CN217781575U - Vacuum white water tank for dewatering of inclined wire paper machine - Google Patents

Abstract

The utility model discloses a vacuum plain boiled water jar of inclined wire paper machine dehydration includes a main tank body, the lower extreme of the main tank body be connected with a thick liquids outlet pipe, the top of the main tank body is equipped with the vacuum suction mouth, is equipped with vacuum plain boiled water import and plain boiled water overflow mouth on the side of the main tank body, the horizontal position of plain boiled water overflow mouth will be higher than vacuum plain boiled water import, the principle of this vacuum plain boiled water jar is connected the vacuum pump pipeline in the top of vacuum suction mouth for plain boiled water is inhaled the plain boiled water jar by the vacuum pump pipeline from vacuum plain boiled water import, then adjusts the speed that inclined wire paper machine becomes the mould box dehydration through the vacuum of adjusting vacuum plain boiled water jar overhead, and can connect electromagnetic flowmeter and governing valve on vacuum plain boiled water import, realizes the control and measures the dehydration volume of mould box.

Description

Vacuum white water tank for dewatering of inclined wire paper machine

Technical Field

The utility model relates to a papermaking equipment field especially relates to a vacuum plain boiled water jar of inclined wire paper machine dehydration.

Background

As Chinese economy enters a high-quality development stage, the urbanization process is accelerated, the consumption level is upgraded, and the special paper market in China keeps continuously growing. The special paper belongs to high-tech products, has higher added value, and most of the special paper is made of long fiber raw materials, which comprise inorganic fibers such as synthetic fibers and glass fibers and other special fibers such as aramid paper, paper for electrical industry, glass fiber filter paper, tea filter paper and the like. The inclined wire paper machine can be well adapted to manufacturing paper by separately using the long fiber paper pulp such as softwood pulp or matching with a certain amount of industrial fibers in a mixed mode. Thus, in modern papermaking, the inclined wire machine has gained special status and wide application in the production of specialty paper. The inclined net papermaking can greatly reduce the concentration of the upper-net pulp to 0.02-0.05% or even lower, solve the problem of uniform suspension of long fibers and prevent the fibers from flocculation, thereby ensuring the uniformity of paper sheets and improving the dewatering efficiency. The dewatering pressure difference is a dynamic parameter for ensuring inclined wire dewatering, and is used for finishing the whole-course stable and uniform dewatering under the constant dewatering pressure difference, so that the good bulk and air permeability of paper sheets are ensured. Inclined wire machine forming box dewatering now generally has two ways: one method adopts a vacuum water-sealed water tank, the liquid level difference between an inclined wire forming box and the water-sealed water tank generates vacuum suction, and the height difference between the forming box and the water-sealed water tank is basically fixed, so the dehydration pressure difference is fixed, the dehydration pressure difference cannot be adjusted, and the requirement of special paper on great change of the wire concentration on a paper machine cannot be met; the other method is to adopt a mode of adding a water-sealed water tank to a vacuum main pipe to control the dehydration pressure difference, and the mode is difficult to solve the requirement of flexibly adjusting the dehydration pressure difference. Therefore, a new structure is needed to be designed to deal with the technical difficulties of large dewatering amount of long fiber slurry inclined wire forming and large variation of upper wire concentration.

Disclosure of Invention

In order to solve the problem, the utility model provides a can adjust the forming box dehydration rate through control vacuum to can further control and measure the vacuum plain boiled water jar of the inclined wire paper machine dehydration of the dehydration volume of forming box.

In order to reach above-mentioned purpose, the utility model discloses a vacuum plain boiled water jar of inclined wire paper machine dehydration, vacuum plain boiled water jar include a main jar of body, the lower extreme of the main jar of body be connected with a thick liquids outlet pipe, the main jar of body is equipped with the toper bottom connecting into the one end of thick liquids outlet pipe, insert thick liquid inlet pipe in the thick liquids outlet pipe, the direction of thick liquids outlet pipe and thick liquids inlet pipe is unanimous, the top of the main jar of body is equipped with vacuum suction mouth, exhaust vent, vacuum meter interface, pressure sensor interface and overhauls the hand-hole, is equipped with vacuum plain boiled water import, plain boiled water overflow mouth and level gauge interface on the side of the main jar of body, plain boiled water overflow mouth horizontal position will be higher than vacuum plain boiled water import, vacuum plain boiled water jar be closed system. The vacuum pump is connected to the vacuum suction port and can adjust the vacuum degree of the top space of the white water tank, the dewatering speed of the forming box of the inclined mesh paper machine is adjusted by adjusting the vacuum degree of the vacuum of the white water tank, white water in the vacuum white water tank flows out through the slurry outlet pipeline to dilute and flush slurry of thick slurry of the inclined mesh paper machine, redundant white water flows to the redundant white water tank from the white water overflow port on the side surface of the tank top, and the vacuum white water inlet is provided with the flowmeter and the regulating valve for controlling and measuring the dewatering amount of the forming box.

The vacuum white water inlet is submerged by the white water liquid level height in the main tank body. The tank body adjusts the dewatering speed of the forming box of the inclined wire paper machine by controlling the vacuum degree, the white water overflow port is sealed by water before the vacuum pump sucks air, and after the liquid surface is submerged in the vacuum white water inlet, the air pressure difference is changed by adjusting and controlling the vacuum degree above the liquid surface, so that the liquid surface is maintained and adjusted and controlled. .

In a further proposal, the height and the diameter of the main tank body are adapted to the sizing amount of the inclined wire paper machine and the dewatering amount of the forming box.

In a further scheme, the taper angle of the tapered bottom is 30-40 degrees. The selection is carried out according to the characteristics of the pulp, the pulp in the white water separated from the inclined net is easy to settle and accumulate, and a conical part with a smaller angle can be designed and selected, so that the white water enters the pulp flushing pipeline opening in an accelerated manner, and is not easy to accumulate at the bottom of the tank to form pulp blocks.

In a further scheme, the insertion angle of the thick slurry inlet pipeline relative to the thick slurry outlet pipeline is 4-7 degrees. So as to fully dilute and flush the thick slurry and ensure that the slurry at the slurry outlet is uniformly mixed and dispersed.

The utility model discloses a vacuum plain boiled water jar of inclined wire paper machine dehydration includes a main tank body, the lower extreme of the main tank body be connected with a sizing agent export pipeline, the top of the main tank body is equipped with the vacuum suction mouth, be equipped with vacuum plain boiled water import and plain boiled water overflow mouth on the side of the main tank body, the horizontal position of plain boiled water overflow mouth should be higher than vacuum plain boiled water import, the principle of this vacuum plain boiled water jar is to connect the vacuum pump pipeline in the top of vacuum suction mouth for plain boiled water is inhaled the plain boiled water jar by the vacuum pump pipeline from vacuum plain boiled water import, then can adjust the speed of inclined wire paper machine forming box dehydration through the empty vacuum of adjusting the vacuum plain boiled water jar overhead, and can connect flowmeter and governing valve on the plain boiled water import of vacuum, realize control and measure the dehydration volume of forming box, this vacuum plain boiled water jar has inclined wire paper machine forming box dehydration differential pressure to require to change greatly, the nimble characteristics of vacuum regulation, can take out the dissolved air behind the dehydration of the special type of paper pulp out simultaneously, this fine has solved the difficult even problem of paper pulp on-net shaping, through increasing this vacuum plain boiled water jar and has improved the shaping evenness degree of paper, has solved the long fiber pulp sizing agent, the big difficult concentration of the big difficult to change of the big difficulty of the big concentration of the shaping.

Drawings

FIG. 1 is a schematic top view of the structure of example 1;

fig. 2 is a schematic front view of the structure of embodiment 1.

Detailed Description

To further illustrate the technical means and effects of the present invention adopted to achieve the objects of the present invention, the following detailed description of the embodiments, structures, features and effects according to the present invention will be made with reference to the accompanying drawings and preferred embodiments.

Example 1.

As shown in fig. 1 and fig. 2, the vacuum white water tank for dewatering of an inclined wire paper machine described in this embodiment includes a main tank body 1, a finished pulp outlet pipe 2 is connected to a lower end of the main tank body 1, a tapered bottom 3 is provided at one end of the main tank body 1 connected to the pulp outlet pipe 2, a thick pulp inlet pipe 4 is inserted into the finished pulp outlet pipe 2, directions of the finished pulp outlet pipe 2 and the thick pulp inlet pipe 4 are the same, a vacuum suction port 5, an exhaust vent 6, a vacuum meter interface 12, a pressure sensor interface 7 and an inspection inlet hole 8 are provided at a top end of the main tank body 1, a vacuum white water inlet 9, a white water overflow port 10 and a level meter interface 11 are provided on a side surface of the main tank body 1, a horizontal position of the white water overflow port 10 is higher than the vacuum white water inlet 9, and the vacuum white water tank is a closed system. The level of the white water in the main tank body 1 is higher than that of the white water to submerge the vacuum white water inlet 9.

The height and the diameter of the main tank body 1 are adapted to the sizing amount of the inclined wire paper machine and the dewatering amount of the forming box. The white water is selected optimally according to the raw material proportion of different special paper.

The taper angle of the tapered bottom 3 is 30-40 degrees. The inserting angle of the thick slurry inlet pipeline 4 relative to the thick slurry outlet pipeline 2 is 4-7 degrees.

The foregoing is illustrative of the preferred embodiments of the present invention and is not to be construed as limiting thereof, although the invention is described in detail in the context of the preferred embodiments, which are not intended to limit the invention. Any person skilled in the art should make equivalent embodiments with equivalent changes by using some changes or modifications without departing from the technical scope of the present invention, and any brief introduction modifications, equivalent changes and modifications made to the above embodiments according to the technical spirit of the present invention still belong to the technical scope of the present invention.

Claims (5)

1. A vacuum white water tank for dewatering of an inclined wire paper machine is characterized by comprising a main tank body (1), a slurry outlet pipeline (2) is connected to the lower end of the main tank body (1), a conical bottom (3) is arranged at one end of the main tank body (1) connected to the slurry outlet pipeline (2), a thick slurry inlet pipeline (4) is inserted into the slurry outlet pipeline (2), the directions of the slurry outlet pipeline (2) and the thick slurry inlet pipeline (4) are consistent, a vacuum suction port (5), an exhaust vent port (6), a vacuum meter interface (12), a pressure sensor interface (7) and an inspection inlet hole (8) are arranged at the top end of the main tank body (1), a vacuum white water inlet (9), a white water overflow port (10) and a liquid level meter interface (11) are arranged on the side face of the main tank body (1), the horizontal position of the white water overflow port (10) is higher than the vacuum white water inlet (9), and the vacuum white water tank is a closed system.

2. Vacuum whitewater tank for inclined wire paper machine dewatering according to claim 1, characterized in that the whitewater level height in the main tank body (1) submerges the vacuum whitewater inlet (9).

3. Vacuum white water tank for inclined wire machine dewatering according to claim 1, characterized in that the height and diameter of the main tank body (1) are adapted to the sizing capacity of the inclined wire machine and the dewatering capacity of the forming box.

4. Vacuum white water tank for inclined wire paper machine dewatering according to claim 1, characterized in that the taper angle of the conical bottom (3) is 30-40 degrees.

5. The vacuum white water tank for inclined wire paper machine dewatering according to claim 1, characterized in that the insertion angle of the thick stock inlet pipe (4) relative to the stock outlet pipe (2) is 4-7 degrees, and the vacuum white water tank for inclined wire paper machine dewatering.

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