CN217104494U - Conveying system and disc thickener - Google Patents

Abstract

The utility model discloses a conveying system and disk thickener, conveying system are for advancing the pipeline of thick liquid or/and this dressing trough of evacuation in to the dressing trough, conveying system is including disposing in the siphonozooid under this dressing trough or the side below, and this siphonozooid includes: the slurry inlet or/and the emptying port, a main pipe inner cavity communicated with the slurry inlet or/and the emptying port and at least two first openings are arranged on the side wall of the tubular body at intervals, communicated with the main pipe inner cavity and respectively communicated to second openings arranged right below or below the slurry tank, and the second openings correspond to the first openings one by one; the slurry introduced into the inner cavity of the main pipe from the slurry inlet is conveniently conveyed to the slurry tank, or/and the material in the slurry tank is conveniently introduced into the inner cavity of the main pipe and then discharged from the emptying port.

Description

Conveying system and disc thickener

Technical Field

The utility model relates to a thick liquids are concentrated technical field, especially relate to a conveying system and concentrated machine of disk that is used for advancing thick liquid or evacuation dressing trough to the dressing trough.

Background

A multi-disc thickener is a pulp thickener, and generally includes a pulp tank 1 and a hollow shaft 2 penetrating through the pulp tank 1, wherein a plurality of discs 3 are axially arranged on the hollow shaft 2, each disc 3 is composed of a plurality of hollow fan blades communicated with the hollow shaft 2, and a filter screen is arranged on each hollow fan blade.

The working principle is as follows: when the multi-disc thickener rotates, slurry is conveyed to the slurry tank 1, the disc 3 is driven by the motor to rotate along with the shaft and is gradually immersed in the pulp suspension, the separation of the slurry is realized by the filter screen on the hollow fan blade, water in the slurry passes through the filter screen and flows to the vacuum box through the hollow shaft 2, and fibers in the slurry are intercepted on the surface of the hollow fan blade to form a slurry layer; at the moment, vacuum is gradually formed in the water leg, a pulp layer adsorbed on the surface of the disc 3 is thinner, a large amount of solid matters of fine fibers and fillers still exist in the filtered filtrate, and the concentration of the filtrate is higher; with the continuous operation of the disc 3, the pulp layer on the disc 3 gradually becomes thicker, and at the moment, the pulp layer has good filtering effect and can intercept a large amount of fine solid matters, and the quality of the filtrate is gradually improved to form clear filtrate; the pulp layer is gradually thickened along with the continuous rotation of the hollow fan, when the hollow fan rotates out of the liquid surface, clear filtrate is continuously dewatered under the action of vacuum, the dryness of the pulp layer is further improved, and then the pulp layer enters an atmospheric region, when pulp stripping water peels off the edge of the hollow fan, the pulp layer forms self-rolling under the action of self gravity, so that the pulp layer falls into a vertical chute between two adjacent discs 3 and is conveyed into a pulp tank through a screw, and the concentration and recovery of fibers are realized.

However, most of the pulp inlet systems 4 of the existing multi-disc thickener are all fed from the side of the stock chest 1, the pulp flowing performance in the stock chest 1 is poor due to the pulp inlet mode, and fibers and impurities in the pulp can be accumulated at the bottom of the stock chest 1 after a long time, and the accumulation of the impurities can obstruct the rotation of the disc 3, damage the disc 3 or increase the energy consumption; in addition, because of the operability, the number of the slag discharging ports 6 arranged at the bottom of the stock chest 1 is limited, when the machine stops running and is overhauled, the stock chest 1 needs to be emptied, at the moment, the pulp in the whole stock chest 1 flows as shown by the arrow direction in fig. 1, and intensively gushes out from the slag discharging ports 6 under the action of gravity, which undoubtedly can generate transverse impact on the adjacent discs 3, and bend or damage the discs 3.

SUMMERY OF THE UTILITY MODEL

One of the purposes of the utility model is to provide a conveying system for feeding pulp into a stock chest, which can disturb the paper pulp at the bottom of the stock chest, avoid the fibers and impurities in the paper pulp from accumulating at the bottom of the stock chest, obstruct the rotation of the disk and increase the energy consumption, thereby reducing the damage to the disk;

another object of the present invention is to provide a conveying system for emptying a slurry tank, which can discharge slurry in the slurry tank in a dispersing manner during the emptying process, and is safe and fast, thereby reducing damage to the disk due to lateral impact;

another object of the utility model is to provide a conveying system for advancing thick liquid and this dressing trough of evacuation to the dressing trough, this conveying system can not only reduce the production of rotten thick liquid and the damage of impurity to the disc, but also can reduce the produced destruction of thick liquids to the transverse impact of disc at the dressing trough evacuation in-process.

The object of the utility model is achieved by the initially defined conveying system with novel structure, which is used for feeding slurry or/and emptying the slurry tank into the slurry tank, comprising a tubular body arranged under or laterally under the slurry tank, wherein the tubular body comprises a slurry inlet or/and an emptying port, a main pipe inner cavity and at least two first openings, and the main pipe inner cavity is communicated with the slurry inlet or/and the emptying port; the first openings are arranged on the side wall of the tubular body at intervals, communicated with the inner cavity of the main pipe and respectively communicated with second openings arranged right below or side below the stock chest, and the second openings correspond to the first openings one by one; the conveying system can convey the pulp introduced into the inner cavity of the main pipe from the pulp inlet to the pulp tank through the first opening and the second opening in sequence, or/and introduce the materials in the pulp tank into the inner cavity of the main pipe through the second opening and the first opening in sequence, and then discharge the materials from the emptying port, which means that when the conveying system is provided with the pulp inlet, the pulp can enter the pulp from the bottom or the lateral lower part of the pulp tank through the first openings arranged on the side wall of the tubular body at intervals, and the pulp entering mode can disturb the pulp at the bottom of the pulp tank, prevent fibers and impurities in the pulp from accumulating at the bottom of the pulp tank, hinder the rotation of a disc, increase the energy consumption, or destroy fan blades; when the conveying system is provided with the emptying port, materials in the slurry tank can be dispersedly discharged through the second openings correspondingly arranged with the first openings, so that the slurry tank can be ensured to be safe and quick in the emptying process, and large transverse impact on the fan blades can be avoided; when the conveying system is provided with the slurry inlet and the emptying port at the same time, the damage of the disk caused by the impact of the materials when impurities are accumulated and emptied can be simultaneously solved. It is within the scope of the present invention that the manifold cavity may have any shape, but it is presently preferred that it be substantially overall length, preferably with the tubular body having a uniform thickness.

According to one embodiment, the first opening has an area A and the manifold lumen defines a passage having a cross-sectional area B, wherein 2.25A ≦ B ≦ 4A. If the opening is too small, the slurry inlet amount is insufficient when the slurry inlet is used for feeding slurry, the disturbance to the bottom of the slurry tank is small, the problem of slurry accumulation still exists, and the time consumption is too long and the efficiency is low no matter the slurry inlet is used for emptying; if it is too large, there will still be a problem of hitting the disc due to the high velocity of the outflow of the material in the vat. Preferably, B > 3.5A. Therefore, the disturbance to the bottom of the stock tank can be realized while the delivered stock per unit time is not reduced remarkably; or the uniform speed and slow flow during discharging are realized, and the impact of the materials on peripheral disks is reduced.

According to one embodiment, a branch pipe is communicated between the first opening and the second opening. From this, can play the effect of direction and buffering to the evacuation of the transport of thick liquids or material the utility model discloses in, the branch pipe is preferably the straight tube to better feeding or row material.

According to one embodiment the length of the branch pipes is 180mm-200mm, preferably 190 mm. When the length of the branch pipe is less than 180mm, the installation space is small, it is inconvenient to install (for example, weld) the two ends of the branch pipe on the first opening and the second opening, and if the length of the branch pipe is greater than 200mm, the overall space height of the equipment is increased, the pumping energy consumption is increased, and meanwhile, the blocking probability inside the branch pipe is improved.

According to one embodiment, the central axis of the branch pipe has an angle a of 45 ° -135 ° to the horizontal plane. In the present application, the angle α is an angle between the central axis of the branch pipe and a horizontal plane when the stock chest is placed horizontally, and may be an angle between the central axis of the branch pipe and a horizontal plane of the central axis of the stock chest. If the angle alpha is less than 45 deg. or more than 135 deg., this means that there is a greater resistance to the flow of material from the second opening into the branch pipe, or to the overflow of pulp from the first opening through the branch pipe to the vat, which is detrimental to the feeding and discharge of pulp.

According to one embodiment, the tubular body is arranged directly below the vat, and the centre axis of the branch pipe is arranged perpendicular to the horizontal plane. In this case, as a preferred scheme, the pipe wall of the branch pipe has the minimum resistance no matter the slurry is fed or discharged, and accordingly, the energy consumption in the slurry feeding process can be reduced.

According to one embodiment, the tubular body is arranged below the side of the slurry tank, and the angle between the central axis of the branch pipe and the horizontal plane is 45 DEG alpha-75 DEG or 105 DEG alpha-135 deg. When the branch pipe is arranged at the side of the stock chest, in order to avoid the stock chest, a is set to be less than or equal to 75 ° or a is set to be greater than or equal to 105 °, although the specific avoidance angle can be adjusted according to the actual situation, if a is less than 45 ° or a is greater than 135 °, the pipe wall of the branch pipe generates a certain resistance to the material, which is not favorable for slurry feeding and discharging.

According to one embodiment, the tubular body further comprises a purge port communicating with the inner cavity of the manifold, the purge port being disposed on an opposite side of the drain port. For example, when the drain is provided at one end of the tubular body, the purge port is provided at the other end of the tubular body. Therefore, when the emptying port is opened, materials are gathered into the main pipe inner cavity through the first openings and are uniformly discharged through the emptying port, the discharge pressure of the stock chest can be greatly reduced, the concentrated discharge of the emptying port is convenient for subsequent treatment of the materials, in addition, the cleaning port is arranged on the opposite side of the cleaning port and the emptying port, and when the emptying port is blocked, cleaning liquid is injected into the main pipe inner cavity through the cleaning port, so that the blockage can be conveniently cleaned.

According to one embodiment, said slurry inlet is provided in a side wall of said tubular body, said slurry inlet being provided opposite said first opening. From this, the thick liquids not only can overflow to first opening more conveniently, but also can make the thick liquids in the house steward inner chamber of siphonozooid be in mobile state, avoid producing rotten thick liquid. Preferably, the slurry inlet is provided with a plurality of slurry inlets, and the slurry inlets are arranged at intervals.

According to one embodiment, a tee is provided on a sidewall of the tubular body, the tee being disposed relative to the first opening, comprising:

the connecting pipe orifice is communicated with the inner cavity of the main pipe;

a first port forming the slurry inlet;

and the second port is arranged opposite to the first port to form the evacuation port.

According to one embodiment, the slurry inlet and the emptying port are respectively provided with a gate valve.

The utility model discloses still relate to including the disc thickener of dressing trough, the axial is equipped with a plurality of interval arrangement's disc in the dressing trough, forms the chute between two adjacent discs, the second opening corresponds to the chute is seted up in the diapire or the lateral wall below of dressing trough, disc thickener includes foretell conveying system, conveying system's first opening is connected to on the second opening.

According to one embodiment, the second opening opens below the side wall of the vat, the height of the second opening being no greater than the bottom edge of the disc. At the disk place of arrival, all can produce the disturbance to the thick liquids in the dressing trough, consequently, rotten thick liquid produces more between the diapire of dressing trough and the bottom edge that is close to the disk, sets up the bottom edge that the height of second open-ended is not more than the disk, even with the second opening setting on the lateral wall of dressing trough, also can be when advancing the thick liquid to the blind spot production disturbance of dressing trough, avoid rotten thick liquid's production, simultaneously, also be convenient for the evacuation fast under the effect of material gravity.

According to one embodiment, each chute has a corresponding second opening, and the first openings of the conveying system are in a one-to-one correspondence with the second openings. The chutes, the first openings and the second openings are arranged in a one-to-one corresponding relationship, so that slurry can be fed into each chute simultaneously, or materials in each chute area can be discharged simultaneously, therefore, the working efficiency of the disc thickener can be improved, and the damage to discs is reduced to the maximum extent.

According to one embodiment, the conveying system comprises a multi-section tubular body, each section of said tubular body being provided on opposite sides thereof with a tee and at least one of said first openings, respectively, said tee comprising:

the connecting pipe orifice is communicated with the inner cavity of the main pipe;

a first port forming the slurry inlet;

and the second port is arranged opposite to the first port to form the evacuation port.

When the stock chest is too big, set up the tubulose body segmentation, can shorten the length of tubulose body, be convenient for production and manufacturing can reduce the bending loss of tubulose body simultaneously.

According to one embodiment, the tubular body is axially arranged directly below or laterally below the vat, and the length of the tubular body is not less than the axial length of the vat.

Drawings

Embodiments of the invention will now be described in more detail with respect to the accompanying drawings, in which:

FIG. 1 is a schematic diagram of the location of a slurry inlet system and a slag discharge port of a prior art multiple pan thickener;

fig. 2 is a cross-sectional view of a first embodiment of a delivery system according to the present invention;

FIG. 3 is a cross-sectional view of a multiple disc concentrator including the delivery system shown in FIG. 2;

FIG. 4 is a cross-sectional view of the multiple disc concentrator of FIG. 3;

FIG. 5 is a perspective view of the multiple disc concentrator of FIG. 3;

figure 6 is a cross-sectional view of a second embodiment of a delivery system according to the present invention;

figure 7 is a cross-sectional view of a third embodiment of a delivery system according to the present invention;

figure 8 is a cross-sectional view of a multiple disc thickener including a fourth embodiment of the delivery system of the present invention;

figure 9 is a perspective view of a multiple disc concentrator including a fifth embodiment of the delivery system of the present invention.

Detailed Description

Fig. 2 shows a first embodiment of a conveying system for feeding and emptying a vat according to the invention. The delivery system comprises a tubular body 100 arranged directly below the vat (e.g. 1 of fig. 3), the tubular body 100 comprising a slurry inlet 101 and a drain 102, a manifold lumen (e.g. 103 of fig. 4) and a plurality of first openings 104.

Fig. 3 shows a cross-sectional view of a multi-disk thickener, fig. 4 shows a cross-sectional view of the multi-disk thickener, the multi-disk thickener comprises a slurry tank 1 and a conveying system shown in fig. 2, a plurality of disks 3 arranged at intervals are axially arranged in the slurry tank 1, a chute is formed between every two adjacent disks 3, second openings 105 corresponding to the first openings 104 one by one are correspondingly formed in the bottom wall of the slurry tank 1 right below the chute, a tubular body 100 is axially arranged right below the slurry tank 1, and the first openings 104 of the conveying system are respectively and correspondingly connected to the second openings 105.

The tubular body 100 is shown in detail in fig. 2 and 3, and is a pipe made of corrosion-resistant material (preferably stainless steel) suitable for the purpose, the length of the tubular body 100 is not less than the axial length of the slurry tank 1, the main pipe inner cavity 103 can have any shape, but is preferably substantially longitudinal, in this embodiment, the tubular body 100 has a uniform thickness, the main pipe inner cavity 103 axially penetrates the tubular body 100 and is communicated with the slurry inlet 101 and the drain 102, the first openings 104 are arranged on the side wall of the tubular body 100 at intervals and are communicated with the main pipe inner cavity 103, and the free ends of the first openings 104 are respectively communicated with the second openings 105 on the bottom wall of the slurry tank through the branch pipes 106. Therefore, as indicated by an arrow x1 in fig. 3, when the emptying port 102 is closed, the conveying system can convey the slurry introduced into the inner cavity 103 of the main pipe through the slurry inlet 101 to the slurry tank 1 through the first opening 104 and the second opening 105 in sequence, so that the slurry overflows from the bottom of the slurry tank 1, and the generation of slurry and the damage of accumulated impurities to the rotating disk 3 are avoided; or as indicated by an arrow x2 in fig. 3, on the premise of closing the slurry inlet 101, the material in the slurry tank 1 is sequentially introduced into the main pipe inner cavity 103 through the second opening 105 and the first opening 104, and then is discharged dispersedly from each emptying port 102 arranged corresponding to the chute, so that a large amount of material is prevented from flowing out to the concentrated slag discharge port, and a large impact is generated on the adjacent fan blade 2, and the fan blade is damaged.

Fig. 5 shows the installation position of the conveyor system on the trough, the tubular body 100 of the conveyor system is arranged parallel to the hollow shaft 2 of the trough 1 and directly below the trough, the trough 1 is arranged horizontally, the plane of the hollow shaft 2 has an axis L1, each branch pipe 106 is arranged perpendicular to the tubular body 100 and has an axis L2 parallel to each other, and an angle a of 90 ° is formed between L1 and L2, so that the material flows between the chute and the tubular body 100 straight up and down, no matter whether the material is fed or emptied, the resistance is minimal, and the damage to the fan blades 3 is minimal.

In this embodiment, the first opening 104 has an area A and the manifold lumen 103 defines a passage having a cross-sectional area B, where 2.25A B4A, in this particular embodiment B3.5A, although the cross-sectional area of the branch 106 should not be less than area A, and preferably should be the same as the area of the first opening 104. The total length of the branch pipe 106 is set to 190mm, the branch pipe 106 may be integrally formed on the first opening 104, and when the branch pipe is installed at a later stage, the length of 190mm may enable the free end of the branch pipe 106 to be welded on the second opening 105 through a welding mode. Of course, in consideration of installation convenience, the branch pipe 106 may be provided in multiple sections, any two sections of the branch pipe are welded to the first opening 104 and the second opening 105, and then the remaining branch pipe sections are flanged with each other by bolts and gaskets to finally form the complete branch pipe 106. If only two branch pipe sections are arranged, the free ends of the two straight pipe sections respectively arranged on the first opening 104 and the second opening 105 are connected by flanges through bolts and gaskets, and then the complete branch pipe 106 can be formed.

In this embodiment, the slurry inlet 101 is disposed on the side wall of the tubular body 100, and the slurry inlet 101 is disposed on the side opposite to the first opening 104, in this embodiment, there are a plurality of slurry inlets 101, and each slurry inlet 101 corresponds to a chute in a one-to-one correspondence relationship, and of course, the number of slurry inlets is not limited, and only one or a reasonable number of chutes at intervals may be disposed correspondingly.

In this embodiment, the evacuation port 102 is disposed at one end of the tubular body 100, and the other end of the tubular body 100 is further provided with a cleaning port 107, that is, the cleaning port 107 is disposed at the opposite side of the evacuation port 102, which is convenient for directly injecting a cleaning solution into the main pipe inner cavity 103 through the cleaning port 107, and the cleaning solution may be water or a fiber dredging solution, so as to prevent the evacuation port 102 from being blocked by waste residues or fiber materials.

As a modified embodiment of the above-mentioned conveying system, only the slurry inlet 101 or only the emptying port 102 may be provided, the slurry inlet 101 is preferably provided at the opposite side of the first opening 104, and of course, may be provided at one end of the tubular body 100, and when only the slurry inlet 101 is provided, the conveying system of this modified embodiment is used for feeding slurry into the chute of the slurry tank 1, and solves the damage of the slurry accumulation to the rotating fan blade 2; when only the evacuation port 102 is provided, the conveying system of the modified embodiment is used for evacuating the slurry tank 1, and solves the problem that the fan blades are damaged due to the transverse impact force generated on the fan blades on the peripheral side when the materials are intensively discharged.

Fig. 6 shows a further embodiment of the conveying system, which differs from the embodiment shown in fig. 2-5 in that the free end of the first opening 104 is not provided with a branch pipe 106, i.e. in this embodiment the first opening 104 of the conveying system communicates directly with the second opening 105 of the vat 1, it being understood that the side wall of the tubular body 100 of the conveying system is co-wall with the vat 1, and that the parts of the wall corresponding to the chute are provided with through holes, which communicate with the chute and the main pipe inner chamber 103, respectively.

Fig. 7 shows yet another embodiment of the conveying system according to the present invention, wherein a three-way pipe 109 is disposed on the sidewall of the tubular body, the three-way pipe 109 is disposed relative to the first opening 104, the three-way pipe 109 includes a connecting pipe port 110 communicated with the main pipe inner cavity 103, a first port for forming the slurry inlet 101, and a second port for forming the drain port 102, wherein the first port and the second port are disposed relatively, x1 is a slurry inlet direction in the drawing, x2 is a drain direction, and this disposition can improve the safety when draining, and the first port can also be used as the cleaning port 107, and at this time, as shown in the drawing as the direction x3, the cleaning solution can be directly injected into the first port to clean the drain port 102. And the first port and the second port are respectively provided with a gate valve 108, when slurry is fed, the gate valve 108 at the second port, namely the emptying port 102, is closed, when slurry is emptied, the gate valve 108 at the first port, namely the slurry inlet 101, is closed, and when cleaning is carried out, the gate valves 108 at the first port and the second port are opened simultaneously.

Fig. 8 shows according to another embodiment of the conveying system of the present invention, different from the embodiment shown in fig. 7, the tubular body 100 is set in a sectional manner in this embodiment, so as to be applied to the stock chest 1 with too large axial length, on the one hand, the strength of the tubular body 100 can be ensured, on the other hand, the manufacturing difficulty is reduced, on the opposite side of each section of the tubular body 100, the embodiment is equally divided into two sections, respectively, by the three-way pipe 109 and at least one first opening 104, the distance between each section of the tubular body can be too small by adopting the structure that the three-way pipe 109 is set on the opposite side of the first opening 104, and the problem that the external pipeline is difficult to empty by setting the evacuation port on the end surface of the tubular body 100 is solved.

Fig. 9 shows another embodiment of the conveying system according to the invention, in which the conveying system is arranged below the side of the vat 1, the vat 1 being arranged horizontally, i.e. the plane in which the central axis x2 of the branch pipe 106 and the central axis x1 of the vat 1 lie has an angle a of 45 ° -135 °, preferably 45 ° -75 ° or 105 ° -135 °, in order to avoid the vat 1, at which time the second opening 105 corresponds to the side opening in the gap corresponding to the bottom of the chute and the bottom wall of the vat, which gap is the dead zone of the fan, with which gap the first opening 104 can still be put into communication, in this particular embodiment a is 75 ° or 105 °.

It should be understood that the foregoing is only a specific embodiment of the present invention, and the technical features related to the different embodiments of the present invention can be combined with each other as long as they do not constitute a conflict with each other, and the scope of the present invention is not limited thereto, and any changes or substitutions that can be easily conceived by those skilled in the art within the technical scope of the present invention should be covered by the scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.

Claims (15)

1. A conveying system arranged to admit pulp into a vat or/and to evacuate the vat, said conveying system comprising a tubular body arranged directly below or laterally below the vat, the tubular body comprising:

a slurry inlet or/and a drain port;

the main pipe inner cavity is communicated with the slurry inlet or/and the emptying port;

the at least two first openings are arranged on the side wall of the tubular body at intervals, communicated with the inner cavity of the main pipe and respectively communicated to second openings arranged under or on the side of the stock chest, and the second openings correspond to the first openings one to one, so that the slurry introduced into the inner cavity of the main pipe from the slurry inlet can be conveniently conveyed to the stock chest, or/and the materials in the stock chest can be conveniently introduced into the inner cavity of the main pipe and then discharged from the emptying port.

2. The delivery system of claim 1, wherein the first opening has an area A and the manifold lumen defines a passage having a cross-sectional area B, wherein 2.25A ≦ B ≦ 4A.

3. A conveying system according to claim 1 or 2, characterized in that a branch pipe is connected between the first opening and the second opening.

4. The transportation system of claim 3, wherein the central axis of the branch pipe has an angle a of 45 ° -135 ° with the horizontal plane.

5. A conveying system according to claim 3, characterised in that the tubular body is arranged directly below the vat and that the centre axis of the branch pipe is arranged perpendicular to the horizontal plane.

6. The conveyor system of claim 3, wherein the tubular body is disposed below a side of the vat, and wherein the angle α 105 ° is an angle of the central axis of the branch pipe to the horizontal.

7. The delivery system of claim 1 or claim 2, wherein the tubular body further comprises a purge port communicating with the interior of the manifold, the purge port being disposed on an opposite side of the drain port.

8. A conveying system according to claim 1 or 2, characterised in that the slurry inlet is provided in a side wall of the tubular body, said slurry inlet being provided opposite the first opening.

9. The delivery system of claim 1 or 2, wherein a tee is provided on a sidewall of the tubular body, the tee being disposed relative to the first opening, comprising:

the connecting pipe orifice is communicated with the inner cavity of the main pipe;

a first port forming the slurry inlet;

and the second port is arranged opposite to the first port to form the evacuation port.

10. The conveying system according to claim 1 or 2, wherein a gate valve is arranged on the slurry inlet and the emptying port respectively.

11. A disc thickener comprising a vat having a plurality of spaced discs axially disposed therein, a chute formed between adjacent discs, the vat having a second opening corresponding to the chute opening below a bottom or side wall of the vat, the disc thickener further comprising a conveyor system according to any of claims 1 to 10, the conveyor system having a first opening connected to the second opening.

12. The disc concentrator of claim 11, wherein the second opening opens below the side wall of the sump, the second opening having a height no greater than the bottom edge of the disc.

13. The disc concentrator of claim 11, wherein each of the troughs has a corresponding second opening, and wherein the first openings of the delivery system are in a one-to-one correspondence with the second openings.

14. The disc concentrator of any one of claims 11-13, wherein the transport system comprises a multi-section tubular body, each section of the tubular body having a tee and at least one of the first openings on opposing sides of the tubular body, the tee comprising:

the connecting pipe orifice is communicated with the inner cavity of the main pipe;

a first port forming the slurry inlet;

and the second port is arranged opposite to the first port to form the evacuation port.

15. The disc concentrator of any one of claims 11 to 13, wherein the tubular body is axially disposed directly below or laterally below the vat, and the length of the tubular body is not less than the axial length of the vat.

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