Method and device for controlling precision treatment separation tower separating tower resin separation auxiliary backwashing water incoming regulating valve

Abstract

The invention discloses a method and device for controlling a precision treatment separation tower separating tower resin separation auxiliary backwashing water incoming regulating valve. The method includes the following steps: S1, obtaining the real-time flow information of the backwashing incoming water of the separation tower and send the real-time flow information to a PLC; S2,causing the PLCto generate a regulating valve control instruction according to a preset time-dependent adjustment rule and the real-time flow information; S3, causing the regulating valve to adjust the flow of incoming water according to a received regulating valve control instruction; and S4, repeating the steps S1 to S3 until the end of the current resin separation process. The method acquires the incoming water flow information of the regenerated separation tower, sends the flow information to the PLC, introduces the flow information into the configuration logic, introduces time parameters into the resinseparation control, and performs adjustment and control according different requirements for the flows at different times, thereby realizing the closed loop control of the incoming water flow at different times, improving the accuracy of the automatic flow control and improving the separation effect of the resin.

Description

technical field [0001] The invention relates to the technical field of regulating valve control, in particular to a method and device for controlling a regulating valve for backwashing water inflow assisted by resin separation in a finishing separation tower. Background technique [0002] Datang Xiangtan Power Generation Co., Ltd. adopted the 300MW fine treatment separation auxiliary backwash inlet water regulating valve, which cannot meet the separation flow requirements for a long time during the anion and yang resin separation steps. When performing each set of mixed bed resin regeneration, Operators are required to manually adjust the flow parameters of the separation step in order to meet the maximum flow and minimum flow requirements of the separation as much as possible, and at the same time, it is also necessary to meet the trend of flow decline during the separation process. After each parameter adjustment, it cannot continue to be used in the next regeneration and ...

AI Technical Summary

Problems solved by technology

[0002] Datang Xiangtan Power Generation Co., Ltd. adopted the 300MW fine treatment separation auxiliary backwash inlet water regulating valve, which cannot meet the separation flow requirements for a long time during the anion and yang resin separation steps. When performing each set of mixed bed resin regeneration, Operators are required to manually adjust the flow parameters of the separation step in order to meet the maximum flow and minimum flow requirements of the separation as much as possible, and at the same time, it is also necessary to meet the flow rate drop trend requirements during the separation process

After each parameter adjustment, it cannot continue to be used in the next regeneration and separation process, but needs to be adjusted again according to the actual situation

[0003] Under the existing control mode, since the flow control is completely based on the manual adjustment of the valve opening by the operator, and there is no flow display on the operation screen, it is necessary to go to the production site to watch it on the spot, so it is impossible to achieve real-time and accurate control of the flow, resulting in The resin separation effect is not ideal, and the expected effect can only be achieved by repeating the regeneration steps, which consumes a large amount of demineralized water, increases the acid and alkali consumption, increases the cost of consumable materials, increases the power, and increases the number of control personnel and operating personnel workload

Images