Flash liquid level automatic control device
A liquid level automatic control and liquid level control technology, which is applied in the direction of liquid level control, non-electric variable control, control/regulation system, etc., can solve the problems of frequent liquid level fluctuations, high investment costs, and poor stability of liquid level control
Inactive Publication Date: 2014-01-01
HUANGHE S & T COLLEGE
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Problems solved by technology
However, on the one hand, this liquid level interlocking self-control method has high investment costs, and on the other hand, it is subject to the stability of the liquid level gauge and pressure regulating valve, which is easy to cause the automatic liquid level of the flasher when the liquid level detection is inaccurate and the adjustment fails. The control device is empty or full, so that the liquid level fluctuates frequently within a certain range, and the stability of liquid level control is poor
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[0011] The embodiment of flash evaporator liquid level automatic control device of the present invention: as figure 1 As shown, the flash evaporator liquid level automatic control device is suitable for utilizing high-temperature and high-pressure condensed water discharged from heat exchange equipment in the technical fields such as chemical industry, metallurgy, and petroleum. The control device, while the liquid level automatic control device is composed of a drainage tube 4, a differential pressure liquid level control valve 5 and an air pressure conduction tube 6. Wherein the drainage pipe 4 is composed of a vertically inclined standpipe section, a horizontally arranged flat pipe section, an elbow section transitionally connected between the standpipe section and the flat pipe section, and the standpipe section is assembled in the flash tank body 1, so that the vertical pipe section The nozzle at the lower end is the entrance of the drainage pipe 4 inserted into the flash...
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The invention discloses a flash vessel liquid level automatic control device which comprises a liquid level automatic control device comprising a differential pressure liquid level control valve. The differential pressure liquid level control valve comprises a control opening communicated with a top gas chamber of a flash tank through an air pressure transmission pipe and a liquid inlet formed in a height position, corresponding to the set liquid level, of the flash tank. When the liquid level in the flash tank is not higher than the liquid inlet of the differential pressure liquid level control valve, the differential pressure liquid level control valve is in a closed state, and an outlet of a drain pipe is sealed. When the liquid level in the flash tank is higher than the liquid inlet of the differential pressure liquid level control valve, the differential pressure liquid level control valve is opened, and liquid in the flash tank is drained from the drain pipe to a downstream pipeline. When the liquid level returns to be equal to the liquid inlet of the differential pressure liquid level control valve in height, the differential pressure liquid level control valve is closed, so that the liquid level in the flash tank is maintained in a position corresponding to the liquid inlet of the differential pressure liquid level control valve, and the purpose of stably and reliably regulating the liquid level in the flash tank is achieved.
Description
technical field [0001] The invention relates to an automatic control device for liquid level of a flash evaporator. Background technique [0002] At present, in the chemical industry, metallurgy and other industries, the condensed water discharged from the heater contains a lot of heat due to its high temperature, so it needs to enter the flash evaporator liquid level automatic control device for flash evaporation, and the flash evaporated secondary steam enters a suitable place for use , making full use of the heat energy of high-temperature condensed water, the traditional flash evaporator liquid level automatic control device uses a liquid level gauge to detect the liquid level, and the regulating valve controls the outlet water flow to control the liquid level in the flash evaporator liquid level automatic control device, and the liquid level gauge will be based on the Measure the height of the liquid level to control the switching action of the regulating valve, so that...
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Inventor 李慧普海宝张文广胡瑞华张军
Owner HUANGHE S & T COLLEGE