WO2004044491A1

WO2004044491A1 - Incineration and drying equipment of complex waste material

Info

Publication number: WO2004044491A1
Application number: PCT/KR2003/000739
Authority: WO
Inventors: Kyung Sup Kim; Myung Hee Ma
Original assignee: Bosung Development Inc.
Priority date: 2002-11-14
Filing date: 2003-04-12
Publication date: 2004-05-27
Also published as: AU2003222463A1; KR20040042921A; KR100514663B1

Abstract

The present invention relates to a complex waste incineration and drying apparatus for drying wastes containing a high water content such as sludge by using heat generated from burning up various kinds of industrial or living wastes.

Description

INCINERATION AND DRYING EQUIPMENT OF COMPLEX

WASTE MATERIAL

BACKGROUND OF THE INVENTION

1. Field of the Invention:

The present invention relates to a complex waste incinerating and drying apparatus. More particularly, the present invention relates to a complex waste incinerating and drying apparatus for drying various wastes having a high water content such as sludge or scran, etc. by using heat generated from incinerating various kinds of complex wastes such as industrial wastes or living wastes.

2. Description of the Prior Art:

It is a factor of an environmental pollution such as a ground pollution to bury wastes having a high water content such as scran or sludge, etc. without processing thereof. Therefore, sludge, etc. dried by heating and drying wastes having high water contents should be used as recyclable members, and dried scran should be used as fertilizers or feedstuffs, etc.

Therefore, since fuels should be consumed in order to dry wastes having a high water content, fuel cost can be a overburden, that is, there is a problem that the processing cost for wastes is burdensome. In order to solve the above problem, the present applicant has suggested Korean Patent Application No. 2000-0006010 (title; Complex Waste Incinerating and Drying Apparatus), which is illustrated in Figs. 1 and 2 of this specification.

According to the above application, a complex waste incinerating and drying apparatus 100 comprises a fixed quantity input unit 101 for inputting wastes in a fixed quantity unit into a combustion chamber 103, an combustion unit 102 provided under the combustion chamber 103 to burn up the wastes supplied from the fixed quantity input unit 101, a re-combustion burner 104 for burning up again combustion gases discharged from the combustion chamber 103, a re-combustion chamber 105 into which fumes from the re- combustion burner 104 are emitted, a dry drum 106 connected to an outlet of the re-combustion chamber 105 to be rotated with an inclined posture, a crusher 110 for crushing and supplying wastes having a high water content to the dry drum 106, an impeller 109 provided in the dry drum 106 and rotationally fixed to a central axis 108, and a locking pin 107 provided at an inner circumferential portion of the dry drum 106 to generate a drop shock.

In the complex waste incinerating and drying apparatus 100, a variety of combustible industrial or living wastes such as polyethylene substances, polypropylene substances, synthetic resin wastes, fiber remnants, papers, etc. are transferred to the combustion unit 102 from the fixed quantity input unit 101 and burned up in the combustion unit 102, the resultant combustion gases are transferred to the re-combustion chamber 105 from the combustion chamber 103 and burned up again, so that pollution materials are almost removed, and then air heated through the re-combustion and wastes having a high water content such as sludge, scran, etc. crushed by the crusher 110 are input into the dry drum 106.

Such wastes are raised by the locking pin 107 of the dry drum 106, and then collide with the impeller 109 rotating while being dropped from the highest position. As a result, since the wastes are crushed again, the wastes are exposed uniformly to the high-temperature air, thereby efficiently drying the wastes.

Therefore, it is possible to effectively perform processes of drying and crushing the wastes having a high water content without a burden of huge fuel cost by using the heat obtained from incineration of the combustible wastes and the high-temperature exhaust gases obtained from re-incineration by the re-combustion burner with little apprehension of environmental pollution.

However, since the complex waste incinerating and drying apparatus 100 simply supplies the air heated in the re-combustion chamber 105 to the dry drum 106, the heated air can not spread uniformly in the dry drum 106, and an air current cannot be formed in the advancing direction of wastes in the dry drum 106, so that the apparatus 100 cannot dry completely the wastes having a high water content and thus waste water is generated from the wastes not dried completely. In addition, since the dry drum 106 should be provided obliquely to transfer the wastes within the dry drum 106, the establishment work of the dry drum is inconvenient, thereby increasing the cost. SUMMARY OF THE INVENTION

The present invention is contrived to solve the above problems, and it is thus an object of the present invention to provide a complex waste incinerating and drying apparatus capable of completely and rapidly drying wastes having a high water content, by allowing an air current to be formed in an advancing direction of the wastes and heated air to spread uniformly within a dry drum.

According to an aspect of the present invention, there is provided a complex waste incinerating and drying system, wherein a diffuser plate for diffusively supplying air heated through incinerating combustible wastes is provided at an inlet side of a dry drum, positional angles of a plurality of blades formed at a fixing ring of an impeller are different from each other, and the adjacent blades of the fixing ring have different deviations.

Therefore, according to the present invention, the heated air is diffused uniformly in the dry drum, and an air current is formed in an advancing direction of the wastes, so that the wastes having a high water content can be dried completely and rapidly. In addition, without obliquely providing the dry drum, the wastes can be transferred smoothly.

BRIEF DESCRIPTION OF THE DRAWINGS

The aforementioned aspects and other features of the present invention will be apparent from the following description taken in conjunction with the accompanying drawings, wherein: Fig. 1 is a diagram illustrating a conventional complex waste incinerating and drying apparatus;

Fig. 2 is a cross-sectional view illustrating a dry drum of the conventional complex waste incinerating and drying apparatus;

Fig. 3 is a diagram illustrating an impeller provided at a hot blast dryer;

Fig. 4 is a diagram illustrating a complex waste incinerating and drying apparatus according to the present invention;

Fig. 5 is a perspective view illustrating an impeller of the complex waste incinerating and drying apparatus according to the present invention;

Fig. 6 is a diagram illustrating a configuration of the impeller of the complex waste incinerating and drying apparatus according to the present invention;

Fig. 7 is a diagram schematically illustrating a configuration of the dry drum;

Fig. 8 is a diagram schematically illustrating a configuration including a diffuser plate; and

Fig. 9 is a diagram illustrating a configuration of a combustion chamber.

REFERENCE NUMERALS

10: incinerating and drying apparatus 11 : fixed quantity input unit 12: hopper 13: motor

14: transfer screw

15: combustion chamber

16 : combustion unit

17: re-combustion burner

18 : re-combustion chamber

19: dry drum

20: locking pin

21 : central axis

22: impeller

23: blade

24: element

25: diffuser plate

26: crusher

27: cyclone

DETAILED DESCRIPTION OF PREFERRED EMBODIMENTS

The present invention will be described in detail by way of preferred embodiments with reference to the accompanying drawings in which like reference numerals are used to identify like or similar elements.

Fig. 4 is a diagram illustrating a complex waste incinerating and drying apparatus according to the present invention, Fig. 5 is a perspective view illustrating an impeller of the complex waste incinerating and drying apparatus according to the present invention, Fig. 6 is an explanatory diagram illustrating a configuration of the impeller of the complex waste incinerating and drying apparatus according to the present invention, Fig. 7 is a diagram schematically illustrating a configuration of a dry drum, Fig. 8 is a diagram schematically illustrating a configuration including a diffuser plate; and Fig. 9 is a diagram illustrating a configuration of a combustion chamber.

The present invention comprises a fixed quantity input unit 11 for inputting a fixed quantity of combustible wastes of industrial or living wastes such as polyethylene wastes, polypropylene wastes, synthetic resin wastes, fiber remnants, papers, etc. into a combustion chamber 15, a fuel and intermittent air emitting means 30 provided under the combustion chamber 15, for supplying fuels and intermittent high-pressure air to the fixed quantity of wastes input to incinerate the wastes supplied from the fixed quantity input unit 11, a selection valve 31 for selectively supplying the fuels and the air to the fuel and intermittent air emitting means 30, a fuel supply means 32 comprising a fuel tank 33 and a fuel pump 34 to press and supply the fuels thereto, a pneumatic supply means 35 comprising a compressor 36 and a reserve tank 37 to supply air of more than certain pressure thereto, a pressure valve 38 for controlling pressure of the air supplied from the pneumatic supply means 35, an air preheating chamber 28 provided around the combustion chamber 15, and air jet holes 29 provided at one side of the air preheating chamber 28.

Further, the present invention further comprises a re-combustion burner 17 for burning up again combustion gases having been burned up in the combustion chamber 15, and a re-combustion chamber 18 into which fumes from the re-combustion burner 17 are emitted, a dry drum 19 for introducing the air heated in the re-combustion chamber 18, a crusher 26 for crushing and supplying the wastes having a high water content to the dry drum 19, and locking pins 20 provided at an inner circumferential portion of the dry drum 19 to give a drop shock.

Further, a diffuser plate for diffusing the heated air is fixed with a slope of about 4° to 6° to the inlet side of the dry drum 19, an impeller 22 is provided in the dry drum 19 in which one or more blades 23 are formed at fixing rings 22' rotationally fixed to a central axis 21 of the impeller 22, and a plurality of elements 24 are protruded from the blades 23. Here, the blades 23 have positions different from each other within a range of 0° to 30° and the elements 24 have the same angles as the positional angles of the blades 23.

Also, the positional angles of blades 23 formed at a plurality of fixing rings 22' fixed to the central axis 21 are different from each other, where deviations thereof fall within a range of about 4° to 6°, more preferably 5°.

That is, the positional angles of the blades 23 of the adjacent fixing rings 22' should be different from each other such that, for example, if a positional angle of the blade 23 of a first fixing ring 22' is 0°, a positional angle of the blade 23 of a second fixing ring 22' is 5°, a positional angle of the blade 23 of a third fixing ring 22' is 10°, a positional angle of the blade 23 of a fourth fixing ring 22' is 15°, etc. Further, the central axis 21 is provided eccentrically to left or right from the center of the dry drum 19, and a cyclone 27 for separating suspended solids and the air passing through the dry drum 19 each other is provided therein.

In the present invention having the above configuration, if a motor 13 of the fixed quantity input unit 11 is first turned on and combustible wastes are collected and input to a hopper 12, the above wastes are cut and transferred in a predetermined length unit by means of a transfer screw 14 rotating by the motor 13, and are filled and incinerated in the combustion unit 16. Here, the heated air is circulated and raised in the combustion chamber 15.

That is, if wastes are filled in the combustion unit 16, the selection valve 31 operates to activate the fuel supply means 32, and then fuels required for an initial ignition are supplied to the air jet holes 29 of the fuel and intermittent air emitting means 30 through the selection valve 31. In this state, an operator's ignition with a known ignition means starts incineration of wastes. At this time, the selection valve 31 is cut off, and from this time, a self combustion process of the wastes is continued.

Furthermore, a general blower (not shown) is operated for supplying combustion air, and the air pressed and transferred by the blower is supplied to the air preheating chamber 28 and ejected from the air injection holes 29. Therefore, inner walls of the combustion chamber 15 are heated due to wastes to be currently incinerated, and thus the combustion air filled between the inner walls of the combustion chamber 15 is also heated. That is, since the combustion air to be used for incinerating the wastes is supplied in a heated state, the incineration efficiency is improved, and since the combustion air is collided with the opposite inner wall of the combustion chamber 15 and raised, the combustion air is raised naturally in a helical shape.

On the other hand, since ashes left after incineration of the wastes cover the wastes continuously supplied by means of a transfer screw 14, smooth supply of the combustion air may be blocked, and thus an incomplete combustion condition may be caused. In this case, air is accumulated in the reserve tank 37 by means of the compressor 36 of the pneumatic supply means 35 to increase the air pressure, and thus such increased pressure is applied to the pressure valve 38. Then, when the air pressure exceeds a predetermined pressure, the pressure valve 38 is opened, the high-pressure air is momentarily discharged into the fuel and intermittent air emitting means 30 through the selection valve 31. Therefore, ashes having covered the wastes are momentarily raised, rotated together with the combustion air and incinerated again. That is, ashes having covered the wastes are removed to improve the combustion condition.

Furthermore, since the air heated through incinerating the wastes is supplied from the combustion chamber 15 to the re-combustion chamber 18, and the air is burned up again by the re-combustion burner 17 in the re- combustion chamber 18, air pollution materials included in the heated air can be completely incinerated to prevent environmental pollution and to emit a high-temperature heat. A high-temperature air heated again in the re-combustion chamber 18 is supplied into the dry drum 19, and the heated air is collided with the diffuser plate 25 provided at an inlet side of the dry drum 19 and spread uniformly in the dry drum 19.

On the other hand, wet wastes having a high water content such as sludge, scran, etc. are input to the crusher 26, and crushed into adequate sizes, dropped and input into the dry drum 19. Therefore, the wet wastes are dried by means of the high-temperature air heated through re-combustion in the re- combustion chamber 18. Particularly, the wastes are raised by the locking pin 20 of the dry drum 19, then dropped from the highest position, collided with the blades 23 of the impeller 22, and crushed again, so that the crushed wastes are uniformly exposed to the high-temperature air and thus can be dried efficiently.

That is, at the blades 23 of the impeller 22, the elements 24 for impacting the dropped wastes are formed, and the dropped wastes are crushed and fractionized by means of the elements 24, thereby improving a dry efficiency.

Also, since the plural blades 23 are provided at positions different from each other, and the positional angles of the blades 23 in the adjacent fixing rings 22' are different from each other, the air current is formed in the dry drum 19 and the crushed wastes are transferred by means of rotation of the impeller 22. Therefore, since the heated air introduced into the dry drum 19 is diffused uniformly in the dry drum 19, and the wastes are transferred to the backside, the wastes having a high water content can be dried completely and rapidly.

Then, the completely dried wastes are discharged externally through an exit, other suspended solids and the air are introduced into the cyclone 27, where large suspended solids are dropped and discharged as dried wastes, and fine suspended solids and the air pass through a dust collector (not shown), thereby externally discharging only clean air.

As mentioned above, according to the present invention, the wastes having a high water content can be dried and crushed by means of the heat obtained from combustion of the combustible wastes and the high-temperature exhaust gases obtained from re-combustion in the re-combustion burner and having little apprehension of environmental pollution, thereby effectively processing the wastes having a high water content.

INDUSTRIAL USABILITY As mentioned above, according to the present invention, the diffuser plate for diffusively supplying the air heated through incinerating the combustible wastes is provided at the inlet side of the dry drum, the blades formed at the fixing rings are positioned differently from each other, and the blades in adjacent fixing rings have different deviations. As a result, since the heated air is diffusively supplied to the inside of the dry drum, and the air current is formed in the dry drum, the wastes having a high water content are rapidly dried not to generate the waste water. In addition, without providing the dry drum obliquely, the wastes can be transferred, so that it is possible to easily install the apparatus and thus to reduce its cost.

Claims

WHAT IS CLAIMED IS:

1. A complex waste incinerating and drying apparatus comprising a fixed quantity input unit 11 for inputting a fixed quantity of wastes into a combustion chamber 15, the combustion chamber 15 for incinerating the wastes supplied from the fixed quantity input unit 11, a dry drum 19 for inputting wastes having a high water content and air heated in the combustion chamber 15, and an impeller 22 provided with a plurality of elements 24 protruded from a pair of blades 23 and rotationally fixed to a central axis 21 of the dry drum 19, wherein one or more blades 23 are formed at fixing rings 22' of the impeller 22.

2. The complex waste incinerating and drying apparatus according to claim 1, wherein positional angles of the blades 23 formed in the fixing rings 22' fall within a range of 0° to 40°.

3. The complex waste incinerating and drying apparatus according to claim 1, wherein a deviation of the positional angles of the blades 23 in the fixing rings 22' falls within a range of 4° to 6°.

4. The complex waste incinerating and drying apparatus according to claim 1, wherein the central axis 21 to which the fixing rings 22' are fixed is provided eccentrically to left or right of the center of the dry drum 19.

5. The complex waste incinerating and drying apparatus according to claim 1, wherein a diffuser plate 25 is provided at an inlet of the dry drum 19 into which heated air is introduced.

6. The complex waste incinerating and drying apparatus according to claim 1, further comprising a fuel and intermittent air emitting means 30 provided under the combustion chamber 15, for supplying high-pressure intermittent air and fuels for ignition to the wastes to be input in a fixed quantity unit; a selection valve 31 for selectively supplying the fuels and the air to the fuel and intemiittent air emitting means 30; a fuel supply means 32 comprising a fuel tank 33 and a fuel pump 34 for pressing and supplying fuels thereto; a pneumatic supply means 35 comprising a compressor 36 and a reserve tank 37 for supplying more than a predeteraiined pressure of air thereto; a pressure valve 38 for controlling a pressure of the air supplied from the pneumatic supply means 35; an air preheating chamber 28 provided around the combustion chamber 15; and an air jet hole 29 provided at one side of the air preheating chamber 28.

7. The complex waste incinerating and drying apparatus according to claim 1, further comprising a re-combustion burner 17 for burning up again combustion gases discharged from the combustion chamber 15, and a re- combustion chamber 18 into which fumes from the re-combustion burner 17 are emitted.

8. The complex waste incinerating and drying apparatus according to claim 1, wherein locking pins 20 are provided at an inner circumferential portion of the dry drum 19 to give a drop shock to the wastes having a high water content.

9. The complex waste incinerating and drying apparatus according to claim 1, further comprising a crusher 26 for crushing and supplying the wastes having a high water content to the dry drum 19.

10. The complex waste incinerating and drying apparatus according to claim 1 or 2, wherein elements 24 are formed to have the same angles as the positional angles of the blades 23.

11. The complex waste incinerating and drying apparatus according to claim 4, wherein the diffuser plate 25 has a slope of 4° to 6°.