CN210104438U

CN210104438U - Papermaking sizing system

Info

Publication number: CN210104438U
Application number: CN201920859810.0U
Authority: CN
Inventors: ***
Original assignee: Guangdong Lee and Man Paper Manufacturing Co Ltd
Current assignee: Guangdong Lee and Man Paper Manufacturing Co Ltd
Priority date: 2019-06-06
Filing date: 2019-06-06
Publication date: 2020-02-21
Anticipated expiration: 2029-06-06

Abstract

The utility model relates to a papermaking sizing system, including the sizing pond, white water bucket and net preceding sieve, be equipped with first stuff pump between sizing pond and the white water bucket, first stuff pump connects the sizing pond, first stuff pump communicates white water bucket through first pipeline, and first pipeline extends to discharge gate one side inside the white water bucket, be equipped with second stuff pump and second pipeline between white water bucket and the net preceding sieve, second stuff pump communicates net preceding sieve through the second pipeline, be equipped with eccentric taper pipe between the discharge gate of white water bucket and the second stuff pump, the discharge gate of white water bucket communicates the import of second stuff pump through eccentric taper pipe, this sizing system has realized the mesh of thick stock and white water intensive mixing through the form of letting in the pipeline to the inside of white water bucket, utilize the frequency conversion control effect of inverter pump and the throttle valve's throttle control effect, the mesh of the transport flow of accurate control paper stock has been realized, and then the stability of the paper stock concentration after mixing dilution has been improved, so as to achieve the aim of improving the uniformity of longitudinal basis weight of the finished paper web.

Description

Papermaking sizing system

Technical Field

The utility model belongs to the technical field of the papermaking, concretely relates to papermaking starching system.

Background

In the sizing process of papermaking, before thick paper pulp in a pulp forming pool is pumped into a head box, the thick paper pulp needs to be mixed and diluted with white water in a white water bucket and screened by a screen in front of a net to remove fiber clusters, then the white water is pumped into the head box by a pulp pump and then sprayed onto a net part to form a paper web of finished paper.

SUMMERY OF THE UTILITY MODEL

Therefore, for the mixed dilution mode that lets in the pipeline of carrying thick paper pulp with white water mentioned in the solution above-mentioned background art appears mixing insufficient problem easily, the utility model provides a papermaking starching system.

In order to solve the above problem, the utility model provides a following technical scheme:

a papermaking sizing system comprises a sizing pond, a white bucket and a screen, wherein a first slurry pump is arranged between the sizing pond and a feed inlet of the white bucket, an inlet of the first slurry pump is connected with the sizing pond, a first pipeline is arranged between an outlet of the first slurry pump and the white bucket, one end of the first pipeline is connected with an outlet of the first slurry pump, the other end of the first pipeline penetrates into the white bucket and extends to one side of a discharge outlet of the white bucket, a second slurry pump and a second pipeline are arranged between the white bucket and the screen, one end of the second pipeline is connected with an outlet of the second slurry pump, the other end of the second pipeline is connected with the screen, an eccentric conical pipe is arranged between a discharge outlet of the white bucket and an inlet of the second slurry pump, one end of the eccentric conical pipe is communicated with a discharge outlet of the white bucket, the other end of the eccentric conical pipe is communicated with an inlet of the second slurry pump.

Furthermore, the first pulp pump and the second pulp pump are frequency conversion pumps, and the purpose of controlling the pulp flow in the first pipeline and the second pipeline is realized through frequency conversion control, so that the effect of effectively controlling the dilution concentration of the pulp after mixing the thick pulp and the white water can be realized, and the stability of the fiber content in the mixed pulp is improved.

Further, the exit position of first thick liquid pump is higher than the feed inlet position of white cask, the vertical setting of first pipeline is in first thick liquid pump with between the white cask, be equipped with the choke valve on the first pipeline, install the high accuracy choke valve on the first pipeline of vertical setting, can play and ensure that thick paper pulp can pass through the effect of choke valve with the form that is full of first pipeline inside, and then play the effect of the flow control precision of guaranteeing the choke valve, be equipped with the frequency conversion effect of first thick liquid pump in addition, further improve the accurate control to thick paper pulp delivery flow, play the effect of better assurance paper pulp mixing uniformity and stability.

Further, the caliber of the eccentric taper pipe becomes gradually smaller in the direction leading from the white water bucket to the second slurry pump, namely, one end with the large diameter of the eccentric conical pipe is communicated with the white water barrel, one end with the small diameter of the eccentric conical pipe is communicated with the second slurry pump, under the pumping action of the first slurry pump, the thick paper pulp in the first pipeline enters the white water bucket and impacts and collides with the white water in the white water bucket, further realizing the purpose of fully mixing the thick paper pulp and the white water, the thick paper pulp which enters the white water barrel and is fully mixed with the white water can diffuse into the white water barrel under the diffusion action, therefore, one end with the large diameter of the eccentric conical pipe is communicated with the white water barrel, can play the increase the effect of the extraction scope of second stuff pump is realized the second stuff pump fully extracts the purpose of the paper pulp in the white water bucket has still played the bubble that produces when reducing the mixture and is in the effect of near the discharge gate gathering of white water bucket.

Furthermore, the vertical distance between the top of the white water bucket and the discharge port at the bottom of the white water bucket is more than 10m, so that the liquid level of the white water in the white water bucket is more than 10m, the liquid level height of the white water is more than 10m, the stability of the white water at the bottom of the white water bucket can be ensured, and the quality of the mixed paper pulp can be ensured.

The utility model discloses the beneficial effect who produces does: simple structure, reasonable in design through letting in the inside form of plain boiled water bucket with the pipeline, has realized the purpose of thick paper pulp and plain boiled water intensive mixing, utilizes the frequency conversion control effect of inverter pump and the throttle control effect of being equipped with the choke valve, has realized the purpose of the flow of delivery of accurate control paper pulp, and then has improved the stability of the paper pulp concentration after mixing the dilution to realize improving the purpose of the vertical quantitative homogeneity of finished product paper web.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.

Fig. 1 is a schematic structural diagram of a papermaking sizing system according to the present invention;

wherein, 1, a pulping tank; 2. a white water bucket; 3. screening before a net; 4. a first slurry pump; 5. a first conduit; 6. A second slurry pump; 7. a second conduit; 8. an eccentric tapered tube; 9. a throttle valve; 10. a headbox.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely below, and it should be apparent that the described embodiments are only some embodiments of the present invention, but not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts belong to the protection scope of the present invention.

The following description of the embodiments of the present invention will be made with reference to the accompanying drawings.

Referring to fig. 1, a papermaking sizing system comprises a sizing tank 1, a white water barrel 2 and a screen head 3, wherein a first slurry pump 4 is arranged between the sizing tank 1 and a feed inlet of the white water barrel 2, an inlet of the first slurry pump 4 is connected with the sizing tank 1, a first pipeline 5 is arranged between an outlet of the first slurry pump 4 and the white water barrel 2, one end of the first pipeline 5 is connected with an outlet of the first slurry pump 4, the other end of the first pipeline 5 penetrates into the white water barrel 2 and extends to one side of a discharge outlet of the white water barrel 2, a second slurry pump 6 and a second pipeline 7 are arranged between the white water barrel 2 and the screen head 3, one end of the second pipeline 7 is connected with an outlet of the second slurry pump 6, the other end of the second pipeline 7 is connected with the screen head 3, an eccentric cone-shaped pipe 8 is arranged between the discharge outlet of the white water barrel 2 and the inlet of the second slurry pump 6, one end of the eccentric cone-shaped pipe 8 is communicated with the discharge outlet of the white water barrel 2, the other end of the eccentric cone, the outlet end of the first pipeline 5 is arranged near one side of the discharge hole of the white water barrel 2, so that the thick paper pulp can be fully mixed with the white water, and the mixed paper pulp can be extracted out of the white water barrel 2 by the second pulp pump 6 in time, so that the effect of avoiding overlarge diffusion range of the thick paper pulp in the white water barrel 2 is achieved.

Wherein, first stuff pump 4 and second stuff pump 6 are the inverter pump, through the frequency conversion control to first stuff pump 4 and second stuff pump 6, realize carrying out the purpose of control to the paper pulp flow in first pipeline 5 and the second pipeline 7, and then can play the effect of the dilute concentration of the mixed back paper pulp of effective control thick paper pulp and plain boiled water, improved the stability of fibre content in the mixed back paper pulp.

Referring to fig. 1, the exit position of first stuff pump 4 is higher than the feed inlet position of plain boiled water bucket 2, first pipeline 5 is vertical to be set up between first stuff pump 4 and plain boiled water bucket 2, be equipped with choke valve 9 on first pipeline 5, install choke valve 9 on vertical first pipeline 5 who sets up, can play and ensure that thick paper pulp can pass through the effect of choke valve 9 with the form that is full of first pipeline 5 inside, and then play the effect of the flow control precision of guaranteeing choke valve 9, in addition be equipped with the frequency conversion effect of first stuff pump 4, the accurate control to thick paper pulp delivery flow has further been improved, play the better effect of guaranteeing paper pulp mixing uniformity and stability.

Referring to fig. 1, the diameter of the eccentric tapered pipe 8 becomes gradually smaller in the direction leading from the white water tub 2 to the second slurry pump 6, namely, one end with large diameter of the eccentric conical pipe 8 is communicated with the white water barrel 2, one end with small diameter of the eccentric conical pipe 8 is communicated with the second slurry pump 6, under the pumping action of the first slurry pump 4, the thick pulp in the first pipe 5 enters the inside of the white water bucket 2, and collides with the white water in the white water bucket 2, further, the purpose of fully mixing the thick paper pulp and the white water is realized, the thick paper pulp which enters the white water barrel 2 and is fully mixed with the white water can be diffused to the inside of the white water barrel 2 under the diffusion effect, therefore, one end with the large diameter of the eccentric conical pipe 8 is communicated with the white water barrel 2, can play a role of increasing the extraction range of the second pulp pump 6 so as to realize the purpose that the second pulp pump 6 can fully extract the pulp in the white water barrel 2, this arrangement also serves to reduce the accumulation of air bubbles generated during mixing near the discharge port of the white water tub 2.

Wherein, the vertical distance between the top of plain boiled water bucket 2 and the plain boiled water bucket 2 bottom discharge gate is greater than 10m, can make the plain boiled water liquid level in plain boiled water bucket 2 be greater than 10m, and the height of plain boiled water liquid level is greater than 10m, can play the effect of guaranteeing the stability of plain boiled water in plain boiled water bucket 2 bottom, plays the better effect of the paper pulp quality after the guarantee mixes.

The working principle of the embodiment is as follows: under the pumping of the first pulp pump 4, the conveying flow of the thick pulp in the first pipeline 5 is accurately controlled by adjusting the throttle valve 9, then the thick pulp enters the white water barrel 2 and impacts and collides with the white water in the white water barrel 2, so that the purpose of fully mixing the thick pulp and the white water is achieved, then under the conveying action of the second pulp pump 6, the fully mixed pulp leaves the white water barrel 2 through the eccentric conical pipe 8 and enters the screen 3 in front of the wire for the screening process of fiber clusters, and finally, the pulp flows through the head box 10 to form a finished paper web with high longitudinal quantitative uniformity.

The beneficial effects of this embodiment: simple structure, reasonable in design through letting in the inside form of plain boiled water bucket with the pipeline, has realized the purpose of thick paper pulp and plain boiled water intensive mixing, utilizes the frequency conversion control effect of inverter pump and the throttle control effect of being equipped with the choke valve, has realized the purpose of the flow of delivery of accurate control paper pulp, and then has improved the stability of the paper pulp concentration after mixing the dilution to realize improving the purpose of the vertical quantitative homogeneity of finished product paper web.

The foregoing is a more detailed description of the present invention, taken in conjunction with the specific preferred embodiments thereof, and it is not intended that the invention be limited to the specific embodiments shown and described. To the utility model belongs to the technical field of ordinary technical personnel, do not deviate from the utility model discloses under the prerequisite of design, can also make a plurality of simple deductions or replacement, all should regard as belonging to the utility model discloses a protection scope.

Claims

1. The utility model provides a papermaking starching system, its characterized in that, sieve before including sizing pond, white cask and net, the sizing pond with be equipped with first stuff pump between the feed inlet of white cask, the access connection of first stuff pump the sizing pond, the export of first stuff pump with be equipped with first pipeline between the white cask, the export of first stuff pump is connected to the one end of first pipeline, the other end of first pipeline penetrates the inside of white cask and extends to discharge gate one side of white cask, white cask with be equipped with second stuff pump and second pipeline between the sieve before the net, the one end of second pipeline is connected the export of second stuff pump, the other end of second pipeline is connected sieve before the net, the discharge gate of white cask with be equipped with eccentric conical tube between the import of second stuff pump, the one end intercommunication of eccentric conical tube the discharge gate of white cask, the other end of the eccentric conical pipe is communicated with an inlet of the second slurry pump.

2. A papermaking sizing system according to claim 1, wherein both the first pump and the second pump are variable frequency pumps.

3. The papermaking sizing system according to claim 1, wherein an outlet position of the first sizing pump is higher than a feed inlet position of the white water bucket, the first pipeline is vertically arranged between the first sizing pump and the white water bucket, and a throttle valve is arranged on the first pipeline.

4. A papermaking sizing system according to claim 1, wherein the diameter of said eccentric taper pipe is gradually reduced in a direction leading from the discharge port of said white water tub to said second slurry pump.

5. A papermaking sizing system according to claim 1, wherein the vertical distance between the top of the white water bucket and the discharge outlet at the bottom of the white water bucket is greater than 10 m.