CN102619122A

CN102619122A - Upper circulation device of vertical continuous digester

Info

Publication number: CN102619122A
Application number: CN2012101223436A
Authority: CN
Inventors: 万政; 周鲲鹏; 黄百文; 徐应盛; 周万勇; 孙亚军; 吴新华; 樊春华
Original assignee: Hu'nan Juntai Pulp Paper Co Ltd
Current assignee: Hu'nan Juntai Pulp Paper Co Ltd
Priority date: 2012-04-25
Filing date: 2012-04-25
Publication date: 2012-08-01

Abstract

The invention discloses an upper circulation device of a vertical continuous digester. The upper circulation device comprises a sieve plate group constituted by more than one sieve plate and a circular ring-shaped support for supporting the sieve plates, wherein the sieve plates are fixed on the inner circular surface of the support for constituting the sieve plate group, the outer circular surface of the support is fixed on the inner wall of the vertical continuous digester, each sieve plate is of a straight seam sieve plate, an inspection cleaning port is arranged at the lower end of each sieve plate, and each inspection cleaning port is provided with a cover plate which can be detached and mounted. The device can effectively reduce the phenomena that excessively small sheets and wood chips enter into an upper extraction region, improve the mobility of upper circulation, achieve the purpose of preventing blockage, improve slurry quality and yield, save energy, reduce consumption and facilitate shutdown inspection, clearing and maintenance.

Description

Vertical continuous steamer cocycle device

Technical field

The present invention relates to the cooking liquor circulatory system of the vertical continuous steamer in pulp and paper technology field, especially relate to the cocycle device of vertical continuous steamer.

Background technology

What vertical continuous steamer application was maximum in the pulp and paper technology field is Kamyr digester; In the Kamyr digester production process; The input of fibrous raw material and cooking liquor is to carry out at the top of boiling vessel; Paper pulp is discharged by the bottom of boiling vessel; The discharging of waste cooking liquid is to be accomplished by three boiling vessel strainers between boiling vessel top and bottom, three boiling vessel strainers from top to the lower part another name of boiling vessel for cocycle district sieve plate, race way sieve plate, race way sieve plate down.

CN1091792A discloses a kind of method of continuous cooking of pulp; As shown in Figure 1; The method of this continuous cooking of pulp comprise from cocycle district sieve plate, race way sieve plate, following race way sieve plate drawing liquid; The sieve plate drawing liquid can reduce the solid content in the cooking liquor the digestion process from the cocycle district, accelerates the cooking reaction process.

In the prior art, cocycle district sieve plate is the incline direction perforate, sieve plate sieve aperture broad; And percent opening is relatively low, can adapt to the slurrying of external fibrous raw material preferably, but domestic fibrous raw material quality fluctuation is big; In the melting process, small pieces excessively and wood chip content in the wood chip are higher.These cross small pieces and wood chip when getting into vertical continuous steamer cocycle district, through behind the sieve plate easily sedimentation accumulate in sieve plate and separate in the cavity between the still inwall with steaming, result in blockage; And clean inconvenience; The normal normal productive process that influences boiling reduces product quality, improves energy consumption.

Summary of the invention

In order to overcome the defective of prior art, technical problem to be solved by this invention provides a kind of vertical continuous steamer cocycle device, avoids the obstruction of cocycle system, and convenient the cleaning.

In order to solve the problems of the technologies described above; The present invention provides a kind of vertical continuous steamer cocycle device; Its basic technical scheme is: comprise the sieve plate group that constitutes with upper sieve plate by, be used to support the annular stent of said sieve plate, the inner headed face that said sieve plate is fixed on said support constitutes the sieve plate group; The periphery of said support is fixed on the inwall of vertical continuous steamer; Said sieve plate is the vertical masonry joint sieve plate, and the lower end of sieve plate has the inspection Butterworth Hatch, and said inspection Butterworth Hatch is provided with removable cover plate.

Further, the width of the sieve of the sieve plate of vertical continuous steamer cocycle device seam fluid inlet end is less than the width of fluid outlet.

Further, the sieve plate group of vertical continuous steamer cocycle device comprises upper and lower sieve plate group, has spacer region between the said upper and lower sieve plate group.

Further, vertical continuous steamer cocycle device, the suction tube that is connected with upper and lower sieve plate group is respectively equipped with control valve, so that regulate and control the aspiration of suction district, upper and lower sieve plate group place.

The beneficial effect that the present invention brings: sieve plate is the vertical masonry joint sieve; Under the prerequisite that improves sieve-plate aperture ratio; Can reduce the width of sieve seam; Thereby cross small pieces and the wood chip that effectively reduce in the wood chip get into and go up in the extracting district, improve the flowability of intracavity liquid between sieve plate and the vertical continuous steamer inwall, reach to prevent the purpose stopped up; Between sieve plate group and boiling vessel inwall, be provided with the support that is used to support said sieve plate group; Annular stent has a plurality of parallel partition rings; Can improve the flow direction of the intracavity liquid between sieve plate group and the boiling vessel inwall, prevent that low excessively small pieces excessively and the wood chip that brings of local velocity from stopping up, and is provided with inspection Butterworth Hatch and cover plate in the lower end of sieve plate; Inspection Butterworth Hatch cover plate disassemble and assemble work amount is little, can make things convenient for shutdown inspection and cleaning maintenance.

Description of drawings

Below in conjunction with the accompanying drawing and the specific embodiment content of the present invention is done further explain:

Fig. 1 is the vertical continuous steamer loop structure of a prior art sketch map;

Fig. 2 is an embodiment sieve plate master TV structure sketch map;

Fig. 3 looks up structural representation for Fig. 2 embodiment sieve plate;

Fig. 4 is that the A-A of Fig. 3 is to structural representation;

Fig. 5 is that the B of Fig. 3 is to structural representation.

The specific embodiment

Vertical continuous steamer cocycle device of the present invention comprises upper and lower sieve plate group; Have spacer region between the upper and lower sieve plate group, form two suction districts, what need explanation is; The cocycle device also can have only a sieve plate group or two with the upper sieve plate group, correspondingly is one or two above suction districts.Cocycle device provided by the invention is respectively equipped with control valve at the suction tube that is connected with upper and lower sieve plate group, so that regulate and control the aspiration of upper and lower two suction districts; Upper and lower sieve plate group all has sieve plate 1 more than one, is used for the annular stent 4 of supporting screening plate group, and like Fig. 2-shown in Figure 5, sieve plate 1 is the vertical masonry joint sieve plate; The width of sieve seam 2 fluid inlet ends is less than the width of fluid outlet, and sieve plate is the vertical masonry joint sieve, can improve the percent opening of sieve plate 20%; And can reduce the width of sieve seam 2, thereby cross small pieces and the wood chip that effectively reduce in the wood chip get into and go up in the extracting district, improve the drawing liquid amount; The width of sieve seam 2 fluid inlet ends is less than the width of fluid outlet; After having served as small pieces and wood chip and getting into sieve seam 2, can reduce the probability that small pieces and wood chip stop up in sieve seam 2, and reach and prevent the purpose stopped up; Annular stent 4 has a plurality of parallel annulus beams; The inner headed face that the polylith sieve plate is fixed on the annulus beam of annular stent 4 constitutes the sieve plate group; The periphery of the annulus beam of support 4 is fixed on the inwall of vertical continuous steamer; A plurality of parallel annulus beams have cutting function simultaneously, and the cavity between sieve plate group and the vertical continuous steamer inwall is divided into several districts, can improve the flow direction of the intracavity liquid between sieve plate group and the boiling vessel inwall; Prevent that localized liquid from remaining in a standstill or flow velocity low excessively bring cross small pieces and wood chip stops up, reach to prevent the purpose stopped up; The lower end of sieve plate 1 has inspection Butterworth Hatch 3, and inspection Butterworth Hatch 3 is provided with removable cover plate, and cover plate will check that Butterworth Hatch 3 covers during ordinary production, and maintenance is checked and cleared up to removable lower cover when inspection is cleaned to runner.

In the course of work, can be through regulating the control valve of going up on the extraction tube, to regulate the extracting amount of the upper and lower sieve plate of extracting; Reduce extracting pressure reduction, reduce tiny wood chip and get in the screen frame, improve the uniformity that flow distributes in the boiling vessel with extract; Improve the uniformity of boiling slurry; Reduce slag slurry rate, improve stock quality and yield rate, energy-saving and cost-reducing.

The above is merely the preferred embodiments of the present invention, and does not limit the present invention in any way, and for a person skilled in the art, the present invention can have various changes and variation.All within spirit of the present invention and principle, any modification of being done, be equal to replacement, improvement etc., all should be included within protection scope of the present invention.

Claims

1. vertical continuous steamer cocycle device; Comprise the sieve plate group that constitutes with upper sieve plate by, it is characterized in that: also comprise the annular stent that is used to support said sieve plate, the inner headed face that said sieve plate is fixed on said support constitutes the sieve plate group; The periphery of said support is fixed on the inwall of vertical continuous steamer; Said sieve plate is the vertical masonry joint sieve plate, and the lower end of sieve plate has the inspection Butterworth Hatch, and said inspection Butterworth Hatch is provided with removable cover plate.

2. vertical continuous steamer cocycle device according to claim 1 is characterized in that: the width of the sieve seam fluid inlet end of said sieve plate is less than the width of fluid outlet.

3. vertical continuous steamer cocycle device according to claim 1, it is characterized in that: said sieve plate group comprises upper and lower sieve plate group, has spacer region between the said upper and lower sieve plate group.

4. vertical continuous steamer cocycle device according to claim 3, it is characterized in that: the suction tube that is connected with upper and lower sieve plate group is respectively equipped with control valve, so that regulate and control the aspiration of suction district, upper and lower sieve plate group place.