A multi-stage treatment device for sodium carboxymethyl cellulose wastewater

Abstract

The application relates to the technical field of wastewater treatment, in particular to a multi-stage sodium carboxymethyl cellulose wastewater treatment device, which comprises a treatment seat, a primary treatment part and a secondary treatment part are arranged above the treatment seat, the primary treatment part and the secondary treatment part are connected through a conveying pipeline, the primary treatment part comprises a sedimentation tank, a shielding grid is arranged on the side wall of the sedimentation tank, the secondary treatment part comprises a plurality of steam pipes which are connected through pipelines, a slag scraping plate is arranged above the sedimentation tank, the slag scraping plate can move above the sedimentation tank and scrape off the floating slag above the sedimentation tank; by controlling the slag scraping plate above the sedimentation tank to move along the transmission direction of the wastewater, the bottom of the slag scraping plate can scrape off the floating slag layer, so that the floating slag layer cannot enter the subsequent secondary treatment part along the transmission direction of the wastewater, that is, the floating slag layer cannot block the filler or membrane assembly of the subsequent secondary treatment part.

Description

Technical Field

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

[0002] Sodium carboxymethyl cellulose is a cellulose derivative widely used in papermaking, textiles, and pharmaceuticals. The wastewater generated during its production process is characterized by high salt content, high COD, and high viscosity.

[0003] Existing technologies have also proposed a solution for wastewater treatment. For example, a Chinese patent application with publication number CN117069180A discloses a wastewater treatment device, which includes a physical filtration chamber, a chemical reaction chamber, and a disinfection chamber connected in sequence. The physical filtration chamber is equipped with a filtration component, the chemical reaction chamber is equipped with a drive mechanism at the top, the output shaft of the drive mechanism is equipped with a stirring mechanism, the disinfection chamber is equipped with a disinfection component and a partition plate, the partition plate is located below the disinfection component, and a third drain pipe is provided at the bottom of the disinfection chamber.

[0004] Although the above technical solution improves the wastewater treatment effect, there are still other problems in its actual use. When treating sodium carboxymethyl cellulose wastewater, chemical reagents need to be added to form flocculation and sedimentation. These flocs will float to the water surface and form a scum layer. It is quite troublesome to deal with these scum layers. If they are not dealt with in time, they may enter the subsequent treatment process along the direction of wastewater transmission, affecting the continued treatment of wastewater.

[0005] Therefore, it is necessary to provide a multi-stage treatment device for sodium carboxymethyl cellulose wastewater to solve the above problems.

[0006] It should be noted that the information disclosed in this background section is only for understanding the background technology of the present invention, and therefore may include information that does not constitute prior art. Summary of the Invention

[0007] The technical solution adopted by the present invention to solve its technical problem is: a multi-stage treatment device for sodium carboxymethyl cellulose wastewater, including a treatment base, a primary treatment section and a secondary treatment section installed above the treatment base, the primary treatment section and the secondary treatment section being connected by a conveying pipeline, the primary treatment section including a sedimentation tank, the side wall of the sedimentation tank being provided with a shielding grid, the secondary treatment section including multiple steam pipes, the steam pipes being connected by a pipeline, and a scraper plate being provided above the sedimentation tank, the scraper plate being able to move above the sedimentation tank and scrape off the floating scum above it.

[0008] Further, the upper portion of the sedimentation tank is provided with annular tracks, two annular tracks are symmetrically arranged relative to the sedimentation tank, each annular track is internally provided with an annular groove, and the slag scraping plate is arranged in the annular groove.

[0009] Further, the inner wall of the annular groove is provided with a limiting ring groove, the groove wall of the limiting ring groove is rotationally provided with two driving wheels, the shape of the driving wheel is matched with the shape of the limiting ring groove, the surface of the driving wheel is provided with a connecting frame, and the slag scraping plate is arranged between the two connecting frames.

[0010] Further, the slag scraping plate is designed to be inclined relative to the horizontal plane, the surface of the slag scraping plate is provided with a plurality of water permeable grooves, the plurality of water permeable grooves are irregularly arranged on the surface of the slag scraping plate, and the upper edge of the sedimentation tank is provided with a floating slag groove; during operation, since the slag scraping plate is designed to be inclined relative to the horizontal plane and the surface of the slag scraping plate is provided with water permeable grooves, the slag scraping plate can not only reduce the moving pressure of the slag scraping plate when moving along the upper portion of the sedimentation tank, but also quickly push the floating slag away to the floating slag groove.

[0011] Further, the side wall of the annular track is provided with a support frame, the side wall of the support frame is provided with a scraper, the slag scraping plate is rotationally arranged on the surface of the connecting frame through a rotating column, and the surface of the slag scraping plate is in contact with the end portion of the scraper when the slag scraping plate moves along the inside of the limiting ring groove; during operation, the two driving wheels drive the connecting frame and the slag scraping plate to move, which causes the slag scraping plate to gradually move from the upper portion of the sedimentation tank to the side of the scraper, and then the slag scraping plate gradually contacts the end portion of the scraper, and with the rotation of the slag scraping plate, the scraper moves on the surface of the slag scraping plate, that is, the scraper can scrape off the floating slag adhered to the slag scraping plate, thereby avoiding the problem that part of the floating slag adheres to the surface of the slag scraping plate instead of falling into the floating slag groove, which affects the subsequent cleaning of the floating slag layer by the slag scraping plate.

[0012] Further, the rotating column is rotationally arranged on the side wall of the connecting frame, the inside of the slag scraping plate is provided with a circular groove matched with the rotating column, the outer circumferential surface of the rotating column is sleeved with a torsional spring, the torsional spring is arranged in the circular groove, the side wall of the connecting frame is provided with a limiting stopper, and the end portion of the limiting stopper is in contact with the side wall of the slag scraping plate; when the surface of the slag scraping plate gradually separates from the end portion of the scraper, that is, the rotating column is no longer subjected to the pressure of the end portion of the scraper, the torsional spring drives the rotating column and the slag scraping plate to return to the initial position at a relatively fast speed under the elastic force of the torsional spring, so that the slag scraping plate swings at a relatively large amplitude, and thus part of the floating slag in the water permeable groove can be further shaken off under the swing of the slag scraping plate, thereby avoiding the blockage of the water permeable groove, and further facilitating the reciprocating scraping of the slag scraping plate on the floating slag layer.

[0013] Further, the side wall of the connecting frame is provided with a fixed support, the end of the fixed support is provided with a storage seat, the inside of the storage seat stores polyaluminum chloride and polyacrylamide, and the surface of the storage seat is provided with a discharge port; in operation, when the connecting frame moves in the limiting ring groove following the driving wheel, the connecting frame will drive the fixed support on the surface to move, the fixed support drives the storage seat on the surface to move on the sedimentation tank, so that the polyaluminum chloride and polyacrylamide in the inside of the storage seat will fall into the sedimentation tank below from the discharge port, and thus the contact area of the polyaluminum chloride and polyacrylamide with the wastewater in the sedimentation tank is increased, so that the polyaluminum chloride and polyacrylamide can be flocculated and precipitated, and the gelatinous flocculation with a density smaller than that of brine can be removed, and the operation is convenient and simple without manual operation.

[0014] Further, the inside of the storage seat is fixedly provided with a baffle plate one, the baffle plate one is used for shielding the discharge port, the inside of the storage seat is slidably provided with a baffle plate two, the baffle plate two is in contact with the baffle plate one, the surface of the baffle plate two and the baffle plate one is provided with a material transmission groove, and the side wall of the annular track is provided with a pressure unit, and the pressure unit is used for driving the baffle plate two to move.

[0015] Further, the pressure unit comprises a plurality of pressure arc plates, and the pressure arc plates are designed on the side wall of the annular track; when the storage seat drives the baffle plate two to move, the end of the baffle plate two is in contact with the arc surface of the pressure arc plate; in operation, when the storage seat moves above the sedimentation tank following the fixed support, the end of the baffle plate two is in contact with the arc surface of the pressure arc plate, and the pressure arc plate extrudes the end of the baffle plate two, so that the baffle plate two moves relative to the baffle plate one, and the material transmission groove on the surface of the baffle plate two and the material transmission groove on the surface of the baffle plate one gradually correspond, so that the falling amount of the polyaluminum chloride and polyacrylamide can be conveniently controlled.

[0016] Further, the inside of the storage seat is provided with a sliding groove matched with the baffle plate two, and a supporting spring is installed in the sliding groove, and the upper end surface of the supporting spring is in contact with the lower end surface of the baffle plate two.

[0017] The beneficial effects of the present application are: the provided carboxymethyl cellulose sodium wastewater multi-stage treatment device, when the end of the scraper is in contact with the surface of the slag scraper during the moving process of the slag scraper, the end of the scraper will give the slag scraper a certain pressure, and since the slag scraper is designed on the surface of the connecting frame through the rotating column, under the pressure of the end of the scraper, the slag scraper will rotate at a certain amplitude, and the slag scraper will drive the rotating column to rotate and the torsional spring to wind, so that the movement of the scraper on the surface of the slag scraper can be facilitated, and under the limiting of the limiting block to the side wall of the slag scraper, the problem that the rotation amplitude of the slag scraper is too large and affects the use of the slag scraper itself can be avoided.

[0018] In addition to the objects, features and advantages described above, the present application has other objects, features and advantages. These and other objects, features and advantages of the present application will become apparent to those skilled in the art upon a reading of the following detailed description. BRIEF DESCRIPTION OF DRAWINGS

[0019] The accompanying drawings, which form a part of this specification, are included to provide a further understanding of the application, and are incorporated by reference in their entirety. The embodiments depicted herein are provided by way of example only, and together with the specification serve to explain the application. In the drawings:

[0020] Figure 1 is a schematic diagram of the entire application;

[0021] Figure 2 is a schematic diagram of the structure of the sedimentation tank in the application;

[0022] Figure 3 is a schematic diagram of the structure of the slag scraping plate in the application;

[0023] Figure 4 is a schematic diagram of the structure of the scraper in the application;

[0024] Figure 5 is a schematic diagram of the structure of the ring track in the application;

[0025] Figure 6 is a schematic diagram of the structure of the connecting frame in the application;

[0026] Figure 7 is a schematic diagram of the structure of the rotating column in the application;

[0027] Figure 8 is a schematic diagram of the structure of the limiting stopper in the application;

[0028] Figure 9 is a schematic diagram of the structure of the storage seat in the application;

[0029] Figure 10 is a schematic diagram of the structure of the material permeation groove in the application.

[0030] In the drawings, various reference numerals represent various features as follows:

[0031] 1, treatment seat; 2, primary treatment part; 3, secondary treatment part; 4, sedimentation tank; 401, shielding grid; 402, slag scraping plate; 403, rotating column; 5, ring track; 6, steam pipe; 7, ring groove; 8, limiting ring groove; 801, driving wheel; 9, connecting frame; 10, water permeation groove; 11, dross groove; 12, supporting frame; 13, scraper; 14, torsion spring; 15, limiting stopper; 16, fixed supporting frame; 17, storage seat; 171, discharge port; 18, material blocking plate one; 19, material blocking plate two; 20, material permeation groove; 21, pressure arc plate; 22, supporting spring. DETAILED DESCRIPTION

[0032] It should be noted that the embodiments in the present application and the features in the embodiments can be combined with each other without conflict. The present application will be described in detail below with reference to the accompanying drawings and in combination with the embodiments.

[0033] In order for those skilled in the art to better understand the present application, the technical solutions in the embodiments of the present application will be described clearly and completely below in combination with the drawings in the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, not all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor should belong to the protection scope of the present application.

[0034] As shown in Figures 1 to 10 The present application provides a carboxymethyl cellulose sodium wastewater multistage treatment device, which comprises a treatment seat 1, a primary treatment part 2 and a secondary treatment part 3 are installed above the treatment seat 1, the primary treatment part 2 and the secondary treatment part 3 are connected through a conveying pipeline, the primary treatment part 2 comprises a sedimentation tank 4, a shielding grid 401 is arranged on the side wall of the sedimentation tank 4, the secondary treatment part 3 comprises a plurality of steam pipes 6, the steam pipes 6 are connected through pipelines, a slag scraping plate 402 is arranged above the sedimentation tank 4, the slag scraping plate 402 can move above the sedimentation tank 4 and scrape off the floating slag above it

[0035] Carboxymethyl cellulose sodium is a cellulose derivative widely used in papermaking, textile, medicine and other fields. The wastewater in the production process has the characteristics of high salt, high COD and high viscosity.

[0036] In the specific treatment process, the wastewater first passes through the shielding grid 401 of the sedimentation tank 4, so that the shielding grid 401 first preliminarily intercepts large particle substances, then polyaluminum chloride and polyacrylamide are added for flocculation and sedimentation to remove gelatinous flocculus with a density less than salt water, that is, gelatinous flocculus with a density less than water is formed. These flocculus will float to the water surface to form a floating slag layer,

[0037] Then the slag scraping plate 402 above the sedimentation tank 4 is controlled to move along the transmission direction of the wastewater, so that the bottom of the slag scraping plate 402 can scrape off the floating slag layer, preventing the floating slag layer from entering the subsequent secondary treatment part 3 along the transmission direction of the wastewater, that is, preventing it from blocking the filler or membrane assembly of the subsequent secondary treatment part 3.

[0038] Subsequently, the preliminarily treated wastewater will enter the secondary treatment part 3 through the pipeline, and the secondary treatment part 3 will further oxidize the wastewater to degrade the organic matter inside. It should be noted that the treatment method of the secondary treatment part 3 is prior art, which will not be described in detail in the embodiments of the present application.

[0039] The upper portion of the sedimentation tank 4 is provided with annular tracks 5, two annular tracks 5 are symmetrically arranged relative to the sedimentation tank 4, and the inner portion of each annular track 5 is provided with an annular groove 7, and the slag scraping plate 402 is arranged in the annular groove 7;

[0040] During operation, since the slag scraping plate 402 is arranged in the annular groove 7, the moving mode of the slag scraping plate 402 is that the slag scraping plate 402 is first moved above the bottom of the annular groove 7 along the direction of the wastewater flow, so that the slag scraping plate 402 scrapes the floating slag layer, and then the slag scraping plate 402 is moved from the bottom of the annular groove 7 to the upper portion of the groove, that is, the slag scraping plate 402 is separated from the upper portion of the sedimentation tank 4, and then the slag scraping plate 402 enters the sedimentation tank 4 again from the upper portion of the annular groove 7. The design can make the slag scraping plate 402 move reciprocally, so that the floating slag layer can be scraped reciprocally. At the same time, the moving mode of the slag scraping plate 402 is changed to the mode of scraping first, separating second, and scraping again. In this way, the problem that part of the gelatinous floc is brought back to the initial end of the sedimentation tank 4 due to the direct recovery of the slag scraping plate 402 to the initial position on the sedimentation tank 4 can be avoided.

[0041] The inner wall of the annular groove 7 is provided with a limiting ring groove 8, the groove wall of the limiting ring groove 8 is rotationally provided with two drive wheels 801, the shape of the drive wheel 801 is matched with the shape of the limiting ring groove 8, the surface of the drive wheel 801 is provided with a connecting frame 9, and the slag scraping plate 402 is arranged between the two connecting frames 9.

[0042] It should be noted that the drive wheel 801 is connected with the controller through a power line, during operation, the drive wheel 801 is driven to rotate by the controller, the two drive wheels 801 rotate in the limiting ring groove 8, and the two drive wheels 801 drive the connecting frame 9 and the slag scraping plate 402 to move. The slag scraping plate 402 scrapes the floating slag layer according to the above moving mode. Under the mutual limitation of the drive wheel 801 and the limiting ring groove 8, the stability of the connecting frame 9 and the slag scraping plate 402 during the movement can be ensured, and the problem that the slag scraping plate 402 is deflected due to the impact of the wastewater can be avoided, thereby facilitating the scraping of the floating slag layer.

[0043] The slag scraping plate 402 is designed to be inclined relative to the horizontal plane, and the surface of the slag scraping plate 402 is provided with a plurality of water permeable grooves 10, the plurality of water permeable grooves 10 are irregularly arranged on the surface of the slag scraping plate 402, and the upper edge of the sedimentation tank 4 is provided with a floating slag groove 11. During operation, since the slag scraping plate 402 is designed to be inclined relative to the horizontal plane, and the surface of the slag scraping plate 402 is provided with water permeable grooves 10, when the slag scraping plate 402 moves above the sedimentation tank 4, the moving pressure of the slag scraping plate 402 can be reduced, and the floating slag can be pushed into the floating slag groove 11 as soon as possible.

[0044] The side wall edge of the annular track 5 is provided with a support frame 12, the side wall of the support frame 12 is provided with a scraper 13, the scraper 402 is designed to rotate on the surface of the connecting frame 9 through a rotating column 403, and the surface of the scraper 402 is in contact with the end of the scraper 13 when moving along the inside of the limiting ring groove 8.

[0045] When working, the two driving wheels 801 drive the connecting frame 9 and the scraper 402 to move, which makes the scraper 402 gradually move from above the sedimentation tank 4 to the side of the scraper 13, and then the scraper 402 gradually contacts the end of the scraper 13, and with the rotation of the scraper 402, the scraper 13 moves on the surface of the scraper 402, that is, the scraper 13 can scrape off the dross adhered to the scraper 402, avoiding that part of the dross does not fall into the dross groove 11 but adheres to the surface of the scraper 402, thereby avoiding the problem that the subsequent scraper 402 cannot clean the dross layer.

[0046] The rotating column 403 is rotatably installed on the side wall of the connecting frame 9, the inside of the scraper 402 is provided with a circular groove matched with the rotating column 403, the outer periphery of the rotating column 403 is sleeved with a torsional spring 14, the torsional spring 14 is arranged in the circular groove, and the side wall of the connecting frame 9 is provided with a limiting stopper 15, the end of the limiting stopper 15 is in contact with the side wall of the scraper 402.

[0047] When working, when the end of the scraper 13 contacts the surface of the scraper 402 during the movement of the scraper 402, the end of the scraper 13 gives the scraper 402 a certain pressure, and since the scraper 402 is designed to rotate on the surface of the connecting frame 9 through the rotating column 403, under the pressure of the end of the scraper 13, the scraper 402 rotates at a certain amplitude, and the scraper 402 drives the rotating column 403 to rotate and the torsional spring 14 to wind, which facilitates the movement of the scraper 13 on the surface of the scraper 402, and under the limiting of the limiting stopper 15 on the side wall of the scraper 402, the rotation amplitude of the scraper 402 is prevented from being too large, thereby avoiding the problem that the use of the scraper 402 is affected.

[0048] When the surface of the scraper 402 gradually separates from the end of the scraper 13, that is, the rotating column 403 is no longer subjected to the pressure of the end of the scraper 13, under the elastic force of the torsional spring 14, the torsional spring 14 drives the rotating column 403 and the scraper 402 to recover to the initial position at a relatively fast speed, so that the scraper 402 swings at a relatively large amplitude, and thus under the swing, part of the dross in the water permeable groove 10 is further shaken off, avoiding the blockage of the water permeable groove 10, thereby facilitating the reciprocating scraping of the scraper 402 on the dross layer.

[0049] The side wall of the connecting frame 9 is provided with a fixed support frame 16, the end of the fixed support frame 16 is provided with a storage seat 17, the inside of the storage seat 17 stores polyaluminum chloride and polyacrylamide, and the surface of the storage seat 17 is provided with a discharge port 171;

[0050] In work, when the connecting frame 9 moves in the limiting ring groove 8 following the driving wheel 801, the connecting frame 9 drives the fixed support frame 16 on the surface to move, the fixed support frame 16 drives the storage seat 17 on the surface to move on the sedimentation tank 4, so the polyaluminum chloride and polyacrylamide in the storage seat 17 fall into the sedimentation tank 4 below from the discharge port 171, which can improve the contact area of the polyaluminum chloride and polyacrylamide with the wastewater in the sedimentation tank 4, so as to ensure that the polyaluminum chloride and polyacrylamide flocculate and precipitate, remove the gelatinous flocculation with a density less than salt water, and do not need manual operation, which is convenient and simple.

[0051] The inside of the storage seat 17 is fixedly provided with a material blocking plate one 18, the material blocking plate one 18 is used for shielding the discharge port 171, the inside of the storage seat 17 is slidably provided with a material blocking plate two 19, the material blocking plate two 19 contacts the material blocking plate one 18, the surfaces of the material blocking plate two 19 and the material blocking plate one 18 are provided with material transmission grooves 20, and the side wall of the annular track 5 is provided with a pressure unit, which is used for driving the material blocking plate two 19 to move;

[0052] In work, in the initial state, the material transmission groove 20 on the surface of the material blocking plate two 19 and the material transmission groove 20 on the surface of the material blocking plate one 18 do not correspond, that is, the polyaluminum chloride and polyacrylamide in the inside cannot fall out of the discharge port 171;

[0053] When the storage seat 17 moves above the sedimentation tank 4 following the fixed support frame 16, the storage seat 17 contacts the pressure unit in the moving process, the pressure unit extrudes the end of the material blocking plate two 19, so that the material blocking plate two 19 moves relative to the material blocking plate one 18, that is, the material transmission groove 20 on the surface of the material blocking plate two 19 and the material transmission groove 20 on the surface of the material blocking plate one 18 gradually correspond, then the polyaluminum chloride and polyacrylamide fall out of the mutually coinciding material transmission grooves 20 and the discharge port 171, which can conveniently control the falling amount of the polyaluminum chloride and polyacrylamide, and further facilitate the combination of the polyaluminum chloride and polyacrylamide with the wastewater, and improve the treatment efficiency of the wastewater.

[0054] The pressure unit comprises pressure arc plates 21, a plurality of pressure arc plates 21 are designed on the side wall of the annular track 5, and the end of the material blocking plate two 19 contacts the arc surface of the pressure arc plate 21 when the storage seat 17 drives the material blocking plate two 19 to move;

[0055] When the storage seat 17 moves above the sedimentation tank 4 following the fixed support frame 16, the end of the second baffle plate 19 is in contact with the arc surface of the pressure arc plate 21, and the pressure arc plate 21 extrudes the end of the second baffle plate 19, so that the second baffle plate 19 moves relative to the first baffle plate 18, and the transparent slots 20 on the surfaces of the second baffle plate 19 and the first baffle plate 18 gradually correspond, so that the falling amount of polyaluminum chloride and polyacrylamide can be conveniently controlled.

[0056] The inside of the storage seat 17 is provided with a sliding groove matched with the second baffle plate 19, and a supporting spring 22 is installed in the sliding groove.

[0057] Working principle: The wastewater first passes through the shielding grid 401 of the sedimentation tank 4, so that the shielding grid 401 first preliminarily intercepts large particle substances, and then polyaluminum chloride and polyacrylamide are added for flocculation and sedimentation to remove gelatinous flocculi with a density less than salt water, i.e., gelatinous flocculi with a density less than water are formed, which float to the water surface to form a scum layer,

[0058] Then, by controlling the movement of the scum scraping plate 402 above the sedimentation tank 4 along the transmission direction of the wastewater, the bottom of the scum scraping plate 402 can scrape the scum layer to prevent the scum layer from entering the subsequent secondary treatment part 3 along the transmission direction of the wastewater, i.e., to prevent the scum layer from blocking the filler or membrane assembly of the subsequent secondary treatment part 3; since the scum scraping plate 402 is designed inside the annular groove 7, the movement mode of the scum scraping plate 402 is: first moving above the bottom of the annular groove 7 along the direction of the wastewater flow, so that the scum scraping plate 402 scrapes the scum layer, and then the scum scraping plate 402 moves from the bottom of the annular groove 7 to above the groove, i.e., separates from above the sedimentation tank 4, and enters the side of the sedimentation tank 4 again along the top of the annular groove 7. By such a design, the scum scraping plate 402 can move reciprocally, so as to reciprocally scrape the scum layer, and the movement mode of the scum scraping plate 402 is changed to: first scraping, then separating, and then scraping again, so as to avoid the mode that the scum scraping plate 402 directly returns to the initial position on the sedimentation tank 4, which causes part of the gelatinous flocculi to be brought back to the initial end of the sedimentation tank 4.

[0059] Since the slag scraping plate 402 is designed to be inclined relative to the horizontal plane, and the water permeable groove 10 is opened on the surface thereof, when moving along the top of the sedimentation tank 4, not only the moving pressure of the slag scraping plate 402 can be reduced, but also the floating slag can be pushed away to the floating slag groove 11 as soon as possible; during the movement of the two driving wheels 801 driving the connecting frame 9 and the slag scraping plate 402, the slag scraping plate 402 will gradually move from the top of the sedimentation tank 4 to the side of the scraper 13, and then the slag scraping plate 402 will gradually contact the end of the scraper 13, and with the rotation of the slag scraping plate 402, the scraper 13 will move on the surface of the slag scraping plate 402, that is, the scraper 13 can scrape off the floating slag adhered to the slag scraping plate 402, avoiding that part of the floating slag does not fall into the floating slag groove 11 but adheres to the surface of the slag scraping plate 402, thereby affecting the subsequent cleaning of the floating slag layer by the slag scraping plate 402;

[0060] When the end of the scraper 13 contacts the surface of the slag scraping plate 402 during the movement of the slag scraping plate 402, the end of the scraper 13 will give the slag scraping plate 402 a certain pressure, and since the slag scraping plate 402 is designed to rotate on the surface of the connecting frame 9 through the rotating column 403, under the pressure of the end of the scraper 13, the slag scraping plate 402 will rotate at a certain amplitude, and the slag scraping plate 402 will drive the rotating column 403 to rotate and the torsional spring 14 to wind, which can facilitate the movement of the scraper 13 on the surface of the slag scraping plate 402, and under the limiting of the side wall of the slag scraping plate 402 by the limiting block 15, the rotation amplitude of the slag scraping plate 402 can be prevented from being too large, thereby affecting the use of the slag scraping plate 402 itself;

[0061] When the surface of the slag scraping plate 402 gradually separates from the end of the scraper 13, that is, the rotating column 403 is no longer subjected to the pressure of the end of the scraper 13, under the elastic force of the torsional spring 14, the torsional spring 14 will drive the rotating column 403 and the slag scraping plate 402 to recover to the initial position at a relatively fast speed, so that the slag scraping plate 402 will swing at a large amplitude, and thus under the swinging, part of the floating slag in the water permeable groove 10 can be shaken off, avoiding the blockage of the water permeable groove 10, thereby facilitating the reciprocating scraping of the slag scraping plate 402 on the floating slag layer; when the connecting frame 9 moves in the limiting ring groove 8 following the driving wheel 801, the connecting frame 9 will simultaneously drive the fixed support frame 16 on the surface thereof to move, the fixed support frame 16 drives the storage seat 17 on the surface thereof to move on the sedimentation tank 4, so that the polyaluminum chloride and polyacrylamide in the storage seat 17 will fall from the discharge port 171 into the sedimentation tank 4 below, and thus the design can increase the contact area of the polyaluminum chloride and polyacrylamide with the wastewater in the sedimentation tank 4, thereby ensuring that the polyaluminum chloride and polyacrylamide are flocculated and precipitated to remove the gelatinous flocculus with a density smaller than that of salt water, and without manual operation of the staff, the operation is relatively convenient and simple;

[0062] In the initial state, the transparent grooves 20 on the surface of the second baffle 19 and the transparent grooves 20 on the surface of the first baffle 18 do not correspond, that is, the polyaluminum chloride and polyacrylamide inside will not fall out of the discharge port 171;

[0063] When the storage seat 17 moves above the sedimentation tank 4 following the fixed support frame 16, the storage seat 17 will be in contact with the pressure unit during the movement, and the pressure unit will extrude the end of the second baffle 19, so that the second baffle 19 moves relative to the first baffle 18, that is, the transparent grooves 20 on the surface of the second baffle 19 and the transparent grooves 20 on the surface of the first baffle 18 gradually correspond, and then the polyaluminum chloride and polyacrylamide will fall out of the mutually coinciding transparent grooves 20 and the discharge port 171, so as to facilitate the control of the falling amount of the polyaluminum chloride and polyacrylamide, and then facilitate the combination of the polyaluminum chloride and polyacrylamide with the wastewater, and improve the treatment efficiency of the wastewater; when the storage seat 17 moves above the sedimentation tank 4 following the fixed support frame 16, the end of the second baffle 19 will be in contact with the arc surface of the pressure arc plate 21, and the pressure arc plate 21 will extrude the end of the second baffle 19, so that the second baffle 19 moves relative to the first baffle 18, and the transparent grooves 20 on the surface of the second baffle 19 and the transparent grooves 20 on the surface of the first baffle 18 gradually correspond, so as to facilitate the control of the falling amount of the polyaluminum chloride and polyacrylamide.

[0064] The above only describes the preferred embodiments of the present application and is not used to limit the present application. For those skilled in the art, the present application can have various modifications and changes. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A multi-stage treatment device for sodium carboxymethyl cellulose wastewater, characterized in that: The system includes a treatment base, on which a primary treatment section and a secondary treatment section are installed. The primary treatment section and the secondary treatment section are connected by a conveying pipeline. The primary treatment section includes a sedimentation tank with a shielding grid on its side wall. The secondary treatment section includes multiple steam pipes connected by a pipeline. A scum scraper is installed above the sedimentation tank and can move above the sedimentation tank to scrape off the floating scum. An annular track is installed above the sedimentation tank. Two annular tracks are provided and are designed symmetrically with respect to the sedimentation tank. Each annular track has an annular groove inside, and the slag scraper is set inside the annular groove. The inner wall of the annular groove is provided with a limiting annular groove. Two drive wheels are rotatably arranged on the groove wall of the limiting annular groove. The shape of the drive wheels is adapted to the shape of the limiting annular groove. A connecting frame is installed on the surface of the drive wheels. The slag scraper is designed between the two connecting frames. The side wall of the connecting frame is equipped with a fixed support, and the end of the fixed support is equipped with a storage seat. The storage seat contains polyaluminum chloride and polyacrylamide, and the surface of the storage seat is provided with a discharge port. A baffle plate is fixedly installed inside the storage seat to block the discharge port. A baffle plate is slidably arranged inside the storage seat and contacts the baffle plate. Both the baffle plate and the baffle plate are provided with material passage grooves. A pressure unit is provided on the side wall of the annular track to drive the baffle plate to move. The pressure unit includes multiple pressure arc plates, which are designed on the side wall of the annular track. When the storage seat moves the second baffle plate, the end of the second baffle plate will contact the arc surface of the pressure arc plate.

2. The multi-stage treatment device for sodium carboxymethyl cellulose wastewater according to claim 1, characterized in that: The slag scraper is designed to be inclined relative to the horizontal plane, and multiple water permeable grooves are opened on the surface of the slag scraper. The multiple water permeable grooves are irregularly designed on the surface of the slag scraper, and a scum trough is provided at the upper edge of the sedimentation tank.

3. The multi-stage treatment device for sodium carboxymethyl cellulose wastewater according to claim 2, characterized in that: A support frame is installed at the edge of the side wall of the annular track, and a scraper is installed on the side wall of the support frame. The scraper is designed to rotate on the surface of the connecting frame via a rotating column. When the scraper moves along the inside of the limiting annular groove, the surface of the scraper will contact the end of the scraper.

4. The multi-stage treatment device for sodium carboxymethyl cellulose wastewater according to claim 3, characterized in that: The rotating column is rotatably mounted on the side wall of the connecting frame. The inside of the slag scraper is provided with a circular groove that matches the rotating column. A torsion spring is sleeved on the outer circumferential surface of the rotating column. The torsion spring is located inside the circular groove. The side wall of the connecting frame is provided with a limit block. The end of the limit block contacts the side wall of the slag scraper.

5. The multi-stage treatment device for sodium carboxymethyl cellulose wastewater according to claim 1, characterized in that: The storage base has a groove inside that matches the second baffle plate. A support spring is installed in the groove, and the upper end face of the support spring contacts the lower end face of the second baffle plate.

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