Wastewater treatment equipment and method for starch sugar production process

Abstract

The present invention discloses a wastewater treatment device and method for the starch sugar production process, which belongs to the technical field of starch sugar production wastewater treatment. It mainly includes a shell, the shell includes an inner shell and an outer shell, a drain valve is fixedly installed at the bottom of the outer shell, a fixed frame is fixedly connected to the top of the inner shell, a power mechanism is fixedly arranged on the fixed frame, a scum collection mechanism is arranged on the outer wall of the top of the inner shell, a cleaning chamber is fixedly arranged at the bottom of the inner shell, a sewage pipe is extended outward from the side wall of the cleaning chamber, a cleaning mechanism is fixedly arranged on the cleaning chamber, a filter chamber is fixedly arranged on the upper part of the cleaning chamber, a rotating filter screen is rotatably connected in the filter chamber, and an aeration disk is fixedly arranged on the top of the filter chamber. The present invention promotes rapid and efficient mixing of wastewater and flocculant by setting a power mechanism, when the driving motor rotates forward and rapidly, when the driving motor rotates in the reverse direction and slowly, aeration operation is performed in cooperation with the aeration disk to remove soluble organic matter in the wastewater. The present invention is mainly used for treating wastewater from starch sugar production.

Description

Technical Field

[0001] The invention belongs to the technical field of wastewater treatment in starch sugar production, and in particular, relates to a wastewater treatment device and method used in the starch sugar production process. Background Art

[0002] In recent years, a large amount of wastewater has been generated in the process of starch sugar production. Since the wastewater generated in the process of starch sugar production contains a large amount of fiber impurities and organic matter such as protein and sugar, traditional wastewater treatment methods cannot efficiently and professionally treat starch sugar production wastewater.

[0003] A Chinese patent with publication number "CN212954645U" discloses a water treatment device for starch sugar, including a wastewater inlet, the right end of which passes through a water treatment device and is connected to a grid pool, a grid net is provided at the upper end of the grid pool, a flocculation device is provided at the lower end of the grid net, a filter net is provided at the lower end of the flocculation device, an aeration tank is provided at the right end of the grid pool, a filter cover is provided at the upper end of the aeration tank, a blower is fixedly installed at the upper end of the water treatment device, an exhaust pipe is fixed at the lower end of the blower, and an aerator is provided at the lower end of the exhaust pipe to realize the function of treating wastewater after starch sugar processing.

[0004] During its later use, the device still had the following problems: the equipment occupied a large space; the flocculation efficiency was too slow, affecting the speed of wastewater treatment; and a large amount of scum and foam was generated after the aeration operation, which was difficult to clean up. Summary of the invention

[0005] The technical problem to be solved by the present invention is: to overcome the shortcomings of the prior art and provide a wastewater treatment equipment and method for the starch sugar production process, which, by setting a power mechanism, promotes rapid and efficient mixing of wastewater and flocculant when the driving motor rotates forward and rapidly, and removes flocculated sediments at the same time; when the driving motor rotates reversely and slowly, it cooperates with the aeration disk to perform aeration operation to remove soluble organic matter in the wastewater, and at the same time, the scum collection mechanism filters and collects the foam and scum gathered on the top of the wastewater.

[0006] The wastewater treatment equipment used in the starch sugar production process comprises a shell, which comprises an inner shell and an outer shell. The inner shell and the outer shell are fixedly connected at the bottom with a leg. A drain valve is fixedly installed at the bottom of the outer shell. A fixing frame is fixedly connected to the top of the inner shell. A power mechanism is fixedly arranged on the fixing frame. A scum collecting mechanism is arranged on the outer wall of the top of the inner shell. The scum collecting mechanism cooperates with the power mechanism. A scum outlet is fixedly arranged at the bottom of the fixing frame. The scum outlet cooperates with the scum collecting mechanism. A connecting port is fixedly arranged at the lower part of the scum outlet. A cleaning chamber is fixedly arranged at the bottom of the inner shell. A sewage pipe extends outward from the side wall of the cleaning chamber. A cleaning mechanism is fixedly arranged on the cleaning chamber. A connecting pipe is fixedly arranged at the center of the cleaning chamber. A filter chamber is fixedly arranged at the upper part of the cleaning chamber. A rotating filter screen is rotatably connected in the filter chamber. The rotating filter screen cooperates with the cleaning mechanism. An aeration disk is fixedly arranged on the top of the filter chamber. An air inlet pipe extends outward from the aeration disk. A plurality of aeration holes are fixedly arranged on the side wall of the aeration disk. A vertical through pipe is fixedly arranged in the middle of the top of the filter chamber.

[0007] Preferably, the power mechanism includes a driving motor, which is fixedly connected to the middle of the top of the fixed frame, and an inner rotating seat is fixedly connected to the middle bottom of the fixed frame. A transmission shaft is provided at the center of the inner rotating seat, and the transmission shaft is fixedly connected to the output shaft of the driving motor. A gear ring is fixedly provided on the upper side wall of the transmission shaft, and an upper turbine and a lower turbine are fixedly connected to the lower side wall of the transmission shaft. The upper turbine is located at the upper part of the filter chamber, and the lower turbine is located at the lower part of the filter chamber. The upper turbine cooperates with the vertical through pipe, and the lower turbine cooperates with the connecting pipe. A sliding rod is fixedly connected to the outer side of the inner rotating seat, and a connecting slider is slidably connected to the sliding rod. The outer side of the sliding rod is fixedly connected to the outer rotating seat, the inner rotating seat is rotatably connected to a coaxial reduction inner cylinder, and the outer rotating seat is rotatably connected to a coaxial reduction outer cylinder.

[0008] Preferably, the outer wall of the coaxial reduction inner cylinder is fixedly connected with a driving guide rail, a rotating cavity is fixedly opened inside the coaxial reduction inner cylinder, a fixed rod is fixedly connected inside the rotating cavity, a torsion spring is fixedly connected to the fixed rod, and the other end of the torsion spring is fixedly connected with a one-way tooth, the one-way tooth is rotatably connected to the fixed rod, the one-way tooth cooperates with the gear ring, a driving groove is fixedly opened on the outer wall of the coaxial reduction outer cylinder, a driven bending groove is fixedly opened on the inner wall of the coaxial reduction outer cylinder, the outer end of the connecting slider is fixedly connected to a limiting pin 1, and the inner end of the connecting slider is fixedly opened with a limiting slot, the limiting pin 1 cooperates with the driven bending slot, and the limiting slot cooperates with the driving guide rail.

[0009] Preferably, the scum filter collection mechanism includes a scum filter cartridge and a water sealing baffle, the scum filter cartridge is slidably connected to the outer wall of the top of the inner shell, the outer wall of the scum filter cartridge is fixedly connected to a scum discharge gate, the inside of the scum filter cartridge is fixedly connected to a filter ring, the top of the filter ring is fixedly connected to multiple groups of pressure plates, the top of the scum filter cartridge is fixedly connected to a connecting plate, the center of the connecting plate is fixedly provided with an opening, the opening is in sliding contact with the outer wall of the coaxial reduction outer cylinder, a limit pin two is fixedly connected on the inner wall of the opening, the limit pin two cooperates with the driving groove, a sliding hole is fixedly provided on the outer side of the connecting plate, the sliding hole is slidably connected to the fixed frame, the water sealing baffle is slidably connected to the inner wall of the top of the inner shell, the top of the water sealing baffle cooperates with the pressure plate, the inner wall of the top of the water sealing baffle is fixedly connected with a compression spring, the other end of the compression spring is fixedly connected to the bottom of the scum outlet, the water sealing baffle extends outwardly with a sealing outer plate, and the sealing outer plate cooperates with the inner wall of the filter ring.

[0010] Preferably, the cleaning mechanism includes an inner shield, an outer shield, a brush rod and a scraper. The inner shield and the outer shield are fixedly connected to the bottom of the filter chamber, the bottoms of the inner shield and the outer shield are connected to the cleaning chamber, the brush rod and the scraper are fixedly connected to the bottom of the cleaning chamber, and the brush rod and the scraper are matched with the inner shield.

[0011] Preferably, a filter is fixedly provided on the outside of the rotating filter, the outer wall of the filter cooperates with the outer baffle cover, the inner wall of the filter cooperates with the inner baffle cover, a fan ring is fixedly connected to the center of the rotating filter, and the inner wall of the filter cooperates with the brush rod and the scraper.

[0012] Preferably, a treatment method using a wastewater treatment device in a starch sugar production process comprises the following steps:

[0013] a: Pour the starch sugar production wastewater into the inner shell, add an appropriate amount of flocculant, start the drive motor and rotate it at high speed to stir and mix the wastewater and flocculant to achieve the treatment of insoluble organic matter and limited impurities;

[0014] b: The flocculated sediment is filtered by the rotating filter screen, and the flocculated sediment on the rotating filter screen is then cleaned into the cleaning chamber by the cleaning mechanism, and the flocculated sediment is discharged from the sewage pipe;

[0015] c: Adjust the driving motor to rotate slowly in the reverse direction, and introduce air into the air inlet pipe to perform aeration operation to achieve the treatment of dissolved organic matter. At the same time, the scum and froth flow into the scum filter cartridge 301 with the water flow, and are filtered and collected by the scum filter cartridge 301. The froth and froth are finally discharged from the scum discharge gate 301A.

[0016] Compared with the prior art, the present invention has the following beneficial effects:

[0017] 1. By setting a power mechanism, when the driving motor rotates forward and quickly, the wastewater and flocculant are mixed quickly and efficiently. At the same time, the water flows unidirectionally from bottom to top in the inner shell and is filtered by the rotating filter during the flow process to remove the flocculated sediment. When the driving motor rotates in the reverse direction and slowly, the water flows slowly from top to bottom in the inner shell and cooperates with the aeration disk to perform aeration operations to remove soluble organic matter in the wastewater, avoiding the problem of uneven aeration effects between the upper and lower wastewater. At the same time, the scum collection mechanism filters and collects the froth and scum gathered on the top of the wastewater;

[0018] 2. By setting up a scum collection mechanism, the scum filter cartridge moves downward and is lower than the water surface, and the water flow carries the scum and foam into the scum filter cartridge. The scum filter cartridge moves upward and is higher than the water surface, and the filter ring blocks and filters the scum and foam. Compared with the traditional rotary scraper device, which is only suitable for processing large and concentrated amounts of scum and foam, this device can achieve a better cleaning effect on smaller particles of scum;

[0019] 3. By setting the aeration holes on the aeration plate on the side of the aeration plate, the gas has a certain lateral inertia when it is ejected, and the gas will also have a certain horizontal displacement during the floating process, which is convenient for the rapid diffusion of the gas, increases the contact area between the gas and the wastewater, and improves the aeration effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0021] Figure 2 It is a schematic diagram of the internal structure of the present invention;

[0022] Figure 3 is a schematic diagram of the internal structure of the shell;

[0023] Figure 4 It is a schematic diagram of the structure of the transmission shaft;

[0024] Figure 5 It is a structural schematic diagram of the slag collection mechanism;

[0025] Figure 6 It is the structural explosion diagram of the slag collection mechanism;

[0026] Figure 7 It is a partial structural diagram of the power mechanism;

[0027] Figure 8 It is a structural schematic diagram of connecting sliders;

[0028] Fig. 9 It is a structural schematic diagram of a coaxial reduction outer cylinder and a coaxial reduction inner cylinder;

[0029] Fig.10It is a schematic diagram of the internal structure of the coaxial reduction outer cylinder and the coaxial reduction inner cylinder;

[0030] Fig.11 It is a structural explosion diagram of the coaxial reduction outer cylinder and the coaxial reduction inner cylinder;

[0031] Fig.12 It is a structural schematic diagram of a rotary filter;

[0032] Fig.13 Schematic diagram of the internal structure of the filter chamber;

[0033] Fig.14 It is a schematic diagram of the internal structure of the filter chamber and the cleaning chamber;

[0034] Fig.15 A schematic diagram of the aeration plate structure.

[0035] In the figure, 1, shell; 101, inner shell; 101A, fixing frame; 101B, scum outlet; 101C, connecting port; 102, outer shell; 103, drain valve; 104, leg; 105, cleaning chamber; 105A, sewage pipe; 105B, connecting pipe; 106, filter chamber; 107, vertical pipe; 2, power mechanism; 201, driving motor; 202, transmission shaft; 202A, gear ring; 202B, upper turbine; 202C, lower turbine; 203, slide bar; 204, connecting slide block; 204A, limit pin 1; 204B, limit notch; 205, coaxial reduction inner cylinder; 205A, driving guide rail; 205B, rotating chamber; 205C, fixed rod; 205D, torsion spring; 205E, one-way clamping gear; 206, coaxial reduction outer cylinder; 206A, driving groove; 206B, driven bending groove; 207, inner rotating seat; 208, outer rotating seat; 3, scum collecting mechanism; 301, scum filter cartridge; 301A, scum discharge gate; 301B, filter ring; 301C, pressure plate; 301D, connecting plate; 301E, opening; 301F, sliding hole; 301G, limit pin 2; 302, water sealing baffle; 302A, sealing outer plate; 303, compression spring; 4, rotating filter screen; 401, filter screen; 402, fan ring; 5, cleaning mechanism; 501, inner baffle cover; 502, outer baffle cover; 503, brush rod; 504, scraper; 6, aeration plate; 601, air inlet pipe; 602, aeration hole. DETAILED DESCRIPTION

[0036] The present invention will be further described below in conjunction with the accompanying drawings:

[0037] The directional nouns involved in the detailed description paragraphs are only for the convenience of those skilled in the art to understand the technical solutions described in this application according to the visual orientation shown in the accompanying drawings. Unless otherwise clearly specified and limited, the terms "setting", "installation", "connection", etc. should be understood in a broad sense. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to the specific circumstances.

[0038] like Figure 1 , Figure 2 and Figure 3 As shown, a wastewater treatment device used in the starch sugar production process includes a shell 1, the shell 1 includes an inner shell 101 and an outer shell 102, and there is a cavity between the inner shell 101 and the outer shell 102 for the flow of wastewater; the inner shell 101 and the outer shell 102 are fixedly connected at the bottom with a support leg 104, and the stop 104 supports and fixes the bottom of the inner shell 101 and the outer shell 102; a drain valve 103 is fixedly installed at the bottom of the outer shell 102, and most of the organic matter and fiber impurities are removed from the wastewater after flocculation and aeration treatment, and the purified water can be directly discharged from the drain valve 103; a fixing frame 101A is fixedly connected to the top of the inner shell 101, and a power mechanism 2 is fixedly arranged on the fixing frame 101A. By setting the power mechanism 2, when the drive motor 201 rotates forward and rapidly, the upper turbine 202B and the lower turbine 202C pump the wastewater into the water. The wastewater is pushed and stirred, and the wastewater is impacted and collided in the filter chamber 106, which promotes the rapid and efficient mixing of the wastewater and the flocculant again. At the same time, the water flows unidirectionally from bottom to top in the inner shell 101 and is filtered by the rotating filter screen 4 during the flow process to remove the flocculated sediment. When the driving motor 201 rotates in the reverse direction and slowly, the upper turbine 202B and the lower turbine 202C push the wastewater in the opposite direction, so that the water flows slowly from top to bottom in the inner shell 101, and cooperates with the aeration disk 6 to perform aeration operation to remove soluble organic matter in the wastewater. Since the water flows slowly downward, the microorganisms in the wastewater can be more evenly and efficiently exposed to oxygen and consume organic matter, avoiding the problem of uneven aeration effect of the upper and lower wastewater. At the same time, the power mechanism 2 can drive the scum collection mechanism 3 to filter and collect the scum and scum collected on the top of the wastewater;

[0039] The top outer wall of the inner shell 101 is provided with a scum collecting mechanism 3, which cooperates with the power mechanism 2. By setting the scum collecting mechanism 3, the scum filter cartridge 301 moves downward and is lower than the water surface, and the water flow carries the scum and foam into the scum filter cartridge 301, and the scum filter cartridge 301 moves upward and is higher than the water surface, and the filter ring 301B blocks and filters the scum and foam, and the wastewater flows back to the inner shell 101 after being filtered again, and moves up and down in a cycle to complete the filtration and collection of the scum and foam generated by the aeration operation. The mechanism can collect and filter the scum and foam floating on the upper layer of the wastewater. Compared with the conventional device of scraping and skimming with a rotary scraper, the rotary scraper pushes the foam and scum to the edge and scrapes them out by rotating on the water surface to complete the cleaning. However, this method is only suitable for processing the situation where the amount of foam and scum is large and concentrated, and the cleaning effect is poor for the scum with smaller particles. A scum outlet 101B is fixedly provided at the bottom of the fixed frame 101A. The scum outlet 101B cooperates with the scum collecting mechanism 3. When the scum filter cartridge 301 moves downward to below the water surface, the water flow and scum foam flow into the scum filter cartridge 301 through the scum outlet 101B.

[0040] A communication port 101C is fixedly provided at the lower part of the scum outlet 101B, and a cleaning chamber 105 is fixedly provided at the bottom of the inner shell 101. By providing the cleaning chamber 105 and the cleaning mechanism 5, the flocculated sediment attached to the inner wall of the rotating filter screen 4 is cleaned off, ensuring that the rotating filter screen 4 can filter the flocculated sediment at the most efficient speed for a long time. At the same time, the provision of the inner baffle 501 and the outer baffle 502 can also avoid the situation where the flocculated sediment is difficult to clean due to the impact of the water flow on the inner wall of the rotating filter screen 4, thereby improving the cleaning effect; a sewage pipe 105A is extended outward from the side wall of the cleaning chamber 105, and the cleaned flocculated sediment is discharged from the sewage pipe 105A;

[0041] A cleaning mechanism 5 is fixedly provided on the cleaning chamber 105, a connecting pipe 105B is fixedly provided at the center of the cleaning chamber 105, a filter chamber 106 is fixedly provided on the upper part of the cleaning chamber 105, a rotating filter screen 4 is rotatably connected in the filter chamber 106, and when the water flow impacts and collides at the center of the filter chamber 106, it will spread to the west and flush the fan ring 402, and the rotating filter screen 4 will rotate, so that the flocculants just adhering to the filter screen 401 can be cleaned off in time, thereby increasing the filtering speed; the rotating filter screen 4 cooperates with the cleaning mechanism 5, and an aeration plate 6 is fixedly provided on the top of the filter chamber 106, and the aeration holes 602 on the aeration plate 6 are arranged on the side of the aeration plate 6, so that the gas has a certain lateral inertia when it is ejected, and the gas will also have a certain horizontal displacement during the floating process, which is convenient for the rapid diffusion of the gas, increases the contact area between the gas and the wastewater, and improves the aeration effect; Fig.15 As shown, the aeration plate 6 has an air inlet pipe 601 extending outward, a plurality of aeration holes 602 are fixedly provided on the side wall of the aeration plate 6 , and a vertical through pipe 107 is fixedly provided in the middle of the top of the filter cavity 106 .

[0042] like Figure 4 , Figure 7 and Figure 8 As shown, the power mechanism 2 includes a driving motor 201, which is fixedly connected to the middle of the top of the fixing frame 101A, and an inner rotating seat 207 is fixedly connected to the middle bottom of the fixing frame 101A. A transmission shaft 202 is arranged at the center of the inner rotating seat 207, and the transmission shaft 202 is fixedly connected to the output shaft of the driving motor 201. A gear ring 202A is fixedly arranged on the upper side wall of the transmission shaft 202, and an upper turbine 202B and a lower turbine 202C are fixedly connected to the lower side wall of the transmission shaft 202. The upper turbine 202B is located at the upper part of the filter chamber 106, and the lower turbine 202C is located at the lower part of the filter chamber 106. The upper turbine 202B is connected to the vertical pipe 106. 7, the lower turbine 202C cooperates with the connecting pipe 105B. When the driving motor 201 rotates forward, the upper turbine 202B and the lower turbine 202C pump the wastewater to the filter chamber 106, so that the two water flows coming out of the vertical pipe 107 and the connecting pipe 105B collide and impact, promoting the mixing of the wastewater and the flocculant. When the driving motor 201 rotates forward, the faster the speed, the faster the flocculation operation speed, and the better the flocculation operation effect; the outer side of the inner rotating seat 207 is fixedly connected with a sliding rod 203, and the sliding rod 203 is slidably connected with a connecting slider 204, and the connecting slider 204 slides vertically on the sliding rod 203;

[0043] The outer side of the slide bar 203 is fixedly connected with an outer rotating seat 208, the inner rotating seat 207 is rotatably connected with the coaxial reduction inner cylinder 205, and the outer rotating seat 208 is rotatably connected with the coaxial reduction outer cylinder 206. The power of the driving motor 201 is transmitted to the coaxial reduction inner cylinder 205 through the transmission shaft 202, and the coaxial reduction inner cylinder 205 converts the rotation of the transmission shaft 202 into repeated sliding of the connecting slider 204, and the repeated sliding of the connecting slider 204 can drive the coaxial reduction outer cylinder 206 to rotate. When the driving motor 201 rotates in the reverse direction, the power of the transmission shaft 202 can be transmitted to the coaxial reduction inner cylinder 205. The rotation speed of the coaxial reduction inner cylinder 205 is relatively fast. Through the transmission of the connecting slider 204, the rotation speed of the coaxial reduction outer cylinder 206 is slowed down, thereby driving the scum filter cylinder 301 to slowly shake up and down to clean the scum.

[0044] like Fig. 9 , Fig.10 and Fig.11As shown, the outer wall of the coaxial reduction inner cylinder 205 is fixedly connected with a driving guide rail 205A, and a rotating chamber 205B is fixedly opened inside the coaxial reduction inner cylinder 205. A fixed rod 205C is fixedly connected in the rotating chamber 205B. A torsion spring 205D is fixedly connected to the fixed rod 205C. The other end of the torsion spring 205D is fixedly connected with a one-way clamping tooth 205E. The one-way clamping tooth 205E is rotatably connected to the fixed rod 205C. The one-way clamping tooth 205E cooperates with the gear ring 202A. The torsion spring 205D turns the one-way clamping tooth 205E to make it contact with the gear ring 202A. When the gear ring 202A rotates forward, it cannot be driven. The coaxial reduction inner cylinder 205 is driven. When the ring gear 202A rotates in the opposite direction, the one-way clamping tooth 205E clamps the ring gear 202A, and the power of the transmission shaft 202 is transmitted to the coaxial reduction inner cylinder 205. The outer wall of the coaxial reduction outer cylinder 206 is fixedly provided with a driving groove 206A, and the inner wall of the coaxial reduction outer cylinder 206 is fixedly provided with a driven curved groove 206B. The outer end of the connecting slider 204 is fixedly connected to a limiting pin 204A, and the inner end of the connecting slider 204 is fixedly provided with a limiting slot 204B. The limiting pin 204A cooperates with the driven curved slot 206B, and the limiting slot 204B cooperates with the driving guide rail 205A.

[0045] The driven curved groove 206B is arranged on the inner wall of the coaxial reduction outer cylinder 206, and the number of its curved sections is the same as the multiple of the reduction of the coaxial reduction outer cylinder 206 relative to the coaxial reduction inner cylinder 205. When the driven curved groove 206B is bent by five sections, the connecting slider 204 needs to slide vertically back and forth five times to drive the coaxial reduction outer cylinder 206 to rotate a full circle; when the driven curved groove 206B is bent by N sections, the coaxial reduction inner cylinder 205 follows the transmission shaft 202 to rotate a full circle, and the driving guide rail 205A will drive the connecting slider 204 to make a set of vertical back and forth movements, thereby driving the coaxial reduction outer cylinder 206 to rotate one Nth of a full circle. Therefore, only when the coaxial reduction inner cylinder 205 rotates N circles can it drive the coaxial reduction outer cylinder 206 to rotate a full circle, thereby driving the scum collecting mechanism 3 to complete a set of up and down movements to filter the scum once.

[0046] like Figure 5 and Figure 6As shown, the scum collecting mechanism 3 includes a scum filter cartridge 301 and a water sealing baffle 302. The scum filter cartridge 301 is slidably connected to the outer wall of the top of the inner shell 101. A scum discharge gate 301A is fixedly connected to the outer wall of the scum filter cartridge 301. The accumulated foam and scum in the scum filter cartridge 301 are discharged from the scum discharge gate 301A. A filter ring 301B is fixedly connected to the inside of the scum filter cartridge 301. A plurality of groups of pressure plates 301C are fixedly connected to the top of the filter ring 301B. A connecting plate 301D is fixedly connected to the top of the scum filter cartridge 301. An opening 301E is fixedly opened in the center of the connecting plate 301D. The opening 301E is in sliding contact with the outer wall of the coaxial reduction outer cylinder 206. A limiting pin 2 301G is fixedly connected to the inner wall of the opening 301E. The limiting pin 2 301 G cooperates with the driving groove 206A, and a sliding hole 301F is fixedly opened on the outer side of the connecting plate 301D. The sliding hole 301F is slidably connected to the fixing frame 101A. Through the cooperation between the fixing frame 101A and the sliding hole 301F, the scum filter cartridge 301 is circumferentially limited, and the scum filter cartridge 301 is only allowed to move in the vertical direction; the water sealing baffle 302 is slidably connected to the inner wall of the top of the inner shell 101, and the top of the water sealing baffle 302 cooperates with the pressure plate 301C. The inner wall of the top of the water sealing baffle 302 is fixedly connected with a compression spring 303, and the other end of the compression spring 303 is fixedly connected to the bottom of the scum outlet 101B. Under the elastic force of the compression spring 303, the water sealing baffle 302 maintains a tendency to move upward, and the scum outlet 101B is closed;

[0047] The water sealing baffle 302 extends outward to form a sealing outer plate 302A, and the sealing outer plate 302A matches the inner wall of the filter ring 301B. When the scum filter cartridge 301 is slightly above the water surface, the water sealing baffle 302 blocks the scum outlet 101B under the push of the compression spring 303; when the scum filter cartridge 301 moves downward to below the water surface, the pressure plate 301C presses the water sealing baffle 302 downward, the scum outlet 101B opens, and the scum and foam on the water surface flow into the scum filter cartridge 301. At this time, the filter ring 301B is blocked by the sealing outer plate 302A, and the wastewater in the scum filter cartridge 301 cannot be discharged; when the scum filter cartridge 301 moves upward to above the water surface, the filter ring 301B loses its shielding, and the wastewater in the scum filter cartridge 301 flows out under the action of gravity, and the scum is blocked and accumulated in the scum filter cartridge 301, completing a set of filtration of scum and foam. The scum filter cartridge 301 is repeatedly vertically slid to continuously filter the scum and foam on the wastewater surface.

[0048] like Fig.13 and Fig.14As shown, the cleaning mechanism 5 includes an inner shield 501, an outer shield 502, a brush rod 503 and a scraper 504. The inner shield 501 and the outer shield 502 are fixedly connected to the bottom of the filter chamber 106, the bottoms of the inner shield 501 and the outer shield 502 are connected to the cleaning chamber 105, the brush rod 503 and the scraper 504 are fixedly connected to the bottom of the cleaning chamber 105, and the brush rod 503 and the scraper 504 are matched with the inner shield 501. When the rotating filter 4 rotates to the area of ​​the inner baffle 501 and the outer baffle 502, the internal and external pressures are the same, which facilitates the brushing and removal of flocculants on the inner wall. As the rotating filter 4 rotates, its inner wall first contacts the brush rod 503 to brush out the flocculants that penetrate into the filter holes of the filter 401 to prevent them from clogging the filter holes, and then contacts the scraper 504 to completely scrape off the flocculants, which fall into the cleaning chamber 105 at the bottom under the action of gravity and are finally discharged through the sewage pipe 105A.

[0049] like Fig.12 As shown, a filter 401 is fixedly arranged on the outside of the rotating filter 4, the outer wall of the filter 401 matches with the outer baffle 502, the inner wall of the filter 401 matches with the inner baffle 501, a fan ring 402 is fixedly connected to the center of the rotating filter 4, and the inner wall of the filter 401 matches with the brush rod 503 and the scraper 504. The fan ring 402 is impacted by the water flow to drive the rotating filter 4 to rotate, and the filter 401 is constantly in contact with the brush rod 503 and the scraper 504 for cleaning, so as to maintain the best filtering effect for a long time.

[0050] A method for treating wastewater in a starch sugar production process, comprising the following steps:

[0051] a: Pour the starch sugar production wastewater into the inner shell 101, add a proper amount of flocculant, start the drive motor 201 and rotate it at high speed to stir and mix the wastewater and flocculant to achieve the treatment of insoluble organic matter and limited impurities;

[0052] b: The flocculated sediment is filtered by the rotating filter screen 4, and the flocculated sediment on the rotating filter screen 4 is then cleaned by the cleaning mechanism 5 into the cleaning chamber 105, and the flocculated sediment is discharged from the sewage pipe 105A;

[0053] c: Adjust the driving motor 201 to rotate slowly in the reverse direction, and introduce air into the air inlet pipe 601 to perform aeration operation to achieve the treatment of soluble organic matter. At the same time, the scum and froth flow into the scum filter cartridge 301 with the water flow, and are filtered and collected by the scum filter cartridge 301. The froth and froth are finally discharged from the scum discharge gate 301A.

[0054] Working principle:

[0055] 1. Wastewater and flocculant are poured into the inner shell 101, so that the water surface is close to the top of the scum outlet 101B, and the drive motor 201 is started and rotated forward at a high speed. The wastewater and flocculant are driven by the upper turbine 202B and the lower turbine 202C to collide and mix in the center of the filter chamber 106, which promotes the mixing of the flocculant and wastewater and completes the flocculation operation;

[0056] 2. The wastewater diffuses outward to flush the fan ring 402, driving the rotating filter screen 4. The flocculated sediment in the wastewater is filtered and blocked by the filter screen 401. After being filtered, it flows through the inner shell 101 from bottom to top. The wastewater near the side wall of the inner shell 101 enters the cavity between the inner shell 101 and the outer shell 102 through the connecting port 101C and flows downward to the connecting pipe 105B. The wastewater near the center of the inner shell 101 flows downward through the vertical pipe 107, and is stirred and mixed again. In the circulating flow, the flocculated sediment is efficiently filtered and cleaned;

[0057] 3. Adjust the drive motor 201 to rotate in the reverse direction at a low speed, introduce air into the air inlet pipe 601, and the aeration disk 6 starts aeration operation to promote the oxidation reaction of microorganisms in the wastewater to dissolved organic matter. The upper turbine 202B and the lower turbine 202C rotate to pump out the water at the bottom of the inner shell 101 and push it to the upper part of the inner shell 101, so that the water in the inner shell 101 flows slowly from top to bottom, increasing the residence time of bubbles in the water, and ensuring that microorganisms at different depths can be evenly exposed to air;

[0058] 4. The speed of the transmission shaft 202 is decelerated by the coaxial deceleration inner cylinder 205 and the coaxial deceleration outer cylinder 206, driving the scum collecting mechanism 3 to work slowly, and the scum filter cylinder 301 moves up and down slowly. The scum filter cylinder 301 moves downward, and the wastewater carries the scum and foam into the scum filter cylinder 301. The scum filter cylinder 301 rises, and the wastewater flows back to the inner shell 101. The scum and foam are filtered and finally discharged from the scum discharge gate 301A.

[0059] 5. Through flocculation operation, the insoluble organic matter and fiber impurities in the wastewater are treated. Through aeration operation, the soluble organic matter in the wastewater is treated. The treated wastewater is discharged from the drain valve 103.

[0060] The present invention provides a power mechanism 2. When the driving motor 201 rotates forward and rapidly, the wastewater and the flocculant are mixed rapidly and efficiently. At the same time, the water flows unidirectionally from bottom to top in the inner shell 101 and is filtered by the rotating filter screen 4 during the flow to remove the flocculated sediment. When the driving motor 201 rotates in the reverse direction and slowly, the water flows slowly from top to bottom in the inner shell 101 and cooperates with the aeration disk 6 to perform aeration operation to remove soluble organic matter in the wastewater, thereby avoiding the problem of uneven aeration effects between the upper and lower wastewater layers. At the same time, the scum collecting mechanism 3 filters and collects the froth and scum gathered on the top of the wastewater. By providing the scum collecting mechanism 3, The scum filter cartridge 301 moves downward and is below the water surface, and the water flow carries the scum and foam into the scum filter cartridge 301, and the scum filter cartridge 301 moves upward and is above the water surface, and the filter ring 301B blocks and filters the foam and scum. Compared with the traditional rotary scraper plate device which is only suitable for processing the situation where the amount of foam and scum is large and concentrated, the present device can achieve a better cleaning effect for smaller particles of scum; by arranging the aeration holes 602 on the aeration plate 6 on the side of the aeration plate 6, the gas has a certain lateral inertia when it is ejected, and the gas will also have a certain horizontal displacement during the floating process, which is convenient for the rapid diffusion of the gas, increases the contact area between the gas and the wastewater, and improves the aeration effect.

Claims

1. A wastewater treatment device used in the starch sugar production process, characterized in that: The utility model comprises a shell body, wherein the shell body comprises an inner shell and an outer shell, the inner shell and the bottom of the outer shell are fixedly connected with a supporting leg, a drain valve is fixedly installed at the bottom of the outer shell, a fixing frame is fixedly connected with the top of the inner shell, a power mechanism is fixedly arranged on the fixing frame, a scum collecting mechanism is arranged on the outer wall of the top of the inner shell, the scum collecting mechanism cooperates with the power mechanism, a scum outlet is fixedly arranged at the bottom of the fixing frame, the scum outlet cooperates with the scum collecting mechanism, a connecting port is fixedly arranged at the lower part of the scum outlet, a cleaning chamber is fixedly arranged at the bottom of the inner shell, a sewage pipe is extended outwardly from the side wall of the cleaning chamber, a cleaning mechanism is fixedly arranged on the cleaning chamber, a connecting pipe is fixedly arranged at the center of the cleaning chamber, a filter chamber is fixedly arranged at the upper part of the cleaning chamber, a rotating filter screen is rotatably connected in the filter chamber, the rotating filter screen cooperates with the cleaning mechanism, and the flocculated sediment attached to the inner wall of the rotating filter screen is cleaned up by setting the cleaning chamber and the cleaning mechanism, an aeration plate is fixedly arranged on the top of the filter chamber, an air inlet pipe is extended outwardly from the aeration plate, a plurality of aeration holes are fixedly arranged on the side wall of the aeration plate, and a vertical through pipe is fixedly arranged in the middle of the top of the filter chamber; The power mechanism includes a driving motor, which is fixedly connected to the middle of the top of the fixed frame, and the middle bottom of the fixed frame is fixedly connected to an inner rotating seat, a transmission shaft is arranged at the center of the inner rotating seat, a sliding rod is fixedly connected to the outer side of the inner rotating seat, a connecting slider is slidably connected to the sliding rod, an outer rotating seat is fixedly connected to the outer side of the sliding rod, the inner rotating seat is rotatably connected to a coaxial reduction inner cylinder, and the outer rotating seat is rotatably connected to a coaxial reduction outer cylinder; The outer wall of the coaxial reduction inner cylinder is fixedly connected to a driving guide rail, a rotating cavity is fixedly opened inside the coaxial reduction inner cylinder, a fixed rod is fixedly connected inside the rotating cavity, a torsion spring is fixedly connected to the fixed rod, a one-way clamping tooth is fixedly connected to the other end of the torsion spring, the one-way clamping tooth is rotatably connected to the fixed rod, a driving groove is fixedly opened on the outer wall of the coaxial reduction outer cylinder, and a driven curved groove is fixedly opened on the inner wall of the coaxial reduction outer cylinder; The scum collecting mechanism comprises a scum filter cartridge and a water sealing baffle, the scum filter cartridge is slidably connected to the outer wall of the top of the inner shell, a scum discharge gate is fixedly connected to the outer wall of the scum filter cartridge, a filter ring is fixedly connected inside the scum filter cartridge, a plurality of pressure plates are fixedly connected to the top of the filter ring, a connecting plate is fixedly connected to the top of the scum filter cartridge, an opening is fixedly opened at the center of the connecting plate, the opening is in sliding contact with the outer wall of the coaxial reduction outer cylinder, a limiting pin 2 is fixedly connected to the inner wall of the opening, the water sealing baffle is slidably connected to the inner wall of the top of the inner shell, a compression spring is fixedly connected to the inner wall of the top of the water sealing baffle, and the other end of the compression spring is fixedly connected to the bottom of the scum outlet; the speed of the transmission shaft is decelerated through the coaxial reduction inner cylinder and the coaxial reduction outer cylinder, driving the scum collecting mechanism to work slowly, the scum filter cartridge slowly moves up and down, the scum filter cartridge moves downward, the wastewater entrains the scum and foam and flows into the scum filter cartridge, the scum filter cartridge rises, and the wastewater flows back to the inner shell.

2. A wastewater treatment device for starch sugar production according to claim 1, characterized in that: The transmission shaft is fixedly connected to the output shaft of the driving motor, a gear ring is fixedly provided on the upper side wall of the transmission shaft, an upper turbine and a lower turbine are fixedly connected to the lower side wall of the transmission shaft, the upper turbine is located at the upper part of the filter chamber, the lower turbine is located at the lower part of the filter chamber, the upper turbine cooperates with the vertical pipe, and the lower turbine cooperates with the connecting pipe. The upper turbine and the lower turbine pump the wastewater into the filter chamber, so that the two water flows coming out of the vertical pipe and the connecting pipe collide and impact.

3. A wastewater treatment equipment for starch sugar production according to claim 2, characterized in that: The one-way clamping teeth are matched with the gear ring, the outer end of the connecting slider is fixedly connected to a limiting pin, the inner end of the connecting slider is fixedly provided with a limiting slot, and the limiting pin is matched with the driven bending slot.

4. A wastewater treatment equipment for starch sugar production according to claim 3, characterized in that: The second limit pin cooperates with the driving groove, and a sliding hole is fixedly opened on the outer side of the connecting plate, and the sliding hole is slidably connected to the fixed frame. The top of the water sealing baffle cooperates with the pressure plate. When the scum filter cartridge moves downward to below the water surface, the pressure plate presses the water sealing baffle downward, and the scum outlet opens. The water sealing baffle extends outward with a sealing outer plate, and the sealing outer plate cooperates with the inner wall of the filter ring. The scum and foam on the water surface flow into the scum filter cartridge. At this time, the filter ring is blocked by the sealing outer plate, and the waste water in the scum filter cartridge cannot be discharged.

5. A wastewater treatment device for starch sugar production according to claim 4, characterized in that: The cleaning mechanism includes an inner baffle cover, an outer baffle cover, a brush rod and a scraper. The inner baffle cover and the outer baffle cover are fixedly connected to the bottom of the filter chamber, the bottoms of the inner baffle cover and the outer baffle cover are connected to the cleaning chamber, and the brush rod and the scraper are fixedly connected to the bottom of the cleaning chamber; a filter is fixedly provided on the outside of the rotating filter, the outer wall of the filter cooperates with the outer baffle cover, the inner wall of the filter cooperates with the inner baffle cover, a fan ring is fixedly connected to the center of the rotating filter, the inner wall of the filter cooperates with the brush rod and the scraper, and as the rotating filter rotates, its inner wall first contacts with the brush rod to brush out the flocculants that penetrate into the filter holes of the filter, and then contacts with the scraper to completely scrape off the flocculants.

6. A method for treating wastewater using the wastewater treatment equipment in the starch sugar production process according to claim 5, comprising the following steps: a: Pour the starch sugar production wastewater into the inner shell, add an appropriate amount of flocculant, start the drive motor and rotate it at high speed to stir and mix the wastewater and flocculant to achieve the treatment of insoluble organic matter and limited impurities; b: The flocculated sediment is filtered by the rotating filter screen, and the flocculated sediment on the rotating filter screen is then cleaned into the cleaning chamber by the cleaning mechanism, and the flocculated sediment is discharged from the sewage pipe; c: Adjust the drive motor to rotate slowly in the reverse direction, and introduce air into the air inlet pipe for aeration operation to achieve the treatment of dissolved organic matter. At the same time, the scum and foam flow into the scum filter cartridge with the water flow, and are filtered and collected by the scum filter cartridge. The foam and foam are finally discharged from the scum discharge gate.

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