Waste liquid treatment device for chemical analysis

Abstract

The invention discloses a waste liquid treatment device for chemical analysis. The waste liquid treatment device comprises a bracket, a treatment tank, a pretreatment mechanism, a stirring mechanism and a driving motor, the device has the advantages that the pretreatment mechanism, the treatment tank and the stirring mechanism are arranged, a first hollow lifting screw and a second hollow lifting screw can be driven to rotate upwards through the driving motor, meanwhile, a hollow pressing screw is driven to rotate downwards, the pretreatment mechanism can pretreat solid impurities in waste liquid, manual shutdown treatment is not needed, and the treatment efficiency is improved. The working efficiency of the device is improved, and the treatment load of the treatment tank is reduced; a hollow down-pressing spiral rotates downwards to stir waste liquid and a precipitant in the treatment tank, so that the generation of solid impurities such as precipitates and flocculates is accelerated, and meanwhile, impurities adhered to the inner wall of the treatment tank can be scraped off through a spiral scraping plate and a fixed scraping plate; and precipitate floccules generated in the treatment tank are lifted upwards and discharged through the second hollowed-out lifting screw, so that automatic discharge of the precipitates is realized.

Description

Technical Field

[0001] The present invention relates to the technical field of chemical analysis waste liquid treatment, in particular to a chemical analysis waste liquid treatment device. Background Art

[0002] In coal chemical laboratories, various liquid wastes with complex components are discharged almost every day. The indiscriminate discharge of highly hazardous waste liquids containing toxic metals harms the environment and affects human health. At present, there is a lack of laboratory-specific chemical waste liquid treatment equipment. When treating heavy metal waste liquid, the staff first needs to measure the waste liquid, then adjust the pH value of the waste liquid to an appropriate level, and then measure the reducing agent. After stirring, a precipitate is generated, and the waste liquid becomes a suspension. The toxic metals in the lower layer can be treated by filtration after static sedimentation, and the filtered clear liquid can meet the emission standards. In the above-mentioned treatment process, the chemical waste liquid is stored in open equipment, and waste gas is easily generated during the treatment process, which is harmful to human health. In addition, manual labor is required to participate in operations such as stirring, which is labor-intensive. After flocculation, it needs to be treated by static sedimentation and then filtered. The whole process is time-consuming and inefficient. Summary of the Invention

[0003] The object of the present invention is to provide a chemical analysis waste liquid treatment device to solve the problems existing in the prior art.

[0004] The present invention is implemented by the following technical scheme: a waste liquid treatment device for chemical analysis, which includes a bracket, a treatment tank, a pretreatment mechanism, a stirring mechanism and a driving motor, the treatment tank is fixed on the top of the bracket, and a feeding pipe is connected to the upper side wall of the treatment tank; a pretreatment mechanism is provided on one side of the treatment tank, the discharge pipe of the pretreatment mechanism is connected to the upper part of the treatment tank, the stirring mechanism is installed inside the treatment tank, and the driving motor for driving the stirring mechanism to rotate is installed on the top of the cover plate of the treatment tank; the output shaft of the driving motor is also transmission-connected to the rotating shaft of the first hollow lifting screw of the pretreatment mechanism.

[0005] Furthermore, the processing tank includes the cover plate, the intermediate cylinder and the conical tank bottom which are sequentially arranged from top to bottom, and a control valve is installed on the bottom outlet of the conical tank bottom.

[0006] Furthermore, a water distribution tray is provided at the bottom of the cover plate, a water inlet connected to the water distribution tray is provided on the cover plate, and a plurality of water outlets are connected at the bottom end of the water distribution tray; an exhaust port and a dosing port that pass through the cover plate and the water distribution tray are connected at the top of the cover plate.

[0007] Furthermore, the pretreatment mechanism includes a pretreatment cylinder closed at the top and bottom, and the first hollow lifting spiral rotatably arranged in the pretreatment cylinder; the first sedimentation discharge pipe, the liquid inlet pipe and the liquid discharge pipe are arranged in sequence from top to bottom on the side wall of the pretreatment cylinder.

[0008] Furthermore, a baffle that can be flipped up and down is hinged inside one end of the drain pipe that is connected to the processing tank.

[0009] Furthermore, the stirring mechanism includes a central tube, a second hollow lifting spiral, a hollow downward pressure spiral and a second sedimentation discharge pipe, the central tube includes a rotating seat, a lower tube body, a rotating tube and an upper tube body arranged in sequence from bottom to top, the rotating seat is rotatably arranged inside the bottom outlet of the processing tank, the bottom end of the lower tube body is fixedly connected to the top end of the rotating seat, the rotating tube is fixed to the top end of the lower tube body, the top end of the rotating tube is rotatably connected to the bottom end of the upper tube body, and the top end of the upper tube body is fixedly connected to the cover plate; at the bottom tube body A feed port is provided on one side; a second sedimentation discharge pipe is connected between the upper side wall of the upper tube body and the outer wall of the processing tank, and a second hollow lifting screw is provided inside the central tube, and the top end of the rotating shaft of the second hollow lifting screw passes through the cover plate and is transmission-connected to the output shaft of the driving motor; the inner wall of the rotating tube is fixed to the outer edge of the second hollow lifting screw, and the hollow pressing screw is fixed on the outer walls of the rotating tube and the lower tube body, and the bottom end of the hollow pressing screw passes through the feed port and is fixedly connected to the inner wall of the rotating seat.

[0010] Furthermore, a filter plate is fixed inside the bottom end of the rotating seat, and the bottom end of the rotating shaft of the second hollow lifting spiral is fixedly connected to the middle part of the filter plate.

[0011] Furthermore, a spiral scraper matching the inner wall of the processing tank is fixed to the outer edge of the hollow pressing spiral.

[0012] Furthermore, a fixed scraper is fixed on the outer wall of the rotating seat and is in sliding contact with the conical tank bottom of the processing tank.

[0013] Furthermore, a heating device is provided on the side wall of the processing tank.

[0014] Advantages of the present invention: The present invention is provided with a pretreatment mechanism, a treatment tank and a stirring mechanism. The driving motor can drive the first hollow lifting screw and the second hollow lifting screw to rotate upward, and at the same time drive the hollow pressing screw to rotate downward. The pretreatment mechanism can pretreat the solid impurities in the waste liquid without manual shutdown, thereby improving the working efficiency of the device and reducing the processing load of the treatment tank. The downward rotation of the hollow pressing screw can realize the stirring of the waste liquid and the precipitant in the treatment tank, thereby accelerating the generation of solid impurities such as precipitation and flocculants. At the same time, the impurities sticking to the inner wall of the treatment tank can be scraped off by the spiral scraper and the fixed scraper. The precipitated flocs generated in the treatment tank are lifted upward and discharged by the second hollow lifting screw, thereby realizing the automatic discharge of sediment. In addition, during the treatment process, a reversible baffle is set on the pipe connecting the pretreatment mechanism and the treatment tank. During the drainage process, the baffle is flipped upward and opened under the action of water flow to ensure smooth drainage. After the drainage is completed, the baffle returns to a vertical state under the action of gravity, and then closes the drainage pipe to prevent harmful gases generated by the waste liquid during the subsequent treatment process in the treatment tank from overflowing from the pretreatment mechanism, thereby avoiding pollution to the environment. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 Schematic diagram of the overall structure of this embodiment.

[0016] Figure 2 It is a structural diagram of the pretreatment mechanism.

[0017] Figure 3 Schematic diagram of the local structure of the drainage pipe.

[0018] Figure 4 Schematic diagram of the structure of the stirring mechanism.

[0019] Figure 5 Schematic diagram of the internal structure of the rotating seat.

[0020] Figure 6 Schematic diagram of the cover structure.

[0021] In the picture: Bracket 1, treatment tank 2, cover plate 21, water inlet 211, exhaust port 212, dosing port 213, intermediate cylinder 22, conical tank bottom 23, feeding pipe 24, control valve 25, heating device 26, pretreatment mechanism 3, drain pipe 31, first hollow lifting spiral 32, pretreatment cylinder 33, first sedimentation discharge pipe 34, liquid inlet pipe 35, baffle 36, stirring mechanism 4, central cylinder 41, second hollow lifting spiral 42, hollow downward pressure spiral 43, second sedimentation discharge pipe 44, rotating seat 411, lower tube body 412, rotating tube 413, upper tube body 414, feed port 415, filter plate 416, spiral scraper 45, fixed scraper 46, drive motor 5, water distribution tray 6, water outlet 61. DETAILED DESCRIPTION

[0022] The following will provide a clear and complete description of the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. All other embodiments obtained by ordinary technicians in this field based on the embodiments of the present invention without making any creative efforts shall fall within the scope of protection of the present invention.

[0023] like Figures 1 to 6 As shown, a waste liquid treatment device for chemical analysis includes a bracket 1, a treatment tank 2, a pretreatment mechanism 3, a stirring mechanism 4, and a drive motor 5. The treatment tank 2 is fixed on the top of the bracket 1. The treatment tank 2 includes a cover plate 21, an intermediate cylinder 22, and a conical tank bottom 23 arranged in order from top to bottom. A control valve 25 is installed at the bottom outlet of the conical tank bottom 23. A feeding pipe 24 is connected to the upper side wall of the treatment tank 2. Flocculant can be added to the treatment tank 2 through the feeding pipe 24 to promote flocculation and sedimentation of the waste liquid therein. A heating device 26 is installed on the side wall of the treatment tank 2. In this embodiment, the heating device 26 is an electric heating coil installed in the interlayer of the treatment tank 2. The heating device 26 can heat the liquid in the treatment tank 2 to keep it within the optimal temperature range, thereby improving the wastewater treatment effect.

[0024] A pretreatment mechanism 3 is provided on one side of the treatment tank 2, and a drainage pipe 31 of the pretreatment mechanism 3 is connected to the upper portion of the treatment tank 2. By providing the pretreatment mechanism 3, chemical waste liquid can be pretreated and sediment in the waste liquid can be removed to avoid affecting subsequent operations. The pretreatment mechanism 3 includes a pretreatment cylinder 33 that is sealed at the top and bottom, and a first hollow lifting screw 32 that is rotatably disposed within the pretreatment cylinder 33. The top and bottom ends of the rotating shaft of the first hollow lifting screw 32 are rotatably connected to the top and bottom ends of the pretreatment cylinder 33, respectively. A first sedimentation discharge pipe 34, a liquid inlet pipe 35, and a drainage pipe 31 are provided on the sidewall of the pretreatment cylinder 33 in order from top to bottom. A baffle 36 that can be flipped up and down is hingedly connected to the inner portion of the drainage pipe 31 at one end that is connected to the pretreatment tank 2. The chemical waste liquid enters the interior of the pretreatment cylinder 33 through the liquid inlet pipe 35 in the middle and then flows downward. The solid impurities in the waste liquid are lifted upward by the first hollow lifting screw 32 to the first sedimentation discharge pipe 34 for discharge, and the waste liquid enters the treatment tank 2 through the drainage pipe 31. During this process, the baffle 36 flips upward and opens under the action of the water flow to ensure smooth drainage; after the drainage is completed, the baffle 36 returns to a vertical state under the action of gravity, and then closes the drainage pipe 31 to prevent the harmful gases generated by the waste liquid during the subsequent treatment process in the treatment tank 2 from overflowing from the pretreatment mechanism 3, thereby avoiding pollution to the environment.

[0025] A stirring mechanism 4 is installed within the treatment tank 2. The treatment tank 2 and stirring mechanism 4 work together to render the pre-treated waste liquid harmless, ensuring that it meets discharge requirements before being discharged. A water distribution tray 6 is located at the bottom of the cover plate 21. A water inlet 211 is provided on the cover plate 21, communicating with the water distribution tray 6. Several water outlets 61 are connected to the bottom of the water distribution tray 6. An exhaust port 212 and a dosing port 213, which extend through the cover plate 21 and the water distribution tray 6, are located at the top of the cover plate 21. The water inlet 211 is used to connect to an external water source. Through the water inlet 211 and the water distribution tray 6, the concentration of the waste liquid in the treatment tank 2 can be adjusted in the early stage, and the interior of the treatment tank 2 can be cleaned after the harmless waste liquid is discharged in the later stage to prevent it from affecting the next use; the dosing port 213 in this example is connected to a double-headed pipe 734, which is used to add an oxidant or a reducing agent to the waste liquid in the treatment tank 2, oxidize or reduce the harmful substances in the waste liquid into harmless substances, reduce the toxicity of the waste liquid, and ensure that the pH value reaches a predetermined value; the exhaust port 212 can be connected to the gas treatment device, or activated carbon, etc. can be directly added to the exhaust port 212, so as to collect and treat the toxic and harmful gases generated during the treatment process. A drive motor 5 for driving the stirring mechanism 4 to rotate is installed on the top of the cover plate 21 of the treatment tank 2; the output shaft of the drive motor 5 is also connected to the rotating shaft of the first hollow lifting screw 32 of the pretreatment mechanism 3; in this embodiment, the drive motor 5 is vertically fixed on the top of the cover plate 21, and its output shaft rotates through the center of the cover plate 21 and the water distribution tray 6 and is coaxially fixed with the top end of the rotating shaft of the second hollow lifting screw 42 to realize transmission; and the output shaft of the drive motor 5 and the rotating shaft of the first hollow lifting screw 32 realize power transmission through a pulley group; when the drive motor 5 is started, the first and second hollow lifting screws can be driven to rotate at the same time.

[0026] The stirring mechanism 4 includes a central tube 41, a second hollow lifting spiral 42, a hollow pressing spiral 43 and a second sedimentation discharge pipe 44. The central tube 41 includes a rotating seat 411, a lower tube body 412, a rotating tube 413 and an upper tube body 414 arranged in sequence from bottom to top. The rotating seat 411 is rotatably arranged inside the bottom outlet of the processing tank 2. The bottom end of the lower tube body 412 is fixedly connected to the top of the rotating seat 411. The rotating tube 413 is fixed on the top of the lower tube body 412. The top of the rotating tube 413 is rotatably connected to the bottom end of the upper tube body 414. The top of the upper tube body 414 is fixedly connected to the cover plate 21. A feed port 415 is provided on one side of the lower tube body 412. A second sedimentation discharge pipe 44 is connected between the upper side wall of the upper tube body 414 and the outer wall of the processing tank 2. A second hollow lifting screw 42 is provided inside the central tube 41. The top end of the rotating shaft of the second hollow lifting screw 42 passes through the cover plate 21 and is transmission-connected to the output shaft of the drive motor 5. The inner wall of the rotating tube 413 is fixed to the outer edge of the second hollow lifting screw 42. A hollow pressing screw 43 is fixed to the outer wall of the rotating tube 413 and the lower tube body 412. The bottom end of the hollow pressing screw 43 passes through the feed port 415 and is fixedly connected to the inner wall of the rotating seat 411. A filter plate 416 is fixed inside the bottom end of the rotating seat 411. The bottom end of the rotating shaft of the second hollow lifting screw 42 is fixedly connected to the middle of the filter plate 416. The hollow pressing screw 43 is indirectly fixed to the second hollow lifting screw 42 through the rotating tube 413 and the rotating seat 411. When the second hollow screw 42 rotates under the drive of the driving motor 5, it will drive the hollow pressing screw 43 to rotate synchronously. Since the rotation directions of the hollow pressing screw 43 and the second hollow lifting screw 42 are opposite, the two can achieve the effect of one pressing downward and the other lifting upward.

[0027] A spiral scraper 45 is fixed to the outer edge of the hollowed-down screw 43, matching the inner wall of the treatment tank 2. A fixed scraper 46 is fixed to the outer wall of the rotating base 411, slidingly contacting the conical bottom 23 of the treatment tank 2. When the second hollowed-down screw 42 drives the hollowed-down screw 43 and the rotating base 411 to rotate, it also drives the spiral scraper 45 and the fixed scraper 46 to rotate, scraping away material adhering to the inner wall of the treatment tank 2, achieving a cleaning effect and ensuring the treatment effect.

[0028] Working process: S1. Start the drive motor 5, so that the drive motor 5 drives the second hollow lifting screw 42 in the stirring mechanism 4 to rotate, and at the same time drives the first hollow lifting screw 32 of the pretreatment mechanism 3 through the pulley group; the chemical waste liquid enters the pretreatment cylinder 33 through the liquid inlet pipe 35 in the middle, and the fixed impurities in the chemical waste liquid are lifted upward by the first hollow lifting screw 32, and finally discharged from the first sedimentation and distribution roller 34. The liquid then flows downward through the hollow holes in the first hollow lifting screw 32 and into the interior of the treatment tank 2 through the discharge pipe 31; S2. Next, water is added to the water distribution tray 6 through the water inlet 211, and then evenly added to the treatment tank 2 through the water outlet 61, thereby adjusting the concentration of the waste liquid; then, an oxidizing agent or a reducing agent is added to the treatment tank 2 through the dosing port 213 to oxidize or reduce the harmful substances in the waste liquid into harmless substances, thereby reducing the toxicity of the waste liquid and ensuring that the pH value reaches a predetermined value; the gas generated during the treatment process is discharged through the exhaust port 212; S3. A precipitant is added to the waste liquid through the feeding pipe 24 to cause the harmful substances in the waste liquid to flocculate and precipitate. The flocculated precipitate is stirred by the hollow downward pressure screw 43 and moves to the lower part of the treatment tank 2. Then, it enters the central cylinder 41 through the feeding port 415. The flocculent is then lifted upward by the second hollow lifting screw 42 until it is discharged from the treatment tank through the second sedimentation discharge pipe 44. S4, the chemical waste liquid after harmless treatment passes through the through hole on the second hollow lifting screw 42 and the filter plate 416 and then is discharged from the treatment tank 2 through the bottom outlet of the conical tank bottom 23; after the treated liquid is emptied, water is added to the treatment tank 2 through the water inlet 211 and the water distribution tray 6 to clean the inside of the treatment tank 2 to prevent the residual waste liquid from affecting the next use of the device; During the above process, the spiral scraper 45 and the fixed scraper 46 can be used to clean the inner wall of the treatment tank 2 to prevent flocculants from adhering to the inner wall of the treatment tank 2 and ensure that the inner wall of the tank is clean.

[0029] In the description of the present invention, it should be noted that the terms "center", "up", "down", "front", "back", "top", "bottom", "left", "right", "vertical", "horizontal", "inside", "outside", etc., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention.

Claims

1. A chemical analysis waste liquid treatment device, characterized in that: It includes a bracket, a processing tank, a pretreatment mechanism, a stirring mechanism and a driving motor. The processing tank is fixed on the top of the bracket, and a feeding pipe is connected to the upper side wall of the processing tank; the pretreatment mechanism is arranged on one side of the processing tank, and the discharge pipe of the pretreatment mechanism is connected to the upper part of the processing tank. The stirring mechanism is installed inside the processing tank, and the driving motor for driving the stirring mechanism to rotate is installed on the top of the cover plate of the processing tank; the output shaft of the driving motor is also connected to the rotating shaft of the first hollow lifting screw of the pretreatment mechanism.

2. A chemical analysis waste liquid treatment device according to claim 1, characterized in that: The processing tank comprises the cover plate, the intermediate cylinder and the conical tank bottom which are sequentially arranged from top to bottom, and a control valve is installed on the bottom outlet of the conical tank bottom.

3. The chemical analysis waste liquid treatment device according to claim 1, characterized in that: A water distribution tray is provided at the bottom of the cover plate, a water inlet connected to the water distribution tray is provided on the cover plate, and a plurality of water outlets are connected at the bottom end of the water distribution tray; an exhaust port and a dosing port that pass through the cover plate and the water distribution tray are connected at the top of the cover plate.

4. The chemical analysis waste liquid treatment device according to claim 1, characterized in that: The pretreatment mechanism includes a pretreatment cylinder that is closed at the top and bottom, and the first hollow lifting screw that is rotatably arranged in the pretreatment cylinder; A first sedimentation discharge pipe, a liquid inlet pipe and the liquid discharge pipe are sequentially arranged on the side wall of the pretreatment cylinder from top to bottom.

5. The chemical analysis waste liquid treatment device according to claim 4, characterized in that: A baffle that can be turned upside down is hinged inside one end of the liquid discharge pipe that is connected to the processing tank.

6. The chemical analysis waste liquid treatment device according to claim 4, characterized in that: The stirring mechanism includes a central tube, a second hollow lifting spiral, a hollow downward pressure spiral and a second sedimentation discharge pipe, the central tube includes a rotating seat, a lower tube body, a rotating tube and an upper tube body arranged in sequence from bottom to top, the rotating seat is rotatably arranged inside the bottom outlet of the processing tank, the bottom end of the lower tube body is fixedly connected to the top end of the rotating seat, the rotating tube is fixed on the top end of the lower tube body, the top end of the rotating tube is rotatably connected to the bottom end of the upper tube body, and the top end of the upper tube body is fixedly connected to the cover plate; a rotating seat is provided on one side of the lower tube body A feed port is provided; the second sedimentation discharge pipe is connected between the upper side wall of the upper tube body and the outer wall of the processing tank, and the second hollow lifting screw is provided inside the central tube, and the top end of the rotating shaft of the second hollow lifting screw passes through the cover plate and is transmission-connected to the output shaft of the drive motor; the inner wall of the rotating tube is fixed to the outer edge of the second hollow lifting screw, and the hollow pressing screw is fixed to the outer wall of the rotating tube and the lower tube body, and the bottom end of the hollow pressing screw passes through the feed port and is fixedly connected to the inner wall of the rotating seat.

7. The chemical analysis waste liquid treatment device according to claim 6, characterized in that: A filter plate is fixed inside the bottom end of the rotating seat, and the bottom end of the rotating shaft of the second hollow lifting spiral is fixedly connected to the middle part of the filter plate.

8. The chemical analysis waste liquid treatment device according to claim 6, characterized in that: A spiral scraper matching the inner wall of the processing tank is fixed on the outer edge of the hollow pressing spiral.

9. The chemical analysis waste liquid treatment device according to claim 6, characterized in that: A fixed scraper is fixed on the outer wall of the rotating seat and is in sliding contact with the conical tank bottom of the processing tank.

10. The chemical analysis waste liquid treatment device according to claim 6, characterized in that: A heating device is provided on the side wall of the processing tank.

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