CN111044099A - Multipurpose ORC pure low temperature waste heat power generation equipment detection test bench - Google Patents
Multipurpose ORC pure low temperature waste heat power generation equipment detection test bench Download PDFInfo
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Abstract
The invention relates to the technical field of low-temperature waste heat power generation, in particular to a multipurpose ORC pure low-temperature waste heat power generation equipment detection test bed. The multipurpose ORC pure low-temperature waste heat power generation equipment detection test bed provided by the invention is a detection test bed which is firstly established in China and can carry out thermal load test run on various low-temperature waste heat power generation equipment in a factory. The invention utilizes steam to simulate waste heat sources, comprises a steam pipe network, a heat exchange device and a high-temperature water circulation system which are built in a factory, and the test bed is provided with two sets of high-temperature water circulation networks and can simultaneously test two pieces of low-temperature waste heat power generation equipment. The test bed also comprises an automatic control system, various sensors and detection components, and the supply of steam is controlled by detecting the flow or temperature of the steam pipe network and the high-temperature water circulation network in real time, so that a stable heat source is provided for the power generation of the pure low-temperature waste heat power generation equipment, and the total power generation power and the type test of the low-temperature waste heat power generation are detected.
Description
Technical Field
The invention relates to the technical field of low-temperature waste heat power generation, in particular to a multipurpose ORC pure low-temperature waste heat power generation equipment detection test bed.
Background
ORC is an abbreviation of organic Rankine cycle, Rankine cycle taking low-boiling point organic matters as working media mainly comprises a waste heat boiler (or a heat exchanger), a turbine, a condenser and a working medium pump, wherein the organic working media absorb heat from waste heat flow in the heat exchanger to generate steam with certain pressure and temperature, the steam enters a turbine machine to expand and do work, so that a generator is driven or other power machines are dragged, the steam discharged from the turbine releases heat to cooling water in a condenser, the steam is condensed into liquid, and finally the liquid is returned to the heat exchanger again by the aid of the working medium pump, so that the cycle is continued continuously.
In order to ensure the performance of the pure low-temperature waste heat power generation equipment before leaving the factory, special detection equipment is needed to detect the performance and the power of the pure low-temperature waste heat power generation equipment.
Disclosure of Invention
Aiming at the defects of the prior art, the invention aims to provide a multipurpose ORC pure low-temperature waste heat power generation equipment detection test bed to solve the problems that the existing detection equipment in the background art is few in types and most of detection efficiency is low.
The technical scheme of the invention is that the multipurpose ORC pure low-temperature waste heat power generation equipment detection test bed is used for achieving the purpose.
The multipurpose ORC pure low-temperature waste heat power generation equipment detection test bed manufactured by the technical scheme of the invention comprises a test bed body for detecting the power generation power of the pure low-temperature waste heat power generation equipment, the test bed body comprises a high-temperature water circulating system and a heat exchange device for exchanging heat of circulating water in the high-temperature water circulating system, the high-temperature water circulation system comprises two high-temperature water circulation networks which are respectively communicated with the two pure low-temperature waste heat power generation devices, the test bed body also comprises a steam pipe network for conveying steam to the heat exchange device, the heat exchange device comprises a primary heat exchange mechanism for preheating circulating water and a secondary heat exchange mechanism for further heating the preheated circulating water, and the circulating water heated by the heat exchange device flows into the high-temperature water circulating system again after being generated and utilized by pure low-temperature waste heat power generation equipment; the laboratory bench body still includes detection subassembly, detection subassembly is through measuring the flow or the temperature of steam pipe network and high temperature water circulation network are in order to realize the detection to pure low temperature waste heat power generation equipment generating power.
The high-temperature water circulation network comprises a water supply pipeline, a water return pipeline and a heat exchange pipeline, one end of the heat exchange pipeline is communicated with the water return pipeline, the other end of the heat exchange pipeline is communicated with the water supply pipeline, one end of the water supply pipeline, far away from the heat exchange pipeline, and one end of the water return pipeline, far away from the heat exchange pipeline, are respectively communicated with the pure low-temperature waste heat power generation equipment, and circulating water flows in the high-temperature water circulation network according to the sequence of the heat exchange pipeline, the water supply pipeline, the pure low-temperature waste heat power generation equipment and the water return pipeline; the high-temperature water circulation network exchanges heat with the heat exchange device through the heat exchange pipeline and the water return pipeline, circulating water flows in the heat exchange pipeline along the direction from the first-stage heat exchange mechanism to the second-stage heat exchange mechanism, and steam flows in the steam pipe network along the direction from the second-stage heat exchange mechanism to the first-stage heat exchange mechanism.
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 assembly comprises a temperature detector and a circulating water flowmeter, the temperature detector is arranged at one end, close to the circulating water flowing out of the secondary heat exchange mechanism, of the water supply pipeline, the circulating water flowmeter is arranged at one end, far away from the primary heat exchange mechanism, of the secondary heat exchange mechanism on the heat exchange pipeline, and the circulating water flowmeter is used for detecting the flow of the circulating water; the high-temperature water circulation system further comprises a high-temperature water pressure stabilizing tank and a warm water pressure stabilizing tank, the high-temperature water pressure stabilizing tank is communicated with the water supply pipeline, the warm water pressure stabilizing tank is communicated with the water return pipeline, the high-temperature water pressure stabilizing tank is communicated with the water supply pipeline through a high-temperature water intermediate tank, and the warm water pressure stabilizing tank is communicated with the water return pipeline through a warm water intermediate tank.
The positions, located on the water return pipelines, of the two high-temperature water circulation networks are also communicated with a water collector, the water collector is also communicated with a water return main pipe, one end, far away from the water collector, of the water return main pipe is also communicated with a water distributor, and the water return main pipe is respectively communicated with the heat exchange pipelines in the two circulation pipelines through the water distributor.
The steam pipe network comprises a steam conveying main pipe and two steam conveying manifolds, a gas distribution cylinder and a gas collection cylinder are arranged between the steam conveying main pipe and the steam conveying manifolds, and two ends of the two steam conveying manifolds are respectively communicated in the steam conveying main pipe through the gas distribution cylinder and the gas collection cylinder; the detection assembly further comprises a steam flow meter, and the steam flow meter and the steam valve are arranged at one end, close to the gas distribution cylinder, of the steam conveying main pipe.
The primary heat exchange mechanism is arranged on the steam conveying main pipe so that the steam conveying main pipe and the water return main pipe can exchange heat, the primary heat exchange mechanism comprises a heat exchange pipe arranged in the steam conveying main pipe, the heat exchange pipe is arranged along the axis direction of the steam conveying main pipe and spirally wound around the axis of the steam conveying main pipe, two ends of the heat exchange pipe penetrate through the side wall of the steam conveying main pipe, the water return main pipe comprises a front-section pipe connected with the water collector and a rear-section pipe communicated with the water distributor, and two ends of the heat exchange pipe are communicated with the front-section pipe and the rear-section pipe respectively.
The two-stage heat exchange mechanism is provided with two, and two-stage heat exchange mechanism sets up respectively two on the steam delivery manifold so that two steam delivery manifold respectively with two the heat exchange pipeline carries out the heat exchange, two-stage heat exchange mechanism includes a pressure boost heat exchange cylinder, be provided with the heat exchange chamber in the pressure boost heat exchange cylinder, the slope is provided with the heat transfer board in the heat exchange chamber, the side of heat transfer board with heat exchange chamber sealing connection so that the heat exchange chamber is separated into the high pressure chamber that supplies the circulating water circulation and the low pressure chamber that supplies the steam circulation, the upper end of heat transfer board to high pressure chamber one side slope.
The heat exchange pipeline comprises a heat exchange front pipe connected with the water separator and a heat exchange rear pipe connected with the water supply pipeline, the high-pressure cavity is communicated with the heat exchange front pipe and the heat exchange rear pipe, the communication position of the heat exchange rear pipe and the high-pressure cavity is positioned below the heat exchange plate, and one end of the heat exchange front pipe communicated with the high-pressure cavity is also provided with an atomizing spray head facing the heat exchange plate; a first booster pump is arranged on the heat exchange front pipe, and a second booster pump is arranged on the heat exchange rear pipe; the steam delivery manifold comprises a front manifold communicated with the gas distribution cylinder and a rear manifold communicated with the gas collection cylinder, the front manifold is arranged below the heat exchange plate, the rear manifold is arranged above the heat exchange plate, and the front manifold is also provided with a steam valve for changing the steam flow.
The low-pressure cavity is also provided with a water guide pipe, one end of the water guide pipe is communicated with the lower edge of the heat exchange plate, and the other end of the water guide pipe is communicated with a water collecting tank.
The water guide pipe is communicated with the low-pressure cavity, one end of the water guide pipe is provided with an isolation plug, the isolation plug is provided with a plurality of through holes, each through hole comprises a first bending part and a second bending part, and the second bending part is located above the first bending part.
By adopting the technical scheme, the invention has the following beneficial effects:
in the scheme, the two high-temperature water circulating networks are arranged, so that the multi-purpose ORC pure low-temperature waste heat power generation equipment detection test bed can be used for detecting two pieces of pure low-temperature waste heat power generation equipment at the same time, and the detection efficiency is greatly improved; meanwhile, the supply amount of steam in the steam pipe network is adjusted through the steam valve, so that the temperature of circulating water flowing into the pure low-temperature waste heat power generation equipment is changed, the multipurpose ORC pure low-temperature waste heat power generation equipment detection test bed is suitable for detection of pure low-temperature waste heat power generation equipment with various power generation powers, and the application range of the multipurpose ORC pure low-temperature waste heat power generation equipment detection test bed is enlarged. The circulating water in the high-temperature water circulation network is secondarily heated by the steam through the primary heat exchange mechanism and the secondary heat exchange mechanism, so that the heat exchange effect between the steam and the circulating water is optimized.
Drawings
FIG. 1 is a schematic diagram of a pipeline connection structure of a detection test bed of the multipurpose ORC pure low-temperature waste heat power generation device;
FIG. 2 is a schematic diagram of a part of the structure of the multi-purpose ORC pure low-temperature waste heat power generation equipment detection test bed;
FIG. 3 is a schematic diagram of a part of the structure of the multi-purpose ORC pure low-temperature waste heat power generation equipment detection test bed;
FIG. 4 is a schematic diagram of a part of the structure of the multi-purpose ORC pure low-temperature waste heat power generation equipment detection test bed;
FIG. 5 is a partial enlarged view of the multi-purpose ORC pure low temperature waste heat power generation equipment detection test bed of the present invention.
In the figure, 1, a high-temperature water circulation system; 2. a heat exchange device; 3. a steam pipe network; 4. a primary heat exchange mechanism; 5. a secondary heat exchange mechanism; 6. a high temperature water circulation network; 7. a water supply line; 8. a water return pipeline; 9. a heat exchange line; 10. a water pump; 11. a temperature detector; 12. a circulating water flow meter; 13. a high-temperature water pressure stabilizing tank; 14. a warm water pressure stabilizing tank; 15. a high-temperature water intermediate tank; 16. a warm water intermediate tank; 17. a water collector; 18. a water return main pipe; 19. a water separator; 20. a steam delivery main; 21. a vapor delivery manifold; 22. dividing a cylinder; 23. a gas collecting cylinder; 24. a steam flow meter; 25. a steam valve; 26. a heat exchange pipe; 27. a front section pipe; 28. a rear section pipe; 29. a pressure boosting heat exchange cylinder; 30. a heat exchange chamber; 31. a heat exchange plate; 32. a high pressure chamber; 33. a low pressure chamber; 34. a heat exchange front pipe; 35. a heat exchange rear pipe; 36. an atomizing spray head; 37. a first booster pump; 38. a second booster pump; 39. a front manifold; 40. a rear manifold; 41. a water conduit; 42. a water collection tank; 43. an isolation plug; 44. a through hole; 45. a first bend; 46. a second bend; 47. pure low temperature waste heat power generation equipment.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings and examples. In which like parts are designated by like reference numerals. It should be noted that as used in the following description, the terms "front," "back," "left," "right," "upper," and "lower" refer to directions in the drawings, and the terms "bottom" and "top," "inner," and "outer" refer to directions toward and away from, respectively, the geometric center of a particular component.
As shown in fig. 1 to 5, the multipurpose ORC pure low temperature waste heat power generation equipment detection test bed comprises a test bed body for detecting the power generation power of the pure low temperature waste heat power generation equipment 47, wherein the test bed body comprises a high temperature water circulation system 1 and a heat exchange device 2 for exchanging heat with the circulating water in the high temperature water circulation system 1.
Referring to fig. 1 to 5, the high-temperature water circulation system 1 includes two high-temperature water circulation networks 6 respectively communicated with two pure low-temperature waste heat power generation devices 47, the test bed body further includes a steam pipe network 3 for delivering 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, and the circulating water heated by the heat exchange device 2 flows into the high-temperature water circulation system 1 again after being generated and utilized by the pure low-temperature waste heat power generation devices 47; the experiment table body further comprises a detection assembly, and the detection assembly detects the generated power of the pure low-temperature waste heat power generation equipment 47 by measuring the flow or the temperature of the steam pipe network 3 and the high-temperature water circulation network 6. In the scheme, steam in a steam pipe network 3 comes from a steam pipeline network in a Hangzhou city, the steam in the steam pipe network 3 exchanges heat with a high-temperature water circulating system 1 in a test bed body through a heat exchange device 2, circulating water in a low-temperature state in the high-temperature water circulating system 1 is preheated by a primary heat exchange mechanism 4 to be heated to medium-temperature circulating water at first, the temperature range of the medium-temperature circulating water is approximately 60-70 ℃, the medium-temperature circulating water continuously flows to pure low-temperature waste heat power generation equipment 47 in the circulating pipeline, when the circulating water passes through a secondary heat exchange mechanism 5, the steam in the steam pipe network 3 further heats the medium-temperature circulating water in the circulating pipeline through the secondary heat exchange mechanism 5, so that the medium-temperature circulating water is heated to be high-temperature circulating water at the temperature of 130-150 ℃, and the high-temperature circulating water flows into one end of the pure low-, the low-temperature circulating water flows into the circulating pipeline from the other end of the pure low-temperature waste heat power generation equipment 47 and carries out the next heat exchange with the steam pipe network 3 through the heat exchange device 2. The arrangement of the two high-temperature water circulation networks 6 enables the test bed body to simultaneously detect the two pure low-temperature waste heat power generation devices 47, and greatly improves the detection efficiency of the multipurpose ORC pure low-temperature waste heat power generation device detection test bed.
Referring to fig. 1 to 4, the high-temperature water circulation network 6 includes 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 communicated with the water return pipeline 8, the other end of the heat exchange pipeline 9 is communicated with the water supply pipeline 7, one end of the water supply pipeline 7 far away from the heat exchange pipeline 9 and one end of the water return pipeline 8 far away from the heat exchange pipeline 9 are respectively communicated with the pure low-temperature waste heat power generation device 47, and circulating water flows in the high-temperature water circulation network 6 according to the sequence of the heat exchange pipeline 9, the water supply pipeline 7, the pure low-temperature waste heat power generation; the high-temperature water circulation network 6 exchanges heat with the heat exchange device 2 through the heat exchange pipeline 9 and the water return pipeline 8, circulating water flows in the heat exchange pipeline 9 along the direction from the first-stage heat exchange mechanism 4 to the second-stage heat exchange mechanism 5, and steam flows in the steam pipe network 3 along the direction from the second-stage heat exchange mechanism 5 to the first-stage heat exchange mechanism 4. The low-temperature circulating water flowing out of the pure low-temperature waste heat power generation equipment 47 is preheated by the primary heat exchange mechanism 4 in the heat exchange device 2 in the water return pipeline 8, then is heated to medium-temperature circulating water and flows into the heat exchange pipeline 9, is secondarily heated by the secondary heat exchange mechanism 5 in the heat exchange device 2, then is heated to high-temperature circulating water and flows into the water supply pipeline 7, then flows into the pure low-temperature waste heat power generation equipment 47 through the water supply pipeline 7 to generate power, and the high-temperature circulating water is cooled to be low-temperature circulating water and flows into the water return pipeline 8 again after the power generation of the pure.
Referring to fig. 1, 3 and 4, the water supply pipeline 7 is further provided with a water pump 10 for conveying the circulating water heated by the heat exchanger 2 to the pure low-temperature waste heat power generation equipment 47; the detection assembly comprises a temperature detector 11 and a circulating water flowmeter 12, the temperature detector 11 is arranged at one end, close to the circulating water outflow secondary heat exchange mechanism 5, of the water supply pipeline 7, the circulating water flowmeter 12 is arranged at one end, far away from the primary heat exchange mechanism 4, of the secondary heat exchange mechanism 5, of the heat exchange pipeline 9, and the circulating water flowmeter 12 is used for detecting the flow of the circulating water; the high-temperature water circulation system 1 further comprises 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 communicated with the water supply pipeline 7, the warm water pressure stabilizing tank 14 is communicated with the water return pipeline 8, the high-temperature water pressure stabilizing tank 13 is communicated with the water supply pipeline 7 through a high-temperature water intermediate tank 15, and the warm water pressure stabilizing tank 14 is communicated with the water return pipeline 8 through a warm water intermediate tank 16. The high-temperature water pressure stabilizing tank 13 and the warm water pressure stabilizing tank 14 can adopt diaphragm type air pressure tanks, and the model of the diaphragm type air pressure tanks can be SQL-2000; the circulating water flow meter 12 can be a turbine flow meter, and the model can be LWQ-250; the temperature detector 11 can be a DT-613 temperature detector; the warm water intermediate tank 16 and the high-temperature water intermediate tank 15 may be water storage tanks having a heat insulating function and capable of withstanding 5 atmospheres of pressure. The arrangement of the temperature detector 11 can enable an operator to monitor the temperature of the circulating water heated by the heat exchange device 2, and the temperature is used as one of the bases for adjusting the steam supply quantity of the steam pipe network 3 to the heat exchange device 2; the arrangement of the circulating water flowmeter 12 can enable an operator to monitor the real-time flow of the circulating water in the high-temperature water circulating network 6; the arrangement of the high-temperature water pressure stabilizing tank 13 and the warm water pressure stabilizing tank 14 can accommodate the circulating water which is heated and expanded in the high-temperature water circulating network 6, after the circulating water is cooled, the high-temperature water pressure stabilizing tank 13 and the warm water pressure stabilizing tank 14 can extrude the circulating water which is heated and expanded and is accommodated into the high-temperature water circulating network 6 again, the warm water intermediate tank 16 and the high-temperature water intermediate tank 15 can play a transition conveying role for the expanded circulating water between the high-temperature water pressure stabilizing tank 13 and the warm water pressure stabilizing tank 14 and the high-temperature water circulating network 6, the accommodating pressure of the high-temperature water pressure stabilizing tank 13 and the warm water pressure stabilizing tank 14 for the expanded circulating water can be effectively reduced, and the possibility of overloading of the high-temperature water pressure stabilizing tank 13 and the warm water pressure stabilizing tank 14 is reduced.
Referring to the attached figure 1, a water collector 17 is further communicated with the position, located at the water return pipeline 8, of the two high-temperature water circulation networks 6, a water return main pipe 18 is further communicated with the water collector 17, a water distributor 19 is further communicated with one end, far away from the water collector 17, of the water return main pipe 18, and the water return main pipe 18 is respectively communicated with the heat exchange pipelines 9 of the two circulation pipelines through the water distributor 19. The low-temperature circulating water after power generation and utilization respectively flows into the two water return pipelines 8 from the two pure low-temperature waste heat power generation devices 47 and then flows into the water return header pipe 18 through the water collector 17, and the circulating water in the water return header pipe 18 respectively flows into the two heat exchange pipelines 9 through the water separator 19.
Referring to fig. 1, 3 and 4, the steam pipe network 3 includes 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, and two ends of the two steam delivery manifolds 21 are respectively communicated in the steam delivery main pipe 20 through the gas distribution cylinder 22 and the gas collection cylinder 23; the detection assembly further comprises a steam flow meter 24, and one end of the steam delivery main pipe 20 close to the steam cylinders 22 is provided with the steam flow meter 24 and a steam valve 25. The steam flow meter 24 may be a DN80 steam flow meter 24. The steam flow meter 24 is arranged to enable an operator to monitor the total steam consumption of the multipurpose ORC pure low-temperature waste heat power generation equipment detection test bed in real time, and accordingly, the total steam supply amount of the steam pipe network 3 is adjusted through the steam valve 25 to enable the steam pipe network to reach a required supply state. In this embodiment, the steam valves 25 may be further disposed on the two steam delivery manifolds 21, so as to realize the individual control of the steam supply amount in each steam delivery manifold 21.
Referring to fig. 1 to 2, the primary heat exchange mechanism 4 is disposed on the steam delivery main pipe 20 to enable the steam delivery main pipe 20 to exchange heat with the water return main pipe 18, the primary heat exchange mechanism 4 includes a heat exchange pipe 26 disposed in the steam delivery main pipe 20, the heat exchange pipe 26 is disposed along the axial direction of the steam delivery main pipe 20 and is spirally disposed around the axial line of the steam delivery main pipe 20, two ends of the heat exchange pipe 26 penetrate through the sidewall of the steam delivery main pipe 20, the water return main pipe 18 includes a front section pipe 27 connected to the water collector 17 and a rear section pipe 28 communicated with the water distributor 19, and two ends of the heat exchange pipe 26 are respectively communicated with the front section pipe 27 and the rear section pipe 28. The heat exchange tube 26 is spirally arranged in the steam conveying main pipe 20, so that the contact area between the heat exchange tube 26 and the steam in the steam conveying main pipe 20 is increased, the heat exchange effect between circulating water and the steam is optimized, and the utilization rate of heat brought by the steam is improved.
Referring to fig. 1, 3 and 4, two secondary heat exchange mechanisms 5 are provided, the two secondary heat exchange mechanisms 5 are respectively disposed on the two steam delivery manifolds 21 to enable the two steam delivery manifolds 21 to respectively exchange heat with the two heat exchange pipelines 9, each secondary heat exchange mechanism 5 includes a pressure boosting heat exchange cylinder 29, a heat exchange cavity 30 is disposed in the pressure boosting heat exchange cylinder 29, a heat exchange plate 31 is obliquely disposed in the heat exchange cavity 30, the side surface of the heat exchange plate 31 is hermetically connected with the heat exchange cavity 30 to enable the heat exchange cavity 30 to be divided into a high pressure cavity 32 for circulating water and a low pressure cavity 33 for circulating steam, and the upper end of the heat exchange plate 31 is inclined towards one side of the high pressure cavity 32. The heat exchange pipeline 9 comprises a heat exchange front pipe 34 connected with the water separator 19 and a heat exchange rear pipe 35 connected with the water supply pipeline 7, the high-pressure cavity 32 is communicated with the heat exchange front pipe 34 and the heat exchange rear pipe 35, the communication position of the heat exchange rear pipe 35 and the high-pressure cavity 32 is positioned below the heat exchange plate 31, and one end of the heat exchange front pipe 34 communicated with the high-pressure cavity 32 is also provided with an atomizing spray head 36 facing the heat exchange plate 31; a first booster pump 37 is arranged on the heat exchange 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 communicated with the branch cylinder 22 and a rear manifold 40 communicated with the gas collecting cylinder 23, the front manifold 39 is arranged below the heat exchange plate 31, the rear manifold 40 is arranged above the heat exchange plate 31, and the front manifold 39 is also provided with a steam valve 25 for changing the steam flow. In the scheme, both the first booster pump 37 and the second booster pump 38 can be high-temperature and high-pressure water pumps 10 capable of conveying circulating water at 130-150 ℃, and the model can be DN 50. Circulating water in the water return pipeline 8 flows into the water return header pipe 18 through the water collector 17, then flows into the heat exchange front pipes 34 of the two heat exchange pipes 26 through water distribution pipes respectively, then flows to the atomizing spray head 36 after being pressurized by the first booster pump 37, the atomizing spray head 36 sprays the circulating water on the heat exchange plate 31 in a mist shape, steam continuously flows into the low-pressure cavity 33 from the front manifold 39 and exchanges heat with the circulating water in the high-pressure cavity 32 through the heat exchange plate 31 on the other side of the heat exchange plate 31, and then flows out of the low-pressure cavity 33 through the rear manifold 40 and flows into the steam conveying header pipe 20 through the steam collection cylinder 23. When the pressure boosting heat exchange cylinder 29 exchanges heat between the steam and the circulating water, the first pressure boosting pump 37 and the second pressure boosting pump 38 boost the circulating water, so that the circulating water at 130-150 ℃ is always in a liquid state in the process of flowing to the pure low-temperature waste heat power generation equipment 47. The inclined arrangement of the heat exchange plate 31 plays a role in guiding the flow direction of the steam, so that the steam can rapidly flow through the low-pressure cavity 33, the retention time of the steam with reduced temperature in the low-pressure cavity 33 after heat exchange is reduced, and the heat exchange effect is optimized.
Referring to fig. 4 and 5, a water conduit 41 is further disposed on 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 heat exchange plate 31 is inclined such that a portion of the steam after transferring heat is condensed into small droplets after being cooled down, and flows into the water guiding pipe 41 along the inclined surface of the heat exchange plate 31 and is finally received by the water collecting tank 42.
Referring to fig. 4 and 5, an isolating plug 43 is further disposed at one end of the water conduit 41 communicating with the low pressure chamber 33, a plurality of through holes 44 are disposed on the isolating plug 43, each through hole 44 includes a first bending portion 45 and a second bending portion 46, and the second bending portion 46 is located above the first bending portion 45. The arrangement is such that a part of the steam condensed into liquid drops is gathered at the first bend 45, a sealing effect is provided for the through hole 44, the possibility that the gaseous steam enters the water collecting tank 42 from the through hole 44 is reduced, the steam is continuously liquefied and accumulated at the first bend 45 of the through hole 44, and when the liquid level of the liquefied steam exceeds the highest point of the second bend 46, the excessive part flows into the water collecting tank 42 from the through hole 44 through the second bend 46.
The working principle is as follows:
in the scheme, the multipurpose ORC pure low-temperature waste heat power generation equipment detection test bed supplies power to the pure low-temperature waste heat power generation equipment 47 by simulating a distributed gas turbine power station, industrial waste heat, landfill gas power generation waste heat, a ship, a petrochemical system and other heat sources capable of providing low-temperature waste heat, detects the flow of steam, the temperature of circulating water and the flow of a test bed body in the current detection state through a detection assembly, and compares the power output by the detected pure low-temperature waste heat power generation equipment 47 in the detection state so as to judge whether the detected pure low-temperature waste heat power generation equipment meets the set power; or the heat output by the test bed body is adjusted to the heat which needs to be absorbed when the detected pure low-temperature waste heat power generation equipment 47 reaches the set power, and whether the generated power of the detected pure low-temperature waste heat power generation equipment 47 can reach the set power is observed. Circulating water circularly flows in the circulating pipeline, the circulating water is heated by the heat exchange device 2 and flows into the pure low-temperature waste heat power generation equipment 47, heat is used for power generation of the pure low-temperature waste heat power generation equipment 47, and the circulating water after power generation and utilization flows into the circulating pipeline again for next heating and utilization. Circulating water flowing into the water return pipeline 8 from the two pure low-temperature waste heat power generation devices 47 is in a low-temperature state, flows into the water return main pipe 18 through the water collector 17, forms medium-temperature circulating water after being primarily heated by the primary heat exchange mechanism 4 in the water return main pipe 18, flows into the two heat exchange front pipes 34 through the water distributor 19, is heated by the two secondary heat exchange mechanisms 5 respectively, then flows into the two water supply pipelines 7 respectively, and enters the pure low-temperature waste heat power generation devices 47 through the water supply pipelines 7. The quantity of heat provided to the pure low-temperature waste heat power generation equipment 47 in unit time by the multipurpose ORC pure low-temperature waste heat power generation equipment detection test bed can be known through the circulating water flowmeter 12 and the temperature detector 11 arranged on the water supply pipeline 7, and then whether the detected pure low-temperature waste heat power generation equipment 47 reaches rated power generation can be obtained according to the output power of the pure low-temperature waste heat power generation equipment 47 at the moment. In this scheme, the steam valves 25 may be further respectively disposed on the two steam delivery manifolds 21, so as to individually control the steam supply amount in each steam delivery manifold 21, thereby implementing the power factory detection on two pure low-temperature waste heat power generation devices 47 with different design powers. The test bed also comprises an automatic control system, various sensors and detection components, and the total power generation power of the low-temperature waste heat power generation and the type test can be detected by detecting the flow or the temperature of the steam pipe network and the high-temperature water circulation network in real time to provide a stable heat source for the power generation of the pure low-temperature waste heat power generation equipment 47
The technical solutions described above only represent the preferred technical solutions of the present invention, and some possible modifications to some parts of the technical solutions by those skilled in the art all represent the principles of the present invention, and fall within the protection scope of the present invention.
Claims (10)
1. Multipurpose ORC pure low temperature waste heat power generation equipment test bench, including the test bench body that is used for detecting pure low temperature waste heat power generation equipment (47) generated power, the test bench body includes high temperature water circulating system (1) and is used for right circulating water in high temperature water circulating system (1) carries out heat transfer device (2) of heat exchange, its characterized in that: the high-temperature water circulation system (1) comprises two high-temperature water circulation networks (6) which are respectively communicated with two pure low-temperature waste heat power generation devices (47), the test bed body further comprises a steam pipe network (3) for conveying steam to the heat exchange device (2), the heat exchange device (2) comprises a primary heat exchange mechanism (4) for preheating circulating water and a secondary heat exchange mechanism (5) for further heating the preheated circulating water, and the circulating water heated by the heat exchange device (2) flows into the high-temperature water circulation system (1) again after being generated and utilized by the pure low-temperature waste heat power generation devices (47); the experiment table body further comprises a detection assembly, and the detection assembly detects the generated power of the pure low-temperature waste heat power generation equipment (47) by measuring the flow or the temperature of the steam pipe network (3) and the high-temperature water circulation network (6).
2. The multipurpose ORC pure low temperature cogeneration plant detection test stand of claim 1, wherein: 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 communicated with the water return pipeline (8), the other end of the heat exchange pipeline (9) is communicated with the water supply pipeline (7), one end, far away from the heat exchange pipeline (9), of the water supply pipeline (7) and one end, far away from the heat exchange pipeline (9), of the water return pipeline (8) are respectively communicated with pure low-temperature waste heat power generation equipment (47), and circulating water flows in the high-temperature water circulation network (6) according to the sequence of the heat exchange pipeline (9), the water supply pipeline (7), the pure low-temperature waste heat power generation equipment (47) and the water return pipeline (8); high-temperature water circulation network (6) are passed through heat exchange pipeline (9) reach return water pipeline (8) with heat transfer device (2) carry out the heat transfer, the circulating water is in follow in heat exchange pipeline (9) one-level heat transfer mechanism (4) to the direction of second grade heat transfer mechanism (5) flows, and steam is in follow in steam pipe network (3) second grade heat transfer mechanism (5) to the direction of one-level heat transfer mechanism (4) flows.
3. The multipurpose ORC pure low temperature cogeneration plant detection test stand of claim 2, wherein: 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 a pure low-temperature waste heat power generation device (47); the detection assembly comprises a temperature detector (11) and a circulating water flowmeter (12), the temperature detector (11) is arranged at one end, close to the circulating water flowing out of the secondary heat exchange mechanism (5), of the water supply pipeline (7), the circulating water flowmeter (12) is arranged at one end, far away from the primary heat exchange mechanism (4), of the secondary heat exchange mechanism (5) of the heat exchange pipeline (9), and the circulating water flowmeter (12) is used for detecting the flow rate of circulating water; high-temperature water circulation system (1) still includes high-temperature water surge tank (13) and warm water surge tank (14), high-temperature water surge tank (13) with supply channel (7) intercommunication, warm water surge tank (14) with return water pipeline (8) intercommunication, high-temperature water surge tank (13) with communicate through a high-temperature water intermediate tank (15) between supply channel (7), warm water surge tank (14) with communicate through a warm water intermediate tank (16) between return water pipeline (8).
4. The multipurpose ORC pure low temperature cogeneration plant detection test stand of claim 2, wherein: the position, located in the water return pipeline (8), of the two high-temperature water circulation networks (6) is further communicated with a water collector (17), the water collector (17) is further communicated with a water return main pipe (18), one end, far away from the water collector (17), of the water return main pipe (18) is further communicated with a water distributor (19), and the water return main pipe (18) is respectively communicated with the heat exchange pipelines (9) in the two circulation pipelines through the water distributor (19).
5. The multipurpose ORC pure low temperature cogeneration plant detection test stand of claim 4, wherein: the steam pipe network (3) comprises a steam conveying main pipe (20) and two steam conveying manifolds (21), a gas distribution cylinder (22) and a gas collection cylinder (23) are arranged between the steam conveying main pipe (20) and the steam conveying manifolds (21), and two ends of the two steam conveying manifolds (21) are respectively communicated in the steam conveying main pipe (20) through the gas distribution cylinder (22) and the gas collection cylinder (23); the detection assembly further comprises a steam flow meter (24), and one end, close to the gas distribution cylinder (22), of the steam delivery main pipe (20) is provided with the steam flow meter (24) and a steam valve (25).
6. The multipurpose ORC pure low temperature cogeneration plant detection test stand of claim 5, wherein: the primary heat exchange mechanism (4) is arranged on the steam conveying main pipe (20) to enable the steam conveying main pipe (20) and the water return main pipe (18) to exchange heat, the primary heat exchange mechanism (4) comprises a heat exchange pipe (26) arranged in the steam conveying main pipe (20), the heat exchange pipe (26) is arranged along the axis direction of the steam conveying main pipe (20) and spirally arranged around the axis of the steam conveying main pipe (20), two ends of the heat exchange pipe (26) penetrate through the side wall of the steam conveying main pipe (20), the water return main pipe (18) comprises a front section pipe (27) connected with the water collector (17) and a rear section pipe (28) communicated with the water distributor (19), and two ends of the heat exchange pipe (26) are respectively communicated with the front section pipe (27) and the rear section pipe (28).
7. The multipurpose ORC pure low temperature cogeneration plant detection test stand of claim 5, wherein: two heat transfer mechanisms (5) are provided with two, two heat transfer mechanisms (5) set up respectively two steam delivery manifold (21) is last so that two steam delivery manifold (21) exchanges heat with two heat exchange pipeline (9) respectively, two heat transfer mechanisms (5) include a pressure boost heat transfer jar (29), be provided with heat exchange chamber (30) in pressure boost heat transfer jar (29), slope is provided with heat transfer board (31) in heat exchange chamber (30), the side of heat transfer board (31) with heat exchange chamber (30) sealing connection is so that heat exchange chamber (30) are separated into high pressure chamber (32) that supply the circulating water circulation and low pressure chamber (33) that supply the steam circulation, the upper end of heat transfer board (31) to high pressure chamber (32) one side slope.
8. The multipurpose ORC pure low temperature cogeneration plant detection test stand of claim 7, wherein: the heat exchange pipeline (9) comprises a heat exchange front pipe (34) connected with the water separator (19) and a heat exchange rear pipe (35) connected with the water supply pipeline (7), the high-pressure cavity (32) is communicated with the heat exchange front pipe (34) and the heat exchange rear pipe (35), the communication position of the heat exchange rear pipe (35) and the high-pressure cavity (32) is positioned below the heat exchange plate (31), and one end of the heat exchange front pipe (34) communicated with the high-pressure cavity (32) is also provided with an atomizing spray head (36) facing the heat exchange plate (31); a first booster pump (37) is arranged on the heat exchange 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) communicated with the gas distribution cylinder (22) and a rear manifold (40) communicated with the gas collection cylinder (23), the front manifold (39) is arranged below the heat exchange plate (31), the rear manifold (40) is arranged above the heat exchange plate (31), and a steam valve (25) used for changing steam flow is further arranged on the front manifold (39).
9. The multipurpose ORC pure low temperature cogeneration plant detection test stand of claim 7, wherein: the low-pressure cavity (33) is further provided with a water guide pipe (41), one end of the water guide pipe (41) is communicated with the lower edge of the heat exchange plate (31), and the other end of the water guide pipe (41) is communicated with a water collecting tank (42).
10. The multipurpose ORC pure low temperature cogeneration plant detection test stand of claim 9, wherein: the water guide pipe (41) is further provided with an isolation plug (43) at one end communicated with the low-pressure cavity (33), a plurality of through holes (44) are formed in the isolation plug (43), each through hole (44) comprises a first bending part (45) and a second bending part (46), and the second bending part (46) is located above the first bending part (45).
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115234525A (en) * | 2022-07-25 | 2022-10-25 | 中国华能集团清洁能源技术研究院有限公司 | Multi-gas-source steam supercharging device |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115234525A (en) * | 2022-07-25 | 2022-10-25 | 中国华能集团清洁能源技术研究院有限公司 | Multi-gas-source steam supercharging device |
| CN115234525B (en) * | 2022-07-25 | 2024-04-02 | 中国华能集团清洁能源技术研究院有限公司 | Multi-air source steam supercharging device |
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