33results about How to "To achieve the purpose of deoxygenation" patented technology

The invention discloses a fresh-keeping refrigerator, which is provided with a cooling space and a deaeration device; the deaeration device is arranged outside the cooling space of the refrigerator; a closed deaeration area is separated in the outer shell of the deaeration device by a solid oxide electrolyte plate; the deaeration area is connected correspondingly with the air inlet and the air outlet of the cooling space of the refrigerator through an air inlet pipe and an air outlet pipe; a conductive cathode is arranged beside the deaeration area of the electrolyte plate, while a conductive anode is arranged at the other side of the deaeration area; a heater for heating the solid oxide electrolyte plate is arranged inside the deaeration device; and an air pump is arranged on the pipe communicated between the deaeration device and the cooling space of the refrigerator. Only oxygen ions can pass the electrolyte plate when the electrolyte plate is heated to more than 400 DEG C; the oxygen molecules in the deaeration area get the electrons from the conductive cathode and then turn into oxygen ions; the oxygen ions pass through the electrolyte plate under the effect of the electric field, lose the electrons on the conductive anode and then become oxygen molecules again; and the oxygen molecules are deoxidized through the air pump and then sent into the refrigerator through cooled -hypoxic gas, so that the gas in the cooling space is in a hypoxic state and is more fresh-keeping.

The invention provides a preparation method for low-oxygen spherical aluminum nitride powder and pertains to the field of non-oxide ceramic powder material preparation technology. The low-oxygen spherical aluminum nitride powder can be obtained through the following steps: ball-grinding, evenly mixing and then drying aluminum nitride powder and appropriate amount of spherical auxiliary materials for deoxidation; placing the mixture in a graphite crucible with certain loading density, heating to 1,550 to 1,900 DEG C in N2 or Ar and preserving for 0 to 20 hours, and then cooling with the crucible; mechanically crashing the product and heating to 600 DEG C in a muffle furnace for carbon emission, then washing in a hydrochloric acid solution with 5 to 20 mass percent concentration and fully washing the product after acid cleaning in de-ionized water for 2 to 10 times; after drying, obtaining the aluminum nitride powder with 3 to 15mum median particle diameter, more than 90 percent sphericity and less than 1wt percent oxygen content. The preparation method provided by the invention can achieve spherical particle morphology and granulation at the same time required by the high thermal-conductivity aluminum nitride filling.

The invention provides a continuous blowing and casting method of oxygen-free copper ingots, which pertains to the metal smelting and casting technical field and is carried out according to the technical steps as follows: A. cathode copper is firstly melted in a smelting furnace, and melted copper liquid enters a deoxidation furnace through a bottom blowing chute; B. carbon monoxide gas or the mixed gas of carbon monoxide and nitrogen enters the copper liquid in the bottom blowing chute through the bottom blowing chute and enters the deoxidation furnace with the copper liquid to realize the deoxidation and the degassing of a first stage; C. when passing through a diversion trench arranged in a bottom blowing furnace end, the carbon monoxide gas or the mixed gas of carbon monoxide and nitrogen enters the copper liquid in the diversion trench for realizing the deoxidation and the degassing of a second stage to the copper liquid in the diversion trench; D. the copper liquid after the second stage of deoxidation and degassing enters a crystallizer through a casting gate arranged in the bottom blowing furnace end. The oxygen content of an oxygen-free copper ingot base produced by the method of the invention can stably reach not only less than 5ppm, but also less than 3ppm.

The invention discloses a process of catalytic deoxidation of oxygen-containing coal bed methane and comprehensive utilization of reaction heat; in the presence of a catalyst, methane and oxygen in the raw material of coal bed methane are subject to a catalytic combustion reaction for deoxidation; a lot of reaction heat is released during the reaction process; according to the volume flow rate of the raw material coal bed methane to be processed and the oxygen content of the raw material coal bed methane, a single or a plurality of serially-connected adiabatic reactors are selected as the catalytic reactor; after the reaction, the high-temperature deoxidized gas is subject to four-stage heat recovery; after the four-stage heat utilization, a part of the deoxidized gas enters a next processing section, and a part of the deoxidized gas returns to the deoxidation reaction system; the generated steam is used for pushing the raw material gas and the circulation gas in the deoxidation process to a turbocompressor, or is used for power generation. The process of the invention realizes full and reasonable utilization of heat by reaction heat multistage recovery, effectively reduces process energy consumption, is wide in application scope, and is a clean, low-consumption catalytic deoxidation process for gas rich in combustible gas.

The invention discloses a fire-proof device of a pressurizing nitrogen-making oil tank and a working method thereof, and belongs to the technical field of fire and explosion protection. Bleed air pressure of an engine is increased by using a self-pressurizing mode, and a nitrogen gas with high concentration is separated from the bleed air through a hollow fiber membrane after impurity removing anddrying and is injected to the oil tank through a control system according to the need so that oxygen gas in the oil tank is removed; in addition, a turbo expander and a compressor are combined for generating expansion work, the work output by the expander drives the compressor to compress the bleed air of the engine, the gas pressure is further increased so as to reach the needed pressure of thehollow fiber membrane for separation, and nitrogen-making efficiency is improved. Nitrogen-enriched gas is charged into the oil tank, oxygen content in the oil tank is reduced, and a flow of the gas can be regulated by automatically controlling devices in a nitrogen-charging process, so that needed inert gas is generated. The oil tank is located in a non-combustion state, and the purpose of fire and explosion protection is achieved. The fire-proof device can be automatically controlled, and has the advantages of high inerting efficiency, less energy consumption and the like.

The invention provides a deoxidation method and device for converter gas. The deoxidation method includes the following steps that the converter gas is subjected to dust removal, and the dust content in the converter gas with dust removed is smaller than 5 mg / nm<3>; the converter gas with dust removed is conveyed into a deoxidation device which is filled with stainless steel balls with surfaces plated with copper, the temperature in the deoxidation device is controlled to be 150-300 DEG C, and the oxygen content in deoxidized converter gas is smaller than 200 ppm; the deoxidized converter gas is air-cooled to room temperature and conveyed to a downstream microbial anaerobic fermentation procedure. According to the requirements of raw converter gas in the microbial anaerobic fermentation process, a simple and efficient novel deoxidizing agent is designed, that is, the surfaces of the stainless steel balls are plated with a layer of copper. Oxygen is consumed according to the principle that copper and oxygen react to generate copper oxide, and the aim of deoxidation is achieved. The deoxidation device is easy to design, economical, reasonable and capable of removing oxygen in the converter gas at low energy consumption to meet the requirements of the fermentation process.

A steam supply system for a cigarette factory belonging to the technical field of steam transmission and supply, including boilers, high pressure cylinder, low pressure cylinder, A sub-cylinder for silk production, Heat exchanger, air conditioning cylinder, high-pressure condense water recovery tank, A low-pressure condense water recovery tank and a condense water tank, the boiler is connected with the high-pressure cylinder through the first pipe, the high-pressure cylinder is connected with the low-pressure cylinder through the second pipe, the high-pressure cylinder is connected with the filament-making production cylinder through the third pipe, the low-pressure cylinder is connected with the heat exchanger through the fourth pipe, and the low-pressure cylinder is connected with the air conditioning cylinder through the fifth pipe; The high-pressure steam in the boiler is divided into high-pressure steam and low-pressure steam by the high-pressure cylinder and low-pressure cylinder, and the steam is supplied to different workshops and related equipments respectively, so the utilization efficiency of the steam is improved.

The invention discloses a propylene gas catalytic deoxidation device with temperature and tail gas oxygen concentration control and a method and relates to the technical field of chemical tail gas treatment. A raw material, namely a propylene tail gas, is subjected to heat exchange by using a heat exchanger, is further heated to a reaction operation temperature by using an electric heater and is fed into a deoxidation reactor, the deoxidation reactor is internally provided with a catalyst bed layer, a gas obtained after a deoxidation reaction exchanges heat with the raw material gas, is cooledby using an air condenser and is fed into a gas-liquid separation tank, a liquid phase generated in the reaction process is separated, a gas phase is pressurized by using a compressor and is fed intoa noncondensable gas separation tower, a noncondensable gas is separated from the gas phase, and pure propylene is separated from the liquid phase; and a tail gas oxygen analyzer is arranged on a fourth outlet pipeline, the content of tail gas oxygen can be detected, and reflux treatment is implemented through the fourth outlet pipeline if the content is higher than a normal value. The device isapplicable to process treatment such as temperature runaway of a bed layer and standard exceeding of tail gas oxygen contents caused by reasons such as fluctuation of oxygen contents and degradation of catalyst activity in an olefin deoxidation process.

The invention provides a novel thermodynamic vacuum deaeration system. The novel thermodynamic vacuum deaeration system comprises a softened water tank (10), a softened water pump (20), a coal economizer (40), a deaerator water feeding pump (30), a deaerator (50) and a vacuum ejector (60); a vacuum ejection pipeline for carrying out pressure reduction on the deaerator is connected to the softenedwater tank (10), the softened water pump (20), the vacuum ejector (60) and the deaerator (50); and a water injection pipeline for injecting water into the deaerator is connected to the softened watertank (10), the deaerator water feeding pump (30), the coal economizer (40) and the deaerator (50). The thermodynamic vacuum deaeration system has the advantages of being good in energy saving performance, high in working efficiency, good in waste heat recovery function and the like.

The invention relates to a medical waste comprehensive treatment method. The treatment method depends on a medical waste comprehensive treatment device which comprises a compression chamber, a liquidstirring chamber, a liquid alloy processing chamber, a primary crushing chamber, a fine crushing chamber, a solid disinfection chamber, a classification chamber and a water treatment chamber. After the specific steps, the medical waste can be classified on basis of liquid alloy treatment, water treatment, pyrolysis treatment and electric arc furnace treatment, the specific treatment of different substances in the medical waste can be more effectively carried out after the classification is carried out, so that the treatment efficiency and the treatment effect of the medical waste are greatly improved, and the treatment resources are not wasted.

The invention relates to the field of cast steel, in particular to cast steel. The cast steel is prepared from the following raw materials by mass percent: 0.31%-0.36% of carbon, 0.35%-0.6% of silicon, 1.1%-1.4% of manganese, 0-0.035% of phosphorus, 0-0.035% of sulfur, 0.03%-0.08% of aluminum and the balance of iron. The invention further relates to a production technology of the cast steel. According to the cast steel, the technical problem of low strength of existing cast steel is solved; the tensile strength, elongation percentage, reduction of cross section and impact toughness of the caststeel are 20%-50% higher than similar products; and the cast steel is mainly applied to cast of engineering machinery parts.

The invention relates to a one-stage deoxidizing device for indirect heat-exchange forcible mixed exhaust steam recovery of condensate water and desalted water. A first water inlet pipe, a second water inlet pipe, a third water inlet pipe and a fourth water inlet pipe are connected onto a pressure-bearing buffer tank, wherein the first water inlet pipe and the third water inlet pipe are located on the upper layer, and the second water inlet pipe and the fourth water inlet pipe are located on the lower layer; mixed condensate water is introduced into the second water inlet pipe and the fourth water inlet pipe respectively after subjected to heat exchange with synthesis ammonia desalted water and conversion desalted water through a third heat exchanger and a fourth heat exchanger, the synthesis ammonia desalted water and the conversion desalted water are introduced into the first water inlet pipe and the third water inlet pipe respectively after subjected to heat exchange through the third heat exchanger and the fourth heat exchanger; buffer tank exhaust steam is cooled into buffer tank exhaust steam condensate water by a first heat exchanger, the buffer tank exhaust steam condensate water is injected into the pressure-bearing buffer tank by a condensate water collecting tank and a second water pump, and non-condensable gas is discharged simultaneously; a water outlet pipe of the buffer tank is connected with an inlet of a first water pump, and an outlet of the first water pump is connected to a boiler water replenishing pipe; and a forcible mixing impeller is mounted at the middle-lower part of the inner cavity of the pressure-bearing buffer tank, and a blow-down pipe is connected to a bottom plate of the pressure-bearing buffer tank. According to the device, the utilization rate of condensate water waste heat is high, and the operation is reliable.

The invention discloses a block iron boron compound material and a preparation method thereof. Each element of the block iron boron compound material comprises the following chemical components in percentage by weight: 8.8 to 12.5 percent of B and the balance of Fe and unavoidable impurity elements. A preparation process comprises six steps of batching, adding graphite powder, adding a forming agent, mixing materials, forming and performing vacuum sintering; the finally prepared material is single-phase Fe2B or a material which consists of Fe2B and FeB. According to the block iron boron compound material and the preparation method thereof, oxygen in raw materials is removed by adding the graphite powder and excessive B; a process flow is simplified; the material with excellent performance is prepared; the block iron boron compound material is mainly used for manufacturing an abrasion resistant and corrosion resistant part and a corresponding coating.

The invention provides a preparation method for Fe(OH)3 colloid with a negative zeta potential. The invention is characterized by comprising the following steps: (1) using electrochemical deaeration equipment as operation equipment; (2) preparing softened water by using a sodium ion exchanger without cations and using the softened water as a water supply for the electrochemical deaeration equipment; (3) using iron as an anode of an electrolytic bath of the electrochemical deaeration equipment and a conventional conductor material as a cathode; (4) allowing Fe2<+> produced after consumption of iron of the anode of the electrolytic bath to combine with OH<-> produced by the cathode so as to generate Fe(OH)2, and dissolving Fe(OH)2 in the softened water to allow oxygen to react so as to produce the Fe(OH)3 colloid with a negative zeta potential. The invention has the advantages of an obvious effect and strong operability.

The invention relates to a sulfur-phobic process for deeply transforming calcium carbide tail gas.By the aid of the sulfur-phobic process, problems of complicated procedures and high investment cost and running cost of existing processes can be solved.The technical scheme includes that the sulfur-phobic process comprises steps of preheating the calcium carbide tail gas, then dividing the calcium carbide tail gas into three branches, mixing the first branch of calcium carbide tail gas and partial transformation product gas with each other to obtain a first mixture, filling the first mixture with steam, preheating the first mixture and the steam by a No.1 tail gas preheater, and then delivering the first mixture and the steam into a No.1 transformation furnace to transform the first mixture and the steam; mixing transformed gas exhausted from the No.1 transformation furnace with the second branch of calcium carbide tail gas to obtain a second mixture, filling the second mixture with steam, delivering the second mixture and the steam into a No.2 transformation furnace to transform the second mixture and the steam, delivering transformed gas exhausted from the No.2 transformation furnace into the No.1 tail gas preheater, carrying out heat exchange cooling on the transformed gas and mixed gas before the mixed gas is delivered into the No.1 transformation furnace, then mixing the transformed gas with the third branch of calcium carbide tail gas to obtain a third mixture, filling the third mixture with steam by the aid of a No.3 mixer, preheating the third mixture and the steam by the aid of a No.2 tail gas heat exchanger, feeding the third mixture and the steam into a No.3 transformation furnace, further transforming transformed gas exhausted from the No.3 transformation furnace, recycling heat of the transformed gas, or directly recycling the heat of the transformed gas without further transforming the transformed gas and separating condensed liquid from the transformed gas to obtain transformed product gas.The sulfur-phobic process has the advantages of simplicity and low investment cost and running cost.

The invention discloses a foaming system for air foam flooding. The components and their weight percentages are: 30%-50% of surfactant, 2%-13% of stabilizer, 20%-25% of deoxidizing aid, The amount is water. The foaming system for air foam flooding of the present invention is suitable for oil reservoirs with a temperature of 40-80 DEG C, and has strong foaming performance, foam stabilizing performance and oxygen removal ability. It also discloses its preparation method, in which a stabilizer is added during the preparation process, no additional stabilizer is needed during construction, no need to add an oxygen removal device at the wellhead to deoxidize the air, and after being injected into the formation alternately or together with the air, it has a relatively Strong plugging performance, and can greatly reduce the risk of oxygen intrusion into the oil well, and realize the safe, efficient and low-cost operation of air foam flooding.

The invention relates to the technical field of steelmaking, in particular to a process for hydrogen blowing deoxidation of molten steel. Molten steel obtained after converter steelmaking is finished is transferred to a steel ladle; the molten steel in the steel ladle is subjected to bottom blowing through hydrogen so that the oxygen content of the molten steel can be reduced, and according to the technological parameters of bottom blowing, if the carbon content of the molten steel ranges from 0.01% to 0.04% by mass, the strength of the hydrogen ranges from 500 NL / min / T to 1000 NL / min / T, and the bottom blowing time ranges from 10 min to 50 min; if the carbon content of the molten steel is 0.041%-0.1% by mass, the strength of the hydrogen ranges from 200 NL / min / T to 499 NL / min / T, and the bottom blowing time ranges from 10 min to 50 min; if the carbon content of the molten steel is larger than 0.1% by mass, the strength of the hydrogen ranges from 30 NL / min / T to 199 NL / min / T, and the bottom blowing time ranges from 10 min to 50 min. According to the process, the content of dissolved oxygen in the steel is reduced to 20 ppm or below, and the molten steel subjected to deoxidization treatment is subjected to a subsequent process, so that pollution of inclusions to the molten steel can be effectively avoided, the purpose of deoxidization is achieved, and meanwhile, the molten steel is subjected to ultra-purification.

The invention relates to a primary deoxidizing device for performing indirect heat exchange on condensed water and desalted water and recovering exhaust steam. A pressure-bearing buffer tank is provided with first and third water inlet pipes positioned on an upper layer as well as second and fourth water inlet pipes positioned on a lower layer; mixed condensed water is introduced into the second and fourth water inlet pipes respectively after undergoing indirect heat exchange with synthetic ammonia desalted water and transformed desalted water through third and fourth heat exchangers respectively; the synthetic ammonia desalted water and the transformed desalted water are introduced into the first and third water inlet pipes respectively after undergoing heat exchange through the third and fourth heat exchangers; buffer tank exhaust steam enters a first heat exchanger to be cooled into buffer tank exhaust steam condensed water, the buffer tank exhaust steam condensed water is replenished into the pressure-bearing buffer tank through a condensed water collecting tank and a second water pump, and meanwhile non-condensable gas is exhausted; a water outlet pipe of the buffer tank is connected with the inlet of a first water pump; the outlet of the first water pump is connected to a water replenishing pipe of a boiler; a bottom plate of the pressure-bearing buffer tank is connected with a blow-off pipe. The device is high in residual heat utilization ratio of condensed water, and runs reliably.

The invention discloses a tubular chain plate pyrolysis dry distillation furnace. The tubular chain plate pyrolysis dry distillation furnace comprises a chain and seamless tubes, wherein the chain isin inserted connection to the inner part of the seamless tubes, scraping plates are mounted on the surface of the chain, a main rotating box and a driven box are fixedly connected to the two ends of each seamless tube, a capstan is in transmission connection to the surface of the chain, a connecting shaft is in clamping connection to the axle center of the capstan, a driving gear and a driven gearare in clamping connection to the surface of the connecting shaft, one end of the driving gear is fixedly connected with the output end of a motor, the driving gear and the driven gear are wholly mounted in a driven box, and a feed opening and a discharge opening are fixedly connected to the upper side and the lower side of each seamless tube. According to the tubular chain plate pyrolysis dry distillation furnace, through cooperative arrangement of the chain and the scraping plates, the chain drives the scraping plates to orderly move in the seamless tubes, so that the purposes that materials are not wound together and are not stuck to walls when the materials are transported for work can be achieved, greenhouse effects cannot appear in the production process, the pyrolysis time is accordingly shortened, and the treatment capacity in unit time is accelerated and increased.

The invention discloses a high-oxygen-resistant medium-temperature hydrolysis catalyst and a preparation method thereof. According to the catalyst, a TiO2-SiO2-MnO2 composite oxide is used as a carrier, Li-W-Cs is used as an active component, and Cu is used as an auxiliary agent. Under certain temperature and pressure conditions, a titanium source, a silicon source, a manganese source, a templateagent and the like react in a high-pressure synthesis kettle to prepare the carrier, then active components are added for ion exchange, and the catalyst is obtained after filtering and roasting. The catalyst has the characteristics of high hydrolysis conversion rate and long service life, and can be used for hydrolysis removal of COS in various oxygen-containing industrial raw materials such as water gas, semi-water gas, coke-oven gas, blast furnace gas and the like.

The invention discloses an automatic condensation water return system which is characterized in that a condensation water recovery tank is connected with a boiler through a deaerator; the deaerator comprises a deaeration head and a water storage tank; the deaeration head is connected with the condensation water recovery tank through a steam pipeline; the bottom of the water storage tank is provided with a communicating pipeline; the bottom of the condensation water recovery tank communicates with the bottom of the deaerator through the communicating pipeline; an electric valve is arranged in the middle of the communicating pipeline; the top of the condensation water recovery tank is provided with an automatic pressure regulating device; the automatic pressure regulating device is used for regulating the steam pressure of the condensation water recovery tank through a pressure regulating valve; the side end of the condensation water recovery tank is provided with a liquid level meter. By using the automatic condensation water return system, the self working pressure of the condensation water recovery tank can be regulated, and the pressure difference between the condensation water recovery tank and the deaerator is made artificially, so that the automatic control of liquid levels of the condensation water recovery tank and the deaerator can be realized; and the deaerator head is used for carrying out thermal deaeration on reverse-osmosis water entering the deaeration head by virtue of flash vaporization steam generated by returned condensation water, and the communicating pipeline is used for returning condensation water to the deaerator, so that the equipment fault is reduced, water and electricity are saved, and equipment operation safety is greatly improved.