369results about How to "Continuous and stable production" patented technology

The invention provides a device and a method for continuously synthesizing amine-terminated polyether by utilizing a fixed bed. The device for continuously synthesizing amine-terminated polyether by utilizing the fixed bed comprises a fixed bed reactor, a preheater, two gas-liquid separators, a compressor, a circulating compressor, a raw material pump, a liquid ammonia pump and two buffer tanks, hydrogen is preheated by virtue of the preheater and is fed into the fixed bed reactor with raw material and liquid ammonia; the amine-terminated polyether is synthesized in a hydrogen atmosphere of the fixed bed; the fixed bed reactor is at the temperature of 150-300 DEG C and the pressure of 1-20MPa, ammonia alcohol ratio is 1-15, and unreacted hydrogen and ammonia are recycled. The device and method for continuously synthesizing amine-terminated polyether by utilizing the fixed bed overcome the defects of tedious operation, unstable product quality, low synthesis efficiency and the like of the existing technology as a batch-type operation is adopted, a continuous reaction technological design is adopted, a technology is simple, performance is stable, yield is high, excessive ammonia and hydrogen are recycled, pollution to the environment is reduced, production cost is reduced, and energy is saved; conversion rate of hydroxyl-terminated polyether or derivative thereof and selectivity of the amine-terminated polyether product are obviously improved, so that production cost of the amine-terminated polyether product is obviously reduced.

The invention discloses a rotor type pressure swing adsorption gas separation device, wherein a rotor is arranged in a shell; an adsorption region and a desorption region are divided according to formed different pressures; the rotor comprises a disc with a plurality of empty grids which is formed by a plurality of partition plates; the empty grids are filled with an adsorbent and are sealed by using porous plates or nets at the two ends in the axial direction; during work, the rotor rotates, an adsorbent is driven to continuously move and circulate at the adsorption region and the desorption region; feed gas and/or flushing gas regionally pass (passes) through the adsorbent layer in direction crossed with the adsorbent movement direction, so that the feed gas is continuously separated and purified at the adsorption region; and saturated adsorbent is continuously decompressed or/and flushed and regenerated at the desorption region, so that product gas is continuously and stably produced. The rotor type pressure swing adsorption gas separation device has the advantages of overcoming the defect of frequent switching of an adsorption tower existing in the conventional pressure swing adsorption gas separation device, low energy consumption, high yield, easiness in running and operation, small land occupation and small using amount of the adsorbent, is extremely suitable for the fields of oxygen enriched combustion, oxygen enriched and pure oxygen application of industrial kilns and can also be used for separation and purification industries of other gases.

The invention discloses an external heating type biomass pyrolysis gasification furnace and a method for preparing charcoal by continuous pyrolysis gasification. The pyrolysis gasification furnace is composed of a silo, a combustion chamber, a trough and a carbonized material cooling section. There is a silo on the trough, a carbonized material cooling section under the trough, and a carbonized material outlet in the carbonized material cooling section. , there is a biomass raw material inlet on the silo, an air inlet and an exhaust gas outlet on the combustion chamber, and three independent annular combustion chambers are arranged on the outer periphery of the trough from top to bottom. An air inlet and an exhaust gas outlet are respectively provided, and a gas overflow pipe is provided on the inner wall, and the gas overflow pipe communicates with the trough. The pyrolysis and dry distillation gas enters three independent annular combustion chambers respectively through the overflow pipe, and undergoes combustion reaction with air, and the heat energy generated is used to maintain the pyrolysis temperature of the biomass material layer. Using the heat energy provided by it, the biomass in the furnace is pyrolyzed and dry-distilled to decompose the dry distillation gas to obtain charcoal. The charcoal has high yield, good quality, and the device occupies less land.

The invention discloses a miniature movable type agricultural and forest biomass fast pyrolysis device. The device comprises a traveling mechanism (25), a combustion furnace (18), a feeder (21), a fast pyrolysis reactor (22), a gas solid separator (23), a gas condenser (11), a non-condensable gas purifier (24), a fan (16), a gas buffer tank (17) and a gas preheater (19); the height of the fast pyrolysis reactor (22) can be adjusted, the device can be suitable for various agricultural and forest biomass raw materials, and the fluidization quality in the reactor is better due to the arrangementof an inverted-cone-shaped gas flow stabilizer in a top cover of the reactor; the non-condensable gas is taken as gas sources of spouting gas and fluidized gas and heat supply fuel, the entire deviceis simple in structure, small in volume and stable in running, can be hauled to the agricultural and forest biomass for production intensively and has lower production cost; the small-scale movable type operating mode also avoids the problem that the industrial enlargement of a fluid bed reactor is not easy; and the industrial production of agricultural and forest biomass fast pyrolysis is realized in a disguised form.

The invention discloses a flexible automatic welding system for a tower foot of a communication tower and a control method thereof, and relates to the technical field of equipment manufacturing. The flexible automatic welding system for the tower foot of the communication tower comprises a plate taking robot, a positioning table, a positioner, a welding robot and an electrical control system; theplate taking robot comprises a ground rail mechanism, a vertical beam mechanism, a cross beam mechanism and a material taking mechanism; the positioner comprises a turning shaft, a rotating shaft, a rotating platform and a positioning device; and the electrical control system comprises an industrial personal computer, a PLC master station, a PLC slave station, a servo amplifier and a welding robotcontrol panel. The plate taking robot sequentially conveys tower foot plates placed on the positioning table to a tower foot bottom plate fixed on the rotating platform according to the assembly sequence of the tower foot, and the positioner is in linkage with the welding robot to carry out spot welding and then carry out full welding. According to the system, automatic assembling and welding ofthe tower feet with multiple types and different inclination angles can be realized, the labor amount of workers is reduced, and the welding quality and efficiency are improved.

The invention relates to a production apparatus and an extrusion technology of a novel clad pipe. The production apparatus comprises an extrusion production line apparatus for production of an inner layer and an external layer of an enhanced clad pipe, winders for winding and preheating a long fiber strip, a center locating frame for controlling a fibrous strip winding to cause tilt of an inner pipe, and a heating box for heating the inner pipe wound with the fibrous strip. According to the invention, two winders are configured between an inner pipe extrusion line and an external layer extrusion cladding die head and used alternately; when a fibrous strip on one winder is using up, the other winder is initiated rapidly to ensure continuous and stabilized production of the enhanced clad pipe. In the invention, a winding packaging technology is upgraded and reconstructed to combine with a cladding double-layer extrusion technology. A foreign complex technology requiring a special windercan be substituted to raise operation convenience, promote generalization of the technology and fill domestic technical blank of continuous fiber winding enhanced clad pipe. Therefore, the technologyof the invention is suitable for industrialized popularization.

A method of making a standing gather-forming member having a basal wall and first and second overhangs on both sides of the basal wall. Elastic members are disposed in their stretched state on the inner surface of a middle portion of a continuously running strip-shaped sheet. One of side portions extending on both longitudinal sides of the middle portion is Z-folded to cover a part of the width of the middle portion thereby to form the first overhang. The other side portion is then folded inward along the longitudinal direction to cover the part of the middle portion that remains uncovered with the first-mentioned side portion and to overlay the Z-folded portion of the first-mentioned side portion thereby to form the second overhang and the basal wall.

The invention discloses a method for separating carbonate from carbonate bittern containing lithium and potassium to prepare sylvinite ore and lithium carbonate concentrate, wherein the carbonate bittern containing lithium and potassium is pre-concentrated, the carbonate is separated from the carbonate bittern containing lithium and potassium by means of combination of frozen alkaline and a precipitant so as to prepare the concentrated bittern with the content of carbonate reduced, then the concentrated bittern is further concentrated, the sylvinite ore separated out by evaporative crystallization is separately collected and prepared after the content of the potassium ion in the bittern is up to 51.70g/L, the lithium enrichment bittern with the content of the lithium ion being 4-26g/L is prepared, and the lithium enrichment bittern is guided into a crystallizer, added with sodium carbonate, and separated in a centrifugal way to obtain the lithium carbonate concentrate. Compared with the prior art, the method provided by the invention has the following advantages: the lithium enrichment concentration is increased because the carbonate in the bittern is removed; the purity of the obtained lithium carbonate and the overall recovery of the lithium ion are high; continuous industrialization and automated production of the preparation of the lithium carbonate concentrate can be implemented; high-grade sylvinite can be prepared from a salt pan, and the potassium ion recovery of the salt pan is increased; and the residual bittern of which the lithium is extracted can be comprehensively developed conveniently so as to further extract substances like boron, rubidium, cesium bromine.

The invention relates to a method for producing calcium ammonium nitrate. The method comprises the following steps: carrying out a reaction on nitric acid and calcium carbonate slag to generate calcium carbonate, water and carbon dioxide, and feeding into a filter press to filter acid non-soluble substances and particle impurities; after mixing the generated calcium carbonate liquor and calcium carbonate liquor in a certain proportion, carrying out intermediate-pressure steam distillation and concentration; and pelleting by using a disc pelleting machine, and then, cooling, screening and packaging to obtain finished-product calcium ammonium nitrate. The invention further relates to a device for producing calcium ammonium nitrate by production waste calcium carbonate slag of nitric phosphate. The device is additionally provided with a settling tank for preventing slag from entering into the system. By adopting a disc pelleting technology, continuous and stable production of excellent calcium ammonium nitrate is realized, and problems that a conventional pelleting technology is easy to agglomerate and block, and the finished product is less in particle quantity and the like are solved.

The invention discloses a forming mold and method for an ultra-fine grain hollow magnesium alloy profile. The forming mold comprises a base, a concave die outer sleeve, a concave die inner sleeve, an extruding needle, an extruding shaft and an extruding pad, wherein the concave die inner sleeve is provided with a forming concave die. The forming method the following steps: (1) fixedly connecting the extruding pin and the extruding shaft with an inner sliding block and an outer sliding block of a double-acting extruding machine; (2) heating an ultra-fine grain hollow cylinder blank above a re-crystallization temperature; (3) putting the heated blank into a feeding section of the forming concave die; (4) starting the double-acting extruding machine to position the extruding needle, and pushing the extruding shaft and the extruding pad through the outer sliding block to extrude the blank; and (5) finally forming a tubular product by virtue of the extrusion of the outer sliding block of the extruding machine. According to the forming mold and method, the continuous plasticity of the magnesium alloy tubular product in the machining process can be effectively improved, the mechanical property can be enhanced, and the large-batch production machining can be realized.

The invention discloses a reactor and a method for producing particle materials. The reactor comprises a reactor cavity which is at least provided with a particle feeding hopper, a raw gas inlet, a particle product discharging port and a tail gas outlet, wherein the reactor cavity is internally provided with at least one conical distributor; the position of the tail gas outlet is higher than that of the conical distributor; the particle feeding hopper is arranged at the upper part of the reactor cavity; the particle product discharging port is arranged at the lower part of the reactor cavity; the reactor cavity also comprises an air curtain mechanism which can realize the blocking action between the reaction material and the inner wall of the reactor cavity; the reactor cavity is also provided with an internal or external mechanism for heating a reaction area; and the reactor cavity is also provided with an internal or external dynamic generation mechanism. The invention also discloses the method for producing the particle materials. According to the invention, the defects in the prior art are overcome, and the high-efficiency, energy-saving, long-term stable, safe and reliable production of the particle materials is realized.

The continuous reaction and coextrusion process of preparing stepped plastic fiber includes purifying monomer, compounding polymer solution, heating or microwave prepolymerization, extrusion with one continuous reaction extruder, exhausting and recovering unreaced monomer and oligomer, forming transparent polymer melt or cooling and cutting into grains; extruding transparent polymer core and transparent coating with two continuous reaction extruders; and fusing and combining in a coextruding mold, drawing, tensing and cooling to form the stepped plastic fiber.

The invention discloses a low-temperature denitration and desulfurization device for coking furnace flue gas and a process and belongs to the technical field of pollutant treatment of flue gas of a coking furnace in the coking industry. The device mainly comprises a denitration reactor, a reheater, an induced draft fan, a desulfurizing tower, a desulfurization absorption liquid heat exchanger, an ammonium sulfate mother liquor tank, an ammonium sulfate mother liquor circulating pump, a desulfurizing liquid circulating pump and a desulfurizing liquid metering and conveying pump. The coking furnace flue gas is denitrated by the denitration reactor, heat exchange of high and low temperature coking furnace gas is performed by the aid of the reheater, desulfurization is performed by the aid of a desulfurization absorption, and finally, low-temperature denitration and desulfurization purification treatment of the coking furnace flue gas is completed. The low-temperature denitration and desulfurization device has the advantages as follows: resources of a coking plant are sufficiently utilized, the idea of treating waste with waste is realized, and continuous and stable production of the coking furnace is guaranteed while the working condition of the coking furnace flue gas and the denitration and desulfurization requirements are met through a pilot plant test and an industrialized application test.

The invention relates to a method for preparing lithium chloride concentrate by using eluent of adsorptive lithium extraction as raw material; adsorptive lithium extraction eluent having magnesium-lithium ratio of 0.5-10 and lithium content of 150-2500 mg/L is used as a raw liquid, the raw liquid is subjected to reverse osmosis, pre-concentration is then carried out to obtain lithium content of 1700-7000 mg/L, reverse osmosis concentrate is used as electrodialysis desalination stock liquid, the stock liquid is treated with a monovalent ion selective exchange membrane to obtain lithium chloride concentrate having lithium content of 14 g/L and magnesium-lithium ratio of 0.1-1 and suitable for high-purity lithium salts, such as lithium carbonate and lithium chloride; reverse osmosis fresh water is reclaimed for cyclic use in the desorption step of adsorptive lithium extraction; electrodialysis desalination produced water is returned for cyclic use in the adsorbing step, and therefore concentrative enrichment of lithium in eluent and full reclaiming of water are achieved. The method is simple to perform, has a continuous process and is low in investment and low in cost, and the bottleneck problem with magnesium removal and concentration of salt lake adsorptive lithium extraction eluent with high magnesium-lithium ratio is basically solved.