KR20170029275A

KR20170029275A - Sludge drying apparatus

Info

Publication number: KR20170029275A
Application number: KR1020150126404A
Authority: KR
Inventors: 최낙운
Original assignee: 최낙운
Priority date: 2015-09-07
Filing date: 2015-09-07
Publication date: 2017-03-15

Abstract

In the present invention, the moving port is coupled to the rotating bar hinged to the scraper so as to be inclined, so that the bottom edge of the moving port is rotated along the rotating axis in contact with the surface of the drying plate, so that the drying plate is heated to high temperature, The sludge can be dried while being moved to the center or outer edge of the drying plate and then discharged through the dropping groove and the drying efficiency can be increased to prevent the sludge from sticking to the surface of the drying plate or staying on the drying plate A sludge drying apparatus is disclosed.

Description

TECHNICAL FIELD [0001] The present invention relates to a sludge drying apparatus,

More particularly, the present invention relates to a sludge drying apparatus, and more particularly, to a sludge drying apparatus in which a moving sphere is coupled to a pivot bar hinged to a scraper so as to be inclined so that a bottom edge of the sphere is rotated along a rotating axis, The sludge may be dried by moving the sludge to the center or outer edge of the drying plate and then discharged through the falling groove even if the sludge is heated to a high temperature and rugged deformation occurs on the upper peripheral surface, To a sludge drying apparatus having an improved drying efficiency.

In recent years, the incidence of domestic sewage and industrial wastewater has also increased greatly due to various reasons such as economic development, population increase and improvement of living standard. Accordingly, the facilities of the wastewater treatment plant, which is the basic facility for improving water quality, are inevitably increasing to prevent water pollution in major rivers and rivers, and the amount of secondary wastewater sludge, which is a secondary byproduct, is gradually increasing.

For example, as of 2005, sludge production in Korea is 6.9 million tons per year, and most of them are being dumped or incinerated. As a result, the government is trying to raise the recycling rate of organic sludge to 70% on land by creating a law for the prohibition of marine dumping of organic sludge by 2011 by causing various problems such as environmental pollution.

Most of the above-mentioned sludge is formed in the form of a dewatered cake having a water content of 75 to 85%, and organic substances among the solid substances of the sludge except moisture are usually contained in a range of 40 to 80% within a wide range, It reaches up to 4,500 kcal / kg at 2,500 kcal / kg, and the sewage sludge thus generated is mostly treated by landfilling and marine dumping.

In addition, food waste that is discarded at the home or restaurant due to the development of the eating habits, foods that are discarded during the sale and distribution of food, garbage that is refined while food is being cooked at home and restaurants, food waste left after eating, The amount of daily garbage to be discarded is about 12,137 tonnes per year and about 4.1 million tonnes per year, reaching 1,400 tonnes by 8 ton trucks. The incidence of municipal waste in Korea decreased in the first half of 1995 Is gradually increasing again.

The garbage generated in such daily life is finally landfilled in the landfill after intermediate treatment such as recycling or coking. However, in the case of food waste, in the case of landfill treatment, it takes a lot of cost to secure the landfill site and to manage the after-treatment, for example, leachate and odor, and in the case of incineration, there is a high possibility that various harmful substances are discharged due to incomplete combustion I have a problem.

Such food wastes are subjected to a predetermined treatment process, and are mostly incinerated and buried in the state of removing water contained in the solid matter, dried and fermented, and then recycled as organic fertilizer or compost.

However, in the case of simple landfill, the landfill of sewage treatment plant sludge with a capacity of 10,000 tons / day or more is prohibited in accordance with the revision of the Enforcement Regulations of the Waste Management Act from July 2003. Thus, although the proportion of marine dumping is increasing, there is a concern that the marine ecosystem may be contaminated by eutrophication due to excessive organic matter, algae growth due to the introduction of a large amount of vegetative nutrients, and oxygen depletion, Korea entered into the London Convention on December 21, 1993, and entered into force on January 19, 1994. In particular, since 2004, Korea has been conducting the leaching test and the content test, The government has banned marine dumping by strengthening regulations such as changing the law. Incineration, which is considered as a sludge disposal method, also causes problems of air pollution due to secondary environmental pollutants as well as construction costs and operating costs of high incineration facilities, resulting in frequent complaints of nearby residents It is a very difficult situation to apply.

In order to solve the above problems, Korean Patent Registration No. 10-1070437 discloses a " centralized sludge drying device ", Korean Patent Registration No. 10-0894175 discloses "a sludge drying device "

The drying apparatus has a structure in which a drying plate is installed in a main body, the drying plate is heated by heat received from a heat source to dry the sludge, and the sludge is dropped to the bottom by the moving means and dried or discharged repeatedly , The sludge is retained on the drying plate and the water content is lowered, thereby improving the drying efficiency.

However, in the above drying apparatus, a dry plate made of a metal having excellent heat transfer efficiency is used. When hot steam or hot air is introduced into the dry plate and the dry plate is heated, the surface of the dry plate is uneven and finely rugged The sludge containing moisture deposited on the drying plate can not move along the moving means (for example, the moving orifice) or sticks to the surface of the drying plate as the surface of the drying plate becomes uneven A problem has occurred.

Disclosure of the Invention The present invention has been made to solve the above-mentioned problems, and it is an object of the present invention to provide a sludge-containing sludge- So as to solve the problem of sticking to the surface of the plate.

For this purpose, the present invention provides a sludge drying apparatus comprising: a drying plate for heating sludge; A rotating shaft installed vertically at the center of the drying plate and rotated by receiving power from the motor; A plurality of moving parts coupled to the rotating shaft and rotated together with the rotating shaft so as to be inclined at regular intervals so as to gradually move the sludge supplied to the drying plate to the center part or the outer part of the drying plate, One or more scrapers in a direction; And a falling groove formed at a center portion or an outer edge portion of the drying plate so that the sludge moved to the center portion or the outer edge portion of the drying plate by the moving means can be dropped to the lower end, So that the sludge is heated to a high temperature so that the sludge is heated to a high temperature to cause the sludge to be deformed on the upper surface of the drying plate And the sludge is prevented from adhering to the surface of the drying plate or staying on the drying plate.

In addition, on the outer circumferential surface of the drying plate according to the present invention, a belt-shaped casing having a fastening portion for assembling the drying plate in a multi-stage can be formed, and the rotary shaft can be coupled and separated in upper and lower multi- , The drying plate is sequentially installed from the bottom to the top, and then the rotating shaft of each drying plate and the casing are coupled to each other to be assembled into multiple layers.

In addition, in the present invention, the falling groove has a first falling groove or a sharp mesh net in which the entire sludge is dropped to the lower end, and the sludge having large particles among the sludge is crushed and dropped to the lower end to decrease the water content And a second falling groove for guiding the second falling groove.

According to the present invention as described above, the moving port is hinged to the scraper via the rotating bar, so that the bottom edge is rotated along the rotating shaft while keeping the bottom edge in contact with the outer circumferential surface of the drying plate, The sludge charged on the drying plate can be smoothly moved to the center portion or the outer edge side of the drying plate and then discharged through the dropping groove.

Further, the drying apparatus can be installed by adjusting the height according to the site conditions, and as the height is increased, the time for which the sludge stays on the drying plate is increased, so that the drying efficiency is improved.

If necessary, a sharp mesh of a sharp material is selectively formed in the dropping groove, so that the coarse sludge is cut into fine particles and discharged to the dry plate at the lower end, so that the sludge having coarse particles is dried only on the outer circumference, It can be prevented from being discharged in a state in which it is not possible.

1 is a schematic illustration of a sludge drying apparatus for increasing drying efficiency according to the present invention.
Figs. 2 to 3 are views showing an example in which a moving tool according to the present invention is coupled to a scraper. Fig.
4 is a view for explaining a process in which a drying plate according to the present invention is coupled to upper and lower ends.
5 is an exemplary view for explaining a falling groove according to the present invention;

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, a sludge drying apparatus for increasing drying efficiency according to the present invention will be described in detail with reference to the accompanying drawings.

FIG. 1 is a view for explaining a sludge drying apparatus having increased drying efficiency according to the present invention, which comprises a drying plate 100 for heating sludge; A rotating shaft 200 vertically installed at the center of the drying plate and rotated by receiving power from the motor M; A plurality of moving tools 310 coupled to the rotating shaft and coupled with the rotating shaft so as to be inclined at a predetermined interval so as to gradually move the sludge supplied to the drying plate to the center or outer edge of the drying plate, At least one scraper 300 in the radial direction; And a dropping groove 110 formed at the center or outer edge of the drying plate so that the sludge moved to the center or outer edge of the drying plate by the moving means can be dropped to the bottom.

A space is formed in the drying plate 100, and heat supplied from an external heat source 101 is introduced into the inside of the drying plate 100 to heat the introduced sludge to evaporate moisture contained in the sludge.

The drying plate 100 is preferably made of a metal material in order to secure thermal conductivity and durability. When hot heat is continuously supplied to the inside of the drying plate, the drying plate is heated to finely bump the outer peripheral surface of the top of the drying plate A deformation occurs. For example, when the moving tool 310 is moved in a convexly deformed portion, the space between the moving tool and the drying plate is relatively narrow as compared with the space in which the deformation has not occurred, so that the sludge is broken, And the force is applied to the moving gate or the scraper, so that the durability is degraded and breakage may occur.

Next, referring to FIGS. 2 to 3, the moving tool 310 according to the present invention is slantingly engaged with the scrapers at regular intervals. When the scrapers are rotated in a state where the plurality of moving ports are installed at the same inclination, the sludge gradually moves toward the center portion or the outer edge portion of the drying plate by the moving tool.

Further, the moving means is coupled to the pivot bar 320 in a shape inclined at a predetermined angle (for example, a plow or a plow). When the motor M rotates in a clockwise direction, the sludge injected onto the drying plate moves to the inner circumferential surface of the moving tool 310 while the moving tool 310 is moved. In contrast, when the motor rotates counterclockwise The sludge is pushed and moved on the outer peripheral surface of the moving port.

The moving tool 310 is inclined to the turning bar 320 hinged to the scraper 300 so that the bottom edge of the moving tool 310 contacts the surface of the drying plate 100, The sludge can be smoothly moved even if deformation occurs on the surface of the drying plate 100 because the drying plate 100 is rotated along the rotating shaft 200. For example, when the moving tool 310 passes through the convexly deformed portion on the drying plate 100, the moving tool 310 rises along the deformed surface and then comes down to the original state by the load, It is possible to prevent the sludge from sticking or breaking on the surface of the dry plate and to prevent the durability from being deteriorated or broken due to the force applied to the moving sphere or the scraper.

4, a belt-shaped casing 400 having a fastening part 410 is formed on the outer circumferential surface of the drying plate 100 according to the present invention so that the drying plate can be assembled in multiple stages. And the rotary shaft 200 is configured to be able to be coupled and separated into upper and lower ends.

The casing (400) is coupled along the outer circumferential surface of the drying plate (100) and serves as a guide to prevent the sludge charged therein from being lost to the outside. The casing (400) is formed to have a predetermined thickness to protect the drying plate And is made of a metal material having excellent strength.

The fastening part 410 is bent outward at the upper and lower ends of the casing and has a cross-section of "C" or "C". The bottom surface of the fastening part 410 is bolted to the upper casing and the lower casing. A plurality of fastening holes 420 are formed.

The rotation shaft 200 has a fitting portion 210 having a predetermined diameter protruded from an upper end thereof and a fitting groove 220 having a shape corresponding to the fitting portion is formed inwardly at a lower end thereof.

The drying plate 100 is sequentially raised from the lower part to the upper part and then the coupling part 410 and the rotary shaft 200 of each casing 400 are coupled to form a sludge drying device having a plurality of layers in upper and lower stages can do.

When the rotation shaft is coupled with the rotation shaft, the fitting portion 210 of the rotation shaft located at the lower portion is fitted into the fitting groove 220 of the rotation shaft located at the upper portion. When power is transmitted from the motor M, Can be rotated at the same time.

The positions of the drop grooves 110 are alternately provided at the center and the outer edge of the dry plate 100 so that the sludge is once dropped into the drop grooves formed at the center of the dry plate, So that the drying efficiency can be further increased by allowing the sludge to stay in the drying plate for a long time.

Referring to FIG. 5, the falling groove according to the present invention includes a first dropping groove 111 or a sharp mesh 113, which is opened to allow the sludge to fall down to the lower end, And a second dropping groove 112 for dropping the large sludge to the bottom and decreasing the water content. The first and second drop grooves may be provided individually or simultaneously on the drying plate.

The second dropping groove 112 is opened at one side with respect to the center and a sharp mesh 113 is provided at the other side. When the sludge having large particles reaches the second drop 112 groove, And then falls to the lower end.

Among the sludge supplied to the drying plate, the sludge having a small particle size is dried uniformly inside and outside, but in the case of a large particle sludge, the outside is dried but the sludge can be dropped to the bottom or discharged to the outside while containing moisture. Therefore, it is possible to increase the drying efficiency of the sludge by crushing large sludge particles through the net 113 and dropping onto the dry plate at the lower end.

According to the present invention as described above, the moving port is hinged to the scraper through the pivot bar so that the sludge can be smoothly moved even when the surface of the drying plate is ruggedly deformed, The sludge having a large particle size is dried only by drying the outer circumferential surface of the sludge, and the inner sludge is discharged into the drying plate at the lower end while being cut into fine particles. The water can be prevented from being discharged in a state where it is not dried.

100: drying plate 110: falling groove
111: first falling groove 112: second falling groove
113: Network
200: rotating shaft 210:
220: Fitting groove
300: scraper 310: moving rod
320: Rotating bar
400: casing 410: fastening portion
420: fastening ball
M: Motor

Claims

A drying plate (100) for heating the sludge;
A rotating shaft 200 vertically installed at the center of the drying plate and rotated by receiving power from the motor;
A plurality of moving tools 310 coupled to the rotating shaft and coupled with the rotating shaft so as to be inclined at a predetermined interval so as to gradually move the sludge supplied to the drying plate to the center or outer edge of the drying plate, At least one scraper 300 in the radial direction;
And a dropping groove (400) formed at the center or an outer edge of the drying plate so that the sludge moved to the center or outer edge of the drying plate by the moving port can be dropped to the bottom,
The moving tool 310 is coupled to the turning bar 320 hinged to the scraper 300 so that the bottom edge of the moving tool 310 is rotated along the rotating shaft while being in contact with the surface of the drying plate. So that the sludge can be dried while moving to the center or outer edge of the drying plate and then discharged through the dropping groove, and when the sludge drifts on the surface of the drying plate Wherein the drying of the sludge is carried out by the drying device.

The method according to claim 1,
The casing includes a casing having a fastening portion for fastening the drying plate in a multi-stage manner to the outer circumference of the drying plate,
The rotary shaft is configured to be able to be coupled and separated into upper and lower ends,
Wherein the drying plate is installed sequentially from the lower part to the upper part, and then the rotary shaft of each drying plate is combined with the casing to be assembled into multiple layers.

[3] The apparatus according to claim 1 or 2, wherein the dropping groove is provided with a first dropping groove or a sharp material net in which the sludge is entirely opened and dropped into the lower end, and the sludge having large particles among the charged sludge is crushed, And a second falling groove for dropping the water content and decreasing the moisture content.