KR200235467Y1 - apparatus for indicating sludge leakage of filter press - Google Patents

Abstract

The present invention relates to a device for automatically checking that the sludge of the filter press is leaked, the filter press for separating and discharging the sludge-containing fluid into the filter cloth (11c), pressurized, dewatered into water and caked sludge In (11), the transfer pipe 21, one end of which is connected to the filter press 11 is connected in communication with the venturi tube 23 via the reverse direction 22, the venturi tube 23 is automatically opened and closed. The chemical mixing unit 20 in communication with the compressed air engine 25 via the valve 24, and the nozzle 31 inserted into the venturi tube 23 through the flow meter 32 are used for the flow rate. It is in communication with the control valve 33, the flow control valve 33 is connected to the medicine barrel 35 in which a certain amount of the drug is stored via the connection pipe 34 to the drug into the venturi tube (23) Air pressure formed in the drug inlet portion 30 and the filter press 11 to supply the The controller 43 is electrically connected to the pressure switch 41 to detect and has a controller 43 with a built-in timer 42, and the sludge is discharged based on the change of the air pressure measured for a predetermined time while the supply of compressed air is stopped It provides a sludge outflow automatic confirmation device of the filter press comprising a control unit 40 for determining the.

Description

Apparatus for indicating sludge leakage of filter press}

The present invention relates to a device for automatically checking that the sludge of the filter press is leaked, and more specifically, the filter press for separating the water and sludge by injecting and pressurizing the sludge contained in the waste water into the filter cloth as a pumping device in the waste water treatment facility The present invention relates to a device for automatically checking sludge outflow of a filter press, which is improved so that the sludge is discharged between the filter cloth and the filter cloth when the sludge is pressurized in the filter cloth.

In general, as shown in FIG. 6, wastewater generated in a steel mill of an ironworks is collected in a flue gas generated during the blow-up of the converter 1 by a wet dust collection method. When the pump (7) is sprayed to the separator (2), which is a wet dust collecting device, the dust in the exhaust gas is collected by the dust collected and injected into the water channel (3) to pass through the clasp (4) as the primary specific gravity After the heavy particles are removed, they are collected in the settling tank 5, and water and sludge are separated from each other by specific gravity in the settling tank 5, so that the water overflows and is supplied to the water collecting tank 6 for reuse. The sludge collected at the bottom of the sedimentation tank 5 is transferred to and stored in the sludge storage tank 9 by another pump 8, and is again conveyed to the filter press 11 by the sludge pumping pump 10 to the sludge. Water containing After that, the caked sludge is temporarily stored in the storage hopper 13 through the conveyor belt 12 and then discharged using the vehicle 13a.

In the process performed in the filter press 11, as shown in FIG. 5, the high concentration aggregated in the settling tank 5 in a state in which the filter plates 11b continuously arranged using the hydraulic device 11a are compressed. Hollow portion formed by the filter cloth 11c sealed between the filter plate 11b of the filter press 11 and the filter plate 11b adjacent to each other by transporting and pressurizing the fluid containing the sludge to the pressure pump 10. When supplied to 11d, sludge remains by the filter cloth 11c, and only water passes through the filter cloth 11c and is discharged through the grooves of the uneven portion formed in the filter plate 11b. In addition, the caked sludge remaining in the filter cloth 11c is dropped to the lower side and the conveying device is stored in the storage hopper 13 through the conveyor belt 12 and then carried out by using the vehicle 13a.

The sludge collected as described above is dehydrated while being transported and pressed to the filter press 11 to form a sludge cake, and then a series of processes of discharge treatment are continuously and automatically performed.

However, the sludge flow is checked before the sludge is conveyed to the hollow 11d of the filter cloth during a series of automatic processes in which the sludge is transported and dehydrated by the press of the sludge to form the sludge cake. Since it is impossible to do so, stacking of the filter cloth 11b between the filter board 11b and the filter board 11b or the difference between the solid sludge between the filter cloth 11b and the filter cloth 11b and between the filter board 11b and the filter board 11b or the like. When the sludge is pressed into the hollow part 11d of the filter cloth in the unstable crimping state of the filter board 11b due to the attachment of foreign matter and the failure of the hydraulic device 11a for pressing the filter board 11b, a large amount of sludge is externally Will be leaked.

Accordingly, since the sludge can be checked only during the step of pressurizing the sludge to the hollow portion 11d of the filter cloth, when the sludge is leaked, the sludge is ignored and the operation is continued or the process is automatically performed. After stopping the sludge and forcibly discharging the sludge, the area where the sludge is discharged will be taken and action is taken.

At this time, the filter plate (11c) and the filter cloth (11c) to clean it is easy to check the cleaning of the filter cloth (11c) with a high-pressure washing water in the process of cleaning the filter cloth (11c) is lowered in the water-repellent property of the filter cloth (curable cloth) due to the filter cloth ( The service life of 11c) is significantly shortened, and there is a problem in that the equipment and the surrounding environment are polluted by the sludge discharged.

In addition, if the operation is ignored while the sludge is discharged, dehydration failure occurs due to the deterioration of the pressurization pressure, and the secondary environmental pollution caused by the waste water in the process of discharging the sludge which is poor in dehydration, and requires excessive workforce by manual labor. There was a problem such as the increase in the workload of the worker and the automation and facility operation rate of the filter press 11 is significantly reduced.

In FIG. 7, reference numeral 11e is a sludge inlet, 11f is a follicle support rod, 15 is a rail, 15a is a wheel, and 16a, 16b, 16c, 16d, and 16e are V1, V2, V3, V4, V5, and V6 valves. It is absent.

Therefore, the present invention has been proposed to solve the conventional problems as described above, the purpose of which is to make it possible to automatically check whether the sludge leaks before the pressurization process of the sludge during the operation of the filter press equipment to prevent the leak of the sludge in advance It is to provide an automatic device for checking sludge outflow of filter presses that can shorten the work process, extend the life of filter cloth, reduce the work load of workers, prevent environmental pollution and improve the operation rate and automation of facilities.

1 is a perspective view showing a sludge outflow automatic confirmation device of the filter press according to the present invention,

2 is a block diagram showing a sludge outflow automatic confirmation device of the filter press according to the present invention,

3 is a pipe configuration showing the sludge outflow automatic confirmation device of the filter press according to the present invention,

Figure 4 is an installation state showing the sludge outflow automatic confirmation device of the filter press according to the present invention,

5 is a block diagram showing a typical filter press equipment,

6 is an overall configuration diagram showing a wastewater treatment facility using a general filter press facility.

Explanation of symbols on the main parts of the drawings

11 ..... Filter Press 11a .... Hydraulics

11b .... filter 11c .... filter cloth

21 ..... Transfer pipe 23 ..... Venturi pipe

24 ..... Automatic open / close valve 31 ..... Nozzle

32 ..... Flow meter 35 .....

41 ..... pressure switch 42 ...... timer

As a technical configuration for achieving the above object, the present invention,

In the filter press for pumping sludge-containing fluid into the filter cloth, pressurized, dewatered and separated into water and caked sludge,

A feed pipe connected to one end of the filter press is connected to the venturi pipe via a reverse valve, and the venturi pipe is connected to the compressed air engine via an automatic opening / closing valve;

The nozzle inserted into the venturi tube is connected to the flow rate control valve via a flow meter, the flow control valve is connected to the drug reservoir in which a certain amount of medicine is stored via the connection pipe in the venturi tube Drug inlet for supplying medicine to the

The controller is electrically connected to a pressure switch for detecting the air pressure formed in the filter press, and has a controller with a built-in timer. By providing a sludge outflow automatic confirmation device of the filter press, characterized in that it comprises a control unit for determining.

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

1 is a perspective view showing a sludge outflow automatic confirmation device of the filter press according to the present invention, Figure 2 is a block diagram showing a sludge outflow automatic confirmation device of the filter press according to the present invention, Figure 3 is 4 is a schematic diagram illustrating the sludge outflow automatic check device for the filter press, and FIG. 4 is an installation state diagram showing the sludge outflow automatic check device for the filter press according to the present invention.

1 to 4, as shown in Figures 1 to 4, connected to the filter press can easily check the outflow of the sludge during the filtration operation, such a device is a drug mixing unit 20, drug inlet 30 And the controller 40 and the like.

That is, the drug mixing unit 20 has a transfer pipe 21 having one end connected to one end of the filter press 11, and the other end of the transfer pipe 21 is a sludge zone from the filter press 11. It is connected to the venturi tube 23 via the reverse direction 22 to prevent the. In addition, the venturi tube 23 is continuously connected to the compressed air engine 25 through an automatic opening / closing valve 24 which is automatically opened and closed when an electrical signal is transmitted.

Here, the compressed air engine 25 is connected to the compressed air main supply pipe 19 to supply high pressure compressed air to the venturi pipe 23 side when the automatic opening and closing valve 24 is opened.

And, the drug inlet portion 30 is to inject the drug into the inside when the compressed air flow into the venturi tube 23 through the connection hole (23a) formed on the outer surface of the venturi tube (23) Is inserted, the inserted end is provided with a tubular nozzle 31 bent in the direction of the compressed air flow, the rear end of the nozzle 31 is a flow control valve that can be opened and closed to enable flow rate control via the flow meter (32) In communication with (33).

Here, the flow meter 32 has a flow ball 32a for vertical flow so that the flow of fluid flows in only one direction, and a transparent glass 32b for observing the fluid flow therein and the flow ball 32a. It consists of a cylindrical flowmeter main body 32c.

And, the rear end of the flow control valve 33 is connected in communication with the medicine barrel 35 having an internal space so as to store a certain amount of the drug via the connection pipe 34 having a predetermined length, the medicine container ( The open upper part of the 35 is sealed by a cover member 36 having an air hole 36a and a chemical injection hole 36b, and a lower end of the connecting pipe 34 is the bottom of the medicine container 35 in which the medicine is stored. It is preferable to arrange | position so that a surface may be reached.

Here, the medicine stored in the medicine container 35 is a water-repellent component that maintains the water repellency of the filter cloth of the filter press 11, a pigment component easy to see with the naked eye and a foaming component that is easily formed foam and sludge in the filter cloth It is preferable to mix the anti-sludge component in a predetermined ratio to prevent adhesion, and if the pigment and foam easily generated by the water repellent component and the anti-sludge agent is generated, only the above two components may be used. In addition, the drug is preferably composed of only components that do not cause environmental pollution.

In addition, the controller 40 is provided with a pressure switch 41 mounted to the front end pipe of the V3 valve 16c to detect the internal air pressure formed by the compressed air introduced into the filter press 11, the pressure The controller 41 is electrically connected to the switch 41 and electrically connected to the automatic open / close valve 24 and includes a controller 43 having a timer 42 therein. The controller 43 shuts off the automatic open / close valve 24 and stops supply of compressed air, so that the air pressure change in the filter press 11, that is, the pressure switch 41, is set for the set time of the timer 42. It is to determine whether the sludge is discharged by comparing the initial pressure value measured at and the preset reference pressure value with each other.

The operation and effects of the present invention having the configuration as described above will be described.

In the filtration process of the filter press 11 to which the present invention is applied, as in the prior art, the sludge pumping pump 10 is started in the state in which the crimping of the filter plate 11b is completed to open the fluid including the sludge to open the V1 valve. A process of dewatering by pressurizing and pressurizing for T1 hour into the hollow portion 11b of the filter cloth 11b through 16a, wherein only the water dehydrated in the filtration process is discharged by opening the V2, V3 valves 16b and 16c. The V4 and V5 valves 16d and 16e and the automatic opening and closing valve 24 are kept closed.

Subsequently, the through blow process is a process in which compressed air is supplied for T2 hours to secondaryly separate and discharge the water contained in the caked sludge in the filtration process, where the compressed air main supply pipe supplies compressed air. When the V4 valve 16d connected to 19 is opened to forcibly supply compressed air to the filter plate 11b side of the filter case 11, the dewatered water is discharged through the open V3 valve 16c. The V1, V2 and V5 valves 16a, 16b and 16e and the automatic open / close valve 24 remain closed or closed.

In addition, the backblow process is a process of separating the sludge cake from the filter cloth 11c by supplying compressed air into the filter press 11 for T3 hours, and in this case, the V2 and V4 valves 16b and 16d are removed. Opening and supplying compressed air while opening the V5 valve 16e to discharge the dehydrated water, the V1 and V3 valves 16a and 16c and the automatic open / close valve 24 remain closed or closed.

In addition, the liquid process is a process of finally discharging the remaining water. At this time, the V2, V3, V5 valves 16b, 16c, 16e are opened to discharge water, and the V1, V4 valves 16a ( 16d) and the automatic open / close valve 24 are closed or remain closed.

When the dewatering process of the sludge is finished, the compressed filter plate 11b is opened in turn, and the caked sludge is discharged to the lower conveyor belt 12 to be temporarily stored in the storage hopper 13, and the cake is When the discharge of the sludge is completed, the filter plate (11b) is pressed again by the hydraulic device (11a) and then the step of checking the leakage of the sludge is automatically performed by the signal of the controller 43.

That is, in the process of checking the outflow of the sludge in the filter press 11, first, the V1, V2, V3, V4, V5 valves 16a, 16b, 16c, 16d, 16e are shut off and completely sealed. In the opened state, when the automatic opening and closing valve 24 mounted on the compressed air engine 25 is opened, compressed air is introduced into the venturi tube 23 installed at the front end to pass through the inside of the venturi tube 23. Due to the partial output of the compressed air flowing in the venturi tube 23 at a high speed, a vacuum is formed in the nozzle 31 in which the tip is inserted into the connection hole 23a of the venturi tube 23.

In this case, the flow ball 32a embedded in the flow meter 32 connected to the rear end of the nozzle 31 is raised under the influence of the vacuum force in the venturi tube 23 and the upper end of the connecting tube 34 meets. Since the lower hole of the flow meter 32 is opened, the medicine stored in the medicine container 35 through the opened lower hole is transferred to the venturi tube 23 through the connecting pipe 34, the flow meter 32, and the nozzle 31. It is supplied into the feed pipe 21 while being mixed with the compressed air introduced into the venturi tube 23, which is introduced into and introduced into the venturi tube 23, and is supplied into the compressed filter plate 11b through the shear pipe of the V3 valve 16c. .

Then, when a predetermined air pressure is formed in the hollow portion 11d of the filter cloth 11c by compressed air mixed with the medicine supplied into the compressed filter plate 11b, the front valve of the V2 valve 16b is mounted. When the pressure switch 41 is operated and the signal is recognized by the controller 43, the automatic opening / closing valve 24 installed in the compressed air engine 25 is switched to the closed state to block the supply flow of the compressed air.

Since the vacuum pressure at the tip of the nozzle 31 inserted into the venturi tube 23 is continuously removed, the flow ball 32a in the flowmeter 32 descends due to its own weight, and the outlet of the connecting pipe into which the medicine is introduced. Blocking the lower hole to stop the further inflow of the drug into the venturi tube 23, and at the same time the reverse displacement 22 is installed between the transfer pipe 21 and the venturi tube 23 is blocked the filter press ( The compressed air supplied into the filter plate 11b of 11) is prevented from flowing back.

In this state, the air pressure state in the hollow portion 11b of the sealed filter cloth 11c is maintained for a time set in the timer 42 embedded in the controller 43, and at this time, the pressure change state in the hollow portion 11b is maintained. It is detected as the pressure switch 41, if there is no change in the air pressure for a set time, it is determined that there is no outflow of sludge, the controller 43 ends the sludge outflow confirmation process and normally starts the filtration process, which is the next process Work continues in the order described above.

On the other hand, if the air pressure falls within the lower limit set pressure value of the pressure switch 41 within the time set in the timer 42, the controller 43 that detects this will generate an alarm. This is a result of the air being discharged to the outside due to the poor compression of the filter plate 11b, the filter cloth 11c or the failure of each of the valve members 16a, 16b, 16c and 16e. The outflow site can be easily identified by the supplied medicine.

That is, when the outflow site is between the filter plate (11b) and the filter cloth (11c) of the specific place, the air is ejected to the outflowing place as the drug generates colored bubbles, so that the operator can easily check the naked eye. Will be able to follow up by checking the relevant places.

Then, when the drug is ejected together with the air between the whole filter board (11b), this is because the pressing force is poor due to the abnormality of the hydraulic device (11a) to check the operating state of the hydraulic device (11a) and follow-up actions, each board 11b When there is no ejection of the drug through the gap between the valves, it is determined that the drug flows out of the valve members 16a, 16b, 16c, and 16e, and the follow-up is performed accordingly.

In addition, it is possible to extend the service life of the filter cloth (11c) by coating and protecting the surface of the filter cloth (11c) by the anti-sludge component contained in the drug flowing into the filter plate (11b) during each repeated leak check process. will be.

According to the present invention as described above, by simply checking whether the sludge outflow before the sludge pressurization step during the sludge filtration operation by the filter press to prevent the outflow of the sludge in advance, to prevent contamination of the surrounding environment, the operator's work The practical effect is to reduce the load, achieve the automation of the equipment, improve the equipment operation rate, and extend the service life of the filter cloth.

While the subject innovation has been shown and described with respect to specific embodiments, it will be apparent to those skilled in the art that various modifications and variations can be made without departing from the spirit or scope of the subject innovation as provided by the following claims. I would like to clarify that knowledge is easy to know.

Claims (3)

In the filter press 11 which presses and dehydrates the fluid containing sludge into the filter cloth 11c, and discharges it into water and caked sludge separately, The transfer pipe 21, one end of which is connected to the filter press 11, is connected to the venturi pipe 23 via the reverse valve 22, and the venturi pipe 23 mediates the automatic opening / closing valve 24. The drug mixing unit 20 is in communication with the compressed air engine 25, The nozzle 31 into which the tip is inserted into the venturi tube 23 is connected to the flow regulating valve 33 via the flow meter 32, and the flow regulating valve 33 is connected to the connecting pipe 34. The drug inlet unit 30 is connected in communication with the medicine container 35 in which a predetermined amount of medicine is stored and supplies the medicine into the venturi tube 23. The controller 43 is electrically connected to the pressure switch 41 for detecting the air pressure formed in the filter press 11, and has a controller 43 having a built-in timer 42. The measurement is performed for a predetermined time while the supply of compressed air is stopped. And a control unit (40) for determining whether sludge is discharged based on the change in air pressure. The method of claim 1, The flow meter 32 is a cylindrical flow meter having a flow ball 32a vertically flowing so that the flow of fluid flows in only one direction, and a transparent glass 32b to observe the fluid flow therein and the flow ball 32a. Sludge outflow automatic confirmation device of the filter press, characterized in that the main body (32c). The method of claim 1, The drug is a water repellent component that maintains the water repellency of the filter cloth of the filter press 11, a pigment component that is easy to see with the naked eye, a foaming component that is easily formed foam and a sludge prevention component to prevent the sludge is attached to the filter cloth is constant Sludge outflow automatic check device of the filter press, characterized in that the mixing ratio.