A pulping system for an ONP line and a bottom pulping line for coating gray-bottom white board paper

Abstract

The utility model relates to a pulping system of an ONP line and a bottom pulping line for coating gray-bottom white board paper, wherein the pulping system comprises: a white water tower, the white water tower is used to process papermaking white water; a first water pump, the water pumping end of the first water pump is connected to the white water tower; a cooling tower, the water inlet end of the cooling tower is connected to the water delivery end of the first water pump; a second water pump, the water pumping end of the second water pump is connected to the water outlet end of the cooling tower; a pulper, the water inlet end of the pulper is connected to the water delivery end of the second water pump. The cooled white water can reduce the softening of adhesives in waste paper, and is not easy to be peeled off by the pulping equipment and enter the next process, thereby reducing the pollution of the pulp. At the same time, due to the cooling, high adhesives are not easy to deform in the system, but are easy to be removed by the screening system, thereby reducing the residue of high adhesives in the pulp, reducing the formation of adhesives on the finished paper, and reducing customer complaints.

Description

Technical Field

[0001] The present application relates to the technical field of papermaking, and in particular to a pulping system of an ONP line and a bottom pulp line for coating grey-bottom white board paper. Background Art

[0002] ONP line is a base pulp line for coated grey-backed white board with a daily output of 260 tons. Figure 1 In the existing pulping system shown in the figure, the white water of the system is directly supplied to the drum pulper from the white water tower. During normal use, the temperature of the white water circulating in the system will continue to rise. When a certain temperature is reached, the stickies in the waste paper will soften and be easily peeled off by the pulping equipment and enter the process to pollute the pulp. In addition, when the system temperature is high, the stickies soften in the system and are prone to deformation. They are not easily removed by the screening system and remain in the pulp, eventually forming stickies in the finished paper, resulting in more customer complaints. Utility Model Content

[0003] In view of the above problems, the present application provides a pulping system for an ONP line and a bottom pulp line for coating gray-bottom white board paper, which solves the problem that the white water in the white water tower of the existing ONP line is directly supplied to the pulper, and the temperature of the white water rises after circulating, causing the adhesives in the waste paper to soften.

[0004] To achieve the above object, the inventor provides a pulping system for an ONP line, comprising:

[0005] A white water tower, which is used to treat papermaking white water;

[0006] a first water pump, wherein a pumping end of the first water pump is connected to the white water tower;

[0007] A cooling tower, wherein the water inlet end of the cooling tower is connected to the water delivery end of the first water pump;

[0008] a second water pump, wherein a pumping end of the second water pump is connected to a water outlet end of the cooling tower;

[0009] A pulper, wherein the water inlet end of the pulper is connected to the water delivery end of the second water pump.

[0010] In some embodiments, it also includes:

[0011] A control valve, one end of which is connected to the white water tower, and the other end of which is connected to the pumping end of the second water pump.

[0012] In some embodiments, a temperature control module is further included, and the temperature control module includes:

[0013] A temperature sensor, wherein the temperature sensor is arranged in the white water tower;

[0014] A controller is connected to the temperature sensor, a control end of the control valve and a control end of the cooling tower.

[0015] In some embodiments, the temperature sensor is disposed at the drain outlet of the white water tower.

[0016] Another technical solution is provided, a bottom pulp line for coating grey-bottom white board paper, comprising a pulping system, wherein the pulping system comprises:

[0017] A white water tower, which is used to treat papermaking white water;

[0018] a first water pump, wherein a pumping end of the first water pump is connected to the white water tower;

[0019] A cooling tower, wherein the water inlet end of the cooling tower is connected to the water delivery end of the first water pump;

[0020] a second water pump, wherein a pumping end of the second water pump is connected to a water outlet end of the cooling tower;

[0021] A pulper, wherein the water inlet end of the pulper is connected to the water delivery end of the second water pump.

[0022] In some embodiments, the pulping system further comprises:

[0023] A control valve, one end of which is connected to the white water tower, and the other end of which is connected to the pumping end of the second water pump.

[0024] In some embodiments, the pulping system further includes a temperature control module, and the temperature control module includes:

[0025] A temperature sensor, wherein the temperature sensor is arranged in the white water tower;

[0026] A controller is connected to the temperature sensor, a control end of the control valve and a control end of the cooling tower.

[0027] In some embodiments, the temperature sensor is disposed at the drain outlet of the white water tower.

[0028] Different from the prior art, the above technical scheme is that after the white water tower treats the papermaking white water, before being transported to the pulper, the papermaking white water treated by the white water tower is sent to the cooling tower for cooling through the first water pump, and then the cooled papermaking white water is sent to the pulper through the second water pump; the cooled white water can reduce the softening of stickies in the waste paper, and is not easy to be peeled off by the pulping equipment and enter the next process, thereby reducing the pollution of the pulp. At the same time, due to cooling, high adhesives are not easy to deform in the system, and are easy to be removed by the screening system, thereby reducing the residue of high adhesives in the pulp, reducing the formation of stickies on the finished paper, and reducing customer complaints.

[0029] 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

[0030] 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.

[0031] In the drawings of the specification:

[0032] Figure 1 A schematic structural diagram of an existing pulping system described in the background technology;

[0033] Figure 2 A structural schematic diagram of the pulping system of the ONP line described in the specific implementation method;

[0034] Figure 3 Another structural schematic diagram of the pulping system of the ONP line described in the specific implementation manner;

[0035] Figure 4 A structural schematic diagram of the temperature control module described in the specific implementation method;

[0036] Figure 5 It is a structural schematic diagram of the bottom pulp line of the coated grey-bottom white board paper according to the specific implementation method.

[0037] The reference numerals in the above drawings are described as follows:

[0038] 110. White Water Tower;

[0039] 120. First water pump,

[0040] 130. Cooling tower,

[0041] 140. Second water pump,

[0042] 150. Pulper,

[0043] 160. Control valve,

[0044] 170. Temperature sensor,

[0045] 180. Controller. DETAILED DESCRIPTION

[0046] 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.

[0047] 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.

[0048] 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.

[0049] 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.

[0050] 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.

[0051] 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.

[0052] 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.

[0053] 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.

[0054] 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.

[0055] See also Figure 2 In order to solve the problem that the water circulation temperature in the white water tower is too high, which will soften the adhesives in the waste paper and make them difficult to remove, and easily enter the process to cause pulp pollution, and at the same time, it will cause more adhesives on the surface of the paper machine drying cylinder, causing paper machine paper breaks, and harming the papermaking process and paper quality, which is easy to cause customer complaints and damage the corporate brand image. This embodiment provides a pulping system for an ONP line, including:

[0056] White water tower 110, the white water tower 110 is used to treat papermaking white water;

[0057] A first water pump 120, wherein a pumping end of the first water pump 120 is connected to the white water tower 110;

[0058] A cooling tower 130, wherein a water inlet end of the cooling tower 130 is connected to a water delivery end of the first water pump 120;

[0059] a second water pump 140, wherein a pumping end of the second water pump 140 is connected to a water outlet end of the cooling tower 130;

[0060] The pulper 150 has a water inlet end connected to a water delivery end of the second water pump 140 .

[0061] After the white water tower 110 processes the papermaking white water, before being transported to the pulper 150, the papermaking white water processed by the white water tower 110 is sent to the cooling tower 130 for cooling through the first water pump 120, and then the cooled papermaking white water is sent to the pulper 150 through the second water pump 140; the cooled white water can reduce the softening of adhesives in the waste paper, and is not easily peeled off by the pulping equipment and enters the next process, thereby reducing the pollution of the pulp. At the same time, due to the cooling, high adhesives are not easy to deform in the system, but are easy to be removed by the screening system, thereby reducing the residue of high adhesives in the pulp, reducing the formation of adhesives on the finished paper, and reducing customer complaints.

[0062] See also Figure 3 , in some embodiments, further comprising:

[0063] A control valve 160 , one end of which is connected to the white water tower 110 , and the other end of which is connected to the pumping end of the second water pump 140 .

[0064] By setting a control valve 160 between the white water tower 110 and the second water pump 140 for connection, when the cooling tower 130 cannot work normally or the water temperature of the white water in the white water tower 110 is low, the cooling tower 130 can be controlled to stop working, and the white water tower 110 and the second water pump 140 are connected through the control valve 160, and white water is directly provided to the pulper 150 through the white water tower 110.

[0065] See also Figure 4 In some embodiments, a temperature control module is further included, wherein the temperature control module includes:

[0066] A temperature sensor 170, wherein the temperature sensor 170 is disposed in the white water tower 110;

[0067] The controller 180 is connected to the temperature sensor 170 , a control end of the control valve 160 , and a control end of the cooling tower 130 .

[0068] The temperature sensor 170 is arranged in the white water tower 110 to detect the water temperature of the papermaking white water in the white water tower 110. The water temperature of the papermaking white water in the white water tower 110 is used to judge whether it is necessary to cool the white water sent to the pulper 150 through the cooling tower 130. The threshold of the water temperature can be set according to the softening temperature of high adhesives in papermaking. When the water temperature of the papermaking white water in the white water tower 110 is low, the temperature of the papermaking white water in the white water tower 110 is lowered. When the temperature of the papermaking white water is not easy to soften high adhesives, the controller 180 opens the control valve 160 and closes the cooling tower 130, and then directly provides the papermaking white water in the white water tower 110 to the pulper 150; when the temperature of the papermaking white water in the white water tower 110 is high, the papermaking white water is easy to soften high adhesives, and the control valve 160 is closed to cool the papermaking white water in the white water tower 110 through the cooling tower 130 before sending it to the pulper 150. By selecting the cooling point, the best effect can be achieved with the least steam, and the efficiency can be improved. At the same time, by controlling the temperature, the adhesives in the waste paper are not softened and broken as much as possible, and their solid block form is retained, so that they can be removed in the subsequent screening process, reducing the adhesive content in the pulp. But the impact on production capacity should be minimized.

[0069] In some embodiments, the temperature sensor 170 is disposed at the drain outlet of the white water tower 110 .

[0070] By setting the temperature sensor 170 at the outlet of the white water tower 110 to detect the water temperature of the papermaking white water sent out by the white water tower 110, the water temperature of the papermaking white water can be detected more accurately, and then it can be determined whether the papermaking white water needs to be cooled. In other embodiments, the temperature sensor 170 can also be set at the water inlet of the cooling tower 130 or the water inlet of the pulper 150.

[0071] See also Figure 5 In another embodiment, a bottom pulp line for coating gray-bottom white board paper includes a pulping system, see Figure 2 , the pulping system comprises:

[0072] White water tower 110, the white water tower 110 is used to treat papermaking white water;

[0073] A first water pump 120, wherein a pumping end of the first water pump 120 is connected to the white water tower 110;

[0074] A cooling tower 130, wherein a water inlet end of the cooling tower 130 is connected to a water delivery end of the first water pump 120;

[0075] a second water pump 140, wherein a pumping end of the second water pump 140 is connected to a water outlet end of the cooling tower 130;

[0076] The pulper 150 has a water inlet end connected to a water delivery end of the second water pump 140 .

[0077] After the white water tower 110 processes the papermaking white water, before being transported to the pulper 150, the papermaking white water processed by the white water tower 110 is sent to the cooling tower 130 for cooling through the first water pump 120, and then the cooled papermaking white water is sent to the pulper 150 through the second water pump 140; the cooled white water can reduce the softening of adhesives in the waste paper, and is not easily peeled off by the pulping equipment and enters the next process, thereby reducing the pollution of the pulp. At the same time, due to the cooling, high adhesives are not easy to deform in the system, but are easy to be removed by the screening system, thereby reducing the residue of high adhesives in the pulp, reducing the formation of adhesives on the finished paper, and reducing customer complaints.

[0078] See also Figure 3 In some embodiments, the pulping system further comprises:

[0079] A control valve 160 , one end of which is connected to the white water tower 110 , and the other end of which is connected to the pumping end of the second water pump 140 .

[0080] By setting a control valve 160 between the white water tower 110 and the second water pump 140 for connection, when the cooling tower 130 cannot work normally or the water temperature of the white water in the white water tower 110 is low, the cooling tower 130 can be controlled to stop working, and the white water tower 110 and the second water pump 140 are connected through the control valve 160, and white water is directly provided to the pulper 150 through the white water tower 110.

[0081] See also Figure 4 In some embodiments, the pulping system further comprises a temperature control module, and the temperature control module comprises:

[0082] A temperature sensor 170, wherein the temperature sensor 170 is disposed in the white water tower 110;

[0083] The controller 180 is connected to the temperature sensor 170 , a control end of the control valve 160 , and a control end of the cooling tower 130 .

[0084] The temperature sensor 170 is arranged in the white water tower 110 to detect the water temperature of the papermaking white water in the white water tower 110. The water temperature of the papermaking white water in the white water tower 110 is used to judge whether it is necessary to cool the white water sent to the pulper 150 through the cooling tower 130. The threshold of the water temperature can be set according to the softening temperature of high adhesives in papermaking. When the water temperature of the papermaking white water in the white water tower 110 is low, the temperature of the papermaking white water in the white water tower 110 is lowered. When the temperature of the papermaking white water is not easy to soften high adhesives, the controller 180 opens the control valve 160 and closes the cooling tower 130, and then directly provides the papermaking white water in the white water tower 110 to the pulper 150; when the temperature of the papermaking white water in the white water tower 110 is high, the papermaking white water is easy to soften high adhesives, and the control valve 160 is closed, and the papermaking white water in the white water tower 110 is cooled by the cooling tower 130 and then sent to the pulper 150. By selecting the cooling point, the best effect can be achieved with the least steam, thereby improving the efficiency.

[0085] In some embodiments, the temperature sensor 170 is disposed at the drain outlet of the white water tower 110 .

[0086] By setting the temperature sensor 170 at the outlet of the white water tower 110 to detect the water temperature of the papermaking white water sent out by the white water tower 110, the water temperature of the papermaking white water can be detected more accurately, and then it can be determined whether the papermaking white water needs to be cooled. In other embodiments, the temperature sensor 170 can also be set at the water inlet of the cooling tower 130 or the water inlet of the pulper 150.

[0087] 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 pulping system for an ONP line, characterized in that: include: A white water tower, which is used to treat papermaking white water; a first water pump, wherein a pumping end of the first water pump is connected to the white water tower; A cooling tower, wherein the water inlet end of the cooling tower is connected to the water delivery end of the first water pump; a second water pump, wherein a pumping end of the second water pump is connected to a water outlet end of the cooling tower; A pulper, wherein the water inlet end of the pulper is connected to the water delivery end of the second water pump.

2. The pulping system of the ONP line according to claim 1, characterized in that: Also includes: A control valve, one end of which is connected to the white water tower, and the other end of which is connected to the pumping end of the second water pump.

3. The pulping system of the ONP line according to claim 2, characterized in that: It also includes a temperature control module, which includes: A temperature sensor, wherein the temperature sensor is arranged in the white water tower; A controller is connected to the temperature sensor, a control end of the control valve and a control end of the cooling tower.

4. The pulping system of the ONP line according to claim 3, characterized in that: The temperature sensor is arranged at the drain outlet of the white water tower.

5. A bottom pulping line for coating grey-bottom white board paper, comprising a pulping system, characterized in that: The pulping system comprises: A white water tower, which is used to treat papermaking white water; a first water pump, wherein a pumping end of the first water pump is connected to the white water tower; A cooling tower, wherein the water inlet end of the cooling tower is connected to the water delivery end of the first water pump; a second water pump, wherein a pumping end of the second water pump is connected to a water outlet end of the cooling tower; A pulper, wherein the water inlet end of the pulper is connected to the water delivery end of the second water pump.

6. The bottom stock line of the coated grey-bottom white board paper according to claim 5, characterized in that: The pulping system further comprises: A control valve, one end of which is connected to the white water tower, and the other end of which is connected to the pumping end of the second water pump.

7. The bottom stock line of the coated grey-bottom white board paper according to claim 6, characterized in that: The pulping system further includes a temperature control module, which includes: A temperature sensor, wherein the temperature sensor is arranged in the white water tower; A controller is connected to the temperature sensor, a control end of the control valve and a control end of the cooling tower.

8. The bottom stock line of the coated grey-bottom white board paper according to claim 7, characterized in that: The temperature sensor is arranged at the drain outlet of the white water tower.

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