KR100709321B1 - A floatation tank for cohesion - Google Patents

Abstract

The present invention relates to a flocculation flotation tank having a structure capable of reducing the size of the scale by integrating the flocculation tank and the flotation tank and increasing the collection efficiency of the organic matter contained in the wastewater. A diaphragm dividing the interior to form a coagulation zone and a flotation zone therein, a waste water inlet pipe for introducing waste water and air into the coagulation zone partitioned inside the housing, and fixed to an upper portion of the coagulation zone, and organic matter and microorganisms of the waste water. And a scum removing portion fixed to an upper portion of the floating zone so as to remove scum which is a flocks of flocks which are floated and introduced into the upper portion of the coagulation zone by the diaphragm of the housing. Only the discharge hopper pipe attached to the other side of the housing to discharge the guide scum collected through the scum, and the lower floor water of the floating zone And it characterized in that the configuration twos coagulation injury characterized in that the outlet is composed of a lower layer can be installed in the injury zone to be returned to the process tank.

Cohesive Zone, Floating Zone, Flock, Housing, Scum, Sludge

Description

 A Floatation Tank For Cohesion

Figure 1a is a block diagram showing a conventional floating tank,

Figure 1b is a use state showing the flotation tank and flocculation tank,

Figure 2a is a perspective view showing the flocculation of the present invention,

2B is a state diagram of use of 2A.

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

1: flocculation tank 1a: stirrer

2: flotation 2a: housing

2b: bubble mixing unit 2c: scum removing unit

2c-1: Conveyor Chain 2c-2: Scraper

2d: guide plate 3: discharge hopper pipe

10: housing

11: plate 12: wastewater inflow pipe

12a: Pressurized water inlet tube 13: Outlet hopper tube

14: lower water outlet 20: cohesion zone

21: stirrer 21a: stirring blade

30: floating zone 31: scum removal unit

31a: conveyor chain 31b: scraper

32: pressurized water withdrawal pipe 32a: withdrawal hole

100: flocculation aid 200: pump

300: pressurized tank

The present invention relates to a flocculation tank having a structure that can reduce the size of the scale by integrating the flocculation tank and the flotation tank, and also to increase the collection efficiency of organic matter contained in the waste water. In the process of flocculation after flocculation, the floc is disassembled as a pin floc due to the rapid flow rate and then reaggregated due to the high flow velocity. The present invention relates to an improved flocculation injury.

In general, flotation tanks have a small bubble contained in the waste water to show weight and then remove them by sedimentation sludge (a flocks formed by flocks sinking or floating in water). By attaching microbubble particles to the surface of the floc, the floc (particles of wastewater gathered like snowflakes in the water by chemicals or phosphorus) is lightened and the scum (floating water in the sludge) To rise up) and remove it using a scraper.

However, these flotation tanks need to be supplied with a separate flocculation tank because the flocculation tank is supplied with the organic matter contained in the waste water.

However, these flotation tanks and flocculation tanks have the following problems in their structure.

Hereinafter, the structure and problems together with the accompanying drawings with respect to the conventional flocculation tank and flotation tank will be described in detail.

Figure 1a is a configuration diagram showing a conventional floating tank, Figure 1b is a use state diagram showing the floating tank and flocculation tank.

As shown in Figure 1a and Figure 1b, the flocculation tank 1 and the flotation tank 2 is configured to interlock with each other.

First, the flocculation tank 1 is supplied with a first coagulant through a reaction tank (not shown) and a pH adjustment tank (not shown) of the front end, and is supplied with wastewater having a pH controlled, so that a flocculant contained in the waste water is appropriate. Agitator (1a) is installed and configured to be floc to the size, the main role is a flocculant input determination confirmation space to confirm in advance whether a floe of the appropriate size is formed in the flotation tank (2) flotation flotation to be.

And the floating tank (2) is connected to the coagulation tank (1) through the bubble mixing section (2b) and the pipe is supplied with the pin flocculated waste water during the transfer process, by mixing the pressurized water containing the micro-bubbles It is a principle to remove the floating scum formed by re-aggregation in the rectifying layer in the floating tank 2 through the scum removing unit 2c and to discharge the treated water.

The problem is that some flocculant is required to be reaggregated to the same size once the floc is formed into a floc, which is actually excess, which causes the flocculant component (hard-degradable chemical oxygen (COD) in the treated water. Demand (chemical oxygen demand) source) is a problem that is more mixed and discharged.

Looking at the structure of the floating tank (2), the bubble mixture is provided in the housing (2a) and the pressurized water is installed in the front of the housing (2a) to receive the pressurized water to generate fine bubbles with the waste water supplied from the coagulation tank (1) Conveyor chain (2c-) is installed on the upper portion of the housing (2a) to remove scum formed by the floating of the relatively lighter than the water attached to the bubble through the bubble mixing portion (2b) and the bubble mixing portion (2b) 1) and a scum removing unit 2c consisting of a scraper 2c-2 attached to the outer circumferential surface of the conveyor chain 2c-1, and the housing for discharging the scum collected through the scum removing unit 2c. It consists of the discharge hopper pipe | tube 3 provided in the other side of (2a).

At this time, the bubble mixing portion (2b) is a rotational vortex generated by the pressurized water, it is a structure that is installed relatively higher than the housing (2a) in order to prevent the vortex from affecting the floating tank (2).

Accordingly, the pin floc in the waste water supplied into the bubble mixing portion 2b is mixed with the pressurized water mixed with the fine bubbles, whereby the pin flop is overflowed by the drop into the housing 2a. However, this structure has a problem that the flop is destroyed once again by the drop.

The pin flop overflowed by the drop is evenly introduced into the inside of the housing 2a, and the pin floc in the mixed water is moved into the discharge hopper tube 3 and is formed into a large floc again and contains microbubbles. The flocs are lightened to gather on top of the rectifying layer to form a scum layer and the bottom to form a treated water layer from which the flocs are removed.

These are respectively treated by the discharge hopper pipe through the scum removal unit 2c, and the fresh water from which the flocs are separated is discharged through the treated water outlet of the lower part.

And the inside of the housing (2a) is a structure in which the folded guide plate (2b) is partially stored so as to induce the flow out to the discharge hopper pipe (3). However, such a structure causes a problem that the injured sludge is accumulated at the point A, which is rearward to the guide plate 2b, and accumulates and rots.

Referring to the conventional flocculation tank and floating tank in detail as follows.

1) If the flocks formed in the coagulation tank increase the residence time for a long time due to the inflow or decrease of inflow of water, they find that the flocs become smaller and analyze the cause. It was found that unless a small amount of flocculant was added, no flocks of the original size were formed and many pin flocs were present. This is no different from the phenomena occurring in the destruction of the conveying line and bubble mixture and the reaggregation process in the flotation tank.

2) There is a lack of flocculation conditions due to the fact that the presence of fast flow velocity in the conveying pipe from the flocculation tank to the flotation tank is essential and the rapid stirring vortex in the bubble mixing zone.

3) The problem is that the sludge accumulates in the lower part of the guide plate installed for the smooth removal of the sludge, which is the aggregate of the injured flocks, which is dismantled or decayed after a certain time to make the treated water turbid.

4) The width of the floatation tank is wider according to the amount of treatment, and the weight of the scraper becomes heavier as the length of the scraper increases, which requires the use of a thick chain or an increase in the number, and the sludge layer is thin. problem

Accordingly, the present invention has been made in view of the above problems, and an object of the present invention is to provide a flocculation tank integrated with a flocculation tank and a flotation tank so as to increase the purification efficiency of waste water and reduce the size of the scale. will be.

These objects of the present invention,

A housing, a diaphragm partitioning the inside to form an agglomeration zone and a floating zone in the housing, a wastewater inflow pipe for introducing waste water and air into the agglomeration zone partitioned inside the housing, and fixed to an upper portion of the agglomeration zone. Scum removal part fixed to the upper part of the floating zone to remove the scum which is a flocks of the flotation which is floated to the upper part of the coagulation zone by the diaphragm of the housing, and forms a floc between the organic matter and the microorganism of the waste water. And a discharge hopper pipe attached to the outside of the housing to guide and discharge the scum collected through the scum removal unit, and discharge only the lower layer water of the flotation zone to return to the treatment tank. It is achieved by the flocculation flotation characterized in that it consists of a lower water outflow portion installed in.

In the above, the diaphragm is completely filled to eliminate the drop between the flocculation zone and the flotation zone, and the upper portion is 35 ° to 45 ° toward the flocculation zone to prevent the vortices generated in the flocculation zone from affecting the flotation zone due to the agitator. It is preferred to be partially bent in the range.

In the lower portion of the floating zone is installed a pressurized water withdrawal pipe that traverses the inside to forcibly discharge the lower layer water, it is preferable that a plurality of outlet holes are formed on the outer circumferential surface of the pressurized water withdrawal pipe.

The wastewater inlet pipe is further connected to the pressurized water inlet pipe connected to the pressurized water outlet pipe, and the pressurized water inlet pipe is pumped to form pressurized water in which excess air is dissolved in the lower layer water pumped through the pressurized water outlet pipe. And it is preferably connected to the pressure tank.

Preferably, the scum removing unit is composed of a conveyor chain and a scraper attached to the circumferential surface of the conveyor chain at a predetermined interval.

The lower layer water outlet is formed over the inside of the other side of the housing, it is preferable that the lower portion of the "open" shape is open so that the inflow of the lower layer flows from the lower portion to the upper portion.

The floc is preferably discharged to the discharge hopper pipe through the upper portion of the lower water outlet through the scraper.

In the above, the housing is preferably in the form that the width becomes smaller toward the top so as to increase the collection efficiency of the floc.

Other objects, specific advantages and novel features of the present invention will become more apparent from the following detailed description and the preferred embodiments associated with the accompanying drawings.

Hereinafter, with reference to the accompanying drawings with respect to flocculation injuries according to the present invention will be described in detail.

Figure 2a is a perspective view showing the flocculation flotation of the present invention.

As shown in Figure 2a, the present invention relates to the flocculation flotation tank 100 integrating the flocculation tank and the flotation tank to increase the purification efficiency of the waste water, and also to reduce the size of the waste water.

The flocculation flotation tank 100 is composed of two parts, which is a flocculation zone 20 that receives the wastewater around the diaphragm 11 partitioned inside the housing 10 and flocculates the suspended solids contained in the wastewater. And, the floc is composed of a floating zone 30 to remove the scum formed.

One side of the housing 10 is connected to the waste water inlet pipe 12 for introducing the waste water into the cohesion zone 20, the stirrer 21 is fixed to the upper portion of the cohesion zone (20).

In the stirrer 21, the floating matter contained in the waste water is mixed with the chemicals and the micro-bubbles evenly by the rotation of the stirring blade (21a) and interlocked, so that the floc is formed in the coagulation zone (20).

In addition, the floc of the coagulation zone 20 is pushed by the amount of waste water introduced into the waste water inlet pipe 12 and flows into the flotation zone 30, where the agitator 21 is generated inside the coagulation zone 20. The vortex is blocked by the diaphragm 11 and does not affect the floating zone.

To this end, the diaphragm 11 has a structure in which an upper portion is partially bent toward the cohesion zone 20.

The diaphragm 11 will be described in detail so as to completely eliminate the drop between the flocculation zone 20 and the flotation zone 30, and to avoid interference of the flotation zone 30 of the vortex generated by the agitator 21. The upper portion is partially bent in a range of about 35 ° to 45 ° toward the cohesion zone 20.

When the bending degree of the diaphragm 11 is 35 degrees or less, since the canceling effect of the vortex falls, it is unpreferable, and when it is 45 degrees or more, an upward flow may be loaded and a strong vortex may generate | occur | produce, and a floc may be destroyed, It is not preferable because the vortices generated in the zone 20 impact the upper layer of the flocculation zone 20 and the upper layer of the floating zone 30 after hitting the wall.

In addition, the scum removal unit 31 is fixed to the upper portion of the floating zone 30 to remove the flocks.

The scum removing unit 31 is composed of a conveyor chain 31a and a scraper 31b attached to the circumferential surface of the conveyor chain 31a at regular intervals. Therefore, the scum removing unit 31 is configured to remove the scum by rotation.

The discharge hopper tube 13 is attached to the other outer side of the housing 10 to guide and discharge the scum collected through the scraper 31b of the scum removal unit 31.

In addition, it is a lower water outlet 14 installed inside the floating zone 30 so that only the lower water of the floating zone 30 can be discharged and returned to the treatment tank (not shown).

The lower water outlet 14 is formed over the other inner front surface of the housing 10, and the lower plate is a "plate" structure of the bottom opening is open so that the inflow of the lower water flows from the bottom to the top . At this time, the discharge portion of the lower water outlet 14 is a "slot (long strip)" structure extending to the outside of the housing (10).

Therefore, the discharge hopper pipe 13 and the lower water outlet 14 are mixed at the other side of the housing 10, and the discharge hopper pipe 13 is collected through the scraper 31b and the lower effluent outlet ( It is a structure attached to the rear of the lower water outlet 14 so that the outer upper portion of the 14) can be guided to the discharge hopper pipe (13).

Through such a structure, the scum and the purified lower water can be dualized to completely separate, and the stacking phenomenon of scum generated by the guide plate 2b installed in the existing floating tank 2 can be eliminated.

In addition, the housing 10 has a form in which the width thereof becomes smaller toward the top so as to increase the collection efficiency of the scum. That is, by narrowing the upper portion of the housing 10 in which the scum is collected while maintaining the existing wastewater treatment capacity, the scum layer can be thickened to lower the moisture content and increase the collection efficiency.

In addition, the lower portion of the floating zone 30 is provided with a pressurized water withdrawal pipe 32 for forcibly pulling out part of the lower layer water and then pressurizing it to the flocculation zone 20.

The pressurized water withdrawal pipe 32 is installed across the inside of the floating zone 30 and has a plurality of withdrawal holes 32a to prevent vortex (deflection flow) from occurring due to forced withdrawal of the purified lower layer water. It is formed so that the withdrawal is distributed.

Through this, water does not locally flow into any portion of the pressurized water outlet tube 32, but is introduced into the entire surface of the pressurized water outlet tube 32 to prevent vortex formation.

The pressurized water inlet pipe 32 is connected to the pressurized water inlet pipe 12a, and the pressurized water inlet pipe 12a is connected to the wastewater inlet pipe 12 and flows into the coagulation zone and is mixed.

At this time, the pressurized water inlet pipe 12a is connected to the pump 200 and the pressurized tank 300 which are installed outside the flocculation flotation tank 100, and the lower water pumped through the pressurized water outlet pipe 32 together with the air. It is configured to form pressurized water inflowing into the pressurized tank and dissolving excess air.

Therefore, the wastewater inlet pipe 12 is supplied with pressurized water in which air is saturated and dissolved under high pressure through the pressurized water inlet pipe 12a, and pressurized water has low air solubility in the coagulation zone 20 where the pressure is depressurized, and elutes microbubbles. These microbubbles are flocculated with flotation to form flocs, and the flocs are moved to the flotation zone 30 as it is initially formed without breaking and reaggregating to form scum. The lower the pin plug, the better the injury and the higher the removal efficiency.

2C is a state diagram of use of 2B.

As shown in FIG. 2C, the wastewater is introduced into the coagulation zone 20 formed in the housing 10 through the wastewater inflow pipe 12.

At this time, the waste water inlet pipe 12 is connected to the pressurized water inlet pipe 12a, and the pressurized water in which excess air is dissolved together with the waste water is supplied and mixed. At this time, the pressurized water is withdrawn from the lower layer of the floating zone (30), so that the floating zone-> pressure tank (air melting)-> aggregation zone-(microdissolved elution)-> injured zone (removed from the microbubbles) It is a configuration that is repeated.

Then, in the flocculation zone 20, the suspended solids contained in the waste water are mixed with the microbubbles and flocculating chemicals eluted through the slow stirrer 21, aggregated together, and a large floc is formed.

At this time, the flocs are mixed with fine air bubbles eluted from the pressurized water, and the specific gravity is lightened. When the rectification of the proper flow rate is formed, the flotation floats to the surface and the flocks are accumulated and the scum (floating flocks (oil, etc.) and flocks on the flocks) are accumulated. Is formed.

In addition, the vortices generated in the flocculation zone 20 by the stirrer 21 are bent at the diaphragm 11, and the direction of upward flow in the middle layer is bent into the interior of the flocculation zone 20. There is little to the floating zone (30).

Therefore, scum started to form in the upper layer of the cohesion zone 20 is introduced into the floating zone 30 without being destroyed by the influence of the vortex.

In addition, the flocks introduced into the floating zone 30 form an increasing amount of scum in the floating zone 30 and are floated on the surface of the waste water and are guided to the discharge hopper pipe 13 according to the operation of the scum removing unit 31. Discharged.

And the lower layer water from which the floc is removed is supplied to the treatment tank (not shown) through the lower layer water outlet 14 and discharged or introduced into the next process.

According to the flocculation injuries according to the present invention as described above, there is a feature that can increase the purification efficiency of the waste water, and also reduce the size of the scale.

In addition, since the coagulation tank and the flotation tank are configured integrally, there is an advantage of convenient maintenance.

 The diaphragm is installed along the boundary line that is assumed to be the dead space in the floating tank, and the bubble mixing part and the lower space of the bubble mixing part, which is the inlet pipe connection place in the flocculation tank, are absorbed into the floating tank to form a cohesive area. It has the same capacity as the flocculation tank, and the upper part of the boundary of the dead space becomes a natural slope to the flocculation zone so that the stirring vortex does not affect the flotation area. There is a characteristic that can prevent the phenomenon of floc destruction by the high flow rate.

In addition, in the existing facility, microfluids are contained in small amounts as the pin flocc reaggregates, and the remaining bubbles are attached to the floc surface and floated. The larger the object of the floc, the more bubbles are attached to the surface, so the flocs are relatively lighter, resulting in a faster flotation speed, which allows the smaller flocs to be removed and removed.

In addition, when the waste water supply is stopped in the existing facility, the flocculation tank's flocks, which had no choice but to stay in the flocculation tank, are injured and removed in the flocculation flotation tank. All of these have the advantages resolved.

In addition, the upper part of the flocculation basin is narrowed to make the sludge layer (scum) thick, thereby reducing the moisture content of the sludge removed and additionally reducing the length of the scum removal part by half to reduce the chain and power, thereby reducing the chain and power, and the convenience of maintenance. There is this.

In addition, since the installation area of the existing floating tank is installed up to the flocculation tank with the additional effect obtained in appearance except the processing efficiency obtained from the contents, the required area of the safety belt installed for maintenance and maintenance is reduced by about 30%. It has the advantage of decreasing side effects.

Although the present invention has been described in connection with the above-mentioned preferred embodiments, various other modifications and variations may be made without departing from the spirit and scope of the invention. Accordingly, it is intended that the appended claims cover such modifications and variations as fall within the true scope of the invention.

Claims (8)

Housings, A diaphragm partitioning the inside of the housing such that a cohesive zone and a floating zone are formed in the housing; A waste water inlet pipe for introducing waste water and air into a coagulation zone partitioned inside the housing; A stirrer fixed to an upper portion of the coagulation zone to promote floc formation between organic matter and microorganisms in wastewater; A scum removing portion fixed to an upper portion of the floating zone so as to remove a scum which is a flocks of the flocks which are floated to the upper portion of the cohesion zone by the diaphragm of the housing; A discharge hopper pipe attached to the other side of the housing so as to guide and discharge the collected scum through the scum removing unit;  It is configured to include a lower water outflow portion is installed in the interior of the floating zone to discharge only the lower water of the floating zone to return to the treatment tank, The housing is flocculation injuries, characterized in that the width is reduced to the upper form so as to increase the collection efficiency of the floc. The method of claim 1, The diaphragm is completely refurbished to eliminate the drop between the flocculation zone and the flotation zone, and the upper part is in the range of 35 ° to 45 ° toward the flocculation zone to prevent the vortices generated in the flocculation zone from affecting the flotation zone due to the agitator. Agglomeration injuries characterized in that partially bent to. The method of claim 1, The lower portion of the flotation zone is provided with a pressurized water withdrawal pipe that traverses the inside to forcibly discharge the lower layer water, characterized in that a plurality of outlet holes are formed on the outer circumferential surface of the pressurized water withdrawal tube. delete The method of claim 1, And the scum removing unit comprises a conveyor chain and a scraper attached to the circumferential surface of the conveyor chain at predetermined intervals. The method of claim 1, The lower layer water outflow portion is formed over the inside of the other side of the housing, the flocculation flotation, characterized in that the lower portion is opened in a "┏" shape so that the inflow of the lower layer flows from the lower portion to the upper portion. The method of claim 1, Wherein the scum through the upper portion of the lower water outlet through the scraper flocculation flotation, characterized in that outflow to the discharge hopper pipe. delete

Images