A printing and dyeing wastewater treatment equipment with filter cleaning function

Abstract

The present invention discloses a printing and dyeing wastewater treatment equipment with a filter screen cleaning function, including a sedimentation tank for treating wastewater, a partition is fixed inside the sedimentation tank, the partition divides the sedimentation tank into a physical treatment chamber and a biological treatment chamber, and a through hole for wastewater circulation is opened on the partition; a rotatable shaft is horizontally passed through the partition, and a motor for driving the shaft to rotate is installed on the upper end of the sedimentation tank; the shaft is divided into two parts by the partition, and a collector for filtering wastewater and a mixer for mixing wastewater are respectively provided on the two parts of the shaft. In the present invention, the suspended matter in the wastewater will be blocked by the filter strip, and the rotating filter strip changes the matching position with the through hole, so that the suspended matter is easily separated from the filter strip, and the outer fan plate pushes the wastewater toward the shaft, and the filter strip adheres to the suspended matter and moves into the annular opening, so that the suspended matter remains in the receiving box, thereby reducing the number of times the suspended matter is cleaned.

Description

Technical Field

[0001] The invention relates to the technical field of printing and dyeing, and in particular to printing and dyeing wastewater treatment equipment with a filter screen cleaning function. Background Art

[0002] Printing and dyeing wastewater has the characteristics of large water volume, high content of organic pollutants, high alkalinity, and large changes in water quality. Therefore, multi-stage treatment processes are often used to ensure its effective purification. The multi-stage treatment process of printing and dyeing wastewater usually includes pretreatment, physical treatment and biological treatment. Physical treatment generally uses sedimentation, filtration and other methods to further remove suspended matter and colloidal substances in wastewater, and uses the metabolism of microorganisms to remove organic pollutants in wastewater. Common biological treatment methods include activated sludge method, biological rotary drum, biological rotary drum and biological contact oxidation method.

[0003] When physically treating printing and dyeing wastewater, appropriate physical treatment equipment, such as screens, regulating tanks, sedimentation tanks, and filtration equipment, are selected based on the results of water quality analysis to remove large floating objects and suspended matter in the wastewater, such as cotton yarn and fiber scraps, to prevent subsequent treatment equipment from clogging. In the biological treatment process, appropriate mixing and aeration measures are required to ensure that organic matter in the wastewater is fully in contact with and degraded by microorganisms.

[0004] In a proper sedimentation tank, sewage is in a state of constant flow, which can easily drive the suspended matter in the sewage to move, causing the suspended matter to move to subsequent steps. When a filtration device is used, the suspended matter will clog the filtration equipment and need to be replaced regularly. When cleaning the blocked filtration equipment, a large amount of water is generally used for flushing, which will still cause the suspended matter to come into contact with water, further causing pollution. If a large amount of water is not used for cleaning, it is difficult to completely separate the suspended matter from the filtration equipment, and even if it can be separated from the filtration equipment, it is easy to break up the suspended matter and further pollute. Summary of the invention

[0005] The object of the present invention is to provide a printing and dyeing wastewater treatment device with a filter screen cleaning function to solve the problems raised in the above background technology.

[0006] In order to solve the above technical problems, the present invention provides the following technical solutions: a printing and dyeing wastewater treatment device with a filter screen cleaning function, comprising a sedimentation tank for treating wastewater, a partition is fixed inside the sedimentation tank, the partition divides the sedimentation tank into a physical treatment chamber and a biological treatment chamber, and a through hole for wastewater circulation is opened on the partition;

[0007] A rotatable shaft is horizontally passed through the partition, and a motor for driving the shaft to rotate is installed at the upper end of the sedimentation tank;

[0008] The rotating shaft is divided into two parts by a partition. A collector for filtering sewage and a mixer for mixing sewage are respectively arranged on the rotating shafts of the two parts. The collector is located in the physical treatment chamber, and the mixer is located in the biological treatment chamber.

[0009] Furthermore, the collector includes a fixed tube fixedly sleeved on the rotating shaft, a support frame is fixed to the outside of the fixed tube for support, a limiting ring layer is fixed to the end of the support frame, the limiting ring layer is adhered to the outside of the partition, and a filter strip distributed along the limiting ring layer is fixed to the inside of the limiting ring layer, and the filter strip blocks the opening.

[0010] Furthermore, the filter bars are perpendicular to the axis of the fixed pipe, and there are gaps between the filter bars and the spaced filter bars for sewage to pass through.

[0011] Furthermore, the through opening is arranged in an arc shape, and its axis coincides with the axis of the fixed tube, and when the filter strips distributed along the circumference of the limiting ring layer rotate, the filter strips at different positions cooperate with the through opening.

[0012] Furthermore, a receiving box is fixed on the inner side of the support frame, the receiving box is sleeved on the rotating shaft, one side of the receiving box is in contact with the partition, and the other side thereof is provided with a ventilation net, the ventilation net is used to filter the sewage, and the outer side of the receiving box is provided with an annular opening for the sewage to enter, and the annular opening is located on the inner side of the filter strip;

[0013] The outer side of the limiting ring layer is also fixed with fan plates distributed along its circumference, and the fan plates are used to drive sewage and suspended matter to move toward the annular opening.

[0014] Furthermore, the receiving box is circular, and the annular opening is located at the end of the filter rod.

[0015] Furthermore, the mixer includes a connecting pipe fixed on the outside of the rotating shaft, the end of the rotating shaft located on one side of the biological treatment chamber passes through the sedimentation tank, and the interior is hollow for the input of gas, the interior of the connecting pipe is connected to the interior of the rotating shaft, an upper opening is provided on the outside of the connecting pipe, a mixing plate for stirring the sewage is installed in the upper opening, extension edges are integrally provided on both sides of the connecting pipe, the mixing plate is fixed to the extension edges, an inner cavity is provided inside the mixing plate, the inner cavity is connected to the connecting pipe, and a through hole is provided on the outside of the mixing plate.

[0016] Furthermore, a connecting hole is opened on the inner wall of the through hole, and the connecting hole is used to connect the through hole and the inner cavity.

[0017] Compared with the prior art, the beneficial effects achieved by the present invention are:

[0018] 1. The suspended matter in the sewage will be blocked by the filter strip. The rotating filter strip changes its position with the port, and the suspended matter is easily separated from the filter strip. The outer fan plate pushes the sewage toward the shaft, and the filter strip adheres to the suspended matter and moves into the annular port, so that the suspended matter remains in the receiving box, reducing the number of times the suspended matter is cleaned.

[0019] 2. The filter strips are arranged in strips, with gaps between two adjacent filter strips, so that the suspended matter moves along the filter strips to avoid breaking up the suspended matter. It is easy to collect the suspended matter from the filter strips, avoiding repeated cleaning of the suspended matter, and will not affect the passage of sewage through the outlet.

[0020] 3. As the shaft rotates, the mixing plate mixes the sewage in the biological treatment chamber with the microorganisms and increases oxygen to degrade organic pollutants. The inner wall of the through hole is provided with a connection hole for gas output to achieve gas output. The stirring and bubble disturbance can enhance the mass transfer effect in the water body, that is, promote the diffusion and transmission of dissolved oxygen in the water body. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] The accompanying drawings are used to provide a further understanding of the present invention and constitute a part of the specification. Together with the embodiments of the present invention, they are used to explain the present invention and do not constitute a limitation of the present invention. In the accompanying drawings:

[0022] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0023] Figure 2 It is a schematic diagram of a semi-section structure of a sedimentation tank of the present invention;

[0024] Figure 3 It is a schematic diagram of the structure of the collector and mixer of the present invention;

[0025] Figure 4 It is a schematic diagram of the collector structure of the present invention;

[0026] Figure 5 It is a schematic diagram of the plane structure of the collector of the present invention;

[0027] Figure 6 It is a schematic diagram of the structure of the mixer of the present invention;

[0028] Figure 7 It is a schematic diagram of the local separation structure of the mixer of the present invention;

[0029] Figure 8 It is a schematic diagram of the local cross-sectional structure of the mixing plate of the present invention.

[0030] In the figure: 1. sedimentation tank; 2. partition; 21. physical treatment chamber; 22. biological treatment chamber; 23. through port; 3. motor; 4. rotating shaft; 5. collector; 51. fixed pipe; 52. support frame; 53. limiting ring layer; 54. filter strip; 55. fan plate; 56. receiving box; 57. ventilation net; 58. annular port; 6. mixer; 61. connecting pipe; 62. upper opening; 63. extended edge; 64. mixing plate; 641. inner cavity; 642. through hole; 643. connecting hole. DETAILED DESCRIPTION

[0031] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0032] See also Figure 1-Figure 8 The present invention provides a technical solution: printing and dyeing wastewater requires a multi-stage treatment process to effectively purify its high chroma, high organic matter content, complex chemical composition, heavy metal ions and large pH fluctuations. The first stage is physical treatment, adding coagulant to carry out flocculation reaction, removing part of suspended matter, colloid and part of dyes, and preliminarily reducing the chroma of wastewater. The second stage is biological treatment, hydrolyzing the refractory organic matter and converting it into biodegradable small molecules to improve the biodegradability of wastewater. The generated suspended matter needs to be treated. Based on this, a printing and dyeing wastewater treatment equipment with a filter cleaning function is proposed, including a sedimentation tank 1 for treating sewage, a partition 2 is fixed inside the sedimentation tank 1, and the partition 2 divides the sedimentation tank 1 into a physical treatment chamber 21 and a biological treatment chamber 22. The partition 2 is provided with a through hole 23 for sewage circulation. The sewage passes through the sedimentation tank 1, and the sewage is physically and biologically treated in the sedimentation tank 1, so that the sewage can further meet the discharge requirements, wherein the physical and biological treatments are separated by the partition 2, and the physical treatment is first carried out and then the biological treatment is carried out through the through hole 23;

[0033] A rotatable shaft 4 is horizontally passed through the partition 2, and a motor 3 for driving the shaft 4 to rotate is installed at the upper end of the sedimentation tank 1;

[0034] The rotating shaft 4 is divided into two parts by the partition 2. The two parts of the rotating shaft 4 are respectively provided with a collector 5 for filtering sewage and a mixer 6 for mixing sewage. The collector 5 is located in the physical treatment chamber 21, and the mixer 6 is located in the biological treatment chamber 22. The motor 3 is used to drive the rotating shaft 4 to rotate, and the rotating shaft 4 drives the collector 5 and the mixer 6 to work, so that the structure is compact and the sewage is treated, which is suitable for small printing and dyeing equipment.

[0035] like Figure 4 As shown, the sewage in the physical treatment chamber 21 needs to be filtered, and the sewage after filtering can be moved to the biological treatment chamber 22 for biological treatment. The collector 5 includes a fixed tube 51 fixedly sleeved on the rotating shaft 4, and a support frame 52 is fixed on the outer side of the fixed tube 51 for support. A limiting ring layer 53 is fixed at the end of the support frame 52, and the limiting ring layer 53 is attached to the outer side of the partition 2. The inner side of the limiting ring layer 53 is fixed with a filter strip 54 distributed along the limiting ring layer 53, and the filter strip 54 blocks the through-port 23. The fixed tube 51 is fixed to the rotating shaft 4 so that the fixed tube 51 can be rotated and can also be disassembled, so that the collector 5 can be removed and cleaned, and the filter strip 54 blocks the through-port 23, and the sewage entering into the through-port 23 is filtered, thereby achieving sewage filtration.

[0036] The filter strips 54 are all perpendicular to the axis of the fixed pipe 51 , and there is a gap between the filter strips 54 and the spaced filter strips 54 for sewage to pass through. It should be noted that the gap between two adjacent filter strips 54 is only used for sewage to pass through, and suspended matter will remain on the filter strips 54 .

[0037] like Figure 5 As shown, in order for the through port 23 to always maintain the filtering effect and prevent the filter strips 54 from being blocked by residual suspended matter, the through port 23 is arranged in an arc shape, and its axis coincides with the axis of the fixed tube 51. When the filter strips 54 distributed along the circumference of the limiting ring layer 53 rotate, the filter strips 54 at different positions cooperate with the through port 23, and the filter strips 54 can rotate. The filter strips 54 at different positions cooperate with the through port 23 to maintain the function of water circulation in the through port 23.

[0038] like Figure 4 and Figure 5 As shown, in order to collect the suspended matter remaining on the filter strip 54, the filter strip 54 needs to be cleaned, and a receiving box 56 is fixed to the inner side of the support frame 52. The receiving box 56 is sleeved on the rotating shaft 4. One side of the receiving box 56 is in contact with the partition 2, and the other side thereof is provided with a ventilation net 57. The ventilation net 57 is used to filter the sewage. An annular opening 58 for sewage to enter is provided on the outer side of the receiving box 56. The annular opening 58 is located on the inner side of the filter strip 54. The suspended matter on the filter strip 54 can move along the filter strip 54, so that the suspended matter moves into the annular opening 58 and accumulates in the receiving box 56, thereby realizing the collection of the suspended matter.

[0039] The outside of the limiting ring layer 53 is also fixed with fan plates 55 distributed along its circumference. The fan plates 55 are used to drive the sewage and suspended matter to move toward the annular opening 58. The fan plates 55 play a driving role, so that the suspended matter on the filter strip 54 moves along the filter strip 54. Due to the orientation of the filter strip 54, the suspended matter can move more smoothly, avoiding the suspended matter from being stuck on the filter strip 54.

[0040] like Figure 4 and Figure 5 As shown, the receiving box 56 is circular, and the annular opening 58 is located at the end of the filter strip 54, so as to ensure that the suspended matter moves into the annular opening 58 during movement, so as to collect the suspended matter.

[0041] like Figure 6 and Figure 7 As shown, it is necessary to treat the sewage in the biological treatment chamber 22, and use microorganisms to metabolize organic matter in the wastewater to convert the organic matter into harmless substances such as carbon dioxide, water and biomass. The mixer 6 includes a connecting pipe 61 fixed on the outside of the rotating shaft 4. The end of the rotating shaft 4 located on one side of the biological treatment chamber 22 passes through the sedimentation tank 1, and its interior is hollow for gas input. The interior of the connecting pipe 61 is connected to the interior of the rotating shaft 4. An upper opening 62 is provided on the outside of the connecting pipe 61. A mixing plate 64 for stirring the sewage is installed in the upper opening 62. Extended edges 63 are integrally provided on both sides of the connecting pipe 61. The mixing plate 64 is fixed to the extended edge 63. An inner cavity 641 is provided inside the mixing plate 64, and the inner cavity 641 is connected to the connecting pipe 61. A through hole 642 is provided on the outside of the mixing plate 64. During the rotation of the rotating shaft 4, the mixing plate 64 also rotates, and the microorganisms and the sewage are evenly mixed, so as to facilitate the conversion of organic matter in the sewage into harmless substances such as carbon dioxide, water and biomass.

[0042] like Figure 8 As shown, a connecting hole 643 is provided on the inner wall of the through hole 642, and the connecting hole 643 is used to connect the through hole 642 and the inner cavity 641. During the rotation of the mixing plate 64, the through hole 642 thereon is used for the passage of sewage. When the sewage passes through the through hole 642, the through hole 642 on the mixing plate 64 not only plays a role in circulation, but also increases the disturbance of the sewage by stirring. This disturbance helps to break the static state of the sewage and promote the flow and mixing of the sewage. The inner wall of the through hole 642 has a connecting hole 643 for gas output to realize the output of gas. The gas forms bubbles in the water. The rising and bursting process of the bubbles will produce strong disturbances, further promoting the mixing of sewage and the diffusion of dissolved oxygen.

[0043] The working principle of the present invention is as follows: the sewage generated by printing and dyeing passes through the sedimentation tank 1, and enters the biological treatment chamber 22 from the physical treatment chamber 21 through the through port 23. When the motor 3 drives the rotating shaft 4 to rotate, the fixed pipe 51, the support frame 52, the limiting ring layer 53 and the filter strip 54 also rotate accordingly. The filter strips 54 distributed along the circumference of the limiting ring layer 53 make different positions cooperate with the through port 23. When the sewage passes through the through port 23, the suspended matter in the sewage will be blocked by the filter strip 54 and relatively remain on the filter strip 54. It should be noted that when the sewage passes through the through port 23, it is in a self-flowing manner to avoid the turbulence of the sewage and cause The suspended matter passes through the filter strip 54 under the action of pressure. Even if the sewage flows from the physical treatment chamber 21 through the through port 23 into the biological treatment chamber 22 by itself, it still exerts pressure on the suspended matter blocked by the filter strip 54. Therefore, the rotating filter strip 54 changes its position with the through port 23, so that the suspended matter in this part can be easily separated from the filter strip 54. In the process of the outer fan plate 55 pushing the sewage toward the rotating shaft 4, the suspended matter adhered to the filter strip 54 can also move with it and move into the annular opening 58. The sewage in the receiving box 56 is filtered from the ventilation net 57, so that the suspended matter remains in the receiving box 56, thereby reducing the number of times the suspended matter is cleaned.

[0044] The filter strips 54 are arranged in strips, and there is a gap between two adjacent filter strips 54, which can make the suspended matter move along the filter strips 54, avoid breaking up the suspended matter, and easily collect the suspended matter from the filter strips 54, avoid cleaning the suspended matter multiple times, and will not affect the sewage passing through the opening 23. It should be noted that the suspended matter enters the receiving box 56 and can be accumulated in the receiving box 56, which reduces the number of cleaning times as much as possible, and relatively reduces the water flushing during cleaning.

[0045] When gas is introduced into the rotating shaft 4, the gas moves from the connecting pipe 61 to the inner cavity 641, and moves from the connecting hole 643 to the through hole 642. During the rotation of the rotating shaft 4, the mixing plate 64 mixes the sewage in the biological treatment chamber 22 with the microorganisms and adds oxygen, so that aerobic microbial cells can carry out biochemical reactions under the condition that dissolved oxygen molecules exist in the sewage, thereby degrading organic pollutants. The microorganisms absorb organic matter in the wastewater, carry out metabolic activities, and convert the organic matter into harmless substances such as carbon dioxide, water and biomass.

[0046] A gas output connection hole 643 is provided on the inner wall of the through hole 642 to realize the output of gas. The gas forms bubbles in the water. The rising and bursting process of the bubbles will produce strong disturbances, further promoting the mixing of sewage and the diffusion of dissolved oxygen. The stirring and disturbance of the bubbles can enhance the mass transfer effect in the water body, that is, promote the diffusion and transmission of dissolved oxygen in the water body.

[0047] 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.

[0048] Finally, it should be noted that the above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art can still modify the technical solutions described in the aforementioned embodiments or replace some of the technical features therein by equivalents. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A printing and dyeing wastewater treatment device with a filter cleaning function, comprising a sedimentation tank (1) for treating wastewater, characterized in that: A partition (2) is fixed inside the sedimentation tank (1), and the partition (2) divides the sedimentation tank (1) into a physical treatment chamber (21) and a biological treatment chamber (22). A through hole (23) for sewage circulation is provided on the partition (2); A rotatable shaft (4) is transversely passed through the partition (2), and a motor (3) for driving the shaft (4) to rotate is installed at the upper end of the sedimentation tank (1); The rotating shaft (4) is divided into two parts by a partition (2), and a collector (5) for filtering sewage and a mixer (6) for mixing sewage are respectively provided on the two parts of the rotating shaft (4), the collector (5) is located in the physical treatment chamber (21), and the mixer (6) is located in the biological treatment chamber (22); The collector (5) comprises a fixed tube (51) fixedly sleeved on the rotating shaft (4); a support frame (52) is fixed on the outer side of the fixed tube (51); a limiting ring layer (53) is fixed on the end of the support frame (52); the limiting ring layer (53) is attached to the outer side of the partition (2); and filter strips (54) distributed along the limiting ring layer (53) are fixed on the inner side of the limiting ring layer (53); the filter strips (54) block the opening (23); The filter strips (54) are all perpendicular to the axis of the fixed pipe (51), and there is a gap between the filter strips (54) and the spaced filter strips (54) for sewage to pass through; The through opening (23) is arranged in an arc shape, and its axis coincides with the axis of the fixed tube (51). When the filter strips (54) distributed along the circumference of the limiting ring layer (53) rotate, the filter strips (54) at different positions cooperate with the through opening (23); A receiving box (56) is also fixed on the inner side of the support frame (52), and the receiving box (56) is sleeved on the rotating shaft (4). One side of the receiving box (56) is in contact with the partition plate (2), and the other side thereof is provided with a ventilation net (57), and the ventilation net (57) is used to filter sewage. An annular opening (58) for sewage to enter is provided on the outer side of the receiving box (56), and the annular opening (58) is located on the inner side of the filter strip (54); The outer side of the limiting ring layer (53) is also fixed with fan plates (55) distributed along its circumference, and the fan plates (55) are used to drive sewage and suspended matter to move toward the annular opening (58).

2. The printing and dyeing wastewater treatment equipment with filter screen cleaning function according to claim 1 is characterized in that: The receiving box (56) is circular, and the annular opening (58) is located at the end of the filter strip (54).

3. The printing and dyeing wastewater treatment equipment with filter screen cleaning function according to claim 1 is characterized in that: The mixer (6) comprises a connecting pipe (61) fixed on the outside of the rotating shaft (4); the end of the rotating shaft (4) located on one side of the biological treatment chamber (22) passes through the sedimentation tank (1), and the interior thereof is hollow and is used for the input of gas; the interior of the connecting pipe (61) is communicated with the interior of the rotating shaft (4); an upper opening (62) is provided on the outside of the connecting pipe (61); a mixing plate (64) for stirring sewage is installed in the upper opening (62); two sides of the connecting pipe (61) are integrally provided with extended edges (63); the mixing plate (64) is fixed to the extended edges (63); an inner cavity (641) is provided inside the mixing plate (64); the inner cavity (641) is communicated with the connecting pipe (61); and a through hole (642) is provided on the outside of the mixing plate (64) that penetrates through.

4. The printing and dyeing wastewater treatment equipment with filter screen cleaning function according to claim 3 is characterized in that: A connecting hole (643) is provided on the inner wall of the through hole (642), and the connecting hole (643) is used to connect the through hole (642) and the inner cavity (641).

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