Method of controlling dryer process switching time based on dew point control
A technology for controlling time and method, applied in chemical instruments and methods, separation methods, dispersed particle separation, etc., can solve problems such as failure to achieve energy-saving effects, and achieve the effects of saving energy, reducing energy, and reducing gas consumption
Inactive Publication Date: 2011-02-02
WUXI YOUYUAN IND MACHINERY
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[0004] In actual use, it is found that sometimes when one of the adsorption towers finishes working, the actual value of the dew point temperature is lower than the customer's demand, that is, it has not reached the set value required by the customer. At this time, if it is still mechanical, the process will be switched immediately according to the system setting. , will not reduce the gas consumption of the system, so the energy saving effect cannot be achieved
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[0016] The present invention will be specifically described through embodiments below in conjunction with the accompanying drawings.
[0017] Such as figure 2 As shown, the dew point control-based drier process operation switching time control method of the present invention is to perform the following control steps after the work of one adsorption tower is completed and before the work flow of the two adsorption towers is switched:
[0018] (1) PLC compares the actual value of dew point temperature collected with the set value required by the customer - run box K1;
[0019] (2) If the actual value of the dew point temperature is equal to or higher than the set value, the system will continue to switch between the two adsorption towers according to the set dew point control time - run box K4; if the actual value of the dew point temperature is lower than the set value, then let This adsorption tower continues to work, and the other adsorption tower is to be switched-operatio...
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The invention relates to a method of controlling dryer process switching time based on dew point control. A collected actual value of a dew point temperature is compared with a set value required by the client after finishing the work of an adsorption tower and before switching the workflow of two towers. If the actual value is equal to or larger than the set value, a system continues switching according to a time control. If the actual value is smaller than the set value, the adsorption tower continues working and the other adsorption tower waits to be switched. At this time, the collected actual value of dew point temperature is compared with the set value required by the client. When the actual value is equal to or larger than the set value required by the client or the time reaches a set dew point control time value, the workflow between the two towers is immediately switched to stabilize the gas supply and to save energy and protect the environment.
Description
technical field [0001] The invention relates to the field of automatic control, in particular to a control method for the process running time of a drier dew point temperature control system. Background technique [0002] The dew point temperature refers to the temperature at which air is cooled to saturation under the condition that the water vapor content and air pressure do not change. To put it figuratively, it is the temperature at which water vapor in the air turns into dew. When the water vapor in the air is saturated, the temperature is the same as the dew point; when the water vapor is not saturated, the temperature must be higher than the dew point. Therefore, the difference between the dew point and the air temperature can indicate the degree of saturation of the water vapor in the air. At 100% relative humidity, the ambient temperature is the dew point temperature. The lower the dew point is than the temperature of the surrounding environment, the less likely ...
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IPC IPC(8): B01D53/02B01D53/26
Inventor 杨福嘉
Owner WUXI YOUYUAN IND MACHINERY