Device for pyrolyzing urea in denitration system by using flue gas waste heat

Abstract

The device comprises a bottom plate, a gas inlet pipe, a urea atomization spray pipe and an exhaust pipe, a pyrolysis heat preservation box and a square sleeve are fixed to the two ends of the upper surface of the bottom plate respectively, a square column is movably installed on the inner wall of the square sleeve, a pressing rod is movably connected to the inner wall of the upper end of the square column, and a gas inlet pipe is arranged on the gas inlet pipe. A gas inlet pipe is fixed to the upper end of the pyrolysis heat preservation box in a penetrating mode, a urea atomization spray pipe is arranged on the portion, on the side of the gas inlet pipe, of the surface of the pyrolysis heat preservation box in a penetrating mode, a heat preservation cover is movably connected to the outer wall of the end of the pyrolysis heat preservation box, and a filtering mechanism is arranged on the outer wall of the end of an exhaust pipe. A sealing ring is fixedly connected to the inner wall of the heat preservation cover on the side of the filtering mechanism. The device for pyrolyzing the urea of the denitration system by using the flue gas waste heat is convenient to disassemble for cleaning the device and the filter screen, so that the normal use of the device is prevented from being influenced by impurity accumulation.

Description

Technical Field

[0001] The utility model relates to the technical field of urea pyrolysis devices, in particular to a device for thermally decomposing urea in a denitration system by using waste heat of flue gas. Background Technique

[0002] Urea for the denitration system refers to the urea raw material for preparing ammonia for denitration, and the device for thermally decomposing urea in the denitration system by using waste heat of flue gas refers to a device that recovers high-temperature flue gas in industry, enables the high-temperature flue gas to participate in the pyrolysis treatment of urea, and thus prepares ammonia. Its main function is to give full play to the role of high-temperature flue gas and avoid waste of thermal resources caused by direct emission of high-temperature flue gas.

[0003] However, the existing devices for thermally decomposing urea in the denitration system by using waste heat of flue gas have the following problems when in use:

[0004] Since the device for thermally decomposing urea in the denitration system by using waste heat of flue gas will filter the pyrolyzed ammonia through a filter screen during use, impurities will accumulate inside the filter screen and the device. Therefore, it is necessary to clean the filter screen and the device in time. However, the existing devices for thermally decomposing urea in the denitration system by using waste heat of flue gas are not convenient to disassemble, resulting in difficulty in cleaning the device and the filter screen, which easily affects the normal use of the device.

[0005] In view of the above problems, it is urgent to innovate and design on the basis of the original device for thermally decomposing urea in the denitration system by using waste heat of flue gas. Content of the Utility Model

[0006] The purpose of the utility model is to provide a device for thermally decomposing urea in a denitration system by using waste heat of flue gas, so as to solve the problem that the existing device for thermally decomposing urea in the denitration system by using waste heat of flue gas is not convenient to disassemble for cleaning the device and the filter screen, thus easily affecting the normal use of the device as mentioned in the above background technique.

[0007] To achieve the above purpose, the utility model provides the following technical solution: A device for thermally decomposing urea in a denitration system by using waste heat of flue gas, including a bottom plate, an air inlet pipe, a urea atomizing spray pipe and an exhaust pipe. At both ends of the upper surface of the bottom plate, a pyrolysis heat preservation box and a square sleeve are respectively fixed. A square column is movably installed inside the square sleeve. The upper end inner wall of the square column is movably connected with a pressure rod. Moreover, a pressing plate is movably arranged at the end of the pressure rod. The upper end of the pyrolysis heat preservation box is fixedly penetrated with an air inlet pipe. The surface of the pyrolysis heat preservation box on the side of the air inlet pipe is penetrated with a urea atomizing spray pipe. Moreover, the outer wall of the end of the pyrolysis heat preservation box is movably connected with a heat preservation cover. A sealing gasket is adhered to the inner wall of the heat preservation cover. At the same time, the upper end of the heat preservation cover is fixedly penetrated with an exhaust pipe. A filtering mechanism is arranged on the outer wall of the end of the exhaust pipe. A sealing ring is fixedly connected to the inner wall of the heat preservation cover on the side of the filtering mechanism.

[0008] Preferably, the square sleeve and the square column form a sliding structure, the square column is threadedly connected to the pressure rod, and the pressure rod and the pressing plate are rotatably arranged.

[0009] Preferably, a retaining sleeve is fixedly installed on the outer wall of the heat preservation cover on the side of the pressing plate, the retaining sleeve is slidably connected to the pressing plate, and the pressing plate is in fit with the heat preservation cover.

[0010] Preferably, the heat preservation cover and the pyrolysis heat preservation box are slidably arranged, and the pyrolysis heat preservation box is in fit connection with the sealing gasket.

[0011] Preferably, the filtering mechanism includes a filter cylinder and a filter screen, the filter cylinder is movably installed on the outer wall of the end of the exhaust pipe, and the filter screen is fixedly arranged on the inner wall of the filter cylinder.

[0012] Preferably, the filter cylinder is threadedly arranged with the exhaust pipe, and the filter cylinder is in fit with the sealing ring.

[0013] Compared with the prior art, the beneficial effect of the present utility model is that the device for urea in the flue gas waste heat pyrolysis denitrification system is convenient for disassembly to clean the device and the filter screen, thereby avoiding the accumulation of impurities and affecting the normal use of the device;

[0014] By rotating the pressure rod, the pressing plate is disengaged from the retaining sleeve, and then by moving the heat preservation cover, the heat preservation cover is disengaged from the pyrolysis heat preservation box, thereby completing the disassembly of the device. Then, by rotating the filter cylinder, the filter cylinder is disengaged from the exhaust pipe, thereby completing the disassembly of the filter screen, and further facilitating the user to clean the inside of the device and the filter screen. Therefore, the device is convenient for disassembly to clean the device and the filter screen, thereby avoiding the accumulation of impurities and affecting the normal use of the device. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 is a schematic front sectional structure view of the present utility model;

[0016] Figure 2 is a schematic front sectional structure view of the present utility model in a disassembled state;

[0017] Figure 3 is a schematic top view structure view of the square column of the present utility model;

[0018] Figure 4 is the present utility model Figure 1 The enlarged structure view at A in.

[0019] In the figure: 1, bottom plate; 2, pyrolysis heat preservation box; 3, square sleeve; 4, square column; 5, pressure rod; 6, pressing plate; 7, intake pipe; 8, urea atomizing spray pipe; 9, heat preservation cover; 10, sealing gasket; 11, exhaust pipe; 12, filtering mechanism; 1201, filter cylinder; 1202, filter screen; 13, sealing ring; 14, retaining sleeve. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0020] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0021] Please refer to Figures 1-4 , the present invention provides a technical solution: a device for thermally decomposing urea in a denitrification system using flue gas waste heat, including a bottom plate 1, a pyrolysis insulation box 2, a square sleeve 3, a square column 4, a pressure rod 5, a pressing plate 6, an air inlet pipe 7, a urea atomizing spray pipe 8, a heat preservation cover 9, a sealing gasket 10, an exhaust pipe 11, a filtering mechanism 12, a filter cartridge 1201, a filter screen 1202, a sealing ring 13 and a clamping sleeve 14. At both ends of the upper surface of the bottom plate 1, a pyrolysis insulation box 2 and a square sleeve 3 are respectively fixed. A square column 4 is movably installed inside the square sleeve 3. The upper end inner wall of the square column 4 is movably connected to a pressure rod 5. The end of the pressure rod 5 is movably provided with a pressing plate 6. The air inlet pipe 7 is fixedly penetrated through the upper end of the pyrolysis insulation box 2. The urea atomizing spray pipe 8 is penetrated through the surface of the pyrolysis insulation box 2 on the side of the air inlet pipe 7. The end outer wall of the pyrolysis insulation box 2 is movably connected to a heat preservation cover 9. A sealing gasket 10 is adhered to the inner wall of the heat preservation cover 9. At the same time, the exhaust pipe 11 is fixedly penetrated through the upper end of the heat preservation cover 9. A filtering mechanism 12 is provided on the end outer wall of the exhaust pipe 11. A sealing ring 13 is fixedly connected to the inner wall of the heat preservation cover 9 on the side of the filtering mechanism 12.

[0022] The square sleeve 3 and the square column 4 form a sliding structure, and the square column 4 and the pressure rod 5 are threadedly connected, and the pressure rod 5 and the pressing plate 6 are rotatably arranged, which is convenient for the user to move the square column 4 for disassembling the square column 4, so as to avoid the square column 4 interfering with the user to clean the inside of the pyrolysis insulation box 2, and is convenient for the user to rotate the pressure rod 5, so that the pressure rod 5 moves relative to the square column 4, thereby pushing the pressing plate 6 to move.

[0023] A clamping sleeve 14 is fixedly installed on the outer wall of the heat preservation cover 9 on the side of the pressing plate 6. The clamping sleeve 14 and the pressing plate 6 are slidably connected, and the pressing plate 6 and the heat preservation cover 9 are in contact with each other, which is convenient for the pressing plate 6 to move and insert into the clamping sleeve 14 to be in contact with the heat preservation cover 9, so that the heat preservation cover 9 is stably installed on the pyrolysis insulation box 2.

[0024] The heat preservation cover 9 and the pyrolysis insulation box 2 are slidably arranged, and the pyrolysis insulation box 2 and the sealing gasket 10 are in contact connection, which is convenient for the heat preservation cover 9 to slide relative to the pyrolysis insulation box 2 for disassembly and assembly of the heat preservation cover 9, and to improve the sealing performance of the pyrolysis insulation box 2 through the sealing gasket 10.

[0025] The filtering mechanism 12 includes a filter cartridge 1201 and a filter screen 1202. The filter cartridge 1201 is movably installed on the outer wall of the end of the exhaust pipe 11, and the filter screen 1202 is fixedly arranged on the inner wall of the filter cartridge 1201, which is convenient for filtering the ammonia gas prepared in the pyrolysis insulation box 2 through the filtering mechanism 12 to avoid impurities being mixed into the ammonia gas.

[0026] The filter cartridge 1201 and the exhaust pipe 11 are threadedly arranged, and the filter cartridge 1201 and the sealing ring 13 are fitted together, which is convenient for the user to rotate the filter cartridge 1201 for disassembly and assembly of the filter cartridge 1201, and the sealing performance of the filtering mechanism 12 installed on the exhaust pipe 11 is improved through the sealing ring 13.

[0027] Working principle: When using the device for pyrolyzing urea by utilizing the waste heat of flue gas for denitrification, first as Figure 1 and Figure 4 shown, the user moves the bottom plate 1 to the working position, then the user connects the intake pipe 7 with the high-temperature flue gas pipeline, and then the user connects the exhaust pipe 11 with the denitrification system. When the device is working, the high-temperature flue gas enters the pyrolysis insulation box 2 through the intake pipe 7. At the same time, the user starts the urea atomizing nozzle 8. At this time, the urea atomizing nozzle 8 atomizes and sprays out the urea solution. Then, the high-temperature flue gas and the atomized urea solution are fully mixed, so as to pyrolyze the urea into ammonia gas and other substances. Next, the ammonia gas enters the exhaust pipe 11 through the filtering mechanism 12, and then the ammonia gas enters the denitrification system through the exhaust pipe 11 for use. At the same time, the filter screen 1202 filters the ammonia gas to avoid impurities being mixed into the ammonia gas. Then, when the impurities accumulated inside the device and on the filter screen 1202 need to be cleaned, as Figures 1-4 shown, the user stops injecting the high-temperature flue gas, closes the urea atomizing nozzle 8, and at the same time disconnects the exhaust pipe 11 from the denitrification system. Then the user rotates the pressure rod 5. Next, the pressure rod 5 moves relative to the square column 4 and drives the pressing plate 6 away from the ferrule 14. Then the user moves the square column 4 so that the square column 4 disengages from the square sleeve 3. Then the user moves the heat preservation cover 9 so that the heat preservation cover 9 and the sealing gasket 10 disengage from the pyrolysis insulation box 2, thus completing the disassembly of the device. Next, the user rotates the filter cartridge 1201 so that the filter cartridge 1201 disengages from the heat preservation cover 9 and the sealing ring 13, thus completing the disassembly of the filter screen 1202. At this time, the user can clean the filter screen 1202 and the pyrolysis insulation box 2. Therefore, the device is convenient for disassembly to clean the device and the filter screen 1202, so as to avoid the accumulation of impurities affecting the normal use of the device.

[0028] Although the present invention has been described in detail with reference to the foregoing embodiments, for those skilled in the art, they can still modify the technical solutions described in the foregoing embodiments, or perform equivalent replacements for some of the technical features. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention shall be included within the protection scope of the present invention.

Claims

1. A device for thermally removing urea from a denitrification system by utilizing flue gas waste heat, comprising a base plate (1), an air intake pipe (7), a urea atomizing nozzle (8) and an exhaust pipe (11), characterized in that: A pyrolysis insulation box (2) and a square sleeve (3) are fixed to both ends of the upper surface of the bottom plate (1), and a square column (4) is movably mounted on the inner wall of the square sleeve (3), and a pressure rod (5) is movably connected to the inner wall of the upper end of the square column (4), and a pressure plate (6) is movably arranged at the end of the pressure rod (5), an air intake pipe (7) is fixedly penetrated through the upper end of the pyrolysis insulation box (2), and a urea atomizing nozzle (8) is penetrated through the surface of the pyrolysis insulation box (2) on the side of the air intake pipe (7), and an insulation cover (9) is movably connected to the outer wall of the end of the pyrolysis insulation box (2), and a sealing gasket (10) is bonded to the inner wall of the insulation cover (9), and an exhaust pipe (11) is fixedly penetrated through the upper end of the insulation cover (9), a filter mechanism (12) is arranged on the outer wall of the end of the exhaust pipe (11), and a sealing ring (13) is fixedly connected to the inner wall of the insulation cover (9) on the side of the filter mechanism (12).

2. The device for thermally removing urea from a denitrification system using waste heat from flue gas according to claim 1, characterized in that: The square sleeve (3) and the square column (4) form a sliding structure, the square column (4) and the pressure rod (5) are threadedly connected, and the pressure rod (5) and the pressure plate (6) are rotatably arranged.

3. The device for thermally removing urea from a denitrification system using flue gas waste heat according to claim 1, characterized in that: A clamping sleeve (14) is fixedly mounted on the outer wall of the heat-insulating cover (9) on the side of the pressing plate (6), and the clamping sleeve (14) and the pressing plate (6) are slidably connected, and the pressing plate (6) and the heat-insulating cover (9) are in close contact with each other.

4. The device for thermally removing urea from a denitrification system using waste heat from flue gas according to claim 1, characterized in that: The heat-insulating cover (9) and the pyrolysis heat-insulating box (2) are arranged to slide, and the pyrolysis heat-insulating box (2) and the sealing gasket (10) are connected in a close fit.

5. The device for thermally removing urea from a denitrification system using flue gas waste heat according to claim 1, characterized in that: The filtering mechanism (12) comprises a filter cartridge (1201) and a filter screen (1202), wherein the filter cartridge (1201) is movably mounted on the outer wall of the end of the exhaust pipe (11), and the filter screen (1202) is fixedly arranged on the inner wall of the filter cartridge (1201).

6. The device for thermally removing urea from a denitrification system by utilizing flue gas waste heat according to claim 5, characterized in that: The filter cartridge (1201) and the exhaust pipe (11) are threadedly arranged, and the filter cartridge (1201) and the sealing ring (13) are fitted together.

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