Coal-fired power plant boiler flue gas waste heat recovery device
By introducing spiral guide plates and spiral heat recovery pipes into the waste heat recovery device of flue gas in coal-fired power plant boilers, the residence time of flue gas is extended and the contact area is increased. Combined with flow control and temperature detection, the problem of insufficient waste heat recovery of flue gas is solved, and efficient heat transfer and energy utilization are achieved.
Patent Information
- Application Number
- CN202520045461.4
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-01-09
- Publication Date
- 2025-12-26
- Estimated Expiration
- 2035-01-09
AI Technical Summary
In existing waste heat recovery devices for flue gas from coal-fired power plant boilers, the contact time between the flue gas and the heat recovery pipe is short and the contact area is small, resulting in insufficient heat exchange and difficulty in improving heat recovery efficiency.
A spiral guide plate is used to guide the flue gas to flow along a spiral path, and a spiral heat recovery pipe is installed in the heat recovery frame to increase the contact area and residence time. Combined with a spiral liquid valve to control the flow rate and temperature detection equipment to monitor efficiency.
It achieves efficient recovery of waste heat from flue gas, improves the energy utilization efficiency of coal-fired power plants, ensures that the equipment operates at high efficiency, and realizes energy conservation and emission reduction.
Smart Images
Figure CN223726387U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model belongs to the technical field of waste heat recovery, specifically relates to a coal-fired power plant boiler flue gas waste heat recovery device. BACKGROUND
[0002] Under the current energy and environmental situation, as one of the main sources of power production, the energy utilization efficiency and environmental impact of coal-fired power plants have received extensive attention. The high-temperature flue gas generated by the boiler of a coal-fired power plant contains a large amount of recoverable heat energy.
[0003] The flue gas waste heat recovery devices in the prior art mostly use simple straight-tube heat recovery pipes or simple channel structures. In these devices, the flow path of the flue gas in the heat recovery device is relatively direct and simple, resulting in a short contact time between the flue gas and the heat recovery pipe. Moreover, due to the structural limitations, the contact area between the flue gas and the heat recovery pipe is relatively small, which makes the heat exchange process insufficient, and the heat recovery efficiency is difficult to effectively improve. Therefore, there is a need for a coal-fired power plant boiler flue gas waste heat recovery device to solve the above problems. SUMMARY
[0004] The purpose of the utility model is to provide a coal-fired power plant boiler flue gas waste heat recovery device to solve the problems raised in the background.
[0005] To achieve the above purpose, the utility model provides the following technical scheme: a coal-fired power plant boiler flue gas waste heat recovery device, comprising a bottom plate, a boiler body is fixedly arranged on the bottom plate, an outlet pipe is communicatively arranged on the boiler body, a filter cartridge is communicatively arranged at one end of the outlet pipe, a heat recovery frame is communicatively arranged on the filter cartridge through a connecting pipe, the lower surface of the heat recovery frame is fixedly arranged on the bottom plate through a connecting block, a spiral guide plate is fixedly arranged in the heat recovery frame, a spiral heat recovery pipe is arranged in the heat recovery frame, the spiral heat recovery pipe is located in the spiral guide plate, and an exhaust pipe is communicatively arranged on the back of the heat recovery frame.
[0006] By arranging the spiral guide plate, the spiral guide plate in the heat recovery frame can guide the flue gas to flow in a spiral path. When the flue gas enters the heat recovery frame from the connecting pipe, the spiral guide plate changes the flow direction of the flue gas, so that the flue gas no longer flows in a straight line. This spiral flow mode prolongs the residence time of the flue gas in the heat recovery frame, allowing the flue gas to have more time for heat exchange with the heat recovery components. At the same time, the spiral heat recovery pipe located in the spiral guide plate forms a good contact form with the spirally flowing flue gas. The spiral heat recovery pipe increases the contact area with the flue gas. Compared with the traditional straight-tube heat recovery pipe, it can more fully absorb the heat in the flue gas. During the flow of the flue gas along the spiral guide plate, the heat can be efficiently transferred to the medium in the spiral heat recovery pipe, achieving efficient recovery of the flue gas waste heat.
[0007] As a preferred implementation, the filter cartridge is fixedly arranged on the bottom plate, and the connecting pipe is provided with a smoke inlet valve.
[0008] As a preferred implementation, one side of the spiral heat recovery pipe is provided with a liquid inlet pipe.
[0009] As a preferred implementation, the liquid inlet pipe is provided with a liquid inlet valve.
[0010] As a preferred implementation, the other end of the spiral heat recovery pipe is provided with a liquid outlet pipe.
[0011] As a preferred implementation, the liquid outlet pipe is provided with a temperature detection device.
[0012] By setting the liquid inlet valve, the liquid flow into the spiral heat recovery pipe can be accurately controlled, which helps to make the liquid and the spiral flowing flue gas fully and efficiently exchange heat, and maximize the absorption of the waste heat in the flue gas. In addition, the temperature detection device provided on the liquid outlet pipe at the other end of the spiral heat recovery pipe can monitor the temperature of the outflowing liquid in real time. Through the temperature data, the working efficiency of the heat recovery device can be intuitively understood, and the operator can timely find and handle the problems such as reduced heat exchange efficiency, so as to ensure that the whole device always maintains in an efficient operation state, and further improves the energy utilization efficiency of the coal-fired power plant, and realizes the goal of energy saving and emission reduction.
[0013] Compared with the prior art, the utility model has the advantages that:
[0014] The spiral guide plate inside the heat recovery frame can guide the flue gas to flow along a spiral path. When the flue gas enters the heat recovery frame from the connecting pipe, the spiral guide plate changes the flow direction of the flue gas, so that the flue gas no longer flows in a simple straight line. This spiral flow mode prolongs the residence time of the flue gas in the heat recovery frame, allowing the flue gas to have more time to exchange heat with the heat recovery components. At the same time, the spiral heat recovery pipe located in the spiral guide plate forms a good contact form with the spiral flowing flue gas. The spiral heat recovery pipe increases the contact area with the flue gas. Compared with the traditional straight pipe type heat recovery pipe, it can more fully absorb the heat in the flue gas. During the flow of the flue gas along the spiral guide plate, the heat can be efficiently transferred to the medium in the spiral heat recovery pipe, realizing efficient recovery of the waste heat of the flue gas.
[0015] The utility model discloses, through setting up screw liquid valve, can accurate control the liquid flow of entering the screw heat recovery pipe, this helps to make liquid and the smoke of spiral flow carry out sufficient and efficient heat exchange, the waste heat in the smoke is absorbed to the maximum degree, in addition, the temperature detection equipment that sets up on the liquid outlet pipe of the other end intercommunication of screw heat recovery pipe can real -time monitoring the temperature of flowing liquid, through the temperature data, can intuitively understand the work efficiency of heat recovery device, and the operator discovers and handles possible heat exchange efficiency reduction etc. problem in time conveniently, ensure that the whole device always maintains in the efficient operating state, and then promote the energy utilization efficiency of coal -fired power plant, realize the goal of energy saving and emission reduction. BRIEF DESCRIPTION OF DRAWINGS
[0016] Figure 1 It is the schematic diagram of the three-dimensional structure of the utility model;
[0017] Figure 2 It is the schematic diagram of the three-dimensional structure of the utility model partial section;
[0018] Figure 3 It is the schematic diagram of the three-dimensional structure of the utility model heat recovery frame section;
[0019] Figure 4 It is the schematic diagram of the three-dimensional structure of the utility model rear view.
[0020] In the drawing: 1, bottom plate;2, boiler body;3, smoke outlet pipe;4, filter cartridge;5, link pipe;6, heat recovery frame;7, link block;8, spiral guide plate;9, screw heat recovery pipe;10, enter smoke valve;11, liquid inlet pipe;12, liquid inlet valve;13, liquid outlet pipe;14, temperature detection equipment;15, smoke exhaust pipe. DETAILED DESCRIPTION
[0021] The utility model will be further described below in conjunction with the embodiment.
[0022] The following examples are used to illustrate the utility model, but cannot be used to limit the protection scope of the utility model. The conditions in the embodiment can be further adjusted according to specific conditions, and the simple improvement of the method of the utility model under the concept of the utility model belongs to the range of the utility model required protection.
[0023] Please refer to Figures 1-4The utility model provides a kind of coal-fired power plant boiler flue gas waste heat recovery device, including bottom plate 1, bottom plate 1 is fixedly provided with boiler body 2, boiler body 2 is communicated with and is provided with smoke pipe 3, one end of smoke pipe 3 is communicated with and is provided with filter cartridge 4, filter cartridge 4 is communicated with and is provided with heat recovery frame 6 by link pipe 5, the lower surface of heat recovery frame 6 is fixedly set on bottom plate 1 by link block 7, spiral guide plate 8 is fixedly set in heat recovery frame 6, spiral heat recovery pipe 9 is provided in heat recovery frame 6, spiral heat recovery pipe 9 is located in spiral guide plate 8, the back of heat recovery frame 6 is communicated with and is provided with flue gas exhaust pipe 15, by setting spiral guide plate 8, the spiral guide plate 8 in heat recovery frame 6 can guide flue gas to flow according to spiral path, when flue gas enters heat recovery frame 6 from link pipe 5, spiral guide plate 8 changes the flow direction of flue gas, so that flue gas is no longer simple straight flow, this spiral flow mode prolongs the residence time of flue gas in heat recovery frame 6, so that flue gas has more sufficient time to exchange heat with heat recovery component, simultaneously, spiral heat recovery pipe 9 in spiral guide plate 8 forms good contact form with spiral flow flue gas, spiral heat recovery pipe 9 increases the contact area with flue gas, compared with traditional straight pipe type heat recovery pipe, can more fully absorb heat in flue gas, in the process that flue gas flows along spiral guide plate 8, heat can be efficiently transferred to medium in spiral heat recovery pipe 9, realizes the efficient recovery of flue gas waste heat.
[0024] Filter cartridge 4 is fixedly set on bottom plate 1, and inlet valve 10 is arranged on link pipe 5.
[0025] One side of spiral heat recovery pipe 9 is communicated with and is provided with liquid inlet pipe 11.
[0026] Inlet valve 12 is arranged on liquid inlet pipe 11.
[0027] The other end of spiral heat recovery pipe 9 is communicated with and is provided with liquid outlet pipe 13.
[0028] Temperature detection equipment 14 is arranged on liquid outlet pipe 13, by setting inlet valve 12, the liquid flow entering spiral heat recovery pipe 9 can be accurately controlled, which helps to make liquid and spiral flow flue gas fully and efficiently exchange heat, to maximize the absorption of waste heat in flue gas, in addition, temperature detection equipment 14 arranged on liquid outlet pipe 13 communicated with the other end of spiral heat recovery pipe 9 can monitor the temperature of outflowing liquid in real time, through the temperature data, the working efficiency of heat recovery device can be intuitively understood, so that operating personnel can timely find and handle possible heat exchange efficiency reduction problems, ensure that the whole device always maintains in efficient operation state, and then improve the energy utilization efficiency of coal-fired power plant, realize the goal of energy saving and emission reduction.
[0029] The working principle and use flow of the utility model are: when the boiler body 2 generates high-temperature flue gas, the flue gas enters the filter cylinder 4 through the smoke outlet pipe 3, the filter medium in the filter cylinder 4 filters out the large-particle impurities in the flue gas, the filtered flue gas enters the heat recovery frame 6 through the connecting pipe 5, the smoke inlet valve 10 can adjust the flow of the flue gas entering the heat recovery frame 6 according to actual needs, the flue gas entering the heat recovery frame 6 flows in a spiral shape under the guidance of the spiral guide plate 8, the spiral flow mode prolongs the residence time of the flue gas in the heat recovery frame 6, simultaneously, the heat medium enters the spiral heat recovery pipe 9 through the liquid inlet pipe 11, the liquid inlet valve 12 controls the flow of the heat medium, in the heat recovery frame 6, the spiral flue gas fully contacts the spiral heat recovery pipe 9, heat is transferred from the flue gas to the heat medium, the heat medium after heat exchange flows out through the liquid outlet pipe 13, the temperature detection equipment 14 on the liquid outlet pipe 13 monitors the temperature of the heat medium in real time, the operator can judge the operation efficiency of the heat recovery device according to the temperature data, the low-temperature flue gas after heat recovery is discharged to the atmosphere through the smoke exhaust pipe 15, since the heat in the flue gas has been recovered, the temperature of the discharged flue gas is low, and the heat pollution to the environment is reduced.
[0030] Although the embodiments of the utility model have been shown and described, it can be understood by those skilled in the art that various changes, modifications, replacements and variations can be made to these embodiments without departing from the principles and spirits of the utility model, the scope of the utility model is defined by the appended claims and their equivalents.
Claims
1. A coal-fired power plant boiler flue gas waste heat recovery device, comprising a bottom plate (1), characterized in that: The bottom plate (1) is fixedly provided with a boiler body (2), the boiler body (2) is communicated with a smoke outlet pipe (3), one end of the smoke outlet pipe (3) is communicated with a filter cylinder (4), the filter cylinder (4) is communicated with a heat recovery frame (6) through a connecting pipe (5), the lower surface of the heat recovery frame (6) is fixedly arranged on the bottom plate (1) through a connecting block (7), the inside of the heat recovery frame (6) is fixedly provided with a spiral guide plate (8), the heat recovery frame (6) is provided with a spiral heat recovery pipe (9), the spiral heat recovery pipe (9) is located in the spiral guide plate (8), and the back of the heat recovery frame (6) is communicated with a smoke exhaust pipe (15).
2. A coal-fired power plant boiler flue gas waste heat recovery device according to claim 1, characterized in that: The filter cylinder (4) is fixedly arranged on the bottom plate (1), and the connecting pipe (5) is provided with a smoke inlet valve (10).
3. A coal-fired power plant boiler flue gas waste heat recovery device according to claim 1, characterized in that: One side of the spiral heat recovery pipe (9) is communicated with a liquid inlet pipe (11).
4. A coal-fired power plant boiler flue gas waste heat recovery device according to claim 3, characterized in that: The liquid inlet pipe (11) is provided with a liquid inlet valve (12).
5. A coal-fired power plant boiler flue gas waste heat recovery device according to claim 1, characterized in that: The other end of the spiral heat recovery pipe (9) is communicated with a liquid outlet pipe (13).
6. A coal-fired power plant boiler flue gas waste heat recovery device according to claim 5, characterized in that: The liquid outlet pipe (13) is provided with a temperature detection device (14).