CN103669076A

CN103669076A - Efficient pulp and water mixing device

Info

Publication number: CN103669076A
Application number: CN201310715087.6A
Authority: CN
Inventors: 刘水平; 余红涛; 徐广晋; 刘建平; 吕正峰; 许江虹
Original assignee: Yunnan Zhongyan Kunchuan Ruisheng Technology Co Ltd
Current assignee: Yunnan Zhongyan Kunchuan Ruisheng Technology Co Ltd
Priority date: 2013-12-23
Filing date: 2013-12-23
Publication date: 2014-03-26

Abstract

Provided is an efficient pulp and water mixing device. The efficient pulp and water mixing device comprises pulp and water mixing bodies (3) with mixing cavities (5), dilution water injection pipes (6), pulp pipe bundles (4) and turbulence pipes (1), wherein the dilution water injection pipes (6) are longitudinally led into the mixing cavities (5), the pulp pipe bundles (4) transversely penetrate through the mixing cavities (5), the turbulence pipes (1) and the pipe bundles (4) are connected, the turbulence pipes (1) are arranged in a concentric mode, turbulence pipe openings in the positions, connected with the pipe bundles, of the turbulence pipes are tapered openings (4-1) or cylindrical holes, the caliber of each tapered opening or each cylindrical hole is 1-4mm larger than the outer diameter of each pipe bundle, and annular gaps (2) are formed at the position of connection between the turbulence pipes and the pipe bundles. According to the efficient pulp and water mixing device, pulp and water in a flowing pulp box can be efficiently mixed, the pulp can be transversely and evenly distributed, and qualified paper can be made.

Description

Efficient pulp-water mixing arrangement

Technical field

The invention belongs to pulp-water mixing arrangement technical field of structures, especially papermaking-method reconstituted tobaccos in head box and produce the pulp-water mixing arrangement of head box used.

Background technology

In papermaking-method reconstituted tobaccos production technology, head box is dispersed for the mixing material that the liquid such as paper making pulp or other fibers and water are mixed, and homodisperse slurry is arranged on screen pack.Slurry is when cross direction profiles, because a variety of causes causes horizontal skewness, especially when slurry flow at high speed, fluid flow direction is consistent, often cause dilution water and the slurry in each district to mix inhomogeneous, produce paper road, the cross direction profiles paper weight even, unit are that does not reach the desired paper of finished paper is consistent, and laterally the grammes per square metre error of paper is little.

Summary of the invention

The deficiency that object of the present invention exists in order to solve prior art just, provides a kind of slurry and water in head box is efficiently mixed, and slurry is can cross direction profiles even, thereby prepares the efficient pulp-water mixing arrangement of qualified paper product.

Object of the present invention is achieved through the following technical solutions.

Efficient pulp-water mixing arrangement, this device includes pulp-water mixture with mixing chamber, longitudinally pass into the dilution water ascending pipe of mixing chamber, be horizontally through mixing chamber slurry tube bank, with the turbulent pipe of the concentric of tube bank handing-over; Turbulent pipe is bell or cylindrical hole with the turbulent flow mouth of pipe of tube bank junction, and the large 1 ~ 4mm. of aperture ratio tube bank external diameter of bell or cylindrical hole, in turbulent pipe and tube bank formation annulus, junction.

Turbulent pipe of the present invention inside is at least two-stage pipeline section that caliber outwards increases step by step.This device is along being laterally divided into several districts, and each district has included mixing chamber, dilution water ascending pipe, tube bank, turbulent pipe.The tube bank of each subregion includes 2 ~ 12 pipes, and turbulent pipe quantity is also 2 ~ 12.

The present invention can make paper making pulp in head box fully mix with plain boiled water, produces uniform fluid slurry, prepares qualified paper product.And the concentration of adjustable each zoned slurry, thereby control the slurry oven-dry weight at each position.

Accompanying drawing explanation

Fig. 1 is the schematic diagram of an embodiment of the present invention;

Fig. 2 is the A-A profile of Fig. 1;

Fig. 3 is the schematic diagram of the another kind of embodiment of the present invention;

Fig. 4 is the B-B profile of Fig. 3;

Fig. 5 is the partial enlarged drawing at label 2 places;

Fig. 6 is the structural representation of turbulent pipe.

The specific embodiment

As shown in Fig. 1 ~ Fig. 5, this efficient pulp-water mixing arrangement includes pulp-water mixture 3 with mixing chamber 5, longitudinally pass into the dilution water ascending pipe 6 of mixing chamber 5, be horizontally through mixing chamber 5 slurry tube bank 4, with the turbulent pipe 1 of the concentrics of tube bank 4 handing-over; Turbulent pipe is bell 4-1 or cylindrical hole with the turbulent flow mouth of pipe of tube bank junction, and the large 1 ~ 4mm. of aperture ratio tube bank external diameter of bell or cylindrical hole, in turbulent pipe and tube bank formation annulus, junction 2.Tube bank is embedded in mixing chamber chamber wall, must not reveal.Turbulent pipe and the welding of mixing chamber chamber wall, do not reveal.Mixing chamber inwall and pipe inside and outside wall are through polishing, not hanging wire.Tube bank can adopt round stainless steel tube to make, and corrosion resistant, exports round and smooth.Turbulent pipe 1 adopts stainless steel to make, and as shown in Figure 6, turbulent pipe inside is at least two-stage pipeline section that caliber outwards increases step by step along pulp direction, and caliber ladder increases or to exit, becomes rectangular tube gradually by pipe.

In order to improve the horizontal quantification of mixing arrangement, distribute, device lateral can be divided into several districts, quantitative for different slurries, by stages is apart from different.Each district has included mixing chamber 5, dilution water ascending pipe 6, tube bank 4, turbulent pipe 1, and the tube bank of each subregion includes 2 ~ 12 pipes, and turbulent pipe quantity is also 2 ~ 12.Shown in Fig. 1 and 2, be that each partition arrangement has three row two row six roots of sensation tube bank and six roots of sensation turbulent pipe altogether.Shown in Fig. 3 and Fig. 4, be that each partition arrangement has two row two row totally four tube banks and turbulent pipe.Tube bank and the turbulent pipe quantity of larger each subregion of flow are more, otherwise fewer.The mixing chamber of each subregion is round and smooth inwall, prevents hanging and forms dead band.

Turbulent pipe 1 is concentric tube groups with tube bank 4, directly enters turbulent pipe, because the aperture ratio tube bank external diameter of turbulent pipe bell or cylindrical hole is large, in turbulent pipe and tube bank formation annulus, junction from restraining the 4 slurry streams that spray at a high speed.Due to high velocity slurry stream swabbing action, in annulus, place forms negative pressure, and plain boiled water can enter in turbulent pipe by annulus under negative pressure, and annular dilution water is wrapped in slurry stream and flows in turbulent pipe, and in flow process, plain boiled water constantly mixes with slurry.When slurry and dilution water flow in turbulent pipe, the first order pipeline section aperture of turbulent pipe is minimum, and now fluid-flow rate is maximum, and fluid is in turbulent.While entering first order pipeline section, because pipeline section aperture ratio first order pipeline section aperture, the second level increases, after fluid enters second level pipeline section, flow velocity reduces, and forms the micro-whirlpool of fluid at ladder place, and segment fluid flow flow direction changes, and produces the power disperseing; In like manner, after fluid enters third level pipeline section, flow velocity further reduces, and further produces disperse power.Internal fluid fiber obtains energy dispersive, is disperseed preferably, and plain boiled water fully mixes with slurry.

Because mixing chamber space is larger, chamber words spoken by an actor from offstage water pressure is lower, and in chamber, the plain boiled water pressure at each apopore place is basically identical, can guarantee that the plain boiled water amount that each tube bank and turbulent pipe suck is more or less the same.By adjusting the concentration of the slurry stream of each subregion, just can change the quantitative of each subregion, thereby adjust the uniformity of horizontal quantification.If the latter end pipe of turbulent pipe adopts circle to be deformed into gradually rectangular tube, slurry is due to tubular change in pipe, and fluid is staggered to be mixed, and during outlet, slurry fully mixes, slurry stream forms the rectangle fluid requiring in addition, and rectangle fluid ratio Pipe Flow body section flow velocity is more even.

This device, by siphonage, evenly mixes dilution water with slurry.By regulating the inlet of different mixed zones dilution water, can change the not concentration of same district fluid slurry, thereby regulate as requested the dilution water at each position just can change the oven-dry weight of the slurry in each district.

Claims

1. efficient pulp-water mixing arrangement, it is characterized in that, this device include band mixing chamber (5) pulp-water mixture (3), longitudinally pass into mixing chamber (5) dilution water ascending pipe (6), be horizontally through mixing chamber (5) slurry tube bank (4), with the turbulent pipe (1) of the concentric of tube bank (4) handing-over; Turbulent pipe is bell (4-1) or cylindrical hole with the turbulent flow mouth of pipe of tube bank junction, and the large 1 ~ 4mm. of aperture ratio tube bank external diameter of bell or cylindrical hole, in turbulent pipe and tube bank formation annulus, junction (2).

2. efficient pulp-water mixing arrangement according to claim 1, is characterized in that, described turbulent pipe (1) inside is at least two-stage pipeline section that caliber outwards increases step by step.

3. efficient pulp-water mixing arrangement according to claim 1 and 2, is characterized in that, this device is along being laterally divided into several districts, and each district has included mixing chamber (5), dilution water ascending pipe (6), tube bank (4), turbulent pipe (1).

4. efficient pulp-water mixing arrangement according to claim 3, is characterized in that, the tube bank of each subregion (4) includes 2 ~ 12 pipes, and turbulent pipe quantity is also 2 ~ 12.