Low-temperature flue gas SCR denitration device for metallurgical industry

Abstract

The utility model relates to environmental protection technical field discloses a kind of metallurgical industry low-temperature flue gas SCR denitration device, including flue gas temperature adjusting mechanism, denitration mechanism and exhaust mechanism, flue gas temperature adjusting mechanism is located in the side of exhaust mechanism, flue gas temperature adjusting mechanism includes shell, the inner wall of shell is fixedly connected with heat exchange pipe, the upper end of shell inner wall is rotatably connected with baffle, the upper end of baffle is fixedly connected with handle, the side of shell is fixedly connected with air inlet pipe, the other side of shell is fixedly connected with air outlet pipe, the front end of shell is fixedly connected with fixed pipe, the rear end of shell is equipped with air outlet, the bottom of shell is fixedly connected with support column, the utility model passes through setting flue gas temperature adjusting mechanism, flue gas after denitration enters multiple heat exchange pipes inside shell inside air inlet pipe, both can carry out sufficient heat exchange, reduce subsequent heating component and combustion air fan's energy consumption and operating cost, further improve the overall heat utilization rate.

Description

Technical Field

[0001] This utility model relates to the field of environmental protection technology, and in particular to a low-temperature flue gas SCR denitrification device for the metallurgical industry. Background Technology

[0002] Low-temperature flue gas SCR (Selective Catalytic Reduction) denitrification devices in the metallurgical industry are technical devices that use catalysts and reducing agents (usually ammonia or urea) to selectively reduce nitrogen oxides (NOx) in flue gas under low-temperature conditions. Through the action of the catalyst, the device reduces NOx in the flue gas into harmless nitrogen and water vapor, thereby effectively reducing pollutant emissions in the exhaust gas. Low-temperature SCR devices can maintain high denitrification efficiency at relatively low flue gas temperatures (generally between 180-420℃), which can not only significantly reduce nitrogen oxide emissions and meet increasingly stringent environmental standards, but also improve the environmental efficiency and production sustainability of metallurgical enterprises. It is one of the key technologies for achieving clean production and environmental protection.

[0003] Currently, there are various types of low-temperature flue gas SCR denitrification devices for the metallurgical industry on the market. However, these devices usually require additional heating of the flue gas to a certain temperature to ensure the subsequent reaction. Especially in the case of low-temperature flue gas, the heating components may consume a lot of energy, which not only increases operating costs but may also lead to low energy efficiency. Utility Model Content

[0004] To solve the above-mentioned technical problems, this utility model provides a low-temperature flue gas SCR denitrification device for the metallurgical industry.

[0005] This utility model is achieved by the following technical solution: a low-temperature flue gas SCR denitrification device for the metallurgical industry, including a flue gas temperature regulating mechanism, a denitrification mechanism and a flue gas exhaust mechanism, wherein the flue gas temperature regulating mechanism is located on one side of the flue gas exhaust mechanism and the denitrification mechanism is located at the rear end of the flue gas temperature regulating mechanism; The flue gas temperature regulating mechanism includes a housing, a heat exchange tube fixedly connected to the inner wall of the housing, a baffle rotatably connected to the upper end of the inner wall of the housing, a handle fixedly connected to the upper end of the baffle, an air inlet pipe fixedly connected to one side of the housing, an air outlet pipe fixedly connected to the other side of the housing, a fixing pipe fixedly connected to the front end of the housing, an air outlet opened at the rear end of the housing, and a support column fixedly connected to the bottom of the housing.

[0006] With the above technical solution, operators can open the baffle with the handle to inspect and maintain the inside of the housing, which enhances the overall operability and maintainability. The support column is used to provide stable support and ensure long-term stable operation.

[0007] As a further improvement to the above solution, multiple heat exchange tubes are provided, and the air inlet pipe is located on the left side of the housing.

[0008] By using the above technical solution and setting up multiple heat exchange tubes, the heat exchange area between the flue gas before and after the reaction can be increased, thereby improving heat recovery efficiency, optimizing heat transfer, ensuring effective increase in flue gas temperature, and reducing heating energy consumption.

[0009] As a further improvement to the above solution, the heat exchange tube is made of stainless steel.

[0010] Through the above technical solutions, stainless steel materials have excellent corrosion resistance and are suitable for long-term use in high temperature and high humidity environments, thereby effectively extending the service life of the device.

[0011] As a further improvement to the above scheme, the denitrification mechanism includes a heating component, a combustion-supporting fan is fixedly connected to the bottom of the heating component, a connecting pipe is fixedly connected to the rear end of the heating component, an ammonia injection component is fixedly connected to the surface of the connecting pipe, and a reactor is fixedly connected to the other end of the connecting pipe.

[0012] The above technical solution, through the combined use of heating components and combustion fans, can effectively improve the heating efficiency of flue gas and ensure that the flue gas quickly reaches the reaction temperature required for denitrification.

[0013] As a further improvement to the above scheme, the heating component is located at the rear end of the housing, and the reactor is located on the left side of the housing.

[0014] As a further improvement to the above solution, the smoke exhaust mechanism includes an induced draft fan, a chimney is fixedly connected to one side of the exhaust pipe, and a base is fixedly connected to the bottom of the chimney.

[0015] Through the above technical solutions, the induced draft fan can effectively accelerate the discharge of flue gas, ensuring that the denitrified flue gas can be smoothly discharged to the chimney, and the base further improves the overall stability.

[0016] As a further improvement to the above solution, the induced draft fan is fixedly connected to the surface of the exhaust pipe, and the chimney is located on the right side of the casing.

[0017] Compared with the prior art, the beneficial effects of this utility model are as follows: This invention incorporates a flue gas temperature regulation mechanism. The denitrified flue gas enters multiple heat exchange tubes inside the shell through the inlet pipe. The temperature of the flue gas after the reaction is higher than that of the flue gas before entering the reactor, thus enabling sufficient heat exchange between the two. This preheats the flue gas before the reaction, reducing the energy consumption and operating costs of subsequent heating components and combustion fans, effectively recovering and utilizing heat, and further improving the overall thermal efficiency.

[0018] This invention heats the flue gas to the required temperature using a heating component and a combustion fan. Then, it effectively removes harmful gases from the flue gas through an ammonia injection component and a reactor, achieving the purpose of denitrification. After heat exchange, the flue gas is discharged into the chimney through an induced draft fan from the exhaust pipe, reducing environmental pollution and improving the stability and environmental efficiency of the entire device. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the overall structure of this utility model; Figure 2 This is a schematic diagram of the flue gas temperature regulating mechanism of this utility model; Figure 3 This is a second-view view of the flue gas temperature regulating mechanism of this utility model; Figure 4 This is a partial structural schematic diagram of the flue gas temperature regulating mechanism of this utility model; Figure 5 This is a schematic diagram of the denitrification mechanism of this utility model.

[0020] Explanation of key symbols: 1. Flue gas temperature regulation mechanism; 11. Shell; 12. Heat exchange tube; 13. Baffle; 14. Handle; 15. Inlet pipe; 16. Outlet pipe; 17. Fixed pipe; 18. Outlet; 19. Support column; 2. Denitrification mechanism; 21. Heating component; 22. Combustion fan; 23. Connecting pipe; 24. Ammonia injection component; 25. Reactor; 3. Smoke exhaust mechanism; 31. Exhaust fan; 32. Base; 33. Chimney. Detailed Implementation

[0021] The present invention will be further described below with reference to the accompanying drawings and specific embodiments. It should be noted that, without conflict, the various embodiments or technical features described below can be arbitrarily combined to form new embodiments.

[0022] Example: Please combine Figure 1-5 This embodiment of a low-temperature flue gas SCR denitrification device for the metallurgical industry includes a flue gas temperature regulating mechanism 1, a denitrification mechanism 2, and a flue gas exhaust mechanism 3. The flue gas temperature regulating mechanism 1 is located on one side of the flue gas exhaust mechanism 3, and the denitrification mechanism 2 is located at the rear end of the flue gas temperature regulating mechanism 1. The flue gas temperature regulating mechanism 1 includes a housing 11. A heat exchange tube 12 is fixedly connected to the inner wall of the housing 11. A baffle 13 is rotatably connected to the upper end of the inner wall of the housing 11. A handle 14 is fixedly connected to the upper end of the baffle 13. An air inlet pipe 15 is fixedly connected to one side of the housing 11. An air outlet pipe 16 is fixedly connected to the other side of the housing 11. A fixing pipe 17 is fixedly connected to the front end of the housing 11. An air outlet 18 is opened at the rear end of the housing 11. A support column 19 is fixedly connected to the bottom of the housing 11. The operator can open the baffle 13 through the handle 14 to inspect and maintain the inside of the housing 11, which enhances the overall operability and maintainability. The support column 19 is used to provide stable support to ensure long-term stable operation.

[0023] The number of heat exchange tubes 12 is set to multiple, and the air inlet pipe 15 is located on the left side of the shell 11. Setting multiple heat exchange tubes 12 can increase the heat exchange area between the flue gas before and after the reaction, thereby improving the heat recovery efficiency, optimizing heat transfer, ensuring the effective increase of flue gas temperature, and reducing heating energy consumption.

[0024] The heat exchange tube 12 is made of stainless steel, which has excellent corrosion resistance and is suitable for long-term use in high temperature and high humidity environments, thereby effectively extending the service life of the device.

[0025] The denitrification mechanism 2 includes a heating component 21. A combustion-supporting fan 22 is fixedly connected to the bottom of the heating component 21. A connecting pipe 23 is fixedly connected to the rear end of the heating component 21. An ammonia injection component 24 is fixedly connected to the surface of the connecting pipe 23. A reactor 25 is fixedly connected to the other end of the connecting pipe 23. The combined use of the heating component 21 and the combustion-supporting fan 22 can effectively improve the heating efficiency of the flue gas and ensure that the flue gas quickly reaches the reaction temperature required for denitrification.

[0026] The heating component 21 is located at the rear end of the shell 11, and the reactor 25 is located on the left side of the shell 11.

[0027] The exhaust system 3 includes an induced draft fan 31, a chimney 33 fixedly connected to one side of the exhaust pipe 16, and a base 32 fixedly connected to the bottom of the chimney 33. The induced draft fan 31 can effectively accelerate the exhaust of flue gas and ensure that the flue gas after denitrification can be smoothly discharged to the chimney 33. The base 32 further improves the overall stability.

[0028] The induced draft fan 31 is fixedly connected to the surface of the exhaust pipe 16, and the chimney 33 is located on the right side of the casing 11.

[0029] The implementation principle of a low-temperature flue gas SCR denitrification device for the metallurgical industry in this embodiment is as follows: The flue gas requiring denitrification enters the interior of the shell 11 through the fixed pipe 17, and then is transported to the interior of the heating component 21 through the outlet 18. The heating component 21 can effectively heat the flue gas through the combustion fan 22, thereby reaching the temperature required for subsequent reactions. After heating, the flue gas can be transported to the ammonia injection component 24 through the connecting pipe 23. The ammonia injection component 24 is responsible for uniformly injecting ammonia into the flue gas to ensure thorough mixing. Then, the flue gas and ammonia react inside the reactor 25 to achieve the purpose of denitrification. The denitrified flue gas enters multiple heat exchange tubes 12 inside the shell 11 through the inlet pipe 15. At this time, the fixed pipe 17 continues to continuously transport the total flue gas because the reaction... The temperature of the flue gas after the reaction is higher than that of the flue gas before the reaction. Therefore, when the total flue gas enters the interior of the shell 11, it will exchange heat with the flue gas after denitrification inside the heat exchange tube 12, thereby raising the temperature of the flue gas before the reaction. Then, it will be further heated by the subsequent heating component 21. Multiple heat exchange tubes 12 can separate and transport the flue gas after the reaction, so as to fully exchange heat with the flue gas before the reaction, thereby achieving effective heat recovery, further improving the utilization rate and reducing operating costs. After the gas after the reaction has exchanged heat inside the heat exchange tube 12, it is transported to the interior of the chimney 33 by the exhaust fan 31 through the exhaust pipe 16, reducing environmental pollution. Operators can open the baffle 13 by the handle 14 to inspect and maintain the interior of the shell 11, thereby improving the actual effect.

[0030] The above embodiments are merely preferred embodiments of this utility model and should not be construed as limiting the scope of protection of this utility model. Any non-substantial changes and substitutions made by those skilled in the art based on this utility model shall fall within the scope of protection claimed by this utility model.

Claims

1. A low-temperature flue gas SCR denitrification device for the metallurgical industry, characterized in that, It includes a flue gas temperature regulating mechanism (1), a denitrification mechanism (2) and a flue gas exhaust mechanism (3), wherein the flue gas temperature regulating mechanism (1) is located on one side of the flue gas exhaust mechanism (3) and the denitrification mechanism (2) is located at the rear end of the flue gas temperature regulating mechanism (1); The flue gas temperature regulating mechanism (1) includes a housing (11), a heat exchange tube (12) is fixedly connected to the inner wall of the housing (11), a baffle (13) is rotatably connected to the upper end of the inner wall of the housing (11), a handle (14) is fixedly connected to the upper end of the baffle (13), an air inlet pipe (15) is fixedly connected to one side of the housing (11), an air outlet pipe (16) is fixedly connected to the other side of the housing (11), a fixing pipe (17) is fixedly connected to the front end of the housing (11), an air outlet (18) is opened at the rear end of the housing (11), and a support column (19) is fixedly connected to the bottom of the housing (11).

2. The low-temperature flue gas SCR denitrification device for the metallurgical industry as described in claim 1, characterized in that: The number of heat exchange tubes (12) is multiple, and the air inlet pipe (15) is located on the left side of the shell (11).

3. The low-temperature flue gas SCR denitrification device for the metallurgical industry as described in claim 2, characterized in that: The heat exchange tube (12) is made of stainless steel.

4. The low-temperature flue gas SCR denitrification device for the metallurgical industry as described in claim 3, characterized in that: The denitrification mechanism (2) includes a heating component (21), a combustion fan (22) is fixedly connected to the bottom of the heating component (21), a connecting pipe (23) is fixedly connected to the rear end of the heating component (21), an ammonia injection component (24) is fixedly connected to the surface of the connecting pipe (23), and a reactor (25) is fixedly connected to the other end of the connecting pipe (23).

5. A low-temperature flue gas SCR denitrification device for the metallurgical industry as described in claim 4, characterized in that: The heating assembly (21) is located at the rear end of the housing (11), and the reactor (25) is located on the left side of the housing (11).

6. The low-temperature flue gas SCR denitrification device for the metallurgical industry as described in claim 5, characterized in that: The exhaust mechanism (3) includes an exhaust fan (31), a chimney (33) is fixedly connected to one side of the exhaust pipe (16), and a base (32) is fixedly connected to the bottom of the chimney (33).

7. A low-temperature flue gas SCR denitrification device for the metallurgical industry as described in claim 6, characterized in that: The induced draft fan (31) is fixedly connected to the surface of the exhaust pipe (16), and the chimney (33) is located on the right side of the shell (11).

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