CN107521000B - It is a kind of to prepare waste tire fine rubber powder production line - Google Patents

Abstract

The invention relates to the technical field of resource recycling and comprehensive utilization, in particular to a production line for preparing fine rubber powder from waste tires. It is characterized in that it includes a distribution tank assembly, a separator assembly, a grinding assembly, a classifier assembly, an air box pulse bag collection assembly, a spiral stepped blade separation assembly, and a turntable assembly. It is undoubtedly ideal to complete the process of conveying, sterilizing, separating, sorting, protecting and other processes in the production process of waste tire fine rubber powder by water vapor. Water vapor is used as the pneumatic conveying carrier of waste tire fine rubber powder compared with mechanical conveying methods. It has the advantages of cost reduction, energy saving, automation, and labor intensity reduction. As a sterilization medium for waste tire fine rubber powder, water vapor can effectively kill microorganisms, inhibit their reproduction and growth, and prevent microbial fermentation and metabolism from decomposing small molecular weights. combustibles, improve the safety level of fire protection, and solve the problem of spontaneous combustion of rubber powder accumulations stored at room temperature.

Description

A production line for preparing waste tire fine rubber powder

technical field

The invention relates to the technical field of resource recycling and comprehensive utilization, in particular to a production line for preparing fine rubber powder from waste tires.

Background technique

At present, one of the recycling and comprehensive utilization methods of waste tire rubber is to prepare fine rubber powder. The fine rubber powder of waste tires (38-40 mesh) can be used as the main raw material of high-quality tire regenerated rubber. The fine rubber powder of waste tires (60-100 mesh) It is an important additive. Adding it to general rubber products can replace raw rubber up to 90%, and at the same time can improve the aging resistance of rubber products. Also in the formula of tire products, 60 mesh waste tire fine rubber powder can replace 10 ~20% of the original rubber can also improve its wear resistance, prolong the service life of the tire, and greatly reduce the cost of the tire. The vulcanized tire rubber has the characteristics of high elasticity, high tensile strength, and easy friction and heat generation. The methods for preparing waste tire fine rubber powder mainly include low-temperature crushing and normal temperature mechanical crushing. The low-temperature crushing method destroys the molecular chain of rubber It is rarely used due to problems such as high energy consumption and high energy consumption. It is usually prepared by normal temperature crushing process and has formed a large-scale industrial production. The main problems that need to be solved by normal temperature mechanical crushing are that the waste tire blocks have high elasticity and are not easy to break. Coking, difficult to sort, flammable when stacked and stored at room temperature, etc. The Chinese invention patent (patent No. CN 201320370849.9, the patent name is a waste rubber crusher) discloses a waste rubber crusher, which is characterized in that: the top of the body is provided with a feed port, and the feed port is equipped with A crushing device, telescopic rods are respectively installed on the two side walls of the machine body below the crushing device, a grinding plate is installed on the telescopic rods, a grinding roller structure is installed in the body below the grinding plate, and a grinding roller structure is installed below the grinding roller structure. The side wall of the machine body is provided with a regrinding discharge port, and a filter screen is correspondingly provided in the body below the grinding roller structure. The fine grinding chamber is equipped with a grinding disc, multiple grinding rings, pull rods and control shafts, multiple grinding rings are arranged in the grinding disc, the top of the grinding ring is connected to the pull rod, and the top of the pull rod is connected to the control shaft. The shaft is driven by a motor. Chinese invention patent (patent number is CN 200910067465.8, patent name is automatic hair-absorbing waste rubber mill) discloses an automatic hair-absorbing waste rubber mill, which is characterized in that it consists of a host system, an air induction system, a power transmission system and a circulation system. Composed of a water cooling system, it is characterized in that the host system is composed of a main body, a grinding head cover, a grinding head cover fixing bolt, a grinding head body, a fixed grinding head, a moving grinding head, a spindle nut, a spindle nut locking piece, a grinding head tight Fixing bolts, front bearings, bearing pressure sleeve fastening bolts, positioning device, front adjustment springs, one-way thrust bearings, adjustment wheels, rear adjustment springs, washers, parallel nuts, rear bearings, bearing sleeves, main shaft pulleys, main shafts , rear bearing seat bolts, upper hopper, bearing pressure sleeve, bearing inner gland and bearing outer gland, the main body is fixedly connected to the main frame; the grinding head cover is fixed to the grinding head body through the fixing bolts of the grinding head cover; the grinding head The body is fixed to the main body through the fastening bolt of the grinding head body; the fixed grinding head is fixed in the grinding head body; the moving grinding head is fixed to the front end of the main shaft through the main shaft nut lock plate and the main shaft nut, and the moving grinding head is installed on the main shaft in turn. The hinge screw, the main shaft sleeve, the front adjustment spring, the rear adjustment spring, the gasket, the tightening nut and the bearing sleeve, the bearing sleeve is equipped with the main shaft pulley; The sleeve is fixed in the middle of the main body through the fastening bolt of the bearing pressure sleeve. The positioning device is installed on the bearing pressure sleeve, and the rear end of the bearing pressure sleeve is connected with the adjustment wheel; Gland and rear bearing bolts; upper front part of the main body is equipped with a hopper; one-way thrust ball bearings are installed on both sides of the adjustment wheel; the outer circle of the conical surface of the fixed grinding head has a protruding long key for positioning In the body of the grinding head, on the inner conical surface, there are 136 straight inner grinding edges along the axis, which are in the shape of a knife; the cone angle of the first 1/3 of the outer cone surface of the moving grinding head is the The inner cone angle is the same; the cone angle of the last 2/3 of the outer cone surface of the movable grinding head is smaller than the inner cone angle of the fixed grinding head; the outer cone surface of the movable grinding head spirally forms a 16° lift angle along the axis, and there are 136 pieces The outer grinding edge is knife-shaped; the air induction system is composed of a suction port, an air duct, an induced fan, a hair storage box and an exhaust cylinder, wherein the suction port is fixed under the grinding head cover in the host system, An air duct is connected to the hair suction port, the air duct is fixedly connected to the induced fan, the outlet end of the induced fan is connected to the hair storage box, an exhaust tube is arranged on the hair storage box, and the induced fan and the hair storage box are fixedly connected to the main frame; The main machine in the main engine system, the induced fan and the hair storage box in the induced air system, the main motor and the reducer in the power transmission system are all fixedly connected to the main frame; the grinding head in the main engine system is equipped with a circulating water cooling system. The circulating water channel; the suction port in the air induction system is fixedly connected to the front end of the grinding head cover in the main machine system, and is connected with the induction fan through the air induction channel in the air induction system; the reducer in the power transmission system is connected with the air induction system The induced draft fan is connected; the reducer in the power transmission system is connected to the main shaft in the host system through the reducer pulley, B-shaped V-belt and the main shaft pulley.

The technical solution proposed in prior art 1 is to use more than four kinds of cutting tools (crushing blades in the feed port, grinding plates, grinding rollers, grinding discs, grinding rings) to crush and sieve through sieves to produce rubber powder. Disadvantages of the method for sorting rubber powder are high energy consumption (vibrating sieve), easy blockage of sieve holes and low sorting efficiency, and the setting of multiple crushing also proves the problem of low sorting efficiency. The crushed and qualified rubber powder cannot be sorted On the one hand, it will increase the energy consumption, and on the other hand, it will reduce the quality of the rubber powder. It can be found from the observation of the rubber powder particles under the microscope that there are many short branch bundles on the surface of the rubber powder crushed by mechanical shearing, which can be used as substitutes for the original rubber. When fillers are used, these short branch bundles can be well entangled and grafted with rubber molecular chains. However, during repeated mechanical processing, the rubber powder will be scorched and carbonized due to frictional heat generation and the rubber will be vulcanized. The problem of quality index decline; the existing technology 2 adopts screw extrusion (auger) to transport waste tire blocks into the grinding head for mechanical crushing. The grinding head is composed of a moving grinding head and a fixed grinding head. This technical solution is the largest The defect is how to solve the problem that the frictional heat generated by the rubber powder is not cooled well, and the scorching and carbonization of the rubber powder will reduce the performance of the rubber. Since the rubber powder of 20-120 meshes needs to be processed, the gap between the movable grinding head and the fixed grinding head is very small, and the waste The tire block cannot enter, and has to be forced in by screw extrusion. During the grinding process, the rubber powder will inevitably accumulate a large amount of heat and cannot be cooled. Therefore, the comparative document 2 uses two methods of circulating water cooling and air cooling in the grinding head to try to cool down. However, it is difficult to achieve the cooling effect by these two methods. Due to the low thermal conductivity of rubber, the way of heat conduction through water-grinding-rubber particles, and the limited heat exchange area, the cooling technology scheme of circulating water in the grinding head has a relatively low heat exchange efficiency. Low, unable to take away the large amount of heat accumulated by the friction of rubber powder and the shearing process of the grinding head in time; the technical solution of air cooling cannot form convection due to the sealing of the auger and the grinding head The air induction system only plays the role of automatic hair suction).

Contents of the invention

Aiming at the deficiencies of the prior art, the object of the present invention is to provide a production line for preparing waste tire fine rubber powder, which is characterized in that it includes a distribution tank assembly, a separator assembly, a grinding assembly, a classifier assembly, and an air box pulse bag collection assembly , Spiral step blade separation assembly, turntable assembly.

The distribution tank assembly, separator assembly, grinding assembly, classifier assembly, air box pulse bag collection assembly, spiral step blade separation assembly, and turntable assembly are connected in sequence.

The distribution tank assembly includes a header, an annular header, a Venturi tube, an electric butterfly valve, and a center drop pipe.

The separator assembly includes a center drop tube, an inclined liner, an inner cone, a folding door assembly, and a separator body. The folding door assembly includes a link chain, an adjustment handle, and a folding blade, which can be adjusted by adjusting the handle. Toggle the link chain to adjust the angle of the blade.

The grinding assembly includes a passive grinding roller assembly, an active grinding grate assembly, a machine body, a scraper device, an impurity discharge outlet, a skirt seat, a driving device, steam inlet I, and steam inlet II.

The passive grinding roller assembly includes three groups of grinding rollers with an included angle of 120°. Each group of grinding rollers includes a spring loading device, a grinding roller arm, and a grinding disc. The grinding disc is in the shape of a conical disc, and the cutting edge of the conical surface is designed with trapezoidal grinding teeth with a helix angle of 7-9º. The trapezoidal grinding teeth are evenly arranged along the conical surface. The active grinding grate assembly includes a grinding bowl, a conical grate, and a tray. The outer conical surface of the conical grate is designed to be surrounded by spiral blades, the inner wall is designed with vent holes, the tray is a hollow structure, and the bottom is designed with steam inlet II. The steam is purged from the air hole in the conical grate to the working surface of the grinding disc and the grinding bowl. The skirt seat is designed with a steam inlet I, which is tangent to the outer circumference of the skirt seat, and the steam can spiral up along the skirt seat and the inner wall of the machine body. To form a swirling flow, the grinding bowl and conical grate are installed on the tray, and the tray rotates around its own central axis under the drive of the driving device.

A scraper device is designed inside the skirt, when the metal impurities or other hard-to-grind impurities mixed in the rubber powder overflow from the edge of the grinding bowl, they fall into the skirt due to their own weight, and are installed on the tray and rotate with it. The scraper device sweeps these impurities into the impurity discharge port.

The classifier assembly includes sump, spiral inlet assembly, diverter skirt, cylinder, high-fine rubber powder bin, fine rubber powder bin, fine-grade circular screen cage, high-fine-grade circular screen cage, cyclone separator , Blowback port, cross balance fin, elastic rod.

The header is connected to the header of the distribution tank assembly.

The sump is connected with the spiral inlet assembly, and the spiral inlet assembly is connected with the upper part of the fine-grade circular screen cage along the tangential direction of the circumference of the fine-grade circular screen cage, and the fine-grade circular screen cage is connected with the high-fine Circumferential screen cages are respectively installed at the upper and lower ends of the cylinder. The high-fine grade circular screen cage is designed as a waist drum. The fine-grade circular screen cage and the high-fine grade circular screen cage are respectively connected to the cross balance fins through elastic rods. The cylinder body is designed with For the cyclone separator, there is a shunt skirt designed in the cylinder to guide the air flow to the cyclone separator through the vortex inlet assembly, the fine-grade circular screen cage, and the high-fine-grade circular screen cage in sequence.

The diverter skirt distributes the air flowing through the cylinder, a part of the air carries the fine rubber powder of waste tires above 60 mesh and is collected by the high-fine rubber powder bin after being separated by the high-fine-grade circumferential sieve cage, and the other part of the air carries the waste tires of more than 38 mesh The fine rubber powder of the tire is separated by the fine-grade circumferential sieve cage, and is captured by the cyclone separator and falls into the fine rubber powder bin. The high-fine rubber powder bin is connected with the high-fine grade circumferential screen cage. Barrel connection.

The cross balance fin includes a connecting central hub component and paddles.

The blowback port is connected to the lower part of the cylinder along the tangential direction of the circumference of the cylinder. The bottom of the rubber powder bin is designed with a pneumatic control valve, which is connected to the feed port of the spiral stepped blade separation component through a pipeline.

The air box pulse bag collection assembly includes a pulse exhaust blowback control system, a box body, a filter bag group, and a flower plate. The flower plate is fixed in the box, and the filter bag group is fixed in place sequentially in the hole of the flower plate, and the pulse exhaust and blowback control system controls the exhaust and blowback actions of the filter bag group.

The spiral stepped blade separation assembly includes a spiral stepped blade, a cylinder body, a central shaft, and a feed inlet. The spiral stepped blades are installed in spiral steps along the central axis, and the adjacent spiral stepped blades are designed with a spiral upward channel. The central axis maintains a certain degree of coaxiality with the center of the cylindrical body, and the cylindrical body is designed with a steam jacket to realize heat preservation of the spiral stepped blade separation component.

The turntable assembly includes a cone, a mechanical seal, a turntable body, a water jacket, a supporting bearing seat assembly, a finished product storage bin, a scraper, and a worm gear reducer. The cone is fixed on the turntable body and connected with the central shaft, a mechanical seal is designed between the cylindrical body and the turntable body, a water jacket is designed on the turntable body, and the turntable body is erected on the supporting bearing seat assembly, It can rotate around its own center line under the drive of the worm gear reducer, and a scraper is designed in the body of the turntable, which can send the rubber powder into the finished product storage bin.

The inventors found that because waste tire rubber has the characteristics of large elastic deformation and large friction force, the crushing method designed according to its large elastic deformation is shearing, in order to reduce the mechanical energy of the cutter as much as possible into the elastic potential energy of rubber. It is useless work, the gap of the shearing tool is usually designed to be small, and its high friction will inevitably lead to heat generation during the mechanical shearing and crushing process, and it is difficult to dissipate heat in a small space, and the rubber crushed by mechanical shearing The surface of the powder is uneven and there are short branches, which are very easy to accumulate and clump together to store heat and burn, causing the rubber powder to burn and char. Therefore, effective protection methods must be adopted, one is to cool down, and the other is to reduce the amount of oxygen. If the usual means of cooling is adopted, the heat transfer efficiency is unsatisfactory due to the limitation of heat dissipation in a small space, and the higher temperature causes plastic extension of the vulcanized waste tire rubber, that is, the distance between molecular chains becomes larger, resulting in intermolecular forces The reduction makes the cutting easier, thereby improving the production efficiency. For example, the practice in the currently commonly used double-roll crusher shows that the production efficiency of rubber powder with the roller temperature reaching 90-100°C is the highest. Therefore, in this case, water vapor at 105°C is used as the pneumatic conveying carrier and protective agent for the rubber powder. The high-speed purge steam flow can disperse the rubber powder in time to solve the problem of clumping and adhesion, and provide the necessary conditions for sorting; at the same time, the steam heating temperature is stable and controllable It makes the waste tire rubber easy to cut and break; moreover, steam is a good protection medium, which can effectively prevent the waste tire rubber powder from agglomerating, agglomerating, accumulating heat, burning and causing the rubber powder to be scorched and charred.

The inventors have found that the shearing cutters designed for waste tire rubber powder generally have two forms, dynamic-fixed cutters and movable-moving cutters, and the movable-moving cutters only have a small part of the blades working at a time point of work, and the work efficiency is high. Low, but the rubber powder can be discharged from the cutter in time, creating conditions for the next sorting process; usually all the blades of the dynamic-fixed cutter are working, and the work efficiency is high, but heat dissipation becomes a problem that is difficult to solve, and the rubber powder It cannot be discharged from the cutter in time, which will increase the difficulty for the next sorting process. The cutting tool designed in this case combines the advantages of the above two cutting tools, that is, the active grinding grate assembly and the passive grinding roller assembly. The active grinding grate assembly is a moving knife, and the passive grinding roller assembly is a fixed knife. One group of grinding rollers, the active grating assembly rotates during work, and the friction force generated by cutting waste tire rubber drives the three sets of grinding rollers to rotate, and the three sets of grinding rollers appear on the working surface of the grinding discs cutting each other and the working surface between the grinding disc and the active grating assembly The grinding bowl and conical grate cut each other to solve the problem of work efficiency and timely sorting. In the specific design plan, the grinding disc is in the shape of a conical disc, and the cutting edge of the conical surface is designed with trapezoidal grinding teeth with a helix angle of 7-9º, and the trapezoidal grinding teeth are evenly arranged along the conical surface; the active grinding grate components include grinding bowls, trays, cones Shaped grate, the surface of the grinding bowl is designed to be a smooth plane or designed with trapezoidal grinding teeth evenly arranged along the circumferential surface with a helix angle of 7-9º. Wrapped with blades. When working, the active grate assembly rotates under the drive of the drive assembly, and the rubber particles are fed from the central discharge pipe, cut and crushed by the grinding disc and the conical grate, and fall to the rotating grinding bowl. Under the action of centrifugal force, the rubber particles It moves toward the periphery of the bowl, and when it passes between the bowl and the disc, it is ground into powder, and the ground rubber powder particles continue to move outward, and finally overflow along the periphery of the bowl; while the disc is driven by the tangential friction force of the circumference The self-centered axis rotates, and the three groups of grinding discs cut and break the rubber blocks in pairs. There is a tapered angle between the two groups of grinding discs, which can cut and break the larger rubber blocks and send them to the grinding bowl and the grinding disc for crushing. The grinding roller adopts The external spring loading device exerts a suitable grinding pressure; in order to prevent the three groups of grinding roller heads from accumulating colloidal particles in the space that cannot be ground and causing dead ends, a conical grate is designed, and the outer conical surface of the conical grate is designed to be surrounded by spiral blades. It can cut larger rubber blocks and send them between the grinding bowl and the grinding disc for crushing. It can also be used as a baffle for the air hole to prevent the rubber particles from blocking the air hole. Combined with the internal steam, the rubber powder particles are carried through the periphery of the grinding bowl and spiral up along the inner wall of the machine body from bottom to top. The heavier and coarse rubber powder particles collide with the inclined liner installed at the bottom of the separator body and lose kinetic energy and return to the mill. Bowl regrinding; lighter and fine rubber powder spirals up along the inner wall of the separator through the inclined liner and enters the folding door assembly on the upper part of the separator body, and bends to the blades to make the steam powder mixture swirl in the inner cone, and the fineness The unqualified rubber powder is separated from the swirling flow along the inner wall of the inner cone and returned to the grinding bowl for grinding. The fineness of the rubber powder is input into the header through the Venturi tube and the electric butterfly valve. The fineness of the final product of the rubber powder can be adjusted; when the metal impurities or other difficult-to-grind impurities mixed in the rubber powder overflow from the edge of the grinding bowl, they fall into the skirt due to their own weight, and are installed on the tray and rotate with it. The scraper device sweeps these impurities into the impurity discharge port.

The inventor found that, just like the rotor principle of windmills and helicopters, the cross balance fin faces the airflow in the barrel, and the pressure of the airflow on the blade of the cross balance fin is converted into the driving torque of the blade, which drives the blade to rotate. Due to the constraint of the elastic rod , the cross balance wing blades can only reciprocate to a certain extent along the rotating circumferential plane, thus pulling the elastic rod to produce periodic stretching deformation, and the mechanical vibration generated by the elastic rod is then transmitted to the circumferential screen cage connecting the two ends of the elastic rod, which can remove Block the waste tire rubber powder particles in the sieve mesh, thereby improving the efficiency of sorting the rubber powder in the circumferential sieve cage, and the vibration noise is sealed in the cylinder, reducing the emission of noise pollution.

The inventors found that considering the comprehensive factors such as energy consumption, cost, use, and performance of the production of waste tire fine rubber powder, the general feeding material is 5 mesh rubber block processed into waste tire fine rubber powder of 38 mesh and 60 mesh two levels, Correspondingly design fine grade and high fine grade circular sieve cages and their storage devices. The 38-mesh waste tire fine rubber powder obtained by screening is used as the main raw material for high-quality tire reclaimed rubber, and the 60-mesh waste tire fine rubber The powder is directly used as an additive to replace the original gum.

The inventors found that the fine rubber powder products of waste tires, if they contain a certain amount of water in the process of accumulation and storage, can easily become excellent breeding carriers for microorganisms, and the metabolites produced by these microorganisms during the fermentation process, such as H ₂ , CH ₄ and heat, because rubber powder is a non-good conductor of heat, it makes it difficult for rubber powder deposits to dissipate heat. When the heat accumulates to a certain extent, it will cause heat storage and spontaneous combustion of rubber powder products at a lower flash point. The main cause of spontaneous combustion when stored at room temperature. The way to solve is nothing more than one is to reduce the amount of oxygen, the other is to dissipate heat and cool down, and the third is to kill bacteria. However, rubber powder is produced in large quantities. Due to the cost, it is difficult to store it in a large nitrogen-filled storage tank, and the method of increasing the heat dissipation area by tiling is not easy to implement due to the limited production site. Therefore, production plants generally use high-pile storage. Therefore, the key to solving the problem of heat storage and spontaneous combustion in the normal temperature storage process of rubber powder finished products should be to reduce the moisture contained in the rubber powder and cut off the conditions for the reproduction of microorganisms, so as to avoid the fermentation and metabolism of microorganisms to decompose small molecular weight Combustibles, improve the safety level of fire protection.

The inventors have found that microbial cells are ubiquitous in the environment, and steam heating can effectively kill microbial cells and inhibit their growth. At the same time, the gas-solid separation of water vapor and rubber powder particles in the gaseous state is much less difficult than the liquid-solid separation when it is cooled to water. Therefore, this case adopts the technical solution of pulse air bag to separate steam and capture rubber powder particles. At the same time Combining the technology of cyclone separation and sedimentation separation, the spiral stepped blade is designed. The rubber powder particles carried by the steam continuously collide with the spiral stepped blade and lose energy due to the friction of the inner wall of the cylinder during the spiral upward process along the inner wall of the cylinder, and fall to the turntable body. The steam is discharged through the filter bag along the passage of the spiral stepped blades. Most of the rubber powder particles are intercepted due to the cyclone separation and sedimentation separation of the cylinder and the spiral stepped blades, and a small amount of rubber powder particles are intercepted by the filter bag. The essence is that the filter bag works. The time limit is extended, the time interval of back blowing is extended, and the frequency of starting back blowing of the pulse exhaust back blowing control system is reduced, so as to achieve the process of efficiently separating steam and rubber powder particles. During the rotation of the spiral stepped blade installed on the central shaft, part of the rubber powder particles retained on the spiral stepped blade is transported to the turntable body.

The inventors have found that it is undoubtedly ideal to complete the processes such as transportation, sterilization, separation, sorting, and protection in the production process of waste tire fine rubber powder by water vapor, and water vapor is relatively ideal as a pneumatic transport carrier for waste tire fine rubber powder. Mechanical transportation and other methods have the advantages of cost reduction, energy saving, automation, and labor intensity reduction; water vapor, as a sterilization medium for waste tire fine rubber powder, can effectively kill microorganisms, inhibit their growth, and avoid fermentation and metabolism of microorganisms Decompose combustibles with small molecular weight, improve the safety level of fire protection, and solve the problem of spontaneous combustion of rubber powder accumulations stored at room temperature; water vapor carries waste tire fine rubber powder through sedimentation, cyclone, and filter bags to complete the gas-solid separation process. The liquid-solid separation of water is much easier, and the water necessary for microbial growth is reduced as much as possible; the gas-solid separation process of water vapor carrying fine rubber powder from waste tires also helps the rubber powder particles to complete the sorting process through different sieve holes; water Steam is used as a protective medium for waste tire fine rubber powder, so that it can be transported in a closed space with low oxygen content to prevent it from burning or even detonating.

Compared with the prior art, the present invention at least contains the following advantages: first, in combination with the advantages of the prior art dynamic-fixed cutter and movable-movable cutter, the active grinding grate assembly and the passive grinding roller assembly are designed, and the active grinding grate assembly It is a moving knife, and the passive grinding roller assembly is a fixed knife. The passive grinding roller assembly includes three sets of grinding rollers with a plane angle of 120º. When working, the active grinding grate assembly rotates, and the friction generated by cutting waste tire rubber drives the three sets of grinding rollers to rotate. There are three groups of grinding roller working surfaces, that is, the mutual cutting of the grinding discs and the mutual cutting of the grinding discs and the working surface grinding bowls and conical grates in the active grinding grate assembly, thereby solving the problems of work efficiency and timely sorting; second, by It is undoubtedly ideal to complete the process of transportation, sterilization, separation, sorting, protection and other processes in the production process of waste tire fine rubber powder by water steam. As a pneumatic conveying carrier of waste tire fine rubber powder, water vapor is more effective than mechanical conveying. The advantages of cost reduction, energy saving, automation, and labor intensity reduction; water vapor as a sterilization medium for waste tire fine rubber powder can effectively kill microorganisms, inhibit their growth, and prevent microbial fermentation and metabolism from decomposing small molecular weight Combustibles, improve the safety level of fire protection, and solve the problem of spontaneous combustion of rubber powder accumulations stored at room temperature; water vapor carries waste tire fine rubber powder through sedimentation, cyclone, and filter bags to complete the gas-solid separation process, which is cooled to liquid-solid separation of water It is much easier to provide the moisture necessary for microbial growth as low as possible; the gas-solid separation process of the waste tire fine rubber powder carried by the water vapor also helps the rubber powder particles to complete the sorting process through different sieve holes, and the water vapor as the waste tire fine rubber powder The protective medium of rubber powder enables it to be transported in a confined space with low oxygen content to prevent it from burning or even deflagration; third, just like the rotor principle of windmills and helicopters, the cross balance fins face the airflow in the cylinder, and the airflow feeds the cross balance fins. The pressure of the blade is converted into the driving torque of the blade, which drives the blade to rotate. Due to the constraint of the elastic rod, the cross balance wing blade can only make a certain range of reciprocating swing along the plane of the rotation circle, thus pulling the elastic rod to produce periodic stretching Deformation, the mechanical vibration generated by the elastic rod is then transmitted to the circumferential sieve cage connecting the two ends of the elastic rod, which can remove the waste tire rubber powder particles that block the mesh of the sieve, thereby improving the efficiency of the circumferential sieve cage for sorting rubber powder, and the vibration noise is airtight In the cylinder, the emission of noise pollution is reduced; fourthly, the spiral stepped blade is designed, and the rubber powder particles carried by the steam continuously collide with the spiral stepped blade and lose energy due to friction on the inner wall of the cylinder during the process of spiraling up along the inner wall of the cylinder. The steam falls on the rotating disc body, and the steam is discharged through the filter bag along the channel of the spiral stepped blade. Because the cyclone separation and sedimentation separation of the cylinder and the spiral stepped blade intercept most of the rubber powder particles, a small amount of rubber powder particles are intercepted by the filter bag. It is the extension of the working time of the filter bag, the extension of the time interval of back blowing, and the reduction of the frequency of starting back blowing by the pulse exhaust back blowing control system, so as to achieve the process of efficiently separating steam and rubber powder particles.

Description of drawings

Fig. 1 is a schematic diagram of the front view of a production line for preparing waste tire fine rubber powder according to the present invention.

Fig. 2 is a top view structure schematic diagram of a production line for preparing waste tire fine rubber powder according to the present invention.

Fig. 3 is a schematic diagram of the A-A sectional structure of a production line for preparing fine rubber powder from waste tires according to the present invention.

Fig. 4 is a B-B sectional structure schematic diagram of a production line for preparing waste tire fine rubber powder according to the present invention.

Fig. 5 is a schematic structural diagram of a large sample C of a production line for preparing waste tire fine rubber powder according to the present invention.

Fig. 6 is a schematic diagram of a D large-scale structure of a production line for preparing waste tire fine rubber powder according to the present invention.

Fig. 7 is a partial enlarged structural schematic diagram of E of a production line for preparing waste tire fine rubber powder according to the present invention.

Fig. 8 is a partial enlarged structural schematic diagram of F of a production line for preparing waste tire fine rubber powder according to the present invention.

Fig. 9 is a schematic diagram of a partial enlarged structure of G of a production line for preparing fine rubber powder from waste tires according to the present invention.

Fig. 10 is a H-H sectional structural schematic diagram of a production line for preparing waste tire fine rubber powder according to the present invention.

Fig. 11 is a partial enlarged structure schematic diagram of a production line for preparing waste tire fine rubber powder according to the present invention.

Fig. 12 is a partial enlarged structural schematic diagram of J of a production line for preparing fine rubber powder from waste tires according to the present invention.

Fig. 13 is a partial enlarged structure schematic diagram of a production line for preparing waste tire fine rubber powder according to the present invention.

Fig. 14 is a schematic structural diagram of L large sample of a production line for preparing waste tire fine rubber powder according to the present invention.

Ⅰ—Distribution tank assembly Ⅱ—Separator assembly Ⅲ—Grinding assembly Ⅳ—Classifier assembly

Ⅴ—Air box pulse bag collection assembly Ⅵ—Spiral step blade separation assembly Ⅶ—Turntable assembly

1 - Header 2 - Annular header 3 - Venturi tube 4 - Electric butterfly valve 5 - Center drop pipe

6 - Inclined liner 7 - Inner cone 8 - Folding door assembly 9 - Separator body 10 - Link chain 11 - Adjusting handle 12 - Folding blade 13 - Passive grinding roller assembly

14 - Spring loaded device 15 - Roller arm 16 - Grinding disc 17 - Active grate assembly

18 - steam inlet Ⅰ 19 - steam inlet Ⅱ 20 - grinding roller 21 - body 22 - grinding bowl 23 - tray 24 - scraper device 25 - impurity discharge port 26 - conical grate 27 - spiral belt blade 28 - air hole 29 - Skirt 30 - drive device 31 - sump

32-Spiral inlet assembly 33-Splitter skirt 34-Cylinder body 35-High-fine rubber powder bin 36-Fine rubber powder bin 37-Fine grade circular screen cage 38-High fine grade circular screen cage

39 - cyclone separator 40 - blowback port 41 - cross balance fin 42 - elastic rod

43-Coupling hub assembly 44-Paddle 45-Pneumatic control valve 46-Inlet

47-pulse exhaust blowback control system 48-cabinet 49-filter bag group 50-flower plate

51-spiral stepped blade 52-cylindrical body 53-central shaft 54-cone disc

55－Mechanical seal 56－Turntable body 57－Water jacket 58－Supporting bearing seat assembly

59 - finished product collection warehouse 60 - scraper 61 - worm gear reducer.

Detailed ways

The present invention will be further described below in conjunction with the accompanying drawings and specific embodiments.

As shown in Figure 1, Figure 2, Figure 3, Figure 4, Figure 5, Figure 6, Figure 7, Figure 8, Figure 9, Figure 10, Figure 11, Figure 12, Figure 13, and Figure 14, a kind of preparation waste tire The fine rubber powder production line is characterized by: including distribution tank assembly I, separator assembly II, grinding assembly III, classifier assembly IV, air box pulse bag collection assembly V, spiral step blade separation assembly VI, and turntable assembly VII.

The distribution tank assembly I, separator assembly II, grinding assembly III, classifier assembly IV, air box pulse bag collection assembly V, spiral step blade separation assembly VI, and turntable assembly VII are connected in sequence.

The distribution tank assembly I includes a header 1 , an annular header 2 , a Venturi tube 3 , an electric butterfly valve 4 , and a center drop pipe 5 .

The separator assembly II includes a central drop pipe 5, an inclined liner 6, an inner cone 7, a folding door assembly 8, and a separator body 9, and the folding door assembly 8 includes a link chain 10 and an adjustment handle 11 , Folding to the blade 12, the angle of the folding to the blade 12 can be adjusted by adjusting the handle 11 to move the link chain 10.

The grinding assembly III includes a passive grinding roller assembly 13, an active grinding grate assembly 17, a machine body 21, a scraper device 24, an impurity discharge port 25, a skirt 29, a driving device 30, a steam inlet I18, and a steam inlet II19.

The passive grinding roller assembly 13 includes three groups of grinding rollers 20 with an included angle of 120°. Each group of grinding rollers 20 includes a spring loading device 14, a grinding roller arm 15, and a grinding disc 16. The grinding rollers 20 are applied by an external spring loading device 14. With a suitable grinding pressure, the grinding disc 16 is conical disk-shaped, and the cutting edge of the conical surface is designed with trapezoidal grinding teeth with a helix angle of 7-9º. The trapezoidal grinding teeth are evenly arranged along the conical surface. The grinding roller arm 15 Connected with the grinding disc 16 and fixed on the body 21, the active grinding grate assembly 17 includes a grinding bowl 22, a conical grate 26, and a tray 23. The outer conical surface of the conical grate 26 is designed to be surrounded by a spiral edge 27, and the inner wall Ventilation hole 28 is designed, tray 23 is a hollow structure, steam inlet II 19 is designed at the bottom, steam is purged from the vent hole in conical grate 26 to the working surface of grinding disc 16 and grinding bowl 22, and the skirt 29 is designed with steam Inlet I18, steam inlet I18 is tangent to the outer circumference of the skirt 29, the steam can spiral up along the skirt 29 and the inner wall of the body 21 to form a swirl, the grinding bowl 22 and the conical grate 26 are installed on the tray 23, and the tray 23 Driven by the driving device 30, it rotates around its own central axis.

A scraper device 24 is designed inside the skirt 29. When metal impurities or other difficult-to-grind impurities mixed in the rubber powder overflow from the edge of the grinding bowl 22, they fall into the skirt 29 due to their own weight and are installed on the tray 23 And the scraper device 24 that rotates with it sweeps these foreign materials into the foreign matter discharge port 25.

The classifier assembly IV includes a sump 31, a spiral inlet assembly 32, a diverter skirt 33, a cylinder body 34, a high-fine rubber powder bin 35, a fine rubber powder bin 36, a fine-grade circumferential screen cage 37, a high-fine Stage circumferential screen cage 38, cyclone separator 39, blowback port 40, cross balance fin 41, elastic rod 42.

The collection tank 31 is connected with the header tank 1 of the distribution tank assembly I.

The sump 31 is connected with the spiral inlet assembly 32, and the spiral inlet assembly 32 is connected with the upper part of the fine-grade circumferential screen cage 37 along the tangential direction of the circumference of the fine-grade circular screen cage 37, and the fine-grade circular screen cage Cage 37 and high-fine-grade circumferential screen cage 38 are installed on the upper and lower ends of cylinder 34 respectively. 42 is connected with the cross balance fin 41, the cylinder body 34 is designed with a cyclone separator 39, and the cylinder body 34 is designed with a shunt skirt 33, which guides the air flow through the spiral inlet assembly 32, the fine-grade circumferential screen cage 37, the high The fine grade circumferential screen cage 38 flows to a cyclone separator 39 .

The diverter skirt 33 distributes the air flowing through the barrel 34, a part of the air carries the fine rubber powder of waste tires above 60 meshes and is separated by the high-fine-grade circumferential sieve cage 38 and is collected by the high-fine rubber powder bin 35, and the other part of the air carries The fine rubber powder of waste tires above 38 meshes is separated by the fine-grade circumferential screen cage 37 and then captured by the cyclone separator 39 and falls into the fine rubber powder bin 36. The high-fine rubber powder bin 35 and the high-fine grade circular screen cage 38 Connected, the fine rubber powder bin 36 is connected with the cylinder 34.

The cross balance fin 41 includes a connecting central hub assembly 43 and blades 44 .

The blowback port 40 is connected to the lower part of the cylinder 34 along the tangential direction of the circumference of the cylinder 34 . A pneumatic control valve 45 is designed at the bottom of the rubber powder bin and is connected to the feeding port 46 of the spiral stepped blade separation assembly VI through a pipeline.

The air box pulse bag collection assembly V includes a pulse exhaust blowback control system 47 , a box body 48 , a filter bag set 49 , and a flower plate 50 . The flower plate 50 is fixed in the box body 48, and the filter bag group 49 is fixed in place sequentially in the holes of the flower plate 50, and the pulse exhaust blowback control system 47 controls the exhaust and blowback actions of the filter bag group 49.

The spiral step blade separation assembly VI includes a spiral step blade 51, a cylindrical body 52, a central shaft 53, and a feed port 46. The spiral step blades 51 are installed in spiral steps along the central axis 53 in turn, and the adjacent spiral step blades 51 are designed with In the spiral upward channel, the central axis 53 maintains a certain degree of coaxiality with the center of the cylindrical body 52, and the cylindrical body 52 is designed with a steam jacket to realize heat preservation of the spiral stepped blade separation component VI.

The turntable assembly VII includes a conical disk 54 , a mechanical seal 55 , a turntable body 56 , a water jacket 57 , a supporting bearing seat assembly 58 , a finished product storage bin 59 , a scraper 60 , and a worm gear reducer 61 . The conical disk 54 is fixed on the turntable body 56 and connected with the central shaft 53. A mechanical seal 55 is designed between the cylindrical body 52 and the turntable body 56. The turntable body 56 is designed with a water jacket 57. The turntable body 56 It is erected on the supporting bearing seat assembly 58 and can rotate around its own centerline under the drive of the worm gear reducer 61 . A scraper 60 is designed inside the turntable body 56 to send the rubber powder into the finished product storage bin 59 .

According to the disclosure and teaching of the above specification, those skilled in the art to which the present invention pertains can also make changes and modifications to the above embodiment. Therefore, the present invention is not limited to the specific embodiments disclosed and described above, and some modifications and changes to the present invention should also fall within the protection scope of the claims of the present invention. In addition, although some specific terms are used in this specification, these terms are only for convenience of description and do not constitute any limitation to the present invention.

Claims (1)

1. A production line for preparing waste tire fine rubber powder, which is characterized in that: it includes a distribution tank assembly, a separator assembly, a grinding assembly, a classifier assembly, an air box pulse bag collection assembly, a spiral stepped blade separation assembly, and a turntable assembly; distribution The tank assembly, separator assembly, grinding assembly, classifier assembly, air box pulse bag collection assembly, spiral step blade separation assembly, and turntable assembly are connected in sequence; the distribution tank assembly includes a header, an annular header, a Venturi tube, and an electric butterfly valve , Center drop pipe; separator assembly includes center drop pipe, inclined liner, inner cone, folding door assembly, separator body, folding door assembly includes connecting rod chain, adjustment handle, folding blade, which can be passed through Adjust the handle to move the link chain to adjust the angle of the blade; the grinding assembly includes passive grinding roller assembly, active grinding grate assembly, body, scraper device, impurity discharge port, skirt seat, driving device, steam inlet Ⅰ, steam inlet Ⅱ , the passive grinding roller assembly includes three groups of grinding rollers with an included angle of 120º, each group of grinding rollers includes a spring loading device, a grinding roller arm, and a grinding disc. Disc-shaped, tapered edge is designed with trapezoidal grinding teeth with a helix angle of 7-9º. The trapezoidal grinding teeth are evenly arranged along the conical surface. The grinding roller arm is connected with the grinding disc and fixed on the machine body. The active grinding grate assembly includes grinding Bowl, conical grate, tray, the outer conical surface of the conical grate is designed with spiral blades, the inner wall is designed with vent holes, the tray is hollow, and the bottom is designed with steam inlet II, and the steam flows from the vent hole in the conical grate to The steam is purged from the working surface of the grinding disc and bowl. The skirt seat is designed with steam inlet Ⅰ, which is tangent to the outer circumference of the skirt seat. The steam can spiral up along the skirt seat and the inner wall of the body to form a swirl flow. On the tray, the tray rotates around its own central axis driven by the driving device. A scraper device is designed inside the skirt. When the metal impurities mixed in the rubber powder overflow from the edge of the grinding bowl, they fall into the skirt due to their own weight. The scraper device installed on the tray and rotates with it sweeps these impurities into the impurity discharge port; the classifier assembly includes a sump, a spiral inlet assembly, a diverter skirt, a cylinder, a high-fine rubber powder bin, Fine rubber powder bin, fine-grade circular screen cage, high-fine-grade circular screen cage, cyclone separator, blowback port, cross balance fin, elastic rod, header connection between sump and distribution tank assembly; sump and vortex air intake The spiral inlet assembly is connected to the upper part of the fine-grade circular screen cage along the tangential direction of the circumference of the fine-grade circular screen cage. The fine-grade circular screen cage and the high-fine-grade circular screen cage are installed on the upper and lower ends of the cylinder respectively The high-fine grade circumferential screen cage is designed as a waist drum. The fine-grade circular screen cage and the high-fine grade circular screen cage are respectively connected to the cross balance fin through elastic rods. There is a cyclone separator outside the cylinder, and a shunt skirt is designed inside the cylinder to guide The air flows through the vortex inlet assembly, the fine-grade circumferential screen cage, and the high-fine-grade circular screen cage to the cyclone separator in turn, and the diverter skirt distributes the air flowing through the cylinder, and a part of the air carries the fine rubber powder of waste tires above 60 mesh After being separated by the high-fine grade circular sieve cage, it is collected by the high-fine rubber powder bin, and the other part of the air volume carries waste of more than 38 mesh The tire fine rubber powder is separated by the fine-grade circumferential screen cage and is collected by the cyclone separator and falls into the fine rubber powder bin. The high-fine rubber powder bin is connected with the high-fine grade circumferential screen cage, and the fine rubber powder bin is connected with the cylinder. The cross balance fin includes the connecting central hub assembly and blades, and the blowback port is connected to the lower part of the cylinder along the tangential direction of the circumference of the cylinder. The bottom of the rubber powder bin is designed with a pneumatic control valve and connected to the feed port of the spiral stepped blade separation component through a pipe; The air box pulse bag capture assembly includes a pulse exhaust blowback control system, a box body, a filter bag group, and a flower plate. The blowing control system controls the exhaust and back blowing actions of the filter bag group; the spiral stepped blade separation assembly includes a spiral stepped blade, a cylinder, a central shaft, and a feed inlet. The spiral stepped blades are installed in spiral steps along the central axis, adjacent to each other. The spiral stepped blade is designed with a spiral upward channel, the central axis and the center of the cylinder maintain a certain coaxiality, and the cylinder is designed with a steam jacket to realize the heat preservation of the spiral stepped blade separation component; the turntable component includes a cone, Mechanical seal, turntable body, water jacket, supporting bearing seat assembly, finished product storage bin, scraper, worm gear reducer, the cone is fixed on the turntable body and connected to the central shaft, and a mechanical seal is designed between the cylinder body and the turntable body. Sealing, the turntable body is designed with a water jacket, the turntable body is erected on the supporting bearing seat assembly, and can rotate around its own center line under the drive of the worm gear reducer, and the turntable body is designed with a scraper, which can send the rubber powder into the finished product set warehouse.