KR19980018113A - Wastewater Cleaning Method and Apparatus - Google Patents

Abstract

The present invention relates to a method and apparatus for washing waste water, which can further improve cleaning by filtering waste water through a plurality of filtration units, and automatically performs backwashing when the pressure in the filtration tank rises due to clogging of the filtration unit. It is therefore an object of the present invention to provide a method and apparatus for washing waste water which can prevent clogging of the filtration unit.

To this end, the present invention is in communication with the waste water storage tank, the filter tank for filtering the waste water is coupled to a plurality of covers detachably, and the filtration due to the clogging of the plurality of filtration unit and the filter provided inside the filtration tank. When the pressure in the tank is greater than the set pressure consists of a backwash unit for introducing air into the filtration tank to backwash the waste water.

Description

Wastewater Cleaning Method and Apparatus

The present invention relates to a wastewater washing method and apparatus, and more particularly, to a wastewater washing method and apparatus for cleaning wastewater by introducing the wastewater cyclone sedimentation storage tank (hereinafter, abbreviated as wastewater storage tank) into a filtration tank. will be.

1 is a configuration diagram schematically showing a conventional wastewater washing apparatus.

As shown in the drawing, the conventional wastewater washing apparatus includes a wastewater storage tank 10 in which wastewater is stored, a filtration tank 12 provided at an upper portion of the wastewater storage tank 10, and the wastewater storage tank. Raw water supply pipe (18) provided on one side of the (10) having an electric valve 16 for supplying water into the wastewater storage tank (10) through the raw water pump (14), and the filtration tank (12) to clean the wastewater Filtration tank through the filter medium layer 20 provided in the inside, the screen net 22 which is located above the filter layer layer 20 and fixedly installed at the upper end of the filter tank 12, and the waste water storage tank 10. The high speed impeller 24 is installed at the lower end of the filtration tank 12 so that the water flowing into the water 12 can be rotated at high speed to be directed toward the filter media layer 20. Impeller motor driving unit 28 to rotate and the upper end of the filtration tank 12 is installed in communication with the filter media layer 20 and the drain pipe 30 for discharging the washing water filtered through the screen net 22 to the outside.

The conventional wastewater washing apparatus configured as described above is supplied with water into the wastewater storage tank 10 when the raw water pump 14 is operated by a controller (not shown). At the same time, the motor driving unit 28 is operated to rotate the high speed impeller 24 and water is introduced into the wastewater storage tank 10. The introduced water is again sent to the upper part of the filtration tank 12 by the high speed impeller 24, and the water sent to the upper part by the high speed impeller 24 passes through the media layer 20, and then screen screen ( It is discharged to the outside through the drain pipe 30 through 22).

The conventional wastewater cleaning device configured as described above has a structure for cleaning the wastewater through the dual structure of the filter medium layer and the screen net, and there is a problem in that the dual structure does not properly clean very fine particles.

In addition, since the flocculant must be used separately to improve cleaning, it is cumbersome to use and requires a considerable cost, and a high-speed impeller drive motor must be employed to send water introduced into the filtration tank to the high pressure. There is a problem that increases.

The present invention has been made to solve the above-described problems, the present invention can improve the cleaning by filtering the waste water through a plurality of filtration means, automatic when the pressure in the filtration tank is increased due to clogging of the filtration means It is an object of the present invention to provide a method and apparatus for washing waste water which can prevent clogging of filtration means by performing backwashing.

In order to achieve the above object, the present invention, in the waste water cleaning apparatus for cleaning the waste water stored in the waste water storage tank, the waste water storage tank is in communication with the filtration to remove the waste water is coupled to a plurality of covers to be detachable A tank, a plurality of filtering means provided inside the filtering tank, and backwashing means for backwashing the waste water by introducing air into the filtering tank when the pressure in the filtering tank becomes larger than the set pressure due to the clogging of the filtering means. Provided is a waste water washing apparatus, characterized in that.

According to another aspect of the present invention, there is provided a wastewater cleaning method for cleaning wastewater stored in a wastewater storage tank by passing it into a filtration tank, the method comprising: filtering wastewater of a wastewater storage tank, and draining the filtered wastewater outside the filtration tank. A step of comparing the pressure in the filtration tank with a set pressure, and a backwashing step of backwashing and backwashing water in the filtration tank when the pressure of the filtration tank becomes greater than the set input, and filtration of the waste water after backwashing. Wastewater cleaning method consisting of a step of restarting.

1 is a schematic view showing a conventional wastewater washing apparatus.

2 is a flow chart for explaining the operation of the present invention.

3 is a flow chart for explaining the reverse cleaning operation of the present invention.

Figure 4 is a schematic view showing a waste water washing apparatus of the present invention.

Figure 5 is a side cross-sectional view showing a waste water washing apparatus of the present invention.

Figure 6 is a plan view showing a reinforcing member installed on the upper surface of the microparticle filtration member of the present invention.

7 is an enlarged view of main portion excerpt 5;

8 is a plan view showing a scraper support of the present invention.

** Description of symbols for the main parts of the drawing **

100. Filtration tank 110. Lower cover

120. Middle cover 130. Top cover

210. First screen mesh member 220. Second screen mesh member

230. Fine particle filtering member 250. Reinforcing member

310. Pressure sensing unit 320. Air inlet pipe

330. Waste discharge pipe 340. Automatic drainage pipe for freeze protection

410. First motor drive unit 420. Turbulent impeller

430. Impeller for stirring the media layer 510. The second motor drive unit.

520. Scraper Support 530. Scraper

542. Hanging jaw 544. Stopper

546. Coil Spring 548. Tightening Nut

550. Watertight members

Hereinafter, with reference to the accompanying drawings will be described a preferred embodiment of the present invention;

2 is a flow chart for explaining the operation of the present invention, Figure 3 is a flow chart for explaining the reverse washing operation of the present invention, Figure 4 is a schematic view showing the wastewater washing apparatus of the present invention, Figure 5 Figure 6 is a side cross-sectional view showing a waste water cleaning device of the present invention, Figure 6 is a plan view showing a reinforcing member installed on the upper surface of the microparticle filtration member of the present invention, Figure 7 is an enlarged view of the excerpt of the main portion 5, Figure 8 It is a top view which shows the scraper support of this invention. In the description of the present invention, the same components as in the prior art are given the same reference numerals.

First, as shown in FIG. 4 and FIG. 5, the present invention communicates with the waste water storage tank 10 and is detachably attached to a plurality of covers, that is, a lower cover 110, an intermediate cover 120, and an upper cover 130. Filtration tank 100 is formed, and each cover 110, 120, 130 is fixed to each other by a conventional fastening means, for example, a screw 108.

The inner bottom cover 110 of the filtration tank 100 is provided with a first screen mesh member 210 horizontally, the upper portion of the middle cover 120 is provided with a second screen mesh member 220, the upper The cover 130 is provided with a fine particle filtration member 230. Here, the fine particle filtration member 230 is preferably formed of a ceramic plate or a metal sintered plate.

The first and second screen mesh members 210 and 220 and the fine particle filtration member 230 are respectively fixed to inner walls of the filtration tank 100 by fixing means. The fixing means may be fixed to the inner wall of the filtration tank 100 so as to support both front ends of the first and second screen mesh members 210 and 220 and the microparticle filtration member 230, respectively. 242 is fixed, the fixing bracket 242 through the upright fastening bolt 244 is coupled thereto, the fastening nut 246 is coupled to the front end of the fastening bolt 244 is coupled.

6, the reinforcing member 250 is installed on the upper surface of the microparticle filtration member 230, thereby preventing the microparticle filtration member 230 from being deformed by water pressure in the filtration tank 100 during cleaning. It is supposed to be done.

The filtration tank 100 is filtered when the pressure in the filtration tank 100 becomes greater than the set pressure due to clogging of the first and second screen mesh members 210 and 220 and the fine particle filtration member 230. The air is introduced into the tank 100 so as to backwash the wastewater.

First, as shown in FIG. 4 and FIG. 5, the pressure sensing unit 310 is installed at the bottom of the first screen mesh member 210 and at the same time the outer side of the lower cover 110 of the filtration tank 100 is filtered. It is to sense the pressure in the tank (100). And the upper cover 130 of the filtration tank 100 is provided with an air inlet pipe 320 having an electric valve 322 in communication with it, the lower part of the waste water storage tank 10 so that the waste water is discharged when backwashing A waste discharge pipe 330 having an electric valve 332 in communication with the drain pipe 30 is provided. Here, at the bottom end of the wastewater storage tank 10, it is preferable to install an automatic drainage pipe 340 for preventing freezing and communicating with the waste discharge pipe 330 in order to prevent freezing during the winter season.

In addition, the first and second screen members 210 may be easily discharged through the waste discharge pipe 330 when the wastes attached to the lower surfaces of the respective filtering members 210, 220, 230 are backwashed. ) 220 and the fine particle filtration member 230 is preferably used for each of the small eye member sequentially.

On the other hand, in order to prevent the clogging of the first screen mesh member 210 described above, the filtration tank 100 is provided with a first motor driver 410 on the outside of the lower cover 110, the first screen mesh member ( The turbulent impeller 420 is fixed to the drive shaft 412 of the first motor driving unit 410 at a position proximate to the upper surface of the 210, and the turbulent impeller 420 is the first screen net member 210. It is to serve to send the water flow remaining on the upper surface of the first screen net member 210 to the upper surface.

The impeller 430 for filtering the media layer is fixed to the tip of the driving shaft 412 of the first motor driving unit 410 so as to be spaced apart from the turbulent impeller 420 by a predetermined distance. The filter layer stirring impeller 430 stirs the filter layer 20 and at the same time sends the water flow above the turbulent impeller 420 to the filter layer 20 which is the secondary filtering member, and the filter layer 20 is the filter medium. It serves to prevent falling down the impeller 430 for bed stirring.

In addition, as shown in FIG. 7, in order to prevent clogging of the microparticle filtration member 230 described above, the filtration tank 100 is provided with a second motor driving part 510 outside the lower cover 110. The scraper support 520 is installed at the tip of the drive shaft 512 of the second motor driving unit 510 positioned between the fine particle filtration member 230 and the second screen mesh member 220. At least one scraper 530 for cleaning the lower surface of the fine particle filtration member 230 is fixed to the upper surface by a conventional fastening member. Here, the scraper support 520 is made of stainless steel, the scraper 530 is preferably formed of a soft rubber material, for example, urethane rubber. As shown in FIG. 6, the scraper 530 is fixed to the upper surface of the scraper support 520 by a screw.

On the other hand, in order to elastically couple the scraper support 520 to the drive shaft 512 of the second motor driver 510 is configured as follows. First, as illustrated in FIG. 5, a locking jaw 542 is provided at a central portion of the scraper support 520 into which the rotation shaft 521 of the second motor driving unit 510 is fitted. The stopper 544 is positioned to face the latching jaw 542 at a predetermined distance downward, and at the same time, the stopper 544 is movable upward and downward to the distal end of the drive shaft 512 of the second motor driver 510. A coil spring 546 is interposed between the locking jaw 542 and the stopper 544, and the coil spring 546 provides elastic force to the scraper support 520 so that the scraper support 520 can flow up and down. It is supposed to be. In addition, the fastening nut 548 is coupled to the driving shaft 512 of the second motor driver 510 to support the stopper 544 upward. A watertight member 550 is provided in the gap formed between the drive shaft 512 of the second motor driving unit 510 and the fine particle filtration member 230 to seal it. The rotational force is transmitted to the inner side of the driving shaft 512 of the second motor driver 510 inserted through the locking jaw 542 and the locking jaw 542 of the scraper support 520 in surface contact with the driving shaft 512. It is preferable that the locking projections 512a and the locking grooves 542a are formed to facilitate this.

Reference numeral 562 (shown in FIG. 4) shows an electric valve connecting the drain pipe 30 and the waste discharge pipe 330, respectively.

The operation of the present invention configured as described above is as follows.

First, as shown in FIGS. 2 and 3 and 4, the wastewater in the wastewater storage tank 10 is introduced into the filtration tank 100 and the introduced water (wastewater) is filtered through the filtering members 210 and 220 ( 230 is filtered through (S 600). The filtered water is drained to the outside of the filtration tank 100 through the drainage pipe 30 (S 610), and the pressure in the filtration tank 100 during the filtration operation is compared with the set pressure value (620). When the pressure of the filtration tank 100 is greater than the set pressure by the compared signal value, the filtration of the water is stopped and the water in the filtration tank 100 is flowed back to wash back (S 630). After backwashing, filtration of waste water is resumed (S640).

When the above-described reverse cleaning step (S 630) will be described in more detail, the pressure sensing unit 310 detects the pressure in the filtration tank 100 (S 632) and is detected by the pressure sensing unit 310. The control unit blocks the cleaning pipes 16 and 30 by the signal value and opens the reverse cleaning pipes 322 and 330 to introduce air into the filtration tank 100 (S 634). By the atmospheric pressure of the waste is discharged to the outside through the back washing pipe 320, 330 (S 636).

More specifically, as illustrated in FIGS. 4 and 5, the raw water pump 14 is operated by the control unit and the electric valve 16 is opened to move the arrow (solid line) direction into the waste water storage tank 10. Thus water enters. The water introduced into the wastewater storage tank 10 is mixed with the wastewater, and the wastewater mixed with the water passes through the first screen net member 210 through the lower cover 110 of the filtration tank 100. Tea is filtered.

At the same time, the first motor driving unit 410 is operated to rotate the impeller 420 for turbulence and the impeller 430 for stirring the media layer at low speed. Here, a part of the water passing through the first screen mesh member 210 is sent to the upper surface direction of the first screen mesh member 210 by the vortex impeller 420 and the rest to the filter layer stirring impeller 430 Is sent above the filtration tank 100.

That is, the eddy current impeller 420 serves to remove the dirt adhering to the bottom surface of the first screen mesh member 210, and the medial layer agitation inpeller 430 is the first screen mesh member 210. The turbulent water passing through the) serves to send to the filter medium layer (20).

The water sent by the filter medium stirring impeller 430 is subjected to secondary filtration through the filter medium layer 20, which is a secondary filter medium, and further filtered through the second screen mesh member 220.

Here, the first screen mesh member 210 installed in the lower cover 110 of the filtration tank 100 prevents large wastes from flowing into the filtration tank 100, and the middle cover 120 of the filtration tank 100. The second screen mesh member 220 installed in the) not only filters the water in the filtration tank 100 but also prevents the filter medium layer 20 from being discharged into the drain pipe 30.

Water passing through the second screen mesh member 220 is filtered again while passing through the fine particle filtration member 230, and the final filtered water, that is, the washing water is treated with external washing water through the drainage pipe 30. Go to the tank

The above-described scraper support 520 is rotated at a low speed by the second motor driving unit 510 to remove the dirt stuck to the lower surface of the fine particle filtration member 230 through the scraper 530 installed on the upper surface thereof. do.

On the other hand, when the waste of the filtration member 210, 220, 230 is clogged by the waste during the cleaning process of the waste water is difficult to clean the waste water, the pressure of the waste water storage tank 10 and the filtration tank 100 is Gradually rises.

At this time, the pressure sensing unit 310 detects the rising pressure of the filtration tank 100, and thus the control unit stops the operation of the raw water pump 14 and the first and second motor driving units 410 and 510. The pipes 18 and 30 are blocked. As the electric valve 312 of the air inlet pipe 320 is opened, as shown by an arrow (virtual line) in FIG. 2, air is introduced into the filtration tank 100, and at the same time, a timer (not shown) is operated to filter. The waste is discharged completely to the outside through the waste discharge pipe 330 together with a predetermined amount of water in the tank 100.

When the discharge of the waste is completed and the pressure of the filtration tank 100 is returned to the set pressure, the controller drives the raw water pump 14, the first motor driver 410, and the second motor driver 510. The electric valves 322 and 333 are shut off, and the pipes 18 and 30 are opened to resume washing of the waste water. By repeating the above-described operation, the waste water is washed and backwashed.

The present invention is not limited to the above-described embodiments and can be variously modified within the scope of the technical details of the present invention.

As described above, according to the present invention, the fine waste water is filtered through the first screen net member, the media layer, the second screen net member, and the fine particle filtration member.

In addition, the use of a scraper and a vortex impeller prevents clogging of the fine particle filtration member and the screen net member, and does not require a large power by using a low speed drive motor, and greatly reduces the power and installation costs.

In addition, when clogging occurs due to prolonged washing operation and the pressure in the filtration tank is increased, the pressure sensing unit may conveniently carry out reverse washing by detecting a pressure increase.

In addition, since the filtration tank is divided into an upper cover, an intermediate cover, and a lower cover, it is very easy to replace the screen net member, the media layer, and the fine particle filtration member.

Claims (12)

In the waste water cleaning device for cleaning the waste water stored in the waste water storage tank, A filtration tank communicating with the waste water storage tank and being coupled to a plurality of covers to be detachable to filter the waste water; A plurality of filtration means provided inside the filtration tank; And And a backwashing means for backwashing the wastewater by introducing air into the filtration tank when the pressure in the filtration tank becomes larger than the set pressure due to the clogging of the filtration means. The method of claim 1, wherein the filtering means comprises a first filtration means provided in the lower end of the filtration tank; Third filtration means for re-filtering the wastewater filtered through the first filtration means and the second filtration layer; And And a fourth filtration means for final filtering the waste water and draining it to the outside through a drain pipe. The method of claim 2, wherein the first filtration means is a first screen net member installed transversely to the lower cover of the filtration tank; And Waste water washing apparatus comprising a fixing means for fixing the first screen mesh member to the inner wall of the filtration tank. According to claim 3, wherein the third filtration means is a second screen net member installed transversely to the upper end of the middle cover of the filtration tank; And Waste water cleaning device comprising a fixing means for fixing the second screen mesh member to the inner wall of the filtration tank. The method of claim 4, wherein the fourth filtration means is fine particle filtration member which is installed laterally on the upper cover of the filtration tank at a predetermined distance from the second screen mesh member; And Waste water cleaning device, characterized in that the fixing means for fixing the fine particle filtration member to the inner wall of the filtration tank. 6. The apparatus of claim 5, wherein the reverse cleaning means comprises: a pressure sensing unit positioned at a lower portion of the first screen mesh member and installed outside the lower cover of the filtration tank to sense pressure in the filtration tank; An air inlet pipe provided in communication with an upper cover of the filtration tank and having an electric valve through which air is introduced during backwashing; And The waste water cleaning device, characterized in that the waste water storage tank is installed in the waste water discharge pipe having an electric valve in communication with the drain pipe so that the waste water is discharged when backwashing. The wastewater washing apparatus according to claim 6, wherein the filtration tank further includes first and second clogging prevention means for preventing clogging of the filtration means. The method of claim 7, wherein the first clogging means for preventing the first motor driving unit provided on the outside of the lower cover of the filtration tank; And And a vortex impeller fixedly installed on a drive shaft of the first motor driving unit to approach the upper surface of the first screen mesh member to direct water flow directly above the first screen mesh member to the upper surface of the first screen mesh member. Waste water cleaning device. The method of claim 7, wherein the second clogging means for preventing the second motor driving unit provided on the outside of the upper cover of the filter tank; A scraper support provided between the microparticle filtration member and the second screen mesh member, the scraper support being installed at the front end of the drive shaft of the second motor driver; At least one scraper fixed to an upper surface of the scraper support to clean the lower surface of the microparticle filtration member; And Wastewater cleaning device, characterized in that consisting of the scraper support fastening means for elastically coupling the scraper support to the rotating shaft of the second drive motor. 10. The method of claim 9, wherein the scraper support fastening means is a locking jaw provided in the central portion of the scraper support to which the drive shaft of the second motor driving unit is fitted; A stopper positioned at a lower portion of the locking jaw so as to face the locking jaw at a predetermined distance and fitted to the front end of a driving shaft of the second motor driver; A coil spring interposed between the locking jaw and the stopper to provide an elastic force to the scraper support such that the scraper support can flow up and down; A fastening nut positioned below the stopper and fixed to the distal end of the rotational shaft of the second driving motor to support the stopper upward; And And a watertight member installed to seal the gap formed between the drive shaft of the second motor driving unit and the fine particle filtration member. In the waste water cleaning method for cleaning the waste water stored in the waste water storage tank by passing into the filtration tank, Filtering waste water in the waste water storage tank; A drainage step of draining the filtered wastewater to the outside of the filtration tank; A pressure sensing unit comparing the pressure in the filtration tank with a set pressure; A backwashing step of backwashing the backwater in the filtration tank when the pressure of the filtration tank is greater than a set input; And And rinsing the wastewater after backwashing. 12. The method of claim 11, wherein the reverse cleaning step comprises: sensing a pressure in the filtration tank by a pressure sensing unit; The control unit blocking the washing pipe and opening the reverse washing pipe by the signal value detected by the pressure detecting unit; And Characterized in that the waste is discharged by the reverse washing pipe Is a method for cleaning waste.