KR102144372B1 - Apparatus for disposal of sludge - Google Patents

Abstract

The present invention relates to a dehydrated sludge reduction treatment device provided with a hypochlorous acid water mixing and solubilizing device. The dehydration sludge reduction treatment apparatus provided with the hypochlorous acid water mixing and solubilization apparatus of the present invention comprises: a solubilization apparatus into which dehydrated sludge subjected to a dehydration process by a dehydrator is added; And a device for drying, incineration, and solidification of dehydrated sludge connected to the solubilization device, and in which dewatered sludge is filled after solubilization.

Description

Dehydrated sludge reduction processor equipped with a hypochlorous acid water mixing and solubilizing device TECHNICAL FIELD [Apparatus for disposal of sludge]

The present invention relates to a dehydrated sludge reduction treatment device having a hypochlorous acid water mixing and solubilizing device, and more specifically, effectively reducing or extinction of dehydrated sludge that cannot be solved by the conventional heat drying method, incineration method, or solidification method. It relates to a dehydrated sludge reduction treatment device provided with a hypochlorous acid water mixing and solubilizing device.

Currently, most of the sewage and wastewater treatment methods applied to purify domestic and industrial wastewater are the activated sludge method, which is a biological treatment method in which medium temperature microorganisms are introduced into contaminated sewage and wastewater to undergo decomposition of organic matter. It is operated in various types of activated sludge method in the treatment phenomenon.

The medium temperature microorganisms used in the biological treatment method purify sewage and wastewater by ingesting organic matter in domestic or industrial wastewater. At this time, the population of microorganisms is multiplied, and the domestic sewage or industrial wastewater passing through the microbial reaction tank is precipitated and separated while passing through the sedimentation tank, which is a solid-liquid separation device, and discharged to the supernatant water with the microbial sludge removed. Part of the microbial sludge removed from the sedimentation tank is returned to the biological microbial reaction tank, and the excess activated sludge (also referred to as excess sludge or excess activated sludge) is generally transferred to a dehydrator to reduce moisture while reducing moisture. Next, it was discharged into dehydrated sludge in the form of a sludge cake and treated by a method of disposal.

Meanwhile, the amount of excess activated sludge that is essentially generated in such biological sewage and wastewater treatment methods is on the rise as the technology for treating sewage and wastewater is advanced. In fact, only in the sewage treatment process, surplus activated sludge after the dewatering process is generated in Korea over 4.4 million tons per year.

In order to reduce the moisture content of the excess activated sludge and recycle or landfill it, a dehydration process is operated to reduce the moisture content by reducing the moisture content by physical dehydration methods such as pressure or rotation, but the microorganism constituting the excess activated sludge is physically dewatering. It is only possible to remove water at the level of 20%, which corresponds to the free water of the cells of the carcass, and after dehydration, it has the characteristic that effective reduction treatment is possible only when more than 80% of the moisture bound in the cell wall of the microbial carcass is additionally removed.

Therefore, the treatment cost of dehydrated sludge waste is constantly rising due to the problem of consuming a lot of energy or expensive chemical costs in order to destroy the hard cell wall using the conventional heat drying method, incineration method, or solidification method. The situation is rising as a serious environmental problem along with the cause of an increase in treatment costs due to the prohibition of ocean dumping and the limit of landfill.

Currently, most of the development direction of sewage and wastewater treatment methods is advanced treatment technology for removing organic matter and TN and TP, but the current treatment that is being applied or developed for excess activated sludge inevitable during the treatment process. All of the technologies are focused on pretreatment processes that can reduce the amount and discharge of excess activated sludge. That is, there are ozone treatment, hydrogen peroxide treatment, and ultrasonic methods as physical/chemical treatment methods, and as biological treatment methods, treatment methods with thermophilic bacteria, alkaline bacteria, and anaerobic treatment methods are applied, but low treatment efficiency and economic efficiency are insufficient. Considering that the application is not smooth due to the problem, research and development on a dehydrated sludge reduction treatment device equipped with a previously unknown new concept of hypochlorous acid water mixing and solubilizing device is required.

Korean Intellectual Property Office Application No. 10-2003-0050743 Korean Intellectual Property Office Application No. 10-2009-0060325 Korean Intellectual Property Office Application No. 10-2011-0018774 Korean Intellectual Property Office Application No. 20-1983-0007336

It is an object of the present invention to provide a dehydrated sludge reduction processor having a hypochlorous acid water mixing solubilization device capable of effectively reducing or extinction of dehydrated sludge that cannot be solved by the conventional heat drying method, incineration method, or solidification method. will be.

Another object of the present invention is to break away from the concept of solubilization process, which has been concentrated only in the previous pretreatment process, and apply a solubilization technology suitable for treatment of excess activated sludge after dehydration, thereby providing high drying efficiency and breakthrough energy cost essential for reducing dehydrated sludge. It is to provide a dehydrated sludge reduction treatment device having a hypochlorous acid water mixing and solubilization device capable of achieving a reduction.

The above object is a solubilization device into which the dehydrated sludge that has undergone a dehydration process by a dehydrator is added; And a dehydrated sludge drying device, an incineration device, and a solidification device connected to the solubilizing device, wherein the dehydrated sludge is filled with the dehydrated sludge after solubilization.It is achieved by a dehydrated sludge reduction processor having a hypochlorous acid water mixing and solubilizing device.

The solubilizing device is provided with a paddle-type stirring device and a heating device, and a hypochlorous acid water generating device is coupled to the solubilizing device, and the hypochlorous acid water generated by the electrolysis process through the hypochlorous acid water generating device is hypochlorous acid. As it is introduced into the solubilizing device through a water supply pipe, it is mixed with dehydrated sludge in the solubilizing device, and as the paddle-type stirring process is performed by the paddle-type stirring device, the dehydrated sludge and hypochlorous acid water are effectively stirred in the solubilizing device. Can be.

A water supply pipe is connected to the hypochlorous acid water generating device, and a wet scrubber disposed around the solubilizing device and the solubilizing device are connected to a hypochlorous acid water supply pipe for removing odor, and the hypochlorous acid water supply pipe for removing the odor is the wet scrubber. And it may be connected to the hypochlorous acid water generating device.

An air discharge pipe is connected to one side of the wet scrubber, and a microbial preparation and a low molecular weight chemical (low molecular weight preparation) may be supplied to the solubilization device through a low molecular weight preparation supply pipe in a predetermined low molecular weight preparation supply device.

A controller for organically controlling the operation of the hypochlorous acid water generating device, the paddle-type stirring device, the low molecular weight agent supply device, and the dehydrated sludge drying, incineration and solidification device so that the dehydrated sludge can be effectively reduced or eliminated is further provided. Can include.

On the other hand, the above object is a microbial cell wall and polymer constituting the dehydrated sludge for the reduction and extinction of cake-shaped final dewatered sludge generated through a dehydrator operated to discard excess activated sludge in sewage and wastewater treatment plants. A paddle-type stirring device applied for the purpose of decomposing the coagulant and a closed-type or open-type chamber with a heating device or a solubilizing device configured in a cylindrical shape is applied, but the indirect heating method dryer and the disk method multi-stage dryer are conventional dewatered sludge drying reduction devices. , Rotary kiln type dryer, direct heating type dryer, circulating cooling condensing type dryer, and other drying devices, incineration devices, and solidification devices for the purpose of saving drying time, increasing drying efficiency, and reducing energy costs. Achieved by a dehydration sludge reduction treatment machine equipped with a hypochlorous acid water mixing and solubilization device?? May be.

As a control device for controlling an appropriate dosage and time, it may include an input sequence adjusted to prevent the death of microbial preparations injected with hypochlorous acid water and to increase the activity of low molecular weight chemicals.

According to the present invention, there is an effect of effectively reducing or extinction of dehydrated sludge that cannot be solved by the conventional heat drying method, incineration method, or solidification method.

In addition, according to the present invention, by applying a solubilization technology suitable for the treatment of excess activated sludge after dehydration, breaking away from the solubilization process concept that has been concentrated only in the previous pretreatment process, high drying efficiency and significant energy cost reduction essential for the reduction treatment of dehydrated sludge There is an effect that can achieve.

In addition, according to the present invention, the dehydration, drying reduction, incineration, and solidification technologies currently used for the treatment of excess activated sludge constitute excess activated sludge because the dehydration and drying technologies invented for the treatment of general organic waste are applied as they are. Dehydrated sludge that maintains high moisture content because the solubilization and low-molecularization processes for various flocculant formulations injected for the purpose of increasing the dehydration efficiency of activated sludge during the dehydration process and the convenience of transporting waste are not applied to the combined water bound inside the microbial cell wall being used. However, in the case of the present invention, microbial cell wall decomposition and coagulant of dehydrated sludge, coagulant, and polymer solids of dehydrated sludge are reduced to low molecular weight by applying them to the previous stage of the existing drying and incineration apparatus. There is an effect of reducing the amount of dehydrated sludge by 80% or more or enabling incineration treatment at the level of 30% of the energy cost and other utility costs incurred in the conventional method.

1 is a system circuit diagram to which a dehydrated sludge reduction processor having a hypochlorous acid water mixing and solubilizing device according to an embodiment of the present invention is applied.
FIG. 2 is a block diagram of a dehydrated sludge reduction treatment device including a hypochlorous acid water mixing and solubilizing device applied to FIG. 1.
3 is a control block diagram of FIG. 2.

Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings so that those of ordinary skill in the art may easily implement the present invention.

However, since the description of the present invention is merely an embodiment for structural or functional description, the scope of the present invention should not be construed as being limited by the embodiments described in the text.

For example, since the embodiments can have various modifications and various forms, the scope of the present invention should be understood to include equivalents capable of realizing the technical idea.

In addition, since the object or effect presented in the present invention does not mean that a specific embodiment should include all or only such effects, the scope of the present invention should not be understood as being limited thereto.

In the present specification, the present embodiment is provided to complete the disclosure of the present invention, and to fully inform a person of ordinary skill in the art to which the present invention belongs. And the invention is only defined by the scope of the claims.

Accordingly, in some embodiments, well-known components, well-known operations, and well-known techniques have not been described in detail in order to avoid obscuring interpretation of the present invention.

Meanwhile, the meaning of the terms described in the present invention is not limited to the dictionary meaning, and should be understood as follows.

When a component is referred to as being "connected" to another component, it should be understood that although it may be directly connected to the other component, another component may exist in the middle. On the other hand, when it is mentioned that a component is "directly connected" to another component, it should be understood that there is no other component in the middle. On the other hand, other expressions describing the relationship between the constituent elements, that is, "between" and "just between" or "neighboring to" and "directly neighboring to" should be interpreted as well.

Singular expressions are to be understood as including plural expressions unless the context clearly indicates otherwise, and terms such as "comprises" or "have" refer to specified features, numbers, steps, actions, components, parts, or It is to be understood that it is intended to designate that a combination exists and does not preclude the presence or addition of one or more other features or numbers, steps, actions, components, parts, or combinations thereof.

All terms used herein have the same meaning as commonly understood by one of ordinary skill in the field to which the present invention belongs, unless otherwise defined.

Terms defined in a commonly used dictionary should be interpreted as having the meaning of the related technology in context, and cannot be interpreted as having an ideal or excessively formal meaning unless explicitly defined in the present invention.

Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. In the description of the embodiments, the same reference numerals are assigned to the same components, and in some cases, the description of the same reference numerals will be omitted.

1 is a system circuit diagram to which a dehydration sludge reduction processor having a hypochlorous acid water mixing and solubilizing device according to an embodiment of the present invention is applied, and FIG. 2 is a dehydration sludge reduction having a hypochlorous acid water mixing and solubilizing device applied to FIG. A configuration diagram of the processor, and FIG. 3 is a control block diagram of FIG. 2.

Referring to these drawings, the dehydrated sludge reduction processor 100 according to the present invention enables effective reduction or extinction of dehydrated sludge that cannot be solved by the conventional heat drying method, incineration method, or solidification method. By breaking away from the solubilization process concept that has been focused only on the pretreatment process, and applying a solubilization technology suitable for the treatment of excess activated sludge after dehydration, it is possible to achieve high drying efficiency and a remarkable energy cost reduction, which is essential for the reduction treatment of dehydrated sludge.

In other words, the present invention is a solubilization technology for the purpose of effective reduction treatment and extinction of dehydrated sludge waste generated after the final dehydration treatment of excess activated sludge, and a highly active hypochlorous acid water generating device 102 and Highly active hypochlorous acid water (HOCI; Hypochlorous Acid Water) that is continuously generated and supplied by installing a biological and chemical solubilization device that makes the polymer structure of dehydrated sludge low molecular weight is installed in the pre-stage of drying, incineration, and solidification facilities of dehydrated sludge. ) And dehydration stages, destroying the solid cell walls of microorganisms and eluting the cytoplasm and bound water in the microorganisms, drastically reducing energy costs and waste disposal costs for treatment such as drying, incineration, and solidification of dehydrated sludge waste. It was made to be lowered.

As mentioned above, chemical methods using chemicals such as ozone and strong (acid) alkali, various oxidizing agents and catalysts that induce oxidation, which have been used in the existing pretreatment solubilization process, have enormous chemical costs and some secondary pollution. The problem arises.

In addition, the dehydration sludge after the dehydration process is discharged at a somewhat high moisture content due to low biodegradation and physical dehydration limits due to the influence of various coagulants and reactants used in the dehydration process. The simple drying method consumes a lot of energy cost for the reduction treatment and extinction treatment of dehydrated sludge.

However, when the dehydration sludge reduction processor 100 according to the present invention is applied, this problem can be solved.

Dehydration sludge reduction treatment device 100 according to the present invention for achieving the above object is connected to the solubilization device 101 and the solubilization device 101 to which the dehydrated sludge that has undergone a dehydration process by the dehydrator 105 is input, but after solubilization It includes a dewatered sludge drying, incineration and solidification device 113 connected to the solubilization device 101 in which the dehydrated sludge is filled.

The solubilization device 101 is provided with a paddle-type stirring device 103a and a heating device 103b. This solubilization device 101 may be manufactured in a cylindrical shape as a closed or open chamber. Of course, the solubilization device 101 does not necessarily have a cylindrical shape, and the scope of the present invention is not limited to the shape of the drawing.

Dehydrated sludge, which has undergone a dehydration process by a dehydrator 105, is introduced into the solubilization device 101. At this time, the hypochlorous acid water (HOCL) generated by the electrolysis process through the hypochlorous acid water generator 102 coupled to the solubilization device 101 is put into the solubilization device 101 through the hypochlorous acid water supply pipe 107 As the solubilization device 101 is mixed with the dehydrated sludge. At this time, as the paddle-type stirring process is performed by the paddle-type stirring device 103a, the dehydrated sludge and hypochlorous acid water are effectively stirred in the solubilizing device 101. A water supply pipe 109 is connected to the hypochlorous acid water generating device 102.

Through such agitation process, the cell wall of the dehydrated sludge is destroyed and all constituent materials and bound water are eluted to convert it into a solubilized state for easy drying and incineration.

It destroys the cell wall in the pretreatment process to promote hydrolysis through the elution of constituents, and converts the polymeric solids contained in the constituents into a low-molecular state that is easy to use in the digestion step to increase biodegradability and increase the activity of microorganisms to treat wastewater. There is a difference that solubilization proceeds for the purpose of increasing the drying efficiency of dehydrated sludge, unlike the purpose of solubilization to increase efficiency and reduce the amount of sludge generated.

Hypochlorous acid water generated in the electrolysis process of the hypochlorous acid water generating device 102 has a characteristic of undergoing a strong oxidation action. Here, hypochlorous acid water is a substance replaced by hydrogen (H) and chlorine (CL) of one water molecule (HOH). In other words, the oxidation number of the chlorine atom in the molecule of hypochlorous acid water is +1, and CL+ acts as a strong electrophilic species, so CL+ is selectively applied to bonding sites with high electron density such as C = C, CN, CN (including peptide bonds). As it acts, CL+ destroys the cell wall of dehydrated sludge through the process of taking two electrons (2e-) from other substances and becoming CL- by itself, thereby eluting constituent materials and bound water. According to the same function, the hypochlorous acid water generated through the hypochlorous acid water generating device 102 is also supplied for odor removal. Accordingly, since it can be applied to a wet scrubber (washing tower, 111), there is an advantage that it can be used for the purpose of destroying the cell wall as well as for the elimination of odors and harmful bacteria that may occur during the treatment of dehydrated sludge.

For the application of the wet scrubber 111, the wet scrubber 111 and the solubilizing device 101 are connected to the hypochlorous acid water supply pipe 110 for removing odor. The hypochlorous acid water supply pipe 110 for removing odor is also connected to the wet scrubber 111 and the hypochlorous acid water generator 102. At one side of the wet scrubber 111, an air discharge pipe 112 is connected, and a gas having completed odor removal is discharged to the atmosphere.

In addition, as the hypochlorous acid water generator 102 is directly applied to the solubilization device 101, chemicals such as ozone and strong (acid) alkali, which have been used in the existing pretreatment solubilization process, various oxidizing agents and catalysts that induce oxidation, etc. High economic efficiency can be secured by replacing the cost of purchasing expensive drugs for the chemical method with low electricity bills.

On the other hand, the cell wall destruction effect of hypochlorous acid water is maximized at the level of ph6 ~ 7, but in this case, hypochlorous acid water loses an effective concentration of about 80% in 30-40 days over time, as in this example. It can be said that it is most effective to directly connect the generator 102 to the solubilization device 101 to directly inject the hypochlorous acid water generated in the hypochlorous acid water generator 102 into the solubilization device 101.

In order to reduce the molecular weight of the polymer coagulant that can be coupled to the solubilization device 101 together with the hypochlorous acid water generator 102 and the polymer solid material contained in the dehydrated sludge, the low molecular weight formulation supply pipe ( 108), microbial preparations and low molecular weight chemicals (low molecular weight preparations) are supplied. This acts on the dehydrated sludge, which is first solubilized after the destruction of the cell wall of hypochlorous acid water, and the microbial agent and low molecular weight chemicals introduced through it are effective decomposition of organic substances and low molecular weight of high molecular solid substances, after the solubilization device 101. In the dewatered sludge drying, incineration and solidification device 113, it is possible to achieve a breakthrough energy reduction effect.

The dehydrated sludge drying, incineration, and solidification device 113 is filled with dehydrated sludge 114 after solubilization has proceeded, which may be discharged through the discharge device 115.

On the other hand, the controller 130 is a hypochlorous acid water generating device 102, a paddle-type stirring device 103a, a heating device 103b, a low molecular weight agent supply device 104 so that the dehydrated sludge can be effectively reduced or extinct. The operation of the dewatered sludge drying, incineration and solidification device 113 is organically controlled.

The controller 130 performing this role may include a central processing unit 131 (CPU), a memory 132 (MEMORY), and a support circuit 133 (SUPPORT CIRCUIT).

The central processing unit 131 is a hypochlorous acid water generating device 102, a paddle-type stirring device 103a, a heating device 103b, and a low molecular weight agent supply device so that the dehydrated sludge can be effectively reduced or extinct in this embodiment. It may be one of various computer processors that can be applied industrially in order to organically control the operation of 104 and the dewatered sludge drying, incineration and solidification apparatus 113.

The memory 132 (MEMORY) is connected to the central processing unit 131. The memory 132 can be installed locally or remotely as a computer-readable recording medium, and can be easily used, such as random access memory (RAM), ROM, floppy disk, hard disk, or any digital storage type. It may be at least one or more memories.

The support circuit 133 (SUPPORT CIRCUIT) is coupled to the central processing unit 131 to support the typical operation of the processor. The support circuit 133 may include a cache, a power supply, a clock circuit, an input/output circuit, a subsystem, and the like.

In this embodiment, the controller 130 is a hypochlorous acid water generating device 102, a paddle-type stirring device 103a, a heating device 103b, a low molecular weight agent supply device 104 so that the dehydrated sludge can be effectively reduced or extinct. ) And dewatered sludge drying, incineration, and solidifying operation of the apparatus 113 are organically controlled, and such a series of control processes may be stored in the memory 132. Typically software routines may be stored in memory 132. Software routines can also be stored or executed by other central processing units (not shown).

Although the process according to the present invention has been described as being executed by a software routine, it is also possible that at least some of the processes of the present invention are performed by hardware. As such, the processes of the present invention may be implemented by software executed on a computer system, or by hardware such as an integrated circuit, or by a combination of software and hardware.

According to the present invention having the structure and action as described above, it is possible to effectively reduce or extinct dehydrated sludge that cannot be solved by the conventional heat drying method, incineration method, or solidification method.

In addition, according to the present invention, by applying a solubilization technology suitable for the treatment of excess activated sludge after dehydration, breaking away from the solubilization process concept that has been concentrated only in the previous pretreatment process, high drying efficiency and significant energy cost reduction essential for the reduction treatment of dehydrated sludge Can be achieved.

On the other hand, the dehydration, drying reduction, incineration, and solidification technologies currently used for the treatment of excess activated sludge use the dehydration and drying technologies invented for the treatment of general organic waste, so the microbial cell wall that constitutes the excess activated sludge To increase the dehydration efficiency of activated sludge during the dehydration process and the combined water bound inside and to facilitate waste transport, the solubilization and low-molecularization processes for various flocculant formulations are not applied, so that the dehydrated sludge that maintains a high moisture content is directly dried or Although there was a limitation in that the energy source required for incineration was excessively consumed, in the case of the present invention, when the microbial cell wall decomposition and coagulant of dehydrated sludge, and polymer solids were reduced to a low molecular weight by applying it to the previous stage of the existing drying and incineration device, Dehydration sludge can be reduced by 80% or more or incinerated at the level of 30% of energy costs and other utility costs incurred during the process.

As described above, the present invention is not limited to the described embodiments, and it is obvious to those of ordinary skill in the art that various modifications and variations can be made without departing from the spirit and scope of the present invention. Therefore, it should be said that such modifications or variations belong to the claims of the present invention.

100: dehydrated sludge reduction processor 101: solubilization device
102: hypochlorous acid water generator 103a: paddle-type stirring device
103b: heating device 104: low molecular weight formulation supply device
105: dehydrator 106: dewatering sludge
107: hypochlorous acid water supply pipe 108: low molecular weight agent supply pipe
109: water supply pipe
110: Hypochlorous acid water supply pipe for odor removal
111: wet scrubber (washing tower) 112: air discharge pipe
113: Dewatered sludge drying, incineration and solidification device
114: dehydrated sludge after solubilization 115: discharge device

Claims (7)

A solubilization device into which the dehydrated sludge that has undergone a dehydration process by a dehydrator is added; And
A dewatered sludge drying device, an incineration device, and a solidification device connected to the solubilization device and filled with dehydrated sludge after solubilization;
The solubilization device is provided with a paddle-type stirring device and a heating device for decomposing the microbial cell wall and the polymer coagulant constituting the dehydrated sludge,
The hypochlorous acid water generator is coupled to the solubilization device, and as the hypochlorous acid water generated by the electrolysis process through the hypochlorous acid water generator is introduced into the solubilization device through the hypochlorous acid water supply pipe, dehydration sludge in the solubilization device Mixed,
Dehydrated sludge and hypochlorous acid water are effectively agitated in the solubilization device as the paddle-type stirring process is performed by the paddle-type stirring device;
A water supply pipe is connected to the hypochlorous acid water generating device,
A wet scrubber is disposed around the solubilization device, and the wet scrubber is provided with a hypochlorous acid water mixing solubilization device, characterized in that it is connected to the solubilization device and the hypochlorous acid water generator and each supply pipe for odor removal Dehydration sludge reduction treatment. delete delete delete delete delete delete

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