58results about How to "Full contact time" patented technology

The invention relates to a method for preparing a molecular sieve, which comprises the following steps: the molecular sieve is introduced in a gas phase ultra-stable reactor, the gas phase ultra-stable reactor is capable of moving the molecular sieve from the molecular sieve inlet of the gas phase ultra-stable reactor to the molecular sieve outlet of the gas phase ultra-stable reactor under the condition that carrying gas is not used for conveying, and the molecular sieve and gas-phase silicon tetrachloride are contacted for reacting in the gas phase ultra-stable reactor. The conveying of the molecular sieve does not require inertia carrying gas, the technology flow is simplified, carrying gas amount is saved, and the consumption of silicon tetrachloride can be greatly reduced.

The invention relates to a method designing a multi-overflow tray by an equal residence time method, which is intended to raise tray mass transfer efficiency and processing capability, and alleviate amplification effect of equipment. The method is defined by residence time of the liquid on a tray bubbling zone, integrates advantages using an equal channel length method and an equal bubbling area method, takes regard of a contraction effect of a tower wall to a liquid flow and influence of physical property condition on the flow, and provides a calculating formula of the channel length in the tray bubbling zone under the equal residence time. Downcomer weirs on the edge at two sides of the tray are in a backswept weir structure, in order to increase overflow circumference length of the downcomer at two sides. A lower edge of an eccentric downcomer uses an arc or tooth-form structure, in order to balance a bottom gap outlet area of the downcomer. A liquid distribution plate is arranged in a liquid accepting plate, in order to balance liquid flow distribution at two sides of the downcomer. The method enables the liquid flow on each tray bubbling zone to have similar residence time and mass transfer efficiency, and achieves effects of reasonably distributing liquid, promoting gas and liquid uniform distribution and alleviating amplification effect of the tower equipment. The method is particularly suitable for large-scale tower equipment with high gas-liquid phase load.

The invention relates to a device for performing pyrolysis on solid fuel and performing reductive coupling on iron ore. The device comprises a pyrolysis reactor, a counterflow moving bed reactor, a condensation separator, a gas purifier and a liquid purifier. A method for performing pyrolysis on the solid fuel and performing reductive coupling on the iron ore comprises the following steps of: performing pyrolysis on the solid fuel in the pyrolysis reactor under the action of inert gas or hydrogen-enriched reductive gas to obtain pyrolytic tar, pyrolysis gas and a semicoke product; feeding the pyrolytic tar and the pyrolysis gas into the counterflow moving bed reactor and performing countercurrent contact on the pyrolytic tar, the pyrolysis gas and the iron ore in the reactor to ensure that heavy components in the pyrolytic tar are subjected to pyrolysis continuously under the action of the iron ore to obtain light tar, and reducing the iron ore to obtain elementary substance iron; and condensing the generated pyrolysis gas and the light tar, separating and purifying to obtain the pyrolysis gas and the light tar product. The method has the characteristics that the light tar is obtained by performing pyrolysis on the heavy components in the tar by using the natural iron ore, so that the quality of the tar is improved; and meanwhile, the iron ore is reduced to form the elementary substance iron, so that the grade of ore is improved.

The invention discloses a preparation method of a stainless steel-magnesium alloy composite plate, and belongs to the field of metal composite plate machining. The problem that the application of thestainless steel-magnesium alloy composite plate in the industrial field is restricted due to the fact that the stainless steel-magnesium alloy composite plate with good interface connection is difficult to form according to an existing forming method is solved. The preparation method adopts the structure of wrapping sealing, so that the problem of liable oxidation in the heating process of magnesium alloy can be effectively solved, and therefore, no additional inert gas needs to be applied for protection during the heating process. As a transition element, a silver coating on the surface to bebonded can improve the wettability of the magnesium alloy on the surface of stainless steel and promote the metallurgical bonding of the bonded surface. A hot pressing furnace is heated to a temperature higher than the melting point of the magnesium alloy, heat preservation and pressure maintaining are carried out for a period of time, so that the contact time between a magnesium alloy melt and the stainless steel surface is sufficient, and interface elements are more conducive to diffusing under the pressure. The prepared stainless steel-magnesium alloy composite plate has good bonding interface quality, high tensile strength and good corrosion resistance performance.

The invention discloses a method for manufacturing a magnesium alloy-stainless steel composite board, which belongs to the field of metal composite board processing and aims to solve the problem thatapplication, in the industrial field, of the magnesium alloy-stainless steel composite board with relatively good interface connection, which is difficulty formed by an existing forming method, is restrained. A packaging and sealing structure can be adopted to effectively solve the problem that oxidization is easily caused in a magnesium alloy heating process, so that inert gas does not need to additionally apply in a heating process for protection; a silver-coated layer of a to-be-combined surface can be taken as a transition element to improve wettability, on a stainless steel surface, of amagnesium alloy, so that metallurgical bonding of the combined surface is promoted; the temperature of a heating furnace exceeds a melting point of the magnesium alloy, and the magnesium alloy is quickly discharged out of the furnace for being quickly cooled after heat is preserved, so that magnesium alloy melt has sufficient contact time with the stainless steel surface, and therefore, diffusionof the interface element is facilitated; besides, the packaging sealing structure further can prevent the magnesium alloy melt from being heated to expand, so that pressure does not need to additionally apply through the method, relatively great stress is generated on the combined interface, and diffusion connection of the combined interface is promoted.

The invention discloses a chroming mist recycling method. A pure physical method is adopted for absorbing chroming mist generated in an electroplating production process into serially connected recycling treating units through a notch fan cover and then performing the processes of diffusing, colliding, coring, agglomerating and settling, so that the chroming mist is stopped and absorbed to the surfaces of a baffle plate and a filling material, and meanwhile, the chroming mist is intermittently and circularly flushed back to the present collecting tank, so that the chroming mist is intercepted, captured and recycled. No wastewater is discharged in the whole process, so that the purpose of environment-friendly emission of the chroming mist is achieved.

The invention relates to the technical field of solder paste production and processing, and discloses a stirring process based on solder paste production. The stirring process is carried out by a solder paste stirring device which comprises a stirring barrel, a stirring shaft, a discharging box, a rack and a motor, wherein the stirring barrel is fixedly mounted on the rack; the stirring shaft is mounted in the stirring barrel; the discharging box is located above the stirring barrel and is fixedly connected with a lower part of the motor; the motor is fixedly mounted on the rack; an airbag isarranged on one side of the stirring barrel; an air cavity communicated with the airbag is formed in the stirring barrel; a dispersing mechanism is arranged on a side wall of the stirring barrel; thedispersing mechanism comprises a fixed base, a rubber bag and an extruding part; an inner cavity communicated with the air cavity is formed in the fixed base; an air outlet check valve with an air outlet toward the stirring shaft is arranged on the fixed base; the extruding part is fixedly mounted on the rubber bag; the rubber bag is communicated with the inner cavity; a material cavity communicated with the discharging box is formed in the upper part of the stirring shaft; a discharge hole is formed in the side wall of the material cavity. The stirring process provided by the invention has agood stirring effect and reduces production of bubbles of solder paste.

The invention discloses a spray type dust fall device. The spray type dust fall device comprises a water storage device, a water pump, a rotary device and a spraying device. A water outlet of the water storage device is connected with a water inlet of the water pump. A water outlet of the water pump is connected with a water inlet of the spraying device. The water pressure at the water outlet of the water pump ranges from 4MPa to 15MPa. The spraying device comprises a spray head body, a short-range spray nozzle and a remote spray nozzle. The short-range spray nozzle and the remote spray nozzleare fixed to the front end of the spray head body from top to bottom in sequence. The rotary device is in rigid connection with the spray head body and is used to enable the front end of the spray head body to horizontally rotate clockwise or anticlockwise. According to the spray type dust fall device, because the water storage device, the water pump, an action mechanism and the spraying device are used in cooperation, sprayed water mist is uniform in mist droplets, large in density and broad in coverage area; and the spray type dust fall device is especially suitable for water mist spray ofa wide range.

The invention discloses a technology for catalysis and quality improvement by using waste gasified gases. A catalyst used for catalytic cracking of tar in gasified gases is selected from bottom slag in a domestic waste fluidized bed incinerator, crushed and activated bottom slag has a certain aperture structure, and calcium oxide and waste iron in the bottom slag have a catalytic cracking effect on the tar. The waste gasified gases are in full contact with the bottom slag catalyst in a multi-hearth furnace, the tar undergoes thermal cracking and catalytic cracking on the surface of the catalyst, and solid particles delay in the multi-hearth furnace. H2 generated after cracking of the tar reduces iron oxides in the catalyst into elemental iron, and CO2 and water vapor in the gasified gases react with carbon deposited on the surface of the catalyst to maintain the activity of the catalyst. The technology fully utilizes the bottom slag of the domestic waste fluidized bed incinerator, realizes waste recycling, realizes decomposition of dioxins in the bottom slag, also realizes recycling of the catalyst, purifies the waste gasified gases, and converts the tar into inflammable gases.

The invention relates to the technical field of environmental pollution abatement, in particular to an atmospheric pollution abatement purification tower which comprises a tower body, a first partition plate and a second partition plate are arranged in the tower body and are both parallel to the bottom face of the purification tower, and the second partition plate is located above the first partition plate; a motor is directly and fixedly installed on the first partition plate and the bottom face in the tower body, an air inlet mechanism is fixedly installed at the ends, away from the first partition plate, of the first rotating shaft and the second rotating shaft and located above the second partition plate, a purification mechanism is arranged on the portion, away from the air inlet mechanism, above the second partition plate, and an air outlet is formed in the upper end of the tower body. A filter plate is mounted at one end, away from the tower body, of the gas outlet. According to the invention, the inside of the reaction liquid is stirred by utilizing the contraction and deformation recovery process of the gas pipe, and compared with transmission stirring, the scheme does not generate vortexes during stirring, so that all gases have sufficient contact time with the reaction liquid, and the reaction is complete.

A gas generator is disclosed. Its features are high gasifying intensity (1600-1800 kg/sq.m.hr), broad spectrum of raw materials including soft coal, hard coal, coal gangue and combustible solid, and low cost.

The invention discloses a two-phase flowing biological bed based on composite oil removal bacteria. According to the two-phase flowing biological bed, fixed plates parallel to the bottom of an aerobicpool are arranged in the aerobic pool; the fixed plates are provided with gas holes for passing through of gas; the adjacent fixed plates are filled with aerobic filler blocks; an aeration device isarranged below the fixed plates; and the aerobic filler blocks are internally provided with a mixture of an active carrier, a composite oil removal bacterial agent and a nutrition agent thereof, wherein the active carrier is 20-40 parts of modified active carbon fiber, the composite oil removal bacterial agent comprises a plurality of bacteria selected from bacillus, yeast and micrococcus, and thenutrition agent is prepared from 2 to 6 parts of uric acid, 1 to 6 parts of phosphate, 8 to 16 parts of glucose, 0.4 to 1.2 parts of arachidonic acid, 0.3 to 0.9 part of sucrose polyester and 1 to 4parts of magnesium sulfate. According to the invention, the strain changes the hydrophobicity of the surface of the strain by releasing surface active substances on the surface of the strain, so thatthe strain is easily attached to the surfaces of hydrocarbon substances.

The invention discloses a chromium plating fog recovery and purification device, and belongs to the technical field of chromium plating waste gas recovery processing technology. The chromium plating fog recovery and purification device includes a chromium fog channel, the chromium fog channel is formed by a plurality of stages of recovery and purification chambers, the plurality of stages of recovery and purification chambers are connected in series in turn, and are communicated with a chromium plating bath and a fan for pumping air. Each recovery and purification chamber comprises a condensing chamber and a recovery water tank, the upper part of the condensing chamber is provided with a spraying device, the recovery water tank is located below the condensing chamber, and the recovery water tank is correspondingly communicated with the condensing chamber, and a next-stage recovery water tank supplies water for the spraying device of a front-stage recovery and purification chamber. The plurality of stages of recovery and purification chambers are used for physical interception of chromium fog in the chromium plating bath, and the whole recovery and purification process is free of wastewater discharge and physical maintenance.

The invention discloses a novel efficient plant deodorant and a preparation method thereof. The plant deodorant comprises the following components in parts by weight: 15-25 parts of zinc diricinoleate, 10-20 parts of plant essential oil, 1-4 parts of an antibacterial agent, 2-5 parts of a preservative, 8-15 parts of nano microspheres, 1-3 parts of an emulsifier and 70-80 parts of deionized water. According to the invention, the zinc diricinoleate and the plant essential oil have a synergistic effect, the deodorization effect of the plant deodorant is improved, activated zinc atoms in the zinc diricinoleate can form a very strong combination with nitrogen and sulfur atoms in odor, and therefore the odor is thoroughly eliminated. Meanwhile, the manganese oxide nanofiber microspheres are used as carriers to store formaldehyde and other odorous gases, so that zinc diricinoleate can act on the odorous gases to remove the odorous gases.