CN211988007U - Equipment for treating waste incineration flue gas - Google Patents
Equipment for treating waste incineration flue gas Download PDFInfo
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- CN211988007U CN211988007U CN201921719496.2U CN201921719496U CN211988007U CN 211988007 U CN211988007 U CN 211988007U CN 201921719496 U CN201921719496 U CN 201921719496U CN 211988007 U CN211988007 U CN 211988007U
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Abstract
The utility model provides an equipment for handling waste incineration flue gas, a serial communication port, include: is arranged on the panThe denitration device is arranged on the water cooling wall of the furnace and is used for carrying out denitration treatment on the waste incineration flue gas; a semidry deacidification device communicated with the outlet of the boiler; and H on a flue from the outlet of the boiler to the inlet of the semi-dry deacidification device2O2And (4) a spraying device. By the SNCR + H disclosed in the application2O2Spraying H on the flue at the inlet of the semi-dry reaction tower2O2Oxidizing NO into high-valence nitrogen oxide and SO under the catalytic action of transition metal oxide in fly ash2Oxidation to SO3Meanwhile, partial heavy metal can be oxidized, and most of acid gas in the flue gas is further removed. The equipment has low investment cost, convenient operation and maintenance and H2O2It is decomposed into water and oxygen at high temperature without secondary pollution.
Description
Technical Field
The utility model relates to a msw incineration flue gas handles technical field, concretely relates to equipment for handling msw incineration flue gas.
Background
Along with the continuous acceleration of the urbanization process of China, the living standard of residents is continuously improved, and the production amount of domestic garbage of China is increased year by year. The domestic garbage treatment mode in China mainly comprises three modes of incineration, biochemistry and landfill. Compared with biochemistry and landfill, incineration treatment has the characteristics of small occupied area, high treatment efficiency, thorough harmlessness, easiness in control of generated pollutants and the like, and generated heat energy can be recycled for power generation, so that the garbage recycling is realized, and the advantages are obvious. Waste incineration power generation becomes an industry in which our country policy encourages development. However, incineration of waste is also subject to a number of controversies, including disposal of the flue gases from incineration. The flue gas generated by incineration contains HCl, nitric oxide and SO2Heavy metals, particulates, dioxins and the like, and if the pollution cannot be effectively treated, the pollution is treatedSecondary pollution to the environment. The existing flue gas treatment process can basically meet the limit values of the pollution control standard for domestic waste incineration (GB18485-2014) and the emission standard for pollutants for European Union waste incineration (DIRECTIVE-2000), but the process is difficult to realize higher emission standard along with the continuous improvement of the environmental protection requirement.
In order to improve the pollutant removal efficiency, the existing process adopts an ozone oxidation and wet method to remove NO and SO2The oxide is oxidized into high-valence nitrogen oxide and sulfur oxide, and the solubility of the nitrogen oxide and the sulfur oxide in water is improved, so that the removal efficiency is better improved. However, the process ozone generator has high investment cost and large energy consumption, and the incompletely reacted ozone enters air to cause new secondary pollution.
Therefore, there is a need to provide a new device to solve the above technical problems.
SUMMERY OF THE UTILITY MODEL
In the summary section a series of concepts in a simplified form is introduced, which will be described in further detail in the detailed description section. The inventive content does not imply any attempt to define the essential features and essential features of the claimed solution, nor is it implied to be intended to define the scope of the claimed solution.
In order to improve the pollutant removal efficiency, the existing process adopts an ozone oxidation and wet method to remove NO and SO2The oxide is oxidized into high-valence nitrogen oxide and sulfur oxide, and the solubility of the nitrogen oxide and the sulfur oxide in water is improved, so that the removal efficiency is better improved. However, the process ozone generator has high investment cost and large energy consumption, and the incompletely reacted ozone enters air to cause new secondary pollution.
In order to solve the above problem, the utility model provides an equipment for handling waste incineration flue gas, include: the denitration device is arranged on the water-cooled wall of the boiler and is used for carrying out denitration treatment on the waste incineration flue gas;
a semidry deacidification device communicated with the outlet of the boiler; and
the outlet of the boiler is arranged in the semidry deacidification deviceH on the flue of the mouth2O2And (4) a spraying device.
Further, the system also comprises a dry deacidification device which is used for further deacidifying the waste incineration flue gas introduced from the semi-dry deacidification device.
And further, the device also comprises an activated carbon injection device which is used for adsorbing and treating the waste incineration flue gas introduced from the dry deacidification device.
Further, the device also comprises a bag-type dust collector which is used for removing pollutants in the waste incineration flue gas introduced from the activated carbon injection device.
Further, the system also comprises a wet tower which is used for treating pollutants in the waste incineration flue gas introduced from the bag-type dust remover.
Further, the device also comprises a ventilation tower which is used for discharging the waste incineration flue gas treated by the wet tower.
Further, the denitration device is an SNCR denitration device.
Further, the semi-dry deacidification device is a semi-dry reaction tower.
Further, the temperature range of the denitration device for carrying out denitration treatment on the waste incineration flue gas is 850-1000 ℃.
The utility model discloses profitable effect is: by "SNCR + H2O2Spraying H on the flue at the inlet of the semi-dry reaction tower2O2Oxidizing NO into high-valence nitrogen oxide and SO under the catalytic action of transition metal oxide in fly ash2Oxidation to SO3Meanwhile, partial heavy metal can be oxidized, and most of acid gas in the flue gas is further removed. The equipment has low investment cost, convenient operation and maintenance and H2O2It is decomposed into water and oxygen at high temperature without secondary pollution.
Drawings
The following drawings of the embodiments of the present invention are provided as a part of the present invention for understanding the present invention. There are shown in the drawings, embodiments and descriptions thereof, which are used to explain the principles of the invention. In the drawings, there is shown in the drawings,
fig. 1 shows a flow chart of flue gas purification in an embodiment of the present invention;
description of reference numerals:
1. a boiler; 2. A denitration device; 3. h2O2Injection device
4. A semi-dry deacidification device; 5. A dry deacidification unit; 6. activated carbon injection device
7. A bag-type dust collector 8 and a wet tower; 9. ventilation tower
Detailed Description
In the following description, numerous specific details are set forth in order to provide a more thorough understanding of the present invention. It will be apparent, however, to one skilled in the art, that the present invention may be practiced without one or more of these specific details. In other instances, well-known features have not been described in order to avoid obscuring the present invention.
In order to thoroughly understand the present invention, a detailed description will be provided in the following description to illustrate the present invention, which is a waste incineration flue gas treatment apparatus. It is apparent that the practice of the invention is not limited to the specific details familiar to those skilled in the art of waste treatment. The preferred embodiments of the present invention are described in detail below, however, other embodiments of the present invention are possible in addition to these detailed descriptions.
It should be noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of example embodiments in accordance with the invention. As used herein, the singular is intended to include the plural unless the context clearly dictates otherwise. It will be further understood that the terms "comprises" and/or "comprising," when used in this specification, specify the presence of stated features, integers, steps, operations, elements, and/or components, but do not preclude the presence or addition of one or more other features, integers, steps, operations, elements, components, and/or groups thereof.
Exemplary embodiments according to the present invention will now be described in more detail with reference to the accompanying drawings. These exemplary embodiments may, however, be embodied in many different forms and should not be construed as limited to only the embodiments set forth herein. It is to be understood that these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the concept of these exemplary embodiments to those skilled in the art. In the drawings, the thicknesses of layers and regions are exaggerated for clarity, and the same elements are denoted by the same reference numerals, and thus the description thereof will be omitted.
In order to improve the pollutant removal efficiency, the existing process adopts an ozone oxidation and wet method to remove NO and SO2The oxide is oxidized into high-valence nitrogen oxide and sulfur oxide, and the solubility of the nitrogen oxide and the sulfur oxide in water is improved, so that the removal efficiency is better improved. However, the process ozone generator has high investment cost and large energy consumption, and the incompletely reacted ozone enters air to cause new secondary pollution.
In order to solve the problems in the prior art, the utility model provides a treatment facility for msw incineration flue gas, it mainly includes: the denitration device is arranged on the water-cooled wall of the boiler and is used for carrying out denitration treatment on the waste incineration flue gas; the deacidification device is communicated with the outlet of the boiler; h from boiler outlet to inlet flue of deacidification device2O2And (4) a spraying device.
To sum up, the utility model discloses an export the boiler and arrive set up H on the flue of half dry reaction tower entry2O2The spraying device oxidizes NO into high-valence nitrogen oxide and SO under the catalytic action of transition metal oxide in fly ash2Oxidation to SO3Meanwhile, partial heavy metal can be oxidized, and most of acid gas in the flue gas is further removed. The equipment has low investment cost, convenient operation and maintenance and H2O2It is decomposed into water and oxygen at high temperature without secondary pollution.
The following, with reference to fig. 1, makes a detailed description of the treatment device for waste incineration flue gas of the present invention. Fig. 1 is a flow chart of flue gas purification according to an embodiment of the present invention.
As shown in figure 1, the utility model discloses a treatment facility of msw incineration flue gas, include:
the denitration device 2 is arranged on the water wall of the boiler 1, and the denitration device 2 is used for carrying out denitration treatment on the waste incineration flue gas.
Further, the denitration device 2 may be an SNCR or SCR denitration device, and the denitration device 2 is an SNCR denitration device in this application as an example.
Further, the temperature range of denitration treatment of the waste incineration flue gas by the SNCR denitration device 2 is 850-1000 ℃.
Illustratively, the boiler 1 has a boiler grate (not shown) disposed therein, and the boiler grate is disposed in a boiler furnace and functions to burn garbage to generate incineration flue gas for power generation.
Illustratively, a semi-dry deacidification device 4 is also communicated with the outlet of the boiler, and the semi-dry reaction tower is used for deacidifying the waste incineration flue gas led out from the boiler.
Further, as shown in fig. 1, a flue from an outlet of the boiler 1 to an inlet of the semi-dry deacidification apparatus 4 is provided with H2O2Injection device 3, H2O2The injection device 3 injects H before the waste incineration flue gas enters the semi-dry deacidification device 42O2By means of H2O2As oxidizing agent, NO and SO2Thereby improving the desulfurization efficiency of the semi-dry deacidification device 4.
Illustratively, the semi-dry deacidification device is a semi-dry reaction tower.
Further, as shown in fig. 1, the flue gas is deacidified by a semi-dry deacidification device 4, and then enters a dry deacidification device 5, and slaked lime, dry powder and the like are sprayed into the flue by the dry deacidification device 5, so that the waste incineration flue gas is further deacidified.
Further, as shown in fig. 1, after the flue gas is further deacidified by the dry deacidification device 5, the activated carbon injection device 6 continues to inject activated carbon into the flue so as to adsorb heavy metals and dioxin pollutants in the waste incineration flue gas.
Further, as shown in fig. 1, the waste incineration flue gas is treated by an activated carbon injection device 6 and then enters a bag-type dust collector 7 for pollutant removal.
Further, the system also comprises a wet tower 8 and a ventilation tower 9, wherein a small amount of acid gas and particulate matters in the waste incineration flue gas treated by the bag-type dust remover are removed by the wet tower, and then the waste incineration flue gas is discharged by the ventilation tower 9.
Therefore, it is right to have accomplished the utility model discloses the explanation and the explanation of the treatment facility of msw incineration flue gas still can include other parts and constructions to the treatment facility of complete msw incineration flue gas, and this is not being repeated again.
In conclusion, "SNCR + H" is used2O2Spraying H on the flue at the inlet of the semi-dry reaction tower2O2Oxidizing NO into high-valence nitrogen oxide and SO under the catalytic action of transition metal oxide in fly ash2Oxidation to SO3Meanwhile, partial heavy metal can be oxidized, and most of acid gas in the flue gas is further removed. The equipment has low investment cost, convenient operation and maintenance and H2O2It is decomposed into water and oxygen at high temperature without secondary pollution. Furthermore, via H2O2After oxidation, the deacidification efficiency of the semi-dry method and the deacidification efficiency of the dry method are improved, the treatment pressure of the wet method is reduced, the amount of waste water generated by the wet method is correspondingly reduced, and the waste water treatment cost is also reduced.
The present invention has been described in terms of the above embodiments, but it is to be understood that the above embodiments are for purposes of illustration and description only and are not intended to limit the invention to 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 more modifications and variations are possible in light of the teaching of the present invention and are within the scope of the invention as claimed. The scope of the invention is defined by the appended claims and equivalents thereof.
Claims (9)
1. An apparatus for treating waste incineration flue gas, comprising:
the denitration device is arranged on the water-cooled wall of the boiler and is used for carrying out denitration treatment on the waste incineration flue gas;
a semidry deacidification device communicated with the outlet of the boiler; and H on a flue from the outlet of the boiler to the inlet of the semi-dry deacidification device2O2And (4) a spraying device.
2. The apparatus according to claim 1, further comprising a dry deacidification apparatus for further deacidifying the waste incineration flue gas introduced from the semi-dry deacidification apparatus.
3. The apparatus according to claim 2, further comprising an activated carbon injection device for adsorption treatment of the waste incineration flue gas introduced from the dry deacidification device.
4. The apparatus of claim 3, further comprising a bag-type dust collector for removing pollutants from the waste incineration flue gas introduced from the activated carbon injection device.
5. The apparatus of claim 4, further comprising a wet tower for treating contaminants in the waste incineration flue gas introduced from the bag-type dust collector.
6. The apparatus of claim 5, further comprising a ventilation tower for removing waste incineration flue gas treated by the wet tower.
7. The apparatus of claim 1, wherein the denitrification device is an SNCR denitrification device.
8. The apparatus as claimed in claim 1, wherein the semi-dry deacidification apparatus is a semi-dry reaction tower.
9. The apparatus according to any one of claims 1 to 8, wherein the temperature range of the denitration device for performing denitration treatment on the waste incineration flue gas is 850-1000 ℃.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921719496.2U CN211988007U (en) | 2019-10-14 | 2019-10-14 | Equipment for treating waste incineration flue gas |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921719496.2U CN211988007U (en) | 2019-10-14 | 2019-10-14 | Equipment for treating waste incineration flue gas |
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| Publication Number | Publication Date |
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| CN211988007U true CN211988007U (en) | 2020-11-24 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201921719496.2U Active CN211988007U (en) | 2019-10-14 | 2019-10-14 | Equipment for treating waste incineration flue gas |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113751476A (en) * | 2021-10-18 | 2021-12-07 | 北京科技大学 | Method for cooperative treatment and cyclic utilization of metallurgical solid waste and municipal waste incineration fly ash |
-
2019
- 2019-10-14 CN CN201921719496.2U patent/CN211988007U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113751476A (en) * | 2021-10-18 | 2021-12-07 | 北京科技大学 | Method for cooperative treatment and cyclic utilization of metallurgical solid waste and municipal waste incineration fly ash |
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