CN213208273U - High-efficient steam supply device - Google Patents
High-efficient steam supply device Download PDFInfo
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- CN213208273U CN213208273U CN202021742509.0U CN202021742509U CN213208273U CN 213208273 U CN213208273 U CN 213208273U CN 202021742509 U CN202021742509 U CN 202021742509U CN 213208273 U CN213208273 U CN 213208273U
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Abstract
The utility model discloses a high-efficient steam supply device. The high-efficiency steam supply device comprises a heat pump system, an ejector system and a flash tank for generating flash steam, wherein the flash tank is provided with a pressure controller, and the pressure controller is used for adjusting the pressure in the flash tank; the inlet of the flash tank is connected with the hot water generating part in the heat pump system, the outlet of the flash tank is connected with the ejector system, and the ejector system is also connected with the high-pressure hot water generating part in the heat pump system through heat exchange. The utility model discloses make full use of heat pump and the efficient and energy-conserving characteristics of sprayer, then the coupling flash tank has realized the technology of using clean electric power to prepare well low pressure steam as the basis, both can improve the system efficiency, and the reduction system load can satisfy a great deal of industrial production again to the user demand of well low pressure steam.
Description
Technical Field
The utility model belongs to steam supply equipment field, especially a provide energy-efficient steam supply device of well low pressure steam.
Background
At present, medium and low pressure steam is a high-efficiency heat treatment energy type in the existing industrial production and is widely applied to the industries of food, textile, paper making, medicine and the like. Generally, a traditional boiler is used as a heating device, and fossil fuels such as coal, fuel oil and the like are used as raw materials to prepare medium-low pressure steam. However, scattered and small boiler heating devices are not only generally high in consumption and low in efficiency, but also generate a large amount of waste gas containing atmospheric pollutants such as nitrogen oxides, sulfides, dust and the like, and therefore, an alternative energy supply device is needed urgently. The electric energy has the advantages of cleanness, safety, convenience and the like, and the implementation of electric energy substitution is favorable for promoting the clean development of energy sources. Meanwhile, in order to meet the industrial production requirements, it is necessary to find an efficient steam supply device based on clean electric power.
A heat pump is an energy utilization device that transfers heat from a low-temperature object to a high-temperature object under a condition that a part of high potential energy is consumed as a compensation condition. Because of the advantages of mature technology, safety and reliability, heat pump technology is often used to obtain a large amount of low-grade heat energy from natural or industrial waste heat and convert it into higher-grade heat energy. An ejector typically uses high pressure fluid to draw low pressure fluid through a restriction in a nozzle to produce medium pressure fluid, and is also an energy efficient device.
At present, most devices for preparing steam by using a heat pump system simply combine a compression heat pump and an auxiliary electric heating device together, the heat pump system is used for heating sensible heat of water, and the heat required by the water to be changed into steam is completely heated by the auxiliary electric heating device. For example, chinese patent publication No. CN203784896U discloses a heat pump steam unit, which is not ideal in energy saving when all latent heat of water into steam is supplied by electric heating. Some heat pump devices use high-temperature high-pressure steam as power to absorb low-grade heat, for example, chinese patent publication No. CN207230508U discloses a system for producing medium-pressure steam by combining an atmospheric steam heat pump and a high-pressure steam boiler, which produces medium-temperature medium-pressure steam by organically combining the atmospheric steam heat pump and the high-pressure steam boiler, and uses a heat pump in cooperation with a pressure reducing valve to produce normal-pressure saturated steam at about 100 ℃. Chinese patent application publication No. CN106440487A discloses a combined two-stage steam heat pump system, which includes a reboiler, an injection heat pump and a steam compression heat pump, and injects steam from a flash tank with high-temperature and high-pressure steam, but because the flash steam pressure is low, the expansion ratio is low, and the injection coefficient is also low, the medium and low-pressure steam prepared by the system is still mainly obtained by cooling and reducing the pressure with high-temperature and high-pressure steam, and the energy saving advantages of the heat pump unit and the injector are not embodied.
SUMMERY OF THE UTILITY MODEL
The utility model aims to solve the technical problem that overcome the defect that above-mentioned prior art exists, provide a high-efficient steam supply device, it not only can provide well low pressure steam, but also adjustable steam pressure and flow.
Therefore, the utility model discloses a following technical scheme can realize: a high-efficiency steam supply device comprises a heat pump system, an ejector system and a flash tank for generating flash steam, wherein the flash tank is provided with a pressure controller for regulating the pressure in the flash tank; the inlet of the flash tank is connected with a hot water generating part in the heat pump system, the outlet of the flash tank is connected with the ejector system, and the ejector system is also connected with a high-pressure hot water generating part in the heat pump system.
The heat pump system can utilize natural heat sources or industrial waste heat to generate hot water, and part of the hot water generates low-pressure steam in the flash tank and is used as injection steam after being pressurized; the other part of hot water heats high-pressure feed water to form high-pressure hot water, so that the heat supply proportion of the heater is reduced, and the specific gravity of heat energy provided by a heat pump system in the production process of the device is increased; the flash tank realizes the regulation of steam pressure and flow by changing the internal pressure; the ejector system uses part of high-temperature high-pressure steam as power to eject low-temperature low-pressure steam, so that middle-low-pressure steam is produced for load equipment.
Furthermore, the heat pump system comprises a hot water heat pump unit and a heat exchanger, wherein a water inlet of the hot water heat pump unit is connected with external water supply through a first control valve, a water inlet of the hot water heat pump unit is connected with a shell side outlet of the heat exchanger and a circulating water outlet of the flash tank, a water outlet of the hot water heat pump unit is respectively connected with an inlet of the flash tank and a shell side inlet of the heat exchanger through control valves, a tube side inlet of the heat exchanger is connected with external high-pressure water supply through a high-pressure control valve, and a tube side outlet of the heat exchanger is connected with the ejector system.
The ejector system comprises a compressor, an ejector and a heater, wherein an injection steam inlet of the ejector is connected with an outlet of the compressor, a working steam inlet of the ejector is connected with an outlet of the heater, an inlet of the compressor is connected with a steam outlet of the flash tank, an inlet of the heater is connected with a pipe side outlet of the heat exchanger, and the heater heats high-pressure hot water flowing through the heater to become high-temperature high-pressure steam.
The utility model discloses make full use of heat pump and the efficient and energy-conserving characteristics of sprayer, then coupling flash tank has realized the technology of preparing well low pressure steam with the compressor, both can improve the system efficiency, and the reduction system load can satisfy a great deal of industrial production again to the user demand of well low pressure steam in the difference.
Furthermore, the hot water heat pump unit is a heat pump unit or a heat pump combination composed of a plurality of heat pump units.
Further, a shell side outlet of the heat exchanger is connected with a water inlet of the hot water heat pump unit through a first pressure pump.
Furthermore, the flash tank is provided with a water replenishing port for replenishing water, and the water replenishing port replenishes water through a water replenishing control valve.
Further, a circulating water outlet of the flash tank is connected with a water inlet of the hot water heat pump unit through a second pressure pump.
Further, the compressor is used for increasing the steam pressure, and a power device of the compressor can resist high temperature.
In the heat pump system, the two pressure pumps are not directly connected in performance.
Compared with the prior art, the utility model discloses following beneficial effect has:
1. through the organic matching of the two systems, the device can recover the waste heat of an external heat source and prepare medium-low pressure steam, steam meeting requirements is provided for various industrial production processes, the high fossil energy consumption of an original steam providing mode (such as a boiler heating device) is saved, and the comprehensive effects of high efficiency, energy conservation, low carbon and environmental protection are achieved.
2. The device is provided with a flash tank which can generate low-pressure steam; the flash tank is provided with a pressure controller, and the flash pressure can be adjusted, so that the pressure, the temperature and the flow of flash steam are changed, and the requirements of medium and low pressure steam with different flow and different pressure are met.
3. The compressor is used for increasing the pressure of the flash steam, the compression ratio of the ejector can be reduced, the injection coefficient is improved, the low-temperature and low-pressure steam from the flash tank is utilized in the ejector as much as possible, and the integral COP of the device is improved.
4. Through the organic matching of the heat exchanger and the heater, the waste heat of an external heat source can be indirectly utilized by heating the high-pressure feed water, so that the overall efficiency of the steam supply device is improved.
5. The utility model discloses an injector operating mode is set for reference existing research data, and the relation between compression ratio (discharge steam pressure/injection steam pressure), expansion ratio (work steam pressure/injection steam pressure) and injection coefficient (injection gas volume/work steam volume) three through the injector is adjusted discharge steam pressure, and it is required that messenger's discharge steam parameter accords with load equipment.
6. The silencer can be additionally arranged, so that the noise is reduced, and the related environmental protection requirements are met.
Drawings
Fig. 1 is a schematic structural diagram of the present invention.
In the figure, A: a heat pump system; b: an ejector system.
1: first control valve, 2: hot water heat pump set, 3: flash tank, 4: heat exchanger, 5: first pressure pump, 6: second pressure pump, 7: compressor, 8: ejector, 9: heater, 10: high-pressure control valve, 11: water replenishment control valve, 12: a pressure controller.
Detailed Description
The invention is further described with reference to the drawings and the detailed description.
In this embodiment, a high-efficiency steam supply device is composed of a set of heat pump system a, a set of ejector system B and a flash tank 3, the flash tank 3 is provided with a pressure controller 12, an inlet of the flash tank 3 is connected with a hot water generating part in the heat pump system a, an outlet of the flash tank 3 is connected with the ejector system B, and the ejector system B is further connected with a high-pressure hot water generating part in the heat pump system a.
Heat pump system A constitute the utility model discloses a first part, including hot water heat pump set 2 and heat exchanger 4, 2 water inlets 21 of hot water heat pump set connect outside feedwater through first control valve 1, simultaneously 2 water inlets 21 of hot water heat pump set connect 4 shell side export 42 of heat exchanger with flash tank 3 circulating water export 32, 2 delivery port 22 of hot water heat pump set connect respectively through the control valve flash tank 3 enter 31 with 4 shell side entry 41 of heat exchanger, 4 pipe side entry 43 of heat exchanger connect outside high pressure feedwater through high pressure control valve 10, 4 pipe side exit 44 of heat exchanger connect ejector system B.
The hot water heat pump unit 2 is a heat pump combination composed of a plurality of heat pump units.
The shell side outlet 42 of the heat exchanger 4 is connected with the water inlet 21 of the hot water heat pump unit 2 through a first pressure pump 5.
The pressure controller 12 regulates the pressure in the flash tank, and the steam generated by the flash tank 3 is connected to the ejector system B through an outlet 33.
The flash tank 3 is provided with a water replenishing port, and the water replenishing port replenishes water through a water replenishing control valve 11.
And the circulating water outlet 32 of the flash tank 3 is connected with the water inlet 21 of the hot water heat pump unit 2 through a second pressure pump 6.
The first pressure pump 5 and the second pressure pump 6 of the heat pump system a are not directly connected in performance.
Ejector system B constitute the utility model discloses a second part, including compressor 7, ejector 8 and heater 9, ejector 8 draw and penetrate steam inlet 82 and connect compressor 7 export, ejector 8's working steam inlet 81 connect heater 9 export, compressor 7 access connection the export 33 of flash tank 3 steam, heater 9 access connection heat exchanger 4 pipe side export 44.
The heat pump system a constituting the first part functions to recover heat by a hot water heat pump unit using a natural heat source or industrial waste heat and to prepare hot water. The hot water is used in two parts, one part generates steam in the flash tank and then is used as injection low-pressure steam forming the second part ejector system B, and the other part heats high-pressure feed water by the low-temperature hot water, so that the heating amount of the heater 9 is properly reduced.
The ejector system B forming the second part is used for ejecting low-pressure steam by taking high-temperature and high-pressure working steam as power so as to produce medium-low-pressure steam to provide for equipment loads. In the process, the compressor 7 continuously pressurizes the flash steam, so that the compression ratio of the ejector is reduced, the injection coefficient is improved, and low-temperature and low-pressure steam is injected as much as possible; the heater 9 heats the high-pressure hot water at the tube-side outlet of the heat exchanger 4 to high-temperature high-pressure steam.
The flash tank 3 is provided with a pressure controller 12 which can regulate the flash pressure in the tank. When the flash pressure is lower, the flow of the flash steam is larger, the flash steam is injected by high-temperature high-pressure steam after being pressurized by the compressor 7, and the prepared medium-low pressure steam has relatively lower pressure and larger flow. When the flash pressure is higher, the flow rate of flash steam is smaller but the pressure is higher, after the flash steam is pressurized by the compressor 7, the compression ratio of the ejector is reduced, the ejection coefficient is improved, and the pressure of the prepared medium-low pressure steam is higher and can reach more than 1 Mpa.
Referring to the system configuration diagram of fig. 1, when the apparatus starts to operate, the hot water heat pump unit 2 uses heat of the commercial waste heat to produce hot water having a temperature of about 120 ℃. Then, the flash pressure of the flash tank 3 is adjusted, thereby generating low-temperature and low-pressure steam. During operation, the flash tank 3 can rapidly reduce the water temperature due to a large amount of evaporation, and the low-temperature water is boosted through the circulating water outlet 32 by the second pressure pump 6 and then introduced into the water inlet 21 of the hydrothermal pump unit to realize circulation. During stable operation, the medium loss in the heat pump system A is mainly in a mode of flashing steam, so that the first control valve 1 is used for supplying less water to the hot water heat pump unit 2. Part of hot water at the outlet of the hot water heat pump unit 2 is led to the heat exchanger 4 to heat high-pressure feed water, the generated high-pressure low-temperature hot water is heated by the heater 9 to become high-temperature high-pressure steam, and then the high-temperature high-pressure steam is used as working steam of the ejector 8, so that the low-temperature low-pressure steam at the outlet of the compressor 7 is ejected, medium-pressure steam with the pressure of about 0.7Mpa can be prepared at the outlet of the ejector 8, and the steam is provided for load equipment.
The above description is only exemplary of the preferred embodiments of the present invention, and should not be construed as limiting the scope of the present invention, and any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the present invention.
Claims (8)
1. A high efficiency steam supply comprising a heat pump system (a), an ejector system (B) and a flash tank (3) for producing flash steam, characterized in that said flash tank (3) is provided with a pressure controller (12), said pressure controller (12) being adapted to regulate the pressure in the flash tank; the inlet of the flash tank (3) is connected with the hot water generating part in the heat pump system (A), the outlet of the flash tank (3) is connected with the ejector system (B), and the ejector system (B) is also connected with the high-pressure hot water generating part in the heat pump system (A).
2. The high-efficiency steam supply device according to claim 1, wherein the heat pump system (A) comprises a hot water heat pump unit (2) and a heat exchanger (4), a water inlet (21) of the hot water heat pump unit (2) is connected with external water supply through a first control valve (1), meanwhile, a water inlet (21) of the hot water heat pump unit (2) is connected with a shell side outlet (42) of the heat exchanger (4) and a circulating water outlet (32) of the flash tank (3), a water outlet (22) of the hot water heat pump unit (2) is respectively connected with an inlet (31) of the flash tank (3) and a shell side inlet (41) of the heat exchanger (4) through a control valve, the pipe side inlet (43) of the heat exchanger (4) is connected with external high-pressure feed water through a high-pressure control valve (10), and the pipe side outlet (44) of the heat exchanger (4) is connected with the ejector system (B).
3. The high-efficiency steam supply device according to claim 2, wherein the ejector system (B) comprises a compressor (7), an ejector (8) and a heater (9), an ejector steam inlet (82) of the ejector (8) is connected with an outlet of the compressor (7), a working steam inlet (81) of the ejector (8) is connected with an outlet of the heater (9), an inlet of the compressor (7) is connected with a steam outlet (33) of the flash tank (3), an inlet of the heater (9) is connected with a pipe side outlet (44) of the heat exchanger (4), and the heater heats high-pressure hot water flowing through the heater to become high-temperature high-pressure steam.
4. A high-efficiency steam supply device according to claim 2 or 3, characterized in that the hot water heat pump unit (2) is a heat pump unit or a heat pump combination of a plurality of heat pump units.
5. A high efficiency steam supply device according to claim 2 or 3, wherein the shell side outlet (42) of the heat exchanger (4) is connected to the water inlet (21) of the hot water heat pump unit (2) by a first pressure pump (5).
6. A high efficiency steam supply apparatus as claimed in any one of claims 1 to 3 wherein said flash tank (3) is provided with a water replenishment inlet, said water replenishment inlet being replenished with water through a water replenishment control valve (11).
7. A high efficiency steam supply device as claimed in claim 2 or 3, wherein the circulating water outlet (32) of the flash tank (3) is connected to the water inlet (21) of the hot water heat pump unit (2) via a second pressure pump (6).
8. A high efficiency steam supply unit as claimed in claim 3, wherein said compressor (7) is adapted to provide high steam pressure, and the power plant of said compressor (7) is resistant to high temperatures.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202021742509.0U CN213208273U (en) | 2020-08-19 | 2020-08-19 | High-efficient steam supply device |
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| CN202021742509.0U CN213208273U (en) | 2020-08-19 | 2020-08-19 | High-efficient steam supply device |
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| CN213208273U true CN213208273U (en) | 2021-05-14 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113864747A (en) * | 2021-10-20 | 2021-12-31 | 西安西热节能技术有限公司 | Industrial steam composite steam supply system |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113864747A (en) * | 2021-10-20 | 2021-12-31 | 西安西热节能技术有限公司 | Industrial steam composite steam supply system |
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