Papermaking wastewater fiber recovery device

Abstract

The invention relates to a papermaking wastewater fiber recovery device which is characterized in that a main water distribution channel positioned at a high position is butted and communicated with a plurality of branch water channels below through a main water distribution hole in the bottom, two rows of vertical water distribution lattice walls are arranged in each branch water channel along the length direction and divide the branch water channel into a middle chamber, a left chamber and a right chamber, and the main water distribution hole is opposite to the middle chamber; the bottom of the water distribution lattice wall is provided with an overflowing channel, the middle cavity is communicated with the left cavity and the right cavity, the weir crest portions on the two sides of the water distribution canal are provided with vertical water uniformizing plates, the outer side of the weir crest is provided with a net frame inclining downwards, inclined net cloth is laid on the net frame, and the bottom end of the net frame is provided with a horizontal chute bottom plate in the length direction. A vertical chute baffle is arranged on the extending outer side of the chute bottom plate in the length direction, and a collecting groove used for collecting fiber agglomerates is formed. Wastewater uniformly flows through the water passing surface of the inclined net, fibers are efficiently intercepted on the inclined net surface and form fiber bundle clusters to roll down under the action of inlet water washing and gravity, and slurry-water separation is realized through the action of gravity in the whole process.

Description

Technical Field

[0001] The invention relates to a papermaking wastewater fiber recovery device. Background Art

[0002] The papermaking industry consumes a lot of water, and its wastewater discharge is large and contains a wide variety of pollutants, which has a serious impact on the environment. During the production process, a large amount of fiber material will be discharged into the sewage treatment plant along with the wastewater, increasing the processing load of subsequent treatment units.

[0003] At present, the fiber recovery technology for papermaking wastewater mainly uses drum screen machines, etc. Due to the production plan of papermaking enterprises, changes in waste paper raw materials and other reasons, the discharge volume fluctuates greatly, the impurities and pollutants in the wastewater are high, the fiber recovery equipment operates unstable, the fiber recovery efficiency is poor, and the unstable solid content of the recovered fiber brings difficulties to transportation. The humus acidification of the wastewater easily causes corrosion of mechanical components and other problems, resulting in low fiber recovery efficiency in papermaking wastewater, increasing the processing load of the subsequent wastewater treatment system and increasing transportation costs.

[0004] Existing wastewater treatment methods have problems such as low efficiency, high cost, and unstable operation. It is urgent to design papermaking wastewater fiber recovery equipment to solve the problem of unstable operation of sewage treatment units, so as to realize the utilization of waste resources. Summary of the invention

[0005] The purpose of the present invention is to overcome the deficiencies of the prior art and provide a papermaking wastewater fiber recovery device.

[0006] The purpose of the present invention is achieved through the following technical solutions:

[0007] The fiber recovery device for papermaking wastewater is characterized in that: a main water distribution channel located at a high place is connected to multiple control water channels below through the main water distribution hole at the bottom, two rows of vertical water distribution flower walls are arranged in each control water channel along the length direction, the control water channel is divided into a middle chamber and left and right chambers, the main water distribution hole is directly opposite to the middle chamber, the bottom of the water distribution flower wall has a flow channel, the middle chamber is connected with the left and right chambers, vertical water equalizing plates are installed at the weirs on both sides of the control water channel, a downwardly inclined grid is arranged on the outside of the weir, an inclined mesh cloth is laid on the grid, a horizontal chute bottom plate is arranged at the bottom end of the grid along the length direction, and a vertical chute baffle is arranged on the extended outside of the chute bottom plate along the length direction to form a collection trough for collecting fiber clusters.

[0008] Furthermore, in the above-mentioned papermaking wastewater fiber recovery device, the water distribution plate is provided with a plurality of adjustment holes or waist-shaped holes from bottom to top, and is fixed to the weir mouth by bolts.

[0009] Furthermore, in the above-mentioned papermaking wastewater fiber recovery device, a felt cloth is laid in the area where the inclined mesh cloth transitions to the water outlet of the water equalizing plate.

[0010] Furthermore, in the above-mentioned papermaking wastewater fiber recovery device, the oblique mesh cloth is a nylon mesh cloth with a mesh size of 80 to 100.

[0011] Furthermore, in the above-mentioned papermaking wastewater fiber recovery device, the grid comprises a grid support frame and a plurality of transverse ribs evenly spaced in the transverse direction and a plurality of vertical ribs evenly spaced in the vertical direction arranged thereon.

[0012] Furthermore, in the above-mentioned papermaking wastewater fiber recovery device, the material of the chute bottom plate is stainless steel, and its smooth working surface has a slope structure, and is provided with a collecting port for collecting fiber clusters. The fiber clusters can freely flow into the collecting port for collection, and the collecting port is connected to a fiber storage tank, and a mechanical stirring device is installed in the fiber storage tank.

[0013] Furthermore, in the above-mentioned papermaking wastewater fiber recovery device, an auxiliary interface is provided at the end of the collecting tank, which is connected to a faucet for flushing the working surface of the chute bottom plate.

[0014] Furthermore, in the above-mentioned papermaking wastewater fiber recovery device, a lifting pipeline is arranged on the main water distribution channel, and the lifting pipeline is connected to the wastewater pipeline containing fiber materials.

[0015] Compared with the prior art, the present invention has significant advantages and beneficial effects, which are specifically embodied in the following aspects:

[0016] ① Utilizing the interception effect of the dense inclined net, the fiber impurities in the wastewater can be separated stably and efficiently. The separated fiber materials can be automatically transported back to the workshop for recycling or reuse by gravity or pumping, realizing waste resource utilization; reducing the processing load of the subsequent units of the sewage treatment plant, significantly improving the fiber slurry separation efficiency, and improving the benefits of waste resource utilization;

[0017] ② Through the reasonable design of the main distribution channel and the control channel and the rational distribution of hydraulic power, the wastewater is evenly distributed to multiple control channels for uniform water discharge, saving floor space. The uniform water distribution can make the wastewater flow evenly through the inclined mesh water surface, making the fiber interception efficiency more stable and efficient, and the fiber recovery rate is high;

[0018] ③ The fibers are efficiently retained on the surface of the inclined net, and under the action of water flushing and gravity, the fiber bundles are formed and roll down, with a high fiber retention rate. The fiber bundles retain a certain humidity and are collected in the fiber collection tank; the whole process realizes the separation of pulp and water through gravity, without mechanical moving components, and low operating energy consumption;

[0019] ④Fiber bundles with a certain moisture content are collected in the fiber collection tank. The surface of the fiber collection tank is smooth and is installed with a certain angle slope toward the fiber collection port. With the help of a small amount of clean water flushing, most of the fiber bundles automatically slide into the fiber collection port. The whole process does not require manual operation, saving labor, and the fiber bundles are collected in time.

[0020] Other features and advantages of the present invention will be described in the following description, and partly become apparent from the description, or be understood by practicing the specific embodiments of the present invention. The purpose and other advantages of the present invention can be realized and obtained by the structures particularly pointed out in the written description and the drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required for use in the embodiments are briefly introduced below. It should be understood that the following drawings only show certain embodiments of the present invention and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other related drawings can be obtained based on these drawings without creative work.

[0022] Figure 1 : A schematic diagram of the structure of the main distribution channel and the control channel of the device of the present invention;

[0023] Figure 2 : Schematic diagram of the top view of the control channel;

[0024] Figure 3 : Schematic diagram of the main view of the control canal;

[0025] Figure 4 : Figure 3 A partial enlarged schematic diagram of the middle A part;

[0026] Figure 5 : Figure 3 A partial enlarged schematic diagram of the middle B part;

[0027] Figure 6 : Schematic diagram of the structure of the grid;

[0028] Figure 7 : Schematic diagram of auxiliary interface settings;

[0029] Figure 8 : Schematic diagram of the structure of the water balancing plate. DETAILED DESCRIPTION

[0030] The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. The components of the embodiments of the present invention generally described and shown in the drawings here can be arranged and designed in various different configurations. Therefore, the following detailed description of the embodiments of the present invention provided in the drawings is not intended to limit the scope of the claimed invention, but merely represents the selected embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without making creative work belong to the scope of protection of the present invention.

[0031] It should be noted that similar reference numerals and letters represent similar items in the following drawings, so once an item is defined in one drawing, it does not need to be further defined and explained in the subsequent drawings. At the same time, in the description of the present invention, directional terms and order terms are only used to distinguish the description and cannot be understood as indicating or implying relative importance.

[0032] like Figures 1 to 5 As shown, in the papermaking wastewater fiber recovery device, the main water distribution channel 2 located at a high place is connected to the multiple control water channels 4 below through the main water distribution hole 3 at the bottom. A lifting pipe 1 is arranged on the main water distribution channel 2, and the lifting pipe 1 is connected to the wastewater pipe containing fiber material. Two rows of vertical water distribution flower walls 5 are arranged in the length direction (Y axis) of each control water channel 4 to separate the control water channel 4 into a middle chamber and left and right chambers. The main water distribution hole 3 is directly opposite to the middle chamber. The bottom of the water distribution flower wall 5 has a flow channel 6 to connect the middle chamber with the left and right chambers. Vertical water balancing plates 7 are installed at the weirs on both sides of the control water channel 4. The water balancing plates 7 are provided with multiple adjustment holes or waist-shaped holes from bottom to top, such as Figure 8 , fixed to the weir mouth by bolts 8; a downwardly inclined grid frame 10 is provided on the outer side of the weir mouth, an inclined mesh cloth is laid on the grid frame 10, and a felt cloth 9 is laid in the transition area between the inclined mesh cloth and the water outlet of the water equalizing plate 7. The inclined mesh cloth is a nylon mesh cloth with 80 to 100 meshes, which is resistant to wastewater corrosion and has a long service life; a horizontal chute bottom plate 11 is provided at the bottom end of the grid frame 10 along the length direction, and an upright chute baffle 12 is provided on the extended outer side of the chute bottom plate 11 along the length direction to form a collection trough for collecting fiber clusters. The chute bottom plate 11 is made of stainless steel and has a smooth working surface with a slope structure.

[0033] The water inlet and distribution ditch is cleverly designed. Wastewater containing a large amount of fiber material is lifted to the main distribution channel 2 at a high place through the lifting pipe 1. The orientation, size and flow rate of the main distribution channel 2 are used to evenly distribute the wastewater, which is convenient for the compact arrangement of the inclined mesh. Wastewater enters the control channel 4 from the main distribution channel 2 through the main distribution hole 3, and is rectified and dissipated through the water distribution flower wall 5 and the flow channel 6 to prevent the inertia of the water flow from scouring the outlet weir. Wastewater flows out evenly along the long side of the control channel 4 to prevent short-circuiting. The height of the water balancing plate 7 can be adjusted according to the needs and operating conditions through the bolts 8 and the adjustment holes on the water balancing plate 7. The felt cloth 9 plays the role of secondary water balancing and energy dissipation, preventing the outlet of the water balancing plate 7 from directly scouring the inclined mesh, improving the filtration efficiency, and extending the service life of the inclined mesh. The main distribution channel 2 and the control channel 4 are both in the form of open ditches, and the inspection operation is more intuitive and convenient, and easy to control and adjust. The height of the water balancing plate 7 can be adjusted according to the needs and operating conditions.

[0034] like Figure 6 The grid 10 includes a grid support frame 13 and a plurality of horizontal ribs 14 evenly spaced in the horizontal direction and a plurality of vertical ribs 15 evenly spaced in the vertical direction. The grid support frame 13 is made of stainless steel and has a long service life. A reasonably designed inclined mesh filter structure is designed, through the calculation of the horizontal ribs 14 and the vertical ribs 15, and the appropriate installation angle of the grid 10, so that the wastewater with a large amount of fiber material can fall freely and evenly on the inclined mesh cloth after being distributed by the water balancing plate 7, and the fiber material is effectively separated. The fibers intercepted in the early stage work together with the inclined mesh cloth to form a denser filter mesh, which efficiently intercepts the fiber material in the wastewater and quickly gathers into a ball. Under the action of the scouring force of the incoming water and the gravity of the fiber ball, the fiber ball rolls down along the inclined mesh cloth, and the wastewater in the fiber ball is further squeezed and filtered out, and the drier fiber ball is separated from the wastewater, thereby realizing efficient separation of wastewater and fiber material, effectively solving the problems of insufficient filtration accuracy and fiber bundle hanging on the mesh and sticking to the mesh, greatly improving the fiber separation and collection efficiency, controlling the problems of short flow and no flow in the inclined mesh filtration, improving the efficiency of resource recycling, and greatly reducing the load of subsequent wastewater treatment units.

[0035] like Figure 7The end of the collecting trough is provided with an auxiliary interface 17, which is connected to a faucet for flushing the working surface of the chute bottom plate 11; the smooth working surface of the chute bottom plate has a slope structure, and is provided with a collection port 16 for collecting fiber clusters. The fiber clusters can flow freely into the collection port 16 for collection. The collection port 16 is connected to the fiber storage tank, and a mechanical stirring device is installed in the fiber storage tank. The fiber clusters separated by the inclined mesh cloth have low moisture content and poor fluidity. The fiber collecting trough is made of stainless steel plates with a smooth surface to ensure the smoothness of the bottom of the trough. The chute bottom plate adopts a slope design along the direction of the collection port 16, which greatly enhances the fluidity of the fiber clusters in the collecting trough. An auxiliary interface 17 is designed at the starting end of the collecting trough, and a small amount of flushing water is used to flush the bottom of the collecting trough. The flushing and lubricating effect of a small amount of water flow greatly enhances the fluidity of the collected fiber clusters, ensuring that the fiber clusters can flow smoothly, so that the fiber clusters can automatically flow into the collection port 16 for collection, greatly saving the collection workload.

[0036] The fibers collected through the fiber trough are collected in the fiber storage tank. A mechanical stirring device is installed in the fiber storage tank to ensure the uniformity and fluidity of the fiber slurry, so that it does not deposit and block the pipeline and occupy the effective volume of the fiber trough. The fiber slurry can be directly transported to the production workshop for use. The slurry pump for conveying fiber slurry adopts an open impeller non-clogging pump. The pump impeller is polished with a knife edge and has cutting ability to prevent large fiber clumps or plastic clumps from clogging the water pump. The stable conveying system runs for a long time, and the operation is more stable and reliable, which improves the fiber slurry conveying efficiency. The slag removal port is set at the inlet and outlet of the slurry pump, which can be easily maintained and quickly restored to operation when the slurry pump is blocked.

[0037] In specific applications, wastewater containing a large amount of fiber material is first lifted to the main water distribution channel 2 at a high place by the water pump lifting channel 1, and the wastewater is evenly distributed through the orientation and flow rate of the water inlet main pipe. After the wastewater enters the control channel 4 from the main water distribution channel 2, it passes through the energy dissipation water distribution flower wall 5 and the water balancing plate 7 in the control channel 4 to prevent the water flow inertia from scouring the outlet weir, so that the wastewater can flow evenly along the long side of the control channel 4. After being distributed by the water balancing plate 7, the wastewater with a large amount of fiber material falls freely and evenly onto the inclined mesh cloth, effectively intercepting the fiber material in the wastewater and quickly agglomerating it into a mass. Under the action of the scouring force of the incoming water and the gravity of the fiber mass, the fiber mass rolls down along the inclined mesh cloth, realizing efficient separation of wastewater and fiber material.

[0038] In summary, the device of the present invention utilizes the interception effect of the dense inclined net to stably and efficiently separate the fiber impurities in the wastewater, solve the problem of wastewater pretreatment, and the separated fiber material can be automatically transported back to the workshop for recycling or reuse by gravity or pumping, so as to realize the resource utilization of waste. It reduces the processing load of the subsequent units of the sewage treatment station, stabilizes the operation of the sewage system, significantly improves the separation efficiency of fiber slurry, improves the benefits of waste resource utilization, has low energy consumption, and is a clean and low-energy environmental protection technology.

[0039] Through the reasonable design of the main distribution channel and the control channel and the rational distribution of hydraulic power, the wastewater is evenly distributed to multiple control channels for uniform water discharge, saving floor space. The uniform water distribution allows the wastewater to flow evenly through the inclined mesh water surface, making the fiber interception efficiency more stable and efficient. The high fiber recovery rate also optimizes the sewage treatment cost.

[0040] The fibers are efficiently retained on the surface of the inclined net, and under the action of water flushing and gravity, the fiber bundles are formed and roll down, with a high fiber retention rate. The fiber bundles retain a certain amount of moisture and are collected in the fiber collection tank. The whole process realizes the separation of pulp and water through gravity, without mechanical moving parts, low operating energy consumption, simple structure and low maintenance cost.

[0041] Fiber bundles with a certain moisture content are collected in the fiber collection tank, which is made of stainless steel plates with a smooth surface and is installed with a certain angle slope toward the fiber collection port. With a small amount of clean water flushing, most of the fiber bundles automatically slide into the fiber collection port. The whole process does not require manual operation, saving labor, and the fiber bundles are collected in time.

[0042] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and variations. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention. It should be noted that similar numbers and letters represent similar items in the following drawings. Therefore, once an item is defined in one drawing, it does not need to be further defined and explained in the subsequent drawings.

[0043] The above is only a specific implementation of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can easily think of changes or substitutions within the technical scope disclosed by the present invention, which should be covered by the protection scope of the present invention.

[0044] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, the elements defined by the sentence "comprise a ..." do not exclude the existence of other identical elements in the process, method, article or device including the elements.

Claims

1. A papermaking wastewater fiber recovery device, characterized in that: A main water distribution channel (2) located at a high position is connected to multiple control channels (4) below through a main water distribution hole (3) at the bottom. Two rows of vertical water distribution flower walls (5) are arranged in each control channel (4) along the length direction to separate the control channel (4) into a middle chamber and left and right chambers. The main water distribution hole (3) is directly opposite to the middle chamber. The bottom of the water distribution flower wall (5) has a flow passage (6) to connect the middle chamber with the left and right chambers. Vertical water equalizing plates (7) are installed at the weirs on both sides of the control channel (4). A grid frame (10) is arranged on the outside of the weir and tilted downward. A slanted mesh cloth is laid on the grid frame (10). A horizontal chute bottom plate (11) is arranged at the bottom end of the grid frame (10) along the length direction. A vertical chute baffle (12) is arranged on the extended outside of the chute bottom plate (11) along the length direction to form a collection tank for collecting fiber clusters.

2. The papermaking wastewater fiber recovery device according to claim 1, characterized in that: The water distribution plate (7) is provided with a plurality of adjustment holes or waist-shaped holes from bottom to top and is fixed to the weir mouth by bolts (8).

3. The papermaking wastewater fiber recovery device according to claim 1, characterized in that: A felt cloth (9) is laid in the area where the inclined mesh cloth transitions to the water outlet of the water distribution plate (7).

4. The papermaking wastewater fiber recovery device according to claim 1, characterized in that: The oblique mesh cloth is a nylon mesh cloth with a mesh size of 80 to 100.

5. The papermaking wastewater fiber recovery device according to claim 1, characterized in that: The grid (10) comprises a grid support frame (13), and a plurality of transverse ribs (14) evenly spaced in the transverse direction and a plurality of vertical ribs (15) evenly spaced in the vertical direction arranged thereon.

6. The papermaking wastewater fiber recovery device according to claim 1, characterized in that: The end of the collecting tank is provided with an auxiliary interface (17) which is equipped with a faucet for flushing the working surface of the chute bottom plate (11).

7. The papermaking wastewater fiber recovery device according to claim 1 or 6, characterized in that: The chute bottom plate (11) is made of stainless steel, and its smooth working surface has a sloped structure. A collecting port (16) for collecting fiber clusters is provided. The fiber clusters can freely flow into the collecting port (16) for collection. The collecting port (16) is connected to a fiber storage tank, and a mechanical stirring device is installed in the fiber storage tank.

8. The papermaking wastewater fiber recovery device according to claim 1, characterized in that: A lifting pipe (1) is arranged on the main water distribution channel (2), and the lifting pipe (1) is connected to a wastewater pipeline containing fibrous substances.

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