A biomass gasification furnace water supply cooling waste heat utilization device

Abstract

This utility model discloses a waste heat utilization device for water replenishment and cooling in a biomass gasification furnace, comprising a furnace body with a cavity inside. Multiple fixing blocks are fixedly connected to the right side of the furnace body. A plate heat exchanger is fixedly connected to the right side of the two upper fixing blocks, and a cooling water tank is fixedly connected to the right side of the two lower fixing blocks. A softened water tank is located on the right side of the cooling water tank. A first pump body is installed at the upper end of the cooling water tank, and a second pump body is installed at the upper end of the softened water tank. The inlet of the first pump body communicates with the bottom space of the cooling water tank, and the outlet of the first pump body is connected to the first inlet of the plate heat exchanger via a vertical pipe. This device effectively enhances the cooling effect, isolates water quality, and improves steam quality through the cooling water tank, softened water tank, and plate heat exchanger. Furthermore, the vertical rods and arc-shaped protrusions enhance the cooling effect on the inner wall of the gasification furnace.

Description

Technical Field

[0001] This utility model relates to the field of waste heat utilization technology, and in particular to a waste heat utilization device for water cooling of a biomass gasifier. Background Technology

[0002] During biomass gasification, the gasifier generates a large amount of heat. If it is not effectively cooled in time, the internal temperature will become too high, leading to a series of problems. On the one hand, excessively high temperatures will cause impurities such as tar to coke on the inner wall of the gasifier, which will not only affect the normal operation of the gasifier and reduce gasification efficiency, but may also cause tar to burn inside the gasifier, disrupting the stability of the gasification process and even damaging the equipment. On the other hand, prolonged exposure to high temperatures will shorten the service life of the gasifier equipment, increase the frequency of failures due to overheating, and raise maintenance costs.

[0003] In existing biomass gasification furnace cooling systems, some suffer from poor cooling performance, failing to effectively reduce the furnace temperature. Furthermore, some cooling systems are not strictly separated from the boiler inlet water, allowing impurities in the cooling water to easily enter the boiler system, affecting steam quality and reducing the overall safety and reliability of the process.

[0004] Furthermore, in terms of energy utilization, if the waste heat generated by biomass gasification furnaces is not utilized rationally, it will lead to energy waste and increase operating costs. Existing waste heat utilization methods are inefficient and cannot fully recover and utilize the waste heat from the gasification furnaces to increase the boiler inlet water temperature, thus failing to effectively save fuel consumption and improve energy utilization efficiency and economic benefits.

[0005] Therefore, it is necessary to design a biomass gasification furnace water replenishment and cooling waste heat utilization device to solve the above problems. Utility Model Content

[0006] The purpose of this utility model is to address the shortcomings of existing technologies by proposing a biomass gasification furnace water replenishment and cooling waste heat utilization device. This device can effectively enhance the cooling effect, isolate water quality, and improve steam quality through a cooling water tank, a softening water tank, and a plate heat exchanger. At the same time, the vertical rods and arc-shaped protrusions enhance the cooling effect on the inner wall of the gasification furnace.

[0007] To achieve the above objectives, the present invention adopts the following technical solution:

[0008] A biomass gasification furnace water replenishment and cooling waste heat utilization device includes a furnace body with a cavity inside. Multiple fixing blocks are fixedly connected to the right side of the furnace body. A plate heat exchanger is fixedly connected to the right side of the two upper fixing blocks, and a cooling water tank is fixedly connected to the right side of the two lower fixing blocks. A softened water tank is located on the right side of the cooling water tank. A first pump body is installed at the upper end of the cooling water tank, and a second pump body is installed at the upper end of the softened water tank. The inlet of the first pump body is connected to the bottom space of the cooling water tank, and the outlet of the first pump body is connected to the first inlet of the plate heat exchanger via a vertical pipe. The first outlet of the plate heat exchanger is connected to the top space of the cavity via a first outlet pipe, and the left side space of the cooling water tank is connected to the bottom space of the cavity via a first inlet pipe.

[0009] Preferably, the inlet end of the second pump body is connected to the bottom space of the softened water tank, the outlet end of the second pump body is connected to the second inlet end of the plate heat exchanger through a second inlet pipe, and the second outlet end of the plate heat exchanger is connected to the top space of the softened water tank through a second outlet pipe.

[0010] Preferably, the right side of the softened water tank is connected to a connecting pipe, the connecting pipe is equipped with a valve, and a connecting sleeve is threaded onto the connecting pipe.

[0011] Preferably, the connecting sleeve has a T-shaped cross-section, and a sealing ring is fixedly connected to the inner left side wall of the connecting sleeve.

[0012] Preferably, the inner wall of the cavity is fixedly connected with a plurality of arc-shaped protrusions.

[0013] Preferably, the upper end of the furnace body is provided with an opening, a rotating ring is provided inside the opening, an annular groove is provided on the inner wall of the opening, an annular block is provided in the annular groove, the annular block is fixedly connected to the outer wall of the rotating ring, multiple vertical rods are fixedly connected to the lower end of the rotating ring, an installation block is fixedly connected to the left side of the furnace body, a drive motor is installed at the lower end of the installation block, the output shaft end of the drive motor passes through the installation block and is fixedly connected to a gear, and multiple toothed ridges are fixedly connected to the outer wall of the rotating ring.

[0014] Compared with existing technologies, the advantages of this device are:

[0015] 1. Compared with existing technologies, this device has multiple arc-shaped protrusions fixedly connected to the inner wall of the cavity inside the furnace, and a rotating ring and multiple rotatable vertical rods are provided inside the cavity. The arc-shaped protrusions can increase the contact area between the water flow and the inner wall of the furnace. The vertical rods, driven by the motor, make circular motion, which can effectively disturb the water flow, break the laminar flow state of the water flow, and significantly enhance the turbulence of the water. According to the principle of heat transfer, this greatly improves the heat exchange efficiency between the water and the inner wall of the gasifier, more efficiently removes the heat generated during the gasification process, effectively reduces the temperature inside the furnace, reduces the coking of impurities such as tar, ensures the stability of the gasification process, and also extends the service life of the equipment, reducing failures and maintenance costs caused by overheating.

[0016] 2. Compared with existing technologies, this device strictly separates the cooling system from the boiler feedwater system. The cooling water tank, the first pump body, the plate heat exchanger, and the cavity inside the furnace constitute an independent cooling circulation system, while the softened water tank, the second pump body, and the plate heat exchanger form another circulation system. Heat exchange is achieved through the plate heat exchanger, preventing impurities in the cooling water from entering the boiler system, ensuring the purity of the boiler feedwater, thereby guaranteeing the purity of the steam quality and improving the overall safety and reliability of the process.

[0017] 3. Compared with the prior art, the connecting sleeve on the connecting pipe in this device has a T-shaped cross-section and a sealing ring is fixedly connected to the inner wall on the left side, which makes it easy to connect the softened water tank to the water inlet of the boiler using a pipe. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the structure of a biomass gasification furnace water cooling waste heat utilization device proposed in this utility model.

[0019] Figure 2 for Figure 1 A structural diagram from another perspective;

[0020] Figure 3 This is a half-section view of the furnace body;

[0021] Figure 4 This is a schematic diagram of the rotating ring.

[0022] In the diagram: 1 Furnace body, 2 Slag outlet, 3 Feed inlet, 4 Rotating ring, 5 Fixed block, 6 Plate heat exchanger, 7 Cooling water tank, 8 First pump body, 9 Second pump body, 10 First water outlet pipe, 11 Second water outlet pipe, 12 Softened water tank, 13 Connecting pipe, 14 Connecting sleeve, 15 Sealing ring, 16 First water inlet pipe, 17 Vertical pipe, 18 Drive motor, 19 Gear, 20 Mounting block, 21 Arc-shaped protrusion, 22 Vertical rod, 23 Ring block. Detailed Implementation

[0023] 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.

[0024] Reference Figures 1-4 A biomass gasification furnace makeup water cooling waste heat utilization device includes a furnace body 1 with a cavity inside. Multiple fixing blocks 5 are fixedly connected to the right side of the furnace body 1. A plate heat exchanger 6 is fixedly connected to the right side of the two upper fixing blocks 5. A cooling water tank 7 is fixedly connected to the right side of the two lower fixing blocks 5. A softened water tank 12 is located on the right side of the cooling water tank 7. A first pump body 8 is installed at the upper end of the cooling water tank 7, and a second pump body 9 is installed at the upper end of the softened water tank 12. The water inlet of the first pump body 8 communicates with the bottom space of the cooling water tank 7. The outlet of the first pump body 8 is connected to the first inlet of the plate heat exchanger 6 through a vertical pipe 17. The first outlet of the plate heat exchanger 6 is connected to the top space of the cavity through a first outlet pipe 10. The left side space of the cooling water tank 7 is connected to the bottom space of the cavity through a first inlet pipe 16. The inlet of the second pump body 9 is connected to the bottom space of the softened water tank 12. The outlet of the second pump body 9 is connected to the second inlet of the plate heat exchanger 6 through a second inlet pipe. The second outlet of the plate heat exchanger 6 is connected to the top space of the softened water tank 12 through a second outlet pipe 11.

[0025] The softened water tank 12 is connected to a connecting pipe 13 on its right side. A valve is installed on the connecting pipe 13, and a connecting sleeve 14 is threaded onto the connecting pipe 13. The connecting sleeve 14 has a T-shaped cross-section, and a sealing ring 15 is fixedly connected to the inner wall of the left side of the connecting sleeve 14. A pipe is installed at the water inlet of the boiler, and a threaded joint is installed at one end of the pipe. The inner wall of the connecting sleeve 14 is threaded, so that when the softened water is sent to the boiler, the connecting sleeve 14 can be threadedly connected to the joint of the pipe. At the same time, the sealing ring 15 can ensure the sealing after the connection.

[0026] The cavity has multiple arc-shaped protrusions 21 fixedly connected to its inner wall. The arc-shaped protrusions 21 increase the contact area between the water flow and the inner wall of the furnace body 1, thereby improving the cooling effect on the inner wall of the furnace body 1. The arc-shaped protrusions 21 are all made of heat-conducting material. The upper end of the furnace body 1 has an opening with a rotating ring 4 inside. The inner wall of the opening has an annular groove with an annular block 23 inside. The annular block 23 is fixedly connected to the outer wall of the rotating ring 4. The lower end of the rotating ring 4 is fixedly connected to multiple vertical rods 22. The left side of the furnace body 1 is fixedly connected to an installation block 20. The lower end of the installation block 20 is equipped with a drive motor 18. The output shaft of the drive motor 18 passes through the installation block 20 and is fixedly connected to a gear 19. The outer wall of the rotating ring 4 is fixedly connected to multiple toothed edges. The rotation of the multiple vertical rods 22 disturbs the water flow in the cavity, greatly increasing the contact area and turbulence between the water flow and the inner wall of the furnace body 1, thereby improving the heat exchange efficiency.

[0027] The functional principle of this utility model can be explained through the following operation: When biomass undergoes a gasification reaction inside the furnace body 1, a large amount of heat is generated. At this time, the first pump body 8 is started, and the first pump body 8 draws out the cooling water from the bottom of the cooling water tank 7. The cooling water enters the first inlet end of the plate heat exchanger 6 through the vertical pipe 17, flows out from the first outlet end of the plate heat exchanger 6, and enters the top of the cavity inside the furnace body 1 through the first outlet pipe 10.

[0028] The cooling water entering the cavity flows downwards under gravity. During this process, the multiple arc-shaped protrusions 21 fixedly connected to the inner wall of the cavity and the vertical rod 22 driven by the rotating ring 4 perform circular motion (the drive motor 18 drives the gear 19 to rotate, and the gear 19 meshes with the teeth on the outer wall of the rotating ring 4, thereby causing the rotating ring 4 to rotate), which disturbs the water flow. This greatly increases the contact area and turbulence between the water flow and the inner wall of the furnace body 1, improves the heat exchange efficiency, and effectively removes heat from the inner wall of the furnace body 1, thus cooling the gasifier. The cooled water flows back to the cooling water tank 7 from the bottom of the cavity through the first water inlet pipe 16, completing one cooling cycle.

[0029] The second pump 9 is started, drawing softened water from the bottom of the softened water tank 12 and sending it through the second inlet pipe to the second inlet end of the plate heat exchanger 6. In the plate heat exchanger 6, the softened water exchanges heat with the cooling water from the cooling water tank 7, absorbing heat and increasing in temperature. It then flows out from the second outlet end of the plate heat exchanger 6 and returns to the top of the softened water tank 12 through the second outlet pipe 11. At this time, the water temperature in the softened water tank 12 increases, achieving the recovery and utilization of waste heat from the cooling cycle.

[0030] When heated softened water needs to be sent to the boiler, align the boiler inlet pipe with the right side of the connecting sleeve 14. By rotating the connecting sleeve 14, the connecting sleeve 14 is threadedly connected to the pipe joint. Open the valve on the connecting pipe 13. Since the connecting sleeve 14 and the connecting pipe 13 are threadedly connected, and the sealing ring 15 on the left inner wall of the connecting sleeve 14 and the threaded connection between the connecting sleeve 14 and the pipe joint ensure good sealing, the heated softened water can be transported to the boiler through the connecting pipe 13, connecting sleeve 14 and other components. It is heated into saturated steam as boiler feed water. Because the temperature of the softened water has increased, the fuel required for boiler heating can be effectively saved, the boiler efficiency is improved, the overall operating cost is reduced, and the efficient use of energy is achieved.

[0031] 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 biomass gasification furnace water replenishment and cooling waste heat utilization device, comprising a furnace body (1), characterized in that: The furnace body (1) has a cavity inside. Multiple fixing blocks (5) are fixedly connected to the right side of the furnace body (1). Plate heat exchangers (6) are fixedly connected to the right side of the two upper fixing blocks (5). Cooling water tanks (7) are fixedly connected to the right side of the two lower fixing blocks (5). Softening water tanks (12) are provided on the right side of the cooling water tanks (7). A first pump body (8) is installed at the upper end of the cooling water tanks (7). A second pump body (9) is installed at the upper end of the softening water tanks (12). The water inlet of the first pump body (8) is connected to the bottom space of the cooling water tanks (7). The water outlet of the first pump body (8) is connected to the first water inlet of the plate heat exchanger (6) through a vertical pipe (17). The first water outlet of the plate heat exchanger (6) is connected to the top space of the cavity through a first water outlet pipe (10). The left side space of the cooling water tanks (7) is connected to the bottom space of the cavity through a first water inlet pipe (16).

2. The biomass gasification furnace water replenishment and cooling waste heat utilization device according to claim 1, characterized in that: The inlet end of the second pump body (9) is connected to the bottom space of the softened water tank (12), the outlet end of the second pump body (9) is connected to the second inlet end of the plate heat exchanger (6) through the second inlet pipe, and the second outlet end of the plate heat exchanger (6) is connected to the top space of the softened water tank (12) through the second outlet pipe (11).

3. The biomass gasification furnace water replenishment and cooling waste heat utilization device according to claim 1, characterized in that: The right side of the softened water tank (12) is connected to a connecting pipe (13), a valve is provided on the connecting pipe (13), and a connecting sleeve (14) is threaded onto the connecting pipe (13).

4. The biomass gasification furnace water replenishment and cooling waste heat utilization device according to claim 3, characterized in that: The connecting sleeve (14) has a T-shaped cross-section, and a sealing ring (15) is fixedly connected to the left inner wall of the connecting sleeve (14).

5. The biomass gasification furnace water replenishment and cooling waste heat utilization device according to claim 1, characterized in that: The inner wall of the cavity is fixedly connected with multiple arc-shaped protrusions (21).

6. The biomass gasification furnace water replenishment and cooling waste heat utilization device according to claim 1, characterized in that: The upper end of the furnace body (1) is provided with an opening, and a rotating ring (4) is provided inside the opening. The inner wall of the opening is provided with an annular groove, and an annular block (23) is provided inside the annular groove. The annular block (23) is fixedly connected to the outer wall of the rotating ring (4). Multiple vertical rods (22) are fixedly connected to the lower end of the rotating ring (4). An installation block (20) is fixedly connected to the left side of the furnace body (1). A drive motor (18) is installed at the lower end of the installation block (20). The output shaft of the drive motor (18) passes through the installation block (20) and is fixedly connected to a gear (19). Multiple toothed ridges are fixedly connected to the outer wall of the rotating ring (4).

Images