Exhaust gas heat exchange cooling system

Abstract

The present invention discloses an exhaust gas heat exchange cooling system, which belongs to the technical field of exhaust gas purification. The exhaust gas heat exchange cooling system includes a box body, a special-shaped connector, a high-temperature resistant exhaust pipe, several groups of gas-liquid cooling devices, several maintenance air joints and an automatic cleaning device; the gas-liquid cooling device sequentially passes through the box body and the high-temperature resistant exhaust pipe in the vertical direction; several groups of the gas-liquid cooling devices are sequentially arranged at the same interval in the vertical direction; the high-temperature resistant exhaust pipe and the contact part of the gas-liquid cooling device with the high-temperature resistant exhaust pipe are welded by corrugated metal plates, and the gas-liquid cooling device cools the outside of the high-temperature resistant exhaust pipe by heat transfer to ensure that the gas-liquid cooling device will not scale; the automatic cleaning device is fixedly connected to the inside of the high-temperature resistant exhaust pipe, and by spraying a cleaning agent, the dust particles adhering to the high-temperature resistant exhaust pipe are cleaned to improve the heat dissipation effect of the high-temperature resistant exhaust pipe.

Description

Technical Field

[0001] The invention relates to the technical field of waste gas purification, and in particular to a waste gas heat exchange cooling system. Background Art

[0002] Conventional exhaust gas cooling devices are cooling forms composed of heat exchangers, cooling water circulation systems and cooling towers. During the cooling water circulation process, the circulating pump operates continuously, and the heat absorbed by the heat exchanger is transported to the top of the cooling tower for spraying through water as a carrier, and the circulating water is cooled by the cooling fan.

[0003] On the one hand, the conventional exhaust gas cooling device uses a finned tube heat exchanger, which has low heat exchange efficiency and the finned tubes are prone to scaling during the cooling process, making it inconvenient to disassemble and clean manually or automatically; on the other hand, the circulating pump runs continuously during the cooling process to transfer heat from the heat exchanger to the cooling tower, so the continuous operation of the cooling pump consumes a lot of electricity. Summary of the invention

[0004] The purpose of the present invention is to provide an exhaust gas heat exchange cooling system to solve the problems of low heat exchange efficiency and easy scaling of the fin tubes during the cooling process in the fin tube heat exchanger of the conventional exhaust gas cooling device, inconvenience of manual disassembly and cleaning and automatic cleaning, and large amount of electric energy consumed by continuous operation of the cooling pump.

[0005] In order to solve the above technical problems, the present invention provides an exhaust gas heat exchange cooling system, including a box body, a special-shaped connector, a high-temperature resistant exhaust gas pipe, a plurality of gas-liquid cooling devices, a plurality of maintenance air joints and an automatic cleaning device;

[0006] The special-shaped connector is fixedly connected to the top of the box body and communicates with the high-temperature resistant exhaust pipe inside the box body;

[0007] The gas-liquid cooling device passes through the box and the high-temperature resistant exhaust pipe in sequence along the vertical direction; a plurality of groups of the gas-liquid cooling devices are arranged in sequence at the same intervals along the vertical direction;

[0008] The automatic cleaning device is fixedly connected to the inside of the high temperature resistant exhaust gas pipe, and cleans the dust particles adhering to the inner wall of the high temperature resistant exhaust gas pipe by spraying a cleaning agent, thereby improving the heat dissipation effect of the high temperature resistant exhaust gas pipe;

[0009] The maintenance air joint is fixedly connected between the gas-liquid cooling devices and is used for maintenance of the gas-liquid cooling devices.

[0010] Optionally, the gas-liquid cooling device is composed of an air inlet pipe, an exhaust pipe, a liquid cooling mechanism and a drainage mechanism; the air inlet pipe and the exhaust pipe are respectively located at two ends of the gas-liquid cooling device, and the heat of the contact surface between the gas-liquid cooling device and the high-temperature resistant exhaust pipe is taken away by the flowing air; the liquid cooling mechanism is located inside the gas-liquid cooling device, and the contact surface between the gas-liquid cooling device and the high-temperature resistant exhaust pipe is cooled and lowered by spraying circulating cooling water.

[0011] Optionally, the liquid cooling mechanism includes a cooling water pipe and several cooling spray mechanisms, and the cooling spray mechanisms are all connected to the cooling water pipe, and cooling water is provided to the cooling spray mechanisms through an external circulating water pump; the cooling spray mechanisms are all fixedly connected to the upper part of the gas-liquid cooling device, and the contact surface between the gas-liquid cooling device and the high-temperature resistant exhaust gas pipe is cooled from top to bottom.

[0012] Optionally, the drainage mechanism includes a drainage pipe and a plurality of connecting elbows; one end of the connecting elbow is fixedly connected to the lower end of the air inlet pipe, and is used to collect cooling water flowing out of the gas-liquid cooling device; the other end is connected to the drainage pipe, and the collected cooling water is uniformly transmitted to the cooling water tank by the drainage pipe.

[0013] Optionally, a cooling fan is installed on the exhaust duct to increase the flow rate of air in the gas-liquid cooling device and improve the cooling effect.

[0014] Optionally, the automatic cleaning device consists of a cleaning water pipe, several groups of cleaning spray mechanisms and a cleaning water tank; the cleaning water tank is fixedly connected to the bottom of the high temperature resistant exhaust gas pipe and is communicated with the cleaning water pipe; the cleaning spray mechanism is fixedly connected to the inner wall of the high temperature resistant exhaust gas pipe, and both are communicated with the cleaning water tank.

[0015] Optionally, an air inlet is opened on the side wall of the special-shaped connector, and an air outlet is opened at the end of the high-temperature resistant exhaust gas pipe. High-temperature exhaust gas is introduced from the air inlet, cooled by the high-temperature resistant exhaust gas pipe, and then discharged from the air outlet.

[0016] Optionally, the high temperature resistant exhaust pipe and the contact portion of the gas-liquid cooling device with the high temperature resistant exhaust pipe are both formed by welding corrugated metal plates.

[0017] Optionally, an explosion-proof membrane is installed at the bottom end of the special-shaped connector.

[0018] Optionally, the box body is provided with a plurality of inspection holes.

[0019] The present invention provides an exhaust gas heat exchange cooling system, comprising a box body, a special-shaped connector, a high-temperature resistant exhaust gas pipe, several groups of gas-liquid cooling devices, several maintenance air sections and an automatic cleaning device; the special-shaped connector is fixedly connected to the top of the box body and is connected to the high-temperature resistant exhaust gas pipe inside the box body; the gas-liquid cooling device passes through the box body and the high-temperature resistant exhaust gas pipe in sequence along the vertical direction; several groups of the gas-liquid cooling devices are arranged in sequence at the same intervals along the vertical direction; the high-temperature resistant exhaust gas pipe and the contact parts of the gas-liquid cooling device and the high-temperature resistant exhaust gas pipe are welded with corrugated metal plates, and the gas-liquid cooling device cools the outside of the high-temperature resistant exhaust gas pipe by heat transfer to ensure that the gas-liquid cooling device will not scale; the automatic cleaning device is fixedly connected to the inside of the high-temperature resistant exhaust gas pipe, and by spraying a cleaning agent, dust particles adhering to the high-temperature resistant exhaust gas pipe are cleaned to improve the heat dissipation effect of the high-temperature resistant exhaust gas pipe. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a schematic diagram of the overall structure of an exhaust gas heat exchange cooling system provided by the present invention;

[0021] Figure 2 It is a structural schematic diagram of a gas-liquid cooling device of an exhaust gas heat exchange cooling system provided by the present invention;

[0022] Figure 3 It is a structural schematic diagram of an automatic cleaning device for an exhaust gas heat exchange cooling system provided by the present invention;

[0023] Figure 4 It is a flow diagram of high-temperature exhaust gas and cooling air in an exhaust gas heat exchange cooling system provided by the present invention. DETAILED DESCRIPTION

[0024] The exhaust gas heat exchange cooling system proposed by the present invention is further described in detail below in conjunction with the accompanying drawings and specific embodiments. The advantages and features of the present invention will become clearer according to the following description and claims. It should be noted that the drawings are all in a very simplified form and are not in precise proportions, and are only used to conveniently and clearly assist in explaining the purpose of the embodiments of the present invention.

[0025] The present invention provides an exhaust gas heat exchange cooling system, such as Figure 1As shown, it includes a box body 1, a special-shaped connector 2, a high-temperature resistant exhaust pipe 3, several groups of gas-liquid cooling devices 4, several maintenance air joints 5 and an automatic cleaning device 6; the special-shaped connector 2 is fixedly connected to the top of the box body 1, and is connected to the high-temperature resistant exhaust pipe 3 inside the box body 1; the gas-liquid cooling device 4 passes through the box body 1 and the high-temperature resistant exhaust pipe 3 in sequence along the vertical direction; several groups of the gas-liquid cooling devices 4 are arranged in sequence at the same intervals along the vertical direction; the automatic cleaning device 6 is fixedly connected to the inside of the high-temperature resistant exhaust pipe 3, and by spraying a cleaning agent, the dust particles adhered to the high-temperature resistant exhaust pipe 3 are cleaned, thereby improving the heat dissipation effect of the high-temperature resistant exhaust pipe 3; the maintenance air joint 5 is fixedly connected between the gas-liquid cooling devices 4, and is used to repair the gas-liquid cooling devices 4.

[0026] Specifically, Figure 2 As shown, the gas-liquid cooling device 4 is composed of an air inlet pipe 41, an exhaust pipe 42, a liquid cooling mechanism and a drainage mechanism; the air inlet pipe 41 and the exhaust pipe 42 are respectively located at both ends of the gas-liquid cooling device 4, and the heat of the contact surface between the gas-liquid cooling device 4 and the high-temperature resistant exhaust pipe 3 is taken away by the flowing air, and a cooling fan 47 is installed on the exhaust pipe 42 to increase the flow rate of the air in the gas-liquid cooling device 4 and improve the cooling effect; the liquid cooling mechanism is located inside the gas-liquid cooling device 4, and the contact surface between the gas-liquid cooling device 4 and the high-temperature resistant exhaust pipe 3 is cooled by spraying circulating cooling water; the liquid cooling mechanism includes a cooling water pipe 43 and a plurality of cooling spray mechanisms 44, and the cooling spray mechanisms 44 are all connected to the cooling water pipe 43, and are cooled by an external circulating water pump. The cooling spray mechanism 44 provides cooling water; the cooling spray mechanism 44 is fixedly connected to the upper part of the inside of the gas-liquid cooling device 4, and cools the contact surface between the gas-liquid cooling device 4 and the high-temperature resistant exhaust pipe 3 from top to bottom. The gas-liquid cooling device 4 is cooled by heat transfer outside the high-temperature resistant exhaust pipe 3 to ensure that the gas-liquid cooling device will not scale, thereby reducing the number of maintenance and greatly reducing production costs; the drainage mechanism includes a drainage pipe 45 and a plurality of connecting elbows 46; one end of the connecting elbow 46 is fixedly connected to the lower end of the air inlet pipe 41, and is used to collect the cooling water flowing out of the gas-liquid cooling device 4; the other end is connected to the drainage pipe 45, and the collected cooling water is uniformly transmitted to the cooling water tank by the drainage pipe 45 for continued circulation.

[0027] Specifically, Figure 3As shown, the automatic cleaning device 6 is composed of a cleaning water pipe 61, several groups of cleaning spray mechanisms 62 and a cleaning water tank 63; the cleaning water tank 63 is fixedly connected to the bottom of the high temperature resistant exhaust pipe 3 and is communicated with the cleaning water pipe 61; the cleaning spray mechanism 62 is fixedly connected to the inner wall of the high temperature resistant exhaust pipe 3, and both are communicated with the cleaning water tank 63. The cleaning agent in the cleaning water tank 63 is transferred to the cleaning spray mechanism 62 through a water pump, and the dust particles adhered to the inner wall of the high temperature resistant exhaust pipe 3 are cleaned by spraying, thereby improving the heat dissipation effect of the high temperature resistant exhaust pipe 3.

[0028] Specifically, Figure 1 and Figure 4 As shown, the side wall of the special-shaped connector 2 is provided with an air inlet 21, and the end of the high-temperature resistant exhaust pipe 3 is provided with an air outlet. The high-temperature exhaust gas 9 is introduced from the air inlet 21 and cooled through the high-temperature resistant exhaust pipe 3, and then discharged from the air outlet. The cooling air 10 of the gas-liquid cooling device 4 enters from the air inlet pipe 41, takes away the heat of the contact surface between the gas-liquid cooling device 4 and the high-temperature resistant exhaust pipe 3, and is discharged from the exhaust pipe 42; the high-temperature resistant exhaust pipe 3 and the gas-liquid cooling device 4 are connected to the high-temperature resistant exhaust pipe 3. The contact parts of the tube 3 are welded with corrugated metal plates, which can increase the contact area between the gas-liquid cooling device 4 and the high-temperature resistant exhaust gas pipe 3. Compared with traditional metal plates, the heat exchange efficiency of the corrugated metal plate partition wall is improved by 50%; an explosion-proof membrane 7 is installed at the bottom end of the special-shaped connector 2 to prevent damage to the gas-liquid cooling device 4 and the high-temperature resistant exhaust gas pipe 3 due to excessive air pressure caused by a fault; a number of inspection holes 8 are provided on the box body 1, and when a fault occurs, maintenance can be carried out directly through the inspection hole 8.

[0029] The above description is only a description of the preferred embodiments of the present invention, and is not intended to limit the scope of the present invention. Any changes or modifications made by a person skilled in the art in the field of the present invention based on the above disclosure shall fall within the scope of protection of the claims.

Claims

1. An exhaust gas heat exchange cooling system, characterized in that: It comprises a box body (1), a special-shaped connector (2), a high-temperature resistant exhaust pipe (3), a plurality of gas-liquid cooling devices (4), a plurality of maintenance air joints (5) and an automatic cleaning device (6); The special-shaped connector (2) is fixedly connected to the top of the box (1) and is communicated with the high-temperature resistant exhaust gas pipe (3) inside the box (1); The gas-liquid cooling device (4) passes through the box (1) and the high-temperature resistant exhaust gas pipe (3) in sequence along the vertical direction; a plurality of groups of the gas-liquid cooling devices (4) are arranged in sequence at the same intervals along the vertical direction; The automatic cleaning device (6) is fixedly connected to the inside of the high temperature resistant exhaust gas pipe (3) and cleans dust particles adhering to the inner wall of the high temperature resistant exhaust gas pipe (3) by spraying a cleaning agent, thereby improving the heat dissipation effect of the high temperature resistant exhaust gas pipe (3); The maintenance air joint (5) is fixedly connected between the gas-liquid cooling devices (4) and is used for maintenance of the gas-liquid cooling devices (4); The gas-liquid cooling device (4) is composed of an air inlet pipe (41), an air outlet pipe (42), a liquid cooling mechanism and a drainage mechanism; the air inlet pipe (41) and the air outlet pipe (42) are respectively located at two ends of the gas-liquid cooling device (4), and the heat of the contact surface between the gas-liquid cooling device (4) and the high-temperature resistant exhaust pipe (3) is taken away by the flowing air; the liquid cooling mechanism is located inside the gas-liquid cooling device (4), and the contact surface between the gas-liquid cooling device (4) and the high-temperature resistant exhaust pipe (3) is cooled by spraying circulating cooling water; The liquid cooling mechanism comprises a cooling water pipe (43) and a plurality of cooling spray mechanisms (44); the cooling spray mechanisms (44) are all in communication with the cooling water pipe (43), and cooling water is provided to the cooling spray mechanisms (44) via an external circulating water pump; the cooling spray mechanisms (44) are all fixedly connected to the upper part of the gas-liquid cooling device (4), and cool the contact surface between the gas-liquid cooling device (4) and the high-temperature resistant exhaust gas pipe (3) from top to bottom; The drainage mechanism comprises a drainage pipe (45) and a plurality of connecting elbows (46); one end of the connecting elbow (46) is fixedly connected to the lower end of the air inlet pipe (41) and is used to collect cooling water flowing out of the gas-liquid cooling device (4); the other end is connected to the drainage pipe (45), and the collected cooling water is uniformly transmitted to the cooling water tank by the drainage pipe (45).

2. The exhaust gas heat exchange cooling system according to claim 1, characterized in that: The exhaust pipe (42) is provided with a cooling fan (47) to increase the flow rate of air in the gas-liquid cooling device (4) and improve the cooling effect.

3. The exhaust gas heat exchange cooling system according to claim 1, characterized in that: The automatic cleaning device (6) is composed of a cleaning water pipe (61), a plurality of cleaning spray mechanisms (62) and a cleaning water tank (63); the cleaning water tank (63) is fixedly connected to the bottom of the high temperature resistant exhaust gas pipe (3) and is in communication with the cleaning water pipe (61); the cleaning spray mechanisms (62) are fixedly connected to the inner wall of the high temperature resistant exhaust gas pipe (3) and are both in communication with the cleaning water tank (63).

4. The exhaust gas heat exchange cooling system according to claim 1, characterized in that: The side wall of the special-shaped connector (2) is provided with an air inlet (21), and the end of the high-temperature resistant exhaust gas pipe (3) is provided with an air outlet; the high-temperature exhaust gas (9) is introduced from the air inlet (21), passes through the high-temperature resistant exhaust gas pipe (3), is cooled, and then is discharged from the air outlet.

5. The exhaust gas heat exchange cooling system according to claim 1, characterized in that: The high temperature resistant exhaust gas pipe (3) and the contact portion between the gas-liquid cooling device (4) and the high temperature resistant exhaust gas pipe (3) are both welded with corrugated metal plates.

6. The exhaust gas heat exchange cooling system according to claim 1, characterized in that: An explosion-proof membrane (7) is installed at the bottom end of the special-shaped connector (2).

7. The exhaust gas heat exchange cooling system according to claim 1, characterized in that: The box body (1) is provided with a plurality of inspection holes (8).

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