A multi-stage sewage treatment device for producing nitrocellulose

Abstract

The present application relates to sewage treatment technical field, especially sewage multi-stage processing device for nitration cotton production, including processing bucket and motor fixedly connected to the top end of processing bucket, the output end of motor is connected with rotating shaft, the bottom end of rotating shaft is rotatably arranged in processing bucket, the upper end of processing bucket is connected with liquid inlet pipe, the bottom end of processing bucket is connected with liquid outlet and residue outlet.The present application provides a kind of sewage multi-stage processing device for nitration cotton production, when rotating shaft counterclockwise rotates, will make cleaning scraper bar in outer filter sleeve or inner filter sleeve inner cavity disturbance, can prevent the impurities in liquid deposition, shorten the filtration time, when rotating shaft clockwise rotates, cleaning scraper bar can scrape the impurities on the inner wall of outer filter sleeve or inner filter sleeve, and when each limit knob is pressed in turn to extrusion slope, the air pressure of cavity surrounded by sliding plate and filter screen can be changed instantly, and the impurities adhered in mesh hole are discharged.

Description

Technical Field

[0001] This invention relates to the field of wastewater treatment technology, specifically to a multi-stage wastewater treatment device for nitrocellulose production. Background Technology

[0002] Nitrocellulose, also known as nitrocellulose, is a white or yellow cotton-like substance. It is obtained by esterifying refined cotton with concentrated nitric acid and concentrated sulfuric acid. It has a wide range of uses, including in the manufacture of paint, daily necessities, inks, and leather. In the production of nitrocellulose, wastewater is inevitably generated, and the treatment of this wastewater is extremely important. Improper treatment can cause significant environmental pollution. Therefore, a wastewater treatment system for nitrocellulose production was designed to treat the wastewater. Due to the large number of impurities in the wastewater, multi-stage filtration is required during the treatment process.

[0003] In existing devices, when processing fine particles, the fluid resistance generated by high-mesh screens increases exponentially, which slows down the filtration speed and affects the overall processing progress. Furthermore, most of the subsequent cleaning of impurities requires manual disassembly and cleaning, which is troublesome and reduces cleaning efficiency. Summary of the Invention

[0004] To address the aforementioned problems, this invention provides a multi-stage wastewater treatment device for nitrocellulose production.

[0005] This invention adopts the following technical solution: a multi-stage wastewater treatment device for nitrocellulose production, comprising a treatment tank and a motor fixed to the top of the treatment tank, wherein a rotating shaft is fixedly connected to the output end of the motor, the bottom end of the rotating shaft is rotatably disposed inside the treatment tank, an inlet pipe is connected to the upper end of the treatment tank, and a drain outlet and a slag outlet are connected to the bottom end of the treatment tank, and further comprising: An automatic opening and closing mechanism is provided inside the processing tank to automatically control the falling of debris by changing the direction of rotation. And an auxiliary cleaning mechanism for cleaning debris and agitating liquid, wherein the auxiliary cleaning mechanism is located within the automatic opening and closing mechanism.

[0006] As a further description of the above technical solution: the automatic opening and closing mechanism includes an outer filter sleeve located outside the rotating shaft. An inner filter sleeve is fixedly connected to the inner wall of the upper end of the outer filter sleeve. The inner filter sleeve is located between the outer filter sleeve and the rotating shaft. A connecting rod is fixedly connected between the top end of the inner filter sleeve and the rotating shaft. A first ring and a second ring are rotatably arranged at the bottom ends of the outer and inner filter sleeves, and the first and second rings are connected. A fixing rod is fixedly connected between the bottom end of the first ring and the processing tank. Ring 1 and Ring 2 are rotatably mounted on the outer wall of the rotating shaft. Ring 1 has slots at the top and bottom, and liquid-blocking ring blocks are inserted into the slots at the top and bottom. A lifting block is fixed to one end of the liquid-blocking ring block near the rotating shaft. The upper end of the lifting block is inserted into Ring 1 at the top and bottom. A spring is fixed to the upper end of the lifting block and the ring at the bottom. A pressing inclined surface is provided on the upper end of the lifting block. A rotating shaft is rotatably mounted inside the rotating shaft. A torsion spring is fixed to the outer wall of the rotating shaft and the rotating shaft. A limit block is fixed to the outer wall of the rotating shaft.

[0007] As a further description of the above technical solution: the auxiliary cleaning mechanism includes a cleaning scraper, which is fixedly connected to the liquid-blocking ring block. A sliding plate is slidably provided at the bottom end of the cleaning scraper. A second spring is fixedly connected between the upper end of the sliding plate and the cleaning scraper. A trigger cylinder is inserted into the upper end of the lifting block. A third spring is fixedly connected between the bottom end of the trigger cylinder and the lifting block. A pull rope is connected between the center of the bottom end of the trigger cylinder and the sliding plate. The cleaning scraper is in close contact with the first ring.

[0008] As a further description of the above technical solution: the middle part of the outer filter sleeve and the inner filter sleeve is a filter screen.

[0009] As a further description of the above technical solution: the limiting blocks are arranged in a ring with equal spacing.

[0010] As a further description of the above technical solution: the limiting block can only rotate clockwise.

[0011] As a further description of the above technical solution: both the first ring and the second ring are provided with liquid-blocking ring blocks.

[0012] As a further description of the above technical solution: the upper end of the trigger cylinder extends to the upper side of the extrusion slope.

[0013] This invention provides an improved multi-stage wastewater treatment device for nitrocellulose production, which has the following improvements and advantages compared with the prior art: Firstly, through the setting of automatic opening and closing mechanism and auxiliary cleaning mechanism, when the rotating shaft rotates counterclockwise, the centrifugal force can accelerate the sewage treatment speed, the liquid baffle block will block, and the rotation of the rotating shaft will cause the cleaning scraper to disturb the inner cavity of the outer or inner filter sleeve, which can prevent impurities in the liquid from settling, so that most impurities are filtered from the lower end of the outer or inner filter sleeve, preventing blockage and shortening the filtration time; Secondly, when the rotating shaft rotates clockwise, impurities and liquids in the inner cavities of the outer and inner filter sleeves can flow directly out from the bottom. The cleaning scraper can scrape off the impurities on the inner wall of the outer or inner filter sleeve. Furthermore, when each limit block presses against the extrusion slope in sequence, the sliding plate can move up and down periodically, thereby instantly changing the air pressure in the cavity surrounded by the sliding plate and the filter screen, and expelling the impurities adhering to the mesh. In summary, through the automatic opening and closing mechanism and the auxiliary cleaning mechanism, when the rotating shaft rotates counterclockwise, the centrifugal force can accelerate the sewage treatment speed, and the liquid-blocking ring block will block it. The rotation of the rotating shaft will cause the cleaning scraper to disturb the inner cavity of the outer or inner filter sleeve, which can prevent impurities in the liquid from settling, so that most impurities are filtered from the lower end of the outer or inner filter sleeve, preventing blockage and shortening the filtration time. When the rotating shaft rotates clockwise, impurities and liquid in the inner cavity of the outer and inner filter sleeves can flow directly from the lower side. The cleaning scraper can scrape off the impurities on the inner wall of the outer or inner filter sleeve. Furthermore, when each limit block presses against the squeezing inclined surface in sequence, the sliding plate can move up and down periodically, thereby instantly changing the air pressure in the cavity surrounded by the sliding plate and the filter screen, and discharging the impurities adhering to the mesh. Attached Figure Description

[0014] The present invention will be further explained below with reference to the accompanying drawings and embodiments: Figure 1 This is a schematic diagram of the structure of the present invention; Figure 2 This is a perspective sectional view of the processing tank provided in an embodiment of the present invention; Figure 3 A perspective sectional view of the outer filter sleeve and the inner filter sleeve provided in an embodiment of the present invention; Figure 4 This is a perspective sectional view of a circular ring provided in an embodiment of the present invention; Figure 5 A top sectional view of the rotating shaft provided in an embodiment of the present invention; Figure 6 This is a schematic diagram of the structure of the limiting block provided in an embodiment of the present invention; Figure 7 for Figure 4 Enlarged view of point A in the middle; Figure 8 for Figure 5Enlarged view of point B in the middle.

[0015] In the diagram: 1. Processing tank; 2. Motor; 3. Drain outlet; 4. Slag outlet; 5. Inlet pipe; 6. Automatic opening and closing mechanism; 61. Outer filter sleeve; 62. Inner filter sleeve; 63. Connecting rod; 64. Rotating shaft; 65. Fixed rod; 66. Ring 1; 67. Ring 2; 68. Lifting block; 69. Spring 1; 610. Liquid-blocking ring block; 611. Limiting block; 612. Rotating shaft; 613. Extrusion slope; 614. Torsion spring; 7. Auxiliary cleaning mechanism; 71. Cleaning scraper; 72. Sliding plate; 73. Spring 2; 74. Pull rope; 75. Trigger cylinder; 76. Spring 3. Detailed Implementation

[0016] To make the technical means, creative features, objectives, and effects of this invention readily understandable, the invention is further described below with reference to specific illustrations. It should be noted that, unless otherwise specified, the embodiments and features described in these embodiments can be combined with each other.

[0017] Please see Figure 1 - Figure 8 This invention provides a technical solution: a multi-stage wastewater treatment device for nitrocellulose production, comprising a treatment tank 1 and a motor 2 fixed to the top of the treatment tank 1. A rotating shaft 64 is fixed to the output end of the motor 2, and the bottom end of the rotating shaft 64 is rotatably disposed inside the treatment tank 1. An inlet pipe 5 is connected to the upper end of the treatment tank 1, and a drain outlet 3 and a slag outlet 4 are connected to the bottom end of the treatment tank 1. The device also includes: The automatic opening and closing mechanism 6 can automatically control the falling of debris by changing the rotation direction. The automatic opening and closing mechanism 6 is installed in the inner cavity of the processing tank 1. And an auxiliary cleaning mechanism 7, used to clean up debris and agitate liquid, is provided inside the automatic opening and closing mechanism 6.

[0018] Specifically, through the automatic opening and closing mechanism 6 and the auxiliary cleaning mechanism 7, when the rotating shaft 64 rotates counterclockwise, the centrifugal force can accelerate the sewage treatment speed, and the liquid-blocking ring block 610 will block it. The rotation of the rotating shaft 64 will cause the cleaning scraper 71 to disturb the inner cavity of the outer filter sleeve 61 or the inner filter sleeve 62, which can prevent impurities in the liquid from settling, so that most impurities are filtered from the lower end of the outer filter sleeve 61 or the inner filter sleeve 62, preventing blockage and shortening the filtration time. When the rotating shaft 64 rotates clockwise, the impurities and liquid in the inner cavity of the outer filter sleeve 61 and the inner filter sleeve 62 can flow directly from the lower side. The cleaning scraper 71 can scrape off the impurities on the inner wall of the outer filter sleeve 61 or the inner filter sleeve 62. When each limit block 611 presses the extrusion inclined surface 613 in sequence, the sliding plate 72 can move up and down periodically, thereby instantly changing the air pressure in the cavity surrounded by the sliding plate 72 and the filter screen, and discharging the impurities adhering to the mesh.

[0019] In another embodiment of the present invention, the automatic opening and closing mechanism 6 includes an outer filter sleeve 61, which is located outside the rotating shaft 64. An inner filter sleeve 62 is fixedly connected to the inner wall of the upper end of the outer filter sleeve 61. The inner filter sleeve 62 is located between the outer filter sleeve 61 and the rotating shaft 64. A connecting rod 63 is fixedly connected between the inner top of the inner filter sleeve 62 and the rotating shaft 64. A first ring 66 and a second ring 67 are rotatably arranged at the bottom ends of the outer filter sleeve 61 and the inner filter sleeve 62. The first ring 66 and the second ring 67 are connected. A fixing rod 65 is fixedly connected between the bottom end of the first ring 66 and the processing tank 1. The first ring 66 and the second ring 67 are connected. The second ring 67 is rotatably mounted on the outer wall of the rotating shaft 64. The first ring 66 has slots at the top and bottom, and the liquid-blocking ring blocks 610 are inserted into the slots at the top and bottom. The end of the liquid-blocking ring block 610 near the rotating shaft 64 is fixedly connected to the lifting block 68. The upper end of the lifting block 68 is inserted into the first ring 66 at the top and bottom. The upper end of the lifting block 68 is fixedly connected to the first ring 66 with the spring 69. The upper end of the lifting block 68 has a pressing inclined surface 613. The rotating shaft 612 is rotatably mounted inside the rotating shaft 64. The outer wall of the rotating shaft 612 is fixedly connected to the rotating shaft 64 with the torsion spring 614. The outer wall of the rotating shaft 612 is fixedly connected to the limit block 611.

[0020] The middle part of the outer filter sleeve 61 and the inner filter sleeve 62 is a filter screen.

[0021] The limit blocks 611 are arranged in a ring with equal spacing.

[0022] The limit block 611 can only rotate clockwise.

[0023] Both the first ring 66 and the second ring 67 are provided with liquid-retaining ring blocks 610.

[0024] Specifically, through the automatic opening and closing mechanism 6 and the auxiliary cleaning mechanism 7, when the rotating shaft 64 rotates counterclockwise, the centrifugal force can accelerate the sewage treatment speed, the liquid-blocking ring block 610 will block it, and the rotation of the rotating shaft 64 will cause the cleaning scraper 71 to disturb the inner cavity of the outer filter sleeve 61 or the inner filter sleeve 62, which can prevent impurities in the liquid from settling, so that most impurities are filtered from the lower end of the outer filter sleeve 61 or the inner filter sleeve 62, preventing blockage and shortening the filtration time.

[0025] In another embodiment of the present invention, the auxiliary cleaning mechanism 7 includes a cleaning scraper 71, which is fixedly connected to the liquid-blocking ring block 610. A sliding plate 72 is slidably disposed at the bottom end of the cleaning scraper 71. A second spring 73 is fixedly connected between the upper end of the sliding plate 72 and the cleaning scraper 71. A trigger cylinder 75 is inserted into the upper end of the lifting block 68. A third spring 76 is fixedly connected between the bottom end of the trigger cylinder 75 and the lifting block 68. A pull rope 74 is connected between the center of the bottom end of the trigger cylinder 75 and the sliding plate 72. The cleaning scraper 71 is in close contact with the first ring 66.

[0026] The upper end of the trigger cylinder 75 extends to the upper side of the extrusion slope 613.

[0027] Specifically, when the rotating shaft 64 rotates clockwise, impurities and liquids in the inner cavities of the outer filter sleeve 61 and the inner filter sleeve 62 can flow directly out from the bottom. The cleaning scraper 71 can scrape off the impurities on the inner wall of the outer filter sleeve 61 or the inner filter sleeve 62. When each limit block 611 presses against the extrusion slope 613 in sequence, the sliding plate 72 can move up and down periodically, thereby instantly changing the air pressure in the cavity surrounded by the sliding plate 72 and the filter screen, and expelling the impurities adhering to the mesh.

[0028] Working principle: During wastewater treatment, pretreatment is performed first to filter out large particles of solids. The pretreated wastewater is then introduced into the inner cavity of the inner filter sleeve 62 through the inlet pipe 5. Then, the motor 2 is started, driving the rotating shaft 64 to rotate. The rotating shaft 64 drives both the inner and outer filter sleeves 62 and 61 to rotate simultaneously. Due to centrifugal force, the liquid is accelerated and thrown from the inside of the inner filter sleeve 62 into the cavity between the outer and inner filter sleeves 61 for the first filtration. Then, due to centrifugal force, the liquid continues to be thrown from the inside of the outer filter sleeve 61 to the outside, and finally discharged from the outlet 3. This accelerates the wastewater treatment speed and prevents the high fluid resistance caused by the high-mesh screen from slowing down the filtration process and affecting the progress. When the moving shaft 64 rotates counterclockwise, the limiting block 611 is squeezed by the lifting block 68, and the limiting block 611 rotates clockwise. The lifting block 68 will not move downward, so the cleaning scraper 71 and the liquid-blocking ring block 610 are located on the upper side. Due to the blocking of the liquid-blocking ring block 610, the liquid in the inner cavity of the outer filter sleeve 61 and the inner filter sleeve 62 will not flow out directly. When the cleaning scraper 71 is located on the upper side, it can prevent the cleaning scraper 71 from contacting the inner wall of the outer filter sleeve 61 or the inner filter sleeve 62, thereby affecting the filtration speed. When the cleaning scraper 71 is disturbed in the inner cavity of the outer filter sleeve 61 or the inner filter sleeve 62, it can prevent impurities in the liquid from settling, so that most impurities are filtered from the lower end of the outer filter sleeve 61 or the inner filter sleeve 62, preventing blockage and shortening the filtration time. When cleaning the outer filter sleeve 61 and inner filter sleeve 62 is required, first fill the inlet pipe 5 with clean liquid, then simply rotate the rotating shaft 64 slowly in the reverse direction. At this time, when the rotating shaft 64 rotates clockwise, the limiting block 611 is squeezed by the squeezing inclined surface 613, and the limiting block 611 cannot rotate counterclockwise. As a result, the limiting block 611 will squeeze the inclined surface 613 downward. Then, the lifting block 68, the liquid-blocking ring block 610, and the cleaning scraper 71 all move downward. After the liquid-blocking ring block 610 moves downward, the impurities and liquid in the inner cavities of the outer filter sleeve 61 and inner filter sleeve 62 can flow directly out from the bottom. After the cleaning scraper 71 moves downward, the cleaning scraper... The bottom end of the rod 71 abuts against the outer filter sleeve 61 or the inner filter sleeve 62. When the cleaning scraper 71 rotates relative to the outer filter sleeve 61 or the inner filter sleeve 62, the cleaning scraper 71 can scrape off the impurities on the inner wall of the outer filter sleeve 61 or the inner filter sleeve 62. When each limiting block 611 presses against the extrusion inclined surface 613 in sequence, the limiting block 611 will trigger the cylinder 75 to press down, so that the sliding plate 72 can move up and down periodically, thereby instantly changing the air pressure in the cavity surrounded by the sliding plate 72 and the filter screen. Therefore, the impurities adhering to the mesh can be discharged, thereby improving the cleaning effect of the outer filter sleeve 61 and the inner filter sleeve 62.

[0029] The foregoing has shown and described the basic principles, main features, and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of the invention. Various changes and modifications can be made to the invention without departing from its spirit and scope, and all such changes and modifications fall within the scope of the present invention as claimed. The scope of protection of this invention is defined by the appended claims and their equivalents.

Claims

1. A multi-stage wastewater treatment device for nitrocellulose production, comprising a treatment tank (1) and a motor (2) fixed to the top of the treatment tank (1), wherein a rotating shaft (64) is fixed to the output end of the motor (2), the bottom end of the rotating shaft (64) is rotatably disposed inside the treatment tank (1), an inlet pipe (5) is connected to the upper end of the treatment tank (1), and a drain outlet (3) and a slag outlet (4) are connected to the bottom end of the treatment tank (1), characterized in that, Also includes: An automatic opening and closing mechanism (6) is provided in the inner cavity of the processing tank (1) to automatically control the falling of debris by changing the rotation direction. And an auxiliary cleaning mechanism (7) for cleaning debris and agitating liquid, wherein the auxiliary cleaning mechanism (7) is located within the automatic opening and closing mechanism (6).

2. The multi-stage wastewater treatment device for nitrocellulose production according to claim 1, characterized in that: The automatic opening and closing mechanism (6) includes an outer filter sleeve (61) located outside the rotating shaft (64). An inner filter sleeve (62) is fixedly connected to the inner wall of the upper end of the outer filter sleeve (61). The inner filter sleeve (62) is located between the outer filter sleeve (61) and the rotating shaft (64). A connecting rod (63) is fixedly connected between the top end of the inner filter sleeve (62) and the rotating shaft (64). A first ring (66) and a second ring (67) are rotatably arranged at the bottom ends of the outer filter sleeve (61) and the inner filter sleeve (62). The first ring (66) and the second ring (67) are connected to each other. A fixing rod (65) is fixedly connected between the bottom end of the first ring (66) and the processing tank (1). Rotary mounting is located on the outer wall of the rotating shaft (64). The first ring (66) has slots at the top and bottom, and a liquid-blocking ring block (610) is inserted into the slots at the top and bottom. A lifting block (68) is fixedly connected to one end of the liquid-blocking ring block (610) near the rotating shaft (64). The upper end of the lifting block (68) is inserted into the first ring (66) at the top and bottom. A spring (69) is fixedly connected between the upper end of the lifting block (68) and the first ring (66). A pressing inclined surface (613) is provided at the upper end of the lifting block (68). A rotating shaft (612) is rotatably mounted inside the rotating shaft (64). A torsion spring (614) is fixedly connected between the outer wall of the rotating shaft (612) and the rotating shaft (64). A limit block (611) is fixedly connected to the outer wall of the rotating shaft (612).

3. The multi-stage wastewater treatment device for nitrocellulose production according to claim 2, characterized in that: The auxiliary cleaning mechanism (7) includes a cleaning scraper (71), which is fixedly connected to the liquid-blocking ring block (610). A sliding plate (72) is slidably provided at the bottom end of the cleaning scraper (71). A spring (73) is fixedly connected between the upper end of the sliding plate (72) and the cleaning scraper (71). A trigger cylinder (75) is inserted into the upper end of the lifting block (68). A spring (76) is fixedly connected between the bottom end of the trigger cylinder (75) and the lifting block (68). A pull rope (74) is connected between the center of the bottom end of the trigger cylinder (75) and the sliding plate (72). The cleaning scraper (71) is in close contact with the ring (66).

4. The multi-stage wastewater treatment device for nitrocellulose production according to claim 2, characterized in that: The middle part of the outer filter sleeve (61) and the inner filter sleeve (62) is a filter screen.

5. A multi-stage wastewater treatment device for nitrocellulose production according to claim 2, characterized in that: The limiting blocks (611) are arranged in a ring with equal spacing.

6. A multi-stage wastewater treatment device for nitrocellulose production according to claim 2, characterized in that: The limiting block (611) can only rotate clockwise.

7. A multi-stage wastewater treatment device for nitrocellulose production according to claim 2, characterized in that: Both the first ring (66) and the second ring (67) are provided with liquid-blocking ring blocks (610).

8. A multi-stage wastewater treatment device for nitrocellulose production according to claim 3, characterized in that: The upper end of the trigger cylinder (75) extends to the upper side of the extrusion slope (613).

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