CN111520693A - High-temperature steam unit and method for producing high-temperature steam by using same - Google Patents

High-temperature steam unit and method for producing high-temperature steam by using same Download PDF

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Publication number
CN111520693A
CN111520693A CN202010513265.7A CN202010513265A CN111520693A CN 111520693 A CN111520693 A CN 111520693A CN 202010513265 A CN202010513265 A CN 202010513265A CN 111520693 A CN111520693 A CN 111520693A
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China
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temperature
pipeline
evaporator
refrigerant
water
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CN202010513265.7A
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Chinese (zh)
Inventor
曲勇
许琨
耿花
解玲玉
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Yantai Oceanair Air Conditioning Co ltd
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Yantai Oceanair Air Conditioning Co ltd
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Priority to CN202010513265.7A priority Critical patent/CN111520693A/en
Publication of CN111520693A publication Critical patent/CN111520693A/en
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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F22—STEAM GENERATION
    • F22B—METHODS OF STEAM GENERATION; STEAM BOILERS
    • F22B1/00—Methods of steam generation characterised by form of heating method
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
    • F25B40/00—Subcoolers, desuperheaters or superheaters
    • F25B40/02—Subcoolers
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
    • F25B41/00—Fluid-circulation arrangements
    • F25B41/20—Disposition of valves, e.g. of on-off valves or flow control valves
    • F25B41/22—Disposition of valves, e.g. of on-off valves or flow control valves between evaporator and compressor
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
    • F25B41/00—Fluid-circulation arrangements
    • F25B41/30—Expansion means; Dispositions thereof
    • F25B41/31—Expansion valves
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
    • F25B43/00—Arrangements for separating or purifying gases or liquids; Arrangements for vaporising the residuum of liquid refrigerant, e.g. by heat
    • F25B43/003—Filters
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
    • F25B43/00—Arrangements for separating or purifying gases or liquids; Arrangements for vaporising the residuum of liquid refrigerant, e.g. by heat
    • F25B43/02—Arrangements for separating or purifying gases or liquids; Arrangements for vaporising the residuum of liquid refrigerant, e.g. by heat for separating lubricants from the refrigerant
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28—HEAT EXCHANGE IN GENERAL
    • F28D—HEAT-EXCHANGE APPARATUS, NOT PROVIDED FOR IN ANOTHER SUBCLASS, IN WHICH THE HEAT-EXCHANGE MEDIA DO NOT COME INTO DIRECT CONTACT
    • F28D7/00—Heat-exchange apparatus having stationary tubular conduit assemblies for both heat-exchange media, the media being in contact with different sides of a conduit wall
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
    • F25B2400/00—General features or devices for refrigeration machines, plants or systems, combined heating and refrigeration systems or heat-pump systems, i.e. not limited to a particular subgroup of F25B
    • F25B2400/13—Economisers

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  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Mechanical Engineering (AREA)
  • Thermal Sciences (AREA)
  • General Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Analytical Chemistry (AREA)
  • Power Engineering (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Sustainable Development (AREA)
  • Sustainable Energy (AREA)
  • Engine Equipment That Uses Special Cycles (AREA)

Abstract

The invention relates to a high-temperature steam unit and a method for producing high-temperature steam by using the same. A high-temperature steam unit comprises an evaporator, a high-temperature compressor, an oil separator, a condenser, a steam generator, an economizer, a subcooler and an oil cooler which are connected through pipelines; the device is characterized by comprising a refrigerant circulating pipeline system, wherein an evaporator, a high-temperature compressor oil separator, a condenser, an economizer and a subcooler are connected in series through pipelines to form a closed loop, and the loop is a loop in which refrigerant flows; and the high-temperature steam generating system is used for connecting the steam generator and the condenser through a pipeline to form a closed high-temperature steam generating loop. And provides a method for producing high-temperature steam by using the high-temperature steam unit. The unit of this application simple structure can use the refrigerant of single component to realize the production of high temperature steam.

Description

High-temperature steam unit and method for producing high-temperature steam by using same
Technical Field
The invention relates to a high-temperature steam unit and a method for producing high-temperature steam by using the same, belongs to the technical field of steam units, and particularly relates to a high-temperature steam system.
Background
At present, most of the well-known steam heat pump units adopt modes of multi-stage heating, multi-stage evaporation and the like on the basis of the original conventional refrigeration system to gradually increase the temperature of condensed water so as to meet the requirement that the water temperature reaches 100 ℃.
The steam heat pump unit mostly adopts a mixed refrigerant, and most of the mixed refrigerant is generated in a negative pressure (lower than standard atmospheric pressure) state when steam is prepared, and the temperature of the steam can only approach 100 ℃; the refrigeration system is complicated, the air suction end and the air exhaust end of the high-temperature compressor are provided with a plurality of water pumps in the processes of heating step by step and evaporating step by step through a four-way reversing valve, and the steam output can be realized only by heating through a two-stage heat pump unit. The redundant configuration of the refrigeration system or the multi-stage refrigeration compression cycle greatly increases the initial investment and the maintenance cost, and more importantly, the application range of the saturated steam under negative pressure is greatly limited. How to produce steam at temperatures in excess of 100 c is a matter that needs to be investigated by those skilled in the art.
Disclosure of Invention
The invention provides a high-temperature steam unit and a method for producing high-temperature steam by using the same, aiming at the problems in the prior art.
The technical scheme for solving the technical problems is as follows: a high-temperature steam unit comprises an evaporator, a high-temperature compressor oil separator, a condenser, a steam generator, an economizer, a subcooler and an oil cooler which are connected through pipelines; it is characterized in that a plurality of circulating pipeline systems are formed in the high-temperature steam unit,
the system comprises a refrigerant circulating pipeline system, wherein an evaporator, a high-temperature compressor oil separator, a condenser, an economizer and a subcooler are connected in series through pipelines to form a closed loop, the loop is a loop in which a refrigerant circularly flows, and a throttling mechanism, namely an expansion valve, is arranged on the loop; a return heat exchange pipeline is arranged at the economizer and comprises two sections of pipelines, wherein one section of pipeline is used for communicating the economizer with a pipeline from the economizer to the subcooler, and is provided with an electromagnetic valve and an expansion valve, namely a tee joint is arranged on the pipeline from the economizer to the subcooler, and the other section of pipeline is used for connecting the economizer with the high-temperature compressor; the economizer is arranged to fully subcool refrigerant liquid to be fed into the evaporator by using a small part of refrigerant liquid, and the refrigerant used for cooling can provide air supplement for the compressor after being evaporated, so that the running energy efficiency of the refrigerating system is improved by improving the total suction capacity of the compressor;
at the high-temperature compressor, refrigerant vapor is compressed to form high-temperature and high-pressure refrigerant gas, and the high-temperature compressor sucks vaporized refrigerant vapor and then compresses the refrigerant vapor, so that a stable refrigeration cycle is formed; the economizer supplies secondary air supply to the high-temperature compressor, and meanwhile, the energy efficiency value of the refrigerating system is greatly improved;
the high-temperature steam generation system is used for connecting the steam generator and the condenser through a pipeline to form a closed high-temperature steam generation loop;
the subcooler waste heat utilization system is characterized in that an evaporator and a subcooler are connected through a water system pipeline to form a waste heat recovery loop, the loop utilizes a water inlet pipe and a water outlet pipe of the evaporator, and a branch pipe is arranged on each of the water inlet pipe and the water outlet pipe of the evaporator and connected with the subcooler; the inlet water used for heat exchange in the evaporator flows out of the evaporator and then enters the subcooler, the inlet water flows into the evaporator again after heat exchange in the subcooler, heat exchange is carried out between the inlet water and the refrigerant flowing through the subcooler in the subcooler, the refrigerant liquid is cooled again, and meanwhile, heat is put into the evaporator;
oil cooler heat transfer system establishes ties oil separator, oil cooler and high temperature compressor through the pipeline, forms lubricating oil circulation pipeline, forms closed loop with evaporimeter and oil cooler intercommunication simultaneously, and this return circuit utilizes the inlet tube and the outlet pipe of evaporimeter, respectively sets up a bleeder connection oil cooler on the inlet tube of evaporimeter and the outlet pipe, and the play water of evaporimeter flows into the evaporimeter after the lubricating oil heat transfer in oil cooler and the oil cooler.
On the basis of the technical scheme, in order to achieve the convenience of use and the stability of equipment, the invention can also make the following improvements on the technical scheme:
furthermore, a pressure maintaining valve is arranged on a pipeline from the high-temperature compressor to the oil separator; a filter is arranged on a pipeline from the condenser to the economizer; an electronic expansion valve is arranged on a pipeline from the subcooler to the evaporator; a filter is provided in a line from the oil separator to the oil cooler. The filter is used for filtering impurities in the liquid.
Furthermore, a hot water circulating pump is arranged on a pipeline from the steam generator to the condenser, a water supplementing pipeline is arranged on the pipeline, a water supplementing pump is arranged on the water supplementing pipeline, and part of high-temperature system water in the steam generator is output as hot steam, so that the system water is supplemented with the supplementing water when the system water flows back to the condenser from the steam generator, and the temperature of the supplementing water is not lower than 50 ℃.
Furthermore, a stop valve is arranged on a pipeline from the condenser to the economizer; a stop valve is arranged on a pipeline from the subcooler to the evaporator; a shut-off valve is provided in the line from the oil separator to the oil cooler.
Furthermore, the evaporator is a shell-and-tube evaporator which can efficiently absorb the heat of water at 50 ℃ to evaporate the refrigerant; the high-temperature compressor can realize the condensation temperature of more than 120 ℃; the oil separator is a high-efficiency oil separator with the separation efficiency of more than 99.5 percent; the condenser is a high-efficiency shell-and-tube condenser capable of realizing the water outlet temperature of 120 ℃.
Furthermore, a water inlet pipe of the evaporator is provided with a throttling mechanism which can meet the requirement of liquid supply temperature of 50 ℃.
Meanwhile, the method for producing high-temperature steam by the high-temperature steam generator set provided by the technical scheme comprises the following steps:
the method for producing high-temperature steam by using the high-temperature steam unit is characterized in that the high-temperature steam is produced by the steam unit.
Further, the generation of hot steam at temperatures exceeding 100 ℃ by the steam generator system is achieved by:
inputting heat exchange inlet water with the temperature not lower than 50 ℃ into an evaporator, exchanging heat with liquid refrigerant in the evaporator and then flowing out of the evaporator, sucking the refrigerant in the evaporator by a high-temperature compressor, compressing the refrigerant to ensure that the temperature of the refrigerant is not lower than 125 ℃, discharging the refrigerant gas into an oil separator, separating the refrigerant from the oil by the oil separator, feeding the separated high-pressure refrigerant gas with the temperature not lower than 120 ℃ into a condenser, carrying out high-efficiency heat exchange with high-temperature circulating water in the condenser, heating the high-temperature circulating water to be not lower than 120 ℃, then injecting the high-temperature circulating water into a steam generator by a high-temperature hot water pump, reducing the pressure of the high-temperature circulating water not lower than the temperature in the steam generator for vaporization, outputting part of the high-temperature circulating water in the form of hot steam, enabling part of the high-temperature hot water to be in, the high-temperature hot water flowing back to the condenser exchanges heat with high-temperature refrigerant gas again to form hot water with the temperature not lower than 120 ℃;
refrigerant gas flows out of the condenser after being subjected to heat exchange in the condenser, flows to the economizer, flows to the subcooler after passing through the economizer, then flows back to the evaporator, and enters the next cycle; after part of the refrigerant flows out of the economizer, the refrigerant flows back to the economizer through a refrigerant return pipeline and then flows to a high-temperature compressor, and when the refrigerant flows back to the economizer, the refrigerant passes through an electromagnetic valve and an expansion valve arranged on the pipeline;
at the evaporator, after primary water inflow, controlling the heat exchange inlet water to circularly flow between the evaporator and the subcooler, and exchanging heat by using a refrigerant flowing in the subcooler;
after being compressed by the high-temperature compressor, the refrigerant is discharged to the oil separator, the high-temperature lubricating oil separated from the oil separator flows to the oil cooler, meanwhile, the part of the water outlet of the evaporator flows to the oil cooler to form heat exchange with the high-temperature lubricating oil in the oil cooler, and the high-temperature lubricating oil is cooled and then flows back to the high-temperature compressor; and when the temperature of the high-temperature lubricating oil is lower than 80 ℃, closing the electromagnetic valve between the oil cooler and the water inlet pipe of the condenser, and stopping the heat exchange between the high-temperature lubricating oil and the water outlet of the condenser.
Furthermore, a single-component novel refrigerant is used in the high-temperature steam unit.
Further, the refrigerant is an R245fa type environment-friendly refrigerant.
The invention has the advantages that: the unit designed by the invention can solve the problems of complexity, complex water system configuration and the like of the existing refrigerating system, and can realize saturated steam with the temperature of a steam outlet close to 120 ℃;
the system is provided with the steam generator, steam with the temperature close to 120 ℃ can be directly produced on a prying unit, and long-term stable steam output can be realized when the temperature of the heat source water is basically stable;
the system is particularly suitable for enterprises or places with abundant resources such as waste heat and waste heat, obtains a heat source with higher grade while reducing emission pollution, and is more in accordance with energy environment policies of energy conservation, environmental protection and sustainable development advocated by the state at present.
Drawings
Fig. 1 is a schematic structural diagram of a high-temperature steam unit according to the present application.
The reference numbers are recorded as follows: 1-evaporator, 2-high temperature compressor, 3-oil separator, 4-condenser, 5-steam generator, 6-economizer, 7-subcooler and 8-oil cooler; 9-filter, 10-pressure maintaining valve.
Detailed Description
The principles and features of this invention are described below in conjunction with the following drawings, which are set forth by way of illustration only and are not intended to limit the scope of the invention.
A high-temperature steam unit (see figure 1) comprises an evaporator 1, a high-temperature compressor 2, an oil separator 3, a condenser 4, a steam generator 5, an economizer 6, a subcooler 7 and an oil cooler 8 which are connected through pipelines;
the system comprises a refrigerant circulating pipeline system, wherein an evaporator 1, a high-temperature compressor 2, an oil separator 3, a condenser 4, an economizer 6 and a subcooler 7 are connected in series through pipelines to form a closed loop, and the loop is a loop in which a refrigerant flows; a return heat exchange pipeline is arranged at the economizer 6 and comprises two sections of pipelines, wherein one section of pipeline is used for communicating the economizer 6 with the pipeline from the economizer 6 to the subcooler 7, an electromagnetic valve and an expansion valve are arranged on the section of pipeline, and the other section of pipeline is used for connecting the economizer 6 with the high-temperature compressor 2;
the high-temperature steam generation system is used for connecting the steam generator 5 and the condenser 4 through a pipeline to form a closed high-temperature steam generation loop;
the subcooler waste heat utilization system is characterized in that the evaporator 1 and the subcooler 7 are connected through a pipeline to form a waste heat recovery loop, the loop utilizes a water inlet pipe and a water outlet pipe of the evaporator 1, and a branch pipe is respectively arranged on the water inlet pipe and the water outlet pipe of the evaporator 1 and is connected with the subcooler 7;
the oil cooler heat exchange system is characterized in that the oil separator 3, the oil cooler 8 and the high-temperature compressor 2 are connected in series through pipelines to form a lubricating oil circulation pipeline, the evaporator 1 and the oil cooler 8 are communicated to form a closed loop, the loop utilizes a water inlet pipe and a water outlet pipe of the evaporator 1, and a branch pipe is arranged on the water inlet pipe and the water outlet pipe of the evaporator 1 and connected with the oil cooler 8;
wherein, a pressure maintaining valve 10 is arranged on a pipeline from the high-temperature compressor 2 to the oil separator 3; a filter 9 is arranged on a pipeline from the condenser 4 to the economizer 6; an electronic expansion valve 11 is arranged on a pipeline from the subcooler 7 to the evaporator 1; a filter is arranged on a pipeline from the oil separator 3 to the oil cooler 8;
a hot water circulating pump is arranged on a pipeline from the steam generator 5 to the condenser 4, a water replenishing pipeline is arranged on the pipeline, and a water replenishing pump is arranged on the water replenishing pipeline;
a stop valve is arranged on a pipeline from the condenser 4 to the economizer 6; a stop valve is arranged on a pipeline from the subcooler 7 to the evaporator 1; a stop valve is arranged on a pipeline from the oil separator 3 to the oil cooler 8;
the evaporator 1 is a shell-and-tube evaporator which can efficiently absorb the heat of water at 50 ℃ to evaporate a refrigerant; the high-temperature compressor 2 is a high-temperature compressor capable of realizing the condensation temperature of more than 120 ℃; the oil separator 3 is a high-efficiency oil separator with the separation efficiency of more than 99.5 percent; the condenser 4 is a high-efficiency shell-and-tube condenser capable of realizing the water outlet temperature of 120 ℃;
the water inlet pipe of the evaporator 1 is provided with a throttling mechanism which can meet the requirement of liquid supply temperature of 50 ℃.
By the high-temperature steam unit, the steam unit produces high-temperature steam with the temperature not lower than 100 ℃ by the following method:
inputting heat exchange inlet water with the temperature of not less than 50 ℃ into an evaporator 1, performing heat exchange with a liquid refrigerant in the evaporator 1, then flowing out of the evaporator 1, sucking the refrigerant in the evaporator 1 from a high-temperature compressor 2, compressing the refrigerant to ensure that the temperature of the refrigerant is not less than 125 ℃, discharging the refrigerant gas into an oil separator 3, separating the refrigerant from the oil by the oil separator 3, introducing the separated high-pressure refrigerant gas with the temperature of not less than 125 ℃ into a condenser 4, performing high-efficiency heat exchange with high-temperature circulating water in the condenser 4, heating the high-temperature circulating water to not less than 120 ℃, then injecting the high-temperature circulating water into a steam generator 5 through a high-temperature hot water pump, depressurizing and vaporizing the high-temperature circulating water with the temperature of not less than 120 ℃ in the steam generator 5, outputting part of the high-temperature circulating water in the form of hot steam, wherein the, part of the high-temperature hot water is in a liquid state and flows out of the steam generator 5, the high-temperature hot water is conveyed to the condenser 4 by the hot water circulating pump, and the high-temperature hot water flowing back to the condenser 4 exchanges heat with high-temperature refrigerant gas again to form hot water with the temperature not lower than 120 ℃;
refrigerant gas flows out of the condenser after being subjected to heat exchange in the condenser 4 and flows to the economizer 6, flows to the subcooler 7 after passing through the economizer 6, then flows back to the evaporator 1, and enters the next cycle; after part of the refrigerant flows out of the economizer 6, the refrigerant flows back to the economizer 6 through a refrigerant return pipeline and then flows to the high-temperature compressor 2, the refrigerant flows through an electromagnetic valve and an expansion valve arranged on the pipeline when flowing back to the economizer 6, refrigerant gas is subjected to phase change when passing through the expansion valve, the refrigerant subjected to phase change is subjected to heat exchange with refrigerant quality inspection in the economizer, the temperature of the refrigerant flowing to the economizer from a condenser is reduced, and the temperature of the refrigerant flowing to the high-temperature compressor from the economizer is increased;
after water is fed for the first time in the evaporator 1, controlling the inflow water for heat exchange to circularly flow between the evaporator 1 and the subcooler 7, exchanging heat by using a refrigerant flowing in the subcooler 7, wherein the temperature of the refrigerant flowing to the subcooler is about 80 ℃, and after heat exchange in the refrigerator, the temperature is reduced to 55-60 ℃, and the refrigerant with the temperature can be used on a pipeline by using an electronic expansion valve which has better controllability and can not be used without a system using the subcooler; after heat exchange is carried out on the outlet water of the evaporator in the subcooler, the temperature is raised from about 45 ℃ to about 50 ℃ to form the temperature which is in accordance with the inlet water of the evaporator;
after being compressed by the high-temperature compressor 2, the refrigerant is discharged to the oil separator 3, the high-temperature lubricating oil separated from the oil separator 3 flows to the oil cooler 8, meanwhile, the water outlet part of the evaporator 1 flows to the oil cooler 8 to form heat exchange with the high-temperature lubricating oil in the oil cooler 8, and the high-temperature lubricating oil is cooled and then flows back to the high-temperature compressor 2; when the temperature of the high-temperature lubricating oil is lower than 80 ℃, closing the electromagnetic valve between the oil cooler 8 and the water inlet pipe of the condenser 4, and stopping the heat exchange between the high-temperature lubricating oil and the water outlet of the condenser 4;
wherein, a single-component novel refrigerant is used in the high-temperature steam unit;
the refrigerant is preferably an environment-friendly refrigerant of the R245fa type.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents, improvements and the like that fall within the spirit and principle of the present invention are intended to be included therein.

Claims (10)

1. A high-temperature steam unit comprises an evaporator (1), a high-temperature compressor (2), an oil separator (3), a condenser (4), a steam generator (5), an economizer (6), a subcooler (7) and an oil cooler (8) which are connected through pipelines; it is characterized in that the preparation method is characterized in that,
the system comprises a refrigerant circulating pipeline system, wherein an evaporator (1), a high-temperature compressor (2), an oil separator (3), a condenser (4), an economizer (6) and a subcooler (7) are connected in series through pipelines to form a closed loop, and the loop is a loop in which refrigerant flows; a return heat exchange pipeline is arranged at the economizer (6), the return heat exchange pipeline comprises two sections of pipelines, one section of pipeline is used for communicating the economizer (6) with the pipeline from the economizer (6) to the subcooler (7), an electromagnetic valve and an expansion valve are arranged on the section of pipeline, and the other section of pipeline is used for connecting the economizer (6) with the high-temperature compressor (2);
the high-temperature steam generating system is used for connecting the steam generator (5) and the condenser (4) through a pipeline to form a closed high-temperature steam generating loop;
the subcooler waste heat utilization system is characterized in that an evaporator (1) and a subcooler (7) are connected through a pipeline to form a waste heat recovery loop, the loop utilizes a water inlet pipe and a water outlet pipe of the evaporator (1), and a branch pipe is arranged on each of the water inlet pipe and the water outlet pipe of the evaporator (1) and is connected with the subcooler (7);
oil cooler heat transfer system establishes ties oil separator (3), oil cooler (8) and high temperature compressor (2) through the pipeline, forms lubricating oil circulation pipeline, forms closed circuit with evaporimeter (1) and oil cooler (8) intercommunication simultaneously, and this return circuit utilizes the inlet tube and the outlet pipe of evaporimeter (1), respectively sets up a bleeder line connection oil cooler (8) on the inlet tube of evaporimeter (1) and the outlet pipe.
2. A high-temperature steam unit according to claim 1, characterized in that a pressure maintaining valve (10) is arranged on the pipeline from the high-temperature compressor (2) to the oil separator (3); a filter (9) is arranged on a pipeline from the condenser (4) to the economizer (6); an electronic expansion valve (11) is arranged on a pipeline from the subcooler (7) to the evaporator (1); a filter is provided in a line from the oil separator (3) to the oil cooler (8).
3. A high-temperature steam unit according to claim 1, characterized in that a hot water circulating pump is arranged on the pipeline from the steam generator (5) to the condenser (4), and a water replenishing pipeline is arranged on the pipeline, and a water replenishing pump is arranged on the water replenishing pipeline.
4. A high temperature steam unit according to claim 1, characterised in that a shut-off valve is provided in the line from the condenser (4) to the economizer (6); a stop valve is arranged on a pipeline from the subcooler (7) to the evaporator (1); a shut-off valve is arranged in the line from the oil separator (3) to the oil cooler (8).
5. A high-temperature steam unit according to claim 1, characterized in that the evaporator (1) is a shell-and-tube evaporator capable of efficiently absorbing heat of water at 50 ℃ to evaporate refrigerant; the high-temperature compressor (2) can realize the condensation temperature of more than 120 ℃; the oil separator (3) is a high-efficiency oil separator with the separation efficiency of more than 99.5 percent; the condenser (4) is a high-efficiency shell-and-tube condenser capable of realizing the water outlet temperature of 120 ℃.
6. A high-temperature steam unit according to claim 1, characterized in that the water inlet pipe of the evaporator (1) is provided with a throttle mechanism capable of meeting the liquid supply temperature of 50 ℃.
7. A method for producing high-temperature steam by using a high-temperature steam unit, characterized in that the high-temperature steam is produced by using a steam unit according to any one of claims 1 to 3.
8. Method for producing high-temperature steam with a high-temperature steam unit according to claim 7, characterized in that the generation of hot steam of more than 100 ℃ by means of a steam generator system is achieved by:
inputting heat exchange inlet water with the temperature not lower than 50 ℃ into an evaporator (1), exchanging heat with a liquid refrigerant in the evaporator (1) and then flowing out of the evaporator (1), after the refrigerant in the evaporator (1) is sucked by a high-temperature compressor (2) from the evaporator (1), compressing the refrigerant to ensure that the temperature of the refrigerant is not lower than 125 ℃ high-temperature high-pressure refrigerant gas, discharging the refrigerant gas into an oil separator (3), separating the refrigerant from oil by the oil separator (3), introducing the separated high-pressure refrigerant gas with the temperature not lower than 125 ℃ into a condenser (4), performing high-efficiency heat exchange with high-temperature circulating water in the condenser (4), heating the high-temperature circulating water to be not lower than 120 ℃, then injecting the high-temperature circulating water into a steam generator (5) through a high-temperature hot water pump, and depressurizing and vaporizing the high-temperature circulating water with the temperature not lower than 120 ℃ in the, part of the hot water is output in the form of hot steam, part of the high-temperature hot water is in a liquid state and flows out of the steam generator (5), the liquid is conveyed to the condenser (4) by a hot water circulating pump, and the high-temperature hot water flowing back to the condenser (4) exchanges heat with high-temperature refrigerant gas again to form hot water with the temperature of not lower than 120 ℃;
refrigerant gas flows out of the condenser after being subjected to heat exchange in the condenser (4), flows to the economizer (6), flows to the subcooler (7) after passing through the economizer (6), then flows back to the evaporator (1) and enters the next cycle; wherein, part of the refrigerant flows out of the economizer (6), then flows back to the economizer (6) through a refrigerant return pipeline and then flows to the high-temperature compressor (2), and the refrigerant passes through an electromagnetic valve and an expansion valve arranged on the pipeline when flowing back to the economizer (6);
after primary water inflow is carried out at the evaporator (1), controlling inflow water for heat exchange to circularly flow between the evaporator (1) and the subcooler (7), and carrying out heat exchange by using a refrigerant flowing in the subcooler (7) when the inflow water is in the subcooler (7);
after being compressed (2) by the high-temperature compressor, the refrigerant is discharged to the oil separator (3), the high-temperature lubricating oil separated from the oil separator (3) flows to the oil cooler (8), meanwhile, the water outlet part of the evaporator (1) flows to the oil cooler (8) to exchange heat with the high-temperature lubricating oil in the oil cooler (8), and the high-temperature lubricating oil is cooled and then flows back to the high-temperature compressor (2); when the temperature of the high-temperature lubricating oil is lower than 80 ℃, the electromagnetic valve between the oil cooler (8) and the water inlet pipe of the condenser (4) is closed, and the heat exchange between the high-temperature lubricating oil and the water outlet of the condenser (4) is stopped.
9. The method of claim 8, wherein a single component of the novel refrigerant is used in the high temperature steam generation unit.
10. A method of producing high temperature steam using a high temperature steam plant as recited in claim 9 wherein said refrigerant is an R245fa type environmentally friendly refrigerant.
CN202010513265.7A 2020-06-08 2020-06-08 High-temperature steam unit and method for producing high-temperature steam by using same Pending CN111520693A (en)

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN113028679A (en) * 2021-04-26 2021-06-25 中国科学院理化技术研究所 Waste heat recovery heat pump system

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN113028679A (en) * 2021-04-26 2021-06-25 中国科学院理化技术研究所 Waste heat recovery heat pump system

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