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US 2004/0149649 A1Published application
Filter press type dewatering system, dewatering method, deaerator, check valve, and opening/closing valve
OwnerSeiji Uchiyamainventor
Life of this patent
Estimating the term…
Abstract
A filter press type dewatering system including a filter press machine, a hydraulically driven pressure-feed pump for compressing slurry introduced from a slurry supply source and driving the slurry into the filter press machine, a pressure control valve for increasing/reducing the flow rate of pressured oil supplied to the pressure-feed pump, a flow rate sensor for detecting the flow rate of filtered water discharged from the filter press machine, a pressure sensor for detecting dewatering pressure in the filter press machine, and control means of outputting a control signal to the pressure control valve in accordance with input signals from the flow rate sensor and the pressure sensor.
Claims13
A filter press type dewatering system, comprising:
- a filter press machine;
- a hydraulically-driven pressure-feed pump for compressing slurry introduced from a slurry supply source and driving the slurry thus compressed into the filter press machine;
- a pressure control valve for increasing/reducing the flow rate of pressured oil supplied to the pressure-feed pump;
- a flow rate sensor for detecting the flow rate of filtered water discharged from the filter press machine;
- a pressure sensor for detecting dewatering pressure in the filter press machine;
- and control means for outputting a control signal to the pressure control valve in accordance with input signals from the flow rate sensor and the pressure sensor.
3 more elements
A filter press type dewatering system comprising:
- a filter press machine;
- a pressure-feed pump for compressing slurry and driving the slurry thus compressed into the filter press machine;
- and a pre-treatment device disposed at a pre-stage of the pressure-feed pump, wherein the pre-treatment device has a slurry feed path for feeding the slurry from a slurry supply source side to the pressure-feed pump side, and a microwave oscillator for irradiating microwave to the slurry on the slurry feed path.
A slurry dewatering method comprising:
- a step of irradiating microwave to slurry fed from a slurry supply source and heating/destroying cell membranes or hydrophilic colloids contained in the slurry;
- a step of compressing the slurry and driving the slurry into a filter press machine;
- and
- a step of executing solid-liquid separation of the slurry by filter fabric in the filter press machine.
1 more element
A degasifier interposed between a pressure-feed pump and a filter press machine comprising:
- an introducing port for taking slurry supplied from the pressure-feed pump;
- a bore-enlarged portion that intercommunicates with the introducing port and is enlarged in bore from the pressure-feed pump side to the filter press machine side;
- an air discharging portion intercommunicating with the bore-enlarged portion and having a discharged air guiding pipe;
- a bore-reduced portion that intercommunicates with the air discharging portion and is reduced in bore from the pressure-feed pump side to the filter press machine side;
- and
- a discharging port intercommunicated with the bore-reduced portion for feeding out the slurry to the filter press machine, wherein an exhaust pipe is connected to at least one end of the discharge air guiding pipe and a vent hole is formed in the surface at the bore-reduced portion side so that air flowing in the vent hole is discharged through the exhaust pipe to the outside.
3 more elements
A check valve comprising:
- a case having a flow-in port and a discharge port;
- a valve plug accommodating portion that is disposed in the case and has a first open portion confronting the flow-in port and a second open portion confronting the discharge port;
- a flow path through which the flow-in port and the discharge port intercommunicate with each other;
- a cap-shaped valve plug that is freely slidably mounted in the first open portion and opens/closes the flow-in port;
- a cap-shaped pressure receiving member that is freely slidably mounted in the second open portion;
- a link portion for linking the valve plug and the pressure receiving member;
- a spring that is disposed in the valve plug accommodating portion and urges the valve plug in the closing direction;
- a first seal member that is interposed between the outer surface of the valve plug and the inner surface of the first open portion and prevents fluid from flowing into the valve plug accommodating portion;
- and
- a second seal member that is interposed between the outer surface of the pressure receiving member and the inner surface of the second open portion and prevents fluid from flowing into the valve plug accommodating portion.
7 more elements
An opening/closing valve comprising:
- a case having a flow-in port and a discharge port;
- a valve plug accommodating portion that is disposed in the case and has a first open recess portion confronting the flow-in port, a second open recess portion confronting the discharge port, a partition portion through which both the open recess portions are partitioned, and a through hole formed in the partition portion;
- a flow path through which the flow-in port and the discharge port intercommunicate with each other;
- a cap-shaped valve plug that is freely slidably mounted in the first open recess portion and opens/closes the flow-in port;
- a cap-shaped pressure receiving member mounted in the second open recess portion so as to be freely slidable;
- a link portion having a front end portion connected to the valve plug and a rear end portion connected to the pressure receiving member under the state that the link portion is freely slidably inserted in the through hole;
- a spring that is disposed in the first open recess portion and urges the valve plug in the closing direction;
- a first seal member that is interposed between the outer surface of the valve plug and the inner surface of the first open recess portion and liquid-tightly seals the inside of the first open recess portion;
- a second seal member that is interposed between the outer surface of the pressure receiving member and the inner surface of the second open recess portion and liquid-tightly seals the inside of the second open recess portion;
- a third seal member that is interposed between the outer surface of the link member and the inner surface of the through hole and prevents fluid from flowing between the first open recess portion and the second open recess portion;
- a first hydraulic port intercommunicating with the first open recess portion;
- and a second hydraulic port intercommunicating with the second open recess portion.
9 more elements
Dependencies are inferred from the claim text.