Water treatment equipment for removing suspended matters and organic pollutants in papermaking white water

Abstract

The water treatment equipment comprises an outer cylinder, an inner cylinder and a raw water inlet, the inner cylinder is fixedly connected to the interior of the outer cylinder, the upper end of the outer cylinder is fixedly connected with a sedimentation channel, the center of the top of the outer cylinder is rotatably connected with a slag scraping plate, and the slag scraping plate is fixedly connected with the sedimentation channel. A space is formed from the middle parts to the upper ends of the outer cylinder and the inner cylinder to form a second-stage reaction area, the upper end of the second-stage reaction area is connected with a second-stage gas-dissolved water inlet extending out of the outer cylinder, the inner cylinder is internally provided with a first-stage gas-dissolved water inlet extending out of the outer cylinder, and the first-stage gas-dissolved water inlet is located in the inner cylinder and is connected with a first-stage release device; the lower end of the secondary reaction zone is connected with an air flotation water outlet and an air flotation water intake which extend out of the outer cylinder, the lower end of the inner cylinder is provided with a conical sedimentation zone, the sedimentation zone is connected with a sewage draining exit which extends out of the outer cylinder, a sedimentation channel is connected with one end of a raw water inlet, and the other end of the raw water inlet extends out of the outer cylinder; the lower end of the slag scraper is positioned at the upper end of the inner cylinder.

Description

Technical Field

[0001] The utility model relates to the technical field of water treatment equipment, in particular to water treatment equipment for removing suspended matter and organic pollutants in papermaking white water. Background Art

[0002] Papermaking white water contains a large amount of suspended solids such as fibers, fillers and coatings, as well as soluble organic pollutants. In order to reduce pollution and save water, paper mills usually adopt partial or full reuse. The remaining white water can be recycled after simple treatment by fiber recovery, filtration, flotation or sedimentation. However, due to the unsatisfactory removal of fine fibers and organic pollutants in white water, long-term recycling will lead to the accumulation of various pollutants in the water circulation system, which will have a negative impact on the papermaking system and product quality. Utility Model Content

[0003] The utility model provides a water treatment device for removing suspended matter and organic pollutants in papermaking white water, and is used to solve the problems raised by the background technology.

[0004] To achieve the above-mentioned purpose, the utility model adopts the following technical scheme: a water treatment equipment for removing suspended matter and organic pollutants in papermaking white water, comprising an outer cylinder, an inner cylinder, and a raw water inlet, wherein the interior of the outer cylinder is fixedly connected to the inner cylinder, the upper end of the outer cylinder is fixedly connected to a sedimentation channel, the center of the top of the outer cylinder is rotatably connected to a scraper plate, a space is provided from the middle to the upper end of the outer cylinder and the inner cylinder to form a secondary reaction zone, a secondary dissolved air water inlet extending out of the outer cylinder is connected above the secondary reaction zone, a primary dissolved air water inlet extending out of the outer cylinder is provided inside the inner cylinder, the primary dissolved air water inlet is located inside the inner cylinder and is connected to a primary release device, an air flotation water outlet and an air flotation water intake extending out of the outer cylinder are connected below the secondary reaction zone, a conical sedimentation zone is provided at the lower end of the inner cylinder, the sedimentation zone is connected to a sewage outlet extending out of the outer cylinder, the sedimentation channel is connected to one end of the raw water inlet, the other end of the raw water inlet extends out of the outer cylinder, and the lower end of the scraper plate is located at the upper end of the inner cylinder.

[0005] Preferably, the lower end of the sedimentation channel is in a trumpet shape, and the trumpet shape is a conical sedimentation guide port.

[0006] Preferably, the center of the top of the outer cylinder is rotatably connected to the scraper plate, including: a motor bracket is fixedly connected to the top of the outer cylinder, the upper end of the motor bracket is fixedly connected to the motor, and the output end of the motor is fixedly connected to the scraper plate.

[0007] Preferably, the outside of the inner cylinder is located in the secondary reaction zone and is fixedly connected to a releaser.

[0008] Preferably, the releaser is installed on the annular pipeline, and the releaser is communicated with the secondary dissolved air water inlet.

[0009] Preferably, the upper end of the inner cylinder is in a sawtooth shape, which is convenient for intercepting pollutants such as fine fibers floating on the water surface.

[0010] Preferably, the outer cylinder is in a cylindrical shape, the lower end of the outer cylinder is closed, and the upper end is open.

[0011] Preferably, the length of the scraper plate is greater than the diameter of the upper end of the inner cylinder and smaller than the inner diameter of the outer cylinder.

[0012] Beneficial effects of the utility model:

[0013] The utility model discloses a water treatment device for removing suspended matter and organic pollutants in papermaking white water, which can achieve a multi-stage polymerization and separation effect of water pollutants. The device is divided into an inner cylinder and an outer cylinder. The upper end of the middle part of the inner cylinder is closed, and the lower end is open in a trumpet-shaped manner, and the water inlet pipe is located in the middle of the area. The advantage of this design is that the contact area between the settleable substances in the sedimentation separation zone and the cylinder wall is increased, thereby accelerating the sedimentation of such substances. Wastewater enters the equipment, and the aggregation and precipitation of particles are achieved in the sedimentation separation zone. The inner cylinder is a primary reaction zone. Through the primary dissolved air, in the primary reaction zone, oil and fine fiber pollutants in the wastewater are aggregated by a large number of tiny bubbles and float to the surface of the water body with the bubbles, and at the same time, settleable substances such as tiny particles in the wastewater sink to the sedimentation zone, achieving the first-stage polymerization of pollutants in the wastewater. The outer cylinder is a secondary reaction zone, and a multi-stage dissolved air reaction effect is achieved in this area. Wastewater overflows from the top into the outer cylinder, and the clear liquid at the bottom of the outer cylinder is used for dissolved gas. At the same time, the wastewater in the outer cylinder circulates in the outer cylinder to achieve a multi-stage dissolved gas effect. A large number of high-density tiny bubbles and wastewater with high oxygen content are generated in the secondary reaction zone. The bubbles aggregate the fine fibers and macromolecular substances remaining in the wastewater in the outer cylinder and float on the surface of the water body; a large amount of oxygen oxidizes some organic pollutants in the wastewater, and aggregates and floats on the surface of the water body under the action of bubbles. Thus, the second aggregation of suspended matter and organic pollutants in the wastewater is achieved. The pollutants floating on the surface of the water body are cleaned by the scraper. The pollutants in the sedimentation area of ​​the inner and outer cylinders are discharged out of the cylinder regularly.

[0014] Equipment advantages: 1. It polymerizes and removes pollutants such as suspended matter, particulate matter, and organic matter in the water; 2. It realizes multi-stage dissolved gas reaction, which not only increases the removal effect of suspended matter by flotation, but also increases the oxygen content in the water, and improves the effect of oxidative removal of organic matter. 3. It can have an independent secondary reaction zone, and the water treatment time and effect of the secondary reaction zone can be adjusted according to the water body conditions. 4. According to the actual situation of wastewater, the equipment can realize a variety of water treatment processes such as sedimentation first and then flotation, or flotation first and then sedimentation, or flotation oxidation. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1This is a schematic diagram of a water treatment device for removing suspended solids and organic pollutants in papermaking white water proposed by the utility model;

[0016] Figure 2 It is a stereoscopic diagram of a water treatment device for removing suspended solids and organic pollutants in papermaking white water proposed by the utility model;

[0017] Figure 3 This is a top view of a water treatment device for removing suspended solids and organic pollutants in papermaking white water proposed by the utility model;

[0018] Figure 4 It is a schematic diagram of a releaser installation pipeline of a water treatment device for removing suspended solids and organic pollutants in papermaking white water proposed by the utility model;

[0019] Figure 5 The utility model discloses a schematic diagram of a sedimentation channel of a water treatment device for removing suspended solids and organic pollutants in papermaking white water.

[0020] In the figure: outer cylinder 1, inner cylinder 2, secondary dissolved air water inlet 3, primary dissolved air water inlet 4, air flotation water outlet 5, sewage outlet 6, primary release device 7, air flotation water intake 8, scraper plate 9, motor 10, annular pipeline 11, sedimentation area 12, releaser 13, raw water inlet 14, motor bracket 15, sedimentation channel 16. DETAILED DESCRIPTION

[0021] The specific embodiments of the present invention will now be described in detail with reference to the accompanying drawings. For the purpose of clarity, many physical details will be described together in the following description. However, it should be understood that these physical details should not be used to limit the present invention. That is, in some embodiments of the present invention, these physical details are not necessary. In addition, for the purpose of simplifying the illustration, some conventional structures and components will be depicted in a simple schematic manner in the illustration.

[0022] like Figure 1-5As shown, the utility model is a water treatment equipment for removing suspended matter and organic pollutants in papermaking white water, comprising an outer cylinder 1, an inner cylinder 2, and a raw water inlet 14. The interior of the outer cylinder 1 is fixedly connected to the inner cylinder 2, the upper end of the outer cylinder 1 is fixedly connected to a sedimentation channel 16, the top center of the outer cylinder 1 is rotatably connected to a scraper plate 9, and a space is provided from the middle to the upper end of the outer cylinder 1 and the inner cylinder 2 to form a secondary reaction zone, a secondary dissolved air water inlet 3 extending from the outside of the outer cylinder 1 is connected above the secondary reaction zone, a first dissolved air water inlet 4 extending from the outside of the outer cylinder 1 is provided inside the inner cylinder 2, and the first dissolved air water inlet 4 is located inside the inner cylinder 2 and is connected to a first release device 7, and the model of the first release device 7 is 5T / h. The secondary reaction zone is connected to a flotation water outlet 5 and a flotation water inlet 8 extending out of the outer tube 1 below. A conical sedimentation zone 12 is provided at the lower end of the inner tube 2. The sedimentation zone 12 is connected to a sewage outlet 6 extending out of the outer tube 1. A sedimentation channel 16 is connected to one end of a raw water inlet 14. The other end of the raw water inlet 14 extends out of the outer tube 1. The lower end of the scraper plate 9 is located at the upper end of the inner tube 2.

[0023] Furthermore, the lower end of the sedimentation channel 16 is in a trumpet shape, and the trumpet shape is a conical sedimentation guide port.

[0024] Furthermore, the top center of the outer cylinder 1 is rotatably connected to the scraper plate 9, including a motor bracket 15 fixedly connected to the top of the outer cylinder 1, the upper end of the motor bracket 15 is fixedly connected to the motor 10, and the output end of the motor 10 is fixedly connected to the scraper plate 9.

[0025] Furthermore, the exterior of the inner tube 2 is located in the secondary reaction zone and is fixedly connected to a releaser 13 .

[0026] Furthermore, the releaser 13 is installed on the annular pipeline 11, and the releaser 13 is connected to the secondary dissolved air water inlet 3. The model of the releaser 13 is 3T / h.

[0027] Furthermore, the upper end of the inner tube 2 is in a sawtooth shape, which is convenient for intercepting pollutants such as fine fibers floating on the water surface.

[0028] Furthermore, the outer cylinder 1 is in a cylindrical shape, the lower end of the outer cylinder 1 is closed, and the upper end is open.

[0029] Furthermore, the length of the scraper plate 9 is greater than the diameter of the upper end of the inner cylinder 2 and smaller than the inner diameter of the outer cylinder 1 .

[0030] Embodiment: Papermaking white water enters the equipment through the raw water inlet 14 after being dissolved with air. The inner cylinder 2 is the primary reaction zone. In the primary reaction zone, the fine fibers and adhesives in the water are flocculated and float to the surface of the water body with the bubbles. At the same time, the fine particles in the water settle in the sedimentation zone 12. The clear liquid in the primary reaction zone overflows into the secondary reaction zone. Under the action of the micro-nano bubbles released in the secondary reaction zone, the fine fibers remaining in the water are flocculated and float to the surface of the water body driven by the bubbles. The organic pollutants remaining in the water are oxidized and flocculated to float to the surface of the water body. The pollutants floating on the surface of the water body are cleaned by the scraper 9.

[0031] The above description is only a specific implementation of the utility model and is not intended to limit the utility model. For those skilled in the art, the utility model may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the utility model shall be included in the scope of the claims of the utility model.

Claims

1. A water treatment device for removing suspended solids and organic pollutants from papermaking white water, characterized in that: The invention comprises an outer cylinder (1), an inner cylinder (2), and a raw water inlet (14); the interior of the outer cylinder (1) is fixedly connected to the inner cylinder (2); the upper end of the outer cylinder (1) is fixedly connected to a sedimentation channel (16); the center of the top of the outer cylinder (1) is rotatably connected to a scraper plate (9); a space is provided from the middle to the upper end of the outer cylinder (1) and the inner cylinder (2) to form a secondary reaction zone; a secondary dissolved gas water inlet (3) extending from the outer cylinder (1) is connected above the secondary reaction zone; the interior of the inner cylinder (2) is A primary dissolved air water inlet (4) extending out of the outer cylinder (1) is provided, the primary dissolved air water inlet (4) is located inside the inner cylinder (2) and is connected to a primary release device (7), a flotation water outlet (5) and a flotation water intake (8) extending out of the outer cylinder (1) are connected below the secondary reaction zone, a conical sedimentation zone (12) is provided at the lower end of the inner cylinder (2), the other end of the raw water inlet (14) extends out of the outer cylinder (1), and the lower end of the scraper plate (9) is located at the upper end of the inner cylinder (2).

2. The device according to claim 1, characterized in that The lower end of the sedimentation channel (16) is in a trumpet shape, and the trumpet shape is a conical sedimentation guide port.

3. The device according to claim 1, characterized in that The center of the top of the outer cylinder (1) is rotatably connected to a scraper plate (9), including: a motor bracket (15) is fixedly connected to the top of the outer cylinder (1), the upper end of the motor bracket (15) is fixedly connected to a motor (10), and the output end of the motor (10) is fixedly connected to the scraper plate (9).

4. The device according to claim 1, characterized in that The exterior of the inner cylinder (2) is located in the secondary reaction zone and is fixedly connected to a releaser (13).

5. The device according to claim 4, characterized in that The releaser (13) is installed on the annular pipeline (11), and the releaser (13) is connected to the secondary dissolved air water inlet (3).

6. The device according to claim 1, characterized in that The upper end of the inner cylinder (2) is in a sawtooth shape.

7. The device according to claim 1, characterized in that The outer cylinder (1) is in a cylindrical shape, the lower end of the outer cylinder (1) is closed, and the upper end is open.

8. The device according to claim 1, characterized in that The length of the scraper plate (9) is greater than the diameter of the upper end of the inner cylinder (2) and smaller than the inner diameter of the outer cylinder (1).

9. The device according to claim 1, characterized in that The sedimentation area (12) is connected to a sewage outlet (6) extending outside the outer cylinder (1), and the sedimentation channel (16) is connected to one end of the raw water inlet (14).

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