Biomass water-cooling vibrating grate boiler SNCR (selective non-catalytic reduction) denitration device

Abstract

The utility model relates to the technical field of boiler denitration, and discloses an SNCR (selective non-catalytic reduction) denitration device of a biomass water-cooling vibrating grate boiler, which comprises a boiler body and a denitration mechanism arranged on one side of the boiler body, a purification mechanism is arranged at the top of the boiler body, and an exhaust pipe is arranged at the top of the purification mechanism. The inner wall of the exhaust pipe is respectively communicated with a first detection pipe and a second detection pipe, and one end of the first detection pipe and one end of the second detection pipe are respectively communicated with a control box. The harmful gases are prevented from forming acid rain after entering the atmosphere, damaging soil, a water source and an ecological system and affecting air quality, damage of the harmful gases to human health is effectively eradicated, the flue gas combustion process can be optimized through waste gas denitration, the energy utilization efficiency is improved, and fuel consumption and operation cost are reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of boiler denitration, in particular to a SNCR denitration device for a biomass water-cooled vibrating grate boiler. Background Art

[0002] The biomass water-cooled vibrating grate boiler is a boiler specifically designed for burning biomass fuels. It combines a water cooling system with vibrating grate technology to improve combustion efficiency and reduce pollutant emissions. Biomass fuels include a variety of organic waste materials such as wood chips, rice husks, corn straw, and palm shells. These fuels generally have low carbon emissions because they absorb carbon dioxide during their growth, and the carbon dioxide released during combustion is considered carbon neutral. The water cooling system primarily cools the grate and high-temperature areas within the boiler. Circulating water removes heat, maintaining the grate and boiler structure temperatures within a safe range, extending equipment life and improving operational stability. The vibrating grate uses mechanical vibration to loosen the fuel layer, increasing the contact area between air and fuel and promoting complete combustion. This design effectively reduces the formation of unburned materials and improves combustion efficiency.

[0003] When the existing biomass water-cooled vibrating grate boiler is in use, the flue gas in the boiler cannot be effectively treated, resulting in excessive nitrate content in the exhaust gas emissions. These harmful gases will form acid rain after entering the atmosphere, causing damage to the soil, water sources and ecosystems. Excessive emissions will aggravate photochemical pollution and affect air quality. The emitted harmful gases are harmful to human health and may cause health problems such as respiratory diseases and cardiovascular diseases. They may also pose a greater health threat to children, the elderly and people with respiratory diseases. At the same time, the failure to effectively denitrify the exhaust gas may mean that the combustion process is not optimized enough, which may lead to reduced energy utilization efficiency and increased fuel consumption and operating costs. Utility Model Content

[0004] The purpose of the utility model is to provide a SNCR denitrification device for a biomass water-cooled vibrating grate boiler to solve the problems raised in the above background technology.

[0005] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: a biomass water-cooled vibrating grate boiler SNCR denitrification device, comprising a boiler body, and further comprising:

[0006] A de-pinning mechanism is arranged on one side of the boiler body, and a purification mechanism for treating exhaust gas is arranged on the top of the boiler body. An exhaust pipe is arranged on the top of the purification mechanism, and the inner walls of the exhaust pipe are respectively connected to a first detection tube and a second detection tube, and one end of the first detection tube and the second detection tube are both connected to a control box, and the inner walls of the control box are respectively electrically connected to a first signal line and a second signal line.

[0007] Preferably, the destocking mechanism includes a urea tank arranged on one side of the boiler body, the inner wall of the urea tank is connected to a first feed pipe, one end of the first feed pipe is connected to a urea replenishing pump, the urea replenishing pump is electrically connected to one end of the first signal line, the inner wall of the urea replenishing pump is connected to a second feed pipe, one end of the second feed pipe is connected to an injection control cabinet, and the injection control cabinet is electrically connected to one end of the second signal line.

[0008] Preferably, the inner wall of the injection control cabinet is connected to a urea injection pipe, one end of the urea injection pipe is connected to a spray gun, the spray gun is fixed to the inner wall of the boiler body, the inner wall of the spray gun is connected to a gas cooling pipe, one end of the gas cooling pipe is connected to the inner wall of the injection control cabinet.

[0009] Preferably, the inner wall of the injection control cabinet is connected to a compressed air pipe, one end of the compressed air pipe is connected to an air storage tank, the inner wall of the air storage tank is connected to an air supply pipe, and one end of the air supply pipe is connected to an air compressor.

[0010] Preferably, the purification mechanism includes an outlet pipe connected to the top of the boiler body, a first flange is fixed to the top of the outlet pipe, a filter plate is provided on the top of the first flange, a second flange is provided on the top of the filter plate, and the second flange is fixed to the bottom end of the exhaust pipe.

[0011] Preferably, threaded holes are formed on the inner walls of the first flange, the filter plate and the second flange, screws are threadedly connected to the inner walls of the threaded holes, and nuts are threadedly connected to the outer sides of the screws.

[0012] Preferably, the inner walls of the first flange, the filter plate and the second flange are all provided with sealing grooves, and the inner walls of the sealing grooves are provided with sealing rings.

[0013] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0014] The utility model can carry out denitrification and purification treatment on the flue gas generated in the biomass water-cooled vibrating grate boiler by arranging a denitrification mechanism and a purification mechanism, so as to prevent these harmful gases from forming acid rain after entering the atmosphere and causing damage to the soil, water sources and ecosystems, and prevent excessive emissions from aggravating photochemical pollution and affecting air quality, and effectively prevent harmful gases from causing damage to human health. The exhaust gas denitrification can optimize the flue gas combustion process, improve energy utilization efficiency, and reduce fuel consumption and operating costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 This is a structural schematic diagram of a preferred embodiment of the SNCR denitrification device for a biomass water-cooled vibrating grate boiler provided by the utility model;

[0016] Figure 2 A schematic diagram of the structure of the destocking mechanism provided by the utility model;

[0017] Figure 3 A schematic diagram of the structure of the boiler body provided by the utility model;

[0018] Figure 4 This is a structural diagram of the purification mechanism provided by the utility model.

[0019] In the figure: 1. Boiler body; 2. Destocking mechanism; 21. Urea tank; 22. First feed pipe; 23. Urea replenishing pump; 24. Second feed pipe; 25. Injection control cabinet; 26. Urea injection pipe; 27. Spray gun; 28. Gas cooling pipe; 29. ​​Compressed air pipe; 210. Gas storage tank; 211. Gas pipe; 212. Air compressor; 3. Purification mechanism; 31. Exhaust pipe; 32. First flange; 33. Filter plate; 34. Second flange; 35. Threaded hole; 36. Screw; 37. Nut; 38. Sealing groove; 39. Sealing ring; 4. Exhaust pipe; 5. First detection tube; 6. Second detection tube; 7. Control box; 8. First signal line; 9. Second signal line. DETAILED DESCRIPTION

[0020] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only 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 are within the scope of protection of the present invention.

[0021] See also Figure 1-4As shown, a biomass water-cooled vibrating grate boiler SNCR denitrification device includes a boiler body 1. The boiler body 1 is provided as a boiler device for burning biomass fuel. The boiler body 1 combines a water cooling system and a vibrating grate technology to improve combustion efficiency and reduce pollutant emissions. The boiler body 1 also includes a denitrification mechanism 2 provided on one side of the boiler body 1. The denitrification mechanism 2 is provided to reduce nitrogen oxide (NOx) emissions. The top of the boiler body 1 is provided with a purification mechanism 3 for treating exhaust gas. The purification mechanism 3 can purify the exhaust gas. The top of the purification mechanism 3 is provided with an exhaust pipe 4. The exhaust pipe 4 can facilitate Exhaust gas is discharged from the boiler body 1; the inner wall of the exhaust pipe 4 is respectively connected to the first detection tube 5 and the second detection tube 6, which can be connected to the control box 7 by setting the first detection tube 5 and the second detection tube 6 to perform NOx detection and temperature detection respectively; one end of the first detection tube 5 and the second detection tube 6 are both connected to the control box 7, which can control the urea replenishing pump 23 and the injection control cabinet 25 by setting the control box 7; the inner wall of the control box 7 is electrically connected to the first signal line 8 and the second signal line 9, which can connect the control box 7 and the urea replenishing pump 23, and can connect the control box 7 and the injection control cabinet 25 by setting the second signal line 9.

[0022] See also Figure 1 and Figure 2As shown, the deactivation mechanism 2 includes a urea tank 21 arranged on one side of the boiler body 1, and the urea tank 21 is configured to store urea; the inner wall of the urea tank 21 is communicated with a first conveying pipe 22, and the first conveying pipe 22 is configured to communicate the urea tank 21 and a urea supplement pump 23; one end of the first conveying pipe 22 is communicated with the urea supplement pump 23, and the urea supplement pump 23 is configured to pump urea in the urea tank 21 out; the urea supplement pump 23 is electrically connected to one end of the first signal line 8, and the inner wall of the urea supplement pump 23 is communicated with a second conveying pipe 24; one end of the second conveying pipe 24 is communicated with a spraying control cabinet 25, and the second conveying pipe 24 is configured to communicate the spraying control cabinet 25 and the urea supplement pump 23; the spraying control cabinet 25 is configured to control the spraying of urea; one end of the spraying control cabinet 25 is electrically connected to the second signal line 9; the inner wall of the spraying control cabinet 25 is communicated with a urea spraying pipe 26, and the urea spraying pipe 26 is configured to convey urea to a spray gun 27; one end of the urea spraying pipe 26 is communicated with the spray gun 27, and the spray gun 27 is configured to spray urea in the boiler body 1; the spray gun 27 is fixed to the inner wall of the boiler body 1, and the inner wall of the spray gun 27 is communicated with a gas cooling pipe 28, which is configured to reduce the temperature of compressed air and convey gas; one end of the gas cooling pipe 28 is communicated with the inner wall of the spraying control cabinet 25; the inner wall of the spraying control cabinet 25 is communicated with a compressed air pipe 29, which is configured to convey compressed air to the spraying control cabinet 25; one end of the compressed air pipe 29 is communicated with a gas storage tank 210, and the gas storage tank 210 is configured to store compressed air; the inner wall of the gas storage tank 210 is communicated with a gas conveying pipe 211, and the gas conveying pipe 211 is configured to communicate an air compressor 212 and the gas storage tank 210; one end of the gas conveying pipe 211 is communicated with the air compressor 212, and the air compressor 212 is configured to generate compressed air.

[0023] Please refer to Figure 3 and Figure 4As shown, the purification mechanism 3 includes an outlet pipe 31 connected to the top of the boiler body 1. The outlet pipe 31 is provided to facilitate the discharge of exhaust gas in the boiler body 1; a first flange 32 is fixed to the top of the outlet pipe 31, a filter plate 33 is provided on the top of the first flange 32, a second flange 34 is provided on the top of the filter plate 33, and the second flange 34 is fixed to the bottom end of the exhaust pipe 4. The outlet pipe 31 and the exhaust pipe 4 can be connected by providing the first flange 32 and the second flange 34, and the exhaust gas can be filtered and purified by providing the filter plate 33; the inner walls of the first flange 32, the filter plate 33 and the second flange 34 are all open A threaded hole 35 is provided, the inner wall of the threaded hole 35 is threadedly connected to a screw 36, and the outer side of the screw 36 is threadedly connected to a nut 37. The threaded hole 35 can facilitate the installation of the screw 36, and the screw 36 and the nut 37 can facilitate the assembly and disassembly of the first flange 32, the filter plate 33 and the second flange 34. The inner walls of the first flange 32, the filter plate 33 and the second flange 34 are all provided with a sealing groove 38, and the inner wall of the sealing groove 38 is provided with a sealing ring 39. The sealing groove 38 and the sealing ring 39 can facilitate the improvement of the sealing performance of the connection between the first flange 32, the filter plate 33 and the second flange 34.

[0024] Working principle: The worker turns on the urea replenishing pump 23 and the injection control cabinet 25 through the control box 7. The urea replenishing pump 23 extracts the urea in the urea tank 21 and discharges it to the injection control cabinet 25 through the first feeding pipe 22 and the second feeding pipe 24. The injection control cabinet 25 delivers the urea to the spray gun 27 through the urea injection pipe 26, and sprays urea into the boiler body 1 to fully mix the urea and the flue gas. While spraying urea, the air compressor 212 generates compressed air and delivers it to the injection control cabinet 25 to improve the stability of urea injection. After the flue gas in the boiler body 1 is mixed and treated, the generated exhaust gas is discharged through the exhaust pipe 31, filtered and purified by the filter plate 33, and finally discharged into the air through the exhaust pipe 4. When the exhaust gas is discharged, it can be connected to the control box 7 through the first detection tube 5 and the second detection tube 6 to perform NOx detection and temperature detection respectively.

[0025] It should be noted that, in this document, relational terms such as first and second, etc., are used only to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply the existence of any such actual relationship or order between these entities or operations. Moreover, the terms "comprises," "comprising," or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article, or device comprising a series of elements includes not only those elements, but also other elements not explicitly listed, or elements inherent to such process, method, article, or device. In the absence of further limitations, an element defined by the phrase "comprising a ..." does not exclude the presence of other identical elements in the process, method, article, or device comprising the element.

[0026] Although the embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and variations may be made to these embodiments without departing from the principles and spirit of the present invention, and the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A biomass water-cooled vibrating grate boiler SNCR denitrification device, comprising a boiler body (1), characterized in that: Also includes: A de-pinning mechanism (2) is provided on one side of the boiler body (1); a purification mechanism (3) for treating exhaust gas is provided on the top of the boiler body (1); an exhaust pipe (4) is provided on the top of the purification mechanism (3); the inner wall of the exhaust pipe (4) is respectively connected to a first detection tube (5) and a second detection tube (6); one end of each of the first detection tube (5) and the second detection tube (6) is connected to a control box (7); the inner wall of the control box (7) is respectively electrically connected to a first signal line (8) and a second signal line (9).

2. The SNCR denitrification device for a biomass water-cooled vibrating grate boiler according to claim 1 is characterized in that: The destocking mechanism (2) comprises a urea tank (21) arranged on one side of the boiler body (1); the inner wall of the urea tank (21) is connected to a first delivery pipe (22); one end of the first delivery pipe (22) is connected to a urea replenishing pump (23); the urea replenishing pump (23) is electrically connected to one end of the first signal line (8); the inner wall of the urea replenishing pump (23) is connected to a second delivery pipe (24); one end of the second delivery pipe (24) is connected to an injection control cabinet (25); the injection control cabinet (25) is electrically connected to one end of the second signal line (9).

3. The SNCR denitrification device for a biomass water-cooled vibrating grate boiler according to claim 2, characterized in that: The inner wall of the injection control cabinet (25) is connected to a urea injection pipe (26), one end of the urea injection pipe (26) is connected to a spray gun (27), the spray gun (27) is fixed to the inner wall of the boiler body (1), the inner wall of the spray gun (27) is connected to a gas cooling pipe (28), one end of the gas cooling pipe (28) is connected to the inner wall of the injection control cabinet (25).

4. The SNCR denitrification device for a biomass water-cooled vibrating grate boiler according to claim 2, characterized in that: The inner wall of the injection control cabinet (25) is connected to a compressed air pipe (29), one end of the compressed air pipe (29) is connected to an air storage tank (210), the inner wall of the air storage tank (210) is connected to an air delivery pipe (211), and one end of the air delivery pipe (211) is connected to an air compressor (212).

5. The SNCR denitrification device for a biomass water-cooled vibrating grate boiler according to claim 1, characterized in that: The purification mechanism (3) includes an air outlet pipe (31) connected to the top of the boiler body (1), a first flange (32) is fixed to the top of the air outlet pipe (31), a filter plate (33) is provided on the top of the first flange (32), a second flange (34) is provided on the top of the filter plate (33), and the second flange (34) is fixed to the bottom end of the exhaust pipe (4).

6. The SNCR denitrification device for a biomass water-cooled vibrating grate boiler according to claim 5, characterized in that: The inner walls of the first flange (32), the filter plate (33) and the second flange (34) are all provided with threaded holes (35), the inner walls of the threaded holes (35) are threadedly connected to screw rods (36), and the outer sides of the screw rods (36) are threadedly connected to nuts (37).

7. The SNCR denitrification device for a biomass water-cooled vibrating grate boiler according to claim 5, characterized in that: The inner walls of the first flange (32), the filter plate (33) and the second flange (34) are all provided with sealing grooves (38), and the inner walls of the sealing grooves (38) are provided with sealing rings (39).

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