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

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 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 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 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 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 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.