A coating production water treatment device and treatment method thereof

Abstract

The present invention relates to the technical field of sewage treatment, in particular to a coating production water treatment device and a treatment method thereof, comprising a box, a support frame and a feed pipe arranged on the upper part of the box: an outer cylinder is installed inside the box, and the bottom of the outer cylinder extends to the outside of the box, and the inner cylinder reciprocates up and down inside the outer cylinder, and the sewage floating on the water surface is transferred to the inner cylinder by lowering the position of the inner cylinder; the upper part of the inner cylinder is connected to a collecting tank, the upper end of the collecting tank is open, and the height of the upper port of the collecting tank matches the liquid level of the sewage in the box, and the collecting tank is connected to the inside of the inner cylinder. The present invention uses a motor to drive the inner cylinder located inside the outer cylinder to achieve reciprocating up and down movement, so that the ester substances generated by the esterification reaction in the wastewater smoothly enter the inner side of the inner cylinder for centralized collection, and the ester substances in the wastewater are treated separately to protect the environment.

Description

Technical Field

[0001] The present invention relates to the technical field of sewage treatment, and in particular to a coating production water treatment device and a treatment method thereof. Background Art

[0002] Paint is a substance that is applied to the surface of an object and can form a solid coating film with protective, decorative or special properties. The main functions of paint include protection, decoration, concealing product defects and other special functions to enhance the value of the product. The service life of paint depends on different products.

[0003] During the paint production process, wastewater is generated in the resin synthesis, pigment production and other links. These wastewaters usually have high concentration, high color and high chemical oxygen demand (COD) values, and contain pollutants that are difficult to biodegrade, such as esters.

[0004] There is a publication number CN210825871U9, named a paint wastewater treatment device, including a housing, a reagent tank installed on one side of the top of the housing, a mixer installed on the other end of the top of the housing, a water pump installed on one side of the housing, a water outlet installed on the other side of the housing, a filtering mechanism installed on the top of the housing, a water outlet installed on the bottom of the housing, a door panel installed on the front of the housing, and a door handle welded on one end of the door panel. After the paint wastewater enters, it passes through the reagent tank to neutralize a large amount of sulfuric acid in the paint, so that the paint can be better filtered. The filtered wastewater enters the odor purification mechanism to absorb a large amount of odor, and the purified water quality is cleaner.

[0005] Although the above technical solution can achieve a good effect of purifying odor, wastewater is generated during the paint production process, and these wastewaters contain ester substances. Ester substances are produced through esterification reaction. Esterification reaction is the process in which alcohol reacts with carboxylic acid or oxygen-containing inorganic acid to generate ester and water. Since ester substances have a lower density than water, they will float on the water surface. These ester substances need to be collected and treated separately because they are harmful to aquatic organisms, soil, human body and ecosystem. Summary of the invention

[0006] The purpose of the present invention is to solve the shortcomings of the prior art and to propose a coating production water treatment device and a treatment method thereof.

[0007] In order to achieve the above object, the present invention adopts the following technical solutions:

[0008] Design a coating production water treatment device, including a box, a support frame and a feed pipe arranged on the upper part of the box:

[0009] An outer cylinder is installed inside the box body, and the bottom of the outer cylinder extends to the outside of the box body, and a sealant is applied at the connection between the outer cylinder and the box body;

[0010] A motor frame is arranged between the two support frames, a driving structure is arranged on one side of the motor frame, and an inner cylinder is connected through the driving structure. The inner cylinder reciprocates up and down inside the outer cylinder, and the sewage floating on the water surface is transferred into the inner cylinder by lowering the position of the inner cylinder;

[0011] The upper part of the inner cylinder is connected with a collecting tank, the upper end of the collecting tank is open, and the height of the upper port of the collecting tank matches the liquid level of the sewage in the box body, and the collecting tank is connected with the interior of the inner cylinder;

[0012] The collecting tank is also provided with a regulating component;

[0013] The regulating assembly includes a floating plate, a slot, a guide rod, a guide hole, a straight plate, a round rod, a cover plate and a material collection port;

[0014] The slot hole is vertically opened on the side wall of the collecting tank, the straight plate is horizontally slidably arranged on the inner side of the slot hole, a material collecting port is opened at the bottom of the collecting tank, a cover plate is hinged on the material collecting port, a floating plate is installed at one end of the straight plate on the outside of the collecting tank, and a round rod is hinged between the other end of the straight plate and the cover plate.

[0015] Preferably, the driving structure includes a rack, an incomplete gear and a stepping motor;

[0016] The rack is symmetrically installed at the lower end of the inner cylinder, the stepper motor is installed on one side of the motor frame, the incomplete gear is installed at the end of the output shaft of the stepper motor, and the incomplete gear is located between the two racks, and the incomplete gear is respectively meshed with the two racks.

[0017] Preferably, the guide rod is vertically installed on the inner side of the slot hole, the guide hole is opened on the straight plate, and the guide rod is located on the inner side of the slot hole.

[0018] Preferably, a push rod is installed at the bottom of the collecting tank, a baffle is installed at the inner upper end of the outer tube, and a reagent leakage assembly is provided between the push rod and the upper part of the outer tube;

[0019] The reagent leakage assembly comprises a circular hole, a conical block, a slot, a straight rod and a return spring;

[0020] The slot is located at the upper end of the outer cylinder, the conical block is clamped on the inner side of the slot, the circular hole is through-opened on the conical block, the straight rod is vertically installed on the baffle, the upper end of the straight rod extends to the inner side of the circular hole, the return spring is sleeved on the outer side of the straight rod, and the return spring is located between the conical block and the baffle, and when the push rod moves downward, the conical block will be pressed down.

[0021] Preferably, a gas exchange hole is opened at an upper end of one side of the box body, a connecting pipe is installed outside the gas exchange hole, and a photocatalytic component is installed inside the connecting pipe;

[0022] The photocatalytic assembly includes a connecting frame, a U-shaped frame, a limiting column, a gear, a mesh cylinder and a tooth groove;

[0023] Tooth grooves are provided at the upper ends of both sides of the U-shaped frame, and the U-shaped frame is slidably arranged on the inner side of the connecting pipe. Gears are fixedly connected to both ends of the net cylinder, and the gears are respectively meshed with the tooth grooves on the same side. A limiting column is installed on one side of the gear, and one end of the limiting column penetrates the connecting pipe and extends to the outside of the connecting pipe.

[0024] The connecting frame is hinged between the U-shaped frame and the partition.

[0025] Preferably, the connecting pipe is made of a transparent material, a partition is hinged on the inner side of the gas exchange hole, and a connecting rod is hinged between the partition and the outer wall of the collection tank.

[0026] Preferably, the lower ends of the outer cylinder and the inner cylinder are both connected with pipeline connection ports.

[0027] Preferably, titanium dioxide particles are contained inside the mesh cylinder, and the titanium dioxide acts as a catalyst.

[0028] The present invention also provides a treatment method for a coating production water treatment device, which specifically comprises the following steps:

[0029] S1. Inject the wastewater generated in the coating production into the box from the feed pipe at the upper end of the box, control the liquid level of the wastewater inside the box, and keep the collection tank extended above the water surface when the initial state is maintained. Turn on the power switch of the stepper motor, and drive the inner cylinder to realize up and down reciprocating motion through the driving structure. During the motion, separate and recover the ester substances floating on the water surface;

[0030] S2. During the movement, the stirring effect generated will cause the ester substances to disperse into tiny droplets of emulsion. For this type of emulsion, a reagent leakage component is set at the upper end of the outer cylinder in coordination with the reciprocating movement of the collection tank. The demulsifier filled in the inner side of the outer cylinder is discharged by taking advantage of the contact between the top rod at the lower end of the collection tank and the reagent leakage component. The emulsion is converted back into a substance floating on the water surface by using the intermittently discharged demulsifier.

[0031] S3. Esters are volatile. For these substances, gas exchange is used to reduce the concentration of volatile gases in the box. Connecting pipes and photocatalytic components are set on the upper part of the box. Intermittent ventilation and shaking of the catalyst inside the photocatalytic component can improve the treatment effect of volatile gases.

[0032] The present invention proposes a coating production water treatment device and a treatment method thereof, which have the beneficial effect that: the coating production water treatment device and the treatment method thereof use a motor to drive the inner cylinder located inside the outer cylinder to achieve up and down reciprocating movement, so that the ester substances generated by the esterification reaction in the wastewater can smoothly enter the inner side of the inner cylinder for centralized collection, and the ester substances in the wastewater are treated separately to achieve environmental protection. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] Figure 1 This is a schematic structural diagram of a coating production water treatment device proposed by the present invention.

[0034] Figure 2 This is a structural schematic diagram of a coating production water treatment device proposed by the present invention from another perspective.

[0035] Figure 3 This is a top view of the structure of a coating production water treatment device proposed by the present invention.

[0036] Figure 4 This is a schematic structural diagram of a photocatalytic component of a paint production water treatment device proposed by the present invention.

[0037] Figure 5 This is a structural schematic diagram of the positions of the inner cylinder and outer cylinder of a paint production water treatment device proposed by the present invention.

[0038] Figure 6 This is a schematic structural diagram of a control component of a paint production water treatment device proposed by the present invention.

[0039] Figure 7 This is a structural schematic diagram of a reagent leakage component of a coating production water treatment device proposed by the present invention.

[0040] Figure 8 for Figure 7 An enlarged structural diagram of part A of a proposed paint production water treatment device.

[0041] In the figure: box body 1, collecting tank 2, connecting rod 3, regulating component 4, floating plate 41, slot hole 42, guide rod 43, guide hole 44, straight plate 45, round rod 46, cover plate 47, material collection port 48, top rod 5, reagent leakage component 6, round hole 61, conical block 62, slot 63, straight rod 64, reset spring 65, inner cylinder 7, outer cylinder 8, sealant 9, support frame 10, gas exchange hole 11, connecting pipe 12, photocatalytic component 13, connecting frame 131, U-shaped frame 132, limiting column 133, gear 134, mesh cylinder 135, tooth groove 136, motor frame 14, rack 15, incomplete gear 16, stepping motor 17, partition 18, baffle 19, pipeline connection port 20. DETAILED DESCRIPTION

[0042] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments.

[0043] Example 1, reference Figure 1-3 A coating production water treatment device comprises a box body 1, a support frame 10 and a feed pipe arranged on the upper part of the box body 1, an outer cylinder 8 is installed on the inner side of the box body 1, and the bottom of the outer cylinder 8 extends to the outside of the box body 1, and a sealant 9 is applied to the connection between the outer cylinder 8 and the box body 1; a collecting tank 2 is connected to the upper part of the inner cylinder 7, the upper end of the collecting tank 2 is open, and the height of the upper port of the collecting tank 2 matches the liquid level of the sewage in the box body 1, the collecting tank 2 is connected to the interior of the inner cylinder 7, and the lower ends of the outer cylinder 8 and the inner cylinder 7 are connected to a pipeline connection port 20.

[0044] A motor frame 14 is arranged between the two support frames 10, and a driving structure is arranged on one side of the motor frame 14, and is connected to the inner cylinder 7 through the driving structure. The inner cylinder 7 reciprocates up and down inside the outer cylinder 8, and the sewage floating on the water surface is transferred into the inner cylinder 7 by utilizing the lowering of the position of the inner cylinder 7. The driving structure includes a rack 15, an incomplete gear 16 and a stepper motor 17. The rack 15 is symmetrically installed at the lower end of the inner cylinder 7, the stepper motor 17 is installed on one side of the motor frame 14, the incomplete gear 16 is installed at the end of the output shaft of the stepper motor 17, and the incomplete gear 16 is located between the two racks 15, and the incomplete gear 16 is respectively meshed with the two racks 15.

[0045] In the process of producing the coating, the waste water generated is injected into the housing 1 from the feed pipe at the upper end of the housing 1. The ester substances in the coating are usually generated through an esterification reaction. The esterification reaction is a process in which alcohol reacts with carboxylic acid or oxygen-containing inorganic acid to generate ester and water. At this time, the stepper motor 17 is turned on. After the power of the stepper motor 17 is turned on, the incomplete gear 16 is driven to rotate clockwise. When the incomplete gear 16 is meshed with the rack 15 on the right, the rack 15 and the inner tube 7 move downward together. When the incomplete gear 16 is meshed with the rack 15 on the left, the rack 15 moves upward together with the inner tube 7. When the inner tube 7 moves downward, the upper end of the inner tube 7 is submerged below the liquid surface. At this time, the original ester substance floats on the water surface because its density is less than that of water. In this way, when the upper end surface of the inner tube 7 is submerged in water, the ester substance enters the inner side of the inner tube 7 for centralized collection. When the inner tube 7 moves upward, the upper end of the inner tube 7 floats to the surface of the water. At this time, under this state, the substance will not enter the inner tube 7.

[0046] The pipe connection ports 20 on the outer tube 8 and the inner tube 7 are both connected with hoses, through which the emulsifier is transported into the outer tube 8, and the ester substances collected by the inner tube 7 are transferred and collected through the hoses.

[0047] Example 2, reference Figure 5-6 The difference between this embodiment and embodiment 1 is that a regulating component 4 is further provided on the collecting tank 2, and the regulating component includes a floating plate 41, a slot hole 42, a guide rod 43, a guide hole 44, a straight plate 45, a round rod 46, a cover plate 47 and a material collecting port 48. The slot hole 42 is vertically opened on the side wall of the collecting tank 2, and the straight plate 45 is horizontally slidably set on the inner side of the slot hole 42. A material collecting port 48 is opened at the bottom of the collecting tank 2, and a cover plate 47 is hinged on the material collecting port 48. A floating plate 41 is installed at one end of the straight plate 45 outside the collecting tank 2, and a round rod 46 is hinged between the other end of the straight plate 45 and the cover plate 47.

[0048] The guide rod 43 is vertically installed inside the slot hole 42 . The guide hole 44 is formed on the straight plate 45 , and the guide rod 43 is located inside the slot hole 42 .

[0049] When collecting ester substances, since the ester substances float on the surface of the liquid, each time the inner cylinder 7 descends, the ester substances entering are limited. If too much water is added to the inner cylinder 7 at a single time, the ester substances and a large amount of water will enter the inner cylinder 7 at the same time, resulting in a decrease in the purity of the collected ester substances.

[0050] To this end, a slot hole 42 is provided on the side wall of the collection tank 2, and a straight plate 45 is slidably arranged inside the slot hole 42. The straight plate 45 is limited by the guide hole 44 and the guide rod 43 so that the straight plate 45 maintains a horizontal state during the movement. When the inner cylinder 7 moves downward, the collection tank 2 enters below the liquid surface. During this process, the floating plate 41 connected to one end of the straight plate 45 is subjected to buoyancy during the contact with the wastewater to float upward. During the floating process of the floating plate 41, the floating plate 41 drives the straight plate 45 and one end of the round rod 46 to lift upward. At this time, the round rod 46 will cover the wastewater. The cover plate 47 on the material collecting port 48 is lifted up, so that the ester substances that originally entered the inner cylinder 7 pass through the material collecting port 48 and enter the inner cylinder 7 to be collected. When the inner cylinder 7 moves upward, the float plate 41 is separated from the liquid surface, the position of the float plate 41 drops, the straight plate 45 and the round rod 46 fall together, and the cover plate 47 covers the material collecting port 48, and the excess water leaks out from the slot 42, thereby improving the collection effect of the ester substances and preventing the problem of the ester substances that have already entered overflowing again when the material collecting port 48 is always open.

[0051] Example 3, reference Figure 7-8 The difference between this embodiment and embodiment 1 and embodiment 2 is that a push rod 5 is installed at the bottom of the collecting tank 2, a baffle 19 is installed at the inner upper end of the outer tube 8, and a reagent leakage component 6 is arranged between the push rod 5 and the upper part of the outer tube 8. The reagent leakage component 6 includes a circular hole 61, a conical block 62, a slot 63, a straight rod 64 and a reset spring 65.

[0052] The slot 63 is located at the upper end of the outer tube 8, the conical block 62 is clamped on the inner side of the slot 63, the circular hole 61 is opened through the conical block 62, the straight rod 64 is vertically installed on the baffle 19, the upper end of the straight rod 64 extends to the inner side of the circular hole 61, the return spring 65 is sleeved on the outer side of the straight rod 64, and the return spring 65 is located between the conical block 62 and the baffle 19. When the push rod 5 moves downward, the conical block 62 will be pressed down.

[0053] During the continuous up-and-down reciprocating movement of the inner cylinder 7, the ester substances are dispersed into fine droplets during the stirring process to form an emulsion, which is difficult to be quickly cleaned in the wastewater.

[0054] To this end, a reagent leakage assembly 6 is arranged at the upper part of the outer cylinder 8, and the interior of the outer cylinder 8 is filled with an emulsifier. When the collecting tank 2 moves downward, the push rod 5 at the lower end of the collecting tank 2 presses downward against the conical block 62 in the card slot 63, so that during the downward movement of the conical block 62, a gap is formed between the card slot 63 and the conical block 62, and the emulsifier inside the outer cylinder 8 enters the box body 1 and contacts with the wastewater. After the wastewater and the emulsifier contact each other, the original emulsion can be condensed and floated on the water surface, which is convenient for collection. When the push rod 5 is lifted upward and separated from the conical block 62, the conical block 6 2 Under the action of the reset spring 65, it is reset, so that the intermittent discharge of the emulsifier is realized. On the one hand, the amount of emulsifier can be controlled to prevent the problem of secondary pollution caused by excessive emulsifier usage. On the other hand, intermittent addition of emulsifier can make the emulsifier more evenly distributed in the material, thereby improving the emulsification efficiency. In the traditional continuous stirring process, the emulsifier may be over-concentrated in some areas and insufficiently distributed in other areas. Intermittent addition of emulsifier can avoid this situation and ensure that the emulsifier is evenly distributed in the entire material, thereby improving the emulsification effect.

[0055] Example 4, reference Figure 4 The difference between this embodiment and Embodiment 1, Embodiment 2 and Embodiment 3 is that a gas exchange hole 11 is opened at the upper end of one side of the box body 1, a connecting pipe 12 is installed outside the gas exchange hole 11, and a photocatalytic component 13 is installed inside the connecting pipe 12. The photocatalytic component 13 includes a connecting frame 131, a U-shaped frame 132, a limiting column 133, a gear 134, a mesh tube 135 and a tooth groove 136.

[0056] Tooth grooves 136 are provided at the upper ends of both sides of the U-shaped frame 132, and the U-shaped frame 132 is slidably arranged on the inner side of the connecting pipe 12. Gears 134 are fixedly connected to both ends of the net tube 135, and the gears 134 are respectively meshed with the tooth grooves 136 on the same side. A limiting column 133 is installed on one side of the gear 134, and one end of the limiting column 133 passes through the connecting pipe 12 and extends to the outside of the connecting pipe 12. The connecting frame 131 is hinged between the U-shaped frame 132 and the partition 18. The connecting pipe 12 is set with a transparent material. The inner side of the gas exchange hole 11 is hinged with a partition 18, and a connecting rod 3 is hinged between the partition 18 and the outer wall of the collection tank 2.

[0057] Ester substances are volatile. When ester substances are collected in a closed environment, the concentration of gas is relatively high. When the box 1 is opened, the overflowing gas will have an impact on the human body and the environment.

[0058] To this end, a connecting tube 12 is provided on one side of the box body 1, and a mesh tube 135 matching its size is placed inside the connecting tube 12. Titanium dioxide particles are contained in the mesh tube 135. At the same time, the connecting tube 12 is made of a transparent material. Titanium dioxide can generate electron-hole pairs under the irradiation of ultraviolet light. These electron-hole pairs can react with oxygen molecules and water molecules adsorbed on the surface of titanium dioxide to generate hydroxyl radicals and superoxide anion radicals with strong oxidizing properties. These free radicals can oxidatively decompose organic pollutants, including ester substances.

[0059] Secondly, when the collecting tank 2 is rising, the partition 18 covering the gas exchange hole 11 will be lifted toward the connecting pipe 12 through the connecting rod 3, and the gas in the box body 1 will be transferred to the inner side of the connecting pipe 12. When the collecting tank 2 is descending, the partition 18 will close the gas exchange hole 11 again to control the overflow of a single gas, so as to ensure the catalytic effect. At the same time, when the partition 18 is opened, the U-shaped frame 132 will be pushed toward the side away from the box body 1 through the connecting frame 131. At this time, the tooth groove 136 at the upper end of the U-shaped frame 132 is in contact with the mesh. The gears 134 on both sides of the cylinder 135 cooperate with each other to drive the mesh cylinder 135 to rotate. During the rotation of the mesh cylinder 135, the titanium dioxide particles on the inner side of the mesh cylinder 135 can be effectively driven to change their position and shape, and contact the volatile gas with different contact surfaces to improve the catalytic effect. When the partition 18 is closed, the connecting frame 131 will pull back the U-shaped frame 132, which will drive the mesh cylinder 135 to rotate again. During the rotation, the mesh cylinder 135 can only rotate in place due to the setting of the limiting column 133, but cannot translate.

[0060] Embodiment 5, the present invention also provides a treatment method for a coating production water treatment device, which specifically comprises the following steps:

[0061] S1. Inject the wastewater generated in the coating production into the box 1 from the feed pipe at the upper end of the box 1, control the liquid level of the wastewater inside the box 1, and keep the collection tank 2 extended above the water surface when the initial state is maintained. Turn on the power switch of the stepper motor 17, and drive the inner cylinder 7 to realize up and down reciprocating motion through the driving structure. During the motion, separate and recover the ester substances floating on the water surface;

[0062] S2. During the movement, the stirring effect generated will cause the ester substances to disperse into small droplets of emulsion. For this type of emulsion, in conjunction with the reciprocating movement of the collecting tank 2, a reagent leakage component 6 is set at the upper end of the outer cylinder 8. By utilizing the opportunity of the push rod 5 at the lower end of the collecting tank 2 contacting the reagent leakage component 6, the demulsifier filled in the inner side of the outer cylinder 8 is discharged, and the emulsion is converted back into a substance floating on the water surface by using the intermittently discharged demulsifier;

[0063] S3. Ester substances are volatile. Gas exchange is used for such substances to reduce the concentration of volatile gases in the housing 1. A connecting pipe 12 and a photocatalytic component 13 are provided on the upper part of the housing 1. Intermittent ventilation and shaking of the catalyst inside the photocatalytic component 13 can improve the treatment effect of volatile gases.

[0064] The working principle of the device is:

[0065] In the process of coating production, the waste water generated is injected into the box body 1 from the feed pipe at the upper end of the box body 1. The ester substances in the coating are usually produced by esterification reaction. The esterification reaction is the process of alcohol reacting with carboxylic acid or oxygen-containing inorganic acid to generate ester and water. At this time, the stepper motor 17 is turned on. After the power of the stepper motor 17 is turned on, the incomplete gear 16 is driven to rotate clockwise. When the incomplete gear 16 is meshed with the rack 15 on the right side, the rack 15 and the inner cylinder 7 move downward together. When the incomplete gear 16 is meshed with each other, the rack 15 and the inner cylinder 7 move downward together. When the wheel 16 is meshed with the rack 15 on the left side, the rack 15 moves upward together with the inner tube 7. When the inner tube 7 moves downward, the upper end of the inner tube 7 is submerged below the liquid surface. At this time, the original ester substance floats on the water surface because its density is less than that of water. In this way, when the upper end surface of the inner tube 7 is submerged in water, the ester substance enters the inner side of the inner tube 7 and is collected. When the inner tube 7 moves upward, the upper end of the inner tube 7 floats to the surface of the water. At this time, in this state, the substance will not enter the inner tube 7.

[0066] When collecting ester substances, since the ester substances float on the surface of the liquid, each time the inner cylinder 7 descends, the ester substances entering are limited. If too much water is added to the inner cylinder 7 at a single time, the ester substances and a large amount of water will enter the inner cylinder 7 at the same time, resulting in a decrease in the purity of the collected ester substances.

[0067] To this end, a slot hole 42 is provided on the side wall of the collection tank 2, and a straight plate 45 is slidably arranged inside the slot hole 42. The straight plate 45 is limited by the guide hole 44 and the guide rod 43 so that the straight plate 45 maintains a horizontal state during the movement. When the inner cylinder 7 moves downward, the collection tank 2 enters below the liquid surface. During this process, the floating plate 41 connected to one end of the straight plate 45 is subjected to buoyancy during the contact with the wastewater to float upward. During the floating process of the floating plate 41, the floating plate 41 drives the straight plate 45 and one end of the round rod 46 to lift upward. At this time, the round rod 46 will cover the wastewater. The cover plate 47 on the material collecting port 48 is lifted up, so that the ester substances that originally entered the inner cylinder 7 pass through the material collecting port 48 and enter the inner cylinder 7 to be collected. When the inner cylinder 7 moves upward, the float plate 41 is separated from the liquid surface, the position of the float plate 41 drops, the straight plate 45 and the round rod 46 fall together, and the cover plate 47 covers the material collecting port 48, and the excess water leaks out from the slot 42, thereby improving the collection effect of the ester substances and preventing the problem of the ester substances that have already entered overflowing again when the material collecting port 48 is always open.

[0068] During the continuous up-and-down reciprocating movement of the inner cylinder 7, the ester substances are dispersed into fine droplets during the stirring process to form an emulsion, which is difficult to be quickly cleaned in the wastewater.

[0069] To this end, a reagent leakage assembly 6 is arranged at the upper part of the outer cylinder 8, and the interior of the outer cylinder 8 is filled with an emulsifier. When the collecting tank 2 moves downward, the push rod 5 at the lower end of the collecting tank 2 presses downward against the conical block 62 in the card slot 63, so that during the downward movement of the conical block 62, a gap is formed between the card slot 63 and the conical block 62, and the emulsifier inside the outer cylinder 8 enters the box body 1 and contacts with the wastewater. After the wastewater and the emulsifier contact each other, the original emulsion can be condensed and floated on the water surface, which is convenient for collection. When the push rod 5 is lifted upward and separated from the conical block 62, the conical block 6 2 Under the action of the reset spring 65, it is reset, so that the intermittent discharge of the emulsifier is realized. On the one hand, the amount of emulsifier can be controlled to prevent the problem of secondary pollution caused by excessive emulsifier usage. On the other hand, intermittent addition of emulsifier can make the emulsifier more evenly distributed in the material, thereby improving the emulsification efficiency. In the traditional continuous stirring process, the emulsifier may be over-concentrated in some areas and insufficiently distributed in other areas. Intermittent addition of emulsifier can avoid this situation and ensure that the emulsifier is evenly distributed in the entire material, thereby improving the emulsification effect.

[0070] Ester substances are volatile. When ester substances are collected in a closed environment, the concentration of gas is relatively high. When the box 1 is opened, the overflowing gas will have an impact on the human body and the environment.

[0071] To this end, a connecting tube 12 is provided on one side of the box body 1, and a mesh tube 135 matching its size is placed inside the connecting tube 12. Titanium dioxide particles are contained in the mesh tube 135. At the same time, the connecting tube 12 is made of a transparent material. Titanium dioxide can generate electron-hole pairs under the irradiation of ultraviolet light. These electron-hole pairs can react with oxygen molecules and water molecules adsorbed on the surface of titanium dioxide to generate hydroxyl radicals and superoxide anion radicals with strong oxidizing properties. These free radicals can oxidatively decompose organic pollutants, including ester substances.

[0072] Secondly, when the collecting tank 2 is rising, the partition 18 covering the gas exchange hole 11 will be lifted toward the connecting pipe 12 through the connecting rod 3, and the gas in the box body 1 will be transferred to the inner side of the connecting pipe 12. When the collecting tank 2 is descending, the partition 18 will close the gas exchange hole 11 again to control the overflow of a single gas, so as to ensure the catalytic effect. At the same time, when the partition 18 is opened, the U-shaped frame 132 will be pushed toward the side away from the box body 1 through the connecting frame 131. At this time, the tooth groove 136 at the upper end of the U-shaped frame 132 is in contact with the mesh. The gears 134 on both sides of the cylinder 135 cooperate with each other to drive the mesh cylinder 135 to rotate. During the rotation of the mesh cylinder 135, the titanium dioxide particles on the inner side of the mesh cylinder 135 can be effectively driven to change their position and shape, and contact the volatile gas with different contact surfaces to improve the catalytic effect. When the partition 18 is closed, the connecting frame 131 will pull back the U-shaped frame 132, which will drive the mesh cylinder 135 to rotate again. During the rotation, the mesh cylinder 135 can only rotate in place due to the setting of the limiting column 133, but cannot translate.

[0073] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes according to the technical scheme and inventive concept of the present invention within the technical scope disclosed by the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A coating production water treatment device, comprising a housing (1), a support frame (10) and a feed pipe arranged on the upper part of the housing (1), characterized in that: An outer cylinder (8) is installed inside the box body (1), and the bottom of the outer cylinder (8) extends to the outside of the box body (1), and a sealant (9) is applied at the connection between the outer cylinder (8) and the box body (1); A motor frame (14) is provided between the two support frames (10); a driving structure is provided on one side of the motor frame (14), and an inner cylinder (7) is connected via the driving structure; the inner cylinder (7) reciprocates up and down inside the outer cylinder (8); and the ester substances floating in the sewage are transferred into the inner cylinder (7) by virtue of the lowering of the position of the inner cylinder (7); The upper part of the inner cylinder (7) is connected to a collecting tank (2), the upper end of the collecting tank (2) is open, and the height of the upper port of the collecting tank (2) matches the liquid level of the sewage in the box (1), and the collecting tank (2) and the inner cylinder (7) are connected to each other; A push rod (5) is installed at the bottom of the collection tank (2), a baffle (19) is installed at the inner upper end of the outer tube (8), and a reagent leakage assembly (6) is provided between the push rod (5) and the upper part of the outer tube (8); The collection tank (2) is also provided with a regulating component (4); The regulating assembly comprises a floating plate (41), a slot hole (42), a guide rod (43), a guide hole (44), a straight plate (45), a round rod (46), a cover plate (47), and a material collection port (48); The slot (42) is vertically formed on the side wall of the collection tank (2); the straight plate (45) is horizontally slidably arranged on the inner side of the slot (42); a material collection port (48) is formed at the bottom of the collection tank (2); a cover plate (47) is hingedly connected to the material collection port (48); a floating plate (41) is installed at one end of the straight plate (45) outside the collection tank (2); and a round rod (46) is hingedly connected between the other end of the straight plate (45) and the cover plate (47); The guide rod (43) is vertically mounted on the inner side of the slot hole (42); the guide hole (44) is formed on the straight plate (45), and the guide rod (43) is located on the inner side of the slot hole (42); The reagent leakage component (6) comprises a circular hole (61), a conical block (62), a slot (63), a straight rod (64) and a return spring (65); The slot (63) is located at the upper end of the outer cylinder (8); the conical block (62) is clamped on the inner side of the slot (63); the circular hole (61) is through-opened on the conical block (62); the straight rod (64) is vertically mounted on the baffle (19); the upper end of the straight rod (64) extends to the inner side of the circular hole (61); the return spring (65) is sleeved on the outer side of the straight rod (64); and the return spring (65) is located between the conical block (62) and the baffle (19); when the push rod (5) moves downward, the conical block (62) is pressed down.

2. The coating production water treatment device according to claim 1, characterized in that: The driving structure comprises a rack (15), an incomplete gear (16) and a stepping motor (17); The rack (15) is symmetrically mounted on the lower end of the inner cylinder (7), the stepping motor (17) is mounted on one side of the motor frame (14), the incomplete gear (16) is mounted on the end of the output shaft of the stepping motor (17), and the incomplete gear (16) is located between the two racks (15), and the incomplete gear (16) is respectively meshed with the two racks (15).

3. The coating production water treatment device according to claim 2, characterized in that: A gas exchange hole (11) is provided at an upper end of one side of the box body (1), a connecting pipe (12) is installed outside the gas exchange hole (11), and a photocatalytic component (13) is installed inside the connecting pipe (12); The photocatalytic component (13) comprises a connecting frame (131), a U-shaped frame (132), a limiting column (133), a gear (134), a mesh cylinder (135) and a tooth groove (136); Tooth grooves (136) are provided at the upper ends of both sides of the U-shaped frame (132), and the U-shaped frame (132) is slidably arranged on the inner side of the connecting pipe (12). Gears (134) are fixedly connected to both ends of the net cylinder (135), and the gears (134) are respectively meshed with the tooth grooves (136) on the same side. A limiting column (133) is installed on one side of the gear (134), and one end of the limiting column (133) passes through the connecting pipe (12) and extends to the outside of the connecting pipe (12); The connecting frame (131) is hinged between the U-shaped frame (132) and the partition (18).

4. The coating production water treatment device according to claim 3, characterized in that: The connecting pipe (12) is made of a transparent material, a partition (18) is hingedly connected to the inner side of the gas exchange hole (11), and a connecting rod (3) is hingedly connected between the partition (18) and the outer wall of the collection tank (2).

5. The coating production water treatment device according to claim 4, characterized in that: The lower ends of the outer cylinder (8) and the inner cylinder (7) are both connected to a pipeline connection port (20).

6. The coating production water treatment device according to claim 5, characterized in that: Titanium dioxide particles are contained inside the mesh cylinder (135), and the titanium dioxide acts as a catalyst.

7. A treatment method using the coating production water treatment device according to claim 6, characterized in that: The specific steps include: S1. Injecting wastewater generated in the production of coatings into the box (1) from the feed pipe at the upper end of the box (1), controlling the liquid level of the wastewater inside the box (1), and maintaining the initial state so that the collection tank (2) extends above the water surface, turning on the power switch of the stepper motor (17), and driving the inner cylinder (7) to achieve up and down reciprocating motion through the driving structure, and during the motion, separating and recovering the ester substances floating on the water surface; S2. During the movement, the stirring effect generated will cause the ester substances to disperse into fine droplets of emulsion. For this type of emulsion, in conjunction with the reciprocating movement of the collection tank (2), a reagent leakage component (6) is provided at the upper end of the outer cylinder (8). By utilizing the opportunity of the top rod (5) at the lower end of the collection tank (2) contacting the reagent leakage component (6), the demulsifier filled in the inner side of the outer cylinder (8) is discharged, and the emulsion is converted back into a substance floating on the water surface by utilizing the intermittently discharged demulsifier; S3. Esters are volatile. For such substances, gas exchange is used to reduce the concentration of volatile gases in the housing (1). A connecting pipe (12) and a photocatalytic component (13) are provided at the upper portion of the housing (1). Intermittent ventilation and shaking of the catalyst inside the photocatalytic component (13) improve the treatment effect of the volatile gases.

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