KR200224816Y1 - centrifugal enriched sinking set adhered sludge discharge automatic controller - Google Patents

Abstract

The present invention relates to a centrifugal concentration settler equipped with an automatic sludge discharge control device, wherein the concentrate discharge port is disposed at one end of the shell shell and the driving means of the bowl and the shell shell at the same time. In the sludge tank and the condenser, which is interlocked with all-shells and the differential interlocking means, and consists of a screw conveyor rotating with a predetermined rotation difference with the bowl, and a rotation control device for controlling the rotation difference between the screw conveyor and the bowl. It is installed and automatically detects the concentration of the solids of the sludge thickening sludge with an impeller and outputs the detected concentration value automatically according to the output value of the discharge automatic control device and the discharge concentrated sludge concentration It is composed of an automatic control means for controlling the wheel difference control device As, without being influenced by the solids concentration in the feed sludge it has the advantage that can be maintained automatically schedule the solids concentration of the concentrated sludge.

Description

Centrifugal enriched sinking set adhered sludge discharge automatic controller

The present invention relates to a centrifugal thickener settler equipped with an automatic sludge discharge control device. In particular, the concentration of the sludge discharged from the thickener can be automatically and constantly adjusted even if the concentration of the feed sludge supplied to the thickener is changed. Since the current supplied to the driving motor is changed sensitively according to the sludge viscosity by installing the control device, the centrifugal with the sludge discharge automatic control device that can measure the viscosity of the sludge immediately and accurately according to the changing current intensity. Relates to a thickened settler.

In general, excess sludge generated from treatment facilities such as sewage, excreta, and industrial wastewater is applied to the sludge feed sludge with a concentrator, and the concentration of solids is concentrated at a predetermined ratio by the centrifugal force to digest or dehydrate the sludge. The solids concentration control of the thickened sludge discharged from the thickener is performed by varying the rotational difference per minute between the screw conveyor and the bowl shell corresponding to the thickened sludge discharge rate, or changing the depth of the liquid layer inside the rotary cylinder with a dam or skimmer.

However, when the mechanical conditions such as the rotation difference and the liquid layer depth, which are the thickening sludge adjusting mechanisms, are kept constant, the concentration of solids in the feed sludge changes from low to high ratio, for example, the solids of the thickened sludge due to the change in the properties of the feed sludge. Changes in concentration are inevitable.

Although the solids concentration, organic matter, sedimentation rate, and SV of feed sludge affect the solids concentration of concentrated sludge, it is impossible to control the rotation difference or liquid layer depth in accordance with these changes in actual operation.

Changes in the solids concentration or the organic content of the actual feed sludge may change the solids concentration of the thickened sludge. For example, the normal operation of the feed sludge with a concentration of 0.5% of the solids concentration is 5% of the solids of the feed sludge. If the concentration is changed to 0.8%, the solids concentration of the thickened sludge becomes 7% or more, which causes the failure of the thickened sludge conveying pump and the function of the digester or the dehydrator used in the aftertreatment process.

Therefore, the present invention was devised to solve the problems described above, and the sludge in the slurry state, which has a relatively low concentration, and the concentration of which changes over time, is the object of concentration, and the sludge is supplied under constant supply conditions and under normal operating conditions. Not only can discharge the sludge from the concentrated sludge tank from the concentrated liquid discharge port of this thickener, but also the automatic discharge device is installed so that the current supplied to the driving motor is sensitively changed according to the viscosity of the sludge. It is an object of the present invention to provide a centrifugal thickener settler equipped with a sludge discharge automatic control device that can measure the viscosity of sludge immediately and accurately according to the current intensity.

Centrifugal concentrator settler equipped with an automatic sludge discharge control device according to the present invention for achieving the above object is the bowl shell and the shell shell driving means and the bowl shell is installed at the other end of the concentrated liquid discharge port at the other end; A concentrator comprising a screw conveyor which is disposed and interlocked with the bowl by means of differential interlocking means, and which rotates with the bowl with a predetermined rotation, and a rotor control device for controlling a difference between the screw conveyor and the bowl; And a discharge sludge concentration which is installed in the sludge tank and which discharges sludge concentration according to the output value of the discharge automatic control device and the discharge automatic control device which detects the solids concentration of the sludge concentrated sludge by means of an impeller and outputs the detected concentration value. To automatically control the rotor control to be maintained at Characterized in that the control means.

1 is a centrifugal concentration settler with a sludge discharge automatic control device according to the present invention

Schematic structural diagram,

Figure 2 of the centrifugal concentration settler with a sludge discharge automatic control device according to the present invention

Schematic diagram showing the state of controlling the concentration automatically,

Figure 3 of the centrifugal concentration settler with a sludge discharge automatic control device according to the present invention

Sectional view showing automatic discharge control.

Explanation of symbols on the main parts of the drawing

1: sludge inlet 2: separation liquid outlet

3: concentrate outlet 4: frame

5: casing 6: bowl shell

7: Screw Conveyor 8: Concentrate Discharge Port

9: gearbox 10: differential pulley

11 separation liquid discharge port 12 feed zone

13: drive motor 14: differential motor

15: concentrated liquid switching valve 16: automatic discharge control device

17: signal converter 18: concentration control device

19: speed converter 20: sludge supply pump

21: sludge tank 22: through hole

24: fixed plate

25 housing 26 connector

27: axis of rotation 28: impeller

29: rotation speed detection unit 30: current detector

31: Converter 32: Program Logic Controller

33: bearing flange 34: bearing bushing

35: bearing 36: snap ring

Hereinafter, with reference to the accompanying drawings of the present invention will be described in detail.

Figure 1 is a schematic structural view showing a centrifugal concentration settler with a sludge discharge automatic control device according to the present invention, Figure 2 is automatically centrifugal concentration settler with a sludge discharge automatic control device according to the present invention Figure 3 is a system diagram showing a control state, Figure 3 is a cross-sectional view showing the automatic discharge device of the centrifugal concentration settler with a sludge discharge automatic control device according to the present invention.

As shown in these figures, the centrifugal concentration settler equipped with an automatic sludge discharge control device according to the present invention is the bowl shell 6 and the separation liquid discharge port 11 is provided at one end with the concentrate discharge port 8 and the A screw disposed in the bowl shell 6 and the driving means of the bowl shell 6 and interlocked with the bowl shell 6 through a differential interlocking means and rotating with a predetermined rotation difference with the bowl shell 6. Concentrator consisting of a rotor control device for controlling the rotation difference between the conveyor (7) and the screw conveyor (7) and the bowl shell (6) and the sludge tank 21, the solid concentration of the sludge thickening sludge According to the output value of the discharge automatic control device 16 and the discharge automatic control device 16 which detects the impeller 28 and outputs the detected concentration value, the discharge concentrated sludge concentration is automatically maintained at a predetermined predetermined value. It consists of an automatic control means for controlling the rotary difference control device.

Here, the discharge automatic control device 16 and the housing 25 is coupled to the upper portion of the fixed plate 24 is equipped with a drive motor 23 is built in the rotation sensor (not shown) in the edge of the through hole 22 and Impregnating the impeller 28 and the impeller 28 installed at the lower end of the rotary shaft 27 coupled to the rotary shaft 27 of the driving motor 13 in the sludge and rotating the sludge according to the viscosity of the sludge The viscosity of the sludge is connected to the rotation speed detector 29 and the connector 26 electrically connected to the drive motor 13 to detect the rotation speed of the driving motor 13 which is changed by the resistance applied to the impeller 28. According to the present invention, a converter for converting an analog signal of the current detected by the current detector 30 and the current detector 30 to detect the resistance acting on the impeller 28 by the current change of the driving motor 13 ( 31) and a program logic controller 32 configured to set a viscosity coefficient according to the digital signal converted by the converter 31.

Here, the rotating part fixed to the frame 4 as a bearing, the gear box 9, the screw conveyor 7, the bowl shell 6 transfers the rotation of the drive motor 13 to the drive pulley 13a by V-belts. It rotates at high speed by the rotary drive means, and generates the centrifugal force required for separation, concentration and discharge.

The sludge supplied to the feed zone 12 through the sludge inlet 1 is classified into a separation liquid and a concentrated liquid by centrifugal force.

The separation liquid flows out through the separation liquid discharge port 11 and is discharged by the separation liquid discharge port 2 collected in the casing 5.

Here, the concentrate is interlocked with the bowl shell 6 through a differential interlocking means including a gearbox 9, a differential pulley 10, and the like, and by the bowl shell 6 at a slow rotational speed with a minutely rotational difference. It is concentrated by the rotating screw conveyor 7 and moves to the concentrate discharge port 8 side.

In addition, the differential pulley 10 is a predetermined rotation difference is obtained by the rotation difference control device Is controlled.

The concentrated sludge concentrated to the required concentration is pushed out of the concentrated liquid discharge port 8 and discharged by the concentrated liquid discharge port 3 collected in the casing 5.

An automatic control device for automatically controlling the rotation difference between the screw conveyor 7 and the bowl shell 6 is attached to the concentrator, and the concentration of solids of the thickener sludge discharged from the concentrator is discharged by the automatic control device 16. By using a change in the detection signal generated by the discharge automatic control device 16 at all times, the screw conveyor with the concentrator so as to maintain the solid concentration of the concentrated sludge at a predetermined value even when the solid concentration of the feed sludge is changed. 7) is to automatically control the rotation difference between the bowl shell (6).

The sludge supplied from the sludge supply pump 20 through the feed pipe is separated into a concentrate and a concentrate by a concentrator, but the concentrate sludge is an impeller (solid) concentration to the discharge automatic control device 16 installed in the concentrate sludge tank 21. 28) is detected.

That is, the automatic discharge control device 16 functions as a detector for detecting the solids concentration of the concentrated sludge discharged from the concentrator at all times and generating the detection signal.

The detection signal generated from the automatic discharge control device 16 is input to the signal converter 17, converted into a required signal, and input to the speed converter 19, where it generates a command necessary to control the rotational speed.

That is, the speed converter 19 constitutes a rotation control device for controlling the rotation difference between the screw conveyor 7 and the bowl shell 6, and also the signal converter 17, the concentration control device 18, The speed converter 19 constitutes an automatic control means for controlling the rotary difference control device based on the signal output from the discharge automatic control device 16.

On the other hand, the automatic discharge device 16 is mounted on the edge of the through-hole 22 formed in the fixed plate 24 is equipped with a drive motor 13 with a built-in rotation sensor (not shown), the drive motor 13 The rotating shaft 27 is installed to be inserted into the through hole 22 to be rotated, in which the bearing flange 33 is coupled to the lower portion of the fixed plate 24, the bearing bushing 34 and the bearing 35 and the snap ring Combining the 36 so that the rotary shaft 27 is smoothly rotated.

In addition, the impeller 28 is coupled to the end of the rotation shaft 27, and the housing 25 is mounted on the fixed plate 24 mounted to the driving motor 13 to protect the driving motor 13.

In addition, the drive motor 13 is electrically connected to the connector 26 for connecting the current detector 30 to the terminal to detect the current change generated when the drive motor 13 is rotated, the current detector 30 A converter 31 for converting the current change value of the analog signal detected by the digital signal into a digital signal is connected, and a program logic controller 32 configured to set the digital signal converted by the converter 31 to a viscosity coefficient. do.

On the other hand, the drive motor 13 is already set in the manufacturing revolutions per minute, the current supplied in correspondence with the power and the rotational speed of the drive motor 13 is set, the strength per minute and the required current strength Is a measurement taken from the ground.

Here, the discharge automatic control device will be described in more detail.

First, the automatic discharge control device 16 is installed in the sludge tank 21 in which predetermined sludge is accommodated. After immersion, the impeller 28 is submerged from the surface of the sludge to a predetermined depth. Then, when the driving motor 13 is rotated by applying power to the driving motor 13, the rotating shaft 27 is rotated by the rotation of the driving motor 13. At the same time, the impeller 28 submerged in the sludge is also rotated.

At this time, when the viscosity of the sludge is in a thin state, since the resistance acting on the impeller 28 is small, the rotation speed is relatively close to the rotation speed set in the driving motor 13, whereas in the viscous state of the sludge, In turn, the resistance acting on the impeller 28 rotates less than the rotational speed set by the driving motor 13, and the rotational speed of the driving motor 13 is a rotation sensing sensor built in the driving motor 13. And the value are transmitted to the program logic controller 32 by the rotation speed detection unit 29.

In this case, when the viscosity of the sludge is thin, the viscosity is low and the resistance of the sludge acting on the impeller 28 is small, so that the impeller is relatively spontaneously rotated, and the current of the driving motor 13 is low in current. A change occurs.

On the other hand, when the sludge is in a viscous state, a load is applied to the impeller 28 and the current usage of the driving motor 13 increases as the amount of current increases.

The current change is detected by the current detector 30 as an analog signal, and the detection result of the analog is converted into a digital signal by the converter 31, and the digital signal converted by the converter 31 is converted to each signal value. The sludge coefficient is transmitted to the program logic controller 32 in which the program logic is already built so as to set the viscosity coefficient value, and the viscosity of the sludge is refined by the rotation speed received from the rotation speed detection unit 29 and the amount of current change received by the digital signal. I can measure it easily.

That is, the rotation speed and the impeller 28 initially set in the driving motor 13 are submerged in the sludge, and the error when the rotation and the current change amount of the driving motor 13 are converted into viscous coefficients in the program logic controller 32. The viscosity of the present sludge can be measured.

As described above, the centrifugal concentrate settler equipped with the sludge discharge automatic control device according to the present invention has the following effects.

First, the centrifugal concentrate settler equipped with an automatic sludge discharge control device according to the present invention has an advantage of automatically maintaining a constant solid concentration of the concentrated sludge without being influenced by the solid concentration change of the feed sludge.

Second, the discharge automatic control device installed in the centrifugal concentration settler equipped with the sludge discharge automatic control device according to the present invention is because the current supplied to the drive motor is sensitively changed according to the viscosity of the sludge, the sludge according to the changing current intensity The advantage is that the viscosity of the sample can be measured immediately and accurately.

Claims (2)

The concentrated shell discharge port is disposed at the other end, and the shell shell having the separation liquid discharge port at the other end thereof is disposed in the bowl shell driving means and the bowl shell, and interlocked with the bowl shell and the differential interlocking means. A condenser consisting of a screw conveyor rotating with a screw and a rotor control device for controlling a rotation difference between the screw conveyor and the bowl, and installed in the sludge tank, and detecting a solid concentration of the slurry-concentrated sludge from an impeller and detecting the concentration level thereof. Sludge characterized in that it is composed of an automatic control means for automatically controlling the rotor control device so that the discharge concentration sludge concentration is maintained at a predetermined predetermined value in accordance with the discharge automatic control device for outputting the output value of the automatic discharge device and the discharge automatic control device. Centrifugal concentration settler with automatic discharge control. According to claim 1, The automatic discharge device is a housing coupled to the upper portion of the fixed plate mounted with a drive motor in which the rotation sensor is built in the through-hole, and the impeller installed on the lower end of the rotary shaft coupled to the rotary shaft of the drive motor And the impeller is immersed in the sludge and rotated to detect the rotational speed of the driving motor which is changed by the resistance applied to the impeller according to the viscosity of the sludge and the connector electrically connected to the drive motor. According to the viscosity, the resistance applied to the impeller is detected by the current change of the driving motor and the analog signal of the current detected by the current detector. And a program logic controller configured to set the viscosity coefficient according to the digital signal converted by the converter.