Device for treating chemical waste liquid

Abstract

This invention discloses a device for treating chemical waste liquid, comprising a lower steel frame, with an upper steel frame welded to its top. An acid recovery tank and an alkali recovery tank are respectively installed on both sides of the top of the upper steel frame. A dual-chamber neutralization liquid supply tank is installed on the top of the upper steel frame between the acid and alkali recovery tanks. The dual-chamber neutralization liquid supply tank is used to isolate and store the acidic and alkaline treatment liquids. This invention uses two pumping and lifting units to deliver the waste liquids to the corresponding acid and alkali recovery tanks. When acidic or alkaline waste liquids are poured into the recovery tanks, the pumping and lifting units deliver the treated liquids into the recovery tanks, where they undergo an acid-base neutralization reaction. During the reaction, a pH sensor continuously monitors the pH value in the recovery tanks. Simultaneously, a pulley drive module and an auger-type dual-zone solid-liquid separation module work together to ensure effective separation of the precipitate and liquid from the reaction products.

Description

Technical Field

[0001] This invention relates to the field of waste liquid treatment technology, specifically to a device for treating chemical waste liquid. Background Technology

[0002] In chemical experiments, the generation of acid and alkali waste liquids is one of the common wastes. These typically include acidic waste liquids (such as sulfuric acid, hydrochloric acid, nitric acid, etc.) and alkaline waste liquids (such as sodium hydroxide, potassium hydroxide, ammonia water, etc.). If these waste liquids are discharged directly without treatment, they will not only cause serious environmental pollution, but may also threaten human health. Therefore, they must be treated scientifically and effectively. Commonly used acid and alkali waste liquid treatment devices include acid-base neutralization reaction tanks, neutralization towers, and acid-base waste liquid neutralization pools. Acid-base neutralization reaction tanks adjust the pH value of the waste liquid by adding appropriate amounts of acid or alkali. They are usually equipped with stirring devices, temperature control systems, and pH monitors to ensure the completeness and safety of the reaction. Neutralization pools centrally treat acid and alkali waste liquids in wastewater. After adding acid or alkali, stirring is used to ensure that the neutralization reaction is fully carried out.

[0003] As disclosed in patent announcement number CN213924171U, a waste liquid treatment device for chemical engineering includes a device body. The device body includes a collection box, and the collection box contains a treatment mechanism. The treatment mechanism includes a placement plate, which is fixedly installed inside the collection box. An acidic waste liquid tank and an alkaline waste liquid tank are fixedly installed on the top of the placement plate, respectively. A separator plate is fixedly installed inside the collection box, located between the acidic and alkaline waste liquid tanks. By setting up the acidic and alkaline waste liquid tanks, different waste liquids can be treated separately to prevent them from mixing and reacting. Then, they are neutralized in a neutralization tank. The existing acid and alkali chemical waste liquid treatment technologies and device operation methods are basically the same. The process involves adding appropriate amounts of acid or alkali to neutralize the acid or alkali in the waste liquid, bringing the pH value of the waste liquid close to neutral and completing the reaction. However, the treatment of acid and alkali chemical waste liquid will produce precipitates, which will continuously accumulate in the acid collection tank, alkali collection tank, and neutralization tank. Because the precipitates are difficult to clean, especially when they accumulate in hard-to-reach parts of the equipment, such as the inner walls of pipes and the bottom of the tank, it will lead to frequent equipment shutdowns for maintenance. Furthermore, the process of the waste liquid entering the neutralization tank from the acid and alkali waste liquid tanks is controlled by manual titration. This process has a lag effect, meaning that the pH value of the waste liquid may have changed during the reaction process, and the reaction rate of manually added acid or alkali is relatively slow, resulting in inaccurate timing of the neutralization reaction and affecting the treatment of waste liquid. Summary of the Invention

[0004] The purpose of this invention is to provide a device for treating chemical waste liquid. Acid and alkali solutions pre-stored in a dual-chamber neutralization liquid supply tank are supplied to corresponding alkali recovery tanks and acid recovery tanks respectively via two pumping and lifting units. When the acid and alkali waste liquids are poured into the corresponding recovery tanks, the pumping and lifting units send the treated liquid into the recovery tanks to undergo an acid-alkali neutralization reaction with the waste liquid. During the reaction, a pH sensor continuously monitors the pH value in the recovery tanks. Simultaneously, a pulley drive module enables the mixing structure in the recovery tanks and the auger-type dual-zone solid-liquid separation module to work together, thereby promoting rapid pH adjustment and separating the precipitate and liquid after the reaction, thus solving the problems mentioned in the background art.

[0005] To achieve the above objectives, the present invention provides the following technical solution: an apparatus for treating chemical waste liquid, comprising:

[0006] A lower steel structure frame is provided, with an upper steel structure frame welded to its top. An acid recovery tank and an alkali recovery tank are respectively installed on both sides of the top of the upper steel structure frame. A dual-chamber neutralization liquid supply tank is installed on the top of the upper steel structure frame between the acid and alkali recovery tanks. The dual-chamber neutralization liquid supply tank is used to isolate and store the acidic and alkali treatment liquids. Pumping and lifting units are installed on both sides of the top of the upper steel structure frame. These units pump the treatment liquid from the dual-chamber neutralization liquid supply tank into the recovery tanks, where it undergoes acid-alkali neutralization with the waste liquid. pH sensors are installed on the inner walls of the acid and alkali recovery tanks, which are close to each other.

[0007] A screw conveyor-type dual-zone solid-liquid separation module is installed at the bottom of the acid recovery tank and the alkali recovery tank. This module simultaneously separates the liquid and precipitate generated by the acid-alkali reaction in both tanks. A mixing structure is provided at one end of each tank. A pulley drive module for driving the screw conveyor-type dual-zone solid-liquid separation module and the mixing structure is installed on one outer wall of the lower steel frame. A control panel is installed on one side of the lower steel frame. The output of the control panel is electrically connected to the input of the pulley drive module and the pumping unit. The output of the pH sensor is also electrically connected to the input of the control panel.

[0008] Preferably, both the acid recovery tank and the alkali recovery tank are equipped with perforated plates at their bottom openings.

[0009] Preferably, a sealing plate is installed at the opening position at the bottom of the acid recovery tank and the alkali recovery tank, and a solenoid valve is installed on one side of the bottom of the sealing plate. The input end of the solenoid valve is electrically connected to the output end of the control panel.

[0010] Preferably, the auger-type dual-zone solid-liquid separation module is located at the bottom of the sealing plate. Waste liquid collection tanks are installed on both sides of the bottom of the lower steel structure frame. The waste liquid collection tanks are located below the drain end of the auger-type dual-zone solid-liquid separation module. Drain valves are installed on the outer walls of the two waste liquid collection tanks on the side furthest from each other. A sedimentation tank is installed on the outer wall of the waste liquid collection tank near the vertical center reference plane of the lower steel structure frame. The sedimentation tank is located below the sediment discharge end of the auger-type dual-zone solid-liquid separation module.

[0011] Preferably, the dual-chamber neutralizing liquid supply tank includes a frame fixed at the top center of the screw conveyor-type dual-zone solid-liquid separation module and a conical liquid storage tank installed at the top of the frame, wherein a baffle is installed on the vertical center reference surface of the conical liquid storage tank.

[0012] Preferably, the conical liquid storage tanks on both sides of the partition are respectively provided with a first chamber and a second chamber. The top of the conical liquid storage tank is provided with liquid inlets on both sides, and the bottom of the conical liquid storage tank is provided with a first drain outlet and a second drain outlet on both sides. The first drain outlet and the second drain outlet are both connected to a pumping and lifting unit.

[0013] Preferably, the pumping and lifting unit includes an inlet pipe installed at the bottom of the first and second drain outlets, a transfer pump installed at the end of the inlet pipe away from the conical storage tank, and an L-shaped drain pipe installed at the drain end of the transfer pump, the L-shaped drain pipe extending upward and into the interior of the recovery tank.

[0014] Preferably, the auger-type dual-zone solid-liquid separation module includes a dual-chamber separation box fixed at the bottom opening of the alkali recovery tank and the dual-chamber neutralizing liquid supply tank, a first horizontal shaft rotatably installed inside the dual-chamber separation box, spiral auger blades fixed at both ends of the surface of the first horizontal shaft, and a drain hole provided at the bottom of the dual-chamber separation box. The drain hole is located above the waste liquid collection tank. A right-angle waste discharge pipe is installed at one end inside the dual-chamber separation box. The right-angle waste discharge pipe is located above the sedimentation tank. Guide plates are installed on both the left and right outer walls of the dual-chamber separation box.

[0015] Preferably, the pulley drive module includes a straight-groove protective shell installed on one side of the outer wall of the lower steel structure frame, a geared motor installed on one side of the outer wall of the straight-groove protective shell, and a pulley transmission structure installed at the output end of the geared motor for driving the first horizontal shaft and the mixing structure to rotate.

[0016] Preferably, the mixing structure consists of a second horizontal shaft and a three-bladed stirring sleeve. The second horizontal shaft is rotatably installed at one end inside the acid recovery tank. One end of the second horizontal shaft extends through to the outside of the conical storage tank and into the inside of the alkali recovery tank. The three-bladed stirring sleeve is installed at one end of the surface of the second horizontal shaft.

[0017] Compared with the prior art, the beneficial effects of the present invention are as follows: This device for treating chemical waste liquid comprises a dual-chamber neutralization liquid supply tank, two pumping and lifting units, a pH sensor, a mixing structure, and a screw conveyor-type dual-zone solid-liquid separation module, among other components working in concert. The acid and alkali solutions pre-stored in the dual-chamber neutralization liquid supply tank are respectively pumped to the corresponding acid and alkali recovery tanks by the two pumping and lifting units. When the acid and alkali waste liquids are poured into the recovery tanks, the treated liquid is pumped into the recovery tanks by the pumping and lifting units, where it undergoes an acid-alkali neutralization reaction with the waste liquid. During the reaction, the pH sensor continuously monitors the pH value in the recovery tanks. Simultaneously, the pulley drive module and the screw conveyor-type dual-zone solid-liquid separation module work together to ensure effective separation of the precipitate and liquid from the reaction products. The neutralization reaction of the acid and alkali waste liquids is achieved through a dual-chamber neutralization system. The liquid supply tank is pre-stored with acid and alkali solutions for regulation. Since the acid and alkali solutions exist separately in two recovery tanks and are precisely controlled and supplied by the pumping and lifting unit, it ensures that the acid and alkali components in the waste liquid are quickly and fully neutralized. Through the precise control of the pumping and lifting unit, the flow rate of the acid and alkali solutions can be adjusted as needed. The pH sensor continuously monitors the pH value changes in the recovery tank and can promptly report changes in the acidity and alkalinity of the waste liquid. When the pH value of the waste liquid does not reach the predetermined neutralization standard, the control panel adjusts the supply of acid and alkali solutions based on the sensor feedback to ensure that the reaction process is always in the optimal state. The mixing structure also allows the acidic and alkaline waste liquids to come into full contact in a short time, resulting in a more complete reaction. Thus, without the need for manual intervention, the reaction conditions can be quickly adjusted to ensure that the waste liquid neutralization reaction proceeds in a stable state.

[0018] After the neutralization reaction is completed, the precipitate and liquid in the waste liquid need to be effectively separated. The mixed liquid structure and the screw conveyor-type dual-zone solid-liquid separation module, through the synergistic action of the pulley drive module, can stir the mixed liquid in the recovery tank evenly, and promote the separation of solid precipitate through the rotation of the screw conveyor. At this time, by collecting the separated liquid and precipitate separately, both can be effectively treated and recovered. The liquid part can be further purified or discharged, while the precipitate can be disposed of through other means to avoid pollution. This ensures that the waste liquid is effectively recovered and disposed of, and at the same time, it can effectively prevent the accumulation of precipitate, thereby ensuring the stable operation of the device, reducing the blockage and corrosion of reaction vessels and pipelines by precipitate, thereby reducing equipment damage and downtime, and lowering the frequency of maintenance and repair. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the main structure of the present invention;

[0020] Figure 2 This is a schematic diagram of the three-dimensional structure of the present invention. Figure 1 ;

[0021] Figure 3This is a schematic diagram of the upper and lower isometric isometric solid structure of the present invention;

[0022] Figure 4 This is a schematic diagram of the three-dimensional structure of the present invention. Figure 2 ;

[0023] Figure 5 This is a schematic diagram of the front cross-sectional structure of the present invention;

[0024] Figure 6 This is a three-dimensional cross-sectional view of the dual-chamber neutralizing liquid supply tank according to Embodiment 2 of the present invention;

[0025] Figure 7 This is a three-dimensional cross-sectional structural diagram of Embodiment 3 of the present invention;

[0026] Figure 8 This is a three-dimensional structural diagram of the acid recovery tank after dismantling in Embodiment 3 of the present invention.

[0027] In the diagram: 1. Lower steel structure frame; 2. Upper steel structure frame; 3. Acid recovery tank; 301. With perforated plate; 4. Alkali recovery tank; 5. Dual-chamber neutralization liquid supply tank; 501. Frame; 502. Conical storage tank; 503. Baffle; 5031. First chamber; 5032. Second chamber; 504. Drain port one; 505. Drain port two; 6. Pumping and lifting unit; 601. Transfer pump; 602. Inlet pipe; 603. L-shaped drain. 7. Screwdriver-type dual-zone solid-liquid separation module; 701. Guide plate; 702. First horizontal shaft; 703. Spiral screwdriver blade; 704. Drain hole; 705. Right-angle waste discharge pipe; 706. Dual-chamber separation box; 8. Waste liquid collection box; 801. Drain valve; 9. Sedimentation box; 10. Mixing structure; 1001. Second horizontal shaft; 1002. Three-blade stirring sleeve; 11. Pulley drive module; 12. Control panel; 13. pH sensor. Detailed Implementation

[0028] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without creative effort are within the scope of protection of the present invention.

[0029] Example 1, by Figures 1 to 5The present invention includes a lower steel frame 1, with an upper steel frame 2 welded to the top of the lower steel frame 1. An acid recovery tank 3 and an alkali recovery tank 4 are respectively installed on both sides of the top of the upper steel frame 2. A dual-chamber neutralization liquid supply tank 5 is installed on the top of the upper steel frame 2 between the acid recovery tank 3 and the alkali recovery tank 4. The dual-chamber neutralization liquid supply tank 5 is used to isolate and store acidic and alkaline treatment liquids. Pumping and lifting units 6 are installed on both sides of the top of the upper steel frame 2. The pumping and lifting units 6 are used to pump the treatment liquid from the dual-chamber neutralization liquid supply tank 5 into the recovery tanks and perform acid-base neutralization reactions with the waste liquid. A pH sensor 13 is installed on the inner walls of the acid recovery tank 3 and the alkali recovery tank 4, respectively. Real-time monitoring by the pH sensor 13 ensures that the neutralization reaction of the acid and alkali waste liquid in the recovery tanks is carried out within a suitable pH range, avoiding over- or under-reaction, thereby improving the neutralization effect.

[0030] A screw conveyor-type dual-zone solid-liquid separation module 7 is installed at the bottom of the acid recovery tank 3 and the alkali recovery tank 4. The screw conveyor-type dual-zone solid-liquid separation module 7 is used to simultaneously separate the liquid and precipitate generated by the acid-alkali reaction in the acid recovery tank 3 and the alkali recovery tank 4. A mixing structure 10 is provided at one end of the interior of the acid recovery tank 3 and the alkali recovery tank 4. A pulley drive module 11 for driving the screw conveyor-type dual-zone solid-liquid separation module 7 and the mixing structure 10 is installed on one side of the outer wall of the lower steel structure frame 1. A control panel 12 is installed on one side of the surface of the lower steel structure frame 1. The output end of the control panel 12 is electrically connected to the input end of the pulley drive module 11 and the pumping and lifting unit 6. The output end of the pH sensor 13 is electrically connected to the input end of the control panel 12.

[0031] A perforated plate 301 is installed at the bottom opening of both acid recovery tank 3 and alkali recovery tank 4. A sealing plate is installed at the bottom opening of both acid recovery tank 3 and alkali recovery tank 4. A solenoid valve is installed on one side of the bottom of the sealing plate. The input end of the solenoid valve is electrically connected to the output end of the control panel 12.

[0032] The perforated plate 301 can also be replaced with a sealing plate, and a solenoid valve is installed at the bottom of the sealing plate. The solenoid valve is electrically connected to the output of the control panel 12. At this time, the alkali recovery tank 4, the acid recovery tank 3 and the screw conveyor type dual-zone solid-liquid separation module 7 are isolated from each other by the solenoid valve and can be controlled to open and close. After the acid-base neutralization reaction in the acid recovery tank 3 and the alkali recovery tank 4 is completed, the solenoid valve is controlled to be open by the control panel 12, so that the reactants are discharged into the screw conveyor type dual-zone solid-liquid separation module 7 through the solenoid valve, thereby better completing the treatment of chemical waste liquid.

[0033] The auger-type dual-zone solid-liquid separation module 7 is located at the bottom of the sealing plate. Waste liquid collection tanks 8 are installed on both sides of the bottom of the lower steel structure frame 1. The waste liquid collection tanks 8 are located below the discharge end of the auger-type dual-zone solid-liquid separation module 7. Drain valves 801 are installed on the outer wall of the two waste liquid collection tanks 8 on the side away from each other. A sedimentation tank 9 is installed on the outer wall of the waste liquid collection tank 8 near the vertical center reference plane of the lower steel structure frame 1. The sedimentation tank 9 is located below the sediment discharge end of the auger-type dual-zone solid-liquid separation module 7. The auger-type dual-zone solid-liquid separation module 7 separates the liquid after the reaction and the generated sediment. The liquid and sediment at the separation point are discharged into the interior of the waste liquid collection tank 8 and the sedimentation tank 9, respectively. At this time, the liquid in the waste liquid collection tank 8 is discharged through the drain valve 801, while the sediment in the sedimentation tank 9 needs to be cleaned periodically.

[0034] Example 2, based on Example 1, is... Figure 6 The dual-chamber neutralizing liquid supply tank 5 includes a frame 501 fixed at the center of the top of the screw conveyor-type dual-zone solid-liquid separation module 7 and a conical storage tank 502 installed at the top of the frame 501. A partition 503 is installed on the vertical center reference surface of the conical storage tank 502. The conical storage tank 502 on both sides of the partition 503 is respectively provided with a first chamber 5031 and a second chamber 5032. Both sides of the top of the conical storage tank 502 are provided with liquid inlets. The bottom of the conical storage tank 502 is provided with a first drain port 504 and a second drain port 505 on both sides. Both the first drain port 504 and the second drain port 505 are connected to a pumping and lifting unit 6.

[0035] The staff pre-poured the acid and alkali treatment solutions to be used into the first chamber 5031 and the second chamber 5032 of the dual-chamber neutralization liquid supply tank 5. The two chambers are separated by a partition 503 and can enter the corresponding pumping and lifting unit 6 through the first drain port 504 and the second drain port 505. By storing the acid and alkali solutions separately, the mixing of the acid and alkali solutions is avoided, preventing dangerous reactions. Each chamber can be operated independently as needed, ensuring the flexibility and accuracy of liquid supply. In addition, the dual-chamber neutralization liquid supply tank 5 has a large storage capacity, which can meet the needs of large-scale waste liquid treatment and reduce the trouble of frequent liquid replacement.

[0036] The pumping and lifting unit 6 includes an inlet pipe 602 installed at the bottom of the first drain port 504 and the second drain port 505, a transfer pump 601 installed at the end of the inlet pipe 602 away from the conical storage tank 502, and an L-shaped drain pipe 603 installed at the drain end of the transfer pump 601. The L-shaped drain pipe 603 extends upward and into the interior of the recovery tank. When the pumping and lifting unit 6 supplies the treatment liquid to the acid recovery tank 3 or the alkali recovery tank 4, the treatment liquid in the chamber of the conical storage tank 502 enters the corresponding inlet pipe 602 through the second drain port 505 or the first drain port 504. After the transfer pump 601 works, it sends the treatment liquid into the recovery tank through the L-shaped drain pipe 603 and performs an acid-base neutralization reaction with the waste liquid. This efficiently lifts the treatment liquid from a low level to a high level in the recovery tank. Under the feedback of the pH sensor 13, it ensures that the inflow of acid and alkali liquid is synchronized with the pH value change of the waste liquid, thereby achieving the best neutralization effect.

[0037] Example 3, based on Example 2, by Figure 7 and Figure 8 The screw conveyor type dual-zone solid-liquid separation module 7 includes a dual-chamber separation box 706 fixed at the bottom opening of the alkali recovery tank 4 and the dual-chamber neutralization liquid supply tank 5, a first horizontal shaft 702 rotatably installed inside the dual-chamber separation box 706, screw conveyor blades 703 fixed at both ends of the surface of the first horizontal shaft 702, and a drain hole 704 set at the bottom of the dual-chamber separation box 706. The drain hole 704 is located above the waste liquid collection tank 8. A right-angle waste discharge pipe 705 is installed at one end inside the dual-chamber separation box 706. The right-angle waste discharge pipe 705 is located above the sedimentation tank 9. Guide plates 701 are installed on both the left and right outer walls of the dual-chamber separation box 706. The operator can install a filter membrane on the lower surface of the dual-chamber separation box 706 to better separate the solid and liquid. At the same time, a valve body can be installed at the bottom opening of the right-angle waste discharge pipe 705 to control whether the sediment is discharged from the dual-chamber separation box 706.

[0038] The pulley drive module 11 includes a straight groove protective shell installed on one side of the outer wall of the lower steel structure frame 1, a geared motor installed on one side of the outer wall of the straight groove protective shell, and a pulley transmission structure installed at the output end of the geared motor for driving the first horizontal shaft 702 and the mixing structure 10 to rotate.

[0039] During the rotation of the second horizontal shaft 1001 driven by the pulley drive module 11, the first horizontal shaft 702 in the dual-chamber separation box 706 will also be rotated. The spiral auger blade 703 will push the waste liquid and sediment from the recovery box toward the right-angle waste discharge pipe 705. During the pushing process, the liquid is discharged through the drain hole 704 and enters the waste liquid collection box 8, while the sediment moves along the extension direction of the chamber of the dual-chamber separation box 706 until it enters the sedimentation box 9 through the right-angle waste discharge pipe 705, thereby completing the solid-liquid separation and collection.

[0040] The mixing structure 10 consists of a second horizontal shaft 1001 and a three-bladed stirring sleeve 1002. The second horizontal shaft 1001 is rotatably installed at one end inside the acid recovery tank 3. One end of the second horizontal shaft 1001 extends through to the outside of the conical storage tank 502 and into the inside of the alkali recovery tank 4. The three-bladed stirring sleeve 1002 is installed at one end of the surface of the second horizontal shaft 1001. When the pulley drive module 11 is working, it synchronously provides rotational power to the auger-type dual-zone solid-liquid separation module 7 and the mixing structure 10. Under the drive of the pulley drive module 11, the second horizontal shaft 1001 and the three-bladed stirring sleeve 1002 continuously stir the liquid inside the acid recovery tank 3 and the alkali recovery tank 4, ensuring that the acid and alkali solutions and the neutralizing solution are in full contact, ensuring the uniformity of the neutralization reaction, and improving the neutralization effect. At the same time, by continuously stirring, the reaction speed of the acid and alkali components in the acid and alkali waste liquid with the neutralizing solution is accelerated, shortening the processing time and improving efficiency.

[0041] Before starting the process, the staff needs to check and prepare the equipment. They need to ensure that the dual-chamber neutralization liquid supply tank 5 used to store the acid and alkali treatment solution is in good condition and that the storage of acid and alkali is sufficient. They also need to check whether the pumping and lifting unit 6, pH sensor 13, mixing structure 10, and screw conveyor type dual-zone solid-liquid separation module 7 are operating normally and whether there are any leaks in acid recovery tank 3 and alkali recovery tank 4. After the check is completed, the staff operates the control panel 12 to ensure that the pH sensor 13, pulley drive module 11, mixing structure 10, and screw conveyor type dual-zone solid-liquid separation module 7 are all started and in working condition.

[0042] Workers pour the acid and alkali waste liquids to be treated into acid recovery tank 3 and alkali recovery tank 4, respectively. When pouring the waste liquid into the recovery tanks, workers must ensure that the amount of waste liquid does not exceed the capacity of the tanks to prevent overflow and environmental pollution. After the waste liquids are poured out and treatment is required, workers set the supply flow rates of acid and alkali to alkali recovery tank 4 and acid recovery tank 3 on control panel 12. Control panel 12 and pumping unit 6 adjust the injection rates of acid and alkali according to the pH of the waste liquids to be treated, thus controlling the flow through the two pumps. The pumping unit 6 rapidly delivers the pre-stored acid or alkali solution in the dual-chamber neutralization liquid supply tank 5 to the corresponding recovery tank for neutralization reaction with the waste liquid. During the reaction, the pH sensor 13 continuously monitors the pH value in the recovery tank and feeds the pH value back to the control panel 12 via an electrical signal. If the pH value is too low or too high, the control panel 12 and the pumping unit 6 automatically adjust the supply of acid or alkali solution to ensure that the pH value is maintained within the appropriate range for the neutralization reaction until the pH value reaches the predetermined standard. During this process, frequent manual intervention is not required.

[0043] After the acid-base neutralization reaction is completed inside the acid recovery tank 3 and the alkali recovery tank 4, precipitates will be generated in the waste liquid. During this period, the mixing structure 10 in the acid recovery tank 3 and the alkali recovery tank 4 can help stir the liquid in the recovery tank, ensuring that the acid-base neutralization reaction proceeds uniformly and promoting the sedimentation of solid precipitates. The pulley drive module 11 and the auger-type dual-zone solid-liquid separation module 7 help accelerate the separation of solid precipitates through the rotation of the auger and quickly compress the precipitates to the bottom of the recovery tank. The auger-type dual-zone solid-liquid separation module 7 separates the liquid and solid precipitates and discharges them into the waste liquid collection tank 8 and the sedimentation tank 9 respectively. The liquid and solid precipitates in the waste liquid collection tank 8 and the sedimentation tank 9 can be further purified or discharged or recycled if they have reached safety standards. After each waste liquid treatment task is completed, the staff needs to clean and maintain the equipment to ensure that each part of the device operates normally.

[0044] It should be noted that, in this document, relational terms such as first and second, etc., are used only to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the terms "comprises," "comprising," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that includes a list of elements includes not only those elements but also other elements not explicitly listed, or elements inherent to such process, method, article, or apparatus.

[0045] While embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions, and variations may be made to these embodiments without departing from the principles and spirit of the invention, and that the scope of the invention is defined by the appended claims and their equivalents.

Claims

1. An apparatus for treating chemical waste liquid, characterized in that, include: The lower steel structure frame (1) is welded to the top of the upper steel structure frame (2), and acid recovery tank (3) and alkali recovery tank (4) are respectively installed on both sides of the top of the upper steel structure frame (2). A double-chamber neutralization liquid supply tank (5) is installed on the top of the upper steel structure frame (2) between the acid recovery tank (3) and the alkali recovery tank (4). The double-chamber neutralization liquid supply tank (5) is used to isolate and store acidic treatment liquid and alkali treatment liquid. Pumping and lifting units (6) are installed on both sides of the top of the upper steel structure frame (2). Pumping and lifting units (6) are used to pump the treatment liquid in the double-chamber neutralization liquid supply tank (5) into the recovery tank and perform acid-base neutralization reaction with the waste liquid. pH sensors (13) are installed on the inner walls of the acid recovery tank (3) and the alkali recovery tank (4) respectively. A screw conveyor-type dual-zone solid-liquid separation module (7) is installed at the bottom of the acid recovery tank (3) and the alkali recovery tank (4). The screw conveyor-type dual-zone solid-liquid separation module (7) is used to simultaneously separate the liquid and precipitate generated by the acid-base reaction in the acid recovery tank (3) and the alkali recovery tank (4). A mixing structure (10) is provided at one end of the interior of the acid recovery tank (3) and the alkali recovery tank (4). A pulley drive module (11) for driving the screw conveyor-type dual-zone solid-liquid separation module (7) and the mixing structure (10) is installed on one side of the outer wall of the lower steel frame (1). A control panel (12) is installed on one side of the surface of the lower steel frame (1). The output end of the control panel (12) is electrically connected to the input end of the pulley drive module (11) and the pumping and lifting unit (6). The output end of the pH sensor (13) is electrically connected to the input end of the control panel (12). A sealing plate is installed at the opening position at the bottom of the acid recovery tank (3) and the alkali recovery tank (4). A solenoid valve is installed on one side of the bottom of the sealing plate. The input end of the solenoid valve is electrically connected to the output end of the control panel (12). The auger-type dual-zone solid-liquid separation module (7) is located at the bottom of the sealing plate. Waste liquid collection tanks (8) are installed on both sides of the bottom of the lower steel structure frame (1). The waste liquid collection tanks (8) are located below the drain end of the auger-type dual-zone solid-liquid separation module (7). Drain valves (801) are installed on the outer walls of the two waste liquid collection tanks (8) on the side away from each other. A sedimentation tank (9) is installed on the outer wall of the waste liquid collection tank (8) near the vertical center reference plane of the lower steel structure frame (1). The sedimentation tank (9) is located below the sediment discharge end of the auger-type dual-zone solid-liquid separation module (7). The dual-chamber neutralizing liquid supply tank (5) includes a frame (501) fixed at the top center of the screw conveyor type dual-zone solid-liquid separation module (7) and a conical liquid storage tank (502) installed at the top of the frame (501). A partition (503) is installed on the vertical center reference surface of the conical liquid storage tank (502).

2. The apparatus for treating chemical waste liquid according to claim 1, characterized in that: Both the acid recovery tank (3) and the alkali recovery tank (4) are equipped with perforated plates (301) at the bottom openings.

3. The apparatus for treating chemical waste liquid according to claim 1, characterized in that: The conical storage tanks (502) on both sides of the partition (503) are respectively provided with a first chamber (5031) and a second chamber (5032). Both sides of the top of the conical storage tank (502) are equipped with liquid inlets. Both sides of the bottom of the conical storage tank (502) are respectively provided with a first drain port (504) and a second drain port (505). Both the first drain port (504) and the second drain port (505) are connected to a pumping and lifting unit (6).

4. The apparatus for treating chemical waste liquid according to claim 3, characterized in that: The pumping and lifting unit (6) includes an inlet pipe (602) installed at the bottom of the first drain port (504) and the second drain port (505), a transfer pump (601) installed at the end of the inlet pipe (602) away from the conical storage tank (502), and an L-shaped drain pipe (603) installed at the drain end of the transfer pump (601). The L-shaped drain pipe (603) extends upward and into the interior of the recycling tank.

5. The apparatus for treating chemical waste liquid according to claim 1, characterized in that: The auger-type dual-zone solid-liquid separation module (7) includes a dual-cavity separation box (706) fixed at the bottom opening of the alkali recovery tank (4) and the dual-cavity neutralization liquid supply tank (5), a first horizontal shaft (702) rotatably installed inside the dual-cavity separation box (706), spiral auger blades (703) fixed at both ends of the surface of the first horizontal shaft (702), and a drain hole (704) provided at the bottom of the dual-cavity separation box (706). The drain hole (704) is located above the waste liquid collection tank (8). A right-angle waste discharge pipe (705) is installed at one end inside the dual-cavity separation box (706). The right-angle waste discharge pipe (705) is located above the sedimentation tank (9). Guide plates (701) are installed on both the left and right outer walls of the dual-cavity separation box (706).

6. The apparatus for treating chemical waste liquid according to claim 5, characterized in that: The pulley drive module (11) includes a straight groove protective shell installed on one side of the outer wall of the lower steel structure frame (1), a geared motor installed on one side of the outer wall of the straight groove protective shell, and a pulley transmission structure installed at the output end of the geared motor for driving the first horizontal shaft (702) and the mixing structure (10) to rotate.

7. The apparatus for treating chemical waste liquid according to claim 6, characterized in that: The mixing structure (10) consists of a second horizontal shaft (1001) and a three-bladed stirring sleeve (1002). The second horizontal shaft (1001) is rotatably installed at one end inside the acid recovery tank (3). One end of the second horizontal shaft (1001) extends through to the outside of the conical storage tank (502) and extends to the inside of the alkali recovery tank (4). The three-bladed stirring sleeve (1002) is installed at one end of the surface of the second horizontal shaft (1001).

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