Natural gas tail gas waste heat utilization device

Abstract

The utility model discloses a natural gas tail gas waste heat utilization device, specifically at related waste heat utilization technical field, including waste heat heat exchange room, waste heat heat exchange room contains waste heat delivery box and water heat delivery box, the side of waste heat delivery box is installed with water heat delivery box, the top of waste heat delivery box is installed with waste heat heat exchange subassembly, the inside of waste heat heat exchange subassembly is provided with heat pipe cleaning assembly, waste heat delivery box with water heat delivery box is connected with water gas same pipe, can initiative maintain the stability of heat exchange efficiency, through screw rod drive moving sleeve pipe movement, drive cross arrangement's butt joint pole and dust friction pipe along heat exchange water pipe surface movement, its inside soft wear -resisting brush can thoroughly remove the dust that heat exchange water pipe surface adheres, if dust accumulation, will hinder heat transfer, and this cleaning structure can avoid this problem, ensure that heat exchange water pipe keeps good heat exchange state for a long time, avoids the efficiency with use time to drop.

Description

Technical Field

[0001] This utility model relates to the field of waste heat utilization technology, and more specifically, to a natural gas tail gas waste heat utilization device. Background Technology

[0002] A natural gas tail gas waste heat recovery device is a system that recovers the heat energy from the high-temperature tail gas emitted during natural gas combustion or processing, thereby achieving cascaded energy utilization. These devices are widely used in industrial, commercial, and distributed energy sectors, with the core objective of improving energy efficiency, reducing carbon emissions, and generating significant economic benefits.

[0003] During long-term operation, dust carried by natural gas exhaust gas will gradually adhere to the surface of the hot water exchange pipes, forming an insulation layer. On the one hand, this will significantly reduce the heat exchange efficiency between waste heat and cold water, resulting in energy waste; on the other hand, excessive dust accumulation may clog the pipes or cause localized overheating of the equipment, increasing the frequency and cost of malfunction repairs.

[0004] Therefore, a natural gas tail gas waste heat utilization device is proposed to address the above problems. Utility Model Content

[0005] In order to overcome the above-mentioned defects of the prior art, the present invention provides a natural gas tail gas waste heat utilization device to solve the problems mentioned in the background art.

[0006] To achieve the above objectives, this utility model provides the following technical solution: a natural gas tail gas waste heat utilization device, comprising a waste heat exchange chamber, the waste heat exchange chamber including a waste heat conveying box and a water heat conveying box, the water heat conveying box being installed on the side of the waste heat conveying box, a waste heat exchange component being installed above the waste heat conveying box, a heat pipe cleaning component being provided inside the waste heat exchange component, and a water-gas co-transmission pipe connecting the waste heat conveying box and the water heat conveying box.

[0007] Preferably, the heat pipe cleaning assembly includes a screw, a movable sleeve, a connecting rod, and a dust friction tube. The movable sleeve is connected to the outer diameter surface of the screw. Connecting rods are installed on both sides of the movable sleeve. The connecting rods are placed crosswise. A dust friction tube is installed at the end of the connecting rod away from the movable sleeve. A brush is provided inside the dust friction tube.

[0008] Preferably, the waste heat exchange assembly includes a tank, a sealing cap, a connecting pipe, and a clamp. The top of the tank is provided with a sealing cap, and the center of the sealing cap is connected to the connecting pipe. A clamp is connected between the connecting pipe and the water-gas transmission pipe, and a water exchange pipe is placed inside the tank.

[0009] Preferably, a flange ring is provided at the bottom of the tank, and a tee pipe is bolted to the flange ring. A waste heat conveying main pipe is connected to the side of the tee pipe, and a dust collection box is connected to the bottom of the tee pipe.

[0010] Preferably, a screw expander is installed at the bottom of the screw, and two sets of support rods are provided on the side of the waste heat conveying box. A controller is installed on the side of the support rods by bolts.

[0011] Preferably, a diversion chamber is provided above the hydrothermal transport box, and the interior of the diversion chamber is provided with a hot water transport channel and a waste heat transport channel.

[0012] Preferably, a fixing ring is provided between the waste heat conveying box and the tank body, and the waste heat conveying box and the tank body are sealed together by the fixing ring.

[0013] Preferably, the waste heat exchange chamber is provided with a frame, and the bottom of the frame is provided with supporting feet.

[0014] The technical effects and advantages of this utility model are as follows:

[0015] Compared with existing technologies, the heat exchange pipes in the waste heat exchange component of this natural gas tail gas waste heat utilization device are arranged in a spiral pattern. By increasing the flow path and residence time of cold water in the tank, the contact area between the cold water and the waste heat in the tank is expanded, allowing the cold water to absorb the waste heat of the tail gas more fully, directly improving the single heat exchange efficiency and preventing the waste heat from being lost due to insufficient utilization. At the same time, the heat pipe cleaning component can actively maintain the stability of heat exchange efficiency. The moving sleeve is driven by a screw, which moves the cross-arranged docking rods and dust friction tubes along the surface of the heat exchange pipes. The soft and wear-resistant brush inside can thoroughly remove the dust attached to the surface of the heat exchange pipes. If dust accumulates, it will hinder heat transfer. This cleaning structure can avoid this problem, ensuring that the heat exchange pipes maintain a good heat exchange state for a long time and preventing the efficiency from decreasing over time. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the overall structure of this utility model.

[0017] Figure 2 This is a schematic diagram of the tank body of this utility model.

[0018] Figure 3 This is a schematic diagram of the waste heat conveying main pipe of this utility model.

[0019] Figure 4 This is a schematic diagram of the structure of the heat pipe cleaning assembly of this utility model.

[0020] The attached diagram is labeled as follows: 1. Waste heat exchange chamber; 2. Waste heat transfer box; 3. Hydrothermal transfer box; 4. Support leg; 5. Fixing ring; 6. Waste heat exchange assembly; 7. Water and gas transmission pipe; 8. Diversion chamber; 9. Controller; 10. Support rod; 11. Tank body; 12. Sealing cover; 13. Connecting pipe; 14. Hoop ring; 15. Flange ring; 16. T-pipe; 17. Dust collection box; 18. Screw expander; 19. Screw; 20. Moving sleeve; 21. Connecting rod; 22. Dust friction pipe; 23. Hot water pipe; 24. Heat pipe cleaning assembly; 25. Waste heat transfer main pipe; 26. Frame. Detailed Implementation

[0021] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0022] Example

[0023] As attached Figures 1 to 4The device for utilizing waste heat from natural gas exhaust gas includes a waste heat exchange chamber 1, which comprises a waste heat transfer box 2 and a water heat transfer box 3. The waste heat transfer box 2 is mainly used to receive the natural gas exhaust gas transported from outside, serving as the initial storage and transfer space for waste heat. It also provides installation support for the waste heat exchange assembly 6 installed above. Two sets of support rods 10 are fixed to its side, and the support rods 10 are securely connected to a controller 9 by bolts. The controller 9 can control parameters such as the start / stop of various components and the medium transport speed, ensuring the orderly operation of the entire system. The water heat transfer box 3 is installed on the side of the waste heat transfer box 2. The water heat transfer box 3 is responsible for storing and transporting cold water to be heated. It has a cold water transport channel inside, which can accurately transport cold water to the hot water pipe 23 inside the waste heat exchange assembly 6, providing a water source for subsequent heat exchange processes. A diversion chamber 8 is also provided above the water heat transfer box 3. The diversion chamber 8 is internally separated by a partition... The plate separates the hot water delivery channel and the waste heat delivery channel for the diversion of the hot water and exhaust gas after heat exchange. A waste heat exchange component 6 is installed above the waste heat delivery box 2. The waste heat exchange component 6 is equipped with a heat pipe cleaning component 24. A water-gas co-transmission pipe 7 connects the waste heat delivery box 2 and the water-heat delivery box 3. The water-gas co-transmission pipe 7 is the key channel for the co-transmission of hot water and waste heat gas after heat exchange. Its inner wall is equipped with an anti-corrosion structure to avoid rust caused by long-term contact with hot water and exhaust gas and extend its service life. When the cold water in the hot water pipe 23 is heated, the hot water and the waste heat gas in the tank 11 can enter the water-gas co-transmission pipe 7 at the same time and be transported to the diversion chamber 8 along the pipeline. The diversion chamber 8 guides the hot water and waste heat gas to the designated processing direction through the internal hot water delivery channel and waste heat delivery channel. Some of the hot water will be further diverted to the screw expander 18 to provide a high-pressure medium for the screw expander 18.

[0024] In a preferred embodiment, the heat pipe cleaning assembly 24 includes a screw 19, a movable sleeve 20, connecting rods 21, and a dust friction tube 22. The movable sleeve 20 is connected to the outer diameter surface of the screw 19, and the outer diameter surface of the screw 19 is threaded to match the threads on the inner wall of the movable sleeve 20, forming a threaded connection structure. Connecting rods 21 are symmetrically installed on both sides of the movable sleeve 20. The connecting rods 21 are placed in a cross pattern to enhance structural stability and prevent shaking during movement. A connecting rod 21 is installed, and the connecting rods 21 are placed crosswise. A dust friction tube 22 is installed at the end of the connecting rod 21 away from the moving sleeve 20. The inner diameter of the dust friction tube 22 matches the outer diameter of the hot water exchange pipe 23, so that it can fit tightly against the surface of the hot water exchange pipe 23. The dust friction tube 22 is equipped with a soft and wear-resistant brush inside. When the dust friction tube 22 moves along the hot water exchange pipe 23, the brush can completely remove the dust attached to the surface of the hot water exchange pipe 23 through friction. The dust friction tube 22 is equipped with a brush inside.

[0025] In a preferred embodiment, the waste heat exchange assembly 6 includes a tank 11, a sealing cap 12, a connecting pipe 13, and a clamp 14. The sealing cap 12 is provided at the top of the tank 11 and fits tightly against the edge of the tank 11, which can effectively prevent the leakage of waste heat and water vapor inside the tank 11 and ensure heat exchange efficiency. The connecting pipe 13 is connected to the center of the sealing cap 12, and the clamp 14 is connected between the connecting pipe 13 and the water-gas co-transport pipe 7 to ensure the sealing and stability of the connection, so that the hot water and waste heat gas after heat exchange can smoothly enter the water-gas co-transport pipe 7. A hot water exchange pipe 23 is placed inside the tank 11. The hot water exchange pipe 23 adopts a spiral structure arrangement, which can greatly increase the flow path and residence time of cold water in the tank 11, while expanding the contact area with the waste heat inside the tank 11 and improving the heat exchange effect.

[0026] In a preferred embodiment, a flange ring 15 is provided at the bottom of the tank body 11. The flange ring 15 is detachably connected to the tee pipe 16 by bolts, which facilitates the inspection and replacement of subsequent components. The flange ring 15 is connected to the tee pipe 16 by bolts. The side of the tee pipe 16 is connected to a waste heat transmission main pipe 25. The waste heat transmission main pipe 25 can continuously transmit the waste heat of the external natural gas tail gas to the inside of the tank body 11 to provide a heat source for heat exchange. The bottom of the tee pipe 16 is connected to a dust collection box 17. The dust collection box 17 is used to collect the dust cleaned by the heat pipe cleaning component 24 to prevent dust accumulation from affecting the operation of the device.

[0027] In a preferred embodiment, a screw expander 18 is installed at the bottom of the screw 19, and two sets of support rods 10 are provided on the side of the waste heat conveying box 2. A controller 9 is installed on the side of the support rods 10 by bolts.

[0028] In a preferred embodiment, a diversion chamber 8 is provided above the water heat transfer box 3, and the interior of the diversion chamber 8 is provided with a hot water transfer channel and a waste heat transfer channel.

[0029] In a preferred embodiment, a fixing ring 5 is provided between the waste heat transfer box 2 and the tank 11. The fixing ring 5 fits onto the connection between the two to further enhance the sealing effect, prevent waste heat from being lost from the gaps, and ensure the overall sealing of the heat exchange assembly. The waste heat transfer box 2 and the tank 11 are sealed together by the fixing ring 5.

[0030] In a preferred embodiment, a frame 26 is provided inside the waste heat exchange chamber 1, and a support leg 4 is provided at the bottom of the frame 26.

[0031] In this embodiment, the screw expander 18 and the three-way pipe 16 are commercially available devices known to those skilled in the art. They can be customized or selected according to actual needs. Here, we are only using them without making any structural or functional improvements, so we will not go into detail here.

[0032] The working process of this utility model is as follows: During operation, when waste heat is being treated, cold water is introduced into the heat exchange pipe 23. The cold water flows along the spiral path of the heat exchange pipe 23. At this time, the waste heat conveying main pipe 25 conveys the waste heat into the tank 11 of the waste heat exchange component 6, heating the water source in the heat exchange pipe 23. Then, the heated water source moves in the water-gas conveying pipe 7 along with the waste heat gas in the heat exchange pipe 23, thereby completing the continuous heating of the water source in the heat exchange pipe 23. At this time, the waste heat and the heated hot water are separated in the diversion chamber 8 and respectively conveyed to the designated processing direction. Part of the heated hot water is diverted in the diversion box and enters the screw expander 18. At this time, the heated hot water uses the waste heat to generate high-pressure steam or hot liquid, and the high-pressure medium pushes... The rotor, meshing with the drive rod, rotates, continuously increasing in volume. The expanding medium performs work, converting heat energy into the rotational mechanical energy of the screw 19. The drive end of the screw expander 18 is connected to a gearbox that enables the screw 19 to rotate forward and backward. The gearbox achieves forward and reverse rotation through a clutch and gears. The transmission structure of the gearbox is a common transmission structure on the market, so we will not go into detail here. Then, as the screw 19 is driven to rotate, it drives the dust friction tube 22, which is fixed by the docking rod 21 on the moving sleeve 20, to move along the spiral path of the hot water exchange pipe 23, and cleans the dust that adheres to the hot water exchange pipe 23 due to contact with the waste heat. This ensures that the contact surface of the hot water exchange pipe 23 does not suffer from poor heat exchange efficiency due to dust accumulation. The above is the working principle of this natural gas tail gas waste heat utilization device.

Claims

1. A natural gas tail gas waste heat utilization device, comprising a waste heat exchange chamber (1), characterized in that: The waste heat exchange chamber (1) includes a waste heat delivery box (2) and a water heat delivery box (3). The water heat delivery box (3) is installed on the side of the waste heat delivery box (2). A waste heat exchange assembly (6) is installed above the waste heat delivery box (2). A heat pipe cleaning assembly (24) is installed inside the waste heat exchange assembly (6). A water-gas co-transmission pipe (7) connects the waste heat delivery box (2) and the water heat delivery box (3).

2. The natural gas tail gas waste heat utilization device according to claim 1, characterized in that: The heat pipe cleaning assembly (24) includes a screw (19), a movable sleeve (20), a connecting rod (21), and a dust friction tube (22). The movable sleeve (20) is connected to the outer diameter surface of the screw (19). The connecting rods (21) are installed on both sides of the movable sleeve (20). The connecting rods (21) are placed crosswise. The dust friction tube (22) is installed at the end of the connecting rod (21) away from the movable sleeve (20). A brush is provided inside the dust friction tube (22).

3. The natural gas tail gas waste heat utilization device according to claim 1, characterized in that: The waste heat exchange assembly (6) includes a tank (11), a sealing cap (12), a connecting pipe (13), and a hoop (14). The top of the tank (11) is provided with a sealing cap (12), and the center of the sealing cap (12) is connected to the connecting pipe (13). The connecting pipe (13) and the water-gas transmission pipe (7) are connected by a hoop (14). The tank (11) contains a heat exchange pipe (23).

4. A natural gas tail gas waste heat utilization device according to claim 3, characterized in that: The bottom of the tank (11) is provided with a flange ring (15), and the flange ring (15) is connected to a three-way pipe (16) by bolts. The side of the three-way pipe (16) is connected to a waste heat conveying main pipe (25), and the bottom of the three-way pipe (16) is connected to a dust collection box (17).

5. A natural gas tail gas waste heat utilization device according to claim 2, characterized in that: The bottom of the screw (19) is equipped with a screw expander (18), and the side of the waste heat conveying box (2) is provided with two sets of support rods (10). The side of the support rods (10) is equipped with a controller (9) by bolts.

6. A natural gas tail gas waste heat utilization device according to claim 1, characterized in that: A diversion chamber (8) is provided above the water heat transfer box (3), and a hot water transfer channel and a waste heat transfer channel are provided inside the diversion chamber (8).

7. A natural gas tail gas waste heat utilization device according to claim 3, characterized in that: A fixing ring (5) is provided between the waste heat conveying box (2) and the tank (11), and the waste heat conveying box (2) and the tank (11) are sealed together by the fixing ring (5).

8. A natural gas tail gas waste heat utilization device according to claim 1, characterized in that: The waste heat exchange chamber (1) is equipped with a frame (26), and the bottom of the frame (26) is equipped with a support foot (4).

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