Dryer flow monitoring and energy-saving control system

Abstract

A flow monitoring and energy-saving control system for a dryer is provided for use in an adsorption dryer. The adsorption dryer includes a first adsorption tower, a second adsorption tower, and a pipeline assembly connecting the first adsorption tower and the second adsorption tower. The pipeline assembly is provided with multiple valves and has an inlet pipe and an outlet pipe. The system includes a gas sensor disposed in the inlet pipe and a controller electrically connected to the multiple valves and the gas sensor. The gas sensor detects multiple values ​​of an inflow gas. The controller receives the multiple values, calculates and stores a cumulative moisture content based on the multiple values, and determines whether the cumulative moisture content is greater than or equal to a moisture threshold. If so, the controller controls the multiple valves to actuate, so that the inflow gas flows into the first adsorption tower or the second adsorption tower.

Claims

1. A flow monitoring and energy-saving control system for a dryer, supplied for use in an adsorption dryer, the adsorption dryer comprising a first adsorption tower, a second adsorption tower, and a pipeline assembly, the first adsorption tower and the second adsorption tower being connected through the pipeline assembly, the pipeline assembly being provided with a plurality of valves and connected to an inlet pipe and an outlet pipe, the control system comprising: a gas sensor disposed in the inlet pipe, the gas sensor detecting a flow rate value, a temperature value, an absolute humidity value, and a pressure value of an inflow gas; and a controller electrically connected to the plurality of valves and the gas sensor and receiving the flow rate value, the temperature value, the absolute humidity value, and the pressure value from the gas sensor, the controller having a preset water content threshold and calculating and storing an accumulated water content based on the flow rate value, the temperature value, the absolute humidity value, and the pressure value, and determining whether the accumulated water content is greater than or equal to the water content threshold; If so, the controller controls the multiple valves to perform a tower switching process, causing the incoming gas to flow into the first adsorption tower or the second adsorption tower.

2. The flow monitoring and energy-saving control system for the dryer as described in claim 1, wherein: The pipeline assembly is connected to a dehumidifier, which is electrically connected to the controller. When the inflow gas flows into the first adsorption tower, the controller controls the dehumidifier to operate to dry the second adsorption tower. When the inflow gas flows into the second adsorption tower, the controller controls the dehumidifier to operate to dry the first adsorption tower.

3. The flow monitoring and energy-saving control system for the dryer as described in claim 1, wherein: The air intake pipe has an air inlet, and the gas sensor includes a flow meter and a dew point meter; the flow meter is used to detect the flow rate and temperature of the incoming gas; the dew point meter is disposed in the air intake pipe away from the air inlet relative to the flow meter, and the dew point meter is used to detect the absolute humidity and air pressure of the incoming gas.

4. The flow monitoring and energy-saving control system for the dryer as described in claim 3, wherein: The flow rate value is the single flow rate of the flow meter at a set time interval; the controller calculates a volumetric flow rate value within the set time interval based on the flow rate value, the temperature value, and the air pressure value, and determines whether the volumetric flow rate value increases; if so, the controller calculates a single moisture content within the set time interval based on the volumetric flow rate value and the absolute humidity value, and adds the single moisture content to the cumulative moisture content.

5. The flow monitoring and energy-saving control system for the dryer as described in claim 1, wherein: When the tower replacement process is completed, the controller receives a feedback signal and resets the accumulated moisture content to zero based on the feedback signal.

6. The flow monitoring and energy-saving control system for the dryer as described in claim 1, wherein: The adsorbent in the first adsorption tower and the adsorbent in the second adsorption tower have the same maximum adsorption value, and the maximum adsorption value is equal to the water volume threshold.

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