KR20130009404A - Sludge drier and the method of drying sludge using it - Google Patents

Sludge drier and the method of drying sludge using it Download PDF

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Publication number
KR20130009404A
KR20130009404A KR1020110070504A KR20110070504A KR20130009404A KR 20130009404 A KR20130009404 A KR 20130009404A KR 1020110070504 A KR1020110070504 A KR 1020110070504A KR 20110070504 A KR20110070504 A KR 20110070504A KR 20130009404 A KR20130009404 A KR 20130009404A
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South Korea
Prior art keywords
sludge
case
microwave
drying apparatus
inlet
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KR1020110070504A
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Korean (ko)
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황승원
박상준
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황승원
박상준
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Priority to KR1020110070504A priority Critical patent/KR20130009404A/en
Publication of KR20130009404A publication Critical patent/KR20130009404A/en

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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B09—DISPOSAL OF SOLID WASTE; RECLAMATION OF CONTAMINATED SOIL
    • B09B—DISPOSAL OF SOLID WASTE NOT OTHERWISE PROVIDED FOR
    • B09B3/00—Destroying solid waste or transforming solid waste into something useful or harmless
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F11/00—Treatment of sludge; Devices therefor
    • C02F11/12—Treatment of sludge; Devices therefor by de-watering, drying or thickening
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F26—DRYING
    • F26B—DRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
    • F26B3/00—Drying solid materials or objects by processes involving the application of heat
    • F26B3/32—Drying solid materials or objects by processes involving the application of heat by development of heat within the materials or objects to be dried, e.g. by fermentation or other microbiological action
    • F26B3/34—Drying solid materials or objects by processes involving the application of heat by development of heat within the materials or objects to be dried, e.g. by fermentation or other microbiological action by using electrical effects
    • F26B3/347—Electromagnetic heating, e.g. induction heating or heating using microwave energy
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F26—DRYING
    • F26B—DRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
    • F26B2200/00—Drying processes and machines for solid materials characterised by the specific requirements of the drying good
    • F26B2200/18—Sludges, e.g. sewage, waste, industrial processes, cooling towers

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  • Engineering & Computer Science (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Microbiology (AREA)
  • Environmental & Geological Engineering (AREA)
  • Water Supply & Treatment (AREA)
  • Chemical & Material Sciences (AREA)
  • Organic Chemistry (AREA)
  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Health & Medical Sciences (AREA)
  • Biomedical Technology (AREA)
  • Biotechnology (AREA)
  • Hydrology & Water Resources (AREA)
  • Molecular Biology (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Treatment Of Sludge (AREA)

Abstract

The present invention relates to a sludge drying apparatus having a new structure that can effectively remove the water contained in the sludge using a microwave and a sludge treatment method using the same.
The sludge drying apparatus according to the present invention is irradiated with microwaves to the sludge conveyed by the transfer station to remove the water contained in the sludge by evaporation, compared to the conventional sludge drying apparatus which removes moisture by a mechanical method. It can be effectively removed, in particular, there is an advantage that can effectively dry the gel type sludge having a high water content.

Figure P1020110070504

Description

Sludge drier and the method of drying sludge using it}

The present invention relates to a sludge drying apparatus having a new structure that can effectively remove the water contained in the sludge using a microwave and a sludge treatment method using the same.

In general, sludge generated in a wastewater treatment plant or various other places has a very high water content, and is transported or treated after removing water using a drying apparatus.

As such, the sludge drying apparatus for drying the sludge is a screw drying method for pressurizing and drying the sludge by using a compression screw installed inside the cylinder, or after supplying sludge between the filter screens and pressing the upper and lower surfaces of the filter screen to pressurize the sludge. The water contained in the sludge is removed using a mechanical method, such as a filter screen method for drying or a centrifugal method for removing water using a centrifugal force by rotating the sludge at a high speed.

However, the method of removing the water contained in the sludge by pressing the sludge in this way can not effectively remove the sludge, in particular, there was a problem that it is difficult to effectively dry the gel-type sludge having a viscosity such as manure discharged from the barn.

In particular, even when the sludge is dried by the conventional method, it is difficult to lower the water content of the sludge to 80% or less, there was a problem that it is difficult to utilize the sludge as landfill or dumping or composting.

The present invention is to solve the above problems, an object of the present invention is to provide a sludge drying apparatus and a sludge treatment method using a new structure that can effectively remove the water contained in the sludge using a microwave.

The present invention for achieving the above object is composed of a hermetically sealed structure and the case 10 is formed in the inlet 11 and the outlet 12 on both sides, and installed in the case 10 and the inlet ( 11, a conveying apparatus 20 for conveying the sludge 1 supplied to the discharge port 12 and the sludge 1 provided on one side of the case 10 and conveyed by the conveying apparatus 20. Microwave generating device 40 for generating a microwave to face () to heat the moisture contained in the sludge 1, and a vacuum connected to one side of the case 10 to discharge the air inside the case 10 Including a pump 50, the vacuum pump 50 to the inside of the vacuum chamber 13 to a negative pressure state, characterized in that the moisture heated by the microwave generator 40 is evaporated at a low temperature Sludge drying apparatus is provided.

According to another feature of the invention, further comprises a screw conveyor 30 connected to the inlet 11 of the case 10, the outside air through the inlet 11 of the case 10 inside the case 10 Provided is a sludge drying apparatus, characterized in that to prevent the inflow to.

According to another feature of the invention, it is further characterized in that it further comprises a molding machine 60 is connected to the outlet 12 of the case 10 for press molding the sludge 1 discharged through the outlet 12 Sludge drying apparatus is provided.

According to another feature of the invention, the conveying device 20 is composed of a belt conveyor device including a roller 21 and a conveyor belt 22 over the roller 21, the microwave generating device 40 ) Is a microwave oscillator 41 provided on one side of the case 10, a dummy rod 42 connected to the microwave oscillator 41, and extends from the dummy rod 42 and the case 10 It is connected to the upper surface of the waveguide 43 for discharging the microwave to the upper portion of the sludge (1) conveyed by the conveying device 20, the lower side of the conveying device 20 of the waveguide 43 A sludge drying apparatus is provided, which is provided with a reflecting plate 44 which reflects microwaves emitted from the end and passed through the sludge 1.

According to another feature of the present invention, while supplying the sludge 1 to the inside of the case 10 in which the vacuum chamber 13 of the negative pressure state therein is transferred to the transfer device 20, the case of the case 10 The microwave is irradiated to the sludge 1 with a microwave using the microwave generator 40 provided at one side to dry the sludge 1 at a water content of 50 to 56%, and the dried sludge 1 is pressurized. After the heating to 800 ~ 1200 ℃ is provided a sludge treatment method characterized in that the production to a block.

The sludge drying apparatus according to the present invention is irradiated with microwaves to the sludge conveyed by the transfer station to remove the water contained in the sludge by evaporation, compared to the conventional sludge drying apparatus which removes moisture by a mechanical method. It can be effectively removed, in particular, there is an advantage that can effectively dry the gel type sludge having a high water content.

1 is a side view showing a sludge drying apparatus according to the present invention,
Figure 2 is a front sectional view showing a sludge drying apparatus according to the present invention,
3 is a side cross-sectional view showing a cross section taken along the line AA of FIG.
4 is a side cross-sectional view showing a section taken along line BB of FIG.
5 is a side cross-sectional view showing a section taken along the line CC of FIG.
6 is a reference diagram showing a modification of the sludge drying apparatus according to the present invention.

Hereinafter, the present invention will be described in detail with reference to the accompanying drawings.

1 to 5 illustrate a sludge drying apparatus according to the present invention, a case 10 having an inlet 11 and an outlet 12 formed on both sides thereof, and installed in the case 10 and being disposed inside the case 10. 11, a conveying device 20 for transporting the sludge 1 supplied to the discharge port 12, a screw conveyor 30 connected to the inlet 11 of the case 10, and the case 10 And a microwave generating device 40 which is provided on one side and heats the water contained in the sludge 1 by generating a microwave so as to face the sludge 1 conveyed by the transfer device 20, and the case. A vacuum pump 50 connected to one side of the case 10 to discharge the air in the case 10 and a sludge 1 connected to the outlet 12 of the case 10 and discharged through the outlet 12. It consists of a molding machine 60 for pressing.

The case 10 is formed in the upper side of the support frame 14 is formed in a long duct shape to the left and right, it is composed of a hermetically sealed structure using a high strength metal plate vacuum chamber 13 inside ). The inlet 11 is formed on the upper surface of the supply end of the case 10, the outlet 12 is formed on the lower side of the discharge end of the case 10.

The conveying device 20 is composed of a belt conveyor device composed of a plurality of rollers 21 arranged in a row and a conveyor belt 22 spanning the rollers 21. In this case, the rollers 21 are shown in FIG. 3. As described above, the roller 20a comprises a horizontal roller 21a and a pair of inclined rollers 21b disposed to be inclined on both sides of the horizontal roller 21a, so that the conveyor belt 22 forms a U-shaped concave center. In addition, the driving motor 23 is connected to one side of the roller 21, the roller 21 is driven so that the conveyor is circulated along the roller 21 to transport the sludge 1 mounted on the upper surface do.

The screw conveyor 30 has a feed hopper 31a connected to an upper end of the screw conveyor 30, and one end of the screw conveyor 30 is hermetically connected to the inlet 11 of the case 10, and the inside of the conveying pipe 31. It is provided in and is composed of a transfer screw 32 which is driven by a drive motor 33 to press the sludge 1 supplied through the supply hopper (31a) to transfer to the tip portion, using the transfer screw 32 The sludge 1 is supplied to the inlet 11 of the case 10. At this time, since the sludge 1 supplied to the supply hopper 31a is compressed by the transfer screw 32 to block the internal space of the transfer tube 31, the outside air is transferred through the transfer tube 31. It prevents the inflow into the case 10.

1 and 4, the microwave generator 40 is a microwave oscillator 41 provided on one side of the case 10, and a dummy rod connected to the microwave oscillator 41 ( 42 and a waveguide 43 extending from the dummy rod 42 and connected to the upper surface of the case 10 to discharge microwaves to the top of the sludge 1 transported by the transfer device 20. In this case, the microwave generated in the dummy rod 42 is discharged to the upper portion of the sludge (1) conveyed by the conveying device 20 through the waveguide 43, the water particles contained in the sludge (1) By heating at high speed, the moisture particles are evaporated and removed. The microwave generating device 40 configured as described above is widely used for home or industrial purposes, and thus detailed description thereof will be omitted.

At this time, the microwave generating device 40 is installed at a predetermined interval along the longitudinal direction of the case 10. In addition, the lower side of the conveying device 20 is provided with a reflecting plate 44 reflecting the microwaves emitted from the end of the waveguide 43, the microwave passing through the sludge 1 and the conveying device 20 is By reflecting upward from the reflecting plate 44 and heating the sludge 1 again, the heating effect using the microwave generating device 40 can be enhanced.

The vacuum pump 50 is connected to the upper end of the case 10 of the case 10 through the exhaust pipe 51, as shown in Figure 5 to discharge the air inside the case 10, the inside of the case 10 The atmospheric pressure of the vacuum chamber 13 of the vacuum chamber 13 is lowered to a negative pressure so that the water heated by the microwave generator 40 can evaporate even at a low temperature. At this time, one side of the case 10 is connected to the air supply valve 51, the air pressure inside the case 10 is configured to maintain an appropriate level.

The molding machine 60 is connected to the outlet 12 of the case 10 and is provided in the extrusion tube 61 formed with a molding hole (61a) in the front, the inside of the extrusion tube 61 and the drive motor 63 It is composed of a compression screw 62 is discharged through the molding hole (61a) by pressing the sludge 1 is rotated by the supplied to the extrusion pipe (61).

Reference numeral 70, which is not described, shows a conveying conveyor apparatus for conveying the sludge 1 discharged from the molding machine 60.

Referring to the sludge treatment method using the sludge drying apparatus configured as described above are as follows.

First, in the state in which the transfer device 20, the vacuum pump 50, the microwave generator 40, and the molding machine 60 are operated, the screw conveyor 30 is driven to inject the opening 11 of the case 10. When the sludge 1 containing water is supplied to the sludge 1, the sludge 1 is heated along the conveying device 20 and heated by the microwave irradiated from the microwave generating device 40 to evaporate the moisture. At this time, since the vacuum pump 50 maintains the internal pressure of the vacuum chamber 13 at a negative pressure of about 750 to 800 mb, the water contained in the sludge 1 is boiled and evaporated at a low temperature of 100 ° C. or less. The microwave generating device 40 is to reduce the water content of the sludge 1 by about 50 to 66%.

Then, the sludge 1 in which water is evaporated is supplied to the molding machine 60 and then compressed by the compression screw 62 and discharged in a predetermined shape through the molding hole 61a.

Then, the press-molded sludge 1 is heated to 800-1200 ° C. and fired to produce a ceramic block.

The sludge drying apparatus configured in this way is irradiated with microwaves to the sludge 1 conveyed by the transfer station and evaporates and removes the water contained in the sludge 1, and thus, a conventional sludge drying apparatus for removing water by a mechanical method. Compared to the water, the moisture can be effectively removed, and the gel type sludge 1 having a high moisture content can be effectively dried.

In particular, since the vacuum chamber 13 inside the case 10 is lowered to a negative pressure state by using the vacuum pump 50, moisture contained in the sludge 1 is effectively evaporated at a low temperature, thereby improving energy efficiency. There are advantages to it.

In addition, the screw conveyor 30 is connected to the inlet 11 of the case 10, and the inlet 11 is hermetically sealed even when the sludge 1 is continuously supplied to the inlet 11 of the case 10. Thus, the vacuum chamber 13 has an advantage of being able to maintain a negative pressure state.

In addition, by extruding the sludge 1 dried by the molding machine 60 connected to the outlet 12 of the case 10, the sludge 1 is heated and calcined in a process to be described later, so that the block 10 can be easily manufactured. It has the advantage of being able to. In particular, by producing the sludge as a block, there is no need to landfill or dumping the sludge, there is an advantage that can prevent the environmental pollution caused by the sludge.

In addition, the microwave generating device 40 is configured to irradiate the microwaves to the upper portion of the sludge 1 conveyed by the conveying device 20, the microwave generating device ( The reflector plate 44 reflecting the microwaves generated by the 40 is provided, and the microwaves passing through the sludge 1 are reflected by the reflector plate 44 to reheat the sludge 1, thereby reducing the sludge 1. The heating efficiency is high.

In the present embodiment, the conveying device 20 is illustrated as being composed of a single long belt conveyor device, but by placing the several belt conveyor devices so as to have a mutual step, the sludge 1 conveyed by the belt conveyor device is a belt As shown in FIG. 6, the blade 24 is inclined to be inclined by falling down from the end of the conveyor apparatus or is inclined to the upper surface of the conveyor belt 22 at an upper portion of the transfer apparatus 20. As shown by the arrow, the sludge 1 conveyed by 22 may be configured to be turned over while riding over the blade 24.

Inverting the sludge 1 conveyed by the conveying device 20 in this way, there is an advantage that the sludge 1 of the lower side is exposed to the upper side and the sludge 1 can be uniformly dried.

In addition, although the screw conveyor 30 is illustrated as being connected to the inlet 11 of the case 10, it may be replaced with another kind of device to prevent external air from flowing through the inlet 11.

In addition, although the molding machine 60 is illustrated as being connected to the outlet 12, by connecting the device having the same configuration as the screw conveyor 30 to the outlet 12, the case 10 is simply provided through the outlet 12. It is also possible to prevent external air from entering into the inside of).

10. Case 20. Transfer device
30. Screw Conveyor 40. Microwave Generator
50. Vacuum pump 60. Molding machine

Claims (5)

A case 10 having an airtight sealing structure and having an inlet 11 and an outlet 12 formed on both sides thereof;
A transfer device 20 installed inside the case 10 and transferring the sludge 1 supplied to the inlet 11 to be discharged to the outlet 12;
The microwave generating device 40 is provided on one side of the case 10 and generates a microwave to face the sludge 1 conveyed by the conveying device 20 to heat moisture contained in the sludge 1. Wow,
Including a vacuum pump 50 is connected to one side of the case 10 to discharge the air in the case 10,
Sludge drying apparatus, characterized in that the vacuum pump (13) inside the vacuum chamber (13) to a negative pressure state so that the moisture heated by the microwave generator 40 is evaporated at a low temperature.
The method of claim 1,
Further comprising a screw conveyor 30 connected to the inlet 11 of the case 10,
Sludge drying apparatus, characterized in that to prevent the outside air flows into the case 10 through the inlet 11 of the case 10.
The method of claim 1,
Sludge drying apparatus further comprises a molding machine (60) connected to the outlet (12) of the case (10) for press molding the sludge (1) discharged through the outlet (12).
The method of claim 1,
The conveying device 20 is composed of a belt conveyor device including a roller 21 and a conveyor belt 22 spanning the roller 21,
The microwave generator 40 is a microwave oscillator 41 provided on one side of the case 10, a dummy rod 42 connected to the microwave oscillator 41, and in the dummy rod 42 Extends and is connected to an upper surface of the case 10 and comprises a waveguide 43 for discharging microwaves to the upper portion of the sludge 1 conveyed by the transfer device 20,
Sludge drying apparatus, characterized in that the lower side of the conveying device 20 is provided with a reflecting plate 44 which is emitted from the end of the waveguide 43 and reflects the microwaves passing through the sludge (1).
While supplying the sludge 1 to the inside of the case 10 in which the vacuum chamber 13 in the negative pressure state therein is transferred to the conveying apparatus 20,
Using the microwave generating device 40 provided on one side of the case 10 to irradiate the sludge 1 with a microwave to dry the sludge 1 with a water content of 50 to 56%,
Sludge treatment method characterized in that the dried sludge 1 is pressurized and then heated to 800 ~ 1200 ℃ calcined to produce a block.
KR1020110070504A 2011-07-15 2011-07-15 Sludge drier and the method of drying sludge using it KR20130009404A (en)

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Application Number Priority Date Filing Date Title
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KR2020130004371U Division KR20130004075U (en) 2013-05-30 2013-05-30 sludge drier

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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20160045297A (en) * 2014-10-17 2016-04-27 김중엽 Waste Food Drying System
CN109231764A (en) * 2018-10-30 2019-01-18 饶宾期 Microwave hot air jet stream cooperates with desiccation apparatus
CN116639859A (en) * 2023-04-19 2023-08-25 兰州铁道设计院有限公司 Sludge cleaning device and cleaning treatment process thereof

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20160045297A (en) * 2014-10-17 2016-04-27 김중엽 Waste Food Drying System
CN109231764A (en) * 2018-10-30 2019-01-18 饶宾期 Microwave hot air jet stream cooperates with desiccation apparatus
CN109231764B (en) * 2018-10-30 2023-11-14 明阳(宁波)环保科技有限公司 Microwave hot air jet flow cooperative drying device
CN116639859A (en) * 2023-04-19 2023-08-25 兰州铁道设计院有限公司 Sludge cleaning device and cleaning treatment process thereof

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