CN211903776U - Denitration equipment for aluminum melting furnace - Google Patents
Denitration equipment for aluminum melting furnace Download PDFInfo
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- CN211903776U CN211903776U CN201922425410.1U CN201922425410U CN211903776U CN 211903776 U CN211903776 U CN 211903776U CN 201922425410 U CN201922425410 U CN 201922425410U CN 211903776 U CN211903776 U CN 211903776U
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- steam generator
- melting furnace
- ammonia water
- steam
- aluminum melting
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Abstract
The utility model discloses an aluminum melting furnace denitration device, which comprises a first collecting and processing device, a second collecting and processing 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. Through the utility model discloses do not have the accessory substance in the flue gas of processing, can not form secondary pollution, the utility model discloses simple structure to the desorption is efficient, from the control of emission source, reaches the purpose that reduces the emission.
Description
Technical Field
The utility model relates to a denitration device especially relates to a denitration device of aluminium 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.
SUMMERY OF THE UTILITY MODEL
The utility model aims at solving the problems in the prior art and providing an aluminum melting furnace denitration device.
The technical scheme of the utility model is that: 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 utility model discloses a first collection device and second collection device will melt the whole collections of flue gas of aluminium stove to through the flue gas of dust collecting equipment dust catcher pipeline air outlet, let the aqueous ammonia evaporating gas of 10% concentration mix the back with the flue gas of discharging fume, take place the chemical reaction after, reach the effect that reduces nitrogen oxide concentration, through the utility model discloses there is not the accessory substance in the flue gas, can not form secondary pollution, this simple structure to the desorption is efficient, from emission source control, reaches the purpose that reduces the emission.
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 a schematic view of the inside of the steam generator of the present invention
FIG. 5 is another angle of the steam generator according to the present invention
FIG. 6 shows a schematic diagram of denitration according to the present invention
FIG. 7 is a reaction schematic diagram of the present invention
Detailed Description
In order to make the utility model realize that the technical means, technical characteristics, utility model purpose and technological effect are easily understood and known, combine specific figure below, further explain the utility model.
As shown in fig. 1 to 7, for the utility model discloses an aluminum melting furnace denitration device, which comprises 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 utility model also comprises 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 utility model discloses in adopt the aqueous ammonia of 10% concentration, there are strong corrosivity and irritability because of aqueous ammonia liquid, 304 stainless steel's aqueous ammonia bin 400 is selected to the utensil of splendid attire aqueous ammonia, after the aqueous ammonia measurement of 10% concentration, pour into in the aqueous ammonia bin 400 (or select the bin that can show the volumetric capacity), open the valve of bin bottom, the aqueous ammonia of 10% concentration passes through the inlet tube and flows to vertical multistage centrifugal pump 500, the aqueous ammonia of 10% concentration is through centrifugal pump 400's promotion effect, in directly promoting the aqueous ammonia of 10% concentration to the steam generator 600 at second collection processing apparatus 200 top, the second is collected processing apparatus 200 total height and is about 17 meters.
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, a roller 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 the liquid outlet end of the steam generator.
The steam generator adopted in the utility model 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 to 7, the NOx removal process in the present invention is a chemical reduction method, wherein ammonia water is used to heat up to 230 ℃, and NOx is reduced to N2 under the condition of ammonia steam formation, and the reaction is 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 utility model discloses a first collection device and second collection device will melt the whole collections of flue gas of aluminium stove to through the flue gas of dust collecting equipment dust catcher pipeline air outlet, let the aqueous ammonia evaporating gas of 10% concentration mix the back with the flue gas of discharging fume, take place the chemical reaction after, reach the effect that reduces nitrogen oxide concentration, through the utility model discloses there is not the accessory substance in the flue gas, can not form secondary pollution, the utility model discloses simple structure to the desorption is efficient, from emission source control, reaches the purpose that reduces the emission.
In summary, the preferred embodiments of the present invention are only described, and the scope of the present invention is not limited thereto. All equivalent changes and modifications made according to the content of the claims of the present invention shall 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 |
|---|---|---|---|
| CN201922425410.1U CN211903776U (en) | 2019-12-28 | 2019-12-28 | Denitration equipment for aluminum melting furnace |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922425410.1U CN211903776U (en) | 2019-12-28 | 2019-12-28 | Denitration equipment for aluminum melting furnace |
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| Publication Number | Publication Date |
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| CN211903776U true CN211903776U (en) | 2020-11-10 |
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| CN201922425410.1U Active CN211903776U (en) | 2019-12-28 | 2019-12-28 | Denitration equipment for aluminum melting furnace |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111256483A (en) * | 2019-12-28 | 2020-06-09 | 重庆新格有色金属有限公司 | Denitration equipment for aluminum melting furnace |
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2019
- 2019-12-28 CN CN201922425410.1U patent/CN211903776U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111256483A (en) * | 2019-12-28 | 2020-06-09 | 重庆新格有色金属有限公司 | Denitration equipment for aluminum melting furnace |
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