30results about How to "Control joining speed" patented technology

The invention discloses a chopped fiber feeder of the screw extruder which includes the hopper, the motor, the gearbox, the roller with the open slot and the fiber stirring device. The motor fixed on the supporting frame is connected to the gearbox which is connected to the roller by the axis. The roller located in the bottom of the hopper matches with the open slot. It can control the addition and the adding speed of the chopped fiber by controlling the speed of the roller and the roller or the hopper open slot. So it can protect the completeness of the chopped fiber.

The invention provides a method for preparing 3-(2-Chloroethyl)-2-methylpyrido[1,2-a]pyrimidin-4-one. The method uses 2-aminopyridine and 2-acetylbutyrolacton as raw materials and comprises steps of reactants preparation and separation and purification. The reactants are prepared by the following steps of: placing the 2-aminopyridine and the 2-acetylbutyrolacton into toluene, mixing and stirring the mixture to obtain a reactant liquid, heating the reactant liquid, diluting phosphorus oxychloride with the toluene in advance, dripping the diluted phosphorus oxychloride into the liquid, keeping the temperature at 110 DEG C, carrying out reflux, and obtaining the reactants. The invention can well control the dripping speed of the phosphorus oxychloride, thereby solving the problems of multiple solvents and complex operation caused by ammonia, methylene dichloride, isopropanol, etc. in the following operation, simplifying the process of separation and purification, improving the product yield, and achieving the pure product rate of more than 70 percent.

The invention relates to equipment for treating H-acid production wastewater. The equipment comprises a neutralization pot, an elevated tank, an evaporation pot, a crystallization tank and a centrifuge which are connected in sequence, wherein a material transferring pump for adding roughly treated feed liquid into the elevated tank is arranged between the neutralization pot and the elevated tank. A new road is opened, water is evaporated in a distillation mode by skillfully utilizing the characteristic that organic matters and the water in the wastewater have different boiling points, the organic matters and inorganic salts are separated, sticky colloidal organic matters and solid inorganic salts are separated in a centrifuging mode, the organic matters are combusted or further separated, the solid inorganic salts containing a large amount of ammonium sulfate can be directly used as a fertilizer, and waste is turned into wealth, so that the long-term technical problem that H-acid waste liquid is difficult to treat is solved.

The invention discloses a method for short process preparation of superfine platinum powder. Specifically, a certain amount of ammonium chloroplatinate solid is weighed, deionized water is added, andthe specific value of the volume of the deionized water to the mass of the ammonium chloroplatinate solid is (10-20):1 (ml/g); aqueous alkali is used for adjusting the aqueous phase pH to be 4-8; a hydrazine hydrate solution with the mass fraction being 40% is weighed, attenuation is carried out to enable the mass fraction to be 20%, and the solution obtained after attenuation is used as a reducing agent for standby application, and the using amount of the hydrazine hydrate is 2-4 times the theoretical using amount of reducing platinum; heating is carried out, and the system temperance is maintained to be 40-50 DEG C; under the stirring condition, a reducing agent is dropwise added into a platinum containing water phase slowly, the aqueous alkali is used for adjusting the aqueous phase pHin the phase, and the pH value is maintained to be 4-8; after the reducing agent is completely added, stirring is carried out for 0.5-1 h; and the superfine platinum powder is obtained after filtering, washing and drying. According to the method, a solid phase reduction method is adopted, the ammonium chloroplatinate solid is restored directly, meanwhile, the superfine platinum powder with the small prepared size can be prepared under the condition that a dispersing agent is not added, the technology is simple, and the flow is short.

The invention discloses a low-cost calcium treatment method of ultralow-carbon high-aluminum steel. The technical problems of high cost, molten steel splashing and molten steel nitrogen increasing ofthe calcium treatment conducting on the ultralow-carbon high-aluminum steel by an RH furnace in the prior art are solved. According to the technical scheme, the low-cost calcium treatment method for the ultralow-carbon high-aluminum steel comprises the following steps that decarbonizing is conducted on molten steel; deoxidizing is conducted the decarburized molten steel by adopting silicon; controlling a molten steel treatment mode of the RH furnace to be switched into a light treatment mode; conducting the calcium treatment on the molten steel; introducing argon into a RH furnace circulationpipe before the RH furnace finishes the next-furnace molten steel treatment, circulating the argon in the RH furnace circulation pipe, and the argon circulating flow rate is 500-2400 L/min. Accordingto the method, the cost for conducting the calcium treatment on the ultralow-carbon high-aluminum steel in the RH furnace is reduced, and the production cost of the ultralow-carbon high-aluminum steelis reduced.

The invention relates to a preparation method of 4,6-dihydroxy-5-methoxypyrimidine sodium. The preparation method comprises following steps: (a) sodium methylate is delivered into a dried container, is stirred and heated to 65 to 68 DEG C, methanamide is added, 2-methoxypropandioic acid ethyl methyl ester is added dropwise, and reaction is carried out at a temperature of 65 to 70 DEG C for 2 to 6h so as to obtain a mixture; and (b) the mixture is subjected to distillation at 25 to 80 DEG C so as to remove methanol, is cooled to 10 to 15 DEG C, and is centrifuged so as to collect a solid material. According to the preparation method of 4,6-dihydroxy-5-methoxypyrimidine sodium, sodium methylate and methanamide are delivered into the dried container, and 2-methoxypropandioic acid ethyl methyl ester is added dropwise, so that on the one hand, damage on reaction caused by residual water in the container is prevented, and on the other hand, the drop-by-drop adding manner is beneficial for controlling of adding speed of 2-methoxypropandioic acid ethyl methyl ester, the reaction temperature can be controlled more accurately, side reaction is inhibited, and yield of needed products is increased.

The invention discloses a stirring process for the water-free taphole clay production process. The stirring process has the advantages that efficiency is high, bonding agents can fully wet aggregates and powder, the uniformity is good, and the stability is high. The stirring process comprises the steps of (1) conducting dry-blending, wherein various kinds of aggregates and powder weighed according to a formula are placed into a mixer for stirring, the stirring speed of a rotor ranges from 72 r/m to 108 r/m, and the stirring time ranges from 60 s to 120 s, (2) adding the bonding agents, wherein the bonding agents weighed according to the formula are placed into the mixer, the adding speed of the bonding agents ranges from 1.2 Kg/s to 2.2 Kg/s, and the stirring speed of the rotor ranges from 72 r/m to 108 r/m, and (3) conducting wet-blending. The stirring process can be widely applied to the water-free taphole clay production field.

The invention provides a mixing system favorable for improving the cattle and sheep culture feed mixing degree. The mixing system comprises a frame body, wherein feeding hoppers are arranged at the upper side of the frame body; the two feeding hoppers are connected through a Y-shaped pipe; a first platform is arranged in the frame body; a first conveying belt is arranged on the first platform; a second platform is arranged at one side of the first platform; a second conveying belt is arranged on the second platform; a third platform is arranged at one side of the second platform; a third conveying belt is arranged on the third platform; a dispersion device is arranged on the first platform and the second platform and comprises a dispersion box; a transverse rod is arranged in the dispersion box; the transverse rod is provided with a rotating motor; a cover body is arranged outside the rotating motor; a tree-shaped body is arranged on the rotating body and comprises a rod body; a dispersion rod body is arranged on the rod body. Through the arrangement of platforms with different heights to be matched with the conveying belts, different ingredients can be added according to the sequence; the sufficient mixing on each ingredient of the compound feed is realized; according to the arrangement of the platforms with different heights, the uniformity of the feed can be further improvedby using the height difference between the platforms.

The invention relates to the technical field of organic synthesis preparation, in particular to a preparation method of 2-acrylamido-2-methylpropanesulfonic acid, which can improve the purity of the 2-acrylamido-2-methylpropanesulfonic acid finished product, reduce the impurity content, avoid the influence on the molecular weight in the subsequent polymer preparation process, and reduce influenceon the use effect of 2-acrylamido-2-methylpropanesulfonic acid; the method comprises the following steps: S1, preparing a sulfuric acid mixed solution; S2, performing cooling treatment; S3, firstly introducing acrylonitrile into a reaction kettle, then introducing a sulfuric acid mixed solution into the reaction kettle, and finally gradually introducing isobutene into the reaction kettle to carryout a mixed reaction, wherein a sulfuric acid mixed solution is firstly introduced, then acrylonitrile is introduced and isobutene is finally introduced, and continuously carrying out a stirring reaction for 1-2 hours after the addition of the materials is completed, wherein the reaction process needs to be carried out in a helium atmosphere; S4, filtering and separating; S5, preparing a solution;S6, carrying out recrystallization treatment; and S7, performing drying treatment.

The invention relates to the technical field of pigment production, and particularly discloses a preparation method of an azo pigment, which comprises: mixing 100-120 parts by weight of 2B acid, 32-50 parts by weight of ammonia water with a weight percentage of 20-25%, and 1300-1500 parts by weight of water, adding 120-150 parts by weight of hydrochloric acid with a weight percentage of 30-40% after the 2B acid is dissolved, uniformly mixing, adding ice cubes to a temperature of 0-10 DEG C, then adding 100-130 parts by weight of a sodium nitrite aqueous solution with the weight percentage of 30-35% to obtain a diazonium solution; mixing 85-100 parts by weight of 2, 3-acid, 110-150 parts by weight of sodium hydroxide with the weight percentage of 20-30% and 1400-1800 parts by weight of water, adding 6-10 parts by weight of a stabilizer, and uniformly mixing to obtain a coupling solution; mixing the diazo liquid and the coupling liquid, controlling the pH value at the end point of the reaction to be 8-10, then adding 200-250 parts by weight of a calcium chloride aqueous solution, and then carrying out filter pressing, rinsing, drying, inspecting and packaging to obtain the azo pigment; wherein the stabilizer comprises at least one of palm wax and paraffin; and the azo pigment provided by the invention has the advantage of good thermal stability.

The invention belongs to the technical field of chemical experimental instruments, and particularly relates to a Kipp's generator. The Kipp's generator comprises a reaction vessel provided with an opening and a gas guide pipe communicated with the reaction vessel, wherein a rotary piston is arranged on the gas guide pipe; the Kipp's generator further comprises a separating funnel; the opening end of the reaction vessel is covered with a rubber stopper; the bottom end of the separating funnel penetrates through the rubber stopper and extends into the reaction vessel; a solid accommodating bottle is arranged in the reaction vessel, a plurality of through holes are formed in the bottom and the side part of the solid accommodating bottle, and the solid accommodating bottle is communicated with a feeding pipe; the top end of the feeding pipe penetrates through the rubber stopper and extends out of the reaction vessel; and the top end of the feeding pipe is covered with a rubber plug, the part, extending out of the reaction vessel, of the feeding pipe is enclosed, and a pressure meter is arranged at the part. The Kipp's generator is simple in structure, lower in preparation cost and capable of accurately observing conditions of pressure inside the reaction vessel, so that the pressure inside the reaction vessel can be well controlled, the reaction can be performed smoothly, and safety of an operator is guaranteed.

The invention discloses a device and a process for preparing a graphene heat transfer enhanced organic silicon resin composite pipe. An outer layer of the composite pipe is a metal pipe, and an innerlayer of the composite pipe is organic silicon resin with graphene added. According to the process principle, the metal pipe which rotates at a high speed and can move axially, a resin conveying pipeand a nozzle which are relatively static are arranged in the metal pipe through a bearing and a steel wire brush, the resin conveying pipe and the nozzle do not participate in rotation and axial movement of the metal pipe, organic silicon resin with graphene added is sprayed to the inner surface of the metal pipe out of the nozzle through a resin pump and a resin conveying pipe, the sprayed metalpipe gradually enters a heat curing device to be heated and primarily cured, a delay controller and a stroke controller are in linkage with a motor to stop rotation of the metal pipe after the resin loses liquidity, the metal pipe is enabled to enter other sections of a curing area, and curing is continued to form the composite pipe.

The invention relates to a full-automatic ion exchange resin pretreatment device for a laboratory. The full-automatic ion exchange resin pretreatment device comprises liquid bottles, a peristaltic pump, an exchange column, a control system, a waste liquid bottle and a waste liquid pump, wherein the peristaltic pump is a multi-channel peristaltic metering pump; a plurality of the liquid bottles are arranged for containing liquids with different concentrations or different types; the number of the liquid bottles is equal to the number of channels of the peristaltic pump; the channels of the peristaltic pump are connected with the liquid bottles through pipes, and the liquid bottles connected with the channels of the peristaltic pump are different; the control system is in communication connection with the peristaltic pump and is used for controlling multi-channel switching of the peristaltic pump so as to extract the liquids with different concentrations or different types; and one end of the exchange column is connected with the peristaltic pump, the other end of the exchange column is connected with the waste liquid pump, and the waste liquid pump is connected with the waste liquid bottle. According to the invention, program control is used, different flow speeds and flows can be set for liquid, the purpose of optimizing experiment steps is achieved, and a new experiment scheme is provided.

The invention relates to the field of industrial wastewater recycling, in particular to a method for producing barium carbonate with barium hydroxide production wastewater. The method comprises the following steps of: pumping the wastewater generated during barium hydroxide production into a stirring kettle, adding 98% sodium bicarbonate during stirring, after wastewater clarification, stopping stirring, settling for 30min, injecting into a press filter for press filtration at the pressure of 8-10 atmospheres, after the press filtration, cleaning dregs of the press filter, and obtaining barium carbonate. The method has the benefits that: according to the method, an appropriate amount of sodium bicarbonate is added, and the adding velocity and settling time are controlled, so that the final purity of barium carbonate in a technology can reach above 90%, and the recovery rate of barium ions in the wastewater reaches above 95%.

The invention discloses a stirring device for a white spirit distiller's yeast manufacturing process. The detachable cover body is arranged at an opening in the top end of the stirring barrel body; the bottom plate is arranged at the bottom of the inner side of the stirring barrel body and is obliquely arranged; the discharging structure is arranged on the stirring barrel body and is close to the downwards inclined end of the bottom plate; one end of the stirring structure is arranged on the cover body, and the other end of the stirring structure penetrates through the cover body and is arranged in the stirring barrel body; the raw material inlet is formed in the cover body and penetrates through the cover body, the auxiliary material feeding structure is arranged on the cover body and penetrates through the cover body, the controller is arranged on the cover body and is electrically connected with the auxiliary material feeding structure, and connecting lugs are arranged on the two sides of the upper end of the cover body; according to the present invention, the structure has characteristics of convenient operation and strong practicality, can well mix the raw material, the bacterial koji liquid and the treatment liquid, and can effectively control the using amount and the adding speed of the bacterial koji liquid and the treatment liquid so as to ensure the mixing uniformity and the mixing quality.