Device for improving white water quality
By introducing an air flotation machine and filter into the white water treatment system, combined with a conical filter screen and water spray pipe design, the problem of deteriorating white water quality in multi-disc concentrators was solved, the suspended matter concentration in the ultra-clear filtrate was reduced, and production stability was ensured.
Patent Information
- Application Number
- CN202422432593.0
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-10-09
- Publication Date
- 2025-09-16
- Estimated Expiration
- 2034-10-09
AI Technical Summary
In the prior art, the quality of white water treated by the multi-disc thickener decreases, resulting in an increase in the concentration of suspended solids in the ultra-clear white water, which affects the production effect of the wire section.
A combination of flotation machine and filter is adopted, a bypass pipe of ultra-clear filtrate pool is set, and a conical filter screen and water spray pipe structure are used in the filter. The filter screen is rotated by spraying water to improve the filtration effect. The conical filter screen and rotating rod design are combined to enhance the filtration effect and filter screen life.
The concentration of suspended matter in the ultra-clear filtrate is significantly reduced, meeting normal production requirements and improving the quality of white water.
Smart Images
Figure CN223342464U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of papermaking, in particular to a device for improving the quality of white water. Background Art
[0002] In the existing technology, papermaking whitewater is treated in a multi-disc thickener and then sent to a turbid filtrate tank, a whitewater clear filtrate tank, and an ultra-clear filtrate tank, respectively. However, with the increase in actual production speed, the aging of the multi-disc thickener, and the increasing demand for ultra-clear whitewater, the multi-disc thickener's whitewater treatment efficiency has deteriorated. The suspended solids content in the ultra-clear whitewater has increased from 20-50 PPM to 150-200 PPM, seriously affecting the effectiveness of the whitewater used in the wire section. This causes a large accumulation of fine fibers throughout the wire circuit, which over time turns into fiber sludge, seriously affecting production. In view of the above technical issues, it is necessary to propose a new technical solution to improve the quality of whitewater treatment and ensure normal production. Utility Model Content
[0003] In view of the above-mentioned deficiencies in the prior art, the purpose of the present invention is to provide a device for improving the quality of white water, aiming to solve the technical problem of the deterioration of the quality of white water treated by the multi-disc concentrator in the prior art.
[0004] In order to achieve the above purpose, the utility model adopts the following technical solutions:
[0005] A device for improving white water quality comprises a multi-disc concentrator, a turbid filtrate tank, a clear filtrate tank, and an ultra-clear filtrate tank, wherein the inlet ends of the turbid filtrate tank, the clear filtrate tank, and the ultra-clear filtrate tank are respectively connected to the multi-disc concentrator via pipelines; the device for improving white water quality further comprises an air flotation machine and a filter; the inlet end of the filter is respectively connected to the clear filtrate tank and the air flotation machine via pipelines; the outlet pipe of the filter is connected to the inlet end of the ultra-clear filtrate tank; the ultra-clear filtrate tank is provided with a bypass pipe, which is connected to the inlet end of the filter.
[0006] Furthermore, in the device for improving the quality of white water, the filter includes a shell, a conical filter screen, a water inlet pipe and a slag discharge pipe; the conical filter screen is rotatably connected to the shell, the water inlet pipe passes through the bottom of the shell and extends into the conical filter screen, and at least two water spray pipes are connected to the top of the water inlet pipe, each water spray pipe is respectively provided with several water spray outlets; the slag discharge pipe is arranged on the outside of the water inlet pipe; and the shell is provided with a water outlet.
[0007] Furthermore, in the device for improving the quality of white water, the specifications of each water spray pipe are the same, and the directions of the water spray outlets in the same water spray pipe are the same; in the horizontal plane projection, the axis of the water spray outlets on each water spray pipe does not coincide with the axis of the corresponding water spray pipe.
[0008] Furthermore, in the device for improving the quality of white water, a bracket is provided on the top of the conical filter screen, the bracket is connected to a rotating rod, and the rotating rod is connected to the shell.
[0009] Furthermore, in the device for improving the quality of white water, the slag discharge pipe, the water inlet pipe, and the conical filter are coaxially arranged.
[0010] Furthermore, in the device for improving the quality of white water, a conical pipe is provided at the top end of the slag discharge pipe, and the conical pipe is arranged opposite to the bottom end of the conical pipe.
[0011] Beneficial effect: The utility model provides a device for improving the quality of white water. Compared with the existing technology, by arranging an air flotation machine and a filter, and arranging a bypass pipe in the ultra-clear filtrate pool and connecting it to the filter, the quality of the ultra-clear filtrate in the ultra-clear filtrate pool is improved, and the concentration of suspended matter in the ultra-clear filtrate is greatly reduced, which can meet normal production requirements. BRIEF DESCRIPTION OF THE DRAWINGS
[0012] Figure 1 Schematic diagram of a device for improving white water quality.
[0013] Figure 2 A schematic front view of a filter for improving the quality of white water.
[0014] Figure 3 Schematic diagram of the top view of the conical filter and the water spray pipe. DETAILED DESCRIPTION
[0015] The present invention provides a device for improving the quality of white water. To make the purpose, technical solution and effect of the present invention clearer and more specific, the present invention is further described in detail below. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention.
[0016] See also Figures 1 to 3 The present invention provides a device for improving the quality of white water. The accompanying drawings are only for explaining the structural principles and are not to scale with the actual product. The accompanying drawings only depict structures relevant to the invention of this application and do not specifically depict some conventional structures. Figure 2 The wall thickness of each structure is not shown. Figure 2 The interior structure shown is not actually directly observable from the outside. Figure 1 The solid arrows in the middle indicate the direction of water flow. Figure 2 and Figure 3 The solid arrow in the figure indicates the direction of water spraying, and the dotted arrow in the figure indicates the direction of slag discharge.
[0017] The device for improving white water quality includes a multi-disc thickener 1, a turbid filtrate tank 21, a clear filtrate tank 22, and an ultra-clear filtrate tank 23. The inlet ends of the turbid filtrate tank, the clear filtrate tank, and the ultra-clear filtrate tank are each connected to the multi-disc thickener via a pipeline. The device also includes a flotation machine 3 and a filter 4; the inlet end of the filter is connected to the clear filtrate tank and the flotation machine via a pipeline, respectively; the outlet pipe of the filter is connected to the inlet end of the ultra-clear filtrate tank. The ultra-clear filtrate tank is provided with a bypass pipe 239, which is connected to the inlet end of the filter.
[0018] like Figure 2 As shown, the filter comprises a housing 40, a conical filter screen 43, a water inlet pipe 41 and a slag discharge pipe 44; the conical filter screen is rotatably connected to the housing, the water inlet pipe passes through the bottom of the housing and extends into the conical filter screen, and the top of the water inlet pipe is connected to at least two water spray pipes 42, each of which is provided with a plurality of water spray ports ( Figure 2 and Figure 3 The solid arrows in the middle correspond to the water spray outlets. A slag discharge pipe is located outside the water inlet pipe; the housing is provided with a water outlet 401. During operation, white water treated by the flotation machine, clear filtrate from the clear filtrate tank, and ultra-clear filtrate from the ultra-clear filtrate tank bypass pipe enter the various water spray pipes through the water inlet pipe. From these outlets, they are sprayed onto the conical filter screen, achieving filtration. The filtrate filtered by the conical filter screen is discharged from the water outlet of the housing and sent to the ultra-clear filtrate tank. The filter residue is discharged from the bottom of the conical filter screen downward into the inspection pipe.
[0019] Furthermore, the specifications of each water spray pipe are the same, and the directions of the water spray ports in the same water spray pipe are the same; in horizontal plane projection, the axis of each water spray port on each water spray pipe does not coincide with the axis of the corresponding water spray pipe. Figure 3 As shown, the water sprayed from the water nozzle has a component in the circumferential direction, so that the water sprayed from the water nozzle can push the conical filter to rotate, so that the conical filter can be evenly contacted with the sprayed water, thereby improving the filtering effect and the service life of the filter.
[0020] Figure 2 and Figure 3 Only two water spray pipes are shown. In actual applications, more than two water spray pipes can be provided, and the water spray pipes are arranged at equal intervals in the circumferential direction.
[0021] Furthermore, a bracket 431 is provided at the top of the conical filter screen, which is connected to a rotating rod 49, which is connected to the housing. Preferably, the rotating rod and the conical filter screen are coaxially arranged. When the water spray pipe sprays water onto the conical filter screen, the conical filter screen and the rotating rod rotate together.
[0022] like Figure 2As shown, preferably, the axis of each water spray pipe 42 is parallel to the inner wall of the conical filter 43 (i.e., the inclination angle of the water spray pipe axis is equal to the inclination angle of the generatrix of the conical filter). This arrangement ensures that each water spray port is at an equal distance from the inner wall of the conical filter, making it easier to drive the filter to rotate when spraying water.
[0023] Preferably, the slag discharge pipe, the water inlet pipe, and the conical filter are coaxially arranged.
[0024] like Figure 2 As shown, further, a conical tube 441 is provided at the top of the slag discharge pipe 44, and the conical tube position is arranged opposite to the bottom of the conical tube. By setting the conical tube, the filter residue discharged by the conical filter screen can enter the slag discharge pipe more easily.
[0025] From the above analysis, it can be seen that by setting up an air flotation machine and a filter, and setting up a bypass pipe in the ultra-clear filtrate pool and connecting it to the filter, the quality of the ultra-clear filtrate in the ultra-clear filtrate pool is improved, and the concentration of suspended matter in the ultra-clear filtrate is greatly reduced, which can meet normal production requirements.
[0026] It is understandable that those skilled in the art can make equivalent substitutions or changes based on the technical solution and the utility model concept of the present invention, and all these changes or substitutions should fall within the scope of protection of the present invention.
Claims
1. A device for improving white water quality, comprising a multi-disc thickener, a turbid filtrate tank, a clear filtrate tank, and an ultra-clear filtrate tank, wherein the inlet ends of the turbid filtrate tank, the clear filtrate tank, and the ultra-clear filtrate tank are respectively connected to the multi-disc thickener through pipelines, characterized in that: The device for improving the quality of white water also includes a flotation machine and a filter; the inlet end of the filter is connected to the clear filtrate pool and the flotation machine through pipelines respectively; the outlet pipeline of the filter is connected to the inlet end of the ultra-clear filtrate pool; the ultra-clear filtrate pool is provided with a bypass pipe, which is connected to the inlet end of the filter.
2. The device for improving white water quality according to claim 1, characterized in that: The filter includes a shell, a conical filter screen, a water inlet pipe and a slag discharge pipe; the conical filter screen is rotatably connected to the shell, the water inlet pipe passes through the bottom of the shell and extends into the conical filter screen, the top of the water inlet pipe is connected to at least two water spray pipes, each water spray pipe is provided with several water spray outlets; the slag discharge pipe is arranged on the outside of the water inlet pipe; the shell is provided with a water outlet.
3. The device for improving white water quality according to claim 1, characterized in that: The specifications of each water spray pipe are the same, and the directions of the water spray outlets in the same water spray pipe are the same; in the horizontal plane projection, the axis of each water spray outlet on each water spray pipe does not coincide with the axis of the corresponding water spray pipe.
4. The device for improving white water quality according to claim 1, characterized in that: A bracket is provided on the top of the conical filter screen, and the bracket is connected to a rotating rod, and the rotating rod is connected to the shell.
5. The device for improving white water quality according to claim 1, characterized in that: The slag discharge pipe, the water inlet pipe, and the conical filter are coaxially arranged.
6. The device for improving white water quality according to claim 5, characterized in that: The top of the slag discharge pipe is provided with a section of a tapered pipe, and the tapered pipe is arranged opposite to the bottom end of the tapered pipe.