Drain treatment machine protection system

Abstract

To provide a protection system for a drain treatment machine capable of more suitably protecting and managing the drain treatment machine by more suitably monitoring pressure change of a system related to drain discharge treatment.SOLUTION: A protection system for a drain treatment machine includes: a drain discharge valve 20 which is provided to be intermittently opened so as to discharge drain from a drain generation source 10 and supply the drain to the drain treatment machine 70; a treatment tank 71 which is loaded with a filter medium of the drain treatment machine 70; an orifice 60 which is provided in a drain flow passage 30 between the treatment tank 71 and the drain discharge valve 20; a pressure sensor 40 for detecting a pressure inside the drain flow passage 30 between the orifice 60 and the treatment tank 71; a downstream side solenoid valve 50 which is provided to open and close the drain flow passage 30 between the pressure sensor 40 and the treatment tank 71; and a management device 80 which has management means including pressure change monitoring means, control means for controlling opening and closing of the downstream side solenoid valve 50, and alarm information output means.SELECTED DRAWING: Figure 1

Claims

1. A drain treatment machine that purifies drain, which is generated when moisture contained in compressed gas condenses and is discharged due to the pressure of the compressed gas, by a treatment tank loaded with a filter material, and a protection system for the drain treatment machine configured to protect the drain treatment machine, To discharge the drain from the drain source and supply it to the drain treatment machine, a drain discharge valve is provided, which is connected to the drain source and is configured to open intermittently. An orifice is provided in the drain passage between the processing tank and the drain discharge valve, A pressure sensor is provided to detect the pressure inside the drain channel between the orifice and the processing tank, A downstream solenoid valve is provided in the drain passage between the pressure sensor and the processing tank, and is configured to open and close the drain passage. A protection system for a drain treatment machine, comprising a control device including a pressure change monitoring means that receives detection information from the pressure sensor and outputs monitoring information relating to pressure changes in the drain flow path, a control means that controls the opening and closing of the downstream solenoid valve based on the monitoring information relating to pressure changes, and a control means that outputs an alarm based on the monitoring information relating to pressure changes.

2. The drain treatment machine protection system according to claim 1, characterized in that, in the control device, when the pressure change monitoring means outputs information that the pressure in the drain passage has been rising for a period of time longer than the set time for normal operation when the drain discharge valve is open, the control means closes the downstream solenoid valve and the alarm information output means outputs an alarm, and thereafter the control means controls the downstream solenoid valve to open intermittently.

3. The protection system for a drain treatment machine according to claim 2, wherein, in the control device, after the pressure in the drain passage reaches an upper limit value derived from condition elements including the pressure of the drain source and the diameter of the orifice, the control device controls the downstream solenoid valve to open intermittently, and when information is output that the pressure in the drain passage that has reached the upper limit value intermittently decreases, it is determined that there is a valve malfunction in which the drain discharge valve does not close.

4. The protection system for a drain processing machine according to claim 2, wherein, in the control device, when the pressure change monitoring means outputs information that the pressure in the drain passage has reached an upper limit value derived from conditional elements including the pressure of the drain source and the diameter of the orifice, and the control means controls the downstream solenoid valve to open intermittently, the system determines that the pressure in the drain passage that has reached the upper limit value does not change, and determines that the malfunction is due to a blockage downstream of the pressure sensor in the drain flow.

5. A protection system for a drain treatment machine according to any one of claims 1 to 4, characterized in that the drain discharge valve is a normally closed solenoid valve and the downstream solenoid valve is a normally open solenoid valve.

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