Low-grade waste heat ORC power generation system

Abstract

The utility model relates to the technical field of waste heat power generation, disclose a kind of low-grade waste heat ORC power generation system, comprising: heat source, heat source is low-grade waste heat wastewater;Filtering structure, filtering structure includes first filter part and second filter part, first filter part includes the liquid filter tank of being set to the outside of heat source, and the outer wall of liquid filter tank is fixedly installed with discharge pipe;Second filter part includes the gas purification tank of being set to the outside of heat source, and the outside of gas purification tank is provided with waste gas tank, and fixedly installed with exhaust pipe between gas purification tank and waste gas tank, the outside of heat source is provided with three groups of pipelines, and the outer wall of three groups of pipelines is respectively provided with a group of liquid transfer valve, a group of gas transfer valve and a group of circulation valve, and connecting pipeline is arranged between liquid transfer valve and liquid filter tank, reach the purpose of self-filtering to power generation system, impurity and waste gas in heat source are filtered and purified, improve the quality of heat source, reduce the condition that heat source blocks pipeline, improve the durability of power generation system.

Description

Technical Field

[0001] This utility model belongs to the field of waste heat power generation technology, specifically, it relates to a low-grade waste heat ORC power generation system. Background Technology

[0002] Industrial production processes generate a large amount of low-grade waste heat with relatively low temperatures, such as the heat carried by high-temperature flue gas and cooling water in industries like steel, chemicals, and building materials. This low-grade waste heat, due to its low temperature and poor energy quality, is difficult to effectively recover and utilize using conventional power generation technologies and is often directly released into the environment, causing not only a huge waste of energy but also some thermal pollution.

[0003] Utility model CN213063694U discloses a waste heat recovery power generation system for cogeneration. The system includes a heat source, valves I, II, and III, a screw expander, a generator, a condenser, a working fluid circulation pump, a preheater, an evaporator, a heating system, cooling pump II, radiator II, cooling pump I, and radiator I. The heat source is an engine. Valves I, II, and III are connected in series in the cylinder liner hot water circulation pipeline of the cogeneration engine unit. The inlet of valve I and one outlet of valve III are connected to the cylinder liner hot water outlet and inlet of the cogeneration engine unit, respectively. This utility model integrates cogeneration with a mature ORC (Organic Rankine Cycle) power generation system, further recovering and utilizing waste heat from the circulating hot water in the engine cylinder liner. It also boasts superior variable operating condition capabilities, improving the efficiency and flexibility of cogeneration. It can utilize engine waste heat to achieve low-grade thermal energy power generation, improving engine efficiency, saving energy and protecting the environment, and meeting grid service requirements.

[0004] However, the above-mentioned patent still has the following problems: during the ORC power generation process of low-grade waste heat, there will be impurities in the heat source, which will block the device during the transportation process and affect the normal operation of the device. The above-mentioned power generation system does not have a filter structure, so it cannot filter and clean the impurities in the heat source, which makes the device inconvenient to use.

[0005] In view of this, this utility model is proposed. Utility Model Content

[0006] To solve the aforementioned technical problem of inconvenient filtration of impurities in heat sources, the basic concept of the technical solution adopted by this utility model is as follows: A low-grade waste heat ORC power generation system includes: The heat source is low-grade wastewater with residual heat. The filtration structure includes a first filtration section and a second filtration section. The first filtration section includes a liquid filter tank located outside the heat source, and a slag discharge pipe is fixedly installed on the outer wall of the liquid filter tank. The second filtration section includes a gas purification tank located outside the heat source, and an exhaust gas tank is located outside the gas purification tank. An exhaust pipe is fixedly installed between the gas purification tank and the exhaust gas tank.

[0007] In a preferred embodiment of this utility model, the heat source is provided with three sets of pipes. Each of the three sets of pipes has a set of liquid infusion valves, a set of gas infusion valves, and a set of circulation valves on its outer wall. A connecting pipe is provided between the liquid infusion valves and the liquid filter tank, and a connecting pipe is provided between the gas infusion valves and the gas purification tank.

[0008] In a preferred embodiment of this utility model, a temperature sensor is installed inside the output pipe of the liquid filter tank. A set of first inlet valves and a set of second inlet valves are installed on the outer wall of the temperature sensor. A liquid storage tank is installed outside the first inlet valve. A pipe is fixedly installed between the first inlet valve and the liquid storage tank. The second inlet valve is fixedly connected to an external preheater. A pipe is fixedly installed between the preheater and the liquid storage tank.

[0009] In a preferred embodiment of this utility model, an evaporator and a screw expander are provided outside the liquid storage tank, a generator is provided outside the screw expander, a pipe is fixedly installed between the liquid storage tank and the evaporator, and a pipe is fixedly installed between the evaporator and the screw expander.

[0010] In a preferred embodiment of the present invention, a first condenser is provided on the outside of the screw expander, a pipe is fixedly installed between the screw expander and the first condenser, a first cooling pump is provided on the output pipe of the first condenser, and a first radiator is fixedly connected to the output pipe of the first condenser.

[0011] In a preferred embodiment of this utility model, a second cooling pump is provided on the gas delivery pipe of the gas purification tank, and the second cooling pump is connected to a second radiator.

[0012] In a preferred embodiment of this utility model, a heating system is provided outside the heat source, and two sets of one-way pipes are fixedly installed between the circulation valve and the heating system.

[0013] Compared with the prior art, the present invention has the following advantages: 1. To achieve the purpose of self-filtration of the power generation system, filter and purify impurities and exhaust gas in the heat source, improve the quality of the heat source, reduce the situation of heat source clogging the pipes, and improve the durability of the power generation system.

[0014] 2. To achieve the goal of recovering waste heat from gases and liquids for power generation, simplify the operation of the power generation system, improve the convenience of using the power generation system, and reduce the workload of workers.

[0015] 3. Circulate the heat source to reduce waste heat loss, improve the waste heat utilization efficiency of the power generation system, and optimize the user experience of the device.

[0016] The specific embodiments of this utility model will be described in further detail below with reference to the accompanying drawings. Attached Figure Description

[0017] In the attached diagram: Figure 1 This is an overall structural diagram of the present invention; Figure 2 This is a schematic diagram of the gas-liquid separation of this utility model; Figure 3 This is a schematic diagram of the liquid supply system of this utility model; Figure 4 This is a schematic diagram of the gas supply system of this utility model; Figure 5 This is a schematic diagram of the heating system of this utility model.

[0018] In the diagram: 10. Heat source; 11. Liquid inlet valve; 12. Gas inlet valve; 13. Circulation valve; 14. Liquid filter tank; 15. Temperature sensor; 16. First water inlet valve; 17. Liquid storage tank; 18. Evaporator; 19. Screw expander; 20. Generator; 21. First condenser; 22. First cooling pump; 23. First radiator; 24. Second water inlet valve; 25. Preheater; 26. Gas purification tank; 27. Second cooling pump; 28. Second radiator; 29. ​​Waste gas tank; 30. Heating system. Detailed Implementation

[0019] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions in the embodiments will be clearly and completely described below with reference to the accompanying drawings. The following embodiments are used to illustrate this utility model.

[0020] Example 1: A low-grade waste heat ORC power generation system, specifically as follows: Figure 1 , Figure 3 and Figure 4As shown, the system includes a heat source 10, which is low-grade waste heat wastewater; a filtration structure, comprising a first filtration section and a second filtration section. The first filtration section includes a liquid filter tank 14 disposed outside the heat source 10, with a slag discharge pipe fixedly installed on the outer wall of the liquid filter tank 14; the second filtration section includes a gas purification tank 26 disposed outside the heat source 10, with an exhaust gas tank 29 disposed outside the gas purification tank 26, and an exhaust pipe fixedly installed between the gas purification tank 26 and the exhaust gas tank 29. The liquid is filtered through the liquid filter tank 14, the gas is filtered through the gas purification tank 26, and the exhaust gas is collected through the exhaust gas tank 29.

[0021] Based on the above, the structure of the heat source 10, liquid filter tank 14, gas purification tank 26, and waste gas tank 29 achieves the purpose of self-filtration of the power generation system, filters and purifies impurities and waste gas in the heat source, improves the quality of the heat source, reduces the situation of heat source clogging the pipes, and improves the durability of the power generation system.

[0022] Example 2: Based on Example 1, specifically as follows... Figure 1 , Figure 2 , Figure 3 and Figure 4 As shown, the heat source 10 has three sets of pipes on its exterior. Each set of pipes has a liquid inlet valve 11, a gas inlet valve 12, and a circulation valve 13 installed on its outer wall. A connecting pipe connects the liquid inlet valve 11 to the liquid filter tank 14, and a connecting pipe connects the gas inlet valve 12 to the gas purification tank 26. Opening the liquid inlet valve 11 delivers liquid to the liquid filter tank 14, and opening the gas inlet valve 12 delivers gas to the gas purification tank 26.

[0023] Specifically, such as Figure 1 and Figure 3 As shown, a temperature sensor 15 is installed inside the output pipe of the liquid filter tank 14. A first inlet valve 16 and a second inlet valve 24 are installed on the outer wall of the temperature sensor 15. A storage tank 17 is installed outside the first inlet valve 16. A pipe is fixedly installed between the first inlet valve 16 and the storage tank 17. The second inlet valve 24 is fixedly connected to an external preheater 25. A pipe is fixedly installed between the preheater 25 and the storage tank 17. The temperature sensor 15 detects the liquid temperature. When the temperature reaches the recovery value, the first inlet valve 16 is opened, and the liquid is delivered to the storage tank 17. When the temperature does not reach the recovery value, the second inlet valve 24 is opened, and the liquid is delivered to the preheater 25 for heating. The heated liquid is then delivered to the storage tank 17.

[0024] Specifically, such as Figure 1 and Figure 3As shown, an evaporator 18 and a screw expander 19 are installed outside the liquid storage tank 17. A generator 20 is installed outside the screw expander 19. Pipes are fixedly installed between the liquid storage tank 17 and the evaporator 18, and between the evaporator 18 and the screw expander 19. The liquid is evaporated by the evaporator 18, releasing the heat energy of the liquid. The screw expander 19 converts the heat energy into electrical energy, which is then output as electrical energy by the generator 20.

[0025] Specifically, such as Figure 1 and Figure 3 As shown, a first condenser 21 is externally mounted on the screw expander 19. A pipe is fixedly installed between the screw expander 19 and the first condenser 21. A first cooling pump 22 is installed on the output pipe of the first condenser 21, and a first radiator 23 is fixedly connected to the output pipe of the first condenser 21. The screw expander 19 is condensed through the first condenser 21, and the first cooling pump 22 is turned on to dissipate heat through the first radiator 23.

[0026] Specifically, such as Figure 1 and Figure 4 As shown, a second cooling pump 27 is installed on the gas delivery pipe of the gas purification tank 26, and the second cooling pump 27 is connected to the second radiator 28. When the second cooling pump 27 is turned on, heat is dissipated through the second radiator 28.

[0027] Based on the above, the structure of heat source 10, liquid inlet valve 11, gas inlet valve 12, circulation valve 13, temperature sensor 15, first water inlet valve 16, liquid storage tank 17, evaporator 18, screw expander 19, generator 20, first condenser 21, first cooling pump 22, first radiator 23, second water inlet valve 24, preheater 25, second cooling pump 27, and second radiator 28 achieves the purpose of recovering waste heat from gas and liquid for power generation, simplifies the operation steps of the power generation system, improves the convenience of using the power generation system, and reduces the workload of workers.

[0028] Example 3: Based on Examples 1 and 2, specifically as follows... Figure 1 and Figure 5 As shown, a heating system 30 is installed outside the heat source 10, and two sets of one-way pipes are fixedly installed between the circulation valve 13 and the heating system 30. When the circulation valve 13 is opened, the heat source is delivered to the interior of the heating system 30, so that the heat source circulates within the heat source 10 and the heating system 30.

[0029] In summary, the structure of heat source 10, circulation valve 13 and heating system 30 enables the circulation and transportation of heat source, reduces waste heat loss of heat source, improves waste heat utilization efficiency of power generation system, and optimizes user experience of device.

[0030] Working principle: The heat source 10 is low-grade waste heat water, and it is equipped with an external filtration structure, including a first filtration section (liquid filter tank 14 is outside the heat source 10, with a slag discharge pipe on the outer wall) and a second filtration section (gas purification tank 26 is outside the heat source 10, with an exhaust gas tank 29 on the outside, and an exhaust pipe between the two). There are three sets of pipes outside the heat source 10, namely a liquid delivery valve 11, a gas delivery valve 12, and a circulation valve 13. There are connecting pipes between the liquid delivery valve 11 and the liquid filter tank 14, and between the gas delivery valve 12 and the gas purification tank 26. Opening the liquid delivery valve 11 delivers liquid to the liquid filter tank 14 for filtration, opening the gas delivery valve 12 delivers gas to the gas purification tank 26 for filtration, and the exhaust gas tank 29 collects the exhaust gas. The liquid filter tank 14 has a temperature sensor 15 in its output pipe, and its outer wall has a first water inlet valve 16 and a second water inlet valve 24. A first inlet valve 16 is connected to a storage tank 17 via a pipe. A second inlet valve 24 is fixedly connected to an external preheater 25, which is also connected to the storage tank 17 via a pipe. A temperature sensor 15 detects the liquid temperature. When the temperature reaches the recovery value, the first inlet valve 16 is opened to send the liquid to the storage tank 17. When the temperature does not reach the recovery value, the second inlet valve 24 is opened to send the liquid to the preheater 25 for heating before sending it to the storage tank 17. An evaporator 18 and a screw expander 19 are located outside the storage tank 17. A generator 20 is located outside the screw expander 19. Pipes connect the storage tank 17 to the evaporator 18 and the evaporator 18 to the screw expander 19. The evaporator 18 evaporates the liquid, releasing heat energy. The screw expander 19 converts the heat energy into electrical energy, which is then output by the generator 20. A first condenser 21 is located outside the screw expander 19, connected to the storage tank 19 via a pipe. A first cooling pump 22 is located on the output pipe of the first condenser 21 and is fixedly connected to a first radiator 23. The first condenser 21 condenses the screw expander 19. The first cooling pump 22 is turned on, dissipating heat through the first radiator 23. A second cooling pump 27 is connected to the second radiator 28 via the gas purification tank 26's gas delivery pipe. The second cooling pump 27 is turned on, dissipating heat through the second radiator 28. A heating system 30 is located outside the heat source 10. Two sets of one-way pipes connect the circulation valve 13 to the heating system 30. Opening the circulation valve 13 delivers the heat source to the heating system 30, allowing the heat source to circulate within both the heat source 10 and the heating system 30.

[0031] It is understood that this utility model has been described through some embodiments, and those skilled in the art will recognize that various changes or equivalent substitutions can be made to these features and embodiments without departing from the spirit and scope of this utility model. Furthermore, under the teachings of this utility model, these features and embodiments can be modified to adapt to specific situations and materials without departing from the spirit and scope of this utility model. Therefore, this utility model is not limited to the specific embodiments disclosed herein, and all embodiments falling within the scope of the claims of this application are within the protection scope of this utility model.

Claims

1. A low-grade waste heat ORC power generation system, characterized in that, include: Heat source (10), heat source (10) is low-grade waste heat wastewater; The filter structure includes a first filter section and a second filter section. The first filter section includes a liquid filter tank (14) located outside the heat source (10), and a slag discharge pipe is fixedly installed on the outer wall of the liquid filter tank (14). The second filter section includes a gas purification tank (26) located outside the heat source (10), and an exhaust gas tank (29) is located outside the gas purification tank (26). An exhaust pipe is fixedly installed between the gas purification tank (26) and the exhaust gas tank (29).

2. The low-grade waste heat ORC power generation system according to claim 1, characterized in that, The heat source (10) is provided with three sets of pipes on its exterior. On the outer wall of the three sets of pipes, there is a set of liquid infusion valve (11), a set of gas infusion valve (12) and a set of circulation valve (13). A connecting pipe is provided between the liquid infusion valve (11) and the liquid filter tank (14), and a connecting pipe is provided between the gas infusion valve (12) and the gas purification tank (26).

3. The low-grade waste heat ORC power generation system according to claim 1, characterized in that, A temperature sensor (15) is installed inside the output pipe of the liquid filter tank (14). A set of first inlet valves (16) and a set of second inlet valves (24) are installed on the outer wall of the temperature sensor (15). A storage tank (17) is installed outside the first inlet valve (16). A pipe is fixedly installed between the first inlet valve (16) and the storage tank (17). The second inlet valve (24) is fixedly connected to an external preheater (25). A pipe is fixedly installed between the preheater (25) and the storage tank (17).

4. The low-grade waste heat ORC power generation system according to claim 3, characterized in that, An evaporator (18) and a screw expander (19) are provided on the outside of the liquid storage tank (17). A generator (20) is provided on the outside of the screw expander (19). A pipe is fixedly installed between the liquid storage tank (17) and the evaporator (18). A pipe is fixedly installed between the evaporator (18) and the screw expander (19).

5. The low-grade waste heat ORC power generation system according to claim 4, characterized in that, The screw expander (19) is provided with a first condenser (21) on its exterior. A pipe is fixedly installed between the screw expander (19) and the first condenser (21). A first cooling pump (22) is provided on the output pipe of the first condenser (21). A first radiator (23) is fixedly connected to the output pipe of the first condenser (21).

6. The low-grade waste heat ORC power generation system according to claim 1, characterized in that, The gas purification tank (26) is equipped with a second cooling pump (27) on its gas delivery pipe, and the second cooling pump (27) is connected to the second radiator (28).

7. The low-grade waste heat ORC power generation system according to claim 1, characterized in that, A heating system (30) is provided outside the heat source (10), and two sets of one-way pipes are fixedly installed between the circulation valve (13) and the heating system (30).

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