Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

Polynary control system for adding drugs automatically

An automatic dosing and control system technology, which is applied to mixers, mixer accessories, sedimentation and separation, etc., can solve the problems of insufficient accuracy, waste of medicines, and low work efficiency, so as to achieve accurate dosing of medicines and save the cost of medicines Increase and save running cost

Inactive Publication Date: 2007-05-09
上海立源水处理科技发展有限公司
View PDF0 Cites 20 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] 1. The SCD streaming current method in the traditional automatic dosing system is not perfect in theory due to the water quality components that determine the amount of dosing, such as raw water turbidity, temperature, pH, pollution factors and non-colloid particle interference factors. SCD has a great influence, but in the SCD feedback adjustment method, only the parameter ζ potential reflecting the colloidal stability in water is used to represent all water quality factors, so this control method does not fully conform to the actual production
[0004] 2 At the same time, the small gap of the sensor is easy to cause blockage, and it is not easy to form flocs after dosing. In particular, the hysteresis reaction and water quality changes have a greater impact on SCD, resulting in poor adaptability of the method, insufficient accuracy, and optimization of automatic dosing. requirements, and the addition of organic anionic polymer flocculants is uncontrollable
In some systems, although intelligent technologies such as expert systems, self-learning fuzzy control and other methods have been used to achieve certain results, the problem of optimal control of dosing volume has not been completely solved.
[0005] 3. Due to the large time delay of the water treatment system, the simulated sedimentation tank method cannot quickly respond to the change of dosing amount, and it is difficult to establish a control model that adapts to the change of water quality. At the same time, when combined with process equipment, the control deviation is large and the accuracy is poor
[0006] 4 The current dosing control system has poor adaptability to chemicals, does not fully consider the characteristics of chemicals, cannot be perfectly combined with process equipment, and cannot be used for pre-water conditioning control and auxiliary dosing control of coagulant aids. For special water quality (such as Low temperature, low turbidity, etc.) There is no way to control the dosing
[0007] 5. At present, the automatic dosing equipment used in actual projects has low working efficiency, serious waste of medicines, and failed to achieve the best dosing control of medicines. It is difficult to adapt to the operation of projects with large changes in water volume. When the water volume changes greatly, Changing the dosage changes the hysteresis
[0008] It is difficult for the traditional dosing system to realize the real-time detection of the treatment effect of the system. When the result after treatment fluctuates within a certain range, it is difficult to fine-tune the dosing amount of each dosing system, which causes a large waste of various chemicals

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Polynary control system for adding drugs automatically
  • Polynary control system for adding drugs automatically
  • Polynary control system for adding drugs automatically

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0053] Establish a mathematical control model according to the role of water quality parameters in the control system:

[0054] 1. The standard 4-20mA current signal output by the online PH meter is sent to the central processing equipment. If the water treatment process has a conditioning function, the central processing equipment outputs a 0-10V or 4-20mA signal to control the frequency conversion dosage of the conditioning agent add. If the process equipment has no conditioning function, the 4-20mA signal of the pH meter will participate in the dosage control of the coagulant.

[0055] 2. According to the parameters collected by the raw water turbidity meter, COD, PH meter, temperature and other online instruments and the standard 4-20mA signal input to the central processing equipment, through the mathematical model calculation of the central processing equipment (using neural network, fitting, self-adaptive ) Determine the unit consumption of the dosing amount, collect a...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

Abstract

A multi-element automatic chemical-adding control system for treating water features that the temp, turbidity and flow of raw water are acquired by various meters and then transmitted to central controller, where a mathematic model is used to calculate out control signals for controlling a chemical adding system.

Description

technical field [0001] The invention belongs to the technical field of water treatment, and in particular relates to a dosing equipment system applied in a water treatment process. Background technique [0002] At present, the automatic control system of water treatment chemicals is still focused on the automatic dosing control of coagulant. The main control methods are: simulated sedimentation tank method and flowing current method. There are the following shortcomings and difficult problems in the actual engineering operation: [0003] 1. The SCD streaming current method in the traditional automatic dosing system is not perfect in theory due to the water quality components that determine the amount of dosing, such as raw water turbidity, temperature, pH, pollution factors and non-colloid particle interference factors. SCD has a great influence, but in the SCD feedback adjustment method, only the parameter ζ potential reflecting the colloidal stability in water is used to ...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Applications(China)
IPC IPC(8): B01F15/04B01D21/01C02F1/52
Inventor 徐立群胡明涛徐宏伟朱辉
Owner 上海立源水处理科技发展有限公司
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products