48results about How to "Reduce heating load" patented technology

The invention discloses a device for combining power cycle with compression type refrigerating cycle, which can be used for simultaneously completing power cycle and compression type refrigerating cycle. The device comprises a compressor, a heat regenerator, a condenser, a reservoir, a throttle valve, an evaporator I, a working medium pump, an evaporator II, an expander and a transmission device, which are connected according to a rule. According to the device disclosed by the invention, medium-low-grade energy sources such as solar energy, geothermal energy and industrial waste heat can be utilized for driving the expander to apply work, so that the compressor is driven by the output shaft work to operate for achieving the power cycle and the refrigerating cycle. Meanwhile, the device can also be used for generating power when the operation of a refrigerating working condition is not needed. The heat regenerator is additionally arranged in the device, so that the load of the heater is reduced while the load of the condenser is reduced. The reservoir is arranged, so that the two cycles are operated independently, thereby ensuring stable refrigerating to a user. The device disclosed by the invention has a good application prospect in underserved areas of power or small areas or cold supply, and is of significance to energy conservation and emission reduction.

The invention provides a heating method for IF steel in ferrite rolling and is applied to the technical field of hot rolling. A slab is heated in a preheating section at the furnace temperature ranging from 500 DEG C to 800 DEG C till the temperature of the slab at an outlet of the preheating section ranges from 300 DEG C to 600 DEG C; the slab is heated in a first heating section at the furnace temperature ranging from 800 DEG C to 1100 DEG C till the temperature of the slab at an outlet of the first heating section ranges from 600 DEG C to 900 DEG C; the slab is heated in a second heating section at the furnace temperature ranging from 1000 DEG C to 1180 DEG C and in the atmosphere that the coefficient of excess air in the second heating section is smaller than 1 till the temperature of the slab at an outlet of the second heating section ranges from 900 DEG C to 1120 DEG C; and the slab is heated in a soaking section at the furnace temperature ranging from 1150 DEG C to 1250 DEG C and in the atmosphere that the coefficient of excess air in the soaking section is smaller than 1 till the temperature of the slab at an outlet of the soaking section ranges from 1060 DEG C to 1160 DEG C. The heating method solves the technical problem that when an existing hot rolling technology is applied to IF steel rolling, the quality of rolled finished products is low, and the overall quality of the rolled finished products is improved.

The invention discloses a kerosene-hydrogenation production process. The process comprises a reaction part and a fractionation part, wherein a reaction product of the reaction part directly enters a high-pressure hot separator without being cooled after exchanging heat with raw materials, a flash steam phase is cooled to about 50 DEG C through an air cooler after exchanging heat with recycle hydrogen or new hydrogen and then enters a high-pressure cold separator, and high-temperature reaction products separated from the bottoms of the high-pressure hot separator and the high-pressure cold separator exchange heat with refined kerosene from the bottom of a fractionating tower and are sent to the fractionation part. Compared with the prior art, the kerosene-hydrogenation production process is improved, the energy recycle efficiency of a device can be effectively improved and the energy consumption of the device is reduced with the process. The invention further provides a kerosene-hydrogenation production system adopting the kerosene-hydrogenation production process.

The invention relates to a method and device for recycling and refining acetonitrile in ceftriaxone sodium synthesis. The method includes the following steps: acetonitrile waste liquid in ceftriaxone sodium synthesis is fed into a first rectifying tower, and parts of water and heavy components are removed in a rectifying mode; rectified acetonitrile liquid is obtained after concentrating is carried out and fed into a neutralization tank for pH value adjustment; the neutralized rectified acetonitrile liquid is fed into a second rectifying tower for further impurity removing, the rectified acetonitrile liquid enters a pervaporation membrane separation unit after impurities are removed in the second rectifying tower, residual liquid in a kettle is returned to the first rectifying tower, and the acetonitrile in the residual liquid is recycled; the crude acetonitrile is obtained after the liquid is separated through the pervaporation membrane separation unit, water and a small amount of acetonitrile in a solution on the feed liquid side permeate a pervaporation membrane in a steam mode to obtain permeating liquid, the permeating liquid is condensed to be returned to the neutralization tank, and the acetonitrile in the permeating liquid is recycled; the crude acetonitrile obtained through the pervaporation membrane separation unit is fed into a third rectifying tower to be refined, the finished acetonitrile is obtained, acetonitrile-water azeotrope obtained after rectifying of the third rectifying tower is returned to the second rectifying tower, and the acetonitrile in the acetonitrile-water azeotrope is recycled.

The invention discloses a control method and device for a gas water heater. The control method comprises the steps that the current heating rate of the gas water heater is obtained; according to the relation between the current heating rate and the heating rate interval, the thermal load correction mode of the gas water heater is determined; and the thermal load of the gas water heater is adjusted in the thermal load correction mode. Through the arrangement, the thermal load correction mode of the gas water heater can be determined according to the relation between the current heating rate and the heating rate interval, and the heating power of the gas water heater is adjusted through the thermal load correction mode, so that the heating thermal load and the heating rate of the gas water heater can be adjusted and controlled. Therefore, the temperature rise overshoot can be reduced while the heating speed is increased.

This invention provides a gas heating and wetting system used in test platforms of small PEM fuel batteries, which applies a method of preheating gas-phase and liquid-phase to a preset temperature for increasing the control accuracy of a small wetting system so as to reduce load of heating of a wetter, in which, deionized water entering into an wetting system and the reactant gas can be pre-designed to a bit higher than saturated temperature by a control system in terms of the flow of the wetted reactant gas, thus, the gas reactant entering into the wetter imbibes by transmitting medium under the temperature closing to saturation so as to reduce axial temperature difference of the wetter.

The invention provides an organic gas recovery modular assembly and a coating machine waste gas treatment system. The organic gas recovery modular assembly is characterized in that an organic gas concentration sensor is arranged on the exhaust pipeline, connected with a drying oven, of the organic gas recovery modular assembly, so that the air supply amount and the air exhaust amount of the drying oven can be dynamically adjusted according to the detected concentration of organic gas in a production device, on the premise that the concentration of the organic gas in the drying oven is maintained within an allowable concentration range required by the design process, the power consumption of operation of a fan is reduced as much as possible, the heating load required by an oven heater is reduced, energy is saved, and the operation cost of the system is reduced.

The invention provides a xylene disproportionation reaction product separation system based on a thermal high-pressure separation process and a separation method of the xylene disproportionation reaction product separation system. The system comprises a disproportionation reaction system and a reaction product separation system, which are connected in sequence, wherein the reaction product separation system comprises a thermal high-pressure separation tank, a heat exchanger, an air cooler, a water cooler and a reaction product separation tank; a gas discharging hole of the thermal high-pressure separation tank is sequentially connected with the heat exchanger, the air cooler, the water cooler and a feeding hole of the reaction product separation tank; a liquid discharging hole of the reaction product separation tank is connected with the heat exchanger. According to the xylene disproportionation reaction product separation system, under the condition of basically not influencing the purity of circulating hydrogen and the yield of aromatic hydrocarbon, repeated cooling and heating processes of thermal high-pressure separation liquid are reduced; a heating load of a subsequent fractionation system is reduced; meanwhile, the flow of a gas phase of the thermal high-pressure separation tank is obviously reduced and a cooling load of the reaction product is extremely reduced; compared with the prior art, the cooling load is reduced by more than 30 percent, the heating load is reduced by more than 50 percent and an energy-saving effect is remarkable.

The invention discloses a crude oil reduced pressure distillation method for eliminating a choke point in a pressure reduction process. The method comprises the following steps: firstly, performing heat exchange on atmospheric pressure residual oil through an atmospheric pressure furnace convection section and a reduced pressure furnace convection section, raising the temperature by 5-20 DEG C, then feeding the residual oil into a reduced pressure flash column, operating the reduced pressure flash column at 5-30kPa, at the same time, introducing reduced pressure flash column light lube oil as washing oil from the upper part of a reduced pressure distillation column, performing heat exchange on a gas on the top of the reduced pressure flash column, condensing, cooling and directly extracting the gas as a product, extracting the washing oil in the middle of the reduced pressure flash column, feeding the washing oil below a light lube oil extracting plate of the reduced pressure flash column, feeding the flash base oil of the reduced pressure flash column into a reduced pressure furnace, heating to be 370-410 DEG C, feeding into the reduced pressure distillation column through an oil transfer line, performing reduced pressure fractionation, and then extracting products of different fractions from a side line of the reduced pressure distillation column. The method improves the crude oil reduced pressure distillation process, eliminates the choke points of the reduced pressure furnace and the reduced pressure distillation column, reduces energy consumption, improves the treatment capacity and increases the economic benefits of a device.

The invention discloses an upward air curtain multi-union type heat pump air conditioner driven through an air solar composite source. Firstly, solar energy is absorbed through a reflector, transparent blades and a finned black cavity, air energy is absorbed through fins, and a solar absorber and an air fin evaporator are integrally designed; secondly, an air and solar composite source multi-union type heat pump air conditioner is established to increase the evaporation temperature; thirdly, the condensation temperature is decreased through the vertical upward air curtain unified heating and efficient air conditioner tail end form; fourthly, the heating capacity and the energy efficiency ratio are increased by reducing the circulation temperature difference; and fifthly, the solar energy is utilized for driving the heat pump through an efficient and cheap photo-thermal converting form, and the application threshold of the solar multi-union type heat pump air conditioner is lowered.

The invention discloses a method for continuously producing L-calcium lactate, wherein the method comprises the steps: step A, adding an L-calcium lactate solution into a heating storage mechanism, and heating and concentrating the calcium lactate solution; step B, introducing the concentrated calcium lactate solution into a cooling mechanism, and cooling and crystallizing the calcium lactate solution; step C, conveying the cooled and crystallized L-calcium lactate crystals into a drying mechanism; step D, conveying the dried L-calcium lactate crystals into a crushing mechanism; and step E,carrying out uniform crushing by the crushing mechanism to obtain L-calcium lactate powder. According to the invention, the processing amount of the L-calcium lactate solution is large and the crystallization rate is high.

The invention relates to the technical field of energy, in particular to a photovoltaic and photo-thermal integrated heating system and an operation method thereof. The system comprises a photovoltaic power generation module, a photo-thermal module, an electric heating module and a control module. The photovoltaic power generation module comprises a photovoltaic power generation unit; the photo-thermal module is used for absorbing waste heat dissipated by the photovoltaic power generation unit in the power generation process; the photo-thermal module and the electric heating module can be used for heating a medium to be heated. The system has the following characteristics that photovoltaic and photo-thermal of solar energy are combined, so that the energy consumption and the heating cost are reduced; the condensation unit is added to further improve the light energy collection area and power, and is integrated with the heat exchange function of the photo-thermal module to avoid the reduction of the efficiency of the power generation module caused by the temperature, and is used for heating the to-be-heated medium to realize cogeneration; when a medium is electrically heated, electromagnetic heating is used, so that the problems of loss and slow heat transfer caused by contact type heating can be avoided, rapid heating can be realized, and the energy utilization efficiency is improved.