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 nickel-based CO hydrogenation reaction catalyst and its preparation method and application. The components of the nickel-based CO hydrogenation reaction catalyst include nickel oxide, aluminum oxide and additives, and the content of the nickel oxide accounts for The nickel-based CO hydrogenation reaction catalyst accounts for 55-90% of the total mass of the nickel-based CO hydrogenation reaction catalyst, and the content of the auxiliary agent accounts for 1-5% of the total mass of the nickel-based CO hydrogenation reaction catalyst; the particle size of the nickel oxide is 3-17nm. The nickel-based CO hydrogenation reaction catalyst is prepared by co-precipitation method, and the reactivity of the catalyst is improved by adding different kinds of additives, improving the way of adding additives, and improving the drying process, thereby greatly reducing methanation The reaction temperature of the reaction is high, and it can maintain high reactivity and stability under low temperature conditions, so the nickel-based CO hydrogenation reaction catalyst can be used to completely remove CO in hydrogen-rich gases under low temperature conditions.

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 provides a water removing device for an oil storage tank. The water removing device comprises an oil tank filtering separator and a floating ball device, a crude oil inlet pipe is arranged on the bottom of a tank body, and the oil tank filtering separator is used for carrying out oil-water separation on water-contained oil entering the tank body of the oil tank filtering separator through the crude oil inlet pipe; and an inlet of the floating ball device is connected with a liquid outlet in the top of the filtering separator, and oil entering the floating ball device is drained through a siphon device. By means of the oil-water separation process in inner circulation of the water removing device, water is separated and concentrated in the lower tank body of the device after hydrone enters the oil tank from the outside and before the hydrone forms large-scale water mass.

The invention relates to a vacuum heat treatment and subzero treatment integrated machine and belongs to the field of metal heat treatment devices. The vacuum heat treatment and subzero treatment integrated machine is characterized in that four door openings are arranged on the left lateral face and the right lateral face of a middle corridor chamber in a two-to-two symmetrical mode and provided with unsealing and sealing doors which are respectively connected with a material loading and unloading chamber, a vacuum high-pressure gas quenching heating chamber, a vacuum high-pressure gas quenching cooling chamber and a subzero chamber. One unsealing and sealing door is arranged at the outer end of the material loading and unloading chamber, and a rail for enabling a material conveying cart to move is arranged in the middle corridor chamber. A first solenoid valve and a second solenoid valve are arranged on the outer wall of the material loading and unloading chamber, a third solenoid valve and a fourth solenoid valve are arranged on the outer wall of the vacuum high-pressure gas quenching cooling chamber, and a fifth solenoid valve and a sixth solenoid valve are arranged on the outer wall of the subzero chamber. A gas storage tank is connected with a liquid nitrogen valve through a second stop valve, connected with the vacuum high-pressure gas quenching cooling chamber through a first stop valve and the third solenoid valve, and connected with the subzero chamber through a check valve, an air compressor, a sucking pump and the sixth solenoid valve. The vacuum heat treatment and subzero treatment integrated machine has the advantages of saving device investment, reducing material consumption and improving the production rate and product quality.

The invention discloses a batch type nitrogen gas filling single-phase pressure release low cost biological charcoal preparation apparatus and method thereof. The preparation apparatus comprises a container, and at least two protruding open lids which are arranged above the container whose number is identical to that of the protruding open pores, wherein, the diameter of the protruding open pore is 2-5 cm; the lids are covered on the protruding open pores. During preparation of biological charcoal, the biomass raw material is placed in the container, and nitrogen is filled through a protruding open pore, and the other protruding open pores discharge air; the lid is covered on the protruding open pore, and a pyrolysis apparatus is placed in a heating furnace, and the furnace is heated to 350-500 DEG C. for 1-4 hours, and then is cooled to the room temperature, and the substance is fetched from the container for obtaining the biological charcoal. The invention employs the batch type nitrogen gas filling mode to replace a continuous flow of nitrogen, and provides a biological charcoal preparation mode with substantial nitrogen saving and reduced carbon element loss, thereby improving carbon sequestration of biological charcoal and increasing yield of biological charcoal.

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 coal-made gas sulfur-resistant shift system capable of improving the cooling efficiency of shutdown and start-up, comprising a circulating gas compressor, an electric heater, a shift furnace, a shift gas final cooler and an ammonia washing tower connected in series by pipelines. A shutdown water cooling device is installed at the outlet of the circulating gas compressor, and the shutdown water cooling device is connected in parallel with the pipeline between the circulating gas compressor and the electric heater. During shutdown, the high-temperature gas from the circulating gas compressor enters the shutdown water cooling device to be cooled. Water cooling; a start-up cooling water cooling device is set at the entrance of the shift gas final cooler, and the start-up cooling water cooling device is connected in parallel with the pipeline between the shift furnace and the shift gas final cooler, and the high-temperature gas from the shift furnace enters the start-up operation. The cooling water in the water cooling device is cooled to the normal operating temperature of the shift gas final cooler or below, and then enters the shift gas final cooler to prevent the impact of the ultra-high temperature circulating gas on the shift gas final cooler.