KR101815929B1 - Sludge treatment apparatus of sewage disposalplants - Google Patents

Abstract

The present invention relates to a water level-variable type sludge treatment apparatus for a sewage treatment plant. According to the present invention, the water level-variable type sludge treatment apparatus includes: a mixing means which mixes polymer for agglutinating the sludge with the inflowing sludge; a microbubble generator which generates microbubbles to float the sludge; an accommodation tank which accommodates the mixed water of the sludge and the polymer; and a sludge pickup means which picks up the floated sludge from the accommodation tank. The sludge pickup means includes: an absorption rotating body which is installed on the surface of the water of the accommodation tank and adsorbs the sludge; a sludge collecting part which removes and collects the sludge stuck on the outer circumferential surface in a circumferential direction of the absorption rotating body; a discharge device which pumps up the sludge collected by the sludge collecting part and forcibly discharges the sludge; an elevating means which elevates the absorption rotating body according to the water level of the accommodation tank; and a transverse movement means which moves the absorption rotating body in a transverse direction of the accommodation tank to move an absorption position. According to the present invention, the water level-variable type sludge treatment apparatus has a simple structure where the sludge on the surface of the water is absorbed and discharged by the rotation axis movement of the absorption rotating body installed on the surface of the water in the accommodation tank. Accordingly, the water level-variable type sludge treatment apparatus of the present invention is capable of being installed at low costs, minimizing the causes of the breakdown of the apparatus since there is no interference between the components, and minimizing the time and costs for the maintenance. Further, the water level-variable type sludge treatment apparatus of the present invention operates by only the operation of the rotation axis, thereby facilitating quiet driving, reducing power loss, and improving energy efficiency.

Description

Technical Field [0001] The present invention relates to a sludge treatment apparatus for a sewage treatment plant,

The present invention relates to a water level variable type sludge treatment apparatus of a sewage treatment plant, and more particularly, to a water level variable sludge treatment apparatus of a sewage treatment plant, which is simple in construction for adsorbing and discharging sludge on a water surface by a rotation axis movement of an adsorption- The present invention relates to a water level variable type sludge treatment device of a sewage treatment plant which is equipped with a water treatment facility.

Conventional wastewater treatment plant is complex plant facility, it is very expensive in terms of economical aspect such as high initial investment cost and renovation cost once it is built, legal aspect to comply with discharged water quality standards, water quality of discharged water station, maintenance It is an important urban infrastructure. Therefore, the sludge disposal facility that meets the biological treatment process, which is the main treatment process, and the decision of the sludge disposal facility due to the extension of the advanced treatment facilities and gun processing facilities will be one of the important factors in planning the sewage treatment plant. Should be determined.

In recent years, most of the sewage treatment plants have been applied to the main treatment process for the purpose of treating organic matter. However, due to the prevention of eutrophication of water bodies, strengthening of water quality standards, It is becoming more and more widespread mainly on the establishment and extension of advanced treatment processes that can remove nitrogen and phosphorus, and the establishment of treatment facilities for guns.

In order to prevent the release of phosphorus from excess sludge in the anaerobic state during sludge thickening or storage and dehydration in consideration of the increase of the biological treatment facility and the enhancement of the treated water quality, an improved facility capable of high concentration within a short period of time need.

On the other hand, conventionally, the organic sludge and the colloidal substance to be treated of the microbial surplus sludge or the mixed sludge, which are generated after the biological sludge of the primary treatment settling tank of the sewage treatment plant and the secondary biological treatment, can be separately treated, It is possible to improve the economical cost reduction and efficiency increase caused by the individual process, to provide the necessary concentration method for establishing and enlarging the advanced treatment facility and establishing the treatment facility for the total phosphorus, minimizing biological release within a short period of time, A technique relating to flotation enrichment for stable and highly concentrated sludge or mixed sludge has been disclosed.

1, the prior art example 1 includes a liquid polymer generating means 10, a mixing means 20, a fine bubble generating means 30, a receiving tank 40, (50).

Since the liquid polymer generating means 10 is the same as the conventional technique described with reference to FIG. 1, a duplicate description will be omitted.

The mixing means 20 includes a venturi tube 21, a stirring tank 22, and a receiving tank 26. The venturi pipe 21 is a component for mixing wastewater and polymer by rapidly changing the flow rate and the flow rate.

The stirring tank 22 is a component for uniformly mixing the wastewater and the polymer by rotating the stirrer 23 by the drive motor 23a.

Particularly, it can be seen that the polymer injection pipes 24a and 24b, into which the polymer is injected, are formed at the front end of the venturi pipe 21 and at the front end of the stirring tank 22. By such a constitution, the flocculation of the sludge is carried out rapidly, and the sludge agglomerated on the piping is prevented from being broken.

A receiving vessel 26 for receiving the mixed water discharged from the stirring tank 22 is provided and a window 25 is formed on one surface of the receiving vessel 26 so that the coagulation state of the sludge can be visually observed Able to know. The injection amount of the polymer can be adjusted according to the result of observation through the window 25. [

The minute bubbles generated in the minute bubble generating means 30 may be directly injected into the receiving vessel 26 of the mixing means 20 or may be injected into the receiving vessel 26 L3. ≪ / RTI >

However, the conventional sludge collecting means 50 includes a pair of chains 53 provided on both sides of the receiving tank 40, a drive sprocket 51 for driving the chain 53, A bracket 54 provided inside the chain 53 and a frame 56 rotatably supported by the bracket 53. The frame 56 is provided with a frame 56, A pair of jigs 57 are protruded and a connecting plate 58 is connected to the lower portion of the jig 57 and a blade 59 is fixed to the lower portion of the connecting plate 58 .

In addition, there is a problem in that there is power loss and frictional noise when the power is transmitted due to the combination of the chain and the sprocket.

In addition, there are a lot of friction parts and link connection parts, which often causes a trouble. In the event of a failure, the maintenance work takes time and cost.

Korean Patent No. 10-1302964

SUMMARY OF THE INVENTION The present invention has been conceived to solve the above-mentioned problems, and its object is to provide a sludge adsorbing and discharging apparatus and a sludge adsorbing apparatus, And a sludge treatment unit for treating the water level of the sewage treatment plant.

Another object of the present invention is to provide a water level variable sludge disposal apparatus for a sewage treatment plant that minimizes a failure factor without interference between components and minimizes the time and cost required for maintenance.

It is still another object of the present invention to provide a water level variable sludge disposal apparatus of a sewage treatment plant which is capable of being quietly driven and minimizing power loss by minimizing an operation site by a rotary shaft drive.

According to an aspect of the present invention, there is provided a sludge mixing apparatus comprising: mixing means for mixing a sludge agglomerating polymer with an incoming sludge; Fine bubble generating means for generating fine bubbles to float the sludge; A receiving tank for receiving the mixed water in which the sludge and the polymer are mixed; And a sludge collecting means for collecting the floating sludge from the receiving tank, wherein the sludge collecting means comprises: an adsorption rotating body installed on the water surface of the receiving tank for adsorbing sludge; A sludge collecting part for collecting and collecting the sludge adsorbed on the circumferential outer periphery of the adsorption rotating body; A discharging device for pumping the sludge collected in the sludge collecting part to forcibly discharge the sludge; And elevating means for elevating and lowering the adsorption rotary body in accordance with the level of the receiving vessel; And lateral movement means for moving the adsorption rotary body in the lateral direction of the accommodation tank to move the adsorption position,

The elevating means includes a vertical rail portion that slidably supports the rotary shaft of the adsorption rotary body in a vertical direction; Buoyancy means formed in the rotating body of the adsorption rotating body; And a longitudinal length varying unit for adjusting the length of the transfer pipe connecting between the pump of the discharge device and the sludge collecting unit according to a water level,

The horizontal moving means includes a horizontal rail portion for guiding the entire adsorption rotary body, the sludge collecting portion and the elevating means so as to be movable in the horizontal direction; A moving device installed on the horizontal rail with one end fixed to the vertical rail and providing power to move the vertical rail along the horizontal rail; And a transverse direction length varying unit for horizontally varying the length of the conveying pipe along the adsorbing rotating body and the sludge collecting unit moved by the moving device. .

Here, the adsorption rotating body may include: a rotating shaft installed across the receiving tank; A cylindrical rotating body coupled to the rotating shaft; And a suction brush which is formed to spread radially on the entire outer periphery of the rotating body and which contacts the receiving surface of the rotating body when the rotating body rotates to absorb the sludge.

The sludge collecting unit may include a knife installed to face the rotating body rotating in the rotational direction of the adsorbing rotary body to scrape sludge adhered to the adsorbing brush; And a receiver for collecting the sludge flowing through the knife.

The present invention as described above can provide a facility with a small cost because the structure for adsorbing and discharging the sludge on the water surface by the rotation axis movement of the adsorption rotating body installed on the water surface of the receiving tank is simple, The failure factor can be minimized, and the time and cost required for maintenance can be minimized.

In addition, the present invention has the effect that the operating portion is minimized by the rotation shaft driving, so that the driving can be quiet, the power loss is small, and the energy efficiency is improved.

Further, in the present invention, when the collecting area of the receiving tank is wide, the direct adsorption rotary body reciprocates laterally in the receiving tank having a large area, without having a separate facility for guiding the float to collect toward the adsorbing rotary body, It is possible to rapidly adsorb suspended solids (sludge), which is economical and has an effect of improving the sludge treatment speed.

1 is a schematic view showing an embodiment of a sewage treatment apparatus according to the prior art;
Figs. 2 to 3 are views showing the essential parts of the embodiment shown in Fig. 1. Fig.
4 is a conceptual view of sludge treatment of a sewage treatment plant according to the present invention.
5 is a schematic view showing a water level variation type sludge treatment apparatus of a sewage treatment plant according to the present invention.
6 is a schematic view showing an example of a longitudinally variable drive of a water level variable sludge treatment apparatus of a sewage treatment plant according to the present invention.
7 is a schematic view showing an example of a lateral variable drive of a water level variable sludge treatment apparatus of a sewage treatment plant according to the present invention.

Hereinafter, an embodiment of the present invention will be described in detail with reference to the accompanying drawings.

4 is a conceptual diagram of sludge treatment of a sewage treatment plant according to the present invention.

Referring to FIG. 4, the sewage treatment plant of the present invention mixes the polymer that agglomerates the sludge with the incoming sludge using the mixing means 110.

Then, fine bubbles are generated using the fine bubble generating means 120 to float the sludge.

The configuration of the mixing means 110 and the fine bubble generating means 120 is the same as that disclosed in Korean Patent No. 10-1302964, and a detailed description thereof will be omitted.

The mixed water in which the sludge and the polymer are mixed is received in the receiving tank 101 and the sludge collecting means 130 is installed in the receiving tank 101 to collect floating sludge.

FIG. 5 is a schematic view showing a sewage treatment plant variable level sludge disposal apparatus according to the present invention, FIG. 6 is a schematic view showing an example of longitudinally variable operation of the sewage treatment plant sewage treatment plant variable level sludge disposal apparatus according to the present invention, The sludge collecting means 130 will be described in more detail with reference to Figs. 6 and 7. Fig. 6 is a schematic view showing an example of a variable lateral drive of the water level varying sludge disposal apparatus of the sewage treatment plant according to the invention.

The sludge collecting means 130 according to the present invention mainly comprises an adsorption rotating body 140, a sludge collecting unit 150, a discharging unit 160, an elevating unit 170, and a lateral moving unit 180.

The sludge collecting means 130 is provided with an adsorption rotating body 140 on the water surface of the receiving tank 101 and sucks the sludge S while rotating.

At this time, a sludge collecting unit 150 is installed on the circumferential outer circumference of the adsorption rotating body 140 to collect and collect the adsorbed sludge S on the surface of the adsorption rotating body 140.

The sludge collecting part 150 is provided with a discharging device 160 to pump the sludge S collected in the sludge collecting part 150 and forcibly discharge the sludge.

At this time, the adsorption rotary body 140 is guided by the elevating means 170, so that the adsorption rotary body 140 can be moved up and down according to the water level of the receiving tank 101.

Hereinafter, each configuration of the sludge collecting means 130 will be described in more detail.

First, the suction rotary body 140 will be described. A rotary shaft 141 is installed across the receiving tank 101. At this time, the rotation shaft 141 is supported by a wall of the receiving tank 101 by a shaft bearing, and the rotation shaft 141 receives rotational force from a power device such as a motor.

A cylindrical rotating body 143 is formed on the rotating shaft 141. At this time, the surface area at which the sludge comes into contact with the rotating body 143 varies in proportion to the diameter of the rotating body 143. The larger the surface area, the more the sludge treatment amount increases.

Therefore, the diameter of the rotating body 143 is designed to have an appropriate diameter in consideration of the treated area of the receiving tank 101 and the sludge disposal capacity.

In addition, the rotating body 143 may be formed in a hollow drum structure in which the inside is hollow. If the rotary body 143 is formed into a hollow drum structure, the weight of the apparatus can be reduced, and the load applied to the rotary shaft can be minimized.

In addition, the suction brush 145 is formed so as to be radially spread on the entire outer circumference of the rotating body 143.

The adsorption brush 145 is densely closed so that the sludge S is adsorbed between the narrow spaces of the adsorption brush 145.

At this time, the adsorption brush 145 may be manufactured using a material having excellent surface tension and adsorbability.

The suction brush 145 contacts the water surface of the receiving tank 101 when the rotating body 143 rotates and rotates together with the rotating body 143 to absorb the sludge floating on the water surface.

Next, the sludge collecting unit 150 will be described as follows.

The sludge collecting unit 150 is provided with a knife 151 so as to face the rotating body 143 rotating in the rotation direction of the adsorption rotating body 140.

The knife 151 has a blade shape facing the longitudinal direction of the outer peripheral surface of the rotary body 143 and is disposed below the horizontal center line of the rotary body 143.

The blade portion of the knife 151 is located at a lower portion of the suction brush 145 that rotates from top to bottom and the gap is opened so that the suction brush 145 can pass through the rotating body 143.

When the suction brush 145 passes the gap between the knife 151 and the rotating body 143, the knife 151 sucks the sludge S adsorbed on the suction brush 145.

At this time, the knife 151 forms a downward inclined surface, so that the sludge S scraped off the adsorption brush 145 flows down on the inclined surface.

A receiving portion 153 is formed below the inclined surface of the knife 151. The receiving portion 153 provides a space for collecting the sludge S flowing on the inclined surface of the knife 151. [

Next, the discharging device 160 will be described as follows.

The discharge device 160 is provided with a pump 161 outside the receiving tank 101. The suction side of the pump 161 is connected to the sludge collecting unit 150 through a transfer pipe 163.

The sludge S collected in the sludge collecting unit 150 is sucked through the transfer pipe 163 by the operation of the pump 161 and discharged to the discharge side of the pump 161.

The sludge S discharged to the discharge side is discarded through a separate process.

Next, the elevating means 170 will be described as follows.

The ascending / descending means 170 also ascends and descends along the adsorbing surface of the adsorption rotating body 140 when the water level in the receiving tank 101 is changed, so that the sludge S can be stably removed.

To this end, a vertical rail portion 171 is provided for slidably supporting both end portions of the rotation shaft 141 of the adsorption rotating body 140 in the vertical direction.

The vertical rails 171 are installed vertically so that a pair of the vertical rails 171 face each other on the inner wall of the receiving tank 101.

A buoyancy means 173 may be further formed in the rotating body 143 of the adsorption rotating body 140.

The buoyancy means 173 is for providing a buoyant force so that the adsorption rotating body 140 always floats on the surface of the water. The buoyancy means 173 may be made of a material such as styrofoam or foamed foam formed to fill the hollow space inside the rotating body 143 have.

The inside of the rotating body 143 may be an empty space, but it is preferable to fill the inside of the rotating body 143 with a separate buoyancy means 173 because of the risk of leakage.

A longitudinal length varying part 175 is provided to adjust the length of the conveyance pipe 163 connecting between the pump 161 of the discharging device 160 and the sludge collecting part 150 according to the water level .

The longitudinal length varying part 175 may be formed in a bellows shape or a double pipe as shown in the drawing. Of course, it is also possible to form the conveyance pipe 163 by using a flexible rubber material to ensure a sufficient margin length.

Further, the sludge collecting unit 150 can be operated to move up and down together with the ascending / descending operation of the adsorption rotating body 140.

For example, the sludge collecting unit 150 may be connected to the rotating shaft 141 of the adsorption rotating body 140 using a connecting rod 155, and a buoyant material (not shown) may be attached to the bottom of the receiving unit 153 of the sludge collecting unit 150 157 can be provided to allow the accompanying elevating operation to be performed.

Next, the lateral movement means 180 will be described.

The transverse moving means 180 includes a horizontal rail portion 181 for guiding the entire adsorption rotary body 140, the sludge collecting portion 150 and the elevating means 170 so as to be movable in the horizontal direction; A movable rail 171 provided on the horizontal rail 181 with one end fixed to the vertical rail 171 and provided with power for moving the vertical rail 171 along the horizontal rail 181, (183); And a transverse length varying part 185 for varying the length of the conveying pipe 163 along the suction rotating body 140 and the sludge collecting part 150 moved by the moving device 183 in the lateral direction .

At this time, the horizontal rail part 181 can be installed inside the receiving vessel 101, but when it is installed inside the receiving vessel 101, it is difficult to manage it due to corrosion or sediment, It is preferable to install it on the outer wall of the receiving tank 101.

Further, the moving means 180 moves by using the power of the motor. The driving means may be a mechanism in which the driving roller is grounded on the horizontal rail portion 181 and is moved on it, or a power transmission such as a chain, belt, rack pinion gear, Or may be moved using an intermediate.

In addition, the transverse length variable portion 185 may be formed of various types of flexible tubing such as a flexible rubber tube, a corrugated tube, a double tube, or the like.

The transverse moving means 180 can be used efficiently when the size of the receiving tank 101 is large.

For example, in the case where the collection area of the receiving tank 101 is wide, the direct adsorption rotating body 140 does not have a separate facility for guiding the suspended matter to be collected toward the adsorption rotating body 140, (Sludge) floating on the water surface while being reciprocated in the horizontal direction on the upper side.

According to the present invention as described above, the floating matters (sludge) floating on the water surface through the lateral direction moving means can be quickly adsorbed, which is economical and the sludge treatment speed can be improved.

This is a design change element that can be changed according to the site conditions of the sewage treatment plant and is not specified in any one form.

The present invention as described above can provide a facility with a small cost because the structure for adsorbing and discharging the sludge on the water surface by the rotation axis movement of the adsorption rotating body installed on the water surface of the receiving tank is simple, The failure factor can be minimized, and the time and cost required for maintenance can be minimized.

In addition, since the operating portion is minimized by the rotation shaft driving, the present invention can be quietly driven, reduce power loss, and improve energy efficiency.

As described above, the present invention is not limited to the above-described specific preferred embodiments, and any person skilled in the art can make various modifications without departing from the gist of the present invention. It is to be understood that such changes and modifications are intended to fall within the scope of the appended claims.

110: mixing means 120: fine bubble generating means
130: sludge collecting means 140: adsorption rotating body
141: rotating shaft 143: rotating body
145: adsorption brush 150: sludge collecting part
151: knife 153: receiving portion
155: connecting rod 157: buoyant material
160: Discharging device 161: Pump
163: conveying pipe 170: elevating means
171: vertical rail part 173: buoyancy means
175: longitudinal length variable portion 180: lateral movement means
181: horizontal rail part 183: moving device
185: transverse length variable portion S: sludge

Claims (3)

Mixing means (110) for mixing the sludge agglomerating polymer with the incoming sludge; Micro-bubble generating means (120) for generating micro-bubbles to float the sludge; A receiving tank (101) for receiving mixed water in which the sludge and polymer are mixed; And a sludge collecting means (130) for collecting floating sludge from the receiving tank (101)
The sludge collecting means 130 includes an adsorption rotating body 140 installed on the water surface of the receiving tank 101 to adsorb the sludge S; A sludge collecting unit 150 for collecting and collecting the sludge S adsorbed on the circumferential outer periphery of the adsorption rotating body 140; A discharging device 160 for pumping and discharging the sludge S collected in the sludge collecting part 150; And elevating means (170) for elevating and lowering the adsorption rotating body (140) in accordance with the level of the receiving tank (101); And lateral movement means (180) for moving the adsorption rotating body (140) in the lateral direction of the receiving vessel (101) to move the adsorption position,
The elevating means 170 includes a vertical rail portion 171 slidably supporting the rotary shaft 141 of the adsorption rotary body 140 in a vertical direction; Buoyancy means (173) formed in the rotating body (143) of the adsorption rotating body (140); And a longitudinal length varying part 175 for adjusting the length of the conveying pipe 163 connecting between the pump 161 of the discharging device 160 and the sludge collecting part 150 according to the water level, ,
The transverse moving means 180 includes a horizontal rail portion 181 for guiding the entire adsorption rotary body 140, the sludge collecting portion 150 and the elevating means 170 so as to be movable in the horizontal direction; A movable rail 171 provided on the horizontal rail 181 with one end fixed to the vertical rail 171 and provided with power for moving the vertical rail 171 along the horizontal rail 181, (183); And a transverse length varying part 185 for varying the length of the conveying pipe 163 along the suction rotating body 140 and the sludge collecting part 150 moved by the moving device 183 in the lateral direction Wherein the sludge treatment apparatus comprises:
The method according to claim 1,
The adsorption rotating body (140) includes a rotation shaft (141) installed across the receiving tank (101);
A cylindrical rotating body 143 coupled to the rotating shaft 141; And
And a suction brush 145 formed to spread radially on the entire outer periphery of the rotating body 143 and adapted to suction the sludge by contacting the water surface of the receiving tank 101 when the rotating body 143 rotates, Sludge treatment system of a sewage treatment plant.
The method according to claim 1,
The sludge collecting unit 150 includes a knife 151 disposed to face the rotating body 143 rotating on the entire rotation direction of the adsorption rotating body 140 to scrape off the sludge S adhered to the adsorption brush 145 ); And
And a receiving part (153) for collecting the sludge (S) flowing through the knife (151).

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