JPH11230049A - Operation controller of dewatering raw liquid supplying pump - Google Patents

Abstract

PROBLEM TO BE SOLVED: To stabilize the water content of raw materials to be obtained by dewatering and filtering treatment by supplying the suitable amount of dewatering raw liquid to filtration equipment for dewatering. SOLUTION: A dewatering facility provided with filtration equipment for dewatering 5 for dewatering and filtering raw liquid 2, and a dewatering raw liquid supplying pump 3 for supplying dewatering raw liquid 2 to the filtration equipment for dewatering 5 is provided with a filtration liquid amount detecting device 9 for detecting the dewatering filtration liquid amount from the filtration equipment for dewatering 5, and a controller 10 for stopping the raw liquid supplying pump 3 when the dewatering filtration liquid amount detected by the filtration liquid amount detecting device 9 becomes the specified value or less.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an operation control device for a dehydration stock solution supply pump for controlling the operation of a dehydration stock solution supply pump for supplying a dehydration stock solution to a dehydration filtration device in a dewatering facility.

[0002]

2. Description of the Related Art In a dehydration facility, the operation control of a dehydrating undiluted solution supply pump for supplying a dehydrated undiluted solution from a undiluted tank to a dehydration filtration device is conventionally performed by detecting the operating time of the dehydrating undiluted solution supply pump.
Means have been used in which after a predetermined operation time has elapsed, the operation of the dewatering stock solution supply pump is stopped, and the supply of the dewatering stock solution to the dewatering filtration device is stopped.

[0003]

However, if such an operation control is performed, the operation of the dehydrating stock solution supply pump is uniformly stopped after a predetermined time has elapsed, so that the operation of the dewatering filtration device depends on the properties of the stock solution. There is a possibility that the supply amount of the dehydration stock solution may become excessive or deficient, and the water content of the raw material obtained by the dehydration filtration treatment may vary widely.

The present invention solves such a problem in the operation control of a stock pump for supplying a stock solution for dehydration, and supplies an appropriate amount of a stock solution for dehydration to a dewatering / filtration device to stabilize the water content of a raw material obtained by a dewatering / filtration process. It is an object of the present invention to provide an operation control device for a dehydrating stock solution supply pump that can perform the operation.

[0005]

SUMMARY OF THE INVENTION An operation control device for a dehydrated undiluted solution supply pump according to the present invention includes a dehydration filtration device for dehydrating and filtering a dehydrated undiluted solution, and a dehydrated undiluted solution supply pump for supplying the dehydrated undiluted solution to the dehydration filtration device. In the dehydration equipment, a filtrate amount detection device that detects the amount of dehydrated filtrate from the dehydration filtration device, and a control device that stops the dehydration stock solution supply pump when the dehydration filtrate amount detected by the filtrate amount detection device becomes smaller than a predetermined value. The above problem has been solved by providing.

When the dehydration filtration process is performed in the dehydration equipment, since the dehydration filtration device is empty at the start of operation, a large amount of the dehydration undiluted solution is supplied from the dehydration undiluted solution supply pump to the dehydration filtration device depending on the operation characteristics of the dehydration undiluted solution supply pump. The amount of dehydrated filtrate supplied and discharged from the dehydration filtration device is also large. As the dehydration filtration process progresses and the raw materials are accumulated in the dehydration filtration device, the amount of the dehydration undiluted solution supplied from the dehydration liquid supply pump to the dehydration filtration device decreases, and the amount of the dehydration filtrate discharged from the dehydration filtration device also decreases. .

[0007] The amount of dehydrated filtrate discharged from the dehydration filtration device is detected by a filtrate amount detection device, and the detected value is sent to a control device. When the detected amount of the dehydrated filtrate is smaller than the predetermined value, the control device determines that an appropriate amount of the dehydrated undiluted solution has been supplied to the dehydration filtration device, and stops the dehydrated undiluted solution supply pump.

[0008] The dehydration filtration device discharges the obtained raw material after the dehydration filtration treatment is completed, becomes empty, and repeats the above cycle again. The operation control device for the dehydrating stock solution supply pump of the present invention detects the amount of the dehydrated filtrate and reliably grasps the degree of dehydration of the raw material and controls the dewatering stock solution supply pump, so that an appropriate amount of the dehydrated stock solution can be supplied to the dewatering filtration device. Thus, the water content of the raw material obtained by the dehydration filtration can be stabilized.

[0009]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS FIG. 1 is a configuration diagram of a dehydration facility provided with an operation control device of a dehydrating stock solution supply pump according to an embodiment of the present invention.

Here, the dehydrating equipment includes a stock solution tank 1 for storing the stock solution 2, a dewatering filtration device 5 for making the stock solution 8 by dewatering and filtering the stock solution 2, and a dewatering and filtering device for feeding the stock solution 2 to the stock solution tank 1. 5 is provided.

The dehydrating stock solution supply pump 3 has a suction side connected to the discharge port 13 of the stock solution tank 1 and a discharge side connected to the dewatering filtration device 5 via the stock solution supply pipe 4. 2 is sucked from the undiluted solution tank 1, pressurized and fed to the dehydration filtration device 5.

The number of rotations of the motor 6 is controlled by the control device 10 so that the pressure required to pump the dehydrated concentrate 2 to the dehydrated concentrate supply pump 3 is generated. The stock solution supply pipe 4 is provided with a pressure gauge 11, and can measure the supply pressure of the stock solution for dehydration. Further, a water level gauge 12 is provided in the stock solution tank 1, and the water level meter 12 detects the level of the dehydrated stock solution 2 in the stock solution tank 1 and sends it to the control device 10.

The dehydration filtration device 5 is provided with a filtrate amount detection device 9 for detecting a dehydration filtrate amount. Dehydration filtration device 5
The dehydrated filtrate 7 generated in the dehydration filtration process in is passed through the filtrate amount detector 9 and discharged out of the system. The filtrate amount detector 9 detects the amount of the dehydrated filtrate passing therethrough, The detected value is sent to the control device 10. A reference amount of dehydrated filtrate is preset in the control device 10 in accordance with the properties of the dehydrated undiluted solution. When the amount of dehydrated filtrate detected by the filtrate amount detection device 9 becomes smaller than this set value, the dehydrated undiluted solution is supplied. Pump 3 is stopped.

When the dehydration filtration process is performed in the dehydration equipment, the dehydration filtration device 5 is empty at the start of the operation. A large amount of undiluted solution is supplied, and the amount of dehydrated filtrate discharged from the dehydration filtration device 5 is also large. As the raw material 8 is accumulated in the dewatering filtration device 5 in the dewatering filtration process, the amount of the dewatering stock solution 2 supplied from the dewatering stock solution supply pump 3 to the dewatering filtration device 5 decreases and is discharged from the dewatering filtration device 5. The amount of dehydrated filtrate also decreases.

The amount of the dehydrated filtrate discharged from the dehydration filtration device 5 is detected by the filtrate amount detection device 9, and the detected value is sent to the control device 10. When the detected amount of the dehydrated filtrate is smaller than the set value, the controller 10 sets an appropriate amount of the dehydrated undiluted solution 2
Is determined to have been supplied to the dewatering / filtration device 5, and a stop signal is sent to the motor 6 to stop the dewatering stock supply pump 3.

When the dehydration filtration device 5 finishes the dehydration filtration process, the obtained raw material 8 is discharged and becomes empty, and the above cycle is repeated again. The operation control device of the dehydrating undiluted solution supply pump 3 detects the amount of dehydrated filtrate and reliably grasps the degree of dehydration of the raw material and controls the dehydrating undiluted solution supply pump, so that an appropriate amount of the dehydrated undiluted solution can be supplied to the dehydration filtration device. In addition, the water content of the raw material obtained by the dehydration filtration can be stabilized.

[0017]

As described above, the operation control device of the undiluted dewatering solution supply pump of the present invention supplies an undiluted undiluted solution to the dehydration filtration device to stabilize the water content of the raw material obtained by the dehydration filtration process. Can be.

[Brief description of the drawings]

FIG. 1 is a configuration diagram of a dehydration facility provided with an operation control device for a dehydrating stock solution supply pump according to an embodiment of the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Undiluted solution tank 2 Dehydrated undiluted solution 3 Dehydrated undiluted solution supply pump 4 Undiluted solution supply pipe 5 Dehydration filtration device 6 Motor 7 Dehydration filtrate 8 Raw material 9 Filtrate amount detection device 10 Control device

Claims (1)

[Claims] In a dehydration facility having a dehydration filtration device for dehydrating and filtering a dehydrated undiluted solution and a dehydration undiluted solution supply pump for supplying the dehydrated undiluted solution to the dehydration filtration device, a filtrate amount for detecting an amount of dehydrated filtrate from the dehydration filtration device. An operation control device for a dehydrated undiluted solution supply pump, comprising: a detection device; and a control device for stopping the dehydrated undiluted solution supply pump when the amount of dehydrated filtrate detected by the filtrate amount detection device becomes smaller than a predetermined value.