CN109520320B - Annealing line exhaust treatment system - Google Patents
Annealing line exhaust treatment system Download PDFInfo
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- CN109520320B CN109520320B CN201910034278.3A CN201910034278A CN109520320B CN 109520320 B CN109520320 B CN 109520320B CN 201910034278 A CN201910034278 A CN 201910034278A CN 109520320 B CN109520320 B CN 109520320B
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- Prior art keywords
- pipeline
- waste gas
- air
- treatment
- exhaust
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F27—FURNACES; KILNS; OVENS; RETORTS
- F27D—DETAILS OR ACCESSORIES OF FURNACES, KILNS, OVENS, OR RETORTS, IN SO FAR AS THEY ARE OF KINDS OCCURRING IN MORE THAN ONE KIND OF FURNACE
- F27D17/00—Arrangements for using waste heat; Arrangements for using, or disposing of, waste gases
- F27D17/004—Systems for reclaiming waste heat
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/34—Chemical or biological purification of waste gases
- B01D53/74—General processes for purification of waste gases; Apparatus or devices specially adapted therefor
- B01D53/86—Catalytic processes
- B01D53/8621—Removing nitrogen compounds
- B01D53/8625—Nitrogen oxides
- B01D53/8631—Processes characterised by a specific device
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/34—Chemical or biological purification of waste gases
- B01D53/74—General processes for purification of waste gases; Apparatus or devices specially adapted therefor
- B01D53/86—Catalytic processes
- B01D53/90—Injecting reactants
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F27—FURNACES; KILNS; OVENS; RETORTS
- F27D—DETAILS OR ACCESSORIES OF FURNACES, KILNS, OVENS, OR RETORTS, IN SO FAR AS THEY ARE OF KINDS OCCURRING IN MORE THAN ONE KIND OF FURNACE
- F27D17/00—Arrangements for using waste heat; Arrangements for using, or disposing of, waste gases
- F27D17/004—Systems for reclaiming waste heat
- F27D2017/005—Systems for reclaiming waste heat including pyrolising the waste gases
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- 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
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P10/00—Technologies related to metal processing
- Y02P10/25—Process efficiency
Abstract
The invention provides an annealing line waste gas treatment system, which comprises an air draft mechanism, an air return mechanism, a heat exchanger, an SCR waste gas treatment section and an exhaust section, wherein the air draft mechanism is arranged on the air draft mechanism; one end of the SCR waste gas treatment section is connected with the air draft mechanism, the other end of the SCR waste gas treatment section is connected with the air return mechanism, and the heat exchanger is connected between the air return mechanism and the exhaust section. The annealing line waste gas treatment system can recycle heat for reuse, effectively save energy and achieve the effects of energy conservation and emission reduction.
Description
Technical Field
The invention relates to the technical field of steel strip production equipment, in particular to an annealing line waste gas treatment system.
Background
The annealing line waste gas treatment system achieves the purposes of protecting the environment and purifying the air by recovering or removing and reducing harmful components in the discharged tail gas by applying different process technologies.
However, the existing annealing line waste gas treatment system directly discharges waste gas when treating waste gas, thereby causing large heat loss of waste gas, failing to well utilize the waste heat of the waste gas, and insufficient combustion of the waste gas; in addition, the waste gas needs to be additionally heated by external energy, so that the waste gas is more fully combusted, and the energy consumption is high.
Disclosure of Invention
The annealing line waste gas treatment system provided by the invention can recycle the waste heat of the waste gas and achieve the effects of energy conservation and emission reduction.
The technical scheme adopted by the invention is as follows: an annealing line exhaust treatment system, comprising: the device comprises an air draft mechanism, an air return mechanism, a heat exchanger, an SCR waste gas treatment section and an exhaust section; one end of the SCR waste gas treatment section is connected with the air draft mechanism, the other end of the SCR waste gas treatment section is connected with the air return mechanism, and the heat exchanger is connected between the air return mechanism and the exhaust section.
Further, the air draft mechanism comprises a main fan, a water-vapor separator and an exhaust pipeline; the water-vapor separator is connected between the main fan and the waste gas pipeline, and the waste gas pipeline is connected with the SCR waste gas treatment section.
Further, the SCR exhaust treatment section comprises a first treatment pipeline, a second treatment pipeline and a third treatment pipeline; the first treatment pipeline is connected with the waste gas pipeline, the second treatment pipeline is connected between the first treatment pipeline and the third treatment pipeline, and the third treatment pipeline is connected with the air return mechanism.
Furthermore, the air return mechanism comprises a motor, a coupler, a cooler, a heat return fan, an air inlet pipeline and an air outlet pipeline; one end of the coupler is connected with the motor, the other end of the coupler is connected with the cooler, the other end of the cooler is connected with the heat recovery fan, and the heat recovery fan is connected with the air outlet pipeline and the air inlet pipeline.
Furthermore, the outlet section of the third processing pipeline is provided with an air inlet and an air outlet, the other end of the air inlet pipeline is connected with the air inlet, and the other end of the air outlet pipeline is connected with the air outlet.
Further, the heat exchanger is connected to the air outlet.
Further, the exhaust section comprises an exhaust duct, and a stack; one end of the exhaust pipeline is connected with the heat exchanger, and the other end of the exhaust pipeline is connected with the chimney.
Compared with the prior art, the annealing line waste gas treatment system is provided with the air return mechanism, waste gas passing through the SCR waste gas treatment section is extracted by the air return mechanism and then is subjected to a second heating reaction, in the process, the heat of the waste gas is utilized to heat the absorbed waste gas, so that the waste gas is combusted more fully, the heat is recovered for reutilization, and the whole annealing line waste gas treatment system is more stable; and extra energy is not needed to heat the waste gas, so that the energy is effectively saved, and the effects of energy conservation and emission reduction are achieved.
Drawings
The accompanying drawings, which are included to provide a further understanding 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 invention without limiting the invention. In the drawings, there is shown in the drawings,
FIG. 1: a schematic of an abatement line exhaust treatment system of the present invention;
FIG. 2: another schematic of the abatement line exhaust treatment system of the present invention.
Detailed Description
The following detailed description of embodiments of the invention refers to the accompanying drawings. It should be understood that the detailed description and specific examples, while indicating the present invention, are given by way of illustration and explanation only, not limitation.
As shown in fig. 1 and 2, the annealing line waste gas treatment system of the invention comprises an air draft mechanism, an air return mechanism, a heat exchanger 1, an SCR waste gas treatment section, and an exhaust section; wherein, the exhaust mechanism is connected to the one end of SCR exhaust-gas treatment section, and return air mechanism is connected to the other end, and heat exchanger 1 is connected between return air mechanism and exhaust section. Firstly, the exhaust gas of the annealing line extracted by the air draft mechanism is conveyed to the SCR exhaust gas treatment section for primary reaction, then conveyed to the air return mechanism for secondary reaction, conveyed to the heat exchanger 1, and finally discharged from the exhaust section.
Specifically, the air draft mechanism comprises a main fan 2, a water-vapor separator 3 and a waste gas pipeline 4; the water-steam separator 3 is connected between the main fan 2 and the waste gas pipeline 4, and the waste gas pipeline 4 is connected with the SCR waste gas treatment section. The waste gas of the annealing line is extracted by a main fan 2, firstly the water vapor in the waste gas is removed by a water vapor separator 3, then the waste gas enters a waste gas pipeline 4, and the waste gas is conveyed to an SCR waste gas treatment section from the waste gas pipeline 4 for primary reaction.
The SCR exhaust gas treatment section comprises a first treatment pipeline 5, a second treatment pipeline 6 and a third treatment pipeline 7; wherein, first treatment pipeline 5 is connected with exhaust duct 4, and second treatment pipeline 6 is connected between first treatment pipeline 5 and third treatment pipeline 7, and third treatment pipeline 7 is connected with return air mechanism. And the waste gas is conveyed to the air return mechanism after primary reaction in the first treatment pipeline 5 to the third treatment pipeline 7 for secondary reaction.
The air return mechanism comprises a motor 8, a coupler 9, a cooler 10, a regenerative fan 11, an air inlet pipeline 12 and an air outlet pipeline 13; wherein, the one end and the motor 8 of shaft coupling 9 are connected, and the other end is connected with cooler 10, and the bearing cooling in for shaft coupling 9 through cooler 10 avoids the bearing to work for a long time the back high temperature and burns out, improves life. The other end of the cooler 10 is connected with a regenerative fan 11, and the regenerative fan 11 is respectively connected with an air outlet pipeline 13 and an air inlet pipeline 12 through hoses. Further, the outlet section of the third processing pipeline 7 is provided with an air inlet 70 and an air outlet 71, the other end of the air inlet pipeline 12 is connected to the air inlet 70, and the other end of the air outlet pipeline 13 is connected to the air outlet 71.
Through the arrangement of the air return mechanism, waste gas passing through the SCR waste gas treatment section is extracted by the motor 8, enters the air inlet pipeline 12 and is then output from the air outlet pipeline 13, in the process, the heat of the waste gas is utilized to heat the sucked waste gas, so that the waste gas is combusted more fully, the heat is recovered for reuse, and the whole annealing line waste gas treatment system is more stable; and extra energy is not needed to heat the waste gas, so that the energy is effectively saved, and the effects of energy conservation and emission reduction are achieved.
The heat exchanger 1 is connected with the air outlet 71, the gas from the air outlet 71 is conveyed to the heat exchanger 1, the gas is changed from hot to cold, and the waste heat of the gas is extracted to be heated by an annealing line waste gas treatment system, so that the new waste gas is more fully combusted; the gas passing through the heat exchanger 1 is conveyed to an exhaust section for discharge.
The exhaust section includes an exhaust duct 14, and a stack 15; wherein, one end of the exhaust pipeline 14 is connected with the heat exchanger 1, and the other end is connected with the chimney 15; the gas cooled by the heat exchanger 1 is sent to an exhaust duct 14, and then sent to a chimney 15 to be discharged to the outside.
In conclusion, the annealing line waste gas treatment system is provided with the air return mechanism, waste gas passing through the SCR waste gas treatment section is extracted by the motor 8, enters the air inlet pipeline 12 and is then output from the air outlet pipeline 13, in the process, the heat of the waste gas is utilized to heat the sucked waste gas, so that the waste gas is combusted more fully, the heat is recovered for reutilization, and the whole annealing line waste gas treatment system is more stable; and extra energy is not needed to heat the waste gas, so that the energy is effectively saved, and the effects of energy conservation and emission reduction are achieved.
Any combination of the various embodiments of the present invention should be considered as disclosed in the present invention, unless the inventive concept is contrary to the present invention; within the scope of the technical idea of the invention, any combination of various simple modifications and different embodiments of the technical solution without departing from the inventive idea of the present invention shall fall within the protection scope of the present invention.
Claims (4)
1. An annealing line exhaust treatment system, comprising: the device comprises an air draft mechanism, an air return mechanism, a heat exchanger (1), an SCR waste gas treatment section and an exhaust section; one end of the SCR waste gas treatment section is connected with the air draft mechanism, the other end of the SCR waste gas treatment section is connected with the air return mechanism, and the heat exchanger (1) is connected between the air return mechanism and the exhaust section;
the air draft mechanism comprises a main fan (2), a water-vapor separator (3) and a waste gas pipeline (4); the water-steam separator (3) is connected between the main fan (2) and the waste gas pipeline (4), and the waste gas pipeline (4) is connected with the SCR waste gas treatment section;
the SCR exhaust gas treatment section comprises a first treatment pipeline (5), a second treatment pipeline (6) and a third treatment pipeline (7); the first treatment pipeline (5) is connected with the waste gas pipeline (4), the second treatment pipeline (6) is connected between the first treatment pipeline (5) and the third treatment pipeline (7), and an outlet section of the third treatment pipeline (7) is provided with an air inlet (70) and an air outlet (71);
the air return mechanism comprises a motor (8), a coupler (9), a cooler (10), a regenerative fan (11), an air inlet pipeline (12) and an air outlet pipeline (13); the one end of shaft coupling (9) with motor (8) are connected, the other end with cooler (10) are connected, the other end of cooler (10) with backheat fan (11) are connected, backheat fan (11) with go out tuber pipe way (13) and intake stack (12) are connected, the other end of intake stack (12) connect in air intake (70), the other end of going out tuber pipe way (13) connect in air outlet (71), heat exchanger (1) install in air outlet (71).
2. The abatement line exhaust treatment system of claim 1, wherein: the outlet section of the third processing pipeline (7) is provided with an air inlet (70) and an air outlet (71), the other end of the air inlet pipeline (12) is connected with the air inlet (70), and the other end of the air outlet pipeline (13) is connected with the air outlet (71).
3. The abatement line exhaust treatment system of claim 2, wherein: the heat exchanger (1) is connected to the air outlet (71).
4. The abatement line exhaust treatment system of claim 1, wherein: the exhaust section comprises an exhaust duct (14), and a stack (15); one end of the exhaust pipeline (14) is connected with the heat exchanger (1), and the other end of the exhaust pipeline is connected with the chimney (15).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910034278.3A CN109520320B (en) | 2019-01-15 | 2019-01-15 | Annealing line exhaust treatment system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910034278.3A CN109520320B (en) | 2019-01-15 | 2019-01-15 | Annealing line exhaust treatment system |
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| Publication Number | Publication Date |
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| CN109520320A CN109520320A (en) | 2019-03-26 |
| CN109520320B true CN109520320B (en) | 2021-06-01 |
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| CN201910034278.3A Active CN109520320B (en) | 2019-01-15 | 2019-01-15 | Annealing line exhaust treatment system |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN110433621B (en) * | 2019-07-24 | 2021-07-30 | 湘潭大学 | Method and device for reduction denitration of kiln flue gas carbon |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103611417A (en) * | 2013-11-08 | 2014-03-05 | 江苏中金环保科技有限公司 | Wet-process denitration method for coke oven waste gas |
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Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103611417A (en) * | 2013-11-08 | 2014-03-05 | 江苏中金环保科技有限公司 | Wet-process denitration method for coke oven waste gas |
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| CN109520320A (en) | 2019-03-26 |
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