Automatic feeding device for acid-base neutralization in sewage treatment station
By designing automatic feeding devices in sewage treatment stations and using DCS control system and electric regulating valves to achieve automatic feeding of acid and alkali, the problem of low automation level in the existing technology is solved, the delivery accuracy and safety are improved, and manpower is reduced. Maintenance cost.
Patent Information
- Application Number
- CN202420768326.8
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-04-15
- Publication Date
- 2024-12-10
- Estimated Expiration
- 2034-04-15
AI Technical Summary
In the prior art, the automation level of feeding methods of acidic hazardous waste liquids and alkaline hazardous waste liquids is low, requires manual operation, and the volatile gases cause harm to the human body, and lack effective automated control.
An automatic feeding device was designed, using an electronic pH value counter feedback signal to the DCS control system, and automatic feeding of waste acid and waste alkali is realized through an electric regulating valve to ensure that the pH value of the liquid in the regulating tank is between 7 and 8. Acid-resistant and alkali-resistant materials and sealed pipelines to reduce manual intervention.
It improves the automation level of the factory, realizes high-precision liquid material delivery, reduces labor costs and maintenance costs, enhances the safety of the working environment, reduces cumbersome processes, and improves production efficiency and safety.
Smart Images
Figure CN222138818U_ABST
Abstract
Description
Technical Field
[0001] The utility model belongs to the technical field of waste acid and waste alkali neutralization, and in particular relates to an automatic feeding device for acid and alkali neutralization in a sewage treatment station. Background Art
[0002] The acid-base neutralization utilization of hazardous waste is to neutralize the acidic hazardous waste liquid and the alkaline hazardous waste liquid in the regulating tank to form a neutral solution. The neutral solution enters the sewage station and is reused after being treated by the sewage station. Because acidic hazardous waste liquid and alkaline hazardous waste liquid are highly corrosive, the existing manual feeding method and the separate feeding method using waste acid and waste alkali feeding equipment have low automation levels and limited feeding speeds. They require manual operation or manual assisted operation, and the volatilized gases during the operation are inevitably harmful to the human body. In order to meet production needs, a new device that does not require manual operation and is more efficient and convenient needs to be proposed. Utility Model Content
[0003] The purpose of the utility model is to solve the shortcomings of the prior art and propose an automatic feeding device for acid-base neutralization in a regulating tank of a sewage treatment station. The automatic feeding device for acid-base neutralization of hazardous wastes of the utility model is a device that feeds back signals of waste acid and waste alkali in waste acid and waste alkali storage tanks to a DCS control system through an electronic pH value indicator, and the DCS control system then forms a signal interlock with an electric regulating valve to control the electric regulating valve to automatically feed waste acid or waste alkali.
[0004] In order to achieve the above purpose, the utility model adopts the following technical solutions:
[0005] The invention discloses an automatic feeding device for acid-base neutralization in a sewage treatment station, which comprises a waste acid storage tank, a waste alkali storage tank, a DCS control system, a waste acid electric regulating valve, a waste alkali electric regulating valve, a waste acid feeding pipeline, a waste alkali feeding pipeline, a waste acid feeding pump, a waste alkali feeding pump, a pH value remote measuring instrument and a regulating tank; the waste acid storage tank is connected with the waste acid feeding pump, the waste acid electric regulating valve and the regulating tank in sequence through the waste acid feeding pipeline; the waste alkali storage tank is connected with the waste alkali feeding pump, the waste alkali electric regulating valve and the regulating tank in sequence through the waste alkali feeding pipeline; the waste acid electric regulating valve, the waste alkali electric regulating valve and the pH value remote measuring instrument are connected with the DCS control system through electrical signals, the pH value remote measuring instrument measures the pH value of liquid in the regulating tank, and returns the measured first signal to the DCS control system for connection, and then the DCS control system controls the opening and closing state or the opening size of the waste acid electric regulating valve and the waste alkali electric regulating valve according to the size of the first signal, thereby controlling the pH value of the liquid in the regulating tank.
[0006] The connections between the waste acid feeding pipeline and the waste alkali feeding pipeline and the various components are completely sealed, and the pipeline material should be made of acid and alkali resistant materials, including but not limited to polytetrafluoroethylene, 316L, etc.
[0007] The regulating tank is a sewage regulating tank of a sewage treatment station. Waste acid and waste alkali are neutralized in the regulating tank and then enter the sewage treatment equipment for treatment. The regulating tank can also be replaced by other containers, such as storage tanks.
[0008] The feeding pump is mainly used for conveying waste acid and waste alkali. The parts of the pump lining that contact the waste acid and waste alkali should be made of acid-resistant and alkali-resistant materials, including but not limited to polytetrafluoroethylene, 316L, etc.
[0009] The waste acid storage tank, waste alkali storage tank and regulating tank are made of storage tanks resistant to strong acid and strong alkali, including but not limited to polytetrafluoroethylene, glass fiber reinforced plastic, 316L, etc.
[0010] Furthermore, the parts of the inner linings of the waste acid feeding pump and the waste alkali feeding pump that contact the waste acid and alkali are made of polytetrafluoroethylene or 316L, and the materials of the waste acid storage tank, waste alkali storage tank and regulating tank are polytetrafluoroethylene, glass fiber reinforced plastic or 316L.
[0011] Compared with the prior art, the beneficial effects of the utility model are:
[0012] In the utility model, the DCS controller can be used to automatically control the feeding of waste acid and waste alkali, thereby solving the problem that traditional liquid feeding is purely implemented manually and lacks control over the factory's material data, personnel safety, etc., improves the factory's automation level, and can achieve high-precision liquid material feeding with high control accuracy without manual intervention.
[0013] In the utility model, the degree of automation is high, which can reduce labor costs and maintenance costs, the equipment can save consumables and reduce floor space, and the closed feeding system can improve the safety of the working environment and reduce cumbersome processes. In summary, the utility model can feed waste acid and waste alkali in an automated manner, which can not only improve production efficiency, but also save manpower and material resources. BRIEF DESCRIPTION OF THE DRAWINGS
[0014] Figure 1 It is a schematic diagram of the structure of the utility model;
[0015] The names of the parts in the figure are: waste acid storage tank 1, waste alkali storage tank 2, waste acid electric regulating valve 3-1, waste alkali electric regulating valve 3-2, DCS control system 4, waste acid feeding pump 5, waste alkali feeding pump 6, waste acid feeding pipeline 7, waste alkali feeding pipeline 8, pH remote measuring instrument 9, electrical signal 10, regulating tank 11. DETAILED DESCRIPTION
[0016] Example 1
[0017] The embodiments of the present invention are described in detail below. The embodiments described with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and cannot be understood as limiting the present invention.
[0018] Reference Figure 1 The utility model provides a feeding device for acid-base neutralization of hazardous wastes, including a waste acid storage tank 1, a waste alkali storage tank 2, a waste acid electric regulating valve 3-1, a waste alkali electric regulating valve 3-2 (the waste acid and alkali electric regulating valves can adopt commercially available electric ball valves), a DCS control system 4, a waste acid feeding pump 5, a waste alkali feeding pump 6 (the waste acid and alkali feeding pumps can adopt acid-resistant and alkali-resistant metering pumps, vertical centrifugal pumps, and horizontal centrifugal pumps), a waste acid feeding pipeline 7, a waste alkali feeding pipeline 8, a pH value remote transmission tester 9 (adopting an industrial pH measuring instrument with a transmitter), an electrical signal 10, and a regulating tank 11.
[0019] Waste acid and waste alkali are added to waste acid storage tank 1 and waste alkali storage tank 2 respectively, and pH value remote transmission measuring instrument 9, waste acid electric regulating valve 3-1 and waste alkali electric regulating valve 3-2 are respectively connected to DCS control system 4 through electric signal 10. The measuring probe of pH value remote transmission measuring instrument 9 is put into regulating tank 11 to measure the pH value of the liquid in regulating tank 11, and pH value remote transmission measuring instrument 9 transmits the measured pH value to DCS control system 4 through current signal, and the transmitted current signal is called first signal. The DCS control system 4 generates a second signal and a third signal for adjusting the switch state (open state, closed state or opening size) of the waste acid electric regulating valve 3-1 and the waste alkali electric regulating valve 3-2 according to the value of the first signal transmitted by the pH value remote measuring instrument 9; when the pH value is greater than 8, the DCS control system 4 transmits the generated second signal to the waste acid electric regulating valve 3-1 and the waste alkali electric regulating valve 3-2 according to the first signal, and the waste acid electric regulating valve 3-1 is controlled to be in an open state by the second signal, and the waste alkali electric regulating valve 3-2 is controlled to be in a closed state by the third signal; when the pH value is less than 7, the switch states of the waste acid feeding pipeline 7 and the waste alkali feeding pipeline 8 are opposite; when the pH value is between 7 and 8, the DCS control system 4 defaults that the waste acid electric regulating valve 3-1 and the waste alkali electric regulating valve 3-2 are both in an open state.
[0020] In some embodiments of the utility model, when the pH value is different, the current of the first signal transmitted by the pH remote measuring instrument is different (the current is between 4 and 20mA). When the pH value is smaller, the current of the first signal is weaker, and the input current is closer to 4mA; when the pH value is larger, the current of the first signal is stronger, and the input current is closer to 20mA. The second signal and the third signal generated by the DCS are also related to the pH value. When the liquid in the regulating tank is alkaline and the pH value is larger, the current input to the waste acid electric regulating valve 3-1 by the second signal is larger. When the pH value is equal to 10, this current reaches a maximum of 20mA, and the waste acid electric regulating valve 3-1 is in a fully open state. On the contrary, when the water in the regulating tank is acidic and the pH value is smaller, the current input to the waste alkali electric regulating valve 3-2 by the third signal is larger. When the pH value is equal to 4, this current reaches a maximum of 20mA, and the waste alkali electric regulating valve 3-2 is in a fully open state.
[0021] In some embodiments of the utility model, waste acid and waste alkali enter the regulating tank 11 through the waste acid electric regulating valve 3-1 and the waste alkali electric regulating valve 3-2 on the feed pipeline. After the waste acid and waste alkali enter the regulating tank 11, the pH value begins to change. The pH remote measuring instrument 9 will generate a first signal in real time according to the change of the pH value and feed it back to the DCS control system 4; the DCS control system 4 sends a second control instruction (i.e., the second signal and the third signal) to the electric regulating valve according to the received first signal; and so on, until the pH value of the regulating tank 11 is between 7 and 8, the DCS control system 4 sends a control instruction to the electric regulating valve, so that the waste acid electric regulating valve 3-1 and the waste alkali regulating valve 3-2 are both in the open state.
[0022] This embodiment solves the problem that traditional liquid feeding is purely manual and lacks control over the factory's material data, personnel safety, etc., improves the factory's automation level, and can achieve high-precision liquid material feeding with high control accuracy without manual intervention.
Claims
1. An automatic feeding device for acid-base neutralization in a sewage treatment station, Features: The invention comprises a waste acid storage tank (1), a waste alkali storage tank (2), a DCS control system (4), a waste acid electric regulating valve (3-1), a waste alkali electric regulating valve (3-2), a waste acid feeding pipeline (7), a waste alkali feeding pipeline (8), a waste acid feeding pump (5), a waste alkali feeding pump (6), a pH value remote transmission measuring instrument (9), and a regulating tank (11); the waste acid storage tank (1) is connected to the waste acid feeding pump (5), the waste acid electric regulating valve (3-1), and the regulating tank (11) in sequence through the waste acid feeding pipeline (7); the waste alkali storage tank (2) is connected to the waste alkali feeding pump (6), the waste alkali electric regulating valve (3-2) in sequence through the waste alkali feeding pipeline (8) The waste acid electric regulating valve (3-1), the waste alkali electric regulating valve (3-2), and the regulating tank (11) are connected; the waste acid electric regulating valve (3-1), the waste alkali electric regulating valve (3-2), and the pH value remote measuring instrument (9) are connected to the DCS control system (4) through an electrical signal (10); the pH value remote measuring instrument (9) measures the pH of the liquid in the regulating tank (11), and returns the measured first signal to the DCS control system (4), and then the DCS control system (4) controls the opening, closing state or opening size of the waste acid electric regulating valve (3-1) and the waste alkali electric regulating valve (3-2) according to the size of the first signal, thereby controlling the pH value of the liquid in the regulating tank (11).
2. An automatic feeding device for acid-base neutralization in a sewage treatment station as claimed in claim 1, Features: The waste acid feed pipeline (7), the waste alkali feed pipeline (8), the waste acid feed pump (5) and the waste alkali feed pump (6), the inner linings of the waste acid and waste alkali storage tank (1), the waste alkali storage tank (2) and the regulating tank (11) are made of acid and alkali resistant materials.
3. An automatic feeding device for acid-base neutralization in a sewage treatment station as claimed in claim 2, Features: The waste acid feeding pipeline (7) and the waste alkali feeding pipeline (8) are made of polytetrafluoroethylene or 316L.
4. An automatic feeding device for acid-base neutralization in a sewage treatment station as claimed in claim 2, Features: The inner linings of the waste acid feed pump (5) and the waste alkali feed pump (6) in contact with the waste acid and waste alkali are made of polytetrafluoroethylene or 316L material.
5. The automatic feeding device for acid-base neutralization in a sewage treatment station as claimed in claim 2, Features: The materials of the waste acid storage tank (1), the waste alkali storage tank (2) and the regulating tank (11) are polytetrafluoroethylene, glass fiber reinforced plastic or 316L.
6. The automatic feeding device for acid-base neutralization in a sewage treatment station as claimed in claim 1, Features: The waste acid electric regulating valve (3-1) and the waste alkali electric regulating valve (3-2) are electric ball valves.
7. An automatic feeding device for acid-base neutralization in a sewage treatment station as claimed in claim 1, Features: The waste acid feed pump (5) and the waste alkali feed pump (6) are acid-resistant and alkali-resistant metering pumps, vertical centrifugal pumps or horizontal centrifugal pumps.