A purification method for circulating water scrubbing with quartz sand and alkali

Abstract

The application relates to the technical field of quartz sand alkali scrubbing circulating water treatment, and discloses a purification treatment method of quartz sand alkali scrubbing circulating water, which comprises a purification box, a plurality of partitions are fixedly connected in the purification box, and flow-through openings are formed in the partitions. The purification treatment method of quartz sand alkali scrubbing circulating water is characterized in that: a connecting agent, a surfactant and a solubilizer are added into the treated alkali scrubbing circulating water, and are simultaneously introduced into the purification device, so that the mud and humus in the alkali scrubbing circulating water react with the medicines to produce complex flocculation. Then, air is blown through the purification device, the bubbles drive the complex flocculation to float upwards to the water surface, and then the complex flocculation is cleaned out. Then, the cleaned complex flocculation is introduced into a plate-and-frame filter press for treatment, so that the alkali water in the complex flocculation is separated out, the treated alkali water is reused, and the mud and humus in the alkali scrubbing circulating water are fully and effectively removed.

Description

Technical Field

[0001] This invention relates to the field of quartz sand alkaline scrubbing circulating water treatment technology, specifically to a purification treatment method for quartz sand alkaline scrubbing circulating water. Background Technology

[0002] Given the scarcity of non-metallic mineral resources and the depletion of high-grade mineral resources, lower-grade non-metallic minerals have become the main focus of mining, especially in the field of quartz beneficiation. For these lower-grade quartz ores or quartz sands, more complex beneficiation processes and procedures are needed to enrich and purify the quartz. Alkali rubbing is an indispensable beneficiation process for these low-grade quartz ores or quartz sands. However, alkali rubbing operations generate a large amount of mud and humus (mud and humus adhering to the surface of the quartz sand are stripped off during the alkali rubbing process). This large amount of mud and humus can negatively impact the alkali rubbing operation, thus affecting the final refined sand index of the entire beneficiation process. This invention proposes a purification system for circulating water in the alkali rubbing of quartz sand, achieving perfect separation of mud and humus from the water in the alkali rubbing water.

[0003] The settling speed of mud and humus in alkaline water is slow and unstable under natural conditions (affected by water flow disturbance). The common method is to directly use a plate and frame filter press for mud-water separation. This method increases the workload and production cost, and also has the problem of poor treatment effect on mud and humus in alkaline water. Summary of the Invention

[0004] The purpose of this invention is to provide a purification treatment method for circulating water scrubbed with quartz sand and alkali, thereby overcoming the shortcomings in the aforementioned background technology.

[0005] The objective of this invention can be achieved through the following technical solutions:

[0006] A method for purifying circulating water through alkaline scrubbing with quartz sand includes the following steps:

[0007] Step 1: Add a combination of binder, surfactant and cosolvent to the alkaline scrubbing circulating water, and then pass it through a pipeline into the purification device for purification and filtration.

[0008] Step 2: After the alkaline scrubbing circulating water containing a combination of binder, surfactant and cosolvent enters the purification device, it reacts with the added drugs, and the mud and humus in the alkaline water form complex flocs.

[0009] Step 3: The alkaline scrubbing circulating water and the medicine from Step 2 circulate in the tank of the purification device to carry out a full chemical reaction, causing the mud and humus in the alkaline scrubbing circulating water to form complex flocs. At the same time, bubbles are generated at the bottom of the purification device to aerate the alkaline scrubbing circulating water, causing the complex flocs to float up. Then, the floated complex flocs are cleaned up to separate them from the alkaline scrubbing circulating water.

[0010] Step 4: Pass the separated complexed flocs into a plate and frame filter press for solid-liquid separation.

[0011] As a further embodiment of the present invention: the surfactant is a Gemini-type cationic bisquaternary ammonium salt. A certain mass of dibromooctane is weighed and poured into a three-necked flask, and a certain amount of hexadecylamine is added at the same time to ensure that the molar ratio of dibromoalkane to alkyl tertiary amine is about 1:1.5 to 1:4; ethanol is added as solvent, nitrogen gas is introduced, and the mixture is heated under reflux in an oil bath at 70 to 90°C. After 24 to 72 hours, the quaternization reaction is terminated, the synthetic product is recovered, and the target product is obtained.

[0012] As a further aspect of the present invention: the co-solvent is one or more of polysorbate, urea, and acetic acid, and the binder is one or more of serpentine, protein, animal glue, and sodium alginate.

[0013] As a further aspect of the present invention: the purification device includes a purification box, a plurality of partitions are fixedly connected inside the purification box, and the partitions are provided with flow ports. A water inlet pipe is fixedly connected to one side of the purification box, and a drain pipe is fixedly connected to the other side of the purification box. A blower is fixedly connected to the bottom of the purification box, and a first connecting pipe is fixedly connected to the output end of the blower. A plurality of second connecting pipes are fixedly connected to the first connecting pipe, and a plurality of third connecting pipes fixedly connected to the purification box are fixedly connected to the second connecting pipes. An air blowing hole is provided on the third connecting pipe. A complexed floc cleaning mechanism is provided on the purification box, and the complexed floc cleaning mechanism is used to automatically clean up the floating complexed flocs.

[0014] As a further aspect of the present invention: the complexed floc cleaning mechanism includes multiple mounting plates fixedly connected to the purification box, a first drive motor fixedly connected to the mounting plate, a threaded rod fixedly connected to the output end of the first drive motor via a coupling, a transmission plate slidably connected to the mounting plate on the outer surface of the threaded rod, a transmission rod slidably connected to the purification box fixedly connected to one side of the transmission plate, a push plate fixedly connected to one side of the transmission rod, a guide rod slidably connected to the mounting plate on the transmission plate, and a discharge trough opened on one side of the purification box.

[0015] As a further aspect of the present invention: a collection funnel is fixedly connected to one side of the purification box.

[0016] As a further aspect of the present invention: a support frame is fixedly connected to the bottom of the purification box.

[0017] The beneficial effects of this invention are:

[0018] (1) By adding a binder, surfactant, and co-solvent to the alkaline scrubbing circulating water and simultaneously introducing it into the purification device, the mud and humus in the alkaline scrubbing circulating water react with the drugs to produce complex flocs. At the same time, the physical properties of the surface of the complex flocs are changed, causing them to separate from the water. Then, the air is blown by the purification device, causing the bubbles to carry the complex flocs to float to the water surface. They are then cleaned out and then fed into a plate and frame filter press for further processing. The alkaline water in the complex flocs is separated out and the treated alkaline water is reused. This achieves a thorough and effective removal of mud and humus from the alkaline scrubbing circulating water, while reducing workload and production costs. The process is also relatively convenient.

[0019] (2) By adding a combination of binder, surfactant and cosolvent to the alkaline scrubbing circulating water and then introducing it into the purification tank, the alkaline scrubbing circulating water with added chemicals flows in a curved manner in the purification tank through the design of the partition and flow port. This greatly increases the reaction time between the alkaline scrubbing circulating water and the mixed chemicals. At the same time, by aerating the alkaline scrubbing circulating water and the mixed chemicals, the contact area between the alkaline scrubbing circulating water and the mixed chemicals is increased. Furthermore, by aerating the purification tank, the complex flocs generated by the reaction are floated. Then, the floating complex flocs are automatically cleaned out by the complex floc cleaning mechanism. This achieves thorough purification of the sludge and humus in the alkaline scrubbing circulating water, greatly improving the purification effect of the alkaline scrubbing circulating water. Attached Figure Description

[0020] The invention will now be further described with reference to the accompanying drawings.

[0021] Figure 1 This is a first perspective view of the external structure of the purification device of the present invention;

[0022] Figure 2 This is a second perspective view of the external structure of the purification device of the present invention;

[0023] Figure 3 This is a third perspective view of the external structure of the purification device of the present invention;

[0024] Figure 4 This is a fourth perspective view of the external structure of the purification device of the present invention;

[0025] Figure 5 This is the present invention. Figure 3A magnified view of A in the middle.

[0026] In the diagram: 1. Purification box; 2. Partition; 3. Transfer port; 4. Water inlet pipe; 5. Drain pipe; 6. Blower; 7. First connecting pipe; 8. Second connecting pipe; 9. Third connecting pipe; 10. Air vent; 11. Mounting plate; 12. First drive motor; 13. Threaded rod; 14. Transmission plate; 15. Transmission rod; 16. Push plate; 17. Guide rod; 18. Discharge chute; 19. Collection funnel. Detailed Implementation

[0027] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0028] Example 1

[0029] Please see Figures 1-5 As shown, this invention provides a purification method for circulating water used in quartz sand alkaline scrubbing, comprising the following steps:

[0030] Step 1: Add a combination of binder, surfactant and cosolvent to the alkaline scrubbing circulating water, and then pass it through a pipeline into the purification device for purification and filtration.

[0031] Step 2: After the alkaline scrubbing circulating water containing a combination of binder, surfactant and cosolvent enters the purification device, it reacts with the added drugs, and the mud and humus in the alkaline water form complex flocs.

[0032] Step 3: The alkaline scrubbing circulating water and the medicine from Step 2 circulate in the tank of the purification device to carry out a full chemical reaction, causing the mud and humus in the alkaline scrubbing circulating water to form complex flocs. At the same time, bubbles are generated at the bottom of the purification device to aerate the alkaline scrubbing circulating water, causing the complex flocs to float up. Then, the floated complex flocs are cleaned up to separate them from the alkaline scrubbing circulating water.

[0033] Step 4: Pass the separated complexed flocs into a plate and frame filter press for solid-liquid separation. The plate and frame filter press is existing technology, so it will not be described in detail here.

[0034] The surfactant is a Gemini-type cationic bisquaternary ammonium salt. A certain mass of dibromooctane is weighed and poured into a three-necked flask, and a certain amount of hexadecylamine is added at the same time to ensure that the molar ratio of dibromoalkane to alkyl tertiary amine is about 1:1.5 to 1:4. Ethanol is added as solvent, nitrogen gas is introduced, and the mixture is heated under reflux in an oil bath at 70 to 90°C. After 24 to 72 hours, the quaternization reaction is terminated, the synthetic product is recovered, and the target product is obtained.

[0035] The co-solvent is one or more of polysorbate, urea, and acetic acid, and the binder is one or more of serpentine, protein, animal glue, and sodium alginate.

[0036] By adding a binder, surfactant, and co-solvent to the alkaline scrubbing circulating water and simultaneously introducing it into a purification device, the mud and humic substances in the alkaline scrubbing circulating water react with the chemicals to produce complex flocs. This alters the physical properties of the surface of the complex flocs, causing them to separate from the water. Subsequently, air is blown through the purification device, causing the bubbles to carry the complex flocs to the surface for cleaning. The cleaned complex flocs are then fed into a plate and frame filter press for further processing, separating the alkaline water from the complex flocs. The treated alkaline water can then be reused. This method reduces workload and production costs, effectively removing mud and humic substances from the alkaline scrubbing circulating water, and is relatively convenient.

[0037] Please refer to Tables 1 and 2. This invention utilizes a mixed solvent to treat alkaline circulating water. It mainly employs binders, surfactants, and co-solvents to separate the silt and sand in the alkaline circulating water into solid and liquid components. The specific experimental steps are as follows:

[0038] The surfactant is a synthetic quaternary ammonium salt. A certain mass of 1,8-dibromooctane is weighed and poured into a three-necked flask, and a certain amount of hexadecylamine is added simultaneously to ensure that the molar ratio of dibromoalkane to alkyl tertiary amine is approximately 1:1.5 to 1:4. Ethanol is added as solvent, nitrogen gas is introduced, and the mixture is heated under reflux in an oil bath at 70–90°C. The quaternization reaction terminates after 24–72 hours. The synthetic product is recovered to obtain the target product.

[0039] Take a certain amount of alkali to wipe the circulating water, stir it thoroughly to avoid stratification, and obtain homogenized circulating water.

[0040] Take 1000 ml of homogenized alkaline circulating water and collect its supernatant after standing for 5 min, 10 min, 20 min, and 30 min, and measure the change in turbidity value.

[0041] The synthesized surfactant is mixed with a cosolvent, a linker, and water in a certain proportion, wherein the surfactant accounts for 15-35%, the cosolvent accounts for 10-20%, the linker accounts for 20-30%, and the remaining water is mixed and stirred evenly.

[0042] Take the alkaline circulating water mixed in the previous step and pour it into a 1000ml standard beaker. Stir continuously in the beaker to ensure the homogenization of the alkaline water.

[0043] Take 5 ml of the mixed solvent prepared above and add it to the homogenized alkaline water. Stir continuously for 10 min to allow the mixed solvent and alkaline water to fully react and come into contact. Let it stand for 0.5 h and observe the changes in the mixed solution. Take the clear liquid and measure its turbidity value.

[0044] Take 5 ml of the mixed solvent and 1000 ml of alkaline circulating water respectively, shorten the stirring time to 5 min, let it stand for 0.5 h, observe the changes in the mixed solution, and take the clear liquid to measure its turbidity value.

[0045] Take 5 ml of the mixed solvent and 1000 ml of alkaline circulating water respectively, stir for 5 min, let stand for 20 min, observe the changes in the mixed solution, and take the clear liquid to measure its turbidity value.

[0046] Take 5 ml of the mixed solvent and 1000 ml of alkaline circulating water respectively, stir for 5 min, let stand for 10 min, observe the changes in the mixed solution, and take the clear liquid to measure its turbidity value.

[0047] Take 5 ml of the mixed solvent and 1000 ml of alkaline circulating water respectively, stir for 5 min, let stand for 5 min, observe the changes in the mixed solution, and take the clear liquid to measure its turbidity value.

[0048] Prepare a 0.1% (w / w) solution of the commonly used flocculant PAM.

[0049] Take 1000ml of alkaline circulating water and 5ml of the prepared PAM solution, stir for 5min, let stand for 30min, observe the changes in the solution, and take the supernatant to measure its turbidity value.

[0050] Take 1000ml of alkaline circulating water and 5ml of the prepared PAM solution, stir for 5min, let stand for 20min, observe the changes in the solution, and take the supernatant to measure its turbidity value.

[0051] Take 1000ml of alkaline circulating water and 5ml of the prepared PAM solution, stir for 5min, let stand for 10min, observe the changes in the solution, and take the supernatant to measure its turbidity value.

[0052] Take 1000ml of alkaline circulating water and 5ml of the prepared PAM solution, stir for 5min, let stand for 5min, observe the changes in the solution, and take the supernatant to measure its turbidity value.

[0053] Record the turbidity value after adding PAM and compare it with the turbidity value after treatment with a mixed solvent under the same conditions.

[0054] The beneficial effect of adopting the above measures is that, under the same conditions, the turbidity value of alkaline circulating water treated with mixed solvents is less than that of water treated with PAM.

[0055] Table 1 Comparison of treatment results of alkaline circulating water with different reagents

[0056]

[0057] Table 2 Comparison of fine sand indexes after alkaline circulating water is treated with different reagents

[0058]

[0059] Example 3

[0060] Based on Example 1, please refer to Figures 1-5 As shown, the purification device includes a purification box 1, with multiple partitions 2 fixedly connected inside the purification box 1. Each partition 2 has a flow port 3. A water inlet pipe 4 is fixedly connected to one side of the purification box 1, and a drain pipe 5 is fixedly connected to the other side. A blower 6 is fixedly connected to the bottom of the purification box 1. A first connecting pipe 7 is fixedly connected to the output end of the blower 6. Multiple second connecting pipes 8 are fixedly connected to the first connecting pipe 7. Multiple third connecting pipes 9, which are fixedly connected to the purification box 1, are fixedly connected to the second connecting pipes 8. Air vents 10 are provided on the third connecting pipes 9. A fibrous clump cleaning mechanism is provided on the purification box 1 to automatically clean up floating fibrous clumps.

[0061] The complexed floc removal mechanism includes multiple mounting plates 11 fixedly connected to the purification box 1. A first drive motor 12 is fixedly connected to the mounting plate 11. The first drive motor 12 is controlled by a PLC programming program, which can control the forward and reverse rotation and rotation angle of the first drive motor 12. A threaded rod 13 is fixedly connected to the output end of the first drive motor 12 through a coupling. A transmission plate 14 is slidably connected to the mounting plate 11 on the outer surface of the threaded rod 13. A transmission rod 15 is fixedly connected to one side of the transmission plate 14 and slidably connected to the purification box 1. A push plate 16 is fixedly connected to one side of the transmission rod 15. A guide rod 17 is slidably connected to the transmission plate 14 and fixedly connected to the mounting plate 11. A discharge trough 18 is provided on one side of the purification box 1.

[0062] A collection funnel 19 is fixedly connected to one side of the purification box 1.

[0063] A support frame is fixedly connected to the bottom of the purification box 1.

[0064] A combination of binder, surfactant, and co-solvent is added to the alkaline scrubbing circulating water and simultaneously introduced into the purification tank 1. Multiple reaction tanks are formed within the purification tank 1, separated by several partitions 2. First, the circulating water containing the mixed reagents enters the first reaction tank through the inlet pipe 4, allowing for a thorough chemical reaction between the alkaline scrubbing circulating water and the mixed reagents. Simultaneously, the water flow propels the mixture to the transfer port 3, facilitating its transfer to the next reaction tank. The reaction within the tank produces complexed flocs, which are then amplified by a blower 6. The blower 6 amplifies multiple third connecting pipes 9 through first connecting pipes 7 and second connecting pipes 8, causing the gas to be expelled through the vent holes 10. This process ensures that gas is generated evenly and fully in each reaction tank. The alkaline scrubbing circulating water and the mixed agent react fully to produce complex flocs. The gas then carries the complex flocs upward to float. Subsequently, the first drive motor 12 drives the threaded rod 13 to rotate. The threaded rod 13 drives the drive plate 14 and drive rod 15 to move. The drive rod 15 drives the push plate 16 to move. The push plate 16 pushes the floating complex flocs from the discharge trough 18 into the collection funnel 19 for collection. At the same time, the alkaline scrubbing circulating water and the mixed agent flow in a curved path in the purification tank 1, which greatly increases the reaction time and contact area between the alkaline scrubbing circulating water and the mixed agent. This achieves thorough purification of the sludge and humus in the alkaline scrubbing circulating water, greatly improving the purification effect of the alkaline scrubbing circulating water.

[0065] The working principle of this invention is as follows: A combination of binder, surfactant, and co-solvent is added to the alkaline scrubbing circulating water and simultaneously introduced into the purification tank 1. Multiple reaction tanks are formed within the purification tank 1 by partitions 2. First, the circulating water containing the mixed reagents enters the first reaction tank through the inlet pipe 4, allowing for a thorough chemical reaction between the alkaline scrubbing circulating water and the mixed reagents. Simultaneously, the water flow propels the mixture to the transfer port 3, facilitating its transfer to the next reaction tank. The reaction in the reaction tank produces complexed flocs, which are then amplified by a blower 6. The blower 6 amplifies multiple third connecting pipes 9 through first connecting pipes 7 and second connecting pipes 8, causing the third connecting pipes 9 to subsequently pass through the air vents 10. Gas is blown out to generate gas evenly in each reaction tank. The alkaline scrubbing circulating water and the mixed agent react fully to produce complex flocs. The gas then carries the complex flocs upward to float. Subsequently, the first drive motor 12 drives the threaded rod 13 to rotate. The threaded rod 13 drives the drive plate 14 and drive rod 15 to move. The drive rod 15 drives the push plate 16 to move. The push plate 16 pushes the floating complex flocs from the discharge trough 18 into the collection funnel 19 for collection. At the same time, the alkaline scrubbing circulating water and the mixed agent flow in a curved path in the purification tank 1, which greatly increases the reaction time and contact area between the alkaline scrubbing circulating water and the mixed agent. This achieves thorough purification of the sludge and humus in the alkaline scrubbing circulating water, greatly improving the purification effect of the alkaline scrubbing circulating water.

[0066] The foregoing has provided a detailed description of one embodiment of the present invention, but this description is merely a preferred embodiment and should not be construed as limiting the scope of the invention. All equivalent variations and modifications made within the scope of the claims of this invention should still fall within the patent coverage of this invention.

Claims

1. A purification treatment method of alkaline scrubbing circulating water of quartz sand, characterized by, It comprises the following steps: Step one, the alkaline scrubbing circulating water is added with a combination of connecting agent, surfactant and cosolvent, and then it is introduced into the purification device through a pipeline for purification filtration; Step two, after the alkaline scrubbing circulating water added with the combination of connecting agent, surfactant and cosolvent enters into the purification device, mud and humus in the alkaline water form complex flocculation due to the reaction with the added medicine; Step three, the alkaline scrubbing circulating water and the medicine in step two are circulated in the tank of the purification device to fully react, so that mud and humus in the alkaline scrubbing circulating water form complex flocculation, and at the same time, air bubbles are generated at the bottom of the purification device to aerate the alkaline scrubbing circulating water, so that the generated complex flocculation is floated, and then the floated complex flocculation is cleaned to separate it from the alkaline scrubbing circulating water; Step four, the separated complex flocculation is introduced into a plate-and-frame filter for solid-liquid separation; The cosolvent is one or a combination of poly sorbate, urea and acetic acid, and the connecting agent is one or a combination of serpentine, protein, animal glue and sodium alginate; The surfactant is a synthetic quaternary ammonium salt. The purification device comprises a purification tank (1), a plurality of partitions (2) are fixedly connected in the purification tank (1), a flow-through opening (3) is formed in the partitions (2), a water inlet pipe (4) is fixedly connected to one side of the purification tank (1), a water outlet pipe (5) is fixedly connected to the other side of the purification tank (1), a blower (6) is fixedly connected to the bottom of the purification tank (1), a first connecting pipe (7) is fixedly connected to the output end of the blower (6), a plurality of second connecting pipes (8) are fixedly connected to the first connecting pipe (7), a plurality of third connecting pipes (9) are fixedly connected to the second connecting pipes (8) and the purification tank (1), air holes (10) are arranged on the third connecting pipes (9), and a complex flocculation cleaning mechanism is arranged on the purification tank (1) and used for automatically cleaning the floated complex flocculation; The complex flocculation cleaning mechanism comprises a plurality of mounting plates (11) fixedly connected to the purification tank (1), a first transmission motor (12) is fixedly connected to the mounting plates (11), a threaded rod (13) is fixedly connected to the output end of the first transmission motor (12) through a shaft coupling, a transmission plate (14) in slidable connection with the mounting plates (11) is threadedly connected to the outer surface of the threaded rod (13), a transmission rod (15) in slidable connection with the purification tank (1) is fixedly connected to one side of the transmission plate (14), a push plate (16) is fixedly connected to one side of the transmission rod (15), a guide rod (17) fixedly connected to the mounting plates (11) is slidably connected to the transmission plate (14), a discharge chute (18) is formed in one side of the purification tank (1).

2. The purification method of the circulating water by alkali scrubbing of quartz sand according to claim 1, characterized in that, A collecting hopper (19) is fixedly connected to one side of the purification tank (1).

3. The method for purifying a quartz sand alkali scrubbing circulating water according to claim 1, characterized in that, A support frame is fixedly connected to the bottom of the purification tank (1).

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