Control method of air separation plant
A technology of air separation and control method, which is applied in the direction of cold treatment separation, refrigeration and liquefaction, solidification, etc., and can solve the problems of multi-energy, consumption, and increased energy consumption.
Inactive Publication Date: 2020-03-06
NEW FOUNDER HLDG DEV LLC +2
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Problems solved by technology
[0005] The traditional heating method consumes a lot of energy, and it is easy to cause negative suction of external air into the fractionation tower system. When the air separation device is turned on again, it must be thoroughly heated to make it dry, which further increases energy consumption.
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[0042] In order to understand the above-mentioned purpose, features and advantages of the present invention more clearly, the present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments. It should be noted that, in the case of no conflict, the embodiments of the present application and the features in the embodiments can be combined with each other.
[0043] In the following description, many specific details are set forth in order to fully understand the present invention. However, the present invention can also be implemented in other ways than described here. Therefore, the protection scope of the present invention is not limited by the specific implementation disclosed below. Example limitations.
[0044] The control method of the air separation device according to some embodiments of the present invention will be described below with reference to the accompanying drawings.
[0045] Such as image 3 a...
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The invention provides an air separation plant control method. An air separation plant comprises a cooling box, a fractionating tower system located in the cooling box, a thermal insulation material contained into the cooling box in a filling manner, a compressor and a molecular sieve adsorber connected between the compressor and the fractionating tower system, and the fractionating tower system comprises an upper tower, a lower tower and a main condensation evaporator connected between the upper tower and the lower tower and communicated to the upper tower; and the air separation plant control method comprises the steps that when the air separation plant is halted, the compressor and the molecular sieve adsorber are controlled to be stopped, heating treatment on the fractionating tower system is avoided, and therefore the temperature of the fractionating tower system is not higher than the temperature of the thermal insulation material. By means of the air separation plant control method, during halting, the fractionating tower system is not heated, the fractionating tower system exchanges heat with the thermal insulation material so that the temperature of the fractionating towersystem can rise, and negative absorption caused by pressure reduction in the fractionating tower system is avoided.
Description
technical field [0001] The invention relates to the technical field of air separation, and more specifically, relates to a control method of an air separation device. Background technique [0002] Air separation plant (air separation plant) is a kind of high energy consumption equipment, and the energy consumption of air separation plant is very large. The energy consumption in the operation of the air separation plant accounts for more than 80% of its total cost, and the raw material air compressor (compressor) is the "large energy consumer" of the air separation plant. [0003] At present, the low-temperature cryogenic air separation equipment adopts molecular sieve front-end adsorption to remove moisture, carbon dioxide, and hydrocarbons in the raw air. This process does not have a separate heating flow path (dryer + Roots blower + heater = heating temperature pipeline), but directly use the dry positive flow feed air from the molecular sieve adsorber to heat the fractio...
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IPC IPC(8): F25J3/04
CPCF25J3/04769F25J2210/40F25J2280/30F25J3/04824
Inventor 钱立新
Owner NEW FOUNDER HLDG DEV LLC