KR200396203Y1 - A Wastewater Disposal Plant for Public Work - Google Patents

Abstract

The present invention relates to a wastewater treatment device for civil engineering, and includes a sedimentation tank (10) for naturally sedimenting and removing suspended solids contained in the wastewater by wastewater and temporarily storing wastewater introduced from the sedimentation tank (10). Neutral agglomeration which neutralizes and aggregates pollutants contained in the wastewater by introducing a flow adjusting tank 20 for adjusting the flow rate of the wastewater to be discharged, and wastewater discharged from the flow adjusting tank 20, and a neutralizing agent and a coagulant are introduced into the introduced wastewater. The neutralizer storage tank 40 for storing the tank 30, the neutralizing agent introduced into the neutralizing agglomeration tank 30, and supplying the stored neutralizing agent to the neutralizing agglomeration tank 30, and the neutralizing agglomeration tank 30 A coagulant storage tank 50 and a flocculant storage tank 50 for storing the coagulant and supplying the stored coagulant to the neutralization agglomeration tank 30 and a flotation medium 62 are installed therein, and the wastewater treated in the neutralization agglomeration tank 30 is filtered. Inflow through (66) The upstream filter 60, which is connected to the upstream filter 60, the treated water tank 70 for storing and reused or discharged to the purified water filtered by the upflow filter 60, and the upstream filter A sludge storage tank 80 connected to the sludge storage tank 80 for storing and treating sludge generated during filtration in the upflow filter 60, and a volume of the sludge by dehydrating water contained in the sludge stored in the sludge storage tank 80; It is composed of a dehydrator (90) that can be treated to minimize the wastewater treatment process can be operated automatically, easy maintenance cost and wastewater treatment management, and wastewater generated by civil engineering work above a certain efficiency can be treated It is possible to easily purify the wastewater within the emission allowance of

In addition, the device configuration is divided into the sedimentation tank (10) and the flow adjustment tank (20) and other facilities, the installation area is smaller than the other waste water treatment device when installed, and the sedimentation tank (10) and the flow adjustment tank (20) Other facilities, except those that can be moved to other places after use, can be reused.

Therefore, it is a very useful design that can drastically reduce the installation cost and operation cost according to the wastewater treatment device and increase the purification efficiency during the civil engineering work that has to be used for a limited time only during the construction period.

Description

Wastewater treatment device for civil construction {A Wastewater Disposal Plant for Public Work}

The present invention relates to a wastewater treatment device for civil engineering, and more specifically, it is designed to effectively treat wastewater generated during construction by using an upflow filter, and to easily move to another place after construction is completed.

In general, a large amount of wastewater containing cement is inevitably generated during the construction of a building, construction of bridges, tunnels, roads, etc. due to the operation of ready-mixed concrete facilities and on-site concrete placement.

In particular, in the tunnel construction, groundwater was used as the water, and a large amount of wastewater containing fine particles such as cement particles and fine powder was generated.

The wastewater generated during civil works exceeds the discharge allowance standard of the Water Quality Conservation Act, and the discharge concentration and discharge allowance standard expected in tunnel construction are shown in Table 1.

   Item   Expected Concentration               Emission allowance standard   Clean area    Autumn area   My area  Hydrogen ion concentration (PH)    7-12   5.8-8.6  5.8-8.6  5.8-8.6  Chemical oxygen demand (COD)   50-200     50 or less    90 or less   130 or less   Suspended Substance (SS)  200-500     40 or less    80 or less   120 or less Normal Nucleic Acid Extract Content Mineral Oil (N-HEX)    1-4     1 or less     5 or less   5 or less

As described above, the wastewater generated in civil engineering should be treated according to the discharge allowance standard, and this treatment method is generally performed by collecting wastewater and then adjusting the pH by adding a neutralizing agent to the neutralized wastewater. The flocculant is precipitated and discharged.

In addition to the precipitation method, various methods are used, such as removing and removing foreign matters in the wastewater.

However, as described above, the wastewater generated during the civil engineering works is treated with various wastewater treatment facilities, such as sedimentation and injuries, but such wastewater treatment facilities are difficult to operate, requiring a professional environmental manager.

In addition, civil engineering wastewater treatment facilities have a large installation area at the time of installation, and a high level of work is required in order to meet the wastewater acceptance criteria by simply treating the wastewater by sedimentation or flotation.

In addition, such a wastewater treatment facility for civil works was demolished and discarded after the completion of the civil work, and there was a problem in that a new wastewater treatment facility should be installed at every civil work.

The purpose of the present invention is to use the upflow filter to treat wastewater generated in civil engineering as an efficient chuck, and it is easy to operate and requires little maintenance cost, and its configuration is compact, so that other civil construction sites after completion of civil construction It is to provide a wastewater treatment device for civil engineering works that can be reused by moving to.

The purpose of this invention and the sedimentation tank (10) for the natural sedimentation and removal of the suspended solids contained in the waste water is introduced into the waste water;

A flow rate adjustment tank 20 for temporarily storing the wastewater introduced from the sedimentation tank 10 to adjust the flow rate of the wastewater discharged;

A wastewater discharged from the flow rate adjustment tank 20, a neutralization flocculation tank 30 for neutralizing and flocculating contaminants contained in the wastewater by introducing a neutralizer and a flocculant into the introduced wastewater;

A neutralizing agent storage tank 40 for storing the neutralizing agent injected into the neutralizing agglomeration tank 30 and supplying the stored neutralizing agent to the neutralizing agglomeration tank 30;

A coagulant storage tank 50 for storing the coagulant injected into the neutralization coagulation tank 30 and supplying the stored coagulant to the neutralization coagulation tank 30;

Floating filter 62 is mounted therein, and the upstream filter 60 in which the wastewater treated in the neutralization condensing tank 30 is introduced and filtered through the filtration pump 66;

A treatment tank (70) connected to the upstream filter (60) for storing purified water filtered by the upflow filter (60) for reuse or discharge to the outside;

A sludge storage tank 80 connected to the upstream filter 60 for storing and treating sludge generated during filtration in the upflow filter 60;

The dehydrator 90 is achieved by dehydrating water contained in the sludge stored in the sludge storage tank 80 to minimize and treat the volume of the sludge.

In other words, by treating the wastewater containing cement during the civil construction through the neutralization coagulation tank 30 and the upflow filter 60, it is possible to obtain a high purification efficiency, easy operation and maintenance.

Preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings.

1 is a schematic view showing a wastewater treatment apparatus for civil engineering, the wastewater is purified through a sedimentation tank, a flow adjusting tank, a neutralizing condensing tank, an upflow filter, and stored as a treatment tank, and sludge generated in an upflow filter It is schematically shown that it is transferred to a sludge storage tank and processed through a dehydrator.

Figure 2 is a cross-sectional view showing the upstream filter of the wastewater treatment apparatus for civil engineering of the present invention, the floating filter is mounted inside the upflow filter, and the inlet pipe for introducing the wastewater into the inside, and discharged sludge generated after the wastewater filtration It is shown that the sludge discharge pipes are each provided.

Hereinafter, as shown in Figure 1, the sedimentation tank 10 of the wastewater treatment device for civil engineering works according to the present invention is introduced into the wastewater generated during the civil engineering work, the sedimentation of the suspended solids (SS) by staying in the wastewater for a predetermined time Remove it.

The sedimentation tank 10 is provided with an oil separation tube 11 so that the specific gravity of the normal nucleic acid extract material (mineral oil) contained in the waste water is light, so that the specific gravity is light and separated from the normal nucleic acid extract material (light). Oil) in terms of specific gravity.

In addition, the flow adjustment tank 20 is connected to the sedimentation tank 10, and the wastewater in which suspended matter (SS) and normal nucleic acid extracting material (mineral oil) are separated from the sedimentation tank 10 is introduced. Save wastewater.

As such, the flow rate adjustment tank 20 stores the entire amount of wastewater generated during civil works, transfers and adjusts it by a predetermined amount to the next process to maintain a constant purification efficiency, and serves to equalize the quality of the wastewater that changes frequently.

A transfer pump 21 is installed inside the flow rate adjusting tank 20 to transfer wastewater stored in the flow rate adjusting tank 20 to the neutralization coagulation tank 30 by a predetermined amount.

At this time, the operation of the feed pump 21 is installed in the flow rate adjustment tank 20, the water level control system 22 is installed by setting the upper limit and the lower limit with the water level control system 22 is controlled by this water level control system 22.

That is, the transfer pump 21 starts the operation at the upper limit water level and stops the operation at the lower limit water level so that the waste water stored in the flow adjusting tank 20 is transferred to the neutralization coagulation tank 30 in a certain amount, and the predetermined amount or more flow rate. The amount of wastewater is adjusted by recycling to the adjustment tank 20.

On the other hand, the neutralization agglomeration tank 30 is connected to the flow rate adjustment tank 20 is continuously transported waste water to the transfer pump 21 in a predetermined amount, dissolving wing 32 for mixing and dissolving the neutralizing agent and flocculant introduced into the inside The melting blade 32 is rotated by the electric motor 33 is installed.

The neutralization coagulation tank 30 is a neutralizing agent and a flocculant is introduced into the incoming wastewater, and the PH meta 34 to detect the pH of the wastewater and detect the water level of the wastewater therein to filter the filter to be described in the upper and lower limits. The water level sensor 31 for operating the pump 66 is provided.

The neutralizing agent and the coagulant introduced into the neutralizing coagulation tank 30 are stored in the neutralizing agent storage tank 40 and the coagulant storage tank 50, respectively, and the neutralizing agent storage tank 40, the coagulant storage tank 50 and the neutralizing coagulation tank 30, respectively. First and second chemical injection pumps 41 and 51 which are operated by the PH meta 34 to inject chemicals from the neutralizing agent storage tank 40 and the coagulant storage tank 50 into the neutralizing agglomeration tank 30 are installed therebetween. .

That is, when a certain amount of waste water flows from the flow adjusting tank 20 into the neutralizing agglomeration tank 30, the PH meta 34 detects this and operates the first chemical injection pump 41 to neutralize the neutralizing agent in the neutralizing agglomeration tank 30 first. The flocculant is introduced into the neutralizing coagulant by the second chemical injection pump 51 while stirring the mixture into the neutralizing coagulant to react the suspended matter (SS), the chemical oxygen demand (COD), and the normal nucleic acid extract material (mineral oil). Material).

And when the water level of the neutralization tank 30 is detected at the upper limit of the water level detector 31, the filtration pump 66 is operated until the lower limit is detected at the water level detector 31 by the effluent formed with an upflow filter. Transfer to (60).

On the other hand, the upstream filter 60 is connected to the neutralization coagulation tank 30, and is operated by the water level sensor 31 between the associated pipes associated with the upflow filter for the wastewater in the neutralization coagulation tank 30. A filtration pump 66 for introducing into 60 is provided.

The filtration pump 66 sets the upper limit and the lower limit by the water level detector 31, and then starts operation when the water level in the neutralization tank 30 is located at the upper limit, and the wastewater is transferred to the upstream filter 60. As the water level is lowered to the lower limit, the operation stops.

As shown in FIG. 2, the upflow filter 60 is formed by dividing the filtration chamber 61a through which wastewater flows in and passing through the horizontal wall 61c. A filtration housing member 61;

A floating filter 62 installed inside the filtration chamber 61a of the filtration housing member 61 and made of a material having a light specific gravity to filter wastewater;

A stirring blade 63 mounted inside the filtration chamber 61a and stirring the inside of the filtration chamber 61a by rotation;

It is provided with a shaft 64a to which the stirring blade 63 is coupled at its end, and rotates the stirring blade 63 by being supplied with electric power, and is mounted inside the equipment chamber 61b of the filtration housing member 61. A rotary motor 64;

One end is connected to the filtration chamber 61a of the filtration housing member 61 and the other end is connected to the neutralization agglomeration tank 30 to transfer wastewater of the neutralization agglomeration tank 30 to the filtration chamber 61a. 65;

A filtration pump (66) mounted to the inlet pipe (65) to transfer wastewater of the neutralization agglomeration tank (30) to the filtration chamber (61a);

One end is connected to the filtration chamber (61a) of the filtration housing member 61, the other end is connected to the sludge storage tank 80, the sludge discharge pipe for transferring the sludge precipitated in the filtration chamber (61a) to the sludge storage tank (80) 67);

It is connected to the filtration chamber (61a) in the upper portion of the filtration housing member 61 is composed of a purified water transfer pipe (68) for transferring the purified purified water to the treatment tank or recycle the initial inlet water to the neutralization coagulation tank (30). All processes are automatically processed by the control part 69.

That is, when the water level sensor 31 detects an upper limit in the neutralization tank 30 and operates the filtration pump 66, the wastewater of the neutralization tank 30 is introduced into the filtration chamber 61a through the inlet pipe 65. Is introduced, and the introduced waste water is passed through the flotation medium 62, and then, after removal of fine particles (fine particulate matter), the purified water thus filtered and purified is transferred to the treatment tank 70 through the purification water transfer pipe 68.

And if the filtration is continuously performed in the upstream filter 60, clogging occurs in the flotation filter 62, the clogging occurs, the flow rate of the waste water is reduced and the filtration efficiency is lowered in this case the filtration pump 66 In the stationary state, the stirring blade 63 mounted in the filtration chamber 61a is rotated by the rotary motor 64 to mechanically stir the flotation media 62 to separate the flocks from the flotation media 62.

When the separation of the flocks in the flotation media 62 is completed, the rotation of the stirring blade 63 is stopped, and when the stirring is stopped, the light flotation media 62 rises due to the specific gravity of the flotation media 62, and the flocs are concentrated sludge. Since the specific gravity is heavy, it is settled under the floating filter 62, and after a predetermined time is discharged through the sludge discharge pipe 67 is transferred to the sludge storage tank (80).

When the drainage is completed, the filtration pump 66 is operated again to introduce the wastewater, and the initial influent is recycled to the neutralization agglomeration tank 30 because the floc mixed in the flotation media 62 may be mixed with the purified water and the filtration efficiency may be reduced. This is selectively made by opening and closing the circulation valve 68a and the purified water transfer valve 68b mounted on the purified water transfer pipe 68.

In addition, as described above, the upstream filter 60 is operated by the filter control unit 69 automatically in all processes such as filtration, washing and stirring of the filter medium, sludge discharge, purified water recycle, and purified water transfer.

The purified water thus treated is stored in the treatment tank 70 and finally inspected the water quality before discharge or reuse, and then reused or discharged to tunnel cooling water, ready-mixed concrete process water, etc. during civil engineering work.

On the other hand, the sludge transferred to the sludge storage tank 80 through the upflow filter 60 is temporarily stored in the sludge storage tank 80 and then dehydrated in the dehydrator 90 after the dewatered sludge is discharged to the outside and treated and dewatered The dewatering liquid generated is transferred to the flow adjusting tank 20 and is recycled.

According to the configuration of the present invention, the wastewater treatment process can be operated automatically, so that maintenance costs and wastewater treatment management can be easily performed, and wastewater generated in civil engineering can be treated at a certain efficiency or higher, thereby allowing wastewater to be discharged within the allowable discharge standard of wastewater. It can be easily purified.

In addition, the device is divided into sedimentation tank, flow adjustment tank and other facilities, so the installation area is smaller than other wastewater treatment devices.In addition, other facilities except the sedimentation tank and flow adjustment tank are easy to move to other places after use. It can be reused.

Therefore, it is a very useful design that can drastically reduce the installation cost and operation cost according to the wastewater treatment device and increase the purification efficiency during the civil engineering work that has to be used for a limited time only during the construction period.

 1 is a schematic view showing a wastewater treatment apparatus for civil engineering

Figure 2 is a cross-sectional view showing an upstream filter of the wastewater treatment apparatus for civil engineering

* Description of the major symbols in the drawings *

10: sedimentation tank 11: oil separation pipe

20: flow rate adjusting tank 21: transfer pump

22: level control system 30: neutralized coagulation tank

31: water level detector 32: melting wing

33: electric motor 34: PH meta

40: neutralizer storage tank 50: flocculant storage tank

60: upflow filter 61: filter housing member

62: floating media 63: stirring blade

64: rotary motor 65: inlet pipe

66: filtration pump 67: sludge discharge pipe

68: purified water transfer pipe 70: treated water tank

80: sludge storage tank 90: dehydrator

Claims (5)

 A sedimentation tank (10) for introducing sewage water to sediment and remove suspended solids contained in the waste water; A flow rate adjustment tank 20 for temporarily storing the wastewater introduced from the sedimentation tank 10 to adjust the flow rate of the wastewater discharged; A wastewater discharged from the flow rate adjustment tank 20, a neutralization flocculation tank 30 for neutralizing and flocculating contaminants contained in the wastewater by introducing a neutralizer and a flocculant into the introduced wastewater; A neutralizing agent storage tank 40 for storing the neutralizing agent injected into the neutralizing agglomeration tank 30 and supplying the stored neutralizing agent to the neutralizing agglomeration tank 30; A coagulant storage tank 50 for storing the coagulant injected into the neutralization coagulation tank 30 and supplying the stored coagulant to the neutralization coagulation tank 30; Floating filter 62 is mounted therein, and the upstream filter 60 in which the wastewater treated in the neutralization condensing tank 30 is introduced and filtered through the filtration pump 66; A treatment tank (70) connected to the upstream filter (60) for storing purified water filtered by the upflow filter (60) for reuse or discharge to the outside; A sludge storage tank 80 connected to the upstream filter 60 for storing and treating sludge generated during filtration in the upflow filter 60; Civil engineering wastewater treatment apparatus comprising a dehydrator (90) to dehydrate the water contained in the sludge stored in the sludge storage tank 80 to minimize and treat the volume of the sludge. The wastewater treatment apparatus according to claim 1, wherein the sedimentation tank (10) is provided with an oil separation pipe (11). According to claim 1, The flow rate adjustment tank 20 is a water level control system 22 is set to set the upper limit and the lower limit to control the operation of the feed pump 21 to the level control system 22 into the neutralization condensing tank 30 Wastewater treatment device for civil engineering, characterized in that the wastewater can be constantly transported. The neutralization agglomeration tank 30 is a neutralizing agent and a flocculant is introduced into the wastewater flowing in, the upper limit and the lower limit by sensing the PH meta 34 and the level of the wastewater by measuring the pH of the wastewater therein. The wastewater treatment apparatus for civil works, characterized in that the water level sensor 31 for operating the filtration pump 66 in the interior. The filtration housing member 61 of claim 1, wherein the upflow filter has a filtration chamber 61a through which wastewater is introduced and passed through, and an apparatus chamber 61b on which a machine can be installed, partitioned by a horizontal wall 61c. )Wow; A floating filter 62 installed inside the filtration chamber 61a of the filtration housing member 61 and made of a material having a light specific gravity to filter wastewater; A stirring blade 63 mounted inside the filtration chamber 61a and stirring the inside of the filtration chamber 61a by rotation; It is provided with a shaft 64a to which the stirring blade 63 is coupled at its end, and rotates the stirring blade 63 by being supplied with electric power, and is mounted inside the equipment chamber 61b of the filtration housing member 61. A rotary motor 64; One end is connected to the filtration chamber 61a of the filtration housing member 61 and the other end is connected to the neutralization agglomeration tank 30 to transfer wastewater of the neutralization agglomeration tank 30 to the filtration chamber 61a. 65; A filtration pump (66) mounted to the inlet pipe (65) to transfer wastewater of the neutralization agglomeration tank (30) to the filtration chamber (61a); One end is connected to the filtration chamber (61a) of the filtration housing member 61, the other end is connected to the sludge storage tank 80, the sludge discharge pipe for transferring the sludge precipitated in the filtration chamber (61a) to the sludge storage tank (80) 67); It is connected to the filtration chamber (61a) in the upper portion of the filtration housing member 61 is composed of a purified water transfer pipe (68) for transferring the purified purified water to the treatment tank or recycle the initial inlet water to the neutralization coagulation tank (30). Civil engineering wastewater treatment apparatus, characterized in that all processes are automatically processed by the control unit (69).