KR20150002143A - Apparatus for Producing Agricultural Water using Multistage Multicyclone System - Google Patents

Abstract

The present invention relates to an apparatus for supplying agricultural water using a multistage multi cyclone system which has a 4 step removal mean on which one or more cyclones are mounted and wherein sewage containing scum flows into the bottom and final treated water is discharged to the top, and which sterilizes and supplies the treated water. The apparatus for treating water according to the present invention effectively removes floating fine particles as well as treats precipitable waste water, and uses no chemicals including a coagulant to prevent secondary water pollution since the apparatus adopts nanobubbles and a cyclone technology, thereby being very useful in supplying agricultural water using sewage, discharge water of the sewage, or stream water.

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention [0001] The present invention relates to a multi-stage multi-

The present invention relates to an agricultural water supply apparatus using a multi-stage multi-cyclone, and more particularly to an agricultural water supply apparatus using multi-stage multi-cyclone, The present invention relates to an agricultural water supply apparatus using a multi-stage multi-cyclone in which treated water is discharged upward and sterilized and supplied to the treated water.

There is a continuing interest and effort in the reuse of sewage in the world. The application areas of reused water vary depending on the purpose, such as heavy water, industrial water, agricultural water, and river water. In many countries currently experiencing water scarcity, sewage reuse is regarded as the main water resource and various forms of utilization are being adopted.

Sewage reuse can be expected to include the supply of fertilizer ingredients in farmland, nutrient supply in fish farms, etc. in addition to the effect of supplementing water resources that are insufficient, preventing the flowering of rivers, and reconsidering the utilization rate of water. On the other hand, there are many problems to be preceded in terms of economic, social and cultural aspects such as cost problems caused by reuse of wastewater treatment water, threats to health and hygiene, and opposition of emotional resistance of residents.

In Korea, an extremely limited range of sewage recycling technologies is utilized. In 1992, the Ministry of Land, Transport and Maritime Affairs proposed the water quality standards for sewage reuse in Korea. This includes water quality standards such as flushing toilet flush, watering water, and landscape water. In addition, there is also an attempt to utilize the sewage-treated water for agricultural use and river water. Although some municipalities are using sewage disposal water for farming, they are limited to the use of water for private use because of the insufficient water quality standards of reuse. The utilization of wastewater treated water as a river maintenance water is a step to be considered for restoration of aquatic life through prevention of dryness.

 As mentioned above, although the reuse of sewage is technically, economically, and environmentally-friendly, it is highly likely to be used for agricultural water or river retention purposes. It is a reality that can not be realized because of lack.

 In agricultural water recycling of domestic sewage, high cost facilities such as heavy water system and high operating cost may cause economic problems. At present, agricultural water use is in principle a burden on the state, and the cost of using raw water is not considered. Therefore, the application of the over-cost recycling system should be considered as priority for the limitation of the use time of agricultural water and cost.

As a pretreatment method for reusing such wastewater treatment water, a pressurized flotation, a disc filter, and a fiber filtration filter are used. Since the structure is simple as compared with other apparatuses, it is applied in various fields, The use of recycled water for agricultural water supply has grown as the 'reuse water business', which uses sewage effluent as reuse water.

The pressurized flotation separation method is a method of treating the physically pretreated wastewater by pH adjustment and coagulant addition, removing the fine suspended solids and colloidal suspended matters from the pressurized flotation tank, and treating the treated wastewater with tertiary biologically. 1, or when there is a large amount of organic matter among the dissolved impurities, this method is applied for pretreatment of biological treatment, for example, food, agricultural and marine product processing wastewater, paint wastewater, waste oil and waste containing wastewater, paper wastewater and biological treatment.

In the floating separation method, the solubility of gas dissolved in water increases according to the Henry's law. Therefore, the system applies a high pressure of 4.2 to 6.3 kg / cm 2 for 10 to 30 seconds to the water introduced into the system Is introduced into the flotation tank at atmospheric pressure, microbubbles having an average particle diameter of 50 to 70 mu m or less are generated by sudden pressure reduction, and the flotation material is floated in combination with suspended substances or colloidal particles in the bubbles.

Generally, the floating separation uses the ejector and the compressor to discharge the air to form small bubbles. At this time, the bubbles rise, causing the particles to be adsorbed and floated on the surface, followed by removing the particles by a skimmer do. Characteristics Compared with the flocculation and sedimentation method, the floatation rate is faster than the sedimentation rate.

However, since the pressurized floating separation system structure requires a complicated process such as a rapid mixing tank, a slow mixing tank, a floating tank, and a micro bubble generator, Temperature, residence time, and the like are somewhat difficult, and the disadvantage is that the treatment of wastewater with high sedimentation is not suitable. It also causes downstream ecosystem contamination due to the use of chemicals such as coagulants.

The disk filter and the fiber filter (fiber disk filter), which are widely used next to the pressurized flotation separation method, are designed such that the raw water including the contaminant passes through the membrane member while the contaminant is adhered to the membrane member, The amount of contaminants deposited on the membrane member necessarily increases as the filtration process proceeds, so that the required pressure of the raw water for passing the membrane member increases.

Further, in the disk filter and the fiber filtration apparatus, a membrane cleaning operation for removing contaminants adhering to the membrane member must be performed periodically. Such membrane cleaning operation is mainly performed by backwashing the filtered permeated water through the membrane member, A physical cleaning operation and a chemical cleaning operation for removing contaminants by bringing the cleaning liquid into contact with the membrane member. Conventional pretreatment filtration apparatus performs a cleaning operation by periodically performing a physical cleaning operation, stopping the operation of the filtration apparatus only when necessary, immersing the membrane member in a chemical cleaning liquid, or passing the cleaning liquid repeatedly through the membrane member It is progressing. Therefore, secondary pollution sources of raw water contamination are caused by coagulants (chemicals), detergents, and fiber filters used in the process. Consumables to be introduced into the system are increased in cost for sewage reuse and secondary pollution .

The present inventors have made extensive efforts to solve the problems of the prior art. As a result, they have developed a multi-cyclone equipped with a four-stage cyclone treatment apparatus by applying nano bubbles to sewage in an agricultural water supply step, And thus it is possible to supply agricultural water, and the present invention has been completed.

An object of the present invention is to provide a multi-stage multi-cyclone water treatment apparatus equipped with four-stage foreign matter removing means and an agricultural water supply apparatus using an apparatus for sterilizing treated water.

In order to achieve the above object, the present invention provides an agricultural water supply apparatus including four stages of foreign substance removing means, a sterilization treatment apparatus, and a multi-stage multi-cyclone: (a) a single nanobubble generator, A first stage removing means for separating the foreign matter by a difference in specific gravity by supplying the sewage to the monthly tank after mixing; (b) 3 to 10 cyclones formed on the upper portion of the tidal chamber and connected to the overflow pipes, drains formed on the sides of the respective cyclones, and 2 Step removing means; (c) a three-stage removal means in which one cyclone and the cyclone are formed with a secondary treatment water inflow pipe and a drain; (d) four-stage removal means having 10 to 30 cyclones and an outlet of the fourth-order treated water on the cyclone; And (e) means for sterilizing the fourth treated water.

Since the water treatment apparatus according to the present invention employs nano bubbles and cyclone technology, it is possible not only to treat wastewater with high sedimentation but also to have a high removal efficiency of fine particles having high floatability and to avoid the problem of secondary water pollution It is very useful for supplying agricultural water using sewage, sewage effluent and river water.

1 is an agricultural water supply process diagram including a multi-stage cyclone water treatment apparatus.
2 is a configuration diagram of a multi-stage multi-cyclone water treatment apparatus.
3 is a cross-sectional view of the cyclone body included in the two-stage removal means in the water treatment apparatus.
4 is a cyclone assembly diagram of a four-stage removal means in a water treatment apparatus (A: sectional view of a cyclone body; B: side view of a four-stage removal means).
5 is a photograph showing sewage (A) discharged from a sewage treatment plant and the treatment effects (B, C, D) of each cyclone stage.

Hereinafter, the present invention will be described in detail.

In the present invention, a multi-stage multi-cyclone water treatment apparatus employing nano bubbles and multi-stage cyclone treatment means technology was developed. Nano bubbles were added to sewage discharged from a sewage treatment plant, and a multi-cyclone As a result, it was confirmed that the removal efficiency of suspended solids was very high, and thus the supply of agricultural water was possible.

Accordingly, in one aspect of the present invention, there is provided an agricultural water supply apparatus equipped with four stages of foreign material removing means, sterilization treatment apparatus, and multi-stage multi-cyclone for removing foreign matter contained in sewage: (a) A first stage removing means (1) provided with a generator (200) for separating foreign matter by a difference in specific gravity by supplying nano bubbles and sewage to a mooring tank after mixing; (b) three to ten cyclones formed on the upper part of the troughs and connected to the overflow pipes, drains (5) formed on the sides of the respective cyclones, and secondary treatment water discharge pipes (2); (c) a three-stage removal means (3) in which one cyclone and a secondary treatment water inflow pipe and drain (2) are formed in the cyclone; (d) four-stage removal means (4) having 10 to 30 cyclones and a discharge portion (7) of quaternary treated water on the cyclone; And (e) a means 400 for sterilizing the fourth-order treated water.

The water treatment apparatus according to the present invention is characterized in that particulate matter having a specific gravity higher than that of water and particulate matter having a specific gravity lower than that of water are separated and removed by the centrifugal force of the cyclone and the floating principle of the nano bubble.

The term "specific gravity" in the present invention is based on the assumption that the density of water is 0.999972 g / cm ³ at 4 ° C under 1 atmospheres for solid and liquid and 0 ° C at 1 atmospheres for gases, A large substance sinks under water, and a substance with a specific gravity smaller than 1 is characterized by floating in water. Typically, the approximate weight of a material is, for example, 0.2 for fired wood, 0.24 for cork, 0.705 for gasoline, 0.92 for rubber, 1.6 for brick, 1.9 for sandstone, 2.4 for concrete and 3.45 for glass and by purity, It can be different.

The wastewater introduced into the water treatment apparatus of the present invention may be mixed with the nano bubbles at a ratio of 50 vol% or less, preferably 5 vol% to 20 vol%, most preferably 5 vol% .

In the present invention, the nano bubbles adsorb fine suspended particles to float on top of sewage or enlarge the particles to facilitate treatment in the cyclone apparatus.

Therefore, in the present invention, the one-stage removing means 1 is connected to a device in which the nano bubble generator 200 and sewage are mixed.

The supernatant of the treated water containing the nano bubbles of the one-stage removing means 1 included in the water treatment apparatus of the present invention flows out to the two-stage removing means 2 through the overflow pipe located in the upper part of the moon tank.

In the present invention, the mulling trough has a drain (3) at the lower side of the mulling trough and a drain pipe at the top to remove particles having a specific gravity greater than that of water, such as sand.

The term drain used in the present invention is a foreign matter outlet, which is a pipe through which suspended matter precipitated by centrifugal separation by a cyclone is removed.

In the present invention, each of the cyclones of the two-stage removal means 2 is connected to the flow-through pipe and is installed at a predetermined interval around the flow-through tank, thereby treating the inflow water in the pipe.

When the bottom of the two-stage removing means 2 is connected to the overflow pipe, the primary treated water containing nano bubbles flows into the inside of the two-stage removing means 2, Substances and bubbles with lower specific gravity than water are removed through the drain (5) formed on the side, and the material with higher specific gravity is precipitated and removed by the drain (4) formed at the lower part, and the secondary treatment water is elevated by the centrifugal force And discharged to the third stage processing means 3.

In the present invention, the two-stage removing means (2) is characterized in that 3 to 100 pieces are mounted on the upper portion of the outer wall of the overflow trough, preferably 3 to 10, and most preferably 6.

The water treatment apparatus of the present invention is characterized in that the water treatment by each step-removing means is continuously performed as long as the treatment water is continuously supplied.

In the present invention, the secondary treatment water introduced into the three-stage removal means 3 is centrifuged by mounting one cyclone, and the treated water from which the suspended substances have been removed is raised, And the foreign matter is settled downward and discharged to the drain (2).

The drain (2) included in the three-stage removal means (3) is formed to have a structure that passes through the inside of the falling trough and extends to the lower portion of the trough and communicates with the outside. Therefore, the mulling trough is characterized by a folded structure composed of a space where the treatment water retreats and a space formed by the drain (2) of the three-stage removing means 3.

In the present invention, the cyclone of the four-stage removal means comprises four stages of (a) space (8), (b) cyclone upper portion (9), (c) cyclone body (10) (Fig. 4B).

In the present invention, the cyclone of the four-stage removing means 4 is provided in a penetrating manner so as to allow the treated water to flow into the center of the cyclone body (10), and has 10 to 100, preferably 10 to 30 And most preferably 20 cyclones are mounted at regular intervals. In particular, each cyclone is mounted so as to fit the drain formed in the cyclone lower circumference (11) (FIG. 4A).

In the present invention, the tertiary treatment water treated in the three-stage removal means 3 flows into the cyclone lower portion 11 of the four-stage removal means 4 and then reaches the cyclone body 10, (10), and then flows into the cyclone. At this time, the foreign matter is discharged to the lower drain (6), and the treated water rises to the upper part of the cyclone Is moved to the space (8) through the formed pipe (9) and discharged. And then supplied to the agricultural water through the electrolytic sterilizing device (400).

The water treatment apparatus of the present invention can be used for pretreatment of sewage treatment plant effluent or river farming water.

Typically, sewage entering the wastewater treatment plant contains 500 ppm to 1500 ppm of saline, and water quality standards for effluent water are specified to be less than 10 ppm for suspended solids (SS), which can be used as agricultural water. However, Or more flows into the treatment plant, the sewage treatment can not be performed smoothly. Therefore, the concentration of the suspended substance is more than 30 ppm, which is not suitable as discharged water.

Therefore, the water treatment apparatus of the present invention can be applied to the agricultural water supply process as shown in FIG. 1, and more preferably, when the SS concentration of the treated water in the sewage treatment plant is abnormally high, Can be used to supply water.

The present invention will be described in more detail with reference to the following examples. However, the following examples are provided to aid understanding of the present invention, and the scope of the present invention is not limited by these examples in any sense.

In this case, unless otherwise defined, technical terms and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. In the following description and the accompanying drawings, A description of known functions and configurations that may unnecessarily obscure the description of the present invention will be omitted.

Example

The multistage multi-cyclone water treatment apparatus according to the present invention having the above-described configuration is subjected to a floating material removal process that operates in each step shown in FIG.

First, sewage is supplied through the sewage inflow pump 100 with the drain formed at each stage of the apparatus being opened. At this time, 5 vol% to 20 vol% of nano bubbles are mixed and sewage is introduced into the water treatment apparatus. As sewage flows in, the cyclones in each stage are operated, and the number of treatments rises due to centrifugal force and overflow, reaching the fourth stage.

When the inflow water containing 5 vol% to 20 vol% of nano bubbles is introduced into the apparatus at a pressure of 1 kg / cm 2 with respect to the sedimentation water having the SS concentration of 32 ppm, when the treated water is treated in the first stage treatment means 1, (3), the discharge water containing the coarse particles such as sand is discharged at 1 vol% of the total inflow amount.

The first treated water that has stayed in the moon lake flows into the second stage removing means (2) through the moon flow pipe, and the treated water rises due to the centrifugal force while being sucked into each cyclone. ⑤), and the suspended matter with a high specific gravity is discharged to the drain (④) at the bottom. Unlike other devices, the two-stage control means includes two drains and discharges 2 vol% of the total inflow amount.

As the three-stage removal means, the secondary treated water flows in and remains, while the particulate matter is discharged by the one cyclone through the drain (2) formed on the bottom surface, the tertiary treated water flows directly into the four- The treated water passes through 20 cyclones, the particulates are discharged to the drain (6) below the cyclone, and the treated water is discharged (7) to the upper part while rising. And then finally supplied to the agricultural water through the electrolytic sterilizing device 400.

The treatment efficiency of the multi-stage multi-cyclone water treatment system was 95% of the treatment efficiency by measuring the amount of the drain to about 5% with respect to the initial influent water. The SS concentration of the initial influent water was 32 ppm, And the treatment efficiency was measured to be considerably high at 9.5 ppm (Fig. 5).

While the present invention has been particularly shown and described with reference to specific embodiments thereof, those skilled in the art will appreciate that such specific embodiments are merely preferred embodiments and that the scope of the present invention is not limited thereto will be. Accordingly, the actual scope of the present invention will be defined by the appended claims and their equivalents.

100: Feed pump
200: Nano bubble generator
300: Multistage multi-cyclone device
400: Electrolysis sterilizer
1: Step 1 removal means
2: Two-stage removal means
3. Three-step removal means
4: Four-step removal means
①: Sewage supply pipe containing nano bubble
②: Drain of the 3-step removal means
③: Drain of 1st stage removal means
④: Drain (bottom) of 2-stage removal means
⑤: The drain (side)
⑥: Drain of the 4-step removal means
⑦: Final treated water discharge
⑧: Space
⑨: Cyclone upper part
⑩: Cyclone body
⑪: Cyclone underneath

Claims (10)

Agricultural water supply system equipped with the following four stages of foreign material removing device, sterilization treatment device and multi-stage multi-cyclone:
(a) a single-stage removing means having one nano bubble generator and supplying nano bubbles and sewage to the moon tank to separate foreign matter with a specific gravity difference;
(b) 3 to 10 cyclones formed on the upper portion of the tidal chamber and connected to the overflow pipe, drains formed on the sides of the respective cyclones, and 2 Step removing means;
(c) a three-stage removal means in which one cyclone and the cyclone are formed with a secondary treatment water inflow pipe and a drain;
(d) four-stage removal means having 10 to 30 cyclones and an outlet of the fourth-order treated water on the cyclone; And
(e) a sterilization treatment device for sterilizing the fourth treated water.
The agricultural water supply apparatus according to claim 1, wherein the nano bubbles are mixed at a ratio of 5 vol% to 20 vol% of sewage.
The agricultural water supply apparatus according to claim 1, wherein the one-stage removing means has a drain on the opposite side of the nano bubble mixed water supply pipe, and a drain pipe is provided on the upper side.
The agricultural water supply apparatus according to claim 1, wherein the cyclone of the two-stage removal means is connected to the flow pipe, and is installed around the flow pipe to process inflow water in the flow pipe.
The agricultural water supplying apparatus according to claim 1, wherein the drain of the three-stage removing means is mounted through the center of the tank.
The agricultural water supply apparatus according to claim 1, wherein the cyclone of the four-stage removing means comprises four stages of (a) space, (b) cyclone upper portion, (c) cyclone body, .
The agricultural water supplying apparatus according to claim 1, wherein the drain of the four-stage removing means is formed on a side surface of the lower portion of the cyclone.
The agricultural water supply apparatus as claimed in claim 6, wherein the cyclone lower part and the cyclone body are provided in a through-hole so as to flow process water into the center.
The agricultural water supply apparatus according to claim 6, wherein the cyclones are installed at regular intervals inside the wall surface of the cyclone body.
The agricultural water supply apparatus according to claim 1, wherein the sterilizing apparatus is an electrolytic sterilizer.

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