31results about How to "Reduce heat transfer load" patented technology

The invention provides a combined cooling power generation composite system based on a supercritical organic Rankine cycle and belongs to the field of industrial energy conservation. An expansion machine, a power generator and a steam compressing cold cycling compressor of the Rankine cycle are connected coaxially, same organic working medium is used to be simultaneously cooled in a condenser, and a steam compressing refrigerating cycle is coupled effectively on the basis of basic organic Rankine cycle. In addition, supercritical pressure is used to allow heat rising of organic working medium in a heat absorber to be well matched with temperature changing curve of a heat source, system irreversible loss is further lowered, and waste heat recycling rate is improved. Industrial smoke water heat or other water heat sources are used as driving force, combined cooling power generation is performed by taking refrigerating as priority, refrigerating is not performed by using smoke waste heat for power generation and using power for refrigerating, and accordingly loss caused by energy conversion is reduced. Cooling amount and power output amount can be flexibly adjusted according to cooling amount requirements.

The invention discloses a method of reducing the interstage temperature of a propane compressor in a propane compressor cycle refrigerating system, and the method comprises the flowing steps: communicating a propane accumulating tank in the propane compressor cycle refrigerating system with each anti-surge pipeline or return pipeline, and arranging throttle valves the communicated pipelines; and arranging adjusting valves on the pipelines through which the propane accumulating tank is communicated with the anti-surge pipelines or the return pipelines. The method of reducing the interstage temperature of the propane compressor in the propane compressor cycle refrigerating system can be used for effectively improving the working efficiency of the compressor, reducing the heat exchange load of a heat exchanger at the outlet of the compressor, and eliminating the influence of change of interstage temperature of the compressor on the frige heat exchanger in low-load running working conditions.

The invention discloses a recycling and helium-extracting co-production system and method for light hydrocarbons of helium-poor natural gas. The co-production system mainly comprises a heat exchanger,a low-temperature separator, a heavy contact tower, an ethane-removal device, a butane removal device, four flash tanks, three mixers, a plurality of compressors and a plurality of expanders. The co-production process utilizes an agent capable of automatically generating cold to refrigerate and expand a cold box to integrate heat exchange, and liquefied petroleum gas and stable light hydrocarbonsare obtained from raw material gas in the light hydrocarbon recycling device; dry gas of the light hydrocarbon recycling device enters a flash-evaporating helium-extracting device to gradually liquefy and separate to obtain LNG, externally conveyed gas and rough helium; and a low-temperature liquid-state natural gas product separated from the flash-evaporating helium-extracting device is taken asan agent capable of automatically generating cold through cascade cycle. Helium extracting and light hydrocarbon recycling are integrated, the heat exchanger is designed with high integrity, and theagent capable of automatically generating cold is adopted for cycle refrigeration; and compared with an existing process, the method overcomes the bottleneck of singe line production capacity, reducesliquefying cost and comprehensive energy consumption, improves performance, and has a practical application value.

The invention relates to a low-temperature gas liquefaction and separation system applying the effect of segregation, which comprises a compressor module, a cooling and segregation module and a liquefaction and separation module, wherein a high-pressure outlet of the compressor module is connected with a refrigerant high-pressure inlet of the cooling and segregation module; a refrigerant high-pressure outlet of the cooling and segregation module is connected with a refrigerant high-pressure inlet of the liquefaction and separation module; a refrigerant low-pressure outlet of the liquefaction and separation module is connected with a refrigerant low-pressure inlet of the liquefaction and separation module, and a refrigerant low-pressure outlet of the cooling and segregation module is connected with a lower-pressure inlet of the compressor module; after pretreatment, mixed gas required to be separated enters the cooling and segregation module from a separated gas inlet and then enters the liquefaction and separation module; liquid separated out by each stage and tail gas output by an end stage enters respective preceding stages as required, and cold energy is recovered stage by stage or directly output. The system is driven by a single compressor so as to have reliable and simple operation, applies the segregation to realize separation in a heat exchanger and has simple structure and flexible arrangement.

A multi-element mixed working medium back-heating type throttling and refrigerating circulation system with dephlegmator-separator is composed of a compressor module, a back-heating heat exchanger module, a throttling module, an evaporative heat exchanging module and connecting pipes thereof. A high-pressure outlet of the refrigerating compressor module is connected with a refrigerant high-pressure inlet of the back-heating heat exchanger module, a refrigerant high-pressure outlet of the back-heating heat exchanger module is connected with a refrigerant high-pressure inlet of the throttling module, a refrigerant low-pressure inlet of the throttling module is connected with the evaporative heat exchanging module, an outlet of the evaporative heat exchanging module is connected with a refrigerant low-pressure inlet of the back-heating heat exchanger module, a refrigerant low-pressure outlet of the back-heating heat exchanger module is connected with a low-pressure inlet of the refrigerating compressor module. The back-heating heat exchanger module is composed of dephlegmator-separator sub modules from first stage to fifth stage, and the dephlegmator-separator sub module of any stage is of eight different structures. The system can realize refrigeration of fixed temperature zone at a low temperature effectively, and can also be applicable to fields with complicated load, such as multi-element gas liquefied separation.

The invention discloses a cascade refrigerating circulating system coupled with an injector. Overheat steam exhausted by a high-temperature-level compressor and a low-temperature-level compressor in the system will heat and gasify a high-temperature-level overcooled liquid refrigerant which is boosted through a booster pump to be under generation pressure, and generated saturated steam is used as working steam of refrigerant flash evaporation gas which is separated through a gas-liquid separator after injecting of an injector and high-temperature-level throttling are conducted. Due to the fact that sensible heat of overheat gas exhausted by the low-temperature-level compressor is utilized in a three-channel generator, loads of a condensation evaporator are effectively reduced, in other words, the refrigerating amount of high-temperature-level refrigerating circulation is reduced, on the premise of the high-temperature-level and low-temperature-level working conditions and the same low-temperature-level refrigerating amount, refrigerating loads of high-temperature-level circulation and power consumption of the compressors will be reduced, and the COP of the whole cascade refrigerating circulation will be improved. It can be obtained that the refrigerating coefficient of the cascade refrigerating circulating system will be increased by 10% or so compared with the refrigerating coefficient of a traditional cascade refrigerating system through preliminary estimation on the cascade refrigerating system composed of NH3 and CO2.

The present invention provides a desktop type self-supply water heat exchanger performance test experiment device based on semiconductor heat pump, which utilizes semiconductor heat pump technology, has small volume, flexible control, and adapts to the requirements of desktop systems; realizes energy saving, especially when hot and cold water are supplied at the same time. Compensation, recovery of energy from cold and heat sources; circulating water supply, no need for upper and lower water, convenient and flexible experiments, not limited by the position of upper and lower water pipes; heat exchanger type expansion tank is adopted, bulky cold and hot water tanks are discarded, and the structure is compact, realizing hot and cold water The mixed cold and heat compensation heat exchange reduces the heat exchange load of the environment, and at the same time realizes water replenishment, constant pressure, and removal of system gas or excess water; the flow rate is independently adjusted and is not affected by other factors, and each test condition is easy to achieve; considering downstream and countercurrent test conditions and its influence on energy recovery thermodynamic efficiency to maximize energy recovery; the invention is flexible and convenient, compact in structure, water-saving, environmentally friendly, and energy-saving, and can realize the thermal performance and thermal performance of liquid-liquid heat exchangers The resistance characteristic test is widely applicable to the experimental teaching and testing needs of heat exchangers.

The invention provides a multi-mode circulating water supply device. The device comprises an expansion heat exchanger, a first water pump, a second water pump, a first adjusting valve, a second adjusting valve, a first temperature sensor, a second temperature sensor, a first flow sensor, a second flow sensor, a first proportional distribution valve, a second proportional distribution valve and a heat pump; and the device uses a heat pump technology for realizing the energy compensation, saves water to achieve recycling to prevent wastes of water resources, adopts the expansion heat exchanger to reduce environmental heat exchange loads, and synchronously realizes water supply, pressure fixation and exhausting of system gas or excessive water. The device is flexible, convenient, compact in structure, water-saved, environment-friendly and energy-saved, can realize constant-temperature and constant-flow water supply in different temperature areas under different heat loads, and is widely suitable for the water supply demands of different laboratories with different temperature areas and loads and other water use places.

The invention provides a continuous synthesis system and method of dicyandiamide. According to the material flowing sequence, the continuous synthesis system comprises a raw material pretreatment unit and a synthesis unit which are sequentially communicated through a conveying pipeline, and the raw material pretreatment unit comprises a raw material pretreatment device. Based on the system, the continuous production of dicyandiamide by taking lime nitrogen as a raw material is effectively realized, the filtering frequency is reduced, and the product loss is reduced. Meanwhile, based on the arrangement of the system, the reaction conditions can be more accurately and efficiently controlled, so that the reaction yield and the production efficiency of dicyandiamide are further improved.

The invention provides an expansion type heat exchanger based on mixed heat exchange. The expansion type heat exchanger comprises an expansion section, a water supply section, a partition, a water supplement port, an inlet, an outlet, a direct mixing heat exchanger, a water distribution mechanism, a filler, an annular weir plate, an automatic exhaust valve and a liquid level sensor. The heat exchanger and an expansion water tank are organically combined, the structure is reasonable and compact, the utilization rate of equipment is increased, the manufacturing cost is lowered, and the occupiedspace is reduced. By the adoption of the expansion type heat exchanger, the mixed cold and hot compensation heat exchange of cold and hot water is realized, the environmental heat exchange load is reduced, and meanwhile water supplement, constant pressure and elimination of system gas or over-filled water are realized. The expansion type heat exchanger is flexible and convenient to use, compact instructure and environmentally-friendly, saves water, saves energy and is widely applicable to cold and hot water supply occasions with different temperature regions and different heat loads.