A liquid level control method of a salt water storage device
A liquid level control and storage device technology, applied in the direction of liquid level control, non-electric variable control, control/regulation system, etc., can solve problems such as pump idling, and achieve the effect of no cost investment and reduced maintenance investment
Active Publication Date: 2015-11-11
HUAIAN WAN BANG SPICE IND CO LTD +1
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Problems solved by technology
[0003] The technical problem to be solved by the present invention is to provide a method for controlling the liquid level of a salt water storage device, which can solve the problem in the prior art that the pump is used to control the liquid level of a salt water storage device when the pump is idling at low temperatures
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[0019] Based on the "SUPCONJX-300XP" DCS distributed control system of Zhejiang Zheda Zhongkong Technology Co., Ltd., the high and low limit liquid level L of the brine storage device max and L min The switch value input card XP361 collects data from the high and low limit liquid level switches respectively, and the real-time liquid level L 实 The analog input card XP313 collects data from the remote liquid level gauge, and the data is transmitted to the main control card XP243 for logical operation; the AC contactor of the motor is controlled by the intermediate relays A and B in series. When the program is running, the main control card XP243 passes The switching value output card XP362 sends an initial value of 1 and a period of (T 1 +T 0 ), the duty cycle is T 1 / (T 1 +T 0 ) to the intermediate relay A, the main control card XP243 sends an uninterrupted running signal to the intermediate relay B through the switch output card XP362; When A is disconnected and intermed...
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The invention discloses a liquid level control method of a saline water storage device. The liquid level control method of the saline water storage device includes the following steps: arranging a pump to be in a stop state; detecting if real-time liquid level L in the saline water storage device is greater than and equal to an upper limit value of the liquid level; if the detesting result is yes, clearing cycle index and real time; arranging the pump into a running state; testing if the conditions are met: real time is greater than and equal to running time of the pump, or the real liquid level is smaller than and equal to a liquid level lower limit valve, or the real time is greater than and equal to total time of drainage; if the detecting result is yes, arranging the pump to be in a standby state; detecting if the real time is greater than and equal to the standby time of the pump; if the detecting result is yes, detecting if the conditions are met: the real time is greater than and equal to the total time of drainage, or the real-time liquid level is smaller than and equal to the lower limit value, if the detecting result is no, arranging the value of cycle index to plus one, and then returning the arranged pump into a running state; and if the detecting result is yes, the program is over.
Description
technical field [0001] The invention relates to the field of industrial control, in particular to a liquid level control method. Background technique [0002] The solubility of a fixed substance refers to the mass that a fixed substance can dissolve in a saturated state of 100 grams of solvent at a certain temperature. This value will change with the change of temperature; In some cases, salt crystals are precipitated due to the decrease in the solubility of salt. As the salt crystals accumulate more and more, when the pump is used to adjust the liquid level of the storage device containing salt water, the salt crystals will be in the suction nozzle of the pump. A ring-shaped dam is formed around it, and the amount of salt water entering the suction pipe of the pump through the ring-shaped dam will become less and less, and eventually the pump will run idly, the failure rate will increase greatly, and the manpower and material resources input for maintenance will be very hig...
Claims
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IPC IPC(8): G05D9/12
Inventor 刘龙厚
Owner HUAIAN WAN BANG SPICE IND CO LTD