Multi-purpose ORC pure low temperature waste heat power generation equipment testing bench

Abstract

The present invention relates to the technical field of low-temperature waste heat power generation, and specifically to a multi-purpose ORC pure low-temperature waste heat power generation equipment detection test bench. The multi-purpose ORC pure low-temperature waste heat power generation equipment detection test bench provided by the present invention is a detection test bench established for the first time in China that can conduct heat load tests on various types of low-temperature waste heat power generation equipment in a factory. The present invention utilizes steam to simulate the waste heat source, including a steam pipeline network, a heat exchange device and a high-temperature water circulation system established in the factory. The test bench has two sets of high-temperature water circulation networks, which can test two low-temperature waste heat power generation equipment at the same time. The test bench also includes an automatic control system, various sensors and detection components, which control the steam supply by real-time detection of the flow rate or temperature of the steam pipeline network and the high-temperature water circulation network, thereby providing a stable heat source for the pure low-temperature waste heat power generation equipment to generate electricity, and thereby detecting the total power generation power and type test of the low-temperature waste heat power generation.

Description

Technical Field

[0001] The present invention relates to the technical field of low-temperature waste heat power generation, in particular to a multi-purpose ORC pure low-temperature waste heat power generation equipment detection test bench. Background Art

[0002] ORC is the abbreviation of Organic Rankine Cycle, which uses low-boiling-point organic matter as the working fluid. It mainly consists of four major parts: waste heat boiler (or heat exchanger), turbine, condenser and working fluid pump. The organic working fluid absorbs heat from the waste heat flow in the heat exchanger to generate steam with a certain pressure and temperature. The steam enters the turbine and expands to do work, thereby driving the generator or dragging other power machinery. The steam discharged from the turbine releases heat to the cooling water in the condenser, condenses into liquid, and finally returns to the heat exchanger with the help of the working fluid pump, and the cycle continues.

[0003] In order to ensure the performance of pure low-temperature waste heat power generation equipment before leaving the factory, special testing equipment is needed to test the performance and power of pure low-temperature waste heat power generation equipment. Currently, there are few such special testing equipment, and the test efficiency of most testing equipment is not high. Therefore, it is necessary to develop a test bench for testing a variety of pure low-temperature waste heat power generation equipment. Summary of the Invention

[0004] In view of the shortcomings of the existing technology, the purpose of the present invention is to provide a multi-purpose ORC pure low-temperature waste heat power generation equipment detection test bench to solve the problems in the background technology that the existing detection equipment is limited in variety and most of them have low detection efficiency.

[0005] The technical solution of the present invention for achieving the above-mentioned purpose is a multi-purpose ORC pure low-temperature waste heat power generation equipment detection test bench.

[0006] A multi-purpose ORC pure low-temperature waste heat power generation equipment detection test bench manufactured using the technical solution of the present invention includes a test bench body for detecting the power generation power of the pure low-temperature waste heat power generation equipment, the test bench body includes a high-temperature water circulation system and a heat exchange device for heat exchanging the circulating water in the high-temperature water circulation system, the high-temperature water circulation system includes two high-temperature water circulation networks respectively connected to two pure low-temperature waste heat power generation equipment, the test bench body also includes a steam pipe network for transporting steam to the heat exchange device, the heat exchange device includes a primary heat exchange mechanism for preheating the circulating water and a secondary heat exchange mechanism for further heating the preheated circulating water, the circulating water heated by the heat exchange device flows back into the high-temperature water circulation system after being used for power generation by the pure low-temperature waste heat power generation equipment; the test bench body also includes a detection component, which realizes the detection of the power generation power of the pure low-temperature waste heat power generation equipment by measuring the flow or temperature of the steam pipe network and the high-temperature water circulation network.

[0007] The high-temperature water circulation network includes a water supply pipeline, a return pipeline and a heat exchange pipeline. One end of the heat exchange pipeline is connected to the return pipeline, and the other end of the heat exchange pipeline is connected to the water supply pipeline. The end of the water supply pipeline away from the heat exchange pipeline and the end of the return pipeline away from the heat exchange pipeline are respectively connected to the pure low-temperature waste heat power generation equipment. The circulating water flows in the high-temperature water circulation network in the order of the heat exchange pipeline, the water supply pipeline, the pure low-temperature waste heat power generation equipment, and the return pipeline; the high-temperature water circulation network exchanges heat with the heat exchange device through the heat exchange pipeline and the return pipeline. The circulating water flows in the heat exchange pipeline along the first-level heat exchange mechanism toward the second-level heat exchange mechanism, and the steam flows in the steam pipeline network along the second-level heat exchange mechanism toward the first-level heat exchange mechanism.

[0008] The water supply pipeline is also provided with a water pump for conveying the circulating water heated by the heat exchange device to the pure low-temperature waste heat power generation equipment; the detection component includes a thermometer and a circulating water flow meter, the thermometer is arranged on the water supply pipeline close to the end of the circulating water flowing out of the secondary heat exchange mechanism, and the circulating water flow meter is arranged on the heat exchange pipeline at the end of the secondary heat exchange mechanism away from the primary heat exchange mechanism, and the circulating water flow meter is used to detect the circulating water flow; the high-temperature water circulation system also includes a high-temperature water pressure regulating tank and a warm water pressure regulating tank, the high-temperature water pressure regulating tank is connected to the water supply pipeline, the warm water pressure regulating tank is connected to the return water pipeline, the high-temperature water pressure regulating tank and the water supply pipeline are connected through a high-temperature water intermediate tank, and the warm water pressure regulating tank and the return water pipeline are connected through a warm water intermediate tank.

[0009] The two high-temperature water circulation networks are connected to a water collector at the position of the return water pipeline, and the water collector is connected to a return water main pipe. The return water main pipe is connected to a water distributor at one end away from the water collector. The return water main pipe is connected to the heat exchange pipes in the two circulation pipelines through the water distributor.

[0010] The steam pipe network includes a steam delivery main pipe and two steam delivery manifolds, and a gas distribution cylinder and a gas collecting cylinder are arranged between the steam delivery main pipe and the steam delivery manifolds. The two ends of the two steam delivery manifolds are connected to the steam delivery main pipe through the gas distribution cylinder and the gas collecting cylinder respectively; the detection component also includes a steam flow meter, and the steam flow meter and steam valve are arranged at one end of the steam delivery main pipe close to the gas distribution cylinder.

[0011] The first-level heat exchange mechanism is arranged on the steam delivery main pipe to enable the steam delivery main pipe to exchange heat with the return water main pipe. The first-level heat exchange mechanism includes a heat exchange tube arranged in the steam delivery main pipe. The heat exchange tube is arranged along the axial direction of the steam delivery main pipe and spirally arranged around the axis of the steam delivery main pipe. Both ends of the heat exchange tube pass through the side wall of the steam delivery main pipe. The return water main pipe includes a front section tube connected to the water collector and a rear section tube connected to the water distributor. The two ends of the heat exchange tube are respectively connected to the front section tube and the rear section tube.

[0012] There are two secondary heat exchange mechanisms, which are respectively arranged on the two steam delivery manifolds so that the two steam delivery manifolds can respectively exchange heat with the two heat exchange pipes. The secondary heat exchange mechanism includes a booster heat exchange cylinder, a heat exchange chamber is provided in the booster heat exchange cylinder, and a heat exchange plate is obliquely arranged in the heat exchange chamber. The side of the heat exchange plate is sealed and connected to the heat exchange chamber so that the heat exchange chamber is divided into a high-pressure chamber for circulating water and a low-pressure chamber for steam circulation. The upper end of the heat exchange plate is inclined toward the side of the high-pressure chamber.

[0013] The heat exchange pipeline includes a front heat exchange pipe connected to the water distributor and a rear heat exchange pipe connected to the water supply pipeline. The high-pressure chamber is connected to the front heat exchange pipe and the rear heat exchange pipe. The connection between the rear heat exchange pipe and the high-pressure chamber is located below the heat exchange plate. An atomizing nozzle facing the heat exchange plate is also provided at one end of the front heat exchange pipe connected to the high-pressure chamber; a first booster pump is provided on the front heat exchange pipe, and a second booster pump is provided on the rear heat exchange pipe; the steam delivery manifold includes a front manifold connected to the gas distribution cylinder and a rear manifold connected to the gas collecting cylinder. The front manifold is arranged below the heat exchange plate, and the rear manifold is arranged above the heat exchange plate. A steam valve for changing the steam flow rate is also provided on the front manifold.

[0014] The low-pressure chamber is further provided with a water pipe, one end of which is connected to the lower edge of the heat exchange plate, and the other end of which is connected to a water collecting tank.

[0015] An isolation plug is further provided at one end of the water pipe communicating with the low-pressure chamber. The isolation plug is provided with a plurality of through holes. The through holes include a first bend and a second bend. The second bend is located above the first bend.

[0016] By adopting the above technical solution, the present invention has the following beneficial effects:

[0017] In this solution, by setting up two high-temperature water circulation networks, the multi-purpose ORC pure low-temperature waste heat power generation equipment test bench can simultaneously test two pure low-temperature waste heat power generation equipment, greatly improving testing efficiency. Simultaneously, by adjusting the steam supply in the steam pipe network via a steam valve, the temperature of the circulating water flowing into the pure low-temperature waste heat power generation equipment is changed, making the multi-purpose ORC pure low-temperature waste heat power generation equipment test bench suitable for testing pure low-temperature waste heat power generation equipment of various power outputs, thereby expanding the multi-purpose ORC pure low-temperature waste heat power generation equipment test bench's applicability. The circulating water in the high-temperature water circulation network is secondary heated by steam through the primary and secondary heat exchange mechanisms, optimizing the heat exchange effect between the steam and the circulating water. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 This is a schematic diagram of the pipeline connection structure of the multi-purpose ORC pure low-temperature waste heat power generation equipment test bench of the present invention;

[0019] Figure 2 This is a partial structural diagram of the multi-purpose ORC pure low-temperature waste heat power generation equipment test bench of the present invention;

[0020] Figure 3 This is a partial structural diagram of the multi-purpose ORC pure low-temperature waste heat power generation equipment test bench of the present invention;

[0021] Figure 4 This is a partial structural diagram of the multi-purpose ORC pure low-temperature waste heat power generation equipment test bench of the present invention;

[0022] Figure 5 It is a partial enlarged view of the multi-purpose ORC pure low-temperature waste heat power generation equipment test bench of the present invention.

[0023] In the figure, 1. high-temperature water circulation system; 2. heat exchange device; 3. steam pipe network; 4. primary heat exchange mechanism; 5. secondary heat exchange mechanism; 6. high-temperature water circulation network; 7. water supply pipeline; 8. return pipeline; 9. heat exchange pipeline; 10. water pump; 11. thermometer; 12. circulating water flow meter; 13. high-temperature water pressure regulating tank; 14. warm water pressure regulating tank; 15. high-temperature water intermediate tank; 16. warm water intermediate tank; 17. water collector; 18. return water main; 19. water distributor; 20. steam delivery main; 21. steam delivery manifold; 22. sub-cylinder; 23. collector Cylinder; 24. Steam flowmeter; 25. Steam valve; 26. Heat exchange tube; 27. Front section tube; 28. Rear section tube; 29. ​​Booster heat exchange cylinder; 30. Heat exchange chamber; 31. Heat exchange plate; 32. High-pressure chamber; 33. Low-pressure chamber; 34. Heat exchange front tube; 35. Heat exchange rear tube; 36. Atomizing nozzle; 37. First booster pump; 38. Second booster pump; 39. Front manifold; 40. Rear manifold; 41. Water guide pipe; 42. Water collecting tank; 43. Isolation plug; 44. Through hole; 45. First bend; 46. Second bend; 47. Pure low-temperature waste heat power generation equipment. DETAILED DESCRIPTION

[0024] The present invention will be described in further detail below with reference to the accompanying drawings and embodiments. Identical components are denoted by the same reference numerals. It should be noted that the terms "front," "rear," "left," "right," "upper," and "lower" used in the following description refer to directions in the accompanying drawings, while the terms "bottom," "top," "inner," and "outer" refer to directions toward or away from the geometric center of a particular component, respectively.

[0025] like Figures 1 to 5 As shown, the multi-purpose ORC pure low-temperature waste heat power generation equipment detection test bench includes a test bench body for detecting the power generation power of the pure low-temperature waste heat power generation equipment 47, and the test bench body includes a high-temperature water circulation system 1 and a heat exchange device 2 for heat exchange of circulating water in the high-temperature water circulation system 1.

[0026] Refer to the attached Figures 1 to 5As shown, the high-temperature water circulation system 1 includes two high-temperature water circulation networks 6 respectively connected to two pure low-temperature waste heat power generation equipment 47. The test bench body also includes a steam pipe network 3 for conveying steam to the heat exchange device 2. The heat exchange device 2 includes a primary heat exchange mechanism 4 for preheating the circulating water and a secondary heat exchange mechanism 5 for further heating the preheated circulating water. The circulating water heated by the heat exchange device 2 is used for generating electricity by the pure low-temperature waste heat power generation equipment 47 and then flows into the high-temperature water circulation system 1 again; the test bench body also includes a detection component, which measures the flow rate or temperature of the steam pipe network 3 and the high-temperature water circulation network 6 to detect the power generation power of the pure low-temperature waste heat power generation equipment 47. In this solution, the steam in the steam pipe network 3 comes from the steam pipe network in Hangzhou City. The steam in the steam pipe network 3 exchanges heat with the high-temperature water circulation system 1 in the test bench body through the heat exchange device 2. The circulating water in the high-temperature water circulation system 1 is in a low-temperature state and is first preheated by the first-level heat exchange mechanism 4 to be heated to medium-temperature circulating water. The temperature range of the medium-temperature circulating water is approximately 60°C-70°C. The medium-temperature circulating water continues to flow in the circulation pipeline to the pure low-temperature waste heat power generation equipment 47. When passing through the second-level heat exchange mechanism 5, the steam in the steam pipe network 3 further heats the medium-temperature circulating water in the circulation pipeline through the second-level heat exchange mechanism 5, so that the medium-temperature circulating water is heated to high-temperature circulating water of 130°C-150°C. The high-temperature circulating water flows into one end of the pure low-temperature waste heat power generation equipment 47 through the circulation pipeline, and becomes low-temperature circulating water again after being used for power generation. The low-temperature circulating water flows into the circulation pipeline from the other end of the pure low-temperature waste heat power generation equipment 47 and undergoes the next heat exchange with the steam pipe network 3 through the heat exchange device 2. The provision of two high-temperature water circulation networks 6 enables the test bench to simultaneously test two pure low-temperature waste heat power generation equipment 47, greatly improving the testing efficiency of the multi-purpose ORC pure low-temperature waste heat power generation equipment testing bench.

[0027] Refer to the attached Figures 1 to 4As shown, the high-temperature water circulation network 6 includes a water supply pipe 7, a return water pipe 8 and a heat exchange pipe 9. One end of the heat exchange pipe 9 is connected to the return water pipe 8, and the other end of the heat exchange pipe 9 is connected to the water supply pipe 7. The end of the water supply pipe 7 away from the heat exchange pipe 9 and the end of the return water pipe 8 away from the heat exchange pipe 9 are respectively connected to the pure low-temperature waste heat power generation equipment 47. The circulating water flows in the high-temperature water circulation network 6 in the order of the heat exchange pipe 9, the water supply pipe 7, the pure low-temperature waste heat power generation equipment 47, and the return water pipe 8; the high-temperature water circulation network 6 exchanges heat with the heat exchange device 2 through the heat exchange pipe 9 and the return water pipe 8. The circulating water flows in the heat exchange pipe 9 along the primary heat exchange mechanism 4 toward the secondary heat exchange mechanism 5, and the steam flows in the steam pipe network 3 along the secondary heat exchange mechanism 5 toward the primary heat exchange mechanism 4. The low-temperature circulating water flowing out of the pure low-temperature waste heat power generation equipment 47 is preheated in the return water pipeline 8 by the first-level heat exchange mechanism 4 in the heat exchange device 2 and then heated to medium-temperature circulating water and flows into the heat exchange pipeline 9. It is heated for the second time by the second-level heat exchange mechanism 5 in the heat exchange device 2 and then heated to high-temperature circulating water and flows into the water supply pipeline 7. Then, it flows into the pure low-temperature waste heat power generation equipment 47 through the water supply pipeline 7 to generate electricity. After being used for power generation by the pure low-temperature waste heat power generation equipment 47, the high-temperature circulating water is cooled to become low-temperature circulating water and flows into the return water pipeline 8 again.

[0028] Refer to the attached Figure 1 、 34, the water supply pipeline 7 is also provided with a water pump 10 for conveying the circulating water heated by the heat exchange device 2 to the pure low-temperature waste heat power generation equipment 47; the detection component includes a thermometer 11 and a circulating water flow meter 12, the thermometer 11 is arranged on the water supply pipeline 7 near the end of the circulating water outflowing from the secondary heat exchange mechanism 5, and the circulating water flow meter 12 is arranged on the heat exchange pipeline 9 at the end of the secondary heat exchange mechanism 5 away from the primary heat exchange mechanism 4, and the circulating water flow meter 12 is used to detect the circulating water flow; the high-temperature water circulation system 1 also includes a high-temperature water pressure regulating tank 13 and a warm water pressure regulating tank 14, the high-temperature water pressure regulating tank 13 is connected to the water supply pipeline 7, the warm water pressure regulating tank 14 is connected to the return water pipeline 8, the high-temperature water pressure regulating tank 13 and the water supply pipeline 7 are connected through a high-temperature water intermediate tank 15, and the warm water pressure regulating tank 14 and the return water pipeline 8 are connected through a warm water intermediate tank 16. Both the high-temperature water pressure stabilizing tank 13 and the warm water pressure stabilizing tank 14 can be diaphragm-type air pressure tanks, and the model of the diaphragm-type air pressure tank can be SQL-2000; the circulating water flow meter 12 can be a turbine flow meter, and the model can be LWQ-250; the thermometer 11 can be a DT-613 thermometer; the warm water intermediate tank 16 and the high-temperature water intermediate tank 15 can be water storage tanks with insulation function and capable of withstanding 5 atmospheres of pressure. The provision of the thermometer 11 enables the operator to monitor the temperature of the circulating water after being heated by the heat exchanger 2, and to use this as one of the bases for adjusting the steam supply from the steam pipe network 3 to the heat exchanger 2. The provision of the circulating water flowmeter 12 enables the operator to monitor the real-time flow rate of the circulating water in the high-temperature water circulation network 6. The provision of the high-temperature water pressure-surge tank 13 and the warm water pressure-surge tank 14 allows the operator to receive the circulating water that has expanded due to heat in the high-temperature water circulation network 6. After the circulating water cools down, the high-temperature water pressure-surge tank 13 and the warm water pressure-surge tank 14 can re-extract the previously received circulating water due to heat into the high-temperature water circulation network 6. The warm water intermediate tank 16 and the high-temperature water intermediate tank 15 serve as a transitional transport for the expanded circulating water between the high-temperature water pressure-surge tank 13 and the warm water pressure-surge tank 14 and the high-temperature water circulation network 6, effectively reducing the pressure of the high-temperature water pressure-surge tank 13 and the warm water pressure-surge tank 14 receiving the expanded circulating water, thereby reducing the possibility of overloading the high-temperature water pressure-surge tank 13 and the warm water pressure-surge tank 14.

[0029] Refer to the attached Figure 1As shown, the two high-temperature water circulation networks 6 are connected to a water collector 17 at the return water pipeline 8. A return water main pipe 18 is connected to the water collector 17. The end of the return water main pipe 18, away from the water collector 17, is also connected to a water distributor 19. The return water main pipe 18 is connected to the heat exchange pipes 9 in the two circulation pipelines through the water distributor 19. Low-temperature circulating water, which has been used for power generation, flows from the two pure low-temperature waste heat power generation equipment 47 into the two return water pipelines 8, then through the water collector 17 into the return water main pipe 18. The circulating water in the return water main pipe 18 then flows through the water distributor 19 into the two heat exchange pipes 9.

[0030] Refer to the attached Figure 1 、 3 As shown in Figure 4, the steam network 3 includes a steam delivery main 20 and two steam delivery manifolds 21. A gas cylinder 22 and a gas collecting cylinder 23 are provided between the steam delivery main 20 and the steam delivery manifolds 21. The two ends of the two steam delivery manifolds 21 are connected to the steam delivery main 20 through the gas cylinder 22 and the gas collecting cylinder 23 respectively; the detection component also includes a steam flow meter 24. A steam flow meter 24 and a steam valve 25 are provided at one end of the steam delivery main 20 close to the gas cylinder 22. The steam flow meter 24 can be a DN80 steam flow meter 24. The setting of the steam flow meter 24 enables the operator to monitor the total steam consumption of the multi-purpose ORC pure low-temperature waste heat power generation equipment test bench in real time, and based on this, adjust the total steam supply of the steam network 3 through the steam valve 25 to achieve the required supply state. In this solution, steam valves 25 can also be provided on the two steam delivery manifolds 21 respectively to achieve separate control of the steam supply in each steam delivery manifold 21.

[0031] Refer to the attached Figures 1 to 2 As shown, the primary heat exchange mechanism 4 is disposed on the steam main pipe 20 to exchange heat between the steam main pipe 20 and the return water main pipe 18. The primary heat exchange mechanism 4 includes a heat exchange tube 26 disposed in the steam main pipe 20. The heat exchange tube 26 is arranged along the axis of the steam main pipe 20 and spirally arranged around the axis of the steam main pipe 20. Both ends of the heat exchange tube 26 extend through the side wall of the steam main pipe 20. The return water main pipe 18 includes a front section tube 27 connected to the water collector 17 and a rear section tube 28 connected to the water distributor 19. The two ends of the heat exchange tube 26 are connected to the front section tube 27 and the rear section tube 28, respectively. The spiral arrangement of the heat exchange tube 26 in the steam main pipe 20 increases the contact area between the heat exchange tube 26 and the steam in the steam main pipe 20, optimizes the heat exchange effect between the circulating water and the steam, and improves the utilization rate of the heat carried by the steam.

[0032] Refer to the attached Figure 1 、 3As shown in Figure 4, two secondary heat exchange mechanisms 5 are provided. The two secondary heat exchange mechanisms 5 are respectively provided on the two steam delivery manifolds 21 so that the two steam delivery manifolds 21 can respectively exchange heat with the two heat exchange pipes 9. The secondary heat exchange mechanism 5 includes a booster heat exchange cylinder 29. A heat exchange chamber 30 is provided in the booster heat exchange cylinder 29. A heat exchange plate 31 is obliquely provided in the heat exchange chamber 30. The side surface of the heat exchange plate 31 is sealed and connected to the heat exchange chamber 30 so that the heat exchange chamber 30 is divided into a high-pressure chamber 32 for circulating water and a low-pressure chamber 33 for steam circulation. The upper end of the heat exchange plate 31 is inclined toward the high-pressure chamber 32. The heat exchange pipeline 9 includes a front heat exchange pipe 34 connected to the water distributor 19 and a rear heat exchange pipe 35 connected to the water supply pipeline 7. The high-pressure chamber 32 is connected to the front heat exchange pipe 34 and the rear heat exchange pipe 35. The connection between the rear heat exchange pipe 35 and the high-pressure chamber 32 is located below the heat exchange plate 31. The end of the front heat exchange pipe 34 connected to the high-pressure chamber 32 is also provided with an atomizing nozzle 36 facing the heat exchange plate 31; a first booster pump 37 is provided on the front heat exchange pipe 34, and a second booster pump 38 is provided on the rear heat exchange pipe 35; the steam delivery manifold 21 includes a front manifold 39 connected to the gas distribution cylinder 22 and a rear manifold 40 connected to the gas collecting cylinder 23. The front manifold 39 is arranged below the heat exchange plate 31, and the rear manifold 40 is arranged above the heat exchange plate 31. The front manifold 39 is also provided with a steam valve 25 for changing the steam flow rate. In this solution, the first booster pump 37 and the second booster pump 38 can both be high-temperature, high-pressure water pumps 10 capable of delivering circulating water at 130°C-150°C, and the model can be DN50. The circulating water in the return water pipeline 8 flows into the return water main 18 through the water collector 17, and then flows into the heat exchange front pipes 34 of the two heat exchange pipes 26 through the water distribution pipes. After being pressurized by the first booster pump 37, it flows to the atomizing nozzle 36. The atomizing nozzle 36 sprays the circulating water in the form of a mist onto the heat exchange plate 31. On the other side of the heat exchange plate 31, steam continuously flows from the front manifold 39 into the low-pressure chamber 33 and exchanges heat with the circulating water in the high-pressure chamber 32 through the heat exchange plate 31. It then flows out of the low-pressure chamber 33 through the rear manifold 40 and flows into the steam delivery main 20 through the gas collecting cylinder 23. When the booster heat exchange cylinder 29 performs heat exchange between steam and circulating water, the first booster pump 37 and the second booster pump 38 increase the pressure of the circulating water, ensuring that the circulating water at 130°C-150°C remains liquid as it flows to the pure low-temperature waste heat power generation equipment 47. The tilted arrangement of the heat exchange plates 31 guides the flow of steam, allowing it to flow quickly through the low-pressure chamber 33. This reduces the time that the cooled steam remains in the low-pressure chamber 33 after heat exchange, optimizing the heat exchange effect.

[0033] Refer to the attached Figure 4 and 5As shown, a water conduit 41 is also provided in the low-pressure chamber 33. One end of the water conduit 41 is connected to the lower edge of the heat exchange plate 31, and the other end of the water conduit 41 is connected to a water collection tank 42. The inclined arrangement of the heat exchange plate 31 allows the steam, after transferring heat, to cool down and partially condense into small droplets. These droplets flow along the inclined surface of the heat exchange plate 31 into the water conduit 41 and are ultimately collected by the water collection tank 42.

[0034] Refer to the attached Figure 4 and 5 As shown, an isolation plug 43 is provided at one end of the water conduit 41 communicating with the low-pressure chamber 33. The isolation plug 43 is provided with a plurality of through-holes 44, including a first bend 45 and a second bend 46. The second bend 46 is located above the first bend 45. This arrangement allows a portion of the steam that has condensed into liquid droplets to gather at the first bend 45, sealing the through-holes 44 and reducing the possibility of gaseous steam entering the water collection tank 42 through the through-holes 44. The liquefied steam continuously accumulates at the first bend 45 of the through-hole 44. When the liquid level of the liquefied steam exceeds the highest point of the second bend 46, the excess steam flows from the through-hole 44 through the second bend 46 into the water collection tank 42.

[0035] Working principle:

[0036] In this solution, the multi-purpose ORC pure low-temperature waste heat power generation equipment test bench simulates heat sources capable of providing low-temperature waste heat, such as distributed gas turbine power plants, industrial waste heat, landfill gas power generation waste heat, ships, and petrochemical systems, to power pure low-temperature waste heat power generation equipment 47. The test bench's steam flow rate, circulating water temperature, and flow rate are detected by the test component during the test state. The test bench's output power is then compared with the power output of the tested pure low-temperature waste heat power generation equipment 47 during the test state to determine whether the tested pure low-temperature waste heat power generation equipment meets the set power. Alternatively, the test bench's output power is adjusted to the amount of heat required for the tested pure low-temperature waste heat power generation equipment 47 to achieve the set power, and the test bench's power output is then monitored to determine whether the tested pure low-temperature waste heat power generation equipment 47 can achieve the set power. The circulating water circulates in the circulation pipeline, and after being heated by the heat exchanger 2, it flows into the pure low-temperature waste heat power generation equipment 47, where the heat is used to generate electricity. After power generation, the circulating water flows back into the circulation pipeline for the next heating use. The circulating water flowing into the return water pipe 8 from the two pure low-temperature waste heat power generation equipment 47 is at a low temperature. It flows through the water collector 17 and into the return water main 18. There, it undergoes initial heating by the primary heat exchange mechanism 4, becoming medium-temperature circulating water. The medium-temperature circulating water flows through the water distributor 19 into the two heat exchange pre-pipes 34. After being heated by the two secondary heat exchange mechanisms 5, it flows into the two water supply pipes 7, through which it enters the pure low-temperature waste heat power generation equipment 47. The circulating water flowmeter 12 and thermometer 11 installed on the water supply pipes 7 indicate the amount of heat supplied to the pure low-temperature waste heat power generation equipment 47 per unit time by the multi-purpose ORC pure low-temperature waste heat power generation equipment test bench. Based on the output power of the pure low-temperature waste heat power generation equipment 47 at this time, it can be determined whether the tested pure low-temperature waste heat power generation equipment 47 has reached its rated power generation capacity. In this solution, steam valves 25 can be further provided on the two steam delivery manifolds 21 to achieve separate control of the steam supply in each steam delivery manifold 21, thereby achieving simultaneous power factory testing of two pure low-temperature waste heat power generation equipment 47 with different design powers. The test bench also includes an automated control system, various sensors and detection components, which detect the flow or temperature of the steam pipe network and the high-temperature water circulation network in real time to provide a stable heat source for the pure low-temperature waste heat power generation equipment 47 to detect the total power generation of the low-temperature waste heat power generation and type test.

[0037] The above technical solutions only reflect the preferred technical solutions of the technical solutions of the present invention. Any changes that may be made to certain parts thereof by those skilled in the art all reflect the principles of the present invention and fall within the scope of protection of the present invention.

Claims

1. A multi-purpose ORC pure low-temperature waste heat power generation equipment detection test bench, comprising a test bench body for detecting the power generation of a pure low-temperature waste heat power generation equipment (47), the test bench body comprising a high-temperature water circulation system (1) and a heat exchange device (2) for performing heat exchange on circulating water in the high-temperature water circulation system (1), characterized in that: The high-temperature water circulation system (1) includes two high-temperature water circulation networks (6) respectively connected to two pure low-temperature waste heat power generation equipment (47); the test bench body also includes a steam pipe network (3) for conveying steam to the heat exchange device (2); the heat exchange device (2) includes a primary heat exchange mechanism (4) for preheating the circulating water and a secondary heat exchange mechanism (5) for further heating the preheated circulating water; the circulating water heated by the heat exchange device (2) flows into the high-temperature water circulation system (1) again after being used for power generation by the pure low-temperature waste heat power generation equipment (47); the test bench body also includes a detection component, which detects the power generation of the pure low-temperature waste heat power generation equipment (47) by measuring the flow rate or temperature of the steam pipe network (3) and the high-temperature water circulation network (6); The high-temperature water circulation network (6) comprises a water supply pipeline (7), a water return pipeline (8) and a heat exchange pipeline (9); one end of the heat exchange pipeline (9) is connected to the water return pipeline (8), and the other end of the heat exchange pipeline (9) is connected to the water supply pipeline (7); one end of the water supply pipeline (7) away from the heat exchange pipeline (9) and one end of the water return pipeline (8) away from the heat exchange pipeline (9) are respectively connected to the pure low-temperature waste heat power generation equipment (47); the circulating water in the high-temperature water circulation network (6) is circulated according to the heat exchange The heat exchange pipeline (9), the water supply pipeline (7), the pure low-temperature waste heat power generation equipment (47), and the return pipeline (8) flow in sequence; the high-temperature water circulation network (6) exchanges heat with the heat exchange device (2) through the heat exchange pipeline (9) and the return pipeline (8), the circulating water flows in the heat exchange pipeline (9) along the first-level heat exchange mechanism (4) toward the second-level heat exchange mechanism (5), and the steam flows in the steam pipeline (3) along the second-level heat exchange mechanism (5) toward the first-level heat exchange mechanism (4); The steam pipe network (3) comprises a steam delivery main pipe (20) and two steam delivery manifolds (21); a gas distribution cylinder (22) and a gas collection cylinder (23) are arranged between the steam delivery main pipe (20) and the steam delivery manifolds (21); the two ends of the two steam delivery manifolds (21) are respectively connected to the steam delivery main pipe (20) through the gas distribution cylinder (22) and the gas collection cylinder (23); the detection component further comprises a steam flow meter (24); the steam flow meter (24) and a steam valve (25) are arranged at one end of the steam delivery main pipe (20) close to the gas distribution cylinder (22); The primary heat exchange mechanism (4) is arranged on the steam delivery main pipe (20) so that the steam delivery main pipe (20) and the return water main pipe (18) can exchange heat. The primary heat exchange mechanism (4) includes a heat exchange tube (26) arranged in the steam delivery main pipe (20). The heat exchange tube (26) is arranged along the axial direction of the steam delivery main pipe (20) and spirally arranged around the axis of the steam delivery main pipe (20). Both ends of the heat exchange tube (26) penetrate the side wall of the steam delivery main pipe (20). The return water main pipe (18) includes a front section tube (27) connected to the water collector (17) and a rear section tube (28) connected to the water distributor (19). Both ends of the heat exchange tube (26) are respectively connected to the front section tube (27) and the rear section tube (28). Two secondary heat exchange mechanisms (5) are provided, and the two secondary heat exchange mechanisms (5) are respectively provided on the two steam delivery manifolds (21) so that the two steam delivery manifolds (21) respectively perform heat exchange with the two heat exchange pipelines (9), and the secondary heat exchange mechanism (5) comprises a booster heat exchange cylinder (29), a heat exchange chamber (30) is provided in the booster heat exchange cylinder (29), a heat exchange plate (31) is obliquely provided in the heat exchange chamber (30), a side surface of the heat exchange plate (31) is sealedly connected to the heat exchange chamber (30) so that the heat exchange chamber (30) is divided into a high-pressure chamber (32) for circulating water and a low-pressure chamber (33) for steam, and an upper end of the heat exchange plate (31) is inclined toward the high-pressure chamber (32); A water collector (17) is connected to the position of the return water pipeline (8) in the two high-temperature water circulation networks (6), and a return water main pipe (18) is connected to the water collector (17). The return water main pipe (18) is connected to a water distributor (19) at one end away from the water collector (17). The return water main pipe (18) is connected to the heat exchange pipelines (9) in the two high-temperature water circulation networks (6) through the water distributor (19).

2. The multi-purpose ORC pure low-temperature waste heat power generation equipment detection test bench according to claim 1 is characterized by: The water supply pipeline (7) is also provided with a water pump (10) for conveying circulating water heated by the heat exchange device (2) to the pure low-temperature waste heat power generation equipment (47); the detection component comprises a thermometer (11) and a circulating water flow meter (12); the thermometer (11) is arranged on the water supply pipeline (7) close to the end where the circulating water flows out of the secondary heat exchange mechanism (5); the circulating water flow meter (12) is arranged on the heat exchange pipeline (9) at the end where the secondary heat exchange mechanism (5) is away from the primary heat exchange mechanism (4); The circulating water flow meter (12) is used to detect the circulating water flow rate; the high-temperature water circulation system (1) also includes a high-temperature water pressure stabilizing tank (13) and a warm water pressure stabilizing tank (14); the high-temperature water pressure stabilizing tank (13) is connected to the water supply pipeline (7); the warm water pressure stabilizing tank (14) is connected to the return water pipeline (8); the high-temperature water pressure stabilizing tank (13) is connected to the water supply pipeline (7) via a high-temperature water intermediate tank (15); and the warm water pressure stabilizing tank (14) is connected to the return water pipeline (8) via a warm water intermediate tank (16).

3. The multi-purpose ORC pure low-temperature waste heat power generation equipment detection test bench according to claim 1 is characterized by: The heat exchange pipeline (9) comprises a heat exchange front pipe (34) connected to the water distributor (19) and a heat exchange rear pipe (35) connected to the water supply pipeline (7); the high-pressure chamber (32) is in communication with the heat exchange front pipe (34) and the heat exchange rear pipe (35); the connection point between the heat exchange rear pipe (35) and the high-pressure chamber (32) is located below the heat exchange plate (31); one end of the heat exchange front pipe (34) in communication with the high-pressure chamber (32) is also provided with an atomizing nozzle (36) facing the heat exchange plate (31); A first booster pump (37) is arranged on the front pipe (34), and a second booster pump (38) is arranged on the heat exchange rear pipe (35); the steam delivery manifold (21) comprises a front manifold (39) connected to the gas distribution cylinder (22) and a rear manifold (40) connected to the gas collection cylinder (23); the front manifold (39) is arranged below the heat exchange plate (31), and the rear manifold (40) is arranged above the heat exchange plate (31); and a steam valve (25) for changing the steam flow rate is also arranged on the front manifold (39).

4. The multi-purpose ORC pure low-temperature waste heat power generation equipment detection test bench according to claim 1 is characterized by: The low-pressure chamber (33) is also provided with a water pipe (41), one end of the water pipe (41) is connected to the lower edge of the heat exchange plate (31), and the other end of the water pipe (41) is connected to a water collecting tank (42).

5. The multi-purpose ORC pure low-temperature waste heat power generation equipment detection test bench according to claim 4 is characterized by: An isolation plug (43) is also provided at one end of the water conduit (41) communicating with the low-pressure chamber (33). The isolation plug (43) is provided with a plurality of through holes (44). The through holes (44) include a first bend (45) and a second bend (46). The second bend (46) is located above the first bend (45).

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