Acid phosphate and lime co-pH adjustment device

Abstract

The utility model relates to the field of contaminated soil remediation technology discloses a kind of acidic phosphate and lime cooperative pH regulating device, and reaction tank is equipped with two groups, for the pH adjustment of liquid medicine provides reaction chamber;Acidic phosphate dosing system is equipped with two groups and respectively for adding acidic phosphate to two groups of reaction tank;Lime dosing system is equipped with one group and is used to add lime material to two groups of reaction tank, and lime dosing system includes lime arch breaking device and two groups of respectively two spiral conveyors of reaction tank feeding;Two groups of reaction tank are connected two sets of acidic phosphate dosing system and a set of lime dosing system respectively, and linkage control is realized by pH sensor and PLC controller, and reagent tank guarantees reagent supply, metering pump and dosing pipeline ensure that reagent is accurately conveyed, lime arch breaking device can avoid lime to form arch structure, avoid lime blockage, so that lime dosing has good continuity and stability.

Description

Technical Field

[0001] This utility model belongs to the field of contaminated soil remediation technology, specifically relating to a pH adjustment device that uses acidic phosphate and lime in synergy. Background Technology

[0002] Industrial production and agricultural activities generate large amounts of contaminated soil, among which soil pH is an important indicator of soil quality. Many contaminated soils have pH values ​​that deviate from the neutral range; excessively acidic or alkaline soils, if left unremediated, can cause serious damage to the soil ecosystem, such as affecting soil microbial activity and reducing soil fertility. Therefore, pH adjustment of contaminated soil is a crucial step in the soil remediation process.

[0003] Currently, common methods for soil pH adjustment involve using acidic or alkaline agents to neutralize the soil, bringing its pH level to a suitable level for plant growth or subsequent remediation processes. In practice, acidic phosphates and lime are commonly used agents; acidic phosphates provide an acidic environment, while lime is an economical and effective alkaline regulator. However, existing soil pH adjustment devices have some problems in actual operation and cannot meet the demands for efficient, precise, and environmentally friendly treatment.

[0004] Existing soil remediation pH adjustment devices typically only have one reaction tank, allowing for the treatment of one batch of soil at a time. When treating large quantities of contaminated soil or soils of varying properties, it is necessary to wait for the reaction tank to complete one treatment before proceeding to the next, resulting in low treatment efficiency. Moreover, if the reaction tank malfunctions, the entire soil remediation system will cease to function properly, severely impacting the continuity of remediation efforts. Some devices use a single dosing system to supply chemicals to multiple reaction tanks, making it impossible to precisely control the dosage based on the specific conditions of the chemicals in each tank. The chemical content and initial pH value may differ between different reaction tanks, and uniform dosing can easily lead to over- or under-dosing, affecting the effectiveness of pH adjustment. Traditional lime dosing systems lack arch-breaking devices, allowing lime to easily form arch structures during storage and transportation, leading to lime blockage and affecting the continuity and stability of dosing.

[0005] In view of this, we propose a soil pH adjustment device that uses acidic phosphate and lime in synergy to solve the above problems. Utility Model Content

[0006] The present invention aims to solve the technical problem in the prior art where lime dosing easily forms an arch structure during storage and transportation, leading to lime blockage and affecting the continuity and stability of dosing.

[0007] To achieve the above objectives, this utility model provides the following technical solution:

[0008] A pH adjustment device using acidic phosphate and lime in synergy, comprising:

[0009] The reaction vessel is provided in two sets to provide reaction chambers for pH adjustment of the drug solution;

[0010] An acidic phosphate dosing system is provided in two sets, each used to add acidic phosphate to two separate reaction vessels;

[0011] The lime dosing system is equipped with one set of lime materials for adding to two sets of reaction tanks. The lime dosing system includes a lime arch breaking device and two sets of screw conveyors that feed the two reaction tanks respectively.

[0012] The two sets of reaction vessels are respectively connected to two sets of acidic phosphate dosing systems and one set of lime dosing systems, and are linked and controlled by a pH sensor and a PLC controller.

[0013] Preferably, the reaction vessel is equipped with a stirrer, and the pH sensor is installed inside the reaction vessel. The stirrer includes a stirring motor installed on the top of the reaction vessel and a stirring rod with stirring blades that is drivenly connected to the output shaft of the stirring motor.

[0014] Preferably, the acid phosphate dosing system includes a storage tank, a metering pump, and a dosing pipeline. The dosing pipeline connects the storage tank and the reaction tank, and the metering pump is installed on the dosing pipeline and is used to add acid phosphate from the storage tank to the reaction tank.

[0015] Preferably, the lime arch-breaking device includes a bucket-shaped tank, a servo geared motor fixed to the bottom of the bucket-shaped tank, an arch-breaking shaft fixedly connected to the output shaft of the servo geared motor and located inside the bucket-shaped tank, and an arch-breaking arm fixed to the arch-breaking shaft.

[0016] Preferably, the hopper-shaped tank is equipped with two discharge ports, which are respectively connected to the inlets of two screw conveyors arranged in opposite directions.

[0017] Preferably, the discharge flange of the screw conveyor is connected to a flexible dust cover, and the bottom of the flexible dust cover is connected to a weighing hopper with its own weighing function. The discharge port of the weighing hopper is inserted into the lime feed port of the reaction tank.

[0018] Preferably, several weighing sensors are evenly distributed at the bottom of the mounting ring on the outside of the weighing hopper, and the weighing sensors are installed on the weighing platform.

[0019] Preferably, the two screw conveyors and the bucket tank are fixed on the fixed frame.

[0020] Compared with the prior art, the technical effects and advantages of this utility model are:

[0021] The two reaction tanks in this acidic phosphate and lime synergistic pH adjustment device provide the reaction space for pH adjustment of the solution. The agitator inside the reaction tank is driven by a stirring motor, rotating the stirring blades to ensure thorough mixing of the acidic phosphate, lime, and solution. A pH sensor monitors the pH value of the solution in the reaction tank in real time and transmits the data to the PLC controller. The two independent units of the acidic phosphate dosing system use metering pumps to deliver the reagent from the storage tank to the corresponding reaction tank via dosing pipelines, allowing for precise control of the dosing amount based on actual conditions. In the lime dosing system, the servo-driven reduction motor of the lime anti-bridging device drives the anti-bridging shaft and arm to rotate, preventing lime from arching and clogging. Lime is conveyed from the two outlets of the hopper tank via counter-arranged screw conveyors. The screw conveyor outlets are connected to a weighing hopper via a flexible dust cover. A weighing sensor monitors the lime weight in real time and provides feedback. The PLC controller automatically controls the dosing amount of the acidic phosphate and lime dosing system based on the pH value and weighing data.

[0022] Regarding the reaction vessels, the two sets of reaction vessels can simultaneously process different batches or flow rates of the chemical solution, improving processing efficiency and flexibility. Furthermore, if one set fails, the other can still operate, ensuring system continuity. The stirrer ensures thorough mixing of the chemical and the solution, accelerating the reaction rate and improving the uniformity, speed, effectiveness, and accuracy of pH adjustment. The pH sensor provides accurate data for dosing control, ensuring the solution pH reaches the desired level.

[0023] The acid phosphate dosing system features two independent units that precisely add chemicals based on the solution quality and initial pH value of each reaction tank, preventing waste or under-dosing and achieving accurate adjustment. A storage tank ensures chemical supply, while metering pumps and dosing pipelines guarantee accurate delivery. The lime dosing system serves two reaction tanks from a single unit, reducing equipment costs and floor space, and minimizing maintenance. An arch-breaking device ensures continuous and stable lime dosing, while a reverse screw conveyor prevents material interference, ensuring accurate lime dosage in each reaction tank. Flexible dust covers reduce dust pollution and protect personnel health; weighing hoppers and sensors precisely control lime addition, improve pH adjustment accuracy, and can also be used for production recording and analysis. Attached Figure Description

[0024] Figure 1 This is a schematic diagram of the structure of this utility model;

[0025] Figure 2 This is a schematic diagram of the lime dosing system of this utility model;

[0026] Figure 3 This is a schematic diagram of the structure of the lime dosing system of this utility model after the top cover plate of the upper bucket-shaped tank has been removed;

[0027] Figure 4 This is a schematic diagram of the acidic phosphate dosing system of this utility model.

[0028] In the diagram: 1. Reaction vessel; 11. Agitator; 2. Acidic phosphate dosing system; 21. Storage tank; 22. Dosing pipeline; 3. Lime dosing system; 31. Lime arch-breaking device; 3101. Hopper tank; 3102. Servo geared motor; 3103. Arch-breaking shaft; 3104. Arch-breaking arm; 32. Screw conveyor; 33. Flexible dust cover; 34. Weighing hopper; 35. Mounting ring; 36. Weighing sensor; 37. Weighing platform. Detailed Implementation

[0029] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0030] The following combination Figures 1 to 4 This application will be described in further detail.

[0031] This application discloses a pH adjustment device for acidic phosphate and lime, including a reaction tank 1, an acidic phosphate dosing system 2, and a lime dosing system 3. The reaction tank 1 is provided with two sets of reaction chambers for pH adjustment of the solution. The reaction tank 1 is equipped with a stirrer 11, and a pH sensor is installed inside the reaction tank 1. The stirrer 11 includes a stirring motor installed on the top of the reaction tank 1 and a stirring rod with stirring blades that is drivenly connected to the output shaft of the stirring motor.

[0032] The two sets of reaction tanks 1 can simultaneously process two different batches or different flow rates of the liquid, improving the efficiency and flexibility of the liquid treatment. When one set of reaction tanks 1 malfunctions or requires maintenance, the other set of reaction tanks 1 can continue to operate, ensuring the continuity of the entire liquid treatment system.

[0033] The stirring motor drives the stirring rod with stirring blades to rotate, which ensures that the acidic phosphate and lime materials added to reaction tank 1 are thoroughly mixed with the chemical solution. Thorough mixing helps to accelerate the chemical reaction rate, making pH adjustment more uniform and rapid, and improving the effectiveness and accuracy of pH adjustment.

[0034] A pH sensor monitors the pH value of the chemical solution in reaction tank 1 in real time, providing accurate data for subsequent dosing control. Information from the pH sensor allows for timely adjustments to the addition of acidic phosphate and lime, ensuring the pH value of the chemical solution meets the expected treatment requirements.

[0035] The acid phosphate dosing system 2 is provided with two sets, which are used to add acid phosphate to the two sets of reaction tanks 1 respectively. The acid phosphate dosing system 2 includes a storage tank 21, a metering pump and a dosing pipeline 22. The dosing pipeline 22 connects the storage tank 21 and the reaction tank 1. The metering pump is installed on the dosing pipeline 22 and is used to add the acid phosphate in the storage tank 21 to the reaction tank 1.

[0036] The acid phosphate dosing system 2 corresponds to two sets of reaction tanks 1, and can independently control the amount of acid phosphate added to each reaction tank 1. The solutions in different reaction tanks 1 may have different water qualities and initial pH values. The independent dosing system can accurately add acid phosphate according to the actual conditions of each reaction tank 1, achieving precise pH adjustment. The storage tank 21 is used to store the acid phosphate reagent, ensuring the supply of the reagent. The metering pump can precisely control the flow rate and dosage of the reagent. By adjusting the operating parameters of the metering pump, acid phosphate can be accurately added according to the actual needs of the solution, avoiding waste or insufficient addition. The dosing pipeline 22 transports the reagent from the storage tank 21 to the reaction tank 1, ensuring that the reagent can smoothly enter the reaction system.

[0037] The lime dosing system 3 is equipped with a set of lime materials for adding to two sets of reaction tanks 1. The lime dosing system 3 includes a lime arch breaking device 31 and two sets of screw conveyors 32 that respectively add materials to the two reaction tanks 1. The two sets of reaction tanks 1 are respectively connected to two sets of acidic phosphate dosing systems 2 and one set of lime dosing system 3, and are linked and controlled by a pH sensor and a PLC controller.

[0038] One lime dosing system 3 serves two reaction tanks 1, a design that reduces equipment costs and floor space. By supplying lime to both reaction tanks 1 through a single lime dosing system 3, redundant configuration of lime storage and conveying equipment is reduced, as is the workload of equipment maintenance. A pH sensor monitors the pH value within reaction tank 1 in real time and transmits the data to a PLC controller. The PLC controller automatically controls the dosing amounts of the acid phosphate dosing system 2 and the lime dosing system 3 according to a preset pH range. This coordinated control enables automated and intelligent pH adjustment of the solution, improving the accuracy and timeliness of adjustment, reducing manual intervention, and lowering labor costs.

[0039] The lime arch-breaking device 31 includes a bucket-shaped tank 3101, a servo-reduced motor 3102 fixed to the bottom of the bucket-shaped tank 3101, an arch-breaking shaft 3103 fixedly connected to the output shaft of the servo-reduced motor 3102 and located inside the bucket-shaped tank 3101, and an arch-breaking arm 3104 fixed to the arch-breaking shaft 3103. The bucket-shaped tank 3101 is provided with two discharge ports, which are respectively connected to the inlets of two screw conveyors 32 arranged in opposite directions. The two screw conveyors 32 and the bucket-shaped tank 3101 are fixed on a fixed frame.

[0040] Inside the bucket-shaped tank 3101, a servo-driven geared motor 3102 drives the arch-breaking shaft 3103 and the arch-breaking arm 3104 to rotate. Lime materials are prone to arching during storage and transportation. The rotation of the arch-breaking shaft 3103 and the arch-breaking arm 3104 can break the arch structure formed by the lime material, preventing lime from clogging inside the bucket-shaped tank 3101 and ensuring that the lime material can be smoothly discharged from the outlet, thus ensuring the continuity and stability of lime dosing.

[0041] The two discharge ports are connected to the reverse-arranged screw conveyors 32, which can simultaneously convey lime material to the two sets of reaction tanks 1. The reverse arrangement design makes the conveying of lime material more reasonable and efficient, avoids mutual interference between materials during the conveying process, and ensures that each reaction tank 1 can accurately obtain the required amount of lime.

[0042] The discharge flange of the screw conveyor 32 is connected to a flexible dust cover 33, and the bottom of the flexible dust cover 33 is connected to a weighing hopper 34 with built-in weighing. The discharge port of the weighing hopper 34 is inserted into the lime feed port of the reaction tank 1. Several weighing sensors 36 are evenly distributed on the bottom of the mounting ring 35 on the outside of the weighing hopper 34, and the weighing sensors 36 are mounted on the weighing platform 37.

[0043] The flexible dust cover 33 is installed between the discharge port of the screw conveyor 32 and the weighing hopper 34. It can prevent the lime material from generating dust during the conveying process, reduce pollution to the surrounding environment, and protect the health of the operators.

[0044] The weighing hopper 34 accurately weighs the lime material added to the reaction tank 1. The weighing sensor 36 monitors the weight changes of the material in the weighing hopper 34 in real time and feeds the data back to the control system. Through precise weighing, the amount of lime added can be accurately controlled according to the actual needs of the reagent solution in the reaction tank 1, further improving the accuracy of pH adjustment. Simultaneously, the weighing data can also be used for recording and statistical analysis of the production process.

[0045] Finally, it should be noted that the above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Although the present utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A pH adjustment device using acidic phosphate and lime in synergy, characterized in that, include: The reaction vessel (1) is provided in two sets to provide reaction chambers for pH adjustment of the drug solution; An acidic phosphate dosing system (2) is provided in two sets, each set being used to add acidic phosphate to two sets of reaction vessels (1); The lime dosing system (3) is provided with a set of lime materials for adding to two sets of reaction tanks (1). The lime dosing system (3) includes a lime arch breaking device (31) and two sets of screw conveyors (32) for adding materials to the two reaction tanks (1) respectively. The two reaction vessels (1) are connected to two acidic phosphate dosing systems (2) and a lime dosing system (3) respectively, and are linked to the PLC controller through a pH sensor.

2. The pH adjustment device for acidic phosphate and lime synergistically according to claim 1, characterized in that: A stirrer (11) is provided on the reaction vessel (1), and a pH sensor is installed inside the reaction vessel (1). The stirrer (11) includes a stirring motor installed on the top of the reaction vessel (1) and a stirring rod with stirring blades that is driven to the output shaft of the stirring motor.

3. The pH adjustment device for acidic phosphate and lime synergistically according to claim 1, characterized in that: The acid phosphate dosing system (2) includes a storage tank (21), a metering pump, and a dosing pipeline (22). The dosing pipeline (22) connects the storage tank (21) and the reaction vessel (1). The metering pump is installed on the dosing pipeline (22) and is used to add acid phosphate from the storage tank (21) to the reaction vessel (1).

4. The pH adjustment device for acidic phosphate and lime synergistically according to claim 1, characterized in that: The lime arch-breaking device (31) includes a bucket-shaped tank (3101), a servo geared motor (3102) fixed at the bottom of the bucket-shaped tank (3101), an arch-breaking shaft (3103) fixedly connected to the output shaft of the servo geared motor (3102) and located inside the bucket-shaped tank (3101), and an arch-breaking arm (3104) fixed on the arch-breaking shaft (3103).

5. The pH adjustment device for acidic phosphate and lime synergistically according to claim 4, characterized in that: The bucket-shaped tank (3101) is provided with two discharge ports, which are respectively connected to the inlets of two screw conveyors (32) arranged in opposite directions.

6. The pH adjustment device for acidic phosphate and lime synergistically according to claim 1, characterized in that: The discharge flange of the screw conveyor (32) is connected to a flexible dust cover (33), and the bottom of the flexible dust cover (33) is connected to a weighing hopper (34) with its own weighing function. The discharge port of the weighing hopper (34) is inserted into the lime feed port of the reaction tank (1).

7. The pH adjustment device for acidic phosphate and lime synergistically according to claim 1, characterized in that: Several weighing sensors (36) are evenly distributed at the bottom of the mounting ring (35) on the outside of the weighing hopper (34), and the weighing sensors (36) are installed on the weighing platform (37).

8. The pH adjustment device for acidic phosphate and lime synergistically according to claim 4, characterized in that: Two screw conveyors (32) and a bucket (3101) are fixed on a fixed frame.

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