KR101792340B1 - Method and device for cyclic utilizing processing of designated waste - Google Patents

Method and device for cyclic utilizing processing of designated waste Download PDF

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KR101792340B1
KR101792340B1 KR1020150135743A KR20150135743A KR101792340B1 KR 101792340 B1 KR101792340 B1 KR 101792340B1 KR 1020150135743 A KR1020150135743 A KR 1020150135743A KR 20150135743 A KR20150135743 A KR 20150135743A KR 101792340 B1 KR101792340 B1 KR 101792340B1
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waste
reaction
tank
wastewater
water
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KR1020150135743A
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Korean (ko)
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KR20170036499A (en
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김종택
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김종택
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    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F9/00—Multistage treatment of water, waste water or sewage
    • B01F7/16—
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F1/00—Treatment of water, waste water, or sewage
    • C02F1/52—Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities
    • C02F1/5227—Processes for facilitating the dissolution of solid flocculants in water
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F1/00—Treatment of water, waste water, or sewage
    • C02F1/66—Treatment of water, waste water, or sewage by neutralisation; pH adjustment
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F11/00—Treatment of sludge; Devices therefor
    • C02F11/12—Treatment of sludge; Devices therefor by de-watering, drying or thickening
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F11/00—Treatment of sludge; Devices therefor
    • C02F11/12—Treatment of sludge; Devices therefor by de-watering, drying or thickening
    • C02F11/14—Treatment of sludge; Devices therefor by de-watering, drying or thickening with addition of chemical agents
    • B01F2215/0052—

Abstract

In the present invention, designated wastes generated in an industrial site are separately collected and separated into cakes and treated water through a single treatment device, and treated water is recycled as influent water for treating designated wastes And to a method and a device for processing waste.
A designated waste storage tank 10 divided into a waste acid storage tank 11 for storing waste acid and a waste alkali storage tank 12 for storing waste alkali;
The slaked lime processing facility (70) for generating and storing the slaked lime is provided. When the waste acid flows into the waste acid storage tank (11), the influent water is introduced through a separate inlet pipe (H1) S, respectively, or a separate reaction material storage box 75 for storing aluminum sulfate. When the waste alkaline is introduced into the waste alkali storage tank 12, aluminum sulfate is introduced into the inside of the waste alkali storage tank 12, The waste alkalinity charged into the agitator S provided in the agitator S is mixed with aluminum sulfate so that the waste wastewater is regenerated by regulating the concentration of the designated waste to pH 7 by reacting any one of waste acid and waste alkaline waste A reaction tank 20;
A plurality of flocculant reservoirs 80 are provided on the upper portion of the flocculant reservoir 80. The mixed waste water and the polymer flocculant held in the flocculant reservoir 80 are mixed and stirred in the reaction tank 20, An agglomeration tank (30) configured to generate agglomerated wastewater containing the sludge by stirring and stirring the fine suspended matters contained in the reaction wastewater with the agitator (S);
A sedimentation tank (41) configured to allow sedimentation of the sludge to the lower end portion by flowing into the separation hood (41) formed at the upper end of the central portion of the flocculation wastewater containing the sludge generated in the flocculation tank (30) (40);
A treatment water tank (50) for collecting clean treated water held at the upper end of the settling tank (40) and recovering the treated water to the slaked lime storage or reaction tank to use as inflow water;
A dehydrator 60 for collecting the sludge held at the lower end of the settling tank 40 and separating the sludge into a solid cake and a drain of liquid through a dewatering operation,
A circulation utilization processing device for the designated waste constituted respectively by the entrusted storage tank 61 for entraining and storing waste water separated by the dehydrator 60 and for entrusting the waste water according to the water quality of the waste water or for recovering the waste water to the treatment water tank 50 through;
A predetermined amount of waste acid stored in the waste acid storage tank 11 is sent to the reaction tank 20 by the pump P and the slaked liquor generated in the slag processing facility 70 is introduced into the reaction tank 20, And a pump (P) is connected to the reaction tank (20) by a predetermined amount of waste alkali stored in the waste alkaline storage tank (12) (S1b) in which aluminum sulfate is introduced into the reaction tank 20 to stir the waste alkaline and aluminum sulfate with the stirrer S to generate the reaction waste alkaline, A specific waste reaction step (S1) of producing a waste wastewater containing either one of a reacted waste acid and a reacted waste alkaline to maintain the ion concentration of the designated waste separated into alkaline water or wastewater flowing into the reaction tank (20) at pH 7;
A wasted acid flocculation step (S2a) of mixing an anionic flocculant into the reaction waste acid produced through the above-mentioned waste acid reaction step (S1a) and then stirring to produce an aggregated waste acid; and a step (S1b) in which the cationic coagulant is mixed and stirred to generate coherent pulmonary alkali, thereby promoting the binding and coagulation of fine suspended matters contained in the reaction wastewater to each other to cause aggregation of the sludge A reaction wastewater agglomeration step S2 for generating wastewater;
The coagulated wastewater containing the sludge generated in the reaction wastewater agglomeration step S2 is gradually introduced into the settling tank 40 so that the sludge in the inflowed coagulated wastewater gradually precipitates to the lower end of the settling tank 40, A flocculation and sedimentation step (S3) of producing coagulated wastewater which is naturally separated;
The treated water separated at the upper end of the settling tank 40 by being separated through the coagulated wastewater settling step S3 is naturally discharged through the discharge path formed at the upper end of the settling tank 40 and flows into the treated water tank 50, A sedimentation wastewater separation step (S4) for introducing and discharging sludge into the dehydrator (60) through a pump (P);
The sludge introduced into the dehydrator 60 through the settling wastewater separation step S4 is dewatered into a solid state cake and a liquid state drain water so that the cake is immediately transferred to the consignment treatment vehicle 62 for consignment treatment, A sludge dewatering step (S5) for storing in a separate dwelling storage tank (61);
The treated water flowing into the treated water tank 50 through the settling wastewater separation step S4 is collected into the slaked lime processing facility 70 and the reaction tank 20 by using the pump P to react the waste acid, 75) to be used as influent water in the designated waste reaction step (S1) for reacting with the waste alkali, or to be used as influent water in the reaction wastewater flocculation step (S2) for collecting the reaction wastewater in the coagulant storage tank (80) And the step (S6) of recovering the treated water is sequentially and repeatedly carried out by the designated waste treatment device.

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method and apparatus for recycling a designated waste,

The present invention relates to a circulation utilization treatment method and apparatus for a specific waste, and more particularly, to a waste disposal system for collecting designated waste classified as waste alkaline and waste acid generated in an industrial site separately, The present invention relates to a circulation utilization processing method and apparatus for a designated waste which is separated into water and treated, and which can be recycled as influent water for treating designated waste.

Wastes are hazardous substances that can pollute the surrounding environment such as waste oil, waste acid, and waste alkali among industrial wastes generated in the industrial site. This is waste treatment, transportation, , So that the first exporter of wastes can identify the final disposal agent and prove the treatment route through the designated waste disposal certificate system managed by the Ministry of Environment, Of the total wastes.

Specified wastes are mainly composed of waste acids and waste alkalis in the steelmaking and smelting, chemical fiber industry, dye factory, metal surface treatment and semiconductor manufacturing process. Especially, Waste acid, which is a strong acidic water, causes severe problems to the surrounding agricultural and marine products, and weakens the structure by oxidizing bridges and other facilities. The alkaline water, which is a strong alkaline water having a pH of 12 or more, Waste liquid washing, drum washing waste liquid, dyeing and sorting, and waste water of the leather manufacturing industry, as well as causing pollution of the sewage in the city center and generating odor.

In other words, in glass-related sites such as semiconductors, substances which are harmful to human bodies such as hydrofluoric acid, sulfuric acid and the like are used to corrode or polish glass as necessary or for other special purposes, In this case, it is obvious that serious environmental problems will arise if the waste acid generated by this is released as it is. On the other hand, even if the treated water containing the remaining harmful ions are discharged after the treatment, the waste acid accumulates in the soil continuously to increase the contamination of the water resources and eventually harm the human body. It also violates the saving of water.

In the past, in the conventional waste acid treatment method, alkali neutralizing agents such as caustic soda and sodium carbonate such as sodium carbonate and the like are used as the neutralizing agent, (Ca (OH) 2) is most commonly used as a neutralizing agent for neutralizing such a spent acid, and is used as a neutralizing agent such as calcium hydroxide Of the harmful substances such as fluorine and other heavy metals are lowered to below the legal limit, and the treated water is disposed of.

In the neutralization treatment method of the conventional waste alkaline solution, the waste alkali is collected, and then the surfactant and the fogging material, which are neutralizing agents, are added thereto to efficiently remove the suspended substances generated in the neutralization treatment of the alkali solution and the fogging material .

However, the designated wastes treated by each method, as in the case of the above, even if the residual harmful ion concentration of the treated water is maintained at pH 7, if it continues to be released, it accumulates in the soil causing soil pollution, There is a problem in that even when the treated water is recycled to other fields, transportation is difficult and ultimately it has to be discharged as well.

In recent years, as can be seen from the above-mentioned " method and system for treating waste acid free water ", for example, a method of adjusting pH of waste water by mixing waste acid with slaked lime and stirring the wastewater to precipitate sludge And a step of re-precipitating and removing the coagulated precipitate after adding the coagulant to the filtrate, and a step of reusing the non-precipitated suspended material after filtration and reusing it as water. Thus, compared with the conventional wastewater treatment system, It is possible to reduce the concentration of harmful ions constituting the wastewater as much as possible and to contribute to the safety problem in reuse. In addition to the treatment of precipitated sludge as a by-product of neutralization reaction, Because it is not done, measures of industrial water saving can respond Since no discharge is performed except for the treatment of sludge precipitated as a by-product of the neutralization reaction in the wastewater treatment process through the waste disposal method and its system, it is possible to contribute to environmental preservation In addition to being able to cope with the measure of saving industrial water as well as being able to use only a relatively simple physical device, it is easy to use and it also contributes to the safety problem at the time of reuse by minimizing the concentration of harmful ion, And the effect can be.

However, the above-described prior art technology allows each designated waste to be processed by each method through each apparatus, thereby not only increasing the cost and time for constructing and maintaining each processing apparatus for processing individual designated waste, When the designated waste of the component is treated, the amount of the sludge or the treated water to be entrusted is increased because the amount of the designated waste is accumulated in the treatment device and the treatment efficiency is gradually lowered, However, even though there are fundamental problems such as exceeding the capacity to be recycled, the designated waste disposal company that handles designated waste is not able to provide a solution to this problem.

KR Patent No. 10-0109132 KR Patent No. 10-1272875

Accordingly, the present invention has been made in order to solve all of the above problems, and it is an object of the present invention to provide a waste disposal system for disposing waste wastes and waste wastes composed of waste alkalis alternately only in a set of treatment apparatuses comprising a reaction tank, Of the designated wastes can be treated with a set of treatment equipment, thereby drastically reducing the installation and maintenance cost of the treatment equipment, and at the same time, recycling the treated water generated in the water treatment process as influent water that can proceed the reaction step and the coagulation step And to provide a method and apparatus for recycling utilization of designated wastes that prevent the waste water from being leaked to the outside.

In addition, by alternately treating the waste acid and the waste alkali which maintain different ion concentrations, it is easy to set the ion concentration of the treated water as well as to facilitate the washing of the treatment apparatus and to keep the treatment apparatus and the surrounding environment clean To be able to.

The waste recycling utilization treatment method and apparatus of the present invention, which is presented as a means for solving the above problem, comprises a waste acid storage tank (11) for storing waste acid and a waste alkali storage tank (12) for storing waste alkali A designated waste storage tank (10);

The slaked lime processing facility (70) for generating and storing the slaked lime is provided. When the waste acid flows into the waste acid storage tank (11), the influent water is introduced through a separate inlet pipe (H1) S, respectively, or a separate reaction material storage box 75 for storing aluminum sulfate. When the waste alkaline is introduced into the waste alkali storage tank 12, aluminum sulfate is introduced into the inside of the waste alkali storage tank 12, The waste alkalinity charged into the agitator S provided in the agitator S is mixed with aluminum sulfate so that the waste wastewater is regenerated by regulating the concentration of the designated waste to pH 7 by reacting any one of waste acid and waste alkaline waste A reaction tank 20;

A plurality of flocculant reservoirs 80 are provided on the upper portion of the flocculant reservoir 80. The mixed waste water and the polymer flocculant held in the flocculant reservoir 80 are mixed and stirred in the reaction tank 20, An agglomeration tank (30) configured to generate agglomerated wastewater containing the sludge by stirring and stirring the fine suspended matters contained in the reaction wastewater with the agitator (S);

A sedimentation tank (41) configured to allow sedimentation of the sludge to the lower end portion by flowing into the separation hood (41) formed at the upper end of the central portion of the flocculation wastewater containing the sludge generated in the flocculation tank (30) (40);

A treatment water tank 50 for collecting clean treated water to be held at the upper end of the settling tank 40 and then using it as necessary inflow water, such as collecting it in a slaked lime storage or a reaction tank;

A dehydrator 60 for collecting the sludge held at the lower end of the settling tank 40 and separating the sludge into a solid cake and a drain of liquid through a dewatering operation,

A circulation utilization processing device for the designated waste constituted respectively by the entrusted storage tank 61 for entraining and storing waste water separated by the dehydrator 60 and for entrusting the waste water according to the water quality of the waste water or for recovering the waste water to the treatment water tank 50 through;

A predetermined amount of waste acid stored in the waste acid storage tank 11 is sent to the reaction tank 20 by the pump P and the slaked liquor generated in the slag processing facility 70 is introduced into the reaction tank 20, And a pump (P) is connected to the reaction tank (20) by a predetermined amount of waste alkali stored in the waste alkaline storage tank (12) (S1b) in which aluminum sulfate is introduced into the reaction tank 20 to stir the waste alkaline and aluminum sulfate with the stirrer S to generate the reaction waste alkaline, A specific waste reaction step (S1) of producing a waste wastewater containing either one of a reacted waste acid and a reacted waste alkaline to maintain the ion concentration of the designated waste separated into alkaline water or wastewater flowing into the reaction tank (20) at pH 7;

A wasted acid flocculation step S2a in which an anion-coagulant (Anion-Polymer) is mixed with the reacted waste acid produced through the above-mentioned waste acid reaction step (S1a) and then agitated to produce coagulated waste acid; and the above spent alkaline reaction step (S1b) (1b) in which a cationic coagulant (Cation-Polymer) is added to the generated reaction waste alkali and then stirred to generate coagulated lung alkali, thereby selectively removing fine suspended matters contained in the reaction wastewater And (S2) a reaction wastewater agglomeration step of accelerating the agglomeration and coagulation of the sludge to produce aggregated wastewater contained in the sludge;

The coagulated wastewater containing the sludge generated in the reaction wastewater agglomeration step S2 is gradually introduced into the settling tank 40 so that the sludge in the inflowed coagulated wastewater gradually precipitates to the lower end of the settling tank 40, A flocculation and sedimentation step (S3) of producing coagulated wastewater which is naturally separated;

The treated water separated at the upper end of the settling tank 40 by being separated through the coagulated wastewater settling step S3 is naturally discharged through the discharge path formed at the upper end of the settling tank 40 and flows into the treated water tank 50, A sedimentation wastewater separation step (S4) for introducing and discharging sludge into the dehydrator (60) through a pump (P);

The sludge introduced into the dehydrator 60 through the settling wastewater separation step S4 is dewatered into a solid state cake and a liquid state drain water so that the cake is immediately transferred to the consignment treatment vehicle 62 for consignment treatment, A sludge dewatering step (S5) for storing in a separate dwelling storage tank (61);

The treated water flowing into the treated water tank 50 through the settling wastewater separation step S4 is collected into the slaked lime processing facility 70 and the reaction tank 20 by using the pump P to react the waste acid, 75) and used as influent water in the designated waste reaction step (S1) for reacting with the waste alkali, or recovered to the flocculent reservoir (80) to be used as influent water in the reaction wastewater flocculation step (S2) And the step (S6) of recovering the treated water is sequentially and repeatedly carried out by the designated waste treatment device.

Industrial Applicability As described above, the present invention is configured to treat a plurality of designated wastes composed of waste acid and waste alkaline with only one set of processing apparatuses, thereby minimizing the installation area and associated apparatuses of the processing apparatus, Water can be recycled as influent water and used repeatedly to circulate the water, thereby preventing the treated water from leaking to the outside, thereby preventing water pollution occurring after the water treatment.

In particular, it will not only ensure the economic benefits of the designated waste companies by significantly reducing the management costs such as cleaning and maintenance of the treatment equipment, but also prevent the spread of odor and harmful substances in the designated waste treatment companies, It is a very effective invention that provides various advantages such as ensuring health and safety and preventing environmental pollution around the environment.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a block diagram showing a process of a circulation utilization processing method for a designated waste according to a preferred embodiment of the present invention. FIG.
BACKGROUND OF THE INVENTION 1. Field of the Invention [0001] The present invention relates to an apparatus for circulating utilization of a specific waste and a processing method therefor.
3 is a schematic structural view showing an apparatus for circulating utilization waste acid and a method for treating waste acid according to a preferred embodiment of the present invention.
4 is an overall structural view showing an apparatus for circulating utilization of waste alkaline and a method for treating the waste alkaline in accordance with a preferred embodiment of the present invention.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Preferred embodiments of the present invention will now be described in detail with reference to the accompanying drawings.

A designated waste storage tank (10) divided into a waste acid storage tank (11) for storing waste acid and a waste alkali storage tank (12) for storing waste alkali;

A separate slurry processing facility 70 for generating and storing slaked lime is provided. When the waste acid flows into the waste acid storage tank 11, the slaked lime is introduced, and the waste acid charged into the stirrer S provided therein is mixed with the slaked lime , Or a separate reactant storage container 75 for storing aluminum sulfate. When the spent alkalis flows into the spent alkaline storage tank 12, aluminum sulfate is added to the waste alkaline storage tank 12, and then the spent alkalis And a reaction tank (20) configured to react with a designated waste of waste acid and waste alkaline to produce a reaction wastewater which maintains the concentration of designated waste at pH 7 and maintains it;

A plurality of flocculant reservoirs 80 are provided on the upper portion of the flocculant reservoir 80. The mixed waste water and the polymer flocculant held in the flocculant reservoir 80 are mixed and stirred in the reaction tank 20, An agglomeration tank (30) configured to generate agglomerated wastewater containing the sludge by stirring and stirring the fine suspended matters contained in the reaction wastewater with the agitator (S);

A sedimentation tank (41) configured to allow sedimentation of the sludge to the lower end portion by flowing into the separation hood (41) formed at the upper end of the central portion of the flocculation wastewater containing the sludge generated in the flocculation tank (30) (40);

A treatment water tank 50 for collecting clean treated water to be held at the upper end of the settling tank 40 and then using it as necessary inflow water, such as collecting it in a slaked lime storage or a reaction tank;

A dehydrator 60 for collecting the sludge held at the lower end of the settling tank 40 and separating the sludge into a solid cake and a drain of liquid through a dewatering operation,

The waste water separated by the dehydrator (60) is introduced and stored, and the waste water is discharged to the treatment water tank (50) according to the quality of the discharged water. (See Fig. 2).

The designated waste storage tank 10 is divided into a waste acid storage tank 11 for storing the spent acid and a waste alkaline storage tank 12 for storing spent alkali, It is a facility to store a certain amount of water. Normally, the area is maintained according to the disposal capacity of the designated waste while a cover is formed on the upper part so as to be hermetically closed in the usual way. It is preferable that the designated waste introduced into the structure is configured to be able to be discharged to the outside through a separate pump (P) in a structure for structurally preventing the other contaminants from entering the storage facility will be.

A reaction tank 20 equipped with an agitator S for neutralizing a designated waste concentration to a pH of 7 by reacting with a designated waste of waste acid and waste alkaline is disposed in the waste acid storage tank 11, The slaked liquor is mixed with the slaked liquor treated through the slagging pipe 72 and then stirred or mixed with the alkaline alkali and aluminum sulfate stored in the waste alkali storage tank 12 and then stirred. , It can be understood that the designated waste is a container for maintaining the ion concentration in reaction with the reaction material at pH 7.

That is, when the designated waste flowing into the reaction tank 20 is waste acid, the calcium hydroxide produced in the calcium hydroxide treatment tank 71, which produces powdered calcium hydroxide with a water content of 80% or more by flowing the powdered calcium oxide and the influent water together, The slaked lime processing facility 70 constitutes the slaked lime processing facility 70 for securing the slaked lime containing the even moisture and the slaked liquor generated through the slaked lime processing facility 70 is introduced into the reaction vessel 20, In addition to the constitution that the inflow amount of the slaked lime can be influenced according to the acidity and the ion concentration and the content of the waste acid, the reaction waste acid generated by mixing the wasted acid and the slaked lime with stirring is absorbed by the slaked lime, And an additional inflow water pipe (H1) is provided to increase the concentration of water in the reaction waste acid so that the inflow water can be easily introduced into the reaction waste water, (Al2 (SO4) 3) contained in the reaction material storage box 75 is introduced into the reaction tank 20 when the designated waste flowing into the reaction tank 20 is waste alkaline, Is a container capable of separately inflowing two types of designated wastes separated into waste acid and waste alkali into one reaction tank (20) so as to be able to flow in accordance with the ion concentration and the inflow amount of alkali.

In addition, any one of the waste wastewater generated by stirring in the reaction tank 20 and the waste alkaline wastewater and the polymer flocculant are mixed and then stirred to promote the binding and coagulation of fine floats contained in the designated waste, Since the polymer flocculant supplied to the flocculent reservoir 80 differs depending on the type of the flocculated wastewater flowing into the flocculant tank 30, the plurality of flocculant reservoirs 80 are installed on the upper part of one flocculant tank 30 Anion-Polymer is supplied to one flocculent reservoir 80 and cation flocculant (Cation-Polymer) is supplied to another flocculent reservoir 80. The flocculant is supplied to the flocculent reservoir 80, It may be preferable to configure it to be mixed with the flocculated wastewater.

The sedimentation tank 40, which stores the flocculated wastewater containing the sludge generated in the flocculation tank 30 and gradually separates the flocculated wastewater into sludge and treated water by gradually precipitating the sludge to the lower end, And a separating hood 41 having a lower end at the upper end of the central portion so as to precipitate the coagulated sludge contained in the flocculated wastewater flowing into the interior of the cone, The sludge is discharged to the lower end of the lower end of the sedimentation tank 40 through the pump P because the coagulated wastewater flowing through the separation hood 41 flows into the upper part of the sedimentation tank 40, It is preferable that a separate treated water discharging device constituting the piping H and capable of naturally discharging the process water held at the upper portion by gravity is constituted Since this is a well-known configuration of the conventional clarifier 40 it is further detailed configuration thereof will be omitted.

In addition, the treatment water tank 50, which collects clear water to be treated at the upper end of the sedimentation tank 40 and collects it in the slaked lime storage or the reaction tank, And is connected to the inflow water pipe H1 through which the inflow water flows through the pipe H so that the process water can be used as inflow water and the inflow of external impurities It is preferable to construct a lid which is easy to open and close in order to prevent it.

The sludge retained in the lower end of the settling tank 40 is collected and separated into a solid cake and a drain of liquid through a dewatering operation. A dehydrator 60, which entrusts the solid cake to the liquid phase drainage water, ) Of waste acid sludge and waste alkaline sludge precipitated at the lower end of the sludge is discharged to a dehydration capacity or less and separated into a dehydrated water and a cake having a water content of less than 70% A product sold on the market that divides by how much sludge is introduced and dewatered at a time is divided into capacities, and a detailed description thereof will be omitted in the present invention.

Lastly, the discharge reservoir 61, which stores effluent separated by the dehydrator 60 and which is entrusted according to the quality of the effluent water or is recovered to the treatment tank 50, A storage space for allowing the treated water to flow into the treated water tank 50 when the treated water is insufficient in the treated water tank 50 and to be used as treated water, It is preferable to prevent the odor generated in the effluent water from being diffused to the outside as well as to prevent the inflow of other contaminants from the outside.

Although the slaked lime storage tank 72, the reaction tank 20, the flocculation tank 30, and the settling tank 40, which are individually constituted, are each composed of a single structure, It is also possible to increase the processing efficiency by repeating the processing steps.

In order to allow the contents to flow into the designated waste storage tank 10 and the reaction tank 20, the flocculation tank 30, the settling tank 40, the treated water tank 50, and the consignment storage tank 61, (P) for controlling the flow rate due to a failure or an excessive inflow during the use of the treatment apparatus, and is connected to each piping (H) used for supply and drainage, It is preferable that the valve V is used at a required position of each pipe H and the designated waste storage tank 10 and the reaction tank 20, the flocculation tank 30, the treatment tank 50, The fryer reservoir 61 is provided with a stirrer S so that the contents introduced into the fryer reservoir 61 can be agitated, which is a known matter and will not be described in detail.

The circulation utilization processing method of the designated waste for treating the waste designated as waste acid to be treated and waste designated as waste alkaline to be treated by using the circulating utilization treatment apparatus constituted as described above, A predetermined amount of waste acid stored in the slurry processing apparatus 70 is introduced into the reaction tank 20 by the pump P and the slaked liquor generated in the slaked lime processing facility 70 is introduced into the reaction tank 20 to stir the waste acid and the slaked lime with the stirrer S A waste acid reaction step (S1a) for producing a reaction waste acid; and a step of introducing a predetermined amount of waste alkali stored in the waste alkali storage tank (12), which is entrusted from the outside, into the reaction tank (20) (S1b) which flows into the reaction tank 20 and stirs the waste alkaline and aluminum sulfate with the stirrer S to produce the reaction waste alkaline, A specific waste reaction step (S1) of producing a waste wastewater containing either reacted waste acid or reactive waste alkali to maintain the ion concentration of the designated waste classified by alkaline number at pH 7;

A wasted acid flocculation step S2a in which an anion-coagulant (Anion-Polymer) is mixed with the reacted waste acid produced through the above-mentioned waste acid reaction step (S1a) and then agitated to produce coagulated waste acid; and the above spent alkaline reaction step (S1b) (1b) in which a cationic coagulant (Cation-Polymer) is added to the generated reaction waste alkali and then stirred to generate coagulated lung alkali, thereby selectively removing fine suspended matters contained in the reaction wastewater And (S2) a reaction wastewater agglomeration step of accelerating the agglomeration and coagulation of the sludge to produce aggregated wastewater contained in the sludge;

The coagulated wastewater containing the sludge generated in the reaction wastewater agglomeration step S2 is gradually introduced into the settling tank 40 so that the sludge in the inflowed coagulated wastewater gradually precipitates to the lower end of the settling tank 40, A flocculation and sedimentation step (S3) of producing coagulated wastewater which is naturally separated;

The treated water separated at the upper end of the settling tank 40 by being separated through the coagulated wastewater settling step S3 is naturally discharged through the discharge path formed at the upper end of the settling tank 40 and flows into the treated water tank 50, A sedimentation wastewater separation step (S4) for introducing and discharging sludge into the dehydrator (60) through a pump (P);

The sludge introduced into the dehydrator 60 through the settling wastewater separation step S4 is dewatered into a solid state cake and a liquid state drain water so that the cake is immediately transferred to the consignment treatment vehicle 62 for consignment treatment, A sludge dewatering step (S5) for storing in a separate dwelling storage tank (61);

The treated water flowing into the treated water tank 50 through the settling wastewater separation step S4 is collected into the slaked lime processing facility 70 and the reaction tank 20 by using the pump P to react the waste acid, 75) to be used as influent water in the designated waste reaction step (S1) for reacting with the waste alkali, or to be used as influent water in the reaction wastewater flocculation step (S2) for collecting the reaction wastewater in the coagulant storage tank (80) And the step S6 of recovering the treated water is sequentially and repeatedly carried out by the designated waste disposal apparatus (refer to FIG. 1).

As described above, the circulation utilization treatment method of the designated waste is a device which is to treat separately the waste acid and the waste alkali separately without separately treating the waste acid and the waste alkali. First, as shown in FIG. 2, Is treated in one treatment device, but the treatment method is different treatment agent and coagulant depending on the amounts of waste acid and waste alkaline which are opposite to each other, so that the amount of the supplied waste can be adjusted according to the ion concentration of the incoming waste A designated wastewater reaction step S1 for dividing the different reaction treatment agents flowing into the reaction tank 20 into a waste acid reaction step S1a and a waste alkaline reaction step S1b, The amount of reactive wastewater that is divided into reacted waste acid and reactive alkaline reacts to adjust the amount of input, The sludge is separated into a sludge separated in the sedimentation wastewater separation step S4 as well as a reaction wastewater agglomeration step S2 in which the agglomeration step is divided into a waste acid flocculation step S2a and a waste alkaline flocculation step S2b, The present invention is not limited to the scope of the present invention, and the scope of the present invention is not to be construed as limiting the scope of the present invention. .

Example 1)

3, 50 liters of waste acid having a pH of 2 stored in the waste acid storage tank 11 is introduced into the reaction tank 20 by the pump P, and at the same time, 8 liters of quicklime 40 liters of the slaked liquor produced by mixing 32 liters of the liquefied water into the reaction tank 20 was mixed and mixed with 90 liters of the calcium hydroxide mixed acidic water with a stirrer S at a low speed of 40 rpm for stirring and reacting, In the process of proceeding for 5 hours, 400 L of influent water is gradually introduced into the reaction tank 20 through a separate inflow pipe H 1, and 490 L of reactive waste acid A specific waste reaction step (S1) for generating a specific waste;

490 L of reaction waste acid held in the reaction tank 20 generated through the designated waste reaction step S1 is introduced into the flocculation tank 30 by the pump P and then diluted with anion coagulant (anion-polymer) 10 liters of polymer flocculant was introduced and then the stirrer (S) was rotated at 40 rpm for 5 hours to uniformly mix and flocculate fine suspended matters dispersed in the reaction waste acid to produce 500 L of coagulated spent acid containing sludge A wastewater flocculation step S2;

500 liters of coagulated spent acid containing the sludge generated in the reaction wastewater agglomeration step S2 are slowly introduced into the settling tank 40 for 5 hours by the pump P and the settled sludge contained in the coagulated spent acid is gradually precipitated (S3) for holding the treated water on the upper part of the sedimentation tank (40) so as to be separated into 200 liters of sludge settled in the lower part of the settling tank (40) and 200 liters of treated water held in the upper part thereof;

200 liters of the treated water separated and separated from the sedimentation tank 40 by the coagulation wastewater sedimentation step S3 are naturally discharged through the discharge path formed at the upper end of the sedimentation tank 40 and introduced into the treatment water tank 50 A sedimentation wastewater separation step (S4) for forcibly introducing 200 liters of sludge deposited at the lower end of the sedimentation tank (40) into the dehydrator (60) through a pump (P);

The sludge is separated into a 50,000 cm3 cake which is dewatered into the dehydrator 60 and a 150-liter liquid drainage water which is maintained in a solid state through the sedimentation wastewater separation step S4, A sludge dewatering step (S5) for storing the effluent water in a separate dwelling reservoir (61);

In the sedimentation wastewater separation step (S4), 200 liters of the treated water introduced into the treated water tank 50 is introduced into the slurry treatment facility 70 by the pump P, and 168 liters of wood pellets are immediately introduced into the reaction tank 20 And the inflow water of 200 liters which is not enough is introduced into the treatment water tank 50 by replenishing 150 liters of the effluent water stored in the consignment reservoir 61 to the treatment water tank 50, 40 liters are introduced into the reaction tank 20 among the new 50 liters of influent water flowing from the outside through the reaction tube H1 and 10 L of influent water for diluting the anion-coagulant (Anion-Polymer) (S6) that allows the wastewater to flow into the coagulation wastewater treatment step (80) and the coagulated wastewater reaction step (S3), respectively, Without discharging the treated water generated in the process is to re-characterized in the way that should be used as inlet water. (See Fig. 3)

The circulation utilization treatment method of the designated waste for treating the waste acid proceeding as described above is such that the residual amount of the treated water always becomes shorter than the required amount of the influent water. Therefore, at this time, the effluent water stored in the consignment storage tank 61 is introduced into the treatment water tank 50, It is possible to replenish the influent water to treat the waste acid as a cake and to use the effluent water and the treated water of the remaining liquid as the influent water to inflow the inflow water from the outside once and then the inflow water necessary for the subsequent designated waste disposal process from the outside Is an advantageous method that only a small amount of water can be flown and the remaining influent water can be circulated and used repeatedly by itself. Therefore, there is an effect of substantially preventing the waste water from being treated and discharged to the outside.

In addition, the waste acid which maintains the ion concentration below the pH 2 is subjected to the reaction, coagulation, and precipitation procedures to produce a solid cake, which is then entrusted to the outside, and the remaining part is converted into treated water having an ionic concentration of pH 7, , It is necessary not only to prevent the treated water in the liquid state from being discharged to the outside but also to recycle a large amount of influent water which is essentially consumed when the waste acid is treated without flowing in from the outside, It can be seen that this method is a very effective way to reduce the influx of inflow water to reduce the cost of influx of influent water.

That is, the slaked lime added to treat the spent acid through the above-described waste acid treatment method is combined with the foreign matter to be removed, which is dispersed in the waste acid, and is converted into the sludge. Therefore, the volume of the cake produced by dewatering the sludge, Therefore, the inflow water flowing from the outside is only the amount of the first inflow, and the rest can be covered by both the treated water and the drain water generated during the waste acid treatment

Example 2)

As shown in FIG. 4, 80 liters of waste alkaline having a pH of 12 stored in the waste alkaline storage tank 12 is charged into the reaction tank 20 by the pump P, 10 liters of an aluminum sulfate solution mixed with aluminum sulfate (Al2 (SO4) 3) mixed with influent water was introduced into a reaction tank 20, and 90 liters of aluminum sulfate mixed waste alkali was stirred at 120 rpm with a stirrer (S) To generate 90 liters of reactive waste alkali which causes microbes to be generated while maintaining the ionic concentration of the waste alkaline introduced into the reaction tank 20 at pH 7, Step Sl;

90 liters of the reacted waste alkali held in the reaction tank 20 generated through the designated waste reaction step S1 is introduced into the flocculation tank 30 by the pump P and then diluted with the cationic flocculant (Anion-Polymer) (S) and rotated at 120 rpm for 5 hours to uniformly mix and disperse the suspended solids in the reacted waste alkaline solution. The sludge contained 100 L of coagulated lung alkali A reaction wastewater agglomeration step S2 of generating;

100 liters of coagulated waste alkali containing the sludge generated in the reaction wastewater agglomeration step S2 are slowly introduced into the settling tank 40 by the pump P for 5 hours while the sludge contained in the coagulated waste alkaline is introduced into the lower end A flocculating step (S 3) of separating and holding the treated water in the upper part of the sedimentation tank (40) and the treated water in the upper part (80 L);

80 liters of treated water separated from the sedimentation tank 40 by the coagulation wastewater sedimentation step S3 are naturally discharged through the discharge path formed at the upper end of the sedimentation tank 40 and introduced into the treatment water tank 50, A sedimentation wastewater separation step (S4) for forcibly introducing 20 liters of sludge deposited and deposited at the lower end of the sedimentation tank (40) into a dehydrator (60) through a pump (P);

The sludge separated into the 5,000 cm3 cake and the 15-liter liquid-state drainage water, which are dewatered to the dehydrator 60 through the sedimentation wastewater separation step S4, A sludge dewatering step (S5) for storing the effluent water in a separate dwelling reservoir (61);

The 80 liters of the treated water flowing into the treated water tank 50 through the settling wastewater separation step S4 may be introduced into the reactive material reservoir 75 by the pump P to carry out the designated waste reaction step S1 And the remaining 60 liters of the treated water should be used as other used water or discharged to the outside, and it is necessary to discharge the treated water to the foster storage tank 61, (Step S6) in which the waste water is recycled to the sewage treatment plant, and the treated water recovery step (S6) for consigning the 15 liters of the waste water stored in the sewage treatment plant (See Fig. 4). [0003]

In the above-mentioned treatment method, waste alkaline water having an ion concentration of at least pH 12 is subjected to reaction, coagulation, and precipitation to produce a solid cake, which is then entrusted to the outside and a part of the treated water is treated , It is possible to recycle a portion of the treated water in the liquid state as influent water for treating the waste alkali without supplying it to the outside.

That is, the ion concentration of the waste alkaline introduced for the above-mentioned treatment is higher than pH 12, and the higher the ion concentration, the higher the amount of aluminum sulfate to be added in proportion to the inflow amount of the waste alkaline introduced to lower the ion concentration, It is necessary to supply new inflow water in proportion to the amount of waste alkali to be treated every time the waste alkaline is repeatedly treated. However, since the amount of waste alkaline is small compared to the throughput, It is a waste alkaline treatment method in which most of the treated water for maintaining the remaining ion concentration at pH 7 is discharged to the outside.

At this time, since the waste alkaline treatment method of Embodiment 2) uses only a part of the waste alkaline treated water as inflow water, the treated water is raised in the treated water tank 50 every time the treated water is repeatedly recycled under the same conditions And it can be understood that the working condition is that the treated water must be taken out to the outside.

As described above, the circulation utilization processing method of the designated waste proceeding separately from the waste acid to be treated through each of the embodiments and the waste alkaline is carried out through the circulation utilization processing device of the designated waste without individually treating the waste acid and the waste alkali As shown in FIG. 2, two types of designated wastes classified as waste acid and waste alkaline are treated in the same treatment apparatus, but the amounts of sludge and treated water are significantly different from each other I can know others.

In other words, since the influent water required to maintain the proper water content of the calcium hydroxide to be introduced to proceed the waste acid reaction step (S1a) in the process of the waste acid is not sufficient as the treated water recovered at the completion of the treatment, The inflow water required to dilute the aluminum sulfate to be introduced for proceeding with the waste alkaline reaction step (S1b) is inferior to the treated water recovered at the completion of the treatment, Therefore, the waste water treatment method and the waste alkali treatment method are sequentially carried out so that the amount of the treated water generated during the treatment process can be easily controlled and the inflow water necessary for treating the designated waste can be utilized for the first time Only from the outside, and in the processing process from the second time, It is desirable that the water intake can cope with the treatment water generated in the treatment process.

As described in the present invention, it is preferable to treat two kinds of waste water alternately instead of treating only the designated waste of either the waste acid or the waste alkaline. In this case, the treated water and the waste water generated when treating the designated waste water, It can be said that it is an effective method for warming out not to be discharged to the outside.

The method and apparatus for circulating utilization of the designated waste of the present invention which operates in the above-described manner is configured to treat a plurality of designated wastes composed of waste acid and waste alkaline by only one set of processing apparatuses, It is possible not only to minimize the apparatus, but also to circulate the treated water generated through the treatment method to the influent water and recycle it to prevent the treated water from leaking to the outside, thereby preventing water pollution occurring after the water treatment, By constructing a low-cost, high-efficiency designated waste disposal system, it is possible not only to guarantee the economic benefits of the designated waste disposal company by drastically reducing the management costs such as cleaning and maintenance of the disposal apparatus, Health and safety by improving work environment Ensuring it can be seen that also with the very effective invention to provide a variety of benefits, such as to prevent contamination of the surrounding environment.

Therefore, it is possible to reduce the consumption of various consumables required in the treatment process while simultaneously treating the waste acid and the waste alkali which cause severe environmental pollution, and the treatment device and the treatment method which can increase the water treatment effect, It can be seen that the invention has a wide range of advantages, which must be actively applied to the water treatment apparatus in the dimension.

10: Designated waste storage tank 11: Waste water storage tank
12: Waste alkaline storage tank 20: Reactor
30: coagulation tank 40: settling tank
50: Treatment tank 60: Dehydrator
61: Consignment storage tank 70: Lime treatment facility
71: slaked lime treatment tank 72: slaked lime storage tank
75: Reactant reservoir 80: Coagulant reservoir
S1: Designated waste reaction step S1a: Waste acid reaction step
S1b: waste alkaline reaction step S2: reaction wastewater flocculation step
S3: coagulated wastewater precipitation step S4: precipitation wastewater separation step
S5: Sludge dewatering step S6: Treated water recovery step
H: Piping P: Pump
S: Stirrer V: Valve

Claims (3)

delete delete A waste acid reaction step S1a for flowing waste acid into the reaction tank 20 and introducing the slaked liquor produced in the slaked lime treatment facility 70 into the reaction tank 20 to stir the waste acid and the slaked lime with the stirrer S to produce a reacted waste acid, )Wow,
A predetermined amount of waste alkali stored in the waste alkaline storage tank 12 is sent to the reaction tank 20 by the pump P and the aluminum sulfate is introduced into the reaction tank 20 so that the waste alkaline and aluminum sulfate are introduced into the reactor 20, (S) to generate a reaction waste alkaline, in the step (S1b) of the waste alkaline reaction,
A selective waste reaction step of selectively proceeding any one of the waste wastewater discharged from the reaction tank 20 or the reactive waste acid to maintain the ion concentration of the designated waste separated by the alkaline water into the reaction tank 20 at the pH 7, (S1);
A wasted acid flocculation step (S2a) of mixing an anionic flocculant into the reaction waste acid produced through the above-mentioned waste acid reaction step (S1a) and then stirring to produce an aggregated waste acid;
In the alkaline reaction step (S1b) in which the cationic coagulant is mixed with the reacted waste alkali generated through the above-mentioned waste alkaline reaction step (S1b) and then stirred to produce coagulated lung alkaline,
(S2) for selectively advancing any one of the plurality of reaction wastewater to promote the coalescence and coagulation of fine suspended matters contained in the reaction wastewater to produce aggregated wastewater containing the sludge;
The coagulated wastewater containing the sludge generated in the reaction wastewater agglomeration step S2 is gradually introduced into the settling tank 40 so that the sludge in the inflowed coagulated wastewater gradually precipitates to the lower end of the settling tank 40, A flocculation and sedimentation step (S3) of producing coagulated wastewater which is naturally separated;
The treated water separated at the upper end of the settling tank 40 by being separated through the coagulated wastewater settling step S3 is naturally discharged through the discharge path formed at the upper end of the settling tank 40 and flows into the treated water tank 50, A sedimentation wastewater separation step (S4) for introducing and discharging sludge into the dehydrator (60) through a pump (P);
The sludge introduced into the dehydrator 60 through the settling wastewater separation step S4 is dewatered into a solid state cake and a liquid state drain water so that the cake is immediately transferred to the consignment treatment vehicle 62 for consignment treatment, A sludge dewatering step (S5) for storing in a separate dwelling storage tank (61);
The treated water flowing into the treated water tank 50 through the settling wastewater separation step S4 is collected into the slaked lime processing facility 70 and the reaction tank 20 by using the pump P to react the waste acid, 75) to be used as influent water in the designated waste reaction step (S1) for reacting with the waste alkali, or to be used as influent water in the reaction wastewater flocculation step (S2) for collecting the reaction wastewater in the coagulant storage tank (80) A treated water recovery step (S6); And the plurality of designated wastes are processed by a circulation utilization processing device of one designated waste.
KR1020150135743A 2015-09-24 2015-09-24 Method and device for cyclic utilizing processing of designated waste KR101792340B1 (en)

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