CN112171947A

CN112171947A - Preparation process of recycled plastic tile with hollow structure

Info

Publication number: CN112171947A
Application number: CN202011065660.XA
Authority: CN
Inventors: 杨传荣; 董豪; 杨雪亮
Original assignee: Anhui Huanjia Tianyi Renewable Resources Co ltd
Current assignee: Anhui Huanjia Tianyi Renewable Resources Co ltd
Priority date: 2020-09-30
Filing date: 2020-09-30
Publication date: 2021-01-05

Abstract

The invention discloses a preparation process of a recycled plastic tile with a hollow structure. The graphene nanosheets have high specific surface area, low density, high elastic modulus and the like, and can be well dispersed in the straw; the cationic surfactant is a good dispersant, can effectively disperse the graphene nanosheets in the straw powder, is a good bactericide, and effectively prevents the straw-plastic composite material product from mildewing; the coupling agent can improve the compatibility of the straw and the polymer matrix; the drying method can effectively reduce the water content and volatile components of the straw fiber, so that the prepared straw-plastic composite material product is more attractive in appearance and superior in mechanical property, and has the characteristics of simple process, environmental friendliness and the like, and the bending damage load of the recycled plastic tile with the hollow structure is 4726N-5020N.

Description

Preparation process of recycled plastic tile with hollow structure

Technical Field

The invention relates to the technical field of recycled plastic tile preparation, in particular to a preparation process of a recycled plastic tile with a hollow structure.

Background

The plastic tile is made up by using PVC as structural base material and adopting high-weatherability plastic resin of acrylic engineering plastics as surface layer through the processes of composite coextrusion, and does not contain asbestos. The plastic tile is mainly used for multi-storey or low-storey residential buildings with high decorative requirements, and can also be used for long corridors in park buildings, public places and the like. The purlin system slope roof is suitable for the slope roof with the structural base layer made of cast-in-place concrete slabs and the slope roof with the purlin system. The recycled plastic tile with the hollow structure is prepared by processing recycled plastics and preparing a hollow mould.

The whole mechanical strength and chemical properties of the existing recycled plastic tile are not strong, dust and stains usually exist on the surface of the master batch in the preparation process of the plastic tile, the master batch needs to be cooled and cleaned before injection molding, and the existing cooling equipment cannot be used for removing the dust and the stains on the surface of the master batch.

Disclosure of Invention

The invention aims to provide a preparation process of a recycled plastic tile with a hollow structure, which solves the following technical problems: (1) the straw is modified by graphene nanosheets, cationic surfactants, mineral fillers and coupling agents. The graphene nanosheets have high specific surface area, low density, high elastic modulus and the like, and can be well dispersed in the straw; the cationic surfactant is a good dispersant, can effectively disperse the graphene nanosheets in the straw powder, is a good bactericide, and effectively prevents the straw-plastic composite material product from mildewing; the coupling agent can improve the compatibility of the straw and the polymer matrix; mineral fillers can reduce costs. Therefore, the technical scheme of the invention can obviously improve the physical property and the mechanical property of the straw-plastic composite material, can meet the market demand, and uses the combination technology of an alkali extraction method and a drying method to treat the straw fiber. The alkali extraction method can remove unstable substances such as hemicellulose, micromolecular esters and the like in the straw powder, enhance the composite effect of cellulose and polyolefin base materials in the straw, and obtain the straw plastic composite material with excellent mechanical property. The drying method can effectively reduce the water content and volatile components of the straw fiber, so that the prepared straw-plastic composite material product has more attractive appearance and more excellent mechanical property, and has the characteristics of simple process, environmental protection and the like, and the bending damage load of the recycled plastic tile with the hollow structure is 4726N-5020N through measurement; (2) the master batches are placed into a particle inlet of cooling equipment, a cooling water pump is started, the cooling water pump extracts cooling water in a cooling water tank, the cooling water is conveyed into a cooling chamber through a water outlet pipe, two guide plates guide the master batches and the cooling water to enter a position between two cleaning mechanisms, a driving motor output shaft drives belt pulleys to rotate, the two belt pulleys drive two dirt scraping wheels to rotate, the dirt scraping wheels drive the dirt scraping belts to rotate, the two dirt scraping belts scrape stains on the surfaces of the master batches, the dirt on the dirt scraping belts is adsorbed by the dirt scraping wheels, the dirt on the dirt scraping wheels is scraped into a dirt storage groove by the dirt scraping plates to be stored, through the above structural arrangement, the two dirt scraping belts reversely rotate to clean the surfaces of the master batches while the master batches are cooled by the cooling water, and meanwhile, the scraped dirt is effectively collected; (3) the master batches and cooling water enter the particle hopper, the first motor is matched with the first speed reducer to drive the first main shaft to rotate, the first main shaft drives the first pull rod to rotate through the first rotary connecting piece, the first pull rod pulls the hopper door, the master batches and the cooling water in the particle hopper enter the guide hopper, the second motor is matched with the second speed reducer to drive the second main shaft to rotate, the second main shaft drives the short pull rod and the second pull rod to rotate through the second rotary connecting piece, the beating blocks on the first rotary arm and the second rotary arm beat the master batches, then the master batches fall into the conveying pipe, the cooling water flows into the bottom of the cooling chamber through the water outlet, the cooling water is discharged through the water discharge pipe, the conveying motor is started, the output shaft of the conveying motor drives the conveying auger to rotate, the conveying auger conveys the master batches to the discharge pipe, the cooled master batches are obtained from the discharge pipe, and the master batches before entering the conveying pipe are processed, avoid the master batch of too much quantity to get into in the conveyer pipe, prevent the condition of carrying the flood dragon to the jam when the master batch is carried, through beater mechanism's design, carry out high-efficient the beating to the master batch after the clearance, beat the separation with the spot that the master batch surface thoroughly scraped from the master batch surface, set up the delivery port on the conveyer pipe, the convenient collection to master batch cooling back cooling water, the cooling water can discharge simultaneously with the spot on master batch surface simultaneously.

The purpose of the invention can be realized by the following technical scheme:

a preparation process of a recycled plastic tile with a hollow structure comprises the following steps:

the method comprises the following steps: weighing 100-110 parts of pretreated straw powder, 0.1-1 part of graphene nanosheet, 1-4 parts of cationic surfactant, 2-10 parts of mineral filler, 4-10 parts of coupling agent, 20-40 parts of regenerated plastic particles, 2-5 parts of compatilizer, 1-5 parts of lubricant, 1-3 parts of colorant, 1-3 parts of antioxidant and 1-3 parts of light stabilizer, placing the pretreated straw powder into a high-speed mixer which is preheated to 105-110 ℃, adding the graphene nanosheet, the cationic surfactant, the mineral filler and the coupling agent, and fully mixing to obtain modified straw powder;

step two: pouring the modified straw powder, the regenerated plastic particles, the compatilizer, the lubricant, the colorant, the antioxidant and the light stabilizer into a mixer, and fully mixing to obtain a mixture;

step three: adding the mixture into a granulator, extruding to obtain master batches, putting the master batches into a particle inlet of cooling equipment, starting a cooling water pump, pumping cooling water in a cooling water tank by the cooling water pump, conveying the cooling water into a cooling chamber through a water outlet pipe, guiding the master batches and the cooling water to enter a space between two cleaning mechanisms by two guide plates, driving a belt pulley to rotate by an output shaft of a driving motor, driving two dirt scraping wheels to rotate by the two belt pulleys, driving the dirt scraping belts to scrape dirt on the surfaces of the master batches, absorbing the dirt on the dirt scraping belts by the dirt scraping wheels, scraping the dirt on the dirt scraping wheels into a dirt storage tank by the dirt scraping plates for storage, then enabling the master batches and the cooling water to enter a particle hopper, driving a first main shaft to rotate by a first motor matched with a first speed reducer, driving a first pull rod to rotate by a first rotary splicing plate, pulling a hopper door by the first pull rod, and enabling the master batches and the cooling water in the particle hopper to enter a, the second motor is matched with the second speed reducer to drive the second main shaft to rotate, the second main shaft drives the short pull rod and the second pull rod to rotate through the second rotary connecting piece, the beating blocks on the first rotary arm and the second rotary arm beat the master batches, then the master batches fall into the conveying pipe, cooling water flows into the bottom of the cooling chamber through the water outlet, the cooling water is discharged through the water discharging pipe, the conveying motor is started, the output shaft of the conveying motor drives the conveying auger to rotate, the conveying auger conveys the master batches to the discharging pipe, and the cooled master batches are obtained from the discharging pipe;

step four: and (3) putting the master batch into an injection molding machine, injecting the master batch into a hollow recycled plastic tile mold, and opening the mold to obtain the recycled plastic tile with the hollow structure.

Further, the graphene nanosheets are powdery solids, the purity of the graphene nanosheets is 90% -99%, the thickness of the graphene nanosheets is 0.3-2 nm, and the transverse dimension of the graphene nanosheets is 1-5 microns; the cationic surfactant is a quaternary ammonium salt type cationic surfactant; the mineral filler is one of calcium carbonate, calcium sulfate, talcum powder, fly ash and calcium silicate; the coupling agent is one of silane coupling agent and titanate coupling agent.

Further, the straw powder is one of wheat straw powder, rice straw powder, corn straw powder, rape straw powder and cotton straw powder; the regenerated plastic particles are at least one of regenerated polyethylene particles and regenerated polypropylene particles; the compatilizer is at least one of maleic anhydride grafted polyethylene and maleic anhydride grafted polypropylene; the lubricant is at least one of stearic acid, zinc stearate, calcium stearate, polyethylene wax, oxidized polyethylene wax and ethylene bis stearamide; the colorant is at least one of carbon black, iron oxide red, iron oxide yellow, titanium dioxide, phthalocyanine blue and phthalocyanine green; the antioxidant is one of antioxidant 1010, antioxidant 1076, antioxidant 264, antioxidant BHT and antioxidant TNP; the light stabilizer is one of light stabilizer AM-101, light stabilizer GW-540, light stabilizer 944, light stabilizer 744, ultraviolet absorbent UV-326 and ultraviolet absorbent UV-531.

Further, the straw powder pretreatment method comprises the following steps: firstly, soaking straw powder in 0.5-5 mol/L sodium hydroxide or potassium hydroxide aqueous solution for 24 hours, and then washing to be neutral; then, putting the straw powder into a machine barrel of a heat conduction pipe type dryer to enable the straw powder to be in contact with the inner part of a jacket of the dryer, rotating and stirring the straw powder in the inner heat conduction pipe and the outer heat conduction pipe of the dryer in a reciprocating mode, discharging the straw powder through an exhaust port with negative pressure at the top end of the dryer, allowing the straw powder to enter a circulating cooling box, and allowing condensed water to flow into an impurity storage tank with a liquid seal groove after the straw powder is fully condensed; finally, discharging the dried straw powder through a discharging box; the water content of the dried straw powder is less than 3 percent.

Further, the cooling equipment comprises a cooling chamber and a cooling water tank, a cooling water pump is arranged between the cooling chamber and the cooling water tank, the pumping end of the cooling water pump is communicated with the cooling water tank through a water pipe, the water outlet end of the cooling water pump is provided with a water outlet pipe, one end of the water outlet pipe, which is far away from the cooling water pump, is communicated with the top of the cooling chamber, the top of the cooling chamber is provided with a particle inlet, the inner cavity of the cooling chamber is provided with two guide plates, two cleaning mechanisms are arranged below the two guide plates and symmetrically arranged, each cleaning mechanism comprises a dirt scraping belt and two driving wheels, the dirt scraping belts are in transmission connection through the two driving wheels, the two driving wheels are distributed up and down, one side of the dirt scraping belt is provided with a dirt scraping wheel, the dirt scraping wheel is in contact with the dirt scraping belt, a dirt storage tank is arranged below the dirt storage tank, the device comprises a dirt scraping plate, two cleaning mechanisms, two blocking mechanisms, two first rotating connecting plates, two beating mechanisms, two first rotating arms, two second rotating arms and two second pull rods, wherein the dirt scraping plate is in contact with a dirt scraping wheel, the particle buckets are arranged below the two cleaning mechanisms, the two blocking mechanisms are arranged at the bottoms of the particle buckets and comprise blocking buckets, a bucket door is rotatably arranged on the blocking buckets, the two first pull rods are rotatably arranged on the two sides of the bucket door, one ends of the first pull rods, far away from the bucket door, are rotatably connected with the first rotating connecting plates which are respectively fixed at the two ends of a first main shaft, the first main shaft is connected with a first speed reducer output shaft, the first speed reducer input shaft is connected with a first motor output shaft, the two beating mechanisms are arranged below the two blocking mechanisms and correspond to the two blocking mechanisms one by one, the beating mechanisms comprise guide buckets, the two first rotating arms and the two, the second rotating arm is rotatably provided with a short pull rod, the second pull rod and the short pull rod are respectively rotatably arranged at two ends of a second rotary joint piece, the two second rotary joint pieces are respectively fixed at two ends of a second main shaft, the second main shaft is connected with an output shaft of a second speed reducer, an input shaft of the second speed reducer is connected with an output shaft of a second motor, and the first rotating arm and the second rotating arm are both provided with beating blocks;

the conveying pipe that the slope set up is installed to the cooling chamber lateral wall, conveyer pipe one end extends to the cooling chamber inner chamber, the conveyer pipe internal rotation is provided with carries the flood dragon, the discharging pipe is installed to conveyer pipe one end, install conveying motor on the discharging pipe, conveying motor output shaft carries the flood dragon, and the conveyer pipe bottom that is located the cooling chamber inner side has seted up a plurality of delivery ports, cooling chamber one side is close to the bottom position and has seted up the drain pipe, the lateral shell is installed to the cooling chamber outer lateral wall, the lateral shell internal rotation is provided with the belt pulley, connects through belt transmission between two belt pulleys, and two belt pulleys scrape dirty wheel one-to-one with two, scrape dirty wheel and belt pulley coaxial coupling, install driving motor on the lateral shell, one of them belt pulley of.

Furthermore, the water outlet pipe is communicated with the middle position of the top of the cooling chamber, and the two guide plates are symmetrically arranged on the inner walls of the two sides of the cooling chamber.

The invention has the beneficial effects that:

(1) the invention relates to a preparation process of a recycled plastic tile with a hollow structure, which adopts graphene nanosheets, cationic surfactant, mineral filler and coupling agent to modify straws. The graphene nanosheets have high specific surface area, low density, high elastic modulus and the like, and can be well dispersed in the straw; the cationic surfactant is a good dispersant, can effectively disperse the graphene nanosheets in the straw powder, is a good bactericide, and effectively prevents the straw-plastic composite material product from mildewing; the coupling agent can improve the compatibility of the straw and the polymer matrix; mineral fillers can reduce costs. Therefore, the technical scheme of the invention can obviously improve the physical property and the mechanical property of the straw-plastic composite material, can meet the market demand, and uses the combination technology of an alkali extraction method and a drying method to treat the straw fiber. The alkali extraction method can remove unstable substances such as hemicellulose, micromolecular esters and the like in the straw powder, enhance the composite effect of cellulose and polyolefin base materials in the straw, and obtain the straw plastic composite material with excellent mechanical property. The drying method can effectively reduce the water content and volatile components of the straw fiber, so that the prepared straw-plastic composite material product has more attractive appearance and more excellent mechanical property, and has the characteristics of simple process, environmental protection and the like, and the bending damage load of the recycled plastic tile with the hollow structure is 4726N-5020N through measurement;

(2) the master batches are placed into a particle inlet of cooling equipment, a cooling water pump is started, the cooling water pump extracts cooling water in a cooling water tank, the cooling water is conveyed into a cooling chamber through a water outlet pipe, two guide plates guide the master batches and the cooling water to enter a position between two cleaning mechanisms, a driving motor output shaft drives belt pulleys to rotate, the two belt pulleys drive two dirt scraping wheels to rotate, the dirt scraping wheels drive the dirt scraping belts to rotate, the two dirt scraping belts scrape stains on the surfaces of the master batches, the dirt on the dirt scraping belts is adsorbed by the dirt scraping wheels, the dirt on the dirt scraping wheels is scraped into a dirt storage groove by the dirt scraping plates to be stored, through the above structural arrangement, the two dirt scraping belts reversely rotate to clean the surfaces of the master batches while the master batches are cooled by the cooling water, and meanwhile, the scraped dirt is effectively collected;

(3) the master batches and cooling water enter the particle hopper, the first motor is matched with the first speed reducer to drive the first main shaft to rotate, the first main shaft drives the first pull rod to rotate through the first rotary connecting piece, the first pull rod pulls the hopper door, the master batches and the cooling water in the particle hopper enter the guide hopper, the second motor is matched with the second speed reducer to drive the second main shaft to rotate, the second main shaft drives the short pull rod and the second pull rod to rotate through the second rotary connecting piece, the beating blocks on the first rotary arm and the second rotary arm beat the master batches, then the master batches fall into the conveying pipe, the cooling water flows into the bottom of the cooling chamber through the water outlet, the cooling water is discharged through the water discharge pipe, the conveying motor is started, the output shaft of the conveying motor drives the conveying auger to rotate, the conveying auger conveys the master batches to the discharge pipe, the cooled master batches are obtained from the discharge pipe, and the master batches before entering the conveying pipe are processed, avoid the master batch of too much quantity to get into in the conveyer pipe, prevent the condition of carrying the flood dragon to the jam when the master batch is carried, through beater mechanism's design, carry out high-efficient the beating to the master batch after the clearance, beat the separation with the spot that the master batch surface thoroughly scraped from the master batch surface, set up the delivery port on the conveyer pipe, the convenient collection to master batch cooling back cooling water, the cooling water can discharge simultaneously with the spot on master batch surface simultaneously.

Drawings

The invention will be further described with reference to the accompanying drawings.

FIG. 1 is a schematic view of the structure of the cooling apparatus of the present invention;

FIG. 2 is an internal structural view of the present invention;

FIG. 3 is a schematic structural view of the cleaning mechanism of the present invention;

FIG. 4 is an internal structure view of the soil storage tank of the present invention;

FIG. 5 is a perspective view of the blocking mechanism of the present invention;

fig. 6 is a schematic structural view of the flapping mechanism of the present invention.

In the figure: 1. a cooling chamber; 2. a cooling water tank; 3. a cooling water pump; 4. a water outlet pipe; 5. a particle inlet; 6. a guide plate; 7. a cleaning mechanism; 8. scraping a dirty belt; 9. a driving wheel; 10. a dirt scraping wheel; 11. a sewage storage tank; 111. a dirt scraping plate; 12. a particle hopper; 13. a blocking mechanism; 14. a blocking hopper; 15. a hopper door; 16. a first pull rod; 17. a first swivel piece; 18. a first main shaft; 19. a first decelerator; 20. a first motor; 21. a flapping mechanism; 22. a guide hopper; 23. a first rotation arm; 24. a second rotating arm; 25. a second pull rod; 26. a short pull rod; 27. a second swivel piece; 28. a second main shaft; 29. a second decelerator; 30. a second motor; 31. beating blocks; 32. a delivery pipe; 33. conveying a flood dragon; 34. a conveying motor; 35. a discharge pipe; 36. a drain pipe; 37. a side casing; 38. the motor is driven.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

Please refer to FIGS. 1-6

Example 1

the method comprises the following steps: weighing 100 parts of pretreated straw powder, 0.1 part of graphene nanosheet, 1 part of cationic surfactant, 2 parts of mineral filler, 4 parts of coupling agent, 20 parts of regenerated plastic particles, 2 parts of compatilizer, 1 part of lubricant, 1 part of colorant, 1 part of antioxidant and 1 part of light stabilizer in parts by weight, putting the pretreated straw powder into a high-speed mixer preheated to 105 ℃, adding the graphene nanosheet, the cationic surfactant, the mineral filler and the coupling agent, and fully mixing to obtain modified straw powder;

step three: adding the mixture into a granulator, extruding to obtain master batches, putting the master batches into a particle inlet 5 of cooling equipment, starting a cooling water pump 3, pumping cooling water in a cooling water tank 2 by the cooling water pump 3, conveying the cooling water into a cooling chamber 1 through a water outlet pipe 4, leading the master batches and the cooling water to enter a space between two cleaning mechanisms 7 by two guide plates 6, driving a belt pulley to rotate by an output shaft of a driving motor 38, driving two dirt scraping wheels 10 to rotate by the two belt pulleys, driving a dirt scraping belt 8 to rotate by the dirt scraping wheel 10, scraping dirt on the surface of the master batches by the two dirt scraping belts 8, adsorbing the dirt on the dirt scraping belt 8 by the dirt scraping wheel 10, scraping the dirt on the dirt scraping wheel 10 into a dirt storage tank 11 by a dirt scraping plate 111, then feeding the master batches and the cooling water into a particle hopper 12, driving a first main shaft 18 to rotate by a first motor 20 in cooperation with a first speed reducer 19, driving a first pull rod 16 to rotate by a first rotary, the first pull rod 16 pulls the hopper door 15, the master batches and cooling water in the particle hopper 12 enter the guide hopper 22, the second motor 30 is matched with the second speed reducer 29 to drive the second main shaft 28 to rotate, the second main shaft 28 drives the short pull rod 26 and the second pull rod 25 to rotate through the second rotary connecting piece 27, the beating blocks 31 on the first rotary arm 23 and the second rotary arm 24 beat the master batches, then the master batches fall into the conveying pipe 32, the cooling water flows into the bottom of the cooling chamber 1 through the water outlet, the cooling water is discharged through the water discharge pipe 36, the conveying motor 34 is started, the output shaft of the conveying motor 34 drives the conveying auger 33 to rotate, the conveying auger 33 conveys the master batches to the discharge pipe 35, and the cooled master batches are obtained from the discharge pipe 35;

Specifically, the graphene nanosheet is a powdery solid with a purity of 90%, a thickness of 0.3nm and a transverse dimension of 1 μm; the cationic surfactant is quaternary ammonium salt type cationic surfactant; the mineral filler is calcium carbonate; the coupling agent is a silane coupling agent.

The straw powder is wheat straw powder; the regenerated plastic particles are regenerated polyethylene particles; the compatilizer is maleic anhydride grafted polyethylene; the lubricant is stearic acid; the colorant is carbon black; the antioxidant is antioxidant 1010; the light stabilizer is light stabilizer AM-101.

The straw powder pretreatment method comprises the following steps: firstly, soaking straw powder in 0.5mol/L sodium hydroxide aqueous solution for 24 hours and then washing the straw powder to be neutral; then, putting the straw powder into a machine barrel of a heat conduction pipe type dryer to enable the straw powder to be in contact with the inner part of a jacket of the dryer, rotating and stirring the straw powder in the inner heat conduction pipe and the outer heat conduction pipe of the dryer in a reciprocating mode, discharging the straw powder through an exhaust port with negative pressure at the top end of the dryer, allowing the straw powder to enter a circulating cooling box, and allowing condensed water to flow into an impurity storage tank with a liquid seal groove after the straw powder is fully condensed; finally, discharging the dried straw powder through a discharging box; the water content of the dried straw powder is less than 3 percent.

The bending breakage load of the recycled plastic tile having a hollow structure of example 1 was 4726N.

Example 2

the method comprises the following steps: weighing 110 parts of pretreated straw powder, 1 part of graphene nanosheet, 4 parts of cationic surfactant, 10 parts of mineral filler, 10 parts of coupling agent, 40 parts of regenerated plastic particles, 5 parts of compatilizer, 5 parts of lubricant, 3 parts of colorant, 3 parts of antioxidant and 3 parts of light stabilizer in parts by weight, putting the pretreated straw powder into a high-speed mixer preheated to 110 ℃, adding the graphene nanosheet, the cationic surfactant, the mineral filler and the coupling agent, and fully mixing to obtain modified straw powder;

step three: step three is the same as example 1;

Specifically, the graphene nanosheet is a powdery solid with the purity of 99%, the thickness of 2nm and the transverse dimension of 5 μm; the cationic surfactant is quaternary ammonium salt type cationic surfactant; the mineral filler is calcium silicate; the coupling agent is titanate coupling agent. The straw powder is cotton straw powder; the regenerated plastic particles are regenerated polypropylene particles; the compatilizer is maleic anhydride grafted polypropylene; the lubricant is ethylene bis stearamide; the colorant is phthalocyanine green; the antioxidant is antioxidant TNP; the light stabilizer is ultraviolet light absorber UV-531. The straw powder pretreatment method comprises the following steps: firstly, soaking straw powder in 5mol/L potassium hydroxide aqueous solution for 24 hours and then washing the straw powder to be neutral; then, putting the straw powder into a machine barrel of a heat conduction pipe type dryer to enable the straw powder to be in contact with the inner part of a jacket of the dryer, rotating and stirring the straw powder in the inner heat conduction pipe and the outer heat conduction pipe of the dryer in a reciprocating mode, discharging the straw powder through an exhaust port with negative pressure at the top end of the dryer, allowing the straw powder to enter a circulating cooling box, and allowing condensed water to flow into an impurity storage tank with a liquid seal groove after the straw powder is fully condensed; finally, discharging the dried straw powder through a discharging box; the water content of the dried straw powder is less than 3 percent.

The bending breaking load of the recycled plastic tile having a hollow structure of example 2 was 5020N.

The cooling equipment comprises a cooling chamber 1 and a cooling water tank 2, wherein a cooling water pump 3 is arranged between the cooling chamber 1 and the cooling water tank 2, the water pumping end of the cooling water pump 3 is communicated with the cooling water tank 2 through a water pipe, a water outlet pipe 4 is arranged at the water outlet end of the cooling water pump 3, one end of the water outlet pipe 4, which is far away from the cooling water pump 3, is communicated with the top of the cooling chamber 1, a particle inlet 5 is formed in the top of the cooling chamber 1, two guide plates 6 are arranged in the inner cavity of the cooling chamber 1, two cleaning mechanisms 7 are arranged below the two guide plates 6, the two cleaning mechanisms 7 are symmetrically arranged, each cleaning mechanism 7 comprises a dirt scraping belt 8 and two driving wheels 9, the dirt scraping belts 8 are in transmission connection through the two driving wheels 9, the two driving wheels 9 are distributed up and down, a dirt scraping wheel 10 is arranged on one side of the dirt scraping belt 8, the dirt scraping wheel 10 is in contact with, the dirt scraping plate 111 is in contact with the dirt scraping wheel 10, the particle bucket 12 is arranged below the two cleaning mechanisms 7, the two blocking mechanisms 13 are arranged at the bottom of the particle bucket 12, each blocking mechanism 13 comprises a blocking bucket 14, a bucket door 15 is rotatably arranged on each blocking bucket 14, two first pull rods 16 are rotatably arranged on two sides of each bucket door 15, one end, far away from each bucket door 15, of each first pull rod 16 is rotatably connected with a first rotating sheet 17, the two first rotating sheets 17 are respectively fixed at two ends of a first main shaft 18, the first main shaft 18 is connected with an output shaft of a first speed reducer 19, an input shaft of the first speed reducer 19 is connected with an output shaft of a first motor 20, the two beating mechanisms 21 are arranged below the two blocking mechanisms 13, the two beating mechanisms 21 are in one-to-one correspondence with the two blocking mechanisms 13, the two beating mechanisms 21 comprise guide buckets 22, two first rotating arms 23 and two second rotating arms 24 are symmetrically and rotatably arranged on two sides of the guide buckets 22, the, a short pull rod 26 is rotatably mounted on the second rotating arm 24, the second pull rod 25 and the short pull rod 26 are respectively rotatably mounted at two ends of a second rotating sheet 27, the two second rotating sheets 27 are respectively fixed at two ends of a second main shaft 28, the second main shaft 28 is connected with an output shaft of a second speed reducer 29, an input shaft of the second speed reducer 29 is connected with an output shaft of a second motor 30, and beating blocks 31 are respectively mounted on the first rotating arm 23 and the second rotating arm 24;

conveyer pipe 32 that the slope set up is installed to 1 lateral wall in cooling chamber, conveyer pipe 32 one end extends to 1 inner chamber in cooling chamber, the conveyer pipe 32 internal rotation is provided with carries flood dragon 33, discharging pipe 35 is installed to conveyer pipe 32 one end, install conveyor motor 34 on the discharging pipe 35, conveyor motor 34 output shaft carries flood dragon 33, be located 1 inboard conveyer pipe 32 bottom in cooling chamber and seted up a plurality of delivery ports, 1 one side in cooling chamber is close to the bottom position and has seted up drain pipe 36, lateral shell 37 is installed to 1 lateral wall in cooling chamber, the internal rotation of lateral shell 37 is provided with the belt pulley, connect through belt transmission between two belt pulleys, two belt pulleys and two dirty wheel 10 one-to-one scrape, scrape dirty wheel 10 and belt pulley coaxial coupling, install driving motor 38 on the lateral shell 37, one of them.

The water outlet pipe 4 is communicated with the middle position of the top of the cooling chamber 1, and the two guide plates 6 are symmetrically arranged on the inner walls of the two sides of the cooling chamber 1.

The foregoing is merely exemplary and illustrative of the present invention and various modifications, additions and substitutions may be made by those skilled in the art to the specific embodiments described without departing from the scope of the invention as defined in the following claims.

Claims

1. A preparation process of a recycled plastic tile with a hollow structure is characterized by comprising the following steps:

step three: adding the mixture into a granulator, extruding to obtain master batches, putting the master batches into a particle inlet of cooling equipment, starting a cooling water pump, pumping cooling water in a cooling water tank by the cooling water pump, conveying the cooling water into a cooling chamber through a water outlet pipe, guiding the master batches and the cooling water between two cleaning mechanisms by two guide plates, driving a belt pulley to rotate by an output shaft of a driving motor, driving two dirt scraping wheels to rotate by the two belt pulleys, driving a dirt scraping belt to rotate by the dirt scraping wheels, scraping dirt on the surface of the master batches by the two dirt scraping belts, adsorbing the dirt on the dirt scraping belts by the dirt scraping wheels, scraping the dirt on the dirt scraping wheels into a dirt storage tank by the dirt scraping plates for storage, then enabling the master batches and the cooling water to enter a particle hopper, driving a first main shaft to rotate by a first motor through a first speed reducer, driving a first pull rod to rotate by a first rotary connecting plate, pulling a hopper door by the first pull rod, and enabling the master batches and the cooling water, the second motor drives the second main shaft to rotate through the second speed reducer, the second main shaft drives the short pull rod and the second pull rod to rotate through the second rotary connecting piece, the beating blocks on the first rotary arm and the second rotary arm beat the master batches, then the master batches fall into the conveying pipe, cooling water flows into the bottom of the cooling chamber through the water outlet, the cooling water is discharged through the water discharging pipe, the conveying motor is started, the output shaft of the conveying motor drives the conveying auger to rotate, the conveying auger conveys the master batches to the discharging pipe, and the cooled master batches are obtained from the discharging pipe;

step four: and (3) putting the master batch into an injection molding machine, injecting the master batch into a hollow recycled plastic tile mold by the injection molding machine, and opening the mold to obtain the recycled plastic tile with the hollow structure.

2. The process for preparing recycled plastic tiles with hollow structures as claimed in claim 1, wherein the mineral filler is one of calcium carbonate, calcium sulfate, talc, fly ash and calcium silicate; the coupling agent is one of silane coupling agent and titanate coupling agent.

3. The process for preparing recycled plastic tiles with hollow structures as claimed in claim 1, wherein the recycled plastic particles are one of recycled polyethylene particles and recycled polypropylene particles; the compatilizer is one of maleic anhydride grafted polyethylene and maleic anhydride grafted polypropylene; the lubricant is one of stearic acid, zinc stearate, calcium stearate, polyethylene wax, oxidized polyethylene wax and ethylene bis stearamide; the colorant is one of carbon black, iron oxide red, iron oxide yellow, titanium dioxide, phthalocyanine blue and phthalocyanine green; the antioxidant is one of antioxidant 1010, antioxidant 1076, antioxidant 264, antioxidant BHT and antioxidant TNP; the light stabilizer is one of light stabilizer AM-101, light stabilizer GW-540, light stabilizer 944, light stabilizer 744, ultraviolet absorbent UV-326 and ultraviolet absorbent UV-531.

4. The process for preparing the recycled plastic tile with the hollow structure as claimed in claim 1, wherein the pretreated straw powder is prepared by the following steps: soaking the straw powder in 0.5-5 mol/L sodium hydroxide solution for 24h, washing to be neutral, and then sequentially drying and cooling the straw powder to obtain the pretreated straw powder.

5. The process for preparing recycled plastic tiles with hollow structures as claimed in claim 1, wherein the operation process of the cooling device is as follows:

the master batches are placed into a particle inlet of cooling equipment, a cooling water pump is started, the cooling water pump extracts cooling water in a cooling water tank and conveys the cooling water into a cooling chamber through a water outlet pipe, the master batches and the cooling water are guided between two cleaning mechanisms by two guide plates, an output shaft of a driving motor drives belt pulleys to rotate, the two belt pulleys drive two dirt scraping wheels to rotate, the dirt scraping wheels drive dirt scraping belts to rotate, the two dirt scraping belts scrape dirt on the surfaces of the master batches, the dirt on the dirt scraping belts is adsorbed by the dirt scraping wheels, the dirt on the dirt scraping wheels is scraped into a dirt storage tank by the dirt scraping plates to be stored, then the master batches and the cooling water enter a particle hopper, a first motor drives a first main shaft to rotate through a first speed reducer, the first main shaft drives a first pull rod to rotate through a first rotary splicing piece, the first pull rod drives a hopper door, the master batches and the cooling water in the particle hopper enter a guide hopper, a second motor drives a second main shaft to rotate, the second main shaft drives short pull rod and second pull rod through the second piece of revolving and rotates, and the piece of beating on first rotor arm, the second rotor arm is patted the master batch, and then the master batch falls into in the conveyer pipe, and the cooling water flows into the cooling chamber bottom through the delivery port, and the cooling water passes through the drain pipe and discharges, opens conveying motor, and the conveying motor output shaft drives and carries the flood dragon to rotate, carries the flood dragon to carry the master batch to discharging pipe department, obtains the master batch after the cooling from discharging pipe department.