KR20180012985A - Method and system for treating high-concentrated industrial wastewater - Google Patents

Abstract

The present invention relates to a high-concentrated industrial wastewater purifying method and a high-concentrated industrial wastewater purifying system capable of purifying high-concentrated wastewater discharged from an industrial facility to water quality which can be discharged to a river or a stream or to water quality which can be discharged to a wastewater treatment plant in an industrial complex. As technical means for solving the object, the high-concentrated industrial wastewater purifying system comprises: a stirring device; a buffer storing tank; an electrolysis device; an evaporation concentrating device; and a multi-layer composite filter. The stirring device includes a wastewater storing tank and a precipitation purifying agent storing tank, thereby stirring high-concentrated wastewater supplied from the wastewater storing tank, and a precipitation purifying agent supplied from the precipitation purifying agent storing tank. The buffer storing tank removes precipitate precipitated by the precipitation purifying agent from the high-concentrated wastewater passing the stirring device. The electrolysis device electrolyzes the wastewater from which the precipitate is filtered through the buffer storing tank. The evaporation concentrating device evaporates and concentrates polluted water passing the electrolysis device. The multi-layer composite filter filters the polluted water passing the evaporation concentrating device.

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a high concentration industrial wastewater purification method and a high concentration industrial wastewater purification system,

The present invention relates to a high-concentration industrial wastewater purification method and a high-concentration industrial wastewater purification system, which can purify wastewater discharged from an industrial facility to a level sufficient to discharge the wastewater into a river or a river or to send it to a wastewater treatment plant in an industrial complex The present invention relates to a high concentration industrial wastewater purification method and a high concentration industrial wastewater purification system,

Due to industrialization and industrialization, human civilization has made remarkable progress, and various civilizations have helped to enrich people's lives. On the other hand, environmental pollution and water pollution have progressed seriously due to industrialization and industrialization, and this poses a serious threat to human civilization. Therefore, wastewater discharged from industrial facilities or factories must be purified to meet certain standards and discharged to rivers and streams. In the case of industrial parks, wastewater discharged from tenant enterprises is purified and discharged at a joint wastewater treatment plant . Today, it is imperative to have wastewater treatment facilities in most factories that cause wastewater.

Particularly, in the case of companies residing in the industrial complex, the concentrations of wastewater discharged are different because the types and concentrations or the amounts of chemical used in each factory are different. Therefore, there is a considerable difficulty in collecting and purifying various wastewater discharged from these factories collectively. In particular, when collecting wastewater of low concentration and wastewater of high concentration collectively without any distinction, In addition to increasing costs, there may be disputes over wastewater treatment costs sharing between companies that produce low-concentration wastewater and those that produce high-concentration wastewater. Therefore, the enterprises in the industrial parks regulate the pollution level of the wastewater discharged to the common wastewater treatment plant to be below a certain level. As a result, the enterprise that discharges the high concentration wastewater is required to have a high concentration Wastewater should be purified by low-concentration wastewater to a level that can be sent to a joint wastewater treatment plant or entrusted to an external treatment facility. However, even if the wastewater of a high concentration is intended to be treated in an external treatment facility, the wastewater can not be entrusted to an external facility because it often restricts the amount of pollutants discharged outside the wastewater treatment plant. Therefore, in the case of a company that discharges a high concentration of wastewater, a purification facility capable of minimizing the amount of wastewater or pollutants in the high-velocity furnace that can purify wastewater discharged at a low concentration and transfer it to the outside is required have.

KR 10-2015-0079378 A KR 10-2002-0034003 A KR 10-1995-7002175 A KR 10-1165708 B1

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned problems, and it is an object of the present invention to provide a high concentration of industrial wastewater which can be cleaned with clean water at a high level capable of discharging industrial wastewater into a river or a river, An industrial wastewater purification method and a high concentration industrial wastewater purification system.

The present invention as a technical means for solving the above problems is characterized in that a wastewater storage tank and a sedimentation purifying agent storage tank are provided and a stirring apparatus for mixing a high concentration wastewater supplied from the wastewater storage tank with a sedimentation purifying agent supplied from the purifying agent storage tank ; A buffer reservoir for removing the sediment precipitated by the sedimentation-purifying agent in the high-concentration wastewater passed through the agitation device; An electrolytic device for electrolyzing the wastewater filtered by the precipitate through the buffer reservoir; An evaporation concentrator for concentrating the polluted water passing through the electrolytic apparatus by evaporation; And a multi-layered composite filter for filtering the polluted water through the evaporation concentrator.

In a preferred embodiment of the present invention, the stirring device may be configured as a static mixer.

In a preferred embodiment of the present invention, a filter membrane may be provided in the upper portion of the inlet of the contaminated water supplied from the static mixer in the inside of the scavenge buffer reservoir.

In a preferred embodiment of the present invention, the filter membrane may be configured such that the direction of the polluted water inlet is high and the opposite direction of the polluted water inlet is low.

In a preferred embodiment of the present invention, the sediment discharged to the lower portion of the buffer reservoir is separated into liquid wastewater and solid-phase wastewater through a filter press so that the wastewater returns to the buffer reservoir and the sludge is discharged.

In a preferred embodiment of the present invention, a high-concentration evaporator is further provided between the evaporation concentrator and the multi-layered composite filter, and the residual concentrate remaining after evaporation in the evaporation concentrator can be evaporated once again.

In a preferred embodiment of the present invention, the evaporation concentrator or the high concentration evaporator is characterized in that the evaporator is heated and evaporated under a negative pressure.

According to a preferred embodiment of the present invention, the evaporation concentrator further includes a deodorization unit to neutralize the gas generated from the evaporation concentrator, wherein the deodorization unit has a hollow interior and a plurality of storage spaces A plurality of vertical chambers are formed, and the neutralizing liquid is stored in the plurality of storage spaces, so that the gas introduced into the container body can be neutralized by the neutralizing liquid stored in the storage space.

In a preferred embodiment of the present invention, the high-concentration evaporator further includes a deodorizing unit to neutralize the gas generated from the high-concentration evaporator, wherein the deodorizing unit has a hollow interior and a plurality of storage spaces The neutralizing liquid is stored in the plurality of storage spaces so that the gas introduced into the container body is neutralized by the neutralizing liquid stored in the storage space.

In a preferred embodiment of the present invention, the deodorizer has a pipe extending from the outside to a lower portion of the first storage space of the container body so that the discharge port is located adjacent to the water surface of the neutralizing liquid stored in the lower portion of the storage space, The remaining storage space may be provided with a pipe communicating with the upper portion of the storage space immediately adjacent to the storage space and extending to a lower portion of the storage space so that the discharge port is positioned adjacent to the water surface of the neutralization liquid stored in each storage space.

In a preferred embodiment of the present invention, an injection nozzle is provided on the upper portion of each of the storage spaces, and the neutralized liquid filled in the lower portions of the respective storage spaces is sprayed.

The method for purifying high-concentration industrial wastewater according to the present invention includes the steps of stirring high-concentration wastewater and a precipitating purifying agent; Storing the wastewater having undergone the stirring step in a buffer reservoir to perform sedimentation purification; Electrolyzing the wastewater through the sedimentation purification step; Evaporating the wastewater through the electrolysis step; And filtering the wastewater subjected to the evaporation and concentration step through a multi-layered composite filter.

In a preferred embodiment of the present invention, the stirring step may be performed by using a static mixer to stir the waste liquid from the high concentration wastewater and the waste liquid extracted from the food wastes.

In a preferred embodiment of the present invention, the sedimentation purification step includes a step of storing the wastewater subjected to the stirring step in a buffer reservoir to discharge a solid precipitate to the lower part, and an upper part of the inlet port through which the wastewater flows into the buffer reservoir, It is possible to prevent sediment of the solid phase contained in the wastewater from being discharged to the discharge port.

In a preferred embodiment of the present invention, the filtration membrane is configured such that the inlet port is higher than the inlet port, and the opposite side of the inlet port is lower, so that the wastewater flowing into the buffer reservoir can pass through the filtration membrane step by step.

In a preferred embodiment of the present invention, the evaporating and concentrating step may heat the wastewater flowing into the evaporation concentrator by heating under a negative pressure.

In a preferred embodiment of the present invention, the next step of the evaporation and concentration step may further include a concentration and evaporation step of evaporating the evaporation and evaporating the remaining concentrate once again under a negative pressure.

In a preferred embodiment of the present invention, the precipitating and purifying step further includes a filter pressing step to pressurize the sediment discharged in the sedimentation purification step to extract liquid wastewater, and then to purify the liquid wastewater again You can send it back.

In a preferred embodiment of the present invention, the evaporating and concentrating step may further include a deodorizing step of neutralizing and neutralizing the gas discharged without being neglected in the evaporating and concentrating step to the neutralizing liquid.

In a preferred embodiment of the present invention, the deodorization step includes a neutralizing liquid composed of strong alkaline water or deuterated chloric acid in a plurality of storage spaces, and gas discharged in the evaporating and concentrating step is passed through the neutralizing liquid to neutralize .

According to the high concentration industrial wastewater purification method and the high concentration industrial wastewater purification system according to the present invention, relatively clean low concentration wastewater is discharged to the common wastewater treatment plant in the industrial complex and the high concentration of pollution is separated from the high concentration industrial wastewater. Water or sludge to the outside treatment facility to reduce the cost of wastewater treatment, as well as to comply with the wastewater treatment regulations. According to the high concentration industrial wastewater purification method and the high concentration industrial wastewater purification system according to the present invention, contaminants in the industrial wastewater at a high concentration can be removed at low cost.

1 is a system diagram showing a schematic configuration of a high concentration industrial wastewater purification apparatus according to the present invention.
2 is a view showing a detailed configuration of a high concentration industrial wastewater purification apparatus according to the present invention.
Fig. 3 is a view showing an example of a steric characteristic according to the present invention; Fig.
4 is a view showing a configuration of a buffer storage according to the present invention;
5 is a view showing a configuration of a deodorizing unit according to the present invention;

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

FIG. 1 is a system diagram showing a schematic configuration of a high concentration industrial wastewater purification apparatus according to the present invention, and FIG. 2 is a view showing a detailed configuration of a high concentration industrial wastewater purification apparatus according to the present invention.

1 and 2, the high concentration industrial wastewater purification apparatus according to the present invention includes an agitation apparatus 100, a buffer reservoir 110, an electrolysis apparatus 130, an evaporation concentrator 150, a high concentration evaporator 155, A multi-layer composite filter 170, and a purified water storage tank 190.

The stirring apparatus 100 is a device for mixing and mixing a high concentration wastewater discharged from an industrial site with a sedimentation-purifying agent. Therefore, in the previous stage of the stirring apparatus 100, a wastewater storage tank 103 for temporarily storing the contaminated water at a high concentration discharged from a factory or the like before being input to the agitation apparatus 100, and a cleaning agent storage tank 105 for storing the precipitation cleaning agent And may be connected to the stirring device 100. The sedimentation-purifying agent is primarily purified by precipitating the polluted water, and various precipitating-purifying agents which react with the components of the respective polluted water to cause sediment can be used. Examples of the sedimentation-purifying agent according to the present invention include a desolvation solution extracted from food waste disclosed in Korean Patent Publication No. 2015-0080698 filed by the applicant of the present invention. However, the above-described sedimentation-purifying agent is an example of the present invention. It is needless to say that any known purifying agent may be used as long as it is a purifying agent that reacts with a specific component or various components contained in wastewater to produce a precipitate.

Fig. 3 is a view showing a configuration of a steric characteristic which is an example of a stirring apparatus according to the present invention.

1 and 3, the stirring apparatus 100 is a device for mixing a high concentration wastewater with a sedimentation-purifying agent. Therefore, various known apparatuses can be applied as long as they can effectively mix the wastewater and the sedimentation-purifying agent. However, in a preferred embodiment of the present invention, the stirring device 100 may be a static mixer. As shown in FIG. 3, the static mixer may include a screw or a blade 109 having a variety of structures inside the tube 107, so that two or more liquid or gas- And a gel component is injected and stirred. At this time, the screw 107 or the blades 109 provided inside the tube 107 are not continuously provided, so that the substances passing through the tube 107 are effectively mixed. The detailed description of the static mixer is omitted because it is well known in the art.

4 is a view showing a configuration of a buffer storage according to the present invention.

1 and 4, high-concentration wastewater having passed through the agitation apparatus 100 flows into the buffer reservoir 110 and undergoes a precipitation process. That is, when the high concentration wastewater and the sedimentation purifying agent are mixed in the stirring apparatus 100, some of the wastewater reacts with the sedimentation purifying agent to become a solid or gel state, and the heavy sediment sinks to the bottom. The buffer storage tank 110 is a tank having a storage space 162 therein and one side connected to the stirring apparatus 100 through a transfer pipe and the lower side having a hopper 111 structure, 111, a sediment discharge pipe 112 and a valve 113 for opening and closing the sediment discharge pipe 112 are provided. The wastewater flows into the buffer reservoir 110 in a state where the wastewater of high concentration is mixed with the precipitating agent through the agitating device 100 and after a certain time, the wastewater reacts with the precipitating purifying agent, resulting in a solid or gel- I will sit down. When the sediment sinks to a certain extent in the lower portion of the buffer tank 110, the valve 113 of the sediment discharge pipe 112 is opened to discharge the sediment. The separated precipitate and wastewater are transferred to the next stage through the above process.

In a preferred embodiment of the present invention, a filter membrane 115 may further be provided in the buffer reservoir 110. The filtration membrane 115 is provided at an upper portion of the inlet 117 into which the contaminated water supplied from the agitation apparatus 100 flows into the buffer reservoir 110. More preferably the filtration membrane 115 is provided at the contaminated water inlet 117 ) Direction and the opposite direction of the contaminated water inlet 117 is lowered. And a drain pipe 119 through which the wastewater from the buffer reservoir 110 flows to the next process may be provided on the upper portion of the filter membrane 115 in the direction opposite to the inlet port 117. As described above, in the buffer reservoir 110, the sediment sinks to the bottom, but some fine particle sediment still floats in the wastewater. During the supply of the new wastewater to the buffer tank 110, the sediment that has sat on the bottom also floats to the top. The filter membrane 115 prevents the particles of the precipitate from flowing to the discharge tube 119 and proceeding to the next process. The surface area of the filter membrane 115 is increased by inclining the filter membrane 115 and the wastewater flowing into the buffer reservoir 110 is sequentially filtered from the lower part to the upper part along the inclined surface of the filter membrane 115 It is possible to prevent a large amount of pressure from being applied to the filter membrane 115 at the same time. According to the present invention, the filtration membrane 115 may be a cloth or a cotton having a thickness of about 1 to 2 mm or so, And the like.

Meanwhile, the sediment discharged to the lower portion of the buffer tank 110 is separated into liquid and solid sludge via the filter press 120, and the liquid wastewater is returned to the buffer storage tank 110 and the sludge is separately stored . The sludge is entrusted to an external treatment facility that specializes in high concentration of pollutants. Since a considerable number of industrial complexes are limited in the amount of pollutant water that can be discharged to the outside, it is possible to comply with the pollutant removal regulations by separating and disposing high-concentration pollutants or sludge from waste water. The filter press 120 is a known constitution in which the sediment is pressurized to separate the solid and the liquid, and then the separated liquid is separated by passing through the filter.

The high concentration industrial wastewater purifying apparatus according to the present invention may include a plurality of buffer storage tanks 110 having the above-described structure. The filtration membrane 115 may be provided only in the first buffer storage tank 110 or may be provided in all or a portion of the plurality of buffer storage vessels 110. In this case, You may. If necessary, particles of water pores may be formed in the buffer membrane 115 of the buffer reservoir 110, which is provided in the front half portion of the buffer reservoir 110 provided in the rear half of the plurality of buffer reservoirs 110, It is possible to finely constitute so that precipitates of small particles can be filtered out. The wastewater filtered by the precipitate through the buffer reservoir 110 is supplied to the electrolytic apparatus 130.

The electrolytic apparatus 130 is an apparatus for separating various kinds of pollutants including electrodes by applying electrodes to the wastewater and including metallic contaminants. In the high concentration industrial wastewater purification apparatus according to the present invention, various known electrolytic apparatuses 130 can be applied under various conditions depending on the kind of wastewater to be treated. The electrolytic apparatus 130 is a well-known technique generally used in a wastewater treatment process, and a detailed description thereof will be omitted. The wastewater that has passed through the electrolytic apparatus 130 is supplied to the evaporation concentrator 150.

The evaporation concentrator 150 separates contaminants of heavy particles contained in the wastewater by evaporating the wastewater and includes a heating device (not shown), a decompression device (not shown), a condensing device (not shown) and a deodorization part 160, As shown in FIG. The heating device heats the evaporation concentrator 150 and the decompression device reduces the internal pressure of the evaporation concentrator 150. The vaporized water is heated again while maintaining the internal pressure of the evaporation concentrator 150 at a negative pressure (a pressure lower than atmospheric pressure) to evaporate the wastewater. The evaporated gas is again liquefied through the condenser, . The gas which has not yet condensed through the condenser is deodorized and neutralized through the deodorizer 160 and then discharged to the atmosphere. The configuration of the deodorization unit 160 will be described later. The high concentration wastewater which is evaporated through the evaporator 150 may be stored separately and then entrusted to a consignment processing facility for treatment.

In the meantime, the high concentration industrial wastewater purification apparatus according to the present invention may further include a high concentration evaporator 155 between the evaporation concentrator 150 and the multi-layer composite filter 170. In the case of separating contaminants by evaporating wastewater through the evaporator 150, the higher the concentration of contaminants, the higher the heat of evaporation. Therefore, it is evaporated through the evaporation concentrator 150 to a predetermined concentration rather than being evaporated at a time through the evaporation concentrator 150, and the high concentration wastewater having a predetermined concentration or higher is separately collected and evaporated again through the high concentration evaporator 155 It is efficient. The high concentration evaporator 155 can be constructed in the same manner as the evaporation concentrator 150 described above. The liquefaction of the gas, the deodorization of the gas and the treatment of the contaminated water at a high concentration caused by passing through the high concentration evaporator 155, And is the same as the concentrator 150. The wastewater distilled through the evaporation concentrator 150 and the high concentration evaporator 155 is transferred to the multi-layer composite filter 170.

The high-concentration residue remaining after evaporation distillation in the evaporation concentrator 150 or the high concentration evaporator 155 is stored in the concentrated liquid storage tank 125 and is then discharged to a specialist wastewater treatment facility for treatment or treatment of a high concentration wastewater. It can be transferred to a purification device and processed. In the case where only the evaporation concentrator 150 is provided as described above, the evaporation concentrator 150 can be used as the evaporation concentrator 150. In the case where the evaporation concentrator 150 is provided together with the high-concentration evaporator 155, And then the secondarily distilled residue in the high concentration evaporator 155 is stored in the concentrated liquid storage tank 125. [

The multi-layered composite filter 170 is composed of a filter composed of a plurality of stages and distilled through an evaporation concentrator 150 and a high concentration evaporator 155, and then re-liquefied wastewater is filtered through the multi-layered composite filter 170. The multi-layer composite filter 170 is divided into a plurality of stages so that each section is filled with activated carbon, sand, zeolite, and other minerals having excellent filtration effects. The filtration material to be filled in each compartment can be appropriately controlled depending on the type of wastewater. The wastewater filtered through the multi-layered composite filter 170 is stored in the purified water storage tank 190 and then discharged to the outside or sent to the wastewater treatment plant in the industrial complex according to the water quality.

Meanwhile, the wastewater evaporated and vaporized in the evaporation concentrator 150 and the high-concentration evaporator 155 described above is liquefied through the condenser and then supplied to the multi-layered composite filter 170 described above. In this process, The gas is deodorized and filtered through the deodorizer 160 and then discharged to the outside.

5 is a view showing an example of a deodorizing unit according to the present invention.

5, the deodorization unit 160 of the high concentration industrial wastewater purification apparatus according to the present invention includes a container body 161 having a hollow interior and a plurality of storage spaces 162 separated from the inside of the container body 161 And a neutralization liquid is stored inside the storage space 162. The vertical partition 163 may be formed of a plurality of vertical partitioning walls 163. Thus, the gas which has not been condensed in the process of passing through the condenser can be deodorized, neutralized, and then discharged to the outside while passing through the storage space 162 in which the neutralization liquid is stored.

The deodorization unit 160 includes a plurality of storage spaces 162 separated from each other as described above. And the neutralizing liquid exposure pipe 164 introduced from the outside extends to the lower portion of the first storage space 162a of the container body 161 so that the discharge port of the neutralizing liquid exposure pipe 164 is stored in the storage space 162 The discharging port of the neutralizing liquid exposing pipe 164 may be located adjacent to the water surface of the neutralizing liquid filled in the lower part of the storage space 162. [ A gas having a constant pressure exiting the discharge port of the neutralization liquid exposure pipe 164 is discharged while aeration is performed in the neutralization liquid while strongly pushing the neutralization liquid stored in the storage space 162, Lt; / RTI > The neutralizing liquid exposure pipe 164 communicating with the upper portion of the adjacent storage space 162 extends to the lower portion of the storage space 162 in the remaining storage space 162b except for the first storage space 162, And the outlet of the neutralizing liquid exposure pipe 164 is provided at a position adjacent to the water surface of the neutralizing liquid stored in each of the storage spaces 162. [ Thus, in the first storage space 162, the polluted gases that have been washed off while being connected to each other are connected to each other and then continuously moved into the storage space 162, and aeration is performed in the neutralization liquid in the same manner. The neutralized solution stored in the storage space 162 may be composed of a basic solution such as a solution of an alkaline component such as strong alkaline water or a solution of hypochlorous acid or the like, and the alkaline solution or the basic solution may be alternately stored. That is, if the alkaline solution is stored in the first storage space 162a, the acid solution may be stored in the second storage space 162b. Thus, the alkaline solution neutralizes the acidity contained in the gas, and the acidic solution can neutralize the alkalinity. Further, if necessary, a part of the storage space 162 may include various known deodorants. The deodorant may be selected to suit the constituents of the contaminants contained in the wastewater. Meanwhile, although not shown in the drawings, the neutralizing liquid exposure pipe 164 according to the present invention may be configured so that the outlet is submerged in the neutralizing liquid. Thus, the gas discharged through the discharge port can be moved upward while being aerated in the neutralizing liquid.

In another embodiment of the present invention, an injection nozzle 165 is further provided at an upper portion of the storage space 162 so that the neutralized liquid filled in the lower part of each storage space 162 can be sprayed through the injection nozzle 165 have. Thus, the deodorizing and neutralizing effect can be further improved by spraying the neutralizing liquid again on the upper part of the gas which is neutralized while being aerated at the water surface of the neutralized liquid stored in the lower part of the storage space 162 through the injection nozzle 165. The neutralized liquid injected from the injection nozzle 165 is raised and injected from the lower part of the storage space 162 by the pump, and the injected neutralized liquid is circulated while being stored in the storage space 162 again. Reference numeral 166, which is not described in the drawing, is a neutralizing liquid outlet for discharging the neutralizing liquid to be discharged. Reference numeral 167 denotes a discharge duct 167 through which the gas passed through the deodorizing unit 160 is discharged.

6 is a flowchart showing a method for purifying high-concentration industrial wastewater according to the present invention.

Referring to FIG. 6, the method for purifying high concentration industrial wastewater according to the present invention includes: stirring step of stirring a high concentration wastewater discharged from a factory or the like and a sedimentation purifying agent; Storing the wastewater having undergone the stirring step in the buffer reservoir 110 to perform sedimentation purification; Electrolyzing the wastewater through the sedimentation purification step; Evaporating the wastewater through the electrolysis step; And filtering the wastewater having undergone the evaporation and concentration step through the multi-layered composite filter 170.

At this time, the stirring step may be performed by mixing the wastewater with the high concentration wastewater and the precipitation cleansing agent, and stirring can be performed using the static mixer described above. As the precipitation cleansing agent, there can be exemplified a stripping liquid extracted from food wastes.

In the sediment purification step, the wastewater having been subjected to the stirring step is stored in the buffer storage tank 110 to discharge precipitates in the solid or gel state to the lower part. In the upper part of the inlet through which the wastewater flows into the buffer storage tank 110, The membrane (115) is provided to prevent the solid precipitate contained in the wastewater from being discharged to the discharge port. The filtration membrane 115 is configured such that the inlet side is higher than the inlet side and the opposite side of the inlet side is lower, so that the wastewater flowing into the buffer reservoir 110 can pass through the filtration membrane 115 in a stepwise manner. The step of purifying the precipitate further includes a filter pressing step to return the liquid wastewater to the step of reprecipitating the wastewater after pressurizing the discharged precipitate in the precipitation purification step to extract the liquid wastewater.

In the evaporating and concentrating step, the wastewater flowing into the evaporator 150 is heated and evaporated under a negative pressure, and the evaporated gas is liquefied through the condensing step and then filtered through the multi-layered composite filter 170. The deodorization step may include a deodorizing step of deodorizing and neutralizing the gas discharged without being condensed in the evaporating and concentrating step by aerating the discharged gas into the neutralizing liquid, And neutralizing the gas discharged in the evaporation and concentration step while passing the neutralized liquid through the neutralization liquid.

As described above, the concrete embodiment of the high concentration industrial wastewater purification method according to the present invention has been described above, so that a duplicate description will be omitted.

Although the present invention has been described in connection with certain exemplary embodiments, it is to be understood that the invention is not limited to the disclosed exemplary embodiments. Therefore, the scope of the present invention should not be limited by the described embodiments, but should be defined by the appended claims and equivalents thereof.

100: stirring device
103: Wastewater storage tank
105: Cleaning agent storage tank
110: buffer reservoir
111: Hopper structure
112: sediment discharge pipe
113: Valve
115: Filters
117: inlet
119: discharge pipe
120: Filter press
125: Concentrate storage tank
130: Electrolytic device
150: Evaporation concentrator
155: high concentration evaporator
160:
161:
162: Storage space
163: Vertical partition
164: Neutralizing liquid exposure pipe
165: injection nozzle
166: Neutralizing liquid outlet
167: exhaust duct
170: Multilayer composite filter
190: Purified water storage tank

Claims (20)

An agitating device having a wastewater storage tank and a sedimentation purifying agent storage tank for mixing a high concentration wastewater supplied from the wastewater storage tank with a sedimentation purifying agent supplied from the purifying agent storage tank;
A buffer reservoir for removing the sediment precipitated by the sedimentation-purifying agent in the high-concentration wastewater passed through the agitation device;
An electrolytic device for electrolyzing the wastewater filtered by the precipitate through the buffer reservoir;
An evaporation concentrator for concentrating the polluted water passing through the electrolytic apparatus by evaporation;
A multi-layered composite filter for filtering polluted water through the evaporator;
Wherein the high concentration industrial wastewater purification apparatus comprises:
The method according to claim 1,
Wherein the agitating device comprises a static mixer (Static Mixer).
The method of claim 2,
And a filter membrane is provided in the upper part of the inlet of the contaminated water supplied from the static mixer inside the fraud buffer reservoir.
The method of claim 3,
Wherein the filtration membrane is inclined such that the direction of the contaminated water inlet is high and the direction opposite to the contaminated water inlet is low.
The method according to claim 3 or 4,
Wherein the sediment discharged to the lower portion of the buffer reservoir is separated into liquid wastewater and solid sludge through a filter press so that the wastewater is returned to the buffer reservoir and the sludge is discharged.
The method according to claim 1,
And a high-concentration evaporator is additionally provided between the evaporation concentrator and the multi-layered composite filter to evaporate and concentrate the residual concentrate remaining after evaporation in the evaporation concentrator.
The method of claim 6,
Wherein the evaporation thickener or the high concentration evaporator is heated and evaporated under a negative pressure state.
The method according to claim 1,
The evaporation concentrator further includes a deodorization unit to neutralize gas generated from the evaporation concentrator,
Wherein the deodorizing unit comprises a container body having a hollow interior and a plurality of vertical chambers dividing the inside of the container body into a plurality of storage spaces, wherein the neutralizing liquid is stored in the plurality of storage spaces, Wherein the neutralization liquid is neutralized while contacting the neutralization liquid stored in the storage space.
The method of claim 6,
The high-concentration evaporator further includes a deodorizing unit to neutralize the gas generated from the high-concentration evaporator,
Wherein the deodorizing unit comprises a container body having a hollow interior and a plurality of vertical compartments dividing the inside of the container into a plurality of storage spaces, wherein the neutralizing liquid is stored in the plurality of storage spaces, And is neutralized while being in contact with the neutralized liquid stored in the storage space.
The method according to claim 8 or 9,
The deodorizing unit may include a pipe extending from the outside so as to extend to the lower portion of the first storage space of the container main body so that the discharge port is provided at a position adjacent to the water surface of the neutralizing liquid stored in the lower portion of the storage space, Wherein the piping communicated with the upper portion of the storage space extends to a lower portion of the storage space and the discharge port is provided at a position adjacent to the water surface of the neutralized liquid stored in each storage space.
The method of claim 10,
And the neutralization liquid is sprayed into each of the storage spaces by spraying nozzles at the upper portions of the storage spaces.
A stirring step of stirring the high concentration wastewater and the sedimentation purifying agent;
Storing the wastewater having undergone the stirring step in a buffer reservoir to perform sedimentation purification;
Electrolyzing the wastewater through the sedimentation purification step;
Evaporating the wastewater through the electrolysis step;
Filtering the wastewater through the multi-layered composite filter;
And a high concentration industrial wastewater purification method.
The method of claim 12,
Wherein the stirring step stirs the high concentration wastewater and the desorption liquid extracted from the food wastes using a static mixer.
14. The method of claim 13,
The sedimentation purification step may include a step of storing the wastewater that has been subjected to the stirring step in a buffer reservoir to discharge the sediment to the lower part, and a filter membrane is provided in an upper part of the inlet port into which the wastewater flows into the buffer reservoir, A method for purifying high-concentration industrial wastewater which prevents the sediment of solid phase from being discharged to the outlet.
15. The method of claim 14,
Wherein the filtration membrane is configured such that the inlet port is higher than the inlet port and the opposite side of the inlet port is lower, so that the wastewater flowing into the buffer reservoir is passed through the filtration membrane step by step.
16. The method of claim 15,
Wherein the evaporating and concentrating step includes heating the wastewater flowing into the evaporation concentrator under a negative pressure to evaporate the wastewater.
16. The method of claim 15,
Wherein the concentrating and evaporating step further comprises a concentrated evaporating step of evaporating the remaining concentrate by evaporating and evaporating the remaining concentrate once again under a negative pressure state in the evaporation concentrating step.
15. The method of claim 14,
Wherein the step of purifying the precipitate further comprises a filter pressing step to return the liquid wastewater to the step of reprecipitating the liquid wastewater after the liquid wastewater is extracted by pressurizing the precipitate discharged in the precipitation purification step.
16. The method of claim 15,
Wherein the step of evaporating and condensing further comprises a deodorization step of neutralizing and neutralizing the gas discharged without being neglected in the evaporating and concentrating step to the neutralizing liquid.
The method of claim 19,
Wherein the deodorizing step includes a neutralizing liquid composed of strong alkaline water or hypochlorous acid water in a plurality of storage spaces to cause the gas discharged in the evaporating and concentrating step to be neutralized through the neutralizing liquid.

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