163results about How to "Reduce carryover" patented technology

The invention discloses a new fluidized bed hydrogenation reactor. The fluidized bed hydrogenation reactor of the invention comprises a cylinder-shaped reactor shell perpendicular to the ground, a three-phase separator arranged at the upper part in the reactor shell and a guiding structure arranged at the middle upper part of the reactor. The guiding structure is an annular convex structure arranged on the inner wall of the reactor and has the lengthwise section of a trapezoid or an arc along the axle of the reactor. The combination of the guiding structure and the three-phase separator increases the operating flexibility of the three-phase separator, and ensures the high-efficiency separation on the three-phase separator, thereby greatly reducing the carrying amount of catalyst. The fluidized bed hydrogenation reactor of the invention can be applied to the chemical reactions between different liquids or gases and solid grains under the condition of contacting, and is characterized by large catalyst inventory, high reactor utility ratio, etc.

The invention relates to the field of production of ultrawhite rolled glass, in particular to a preparation method of solar ultrawhite ultrathin glass and a product thereof. The preparation method of the solar ultrawhite ultrathin glass comprises the following steps of: selecting and preparing raw materials; conveying the raw materials; melting; forming glass; annealing; detecting; and cutting and packaging. In the preparation method, iron content is controlled by taking different measures in the steps of selecting and conveying the raw materials, so that iron sulfide in the final solar glass is greatly reduced and the whiteness of the glass is improved; in the melting process, bubbles in the melted glass liquid is reduced by exhausting air and debubbling, controlling temperature and adding a glass clarifying agent, so that absorption rate is reduced and light transmittance is improved; and the annealing step of the glass finished product is a key link of the production process and plays an important role in the quality of the ultrathin glass product, so the defects that the ultrathin glass is easy to harden and easy to break during production and has high fragility are overcome by controlling rolling velocity, temperature and annealing rate in the process of glass forming and glass annealing.

The invention discloses an improved fluidized bed reactor, which comprises a reactor shell and a three-phase separator, wherein the reactor shell comprises an expanding section and a straight cylinder section from up to bottom; the three-phase separator is arranged in the expanding section; the diameter of the expanding section is 1.2 to 2 times larger than that of the straight cylinder section, and the ratio of the diameter to the height of the expanding section is 0.3-2.0:1. The expanding section and the three-phase separator of the reactor are organically combined, so that the operational flexibility of the three-phase separator is improved, and the highly-efficient separation of the three-phase separator is ensured. The reactor is mainly used for the chemical reaction of various liquids and gases under a condition of contacting solid particles, and has the advantages of large catalyst reserve, high utilization rate of the reactor, simple structure, easy operation and the like.

The invention provides a liquid crystal display device comprising a first glass substrate, a second glass substrate, a liquid crystal layer, a color optical filter, a transparent electrode, a plurality of pixel electrodes and at least one conductive pattern, wherein the liquid crystal layer is arranged between the first glass substrate and the second glass substrate; the color optical filter is arranged on the first glass substrate and comprises a black matrix region and a pixel region; the transparent electrode is arranged between the color optical filter and the liquid crystal layer; the plurality of pixel electrodes are arranged on the second glass substrate; and the at least one conductive pattern is arranged on a non-display region of the second glass substrate and forms an electric field together with the opposite transparent electrode and is used for adsorbing ions so as to reduce the image retention phenomenon in a display region.

A process for pulse electro-deposition nanometer Cr-Ni alloy plating of carboxylic acid or the salt-urea system of carboxylic acid is provided, which relates to the technology for surface engineering and surface treatment, comprises the pretreating and pulse electro-deposition treatment of the plating. The current efficiency of the plating solution system in the invention is up to 45.28%, about 35% higher than the 10% current efficiency in conventional trivalent Cr plating solution system; the toxicity of Cr3+ in the plating solution is only 1% of Cr6+, and the Cr content in the plating solution is only 1/7 of that in the plating solution of chromic acid. The invention is characterized by low toxicity and energy consumption, and greatly reduces the production cost of Cr-Ni plating and the environmental pollution during the production. The nanometer Cr-Ni plating prepared by the present invention is bright, intense, flat, and strongly bonded with the substrate, and is of excellent resistance to wear and corrosion in air. The invention is applicable for corrosion protection and decoration of metallic or metal alloy surfaces.

The invention belongs to the technical field of steel preparation, and particularly relates to a production process for high-purity bearing steel. The production process comprises the following steps: firstly, adding blast-furnace molten iron and steel scrap in an electric converter and smelting; secondly, alloying a steel ladle by virtue of an alloy, an aluminium cake and a low-nitrogen carburant; thirdly, discharging molten steel into the steel ladle subjected to the alloying treatment after the smelting is completed, slagging and enabling the slagging result to meet the requirements of while slag in the earlier stage of refining, obtaining the while slag and then carrying out aluminium line feeding operation; fourthly, hoisting molten steel qualified after the refining into a vacuum tank and carrying out vacuum treatment; and finally carrying out continuous casting. Cancel of molten steel modification treatment is realized; and moreover, the molten steel is high in castability and meets the production requirements of high-standard bearing steel.

The invention discloses a display device comprising a display panel, a grid drive circuit and a source drive circuit. The display panel comprises multiple pixel units which are arranged according to rows and columns, multiple grid scanning lines which are arranged according to the rows, multiple compensation potential lines which are arranged according to the rows and multiple source data lines which are arranged according to the columns. Each pixel unit comprises a thin film transistor, a pixel electrode and a compensation capacitor. The grid drive circuit is used for providing grid voltage to the grid electrodes of the thin film transistors of the pixels of the corresponding row. The source drive circuit is used for providing source voltage to the source electrodes of the thin film transistors of the pixels of the corresponding column so as to set display voltage between the electrode plates of a liquid crystal capacitor. The grid drive circuit comprises multiple grid drive circuits. Each grid drive unit comprises a compensation module and is used for providing compensation voltage to the compensation capacitors of the pixels of the corresponding row in multiple pixels according to a front grid drive signal and a rear grid drive signal. According to the display device, compensation of feed-through voltage can be realized through the grid drive circuit, the compensation capacitors and the compensation potential lines.

A process for preparing high-purity ammonium paramolybdate from ammonium polymolybdate as raw material includes adding purified water and ammonia water, heating while stirring, stirring under a certain steam pressure for evaporation crystallizing while boiling the solution, concentrating, solid-liquid separation, and baking. Its advantages are high purity and high crystallizing rate (94.5-96%.

The invention discloses a method and equipment for preparing electroplating-grade nickel sulfate from nickel-containing wastewater produced in a surface treatment process, and belongs to the technical field of nickel-containing wastewater treatment process. The method is characterized by comprising the following steps: (1) collecting nickel-containing wastewater; (2) performing sedimentation and press filtration on nickel in the nickel-containing wastewater, and smashing nickel mud to obtain nickel slurry; (3) dissolving the nickel slurry into acid; (4) filtering a nickel sulfate solution; (5) removing impurities from the nickel sulfate solution for purification, and performing secondary filtration; (6) performing vacuum evaporative concentration, crystallization, filtration and centrifugal drying on the nickel sulfate solution to obtain nickel sulfate crystals. The invention aims to provide the method and the equipment which can reduce the waste of nickel resources, reduce potential hazard of nickel to the natural environment and realize recycling of the nickel resources and are used for preparing the electroplating-grade nickel sulfate from the nickel-containing wastewater produced in the surface treatment process. The method and the equipment are used for treating the nickel-containing wastewater.

The invention relates to a residual oil hydrogenation method. The method is carried out in a fluidized bed reactor; a three-phase separation region, a fluidizing region and a circulation region are arranged in the fluidized bed reactor in sequence from top to bottom. The residual oil hydrogenation method comprises the steps: injecting a first fluidized bed hydrogenation catalyst from the upper part of the circulation region, and injecting a second fluidized bed hydrogenation catalyst and a suspended bed hydrogenation catalyst from the upper part of the fluidizing region to enable the residual oil and hydrogen to be subjected to the hydrogenation reaction in the fluidized bed reactor, wherein the particle size of the first fluidized bed hydrogenation catalyst is 0.05-0.8mm greater than that of the second fluidized bed hydrogenation catalyst; according to corresponding oxide, the content of the active metal components in the first fluidized bed hydrogenation catalyst is10-80 percent lower than that of the active metal components in the second fluidized bed hydrogenation catalyst. According to the residual oil hydrogenation method disclosed by the invention, better reaction effect can be achieved.

The invention relates to a residual oil hydrogenation method. The method is carried out in a fluidized bed reactor; the fluidized bed reactor comprises a shell (1), a three-phase separation component (2) and an inner pipe (3), wherein the shell (1) comprises an expansion section (11), a transitional section (12) and a straight cylinder section (13) in sequence from top to bottom; the diameter of the expansion section (11) is greater than that of the straight cylinder section (13); the three-phase separation component (2) is arranged in the expansion section (11) and the transitional section (12) to form a three-phase separation region; the inner pipe (3) is arranged at the lower part in the straight cylinder section (13) to form a circulation region and a fluidizing region positioned between the circulation region and the three-phase separation region. The residual oil hydrogenation method comprises the steps: injecting a fluidized bed hydrogenation catalyst and a suspended bed hydrogenation catalyst from the upper part of the fluidizing region to enable the residual oil and hydrogen to be subjected to the hydrogenation reaction in the fluidized bed reactor. According to the residual oil hydrogenation method disclosed by the invention, better reaction effect can be achieved.

The invention discloses a pyrohydrolysis flash separation device, a pyrohydrolysis flash separation technology, a pyrohydrolysis system and a pyrohydrolysis technology. The pyrohydrolysis flash separation device comprises a pyrohydrolysis reaction tank and a gas-liquid separation tank which are communicated through a pipe, wherein a pressure relief valve is arranged on the pipe therebetween. By the pyrohydrolysis flash separation technology, the pyrohydrolysis flash separation device is used for flash separation. The pyrohydrolysis system comprises a slurrying tank, a mud inlet pump, the pyrohydrolysis reaction tank and the gas-liquid separation tank which are sequentially communicated end to end through pipes; the pressure relief valve is arranged on the pipe between the pyrohydrolysis reaction tank and the gas-liquid separation tank. By the pyrohydrolysis technology, the pyrohydrolysis system is used for pyrohydrolysis. The pyrohydrolysis flash separation device and the pyrohydrolysis system have the advantages of small floor area, low production cost, a high safety production factor and the like, and the pyrohydrolysis flash separation technology and the pyrohydrolysis technology have the advantages of a simple process, easy operation, high treatment efficiency, a good gas-liquid separation effect and the like, so that actual treatment needs can be met and an application prospect is very good.

The invention provides a barrel plating device and a barrel plating automatic production line. The barrel plating device comprises a shell, a roller rotationally arranged in the shell, a motor in transmission connection with the roller, a feeding belt used for receiving materials and a discharging belt used for outputting the materials. The feeding belt is arranged at the front end, in the axis direction, of the roller. The discharging belt is arranged at the rear end, in the axis direction, of the roller. According to the barrel plating device and the barrel plating automatic production line, the roller does not need to enter or get out of a trough, the discharging amount of trough liquor is small, consumption is low, and the waste water discharge amount is small.

The invention discloses a dephosphorization method for oxygen top-blown converter slag remainder. The dephosphorization method includes the steps that before slag-splashing for protection of a converter, a dephosphorization agent is added to the slag remainder in the converter after tapping, then inert gases are top-blown by an oxygen gun for the operation of slag-splashing for protection of the converter, and dephoshprized slag remainder serve as initial slag of the next melt of smelting. According to the method, the oxygen top-blown converter slag remainder operation is combined with the slag remainder dephosphorization process, the phosphorus content in the slag remainder can be lowered effectively, and the drag-in amount of phosphorus in the next melt of converter smelting process is lowered, so that the lime addition amount in the next melt of converter smelting process can be reduced, and the converter smelting cost is lowered. By the adoption of the dephosphorization method, part of the phosphorus element in the slag remainder in the converter can be removed, the slag amount is small in the smelting process, the heat loss is low, the iron loss is small, the converter slag dephosphorization effect is good, and the smelting cost is lowered remarkably.

The invention provides a smelting method of low-sulfur and low-boron steel. The steel comprises, by weight, 0.05%-0.18% of C, 0.10%-0.35% of Si, 1.10%-1.60% of Mn, no more than 0.020% of P, no more than 0.003% of S, 0.010%-0.050% of Nb, 0.008%-0.025% of Ti, no more than 0.30% of Ni, no more than 0.20% of Mo, no more than 0.25% of Cr, no more than 0.0005% of B, and 0.010%-0.050% of Als. The smelting process includes a converter, an LF furnace, an RH furnace and CC. Pretreatment for desulfuration is not needed, the carbon content of steel discharged out of the converter is slightly decreased toreduce molten steel w[B], low-B alloys such as manganese metal and mid-carbon ferromanganese are added, liquid cast waste slag is used, and the quantity of recovered liquid cast slag is controlled, sothat rapid slagging and desulfuration are guaranteed, and the quantity of B dragged into slag is reduced; the LF furnace only adopts aluminum wire deoxidation, and a large quantity of argon is blownfrom the bottom to achieve stirring, so that the probability that boric oxide in the slag is reduced and molten steel enters the slag is lowered while the sulfur content in the molten steel is decreased; and when the sulfur content in the molten steel reaches a required sulfur content, the argon blown from the bottom is regulated to be weak, stirring is conducted to reduce the quantity of added B,and an obtained finished products meets w[S]<=0.003 and w[B]<=0.0005.

The present invention belongs to the field of environment protection technology, and is especially one kind of enhanced biological spraying and bubbling gas absorbing purifier. The purifier consists of an atomizing cooler, a spraying and bubbling wash unit, a dewatering unit, an overflow trough, a regeneration pond, etc. The spraying and bubbling wash unit consists of an upper tank, a bubbling pipe, a lower tank and a liquid biological medium layer. Inside the lower tank, there are liquid biological medium layer, stirring pipeline in the bottom and bubbling pipe inserted into the liquid biological medium layer. The present invention has simple structure, reasonably designed pipeline, and easy maintenance.

The invention provides a low-titanium-content double-layer covering agent for silicon steel and a use method of the low-titanium-content double-layer covering agent. The low-titanium-content double-layer covering agent comprises an upper layer covering agent part and a lower layer covering agent part; the lower layer covering agent part is contacted with molten steel; the upper layer covering agent part is located above the lower layer covering agent part; the upper layer covering agent part comprises the following raw materials, by weight percentage, 44-62% of SiO2, 2-10% of MgO, 1-10% of CaO, greater than 0 and less than or equal to 7% of Fe2O3, 20-38% of Al2O3, greater than 0 and less than or equal to 1% of C (all), greater than 0 and less than or equal to 0.5% of TiO2, and the balance ignition lost; and the lower layer covering agent part comprises the following raw materials, by weight percentage, 15-25% of SiO2, 3-8% of MgO, 48-68% of CaO, 2-10% of Fe2O3, greater than 0 and less than or equal to 1% of Al2O3, greater than 0 and less than or equal to 1% of C (all), greater than 0 and less than or equal to 0.2% of TiO2, and the balance ignition loss. With the use of the low-titanium-content double-layer covering agent, the content of titanium in molten silicon steel can be reduced effectively.

The invention discloses a treatment method and device of wastewater containing superfine silicon powder, and belongs to the field of treatment of wastewater containing silicon powder in polycrystalline silicon industry. The method comprises the following steps: with a 20%-32% NaOH solution as a precipitant, adding the wastewater containing the superfine silicon powder, flocculating the superfine silicon powder in the wastewater, and naturally participating for about an hour. By virtue of the high-concentration NaOH solution as the precipitant, the problems that silicon powder particles in the wastewater generated by the cutting process of a silicon core and the like are too small, and high in surface activity, are hydrogenated with water, suspend in water for a long period of time (over half a year) without participation, and are difficult to filter are solved; the burden of an existing filter-press process can be greatly relieved; the filtering efficiency is improved; resource utilization is realized by supernatant alkaline water and filtrate alkaline water for a chlorosilane waste gas leaching process as absorbents; meanwhile, the treatment pressure of a subsequent wastewater treatment system is relieved; and the method and the device are simple in technology in treatment of the wastewater containing the superfine silicon powder, short in flocculation and precipitation time, good in treatment effect and low in cost.

The invention relates to a residual oil hydrogenation method. The method is carried out in a fluidized bed reactor; a three-phase separation region, a fluidizing region and a circulation region are arranged in the fluidized bed reactor in sequence from top to bottom. The residual oil hydrogenation method comprises the steps: injecting a first fluidized bed hydrogenation catalyst from the upper part of the circulation region, and injecting a second fluidized bed hydrogenation catalyst from the upper part of the fluidizing region to enable the residual oil and hydrogen to be subjected to the hydrogenation reaction in the fluidized bed reactor, wherein the particle size of the first fluidized bed hydrogenation catalyst is 0.05-0.8mm greater than that of the second fluidized bed hydrogenation catalyst; according to corresponding oxide, the content of the active metal components in the first fluidized bed hydrogenation catalyst is 10-80 percent lower than that of the active metal components in the second fluidized bed hydrogenation catalyst. According to the residual oil hydrogenation method disclosed by the invention, better reaction effect can be achieved.