A wear-resistant spiral pusher structure for a horizontal screw centrifuge

Abstract

The present invention discloses a wear-resistant horizontal screw centrifuge spiral pusher structure, comprising: a spiral component, the spiral component comprising a central shaft and spiral blades arranged on the outside of the central shaft, a feed bin is provided in the central shaft, the feed bin is sealed and connected to the feed channel, and a first discharge port is provided on the side wall of the central shaft. The spiral pusher structure provided in the present application can make targeted structural changes to each wear part, and play a wear-resistant role by rationally arranging corresponding ceramic sheets in the corresponding wear-resistant parts. And the ceramic sheets are configured more stably through structural optimization. By applying the rotating component structure provided in the present application, the wear resistance is greatly improved, and it can be used for at least 2 years.

Description

Technical Field

[0001] The invention relates to the technical field of coal gasification black water separation, and more particularly to a wear-resistant spiral pusher structure of a horizontal screw centrifuge. Background Art

[0002] The horizontal spiral discharge decanter centrifuge is an automated device that uses the high-speed rotation of the drum to generate centrifugal force to separate materials of varying densities. Driven by a motor, the drum rotates at high speed in the same direction as the spiral pusher at a certain speed differential. Material is continuously introduced into the drum through a feed pipe. Under the influence of the centrifugal field, the heavier solids are deposited on the drum wall, forming a sediment layer. The spiral conveyor continuously pushes the deposited solids to the conical section of the drum, where they are discharged through the discharge port. The lighter liquids form an inner liquid ring, which continuously overflows the drum through the overflow port at the large end of the drum and is discharged through the liquid discharge port.

[0003] Traditional centrifuges present significant challenges in separating blackwater and graywater in the coal gasification and chemical industry. The solid phase in these waters consists of large, hard, and abrasive coke residue from coal combustion. Traditional centrifuges utilize standard carbide or hard steel. During the separation process, the coke residue inevitably rubs against the various steel or carbide components that make up the centrifuge, causing significant wear. Currently, the overhaul time for traditional centrifuges in the coal gasification and chemical industry is only six months, significantly impacting production. Summary of the Invention

[0004] The object of the present invention is to provide a wear-resistant spiral pusher structure for a horizontal screw centrifuge, in order to solve the technical problems in the background technology.

[0005] In order to achieve the above object, the present invention adopts the following technical solutions:

[0006] A wear-resistant spiral pusher structure for a horizontal screw centrifuge, comprising:

[0007] The spiral component includes a central shaft and spiral blades arranged on the outside of the central shaft. A feed bin is provided in the central shaft, and the feed bin is sealed and connected to the feed channel. A first discharge port is provided on the side wall of the central shaft.

[0008] In some embodiments, the shape of the central axis is adapted to the shape of the conical straight drum; a third wear-resistant structural layer is adhered to the inner wall of the feed bin; and the third wear-resistant structural layer is a mosaic ceramic sheet.

[0009] In some embodiments, a protective ceramic sheet is bonded to the bottom wall of the feed bin; the first discharge port is a square ceramic discharge port, which is bonded to the side wall of the feed bin, and a second clamping platform is provided on the square ceramic discharge port, which is limited by the second clamping platform and the side wall of the feed bin.

[0010] In some embodiments, the square ceramic discharge port includes:

[0011] A rectangular base, the rectangular base is open at the top and bottom and is through in the middle; the second card table is arranged on the rectangular base; the first ceramic sheet, the first ceramic sheet is arranged on the short side of the inner wall of the rectangular base; the second ceramic sheet, the second ceramic sheet is arranged on the long side of the inner wall of the rectangular base.

[0012] In some embodiments, the outlet of the rectangular base is arranged in an arc shape; the first ceramic sheet is provided with a first limiting step on the side away from the arc end of the rectangular base, and the rectangular base is provided with a second limiting step protruding inward, and the second limiting step cooperates with the first limiting step to limit the movement of the first ceramic sheet toward the rectangular base.

[0013] In some embodiments, the second ceramic sheet is provided with a third limiting step on the side of the arc-shaped end away from the rectangular base, and the rectangular base is provided with a fourth limiting step protruding inward, and the fourth limiting step cooperates with the third limiting step to limit the movement of the second ceramic sheet toward the rectangular base.

[0014] In some embodiments, the first ceramic sheet is bonded to the rectangular base using an adhesive; the second ceramic sheet is bonded to the rectangular base using an adhesive and connected using screws; a plurality of groups of the first discharge ports are provided, and the plurality of groups of the first discharge ports are dispersedly arranged at the discharge port.

[0015] In some embodiments, the spiral blade is provided with a mosaic ceramic sheet on the side facing the solid phase end, a ceramic composite wear-resistant block is provided on the edge of the spiral blade on the side close to the solid phase end, and a tungsten carbide wear-resistant block is provided on the edge of the spiral blade on the side close to the clear liquid end; the ceramic composite wear-resistant block and the tungsten carbide wear-resistant block are both arranged on the side of the spiral blade facing the solid phase end; the edge of the spiral blade is provided with a ceramic composite wear-resistant block at least at a position opposite to the feed bin; the ceramic composite wear-resistant block and the tungsten carbide wear-resistant block are both closely arranged along the edge of the spiral blade.

[0016] In some embodiments, the ceramic composite wear-resistant block includes: a substrate, which is used to connect with the spiral blade; a cemented carbide block, which is connected to the substrate; and a ceramic sheet, which is respectively connected to the substrate and the cemented carbide block.

[0017] In some embodiments, the base body is provided with a mounting clamp on the side facing the spiral blade, and the base body is limitedly mounted by the mounting clamp; the base body is provided with a first mounting step on the side away from the spiral blade, the width of the first mounting step is less than the thickness of the cemented carbide block, and the cemented carbide block and the base body are welded by silver brazing;

[0018] A second mounting step is provided at the bottom of the ceramic sheet, the ceramic sheet is bonded to the side of the cemented carbide block, and the second mounting step is bonded to the bottom surface of the cemented carbide block and the side of the first mounting step respectively;

[0019] The substrate is a stainless steel substrate.

[0020] Compared with the prior art, the present invention has the following beneficial effects:

[0021] The screw pusher structure provided by this application can be modified to target specific wear areas, effectively reducing wear by properly placing corresponding ceramic plates in the corresponding wear-resistant areas. Furthermore, structural optimization allows for a more stable placement of the ceramic plates. By utilizing the rotating component structure provided by this application, wear resistance is greatly improved, allowing for a service life of at least two years. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 Schematic diagram of a decanter centrifuge manufactured using a wear-resistant decanter centrifuge screw pusher structure according to an embodiment of the present application;

[0023] Figure 2 This is a parts diagram of a decanter centrifuge manufactured using a wear-resistant decanter centrifuge screw pusher structure according to an embodiment of the present application;

[0024] Figure 3 This is a structural schematic diagram of a decanter centrifuge manufactured using a wear-resistant decanter centrifuge screw pusher structure according to an embodiment of the present application;

[0025] Figure 4 Schematic diagram of a rotating component structure for a wear-resistant decanter centrifuge according to an embodiment of the present application;

[0026] Figure 5 is a schematic diagram of a spiral component according to an embodiment of the present application;

[0027] Figure 6 is a schematic structural diagram of a spiral component according to an embodiment of the present application;

[0028] Figure 7 yes Figure 6 A partial enlarged view of middle A;

[0029] Figure 8 yes Figure 6A partial enlarged view of B in the middle;

[0030] Figure 9 This is a schematic structural diagram of a conical straight drum according to an embodiment of the present application;

[0031] Figure 10 yes Figure 9 A partial enlarged view of center C;

[0032] Figure 11 It is a schematic diagram of a ceramic composite wear-resistant block;

[0033] Figure 12 This is a parts diagram of a ceramic composite wear-resistant block;

[0034] Figure 13 It is a structural diagram of a ceramic composite wear-resistant block;

[0035] Figure 14 It is a schematic diagram of a square ceramic feed port;

[0036] Figure 15 This is a schematic structural diagram of a square ceramic feed port from a first-person perspective;

[0037] Figure 16 This is a schematic structural diagram of the square ceramic feed port from a second perspective;

[0038] Figure 17 This is a parts diagram of a square ceramic feed port;

[0039] Figure 18 This is the parts diagram of the upper and lower covers;

[0040] Figure 19 It is a structural diagram of the upper and lower covers;

[0041] Figure 20 yes Figure 19 A partial enlarged view of D;

[0042] Illustration: 2-rotating component, 3-differential safety cover, 4-spline shaft, 5-differential, 6-main engine vibration isolator, 8-base, 9-feed pipe bracket, 10-feed pipe, 11-motor drive device, 12-belt safety cover;

[0043] 21- solid phase end bearing seat, 22- solid phase end component, 23- conical straight drum, 24- clear liquid end component, 25- clear liquid end bearing seat, 26- spiral component, 27- differential connecting plate, 28- driven pulley;

[0044] 31-conical drum, 32-straight drum, 33-mosaic ceramic piece, 34-long ceramic piece, 35-ceramic discharge port, 36-metal wear-resistant strip;

[0045] 41-central shaft, 43-square ceramic feed port, 44-ceramic sheet, 45-spiral blade, 46-ceramic composite wear-resistant block, 47-tungsten carbide wear-resistant block, 48-feed bin;

[0046] 51- rectangular base, 52- first ceramic sheet, 53- second ceramic sheet, 54- countersunk screw;

[0047] 61-ceramic sheet, 62-carbide block, 63-stainless steel substrate;

[0048] 71-upper cover, 72-lower cover, 73-upper cover steel lining, 75-lower cover steel lining. DETAILED DESCRIPTION

[0049] In order to make the purpose, technical solutions and advantages of the present application clearer, the technical solutions in the embodiments of the present application will be described in more detail below in conjunction with the drawings in the preferred embodiments of the present application. In the drawings, the same or similar reference numerals throughout represent the same or similar parts or parts with the same or similar functions. The described embodiments are part of the embodiments of the present application, not all of the embodiments. The embodiments described below with reference to the drawings are exemplary and are intended to be used to explain the present application, and should not be understood as limitations on the present application. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of this application.

[0050] The embodiments of the present application are described in detail below with reference to the accompanying drawings.

[0051] In the description of this application, it should be noted that, unless otherwise expressly specified or limited, the terms "mounted," "connected," and "connected" should be understood in a broad sense. For example, they may refer to a fixed connection, an indirect connection via an intermediate medium, internal communication between two components, or an interaction between two components. Those skilled in the art will understand the specific meanings of the above terms in this application based on the specific circumstances.

[0052] In the description of this application, it should be understood that the terms "upper", "lower", "front", "back", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating orientations or positional relationships, are orientations or positional relationships based on the accompanying drawings, and are only for the convenience of describing this application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on this application.

[0053] In addition, the terms "comprises" and "having" and any variations thereof are intended to cover a non-exclusive inclusion; for example, a process, method, system, product, or display that comprises a series of steps or elements is not necessarily limited to those steps or elements expressly listed but may include other steps or elements not expressly listed or inherent to such process, method, product, or display.

[0054] The following will be combined Figures 1-20 , a wear-resistant decanter centrifuge screw pusher structure involved in the embodiment of the present application is described in detail. It is worth noting that the following embodiments are only used to explain the present application and do not constitute a limitation of the present application. In order to better illustrate its structure and working principle, it is applied to a wear-resistant decanter centrifuge rotating component structure for detailed description below.

[0055] Embodiment 1:

[0056] like Figure 1 As shown, a wear-resistant rotating component structure for a horizontal screw centrifuge includes: a conical straight drum 23, a solid phase end component 22, a clear liquid end component 24, a spiral component 26, a solid phase end bearing seat 21, a clear liquid end bearing seat 25, a differential 5 connecting plate, and a driven pulley 28.

[0057] The conical drum 23 is a structure with a cavity and two open ends, one end being a solid phase end and the other end being a clear liquid end; the solid phase end component 22 is connected to the solid phase end of the conical drum 23; a feed channel is provided on the solid phase end component 22; the clear liquid end component 24 is connected to the clear liquid end of the conical drum 23; a plurality of liquid outlet holes are provided on the clear liquid end component 24; the spiral component 26 is arranged in the cavity, and the two ends of the spiral component 26 are respectively connected to the bearings on the solid phase end component 22 and the clear liquid end component 24; so that the spiral component 26 can rotate relative to the conical drum 23;

[0058] The spiral component 26 includes a central shaft and a spiral blade 45 arranged on the outside of the central shaft. A feed bin is provided in the central shaft, and the feed bin is sealed and connected to the feed channel. A first discharge port is provided on the side wall of the central shaft; the solid-phase end bearing seat 21 is used to support the solid-phase end component 22, and a bearing is installed between the solid-phase end bearing seat 21 and the solid-phase end component 22; it is a stationary component that provides rotational support.

[0059] The clear liquid end bearing seat 25 is used to support the clear liquid end component 24, and a bearing is installed between the clear liquid end bearing seat 25 and the clear liquid end component 24; the differential 5 connecting plate is connected to the clear liquid end component 24; the driven pulley 28 is connected to the solid phase end component 22.

[0060] See also Figure 1-3The figure shows the structure of the rotating component 2 of this application applied to a decanter centrifuge for coal chemical industry. The upper housing 71 and the lower housing 72 are screwed together, forming a relatively closed chamber. The separated solid and liquid phases are discharged from the solid and liquid ends of the lower housing 72, respectively. The rotating component 2 comprises a clean liquid end bearing seat 25, a clean liquid end component 24, a conical straight drum 23, a spiral component 26, a solid phase end component 22, a solid phase end bearing seat 21, a driven pulley 28, and a connecting plate for the differential 5. The clean liquid end component 24, the drum component, the solid phase end component 22, the driven pulley 28, and the connecting plate for the differential 5 are screwed together. Bearings are installed at both ends of the spiral component 26 and the drum component, enabling relative rotation. The bearing seats at both ends are mounted on the base 8 and contain bearings, enabling the rotating component 2 to rotate. The main motor drives the driven pulley 28 via a belt. The differential 5 connecting plate is screwed to the differential 5. The differential 5 is fed with hydraulic oil of flow and pressure from an external hydraulic pump station, which causes the internal splines of the differential 5 and the differential 5 housing to rotate relative to each other. The spline shaft 4 has one end splined to the internal splines of the differential 5 and the other end connected to the spiral component 26, thus providing power for the relative rotation of the drum component and the spiral component 26.

[0061] See also Figure 4 The drum forms a container, and its rotation speed provides centrifugal force, which allows the material to settle quickly. The screw pusher pushes the settled solids inside the drum to the solid phase end (conical section), while the clear liquid flows out through the counterflow hole at the clear liquid end.

[0062] The safety cover 3 of the differential 5 is screwed to the base 8, providing a safety feature. One end of the splined shaft 4 is splined to the internal splines of the differential 5, while the other end is connected to the internal splined connection plate of the screw pusher inside the rotating component 2. The internal splines of the differential 5 and the screw component 26 act as a transmission. The screw connection between the differential 5 and the rotating component 2 is fed by hydraulic oil at a high flow rate and pressure from an external hydraulic pump station, which creates a relative rotational speed between the internal splines of the differential 5 and the differential 5 housing, ultimately providing a differential speed between the rotating drum and the screw component 26.

[0063] The main unit vibration isolator 6 is screwed to the base 8, isolating the polarization force generated during high-speed centrifuge operation from affecting the foundation and the outside world. The feed pipe bracket 9 is mounted on the rotating component 2, providing a mounting structure for the feed pipe 10. The feed pipe 10 is screwed to the feed pipe bracket 9, providing an inlet channel for the material. The motor drive unit 11 is screwed to the base 8, providing speed and power for the centrifuge rotating component 2. The belt safety cover 12 is screwed to the motor base plate on the motor drive unit 11, mainly for safety protection.

[0064] See also Figure 18-20The lower cover 72 is welded to the base 8 and screwed to the upper cover 71. The screw connection between the upper cover 71 and the lower cover 72 forms a relatively closed cavity, and the separated solid and liquid phases are discharged from the solid phase end and liquid phase end of the lower cover 72 respectively.

[0065] Mosaic ceramic sheets 33 are attached to the upper housing 71 at a position opposite the solid phase end of the lower housing 72 via structural adhesive. As the drum rotates at high speed, the solid phase ejected from the discharge port of the conical drum 31 travels at very high speeds, striking the inner wall of the housing and causing significant erosion and wear, particularly in the coal gasification industry. The carbon slag separated from the coal gasification industry is extremely hard, and conventional materials such as steel and cemented carbide only last for three to six months. By using mosaic ceramic sheets 33, a high-hardness ceramic material, to adhere to the inner wall, zero or minimal wear is achieved, significantly extending the equipment's service life.

[0066] In order to further play a double insurance protection role, an upper cover shell steel lining plate 73 is installed between the upper cover shell 71 and the mosaic ceramic pieces 33. The upper cover shell steel lining plate 73 is welded to the inner wall of the upper cover shell 71 outlet. If the mosaic ceramic piece 33 falls off partially, it can provide secondary protection and improve the service life of the cover shell.

[0067] Similarly, a lower housing steel liner 75 is provided at the solid phase outlet of the lower housing 72. The lower housing steel liner 75 is welded to the inner wall of the lower housing 72 outlet. A mosaic ceramic sheet 33 is provided on the lower housing steel liner 75. If the mosaic ceramic sheet 33 partially falls off, it can provide secondary protection and extend the service life of the housing.

[0068] The main motor drives the driven pulley 28 via a belt. The differential 5 connecting plate is screwed to the differential 5. Hydraulic oil with a constant flow and pressure is fed to the differential 5 from an external hydraulic pump station, causing the internal splines of the differential 5 to rotate relative to the differential 5 housing. The spline shaft 4, with one end splined to the internal splines of the differential 5 and the other end connected to the spiral component 26, provides the power for relative rotation between the drum component and the spiral component 26.

[0069] See also Figure 5-10 The conical straight drum 23 includes: a conical segment drum 31 and a straight segment drum 32 connected to each other, and the conical segment drum 31 and the straight segment drum 32 are respectively provided with mutually connected cavities, a first wear-resistant layer is installed on the inner wall of the cavity of the straight segment drum 32, and a second wear-resistant layer is installed on the inner wall of the cavity of the conical segment drum 31, and a horizontal section is provided at the end of the conical segment drum 31 on the side away from the straight segment drum 32, and the horizontal section is provided with a plurality of second discharge ports.

[0070] The conical drum 31 and the straight drum 32 both serve as containers for centrifugal separation. The first wear-resistant layer installed on the inner wall of the cavity of the straight drum 32 and the second wear-resistant layer installed on the inner wall of the cavity of the conical drum 31 can effectively protect the inner wall of the drum from erosion and wear. The solid phase is continuously pushed to the conical section of the drum and discharged from the machine through the second discharge port.

[0071] In some embodiments, the first wear-resistant layer includes first wear-resistant ribs. Multiple first wear-resistant ribs are radially arranged on the inner wall of the cavity of the straight drum 32. Adjacent first wear-resistant ribs form a first mounting cavity between the inner wall of the cavity of the straight drum 32. The first mounting cavity is filled with the first wear-resistant structural layer. A structure with a circular cross-section is filled between the first wear-resistant structural layer and the first wear-resistant ribs. The first wear-resistant ribs prevent circumferential slippage of material within the drum, improving slag conveying efficiency and providing greater wear resistance than metal wear-resistant strips 36.

[0072] In some embodiments, the first wear-resistant ribs include metal wear-resistant strips 36 and long ceramic sheets 34. One section of the first wear-resistant ribs is a metal wear-resistant strip 36, and the other section is a long ceramic sheet 34. The metal wear-resistant strip 36 and the long ceramic sheet 34 have the same width and thickness. The metal wear-resistant strip 36 and the long ceramic sheet 34 are arranged in a straight line. The area where the long ceramic sheet 34 is arranged is opposite to the first discharge port of the spiral component 26. The first wear-resistant structural layer is a mosaic ceramic sheet 33. The long ceramic sheet 34 is 3mm thicker than the mosaic ceramic sheet 33 and is neatly bonded to the inner wall of the drum to form wear-resistant ribs. Use structural adhesive to neatly bond the mosaic ceramic sheet 33 to the inner wall of the conical drum 31 and the straight drum 32. The gap between the mosaic ceramic sheets 33 is 2mm so that the adhesive can bond better.

[0073] Here, the first wear-resistant rib is made of a metal wear-resistant strip 36 and a long ceramic sheet 34. The main considerations are as follows: first, when the material enters the drum from the first discharge port, the speed is not fast. The material must be accelerated by the drum to a speed at which the solid phase and the liquid phase can be separated. Then this acceleration requires the drum to accelerate the material, that is, the friction between the material and the inner wall of the drum to accelerate the material. Then this friction causes the inner wall of the cavity of the traditional straight drum 32 to be severely damaged. Therefore, the present application sets a long ceramic sheet 34 in the area opposite to the first discharge port of the spiral component 26, that is, on the side close to the solid phase end, and sets a metal wear-resistant strip 36 on the side close to the clear liquid end, that is, dividing the traditional metal wear-resistant strip 36 into two materials. The long ceramic sheet 34 prevents the circumferential sliding of the material inside the drum, improves the slag conveying efficiency, and is more wear-resistant than the metal wear-resistant strip 36. Prevents the circumferential sliding of the material inside the drum and improves the slag conveying efficiency.

[0074] Second, because the solid phase material is less near the clear liquid end, the wear is not great, so the metal wear-resistant strips 36 are adopted. Simultaneously, the metal wear-resistant strips 36 can also be adopted to improve the rigidity of the drum as a whole.

[0075] In some embodiments, the second wear-resistant layer includes second wear-resistant ribs. Multiple second wear-resistant ribs are radially arranged on the inner wall of the conical drum 31. Adjacent second wear-resistant ribs form a second mounting cavity between the inner wall of the straight drum 32. The second mounting cavity is filled with the second wear-resistant structural layer. The second wear-resistant ribs prevent circumferential slippage of material within the drum, improving slag conveying efficiency and providing greater wear resistance than metal wear-resistant strips 36.

[0076] In some embodiments, the second wear-resistant structural layer and the second wear-resistant rib in the second mounting cavity form a truncated cone with a circular cross-section. The second wear-resistant rib includes a long ceramic sheet 34. The long ceramic sheet 34 is more wear-resistant than the metal wear-resistant strip 36.

[0077] In some embodiments, the first wear-resistant structural layer filled in the first installation cavity and the second wear-resistant structural layer filled in the second installation cavity are both mosaic ceramic sheets 33. The mosaic ceramic sheets 33 can protect the inner wall of the drum from erosion and wear.

[0078] In some embodiments, a mosaic ceramic piece 33 is bonded to the inner wall of the horizontal section, the second discharge port is a ceramic discharge port 35, the ceramic discharge port 35 is bonded in the horizontal section, and a first clamping platform is provided on the ceramic discharge port 35, which is limited by the first clamping platform and the side wall of the horizontal section.

[0079] The mosaic ceramic sheet 33 in the horizontal section also protects the interior of the cone drum 31. The ceramic discharge port 35 is bonded to the side wall of the cone drum 31 using a structural adhesive. The ceramic discharge port 35 is more wear-resistant than a cemented carbide discharge port and will not wear out when used in the coal chemical industry.

[0080] The ceramic discharge port 35 is provided with a first clamping platform, which is limited by the first clamping platform and the side wall of the horizontal section. The two clamp each other to prevent the influence of centrifugal force on the shear force of the adhesive when the centrifuge is working.

[0081] In some embodiments, the shape of the central axis 41 is adapted to the shape of the conical drum 23 ; a third wear-resistant structural layer is attached to the inner wall of the feed bin, and the third wear-resistant structural layer is a mosaic ceramic sheet 33 .

[0082] In some embodiments, a protective ceramic sheet 44 is bonded to the bottom wall of the feed bin, which is bonded to the baffle at the bottom of the central shaft 41 to prevent the weld between the central shaft and the baffle from being worn when the material is accelerated.

[0083] In some embodiments, the first discharge port is a square ceramic discharge port 35, which is bonded to the side wall of the feed bin 48, and a second clamping platform is provided on the square ceramic discharge port 35, which is limited by the second clamping platform and the side wall of the feed bin.

[0084] Material enters the central shaft 41 through the feed pipe 10 and enters the drum through the first outlet. As the material enters, its rotation speed is very slow, while the spiral component 26 rotates very quickly, causing the material to be thrown out. This causes severe erosion of the first outlet surface. Coal chemical material can wear through a 10mm carbide disc in just three months, resulting in a spiral lifespan of only six months, which is completely insufficient for production needs.

[0085] See also Figure 14-17 The square ceramic discharge port 35 includes: a rectangular base 51, which is open at the top and bottom and through in the middle; the second card table is arranged on the rectangular base 51; the first ceramic sheet 52, which is arranged on the short side of the inner wall of the rectangular base 51; and the second ceramic sheet 53, which is arranged on the long side of the inner wall of the rectangular base 51.

[0086] The rectangular base 51 is made of stainless steel and provides a component for bonding the four ceramic blocks. The outlet of the rectangular base 51 is set in an arc shape. The curved side of the base is provided with threaded holes to ensure that the ceramic can be more stably installed on the base.

[0087] In some embodiments, the first ceramic sheet 52 is provided with a first limiting step on the side of the arc-shaped end away from the rectangular base 51, and the rectangular base 51 is provided with a second limiting step protruding inward. The second limiting step cooperates with the first limiting step to limit the movement of the first ceramic sheet 52 toward the rectangular base 51.

[0088] The first ceramic sheet 52 is bonded to the rectangular base 51 with adhesive, and the second ceramic sheet 53 is bonded to the rectangular base 51 with adhesive and connected with countersunk screws 54. The first limiting step and the second limiting step clamp each other to reduce the influence of centrifugal force on the shear force of the adhesive.

[0089] In some embodiments, the second ceramic sheet 53 is provided with a third limiting step on a side away from the curved end of the rectangular base 51. The rectangular base 51 is provided with an inwardly protruding fourth limiting step. The fourth limiting step cooperates with the third limiting step to limit the movement of the second ceramic sheet 53 toward the rectangular base 51. The third limiting step and the fourth limiting step clamp each other to reduce the effect of centrifugal force on the shear force of the adhesive.

[0090] In some embodiments, the first discharge ports are provided in multiple groups, and the multiple groups of first discharge ports are dispersedly arranged at the discharge port. For example, four groups can be provided at equal intervals, with 4-6 discharge ports in each group.

[0091] In some embodiments, the spiral blade 45 is provided with a mosaic ceramic piece 33 on the side facing the solid phase end, a ceramic composite wear-resistant block 46 is provided on the edge of the spiral blade 45 on the side close to the solid phase end, and a tungsten carbide wear-resistant block 47 is provided on the edge of the spiral blade 45 on the side close to the clear liquid end; the ceramic composite wear-resistant block 46 and the tungsten carbide wear-resistant block 47 are both arranged on the side of the spiral blade 45 facing the solid phase end.

[0092] Because coal chemical blackwater is highly abrasive, metal can be quickly eroded, leading to fractures in the center shaft 41 and severe wear and tear on the spiral blades 45, making it impossible to push the material. This solution protects these two critical locations. The main function of the spiral blades 45 is to push the separated solid slag toward the second discharge port of the conical drum 31.

[0093] In some embodiments, the ceramic composite wear-resistant block 46 and the tungsten carbide wear-resistant block 47 are closely arranged along the edge of the spiral blade 45. The edge of the spiral blade 45 is provided with a ceramic composite wear-resistant block 46 at least at a position opposite to the feed bin. The stainless steel base 63 of the ceramic composite wear-resistant block 46 is welded to the spiral blade 45 to protect the spiral blade 45 from being worn by solid slag. The stainless steel base 63 of the tungsten carbide wear-resistant block 47 is welded to the spiral blade 45 to protect the spiral blade 45 from being worn by solid slag. Since it is close to the clear liquid end, there is no ceramic protection and it is only welded to the clear liquid end.

[0094] See also Figure 11-13 The ceramic composite wear-resistant block 46 comprises a base, which is a stainless steel base 63. The stainless steel base 63 serves as a connector for the spiral blade 45; a cemented carbide block 62 connected to the base; and a ceramic sheet 61 connected to the base and the cemented carbide block 62.

[0095] Because coal chemical materials are very abrasive, cemented carbide cannot push materials for a long time. Extensive maintenance has shown that the service life of the spiral blade 45 using only cemented carbide blocks 62 is less than half a year. After the spiral blade 45 is worn, the material cannot be ejected, causing solid phase accumulation and further wear of the spiral. After the material can no longer be pushed out, it will block the machine.

[0096] The base body is provided with a mounting bracket on the side facing the spiral blade 45, which allows the base body to be positioned and fixed. A first mounting step is provided on the side facing away from the spiral blade 45. The width of the first mounting step is less than the thickness of the cemented carbide block 62, and the cemented carbide block 62 is silver-brazed to the base body. A second mounting step is provided at the bottom of the ceramic sheet 61, which is bonded to the side of the cemented carbide block 62, with the second mounting step bonded to the bottom surface of the cemented carbide block 62 and the side of the first mounting step.

[0097] Since the ceramic sheet 61 is hard and brittle, if an impact occurs during the material removal process and the ceramic sheet 61 breaks (small parts), the cemented carbide can also play a certain protective role.

[0098] The ceramic sheet 61 has a second mounting step at its lower portion, and the base body has a first mounting step at a side away from the spiral blade 45 . The first mounting step and the second mounting step clamp each other to reduce the influence of centrifugal force on the shear force of the adhesive.

[0099] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A wear-resistant spiral pusher structure for a horizontal screw centrifuge, characterized in that: include: A spiral component, the spiral component comprising a central shaft and spiral blades arranged outside the central shaft, a feed bin is provided in the central shaft, the feed bin is in sealed communication with the feed channel, and a first discharge port is provided through the side wall of the central shaft; The bottom wall of the feed bin is bonded with a protective ceramic sheet; the first discharge port is a square ceramic discharge port, which is bonded to the side wall of the feed bin, and a second clamping platform is provided on the square ceramic discharge port, which is limited by the second clamping platform and the side wall of the feed bin; The square ceramic discharge port comprises: A rectangular base body, the rectangular base body is open at the top and bottom and is through in the middle; the second card platform is arranged on the rectangular base body; a first ceramic sheet, the first ceramic sheet being arranged on a short side of an inner wall of the rectangular base; a second ceramic sheet, the second ceramic sheet being arranged on a long side of an inner wall of the rectangular base; The outlet of the rectangular base is arranged in an arc shape; the first ceramic sheet is provided with a first limiting step on a side away from the arc end of the rectangular base, and the rectangular base is provided with a second limiting step protruding inward, and the second limiting step cooperates with the first limiting step to limit the movement of the first ceramic sheet toward the rectangular base; The second ceramic sheet is provided with a third limiting step on a side away from the arc-shaped end of the rectangular base, and the rectangular base is provided with a fourth limiting step protruding inwardly. The fourth limiting step cooperates with the third limiting step to limit the movement of the second ceramic sheet toward the rectangular base; The spiral blade is provided with a mosaic ceramic piece on the side facing the solid phase end, a ceramic composite wear-resistant block is provided on the edge of the spiral blade on the side close to the solid phase end, and a tungsten carbide wear-resistant block is provided on the edge of the spiral blade on the side close to the clear liquid end; the ceramic composite wear-resistant block and the tungsten carbide wear-resistant block are both arranged on the side of the spiral blade facing the solid phase end; the edge of the spiral blade is provided with a ceramic composite wear-resistant block at least at a position opposite to the feed bin; the ceramic composite wear-resistant block and the tungsten carbide wear-resistant block are both closely arranged along the edge of the spiral blade.

2. A wear-resistant spiral pusher structure for a horizontal screw centrifuge according to claim 1, characterized in that: The shape of the central axis is adapted to the shape of the conical straight drum; a third wear-resistant structural layer is attached to the inner wall of the feed bin; and the third wear-resistant structural layer is a mosaic ceramic piece.

3. The wear-resistant spiral pusher structure of a horizontal screw centrifuge according to claim 1, characterized in that: The first ceramic sheet is bonded to the rectangular base using an adhesive; the second ceramic sheet is bonded to the rectangular base using an adhesive and connected using screws; and the first discharge port is provided with a plurality of groups.

4. The wear-resistant spiral pusher structure of a decanter centrifuge according to claim 1, characterized in that: The ceramic composite wear-resistant block comprises: a base body, the base body being used for connecting with the spiral blade; a cemented carbide block connected to the substrate; Ceramic sheets are connected to the substrate and the cemented carbide block respectively.

5. The wear-resistant spiral pusher structure of a horizontal screw centrifuge according to claim 4, characterized in that: The base body is provided with a mounting clamp on the side facing the spiral blade, and the base body is limitedly mounted by the mounting clamp; the base body is provided with a first mounting step on the side away from the spiral blade, the width of the first mounting step is smaller than the thickness of the cemented carbide block, and the cemented carbide block and the base body are welded by silver brazing; A second mounting step is provided at the bottom of the ceramic sheet, the ceramic sheet is bonded to the side of the cemented carbide block, and the second mounting step is bonded to the bottom surface of the cemented carbide block and the side of the first mounting step respectively; The substrate is a stainless steel substrate.

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