A linear grading screen with a wet distributor

Abstract

The present invention relates to the field of slag treatment devices after incineration in garbage power plants, a linear grading screen with a wet distributor, wherein the water storage tank is a long strip box with a square cross section, the upper half of the first side surface in the length direction of the water storage tank is hollowed out, the lower half of the first side surface in the length direction of the water storage tank is a top overflow plate, the drainage end of the water inlet pipe is arranged in the water storage tank, the first end in the length direction of the bottom discharge plate is connected to the outer side wall of the top overflow plate, the bottom discharge plate extends in an oblique downward direction away from the water storage tank, the bottom discharge plate is provided with a discharge hollow formed by hollowing out, the lower end of the bottom discharge plate forms a discharge opening, and the lower discharge end of the feed hopper faces the bottom discharge plate; the wet distributor is installed above the linear grading screen, so that the material discharged by the wet distributor falls at the starting position of the screening surface. The linear grading screen can clean the material again and improve the sorting rate of non-ferrous metals.

Description

Technical Field

[0001] The invention relates to the field of slag treatment devices after incineration in garbage power plants, in particular to a linear grading screen with a wet distributor. Background Art

[0002] Generally, the slag is directly processed into a linear grading screen, and then the particle size is graded. The material jumps forward along a straight line, gradually disperses in the process, and is distributed in a fan-shaped manner on the linear grading screen surface. The slag passes through the linear grading screen plate according to the particle size and falls into the corresponding pipeline step by step to enter the next process. First, the use of slag varies according to the particle size. Second, since the material contains a large amount of non-ferrous metals such as copper and aluminum, it can be sorted and recycled by material diameter using an eddy current separator. Therefore, it is particularly important to better grade the material particle size.

[0003] Because the materials are not pre-treated during traditional feeding and cannot be evenly dispersed on the screen surface, the material layer in the middle is often thick and the material layer at both ends is thin. The materials cannot fully contact the screen surface, and the material particles cannot fall into the corresponding pipe according to the size of the screen gap. Some small-sized materials are mixed with large-sized materials. There will be a lot of mud and sand attached to the surface of the material, which seriously affects the recovery of non-ferrous metals such as copper and aluminum in the eddy current separator during the extraction of non-ferrous metals. The sorting rate is greatly reduced. These non-ferrous metal materials are mixed in the slag raw materials, which will also affect the quality of slag brick making. Both the sorting of non-ferrous metals and the slag brick making bring great difficulties. Summary of the invention

[0004] In order to solve the above problems, the present invention proposes a linear grading screen with a wet distributor, which can clean the material again, improve the sorting rate of non-ferrous metals, and thus greatly improve the quality of subsequent slag brick making.

[0005] To achieve the above object, the technical solution adopted by the present invention is:

[0006] A linear grading screen with a wet distributor comprises a wet distributor and a linear grading screen, wherein the linear grading screen has a screening surface, the wet distributor comprises an inlet hopper, a water inlet pipe, a water storage tank, a top overflow plate and a bottom discharge plate, wherein the water storage tank is a long strip-shaped box body with a square cross-section, the upper half of the first side surface in the length direction of the water storage tank is hollowed out, the lower half of the first side surface in the length direction of the water storage tank is the top overflow plate, the drainage end of the water inlet pipe is arranged in the water storage tank, the length of the bottom discharge plate matches the length of the water storage tank, the first end in the length direction of the bottom discharge plate is connected to the outer side wall of the top overflow plate, the bottom discharge plate extends in an oblique downward direction away from the water storage tank, the bottom discharge plate is provided with a discharge hollow formed by hollowing out, the lower end of the bottom discharge plate forms a discharge opening, the inlet hopper is arranged above the bottom discharge plate, the lower part of the inlet hopper is the discharge end, and the discharge end of the inlet hopper faces the bottom discharge plate;

[0007] The wet distributor is installed above the linear grading screen, and the discharge hollow and discharge opening of the wet distributor correspond to the starting position of the linear grading screen, so that the material discharged by the wet distributor falls on the starting position of the screening surface.

[0008] Preferably, at least two groups of discharge hollows are provided on the bottom discharge plate of the wet distributor, and two adjacent groups of discharge hollows are arranged at staggered positions in the direction of material movement.

[0009] Preferably, there are two groups of discharge hollows, namely rear discharge hollows and front discharge hollows, and both the rear discharge hollows and front discharge hollows are strip-shaped hollows opened along the length direction of the bottom discharge plate.

[0010] Preferably, among the rear discharge discharge hollowings, the length of a single strip hollowing is greater than the spacing between two adjacent strip hollowings; and among the rear discharge discharge hollowings, the length of a single strip hollowing is greater than the spacing between two adjacent strip hollowings.

[0011] Preferably, the water inlet pipe passes through the side wall of the water tank, the first end of the water inlet pipe located outside the water tank is provided with a flange joint, and the second end of the water inlet pipe located inside the water tank is arranged below the top edge of the top overflow plate.

[0012] Preferably, the second end of the water inlet pipe is arranged toward the bottom wall of the water tank.

[0013] Preferably, the wet distributor also includes a bracket and a crossbeam, there are two brackets, and the two brackets are respectively installed on both sides of the width direction of the starting position of the linear grading screen passing through the screen surface, the crossbeam is connected to the top of the two brackets, and the wet distributor is installed on the crossbeam and is erected above the linear grading screen through the crossbeam.

[0014] Preferably, the length of the wet distributor is not greater than the width of the screen surface of the linear grading screen.

[0015] Preferably, the length of the bottom discharge plate matches the length of the water storage tank, and the width of the discharge end of the hopper matches the length of the bottom discharge plate.

[0016] Preferably, the screening surface of the linear grading screen is provided with four sections arranged sequentially along the material moving direction, wherein the first section is a blind plate, the wet distributor is arranged above the first section, the second section is a 2mm slit sieve plate, the third section is a 6mm slit sieve plate, and the fourth section is a sieve plate larger than 30mm.

[0017] The beneficial effects of using the present invention are:

[0018] The patent of this invention relates to the particle size classification of slag after incineration in waste power plants in the field of environmental protection. The slag is pretreated before entering the linear grading screen to make the slag evenly distributed. The slag material is grouped by the linear grading screen, and then non-ferrous metals are sorted. The sorting effect is significantly improved, bringing economic benefits to society. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a schematic structural diagram of a linear grading screen with a wet distributor according to the present invention.

[0020] Figure 2 It is a cross-sectional view of a wet distributor in a linear grading screen with a wet distributor according to the present invention.

[0021] Figure 3 It is a top view of the wet distributor body in the linear grading screen with a wet distributor of the present invention.

[0022] Figure 4 It is a schematic diagram of the axial side of the wet distributor in the linear grading screen with a wet distributor of the present invention.

[0023] Figure 5 It is a schematic diagram of the screen stage of the linear grading screen in the linear grading screen with a wet distributor of the present invention.

[0024] Reference numerals include:

[0025] 1-wet distributor, 11-feed hopper, 12-water inlet pipe, 13-water storage tank, 14-top overflow plate, 15-front baffle, 16-bottom discharge plate, 17-rear discharge hollow, 18-front discharge hollow, 19-discharge opening, 110-bracket, 111-crossbeam, 112-flange joint, 2-linear grading screen. DETAILED DESCRIPTION

[0026] In order to make the purpose, technical solution and advantages of the technical solution more clear, the technical solution is further described in detail below in conjunction with specific implementation methods. It should be understood that these descriptions are only exemplary and are not intended to limit the scope of the technical solution.

[0027] like Figure 1-Figure 5 As shown, this embodiment proposes a linear grading screen 2 with a wet distributor 1, comprising a wet distributor 1 and a linear grading screen 2, wherein the linear grading screen 2 has a screening surface, the wet distributor 1 comprises an inlet hopper 11, a water inlet pipe 12, a water storage tank 13, a top overflow plate 14 and a bottom discharge plate 16, wherein the water storage tank 13 is a long strip box with a square cross section, the upper half of the first side surface of the length direction of the water storage tank 13 is hollowed out, the lower half of the first side surface of the length direction of the water storage tank 13 is the top overflow plate 14, the drainage end of the water inlet pipe 12 is arranged in the water storage tank 13, the length of the bottom discharge plate 16 matches the length of the water storage tank 13, and the length of the bottom discharge plate 16 is square. The first end is connected to the outer side wall of the top overflow plate 14, and the bottom discharge plate 16 extends in an oblique downward direction away from the water tank 13. The bottom discharge plate 16 is provided with a discharge hollow formed by hollowing out, and the lower end of the bottom discharge plate 16 forms a discharge opening 19. The feed hopper 11 is arranged above the bottom discharge plate 16, and the lower part of the feed hopper 11 is the discharge end, and the discharge end of the feed hopper 11 faces the bottom discharge plate 16; the wet distributor 1 is installed above the linear grading screen 2, and the discharge hollow and discharge opening 19 of the wet distributor 1 correspond to the starting position of the screening surface of the linear grading screen 2, so that the material discharged by the wet distributor 1 falls at the starting position of the screening surface.

[0028] In this embodiment, the wet distributor 1 also includes a bracket 110 and a crossbeam 111. There are two brackets 110, and the two brackets 110 are respectively installed on both sides of the width direction of the starting position of the screening surface of the linear grading screen 2. The crossbeam 111 is connected to the top of the two brackets 110. The wet distributor 1 is installed on the crossbeam 111 and is erected above the linear grading screen 2 through the crossbeam 111.

[0029] Specifically, the bracket 110 is a ladder structure, the height of the bracket 110 matches the height of the starting end of the linear grading screen 2, there are two crossbeams 111, the two crossbeams 111 are respectively overlapped at the front end and the rear end of the bracket 110, the two crossbeams 111 are arranged in parallel at the same height, and the back of the water storage tank 13 is fixedly mounted on the rear crossbeam 111. Figure 2 As shown, the upper half of the first side surface in the length direction of the water tank 13 is hollowed out, the front of the top plate of the water tank 13 extends forward and protrudes from the first side surface of the fixed plate, and the front of the top plate of the water tank 13 is then bent downward to form a front baffle 15. The position of the free end edge of the lower end of the front baffle is lower than the height of the free end edge of the top overflow plate 14, so a water passage is formed between the top overflow plate 14 and the front baffle 15.

[0030] When the device is used, water is discharged into the water tank 13 through the water inlet pipe 12, and the water flow slowly accumulates in the water tank 13. When the liquid level of the water in the water tank 13 is greater than the top overflow plate 14, the water body smoothly and evenly overflows from the top free edge of the top overflow plate 14. It can be understood that the top free edge of the top overflow plate 14 is in a horizontal state, so that the water flow is in a uniform overflow state in the length direction of the top free edge of the top overflow plate 14. In this process, the front baffle 15 has the effect of blocking the water flow from directly impacting the discharge hollow, and a water outlet is formed between the front baffle 15 and the top overflow plate 14.

[0031] Slag material is fed from the feed hopper 11 to the bottom discharge plate 16, and water overflowing from the water storage tank 13 is mixed with the slag material entering from the feed port through the water outlet to form a mixture, and the mixture partially passes through the discharge hollow and falls into the linear grading screen 2 through the discharge hollow, and the remaining mixture passes through the discharge opening 19 and falls into the linear grading screen 2, so that the material is loosely and evenly distributed on the surface of the linear grading screen 2.

[0032] The following is a detailed description of the present discharge hollowing. At least two groups of discharge hollowing are provided on the bottom discharge plate 16 of the wet distributor 1, and two adjacent groups of discharge hollowing are arranged at staggered positions in the direction of material movement. At this time, the mixture can be dispersed as much as possible through the discharge hollowing to form a loose slag material.

[0033] There are two groups of discharge hollows, namely, rear discharge hollows 17 and front discharge hollows 18, which are strip hollows opened along the length direction of the bottom discharge plate 16. In this embodiment, the rear discharge hollows 17 and the front discharge hollows 18 are both runway-shaped to intercept more materials.

[0034] In the rear discharge material discharging hollow 17, the length of a single strip hollow is greater than the distance between two adjacent strip hollows; in the rear discharge material discharging hollow 17, the length of a single strip hollow is greater than the distance between two adjacent strip hollows, so as to intercept more materials.

[0035] The water inlet pipe 12 passes through the side wall of the water storage tank 13, and the first end of the water inlet pipe 12 located outside the water storage tank 13 is provided with a flange joint 112, and the second end of the water inlet pipe 12 located inside the water storage tank 13 is arranged below the top edge of the top overflow plate 14. The water inlet pipe 12 can be connected to the external pressure water pipe through the flange joint 112 to realize the input of water flow.

[0036] Preferably, the second end of the water inlet pipe 12 is arranged toward the bottom wall of the water tank 13, so that the water flow output by the water inlet pipe 12 can enter the water tank 13 more smoothly, and at the same time, the water flow output by the top overflow plate 14 is also relatively smooth and uniform.

[0037] It is understandable that the length of the wet distributor 1 is not greater than the width of the screen surface of the linear grading screen 2. The length of the bottom discharge plate 16 matches the length of the water storage tank 13, and the width of the discharge end of the hopper 11 matches the length of the bottom discharge plate 16.

[0038] like Figure 5 As shown, the screening surface of the linear grading screen 2 is provided with four sections arranged in sequence along the material moving direction, wherein the first section is a blind plate, the wet distributor 1 is arranged above the first section, the second section is a 2mm slit sieve plate, the third section is a 6mm slit sieve plate, and the fourth section is a sieve plate larger than 30mm.

[0039] Specifically, the grading screen is divided into four sections along the direction of material movement. The first section is a blind plate, where the material falls in and the wet distributor 1 is installed. The second section is a 2mm slit screen plate. Sediment smaller than 2mm falls into this section and enters the sedimentation tank for recycling. The third and fourth sections are materials larger than 2mm. After being sprayed and flushed, they enter the eddy current separator for non-ferrous metal separation. The third section is a 6mm slit screen plate, and the fourth section is a >30mm screen plate. The eddy current separator can separate metal particles.

[0040] Eddy current separator is an effective method for recycling nonferrous metals. It has the advantages of excellent separation effect, strong adaptability, reliable mechanical structure, high separation efficiency and large processing capacity, which can separate metal particles from the remaining slag materials except metal particles.

[0041] The above contents are only preferred embodiments of the present invention. For ordinary technicians in this field, many changes can be made in the specific implementation methods and application scopes based on the ideas of the present technical content. As long as these changes do not deviate from the concept of the present invention, they all fall within the scope of protection of this patent.

Claims

1. A linear grading screen with a wet distributor, characterized in that: It comprises a wet distributor and a linear grading screen, wherein the linear grading screen has a screening surface, the wet distributor comprises an inlet hopper, a water inlet pipe, a water storage tank, a top overflow plate and a bottom discharge plate, wherein the water storage tank is a long strip-shaped box body with a square cross section, the upper half of the first side surface in the length direction of the water storage tank is hollowed out, the lower half of the first side surface in the length direction of the water storage tank is the top overflow plate, the drainage end of the water inlet pipe is arranged in the water storage tank, the length of the bottom discharge plate matches the length of the water storage tank, the first end in the length direction of the bottom discharge plate is connected to the outer side wall of the top overflow plate, the bottom discharge plate extends in an oblique downward direction away from the water storage tank, the bottom discharge plate is provided with a discharge hollow formed by hollowing out, the lower end of the bottom discharge plate forms a discharge opening, the inlet hopper is arranged above the bottom discharge plate, the lower part of the inlet hopper is the discharge end, and the discharge end of the inlet hopper faces the bottom discharge plate; The wet distributor is installed above the linear grading screen, and the material discharging hollow and material discharging opening of the wet distributor correspond to the starting position of the screen surface of the linear grading screen, so that the material discharged by the wet distributor falls on the starting position of the screen surface; The bottom discharge plate of the wet distributor is provided with at least two groups of discharge hollows, and two adjacent groups of discharge hollows are arranged at staggered positions in the direction of material movement; The wet distributor also includes a bracket and a crossbeam. There are two brackets, and the two brackets are respectively installed on both sides of the width direction of the starting position of the linear grading screen passing through the screen surface. The crossbeam is connected to the top of the two brackets. The wet distributor is installed on the crossbeam and is erected above the linear grading screen through the crossbeam.

2. The linear grading screen with a wet distributor according to claim 1, characterized in that: There are two groups of discharging hollows, namely rear discharging hollows and front discharging hollows. Both the rear discharging hollows and front discharging hollows are strip-shaped hollows opened along the length direction of the bottom discharging plate.

3. The linear grading screen with a wet distributor according to claim 2, characterized in that: Among the rear discharge hollowings, the length of a single strip hollowing is greater than the distance between two adjacent strip hollowings.

4. The linear grading screen with a wet distributor according to claim 1, characterized in that: The water inlet pipe passes through the side wall of the water tank, the first end of the water inlet pipe located outside the water tank is provided with a flange joint, and the second end of the water inlet pipe located inside the water tank is arranged below the top edge of the top overflow plate.

5. The linear grading screen with a wet distributor according to claim 4, characterized in that: The second end of the water inlet pipe is arranged toward the bottom wall of the water storage tank.

6. The linear grading screen with a wet distributor according to claim 1, characterized in that: The length of the wet distributor is not greater than the width of the screen surface through which the linear grading screen passes.

7. The linear grading screen with a wet distributor according to claim 1, characterized in that: The length of the bottom discharge plate matches the length of the water storage tank, and the width of the discharge end of the feed hopper matches the length of the bottom discharge plate.

8. The linear grading screen with a wet distributor according to claim 1, characterized in that: The screening surface of the linear grading screen is provided with four sections arranged in sequence along the material moving direction, wherein the first section is a blind plate, the wet distributor is arranged above the first section, the second section is a 2mm slit sieve plate, the third section is a 6mm slit sieve plate, and the fourth section is a sieve plate larger than 30mm.

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