232 results about "Absorption heat pump" patented technology

The invention discloses a gas turbine air inlet temperature coordinated regulation and control system based on waste heat multi-stage utilization and an operation method, and relates to the technical field of combined cycle unit energy conservation, the system comprises a waste heat recovery module, an air inlet temperature regulation and control module, an energy conversion module and a control module; high-temperature exhaust smoke of the waste heat boiler is used as a heat source to heat a flue gas heat exchanger at the tail of the waste heat boiler of the combined cycle unit to generate hot water, and the hot water is used for directly heating inlet air of a gas turbine, driving an absorption heat pump to generate cold water to cool the inlet air of the gas turbine or driving an organic Rankine cycle module to generate power to be connected into auxiliary power, so that multipurpose utilization of waste heat of the unit is realized; in addition, the invention provides an operation method for synergistically improving the efficiency of the system and the combined cycle unit, the wide-load operation capacity and the partial-load energy utilization capacity of the unit can be effectively improved, meanwhile, the waste heat recovery capacity under the high-temperature condition is guaranteed, and the energy consumption efficiency of the unit is comprehensively improved.

The invention relates to the technical field of heating, in particular to a heating system based on waste heat recovery of a generator set, which comprises a waste heat collection unit comprising a plate heat exchanger and a cooling tower which are connected in parallel on a condenser circulating pipeline of the generator set, and a switching valve group is arranged between the plate heat exchanger and the cooling tower; the underground energy storage unit comprises a first mining and recharging well and a second mining and recharging well which are connected with the plate heat exchanger through a heat exchange pipeline, and the bottoms of the first mining and recharging well and the second mining and recharging well are thermally coupled through a high-heat-conduction filling layer; the heat pump unit comprises a lithium bromide absorption heat pump, and a low-temperature heat source inlet of the lithium bromide absorption heat pump is connected with an outlet of the plate heat exchanger and a water pumping pipeline of the first mining and recharging well in parallel. Compared with the prior art, the system has the advantages that the underground energy storage unit and the switching valve group are arranged to operate cooperatively and work cooperatively, heat supply safety is guaranteed, meanwhile, overground and underground integrated waste heat regulation, storage, release and control are achieved, and the stability, the regulation capacity and the energy comprehensive utilization efficiency of the system are improved.

The invention provides a CO2 trapping system and method based on a compression-absorption heat pump. The CO2 trapping system comprises a CO2 trapping unit, a CO2 compression and liquefaction unit and a compression-absorption heat pump unit, the CO2 trapping unit at least comprises an absorption tower and a desorption tower, and the absorption tower is connected to the desorption tower through a CO2 rich liquid pipeline via the compression-absorption heat pump unit; the CO2 compression and liquefaction unit is connected with the compression-absorption heat pump unit through a liquefied CO2 pipeline; the compression-absorption heat pump unit is used for extracting low-grade heat energy of liquefied CO2 generated by the CO2 compression and liquefaction unit and converting the low-grade heat energy into high-grade heat energy to heat CO2 rich liquor in the CO2 capture unit. According to the CO2 capturing system provided by the invention, the compression-absorption heat pump unit is utilized to realize efficient utilization of heat of the whole system for capturing CO2 from combustion flue gas to form a liquefied product, so that the heat grade and the heat pump performance coefficient are improved, the energy consumption of the CO2 capturing system is greatly reduced, and energy-saving CO2 capturing is realized.

The invention relates to the technical field of industrial volatile organic compound treatment, in particular to a waste heat four-stage gradient utilization network system which comprises four stages of waste heat utilization paths, and the four stages of waste heat utilization paths are as follows in sequence: first-stage utilization: RTO exhaust smoke preheats runner desorption wind to 200 DEG C through a plate-fin heat exchanger; secondary utilization: preheating the desorbed waste gas to 150 DEG C through a heat pipe heat exchanger; third-stage utilization: the waste heat at 80 DEG C drives an absorption heat pump system; in the fourth-stage utilization, 50 DEG C low-temperature waste heat is used for workshop heating through a finned tube radiator; according to the plate-fin heat exchanger and heat pipe combined heat exchange device, the waste heat utilization rate is increased to 72% from 35%. By constructing a four-stage waste heat utilization path, low-temperature waste heat generated when RTO smoke is exhausted to 50 DEG C is gradually converted into desorption air preheating, air inlet preheating, heat pump driving, workshop heating and other energy consumption requirements, the problems that traditional waste heat utilization efficiency is low, equipment cooperation is poor, regulation and control are not flexible and the like are effectively solved, and an innovative scheme is provided for efficient utilization of industrial waste heat.

The invention relates to a deep waste heat recovery coupling utilization system of a gas-steam combined cycle unit, and relates to the technical field of thermal power generation. The waste heat boiler plate heat exchanger receives the flue gas, the flue gas and the intermediate water are subjected to heat exchange treatment, and flue gas intermediate water is obtained; the absorption heat pump receives the flue gas intermediary water and heat supply network circulating water discharged by the heat supply network heat supply system, and the heat supply network circulating water is heated based on the flue gas intermediary water; the heat supply network heat supply system receives heat supply network circulating water and supplies heat to the outside based on the heat supply network circulating water. The closed circulating water system provides closed circulating water intermediate water; the gas turbine intake air heating heat exchanger receives the closed circulating water intermediate water to heat intake air of the gas turbine based on the closed circulating water intermediate water. According to the scheme, multi-stage utilization of flue gas heat is achieved, the overall utilization efficiency of energy is improved, energy waste is reduced, high-temperature flue gas is prevented from being directly discharged into the atmosphere, and the influence of heat pollution on the environment is effectively reduced.

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 utility model relates to a first-class lithium bromide absorption heat pump unit for preparing a high-temperature heat source. Comprising a generator A, a condenser A, a generator B, a condenser B, an evaporator A, an absorber A, an evaporator B, an absorber B, a heat exchanger A, a heat exchanger B, a solution pump A, a refrigerant pump A, a solution pump B, a refrigerant pump B, an internal circulation water pump, an internal circulation medium-temperature hot water system, pipelines, valves and the like, recycled low-temperature waste heat source heat is transferred to internal circulation medium-temperature hot water through the evaporator A and the absorber A. The internal circulation medium-temperature hot water enables the evaporation temperature of the evaporator B to be increased and the absorption pressure to be increased, so that the absorber B produces a high-temperature heat source. The generator and the condenser adopt independent cylinders, the pressure bearing capacity and the thermal displacement capacity of the unit are improved, the generating pressure and the condensing temperature are increased, and a high-temperature heat source can be produced. The unit expands the application field, realizes single-machine ultra-large type, reduces the total investment, and improves the comprehensive utilization rate of energy.

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 present application belongs to the technical field of sludge drying and power plant waste heat utilization, and discloses a sludge low-energy-consumption drying and heat energy optimal utilization method based on power plant waste heat. Firstly, the exhaust heat of the power plant boiler and the steam turbine extraction driving absorption heat pump are collected, the low-grade heat energy is upgraded into high-grade heat source suitable for sludge low-temperature drying requirement, and is delivered to the drying unit. The belt low-temperature dryer is used to complete the continuous drying of the sludge in cooperation with the fully-closed air circulation system. The drying tail gas is pre-heated with the backflow low-humidity air and then is condensed and dehumidified. The condensation and vaporization latent heat is recovered and delivered to the heat pump input end. The dehumidified air is backflow circulated. The standard sludge is mixed and burned with coal, and the ash is used as building material raw material and is recycled. The method effectively improves the utilization rate of low-grade waste heat of the power plant, the drying energy consumption is far lower than that of the traditional steam drying process, the drying product quality is stable, the harmless reduction and resourceful disposal of the sludge are realized, and the operation requirement of various coal-fired power plants is met.

The application discloses a two-stage first-type lithium bromide absorption heat pump machine with two-stage evaporators connected at the bottom, which comprises a condenser, a secondary generator, a high-pressure stage secondary absorber, a high-pressure stage evaporator, a low-pressure stage secondary absorber, a low-pressure stage evaporator, a primary generator, a primary absorber, a primary heat exchanger, a secondary heat exchanger and pipelines arranged between the components. The main feature of the machine set is that the low-temperature waste heat source is divided into two sections, the high-temperature coolant water enters the high-pressure stage evaporator after flashing, then enters the high-pressure stage evaporator liquid tank, and the amount of coolant water used in the high-pressure stage evaporator and the low-pressure stage evaporator is automatically distributed through the coolant water connecting pipe. After being divided into sections, the concentration difference of the solution circulation is increased, the heat exchange temperature difference is increased, the heat exchange area is reduced, the material cost of the machine set is reduced, the equipment investment cost is reduced, the machine set is beautiful in appearance, compact in structure, high in performance coefficient, more waste heat can be recycled, and the comprehensive utilization rate of energy is improved.

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 relates to the technical field of waste heat utilization, and provides a four-season type cold and heat linkage intelligent switching control method and system.The four-season type cold and heat linkage intelligent switching control method comprises the steps that a double-working-condition absorption heat pump is used for receiving a working condition instruction and executing a first instruction of heat energy conversion; the waste heat supply module is deployed as a first power source and used for conveying flue gas waste heat to the first power input end of the double-working-condition absorption heat pump through the flue gas waste heat collecting device. A steam supply module; the second power source is arranged as a second power source and used for conveying steam heat energy generated by the steam turbine to the second power input end of the double-working-condition absorption heat pump; the switching execution module determines a target operation mode according to the first instruction, and in the target operation mode, the heat distribution proportion of the first power source and the second power source is determined according to the second instruction; the operation adjusting module is used for controlling the output proportion of the smoke waste heat flow of the first power source and the steam flow of the second power source through the heat distribution proportion so as to match the heat energy conversion requirement corresponding to the working condition instruction.

The invention discloses an energy-saving system and method for waste heat graded recovery of a chemical production device. The high-temperature waste heat direct supply subsystem comprises a high-temperature waste heat recovery device, is used for being connected with high-temperature waste heat generation equipment to recover high-temperature waste heat generated by the high-temperature waste heat generation equipment, and is also used for being connected with a high-temperature waste heat utilization device to enable the high-temperature waste heat utilization device to utilize the high-temperature waste heat recovered by the high-temperature waste heat recovery device; the medium-temperature waste heat utilization subsystem is used for being connected with the medium-temperature waste heat generation equipment and the high-temperature waste heat utilization device and further used for being connected with the medium-temperature waste heat utilization device so that medium-temperature waste heat generated by the medium-temperature waste heat generation equipment and the high-temperature waste heat utilization device can be utilized by the medium-temperature waste heat utilization device; and the low-temperature waste heat recovery subsystem comprises a low-temperature waste heat recovery device and an absorption heat pump and is used for recovering low-temperature waste heat of the high-temperature waste heat direct supply subsystem and the medium-temperature waste heat utilization subsystem, and the absorption heat pump is connected with the low-temperature waste heat recovery device. Waste heat graded coupling utilization and efficient gradient utilization can be achieved.

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.

This invention discloses a low-temperature district heating and cooling system based on multi-heat flux reconfiguration theory. In the heat source station, the steam outlet of the first waste heat boiler is connected to both the working fluid inlet and the process steam pipe inlet of a medium-pressure ejector. The mixed fluid outlet of the medium-pressure ejector is connected to the working fluid inlet of a medium-low pressure ejector. The mixed fluid outlet of the medium-low pressure ejector is connected to a first branch point. The medium-pressure steam at the first branch point is divided into three paths: the first path outlet is connected to both the ejector fluid inlet of the medium-pressure ejector and the working fluid inlet of the low-pressure ejector; the second path outlet is connected to the steam-side inlet of the medium-low pressure steam-water heat exchanger; and the third path outlet is connected to the steam inlet of a single-effect lithium bromide absorption heat pump generator. The mixed fluid outlet of the low-pressure ejector is connected to the ejector fluid inlet of the medium-low pressure ejector. This invention employs multiple ejectors in series, a single-effect lithium bromide absorption heat pump, and a steam flash tank to achieve multi-grade, multi-heat flux reconfiguration optimization and efficient comprehensive utilization.

The application discloses a lithium bromide heat pump integrated composite generator-condenser and system based on a hollow fiber membrane, utilizes industrial waste heat as a high-temperature heat source, combines membrane heat mass transfer technology of the hollow fiber membrane, combines a generator and a condenser in a lithium bromide absorption heat pump, and forms an integrated composite generator-condenser structure. The industrial waste heat is used as a high-temperature heat source to heat a dilute lithium bromide solution, water vapor in the high-temperature lithium bromide solution penetrates into a water vapor layer through the hollow fiber membrane due to a steam pressure difference, and the water vapor is cooled by circulating cooling water to realize simultaneous heat and working medium transfer. The condensed water does work in an evaporator and enters an absorber to be sprayed and mixed with a concentrated lithium bromide solution, and then enters the integrated composite generator-condenser again to circulate. The composite generator-condenser discards a form that a traditional evaporator and an absorber are separated, greatly reduces a land occupation area of the equipment, simultaneously avoids medium transportation between the equipment, reduces heat loss, and improves a performance coefficient of the heat pump.

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 invention relates to the technical field of heating devices, and discloses a fuel gas absorption heat pump energy-saving heating device and method.The fuel gas absorption heat pump energy-saving heating device comprises a fixed base, a protective shell is fixedly connected to the upper surface of the fixed base, a display screen is installed on the outer wall of the protective shell, and a fuel gas burner is installed at the top of the protective shell; and the bottom of the gas burner is fixedly connected with a conveying pipeline. High-temperature fuel gas is conveyed to the absorption heat pump body through the fuel gas burner, a lithium bromide solution is heated through the generator to enable a refrigerant to be evaporated, heat is released in the condenser to heat heating circulating water, meanwhile, part of refrigerant steam is pressurized and heated in combination with the compressor, efficient heat conversion is achieved, and energy is saved. The evaporator, the compressor, the heat exchange tower and other assemblies work cooperatively and are matched with water flow control of the circulation assembly, stable operation of heating circulation is ensured, stable heating can be continuously provided for users, and the heating efficiency and effect are effectively improved.

The invention discloses an energy-saving type integrated large-temperature-difference absorption heat pump heat exchange unit capable of achieving intelligent water supplementing and cooling and a working method of the energy-saving type integrated large-temperature-difference absorption heat pump heat exchange unit, and relates to the technical field of heat exchange units, the energy-saving type integrated large-temperature-difference absorption heat pump heat exchange unit capable of achieving intelligent water supplementing and cooling comprises a large-temperature-difference absorption heat pump unit main body and an intelligent water supplementing and cooling main body, the large-temperature-difference absorption heat pump main body comprises a large-temperature-difference absorption heat pump, a first plate heat exchanger, a high-temperature side pipe network and a low-temperature side pipe network, and the intelligent water supplementing and cooling main body is provided with a water supplementing constant-pressure pump, a second plate heat exchanger, a water supplementing tank, a water supplementing pipeline and pipeline accessories. On the premise that the heat supply requirement of the large-temperature-difference absorption heat pump unit body is met, the return water temperature of the high-temperature side is further lowered, the supply and return water temperature difference of a high-temperature-side pipe network is increased, the heat conveying capacity of the high-temperature-side pipe network is improved, supplemented water of the low-temperature side can be preheated, and therefore the heat exchange efficiency of a whole heat exchange system is improved; and the whole heat supply system finally achieves the purposes of energy conservation, consumption reduction and carbon reduction.

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.

The utility model provides a vacuum-pumping system which comprises a vacuum pump, an oil stopper, an ejector, a gas collection tank and a gas-liquid separator, the vacuum pump is connected with the oil stopper through a vacuum-pumping connecting pipe, the oil stopper is connected with a barrel of an absorber, the oil stopper is connected with the gas collection tank through a first connecting pipe, and the gas collection tank is connected with the ejector through a second connecting pipe. The gas collecting tank is connected with the upper end of the gas-liquid separator through a second connecting pipe, a gas-liquid mixing outlet of the ejector is connected with the gas-liquid separator, and the ejector is connected with a barrel of the absorber. According to the vacuumizing system, the lithium bromide absorption heat pump / refrigerating machine can keep good vacuum performance, and therefore the performance and the service life of components of a unit are guaranteed.