A feed and discharge device for a horizontal screw discharge decanter centrifuge

Abstract

The application discloses a feeding and discharging device for a horizontal screw discharge sedimentation centrifuge, which comprises a feeding channel assembly, a rotary drum, a slag conveying screw and a discharging channel assembly; the rotary drum is a hollow cavity; two ends of the rotary drum are a large-diameter end and a small-diameter end respectively, the large-diameter end is provided with a feed liquid inlet, and the small-diameter end is provided with a solid phase slag outlet; the slag conveying screw is arranged in the cavity of the rotary drum and rotates coaxially with the rotary drum; the feeding channel assembly is communicated with the feed liquid inlet; the discharging channel assembly comprises a clear liquid discharge pipeline and a solid phase slag collecting element, the clear liquid discharge pipeline is communicated with the inside of the rotary drum; and the solid phase slag collecting element is communicated with the solid phase slag outlet. The feed liquid inlet is directly communicated with the inside cavity of the rotary drum, on one hand, high-speed shearing of the solid phase slag by the cloth hole can be avoided, and on the other hand, the flushing of the separated liquid layer and solid phase layer in the rotary drum by the raw slurry during feeding is eliminated, so that the separation capacity and separation effect of the centrifuge are effectively improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of solid-liquid separation equipment, in particular to an inlet and outlet device for a horizontal screw discharge sedimentation centrifuge. BACKGROUND

[0002] The horizontal screw discharge sedimentation centrifuge, i.e. the horizontal sedimentation screw discharge centrifuge, is composed of a high-speed rotating drum, a screw pusher with the same rotating direction as the drum and slightly higher or lower rotating speed than the drum, a differential mechanism and other components. Under the action of the rotating centrifugal force, the solid phase sludge in the raw slurry is on the outermost layer and adheres to the inner wall of the drum, and the separated liquid phase is mainly in the middle layer. The solid phase sludge is gradually pushed to the small section of the discharge port of the drum by the blades on the screw pusher and is discharged. The separated liquid phase flows out from the large end of the drum and is discharged from the liquid outlet.

[0003] In the prior art, when the raw slurry enters the horizontal screw discharge sedimentation centrifuge for centrifugal separation, the raw slurry first enters the cavity of the hollow shaft of the screw pusher. The hollow shaft is provided with a distribution hole. Therefore, the raw slurry has to pass through the distribution hole before reaching the cavity of the drum. When the raw slurry passes through the distribution hole, it will be subjected to high-speed shearing by the distribution hole. If the solid phase is a fragile or flocculent soft solid, it will be severely broken, and the originally large particle solid phase becomes a small particle, thereby affecting the solid-liquid separation effect or increasing the separation difficulty of the centrifuge. In addition, the raw slurry accelerated by the screw pusher enters the liquid layer surface of the drum in the form of high-speed injection from the distribution hole, which will produce a strong impact vortex, promoting the re-mixing of the separated liquid phase and solid phase. Therefore, the traditional feeding mode of the horizontal screw discharge sedimentation centrifuge has very low separation efficiency, resulting in small separation capacity.

[0004] Therefore, there is a need in the technical field for an inlet and outlet device with simple configuration, strong solid-liquid mixed liquid separation capacity and high efficiency. SUMMARY

[0005] In order to solve the above technical problems, the present application provides an inlet and outlet device with simple configuration, strong solid-liquid mixed liquid separation capacity and high solid-liquid separation efficiency.

[0006] In order to achieve the above purpose, the technical scheme of the present application is as follows:

[0007] In one aspect, the application discloses a feeding and discharging device for a horizontal screw discharge sedimentation centrifuge, which comprises a feeding channel assembly, a rotating drum, a sludge conveying screw and a discharging channel assembly; the rotating drum is a hollow cavity which is erected on a bearing support and rotates under the drive of a driving element; the rotating drum is provided with a large-diameter end and a small-diameter end at two axial ends respectively; the large-diameter end is provided with a feed liquid inlet, and the small-diameter end is provided with a solid phase sludge outlet; the sludge conveying screw is arranged in the cavity of the rotating drum and rotates coaxially with the rotating drum; the feeding channel assembly is communicated with the feed liquid inlet of the rotating drum and is used for conveying raw slurry to the rotating drum; the discharging channel assembly comprises a clear liquid discharge pipeline and a solid phase sludge collecting element; the clear liquid discharge pipeline is communicated with the inside of the rotating drum and is used for discharging the clear liquid separated from the raw slurry; and the solid phase sludge collecting element is communicated with the solid phase sludge outlet and is used for discharging the solid phase slurry separated from the raw slurry.

[0008] The technical scheme has the beneficial effects that the problems of low solid-liquid separation capacity and separation efficiency of the feeding and discharging device of the horizontal screw discharge sedimentation centrifuge in the prior art are fully considered; the position and direction of the feed liquid inlet are adjusted to be directly communicated with the internal cavity of the rotating drum; on one hand, the high-speed shearing of the solid phase slurry on the feed hole of the centrifuge when the raw slurry is fed is avoided; on the other hand, the flushing of the liquid layer and the solid phase layer which have been separated in the rotating drum by the raw slurry when the raw slurry is fed is eliminated, so that the separation capacity and separation efficiency of the centrifuge are effectively improved. Especially when the solid phase material is a fragile or flocculent soft solid, the initial particle size and state of the solid phase in the raw slurry are maximally maintained, and the advantages are more prominent.

[0009] As a further improvement of the technical scheme, the rotating drum comprises a large-diameter end cover, a variable-diameter rotating drum and a small-diameter end cover; the feed liquid inlet is arranged on the large-diameter end cover, and the end of the feed liquid inlet close to the cavity of the rotating drum is arranged at the joint of the large-diameter end cover and the variable-diameter rotating drum.

[0010] The technical scheme has the beneficial effects that the end of the feed liquid inlet close to the cavity of the rotating drum is arranged at the joint of the large-diameter end cover and the variable-diameter rotating drum; on one hand, the feed liquid inlet no longer enters the rotating drum after being accelerated by the hollow cavity in the sludge conveying screw, so that the high-speed shearing of the raw slurry by the feed hole of the rotating sludge conveying screw is avoided; on the other hand, in the rotating drum, under the centrifugal action, the solid phase slurry is located at the outermost layer and adheres to the inner wall of the rotating drum, the liquid phase after separation, i.e. the clear liquid, is located at the middle layer, the raw slurry enters the rotating drum through the feed liquid inlet of the technical scheme, the solid phase slurry directly enters the area close to the inner wall of the rotating drum, the probability of the mixing of the solid phase slurry and the clear liquid is greatly reduced, the solid-liquid separation efficiency is effectively improved, and the liquid phase which has not been separated in the raw slurry helps to push the solid phase slurry adhering to the inner wall of the rotating drum to move along the axial direction to the solid phase slurry outlet of the small-diameter end, and then gradually enters the middle layer to become the clear liquid under the centrifugal force.

[0011] As a further improvement of the technical scheme of the present application, the large-diameter end cover is provided with a first shaft rod for supporting rotation, the center of the first shaft rod is provided with an axial through hole, the axial through hole is communicated with a disc inner cavity with a diameter larger than the axial through hole near one end of the variable-diameter rotating drum, and the radial direction of the disc inner cavity is communicated with the feed liquid inlet; the feed channel assembly comprises a first feed pipe and a distribution disc, the first feed pipe is arranged in the axial through hole, the distribution disc is arranged in the disc inner cavity, the axial inlet of the distribution disc is fixedly connected with the first feed pipe, and the radial outlet of the distribution disc is communicated with the feed liquid inlet.

[0012] The beneficial effects of the above technical scheme are that the circumferential through hole is arranged in the center of the first shaft rod, and the disc inner cavity is further arranged, so that the purpose of conveying the raw slurry from the center of the rotating shaft of the rotating drum into the rotating drum is achieved, the influence of the rotation of the rotating drum on the arrangement of the feed pipe is avoided, the feed pipe is simple in configuration, and the cost is economic.

[0013] As a further improvement of the technical scheme of the present application, the slag conveying screw comprises a cylinder and a spiral blade, the cylinder is a variable-diameter cylinder, and the distribution directions of the large-diameter end and the small-diameter end of the cylinder are consistent with the distribution directions of the large-diameter end and the small-diameter end of the rotating drum; the clear liquid discharge pipeline comprises a first return pipe, the first return pipe is arranged in the cavity of the rotating drum, and the first return pipe is close to the cylinder.

[0014] The beneficial effects of the above technical scheme are that on the one hand, the variable-diameter direction of the cylinder of the slag conveying screw is consistent with the variable-diameter direction of the variable-diameter rotating drum, so that the spiral blade can gradually push the solid-phase slag on the inner wall of the variable-diameter rotating drum to move towards the solid-phase slag discharge port during rotation; on the other hand, the first return pipe is close to the cylinder of the slag conveying screw, so that the liquid phase in the intermediate layer which has been separated can be smoothly discharged.

[0015] As a further improvement of the technical scheme of the present application, the clear liquid discharge pipeline further comprises a centrifugal pump, and the centrifugal pump is coaxially arranged with the cylinder.

[0016] The beneficial effects of the above technical scheme are that the arrangement of the centrifugal pump can further accelerate the gathering of the liquid phase in the intermediate layer which has been separated in the rotating drum into the clear liquid discharge pipeline, so as to further improve the solid-liquid separation efficiency.

[0017] As a further improvement of the technical scheme of the present application, the outer diameter of the centrifugal pump is larger than the outer diameter of the cylinder, the liquid inlet of the centrifugal pump is arranged on one side of the outer diameter of the centrifugal pump, and the liquid inlet faces the large-diameter end cover of the rotating drum.

[0018] The beneficial effect of the above technical scheme is that the liquid inlet of the centrifugal pump is arranged towards the large-diameter end cover, which is just opposite to the overall movement direction of the separated liquid phase in the intermediate layer, which helps the separated liquid phase to quickly enter the liquid inlet of the centrifugal pump, and then quickly discharge through the centrifugal pump and the clean liquid discharge pipeline, thereby further improving the solid-liquid separation efficiency.

[0019] As a further improvement of the technical scheme of the application, the liquid outlet of the centrifugal pump is arranged at the center of the side of the centrifugal pump facing the large-diameter end cover; the clean liquid discharge pipeline further comprises a second return pipe, one end of the second return pipe is fixedly connected with the liquid outlet of the centrifugal pump, and the other end of the second return pipe extends to the outside through the first feeding pipe.

[0020] The beneficial effect of the above technical scheme is that the second return pipe is arranged to extend to the outside through the first feeding pipe, which can realize coaxial arrangement of the first feeding pipe and the second return pipe at the common rotation center of the drum and the slag conveying screw, which is beneficial to the arrangement of the second return pipe to avoid the influence of the rotation of the drum and the slag conveying screw.

[0021] As a further improvement of the technical scheme of the application, the large-diameter end cover is provided with an annular groove around the first shaft, and one end of the liquid inlet facing the outside is arranged on the side of the annular groove facing the first shaft; the feeding channel assembly further comprises a second feeding pipe and a sealing cover, the sealing cover is arranged around the liquid inlet, and the second feeding pipe communicates with the liquid inlet from the outside through the sealing cover.

[0022] The beneficial effect of the above technical scheme is that the annular groove is arranged, and one end of the liquid inlet facing the outside is arranged on the side of the annular groove facing the first shaft, which helps to arrange the outlet of the feeding pipe to cooperate with the liquid inlet to supply liquid in the direction away from the rotation center, so as to quickly enter the cavity inside the drum in the centrifugal direction.

[0023] As a further improvement of the technical scheme of the application, the clean liquid discharge pipeline further comprises a liquid outlet hopper corresponding to the outlet of the first return pipe.

[0024] The beneficial effect of the above technical scheme is that the arrangement of the liquid outlet hopper helps to receive and concentrate the separated liquid phase discharged by the first return pipe, so as to realize the purpose of solid-liquid phase separation and separate collection.

[0025] As a further improvement of the technical scheme of the application, the outlet of the first return pipe is arranged on the side of the variable-diameter drum close to the large-diameter end cover, and the liquid outlet hopper is arranged below the outlet of the first return pipe.

[0026] The beneficial effects of the above technical scheme are that the first reflux pipe is arranged on the side of the variable-diameter rotating drum close to the large-diameter end cover and discharges downward in the rotating process, cooperates with the liquid outlet bucket below, thereby avoiding splashing of the clarified liquid, and can improve the collection efficiency of the liquid outlet bucket.

[0027] In another aspect, the application further discloses a horizontal screw discharge sedimentation centrifuge, which comprises the inlet and outlet device according to any one of the above technical schemes.

[0028] The beneficial effects of the above technical scheme are that the horizontal screw discharge sedimentation centrifuge comprising the inlet and outlet device according to any one of the above technical schemes can effectively solve the problems of low solid-liquid separation capacity and separation efficiency caused by repeated mixing of solid and liquid in the inlet and outlet device of the horizontal screw discharge sedimentation centrifuge in the prior art, and serious crushing of fragile or flocculent soft solids, and the separation efficiency and separation capacity are significantly improved. BRIEF DESCRIPTION OF DRAWINGS

[0029] In order to more clearly illustrate the technical schemes in the embodiments of the application or the prior art, the drawings needed in the embodiments or the prior art description will be briefly introduced below. Obviously, the drawings in the following description are only some embodiments of the application, and those skilled in the art can obtain other drawings according to these drawings without creative labor.

[0030] Figure 1 It is a configuration schematic diagram of the inlet and outlet device of the application;

[0031] Figure 2 It is Figure 1 It is a partial enlarged schematic view of I in FIG. 1;

[0032] Figure 3 It is Figure 1 It is another partial enlarged schematic view of I in FIG. 1;

[0033] Figure 4 It is Figure 1 It is still another partial enlarged schematic view of I in FIG. 1;

[0034] The corresponding component names represented by the numbers in the drawings are as follows:

[0035] Raw slurry 01; solid phase residue 011; clarified liquid 012; bearing support 02; driving element 03; feed channel assembly 1; first feed pipe 11; liquid distribution disc 12; second feed pipe 13; sealing cover 14; rotating drum 2; feed liquid inlet 21; solid phase residue outlet 22; large-diameter end cover 23; first shaft 231; axial through hole 232; disc inner cavity 233; annular groove 234; variable-diameter rotating drum 24; small-diameter end cover 25; residue conveying screw 3; barrel 31; screw blade 32; discharge channel assembly 4; clarified liquid discharge pipeline 41; first reflux pipe 411; centrifugal pump 412; liquid inlet 4121; second reflux pipe 413; liquid outlet 414; solid phase residue collecting element 42. DETAILED DESCRIPTION

[0036] In order to facilitate the understanding of the present application, the present application will be described in more detail and in a more complete, detailed manner below in conjunction with the drawings and preferred embodiments of the present application, but the scope of protection of the present application is not limited to the following specific embodiments. It should be noted that the embodiments in the present application and the features in the embodiments can be combined with each other without conflict.

[0037] In order to achieve the purpose of the present application, the technical scheme provided by the present application is:

[0038] In some embodiments of the present application, as shown in Figure 1 An inlet and outlet device for a horizontal screw discharge sedimentation centrifuge is disclosed, which comprises a feed channel assembly 1, a rotating drum 2, a residue conveying screw 3 and a discharge channel assembly 4. The rotating drum 2 is a hollow cavity body erected on a bearing support 02 and rotates under the drive of a driving element 03. The two ends of the rotating drum 2 along the axial direction are a large-diameter end and a small-diameter end, respectively. The large-diameter end is provided with a feed liquid inlet 21, and the small-diameter end is provided with a solid phase residue outlet 22. The residue conveying screw 3 is arranged in the cavity of the rotating drum 2 and rotates coaxially with the rotating drum 2. The feed channel assembly 1 is in communication with the feed liquid inlet 21 of the rotating drum 2 to transport raw slurry 01 to the rotating drum 2. The discharge channel assembly 4 comprises a clarified liquid discharge pipeline 41 and a solid phase residue collecting element 42. The clarified liquid discharge pipeline 41 is in communication with the inside of the rotating drum 2 to discharge the clarified liquid 012 separated from the raw slurry 01. The solid phase residue collecting element 42 is in communication with the solid phase residue outlet 22 to discharge the solid phase residue 011 separated from the raw slurry 01.

[0039] The beneficial effects of the above technical scheme are: the problems of low solid-liquid separation capacity and separation efficiency of the inlet and outlet devices of the horizontal screw discharge sedimentation centrifuge in the prior art are fully considered, the position and direction of the feed liquid inlet are adjusted to be directly communicated with the internal chamber of the drum, on the one hand, the centrifuge can avoid high-speed shearing of the solid phase slag by the cloth hole when the raw slurry liquid is fed, and on the other hand, the flushing of the raw slurry liquid to the separated liquid layer and solid phase layer in the drum is eliminated when the feed is fed, so that the separation capacity and separation effect of the centrifuge are effectively improved. Especially when the solid phase is a fragile or flocculent soft solid, the technical scheme maximally maintains the initial particle size and state of the solid phase in the raw slurry liquid, and the advantage is more prominent.

[0040] In some other embodiments of the present application, as shown in Figure 2 The drum 2 includes a large-diameter end cover 23, a variable-diameter rotating drum 24 and a small-diameter end cover 25, the feed liquid inlet 21 is arranged on the large-diameter end cover 23, and the feed liquid inlet 21 is arranged at the joint of the large-diameter end cover 23 and the variable-diameter rotating drum 24 close to one end of the internal chamber of the drum 2.

[0041] The beneficial effects of the above technical scheme are: the feed liquid inlet is arranged at the joint of the large-diameter end cover and the variable-diameter rotating drum close to one end of the internal chamber of the drum, on the one hand, the feed liquid inlet no longer enters the drum after being accelerated by the hollow cavity inside the slag conveying screw, thereby avoiding high-speed shearing of the raw slurry liquid by the cloth hole of the rotating slag conveying screw; on the other hand, in the internal chamber of the drum, under the action of centrifugal force, the solid phase slag is located at the outermost layer and adheres to the inner wall of the drum, the separated liquid phase, i.e. the clarified liquid, is located in the middle layer, the raw slurry liquid enters the drum through the feed liquid inlet of the technical scheme, the solid phase slag directly enters the area close to the inner wall of the drum, greatly reducing the probability of re-mixing of the solid phase slag and the clarified liquid, effectively improving the solid-liquid separation efficiency, and the un-separated liquid phase in the raw slurry liquid helps to push the solid phase slag adhering to the inner wall of the drum to gradually move to the solid phase slag outlet of the small-diameter end along the axial direction, and then gradually enter the middle layer to become the clarified liquid under the action of centrifugal force.

[0042] In some other embodiments of the present application, as shown in Figure 2 The outer side of the large-diameter end cover 23 is provided with a first shaft 231 for supporting rotation, the center of the first shaft 231 is provided with an axial through hole 232, the one end of the axial through hole 232 is communicated with a disc inner cavity 233 with a diameter larger than the axial through hole 232, and the radial direction of the disc inner cavity 233 is communicated with the feed liquid inlet 21; the feed channel assembly 1 includes a first feed pipe 11 and a liquid distribution disc 12, the first feed pipe 11 is built in the axial through hole 232, the liquid distribution disc 12 is built in the disc inner cavity 233, the axial inlet of the liquid distribution disc 12 is fixedly connected with the first feed pipe 11, and the radial outlet of the liquid distribution disc 12 is communicated with the feed liquid inlet 21.

[0043] The beneficial effect of the above technical scheme is that the circumferential through hole is arranged at the center of the first shaft, and the disc inner cavity is matched, so that the purpose of conveying the raw slurry from the center of the rotating shaft of the rotating drum to the inside of the rotating drum is achieved, the influence of the rotation of the rotating drum on the arrangement of the feeding pipe is avoided, the feeding pipe is simple in configuration, and the cost is economical.

[0044] In some other embodiments of the present application, as shown in Figure 2 The sludge conveying screw 3 includes a cylinder 31 and a spiral blade 32, the cylinder 31 is a variable-diameter cylinder, and the distribution directions of the large-diameter end and the small-diameter end of the cylinder 31 are consistent with the distribution directions of the large-diameter end and the small-diameter end of the rotating drum 2; the clear liquid discharge pipeline 41 includes a first backflow pipe 411, the first backflow pipe 411 is arranged in the cavity of the rotating drum 2, and the first backflow pipe 411 is close to the cylinder 31.

[0045] The beneficial effect of the above technical scheme is that, on the one hand, the variable-diameter direction of the cylinder of the sludge conveying screw is consistent with the variable-diameter direction of the variable-diameter rotating drum, which facilitates the spiral blade to gradually push the solid-phase sludge on the inner wall of the variable-diameter rotating drum to move towards the solid-phase discharge port during rotation; on the other hand, the first backflow pipe is close to the cylinder of the sludge conveying screw, which facilitates the smooth discharge of the liquid phase that has been separated in the intermediate layer.

[0046] In some other embodiments of the present application, as shown in Figure 3 The clear liquid discharge pipeline 41 further includes a centrifugal pump 412, and the centrifugal pump 412 is coaxially arranged with the cylinder 31.

[0047] The beneficial effect of the above technical scheme is that the arrangement of the centrifugal pump can further accelerate the gathering of the liquid phase that has been separated in the intermediate layer in the clear liquid discharge pipeline, thereby further improving the solid-liquid separation efficiency.

[0048] In some other embodiments of the present application, as shown in Figure 3 The outer diameter of the centrifugal pump 412 is greater than the outer diameter of the cylinder 31, the liquid inlet 4121 of the centrifugal pump 412 is arranged on one side of the outer diameter of the centrifugal pump 412, and the liquid inlet 4121 faces the large-diameter end cover 23 of the rotating drum 2.

[0049] The beneficial effect of the above technical scheme is that the liquid inlet of the centrifugal pump is arranged to face the large-diameter end cover of the rotating drum, which is exactly opposite to the overall movement direction of the liquid phase that has been separated in the intermediate layer, which helps the liquid phase that has been separated to quickly enter the liquid inlet of the centrifugal pump, and then be quickly discharged through the centrifugal pump and the clear liquid discharge pipeline, thereby further improving the solid-liquid separation efficiency.

[0050] In some other embodiments of the present application, as shown in Figure 3As shown, the liquid outlet of the centrifugal pump 412 is arranged at the center of the side of the centrifugal pump 412 facing the large-diameter end cover 23; the clear liquid discharge pipeline 41 further comprises a second return pipe 413, one end of the second return pipe 413 is fixedly connected with the liquid outlet of the centrifugal pump 412, and the other end of the second return pipe 413 extends to the outside through the first feeding pipe 11.

[0051] The beneficial effects of the above technical scheme are that the second return pipe is arranged to extend to the outside through the first feeding pipe, which can realize that the first feeding pipe and the second return pipe are coaxial and located at the common rotation center of the rotating drum and the slag conveying screw, and is beneficial to the arrangement of the second return pipe to avoid the influence of the rotation of the rotating drum and the slag conveying screw.

[0052] In some other embodiments of the present application, as shown in Figure 4 The large-diameter end cover 23 is provided with an annular groove 234 at the periphery of the first shaft 231, and the one end of the feed liquid inlet 21 facing the outside is arranged at the side of the annular groove 234 facing the first shaft 231; the feeding channel assembly 1 further comprises a second feeding pipe 13 and a sealing cover 14, the sealing cover 14 is arranged at the periphery of the feed liquid inlet 21, and the second feeding pipe 13 communicates with the feed liquid inlet 21 from the outside through the sealing cover 14.

[0053] The beneficial effects of the above technical scheme are that the annular groove is arranged, and the one end of the feed liquid inlet facing the outside is arranged at the side of the annular groove facing the first shaft, which is helpful to arrange the outlet of the feeding pipe to cooperate with the feed liquid inlet in the direction away from the rotation center to supply liquid, so as to promote the raw slurry to quickly enter the cavity inside the rotating drum in the centrifugal direction.

[0054] In some other embodiments of the present application, as shown in Figure 4 The clear liquid discharge pipeline 41 further comprises a liquid outlet 414 corresponding to the outlet of the first return pipe 411.

[0055] The beneficial effects of the above technical scheme are that the liquid outlet is arranged, which is helpful to receive and concentrate the separated liquid phase discharged by the first return pipe, so as to realize the purpose of solid-liquid phase separation and separate collection.

[0056] In some other embodiments of the present application, as shown in Figure 2 The outlet of the first return pipe 411 is arranged on the side of the variable-diameter rotating drum 24 close to the large-diameter end cover 23, and the liquid outlet 414 is arranged below the outlet of the first return pipe 411.

[0057] The beneficial effects of the above technical scheme are that the first return pipe is arranged on the side of the variable-diameter rotating drum close to the large-diameter end cover, which is discharged downward during rotation and cooperates with the liquid outlet arranged below, so as to avoid the splashing of the discharged clarified liquid, and can improve the collection efficiency of the liquid outlet.

[0058] In some other embodiments of the present application, a horizontal screw discharge decanter centrifuge is further disclosed, which comprises the inlet and outlet device of any one of the above technical solutions.

[0059] The horizontal screw discharge decanter centrifuge comprising the inlet and outlet device of any one of the above technical solutions can effectively solve the problems of the existing horizontal screw discharge decanter centrifuge, such as the repeated mixing of solid and liquid phases, the low separation efficiency and capacity, and the serious crushing of fragile or flocculent soft solids, and the separation efficiency and capacity are significantly improved.

[0060] The above embodiments are only for illustrating the technical concept and characteristics of the present application, and the purpose is to enable those skilled in the art to understand the content of the present application and implement it, and cannot limit the protection scope of the present application. Any equivalent changes or modifications made according to the spirit and essence of the present application should be covered within the protection scope of the present application.

Claims

1. A feeding and discharging device for a horizontal spiral unloading sedimentation centrifuge, characterized in that: include: Feed channel assembly, drum, slag conveying screw and discharge channel assembly; The drum is a hollow cavity mounted on a bearing bracket and rotated by a driving element; the two ends of the drum along the axial direction are respectively a large diameter end and a small diameter end, the large diameter end is provided with a liquid inlet, and the small diameter end is provided with a solid slag outlet; The slag conveying screw is arranged in the cavity of the drum, and the slag conveying screw rotates coaxially with the drum; The feed channel assembly is connected to the liquid inlet of the drum and is used to transport the raw slurry to the drum; The discharge channel assembly includes a clear liquid discharge pipeline and a solid phase slag collecting element. The clear liquid discharge pipeline is connected to the interior of the drum; the solid phase slag collecting element is connected to the solid phase slag outlet; wherein, The drum comprises a large-diameter end cover, a variable-diameter drum and a small-diameter end cover, the liquid feed inlet is provided on the large-diameter end cover, and one end of the liquid feed inlet close to the cavity of the drum is provided at the junction of the large-diameter end cover and the variable-diameter drum; and The outer side of the large-diameter end cover is provided with a first shaft for supporting rotation, and the center of the first shaft is provided with an axial through hole, and the axial through hole is close to the end of the variable-diameter rotating cylinder and is connected to a disc inner cavity with a diameter larger than the axial through hole, and the radial direction of the disc inner cavity is connected to the liquid inlet; the feed channel assembly includes a first feed pipe and a liquid separator, the first feed pipe is built into the axial through hole, the liquid separator is built into the disc inner cavity, the axial inlet of the liquid separator is fixedly connected to the first feed pipe, and the radial outlet of the liquid separator is connected to the liquid inlet; wherein, The slag conveying spiral includes a cylinder and spiral blades. The cylinder is a variable diameter cylinder, and the distribution direction of the large diameter end and the small diameter end of the cylinder is consistent with the distribution direction of the large diameter end and the small diameter end of the drum. The clear liquid discharge pipeline includes a first reflux pipe, which is arranged in the cavity of the drum and is close to the cylinder.

2. The feeding and discharging device for a horizontal spiral unloading sedimentation centrifuge according to claim 1, characterized in that The clear liquid discharge pipeline also includes a centripetal pump, which is coaxially arranged with the cylinder.

3. The feeding and discharging device for a horizontal spiral unloading sedimentation centrifuge according to claim 2, characterized in that The outer diameter of the centripetal pump is larger than the outer diameter of the cylinder, and the liquid inlet of the centripetal pump is arranged on the outer diameter side of the centripetal pump, and the liquid inlet faces the large diameter end cover of the drum.

4. The feeding and discharging device for a horizontal spiral unloading sedimentation centrifuge according to claim 3, characterized in that The liquid outlet of the centripetal pump is arranged at the center of the side of the centripetal pump facing the large-diameter end cover; the clear liquid discharge pipeline also includes a second reflux pipe, one end of the second reflux pipe is fixedly connected to the liquid outlet of the centripetal pump, and the other end of the second reflux pipe passes through the first feed pipe and extends to the outside.

5. The feeding and discharging device for a horizontal spiral unloading sedimentation centrifuge according to claim 1, characterized in that The large-diameter end cover is provided with an annular groove on the periphery of the first shaft rod, and the end of the liquid feed inlet facing outward is provided on the side of the annular groove facing the first shaft rod; the feed channel assembly also includes a second feed pipe and a sealing cover, the sealing cover is provided on the periphery of the liquid feed inlet, and the second feed pipe passes through the sealing cover from the outside to communicate with the liquid feed inlet.

6. The feeding and discharging device for a horizontal spiral unloading sedimentation centrifuge according to claim 1 or 4, characterized in that: The clear liquid discharge pipeline further includes a liquid outlet hopper, and the liquid outlet hopper is configured corresponding to the outlet of the first reflux pipe.

7. The feeding and discharging device for a horizontal spiral unloading sedimentation centrifuge according to claim 6, characterized in that The outlet of the first reflux pipe is arranged on the side of the variable diameter drum close to the large diameter end cover, and the liquid outlet hopper is arranged below the outlet of the first reflux pipe.

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