Device for treating chemical waste liquid

Abstract

The invention discloses a chemical waste liquid treatment device which comprises a lower steel structure frame, an upper steel structure frame is welded to the top end of the lower steel structure frame, and an acid liquid recycling box and an alkali liquid recycling box are installed on the two sides of the top end of the upper steel structure frame correspondingly. And a double-cavity neutralizing liquid supply tank is mounted at the top end of the upper steel structure frame between the acid liquid recycling box and the alkali liquid recycling box and is used for isolating and storing an acid treatment liquid and an alkali treatment liquid. According to the invention, the two pumping lifting units are respectively conveyed to the corresponding acid liquor recovery box and alkali liquor recovery box, when the acid-alkali waste liquor is poured into the recovery box, the pumping lifting units are used for feeding the treatment liquor into the recovery box, and the treatment liquor and the waste liquor are subjected to acid-alkali neutralization reaction, and in the reaction process, the PH sensor can continuously monitor the PH value in the recovery box, so that the acid-alkali waste liquor can be recycled. Meanwhile, the belt wheel driving module and the auger type double-area solid-liquid separation module work cooperatively, so that precipitates and liquid of reaction products are effectively separated.

Description

Technical Field

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

[0002] In chemical experiments, the generation of acid and alkali waste liquid is one of the common wastes, usually including acidic waste liquid (such as sulfuric acid, hydrochloric acid, nitric acid, etc.) and alkaline waste liquid (such as sodium hydroxide, potassium hydroxide, ammonia water, etc.). If these waste liquids are discharged directly without treatment, they will not only cause serious pollution to the environment, but also threaten human health. Therefore, scientific and effective neutralization treatment is necessary. Commonly used acid and alkali waste liquid treatment devices include acid and alkali neutralization reaction tanks, neutralization towers and acid and alkali waste liquid neutralization tanks. The acid and alkali neutralization reaction tank adjusts the pH value of the waste liquid by adding an appropriate amount of acid or alkali. It is usually equipped with a stirring device, a temperature control system and a pH monitor to ensure the completeness and safety of the reaction. The neutralization tank centrally treats the acid and alkali waste liquid in the wastewater, and ensures the full conduction of the neutralization reaction by stirring after adding acid or alkali. For example, a waste liquid treatment device for chemical majors disclosed in the authorization announcement number CN213924171U includes a device body, the device body includes a collecting box, a processing mechanism is arranged inside the collecting box, the processing mechanism includes a placement plate, a placement plate is fixedly installed inside the collecting box, an acid waste liquid tank and an alkaline waste liquid tank are fixedly installed on the top of the placement plate, a partition plate is fixedly installed inside the collecting box, and the partition plate is located between the acid waste liquid tank and the alkaline waste liquid tank. By arranging the acid waste liquid tank and the alkaline waste liquid tank, different waste liquids can be treated separately so that the two will not mix and react, and then pass through the neutralization box for neutralization treatment. The existing acid-base chemical waste liquid treatment technology and device operation method are basically the same. That is, by adding an appropriate amount of acid or alkali to neutralize the acid or alkali in the waste liquid, the pH value of the waste liquid is close to neutral, and the reaction is completed. However, precipitates will be produced during the treatment of acid-base chemical waste liquid, and these precipitates will continue to accumulate in the acid collection box, the alkaline collection box and the neutralization box. Since the precipitates are difficult to clean, especially accumulated in the parts of the device that are difficult to access, such as the inner wall of the pipe and the bottom of the box, it will cause the equipment to be frequently shut down for maintenance. In addition, the process of the waste liquid in the acid waste liquid tank and the alkaline waste liquid tank entering the neutralization tank is controlled by manual titration. There is a lag in the reaction in this process, that is, the pH value of the waste liquid may have changed during the reaction process, and the reaction speed of the artificially added acid or alkali solution is relatively slow, resulting in inaccurate timing of the neutralization reaction, affecting the waste liquid treatment. Summary of the invention

[0003] The object of the present invention is to provide a device for treating chemical waste liquid. The acid liquid and alkali liquid pre-stored in the double-chamber neutralization liquid supply tank are respectively supplied to the corresponding alkali liquid recovery box and acid liquid recovery box through two pumping and lifting units. When the acid and alkali waste liquid are poured into the corresponding recovery box, the pumping and lifting unit sends the treated liquid into the recovery box and performs acid-base neutralization reaction with the waste liquid. During the reaction, the pH sensor continuously monitors the pH value in the recovery box. At the same time, the pulley drive module enables the mixed liquid structure in the recovery box and the auger-type double-zone solid-liquid separation module to work together to promote rapid pH adjustment and separate the precipitate and liquid after the reaction, so as to solve the problems raised in the above-mentioned background technology.

[0004] To achieve the above object, the present invention provides the following technical solution: a device for treating chemical waste liquid, comprising: A lower steel structure frame, the top of which is welded with an upper steel structure frame, and an acid recovery box and an alkali recovery box are respectively installed on both sides of the top of the upper steel structure frame, a double-chamber neutralization liquid supply tank is installed on the top of the upper steel structure frame between the acid recovery box and the alkali recovery box, and the double-chamber neutralization liquid supply tank is used to isolate and store acidic treatment liquid and alkaline treatment liquid, and both sides of the top of the upper steel structure frame are installed with pumping and lifting units, and the pumping and lifting units are used to lift the treatment liquid in the double-chamber neutralization liquid supply tank into the recovery box and react with the waste liquid for acid-base neutralization, and pH sensors are installed on the adjacent inner walls of the acid recovery box and the alkali recovery box; An auger-type dual-zone solid-liquid separation module, the auger-type dual-zone solid-liquid separation module is arranged at the bottom of the acid recovery box and the alkali recovery box, the auger-type dual-zone solid-liquid separation module is used to simultaneously separate the liquid and the precipitate produced by the acid-base reaction in the acid recovery box and the alkali recovery box, one end of the acid recovery box and the alkali recovery box is provided with a mixing liquid structure, a pulley drive module for driving the auger-type dual-zone solid-liquid separation module and the mixing liquid structure is installed on the outer wall of one side of the lower steel structure frame, a control panel is installed on one side of the surface of the lower steel structure frame, the output end of the control panel is electrically connected to the pulley drive module and the input end of the pumping and lifting unit, and the output end of the PH sensor is electrically connected to the input end of the control panel.

[0005] Preferably, a perforated plate is installed at the bottom opening position of the acid recovery tank and the alkali recovery tank.

[0006] Preferably, sealing plates are installed at the opening positions at the bottom ends of the acid recovery box and the alkali recovery box, and a solenoid valve is installed on one side of the bottom end of the sealing plate, and the input end of the solenoid valve is electrically connected to the output end of the control panel.

[0007] Preferably, the auger type dual-zone solid-liquid separation module is located at the bottom end of the sealing plate, and waste liquid collection boxes are installed on both sides of the bottom of the lower steel structure frame, the waste liquid collection box is located below the discharge end of the auger type dual-zone solid-liquid separation module, and drain valves are installed on the outer walls on the side away from each other of the two waste liquid collection boxes, and a sedimentation box is installed on the outer wall on the side of the waste liquid collection box close to the vertical center reference plane of the lower steel structure frame, and the sedimentation box is located below the sediment discharge end of the auger type dual-zone solid-liquid separation module.

[0008] Preferably, the double-chamber neutralization liquid supply tank includes a frame fixed at the top center position of the auger-type dual-zone solid-liquid separation module and a conical liquid storage tank installed on the top of the frame, and a partition is installed on the vertical center reference plane of the conical liquid storage tank.

[0009] Preferably, the first chamber and the second chamber are respectively provided inside the conical-mouth liquid storage tank on both sides of the partition, liquid inlets are installed on both sides of the top of the conical-mouth liquid storage tank, and drain port 1 and drain port 2 are respectively opened on both sides of the bottom of the conical-mouth liquid storage tank, and drain port 1 and drain port 2 are both interconnected with a pumping lifting unit.

[0010] Preferably, the pumping lifting unit includes a liquid inlet pipe installed at the bottom ends of discharge port 1 and discharge port 2, a delivery pump installed at one end of the liquid inlet pipe away from the tapered liquid storage tank, and an L-shaped discharge pipe installed at the discharge end of the delivery pump, and the L-shaped discharge pipe extends upward and extends to the interior of the recovery box.

[0011] Preferably, the auger-type dual-zone solid-liquid separation module includes a double-chamber separation box fixed at an alkali liquid recovery box, an opening at the bottom end of a double-chamber neutralization liquid supply tank, a first horizontal shaft rotatably installed inside the double-chamber separation box, spiral auger blades fixed at both ends of the surface of the first horizontal shaft, and a drainage hole arranged at the bottom end of the double-chamber separation box, the drainage hole is located above the waste liquid collection box, a right-angle waste discharge pipe is installed at one end of the double-chamber separation box, the right-angle waste discharge pipe is located above the sedimentation tank, and guide plates are installed on the left and right outer walls of the double-chamber separation box.

[0012] Preferably, the pulley drive module includes a straight-slot protective shell installed on the outer wall of one side of the lower steel structure frame, a reduction motor installed on the outer wall of one side of the straight-slot protective shell, and a pulley transmission structure installed at the output end of the reduction motor for driving the first horizontal shaft and the mixing liquid structure to rotate.

[0013] Preferably, the liquid mixing structure consists of a second horizontal shaft and a three-leaf stirring sleeve, wherein the second horizontal shaft is rotatably mounted at one end inside the acid recovery tank, one end of the second horizontal shaft passes through the outside of the tapered liquid storage tank and extends to the inside of the alkali recovery tank, and the three-leaf stirring sleeve is mounted at one end of the surface of the second horizontal shaft.

[0014] Compared with the prior art, the beneficial effects of the present invention are as follows: the device for treating chemical waste liquid is provided with a double-chamber neutralization liquid supply tank, two pumping and lifting units, a pH sensor, a mixed liquid structure, an auger-type dual-zone solid-liquid separation module and other structures that cooperate with each other. The acid and alkali liquid pre-stored in the double-chamber neutralization liquid supply tank are respectively transported to the corresponding acid recovery tank and alkali recovery tank through the two pumping and lifting units. When the acid and alkali waste liquid is poured into the recovery tank, the treated liquid is sent into the recovery tank through the pumping and lifting unit, and an acid-base neutralization reaction occurs with the waste liquid. During the reaction, the pH sensor continuously monitors the pH value in the recovery tank. At the same time, the pulley drive module and the auger-type dual-zone solid-liquid separation module work together to ensure that the precipitate and liquid of the reaction product are effectively separated; wherein the neutralization reaction of the acid and alkali waste liquid is carried out by a double-chamber neutralization The acid and alkali solution pre-stored in the liquid supply tank are adjusted. Since the acid and alkali solution exist in two recovery tanks respectively and are accurately controlled and supplied by the pumping and lifting unit, the acid and alkali components in the waste liquid are ensured to be quickly and fully neutralized. Through the precise control of the pumping and lifting unit, the flow of the acid and alkali solution can be adjusted as needed, and the pH sensor continuously monitors the pH value changes in the recovery tank, and can timely feedback the changes in the pH value 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 the acid and alkali solution according to the feedback of the sensor to ensure that the reaction process is always in the best state, and the mixing structure also allows the acidic and alkaline waste liquids to fully contact in a short time, and the reaction is more sufficient, so that the reaction conditions can be quickly adjusted without manual intervention to ensure that the waste liquid neutralization reaction is carried out in a stable state; 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 auger-type dual-zone solid-liquid separation module can stir the mixed liquid in the recovery box evenly through the synergistic effect of the pulley drive module, and promote the separation of solid precipitates through the rotation of the auger. At this time, the separated liquid and precipitate are collected separately, so that both can be effectively treated and recycled. The liquid part can be further purified or discharged, and the precipitate can be disposed of through other means to avoid pollution, so that the waste liquid can be effectively recovered and disposed of. At the same time, it can effectively prevent the accumulation of precipitates, thereby ensuring the stable operation of the device and reducing the blockage and corrosion of the reaction vessel and pipeline parts by the precipitate, thereby reducing equipment damage and downtime, and reducing the frequency of maintenance and repairs. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a schematic diagram of the main structure of the present invention; Figure 2 The three-dimensional structure of the present invention is shown in FIG. Figure 1 ; Figure 3 It is a schematic diagram of the upper and lower isometric three-dimensional structure of the present invention; Figure 4 The three-dimensional structure of the present invention is shown in FIG. Figure 2 ; Figure 5 It is a schematic diagram of the main cross-sectional structure of the present invention; Figure 6 It is a schematic diagram of a three-dimensional cross-sectional structure of a double-chamber neutralization liquid supply tank according to the second embodiment of the present invention; Figure 7 It is a schematic diagram of a three-dimensional cross-sectional structure of a third embodiment of the present invention; Figure 8 This is a schematic diagram of the three-dimensional structure of the acid recovery box after being dismantled in Example 3 of the present invention.

[0016] In the figure: 1, lower steel structure frame; 2, upper steel structure frame; 3, acid recovery box; 301, perforated plate; 4, alkali recovery box; 5, double-chamber neutralization liquid supply tank; 501, frame; 502, cone-mouth liquid storage tank; 503, partition; 5031, first chamber; 5032, second chamber; 504, drain port 1; 505, drain port 2; 6, pumping lifting unit; 601, delivery pump; 602, liquid inlet pipe; 603, L-shaped drain Tube; 7. Auger-type dual-zone solid-liquid separation module; 701. guide plate; 702. first horizontal shaft; 703. spiral auger blade; 704. drainage hole; 705. right-angle waste discharge pipe; 706. double-chamber separation box; 8. waste liquid collection box; 801. drain valve; 9. sedimentation box; 10. mixed liquid structure; 1001. second horizontal shaft; 1002. three-leaf stirring sleeve; 11. pulley drive module; 12. control panel; 13. PH sensor. DETAILED DESCRIPTION

[0017] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the accompanying drawings in the embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0018] Embodiment 1, by Figures 1 to 5The present invention comprises a lower steel structure frame 1, an upper steel structure frame 2 is welded to the top of the lower steel structure frame 1, and an acid recovery box 3 and an alkali recovery box 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 box 3 and the alkali recovery box 4, and the double-chamber neutralization liquid supply tank 5 is used to isolate and store acidic treatment liquid and alkaline treatment liquid, and pumping and lifting units 6 are installed on both sides of the top of the upper steel structure frame 2, and the pumping and lifting units 6 are used to lift the treatment liquid in the double-chamber neutralization liquid supply tank 5 into the recovery box and react with the waste liquid for acid-base neutralization, and pH sensors 13 are installed on the adjacent inner walls of the acid recovery box 3 and the alkali recovery box 4, and the real-time monitoring of the pH sensor 13 can ensure that the neutralization reaction of the acid and alkali waste liquid in the recovery box is carried out within a suitable pH value range to avoid excessive or insufficient reaction, thereby improving the neutralization effect; The auger type double-zone solid-liquid separation module 7 is arranged at the bottom of the acid recovery tank 3 and the alkali recovery tank 4. The auger type double-zone solid-liquid separation module 7 is used to simultaneously separate the liquid and the precipitate produced by the acid-base reaction in the acid recovery tank 3 and the alkali recovery tank 4. One end of the acid recovery tank 3 and the alkali recovery tank 4 is provided with a mixing liquid structure 10. A pulley drive module 11 for driving the auger type double-zone solid-liquid separation module 7 and the mixing liquid structure 10 is installed on the outer wall of one side 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 pulley drive module 11 and the input end of the pumping and lifting unit 6, and the output end of the pH sensor 13 is electrically connected to the input end of the control panel 12; A perforated plate 301 is installed at the bottom opening of the acid recovery box 3 and the alkali recovery box 4, and a sealing plate is installed at the bottom opening of the acid recovery box 3 and the alkali recovery box 4. A solenoid valve is installed on one side of the bottom end of the sealing plate, and the input end of the solenoid valve is electrically connected to the output end of the control panel 12; The perforated plate 301 can also be replaced by a sealing plate, and a solenoid valve is installed at the bottom of the sealing plate, and the solenoid valve is electrically connected to the output end of the control panel 12. At this time, the alkali recovery tank 4, the acid recovery tank 3 and the auger-type dual-zone solid-liquid separation module 7 are isolated by the solenoid valve and can be controlled to be on and off; when 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 normally open through the control panel 12, so that the reactants are discharged to the auger-type dual-zone solid-liquid separation module 7 through the solenoid valve, so as to better complete the treatment of chemical waste liquid; The auger type dual-zone solid-liquid separation module 7 is located at the bottom end of the sealing plate, and waste liquid collection boxes 8 are installed on both sides of the bottom of the lower steel structure frame 1. The waste liquid collection box 8 is located below the discharge 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 boxes 8 that are away from each other. A sedimentation box 9 is installed on the outer wall of the waste liquid collection box 8 close to the vertical center reference plane of the lower steel structure frame 1. The sedimentation box 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 reacted liquid and the generated sediment, and the liquid and sediment at the separation point are discharged into the waste liquid collection box 8 and the sedimentation box 9 respectively. At this time, the liquid in the waste liquid collection box 8 is discharged through the drain valve 801, and the sediment in the sedimentation box 9 needs to be cleaned from time to time.

[0019] Embodiment 2, based on embodiment 1, Figure 6 It is given that the double-chamber neutralization liquid supply tank 5 includes a frame 501 fixed at the center position of the top end of the auger-type dual-zone solid-liquid separation module 7 and a conical liquid storage tank 502 installed on the top end of the frame 501, a partition 503 is installed on the vertical center reference plane of the conical liquid storage tank 502, and the conical liquid storage tank 502 on both sides of the partition 503 is respectively provided with a first chamber 5031 and a second chamber 5032, and both sides of the top end of the conical liquid storage tank 502 are provided with liquid inlets, and both sides of the bottom end of the conical liquid storage tank 502 are respectively provided with a drain port 1 504 and a drain port 2 505, and the drain port 1 504 and the drain port 2 505 are both connected to a pumping and lifting unit 6; The staff pours the acid and alkali treatment liquids to be used into the first chamber 5031 and the second chamber 5032 of the double-chamber neutralization liquid supply tank 5 in advance. The two chambers are isolated by the partition 503 and can enter the corresponding pumping and lifting unit 6 through the drain port 1 504 and the drain port 2 505. The acid and alkali liquid are stored separately to avoid mixing of the acid and alkali liquids and prevent dangerous reactions. Each chamber can be operated separately as needed to ensure the flexibility and accuracy of liquid supply. The double-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. The pumping and lifting unit 6 includes an inlet pipe 602 installed at the bottom of the discharge port 1 504 and the discharge port 2 505, a delivery pump 601 installed at one end of the inlet pipe 602 away from the conical liquid storage tank 502, and an L-shaped discharge pipe 603 installed at the discharge end of the delivery pump 601. The L-shaped discharge pipe 603 extends upward and extends to the interior of the recovery box. When the treated liquid is supplied to the acid recovery tank 3 or the alkali recovery tank 4 through the pumping and lifting unit 6, the treated liquid in the chamber of the conical liquid storage tank 502 enters the corresponding inlet pipe 602 through the discharge port 2 505 or the discharge port 1 504. After the delivery pump 601 works, the treated liquid is delivered to the recovery tank through the L-shaped discharge pipe 603 and undergoes acid-base neutralization reaction with the waste liquid, thereby efficiently lifting the treated liquid from a low position to a high position in the recovery tank, and ensuring that the inflow of acid and alkali liquids keeps pace with the change in pH value of the waste liquid under the feedback of the pH sensor 13, thereby achieving the best neutralization effect.

[0020] Embodiment 3, based on embodiment 2, Figure 7 and Figure 8 It is given that the auger type double-zone solid-liquid separation module 7 includes a double-chamber separation box 706 fixed at the bottom opening position of the alkali liquid recovery box 4 and the double-chamber neutralization liquid supply tank 5, a first horizontal shaft 702 rotatably installed inside the double-chamber separation box 706, spiral auger blades 703 fixed at both ends of the surface of the first horizontal shaft 702, and a drainage hole 704 arranged at the bottom end of the double-chamber separation box 706, the drainage hole 704 is located above the waste liquid collection box 8, a right-angle waste discharge pipe 705 is installed at one end of the double-chamber separation box 706, and the right-angle waste discharge pipe 705 is located above the sedimentation box 9, and guide plates 701 are installed on the left and right outer walls of the double-chamber separation box 706. The staff can install a layer of filter membrane on the lower surface of the double-chamber separation box 706 to better perform solid-liquid separation by using the filter membrane. 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 double-chamber separation box 706. The pulley drive module 11 includes a straight notch protection shell installed on the outer wall of one side of the lower steel structure frame 1, a reduction motor installed on the outer wall of one side of the straight notch protection shell, and a pulley transmission structure installed at the output end of the reduction motor for driving the first horizontal shaft 702 and the mixing structure 10 to rotate; The pulley drive module 11 will also drive the first horizontal shaft 702 in the double-chamber separation box 706 to rotate during the process of driving the second horizontal shaft 1001 to rotate, and 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 drainage hole 704 and enters the waste liquid collection box 8, while the sediment moves along the extension direction of the chamber of the double-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; The liquid mixing structure 10 is composed of a second horizontal shaft 1001 and a three-leaf stirring sleeve 1002. The second horizontal shaft 1001 is rotatably installed at one end inside the acid recovery box 3. One end of the second horizontal shaft 1001 passes through the outside of the conical liquid storage tank 502 and extends to the inside of the alkali recovery box 4. The three-leaf 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 double-zone solid-liquid separation module 7 and the liquid mixing structure 10. Then, the second horizontal shaft 1001 and the three-leaf stirring sleeve 1002 are driven by the pulley drive module 11 to continuously stir the liquid inside the acid recovery box 3 and the alkali recovery box 4, ensuring that the acid and alkali liquid and the neutralizing liquid are fully in contact, ensuring the uniformity of the neutralization reaction, and improving the neutralization effect. At the same time, through continuous stirring, the reaction rate of the acid and alkali components in the acid and alkali waste liquid and the neutralizing liquid is accelerated, shortening the processing time and improving efficiency.

[0021] Before starting the treatment in the embodiment of the present application, the staff needs to inspect and prepare the equipment, and ensure that the double-chamber neutralization liquid supply tank 5 for storing the acid-base treatment liquid is in good condition, and the storage volume of the acid and alkali liquid is sufficient, and check whether the pumping and lifting unit 6, the pH sensor 13, the mixing liquid structure 10, and the auger-type dual-zone solid-liquid separation module 7 are operating normally, and there is no leakage in the acid recovery tank 3 and the alkali recovery tank 4. After the inspection, the staff operates the control panel 12, so that the pH sensor 13, the pulley drive module 11 and the mixing liquid structure 10, and the auger-type dual-zone solid-liquid separation module 7 are all started and in working condition; The staff pours the acid and alkali waste liquids to be treated into the acid recovery tank 3 and the alkali recovery tank 4 respectively. When the waste liquid is poured into the recovery tank, the staff needs to ensure that the amount of the waste liquid does not exceed the capacity of the recovery tank to prevent overflow and cause environmental pollution. After the waste liquid is dumped and needs to be treated, the staff sets the supply flow of acid and alkali to the alkali recovery tank 4 and the acid recovery tank 3 on the control panel 12, and the control panel 12 and the pumping and lifting unit 6 adjust the injection rate of the acid and alkali according to the treatment pH of the waste liquid, and then the two pumps are used to pump the acid and alkali into the recovery tank 3. The pumping and lifting unit 6 allows the acid or alkali solution pre-stored in the double-chamber neutralization liquid supply tank 5 to be quickly transported to the corresponding recovery box to react with the waste liquid. During the reaction, the pH sensor 13 continuously monitors the pH value in the recovery box and feeds the pH value back to the control panel 12 through an electrical signal. If the pH value is too low or too high, the control panel 12 and the pumping and lifting unit 6 automatically adjust the supply amount of the acid and alkali solution to ensure that the pH value remains within the appropriate range of the neutralization reaction until the pH value reaches the predetermined standard. No frequent manual intervention is required in the process. When the acid-base neutralization reaction inside the acid recovery tank 3 and the alkali recovery tank 4 is completed, precipitate will be generated in the waste liquid. During this period, the mixed liquid structure 10 in the acid recovery tank 3 and the alkali recovery tank 4 can help stir the liquid in the recovery tank to ensure that the acid-base neutralization reaction is carried out evenly and promote the sedimentation of the solid precipitate. The pulley drive module 11 and the auger-type dual-zone solid-liquid separation module 7 help accelerate the separation of the solid precipitate through the rotation of the auger, and quickly compress the precipitate to the bottom of the recovery tank. The auger-type dual-zone solid-liquid separation module 7 separates the liquid and the solid precipitate and discharges them into the waste liquid collection tank 8 and the sedimentation tank 9 respectively. The liquid and solid precipitate in the waste liquid collection tank 8 and the sedimentation tank 9 are further purified or have reached safety standards, and can be discharged or recycled. After each waste liquid treatment task is completed, the staff needs to clean and maintain the equipment to ensure the normal operation of each part of each device.

[0022] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device.

[0023] Although 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 the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A device for treating chemical waste liquid, characterized in that: include: A lower steel structure frame (1), the top of the lower steel structure frame (1) is welded with an upper steel structure frame (2), and an acid recovery box (3) and an alkali recovery box (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 box (3) and the alkali recovery box (4), the double-chamber neutralization liquid supply tank (5) is used to isolate and store acidic treatment liquid and alkaline treatment liquid, and pumping and lifting units (6) are installed on both sides of the top of the upper steel structure frame (2), and the pumping and lifting units (6) are used to lift the treatment liquid in the double-chamber neutralization liquid supply tank (5) into the recovery box and react with the waste liquid for acid-base neutralization, and pH sensors (13) are installed on the adjacent inner walls of the acid recovery box (3) and the alkali recovery box (4); An auger-type dual-zone solid-liquid separation module (7) is arranged at the bottom of an acid recovery tank (3) and an alkali recovery tank (4), and is used to simultaneously separate liquid and sediment generated by acid-base reaction in the acid recovery tank (3) and the alkali recovery tank (4). One end of the acid recovery tank (3) and the alkali recovery tank (4) is provided with a liquid mixing structure (10). A pulley drive module (11) for driving the auger-type dual-zone solid-liquid separation module (7) and the liquid mixing structure (10) is installed on an outer wall of one side 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 pulley drive module (11) and the input end of the pumping and lifting unit (6), and the output end of the pH sensor (13) is electrically connected to the input end of the control panel (12).

2. The device for treating chemical waste liquid according to claim 1, characterized in that: A perforated plate (301) is installed at the bottom opening of the acid recovery box (3) and the alkali recovery box (4).

3. The device for treating chemical waste liquid according to claim 1, characterized in that: A sealing plate is installed at the opening position at the bottom of the acid recovery box (3) and the alkali recovery box (4), 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 (12).

4. The device for treating chemical waste liquid according to claim 3, characterized in that: The auger-type dual-zone solid-liquid separation module (7) is located at the bottom end of the sealing plate, and waste liquid collection boxes (8) are installed on both sides of the bottom of the lower steel structure frame (1). The waste liquid collection box (8) is located below the liquid discharge end of the auger-type dual-zone solid-liquid separation module (7). A liquid discharge valve (801) is installed on the outer wall of the two waste liquid collection boxes (8) on the side away from each other. A sedimentation box (9) is installed on the outer wall of the waste liquid collection box (8) on the side close to the vertical center reference plane of the lower steel structure frame (1). The sedimentation box (9) is located below the sediment discharge end of the auger-type dual-zone solid-liquid separation module (7).

5. The device for treating chemical waste liquid according to claim 3, characterized in that: The double-chamber neutralization liquid supply tank (5) comprises a frame (501) fixed at the center position of the top end of the auger-type double-zone solid-liquid separation module (7) and a cone-mouth liquid storage tank (502) installed at the top end of the frame (501), and a partition plate (503) is installed on the vertical center reference plane of the cone-mouth liquid storage tank (502).

6. The device for treating chemical waste liquid according to claim 5, characterized in that: A first chamber (5031) and a second chamber (5032) are respectively arranged inside the conical-mouth liquid storage tank (502) on both sides of the partition (503); liquid inlets are installed on both sides of the top of the conical-mouth liquid storage tank (502); and a first liquid discharge port (504) and a second liquid discharge port (505) are respectively opened on both sides of the bottom of the conical-mouth liquid storage tank (502); and the first liquid discharge port (504) and the second liquid discharge port (505) are both interconnected with a pumping and lifting unit (6).

7. The device for treating chemical waste liquid according to claim 6, characterized in that: The pumping and lifting unit (6) comprises a liquid inlet pipe (602) installed at the bottom of the first liquid discharge port (504) and the second liquid discharge port (505), a delivery pump (601) installed at one end of the liquid inlet pipe (602) away from the conical liquid storage tank (502), and an L-shaped liquid discharge pipe (603) installed at the liquid discharge end of the delivery pump (601), wherein the L-shaped liquid discharge pipe (603) extends upward and extends to the interior of the recovery box.

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

9. The device for treating chemical waste liquid according to claim 8, characterized in that: The pulley drive module (11) comprises a straight slotted protective shell mounted on an outer wall of one side of the lower steel structure frame (1), a reduction motor mounted on an outer wall of one side of the straight slotted protective shell, and a pulley transmission structure mounted at an output end of the reduction motor and used for driving the first horizontal shaft (702) and the liquid mixing structure (10) to rotate.

10. The device for treating chemical waste liquid according to claim 9, characterized in that: The liquid mixing structure (10) is composed of a second horizontal shaft (1001) and a three-leaf stirring sleeve (1002); the second horizontal shaft (1001) is rotatably mounted at one end inside the acid recovery tank (3); one end of the second horizontal shaft (1001) passes through the outside of the tapered liquid storage tank (502) and extends to the inside of the alkali recovery tank (4); and the three-leaf stirring sleeve (1002) is mounted at one end on the surface of the second horizontal shaft (1001).

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