Self-adaptive low-temperature denitration device of industrial kiln

Abstract

The utility model relates to the technical field of denitration devices, and discloses an industrial kiln self-adaptive low-temperature denitration device which comprises a bottom frame, a denitration solution box, a denitration catalysis box and a support are installed on the bottom frame, an annular smoke outlet pipe is installed at the bottom of an inner cavity of the denitration solution box, and a plurality of smoke outlet holes are formed in the annular smoke outlet pipe. The bottom of the denitration solution box is provided with a motor, the motor is connected with a rotating rod, the rotating rod is fixedly connected with a stirring rod, the end part of the stirring rod is fixedly connected with a bubble cutter, the upper part of the denitration solution box is connected with a smoke outlet pipe, and the smoke outlet end of the smoke outlet pipe is connected with a denitration catalysis box; a heater is installed on the smoke inlet side of the smoke outlet pipe, a second fan is installed on the smoke outlet side of the smoke outlet pipe, and a denitration catalyst is arranged in the denitration catalytic box. According to the utility model, the flue gas can be fully contacted and reacted with denitration, and meanwhile, the flue gas can be heated, so that the catalytic reaction effect is ensured.

Description

Technical Field

[0001] The utility model belongs to the technical field of denitration devices, in particular to an adaptive low-temperature denitration device for an industrial kiln. Background Art

[0002] Industrial kilns are equipment made of refractory materials for calcining materials or firing products. During the use of industrial kilns, a large amount of flue gas is generated. These flue gases contain a large amount of nitrogen oxides, dust and other pollutants. The most common ones are NO, NO2 and other nitrates. Flue gas containing nitrogen oxides is directly discharged into the air without treatment, which will cause environmental pollution and damage. Nowadays, with the country's attention, promotion and control of environmental protection, low-temperature denitrification equipment is usually used in the production process of industrial kilns to denitrify and purify the flue gas, and then the purified flue gas is discharged into the atmosphere, thereby reducing pollution and damage to the environment.

[0003] After searching, it was found that a device for low-temperature destocking of an industrial furnace was published as announced with the number CN215388655U, and its main features are: it includes a purification box and a dust removal box, the dust removal box is fixedly installed on the top of the purification box, the top of the dust removal box is an open structure, and the top of the dust removal box is fixed with a box cover by screws, and a flue gas inlet pipe and an air supply pipe are fixedly installed on both sides of the dust removal box, and the flue gas inlet pipe and the air supply pipe are both connected to the inside of the dust removal box. The air supply pipe extends into the purification box at one end away from the dust removal box, and a dust filter and an activated carbon filter plate are fixedly installed in the dust removal box.

[0004] During actual use of the denitration device of the above application, the applicant found that after the above flue gas was put into the denitration liquid in the purification box, the contact area between the flue gas bubbles and the denitration liquid was small, and the initial denitration effect of the flue gas was limited, thereby increasing the burden of subsequent catalytic denitration and making the catalytic denitration maintenance frequent. At the same time, after the above flue gas entered the denitration liquid, it was bound to cause the loss of flue gas heat. At this time, the heat of the flue gas could not reach the optimal temperature for catalytic denitration, thereby affecting the effect of subsequent catalytic denitration. In order to solve the above problems, an adaptive low-temperature denitration device for an industrial kiln is proposed. Utility Model Content

[0005] The purpose of the utility model is to provide an industrial furnace self-adaptive low-temperature denitrification device in order to solve the above-mentioned problems.

[0006] The technical solution adopted by the present invention is as follows: an adaptive low-temperature denitration device for an industrial furnace, comprising a base frame, a denitration solution tank, a denitration catalytic tank and a bracket are installed on the base frame, an annular smoke outlet pipe is installed at the bottom of the inner cavity of the denitration solution tank, a plurality of smoke outlet holes are opened on the annular smoke outlet pipe, a smoke inlet pipe is connected to the annular smoke outlet pipe, a fan is installed on the smoke inlet pipe, a filter is installed on the smoke inlet pipe on the smoke inlet side of the fan, the fan and the filter are both installed on the bracket, the bottom of the denitration solution tank is fixed A motor is fixedly installed, the motor is connected to a rotating rod via an output shaft, a stirring rod is fixedly connected to the rotating rod, and a bubble cutter is fixedly connected to the end of the stirring rod. The upper part of the denitrification solution tank is connected to a smoke outlet pipe, and the smoke outlet end of the smoke outlet pipe is connected to the denitrification catalytic box. A heater is installed on the smoke inlet side of the smoke outlet pipe, and a second fan is installed on the smoke outlet side of the smoke outlet pipe. The second fan and the heater are both fixedly installed on the base frame. A denitrification catalyst is provided in the denitrification catalytic box, and the top of the denitrification catalytic box is connected to a smoke exhaust pipe.

[0007] The heater includes an outer tank body, an inner tank body is installed inside the outer tank body, an electric heating tube is installed between the inner tank body and the outer tank body, the inner wall of the inner tank body is constructed with hollow convex plates arranged in a left and right offset manner, a temperature measuring thermocouple is installed at the smoke inlet of the smoke outlet pipe, and the temperature measuring thermocouple and the electric heating tube are both externally connected to the PLC end.

[0008] In a preferred embodiment, the filter includes a box body and a filter screen, and the filter screen is installed inside the box body.

[0009] In a preferred embodiment, a water baffle installed in the denitrification catalyst box is provided at the lower portion of the denitrification catalyst.

[0010] In a preferred embodiment, a support rod is fixedly installed on the top end of the smoke exhaust pipe, and a rain shield is fixedly installed on the top end of the support rod.

[0011] In summary, due to the adoption of the above technical solution, the beneficial effects of the present invention are:

[0012] 1. In the present invention, the multiple smoke outlet holes of the annular smoke outlet pipe cooperate with the rotating bubble cutter to cut the bubbles, thereby dividing the bubbles into multiple small bubbles, thereby expanding the contact area between the smoke and the denitrification liquid, so that the smoke and the denitrification liquid can fully contact and react, thereby reducing the burden of the later catalytic reaction.

[0013] 2. In the present invention, the electric heating tube inside the heater provides heat to heat the flue gas, so that the flue gas reaches a suitable catalytic reaction temperature, thereby avoiding the flue gas temperature not meeting the standard and affecting the catalytic reaction. When the flue gas flows in the tank body, an S-shaped channel is formed between the hollow convex plates, thereby increasing the flow distance and time of the flue gas in the inner tank body, so that the flue gas is fully heated, and the hollow convex plates also assist in heat exchange and improve the heat exchange efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 This is a schematic diagram of the three-dimensional structure of the utility model;

[0015] Figure 2 This is a schematic diagram of the internal structure of the utility model;

[0016] Figure 3 This is a schematic diagram of the three-dimensional structure of the annular smoke outlet pipe in the present invention;

[0017] Figure 4 This is a schematic diagram showing the internal structure of the heater in the present invention.

[0018] Markings in the figure: 1-base frame, 2-desulfurization solution tank, 3-desulfurization catalyst tank, 4-bracket, 5-annular smoke outlet pipe, 6-smoke outlet hole, 7-smoke inlet pipe, 8-blower 1, 9-filter, 10-motor, 11-rotating rod, 12-stirring rod, 13-bubble cutter, 14-smoke outlet pipe, 15-heater, 16-blower 2, 17-desulfurization catalyst, 18-smoke exhaust pipe, 19-outer tank body, 20-inner tank body, 21-electric heating tube, 22-hollow convex plate, 23-temperature measuring thermocouple, 24-filter, 25-box body, 26-water retaining plate, 27-support rod, 28-rain shield. DETAILED DESCRIPTION

[0019] To make the purpose, technical solutions, and advantages of the embodiments of the present invention more clear, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the embodiments of the present invention. Obviously, the embodiments described are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts shall fall within the scope of protection of the present invention.

[0020] The following will be combined Figures 1-4 An adaptive low-temperature denitrification device for an industrial kiln according to an embodiment of the present utility model is described in detail.

[0021] Example

[0022] The utility model provides an industrial furnace adaptive low-temperature denitrification device, referring to Figures 1 to 4As shown, it includes a base frame 1, on which a denitrification solution tank 2, a denitrification catalytic tank 3 and a bracket 4 are installed. An annular smoke outlet pipe 5 is installed at the bottom of the inner cavity of the denitrification solution tank 2. The annular smoke outlet pipe 5 is provided with multiple smoke outlet holes 6. The annular smoke outlet pipe 5 is connected to a smoke inlet pipe 7. A fan 1 8 is installed on the smoke inlet pipe 7. The fan 1 8 is installed on the bracket 4. The upper part of the denitrification solution tank 2 is connected to a smoke outlet pipe 14. The smoke outlet end of the smoke outlet pipe 14 is connected to the denitrification catalytic tank 3. A fan 2 16 is installed on the smoke outlet side of the smoke outlet pipe 14. The fan 2 16 and the heater 15 are fixedly mounted on the base frame. 1, a denitrification catalyst 17 is provided in the denitrification catalyst box 3, and a smoke exhaust pipe 18 is connected to the top of the denitrification catalyst box 3. In this structure, the fan 1 8 introduces the flue gas from the smoke outlet pipe 14 into the annular smoke outlet pipe 5, and discharges the flue gas from the smoke outlet hole 6 of the annular smoke outlet pipe 5 into the denitrification liquid in the denitrification solution tank 2, thereby performing preliminary denitrification on the flue gas. Then, the flue gas after preliminary denitrification is introduced into the denitrification catalyst box 3 under suction by the fan 2 16, and then undergoes a catalytic reaction with the internal denitrification catalyst 17, thereby fully denitrifying the flue gas. The denitrified flue gas is then discharged from the smoke exhaust pipe 18.

[0023] refer to Figures 1 to 4 As shown, a motor 10 is fixedly installed at the bottom of the denitrification solution tank 2. The motor 10 is connected to a rotating rod 11 via an output shaft. A stirring rod 12 is fixedly connected to the rotating rod 11. A bubble cutter 13 is fixedly connected to the end of the stirring rod 12. In this structure, the motor 10 drives the stirring rod 12 on the rotating rod 11 to rotate, thereby stirring the solution so that the solution and bubbles fully react. At the same time, the stirring rod 12 can drive the bubble cutter 13 to rotate. The bubble cutter 13 is used to cut the flue gas bubbles discharged from the smoke outlet 6, thereby dividing the bubbles into multiple small bubbles, thereby expanding the contact area between the flue gas and the denitrification solution, so that the flue gas and the denitrification solution fully contact and react, thereby reducing the burden of the later catalytic reaction.

[0024] refer to Figures 1 to 4 As shown, a heater 15 is installed on the smoke inlet side of the smoke outlet pipe 14. The heater 15 includes an outer tank body 19, an inner tank body 20 is installed inside the outer tank body 19, and an electric heating tube 21 is installed between the inner tank body 20 and the outer tank body 19. The inner wall of the inner tank body 20 is constructed with hollow convex plates 22 that are staggered left and right. A temperature measuring thermocouple 23 is installed at the smoke inlet of the smoke outlet pipe 14. The temperature measuring thermocouple 23 and the electric heating tube 21 are both externally connected to the PLC end. This structure utilizes that the initially depleted flue gas will enter the electric heater 15. At this time, the internal electric heating tube 21 will provide heat to heat the flue gas, so that the flue gas reaches a suitable catalytic reaction temperature, thereby avoiding the catalytic reaction being affected by the flue gas temperature not meeting the standard. When the flue gas flows in the tank body 20, an S-shaped channel is formed between the hollow convex plates 22, thereby increasing the flow distance and time of the flue gas in the inner tank body 20, so that the flue gas is fully heated, and the hollow pattern spots 22 will also assist in heat exchange, thereby improving the heat exchange efficiency.

[0025] When in use, the temperature measuring thermocouple 23 will detect the temperature of the flue gas entering the flue gas outlet pipe 14, and then the PLC end will control the operating power of the electric heater 15 according to the flue gas outlet temperature, thereby realizing adaptive heating.

[0026] It should be noted that the temperature measuring thermocouple 23 is an existing device, specifically model WRK-13Y, and the PLC control equipment and programs involved in the above embodiments are all time-sensitive technologies, again not too much or too little.

[0027] refer to Figures 1 to 4 As shown, a filter 9 is installed on the smoke inlet pipe 7 on the smoke inlet side of the fan 8. The filter 9 is installed on the bracket 4. The filter 9 includes a box 25 and a filter screen 24. The filter screen 24 is installed inside the box 25. This structure uses the filter screen 24 inside the filter 9 to filter the dust in the smoke.

[0028] refer to Figures 1 to 4 As shown, a water baffle 26 installed in the denitrification catalyst box 3 is provided at the lower part of the denitrification catalyst 17. In this structure, the water baffle 26 is used to remove water from the initially denitrified flue gas.

[0029] refer to Figures 1 to 4 As shown, a support rod 27 is fixedly installed on the top of the smoke exhaust pipe 18, and a rain shield 28 is fixedly installed on the top of the support rod 27. This structure uses the rain shield 28 to prevent rainwater from entering the smoke exhaust pipe 18.

[0030] The implementation principle of the self-adaptive low-temperature denitration device for an industrial furnace in the embodiment of the present application is as follows: when in use, the fan 8 introduces the flue gas from the flue gas outlet pipe 14 into the annular flue gas outlet pipe 5. At this time, the filter screen 24 will filter the dust in the flue gas, and then the flue gas will be discharged into the denitration liquid in the denitration solution tank 2 through the flue gas outlet hole 6 of the annular flue gas outlet pipe 5. The motor 10 drives the stirring rod 12 on the rotating rod 11 to rotate, thereby stirring the solution so that the solution and the bubbles fully react. At the same time, the stirring rod 12 can drive the bubble cutter 13 to rotate, and the bubble cutter 13 is used to cut the flue gas bubbles discharged from the flue gas outlet 6, thereby dividing the bubbles into multiple small bubbles, thereby expanding the contact area between the flue gas and the denitration liquid, so that the flue gas and the denitration liquid fully contact and react, thereby The flue gas is initially denitrified, and then the denitrified flue gas is introduced into the denitrification catalytic box 3 under suction by the second fan 16. During this process, the temperature measuring thermocouple 23 will detect the temperature of the flue gas entering the smoke outlet pipe 14 and the flue gas will pass through the heater 15. At this time, the electric heating tube 21 inside the heater 15 will be adjusted to an appropriate power to heat the flue gas, so that the flue gas reaches a suitable catalytic reaction temperature. When the flue gas flows in the tank body 20, an S-shaped channel is formed between the hollow convex plates 22, thereby increasing the flow distance and time of the flue gas in the inner tank body 20. Then, the flue gas after reaching the temperature standard will undergo a catalytic reaction with the denitrification catalyst 17 inside the denitrification catalytic box 3, thereby fully denitrifying the flue gas. The denitrified flue gas will be discharged from the exhaust pipe 18.

[0031] The above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit the same. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that the technical solutions described in the aforementioned embodiments can still be modified, or some of the technical features thereof can be replaced by equivalents. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the various embodiments of the present invention.

Claims

1. An industrial furnace adaptive low-temperature denitrification device, comprising a base frame (1), characterized in that: The base frame (1) is provided with a denitrification solution tank (2), a denitrification catalytic tank (3) and a bracket (4); an annular smoke outlet pipe (5) is provided at the bottom of the inner cavity of the denitrification solution tank (2); a plurality of smoke outlet holes (6) are provided on the annular smoke outlet pipe (5); a smoke inlet pipe (7) is connected to the annular smoke outlet pipe (5); a fan (8) is provided on the smoke inlet pipe (7); a filter (9) is provided on the smoke inlet pipe (7) on the smoke inlet side of the fan (8); the fan (8) and the filter (9) are both provided on the bracket (4); a motor (10) is fixedly provided at the bottom of the denitrification solution tank (2); the motor (10) is connected to the rotating rod (1) via an output shaft. 1), a stirring rod (12) is fixedly connected to the rotating rod (11), a bubble cutter (13) is fixedly connected to the end of the stirring rod (12), a smoke outlet pipe (14) is connected to the upper part of the denitrification solution tank (2), a smoke outlet end of the smoke outlet pipe (14) is connected to the denitrification catalytic tank (3), a heater (15) is installed on the smoke inlet side of the smoke outlet pipe (14), a second fan (16) is installed on the smoke outlet side of the smoke outlet pipe (14), the second fan (16) and the heater (15) are both fixedly installed on the base frame (1), a denitrification catalyst (17) is provided in the denitrification catalytic tank (3), and a smoke exhaust pipe (18) is connected to the top end of the denitrification catalytic tank (3); The heater (15) comprises an outer tank body (19), an inner tank body (20) is installed inside the outer tank body (19), an electric heating pipe (21) is installed between the inner tank body (20) and the outer tank body (19), the inner wall of the inner tank body (20) is constructed with a hollow convex plate (22) staggered left and right, a temperature measuring thermocouple (23) is installed at the smoke inlet of the smoke outlet pipe (14), and the temperature measuring thermocouple (23) and the electric heating pipe (21) are both externally connected to the PLC end.

2. The self-adaptive low-temperature denitration device for an industrial furnace according to claim 1, characterized in that: The filter (9) comprises a box (25) and a filter screen (24), wherein the filter screen (24) is installed inside the box (25).

3. The self-adaptive low-temperature denitration device for an industrial furnace according to claim 1, characterized in that: A water baffle (26) installed in the desulfurized catalyst box (3) is provided at the lower part of the desulfurized catalyst (17).

4. The self-adaptive low-temperature denitrification device for an industrial furnace according to claim 1, characterized in that: A support rod (27) is fixedly mounted on the top end of the smoke exhaust pipe (18), and a rain shield (28) is fixedly mounted on the top end of the support rod (27).

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