52results about How to "Reduce stuck problems" patented technology

The invention discloses a preparation method of D-mannose, which comprises the following steps that glucose is epimerized under a normal pressure or pressurized condition by using ammonium molybdate as catalyst to obtain mixed solution of glucose and mannose; the mixed solution is discolored, desalted and refined and then enters a simulated moving bed 1 for separation and purification to obtain a component A rich in mannose and a component B rich in glucose; the component A enters a simulated moving bed 2 for separation to obtain a component C rich in mannose and a component D rich in glucose; the component B is filtered through a membrane and then enters the step of epimerization; the component D is filtered through a membrane and then enters the simulated moving bed 1 for cyclic separation; and the component C is centrifugally spray-dried to obtain D-mannose finished products. The preparation method of the D-mannose has the advantages of simple steps and easiness in operation. The purity of the D-mannose finished products prepared by adopting the method reaches more than 99 percent and the total yield reaches 53-60.4 percent.

The invention discloses a high-strength antifriction lead-free copper-based sliding bearing material. A ball milling process is adopted to enable copper powder, iron powder and copper sulphide powderto be mechanically alloyed, and CuS and Fe mixed powder can generate superfine particle nanocrystalline FeS in a high-energy guide-in manner through a mechanically induced chemical reaction. The reaction in situ composite process is used for solving the problems that enhanced particles are added externally, air suction and wettability are poor, and the interface combination is poor; meanwhile, through the ball milling process, the phenomenon that when ferrous sulfide is directly added, agglomeration is easily caused is avoided; in the ball milling process, the other part of Fe atoms is added into copper atoms in a solid solution manner so as to achieve the solid solution reinforcing effect, and the copper base composite is reinforced. The antifriction and anti-sticking capacity of FeS is mainly used for replacing lead in the original copper base bearing material, lead pollution is avoided, meanwhile, through Fe solid solution, the copper-based sliding bearing material is reinforced, and effective unifying of high strength and good lubricating characteristics of the lead-free copper-based sliding bearing material is achieved.

The invention relates to drying process and equipment of powder urea resin, which mainly pumps urea-formaldehyde resin emulsion into an atomizer (2) by a pump (1). The urea-formaldehyde resin emulsion is sprayed into droplet by compressed air in a nozzle of a sprayer and enters a dryer (3) together with the compressed air. After being dried, the powder urea resin enters a cyclone separator (5) and waste gas is exhausted by an induced draft fan after filtered by a bag filter (6). The invention is characterized in that: the dryer (3) is provided with interlayer on the external wall; the waste gas hot air exhausted from the exit of the induced draft fan (7) is led into a primary air preheater (9) provided with an input port for cold air; the cold air enters the interlayer of the dryer after preheated and ascends along the dryer interlayer duct in a spiral; the air exhausted from the dryer interlayer is led into an air heater (8). The adoption of the drying process and equipment of powder urea resin can effectively recover energy by grades and has the characteristics of saving energy and reducing sticking on the wall.

The invention provides a filter used for producing a nano-coating. The filter comprises a filter body and a filter cover, the filter body includes a main shaft, a filtering module and a filter screen, the filtering module is concentrically and detachably arranged in the filter body, the cooperating filter screen is arranged in the filtering module, the filter screen is uniformly provided with a plurality of through holes, and a feeding opening communicating with the inner chamber of the filter body is arranged at the upper end of the filter cover; and a discharging opening and an electric heating tube communicating with the interlayer of the filter body are arranged at the lower end of the filter body. The nano-material rapidly moves under the driving of helical blades, and is filtered by the filter screen, and a wall scraping device drives a scraper to rotate in order to momentarily clean the material on the inner wall of the filter body, so adherence to the wall is reduced, and the filtering efficiency and the filtering quality are improved; and the heating tube is used to heat in order to make the coating keep a high temperature and not form large blocks, and then the heated material is filtered by the filter screen, so the filtering effect is effectively enhanced, and the obstruction phenomenon is less likely to occur.

The invention provides a filtering device for a coating. The filtering device comprises a filter body and a filter cover, wherein the filter body comprises a main shaft, filtering modules and filter screens; the filtering modules are concentrically arranged in the filter body; the interior of each filtering module is provided with a matching filter screen; each filtering screen is uniformly provided with a plurality of through holes; the upper end of the filter body is provided with a feeding inlet which is communicated with the inner chamber of the filter body; the feeding inlet is connected with a stirrer connecting pipe through a valve; and the lower end of the filter body is provided with a discharge outlet and an electric heating pipe which is communicated with the interlayer of the filter body. The filtering device provided by the invention rapidly moves under the driving of spiral blades and clean materials on the inner wall of the filter body at any time through filtering via the filter screens and rotation of scraper blades under the driving of a wall scraping unit, so the materials are substantially prevented from adhering to the wall and the efficiency and quality of filtering are improved; the filtering device is heated through the heating pipe, so the coating can be kept at a high temperature, and is not easy to form large caked blocks; and filtering is carried out in virtue of the filter screens, so filtering effect can be effectively improved, and blockage hardly occurs.

The invention discloses an antifriction lead-free copper-based sliding bearing material and a preparation method thereof. The ferrous sulfide powder, the bismuth powder and the bronze powder are subjected to mechanical alloying by adopting a ball milling technology to improve the interface adhesive strength of the ferrous sulfide, the bismuth and the bronze, and the phenomenon that the ferrous sulfide is easy to agglomerate when the content of copper matrix is relatively high is improved, the structure of FeS is good in oil storage capacity, the stability of the liquid-solid lubricating film is enabled to be good, so that the process of Bi spalling, the fusion of the low-melting-point component Bi and separating out of the low-melting-point component Bi are relieved, and the liquid-solid lubricating film can also be repaired and completed, so that the antifriction performance of the material is improved; in conclusion, the antifriction and wear-resistant properties of the copper-basedsliding bearing material are improved, the lead which is used as a lubricant in the copper-based bearing material is replaced by the good synergistic effect of the ferrous sulfide and the bismuth, sothat the pollution of lead is avoided; and the antifriction lead-free copper-based sliding bearing material and the preparation method thereof have the advantages of being low in cost and suitable forindustrial production.

The invention discloses a tracer method based particle concentration measurement system for a closed cyclic spray drying system. The tracer method based particle concentration measurement system comprises a laser source, aluminum powder colloid, an image acquisition device and a spray drying system. The laser source is positioned on one side of a drying chamber to illuminate fluid in the drying chamber. The image acquisition device is positioned on the other side of the drying chamber and opposite to the laser source and is used for recording the position of fluid tracer particle aluminum powder illuminated by the laser source. The tracer method based particle concentration measurement system is used for displaying particle concentration of raw material fluid in the drying chamber under atomization and rotating hot air action and can be used for research stimulation and structural optimization in a drying process.

The invention relates to a novel circulating fluidized bed flue gas desulfurization system and belongs to the technical field of semidry-method flue gas desulfurization. According to the technical scheme, the novel circulating fluidized bed flue gas desulfurization system comprises a desulfurization absorption tower, a dust collector, a dust hopper and a dust storage, wherein the a slag-preventing cone is arranged between every two adjacent Venturi nozzles in the nozzle section of the desulfurization absorption tower, a slag-preventing cone is arranged at the upper end of a gap between each Venturi nozzle and the inner wall of the nozzle section, and a fluidizing air system is mounted on the dust hopper and comprises a pressure measuring device for measuring fluidizing air pressure. The novel circulating fluidized bed flue gas desulfurization system which is mainly applicable to flue gas deep purification of industry such as electric power industry, petrochemical industry and smelting industry has the advantages that wall sticking and blocking cannot occur easily in the desulfurization absorption tower, and the system is good in material level measuring reliability and high in accuracy.

The invention discloses a self-locating high-sealing large-flow three-way valve. The three-way valve comprises a shell, wherein the shell comprises a water inlet channel, a first water outlet channel,a second water outlet channel and a valve cavity, the first water outlet channel and the second water outlet channel communicates with the water inlet channel in a switching mode, a valve element ismounted in the valve cavity and comprises a motor base and a three-way framework, the shell, the motor base and the three-way framework are made of plastic materials, the lower end of the motor base extends downwards to form a motor base clamping head, a three-way framework clamping groove allowing the motor base clamping head to be mounted from the side face is formed in the upper end of the three-way framework, the motor base and the three-way framework are connected by inserting the motor base clamping head into the three-way framework clamping groove in a matched mode, and the motor base is connected with the shell through clamping screws. According to the three-way valve, self-locating during mounting can be conveniently realized through the motor base and the three-way framework.

The invention discloses a powdery shrinkage-reducing type polycarboxylic acid water reducing agent and a preparation method thereof. The powdery shrinkage-reducing type polycarboxylic acid water reducing agent is prepared by introducing a hydrophobically modified polyether chain, a rigid group and ester bond bridged small molecular alcohol into a grafted copolymer to prepare a shrinkage-reducing type polycarboxylic acid water reducing agent mother solution, and then introducing a calcium-magnesium expanding agent as a separant to spray-dry the mother solution. The prepared powder is low in mixing amount, good in dispersing performance and excellent in shrinkage reducing effect, unification of water reducing and shrinkage reducing is achieved, and the powder is good in flowability, free ofcaking, good in storage stability and suitable for various dry-mixed mortars.

The invention discloses a method and a mobile terminal for information processing. The mobile terminal comprises a first hardware system and a first operating system installed based on the first hardware system, wherein the mobile terminal is internally provided with bus interfaces; when the first operating system in the mobile terminal needs to process a first calculating task, it is detected whether the mobile terminal is connected with N hardware resources through the bus interfaces, wherein each hardware resource in the N hardware resources at least corresponds to one function, and N is an integer being not less than 1; when the mobile terminal is connected with the N hardware resources through the bus interfaces, the first calculating task is processed through the first operating system at least based on one hardware resource in the N hardware resources.

The invention relates to a drying device which comprises a drying cavity, a gas jet plate, an intake tube and vibrators. The drying cavity is of a cylindrical structure, the upper end of the drying cavity is inclined by the preset angle and is provided with the gas jet plate connected with the intake tube, the gas jet plate is provided with a plurality of air guiding pipes capable of jetting dry gas into the drying cavity so as to blow off attachment on the inner wall of the drying cavity. The outer side wall of the drying cavity is provided with a plurality of vibrators connected with a motor to peel off the attachment on the inner side wall of the drying cavity. Due to the arrangement of the vibrators, materials can be prevented from being gathered on the inner wall of the drying cavity. Meanwhile, the air guiding pipes of the gas jet plate guide wind in the direction of the inner wall of the drying cavity, materials attached to the wall are reduced, a small number of materials attached to the wall can be brought away, and the phenomenon that materials are attached to the wall of the tower for a long time is avoided.

The invention discloses a wide-body controllable feed device and a feed method thereof, and belongs to the field of material feed equipment, which aims to solve the problems of poor feed capability and the like of an existing feed device. The wide-body controllable feed device comprises a feed channel, a discharge channel, an outer barrel and a rotor assembly, wherein the rotor assembly comprisesa rotating shaft, pushing blades and a plurality of spacing boards, a plurality of pushing blades which are uniformly arranged at intervals in the circumferential direction of the rotating shaft are arranged between two adjacent spacing boards, one side, which is close to the rotating shaft, of the pushing blades is fixedly connected with the rotating shaft, and both sides, which are close to thespacing boards, of the pushing blades are fixedly connected with the adjacent spacing boards. According to the wide-body controllable feed device and the feed method, the integral controllability andstability of the conveying flow are increased, and the phenomenon of material blockage of a rotary blade type forced feed device is solved.

The invention discloses a planetary vibration ball mill, and belongs to the field of ball mills. The planetary vibration ball mill comprises a base with the upper end open. A main motor is arranged inthe base. An output shaft of the main motor is connected with a rotating shaft at the lower end of a rotating disc. A driving gear on the rotating shaft is engaged with a planetary gear on a planetary shaft. The upper end of the planetary shaft penetrates through the rotating disc to be connected with a milling tank base. A ball milling tank is placed in the milling tank base. A support is arranged at the lower end of the main motor. An auxiliary motor is arranged in the base and located below the support. An output shaft of the auxiliary motor is connected with a driving shaft. The driving shaft is arranged in a non-horizontal mode and used for driving one side of the support to ascend and descend vertically. According to the planetary vibration ball mill, the phenomena of wall sticking,agglomeration and the like of samples during the working of the planetary ball mill can be reduced.

An omnibearing vibration ultrasonic ball mill with high efficiency is composed of a rack, a motor, a synchronous belt wheel, a synchronous belt, an eccentric main shaft, a bearing, an eccentric wheelframe, a ball-milling tank, a ball-milling tank connecting shaft, a gas conveying pipe, an ultrasonic generator, a gas pressure sensor, a temperature sensor and an operation and control device system.One end of the eccentric wheel frame is connected with the eccentric main shaft through the bearing, and the other end of the eccentric wheel frame is connected with the ball-milling tank connectingshaft through a hinge, so that the eccentric wheel frame drives the ball-milling tank connecting shaft to swing back and forth around a fulcrum under the driving of the eccentric main shaft. The ball-milling tank connecting shaft is of a two-section structure, the section, connected with the eccentric wheel frame, of the ball-milling tank connecting shaft is a solid rod piece, the section, connected with the ball-milling tank, of the ball-milling tank connecting shaft is a hollow rod piece with high elasticity, and all connecting wires between the sensors and the operation and control device system and between the ultrasonic generator and the operation and control device system and the gas conveying pipe are led out of the ball-milling tank through the hollow rod piece, wherein the sensorsand the ultrasonic generator are arranged in the ball-milling tank.

The invention discloses a polymerization kettle for producing suspension polytetrafluoroethylene, and relates to the field of polymerization kettles. The polymerization kettle comprises a kettle body,a stirrer shaft is installed at the inner lower part of the kettle body, a stirring blade is installed at the top of the stirrer shaft, and a machine seal system is arranged between the stirrer shaftand the kettle body; a motor system is installed at the bottom for driving, a material discharging ball valve is installed at the lower part of the kettle body, the exterior of a kettle wall is provided with a reaction kettle jacket, an upper refrigerant inlet and a lower refrigerant outlet, and energy released during a reaction can be taken away in time; a material inlet, a hand hole and a manhole are arranged in an upper seal head of the kettle body; two baffles are inserted into the kettle from the upper seal head of the kettle body in a suspended mode, and each baffle flange is arranged between one corresponding flange and one corresponding flange gland and is fixed through a bolt; and a reinforcing plate is welded to the upper portion of each baffle, and each baffle adopts an oval polished pipe. The polymerization kettle provided by the invention can reduce material sticking to the wall by adjusting the reaction rate through the baffles, and is easy to clean.