CN219195490U

CN219195490U - Papermaking black liquor desalination equipment

Info

Publication number: CN219195490U
Application number: CN202222448467.5U
Authority: CN
Inventors: 宋林丰; 杨志永; 魏法旭
Original assignee: Zhanjiang Chenming Pulp & Paper Co ltd
Current assignee: Zhanjiang Chenming Pulp & Paper Co ltd
Priority date: 2022-09-15
Filing date: 2022-09-15
Publication date: 2023-06-16
Anticipated expiration: 2032-09-15

Abstract

The utility model discloses papermaking black liquor desalting equipment, which belongs to the technical field of papermaking and comprises supporting legs and a treatment box arranged at the top of the supporting legs, wherein a drain pipe is arranged at the bottom of the treatment box, a liquid inlet pipe is arranged at the top of the treatment box, an acid-base balance adjusting box is arranged at the top of the liquid inlet pipe, a dosing pipe and a feeding pipe are arranged at the top of the acid-base balance adjusting box, a treatment assembly is arranged in the treatment box, the treatment assembly comprises a stirring assembly and a first trapezoid solid plate arranged below the stirring assembly, two sides of the first trapezoid solid plate are connected with the inner wall of the treatment box, a first discharging pipe is arranged at the bottom of the first trapezoid solid plate, a first control valve is arranged on the first discharging pipe, a second trapezoid filter plate is arranged below the first trapezoid solid plate, and two sides of the second trapezoid filter plate are connected with the inner wall of the treatment box. The device can make impurity in the papermaking black liquor deposit through the processing assembly, then discharge, reduces the harm of environment.

Description

Papermaking black liquor desalination equipment

Technical Field

The utility model relates to the technical field of papermaking, in particular to a papermaking black liquor desalting device.

Background

Three strands of water are discharged according to the working procedure in a paper mill, namely pulping cooking waste liquid, which is commonly called papermaking black liquid; secondly, washing, selecting and bleaching water of paper pulp after black liquor separation, which is also called middle water; and thirdly, white water on the paper machine can be reused after being treated. The middle water is the rest part of the incomplete black liquor extraction, which accounts for less than 10% of the total amount. The pollutant contained in the black liquor accounts for more than 90% of the total pollutant emission of the whole plant. The black liquor contains a large amount of suspended solids, organic pollutants and toxic substances, and serious pollution can be caused by directly discharging the suspended solids, the organic pollutants and the toxic substances into a water body. The main hazards are as follows: papermaking wastewater containing a large amount of fibers, pigments and inorganic salts can darken a water body and have special foul smell; the biochemical oxygen consumption (BOD) of the papermaking black liquor containing high-concentration organic pollutants can reach 5000-40000 g/L, so that a large amount of dissolved oxygen in water can be consumed, and the water quality is affected; the pH value of the water body is increased sharply due to the existence of a large amount of alkaline substances in the black liquor, and the balance of the water body environment is destroyed. Black liquor discharge is therefore a major source of environmental pollution in paper mills.

The utility model discloses a papermaking black liquor desalting device, wherein a water inlet is connected with a water conveying pipe to input black liquor into a shell, the desalting solvent in an inner pipe of the desalting solvent reacts with the black liquor to produce solid matters, a filter cartridge filters suspended solids, organic pollutants, toxic substances and the solid matters formed by reaction in the black liquor, a water outlet discharges the filtered black liquor, a sewage outlet discharges the filtered suspended solids, the organic pollutants, the toxic substances and the solid matters formed by reaction, but when the black liquor enters, the desalting solvent reacts with the black liquor, so that a long time is required for reaction, the precipitation time is long, if the filter cartridge is arranged, the precipitate in the black liquor enters the filter cartridge, and is difficult to automatically enter a trash discharging pipe, and blockage easily occurs.

Disclosure of Invention

In order to overcome the defects of the prior art, the utility model aims to provide a papermaking black liquor desalting device which solves the problems in the prior art.

In order to solve the technical problems, the utility model provides the following technical scheme: the utility model provides a papermaking black liquor desalination equipment, is in including supporting leg and setting the treatment box at supporting leg top, the treatment box bottom is provided with the drain pipe, just the treatment box top is provided with the feed liquor pipe, set up the fourth control valve on the feed liquor pipe, the feed liquor pipe top is provided with acid-base balance adjustment case, acid-base balance adjustment case top is provided with charge pipe and inlet pipe, just be provided with the processing subassembly in the treatment box.

As a preferable technical scheme of the utility model, the treatment assembly comprises a stirring assembly and a first trapezoid solid plate arranged below the stirring assembly, wherein two sides of the first trapezoid solid plate are connected with the inner wall of the treatment box, a first discharging pipe is arranged at the bottom of the first trapezoid solid plate, a first control valve is arranged on the first discharging pipe, a second trapezoid filter plate is arranged below the first trapezoid solid plate, two sides of the second trapezoid filter plate are connected with the inner wall of the treatment box, a ceramic heating rod is arranged below the second trapezoid filter plate, and the bottom of the ceramic heating rod is connected with the inner wall of the bottom of the treatment box.

Through the scheme, the following technical effects can be achieved: firstly, black liquor enters an acid-base balance adjusting box through a feed pipe, then the pH value of the black liquor is adjusted through manpower, so that the pH value of the black liquor reaches balance, then a desalting solvent is added through a dosing pipe, then the black liquor enters a treatment box through a liquid inlet pipe, then the precipitation speed of the black liquor is increased through a stirring assembly, water and sediment are separated, then the water and the sediment are controlled to enter a second trapezoid filter plate through a first control valve to separate the water and the sediment, and the sediment stays on the second trapezoid filter plate because the second trapezoid filter plate is trapezoid, the sediment can enter two inclined surfaces of the second trapezoid filter plate, then the water enters the lower part of the second trapezoid filter plate, and then the harmful substances in the water are steamed through a ceramic heating rod, so that the harmful substances in the water are removed, and then the sediment is discharged through a drain pipe.

As a preferable technical scheme of the utility model, a through hole is formed in the outer side of the treatment box, the through hole is positioned at the joint of the second trapezoid filter plate and the inner wall of the treatment box, a trash discharging pipe is arranged on the through hole, and a second control valve is arranged on the trash discharging pipe.

Through the scheme, the following technical effects can be achieved: the sediment can enter the two inclined surfaces of the second trapezoid filter plate, and then is discharged through the impurity discharging pipe on the through hole by the second control valve.

As a preferable technical scheme of the utility model, the stirring assembly comprises a motor and a rotating shaft provided with an output end of the motor, the motor is arranged at the top of the treatment box, one end of the rotating shaft, which is far away from the motor, penetrates through the treatment box, and a stirring rod is arranged outside the penetrating part of the rotating shaft.

Through the scheme, the following technical effects can be achieved: the stirring rod drives the black liquor to precipitate through the motor driving the rotating shaft, so that water and precipitate are separated, and the separation speed is increased.

As a preferable technical scheme of the utility model, the drain pipe is provided with a third control valve.

Through the scheme, the following technical effects can be achieved: the water is controlled to be discharged from the drain pipe by the third control valve.

As a preferable technical scheme of the utility model, a second filter plate is arranged in the acid-base balance adjusting box.

Through the scheme, the following technical effects can be achieved: and removing massive impurities in the black liquor in the acid-base balance adjusting box through the second filter plate.

Compared with the prior art, the utility model has the following beneficial effects:

1. the first trapezoid solid plate and the second trapezoid filter plate can separate water and sediment in the black liquor, and the sediment can be effectively discharged.

2. The speed of separating water from sediment in the black liquor is increased by the stirring component, and the separation speed is improved.

3. The acid and alkali can be regulated by the acid and alkali balance regulating box.

Drawings

FIG. 1 is a schematic view of the overall structure of the present utility model;

FIG. 2 is a schematic view of the structure of the inside of the present utility model;

FIG. 3 is a cross-sectional view of the entirety of the present utility model;

FIG. 4 is a schematic structural view of a first trapezoidal solid board according to the present utility model;

fig. 5 is a schematic structural view of a second trapezoid filter board of the present utility model.

Wherein: 1. support legs; 2. a treatment box; 3. a drain pipe; 4. a liquid inlet pipe; 5. an acid-base balance adjusting box; 6. a dosing tube; 7. a feed pipe; 8. a first trapezoidal solid plate; 9. a first discharge pipe; 10. a second trapezoidal filter plate; 11. a ceramic heating rod; 12. a trash discharging pipe; 13. a motor; 14. a rotating shaft; 15. a stirring rod; 16. and a second filter plate.

Detailed Description

In order that the manner in which the above recited features, objects and advantages of the present utility model are obtained will become readily apparent, a more particular description of the utility model will be rendered by reference to specific embodiments thereof which are illustrated in the appended drawings. Based on the examples in the embodiments, those skilled in the art can obtain other examples without making any inventive effort, which fall within the scope of the utility model. The experimental methods in the following examples are conventional methods unless otherwise specified, and materials, reagents, etc. used in the following examples are commercially available unless otherwise specified.

Example 1

Referring to fig. 1-5, the utility model provides a papermaking black liquor desalting device, which comprises supporting legs 1 and a treatment tank 2 arranged at the top of the supporting legs 1, wherein a drain pipe 3 is arranged at the bottom of the treatment tank 2, a liquid inlet pipe 4 is arranged at the top of the treatment tank 2, a fourth control valve is arranged on the liquid inlet pipe 4, an acid-base balance regulating tank 5 is arranged at the top of the liquid inlet pipe 4, a dosing pipe 6 and a feed pipe 7 are arranged at the top of the acid-base balance regulating tank 5, a treatment assembly is arranged in the treatment tank 2, the treatment assembly comprises a stirring assembly and a first trapezoid solid plate 8 arranged below the stirring assembly, two sides of the first trapezoid solid plate 8 are connected with the inner wall of the treatment tank 2, a first discharge pipe 9 is arranged at the bottom of the first trapezoid solid plate 8, a second trapezoid filter plate 10 is arranged below the first trapezoid filter plate 8, two sides of the second trapezoid filter plate 10 are connected with the inner wall of the treatment tank 2, a ceramic heating rod 11 is arranged below the second trapezoid filter plate 10, and the bottom of the ceramic heating rod 11 is connected with the inner wall of the bottom of the treatment tank 2.

Specifically, firstly, black liquor enters an acid-base balance adjusting box 5 through a feed pipe 7, then the pH value is adjusted by manpower, so that the pH value of the black liquor reaches balance, then a desalting solvent is added through a dosing pipe 6, then the black liquor enters a treatment box 2 through a liquid inlet pipe 4, then the precipitation speed of the black liquor is increased through a stirring assembly, water and precipitates are separated, then the water and the precipitates are controlled to enter a second trapezoid filter plate 10 through a first discharge pipe 9 to separate the water and the precipitates through a first control valve, the precipitates stay in the second trapezoid filter plate 10, because the second trapezoid filter plate 10 is trapezoid, the precipitates can enter two inclined surfaces of the second trapezoid filter plate 10, then the water enters the lower part of the second trapezoid filter plate 10, and then the harmful substances in the water are steamed through a ceramic heating rod 11, so that the harmful substances in the water are removed, and then the harmful substances are discharged through a drain pipe 3.

As a preferred technical scheme of the utility model, as shown in fig. 2 or fig. 3, a through hole is formed on the outer side of the treatment tank 2, the through hole is located at the joint of the second trapezoid filter plate 10 and the inner wall of the treatment tank 2, a trash discharging pipe 12 is arranged on the through hole, and a second control valve is arranged on the trash discharging pipe 12.

Specifically, the sediment enters the two inclined surfaces of the second trapezoid filter plate 10, and is discharged through the impurity discharging pipe 12 on the through hole by the second control valve.

As a preferable technical scheme of the utility model, as shown in fig. 2 or 3, the stirring assembly comprises a motor 13 and a rotating shaft 14 provided with an output end of the motor 13, the motor 13 is arranged at the top of the processing box 2, one end of the rotating shaft 14 away from the motor 13 penetrates through the processing box 2, and a stirring rod 15 is arranged outside the penetrating part of the rotating shaft 14.

Specifically, the motor 13 drives the rotating shaft 14 to enable the stirring rod 15 to drive the black liquor to precipitate, so that water and precipitate are separated, and the separation speed is increased.

As a preferred embodiment of the present utility model, as shown in fig. 2, a third control valve is provided to the drain pipe 3.

Specifically, the water is controlled to be discharged from the drain pipe 3 by the third control valve.

As a preferred embodiment of the present utility model, as shown in fig. 2, a second filter plate 16 is disposed in the acid-base balance adjusting tank 5.

Specifically, the second filter plate 16 is used for removing bulk impurities in the black liquor in the acid-base balance adjusting box 5.

Working principle: firstly, black liquor enters an acid-base balance adjusting box 5 through a feed pipe 7, then the pH value of the black liquor is adjusted through manpower, the pH value of the black liquor reaches the balance, then a desalting solvent is added through a dosing pipe 6, then the black liquor enters a treatment box 2 through a liquid inlet pipe 4, a rotating shaft 14 is driven by a motor 13 to drive a stirring rod 15 to precipitate, water and precipitate are separated, so that the separation speed is increased, then water and precipitate are controlled by a first control valve to enter a second trapezoid filter plate 10 through a first discharge pipe 9 to separate the water and the precipitate, the precipitate stays on the second trapezoid filter plate 10, because the second trapezoid filter plate 10 is trapezoid, the precipitate can enter two inclined surfaces of the second trapezoid filter plate 10, then the water enters the lower part of the second trapezoid filter plate 10, and then the harmful substances in the water are steamed through a ceramic heating rod 11, so that the harmful substances in the water are removed, and then discharged through a drain pipe 3.

In the present utility model, unless expressly stated or limited otherwise, a first feature "above" or "below" a second feature may include both the first and second features being in direct contact, as well as the first and second features not being in direct contact but being in contact with each other through additional features therebetween. Moreover, a first feature being "above," "over" and "on" a second feature includes the first feature being directly above and obliquely above the second feature, or simply indicating that the first feature is higher in level than the second feature. The first feature being "under", "below" and "beneath" the second feature includes the first feature being directly under and obliquely below the second feature, or simply means that the first feature is less level than the second feature.

The foregoing has shown and described the basic principles, principal features and advantages of the utility model. It will be understood by those skilled in the art that the present utility model is not limited to the above-described embodiments, and that the above-described embodiments and descriptions are only preferred embodiments of the present utility model, and are not intended to limit the utility model, and that various changes and modifications may be made therein without departing from the spirit and scope of the utility model as claimed. The scope of the utility model is defined by the appended claims and equivalents thereof.

Claims

1. Papermaking black liquor desalination equipment, including supporting leg (1) and setting up treatment box (2) at supporting leg (1) top, its characterized in that: the treatment box is characterized in that a drain pipe (3) is arranged at the bottom of the treatment box (2), a liquid inlet pipe (4) is arranged at the top of the treatment box (2), a fourth control valve is arranged on the liquid inlet pipe (4), the top of the liquid inlet pipe (4) is connected with an acid-base balance adjusting box (5), a dosing pipe (6) and a feeding pipe (7) are arranged at the top of the acid-base balance adjusting box (5), and a treatment assembly is arranged inside the treatment box (2).

2. A papermaking black liquor desalination apparatus according to claim 1, wherein: the processing assembly comprises a stirring assembly and a first trapezoid solid plate (8) arranged below the stirring assembly, wherein two sides of the first trapezoid solid plate (8) are connected with the inner wall of the processing box (2), a first discharging pipe (9) is arranged at the bottom of the first trapezoid solid plate (8), a first control valve is arranged on the first discharging pipe (9), a second trapezoid filter plate (10) is arranged below the first trapezoid solid plate (8), two sides of the second trapezoid filter plate (10) are connected with the inner wall of the processing box (2), a ceramic heating rod (11) is arranged below the second trapezoid filter plate (10), and the bottom of the ceramic heating rod (11) is connected with the inner wall of the bottom of the processing box (2).

3. A black liquor desalination apparatus according to claim 2, wherein: the outer side of the treatment box (2) is provided with a through hole, the through hole is positioned at the joint of the second trapezoid filter plate (10) and the inner wall of the treatment box (2), the through hole is provided with a trash discharging pipe (12), and the trash discharging pipe (12) is provided with a second control valve.

4. A black liquor desalination apparatus according to claim 2, wherein: the stirring assembly comprises a motor (13) and a rotating shaft (14) arranged at the output end of the motor (13), the motor (13) is arranged at the top of the treatment box (2), one end, far away from the motor (13), of the rotating shaft (14) penetrates through the treatment box (2), and a stirring rod (15) is arranged outside the penetrating part of the rotating shaft (14).

5. A papermaking black liquor desalination apparatus according to claim 1, wherein: and a third control valve is arranged on the drain pipe (3).

6. A papermaking black liquor desalination apparatus according to claim 1, wherein: a second filter plate (16) is arranged in the acid-base balance adjusting box (5).