Antifouling cleaning system of papermaking drying system
By spraying a cleaning agent into the paper drying system to form a protective film and rinsing the dry wire, the problems of dry wire blockage and poor air permeability caused by impurities are solved, achieving efficient cleaning and energy saving.
Patent Information
- Application Number
- CN202520315806.3
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-02-26
- Publication Date
- 2026-01-27
- Estimated Expiration
- 2035-02-26
AI Technical Summary
In existing paper drying systems, the recycling of waste paper leads to an increase in impurities, resulting in wire clogging, poor air permeability, and low efficiency, which affects paper machine operation and paper quality.
A spraying device is used to spray a cleaning agent onto the surface of the drying cylinder to form a protective film. A cleaning device is used to rinse the drying net. A vacuum recovery component sucks in dirt to prevent impurities from adhering, thereby improving drying efficiency and air permeability.
It effectively prevents the adhesion of adhesives and paper fibers, improves the air permeability and service life of the dry wire, reduces energy consumption, and improves the operating efficiency of the paper machine and the quality of the finished paper.
Smart Images
Figure CN223837809U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of cleaning technology, specifically to a dirt-proof cleaning system for a paper drying system. Background Technology
[0002] In the papermaking process, the drying system mainly relies on high-temperature steam to heat the drying cylinders and remove moisture from the wet paper web, which also determines the paper's strength. Existing papermaking drying systems mainly include drying cylinders, a wire dryer, a steam supply system, a condensate drainage system, and a ventilation system. Steam is introduced into the drying cylinders, and the heat from the steam is transferred to the paper surface through the cylinder walls, causing the moisture in the paper to evaporate. Multiple drying cylinders are usually arranged in a specific pattern to form a drying cylinder group, gradually reducing the paper's moisture content. The wire dryer, with its excellent thermal conductivity, transfers heat from the drying cylinders to the paper, improving drying efficiency and ensuring uniform heating. It also provides support for the paper to ensure continuous production.
[0003] However, with the rapid development of the paper industry and the increasing number of waste paper recycling cycles, the amount of impurities in waste paper raw materials is increasing, leading to a rise in harmful substances entering the paper machine system. This also increases processing energy consumption and production costs. Some impurities deposit on the dryer wire and clog the mesh, affecting the cleanliness of the dryer wire. Furthermore, black spots on the paper surface, paper breaks, and product quality problems caused by adhesives, paper fibers, and other substances sticking to the cylinder and dryer wire, as well as poor dryer wire cleanliness leading to poor air permeability, low efficiency, and short service life, all seriously affect the normal operation of the paper machine and the quality of the finished paper.
[0004] Therefore, in order to solve the above problems, we propose a dirt-proof and cleaning system for paper drying systems. Utility Model Content
[0005] The purpose of this invention is to overcome the shortcomings of the existing technology and provide a dirt-proof and cleaning system for a paper drying system. A cleaning agent is sprayed onto the surface of the drying cylinder by a spraying device to form a protective film, which separates the drying cylinder from the wet paper sheets. At the same time, a cleaning device is used to wash the dry wire, and the dirt washed off is sucked in by a vacuum recovery component and then discharged.
[0006] To achieve the above objectives, the technical solution adopted by this utility model is as follows: a decontamination and cleaning system for a paper drying system, comprising a spraying device for spraying a cleaning agent onto the surface of the drying cylinder to form a protective film and a cleaning device for rinsing the drying wire, wherein the cleaning device is located behind the spraying device; the spraying device includes a nozzle capable of reciprocating along the axial direction of the drying cylinder, the nozzle being disposed on one side of the drying cylinder; the cleaning device includes a nozzle disposed above the drying wire, and a vacuum recovery component for collecting dirt detached from the drying wire is disposed below the nozzle.
[0007] Optionally, the spraying device further includes a moving mechanism for driving the nozzle to move axially, the moving mechanism being disposed on one side of the drying cylinder, and the output end of the moving mechanism being connected to the nozzle.
[0008] Optionally, the moving mechanism includes a guide rail parallel to the axis of the drying cylinder, the nozzle is slidably mounted on the guide rail, and a linear module capable of driving the nozzle to move along the guide rail is provided on one side of the guide rail.
[0009] Optionally, the nozzle is connected to a first container for storing cleaning agent.
[0010] Optionally, multiple nozzles are provided, the nozzles are inclined relative to the dry net, and the multiple nozzles are distributed in a straight line above the dry net.
[0011] Optionally, the cleaning device further includes a second container in communication with the nozzle, and a pump body is disposed between the second container and the nozzle.
[0012] Optionally, the vacuum recovery assembly includes a collection tank for receiving dirt, the collection tank being located below the nozzle, and one side of the collection tank being connected to a collection box via a pipe, and one side of the collection box being provided with a vacuum generator for generating a vacuum negative pressure inside its cavity.
[0013] Optionally, a scraper for scraping off impurities adhering to its surface is also provided on one side of the drying cylinder.
[0014] Compared with the prior art, the beneficial effects of this utility model are as follows:
[0015] (1) In this utility model, a cleaning agent is sprayed onto the surface of the drying cylinder by a spraying device to form a protective film between the drying cylinder and the wet paper sheet, so that the adhesive and paper wool impurities on the surface of the paper sheet can no longer adhere tightly to the drying cylinder; at the same time, the cleaning device is used to wash the dry wire, and the dirt washed off is sucked in by the vacuum recovery component and then discharged, which improves the drying evaporation efficiency and the air permeability of the dry wire; the system can prevent adhesives from sticking to the cylinder and the wire, improve the paper machine operating efficiency, and reduce energy consumption;
[0016] (2) In this utility model, the nozzle of the spraying device moves back and forth along the axis of the drying cylinder, so that the cleaning agent is sprayed on the surface of the drying cylinder in a scanning manner, which effectively avoids the situation that the two ends or the middle part of the drying cylinder are not sprayed due to the fixed position of the nozzle, and reduces the waste of cleaning agent caused by excessive concentrated spraying in a certain area.
[0017] (3) In this utility model, vacuum negative pressure is used to collect dirt that has detached from the dry net, which is not only highly efficient, but also effectively prevents dirt from splashing everywhere. Attached Figure Description
[0018] Figure 1 This is a schematic diagram of the anti-fouling and cleaning system of the paper drying system in this embodiment of the present invention;
[0019] The components include: 1. Drying cylinder; 2. Drying wire; 3. Paper sheet; 4. Spraying device; 401. Spray head; 402. Guide rail; 403. Linear module; 404. Slider; 501. Nozzle; 502. Vacuum recovery assembly; 6. Scraper. Detailed Implementation
[0020] The present invention will now be described in further detail with reference to the accompanying drawings and embodiments. These drawings are simplified schematic diagrams, which are only used to illustrate the basic structure of the present invention in a schematic manner, and therefore only show the components related to the present invention.
[0021] In actual production, the drying cylinder 1 is installed on the frame, and multiple drying cylinders 1 are combined together in a certain arrangement to form a drying cylinder group 1. The drying wire 2 is fitted on the outside of the drying cylinder group 1 and can rotate together with the drying cylinder 1. After the wet paper sheet 3 comes out of the press section of the papermaking system, it enters the drying system, that is, it falls on the drying wire 2 and is conveyed backward with the drying wire 2. The drying cylinder group 1 evaporates the moisture in the paper to achieve drying.
[0022] Example 1, as Figure 1 As shown, a paper drying system includes a cleaning system for preventing contamination, comprising a spraying device 4 and a cleaning device. The former is used to spray a cleaning agent onto the surface of the drying cylinder 1 to form a protective film to isolate the surface of the drying cylinder 1 from the paper. The latter is used to rinse the dry wire 2, improving the air permeability of the dry wire 2 while increasing the operating efficiency of the paper machine. The cleaning device is located behind the spraying device 4, that is, the spraying device 4 and the cleaning device are distributed sequentially along the direction of paper movement.
[0023] The spraying device 4 sprays a cleaning agent onto the surface of the drying cylinder 1 to form a protective film, separating the drying cylinder 1 from the wet paper sheet 3. This prevents impurities generated on the drying wire 2 and the paper during the dehydration process from sticking to the cylinder and reducing paper quality. At the same time, the cleaning device washes the drying wire 2, effectively solving a series of paper defects caused by the deposition and clogging of impurities during the use of the drying wire 2. This not only improves the air permeability of the drying wire 2, but also effectively extends the service life of the drying wire 2.
[0024] like Figure 1 As shown, the spraying device 4 includes a nozzle 401, a moving mechanism, and a first container. The nozzle 401 is connected to the first container. The cleaning agent stored inside the first container can be pumped to the nozzle 401 by pressurizing the first container, and then sprayed onto the surface of the drying cylinder 1 through the nozzle 401. The moving mechanism drives the nozzle 401 to move back and forth along the axial direction of the drying cylinder 1, so that the cleaning agent is sprayed onto the surface of the drying cylinder 1 in a scanning manner.
[0025] Both the moving mechanism and the nozzle 401 are located on one side of the drying cylinder 1, and the output end of the moving mechanism is connected to the nozzle 401.
[0026] Specifically, the moving mechanism includes a guide rail 402 and a linear module 403, both of which are mounted on the frame on one side of the first drying cylinder 1 at the outlet of the pressing section and are parallel to the axis of the drying cylinder 1. The nozzle 401 is slidably mounted on the guide rail 402, and the linear module 403 is located on one side of the guide rail 402 to drive the nozzle 401 to move along the guide rail 402.
[0027] The linear module 403 is existing technology, including but not limited to screw-driven linear modules, synchronous belt-driven linear modules, and rack and pinion-driven linear modules; the nozzle 401 is mounted on the guide rail 402 via a slider 404, and the output end of the linear module 403 is connected to the slider 404, thereby achieving the purpose of driving the nozzle 401 to move.
[0028] The nozzle 401 of the spraying device 4 moves back and forth along the axial direction of the drying cylinder 1, so that the cleaning agent is sprayed onto the surface of the drying cylinder 1 in a scanning manner. This effectively avoids the situation where the two ends or the middle part of the drying cylinder 1 are not sprayed due to the fixed position of the nozzle 401, and reduces the waste of cleaning agent caused by excessive concentrated spraying in a certain area.
[0029] Furthermore, a scraper 6 is provided on one side of the drying cylinder 1 to scrape off impurities attached to its surface. The scraper 6 is connected to the machine frame through a blade holder. The spray head 401 continuously and evenly scans and sprays the drying cylinder 1, so that a protective film is formed on its surface, separating the drying cylinder 1 from the wet paper sheet 3. The adhesive and paper fibers on the surface of the paper sheet 3 can no longer adhere tightly to the drying cylinder 1. Even if a small amount adheres, it will be removed by the scraper 6 as the drying cylinder 1 rotates.
[0030] In the papermaking process, in order to keep the surface of the drying cylinder 1 clean and prevent paper from getting tangled in the drying cylinder 1 when the paper sheet 3 breaks, a scraper 6 is usually installed on the drying cylinder 1. The scraper 6 contacts the surface of the drying cylinder 1 and scrapes away impurities, paper fibers, adhesives, etc., attached to the surface of the drying cylinder 1 to ensure the normal operation of the drying cylinder 1 and the quality of the paper; the scraper 6 here will not damage the protective film formed by the cleaning agent.
[0031] In Example 2, based on Example 1, this utility model also proposes a specific structure for the cleaning device.
[0032] like Figure 1As shown, the cleaning device includes a nozzle 501, a pump body, a second container, and a vacuum recovery assembly 502. The nozzle 501 is connected to the second container, and a pump body is provided between the second container and the nozzle 501. The pump body is a high-pressure water pump, which pumps the cleaning water in the second container to the nozzle 501 to form a high-pressure water flow to rinse the dry net 2. The nozzle 501 and the vacuum recovery assembly 502 are mounted on the frame, with the nozzle 501 located above the dry net 2 and the vacuum recovery assembly 502 located below the nozzle 501, for collecting dirt that has detached from the dry net 2.
[0033] Multiple nozzles 501 are arranged in a straight line above the dry net 2 to ensure that the rinsing range covers the area of the dry net 2 to be cleaned. High-pressure water from a high-pressure water pump is sprayed onto the dry net 2 through the nozzles 501 at a certain angle, rinsing away the impurities deposited and clogged on the dry net 2. The detached dirt is sucked in and discharged by the vacuum recovery component 502 below the nozzles 501. The use of vacuum negative pressure to collect the dirt detached from the dry net 2 is not only highly efficient but also effectively prevents dirt from splashing everywhere.
[0034] The vacuum recovery assembly 502 includes a collection tank for receiving dirt. The collection tank is located below the nozzle 501, and one side of the collection tank is connected to a collection box via a pipe. A vacuum generator for generating a vacuum negative pressure inside its cavity is provided on one side of the collection box.
[0035] A vacuum negative pressure is created in the cavity of the collection tank using an existing vacuum generator. This negative pressure extends to the collection tank through a pipe. When external dirt falls into the collection tank or its periphery, it is drawn into the collection tank through the pipe by the vacuum negative pressure. Once the liquid level in the collection tank rises to a certain height, it is discharged and processed in a unified manner.
[0036] In summary, this utility model proposes a cleaning and anti-fouling system for a paper drying system. A cleaning agent is sprayed onto the surface of the drying cylinder 1 using a spraying device 4 to form a protective film, separating the drying cylinder 1 from the wet paper sheet 3. Adhesives and paper fibers on the surface of the paper sheet 3 can no longer adhere tightly to the drying cylinder 1. Even if a small amount adheres, it will be removed by the scraper 6 as the drying cylinder 1 rotates. Simultaneously, a cleaning device washes the dry wire 2. The washed-off dirt is sucked in by the vacuum recovery component 502 and then discharged. This effectively solves the problems of low cleanliness of the dry wire 2, decreased air permeability of the dry wire 2, and low drying efficiency, improving the paper machine's operating efficiency and achieving the goal of "energy saving, consumption reduction, quality improvement, and efficiency enhancement" in clean papermaking.
[0037] Using this system in the papermaking process can reduce the air permeability of the dry wire 2 to within 5%, increasing its service life from 180 days to 200 days, an increase of 20 days; paper machine operating efficiency increases from 95.6% to 96%, an increase of 0.4%, resulting in an annual increase in output of approximately 1600 tons; the qualified rate of linerboard exceeds 99%, and the quality meets the requirements of GB / T 13024-2016 "Linerboard" (Superior Grade). Steam energy consumption in the drying section is reduced from 1.62 t / t to 1.57 t / t, saving 0.05 tons of steam per ton of paper. The energy consumption of linerboard is reduced to 180 kgce / Adt, far below the advanced value of 220 kgce / Adt required by GB3185-2015 "Energy Consumption Limits for Unit Products in Pulp and Paper Making".
[0038] In the description of this utility model, it should be understood that the terms "center," "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicating orientation or positional relationships, are based on the orientation or positional relationships shown in the accompanying drawings and are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model. Furthermore, the terms "first," "second," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, features defined with "first," "second," etc., may explicitly or implicitly include one or more of that feature. In the description of this utility model, unless otherwise stated, "a plurality of" means two or more.
[0039] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.
[0040] Based on the preferred embodiments of this utility model described above, those skilled in the art can make various changes and modifications without departing from the technical concept of this utility model. The technical scope of this utility model is not limited to the contents of the specification, but must be determined according to the scope of the claims.
Claims
1. A dirt-proof and cleaning system for a paper drying system, characterized in that: The device includes a spraying device (4) for spraying a cleaning agent onto the surface of the drying cylinder (1) to form a protective film and a cleaning device for rinsing the dry net (2), the cleaning device being located behind the spraying device (4); the spraying device (4) includes a nozzle (401) capable of reciprocating along the axial direction of the drying cylinder (1), the nozzle (401) being disposed on one side of the drying cylinder (1); the cleaning device includes a nozzle (501) disposed above the dry net (2), and a vacuum recovery assembly (502) for collecting dirt detached from the dry net (2) is disposed below the nozzle (501).
2. The anti-fouling and cleaning system for the paper drying system according to claim 1, characterized in that: The spraying device (4) further includes a moving mechanism for driving the nozzle (401) to move axially. The moving mechanism is located on one side of the drying cylinder (1), and the output end of the moving mechanism is connected to the nozzle (401).
3. The anti-fouling and cleaning system for the paper drying system according to claim 2, characterized in that: The moving mechanism includes a guide rail (402) parallel to the axis of the drying cylinder (1), the nozzle (401) is slidably mounted on the guide rail (402), and a linear module (403) is provided on one side of the guide rail (402) to drive the nozzle (401) to move along the guide rail (402).
4. The anti-fouling and cleaning system for the paper drying system according to claim 3, characterized in that: The nozzle (401) is connected to a first container for storing cleaning agent.
5. The anti-fouling and cleaning system for the paper drying system according to claim 1, characterized in that: The nozzle (501) is provided in multiple ways. The nozzle (501) is inclined relative to the dry net (2), and the multiple nozzles (501) are distributed in a straight line above the dry net (2).
6. The anti-fouling and cleaning system for the paper drying system according to claim 1, characterized in that: The cleaning device also includes a second container in communication with the nozzle (501), and a pump body is provided between the second container and the nozzle (501).
7. The anti-fouling and cleaning system for the paper drying system according to claim 1, characterized in that: The vacuum recovery assembly (502) includes a collection tank for receiving dirt, the collection tank being located below the nozzle (501), and one side of the collection tank being connected to a collection box via a pipe, the collection box having a vacuum generator for generating a vacuum negative pressure inside its cavity on one side.
8. The anti-fouling and cleaning system for a paper drying system according to any one of claims 1-7, characterized in that: A scraper (6) for scraping off impurities attached to its surface is also provided on one side of the drying cylinder (1).