139 results about "Absorption heat pump" patented technology

The invention provides a jet-absorption heat pump, and belongs to the technical field of refrigeration and heat pumps. The absorber is provided with a dilute solution pipeline which is communicated with the generator through a solution pump and a solution heat exchanger, the generator is further provided with a concentrated solution pipeline which is communicated with the absorber through the solution heat exchanger, the generator is further provided with a refrigerant steam channel which is communicated with the condenser, and the condenser is further provided with a condensate water channel which is communicated with the outside. The condenser communicates with the evaporator through a refrigerant liquid pipeline via a throttling valve, the evaporator communicates with a low-pressure steam inlet of the ejector through a refrigerant steam channel, a working steam channel communicates with a high-pressure steam inlet of the ejector outside, the ejector communicates with the absorber through a medium-pressure refrigerant steam channel, and the generator communicates with the outside through a high-temperature heat medium channel. The absorber and the condenser are communicated with the outside through heated medium channels respectively, the evaporator is communicated with the outside through a low-temperature heat medium channel, and the jet-absorption heat pump is formed.

The invention discloses a system and method for improving the summer operation performance of a gas-steam combined cycle unit, and the system is characterized in that an expanded economizer is arranged in a waste heat boiler unit of the gas-steam combined cycle unit, and is connected with the generator side of an absorption heat pump unit through a waste heat water circulation pipeline; a waste heat water circulating pump is arranged in the waste heat water circulating pipeline; an air inlet cooling heat exchanger is arranged in an air compressor inlet pipeline of a gas turbine of the gas-steam combined cycle unit, the air inlet cooling heat exchanger is further connected with the evaporator side of the absorption heat pump unit through a chilled water circulation pipeline, and a chilled water circulation pump is arranged in the chilled water circulation pipeline. The condenser side of the absorption heat pump unit is connected with a heat supply network water pipeline, and a heat supply network water circulating pump is arranged in the heat supply network water pipeline. According to the scheme, the summer peak load capacity of the gas-steam combined cycle unit is improved, cascade efficient utilization of energy is achieved, the economical efficiency and the environmental protection property are improved, and collaborative cooling and heating are achieved.

The invention belongs to the technical field of heating, and particularly relates to a heat exchange system and method for power plant low-temperature waste heat recovery heating, and the system comprises a power plant, a lithium bromide absorption heat pump unit and a shell-and-tube steam-water heat exchanger; through the lithium bromide absorption heat pump unit, heat exchange is conducted on heating return water and power plant steam, low-temperature waste heat of a power plant is recycled, and the heating return water is heated; heating return water exchanges heat with steam of a power plant through a shell-and-tube steam-water heat exchanger, and the heating return water is heated; heating return water and power plant steam are subjected to heat exchange through the lithium bromide absorption heat pump unit, low-temperature waste heat of the power plant is recycled, the heating return water is heated, then the heating return water and the power plant steam are subjected to heat exchange through the shell-and-tube steam-water heat exchanger, and the heating return water is heated again. The heating reliability and flexibility can be effectively improved, and the utilization rate of heating equipment is increased.

The invention provides a third-class jet-absorption heat pump, and belongs to the technical field of heat pumps. The low-temperature generator is communicated with the high-temperature generator through the solution pump, the solution heat exchanger and the second solution heat exchanger, the high-temperature generator is communicated with the absorber through the second solution heat exchanger, the absorber is communicated with the low-temperature generator through the solution heat exchanger, the low-temperature generator is communicated with the low-temperature condenser, and the low-temperature condenser is communicated with the evaporator through the low-pressure pump. The high-temperature generator is communicated with the high-temperature condenser, the high-temperature condenser is communicated with the evaporator through the throttling valve, the high-temperature condenser is communicated with the steam generator through the high-pressure pump, the steam generator is communicated with a high-pressure steam inlet of the ejector, the evaporator is communicated with a low-pressure steam inlet of the ejector, and the ejector is communicated with the absorber. The high-temperature generator and the steam generator are provided with high-temperature heat medium channels, the absorber and the high-temperature condenser are provided with heated medium channels, the low-temperature condenser is provided with a cooling medium channel, the low-temperature generator and the evaporator are provided with low-temperature heat medium pipelines to be communicated with the outside, and the third-class jet-absorption heat pump is formed.

The invention discloses a shutdown control method and control device for a large absorption heat pump, and the shutdown control method comprises the steps: respectively obtaining pressure data P1 in a generator and pressure data P2 in an absorber after the large absorption heat pump receives a shutdown instruction; calculating a difference value between the pressure data P1 and the pressure data P2 to obtain a pressure difference delta P between the generator and the absorber; adjusting the actual operation frequency of the solution pump based on the pressure difference delta P actual corresponding to the actual lift of the solution pump; when the pressure difference delta P is smaller than or equal to a preset shutdown deviation value, the solution pump is controlled to operate at a low maintenance frequency and used for providing micro-pressure guarantee for solution circulation; and after the solution pump continuously runs for a preset time at the lower maintaining frequency, the solution pump stops running. Smooth and controlled frequency reduction and shutdown of the solution pump in the shutdown process are achieved, and violent vibration and abnormal sound in the shutdown process of a large absorption heat pump are eliminated.

A solar energy auxiliary combined heat and power system and operation method, the system comprises a boiler, a high, medium and low pressure cylinder of a steam turbine, a condenser, a heat recovery system connected in sequence; further comprising a trough type solar heat collection system, a high and low temperature heat storage tank, an oil-water heat exchanger, a peak heater, a waste heat heater, an auxiliary heater, an absorption heat pump and various valves. During the daytime power peak and heat valley period, the solar energy drives the absorption heat pump and the peak heater, recovers the steam turbine exhaust and the waste heat of the heat network return water, under the premise of meeting the heat supply load, auxiliary improves the steam turbine power output; the excess solar heat is stored through the high temperature tank. During the night power valley and heat peak period, the high temperature tank releases heat to drive the absorption heat pump and the peak heater to recover the steam turbine exhaust and the waste heat of the heat network return water, which is used for heat supply of the heat network. The present application realizes the pure condensing condition operation of the combined heat and power unit in the heating season, and greatly improves the power output of the unit in the power peak period, and the peak regulation capacity is obviously improved.

The invention provides a fourth-class thermally-driven injection-absorption heat pump, and belongs to the technical field of refrigeration and heat pumps. An absorber is communicated with a generator through a solution pump and a solution heat exchanger, the generator is communicated with the absorber through the solution heat exchanger, the generator is communicated with a low-pressure steam inlet of an ejector, the ejector is communicated with a condenser, the condenser is communicated with a steam generator through a booster pump, and the steam generator is communicated with a high-pressure steam inlet of the ejector. The condenser is communicated with the evaporator through a throttling valve, the evaporator is communicated with the absorber, a low-temperature heat medium channel is arranged outside the evaporator and communicated with the compressor, the compressor is communicated with the second compressor through the low-temperature heat medium channel and the evaporator, and the second compressor is communicated with the expansion machine through the low-temperature heat medium channel and the condenser. The expansion machine is communicated with the outside through a low-temperature heat medium channel, the steam generator and the generator are communicated with the outside through high-temperature heat medium channels, the absorber and the condenser are communicated with the outside through heated medium channels, and the fourth-class thermally-driven injection-absorption heat pump is formed.

The utility model relates to a coal chemical industry gasified black water waste heat steam generating system which comprises a flash evaporation unit, a heat exchange unit, a heating medium water unit and a second-class absorption heat pump, the heat exchange unit is connected with the flash evaporation unit, the heating medium water unit is connected with the heat exchange unit, the second-class absorption heat pump is connected with the heating medium water unit, a water-water heat exchanger is arranged in the heat exchange unit, and the water-water heat exchanger is connected with the second-class absorption heat pump. High-temperature black water exchanges heat with low-temperature heat medium water in the water-water heat exchanger and then is cooled, the low-temperature heat medium water exchanges heat with the high-temperature black water in the water-water heat exchanger and is heated to become high-temperature heat medium water, and the high-temperature heat medium water is conveyed to the second-class absorption heat pump to be used for preparing high-grade steam. High-temperature heat medium water is returned to the water-water heat exchanger to be recycled after being subjected to heat absorption and cooling by the second-class absorption heat pump, black water waste heat is converted into high-grade steam required by production through the heat exchange unit, the heat medium water unit and the second-class absorption heat pump, waste of gasified black water waste heat is reduced, and the black water waste heat recovery efficiency and utilization quality are effectively improved. And the utilization efficiency of energy is integrally improved.

The utility model discloses a stepped deep recovery system for flue gas waste heat of desulfurization slurry, relates to the field of heat energy recovery, and aims to solve the problems that an existing system is insufficient in waste heat recovery, needs additional energy cooling equipment and is high in improvement cost. The system comprises a desulfurizing tower, a flash tower, a primary absorption heat pump, a secondary heat pump and a vacuumizing device, part of slurry in the desulfurizing tower enters the flash tower for flash evaporation, flash evaporation dead steam exchanges heat through the first-stage absorption heat pump to heat return water of a heat supply network, generated dead steam tail gas and heat of the vacuumizing device are further recycled to the return water of the heat supply network through the second-stage absorption heat pump, and the vacuumizing device maintains the vacuum degree of the flash tower. The system does not need to transform an original flue gas system on a large scale, recycles waste heat in a stepped mode, improves the energy utilization rate, recycles condensate water, reduces cost and energy consumption, and is suitable for waste heat recovery scenes after coal-fired flue gas desulfurization.

The application discloses an air absorption heat pump, comprising a vacuum phase change boiler, wherein an air inlet end of the vacuum phase change boiler is communicated with a fan, and an air outlet end of the vacuum phase change boiler is communicated with a flue gas cooling tank; a flue gas outlet is communicated with the flue gas cooling tank, a water outlet end of the flue gas cooling tank is communicated with an evaporation pump, a water outlet end of the evaporation pump is communicated with an air preheating tank, and the evaporation pump draws high-temperature water in the flue gas cooling tank into the air preheating tank. The application has the advantages of preventing condensation corrosion, solves the problem that the air absorption heat pump cannot be used due to the fact that the condensation corrosion of the boiler is serious caused by the fact that the humidity of combustion-supporting air is greatly increased and the dew point temperature is increased in the heat and mass transfer process of the air absorption heat pump.

The invention provides an open type absorption heat pump system and a carbon dioxide trapping system coupled with the open type absorption heat pump system. The open-type absorption heat pump system comprises a gas flow divider, a first heat exchanger and a second heat exchanger, wherein the gas flow divider is used for dividing input moisture-containing gas into a first gas flow and a second gas flow; the absorption module is configured to enable the entering absorbent concentrated solution to be in contact with the entering first air flow so as to absorb moisture in the first air flow and release heat, so that an absorbent dilute solution is generated; the regeneration module is configured to heat the absorbent dilute solution from the absorption module by using heat to obtain a regenerated absorbent concentrated solution and output the regenerated absorbent concentrated solution to the absorption module; and the self-heating module is in fluid communication with the gas flow divider, is in thermal connection with the regeneration module, and is configured to provide heat required by heating for the regeneration module by utilizing the second gas flow shunted by the gas flow divider. Waste heat recovery and gas temperature and humidity cooperative treatment are realized, and the operation cost of the carbon capture system is reduced.

This invention discloses a natural gas air source absorption heat pump system, relating to the field of gas heat pump technology. It includes an integrated multi-layer composite heat exchanger, an evaporator, a gas valve, a solution circulation pump, a concentration regulating valve, an air-side fan, an online working fluid concentration regulating system, and a composite controller. By setting up the integrated multi-layer composite heat exchanger, the high-temperature flue gas channel, the generator solution channel, the distillation and absorption composite channel, and the air preheating channel are arranged sequentially from the inside out, forming a counter-current coupled heat exchange structure of flue gas, solution, and air. This allows the waste heat from the high-temperature flue gas generated by gas combustion, the absorption heat released by the absorber, and the condensation heat released by the condenser to be naturally transferred from high to low grade within the same composite heat exchanger. The absorption heat is then transferred in situ to the air intake of the outer preheating evaporator, thereby achieving multi-stage coupled utilization of thermal energy and significantly improving the primary energy utilization rate of the heat pump system.

The application discloses a hydrothermal co-production and co-transmission system. The system comprises a seawater desalination module, which is used for desalinating seawater into fresh water with different temperatures by using a thermal method seawater desalination mode, and transmitting the fresh water with different temperatures to corresponding groups of absorption heat pumps and peak heat exchangers in parallel; the absorption heat pumps and the peak heat exchangers are used for recovering waste heat of the fresh water with different temperatures and heating the fresh water at the same time, obtaining treated fresh water, and transmitting the treated fresh water to a hydrothermal separation module through a combined supply conveying pipeline; and the hydrothermal separation module is used for hydrothermal separation of the treated fresh water, and obtaining heat and water. The heating process of the system after the seawater desalination module generates fresh water with different temperatures further reduces irreversible loss of the system, improves comprehensive efficiency of the system, and further reduces heat supply cost.

The application discloses a waste heat recovery type carbon capture system and an operation method, and the system can effectively reduce the heat required by a desorption tower, thereby reducing the energy consumption of the carbon capture system. The system comprises a coal-fired power generation system, an absorption heat pump and a carbon capture system. The medium-temperature waste heat of boiler exhaust gas is fully utilized. The temperature of flue gas at the outlet of a generator and an evaporator is adjusted, the carbon capture system is deeply coupled with the unit, the influence of the coupled carbon capture system on the coal-fired unit is reduced, and meanwhile, the problem that the temperature and heat of chemical solvents at the outlet of the desorption tower are difficult to meet the sensible heat of the chemical solvents carrying carbon dioxide is solved. The energy of flue gas is utilized, the influence of the coupled carbon capture system on the coal-fired unit is reduced, the system design of the coupled carbon capture system is improved, and the direction of clean coal technology is provided.

The present application belongs to the technical field of combined heat and power generation, and discloses a plant-level combined heat and power generation unit combined heat supply system and an operation method thereof. The plant-level combined heat and power generation unit combined heat supply system comprises a first ejector, a second ejector, a heat storage heat exchanger, a heat storage device, a first ejector heater, an absorption heat pump, a peak heater, a compression heat pump and a basic heater group. In the present application, the heat network water is heated in the basic heater group, the first ejector heater, the absorption heat pump and the peak heater in stages, and then supplied to the outside, so that the heat exchange loss is reduced, the energy utilization efficiency is improved; by adopting the series connection of the basic heater group, the ejector and the heat pump, the low-temperature waste heat is fully utilized, the consumption of high-grade steam is reduced, and the heat supply cost is reduced; by adopting the heat storage technology and the compression heat pump auxiliary heat supply, the heat supply demand can still be met when the power plant participates in the grid peak regulation, and the heat supply capacity and the heat supply flexibility of the power plant are improved.

This invention discloses a multi-cold source system and method for a gas-fired steam boiler coupled with a two-stage heat pump. The flue gas from the gas-fired boiler releases heat through two stages of flue gas-water heat exchangers, then enters a parallel first-stage flue gas-air heat exchanger, a third-stage flue gas-water heat exchanger, and a flue gas-circulating water heat exchanger. The flue gas-circulating water heat exchanger provides a heat source for a low-temperature heat pump or a lithium bromide absorption heat pump, or an air-source heat pump can replace the flue gas-circulating water heat exchanger and the low-temperature heat pump. The heat from the flue gas in the parallel structure is distributed, and the released heat from the flue gas heats the air and feedwater. The flue gas then heats the feedwater through the low-temperature heat pump, air-source heat pump, or lithium bromide absorption heat pump. The heated feedwater then absorbs heat through a high-temperature heat pump and the first-stage flue gas-water heat exchanger before entering the gas-fired boiler along with the air. This invention fully absorbs the latent heat of water vapor in the flue gas of a gas-fired steam boiler, reducing the flue gas temperature to below 30°C, raising the feedwater temperature from 20°C to 120-140°C, raising the air temperature from 20°C to 50-90°C, and increasing the boiler efficiency to over 107%.

The invention provides a nuclear energy heat supply system which can be used in the technical field of energy. The system comprises a nuclear power generation system, a steam ejector, an absorption heat pump and a heat supply network pipeline, the nuclear power generation system comprises a steam turbine which comprises a high-pressure cylinder and a low-pressure cylinder. The steam ejector is connected with the high-pressure cylinder and the low-pressure cylinder and used for introducing high-grade steam of the high-pressure cylinder and low-grade steam of the low-pressure cylinder, and medium-grade steam is obtained after the high-grade steam and the low-grade steam are mixed. The absorption heat pump is connected with the steam ejector so as to take the medium-grade steam as a driving heat source; the absorption heat pump is connected with a closed circulating cooling pipeline of the nuclear energy power generation system so that closed circulating cooling water of the closed circulating cooling pipeline can serve as a low-temperature heat source. The heat supply network pipeline is connected with the absorption heat pump so that heat supply network return water in the heat supply network pipeline can be heated through the absorption heat pump. By recycling the exhaust steam of the low-pressure cylinder, the nuclear power heat supply efficiency and the energy utilization rate are greatly improved.

This utility model relates to the field of lithium bromide solution technology and discloses a lithium bromide heat pump device utilizing waste heat from circulating water. The device includes a tank body and a lid on top of the tank body. A partition is fixed to the inner wall of the tank body, and three filter elements are installed inside the partition. A disassembly assembly is located inside the partition, including a mounting plate fixed to the inner wall of the partition. The mounting plate has three threaded holes on its inner wall, and the filter elements have external threads on their outer sides. This utility model uses a lithium bromide absorption heat pump to externally connect to a filter tank for processing lithium bromide solution. The three filter elements installed inside the filter tank allow for filtration of the used lithium solution, effectively adsorbing impurities and enabling the lithium solution to be recycled. The filter tank has a flange-connected, detachable structure, consisting of a tank body and a lid. The disassembly assembly facilitates timely replacement of the filter elements installed inside the tank, making operation simple and convenient.

This invention relates to the field of heat pump system technology, and discloses a cascaded heating system that utilizes waste heat to drive an absorption heat pump. The system includes a high-temperature heat pump assembly, in which a superheated section is formed between the compressor outlet and the working fluid inlet of the high-temperature heat pump condenser; an intermediate heat transfer fluid assembly loop, with a first heat exchange unit between the intermediate heat transfer fluid assembly loop and the superheated section, connected to the high-temperature heat pump condenser; a second heat exchange unit between the intermediate heat transfer fluid assembly loop and the condensation section of the high-temperature heat pump assembly, connected to the high-temperature heat pump condenser; an absorption heat pump assembly, including a generator, which is heat-exchange connected to the intermediate heat transfer fluid assembly loop; and a control system, electrically connected to both the first and second heat exchange units. This invention achieves secondary utilization of low-temperature waste heat through cascade coupling, significantly improving the system's total heating capacity and overall energy efficiency.

The application belongs to the technical field of heat supply, and particularly relates to a geothermal and coal power unit coupled heat supply system and method, which comprises: a first heat exchange module, which is used for performing primary heat exchange on initial geothermal water and first user water through a first plate heat exchanger to obtain second geothermal water and first temperature exchange water; a second heat exchange module, which is used for performing heat exchange on the second heat exchange water and low-temperature output water through a second plate heat exchanger to obtain third geothermal water and second temperature exchange water; a medium-pressure cylinder, which is used for providing high-temperature steam as a high-temperature driving heat source according to an initial driving efficiency; an absorption heat pump, which is used for receiving the first temperature exchange water, the second temperature exchange water and the high-temperature driving heat source to perform heat conversion, monitoring a pump heat conversion efficiency to adjust the initial driving efficiency, and obtaining target output water for heat supply. The application improves the utilization rate of geothermal resources.

The application discloses a pressure-isolating station heat supply system and method capable of flexibly adjusting temperature difference, belongs to the technical field of heat supply, and comprises a plate heat exchanger, an absorption heat pump and a regulating valve group. The plate heat exchanger is connected in series with the absorption heat pump at a primary side, and the plate heat exchanger is connected in parallel with the absorption heat pump at a secondary side heat network return water side. By adjusting the opening degree of the regulating valve group, maximum temperature difference working conditions, adjusted temperature difference working conditions and minimum temperature difference working conditions can be realized, flexible adjustment of the primary side temperature difference is realized, and then flexible adjustment of heat supply load is realized. The system can realize primary network large temperature difference operation and secondary network conventional flow conventional temperature difference operation, does not need to transform other heat exchanger stations at the secondary network end into large temperature difference heat exchanger stations, and has good operability and economy.

The invention provides a steam generation system based on a fourth-type injection-absorption heat pump, and belongs to the technical field of heat pumps. A low-temperature generator, a solution pump, a solution heat exchanger, a second solution heat exchanger, a high-temperature generator and an absorber form a solution loop, the low-temperature generator is communicated with an evaporator through a low-temperature condenser and a low-pressure pump, the high-temperature generator is communicated with a low-pressure steam inlet of an ejector, and the ejector is communicated with a high-temperature condenser. The high-temperature condenser is communicated with an evaporator through a low-temperature generator and a throttling valve, the evaporator is communicated with an absorber, the high-temperature condenser is communicated with a steam generator through a high-pressure pump, the steam generator is communicated with a high-pressure steam inlet of an ejector, and the outside is provided with a heated medium channel which is communicated with a low-pressure steam inlet of a second ejector through the absorber and the high-temperature condenser. The outside is communicated with a high-pressure steam inlet of the second ejector through a working steam channel, the second ejector is communicated with the outside through a user steam channel, and the high-temperature generator, the steam generator, the evaporator and the low-temperature condenser are communicated with the outside through heat source medium channels.

The invention provides a dual-temperature-difference-driven compression-injection-absorption heat pump, and belongs to the technical field of heat pumps. The absorber is communicated with the second absorber through the solution heat exchanger, the second absorber is communicated with the generator through the solution pump and the second solution heat exchanger, the generator is communicated with the absorber through the second solution heat exchanger, the second generator, the second solution pump and the solution heat exchanger, and the second generator is communicated with the absorber through a steam channel. The generator is communicated with a low-pressure steam opening of the ejector, the ejector is communicated with the condenser, the condenser is communicated with a high-pressure steam opening of the ejector through the booster pump and the steam generator, and the condenser is communicated with the absorber through the throttling valve, the evaporator, the compressor, the high-temperature heat exchanger and the expansion machine. The generator, the steam generator and the high-temperature heat exchanger are communicated with the outside through high-temperature heat medium channels, the absorber and the condenser are communicated with the outside through heated medium channels, the second generator and the evaporator are communicated with the outside through medium-temperature heat medium channels, and the second absorber is communicated with the outside through a cooling medium channel.

The application provides a heat recovery method and device of a pyrolysis rotary furnace, and the heat recovery method comprises pyrolysis gas flow condensation: high-temperature pyrolysis gas flows out from a pyrolysis furnace, enters a high-temperature condenser after slag removal, is cooled by a light working medium, high-boiling-point pyrolysis oil components are condensed out, are collected and discharged into a high-boiling-point oil tank for storage, and meanwhile, medium-temperature pyrolysis gas is obtained; working medium circulation: the light working medium absorbs the heat of the high-temperature pyrolysis gas in the high-temperature condenser, evaporates water vapor and becomes a concentrated working medium which is discharged from the lower part of the condenser and returned to a medium absorber, during which, the concentrated and light liquid heat exchanger is used to transfer the heat of the working medium to the light working medium of the high-temperature condenser; the application of the mature technology is a derivative application of the absorption heat pump technology, the working principle is simple, the system route is safe, and the operation is stable.

The invention provides a fourth type injection-absorption heat pump, and belongs to the technical field of heat pumps. The low-temperature generator is communicated with the high-temperature generator through the solution pump, the solution heat exchanger and the second solution heat exchanger, the high-temperature generator is communicated with the absorber through the second solution heat exchanger, the absorber is communicated with the low-temperature generator through the solution heat exchanger, the low-temperature generator is communicated with the low-temperature condenser, and the low-temperature condenser is communicated with the evaporator through the low-pressure pump. The high-temperature generator is communicated with the high-temperature condenser, the high-temperature condenser is communicated with the evaporator through the low-temperature generator and the throttling valve, the high-temperature condenser is communicated with the steam generator through the high-pressure pump, the steam generator is communicated with a high-pressure steam inlet of the ejector, the evaporator is communicated with a low-pressure steam inlet of the ejector, and the ejector is communicated with the absorber. And the absorber and the high-temperature condenser are provided with heated medium channels, the low-temperature condenser is provided with a cooling medium channel, and the evaporator is provided with a low-temperature heat medium pipeline to be communicated with the outside, so that the fourth-type jet-absorption heat pump is formed.

The utility model discloses a vacuum membrane distillation wastewater treatment system based on an absorption heat pump, and belongs to the field of energy conservation and environmental protection. The system comprises a first circulating pump (1-1), a second circulating pump (1-2), a third circulating pump (1-3), a first heat exchange coil pipe (2-1), a second heat exchange coil pipe (2-2), a first control valve (3-1), a second control valve (3-2), a vacuum pump (4), a feeding water tank (5), a condensation water tank (6), a vacuum membrane module array (7), a condenser (8), a throttle valve (9), a generator (10), a driving heat source (11), a heat exchanger (12), an evaporator (13) and an absorber (14). The secondary steam latent heat is recycled to the maximum extent, the energy requirement in the vacuum membrane distillation wastewater treatment process is met through the absorption heat pump, and the device has the advantages of being high in energy utilization efficiency, low in operation cost, high in operation stability and the like, and is suitable for the fields of industrial heat supply, chemical separation and the like.

This invention relates to the field of power plant equipment technology, specifically disclosing a steam supply system for power plants. The system includes an absorption heat pump, a waste heat recovery pipeline, and an external steam supply pipeline. The waste heat recovery pipeline includes a recovery loop and a cooling branch. The recovery loop connects the steam supply unit (power generation equipment) and the cooling unit. The cooling branch connects the coolant inlet, the cooling unit, the absorption heat pump, and the coolant outlet. The external steam supply pipeline includes a main heating line and heating branches. The main heating line connects the fresh water inlet, the absorption heat pump, the primary heating unit, the secondary heating unit, and the steam outlet. The heating branches connect the secondary heating unit and the absorption heat pump. A heating branch also connects the power generation steam supply unit, the secondary heating unit, and the primary heating unit. In this invention, the residual heat in the power generation equipment is recovered and utilized for heating steam, thereby reducing heat waste and lowering the overall energy consumption of the system.

The invention provides a first-class compression-injection-absorption heat pump, and belongs to the technical field of refrigeration and heat pumps. The absorber is provided with a dilute solution pipeline which is communicated with the generator through a solution pump and a solution heat exchanger, the generator is further provided with a concentrated solution pipeline which is communicated with the absorber through the solution heat exchanger, the generator is further provided with a refrigerant steam channel which is communicated with the condenser through a compressor, and the condenser is further provided with a refrigerant liquid pipeline which is communicated with the evaporator through a throttling valve. The evaporator communicates with a low-pressure steam inlet of the ejector through a refrigerant steam channel, the condenser communicates with the steam generator through a refrigerant liquid pipeline via a booster pump, the steam generator communicates with a high-pressure steam inlet of the ejector through a high-pressure refrigerant steam channel, and the ejector communicates with the absorber through a medium-pressure refrigerant steam channel. The steam generator and the generator are further communicated with the outside through high-temperature heat medium channels respectively, the absorber and the condenser are communicated with the outside through heated medium channels respectively, the evaporator is communicated with the outside through a low-temperature heat medium channel respectively, and the first-class compression-injection-absorption heat pump is formed.

The invention provides a fourth-class compression-injection-absorption heat pump, and belongs to the field of heat pumps. The low-temperature generator is communicated with the high-temperature generator through the solution pump, the solution heat exchanger and the second solution heat exchanger, the high-temperature generator is communicated with the low-temperature generator through the second solution heat exchanger, the absorber and the solution heat exchanger, and the low-temperature generator is communicated with the low-temperature condenser, the low-pressure pump and the evaporator. A high-temperature generator is communicated with a compressor, a high-temperature heat exchanger, an expansion machine and a high-temperature condenser, the high-temperature condenser is communicated with an evaporator through a low-temperature generator and a throttling valve and communicated with a steam generator and a high-pressure steam opening of an ejector through a high-pressure pump, the evaporator is communicated with a low-pressure steam opening of the ejector, and the ejector is communicated with an absorber. The high-temperature generator, the high-temperature heat exchanger and the steam generator are communicated with the outside through high-temperature heat medium channels, the absorber and the high-temperature condenser are communicated with the outside through heated medium channels, the low-temperature condenser is communicated with the outside through a cooling medium channel, and the evaporator is communicated with the outside through a low-temperature heat medium pipeline.

This utility model discloses an absorption-compression high-temperature heat pump system for recovering waste heat. Its two-stage compression heat pump system includes high and low pressure compressors, a compression system condenser and evaporator, and a medium- and low-temperature waste heat recovery evaporator. The high-temperature absorption heat pump system includes a high-temperature absorber, a high-temperature solution heat exchanger, a high-temperature generator, an evaporative condenser, and a high-temperature evaporator. The low-temperature absorption heat pump system includes a low-temperature solution heat exchanger, a low-temperature absorber, a low-temperature generator, a low-temperature condenser, and an evaporative condenser. The absorption heat pump-driven heat source water system includes a compression system condenser, high and low temperature generators, and a high-temperature evaporator. The waste heat recovery water system includes a compression system evaporator and a low-temperature condenser. Its structure is compact, the heat flow path is clear, and internal heat is recycled. It recovers waste heat while achieving efficient thermal coupling between the compression and absorption stages, increasing the heat generation temperature. It has a wide range of applications and meets the needs of energy saving and high-temperature heating.