CN218723427U - Waste heat recovery system of thermal power plant - Google Patents

Abstract

The utility model proposes a thermal power plant waste heat recovery system, which belongs to the technical field of waste heat recovery, and includes a heat recovery box, on which a processor is fixedly connected, the processor is connected with a water tank, and the heat recovery box is provided with an air inlet for heat recovery. The tank is fixedly connected with a heat conduction cylinder component and forms a water cavity between it and the heat recovery tank; the cleaning component is movably connected with the heat recovery tank, and the cleaning component is movably connected with a conveying component, which communicates with the water cavity, and communicates with the water tank; The flue gas with a large amount of heat enters the heat recovery box, and the flue gas exchanges heat with the water through the heat conduction cylinder assembly. The cleaning component cleans the inner wall of the heat conduction cylinder component to improve the heat exchange efficiency. At the same time, the cleaning component drives the delivery component to send the low-temperature water in the water tank into the water The chamber improves the heat exchange efficiency. The flue gas then enters the processor for treatment and then is discharged into the water tank. The water in the water tank washes the flue gas and absorbs the heat in the flue gas, which has the advantage of good waste heat recovery effect.

Description

A thermal power plant waste heat recovery system

technical field

The utility model belongs to the technical field of waste heat recovery, in particular to a water recycling device for a thermal power plant.

Background technique

A thermal power plant, referred to as a thermal power plant, is a factory that uses combustibles (such as coal) as fuel to produce electrical energy. Its basic production process is: when the fuel is burned, the water is heated to generate steam, and the chemical energy of the fuel is converted into thermal energy. The steam pressure drives the steam turbine to rotate, and the thermal energy is converted into mechanical energy. Then the steam turbine drives the generator to rotate, and the mechanical energy is converted into electrical energy. The motive force is usually a steam engine or a gas turbine.

When the existing thermal power plants use coal to generate electricity, the flue gas produced by the coal contains a large amount of heat. When the waste heat is recovered, the dust in the flue gas is not filtered. In this way, when the flue gas is transported for waste heat recovery, the flue gas The dust will be adsorbed on the inner wall of the heat exchange device. In the long run, it will seriously affect the recovery of waste heat, resulting in poor recovery of waste heat and still causing a large amount of heat loss. Therefore, it is necessary to design a waste heat recovery system for thermal power plants.

Utility model content

The purpose of the utility model is to provide a thermal power plant waste heat recovery system, aiming at solving the problems existing in the background technology.

In order to achieve the above purpose, the utility model provides the following technical solutions: a thermal power plant waste heat recovery system, including a heat recovery box, the heat recovery box is fixedly connected with a processor, the processor communicates with the water tank, and the heat recovery box There is an air inlet on the top, and it is characterized in that it also includes a heat conduction cylinder assembly, a cleaning assembly and a conveying assembly. The heat conduction cylinder assembly is coaxially arranged inside the heat recovery box, and water Cavity, heat conduction cylinder assembly includes heat conduction cylinder and sealing ring, the heat conduction cylinder is a hollow cylinder, the number of seal rings is two, the two seal rings are respectively fixed at both ends of the heat conduction cylinder, and the two seal rings are respectively fixedly connected with the heat recovery box The cleaning assembly is arranged inside the heat conducting cylinder assembly for cleaning the inner wall of the heat conducting cylinder assembly; the conveying assembly communicates with the water cavity, and at the same time communicates with the water tank, and the conveying assembly is connected to the cleaning assembly , the conveying component intermittently sends the low-temperature water in the water tank into the water cavity; the heat recovery tank is fixedly connected with a filter element, and the filter element is arranged between the air inlet and the heat conduction cylinder assembly.

As a preferred solution of the present utility model, the cleaning assembly includes a motor, a rotating shaft, a connecting rod and a cleaning brush. The motor is fixedly connected to the heat recovery box, and the output shaft of the motor is fixedly connected to the rotating shaft. The rotating shaft arranged in the axial direction runs through the filter element, and the rotating shaft is fixedly connected with at least two connecting rods. on the rod, and the cleaning brushes collide with the inner wall of the heat conducting cylinder assembly.

As a preferred solution of the present utility model, the cleaning assembly further includes a second cleaning brush, the second cleaning brush is fixedly connected to the rotating shaft, and the second cleaning brush interferes with the filter element.

As a preferred solution of the present utility model, the conveying assembly includes a cam, a piston, a compression cylinder and an elastic member, the cam is fixedly connected with the cleaning assembly, the piston is arranged on one side of the cam, and the piston is connected to the cleaning assembly. The compression cylinder is slidingly connected, the elastic member is sleeved on the piston, the compression cylinder communicates with the water tank through a communication pipe, and at the same time the compression cylinder communicates with the water chamber through a communication pipe, and the There is a one-way valve on it.

As a preferred solution of the present invention, the processor is fixedly connected with an exhaust pipe, the exhaust pipe is fixedly connected with a water tank, and the exhaust port of the exhaust pipe is arranged at the bottom of the water tank.

As a preferred solution of the present utility model, the filter element is a filter screen.

Through the above design scheme, the utility model can bring the following beneficial effects: the flue gas containing a large amount of heat enters the heat recovery box, the flue gas exchanges heat with water through the heat conduction cylinder assembly, and the cleaning component cleans the inner wall of the heat conduction cylinder assembly to improve the heat exchange efficiency At the same time, the cleaning component drives the conveying component to intermittently send the low-temperature water in the water tank into the water cavity, so that the temperature difference between the flue gas and the low-temperature water is large, which is conducive to improving the efficiency of heat exchange, and the flue gas then enters the processor for processing After being discharged into the water tank, the water in the water tank washes the flue gas and absorbs the heat in the flue gas, which has the advantage of good waste heat recovery effect.

Description of drawings

Fig. 1 is a schematic structural diagram of a thermal power plant waste heat recovery system provided by an embodiment of the present invention;

Fig. 2 is a front view of a thermal power plant waste heat recovery system provided by an embodiment of the present invention;

Fig. 3 is a schematic structural diagram of the heat conduction cylinder assembly provided by the embodiment of the present invention.

In the figure: 1-heat recovery box, 11-air inlet, 2-heat conduction cylinder assembly, 21-sealing ring, 22-heat conduction cylinder, 3-water cavity, 4-filter, 5-cleaning component, 51-motor, 52-rotating shaft, 53-connecting rod, 54-cleaning brush one, 55-cleaning brush two, 6-conveying assembly, 61-cam, 62-piston, 63-compression cylinder, 64-elastic member, 7-water tank, 8- processor, 9-exhaust pipe.

Detailed ways

In order to make the purpose, technical solution and advantages of the utility model clearer, the utility model will be further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the utility model, and are not intended to limit the utility model.

The specific implementation of the utility model is described in detail below in conjunction with specific embodiments.

As shown in Figures 1 to 3, it is an embodiment of the present utility model, a thermal power plant waste heat recovery system, comprising: a heat recovery box 1, the heat recovery box 1 is fixedly connected with a processor 8, and the processor 8 communicates with a water tank 7, the heat recovery tank 1 is provided with an air inlet 11, the heat conduction cylinder assembly 2 is coaxially arranged inside the heat recovery tank 1, and the heat conduction cylinder assembly 2 and the heat recovery tank 1 form a The water chamber 3 and the heat conduction cylinder assembly 2 include a heat conduction cylinder 22 and a sealing ring 21. The heat conduction cylinder 22 is a hollow cylinder, and the number of the seal rings 21 is two. The two seal rings 21 are respectively fixed at both ends of the heat conduction cylinder 22. The sealing rings 21 are respectively fixedly connected with the heat recovery box 1; the cleaning assembly 5 is arranged inside the heat conducting cylinder assembly 2 for cleaning the inner wall of the heat conducting cylinder assembly 2; the conveying assembly 6 is connected to the cleaning assembly 5, and the conveying assembly 6 The component 6 communicates with the water cavity 3, and the delivery component 6 communicates with the water tank 7, and the delivery component 6 is driven by the cleaning component 5 to intermittently send the low-temperature water in the water tank 7 into the water cavity 3; The heat recovery box 1 is fixedly connected with a filter element 4, the filter element 4 can be a filter screen, and the filter element 4 is arranged between the air inlet 11 and the heat conduction cylinder assembly 2; it should be noted that the The processor 8 is used to process the flue gas to make the flue gas meet the discharge requirements, and the processor 8 is a mature technology, so it will not be described in detail.

In this embodiment, the processor 8 is fixedly connected with an exhaust pipe 9, and the exhaust pipe 9 is fixedly connected with the water tank 7, and the exhaust port of the exhaust pipe 9 is arranged at the bottom of the water tank 7, so The exhaust pipe 9 communicates with the inner cavity of the processor 8, and the inner cavity of the processor 8 communicates with the inner cavity of the heat recovery box 1; the cleaning assembly 5 includes a motor 51, a rotating shaft 52, a connecting rod 53, a cleaning Brush one 54 and cleaning brush two 55, the motor 51 is fixedly connected to the heat recovery box 1, the motor 51 is fixedly connected to the rotating shaft 52, and the rotating shaft 52 is fixedly connected to at least two connecting rods 53 , the connecting rod 53 is fixedly connected with the cleaning brush 1 54, and the cleaning brush 1 54 is in contact with the inner wall of the heat conducting cylinder assembly 2, and the heat conducting cylinder assembly 2 is made of a material with good thermal conductivity, such as glass , copper alloy and other materials, the rotating shaft 52 is connected with the conveying assembly 6, the cleaning brush 2 55 is fixedly connected with the rotating shaft 52, the rotating shaft 52 runs through the filter element 4, and the cleaning brush 2 55 is against the Filter 4: the flue gas containing a large amount of heat, dust and other impurities enters the heat recovery box 1 and is preliminarily filtered by the filter 4 to remove part of the dust and impurities in the flue gas and reduce the adhesion of dust and impurities to the inner wall of the heat conduction cylinder 22 , which in turn affects the heat exchange between the flue gas and water, and then the flue gas enters the processor 8 after being processed, and then enters the water tank 7 through the exhaust pipe 9, and the flue gas is washed out of the water tank 7 after being washed by water in the water tank 7, and the flue gas The air further transmits the remaining heat to the water in the water tank 7, and at the same time, the motor 51 drives the rotating shaft 52 to rotate, and the rotating shaft 52 drives the cleaning brush 1 54 to clean the inner wall of the heat conducting cylinder 22 through the connecting rod 53, so as to prevent the heat conducting cylinder 22 from accumulating dust on the inner wall of the long-term use The rotating shaft 52 drives the cleaning brush 2 55 to rotate and clean the filter element 4 to prevent the filter element 4 from clogging. The rotating shaft 52 drives the conveying assembly 6 to intermittently send the low-temperature water in the water tank 7 into the water cavity 3, so that the flue gas and the low-temperature water The large temperature difference between them is conducive to improving the efficiency of heat exchange and has the advantage of good waste heat recovery effect.

Please refer to Figures 1 to 3, in one embodiment of the present utility model, the compression cylinder 63 communicates with the water tank 7 through a communication pipe, and the compression cylinder 63 communicates with the water chamber 3 through a communication pipe, so The connecting pipe is provided with a corresponding one-way valve to control the direction of water flow. The elastic member 64 can be a spring, and the elastic member 64 is in a compressed state. The piston 62 resists the cam 61 under the action of the elastic member 64, The cam 61 is fixedly connected to the rotating shaft 52 of the cleaning assembly 5, and the cleaning assembly 5 drives the cam 61 to rotate, which realizes the intermittent type, that is, during the rotation of the cam 61, the elastic member 64 drives the piston 62 to move linearly reciprocatingly, and the piston 62 moves left and right. When shifting, the piston 62 cooperates with the one-way valve to suck the water in the water tank 7 into the compression cylinder 63, and when the piston 62 moves to the right, the water in the compression cylinder 63 is pressed into the water chamber 3 to realize the intermittent type, which is conducive to water retention for a period of time Heat exchange with the flue gas in the water chamber 3, utilizing the waste heat in the flue gas, has the advantage of good waste heat recovery effect.

working principle:

The flue gas containing a large amount of heat enters the heat recovery box 1, and the flue gas exchanges heat with water through the heat conduction cylinder assembly 2. The cleaning assembly 5 cleans the inner wall of the heat conduction cylinder assembly 2 to improve the heat exchange efficiency. The low-temperature water in 7 is sent into the water chamber 3 to improve the heat exchange efficiency. The flue gas then enters the processor 8 for treatment and then is discharged into the water tank 7. The water in the water tank 7 washes the flue gas and absorbs the heat in the flue gas , has the advantage of good waste heat recovery effect.

The above descriptions are only preferred embodiments of the present utility model, and are not intended to limit the present utility model. Any modifications, equivalent replacements and improvements made within the spirit and principles of the present utility model shall be included in this utility model. within the scope of protection of utility models.

Claims (6)

1. The utility model provides a waste heat recovery system of thermal power plant, includes the heat recovery case, heat recovery case fixedly connected with treater, treater and water tank intercommunication, be equipped with air inlet, its characterized in that on the heat recovery case: the heat conduction cylinder assembly is coaxially arranged inside the heat recovery box, a water cavity is formed between the heat conduction cylinder assembly and the heat recovery box, the heat conduction cylinder assembly comprises a heat conduction cylinder and two sealing rings, the heat conduction cylinder is a hollow cylinder, the two sealing rings are respectively and fixedly arranged at two ends of the heat conduction cylinder, and the two sealing rings are respectively and fixedly connected with the heat recovery box; the cleaning assembly is arranged in the heat conduction cylinder assembly and is used for cleaning the inner wall of the heat conduction cylinder assembly; the conveying assembly is communicated with the water cavity, meanwhile, the conveying assembly is communicated with the water tank, the conveying assembly is connected to the cleaning assembly, and the conveying assembly intermittently conveys low-temperature water in the water tank into the water cavity; the heat recovery case fixedly connected with filters, filter and locate the air inlet with between the heat conduction section of thick bamboo subassembly.

2. The waste heat recovery system of the thermal power plant as claimed in claim 1, wherein the cleaning assembly includes a motor, a rotating shaft, a connecting rod and a first cleaning brush, the motor is fixedly connected to the heat recovery tank, an output shaft of the motor is fixedly connected to the rotating shaft, the rotating shaft axially arranged penetrates through the filter member, the rotating shaft is fixedly connected to at least two connecting rods, the number of the first cleaning brushes is the same as that of the connecting rods, the first cleaning brushes are in one-to-one correspondence with the connecting rods, the first cleaning brushes are fixedly connected to the connecting rod, and the first cleaning brushes abut against the inner wall of the heat conducting tube assembly.

3. The waste heat recovery system of a thermal power plant according to claim 2, wherein the cleaning assembly further comprises a second cleaning brush, the second cleaning brush is fixedly connected with the rotating shaft, and the second cleaning brush abuts against the filter member.

4. The waste heat recovery system of the thermal power plant as claimed in claim 1, wherein the conveying assembly includes a cam, a piston, a compression cylinder and an elastic member, the cam is fixedly connected to the cleaning assembly, the piston is disposed on one side of the cam, the piston is slidably connected to the compression cylinder, the elastic member is sleeved on the piston, the compression cylinder is communicated with the water tank through a communicating pipe, the compression cylinder is communicated with the water chamber through a communicating pipe, and the communicating pipe is provided with a check valve.

5. The waste heat recovery system of the thermal power plant as claimed in claim 1, wherein the processor is fixedly connected with an exhaust pipe, the exhaust pipe is fixedly connected with a water tank, and an exhaust port of the exhaust pipe is arranged at the bottom of the water tank.

6. The heat recovery system of a thermal power plant as recited in claim 1, wherein the filter element is a screen.

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