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A liquid level control system for a synthesis gas scrubber and its control method

A technology of liquid level control and liquid level controller, which is applied in the direction of liquid level control, control/regulation system, non-electric variable control, etc., can solve the problems such as pressure difference that cannot be solved, and achieve reduced operating costs, high commissioning rate, The effect of reducing the working pressure difference

Active Publication Date: 2017-11-28
SINOPEC NINGBO ENG +2
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Problems solved by technology

But this control doesn't solve the differential pressure problem

Method used

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  • A liquid level control system for a synthesis gas scrubber and its control method

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Embodiment Construction

[0025] The present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments.

[0026] Such as figure 1 As shown, the liquid level control system of the syngas scrubber in this embodiment includes a liquid level transmitter 2, a liquid level calculation module 3, a liquid level indicating module 8, a first liquid level regulating valve 4, a first liquid level control Device 6, second liquid level regulating valve 5, second liquid level controller 7, pressure transmitter 91 and pressure indicating module 92.

[0027] Wherein the liquid level transmitter 2 comprises the first liquid level transmitter 21, the second liquid level transmitter 22 and the third liquid level transmitter 23 connected on the washing tower 1, the first liquid level transmitter 21 , the second liquid level transmitter 22 and the third liquid level transmitter 23 are respectively connected with the liquid level calculation module 3, and when working,...

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Abstract

The invention relates to a liquid level control system of a syngas scrubber, comprising a liquid level transmitter, a liquid level calculation module, a liquid level indication module, a first liquid level regulating valve, a first liquid level controller, and a second liquid level regulator valve, second level controller. The invention also relates to a control method for the liquid level control system of the syngas scrubber, which realizes the interlock switching between the first liquid level regulating valve and the second liquid level regulating valve under different pressure conditions, thereby greatly reducing the The working pressure difference of the first liquid level regulating valve eliminates the cavitation phenomenon in the working process. At the same time, the liquid level automatic control of the synthesis gas scrubber liquid level control system has a high commissioning rate, which effectively improves the stability and reliability of the liquid level control of the scrubber, reduces unplanned shutdown of the device, convenient operation, low operating cost, and maintenance workload Small.

Description

technical field [0001] The invention relates to a liquid level control system of a synthesis gas scrubber, and also relates to a control method for the liquid level of a synthesis gas scrubber. Background technique [0002] The scrubber is a process device used to remove solid particles entrained in the crude synthesis gas. Usually, the crude synthesis gas produced by the gasifier is sent to the scrubber to be washed and then sent to the downstream process device. The washing water discharged from the side is pressurized by the quenching water pump and sent to the quenching chamber of the gasifier as quenching water, and the black water discharged from the bottom of the washing tower is sent to the flash tank for further treatment and reuse. During the operation of the washing tower, the liquid level of the washing tower is kept stable by continuously adding process water. If the liquid level of the scrubber is too low, the quenching water pump will not be able to operate, ...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G05D9/12
Inventor 刘建兵严春明尹晓晖王同尧王令光汉建德阎红钟彦达
Owner SINOPEC NINGBO ENG
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