KR200450431Y1 - A Pressure Pre-Coat Filter Apparatus - Google Patents

Abstract

The present invention relates to a pressure type precoat filtration device using a filtration filter, and according to the present invention, a filtration filter automatic injection device (20) for injecting a filter filter and a filtration filter injected from the filtration filter automatic injection device (20) It is connected to the precoat tank (30) by the precoat water tank (30) for mixing with water, the raw water inlet water tank (10) to store and feed the raw water to be filtered and purified, and the lower precoat pipe (P2) It is connected to the raw water inflow water tank 10 by the raw water inflow pipe (P1) branched from the lower precoat pipe (P2), pre-coating by the filter filter introduced from the precoat water tank (30) And a filtration filter (40) for filtering and purifying sludge from the raw water introduced from the raw water inflow water tank (10), and filtered and purified by the filtration tower (40). The filtered water is filtered through a filtered water pipe ( Filtration treated water tank 15 to be received and stored through P4, and branched from the filtered water pipe (P4) and connected to the precoat water tank 30, the water after the pre-coating process in the filter tower 40 It is connected to the upper side of the filter tower 40 by the upper precoat pipe (P3) and the air spray pipe (P6) to be circulated to the precoat tank 30, and stores the compressed air received from the air compressor The air compression tank 55 for injecting high pressure air for backwashing by air spraying, and is connected to the lower side of the filter tower 40 by a sludge discharge pipe (P5), the air compression tank 55 Sludge storage tank 50 for storing the liquid sludge formed of the filter filter coating layer and the sludge layer desorbed by the high-pressure air injected from the, and provided in the lower precoat pipe (P2), the precoat tank 30 Filtration of the mixture with water and the raw water In the pressure precoat filtration device using a filtration filter comprising a filtration pump 35 for forcibly transporting the raw water of the inflow tank 10 to the filtration tower 40, respectively: after performing the filtration process the filtration tower ( 40) located above the precoat water tank 30 so as to branch from the upper precoat pipe P3 and expose the inlet to the outside air in order to detach the filtration filter coating layer and the sludge layer attached to the internal filtration filter. Characterized in that it further comprises an air bleed pipe (P8). According to the above configuration, there is an advantage that the backwash can be performed more efficiently.

Diatomaceous earth, filter, tally, clogging, vortex

Description

Pressure Pre-Coat Filter Apparatus Using Filtration Filters {A Pressure Pre-Coat Filter Apparatus}

The present invention relates to a pressure type precoat filtration device using a filtration filter, and in particular, to remove the filtration filter coating layer and the sludge layer sufficiently before the backwashing process to perform a smooth backwashing process, and the filtration generated after the backwashing process. The present invention relates to a pressure type precoat filtration device using a filtration filter that is suitable for removing clogging of a filter.

Pressure precoat filtration device using filtration filter is used to filter liquid contaminants such as industrial wastewater, municipal sewage, manure, industrial wastewater and car wash wastewater by using filtration filters such as diatomaceous earth, activated carbon, cellulose, zeolite and backlite. It is a device for purification.

Among the above filter filters, diatomaceous earth is the most widely used, and diatomaceous earth is white or gray white, and its particle size is several micrometers to several tens of micrometers. It is.

1 shows a general configuration of a pressure precoat filtration device using a filtration filter according to the prior art.

As shown in FIG. 1, the pressure type precoat filtration apparatus using a filtration filter according to the related art includes a precoat water tank 30, a raw water inflow water tank 10, a filtration tower 40, and a filtration treatment tank 15. And an air compression tank 55, a sludge storage tank 50, and a filtration pump 35.

The precoat water tank 30 is a water tank that mixes filtration filter (eg, diatomaceous earth) introduced from the outside with water. The side surface of the precoat tank 30 is provided with a water level detection means (not shown) for detecting the water level of the precoat tank (30).

The raw water inflow water tank 10 is a water tank in which raw water to be filtered and purified is introduced and stored.

The filtration tower 40 is connected to the lower side of the precoat water tank 30 by a lower precoat tube P17 connected to the lower side thereof, and the raw water inflow pipe P24 branched from the lower precoat tube P17. It is connected to the raw water inflow water tank 10 by a plurality of filtration filters precoated by the filtration filter introduced from the precoat water tank 30 is provided with a plurality inside the inflow from the raw water inflow water tank 10 The sludge contained in the raw water is filtered and purified.

The upper side of the filtration tower 40 is connected to a filtration water pipe (P19) for sending the filtered water filtered and purified to the filtration water treatment tank (15), the bottom of the filtration tower 40 includes a filtration filter The sludge discharge pipe (P25) for sending the sludge to the sludge storage tank 50 is connected, the outside of the side is equipped with a pressure gauge (not shown) to know the internal pressure of the filter tower (40).

The filtration water tank 15 receives the filtration water filtered and purified by the filtration tower 40 through the filtration water pipe P19, and stores and recycles the water.

And, an upper precoat tube (P18) is connected to the upper portion of the precoat tank 30, the upper precoat tube (P18) is branched from the filtered water pipe (P19) and facing the precoat tank (30) In order to circulate the water after the precoating in the filter tower 40 to the precoat water tank (30).

The air compression tank 55 is connected to the upper side of the filter tower 40 by an air spray pipe (P20), and stores the compressed air received from the air compressor after the high pressure to perform backwashing by air spraying Air is injected into the filter tower 40.

The sludge storage tank 50 is connected to the lower side of the filtration tower 40 by a sludge discharge pipe (P25), formed of a filter filter coating layer and a sludge layer detached by the high pressure air injected from the air compression tank (55). Store the liquid sludge.

The filtration pump 35 is provided in the lower precoat pipe (P17), forcibly transferring the mixture of the filtration filter and the water of the precoat water tank 30 to the filtration tower 40, and also the raw water of the raw water inlet water tank (10) It is a configuration for conveying to the filtration tower 40 by force.

In addition, each of the pipelines are provided with valves (V17, V23, V24, V19, V18, V26) for controlling the flow of the fluid, these valves are automatically opened and closed by an electronic signal, artificial Manual valve to open and close can be selectively installed.

A pressure type precoat filtration device using a conventional filter medium configured as described above is operated as follows. Initially, the operation is started with all valves closed.

① Precoating process

The precoat water tank 30 is filled with water, and a filtration filter (for example, diatomaceous earth) is introduced from the outside, and the water and the filtration filter are mixed by a stirrer (not shown).

Open all the valves (V17) (V23) connecting the precoat water tank 30 and the filtration tower 40 and drive the filtration pump 35 to filter the mixture of filtration filter and water in the precoat water tank 30 It supplies to 40.

Thereafter, the filter tower 40 performs a process of pre-coating a filtration filter on a filtration filter (not shown). During precoating to the filtration filter, the filtration filter is attached to the outer surface of the filtration filter by the force of the filtration pump 35 and coated to a predetermined thickness, and the water continues to circulate through the precoat water tank 30 and the filtration tower 40, and a timer By setting the pre-coating progress time by the automatic termination, on the other hand, by visually confirming the see-through window 42 may be forced to terminate the pre-coating process.

Even when the above-described precoating process is completed, the filtration pump 35 is driven and continues to the filtration process. When the pre-coating process is completed as described above, the valve V18 installed in the lower precoat tube P17 and the upper precoat tube P18 connecting the precoat water tank 30 and the filtration tower 40 to the valve V18. ).

② Filtration Process

Maintain the open state of the valve (V24) (V23) installed in the raw water inlet pipe (P24) connecting the raw water inlet water tank 10 and the filtration tower 40, driving the filtration pump 35 to filter the raw water It supplies to 40.

In the filter tower 40, the sludge mixed with raw water is separated by the filter filter coating layer, and the water is sent to the filter water treatment tank 15, and the sludge is filtered from the outside of the filter filter coating layer.

When water cannot circulate in the sludge contained in the raw water, the differential pressure inside the filter tower 40 increases, and the differential pressure at this time can be confirmed by a pressure gauge.

In detail, the sludge contained in the incoming raw water is continuously filtered while being filtered through a filtration filter coating layer coated on the outer surface of the filtration filter. At this time, since the raw water does not pass through the filter filter coating layer coated on the filter due to the sludge included, the differential pressure in the filter tower 40 continues to increase, and the filtration flow rate of the treated water is further reduced. Since this means that it cannot play a role as the filtration filter, the valve (24) installed in the raw water inlet pipe (P24) connecting the filtration tower (40) and the raw water inlet water tank (10) to stop the operation of the filtration pump (35). (V23) closes the valve (V19) installed in the treatment tank inlet pipe (P19) connecting the filtration treatment tank 15 and ends the filtration process.

Meanwhile, in the present specification, the filtration filter coating layer and the sludge layer adhered thereto are referred to as 'liquid sludge' in the filtration process.

③ Backwashing Process

As described above, when the filtration tower 40 can no longer perform filtration, the filtration filter coating layer and the sludge layer (that is, liquid sludge) are separated from the filtration filter inside the filtration tower 40 through a backwashing process.

The valve V20 for supplying the high pressure air is opened, and the valve V25 for connecting the filtration tower 40 and the sludge storage tank 50 is opened to supply the high pressure air to the filtration tower 40.

The injected high pressure air is injected to the upper side of the filtration tower 40, and the filter medium coating layer and the sludge layer (ie, the liquid sludge) are separated from the filtration filter and transferred to the sludge storage tank 50 together with the high pressure air by the high pressure air. do.

When checking through a pressure gauge (not shown) or when the inside of the filter tower is clear through the internal viewing window 42, the backwashing process is terminated. At this time, the valve V20 that supplies the high pressure air is closed and the filter tower 40 is closed. ) And the valve (V25) installed in the pipeline connecting the sludge storage tank (50).

If the filter filter coating layer is formed on the filter and the filter filter coating layer is removed, the filter filter can be used semi-permanently continuously by replacing only the filter filter which is a consumable. The typical property of the filter filter is diatomaceous earth.

On the other hand, as another example of the prior art, "filtration apparatus using diatomaceous earth" is disclosed in the registration room No. 0440876.

The "filtration apparatus using diatomaceous earth" disclosed in Korean Patent Application No. 0440876, as shown in the registration publication, performs backwashing with air, and then performs backwashing with water, and filters the filter with a spray nozzle. It is characterized by mixing water.

However, the above conventional technologies have the following problems.

First, the conventional backwashing process uses a method of injecting compressed air in a direction opposite to the filtration process to remove the filter filter layer and the sludge layer (ie, liquid sludge) and simultaneously transfer the separated filter filter layer and sludge layer to the sludge storage tank. Doing.

However, in the case of the backwashing process in which only a fraction is injected in the opposite direction as described above, the residual liquid sludge is not sufficiently desorbed in the filtration filter by the continuous backwashing process, which causes clogging of the filtration filter and is operated again. During the next filtration process, the rise time of the differential pressure on the filtration filter inside the filtration tower arrives quickly, which shortens the overall filtration time, and also increases the consumption cost of the filtration filter, a consumable, resulting in an increase in maintenance costs. .

Secondly, in the prior art disclosed in Korean Patent No. 0440876, a nozzle tube pipe was installed and an air nozzle tube was installed in the nozzle tube pipe to supply compressed air to stir the filter medium and water, but this method was complicated to install. And there was a problem that takes a lot of installation costs.

Third, in the case of the prior art, as a method of injecting the filtration filter into the precoat tank, the filter is manually added through a sack packed with the filtering filter, or the vibrator, the elastic member, the feeder, and the like, as in No. 0440876. There was an automatic input device used, but it required a complicated and expensive equipment, there was a problem that takes a lot of installation cost.

The present invention was created to solve the problems of the prior art as described above, and the purpose of the pressure precoat filtration device using the filtration filter according to the present invention is a filtration filter coating layer and a filter filter coating layer attached to the surface of the filter filter. Filter filter that is suitable to prevent clogging of the filter by first applying the desorption method using the difference between the differential pressure raised inside the filter tower and the external atmospheric pressure due to the sludge layer attached. It is to provide a pressure precoat filter device used.

Another purpose of the pressure precoat filtration device using the filter medium according to the present invention is to filter air coating layer attached to the filter filter by injecting compressed air into the reverse stripping tube installed at the lower end of the filter tower before performing the backwashing process The present invention provides a pressure type precoat filtration device using a filtration filter, which is suitable for allowing the sludge layer to be detached smoothly and efficiently.

Another object of the pressure precoat filtration device using the filter medium according to the present invention is to efficiently desorb the filtration filter coating layer and the sludge layer by injecting compressed air into the reverse releasing tube, so that the filtration process A pressure precoat filtration device using a filtration filter that can delay the rise of the differential pressure, prevent clogging of the filtration filter, and reduce the maintenance cost by increasing the filtration time. To provide.

Another object of the pressure type precoat filtration device using the filter medium according to the present invention is to provide an upper precoat tube for generating a vortex by the discharge water of the filtration pump in the lower end of the precoat tank, so that the filtration filter is uniform. It is to provide a pressure precoat filtration device using a filtration filter to be mixed so that the coating layer to be pre-coated with a filter filter on the outer surface of the filter filter by the filtration pump can be made densely.

Another object of the pressure type precoat filtration device using the filter medium according to the present invention is to reduce the installation cost by automatically introducing the filter medium into the precoat tank by the configuration of the filter filter automatic injection device having a simple configuration. The present invention provides a pressure precoat filtration device using a filtration filter suitable for use.

Pressure type precoat filtration device using the present invention filter filter for achieving the above object, the filter filter automatic dosing device for inputting the filter filter, and the filter filter added from the filter dosing automatic input device for mixing with water The raw water inflow water tank by a precoat water tank, a raw water inflow water tank into which raw water to be filtered and purified is introduced and stored, and a raw water inflow pipe connected to the precoat water tank by a lower precoat pipe and branched from the lower precoat pipe. And a plurality of filtration filters pre-coated by the filtration filter introduced from the precoat tank to filter sludge contained in the raw water introduced from the raw water inflow tank. The filtration tower to purify and the filtered water filtered and purified by the filtration tower are introduced through the filtration water pipe. A filtered preservation tank, an upper precoat pipe branched from the filtered water pipe and connected to the precoat water tank to circulate the precoated water in the filtration tower to a precoat water tank, and an air spray pipe. An air compression tank connected to the upper side of the filter tower, for storing the compressed air received from the air compressor and spraying the high pressure air for backwashing by the air injection, and a sludge discharge pipe under the filter tower. A sludge storage tank connected to the filter filter coating layer and a sludge layer desorbed by the high pressure air injected from the air compression tank, and a sludge storage tank provided in the lower precoat pipe, and the filter filter of the precoat tank. And a mixture of water and a filtration pump for forcibly transferring the raw water of the raw water inlet tank to the filtration tower, respectively. A pressure precoat filtration device using a filtration filter comprising: branching from the upper precoat pipe to detach the filtration filter coating layer and the sludge layer attached to the filtration filter inside the filtration tower after performing the filtration process. And an air bleed pipe located above the precoat tank so that the inlet is exposed to the outside air.

Pressure precoat filtration device using the present invention filter filtration having the configuration as described above has the following effects.

First, due to the configuration of the air bleed pipe, the liquid phase due to the difference between the differential pressure that is raised inside the filtration tower due to the filtration filter coating layer attached to the outer surface of the filter filter and the sludge layer attached to the surface of the filter filter coating layer and the atmospheric pressure of the outside The sludge can be easily detached, and as a result, the clogging phenomenon of the filter can be effectively prevented.

Second, before performing the backwash process, compressed air is injected through the reverse desorbing tube, and the injected compressed air generates an air whirlwind inside the filter tower, and the air whirlwind rises from the bottom of the filter tower to the top, and filters the filter while shaking the filter. The filter filter layer and sludge layer adhering to the outside of the filter can be removed easily. As a result, the effect of delaying the increase of the differential pressure inside the filter tower during the filtration process and the clogging phenomenon of the filter filter Preventive effect occurs, and eventually, the overall filtration time is increased, thereby reducing the maintenance cost.

Third, in the precoating process, the upper precoat tube is submerged into the inner lower end of the precoat tank to generate vortices by the discharge water of the filtration pump inside the precoat tank, thereby simplifying the filtering filter and the water without additional installation cost. There is an effect that can be mixed uniformly, and as a result there is an effect that the coating layer pre-coated with a filtration filter on the outer surface of the filtration filter by the filtration pump can be made densely.

Fourth, by the automatic configuration of the filtration filter automatic injection device of a simple configuration by the automatic injection of the filtration filter into the precoat tank, there is an effect that can reduce the installation cost.

The following will be described in detail with reference to the accompanying drawings, preferred embodiments of a pressure precoat filtration device using a filtration filter of the present invention.

First, the filtration inhibitor used in the pressure precoat filtration device using the filtration filter according to the present invention reveals that there are no restrictions on the type of diatomaceous earth, activated carbon, cellulose, zeolite, and backlight.

2 is a block diagram of a pressure precoat filtration device using a filtration filter according to an embodiment of the present invention, Figure 3 is a block diagram of the automatic filtration filter injection device in FIG.

As shown in Figure 2, the pressure precoat filtration device using a filter medium according to an embodiment of the present invention, the filter filter automatic dosing device 20 for introducing a filter filter, and the filter filter automatic dosing device ( 20) a precoat tank 30 for mixing the filtered filter introduced from 20 with water, a raw water inflow tank 10 into which raw water to be filtered and purified is introduced and stored, and a lower precoat tube P2. 30 is connected to the raw water inflow water tank 10 by the raw water inflow pipe (P1) branched from the lower precoat pipe (P2), by the filter filter introduced from the precoat water tank (30) A pre-coated filtration filter is provided in plural inside, and the filtration tower 40 for filtering and purifying sludge contained in the raw water introduced from the raw water inflow water tank 10, and the filtration tower ( Filtration and Filtration by 40) Filtration water tank 15 for receiving and storing water through the filtered water pipe (P4), and branched from the filtered water pipe (P4) and connected to the precoat water tank (30) in the filter tower (40) The upper precoat pipe (P3) and the air spray pipe (P6) to allow the water after the pre-coating process to be circulated to the precoat tank (30) and received from the air compressor received from the air compressor An air compression tank 55 for injecting high pressure air for backwashing by air injection after storing compressed air and a sludge discharge pipe P5 connected to the lower side of the filtration tower 40 are connected to the air compression. Sludge storage tank 50 for storing the liquid sludge formed of the filter filter coating layer and the sludge layer separated by the high pressure air injected from the tank 55, and the lower precoat pipe (P2) is provided in the precoat water tank ( 30) Filtrate and water horn In the pressure precoat filtration device using a filtration filter comprising a filtration pump 35 for forcibly transferring water and raw water of the raw water inflow water tank 10 to the filtration tower 40, after performing the filtration process In order to detach the filtration filter coating layer attached to the filtration filter inside the filter tower 40 and the sludge layer filtered by the filter filter coating layer, branched from the upper precoat pipe (P3) and the inlet is exposed to the outside air. It characterized in that it further comprises an air bleed pipe (P8) located above the precoat water tank (30).

The precoat water tank 30, the raw water inlet water tank 10, the lower precoat pipe P2, the raw water inlet pipe P1, the filtration tower 40, the filtration water pipe P4, and the filtration water treatment tank 15 Since the air compression tank 55, the sludge storage tank 50, and the filtration pump 35 are the same as those of the conventional art and are described above, detailed descriptions thereof will be omitted.

By the configuration of the air bleed pipe (P8), the sludge is attached to the outer surface of the filter filter coating layer and the filter filter coating layer due to the incoming raw water to form a sludge layer is raised inside the filter tower 40, There is an effect that can be removed by the difference between the differential pressure and the external atmospheric pressure.

In addition, the air bleed pipe (P8) is to remove the air while circulating naturally during the operation of the filtration pump 35 for the formation of the filter filter coating layer, so that the air is mixed in the gap of the filter pump or connecting pipe when the filter filter is operated. In the case of being introduced into the filter tower to prevent the formation of the filter medium coating layer on the outer surface of the filter filter.

That is, the air bleeding pipe (P8) is generated in the process of sufficiently mixing the filtration filter and water and is generated in the forced transport of the filtration pump has a huge effect on the smooth coating of the filtration filter to the filter installed in the filter tower. The state also acts to drain the entrained air.

Pressure precoat filtration device using a filter filter according to an embodiment of the present invention, after the filter filter and the sludge is first detached by the action of the air bleed pipe (P8), the filtration before performing the backwashing process Reverse desorption pipe branched from the air injection pipe P6 and connected to the lower side of the filtration tower 40 so as to blow the compressed air upward from the bottom of the tower 40 so that the filtration filter and the sludge can be detached secondaryly. P7) and the valve (V7) is provided in the reverse side desorption tube (P7) to control the flow of compressed air flowing through the reverse desorption tube (P7) is characterized in that it further comprises.

By injecting compressed air into the reverse desorption pipe (P7) installed at the lower end of the filtration tower (40) before the backwashing process, the filtration filter is shaken by the air whirlwind formed by the injected compressed air, and as a result, inside the filtration tower (40). The filtration filter layer and the sludge layer (that is, liquid sludge) adhered to the surface of the filtration filter are separated off smoothly.

Pressure precoat filtration device using a filter filter according to an embodiment of the present invention, the filter filter which is a filter filter introduced into the precoat water tank 30 by the filter filter automatic injection device 20 and water is mixed uniformly In order to be, the upper precoat pipe (P3) is settled to the inner lower end of the precoat tank 30 is characterized in that to form a vortex inside the precoat tank (30).

By submerging the upper precoat pipe (P3) to the inner lower end of the precoat tank 30 as described above and by forming a vortex into the precoat tank 30 by the water discharged during the precoating process, by a simple configuration There is an advantage that can be uniformly mixed with water and the filter medium, as a result there is an advantage that can reduce the installation cost.

In the pressure precoat filtration device using a filter filter according to an embodiment of the present invention, as shown in Figure 3, the filter filter automatic dosing device 20 is formed at the lower end of the filter filter is a filter filter The hopper 21 and the hopper 21 and the vertical direction of the hopper 21 are rotated and the stirring screw 22a is integrally formed so that the filter filter stored in the hopper 21 is stored through the discharge port. A stirring shaft 22 to be supplied to the precoat water tank 30, a motor 23 installed above the hopper 21 and axially coupled to the stirring shaft 22 to rotate the stirring shaft 22; In order to prevent a bridge phenomenon occurring in the hopper 21 in the process of supplying the filter filter stored in the hopper 21, the inclined downward bending after being formed in the transverse direction perpendicular to the stirring shaft 22 Is formed by extending the brake (b Reaker (24), and the hopper 21 to prevent the water generated while stirring in the precoat tank 30 and the water vapor naturally evaporated into the hopper 21 through the discharge port, The cover 25 for opening and closing the discharge port of the, and the pneumatic cylinder 26 is provided on the outside of the hopper 21 to control the opening and closing of the cover 25 is characterized in that it comprises a.

When the filter filter is introduced by the configuration of the cover 25 and the pneumatic cylinder 26, the cover 25 is opened, and when the filter filter is not added, the cover 25 is closed to close the water in the precoat tank 30. There is an advantage that can prevent the phenomenon of the filter medium is hardened by evaporation.

In addition, the bridge phenomenon is a phenomenon in which the filtration filter stays on the inner circumferential surface of the hopper 21 without being discharged well when the hopper 21 has a large capacity, as known before the application of the present application, and the brake 24 ) Is a configuration for preventing such a bridge phenomenon.

The following describes the operation of the pressure precoat filtration device using the present invention filter filtration having the configuration as described above.

First, the process of automatic filtering by the filtering filter automatic dosing device 20 will be described.

The cover 25 is opened by the driving of the pneumatic cylinder 26, the stirring shaft 22 is rotated by the driving of the motor 23 while the cover 25 is open, and the filtration filter is transferred to the precoat tank 30. Supply.

After the filtration filter is supplied to the precoat water tank 30, the cover 25 is closed by the operation of the pneumatic cylinder 26 to prevent the filtration filter inside the hopper 21 from hardening.

In addition, a cylinder control device (not shown) for operating the pneumatic cylinder 26 is provided as a matter of course.

The following describes the filtration and purification process according to the present invention. Detailed description of the same process as in the prior art will be omitted.

1. Precoating Process

First, in the precoat tank 30, the valve V2 and the valve V3 are opened (of course, all the remaining valves are closed) while the highest water level is maintained by the level switch L / S, and then the filtration pump 35 is opened. Drive to supply water to the filtration tower 40 to fill the filtration tower 40, the water supplied by the upper precoat pipe (P3) forms a vortex, the filtration filter injected by the filtration filter automatic injection device 20 And mix the water evenly.

The filter medium and water mixed as described above are mixed and supplied to the filtration tower 40 through the lower precoat tube (P2) to perform a precoating process.

2. Filtration Process

As described above, the filtration filter coating layer is formed on the filtration filter, and then the filtration process is performed.

In order to perform the filtration process, the valve V1 and the valve V4 are sequentially opened and the valve V2 and the valve V3 are closed. The reason for opening and closing the valve in the same order as above is to prevent the coating layer precoated with the filtering agent from being broken by the water hammer phenomenon.

As described above, the inflow source water is introduced into the filtration pump 35 while the valves V1 and V4 are opened, and then discharged into the filtration tank 15.

As the sludge contained in the generated influent water is filtered by the pre-coated filter filter coating layer, the pressure inside the filter tower increases, and when the pressure gauge (not shown) provided in the filter tower 40 indicates the maximum value, the filtration pump 35 stops. And open valves V1 and V4 are closed.

3. First Tally Process

When the filtration process is completed, the valve V3 is opened.

When the valve (V3) is opened, the external air is rapidly sucked through the air bleed pipe (P8) and the upper precoat pipe (P3) due to the differential pressure inside the filtration tower 40, the filtration is coated on the surface of the filtration filter The filtrate coating layer and the sludge layer (ie liquid sludge) are desorbed.

The principle that the filtration filter coating layer and the sludge layer as described above is detached by the differential pressure.

As a result of the filtration process, a sludge layer is formed on the surface of the filtration filter to increase the differential pressure inside the filtration tower (ie, the filtration filter and the upper precoat pipe P3 maintain atmospheric pressure (ie, low pressure), but the filtration is performed). Since the inside of the tower is maintained at a high pressure by the filtration filter coating layer and the sludge layer, the differential pressure inside the filtration tower is increased). The differential pressure inside the filtration tower causes the outside air at atmospheric pressure to drain the air vent pipe (P8). It is rapidly sucked into the filter tower 40 through the filter filter coating layer and the sludge layer is detached.

4. Second Tally Process

The secondary desorption process is a process for desorption of the filtration filter coating layer and the sludge layer that did not fall off during the primary desorption process.

Open the valve (V7) while the valve (V3) is open to force the compressed air through the reverse desorption pipe (P7), the compressed air forced into the lower side of the filter tower to generate an air whirl generated in the filter Desorption of the sludge layer which has not been removed is completed again.

By injecting compressed air into the reverse desorption pipe (P7), the filtration filter coating layer and the sludge layer remaining on the outer surface of the filtration filter after the first desorption process are raised from the bottom of the filtration tower to the top by the air whirl caused by the compressed air. Shake to detach.

By the secondary desorption process, the sludge remaining in the filtration filter is most efficiently desorbed, which has the advantage of delaying the increase of the differential pressure inside the filtration tower during the filtration process and preventing clogging of the filtration filter. As the filtration time is increased, maintenance costs are eventually reduced.

5. Backwashing Process

It is a process for discharging the liquid sludge formed of the filtration filter coating layer and the sludge layer desorbed in the first and second desorption process and to remove the fine sludge layer remaining in the filtration filter.

Sludge storage tank (50) of liquid sludge formed by the filtration filter coating layer and the sludge layer in the filter tower by inserting compressed air in a repetitive operation of closing the valve (V3, V7) and opening the valve (V6) in the state of opening the valve (V5). To be discharged.

The embodiment of the present invention is just one embodiment of the technical idea of the present invention, and in the person skilled in the art, other modified embodiments are possible within the technical idea of the present invention.

1 is a block diagram of a pressure precoat filtration device using a filtration filter according to the prior art.

Figure 2 is a block diagram of a pressure precoat filtration device using a filtration filter according to an embodiment of the present invention.

FIG. 3 is a block diagram of the automatic filtration filter injection device of FIG. 2.

          Explanation of symbols on the main parts of the drawings

10; Raw water inlet tank 15; Filtration tank

20; Filter filter automatic feeding device 21; Hopper

22; Stirring shaft 22a; Stirring Screw

23; Motor 24; brake

25; Cover 26; Pneumatic cylinder

30; Precoat water tank 35; Filtration Pump

40; Filtration tower 50; Sludge storage tank

55; Air compression tanks P8; Air vent

P7; Reverse tally tube

Claims (4)

Filtration filter automatic dosing device 20 to inject diatomaceous earth, A precoat water tank 30 for mixing the filtration filter fed from the filtration filter automatic dosing device 20 with water; Raw water inflow water tank (10) to store and store the raw water to be filtered and purified, It is connected to the raw water inlet water tank 10 by the raw water inlet pipe (P1) is branched from the lower precoat pipe (P2) by the lower precoat pipe (P2), the A plurality of filtration filters pre-coated by the filtration filter introduced from the precoat tank 30 are provided therein to filter sludge contained in the raw water introduced from the raw water inflow water tank 10. A filtration tower 40 for purifying by A filtration water tank 15 for receiving and storing filtration water filtered and purified by the filtration tower 40 through a filtration water pipe P4; The upper precoat pipe branched from the filtration water pipe (P4) and connected to the precoat tank (30), so that the water subjected to the precoating process in the filtration tower (40) is circulated to the precoat tank ( P3), An air compression tank connected to the upper side of the filter tower 40 by an air injection pipe (P6), and stores the compressed air received from the air compressor to inject high-pressure air for backwashing by air injection ( 55) and, The sludge is connected to the lower side of the filter tower 40 by the sludge discharge pipe (P5), the sludge for storing the liquid sludge formed of the filter filter coating layer and the sludge layer desorbed by the high pressure air injected from the air compression tank (55). Reservoir 50, It is provided in the lower precoat pipe (P2), the filtration pump for forcibly conveying the mixture of the filtration filter and the water of the precoat water tank 30 and the raw water of the raw water inlet water tank 10 to the filtration tower 40, respectively ( In the pressure precoat filtration device using a filtration filter comprising 35): In order to detach the filtration filter coating layer and the sludge layer attached to the filtration filter inside the filtration tower 40 after performing the filtration process, the precoat tank branched from the upper precoat pipe P3 and the inlet is exposed to the outside air. Pressure precoat filtration device using a filtration filter, characterized in that it further comprises an air bleed pipe (P8) located above the (30). The method according to claim 1, After the primary filter and the sludge is first desorbed by the action of the air bleed pipe (P8), by blowing the compressed air up from the bottom of the filter tower 40 before performing the air backwashing process, the filtered filter and the sludge 2 In order to be detached by the car, the reverse branch pipe (P7) and branched from the air injection pipe (P6) connected to the lower side of the filter tower 40, A pressure precoat using a filtering filter, further comprising a valve (V7) provided in the reverse desorption pipe (P7) to control the flow of compressed air flowing through the reverse desorption pipe (P7). Filtration device. The method according to claim 2, The upper precoat tube (P3) is the precoat tank (30) so that the filtration filter, which is the filtration filter introduced into the precoat water tank (30) by the filtration filter automatic injection device (20), can be uniformly mixed. The pressure precoat filtration device using a filtration filter, characterized in that the immersion is installed in the inner lower end of the precoat tank 30 to form a vortex inside. The method of claim 3, wherein the filter medium automatic dosing device 20, A hopper 21 having a discharge port formed at a lower end thereof, and storing a filtration filter which is a filtration filter; It is installed to rotate up and down in the longitudinal direction of the hopper 21 and the stirring screw 22a is integrally formed to supply the filtration filter stored in the hopper 21 to the precoat tank 30 through the discharge port. Stirring shaft 22; A motor (23) installed above the hopper (21) and axially coupled to the stirring shaft (22) to rotate the stirring shaft (22); In order to prevent the bridge phenomenon occurring in the hopper 21 in the process of supplying the filter medium stored in the hopper 21, the inclined downward bent after being formed in the transverse direction perpendicular to the stirring shaft 22 Extended breakers 24; Cover for opening and closing the discharge port of the hopper 21 to prevent the water generated while stirring in the precoat water tank 30 and the water vapor naturally evaporated into the hopper 21 through the discharge port ( 25); Pressure precoat filtration device using a filtration filter, characterized in that it comprises a pneumatic cylinder (26) which is installed on the outside of the hopper 21 to control the opening and closing of the cover (25).

Images