S3) to an evaporation process, evaporating to obtain sodium miscellaneous salt, and performing rigid landfill.

Description

Comprehensive hazardous waste incineration flue gas treatment method
Technical Field
The invention relates to the technical field of flue gas purification, in particular to a comprehensive hazardous waste incineration flue gas treatment method.
Background
Industrial solid wastes, particularly comprehensive hazardous wastes, are various in types and complex in components, and the flue gas generated after high-temperature incineration often contains more halides (such as chlorine, fluorine, bromine, iodine and the like), when the flue gas is purified, a wet deacidification process is generally adopted, such as a sodium-alkali method or a lime-gypsum method, because halides and oxysulfide exist in the flue gas, in the wet deacidification process, the pollutants are simultaneously subjected to neutralization reaction with an alkaline deacidification agent, and complex-component composite salt-containing wastewater is formed in a washing solution; in the prior art, salt is generally separated by means of evaporation and the like for treating salt-containing wastewater, and the generated miscellaneous salt cannot be recycled due to complex types, and only can be selectively sent to a rigid landfill site for landfill, so that the treatment cost is high and a large amount of land is occupied. At the same time, SO is in the flue gas generated by burning the dangerous waste 2 The content (dry basis conversion) is up to 15000 to 20000mg/m 3 If the cost of the medicament treated by the sodium-alkali method is high and the subsequent products cannot be recycled, the treatment cost of the secondary waste is high; if the lime gypsum method is selected, the SO in the inlet flue gas is generally 2 The content (dry basis conversion) cannot be higher than 12000mg/m 3 And because the smoke contains halide, calcium halide generated by the reaction of the halide and lime is mixed into gypsum, the gypsum has insufficient purity and is difficult to be subsequently recycled.
Disclosure of Invention
In order to solve the problem of overhigh treatment cost of treating the incineration flue gas of comprehensive hazardous waste based on the existing wet flue gas treatment facility and treatment method, the invention provides the comprehensive hazardous waste incineration flue gas treatment method, which can reduce the system operation cost on the premise of ensuring that the incineration flue gas of the comprehensive hazardous waste reaches the emission standard.
The technical scheme of the invention is as follows: a comprehensive treatment method for hazardous waste incineration flue gas is characterized by comprising the following steps:
s1: carrying out water washing treatment on the flue gas to be treated through a water washing process, and removing halides;
s2: the smoke to be treated after halide removal is sent to a magnesium desulphurization process to deacidify sulfur dioxide in the smoke;
s3: the flue gas to be treated after deacidification enters an alkaline washing procedure to further purify acidic pollutants in the flue gas;
s4: sending the acid-containing wastewater generated in the step S1 to the alkaline washing process in the step S3 for neutralization reaction to obtain halide salts;
s5: the magnesium sulfate brine generated in the step S2 is sent to an evaporation process, and a magnesium sulfate product is obtained after evaporation;
s6: and (4) sending the sodium salt-containing wastewater generated in the step (S3) to an evaporation process, evaporating to obtain sodium miscellaneous salt, and performing rigid landfill.
It is further characterized in that:
in the magnesium desulphurization process, magnesium hydroxide slurry and sulfur oxide are subjected to neutralization reaction;
in the alkaline washing procedure, a sodium hydroxide solution is used as a washing agent;
and sending the condensed water obtained in the evaporation step into the washing step to be used as washing water.
The invention provides a method for treating comprehensive hazardous waste incineration flue gas, which is characterized in that halide and oxysulfide in the flue gas to be treated are respectively removed in a water washing process and a magnesium desulphurization process, so that relatively less impurities in magnesium sulfate salt water formed in the magnesium desulphurization process are ensured, and a magnesium sulfate product with higher purity and quality can be obtained through further evaporation and crystallization, thereby realizing resource utilization and reducing the cost of secondary landfill. The alkaline method washing process carries out advanced treatment on acidic substances in the flue gas to be treated to ensure that the flue gas meets the emission standard, and meanwhile, the acid-containing wastewater generated in the washing process is neutralized, so that a treatment process is not required to be additionally arranged on the acid-containing wastewater generated in the washing process, and the operation cost of the system is reduced. Based on the technical scheme of the invention, even incineration flue gas with high SO2 content can be fully purified, halide is removed as far as possible after the treatment of a water washing process, most of oxysulfide occupying a larger proportion in the flue gas forms magnesium salt in a secondary magnesium desulphurization process, the purity of the magnesium salt can be recycled, a small amount of miscellaneous salt formed by the halide is remained, and through landfill treatment, on one hand, the magnesium sulfate salt obtains the benefit of recycling, on the other hand, the total landfill amount is reduced, and the operation cost of a system is reduced. Condensed water obtained in the evaporation process is sent to the washing process and used as washing water, so that the system operation cost is further reduced.
Drawings
FIG. 1 is a schematic structural diagram of a comprehensive hazardous waste incineration flue gas treatment system in the invention.
Detailed Description
As shown in figure 1, the invention comprises a comprehensive hazardous waste incineration flue gas treatment system, which is characterized by comprising: a first-stage water washing tower 1, a second-stage magnesium method washing tower 2 and a third-stage alkaline method washing tower 3 which are connected in sequence.
The primary water washing tower 1 comprises a water washing tower flue gas inlet 1-1, a washing water spray head 1-2 and a water washing tower flue gas outlet 1-5 which are sequentially arranged from bottom to top; washing flue gas to be treated in a primary washing tower 1 by using water as a washing medium, wherein an acid-containing wastewater outlet 1-3 arranged at the bottom of the primary washing tower 1 is communicated with a sodium hydroxide liquid circulating device 3-5 of a three-stage alkaline washing tower 3 through a solution liquid inlet 3-1; the flue gas outlet 1-5 of the water washing tower is communicated with the flue gas inlet 2-6 of the magnesium washing tower 2 of the secondary magnesium washing tower 2.
In the secondary magnesium method washing tower 2, a flue gas inlet 2-6 of the magnesium method washing tower, a magnesium hydroxide solution spray head 2-7, a demister 2-1 for the secondary magnesium method washing tower and a flue gas outlet 2-2 of the magnesium method washing tower are arranged from bottom to top in sequence; a flue gas outlet 2-2 of the magnesium method washing tower is communicated with a flue gas inlet 3-7 of an alkaline method washing tower 3 of the three-level alkaline method washing tower 3; the bottom of the second-level magnesium method washing tower 2 is respectively provided with a magnesium sulfate wastewater discharge port 2-4, and the magnesium sulfate wastewater discharge port 2-4 is communicated with an evaporation device (not marked in the figure). The second-level magnesium method washing tower 2 uses magnesium hydroxide slurry to perform neutralization reaction with sulfur oxides, and performs deacidification treatment on sulfur dioxide in the flue gas.
In the three-stage alkaline washing tower 3, an alkaline washing tower flue gas inlet 3-7, a flue gas delay structure 3-8, an alkaline spray head 3-6, a demister for the three-stage alkaline washing tower 3-4 and an alkaline washing tower flue gas outlet 3-3 are arranged in sequence from bottom to top; the alkali liquor spray heads 3-6 are communicated with the sodium hydroxide liquid circulating device 3-5 through pipelines; the alkali liquor inlet 3-9 is communicated with a sodium hydroxide liquid supply device (not marked in the figure); the bottom of the three-stage alkaline washing tower 3 is provided with a sodium-containing wastewater discharge port 3-2, and the sodium-containing wastewater discharge port 3-2 is communicated with an evaporation device (not marked in the figure). In the three-stage alkaline washing tower 3, a sodium hydroxide solution is used as a washing agent to carry out deep purification treatment on acidic pollutants in the flue gas.
During specific implementation, the smoke delay structure 3-8 is realized based on a packing layer and comprises a reticular interlayer structure and spherical packing filled between the reticular interlayer structures, smoke needs to pass through gaps of the spherical packing after entering the smoke delay structure, the smoke flowing speed is reduced, meanwhile, an alkali liquor spray head 3-6 on the upper portion of the smoke delay structure sprays sodium hydroxide solution into the smoke delay structure, and the sodium hydroxide solution permeates between the spherical packing and fully reacts with smoke to be treated. The invention ensures that the flue gas can fully react in the sodium hydroxide solution in the three-stage alkaline washing tower 3 through the flue gas time delay structure, and acid pollutants in the flue gas can be fully washed and removed.
Halide with relatively high solubility in the flue gas is washed in a first-stage water washing tower 1, and the formed acidic wastewater is sent to a downstream third-stage alkaline process washing tower 3 to be subjected to neutralization reaction with alkali liquor; the halide content in the flue gas washed by the primary washing tower 1 is greatly reduced, only sulfur dioxide is left as a main acidic pollutant, the flue gas is washed and removed by the secondary magnesium washing tower 2 based on a magnesium desulphurization method, impurities in the formed magnesium sulfate wastewater are less, and a magnesium sulfate product with higher purity and quality can be obtained by evaporation subsequently.
The condensed water discharge port of the evaporation device is communicated with the water inlet of the first-level washing tower 1, so that the operation cost of the system is further reduced.
In the second-level magnesium method washing tower 2 and the third-level alkaline method washing tower 3, a demister 2-1 for the second-level magnesium method washing tower and a demister 3-4 for the third-level alkaline method washing tower are respectively arranged at a flue gas outlet 2-2 of the magnesium method washing tower and the lower part of the flue gas outlet of the alkaline method washing tower, and a magnesium hydroxide solution carried in flue gas to be treated and sulfite and sulfate generated after reaction are filtered by the demister 2-1 for the second-level magnesium method washing tower, so that the magnesium content in the solution generated by the third-level alkaline method washing tower 3 is ensured to be low, and further, the waste salt component generated after evaporation of waste liquid of the third-level alkaline method washing tower 3 is ensured to be pure. The water content in the flue gas is reduced by the demister 3-4 for the three-level alkaline washing tower, and meanwhile, the sodium hydroxide solution in the flue gas and the sodium-containing miscellaneous salt generated after reaction are retained in the three-level alkaline washing tower 3, so that the discharged flue gas is ensured to meet the discharge standard.
The bottoms of the first-stage water washing tower 1, the second-stage magnesium method washing tower 2 and the third-stage alkaline method washing tower 3 are respectively provided with a liquid circulating device: the water washing tower circulating device 1-4, the magnesium hydroxide slurry circulating device 2-3 and the sodium hydroxide liquid circulating device 3-5 are respectively communicated with the washing water spray head 1-2, the magnesium hydroxide solution spray head 2-7 and the alkali liquor spray head 3-6 through a liquid circulating pump.
The method comprises the steps that an oxidation fan 2-5 and a stirrer 2-8 are arranged in a magnesium hydroxide slurry circulating device 2-3, sulfur in flue gas to be treated exists in the form of sulfur dioxide and sulfur trioxide in a running mode, the sulfur reacts with magnesium hydroxide solution sprayed by a magnesium hydroxide solution spray head 2-7 in the washing process to generate sulfite and sulfate, the oxidation fan 2-5 is arranged in the magnesium hydroxide slurry circulating device 2-3, air is doped into washing waste water, the mixture is stirred by the stirrer 2-8 and fully reacts, the sulfite and oxygen react to generate sulfate, the waste liquid is further guaranteed to be fed into an evaporation device, the obtained waste liquid is magnesium sulfate, the reaction of the sulfite is completed in the magnesium hydroxide slurry circulating device 2-3, an additional sulfite treatment structure is not needed, and the system structure is simplified.
In practical application, salinity detection devices are respectively installed in the water washing tower circulating device 1-4, the magnesium hydroxide slurry circulating device 2-3 and the sodium hydroxide liquid circulating device 3-5, a detection threshold value is preset, when the concentration of liquid in the liquid circulating device is lower than the detection threshold value, the liquid circulating device sends the liquid into a corresponding washing tower for reaction, and when the salinity detection device detects that the concentration of the liquid containing salt is higher than the detection threshold value, the liquid is respectively discharged into the next procedure through the acid-containing wastewater outlet 1-3, the magnesium sulfate wastewater discharge port 2-4 and the sodium-containing wastewater discharge port 3-2 for reaction.
The comprehensive hazardous waste incineration flue gas treatment method based on the comprehensive hazardous waste incineration flue gas treatment system is characterized by comprising the following steps of:
s1: sending the flue gas to be treated into a primary washing tower 1, and carrying out washing treatment through a washing process to remove halides;
s2: the smoke to be treated after halide removal is sent to a secondary magnesium method washing tower 2 to carry out a magnesium method desulfurization process, magnesium hydroxide slurry and sulfur oxide are subjected to neutralization reaction, and sulfur dioxide in the smoke is deacidified;
s3: the flue gas to be treated after deacidification treatment is sent into a three-level alkaline washing tower 3 for an alkaline washing process, and a sodium hydroxide solution is used as a washing agent for further purifying acidic pollutants in the flue gas;
s4: the acid-containing wastewater generated in the step S1 is sent to the alkaline washing procedure in the step S3 for neutralization reaction to obtain halide salts;
s5: the magnesium sulfate brine generated in the step S2 is sent to a subsequent evaporation device (not marked in the figure) for evaporation, and a magnesium sulfate product is obtained after evaporation;
s6: and (4) sending the sodium salt-containing wastewater generated in the step (S3) to an evaporation process, evaporating to obtain sodium miscellaneous salt, and performing rigid landfill.
The condensed water obtained in the evaporation process is sent to the washing process and used as washing water, so that the operation cost of the system is reduced.
In the technical scheme of the invention, the first-stage water washing tower takes water as a washing medium and mainly removes halides in the flue gas by washing. The second-level magnesium method washing tower mainly removes sulfur dioxide in flue gas by using magnesium hydroxide slurry as a medium. The third-stage alkaline washing tower takes sodium hydroxide solution as a medium and is mainly used for neutralizing acidic wastewater of the first-stage washing tower and deeply removing residual acidic pollutants in smoke at the outlet of the second-stage magnesium washing tower.
After the technical scheme of the invention is used, even in the flue gas generated after the comprehensive hazardous waste is combusted, the SO2 content (dry basis conversion) in the flue gas is as high as 17612.78mg/m < 3 >, after the flue gas is treated by the primary water washing tower, the oxysulfide occupying a larger proportion in the flue gas can be fully washed by the secondary magnesium washing tower, the formed salt impurities are less, the resource utilization can be realized, the filling amount of the miscellaneous salt formed by a small amount of halide is greatly reduced, on one hand, the magnesium sulfate salt obtains the benefit of resource utilization, on the other hand, the total filling amount is reduced, and the operation cost is reduced. Meanwhile, condensed water in the system is fully recycled, and the system operation cost is greatly reduced.

Claims (3)

1. A comprehensive treatment method for hazardous waste incineration flue gas is characterized by comprising the following steps:
s1: carrying out water washing treatment on the flue gas to be treated through a water washing process, and removing halides;
s2: the smoke to be treated after halide removal is sent to a magnesium desulphurization process to deacidify sulfur dioxide in the smoke;
s3: the flue gas to be treated after deacidification enters an alkaline washing procedure to further purify acidic pollutants in the flue gas;
s4: the acid-containing wastewater generated in the step S1 is sent to the alkaline washing procedure in the step S3 for neutralization reaction to obtain halide salts;
s5: the magnesium sulfate brine generated in the step S2 is sent to an evaporation process, and a magnesium sulfate product is obtained after evaporation;
s6: and (4) sending the sodium salt-containing wastewater generated in the step (S3) to an evaporation process, evaporating to obtain sodium miscellaneous salt, and performing rigid landfill.
2. The comprehensive hazardous waste incineration flue gas treatment method according to claim 1, characterized in that: in the magnesium desulfurization process, magnesium hydroxide slurry and oxysulfide are subjected to a neutralization reaction;
in the alkaline washing procedure, a sodium hydroxide solution is used as a washing agent.
3. The comprehensive dangerous waste incineration flue gas treatment method according to claim 1, characterized in that: and sending the condensed water obtained in the evaporation step into the washing step to be used as washing water.
CN202210979970.5A 2022-08-16 2022-08-16 Comprehensive hazardous waste incineration flue gas treatment method Pending CN115253606A (en)

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Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1102792A (en) * 1993-09-22 1995-05-24 吴羽化学工业株式会社 Method and apparatus for treating waste gas
CN204320061U (en) * 2014-12-02 2015-05-13 成都华西堂投资有限公司 A kind of reclaiming device realizing discarded object in flue gas purifying method
CN107008127A (en) * 2017-05-03 2017-08-04 江苏天楹环保能源成套设备有限公司 A kind of wet cleaning technique of plasma fusing fly ash tail gas
CN111644038A (en) * 2020-06-30 2020-09-11 湖南叶林环保科技有限公司 High-chlorine high-sulfur dust-containing flue gas treatment system and method
CN111780131A (en) * 2020-08-03 2020-10-16 无锡雪浪环境科技股份有限公司 High-chlorine dangerous waste incineration disposal system
CN114053837A (en) * 2021-11-29 2022-02-18 中国成达工程有限公司 Method for recovering hydrogen chloride gas in tail gas generated in incineration of chlorine-containing waste

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1102792A (en) * 1993-09-22 1995-05-24 吴羽化学工业株式会社 Method and apparatus for treating waste gas
CN204320061U (en) * 2014-12-02 2015-05-13 成都华西堂投资有限公司 A kind of reclaiming device realizing discarded object in flue gas purifying method
CN107008127A (en) * 2017-05-03 2017-08-04 江苏天楹环保能源成套设备有限公司 A kind of wet cleaning technique of plasma fusing fly ash tail gas
CN111644038A (en) * 2020-06-30 2020-09-11 湖南叶林环保科技有限公司 High-chlorine high-sulfur dust-containing flue gas treatment system and method
CN111780131A (en) * 2020-08-03 2020-10-16 无锡雪浪环境科技股份有限公司 High-chlorine dangerous waste incineration disposal system
CN114053837A (en) * 2021-11-29 2022-02-18 中国成达工程有限公司 Method for recovering hydrogen chloride gas in tail gas generated in incineration of chlorine-containing waste

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