KR200340184Y1 - A Grease trap - Google Patents

Abstract

The present invention relates to a sewage purification trap (grease trap), and in detail, the sewage containing the solid residues, such as fats and foods, temporarily stored in the separation tank (10) provided with a strainer (15) and partitions (13, 14) Firstly, the solids are separated by the strainer 15 and the water and the fats and oils are separated by the specific gravity difference in the second stage, and the separation tank 10 filters the fats and oils floating on the water by contact. And a maintenance device 20 for maintaining the inside of the separation tank 10 having the aeration device 30 associated with the ozone generator 40 in the interior of the separation tank 10 together with the maintenance recovery device 20. Sewage sterilization and deodorization of the sewage and to improve the separation and recovery efficiency of water and fats and oils, and the fats and oils recovery device 20 is at least in contact with the water surface to capture the fats floating on the water surface ( The rotating body 21 which has f1, f2, and this rotating body 21 The scraper 22 for scraping the fats and oils, the adsorption member 23 for adsorbing the fats and oils scraped from the rotating body 21, and the water trapped together with the fats and oils are separated in the tank 10 Has a recovery path 24 for recovery, and the rotating body 21 is rotationally driven by the drive motor 25.

Description

Sewage Purification Trap {A Grease trap}

The present invention relates to a sewage treatment trap, and in detail, the sewage containing solid waste, such as oil and food, is temporarily stored in a separation tank provided with a strainer and a partition wall, and the solid waste is separated firstly by the strainer, and the second specific gravity difference. By separating the water and the oil by the water, the separation tank is provided with a fat recovery unit for contacting to filter the fats and oils floating on the water, and the ozone generator and the inside of the separation tank together with the fat recovery It is equipped with the associated aeration device to increase the separation and recovery efficiency of oil and fat as well as sterilization of sewage.

Currently, the number of food and lodging establishments near the water supply sources such as the Han River, Nakdong River, Geum River, and Yeongsan River is increasing to hundreds of thousands every year.The wastewater generated from these is discharged into natural water immediately after being treated with a small merger purification tank, which is an individual wastewater treatment facility. It is becoming. In addition, due to changes in dietary culture, the consumption of meat food is increasing day by day, the fat content of waste water is also increasing.

On the other hand, problems that may be caused by the discharge of waste fat include the formation of an oil film after attaching to the surface of sewage pipes, which causes problems in sewage transport due to the blockage of the pipes, and the oil film on the water surface of the treatment facility. Not only does it interfere with oxygen transfer, but also sticks to the surface of the treatment plant, causing adverse effects on treatment efficiency. In addition, the waste fat component discharged into the natural water system is rarely decomposed naturally, causing serious odor problems in the surrounding environment to provide a complaint.

Unlike other environmental pollutants, these waste fat components require pretreatment for treatment at the site of generation or at least for conversion to stable substances.

Conventionally, the treatment of waste fat components has been physically and chemically removed by means of a pressure flotation device and a fat separation tank, and then treated by activated sludge method, but this requires a large area of land for the pretreatment device. There is a problem of effort and cost. In addition, even when the foreign oil-treated products are used, processing efficiency is low and there is a limit in processing capacity unless a large-scale trap device is used, which is likely to be released before fat is decomposed to cause odor. In addition, there is a lack of oil removal technology suitable for wastewater characteristics.

The prior art related to the present invention discloses the name "high efficiency oil removal device and removal method" of the invention of Patent No. 392484 (registered date of 2003.07.10), which separates sludge, such as food waste, from the collection box, In the first treatment water from which sludge is separated, the oil-rich oil water stays on the water surface, and the oil-free oil water is flowed into the second chamber through the H-type drainage pipe which goes to the second chamber at the bottom. In the second chamber, the oil stays on the water surface, and only the lower treated water with less oil component flows stepwise through the H-type drain pipe to the discharge tank, and then is discharged through the outflow pipe to the outside, and the primary treated water and the secondary treatment The trapped floating oil near the surface of water with a lot of oil in the water is introduced into the funnel-shaped oil suction pipe using the suction force of air and sent to the oil removal microorganism storage tank. When the oil removal microorganism storage tank is raised, the oil level of the oil removal microorganism storage tank is increased. In this oil removal microorganism storage tank, the light oil component is present on the water, and the treated water in the lower part is sent back to the first chamber through a circulation drain pipe connected to the first chamber at the lower part so that the oil is separated. Only components are decomposed and removed by microorganisms, and the aeration device raises dissolved oxygen so that microorganisms become active by aeration in the first and second chambers and oil removal microorganism storage tanks when there is no inflow of sewage by a timer device. The water of the discharge chamber is re-spread in the first and second chambers, so that the water level in the first and second chambers is raised, and the remaining oil content on the surface is transferred back to the oil removal microorganism storage tank through the oil suction pipe. Sewage in the first chamber flows into the second chamber and the discharge tank step-by-step through the H-type drain pipe, and most of the oil in the first chamber and the second chamber is removed. The oil component is decomposed by the microorganisms manually inserted into the oil removal microorganism storage tank, and the microorganisms are diffused through the apparatus to decompose and remove the oil.

On the other hand, the high-efficiency oil removal device according to the prior art is to enable effective removal of the oil component in the sewage by microorganism decomposition, which is the same as the miniaturization of the existing combined purification tank is structurally complex and its production and installation and Operation was difficult.

The present invention was devised to solve the above-mentioned conventional problems, and the object of the present invention is to meet the domestic situation in order to overcome the economic and technical difficulties in the removal of fats and oils contained in sewage. It is to make it possible to solve the problem of inflow of small merged septic tank of oil contained in sewage discharged from business and water pollution and odor induction caused by natural water discharge into undecomposed state at the oil field.

In order to achieve the above object, the present invention temporarily stores the sewage containing oil and debris in a separation tank provided with a strainer and a partition wall to separate solid wastes by a strainer first, and to separate water and fats by a specific gravity difference. In the separation, inside the separation tank provides a sewage purification trap having a fat recovery unit for contacting the oil fat floating on the water by contact.

Preferably, the aeration device is installed inside the separation tank together with the oil recovery unit to raise the oil content dissolved in the emulsion in water onto the water to increase the recovery rate of the oil release, and the ozone generator includes By installing and connecting the air containing ozone to aeration to facilitate the separation of oil and water with the sterilization action of sewage.

In addition, the present invention facilitates maintenance thereof by installing the oil reclaimer detachably from the separation tank, and adds only the oil reclaimer and aeration device of the present invention to the existing sewage purification trap (aka grease trap). By installing it to be able to achieve the purpose of the present invention.

Specifically, the fat or oil recovery device of the present invention has a rotary body having a trapping surface that contacts at least the water surface and traps the fat or oil suspended on the water surface, and a scraper for scraping the fat or oil captured by the rotary body. And an adsorption member for adsorbing the fat or oil scraped from the rotor, and a recovery path for recovering the water captured with the fat and oil in the separation tank, and the rotor is rotated by a drive motor.

Rotating body of the fat recovery machine in the present invention may have a disk shape having a capture surface on the left and right sides, a cylindrical or spherical shape having a capture surface on the outer peripheral surface, and may have various forms suitable for capturing other fats and oils, It is preferable that the capture surface has a concave-convex curved surface in order to increase the surface area.

In addition, the scraper includes a scraping blade in close contact with the capturing surface of the rotating body, and an inclined chute for supporting the scraping blade and supplying a fat or oil containing the scraped water to the adsorption member, The adsorption member is made of a pack form in which the oil adsorbent is contained inside the mesh bag to periodically recover the adsorption member to extract the oil and recycle it.

1 is a perspective view of the trap and control box for sewage purification according to the present invention,

2 is a cross-sectional view of the sewage treatment trap according to the present invention,

3 is a plan view of the trap for sewage purification according to the present invention,

4 is a perspective view of the fat and oil recovery machine according to the present invention,

5 is a front view of the fat and oil recovery machine according to the present invention,

Figure 6 is a perspective view showing a cylindrical rotating body structure of the fat and oil recovery machine according to another embodiment of the present invention,

7 is a perspective view of a rotating body according to another embodiment of the present invention,

8 is a perspective view of a rotating body according to another embodiment of the present invention,

9 is a cross-sectional view of the sewage treatment trap showing an operating state of the present invention,

10 is a cross-sectional view showing an operating state of the oil and fat recovery machine.

* Explanation of symbols for main parts of the drawings

10: separation tank 11: sewage inlet pipe

12: sewage outflow pipe 13: first bulkhead

14: 2nd bulkhead 15: strainer

16: first compartment 17: second compartment

18: third compartment 19: mounting bracket

20: oil and fat recovery machine 20a: frame

21: rotating body 22: scraper

22a: scraping blade 22b: chute

23: adsorption member 23a: bag

23b: sorbent 24: recovery furnace

25: drive motor 26, 27: inclined plate

28: chain 29a: drive sprocket

29b: driven sprocket 29c: bearing

30: aeration device 32: air generator

40: ozone generator 50: control box

f1, f2: capture surface g: fat

t: air tube

Hereinafter, with reference to the accompanying drawings, preferred embodiments that do not limit the present invention will be described in detail.

1 is a perspective view showing a sewage purification trap according to an embodiment of the present invention, Figure 2 is a cross-sectional view showing the internal structure of the sewage purification trap shown in Figure 1, Figure 3 is a sewage purification trap shown in Figure 1 Top view of the.

1 to 3, the sewage purification trap according to the embodiment of the present invention has a sewage inlet pipe 11 installed on one side, and a sewage outflow pipe 12 installed on the other side thereof. Separation tank 10 in which partitions 13, 14 are partitioned into first, second, and third compartments 16, 17, and 18, and the first compartment 16 is provided with a strainer 15 for filtering solids. Wow;

A fat recovery unit (20) installed in the second compartment (17) inside the separation tank (10) to filter out fats floating on water;

It comprises a; aeration device 30 is installed on the inner bottom side of the separation tank (10).

The oil and fat recovery unit 20 and the aeration device 30 is controlled to operate in an external control box 50, the control box 50 inside the ozone to be associated with the air generator 32 of the aeration device 30. The generator 40 is provided so that air containing ozone is supplied to the aeration device 30 inside the separation tank 10 through the air tube t.

In the figure, 's' is a wire connected between the control box 50 and the oil recovery unit 20 of the separation tank 10, and 'l' is a separation tank lid.

Control of the oil retainer 20 and the aeration device 30 by the control box 50 is usually operated by a timer for a predetermined time (for example, 10 minutes) and then stopped again (for example, a stop time). 10 minutes) or repeat the operation or stop it if necessary.

As shown in FIGS. 4 and 5, the fat-recovering unit 20 is detachable from the separation tank 10, that is, a mounting bracket 19 is attached to the inside of the separation tank 10. The powder collecting device 20 is manufactured on a frame 20a of a size that can be seated on the mounting bracket 19. The oil collecting device 20 is at least in contact with the water surface to float the oil floating on the water surface. A rotating body 21 having a capturing surface to be captured, a scraper 22 for scraping the fat and oil captured by the rotating body 21, and a fat and oil scraped off the rotating body 21. Adsorption member 23 for adsorption, and a recovery path 24 for recovering the water captured with the fat and oil to the separation tank 10, wherein the rotating body 21 is driven by a drive motor 25 to rotate. It is supposed to be.

The drive motor 25 rotates at a relatively low speed by a geared motor, and a power transmission chain 29c is connected between the drive sprocket 29a of the drive motor and the driven sprocket 29b of the rotating body 21. .

In the present embodiment, the rotating body 21 is composed of a simple disk having a capture surface (f1, f2) on the left and right sides, the present invention is not limited to this, as shown in Figure 6 the capture surface (on the outer peripheral surface ( It is also possible to produce a cylindrical shape having f1).

In addition, in order to maximize the surface area, the capturing surfaces f1 and f2 of the rotating body 21 are preferably manufactured as uneven curved surfaces, respectively.

The scraper 22 in contact with the rotating body 21 supports the scraping blade 22a in close contact with the capturing surfaces f1 and f2 of the rotating body, and supports and scrapes the scraping blade 22a. It comprises an inclined chute (22b) for supplying the oil containing the water to the adsorption member (23), the adsorption member (23) is an oil adsorbent (23b) is contained in the mesh bag (23a) By manufacturing in a pack form, the recovery thereof is facilitated.

More preferably, the bottom surface of the separation tank 10 faces each other between the first compartment 16 and the second compartment 17 and between the second compartment 17 and the third compartment 18, respectively. When the aeration action occurs in the second compartment 17 by installing the inclined plates 26, 27, the water flows into the second compartment 17 while guiding the flow of bubbles backward, and the first compartment 16 is provided. By preventing backflow into the third compartment 18 or outflowing directly into the third compartment 18, it is possible to perform a kind of baffle plate to stabilize the water flow.

When the sewage containing the oil is introduced into the sewage inflow pipe 11 formed on one side of the separation tank 10 as shown by the arrow in FIG. 9, the sewage is separated into the separation tank 10. Temporarily stored and then discharged to the outside when the height of the sewage outflow pipe 12 of the other side is higher than the other side, the sewage flowing into the sewage inlet pipe 11 is the inside of the separation tank 10 The three partitioned spaces, that is, the first, second, and third compartments 16, 17, and 18 are separated by the first and second partitions 13 and 14, and the water flows severely in the first compartment 16. Is blocked, and the sewage in which the flow is stable flows toward the second compartment 17 through the lower portion of the first partition wall 13.

Since the strainer 15 is installed in the first compartment 16, various solid wastes such as food wastes introduced together with water from the sewage inlet pipe 11 are filtered first.

When sewage flows into the second compartment 17, the fat (g) having a lower specific gravity than the water rises above the water, and the fat (g) dissolved in the emulsion in the water is discharged from the aeration apparatus 30. It is separated from the water by the action of the bubbles (b) generated to rise.

In addition, since the bubble (b) generated in the aeration device 30 passes through the ozone generator 40 installed in the control box 50, the bubble b is supplied into the water in a state containing a large amount of ozone, thereby providing a strong sterilization effect of ozone. As a result, the sewage in the separation tank 10 can be prevented from being decayed, and a rotting odor can be prevented.

On the other hand, the fat (g) floating on the water is recovered by the fat recovery unit 20, which is rotated by the drive motor 25 as shown in FIG. The fats and oils g floating on water adhere to the capture surfaces f1 and f2 of the entire surface 21, and the fats and oils stuck to the capture surfaces f1 and f2 are scraping blades of the scraper 22. It is scraped by 22a and flows toward the adsorption member 23 through the chute 22b, and is adsorbed to the adsorption member 23, and the water following this is recovered under the separation tank 10 through the recovery passage 24. do.

According to the present invention, the fats and oils (g) contained in sewage are separated from water by the continuous operation of the fats and oils recovery device 20 and the aeration device 30, and the fats and oils floating in the second compartment 17 ( g) is prevented from flowing into the third compartment 18 by the second partition 14.

In addition, since the inclined plates 26 and 27 are disposed below the first partition 13 and the second partition 14 so as to face each other, the flow of water flow is more stable and the oil content g is the first. It is effectively prevented from flowing back toward the compartment 16 or overflowing toward the third compartment 18, and since the bubble b generated in the aeration device 30 is guided toward the upper rotating body 21 by the inclined plate 26. The fats and oils melted in the emulsion state in water floats toward the rotating body 21 together with the bubbles b and comes in contact with the capture surface f1 to increase the capture efficiency of the fats and oils g.

On the other hand, the inflow of sewage into the first compartment 16 is made continuously, when the water level of the sewage is higher than the sewage outflow pipe 12 of the third compartment 18, the water naturally in the third compartment (18) It flows toward and discharged outward through the sewage outflow pipe 12. Therefore, since the fat or oil (g) is not recovered to the third compartment 18 but is recovered in the second compartment 17, the fat or oil is not contained in the sewage discharged to the outside, thereby achieving the above-described object of the present invention. Before the fat is adsorbed to the adsorption member 23 in a saturated state, the adsorption member 23 may be replaced with a new one. It can be used as a useful resource by collecting and recycling the oil.

In addition, the present invention is installed in the existing sewage purification trap already installed without the re-installation of the entire sewage purification trap, the oil and fat recovery device 20 and the aeration device 30 of the present design by the control box 50 By controlling this, it is possible to carry out the design, so that the oil-recovery efficiency of the sewage purification trap can be improved at a low cost.

As described above, the present invention is provided with a fat recovery unit for contacting the fats and oils or fats and oils, such as food, hospitality, car wash, etc., by contacting to filter out the fats and oils in the sewage purification trap installed in a place where a large amount of oil or fats are discharged. In addition to the oil and fat recovery unit in the separation tank is provided with an aeration device associated with the ozone generator, according to the present invention, since the oil and fat discharged with the sewage at the production site of the oil and fat can be recovered and blocked essentially. In addition to solving the problems caused by the inflow of the merger and purification tank, it is useful to economically and fundamentally solve the environmental pollution problem caused by the sewage including oils and fats being discharged to the natural water system.

Claims (11)

In the sewage containing the fats and oils are temporarily stored in a separation tank provided with a strainer and bulkhead to separate the solids residues by the strainer first, and to separate the water and the fats and oils by the specific gravity difference. The sewage treatment trap, characterized in that the inside of the separation tank (10) is provided with a fat recovery unit (20) for filtering by contact the fat and oil floating on the water. The method according to claim 1, Trap for sewage treatment, characterized in that the aeration device 30 is provided in the separation tank 10 together with the fat-recovery unit 20. The method according to claim 2, The aeration device 30 is connected to the ozone generator 40, the trap for sewage purification, characterized in that the air containing ozone to aeration. The method according to any one of claims 1 to 3, The oil-retaining trap 20 is a sewage purification trap, characterized in that installed separable from the separation tank (10). The method according to claim 1, The fat and oil recovery device 20 scrapes the rotor 21 having a trapping surface that contacts at least the water surface and traps the fat and oil suspended on the water surface, and the fat and oil captured by the rotor 21. A scraper 22 for cleaning, an adsorption member 23 for adsorbing the fat or oil scraped from the rotor 21, and a recovery path for recovering the water captured together with the fat and oil to the separation tank 10. (24), the rotary body 21 is a sewage purification trap, characterized in that driven by the drive motor (25). The method according to claim 5, The rotary body 21 is a trap for sewage treatment, characterized in that the disk having a trapping surface (f1, f2) on both sides. The method according to claim 5, The rotary body 21 is a sewage purification trap, characterized in that the cylindrical shape having a capture surface (f1) on the outer peripheral surface. The method according to claim 6 or 7, Trap for sewage purification, characterized in that the trapping surface (f1, f2) of the rotating body 21 is made of a concave-convex curved surface to increase the surface area. The method according to claim 5, The scraper 22 is a scraping blade (22a) in close contact with the capture surface of the rotating body, holding the scraping blade (22a) and the oil containing the scraped water toward the adsorption member (23) A sewage purification trap comprising an inclined chute 22b for supplying. The method according to claim 5, The adsorption member (23) is a trap for sewage purification, characterized in that it is made of a pack form containing the oil adsorbent (23b) inside the mesh bag (23a). The method according to claim 1, Sewage purification trap, characterized in that the inclined plate (26, 27) is installed below the partition (13, 14).