JPS61171515A - Dehydration treatment apparatus - Google Patents

Abstract

PURPOSE:To secture a constant sludge treatment amount, by setting a filtering time by detecting a total amount of a filtrate. CONSTITUTION:A total amount of the filtrate continuously discharged from a dehydrator 1 is received in a tank 6 and, when the water level of the total filtrate was contacted with a liquid level sensor 7a, a detection signal is inputted to a control part 10 from the sensor 7a and said control part 10 emits a filtering finish order to the dehydrator 1 to control the operation thereof. At the point of time when pressing treatment in the next process was finished, the control part 10 issues an operation order to a drain pump 9 and the filtrate in the tank 6 is drained by said drain pump 9. When the water level in the tank 6 is gradually lowered to reach a sensor 7b, a min. water level detection signal is inputted to the control part 10 from the sensor 7b and the control part 10 issues a stop order to the pump 9 upon the reception of said signal.

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention detects the amount of filtrate generated when dehydrating sludge etc. generated in wastewater treatment facilities, etc., and performs the filtration process based on the total amount. The present invention relates to a dehydration treatment device.

[Conventional technology]

An example of a filtration time setting mechanism in a conventional dehydration treatment apparatus will be explained based on FIG. 2.

The filtrate generated by the dewatering process in the dehydrator 1 flows into the liquid level detection tank 2 through the gutter 1a, and when the amount is larger than the amount flowing out through the opening 3 at the bottom of the liquid level detection tank 2, the filtrate flows into the liquid level detection tank 2. It overflows from the upper surface 4.

As time passes, the amount of filtrate decreases, and when it becomes less than the amount flowing out through the opening 3, the water level in the liquid level detection tank 2 decreases. The liquid level sensor 5 detects the drop in the water level and issues a signal to end the filtration.

[Problem that the invention seeks to solve]

According to this mechanism, if there is a change in the amount of filtrate due to changes in the properties of the sludge or clogging of the door cloth, etc.
There were variations in the amount of sludge treated.

In particular, when the amount of sludge processed is small, the amount of dewatered cake in the chamber of the dehydrator 1 is small, which has an adverse effect on the sludge removal in the next step, and is a major cause of a decrease in the processing efficiency of the dehydrator.

Furthermore, if the opening 3 is clogged with foreign matter, the proper time becomes abnormally long, which hinders the normal operation of the apparatus.

The present invention solves the above-mentioned problems and provides a dewatering device that detects the total amount of filtrate and sets the filtration time, thereby ensuring a constant amount of sludge throughput.

[Means for solving problems]

The present invention includes a detection mechanism that temporarily stores filtrate generated by dehydration processing in a dehydrator in a tank and detects the total amount of filtrate;
The dehydration processing apparatus is characterized by comprising a control section that receives a signal from the detection mechanism and feeds it back to the dehydrator to control the operation of the dehydrator.

〔Example〕

Hereinafter, one embodiment of the present invention will be described with reference to the drawings.

In FIG. 1, a water storage tank 6 for temporarily storing the total amount of filtrate from the dehydrator 1 is connected to the drain port of the tank 2, and a liquid level sensor 7a for detecting the set maximum water level is installed in the tank 6. , a liquid level sensor box for detecting the set minimum water level is provided, a drain pump system piping 8 for draining the remaining liquid is connected to the drain port of the tank 6, and a drain pump 9 is installed in the middle of the piping 8. do. Note that the tank 2 may be removed and the water storage tank 6 may be directly connected to the drain port of the dehydrator 1.

Further, the operation of the dehydrator 1 is controlled by receiving the highest water level detection signal from the sensor 7a, and the drain pump 9 of the tank 6 is operated by inputting the detection signal and a processing end signal in the next step. The drain pump 9 is equipped with a control section 10 that stops the drain pump 9 in response to input of a minimum water level detection signal from a sensor.

In the embodiment, the total amount of the filtrate continuously discharged from the dehydrator 1 is received in the tank 6, and the water level of the total amount of filtrate that rises over time is measured by a liquid level sensor installed in advance at an appropriate position. When it comes into contact with sensor 7a,
The detection signal is input to the control unit 10, and the control unit 10 issues a filtration termination command to the dehydrator 1 to control its operation. On the other hand, when the squeezing process in the next step is completed, the completion signal is input to the control unit 10, and the control unit 10 sends the operating fingers to the drain pump 9.
fi 716 M. A□yo Drain 1. As the pump operates, the water level in the tank 6 gradually decreases, and when the liquid level drops at the sensor 7bt, a minimum water level detection signal is input from the sensor to the control unit 10. Upon receiving the signal, the control unit 10 issues a stop command to the pump 9. [Effects of the Invention] According to the present invention, the total amount of filtrate discharged from the dehydrator is detected and the filtration time is set. The amount of sludge processed by the dehydrator can be kept constant without being affected by changes in the properties of sludge, clogging of the door cloth, etc. Therefore, the amount of dewatered cake in the door roller is constant, and the removal of sludge in the dewatering process is stable. death,
This has the effect of being able to eliminate the reduction in treatment efficiency due to poor sludge removal, and also to be able to manage the amount of sludge processed by the dewatering device.

[Brief explanation of drawings]

FIG. 1 is a block diagram showing an embodiment of the present invention, and FIG. 2 is a block diagram of a conventional device. 1... Dehydrator 6... Water storage tank 7a,
7b...Sensor 9...Drain pump 10...
・Control unit

Claims (1)

[Claims] (1) A detection mechanism that temporarily stores the filtrate generated by the dehydration process in the dehydrator in a tank and detects the total amount of filtrate, and a signal from the detection mechanism that is fed back to the dehydrator and operates the dehydrator. A dehydration treatment apparatus comprising: a control section that controls the dehydration treatment apparatus;