Lithium bromide absorption cold-warm water unit-double-effect machine high-generation level control method and device

Abstract

Present invention discloses a lithium bromide absorption type cold-warm water assembly-double effect unit high transmission liquid level control method and device. It contains plurality of liquid level sensors, high transmission temperature sensor, liquid level controllerú¼ programmable logic controller PLC, long-distance temperature module, PLC primary station module, solution pump frequency converter. Said invention adopts advanced programmable logic controller PLC information processing technology information processing technology and converter technique with accuracy controlling, high intellectualization, small liquid level undulation, steady operation of the unit, to raise whole set quality and technical performance.

Description

Technical field: [0001] The invention relates to an information control system of a lithium bromide absorption type cooling and warming water unit, in particular to a lithium bromide absorption type cooling and warming water unit—a method and device for controlling the high liquid level of a double-effect machine. Background technique: [0002] The liquid level control of the double-effect machine of the original lithium bromide absorption chiller and warm water unit adopts less liquid level sensors, simple liquid level controller, solution regulating valve and switch circuit control. The liquid level controller judges the position of the liquid level through the liquid level sensor, and controls the start and stop of the solution pump and the switch of the solution regulating valve. In the case of rapid changes in the solution flow, the liquid level fluctuates greatly, and it is difficult for the sensor or controller to adapt, which makes the generator liquid level out of c...

AI Technical Summary

Problems solved by technology

[0003] The technical problem to be solved by the present invention is: to solve the problem that the original lithium bromide absorption type cooling and warming water unit has a high-intensity liquid level control of the original double-effect machine, and the solution pump only has two states of full load operation or stop and valve control, which is easy to cause liquid level failure. Sudden rise and fall, increased liquid level fluctuations, unstable operation of the unit, and even damage to the plate heat exchanger of the unit, affecting the technical performance of the whole machine; and provide an intelligent control, high precision, stable solution changes, high frequency Lithium Bromide Absorption Type Cooling and Warming Water Unit with Little Liquid Level Fluctuation, Favorable Protection of Plate Heat Exchanger, Stable Unit Operation, Power Saving and Energy Saving, and Improved Technical Performance and Quality of the Whole Machine——Double-effect Machine High Incidence Liquid Level Control Method and Device

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