Paper machine blanket cleaning device

Abstract

The utility model discloses a paper machine blanket cleaning device which comprises a heater, the heater is an inner pipe and outer pipe double-layer heater, high-pressure spraying water enters the inner pipe of the heater, condensate water generated by a drying cylinder in a paper machine enters the outer pipe of the heater, and the inner pipe and the outer pipe are used for heating the high-pressure spraying water in the inner pipe. The heated high-pressure spraying water flows out of the heater and is used for cleaning the blanket, and condensate water passing through the heater is recycled. Compared with the prior art, the cleaning device has the advantages that the cleaning effect of chemical drugs and organic matters on the blanket is effectively improved, the phenomenon that raw paper pinholes are broken and remelted due to poor cleaning of the blanket is reduced, the time loss caused by shutdown alkali washing is reduced, the time efficiency is improved, the water temperature of the blanket is increased, and the service life of the blanket is prolonged. The drying efficiency of the raw paper is improved after contacting with the cylinder surface of the drying cylinder, and the energy consumption is reduced.

Description

TECHNICAL FIELD

[0001] The utility model relates to a paper machine blanket cleaning device. BACKGROUND

[0002] The life paper paper machine wet section uses blanket and forming net, and the pulp is separated after forming by the flow box, and then is pressed, dried, and crimped to take out the paper, and the forming and separation are important to the whole interweaving of the original paper, so the cleaning requirement of the blanket is particularly high; in the normal production process, the pulp, white water and chemicals in the sizing system are separated by the forming and pressing cylinder, and part of the chemicals and fibers and the residual organic matter in the pulp are left on the blanket, and the blanket is cleaned by high-pressure spraying and a large amount of spraying of normal temperature water, the blanket high-pressure spraying (pressure range: 5bar-15bar), and the new blanket is used for 5 days to open 5bar blanket high-pressure, and with the increase of the use time, the blanket high-pressure use pressure also increases, and every 2 days of use increases 1bar of blanket high-pressure, and the blanket high-pressure needs to be increased to the highest pressure 15bar after the blanket is used for 25 days, and the blanket needs to be stopped for 120min for alkali washing after the blanket is used for 30 days, and then every 15 days of increase needs to be stopped for alkali washing.

[0003] 1. The effect of cleaning residual chemicals and organic matter by normal temperature water is poor, so as to increase the pressure of blanket high-pressure water, and the high water pressure will impact the blanket fiber, cause the fiber of the blanket cloth to break, change the state of the blanket, and reduce the service life of the blanket, and a blanket is used for 70-90 days, and frequent replacement of the blanket leads to high production cost;

[0004] 2. The residual chemicals and organic matter in the blanket are not cleaned, which leads to the paper disease of the original paper pinhole and broken hole, especially the deep layer of the blanket, which leads to the original paper pinhole, and the blanket must be stopped for alkali washing to clean the blanket, which increases the downtime and leads to low time efficiency;

[0005] 3. After the blanket is cleaned by normal temperature water, the temperature of the blanket is low, the drying energy consumption is high after the contact with the drying cylinder, and the energy saving is not conducive. UTILITY MODEL CONTENT

[0006] UTILITY MODEL OBJECTIVE: The utility model aims at providing a paper machine blanket cleaning device with good cleaning effect and energy saving and environmental protection.

[0007] Technical solution: The paper machine blanket cleaning device, including heater, the heater is inner and outer tube double layer heater, high pressure spray water enters the inner layer pipe of heater, the condensate produced in the drying cylinder of paper machine enters the outer layer pipe of heater, be used for heating the high pressure spray water of inner layer pipe, the high pressure spray water of heating flows out from the heater and is used for cleaning blanket, the condensate water after heater recovery.

[0008] Further, it also includes water storage tank, high pressure pipe, high pressure pump and second pressure control valve;High pressure pump from water storage tank high pressure spray water pump injection to high pressure pipe, and then sent into the heater;The pressure of high pressure spray water is controlled by second pressure control valve.

[0009] Further, it also includes backflow pipe and first pressure control valve;When the high pressure spray water in high pressure pipe exceeds the maximum pressure, then through the first pressure control valve control high pressure spray water from backflow pipe flows back to water storage tank.

[0010] Further, the blanket cleaning agent is added to the high pressure spray water before the high pressure pump.

[0011] Further, the temperature of high pressure spray water after heater is 65 DEG C to 80 DEG C.

[0012] Further, the pressure of high pressure spray water is 3bar to 10bar.

[0013] Further, the heater includes high pressure water inlet and high pressure water outlet for high pressure spray water import and export, condensate water inlet and condensate water outlet for condensate water import and export;First manual valve, second manual valve, third manual valve, fourth manual valve are respectively arranged at high pressure water inlet, high pressure water outlet, condensate water inlet, condensate water outlet, for manually controlling the opening and closing of valve.

[0014] Further, the flow of condensate water is controlled by temperature control valve before entering the outer layer pipe of heater.

[0015] The paper machine blanket cleaning device of the utility model has the advantages that: 1. the cleaning effect of the chemical medicine and organic matter remaining on the blanket is effectively improved, the paper pinhole breakage caused by poor blanket cleaning is reduced, the shutdown alkali washing loss time is reduced, and the time efficiency is improved; 2. the blanket high-pressure water pressure is reduced from 5bar-15bar to 3bar-10bar, the amount of clean water is reduced, the damage of high pressure to the blanket is reduced, and the service life of the blanket is increased from 70 days-90 days to 100 days-130 days; 3. the water temperature of the blanket is relatively increased, the drying efficiency of the raw paper is increased by 7%-10% after the blanket contacts the cylinder surface of the drying cylinder through the compression roller, and the energy consumption is reduced; 4. after the paper machine uses steam heating drying cylinder, the heat of the high-temperature condensate water is effectively utilized, the high-pressure spraying water is heated through the heater and then sprayed back to the boiler for use, and the energy consumption is reduced. BRIEF DESCRIPTION OF DRAWINGS

[0016] Figure 1 It is a paper machine schematic view of the utility model embodiment;

[0017] Figure 2 It is a cleaning device schematic view of the utility model embodiment;

[0018] Figure 3 It is a heater schematic view of the utility model embodiment;

[0019] Figure 4 It is a work flow chart of the utility model embodiment. DETAILED DESCRIPTION

[0020] The technical scheme of the utility model will be further described below with reference to the drawings.

[0021] As Figure 1 shown, the paper machine schematic view comprises a forming wire 1, a headbox 2, a guide roller 3, a breast roll 4, a compression roller 5, a blanket 6, a drying cylinder 7, a creping doctor 8, a paper breaking eye 9, a winding cylinder 10 and a paper roll 11, and the blanket 6 is cleaned by normal-temperature high-pressure water before passing through the compression roller 5.

[0022] As Figure 2 shown, the paper machine blanket cleaning device of the utility model utilizes the heated high-pressure water to clean the blanket, and the water vapor comprises a water storage tank 12, a high-pressure pipe 13, a high-pressure pump 14, a maximum blanket high-pressure pressure gauge 15, a backflow pipe 16, a first pressure control valve 17, a second pressure control valve 18, a blanket high-pressure pressure gauge 19, a high-pressure water inlet 20, a heater 21 and a high-pressure water outlet 22.

[0023] The utility model discloses a high pressure pump 14 is taken out from the high pressure spray water of water tank 12, when the water pressure in high pressure pipe 13 exceeds maximum blanket high pressure pressure gauge 15, adjusts first pressure control valve 17 and releases the water pressure to water tank 12 with surplus, reaches the blanket high pressure through the opening of second pressure control valve 18 adjustment, and blanket high pressure pressure gauge 19 detects the pressure of blanket high pressure in time, and the blanket high pressure pressure range is at 3bar-10bar, and high pressure spray water enters heater 21 from high pressure water import 20, and after heating, exports from high pressure water export 22, and through the spray, carries out the cleaning to blanket. Double protection high pressure water impact damage to blanket fiber.

[0024] Meanwhile, the utility model still adds the blanket cleaning agent before high pressure pump 14 and adds in blanket high pressure water, and the flow of cleaning agent is 60ml-100ml per minute.

[0025] As shown in Figure 3 Heater 21 is inner and outer tube double-layer heater, and high pressure spray water enters the inner layer pipe of heater 21. The existing paper machine uses steam to heat drying cylinder 7, and then generates condensate water, which is directly recycled to the boiler for reuse. The utility model passes condensate water inlet 23 to enter the outer layer pipe of heater 21, and then passes condensate water outlet 24 to hit back to the boiler for use, and at the same time, the high pressure spray water in the inner layer pipe can be heated. Temperature control valve 26 is arranged at 300cm of condensate water inlet 23, which can be automatically or manually controlled on the DCS screen. According to the production needs, the temperature can be automatically adjusted to control the steam condensate flow to adjust the set temperature of the blanket high pressure spray water. The temperature of steam condensate is 130 DEG C-150 DEG C. When the condensate and the high pressure spray water with cleaning agent pass through heater 21 at the same time, the high temperature condensate in the outer layer heats the high pressure spray water in the inner layer.

[0026] Blanket high pressure thermometer 25 is arranged at 50cm of high pressure water export 22, and the temperature is displayed on the DCS. The temperature range is set to 50 DEG C-100 DEG C. High pressure pump 14 heats the water temperature to 65 DEG C-80 DEG C through heater 21, and then outputs from high pressure water export 22 to blanket high pressure spray pipe 31 to clean the blanket. After the heated high pressure spray water cleans the blanket, the chemical drugs and organic matter remaining on the blanket are cleaned, the cleaning effect is effectively improved, the paper pinhole breakage caused by poor blanket cleaning is reduced, the shutdown alkali washing loss time is reduced, and the time efficiency is improved. At the same time, the moisture temperature of the blanket is also relatively increased by 8 DEG C-10 DEG C. After the cylinder surface of drying cylinder 7 is contacted through pressure roller 5, the drying efficiency of the original paper is increased by 7 %-10 %, which is beneficial to energy saving.

[0027] First, second, third and fourth manual valves 27, 28, 29 and 30 are respectively arranged at high-pressure water inlet 20, high-pressure water outlet 22, condensate water inlet 23 and condensate water outlet 24, and are normally open to facilitate abnormal maintenance.

[0028] As Figure 4 The working flow chart of the utility model is shown in the figure. High-pressure spraying water is obtained from water storage tank 12 by high-pressure pump 14 while adding blanket cleaning agent. When the water pressure in high-pressure pipe 13 exceeds maximum blanket high-pressure pressure gauge 15, adjust first pressure control valve 17 to release the excess water to water storage tank 12 through return pipe 16, and adjust second pressure control valve 18 to control the water pressure. The high-pressure spraying water enters heater 21. Steam generated in the boiler is input into drying cylinder 7 to generate condensate water. The condensate water enters heater 21 to heat the high-pressure spraying water, and then flows back to the boiler. The heated high-pressure spraying water cleans the blanket through blanket high-pressure spraying pipe 31.

Claims

1. A paper machine felt cleaning device characterized by, The heater (21) is a double-layer heater with inner and outer tubes. High-pressure spray water enters the inner tube of the heater (21), and the condensate water produced by the dryer (7) in the paper machine enters the outer tube of the heater (21) to heat the high-pressure spray water in the inner tube. The heated high-pressure spray water flows out of the heater (21) to clean the felt (6), and the condensate water passing through the heater (21) is recovered.

2. The paper machine blanket cleaning apparatus of claim 1 wherein, The water storage tank (12), high-pressure pipe (13), high-pressure pump (14), and second pressure control valve (18) are also included. The high-pressure pump (14) pumps high-pressure spray water from the water storage tank (12) into the high-pressure pipe (13) and then into the heater (21). The pressure of the high-pressure spray water is controlled by the second pressure control valve (18).

3. The paper machine blanket cleaning apparatus of claim 2, wherein, The return pipe (16) and first pressure control valve (17) are also included. When the pressure of the high-pressure spray water in the high-pressure pipe (13) exceeds the maximum pressure, the high-pressure spray water flows back to the water storage tank (12) through the first pressure control valve (17).

4. The paper machine blanket cleaning apparatus of claim 2, wherein, The felt cleaning agent is added to the high-pressure spray water before the high-pressure pump (14).

5. The paper machine blanket cleaning apparatus of claim 1 wherein, The temperature of the high-pressure spray water after passing through the heater (21) is 65-80°C.

6. The paper machine blanket cleaning apparatus of claim 1 wherein, The pressure of the high-pressure spray water is 3-10 bar.

7. The paper machine blanket cleaning apparatus of claim 1 wherein, The heater (21) includes high-pressure water inlet (20) and outlet (22) for high-pressure spray water, and condensate water inlet (23) and outlet (24) for condensate water. First, second, third, and fourth manual valves (27, 28, 29, 30) are respectively arranged at the high-pressure water inlet (20), outlet (22), condensate water inlet (23), and outlet (24) for manual control of the valve opening and closing.

8. The paper machine blanket cleaning apparatus of claim 1 wherein, The temperature control valve (26) is used to control the flow of condensate water before it enters the outer tube of the heater (21).

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