Flue gas waste heat recovery device
By designing a flue gas waste heat recovery device including condenser, liquid storage tank, expansion valve, flue, gas liquid separator, and compressor, use the combination of heat -absorbing catheter and thermal conductivity to absorb the heat of the flue gas, and use the condenser to perform through the condenser device for performed by the condenser. The heat exchange solves the problem of high temperature and heat in the existing technology, and it is difficult to recover and utilize, and achieves efficient heat recovery and utilization.
Patent Information
- Application Number
- CN202420267312.8
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-02-04
- Publication Date
- 2025-01-28
- Estimated Expiration
- 2034-02-04
AI Technical Summary
In the prior art, the flue gas of gas steam boilers is directly discharged, which is inconvenient for energy conservation and emission reduction. The ventilation ducts and heat exchangers are complex, which makes it difficult to effectively recycle and utilize the high-temperature heat of the flue gas, resulting in energy waste.
Design a type of flue gas waste heat recovery device, including condenser, liquid storage tank, expansion valve, flue, gas liquid separator and compressor, and absorb the calories in the flue gas by combining heat -absorbing catheter and thermal conductivity. The condenser performs heat exchange to achieve heat recovery and utilization.
Through a simple structural design, the device efficiently recover the remaining heat in the flue gas, improves the heat utilization rate, reduces energy waste, and simplifies the process, and improves work efficiency.
Smart Images
Figure CN222418051U_ABST
Abstract
Description
Technical Field
[0001] The utility model belongs to the technical field of flue gas recovery, and in particular relates to a flue gas waste heat recovery device. Background Art
[0002] In the energy expenditure of industrial production process, the proportion of waste heat from exhaust gas accounts for about 15% to 35%, and the heat loss of flue gas accounts for 5% to 8% of all heat losses. Therefore, how to efficiently recover the waste heat in flue gas is an urgent problem to be solved in the existing technology. The recovery and reuse of waste heat in flue gas can not only save a lot of energy, but also greatly reduce air pollution, and at the same time reduce the production cost of enterprises, which is also of great practical significance for achieving the strategic requirements of energy conservation and emission reduction.
[0003] In the prior art, the flue gas of the gas steam boiler is directly discharged, which is not convenient for energy saving and emission reduction, and it is not convenient to recycle the high-temperature flue gas, resulting in energy waste. In order to solve the problem of inconvenience in recycling the high-temperature flue gas and causing energy waste, the prior art generally uses ventilation ducts and heat exchangers to recycle the flue gas, but the ventilation duct and heat exchanger are not convenient for direct use, the process is complicated, and thus leads to the problem of reduced work efficiency.
[0004] To this end, we propose a flue gas waste heat recovery device. Summary of the invention
[0005] In view of the above deficiencies in the prior art, the technical problem to be solved by the present invention is to provide a flue gas waste heat recovery device to solve the problem of existing flue gas preheating.
[0006] In order to achieve the above objectives, the present invention adopts the following technical solutions:
[0007] A flue gas waste heat recovery device comprises a condenser, a liquid storage tank, an expansion valve, a flue, a gas-liquid separator and a compressor, wherein the output port of the condenser is connected to the input end of the liquid storage tank through a liquid pipe; the output end of the liquid storage tank is connected to the input end of the expansion valve, and the output end of the expansion valve is connected to a heat absorption pipe provided in the flue; the output end of the heat absorption pipe is connected to the input end of the gas-liquid separator through an air pipe, the output end of the gas-liquid separator is connected to the input end of the compressor, and the output end of the compressor is connected to the input port of the condenser; the gas-liquid separator and the compressor are electrically connected to an external control box, and the control box is used to control the start and stop of the entire device and to monitor the working status of the device in real time.
[0008] Furthermore, in order to prevent impurities from entering the expansion valve and damaging the expansion valve, the output end of the liquid storage tank is connected to a first filter, and the output end of the first filter is connected to the input end of the expansion valve through a pipeline; the first filter can filter impurities in the refrigerant liquid output by the condenser.
[0009] Furthermore, in order to monitor the pressure entering the heat absorbing conduit in real time, a temperature sensor is provided at any position between the first filter and the heat absorbing conduit.
[0010] Furthermore, in order to improve the heat absorption efficiency of the heat absorption pipe and avoid more heat loss, a heat conduction plate is provided on the outside of the heat absorption pipe. The heat absorption pipe passes through the heat conduction plate and is distributed in a U shape inside the heat conduction plate. In order to be able to monitor the temperature of the heat absorption pipe at any time, a temperature sensor is provided at the input end of the heat absorption pipe.
[0011] Furthermore, in order to prevent the refrigerant that enters the heat absorbing pipe first from absorbing less heat or stopping absorbing heat after absorbing a part of the heat during the heat absorption process, several heat absorbing pipes are provided in the flue, and the several heat absorbing pipes are connected in parallel.
[0012] Furthermore, in order to achieve the connection between several heat absorbing tubes and the refrigerant input tube and evenly distribute the refrigerant, a liquid distributor is provided at the input end of the heat absorbing tube, and the liquid distributor is connected to the input end of the heat absorbing tube.
[0013] Furthermore, in order to facilitate the filtering of impurities in the input of the compressor, a second filter is provided between the output end of the gas-liquid separator and the input end of the compressor.
[0014] Furthermore, in order to facilitate real-time monitoring of the input pressure of the compressor, a pressure sensor is provided at any position between the output end of the second filter and the input end of the compressor.
[0015] In summary, due to the adoption of the above technical solution, the beneficial technical effects of the utility model are:
[0016] The output port of the condenser of a flue gas waste heat recovery device is connected to the input end of the expansion valve through a liquid pipe, and the output end of the expansion valve is connected to a heat absorbing conduit provided in the flue through a pipeline; the output end of the heat absorbing conduit is connected to the input end of the gas-liquid separator through an air pipe, the output end of the gas-liquid separator is connected to the input end of the compressor, and the output end of the compressor is connected to the input port of the condenser. In order to prevent impurities from entering the expansion valve and damaging the expansion valve, a refrigerant filter is connected between the output port and the expansion valve, and the refrigerant filter can filter impurities in the refrigerant liquid output by the condenser. In the utility model, the heat in the flue gas is recovered by the heat absorbing conduit, and then the heat in the flue gas is recovered and utilized by heat exchange with the condenser. The utility model has a simple structure and high heat recovery efficiency.
[0017] A flue gas waste heat recovery device increases the efficiency of a heat absorbing conduit in recovering heat in flue gas by arranging a heat conducting plate around the heat absorbing conduit. BRIEF DESCRIPTION OF THE DRAWINGS
[0018] Figure 1 It is a three-dimensional structural schematic diagram of the utility model.
[0019] Figure 2 The utility model is added with a top view of the flue 7.
[0020] Figure 3 For this utility model Figure 2 Schematic diagram of the structure without the flue casing.
[0021] Figure 4 For this utility model Figure 3 Side view of the lower middle side.
[0022] In the figure: condenser 1, output port 2, liquid pipe 3, liquid storage tank 4, first filter 5, expansion valve 6, flue 7, gas-liquid separator 8, second filter 5, compressor 10, input port 11, heat conduction plate 12, liquid separator 13, gas pipe 14, heat absorption pipe 15, control box 16. DETAILED DESCRIPTION
[0023] In order to make the purpose, technical solution and advantages of the utility model more clear, the utility model is further described in detail in combination with the embodiments. It should be understood that the specific embodiments described here are only used to explain the utility model content, and are not used to limit the utility model content. Example 1
[0024] In this embodiment, Figure 1-4 As shown, a flue gas waste heat recovery device includes a condenser 1, a liquid storage tank 4, a flue 7, a gas-liquid separator 8 and a compressor 10. The output port 2 of the condenser 1 is connected to the input end of the liquid storage tank 4 through a liquid pipe 3, and the output end of the liquid storage tank 4 is connected to a heat absorption pipe 15 provided in the flue 7; the output end of the heat absorption pipe 15 is connected to the input end of the gas-liquid separator 8 through an air pipe 14, the output end of the gas-liquid separator 8 is connected to the input end of the compressor 10, and the output end of the compressor 10 is connected to the input port 11 of the condenser 1; the gas-liquid separator 8 and the compressor 10 are electrically connected to an external control box 16, and the control box 16 is used to control the start and stop of the entire device and to monitor the working status of the device in real time.
[0025] In order to prevent impurities from entering the expansion valve 6 and damaging the expansion valve 6, the output end of the liquid storage tank 4 is connected to the input end of the first filter 5, the output end of the first filter 5 is linked to the input end of the expansion valve 6 through a pipeline, and the output end of the expansion valve 6 is connected to the heat absorption pipe 15 provided in the flue 7; the first filter 5 can filter impurities in the refrigerant liquid output by the condenser 1. In the utility model, the heat in the flue gas is recovered by the heat absorption pipe 15 and the heat conducting plate 12, and then the heat in the flue gas is recovered and utilized by heat exchange with the condenser 1. Example 2
[0026] In this embodiment, Figure 1-3 As shown, in order to monitor the pressure entering the heat absorbing conduit 15 in real time, a temperature sensor is provided at any position between the first filter 5 and the heat absorbing conduit 15 . Example 3
[0027] In this embodiment, Figure 1-3 As shown, in order to improve the heat absorption efficiency of the heat absorption pipe 15 and avoid more heat loss, a heat conducting plate 12 is provided on the outer side of the heat absorption pipe 15. The heat absorption pipe 15 passes through the heat conducting plate 12 and is distributed in a U shape in the heat conducting plate 12. In order to be able to detect the temperature of the heat absorption pipe 15 in real time, a temperature sensor is provided on the heat absorption pipe 15. Example 4
[0028] In this embodiment, Figure 1-3 As shown, in order to prevent the refrigerant agent that first enters the heat absorbing pipe 15 from absorbing less heat or stopping heat absorption after absorbing a part of the heat during the heat absorption process, the heat absorbing pipe 15 is provided with several heat absorbing pipes 15 in the flue 7, and the several heat absorbing pipes 15 are connected in parallel. In order to realize the connection between the several heat absorbing pipes 15 and the refrigerant agent input pipe and evenly distribute the refrigerant, the input end of the heat absorbing pipe 15 is provided with a liquid distributor 13, and the liquid distributor 13 is connected to the input end of the heat absorbing pipe 15. Example 5
[0029] In this embodiment, Figure 1-3 As shown, in order to facilitate the filtering of impurities in the input of the compressor 10, a second filter 9 is provided between the output end of the gas-liquid separator 8 and the input end of the compressor 10. In order to facilitate real-time monitoring of the input pressure of the compressor 10, a pressure sensor is provided at any position between the output end of the second filter 9 and the input end of the compressor 10.
[0030] The above description is a preferred embodiment of the utility model content and is not intended to limit the utility model content. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the utility model content should be included in the protection scope of the utility model content.
Claims
1. A flue gas waste heat recovery device, comprising a condenser (1), a liquid storage tank (4), an expansion valve (6), a flue (7), a gas-liquid separator (8) and a compressor (10), characterized in that: The output port (2) of the condenser (1) is connected to the input end of the liquid storage tank (4) through a liquid pipe (3); the output end of the liquid storage tank (4) is connected to the input end of the expansion valve (6), and the output end of the expansion valve (6) is connected to a heat absorption pipe (15) provided in the flue (7); the output end of the heat absorption pipe (15) is connected to the input end of the gas-liquid separator (8) through an air pipe (14), the output end of the gas-liquid separator (8) is connected to the input end of the compressor (10), and the output end of the compressor (10) is connected to the input port (11) of the condenser (1); the gas-liquid separator (8) and the compressor (10) are controlled by an external control box (16).
2. A flue gas waste heat recovery device according to claim 1, characterized in that: The output end of the liquid storage tank (4) is connected to a first filter (5), and the output end of the first filter (5) is connected to the input end of the expansion valve (6) through a pipeline.
3. A flue gas waste heat recovery device according to claim 2, characterized in that: A temperature sensor is provided at any position between the first filter (5) and the heat absorbing pipe (15).
4. The flue gas waste heat recovery device according to claim 1, characterized in that: A pressure sensor is provided between the output end of the compressor (10) and the input port (11) of the condenser (1).
5. The flue gas waste heat recovery device according to claim 1, characterized in that: A heat conducting plate (12) is provided on the outer side of the heat absorbing pipe (15), the heat absorbing pipe (15) penetrates the heat conducting plate (12), the heat absorbing pipe (15) is distributed in a U shape inside the heat conducting plate (12), and a temperature sensor is provided on the heat absorbing pipe (15).
6. The flue gas waste heat recovery device according to claim 1, characterized in that: A plurality of the heat absorbing pipes (15) are arranged in the flue (7), and the plurality of the heat absorbing pipes (15) are connected in parallel.
7. The flue gas waste heat recovery device according to claim 1, characterized in that: The input end of the heat absorbing tube (15) is provided with a liquid separation head (13), and the liquid separation head (13) is connected to the input end of the heat absorbing tube (15).
8. The flue gas waste heat recovery device according to claim 1, characterized in that: A second filter (9) is provided between the output end of the gas-liquid separator (8) and the input end of the compressor (10).
9. A flue gas waste heat recovery device according to any one of claims 1 and 8, characterized in that: A pressure sensor is provided at any position of the output end of the second filter (9) and the input end of the compressor (10).
Citation Information
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