DE2601261A1 - DEVICE FOR CLEANING A LIQUID - Google Patents

Description

PATENT LAWYERS

DlpL-lng. P. WIRTH - Dr. V. SCHM1ED-KOWARZIK DlpL-lng. G. DANNENBERG Dr. P. WEiNHOLD Dr. D. GUDEL

L FON em ²⁸¹¹³⁴ 6 FRANKFURT / M.

° '287014 GR. ESCHENHEIMER STR. 39

January 14, 1976
Gu / -mr-

Bernard Blackburn Barefoot R.D. No. 3 Sunset Drive

Box 292

Export, Pa. 15632
United States

Device for cleaning a liquid

The invention relates to a device for cleaning a liquid, in particular a support with a vacuum filter

Schi ie Q-for draining masses or tablets from a / cone (sphincter cone) or another vessel used for clarifying or settling for cleaning water or another Liquid to be drained.

Cleaning devices for a liquid, especially water, are used to dewater slurry and solids, in order to either return the solution or to determine the moisture content of pulp, fine particles or sludge or Reduce coal sludge or seek out both purposes.

A major disadvantage is that the moisture content of the entire mass or solid or the (coal) sludge after the discharge of most conventional cleaning agents

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Input blind embossing with head (Japan) 74

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devices is very high, and generally so high to be transported on rubber conveyor belts. The collected Solid particles or the collected slurry generally have no resistance to sagging and are required a considerable cleaning in the processing area because the slurry is splashed where solid particles from the cleaning device to be collected. Most pulps and solid particles collected by a cleaning device are fed to either a vacuum drum or a disc filter to be drained in a pipe or to be transported away in liquid-tight tubs for further use.

The invention is therefore based on the object of avoiding the disadvantages mentioned. It is supposed to eir / 5 new device for Dewatering of collected slurry or solids in any facility proposed as Separating device is suitable for separating the liquids or for dewatering. In particular, cleaning devices intended for water with the features explained in more detail below, but the invention is not limited thereto will.

The invention is explained in more detail below with reference to an embodiment game from which further important features result. It shows:

Fig. 1 is a side view of a vacuum filter leg according to the invention;

FIG. 2, on an enlarged scale, a partial section through FIG. 1 with a likewise vertical arrangement; FIG.

Fig. 3

and 4 electropneumatic ^ control or regulating devices,

with which the various operating 709822/0628

dingunge.n of the vacuum filter gift ice time-controlled can be carried out.

In FIGS. 1 and 2, one is operated with a certain power isolating valve shown, for example a pinch valve 1. The valve is located below an outlet 5a for solids or a new type of mass. The outlet 5a belongs to a drainage vessel 5. Through the Valve is made up of the material flow of pulp or solid particles the vessel isolated and / or sealed. An example of such a drainage vessel is in the US patent application 552 776 of February 24, 1975.

The Isolier- or Quetschvsntil 1 has a metal housing, which includes a hose-like rubber tube or valve element la, which compresses the tube 1a when it is compressed by the supply of compressed air into an inlet 1b. Through this the valve is closed. Ss is thus mimicked the squeezing of a water hose to create a current through the To tie off the hose. When the compressed air ceases to function in whole or in part, the valve either becomes whole or partially open for throttling purposes. The valve can be modified by using a powered throttle valve · » valve is used instead, which operates similarly to the pinch valve.

A major advantage of the pinch valve is that solid particles can be caught in the discharged sludge. in that when the valve is closed, an airtight seal is achieved sooner than with a tubular valve element. This is because the pinch valve is made of flexible rubber-like material and wraps itself around the Particle lays.

Another advantage is the wringing effect of the valve when it closes, reducing the current volume in the lower

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Part of the valve, i.e. below the squeezed or closed part, is reduced, thereby squeezing out of liquid present in the trapped material in space 10 is facilitated.

Maintenance) of the isolating or sealing valve (pinch valve) 1 a section 2 with a standpipe with an inner wall 6 and an outer wall 7. Both walls close an air chamber 8 between them. They are cylindrical. A multiplicity of perforations or holes 9 is located in the bottom and through the inner wall 6, which is surrounded by the outer wall. Located directly below section 2 Another section 3, which is also designed as a sand pipe and which has a tapering or straight wall section for the cavity 10.

Below section 3 there is another separated r ter section 4 of a standpipe, which is also a tapered or straight, perforated cylindrical Wall 11 and an outer cylindrical wall 12 has. Between An air chamber 13 is in turn formed on both walls. Has in the lower part of this standpipe with two cylinders the inner cylinder wall 11 has a section where perforations or holes 14 are provided to free openings into the air chamber 13 to be formed between the two cylinders. The inner circumference also has a grid 15, or a filter medium, which is located over the perforations or holes 14 and a cage to hold the filter media.

At the bottom section of section 4 there is a closing valve (flap valve) 4a provided with an actuator, which opens and closes and an airtight seal

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trains the atmosphere. The vacuum filter leg according to the invention works as follows: Sludge (coal sleep) of a pulp or solid particles goes from the vessel 5 through the outlet 5a of the vessel and through the open isolating or pinch valve 1, through the upper section 2 and into the lower sections 3 and 4 of the standpipe. The last section has the closing valve 4a, which is closed. After the slurry the inner cavity 10 of the cylinder iat filter completely gefülli ^, the pinch valve 1 is closed by _t that pressurized air to the inlet 1b is given. Compressed air can be introduced into the section 2 through an inlet 20, as well as into the cavity 10 in order to perform an additional wringing or pressing effect for pressing out the liquid in the enclosed material in the standpipe, in a timed manner,

Air vacuum is then applied to the chamber space 13 of section 4 by sucking air through a pipe 21, to remove the entrapped water from the pulp or solids by passing air through line 20 into a space 8 in the upper area and from there through the perforations 9 into the upper section 2 of the standpipe and penetrates downward through the filter leg 10 into the lower section 3 of the standpipe. As mentioned, the vacuum is off applied to the lower section of the standpipe through line 21. The water that is not in the evacuated air is taken by gravity from the bottom of the lift chamber 13 near the bottom through a drainage pipe, which serves as a seal or as a barometer leg, and which also has an automatic check valve that not shown and which keeps the evacuated water from the sludge of the pulp or solid particles.

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In this way, the entire contained in the central cavity 10 is The sludge is dewatered and the sludge is shaped like a tablet and finally by opening the closing valve 4a submitted. This removal of the dewatered sludge can be done by hand or by actuating various control valves. However, this is preferably done using automatic timers. For this purpose, those in the earlier US patent application mentioned automatic timer described is used.

However, FIGS. 3 and 4 show a more elaborate and preferred embodiment for the automatic timer their circuit in order to clean the device according to FIGS.

Figures 3 and 4 show a pneumatic-electrical control system for the vacuum filter standpipe according to FIGS. 1 and 2. The actuation of the vacuum filter standpipe is automatic achieved by the adjustable electrical timers that electrically use a compressed air system of solenoid valves Energy is supplied to carry out all the sequences of opening and closing the valves (pinch valve or flap valve or throttle valve) to start the vacuum system and to stop the vacuum system to solve, clean the air chamber, clean the surface of the filter medium with compressed air, the evacuated water to drain from the vacuum standpipe for further use and to reset the timer to automatically the described To carry out work steps and sequences.

The timers are supplied with electrical energy. When the power supply is switched off, all timers are on Starting point of time and all valves are closed.

Before a selector switch 24 is placed in the on position, it is necessary to use a push button 25 to open the insulating

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valve or pinch valve open to fill the conical standpipe with solids or pulp. Of the The push button creates the "timer" 5 (see FIG. 4, top right) Tension to perform this function. When the timer 5 is not connected to voltage, the selector switch 24 is in the switched-on position placed, v. when the selector switch is in the switch-on position, timer 1 is started. When timer 1 starts, it starts a cam repeat timer or timer. This cam repeat timer 26 sets a series of Solenoids on and off again to draw vacuum and release the vacuum in the standpipe, and although by means of floating air cylinders C1 and C2, which are connected to each other or to a vacuum pump.

When the timer 1 has finished its cycle, it switches the Power (e.g. 110 volts) from the repeat cycle timer 26 and the timer stops. At the same time, the vacuum in the standpipe is automatically terminated. When timer 1 finishes its cycle, it flips one electrical impulse to timer 3 to start it. When timer 3 starts, it applies voltage to two solenoids and starts the timer 2. A solenoid 27 opens the closing valve 4a to let out the solidified mass. The other solenoid valve 28 opens to initiate a cleaning process Initiate standpipe for cleaning the filter medium 15.

When timer 3 has finished its cycle, it applies an electrical pulse to timer 4 to start it. if the timer 4 has started, it applies voltage to a solenoid 27a in order to close the shut-off valve 4a.

When timer 4 finishes its cycle, it sends a electrical impulse to timer 5 to start it. if

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the timer 5 starts, it applies voltage to a solenoid 29 to open the pinch valve 1, so that the solid particles or pulp flows into the standpipe. When the timer 5 has finished its cycle, it energizes a solenoid 29a to close the pinch valve. A few seconds after timer 5 has been switched off, timer 2 switches off and sends an electrical impulse to timer 1 to start the entire cycle again.

It is thus apparent that a very v / irksames Vakuumstaridrohr is suggested for dewatering of sludge, the v discharged from a cleaning vessel for liquid / ird, and to provide a substantially solid slurry or tablets to shape before it is dispensed from a closing valve, so that the sludge can be more easily handled, transported and used. Furthermore, a control system is provided for

around

suggest releasing the vacuum system, cleaning the air chamber, cleaning the surface of the filter medium with compressed air, to withdraw the evacuated water for further use, to reset the timers or timers and by predetermined ones Repeat sequences or sequences automatically.

It is therefore important in the finding that a device and a control system for receiving the sludge-like discharge from a clarifier for liquid is proposed, this being dewatered in sludge form via vacuum devices that are connected to an annular space that surrounds a standpipe that is connected to the dispensing opening. A timer and control system has a squeezing effect and discharges the dewatered sludge from a flap valve, in a timed manner, and also effects a periodic cleaning. Pos. 16 in FIG. 2 shows an actuating means for the closing valve 4a, preferably an air cylinder. / Patent or protection claims

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Claims (9)

January 14, 1976 Bernard B. Barefoot Gu / -nir- patent or protection claims 1. A device for cleaning a liquid, characterized by an outlet (5a) at the bottom of a cleaning vessel (5) for a liquid, a valve (1), one end of which is connected to the outlet, a standpipe which is connected to the other end of the Venijls, wherein the standpipe (2, 3, 4) has perforated inner wall parts and a cylindrical outer wall part which extends at a distance from and surrounds the inner wall parts to form annular air chambers (8, "> 3 _t ) , further characterized by a Closing valve (4a), which is connected to the bottom of the standpipe and with means for evacuating the annular space in order to drain the contents of the standpipe when the first-mentioned valve and the closing valve for the outlet are closed. 2. Device according to claim 1,
characterized in that the perforated parts are separated from one another by a solid cylinder wall section (3), whereby separate upper and lower annular air spaces (8, 13) are formed. 3. Device according to claim 1,
characterized in that the valve (1) mentioned in the first place is a pinch valve in the manner of a rubber hose which is surrounded by a chamber to form a space therebetween into which compressed air is introduced to compress and close the pinch valve Closing valve 709822/0628 • ι. til (4a) is a flap valve * 4. Apparatus according to claim 2, characterized in that means are provided to introduce compressed air into the upper annular space (8) in order to squeeze out the liquid from the interior of the standpipe zn erroic-hcn. 5. Apparatus according to claim 2, characterized in that that a filter closely surrounds the lowermost perforated inner cylinder wall (11). 6. Apparatus according to claim 2, characterized in that that the means for evacuating the ring chambers (8. 13) are designed as an evacuation pump with the lower Annular space (13) is connected. 7 «Device according to claim 3, characterized in that that timers for controlling or regulating the operation of the means for evacuating the annulus are provided in order to to deliver the dewatered sludge from the shut-off valve in a timed manner. 8. Apparatus according to claim 2, characterized in that that control means for periodic cleaning of the annulus and cleaning of the perforated parts with an under Pressurized fluid are provided. 70 S32 2/0628 9. Apparatus according to claim 7, characterized, that the timers include a circuit with which the solenoids can be applied to the voltage specified in Open the pinch valve (1) in the specified sequence so that solid particles or pulp flow out of the vessel (5) can to fill the sections (2, 3, 4) of the standpipe and after a predetermined time the pinch valve closed v / ird, and that air cylinders are provided, with then air from the annular spaces sucked off in order to create a vacuum there, and that the timer closes the valve after a pre-seeded time (4a) Open so that solid tablets can be dispensed and, after another period of time, the sections (2, 3, 4) of the standpipe are cleaned with water, whereupon the shut-off valve (4a) is closed, and that finally the entire sequence of operations is repeated. Patent attorney: K / 709822/0628