Stone processing sewage treatment process and treatment device

Abstract

The invention discloses a stone processing sewage treatment process and treatment device, and belongs to the field of sewage treatment. The device comprises a settling chamber, a reaction filter chamber and a concentration sludge discharge chamber which are sequentially arranged from top to bottom, the reaction chamber is connected with a liquid injection pipe, and the liquid injection pipe is connected with a dosing branch pipe and used for adding a coagulant in the process of injecting sewage into the reaction chamber; a filter plate is connected to the interior of the reaction chamber, a gap is reserved between the filter plate and the upper edge of the reaction chamber, sewage in the reaction chamber passes through the filter plate from bottom to top, and the filtered sewage overflows into the overflow liquid collection chamber through the upper edge of the reaction chamber; sewage above the filter plate is used for backwashing the filter plate, so that the filter plate is cleaned. Meanwhile, the purpose of automatic mixing is achieved by dosing and mixing in the process of injecting the sewage into the reaction chamber and utilizing sewage flowing and surging in the reaction chamber, and reduction of the overall energy consumption of sewage treatment is facilitated.

Description

Technical Field

[0001] This invention relates to the field of wastewater treatment, and in particular to a wastewater treatment process and device for stone processing. Background Technology

[0002] Wastewater generated during stone processing includes rinsing wastewater, cooling wastewater, oily wastewater, and pigment wastewater. To meet environmental emission standards, the wastewater generated during processing needs to be purified.

[0003] Wastewater generated from stone processing mainly contains stone powder (suspended solids) and pollutants such as grease and chemicals. Existing treatment processes typically include: Primary treatment: solid-liquid separation pretreatment, which uses filtration to intercept large particles of gravel and debris in the wastewater.

[0004] Secondary treatment: coagulation and flocculation sedimentation. By adding coagulants, the tiny stone powder particles in the water lose stability and aggregate together to form larger, more easily settled "flocs".

[0005] Three-stage treatment: clean water reuse and sludge dewatering. After sedimentation, the clear water at the top flows by gravity into the clean water tank or water purification tower, and can be directly recycled through pipelines. The concentrated sludge at the bottom of the sedimentation unit is sent to a filter press for dewatering.

[0006] On the one hand, existing methods for filtering wastewater generated from stone processing involve intercepting and filtering flowing wastewater, such as intercepting and filtering wastewater flowing horizontally or filtering wastewater flowing downwards by its own gravity. However, the filter screen inevitably becomes clogged during filtration and needs to be cleaned regularly. In both of these filtration methods, in order to thoroughly remove the impurities stuck in the filter holes, the filter screen needs to be rinsed or disassembled for cleaning. This makes the cleaning process cumbersome, inconvenient, time-consuming, and labor-intensive, resulting in low cleaning efficiency and affecting the overall wastewater treatment efficiency.

[0007] On the other hand, after adding coagulants, the wastewater needs to be stirred in order to improve the flocculation effect and increase the "growth" rate of the flocs. Sedimentation requires the water body to be relatively stable, so it is necessary to set up separate stirring and sedimentation zones, resulting in a large overall space occupation. Setting up separate stirring zones also increases the energy consumption of wastewater treatment. Summary of the Invention

[0008] This invention provides a wastewater treatment device for stone processing. By utilizing the drop in wastewater level inside the reaction chamber, the wastewater above the filter plate is used to backwash the filter plate, which solves the problem of low cleaning efficiency in the prior art, affecting the overall wastewater treatment efficiency. Furthermore, by adding chemicals during the wastewater injection process, the invention solves the problem of increased energy consumption in wastewater treatment caused by the need for an additional stirring zone in the prior art.

[0009] A wastewater treatment process and device for stone processing includes: a sedimentation chamber, a reaction filtration chamber, and a thickening and sludge discharge chamber arranged sequentially from top to bottom, with a first sludge discharge pipe connected to the thickening and sludge discharge chamber at the bottom of the sedimentation chamber; the reaction filtration chamber includes a reaction chamber and an overflow collection chamber surrounding the outside of the reaction chamber; the overflow collection chamber is connected to an outlet pipe for injecting wastewater from the overflow collection chamber into the sedimentation chamber; the reaction chamber is connected to an injection pipe for injecting wastewater, and the injection pipe is connected to a dosing branch pipe for adding coagulant during the wastewater injection into the reaction chamber; a second sludge discharge pipe connected to the thickening and sludge discharge chamber is connected to the bottom of the reaction chamber; a filter plate is connected inside the reaction chamber, with a gap between the filter plate and the upper edge of the reaction chamber, so that the wastewater in the reaction chamber passes through the filter plate from bottom to top, and the filtered wastewater overflows into the overflow collection chamber through the upper edge of the reaction chamber, and the wastewater level inside the reaction chamber drops, causing the wastewater above the filter plate to backwash the filter plate, thereby cleaning the filter plate.

[0010] As a preferred embodiment of the present invention, the injection pipe is arranged along the tangential direction of the reaction chamber, so that the sewage injected into the reaction chamber by the injection pipe forms a swirling flow.

[0011] As a preferred embodiment of the present invention, the bottom wall of the reaction chamber is provided with an inwardly facing conical protrusion structure, and an annular mud collection groove is formed between the conical protrusion structure and the inner wall of the reaction chamber. There are multiple second mud discharge pipes, which are evenly distributed along the annular mud collection groove.

[0012] As a preferred embodiment of the present invention, a guide pipe is fixedly connected to the bottom wall of the reaction chamber. The lower end of the guide pipe is connected to the concentration and sludge discharge chamber, and the upper end passes through the filter plate. The first sludge discharge pipe cooperates with the guide pipe to achieve communication with the concentration and sludge discharge chamber.

[0013] As a preferred embodiment of the present invention, the guide pipe is rotatably connected to an annular seat, the annular seat is fixedly connected to several support rods, and the support rods are fixedly connected to blades and scraper blades adapted to the annular sludge collection trough. The blades are driven by the water flow in the reaction chamber, causing the annular seat to rotate, and the sludge is scraped off by the scraper blades.

[0014] As a preferred embodiment of the present invention, the guide tube is rotatably connected to a rotating cylinder, and a plurality of connecting lugs are fixedly connected to the outer wall of the rotating cylinder. A vertically arranged fixing rod is fixedly connected to the connecting lugs, and a brush strip is fixedly connected to the upper end of the fixing rod. The annular seat is sleeved on the outside of the rotating cylinder and is used to drive the rotating cylinder to rotate through the annular seat and to clean the lower surface of the filter plate through the brush strip.

[0015] As a preferred embodiment of the present invention, a flange ring is fixedly connected to the outer wall of the guide pipe, and positioning holes are arranged in a circumferential array on the flange ring; the annular seat is provided with a through hole that fits with the fixed rod with a clearance, and a number of positioning pins and a number of connecting rods are fixedly connected to the annular seat. A float is fixedly connected to the upper end of the connecting rod, which is used to drive the annular seat to move upward through the float, so that the scraper moves out of the annular mud collection groove, and the circumferential rotation of the annular seat and the rotating drum is limited by the positioning pins cooperating with the positioning holes.

[0016] As a preferred embodiment of the present invention, the bottom of the sedimentation chamber is funnel-shaped, and the sedimentation chamber includes a sedimentation chamber and a confluence chamber surrounding the outside of the sedimentation chamber, so that the upper layer of clear water in the sedimentation chamber overflows into the confluence chamber from the upper edge of the sedimentation chamber; the confluence chamber is connected to a drain pipe.

[0017] As a preferred embodiment of the present invention, the structure of the sludge concentration and discharge chamber is the same as that of the sedimentation chamber.

[0018] A wastewater treatment process for stone processing, applied to the aforementioned wastewater treatment device for stone processing, includes the following steps: Step 1: Preliminary flocculation and filtration. During the process of injecting wastewater into the reaction chamber, coagulant is added so that the coagulant and wastewater are mixed in the reaction chamber. Through continuous injection, the wastewater inside the reaction chamber passes through the filter plate from bottom to top, thus achieving wastewater filtration. The filtered wastewater overflows into the overflow collection chamber. Step 2: Flocculation and sedimentation. Wastewater in the overflow collection chamber is pumped into the sedimentation chamber for sedimentation, and the clear water in the sedimentation chamber overflows into the confluence chamber from the top edge of the sedimentation chamber. Step 3: Concentration and sludge discharge. The sediment in the reaction chamber and sedimentation chamber is discharged into the concentration and sludge discharge chamber and then discharged through the concentration and sludge discharge chamber. This also includes a filter plate cleaning step, specifically including: S1: Stop injecting wastewater into the reaction chamber; S2: Open the second sludge pipe and use the drop in sewage level in the reaction chamber to backwash the filter plate with sewage above it, thus cleaning the filter plate.

[0019] The present invention has the following beneficial effects: 1. This invention cleans the filter plates by installing filter plates inside the reaction chamber and using the upward flow of sewage for filtration. As the sewage level inside the reaction chamber drops, the sewage above the filter plates backwashes them, thus reducing the need for manual cleaning and effectively ensuring overall cleaning and sewage treatment efficiency.

[0020] 2. This invention achieves automatic mixing by adding chemicals during the process of injecting wastewater into the reaction chamber and utilizing the flow and surging of wastewater within the reaction chamber. This eliminates the need for an additional stirring zone, effectively reducing the overall volume of the treatment device and also helping to reduce the overall energy consumption of wastewater treatment. Attached Figure Description

[0021] Figure 1 This invention provides a schematic diagram of a wastewater treatment device for stone processing. Figure 2 for Figure 1 A structural diagram viewed from below; Figure 3 for Figure 1 The front view; Figure 4 for Figure 3 Top view; Figure 5 This is a schematic diagram of the reaction filtration chamber. Figure 6 for Figure 4 Sectional view at point AA; Figure 7 for Figure 4 Sectional view at point BB; Figure 8 for Figure 7 The front view; Figure 9 This is a schematic diagram of the internal structure of the sewage treatment device during sewage discharge. Figure 10 for Figure 9 The front view; Figure 11 Exploded view of the structure of the annular seat, rotating cylinder, and flange ring; Figure 12 Exploded view of the annular seat and rotating cylinder structure; Figure 13 for Figure 7 Enlarged view of the structure of section C; Figure 14 for Figure 9 Enlarged view of the structure of section D in the middle.

[0022] Explanation of reference numerals in the attached figures: 1-Sedimentation chamber, 2-Reaction and filtration chamber, 3-Concentration and sludge discharge chamber, 4-Annular seat, 5-Rotating drum, 11-Sedimentation chamber, 12-Manifold chamber, 21-Reaction chamber, 22-Overflow collection chamber, 23-Filter plate, 24-Second sludge discharge pipe, 101-First sludge discharge pipe, 102-Drainage pipe, 201-Outlet pipe, 202-Injection pipe, 203-Dosing branch pipe, 204-Conical protrusion structure, 205-Annular sludge collection trough, 206-Conduit pipe, 207-Flange ring, 208-Positioning hole, 401-Support rod, 402-Blade, 403-Sludge scraper, 404-Through hole, 405-Positioning pin, 406-Connecting rod, 407-Float body, 501-Connecting ear plate, 502-Fixing rod, 503-Brush strip. Detailed Implementation

[0023] The specific embodiments of the present invention will be described in detail below, but it should be understood that the scope of protection of the present invention is not limited to the specific embodiments.

[0024] like Figures 1 to 4 As shown in the figure, an embodiment of the present invention provides a wastewater treatment device for stone processing, comprising a sedimentation chamber 1, a reaction filtration chamber 2, and a thickening and sludge discharge chamber 3 arranged sequentially from top to bottom. The sedimentation chamber 1, the reaction filtration chamber 2, and the thickening and sludge discharge chamber 3 are all cylindrical structures and are interconnected and fixed to each other by flange structures.

[0025] Existing wastewater treatment methods typically involve pumping wastewater to a high level, where it is filtered as it flows downwards under its own weight, and then the filtered wastewater is injected into a sedimentation zone for settling.

[0026] In existing treatment processes, wastewater initially contains many impurities and has a high density. If the reaction filter chamber 2 of the treatment device in this invention is placed at the top, pumping wastewater into the high-level reaction filter chamber 2 would require a large amount of energy. On the other hand, placing the reaction filter chamber 2 at the bottom would be detrimental to subsequent sludge discharge. Therefore, the treatment device in this invention places the reaction filter chamber 2 in the middle, that is, the sedimentation chamber 1, the reaction filter chamber 2, and the thickening and sludge discharge chamber 3 are arranged sequentially from top to bottom. This approach can balance energy consumption and ensure that the sediment in the sedimentation chamber 1 and the reaction filter chamber 2 can be smoothly discharged into the thickening and sludge discharge chamber 3 at the bottom.

[0027] like Figure 1 , Figure 6 and Figure 7 As shown, the sedimentation chamber 1 includes a sedimentation chamber 11 and a collection chamber 12 surrounding the outside of the sedimentation chamber 11, so that the upper layer of clear water in the sedimentation chamber 11 overflows into the collection chamber 12 from the upper edge of the sedimentation chamber 11. The collection chamber 12 is connected to a drain pipe 102, so that the clear water collected in the collection chamber 12 can be drained and recycled through the pipe.

[0028] The bottom of the sedimentation chamber 1 has a funnel-shaped structure, which allows the sediment in the sedimentation chamber 11 to automatically collect towards the center. Furthermore, a first sludge discharge pipe 101 is provided at the center of the bottom of the sedimentation chamber 1, which is connected to the concentration and sludge discharge chamber 3. The first sludge discharge pipe 101 passes through the reaction filter chamber 2, allowing the collected sediment to be discharged into the concentration and sludge discharge chamber 3 through the first sludge discharge pipe 101. A valve (not shown in the figure) can be installed on the first sludge discharge pipe 101 to control the discharge of sediment, or the gravity sludge discharge method in the prior art can be used for discharge, which will not be elaborated here.

[0029] The structure of the thickening and sludge discharge chamber 3 is the same as that of the sedimentation chamber 1. The sediment is further precipitated inside the thickening and sludge discharge chamber 3, and the released interstitial water is collected and recycled after overflow. When the sediment settles to a certain concentration or sludge level (such as by detection by an ultrasonic sludge level gauge, which is existing technology and will not be described in detail here), it is discharged through the bottom sludge discharge pipe. The discharge control of the sludge discharge pipe can be implemented with reference to the first sludge discharge pipe 101.

[0030] like Figures 5-7 As shown, the reaction filtration chamber 2 includes a reaction chamber 21 and an overflow collection chamber 22 surrounding the outside of the reaction chamber 21. The bottom of the reaction chamber 21 is connected to a second sludge discharge pipe 24 that communicates with the concentration sludge discharge chamber 3. A valve (not shown in the figure) can be installed on the second sludge discharge pipe 24 to control the discharge of sediment.

[0031] Meanwhile, the reaction chamber 21 is connected to an injection pipe 202 for sewage injection. The injection pipe 202 is connected to a dosing branch pipe 203. The injection pipe 202 passes through the overflow collection chamber 22 and communicates with the interior of the reaction chamber 21. The stone processing sewage collected in the production and processing area is injected into the reaction chamber 21 through the injection pipe 202.

[0032] If an additional stirring zone is set up inside the reaction filtration chamber 2 or outside the treatment device, it will not only increase the overall space occupied, but also increase the overall energy consumption due to the need to drive the stirring structure. Since the sewage is already in a flowing state during the process of being injected into the reaction chamber 21, and will continue to flow and surge as it enters the reaction chamber 21, it has a certain kinetic energy. Therefore, during the process of sewage injection into the reaction chamber 21, coagulant is added through the dosing branch pipe 203, so that the coagulant and sewage are initially mixed. With the flow and surge of the sewage after entering the reaction chamber 21, the coagulant and sewage are further fully mixed.

[0033] Since water filtration typically involves intercepting and filtering horizontally flowing sewage or using gravity to filter downward-flowing sewage, both of these methods require rinsing or disassembling the filter screen to thoroughly remove impurities stuck in the filter holes. This cleaning process is not only cumbersome and inconvenient, but also forces the entire treatment equipment to stop operating during filter screen disassembly and cleaning, thus affecting the overall sewage treatment efficiency.

[0034] like Figure 6 and Figure 8 As shown, in order to reduce the frequency of cleaning and the manual cleaning process, a filter plate 23 is connected inside the reaction chamber 21. As sewage is continuously injected into the reaction chamber 21, the sewage level rises, causing the sewage in the reaction chamber 21 to pass through the filter plate 23 from bottom to top, as shown by the arrow in the figure. Thus, the filter plate 23 is used to achieve filtration. After filtration, the sewage overflows into the overflow collection chamber 22 through the upper edge of the reaction chamber 21.

[0035] Because the wastewater is filtered by overflowing upwards, larger particles in the wastewater can settle directly to the bottom of the reaction chamber 21 under their own gravity, thereby reducing the filtration pressure of the filter plate 23 and reducing the occurrence of clogging of the filter plate 23.

[0036] like Figure 10 As shown, there is a gap between the filter plate 23 and the upper edge of the reaction chamber 21, so that a certain amount of filtered wastewater will remain above the filter plate 23. When cleaning is required, the wastewater can be discharged by opening the second sludge pipe 24. The wastewater level inside the reaction chamber 21 drops, causing the wastewater above the filter plate 23 to flow downwards, thus achieving reverse flushing of the filter plate 23, as shown by the arrow in the figure. This flushes out the impurities or foreign objects clogging the lower surface of the filter plate 23, thereby achieving automatic cleaning of the filter plate 23 and avoiding the need for manual cleaning due to clogging.

[0037] Meanwhile, the cleaning process of filter plate 23 can be carried out simultaneously with the discharge of sediment inside reaction chamber 21, eliminating the need for separate cleaning of filter plate 23, further reducing the downtime of the treatment equipment, and thus ensuring the overall wastewater treatment efficiency.

[0038] After being filtered by filter plate 23, the wastewater overflows into overflow collection chamber 22 and is collected through overflow collection chamber 22. Overflow collection chamber 22 is connected to water outlet pipe 201. A water pump (not shown in the figure) can be installed outside reaction filter chamber 2. The water inlet of the water pump is connected to water outlet pipe 201 through a pipe, and the water outlet of the water pump is connected to sedimentation chamber 1 through a pipe. Thus, the water pump is used to inject the wastewater in overflow collection chamber 22 into sedimentation chamber 1.

[0039] Because coagulant is added during the process of injecting sewage into the reaction chamber 21, the sewage is mixed using its own kinetic energy. After the sewage is injected into the reaction chamber 21, the overall flow is restricted due to the resistance of the water itself. In order to ensure the overall mixing effect, the injection pipe 202 is set along the tangential direction of the reaction chamber 21, so that the sewage injected into the reaction chamber 21 by the injection pipe 202 forms a swirling flow. On the one hand, the sewage can rotate continuously, thereby ensuring the overall mixing effect and promoting the "growth" of flocs.

[0040] On the other hand, the swirling flow of wastewater allows larger particles and flocs to quickly aggregate and settle under centrifugal force, thereby further improving wastewater treatment efficiency.

[0041] While creating a swirling flow in the wastewater can improve the collection and sedimentation of particles and flocs, a flat bottom wall in the reaction chamber 21 would hinder sediment collection, causing inconvenience for subsequent wastewater discharge. Conversely, designing the bottom of the reaction chamber 21 as a funnel-shaped structure similar to the bottom of the sedimentation chamber 1 allows sediment collection, but the first sludge discharge pipe 101 connected to the sedimentation chamber 1 needs to penetrate the bottom wall of the reaction chamber 21 to discharge wastewater into the concentration sludge discharge chamber 3. This would negatively impact the funnel-shaped structure at the bottom of the reaction chamber 21 and also interfere with the second sludge discharge pipe 24.

[0042] To balance the location of the first row of mud pipes 101 with the collection of sediment within the reaction chamber 21, the bottom wall of the reaction chamber 21 is designed as an inward-facing conical protrusion 204. An annular mud collection trough 205 is formed between the conical protrusion 204 and the inner wall of the reaction chamber 21, and the annular mud collection trough 205 is coaxially arranged with the reaction chamber 21. This allows the sediment inside the reaction chamber 21 to slide into the annular mud collection trough 205 under the action of the conical protrusion 204, thus facilitating sediment collection. The first row of mud pipes 101 simply passes through the center of the conical protrusion 204.

[0043] In this embodiment, there are multiple second mud discharge pipes 24, which are evenly distributed along the annular mud collection trough 205. The sediment collected in the annular mud collection trough 205 is discharged into the concentration mud discharge chamber 3 below through the multiple second mud discharge pipes 24.

[0044] Since the sedimentation chamber 1 and the reaction filtration chamber 2 are detachably connected, the first row of mud pipes 101 directly penetrates the bottom of the reaction chamber 21, which will inevitably affect the sealing. If the sealing effect between the first row of mud pipes 101 and the bottom wall of the reaction chamber 21 is to be guaranteed, the processing difficulty, installation difficulty and design difficulty will be increased.

[0045] To facilitate the installation of sedimentation chamber 1 and reaction filtration chamber 2, a guide pipe 206 is fixedly connected to the bottom wall of reaction chamber 21. The guide pipe 206 can be directly welded to the center of the conical protrusion structure 204. The lower end of the guide pipe 206 is connected to the thickening and sludge discharge chamber 3, and the upper end passes through the filter plate 23. The upper end of the guide pipe 206 needs to be higher than the overflow edge of reaction chamber 21 to prevent sewage from flowing back into the guide pipe 206.

[0046] When the sedimentation chamber 1 and the reaction filtration chamber 2 are installed, the lower end of the first sludge discharge pipe 101 is directly inserted into the guide pipe 206. By using the cooperation between the first sludge discharge pipe 101 and the guide pipe 206, the connection with the concentration sludge discharge chamber 3 is realized. Thus, when the first sludge discharge pipe 101 discharges sludge, it discharges into the concentration sludge discharge chamber 3 through the guide pipe 206, thereby solving the installation and sealing problem between the first sludge discharge pipe 101 and the bottom wall of the reaction chamber 21.

[0047] Furthermore, to further improve the sealing effect, a sealing ring or other means can be added between the outer wall of the first sludge discharge pipe 101 and the upper end of the guide pipe 206 to achieve a seal between the first sludge discharge pipe 101 and the guide pipe 206. This not only prevents sewage from flowing back into the guide pipe 206, but also makes the concentrated sludge discharge chamber 3 and the reaction filter chamber 2 form a seal, avoiding the influence of pressure difference between them.

[0048] In the above embodiment, the sediment is collected by setting up an annular sludge collection trough 205. Although there are multiple second-row sludge pipes 24, they are still spaced apart, which may result in the sediment in the annular sludge collection trough 205 not being completely discharged. Adding an additional scraping mechanism would increase the overall energy consumption and processing difficulty.

[0049] like Figure 9 and Figure 11 As shown, in order to solve the above-mentioned potential problems, based on the above implementation method, an annular seat 4 is rotatably connected through the guide tube 206, and two to four support rods 401 are fixedly connected to the annular seat 4. Taking two in the figure as an example, the two support rods 401 are symmetrically arranged relative to the annular seat 4. The support rods 401 are welded or fixedly connected to blades 402 and scraper blades 403 adapted to the annular mud collection groove 205 by connecting rods and bolts.

[0050] As the water flow injected into the reaction chamber 21 forms a swirling flow, it drives the blades 402 to rotate the annular seat 4. During the rotation of the annular seat 4, the sludge in the annular sludge collection trough 205 is scraped off by the scraper 403. During the scraping process, the sludge falls into the second sludge pipe 24, thus ensuring that the sludge in the annular sludge collection trough 205 is completely discharged.

[0051] Furthermore, although the filter plate 23 can be backwashed by sewage to avoid clogging, flocs or solid particles will inevitably adhere to its surface after prolonged use. In order to further reduce the manual cleaning process and the frequency of clogging, another preferred embodiment of this application is as follows: like Figure 9 and Figure 12 As shown, the guide tube 206 is rotatably connected to the rotating cylinder 5. The rotating cylinder 5 can be configured as an inner cylinder and an outer cylinder. The inner cylinder is sleeved on the outside of the guide tube 206 and fixed by bolts, etc. The inner cylinder and the outer cylinder are rotatably connected by bearings and are mutually rotated and sealed.

[0052] The outer wall of the outer cylinder of the rotating cylinder 5 is fixedly connected with two or four connecting lugs 501. Taking the two in the attached figure as an example, the two connecting lugs 501 are symmetrically arranged relative to the rotating cylinder 5. The connecting lugs 501 are welded or fixedly connected by threads and nuts to a vertically arranged fixing rod 502. The upper end of the fixing rod 502 is fixedly connected to a brush strip 503.

[0053] The annular seat 4 is fitted onto the outside of the rotating drum 5, so that when the water flow drives the annular seat 4 to rotate, the annular seat 4 drives the rotating drum 5 to rotate, and then the brush strips 503 clean the lower surface of the filter plate 23. This achieves surface cleaning via the brush strips 503 without adding additional power. The two brush strips 503 can be staggered, allowing each brush strip 503 to clean different areas of the filter plate 23. This reduces the length and resistance of a single brush strip 503, ensuring effective support for the brush strips 503 during cleaning without increasing the strength of the fixing rod 502.

[0054] The above-described embodiment uses the annular seat 4 to drive the scraper 403 to scrape away the sediment in the annular mud collection trough 205, and uses the annular seat 4 to drive the rotating drum 5 to rotate, and uses the brush strip 503 to clean the surface of the filter plate 23.

[0055] However, since wastewater treatment is a continuous process, if the annular seat 4 rotates continuously, the scraper 403 and brush 503 will not only experience increased wear during continuous rotation, but will also affect the swirling of wastewater and the settling of sediment. Furthermore, since the clogging of the filter plate 23 and the accumulation of sediment in the annular sludge collection trough 205 take a certain amount of time to occur, it is unnecessary for the annular seat 4 to maintain continuous rotation.

[0056] Therefore, this application makes further improvements based on the above embodiments, specifically as follows: like Figures 6-8 and Figure 11As shown, a flange ring 207 is fixedly connected to the outer wall of the guide pipe 206 by screws, and the flange ring 207 has positioning holes 208 arranged in a circumferential array. The annular seat 4 has a through hole 404 that fits with the fixed rod 502 with a clearance, so that the annular seat 4 can drive the rotating drum 5 to rotate through the fixed rod 502, and also allows the annular seat 4 to move axially along the rotating drum 5.

[0057] like Figure 12 and Figure 14 As shown, the annular seat 4 is fixedly connected with several positioning pins 405 and several connecting rods 406. Taking the attached figure as an example, there are two positioning pins 405 and two connecting rods 406, which are symmetrically arranged relative to the rotating cylinder 5. The upper end of the connecting rod 406 is fixedly connected to a float 407.

[0058] like Figure 13 As shown, during normal sewage treatment, the reaction chamber 21 is filled with sewage. At this time, the buoyancy generated by the float 407 in the sewage drives the annular seat 4 to move upward, so that the scraper 403 moves out of the annular sludge collection trough 205.

[0059] Furthermore, during the upward movement of the annular seat 4, the annular seat 4 is driven by the swirling flow to maintain rotation. When the positioning pin 405 corresponds to the positioning hole 208, the positioning pin 405 cooperates with the positioning hole 208, preventing the annular seat 4 from continuing to rotate. This limits the circumferential rotation of the annular seat 4 and the rotating drum 5, ensuring that the scraper 403 and the brush 503 remain in fixed positions, thereby reducing wear.

[0060] Furthermore, after the scraper 403 moves out of the annular sludge collection trough 205, it will not obstruct the swirling sewage at the position of the annular sludge collection trough 205, that is, no turbulence will be formed at the position of the annular sludge collection trough 205, thereby ensuring that particles and flocs can be stably settled in the annular sludge collection trough 205.

[0061] like Figure 9 and Figure 10 As shown, during periodic sewage discharge inside the reaction chamber 21, the internal sewage level drops, causing the annular seat 4 to descend. The positioning pin 405 disengages from the positioning hole 208, causing the annular seat 4 to rotate. This allows the scraper 403 to scrape away sediment inside the annular sludge collection trough 205, and the brush strip 503 to clean the filter plate 23. If the driving force of residual sewage inside the reaction chamber 21 is insufficient during sewage discharge, the annular seat 4 will also rotate during the re-injection of sewage. This ensures that the cleaning of the inside of the annular sludge collection trough 205 and the surface of the filter plate 23 is completed simultaneously during periodic sewage discharge inside the reaction chamber 21, effectively guaranteeing overall ease of use and practicality.

[0062] The process of treating wastewater from stone processing using the wastewater treatment device described in the above embodiments specifically includes the following steps: Step 1: Preliminary flocculation and filtration. During the process of sewage being injected into the reaction chamber 21 through the injection pipe 202, coagulant is added through the dosing branch pipe 203. The amount of coagulant added can be determined according to the sewage flow rate in the injection pipe 202. The ratio of coagulant to sewage is controlled by using the flow rate ratio of the two. This method is a conventional technical means in the fields of sewage treatment and chemical industry, and will not be described in detail in this embodiment.

[0063] The added coagulant and wastewater are mixed in the reaction chamber 21, using the kinetic energy of the wastewater itself. This avoids the need for separate mixing and sedimentation zones, which would result in a large overall space occupation, and also avoids the problem of increased energy consumption in wastewater treatment caused by setting up separate mixing zones.

[0064] Furthermore, through continuous injection, the wastewater inside the reaction chamber 21 flows from bottom to top through the filter plate 23, achieving wastewater filtration. The filtered wastewater overflows into the overflow collection chamber 22. By using the upward flow of wastewater for filtration, larger particles in the wastewater can directly settle to the bottom of the reaction chamber 21 under their own gravity, thereby reducing the filtration pressure on the filter plate 23.

[0065] like Figure 10 As shown, this configuration also aims to achieve automatic cleaning of the filter plate 23, and includes a cleaning step for the filter plate 23, specifically including: S1: Stop injecting wastewater into the reaction chamber 21. At this time, a certain amount of filtered wastewater will still remain between the upper surface of the filter plate 23 and the upper end face of the reaction chamber 21.

[0066] S2: When periodically draining the reaction chamber 21, open the second sludge pipe 24. The sewage level in the reaction chamber 21 drops, causing the sewage above the filter plate 23 to backwash the filter plate 23, thereby flushing out the impurities or foreign objects blocking the lower surface of the filter plate 23 and cleaning the filter plate 23.

[0067] Step 2: Flocculation and sedimentation. The sewage in the overflow collection chamber 22 is injected into the sedimentation chamber 11 by a water pump (not shown in the figure) for sedimentation. The upper layer of clear water in the sedimentation chamber 11 overflows into the confluence chamber 12 from the upper edge of the sedimentation chamber 11. The clear water collected in the confluence chamber 12 can be diverted and recycled through a pipeline.

[0068] Step 3: Concentration and sludge discharge. The sediment in the reaction chamber 21 is discharged into the concentration and sludge discharge chamber 3 through the second sludge discharge pipe 24. The sediment in the sedimentation chamber 11 is discharged into the concentration and sludge discharge chamber 3 through the first sludge discharge pipe 101 and the connecting pipe 206, and is then discharged centrally through the concentration and sludge discharge chamber 3.

[0069] The reason for setting up the thickening and sludge discharge chamber 3 is that the sediment in the reaction chamber 21 and the sedimentation chamber 11 contains a certain amount of interstitial water. After being discharged into the thickening and sludge discharge chamber 3, the sediment will further settle, thereby releasing a certain amount of interstitial water, achieving the effect of thickening, and thus improving the wastewater recycling rate.

[0070] When the sediment concentration in the sludge discharge chamber 3 reaches the set value or the sludge level is too high, the bottom sludge discharge pipe is opened to discharge the high-concentration sediment, which can then be sent to a filter press for final dewatering, thereby maximizing the recycling of wastewater.

[0071] The above-disclosed embodiments are merely a few specific examples of the present invention. However, the embodiments of the present invention are not limited thereto, and any variations that can be conceived by those skilled in the art should fall within the protection scope of the present invention.

Claims

1. A wastewater treatment device for stone processing, characterized in that, It includes a sedimentation chamber (1), a reaction filtration chamber (2) and a concentration and sludge discharge chamber (3) arranged sequentially from top to bottom, and a first sludge discharge pipe (101) connected to the concentration and sludge discharge chamber (3) is provided at the bottom of the sedimentation chamber (1). The reaction filtration chamber (2) includes a reaction chamber (21) and an overflow collection chamber (22) surrounding the outside of the reaction chamber (21); the overflow collection chamber (22) is connected to an outlet pipe (201) for injecting the sewage in the overflow collection chamber (22) into the sedimentation chamber (1). The reaction chamber (21) is connected to an injection pipe (202) for sewage injection, and the injection pipe (202) is connected to a dosing branch pipe (203) for adding coagulant during the sewage injection into the reaction chamber (21); the bottom of the reaction chamber (21) is connected to a second sludge discharge pipe (24) that communicates with the concentration sludge discharge chamber (3). The reaction chamber (21) is connected to a filter plate (23). There is a gap between the filter plate (23) and the upper edge of the reaction chamber (21), so that the sewage in the reaction chamber (21) passes through the filter plate (23) from bottom to top. After filtration, the sewage overflows into the overflow collection chamber (22) through the upper edge of the reaction chamber (21). The sewage level in the reaction chamber (21) drops, so that the sewage above the filter plate (23) washes the filter plate (23) in reverse, thereby cleaning the filter plate (23).

2. The stone processing wastewater treatment device as described in claim 1, characterized in that, The injection pipe (202) is arranged along the tangential direction of the reaction chamber (21), so that the sewage injected into the reaction chamber (21) by the injection pipe (202) forms a swirling flow.

3. The stone processing wastewater treatment device as described in claim 2, characterized in that, The bottom wall of the reaction chamber (21) is provided with an inward conical protrusion structure (204), and an annular mud collection groove (205) is formed between the conical protrusion structure (204) and the inner wall of the reaction chamber (21). There are multiple second mud discharge pipes (24), which are evenly distributed along the annular mud collection groove (205).

4. The stone processing wastewater treatment device as described in claim 2 or 3, characterized in that, The bottom wall of the reaction chamber (21) is fixedly connected to a guide pipe (206). The lower end of the guide pipe (206) is connected to the concentration and sludge discharge chamber (3), and the upper end passes through the filter plate (23). The first sludge discharge pipe (101) cooperates with the guide pipe (206) to achieve communication with the concentration and sludge discharge chamber (3).

5. The stone processing wastewater treatment device as described in claim 4, characterized in that, The guide pipe (206) is rotatably connected to an annular seat (4), and the annular seat (4) is fixedly connected to several support rods (401). The support rods (401) are fixedly connected to blades (402) and scraper blades (403) adapted to the annular sludge collection tank (205). The blades (402) are driven by the water flow in the reaction chamber (21) to make the annular seat (4) rotate, and the sludge in the annular sludge collection tank (205) is scraped off by the scraper blades (403).

6. The stone processing wastewater treatment device as described in claim 5, characterized in that, The guide tube (206) is rotatably connected to a rotating cylinder (5), and a plurality of connecting ear plates (501) are fixedly connected to the outer wall of the rotating cylinder (5). A vertically arranged fixing rod (502) is fixedly connected to the connecting ear plate (501), and a brush strip (503) is fixedly connected to the upper end of the fixing rod (502). The annular seat (4) is sleeved on the outside of the rotating drum (5) and is used to drive the rotating drum (5) to rotate through the annular seat (4) and to clean the lower surface of the filter plate (23) through the brush strip (503).

7. The stone processing wastewater treatment device as described in claim 6, characterized in that, A flange ring (207) is fixedly connected to the outer wall of the guide pipe (206), and positioning holes (208) are arranged in a circumferential array on the flange ring (207). The annular seat (4) has a through hole (404) that is clearance-fitted with the fixed rod (502). The annular seat (4) is fixedly connected with a number of positioning pins (405) and a number of connecting rods (406). The upper end of the connecting rod (406) is fixedly connected with a float (407), which is used to drive the annular seat (4) to move upward through the float (407), so that the scraper (403) moves out of the annular mud collection groove (205). The positioning pins (405) cooperate with the positioning holes (208) to limit the circumferential rotation of the annular seat (4) and the rotating drum (5).

8. The stone processing wastewater treatment device as described in claim 1 or 7, characterized in that, The bottom of the sedimentation chamber (1) has a funnel-shaped structure. The sedimentation chamber (1) includes a sedimentation chamber (11) and a confluence chamber (12) surrounding the outside of the sedimentation chamber (11), so that the upper layer of clear water in the sedimentation chamber (11) overflows into the confluence chamber (12) from the upper edge of the sedimentation chamber (11); the confluence chamber (12) is connected to a drain pipe (102).

9. The stone processing wastewater treatment device as described in claim 1 or 7, characterized in that, The structure of the thickening and sludge discharge chamber (3) is the same as that of the sedimentation chamber (1).

10. A wastewater treatment process for stone processing, characterized in that, The wastewater treatment device for stone processing as described in any one of claims 1-9 includes the following steps: Step 1: Preliminary flocculation and filtration. During the process of injecting sewage into the reaction chamber (21), coagulant is added so that the coagulant and sewage are mixed in the reaction chamber (21). Through continuous injection, the sewage inside the reaction chamber (21) passes through the filter plate (23) from bottom to top, thus achieving sewage filtration. The filtered sewage overflows into the overflow collection chamber (22). Step 2: Flocculation and sedimentation. The sewage in the overflow collection chamber (22) is injected into the sedimentation chamber (11) by a water pump for sedimentation. The upper layer of clear water in the sedimentation chamber (11) overflows into the confluence chamber (12) from the upper edge of the sedimentation chamber (11). Step 3: Concentration and sludge discharge. The sediment in the reaction chamber (21) and sedimentation chamber (11) is discharged into the concentration and sludge discharge chamber (3) and discharged through the concentration and sludge discharge chamber (3). This also includes a cleaning step for the filter plate (23), specifically including: S1: Stop injecting wastewater into the reaction chamber (21); S2: Open the second mud pipe (24), and use the sewage water level in the reaction chamber (21) to make the sewage above the filter plate (23) backwash the filter plate (23) to clean the filter plate (23).

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