A pulping OCC line and its low-concentration slag removal equipment

Abstract

The utility model relates to a pulping OCC line and a low-concentration slag removal device thereof. The low-concentration slag removal device comprises a slag trough, the slag trough is connected to the slurry discharge port of the four-stage low-concentration slag remover; a four-stage slag pump, the slurry inlet of the four-stage slag pump is connected to the slag trough; and a five-stage low-concentration slag remover, the slurry inlet of the five-stage low-concentration slag remover is connected to the slurry delivery port of the four-stage slag pump. The tailings fed in are precipitated by the slag trough to obtain low-concentration tailings with high fiber content; the low-concentration tailings in the slag trough are fed into the five-stage low-concentration slag remover for treatment by the four-stage slag pump, and the slag treated by the five-stage low-concentration slag remover is fed into a medium-concentration slag removal device for the next stage of slag removal. By adding a slag trough to store the tailings generated by the four-stage low-concentration slag remover, and then passing the five-stage low-concentration slag remover for slag removal, the fiber loss in the tailings can be reduced, the production capacity effect can be improved, and the cost per ton of paper can be saved.

Description

Technical Field

[0001] The present application relates to the technical field of papermaking, and in particular to a pulping OCC line and low-concentration slag removal equipment thereof. Background Art

[0002] Pulping OCC line, that is, the core pulp line of gray-coated white board paper, such as Figure 1 As shown, the existing pulping OCC line uses a four-stage low-concentration cleaner to remove the pulp. However, in the original pulping OCC line using the four-stage low-concentration cleaner, the tailings discharge volume is large and the discharge rate is low, resulting in more tailings fibers and large fiber loss, which in turn makes the papermaking manufacturing cost high. Utility Model Content

[0003] In view of the above problems, the present application provides a pulping OCC line and its low-concentration deslagging equipment to solve the problems of more tail pulp fibers, large fiber loss and high papermaking cost in the existing pulping OCC line using a four-stage low-concentration deslagging device to deslagging pulp.

[0004] To achieve the above object, the inventor provides a low-concentration slag removal device for a pulping OCC line, comprising:

[0005] A low-consistency cleaner, which is used to remove the slag from the incoming good pulp and then send it to the fine screening equipment;

[0006] A first-stage slurry pump, wherein the slurry inlet of the first-stage slurry pump is connected to the slurry discharge outlet of the first-stage low-consistency cleaner;

[0007] A second-stage low-concentration cleaner, wherein the slurry inlet of the second-stage low-concentration cleaner is connected to the slurry delivery port of the first-stage slurry pump, and the slurry outlet of the second-stage low-concentration cleaner is connected to the slurry inlet of the first-stage low-concentration cleaner;

[0008] A second-stage slurry pump, wherein the slurry inlet of the second-stage slurry pump is connected to the slurry discharge outlet of the second-stage low-concentration cleaner;

[0009] A three-stage low-concentration cleaner, wherein the slurry inlet of the three-stage low-concentration cleaner is connected to the slurry delivery port of the second-stage slurry pump, and the slurry outlet of the three-stage low-concentration cleaner is connected to the slurry inlet of the first-stage slurry pump;

[0010] A three-stage slurry pump, wherein the slurry inlet of the three-stage slurry pump is connected to the slurry discharge outlet of the three-stage low-concentration cleaner;

[0011] A four-stage low-concentration cleaner, wherein the slurry inlet of the four-stage low-concentration cleaner is connected to the slurry delivery port of the three-stage slurry pump, and the slurry outlet of the four-stage low-concentration cleaner is connected to the slurry inlet of the two-stage slurry pump;

[0012] A slurry tank connected to a slurry discharge port of the four-stage low-concentration cleaner;

[0013] A four-stage slurry pump, wherein the slurry inlet of the four-stage slurry pump is connected to the slurry tank;

[0014] A five-stage low-concentration cleaner, wherein the slurry inlet of the five-stage low-concentration cleaner is connected to the slurry delivery port of the four-stage slurry pump.

[0015] In some embodiments, it also includes:

[0016] A slag trough is connected to the slurry discharge port of the five-stage low-concentration slag remover.

[0017] In some embodiments, the number of the cleaner branches of the five-stage low-concentration cleaner is three.

[0018] In some embodiments, the diameter of the slurry inlet pipe of the five-stage low-concentration cleaner is DN125.

[0019] In some embodiments, the starting device of the five-stage low-concentration cleaner is a variable frequency starting device.

[0020] Another technical solution is provided, a pulping OCC line, including a low-concentration deslagging device, the low-concentration deslagging device comprising:

[0021] A low-consistency cleaner, which is used to remove the slag from the incoming good pulp and then send it to the fine screening equipment;

[0022] A first-stage slurry pump, wherein the slurry inlet of the first-stage slurry pump is connected to the slurry discharge outlet of the first-stage low-consistency cleaner;

[0023] A second-stage low-concentration cleaner, wherein the slurry inlet of the second-stage low-concentration cleaner is connected to the slurry delivery port of the first-stage slurry pump, and the slurry outlet of the second-stage low-concentration cleaner is connected to the slurry inlet of the first-stage low-concentration cleaner;

[0024] A second-stage slurry pump, wherein the slurry inlet of the second-stage slurry pump is connected to the slurry discharge outlet of the second-stage low-concentration cleaner;

[0025] A three-stage low-concentration cleaner, wherein the slurry inlet of the three-stage low-concentration cleaner is connected to the slurry delivery port of the second-stage slurry pump, and the slurry outlet of the three-stage low-concentration cleaner is connected to the slurry inlet of the first-stage slurry pump;

[0026] A three-stage slurry pump, wherein the slurry inlet of the three-stage slurry pump is connected to the slurry discharge outlet of the three-stage low-concentration cleaner;

[0027] A four-stage low-concentration cleaner, wherein the slurry inlet of the four-stage low-concentration cleaner is connected to the slurry delivery port of the three-stage slurry pump, and the slurry outlet of the four-stage low-concentration cleaner is connected to the slurry inlet of the two-stage slurry pump;

[0028] A slurry tank connected to a slurry discharge port of the four-stage low-concentration cleaner;

[0029] A four-stage slurry pump, wherein the slurry inlet of the four-stage slurry pump is connected to the slurry tank;

[0030] A five-stage low-concentration cleaner, wherein the slurry inlet of the five-stage low-concentration cleaner is connected to the slurry delivery port of the four-stage slurry pump.

[0031] In some embodiments, the low-concentration slag removal equipment further comprises:

[0032] A slag trough is connected to the slurry discharge port of the five-stage low-concentration slag remover.

[0033] In some embodiments, the number of the cleaner branches of the five-stage low-concentration cleaner is three.

[0034] In some embodiments, the diameter of the slurry inlet pipe of the five-stage low-concentration cleaner is DN125.

[0035] In some embodiments, the starting device of the five-stage low-concentration cleaner is a variable frequency starting device.

[0036] Different from the prior art, the above technical solution, when it is necessary to remove slag from the pulp by low-concentration slag removal equipment, first the pulp to be treated is sent to a first-stage low-concentration slag remover for treatment. The first-stage low-concentration slag remover has the strongest slag removal capacity. After the pulp is removed by the first-stage low-concentration slag remover, the good pulp obtained is subjected to fine screening by the next stage of fine screening equipment. The tailings produced by the first-stage low-concentration slag remover are sent to the second-stage low-concentration slag remover for removal through a first-stage slag pump. The obtained slag slurry is sent to the first-stage low-concentration slag remover for removal, and the tailings produced by the second-stage low-concentration slag remover are sent to the third-stage low-concentration slag remover for removal through the second-stage low-concentration slag remover. The slag produced by the slag remover is sent to the second stage low-concentration slag remover for slag removal through the first stage slag pump, and the tailings produced by the third stage low-concentration slag remover is sent to the fourth stage low-concentration slag remover for slag removal through the third stage slag pump, and then the slag obtained by slag removal in the fourth stage low-concentration slag remover is sent to the third stage low-concentration slag remover through the second stage slag pump, and the tailings produced by the fourth stage low-concentration slag remover is sent to the slag tank; the sent tailings are precipitated through the slag tank to obtain low-concentration tailings with high fiber content; the low-concentration tailings in the slag tank are sent to the fifth stage low-concentration slag remover for treatment through the fourth stage slag pump, and the slag treated by the fifth stage low-concentration slag remover is sent to the medium-concentration slag removal equipment for the next stage of slag removal. By adding a slag tank to store the tailings produced by the fourth stage low-concentration slag remover, and then sending it to the fifth stage low-concentration slag remover for slag removal, the fiber loss in the tailings can be reduced, the production capacity effect can be improved, and the cost per ton of paper can be saved.

[0037] The above-mentioned records related to the content of the utility model are only an overview of the technical solution of the present application. In order to enable ordinary technicians in the field to more clearly understand the technical solution of the present application, and then implement it according to the text of the specification and the contents recorded in the drawings, and to make the above-mentioned purpose and other purposes, features and advantages of the present application easier to understand, the following is an explanation in combination with the specific implementation method and drawings of the present application. BRIEF DESCRIPTION OF THE DRAWINGS

[0038] The drawings are only used to illustrate the principles, implementation methods, applications, characteristics and effects of the specific embodiments of the present application and other related contents, and shall not be considered as limitations of the present application.

[0039] In the drawings of the specification:

[0040] Figure 1 It is a structural schematic diagram of a four-stage low-consistency cleaner of an existing pulping OCC line described in a specific implementation manner;

[0041] Figure 2 A structural schematic diagram of a low-concentration slag removal device for a pulping OCC line described in a specific implementation method;

[0042] Figure 3 It is another structural schematic diagram of the low-concentration slag removal equipment of the pulping OCC line described in the specific implementation method.

[0043] The reference numerals in the above drawings are described as follows:

[0044] 110. One stage low concentration cleaner,

[0045] 120, first stage slurry pump;

[0046] 130. Second stage low concentration cleaner,

[0047] 140. Two-stage slurry pump;

[0048] 150. Three-stage low-concentration cleaner,

[0049] 160. Three-stage slurry pump;

[0050] 170. Four-stage low-concentration cleaner,

[0051] 180, slurry tank;

[0052] 190, four-stage slurry pump;

[0053] 1100, five-stage low-concentration cleaner;

[0054] 1110. Slag trough. DETAILED DESCRIPTION

[0055] In order to explain in detail the possible application scenarios, technical principles, specific schemes that can be implemented, and the purposes and effects that can be achieved, the following is a detailed description of the specific embodiments listed in conjunction with the accompanying drawings. The embodiments described herein are only used to more clearly illustrate the technical solutions of the present application, and are therefore only used as examples, and cannot be used to limit the scope of protection of the present application.

[0056] Reference to "embodiment" herein means that the specific features, structures or characteristics described in conjunction with the embodiment may be included in at least one embodiment of the present application. The term "embodiment" appearing in various places in the specification does not necessarily refer to the same embodiment, nor does it particularly limit its independence or association with other embodiments. In principle, in the present application, as long as there is no technical contradiction or conflict, the various technical features mentioned in the embodiments can be combined in any way to form a corresponding implementable technical solution.

[0057] Unless otherwise defined, the technical terms used in this document have the same meanings as those generally understood by those skilled in the art to which this application belongs; the use of relevant terms in this document is only for describing specific embodiments and is not intended to limit this application.

[0058] In the description of this application, the term "and / or" is an expression used to describe the logical relationship between objects, indicating that three relationships may exist, for example, A and / or B, which means: A exists, B exists, and A and B exist at the same time. In addition, the character " / " in this article generally indicates that the objects before and after are in an "or" logical relationship.

[0059] In the present application, terms such as “first” and “second” are merely used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship of quantity, priority or sequence between these entities or operations.

[0060] Without further limitations, in this application, the words "include", "comprises", "has" or other similar expressions used in the sentences are intended to cover non-exclusive inclusion. These expressions do not exclude the presence of additional elements in the process, method or product including the elements, so that the process, method or product including a series of elements may include not only those limited elements, but also other elements not explicitly listed, or also include elements inherent to such process, method or product.

[0061] Similar to the understanding in the Examination Guidelines, in this application, expressions such as "greater than", "less than", "exceed" and the like are understood to exclude the number itself; expressions such as "above", "below", "within" and the like are understood to include the number itself. In addition, in the description of the embodiments of this application, "multiple" means more than two (including two), and similar expressions related to "multiple" are also understood in this way, such as "multiple groups", "multiple times", etc., unless otherwise clearly and specifically limited.

[0062] In the description of the embodiments of the present application, space-related expressions used, such as "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "vertical", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc., indicate the orientation or position relationship based on the orientation or position relationship shown in the specific embodiments or drawings, and are only for the convenience of describing the specific embodiments of the present application or facilitating the reader's understanding, and do not indicate or imply that the referred device or component must have a specific position, a specific orientation, or be constructed or operated in a specific orientation, and therefore cannot be understood as a limitation on the embodiments of the present application.

[0063] Unless otherwise expressly specified or limited, in the description of the embodiments of the present application, the terms such as "install", "connect", "connect", "fix", "set", etc. used should be understood in a broad sense. For example, the "connection" can be a fixed connection, a detachable connection, or an integrated setting; it can be a mechanical connection, an electrical connection, or a communication connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium; it can be the internal connection of two elements or the interaction relationship between two elements. For technicians in the technical field to which the present application belongs, the specific meanings of the above terms in the embodiments of the present application can be understood according to the specific circumstances.

[0064] See also Figure 2-3 The present embodiment provides a low-concentration slag removal device for a pulping OCC line, comprising:

[0065] A low-consistency cleaner 110, which is used to remove the slag from the introduced good pulp and then send it to the fine screening equipment;

[0066] A first-stage slurry pump 120, wherein the slurry inlet of the first-stage slurry pump 120 is connected to the slurry discharge outlet of the first-stage low-consistency cleaner 110;

[0067] A second-stage low-concentration cleaner 130, wherein the slurry inlet of the second-stage low-concentration cleaner 130 is connected to the slurry delivery port of the first-stage slurry pump 120, and the slurry outlet of the second-stage low-concentration cleaner 130 is connected to the slurry inlet of the first-stage low-concentration cleaner 110;

[0068] A second-stage slurry pump 140, wherein the slurry inlet of the second-stage slurry pump 140 is connected to the slurry discharge outlet of the second-stage low-concentration cleaner 130;

[0069] A three-stage low-concentration cleaner 150, wherein the slurry inlet of the three-stage low-concentration cleaner 150 is connected to the slurry delivery port of the second-stage slurry pump 140, and the slurry outlet of the three-stage low-concentration cleaner 150 is connected to the slurry inlet of the first-stage slurry pump 120;

[0070] A three-stage slurry pump 160, wherein the slurry inlet of the three-stage slurry pump 160 is connected to the slurry discharge outlet of the three-stage low-concentration cleaner 150;

[0071] A four-stage low-concentration cleaner 170, wherein the slurry inlet of the four-stage low-concentration cleaner 170 is connected to the slurry delivery port of the three-stage slurry pump 160, and the slurry outlet of the four-stage low-concentration cleaner 170 is connected to the slurry inlet of the two-stage slurry pump 140;

[0072] A slurry tank 180, wherein the slurry tank 180 is connected to a slurry discharge port of the four-stage low-concentration cleaner 170;

[0073] A four-stage slurry pump 190, wherein the slurry inlet of the four-stage slurry pump 190 is connected to the slurry tank 180;

[0074] A five-stage low-concentration cleaner 1100 , wherein the slurry inlet of the five-stage low-concentration cleaner 1100 is connected to the slurry delivery port of the four-stage slurry pump 190 .

[0075] When the pulp needs to be deslagging treated by the low-concentration deslagging equipment, the pulp to be treated is first sent to the first-stage low-concentration deslagging device 110 for treatment. The first-stage low-concentration deslagging device 110 has the strongest deslagging capacity. After the pulp is deslagging treated by the first-stage low-concentration deslagging device 110, the obtained good pulp is subjected to the next stage of fine screening treatment. The tailings produced by the first-stage low-concentration deslagging device 110 are sent to the second-stage low-concentration deslagging device 130 for deslagging treatment through the first-stage slag pump 120. The obtained slag slurry is sent to the first-stage low-concentration deslagging device 110 for deslagging treatment, and the tailings produced by the second-stage low-concentration deslagging device 130 are sent to the third-stage low-concentration deslagging device 150 for deslagging treatment through the second-stage low-concentration deslagging device 130. Then the slag slurry produced by the third-stage low-concentration deslagging device 150 is sent to the first-stage slag pump 120. The pump 120 sends the tailings to the second-stage low-concentration cleaner 130 for deslagging treatment, and the tailings produced by the third-stage low-concentration cleaner 150 is sent to the fourth-stage low-concentration cleaner 170 for deslagging through the third-stage slurry pump 160, and then the slurry obtained by deslagging in the fourth-stage low-concentration cleaner 170 is sent to the third-stage low-concentration cleaner 150 through the second-stage slurry pump 140, and the tailings produced by the fourth-stage low-concentration cleaner 170 is sent to the slurry tank 180; the sent tailings are precipitated through the slurry tank 180 to obtain a low-concentration tailings with a high fiber content; the low-concentration tailings in the slurry tank 180 are sent to the fifth-stage low-concentration cleaner 1100 for treatment through the fourth-stage slurry pump 190, and the slurry treated by the fifth-stage low-concentration cleaner 1100 is sent to the medium-concentration deslagging equipment for the next stage of deslagging. By adding a slurry tank 180 to store the tailings produced by the four-stage low-concentration cleaner 170 and then passing it through the five-stage low-concentration cleaner 1100 for slurry removal, the fiber loss in the tailings can be reduced, the production capacity effect can be improved, and the cost per ton of paper can be saved.

[0076] See also Figure 2 , in some embodiments, further comprising:

[0077] The slag trough 1110 is connected to the slurry discharge port of the five-stage low-concentration slag remover 1100.

[0078] The tailings slurry produced by the five-stage low-concentration slag remover 1100 is stored in the slag tank 1110 to facilitate subsequent processing of the tailings slurry.

[0079] In some embodiments, the number of the deslagging branches of the five-stage low-concentration deslagging device 1100 is three. The five-stage low-concentration deslagging device 1100 uses three deslagging branches with a pipe diameter of DN50 to perform deslagging treatment on the low-concentration tailings, which can ensure the deslagging effect of the five-stage low-concentration deslagging device 1100 and reduce the equipment cost of the five-stage low-concentration deslagging device 1100.

[0080] In some embodiments, the diameter of the slurry inlet pipe of the five-stage low-concentration cleaner 1100 is DN125. By setting the diameter of the slurry inlet pipe of the five-stage low-concentration cleaner 1100 to DN125, the flow rate of the five-stage low-concentration cleaner 1100 can be increased so that the flow rate can reach 1300 ml / h.

[0081] In some embodiments, the starting device of the five-stage low-concentration cleaner 1100 is a variable frequency starting device. By using the variable frequency starting method for the five-stage low-concentration cleaner 1100, the slurry inlet pressure can be increased by overclocking, so that the slurry inlet pressure reaches 210kp and the flow rate reaches 1600L / min, thereby improving the quality of good slurry and also increasing the recovery output.

[0082] After adopting the improved pulping OCC line, the average monthly recycling volume is about 660 tons, and the average fiber recycling per ton of paper is 14.6 kg. Because the PM8 low-concentration tailings are eventually discharged to the PM7 paper machine, the main economic benefits of this solution are reflected in the price difference of raw materials between PM8 and PM7. According to the previous raw material prices, the price of PM8 raw materials is about 200 yuan / ton higher than that of PM7. Based on the annual output of PM8 of 600,000 tons and the recycling of 14.6 kg per ton of paper, the annual economic benefits are 60*0.0146*200=1.752 million yuan. The cost per ton of paper is saved while improving the production capacity effect.

[0083] Another technical solution is provided, a pulping OCC line, including a low-consistency deslagging device, see Figure 2-3 , the low-concentration slag removal equipment comprises:

[0084] A low-consistency cleaner 110, which is used to remove the slag from the introduced good pulp and then send it to the fine screening equipment;

[0085] A first-stage slurry pump 120, wherein the slurry inlet of the first-stage slurry pump 120 is connected to the slurry discharge outlet of the first-stage low-consistency cleaner 110;

[0086] A second-stage low-concentration cleaner 130, wherein the slurry inlet of the second-stage low-concentration cleaner 130 is connected to the slurry delivery port of the first-stage slurry pump 120, and the slurry outlet of the second-stage low-concentration cleaner 130 is connected to the slurry inlet of the first-stage low-concentration cleaner 110;

[0087] A second-stage slurry pump 140, wherein the slurry inlet of the second-stage slurry pump 140 is connected to the slurry discharge outlet of the second-stage low-concentration cleaner 130;

[0088] A three-stage low-concentration cleaner 150, wherein the slurry inlet of the three-stage low-concentration cleaner 150 is connected to the slurry delivery port of the second-stage slurry pump 140, and the slurry outlet of the three-stage low-concentration cleaner 150 is connected to the slurry inlet of the first-stage slurry pump 120;

[0089] A three-stage slurry pump 160, wherein the slurry inlet of the three-stage slurry pump 160 is connected to the slurry discharge outlet of the three-stage low-concentration cleaner 150;

[0090] A four-stage low-concentration cleaner 170, wherein the slurry inlet of the four-stage low-concentration cleaner 170 is connected to the slurry delivery port of the three-stage slurry pump 160, and the slurry outlet of the four-stage low-concentration cleaner 170 is connected to the slurry inlet of the two-stage slurry pump 140;

[0091] A slurry tank 180, wherein the slurry tank 180 is connected to a slurry discharge port of the four-stage low-concentration cleaner 170;

[0092] A four-stage slurry pump 190, wherein the slurry inlet of the four-stage slurry pump 190 is connected to the slurry tank 180;

[0093] A five-stage low-concentration cleaner 1100 , wherein the slurry inlet of the five-stage low-concentration cleaner 1100 is connected to the slurry delivery port of the four-stage slurry pump 190 .

[0094] When the pulp needs to be deslagging treated by the low-concentration deslagging equipment, the pulp to be treated is first sent to the first-stage low-concentration deslagging device 110 for treatment. The first-stage low-concentration deslagging device 110 has the strongest deslagging capacity. After the pulp is deslagging treated by the first-stage low-concentration deslagging device 110, the obtained good pulp is subjected to the next stage of fine screening treatment. The tailings produced by the first-stage low-concentration deslagging device 110 are sent to the second-stage low-concentration deslagging device 130 for deslagging treatment through the first-stage slag pump 120. The obtained slag slurry is sent to the first-stage low-concentration deslagging device 110 for deslagging treatment, and the tailings produced by the second-stage low-concentration deslagging device 130 are sent to the third-stage low-concentration deslagging device 150 for deslagging treatment through the second-stage low-concentration deslagging device 130. Then the slag slurry produced by the third-stage low-concentration deslagging device 150 is sent to the first-stage slag pump 120. The pump 120 sends the tailings to the second-stage low-concentration cleaner 130 for deslagging treatment, and the tailings produced by the third-stage low-concentration cleaner 150 is sent to the fourth-stage low-concentration cleaner 170 for deslagging through the third-stage slurry pump 160, and then the slurry obtained by deslagging in the fourth-stage low-concentration cleaner 170 is sent to the third-stage low-concentration cleaner 150 through the second-stage slurry pump 140, and the tailings produced by the fourth-stage low-concentration cleaner 170 is sent to the slurry tank 180; the sent tailings are precipitated through the slurry tank 180 to obtain a low-concentration tailings with a high fiber content; the low-concentration tailings in the slurry tank 180 are sent to the fifth-stage low-concentration cleaner 1100 for treatment through the fourth-stage slurry pump 190, and the slurry treated by the fifth-stage low-concentration cleaner 1100 is sent to the medium-concentration deslagging equipment for the next stage of deslagging. By adding a slurry tank 180 to store the tailings produced by the four-stage low-concentration cleaner 170 and then passing it through the five-stage low-concentration cleaner 1100 for slurry removal, the fiber loss in the tailings can be reduced, the production capacity effect can be improved, and the cost per ton of paper can be saved.

[0095] See also Figure 2In some embodiments, the low-concentration deslagging equipment further comprises:

[0096] The slag trough 1110 is connected to the slurry discharge port of the five-stage low-concentration slag remover 1100.

[0097] The tailings slurry produced by the five-stage low-concentration slag remover 1100 is stored in the slag tank 1110 to facilitate subsequent processing of the tailings slurry.

[0098] In some embodiments, the number of the deslagging branches of the five-stage low-concentration deslagging device 1100 is three. The five-stage low-concentration deslagging device 1100 uses three deslagging branches with a pipe diameter of DN50 to perform deslagging treatment on the low-concentration tailings, which can ensure the deslagging effect of the five-stage low-concentration deslagging device 1100 and reduce the equipment cost of the five-stage low-concentration deslagging device 1100.

[0099] In some embodiments, the diameter of the slurry inlet pipe of the five-stage low-concentration cleaner 1100 is DN125. By setting the diameter of the slurry inlet pipe of the five-stage low-concentration cleaner 1100 to DN125, the flow rate of the five-stage low-concentration cleaner 1100 can be increased so that the flow rate can reach 1300 ml / h.

[0100] In some embodiments, the starting device of the five-stage low-concentration cleaner 1100 is a variable frequency starting device. By using the variable frequency starting method for the five-stage low-concentration cleaner 1100, the slurry inlet pressure can be increased by overclocking, so that the slurry inlet pressure reaches 210kp and the flow rate reaches 1600L / min, thereby improving the quality of good slurry and also increasing the recovery output.

[0101] Finally, it should be noted that although the above embodiments have been described in the specification and drawings of this application, this does not limit the scope of patent protection of this application. All technical solutions generated by replacing or modifying equivalent structures or equivalent processes based on the essential concept of this application using the contents recorded in the specification and drawings of this application, as well as directly or indirectly implementing the technical solutions of the above embodiments in other related technical fields, are included in the scope of patent protection of this application.

Claims

1. A low-consistency deslagging device for a pulping OCC line, characterized in that: include: A low-consistency cleaner, which is used to remove the slag from the incoming good pulp and then send it to the fine screening equipment; A first-stage slurry pump, wherein the slurry inlet of the first-stage slurry pump is connected to the slurry discharge outlet of the first-stage low-concentration cleaner; A second-stage low-concentration cleaner, wherein the slurry inlet of the second-stage low-concentration cleaner is connected to the slurry delivery port of the first-stage slurry pump, and the slurry outlet of the second-stage low-concentration cleaner is connected to the slurry inlet of the first-stage low-concentration cleaner; A second-stage slurry pump, wherein the slurry inlet of the second-stage slurry pump is connected to the slurry discharge outlet of the second-stage low-concentration cleaner; A three-stage low-concentration cleaner, wherein the slurry inlet of the three-stage low-concentration cleaner is connected to the slurry delivery port of the second-stage slurry pump, and the slurry outlet of the three-stage low-concentration cleaner is connected to the slurry inlet of the first-stage slurry pump; A three-stage slurry pump, wherein the slurry inlet of the three-stage slurry pump is connected to the slurry discharge outlet of the three-stage low-concentration cleaner; A four-stage low-concentration cleaner, wherein the slurry inlet of the four-stage low-concentration cleaner is connected to the slurry delivery port of the three-stage slurry pump, and the slurry outlet of the four-stage low-concentration cleaner is connected to the slurry inlet of the two-stage slurry pump; A slurry tank connected to a slurry discharge port of the four-stage low-concentration cleaner; A four-stage slurry pump, wherein the slurry inlet of the four-stage slurry pump is connected to the slurry tank; A five-stage low-concentration cleaner, wherein the slurry inlet of the five-stage low-concentration cleaner is connected to the slurry delivery port of the four-stage slurry pump.

2. The low-concentration deslagging equipment for the pulping OCC line according to claim 1, characterized in that: Also includes: A slag trough is connected to the slurry discharge port of the five-stage low-concentration slag remover.

3. The low-concentration deslagging equipment for the pulping OCC line according to claim 1, characterized in that: The number of the slag remover branches of the five-stage low-concentration slag remover is three.

4. The low-concentration deslagging equipment for the pulping OCC line according to claim 3, characterized in that: The diameter of the pulp inlet pipe of the five-stage low-concentration cleaner is DN125.

5. The low-concentration deslagging equipment for the pulping OCC line according to claim 3, characterized in that: The starting device of the five-stage low-concentration slag remover is a variable frequency starting device.

6. A pulping OCC line, comprising a low-consistency deslagging device, characterized in that: The low-concentration slag removal equipment comprises: A low-consistency cleaner, which is used to remove the slag from the incoming good pulp and then send it to the fine screening equipment; A first-stage slurry pump, wherein the slurry inlet of the first-stage slurry pump is connected to the slurry discharge outlet of the first-stage low-concentration cleaner; A second-stage low-concentration cleaner, wherein the slurry inlet of the second-stage low-concentration cleaner is connected to the slurry delivery port of the first-stage slurry pump, and the slurry outlet of the second-stage low-concentration cleaner is connected to the slurry inlet of the first-stage low-concentration cleaner; A second-stage slurry pump, wherein the slurry inlet of the second-stage slurry pump is connected to the slurry discharge outlet of the second-stage low-concentration cleaner; A three-stage low-concentration cleaner, wherein the slurry inlet of the three-stage low-concentration cleaner is connected to the slurry delivery port of the second-stage slurry pump, and the slurry outlet of the three-stage low-concentration cleaner is connected to the slurry inlet of the first-stage slurry pump; A three-stage slurry pump, wherein the slurry inlet of the three-stage slurry pump is connected to the slurry discharge outlet of the three-stage low-concentration cleaner; A four-stage low-concentration cleaner, wherein the slurry inlet of the four-stage low-concentration cleaner is connected to the slurry delivery port of the three-stage slurry pump, and the slurry outlet of the four-stage low-concentration cleaner is connected to the slurry inlet of the two-stage slurry pump; A slurry tank connected to a slurry discharge port of the four-stage low-concentration cleaner; A four-stage slurry pump, wherein the slurry inlet of the four-stage slurry pump is connected to the slurry tank; A five-stage low-concentration cleaner, wherein the slurry inlet of the five-stage low-concentration cleaner is connected to the slurry delivery port of the four-stage slurry pump.

7. The pulping OCC line according to claim 6, characterized in that: The low-concentration slag removal equipment also includes: A slag trough is connected to the slurry discharge port of the five-stage low-concentration slag remover.

8. The pulping OCC line according to claim 6, characterized in that: The number of the slag remover branches of the five-stage low-concentration slag remover is three.

9. The pulping OCC line according to claim 6, characterized in that: The diameter of the pulp inlet pipe of the five-stage low-concentration cleaner is DN125.

10. The pulping OCC line according to claim 6, characterized in that: The starting device of the five-stage low-concentration slag remover is a variable frequency starting device.

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