Medicament adding limit safety interlocking device applied to sewage treatment process

Abstract

A medicament adding limit safety interlocking device applied to a sewage treatment process comprises a tank body with a seat plate arranged at the bottom, a stirring paddle, a feeding pipe and a radar liquid level meter, a transverse support is arranged in the middle of an upper end opening of the tank body, a gear motor is arranged in the middle of the transverse support, and the stirring paddle is connected with an output shaft of the gear motor. The feeding pipe is transversely connected to the transverse supporting support, and the end opening of the feeding pipe is connected with a discharging pipe which is bent downwards and vertically stretches into the tank body. An electromagnetic valve is mounted on the feeding pipe, and a radar liquid level meter is mounted in an assembly hole in the cross brace bracket; the liquid level of liquid caustic soda fed by the feeding pipe is detected in real time through the radar liquid level meter, the automatic control electromagnetic valve is installed on the feeding pipe, a liquid level signal of the radar liquid level meter is sent to the electromagnetic valve to form limit safety interlocking of the liquid level in the tank body, and conveying and storage of the liquid caustic soda are achieved through automatic control. The safety accident that the caustic soda liquid overflows due to negligence of manual operation can be effectively avoided, and the safety of equipment in a workshop and the personal safety of personnel are guaranteed.

Description

Technical Field

[0001] This utility model relates to the field of automotive painting wastewater treatment, and in particular to a limit safety interlock device for reagent addition during wastewater treatment. Background Technology

[0002] The automotive painting process generates a large amount of wastewater containing various organic matter, heavy metal ions, and acidic and alkaline substances. Liquid alkali can be used to adjust the pH value of the wastewater to a suitable range, facilitating subsequent treatment. Furthermore, liquid alkali can react with some heavy metal ions in the wastewater to form insoluble hydroxide precipitates, thereby removing heavy metal ions and ensuring compliance with environmental emission standards.

[0003] Wastewater treatment typically involves dissolving bagged alkali blocks in storage tanks to prepare liquid alkali, which is then transferred to a temporary storage tank and added to the wastewater in measured quantities. Liquid alkali is highly corrosive to skin, wood, metal, and many other substances; therefore, the preparation and addition of liquid alkali is often located in a remote area of ​​the factory. Due to the nature and nature of the work, a single person is typically responsible for all aspects of this process, resulting in complex and varied tasks. The problem is that workers need to manually open valves to add liquid alkali to the temporary storage tank and monitor the tank level using a level gauge. However, having one person responsible for this process requires operating multiple positions simultaneously, making it difficult to keep track of the alkali level in the temporary storage tank. This can lead to the tank overflowing, seriously threatening the safety of the equipment and personnel involved. Utility Model Content

[0004] To address the aforementioned problems, this invention proposes a safety interlock device for extreme limits in the addition of chemicals during wastewater treatment.

[0005] The technical solution of this utility model is: a limit safety interlock device for reagent addition in sewage treatment process, comprising a tank with a base plate at the bottom, an agitator, a feed pipe, and a radar level gauge. The tank is made of plastic, and a horizontal support bracket is provided in the middle of the upper port of the tank. The horizontal support bracket is fixedly connected to the upper port of the tank radially. A vertically arranged reduction motor is provided in the middle of the horizontal support bracket. The upper end of the main shaft of the agitator is coaxially connected to the output shaft of the reduction motor through a coupling. The feed pipe is horizontally connected to the horizontal support bracket at the upper port of the tank. A discharge pipe that bends downward and extends vertically into the tank is connected to the port of the feed pipe. The discharge pipe and the feed pipe are connected at 90°. A solenoid valve is installed on the feed pipe, and an assembly hole is provided at the end of the horizontal support bracket. The radar level gauge is installed in the assembly hole and faces the inside of the tank. The assembly hole is a threaded hole. A threaded connector is provided at the lower part of the radar level gauge, and the threaded connector is fitted into the threaded hole.

[0006] Preferably, a first manual valve is installed on the feed pipe on one side of the solenoid valve, and a U-shaped branch pipe is connected to the first manual valve and the feed pipe outside the solenoid valve. The cross-sectional dimensions of the U-shaped branch pipe and the feed pipe are the same, and a second manual valve is connected to the U-shaped branch pipe. The first manual valve and the second manual valve have the same structure.

[0007] Preferably, the lower part of the side of the tank is provided with a first flow pipe and the upper part is provided with a second flow pipe. The first flow pipe and the second flow pipe are directly opposite each other, and a transparent connecting pipe is vertically connected between the first flow pipe and the second flow pipe.

[0008] Preferably, the transparent connecting tube is fitted with a scale plate, and the scale plate has an elongated hole in the middle that matches the size of the transparent connecting tube. The transparent connecting tube is fitted into the elongated hole, and the scale lines on the scale plate are aligned with the transparent connecting tube.

[0009] Preferably, the lower end of the discharge pipe is close to the bottom of the tank to ensure that the alkali solution can flow out smoothly from the discharge pipe.

[0010] Preferably, the impeller blades are located at the lower part of the tank, and three blades are evenly distributed on the impeller blades.

[0011] The beneficial technical effects of this utility model are:

[0012] (1) This utility model uses a radar level gauge at the upper port of the tank to detect the liquid level of the alkali fed into the feed pipe in real time, and an automatically controlled solenoid valve is installed on the feed pipe. The liquid level signal of the radar level gauge is sent to the solenoid valve to form a limit safety interlock of the liquid level in the tank. The automatic control realizes the transportation and storage of alkali, which can effectively avoid the safety accident caused by negligence in manual operation leading to the overflow of alkali, and ensure the safety of equipment and personnel in the workshop.

[0013] (2) This utility model forms a parallel feeding pipeline by setting a U-shaped branch pipe on the feeding pipe. When the solenoid valve or radar level gauge fails, the first manual valve can be closed and the second manual valve can be opened, so as to close the pipeline at the solenoid valve and open the U-shaped branch pipe, ensuring that the liquid alkali can be normally fed into the tank from the discharge pipe. The liquid level can be observed by the level gauge composed of the transparent connecting pipe and the scale plate, ensuring that the painting workshop can still carry out sewage treatment operations normally under special circumstances. Attached Figure Description

[0014] Figure 1 This is one of the three-dimensional structural schematic diagrams of this utility model;

[0015] Figure 2 This is a top view of the structure of this utility model;

[0016] Figure 3 yes Figure 2 A schematic diagram of the AA-direction cross-section structure;

[0017] Figure 4 yes Figure 2 Schematic diagram of the BB-direction cross-section structure;

[0018] Figure 5 This is the second three-dimensional structural schematic diagram of this utility model.

[0019] In the diagram, 1. Tank body, 11. Seat plate, 12. Cross brace, 2. Feeding pipe, 21. Discharge pipe, 31. Gear motor, 32. Main shaft, 33. Paddle, 41. Solenoid valve, 42. Radar level gauge, 43. First manual valve, 44. U-shaped branch pipe, 45. Second manual valve, 51. First flow pipe, 52. Second flow pipe, 53. Transparent connecting pipe, 54. Scale plate, 55. Scale line. Detailed Implementation

[0020] Example 1, see appendix Figure 1-2 4-5, a limit safety interlock device for reagent addition in wastewater treatment process, includes a tank 1 with a base plate 11 at the bottom, an agitator, a feed pipe 2, and a radar level gauge 42. A cross brace 12 is provided in the middle of the upper port of the tank 1, and a geared motor 31 is provided in the middle of the cross brace 12. The upper end of the main shaft 32 of the agitator is coaxially connected to the output shaft of the geared motor 31. The agitator is driven by the geared motor 31 to stir the liquid alkali in the tank 1 to solve the problem of sedimentation during the settling of liquid alkali and ensure its treatment effect on wastewater. The feed pipe 2 is horizontally connected to the cross brace 12 at the upper port of the tank body 1. The feed pipe 21 is connected to the port of the feed pipe, which is bent downward and extends vertically into the tank body 1. The liquid alkali flows vertically into the tank body 1 from the feed pipe 21. A solenoid valve 41 is installed on the feed pipe 2, and an assembly hole is provided at the end of the cross brace 12. The radar level gauge 42 is installed in the assembly hole and faces the inside of the tank body 1. The radar level gauge 42 monitors the liquid level signal and transmits it to the controller of the solenoid valve 41. The solenoid valve 41 automatically controls the opening or closing of the feed pipe 2.

[0021] The lower end of the discharge pipe 21 is close to the bottom of the tank body 1. This design is used to reduce the height difference between the outlet of the discharge pipe 21 and the bottom of the tank body 1, reduce the impact force of liquid alkali entering the tank body 1 from the discharge pipe 21, avoid the phenomenon of liquid alkali splashing out of the tank, and ensure the stability and safety of the tank body.

[0022] The impeller blade 33 is located at the lower part of the tank body 1. The impeller blade 33 has three blades evenly distributed on it. The impeller blade 33 is located at the lower part of the tank body 1 to reduce the amplitude of the disturbance of liquid alkali at the upper part of the tank body 1. This is also to avoid the phenomenon of liquid alkali splashing and to ensure the safety of liquid alkali in the tank body 1.

[0023] When the safety interlock device of this embodiment is in use, the radar level gauge 42 sends the detected liquid level signal to the solenoid valve 41 to form a limit safety interlock of the liquid level in the tank 1. When the liquid alkali in the tank 1 is lower than the predetermined minimum liquid level value, the radar level gauge 42 sends the limit liquid level signal to the solenoid valve 41. The solenoid valve opens the feed pipe to automatically deliver liquid alkali into the tank. When the liquid level reaches the predetermined maximum liquid level value, the radar level gauge 42 sends the limit liquid level signal to the solenoid valve 41. The solenoid valve 41 closes the feed pipe 2 to complete the delivery of liquid alkali into the tank 1. The delivery and storage of liquid alkali is realized through automatic control, which can effectively avoid safety accidents caused by liquid alkali overflow due to negligence in manual operation.

[0024] Example 2, see appendix Figure 1-3 This embodiment is basically the same as Embodiment 1, and the similarities will not be repeated. The difference is that: a first manual valve 43 is installed on the feeding pipe 2 on one side of the solenoid valve 41. The pipeline where the solenoid valve 41 is located is closed by the first manual valve 43. A U-shaped branch pipe 44 is connected to the feeding pipe 2 outside the first manual valve and the solenoid valve. A second manual valve 45 is connected to the U-shaped branch pipe 44. The first manual valve 43 is opened to connect the U-shaped branch pipe 44 and the feeding pipe 2. A first flow pipe 51 is provided at the lower part of the side of the tank body 1, and a second flow pipe 52 is provided at the upper part. A transparent connecting pipe 53 is vertically connected between the first flow pipe and the second flow pipe. The liquid alkali inside the tank body 1 enters the transparent connecting pipe 53 from the first flow pipe 51.

[0025] The transparent connecting tube 53 is fitted with a scale plate 54. The scale line 55 on the scale plate is aligned with the transparent connecting tube 53. The liquid level in the tank 1 can be determined by observing the scale plate 54.

[0026] In this embodiment, the U-shaped branch pipe 44 on the feeding pipe 2 forms two parallel feeding pipes. When the solenoid valve 41 or the radar level gauge 42 malfunctions, the first manual valve 43 is closed and the second manual valve 45 is opened, closing the pipeline at the solenoid valve 41 and opening the U-shaped branch pipe 44, so that the liquid alkali can be normally fed into the tank 1 from the discharge pipe 21. The liquid level is observed through the level gauge composed of the transparent connecting pipe 53 and the scale plate 54, ensuring that the painting workshop can still carry out wastewater treatment operations normally under special circumstances.

Claims

1. A limit safety interlock device for reagent addition in wastewater treatment processes, characterized in that: The device includes a tank with a base plate at the bottom, an agitator, a feed pipe, and a radar level gauge. A cross brace is located in the middle of the upper port of the tank, and a geared motor is located in the middle of the cross brace. The upper end of the main shaft of the agitator is coaxially connected to the output shaft of the geared motor. The feed pipe is horizontally connected to the cross brace at the upper port of the tank. A discharge pipe that bends downward and extends vertically into the tank is connected to the port of the feed pipe. A solenoid valve is installed on the feed pipe, and an assembly hole is provided at the end of the cross brace. The radar level gauge is installed in the assembly hole and faces the inside of the tank.

2. The limit safety interlock device for reagent addition in wastewater treatment process according to claim 1, characterized in that: A first manual valve is installed on the feed pipe on one side of the solenoid valve. A U-shaped branch pipe is connected to the first manual valve and the feed pipe outside the solenoid valve. A second manual valve is connected to the U-shaped branch pipe.

3. The limit safety interlock device for reagent addition in wastewater treatment process according to claim 1, characterized in that: The lower part of the side of the tank is provided with a first flow pipe, and the upper part is provided with a second flow pipe. A transparent connecting pipe is vertically connected between the first flow pipe and the second flow pipe.

4. The limit safety interlock device for reagent addition in wastewater treatment process according to claim 3, characterized in that: The transparent connecting tube is fitted with a scale plate, and the scale lines on the scale plate are aligned with the transparent connecting tube.

5. The limit safety interlock device for reagent addition in wastewater treatment process according to claim 1, characterized in that: The lower end of the discharge pipe is close to the bottom of the tank.

6. The limit safety interlock device for reagent addition in wastewater treatment process according to claim 1, characterized in that: The impeller blades are located at the bottom of the tank, and three blades are evenly distributed on the impeller blades.

Images