Denitration heat recovery device with self-cleaning heat exchange pipe

Abstract

The utility model relates to denitration heat recovery ware technical field, and disclose a kind of denitration heat recovery ware of heat exchange tube self-cleaning, including box, the top of the box is fixedly connected with controller, the inside of the box is equipped with heat exchange tube, the top of the box is fixedly connected with water storage tank, the top of the water storage tank is fixedly connected with water pump, water delivery pipe is fixedly connected on the lateral wall of the water storage tank, support frame is fixedly connected on the lateral wall of the box, the top of the support frame is fixedly connected with booster tank The pressure sensor fixed at the bottom of the slide provided in the utility model is used to monitor the water pressure in the booster tank, when the pressure reaches the preset threshold, the pressure sensor transmits the signal to the controller, the controller controls the solenoid valve on the return pipe wall to open, the high-pressure cleaning water enters the heat exchange tube inside through the return pipe, and the impact force of high-pressure water flow is used to flush the accumulated ash and dirt adhered to the inner wall of the heat exchange tube, to realize the self-cleaning of the heat exchange tube.

Description

Technical Field

[0001] This utility model relates to the technical field of denitrification heat recovery devices, and in particular to a denitrification heat recovery device with self-cleaning heat exchange tubes. Background Technology

[0002] Denitrification heat recovery units are key equipment in flue gas treatment systems of thermal power plants, waste incineration plants, and industrial boilers. Their core function is to recover the waste heat of flue gas before and after denitrification, while ensuring the stable operation of the denitrification system. Their design and application must be closely integrated with the temperature requirements of the denitrification process to balance the waste heat recovery efficiency with the denitrification reaction conditions.

[0003] In the existing technology, during the use of denitrification heat recovery equipment, after a long period of use, impurities will accumulate inside the heat exchange tubes. In order to ensure the heat exchange effect, the heat exchange tubes have a relatively twisted structure, which makes it difficult to clean them. Utility Model Content

[0004] The purpose of this invention is to solve the problem that in the existing technology of denitrification heat recovery device, after a long period of use, impurities will accumulate inside the heat exchange tubes. In order to ensure the heat exchange effect, the heat exchange tubes have a relatively distorted structure, which makes it difficult to clean them. Therefore, this invention proposes a denitrification heat recovery device with self-cleaning heat exchange tubes.

[0005] To achieve the above objectives, the present invention adopts the following technical solution: A self-cleaning denitrification heat recovery device for heat exchange tubes includes a housing. A controller is fixedly connected to the top of the housing. Heat exchange tubes are installed inside the housing. A water storage tank is fixedly connected to the top of the housing. A water pump is fixedly connected to the top of the water storage tank. A water delivery pipe is fixedly connected to the side wall of the water storage tank. A support frame is fixedly connected to the side wall of the housing. A booster box is fixedly connected to the top of the support frame. A return pipe is fixedly connected to the side wall of the booster box. A solenoid valve is fixedly connected to the wall of the return pipe. The end of the return pipe away from the booster box extends into the interior of the heat exchange tubes.

[0006] Preferably, the heat exchange tube is configured as a serpentine tube.

[0007] Preferably, an elastic metal plate is fixedly connected to the inner wall of the pressurization chamber, and a sliding plate is fixedly connected to the bottom of the elastic metal plate, the sliding plate being slidably disposed on the inner wall of the pressurization chamber.

[0008] Preferably, a pressure sensor is fixedly connected to the bottom of the skateboard.

[0009] Preferably, the top inner wall of the booster box has an opening, and an end cap is inserted into the inner wall of the booster box at the opening.

[0010] Preferably, the connection between the end cap and the pressurization box is also threaded with mounting bolts.

[0011] Preferably, one end of the water supply pipe and return pipe inside the booster box is located below the slide plate.

[0012] Compared with the prior art, this utility model provides a denitrification heat recovery device with self-cleaning heat exchange tubes, which has the following beneficial effects: 1. This self-cleaning denitrification heat recovery unit uses a pressure sensor fixed at the bottom of the slide plate to monitor the water pressure in the booster tank. When the pressure reaches a preset threshold, the pressure sensor transmits a signal to the controller. The controller then controls the solenoid valve on the return pipe wall to open, allowing high-pressure cleaning water to enter the heat exchange tube through the return pipe. The impact force of the high-pressure water flow washes away the accumulated dust and dirt on the inner wall of the heat exchange tube, achieving self-cleaning of the heat exchange tube. After cleaning, the controller closes the solenoid valve, the water pump stops supplying water, the elastic metal plate returns to its original shape, and the slide plate descends and resets, ready for the next cleaning operation. 2. This self-cleaning denitrification heat recovery unit uses a pressurization chamber to pressurize the clean water. The elastic metal plate fixed to its inner wall has elastic deformation capability, and the sliding plate connected to the bottom can slide along the inner wall of the pressurization chamber. As clean water continuously enters the bottom of the pressurization chamber, the water pressure inside the chamber gradually increases, pushing the sliding plate upward and compressing the elastic metal plate. As the water pressure further increases, the reaction force of the elastic metal plate keeps the clean water at a high pressure, providing conditions for subsequent high-pressure cleaning of the heat exchange tubes. 3. The heat exchanger tube self-cleaning denitrification heat recovery unit is fixedly connected to the pressure box by the end cap inserted into the top opening of the pressure box and mounting bolts. The end cap can be opened to facilitate the inspection, maintenance or replacement of the elastic metal plate, sliding plate and other components inside the pressure box, ensuring the pressure function of the pressure box is stable and reliable, and avoiding the self-cleaning effect due to component failure. Attached Figure Description

[0013] Figure 1 This is a schematic diagram of the structure of a self-cleaning denitrification heat recovery device for heat exchange tubes proposed in this utility model; Figure 2 This is a partial structural cross-sectional view of a self-cleaning denitrification heat recovery device for heat exchange tubes proposed in this utility model; Figure 3 for Figure 2 Enlarged structural diagram of part A in the middle section; Figure 4 for Figure 1 Three-dimensional view of the heat exchanger tube structure.

[0014] In the diagram: 1. Housing, 2. Controller, 3. Heat exchanger tube, 4. Water storage tank, 5. Water pump, 6. Water supply pipe, 7. Support frame, 8. Booster box, 9. Return pipe, 10. Solenoid valve, 11. Flexible metal plate, 12. Slide plate, 13. Pressure sensor, 14. End cap, 15. Mounting bolts. Detailed Implementation

[0015] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments.

[0016] Reference Figure 1-4 A self-cleaning denitrification heat recovery device for heat exchange tubes includes a housing 1, a controller 2 fixedly connected to the top of the housing 1, heat exchange tubes 3 inside the housing 1, a water storage tank 4 fixedly connected to the top of the housing 1, a water pump 5 fixedly connected to the top of the water storage tank 4, a water supply pipe 6 fixedly connected to the side wall of the water storage tank 4, a support frame 7 fixedly connected to the side wall of the housing 1, a booster box 8 fixedly connected to the top of the support frame 7, a return pipe 9 fixedly connected to the side wall of the booster box 8, a solenoid valve 10 fixedly connected to the wall of the return pipe 9, and the end of the return pipe 9 away from the booster box 8 extending into the interior of the heat exchange tubes 3, which are configured as serpentine tubes.

[0017] An elastic metal plate 11 is fixedly connected to the inner wall of the pressure chamber 8. A sliding plate 12 is fixedly connected to the bottom of the elastic metal plate 11. The sliding plate 12 is slidably disposed on the inner wall of the pressure chamber 8. A pressure sensor 13 is fixedly connected to the bottom of the sliding plate 12.

[0018] Box 1 is the core area for heat recovery and cleaning operations. The heat exchange tubes 3 inside are set as serpentine tubes. The serpentine structure can increase the contact area between the heat exchange tubes and the high-temperature flue gas, thereby improving the heat recovery efficiency. When the high-temperature flue gas generated by the denitrification system enters box 1, the heat of the flue gas is transferred to the heat exchange medium flowing inside the tubes through the tube wall of the heat exchange tubes 3, thus completing the heat recovery. The recovered heat can be used for secondary utilization such as heating and power generation, thereby achieving energy conservation. The controller 2 at the top of box 1 is the control center of the entire device, used to coordinate the heat recovery and self-cleaning processes and ensure the orderly operation of each component.

[0019] The water tank 4 at the top of the housing 1 is used to store clean water. The water pump 5 provides power for water circulation. The water pipe 6 on the side wall of the water tank 4 delivers clean water to the pressure tank 8 at the top of the support frame 7. The ends of the water pipe 6 and the return pipe 9 located inside the pressure tank 8 are both set below the slide plate 12 to ensure that the clean water can stably enter the bottom area of ​​the pressure tank 8. The function of the pressure tank 8 is to pressurize the clean water. The elastic metal plate 11 fixed on its inner wall has elastic deformation capability. The slide plate 12 connected to the bottom can slide along the inner wall of the pressure tank 8. When the clean water continues to enter the bottom of the pressure tank 8, the water pressure inside the tank gradually increases, pushing the slide plate 12 to move upward and compressing the elastic metal plate 11. As the water pressure further increases, the reaction force of the elastic metal plate 11 keeps the clean water at a high pressure, providing conditions for the subsequent high-pressure cleaning heat exchange tube 3.

[0020] The pressure sensor 13 fixed at the bottom of the slide plate 12 is used to monitor the water pressure in the booster box 8. When the pressure reaches the preset threshold, the pressure sensor 13 transmits the signal to the controller 2. The controller 2 controls the solenoid valve 10 on the wall of the return pipe 9 to open. High-pressure cleaning water enters the heat exchange tube 3 through the return pipe 9. The impact force of the high-pressure water flow washes away the accumulated dust and dirt on the inner wall of the heat exchange tube 3, realizing the self-cleaning of the heat exchange tube. After cleaning, the controller 2 closes the solenoid valve 10, the water pump 5 stops supplying water, the elastic metal plate 11 restores its deformation, and drives the slide plate 12 to descend and reset, waiting for the next cleaning operation.

[0021] To facilitate the inspection, maintenance, or replacement of components such as the elastic metal plate 11 and sliding plate 12 inside the booster box 8, such as... Figure 1-4 As shown, the top inner wall of the booster box 8 has an opening, and an end cap 14 is inserted into the inner wall of the opening of the booster box 8. The connection between the end cap 14 and the booster box 8 is also threaded with a mounting bolt 15.

[0022] The water supply pipe 6 and the return pipe 9 are located inside the booster box 8, with one end positioned below the slide plate 12.

[0023] The end cap 14, which is inserted into the top opening of the pressure box 8, is fixedly connected to the pressure box 8 by mounting bolts 15. The end cap 14 can be opened to facilitate the inspection, maintenance or replacement of components such as the elastic metal plate 11 and the sliding plate 12 inside the pressure box 8, ensuring that the pressurization function of the pressure box 8 is stable and reliable, and avoiding the impact of component failure on the self-cleaning effect.

[0024] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the technical scope disclosed in the present utility model, based on the technical solution and the inventive concept of the present utility model, should be included within the protection scope of the present utility model.

Claims

1. A self-cleaning denitrification heat recovery unit with heat exchange tubes, comprising a housing (1), characterized in that: A controller (2) is fixedly connected to the top of the box (1). A heat exchange tube (3) is provided inside the box (1). A water storage tank (4) is fixedly connected to the top of the box (1). A water pump (5) is fixedly connected to the top of the water storage tank (4). A water delivery pipe (6) is fixedly connected to the side wall of the water storage tank (4). A support frame (7) is fixedly connected to the side wall of the box (1). A booster box (8) is fixedly connected to the top of the support frame (7). A return pipe (9) is fixedly connected to the side wall of the booster box (8). A solenoid valve (10) is fixedly connected to the wall of the return pipe (9). The end of the return pipe (9) away from the booster box (8) extends into the interior of the heat exchange tube (3).

2. The denitrification heat recovery device with self-cleaning heat exchange tubes according to claim 1, characterized in that: The heat exchange tube (3) is configured as a serpentine tube.

3. The denitrification heat recovery device with self-cleaning heat exchange tubes according to claim 1, characterized in that: An elastic metal plate (11) is fixedly connected to the inner wall of the booster box (8), and a sliding plate (12) is fixedly connected to the bottom of the elastic metal plate (11). The sliding plate (12) is slidably disposed on the inner wall of the booster box (8).

4. The denitrification heat recovery device with self-cleaning heat exchange tubes according to claim 3, characterized in that: A pressure sensor (13) is fixedly connected to the bottom of the skateboard (12).

5. A self-cleaning denitrification heat recovery device for heat exchange tubes according to claim 1, characterized in that: The pressure box (8) has an opening on the inner wall at the top, and an end cap (14) is inserted into the inner wall of the opening of the pressure box (8).

6. A self-cleaning denitrification heat recovery device for heat exchange tubes according to claim 5, characterized in that: The end cap (14) and the pressure box (8) are connected by a threaded mounting bolt (15).

7. The denitrification heat recovery device with self-cleaning heat exchange tubes according to claim 1, characterized in that: The water supply pipe (6) and return pipe (9) are located inside the booster box (8) with one end positioned below the slide plate (12).

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