48results about How to "Reduce exergy loss" patented technology

The invention relates to a separation and recovery device and a method for argon and methane in synthetic ammonia relief gas, the separation and recovery device comprises a cold box, a raw material relief gas pipeline, a purification system which is communicated with the raw material relief gas pipeline and provided with a first molecular sieve adsorber MS1 and a second molecular sieve adsorber MS2, a refrigeration system for providing cold energy required for separating and liquefying, and a distillation system for separating raw material relief gas stage by stage, wherein the refrigeration system comprises a low-pressure circulation nitrogen compressor TC1, a medium-pressure circulation nitrogen compressor TC2, a low-temperature pressurized turbo-expander ET2, a high-temperature pressurized turbo-expander ET1, a main heat exchanger E1 and a liquefier E2, the distillation system comprises a flash evaporation tank S2, a dehydrogenation tower C1 equipped with a first condenser K4 and afirst evaporator K1, a dehydrogenation tower C2 equipped with a second condenser K5 and a second evaporator K2 and a product tower 3 equipped with a third condenser K6 and a third evaporator K3. The invention can obtain high product purify and high recovery rate.

The invention discloses a multistage air deep dehumidification device for ultra-low dew point environments. The multistage air deep dehumidification device comprises a first fan, a primary efficiencyfilter, a medium efficiency filter and a first surface air cooler which are sequentially arranged in the outdoor fresh air direction and further comprises a solution dehumidification system, a first fresh air branch circuit, a second fresh air branch circuit, a third fresh air branch circuit, a first air returning branch circuit and a second air returning branch circuit which are arranged behind the first surface air cooler. A cold and heat source of a solution dehumidification cycle is provided by an independent vapor-compression-type refrigeration cycle, a regenerative heat source of two-stage rotary-wheel dehumidification uses condensation heat of another vapor-compression-type refrigeration cycle, and meanwhile shortage of the condensation heat is compensated in an electric heating mode. The evaporative cooling capacity of the vapor-compression-type refrigeration cycles is provided for an air-evaporator to cool air. After treating through the device, the humidity content of the fedair can be lowered to 0.01 g/kg.

The invention discloses a multi-level single-component refrigeration natural gas liquefaction system and a multi-level single-component refrigeration natural gas liquefaction method. Purified natural gas is cooled gradually in six heat exchangers (evaporators) and a plate fin type heat exchanger (natural gas subcooler) until being liquefied. Cold energy required by the liquefying process is provided by a propane system, an ethylene system and a methane system. The system is rich in adjusting means, the cold energy matched with the natural gas liquefying process can be provided for the naturalgas liquefying process, and thereby operational flexibility and adaptability to raw materials of the method are embodied. The system and the method have the advantages that the natural gas liquefyingprocess is low in energy consumption; refrigerant compressors are all single-component compressors, so that design is easier, purchase is more convenient, the compressors are more stable in operation, domestic equipment can be used, and construction investment of liquefaction factories can be effectively reduced; and the liquefying process is wide in heat exchanger selection range, and a cold boxstructure and a tube-shell structure can be used simultaneously or alternatively.

The invention discloses a stepped heating and supplying system sufficiently utilizing waste heat of a power plant and solves the problems that waste heat of the power plant is utilized at low rate and heat supply temperature is inflexible in adjustment in the prior art. The stepped heating and supplying system is a system combining a high-backpressure condenser of an air cooling unit with dead steam recovery heat supply manners of a heat pump turbine, and dead steam recovery heat supply by a heat pump, the high-backpressure condenser and pure steam extraction in the prior art are changed. The stepped heating and supplying system has the advantages that a water heating system of a heat supply net is provided with three-stage heating, temperature gradient difference of water of the hot net during heating is reduced, and energy loss is reduced. The system can be constructed by stages, initial investment is lower, and heat supply adjustment is flexible. The stepped heating and supplying system is applicable to direct air cooling units of power plants and particularly suitable for direct air cooling units costing 300,000 or lower than 300,000.

The invention discloses an integrated energy supply system for an agricultural greenhouse and a power supply method. The temperature of the greenhouse is automatically adjusted, heat required for maintaining the temperature of the greenhouse is provided, or the temperature of the greenhouse is reduced. According to the integrated energy supply system and the power supply method, a solar heat collection and wind power stirring heating combination effect is used for providing heat to a biogas generator, and the temperature of high-efficiency fermentation of a biogas raw material is maintained; and chemical energy released by biogas combustion is used for driving an absorption type heat pump to realize heating and cooling of the greenhouse, the utilization rate of renewable clean energy and the greenhouse heating efficiency are improved, a comprehensive energy supply operation strategy is proposed, the aim of adjusting the temperature of the greenhouse in different seasons and different weather conditions is achieved, and the needs for agricultural greenhouse energy supply are met.

The invention discloses a sludge drying device and method belonging to the technical field of sludge treatment. The device comprises a shell, a middle sleeve, a central shaft and a driving mechanism, wherein the central shaft is sleeved in the middle sleeve; a first chamber is formed by the outer wall of the central shaft and the inner wall of the middle sleeve; both ends of the first chamber are respectively provided with a first inlet and a first outlet; the middle sleeve is sleeved in the shell; a second chamber is formed by the outer wall of the middle sleeve and the inner wall of the shell; both ends of the shell are respectively provided with a second inlet and a second outlet; the outer wall of the central shaft is provided with a helical first partition board along the axial direction of the central shaft; the outer wall of the middle sleeve is provided with a helical second partition board along the axial direction of the middle sleeve; and the driving mechanism drives the middle sleeve to rotate along the axial direction thereof. According to the device and method disclosed by the invention, the heat exchange energy efficiency is increased, and the sludge treatment operating cost is reduced. The invention is low in initial cost and operating cost, can be widely applicable to industrial and municipal sludge treatment and has wide application prospects.

The invention relates to a low-concentration DMF wastewater treatment system by a distillation method with multiple intermediate heat exchangers. The system comprises a raw material preheater, a normal-pressure rectification tower, a plurality of intermediate reboilers, an overhead condenser and a tower kettle reboiler, wherein DMF wastewater is preheated to a bubble point in the preheater and is separated in the rectification tower. According to the system, consumption of high-grade steam can be reduced by adopting the plurality of intermediate reboilers, and the material extracted from the side line of an intermediate plate is heated by steam having a relatively low energy grade, so that the consumption of steam at the tower bottom can be saved, and the thermodynamic efficiency of a separation system can be improved. Compared with a traditional rectification method, the system has the advantage that the thermodynamic efficiency can be increased by over 39 percent.

The invention relates to a supercritical one-time diverting type longitudinal three-stage Rankine cycle power generation system. The system comprises an LNG (liquefied natural gas) circulating pump and a sea water pump and also comprises a primary power generation unit, a secondary power generation unit and a tertiary power generation unit which are sequentially distributed in longitudinal arrays,wherein the primary power generation unit comprises a primary evaporator, a primary steam turbine, a primary condenser and a primary working medium pump which are connected sequentially to form a closed loop; the secondary power generation unit comprises a secondary evaporator, a secondary steam turbine, a secondary diverter, a secondary condenser, a secondary mixer and a secondary working mediumpump which are connected sequentially to form a closed loop; the tertiary power generation unit comprises a tertiary evaporator, a tertiary steam turbine, a tertiary diverter, a tertiary condenser, atertiary mixer and a tertiary working medium pump which are connected sequentially to form a closed loop. The supercritical one-time diverting type longitudinal three-stage Rankine cycle power generation system has the advantages as follows: the system is simple in structure, convenient to use and capable of being widely used in LNG cold energy power generation field.

The invention provides a Rankine cycle system with a phase change energy storage heat exchanger. The Rankine cycle system comprises an overheating heat exchanger, heat-into-power conversion equipment, a condensation heat exchanger and a pump which are sequentially connected in series. The heat-into-power conversion equipment is connected with an electric generator. The Rankine cycle system further comprises the phase change energy storage heat exchanger and a preheating heat exchanger. One end of the phase change energy storage heat exchanger is connected with one end of the preheating heat exchanger, and the other end of the phase change energy storage heat exchanger is connected with the overheating heat exchanger. The other end of the preheating heat exchanger is connected with the pump. According to the Rankine cycle system provided by the invention, the phase change energy storage heat exchanger is combined with an existing Rankine cycle technology, the small heat transfer temperature difference between a working medium at the evaporation stage and a heat-transfer medium in cycle is guaranteed, the heat transfer temperature difference is kept unchanged, and the exergy loss of the system is reduced.

The invention discloses a blast furnace slag waste heat recycling and flue gas CO2 adsorption/desorption coupling system, and a method. The blast furnace slag waste heat recycling and flue gas CO2 adsorption/desorption coupling method comprises following steps: blast furnace slag is subjected to crushing and pelletizing so as to obtain blast furnace slag particles; heat exchange between the blast furnace slag particles and fluidizing air is carried out so as to obtain a first high temperature gas; after heat exchange, the blast furnace slag particles are delivered into a next grade furnace slag cooling device, secondary cooling of the blast furnace slag particles is carried out with fluidizing air so as to obtain a second high temperature gas; a high temperature adsorbent is delivered into a high temperature adsorption plant, flue gas to be treated is delivered into the high temperature adsorption plant, and the second high temperature gas is used for supplying the high temperature adsorption plant with heat energy, the high temperature adsorbent is used for adsorbing CO2 in the flue gas to be treated, and obtained purified flue gas is discharged. The blast furnace slag waste heat recycling and flue gas CO2 adsorption/desorption coupling method is capable of realizing graded high efficiency utilization of recycled blast furnace slag waste heat, and reducing available energy loss in waste heat recycling process; and a novel method is provided for energy conservation and emission reduction in the field of steel-smelting.

The invention discloses a non-azeotropic working medium dual-stage organic flash evaporation circulation system and a heat energy recovery method thereof, and belongs to the field of energy recovery.A working medium exchanges heat with a waste heat medium in a heat exchanger after being pressurized by a working medium pump, and enters a high-pressure-stage gas-liquid separator after being throttled by a first throttle valve; a saturated steam after high-pressure-stage flash evaporation enters a high-pressure-stage turbine to do work through expansion, and saturated liquid is throttled again through a second throttle valve to change into a gas-liquid mixture; the gas-liquid mixture and exhaust gas are mixed in a high-pressure-stage mixer, and then enter a low-pressure-stage gas-liquid separator together; saturated steam after the low-pressure-stage flash evaporation enters a low-pressure-stage turbine to do work through expansion, saturated liquid is throttled through a third throttledvalve to change to a gas-liquid mixture, and the gas-liquid mixture and the exhaust gas are mixed in a low-pressure-stage mixer; and the gas-liquid mixture and the exhaust gas are jointly cooled in acondenser. The temperature matching between the circulation and a cold source is improved, the exergy loss caused by single-stage OFC direct throttling is reduced, the system efficiency is improved,and the stepwise efficient use of medium and low temperature thermal energy is realized.

The invention discloses a terrestrial heat generating system, and belongs to the technical field of generating systems. The terrestrial heat generating system comprises a generator, a heat exchanger, an absorbing device and a steam turbine; a water inlet of a heat exchange pipe of the heat exchanger communicates with a shell pass of the absorbing device through a solution pump, and a water outlet of the heat exchange pipe of the heat exchanger communicates with the shell pass of the generator; a steam outlet which communicates with an inlet of the steam turbine is arranged in the top part of the generator; an outlet of the steam turbine communicates with a housing of the absorbing device; a shell pass water inlet of the heat exchanger is connected with a shell pass water outlet of the generator; the shell pass water outlet of the heat exchanger is connected with the shell pass water inlet of the absorbing device through a throttle valve; a hot water circulating pipe is arranged in the generator; a cold water circulating pipe is arranged in the absorbing device; ammonia and water mixture is used as the circulating medium. The terrestrial heat generating system has the advantages that the ammonia and water mixture is used as the circulating medium, thus the useful energy loss caused by evaporating and condensing can be reduced, and the circulating generating efficiency can be raised.

The invention discloses a heat-integrated process design for four carbon dioxide supplementing positions in methanol synthesis. First-stage steam methane reforming (SMR) and carbon dioxide methane reforming (DMR) are combined, carbon dioxide is supplemented in front of and behind an SMR reforming furnace, in front of the DMR reforming furnace and at circulating gas, and the whole process is subjected to heat integration. The process sequentially comprises the following steps: first-stage steam methane reforming, carbon dioxide methane reforming, compression, methanol synthesis and rectification to finally obtain refined methanol with the purity of 1 (mass fraction). The process design effectively solves the problems of high energy consumption, large CO2 emission and the like in the traditional methanol process.

The invention provides a hybrid electricity generation system. The hybrid electricity generation system comprises a steam turbine, an electricity generator, a condenser, a waste heat boiler and a biomass boiler, wherein the electricity generator is connected to the steam turbine and is used for converting the mechanical work into the electric energy, the condenser is connected to the steam turbine and is used for condensing waste steam exhausted by the steam turbine for forming condensation water, and the waste heat boiler and the biomass boiler are connected to the condenser; the waste heat boiler heats and evaporates the condensation water flowing into the waste heat boiler for obtaining a first branch of saturated steam; the biomass boiler heats and evaporates the condensation water flowing into the biomass boiler for obtaining a second branch of saturated steam; the waste heat boiler conveys the first branch of saturated steam to the biomass boiler, and the biomass boiler carries out superheating treatment on the first branch of saturated steam and the second branch of saturated steam through high-temperature biomass smoke for obtaining superheated steam and conveying the superheated steam to the steam turbine. According to the invention, the power capability of industrial waste heat is improved, the exergy loss of the biomass energy is reduced, and the electricity generation efficiency of the whole electricity generation system is improved.

An internal energy integrated rectification device comprises a rectification tower with an inner layer tower body and an outer layer tower body, the outer layer tower body is a stripping section, the inner layer tower body is a rectification section, a feed inlet I formed in the upper portion of the outer layer tower body is externally connected with a feed preheater, a liquid outlet I is formed in the bottom of the outer layer tower body, and the liquid outlet I is connected with a tower bottom discharge pipe and connected with a feed inlet V after passing through a reboiler; a gas outlet I is formed in the top of the outer layer tower body, is externally connected with a compressor inlet superheater and a compressor in sequence, and is connected with a feeding hole II in the bottom of the inner layer tower body; a gas outlet II is formed in the top of the inner layer tower body, is externally connected with a compressor inlet superheater and a feeding preheater in sequence and then is connected with a tower top discharging pipe and a feeding hole III in the top of the inner layer tower body; a liquid outlet II is formed in the bottom of the inner layer tower body and is connected with a feeding hole I after passing through a reboiler and a throttling valve in sequence; a silk screen condensation plate is arranged below the top gas outlet I in the outer layer tower body; and liquid distribution devices and packing layers which are distributed at intervals are arranged in the outer layer tower body and the inner layer tower body. When the device is used for rectification, the effective energy loss in the rectification process is reduced, and the separation energy consumption is reduced.