CN112755744A - Flue gas purification method in hazardous waste incineration process - Google Patents
Flue gas purification method in hazardous waste incineration process Download PDFInfo
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- CN112755744A CN112755744A CN202011398850.3A CN202011398850A CN112755744A CN 112755744 A CN112755744 A CN 112755744A CN 202011398850 A CN202011398850 A CN 202011398850A CN 112755744 A CN112755744 A CN 112755744A
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- flue gas
- deacidification
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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
- B01D53/38—Removing components of undefined structure
- B01D53/40—Acidic components
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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
- B01D53/46—Removing components of defined structure
- B01D53/54—Nitrogen compounds
- B01D53/56—Nitrogen oxides
- B01D53/565—Nitrogen oxides by treating the gases with solids
-
- 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
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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
- B01D53/81—Solid phase processes
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- 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
- B01D2251/404—Alkaline earth metal or magnesium compounds of calcium
-
- 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
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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
- B01D2258/0291—Flue gases from waste incineration plants
Abstract
The invention discloses a flue gas purification method in a hazardous waste incineration process, which comprises the steps of conveying flue gas at an outlet of a secondary combustion chamber to a waste heat boiler, carrying out denitration in the boiler by adopting SNCR, setting the temperature of the flue gas at the outlet of the waste heat boiler to be 500-550 ℃, conveying the flue gas treated by the waste heat boiler to a deacidification chamber for deacidification, conveying the deacidified flue gas to a quench tower for quenching, deacidifying the quenched flue gas again, spraying active carbon, treating the flue gas by a bag-type dust collector, a pre-cooling tower and a deacidification tower in sequence, and finally discharging the treated flue gas through a chimney. The invention realizes the recycling of the high-salinity wastewater of the incineration line, does not need to use multi-effect evaporation equipment to treat the high-salinity wastewater, saves the investment cost of the multi-effect evaporation equipment and also reduces the comprehensive operation cost.
Description
Technical Field
The invention relates to the technical field of hazardous waste treatment flue gas purification, in particular to a flue gas purification method in a hazardous waste incineration process.
Background
At present, the dangerous waste (hazardous waste) incineration market has ended the market of the excessive reserve in the previous year, the high price market of dealing with, the current dangerous waste market volume price falls simultaneously, the dangerous waste incineration enterprise needs to improve the competitiveness of the dangerous waste incineration enterprise through the means of cost reduction and efficiency improvement, the first requirement of reducing the operation cost is the comprehensive consideration from the design angle, the operation cost of the dangerous waste incineration is reduced, the direct production cost of the dangerous waste incineration production operation mainly occurs in the flue gas purification process of the incineration process, so the development of an economic flue gas purification method in the dangerous waste incineration process is urgent.
Therefore, a new method for purifying flue gas in the incineration process of hazardous wastes needs to be provided.
Disclosure of Invention
The present invention has been made to solve the above problems. The invention provides a method for purifying flue gas in a hazardous waste incineration process, which overcomes the defect of higher comprehensive operation cost of the conventional method for purifying the flue gas in the hazardous waste incineration. The method for purifying flue gas in hazardous waste incineration process proposed by the present invention is briefly described below, and more details will be described in the following detailed description with reference to the attached drawings.
According to one aspect of the invention, a method for purifying flue gas in a hazardous waste incineration process is provided, and the method comprises the following steps: conveying the flue gas at the outlet of the secondary combustion chamber to a waste heat boiler, carrying out denitration in the boiler by adopting SNCR, conveying the flue gas treated by the waste heat boiler to a deacidification chamber for deacidification, conveying the flue gas after deacidification to a quench tower for quenching, then deacidifying the flue gas after quenching again and spraying active carbon, treating the flue gas by a bag-type dust remover, a pre-cooling tower and a deacidification tower in sequence, and finally discharging the treated flue gas through a chimney.
Further, the flue gas temperature at the flue gas outlet of the waste heat boiler is set to be 500-550 ℃.
Further, the flue gas output by the waste heat boiler is deacidified by a deacidification chamber, wherein the temperature and the humidity of the flue gas in the deacidification chamber are controlled by spraying industrial water, steam and partial high-salt wastewater into the deacidification chamber, the temperature is controlled to be 460-550 ℃, and the water content in the flue gas is controlled to be more than or equal to 5 wt.%.
Further, the flue gas output by the waste heat boiler is deacidified by a deacidification chamber, wherein the deacidification agent comprises slaked lime, and the specific surface area of the slaked lime is more than or equal to 35m2/g。
Furthermore, when the quenching tower is used for quenching, the quenching medium adopts a high-salinity wastewater back-spraying mode.
Further, the deacidification tower is only used under an emergency working condition, wherein the emergency working condition is a working condition when the treated hazardous waste material pollutant elements exceed a set threshold value.
Further, deacidifying the quenched flue gas again, wherein the deacidifying agent comprises slaked lime.
According to the method for purifying the flue gas in the hazardous waste incineration process, the generation of high-salt wastewater can be greatly reduced by slaked lime deacidification twice, and even under the condition of low content of acid gas, the high-salt wastewater cannot be generated; meanwhile, the disposal mode of back-spraying the high-salt wastewater to the quenching tower is combined, so that the high-salt wastewater of the incineration line can be completely recycled, the high-salt wastewater is not required to be treated by using multi-effect evaporation equipment, the investment cost of the multi-effect evaporation equipment is saved, and the comprehensive operation cost is also reduced.
Drawings
The above and other objects, features and advantages of the present invention will become more apparent by describing in more detail embodiments of the present invention with reference to the attached drawings. The accompanying drawings are included to provide a further understanding of the embodiments of the invention and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the principles of the invention and not to limit the invention. In the drawings, like reference numbers generally represent like parts or steps.
Fig. 1 shows a schematic flow diagram of a flue gas purification method in a hazardous waste incineration process according to an embodiment of the invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, exemplary embodiments according to the present invention will be described in detail below with reference to the accompanying drawings. It is to be understood that the described embodiments are merely a subset of embodiments of the invention and not all embodiments of the invention, with the understanding that the invention is not limited to the example embodiments described herein. All other embodiments, which can be derived by a person skilled in the art from the embodiments of the invention described herein without inventive step, shall fall within the scope of protection of the invention.
In order to provide a thorough understanding of the present application, a detailed structure will be presented in the following description in order to explain the technical solutions presented in the present application. Alternative embodiments of the present application are described in detail below, however, the present application may have other implementations in addition to these detailed descriptions.
The comprehensive treatment cost for purifying the flue gas in the hazardous waste incineration process mainly comprises medicament cost, ash cost, high-salinity wastewater treatment cost, waste salt treatment cost and the like. In the process of 'quench tower + dry deacidification + activated carbon injection + bag type dust removal + wet deacidification', slaked lime or sodium bicarbonate is adopted as a dry deacidification agent, if slaked lime is adopted as a denitration agent in the dry deacidification, the temperature is controlled to be 180-200 ℃, the deacidification efficiency of the slaked lime is only about 50%, more high-salinity wastewater can be generated, and the high-salinity wastewater needs to be further treated by multi-effect evaporation; if the dry deacidification is carried out by adopting the baking soda as the denitration agent, grinding and then spraying, the deacidification efficiency can reach over 90 percent, but the equipment investment cost and the operation cost of the baking soda are higher.
Therefore, the method for purifying the flue gas in the hazardous waste incineration process is economical and environment-friendly, the flue gas at the outlet of the secondary combustion chamber passes through a waste heat boiler, the SNCR furnace is adopted for denitration, the temperature of the flue gas at the outlet of the waste heat boiler is designed to be 500-550 ℃, the flue gas discharged from the waste heat boiler is deacidified in a deacidification chamber, then is quenched through a quenching tower, the quenched flue gas is deacidified again through slaked lime, activated carbon is sprayed, and the flue gas is dedusted through a cloth bag, passes through a pre-cooling tower and a deacidification tower and is finally discharged through a chimney.
The method for purifying flue gas in a hazardous waste incineration process of the invention is described in detail below with reference to fig. 1, and fig. 1 shows a schematic flow chart of the method for purifying flue gas in a hazardous waste incineration process according to an embodiment of the invention.
As shown in fig. 1, the method for purifying flue gas in a hazardous waste incineration process according to the embodiment of the invention comprises the following steps: conveying the flue gas at the outlet of the secondary combustion chamber to a waste heat boiler, carrying out denitration in the boiler by adopting SNCR, setting the temperature of the flue gas at the outlet of the flue gas of the waste heat boiler to be 500-550 ℃, conveying the flue gas treated by the waste heat boiler to a deacidification chamber for deacidification, conveying the flue gas subjected to deacidification to a quench tower for quenching, then deacidifying the flue gas subjected to quenching again and spraying activated carbon, treating the flue gas by sequentially passing through a bag-type dust collector, a pre-cooling tower and a deacidification tower, and finally discharging the treated flue gas through a chimney.
By way of example, selective non-catalytic reduction (SNCR) refers to the reduction of nitrogen oxides in flue gas to harmless nitrogen and water by injecting a reducing agent within a "temperature window" suitable for denitration without the action of a catalyst.
Specifically, the technology generally reduces NOx by injecting ammonia, urea or hydroammonia into a furnace as a reducing agent. The reductant reacts only with NOx in the flue gas and generally does not react with oxygen, and this technique does not employ a catalyst, so this method is referred to as selective non-catalytic reduction (SNCR). Since the process does not use a catalyst, the reducing agent must be added in the high temperature zone. And spraying the reducing agent into a region with the temperature of 850-1100 ℃ in the hearth, quickly thermally decomposing into NH3, and reacting with NOx in the flue gas to generate N2 and water.
For example, the illustrated waste heat boiler may employ any suitable boiler known to those skilled in the art and is not intended to be limiting herein.
For example, when flue gas output by the waste heat boiler is deacidified by the deacidification chamber, the temperature and the humidity of the flue gas in the deacidification chamber can be controlled by spraying industrial water, steam and partial high-salt wastewater into the deacidification chamber;
specifically, the temperature can be controlled at 460-550 ℃, and the water content in the flue gas is controlled to be greater than or equal to 5 wt.%.
Is exemplified byThe flue gas can be deacidified twice, wherein the deacidification agent comprises slaked lime, and the specific surface area of the slaked lime can be more than or equal to 35m2(ii)/g; the generation of high-salinity wastewater can be greatly reduced by two times of slaked lime deacidification.
Specifically, as shown in fig. 1, the deacidification agent refers to slaked lime 1 and slaked lime 2, wherein the slaked lime 1 is used for deacidification in the denitration chamber, and the slaked lime 2 is used for deacidification again of flue gas quenched by a quenching tower.
For example, when the quenching tower is used for quenching, the quenching medium can be sprayed back by high-salinity wastewater.
Illustratively, the deacidification tower is only used under an emergency working condition, wherein the emergency working condition is a working condition when the pollutant elements of the treated hazardous waste material exceed a set threshold value, specifically, the set threshold value can be a value artificially set according to actual conditions, and the set value can be adjusted according to different requirements, so that the flexibility and the adaptability of the flue gas purification method can be improved.
The flue gas is purified by the flue gas purification method in the hazardous waste incineration process, and the treatment scale of the hazardous waste containing pollutant element components is 100 tons/day as shown in Table 1. And (2) enabling the flue gas at the outlet of the secondary combustion chamber to pass through a waste heat boiler, carrying out denitration in an SNCR (selective non catalytic reduction) furnace, designing the temperature of the flue gas at the outlet of the waste heat boiler to be 500 ℃, deacidifying the flue gas discharged from the waste heat boiler through a deacidification chamber, then carrying out quenching through a quenching tower, deacidifying the quenched flue gas through slaked lime again, spraying activated carbon, carrying out bag dust removal, a pre-cooling tower and a deacidification tower, and finally discharging through a chimney. And the temperature of the flue gas is adjusted to be about 500 ℃ by adopting industrial water in the deacidification chamber, and the water content is more than 5 wt.%. The flue gas is purified by the flue gas purification method in the hazardous waste incineration process, and the emission requirements shown in the table 2 can be met.
TABLE 1 elemental mass content of hazardous waste furnace-entering pollutants
| Element(s) | N | S | CL | F | Br | Others |
| Content (wt.) | 2 | 1.5 | 4.5 | 0.3 | 0.1 | 91.6 |
TABLE 2 design values for flue gas emissions
Compared with the prior art, the invention can obtain the following beneficial effects:
(1) the method adopts the slaked lime for deacidification, has lower medicament cost compared with sodium bicarbonate, and can reduce the cost of flue gas purification.
(2) The invention provides a separate deacidification chamber, and slaked lime (more than or equal to 35 m) with high specific surface area is used by controlling the temperature, the water content and the like in the flue gas of the deacidification chamber2The acid removal is carried out according to the proportion of the calcium hydroxide, so that the acid removal efficiency of the slaked lime can reach more than 85 percent.
(3) According to the invention, through two times of slaked lime deacidification, the generation of high-salt wastewater can be greatly reduced, and even under the condition of lower content of acid gas, no high-salt wastewater is generated; meanwhile, the disposal mode of back-spraying the high-salt wastewater to the quenching tower is combined, so that the high-salt wastewater of the incineration line can be completely recycled, the high-salt wastewater is not required to be treated by using multi-effect evaporation equipment, the investment cost of the multi-effect evaporation equipment is saved, and the comprehensive operation cost is also reduced.
The present invention has been illustrated by the above embodiments, but it should be understood that the above embodiments are for illustrative and descriptive purposes only and are not intended to limit the invention to the scope of the described embodiments. Furthermore, it will be understood by those skilled in the art that the present invention is not limited to the embodiments described above, and that many variations and modifications may be made in accordance with the teachings of the present invention, which variations and modifications are within the scope of the present invention as claimed. The scope of the invention is defined by the appended claims and equivalents thereof.
Claims (7)
1. A method for purifying flue gas in a hazardous waste incineration process is characterized by comprising the following steps: conveying the flue gas at the outlet of the secondary combustion chamber to a waste heat boiler, carrying out denitration in the boiler by adopting SNCR, conveying the flue gas treated by the waste heat boiler to a deacidification chamber for deacidification, conveying the flue gas after deacidification to a quench tower for quenching, then deacidifying the flue gas after quenching again and spraying active carbon, treating the flue gas by a bag-type dust remover, a pre-cooling tower and a deacidification tower in sequence, and finally discharging the treated flue gas through a chimney.
2. The method for purifying the flue gas generated in the hazardous waste incineration process according to claim 1, wherein the temperature of the flue gas at the flue gas outlet of the waste heat boiler is set to be 500-550 ℃.
3. The method for purifying flue gas generated in the incineration process of hazardous waste according to claim 1, wherein flue gas output by the waste heat boiler is deacidified by a deacidification chamber, wherein the temperature and the humidity of the flue gas in the deacidification chamber are controlled by spraying industrial water, steam and partial high-salt wastewater into the deacidification chamber, the temperature is controlled to be 460-550 ℃, and the water content in the flue gas is controlled to be greater than or equal to 5 wt.%.
4. The method for purifying flue gas generated in hazardous waste incineration of claim 1, wherein flue gas output by the waste heat boiler is deacidified by a deacidification chamber, wherein the deacidification agent comprises slaked lime, and the specific surface area of the slaked lime is greater than or equal to 35m2/g。
5. The method for purifying flue gas in the incineration process of hazardous waste according to claim 1, wherein when the quenching tower is quenched, the quenching medium is sprayed back by high-salt wastewater.
6. The method for purifying flue gas generated in the incineration of hazardous waste of claim 1, wherein the deacidification tower is only used in an emergency condition, wherein the emergency condition is a condition when the pollutant elements of the treated hazardous waste material exceed a set threshold value.
7. The method for purifying flue gas generated in the incineration of hazardous waste according to claim 1, wherein the quenched flue gas is deacidified again, and the deacidification agent comprises slaked lime.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202011398850.3A CN112755744A (en) | 2020-12-01 | 2020-12-01 | Flue gas purification method in hazardous waste incineration process |
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| CN202011398850.3A CN112755744A (en) | 2020-12-01 | 2020-12-01 | Flue gas purification method in hazardous waste incineration process |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114177760A (en) * | 2022-02-16 | 2022-03-15 | 浙江百能科技有限公司 | System and method for oxidizing active oxygen in hazardous waste incineration flue gas and integrally discharging hazardous waste incineration flue gas in ultralow emission mode |
| CN114177761A (en) * | 2022-02-16 | 2022-03-15 | 浙江百能科技有限公司 | Ultralow emission system and method for hazardous waste incineration flue gas pollutants |
| CN115353167A (en) * | 2022-08-23 | 2022-11-18 | 成都环服科技有限责任公司 | Evaporation device, system and method for deacidification of high-salinity wastewater by hazardous waste incineration wet method |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107401748A (en) * | 2017-09-11 | 2017-11-28 | 冯承湖 | A kind of second-time burning of dangerous waste burning process and depickling denitration integrated device |
| CN111006221A (en) * | 2019-12-02 | 2020-04-14 | 中节能清洁技术发展有限公司 | System and method for hazardous waste incineration |
-
2020
- 2020-12-01 CN CN202011398850.3A patent/CN112755744A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107401748A (en) * | 2017-09-11 | 2017-11-28 | 冯承湖 | A kind of second-time burning of dangerous waste burning process and depickling denitration integrated device |
| CN111006221A (en) * | 2019-12-02 | 2020-04-14 | 中节能清洁技术发展有限公司 | System and method for hazardous waste incineration |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114177760A (en) * | 2022-02-16 | 2022-03-15 | 浙江百能科技有限公司 | System and method for oxidizing active oxygen in hazardous waste incineration flue gas and integrally discharging hazardous waste incineration flue gas in ultralow emission mode |
| CN114177761A (en) * | 2022-02-16 | 2022-03-15 | 浙江百能科技有限公司 | Ultralow emission system and method for hazardous waste incineration flue gas pollutants |
| CN115353167A (en) * | 2022-08-23 | 2022-11-18 | 成都环服科技有限责任公司 | Evaporation device, system and method for deacidification of high-salinity wastewater by hazardous waste incineration wet method |
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Application publication date: 20210507 |