CN210683384U

CN210683384U - Water cyclic utilization system of papermaking processing

Info

Publication number: CN210683384U
Application number: CN201921366163.6U
Authority: CN
Inventors: 李国红; 刘军永; 史彦坤; 赵亮
Original assignee: Shijiazhuang Kepin Paper Factory
Current assignee: Shijiazhuang Kepin Paper Factory
Priority date: 2019-08-21
Filing date: 2019-08-21
Publication date: 2020-06-05
Anticipated expiration: 2029-08-21

Abstract

The utility model relates to the technical field of papermaking, in particular to a water recycling system for papermaking, which comprises a plurality of vertical settling tanks and a liquid inlet header pipe, wherein the input end of the liquid inlet header pipe is connected with a blow-off pipe of a beater; the settling tank sequentially comprises a primary settling chamber, a secondary settling chamber and a tertiary settling chamber from top to bottom, wherein the primary settling chamber, the secondary settling chamber and the tertiary settling chamber are communicated with each other; the primary settling chamber is connected with a primary liquid discharge pipe, the primary liquid discharge pipe is connected with a squeezing and dewatering part of a paper machine, the top end of the primary settling chamber is connected with a liquid inlet pipe, and the input end of the liquid inlet pipe is connected with the output end of a liquid inlet header pipe; the secondary settling chamber is connected with a secondary liquid discharge pipe, and the secondary liquid discharge pipe is connected with a net part of a paper machine; the third-stage settling chamber is connected with a third-stage liquid discharge pipe, and the third-stage liquid discharge pipe is connected with the pulping machine; the waste water in the pulping machine can be recycled in the paper machine and the pulping machine, so that the recycling of water resources is realized, and the method has the advantages of saving resources and reducing the discharge amount of the waste water.

Description

Water cyclic utilization system of papermaking processing

Technical Field

The utility model relates to a technical field of papermaking processing, concretely relates to water cyclic utilization system of papermaking processing.

Background

In the process of making paper by using waste paper such as waste newspaper, corrugated paper and the like, waste paper materials are required to be soaked, smashed and stirred to be made into slurry, and a large amount of paper-making waste water is generated in the process; the partial waste water contains partial fiber and pulp, which is directly discharged to pollute the environment and waste resources.

In the industrial production of paper, a large amount of water is added to the beater during beating. Diluting the pulp output by the pulping machine to a proper concentration after treatment, sending the pulp into a paper machine, and preliminarily dehydrating the pulp in a paper mesh part of the paper machine to form wet paper sheets; and squeezing and dehydrating by using wet paper felt, and drying to form the paper. The net part of the paper machine needs to be wetted by spray water in the using process, the net part needs to be regularly sprayed and cleaned after the use is finished, and the spray water is needed in both the two processes of the net part; wet paper felts also require wet wetting of the felt with shower water during use.

At present, when water resources are increasingly lacking, how to recycle a large amount of papermaking wastewater generated in the pulping process to the net part of a papermaking machine, the press dewatering part of a paper felt and a pulping machine is to be recycled, so that the problems of large water consumption and large wastewater discharge in the papermaking process are urgently solved.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a water cyclic utilization system of papermaking processing can realize the cyclic utilization of water resource with cyclic utilization in paper machine and beating machine behind the waste water recovery in the beating machine, has resources are saved, reduces the advantage of waste water discharge.

The purpose of the utility model is realized through the following technical scheme:

a water recycling system for papermaking processing comprises a plurality of vertical settling tanks and a liquid inlet main pipe, wherein the input end of the liquid inlet main pipe is connected with a drain pipe of a beating machine; the settling tank sequentially comprises a primary settling chamber, a secondary settling chamber and a tertiary settling chamber from top to bottom, wherein the primary settling chamber, the secondary settling chamber and the tertiary settling chamber are communicated with each other; the primary settling chamber is connected with a primary liquid discharge pipe, the primary liquid discharge pipe is connected with a squeezing and dewatering part of a paper machine, the top end of the primary settling chamber is connected with a liquid inlet pipe, and the input end of the liquid inlet pipe is connected with the output end of a liquid inlet header pipe; the secondary settling chamber is connected with a secondary liquid discharge pipe, and the secondary liquid discharge pipe is connected with a net part of a paper machine; and the third-stage settling chamber is connected with a third-stage liquid discharge pipe, and the third-stage liquid discharge pipe is connected with the pulping machine.

By adopting the technical scheme, the wastewater discharged from the beater is discharged from the blow-off pipe, is sent into the plurality of liquid inlet pipes through the liquid inlet main pipe, and then flows into the settling tank to be settled step by step under the action of self weight; the water in the primary settling chamber is clear water, the fiber and the pulp contained in the clear water are few, and the clear water is sent to a squeezing dewatering part through a primary liquid discharge pipe to soak and spray-wash wet coarse cotton cloth; the water in the secondary settling chamber contains fibers, and the fibers are conveyed to the net part through a secondary liquid discharge pipe to spray the paper net blanket; the waste water in the third-stage settling chamber is thick and contains more slurry, and the waste water is sent into the pulping machine through the third-stage liquid discharge pipe for recycling. Therefore, the waste water in the pulping machine is recycled to the pulping machine and the paper machine after natural precipitation, and the problems of large water consumption and large waste water discharge in the paper making process are solved.

Preferably, the first-stage liquid discharge pipe, the second-stage liquid discharge pipe and the third-stage liquid discharge pipe are all provided with liquid valves.

By adopting the technical scheme, one settling tank or a plurality of settling tanks are selectively opened according to the water demand of the beating machine and the paper machine. The water discharge can be controlled through the liquid valve, so that the water discharge can be matched with the water flow speed and the water flow entering the settling tank, the wastewater can be completely precipitated as far as possible, and the specification of the discharged water in each level of liquid discharge pipes can meet the requirements.

Preferably, the system further comprises a primary main pipe, the output ends of the primary liquid discharge pipes of the settling tanks are connected with the primary main pipe, and the primary main pipe is connected with the press dewatering part.

Preferably, the output end of the primary main pipe is connected with a plurality of primary branched pipes, the output ends of the primary branched pipes are connected with the squeezing and dewatering part, and the primary branched pipes are provided with liquid valves.

By adopting the technical scheme, clear water discharged by the primary liquid discharge pipes of the settling tanks is collected by the primary main pipe, and after the clear water passes through the partial area of the plant, the clear water is directly sent into the squeezing dewatering part through the primary branch pipes, so that the arrangement of excessive pipelines in the plant can be avoided. Through the liquid valve on the first-level branch pipe, the water supply spray can be carried out on the paper coarse cloth of the paper machine squeezing dewatering part needing water supply according to the actual processing condition.

Preferably, the output end of the primary branched pipe is detachably provided with a filter disc.

Through adopting above-mentioned technical scheme, a small amount of fibre or thick liquids that exist in can the separation clear water are set up to the cassette, avoid polluting paper coarse cotton cloth.

Preferably, the output end of the primary branched pipe is integrally connected with a flange plate, one end of the flange plate, which is far away from the primary branched pipe, is provided with a slot, and the periphery of the filter disc is integrally connected with an insert block which is inserted into the slot in a matching manner.

By adopting the technical scheme, the primary branch pipe is connected with the water pipe of the squeezing dewatering part through the flange plate, when the filter disc is arranged in the primary branch pipe, the inserting block is inserted into the inserting groove, and the two flange plates are connected through the bolt after being butted. The filter disc can be detachably mounted and can be periodically detached for cleaning or replacement.

Preferably, the system further comprises a secondary main pipe, the output ends of the secondary liquid discharge pipes of the settling tanks are connected with the secondary main pipe, and the output end of the secondary main pipe is connected with the net part.

Preferably, the output end of the secondary main pipe is connected with a plurality of secondary branch pipes, the output ends of the secondary branch pipes are connected with the net part, and the secondary branch pipes are provided with liquid valves.

By adopting the technical scheme, the fiber-containing water discharged by the secondary liquid discharge pipes of the settling tanks is collected by the secondary main pipe, passes through partial areas of a plant and is directly sent to the net part through the secondary branch pipes, and the arrangement of excessive pipelines in the plant can be avoided. Through the liquid valve on the secondary branch pipe, the paper web blanket of the paper machine wire part needing water supply can be supplied with water and sprayed according to the actual processing condition.

Preferably, the system further comprises a third-level main pipe, the output ends of the third-level liquid discharge pipes of the settling tanks are connected with the third-level main pipe, and the output ends of the third-level main pipe extend into the pulping machine.

By adopting the technical scheme, the slurry-containing water discharged by the three-level liquid discharge pipes of the settling tanks is collected by the three-level main pipe, passes through partial areas of a plant and is sent into the pulping machine, so that the arrangement of excessive pipelines in the plant can be avoided, and the water supply to the pulping machine is realized.

Preferably, the three-stage main pipe is provided with a liquid valve and a water pump.

Through adopting above-mentioned technical scheme, through liquid valve and water pump, can open liquid valve and water pump according to actual processing conditions, will contain during the thick liquid squeezes into the beating machine, realize containing the recycle of thick liquid.

To sum up, the utility model discloses following beneficial effect has:

(1) the wastewater generated by the pulping machine is naturally settled through a plurality of settling tanks and then is sent into the pulping machine and the paper machine in a grading manner for recycling, so that the resources are saved, and the wastewater discharge is reduced;

(2) the arrangement of the primary main pipe, the secondary main pipe and the tertiary main pipe can relatively simplify the arrangement of pipelines in a factory, and save the installation and maintenance cost;

(3) the filter sheet is arranged to filter the water fed into the paper wool cloth, so that the paper wool cloth is prevented from being polluted due to the doping of too many fibers and paper pulp, and the water consumption for cleaning the paper wool cloth can be relatively reduced.

Drawings

Fig. 1 is a schematic view of the overall structure of the present invention;

fig. 2 is a schematic structural view of another aspect of the present invention;

FIG. 3 is a schematic view of a filter installed in a first-stage manifold;

fig. 4 is a schematic structural view showing a state where the filter sheet is removed from the primary branched pipe.

Reference numerals: 1. a settling tank; 2. beating machine; 21. a blow-off pipe; 25. a water pump; 3. a paper machine; 4. a liquid inlet header pipe; 41. a liquid inlet pipe; 51. a primary liquid discharge pipe; 52. a primary header pipe; 53. first-stage pipe separation; 61. a secondary liquid discharge pipe; 62. a secondary header pipe; 63. secondary pipe distribution; 71. a third-stage liquid discharge pipe; 72. a tertiary header pipe; 8. a flange plate; 81. inserting a block; 82. a filter disc; 83. a slot; 9. a liquid valve; 10. a water pipe; 11. a primary settling chamber; 12. a secondary settling chamber; 13. and a third-stage settling chamber.

Detailed Description

The present invention will be further described with reference to the following specific embodiments.

As shown in fig. 1, the utility model discloses a water recycling system for papermaking for after the waste water of beating machine 2 exhaust subsides naturally, cyclic utilization to beating machine 2 and two paper machines 3 in. The utility model discloses a two vertical settling casks 1 and feed liquor house steward 4, the input of feed liquor house steward 4 is connected with beating machine 2's blow off pipe 21, and the output of feed liquor house steward 4 is connected with two feed liquor pipes 41, installs liquid valve 9 on the feed liquor house steward 4. In order to lead the wastewater in the sewage draining pipe 21 to the higher settling tank 1 smoothly, a water pump 25 is arranged on the sewage draining pipe 21. The settling tank 1 sequentially comprises a primary settling chamber 11, a secondary settling chamber 12 and a tertiary settling chamber 13 which are communicated with each other from top to bottom, and the output end of the liquid inlet pipe 41 is connected to the top end of the primary settling chamber 11, so that the wastewater in the pulping machine 2 is discharged into the settling tank 1.

As shown in fig. 1, the side walls of the bottoms of the primary settling chambers 11 of the two settling tanks 1 are connected with primary liquid discharge pipes 51, and the output ends of the two primary liquid discharge pipes 51 are connected to the same primary header pipe 52. The output end of the primary main pipe 52 is connected with two primary branch pipes 53, and each primary branch pipe 53 is provided with a liquid valve 9. The output end of each first-stage branch pipe 53 is integrally connected with a flange 8, so that the flange 8 is connected with a water pipe 10 of a squeezing dewatering part of the paper machine 3 and is used for spraying the paper flannel.

As shown in fig. 1, two secondary liquid discharge pipes 61 are connected to the bottom side walls of the two secondary settling chambers 12, and the output ends of the two secondary liquid discharge pipes 61 are connected to the same secondary header pipe 62. The output end of the secondary main pipe 62 is connected with two secondary branch pipes 63, the secondary branch pipes 63 are provided with liquid valves 9, and the output ends of the secondary branch pipes 63 are connected with the net part of the paper machine 3 and used for spraying the paper net blanket.

As shown in fig. 2, the bottoms of the two tertiary settling chambers 13, i.e., the bottoms of the two settling tanks 1, are connected with tertiary liquid discharge pipes 71, the output ends of the two tertiary liquid discharge pipes 71 are connected to the same tertiary header pipe 72, the liquid valve 9 is installed on the tertiary header pipe 72, and the output end of the tertiary header pipe 72 extends into the beater 2 from the top of the beater 2. To ensure that the water in the tertiary manifold 72 can be smoothly pumped into the beater 2, the water pump 25 is attached to the tertiary manifold 72. In order to facilitate maintenance and selectively open the settling tank 1 according to working conditions, liquid valves 9 are respectively arranged on the primary liquid discharge pipe 51, the secondary liquid discharge pipe 61 and the tertiary liquid discharge pipe 71.

As shown in fig. 3 and 4, in order to avoid a large amount of fibers or pulp carried in the clean water discharged from the primary discharge pipe 51, a filter 82 is detachably attached to the flange 8 at the output end of the primary branched pipe 53, the filter 82 has a cake-shaped net structure, and a plurality of insert blocks 81 are integrally connected to the periphery of the filter 82. A plurality of slots 83 are formed in the end face of the mounting end of the flange plate 8 of the first-level branch pipe 53, namely the slots 83 are formed in one end, far away from the first-level branch pipe 53, of the flange plate 8, and the slots 83 are evenly distributed along the circumferential direction of the inner wall of the flange plate 8. When the insert block 81 is completely inserted into the insertion groove 83, the outer end face of the insert block 81 is flush with the mounting end face of the flange 8, and the filter sheet 82 is embedded into the primary branched pipe 53, namely, the output end surface of the filter sheet 82 is not flush with the mounting end face of the flange 8, so that the connection sealing performance between the primary branched pipe 53 and the water pipe 10 is ensured.

In addition, in practice, the water pipe 10 at the paper machine 3 may be additionally provided with a water pump according to the actual water supply pressure. The inlet manifold 4 and other liquid delivery conduits are supported by fixed above ground support posts. The utility model discloses a according to the concrete technology setting in this factory, should not correspond the utility model discloses a substantive scheme causes the restriction. If the length and the relative position of each liquid conveying pipeline are only schematic in the trend of system liquid conveying, and do not represent the actual length and the relative position; the number of settling tanks 1, beaters 2, paper machines 3 etc. should not be limited to the conditions listed in the present invention.

The utility model discloses an implement the principle and specifically do:

the waste water generated by the beater 2 is discharged into the liquid inlet header pipe 4 from the sewage discharge pipe 21 and respectively enters the two settling tanks 1 through the two liquid inlet pipes 41; through natural sedimentation of wastewater in the sedimentation tank 1, the upper layer is clear, the middle layer contains fiber and a small amount of paper pulp, and the lower layer contains more paper pulp; the upper clear water is sent to the paper coarse cloth of the paper machine 3 after passing through a primary main pipe 52 and a primary branch pipe 53 through a primary liquid discharge pipe 51; the water containing fiber in the middle layer is sent to the paper net blanket of the paper machine 3 after passing through a secondary main pipe 62 and a secondary branch pipe 63 through a secondary liquid discharge pipe 61; after passing through the three-level header pipe 72 through the three-level liquid discharge pipe 71, the lower-layer pulp water is sent into the beater 2; and the waste water in the beater 2 is recycled.

In actual production, the opening sizes of the liquid valves 9 on the primary liquid discharge pipe 51, the secondary liquid discharge pipe 61 and the tertiary liquid discharge pipe 71 of the two settling tanks 1 are determined in advance according to working conditions and are all in a normally open state. When the process throughput changes, the water demand of the press water-reducing section and the wire section of the paper machine 3 changes, and the corresponding liquid valve 9 on one of the settling tanks 1 can be selectively closed.

The above-mentioned embodiments are merely illustrative of the present invention, and are not intended to limit the present invention, and those skilled in the art can make modifications to the embodiments without inventive contribution as required after reading the present specification, but all the embodiments are protected by patent laws and protection within the scope of the present invention.

Claims

1. The utility model provides a water cyclic utilization system of papermaking processing which characterized in that: the pulping machine comprises a plurality of vertical settling tanks (1) and a liquid inlet main pipe (4), wherein the input end of the liquid inlet main pipe (4) is connected with a sewage discharge pipe (21) of the pulping machine (2); the settling tank (1) sequentially comprises a primary settling chamber (11), a secondary settling chamber (12) and a tertiary settling chamber (13) which are communicated with each other from top to bottom; a primary liquid discharge pipe (51) is connected to the primary settling chamber (11), the primary liquid discharge pipe (51) is connected with a squeezing and dewatering part of the paper machine (3), a liquid inlet pipe (41) is connected to the top end of the primary settling chamber (11), and the input end of the liquid inlet pipe (41) is connected with the output end of the liquid inlet header pipe (4); a secondary liquid discharge pipe (61) is connected to the secondary settling chamber (12), and the secondary liquid discharge pipe (61) is connected with a net part of the paper machine (3); and the third-stage settling chamber (13) is connected with a third-stage liquid discharge pipe (71), and the third-stage liquid discharge pipe (71) is connected with the pulping machine (2).

2. The water recycling system of a papermaking process according to claim 1, wherein: and the primary liquid discharge pipe (51), the secondary liquid discharge pipe (61) and the tertiary liquid discharge pipe (71) are all provided with liquid valves (9).

3. The water recycling system of a papermaking process according to claim 2, wherein: the settling tank is characterized by further comprising a primary main pipe (52), the output ends of primary liquid discharge pipes (51) of the settling tanks (1) are connected with the primary main pipe (52), and the primary main pipe (52) is connected with the squeezing and dewatering part.

4. The water recycling system of a papermaking process according to claim 3, wherein: the output end of the primary header pipe (52) is connected with a plurality of primary branched pipes (53), the output end of the primary branched pipes (53) is connected with the squeezing and dewatering part, and the primary branched pipes (53) are provided with liquid valves (9).

5. The water recycling system of a papermaking process according to claim 4, wherein: the output end of the first-level branch pipe (53) is detachably provided with a filter disc (82).

6. The water recycling system of a papermaking process according to claim 5, wherein: the output end of the primary branched pipe (53) is integrally connected with a flange plate (8), one end, away from the primary branched pipe (53), of the flange plate (8) is provided with a slot (83), and the periphery of the filter sheet (82) is integrally connected with an insertion block (81) which is inserted into the slot (83) in a matching mode.

7. The water recycling system of a papermaking process according to claim 2, wherein: the system is characterized by further comprising a secondary main pipe (62), wherein the output ends of secondary liquid discharge pipes (61) of the settling tanks (1) are connected with the secondary main pipe (62), and the output end of the secondary main pipe (62) is connected with the net part.

8. The water recycling system of a papermaking process according to claim 7, wherein: the output end of the secondary main pipe (62) is connected with a plurality of secondary branch pipes (63), the output ends of the secondary branch pipes (63) are connected with the net part, and the secondary branch pipes (63) are provided with liquid valves (9).

9. The water recycling system of a papermaking process according to claim 2, wherein: the slurry-making device is characterized by further comprising a three-level main pipe (72), wherein the output ends of three-level liquid discharge pipes (71) of the settling tanks (1) are connected with the three-level main pipe (72), and the output end of the three-level main pipe (72) extends into the pulping machine (2).

10. The water recycling system of a papermaking process according to claim 9, wherein: and the three-stage main pipe (72) is provided with a liquid valve (9) and a water pump (25).