35results about How to "Stable operating pressure" patented technology

The invention provides a method for preparing aliphatic polycarbonate through a continuous solution polymerization method. The method comprises the following steps of a, injecting an epoxy monomer, carbon dioxide and catalyst into a circulation flow reactor through a continuous way, utilizing a circulation pump to provide power for the reaction materials, circularly returning partial reaction materials to the circulation flow reactor, driving one part of the reaction materials to leave the circulation flow reactor at a speed being identical to the feeding speed to enter a tubular reactor with a built-in static mixer; b, controlling the retention time of the pulp in the tubular reactor through the ratio of the pipe length and the flowing linear speed of the reaction materials, and gradually charging a solvent step by step through a plurality of feeding ports along the length of the tubular reactor; c, feeding an end sealing agent and a stabilizer through a feeding port on the tail end of the tubular reactor to carry out the in-situ chemical or physical modification; d, ensuring the reaction endpoint pulp which continuously flows out of a discharging end to enter a middle-pressure flash evaporator, carrying out the flash evaporation by utilizing the reaction pressure, removing the solvent, and returning the pulp to the tubular reactor after the pulp is condensed; and e, devolatilizing and drying the pulp to obtain a polymerization product.

The invention provides a method for controlling low temperature refrigeration of an air conditioner. The method comprises the following steps: (1) measuring middle temperature T3 of an outer unit condenser; (2) comparing T3 with first preset values T1 and T3 and a second preset value T2 respectively, wherein T1 is greater than T2; (3) when T3 is greater than T1, raising output voltage U of an external motor so as to increase the rotating speed of an external fan; when T3 is smaller than T2, decreasing the U so as to reduce the rotating speed of the external fan. According to the method for controlling the low temperature refrigeration of the air conditioner, the output voltage U of the external motor is adjusted according to the middle temperature T3 of the condenser so as to adjust the rotating speed of the external fan, and then the T3 is stabilized in a range of T2 to T1. The T3 can reflect the system operation pressure of the air conditioner better, thus the T3 stabilized in the certain range can ensure the working pressure of the condenser, thus the system operation pressure is controlled better; therefore, stable operation of the system is ensured during the low temperature refrigeration of the air conditioner, thus the start and stop times of a compressor are reduced, and the comfort of room is improved.

The present invention discloses passive accident discharge and cooling system and method of a steam generator in a nuclear power station. The system includes a main water feeding pipe, a main water feeding isolation valve, the steam generator, a main steam isolation valve, a discharge tank, a water cooling wall upper header, a water cooling wall lower header, a discharge liquid recovery unit, an air cooler, an elevated expansion tank, an exhaust valve and an air cooling tower. The system and method can quickly and reliably cool and recover a radioactive high-temperature steam water mixture without relying on an external power source when a heat transfer pipe breaks in the steam generator of the nuclear power station.

The invention discloses a marine diesel engine fuel oil filter with an ultrasonic cleaning device. The marine diesel engine fuel oil filter with the ultrasonic cleaning device comprises a filter shell, wherein the filter shell is provided with an oil inlet, an oil outlet and a sewage outlet used for discharging impurities. The ultrasonic cleaning device acting on the interior of a filter cavity is arranged on the filter shell. The ultrasonic cleaning device comprises an ultrasonic transducer fixed to the filter shell, and a high-frequency vibrating bar which extends into the filter cavity and is used for converting high-frequency electric energy into mechanical energy is connected to the ultrasonic transducer. A filtering method comprises the steps that firstly, a procedure is set; secondly, conventional cleaning is conducted, and conventional cleaning includes (1) high-pressure oil cleaning and (2) high-pressure air reverse-blowing cleaning; and thirdly, deep cleaning is conducted, namely ultrasonic cleaning is conducted. According to the filter, regular automatic cleaning control can be achieved, the automation degree is greatly increased, and the labor intensity of workers is effectively relieved; faults, caused by quality problems of diesel oil, of a diesel engine are reduced, and remarkable economical benefits are obtained on the aspects of saving oil, prolonging the service life of the diesel engine and the like.

The invention belongs to the field of new energy, and particularly relates to a six-tank circulating type marsh gas double-path SOFC anode fuel supply system. Crop straw is adopted as raw materials of the system, six fermentation tanks are designed to enter a marsh gas production period in sequence, two fermentation tanks are kept supplying marsh gas at the same time, and the output flow of the two fermentation tanks is kept to be output in a staggering peak mode. The SOFC anode fuel supply system is designed into a double-path supply system, namely, an A-path system and a B-path system. The A-path system and the B-path system alternately bear a work state and a maintenance and standby state. When a certain device in the anode fuel supply system in the work state breaks down, a corresponding device in the system in the maintenance and standby state is immediately switched to replace the device breaking down to work. The SOFC anode fuel supply system has the advantage of being large and stable in marsh gas supply flow, the needs of SOFC generated power for continuous supplying to the anode fuel supply system are met.

The invention provides an extraction device and an extraction method, the mixing and clarifying extraction tank includes a mixing chamber, an organic liquid film generator, a gas-liquid separation device and a liquid-liquid coalescence separation device; the mixing chamber is provided with a heavy phase input port and the first heavy phase outlet; the organic liquid film generator is connected to the mixing chamber, and a light phase input port and an air inlet are provided; the gas-liquid separation device is connected to the mixing chamber; the liquid-liquid coalescence separation device It is connected with the gas-liquid separation device, and is provided with a liquid inlet, a first light phase discharge port and a second heavy phase discharge port. The device does not need to be equipped with a clarification chamber, which better realizes the integrated structure of the mixing chamber and the clarification chamber, solves the problem of uniform distribution of the heavy phase liquid in the mixing chamber and the separation of light phase, heavy phase and gas phase in the mixing chamber, and occupies a small area. Low consumption, can handle a large flow of aqueous solution containing the target to be separated, and can reduce back-mixing in the high-level extraction tower.

The invention mainly relates to a reverse-osmosis and ultra-filtration scale inhibitor with the wide suitable salinity range. The inhibitor has the good scale inhibition effect within the wide ionic strength range, and is prepared from one or more of amino trimethylene phosphonic acid (ATMP), phosphono-carboxylic acid (POCA), polyaspartic acid (PASP) and polyamino polyether methylene phosphonate (PAPEMP); by means of the reverse-osmosis and ultra-filtration scale inhibitor, membrane face scaling can be effectively prevented, fouling of a membrane is prevented, and the service life of a membrane system is prolonged. The working pressure and the water production efficiency of the membrane system are kept, and it is prevented that due to fouling, energy consumption of the system is increased. According to the reverse-osmosis and ultra-filtration scale inhibitor with the wide suitable salinity range, the reverse-osmosis scale inhibitor can be suitable for the wide water-quality salinity range (electric conductance is 0 microsecond to 30,000 microseconds) through compounding, and the using effect of the reverse-osmosis inhibitor can be guaranteed within the range.

The invention provides a method for preparing aliphatic polycarbonate through a continuous solution polymerization method. The method comprises the following steps of a, injecting an epoxy monomer, carbon dioxide and catalyst into a circulation flow reactor through a continuous way, utilizing a circulation pump to provide power for the reaction materials, circularly returning partial reaction materials to the circulation flow reactor, driving one part of the reaction materials to leave the circulation flow reactor at a speed being identical to the feeding speed to enter a tubular reactor with a built-in static mixer; b, controlling the retention time of the pulp in the tubular reactor through the ratio of the pipe length and the flowing linear speed of the reaction materials, and gradually charging a solvent step by step through a plurality of feeding ports along the length of the tubular reactor; c, feeding an end sealing agent and a stabilizer through a feeding port on the tail end of the tubular reactor to carry out the in-situ chemical or physical modification; d, ensuring the reaction endpoint pulp which continuously flows out of a discharging end to enter a middle-pressure flash evaporator, carrying out the flash evaporation by utilizing the reaction pressure, removing the solvent, and returning the pulp to the tubular reactor after the pulp is condensed; and e, devolatilizing and drying the pulp to obtain a polymerization product.

The invention discloses a fine desulfurization device and method for coke oven gas, belonging to the technical field of gas desulfurization. The fine desulfurization device comprises an adsorption tower, a washing tower and a conversion tank, wherein a gas inlet of the adsorption tower communicates with a main gas inlet pipe, and a gas outlet of the adsorption tower communicates with a main purified gas outlet pipe; a gas inlet of the conversion tank communicates with the adsorption tower through a circulating desorbed gas inlet pipe, and a gas outlet of the conversion tank communicates with the adsorption tower through a circulating desorbed gas outlet pipe; a heating device and a desorption fan are arranged on the circulating desorbed gas inlet pipe, and the circulating desorbed gas outlet pipe communicates with the washing tower through a desorbed gas discharge inlet pipe. According to the invention, the continuous working time of the adsorption tower can be effectively prolonged, the efficiency of removing organic sulfur in coke oven gas, blast furnace gas and gasifier gas can be improved while the adsorbent is prevented from being easily blocked and the catalyst is prevented from being easily poisoned, and energy consumption in the whole process is reduced.

The invention discloses a natural-gas flow-temperature helium extracting system and a natural-gas flow-temperature helium extracting method. According to the system and the method, the post-expansion and nitrogen circulating refrigerating two-column separating technology is carried out for fully recovering the cooling capacity of the device in order to pre-cool the natural gas which serves as the raw material, and thereby the system can be applied to the natural gas which has an extremely low content of helium, and has the characteristics of being low in energy consumption, high in helium recovery rate, small in investment, flexible in operation, and high in adaptability to variable working conditions. The system and the method have the positive effects that little helium in the helium-containing natural gas can be extracted by a pre-cooling system and a low-temperature rectifying system, an independent nitrogen circulating refrigerating system is adopted and used for supplying an ultralow-temperature cold source required in helium concentration, and the independent system is rich in adjusting means and cannot be influenced by upstream operations; and a post-expansion refrigerating system is adopted, so that the natural-gas low-temperature helium extracting system has the operation pressure higher than that in conventional technology, and higher concentration of the helium can also be obtained at the same refrigerating temperature.

The invention provides a method for controlling low temperature refrigeration of an air conditioner. The method comprises the following steps: (1) measuring middle temperature T3 of an outer unit condenser; (2) comparing T3 with first preset values T1 and T3 and a second preset value T2 respectively, wherein T1 is greater than T2; (3) when T3 is greater than T1, raising output voltage U of an external motor so as to increase the rotating speed of an external fan; when T3 is smaller than T2, decreasing the U so as to reduce the rotating speed of the external fan. According to the method for controlling the low temperature refrigeration of the air conditioner, the output voltage U of the external motor is adjusted according to the middle temperature T3 of the condenser so as to adjust the rotating speed of the external fan, and then the T3 is stabilized in a range of T2 to T1. The T3 can reflect the system operation pressure of the air conditioner better, thus the T3 stabilized in the certain range can ensure the working pressure of the condenser, thus the system operation pressure is controlled better; therefore, stable operation of the system is ensured during the low temperature refrigeration of the air conditioner, thus the start and stop times of a compressor are reduced, and the comfort of room is improved.

The invention mainly relates to a reverse-osmosis and ultra-filtration scale inhibitor with the wide suitable salinity range. The inhibitor has the good scale inhibition effect within the wide ionic strength range, and is prepared from one or more of amino trimethylene phosphonic acid (ATMP), phosphono-carboxylic acid (POCA), polyaspartic acid (PASP) and polyamino polyether methylene phosphonate (PAPEMP); by means of the reverse-osmosis and ultra-filtration scale inhibitor, membrane face scaling can be effectively prevented, fouling of a membrane is prevented, and the service life of a membrane system is prolonged. The working pressure and the water production efficiency of the membrane system are kept, and it is prevented that due to fouling, energy consumption of the system is increased. According to the reverse-osmosis and ultra-filtration scale inhibitor with the wide suitable salinity range, the reverse-osmosis scale inhibitor can be suitable for the wide water-quality salinity range (electric conductance is 0 microsecond to 30,000 microseconds) through compounding, and the using effect of the reverse-osmosis inhibitor can be guaranteed within the range.

The invention relates to a solid particle ejecting distributor and an online decoking device. The solid particle ejecting distributor and the online decoking device mainly solve the problems that in the prior art, when a solid particle ejecting distributor is used for ammoxidation, adhering and accumulated coking materials in a gas cooler tube nest are difficult to remove, the resistance of a pipeline of the cooler tube nest is increased, the operation pressure of a reactor is increased, the reaction performance of catalysts is lowered, device consumption is increased, and an operation cycle is shortened. The technical scheme that the body of the solid particle ejecting distributor is cylindrical or conical or spherical or square or polygonal or in the shape of a branch, at least one of the bottom and the side face of the ejecting distributor is provided with a guiding hole or a guiding pipe, the included angle between the center line of the guiding hole or the guiding pipe in the bottom and the perpendicular axis of the distributor is 0-80 degrees, and the included angle between the center line of the guiding hole or the guiding pipe of the side face and the perpendicular axis of the distributor is 1-90 degrees is adopted, the problem is well solved, and the solid particle ejecting distributor and the online decoking device can be used in an industrial plant for online decoking of an ammoxidation gas cooler.

The invention discloses an in-situ leaching uranium mining mine advanced closed solution pumping and injecting system. The system comprises a booster pump room, a wellsite solution injecting booster pump station, solution injecting flow control, a solution injecting well, a solution pumping well, solution pumping flow control, a wellsite solution collecting booster pump station, a water treatmentplant filtering device, a water treatment plant adsorption device and a system pressure stabilizing and flow adjusting device. The system pressure stabilizing and flow adjusting device communicates with the booster pump room. According to the in-situ leaching uranium mining mine advanced closed solution pumping and injecting system provided by the invention, the working form that a solution collecting reservoir and a solution preparation reservoir are arranged in an existing open solution pumping and injecting system is omitted, full-closed operation of pumping and injecting of a leaching solution is achieved, energy wasting caused by pressure relief is avoided, the operating cost is lowered, meanwhile, the release amount of radioactive radon gas in the leaching solution can be decreased easily, and environment pollution is alleviated; and the system provided by the invention adopts a two-stage booster solution injecting mode that the wellsite solution injecting booster pump stations are arranged on all mining area well sites, and the system can effectively adapt to the realistic demand that the leaching solution injecting pressure is different for different mining areas.

The invention discloses a marine diesel engine fuel oil filter with an ultrasonic cleaning device. The marine diesel engine fuel oil filter with the ultrasonic cleaning device comprises a filter shell, wherein the filter shell is provided with an oil inlet, an oil outlet and a sewage outlet used for discharging impurities. The ultrasonic cleaning device acting on the interior of a filter cavity is arranged on the filter shell. The ultrasonic cleaning device comprises an ultrasonic transducer fixed to the filter shell, and a high-frequency vibrating bar which extends into the filter cavity and is used for converting high-frequency electric energy into mechanical energy is connected to the ultrasonic transducer. A filtering method comprises the steps that firstly, a procedure is set; secondly, conventional cleaning is conducted, and conventional cleaning includes (1) high-pressure oil cleaning and (2) high-pressure air reverse-blowing cleaning; and thirdly, deep cleaning is conducted, namely ultrasonic cleaning is conducted. According to the filter, regular automatic cleaning control can be achieved, the automation degree is greatly increased, and the labor intensity of workers is effectively relieved; faults, caused by quality problems of diesel oil, of a diesel engine are reduced, and remarkable economical benefits are obtained on the aspects of saving oil, prolonging the service life of the diesel engine and the like.

The invention belongs to the field of new energy, and particularly relates to a six-tank circulating type marsh gas double-path SOFC anode fuel supply system. Crop straw is adopted as raw materials of the system, six fermentation tanks are designed to enter a marsh gas production period in sequence, two fermentation tanks are kept supplying marsh gas at the same time, and the output flow of the two fermentation tanks is kept to be output in a staggering peak mode. The SOFC anode fuel supply system is designed into a double-path supply system, namely, an A-path system and a B-path system. The A-path system and the B-path system alternately bear a work state and a maintenance and standby state. When a certain device in the anode fuel supply system in the work state breaks down, a corresponding device in the system in the maintenance and standby state is immediately switched to replace the device breaking down to work. The SOFC anode fuel supply system has the advantage of being large and stable in marsh gas supply flow, the needs of SOFC generated power for continuous supplying to the anode fuel supply system are met.

The invention provides a constant-pressure expansion system for high-capacity high-temperature hot water. The constant-pressure expansion system is applied to a hot water circulation system and comprises a closed expansion tank, wherein a water seal is arranged on the upper side of the expansion tank, a steam generator used for generating steam in the expansion tank is further connected to the expansion tank, a pressure relief pipeline and a water replenishing pipeline connected with the pressure relief pipeline in parallel are arranged between the expansion tank and the hot water circulation system, a pressure relief valve is arranged on the pressure relief pipeline, and a variable-frequency constant-pressure water replenishing pump is arranged on the water replenishing pipeline. The constant-pressure expansion system can prevent the expansion tank and the hot water circulation system from being corroded.

The invention discloses a forward and reverse double-flow calcium carbonate filter in the field of industrial water treatment. The structure includes a water pump, a three-way diverter, a calcium carbonate filter column, a submerged elbow with a cover, a gate valve, a check valve, and a casing. The filter can be filtered according to the conventional calcium carbonate filter in the downstream mode, or it can be filtered in a better countercurrent mode by turning on the water pump, which increases the fault tolerance rate of the entire system and can bring out the air bubbles remaining in the filter, ensuring The filter works under a constant pressure to ensure the water flow rate and filtering effect.

The invention discloses a detachable header device applied to coiled pipe high-pressure heaters. The detachable header device comprises a cylindrical header, an end self-sealing manhole cover and a plurality of fixing parts, wherein the end self-sealing manhole cover is provided with a protrusion; the protrusion is inserted into an opening in the cylindrical header; each fixing part penetrates through the end self-sealing manhole cover and is inserted into the side wall at the opening position of the cylindrical header; and a sealing part is arranged between the side wall of the protrusion and the inner wall of the cylindrical header. Through the device, various problems caused by butt welding seams can be avoided; meanwhile, leakage is prevented.

The invention discloses a high-pressure and constant-pressure two-section rubber membrane sealing air cabinet which is safer and more reliable. The air cabinet comprises a cabinet body, a T-shaped fence, a piston device and sealing rubber membranes, the T-shaped fence can rise and fall along the inner side of the cabinet body, the piston device can rise and fall along the inner side of the T-shaped fence, the sealing rubber membranes seal joints of the piston device and the T-shaped fence and joints of the T-shaped fence and the cabinet body respectively, the T-shaped fence comprises a T-shaped fence upper baffle plate and a T-shaped fence lower baffle plate, the piston device is limited to slide below the T-shaped fence upper baffle plate, and the T-shaped fence lower baffle plate limits the piston device to slide in the T-shaped fence above the T-shaped fence lower baffle plate, namely, the piston device is limited to slide in the area between the two baffle plates of the T-shaped fence. The high-pressure and constant-pressure two-section rubber membrane sealing air cabinet is small in pressure fluctuation, large in use space, stable in running, safe, reliable and simple in construction, and can effectively solve the problems that the pressure of the two-section rubber membrane sealing air cabinet is unstable, the T-shaped fence is fixedly clamped, the space of a one-section rubber membrane sealing air cabinet is wasted and the like.