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45results about How to "Not easy to raise dust" patented technology

Special halogen-free flame-retardant master batch for polypropylene and preparation method for halogen-free flame retardant master batch

The invention discloses a special halogen-free flame-retardant master batch for polypropylene and a preparation method for the halogen-free flame retardant master batch. Components of the master batch comprise, in mass percent, 75-90% of phosphorus-nitrogen halogen-free flame retardant, 8-22% of carrier and 0.1-5% of modified ethylene bis-fatty acid amide. By the aid of the master batch, quality instability of materials due to non-uniform mixing of powder and granules is effectively avoided, easiness in generation of chippings or powder during granule cutting is avoided, production efficiency is improved, and production cost is lowered. Adopting a continuous banburying-extrusion production process leads production efficiency to be high. The master batch effectively solves the problems of easiness in moisture absorption, degradation and foaming of halogen-free flame retardant, so that storage time of the phosphorus-nitrogen halogen-free flame retardant is prolonged, and processability of the phosphorus-nitrogen halogen-free flame retardant is improved. Besides, the special halogen-free flame-retardant master batch for the polypropylene has the advantages of easiness in dispersion, high flame-retardant efficiency and low production cost, and has less influence on physical and mechanical properties, heat resistance, processability and surface color of composite materials than a special traditional halogen-free flame-retardant master batch for polypropylene.
Owner:GUANGZHOU SUPER DRAGON ENG PLASTICS +1

Extrusion forming method of low-order lignite

The invention discloses an extrusion forming method of low-order lignite, relates to the field of lignite and coal briquette preparation, and particular relates to a preparation method which is applicable to lignite and coal briquette with high ash content and gel substances. The method comprises the following steps: (1) crushing and screening lignite blocks to be less than or equal to 3mm; (2) adding a binding agent into the lignite raw material according to a certain ratio, uniformly stirring and subsequently extruding to form the lignite in a coal rod machine; and (3) drying the formed coal rod at 60-100 DEG C till the moisture is less than 15% so as to obtain a coal briquette product, wherein the binding agent refers to a starch binding agent. The method is simple in process, the binding agent is easy to obtain, and an ordinary coal rod machine is used as the extrusion forming equipment for extrusion forming, the dried coal rod product is high in mechanical strength and good in thermal stability, and can be used in a coal gas generator taking the place of lump coal, and the requirements of synthesis ammonia generation process on granularity and mechanical strength of the coal briquette can be met, so that the lignite resource can be scientifically and reasonably utilized, and the production cost can be lowered.
Owner:YUNNAN CHEM RES INST

Small-sized biomass chopped-material direct-fired water boiler

The invention provides a small-sized biomass chopped-material direct-fired water boiler. The water boiler comprises an automatic feeding mechanism and a boiler body, wherein the automatic feeding mechanism consists of a loading box, a feed box, two horizontally placed ejecting rollers and a spiral auger, a draw plate is arranged at the bottom of the loading box, the feed box is positioned below the loading box, the ejecting rollers are mounted in the feed box and provided with radiant pick teeth, and the spiral auger of which the output end is communicated with a feed inlet of the boiler body through a feeding pipe is positioned below the ejecting rollers; and the boiler body consists of a dust collection room, a primary air inlet pipe, a primary air room positioned above the dust collection room and communicated with the primary air inlet pipe, a secondary air inlet pipe, a flue gas steering plate, a secondary air distribution pipe positioned above the primary air room and communicated with the secondary air inlet pipe, a smoke exhaust pipe arranged at the top of a hearth, a flue gas entrained flow air inlet pipe positioned on the side wall of the smoke exhaust pipe and a water jacket on the outer wall of the hearth. The small-sized biomass chopped-material direct-fired water boiler has the advantages of simple structure, low fuel and running costs, cleanliness and convenience in use and high heat efficiency, and is suitable for heating, bathing and the like in wide rural-urban fringe zones and small towns.
Owner:SHANDONG UNIV OF TECH

Movable building rubbish regenerating treatment system

The invention relates to the technical field of building rubbish recovery, in particular to a movable building rubbish regenerating treatment system. The movable building rubbish regenerating treatment system comprises a container, and a smashing device, a forming device, a compacting device and a drying device are arranged in the container. The smashing device is used for smashing concrete to form recycled aggregate, and the smashing device comprises a feeding hopper. Paired smashing rolls are arranged at the bottom of the feeding hopper, and a clearance between the two smashing rolls forms asmashing channel. A forming frame for enabling the recycled aggregate to form rectangular blocks is arranged on a conveying belt. The compacting device comprises a bearing plate fixed below the conveying belt, and a pressing plate for pushing the forming frame are arranged above the bearing plate and the conveying belt. According to the movable building rubbish regenerating treatment system, concrete block and other building rubbish can be smashed and compacted into blocky regeneration bricks; and due to the fact that the recycled aggregate in the generation bricks is bonded firmly, the situation that dust is raised from the recycled aggregate, an air pollution is caused is not likely to happen, and the effect of environmentally friendliness is achieved.
Owner:深圳市绿悦环保科技有限公司

Classification type cyclone dust collection device with multi-section vortex tube combination and implementation method thereof

The invention relates to the technical field of cyclone dust collection equipment, discloses a classification type cyclone dust collection device with a multi-section vortex tube combination, and also discloses an implementation method of the classification type cyclone dust collection device with the multi-section vortex tube combination. The classification type cyclone dust collection device with the multi-section vortex tube combination comprises a supporting frame and a dust collecting barrel fixedly installed at the upper end of the supporting frame. Through the matching of a driving wheel, a belt piece and a driven wheel, a gear A is fixedly installed at the lower end of the driven wheel, a gear B is installed on one side of the gear A in a meshed mode, and the lower end of the gear B is fixedly connected with a second worm; through the matching of the gear A and the gear B, the second worm installed at the lower end of the gear B can rotate, the second worm and a first worm are opposite in rotating directions, the diameter of the driven wheel is larger than the diameter of the driving wheel, namely, the rotating speed of the second worm is lower than the rotating speed of the first worm, the strength of cyclone generated when the rotating speed is low is small, only small-particle dust can be sucked in, and on the contrary, the first worm can suck large-particle dust; and the large particles and the small particles are discharged through a dust removal port respectively.
Owner:JIANGSU XINPENG HEAVY ELECTROMECHANICAL MFG

Urban atmospheric environment quality monitoring system

The invention belongs to the technical field of atmospheric monitoring, and particularly relates to an urban atmospheric environment quality monitoring system which comprises a box body, wherein one side of the box body is communicated with an air inlet pipe, the other side of the box body is provided with a fixing plate, the fixing plate is provided with an air extracting pump, and one end of the air extracting pump is communicated with an exhaust pipe; a groove is formed in the right inner wall of a first cavity, a monitoring probe is arranged in the groove, a hydraulic telescopic rod is installed at the top of the first cavity, a lifting block is arranged at the lower end of the hydraulic telescopic rod, a second cavity is formed in the lifting block, and a through hole is formed in the lower end face of the lifting block; a dust hood is mounted at the lower end of the lifting block, and the lifting block is provided with cleaning velvet; and a supporting plate is installed in the first cavity and provided with a flow guide block, a filter plate is arranged between the supporting plate and the bottom of the first cavity, dust removal liquid is arranged between the filter plate and the bottom of the first cavity, and a water pump is arranged on the left side of the box body. According to the invention, the problem of inaccurate data obtained after measurement due to residual original gas and impurities in the box body after the monitoring of the existing monitoring equipment is completed can be solved.
Owner:刘东

Prefabricated building block

The invention relates to the technical field of building materials, in particular to a prefabricated building block. The prefabricated building block comprises a water permeable surface layer and support layers, wherein the support layers are polygonal prisms, the outer contour of the cross section of the support layers is orthohexagnal, and a plurality of first open holes are formed in the support layers and penetrate the upper and lower surfaces of the support layers, accordingly, the water-permeable function can be realized through the first open holes, and the water storage function can be realized by matching with the water-impermeable ground after installation. Rainwater can enter the first open holes in the support layers through the water permeable surface layer to be stored. When the water quantity is small, the stored water can keep a road in a wet state through evaporation, so that the probability of flying dust on the road is low, the specific heat of the road is increased, the surface temperature is reduced, and the heat island effect is relieved. The support layers are polygonal prisms, and the outer contour of the cross section of the support layers is orthohexagnal, so that when the road is assembled, tightness between the supporting layers is high, flatness is higher, the problem of uneven settlement of a foundation can be effectively solved, and the structure stability is maintained.
Owner:RENCHSAND ECO ENVIRONMENT PROTECTION SCI & TECH CO LTD

A falling pyrolyzer

The invention relates to a falling-type pyrolyzer which comprises a feed opening, a uniform blanking mechanism, a preheating section, a main reactor, a blanking auxiliary mechanism and a charcoal discharge section from top to bottom. The waste or biomass, of which the size is less than 30mm and the water content is 35% or below, is sent into the preheating section by the uniform blanking mechanism, and sent to the main reactor by the preheating section. The preheating section is provided with a vapor outlet. The main reactor is composed of vertical plates or membrane-type vertical tube heat transfer surfaces, and the interval is 1.4-3 times of the maximum particle size; by the aid of the blanking auxiliary mechanism, one side is provided with a heat source port, and the other side is provided with a volatile matter filter layer perpendicular to the heat transfer surface and a discharge port. The generated coke falls into the charcoal discharge section, the unpyrolyzed material is pyrolyzed at the charcoal discharge section, and the retention time is controlled through the charcoal discharge speed. When cold charcoal needs to be discharged, the charcoal discharge section is converted into the cooling section, and a coolant passes through at the cold source side. The falling-type pyrolyzer can adapt to the thermal expansion and cold shrinkage, and has the advantages of no leakage, high capacity and space saving.
Owner:TONGJI UNIV
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