EPP particle processing system

Abstract

The utility model discloses an EPP particle processing system which comprises a sediment removing and EPP particle cleaning structure, a scum removing and EPP particle cleaning structure and a fine washing EPP particle structure. The sediment removing and EPP particle cleaning structure comprises a treatment pond, a feeding port I is formed in the bottom of the treatment pond, the feeding port I is communicated with an EPP particle feeding channel and used for receiving EPP particles to be cleaned, and a discharging port I is formed in the top of the treatment pond; the scum removing and cleaning EPP particle structure comprises a residue filtering pool, a feeding port II is formed in the top of the residue filtering pool and communicated with the discharging port I, and a discharging port II is formed in the bottom of the residue filtering pool; the fine washing EPP particle structure comprises a fine washing pool, a feed port III is formed in the bottom of the fine washing pool, and the feed port III is communicated with the discharge port II; the EPP particles can be pretreated, qualified EPP particles with high surface cleanliness are obtained, the product quality is improved, and the rejection rate is reduced.

Description

Technical Field

[0001] The utility model relates to the field of EPP particle processing, and particularly relates to an EPP particle processing system. Background Art

[0002] In the production process of foamed EPP particles, that is, foamed polypropylene particles, when the EPP particles come out of the reaction kettle, their surfaces are covered with additive powders. If the surfaces are not cleaned, to a certain extent, it will affect the welding of subsequent foamed particles, causing a sharp increase in the molding energy consumption, and even abnormal welding of the molded products, ultimately affecting the surface appearance and mechanical properties of the final molded products, resulting in low product quality and high rejection rates.

[0003] Therefore, to solve the above problems, an EPP particle processing system is needed, which can pre-process the EPP particles to obtain qualified EPP particles with high surface cleanliness, improve product quality, and reduce the rejection rate. Summary of the Utility Model

[0004] In view of this, the purpose of the utility model is to overcome the defects in the prior art and provide an EPP particle processing system, which can pre-process the EPP particles to obtain qualified EPP particles with high surface cleanliness, improve product quality, and reduce the rejection rate.

[0005] The EPP particle processing system of the utility model includes a sediment removal and EPP particle cleaning structure, a scum removal and EPP particle cleaning structure, and a fine washing EPP particle structure;

[0006] The sediment removal and EPP particle cleaning structure includes a treatment tank and a stirring mechanism. A feed inlet Ⅰ is opened at the bottom of the treatment tank. The feed inlet Ⅰ is communicated with the EPP particle feeding channel for receiving the EPP particles to be cleaned. A valve that can be controlled to open and close is arranged between the feed inlet Ⅰ and the EPP particle feeding channel so as to control the amount of EPP particles transported to the treatment tank. An outlet Ⅰ is opened at the top of the treatment tank;

[0007] The stirring mechanism includes a stirring main shaft extending into the treatment tank and stirring blades arranged circumferentially on the stirring main shaft. The stirring main shaft is driven to drive the stirring blades to rotate;

[0008] The stirring main shaft has a main air inlet channel. The stirring blades have a shunt channel. The main air inlet channel is communicated with an air supply source. The shunt channel is communicated with the main air inlet channel. Air outlet holes are arranged on the shunt channel;

[0009] The described scum-removing and cleaning EPP particle structure includes a slag filter tank and a filtering mechanism. A second feed inlet is opened at the top of the slag filter tank. The second feed inlet is communicated with the first discharge outlet. A valve that can be controlled to open and close is arranged between the second feed inlet and the first discharge outlet, so as to control the amount of EPP particles transported from the treatment tank to the slag filter tank. A second discharge outlet is opened at the bottom of the slag filter tank;

[0010] A number of slag overflow holes are opened on the side wall of the slag filter tank, and the aperture of each slag overflow hole is smaller than the diameter of the EPP particles to be cleaned;

[0011] The filtering mechanism includes a functional mesh screen and a pushing cover. The functional mesh screen is arranged on the top of the second feed inlet. The functional mesh screen has a first screening hole, and the aperture of the first screening hole is smaller than the diameter of the EPP particles to be cleaned;

[0012] The slag overflow holes are located at the bottom of the functional mesh screen. A water baffle is arranged at the bottom of the functional mesh screen, and the water baffle is driven to block or cancel the blocking of a number of slag overflow holes;

[0013] A functional port is arranged on the water baffle, and the water baffle is also driven to communicate the functional port with the second feed inlet or the second discharge outlet;

[0014] The pushing cover is arranged inside the functional mesh screen. The pushing cover is located on the top of the second feed inlet. The pushing cover has a second screening hole, and the aperture of the second screening hole is smaller than the diameter of the EPP particles to be cleaned;

[0015] The outer periphery of the pushing cover is roughly fitted with the inner wall periphery of the slag filter tank, and the pushing cover is driven to move in the height direction;

[0016] The described fine-washing EPP particle structure includes a fine-washing tank and a fishing mechanism. A third feed inlet is opened at the bottom of the fine-washing tank. The third feed inlet is communicated with the second discharge outlet. A valve that can be controlled to open and close is arranged between the third feed inlet and the second discharge outlet, so as to control the amount of EPP particles transported from the slag filter tank to the fine-washing tank. The fishing mechanism is used to transfer the EPP particles in the fine-washing tank to the post-treatment process.

[0017] Furthermore, a screening structure is also included. The EPP particles to be cleaned are screened by the screening structure to obtain EPP particles meeting the preset standard; the particle outlet of the screening structure is communicated with the first feed inlet through a feeding channel.

[0018] Furthermore, the first feed inlet is opened in the middle of the bottom of the treatment tank. The bottom of the treatment tank is recessed downward to form a slag storage tank; the slag storage tank is in a ring shape surrounding the first feed inlet.

[0019] Furthermore, the stirring main shaft is located above the first feed inlet, and the central axis of the stirring main shaft is roughly coincident with the central axis of the first feed inlet;

[0020] The stirring blades are several pieces, and the several stirring blades are arranged in a staggered manner in the vertical direction.

[0021] Furthermore, several stirring blades evenly distributed in the circumferential direction of the stirring main shaft at the same height form a group of stirring blades, and several groups of such stirring blade groups are arranged in the height direction.

[0022] Furthermore, the stirring blades arranged in a staggered manner in the vertical direction gradually increase in length from bottom to top.

[0023] Furthermore, the middle part of the stirring blade in the length direction is recessed downward.

[0024] Furthermore, the main air inlet channel is opened in the stirring main shaft in the vertical direction, the air outlet hole is opened at the head end of the stirring blade, and the shunt channel is opened in the stirring blade approximately perpendicular to the main air inlet channel;

[0025] Dispersion holes with downward air outlet directions are also opened in the shunt channel; a diversion plate is arranged in the shunt channel, the diversion plate is located outside the dispersion holes, and air passing holes are opened on the diversion plate; the dispersion holes are obliquely inclined outward from top to bottom, and the diversion plate is obliquely inclined outward from top to bottom.

[0026] Furthermore, the feed port II is opened on the top side wall of the filter residue tank, and the discharge port II is opened on the bottom side wall of the filter residue tank; the lowest point of the overflow slag hole is not lower than the lowest point of the feed port II.

[0027] Furthermore, the water baffle is fixed to the bottom of the functional screen, the center of the top of the functional screen is connected to a rotating shaft, and the rotating shaft is also connected to the functional screen through connecting wings;

[0028] The functional screen is lifted and rotated by being driven by the connecting rotating shaft; a receiving groove is opened in the center of the rotating shaft, the receiving groove penetrates the rotating shaft from top to bottom, a push rod that is driven to extend or shorten is arranged in the receiving groove, the push rod is connected to the center of the top of the material pushing cover, and the material pushing cover is lifted by being driven by the push rod.

[0029] The beneficial effects of the present utility model are as follows: An EPP particle processing system disclosed by the present utility model includes a sediment removal and EPP particle cleaning structure, a scum removal and EPP particle cleaning structure, and a fine washing EPP particle structure; through the provided stirring mechanism, the EPP particles entering the treatment tank can be quickly dispersed, and combined with the ventilation structure, the EPP particles can be dispersed more quickly. At the same time, it can also accelerate the efficiency of removing the dirt attached to the surface of the EPP particles. Combined with the stirring blades with a special structure, the rising rate of the EPP particles is increased, featuring low energy consumption and high efficiency, which can greatly save the cleaning cost. Meanwhile, the slag storage tank at the bottom of the treatment tank can accumulate more particles with heavier mass, making the sediment removal efficiency higher. When a preset amount of EPP particles is introduced into the filter residue tank, the feeding can be stopped. At this time, operate the functional screen to move downward and rotate, and the pushing cover to move downward. On the one hand, the scum is discharged through the overflow hole, and on the other hand, the EPP particles are gathered towards the discharge port, making the discharge port and the functional hole face each other, which is conducive to introducing purer EPP particles into the preset process in the later stage. When the EPP particles are completely discharged in the filter residue tank, reset the pushing cover and the functional screen, and open the feeding port to continue the above operation to achieve the cleaning of the scum mixed in the EPP particles, improve the quality of the EPP particles, improve the product quality, and reduce the rejection rate; through the setting of the fishing mechanism, high-quality EPP particles can be obtained, and the EPP particles after post-treatment can obtain products with higher finished product quality when in use. The entire process of this solution strictly controls the quality of the EPP particles, greatly improving the finished product rate and the finished product quality of the product. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] The present utility model will be further described below with reference to the drawings and embodiments:

[0031] Figure 1 It is a system schematic diagram of the present utility model;

[0032] Figure 2 It is a partial system schematic diagram of the present utility model;

[0033] Figure 3 It is a structural schematic diagram of the present utility model;

[0034] Figure 4 It is a structural schematic diagram of part A of the present utility model;

[0035] Figure 5 It is a top view structural schematic diagram of the stirring main shaft and the stirring paddle blades of the present utility model;

[0036] Figure 6 It is a structural schematic diagram of the filtering mechanism above the discharge port of the present utility model;

[0037] Figure 7This is a schematic structural diagram of the filtering mechanism of the present utility model below the discharge port;

[0038] Figure 8 For the present utility model Figure 6 schematic diagram of the structure at A';

[0039] Figure 9 This is a top view structural diagram of the functional mesh screen of the present utility model. Detailed implementation manners

[0040] Figure 1 This is a system schematic diagram of the present utility model. As shown in the figure, the EPP particle processing system in this embodiment includes a sediment-removing and EPP particle cleaning structure, a scum-removing and EPP particle cleaning structure, and a fine-washing EPP particle structure; Figure 3 The arrow indicates the movement track of the EPP particles; it also includes a reaction kettle for obtaining the EPP particles to be cleaned, and a screening structure for screening qualified EPP particles. The discharge port of the reaction kettle is communicated with the feed port of the screening device. Among them, the reaction kettle and the screening structure can be selected from any one of the existing technologies according to the actual use situation and preset standards to meet the corresponding use functions, which will not be elaborated here.

[0041] The sediment-removing and EPP particle cleaning structure includes a treatment tank 1 and a stirring mechanism. The bottom of the treatment tank 1 is provided with a feed port Ⅰ 2. The feed port Ⅰ is communicated with the EPP particle feeding channel for receiving the EPP particles to be cleaned. The EPP particles to be cleaned are screened by the screening structure to obtain EPP particles meeting the preset standards; the screening standard is set according to the actual situation. In this solution, taking the screening of EPP particles with a preset particle size as an example, the particle size of the qualified EPP particles exceeding the preset value is considered qualified, which will not be elaborated here; the particle outlet of the screening structure is communicated with the feed port Ⅰ through a feeding channel; a valve that can be controlled to open and close is arranged between the feed port Ⅰ and the EPP particle feeding channel so as to control the amount of qualified EPP particles conveyed from the screening structure to the treatment tank. The top of the treatment tank 1 is provided with a discharge port Ⅰ 3;

[0042] The feed inlet Ⅰ2 is opened in the middle of the bottom of the treatment tank 1, and this middle part of the bottom is the central position of the bottom of the treatment tank 1 on the horizontal plane, which is convenient for feeding EPP particles into the treatment tank 1, facilitating the floating of EPP particles in the treatment tank 1, and more conducive to the outward diffusion of EPP particles centered on the feed inlet Ⅰ2; more specifically, the top of the feed inlet Ⅰ2 is a flared opening with a gradually increasing size from bottom to top to improve the feeding rate, facilitate the diffusion of EPP particles in the treatment tank 1, and is conducive to the more rapid sedimentation and attachment of the additives on the surface of EPP. The feed inlet Ⅰ2 protrudes downward from the bottom of the treatment tank 1 to form a feed assembly end of the treatment tank 1, and the feed assembly end of the treatment tank 1 is communicated with the EPP particle feeding channel. The feeding channel connects the particle outlet of the screening structure and the feed inlet Ⅰ to clean the EPP particles with additive powder on the surface and transport them to the treatment tank 1; more advantageously, a booster pump can be set here to improve the feeding efficiency of EPP particles, which will not be elaborated here;

[0043] The discharge outlet Ⅰ3 is opened at the top of the side wall of the treatment tank 1. The discharge outlet Ⅰ3 protrudes outward from the side wall of the treatment tank 1 to form a discharge assembly end of the treatment tank 1, and the discharge assembly end of the treatment tank 1 is communicated with the feed inlet Ⅰ2 of the next-stage treatment process, so that the EPP particles cleaned this time can be transported to the preset treatment process.

[0044] In this embodiment, the bottom of the treatment tank 1 is recessed downward to form a slag storage tank 4. The setting of the slag storage tank 4 can improve the accommodation of sediment and is more conducive to the one-time or periodic water quality cleaning. The slag storage tank 4 can be several divided blocks or an annular tank surrounding the feed inlet Ⅰ2, etc., for the purpose of storing sediment. Among them, for cleaning the slag storage tank 4, any underwater cleaning equipment in the prior art can be selected, which will not be elaborated here; in this embodiment, the slag storage tank 4 is annular and surrounds the feed inlet Ⅰ2, which is conducive to slag storage and cleaning.

[0045] In this embodiment, the stirring mechanism includes a stirring main shaft 5 extending into the treatment tank 1 and stirring blades 6 arranged circumferentially on the stirring main shaft 5. The stirring main shaft 5 is driven to drive the stirring blades 6 to rotate; as shown in the figure, the stirring main shaft 5 is installed in the treatment tank 1 through a frame, and the stirring main shaft 5 is driven to rotate by any power equipment in the prior art to drive the stirring blades 6 to rotate, so as to improve the cleaning efficiency of EPP particles in the treatment tank 1 and ensure the cleaning quality of EPP particles. A forward and reverse motor can be set according to the actual use situation to improve the dispersion ability of EPP particles, which will not be elaborated here; the stirring main shaft 5 is directly above the feed inlet Ⅰ2, and the central axis of the stirring main shaft 5 generally coincides with the central axis of the feed inlet Ⅰ2; the meaning of "generally coincides" is that on the basis of coincidence, construction errors or assembly errors are allowed, etc., which will not be elaborated here.

[0046] In this embodiment, there are several stirring blades 6, and the several stirring blades 6 are arranged in a staggered manner in the vertical direction, so that the EPP particles can be dispersed, reducing the aggregation and adhesion of EPP particles, etc., improving the cleaning quality of EPP particles, and being able to accelerate the efficiency of removing the dirt attached to the surface of EPP particles; the several stirring blades 6 arranged in a staggered manner can be in a helical upward structure, an orderly staggered upward structure or a disorderly staggered upward structure, etc., as long as it meets the function of hindering the polymerization of EPP particles, which will not be elaborated here.

[0047] In this embodiment, several stirring blades 6 evenly distributed in the circumferential direction of the stirring main shaft 5 at the same height are a group of stirring blades 6, and there are several groups of the stirring blades 6 arranged in the height direction, and the staggered deflection angles of two adjacent groups of stirring blades 6 in the height direction are the same; more specifically, in this solution, a total of three groups of stirring blades 6 are arranged at equal intervals in the height direction of the stirring main shaft 5, and each group of stirring blades 6 includes three stirring blades 6 evenly distributed in the circumferential direction of the stirring main shaft 5, and the staggered deflection angle of two adjacent groups of stirring blades 6 in the height direction is 40°. In this embodiment, the length of the stirring blades in the stirring blades 6 group arranged in a staggered manner in the vertical direction gradually increases from bottom to top; so as to form a structure of several stirring blades 6 evenly distributed in the circumferential direction of the stirring main shaft 5 as shown in Figure 3 ; which is more conducive to the effective dispersion and cleaning of EPP particles in the treatment tank 1.

[0048] In this embodiment, the middle of the stirring blade 6 in the length direction is recessed downward. The recess in this solution makes the stirring blade 6 arc-shaped, and the rising end of the arc faces outward. The so-called "outward" is the end radially away from the stirring main shaft 5, which has the guiding function for EPP particles, so that the EPP particles rise and diffuse outward without being hindered and aggregated in the middle of the treatment tank 1, improving the cleaning effectiveness of EPP particles.

[0049] In this embodiment, the stirring main shaft 5 is provided with a main air inlet channel 7 which is vertically formed in the stirring main shaft 5, and the central axis of the main air inlet channel 7 coincides with the central axis of the stirring main shaft 5; the stirring blade 6 is provided with a diversion channel 8 which is conformally formed along the extending direction of the stirring blade 6 on the stirring blade 6. The main air inlet channel 7 is communicated with an air supply source, the diversion channel 8 is communicated with the main air inlet channel, and the diversion channel 8 is provided with air outlet holes 9 which are formed at the head end of the stirring blade 6. The diversion channel 8 is approximately perpendicular to the main air inlet channel 7 and is formed on the stirring blade 6. The so-called approximate perpendicular means that on the basis of perpendicularity, conformal adjustment is made according to the specific shape of the stirring blade 6, which will not be elaborated here; the air supply source has the ability to make the gas have a certain pressure, so that the gas is discharged from the air outlet holes 9 through the main air inlet channel 7 and the diversion channel 8; through the provided ventilation structure, it is more conducive to the dispersion of EPP particles. Especially in cooperation with the rotation of the stirring mechanism, the blowing direction of the gas is continuously changed, which is beneficial to the dispersion of EPP particles, conducive to obtaining EPP particles with high cleanliness, and the blowing direction is upward, which can accelerate the lifting of EPP particles and improve the cleaning efficiency.

[0050] In this embodiment, dispersion holes 10 with downward blowing directions are further formed in the diversion channel 8 to further improve the dispersion ability of EPP particles; a flow guiding plate 11 is arranged in the diversion channel 8, the flow guiding plate 11 is located outside the dispersion holes 10, and air passing holes 12 are formed in the flow guiding plate 11. The purpose of arranging the flow guiding plate 11 is to guide the gas to be discharged through the dispersion holes 10, and the air passing holes 12 are for the gas to still be discharged from the air outlet holes 9; the dispersion holes 10 are obliquely outwardly inclined from top to bottom, and the flow guiding plate 11 is obliquely outwardly inclined from top to bottom; the design of the dispersion holes 10 in cooperation with the flow guiding plate 11 can enable the stirring blade 6 to have an air passage obliquely outwardly from top to bottom, improve the dispersion effect of EPP particles, reduce the aggregation of EPP particles at the bottom of the stirring main shaft 5, and is beneficial to improving the cleaning efficiency and dispersion efficiency of EPP particles.

[0051] In this embodiment, a diversion channel 8 is correspondingly formed on each of the stirring blades 6 in the set of stirring blades 6 at the bottommost part of the stirring main shaft 5; this is more beneficial to the stability of the air supply pressure and meets the use requirements.

[0052] Through the arranged stirring mechanism, the EPP particles entering the treatment tank 1 can be quickly dispersed. Combining with the ventilation structure, the EPP particles can be dispersed more quickly. At the same time, it can also accelerate the efficiency of removing the dirt attached to the surface of the EPP particles. Combining with the specially structured stirring blades, the rising rate of the EPP particles is increased, with the characteristics of low energy and high efficiency, which can greatly save the cleaning cost. At the same time, the slag storage tank 4 at the bottom of the treatment tank 1 can accumulate more heavier particles, making the efficiency of removing sediment higher.

[0053] The scum-removing and EPP particle cleaning structure includes a slag filtration tank 001 and a filtration mechanism. An inlet II 002 is opened at the top of the slag filtration tank 001. The inlet II is communicated with the outlet I. A valve that can be controlled to open and close is arranged between the inlet II and the outlet I, so as to control the amount of EPP particles transported from the treatment tank to the slag filtration tank. An outlet II 003 is opened at the bottom of the slag filtration tank 001; more preferably, a booster pump can be arranged here to improve the feeding efficiency of the EPP particles, which will not be elaborated here;

[0054] The inlet II 002 is opened on the side wall at the top of the slag filtration tank 001, and the outlet II 003 is opened on the side wall at the bottom of the slag filtration tank 001; and the inlet II 002 and the outlet II 003 are arranged opposite to each other. The inlet II 002 of the slag filtration tank 001 is communicated with the EPP particle feeding channel, so that the EPP particles with assistant powder on the surface are transported to the slag filtration tank 001 for cleaning; the outlet II 003 of the slag filtration tank 001 is communicated with the inlet II 002 of the next-stage treatment process, so that the EPP particles cleaned this time are transported to the preset treatment process.

[0055] In this embodiment, a plurality of slag overflow holes 004 are opened on the side wall of the slag filtration tank 001. The aperture of each slag overflow hole 004 is smaller than the diameter of the EPP particles to be cleaned; so that the floating sundries with smaller particle size can be removed through the slag overflow holes 004, improving the cleanliness of the EPP particles; in the solution, the lowest point of the hole position of the slag overflow hole 004 is not lower than the lowest point of the hole position of the inlet II 002; so that the waste of water source is reduced to the lowest when the floating sundries are cleaned. Further, the cleaning medium with floating objects flowing out through the slag overflow holes 004 can be uniformly collected and then the floating objects are cleaned and reused, reducing the waste of resources and the industrial production cost; more specifically, the plurality of slag overflow holes 004 arranged around the side wall of the slag filtration tank 001 form a group of slag overflow channels, and three groups of slag overflow channels are arranged at intervals in the height direction, increasing the cleaning efficiency of the floating objects, and the slag overflow channels avoid the position of the inlet II 002 so as not to affect the transportation of the EPP particles into the slag filtration tank 001.

[0056] In this embodiment, the filtering mechanism includes a functional screen 005 and a material pushing cover 006. The functional screen 005 is arranged at the top of the feed inlet II 002. The functional screen 005 is provided with screen holes I, and the aperture of the screen holes I is smaller than the diameter of the EPP particles to be cleaned. In this way, the scum smaller than the EPP particles can smoothly pass through the functional screen 005, while the EPP particles cannot smoothly pass through the functional screen 005, achieving the effect of effectively filtering impurities.

[0057] The overflow holes 004 are located at the bottom of the functional screen 005. The bottom of the functional screen 005 is provided with a water baffle 007, and the water baffle 007 is driven to block or cancel the blocking of a plurality of overflow holes 004. By adjusting the water baffle 007, the EPP particles mixed with floating substances can be filtered more purely.

[0058] The water baffle 007 is provided with a functional port 008, and the water baffle 007 is also driven to communicate the functional port 008 with the feed inlet II 002 or the discharge outlet II 003, so as not to affect the transportation of EPP particles into the filter residue tank 001.

[0059] More specifically, the water baffle 007 is fixed at the bottom of the functional screen 005. The center of the top of the functional screen 005 is connected to a rotating shaft 009. The center of the top here refers to the center position at the top in the horizontal plane. The rotating shaft 009 is also connected to the functional screen 005 through connecting wings 010. As shown in the figure, the rotating shaft 009 is connected to the functional screen 005 through a plurality of connecting wings 010. The plurality of connecting wings 010 are evenly distributed in the circumferential direction of the rotating shaft 009, and the connecting wings 010, the rotating shaft 009 and the functional screen 005 form a triangular layout structure, effectively improving the rotation stability and lifting stability.

[0060] The functional screen 005 is driven by the connected rotating shaft 009 to lift and rotate. By driving the lifting of the water baffle 007 through the rotating shaft 009, the water baffle 007 can block or cancel the blocking of a plurality of overflow holes 004. By driving the rotation of the water baffle 007 through the rotating shaft 009, the water baffle 007 can communicate the functional port 008 with the feed inlet II 002 or the discharge outlet II 003. The power source for driving the rotating shaft 009 is achieved by relying on existing technologies, such as motors, etc., which will not be elaborated here.

[0061] In this embodiment, the material pushing cover 006 is arranged inside the functional screen 005. The material pushing cover 006 is located at the top of the feeding port II 002. The material pushing cover 006 is provided with screening holes II, and the aperture of the screening holes II is smaller than the diameter of the EPP particles to be cleaned. In this way, the scum smaller than the EPP particles can smoothly pass through the material pushing cover 006, while the EPP particles cannot smoothly pass through the material pushing cover 006, achieving the effect of effectively filtering impurities. Further, the aperture of the screening holes I is the same as that of the screening holes II, which can meet the filtering requirements, is conducive to production in the same batch, and reduces costs.

[0062] More specifically, the material pushing cover 006 is hidden inside the functional screen 005, and the outer periphery of the material pushing cover 006 generally fits with the inner wall periphery of the slag filter tank 001. The meaning of this general fit is that the two have similar sizes and shapes, so as to achieve a better function of pushing the EPP particles in a predetermined direction, which will not be elaborated here. More accurately, a receiving groove is opened at the center of the rotating shaft 009. The receiving groove penetrates the rotating shaft 009 from top to bottom. A push rod 011 that can be driven to extend or shorten is arranged in the receiving groove. The push rod 011 is connected to the center of the top of the material pushing cover 006. The material pushing cover 006 is driven to lift and lower by the push rod 011. Any one of the existing technologies can be selected for the push rod 011 to achieve the function of lifting and lowering the material pushing cover 006, which will not be elaborated here.

[0063] The material pushing cover 006 is driven to move in the height direction. After a preset amount of EPP particles are introduced into the slag filter tank 001, the feeding can be stopped. At this time, operate the functional screen 005 to move downward and rotate, and the material pushing cover 006 to move downward. On the one hand, the scum is discharged through the overflow hole 004, and on the other hand, the EPP particles are gathered towards the position of the discharge port II 003, so that the discharge port II 003 and the functional hole are aligned, which is conducive to introducing purer EPP particles into the preset process in the later stage. After the EPP particles are completely discharged in the slag filter tank 001, reset the material pushing cover 006 and the functional screen 005, open the feeding port II 002, and continue the above operations to realize the cleaning of the scum mixed in the EPP particles, improve the quality of the EPP particles, improve the product quality, and reduce the rejection rate.

[0064] The structure of the finely washed EPP particles includes a fine washing tank and a fishing mechanism. The bottom of the fine washing tank is provided with a feeding port III, and the feeding port III is communicated with the discharge port II. A valve that can be controlled to open and close is arranged between the feeding port III and the discharge port II, so as to control the amount of EPP particles transported from the slag filter tank to the fine washing tank. The fishing mechanism is used to transfer the EPP particles in the fine washing tank to the post-treatment process. More preferably, a booster pump can be set here to improve the feeding efficiency of the EPP particles, which will not be elaborated here. Any one of the existing fishing devices in the prior art can be selected for the fishing mechanism to achieve the corresponding fishing function, which will not be elaborated here.

[0065] The post-treatment process at least includes a drying process. The fished EPP particles are sent to a drying device, and any one of the existing technologies can be selected for the drying device, which will not be elaborated here. The dried EPP particles can be put into a preset production line for use. In this embodiment, there is the same cleaning medium in the treatment tank 1, the filter residue tank 001 and the fine washing tank. Any suitable cleaning medium in the existing technology can be selected according to the composition of the surface assistant of the EPP particles, and the density of the cleaning medium is greater than the density of the EPP particles, so that the EPP particles can naturally float on the cleaning medium. Generally, the cleaning medium is water, which will not be elaborated here.

[0066] Moreover, the cleaning medium in the fine washing tank can also be recycled and put into use for mixing the EPP particles, which can reduce the waste of resources. Through the multiple impurity removal processes of this embodiment, the cleanliness of the EPP particles can be higher, products with better quality can be obtained, and the yield rate is higher, with less waste of resources.

[0067] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention rather than to limit them. Although the present invention has been described in detail with reference to the preferred embodiments, those of ordinary skill in the art should understand that the technical solutions of the present invention can be modified or equivalently replaced without departing from the purpose and scope of the technical solutions of the present invention, and they should all be covered within the scope of the claims of the present invention.

Claims

1. An EPP particle processing system, characterized in that: It includes a sediment-removing cleaning EPP particle structure, a scum-removing cleaning EPP particle structure, and a fine-washing EPP particle structure; The sediment-removing cleaning EPP particle structure includes a treatment tank and a stirring mechanism. A feed inlet Ⅰ is opened at the bottom of the treatment tank, and the feed inlet Ⅰ is communicated with an EPP particle feeding channel for receiving EPP particles to be cleaned. An outlet Ⅰ is opened at the top of the treatment tank; The stirring mechanism includes a stirring main shaft extending into the treatment tank and stirring blades arranged circumferentially around the stirring main shaft. The stirring main shaft is driven to drive the stirring blades to rotate; The stirring main shaft has a main air inlet channel, and the stirring blades have diversion channels. The main air inlet channel is communicated with an air supply source, the diversion channels are communicated with the main air inlet channel, and air outlet holes are provided on the diversion channels; The scum-removing cleaning EPP particle structure includes a slag filtering tank and a filtering mechanism. A feed inlet Ⅱ is opened at the top of the slag filtering tank, the feed inlet Ⅱ is communicated with the outlet Ⅰ, and an outlet Ⅱ is opened at the bottom of the slag filtering tank; A plurality of slag overflow holes are opened on the side wall of the slag filtering tank, and the aperture of each slag overflow hole is smaller than the diameter of the EPP particles to be cleaned; The filtering mechanism includes a functional screen and a pushing cover. The functional screen is arranged on the top of the feed inlet Ⅱ, and the functional screen has screening holes Ⅰ, and the aperture of the screening holes Ⅰ is smaller than the diameter of the EPP particles to be cleaned; The slag overflow holes are located at the bottom of the functional screen, and a water blocking plate is provided at the bottom of the functional screen. The water blocking plate is driven to block or cancel the blocking of the plurality of slag overflow holes; The water blocking plate has a functional port, and the water blocking plate is also driven to communicate the functional port with the feed inlet Ⅱ or the outlet Ⅱ; The pushing cover is arranged inside the functional screen, the pushing cover is located on the top of the feed inlet Ⅱ, and the pushing cover has screening holes Ⅱ, and the aperture of the screening holes Ⅱ is smaller than the diameter of the EPP particles to be cleaned; The outer circumference of the pushing cover is roughly attached to the inner circumference of the wall of the slag filtering tank, and the pushing cover is driven to move in the height direction; The fine-washing EPP particle structure includes a fine-washing tank and a fishing mechanism. A feed inlet Ⅲ is opened at the bottom of the fine-washing tank, the feed inlet Ⅲ is communicated with the outlet Ⅱ, and the fishing mechanism is used to transfer the EPP particles in the fine-washing tank to the post-treatment process.

2. The EPP particle processing system according to claim 1, characterized in that: It further includes a screening structure. The EPP particles to be cleaned are screened by the screening structure to separate out EPP particles meeting the preset standard; the particle outlet of the screening structure is communicated with the feed inlet Ⅰ through a feeding channel.

3. The EPP particle processing system according to claim 1, wherein: The feed inlet Ⅰ is opened in the middle of the bottom of the treatment tank, and the bottom of the treatment tank is recessed downward to form a slag storage tank; the slag storage tank is in a ring shape surrounding the feed inlet Ⅰ.

4. The EPP particle processing system according to claim 3, wherein: The stirring main shaft is located above the feed inlet Ⅰ, and the central axis of the stirring main shaft substantially coincides with the central axis of the feed inlet Ⅰ; The stirring blades are several pieces, and the several stirring blades are arranged in a staggered manner in the vertical direction.

5. The EPP particle processing system according to claim 4, wherein: Several stirring blades evenly distributed in the circumferential direction of the stirring main shaft at the same height form a set of stirring blade groups, and the set of stirring blade groups are arranged in several groups in the height direction.

6. The EPP particle processing system according to claim 4, wherein: The stirring blades arranged in a staggered manner in the vertical direction gradually increase in length dimension from bottom to top.

7. The EPP particle processing system according to claim 1, characterized in that: The middle part of the stirring blade in the length direction is recessed downward.

8. The EPP particle processing system according to claim 1, wherein: The main air inlet channel is vertically opened on the stirring main shaft, the air outlet holes are opened at the leading ends of the stirring blades, and the shunt channel is approximately perpendicularly opened on the stirring blades with respect to the main air inlet channel; Dispersion holes with downward air outlet directions are also opened in the shunt channel; a diversion plate is arranged in the shunt channel, the diversion plate is located outside the dispersion holes, and air passing holes are opened on the diversion plate; the dispersion holes are obliquely outwardly inclined from top to bottom, and the diversion plate is obliquely outwardly inclined from top to bottom.

9. The EPP particle processing system according to claim 1, wherein: The feed inlet II is opened on the top side wall of the filter residue tank, and the discharge outlet II is opened on the bottom side wall of the filter residue tank; the lowest point of the overflow residue hole is not lower than the lowest point of the feed inlet II.

10. The EPP particle processing system according to claim 1, wherein: The water baffle is fixed to the bottom of the functional screen, the center of the top of the functional screen is connected to a rotating shaft, and the rotating shaft is also connected to the functional screen through connecting wings; The functional screen is driven by the connecting rotating shaft to lift and rotate; a receiving groove is opened in the center of the rotating shaft, the receiving groove penetrates the rotating shaft from top to bottom, a push rod that is driven to extend or contract is arranged in the receiving groove, the push rod is connected to the center of the top of the material pushing cover, and the material pushing cover is driven to lift by the push rod.

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