A water level control device for multiple deaerators running in parallel
A technology for operating water level and control devices, applied in the direction of liquid level control, electric controller, control/adjustment system, etc., can solve the problems affecting the automation level of the unit and the difficulty of controlling and adjusting the water level of the deaerator.
Active Publication Date: 2021-03-02
GUODIAN SCI & TECH RES INST
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Problems solved by technology
[0003] At present, the multiple deaerator systems of the parent control unit are operated in parallel. The water level control of each deaerator interacts with each other and the adjustment is very difficult. Manual operation is often used for frequent operations, which seriously affects the automation level of the unit.
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[0029] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some, not all, embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.
[0030] see figure 1 A schematic structural diagram of a water level control device for parallel operation of multiple deaerators disclosed by an embodiment of the present invention is shown.
[0031] Depend on figure 1 It can be seen that the device includes: a first PID signal output circuit 1 , a second PID analog signal output circuit 2 , and a switching circuit 3 .
[0032] Among them, the first PID signal output circuit 1 is used to output the first PID...
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The application discloses a water level control device for parallel operation of multiple deaerators. The device mainly includes a first PID signal output loop and a second PID signal output loop. Among them, when the load of the main control unit is higher than the preset load, the first PID signal output circuit outputs the first PID analog signal based on the three impulses of multiple deaerators; when the load of the main control unit is lower than the preset load, The second PID signal output circuit outputs a second PID analog signal based on the difference between the average water level of the multiple deaerators and the preset water level threshold, so as to control the opening degrees of the water level valves of the multiple deaerators. Compared with the prior art, this application can realize the joint automatic adjustment of the overall water level for multiple deaerators in the main pipe, without manual operation by operators, which improves the automation level of the unit.
Description
technical field [0001] This application relates to the control field of parent control units, and more specifically, relates to a water level control device for parallel operation of multiple deaerators. Background technique [0002] The deaerators of the main control unit are connected with each other by the balanced main pipes on the water side of each single deaerator, which makes the water level prone to large deviations. Therefore, the water level of the thermal deaerator is the main control parameter that affects the qualified deaeration water quality and the safe operation of the deaeration water supply system. Strengthening the control of the deaerator water level to ensure the stability of the water level is the key to ensure the stable operation of the deaeration water supply system. [0003] At present, the multiple deaerator systems of the parent control unit are operated in parallel. The water level control of each deaerator interacts with each other and the adj...
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IPC IPC(8): G05D9/12G05B11/42
CPCG05B11/42G05D9/12
Inventor 鲁晓莽吴炬马铭宏
Owner GUODIAN SCI & TECH RES INST