CN115727567B - Multi-mode multi-working-medium waste heat recovery steam-making high-temperature heat pump device - Google Patents
Multi-mode multi-working-medium waste heat recovery steam-making high-temperature heat pump device Download PDFInfo
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- 239000002918 waste heat Substances 0.000 title claims abstract description 28
- 238000011084 recovery Methods 0.000 title claims abstract description 20
- 238000007906 compression Methods 0.000 claims abstract description 57
- 230000006835 compression Effects 0.000 claims abstract description 56
- 238000001704 evaporation Methods 0.000 claims abstract description 31
- 230000008020 evaporation Effects 0.000 claims abstract description 30
- 230000001502 supplementing effect Effects 0.000 claims abstract description 29
- 239000003507 refrigerant Substances 0.000 claims description 133
- 239000007788 liquid Substances 0.000 claims description 43
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 40
- 239000010842 industrial wastewater Substances 0.000 claims description 20
- 238000003860 storage Methods 0.000 claims description 9
- 239000007789 gas Substances 0.000 claims description 3
- 239000000203 mixture Substances 0.000 claims description 3
- 238000010438 heat treatment Methods 0.000 abstract description 30
- 230000000694 effects Effects 0.000 abstract description 2
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- 239000002440 industrial waste Substances 0.000 description 5
- 238000010521 absorption reaction Methods 0.000 description 4
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- 230000007613 environmental effect Effects 0.000 description 2
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Abstract
The invention discloses a high-temperature heat pump device for preparing steam by multi-mode multi-working-medium waste heat recovery, which relates to the technical field of heat pump steam engines for energy reuse and comprises a compression system, a steam generation system for preparing steam, an intermediate air supplementing system and an evaporation system for waste heat recovery, wherein the compression system can be changed along with the working condition of the system; the system is divided into a common energy efficiency low-temperature mode, a common energy efficiency high-temperature mode and a high-energy efficiency mode according to different working conditions, and the compression system comprises a first compressor, a second compressor and a third compressor; the electronic two-way valve I, the electronic two-way valve II and the electronic two-way valve III are formed; the electronic two-way valve can be switched on and off according to working conditions; tee joint two c, tee joint three e; the four-way joint A, the three-way joint B and the four-way joint D are connected through the connecting pipelines, so that the technical problem that the traditional heat pump system only provides a single heating temperature and can not change the heating effect according to the environment and the requirements is solved.
Description
Technical Field
The invention relates to the technical field of heat pump steam engines for recycling energy, in particular to a multi-mode multi-working-medium waste heat recovery steam-making high-temperature heat pump device.
Background
As is known from the investigation of various industrial departments, the temperature required in the ceramic industry, leather products, rubber products, chemical industry, pulp processing, wood processing, fiber processing and food tobacco industry is mostly above 100 ℃, the condensation temperature is 60-140 ℃ and above, especially, the low-grade heat energy utilization aspects such as geothermal energy, solar energy and industrial waste heat are particularly prominent, the application scene of the low-grade heat energy utilization device can be widely divided into commercial residential buildings (heating, hot water supply, cold-hot air conditioning and hot air drying) and industrial utilization (oil field crude oil heating and gathering, chemical process high-temperature steam heat pump technology, sewage heat recycling, sea water desalination technology application and high-temperature heat pump drying technology), according to the investigation, the waste heat total resource of various industries accounts for about 17% -67% of the total fuel consumption amount of the waste heat resource, the waste heat resource of the recyclable industries is about 60% of the waste heat total resource, and the steam is usually prepared by adopting an electric steam generator, tap water is continuously heated by introducing the tap water into the electric steam boiler to form steam, the temperature difference existing in the prior art, the steam and the tap water tends to exist in a large temperature, the electric steam generator needs a large amount and the high power consumption time and the high-temperature heat pump has high power consumption, the high-efficiency and high-temperature heat pump has good high-efficiency and high-performance coefficient and high-grade heat pump preparation efficiency, and high-grade heat pump has good application prospect.
The research is still carried out on the traditional heat pump system under the working condition with a large pressure ratio, the performance parameters such as isentropic efficiency, volumetric efficiency and the like of the compressor in the heat pump system under the working condition with a large pressure ratio are found to be lower, the heating performance of the system is not ideal, meanwhile, the performance parameters such as isentropic efficiency, volumetric efficiency and the like of the compressor in the heat pump system under the working condition with a large pressure ratio are lower, the heating performance of the system is not ideal, the problem that the phenomenon of liquid impact of the compressor easily occurs in the working process by adopting a refrigerant is solved, and the traditional heat pump technology needs the system to operate at higher condensing temperature and pressure when facing high heating temperature, so that the pressure ratio of the compressor is increased and the reliability of the system is reduced; meanwhile, under the condition of large temperature span, the heat transfer irreversible loss of the condenser can be increased due to the fact that the heat transfer temperature difference of the condenser is too large, and the overall performance of the system is reduced, namely the existing device cannot meet the energy conversion of low evaporation temperature and high condensation temperature, namely a heat source with lower temperature cannot be used for preparing hot water and steam with higher temperature, meanwhile, the efficiency and heating performance of the compressor are not high, and the requirements of industrial production, life and the like cannot be met.
The traditional single-stage compression heat pump low-temperature working condition is that the volume of the suction ratio is increased due to the overlarge compression ratio along with the increase of the condensation temperature, the refrigerant mass flow of a refrigerating system is reduced, the heating capacity of the system is reduced, the isentropic coefficient is greatly reduced, the heating coefficient is reduced, and the use of the system in cold areas is limited, so that an auxiliary equipment economizer is added in the system, the air supplementing capacity is maximized, the temperature of a refrigerant entering an evaporator is kept at the lowest state, the evaporation capacity is increased, the energy efficiency ratio is improved to 15-20% particularly in the ultralow temperature state, the energy efficiency ratio is more energy-saving than that of a common compressor when the compressor operates at the low temperature, the heating effect is better, the traditional heat pump technology uses two-stage compression working medium in some working conditions, but uses a single working medium, the system has the advantages that the system has higher condensing temperature and pressure, the pressure ratio of the compressor is increased, the reliability of the system is reduced, in addition, when the traditional heat pump system spans at a large temperature, the heat transfer temperature difference of the condenser is too large, the overall performance of the system can be reduced, the heating performance of the system can not be adjusted according to the required heat, a self-overlapping circulation system of a non-azeotropic mixed working medium is adopted, the exhaust pressure is low, the pressure ratio is small, the stability is good, wherein the temperature sliding of the non-azeotropic mixed working medium is matched with the temperature change of a cold source and a heat source, the pressure ratio can be reduced, the refrigerating capacity is improved, isothermal circulation can be realized, the power consumption is reduced, the heating performance coefficient is improved, and the traditional heat pump system only has the most performance under specific working conditions and can not adapt to the heating performance requirements of different environmental working conditions.
Disclosure of Invention
The invention aims to provide a multi-mode multi-working-medium waste heat recovery steam-making high-temperature heat pump device, which solves the existing technical problems.
In order to achieve the above purpose, the present invention provides the following technical solutions: a multi-mode multi-working medium waste heat recovery steam-making high-temperature heat pump device comprises a compression system, a steam generation system, an intermediate air supplementing system and a waste heat recovery and utilization evaporation system, wherein the compression system can be changed along with the working condition of the system; the system is divided into a common energy efficiency low-temperature mode, a common energy efficiency high-temperature mode and a high-energy efficiency mode according to different working conditions, and the compression system is connected in the following manner:
The compression system comprises a first compressor, a second compressor and a third compressor; the electronic two-way valve I, the electronic two-way valve II and the electronic two-way valve III are formed; the electronic two-way valve can be switched on and off according to working conditions; tee joint two c, tee joint three e; the four-way joint A, the three-way joint B and the four-way joint D are connected through a pipeline;
Compression system connection mode: the first four-way joint a and the second four-way joint d are divided into a left part, a right part, an upper part and a lower part, the second three-way joint c is divided into a right part, an upper part and a lower part, and the third three-way joint e is divided into a left part, an upper part and a lower part;
The left side of the four-way joint A is connected with the right side of the electronic two-way valve A, the right side of the four-way joint A is connected with the air inlet of the compressor III, the upper side of the four-way joint A is connected with the air inlet of the lower side of the compressor II, the lower side of the four-way joint A is connected with the right side of the three-way joint B, the upper side of the three-way joint B is connected with the air inlet of the lower side of the compressor I, the lower side of the electronic two-way valve B is connected with the left side of the three-way joint B, the upper side of the electronic two-way valve A is connected with the upper side of the four-way joint D, the upper side of the four-way joint D is connected with the air outlet of the upper side of the compressor III, the right side of the four-way joint D is connected with the left side of the electronic two-way valve III, the left side of the four-way joint D is connected with the right side of the three-way joint C, the left side of the electronic two-way valve III is connected with the right side of the three-way joint B, and the right side of the electronic two-way valve III is connected with the middle air outlet of the middle air supplementing system;
The right side of the second three-way joint c is connected with the left side of the second four-way joint d; the lower edge of the second tee joint c is connected with an exhaust port above the second compressor; the upper edge of the three-way joint II c is connected with the lower edge of the electronic two-way valve II, and the lower edge of the electronic two-way valve II is connected with the upper edge of the three-way joint II c; the lower side of the upper three-way joint three e of the second electronic two-way valve is connected with the upper side of the second electronic two-way valve; the upper edge of the three-way joint three e is connected with the inlet of the evaporator of the steam generation system; the left side of the three-way joint three e is connected with an air outlet above the first compressor.
Preferably, the working modes of the compression system are divided into two switching modes according to the working modes:
the working modes and the connection of the compression system in the common energy-efficiency low-temperature mode and the high-energy-efficiency mode are as follows:
the second electronic two-way valve and the third electronic two-way valve of the compression system are closed and the other electronic two-way valves are opened under the common energy efficiency low-temperature mode and the high-energy efficiency mode;
The air inlets of the second compressor and the third compressor are connected with the right side of the first four-way joint a; the air outlets of the second compressor and the third compressor are connected with the left side through the lower side of the fourth joint d to form a first-stage compression system with air supplementing branches for supplementing air, the evaporation system enters the second compressor and the third compressor through the first four-way joint a to be compressed into a refrigerant under the middle pressure respectively, then enters the second four-way joint d and the third electronic two-way valve, the refrigerant is mixed with the second four-way joint d and then enters the left side of the first three-way joint b through the first electronic two-way valve, the right side of the first three-way joint b is short-circuited because the fourth electronic two-way valve is closed, and the refrigerant enters the first condenser of the steam generator system from the upper side of the first three-way joint b to be compressed into a refrigerant with high temperature and high pressure by two stages;
The working mode and connection of the compression system under the common energy efficiency high temperature mode are as follows:
The first electronic two-way valve and the third electronic two-way valve of the compression system are closed and the other electronic two-way valves are opened in a common energy efficiency high-temperature mode;
The air inlets of the second compressor and the third compressor are connected with the right side of the first four-way joint a; an air inlet at the lower part of the compressor is connected with an electronic two-way valve four through a three-way joint one b and is connected with the left side of the four-way joint one a, so that the air inlets at the lower parts of the compressor two and the compressor three are connected with an air inlet at the lower part of the compressor; the air outlets of the second compressor and the third compressor are connected with the left side through the lower side of the four-way joint II, and the electronic two-way valve III is closed, so that no air supplementing mixture exists; after the evaporation system is divided into three paths by a four-way joint and enters a first compressor, a second compressor and a third compressor to be compressed into high-temperature and high-pressure refrigerant respectively; the refrigerant discharged by the compressor III enters the four-way joint II d, and the upper edge and the right edge of the four-way joint II d are open-circuited because the electronic two-way valve I and the electronic two-way valve III are closed; therefore, the refrigerant compressed by the compressor III can only reach the right of the tee joint II c through the left of the four-way joint II d, and then enter the electronic two-way valve II to enter the tee joint II to be compressed with the refrigerant compressed by the compressor I and then enter the tee joint III e from the left of the tee joint III e to be mixed, and the high-temperature and high-pressure refrigerant enters the first condenser of the steam generator system.
Preferably, the steam mode system water route consists of a gas-liquid separator, a water supply channel, a water pump I, a second heat exchanger, a first heat exchanger, an air suction valve, an air storage tank and an air release valve;
The connection and working modes of the water channel of the steam mode system are as follows:
The water supply is pumped by a water pump into a left water end inlet of the second heat exchanger to enter the heat exchanger, the water supply fully absorbs heat of the heat exchanger and is discharged from the right of the second heat exchanger to enter the right of the first heat exchanger to exchange heat and secondarily absorb heat, so that steam is formed, the steam is sucked through a suction valve and enters a gas storage tank to be stored, and the steam can be closed through a discharge valve when the water supply needs to be used;
The connection and working modes of the refrigerant paths of the steam mode system are as follows:
The high-temperature and high-pressure refrigerant enters the left side of the first heat exchanger through the upper part of the three-way joint of the compression system to perform secondary heat exchange with the water side, the refrigerant enters the liquid separator A from the gas-liquid separator A from the right side of the first heat exchanger after heat exchange, the refrigerant is divided into gaseous refrigerant and liquid refrigerant, wherein the gaseous refrigerant enters the right side of the second heat exchanger through the liquid separator B to enter the heat exchanger to perform primary heat exchange with the water side, and enters the upper part of the four f of the three-way joint after heat exchange; the liquid refrigerant enters the three-way joint C through the C of the gas-liquid separator.
Preferably, the connection and working modes of the intermediate air supplementing system in the common energy efficiency low-temperature mode are as follows:
The middle air supplementing system in the common energy efficiency low-temperature mode consists of a middle heat exchanger, a first electronic expansion valve, a second electronic expansion valve, a first electronic three-way valve and a second electronic three-way valve; wherein A, B, C of the electronic three-way valve II is closed, and the electronic two-way valve III is closed;
The refrigerant subjected to heat exchange by the second heat exchanger enters a three-way joint four f through the upper part of the three-way joint four f, the right side of the three-way joint four f is connected with an opening A of an electronic three-way valve II, and is open-circuited because of the closing of the opening A, the refrigerant enters the A of the electronic three-way valve I through the lower part of the three-way joint four f and enters the three-way valve C after coming out of a gas-liquid separator, is mixed in the three-way valve, flows out of the B of the three-way valve into the middle heat exchanger, enters the five g of the three-way joint from the right side of the five g of the three-way joint, flows out of the five g of the three-way joint, enters the right inlet of an evaporator of the evaporation system after being throttled and depressurized by the first expansion valve;
The connection and working modes of the middle air supplementing system in the common energy efficiency high temperature mode are as follows:
The electronic three-way valve A of the intermediate air supplementing system is closed under the common energy efficiency low-temperature mode;
the refrigerant subjected to heat exchange by the second heat exchanger enters a three-way joint four f through the upper part of the three-way joint four f, the right side of the three-way joint four f is connected with an A port of an electronic three-way valve II, and the A port is closed, so that the right side of the three-way joint four f is open, the refrigerant enters the A port of the electronic three-way valve I through the lower part of the three-way joint four f, is mixed with the refrigerant entering the C port of the gas-liquid separator after coming out of the C port of the electronic three-way valve I, flows out of the B port of the electronic three-way valve I, enters the five g port of the three-way joint five g after entering the middle heat exchanger and exchanging heat with the refrigerant of the other side air supplementing branch, and is divided into an upper branch and a lower branch through the five g port of the three-way joint; the branch above the three-way joint five g enters C through C of the electronic three-way valve II, flows out from B of the electronic three-way valve II, enters a second expansion valve for throttling and reducing pressure, exchanges heat with the refrigerant entering the intermediate heat exchanger and the other path, enters the left side of the electronic two-way valve III, flows into the electronic two-way valve III, enters the four-way joint II d from the right side of the electronic two-way valve III, and enters a compression system for air supplementing; and then the refrigerant flowing out from the five g lower part of the three-way joint enters the first expansion valve for throttling and depressurization and flows into the right inlet of the evaporator of the evaporation system.
The evaporation system consists of an industrial wastewater supply and evaporator, a water pump II and an industrial wastewater centralized treatment area;
The waterway part is connected with the working mode that the industrial wastewater is sucked into the evaporator by the second water pump and is discharged into the industrial wastewater centralized treatment area after being heated by the refrigerant of the other evaporation system, and is discharged after being treated to reach the discharge standard.
The refrigerant path part of the evaporation system is connected and works in the following way; the refrigerant after throttling and depressurization through the first expansion valve enters an evaporator of the evaporation system, and the refrigerant entering the evaporation system absorbs the waste heat of industrial wastewater at the other end; the refrigerant becomes low-pressure superheated refrigerant steam, and then enters the four-way joint A and then enters the compression system for compression.
Compared with the related art, the multi-mode multi-working-medium waste heat recovery steam-making high-temperature heat pump device provided by the invention has the following beneficial effects:
The invention provides a multi-mode multi-working-medium waste heat recovery steam-making high-temperature heat pump device, wherein a system can be switched into three modes according to working conditions to make steam, namely, a common energy efficiency low-temperature mode, a common energy efficiency high-temperature mode and a high energy efficiency mode, and can be switched into corresponding modes according to energy-saving requirements and working conditions to make steam with the temperature of more than 100 ℃; and the system can realize mode switching through switching of the valve, and meanwhile, the compressor can also realize the mutual switching between primary compression and secondary compression, so that the heating coefficient and the heating efficiency are improved.
The invention provides a multi-mode multi-working-medium waste heat recovery steam-making high-temperature heat pump device, which utilizes self-cascade refrigeration circulation and non-azeotropic working media to realize multi-working-medium separated air supplementing high-temperature heat pump circulation, realizes high-efficiency separation of working media, maximum reduction of air supplementing temperature and optimal optimization of compression process under the condition of not sacrificing heating quantity, and improves the heating efficiency and heating efficiency of the device.
The invention provides a multi-mode multi-working medium waste heat recovery steam-making high-temperature heat pump device, which fully utilizes low-grade energy sources to carry out heat recovery on industrial waste water discharged by industrial production seeds, converts the low-grade heat energy into high-grade heat energy, utilizes the industrial waste heat to prepare steam for users to use, greatly improves the utilization rate of energy sources, and can discharge the industrial waste water after treatment, thereby having the concept of environmental protection.
Drawings
FIG. 1 is a schematic structural diagram of a multi-mode multi-working-medium waste heat recovery steam-making high-temperature heat pump device of the invention;
FIG. 2 is a schematic diagram of the structure of the device in the normal energy efficiency low temperature mode of the multi-mode multi-working medium waste heat recovery steam-making high temperature heat pump device of the invention;
FIG. 3 is a schematic diagram of a device in a normal energy efficiency high temperature mode of the multi-mode multi-working medium waste heat recovery steam-making high temperature heat pump device of the present invention;
fig. 4 is a schematic diagram of the structure of the high-energy efficiency mode of the high-temperature heat pump device for producing steam by multi-mode multi-working medium waste heat recovery.
In the figure: 1. a first compressor; 2. a second compressor; 3. a third compressor; 4. a first heat exchanger; 5. a gas-liquid separator; 6. a second heat exchanger; 7. an intermediate heat exchanger; 8. a first expansion valve; 9. a second expansion valve; 10. an evaporator; 11. an air suction valve; 12. a gas storage tank; 13. a bleed valve; 14. a first water pump; 15. an electronic three-way valve I; 16. an electronic three-way valve II; 17. an electronic two-way valve I; 18 electronic two-way valve two; 19. an electronic two-way valve III; 20. an electronic two-way valve IV; 21. an industrial wastewater centralized treatment area; 22. a second water pump; b. a tee joint I; c. a tee joint II; e. three-way joint III; f. a tee joint IV; g. a tee joint five; a. a first four-way joint; d. and a second four-way joint.
Detailed Description
The following description of the embodiments of the present invention will be made clearly and fully with reference to the accompanying drawings, in which it is evident that the embodiments described are only some, but not all embodiments of the invention; all other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
Embodiment one:
Referring to fig. 1-2, the present invention provides a technical solution, including a compression system capable of changing with the working conditions of the system, a steam generating system for preparing steam, an intermediate air supplementing system, and an evaporation system for recovering and utilizing waste heat; the system is divided into a common energy efficiency low-temperature mode, a common energy efficiency high-temperature mode and a high-energy efficiency mode according to different working conditions, and the connection mode of the compression system is as follows:
The compression system comprises a first compressor 1, a second compressor 2 and a third compressor 3; the electronic two-way valve I17, the electronic two-way valve II 18 and the electronic two-way valve III 20 are formed; the electronic two-way valve can be switched on and off according to working conditions; tee joint two c, tee joint three e; the four-way joint A, the three-way joint B and the four-way joint D are connected through a pipeline;
Compression system connection mode: the first four-way joint a and the second four-way joint d are divided into a left part, a right part, an upper part and a lower part, the second three-way joint c is divided into a right part, an upper part and a lower part, and the third three-way joint e is divided into a left part, an upper part and a lower part;
The left side of the four-way joint A is connected with the right side of the electronic two-way valve IV 20, the right side of the four-way joint A is connected with the air inlet of the compressor III 3, the upper side of the four-way joint A is connected with the air inlet of the compressor II 2, the lower side of the four-way joint A is connected with the outlet of the evaporator 10 of the evaporation system, the left side of the electronic two-way valve IV 20 is connected with the right side of the three-way joint B, the upper side of the three-way joint B is connected with the lower side of the electronic two-way valve IV 17, the lower side of the electronic two-way valve IV 17 is connected with the left side of the three-way joint B, the upper side of the electronic two-way valve IV 17 is connected with the upper side of the four-way joint II, the lower side of the four-way joint II is connected with the air outlet of the upper side of the compressor III 3, the right side of the four-way joint II is connected with the left side of the electronic two-way valve IV 19, the left side of the four-way joint II is connected with the right side of the three-way joint II c, the left side of the electronic two-way joint IV 19 is connected with the left side of the electronic two-way joint II, and the right side of the electronic two-way valve IV 19 is connected with the middle of the air outlet of the three-way valve IV 7;
The right side of the second three-way joint c is connected with the left side of the second four-way joint d; the lower edge of the second tee joint c is connected with an exhaust port above the second compressor 2; the upper edge of the second three-way joint c is connected with the lower edge of the second electronic two-way valve 18, and the lower edge of the second electronic two-way valve 18 is connected with the upper edge of the second three-way joint c; the lower side of the upper three-way joint three e of the second electronic two-way valve 18 is connected with the upper side of the second electronic two-way valve 18; the upper edge of the three-way joint three e is connected with the inlet of the evaporator of the steam generation system; the left side of the three-way joint three e is connected with the air outlet above the first compressor 1.
In this embodiment: fig. 2 shows a low-temperature heating mode under the ordinary energy efficiency, and based on the original device fig. 1, the channels 16A, 16B and 16C of the first electronic two-way valve 17, the third electronic two-way valve 19 and the second electronic three-way valve 16 and the channels 15A and 15C of the first electronic three-way valve 15 are closed.
The industrial wastewater exchanges heat with the refrigerant in the pipeline through the evaporator 10, after the heat exchange of the evaporator 10, the second water pump 22 works to pump the industrial wastewater into the industrial wastewater centralized treatment area 21 for centralized treatment, and after the treatment reaches the discharge standard, the wastewater reaching the standard is discharged through the drainage pipeline.
The first water suction pump 14 at the water supply position is operated to convey water to the second heat exchanger 6 for heat exchange, the refrigerant side releases heat to heat water side water once, the water absorbs heat, the first heat exchanger 4 is used for heating water side water to prepare steam, and finally the air suction valve 11 is operated to pump the steam into the air storage tank 12 for storage, and the stored steam can be conveyed for use through the opening of the air release valve 13.
In a low-temperature heating mode, the refrigerant absorbs low-grade heat energy of industrial wastewater through the evaporator 10 and then enters a compression end for compression, a four-way joint a entering the compression end is divided into 4 branches of upper, lower, left and right, and the left branch refrigerant of the four-way joint a enters the compressor 1 through an electronic two-way valve four 20 along an air inlet of the compressor 1 to be compressed into high-temperature and high-pressure gaseous refrigerant, and is discharged through an air outlet of the compressor 1; the branch refrigerant above the four-way joint A enters the second compressor 2 through the air inlet of the second compressor 2 to be compressed into high-temperature high-pressure gaseous refrigerant, and is discharged through the air outlet of the second compressor 2; the branch refrigerant on the right side of the four-way joint A enters the compressor III 3 through the air inlet of the compressor III 3 to be compressed into high-temperature high-pressure gaseous refrigerant, the gaseous refrigerant is discharged through the air outlet of the compressor III 3, the gaseous refrigerant discharged through the left branch of the four-way joint and the air outlet of the compressor II 2 is mixed in the three-way joint C and then discharged through the electronic two-way valve II 18, the gaseous refrigerant is mixed with the gaseous refrigerant three-way joint three e discharged through the air outlet of the compressor I1 and then enters the first heat exchanger 4 to exchange heat, the gaseous refrigerant enters the gas-liquid separator 5 through the inlet of the gas-liquid separator 5A, the gaseous refrigerant is discharged from the outlet of the gas-liquid separator 5B to enter the second heat exchanger 6 to exchange heat once, the liquid refrigerant is discharged from the 5C of the gas-liquid separator 5 to enter the electronic three-way valve I15 to be mixed with the refrigerant which is discharged from the air outlet of the second heat exchanger 6 in the electronic three-way valve I15, the mixed refrigerant enters the intermediate heat exchanger 7 to exchange heat after passing through the electronic three-way valve I15B, and finally enters the evaporator 10 to absorb industrial waste heat after being throttled by the first expansion valve 8 to enter the evaporator 10 to enter the compression system to complete the compression system.
Embodiment two:
Referring to fig. 1 and fig. 3, on the basis of the first embodiment, the present invention provides a technical solution: in the common energy efficiency high temperature mode and the high energy efficiency mode, the second electronic two-way valve 18 and the third electronic two-way valve 20 of the compression system are closed, and the other electronic two-way valves are opened;
The air inlets of the second compressor 2 and the third compressor 3 are connected with the right side through the upper side of the first four-way joint a; the air outlets of the second compressor 2 and the third compressor 3 are connected with the left side through the lower side of the fourth joint d to form a first-stage compression system with an air supplementing branch air supplementing under the parallel connection of the two compressors, the first-stage compression system enters the second compressor 2 and the third compressor 3 through the first joint a and is compressed into a refrigerant under the middle pressure respectively, the refrigerant enters the second joint d and the third electronic two-way valve 19, the refrigerant is mixed with the second joint d and enters the left side of the first three-way joint b through the first electronic two-way valve 17, the right side of the first three-way joint b is short-circuited because the fourth electronic two-way valve 20 is closed, and the refrigerant enters the first condenser 4 of the steam generator system from the upper side of the first three-way joint b after the second-stage compression of the refrigerant enters the first compressor 1;
The working mode and connection of the compression system under the common energy efficiency high temperature mode are as follows:
the electronic two-way valve I17 and the electronic two-way valve III 19 of the compression system are closed and the other electronic two-way valves are opened in a common energy efficiency high temperature mode;
The air inlets of the second compressor 2 and the third compressor 3 are connected with the right side through the upper side of the first four-way joint a; the air inlets at the lower parts of the first compressor 1 are connected with the electronic two-way valve four 20 through the three-way joint one b and the electronic two-way valve four 20 is connected with the left side of the four-way joint one a, so that the air inlets at the lower parts of the second compressor 2 and the third compressor 3 are connected with the air inlet at the lower part of the first compressor 1; the air outlets of the second compressor 2 and the third compressor 3 are connected with the left side through the lower side of the four-way joint d, and the electronic two-way valve III 19 is closed, so that no air supplementing mixture exists; after the evaporation system is divided into three paths by a four-way joint and enters a first compressor 1, a second compressor 2 and a third compressor 3 to be respectively compressed into high-temperature and high-pressure refrigerant; the refrigerant discharged by the third compressor 3 enters the second four-way joint d, and the upper edge and the right edge of the second four-way joint d are open-circuited because the first electronic two-way valve 17 and the third electronic two-way valve 19 are closed; therefore, the refrigerant compressed by the third compressor 3 can only reach the right of the second tee joint c through the left side of the second four-way joint d, and then enter the second electronic two-way valve 18 to be compressed with the first compressor 1, and then enter the third tee joint e from the left of the third tee joint e to be mixed with the refrigerant compressed by the second compressor 2, and then enter the first condenser 4 of the steam generator system after the high-temperature and high-pressure refrigerant.
In this embodiment: fig. 3 shows a high-temperature heating mode under the ordinary energy efficiency, and based on the original device fig. 1, the two-way electronic valve 18, the four-way electronic valve 20, the 15A and 15C of the first three-way electronic valve 15 and the 16A port of the two-way electronic valve 16 are closed.
The water supply and the industrial wastewater are treated in the same way as in the first example;
In the high temperature heating mode, the refrigerant is compressed by the compressor after absorbing industrial waste heat by the evaporator 10. At the evaporation end, the refrigerant is divided into an upper branch four-way joint A and a lower branch four-way joint A by a four-way joint A, the left side of the four-way joint A is an open circuit, the refrigerant passing through the branch above the four-way joint A enters a compressor II 2 through an air inlet of the compressor II 2 and is compressed into high-temperature and high-pressure gaseous refrigerant, and then the gaseous refrigerant is discharged through an air outlet of the compressor II 2; the refrigerant on the right of the four-way joint A enters the compressor III 3 through the air inlet of the compressor III 3 to be compressed into high-temperature high-pressure gaseous refrigerant, the high-temperature high-pressure gaseous refrigerant is discharged through the air outlet of the compressor III 3 and mixed with the high-temperature high-pressure gaseous refrigerant discharged through the air outlet of the compressor II 2 and the air supplementing branch refrigerant discharged through the electronic two-way valve III 19 at the four-way joint D, enters the electronic two-way valve I17 above the four-way joint II to enter the compressor I1 to be compressed at high pressure, is discharged through the air outlet of the compressor I1 and enters the first heat exchanger 4 to exchange heat, and then enters the gas-liquid separator 5 to be separated through the inlet of the gas-liquid separator 5A, the gaseous refrigerant is discharged through the outlet of the gas-liquid separator 5B to enter the second heat exchanger 6 to be heated for the first time, and the liquid refrigerant in the gas-liquid separator 5 enters the electronic three-way valve I15 through the 5C port of the gas-liquid separator 5 to be mixed with the refrigerant from the lower part of the three-way joint; the refrigerant is subjected to heat exchange with the refrigerant at the other side from the 15B port of the electronic three-way valve I15 to the intermediate heat exchanger 7, after the refrigerant emits heat, the refrigerant leaves the intermediate heat exchanger 7 and is divided into an upper branch and a lower branch at a three-way joint five g, one part of the refrigerant enters an air supplementing branch through the three-way joint five g and enters the second expansion valve 9 through the electronic three-way valve II 16, the second expansion valve 9 works to throttle and depressurize the refrigerant and then enters the heat exchanger to exchange heat and absorb heat to become the refrigerant under the intermediate pressure, the refrigerant is mixed with the refrigerant compressed at one stage through the electronic two-way valve III 19, and the other branch enters the first expansion valve 8 to be throttled through the lower part of the three-way joint five g and then enters the evaporator 10 to be compressed through the compression system after heat exchange, and the system completes one cycle.
Embodiment III:
Referring to fig. 1 and fig. 4, on the basis of the first embodiment, the present invention provides a technical solution: in the high energy efficiency mode, the electronic three-way valve 15A of the intermediate air supplementing system is closed; the second electronic three-way valve 16 is closed at 16C;
The refrigerant subjected to heat exchange by the second heat exchanger 6 enters a three-way joint four f through the upper part of the three-way joint four f, the lower side of the three-way joint four f is connected with a 15A port of the electronic three-way valve 15, and as 15A is closed, the lower side of the three-way joint four f is open, the refrigerant can only enter a 16A through the electronic three-way valve two 16 to enter the electronic three-way valve two 16 through the right side of the three-way joint four f, and as 16C of the electronic three-way valve two 16 is closed, the refrigerant flows out from a 16B of the electronic three-way valve two 16 to enter the second expansion valve 9 for throttling and depressurization, enters the intermediate heat exchanger 7 for heat exchange with a main path, enters the left side of the electronic two-way valve three 19 and flows into the electronic two-way valve three 19, and enters the four-way joint two d from the right side of the electronic two-way valve three 19 for air supplementing; after the 5C liquid refrigerant of the gas-liquid separator 5 comes out and enters the three-way valve 15C, the refrigerant flows out from the 15B of the electronic three-way valve I15 and enters the intermediate heat exchanger 7 to exchange heat with the refrigerant of the other side air supplementing branch, and then enters the three-way joint five g from the right of the three-way joint five g, and the refrigerant is divided into an upper branch and a lower branch through the three-way joint five g; the branch circuit above the three-way joint five g is closed by the 16C of the electronic three-way valve II 16, so that the upper part of the three-way joint is open, and the refrigerant can only flow out from the refrigerant below the three-way joint five g into the right inlet of the evaporator 10 of the evaporation system after throttling and depressurization by the first expansion valve 8.
In this embodiment: fig. 4 shows a heating mode of the present invention under high efficiency, and based on the original device of fig. 1, the second electronic two-way valve 18, the fourth electronic two-way valve 20, the 16C port of the second electronic three-way valve 16, and the 15A port of the first electronic three-way valve 15 are closed.
The water supply and the industrial wastewater are treated in the same way as in the first example.
In a heating mode under high efficiency, the refrigerant is compressed by the compressor after absorbing heat of industrial waste heat through the evaporator 10, the system is divided into two branches at the first four-way joint a before entering the compressor, the first branch refrigerant enters the second compressor 2 through the upper part of the first four-way joint a and is compressed into high-temperature and high-pressure gaseous refrigerant, and the high-temperature and high-pressure gaseous refrigerant is discharged through the air outlet of the second compressor 2; the second branch refrigerant enters the compressor III 3 through the right of the four-way joint, enters the compressor III 3 to be compressed into high-temperature high-pressure gaseous refrigerant, the high-temperature high-pressure gaseous refrigerant is discharged through the air outlet of the compressor III 3, enters the compressor I1 through the electronic two-way valve I17 to be subjected to secondary compression after being mixed with the high-temperature high-pressure gaseous refrigerant discharged through the air outlet of the compressor II 2, enters the first heat exchanger 4 from the upper part of the three-way joint III to be subjected to secondary heating after being discharged through the air outlet of the compressor I1, enters the air-liquid separator 5 to be subjected to gas-liquid separation through the inlet of the air-liquid separator 5A, enters the second heat exchanger 6 to be subjected to secondary heating through the outlet of the air-liquid separator 5B, enters the 16A of the electronic three-way valve II 16 through the right of the rear three-way joint I, enters the second expansion valve II 9 to be throttled through the electronic two-way valve II, then enters the air-liquid refrigerant through the intermediate heat exchanger 7 to be subjected to heat absorption into the gaseous refrigerant, enters the air-liquid refrigerant through the three-way valve II 19 and the air-liquid refrigerant C5 to be subjected to secondary heating through the air-liquid separator I, enters the three-liquid heat exchanger 15 to the air-liquid heat exchanger 15 to be subjected to secondary heating through the air-liquid expansion valve B, enters the three-liquid refrigerant C15 to the three-way valve 15 to be subjected to secondary heating, and enters the three-way valve 15 to the waste heat absorption system, and enters the three-way valve 15 to the three-way heat system, and finally enters the three-way valve 15 to be subjected to the waste heat system to the air-phase heat absorption system, and enters the three-phase heat system 15 to be subjected to the air-phase heat-absorption system.
Claims (2)
1. A multi-mode multi-working medium waste heat recovery steam-making high-temperature heat pump device comprises a compression system, a steam generation system, an intermediate air supplementing system and a waste heat recovery and utilization evaporation system, wherein the compression system can be changed along with the working condition of the system; the system is divided into a common energy efficiency low-temperature mode, a common energy efficiency high-temperature mode and a high-energy efficiency mode according to different working conditions, and is characterized in that: the compression system is connected as follows:
The compression system comprises a first compressor (1), a second compressor (2) and a third compressor (3); the electronic two-way valve I (17), the electronic two-way valve II (18) and the electronic two-way valve III (19) are formed; the electronic two-way valve can be switched on and off according to working conditions; tee joint two c, tee joint three e; the four-way joint A, the three-way joint B and the four-way joint D are connected through a pipeline;
Compression system connection mode: the first four-way joint a and the second four-way joint d are divided into a left part, a right part, an upper part and a lower part, the second three-way joint c is divided into a right part, an upper part and a lower part, and the third three-way joint e is divided into a left part, an upper part and a lower part;
The left side of the four-way joint A is connected with the right side of the electronic two-way valve IV (20), the right side of the four-way joint A is connected with the air inlet of the compressor III (3), the upper side of the four-way joint A is connected with the air inlet of the compressor II (2), the lower side of the four-way joint A is connected with the outlet of the evaporator (10) of the evaporation system, the left side of the electronic two-way valve IV (20) is connected with the right side of the three-way joint B, the upper side of the three-way joint B is connected with the lower side of the electronic two-way valve IV (17), the lower side of the electronic two-way valve IV (17) is connected with the left side of the three-way valve IV (17), the upper side of the four-way joint II is connected with the upper side of the electronic two-way valve IV (17), the lower side of the four-way joint II is connected with the air outlet of the compressor III (3), the right side of the four-way joint II is connected with the left side of the electronic two-way valve IV (19), the left side of the four-way joint II is connected with the left side of the electronic two-way valve IV (19), the right side of the four-way joint IV is connected with the three-way valve IV (19), and the middle of the two-way valve IV is connected with the three-way valve IV (19);
The right side of the second three-way joint c is connected with the left side of the second four-way joint d; the lower edge of the tee joint II c is connected with an exhaust port above the compressor II (2); the upper edge of the second three-way joint c is connected with the lower edge of the second electronic two-way valve (18), and the lower edge of the second electronic two-way valve (18) is connected with the upper edge of the second three-way joint c; the lower side of the upper three-way joint three e of the second electronic two-way valve (18) is connected with the upper side of the second electronic two-way valve (18); the upper edge of the three-way joint three e is connected with the inlet of the evaporator of the steam generation system; the left side of the three-way joint three e is connected with an air outlet above the first compressor (1);
The steam generation system is divided into a waterway and a refrigerant circuit, and the connection mode is as follows:
The steam mode system water route consists of a gas-liquid separator (5), a water supply path, a water pump I (14), a second heat exchanger (6), a first heat exchanger (4), an air suction valve (11), an air storage tank (12) and an air release valve (13);
The connection and working modes of the water channel of the steam mode system are as follows:
The water supply is pumped by a water pump (14) and enters a left water end inlet of a second heat exchanger (6) to enter the heat exchanger, the water supply fully absorbs heat of the heat exchanger and is discharged from the right of the second heat exchanger (6) to enter the right of a first heat exchanger (4) to enter the heat exchanger to exchange heat and absorb heat for the second time, so that the water becomes steam, the steam is sucked through a suction valve (11) and enters a gas storage tank (12) to be stored, and the water storage tank can be closed through a discharge valve (13) when the water storage tank is required to be used;
The connection and working modes of the refrigerant paths of the steam mode system are as follows:
The high-temperature high-pressure refrigerant enters the left side of the first heat exchanger (4) through the upper part of the three-way joint of the compression system, enters the refrigerant side of the first heat exchanger (4) to exchange heat with water side for the second time, the refrigerant enters the gas-liquid separator (5) from the right side of the first heat exchanger (4) from the 5A port of the gas-liquid separator (5), the refrigerant is divided into gaseous refrigerant and liquid refrigerant, the gaseous refrigerant enters the right side of the second heat exchanger (6) through the 5B port of the gas-liquid separator (5) and exchanges heat with water side for the first time, and enters the upper part of the four f of the three-way joint after heat exchange; the liquid refrigerant enters the electronic three-way valve I (15) through a 5C port of the gas-liquid separator (5);
The intermediate air supplementing system consists of an intermediate heat exchanger (7), a first expansion valve (8), a second expansion valve (9), an electronic three-way valve I (15) and an electronic three-way valve II (16);
The refrigerant outlet of the second heat exchanger (6) is connected with the upper side of a three-way joint four f, the right side of the three-way joint four f is connected with the 16A port of an electronic three-way valve II (16), the lower side of the three-way joint four f is connected with the 15A port of an electronic three-way valve I (15), the 15B port of the electronic three-way valve I (15) is connected with the inlet of an intermediate heat exchanger (7), the outlet of the intermediate heat exchanger (7) is connected with the left side of a three-way joint five g, the lower side of the three-way joint five g is connected with the upper side of a first expansion valve (8), the upper side of the three-way joint five g is connected with the 16C port of the electronic three-way valve II (16), and the lower side of the first expansion valve (8) is connected with the right inlet of an evaporation system evaporator (10);
The port 16B of the electronic three-way valve II (16) is connected with the right side of the second expansion valve (9), the left side of the second expansion valve (9) is connected with the inlet of the intermediate heat exchanger (7), the left side outlet of the intermediate heat exchanger (7) is connected with the right side of the electronic two-way valve III (19), and the left side of the electronic two-way valve III (19) is connected with the right side of the four-way joint II;
the evaporation system consists of an industrial waste water path and a refrigerant path of the evaporation system;
The evaporating system is connected and works in the following way:
The evaporation system consists of an industrial wastewater supply and evaporator (10), a second water pump (22) and an industrial wastewater centralized treatment area (21);
The waterway part is connected and works in such a way that industrial wastewater is sucked into the evaporator (10) by the second water pump (22) and enters the evaporator to supply heat to the refrigerant of the other evaporation system and then is discharged into the industrial wastewater centralized treatment area (21) for treatment to reach the discharge standard and then is discharged;
The refrigerant path part of the evaporation system is connected and works in the following way; the refrigerant after throttling and depressurization through the first expansion valve (8) enters an evaporator (10) of the evaporation system, and the refrigerant entering the evaporation system absorbs the waste heat of industrial wastewater at the other end; the refrigerant becomes low-pressure superheated refrigerant steam, and then enters the four-way joint A and then enters the compression system for compression.
2. The multi-mode multi-working-medium waste heat recovery steam-making high-temperature heat pump device according to claim 1, wherein: the compression system works as follows:
The working modes of the compression system are divided into two switching modes according to the working modes:
the working modes and the connection of the compression system in the common energy-efficiency low-temperature mode and the high-energy-efficiency mode are as follows:
In the common energy efficiency low-temperature mode and the high-energy efficiency mode, an electronic two-way valve II (18) and an electronic two-way valve III (19) of the compression system are closed, and other electronic two-way valves are opened;
The air inlets of the second compressor (2) and the third compressor (3) are connected with the right side of the first four-way joint a; the air outlets of the second compressor (2) and the third compressor (3) are connected through the lower side and the left side of the second four-way joint d to form a first-stage compression system with air supplementing branches for supplementing air, the first-stage compression system is formed by connecting the two compressors in parallel, the evaporation system enters the second compressor (2) through the first four-way joint a and the third compressor (3) to be respectively compressed into refrigerants under intermediate pressure, the refrigerants enter the second four-way joint d and the third electronic two-way valve (19) to be mixed together after entering the second four-way joint d, the refrigerants enter the left side of the first three-way joint b through the first electronic two-way valve (17), the right side of the first three-way joint b is short-circuited due to the closing of the fourth electronic two-way valve (20), and the refrigerants enter the first condenser (4) of the steam generator system after being compressed into the refrigerants with high temperature and high pressure from the upper side of the first three-way joint b;
The working mode and connection of the compression system under the common energy efficiency high temperature mode are as follows:
The electronic two-way valve I (17) and the electronic two-way valve III (19) of the compression system are closed and the other electronic two-way valves are opened under the common energy efficiency high temperature mode;
The air inlets of the second compressor (2) and the third compressor (3) are connected with the right side of the first four-way joint a; the air inlet below the first compressor (1) is connected with the electronic two-way valve four (20) through the three-way joint one b, and the electronic two-way valve four (20) is connected with the left side of the four-way joint one a, so that the air inlets below the second compressor (2) and the third compressor (3) are connected with the air inlet below the first compressor (1); the air outlets of the second compressor (2) and the third compressor (3) are connected with the left side through the lower side of the second four-way connector, and the electronic two-way valve III (19) is closed, so that no air supplementing mixture exists; after the evaporation system is divided into three paths by a four-way joint and enters a first compressor (1), a second compressor (2) and a third compressor (3) to be respectively compressed into high-temperature and high-pressure refrigerant; the refrigerant discharged by the third compressor (3) enters the second four-way joint (d), and the upper side and the right side of the second four-way joint (d) are open because the first electronic two-way valve (17) and the third electronic two-way valve (19) are closed; therefore, the refrigerant compressed by the third compressor (3) can only reach the right of the second tee joint (c) through the left side of the second four-way joint (d), and then enter the second electronic two-way valve (18) to be compressed by the first compressor (1), and enter the first condenser (4) of the steam generator system after being mixed with the refrigerant compressed by the first compressor (1) and then enter the third tee joint (e) from the left side of the third tee joint (e).
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