KR200478684Y1 - Suction Piping Device to suck the treated water through separation membrane with parallel and serial spaced and Sewage treatment device having the same - Google Patents

Abstract

The present invention relates to a suction piping device for sucking a liquid that has passed through a separation membrane arranged in series and in parallel and a sewage treatment device having the suction piping device and a suction piping device for sucking the liquid having passed through the separation membrane, A serial piping unit connected in series with the liquid passage passing through the separation membrane in series along the longitudinal direction; A parallel piping portion communicably connected to one end of the plurality of series piping portions at equal intervals along the longitudinal direction; And a suction pipe connected to a suction side of a suction pump which communicates with one side of the parallel piping and transfers the liquid that has passed through the separation membrane.
According to the present invention, there is provided a suction pipe device for sucking a liquid through a separator arranged in series and in parallel, which can minimize the suction resistance, improve the processing ability and increase the reliability of the equipment, A sewage treatment apparatus can be provided.

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a suction pipe apparatus for sucking treated water having passed through a separator arranged in series and in parallel and a sewage treatment apparatus having the same,

The present invention relates to an aspiration piping device for aspirating treated water having passed through a separation membrane arranged in series and in parallel and a sewage treatment device having the same, And a suction pipe device for sucking treated water having passed through the separation membrane arranged in parallel, and a sewage treatment device having the suction pipe device.

As we live in the 21st century, we have been using various medicines, health supplements, medicines and other daily necessities for improvement of living standards. These substances are contained in household wastewater through a shower, a bath, a wash, a toilet, and the like. Among these substances, medicinal substances are classified in each country including the US Environmental Protection Agency. Especially, antibiotics, when present in sewage, produce new antibiotic resistant bacteria in the water environment or kill beneficial microorganisms and destroy ecological environment and food chain .

The use of antibiotics in Korea is known to be among the highest among OECD countries. Some of the synthetic musk compounds, which are fragrance ingredients such as perfumes, cosmetics, soaps, shampoos, fragrances and detergents that are widely used in addition to medicinal substances, are toxic to aquatic ecosystems or are suspected to be endocrine disruptors and are completely processed And it is discharged into the water environment, and even if it exists at a low concentration, there is a possibility of accumulation in the water organism by fat-soluble.

In this way, domestic sewage in public sewage treatment facilities in large-sized metropolitan cities not only receives various kinds of sewage but also various kinds of wastewater from plants located in the treatment area. In the case where a small-scale small-scale factory is scattered, wastewater flows into the wastewater through the sewer pipe, so it is no exaggeration to say that the domestic wastewater flows into the wastewater treatment facility in a different form from the old one.

Initially sewage treatment facilities are facilities for treating sewage discharged mainly from residential areas, commercial areas and public facilities, and the main ingredients are suspended substances, biodegradable organic substances, nitrogen and phosphorus.

So far, biological treatment processes have been focused on the reduction of chemical oxygen demand (COD) concentration of influent water, and its treatment efficiency is mainly affected by suspended microbial concentration (MLSS), slush retention time (SRT) It is known to be closely related to process variables. Since the T-P standard has been strengthened since 2012, existing biological treatment is limited for phosphorus (P) treatment, and biological treatment and physico-chemical treatment methods are being applied.

As an example of such prior arts, Patent Publications 10-0296411, 10-1008016, 10-0715020, and the like are disclosed.

In this treatment method, a separation membrane separating the sludge contained in water is used in order to enhance the effect. The filtrate that has passed through the separation membrane is transferred through the pump.

However, since the piping structure between the separation membrane and the pump has a plurality of separation membranes and the separation membrane is disposed in a structure in which the separation membrane is installed at a constant interval, the structure is not simple and is located at a position higher than the suction side of the pump. It is desirable that the efficiency of the pump can be maintained.

The object of the present invention is to provide a suction piping device for sucking treated water having passed through a separation membrane arranged in series and in parallel, which can minimize suction resistance, and a sewage treatment apparatus having the same.

The object of the present invention is to provide a suction piping device for sucking a liquid having passed through a separation membrane arranged in series and in parallel and capable of improving the processing capability and increasing the reliability of the facility, and a sewage treatment apparatus having the same.

The object of the present invention is to provide a suction pipe apparatus for sucking treated water that has passed through a separation membrane in a wastewater treatment apparatus including a separation membrane, A series piping unit coupled to the pipeline; A parallel piping portion communicably connected to one end of the plurality of series piping portions at equal intervals along the longitudinal direction; And a suction pipe connected to one side of the parallel piping part and connected to a suction side of a suction pump for transferring treatment water having passed through the separation membrane. The suction pipe device for sucking the liquid through the separation membrane .

Preferably, the longitudinal direction of the parallel piping portion is disposed in the longitudinal direction of the longitudinal piping portion.

It is preferable that each of the serial piping portions includes three separation membranes, and that the parallel piping portion includes eight serial piping portions.

It is preferable that the piping pipe standard of the series piping unit is 150A, the piping pipe standard of the parallel piping unit is 450A, and the suction piping unit includes the piping pipe standard of the parallel piping unit.

In addition, the series pipe portion and the parallel pipe portion are arranged at the same height (the center axis of each piping portion is the same height) and are horizontal, and the suction pipe portion is vertical in the vertical direction, And is preferably horizontal with the suction side of the suction pump.

Preferably, the suction pipe portion is coupled to a central region of the parallel pipe portion.

It is preferable that the flow rates of the series piping and the suction piping are higher than the flow rates of the parallel piping and the flow rates of the series piping and the suction piping are slower than the flow speed of the suction side of the suction pump.

The object of the present invention is also achieved by a sewage treatment apparatus characterized by including a suction piping device for sucking treated water that has passed through a separation membrane.

According to the present invention, there is provided a suction pipe apparatus for sucking treated water having passed through a separator arranged in series and in parallel, which can minimize suction resistance, improve processing ability and increase facility reliability, Processing apparatus can be provided. In addition, cavitation and noise of the suction pump can be prevented, and even when the separation membrane is occluded during long operation, the operation can be performed more stably.

1 is a view for explaining a sewage treatment apparatus according to an embodiment of the present invention;
Fig. 2 is a view showing the main part of Fig. 1,
FIG. 3 is a schematic view of a suction piping device for sucking a liquid that has passed through a separation membrane according to an embodiment of the present invention;
4A and 4B are schematic views of a suction piping device for sucking a liquid that has passed through a separation membrane, showing comparative examples in comparison with the present invention.

The sewage treatment apparatus 100 according to one embodiment of the present invention will be described in detail with reference to FIGS. 1 to 4B.

FIG. 1 is a view for explaining a sewage treatment apparatus according to an embodiment of the present invention, FIG. 2 is a view showing a main part of FIG. 1, and FIG. 3 is a cross sectional view of a liquid passing through a separation membrane according to an embodiment of the present invention FIGS. 4A and 4B are schematic views of a suction piping device for sucking a liquid that has passed through a separation membrane, which shows comparative examples in comparison with the present invention. FIG.

For the sake of convenience of description, for the sake of convenience of explanation, the oblique direction along the left-right direction is referred to as an " X " axis direction, the oblique direction along a forward / backward direction is referred to as a " Y " Respectively.

As shown in FIG. 1, the sewage treatment apparatus 100 according to an embodiment of the present invention collects sediments such as heavy sands by collecting the inflowed sewage, collects the sediments and collects the lumps and the like, An anoxic tank 120 capable of performing various chemical or physical treatments, a membrane separation tank 140 including an anaerobic tank 130 and a separation membrane 142 for separating liquid and sludge, And a reusing water tank 160 for storing the treated clear liquid and is connected to a suction piping device (not shown) for sucking the separated filtrate from the separation membrane 142 of the membrane separation tank 140 200 and a suction pump 141 disposed downstream of the suction piping device 200 for transferring the separated filtrate.

The wastewater treatment apparatus 100 includes a flow rate distributing tank 113 capable of adjusting a flow rate that is higher than necessary and a joint tab 115 installed at a downstream end of the flow rate distributing tank 113 and capable of storing temporarily treated sewage, And a screen tank 117 provided between the bonding tab 115 and the anoxic tank 120 for filtering fine solids, lumps, and the like.

In the anoxic tank 120, denitrification occurs due to microorganisms, and nitrate nitrogen in the mixed liquid of raw water and existing liquid in the reaction tank is converted into nitrogen gas and removed. The anoxic tank 120 may be mixed with raw water (hereinafter, used in the same sense as sewage to be treated) and a carrier liquid conveyed from the downstream tearing tank 170. Microorganisms present in the mixed liquid may be introduced An underwater mixer or an agitator (not shown) may be installed in the anoxic tank 120 so as to be well mixed with sewage.

The anaerobic tank 130 is disposed at the rear end of the anoxic tank 120, and the mixed liquid in the anoxic tank 120 flows in. In the anaerobic tank 130, oxygen is not present at all and phosphorus can be eluted from the cells of the microorganism. An underwater mixer or agitator (not shown) may be installed to prevent solids such as microorganisms from being settled in the anaerobic tank 130.

The membrane separation tank 140 is disposed at the downstream end of the anaerobic tank 130, and the mixed liquid in the anaerobic tank 130 flows in. Ammonia nitrogen and nitrite nitrogen in the mixed liquor transferred to the membrane separation tank 140 are nitrified by nitrifying nitrate by the microorganisms and phosphorus in the raw water discharged from the anaerobic tank 130 is removed from the membrane separation tank 140 by microorganisms It is removed by overdosing.

Dissolved organic substances, which are BOD components, are partially removed while passing through the anoxic tank 120 and the anaerobic tank 130, but most of the dissolved organic substances introduced into the membrane separation tank 140 are not removed and are mostly removed from the membrane separation tank 140.

The treated water from which the dissolved organic substances and nitrogen and phosphorus are removed is filtered through a plurality of separation membranes 142 immersed in the membrane separation tank 140 and is transferred to the reusing water tank 160 by the suction pump 141 for recycling have. The separation membrane 142 is formed with innumerable minute voids on the surface thereof. Through the voids, solid matters such as microorganisms that can not pass through the separation membrane 142 out of the mixture liquid outside the separation membrane 142 are filtered.

The separation membrane 142 is in communication with a suction pump 141 provided outside the membrane separation tank 140 and a suction piping device 200 connecting the suction pump 141 and the separation membrane 142. When the suction pump 141 is operated, a vacuum pressure is formed inside the separation membrane 142 connected to the suction pump 141, and the vacuum pressure becomes a driving force. Thus, solids such as microorganisms in the mixture liquid outside the separation membrane 142 So that the excluded process water flows into the separation membrane 142 through the pores. At this time, the solid matter such as microorganisms may move to the surface of the separation membrane according to the flow of the treated water and may cause occlusion phenomenon to block the air gap. In order to prevent such occlusion, the air generated in the reaction tank blower 145, which is necessary to supply the air required for respiration of the microorganisms, is supplied through the air diffuser at the lower end of the separation membrane 142, It is possible to prevent the solids from adhering to the surface of the separation membrane 142 due to the formation of water flow.

The suction pump 141 can be controlled to be operated by an electric signal by a water level sensor (not shown) provided in the membrane separation tank 140. It is possible to control the operation of the suction pump 141 in conjunction with the level sensor in the membrane separation tank 140. Further, the suction pump 141 can be controlled to be intermittently operated to prevent the separation membrane 142 from being blocked. That is, the suction pump 141 is operated for several minutes and then stopped for a few minutes, thereby preventing the separation membrane 142 from being blocked.

On the other hand, it is possible to control intermittent operation in which the reactor blower 145 repeats operation and stoppage while the water level of the membrane separation tank 140 is low or the suction pump 141 is stopped.

The mixed liquid remaining in the membrane separation tank 140 without being discharged to the outside is conveyed by natural descent flowing to the degassing vessel 170 at the downstream stage. The remaining oxygen contained in the mixed liquor flowing into the degassing vessel 170 is vaporized into the atmosphere in the degassing vessel 170.

The mixed liquid in the degassing tank 170 is supplied to the anoxic tank 120 in the front stage by the transport pump 144 installed in the degassing tank 170 while containing nitrogenous nitrogen (NO 3 -) and microorganisms in the state where free oxygen is removed Lt; / RTI >

In order to prevent the occlusion phenomenon of the separation membrane 142 that may occur during continuous operation, the separation membrane 142 may be automatically backwashed using a backwash pump 149. Such an automatic backwashing method can be selectively performed among known methods, and therefore, a detailed description thereof will be omitted. Needless to say, various chemicals including the cleaning agent 149a may be used in this process.

The surplus sludge in the degassing vessel 170 is transferred to and stored in the sludge storage tank 150 through the surplus sludge pump 143 and may be transferred to facilities other than the present sewage treatment apparatus 100 according to the purpose of filling.

A storage tank stirring blower 147 is provided to supply air to the sludge storage tank 150 and the reusing water tank 160.

It is needless to say that the sewage disposal apparatus 100 of the above-described example is an example and other configurations except for the membrane separation tank 140, the suction piping device 200, and the suction pump 141 may be omitted as necessary.

In FIG. 1, a portion indicated by a dotted line represents a piping conveyed to a deodorizing device (not shown) for collecting volatile substances generated during the treatment of sewage (raw water, mixed liquid) and removing odors.

As shown in FIG. 3, the suction piping device 200, which is a feature of the present invention, includes a serial piping portion 200, which is connected in series with a liquid passage passing through a plurality of separation membranes 142, A plurality of parallel piping parts 230 connected to one end of the plurality of parallel piping parts 210 at equal intervals along the longitudinal direction and communicating with one side of the parallel piping part 230, And a suction pipe unit 250 coupled to the suction side 141a of the suction pump 141 for transferring the liquid passing through the suction pipe 141. [

It is preferable that the longitudinal direction (see the 'X' axis direction) of the parallel piping unit 230 is arranged in the longitudinal direction (see the 'Y' axis direction) of the serial piping unit 210. This is because the membrane separator 140 normally occupies a large space of a square.

In the suction piping device 200 according to the present invention, three separation membranes 142 are connected to the respective series piping 210, eight parallel piping portions 210 are connected to the parallel piping 230, . The number of the separation membranes 142 and the number of the series piping portions 210 coupled to the parallel piping portion 230 may differ depending on the performance of the separation membrane 142, the processing capacity, the size of the membrane separation vessel 140, .

The piping pipe standard of the parallel piping unit 230 includes 450A and the suction piping unit 250 includes the piping pipe standard of the parallel piping unit 230 It is preferably the same as the piping pipe standard and is the same as the suction stroke of the suction pump 141 at the suction side 141a of the suction pump 141. [

That is, the suction pipe device 200 is characterized in that the parallel pipe portion 230 coupled with the plurality of the series pipe portions 210 coupled with the separation membrane suction pipe 210a formed on the upper side of the separation membrane 142 is connected to the suction pump 141 ) Functioning as a reservoir or buffer zone for gently adjusting the flow of the treated water. The flow of the treated water in the series piping section 210 can be made gentle in the parallel piping section 230, thereby relieving the resistance due to suction of the suction pump 141. Therefore, it is preferable that the flow rates of the series piping 210 and the suction piping 250 are higher than those of the parallel piping 230. As will be described later, the flow rate at Point 1 is 0.89 m / sec, the flow rate at Point 2 is 0.39 m / sec, The flow rate at 'Point 3' was 0.79 m / sec and the flow rate at 'Point 4' was 1.78 m / sec.

The vertical piping section 210 and the parallel piping section 230 are arranged at the same height (the central axes of the respective piping sections are at the same height) so that they are immersed in the normal membrane separation tank 140 of the separation membrane 142, And the suction pipe unit 250 is vertical to the suction side 141a of the suction pump 141 at a suction side 141a of the suction pump 141, (Located on the XY plane) is preferable.

The suction pipe unit 250 is connected to the central area of the parallel pipe unit 230 so that the flow rate or resistance of the process water sucked in the parallel pipe unit 230 that performs the buffering function is adjusted through the entire separation membrane 142 Can do the function.

The suction piping device 200 having such features effectively arranges the piping extending from the plurality of separation membranes 142 arranged at regular intervals in the wide space of the membrane separation tank 140 to the suction pump 141 in series and in parallel, By selecting the pipe diameter, the effect of the present invention was obtained.

As a comparative example to the present invention, a comparison between the case where the suction piping devices 300 and 400 are constructed as shown in FIGS. 4A and 4B and the suction piping device 200 according to the present invention, Lt; 1 >.

For reference, the total processing capacity of the separation membrane 142 used in this data is 452 m 3 / hr and the total number of the separation membranes 142 is 24.

The size of one embodiment of the separation membrane according to the present invention is about 7 m in depth, 9 m in width, and 25 m in length.

division Comparative Example 1
(300, Fig. 4A) This invention
(Fig. 3) Comparative Example 2
(400, Figure 4b) Remarks Point 1 Diameter (mm) 150 150 150 Length (m) 10.9 9.2 9.2 Flow rate (m3 / min) 0.942 0.942 1.884 Flow rate (m / s) 0.89 0.89 1.78 Point 2 Diameter (mm) 150 450 300 Length (m) 4.1 9.6 9.6 Flow rate (m3 / min) 1.883 3.767 3.767 Flow rate (m / s) 1.78 0.39 0.89 Point 3 Diameter (mm) 300 450 300 Length (m) 11.5 7.3 7.3 Flow rate (m3 / min) 3.767 7.533 7.533 Flow rate (m / s) 0.89 0.79 1.78 Point 4 Diameter (mm) 300 300 300 Length (m) 1.5 1.5 1.5 Flow rate (m3 / min) 7.533 7.533 7.533 Flow rate (m / s) 1.78 1.78 1.78

As a result of measuring the processing capacity according to the standard of Table 1, the results shown in Table 2 were obtained.

division Pump Membrane criteria
Treatment flow Operation result processing flow rate (㎥ / hr) Remarks form Volume 30Hz 35Hz 40Hz Comparative Example 1 Single suction
Centrifugal
Volute 9.42㎥ / min
10mH 452 m3 / hr 110 140 170 37.6% Comparative Example 2
(Temporary pump) 4.5 m3 / min
18mH Pump reference
270 m3 / hr 130 160 190 42.0 This invention 9.42㎥ / min
10mH 452 m3 / hr 262 375 478 106%

As can be seen from Tables 1 and 2, when the flow rate in the parallel piping portion 230 and the series piping portion 210 is substantially equal to the flow rate of the suction side 141a of the suction pump 141, Considering that the piping length of the apparatus is long and the piping is installed above the separation membrane 142 and the suction pump 141 is installed below the serial piping unit 210 and the parallel piping unit 230, 141, the process water can not be sufficiently filled in the pipe during the flow of the process water. As a result, an empty space may be formed and the process flow rate may not be processed, which may cause cavitation or noise in the suction pump 141.

As can be seen from the present invention and comparative examples, the suction piping device 200 (FIG. 1), which guides the suction pipe 141 from the separation membrane 142 to the suction pump 141 even if the proper design flow speed of the suction side of the suction pump 141 is 1.5 to 3.0 m / The flow rate in the series piping 210, the parallel piping 230 and the suction piping 250 may be in the range of 0.39 to 0.89 m / sec, which is much slower than this. If it is slower than this, it can be seen that the treatment water flow can not be maintained constant, and the cost according to the standard of the piping is increased.

Therefore, according to the present invention, there is provided an aspiration piping device for sucking treated water having passed through a separation membrane arranged in series and in parallel, which can minimize the suction resistance, improve the treatment ability and increase the reliability of the facility, It is possible to provide a wastewater treatment apparatus. In addition, cavitation and noise of the suction pump can be prevented, and even when the separation membrane is occluded during long operation, the operation can be performed more stably.

While the embodiments of the present invention have been shown and described herein, it will be apparent to those skilled in the art that modifications may be made to the embodiments without departing from the principles or spirit of the inventions . The scope of the invention will be determined by the appended claims and their equivalents.

100: sewage treatment device 110:
113: Flow distributing tank 115:
117: Screen 120: Anoxic
130: anaerobic tank 140: membrane separation tank
141: suction pump 142: separator
143: surplus sludge pump 145: reactor blower
147: Storage tank stirrer blower 149: Backwash pump
150: Sludge storage tank 160: Reuse tank
170:
200: suction piping device 210: serial piping part
230: parallel piping part 250: suction piping part

Claims (8)

A suction pipe apparatus for sucking treated water having passed through a separation membrane in a wastewater treatment apparatus including a separation membrane,
A serial piping unit connected in series with the treatment water passage passing through the plurality of separation membranes in series along the longitudinal direction;
A parallel piping portion communicably connected to one end of the plurality of series piping portions at equal intervals along the longitudinal direction;
And a suction pipe connected to one side of the parallel piping part and connected to a suction side of a suction pump for transferring treated water having passed through the separation membrane.
Wherein the flow rate of the series piping portion and the suction piping portion is faster than the flow rate of the parallel piping portion and the flow rate of the series piping portion and the suction piping portion is slower than the flow rate of the suction side of the suction pump,
The parallel piping portion and the parallel piping portion are arranged at the same height (the central axes of the piping portions have the same height)
Wherein the suction pipe unit is vertical in the up-and-down direction and is parallel to a suction side of the suction pump at a suction side of the suction pump. The method according to claim 1,
And the lengthwise direction of the parallel piping portion is disposed in a transverse direction of the longitudinal direction of the serial piping portion. 3. The method according to claim 1 or 2,
Wherein each of the series piping portions includes three separation membranes,
Wherein the parallel piping section includes eight serial piping sections, and the suction piping device sucks the treated water having passed through the separation membrane. The method of claim 3,
The piping pipe standard of the series piping is 150A,
The piping pipe standard of the parallel piping includes 450A,
Wherein the suction pipe unit includes a piping pipe standard of the parallel piping unit. delete The method according to claim 1,
Wherein the suction pipe unit is coupled to a central region of the parallel pipe unit. delete The sewage treatment apparatus according to claim 1, comprising a suction piping device for sucking treated water that has passed through the separation membrane.

Images