CN213203625U

CN213203625U - Dewatering monitoring device for papermaking press felt

Info

Publication number: CN213203625U
Application number: CN202020507551.8U
Authority: CN
Inventors: 张金波; 张培; 钟愉曾; 黄再洪
Original assignee: Zhongshan Yongfa Paper Industries Co ltd
Current assignee: Zhongshan Yongfa Paper Industries Co ltd
Priority date: 2020-04-08
Filing date: 2020-04-08
Publication date: 2021-05-14
Anticipated expiration: 2030-04-08

Abstract

The utility model provides a papermaking press felt's dehydration monitoring devices, including locating the press felt on and be used for siphoning away the vacuum chamber of the moisture content on the press felt, with vacuum chamber pipeline intercommunication and be used for carrying out the catch water steam separator of steam-water separation to the moisture content of siphoning away, locate the evacuation pipe on the vacuum output of vapour-water separator, locate the drain pipe on the liquid output end of vapour-water content separator, locate the output of drain pipe and be used for collecting the water seal groove of the moisture content of siphoning away, locate the fluid-discharge tube of the output of water seal groove, be equipped with the vacuum pump that is used for the evacuation on the evacuation pipe, be equipped with on the fluid-discharge tube and be used for discharging the water pump to the plain boiled water pond with the moisture content in the water seal groove, be equipped with the drainage flowmeter that is used for monitoring through the fluid-. The utility model discloses simple structure, the installation of being convenient for, the dehydration situation can realize continuous monitoring, is convenient for monitor the dehydration effect, can accurately judge the in-service life cycle of woollen blanket, has effectively guaranteed the production efficiency and the product quality of board.

Description

Dewatering monitoring device for papermaking press felt

[ technical field ] A method for producing a semiconductor device

The utility model relates to a dewatering monitoring device of papermaking press felt.

[ background of the invention ]

The press part plays a role in the whole paper making machine after the beginning, the wet paper has a large water content after the formation of the wire part, the dryness is usually about 20%, a part of free water among fibers of the wet paper is removed by a mechanical pressing method and then is sent to the next procedure for drying, and the removal of 1% of water in the press part is generally considered to save 5% of steam for subsequent drying. The dewatering of the wet paper sheet in the press section is typically performed by a pair of oppositely traveling press rolls forming a nip, and the wet paper sheet is carried into the nip by a press felt, whereupon water squeezed from the wet paper sheet is absorbed by the felt and transferred to the felt where it is removed by a felt vacuum box. It can be seen that press felts play a critical role in the production run of the press section of a paper machine.

The quality of the dewatering effect in the press section depends primarily on the press configuration and type, nip pressure and time, press felt configuration and performance, wet sheet basis weight, and slurry properties. As a consumable product of the process, the press felt needs to be replaced periodically, and in a service cycle, under the condition that the process conditions of the paper machine are basically not changed, the dehydration process of the press felt is changed periodically, namely, the dehydration amount from the time when the felt is on the machine to the time when the felt is off the machine is gradually reduced, when the pores of the felt are basically blocked, the press felt cannot meet the normal production of the paper machine, and at the moment, the press felt needs to be off the machine and replaced by a new felt to enter the next cycle. In the production practice, the use periods of the felts are not completely the same due to the influence of the changes of the process conditions such as sizing agent, cleaning and the like, the dewatering effect of the felts is reduced to the limit value, which is usually judged by the experience of operators, and whether the felts are replaced or not is determined. Subjective differences and even judgment deviations are easy to exist according to the experience of operators, so that the blanket is discharged in advance or after being delayed, the waste of process supplies is caused when the blanket is discharged in advance, the production cost is increased, and the stability of the water discharged from the paper machine is possibly influenced when the blanket is discharged after being pushed, the subsequent drying steam consumption is increased, and even the normal production of the paper machine is influenced. Even the existing blanket water content and air permeability monitoring instrument is generally only used for instantaneous detection due to higher price and inconvenient maintenance.

[ Utility model ] content

The to-be-solved technical problem of the utility model is to provide a dehydration monitoring devices of papermaking press felt that the structure is simple relatively, the running cost is low and realize continuous monitoring easily.

The purpose of the utility model is realized like this:

the utility model provides a dehydration monitoring devices of papermaking press felt, including locate on the press felt and be used for siphoning away the vacuum chamber of the moisture content on the press felt, with vacuum chamber pipeline intercommunication just is used for carrying out steam separator of steam-water separation to the moisture content of siphoning away, locate drain pipe on steam-water separator's the vacuum output, locate drain pipe on steam-water separator's the liquid output end, locate the output of drain pipe just is used for collecting the water seal groove of the moisture content of siphoning away, locate the fluid-discharge tube of the output of water seal groove, be equipped with the vacuum pump that is used for the evacuation on the drain pipe, be equipped with on the fluid-discharge tube and be used for with the water pump of water seal inslot moisture content to plain boiled water pond, be equipped with on the fluid-discharge tube and be used for monitoring the warp drainage flowmeter of the liquid flow that the fluid-.

The dewatering monitoring device for the papermaking press felt is characterized in that the high-pressure water pipe and the low-pressure water pipe are arranged on the press felt, the high-pressure water pipe is used for spraying high-pressure water to the press felt for cleaning, the low-pressure water pipe is used for spraying low-pressure water to the press felt for lubricating, and the high-pressure water flow meter and the low-pressure water flow meter are respectively arranged on the high-pressure water pipe and the low-pressure water pipe.

According to the dewatering monitoring device for the papermaking press felt, the drain pipe is provided with the check valve, and the emptying pipe, the high-pressure water pipe and the low-pressure water pipe are respectively provided with the gate valve.

The dewatering monitoring device for the papermaking press felt is characterized in that the water seal groove is provided with a liquid level sensor for monitoring the liquid level of the water seal groove.

Compared with the prior art, the utility model, have following technical characterstic:

1. the structure is simple, and the installation is convenient; 2. the dewatering condition of the press felt can be continuously monitored, so that the dewatering effect of the press felt can be conveniently monitored; 3. the actual service cycle of the blanket can be accurately judged; 4. effectively guaranteeing the production efficiency and the product quality of the machine table.

[ description of the drawings ]

The following detailed description of embodiments of the present invention is provided with reference to the accompanying drawings, in which:

fig. 1 is a schematic structural diagram of the present invention.

[ detailed description ] embodiments

The utility model provides a dehydration monitoring devices of papermaking press felt, including locating on the press felt 100 and be used for siphoning away vacuum box 1 of moisture content on the press felt 100, with vacuum box 1 pipeline intercommunication and be used for carrying out steam-water separator 2 of steam-water separation to the moisture content of siphoning away, locate evacuation pipe 3 on steam-water separator 2's the vacuum output, locate drain pipe 4 on steam-water separator 2's the liquid output end, locate the output of drain pipe 4 and be used for collecting the water seal groove 5 of the moisture content of siphoning away, locate the fluid-discharge tube 6 of the output of water seal groove 5, be equipped with the vacuum pump 7 that is used for the evacuation on evacuation pipe 3, be equipped with on fluid-discharge tube 6 and be used for discharging the water pump 8 to the water pump in the water seal groove 5 pond, be equipped with the drainage flowmeter 9 that is used for monitoring the liquid flow through fluid-discharge tube 6 drainage.

The press felt 100 is provided with a high-pressure water pipe 200 for spraying high-pressure water to the press felt 100 to clean the same and a low-pressure water pipe 300 for spraying low-pressure water to the press felt 100 to lubricate the same, and the high-pressure water pipe 200 and the low-pressure water pipe 300 are respectively provided with a high-pressure water flow meter 400 and a low-pressure water flow meter 500. The nozzle of the high pressure water pipe 200 is movable laterally relative to the press felt 100 for cleaning. The high pressure water flow meter 400 and the low pressure water flow meter 500 may employ electromagnetic flow meters for metering the flow rate of high pressure cleaning water in the high pressure water pipe 200 and for metering the flow rate of low pressure lubrication water in the low pressure water pipe 300, respectively. The drain flow meter 9 may also employ an electromagnetic flow meter for measuring the flow rate of the drain water in the drain pipe 6.

The drain pipe 6 is provided with a check valve 10 to effectively prevent the backflow of the discharged moisture, and the drain pipe 3, the high pressure water pipe 200 and the low pressure water pipe 300 are all provided with gate valves 11.

The water seal tank 5 is provided with a liquid level sensor 51 for monitoring the liquid level of the water seal tank 5, and the liquid level of the water seal tank 5 can be controlled by the liquid level sensor 51 and the water pump 8. The evacuation pipe 3 is provided with a pressure sensor 71 for monitoring the vacuum degree of the vacuum box 1.

The utility model discloses during the use, wet paper page or leaf 20 gets into the closed region who is formed by squeezing roll 30 and carries out the extrusion dehydration under press felt 100's transmission, press felt 100 absorbs the moisture content of wet paper page or leaf 20 transfer and wash through high pressure water pipe 200 (cleaning action) and low pressure water pipe 300 (lubrication action) after, then take away moisture content wherein by vacuum box 1, the moisture content that vacuum box 1 was taken out carries out steam-water separation through catch water 2, moisture content flows into water seal groove 5 through drain pipe 4 from its lower extreme, gas is taken away through evacuation pipe 3 from its upper portion by vacuum pump 8, water in the water seal groove 5 is pumped to the plain boiled water pond by water pump 8. The real-time dewatering amount of the press felt 100 is the real-time data of the drainage flow meter 9 (the flow rate of water transferred by the metering pump 8), the real-time data of the high-pressure water flow meter 400 (the flow rate of high-pressure water), and the real-time data of the low-pressure water flow meter 500 (the flow rate of low-pressure water). A mathematical model between the dewatering amount and the running time of the press felt is established through PLC (programmable logic controller) integration and big data analysis according to the data of the electromagnetic flow meter acquired at regular time (such as the interval of 30-60 seconds), and a continuous and reliable judgment basis can be provided for the dewatering condition of the press felt 100. A functional relation curve of dewatering amount (Y) -operation time (X) of the press felt is established, and the dewatering condition and the use condition of the press felt are reflected by measuring the instantaneous dewatering amount of the press felt for absorbing moisture of a wet paper sheet, so that the operation efficiency and the operation condition of the press felt and a press part are effectively monitored.

The utility model discloses can be on original press felt dewatering system's basis, realize carrying out online continuous monitoring to press felt's dehydration situation through increasing equipment such as water seal groove, frequency conversion water pump, flowmeter, change and rely on the way of subjective experience judgement press felt situation of use, accomplish the best of things, avoid the erroneous judgement to cause the waste of technology articles for use, also reduce because of pressing reasons such as felt jam and to the influence that paper machine press portion production operation led to the fact.

Claims

1. A dehydration monitoring device of a paper-making press felt is characterized by comprising a vacuum box (1) which is arranged on the press felt (100) and used for absorbing water on the press felt (100), a steam-water separator (2) which is communicated with a pipeline of the vacuum box (1) and used for carrying out steam-water separation on the absorbed water, an evacuation pipe (3) which is arranged on a vacuum output end of the steam-water separator (2), a liquid outlet pipe (4) which is arranged on a liquid output end of the steam-water separator (2), a water seal tank (5) which is arranged on an output end of the liquid outlet pipe (4) and used for collecting the absorbed water, and a liquid outlet pipe (6) which is arranged on an output end of the water seal tank (5), wherein a vacuum pump (7) used for vacuumizing is arranged on the evacuation pipe (3), a water pump (8) used for exhausting the water in the water seal tank (5) to a white water pool is arranged on the liquid outlet pipe (6), and a drainage flowmeter (9) for monitoring the flow of the liquid discharged through the liquid discharge pipe (6) is arranged on the liquid discharge pipe (6).

2. The dewatering monitoring device for a papermaking press felt according to claim 1, wherein the press felt (100) is provided with a high pressure water pipe (200) for spraying high pressure water to the press felt (100) for cleaning and a low pressure water pipe (300) for spraying low pressure water to the press felt (100) for lubrication, and the high pressure water pipe (200) and the low pressure water pipe (300) are provided with the high pressure water flow meter (400) and the low pressure water flow meter (500), respectively.

3. The dewatering monitoring device for a papermaking press felt according to claim 2, characterized in that the drain pipe (6) is provided with a check valve (10), and the drain pipe (3), the high pressure water pipe (200) and the low pressure water pipe (300) are provided with gate valves (11).

4. A dewatering monitoring device for a papermaking press felt according to any one of claims 1 to 3, characterized in that the water seal tank (5) is provided with a level sensor (51) for monitoring a liquid level thereof.