53results about How to "Save nitrogen" patented technology

The present invention discloses a Chinese milkvetch cultivation method in rice field, and relates to a Chinese milkvetch cultivation and utilization technique under the condition of paddy field rice-green fertilizer rotation cropping system. It is characterized by intersowing Chinese milkvetch seeds in the rice field, and adopting a series of measures of channelling and discharging water after the rice is harvested so as to implement said invention.

The invention discloses a coloring and curing mechanism of an optical fiber coloring machine and belongs to the technical field of optical cable processing devices. The optical fiber coloring machine comprises a machine frame box body, and the coloring and curing mechanism comprises a nitrogen inlet pipe provided with a first pressure regulating valve, a printing ink tank, a curing oven and an optical fiber guide device, wherein the printing ink tank and the curing oven are arranged on the machine frame box body; the nitrogen inlet pipe is provided with a three-way connector which arranged in the nitrogen inlet pipe at a position on the air outlet side of the first pressure regulating valve and is connected with the pipes of the printing ink tank and the curing oven respectively; and a second pressure regulating valve is arranged on the pipe connecting the three-way connector and the curing oven. The coloring and curing mechanism of the optical fiber coloring machine has the advantages of increasing nitrogen volume acquired by the printing ink tank, preventing excess nitrogen flow in the curing oven, improving the coloring speed, guaranteeing processing efficiency, saving nitrogen and protecting environment.

The invention provides a post-processing method for polypropylene powder, which belongs to the petroleum chemical field. In the polypropylene post-processing method of the prior art, the method comprises the following steps: polypropylene powder which departs from a polymerization system and is carried out preliminary gas/solid separation enters into a drier, indirectly heated through steam and nitrogen is introduced, hydrocarbons can be removed in powder and then enters in a steamer, nitrogen and water vapor are introduced for inactivation of a catalyst; or the polypropylene powder which departs from a polymerization system and is carried out preliminary gas/solid separation enters into a degassing chamber, water vapor-containing nitrogen is introduced in the degassing chamber; the present invention modifies the prior art. The post-processing method of the invention comprises the following steps: introducing water vapor, modifying the drier to a steam drier used for recovering hydrocarbons and inactivating the catalyst, introducing a hydrocarbons-removed polymer in the steam drier (or a degassing chamber), adding nitrogen without water vapor in the steam drier, modifying the steam drier to a moisture eliminator used for removing water vapor in powder. The method of the invention is capable of thoroughly recovering hydrocarbons which depart from the polymerization system by an economic method, reducing the unit consumption and energy consumption, and thoroughly solving the problem on environmental protection.

The invention discloses a copper pipe processing technology, which comprises the following steps: selecting a copper pipe billet stretched in series; putting the copper pipe billet into a coil drawing machine, injecting lubricating oil into the inner wall of the copper pipe, and drawing Stretching; after the stretching is completed, the copper tube is finished and wound; annealed; the finished product is put into storage. The processing technology of the invention eliminates the generation of cleaning waste liquid and waste, improves production efficiency, and realizes high efficiency, cleanness and environmental protection in the production process of copper pipes.

The invention discloses a scattered oil recovery device. The scattered oil recovery device comprises a collecting tank, a mobile platform, an oil drain pipe, a gas inlet pipe and an exhaust pipe, wherein the collecting tank is a pressure-withstanding tank and arranged on the mobile platform, an oil filling port is formed in the top of the collecting tank, a first valve is arranged at the oil filling port, an input end of the oil drain pipe communicates with the bottom of an inner cavity of the collecting tank, a second valve is arranged on the oil drain pipe, an output end of the oil drain pipe is used for communicating with a slop tank, an input end of the gas inlet pipe is used for communicating with nitrogen supply equipment, an output end of the gas inlet pipe communicates with the topof the inner cavity of the collecting tank, a third valve is arranged on the gas inlet pipe, an input end of the exhaust pipe communicates with the top of the inner cavity of the collecting tank, anda fourth valve is arranged on the exhaust pipe. The invention further discloses a scattered oil recovery method. According to the scattered oil recovery device and method, scattered oil discharged from the tank body can be recovered to the slop tank safely, reutilization of the scattered oil is facilitated, and safety is high.

The invention discloses a nickel-based CO hydrogenation catalyst, a preparation method therefor and an application of the nickel-based CO hydrogenation catalyst. The nickel-based CO hydrogenation catalyst is prepared from the ingredients, i.e., nickel oxide, aluminum oxide and auxiliaries, wherein the content of the nickel oxide accounts for 55% to 90% the total mass of the nickel-based CO hydrogenation catalyst, and the content of the auxiliaries accounts for 1% to 5% the total mass of the nickel-based CO hydrogenation catalyst; and the nickel oxide has the particle size of 3nm to 17nm. The nickel-based CO hydrogenation catalyst is prepared by adopting a coprecipitation method; through adding the auxiliaries of different kinds, improving an auxiliary adding mode and improving a drying process, the reaction activity of the catalyst is improved, and thus, the reaction temperature of a methanation reaction can be greatly lowered; and very high reaction activity and stability can be maintained under low-temperature conditions, so that the nickel-based CO hydrogenation catalyst can be applied to the complete removal of CO from hydrogen-enriched gases under the low-temperature conditions.

The invention provides a fire extinguishing device in a coal mine gob. A nitrogen generation device is connected with a nitrogen purification device through a pipeline. The nitrogen purification device is connected with a nitrogen pressurization device through a pipeline. The nitrogen pressurization device is connected with a low-temperature processing pump through a pipeline. The low-temperature processing pump is connected with a nitrogen liquefying device through a pipeline. The nitrogen liquefying device is connected with a jetting device through a pipeline. The tail end of the jetting device is provided with a nozzle. The jetting distance of the nozzle and the nitrogen jetting pressure can be adjusted. According to the fire extinguishing device, the jetting distance and the nitrogen jetting pressure of the arranged nozzle can be adjusted so that the specific conditions of nitrogen jetting can be adjusted according to the needs of practical fire distinguishing conditions, the nitrogen amount can be effectively saved, in addition, the special nitrogen generation device is arranged and purifying and oxidizing are conducted so that high-purity preparing of nitrogen can be effectively achieved, and the fire distinguishing effect is improved.

The invention relates to the field of metallurgical feeding system feed openings, and specially provides a double-layer flap valve blanking system. A novel double-layer flap valve device comprises a blanking hose pipe (1), double layers of turning plates (2), a cylinder (3), a lever (4) and air holes (5) which are uniformly distributed in the periphery of the central part of the hose pipe. A PLC controls the cylinder to turn over the turning plates, and controls gas flowing into trip valves (9), (10), (11), and a combination mode of gas and the double layers of turning plates is employed for seal to prevent high temperature flue gas from going upwards. The double-layer flap valve blanking system is compact in structure and good in seal performance, and is safe and reliable.

A process for unloading catalyst from petrochemical equipment features that before the catalyst is unloaded, it is immersed in oil phase compared from solvent and filming agent for 4-10 hr or cyclically contacted with said oil phase for 10-30 hr to generate a layer of film on the surface of catalyst, resulting in no generation of ash dust.

The invention discloses an auxiliary die adjusting system of a vertical type extrusion casting machine and relates to the technical field of casting machines. The auxiliary die adjusting system comprises a nitrogen gas cylinder and a tail board. Two sides of the tail board are respectively provided with one auxiliary die adjusting cylinder, piston rods of the auxiliary die adjusting cylinders are respectively connected with two sides of the tail board, each auxiliary die adjusting cylinder is divided into a front cavity and a rear cavity, the front cavities are communicated with a nitrogen gas cylinder pipe, the rear cavities are communicated with the atmosphere, and a high-pressure air valve is arranged on a pipe between the nitrogen gas cylinder and the front cavities. The auxiliary die adjusting system of the vertical type extrusion casting machine facilitates die adjustment, reduces abrasion of draglinks and threads of adjusting nuts and saves nitrogen gas.

The invention discloses a method for processing a methyl iodide-contained combustible gas discharged into a torch system by a carbonylation compounding device. The methyl iodide-contained combustible gas discharged into the torch system by the carbonylation compounding device enters a torch water seal tank firstly, and then is discharged into the torch system; after being collected, the methyl iodide-contained sewage generated in the torch water seal tank carries out film concentration processing to obtain concentrated methyl iodide wastewater; the concentrated methyl iodide wastewater and acetic anhydride carry out hydration reaction to remove water; and a reactant is used as one part of carbonylation reaction raw materials and returned to a carbonylation compounding system. The invention solves the problem that the methyl iodide wastewater can not be processed by a common environmental protection approach; and by adopting the method, the torch system of the carbonylation compounding device of acetic acid, acetic anhydride, and the like can be provided with the water seal tank which strengthens the safety of the torch system and can save nitrogen.

The invention discloses a method for continuously synthesizing isoproturon. The method comprises the steps of: taking isopropylaniline as an initial raw material, carrying continuous kettle type phosgenation reaction on isopropylaniline with phosgene, then performing continuous thermal decomposition to obtain isopropylphenyl isocyanate, and carrying out kettle type continuous amination reaction onisopropylphenyl isocyanate and dimethylamine to obtain the product isoproturon. According to the invention, continuous production of isopropylphenyl isocyanate is achieved, and continuous tower-typethermal decomposition and light driving are adopted to replace kettle-type light driving, so that nitrogen is saved, and the operation machine hour is reduced; unreacted phosgene is pumped into the photochemical kettle again for reaction after being cooled, separated and absorbed by methylbenzene, so that the phosgene utilization rate is increased, and the phosgene tail gas treatment cost is reduced; and continuous automatic operation of isoproturon synthesis is achieved.

The invention discloses advanced special equipment for large-area preparation of a perovskite solar cell, and belongs to the technical field of photoelectricity. The equipment is composed of a preparation chamber, a sample preparation chamber, a heating chamber, a glass cavity, a heating plate and a panel control module. The preparation chamber includes a sample transmitter and a gas inlet. The sample preparation chamber comprises a scraper, a nitrogen knife, a solution funnel, a sample conveyor and a heating plate. The solution funnel has dual functions of storing and heating the solution, and the temperature is controllable from room temperature to 80 DEG C. The sample preparation chamber heating plate has double functions of heating and fixing a sample, and consists of a resistance wire, an air hole and an air pump; the panel control module is composed of a temperature control module, a sample transmission module, a scraper control module, a nitrogen knife control module, a solutioncontrol module and the like. The method overcomes the property that perovskite is afraid of water and oxygen and is difficult to prepare, and good equipment is provided for industrial development.

The invention discloses full-automatic low-temperature storage equipment for stem cells, and relates to the technical field of low-temperature storage. The full-automatic low-temperature stem cell storage equipment comprises a cooling device, the cooling device comprises a cooling shell, a placement device is arranged at the center of the interior of the cooling shell and comprises a placement shell, an upper end opening of the placement shell is flush with an upper end opening of the cooling shell, and the lower end of the placement shell is located above the lower end of the cooling shell; a bottom hole is formed in the middle of the lower end of the containing shell in a penetrating mode, side holes are formed in the left side wall and the right side wall of the middle of the containing shell in a penetrating mode, and a communicating device is arranged at the lower end of the interior of the cooling shell and comprises a bottom column. According to the full-automatic low-temperature storage equipment for the stem cells, a worker cannot be in contact with the temperature of nitrogen, so that test tubes filled with the stem cells can be safely taken out.

The invention discloses a nitrogen saving system based on a BTU reflow oven and a control method thereof, the nitrogen saving system comprises a PLC control module, a flow valve and a touch screen display, the flow valve is arranged on a nitrogen pipeline to regulate and control the flow of nitrogen, and the PLC control module is respectively connected with the flow valve and the touch screen display to control and regulate the flow valve. According to the nitrogen saving system based on the BTU reflow furnace and the control method of the nitrogen saving system, two nitrogen saving modes are set in the system, so that during normal production, the first nitrogen saving mode is automatically triggered, 25% of nitrogen can be saved, and when no circuit board exists in the BTU due to abnormal production, the second nitrogen saving mode is automatically triggered, and 50 amp can be saved; the nitrogen conveying accuracy and efficiency are improved, the cost is reduced, and energy is saved.

The invention relates to a pulse dry recovery and purification system and method for coal gas of a medium-high pressure gasification furnace, and the system comprises a medium-high pressure coal gas gasification furnace, heat exchange equipment, separation equipment, a dust removal system and a clean coal gas pipe network which are connected in sequence, and the dust removal system comprises a low-pressure pulse bag type dust remover and a depressurization clean coal gas reverse injection system; the low-pressure pulse bag type dust collector is used for filtering and purifying dust-containing coal gas into clean coal gas with the dust content of 5 mg/m < 3 > or below, and the depressurization clean coal gas reverse injection system is used for reducing the gas pressure in the low-pressure pulse bag type dust collector and then carrying out filter bag pulse dust collection; the depressurized clean gas reverse injection system comprises a high-pressure clean gas pressure relief system, a discharged clean gas recycling and pressurizing system, a high-pressure gas storage tank and a clean gas injection gas source pipeline with a pulse valve. The method has the advantages that the technical problem that pulse ash removal cannot be carried out on the medium-high pressure coal gas is solved, the problem that dry recovery of the coal gas of the medium-high pressure gasification furnace is difficult is solved, and the requirements of energy conservation, emission reduction and environmental protection policies are met.