35results about How to "Reduce the amount of hydrogen" patented technology

A sulfur recovery and offgas processing device and a method therefor is characterized in that the device comprises a thermal reaction section, a catalytic reaction section and a reducing absorption section. In the thermal reaction section, hydrogen sulfide acid gas is partly burnt in a main burner (1) to convert into sulfur dioxide, hydrogen sulfide and sulfur dioxide proceed claus reaction to generate process gas such as elemental sulphur, the process gas is cooled by a waste-heat boiler (2) and a primary condensate cooler (3) to obtain liquid sulfur; in the catalytic reaction section, the process gas is reacted through a primary reheat hydrogen furnace (4), a secondary steam reheater (7), two stage reactor (5, 8), then separating liquid sulfur is cooled by two stage condensate cooler (6, 9) then enters into the reducing absorption section; in the reducing absorption section, the process gas is heated by a steam heater (10) then hydrogenizated in a hydrogenation reactor (11), cooled in a process gas cooler (12) and enters into a quench tower (13) which top connecting with bottom of a absorber (16), top of the absorber connects with a incinerator (18), the incinerator connects with a chimney (19).

The invention relates to a single crystal silicon chip pre-cleaning solution and a cleaning method thereof. It is characterized in that it consists of the following components: the pre-cleaning liquid is composed of hydrogen peroxide, sodium hydroxide or potassium hydroxide and water. It is characterized in that it consists of the following components: hydrogen peroxide, sodium hydroxide or potassium hydroxide, and water. A cleaning method using a single crystal silicon wafer pre-cleaning solution according to claim 1, characterized in that: putting the silicon wafer inserted into the flower basket into the uniformly mixed single crystal silicon wafer pre-cleaning solution at a temperature of 55 At ~80°C, use ultrasonic cleaning for 60-600 seconds. After ultrasonic cleaning, rinse with deionized water for 1 minute at 60°C. After rinsing with deionized water, take out the silicon wafer and dry it. The invention has the advantages that after using the hydrogen peroxide process, the concentration of alkali is reduced, the amount of hydrogen generated is small, and no bubble marks will be produced on the surface of the silicon wafer, and there will be no drifting and no obvious boundaries. Since the concentration of the alkali is reduced, the amount of thinning is also effectively reduced, which is beneficial to reduce the fragmentation rate of the battery sheet in the subsequent process.

The invention discloses a redox protection device for a stainless steel tube heat treatment furnace, which belongs to the technical field of gas protection for heat treatment furnace devices, and includes a heat treatment furnace, a hydrogen storage tank, a helium storage tank, a hydrogen pipeline, a helium pipeline and a control circuit; The storage tank is connected to the A inlet of the three-way valve through the hydrogen pipeline; the helium storage tank is connected to the B inlet of the three-way valve through the helium pipeline; the outlet end of the three-way valve is connected to the heat treatment furnace; the connection between the three-way valve and the hydrogen storage tank An electric gate valve A and an electric regulating valve are arranged in sequence on the hydrogen pipeline between them; an electric gate valve B is arranged on the helium pipeline; the control loop includes a feedback control system for controlling the oxygen content in the furnace, a feedforward control system for controlling the hydrogen flow in the hydrogen pipeline, and Split-range control system, through the comprehensive regulation of three control systems, the invention can ensure that the stainless steel tube will not be oxidized during heat treatment, ensure the economical use of hydrogen according to the oxygen content in the furnace, and eliminate the possibility of hydrogen explosion.

The invention discloses a hydrogen production method, a hydrogen production system, a hydrogen production electrolyte circulation method and a circulation device. The circulation method includes an oxygen side electrolyte circulation method and / or a hydrogen side electrolyte circulation method; an oxygen side electrolyte circulation method The method comprises the steps of: performing gas-liquid separation on the gas-liquid mixture discharged from the oxygen side of the electrolytic cell to obtain an oxygen-side separation electrolyte; performing step-down gas-liquid separation on the oxygen-side separation electrolyte to obtain a step-down separation electrolyte on the oxygen side; The electrolytic solution is depressurized and separated on the side to boost the pressure and input to the electrolytic cell; the electrolyte circulation method on the hydrogen side includes the steps of: performing gas-liquid separation on the gas-liquid mixture discharged from the hydrogen side of the electrolytic cell to obtain the hydrogen-side separated electrolyte; The electrolytic solution is decompressed and gas-liquid separated to obtain the decompressed and separated electrolyte on the hydrogen side; the depressurized and separated electrolyte on the hydrogen side is boosted and input to the electrolytic cell. The above circulation method can improve the purity of hydrogen and oxygen obtained by electrolyzing water to produce hydrogen, and can also ensure a relatively high system pressure.

Provided is a carbon black which improves the electrical conductivity and flowability of a resin composition. Carbon black characterized by having the following characteristics: 24M4DBP absorption: At least 130 cm 3 / 100 g (1,500 DEG C 30 min) dehydrogenation amount: At most 1.2 mg / g rystallite size Lc: From 10 to 17AA More preferably, it has the following characteristics: itrogen adsorption specific surface area: from 150 to 300 m 2 / g Average particle diameter: from 14 to 24 nm TAB adsorption specific surface area: from 120 to 220 m 2 / g DBP absorption: from 150 to 400 cm 3 / 100 g oxygen-containing functional group density: at most 3 mol / m 2.

The invention is mainly applied to the technical field of furnace pipe heating, and in particular, relates to a cracking furnace pipe in-situ coating treatment heat treatment furnace. The cracking furnace pipe in-situ coating treatment heat treatment furnace comprises a bottom frame, wall plates and a top cover plate to form a furnace cavity; portal frames are distributed in the furnace cavity; the portal frames are mounted on the bottom frame; two layers of cross beams are arranged on the portal frames; bottom electric heating chips are arranged between the adjacent portal frames, and are fixed on the bottom frame; the periphery of the bottom frame is the wall plates; the top cover plate is arranged at the tops of the wall plates; the wall plates on the front and back two sides and the top cover plate are provided with fire observing holes; staff access ports and process pipe outlets are respectively formed in the wall plates at the left and right two ends; and thermocouples, electric wire sleeves and side electric heating chips are respectively arranged on the inner sides of the wall plates on the front and back two sides. The cracking furnace pipe in-situ coating treatment heat treatment furnace can be used for heat treatment of pressure containers, can perform the heat treatment for equipment with different lengths and specifications through such forms as adding of separation plates and heightening, and can achieve multiple purposes.

The invention discloses a high-performance uniformity aluminium alloy ingot and a production method thereof. The high-performance uniformity aluminium alloy ingot comprises the following components in percentage by weight: 2.1-3.8 percent of Cu, 7.6-9.3 percent of Si, 0-0.28 percent of Mg, 0-0.9 percent of Zn, 0-0.8 percent of Fe, 0-0.48 percent of Mn, 0-0.48 percent of Ni, 0-0.1 percent of Ti, 0-0.1 percent of Pb, 0-0.1 percent of Sn, 0-0.25 percent of other trace element sum and the balance of AL. The invention also provides the production method of the high-performance uniformity aluminium alloy ingot. The high-performance uniformity aluminium alloy ingot has even alloying components, effectively controls the problem of component segregation and has good mechanical property and good processing property. The production method of the high-performance uniformity aluminium alloy ingot can effectively remove nonmetal materials in waste aluminium materials and reduces slag generated in as melting process.

The invention discloses a cracked gas compression interstage selective hydrogenation method, belonging to the selective hydrogenation technical field. Aiming at reducing energy consumption and cocking of separation and hydrogenation flows in ethylene unit while reducing energy consumption and coking of cracked gas compressing machine stage and improving application universality and easy operation of the method, mixed phase hydrogenation reaction is carried out between stages of cracked gas compression machine, compressed condensate is taken as liquid phase material flow, hydrogenation is carried out under the presence of catalyst to reduce alkyne and dialkene content in cracked gas, and the material after hydrogenation is cooled and fed into the suction tank at a fourth compression stage. The method of the invention reduces high unsaturated hydrocarbon while consuming part of hydrogen, thus not only reducing energy consumption and coking amount of separation and hydrogenation flows but also reducing coking and energy consumption of compression stage. The method of the invention has wide application and can be used in various cracking separating flows.

The invention discloses a method and device for injecting a sulfur supplementing agent into a hydrogenation reactor in a direct coal liquefaction process. The injecting method comprises the following steps that hydrogen sulfide produced in the direct coal liquefaction process serves as the sulfur supplementing agent to be injected into the hydrogenation reactor. According to the technical scheme, the intermediate raw material hydrogen sulfide from a whole factory directly serves as a vulcanizing agent to be injected into a hydrogenation catalytic cracking reactor in the direct coal liquefaction process. On one hand, the process is shortened, and the energy consumption is reduced; on the other hand, the hydrogen amount consumed when elemental sulfur is adopted as the sulfur supplementing agent to react with hydrogen in the hydrogenation reactor to generate the hydrogen sulfide in the prior art is saved.

The invention discloses high-purity stabilized aluminum alloy ingot which comprises the following components in weight percent: 3.1-3.8% of Cu, 7.9-9.3% of Si, 0-0.1% of Mg, 0-2.3% of Zn, 0-0.9% of Fe, 0-0.5% of Mn, 0-0.5% of Ni, 0-0.35% of Sn, 0-0.1% of Ti, 0-0.25% of other trace elements and the balance of AL. The invention further discloses a production method of the high-purity stabilized aluminum alloy ingot. The high-purity stabilized aluminum alloy ingot of the invention has low gas and slag content, high cleanness of molten aluminum, uniform components of the product and thin crystal structure; and the production method has low production cost and high efficiency, and effectively solves the pollution problem of the secondary aluminum industry.

The invention discloses a high-performance flame-retardant electrolyte. The high-performance flame-retardant electrolyte is prepared from the following raw materials in parts by weight: 80-90 parts of ethylene glycol, 5-10 parts of methylbenzene sulfonate, 5-10 parts of trifluoroacetate, 5-8 parts of polyethylene glycol, 1-2 parts of mannitol, 10-16 parts of silicon dioxide, 20-30 parts of boric acid, 5-15 parts of phosphoric acid, 25-35 parts of acid ammonium mixture, 1-2 parts of hydrogen eliminating agent and 1-3 parts of hydrolysis inhibitor. The high-performance flame-retardant electrolyte is resistant to high temperature and high voltage, and also capable of reducing hydrogen amount generated in the electrolyte working process and lowering electrolyte vapor pressure and hydrolysis reaction, and has flame retardancy; by virtue of the proper amount of added and deposited silicon dioxide, the fluidity of the electrolyte is improved, the adhesive property is lowered and difficulty in electrolyte pouring is effectively lowered; and meanwhile, the high-performance flame-retardant electrolyte is relatively low in cost of the preparation method, easily available in raw materials, simple and concise in process, and has high application prospect.

The present invention relates to a method based on amorphous alloys for supercritical CO 2 In the process of hydrogenation, the solvent and the organic amine are mixed to form a solution in the reactor, the amorphous alloy is selected as the catalyst, and H is added at low temperature 2 with CO 2 , and then warmed to CO 2 The partial pressure reaches a supercritical state, where the reaction produces formic acid and alkane compounds as products. Compared with the prior art, in the present invention, the lower hydrogen-to-carbon ratio and lower reaction temperature are different from traditional CO 2 Hydrogenation catalytic reaction system saves more H 2 Energy and temperature costs.

The invention discloses a degassing process for a low-gas-content centrifugal composite roll. In the process, cone through holes (3) for installing stopper blocks (8) are processed in mounting holes of metal mold hanging handles at both sides of a roll body metal mold (2); after centrifugal casting is completed, the low-gas-content centrifugal composite roll is closed with upper and lower roll necks and casting of a roll heart is completed, the stopper blocks (8) in the cone through holes (3) at both sides of the roll body metal mold (2) are taken out; gas suction joints (10) are arranged; a gas suction pipe of a vacuum pump is connected; the vacuum pump is started to carry out vacuum degassing; and after a casting is cooled, vacuum degassing is stopped, so that most of gas on a working layer of the centrifugal composite roll is removed. According to the invention, gas content of the working layer of the centrifugal composite roll is greatly reduced; mechanical performance of the working layer of the roll is obviously improved; and particularly, plasticity, toughness and contact fatigue resistance of the centrifugal composite roll are improved, so that service life of the centrifugal composite roll, particularly a cold roll, is greatly prolonged.