Blanket cleaning and cleaning device for press part of paper machine

Abstract

The utility model relates to a blanket cleaning and cleaning device for a press part of a paper machine, which comprises a hot water tank, a water inlet of which is connected with a hot water pool of the paper machine through a pipeline; the cleaning agent storage tank is used for storing a cleaning agent; a micro metering pump is arranged in the pump station, and a liquid inlet of the micro metering pump is connected with a liquid outlet of the cleaning agent storage tank through a pipeline; the static mixer is communicated with a water outlet of the hot water tank through a water pump, and the static mixer is connected with a liquid outlet of the micro metering pump through a pipeline; and the spraying device is communicated with the mixed liquid outlet of the static mixer through a pipeline and is used for cleaning the upper part and the lower part of the blanket. According to the utility model, the cleaning and clean-keeping effects of the blanket at the pressing part of the paper machine are improved, adhesive substances attached to the blanket are greatly reduced, the air permeability of the blanket is improved, the folding degradation and crushing and paper breaking of felt caused by dirt and hole blockage of the blanket are avoided, the normal production and operation are ensured, and the yield of raw paper is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of pulping and papermaking, in particular to a felt cleaning device for a pressing part of a paper machine. Background Art

[0002] In the production process of corrugated paper, due to the large-scale recycling of secondary fibers, the raw material structure is getting worse and worse, and there are more and more adhesives in the system. During the operation of the felt, fine fibers, fillers, and adhesives are easily attached. These harmful substances are adsorbed on the felt, blocking the holes of the felt, thereby increasing the water filtration resistance and causing the wet paper in the pressing section to have a large amount of moisture. In mild cases, paper defects such as folds and horseshoe marks will occur, and in severe cases, crushing will cause paper breaks on the paper machine, affecting production operations, requiring frequent shutdowns to clean the felt, resulting in low production efficiency. Utility Model Content

[0003] To this end, the technical problem to be solved by the utility model is to overcome the shortcomings of the prior art and provide a felt cleaning and maintenance device for the pressing section of a paper machine, which improves the cleaning and maintenance effect of the felt in the pressing section of a paper machine, greatly reduces the adhesives attached to the felt, improves the air permeability of the felt, avoids the degradation of the felt folds and the crushing and breaking of paper caused by dirt and blockage of the holes in the felt, ensures normal production operation, and improves the yield rate of base paper.

[0004] In order to solve the above technical problems, the utility model provides a felt cleaning device for a press section of a paper machine, comprising:

[0005] A hot water tank, the water inlet of which is connected to the hot water tank of the paper machine through a pipeline;

[0006] A cleaning agent storage tank, used for storing cleaning agents;

[0007] A pump station, wherein a micro-metering pump is provided in the pump station, and a liquid inlet of the micro-metering pump is connected to a liquid outlet of the cleaning agent storage tank through a pipeline;

[0008] A static mixer, used to mix the hot water in the hot water tank with the medicine in the cleaning agent storage tank; the static mixer is connected to the water outlet of the hot water tank through a water pump, and the static mixer is connected to the liquid outlet of the micro-metering pump through a pipeline;

[0009] The spray device is connected with the mixing liquid outlet of the static mixer through a pipeline and is used for cleaning the upper and lower parts of the felt.

[0010] In one embodiment of the utility model, a vacuum water suction box is further included. The vacuum water suction box is arranged on the upper side or the lower side of the blanket and removes the residual liquid of medicine above and below the blanket through vacuum absorption.

[0011] In one embodiment of the utility model, the spray device includes a spray pipe and a nozzle, one end of the spray pipe is connected to the liquid outlet of the static mixer, and the other end of the spray pipe is connected to the nozzle.

[0012] In one embodiment of the present invention, the nozzle is an atomizing nozzle.

[0013] In one embodiment of the utility model, a one-way valve is provided on the pipeline between the static mixer and the cleaning agent storage tank.

[0014] In one embodiment of the utility model, the micro metering pumps include four units, which are respectively connected to the spray pipe through a hose.

[0015] In one embodiment of the utility model, the static mixer includes an upper sealing flange, a mixer cavity and a lower sealing flange connected in sequence from top to bottom, a mixing component is arranged inside the mixer cavity, a mixing liquid outlet is arranged at the bottom of the lower sealing flange, a mixing liquid inlet 1 and a mixing liquid inlet 2 are arranged on the side wall of the mixer cavity, and the inner cavities of the mixing liquid inlet 1 and the mixing liquid inlet 2 are connected to the inner cavity of the mixer cavity.

[0016] In one embodiment of the present invention, a cavity structure is formed between the inner wall of the mixer cavity and the outer wall of the mixing member.

[0017] In one embodiment of the utility model, the mixing component includes a groove, a columnar body and a tangential flow channel, the columnar body is a columnar cylindrical structure with a certain wall thickness, the upper and lower ends of the columnar body are respectively provided with grooves, and the side wall of the columnar body is provided with multiple groups of tangential flow channels. The multiple groups of tangential flow channels can provide a stable and uniform cyclone field to ensure uniform mixing of the reagents, and the cyclone separation principle is used to fully mix the reagent flocs with the pollutants, thereby improving the efficiency of the adhesion of the reagent flocs with the pollutants, saving the amount of reagents used, and reducing the operating load of the downstream separator.

[0018] In one embodiment of the present invention, the tangential flow channel tangentially penetrates the side wall of the columnar body, and the tangential flow channel is evenly arranged in the longitudinal and circumferential directions of the columnar body.

[0019] The above technical solution of the utility model has the following beneficial effects compared with the prior art:

[0020] The utility model discloses a felt cleaning and maintenance device for a pressing section of a paper machine, which adds felt cleaning agent to the mixer inlet of a spray pipe through a micro-metering pump, fully mixes water and the agent to avoid partial damage to the felt due to uneven mixing, and after mixing, evenly sprays the felt through a spray device to clean adhesives in the felt, ensuring that the air permeability and water permeability of the felt are normal, thereby avoiding paper defects such as felt folds, stabilizing the production operation of the paper machine, and improving production efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] In order to make the content of the utility model easier to understand, the utility model is further described in detail according to the specific embodiments of the utility model in combination with the accompanying drawings, wherein

[0022] Figure 1 It is a structural schematic diagram of a felt cleaning device for a press section of a paper machine in a preferred embodiment of the utility model;

[0023] Figure 2 yes Figure 1 The schematic diagram of the structure of the static mixer of the felt cleaning device of the press section of the paper machine is shown;

[0024] Figure 3 yes Figure 2 A schematic structural diagram of a mixing component of a static mixer shown;

[0025] Explanation of the reference numerals in the drawings in the specification: 1. hot water tank; 2. cleaning agent storage tank; 3. pump station; 31. micro metering pump; 4. static mixer; 41. upper sealing flange; 42. mixer cavity; 421. mixing liquid inlet one; 422. mixing liquid inlet two; 43. lower sealing flange; 44. mixing component; 441. groove; 442. columnar body; 443. tangential flow channel; 5. water pump; 6. spray device; 7. one-way valve. DETAILED DESCRIPTION

[0026] The present invention will be further described below in conjunction with the accompanying drawings and specific embodiments so that those skilled in the art can better understand the present invention and implement it, but the embodiments are not intended to limit the present invention.

[0027] Reference Figure 1As shown, a felt cleaning and maintenance device for the pressing section of a paper machine described in the utility model comprises: a hot water tank 1, whose water inlet is connected to the hot water pool of the paper machine through a pipeline; a cleaning agent storage tank 2, for storing cleaning agent; a pump station 3, wherein a micro-metering pump 31 is provided in the pump station 3, and whose liquid inlet is connected to the liquid outlet of the cleaning agent storage tank 2 through a pipeline; a static mixer 4, for mixing the hot water in the hot water tank 1 with the medicine in the cleaning agent storage tank 2; the static mixer 4 is connected to the water outlet of the hot water tank 1 through a water pump 5, and the static mixer 4 is connected to the liquid outlet of the micro-metering pump 31 through a pipeline; a spray device 6, which is connected to the mixing liquid outlet of the static mixer 4 through a pipeline, and is used for cleaning the top and bottom of the felt 100.

[0028] Furthermore, it also includes a vacuum water suction box 7, which is arranged on the upper side or the lower side of the blanket 100, and takes away the residual liquid of medicine above and below the blanket 100 by vacuum absorption.

[0029] Preferably, the spray device 6 includes a spray pipe and a nozzle, one end of the spray pipe is connected to the liquid outlet of the static mixer 4, and the other end of the spray pipe is connected to the nozzle. The adding point of the nozzle is located in front of the vacuum water suction box of the inner circle of the blanket 100. During the suction process of the felt cloth, the cleaning medicine penetrates into every corner of the blanket 100 from the inside to the outside, completely removes the adhesive in the blanket 100, deeply cleans the blanket 100, and finally the residual liquid of the medicine is taken away by the vacuum water suction box.

[0030] The nozzle in this embodiment is an atomizing nozzle, which sprays evenly on the felt 100 to clean the adhesives in the felt 100, ensuring that the air permeability and water permeability of the felt 100 are normal, thereby avoiding paper defects such as felt folds, stabilizing the production operation of the paper machine, and improving production efficiency.

[0031] Preferably, a one-way valve 8 is provided on the pipeline between the static mixer 4 and the cleaning agent storage tank 2. The installation of the one-way valve 8 can prevent water from flowing back into the cleaning agent storage tank 2 and contaminating the cleaning agent.

[0032] In this embodiment, the micro-metering pumps 31 include four, which are connected to the spray pipes through hoses. Generally, a papermaking machine has two nip zones, the first one is the first nip and the second one is the second nip. Each nip zone has two upper and lower blankets 100. The four micro-metering pumps 31 control the flow of cleaning agents for the upper and lower blankets 100 of the first nip and the upper and lower blankets 100 of the second nip, respectively. In this way, the flow rate can be adjusted individually according to the dirtiness of each blanket 100, avoiding waste and saving costs.

[0033] like Figure 2As shown, the static mixer 4 includes an upper sealing flange 41, a mixer cavity 42 and a lower sealing flange 43 connected in sequence from top to bottom, a mixing member 44 is arranged inside the mixer cavity 42, a mixing liquid outlet 45 is arranged at the bottom of the lower sealing flange 43, a mixing liquid inlet 1 421 and a mixing liquid inlet 2 422 are arranged on the side wall of the mixer cavity 42, and the inner cavities of the mixing liquid inlet 1 421 and the mixing liquid inlet 2 422 are connected to the inner cavity of the mixer cavity 42. A cavity structure is formed between the inner wall of the mixer cavity 42 and the outer wall of the mixing member 44.

[0034] like Figure 3 As shown, the mixing member 44 includes a groove 441, a columnar body 442 and a tangential flow channel 443. The columnar body 442 is a columnar cylindrical structure with a certain wall thickness. The upper and lower ends of the columnar body 442 are respectively provided with grooves 441, and the side wall of the columnar body 442 is provided with multiple groups of tangential flow channels 443. The tangential flow channels 443 tangentially penetrate the side wall of the columnar body 442, and the tangential flow channels 443 are evenly arranged in the longitudinal and circumferential directions of the columnar body 442. The design of multiple groups of tangential flow channels 443 can provide a stable and uniform vortex field to ensure uniform mixing of the medicine.

[0035] Obviously, the above embodiments are merely examples for the purpose of clear explanation and are not intended to limit the implementation methods. For those skilled in the art, other different forms of changes or modifications can be made based on the above description. It is not necessary and impossible to list all the implementation methods here. The obvious changes or modifications derived from these are still within the scope of protection of the invention of the utility model.

Claims

1. A felt cleaning device for a paper machine press section, characterized in that: include: A hot water tank, the water inlet of which is connected to the hot water tank of the paper machine through a pipeline; A cleaning agent storage tank, used for storing cleaning agents; A pump station, wherein a micro-metering pump is provided in the pump station, and a liquid inlet of the micro-metering pump is connected to a liquid outlet of the cleaning agent storage tank through a pipeline; A static mixer, used to mix the hot water in the hot water tank with the medicine in the cleaning agent storage tank; the static mixer is connected to the water outlet of the hot water tank through a water pump, and the static mixer is connected to the liquid outlet of the micro-metering pump through a pipeline; The spraying device is connected with the mixing liquid outlet of the static mixer through a pipeline and is used for cleaning the upper and lower parts of the felt.

2. A felt cleaning device for a press section of a paper machine according to claim 1, characterized in that: It also includes a vacuum water suction box, which is arranged on the upper side or the lower side of the blanket and takes away the residual liquid of medicine above and below the blanket through vacuum absorption.

3. A felt cleaning device for a press section of a paper machine according to claim 1, characterized in that: The spray device comprises a spray pipe and a nozzle, one end of the spray pipe is communicated with the liquid outlet of the static mixer, and the other end of the spray pipe is communicated with the nozzle.

4. A felt cleaning device for a press section of a paper machine according to claim 3, characterized in that: The nozzle is an atomizing nozzle.

5. A felt cleaning device for a press section of a paper machine according to claim 1, characterized in that: A one-way valve is arranged on the pipeline between the static mixer and the cleaning agent storage tank.

6. A felt cleaning device for a press section of a paper machine according to claim 3, characterized in that: The micro metering pumps include four units, which are respectively connected to the spray pipes through hoses.

7. A felt cleaning device for a press section of a paper machine according to claim 1, characterized in that: The static mixer comprises an upper sealing flange, a mixer cavity and a lower sealing flange connected in sequence from top to bottom, a mixing component is arranged inside the mixer cavity, a mixing liquid outlet is arranged at the bottom of the lower sealing flange, a mixing liquid inlet 1 and a mixing liquid inlet 2 are arranged on the side wall of the mixer cavity, and the inner cavities of the mixing liquid inlet 1 and the mixing liquid inlet 2 are connected to the inner cavity of the mixer cavity.

8. A felt cleaning device for a press section of a paper machine according to claim 7, characterized in that: A cavity structure is formed between the inner wall of the mixer cavity and the outer wall of the mixing member.

9. A felt cleaning device for a press section of a paper machine according to claim 7, characterized in that: The mixing component includes a groove, a columnar body and a tangential flow channel. The columnar body is a columnar cylindrical structure with a certain wall thickness. The upper and lower ends of the columnar body are respectively provided with grooves, and the side wall of the columnar body is provided with multiple groups of tangential flow channels.

10. A felt cleaning device for a press section of a paper machine according to claim 9, characterized in that: The tangential flow channel tangentially penetrates the side wall of the columnar body, and the tangential flow channel is evenly arranged in the longitudinal direction and the circumferential direction of the columnar body.

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