KR20150072105A

KR20150072105A - Drum screen for saparating liquid and solid

Info

Publication number: KR20150072105A
Application number: KR1020130159393A
Authority: KR
Inventors: 이광복; 김준; 허현태; 김기형
Original assignee: 인천환경공단
Priority date: 2013-12-19
Filing date: 2013-12-19
Publication date: 2015-06-29

Abstract

The present invention relates to a dual drum screen apparatus for solid-liquid separation, comprising: an outer drum screen (110) having a screen plate formed of fine holes; An inner drum screen 120 located inside the outer drum screen 110 and having a screen plate formed as a fine hole on the inner surface thereof; And a drive means (130) for rotating the inner and outer drum screens (110, 120), characterized in that the size of the hole of the screen plate of the inner drum screen is larger than the size of the hole of the screen plate of the outer drum screen .

Description

[0001] DRUM SCREEN FOR SAPARATING LIQUID AND SOLID [0002]

The present invention relates to a drum screen for solid-liquid separation, and more particularly to a drum screen having a double screen plate.

The drum screen is a solid-liquid separator used for removing suspended solids and solid particles contained in sewage and wastewater, or for separating and recovering organic particles in the process water.

In general, there are wedge-bar type and perforated plate type, which are used for solid-liquid separation in high concentration wastewater treatment facilities, and wedge-bar type is mainly used for sewage treatment and pretreatment in food treatment plant , And the perforated plate type is mainly used for the pretreatment of the separation membrane method of the sewage treatment plant.

The conventional drum screen requires a certain amount of residence time because the water containing contaminants or the like continuously supplied is transferred while being dewatered by the centrifugal force generated by the rotation of the drum screen so that the length of the drum screen is considerably long This has the disadvantage that the installation space area becomes large and the load increases proportionally.

In addition, a single perforated plate is formed on the drum screen. Since the sizes of the perforated holes are formed to the same size, the problem of clogging of the perforated plate occurs to some extent, and the drainage function is remarkably deteriorated.

In order to solve these problems, Korean Patent Registration No. 10-0868533 uses a method in which drum screens are installed in pairs and rotated in opposite directions with different numbers of revolutions.

In this case, the mesh size of the inner screen is reduced and the mesh size of the outer screen is increased.

However, this structure still causes a problem of occlusion.

Korean Patent Registration 10-0868533

It is an object of the present invention to provide a double drum screen in which the problem of clogging of the perforated plate does not occur.

The drum screen for solid-liquid separation according to the present invention is characterized in that a double-sided perforated plate is provided and the hole size of the internal perforated plate is formed larger than the hole size of the external perforated plate.

In the conventional drum screen, it was impossible to continuously operate due to deterioration of the treatment performance due to the closing of the perforated plate due to the fiber. However, by installing the double perforated plate and designing the hole size of the internal perforated plate larger than the hole size of the external perforated plate, And is a low-cost and high-efficiency device that overcomes the drawbacks of conventional drum strings (efficiency reduction due to acute occlusion).

1 is a schematic view showing a configuration of a drum screen device of the present invention.
2 is a side view of the drum screen device of the present invention.
3 is another side view of the drum apparatus of the present invention.
FIG. 4A is a photograph of a commercially available drum screening treatment solution filtered with a sieve having a pore size of 1.7 mm, FIG. 4B is a photograph of the drum screening treatment solution of the present invention FIG. 4C is a photograph of a commercially available drum screen-treated desolvation solution filtered with a sieve having a pore size of 2.4 mm, and FIG. 4D is a photograph of the drum screen-treated desolvation solution of the present invention after sieving with a pore size of 2.4 mm sieve.

Hereinafter, the present invention will be described in detail with reference to the drawings. 1, the drum screen apparatus 100 of the present invention is a dual drum screen apparatus composed of an outer drum screen 110 and an inner drum screen 120. As shown in FIG. The inner and outer drum screens 110 and 120 are driven by a driving device (not shown).

The drum screen rotation speed can be controlled by the drive unit, and the rotation direction can also be forward rotation and reverse rotation. Therefore, by blocking the rotation of the drum screen by regularly and regularly regulating the rotation of the drum screen, it is possible to prevent clogging of the screen perforated plate.

As shown in Figs. 2 and 3, is grounded and rotated on a pair of guide rollers 112 and 112 'installed on both lower sides.

As shown in Fig. 1, the high concentration ozone and wastewater to be treated are supplied from the left side to the inner screen 110, and the contaminants filtered at the lower right side are discharged.

The hole of the screen plate of the inner drum screen 120 is 3 mm or more in size and the outer drum screen 110 is formed in such a manner that the hole size of the screen plate is made less than 3 mm to primarily filter out coarse particles, The fine particles can be secondarily filtered so as to be less than or equal to 3 mm so that the stepwise treatment can be efficiently performed.

The most preferable size of the hole is that the hole size of the screen plate of the inner drum screen is 3.5 mm and the hole size of the screen plate of the outer drum screen is 2.5 mm. A storage tank 130 is disposed below the outer drum screen 110 so that the discharged waste liquid can be collected and delivered.

(Not shown) that periodically emits air strongly by using an air nozzle at the outside of the perforated network in order to prevent clogging of the perforated network by food waste during the process of separating the food waste in the desiccant of the drum screen It is possible to fundamentally prevent the occlusion of the perforated network by the fibers and the like.

In the case of using a conventional single drum screen, a filtered state was compared with a filtered desiccant, a 1.7 mm pore size nipple, and a 2.4 mm pore size nipple. The resulting photograph is shown in Fig. FIG. 4A is a photograph of a commercial drum screen-treated desolvation solution after being sieved with a sieve of 1.7 mm sieve size, FIG. 4B is a photograph of the drum screen-treated desolvation solution of the present invention filtered with a sieve of 1.7 mm sieve, FIG. 4D is a photograph of the drum screen-treated desolvation solution of the present invention after being sieved with a pore size 2.4 mm sieve. FIG. It was found that the use of the drum screen of the present invention significantly reduced the amount of coarse material.

In addition, when the food was treated, the release liquid was suitable for the landfill standard of the metropolitan area.

The double drum screen device according to the present invention is designed to have a simple structure with two double-structured perforated plates, and in particular, has a structure in which holes are sequentially reduced from the inside thereof, thereby exhibiting excellent removal efficiency and disadvantage of a commercial drum screen Which is technically overcome. It is possible to operate elasticity with low cost and high efficiency according to operating conditions.

100: Drum screen device
101: Case
110: External drumstring
120: internal drum screen
130: Storage tank
112, 112 'guide rollers

Claims

An outer drum screen (110) having a screen plate formed of fine holes; An inner drum screen 120 located inside the outer drum screen 110 and having a screen plate formed as a fine hole on the inner surface thereof; And a drive means (130) for rotating the inner and outer drum screens (110, 120), characterized in that the size of the hole of the screen plate of the inner drum screen is larger than the size of the hole of the screen plate of the outer drum screen Wherein the double drum screen device is a dual drum screen device.

The double drum screen device of claim 1, wherein the size of the hole of the screen plate of the inner drum screen is greater than or equal to 3 mm and the hole size of the outer drum screen plate is less than 3 mm.

3. A dual drum screen device according to claim 1 or 2, characterized in that the size of the hole of the screen plate of the screen is 3.5 m and the hole size of the external drum screen plate is 2.5 mm.

The dual drum screen device according to claim 1, wherein the driving device alternately performs pre-purge and reverse rotation periodically.

The dual drum screen device of claim 1, wherein the dual drum screen device further comprises an air jet device for periodically jetting air to the screen plate.