Sludge treatment system and sludge treatment method using the same

Abstract

According to one embodiment of the present invention, a sludge treatment system is provided, comprising: a pretreatment unit through which sludge introduced through an input hopper passes; wherein the pretreatment unit comprises a conveying unit for conveying sludge, a first crushing unit disposed outside the conveying unit for crushing sludge by applying impact to the sludge being conveyed on the conveying unit, and a hot air supply unit disposed outside the conveying unit for supplying hot air to the sludge moving on the conveying unit.

Description

Technology Field

[0001] Embodiments of the present invention relate to a sludge treatment system and a sludge treatment method using the same. Background Technology

[0002] Generally, wastewater or filth, such as domestic wastewater, is not disposed of as is but can be discharged or discarded after undergoing appropriate treatment at a sewage treatment plant or similar facility. Such wastewater, sewage, or filth can first undergo a primary dewatering process to be converted into a sludge form.

[0003] This sludge can be used for various purposes or treated for disposal.

[0004] Meanwhile, this sludge has a high moisture content and can have a certain shape, such as a cake.

[0005] However, even for sludge in this form, a drying process must be carried out to obtain a form that is relatively easy to handle. Through this, the disposal or recycling of the sludge for other uses can be easily carried out.

[0006] However, there are limitations to easily proceeding with the treatment of such sludge due to problems such as it being difficult to handle because it contains a large amount of moisture and requires high heat during drying. The problem to be solved

[0007] Embodiments of the present invention provide a sludge treatment system and a sludge treatment method that can easily handle sludge and effectively treat sludge with low power consumption.

[0008] In addition, the efficiency of sludge utilization can be improved by carrying out a drying process after performing a process of crushing (or grinding) sewage sludge, livestock manure, food waste, etc., at least once. means of solving the problem

[0009] One embodiment of the present invention provides a sludge treatment system comprising: a pretreatment unit through which sludge introduced through an input hopper passes; wherein the pretreatment unit comprises: a conveying unit for conveying the sludge; a first crushing unit disposed outside the conveying unit and crushing the sludge by applying impact to the sludge being conveyed on the conveying unit; and a hot air supply unit disposed outside the conveying unit and supplying hot air to the sludge moving on the conveying unit.

[0010] In this embodiment, the pretreatment unit may further include a pretreatment unit through which the sludge that has passed through the pretreatment unit passes and which reduces the temperature of the sludge.

[0011] In the present embodiment, the apparatus further comprises a freezing unit formed to perform a freezing treatment step for the sludge; and a second crushing unit into which at least the sludge that has undergone the freezing treatment step is introduced from the freezing unit, wherein the second crushing unit receives the sludge along the direction of gravity from the freezing unit and can crush the sludge by applying impact to the sludge.

[0012] In this embodiment, a drying unit may be further included to perform a drying treatment on the sludge processed in at least the second crushing unit.

[0013] In this embodiment, the second crushing unit may include a processing body that applies impact to the sludge flowing in from the freezing unit; and a processing transfer unit that transfers the sludge discharged from the processing body.

[0014] In the present embodiment, the processing body may include: a processing housing having a hollow interior; and a second crushing body installed inside the processing housing and capable of contacting and impacting sludge flowing into the processing housing.

[0015] In this embodiment, the second crushing unit is provided in multiple numbers, and the sludge that has undergone the freezing treatment step can gradually decrease in size as it passes through the multiple second crushing units.

[0016] In the present embodiment, the freezing unit includes a freezing unit and a freezing treatment area, the freezing unit is formed to provide a freezing atmosphere for the freezing treatment area, and the freezing treatment area may include a space capable of carrying out a freezing treatment step for the sludge.

[0017] In this embodiment, the pretreatment unit may perform preliminary treatment of the sludge before proceeding with the freezing treatment step through the freezing unit.

[0018] In the present embodiment, the drying unit includes a heat generating unit and a drying space, and

[0019] The heat generating unit is formed to provide heat to the drying space, and the drying space may be formed to place the sludge and receive heat from the heat generating unit to carry out a drying treatment for the sludge.

[0020] According to one embodiment of the present invention, a method for treating sludge comprises a preliminary treatment step in which a preliminary treatment unit performs preliminary treatment on sludge introduced through an input hopper; wherein the preliminary treatment unit comprises a conveying unit for conveying the sludge; a first crushing unit for crushing the sludge by applying impact to the sludge; and a hot air supply unit for supplying hot air to the sludge; wherein, in the preliminary treatment step, the first crushing unit crushes the sludge by applying impact to the sludge being conveyed on the conveying unit, and simultaneously supplies hot air to the sludge being conveyed on the conveying unit.

[0021] In the present embodiment, the method comprises: a freezing treatment step formed to perform a freezing treatment step for the sludge in a freezing unit; and a crushing treatment step in which crushing is performed on the sludge after at least the freezing treatment step in a second crushing unit; wherein the second crushing unit receives the sludge along the direction of gravity from the freezing unit and crushes the sludge by applying impact to the sludge.

[0022] In the present embodiment, the crushing treatment step may further include a drying step for at least the sludge after crushing.

[0023] In the present embodiment, the freezing treatment step may further include a preliminary crushing step of crushing the sludge at least before the freezing treatment is completed.

[0024] In this embodiment, the sludge preparation step for preparing the sludge before proceeding with the preliminary treatment step is included, and the sludge preparation step may prepare sludge containing a coagulating substance for coagulation of the sludge.

[0025] Other aspects, features, and advantages other than those described above will become clear from the following drawings, claims, and detailed description of the invention. Effects of the invention

[0026] The sludge treatment system and sludge treatment method according to the present embodiment can easily handle sludge and effectively treat sludge with low power consumption.

[0027] In addition, the process of crushing (or grinding) sewage sludge, livestock manure, food waste, etc. at least once in the pretreatment unit, pretreatment unit, and second crushing unit, and then proceeding with the drying process in the drying unit, can have the effect of improving the efficiency of sludge utilization. Brief explanation of the drawing

[0028] FIG. 1 is a schematic diagram illustrating a sludge treatment system according to one embodiment of the present invention. FIG. 2 is a drawing partially illustrating a preprocessing unit according to one embodiment of the present invention. Figure 3 is a bottom view illustrating part A of Figure 2. FIG. 4 is a schematic diagram illustrating a freezing unit according to one embodiment of the present invention. FIG. 5 is a schematic diagram illustrating a crushing unit according to one embodiment of the present invention. FIG. 6 is a schematic diagram illustrating a freezing unit and a crushing unit according to one embodiment of the present invention. FIG. 7 is a schematic diagram illustrating a crushing unit according to one embodiment of the present invention. FIG. 8 is a schematic diagram illustrating a processing body according to one embodiment of the present invention. FIG. 9 is a schematic diagram illustrating a drying section according to one embodiment of the present invention. FIG. 10 is a flowchart illustrating a sludge treatment method according to one embodiment of the present invention. Specific details for implementing the invention

[0029] The present invention is capable of various modifications and may have various embodiments; specific embodiments are illustrated in the drawings and described in detail in the detailed description. The effects and features of the present invention, and the methods for achieving them, will become clear by referring to the embodiments described below in detail together with the drawings. However, the present invention is not limited to the embodiments disclosed below but can be implemented in various forms.

[0030] Hereinafter, embodiments of the present invention will be described in detail with reference to the attached drawings. When describing with reference to the drawings, identical or corresponding components are given the same reference numerals, and redundant descriptions thereof will be omitted.

[0031] In the following embodiments, terms such as first, second, etc. are used not in a limiting sense, but for the purpose of distinguishing one component from another component.

[0032] In the following examples, singular expressions include plural expressions unless the context clearly indicates otherwise.

[0033] In the following embodiments, terms such as "include" or "have" mean that the features or components described in the specification are present, and do not preclude the possibility that one or more other features or components may be added.

[0034] In the drawings, the size of components may be exaggerated or reduced for convenience of explanation. For example, the size and thickness of each component shown in the drawings are depicted arbitrarily for convenience of explanation, so the present invention is not necessarily limited to what is illustrated.

[0035] In the following embodiments, the x-axis, y-axis, and z-axis are not limited to three axes in an orthogonal coordinate system and can be interpreted in a broader sense that includes them. For example, the x-axis, y-axis, and z-axis may be orthogonal to each other, but they may also refer to different directions that are not orthogonal to each other.

[0036] Where an embodiment can be implemented differently, a specific process sequence may be performed differently from the order described. For example, two processes described consecutively may be performed substantially simultaneously or proceed in the reverse order of the description.

[0037] FIG. 1 is a schematic diagram illustrating a sludge treatment system according to an embodiment of the present invention. FIG. 2 is a partially illustrated diagram of a pretreatment unit according to an embodiment of the present invention. FIG. 3 is a bottom view illustrating part A of FIG. 2. FIG. 4 is a schematic diagram illustrating a freezing unit according to an embodiment of the present invention. FIG. 5 is a schematic diagram illustrating a crushing unit according to an embodiment of the present invention. FIG. 6 is a schematic diagram illustrating a freezing unit and a crushing unit according to an embodiment of the present invention. FIG. 7 is a schematic diagram illustrating a crushing unit according to an embodiment of the present invention. FIG. 8 is a schematic diagram illustrating a treatment main body according to an embodiment of the present invention. FIG. 9 is a schematic diagram illustrating a drying unit according to an embodiment of the present invention. FIG. 10 is a flowchart illustrating a sludge treatment method according to an embodiment of the present invention.

[0038] Referring to FIGS. 1 to 9, a sludge treatment system (100) according to one embodiment of the present invention may include a pretreatment unit (120), a pretreatment unit (130), a freezing unit (140), a second crushing unit (150), a drying unit (160), and a receiving unit (170).

[0039] A sludge treatment system (100) according to one embodiment of the present invention is a system for treating sludge (S) and can treat sludge (S) containing moisture.

[0040] A sludge treatment system (100) according to one embodiment of the present invention can treat various types of sludge (S), for example, may include sludge (S) collected from a storage facility that stores sewage, wastewater, or filth, or from a treatment plant that treats them.

[0041] As an optional embodiment, a sludge treatment system (100) according to one embodiment of the present invention can treat sludge (S) containing an aggregating material. Specifically, such sludge (S) may contain a polymer as an aggregating material for aggregating the sludge (S).

[0042] As an optional example, the sludge (S) may have a moisture content value of 50 to 90%, specifically, about 80%, using this polymer flocculant.

[0043] Referring to FIGS. 1 to 3, a pretreatment unit (120) according to one embodiment of the present invention performs a preliminary treatment of sludge (S) before proceeding with a freezing treatment step through a freezing unit (140) to be described later, and at least one such unit may be provided.

[0044] A pretreatment unit (120) according to one embodiment of the present invention is a sludge that passes through an input hopper (110) and can be positioned between an input hopper (110) and a freezing unit (140).

[0045] As an optional embodiment, the pretreatment unit may be located between the input hopper (110) and the pretreatment unit (130) to be described later.

[0046] Referring to FIG. 1, the pretreatment unit (120) allows the sludge (S) flowing into the sludge treatment system (100) according to one embodiment of the present invention through the input hopper (110) to pass through first.

[0047] Referring to FIG. 1, an input hopper (110) according to one embodiment of the present invention receives sludge (S) supplied from the outside and discharges it to a pretreatment unit (120), and although not shown in the drawing, a crushing module may be provided.

[0048] A crushing module provided in an input hopper (110) can crush sludge (S) supplied from the outside to reduce its volume, and a flattening module (not shown in the drawing) driven by power supplied from the outside can flatten the sludge (S) whose volume has been reduced by the crushing module so that it is transported at a preset height.

[0049] The pretreatment unit (120) receives sludge (S) from the input hopper (110), and can supply the sludge (S) to the pretreatment unit (130) and the freezing unit (140) by stirring, crushing, and drying the sludge (S).

[0050] A pretreatment unit (120) according to one embodiment of the present invention can perform physical treatment on sludge (S). As a result, the size of the sludge (S) that has passed through the pretreatment unit (120) can be reduced to a size below a preset range.

[0051] As an optional embodiment, the pretreatment unit (120) may pass through a roll mill (not shown in the drawing) and perform physical treatment on the sludge (S).

[0052] As an optional embodiment, in the pretreatment unit (120) according to one embodiment of the present invention, microorganisms, coagulants, etc. may be introduced into the sludge (S).

[0053] Referring to FIGS. 1 and 2, a pre-processing unit (120) according to one embodiment of the present invention may include a first crushing unit (121), a conveying unit (124), and a hot air supply unit (125).

[0054] Referring to FIGS. 1 and 2, a conveying unit (124) according to one embodiment of the present invention is positioned close to an input hopper (110) and can convey sludge (S) introduced through the input hopper (110).

[0055] Referring to FIGS. 1 and FIGS. 2, the conveying unit (124) can move the sludge (S) in a preset direction (X-axis direction based on FIG. 2) using a conveyor.

[0056] A transfer unit (124) according to one embodiment of the present invention may include a transfer body (drawing symbol not set) and a transfer driving unit (drawing symbol not set), and may be driven in an endless track manner.

[0057] Specifically, sludge (S) is placed on a conveying body surrounding a conveying drive unit that is equipped with multiple units, and as the conveying drive unit rotates clockwise (based on FIG. 2) with respect to the rotation center axis (AX1), the conveying body and the sludge (S) located on the conveying body can move in a preset direction (-X-axis direction based on FIG. 2).

[0058] Referring to FIG. 1 and FIG. 2, a first crushing unit (121) according to one embodiment of the present invention is positioned on the outside of a conveying unit (124), and can crush the sludge (S) by applying impact to the sludge (S) being conveyed on the conveying unit (124).

[0059] According to one embodiment of the present invention, a plurality of first crushing units (121) may be provided and may be spaced apart at a predetermined interval from the outside of the conveying unit (124). As a result, sludge (S) may be crushed and stirred while passing through one of the first crushing units (121), and after conveying at a predetermined interval, it may be crushed and stirred again while passing through another first crushing unit (121).

[0060] Referring to FIG. 1 and FIG. 2, a first crushing unit (121) according to one embodiment of the present invention may include a shaft unit (122) and a first crushing body (123).

[0061] Referring to FIG. 2, the shaft portion (122) according to one embodiment of the present invention receives power from the outside and provides rotational power to the first crushing body (123), and can rotate clockwise or counterclockwise with respect to a rotational center axis (AX2) formed parallel to the rotational center axis (AX1) of the conveying portion (124), specifically the conveying drive portion.

[0062] Referring to FIG. 2, the first crushing body (123) is connected to the shaft section (122) and can crush the sludge (S) being conveyed on the conveying section (124) by applying impact to it. A plurality of the first crushing bodies (123) are provided, and the plurality of first crushing bodies (123) can be spaced apart along the longitudinal central axis of the shaft section (122).

[0063] Referring to FIG. 1 and FIG. 2, a first crushing body (123) according to one embodiment of the present invention may be fixed in position and connected to a shaft portion (122), and a plurality of crushing protrusions (123ST) may be formed protruding outward.

[0064] The crushing projection (123ST) rotates as the first crushing section (121), specifically the shaft section (122) and the first crushing body (123) connected to the shaft section (122), rotates, and can come into contact with the sludge (S) located on the conveying section (124).

[0065] As the crushing projection (123ST) can come into contact with the sludge (S), it can crush the sludge (S) by applying impact to it. As the first crushing body (123), specifically the crushing projection (123ST), crushes the sludge (S), the sludge (S) can be crushed into relatively small sizes.

[0066] A crushing projection (123ST) according to one embodiment of the present invention is formed to protrude outwardly on the outer surface of the first crushing body (123), and at least one bending section (drawing reference numeral not set) may be formed.

[0067] Since a bending section is formed in the crushing projection (123ST), the sludge (S) being transported on the transport section (124) can be effectively crushed, and the sludge (S) can be well mixed with microorganisms, coagulants, etc.

[0068] As an optional embodiment, a plurality of first crushing bodies (123) spaced apart and positioned in close proximity on the shaft portion (122) may be arranged such that the crushing protrusions (123ST) formed on each may not overlap each other.

[0069] Specifically, a plurality of crushing protrusions (123ST) are provided along the outer circumference of the first crushing body (123) and can be spaced apart. When a crushing protrusion (123ST) is formed on the outer circumference of one of the first crushing bodies (123), a crushing protrusion (123ST) is not formed in the area corresponding to the one crushing protrusion (123ST) on the outer circumference of another first crushing body (123), and a crushing protrusion (123ST) can be formed in the area on the outer circumference of the other first crushing body (123) corresponding to the area where a crushing protrusion (123ST) is not formed on the outer circumference of the one of the first crushing bodies (123).

[0070] As a result, the crushing protrusions (123ST) formed on each of the first crushing bodies (123) in a predetermined area of ​​the sludge (S) being transported on the transport unit (124) apply impact to the sludge (S) at different times, thereby allowing the sludge (S) to be effectively crushed and, at the same time, mixed well with microorganisms and coagulants.

[0071] Referring to FIGS. 1 to 3, a hot air supply unit (125) according to one embodiment of the present invention is positioned outside the conveying unit (124) and can supply hot air (H) to sludge (S) moving on the conveying unit (124).

[0072] Referring to FIGS. 1 to 3, the hot air supply unit (125) can receive hot air (H) from the outside and provide high-temperature hot air (H) to the sludge (S) being transported on the transport unit (124).

[0073] Referring to FIGS. 1 and 2, a hot air supply unit (125) according to one embodiment of the present invention may include a hot air supply main body (126).

[0074] Referring to FIGS. 1 and 2, the hot air supply body (126) is formed to extend along the longitudinal direction (X-axis direction based on FIG. 2) and has a hollow interior, and can receive hot air from the outside and discharge it as sludge (S) being transported on the transport section (124).

[0075] Referring to FIGS. 1 and 2, a hot air supply body (126) according to one embodiment of the present invention may be formed to extend along the longitudinal direction of the conveying section (124), specifically along the conveying direction of the sludge (S) (X-axis direction based on FIG. 2).

[0076] Referring to FIGS. 1 and 2, the hot air supply body (126) is positioned on the outside of the conveying unit (124), and a first crushing unit (121) may be positioned between the hot air supply body (126) and the conveying unit (124).

[0077] As a result, the sludge (S) moving on the conveying unit (124) can be crushed and stirred by the first crushing unit (121), and at the same time, the hot air (H) discharged from the hot air supply unit (125), specifically the hot air supply main body (126), can dry the sludge (S) and evaporate the moisture contained in the sludge (S).

[0078] According to one embodiment of the present invention, the hot air supply body (126) can be extended to a length corresponding to the transport path of the sludge (S) transported on the transport unit (124). As a result, the sludge (S) transported on the transport unit (124) can be crushed and stirred by the first crushing unit (121), and at the same time, receive hot air (H) from the hot air supply unit (125) to be rapidly dried.

[0079] Referring to FIGS. 1 to 3, a discharge hole (126H) may be formed on one side of the hot air supply body (126) according to one embodiment of the present invention, specifically on the side facing the conveying part (124) (lower surface based on FIG. 2).

[0080] Hot air (H) can be supplied through the discharge hole (126H) toward the sludge (S) being transported on the transport section (124) inside the hot air supply main body (126).

[0081] Referring to FIG. 3, a plurality of discharge holes (126H) according to one embodiment of the present invention may be provided and may be arranged in a row.

[0082] Referring to FIG. 3, the discharge hole portion (126H) according to one embodiment of the present invention has a preset diameter and is formed in a circular shape, but is not limited thereto and can be formed in a rectangular shape or extended in the longitudinal direction (up and down direction based on FIG. 3), and various modifications are possible.

[0083] Referring to FIGS. 1 to 3, a hot air guide part (127) according to one embodiment of the present invention can be coupled to a hot air supply body (126) and can guide the flow path of hot air (H) discharged from a discharge hole part (126H).

[0084] The hot air guide section (127) can be attached to one side of the hot air supply body (126) where the discharge hole section (126H) is formed, and can be formed in the shape of a partition wall. Multiple hot air guide sections (127) may be provided and may be arranged facing each other with the discharge hole section (126H) in between.

[0085] As a result, the hot air (H) discharged from inside the hot air supply body (126) to the outside, specifically to the sludge (S) being transported on the transport section (124) through the discharge hole (126H), can be concentratedly sprayed toward the sludge (S), and the sludge (S) can be effectively dried and the moisture contained in the sludge (S) can be rapidly evaporated and removed.

[0086] Referring to FIG. 2, according to one embodiment of the present invention, the discharge hole portion (126H) may be formed in a plurality of sections along the length direction of the hot air supply body (126), and the hot air guide portion (127) may also be arranged facing each other with the discharge hole portion (126H) formed in the plurality of sections in between so as to correspond thereto.

[0087] As a result, the sludge (S) is transported on the transport section (124), crushed and stirred by the first crushing section (121), and at the same time, hot air (H) is continuously supplied from the hot air supply section (125) arranged parallel to the length direction of the transport section (124), thereby having the effect of rapidly evaporating and removing the moisture contained therein.

[0088] Referring to FIGS. 1 and 2, a hot air guide (127) according to one embodiment of the present invention is coupled perpendicularly to a surface (lower surface in FIG. 2) where a discharge hole (126H) is formed facing a conveying part (124), but is not limited thereto and can be coupled at a predetermined angle to the surface to allow for radial discharge of hot air (H), and various modifications are possible.

[0089] This preliminary treatment, performed in the preliminary treatment unit (120) according to one embodiment of the present invention, can be carried out using various devices that apply compressive force, shear force, tensile force, or frictional force to the sludge (S).

[0090] Referring to FIG. 1, a pretreatment unit (130) according to one embodiment of the present invention is through which sludge (S) that has passed through a pretreatment unit passes, and can reduce the temperature of the sludge. The pretreatment unit (130) may include a first pretreatment body (131) and a second pretreatment body (135).

[0091] The first pretreatment body (131) and the second pretreatment body (135) may each include a crushing module (CM) and a transfer module (TM).

[0092] As an optional embodiment, the first pretreatment body (131) and the second pretreatment body (135) may share a transfer module (TM), and sludge (S) may be transferred on the transfer module (TM) and crushed by a crushing module (CM).

[0093] A pretreatment unit (130) according to one embodiment of the present invention may include an air conditioning device such as an air conditioner (not shown in the drawing) and a refrigerant injection unit (not shown in the drawing).

[0094] Specifically, in the first pretreatment body (131), the temperature of the sludge (S) can be first formed to 15 degrees Celsius or lower by an air conditioning device such as an air conditioner before freezing of the moisture in the sludge (S) proceeds at 0 degrees Celsius or lower in the freezing unit (140) to be described later. The moisture in the sludge (S) can be discharged to the outside using this temperature difference.

[0096] The second pretreatment body (135), which receives sludge (S) from the first pretreatment body (131), can inject refrigerant into the sludge (S) at the refrigerant inlet and can lower the temperature of the sludge (S) to reach 0 degrees Celsius, and can additionally discharge moisture within the sludge (S) to the outside using this temperature difference.

[0097] Referring to FIGS. 1, FIGS. 4, and FIGS. 10, a freezing unit (140) according to one embodiment of the present invention is formed to perform a freezing treatment step (S30) for sludge (S), and may include a freezer (141) and a freezing treatment area (143).

[0098] Referring to FIG. 1 and FIG. 4, a freezing unit (140) according to one embodiment of the present invention can perform freezing treatment on sludge (S) supplied from a pretreatment unit (120) so that at least one area of ​​the sludge (S) can be solidified.

[0099] A freezing unit (140) according to one embodiment of the present invention may include a refrigerator (141) that supplies or transmits cold air, and may include a freezing space for performing freezing treatment on sludge (S).

[0100] A refrigerator (141) according to one embodiment of the present invention may be formed in various forms and may include various forms of refrigerators (141), such as compressed air or refrigerant.

[0101] As an optional embodiment, if the freezing unit (140) includes a freezing space, the sludge (S) can be frozen while moving over at least one area.

[0102] As an optional embodiment, if the freezing unit (140) includes a freezing space, crushing of the sludge (S) can be performed simultaneously with or immediately after freezing treatment, and for this purpose, one or more crushing modules (not shown in the drawing) may be placed in the freezing space of the freezing unit (140).

[0103] In the present specification, 'freezing space' refers to a freezing treatment area (143), and the freezing space can be connected to a freezer (141), through which freezing treatment of sludge (S) can be performed in the freezing space.

[0104] Referring to FIG. 4, a freezing treatment area (143) according to one embodiment of the present invention may include a housing so as to be distinguished from the outside in at least one area, and a refrigerator (141) may be connected to the outside of such a housing.

[0105] However, it is not limited to this, and various modifications are possible, such as installing a refrigerator (141) inside the housing.

[0106] A freezing unit (140) according to one embodiment of the present invention can improve the efficiency of the freezing treatment step by performing freezing treatment on sludge (S) in a freezing treatment area (143).

[0107] As an optional embodiment, at least one blower (not shown in the drawing) may be disposed in the freezing treatment area (143), and the blower has the effect of effectively dispersing the cold air supplied from the refrigerator (141) into the freezing treatment area (143).

[0108] A freezing unit (140) according to one embodiment of the present invention may be formed to allow freezing treatment of the sludge (S) in an atmosphere of at least 0 degrees Celsius or lower so that freezing of the moisture within the sludge (S) can be carried out for freezing treatment of the sludge (S).

[0109] As an optional embodiment, the freezing unit (140) may be formed to perform freezing treatment on the sludge (S) in an atmosphere of minus 10 to 20 degrees Celsius.

[0110] As an optional embodiment, the freezing unit (140) may be formed to perform freezing treatment on the sludge (S) in an atmosphere of minus 10 degrees to minus 40 degrees Celsius.

[0111] Specifically, the freezing unit (140) can lower the temperature of the freezing treatment area (143) to minus 35 degrees Celsius or lower, and includes at least one pressurizing module (not shown in the drawing) that pressurizes the sludge (S) in contact, and can spread the height of the accumulated sludge (S) contained in the freezing space to a predetermined thickness, specifically 3 mm. The freezing unit (140) can spread the sludge (S) and undergo a freezing treatment process to lower the temperature, thereby freezing the moisture present in the sludge (S) and discharging it to the outside.

[0112] As an optional embodiment, the freezing unit (140) may be formed to rapidly perform freezing treatment on the sludge (S) in an atmosphere of minus 40 degrees Celsius or lower.

[0113] Referring to FIG. 1 and FIG. 4, when freezing treatment is performed on sludge (S) through a freezing unit (140) according to one embodiment of the present invention, at least one area, a plurality of areas, or the entire area of ​​the sludge (S) may be frozen and solidified, and a second crushing unit (150) to be described later may crush the solidified sludge (S) to form a plurality of lumps of appropriate size.

[0114] Referring to FIGS. 1, 5 to 8, the second crushing unit (150) according to one embodiment of the present invention receives sludge (S) that has undergone at least a freezing treatment step from the freezing unit (140), and can crush the sludge (S) by receiving the sludge (S) from the freezing unit (140) and applying impact to the sludge (S).

[0115] Referring to FIGS. 6 and 7, a second crushing unit (150) according to one embodiment of the present invention may receive sludge (S) from a freezing unit (140) in the direction of gravity (upper to lower direction according to FIG. 6), and as the sludge (S) passes through the second crushing unit (150) in the direction of gravity (upper to lower direction according to FIG. 6), it may be reduced to a predetermined size by impact.

[0116] Referring to FIG. 5, a second crushing unit (150) according to one embodiment of the present invention may include a processing body (151), a processing transfer unit (155), and a transfer input unit (157).

[0117] The second crushing unit (150) according to one embodiment of the present invention may utilize various devices, for example, may include a crushing roll. The second crushing unit (150) can crush the sludge (S) solidified in the freezing unit (140) to form a plurality of lumps of appropriate size.

[0118] As an optional embodiment, the second crushing unit (150) according to one embodiment of the present invention may include various devices for applying strong pressure to the sludge (S), for example, may include at least one hammer, and may include a corresponding stage corresponding to the hammer and the sludge (S).

[0119] Referring to FIG. 1, the second crushing unit (150) according to one embodiment of the present invention crushes the sludge (S) flowing in from the freezing unit (140) by applying impact to it, but is not limited thereto. Various modifications are possible, such as crushing the sludge (S) that is frozen in the freezing unit (140), specifically in the freezing treatment area (143), while freezing in the freezing unit (140).

[0120] Referring to FIGS. 6 to 8, a processing body (151) according to one embodiment of the present invention can be placed on the discharge path of sludge (S) discharged from the freezing unit (140) so as to apply impact to the sludge (S) flowing in from the freezing unit (140).

[0121] Referring to FIG. 1, sludge (S) discharged from a freezing unit (140) according to one embodiment of the present invention can be moved to the upper side (based on FIG. 1) of a second crushing unit (150) by means of a discharge conveying unit (not specified in the drawing) provided in the freezing unit (140), and as the sludge (S) is discharged in the direction of gravity (from the upper side to the lower side based on FIG. 1) from the discharge conveying unit (124), the sludge (S) can be introduced into the second crushing unit (150) located on the lower side (based on FIG. 1).

[0122] Referring to FIG. 8, a processing body (151) according to one embodiment of the present invention may include a processing housing (152) and a second crushing body (153).

[0123] A processing housing (152) according to one embodiment of the present invention forms the exterior of a processing body (151) and may have a hollow interior. A second crushing body (153) may be installed inside the processing housing (152).

[0124] Referring to FIG. 8, a second crushing body (153) according to one embodiment of the present invention is installed inside a processing housing (152) and can come into contact with and impact sludge (S) flowing into the processing housing (152).

[0125] As the second crushing body (153) applies impact to the sludge (S), the sludge (S) passes through the second crushing section (150) and can be reduced to an appropriate size.

[0126] Referring to FIG. 8, a second crushing body (153) according to one embodiment of the present invention may be rotatably installed in a processing housing (152) by receiving power from an external source. The second crushing body (153) is rotatably positioned inside the processing housing (152) and comes into contact with the sludge (S), thereby having the effect of crushing the sludge (S).

[0127] In addition, as the sludge (S) falls from the freezing unit (140) in the direction of gravity (from the upper side to the lower side according to FIG. 8), it collides with the second crushing unit (150), specifically the second crushing body (153), and in addition to the impact from this collision, the sludge (S) can be effectively crushed due to the rotational force of the second crushing body (153).

[0128] Referring to FIG. 8, at least one second crushing body (153) according to one embodiment of the present invention may be provided. Specifically, a pair (153a, 153b) of the second crushing body (153) may be provided and arranged facing each other.

[0129] Referring to FIG. 8, a pair of second crushing bodies (153a, 153b) can be rotated in opposite directions while facing each other.

[0130] Specifically, the second crushing body (153a) positioned on one side (left side in Fig. 8) rotates clockwise (in Fig. 8) and the second crushing body (153b) positioned on the other side (right side in Fig. 8) rotates counterclockwise (in Fig. 8) so that they interlock with each other and move the sludge (S) flowing into the second crushing unit (150) in the direction of gravity (from the upper side to the lower side in Fig. 8), thereby interlocking with each other and allowing the sludge (S) flowing between the pair of second crushing bodies (153) to be effectively crushed.

[0131] According to one embodiment of the present invention, the second crushing body (153) may have at least one protrusion formed along its outer surface. By forming a protrusion along the outer surface of the second crushing body (153) according to one embodiment of the present invention, the size of the sludge (S) in contact with the second crushing body (153) can be reduced and crushed.

[0132] Referring to FIG. 8, a pair of second crushing bodies (153) according to one embodiment of the present invention are provided, but are not limited thereto and various modifications are possible, such as three or more being arranged side by side.

[0133] In accordance with one embodiment of the present invention, when sludge (S) moves from the freezing unit (140) to the second crushing unit (150), the sludge (S) is supplied along the direction of gravity (from the upper side to the lower side based on FIG. 6), thereby allowing the sludge treatment system (100) according to one embodiment of the present invention to be formed in a vertical structure, and compared to being formed in a horizontal structure, the area occupied by the sludge treatment system (100) can be reduced.

[0134] Referring to FIG. 6, a treatment transfer unit (155) according to one embodiment of the present invention transfers sludge (S) discharged from a treatment body (151), and can move the sludge (S) from the second crushing unit (150) to the drying unit (160) to be described later.

[0135] Referring to FIG. 6, a processing transfer unit (155) according to one embodiment of the present invention is positioned on the outside of a processing body (151) and can receive crushed sludge (S) from the processing body (151) and move the sludge (S) in a preset direction.

[0136] Referring to FIG. 6, the processing transfer unit (155) according to one embodiment of the present invention is formed in a conveyor belt manner, but various modifications are possible within the technical concept that sludge (S) is placed on the processing transfer unit (155) and the sludge (S) can be moved in a predetermined direction.

[0137] As an optional embodiment, the treatment transfer unit (155) may include at least one vibration module to facilitate dispersion of the sludge (S).

[0138] Referring to FIG. 6, the processing transfer unit (155) according to one embodiment of the present invention is formed in a horizontal direction, but is not limited thereto and can be formed at an angle pre-set with respect to the ground as in FIG. 7.

[0139] Referring to FIG. 7, the processing transfer unit (155) can be formed at an angle that is pre-set with respect to the ground, and specifically, can be formed at an upward slope.

[0140] Since the treatment transfer unit (155) that receives sludge (S) from the treatment main body (151) and transfers the sludge (S) is formed at an angle, the sludge (S) can be dropped in the direction of gravity (from the upper side to the lower side according to Fig. 8) from one end of the discharge side of the treatment transfer unit (155).

[0141] Referring to FIG. 1 and FIG. 7, there is an effect of supplying sludge (S) to another second crushing unit (150b), specifically a processing body (151b), which is positioned adjacent to one of the second crushing units (150a).

[0142] Referring to FIG. 1 and FIG. 7, a processing transfer unit (155) according to one embodiment of the present invention may be formed to be inclined upward at a preset angle from one end of the processing body (151) to the other end spaced apart from the processing body (151).

[0143] However, it is not limited to this, and various modifications are possible, such as the processing transfer unit (155) being formed to slope downward at a preset angle from one end of the processing body (151) to the other end spaced apart from the processing body (151).

[0144] According to one embodiment of the present invention, the processing and transfer unit (155) is formed at an angle that is pre-set with respect to the ground, so that a plurality of second crushing units (150) are not arranged in series in parallel on the same plane, but can be arranged vertically along the direction of gravity, and the second crushing units (150) can be arranged in a multi-layered structure, thereby having the effect of reducing the space occupied by the sludge treatment system (100).

[0145] As the sludge (S) moves through the treatment transfer unit (155) according to one embodiment of the present invention, the sludge (S) can have an overall higher uniformity through movement and can be evenly distributed, thereby improving the distribution.

[0146] Referring to FIG. 1 and FIG. 7, a plurality of second crushing units (150) according to one embodiment of the present invention may be provided. The plurality of second crushing units (150a, 150b) are spaced apart from each other, and the size of the sludge (S) may gradually decrease as it passes through each of the second crushing units (150a, 150b).

[0147] According to one embodiment of the present invention, a plurality of second crushing units (150) are provided, and sludge (S) can be crushed and ground by passing through each of the second crushing units (150a, 150b).

[0148] In order to crush the sludge (S) to different sizes, a plurality of second crushing sections (150a, 150b), specifically the treatment main body (151a, 151b), may be equipped with different second crushing members (not shown in the drawing).

[0149] Specifically, the size of the sludge (S) that is crushed through a plurality of second crushing sections (150a, 150b) can be gradually reduced. For example, in the second crushing section (150a) through which the sludge (S) flowing in from the freezing section (140) first passes, the sludge (S) can be crushed to a size of 20 mm to 33 mm.

[0150] The sludge crushed in the second crushing unit (150a), specifically the second crushing body (151a), reaches the next second crushing unit (150b) through the treatment transfer unit (155a). The sludge (S) that reaches the second crushing unit (150b) can be reduced to a size of 5mm through crushing treatment.

[0151] After the sludge (S) reduced to a size of 5 mm passes through the treatment transfer section (155b) and then the next second crushing section (not shown in the drawing), the size can be reduced to 5 mm or less.

[0152] However, it is not limited to this, and various modifications can be implemented within the technical concept in which the size of the sludge (S) can be gradually reduced by passing through a different second crushing section (150) and crushing it by providing different processing bodies (151).

[0153] According to one embodiment of the present invention, a plurality of second crushing units (150) are provided, and as sludge (S) passes through a plurality of second crushing units (150a, 150b) sequentially, the sludge (S), specifically solidified lumps, can be broken down and reduced in size and dispersed over a wide area.

[0154] In addition, the solidified sludge (S) that has undergone this crushing treatment can have a relatively increased surface area compared to before the crushing treatment, and the surface area in contact with air increases, making it easier to proceed with the drying process during drying, which has the effect of reducing the drying time.

[0155] In addition, it is possible to reduce not only the time for sludge (S) treatment but also the power consumption and costs.

[0156] Referring to FIG. 5, a transfer input unit (157) according to one embodiment of the present invention receives crushed sludge (S) from a processing transfer unit (155) and transfers it to a drying unit (160) to be described later, and can transfer the sludge (S) to the drying unit (160) by receiving power from an external source.

[0157] Although not shown in the drawing, the transfer input section (157) can transfer sludge (S) to the drying section (160) in a conveyor manner.

[0158] As an optional embodiment, the transfer input unit (157) can transfer sludge (S) to the drying unit (160) in a rotary manner.

[0159] According to one embodiment of the present invention, the transfer input unit (157) transfers the sludge (S) to the drying unit (160) in a rotating manner, thereby minimizing the dispersion of the sludge (S) in all directions due to the strong hot air (H) when it enters the drying unit (160) where hot air (H) is applied to the sludge (S).

[0160] Referring to FIG. 1 and FIG. 9, a drying unit (160) according to one embodiment of the present invention may be formed to perform drying treatment on sludge (S) after the second crushing unit (150) has performed crushing treatment.

[0161] As an optional embodiment, the drying unit (160) may be formed to perform heat treatment on the sludge (S). For example, the drying unit (160) may be formed to provide high-temperature hot air (H) to the sludge (S). A drying unit (160) according to one embodiment of the present invention may include a drying space in which the sludge (S) can be placed, and may be formed to provide hot air (H) to the drying space. The sludge (S) that has passed through the second crushing unit (150) passes through the drying space and can undergo drying treatment while coming into contact with high-temperature hot air (H) within the drying space.

[0162] As an optional embodiment, the sludge (S) can be effectively dried by applying electromagnetic waves to the sludge (S) through the drying unit (160) to break down the moisture in the sludge (S) into molecules and evaporate them using the electromagnetic wave vibration wavelength.

[0163] Referring to FIG. 1 and FIG. 9, a drying unit (160) according to one embodiment of the present invention may include a heat generating unit (161), a heat transfer unit (163), a dust collection unit (165), and a heat recovery unit (167).

[0164] Referring to FIG. 1 and FIG. 9, a heat generating unit (161) according to one embodiment of the present invention can generate heat to supply heat to sludge (S) using energy, and specifically can generate hot air (H).

[0165] As an optional embodiment, the heat generating unit (161) may include a heating material and a microwave electrodeless plasma heater.

[0166] Referring to FIG. 1 and FIG. 9, hot air (H) generated in the heat generation unit (161) through the heat transfer unit (163) according to one embodiment of the present invention reaches the sludge (S) located in the drying space, and drying treatment of the sludge (S) can proceed while in contact with the hot air (H).

[0167] Although not shown in the drawing, as an optional embodiment, it may further include a discharge section (not shown in the drawing) connected to a drying space and through which sludge (S) passing through the drying space is discharged, and the sludge (S) can be discharged to a receiving section (170) to be described later through the discharge section.

[0168] In one embodiment of the present invention, hot air (H) generated from a heat generating unit (161) is applied to a drying space through a heat transfer unit (163), and within the drying space, the hot air (H) can be diffused to the entire area of ​​the drying space by a hot air (H) diffusion module (not shown in the drawing).

[0169] Referring to FIG. 1, a heat generating unit (161) according to one embodiment of the present invention may include a blower unit (162), and hot air (H) may be generated by the wind generated from the blower unit (162), and the hot air (H) may be supplied to the sludge (S) through a heat transfer unit (163) to perform drying treatment.

[0170] A dust collection unit (165) according to one embodiment of the present invention is installed in a drying space and can be connected to a heat transfer unit (163). Sludge (S) that is dried by hot air (H) flowing through the heat transfer unit (163) can be introduced into the dust collection unit (165).

[0171] A dust collection unit (165) according to one embodiment of the present invention can collect sludge (S) using a dust collection method utilizing centrifugal force.

[0172] As an optional embodiment, the dust collector (165) may include a plurality of cyclone sections (not shown in the drawing). The plurality of cyclone sections may be formed to suck in sludge (S) of different sizes or different weights.

[0173] As a result, dried sludge (S) can be collected by suction through a dust collection unit (165), specifically a plurality of cyclone units, and the efficiency of sludge treatment can be improved by separately collecting sludge (S) that is small in size or has a small weight in the dust collection unit (165) and then treating sludge (S) of different sizes after drying, and it can be applied to various fields for recycling after drying sludge (S).

[0174] A heat recovery unit (167) according to one embodiment of the present invention may be connected to a dust collection unit (165) and may be installed on a path where hot air (H) flowing from the heat transfer unit (163) to the dust collection unit (165) is exhausted from the dust collection unit (165).

[0175] A heat recovery unit (167) according to one embodiment of the present invention can recover waste heat from the hot air (H) discharged from the dust collection unit (165) and transfer it back to the heat generation unit (161). The heat recovery unit (167) can flow the waste heat to the heat generation unit (161), specifically to the blower unit (162), and transfer it back to the heat transfer unit (163) by the blower unit (162).

[0176] According to one embodiment of the present invention, the heat recovery unit (167) recovers waste heat discharged from the dust collection unit (165) and transfers it to the heat transfer unit (163) through the heat generation unit (161), specifically the blower unit (162), thereby enabling the recycling of waste heat that could be discharged to the outside and reducing fuel costs.

[0177] Referring to FIG. 1, a receiving section (170) according to one embodiment of the present invention is formed to receive and discharge sludge (S) dried in a drying section (160) and to prepare for subsequent processing, disposal, or delivery.

[0178] A sludge treatment method using a sludge treatment system according to one embodiment of the present invention as described above will be explained.

[0179] FIG. 10 is a flowchart illustrating a sludge treatment method according to one embodiment of the present invention.

[0180] Referring to FIG. 10, a sludge treatment method according to one embodiment of the present invention may include a sludge preparation step (S10), a preliminary treatment step (S20), a freezing treatment step (S30), a crushing treatment step (S40), and a drying step (S50).

[0181] A sludge preparation step (S10) according to one embodiment of the present invention may include a step of preparing sludge (S). The sludge (S) may include treating sludge (S) containing moisture.

[0182] Sludge (S) can be formed in various ways and may include, for example, sludge (S) collected from a storage facility that stores sewage, wastewater or filth, or a treatment plant that processes them.

[0183] As an optional embodiment, the sludge preparation step (S10) may prepare sludge (S) containing a coagulating material. For example, such sludge (S) may contain a polymer as a coagulating material for coagulating the sludge (S).

[0184] As an optional example, the sludge (S) prepared in the sludge preparation step (S10) may have a moisture content value of 50 to 90%, for example 60 to 90%, or as a specific example, approximately 80% using such polymer flocculant.

[0185] As an optional embodiment, the sludge (S) prepared in the sludge preparation step (S10) may include a sludge (S) cake prepared in a certain size.

[0186] As an optional embodiment, the sludge (S) prepared in the sludge preparation step (S10) can be fed into the input hopper (110), can be crushed to a predetermined size by a crushing module provided in the input hopper (110), and can be formed to have a predetermined height or thickness by a flattening module.

[0187] Referring to FIG. 1, in the preliminary treatment step (S20), the sludge (S) prepared in the sludge preparation step (S10) passes through the input hopper (110) and is introduced into the preliminary treatment unit (120), and preliminary treatment is performed before freezing treatment in the freezing unit (140), so that physical treatment of the sludge (S) can be performed, and for example, stirring, evaporation, and crushing of the sludge (S) into which microorganisms, coagulants, etc. are introduced can be performed continuously and repeatedly.

[0188] As described above, in the preliminary processing step (S20), sludge (S) discharged from the input hopper (110) is transported along the transport direction (X-axis direction based on FIG. 2) on the transport section (124), and a plurality of first crushing sections (121) positioned on the outside of the transport section (124) can crush the sludge (S) by applying impact.

[0189] At the same time, by supplying hot air (H) to the sludge (S) being transported on the transport section (124) from the hot air supply section (125) which is formed extending parallel to the transport direction of the transport section (124), the sludge (S) is crushed and stirred by the first crushing section (121), and at the same time, the moisture contained in the sludge (S) can be rapidly evaporated and dried.

[0190] The preliminary treatment performed in the preliminary treatment step (S20) according to one embodiment of the present invention can be carried out using various devices that apply compressive force, shear force, tensile force, or frictional force to the sludge (S).

[0191] Referring to FIG. 1 and FIG. 10, a freezing treatment step (S30) according to one embodiment of the present invention is performed by carrying out a freezing treatment step for sludge (S) in a freezing unit (140), by receiving sludge (S) that has passed through a sludge preparation step (S10) and a preliminary treatment step (S20) and carrying out a freezing treatment so that at least one area of ​​the sludge (S) can be frozen and solidified.

[0192] A freezing treatment step (S30) according to one embodiment of the present invention can be performed using a refrigerator (141) that supplies or transmits cold air, and can perform freezing treatment on sludge (S) within a freezing treatment area (143).

[0193] Additionally, the freezing treatment step (S30) may include a movement step (not shown in the drawing) so that freezing treatment is performed in the freezing treatment area (143) and freezing treatment is performed while the sludge (S) moves to at least one area.

[0194] Additionally, the freezing treatment step (S30) may include a preliminary crushing step (S31), and crushing of the sludge (S) may be carried out at least before the freezing treatment is completed.

[0195] However, it is not limited to this, and various variations are possible, such as crushing the sludge (S) simultaneously with or immediately after freezing treatment in the freezing treatment area (143).

[0196] The freezing treatment step (S30) can be performed in an atmosphere of at least 0 degrees Celsius or lower so that freezing of the moisture within the sludge (S) can be carried out for freezing treatment of the sludge (S).

[0197] Referring to FIG. 1, before freezing of the moisture in the sludge (S) is carried out at 0 degrees Celsius or lower in the freezing treatment step (S30), the temperature of the freezing treatment space can first be formed to 15 degrees Celsius or lower using an air conditioning device, such as an air conditioner, in the pretreatment unit (130), specifically the first pretreatment body (131). The moisture in the sludge (S) can be discharged to the outside using this temperature difference.

[0198] In addition, a refrigerant can be introduced into the sludge (S) in the second pretreatment body (135) to lower the temperature of the sludge (S) to 0 degrees Celsius, and the moisture in the sludge (S) can be additionally discharged to the outside using this temperature difference.

[0199] As an optional embodiment, the freezing unit (140) may be formed to perform freezing treatment on the sludge (S) in an atmosphere of minus 10 to 20 degrees Celsius.

[0200] As an optional embodiment, the freezing unit (140) may be formed to perform freezing treatment on the sludge (S) in an atmosphere of minus 10 degrees to minus 40 degrees Celsius.

[0201] Specifically, the freezing treatment step (S30) can lower the temperature of the freezing space to minus 35 degrees Celsius or lower, and includes at least one pressurizing module (not shown in the drawing) that pressurizes the sludge (S) in contact, and can spread the height of the accumulated sludge (S) contained in the freezing space to a preset thickness, specifically 3 mm.

[0202] In the freezing treatment step (S30), the sludge (S) is spread out and undergoes a freezing treatment process to lower the temperature, thereby freezing the moisture present in the sludge (S) and discharging it to the outside.

[0203] As an optional embodiment, the freezing treatment step (S30) can be formed to rapidly perform freezing treatment on the sludge (S) in an atmosphere of minus 40 degrees or lower.

[0204] Referring to FIG. 10, the crushing treatment step (S40) according to one embodiment of the present invention may crush the sludge (S) after performing freezing treatment on the sludge (S) in the freezing treatment step (S30).

[0205] When freezing treatment is performed on the sludge (S) through the freezing treatment step (S40), at least one area, multiple areas, or the entire area of ​​the sludge (S) may be frozen and solidified, and the crushing treatment step (S40) may crush the solidified sludge (S) to form multiple lumps of appropriate size.

[0206] In the crushing process step (S40), the second crushing unit (150) can crush the sludge (S) by receiving it from the freezing unit (140) along the direction of gravity and applying impact to the sludge (S). As the second crushing unit (150) receives the sludge (S) from the freezing unit (140) along the direction of gravity, the impact force is increased by falling, and the sludge (S) can be effectively crushed by contact with the second crushing unit (150), specifically the second crushing body (153).

[0207] In addition, the freezing section (140) and the second crushing section (150) can be arranged along the direction of gravity, so that they can be arranged in a vertical structure or a multi-layered structure, and compared to being formed in a horizontal structure, the total area of ​​the sludge treatment system (100) can be reduced.

[0208] Referring to FIGS. 6, 7, and 10, in the crushing processing step (S40) according to one embodiment of the present invention, the second crushing unit (150) may include a processing body (151), a processing transfer unit (155), and a transfer input unit (157).

[0209] The processing body (151) may include a processing housing (152) and a second crushing body (153), and a pair of second crushing bodies (153a, 153b) may be rotatably arranged inside the processing housing (152), and sludge (S) flowing into the processing housing (152) along the direction of gravity may flow between the pair of second crushing bodies (153a, 153b) and come into contact with the second crushing bodies (153a, 153b) and be crushed.

[0210] The crushing treatment step (S40) according to one embodiment of the present invention can be carried out using various devices, for example, using a crushing roll.

[0211] As an optional embodiment, the crushing treatment step (S40) may include various steps of applying strong pressure to the sludge (S), for example, a step of using at least one hammer, and a step of applying pressure with a hammer on the stage after the sludge (S) is brought to correspond to the corresponding stage.

[0212] Referring to FIG. 1 and FIG. 10, the drying step (S50) according to one embodiment of the present invention may perform drying treatment on the sludge (S) after crushing in the crushing treatment step (S40).

[0213] As an optional embodiment, the drying step (S50) may perform heat treatment on the sludge (S). For example, the drying step (S50) may include the step of providing high-temperature hot air (H) to the sludge (S).

[0214] As an optional embodiment, the drying step (S50) may include the step of placing sludge (S) in a drying space and the step of providing hot air (H) to the drying space.

[0215] In the drying step (S50), a heat source is generated in the heat generating unit (161), and hot air (H) is generated by the blower unit (162) provided in the heat generating unit (161) and the hot air (H) can be flowed through the heat transfer unit (163).

[0216] Drying treatment can be carried out on the sludge (S) present in the drying space by this hot air (H).

[0217] The drying step (S50) may include a heat recovery step, and the waste heat discharged from the dust collection unit (165) where the sludge (S) that has undergone drying treatment is collected may be recovered and then flowed back to the heat generation unit (161).

[0218] As a result, the recovered waste heat can be flowed back to the heat transfer unit (163) by the blower unit (162), and drying treatment can be performed on the sludge (S) present in the drying area. Since the recovered waste heat is recycled back into hot air (H), there is an effect of reducing fuel costs.

[0219] A sludge treatment system (100) according to one embodiment of the present invention has the effect of rapidly reducing and evaporating the moisture contained inside the sludge (S) by simultaneously supplying hot air (H) to the sludge (S) being transported on the transport unit (124) from the pretreatment unit (120) by impacting and crushing the sludge (S) being transported on the transport unit (124) at the same time by supplying hot air (H) to the sludge (S) being transported on the transport unit (124) from the hot air supply unit (125) which is formed extending parallel to the transport direction of the transport unit (124).

[0220] In addition, since the hot air guide section (127) guides the movement path of the hot air, there is an effect of providing hot air (H) intensively to the sludge (S) being transported on the transport section (124) in a predetermined section of the hot air supply section (125).

[0221] In addition, the second crushing unit (150) receives sludge (S) along the direction of gravity from the freezing unit (140) and crushes the sludge (S) by applying impact to it, thereby having the effect of breaking and reducing the lumps of sludge (S) that have solidified in at least one area while passing through the freezing unit (140) and dispersing them over a wide area.

[0222] In addition, sludge (S) from the freezing unit (140) flows into the second crushing unit (150) along the direction of gravity, and flows into the second crushing unit (150), specifically between a pair of second crushing bodies (153) provided in the processing body (151), and the sludge (S) is impacted and effectively crushed.

[0223] In addition, a plurality of second crushing units (150) are provided, and the plurality of second crushing units (150) are spaced apart from each other and sequentially crush the sludge (S) to have the effect of gradually reducing the size of the sludge (S).

[0224] The solidified sludge (S) that has undergone this crushing process has an increased surface area, which increases the surface area in contact with air. Through this, the drying process can be easily carried out through the drying section (160), thereby reducing the drying time.

[0225] Through this, not only the time for sludge (S) treatment but also the power consumption and cost can be reduced.

[0226] As a result, there is an effect of obtaining a treated product with controlled moisture content in a form that is easy to handle by treating sludge (S) obtained from wastewater or sewage.

[0227] Sludge (S) that has been efficiently dried and processed through a sludge treatment system (100) according to one embodiment of the present invention can be easily used at construction sites and other necessary places.

[0228] In addition, after performing a process of crushing (or grinding) sewage sludge, livestock manure, food waste, etc. at least once in the pretreatment unit (120), pretreatment unit (130), and second crushing unit (150), a drying process is performed in the drying unit (160), thereby improving the efficiency of sludge utilization.

[0229] As such, the present invention has been described with reference to the embodiments illustrated in the drawings, but this is merely illustrative, and those skilled in the art will understand that various modifications and equivalent alternative embodiments are possible therefrom. Accordingly, the true technical scope of protection of the present invention should be determined by the technical spirit of the appended claims.

[0230] The specific practices described in the embodiments are examples and do not limit the scope of the embodiments in any way. Furthermore, unless specifically stated as "essential," "importantly," etc., a component may not be absolutely necessary for the application of the present invention.

[0231] In the specification of the embodiments (particularly in the claims), the use of the term "above" and similar descriptive terms may be in both singular and plural. Furthermore, where a range ("range") is described in the embodiments, it is considered to include the invention to which individual values ​​belonging to said range are applied (unless otherwise stated), and is equivalent to describing each individual value constituting said range in the detailed description.

[0232] Finally, regarding the steps constituting the method according to the embodiment, unless the order is explicitly stated or contradicted, the steps may be performed in a suitable order.

[0233] The embodiments are not necessarily limited according to the order of the steps described above. The use of all examples or exemplary terms (e.g., etc.) in the embodiments is merely for the purpose of describing the embodiments in detail, and the scope of the embodiments is not limited by such examples or exemplary terms unless limited by the claims. Furthermore, those skilled in the art will understand that various modifications, combinations, and changes may be configured according to design conditions and factors within the scope of the claims or equivalents to which they are added. Explanation of the symbols

[0234] 100: Sludge treatment system H: Hot air S: Sludge 110: Input hopper 120: Pre-processing unit 121: First crushing unit 122: Shaft section 123: First crushing main body 123ST: Crushing projection 124: Transfer section 125: Hot air supply unit 126: Hot air supply main body 126H: Discharge hole section 127: Hot air guide section 130: Preprocessing unit 131: First preprocessing main body 135; 2nd Pretreatment Main Body 140: Freezing Unit 141: Freezer 1 143: Freezing area (freezing space) 150, 150a, 150b: 2nd crushing section 151: Processing main body 152: Processing housing 153, 153a, 153b: Second crushing body 155: Processing / Transfer Section 157: Transfer Input Section 160: Drying section 161: Heat generating section 162: Blower unit 163: Heat transfer unit 165: Dust collector 167: Heat recovery unit 170: Reception Department

Claims

Claim 1 A system for treating sludge comprises: a pretreatment unit through which sludge introduced through an input hopper passes; wherein the pretreatment unit comprises: a conveying unit that conveys the sludge in a conveyor manner; a first crushing unit that crushes the sludge by applying impact to the sludge conveyed on the conveying unit; and a hot air supply unit disposed on the outside of the conveying unit and supplying hot air to the sludge moving on the conveying unit; wherein the pretreatment unit performs a preliminary treatment of the sludge before proceeding with a freezing treatment step for the sludge; wherein the conveying unit comprises: a plurality of conveying drive units rotatable about a preset central axis of rotation; and a conveying body on which the sludge is arranged surrounding the plurality of conveying drive units and which moves as the conveying drive units rotate; wherein the first crushing unit comprises a shaft unit disposed on the outside of the conveying unit and having a central axis of rotation formed parallel to the central axis of rotation of the conveying drive units. and includes a first crushing body that is fixedly positioned and connected to the shaft portion and has a plurality of crushing protrusions formed protruding outwardly; further includes a pretreatment portion through which sludge passing through the pretreatment portion passes and which reduces the temperature of the sludge; further includes a freezing portion formed to perform a freezing treatment step for the sludge; and a second crushing portion into which at least the sludge that has undergone the freezing treatment step is introduced from the freezing portion; the second crushing portion receives sludge along the direction of gravity from the freezing portion, applies impact to the sludge to crush the sludge, and further includes a drying portion that performs a drying treatment on at least the sludge processed in the second crushing portion; the second crushing portion includes a processing body into which impact is applied to the sludge introduced from the freezing portion; and a processing transfer portion that transfers the sludge discharged from the processing body; and the processing body comprises a processing housing having a hollow interior; and a second crushing body installed inside the processing housing and capable of contacting and impacting the sludge flowing into the processing housing;A sludge treatment system comprising: a second crushing unit having a plurality of units, wherein the sludge that has undergone the freezing treatment step gradually decreases in size as it passes through the plurality of second crushing units, wherein the freezing unit includes a freezer and a freezing treatment area, wherein the freezer is formed to provide a freezing atmosphere for the freezing treatment area, wherein the freezing treatment area includes a space capable of performing a freezing treatment step for the sludge, wherein the pretreatment unit performs a preliminary treatment of the sludge before performing a freezing treatment step through the freezing unit, and wherein the hot air supply unit comprises: a hot air supply main body having a discharge hole formed therein, receiving hot air from the outside and discharging hot air to the sludge being transported on the transport unit through the discharge hole; and a hot air guide part having a plurality of units and coupled to the hot air supply main body so as to be arranged facing each other with the discharge hole between them. Claim 2 delete Claim 3 delete Claim 4 delete Claim 5 delete Claim 6 delete Claim 7 delete Claim 8 delete Claim 9 delete Claim 10 A sludge treatment system according to claim 1, wherein the drying unit comprises a heat generating unit and a drying space, the heat generating unit is formed to provide heat to the drying space, and the drying space is formed to place the sludge and receive heat from the heat generating unit to proceed with drying treatment of the sludge. Claim 11 delete Claim 12 delete Claim 13 delete Claim 14 delete Claim 15 delete

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