466results about "Machines using waste heat" patented technology

The utility model provides a peak-shaving steam supply system for deep waste heat utilization of a thermoelectric unit, which deeply recovers cold end waste heat and flue gas waste heat of a cogeneration unit, is coupled with a two-stage compression heat pump, extracts waste heat to heat demineralized water, and serves as a primary heat source for supplying industrial steam, so that the waste heat participates in external heat supply; the superheater utilizes the generating capacity of the unit to enable industrial steam to reach steam supply parameters, the waste heat of the unit and the generating capacity are combined for external steam supply, the circulating heat efficiency is improved, the steam supply capacity is improved, meanwhile, the on-grid electricity is reduced, thermoelectric decoupling is achieved, the unit adjusting operation interval is expanded, the operation cost and pollutant emission are reduced, and peak regulation or spot transaction earnings are improved. And a clean, low-carbon, flexible, efficient, economical and energy-saving combined heat and power generation system is constructed.

The utility model relates to the technical field of acid pickling waste liquid resourceful treatment and regeneration, in particular to a tail gas waste heat utilization system of a mixed acid waste liquid treatment system, which is used for treating mixed acid waste liquid and discharging high-temperature tail gas and comprises a first heat exchanger, a second heat exchanger and a refrigerating mechanism. A first heat exchange circulating water path is arranged between the first heat exchanger and the refrigerating mechanism; the first heat exchanger provides a heat source for the refrigerating mechanism by using tail gas heat and reduces the water temperature of the first heat exchange circulating water path by means of the refrigerating mechanism; a second heat exchange circulating water path is arranged between the second heat exchanger and the refrigerating mechanism. The second heat exchanger is further connected to a circulating pipeline of the mixed acid waste liquid treatment system so as to reduce the temperature of circulating liquid. Through the tail gas waste heat utilization system, flue gas waste heat of the mixed acid waste liquid treatment system is effectively recycled, and energy waste is reduced; and the second heat exchanger reduces the circulating liquid temperature of the mixed acid waste liquid treatment system and improves the oxidation efficiency of the flue gas.

The invention discloses a waste heat recovery strategy analysis method and related equipment, and the method comprises the steps: firstly obtaining the flow and inlet temperature of each waste heat medium, and calculating the theoretical waste heat recovery power hour by hour in combination with environmental parameters and discharge temperature limitation; an energy conversion model is established based on the power and the equipment performance parameters, and a cascade framework is constructed according to the waste heat grade; and finally, by taking system energy efficiency maximization as a target, establishing an optimization model containing multiple types of constraints for solution, and obtaining an optimal equipment configuration and operation strategy. According to the cascade structure, efficient matching of waste heat and equipment is achieved, and recycling waste caused by mismatching is avoided; variable heat utilization requirements can be dynamically responded through hourly calculation and load constraint, and accurate space-time matching of waste heat and the requirements is achieved; the multi-constraint model enhances the multi-target optimization capability and makes up for the optimization deficiency in the prior art; the system planning process solves the problem of systematicness shortage of an existing method, the waste heat potential is effectively excavated, and the efficiency of the waste heat utilization comprehensive energy system is improved.

The invention provides a heat supply method and system utilizing waste heat resources and a control device, and relates to the field of heat exchange. According to the heat utilization required temperature and the grade and temperature of the waste heat return water, when the waste heat return water does not meet the heat utilization required temperature, the heat pump unit is started to heat the waste heat return water and then provide the waste heat return water for heat utilization equipment for use, and water flow on the evaporation side of the heat pump unit exchanges heat with dead steam; therefore, various waste heat resources of different grades and different forms are cooperatively utilized, and the utilization efficiency of energy is improved.

The invention discloses a green data center key cooling system, and relates to the technical field of data center energy saving and heat management. The system comprises a cabinet, a cold and hot channel, a refrigeration device, a waste heat recovery device and a control system. The refrigeration device comprises an indoor refrigeration unit, an outdoor heat dissipation unit and a fluorine pump energy-saving unit, and heat exchange and cooperative operation are achieved through pipelines. The cold and hot channel is provided with a guide plate and an adjustable air valve to optimize airflow distribution; the waste heat recovery device comprises a fluorine-fluorine heat exchanger, a heat pump system and a circulating medium box, and recovery and reutilization of heat energy are achieved. The control system integrates a lightweight edge AI module, constructs a multi-stage temperature sensing and load prediction mechanism, dynamically adjusts the power output of each cooling unit, and supports redundant fault-tolerant switching. The system intelligently switches the operation modes of the fluorine pump and the heat dissipation unit based on the external temperature and the thermal load prediction result, energy consumption is effectively reduced, and the energy efficiency ratio is increased.

A gas-fired heat pump unit that directly utilizes engine waste heat and features adjustable air supply is disclosed. The condenser and water supply and return lines are combined with refrigerant and coolant heat exchange lines. Refrigerant flows from the quasi-two-stage compressor outlet through the refrigerant heat exchange line, dividing it into a main path and an auxiliary path. The auxiliary path connects to the quasi-two-stage compressor air supply port after passing through a first electronic expansion valve and a flue gas heat exchanger. The main path, switched by a four-way reversing valve, can control forward and reverse circulation between the second electronic expansion valve and the outdoor evaporator. The outlet is connected to the quasi-two-stage compressor inlet. Coolant flows from the gas engine outlet through a coolant circulation pump and the coolant heat exchange line back to the inlet. The gas engine exhaust port is connected to the flue gas heat exchanger. Compressor air supply is simple and highly adjustable. The condenser utilizes stepped heating to decouple engine waste heat from compressor power. Heating is continuous during reverse cycle defrosting, improving indoor thermal comfort.

The invention relates to a system for thermal recovery from gaseous effluents operating in an open cycle, using said gaseous effluents as a working fluid and comprising a compression section, comprising at least one compressor (11) preferably driven by an electric motor (10), said compressor sucking gaseous effluents from a stream of hot residual gases and compressing the same effluents with consequent rise in temperature of said compressed gaseous effluents, a heat transfer section, comprising a secondary heat recovery circuit and a heat exchanger (13) for the thermal transfer to a carrier fluid (7), circulating in said secondary circuit, of thermal energy taken from said compressed gaseous effluents and for the consequent cooling of the same, an expansion section, comprising at least one expander (14) for a further recovery of energy released by expansion and converted into mechanical or electrical form after cooling by said heat exchanger (13), a discharge section (60) for the discharge of at least part of said gaseous effluents. The invention also has as its object a method of recovering part of the energy contained in the form of heat in gaseous effluents through a plant operating in an open cycle.

The invention relates to a heat pump device that makes it possible to utilize waste heat from technical processes or from the environment to simultaneously generate useful steam (12) and useful heat. The heat pump device comprises a heat pump module (1), a low-pressure steam generator (2) for generating low-pressure steam (11), a steam jet compressor (3) for generating useful steam (12) from high-pressure steam (10) and the low-pressure steam (11), and a first heat exchanger (4) for providing the useful heat. The heat pump device is suitable for applications where there is a simultaneous demand for both steam and heat.

The utility model relates to a solar energy and biomass energy coupled combined heat and power generation system which comprises an air preheater, a biomass boiler, a PV / T, a solar vacuum tube collector, a first-stage organic Rankine cycle assembly, a second-stage organic Rankine cycle assembly and a jet type refrigeration cycle assembly. A fluid outlet of the PV / T is connected with a fluid inlet of the solar vacuum tube collector, a smoke outlet of the biomass boiler is connected with a hot fluid inlet of the air preheater, and a cold fluid outlet of the air preheater is connected with an air inlet of the biomass boiler. According to the utility model, by designing a two-stage organic Rankine cycle structure, solar energy and biomass energy are better coupled, and the stability of the system is improved.

The invention relates to a boiler flue gas heat recovery system which comprises a heat supply device, the heat supply device comprises a boiler and a heat supply pipeline, the heat supply pipeline comprises a boiler water inlet pipe and a boiler water outlet pipe which communicate with the boiler, a flue is formed in a smoke exhaust device, and a first heat exchanger and a second heat exchanger are sequentially arranged in the flue in the flue gas flowing direction; the first waste heat recovery device comprises a first waste heat recovery flow path and a heat pump, the first waste heat recovery flow path is connected with the first heat exchanger and a boiler water inlet pipe, the heat pump is arranged on the first waste heat recovery flow path, the second waste heat recovery device comprises a second waste heat recovery flow path, and the second waste heat recovery flow path communicates with external air and a boiler. By arranging the heat pump, on one hand, the heat transfer temperature difference can be increased, smoke sensible heat and even part of latent heat can be efficiently recycled, on the other hand, the recycled heat can be flexibly adjusted according to changes of boiler loads, and therefore the system can adapt to changes of loads output by the system under different conditions.

The invention discloses a wet flue gas heat exchange system for a thermal power plant boiler, and relates to the technical field of thermal power plant energy conservation and emission reduction, the system comprises a desulfurization tower, a flue gas heat exchange device, a chimney, a sensing layer, a decision-making layer and an execution layer, the sensing layer collects smoke, environment, working medium and equipment all-parameter data and preprocesses the data into a state data queue, the decision-making layer predicts the future state of the system through a long-short-term memory network model and generates an optimal control strategy in combination with a dynamic matrix control algorithm, and the execution layer adjusts actions of components such as graded spraying and a variable-frequency heat pump. And meanwhile, the system adapts to working condition changes depending on a closed-loop self-learning mechanism, self-adaptive response to variable working conditions can be achieved, waste heat recovery and energy consumption are optimized while the white elimination effect is guaranteed, the net energy consumption of the system is reduced, and the system is suitable for thermal power plant boiler flue gas treatment.

The invention provides a multi-mode combined cooling and power generation system based on efficient waste heat utilization and an operation method of the multi-mode combined cooling and power generation system. The multi-mode combined cooling and power generation system comprises an organic Rankine cycle and absorption type refrigeration cycle integrated low-grade cold energy production mode and an organic Rankine cycle and vapor compression type refrigeration cycle integrated medium-grade cold energy production mode. A high-grade cold energy production mode integrating organic Rankine cycle, absorption type refrigeration cycle and vapor compression type refrigeration cycle is adopted, in order to achieve gradient utilization of waste heat, the system considers the waste heat utilization sequence of thermodynamic cycle at the same time, and the waste heat is firstly utilized by the absorption type refrigeration cycle and then recovered by the organic Rankine cycle; waste heat is recycled through the organic Rankine cycle and then is utilized by the absorption type refrigeration cycle, and the waste heat is simultaneously recycled by the absorption type refrigeration cycle and the organic Rankine cycle after being shunted. Efficient cogeneration of cold electricity is achieved through gradient utilization of waste heat and heat-work coupling between circulation, multiple possibilities of a waste heat utilization path are considered, and the waste heat recovery rate is increased.

The invention provides a compound evaporator coupled with multiple heat sources, and a heat pump system thereof. The use efficiency of a heat pump and the energy utilization rate are improved while the coupled use of the multiple heat sources is achieved; meanwhile, flue gas waste heat can be recycled, and purification is achieved; and the side of the evaporator is prevented from being frosted effectively. The compound evaporator comprises a shell, and flanges arranged at the two ends of the shell; the shell comprises an outer shell and an inner shell; a spiral refrigerant flow channel is arranged in a clearance between the outer shell and the inner shell; an inside cavity of the inner shell forms a coupled working medium flow channel, and the two ends of the inner shell are provided witha coupled working medium inlet and a coupled working medium outlet separately; the outer side of the outer shell is provided with a plurality of flue gas cooling fins, and a flue gas channel used forheat exchange is formed between the adjacent flue gas cooling fins; and the two ends of the outer shell are separately provided with a refrigerant inlet and a refrigerant outlet which communicate withthe refrigerant flow channel.

The utility model relates to the technical field of energy conservation and emission reduction, in particular to a waste heat refrigerating system suitable for dynamically synthesizing green ammonia. A synthetic ammonia reaction system; a waste heat boiler; cooling the condenser system; a product recovery system; a waste heat refrigerating unit; and the connection relationship among the systems is limited. According to the waste heat refrigerating system suitable for dynamically synthesizing the green ammonia, the low-pressure steam waste heat refrigerating technology can be utilized, direct conversion between the cold end and the hot end is completed, coupling between fluctuating steam yield and fluctuating cold demand is achieved, and meanwhile the concept and the production principle of green hydrogen and green ammonia are met.

The invention relates to the technical field of waste water heat recovery. The invention discloses a waste water heat recycling device, method and system for a public kitchen dish washing machine. Comprising a data collection module used for reading, collecting and storing related data of waste water waste heat recovery of a public kitchen dish-washing machine and operation of a water heating system; the control module is used for controlling the water tank to supplement water and controlling the indirect sewage source heat pump unit to start and stop; and the waste heat recycling and water heating module is used for recycling waste heat and storing and preparing hot water. Heat of waste water discharged from the dish-washing machine to the oil separation tank is extracted through heat exchange, tap water is heated through the indirect sewage source heat pump unit and supplied to the dish-washing machine, and electric energy consumed by heating the tap water when the dish-washing machine works is reduced. Through the combination of the data collection module and the control module, the system can recycle heat in wastewater in the oil separation tank as much as possible on the premise of ensuring that the water temperature in the oil separation tank is not too low and ensuring the drainage safety.

The invention relates to the technical field of comprehensive energy utilization, and provides a comprehensive energy system utilizing LNG (Liquefied Natural Gas) multi-energy complementary comprehensive output, which comprises an LNG cold energy utilization system, a methane cracking hydrogen production system, a power generation and power supply system, a waste heat centralized utilization system and a product supply system. A natural gas direct cracking hydrogen production technology, an LNG (Liquefied Natural Gas) cold energy utilization technology and a waste heat utilization technology are mainly utilized to realize natural gas state conversion, hydrogen production and hydrogen pre-cooling, and liquid hydrogen is prepared by utilizing a multi-stage circulating hydrogen cooling technology; meanwhile, by-product carbon of the methane cracking hydrogen production technology can be used as a high-purity carbon raw material after being captured and processed, and is used for processing various by-products. The system has the advantages of comprehensive energy resource output, extremely low carbon comprehensive emission and pollutant emission, cold and hot energy comprehensive regulation and control, energy safety guarantee and the like, and zero-carbon liquid hydrogen can be provided in a more energy-saving and environment-friendly manner.

The invention discloses an absorption refrigeration system based on combined driving of solar energy and waste heat of a data center. The absorption refrigeration system comprises a multi-energy complementary heat collection circulation module and an absorption refrigeration circulation module. The multi-energy complementary heat collection circulation module comprises a solar heating unit, a liquid cooling cabinet and a plate heat exchanger. And the solar heating unit and the liquid cooling cabinet are respectively connected with the plate heat exchanger. And the absorption refrigeration cycle module is connected with the multi-energy complementary heat collection cycle module. The absorption type refrigeration cycle module comprises an absorption type refrigeration cycle generator, a gas-liquid separator, a condenser, an evaporator, a mixer, an absorber and a solution exchanger. And the absorption refrigeration cycle generator is connected with the plate heat exchanger and the gas-liquid separator. And the gas-liquid separator is connected with the condenser and the solution exchanger. And the condenser is connected with the evaporator. The mixer is connected with the solution exchanger, the evaporator and the absorber. And the absorber is connected with the absorption refrigeration cycle generator. Dependence on external energy can be reduced, and the energy utilization efficiency is improved.

The invention discloses a future computing-oriented super-node cluster liquid cooling efficient computing platform and a resource management method thereof. A CPU, a GPU and a reserved photon / quantum accelerator slot in a super node are virtualized into a computing resource pool through a unified heterogeneous resource abstraction layer, and a CXL large-capacity memory and an NVMe-oF storage are virtualized into a cross-node memory resource pool and a storage resource pool respectively; the physical state of the super node cluster, the temperature-flow distribution of the liquid cooling heat dissipation system and the operation parameters of the heat recovery system are mapped in real time in the digital twin system; the intelligent scheduler takes task completion time, cluster total power consumption and waste heat recovery efficiency as a joint optimization target, and decomposes the task based on a virtual model; and in the task execution process, the energy efficiency cooperative controller adjusts the operation frequency of the allocated resources and the rotating speed of the liquid cooling pump in real time according to the node temperature change predicted by the digital twin model, so that the task performance, the energy consumption and the heat dissipation capability are globally matched.

The present invention relates to an energy system (1) and a method for operating the energy system (1), which comprises a hydrogen production unit (2) with at least one electrolyzer (3) for water electrolysis thermally coupled to a cooling water circuit (4), and a heat pump (5) whose heat source side (6) is thermally coupled to the cooling water circuit (4) and whose heat sink side (7) is connected to a district or commercial heating circuit (10) via a heat exchanger (8). According to the invention, a heat storage device (9) is provided in the district or commercial heating circuit (10), whose return line (11) is connected after the heat exchanger (8) and whose feed line (12) is connected before the heat exchanger (8) of the heat pump (5), so that the return temperature of the district or commercial heating circuit (10) is increased by heat from the heat storage device (9).

The invention discloses a cooling circulation system with a waste heat utilization function, and relates to the technical field of cooling systems.The cooling circulation system comprises a cooling box shell and a cooling box inner container embedded in the cooling box shell, and a partition plate is fixedly arranged in the cooling box shell and located at the front end of the cooling box inner container; the preheating cylinder is rotatably mounted in the cooling box inner container, the filtering part of the preheating cylinder is inserted into the preheating cylinder through the rear end of the cooling box shell, and the circulating cooling pipe is located in the cooling box inner container. Heat of liquid to be cooled is transferred to water in the inner container, heated hot water is collected through the preheating barrel and conveyed through the drainage pipe to be directly supplied to factory heating, shower rooms and other terminals, resource utilization of waste heat in the cooling process is achieved, and heat waste is avoided.

According to the energy utilization system based on steam gradient utilization and waste heat recovery, one part of steam generated by a steam generation device flows into a first user port, and the other part of the steam flows into a first ejector through a working fluid inlet of the first ejector; condensed water generated by the steam in the pipeline enters the flash evaporator; an outlet of the first user port is connected with a working fluid inlet of the first ejector, a flash gas outlet is connected with a driving fluid inlet of the first ejector, and an outlet of the first ejector is connected with the second user port; and the flash liquid outlet is connected with a driving fluid inlet of the first ejector, an outlet of the first ejector is connected with the hydraulic turbine, and an outlet of the hydraulic turbine is connected with the third user port. Therefore, different users can use the flash evaporation system through different ports according to requirements, step-by-step release and utilization of energy are achieved, in addition, the system can utilize waste heat of flash evaporation steam which is emptied originally, and the energy utilization rate of the system is improved.

The present invention discloses an adjustable large-temperature step-cross phase-change heat storage mixed working fluid high-temperature heat pump system, which belongs to the technical field of high-temperature heat pump systems. It includes a high-temperature heat pump circulation module and an open water supply module; the high-temperature heat pump circulation module is a circulation loop on the working fluid side, including a compressor, the working fluid side of three condensers, two gas-liquid separators, an evaporator and the working fluid side of three heat accumulators, and the circulating working fluid is an environmentally friendly binary non-azeotropic mixture; the open water supply module is an open loop on the water side, including a water pump, the water side of three condensers and the water side of three heat accumulators, and the working fluid on the water side is water. The present invention has three working conditions, namely direct heating working condition, heat accumulator heat storage working condition, and heat accumulator heat release working condition; the direct heating working condition achieves a reduction of irreversible losses by at least 14%; the heat accumulator heat storage working condition achieves a reduction of irreversible losses in the heat exchange process by at least 9%; the heat accumulator heat release working condition achieves an effective reduction of irreversible losses in the heat release process by at least 31%, thereby improving energy utilization.

To provide an air conditioning system that effectively regulates the heat of exhaust air and discharges temperature-controlled exhaust air to the outside. [Solution] The present invention comprises an outdoor unit, an indoor unit, a first refrigerant piping for circulating refrigerant between the outdoor unit and the indoor unit, a third heat exchanger for heating or cooling exhaust air discharged from the exhaust port of the outdoor unit, wherein the exhaust air heated or cooled in the third heat exchanger is discharged outside the air conditioning system, and a second refrigerant piping for circulating a portion of the refrigerant between the outdoor unit and the third heat exchanger so that the heating or cooling in the third heat exchanger is performed using a portion of the refrigerant that has been heat-exchanged with outside air in the first heat exchanger.

The invention relates to a refrigerating system and method for recovering coking high-temperature condensed water waste heat coupling steam temperature adjustment. The refrigerating system comprises a crude benzene distillation unit, an ammonium sulfate unit, an ammonia distillation unit, a three-section type gas primary cooler, a condensed water heat exchanger, a steam heat exchanger, a waste heat water type refrigerating machine and a condensed water recovery water tank. The problem that a refrigerating station needs to be provided with a waste heat water type refrigerating machine and a steam type refrigerating unit due to the fact that waste heat of waste heat water of the primary cooler is insufficient can be solved while waste heat of high-temperature condensed water of a coking plant is recycled, the temperature of the waste heat water is increased through the steam heat exchanger, and then the heat exchange efficiency of the refrigerating machine is improved; the total investment is reduced, and the operation cost is saved.

The present invention discloses a waste heat recovery and energy-saving system for combined cooling and heating, comprising a first hot water tank, a second hot water tank, a first heat pump unit, a second heat pump unit, a conversion water tank, a shell-and-tube heat exchanger, and a spiral pre-cooling tank. The first hot water tank is connected to the first heat pump unit via an electric temperature-sensing valve and a circulating water pump. The first hot water tank is connected to the second heat pump unit via an electric temperature-sensing valve and a circulating water pump. The first heat pump unit is connected to the shell-and-tube heat exchanger via the circulating water pump, and the first outlet of the shell-and-tube heat exchanger is connected to the second inlet of the first heat pump unit. The second outlet of the second heat pump unit is connected to the first inlet of the conversion water tank via an electric temperature-sensing valve, and the first outlet of the conversion water tank is connected to the second inlet of the second heat pump unit in turn via the electric temperature-sensing valve and the circulating water pump. The present invention fully recovers the low-grade condensation heat of the heat pump unit, maximizing waste heat recovery, and can simultaneously supply cold water and hot water for process production.

The invention relates to the technical field of air conditioners, in particular to an energy-saving anti-explosion air conditioner which comprises a compressor, an evaporation tank, a first liquid storage tank, an electronic expansion valve and a condensation tank which are sequentially connected, the evaporation tank is connected with an industrial waste heat energy storage subsystem, and the evaporation tank is used for evaporating liquid industrial raw materials into gaseous industrial raw materials; the industrial waste heat energy storage subsystem comprises a first heat exchanger and a heat storage tank, the first heat exchanger is connected to a high-temperature industrial waste heat source, the condensation tank is connected with a cold source energy storage subsystem, the condensation tank is used for condensing gaseous industrial raw materials into liquid industrial raw materials, and the cold source energy storage subsystem comprises a second heat exchanger and a cold storage tank. The second heat exchanger is connected to a low-temperature industrial waste heat source and a natural cold source, original waste industrial waste heat is changed into a precious heat source to be directly utilized or heat is recycled through the air conditioning unit to be utilized, acting of a compressor is reduced, the COP of the system is remarkably improved, in addition, low-energy-consumption refrigeration is achieved when the temperature of seawater is low, and energy is saved. And the operation cost is greatly reduced.

An air-conditioning apparatus includes an outdoor unit including a compressor configured to compress refrigerant, a relay unit connected to the outdoor unit, and an indoor unit connected to the relay unit. The compressor is driven to circulate the refrigerant between the outdoor unit, the relay unit, and the indoor unit. The air-conditioning apparatus includes a supplementary heat source unit in parallel with the indoor unit and connected to the relay unit. The outdoor unit includes an outdoor heat exchanger configured to exchange heat between the refrigerant flowing through the outdoor heat exchanger and a fluid. The supplementary heat source unit includes a supplementary heat exchanger configured to exchange heat between the refrigerant flowing through the supplementary heat exchanger and hot water.

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.

In order to solve the problem that waste heat cannot be fully utilized due to the fact that an existing jet refrigeration device adopts a single steam generator, the device utilizing the waste heat to refrigerate comprises a plurality of steam generators, and the steam generators are sequentially connected in series. Each steam generator is further connected with an ejector, and the ejectors are connected through a cooler. The multiple steam generators are sequentially connected in series, flue gas waste heat can sequentially pass through the multiple steam generators, in this way, each steam generator can generate steam through the flue gas waste heat, the multiple steam generators can generate steam of different temperatures and pressure grades, and due to the fact that each steam generator is connected with the corresponding ejector, the steam of different temperatures and pressure grades can be generated. Therefore, steam with different temperatures and pressure grades generated by the multiple steam generators can be used as a power source of the multi-stage ejector, waste heat can be recycled to the maximum extent to generate steam, and the recycled steam with different pressures is fully used as an ejection power source.

The utility model discloses a blast furnace slag flushing water waste heat utilization system, and relates to the technical field of blast furnace waste heat utilization. The blast furnace is provided with at least two slag outlets; the multiple heat exchange stations are connected with the at least two slag outlets in a one-to-one correspondence mode, each heat exchange station is provided with a hot inlet, a hot outlet, a cold inlet and a cold outlet, the hot inlets and the hot outlets are communicated with the slag outlets, and the multiple heat exchange stations are connected in series through the cold inlets and the cold outlets; the cold inlet of the heat exchange station located at the head end of series connection is controllably communicated with the outflow port, and the cold outlet of the heat exchange station located at the tail end of series connection is controllably communicated with the inflow port. The heat exchange stations correspondingly connected with the slag outlet are arranged in series, so that when the slag outlet of the blast furnace discharges slag alternately, slag water heat can be continuously extracted for waste heat utilization all the time, and meanwhile, the influence of slag water temperature change on target equipment when the slag outlet discharges slag alternately is reduced.