KR100759416B1 - Sludge drying device for shaftless spiralscrew - Google Patents

Abstract

A sludge drying equipment using a main shaftless screw, which improves the drying efficiency of sludge by rapidly evaporating and drying water contained in sludge, and which is environmentally friendly by recovering latent heat contained in air, thereby removing odor contained in sludge using the latent heat, is provided. A sludge drying equipment using a main shaftless screw comprises: a crushing part(10) including at least one first crushing roller(11) rotatably connected to a drive motor; a transfer part(20) including a main shaftless screw(21) connected to the crushing part and installed in an internal space and rotated by a transfer motor, and a plurality of halogen heaters(22) or magnetron oscillators(23) as first heating unit for evaporating and drying water contained in the sludge; a sludge discharge part(30) including at least one second crushing roller(31) connected to a lower side of the transfer part; a cyclone part(50) including a first transfer pipe which is connected to one side of the transfer part, and through which air containing alien substances moves, wherein the cyclone part centrifugally separates the alien substances from the air while rotating the moved air; a heat supply part(60) including an electric heater(62) as a second heating unit installed on a second transfer pipe(61) connected to the cyclone part to heat the alien substance-separated air; a third transfer pipe(70) which covers an outer surface of the transfer part and is connected to the second transfer pipe, and in which a space part is formed to move heated air; and a branched pipe(80) which is connected to a lower side of the third transfer pipe such that a blowing fan(81) is interposed between the third transfer pipe and the branched pipe, and which is divided into a plurality of branched pipes.

Description

Sludge Drying Device for Shaftless Spiralscrew}

1 is a schematic view showing a sludge drying apparatus according to the present invention.

2 is an enlarged sectional view taken along the line A-A according to FIG.

3 is a cross-sectional plan view of a cyclone according to the present invention.

*** Explanation of symbols for the main parts of the drawing ***

10: grinding part, 11: first grinding roller,

11a: drive motor, 20: transfer part,

21: spindleless screw, 21a: feed motor,

22: halogen heater, 23: magnetron oscillator,

30: sludge discharge part, 31: second grinding roller,

40: first transport pipe, 50: cyclone portion,

51: cylinder, 52: cone,

53: outlet portion, 60: heat supply portion,

61: second conveying pipe, 62: electric heater,

70: third transfer pipe, 80: branch pipe,

81: blower fan.

The present invention relates to a sludge drying apparatus using a screwless screw, and more particularly, to improve the drying efficiency of the sludge, as well as the latent heat contained in the air by rapidly evaporating and drying the water contained in the sludge to control the moisture content. The present invention relates to a sludge drying apparatus using a non-screwed screw, which can be eco-friendly by discharging odors contained in the sludge by forming a sealed structure to recover the waste.

In general, organic and inorganic sludge generated from various industrial sites, sewage treatment plants, or livestock farms, and wastewater treated with manure, is a humid material having a water content of about 75 to 95%.

Here, sludge refers to sludge, industrial waste or sewage treatment, sewage treatment sediment, etc., and is also referred to as sludge. The main components at this time include organic substances and inorganic substances. In addition, in the process of acid-treating a metal surface, the metal surface, such as boilers, ships, and tanks which contact water, peels and deposits, and turns into a mud state. The main component of sludge is a metal or its compound.

In particular, sludge containing organic material has higher moisture content than inorganic sludge even if it is dehydrated, and if such humid sludge is landfilled, soil and groundwater contamination as well as environmental pollution are caused by leachate generated in large quantities. Most sludges are dehydrated or dried below a certain moisture content and then incinerated or recycled, landfilled and dumped at sea.

The sludge can be burned by dehydrating and drying the contained water to about 30 to 40% or less, so that the sludge is sufficiently recycled as an energy resource, and it is also possible to bury the landfill in accordance with the standard value as a landfill material. Apparatus and drying apparatus have been developed.

However, in order to form a sludge moisture content of about 30-40% or less through the dehydration device, a considerable amount of expensive equipment is required, and in order to dry the sludge moisture content to 60% or less through a drying device, an expensive device, equipment cost, and treatment cost are required do.

That is, the sludge is treated by incineration, landfilling, or the like, and in general, even if dehydration is carried out through a dehydration apparatus, the water content is high and the cost is high, and secondary pollution occurs.

Sludge generated from wastewater treatment plant, water supply facility, food treatment facility, etc. is taken out through a dehydrator through a conveyor system. At this time, the water content of the sludge is 75% or more on average, and even though it is compressed to a high pressure, the water content is about 73%, so it is excessively expensive to incinerate or landfill, and excessive costs may be increased to lower the water content even with a general dehydrator. There is no choice but to.

In particular, as a device for drying sludge with high moisture content, a method of directly drying the sludge by hot air while transferring the sludge to a conveying device, and indirectly while contacting the sludge with the heat-transfer surface of the inner or outer surface of the cylinder heated by a heater or steam, etc. There is a method of drying.

However, it is used in the direct and indirect drying method of the sludge, and the drying apparatuses provided so far have sludge attached to the dryer wall or the conveying apparatus due to the viscosity of the sludge with high water content, and the conveying speed is low, so the drying efficiency is very low. There were many problems in operation, and because of the complicated structure of the conveying device and the large number of machine driving parts, the frequency of device failure was high, and the life of the device was short, so there was also difficulty in maintenance.

Moreover, in the conventional method of using a screw as a sludge conveying means among the drying apparatus, a spindle-type screw having a spiral blade around a major diameter of a large diameter is used.

In case of using the spindle screw as described above, the highly viscous sludge sticks easily to the spindle and the screw blade during the transfer, and due to the difficulty in stirring due to the difficulty of stirring due to the coarse diameter spindle, the load of the driving unit is increased. Or slow feed speed.

In addition, in the direct drying method using the spindle screw, the transported sludge does not have uniform contact with the heat source, and the drying efficiency is very low.In the indirect drying method, sludge is attached to the heat transfer surface, which lowers the heat transfer rate. As the drying efficiency is lowered, there have been problems such as cleaning the sludge stuck to the spindle screw or the heat transfer surface from time to time.

The present invention has been made in order to solve the above problems, while the sludge injected from the crushing unit is transferred through a spindleless screw installed in the conveying unit through a plurality of halogen heaters and magnetron oscillator to generate heat and heat from the inside of the sludge to dry and hot air By discharging by discharging, by moving the air containing the foreign matter by centrifugation to remove the foreign matter through the cyclone portion, by removing the foreign matter by heating with an electric heater to move the air, and then through the blower fan By drying the sludge by moving the heated air to the screw side, the moisture contained in the sludge is evaporated and dried rapidly to improve the drying efficiency of the sludge as well as to improve the drying efficiency of the sludge, and to collect and recover the latent heat contained in the air. Formed in the sludge Do not take such a discharge to the outside has its aims to promote environmentally friendly.

According to the sludge drying apparatus using the spindleless screw according to the present invention to achieve the object as described above, at least one first grinding roller is rotated in connection with the drive motor so that the sludge introduced from the top is pulverized A grinding unit installed; The sludge is connected to the crushing unit, and a screwless screw for transporting the sludge introduced from the crushing unit to the inner space is rotatably installed by a transfer motor, and evaporated to dry the water contained in the sludge. A transfer unit in which a plurality of first heating means are installed; A sludge discharge part connected to a lower side of the conveying part, and the sludge conveyed and dried by the spindleless screw is pulverized and discharged through at least one second grinding roller; A cyclone unit in which air containing foreign matter is moved through a first transport pipe connected to one side of the transfer unit, the foreign matter is centrifuged while the moved air is rotated, and the air from which the foreign matter is separated is pivoted up and discharged upward; A heat supply unit having second heating means to heat air from which foreign matter is separated in a second transfer pipe connected to the cyclone unit; A third transport pipe surrounding the outer surface of the transport part and connected to the second transport pipe and having a space formed therein to move heated air; And a blowing pipe interposed between the lower side of the third transfer pipe and interposed with a plurality of branch pipes so as to move from the third transfer pipe to the spindleless screw side of the transfer unit via the blowing fan.

And, the first heating means is characterized in that the halogen heater or magnetron oscillator.

The cyclone unit may further include: a cylinder unit having a predetermined diameter and the inlet air pivoting along an inner circumferential surface thereof; Conical portion is formed so that the radius gradually decreases toward the lower portion of the cylindrical portion, foreign matter in the air is discharged to the lower portion; And it is connected to the center of the cylindrical portion is characterized in that it comprises an outlet for discharging the air is separated foreign matters.

In addition, the second heating means is characterized in that the electric heater.

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

1 is a schematic view showing a sludge drying apparatus according to the present invention, Figure 2 is a schematic A-A enlarged cross-sectional view according to Figure 1, Figure 3 is a cross-sectional plan view of a cyclone according to the present invention.

Sludge drying apparatus using a screwless screw according to the present invention, as shown in Figures 1 to 3, the crushing unit 10, the conveying unit 20, the sludge discharge unit 30, the cyclone unit 50, It comprises a heat supply unit 60, the third transfer pipe 70 and the branch pipe (80).

The grinding unit 10 has at least one first grinding roller 11 which is connected to the driving motor 11a and rotated, and the first grinding roller 11 grinds the sludge introduced from the top.

The conveying unit 20 is connected to one end of the crushing unit 10, the crushed sludge is introduced, the screwless screw 21 and the first heating means is installed in the inner space.

The spindleless screw 21 is helically arranged to convey the sludge introduced from the crushing unit 10 and is rotatably installed by the transfer motor 21a.

In addition, a plurality of first heating means are installed inside the transfer part 20 along the longitudinal direction of the spindleless screw 21.

Here, the first heating means is preferably a halogen heater 22 or a magnetron oscillator 23.

The halogen heater 22 is a kind of incandescent lamp, in which a halogen material is injected into a glass sphere, and is formed in a rod shape to emit high temperature heat and light wavelengths such as initial rays. In addition, the magnetron oscillator 23 emits, at a high power, an electromagnetic wave having a frequency equal to 2450 MHz in a high frequency oscillator called a magnetron.

As the moisture contained in the sludge conveyed through the spindleless screw 21 is rapidly evaporated to dryness through the first heating means as described above, the drying efficiency of the sludge is improved. That is, heat is directly applied to the inside and outside of the sludge through the halogen heater 32 and the magnetron oscillator 23 as the first heating means.

As will be described below, as the sludge conveyed through the spindleless screw 21 in the conveying unit 20 is dried by the first heating means, water vapor is generated, and through a plurality of branch pipes connected to the conveying unit 20. Hot air is applied directly to the sludge to dry it. If a separate hot air is not applied, the sludge may not be dried efficiently, and therefore, it is preferable to promote and discharge the sludge through hot air.

In addition, the sludge discharge portion 30 is connected to the lower side of the transfer portion 20, it is installed to face the end of the spindleless screw 21. The sludge conveyed and dried through the spindleless screw 21 is discharged through the sludge discharge part 30, and at least one second grinding roller 31 is installed and dried in the sludge discharge part 30. Crushed and discharged.

In addition, the cyclone unit 50 is introduced into the air containing the foreign matter through the first transfer pipe 40 connected to one side of the transfer unit 20.

The cyclone part 50 is formed to have a predetermined diameter and a cylindrical portion 51 in which the inlet air pivots along the inner circumferential surface thereof, and gradually decreases a radius toward the lower portion of the cylindrical portion 51, and foreign matter in the air. Conical portion 52 is discharged to the lower portion and the outlet portion 53 is connected to the center of the cylindrical portion 51 is discharged to the upper air is separated foreign matter is made up.

That is, the air containing the foreign matter is moved to the cylindrical portion 51 through the first transfer pipe 40, and the moved air is rotated along the inner wall surface of the cylindrical portion 51 to perform the downturn flow It is formed, foreign matter such as moisture and dust having a large specific gravity is centrifuged and discharged to the collecting portion (not shown) through the conical portion 52. Then, the air separated from the foreign matter through the outlet portion 53 is discharged to the upper portion while turning up.

In addition, the heat supply unit 60 is provided with a second transfer pipe 61 is connected to the cyclone unit 50, the second heating to heat the air separated foreign matter in the second transfer pipe 61 Means are installed. Here, the second heating means is preferably made of an electric heater (62).

In addition, the third transfer pipe 70 surrounds the outer surface of the transfer unit 20 and is connected to the second transfer pipe 61, and a space part is formed therein, so that the air heated from the heat supply unit 60 moves. Will be

In addition, the branch pipe (80) is connected to the lower side of the third transfer pipe (70) with a blowing fan (81) interposed therebetween, and from the third transfer pipe (70) via the blowing fan (81). It is branched into a plurality of pieces so as to be moved toward the non-spindle screw 21 side of the transfer part 20.

That is, the branch pipe 80 is heated air generated through the electric heater 62 of the second transfer pipe 61 is moved to the third transfer pipe 70, so that the heated air is not emitted to the outside. As an air passage to absorb waste heat, there is a thermal effect to prevent the internal temperature from going out.

Therefore, hot air is directly applied to the sludge through the plurality of branch pipes 80 connected to the transfer part 20, thereby drying the recovered latent heat.

The sludge drying apparatus using the spindleless screw according to the present invention as described above will be briefly described with reference to FIGS. 1 to 3.

First, the sludge which is crushed and introduced from the crushing unit 10 through the first crushing roller 11 is conveyed in one direction through the spindleless screw 21 installed in the conveying unit 20.

Subsequently, the sludge conveyed through the spindleless screw 21 is dried through the plurality of halogen heaters 22 and the magnetron oscillator 23. That is, the moisture contained in the sludge is rapidly evaporated and dried through the first heating means to adjust the moisture content to improve the drying efficiency of the sludge.

Subsequently, the sludge in the conveying part 20 is moved from the end of the spindleless screw 21 to the sludge discharge part 30 formed through the lower part of the conveying part 20, and the sludge discharge part 30 is removed. It is pulverized and discharged through the two grinding rollers 31.

In addition, the air containing the foreign matter is moved to the cyclone unit 50 through the first transfer pipe 40 connected to the transfer unit 20.

Subsequently, the air flowing through the first transfer pipe 40 forms a descending swirl flow while turning the inside along the inner wall surface of the cylindrical portion 51 of the cyclone portion 50, and the foreign matter is centrifuged to separate the circle. The air is discharged through the weight portion 52, and the air from which the foreign matter is separated through the outlet portion 53 of the cyclone portion 50 turns upward and is discharged upward.

In addition, air moves through the second transfer pipe 61 connected to the cyclone part 50, and the moving air is heated through the second heating means, that is, the electric heater 62.

In addition, the heating air is moved to the blowing fan 81 through the lower side of the third transfer pipe 70 connected to the second transfer pipe 61, the branch pipe branched into a plurality of through the blowing fan 81. Hot air is moved to the non-screw shaft 21 through 80 to dry the sludge.

Therefore, by forming a sealed structure to recover the latent heat contained in the air as described above, it is possible to eco-friendly by not discharging the odor contained in the sludge to the outside.

Although the preferred embodiments of the present invention have been described above, the scope of the present invention is not limited to such specific embodiments, and those skilled in the art may appropriately change within the scope described in the claims of the present invention. This will be possible.

As described above, according to the sludge drying apparatus using the non-screw screw according to the present invention, by rapidly evaporating and drying the moisture contained in the sludge to improve the drying efficiency of the sludge, as well as the latent heat contained in the air It is effective in promoting eco-friendliness by not discharging the odors contained in the sludge to the outside by forming a sealed structure to recover and recycle.

Claims (4)

A crushing unit in which at least one first grinding roller which is connected to the driving motor and rotated is installed so that the sludge introduced from the upper part is crushed; The sludge is connected to the crushing unit, and a screwless screw for transporting the sludge introduced from the crushing unit to the inner space is rotatably installed by a transfer motor, and evaporated to dry the water contained in the sludge. A transfer unit in which a plurality of first heating means are installed; A sludge discharge part connected to a lower side of the conveying part, and the sludge conveyed and dried by the spindleless screw is pulverized and discharged through at least one second grinding roller; A cyclone unit in which air containing foreign matter is moved through a first transport pipe connected to one side of the transfer unit, the foreign matter is centrifuged while the moved air is rotated, and the air from which the foreign matter is separated is pivoted up and discharged upward; A heat supply unit having second heating means to heat air from which foreign matter is separated in a second transfer pipe connected to the cyclone unit; A third transport pipe surrounding the outer surface of the transport part and connected to the second transport pipe and having a space formed therein to move heated air; And A non-axial screw including a plurality of branch pipes connected to a lower side of the third conveying pipe through an air blowing fan, and branched into a plurality of branch pipes so as to move from the third conveying pipe to the non-axial screw side of the conveying part via the blowing fan; Used sludge drying device. The method of claim 1, The first heating means is a sludge drying apparatus using a screwless screw, characterized in that the halogen heater or magnetron oscillator. The method of claim 1, The cyclone unit, A cylindrical portion having a predetermined diameter and the inlet air pivots along the inner circumferential surface; Conical portion is formed so that the radius gradually decreases toward the lower portion of the cylindrical portion, foreign matter in the air is discharged to the lower portion; And Sludge drying apparatus using a screwless screw, characterized in that it comprises an outlet connected to the center of the cylindrical portion is discharged to the air separated foreign matters. The method of claim 1, The second heating means is a sludge drying apparatus using a screwless screw, characterized in that the electric heater.

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