CN211864073U

CN211864073U - White water filter

Info

Publication number: CN211864073U
Application number: CN202020342313.6U
Authority: CN
Inventors: 刘晓明; 马乐凡; 刘华夏
Original assignee: Changsha University of Science and Technology
Current assignee: Changsha University of Science and Technology
Priority date: 2020-03-18
Filing date: 2020-03-18
Publication date: 2020-11-06
Anticipated expiration: 2030-03-18

Abstract

A white water filter comprises a tank body (1), a white water inlet (2) and an oxygen aeration head inlet (3) which are arranged at the upper part of the tank body (1), a pulp residue collecting region (4) which is arranged at the bottom of the tank body (1), at least one set of filter pipe (5) of which the two ends are respectively connected with the upper end and the lower end of the tank body (1), a back washing water pipe (6) communicated with the upper end of the filter pipe (5), a water outlet pipe (7) communicated with the lower end of the filter pipe (5), a pulp residue pipe (8) communicated with the pulp residue collecting region (4), a return pipe (9) of which the upper end is communicated with the upper part of the tank body (1) and the lower end is communicated with the pulp residue pipe (8).

Description

White water filter

Technical Field

The utility model belongs to the technical field of pulping and papermaking technique and specifically relates to a white water filter for carrying out filterable to papermaking white water is related to.

Background

The papermaking white water refers to the drainage of pulp concentration, sheet formation, squeezing and vacuum systems in the pulping and papermaking production process, and contains a large amount of suspended substances such as fine fibers, fillers, chemicals, stickies and the like, as well as colloidal substances and soluble substances. The water and the water discharge amount in the pulping and papermaking process are large, and if the white water treatment and recycling process is improper, the environment is polluted, and the waste of water resources and papermaking raw and auxiliary materials is brought.

The clean production is the inevitable trend of the sustainable development of the paper industry, and the recycling of the water for the paper industry is an important clean production way. The 'discharge standard of water pollutants for pulping and papermaking industry' published by the national environmental protection department plays a positive promoting role in the development of the process. The national standard GB 3544-2008 improves the discharge requirement of waste water, and the new discharge standard further strictly controls the discharge amount of water for papermaking. Therefore, the closed cycle recycling of the papermaking wastewater becomes a development trend of the papermaking industry.

Common white water treatment equipment comprises a multi-disc vacuum filter, an air floatation method white water treatment equipment and the like. The former has the advantages of high fiber recovery rate, good white water purification effect and large processing capacity; the defects of the method are that the equipment is complex, the maintenance amount is large, and the manufacturing cost is high, so the method is difficult to popularize and apply in small and medium-sized paper mills. The air floatation method white water treatment equipment is popularized and applied in domestic small and medium-sized paper mills, but has the defects of large floor area, high power consumption and the like. The white water filtering devices such as a white water multi-disc filter and an inclined screen can only recover fiber materials in white water, the filtered white water contains colloidal substances and the like, the application range of the white water is limited, the white water is mainly used for supplementing water for slurry and the like, the reuse rate of the white water is low, and the pollution discharge load is still high.

SUMMERY OF THE UTILITY MODEL

The utility model aims to solve the technical problem how to provide a can improve the plain boiled water filter of papermaking retrieval and utilization plain boiled water quality, reach from more materials of papermaking plain boiled water retrieval and utilization, improve the rate of utilization of papermaking plain boiled water, reduce the purpose of blowdown load.

In order to solve the technical problem, the utility model provides a plain boiled water filter, including a jar body, set up the plain boiled water entry and the oxygenation aeration head entry on jar body upper portion set up the thick liquid sediment collecting region of jar body bottom, at least one set of both ends respectively with the filter tube of two upper and lower end connections of jar body, with the back flush water pipe of filter tube upper end intercommunication, with the outlet pipe of filter tube lower extreme intercommunication, with the thick liquid sediment pipe of thick liquid sediment collecting region intercommunication, the upper end with jar body upper portion intercommunication, the lower extreme with the back flow of thick liquid sediment pipe intercommunication.

As the utility model discloses an improve technical scheme, the utility model provides a plain boiled water filter, the filter tube includes the stay tube, and the cover is in filter ring and ceramic filter ring are crossed to the fibre on the stay tube surface, filter ring and ceramic filter ring staggered arrangement are crossed to the fibre, the stay tube has the filtrate hole that accesss to the stay tube inner chamber with the contact site of filter ring and ceramic filter ring.

On the basis of above-mentioned improvement scheme, as the utility model discloses an improve technical scheme, the utility model provides a plain boiled water filter still has the cover on the surface of stay tube, near the first clamping ring of fibre filtration ring and ceramic filter ring group upper end, near the second clamping ring of fibre filtration ring and ceramic filter ring group lower extreme, the cover is in on the surface of stay tube, be located the compression spring between the first clamping ring and the jar body.

As the improved technical proposal of the utility model, the utility model provides a plain boiled water filter still has the setting and is in first valve or/and water pump on the outlet pipe set up second valve or/and stuff pump on the thick liquid sediment pipe.

As the technical scheme of the improvement of the utility model, the utility model provides a plain boiled water filter still has the setting and is in the clearance hole of jar body lower part.

The foregoing improvements can be practiced alone or in combination without conflict.

The utility model provides a technical scheme, papermaking plain boiled water passes through the filter tube and filters the back, and tiny fiber, filler, colloidal substance etc. in the plain boiled water get into thick liquid sediment collecting region, from thick liquid sediment bank of tubes discharge, the clear water that obtains after filtering can be used to replace partial clear water to use, has improved the rate of recovery of papermaking plain boiled water, has reached from more materials of papermaking plain boiled water in retrieval and utilization, improves the rate of recovery of papermaking plain boiled water, reduces the purpose of blowdown load. The tank body is of a closed structure, pressure filtration can be adopted, the filtration efficiency is improved, and the floor area of equipment is reduced.

Drawings

The accompanying drawings are included to provide a further understanding of the invention, and are incorporated in and constitute a part of this application, illustrating embodiments of the invention and description thereof for the purpose of explanation and are not intended to constitute an undue limitation on the invention. In the drawings:

fig. 1 is a schematic view of the structure of a white water filter according to an embodiment;

fig. 2 is a schematic top view of a white water filter according to an embodiment;

FIG. 3 is a schematic view of the structure of FIG. 1 along line A-A;

fig. 4 is a schematic cross-sectional view of a filter tube of the white water filter according to the embodiment;

FIG. 5 is a schematic cross-sectional view of a support tube of the white water filter according to an embodiment;

fig. 6 is a schematic top view of a support tube of the white water filter according to the embodiment;

fig. 7 is a schematic top view of a ceramic filter ring of the white water filter of an embodiment;

FIG. 8 is a schematic view of the B-B direction structure of FIG. 7;

fig. 9 is a schematic top view of a fibrous filter ring of the white water filter of an embodiment;

fig. 10 is a schematic view of the C-C structure of fig. 9.

Detailed Description

The present invention will be further explained with reference to the accompanying drawings.

The white water filter shown in fig. 1 to 3 comprises a tank body 1, a white water inlet 2 and an oxygen aeration head inlet 3 arranged at the upper part of the tank body 1, a pulp residue collecting region 4 arranged at the bottom of the tank body 1, at least one set of filter pipes 5 with two ends respectively connected with the upper end and the lower end of the tank body 1, a back flush water pipe 6 communicated with the upper end of the filter pipe 5, a water outlet pipe 7 communicated with the lower end of the filter pipe 5, a pulp residue pipe 8 communicated with the pulp residue collecting region 4, and a return pipe 9 with an upper end communicated with the upper part of the tank body 1 and a lower end communicated with the pulp residue pipe 8.

The working principle is as follows: white water for papermaking is input into the tank body 1 through the white water inlet 2, the filtering pipe 5 filters the white water, and fine fibers, fillers, colloids and the like in the white water enter the pulp residue collecting area 4 and are discharged from the pulp residue pipe 8, so that the pulp residue can be recycled. The clear water obtained after the white water is filtered by the filter tube 5 is reused in the production process through the water outlet tube 7, and can be used instead of clear water, so that the reuse rate of the white water for papermaking is improved, more materials are reused from the white water for papermaking, the reuse rate of the white water for papermaking is improved, and the aims of reducing pollution discharge load are fulfilled. The tank body 1 is of a closed structure, can adopt pressure filtration, improves the filtration efficiency and reduces the occupied area of equipment.

The return pipe 9 is arranged, on one hand, when the level of the white water in the tank body 1 is higher, the white water can overflow into the production system through the return pipe 9, and on the other hand, when the concentration of the slurry collected in the slurry-residue collecting region 4 is lower or abnormal state occurs in the use of the slurry residue, the white water can enter the tank body 1 through the pumping to circulate. In addition, the return pipe 9 can also be used for back washing, and is used for adding medicines such as biological enzyme and the like into the tank body 1 after being communicated with a medicine adding system, so that the production process is optimized. The oxygen aeration head is inserted from the inlet 3 of the oxygen aeration head, and oxygen is added into the tank body 1, so that the growth and development of anaerobic bacteria can be inhibited, and the generation of odor can be inhibited.

As an embodiment, as shown in fig. 4 to 10 (in conjunction with fig. 1), the white water filter provided by the present invention, the filtering pipe 5 includes a supporting pipe 10, a fiber filtering ring 11 and a ceramic filtering ring 12 sleeved on the outer surface of the supporting pipe 10, the fiber filtering ring 11 and the ceramic filtering ring 12 are arranged alternately, and the contacting portion of the supporting pipe 10 with the fiber filtering ring 11 and the ceramic filtering ring 12 has a filtrate hole leading to the inner cavity of the supporting pipe 10. And the device also comprises a first press ring 13 which is sleeved on the outer surface of the support tube 10 and is close to the upper ends of the fiber filtering ring 11 and the ceramic filtering ring 12 group, a second press ring 14 which is close to the lower ends of the fiber filtering ring 11 and the ceramic filtering ring 12 group, and a compression spring 15 which is sleeved on the outer surface of the support tube 10 and is positioned between the first press ring 13 and the tank body 1.

Referring to fig. 3, the second press ring 14 is disposed on the bracket connected to the tank 1, and the compression spring 15 applies an elastic force to the first press ring 13, so that the fiber filter ring 11 and the ceramic filter ring 12 are in a compressed state during use, thereby preventing a gap from occurring between the fiber filter ring 11 and the ceramic filter ring 12, and preventing white water from directly supporting the pipe 10 and contaminating filtrate.

As an embodiment, as shown in fig. 1, the white water filter provided by the present invention further has a first valve or/and a water pump 16 disposed on the water outlet pipe 7, and a second valve or/and a slurry pump 17 disposed on the slurry pipe 8.

As an embodiment, as shown in fig. 1, the white water filter of the present invention further includes a cleaning hole 18 disposed at a lower portion of the tank 1. And the device can be used for entering and exiting personnel and materials during maintenance.

Various modifications and changes may occur to those skilled in the art. Any modification, equivalent replacement, improvement and the like made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. The white water filter is characterized by comprising a tank body (1), a white water inlet (2) and an oxygen aeration head inlet (3) which are arranged at the upper part of the tank body (1), a pulp residue collecting area (4) which is arranged at the bottom of the tank body (1), at least one set of filter pipe (5) of which the two ends are respectively connected with the upper end and the lower end of the tank body (1), a back washing water pipe (6) communicated with the upper end of the filter pipe (5), a water outlet pipe (7) communicated with the lower end of the filter pipe (5), a pulp residue pipe (8) communicated with the pulp residue collecting area (4), a return pipe (9) of which the upper end is communicated with the upper part of the tank body (1) and the lower end is communicated with the pulp residue pipe (8).

2. The white water filter according to claim 1, wherein the filtering pipe (5) comprises a support pipe (10), and a fiber filtering ring (11) and a ceramic filtering ring (12) which are sleeved on the outer surface of the support pipe (10), the fiber filtering ring (11) and the ceramic filtering ring (12) are arranged in a staggered manner, and the contact part of the support pipe (10) with the fiber filtering ring (11) and the ceramic filtering ring (12) is provided with a filtrate hole which leads to the inner cavity of the support pipe (10).

3. The white water filter according to claim 2, further comprising a first press ring (13) fitted over the outer surface of the support tube (10) and abutting against the upper end of the group of fiber filter rings (11) and ceramic filter rings (12), a second press ring (14) abutting against the lower end of the group of fiber filter rings (11) and ceramic filter rings (12), and a compression spring (15) fitted over the outer surface of the support tube (10) and located between the first press ring (13) and the vessel (1).

4. The white water filter according to claim 1, further comprising a first valve and/or a water pump (16) disposed on the water outlet pipe (7), and a second valve and/or a slurry pump (17) disposed on the slurry pipe (8).

5. The white water filter according to claim 1, further having a cleaning hole (18) provided at a lower portion of the tank (1).