330 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 present invention discloses a heat pipe type air conditioning system for mine, comprising: a heat source collection component, including: a high-temperature electromechanical equipment heat dissipation cover configured with a nanofluid heat pipe connected to a pulsating heat pipe group; a medium-temperature mine water heat exchanger and a low-temperature return air passage heat exchange plate, which are connected to a phase change energy storage tank through the pulsating heat pipe group; a wellhead anti-freezing component, including a heat dissipation fin group connected to the nanofluid heat pipe; an underground temperature control component, including an absorption heat pump, a radiation panel, a dehumidification fresh air unit and a variable-frequency fan, wherein the input end of the absorption heat pump is connected to the nanofluid heat pipe and the phase change energy storage tank, and the output end is connected to the radiation panel, the dehumidification fresh air unit and the heat dissipation fin group, and the input end of the variable-frequency fan is connected to the radiation panel and the dehumidification fresh air unit, and the output end is led into the underground roadway; an intelligent control component includes a controller, which collects the data of each sensor in real time and realizes the control of each component. The present invention realizes the coordination of waste heat recovery and air conditioning, ensures the safety of the mine and reduces energy consumption.

The invention discloses a water electrolysis hydrogen production and storage thermal management system and a working method thereof. A circulating water pipeline system comprises a first water supply pipeline, and a water chilling unit is connected with the first water supply pipeline; a resistance heater, a circulating water system of a fuel cell, a circulating water system of a water electrolysis hydrogen production device, a circulating water system of a solid hydrogen storage device and a second-class absorption heat pump are sequentially connected in series behind the first water supply pipeline; a cold water outlet of the second-class absorption heat pump is connected with a circulating water system of the water electrolysis hydrogen production device; the second-class absorption heat pump transfers heat into water in the first water supply pipeline; and temperature sensors are arranged in the water electrolysis hydrogen production device, the solid hydrogen storage device, the fuel cell, the water chilling unit, the resistance heater and the second-class absorption heat pump and are connected with a temperature control system. According to the scheme, the overall heat of the water electrolysis hydrogen production device, the solid hydrogen storage device and the fuel cell system is subjected to gradient utilization and centralized management, and the purposes of energy conservation and consumption reduction are achieved.

The invention discloses a multi-unit multi-mode cogeneration power station load distribution method based on an improved Harlisia eagle optimization algorithm, and belongs to the technical field of energy management and optimization. The method comprises the specific steps that an HPHHO model is established, and characteristic equations of units in different heat supply modes (single extraction, absorption heat pump and cylinder switching) are analyzed; fitting an energy consumption characteristic polynomial of each unit through variable working condition calculation; taking the minimum total coal consumption as an objective function, and constructing an electric heating load balance constraint and a unit operation domain non-balance constraint; and optimizing multi-unit load distribution by using HPHHO. The method is compatible with the thermoelectric coupling relation of a multi-mode unit, the optimization problem under complex constraints is effectively solved, and it is ensured that a load distribution result meets external requirements and is in a feasible operation domain. Experiments show that compared with traditional HHO, the improved algorithm has higher convergence speed and stability, the total coal consumption of the system is remarkably reduced, and the economical efficiency and the operation efficiency of the combined heat and power generation power station are improved.

The invention discloses an efficient absorption heat pump system with low start-stop frequency during variable load of a gas-fired boiler, and belongs to the technical field of absorption heat pumps. Comprising a multi-module absorption heat pump system, and a gas-fired boiler flue gas total heat recovery system, a heat storage and air regulation system and a flue gas condensate water and heat supply network return water heating system which are respectively connected with the multi-module absorption heat pump system; according to the efficient absorption type heat pump system with the low start-stop frequency during the variable load of the gas-fired boiler, a single generator and a single absorber of a traditional absorption type heat pump are changed into a generator set and an absorber set of three modules, and a heat storage and air regulation system is configured; the problems that COP of the absorption heat pump drops suddenly during load fluctuation, driving force is insufficient and a generator is overheated and shuts down frequently are solved while effective recycling of smoke latent heat is guaranteed, and the operation stability of the gas-fired boiler coupling absorption heat pump system is 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 utility model discloses a flue gas waste heat recovery system for a desulfurization slurry two-stage flash evaporation coupling absorption heat pump, and belongs to the technical field of coal-fired boiler waste heat heat supply. Flue gas deep waste heat recovery is carried out in a cascade flash evaporation and cascade heating mode, desulfurization slurry sequentially enters two stages of serial flash evaporation tanks to be subjected to pressure grading flash evaporation, and flash steam of a front flash evaporation tank enters a front heater to primarily preheat return water of a heat supply network; flash steam of the second-stage flash tank is fed into an absorption heat pump for second-stage waste heat recovery, the heat pump conducts second-stage heating on heat supply network return water subjected to primary preheating and supplies the heat supply network return water out, a large amount of non-condensable gas escaped from the flash steam in the condensation heat release process of a transverse evaporator of the absorption heat pump is discharged in a graded mode, firstly, the non-condensable gas is pumped out through a micro-differential-pressure vacuumizing device, and the non-condensable gas is pumped out through a micro-differential-pressure vacuumizing device; after being mixed with non-condensable gas of the front heater, the gas is discharged by the secondary vacuum pump, and the micro-differential-pressure vacuumizing device comprises one or more Roots compressors or negative-pressure ejectors. Compared with a conventional single-stage mode, the waste heat recovery amount of the system is doubled or above.

Provided are a boiler peak regulation and heat supply system and an operating method therefor. The boiler peak regulation and heat supply system comprises a heat pump assembly, a power generation assembly (3) and a boiler assembly; the heat pump assembly comprises a mechanical heat pump unit (1) and an absorption heat pump unit (2), at least one absorption heat pump unit (2) is provided, and the mechanical heat pump unit (1) is connected to the output end of the power generation assembly (3) by means of a clutch mechanism (4); the boiler assembly comprises a boiler unit (5) and a steam turbine unit (6) which are circulatively connected, the steam turbine unit (6) is connected to the power generation assembly (3) and the absorption heat pump unit (2), and heat generated by the boiler unit (5) during operation is separately transferred to the power generation assembly (3) and the absorption heat pump unit (2) by means of the steam turbine unit (6); when the clutch mechanism (4) is in a connected state, the power generation assembly (3) enables variable load by means of the mechanical heat pump unit (1).

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 present invention provides a design method and system for a flue gas waste heat recovery device, including: collecting on-site layout data of a power plant, constructing a heating equipment model of the power plant, using a deep neural network to perform feature extraction on the heating equipment model, obtaining several waste heat generation locations of the power plant and marking them in the heating equipment model, obtaining a waste heat distribution model, adding a preset virtual plate heat exchanger and a preset virtual absorption heat pump to the waste heat distribution model for performing a heat collection experimental simulation, obtaining an optimal heat collection scheme for the power plant, adding corresponding plate heat exchangers and absorption heat pumps to the power plant according to the preferred heat collection scheme, and adding corresponding heat collection supervision equipment to the power plant at the same time, respectively debugging the data transmission channels between each of the plate heat exchangers and the absorption heat pump and the preset heat collection supervision equipment, and generating a flue gas waste heat recovery device for the power plant.

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.

The invention discloses an absorption and compression high-temperature heat pump system with a synergistic ejector. The absorption and compression high-temperature heat pump system comprises a compression type heat pump, an absorption type heat pump and the ejector. The compression heat pump comprises a gas-liquid separator, a compressor, an intermediate heat exchanger and a working medium pump, a gas phase outlet of the gas-liquid separator, the compressor, the intermediate heat exchanger, the ejector and an inlet of the gas-liquid separator are sequentially connected, and the working medium pump is connected between a liquid phase outlet of the gas-liquid separator and the intermediate heat exchanger. A first outlet of the solution heat exchanger and an inlet of the expansion valve generator are sequentially connected, a first outlet of the generator is connected with the ejector, a second outlet of the generator is connected with an inlet of the solution pump, an outlet of the solution pump is connected with a second inlet of the solution heat exchanger, and a second outlet of the solution heat exchanger is connected with a second inlet of the absorber. The heat supply efficiency of the absorption heat pump can be improved, and the problems that due to the fact that the exhaust temperature of the compressor is too high, lubricating oil is cracked, and the high-temperature heat supply compression ratio is too large are solved.

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 air source and fuel gas hybrid heat pump system, and belongs to the technical field of heat supply. The system is provided with an air source heat pump and a steam type absorption heat pump; the energy storage water tank is connected between the air source heat pump and the steam type absorption heat pump, and the plate heat exchanger is connected between the steam type absorption heat pump and a heat consumer; wherein an outlet of the plate heat exchanger is connected with an inlet of the steam type absorption heat pump, then an outlet of the steam type absorption heat pump is connected with an inlet of the plate heat exchanger so as to form a loop, and an inlet and an outlet of the energy storage water tank are both communicated with a loop pipeline. The air source heat pump and the steam type absorption heat pump are organically combined, and efficient operation of the system under different load conditions is achieved by means of the dual energy advantages of off-peak electricity and steam.

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.

The present invention discloses a device for combined waste heat recovery, white smoke elimination and wastewater concentration. This device is used to solve the problems of waste heat recovery from power plant flue gas and wastewater concentration, and is composed of an absorption heat pump system, a wastewater concentration system, an evaporation and drying system, etc. This device utilizes the waste heat of flue gas from coal-fired power plants or other industries for wastewater concentration. The concentration process has little impact on the humidity of the flue gas, turns the wastewater into usable water, and finally transfers the recovered flue gas heat to the low-pressure heater system to achieve cascaded utilization of thermal energy. The highly concentrated wastewater after concentration and reduction can be sent to the evaporation and drying system, greatly reducing the heat required by the evaporation and drying system and reducing the impact on the unit. The entire system has the advantages of low energy consumption, low investment, and low operating costs.

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 utility model discloses a desorption tower kettle liquid waste heat utilization system based on an absorption heat pump principle, which is characterized in that a tower kettle liquid circulation loop comprises a first material pipe led out from a desorption tower kettle, and the first material pipe is used as a heated high-grade heat source and is connected to a waste heat utilization device; the waste heat flows out of the waste heat utilization device and is connected to the tower kettle through a second material pipe to form a closed loop; the barren amine liquid circulation loop comprises a barren liquid pipeline for pumping materials from the tower kettle of the desorption tower to the tower top of the absorption tower, and the barren liquid pipeline comprises a third material pipe entering the waste heat utilization device and a fourth material pipe flowing out of the waste heat utilization device. According to the desorption tower kettle liquid waste heat utilization system, on one hand, waste heat of lean amine liquid is recycled, the use amount of circulating water is reduced, on the other hand, low-grade heat sources in the lean amine liquid are recycled, materials in a desorption tower kettle are heated, low-grade waste heat is used for replacing a high-temperature heat source of a tower bottom reboiler through the waste heat recovery device, and the desorption tower kettle liquid waste heat utilization efficiency is improved. The process steam consumption of the reboiler at the bottom of the desorption tower is reduced, and a large amount of steam is saved.

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.