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

Radioactive waste liquid evaporator liquid level control system and method

A technology of radioactive waste liquid and liquid level control, applied in the direction of evaporator regulation/control, liquid level control, control/regulation system, etc., can solve the problem of interference, can not provide accurate output immediately, correct time lag, take a long time and other problems, to ensure the purification quality and evaporation efficiency, reduce disturbance, and improve the effect of hysteresis.

Pending Publication Date: 2021-10-29
NUCLEAR POWER INSTITUTE OF CHINA
View PDF0 Cites 3 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0009] The technical problem to be solved by the present invention is that the correction action time lag of the existing single liquid level variable control system, and cannot immediately provide accurate output for a certain amplitude of interference, and with the increase of the interference frequency, its disadvantage of poor anti-interference ability It is obvious that it takes a long time to realize the adjustment and stability. The purpose of the present invention is to provide a liquid level control system and method for radioactive waste liquid evaporator to solve the above problems

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
  • Radioactive waste liquid evaporator liquid level control system and method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0051] A liquid level control system for a radioactive waste liquid evaporator, comprising: a liquid level main control loop, a liquid level feedforward control loop, and a feeding flow control loop;

[0052] The feed flow control loop feeds the preheater with a fixed flow rate;

[0053] After the disturbance causes the liquid level in the evaporator to change, the liquid level main control loop adjusts the fixed value flow rate of the preheater and the amount of saturated steam injected into the evaporator to restore the liquid level;

[0054] The liquid level feedforward control loop introduces the secondary steam flow after the gas-liquid separation of the evaporator into the main liquid level control loop as an interference quantity.

[0055] Disturbances that cause changes in the liquid level of the evaporator include: disturbances caused by the control system and disturbances caused by disturbance quantities.

[0056] The disturbances caused by the system include: distu...

Embodiment 2

[0073] This embodiment provides a liquid level control method for a radioactive waste liquid evaporator, which is applied to the liquid level control system for a radioactive waste liquid evaporator in the previous embodiment, and feeds materials at a constant flow rate to the preheater through the feeding flow control loop;

[0074] After the disturbance causes the liquid level in the evaporator to change, adjust the fixed value flow rate of the preheater and the amount of saturated steam injected into the evaporator through the liquid level main control circuit to restore the liquid level;

[0075] The liquid level feedforward control loop introduces the secondary steam flow after the gas-liquid separation of the evaporator into the main liquid level control loop as an interference quantity.

[0076] Process flow of the evaporator: The radioactive waste liquid is sent to the preheater 4 for preheating through the feeding valve 1, and enters the evaporator 5 after reaching the...

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

The invention discloses a radioactive waste liquid evaporator liquid level control system and method. The radioactive waste liquid evaporator liquid level control system comprises a liquid level main control loop, a liquid level feedforward control loop and a feeding flow control loop. The feeding flow control loop is used for carrying out constant-value flow feeding on the preheater; after the liquid level in the evaporator is changed due to disturbance, the liquid level main control loop adjusts the feeding constant value flow of the preheater and the amount of saturated steam injected into the evaporator so as to recover the liquid level; the liquid level feed-forward control loop introduces secondary steam flow after gas-liquid separation of the evaporator into the liquid level main control loop as disturbance variable; and a safe, reliable and efficient adjusting system with evaporator liquid level control as the center and a liquid level feedforward control loop and a feeding flow control loop as the auxiliary is adopted, so that the anti-interference capacity of the control system is improved, the high stability of the evaporator liquid level is achieved, the purification quality and evaporation efficiency of secondary steam are guaranteed, and the process safety of evaporator equipment is improved.

Description

technical field [0001] The invention relates to the technical field of liquid level control of evaporators, in particular to a liquid level control system and method for radioactive waste liquid evaporators. Background technique [0002] The radioactive waste liquid of nuclear power plants can be roughly divided into three categories: ①The low-conductivity waste liquid mainly comes from the technological process, which is mainly treated by ion exchange; ②The high-conductivity waste liquid mainly comes from decontamination, floor washing and resin regeneration, which is mainly used Evaporation and chemical precipitation treatment; ③Laundry and shower water are mainly treated by adsorption or precipitation. [0003] There are more and more radioactive waste liquids produced by nuclear power plants and nuclear facilities in my country. The main removal objects of radioactive waste liquids are radioactive heavy metal elements. Since the decay cycle of radioactive elements cannot...

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): G05D9/12C02F1/04B01D1/00
CPCG05D9/12C02F1/04B01D1/0082C02F2101/006
Inventor 杨兰菊章航洲李文钰陈莉李振臣林力莫华均梁毅马贞钦冉洺东骆枫傅源杰刘辰龙张家衡周春燕
Owner NUCLEAR POWER INSTITUTE OF CHINA
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

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic, Popular Technical Reports.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com