Electric heat oil multi-stage horizontal disk and sludge dryer to whic the disk is applied

Abstract

The present invention relates to an electric heat transfer fluid multi-stage horizontal disc dryer, and more specifically, to a technology for an electric heat transfer fluid multi-stage horizontal disc dryer that can improve drying efficiency by increasing the contact area with livestock manure or sludge by allowing the heat transfer fluid to circulate widely through the discs used in the device for drying livestock manure or sludge. The present invention, as a technical means for solving the above problem, may be configured to include a disk body having a hollow interior, a plurality of blades provided on the outer circumferential side of the disk body, a heat transfer guide surface configured to divide the hollow portion of the disk body into inner and outer sides while having one side open, a first partition extending from the inner side of the disk body through the opening of the heat transfer guide surface to the center and coupled to the outer circumference of a shaft, a partition section comprising a second partition extending from the inner side of the heat transfer guide surface to the center and coupled between a heat transfer outflow hole and a heat transfer inflow hole formed on the outer circumference of the shaft, and a side plate configured in a plate shape corresponding to the hollow portion of the disk body, having a coupling hole formed in the center through which a shaft passes, and coupling such that the inner side faces the longitudinal ends of the heat transfer guide surface and the partition section while sealing both sides of the hollow portion of the disk body. A sludge dryer equipped with a multi-stage horizontal disk according to the present invention comprises a main body portion having a receiving space formed therein for receiving sludge, a shaft provided along the longitudinal direction in the receiving space, and a disk provided in the circumferential direction of the shaft, wherein the shaft is configured with a first flow path and a second flow path while the hollow interior is divided by a partition wall, and in the circumferential direction, a heat transfer outlet is formed in the first flow path divided by the partition wall and a heat transfer inlet is formed in the second flow path; and the disk comprises a disk main body having a hollow interior, a plurality of blades provided on the circumferential outer side of the disk main body, a heat transfer guide surface configured to divide the hollow portion of the disk main body into inner and outer sides while having one side open, a first partition extending from the inner side of the disk main body through the opening of the heat transfer guide surface to the center and coupled to the outer circumferential surface of the shaft, and a component formed on the outer circumferential surface of the shaft extending from the inner side of the heat transfer guide surface to the center. It may be configured to include a partition section consisting of a second partition connected between a heat flow outlet and a heat flow inlet, and a side plate configured in a plate shape corresponding to the hollow portion of the disk body, with a connecting hole formed in the center through which a shaft passes, thereby sealing both sides of the hollow portion of the disk body and connecting such that the inner surface faces the heat flow guide surface and both longitudinal ends of the partition section.

Description

Technology Field

[0001] The present invention relates to an electric heat transfer fluid multi-stage horizontal disc dryer, and more specifically, to a technology for an electric heat transfer fluid multi-stage horizontal disc dryer that can improve drying efficiency by increasing the contact area with livestock manure or sludge by allowing the heat transfer fluid to circulate widely through the discs used in the device for drying livestock manure or sludge. Background Technology

[0003] Sludge refers to a state in which solid particles are mixed with a large amount of moisture and exist in a mud-like condition. Examples of sludge include residue generated during sewage treatment or water purification processes, as well as livestock manure. If such sludge is discharged without treatment, it causes water and soil pollution. However, treating the sludge by evaporating the moisture reduces its volume and generates less odor, making storage and disposal easier. Furthermore, the dried sludge can be utilized as animal feed or compost, offering the advantage of recycling resources while preventing environmental pollution.

[0004] To dry large quantities of sludge in a short period, it must be heated to high temperatures, which requires a significant amount of energy. However, consuming large amounts of energy to treat sludge not only causes further environmental pollution but also leads to reduced economic efficiency. In particular, at a time when eco-friendly technologies for reducing greenhouse gases are crucial, using large amounts of energy to treat sludge runs counter to current trends; therefore, it is very important to design energy-efficient sludge drying devices.

[0006] Korean Patent No. 10-2631363 (hereinafter referred to as "prior art") can be cited as prior art regarding a sludge drying device. The prior art is a technology developed by the inventor of the present invention, and is a method of drying surrounding sludge by heating the shaft (210) and the vanes (241) provided on the outside of the shaft (210) while passing a heat transfer fluid through the interior of the shaft (210).

[0007] However, the above-described conventional technology has a structure in which the heat transfer fluid directly heats only the shaft (210), and the vane (241) is not directly heated by the heat transfer fluid but is indirectly heated by the heat transferred from the shaft (210). Therefore, the surrounding area adjacent to the shaft (210) is heated to a high temperature, but as it moves further away from the shaft (210), the temperature decreases, resulting in a problem of reduced drying efficiency.

[0008] The structure of the above-mentioned prior art not only has the problem of reduced drying efficiency, but also causes the sludge to harden as the temperature decreases as it moves further away from the shaft (210). When the sludge hardens, the stirring and flow of the sludge cannot be carried out smoothly, further reducing drying efficiency. Furthermore, after the drying process is completed, the sludge that has hardened and adhered to the wall of the trough section (150) must be crushed and removed by the operator, which reduces work efficiency and increases drying costs. Prior art literature

[0010] KR 10-2631363 B1 The problem to be solved

[0011] The present invention aims to solve the above-mentioned problems by providing an electric heat transfer fluid multi-stage horizontal disc dryer that can improve drying efficiency by providing a disc through which a heat transfer fluid can flow on a shaft, thereby expanding the range of direct heating by the heat transfer fluid by allowing the heat transfer fluid flowing through the shaft to be directly heated as it passes through the disc, and by drying the sludge while it comes into contact with the disc having a large surface area. means of solving the problem

[0013] The present invention, as a technical means for solving the above problem, may be configured to include a disk body having a hollow interior, a plurality of blades provided on the outer circumferential side of the disk body, a heat transfer guide surface configured to divide the hollow portion of the disk body into inner and outer sides while having one side open, a first partition extending from the inner side of the disk body through the opening of the heat transfer guide surface to the center and coupled to the outer circumference of a shaft, a partition section comprising a second partition extending from the inner side of the heat transfer guide surface to the center and coupled between a heat transfer outflow hole and a heat transfer inflow hole formed on the outer circumference of the shaft, and a side plate configured in a plate shape corresponding to the hollow portion of the disk body, having a coupling hole formed in the center through which a shaft passes, and coupling such that the inner side faces the longitudinal ends of the heat transfer guide surface and the partition section while sealing both sides of the hollow portion of the disk body.

[0014] In a preferred embodiment of the present invention, a plurality of connecting parts are provided along the circumferential direction on both sides in the longitudinal direction of the disk body, and both ends of the blade are connected to the connecting parts so as to be angle-adjustable, and the side plates can be connected so as to seal both sides of the hollow portion of the disk body.

[0015] In a preferred embodiment of the present invention, the side plate may further be provided with an auxiliary blade between the edge and the coupling hole.

[0016] In a preferred embodiment of the present invention, the disk body is configured in a cylindrical shape, and the heat transfer guide surface is configured in a cylindrical shape smaller than the inner surface of the disk body so that the outer surface of the heat transfer guide surface and the inner surface of the disk body are spaced apart at a uniform distance, and the disk body, the heat transfer guide surface, and both longitudinal sides of the partition part may be configured to face the side plate.

[0017] A sludge dryer equipped with a multi-stage horizontal disk according to the present invention comprises a main body portion having a receiving space formed therein for receiving sludge, a shaft provided along the longitudinal direction in the receiving space, and a disk provided in the circumferential direction of the shaft, wherein the shaft is configured with a first flow path and a second flow path while the hollow interior is divided by a partition wall, and in the circumferential direction, a heat transfer outlet is formed in the first flow path divided by the partition wall and a heat transfer inlet is formed in the second flow path; and the disk comprises a disk main body having a hollow interior, a plurality of blades provided on the circumferential outer side of the disk main body, a heat transfer guide surface configured to divide the hollow portion of the disk main body into inner and outer sides while having one side open, a first partition extending from the inner side of the disk main body through the opening of the heat transfer guide surface to the center and coupled to the outer circumferential surface of the shaft, and a component formed on the outer circumferential surface of the shaft extending from the inner side of the heat transfer guide surface to the center. It may be configured to include a partition section consisting of a second partition connected between a heat flow outlet and a heat flow inlet, and a side plate configured in a plate shape corresponding to the hollow portion of the disk body, with a connecting hole formed in the center through which a shaft passes, thereby sealing both sides of the hollow portion of the disk body and connecting such that the inner surface faces the heat flow guide surface and both longitudinal ends of the partition section.

[0018] In a preferred embodiment of the present invention, a plurality of disks may be provided along the longitudinal direction of the shaft. Effects of the invention

[0020] According to the electric heat transfer fluid multi-stage horizontal disc dryer of the present invention, the heat transfer fluid heats the shaft and the disc provided on the shaft together, and the sludge comes into contact with the disc with a large surface area, thereby having the advantage of improving energy efficiency and drying efficiency. In addition, according to the electric heat transfer fluid multi-stage horizontal disc dryer of the present invention, energy is saved, thereby enabling the realization of an eco-friendly and economical dryer. Brief explanation of the drawing

[0022] FIG. 1 is a drawing showing the side configuration of a sludge dryer equipped with an electric heat transfer fluid multi-stage horizontal disk according to the present invention. FIG. 2 is a drawing showing the combined structure of a multi-stage horizontal disk and a shaft (130) according to the present invention. FIG. 3 is an exploded perspective view of a multi-stage horizontal disk according to the present invention. FIG. 4 is a cross-sectional view showing the combined structure of a multi-stage horizontal disk and a shaft according to the present invention. Specific details for implementing the invention

[0023] Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings.

[0025] FIG. 1 is a side view of a sludge dryer equipped with an electric heat transfer fluid multi-stage horizontal disk according to the present invention, FIG. 2 is a diagram showing the combined structure of a multi-stage horizontal disk and a shaft according to the present invention, FIG. 3 is an exploded perspective view of a multi-stage horizontal disk according to the present invention, and FIG. 4 is a cross-sectional view showing the combined structure of a multi-stage horizontal disk and a shaft (130) according to the present invention.

[0026] FIG. 1 illustrates an embodiment (left) in which a plurality of disks (150) are provided on a shaft (130) at regular intervals and an embodiment (right) in which they are provided continuously. However, such illustration is provided to illustrate both embodiments together for the purpose of understanding the invention, and the coupling structure of the disks (150) can be provided in various ways as needed. This will be explained later.

[0027] Referring to FIGS. 1 to 4, a sludge dryer equipped with an electric heat transfer fluid multi-stage horizontal disk according to the present invention comprises a main body (110) having a receiving space (113) formed inside for receiving sludge, a shaft (130) provided along the longitudinal direction in the receiving space (113) of the main body (110), and a disk (150) provided in the circumferential direction of the shaft (130).

[0028] The sludge dryer equipped with an electric heat transfer fluid multi-stage horizontal disc according to the present invention was developed primarily for the purpose of treating livestock manure, but it can treat all sludge that conventional sludge dryers can treat in addition to livestock manure.

[0029] The main body (110) has a certain length and is configured such that its longitudinal cross-section is a semicircle, a U-shape, or a similar shape, and has a receiving space (113) inside. A cover part (120) is connected to the upper part in a way that allows it to be opened and closed, thereby enabling sludge drying operations to be performed while isolating the receiving space (113) from the outside. The main body (110) configured as described above is installed by means of a support frame (100) so that the receiving space (113) is horizontal.

[0030] A driving unit (105) for rotating a shaft (130) is provided on one side of the main body (110), and the driving unit (105) rotates the shaft (130) by being linked to one side of the shaft (130) which is provided to protrude from one side of the main body (110). A sludge inlet (125) is provided on the upper side of one side of the cover (120), and a sludge discharge port (115) is provided on the lower side of the other side of the main body (110). However, it is obvious that the positions of the sludge inlet (125) and the sludge discharge port (115) may be provided in opposite directions or at different locations depending on the rotation direction of the shaft (130) or the installation conditions of the main body (110). Also, although not shown in the drawing, a space through which a heat transfer fluid passes is formed on the inner side of the wall of the main body (110), and the heat transfer fluid may be configured to heat as it passes through the main body (110).

[0031] The main body (110) with the above configuration is a configuration generally applied to conventional sludge dryers. In addition to the above configuration, the main body (110) of the sludge dryer according to the present invention may be any configuration of a conventional sludge dryer as long as the disk (150) described later can be applied. A detailed description of the configuration of the main body (110) is omitted.

[0032] The shaft (130) is provided longitudinally along the receiving space (113) of the main body (110). Both ends of the shaft (130) protrude to both sides of the main body (110), and can be configured such that a driving unit (105) is connected to one side as previously described, and a pipe (not shown) for supplying heat transfer fluid is connected to the other side. The shaft (130) is configured with a hollow interior, and the hollow interior is divided by a partition wall (131), so that one side becomes a first flow path (133) through which heat transfer fluid is supplied, and the other side becomes a second flow path (137) through which the heat transfer fluid supplied to the first flow path (133) is discharged.

[0033] The shaft (130) can be configured in various known shapes as long as it is rotatable and has a structure to which a disk (150), which will be described later, can be coupled to the outside, but is preferably configured in a cylindrical shape.

[0034] In the shaft (130), a heat transfer fluid outlet (135) is formed in the first flow path (133) along the longitudinal direction, and a heat transfer fluid inlet (139) is formed in the second flow path (137). Although the heat transfer fluid inlet (139) and the heat transfer fluid outlet (135) do not necessarily have to be provided in the same location as shown in the drawing, they are configured to exist together in at least one pair within the internal space of the disk (150) to be described later. Accordingly, the heat transfer fluid inlet (139) and the heat transfer fluid outlet (135) are provided in pairs at the same or similar locations along the longitudinal direction of the shaft (130), and multiple such heat transfer fluid inlet (139) and heat transfer fluid outlet (135) are provided along the longitudinal direction of the shaft (130). The principle of operation in which the heat transfer fluid supplied to the shaft (130) flows along the shaft (130) and the heat transfer fluid outlet (135, 139) will be described later.

[0036] The disk (150) is composed of a disk body (160) having a hollow interior, a blade (170) provided on the outer circumferential side of the disk body (160), a heat guide surface (180) provided on the inner side of the hollow portion (165) of the disk body (160), a partition portion (190) separating the space through which heat oil passes between the heat guide surface (180) and the disk body (160), and side plates (200) provided on both sides of the disk body (160).

[0037] The disk body (160) can be configured in various known shapes as long as it is coupled to the shaft (130) and can rotate within the receiving space (113) of the main body part (110). However, since the most efficient and desirable shape of the rotating body is the cylindrical shape shown in the drawing, the cylindrical shape shown in the drawing will be described as an example below.

[0038] A plurality of connecting parts are provided along the circumferential direction of the disk body (160) to which the blade (170) is connected. The connecting parts may have various shapes and types depending on the method in which the blade (170) is connected, and the configuration in which the blade (170) is connected to the connecting parts will be described later.

[0040] A plurality of blades (170) are provided along the circumferential direction on the outer side of the disk body (160). The blades (170) are provided so that when the disk body (160) rotates in one direction, the surrounding sludge can be moved to the other side. That is, as shown in the drawing, if the blades (170) that are vertically coupled to the outer surface of the disk body (160) are configured in a tilted shape as they go from one side to the other, the blades (170) will rotate and push the surrounding sludge from one side to the other.

[0041] The blade (170) can be connected to a connecting part provided in the circumferential direction of the disk body (160) so as to allow for angle adjustment. In the drawing, a structure is illustrated in which a plurality of elongated holes (165) are formed along the circumferential direction on both sides in the longitudinal direction of the disk body (160), and both ends of the blade (170) are connected to the elongated holes (165). The connecting structure illustrated in the drawing has the advantage that the angle can be adjusted while the ends of the blade (170) move partially along the elongated holes (165). However, the above connecting structure represents one embodiment of the present invention, and the method of connecting the blade (170) and the disk body (160) and the connecting structure can be configured in various ways as needed.

[0042] For example, the coupling structure using the elongated hole (165) has the advantage of allowing the angle of the blade (170) to be varied flexibly and easy to replace, but sludge can flow toward the shaft (130) through the elongated hole (165). A sludge dryer equipped with a disk (150) according to the present invention may have a plurality of disks (150) spaced apart at a certain interval on the shaft (130) (left coupling structure in FIG. 1) or may have the disks (150) continuously without gaps (right coupling structure in FIG. 1). When the disks (150) are spaced apart at a certain interval, there is no problem even if sludge flows through the elongated hole (165), but when the disks (150) are continuously spaced apart so that the sludge flows only from the outside of the disks (150), a coupling structure such as the elongated hole (165) may not be desirable.

[0043] Accordingly, the blade (170) may be permanently fixed to the outer side of the disk body (160) by means such as welding as needed, or a connecting member such as a bolt may be provided to protrude from the outer surface of the disk body (160) and fixed to the connecting member. Additionally, the blade (170) may be configured to be equal to or shorter than the longitudinal width of the disk body (160), or it may be formed to be longer than the width of the disk body (160) and have a structure that protrudes to both sides of the disk body (160).

[0045] The heat guide surface (180) is configured to divide the hollow portion (163) of the disk body (160) into inner and outer sides, with one side open. The heat guide surface (180) divides the hollow portion (163) of the disk body (160) into inner and outer sides, forming a path for the heat transfer fluid to flow from the inner side to the outer side or vice versa. Therefore, in order to facilitate the flow of the heat transfer fluid, it is preferable for the heat guide surface (180) to be spaced at a uniform distance from the inner side of the disk body (160). When the disk body (160) is configured as a cylinder as shown in the drawing, the heat guide surface (180) is configured as a cylinder spaced at a uniform distance from the inner side of the disk body (160), with one side cut along the longitudinal direction, so that the overall shape is formed as a C-shape or a similar shape.

[0047] The partition section (190) is composed of a first partition (193) that extends from the inner side of the disk body (160) toward the center, passes through the opening of the heat guide surface (180), and is coupled to the outer surface of the shaft (130) located at the center, and a second partition (195) that extends from the inner side of the heat guide surface (180) toward the center and is coupled to the outer surface of the shaft (130).

[0048] As described above, the shaft (130) has a cylindrical hollow interior that is divided by a partition (131), with one side becoming a first flow path (133) and the other side becoming a second flow path (137). A heat transfer outlet (135) is formed in the first flow path (133), and a heat transfer inlet (139) is formed in the second flow path (137). At this time, it is preferable that the heat transfer inlet (139) and the heat transfer outlet (135) be positioned so as to be offset toward one side of the partition (131) to extend the movement path of the heat transfer so that the disk body (160) can be heated uniformly. In the above configuration, the opening of the heat transfer guide surface (180) is positioned opposite the heat transfer inlet (139) and the heat transfer outlet (135), and the space is separated, supported, and fixed by a partition (190).

[0049] The first partition (193) connects the inner surface of the disk body (160) and the shaft (130) at a position corresponding to the other side of the partition wall (131), thereby separating the space on the other side of the shaft (130) into left and right by the first partition (193). The second partition (195) connects the inner surface of the heat guide surface (180) and the shaft (130) at a position corresponding to the one side of the partition wall (131), thereby separating the inner space of the heat guide surface (180) into left and right by the second partition (195). Since the heat transfer inlet (139) and the heat transfer outlet (135) are respectively provided in the first flow path (133) and the second flow path (137) such that they are offset toward one side of the shaft (130), when the second partition (195) is connected to a position corresponding to the partition wall (131), the structure is such that the second partition (195) is coupled between the heat transfer inlet (139) and the heat transfer outlet (135), and the heat transfer guide surface (180) is spaced apart from the inner surface of the disk body (160), and the inner space is separated left and right by the second partition (195).

[0050] In the drawing, for ease of understanding, the partition section (190) is shown as being directly connected to the shaft (130), but if necessary, a cylindrical connecting ring (not shown) that penetrates and hermetically connects to the shaft (130) between the first partition (193) and the second partition (195) may be provided and connected to the shaft (130) by the connecting ring. In this structure, the parts corresponding to the heat transfer outlet (135) and the heat transfer inlet (139) must be cut so that the heat transfer outlet / inlet (135, 139) are exposed to the hollow section (163).

[0052] The side plate (200) is configured with a shape corresponding to the hollow portion (163) of the disk body (160), and a coupling hole (205) through which a shaft (130) passes is formed in the center, so that the side plate (200) is coupled to both sides of the disk body (160) to seal both sides of the hollow portion (163). When the disk body (160) is configured in a cylindrical shape, the side plate (200) is configured in a disc shape with a coupling hole (205) formed in the center.

[0053] At this time, as described above, if elongated holes (165) are formed on both longitudinal edges of the disk body (160), the side plate (200) is coupled to the inside of the elongated holes (165) so that the inside of the hollow part is completely sealed. Thus, the internal heat transfer fluid is not leaked out to the outside, and external sludge is not introduced into the inside of the disk body (160).

[0054] The heat guide surface (180) and the partition section (190) are also joined so that their longitudinal ends face the side plate (200) to ensure airtightness, so that the inner side of the disk body (160) is partitioned into a cross-sectional structure shape formed by the partition section (190) and the heat guide surface (180), and is supported and fixed by the side plate (200).

[0055] An auxiliary blade (210) for pushing surrounding sludge outward may be further provided on the outer side of the side plate (200). The auxiliary blade (210) is provided in a form that protrudes vertically between the edge of the side plate (200) and the coupling hole (205) provided in the center, and preferably, as shown in the drawing, it may be configured in a Taegeuk shape or a similar shape. However, it goes without saying that the shape or number of auxiliary blades (210) can be varied within the range that allows them to push surrounding sludge outward. Below, the description will be based on the auxiliary blade (210) of the shape shown in the drawing.

[0056] The height or method of joining of the auxiliary blade (210) can be configured in various ways depending on the method of use of the disk (150). The sludge dryer according to the present invention is provided with a plurality of disks (150) along the longitudinal direction of the shaft (130), and the plurality of disks (150) may be provided continuously without gaps or may be provided in a form spaced apart at a certain interval. At this time, if the auxiliary blade (210) provided on the side plate (200) is provided in a form that protrudes outward from the side of the disk (150), it is difficult to join the plurality of disks (150) continuously without gaps or join them at a narrow interval; therefore, as shown in the drawing, it is preferable to provide the auxiliary blade (210) at the same or lower than the edges on both sides of the disk body (160).

[0057] However, when multiple discs (150) are provided with sufficient spacing between them, it is easier to push the sludge outward by making the auxiliary blade (210) protrude outwardly along the longitudinal outer surface of the disc body (160). Therefore, the edge of the disc body (160) may be made equal to or higher than the auxiliary blade (210) as shown in the drawing, but if necessary, the auxiliary blade (210) may be configured to protrude outwardly along the longitudinal side of the disc body (160).

[0059] When examining the operation of a sludge dryer equipped with an electric heat transfer fluid multi-stage horizontal disk according to the present invention in the structure as described above, first, heat transfer fluid supplied from the outside flows into the first flow path (133) of the shaft (130). A heat transfer fluid outlet (135) is formed along the longitudinal direction in the first flow path (133), and the heat transfer fluid outlet (135) is provided at a position that communicates with the hollow portion (163) inside the disk (150). Accordingly, the heat transfer fluid moving along the first flow path (133) flows into the hollow portion (163) of the disk body (160) along the heat transfer fluid outlet (135).

[0060] The heat transfer fluid that flows into the hollow portion (163) of the disk body (160) through the heat transfer outlet (135) flows into one side of the partition portion (190) and the inner side of the heat transfer guide surface (180), and then flows outward through the opening of the heat transfer guide surface (180). After that, it flows to the opposite side of the partition portion (190) through the passage between the outer surface of the heat transfer guide surface (180) and the inner surface of the disk body (160), and then flows again from the other side of the partition portion (190) to the inner side of the heat transfer guide surface (180) and then flows into the second flow path (137) through the heat transfer fluid inlet (139). The heat transfer fluid that flows into the second flow path (137) exits to the outside, is reheated, and then flows back into the first flow path (133) to repeat the above process.

[0061] The electric heat transfer fluid multi-stage horizontal disc dryer according to the present invention has a higher drying efficiency and energy efficiency because the contact area of ​​the heat transfer fluid with the disc body (160) is widened and the contact time is extended. In the sludge dryer according to the prior art, a blade (170) is provided on the outer side of the shaft (130), and since the heat transfer fluid flowing along the shaft (130) cannot come into direct contact with the blade (170), there was a problem of reduced heat transfer efficiency. If the flow of the heat transfer fluid is slow (the contact time is extended), the heat transfer efficiency may be partially increased, but there is a problem of a large temperature difference between one side of the shaft (130) and the other side. If the flow of the heat transfer fluid is fast (the contact time is short), the temperature difference along the length of the shaft (130) is reduced, but the heat of the heat transfer fluid is not sufficiently transferred to the blade (170) and escapes to the outside. Therefore, there was a problem of reduced energy efficiency and drying efficiency.

[0062] However, the sludge dryer equipped with a multi-stage horizontal disc of electric heat transfer fluid according to the present invention has high heat transfer efficiency because the heat transfer fluid comes into even contact with the disc (150) of a sufficiently large area, and as a result, energy efficiency and drying efficiency are increased.

[0064] As such, while specific embodiments have been described in the detailed description of the present invention, it is understood that various modifications are possible within the scope of the invention. Therefore, the scope of the present invention should not be limited to the described embodiments, but should be defined by the claims set forth below as well as equivalents thereof. Explanation of the symbols

[0066] 100: Support frame 105: Drive unit 110: Main body 113: Storage space 115: Sludge discharge port 120: Cover section 125: Sludge inlet 130: Shaft 131: Bulkhead 133: 1st Euro 135: Fruit Outflow Hole 137: Second Euro 139: Fruit inlet 150: Disk 160: Disc body 163: Hollow part 165: Long Ball 170: Blade 180: Fruit guide surface 190: Partition section 193: Partition 1 195: Partition 2 200: Side plate 205: Connecting hole 210: Auxiliary Blade

Claims

Claim 1 A multi-stage horizontal disk comprising: a disk body having a hollow interior; a plurality of blades provided on the outer circumferential side of the disk body; a heat guide surface configured to separate the hollow portion of the disk body into inner and outer sides while having one side open; a partition section comprising a first partition extending from the inner side of the disk body through the opening of the heat guide surface to the center and coupled to the outer surface of a shaft; a second partition extending from the inner side of the heat guide surface to the center and coupled between a heat outlet hole and a heat inlet hole formed on the outer surface of the shaft; and a side plate configured in a plate shape corresponding to the hollow portion of the disk body, having a coupling hole formed in the center through which a shaft passes, and coupled such that the inner side faces the longitudinal ends of the heat guide surface and the partition section while sealing both sides of the hollow portion of the disk body. Claim 2 A multi-stage horizontal disk according to claim 1, wherein a plurality of connecting parts are provided along the circumferential direction on both sides in the longitudinal direction of the disk body, and both ends of the blade are connected to the connecting parts so as to be angle-adjustable, and the side plates are connected so as to seal both sides of the hollow portion of the disk body. Claim 3 A multi-stage horizontal disk according to claim 1, wherein the side plate further has an auxiliary blade between the edge and the coupling hole. Claim 4 A multi-stage horizontal disk according to claim 1, wherein the disk body is configured in a cylindrical shape, and the heat transfer guide surface is configured in a cylindrical shape smaller than the inner surface of the disk body so that the outer surface of the heat transfer guide surface and the inner surface of the disk body are spaced apart at a uniform interval, and the disk body, the heat transfer guide surface, and both longitudinal sides of the partition part are configured to face the side plate. Claim 5 A sludge dryer equipped with an electric heat transfer fluid multi-stage horizontal disk, comprising a main body portion having a receiving space formed on the inner side for receiving sludge, a shaft provided along the longitudinal direction of the receiving space, and a disk provided in the circumferential direction of the shaft, wherein the shaft is composed of a first flow path and a second flow path with a hollow interior divided by a partition wall, and in the circumferential direction, a heat transfer fluid outlet is formed in the first flow path divided by the partition wall and a heat transfer fluid inlet is formed in the second flow path; and the disk is a partition portion comprising a disk main body having a hollow interior, a plurality of blades provided on the outer circumferential side of the disk main body, a heat transfer fluid guide surface configured to divide the hollow portion of the disk main body into inner and outer sides with one side open, a first partition extending from the inner side of the disk main body through the opening of the heat transfer fluid guide surface to the center and coupled to the outer circumferential surface of the shaft, and a second partition extending from the inner side of the heat transfer fluid guide surface to the center and coupled between the heat transfer fluid outlet and heat transfer fluid inlet holes formed on the outer circumferential surface of the shaft. A sludge dryer equipped with a multi-stage horizontal disk comprising a side plate configured in a plate shape corresponding to the hollow portion of the disk body, having a coupling hole formed in the center through which a shaft passes, and which seals both sides of the hollow portion of the disk body while coupling such that the inner surface faces both ends in the longitudinal direction of the heat guide surface and the partition portion. Claim 6 In claim 5, the sludge dryer is equipped with a plurality of multi-stage horizontal discs provided along the longitudinal direction of the shaft.

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