Online anti-blocking device for sand remover

Abstract

The utility model relates to the technical field of paper pulp processing, in particular to a desander online anti-blocking device which comprises a support, a desander online anti-blocking device, a desander online anti-blocking device, a desander online anti-blocking device and a desander online anti-blocking device. The slurry inlet pipe is connected with the support, a plurality of branch sand removers are connected to the slurry inlet pipe, slurry outlets in the upper ends of the branch sand removers are connected with the accepted slurry pipe, and slurry outlets in the lower ends of the branch sand removers are connected with the slag slurry pipe; the back-flushing water pipe is connected with the support, the back-flushing water pipe is communicated with the branch sand remover through a connecting pipe, and the communicating position of the connecting pipe and the branch sand remover is arranged right opposite to the filter screen in the branch sand remover; the automatic regulating valves are connected to the connecting pipes so as to control the opening and closing states of the connecting pipes; the sand remover has the advantages that regular cleaning and dredging of the filter screen can be achieved through cooperation of the back-flushing water pipe, the connecting pipe and the automatic adjusting valve, and then the possibility that the appearance quality of finished paper is reduced due to the fact that the filter screen of the sand remover is blocked and is not treated in time is reduced.

Description

Technical Field

[0001] This application relates to the field of pulp processing technology, and in particular to an online anti-clogging device for a sand separator. Background Technology

[0002] With increasing environmental awareness, some reusable resources, such as paper, are being recycled and reused through waste paper pulping. Waste paper pulping is an environmentally friendly and resource-efficient process that reduces forest resource consumption and environmental pollution by recycling waste paper into pulp. The process includes waste paper collection, sorting, shredding, deinking, screening and purification, bleaching (optional), and concentration.

[0003] In the screening and purification process, a low-consistency desander is needed to remove heavy impurities such as sand and gravel from the pulp. Existing technology discloses a pulp desander comprising a cylindrical desanding shell and a slag discharge device located at the lower end of the cylindrical desanding shell. The upper sidewall of the cylindrical desanding shell has a pulp inlet pipe connected to the upper part of the shell. The top of the shell has a good pulp outlet. The slag discharge device includes a sedimentation pipe, an upper slag discharge valve, and a lower slag discharge valve. The two ends of the upper slag discharge valve are connected to the lower end of the cylindrical desanding shell and the upper end of the sedimentation pipe, respectively. The upper end of the lower slag discharge valve is connected to the lower end of the sedimentation pipe. The lower inner diameter of the cylindrical desanding shell gradually narrows to form an inverted frustum-shaped rotating acceleration tube. The upper end of the upper slag discharge valve is connected to the lower end of this rotating acceleration tube.

[0004] Regarding the aforementioned technologies, existing sand separators often experience blockages during actual use due to factors such as fluctuations in pulp concentration, pump pressure, and changes in impurity content in the pulp. If a sand separator becomes blocked and is not cleared in time, it will eventually cause other sand separators to become blocked due to increased load. Impurities in the pulp cannot be discharged, resulting in a large amount of impurities in the pulp, which affects the appearance quality of the finished paper. Utility Model Content

[0005] In order to reduce the possibility of a decline in the appearance quality of paper due to the failure to promptly address the clogging of the sand separator filter, this application provides an online anti-clogging device for the sand separator.

[0006] The online anti-clogging device for a sand separator provided in this application adopts the following technical solution:

[0007] An online anti-clogging device for a sand separator includes:

[0008] A support frame on which a good slurry pipe and a slag slurry pipe are mounted;

[0009] The slurry inlet pipe is connected to the support, and multiple branch sand separators are connected to the slurry inlet pipe. The upper slurry outlet of the branch sand separator is connected to the good slurry pipe, and the lower slurry outlet of the branch sand separator is connected to the slag slurry pipe.

[0010] A backwash water pipe is connected to the bracket, and the backwash water pipe is connected to the branch sand separator through a connecting pipe. The connection point between the connecting pipe and the branch sand separator is positioned directly opposite the filter screen inside the branch sand separator.

[0011] Multiple automatic regulating valves are connected to the connecting pipe to control the opening and closing state of the connecting pipe.

[0012] By adopting the above technical solution, the mixed slurry enters the branch desander through the slurry inlet pipe and undergoes a rotary separation process. Larger impurities such as sand and gravel adhere to the inner wall of the branch desander under centrifugal force and gradually flow downwards along the conical sidewall into the slurry pipe. Good pulp enters the good pulp pipe for later use. After a period of use, the filter screen of the branch desander may become clogged with sand and gravel. If the operator does not promptly open the connecting pipe to backwash the filter screen, it can lead to clogging of other branch desanders. However, with the automatic regulating valve, such as by timed opening, this can be prevented without operator intervention. The manual start-up reduces the possibility of decreased paper quality due to untreated clogging of the desander filter. The designed online anti-clogging device for the desander facilitates the installation of the good pulp pipe, sludge pipe, and branch desander via a bracket. Waste paper pulp is fed into the branch desander through the pulp inlet pipe, which separates the good pulp from the sludge, reducing the possibility of impurities such as sand and gravel affecting pulp quality. The backwash water pipe, connecting pipe, and automatic regulating valve enable regular cleaning and unclogging of the filter, further reducing the possibility of decreased paper quality due to untreated clogging of the branch desander filter.

[0013] In one specific implementation, a pressure gauge is installed on the connecting pipe, the pressure gauge is electrically connected to the automatic regulating valve via a controller, and the pressure gauge and the connecting pipe are connected in the area between the backwash water pipe and the automatic regulating valve.

[0014] By adopting the above technical solution, the designed pressure detection gauge can detect the increase in water pressure in the connecting pipe when the filter screen is clogged. Then, the controller will open the automatic regulating valve to complete the filter screen cleaning work and reduce the number of ineffective backwashings to a certain extent.

[0015] In one specific implementation, an alarm is connected to the branch sand separator, and the alarm is electrically connected to the pressure gauge via a controller.

[0016] By adopting the above technical solution, the designed warning device can physically alert staff when the filter screen becomes clogged, and then conduct further manual inspection on the basis of backwashing to ensure the smooth implementation of the filter screen cleaning work.

[0017] In one specific implementation, the warning device is configured as a warning light or a buzzer.

[0018] By adopting the above technical solutions, the designed alarm device, which is set as a warning light or buzzer, can effectively remind staff.

[0019] In one specific implementation, the branch sand separator is connected to an annular sand storage cylinder, the lower edge of the annular sand storage cylinder communicating with the branch sand separator is flush with the filter screen, and the bottom wall of the annular sand storage cylinder is lower than the plane where the filter screen is located.

[0020] By adopting the above technical solution, the designed annular sand storage cylinder allows sand and gravel to be temporarily stored inside after backwashing, which is equivalent to indirectly increasing the surface area of ​​the filter screen, thereby reducing the number of times the filter screen needs to be disassembled, cleaned, and desanded.

[0021] In one specific implementation, the inner wall of the branch sand separator is coated with a wear-resistant layer.

[0022] By adopting the above technical solution, the designed wear-resistant layer can effectively extend the service life of the branch sand separator.

[0023] In one specific implementation, multiple branch desanders are arranged in two rows, and the slurry inlet pipe, the good slurry pipe, and the backwash water pipe are all located between the two rows of branch desanders.

[0024] By adopting the above technical solutions, the space utilization of the workshop can be effectively realized.

[0025] In one specific implementation, the connection point between the connecting pipe and the branch sand separator is located above the filter screen inside the branch sand separator.

[0026] By adopting the above technical solution, the sand and gravel can be flushed into the slurry pipe as much as possible while completing the sand and gravel cleaning operation on the filter screen.

[0027] In summary, this application includes at least one of the following beneficial technical effects:

[0028] 1. The designed online anti-clogging device for the sand separator facilitates the installation of the good pulp pipe, the sludge pipe, and the branch sand separator via a bracket. Waste paper pulp can be fed into the branch sand separator through the pulp inlet pipe. The branch sand separator can separate the good pulp and sludge in the waste paper pulp, reducing the possibility of impurities such as sand and gravel affecting the quality of the pulp. With the cooperation of the backwash water pipe, connecting pipe, and automatic regulating valve, the filter screen can be cleaned and unblocked regularly, thereby reducing the possibility of a decline in the appearance quality of the paper due to the failure to deal with the clogging of the sand separator filter screen in time.

[0029] 2. The designed online anti-clogging device for the sand separator can detect the increase in water pressure in the connecting pipe when the filter screen becomes clogged using a pressure gauge. Then, the controller will open the automatic regulating valve to complete the filter screen cleaning and reduce the number of ineffective backwashing cycles to some extent.

[0030] 3. The designed online anti-clogging device for the sand separator uses an annular sand storage cylinder. After backwashing, the sand and gravel can be temporarily stored inside the annular sand storage cylinder, which is equivalent to indirectly increasing the surface area of ​​the filter screen, thereby reducing the number of times the filter screen needs to be disassembled, cleaned, and desanded. Attached Figure Description

[0031] Figure 1 This is a schematic diagram of the online anti-clogging device for the sand separator in an embodiment of this application.

[0032] Figure 2 yes Figure 1 A sectional view.

[0033] Figure 3 yes Figure 1 A three-dimensional structural diagram.

[0034] Explanation of reference numerals in the attached drawings: 1. Support; 2. Good slurry pipe; 3. Slurry pipe; 4. Slurry inlet pipe; 5. Branch sand separator; 51. Warning device; 52. Annular sand storage cylinder; 6. Backflush water pipe; 7. Connecting pipe; 71. Automatic regulating valve; 72. Pressure gauge. Detailed Implementation

[0035] The following is in conjunction with the appendix Figure 1-3 This application will be described in further detail.

[0036] This application discloses an online anti-clogging device for a sand separator.

[0037] Reference Figure 1An online anti-clogging device for a sand separator includes a support 1, a good slurry pipe 2, a slag slurry pipe 3, a slurry inlet pipe 4, and multiple branch sand separators 5. The good slurry pipe 2, the slag slurry pipe 3, and the slurry inlet pipe 4 are all bolted to the support 1, with the good slurry pipe 2 located above the slurry inlet pipe 4. The inner wall of the branch sand separator 5 is coated with a wear-resistant layer to extend the service life of the branch sand separator 5. The multiple branch sand separators 5 are arranged in two rows, with the slurry inlet pipe 4 and the good slurry pipe 2 located between the two rows of branch sand separators 5. The good slurry pipe 2 is connected to the upper slurry outlet of the branch sand separator 5, the slurry inlet pipe 4 is connected to the upper slurry inlet of the branch sand separator 5, and the slag slurry pipe 3 is connected to the lower slurry outlet of the branch sand separator 5. There are two slag slurry pipes 3.

[0038] Reference Figure 1 and Figure 2 In order to achieve the cleaning of the filter screen inside the branch sand separator 5, the online anti-clogging device of the sand separator also includes a backwash water pipe 6, a connecting pipe 7, and an automatic regulating valve 71. The backwash water pipe 6 is fixed to the bracket 1 by a metal strap, and the backwash water pipe 6 is connected to the branch sand separator 5 by the connecting pipe 7. The connection point between the connecting pipe 7 and the branch sand separator 5 is set directly opposite the filter screen inside the branch sand separator 5. The number of connecting pipes 7 is the same as the number of branch sand separators 5. The automatic regulating valve 71 is flanged and connected to the connecting pipe 7 to control the opening and closing state of the connecting pipe 7. The number of automatic regulating valves 71 is the same as the number of connecting pipes 7. In this application, the automatic regulating valve 71 can be a solenoid valve or a pneumatic valve, as long as it can achieve automatic opening and closing.

[0039] Reference Figure 2 Furthermore, the connection point between the connecting pipe 7 and the branch sand separator 5 is located above the filter screen inside the branch sand separator 5, and the backwash water jet from the connecting pipe 7 is directed downwards towards the filter screen; thus, while completing the sand and gravel removal operation on the filter screen, the sand and gravel are flushed into the slurry pipe 3 as much as possible; in addition, an annular sand storage cylinder 52 is welded and fixed on the branch sand separator 5, the inner cavity of the annular sand storage cylinder 52 is connected to the inner cavity of the branch sand separator 5, and the lower edge of the connection between the annular sand storage cylinder 52 and the branch sand separator 5 is flush with the filter screen. The bottom wall of the annular sand storage cylinder 52 is lower than the plane where the filter screen is located, so that the sand and gravel on the filter screen are flushed into the annular sand storage cylinder 52 during flushing; after backwashing, the sand and gravel can be temporarily stored in the annular sand storage cylinder 52, which is equivalent to indirectly increasing the surface area of ​​the filter screen, thereby reducing the number of times the filter screen needs to be disassembled, cleaned and desanded.

[0040] Reference Figure 2A pressure gauge 72 is connected to the flange on the connecting pipe 7. The pressure gauge 72 is electrically connected to the automatic regulating valve 71 via a PLC programmable controller. The pressure gauge 72 and the connecting pipe 7 are located in the area between the backwash water pipe 6 and the automatic regulating valve 71. That is, in terms of the liquid flow direction in the connecting pipe 7, the pressure gauge 72 is located upstream of the automatic regulating valve 71. Through the pressure gauge 72, the increase in water pressure in the connecting pipe 7 can be detected when the filter screen is clogged. Then, the controller controls the opening of the automatic regulating valve 71 to complete the filter screen cleaning work and reduce the number of ineffective backwashings to a certain extent.

[0041] Reference Figure 2 and Figure 3 Furthermore, a warning device 51 is bolted to the branch sand separator 5. The warning device 51 is electrically connected to the pressure gauge 72 via a PLC programmable controller. Specifically, the warning device 51 is set as a warning light or a buzzer. The warning device 51 can physically remind the staff when the filter screen is clogged, and then, based on the backwashing and unclogging, further manual inspection can be carried out to ensure the smooth implementation of the filter screen unclogging work.

[0042] The implementation principle of the online anti-clogging device for a desander in this application embodiment is as follows: The mixed slurry enters the branch desander 5 through the slurry inlet pipe 4 and undergoes a rotary separation motion. Larger impurities such as sand and gravel adhere to the inner wall of the branch desander 5 under centrifugal force and gradually flow downwards along the conical sidewall into the slurry pipe 3. Good pulp enters the good pulp pipe 2 for later use. After the branch desander 5 has been used for a period of time, the filter screen on the branch desander 5 may become clogged with sand and gravel. If the operator does not open the connecting pipe 7 in time to backwash the filter screen, it will lead to clogging of the remaining branch desanders 5. However, under the action of the automatic regulating valve 71, for example by a timer... The system can be opened without manual intervention, reducing the possibility of decreased paper quality due to clogged filter screens. The bracket 1 facilitates the installation of the good pulp pipe 2, the sludge pipe 3, and the branch desander 5. Waste paper pulp is fed into the branch desander 5 via the inlet pipe 4, which separates the good pulp from the sludge, reducing the likelihood of impurities like sand affecting pulp quality. The backwash pipe 6, connecting pipe 7, and automatic regulating valve 71 enable regular cleaning and unclogging of the filter screen, further reducing the possibility of decreased paper quality due to clogged filter screens in the branch desander 5.

[0043] The above are all preferred embodiments of this application, and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. An on-line anti-clogging device for a desander, characterized by: The utility model relates to a kind of sand removal device, including: Support (1), slurry pipe (2) and slag slurry pipe (3) are installed on the support (1); Slurry inlet pipe (4) is connected with the support (1), and a plurality of branch sand removers (5) are connected on the slurry inlet pipe (4), the upper end of the branch sand removers (5) is connected with the slurry pipe (2), and the lower end of the branch sand removers (5) is connected with the slag slurry pipe (3); Backflushing water pipe (6) is connected with the support (1), the backflushing water pipe (6) is communicated with the branch sand removers (5) by connecting pipe (7), and the connecting pipe (7) is opposite the filter screen in the branch sand removers (5) with the communication of the branch sand removers (5); A plurality of automatic regulating valves (71) are connected on the connecting pipe (7) to control the opening and closing state of the connecting pipe (7).

2. The sand eliminator online anti-clogging device according to claim 1, characterized in that: Pressure detection table (72) is installed on the connecting pipe (7), the pressure detection table (72) is electrically connected between the automatic regulating valve (71) and the controller, and the pressure detection table (72) is connected with the connecting pipe (7) between the backflushing water pipe (6) and automatic regulating valve (71).

3. The sand eliminator online anti-clogging device according to claim 2, characterized in that: Warning indicator (51) is connected on the branch sand remover (5), and the warning indicator (51) is electrically connected between the pressure detection table (72) and the controller.

4. The sand eliminator online anti-clogging device according to claim 3, characterized in that: The warning indicator (51) is set as warning light or buzzer.

5. The sand eliminator online anti-clogging device according to claim 1, characterized in that: Annular sand storage cylinder (52) is connected on the branch sand remover (5), the lower edge of the annular sand storage cylinder (52) is flush with the filter screen with the communication of the branch sand remover (5), and the bottom wall of the annular sand storage cylinder (52) is lower than the plane where the filter screen is located.

6. The sand eliminator online anti-clogging device according to any one of claims 1-5, characterized in that: Abrasion-resistant layer is coated on the inner wall of the branch sand remover (5).

7. The sand eliminator online anti-clogging device according to any one of claims 1-5, characterized in that: A plurality of branch sand removers (5) are divided into two rows, and the slurry inlet pipe (4), the slurry pipe (2) and the backflushing water pipe (6) are located between the two rows of branch sand removers (5).

8. The sand eliminator online anti-clogging device according to any one of claims 1-5, characterized in that: The communication of the connecting pipe (7) and the branch sand remover (5) is located above the filter screen in the branch sand remover (5).

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