CN111256483A - Denitration equipment for aluminum melting furnace - Google Patents
Denitration equipment for aluminum melting furnace Download PDFInfo
- Publication number
- CN111256483A CN111256483A CN201911384986.6A CN201911384986A CN111256483A CN 111256483 A CN111256483 A CN 111256483A CN 201911384986 A CN201911384986 A CN 201911384986A CN 111256483 A CN111256483 A CN 111256483A
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- China
- Prior art keywords
- steam generator
- ammonia water
- melting furnace
- aluminum melting
- steam
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- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 title claims abstract description 20
- 229910052782 aluminium Inorganic materials 0.000 title claims abstract description 20
- 230000008018 melting Effects 0.000 title claims abstract description 20
- 238000002844 melting Methods 0.000 title claims abstract description 20
- VHUUQVKOLVNVRT-UHFFFAOYSA-N Ammonium hydroxide Chemical compound [NH4+].[OH-] VHUUQVKOLVNVRT-UHFFFAOYSA-N 0.000 claims abstract description 48
- 235000011114 ammonium hydroxide Nutrition 0.000 claims abstract description 48
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 24
- 239000007921 spray Substances 0.000 claims abstract description 12
- 238000001914 filtration Methods 0.000 claims abstract description 11
- 238000000034 method Methods 0.000 claims abstract description 6
- 238000004140 cleaning Methods 0.000 claims abstract description 4
- 239000007788 liquid Substances 0.000 claims description 10
- 238000010438 heat treatment Methods 0.000 claims description 9
- 238000010793 Steam injection (oil industry) Methods 0.000 claims description 3
- 238000005086 pumping Methods 0.000 claims description 3
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 abstract description 2
- 239000003546 flue gas Substances 0.000 abstract description 2
- 239000006227 byproduct Substances 0.000 abstract 1
- MWUXSHHQAYIFBG-UHFFFAOYSA-N nitrogen oxide Inorganic materials O=[N] MWUXSHHQAYIFBG-UHFFFAOYSA-N 0.000 description 18
- QGZKDVFQNNGYKY-UHFFFAOYSA-N ammonia Natural products N QGZKDVFQNNGYKY-UHFFFAOYSA-N 0.000 description 11
- 239000000779 smoke Substances 0.000 description 9
- 239000007789 gas Substances 0.000 description 6
- 238000006243 chemical reaction Methods 0.000 description 5
- RAHZWNYVWXNFOC-UHFFFAOYSA-N Sulphur dioxide Chemical compound O=S=O RAHZWNYVWXNFOC-UHFFFAOYSA-N 0.000 description 4
- 239000000428 dust Substances 0.000 description 4
- 230000000694 effects Effects 0.000 description 3
- 229910021529 ammonia Inorganic materials 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000001704 evaporation Methods 0.000 description 2
- 230000008020 evaporation Effects 0.000 description 2
- 239000010963 304 stainless steel Substances 0.000 description 1
- 229910000589 SAE 304 stainless steel Inorganic materials 0.000 description 1
- 238000009835 boiling Methods 0.000 description 1
- 239000003638 chemical reducing agent Substances 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 238000005485 electric heating Methods 0.000 description 1
- 239000003344 environmental pollutant Substances 0.000 description 1
- 230000007794 irritation Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000003020 moisturizing effect Effects 0.000 description 1
- 231100000719 pollutant Toxicity 0.000 description 1
- 238000006722 reduction reaction Methods 0.000 description 1
- 229910001220 stainless steel Inorganic materials 0.000 description 1
- 239000010935 stainless steel Substances 0.000 description 1
Images
Classifications
-
- 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
-
- 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
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/34—Chemical or biological purification of waste gases
- B01D53/74—General processes for purification of waste gases; Apparatus or devices specially adapted therefor
- B01D53/76—Gas phase processes, e.g. by using aerosols
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2251/00—Reactants
- B01D2251/20—Reductants
- B01D2251/206—Ammonium compounds
- B01D2251/2062—Ammonia
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2258/00—Sources of waste gases
- B01D2258/02—Other waste gases
- B01D2258/0283—Flue gases
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P10/00—Technologies related to metal processing
- Y02P10/25—Process efficiency
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Environmental & Geological Engineering (AREA)
- Analytical Chemistry (AREA)
- Health & Medical Sciences (AREA)
- Biomedical Technology (AREA)
- General Chemical & Material Sciences (AREA)
- Oil, Petroleum & Natural Gas (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Dispersion Chemistry (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Waste-Gas Treatment And Other Accessory Devices For Furnaces (AREA)
- Heat Treatment Of Water, Waste Water Or Sewage (AREA)
- Treating Waste Gases (AREA)
Abstract
The invention discloses denitration equipment for an aluminum melting furnace, which comprises a first collecting and processing device, a second collecting and processing device and a spray tower filtering device, wherein the first collecting and processing device is connected with the first collecting and processing device; the method is characterized in that: the ammonia water storage tank, the centrifugal pump and the steam generator are also included; the ammonia water storage tank is arranged below the second collection and treatment device; the centrifugal pump is positioned on one side of the ammonia water storage tank and pumps the ammonia water in the ammonia water storage tank into the steam generator; the steam generator is installed at the top of the second collection processing device; a steam outlet pipe of a steam valve of the steam generator is communicated with a pipeline air outlet of the second collecting and processing device; and a pipeline cleaning pipe of the steam generator extends into the circulating water tank on one side of the spray tower filtering device. The flue gas treated by the method has no by-product, no secondary pollution is caused, the structure is simple, the removal efficiency is high, and the purpose of reducing the emission is achieved by controlling from the emission source.
Description
Technical Field
The invention relates to denitration equipment, in particular to denitration equipment of an aluminum melting furnace.
Background
Nitrogen oxides are one of the three major atmospheric pollutants generally recognized (i.e., smoke, sulfur dioxide, nitrogen oxides) and are of high concern because they are too harmful, if not too harmful, than sulfur dioxide. The gas discharged by the aluminum melting furnace contains nitrogen oxides which have certain influence on the environment.
Disclosure of Invention
The invention aims to solve the problems in the prior art and provides denitration equipment for an aluminum melting furnace.
The technical scheme of the invention is as follows: a denitration device of an aluminum melting furnace comprises a first collection treatment device, a second collection treatment device and a spray tower filtering device; the method is characterized in that: the ammonia water storage tank, the centrifugal pump and the steam generator are also included; the ammonia water storage tank is arranged below the second collection and treatment device; the centrifugal pump is positioned on one side of the ammonia water storage tank and pumps the ammonia water in the ammonia water storage tank into the steam generator; the steam generator is installed at the top of the second collection processing device; a steam outlet pipe of a steam valve of the steam generator is communicated with a pipeline air outlet of the second collecting and processing device; and a pipeline cleaning pipe of the steam generator extends into the circulating water tank on one side of the spray tower filtering device.
Preferably, the top of the pipeline air outlet is provided with a steam injection interface which is connected with the steam outlet pipe of the steam valve.
Preferably, the water inlet end of the centrifugal pump is connected with the ammonia water storage tank; the water outlet end of the centrifugal pump is connected with the liquid inlet end of the steam generator through an ammonia water feeding pipe.
Preferably, the steam generator comprises a machine body, rollers arranged at the bottom of the machine body, a boiler liner arranged in the machine body, a heating system for heating the boiler liner, a water pump motor for pumping liquid out of the boiler liner, and a control system for controlling the whole machine body to operate.
Preferably, a safety valve is arranged at the liquid outlet end of the steam generator.
Preferably, the heating system is located above the water pump motor.
Preferably, the control system is located at an upper portion of the body.
Preferably, one side of the control system is provided with a pressure controller.
Preferably, the first collection processing device is connected with the air inlet of the second collection processing device through a negative pressure pipeline of a fan; and the air outlet of the second collecting and processing device is connected with an air inlet pipeline of the spray tower filtering device.
The invention collects all the smoke of the aluminum melting furnace through the first collecting device and the second collecting device, and mixes the ammonia water evaporation gas with the concentration of 10% with the smoke of the smoke exhaust through the smoke at the air outlet of the dust collector pipeline of the dust removing device, and then the chemical reaction is carried out, so as to achieve the effect of reducing the concentration of nitrogen oxide.
Drawings
FIG. 1 is a schematic structural diagram of the present invention
FIG. 2 is an enlarged view of part A of FIG. 1
FIG. 3 is an enlarged view of the portion B in FIG. 1
FIG. 4 is an internal view of the steam generator according to the present invention
FIG. 5 is another perspective internal view of the steam generator of the present invention
FIG. 6 is a schematic diagram of denitration according to the present invention
FIG. 7 is a reaction scheme of the present invention
Detailed Description
In order to make the technical means, technical features, objects and technical effects of the present invention easily understandable, the present invention is further described below with reference to the specific drawings.
As shown in fig. 1 to 6, a denitration apparatus for an aluminum melting furnace according to the present invention includes a first collection processing device 100, a second collection processing device 200, and a spray tower filtering device 300. The first collection processing device 100 is connected with an air inlet of the second collection processing device 200 through a fan negative pressure pipeline; and the air outlet of the second collection and treatment device 200 is connected with the air inlet pipeline of the spray tower filtering device 300.
The present invention further includes an ammonia water storage tank 400, a centrifugal pump 500, and a steam generator 600; the ammonia water storage tank 400 is arranged below the second collection and treatment device 200; the centrifugal pump 500 is located at one side of the ammonia water storage tank 400, and pumps the ammonia water in the ammonia water storage tank 400 into the steam generator.
The ammonia water with the concentration of 10% is adopted in the invention, and as the ammonia water liquid has strong corrosivity and irritation, the device for containing the ammonia water selects the 304 stainless steel ammonia water storage tank 400, the ammonia water with the concentration of 10% is measured and poured into the ammonia water storage tank 400 (or a storage tank capable of displaying the volume amount is selected), a valve at the bottom of the storage tank is opened, the ammonia water with the concentration of 10% flows to the vertical multistage centrifugal pump 500 through a feeding pipe, the ammonia water with the concentration of 10% is lifted by the lifting action of the centrifugal pump 400, the ammonia water with the concentration of 10% is directly lifted into the steam generator 600 at the top of the second collection and treatment device 200, and the total height of the second collection and treatment device 200 is about 17.
The steam step is as follows: 10% aqueous ammonia is through aqueous ammonia bin 400's lower extreme, promote with the centrifugal pump, beat the aqueous ammonia 17 meters high platform, the aqueous ammonia gets into the steam generator water inlet, reentrant steam generator water tank, beat the boiler inner bag by steam generator water pump motor again, this valve is the check valve, only can advance, can not go out, measure water level by the fluviograph again, whether control needs the moisturizing, the water of boiler inner bag is through heating system, reach the boiling temperature of evaporimeter, begin to produce steam, gas rises gradually and separates with the water, reach the steam generator gas outlet.
The steam generator 600 is installed at the top of the second collection processing device 200; a steam valve steam outlet pipe 601 of the steam generator 600 is communicated with a steam injection interface of the pipeline air outlet 207 of the second collection processing device 200; the pipe cleaning pipe 602 of the steam generator 600 extends into the circulating water tank 301 on one side of the spray tower filtering device 300.
The water inlet end of the centrifugal pump 500 in this embodiment is connected to the ammonia water storage tank 400; the water outlet end of the centrifugal pump 500 is connected to the liquid inlet end of the steam generator 600 through an ammonia water feeding pipe 501.
Referring to fig. 4 and 5, the steam generator 600 of the present invention includes a body 603, rollers 604 disposed at the bottom of the body 603, a boiler liner 605 disposed in the body 603, a heating system 606 for heating the boiler liner 605, a water pump motor 607 for pumping the liquid out of the boiler liner 605, and a control system 608 for controlling the operation of the whole body, and a safety valve 609 is disposed at a liquid outlet end of the steam generator.
The steam generator adopted in the invention is an electric heating type; the centrifugal pump 500 is started to lift the 10% ammonia water to the 17 th platform, and then the ammonia water is transmitted to the inner container of the steam generator 600 through the one-way valve for the water pump motor, and the inner container and related accessories (pipelines and valves) are made of 316L stainless steel due to the corrosiveness of the ammonia water.
The aqueous ammonia addition of 10% concentration can be known through control box panel water level lamp, treat that the water yield fills up the inner bag after, open steam generator 600's power, heat the 10% concentration aqueous ammonia through the hydrologic cycle and heat up, treat that steam generator manometer pressure reaches 0.4Mpa, when steam temperature reaches 230 degrees centigrade, begin to produce aqueous ammonia steam, give vent to anger pipeline exhaust steam through steam, steam directly flows to the second and collects in the processing apparatus 200 air outlet pipeline.
Referring to fig. 6-7, the NOx removal process of the present invention is a chemical reduction method, wherein ammonia is used to heat to 230 degrees celsius to form ammonia vapor, and NOx is reduced to N2, as follows:
the main reaction is as follows:
4NO+4NH3+O2→4N2+6H2O
6NO+4NH3→5N2+6H2O
6NO2+8NH3→7NO2+12H2O
2NO2+4NH3+O2→3N2+6H2O
and (3) discharging the steam to the air outlet of the second collection and treatment device 200 through a steam pipe to spray, so that the evaporated gas of the ammonia water with the concentration of 10% and the flue gas are subjected to chemical reaction, and the concentration of the nitrogen oxides is reduced.
The invention collects all the smoke of the aluminum melting furnace through the first collecting device and the second collecting device, and mixes the ammonia water evaporation gas with the concentration of 10% with the smoke of the smoke exhaust through the smoke at the air outlet of the dust collector pipeline of the dust removing device, and then the chemical reaction is carried out, so as to achieve the effect of reducing the concentration of nitrogen oxide.
In summary, the embodiments of the present invention are merely exemplary and should not be construed as limiting the scope of the invention. All equivalent changes and modifications made according to the content of the claims of the present invention should fall within the technical scope of the present invention.
Claims (10)
1. The denitration equipment of the aluminum melting furnace comprises a first collection treatment device, a second collection treatment device and a spray tower filtering device; the method is characterized in that: the ammonia water storage tank, the centrifugal pump and the steam generator are also included; the ammonia water storage tank is arranged below the second collection and treatment device; the centrifugal pump is positioned on one side of the ammonia water storage tank and pumps the ammonia water in the ammonia water storage tank into the steam generator; the steam generator is installed at the top of the second collection processing device; a steam outlet pipe of a steam valve of the steam generator is communicated with a pipeline air outlet of the second collecting and processing device; and a pipeline cleaning pipe of the steam generator extends into the circulating water tank on one side of the spray tower filtering device.
2. The aluminum melting furnace denitration apparatus according to claim 1, characterized in that: and the top of the pipeline air outlet is provided with a steam injection interface which is connected with the steam outlet pipe of the steam valve.
3. The aluminum melting furnace denitration apparatus according to claim 1, characterized in that: the water inlet end of the centrifugal pump is connected with the ammonia water storage tank;
4. the aluminum melting furnace denitration apparatus according to claim 1 or 3, characterized in that: the water outlet end of the centrifugal pump is connected with the liquid inlet end of the steam generator through an ammonia water feeding pipe.
5. The aluminum melting furnace denitration apparatus according to claim 1, characterized in that: the steam generator comprises a machine body, rollers arranged at the bottom of the machine body, a boiler liner arranged in the machine body, a heating system for heating the boiler liner, a water pump motor for pumping liquid out of the boiler liner, and a control system for controlling the whole machine body to operate.
6. The aluminum melting furnace denitration apparatus according to claim 5, characterized in that: and a safety valve is arranged at the liquid outlet end of the steam generator.
7. The aluminum melting furnace denitration apparatus according to claim 5, characterized in that: the heating system is positioned above the water pump motor.
8. The aluminum melting furnace denitration apparatus according to claim 5, characterized in that: the control system is positioned at the upper part of the machine body.
9. The aluminum melting furnace denitration apparatus according to claim 5, characterized in that: and one side of the control system is provided with a pressure controller.
10. The aluminum melting furnace denitration apparatus according to claim 1, characterized in that: the first collection processing device is connected with an air inlet of the second collection processing device through a fan negative pressure pipeline; and the air outlet of the second collecting and processing device is connected with an air inlet pipeline of the spray tower filtering device.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911384986.6A CN111256483A (en) | 2019-12-28 | 2019-12-28 | Denitration equipment for aluminum melting furnace |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911384986.6A CN111256483A (en) | 2019-12-28 | 2019-12-28 | Denitration equipment for aluminum melting furnace |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN111256483A true CN111256483A (en) | 2020-06-09 |
Family
ID=70946759
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201911384986.6A Pending CN111256483A (en) | 2019-12-28 | 2019-12-28 | Denitration equipment for aluminum melting furnace |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN111256483A (en) |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0419918A2 (en) * | 1989-09-23 | 1991-04-03 | Bayer Ag | Substituted 1,3,4-oxa(thia)-diazolinones, process for their preparation and their use in controlling endoparasites |
| CN1132107A (en) * | 1994-11-04 | 1996-10-02 | 巴布考克及威尔考克斯公司 | Ammonia reagent application for NOx, SOx and particulate emission control |
| CA2249408A1 (en) * | 1996-03-22 | 1997-09-25 | The Procter & Gamble Company | Delivery system having release barrier loaded zeolite |
| CN106277145A (en) * | 2016-08-30 | 2017-01-04 | 宁波中金石化有限公司 | The apparatus and method that a kind of aromatic hydrocarbons cleaning produces |
| CN107469594A (en) * | 2017-08-21 | 2017-12-15 | 无锡市曜通环保机械有限公司 | A kind of coal-burning boiler for flue gas desulfurization, denitration device |
| CN208936531U (en) * | 2018-10-19 | 2019-06-04 | 浙江音诺伟森热能科技有限公司 | A kind of compact hot-water boiler |
| CN211903776U (en) * | 2019-12-28 | 2020-11-10 | 重庆新格有色金属有限公司 | Denitration equipment for aluminum melting furnace |
-
2019
- 2019-12-28 CN CN201911384986.6A patent/CN111256483A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0419918A2 (en) * | 1989-09-23 | 1991-04-03 | Bayer Ag | Substituted 1,3,4-oxa(thia)-diazolinones, process for their preparation and their use in controlling endoparasites |
| CN1132107A (en) * | 1994-11-04 | 1996-10-02 | 巴布考克及威尔考克斯公司 | Ammonia reagent application for NOx, SOx and particulate emission control |
| CA2249408A1 (en) * | 1996-03-22 | 1997-09-25 | The Procter & Gamble Company | Delivery system having release barrier loaded zeolite |
| CN106277145A (en) * | 2016-08-30 | 2017-01-04 | 宁波中金石化有限公司 | The apparatus and method that a kind of aromatic hydrocarbons cleaning produces |
| CN107469594A (en) * | 2017-08-21 | 2017-12-15 | 无锡市曜通环保机械有限公司 | A kind of coal-burning boiler for flue gas desulfurization, denitration device |
| CN208936531U (en) * | 2018-10-19 | 2019-06-04 | 浙江音诺伟森热能科技有限公司 | A kind of compact hot-water boiler |
| CN211903776U (en) * | 2019-12-28 | 2020-11-10 | 重庆新格有色金属有限公司 | Denitration equipment for aluminum melting furnace |
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