1623 results about "Heat recirculation" patented technology

A thermal management system for an electric forklift. The system includes a battery cooling circulation loop, a battery heating circulation loop, a cab cooling circulation loop, a cab heating circulation loop, a turn-on control unit, and a thermal management control module. The battery cooling circulation loop includes a battery cooling sub-loop and a refrigerant sub-loop. The battery cooling circulation loop and the refrigerant sub-loop are connected in parallel, and share an electric compressor and a condenser. The cab heating circulation loop and the battery heating circulation loop are connected in parallel, and share a heater and a second power unit. The turn-on control unit separately controls turn-on and turn-off of the loops. The thermal management control module controls the operation of the turn-on control unit and the loops according to battery temperature data in the electric forklift and / or a thermal management request inputted from the outside.

An aqueous stream cleaning system including a circulation pump to receive a waste fluid and / or a concentrated liquid bottoms stream, and expel a circulation stream. The aqueous stream cleaning system can also include a primary heat exchanger to receive the circulation stream from the circulation pump. The primary heat exchanger can have a plurality of heat exchange plates that define an internal surface area for heat transfer from a distillate stream to the circulation stream to produce a cooled distillate stream and a heated circulation stream. The plurality of heat exchange plates can be spaced to facilitate free flow of solids in the circulation stream between the plurality of heat exchange plates. A mass flow rate and pressure of the circulation stream can be configured to minimize build-up of solids in the primary heat exchanger. The aqueous stream cleaning system can further include an evaporation unit to receive the heated circulation stream from the primary heat exchanger. The distillate stream is formed when steam in the heated circulation stream evaporates in the evaporation unit, and the concentrated liquid bottoms stream is formed from a portion of the heated circulation stream that does not evaporate.

The embodiment of the invention provides an energy storage peak regulation system and method coupling waste heat recovery and water body heat storage. The system comprises a thermal power generation subsystem, a circulating water waste heat utilization subsystem, a water body heat storage subsystem and a heating subsystem. By recycling waste heat of circulating water, the heat efficiency of the unit can be improved under the same combined heat and power generation capacity, the coal consumption rate is reduced, and energy-saving and carbon-reducing transformation is assisted to be achieved. After the water body heat storage technology is coupled, the system can participate in peak regulation and peak service all the year round, and flexible transformation is assisted to be achieved; the diversified heat supply modes of steam extraction heat supply, circulating water waste heat recovery heat supply and heat storage water body heat supply assist in achieving heat supply transformation. The circulating water waste heat utilization technology and the water heat storage technology are deeply coupled with an existing combined heat and power generation unit, and energy-saving and carbon-reducing transformation, flexible transformation and heat supply transformation of the combined heat and power generation unit can be achieved at the same time.

The invention belongs to the technical field of refrigerants, and provides a mixed refrigerant for replacing R290 and a preparation method and application thereof, the mixed refrigerant comprises a first component, a second component and a third component; the first component is trans-1, 2-difluoroethylene, the second component is 2, 3, 3, 3-tetrafluoropropene, and the third component is trifluoromethyl methyl ether; compared with R290 refrigerants in the prior art, the mixed refrigerant has the advantages that flammable and explosive components do not exist, and high-risk combustible gas clusters cannot be formed due to density layering after leakage, so that the mixed refrigerant has high safety performance, and the safety level can be not lower than A2L; the mixed refrigerant has the environment-friendly characteristic of low GWP, the GWP is smaller than or equal to 150, and the environment-friendly requirement is met; the thermophysical property and the refrigeration and / or heating cycle performance of the mixed refrigerant are similar to or better than those of R290; the mixed refrigerant can be used for directly replacing an R290 refrigerant.

The invention provides a dynamic diversion system of a homogenizing furnace, and relates to the field of industrial heat treatment equipment. The dynamic flow guide system of the homogenizing furnace comprises an outer wall, a furnace body, a hearth, a high-heat circulating fan and a flow guide cover body, and the furnace body is arranged in the outer wall. According to the invention, temperature data of multiple areas in the hearth are collected in real time through a temperature sensor, and in combination with closed-loop control of a controller on a first positive and negative motor, dynamic adjustment of the rotation angle of a flow guide plate and mechanism design of an eccentric rotating shaft and a movable groove, rotation motion of the first positive and negative motor is converted into multi-angle swing of the flow guide plate; the dynamic deflection of the flow guide plate can respond to the change of a temperature field in real time, the airflow path limitation of fixed flow guide is broken, the stagnant airflow in the right-angle area of the hearth participates in circulation again, and the linkage control logic of the controller, the temperature sensor and the first positive and negative motor realizes the temperature-flow guide angle self-adaptive adjustment; therefore, the dynamic balance of the temperature field can be completed without manual intervention.

The invention discloses an automatic ash removal type thermal cycle supercritical CO2 flue gas heat exchanger which comprises a connecting frame, a first sealing cover and a second sealing cover are connected to the front side and the rear side of the connecting frame through bolts correspondingly, a dust suction assembly is arranged on the front side of the first sealing cover, and a heat exchange pipe is fixedly connected to the interior of the connecting frame; a plurality of heat conduction fins are fixedly connected to the heat exchange pipe, and one end of the heat exchange pipe is fixedly connected with a first air inlet pipe. According to the cleaning device, a servo motor drives a corresponding reciprocating lead screw to rotate, a cleaning assembly can be driven to reciprocate along a limiting rod through a mounting plate through transmission of a first chain wheel and a first chain, in the moving process of the cleaning assembly, an arranged gear is meshed with a rack, a corresponding rotating shaft can be driven to rotate, and through transmission of a second chain wheel and a second chain, the cleaning assembly is driven to rotate. And the rotating shafts can be driven to rotate, so that the connecting shafts arranged between the rotating shafts are driven to rotate, and the cleaning brushes can be driven to rotate to clean the exteriors of the heat exchange tubes and the heat conduction fins.

The invention relates to a liquid air energy storage and terrestrial heat coordinated underground space air regulation and control system and method. Comprising a first-stage compressor, a second-stage compressor, a third-stage compressor, an expansion refrigerator, a first-stage compression heat exchanger, a second-stage compression heat exchanger, a third-stage compression heat exchanger, a cold box, a separator, a liquid air storage tank, a cryogenic pump, an evaporator, a cold storage circulating pump, a cold storage box, a compression heat exchange circulating pump, a compression heat storage box, a first heater, a second heater and a third heater. The system comprises a first air expander, a second air expander, a third air expander and a generator. The regeneration heater is used for guiding the compression heat generated by the compressor into the regeneration heater for regeneration and / or guiding the geothermal energy output by the geothermal energy output end into the regeneration heater for regeneration; the rotary wheel dehumidification device is used for performing cryogenic drying on the wet air; the fresh air processing unit is composed of a fresh air filter, a regeneration fan, a regeneration filter and an air supply fan.

The invention discloses a low-temperature rectifying tower, and relates to the technical field of chemical equipment, the low-temperature rectifying tower comprises a tower body, a condensation circulating system arranged at the top of the tower body and a heat circulating system arranged at the bottom of the tower body, and further comprises a supporting column, a rectifying tower body, a rectifying tower cover and a rectifying tower cover, and the supporting column is supported at the central position in the tower body through a supporting frame; the tower plates are of hopper-shaped structures, the tower plates are arranged on the supporting column at intervals in the height direction of the supporting column, an opening of each tower plate faces the bottom of the tower body, a plurality of steam holes are formed in each tower plate, and a gap exists between the edge of each tower plate and the inner wall of the tower body; the baffle covers are in a hopper shape, the baffle covers are arranged between every two adjacent tower plates, through holes are formed in the centers of the baffle covers, gaps exist between the through holes and the supporting columns, the outer edges of the baffle covers are fixedly connected with the inner wall of the tower body, and the opening directions of the baffle covers face the top of the tower body. The heat and mass transfer efficiency of a gas phase and a liquid phase on the surface of the tower plate can be improved.

The invention provides an air conditioner, and belongs to the technical field of air conditioners. According to the method, the air conveying pipeline is thermally coupled with the evaporator and the condenser, the high-temperature air compressed by the air compressor module is cooled through refrigeration and heating circulation of the air conditioner, consumption of extra energy can be reduced, and the overall energy efficiency is improved. And meanwhile, the molecular sieve has higher working efficiency at a proper temperature, so that the design is beneficial to improving the oxygen production efficiency. The air conditioner can automatically adjust use of the air conveying pipeline according to the refrigerating mode and the heating mode, and the system can be flexibly adjusted according to the current operation mode through the design, so that the optimal cooling effect is achieved.

The invention provides an integrated heat recycling type catalytic micro-combustor for marine equipment and a preparation method, and relates to the technical field of clean fuel catalytic combustion under the microscale. The integrated heat recycling type catalytic micro-combustor comprises a micro-combustor shell, and two sets of symmetrically-arranged partition plates are arranged on the inner side of the micro-combustor shell; the two sets of partition plates divide the interior of the miniature combustor shell into a first preheating channel, a gas outlet channel and a second preheating channel, the gas outlet channel comprises a combustion chamber and a gas outlet which are sequentially communicated, a bluff body is arranged on the inner side of the gas outlet channel, and concave cavities are formed in the partition plates and correspond to the combustion chamber in position. The inner side of the air outlet channel and the outer side of the bluff body are coated with a catalyst; according to the invention, the preheating channel is arranged to set the micro-combustor to be in a backheating form, unburned gas in the micro-combustor is preheated by tail gas after gas intake, so that the gas obtains a higher initial temperature in the micro-combustor, and the design optimizes the high-speed limit of mixed gas in the micro-combustor, strengthens the heat cycle in the combustor and effectively reduces the heat loss.

The invention relates to the technical field of vehicles, and particularly discloses a direct contact type evaporative cooling electric drive system, an electric drive assembly and a vehicle. The electric drive system comprises a motor body, a motor inner cooling assembly, a cooling medium pumping assembly and a cooling medium heat exchange assembly; a phase-changeable cooling medium is directly conveyed into an electric drive and gasified after exchanging heat with a stator and a rotor to be heated, heat dissipation, cooling and liquefaction of the cooling medium are achieved through an external heat exchanger, the liquefied cooling medium is conveyed into a motor shell to be subjected to heat exchange circulation, and under the condition that the size of the electric drive is not increased, the cooling performance can be greatly improved; and the electric drive working performance can be effectively improved.

The invention provides a pot support, and relates to the technical field of gas cooks.The pot support mainly comprises a ring body, and the outer edge of the ring body is higher than the inner edge of the ring body so that a combustion area can be defined; an upper cavity and a lower cavity which are stacked and independent are formed in the ring body; the lower cavity is a closed cavity; an air inlet hole and an air outlet hole which are communicated with the interior and exterior of the upper cavity are formed in the cavity wall of the upper cavity to form a channel for high-temperature gas to flow; the air inlet and the air outlet are arranged away from each other; the air outlets face the through hole in the bottom of the ring body. According to the embodiment provided by the invention, part of generated high-temperature gas is sucked into the upper cavity from the air inlet holes in the high position, the high-temperature gas flows along the upper cavity, heat of the high-temperature gas is conducted through the cavity wall, the temperature of the whole pot support is greatly increased, the heated pot support directly conducts efficient heat conduction heating on a pot, and the heating efficiency is improved. And the high-temperature gas finally flows downwards and flows out from the gas outlet hole, and flows upwards and is sucked into the upper cavity, so that heat circulation is formed, and the overall heat efficiency is remarkably improved.

The utility model provides a liquid carbon dioxide energy storage refrigerating system. The liquid carbon dioxide energy storage refrigerating system comprises an energy storage system, a refrigerating system and a heat circulation system. The energy storage system comprises a low-pressure liquid storage tank, a first throttling pressure reducing valve, a first heat exchanger, a compressor, a second heat exchanger and a high-pressure liquid storage tank which are sequentially connected in a sealed mode. The refrigerating system comprises a high-pressure liquid storage tank, a second throttling pressure reducing valve, a third heat exchanger, a fourth heat exchanger and a low-pressure liquid storage tank which are sequentially connected in a sealed mode. The heat circulation system comprises a cold storage tank, the cold storage tank is coupled with the first heat exchanger through a circulation pipeline, and the cold storage tank is coupled with the fourth heat exchanger through a circulation pipeline. In the low peak period of electricity utilization, the electric energy is stored in the form of high-pressure liquid carbon dioxide. And the liquid carbon dioxide is gasified and cooled through pressure reduction of the second throttling pressure reducing valve so as to provide cold energy. And meanwhile, cold energy generated in the refrigeration process can be stored through the heat circulation system and used for cooling carbon dioxide in the energy storage process.

The utility model discloses a multi-system water chilling unit which comprises at least two heat exchange systems, at least two waterway systems and a combined heat exchanger, and the heat exchange systems can be combined to form or respectively form an independent heat exchange circulation loop by switching the serial or parallel connection state and the opening or closing state of the combined heat exchanger; the water path system can be combined to form or respectively form an independent water circulation loop, so that the heating or refrigerating capacity of the unit is obviously increased; different heat exchange circulation loops are switched and controlled by adjusting refrigerant flowing paths between the multiple heat exchange systems and the combined heat exchanger, and different water circulation loops are switched and controlled by adjusting water medium flowing paths of the multiple water path systems. Therefore, after the water chilling unit is installed, different operation modes can be selected and switched according to different heat or cooling capacity requirements, hot water or cold water with the corresponding capacity and temperature is produced, the heating or cooling capacity of the unit is matched with the actual requirement, the whole equipment or part of elements do not need to be replaced, cost is low, and maintenance is convenient.

The invention discloses a high-pressure heating assembly based on ceramic heating pipes, and belongs to the technical field of heating. The heating assembly comprises a shell, a heating cavity is formed in the shell, the heating assembly is arranged in the heating cavity, a control circuit board is arranged on the heating assembly, the heating assembly comprises a plurality of ceramic heating pipes, the plurality of ceramic heating pipes are of an electrical connection structure which is formed by connecting every two ceramic heating pipes in series and then connecting the ceramic heating pipes in parallel, and the ceramic heating pipes are MCH ceramic heating pipes; a hollow cavity is formed in one end of the interior of the ceramic heating pipe, and a first through hole and a second through hole which are staggered with each other are formed in the positions, located in the hollow cavity, of the two sides of the ceramic heating pipe. The first through hole and the second through hole are oppositely formed in the pipe body of the ceramic heating pipe in a staggered mode, so that thermal circulation liquid flows through the interior and the outer side of the ceramic heating pipe at the same time; the heat exchange efficiency of the heat circulation liquid is improved, meanwhile, the heat circulation liquid flows in from the hollow cavity of the ceramic heating pipe and then flows out from the first through hole and the second through hole, and air originally filled in the space of the inner wall of the ceramic heating pipe is exhausted more thoroughly.

The invention relates to the technical field of heat exchange systems, and discloses a control method and device for a heat exchange system and the heat exchange system. The heat exchange system comprises a heat exchange loop and a refrigerant adjusting branch, the refrigerant adjusting branch is connected with the heat exchange loop and is configured to adjust the refrigerant flow in the heat exchange loop, and a liquid storage cavity is defined by the refrigerant adjusting branch; the control method comprises the steps that the temperature difference value between the indoor temperature and the outdoor temperature is determined; refrigerant pressure in the liquid storage cavity is obtained; and the liquid storage volume of the liquid storage cavity is adjusted according to the temperature difference value and the refrigerant pressure. According to the embodiment, the amount of the refrigerant participating in heat exchange circulation in the heat exchange system can be adjusted, and the performance of the heat exchange system is improved.

The invention provides a porous medium combustor for stable combustion of ultralow-calorific-value gas, belongs to the technical field of combustors, and solves the problems that an existing combustor is low in heat recycling efficiency and air is not fully preheated before entering a combustion area. The combustor comprises a shell, a gradually-shrunk porous medium layer, a stable-combustion porous medium layer, a gradually-expanded porous medium layer, a premixing chamber, a fuel channel and an oxidizing agent channel, and the gradually-shrunk porous medium layer, the stable-combustion porous medium layer and the gradually-expanded porous medium layer are all located in the shell and are sequentially arranged from top to bottom; the premixing chamber is communicated with the lower part of the divergent porous medium layer; an outlet of the fuel channel is communicated with the premixing chamber; the oxidant channel surrounds the stable combustion porous medium layer and the divergent porous medium layer and is spirally arranged on the shell, an inlet of the oxidant channel is located above the stable combustion porous medium layer, and an outlet of the oxidant channel is communicated with the premixing chamber. The combustible limit of the low-heating-value fuel gas can be widened, stable and efficient utilization of the ultralow-heating-value fuel gas is achieved, and the heat recycling efficiency is improved.

The invention discloses a photovoltaic-heat pump cooperative energy storage system defrosting control method, device and system, electronic equipment and a storage medium, the photovoltaic-heat pump cooperative energy storage system comprises a heat storage module, a heat circulation pipeline and a plurality of electric heating modules, and the heat storage module outputs heat energy to an evaporator through the heat circulation pipeline for defrosting. On one hand, the photovoltaic unit supplies power to the electric heating module for defrosting, and the heat storage module outputs heat energy for defrosting, so that the dependence of defrosting on a power grid can be reduced, the supply proportion of the photovoltaic unit in defrosting energy consumption is increased, the electric charge expenditure is saved for a user, the carbon emission is reduced, the peak load of the power grid is relieved, and the energy utilization rate of the photovoltaic unit is increased; partial defrosting can be achieved by supplying power to part of the electric heating modules through the photovoltaic unit, global defrosting is achieved by outputting heat energy through the heat storage module, different defrosting modes are adopted in different frosting states, the energy efficiency of the system is improved, and defrosting can be achieved through the heat storage module when the generating capacity of the photovoltaic unit is low in extreme weather.

The invention provides an electronic-grade hydrofluoric acid rectification heat exchange device, and relates to the field of heat exchange devices.The electronic-grade hydrofluoric acid rectification heat exchange device comprises a cold recovery box, the surface of the cold recovery box is provided with a hot backflow pipe and a hot circulation box, a plurality of mass transfer boxes are arranged above the cold recovery box, a plurality of mass transfer bottles are fixedly connected to the interiors of the mass transfer boxes, and the tops of the mass transfer boxes are fixedly connected with a top plate; a plurality of adjusting holes are uniformly formed in the surface of the top plate, adjusting boxes are arranged in the mass transfer boxes, high-corrosion-resistance air bags are symmetrically arranged on the surfaces of the adjusting boxes, adjusting blocks are arranged in the adjusting boxes, rotating pipes are arranged in the mass transfer bottles, and stirring paddles are arranged on the surfaces of the rotating pipes. The efficiency and the stability of the hydrofluoric acid rectification heat exchange device are improved, the adaptability of the device to the production scale and different raw materials is improved, and the energy consumption is reduced.

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 heat preservation device for energy storage of an air compressor of a refrigeration station and a heat preservation method of the waste heat heat preservation device, relates to the related field of heat exchangers and aims to solve the problems that when hot air is circulated and output in the prior art, water is heated, the temperature of the hot air is reduced, the temperature difference between the water and the hot air is small, and heat exchange efficiency is low. The temperature of the water body close to the hot air input end is different from that of the water body close to the hot air output end, and waste heat of the air compressor cannot be fully utilized. The waste heat recycling pipeline comprises a first heat exchange circulating pipe, a first air inlet branch pipe is formed in a pipe body of the upper portion of the front end of the first heat exchange circulating pipe, and a first air outlet branch pipe is formed in a pipe body of the upper portion of the rear end of the first heat exchange circulating pipe. The waste heat recycling pipeline further comprises a second heat exchange circulating pipe, a second air inlet branch pipe is formed in a pipe body on the lower portion of the rear end of the second heat exchange circulating pipe, and a second air outlet branch pipe is formed in a pipe body on the lower portion of the front end of the second heat exchange circulating pipe.

The invention discloses a heat pump unit with an energy recovery function, and belongs to the technical field of heat pumps, the heat pump unit comprises a machine shell, a heat circulation mechanism, a fan, a condensation box and a waste heat recovery box are arranged in the machine shell, and a circulation conveying mechanism and a driving mechanism are arranged on one side of the waste heat recovery box; the circulating conveying mechanism comprises a compression box and a piston plate; the driving mechanism comprises a driving motor, a driving shaft, a guide rail and a rotating shaft. By integrating the heat circulation mechanism, the waste heat recycling box and the circulation conveying mechanism, the energy utilization efficiency is remarkably improved, in the operation process of the heat pump unit, the compressor compresses a low-temperature and low-pressure gas-state refrigerant into high-temperature and high-pressure gas, the condenser transmits heat to water in the condensation box, and therefore the heat pump unit is cooled. Meanwhile, a waste heat recovery box further recovers residual heat of the refrigerant, gradient utilization of energy is achieved, a fan enhances air circulation and improves heat exchange efficiency, and a temperature sensor and a controller dynamically adjust system operation parameters to ensure that the temperature of hot water is stable.

The invention belongs to the technical field of hydrogen energy, and particularly relates to a solid hydrogen storage system with two charging and discharging ends and a working method.The solid hydrogen storage system comprises at least two independent solid hydrogen storage units, and each solid hydrogen storage unit independently communicates with an upstream hydrogen supply pipeline through a first valve set and independently communicates with a downstream hydrogen using pipeline through a second valve set; each solid hydrogen storage unit is selectively communicated with the thermal circulation loop or the cold circulation loop through a third valve group; the first valve group, the second valve group and the third valve group are controlled, so that when the upstream hydrogen supply pipeline has a hydrogen supply demand and the downstream hydrogen use pipeline has a hydrogen use demand, the first solid hydrogen storage unit is configured to be in a hydrogen charging mode, and meanwhile, the second solid hydrogen storage unit is configured to be in a hydrogen discharging mode; the solid hydrogen storage unit in the hydrogen charging mode is communicated with the upstream hydrogen supply pipeline and the cold circulation loop for charging hydrogen, and the solid hydrogen storage unit in the hydrogen discharging mode is communicated with the downstream hydrogen supply pipeline and the hot circulation loop for discharging hydrogen.

The invention relates to the technical field of semiconductor etching machine accessory equipment cooling control, and discloses a low-temperature cooling control method for semiconductor etching machine accessory equipment, and the method comprises the steps: carrying out the partitioning setting of the heat dissipation of a working part according to the optimal working temperature of the working part in an etching machine; the multiple sets of liquid conveying branch pumps and the cold flow control valves are matched to conduct independent liquid supply and conveying on all the heat dissipation subareas, subarea heat dissipation control over working components can be achieved through refrigerant liquid flow control, the heat dissipation and cooling control accuracy of the equipment can be effectively improved, heat circulation pipes are arranged at part of components in the heat dissipation subareas, and therefore the heat dissipation efficiency of the equipment is improved. Auxiliary heat compensation can be improved for working components with the high low-temperature upper limit in the subareas through an external heat source, all the components in the subareas are made to be at the optimal working temperature all the time, a real-time dynamic cooling temperature control mode is adopted, dynamic and accurate cooling of the working components can be achieved, and the working efficiency is improved. And it is ensured that working parts in the equipment can be kept in the optimal working state in different working stages.

The invention discloses a carbon capture system based on heat pump heating flash evaporation barren liquor and an operation method of the carbon capture system, and belongs to the field of absorption carbon capture and waste heat utilization. The system comprises an absorption carbon capture unit, a heat pump unit, a flue gas flow channel and a hot water supply circulation flow channel, the absorption carbon capture unit is used for capturing CO2 gas in flue gas, and the heat pump unit is used for recovering flue gas waste heat of the power plant and outputting medium-temperature waste heat to the flash tank to increase the flash steam amount; the flue gas runner is used for introducing high-temperature flue gas into a flue gas inlet in the bottom of the absorption tower after the high-temperature flue gas is sequentially used for heating the generator and the evaporator; and the heat supply circulating water flow channel is used for transferring heat output by the heat pump unit to the flash tank. The heat pump is used for converting the low-temperature waste heat of the flue gas into the latent heat of the steam, the demand quantity of the reboiler for the steam is reduced, the overall energy consumption of a power plant is reduced, and an energy-saving and efficient flue gas trapping technology is provided.

The invention discloses a method suitable for improving the structure uniformity of an AZ-series magnesium alloy manufactured through an electric arc additive. The method comprises the steps that firstly, a hot-rolled AZ31 plate is selected as a base plate; 2, performing three-dimensional modeling and slicing treatment according to a target magnesium alloy workpiece, and designing a deposition path; 3, preheating the substrate, adjusting the distance between the electrode and the substrate, and introducing protective gas; and fourthly, according to the deposition path, electric arc additive manufacturing is conducted in an inner layer rotating deposition mode, and the AZ series magnesium alloy workpiece is obtained. Plasma arc welding is used as a heat source, the preparation speed is high, heat input control is accurate, the arc stiffness is good, splashing is effectively reduced, and the workpiece formability is good; a rotary deposition mode is adopted, thermal circulation is effectively controlled, abnormal structure growth is avoided, meanwhile, the means of interlayer hammering deformation is assisted, a deposition interface is optimized, the obtained AZ series magnesium alloy workpiece is uniform in structure, fine in grain, few in defect and excellent in strength and plasticity, and the process is simple and easy to popularize.

The invention relates to the technical field of steelmaking, and discloses a method for heat recycling of medium-carbon aluminum killed steel casting residual steel slag. According to the thermal recycling method for the medium-carbon aluminum killed steel casting residual steel slag, the continuous casting residual steel slag is recycled on line and recycled for three times. The method is reasonable in design and simple and convenient to operate, and in the production process of the medium-carbon aluminum killed steel, more than 300 kg of molten steel and refining furnace smelting final slag still having the desulfurization capacity are always left at the bottom of a steel ladle after continuous casting pouring is finished; according to a traditional method, the processing cost is high in the treatment process, alloy elements are completely lost in the process of re-smelting in a furnace, and about 10% of iron elements contained in iron-containing material residual tailings are also wasted; compared with other methods, the method has the advantages that the implementation process is not tedious, the casting residual steel slag can be fully recycled under the condition that on-site logistics links are not obviously increased, consumption of alloy and refining slag is reduced, and good economic and social benefits are achieved.

The invention discloses an efficient thermal cycle drying device for producing flaky ammonium bifluoride, and relates to the technical field of ammonium bifluoride production. Comprising a machine body, an exhaust pipe and an air inlet sleeve, a first shell and a second shell are sequentially mounted at the upper end of the machine body from left to right, an air inlet cavity is formed in the bottom of the inner side of the machine body, and a mounting cylinder is connected to the upper end of the air inlet cavity through a spring; through cooperation of a mounting cylinder, a movable cylinder, a scraping plate and a first adjusting assembly, when materials are subjected to traditional one-way vibration blowing heat exchange, the materials are thrown and turned in the other direction to increase the drying uniformity, meanwhile, the air flow pressure of an exhaust hole is correspondingly adjusted, and the heat exchange drying effect is improved; and through cooperation of the movable barrel and the second adjusting assembly, when materials with the large water content and the large feeding amount are dried, the moving speed of the materials is increased, meanwhile, the air flow pressure of the exhaust holes is correspondingly adjusted, and the heat exchange drying effect is improved.

The invention relates to the technical field of heat exchange systems, and discloses a control method and device for a heat exchange system and the heat exchange system. The heat exchange system comprises a heat exchange loop and a refrigerant adjusting branch, the heat exchange loop comprises a compressor, an outdoor heat exchanger, a throttling device and an indoor heat exchanger which are sequentially connected, and the refrigerant adjusting branch is connected with the heat exchange loop between the throttling device and the heat exchanger in parallel. The length of the heat exchange loop between the first end of the refrigerant adjusting branch and the throttling device is smaller than that of the heat exchange loop between the second end of the refrigerant adjusting branch and the throttling device; the control method comprises the steps that operation parameters of the heat exchange system are obtained; and the refrigerant storage amount of the refrigerant adjusting branch is adjusted according to the operation parameters of the heat exchange system. According to the embodiment of the invention, the operation parameters of the heat exchange system can be obtained, and the refrigerant storage amount of the refrigerant adjusting branch is adjusted according to the operation parameters of heat exchange, so that the rationality of the refrigerant amount, participating in heat exchange circulation, of the heat exchange system under different working conditions is improved, and the performance of the heat exchange system is improved.

The invention relates to a system and a method for rapidly switching energy storage and release modes of a large compressed air energy storage power station. The system comprises a compressor unit, a compression side heat exchange system, a cooler, an expansion unit, an expansion side heat exchange system, a salt cavern, a low-temperature heat storage device, a high-temperature heat storage device, a switching valve, a high-temperature heat storage circulating pump, a low-temperature heat storage circulating pump, a stop valve, a motor and a generator. The compressor unit is connected to the salt cavern, the low-temperature heat storage device and the high-temperature heat storage device through the compression side heat exchange system and the cooler; the expansion unit is connected to the salt cavern, the low-temperature heat storage device and the high-temperature heat storage device through the expansion side heat exchange system; a switching valve is arranged between the compressor unit and the expansion unit. According to the invention, rapid switching between the energy storage mode and the energy release mode of the compressed air energy storage power station is realized, so that the increasingly frequent peak regulation requirement of a power grid is met.