KR102427900B1 - High-speed sludge drying apparatus - Google Patents

Abstract

The present invention relates to a high-speed drying device, and more particularly, it is possible to dry a large amount of organic waste (sludge) within a short time by using centrifugal force in a vacuum state, so that drying efficiency can be improved as well as generated in the drying process. It relates to a high-speed drying device for preventing environmental pollution by deodorizing and purifying exhaust gas containing fine dust and odors.

Description

High-speed sludge drying apparatus

The present invention relates to a high-speed drying device, and more particularly, it is possible to dry a large amount of organic waste (sludge) within a short time by using centrifugal force in a vacuum state, so that drying efficiency can be improved as well as generated in the drying process. It relates to a high-speed drying device for preventing environmental pollution by deodorizing and purifying exhaust gas containing fine dust and odors.

Recently, interest in the treatment of water-containing wastes (hereinafter referred to as 'sludge') among various wastes generated in various fields is increasing, and these sludges are wastewater sludge, food or paper produced in wastewater treatment facilities. There are high-humidity wastes from industrial sites such as factories, food waste from households, and livestock manure from livestock farms.

Since such sludge usually contains up to 80% of moisture, it is not subject to treatment by general incineration facilities, and treatment through landfill is general.

However, in the treatment of sludge through landfill, problems such as secondary contamination of groundwater caused by leachate, weakening of the ground, and securing of landfill area are emerging, and alternative technologies are required.

Therefore, as a way to solve the above problems, many technologies for sludge treatment have been developed and patented. A plurality of installed drying cylinders are arranged adjacently, and the drying object injected into the top drying cylinder is continuously transferred from the top to the bottom, discharged through the bottom drying cylinder, and injected into the bottom drying cylinder. A sludge drying device is proposed in which hot air is exhausted through a drying cylinder at the top so that the hot air is continuously transferred from the bottom to the top.

And the "moisture drying method using infrared rays and high frequency" of Republic of Korea Patent Publication No. 10-0407828 installs a conveyor belt rotatably in a drying container, and installs a magnet in the upper part of the inlet side of the conveyor belt to insert sludge or food waste To remove metallic foreign substances contained in the conveyor belt, the positive and negative plates of the high-frequency device are installed on the upper part of the conveyor belt to apply high-temperature heat to the sludge or food waste. A sludge drying method is proposed by installing an infrared drying furnace installed at the outlet side and irradiating infrared rays to the outlet side so that the sludge or food waste passes through.

In addition, the "food waste and livestock drying apparatus" of Korean Patent Application Laid-Open No. 2003-0079397 has a plurality of spaces in the shape of a tape wound, a rotary blade having a protruding jaw for rotating the food waste in the space, and a second fixing device. A sludge drying apparatus is proposed, which is fixed to a frame and consists of a heating plate having a hole in the center and one side, and a heater device fixed to the first fixed frame and formed of a bracket supporting a near-infrared lamp that emits radiant heat.

As described above, the techniques proposed for treating sludge in a conventional drying method propose an apparatus and method for carrying out a drying process using various types of heat sources while transporting the sludge using a conveyor belt or a screw.

However, such prior art has low thermal efficiency, high cost for drying sludge, takes a lot of time compared to incineration treatment method, and insufficient measures against dust or noise generated during sludge treatment.

In addition, the conventional sludge drying method and apparatus have low thermal efficiency and low practicality. In particular, when the screw method is applied, it is almost impossible to transport the sludge, and there is a problem that the sludge that is located inside and transported is hardly dried.

In other words, the sludge drying device that normally applies the screw method expects the action of transporting the sludge while pulverizing it through the screw, but virtually no pulverization action is expected, and the surface of the transferred sludge is dried, but the sludge inside is not dried. As a result, there is a problem that the screw is overloaded.

The present invention is to solve the above problems, and an object of the present invention is to heat the sludge supplied into the drying unit in a vacuum state while continuously circulating the sludge along the inner circumferential surface of the drying unit by the impellers and blade members arranged in multiple stages. It is an object of the present invention to provide a high-speed drying apparatus capable of drying quickly and efficiently.

In addition, the present invention provides a high-speed drying device capable of preventing environmental pollution by removing fine dust and bad odors contained in exhaust gas generated during the drying process by a cyclone dust collecting unit composed of a first collecting unit and a second collecting unit. Its purpose is to provide

Another object of the present invention is to provide a high-speed drying apparatus capable of improving drying efficiency by removing sludge deposited on the inner circumferential surface of a drying unit by a scraper formed at an end of a blade member.

The problems to be solved by the present invention are not limited to the problems mentioned above, and other problems not mentioned will be clearly understood by those skilled in the art from the following description.

In order to solve the above problems, in the high-speed drying apparatus according to the present invention, a first screw 110 for supplying sludge is formed, and a cutter for granulating the sludge at the discharge port according to the traveling direction of the first screw ( 120) is mounted supply unit 100; a cylindrical drying unit 200 connected to the discharge port of the supply unit and configured to dry the sludge supplied therein in a vacuum state; a discharge unit 300 connected to a lower side of the drying unit and provided with a second screw 310 for discharging the dried object; and an exhaust pipe 410 connected to the upper end of the drying unit to transport the exhaust gas, and a cyclone dust collecting unit 400 for purifying harmful substances contained in the exhaust gas transferred from the exhaust pipe. but with

The cyclone dust collecting unit is connected to the upper end of the drying unit, the exhaust pipe 410 to which the exhaust gas is transferred; a first collecting unit 440 for primarily purifying harmful substances contained in the exhaust gas transferred from the exhaust pipe; and a second collecting unit 450 for secondary purification of the exhaust gas transferred from the first collecting unit.

At this time, the cyclone dust collecting unit further includes a heat exchange unit 430 inside the upper end, and the heat exchange unit is provided with a cooling unit 420 for continuously supplying cooling water, and a cooling water supply pipe 421 sequentially at the lower part of the exhaust pipe. ) and a cooling water return pipe 422 are formed to supply and recover cooling water from the cooling unit.

In addition, the first collecting part 440 is provided with a first discharge pipe 441 at the upper end, and the foreign substances contained in the exhaust gas transferred from the exhaust pipe through the swirling flow inside the first collecting part are removed. It is characterized in that the gas is primarily discharged.

In addition, the second collecting unit 450 is provided with a second discharge pipe 451 at the upper end, and the second collecting unit removes foreign substances such as fine dust contained in the exhaust gas primarily purified by the first collecting unit. It is characterized in that it is discharged.

At this time, the cyclone dust collecting part is characterized in that a discharge part 460 is formed at the lower end to discharge foreign substances filtered from the first and second collecting parts.

In addition, the cyclone dust collecting unit is characterized in that it further comprises a purification unit 470 for removing the odor contained in the exhaust gas.

As described above, the present invention allows the sludge supplied to the inside of the drying unit in a vacuum state to be heated while continuously circulating along the inner circumferential surface of the drying unit by the impellers and blade members arranged in multiple stages, so that the sludge can be dried quickly and efficiently. It works.

In addition, the present invention has the advantage of improving the drying efficiency by enabling the scraper formed on the end of the blade member to remove the sludge deposited on the inner peripheral surface of the drying unit.

In addition, the present invention has an effect of preventing environmental pollution by removing fine dust and odors contained in exhaust gas generated during the drying process by the cyclone dust collecting unit.

Effects of the present invention are not limited to the effects mentioned above, and other effects not mentioned will be clearly understood by those skilled in the art from the following description.

1 is a schematic illustration of a high-speed drying apparatus according to a preferred embodiment of the present invention;
2 to 3 are exemplary views showing an embodiment of a drying unit according to a preferred embodiment of the present invention;
4 is an exemplary view of an impeller according to a preferred embodiment of the present invention;
5 is a schematic illustration of a scraper according to a preferred embodiment of the present invention;
6 is a schematic illustration of a cyclone dust collecting unit according to a preferred embodiment of the present invention.
7 is an exemplary view showing a first collecting unit and a second collecting unit according to a preferred embodiment of the present invention.

Since the present invention can have various changes and can have various embodiments, specific embodiments are illustrated in the drawings and described in detail.

However, this is not intended to limit the present invention to specific embodiments, and should be understood to include all modifications, equivalents and substitutes included in the spirit and scope of the present invention. In describing each figure, like reference numerals have been used for like elements.

When a component is referred to as being “connected” or “connected” to another component, it may be directly connected or connected to the other component, but it is understood that other components may exist in between. it should be On the other hand, when it is said that a certain element is "directly connected" or "directly connected" to another element, it should be understood that the other element does not exist in the middle.

The terms used in the present application are only used to describe specific embodiments, and are not intended to limit the present invention. The singular expression includes the plural expression unless the context clearly dictates otherwise. In the present application, terms such as “comprise” or “have” are intended to designate that a feature, number, step, operation, component, part, or combination thereof described in the specification exists, but one or more other features It is to be understood that this does not preclude the possibility of the presence or addition of numbers, steps, operations, components, parts, or combinations thereof.

Hereinafter, preferred embodiments of the present invention will be described in more detail with reference to the accompanying drawings. Hereinafter, the same reference numerals are used for the same components in the drawings, and repeated descriptions of the same components are omitted.

Hereinafter, embodiments of the present invention will be described with reference to the accompanying drawings. Like reference numerals in each figure indicate like elements. In describing the present invention, detailed descriptions of related well-known functions or configurations are omitted so as not to obscure the gist of the present invention.

1 is a schematic illustration of a high-speed drying apparatus according to a preferred embodiment of the present invention, FIGS. 2 to 3 are exemplary views showing an embodiment of a drying unit according to a preferred embodiment of the present invention, and FIG. 4 is a preferred embodiment of the present invention An exemplary view of an impeller according to an embodiment, FIG. 5 is a schematic illustration of a scraper according to a preferred embodiment of the present invention, and FIG. 6 is a schematic exemplary view of a cyclone dust collecting unit according to a preferred embodiment of the present invention.

1 to 6 , the high-speed drying apparatus according to the preferred embodiment of the present invention is largely composed of a supply unit 100 , a drying unit 200 , a discharge unit 300 , and a cyclone dust collecting unit 400 . .

At this time, the supply unit is configured with a first screw 110 for supplying the sludge, and a cutter 120 for granulating the sludge at the outlet along the traveling direction of the first screw.

Here, the first screw is driven by the first deceleration motor 140, and preferably, it can be controlled to supply a fixed amount of sludge.

In addition, the cutter serves to form a blade in a direction opposite to the rotational direction of the first screw to granulate the sludge to a predetermined size or less.

In addition, the supply unit may further include a preheating unit 130 for preheating the sludge, and this preheating unit enables the drying unit to more easily perform a drying process.

Meanwhile, the drying unit is connected to the discharge port of the supply unit and has a cylindrical shape for drying the sludge supplied therein in a vacuum state.

Accordingly, the drying unit may be preferably provided with a separate vacuum former for maintaining the inside in a vacuum state, so that more efficient drying can be performed.

In addition, the drying unit is provided with a heating means 250 that receives a heat source for heating the inside, it is characterized in that the internal temperature of the drying unit heated by the heating means is 110 ° C to 200 ° C, preferably 155 Maximum drying efficiency can be performed at ℃ to 165 ℃.

In this case, the drying unit includes a driving motor 210; a rotating shaft 220 installed in a vertical direction in the inner center of the drying unit so as to be rotatable in conjunction with the driving motor; an impeller 230 arranged in multiple stages to be spaced apart from the rotating shaft by a predetermined interval to raise and agitate the sludge; and a gas outlet 240 connected to the exhaust pipe to discharge the exhaust gas inside the drying unit at the upper end.

Here, the driving motor transmits a driving force to the rotating shaft to rotate it.

In addition, the impeller is spaced apart by a predetermined interval along the longitudinal direction (vertical direction) of the rotation shaft and arranged in multiple stages to rotate together according to the driving of the rotation shaft.

In addition, the gas outlet is a member connected to an exhaust pipe to be described later, so that heated air generated by heating the sludge inside the drying unit, that is, exhaust gas is discharged.

On the other hand, the discharge unit is connected to a lower side of the drying unit, and a second screw 310 for discharging the dried object is installed.

At this time, the second screw is driven by the first deceleration motor 140, preferably to control the discharge rate and discharge speed of the dried sludge discharged after drying.

In addition, the discharge unit may be preferably provided with a collection tank 330 for storing the dried sludge.

On the other hand, the cyclone dust collecting unit is connected to the upper end of the drying unit to form an exhaust pipe 410 through which the exhaust gas is transferred, and is configured to purify harmful substances contained in the exhaust gas transferred from the exhaust pipe.

The basic configuration of such a cyclone dust collecting unit is a well-known technology. It forms a descending swirl flow by applying a swirling motion to the air introduced inside, and removes foreign substances such as fine dust contained in the air out of the swirl flow by centrifugal force. It is driven by the principle that it collides with the inside of the dust collector and falls down to collect the dust.

At this time, as shown in FIG. 6 , the cyclone dust collecting unit further includes a heat exchange unit 430 inside the upper end.

In this case, the cyclone dust collecting unit may be provided with a separate cooling unit 420 for continuously supplying cooling water to the heat exchange unit, and preferably a cooling water supply pipe 421 and cooling water sequentially disposed under the exhaust pipe. A recovery tube 422 is formed.

That is, since the exhaust gas transferred from the exhaust pipe maintains a high temperature, heat exchange is performed by the cooling water supplied to the heat exchange unit, and the exhaust gas whose temperature is lowered thereby has the advantage of easy dust collection, deodorization and purification.

In this case, the cyclone dust collecting unit is preferably composed of a first collecting unit 440 and a second collecting unit 450 .

Accordingly, the first collecting unit discharges the exhaust gas from which a relatively large foreign material contained in the exhaust gas is removed to the first discharge pipe 441 through an internal swirl flow.

In addition, the cyclone dust collecting unit may further include a second collecting unit 450 for filtering out foreign substances such as fine dust having a relatively small size under the first collecting unit.

At this time, the second collecting unit removes foreign substances such as fine dust contained in the exhaust gas that has passed through the first collecting unit through an internal swirling flow like the first collecting unit, and then the exhaust gas is discharged through the second discharge pipe 451 . to be discharged as

In addition, the first discharge pipe and the second discharge pipe are preferably such that the exhaust gas is transported by a separate suction fan (unsigned), but a re-supply pipe connected to the second collecting part so that foreign substances can be completely removed. (442) to be recollected.

At this time, the first discharge pipe and the second discharge pipe are connected to a separate purification unit 470 to remove odors included in the exhaust gas, and then to be exhausted to the outside.

In addition, the cyclone dust collecting part is provided with a discharge part 460 on one side of the lower end so as to discharge foreign substances filtered by the swirling flow.

On the other hand, as shown in FIGS. 4 to 5, the drying unit according to a preferred embodiment of the present invention will be described in more detail,

The impeller includes an inner ring 231 axially coupled to the rotation shaft; a plurality of spoke members 232 radially formed outside the inner ring; an outer ring 233 to which an outer end of the spoke member is connected; and a blade member 234 repeatedly formed at regular intervals on the outer circumferential surface of the outer ring.

The impeller is coupled to the rotating shaft to rotate within the drying unit, and is configured by welding a common metal material or fastening it using a bolt or nut.

Such an impeller causes the sludge supplied to the inside of the drying unit to be continuously circulated and heated while rotating and rising along the inner circumferential surface by centrifugal force.

At this time, the blade member is a support frame 235 that protrudes from the outer peripheral surface of the outer ring; and a scraper 236 formed by being bent at one end of the support frame and having an outer surface curved to correspond to an inner circumferential surface of the drying unit.

In this case, the scraper is formed to be inclined upward toward the end surface from the portion connected to the support frame, and the end surface is formed to be inclined upward from the outside direction to the inner direction based on the flat cross-section.

Such a scraper makes it possible to reduce the time required for drying by allowing the sludge inside the drying unit to rotate more efficiently, thereby improving drying efficiency.

In addition, the scraper is characterized in that the groove portion 237 is formed on the outer peripheral surface in contact with the inner wall of the drying unit.

The scraper serves to remove the sludge deposited on the inner circumferential surface (inner wall) of the drying unit while the sludge is dried by the groove and transport the dried sludge to the lower direction of the drying unit.

As described above, the present invention allows the sludge supplied to the inside of the drying unit in a vacuum state to be heated while continuously circulating along the inner circumferential surface of the drying unit by the impellers and blade members arranged in multiple stages, so that the sludge can be dried quickly and efficiently. It works.

In addition, the present invention has the advantage of improving the drying efficiency by enabling the scraper formed on the end of the blade member to remove the sludge deposited on the inner peripheral surface of the drying unit.

In addition, the present invention has an effect of preventing environmental pollution by removing fine dust and odors contained in exhaust gas generated during the drying process by the cyclone dust collecting unit.

Effects of the present invention are not limited to the effects mentioned above, and other effects not mentioned will be clearly understood by those skilled in the art from the following description.

Best embodiments have been disclosed in the drawings and specification. Here, although specific terms have been used, these are used only for the purpose of describing the present invention and are not used to limit the meaning or scope of the present invention described in the claims. Therefore, it will be understood by those skilled in the art that various modifications and equivalent other embodiments are possible therefrom. Accordingly, the true technical protection scope of the present invention should be defined by the technical spirit of the appended claims.

100 ... supply 110 ... first screw
120 ... cutter 130 ... preheating part
140 ... first reduction motor
200 ... dryer 210 ... drive motor
220 ... shaft of rotation 230 ... impeller
231 ... inner ring 232 ... spoke member
233 ... outer ring 234 ... blade member
235 ... support frame 236 ... scraper
237 ... groove 240 ... gas outlet
250 ... heating means
300 ... discharge 310 ... collection tank
320 ... second reduction motor
400 ... Cyclone dust collection unit 410 ... Exhaust pipe
420 ... cooling part 421 ... cooling water supply pipe
422 ... cooling water return pipe 430 ... heat exchange part
440 ... first collection unit 441 ... first discharge pipe
442 ... air re-supply pipe 450 ... second collection unit
451 ... second discharge pipe 460 ... discharge part
470 ... purifier

Claims (6)

a supply unit 100 in which a first screw 110 for supplying sludge is formed, and a cutter 120 for granulating the sludge is mounted at an outlet along the traveling direction of the first screw;
a cylindrical drying unit 200 connected to the discharge port of the supply unit and configured to dry the sludge supplied therein in a vacuum state;
a discharge unit 300 connected to a lower side of the drying unit and provided with a second screw 310 for discharging the dried object; and
An exhaust pipe 410 connected to the upper end of the drying unit to transport exhaust gas is formed, and a cyclone dust collecting unit 400 for purifying harmful substances contained in the exhaust gas transferred from the exhaust pipe; characterized in that it consists of but,
The cyclone dust collecting unit,
an exhaust pipe 410 connected to the upper end of the drying unit through which exhaust gas is transported;
a first collecting unit 440 for primarily purifying harmful substances contained in the exhaust gas transferred from the exhaust pipe; and
Further comprising a second collecting unit 450 for secondary purification treatment of the exhaust gas transferred from the first collecting unit,
The drying unit 200,
a driving motor 210 and
a rotating shaft 220 installed in the vertical direction in the center of the interior of the drying unit so as to be rotatable in conjunction with the driving motor;
and an impeller 230 arranged in multiple stages to be spaced apart from the rotating shaft by a predetermined interval to raise and agitate the sludge,
The impeller is
It is spaced apart by a predetermined interval along the vertical direction, which is the longitudinal direction of the rotation shaft, and is arranged in multiple stages so as to rotate simultaneously according to the driving of the rotation shaft,
The impeller is
an inner ring 231 axially coupled to the rotation shaft;
A plurality of spoke members 232 radially formed on the outside of the inner ring,
an outer ring 233 to which the outer end of the spoke member is connected; and
It includes a blade member 234 repeatedly formed at regular intervals on the outer peripheral surface of the outer ring,
The blade member,
A support frame 235 that protrudes from the outer circumferential surface of the outer ring, and
It is formed by bending one end of the support frame, and includes a scraper 236 whose outer surface is curved to correspond to the inner peripheral surface of the drying unit,
The scraper is
It is formed to be inclined upward toward the end surface from the part connected to the support frame, and the end surface is formed to be inclined upward from the outside to the inward direction based on the flat cross-section,
The scraper is
A groove portion 237 is formed on the outer peripheral surface in contact with the inner wall of the drying unit,
The scraper removes the sludge deposited on the inner wall, which is the inner circumferential surface of the drying unit in the process of drying the sludge by the groove portion 237, and transports the dried sludge in the lower direction of the drying unit. .
According to claim 1, wherein the cyclone dust collecting unit further comprises a heat exchange unit 430 inside the upper end,
The heat exchange unit,
A cooling unit 420 for continuously supplying cooling water is installed, and a cooling water supply pipe 421 and a cooling water return pipe 422 are sequentially formed under the exhaust pipe to supply and recover cooling water from the cooling unit. Characterized by a high-speed drying device.
The method of claim 2, wherein the first collecting unit (440),
A first discharge pipe 441 is provided at the upper end portion to primarily discharge the exhaust gas from which foreign substances contained in the exhaust gas transferred from the exhaust pipe are removed through the swirling flow inside the first collecting part. A high-speed drying device with
According to claim 3, wherein the second collecting unit (450),
High-speed drying, characterized in that a second discharge pipe 451 is provided at the upper end to secondaryly remove foreign substances such as fine dust contained in the exhaust gas firstly purified from the first collecting unit and discharge it. Device.
According to claim 4, The cyclone dust collecting unit,
A high-speed drying apparatus, characterized in that a discharge part (460) is formed at the lower end to discharge foreign substances filtered from the first and second collection parts.
According to claim 1, wherein the cyclone dust collecting unit,
High-speed drying apparatus, characterized in that it further comprises a purification unit (470) for removing the odor contained in the exhaust gas.

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