KR101297685B1 - Rapid cleaning device for suspended particulate matters - Google Patents

Abstract

The wastewater is filtered using a crawler belt screen, and the solid material attached to the belt screen is desorbed with an air knife to compress and transport the solid material through a screw conveyor, and the wastewater is pretreated or screened by flowing the filtered water. In the rapid particulate floating material processing apparatus, there is disclosed an improved rapid particulate floating material processing apparatus that can further reduce the energy consumed in the operation of an air knife. The present invention is a rapid particulate suspended solids treatment apparatus, wastewater inlet; An endless belt screen for filtering the solids of the wastewater introduced into the wastewater inlet and allowing the filtered treated water to flow out, the belt screen comprising an inclined portion and a flat portion; An air knife mounted downward between the belt screens constituting the flat portion to filter the belt screens to blow solid material that is not detached; A spray nozzle mounted downward between the belt screens forming the flat part to wash oil remaining on the belt screen; A screw conveyor installed under the air knife to compress and convey the solid matter detached from the belt screen; An outlet through which the filtered treated water and the washing water by the spray nozzle flow out; And a suction device installed in the direction of the belt screen at an outer side of the belt screen forming the flat part to reduce the adhesion strength of the solid material which is filtered out of the belt screen to remove the detachable solid particles.

Description

RAPID CLEANING DEVICE FOR SUSPENDED PARTICULATE MATTERS}

The present invention relates to an apparatus for treating suspended solids, and more particularly, to filter wastewater by using an endless belt screen, and to decompress solid materials attached to the belt screen with an air knife to compress and transport the solids through a screw conveyor. The present invention relates to a rapid particulate suspended solids treatment apparatus for pretreating or screening wastewater by a method of distilling filtered treated water.

High concentration wastewater containing nutrients such as domestic sewage and factory wastewater contains high concentrations of organic matter and various pollutants. Since it is impossible, a pretreatment process is required.

In this pretreatment technology, conventional technology using a purifier and screen is disadvantageous in terms of site, installation cost, etc. US Pat. No. 6,942,786 discloses wastewater using an endless track filter belt. Filtering and desorption of the solids attached to the belt using a blowing device to compress and transport the solids through the screw conveyor, and to present the wastewater treatment apparatus for pre-treating or screening the wastewater by flowing out the filtered treatment water. Is getting.

In order to solve the high energy consumption of the blowoff device, which is adopted at the end of the process in the track belt filter belt, the proposed patent improves the speed of the blown air by improving the end structure of the blowing device. A method for effectively removing solid matter stuck to the filter belt while reducing energy consumption is proposed.

However, despite the improvement of the blower structure proposed in the above patents, a considerable amount of energy is still consumed for the complete desorption of solids attached to the caterpillar filter belt, and the blower device in the large-scale operation of wastewater treatment facilities The technology for reducing the energy consumed by the drive is constantly needed.

Therefore, the present invention has been made to solve the above problems, by filtering the wastewater using the belt screen of the caterpillar type and the solid material attached to the belt screen by desorption with an air knife to compress and transport the solids through a screw conveyor, filtering In the rapid particulate floating material treatment device for pre-treating or screening wastewater by flowing out the treated water, there is provided a rapid particulate floating material processing device having an improved structure that can further reduce the energy consumed to operate the air knife. I would like to.

In order to solve the above problems, the present invention, a rapid particulate suspended solids treatment apparatus, wastewater inlet; An endless belt screen for filtering the solids of the wastewater introduced into the wastewater inlet and allowing the filtered treated water to flow out, the belt screen comprising an inclined portion and a flat portion; An air knife mounted downward between the belt screens constituting the flat portion to filter the belt screens to blow solid material that is not detached; A spray nozzle mounted downward between the belt screens forming the flat part to wash oil remaining on the belt screen; A screw conveyor installed under the air knife to compress and convey the solid matter detached from the belt screen; An outlet through which the filtered treated water and the washing water by the spray nozzle flow out; And a suction device installed in the direction of the belt screen at an outer side of the belt screen forming the flat part to reduce the adhesion strength of the solid material which is filtered out of the belt screen to remove the detachable solid particles.

The suction device may include a suction unit for sucking air in the suspended solids processing device, a vacuum pump for performing suction of the suction unit, and a suction pipe connecting the suction unit and the vacuum pump. Provided is an apparatus for treating particulate matter.

In addition, the suction unit provides a rapid particulate floating material processing apparatus, characterized in that formed to extend to correspond to the width of the belt screen.

In addition, when the suction device is operated, the vacuum pump is filtered to the belt screen provides a rapid particulate suspended solids processing apparatus, characterized in that the operation is operated to the strength that the non-desorbed solid material is not sucked.

In addition, the suction device provides a rapid-type particulate floating material processing apparatus, characterized in that installed on the outer side of the lowered portion is changed the moving direction of the belt screen.

In addition, the air knife provides a rapid particulate floating material processing apparatus, characterized in that the blower is installed in a direction opposite to the traveling direction of the belt screen.

In addition, the blowing angle of the air knife provides a rapid particulate floating material processing apparatus, characterized in that 85 to 30 ° based on the traveling direction of the belt screen.

According to the present invention, the wastewater is filtered by using a crawler type belt screen, and the solid matter attached to the belt screen is desorbed with an air knife to compress and transport the solid material through a screw conveyor, and the wastewater is filtered out. In the rapid particulate suspended solids treatment device for pre-processing or screening, the suction device is installed in the direction of the belt screen at the periphery of the belt screen to add a suction device that is filtered to the belt screen to reduce the adhesion strength of the non-desorbed solids. It is possible to provide a rapid particulate suspended solids treatment apparatus that can significantly reduce the energy consumed in the operation of the air knife compared to the additional energy consumed in the.

In addition, by changing the structure of the blowing direction of the air knife so as to be opposite to the traveling direction of the belt screen, it is possible to provide a rapid particulate floating material processing apparatus that can further reduce the energy consumed for complete desorption of the solid attached to the belt screen. Can be.

1 is a schematic cross-sectional view illustrating a rapid-type particulate matter treatment apparatus according to an embodiment of the present invention;
FIG. 2 is a schematic cross-sectional view seen from the direction “A” of FIG. 1;
Figure 3 is a schematic cross-sectional view illustrating the installation of the air knife according to an embodiment of the present invention.

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, the present invention will be described in detail with reference to the accompanying drawings. In order to clearly illustrate the present invention, parts not related to the description are omitted, and like parts are denoted by similar reference numerals throughout the specification. Also, throughout the specification, when an element is referred to as "comprising ", it means that it can include other elements, not excluding other elements, unless specifically stated otherwise.

FIG. 1 is a cross-sectional schematic view illustrating an apparatus for treating rapid-type particulate particulate matter according to an embodiment of the present invention, and FIG. 2 is a cross-sectional schematic view seen from the direction “A” of FIG. 1.

First, referring to FIG. 1, the rapid particulate floating material treating apparatus 100 according to the present invention includes a wastewater inlet 110; Filtering the solids (S) of the waste water (W) introduced into the wastewater inlet 110, and the endless track belt screen 120 for flowing out the filtered treated water (TW), the inclined portion 121 and A belt screen 120 composed of flat portions 122; An air knife 130 mounted downward between the belt screens 120 forming the flat part 122 to filter the belt screen 120 to blow off solids S which are not detached; A spray nozzle 140 mounted downward between the belt screens 120 forming the flat part 122 to wash the oil remaining on the belt screen 120; A screw conveyor (150) installed below the air knife (130) to compress and convey the solids (S) detached from the belt screen (120); An outlet 160 through which the filtered treated water TW and the washing water by the spray nozzle 140 flow out; And a suction installed in the direction of the belt screen 120 at the outer side of the belt screen 120 forming the flat part 122 to filter the belt screen 120 to reduce the adhesion strength of the solid S that is not detached. Including the device 170, the wastewater (W) passing through the belt screen 120 by the belt screen 120 is moved upwardly inclined to the wastewater (W) flowing into the wastewater inlet 110 is treated If it falls to the bottom of the device 100 exceeds a certain amount and overflows to the outlet 160, the solid S filtered on the belt screen 120 is moved to the top, air installed in the flat portion 122 The wastewater (W) is treated through a process of being blown by the knife 130 and dropped and compressed to the screw conveyor 150 installed at the bottom of the flat part 122.

The belt screen 120 serves to filter the wastewater (W) contacted by the formation of a fine mesh, and is not limited to the material if it can be manufactured in a caterpillar shape using a roller shaft. What is produced in a flexible form using a resin such as polyethylene can be used. The mesh size of the belt screen 120 may be selected and mounted in various ranges according to the type of wastewater (W) flowing in, the solid composition, and the like, and may have a mesh size of about 15 to 850 μm, preferably 100 to 500 μm. Belt screen 120 having a can be used.

In addition, the belt screen 120 is an endless track type consisting of an inclined portion 121 and a flat portion 122, the first roller shaft 181 and the processing apparatus 100 installed at one end of the lower processing apparatus 100 The first roller shaft 182 is continuously moved in accordance with the relative rotation of the second roller shaft 182 provided on the other end, and is installed between the first roller shaft 181 and the second roller shaft 182 parallel to the second roller shaft 182 The belt screen 120 is formed to be divided into the inclined portion 121 and the flat portion 122 by the three roller shaft 183. At this time, the fourth roller shaft 184 is installed in the corresponding portion of the lower portion of the third roller shaft 183 so that the tension of the lower belt screen 120 can be maintained.

The introduced waste water (W) is filtered by contacting the upper side of the inclined portion 121 of the first belt screen 120, at this time, the waste water (W) is maintained by a certain range of water level between the inclined portion 121 and passes through the water level. One belt screen 120 is moved to the flat portion 122 with the solid (S) attached. Some solids (S) due to the centrifugal force and gravity due to the rotation of the belt screen 120 when the belt screen 120 is lowered to change the direction of the belt screen 120 on the second roller shaft 182 past the flat portion 122, the belt screen 120 Detachable from the screw conveyor hopper 151 is installed below the flat portion 122, but due to the viscosity of the waste water (W) due to the amount of solids (S) is attached to the belt screen 120 The lower portion of the flat portion 122 continues. In this way, it is necessary to remove the solid S that is not detached from the lower side of the belt screen 120, and the air knife 130 is utilized as a means for effectively detaching the solid S.

The air knife 130 is mounted to air blow downward between the upper side and the lower side of the belt screen 120 forming the flat part 122. For example, the supply pipe 132 connected to the compressed air source is fixed by using a bracket installed between the upper and lower sides of the belt screen 120, and the nozzle 131 is coupled to the lower portion of the supply pipe 132 to be formed in the supply pipe 132. The air is blown through the hole 133, but the nozzle 131 is mounted downward to blow the lower side of the belt screen 120 (see FIG. 3). The nozzle 131 has an extended inlet chamber that receives compressed air from the extended supply pipe 132, an inlet formed by a series of holes, and an outlet formed in a tapered shape with a cross section having a diameter of up to about 5 times larger than the inlet hole. By designing to be made of a slit, a structure that can significantly increase the blowing speed can be employed, for more details, see US Patent No. 6,942,786.

On the other hand, in the present invention, the air knife 130 is preferably installed so as to blow in the direction opposite to the traveling direction of the belt screen 120. Figure 3 is a schematic cross-sectional view illustrating the installation of the air knife according to an embodiment of the present invention.

In the present invention, the air knife 130 may be installed to be blown directly downward, but as shown in FIG. 3, the nozzle outlet part is blown so that the air knife 130 is blown against the downward travel direction of the belt screen 120. 131 may be installed in a state inclined by a predetermined angle (θ, hereinafter referred to as a 'blowing angle') with respect to the advancing direction of the belt screen 120. Therefore, the area of the belt screen 120 that is blown under the same conditions can be increased to more effectively remove the solids S attached to the belt screen. At this time, of course, the blowing strength may be somewhat reduced than when the air knife 130 is installed to blow directly downward, but the adhesion strength of the solid (S) is significantly reduced than the conventional case by the action of the suction device 170 to be described later As a result, problems due to the decrease in blowing strength can be sufficiently overcome.

In the present invention, the blowing angle θ of the air knife 130 is advantageous because it can widen the area of the belt screen 120 that is blown as it is inclined from directly below (90 °) with respect to the belt screen 120. When installed in an inclined state, the solid S detachable may be dispersed in the processing apparatus 100 without falling into the screw conveyor hopper 151. Accordingly, the blowing angle of the air knife 130 is preferably installed in the range of 85 to 30 °, more preferably 80 to 45 °, most preferably 70 to 50 °.

The solids S blown and detached by the air knife 130 are dropped onto the screw conveyor hopper 151 installed below the air knife 130 and are compressed and transported through the screw conveyor 150. At this time, the solid (S) is transported along the discharge pipe 152 by the operation of the screw conveyor 150, as shown in Figure 2, the elastic opening and closing hole 153 by the elastic opening and closing 153 is connected to the end of the discharge pipe 152 ) Is compressed until it does not open, and removes the water dehydrated by compression through the drain 154 installed at the bottom of the discharge pipe 152 portion where the solid (S) is compressed solids (S) dried about 15 to 40% Can be discharged.

The spray nozzle 140 allows hot water to be sprayed downward between the upper side and the lower side of the belt screen 120 forming the flat part 122, but the air knife 130 is based on the downward movement direction of the belt screen 120. It is installed at the rear of the air knife 130 by removing the solids (S) that are not detached from the belt screen 120 or viscous stronger than the blown by the air knife 130 despite the blowing of the air knife 130 Washing means for maintaining the filtering performance of the belt screen 120 is circulated. The method of installing the spray nozzle 140 is not particularly limited. For example, the spray nozzle 140 may be installed by arranging a series of nozzles 140 at regular intervals corresponding to the width of the belt screen 120.

The spray nozzle 140 may be operated from time to time, for example, an injection rate of 0.3 to 1.2 l / s using hot water at a temperature of 60 to 80 ° C., preferably 65 to 75 ° C. for 1 minute at an interval of 1 hour, preferably Preferably at a spray rate of 0.6 to 0.8 l / s.

The washing water sprayed using the spray nozzle 140 may be drained by installing a separate gutter, but as shown in FIG. 1, the filtered water is discharged through the outlet 160 along with the filtered water (TW) that flows over the filter. Can be handled in such a way.

The suction device 170 is a device for reducing the adhesion strength of the filtered solids (S) attached to the upper side of the belt screen 120, the belt screen (outside the belt screen 120 forming the flat portion 122) 120) is installed in the direction. Some of the filtered solids S are attached to the belt screen 120 by being attached to the belt screen 120 by being attached to the belt screen 120 due to its viscosity. By reducing the adhesive strength of the solids (S), the strength of the air knife 130, which is a subsequent device, that is, it is possible to completely remove the solids (S) even using a relatively low energy. Therefore, the suction device 170 may be installed in front of the air knife 130 on the basis of the belt screen 120 travel direction, and as shown in FIG. 1, the travel direction of the belt screen 120 is changed. That is, the belt screen 120 may be installed to be sucked in the direction of the belt screen 120 in the outer portion of the lower portion.

If the suction device 170 is capable of reducing the adhesive strength of the solid S stuck to the belt screen 120, there is no particular limitation on the structure, for example, as shown in FIG. A suction unit 171 for sucking air in the processing apparatus 100, a vacuum pump 172 for performing suction of the suction unit 171, and a suction pipe 173 for connecting the suction unit 171 and the vacuum pump 172. It may be configured to include).

The suction unit 171 effectively reduces the adhesion strength of the solid S stuck to the belt screen 120, but when the solid S is sucked in addition to the internal air, the performance of the suction device 170 may be deteriorated. It is preferable to be installed to be spaced apart from the attached solid (S) layer, it is preferable to extend to correspond to the width of the belt screen 120 to exert a suction effect in all parts of the belt screen 120.

Although the vacuum pump 172 and the suction pipe 173 may use a normal thing, the vacuum pump 172 as described above, the suction device 170 so that the solid (S) is not sucked into the suction unit 171. When the operation of the belt screen 120 is filtered so that the non-desorbed solids (S) is preferably operated to such a degree that does not suck.

Suspended material processing apparatus 100 according to the present invention may be added to the configuration commonly used in the art to which the present invention belongs in addition to the above configuration. For example, a sensor module (not shown) is installed inside the processing apparatus to maintain the level of the incoming wastewater W at an appropriate level, thereby blocking the inflow of wastewater when it exceeds a predetermined level, and not reaching the predetermined level. Waste water (W) may be introduced again, and alternatively, as shown in FIG. 1, a water level indicator 190 may be installed.

Floating material processing apparatus 100 according to the present invention is manufactured in a completely closed system form is excellent in persistence and maintainability, maintain a clean environment and can be installed indoors in a modular manner. In addition, it occupies a very small installation space, saving major infrastructure investment costs (about 50% or less) and space (about 10% or less), greatly reducing the burden on pretreatment to primary treatment facilities in wastewater treatment processes. A fine belt screen is used to effectively remove approximately 10-100 μm of solids and, when applied to municipal sewage treatment, approximately 40-70% of total suspended solids (TSS) and 20-40% of BOD. Can be removed. In the case of filtered solids (S), the total solids (TS) is about 2 to 4%, which may be a suitable feeding source for the anaerobic digester, and in the sludge cake dewatered in the discharge pipe 152. 15-40% solids (S) can be provided.

Test Example

In order to grasp the energy saving effect through the operation of the suction device and adjusting the blowing angle of the air knife in the floating material processing apparatus according to the present invention, the rapid-type particulate floating material processing apparatus according to the present invention as shown in Figs. And the inhalation device non-operation and air knives were prepared directly below each of the rapid-type suspended particulate matter treatment apparatus and the energy consumption was measured in the following manner and the results are shown in Table 1 below. At this time, the main specifications of the rapid-type suspended particulate matter treatment apparatus is as follows.

[Quick-Type Particle Floating Substance Handling Device Specification]

Treatment capacity: 10-15 l / sec TSS removal rate: 50-60%

-Sludge solid content: 35 ~ 30%-Length: 1540㎜

Width: 1340 mm Height: 1490 mm

-Weight: 450 kg-Belt screen material: Polyethylene

Belt screen mesh: 350 μm Belt screen weight: 50 kg

-Spray Nozzles: 1 / 2inch φ, 8-Belt Screen Motor Output: 0.75hp

-Screw Motor Power: 0.75hp-Air Knife Motor Power: 5hp

-Suction unit pump output: 0.5hp-Air knife blowing angle: 60 °, 90 °

[Measuring Energy Consumption]

The amount of power used for wastewater treatment for one hour was measured for each of the manufactured rapid-type suspended particulate matter treatment apparatuses using wastewater having the same composition. At this time, in the removal of solids by the air knife and the oil removal by the spray nozzle in each rapid particulate floating material treatment device, the pumping intensity of each air knife, the spray nozzle and the suction device was adjusted to be completely washed to the same degree visually.

division Power Consumption Suction Unit Operation + Blowing Angle 60 ° 4.6 Suction unit not activated + blowing angle 90 ° 5.8

As shown in Table 1, in the case of the rapid-type particulate matter treatment apparatus in which the suction device is installed according to the present invention and the blowing angle of the air knife is properly adjusted, the adhesion strength of the solid stuck to the belt screen due to the suction device is operated. Significantly reduced by significantly reducing the blowing strength of the air knife can be seen that the energy savings of about 20% in the same wastewater treatment performance.

The preferred embodiments of the present invention have been described in detail with reference to the drawings. It will be understood by those of ordinary skill in the art that various changes in form and details may be made therein without departing from the spirit and scope of the present invention as defined by the appended claims.

Accordingly, the scope of the present invention is defined by the appended claims rather than the foregoing detailed description, and all changes or modifications derived from the meaning, range, and equivalence of the claims are included in the scope of the present invention Should be interpreted.

100: suspended solids treatment device 110: wastewater inlet
120: belt screen 121: inclined portion
122: flat part 130: air knife
131: nozzle 132: supply pipe
140: spray nozzle 150: screw conveyor
151: screw conveyor hopper 152: discharge pipe
153: elastic opening and closing 154: drain
160: outlet 170: suction device
171: suction unit 172: vacuum pump
173: suction pipe 181: first roller shaft
182: second roller shaft 183: third roller shaft
184: fourth roller shaft 190: water level indicator
W: wastewater TW: treated water
S: solids

Claims (7)

delete As a high speed particulate suspended solids treatment device,
Wastewater inlet;
An endless belt screen for filtering the solids of the wastewater introduced into the wastewater inlet and allowing the filtered treated water to flow out, the belt screen comprising an inclined portion and a flat portion;
An air knife mounted downward between the belt screens constituting the flat portion to filter the belt screens to blow solid material that is not detached;
A spray nozzle mounted downward between the belt screens forming the flat part to wash oil remaining on the belt screen;
A screw conveyor installed under the air knife to compress and convey the solid matter detached from the belt screen;
An outlet through which the filtered treated water and the washing water by the spray nozzle flow out; And
A suction device installed in the direction of the belt screen at an outer side of the belt screen forming the flat part to reduce the adhesion strength of the solid material which is not removed by being filtered by the belt screen;
Including but not limited to:
The suction device includes a suction unit for sucking air in the suspended solids processing device, a vacuum pump for performing suction of the suction unit, and a suction tube connecting the suction unit and the vacuum pump. Material handling device. The method of claim 2,
And the suction part is extended to correspond to the width of the belt screen. The method of claim 2,
When the suction device is operated, the vacuum pump is filtered to the belt screen, the rapid particulate matter suspended solids processing apparatus, characterized in that the operation is such that the strength is not sucked. The method of claim 2,
The suction device is a rapid-type particulate suspended solids processing device, characterized in that installed on the outer side of the falling portion is changed the direction of travel of the belt screen. The method of claim 2,
And the air knife is installed to be blown in a direction opposite to the advancing direction of the belt screen. The method according to claim 6,
Blowing angle of the air knife is a rapid-type particulate floating material processing apparatus, characterized in that 85 to 30 ° based on the traveling direction of the belt screen.

Images