KR200351647Y1 - Wastewater treatment system - Google Patents

Abstract

The wastewater treatment apparatus according to the present invention includes: a coarse sediment remover for introducing wastewater containing solids and condensing and discharging the solids by gravity filtration; A water collecting tank configured to perform a storage function and a flow rate adjusting function of the wastewater discharged from the coarse sediment remover; A reaction tank and agglomeration tank for injecting chemicals into the wastewater introduced from the water collection tank and agglomerating them; It includes a vortex rounding mechanism that increases the flow path of the wastewater discharged from the flocculation tank and includes a flocculation increase sedimentation tank which performs the precipitation function and the flocculation function, so that the wastewater can be easily treated even if there is a change in the quantity and quality of the incoming wastewater. Thus, the installation area of the treatment facility can be reduced, discharged water can be minimized by recycling the purified treatment water, and the amount of waste sludge generated can be reduced to a minimum.

Description

Wastewater treatment system

The present invention relates to a wastewater treatment apparatus, and more particularly, to a wastewater treatment apparatus capable of coping with a considerable range even if there is a change in the quantity and quality of wastewater, such as inflow wastewater generated during excavation work such as a tunnel.

In general, the wastewater generated during excavation work such as tunnels, unlike the wastewater discharged from the stone and cement factories, changes in quantity and characteristics of the wastewater flowing into the wastewater treatment plant from time to time. Most of the time, they are just released.

[Table 1] Cases of Wastewater Characteristics during Tunnel Construction (Direction of Tunnel Wastewater Treatment Plant, Section 5, Roadbed Improvement Work, Janghang Line)

Wastewater Source ph COD SS n-H Generation range Based on design quantity Tunnel work process-Excavation-mine leachate, water-concrete 6-13 50-120 200-500 3-5 50-500% Working vehicle 8-12 150 500 15 Ready-mixed concrete manufacturing facility 6-12 500 200 5

However, if an additional facility with high treatment efficiency is used to treat the wastewater generated during the excavation work such as the tunnel, the installation cost is excessively expensive due to the expensive equipment, and the wastewater treatment facility should be located in the mountainous backcountry. Therefore, the structure is complicated, there is a difficult problem in operation and management.

The present invention was devised to solve the above problems, and it is possible to reduce the installation area of the treatment facility by making it possible to cope with a considerable range even if there is a change in the quantity and quality of the influent wastewater by supplementing the treatment facilities generally used. The purpose of the present invention is to provide a wastewater treatment apparatus capable of minimizing the amount of discharged by recycling the wastewater and reducing the amount of waste sludge to a minimum.

1 is a block diagram showing a wastewater treatment apparatus according to the present invention,

Figure 2 is a detailed view showing the coarse sediment remover in the wastewater treatment apparatus according to the present invention,

Figure 3 is a detailed view showing the round bar vortex device of the flocculation increased sedimentation tank in the wastewater treatment apparatus according to the present invention,

4 is a flowchart illustrating a wastewater treatment process according to the present invention.

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

10: coarse acupuncture remover 11

13: perforated plate layer 13a: porous plate material

13b: filtration member 15: hopper

21: primary neutralization tank 22: stirrer

23 sulfuric acid feeder 25 variable agglomeration tank

26 stirrer 27 polymer feeder

29: selection valve 30: water tank

33: air injection device 41: reactor

42: stirrer 43: aluminum sulfate feeder

45: coagulation tank 46: agitator

47: polymer feeder 50: increased coagulation sedimentation tank

51: sedimentation tank 53: scraper

54: drive motor 55: round bar vortex device

60: filtered water tank 65: filter

70: reuse and backwash tank 80: thickening tank

85: dehydrator

Wastewater treatment apparatus according to the present invention for realizing the above object is a coarse sedimentation remover for injecting wastewater containing the solids and condensing the solids by gravity filtration method; A water collecting tank configured to perform a storage function and a flow rate adjusting function of the wastewater discharged from the coarse sediment remover; A reaction tank and agglomeration tank for injecting chemicals into the wastewater introduced from the water collection tank and agglomerating them; It includes a vortex rounding mechanism for increasing the flow path of the waste water discharged from the flocculation tank is characterized in that it comprises a flocculation increase sedimentation tank to perform the precipitation function and the aggregation function.

Between the coarse immersion eliminator and the sump tank is provided with a neutralization tank and a variable coagulation tank to neutralize and flocculate the effluent by introducing a medicament when the flow rate of the waste water discharged from the coarse immersion eliminator is high or a high concentration of waste water is introduced.

In addition, the wastewater treatment apparatus according to the present invention for realizing the above object, the sedimentation tank to which the wastewater containing the solid flows; A catchment tank configured to perform a storage function and a flow rate adjusting function of the wastewater discharged from the settling basin; A reaction tank and agglomeration tank for injecting chemicals into the wastewater introduced from the water collection tank and agglomerating them; It includes a vortex rounding mechanism for increasing the flow path of the waste water discharged from the flocculation tank is characterized in that it comprises a flocculation increase sedimentation tank to perform the precipitation function and the aggregation function.

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

1 is a block diagram showing a wastewater treatment apparatus according to the present invention, Figure 2 is a detailed view showing the coarse sediment remover in the wastewater treatment apparatus according to the present invention, Figure 3 is agglomeration in the wastewater treatment apparatus according to the present invention Detailed illustration of a round bar vortex device of an increased settling tank is shown.

The wastewater treatment process according to the present invention is a pretreatment process that greatly reduces the removal rate of contaminants and greatly reduces the overall wastewater treatment time, and a main treatment process that automatically adjusts more accurate flocculation reaction and enhances the precipitation effect of the sedimentation tank. As a process, it is divided into the pretreatment process and the post-treatment process to be used when the treated water quality is superior to the water quality treated in the main treatment process.

First, referring to Figure 1, the pretreatment process is to increase the removal rate of pollutants than the facility currently used and to make the first pH adjusted coagulation reaction with a cheap neutralizing agent thereafter, the reaction coagulation tank (41) (45), precipitation tank (50), the sludge thickening tank (80) and the dehydrator (85) facilities to significantly reduce the burden to shorten the treatment time and is a process to ensure the treatment.

The facility performing the pretreatment process performs a complex function of the sedimentation basin, the sedimentation basin, and the filtration, and the coarse sedimentation remover 10 configured to obtain more stable influent water quality, and the design flow rate from the coarse sedimentation eliminator 10. It consists of a primary neutralization tank 21 and a variable agglomeration tank 25 which are operated when more wastewater is discharged than the properties to neutralize and aggregate the wastewater.

The coarse sedimentation remover 10 is provided with a sedimentation tank 11 into which wastewater containing coarse solids flows through the weir 5, and a gravity provided in the sedimentation tank 11 as shown in FIG. 2. The perforated plate media layer 13 for condensing and discharging the solids by a filtration method, and the hopper 15 for collecting and removing the solid precipitated through the perforated plate media layer 13.

The perforated plate media layer 13 is formed of a porous plate (13a) formed with a plurality of holes so that the condensed solids to a predetermined size and the sand or gravel to filter the solids piled up on the porous plate (13a) It consists of the filtration member 13b.

The hopper 15 is connected to the concentration tank 80 to be described later is configured to discharge the collected solids.

The primary neutralization tank 21 receives the sulfuric acid (H ₂ SO ₄ ) from the sulfuric acid feeder 23 when the flow rate of the waste water is large, and neutralizes to a predetermined level, and the variable coagulation tank 25 has a high concentration. When the wastewater flows in, the polymer is supplied from the polymer supplier 27 to aggregate the wastewater neutralized in the primary neutralization tank 210.

The primary neutralization tank 21 and the variable agglomeration tank 25 are each provided with agitators 22 and 26 to increase the neutralization and aggregation efficiency.

In addition, the primary neutralization tank 21 and the variable agglomeration tank 25 are supplied with wastewater through a line branched on the line connected to the collection tank 30 in the coarse sedimentation remover 10, the waste water on the branch line Preferably, a three-way valve, which is a selector valve 29 for controlling the flow, is provided.

Next, the main treatment process automatically adjusts the more accurate flocculation reaction to ensure the treatment, and passes through the vortex rounding device 55 between the reaction flocculation tanks 41 and 45 and the settling tank 50 to the settling tank. Increase the settling effect of (50) and shorten the treatment time.

The facility performing the main treatment process is a collection tank (30) which simultaneously performs the storage function and the flow rate adjustment function of the waste water, and a reaction tank (41) and agglomeration for agglomerating the wastewater introduced from the collection tank (30) by chemicals. The tank 45 is composed of a coagulation increase sedimentation tank 50 that performs a precipitation function and a flocculation function by increasing the waste water flow path.

The water collecting tank 30 is provided with an air injecting device 33 for injecting air to prevent a decrease in capacity due to precipitation of solids to create a turbulent phenomenon inside the water collecting tank 30.

The reactor 41 is supplied with aluminum sulfate from an aluminum sulfate (Al ₂ (SO ₄ ) ₃ ) feeder 43 to make an optimum state so that the wastewater flowing into the collection tank 30 can be aggregated, and the aggregation tank 45 receives a polymer which is a flocculant from a polymer supplier 47 to produce a floc of waste water.

Here, the reaction tank 41 and the coagulation tank 45 are provided with stirrers 42 and 46 for stirring waste water so as to make the reaction time as long as possible. Air stirrers are of course also possible.

The flocculation increase settling tank 50 is precipitated in the settling tank 41 while rotating by the drive motor 54 and the settling tank 51 into which the wastewater discharged from the reaction tank 41 and the flocculating tank 45 flows. It consists of a scraper 53 for removing sludge and a vortex rounding device 55 which is located above the scraper 53 and forms a wastewater inflow path to the sedimentation tank 41 to generate a vortex to increase the aggregation path.

As shown in FIG. 3, the vortex round bar device 55 includes a hopper 56 provided with a plurality of transverse inclined plates 56a in a vertical direction to lengthen a flow path of waste water, and a transverse inclined plate in the hopper 56. It consists of a baffle plate 57 which is located between 56a and rotates in the state installed in the shaft 54a of the drive motor 54.

The hopper 56 is formed in a cylindrical structure in which the waste water passes through the hopper 56 in a vertical direction, and a transverse inclined plate 56a inclined in a reverse cone shape is provided inside the cylindrical structure. In addition, the baffle plate 57 is formed in a disk-shaped structure is located between the transverse inclined plate (56a) and the waste water passing through the hopper 56 flows in a zigzag manner and also serves to prevent the sediment is accumulated. Done.

Such flocculation increase settling tank 50 is reacted after the settling tank 51 if the flocculation time is short and adversely affects the treated water quality, so in order to prevent such a phenomenon in the conventional settling tank vortex injection method (center well) Will be adopted.

Next, the facility for performing the post-treatment process is variable according to the environmental waste discharge allowance criteria and reused water use according to the environmental law as shown in the following [Table 2] filter water tank 60, filter 65, reuse and backwash tank It consists of 70 pieces.

[Table 2] Wastewater Discharge Acceptance Standards (Article 8 of the Water Quality Preservation Act)

(Unit: mg / l)

Regional division Chemical oxygen demand Suspended matter Hydrogen ion concentration Normal Nucleic Acid Remarks Clean area 50 or less 40 or less 5.8 to 8.6 1 or less Applicable Autumn area 90 or less 80 or less 5.8 to 8.6 5 or less My area 130 or less 120 or less 5.8 to 8.6 5 or less Special Area 40 or less 30 or less 5.8 to 8.6 5 or less

The filtered water tank 60 is a water tank for selecting any one of a method of discharging or recycling the treated water treated in the flocculation increasing precipitation tank 50 of the main treatment process.

The filter 65 may be a sand filter, an activated carbon filter, an altitude filter, and the like. Such a filter 65 may be used depending on site conditions and the nature of reused water. Consideration should be given.

The reuse and backwash tank 70 has a storage function for discharging and recycling the treated water, and also has a function of a backwash tank for backwashing the filter.

Meanwhile, the wastewater treatment process according to the present invention includes a sludge treatment apparatus as a pretreatment process, the main treatment process, and other treatment equipment in addition to the equipment used in the aftertreatment process.

The sludge treatment apparatus generally uses a concentration tank 80 and a dehydrator 85, and the concentration tank 80 concentrates and dehydrates the sludge precipitated in the coarse sediment remover 10 and the coagulation increase and settling tank 50. The device for improving the efficiency, the dehydrator 85 is a device for treating as solid waste after dehydration using the sludge concentrated in the concentration tank (80).

Referring to the operation of the wastewater treatment apparatus according to the present invention configured as described above are as follows.

4 is a flowchart illustrating a wastewater treatment process according to the present invention.

Referring to FIG. 4, when the wastewater containing the coarse solid is introduced from the upper portion of the coarse sedimentation remover 10 through the weir 5, the solid is filtered through the filtering member on the perforated plate filter layer 13 to condense and color. Is generated, thereby causing a load to increase the level of the coarse immersion remover (10).

When the water level rises above a certain amount, the solids condensed together with the waste water by water pressure are discharged to the lower side through the porous plate 13a. At this time, the specific gravity of the solidified condensed precipitates is significantly higher than that of water, 15) are collected as they settle into.

Such coarse solids remover 10 is a complex function of the settling basin, sedimentation basin and filtration and it is possible to obtain a more stable influent water quality.

Next, the waste water discharged from the coarse immersion remover 10 is transferred directly to the sump tank 30, but when the waste water discharged from the coarse immersion remover 10 exceeds a design flow rate and a characteristic, the primary neutralization tank 21 is discharged. ) And variable agglomeration tank 25.

That is, if the flow rate of the waste water is large, neutralize to a certain level in the primary neutralization tank 21 into which sulfuric acid (H ₂ SO ₄ ) is introduced, and then into the sump tank 30 to minimize the impact load generated in the main treatment process. When a high concentration of wastewater is introduced, the wastewater passing through the primary neutralization tank 21 is first agglomerated in the variable agglomeration tank 25 into which the polymer is introduced from the polymer feeder 27 to provide sufficient reaction time. It is transferred to the sump (30).

In the sump (30), the storage and flow rate adjustment function of the introduced wastewater is performed, and the wastewater introduced into the reactor (41) and the flocculation tank (45) is aluminum sulfate (Al ₂ (SO ₄ ) ₃ ) and polymer (Polymer). Reaction agglomerates with chemicals such as) to form flocs.

Next, when the wastewater having passed through the reaction tank 41 and the flocculation tank 45 flows into the flocculation increasing sedimentation tank 50, the settling tank 51 is in a state in which the aggregation path and time are increased while passing through the vortex rounding device 55. Since it flows in, the amount of aggregation in the settling tank 51 is increased, so that a more effective precipitation effect can be obtained.

Here, the precipitates in the settling tank 51 are removed by the rotating scraper 53 and transferred to the concentration tank.

Next, the post-treatment process consisting of the filtrate tank 60, the filter 65, reuse and backwash bath 70 is an optional process, and the treatment in the pretreatment process and the main treatment process described above due to failure or repair of equipment and equipment It is used when the water quality deteriorates and when the treated water is to be used for landscaping or reused water.

Therefore, in the filtration tank 60, the treated water treated in the main treatment step is selected for discharge and reuse. When discharge is performed, the filter 65 is bypassed by a filtration pump. It is transferred to the reuse and backwash tank (70), and if the reuse is smooth, it is transferred to the reuse and backwash tank (70) via the filter (65) using a filtration pump.

In the thickening tank (80) of the sludge treatment apparatus, the sludge precipitated in the coarse sediment remover (10) and the flocculation increase and settling tank (50) is concentrated, and in the dehydrator (85), the sludge concentrated in the thickening tank (80) is used. After dehydration, it is treated as solid waste.

Meanwhile, in the above-described embodiment of the present invention, the wastewater treatment apparatus including the coarse immersion remover has been described. However, the water collection tank 30 includes an immersion tank (not shown) which is generally used instead of the coarse immersion remover. ), The reaction tank 41 and the coagulation tank 45, together with the coagulation increase settling tank 50, etc., it will be possible to configure the wastewater treatment apparatus.

Here, the immersion tank may be made of a configuration in which the perforated plate media layer 13 of the coarse immersion eliminator is not provided.

The wastewater treatment apparatus according to the present invention, which is constructed and operated as described above, is composed of a primary neutralization tank, a variable agglomeration tank, and an agglomeration increased sedimentation tank equipped with a round rod vortex device, even if there is a change in the amount and quality of the influent wastewater. Since wastewater treatment is possible, the installation area of the treatment facility can be reduced, discharged water can be minimized by recycling the purified treatment water, and the amount of waste sludge can be reduced to a minimum.

In addition, in the wastewater treatment apparatus according to the present invention, when the coarse sediment remover is included, the coarse sediment remover performs a complex function of sedimentation basin, sedimentation basin, and filtration, thereby obtaining a more stable influent water quality.

Claims (6)

A coarse sedimentation eliminator for introducing wastewater containing solids and condensing and discharging the solids by gravity filtration; A water collecting tank configured to perform a storage function and a flow rate adjusting function of the wastewater discharged from the coarse sediment remover; A reaction tank and agglomeration tank for injecting chemicals into the wastewater introduced from the water collection tank and agglomerating them; Wastewater treatment apparatus comprising a vortex rounding mechanism for increasing the flow path of the wastewater discharged from the coagulation tank comprising a coagulation increase sedimentation tank for performing the precipitation function and the coagulation function. The method of claim 1, The coarse settling eliminator collects solids deposited through the settling tank into which the wastewater containing the coarse solid is introduced, the perforated plate media layer provided in the settling tank to discharge and solidify the solids by gravity filtration. Waste water treatment apparatus comprising a hopper to remove. The method of claim 1, Between the coarse immersion eliminator and the sump tank, when the flow rate of the effluent discharged from the coarse immersion eliminator is high or when a high concentration of wastewater is introduced, a neutralization tank and a variable coagulation tank are provided to neutralize and aggregate the waste water by injecting a medicament. Wastewater treatment unit. The method according to any one of claims 1 to 3, The flocculation increased sedimentation tank is a sedimentation tank into which wastewater discharged from the reaction tank and the agglomeration tank flows, a scraper for removing sludge deposited in the sedimentation tank while being rotated by a driving means, and the wastewater to the sedimentation tank located above the scraper. Wastewater treatment apparatus comprising a vortex rounding device to form a vortex and increase the aggregation path while forming an inflow path. The method of claim 4, wherein The vortex round bar device is a wastewater comprising a hopper provided with a plurality of transverse inclined plate in the vertical direction to lengthen the flow path of the wastewater, and a baffle plate located between the transverse inclined plate in the hopper and rotated by the driving means. Processing unit. A sedimentation tank into which wastewater containing solids is introduced; A catchment tank configured to perform a storage function and a flow rate adjusting function of the wastewater discharged from the settling basin; A reaction tank and agglomeration tank for injecting chemicals into the wastewater introduced from the water collection tank and agglomerating them; Wastewater treatment apparatus comprising a vortex rounding mechanism for increasing the flow path of the wastewater discharged from the coagulation tank comprising a coagulation increase sedimentation tank for performing the precipitation function and the coagulation function.