KR101934764B1 - High-speed sludge drying apparatus - Google Patents

Abstract

SUMMARY OF THE INVENTION An object of the present invention is to provide a sludge high-speed drying apparatus which induces high-temperature, inert hot wind with low oxygen concentration by inducing high-temperature combustion gas to high-pressure air using a Coanda nozzle, thereby achieving effective sludge drying. Another object of the present invention is to provide a sludge high-speed drying apparatus which maximizes the efficiency of the apparatus by burning the dried sludge powder to obtain combustion gas, thereby obtaining a dry heat source and removing odor.

Description

[0001] The present invention relates to a high-speed sludge drying apparatus,

The present invention relates to a sludge fast drying apparatus.

Generally, a sediment formed in a sewage treatment or purification process is called a sludge. Sewage sludge can be classified into sewage sludge, industrial sludge, and sludge sludge. Sewage sludge usually contains about 50% organic material and has a high water content of about 70 to 85% . Traditionally, sludge has been stabilized by anaerobic treatment and then disposed of by dewatering and drying. However, as the amount of sludge to be treated increases, direct mechanical dehydration, incineration, wet oxidation and heat treatment methods are also studied have. Although the final treatment methods such as landfill, recycling, and combustion may vary widely in most sludge treatments, basically dewatering and drying to remove water contained in the sludge is an essential part of the sludge treatment process.

A conventional sludge drying apparatus basically includes a structure for evaporating water by supplying hot air for drying to a container for accommodating sludge or a method for evaporating moisture by indirect heat exchange between rotating disks or a method for evaporating water by supplying near infrared rays or microwaves And then heated and dried. However, in order to generate high temperature hot air, it is necessary to use a large amount of fuel, and it also causes a fire in a dried sludge having a heating value due to high temperature hot wind. There is also a problem that sludge adheres to the wall of the dryer during long-term operation. In addition, in the case of conventional sludge drying apparatus, a large amount of odor generated due to evaporation of organic matter contaminates the environment, and is recognized as a dislike facility, which is a social cause that makes it difficult to install a sludge drying apparatus. Therefore, various improvement studies have been made to solve these problems.

Korean Patent Laid-Open Publication No. 2001-0000285 ("hot air blow type drying type dryer and drying system ", 2001.01.05, hereinafter referred to as prior art) is also a technique disclosed as a part of such studies. In the prior art, And the sludge introduced into the dryer is blown upwards while being dried by hot hot air. According to the dryer of the prior art, it is possible to prevent accumulation of less dried sludge in the drier and to shorten the time for residence of the sludge. However, the amount of sludge that can be treated in the dryer according to the prior art is limited to the extent that the sludge is dried and blown by the hot air blown from the nozzle, and thus is not suitable for treating a large amount of sludge at high speed. Also, countermeasures against the odor generated by the sludge treatment are not effective.

1. Korean Patent Laid-Open Publication No. 2001-0000285 ("hot air blow type shredder type drier and drying system ", 2001.01.05)

SUMMARY OF THE INVENTION The present invention has been made in order to solve the problems of the prior art as described above, and it is an object of the present invention to provide a drying apparatus for rotating a high temperature inert hot air by mixing high temperature combustion gas with high pressure air using a Coanda nozzle The present invention provides a safe sludge drying apparatus which prevents sludge from generating a fire by using an inactive hot air having a low oxygen concentration while supplying effective sludge to a sludge formed with a thin film. Another object of the present invention is to provide a sludge high-speed drying apparatus which maximizes the efficiency of the apparatus by burning the dried sludge powder to obtain combustion gas, thereby obtaining a dry heat source and removing odor.

According to an aspect of the present invention, there is provided a sludge fast drying apparatus comprising: a sludge supply unit for receiving and supplying sludge; A combustion chamber (120) for combusting fuel for combustion to generate combustion gas; The sludge is supplied from the sludge supply unit 110 and supplied through the hot air supply path 125 from the combustion chamber 120. The sludge is rotated to form a thin film and dried with a combustion gas to obtain dried sludge powder A rotary drying unit 130 for making a mixture of malodorous gases; The mixture of the dry sludge powder and the malodorous gas is supplied from the rotary drying unit 130 to the powder discharge path 145 to separate the solid sludge powder into a lower portion and separate the upper portion of the gas- A collecting and separating unit 140 for discharging the collected particles; The rotary drying unit 130 spreads the sludge injected into the rotary drying unit 130 in the form of a thin film on the inner wall surface by the centrifugal force due to rotation and supplies the sludge to the rotary drying unit 130 And the smell-containing gas discharged from the collecting and separating unit 140 is supplied to the combustion chamber 120 and is burned to be removed, and the collecting and separating unit 140 May be supplied to the combustion chamber 120 and used as a fuel for combustion.

At this time, the sludge fast drying apparatus 100 is in the form of a coanda nozzle, in which the working gas is drawn by the additional gas supplied to the inside and discharges the mixed gas of the additional gas and the working gas, A hot air supply nozzle 125N provided on the hot air supply nozzle; Wherein the working gas in the hot air supply nozzle 125N is a combustion gas supplied from the combustion chamber 120 and the additional gas in the hot air supply nozzle 125N is a compressed air supplied from the outside .

In addition, the sludge-high-speed drying apparatus 100 is of a Coanda nozzle type in which the working gas is drawn by the additional gas supplied to the inside and discharges the mixed gas of the additional gas and the working gas. A powder-laden nozzle 145N provided on the nozzle; Wherein the working gas in the powder-driven nozzle (145N) is a mixture of dry sludge powder and malodorous gas discharged from the rotary drying unit (130), and the addition The gas may be compressed air supplied from the outside.

The rotary drying unit 130 includes a hot air supply chamber 131 formed in a container shape having an opened upper surface and connected to the hot air supply path 125 at one side to receive a combustion gas. The upper end of the hot air supply chamber 131 is connected to the upper end of the hot air supply chamber 131. The upper end of the hot air supply chamber 131 is made of a porous material so that the wall can pass through the gas. A rotary drying chamber 132 connected to and rotated by a rotary shaft 132a rotated by the rotary shaft 132M; A sludge supply path 133 for injecting sludge supplied from the sludge supply unit 110 into the rotary drying chamber 132; The powder discharge path 145 is connected to one side of the hot air supply chamber 131 and the rotary drying chamber 132 so that the sludge is dried in the rotary drying chamber 132 An outer tube 134 for discharging a mixture of the generated dried sludge powder and the malodorous gas; The sludge introduced into the rotary drying chamber 132 is spread in the form of a thin film on the wall surface of the rotary drying chamber 132 by rotation and the hot air supply chamber 131 and the rotary drying chamber 132, The sludge can be made into a mixture of the dry sludge powder and the malodorous gas by drying the sludge spread in the form of a thin film through the wall surface of the rotary drying chamber 132.

The rotary drying unit 130 is formed of a mesh material and is connected to the sludge inlet path 133 and is disposed inside the rotary drying chamber 132, And a scraping mesh 135 for scraping off the thin film.

The rotary drying unit 130 includes a crushing blade 136 disposed below the rotary drying chamber 132 for crushing accumulated sludge accumulated under the rotary drying chamber 132; As shown in FIG.

A plurality of the spin drying units 130 are distributed on the outer cylinder 134 so that a mixture of the dried sludge powder and the malodorous gas produced in the rotary drying chamber 132 flows into the powder discharge path 145, A flow generating nozzle 137 for generating a gas flow so as to be attracted to the nozzle; As shown in FIG.

In addition, the sludge inlet path 133 may extend in the vertical direction to inject the sludge into the rotary drying chamber 132, and may extend in a downward direction.

The rotating and drying unit 130 may be provided with a carbon packing at a connection portion between the upper end of the hot air supply chamber 131 and the upper end of the rotary drying chamber 132.

The powder separator 140 is connected to the powder discharging passage 145 at one end thereof to receive a mixture of the dry sludge powder and the malodorous gas to separate and collect the solid powder, A cyclone 141 for separating and discharging gas upward; A malodor discharge passage 142 connected to the upper portion of the cyclone 141 to discharge the malodorous gas; A powder receiving portion 143 connected to the lower portion of the cyclone 141 to collect the dried sludge powder; . ≪ / RTI >

The sludge drying apparatus 100 further includes a gas discharge path 125a provided on the hot air supply path 125 to discharge a part of the combustion gas. As shown in FIG.

The method for drying a sludge at a high speed according to the present invention comprises the steps of: receiving sludge in a sludge supply unit (110); The combustion fuel is combusted in the combustion chamber 120 to generate a combustion gas; The sludge and the combustion gas are supplied to the rotary drying unit 130 and the rotary drying unit 130 is dried with the combustion gas while rotating the sludge to make a mixture of the dry sludge powder and the malodorous gas; The mixture of the dry sludge powder and the malodorous gas is supplied to the collecting and separating section 140, and the collecting and separating section 140 separates the dry sludge powder and the malodorous gas; The malodorous gas separated from the collecting and separating unit 140 is supplied to the combustion chamber 120 and burned and removed; The dried sludge powder collected in the collecting and separating unit 140 is supplied to the combustion chamber 120 and used as combustion fuel; . ≪ / RTI >

At this time, the sludge fast drying apparatus 100 is in the form of a coanda nozzle, in which the working gas is drawn by the additional gas supplied to the inside and discharges the mixed gas of the additional gas and the working gas, A hot air supply nozzle 125N provided on the hot air supply nozzle; Wherein the working gas in the hot air supply nozzle 125N is a combustion gas supplied from the combustion chamber 120 and the additional gas in the hot air supply nozzle 125N is compressed air supplied from the outside In the high-speed sludge drying method, hot air, which is a mixed gas of combustion gas and compressed air, is supplied to the rotary drying unit 130 through the hot air supply nozzle 125N to perform sludge drying.

Also, at this time, the high-speed sludge drying method may be such that hot air of a mixed gas of a combustion gas and compressed air is formed with an oxygen concentration within a range of 3% to 16%, and a temperature within a range of 100 to 600 degrees centigrade .

The high-speed sludge drying apparatus 100 may include a hot air supply chamber 131 formed in a container shape having an opened upper surface and connected to the hot air supply path 125 at one side to receive combustion gas. The upper end of the hot air supply chamber 131 is connected to the upper end of the hot air supply chamber 131. The upper end of the hot air supply chamber 131 is made of a porous material so that the wall can pass through the gas. A rotary drying chamber 132 connected to and rotated by a rotary shaft 132a rotated by the rotary shaft 132M; Wherein the high-speed sludge drying method further comprises: injecting sludge into the rotary drying chamber 132; The sludge injected into the rotary drying chamber 132 is spread in the form of a thin film on the wall of the rotary drying chamber 132 by rotation; Drying the sludge spreading in the form of a thin film through the wall of the rotary drying chamber (132) by the combustion gas supplied to the space between the hot air supply chamber (131) and the rotary drying chamber (132); The sludge being made of a mixture of dry sludge powder and malodorous gas; . ≪ / RTI >

According to the present invention, first, by supplying high-temperature inert hot air having low oxygen concentration to the rotary drying apparatus by introducing high-temperature combustion gas into high-pressure air using a Coanda nozzle, It is effective. More specifically, by using a Coanda nozzle, a hot air for drying having a low oxygen concentration, in which combustion gas and air are properly mixed, is supplied, thereby reducing the risk of fire occurrence. In addition, since the drying air for drying is supplied as described above in the state where the sludge supplied to the bottom surface of the rotating drying chamber forms a thin film, drying can be performed at a very high speed.

According to the present invention, the drying sludge powder is burned to obtain a combustion gas, thereby obtaining a dry heat source and removing odors, thereby maximizing the efficiency of the apparatus.

BRIEF DESCRIPTION OF THE DRAWINGS Fig. 1 is an embodiment of a sludge high-speed drying apparatus of the present invention.
2 is a partial detailed configuration of the sludge fast drying apparatus of the present invention.

BEST MODE FOR CARRYING OUT THE INVENTION Hereinafter, a sludge drying apparatus according to the present invention will be described in detail with reference to the accompanying drawings.

Fig. 1 shows an embodiment of the sludge fast drying apparatus of the present invention. The sludge fast drying apparatus 100 of the present invention may include a sludge supply unit 110, a combustion chamber 120, a rotary drying unit 130, and a collecting / separating unit 140. Each part will be described in more detail as follows.

The sludge supply unit 110 serves to receive and supply sludge, and the combustion chamber 120 generates combustion gas by burning combustion fuel. The combustion fuel to be combusted in the combustion chamber 120 may be liquid or gaseous fuel at the beginning of operation of the apparatus. Further, the combustion gas generated in the combustion chamber 120 is generally at a very high temperature of about 850 DEG C or more.

The rotary drying unit 130 receives the sludge from the sludge supply unit 110 and receives the combustion gas from the combustion chamber 120 through the hot air supply path 125 and dries the sludge with the combustion gas while rotating the sludge It acts as a mixture of dry sludge powder and odor-containing gas. That is, the sludge is dried in the rotary drying unit 130, which is the center device of the sludge drying apparatus 100. The detailed construction of the rotary drying unit 130 will be described later in more detail.

The collection and separation unit 140 receives the mixture of the dried sludge powder and the malodorous gas from the rotary drying unit 130 through the powder discharge path 145 and separates and collects the solid sludge powder And separates and discharges the gas containing malodorous gas to the upper part. That is, in the collecting and separating unit 130, the sludge is dried to separate powders, that is, solid substances, and vapor substances such as water vapor and odor containing odors, which are separated from the powders. As a result, .

As a more specific example of the collecting and separating unit 140, the collecting and separating unit 140 is connected to the powder discharging path 145 on one side of the upper end thereof to receive a mixture of the dried sludge powder and the malodorous gas, And a cyclone (141) for separating the sludge powder and collecting the sludge powder downward, and separating and discharging the offensive odor-containing gas to the upper part. A cyclone is a typical device that separates a fluid and a particle by generating a swirling flow in a fluid and applying a centrifugal force to the particle in the fluid. The dust collecting and separating unit 140 further includes an odor discharge passage 142 connected to the upper portion of the cyclone 141 to discharge the malodorous gas and a powder receiving portion 142 connected to the lower portion of the cyclone 141 to collect the dried sludge powder, (143).

The sludge fast drying method using the sludge fast drying apparatus 100 according to the present invention will be briefly described below. First, the sludge is supplied to the sludge supply unit 110, and the combustion fuel is combusted in the combustion chamber 120 to generate a combustion gas. Next, the sludge and combustion gas are supplied to the rotary drying unit 130, and the rotary drying unit 130 is dried with the combustion gas while rotating the sludge to make a mixture of the dry sludge powder and the malodorous gas. Next, a mixture of the dry sludge powder and the malodorous gas is supplied to the collecting and separating part 140, and the collecting and separating part 140 separates the dry sludge powder and the malodorous gas. At this time, in the conventional sludge drying apparatus, the process is completed at this stage. However, in the sludge drying apparatus 100 of the present invention, the circulation process is advanced to improve the performance and efficiency of the apparatus.

First, in the sludge drying apparatus 100 of the present invention, as shown in FIG. 1, the malodorous gas separated from the collecting / separating unit 140 is supplied to the combustion chamber 120. When steam and air containing odor are supplied to the combustion chamber 120, the odor is removed by being oxidized by the high temperature combustion heat in the combustion chamber 120. As described above, the sludge drying apparatus 100 of the present invention has a great advantage that the odor generated in the sludge drying process can be completely removed from the apparatus without being discharged out of the apparatus. This has a great effect in that the conventional sludge drying unit facility is recognized as an abominable facility, and the problem of difficult installation of the facility due to the inverse of the local residents can be solved.

Also, in the sludge drying apparatus 100 of the present invention, as shown in FIG. 1, the dried sludge powder collected by the collecting / separating unit 140 is supplied to the combustion chamber 120. As described above, the combustion chamber 120 generates combustion gas by burning liquid or gaseous fuel at the beginning of operation. However, when continuously burning the separate fuel, the fuel is consumed too much, and the energy consumption of the entire apparatus is considerably increased. However, in the present invention, the dried sludge powder collected in the collecting and separating unit 140 is supplied to the combustion chamber 120 to be used as combustion fuel. As it is well known, sludge generally contains more than 50% of organic materials, and is not in short supply to be used as combustion fuel. Actually, such dried sludge is already used as mixed fuel of power plant. Thus, dry sludge powder (made by drying the sludge) is very suitable for use as a fuel (for generating combustion gases for sludge drying). As the dry sludge powder is used as a fuel for combustion, it is eventually recycled. Further, since the dry sludge powder is used as a fuel for combustion, it is possible to use less fuel for generating combustion gas. That is, by reusing the dried sludge powder as the fuel for combustion, it is possible to greatly reduce the fuel consumption for the combustion, and ultimately, the energy consumption efficiency of the entire apparatus can be greatly improved.

Further, in the present invention, the conditions such as the temperature and the oxygen concentration of the hot air supplied to the rotary drying unit 130 are further optimized, thereby improving the performance and stability of the apparatus at once. More specifically, the sludge drying apparatus 100 is in the form of a coanda nozzle, in which the working gas is drawn by the additional gas supplied to the inside and discharges the mixed gas of the additional gas and the working gas, And a hot air supply nozzle 125N provided on the furnace 125. At this time, the working gas in the hot air supply nozzle 125N is a combustion gas supplied from the combustion chamber 120, and the additional gas in the hot air supply nozzle 125N is compressed air supplied from the outside.

When the hot air supply nozzle 125N is not provided, the combustion gas generated in the combustion chamber 120 is supplied to the rotary drying unit 130 as it is. However, as described above, the combustion gas produced in the combustion chamber is generally at a very high temperature of more than 850 degrees Celsius. Therefore, when the high-temperature combustion gas is supplied as it is, there is a problem that the ignition may occur during the drying of the sludge, and further, the risk of fire occurrence during the operation of the apparatus is greatly increased.

However, in the present invention, compressed air is mixed with the combustion gas by supplying the hot air supply nozzle 125N to the rotary drying unit 130. In this way, the hot air, which is a mixed gas of the combustion gas and the compressed air, is supplied to the rotary drying unit 130 through the hot air supply nozzle 125N and the sludge is dried. As described above, if the temperature and oxygen concentration of the hot air for drying are excessively high, there is a risk that ignition occurs during drying of the sludge. In the present invention, however, the risk of ignition is greatly alleviated by appropriately lowering the temperature of the hot air for drying by mixing the compressed gas with the combustion gas. On the other hand, since the combustion gas itself has a very low oxygen concentration, an inert hot air having a low oxygen concentration can be produced even when mixed with humidified compressed air. That is, the drying hot air produced by mixing the combustion gas and the compressed air can smoothly perform the sludge drying, but the risk of fire can be greatly reduced.

More specifically, in the present invention, the hot air of the mixed gas of the combustion gas and the compressed air is optimized by forming the oxygen concentration within the range of 3% to 16% and forming the temperature within the range of 100 to 600 degrees Celsius . In order to adjust the oxygen concentration and the temperature as described above, the mixing ratio of the combustion gas and the compressed air may be adjusted. As a method of controlling the mixing ratio of the combustion gas and the compressed air, the amount of the compressed air supplied to the hot air supply nozzle 125N may be adjusted most simply. Alternatively, as shown in FIG. 1, the gas discharge passage 125a may be provided on the hot air supply passage 125 to discharge a part of the combustion gas through the gas discharge passage 125a, thereby adjusting the amount of the combustion gas It is possible.

On the other hand, the hot air supply nozzle 125N in the form of a coanda nozzle increases the flow rate by further supplying a considerable amount of compressed air. The sludge fast drying apparatus 100 is provided with a structure for effectively discharging the increased flow rate It is preferable to further include the above. More specifically, the sludge-high-speed drying apparatus 100 is configured in the form of a Coanda nozzle, in which the working gas is drawn by the additional gas supplied to the inside and discharges the mixed gas of the additional gas and the working gas, And a powder-laden nozzle 145N provided on the furnace 145. At this time, the working gas in the powder-laden nozzle 145N is a mixture of the dry sludge powder discharged from the rotary drying unit 130 and the malodorous gas, and the additional gas in the powder-laden nozzle 145N is supplied from the outside .

The mixture of the dry sludge powder and the malodorous gas discharged through the powder discharge path 145 by the powder-laden nozzle 145N can flow more smoothly. As a result, the sludge- The sludge treatment efficiency of the sludge can be further improved.

Hereinafter, the rotary drying unit 130, which is the center apparatus of the sludge drying apparatus 100 of the present invention, will be described. FIG. 2 shows a detailed construction of the sludge high-speed drying apparatus according to the present invention, and the structure of the rotary drying unit 130 is more specifically shown. 2, the rotary drying unit 130 may include a hot air supply chamber 131, a rotary drying chamber 132, a sludge inlet path 133, and an outer cylinder 134. Additionally, it may further comprise a scraping mesh 135, a grinding blade 136, and a flow generating nozzle 137.

The hot air supply chamber 131 is formed in the form of a container having an opened top surface, and the hot air supply path 125 is connected to one side to receive the combustion gas. That is, the combustion gas (more specifically, the hot air containing the combustion gas) supplied through the hot air supply path 125 flows into the inner space of the hot air supply chamber 131 in the form of a container.

The rotary drying chamber 132 is formed in a container shape having an opened upper surface and accommodated in the hot air supply chamber 131. An upper end of the rotary drying chamber 132 is connected to an upper end of the hot air supply chamber 131, And is connected to the rotating rotary shaft 132a so as to rotate. 2, when the rotary drying chamber 132 is contained in the hot air supply chamber 131, the top surface of the hot air supply chamber 131 is closed by the rotary drying chamber 132 A space is formed between the hot air supply chamber 131 and the rotary drying chamber 132, and the combustion gas flows into the space immediately therebetween. The hot air supply chamber 131 is fixed and the rotary drying chamber 132 is rotated so that the upper ends of the two components are connected to each other. The upper end of the hot air supply chamber 131 and the upper end of the rotary drying chamber 132 may be provided with a carbon packing interposed therebetween so as to close the upper end connecting portion and reduce friction.

The rotary drying chamber 132 is also made of a porous material so that the wall surface can pass through the gas. Accordingly, the combustion gas introduced into the space formed between the hot air supply chamber 131 and the rotary drying chamber 132 passes through the wall surface of the rotary drying chamber 132 and flows into the rotary drying chamber 132 (I.e., inside of the " container "). The wall surface of the rotary drying chamber 132 may be in the form of a plate or the like having a plurality of holes.

The sludge supply path 133 injects sludge supplied from the sludge supply unit 110 into the rotary drying chamber 132. As shown in FIG. 2, the sludge inlet path 133 is preferably formed to extend in the vertical direction and to inject the sludge into the rotary drying chamber 132, and to expand downward. Since the sludge charging passage 133 has such a shape, a sufficient passage area can be ensured even if a part of the sludge is adhered to the wall of the sludge charging passage 133 in the process of injecting the sludge, Can be achieved.

The outer cylinder 134 is formed in the form of a container for housing the hot air supply chamber 131 and the rotary drying chamber 132 therein. At this time, the powder discharging passage 145 is connected to one side of the outer cylinder 134, so that the drying sludge powder and the malodorous gas generated as the sludge is dried in the rotary drying chamber 132 can be discharged. That is, since the outer cylinder 134 is isolated from the outer space, the dried sludge powder and the malodorous gas generated during the drying of the sludge are collected without being spread out, As shown in FIG.

The process of drying the sludge in the rotary drying unit 130 will be described in more detail as follows. First, when the sludge is introduced into the rotary drying chamber 132 through the sludge inlet path 133, the sludge introduced into the rotary drying chamber 132 is spread in the form of a thin film on the wall surface of the rotary drying chamber 132 by rotation . Next, the combustion gas supplied to the space between the hot air supply chamber 131 and the rotary drying chamber 132 passes through the wall surface of the rotary drying chamber 132 to dry the sludge spread in the form of a thin film. That is, the sludge is dried by heat received directly from the hot combustion gas or from the wall surface of the rotary drying chamber 132 heated by the combustion gas. Since the sludge itself is spread by rotation and is formed in a thin film form, The drying can be performed at a very high speed. As the sludge is dried at a high speed in the rotary drying chamber 132, the dry sludge powder and the malodorous gas are mixed.

In order to improve the performance of the rotary drying unit 130, various configurations may be further provided.

The scraping mesh 135 is formed of a mesh material and is connected to the sludge inlet path 133 to be provided in the rotary drying chamber 132. 2, the scraping mesh 135 is in contact with the inner wall of the rotary drying chamber 132, so that the sludge thin film attached to the inner wall of the rotary drying chamber 132 It scrape off. The scraping mesh 135 may be fixed to the rotary drying chamber 132 because the rotary drying chamber 132 is rotating even if the scraping mesh 135 is fixedly provided in the sludge inlet path 133. [ The entire inner wall can be scraped off smoothly. The scraping mesh 135 scrapes the sludge thin film to prevent the holes formed in the wall of the rotary drying chamber 132 from being clogged so that the flow of the combustion gas can be smoothly performed. Also, the thin film is prevented from becoming too thick, and high-speed sludge drying can be achieved.

The crushing blade 136 is provided below the rotary drying chamber 132 to crush the accumulated sludge accumulated under the rotary drying chamber 132. As described above, the sludge is dried in a state of being spread in the form of a thin film on the wall surface of the rotary drying chamber 132 by rotation, but it is not heated sufficiently at the initial stage of the process, Even in the middle of the process, excessive sludge supply may cause sludge that has not been dried yet to fall off. If the sludge collected in the lower portion of the rotary drying chamber 132 falls down as described above, correct processing may not be performed and accumulation may occur. However, since the crushing blade 136 is provided, such a problem can be prevented originally . The crushing blade 136 may be installed in parallel to the rotating direction of the rotary drying chamber 132, vertically installed, or provided with a suitable inclination.

A plurality of the flow generating nozzles 137 are distributed on the outer cylinder 134 to generate a gas flow. By the flow generated by the flow generating nozzle 137, a mixture of the dry sludge powder and the malodorous gas produced in the rotary drying chamber 132 can be attracted to the powder discharge path 145 more smoothly.

It will be understood by those skilled in the art that various changes in form and details may be made therein without departing from the spirit and scope of the invention as defined by the appended claims. It goes without saying that various modifications can be made.

100: sludge fast drying apparatus 110: sludge supply unit
120: combustion chamber 125: hot air supply path
125N: hot air supply nozzle 125a: gas discharge path
130: rotating and drying unit
131: Hot air supply chamber 132: Rotary drying chamber
132M: motor 132a:
133: sludge input line 134: outer tube
136: crushing blade 137: flow generating nozzle
140: collecting separator 141: cyclone
142: odor discharge line 143: powder receiving portion
145: Powder discharge furnace 145N: Powder attracting nozzle

Claims (15)

A sludge supply unit for receiving and supplying sludge;
A combustion chamber for combusting fuel for combustion to generate combustion gas;
The sludge is supplied from the sludge supply unit, the combustion gas is supplied from the combustion chamber through the hot air supply path, the sludge is rotated to form a thin film and dried with a combustion gas to form a mixture of the dried sludge powder and the malodorous gas part;
A collecting / separating unit which receives a mixture of the dried sludge powder and the malodorous gas from the rotary drying unit through the powder discharge path, separates the solid powder and collects the powder in the lower part, and separates and discharges the odor-
And,
The malodorous gas discharged from the dust collecting and separating unit is supplied to the combustion chamber and burned to remove odors, and the dried sludge powder collected in the dust collecting and separating unit is supplied to the combustion chamber and used as combustion fuel,
The rotation /
A hot air supply chamber which is formed in a container form having an opened upper surface and to which the hot air supply path is connected to receive combustion gas;
The upper end of the hot air supply chamber is connected to the upper end of the hot air supply chamber. The upper end of the hot air supply chamber is connected to the rotating shaft by a motor. A rotary drying chamber for rotating the rotary drying chamber;
A sludge supply path for injecting sludge supplied from the sludge supply unit into the rotary drying chamber;
The drying sludge powder and the malodorous gas generated as the sludge is dried in the rotary drying chamber are discharged through the powder discharge path connected to one side of the rotary drying chamber. Outer tube;
, ≪ / RTI >
The sludge injected into the rotary drying chamber is spread in the form of a thin film on the wall of the rotary drying chamber by rotation,
And the combustion gas supplied to the space between the hot air supply chamber and the rotary drying chamber passes through the wall surface of the rotary drying chamber to dry the sludge spread in the form of a thin film,
Wherein the sludge is made of a mixture of dry sludge powder and malodorous gas.
The sludge drying apparatus according to claim 1,
A hot air supply nozzle provided on the hot air supply path and configured in the form of a coanda nozzle for discharging the mixed gas of the additional gas and the working gas by the operation gas being drawn by the additional gas supplied to the inside.
Further comprising:
Wherein the working gas in the hot air supply nozzle is a combustion gas supplied from the combustion chamber and the additional gas in the hot air supply nozzle is compressed air supplied from the outside.
The sludge drying apparatus according to claim 1,
A powder-driven nozzle provided on the powder discharge path and configured in the form of a Coanda nozzle for discharging the mixed gas of the additional gas and the working gas by the working gas being drawn by the additional gas supplied to the inside;
Further comprising:
Characterized in that the working gas in the powder-laden nozzle is a mixture of dry sludge powder and malodorous gas discharged from the rotary drying section, and the additional gas in the powder-laden nozzle is compressed air supplied from the outside Device.
delete The apparatus according to claim 1,
A scraping mesh formed of a mesh material and connected to the sludge inlet path to scrape off the sludge thin film attached to the inner wall of the rotary drying chamber;
And drying the sludge at a high speed.
The apparatus according to claim 1,
A crushing blade provided below the rotary drying chamber for crushing accumulated sludge accumulated under the rotary drying chamber;
Wherein the sludge drying apparatus further comprises:
The apparatus according to claim 1,
A plurality of flow distribution nozzles distributed on the outer cylinder to generate a gas flow so that a mixture of dried sludge powder and malodorous gas produced in the rotary drying chamber is drawn into the powder discharge path;
Wherein the sludge drying apparatus further comprises:
The sludge charging system according to claim 1,
Wherein the sludge drying apparatus comprises a sludge drying unit and a sludge drying unit.
The apparatus according to claim 1,
And a carbon packing is provided at a connection portion between the upper end of the hot air supply chamber and the upper end of the rotary drying chamber.
The apparatus according to claim 1,
A cyclone for separating and discharging the dry sludge powder in a solid state, and discharging the offensive odor-containing gas in the upper part to discharge the powder;
A malodor discharge line connected to the upper portion of the cyclone to discharge the malodorous gas;
A powder receiving portion connected to the lower portion of the cyclone to collect the dried sludge powder;
And drying the sludge.
The sludge drying apparatus according to claim 1,
A gas discharge passage provided on the hot air supply passage for discharging a part of the combustion gas;
And drying the sludge at a high speed.
A sludge fast drying method using the sludge fast drying apparatus according to claim 1,
Receiving sludge in the sludge supply;
The combustion fuel is combusted in the combustion chamber to generate a combustion gas;
Drying the dried sludge powder and the malodorous gas by supplying the sludge and the combustion gas to the rotary drying unit and drying the rotary drying unit with the combustion gas while rotating the sludge;
Separating the dry sludge powder and the malodorous gas by supplying a mixture of the dry sludge powder and the malodorous gas to the collecting and separating section;
The malodorous gas separated from the dust collecting and separating unit is supplied to the combustion chamber so that the odor is burned and removed;
The dried sludge powder collected in the collecting and separating unit is supplied to the combustion chamber and used as combustion fuel;
And drying the sludge.
13. The method of claim 12,
The sludge-high-
A hot air supply nozzle provided on the hot air supply path and configured in the form of a coanda nozzle for discharging the mixed gas of the additional gas and the working gas by the operation gas being drawn by the additional gas supplied to the inside. Further comprising:
Wherein the working gas in the hot air supply nozzle is a combustion gas supplied from the combustion chamber and the additional gas in the hot air supply nozzle is compressed air supplied from the outside,
In the sludge fast drying method,
Wherein hot air, which is a mixed gas of combustion gas and compressed air, is supplied to the rotary drying unit through the hot air supply nozzle to dry the sludge.
14. The method of claim 13, wherein the sludge-
Wherein the hot air of the mixed gas of the combustion gas and the compressed air is formed with the oxygen concentration within the range of 3% to 16%, and the temperature is formed within the range of 100 to 600 degrees centigrade.
13. The method of claim 12,
The sludge-high-
A hot air supply chamber which is formed in a container form having an opened upper surface and to which the hot air supply path is connected to receive combustion gas;
The upper end of the hot air supply chamber is connected to the upper end of the hot air supply chamber. The upper end of the hot air supply chamber is connected to the rotating shaft by a motor. A rotary drying chamber for rotating the rotary drying chamber; Further comprising:
In the sludge fast drying method,
Injecting sludge into the rotary drying chamber;
The sludge injected into the rotary drying chamber is spread in the form of a thin film on the rotary drying chamber wall by rotation;
Drying the sludge having the combustion gas supplied to the space between the hot air supply chamber and the rotary drying chamber passed through the wall surface of the rotary drying chamber and spread in a thin film form;
The sludge being made of a mixture of dry sludge powder and malodorous gas;
And drying the sludge.

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