KR100870740B1 - A primary settlement tank for regulating flux - Google Patents

Abstract

A primary settlement tank for regulating flux is provided to reduce the running cost and to easily manage the interface of foreign materials(sludge) by using a forced flow line and a natural flow line without a flow control tank, leaking the flow rate of a sewage and waste water, and by periodically vacating each chamber. A settling tank(110) comprises of a plurality of chambers. A first dispersion tank(120) is comprised in the foreside of the settling tank and distributes equally the sewage in a plurality of chambers. A second dispersion tank(130) is comprised in the backside of the settling tank, mixes the sewage flowed out from the settling tank and distributes into bioreactor. There are the natural flow line(140) and the forced flow line(150) in which the sewage flows between the settling tank and the second dispersion tank. One or more first training walls are included in the chamber. The second dispersion tank communicates with one end of the forced flow line and natural flow line. The second training wall partitions off a mixing room and a distribution room. The first and second training walls are made of double wall structure, and the front/rear wall of the first and second training walls have penetration holes.

Description

Primary Settlement Tank for Regulating Flow {A Primary Settlement Tank For Regulating Flux}

1A and 1B are schematic flow charts showing a wastewater treatment plant equipped with both a flow regulating tank and a primary settling battery according to the prior art;

Figure 2a and Figure 2b is a schematic flow chart showing a wastewater and wastewater treatment plant in which the flow rate adjustment tank is omitted and only the primary settler is provided according to the prior art,

3 is a schematic flowchart illustrating a case where a primary settler battery having a flow rate controllability of the present invention is configured in a sewage and wastewater treatment plant.

Figure 4 is a perspective view showing a primary needle battery capable of adjusting the flow rate of the present invention,

5 is a plan view showing a primary needle battery capable of adjusting the flow rate of the present invention,

6A and 6B are a perspective view and a cross-sectional side view of the first and second flow walls of one configuration of the present invention,

7A to 7C are perspective views showing an operating state of the present invention.

<Description of the symbols for the main parts of the drawings>

100: primary sedimentation battery 110: sedimentation tank

120: first division tank 130: second division tank

140: natural flow line 150: forced flow line

160, 190: First and second flow walls

The present invention relates to a primary sedimentation battery applied to a sewage and wastewater treatment plant. More particularly, the present invention relates to a primary sedimentation cell, and more particularly, to a plurality of chambers in a primary sedimentation cell, and to a wastewater supply to a bioreactor by natural oil and a forced discharge from a selected chamber. The present invention relates to a primary sedimentation battery capable of continuously supplying a certain amount of sewage and wastewater to a bioreactor regardless of the amount of sewage and wastewater introduced from the outside into the sewage and wastewater treatment plant.

In general, as shown in FIGS. 1A and 1B, a wastewater treatment plant has a flow control tank for controlling the inflow of wastewater from the outside, and a primary settler and a bioreactor for removing floating foreign matters contained in the wastewater. Are applied sequentially. That is, the primary sedimentation battery serves as a pretreatment for the biological treatment of the rear stage, so that the sewage and wastewater flowing in stay for a predetermined time to precipitate and separate suspended particles heavier than water by gravity by means of fresh sludge. Substances that are lighter than water are removed through the scum removal device on the water surface and then flow into the bioreactor with natural flow due to no power. The primary sedimentation battery is generally divided into a plurality of chambers divided into predetermined sizes for operation management, and the flow of sewage and wastewater from the primary sedimentation battery to the bioreactor is performed by natural flow due to no power. In this case, the bioreactor is a process of oxidatively decomposing contaminants using aerobic microorganisms through an oxygen supply device, or removing contaminants using random or anaerobic microorganisms, so that an environment suitable for the growth of microorganisms must be maintained and a constant stay is maintained. Time must be maintained to ensure process stability. Therefore, it is desirable that the amount of sewage and wastewater supplied from the primary settler to the bioreactor is always constant.

However, the flow rate of sewage and wastewater flowing into sewage and wastewater treatment plants varies greatly depending on the time of day. For example, the amount of sewage and wastewater increases during the daytime when people are active, and the amount of sewage and wastewater decreases rapidly during the early morning hours when people are not active. However, all structures of sewage and wastewater treatment plants are designed based on the average amount of sewage and wastewater introduced, and bioreactors are designed based on the daily average amount of sewage and wastewater. Therefore, the existing technology is able to buffer the inflow and wastewater volume fluctuated over time by installing a separate flow control tank for stable operation of the bioreactor designed with daily average inflow and wastewater flow.

These flow adjusting tanks are classified into a serial method and a parallel method according to the arrangement method. FIG. 1A is a serial method in which all inflow and outflow water passes through the flow adjusting tank, and FIG. 1B is a parallel method in which only an amount exceeding the maximum daily amount of sewage flows into the flow adjusting tank. to be. Therefore, if the flow rate adjustment tank is installed, it is possible to solve the problems caused by the fluctuations in the inflow and outflow. However, in order to install such a flow rate adjustment tank, since the installation site of a very large area is required, the site purchase cost and facility construction cost, etc. have a high cost.

In order to solve this problem, Korean Patent Registration No. 0493580 "Primary Sedimentation Cell with Flow Adjustment Function and Flow Adjustment Method Using It" omits the flow adjustment tank and returns the sewage precipitated from the primary sedimentation cell to the pumping station before the primary sedimentation battery. The primary settler battery with the adjustment function is proposed. That is, as shown in Figures 2a and 2b is installed so that the pumping station consisting of the inlet pump to transfer the influent sewage to the primary sedimentation battery and the inflow sewage pumped from the pump station to be evenly distributed to each settling tank of the flow control primary sedimentation cell And a conveying device for conveying sewage inside the sedimentation tank from the plurality of settling tanks to the pump station. When the quantity of inflow sewage is insufficient, this technology returns the sewage of any sedimentation tank selected from the sedimentation tank of the primary settling cell for flow rate adjustment to the pump station, and flows the sewage returned to the distribution device by using the inflow pump installed in the pump station. It is a technology to supply equally to each sedimentation tank of adjusting primary sedimentation cell, and the sewage which has already been settled in primary sedimentation cell is sent back to pumping station and pumped up so that the power cost is increased by redundant pumping, and the sewage and sewage water which has settled is sheared. It has an unreasonable process configuration that needs to be reprecipitated by recycling it to the sedimentation tank again. In addition, this technology is required to increase the volume of the primary settler in order to meet the proper surface area load ratio for sedimentation proposed in the sewage system standards by returning the sedimentary sewage in the tank and returning it to the previous process. It has a downside. In order to apply the technology to a facility that is already installed and operated, it is possible to secure an appropriate volume of the primary settler battery, and thus has a limitation in application.

Accordingly, the present invention has been made to solve the above-mentioned problems, and an object of the present invention is to uniformize the amount of sewage and wastewater supplied to the bioreactor regardless of fluctuations in the amount of inflow and wastewater, while omitting a flow adjustment tank requiring a large amount of land area. It is to provide a primary settler battery which can maintain the flow rate, can be flexibly applied irrespective of the volume of the primary settler battery, and can control the flow rate without the unnecessary process of re-precipitating the recycled sewage and wastewater again.

In order to achieve the above object, the flow rate-controlled primary settler battery includes a plurality of chambers in a primary settler cell which discharges sewage and wastewater to a bioreactor by removing floating foreign substances included in sewage introduced from a sewage and wastewater treatment plant. A settling tank consisting of; A first distribution tank configured at the front end of the settling tank and distributing sewage equally to the plurality of chambers; A second distribution tank configured at a rear end of the precipitation tank and equally distributing sewage flowing out of the precipitation tank to the bioreactor; It is characterized by consisting of a natural flow line and a forced flow line in which sewage flows between the settling tank and the second distribution tank.

Two lines are provided between the sedimentation tank and the second distribution tank, in which sewage and wastewater flow. First, the natural flow line includes a plurality of flow paths so that sewage flows into the second distribution tank from the top of each chamber. The plurality of flow paths are configured to join one and communicate with the second distribution tank.

In another line, the forced flow line includes a plurality of flow paths so that the wastewater flows into the second distribution tank from the lower portion of each chamber, and the plurality of flow paths also join together to form the second distribution tank. Configured to communicate.

Each flow passage constituting the forced flow line is configured with a control valve to selectively control the sewage flow from the chamber.

The second distribution tank is configured to communicate with one end of the natural flow line and the forced flow line to temporarily mix the sewage and wastewater flowing from the respective chambers, and to discharge the mixed sewage and wastewater into the bioreactor. It consists of a mixing chamber in which sewage is temporarily mixed and a plurality of distribution chambers in which sewage flows from the mixing chamber and is distributed. The flow wall is configured to control the speed of the flow of waste water from the mixing chamber to the distribution chamber. do.

Hereinafter, with reference to the accompanying drawings will be described in detail a preferred configuration of the present invention.

Figure 3 is a schematic flow chart showing a case where the flow rate adjustable primary sedimentation battery of the present invention is configured in the sewage, wastewater treatment plant, Figure 4 is a perspective view showing a primary sedimentation basin can be adjusted flow rate of the present invention, Figure 5 is 6A and 6B are a perspective view and a side cross-sectional view of a conductive wall of one configuration of the present invention, and FIGS. 7A to 7C are perspective views illustrating an operating state of the present invention.

The primary sedimentation battery capable of adjusting the flow rate of the present invention is composed of three tanks, which is composed of a first division tank, a settling tank, and a second division tank, and the sewage and wastewater flowing out of the pump station by the action of these three tanks is fixed as a bioreactor. It is configured to allow the flow rate to flow out. That is, as shown in FIG. 3, the sewage and wastewater introduced into the pump station 10 are introduced into the primary settler battery 100 capable of adjusting the flow rate of the present invention. In detail, the sewage tank 110 is introduced into the first distribution tank 120. The waste water is evenly distributed to the respective chambers 111), and foreign substances from the waste waters are deposited in each chamber 111 of the settling tank 110 to communicate with the respective chambers 111. The wastewater flows into the second distribution tank 130 through the natural flow line 140 or the forced flow line 150, and the introduced wastewater flows through the rectification process in the second distribution tank 130 through the bioreactor. It is to be leaked to (20).

First, the settling tank 110 has a plurality of chambers 111 formed therein. Each chamber 111 preferably has an inclined gradient at the bottom thereof. By forming such an inclined gradient, the sewage and wastewater naturally introduced in the chamber 111 may flow, and the foreign matter precipitated is deposited on one side so that foreign matters are easily removed.

In addition, in the present invention, as shown in FIG. 4, at least one first conducting wall 160 may be configured at right angles to the flow direction of the wastewater introduced into the chamber 111.

As shown in FIGS. 6A and 6B, the first ditch wall 160 has a double wall structure forming a hollow portion 165. The front wall 161 in the first distribution tank 120 direction, ie, A plurality of through holes 163 are formed at an upper portion of the wall which is first contacted when the waste water flows, and a plurality of through holes 164 are disposed at a lower portion of the rear wall 162 spaced apart from the front wall 161 by a predetermined distance. ) Is formed through the through hole 164 formed in the rear wall 162 through the hollow portion 165 through the through-hole 163 formed in the upper part of the waste water waste water By outflow, it becomes possible to take long residence time in the chamber 111 of sewage and wastewater. By adjusting the number of the first conductive wall 160, the size and number of the through holes (163, 164), the width of the hollow portion 165, the foreign matter by controlling the residence time of the waste water in the chamber 111 It will be possible to settle the sediment and to control the flow rate of sewage and wastewater discharged.

As shown in FIGS. 4 and 5, the first distribution tank 120 communicates with the pump station 10 through a pipe, such as a pipe (not shown.), And temporarily mixes the introduced sewage and wastewater. And a plurality of distribution chambers 122 through which the waste water flows from the mixing chamber 121 and is distributed, and the sewage and waste water introduced from the pump station 10 is equally distributed to the settling tank 110. It is to be able to be introduced into each chamber 111 of. Each of the distribution chambers 122 is configured to communicate with each chamber 111 by a plurality of outlet lines 170, and a control valve 172 is configured in each of the plurality of outlet lines 170 to select the chamber. It is configured to open and close the inflow of sewage and wastewater to (111).

As shown in FIGS. 4 and 5, the second distribution tank 130 communicates with the settling tank 100 and the natural flow line 140 and the forced flow line 150 to temporarily mix the introduced sewage and wastewater. Composed of a mixing chamber 131 and a plurality of distribution chambers 132 through which the waste water flows from the mixing chamber 131 and is distributed, the sewage and waste water introduced from the settling tank 100 is equally distributed to the bioreactor ( 20) to allow the inflow of sewage and wastewater. Each of the distribution chambers 132 is configured to allow the wastewater to flow out into the bioreactor 20 by a plurality of outlet lines 180. In addition, the mixing chamber 131 and the distribution chamber 132 are partitioned by a second conducting wall 190. The second conducting wall 190 also has a hollow portion (as shown in FIGS. 6A and 6B). 195 is formed in a double wall structure, a plurality of through-holes (193) is formed on the front wall 191 in the mixing chamber 131 direction, that is, the wall that first comes in contact with the flow of the incoming waste water A plurality of through holes 194 is formed at a lower portion of the rear wall 192 spaced apart from the front wall 191 by a predetermined distance. 193 and flows into the respective distribution chambers 132 through through holes 194 formed in the rear wall 192 through the hollow portion 195 in the second distribution tank 130 of sewage and wastewater. It is possible to have a long residence time. The residence time of the wastewater in the second distribution tank 130 is adjusted by adjusting the number of the second conductive walls 190, the size and number of the through holes 193 and 194, the width of the hollow portion 195, and the like. It is to be able to adjust the flow rate of the waste water discharged by adjusting.

In addition, the first and second flow walls 160 and 190 may perform the overflow action by forming a plurality of through holes 163 and 193 on the top of the front walls 161 and 191 as well as the rectifying action. .

The natural flow line 140 is composed of a plurality of flow paths 141 so that the waste water flows into the mixing chamber 131 of the second distribution tank 130 from the upper portion of each chamber 111. , The flow of sewage and wastewater by the natural flow line 140 is a flow of the non-power flow, when the waste water is discharged to the upper portion of the chamber 111, the wastewater flows out through the flow path 141, each of these flow path ( Sewage and wastewater outflow through 141 is to be discharged to the mixing chamber 131 through an integrated flow path (142).

On the other hand, the forced flow line 150 has a plurality of flow paths 151 so that the waste water flows into the mixing chamber 131 of the second distribution tank 130 from the lower portion of each chamber 111 It is configured, the forced flow line 150 flows down the waste water from the chamber 111, which is artificially selected to flow out of the waste water through the corresponding flow path 151, through each flow path 151 The flow of sewage and wastewater flows out into the mixing chamber 131 through an integrated flow passage 154. Each of the flow paths 151 may be configured to allow the discharge of sewage and wastewater from the chamber 111 selected by the control valve 152, and the forced flow of the sewage and wastewater into the integrated flow path 154. It would be desirable for the pump 153 to be configured.

Hereinafter, the operating state of the present invention will be described with reference to FIGS. 7A to 7C.

7A and 7B illustrate that when the sewage and wastewater do not flow from the outside of the sewage and wastewater treatment plant, the forced flow lines 150 are sequentially operated in the respective chambers 111 of the sedimentation tank 110 to the bioreactor 20. Figure 1 shows an example showing the process of supplying the sewage and wastewater of a constant flow rate, Figure 7c is the outside of the sewage / wastewater treatment plant does not flow into the wastewater flow in the state that operates the forced flow line 150 When the wastewater flows in from the forced flow line 150, the natural flow by the natural flow line 140, the wastewater and wastewater is supplied to the bioreactor 20 at a constant flow rate, the depleted chamber 111 Figure 1 shows an example showing the process of filling the sewage and wastewater.

In general, the pump station 10 is operated in conjunction with a water level detection by a water level sensor (measurement) (not shown) and a pump (not shown). If the sewage and waste water do not flow, the water level of the pump station 10 drops sharply. Then, the water level sensor installed in the pump station 10 detects this and outputs a signal to the controller (not shown.).

As shown in FIG. 7A, the chamber 111a in the full water level is selected in the settling tank 110 by the signal, and the control valve of the corresponding flow path 151a of the forced flow line 150 configured in the selected chamber 111a ( 152a is opened and the sewage and wastewater of the chamber 111a selected by the operation of the pump 153 flows out into the mixing chamber 131 of the second distribution tank 130. In this case, the sewage and wastewater introduced through the pumping station 10 and the first distribution tank 120 communicate with the corresponding distribution chamber 122a of the first distribution tank 120a so that inflow does not occur into the selected chamber 111a. The control valve 172a of the outflow line 171a is closed. At this time, foreign matter deposited in the selected chamber 111a should be discharged to the outside through the foreign substance discharge line (not shown in the drawing) to prevent the foreign substance from leaking into the second distribution tank 130.

Through this process, the waste water of the selected chamber 111a is completely exhausted, and the water level sensor s of the selected chamber 111a detects this and outputs a signal to the controller. Then, as shown in FIG. 7B, the control unit closes the control valve 152a of the open flow path 151a, selects the other chamber 111b, opens the corresponding control valve 152b, and lowers the other chamber 111b. Waste water flows into the mixing chamber 131 of the second distribution tank 130. At this time, each of the outlet lines (171a, b) in communication with the corresponding distribution chamber (122a, b) of the first distribution tank 120 so that the inflow of waste water into the selected chamber (111a) and the other chamber (111b) does not occur Close all control valves 172a and b. Naturally, the selection of the chamber 111 may be performed by selecting a plurality of chambers simultaneously.

In this process, that is, when the sewage and wastewater of the chambers 111a and b of the sedimentation tank 110 are exhausted in whole or in part, as shown in FIG. 7C, when a sufficient amount of sewage is introduced from the outside, the water level of the pump station 10 is increased. The water level sensor of the pump station 10 detects this and outputs a signal to the controller. Then, the control unit closes the control valve 152b of the flow passage 151b in the chamber 111b from which the sewage and wastewater is discharged, and stops the operation of the pump 153, thereby forcing the flow line 150 of sewage and wastewater. Stop the spill.

And since the sewage and wastewater flowing into the pump station 10 is discharged to the first distribution tank 120, the control valve of the outlet line 170 in communication with each distribution chamber 122 of the first distribution tank 120. 172 is opened in whole or in part. Then, the sewage and waste water distributed evenly by the first distribution tank 120 are introduced into the respective chambers 111 of the settling tank 110. At this time, the sewage / wastewater introduced into the chambers 111c and d in the full water level is discharged to natural oil flow through the sedimentation process and is supplied to the bioreactor 20 through the second distribution tank 130. However, the sewage / wastewater flowing into the chambers 111a and b from which the sewage / waste is depleted is not discharged to the outside until the full water level is reached, and the filling process continues.

On the other hand, if the amount of sewage flowing in from the outside of the sewage and wastewater treatment plant is temporarily insufficient, the flow rate is controlled by limiting the control valve 172 of the outlet line 170 to limit the amount of sewage and wastewater flowing into the depleted chamber 111. Adjust

Those skilled in the art will appreciate that various changes and modifications can be made without departing from the technical spirit of the present invention. Therefore, the technical scope of the present invention should not be limited to the contents described in the detailed description of the specification but should be defined by the claims.

The primary settling battery of the present invention, which is configured as described above, has a fixed amount of sewage and wastewater flow rate using a forced flow line and a natural flow line for sewage and wastewater stored in each chamber of the sedimentation tank without installing a separate flow adjustment tank. It is economical by allowing to flow out of the chamber, and each chamber is emptied periodically to facilitate the interface management of foreign matter (sludge).

In addition, since the primary settling battery which can adjust the flow rate of the present invention does not need to adjust the flow rate of the recycle type, there is no need for a power source according to the recycle and there is no need to perform an unnecessary double precipitation process, which is advantageous in terms of process.

In addition, there is an advantage that a constant flow rate can be supplied by limiting the flow rate of the sewage and wastewater by configuring a flow barrier wall capable of simultaneously performing rectification and overflowing operations in the sedimentation tank and the second distribution tank.

Claims (7)

delete delete delete delete delete delete In the primary sedimentation battery which removes the floating foreign matter contained in the sewage flowing into the sewage treatment plant, and discharges the sewage into the bioreactor, A settling tank composed of a plurality of chambers; A first distribution tank configured at the front end of the settling tank and distributing sewage equally to the plurality of chambers; A second distribution tank configured at a rear end of the settling tank and mixing sewage flowing out of the settling tank to be distributed to the bioreactor; Characterized in that consisting of the natural flow line and the forced flow line and the sewage flow between the sedimentation tank and the second distribution tank, The chamber is configured with one or more first barrier walls, The second distribution tank communicates with one end of the natural flow line and the forced flow line, and includes a mixing chamber in which sewage is stored, a plurality of distribution chambers in which sewage flows from the mixing chamber, and partitions the mixing chamber and the distribution chamber. Consisting of a ditch wall, The first and second conductive walls have a double wall structure, and a plurality of through holes are formed in an upper portion of the front wall, and a plurality of through holes are formed in a lower portion of the rear wall thereof.

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