Efficient desanding system for pulping

Abstract

An efficient desanding system for pulping comprises a base plate and a supporting frame, the supporting frame is arranged on the base plate, a desander is arranged on the supporting frame, a flow controller is arranged at the lower end of the desander, an input pipe is arranged on the upper portion of the desander, an output pipe is arranged at the top end of the desander, and a first water pump is arranged on the input pipe; an integrated pipe is arranged below the throttler, a temporary storage structure is arranged below the integrated pipe, a receiving hopper is arranged below the temporary storage structure, a material distributing bin is arranged below the receiving hopper, and a collecting groove is formed in the bottom end of the material distributing bin. The sand discharging flow speed is accurately controlled through the throttler, and the slurry retention time is prolonged; the ash content of the tailings is increased from 50% to 70% or above by combining periodic pouring of the buffer structure and initial-speed separation of the material separation bin, and the subsequent treatment cost is reduced; the slurry waste is reduced by more than 15% through the design of the circulating pipe, and the overall desanding efficiency is improved by 30%.

Description

Technical Field

[0001] The invention relates to the technical field of sand removal equipment for waste paper pulping, and in particular to a high-efficiency sand removal system for pulping. Background Art

[0002] Papermaking is divided into two basic processes: pulping and papermaking. Pulping is the process of breaking down plant fiber raw materials into natural pulp or bleached pulp, while papermaking is the process of processing pulp fibers suspended in water into paper sheets. Waste newspapers undergo pulping, screening, deinking, and sand removal during pulping. The desander is the main processing equipment in the sand removal process. Its inner wall is a smooth conical body. It uses the centrifugal force generated by the tangential pulp to remove sand particles or impurities with high specific gravity.

[0003] During the pulping process, especially when waste paper is used for pulping, the pulp often contains various solid impurities such as sand, fine fiber fragments, staples, iron blocks, etc. The presence of these impurities can have many adverse effects on subsequent pulp processing and production. For example, if impurities such as sand are not removed in time, they will accelerate the wear of subsequent equipment, such as the wear of the three-phase separator, and may also cause sand and gravel to accumulate in the anaerobic tank, requiring regular tank cleaning, increasing equipment maintenance costs and downtime. At the same time, impurities can also affect the quality of the paper, causing defects such as dust and holes in the paper, reducing the quality and market competitiveness of the paper.

[0004] At present, domestic waste paper raw materials are diversified, and there are more and more fillers in waste paper. In the process of processing, the traditional desander has no special design at the sand discharge port, which causes the tailings and part of the pulp to be discharged directly into the collection tank. The ash content of the tailings is low, and subsequent processing steps are required before the tailings can be sent to incineration. The processing efficiency is low. At the same time, the fine fillers will flow out from the output pipe along with the pulp and water, resulting in a large amount of impurities in the produced base paper fillers, affecting the product quality. In order to solve the above problems, an efficient pulping and desanding system is proposed. Summary of the Invention

[0005] In response to the above technical problems, the present invention provides a pulping high-efficiency sand removal system, comprising a base plate and a support frame, wherein the support frame is provided on the base plate, a desander is provided on the support frame, a throttle is provided at the lower end of the desander, an inlet pipe is provided at the upper part of the desander, an outlet pipe is provided at the top end of the desander, and a first water pump is provided on the inlet pipe;

[0006] Furthermore, an integrated pipe is provided below the throttle, a buffer structure is provided below the integrated pipe, a receiving funnel is provided below the buffer structure, a distribution bin is provided below the receiving funnel, a collecting trough is provided at the bottom end of the distribution bin, and a three-way pipe is provided below the collecting trough;

[0007] Furthermore, a circulation pipe is provided at one outlet of the tee pipe, the other end of the circulation pipe is connected to the input pipe, and a second water pump is provided on the circulation pipe for driving the flow of materials in the circulation pipe;

[0008] Furthermore, a concentration tank is provided at the other outlet of the tee pipe, a foldable cover is provided on the concentration tank, a feeding port is provided on the concentration tank, and a drainage pipe is provided on the side of the concentration tank;

[0009] Furthermore, the desander is fixedly mounted on a support frame, there are a plurality of desanders, the input pipe is connected to the plurality of desanders via a diverter, the input pipe is connected to the outside world, and slurry is input from the outside world into the desander via a first water pump;

[0010] Furthermore, the upper end of each desander has an interface connected to an output pipe, and the output pipe is connected to the outside world;

[0011] Furthermore, a throttle is provided at the lower end of each desander through a thread. The throttle has a valve for adjusting the flow rate of sand discharged from the desander. The lower end of each throttle is connected to an integrated pipe through a pipe, and the outlet of the integrated pipe is located directly above the buffer structure.

[0012] Furthermore, the cache structure is fixedly connected to the support frame, and a closed cavity is provided in the cache structure. Electric valves are provided at the upper and lower ends of the cache structure for controlling the feeding and discharging of the cache structure. A receiving funnel is provided below the cache structure, and the receiving funnel is fixedly provided on the support frame. A guide tube is provided at the bottom of the receiving funnel, facing the side wall of the distribution bin;

[0013] Furthermore, the upper part of the sub-bin is provided with a discharge pipe with a valve for discharging light impurities, the bottom of the sub-bin is provided with a collecting tank, and both outlets of the tee are provided with valve bodies for controlling the opening and closing of the outlet;

[0014] Furthermore, the concentration tank is located on the base plate, the top of the concentration tank has an opening, and a folding cover is provided at the opening through a rotating shaft, the folding cover has a handle, the feeding port has a cover installed with bolts, a drain pipe is provided in the middle of the side of the concentration tank, the drain pipe has a valve body for discharging the liquid in the concentration tank, the valve body is provided at the interface between the circulation pipe and the input pipe, for controlling the connection of the circulation pipe to the input pipe, and the valve bodies of the first water pump and the second water pump are controlled by an external controller.

[0015] Beneficial effects of the present invention:

[0016] The present invention installs a throttle with a valve at the bottom of each desander through a thread, and uses the valve to adjust the flow rate of sand discharged from the desander. The throttle at the lower end of the desander is adjusted to reduce the flow rate of sand and slurry discharged from the desander. When the throttle opening is 50%, the ash content is 70%, and when the throttle opening is 80%, the ash content is 55%. The sand and slurry in the desander can run in the desander for a longer time, more slurry can be discharged, and the ash content of the desander tailings is increased from the original 50% to more than 70%.

[0017] By using a buffer structure, a receiving funnel, and a distribution silo, water can be poured downward periodically, which not only ensures that the materials can enter the subsequent separation link in an orderly manner, but also provides sufficient time for the separation of materials in the distribution silo during the water storage process, reducing the interference of continuous feeding on the separation, making the entire material separation process more efficient and stable;

[0018] The design of the circulation pipe allows part of the material to be recycled, reducing material waste and improving overall processing efficiency and material utilization. The circulation pipe design reduces slurry waste by more than 15% and increases the overall sand removal efficiency by 30%, making sand removal more efficient. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 This is a schematic diagram of the overall structure of a pulping and high-efficiency sand removal system of the present invention;

[0020] Figure 2 This is a schematic diagram of the structure of a desander in a pulping high-efficiency desanding system according to the present invention;

[0021] Figure 3 This is a structural schematic diagram of a receiving funnel and a material distribution bin of a pulping high-efficiency sand removal system according to the present invention;

[0022] Figure 4 This is a schematic diagram of the three-way pipe structure of a pulping and high-efficiency sand removal system of the present invention;

[0023] As shown in the figure: 1. Base plate; 2. Support frame; 3. Desander; 4. Throttle; 5. Inlet pipe; 6. Outlet pipe; 7. First water pump; 8. Integrated pipe; 9. Buffer structure; 10. Receiving funnel; 11. Distribution silo; 12. Collection tank; 13. Tee pipe; 14. Circulation pipe; 15. Second water pump; 16. Concentration tank; 17. Folding cover; 18. Feeding port; 19. Drain pipe. DETAILED DESCRIPTION

[0024] The technical solution of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the embodiments described are only some embodiments of the present invention, not all embodiments. All other embodiments obtained by ordinary technicians in this field based on the embodiments of the present invention without making any creative efforts shall fall within the scope of protection of the present invention.

[0025] In the description of the present invention, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings and are intended solely to facilitate and simplify the description of the present invention. They are not intended to indicate or imply that the devices or components referred to must have, be constructed, or operate in a specific orientation, and therefore should not be construed as limitations on the present invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0026] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be internal communication between two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances. In addition, the technical features involved in the different embodiments of the present invention described below can be combined with each other as long as they do not conflict with each other.

[0027] Example 1

[0028] The present invention provides a pulping high-efficiency sand removal system, comprising a base plate 1 and a support frame 2, wherein the support frame 2 is arranged on the base plate 1, a desander 3 is arranged on the support frame 2, a throttle 4 is arranged at the lower end of the desander 3, an inlet pipe 5 is arranged at the upper part of the desander 3, an outlet pipe 6 is arranged at the top end of the desander 3, and a first water pump 7 is arranged on the inlet pipe 5;

[0029] Furthermore, an integrated pipe 8 is provided below the throttle 4, a buffer structure 9 is provided below the integrated pipe 8, a receiving funnel 10 is provided below the buffer structure 9, a distribution bin 11 is provided below the receiving funnel 10, a collecting tank 12 is provided at the bottom end of the distribution bin 11, and a three-way pipe 13 is provided below the collecting tank 12;

[0030] Furthermore, a circulation pipe 14 is provided at one outlet of the tee pipe 13, the other end of the circulation pipe 14 is connected to the input pipe 5, and a second water pump 15 is provided on the circulation pipe 14 for driving the flow of materials in the circulation pipe 14;

[0031] Furthermore, a concentration tank 16 is provided at the other outlet of the tee pipe 13. A foldable cover 17 is provided on the concentration tank 16. A feeding port 18 is provided on the concentration tank 16. A drainage pipe 19 is provided on the side of the concentration tank 16.

[0032] Furthermore, the desander 3 is fixedly mounted on the support frame 2. There are several desanders 3. The input pipe 5 is connected to the several desanders 3 through a diverter. The input pipe 5 is connected to the outside world and the slurry is input from the outside world to the desander 3 through the first water pump 7.

[0033] Furthermore, the upper end of each desander 3 has an interface connected to an output pipe 6, and the output pipe 6 is connected to the outside world;

[0034] Furthermore, a throttle 4 is provided at the lower end of each desander 3 through a thread. The throttle 4 has a valve for adjusting the flow rate of sand discharged from the desander 3. The lower end of each throttle 4 is connected to an integrated pipe 8 through a pipe. The outlet of the integrated pipe 8 is located directly above the buffer structure 9.

[0035] Furthermore, the cache structure 9 is fixedly connected to the support frame 2, and a closed cavity is provided in the cache structure 9. Electric valves are provided at the upper and lower ends of the cache structure 9 to control the feeding and discharging of the cache structure 9. A receiving funnel 10 is provided below the cache structure 9. The receiving funnel 10 is fixedly provided on the support frame 2, and a guide tube is provided at the bottom of the receiving funnel 10, facing the side wall of the distribution bin 11;

[0036] Furthermore, the upper part of the sub-bin 11 is provided with a discharge pipe with a valve for discharging light impurities, the bottom of the sub-bin 11 is provided with a collecting tank 12, and the two outlets of the tee pipe 13 are provided with valve bodies for controlling the opening and closing of the outlet;

[0037] Furthermore, the concentration tank 16 is located on the base plate 1, and the top of the concentration tank 16 has an opening, and a folding cover 17 is provided at the opening through a rotating shaft, the folding cover 17 has a handle, and the feeding port 18 has a cover installed with bolts, and a drain pipe 19 is provided in the middle of the side of the concentration tank 16, and the drain pipe 19 has a valve body for discharging the liquid in the concentration tank 16, and a valve body is provided at the interface between the circulation pipe 14 and the input pipe 5, which is used to control the circulation pipe 14 to be connected to the input pipe 5, and the valve bodies of the first water pump 7 and the second water pump 15 are controlled by an external controller.

[0038] Working principle:

[0039] During use, several desanders 3 are installed on the support frame 2 as needed, and then a throttle 4 with a valve is installed at the bottom of each desander 3 through a thread, and the valve is used to adjust the flow rate of sand discharged from the desander 3. An input pipe 5 is installed on the upper part of the desander 3, and a first water pump 7 is provided on the input pipe 5. The external slurry is input into the desander 3 through the first water pump 7, and the input pipe 5 can be connected to several desanders 3 through a diverter to ensure that the slurry can be reasonably distributed to each desander 3. An output pipe 6 is installed on the top of the desander 3, and the output pipe 6 is connected to the outside world so that the treated slurry can be discharged. The first water pump 7 is controlled to start and the external slurry containing impurities is transported to each desander 3 through the input pipe 5 and the diverter. Since the inner wall of the desander 3 is a smooth conical body, the centrifugal force generated by the tangential pulp is used to remove sand particles or impurities with a large specific gravity. The slurry after desanding is discharged from the output pipe 6 at the top of the desander 3. The throttle 4 at the lower end of the desander 3 is adjusted to reduce the flow rate of the sand and slurry discharged from the desander 3, so that the sand and slurry in the desander 3 can run in the desander 3 for a longer time, and more slurry can be discharged, so that the ash content of the tailings of the desander 3 is increased from the original 50% to more than 70%. The mixture of slurry and sand discharged from the throttle 4 enters the cache structure 9 through the integrated pipe 8. The upper end of the cache structure 9 is connected to the integrated pipe 8 and is controlled by an electric valve. After a certain amount of material is accumulated in the cache structure 9, the upper end The electric valve at the top is closed, and the electric valve at the lower end is opened, and the materials in the buffer structure 9 are all discharged into the receiving funnel 10 through the pipeline. This process is repeated to realize periodic pouring of water downward, and the mixed material in the receiving funnel 10 enters the sub-bin 11 along the guide tube facing the side wall of the sub-bin 11. After entering the sub-bin 11, the mixed material has a horizontal initial velocity, so that the heavier sand in the mixed material quickly enters the collecting tank 12, and the lighter impurities float at the top and are discharged through the discharge pipe with a valve on the upper half of the sub-bin 11 for discharging light impurities. At this time, the valve body on the three-way pipe 13 leading to the concentration tank 16 is opened, and the sand in the collecting tank 12 enters the concentration tank 16 and is enriched in the concentration tank 16, waiting for subsequent processing. Close this valve body, open the other valve body, and under the action of the second pump body, the remaining slurry re-enters the input pipe 5 along the circulation pipe 14 to achieve recycling. In the above process, the slurry and sand entering the distribution bin 11 from the receiving funnel 10 have a certain initial velocity for separation. At the same time, during the water storage process of the buffer structure 9, there is sufficient time for separation in the distribution bin 11, reducing the interference of continuous feeding on the separation, and accurately controlling the sand discharge flow rate through the throttle 4 to extend the slurry residence time; combined with the periodic dumping of the buffer structure 9 and the initial velocity separation of the distribution bin 11, the ash content of the tailings is increased from 50% to more than 70%, reducing the subsequent processing cost; the design of the circulation pipe 14 reduces slurry waste by more than 15%, and the overall sand removal efficiency is improved by 30%.

[0040] The above shows and describes the basic principles, main features, and advantages of the present invention. The various components mentioned in the present invention are conventional technologies in the prior art. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The above embodiments and descriptions are merely illustrative of the principles of the present invention. Various changes and improvements may be made to the present invention without departing from the spirit and scope of the present invention. Such changes and improvements are intended to fall within the scope of the invention. The scope of protection claimed in the present invention is defined by the appended claims and their equivalents.

Claims

1. A pulping and high-efficiency sand removal system, comprising a base plate (1) and a support frame (2), characterized in that: A support frame (2) is provided on the base plate (1), a desander (3) is provided on the support frame (2), a throttle (4) is provided at the lower end of the desander (3), an input pipe (5) is provided on the upper part of the desander (3), an output pipe (6) is provided at the top end of the desander (3), a first water pump (7) is provided on the input pipe (5), an integrated pipe (8) is provided below the throttle (4), a cache structure (9) is provided below the integrated pipe (8), the cache structure (9) is used to store a certain amount of mixed material, a receiving funnel (10) is provided below the cache structure (9), a distribution bin (11) is provided below the receiving funnel (10), the distribution bin (11) is used to separate slurry and sand in the mixed material, a collecting trough (12) is provided at the bottom end of the distribution bin (11), and a three-way pipe (13) is provided below the collecting trough (12).

2. The pulping high-efficiency sand removal system according to claim 1, characterized in that: A circulation pipe (14) is provided at one outlet of the three-way pipe (13), the other end of the circulation pipe (14) is connected to the input pipe (5), and a second water pump (15) is provided on the circulation pipe (14) for driving the flow of materials in the circulation pipe (14).

3. The pulping high-efficiency sand removal system according to claim 2, characterized in that: The other outlet of the three-way pipe (13) is provided with a concentration box (16), a folding cover (17) is provided on the concentration box (16), a feeding port (18) is provided on the concentration box (16), and a drainage pipe (19) is provided on the side of the concentration box (16).

4. The pulping high-efficiency sand removal system according to claim 3, characterized in that: The desander (3) is fixedly arranged on the support frame (2), and there are a plurality of desanders (3). The input pipe (5) is connected to the plurality of desanders (3) through a diverter. The input pipe (5) is connected to the outside world and inputs slurry from the outside world into the desander (3) through a first water pump (7).

5. The pulping high-efficiency sand removal system according to claim 4, characterized in that: The upper end of each desander (3) is provided with an interface connected to an output pipe (6), and the output pipe (6) is connected to the outside world.

6. The pulping high-efficiency sand removal system according to claim 5, characterized in that: The lower end of each desander (3) is provided with a throttle (4) through a thread. The throttle (4) is provided with a valve for adjusting the flow rate of sand discharged from the desander (3). The lower end of each throttle (4) is connected to an integrated pipe (8) through a pipeline. The outlet of the integrated pipe (8) is located directly above the buffer structure (9).

7. The pulping high-efficiency sand removal system according to claim 6, characterized in that: The cache structure (9) is fixedly connected to the support frame (2), and a closed cavity is provided in the cache structure (9). Electric valves are provided at the upper and lower ends of the cache structure (9) for controlling the feeding and discharging of the cache structure (9). A receiving funnel (10) is provided below the cache structure (9), and the receiving funnel (10) is fixedly provided on the support frame (2). A guide tube is provided at the bottom of the receiving funnel (10) and faces the side wall of the distribution bin (11).

8. The pulping high-efficiency sand removal system according to claim 7, characterized in that: The upper part of the distribution bin (11) is provided with a discharge pipe with a valve for discharging light impurities, the bottom of the distribution bin (11) is provided with a collecting tank (12), and both outlets of the three-way pipe (13) are provided with valve bodies for controlling the opening and closing of the outlet.

9. The pulping high-efficiency sand removal system according to claim 8, characterized in that: The concentration tank (16) is located on the base plate (1). The top of the concentration tank (16) is provided with an opening, and a folding cover (17) is provided at the opening via a rotating shaft. The folding cover (17) is provided with a handle. The feeding port (18) is provided with a cover installed with bolts. A drain pipe (19) is provided in the middle of the side of the concentration tank (16). The drain pipe (19) is provided with a valve body for discharging liquid in the concentration tank (16). A valve body is provided at the interface between the circulation pipe (14) and the input pipe (5) for controlling the circulation pipe (14) to be connected to the input pipe (5). The valve bodies of the first water pump (7) and the second water pump (15) are controlled by an external controller.

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