JPH0639003A - Industrial waste sterilizing and heat treating machine - Google Patents

Abstract

PURPOSE:To efficiently treat waste, such as waste building materials, without generating secondary pollution by the outer periphery of a rotary kiln turnably enclosed in a heat exchange chamber connected via a hot air pipe from an incineration furnace with hot air stirring vanes having an angle of inclination with the longitudinal direction of the rotary kiln. CONSTITUTION:The outer periphery of the rotary drum-shaped rotary kiln 1 turnably enclosed in the heat exchange chamber 6 connected via the hot air pipe 7 successively provided from the incineration furnace 4 is provided with the hot air stirring vanes 20 so as to have the angle of inclination with the longitudinal direction of the rotary kiln 1. The bottom end at the tail of the heat exchange chamber 6 is provided with an ash taking-out port 23. A secondary gas feed cylinder 25 for taking in the hot exhaust gases, etc., from a waste passage 21 and a special pulverizing machine 24 is provided in the middle of the hot air pipe 7. Further, a heat resistant hot plate 26 having wide gaps 27, such as large holes, in which the hot air passes, and many small holes 28 connected at a right angle or sharp angle to the gaps 27 is provided in the middle of the hot air pipe 7. A smoke discharge cylinder 29 is provided between the rotary kiln 1 and a cyclone 14.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an improvement in a plant for processing industrial waste (hereinafter simply referred to as waste) such as construction waste generated in the construction of buildings or structures.

[0002]

2. Description of the Related Art Waste materials such as construction waste materials include hard materials such as concrete, soft materials such as wood and plastic sheets, and mixtures thereof. It is also a mixture of flammable, non-combustible and flame-retardant. These mixtures may also contain harmful bacteria. In order to reuse these as stable wastes or resources, it is not efficient to perform only selection or incineration, and it is also incomplete in atomizing soft matter.

In the case of a mixture of construction waste materials and the like, it is effective to melt and solidify or carbonize and then pulverize the mixture as a means for making the plastic sheet finer. However, if hot air is directly applied to the treated material, The heated exhaust gas contained a lot of harmful gases due to combustion of dust and plastics, and there was an economical or technical difficulty in removing them. Even with the indirect heating method, incomplete combustion of combusted materials and auxiliary burners included dust, smoke, and bad odor in the hot air exhaust, and the thermal efficiency was low.

[0004]

[Problems to be Solved by the Invention] In order to efficiently process waste such as construction waste, which is a mixture of combustible, non-combustible, and flame-retardant, without causing secondary pollution, heat efficiency such as heat exchange and complete combustion can be improved. In addition to increasing the amount, we will try to improve the collection process for dust, smoke, and odors.

[0005]

A concrete example of the present invention will be described with reference to the drawings. As an example of an industrial waste treatment plant for construction waste materials, as an example, a roughly combustible material such as wood or paper after rough screening or coarse crushing is selected. On the outer periphery of a rotary drum-shaped rotary kiln (1) rotatably enclosed in a heat exchange chamber (6) connected via a hot air pipe (7) connected in series from an incinerator (4) for burning things, Hot air stirring blades (22) so that there is an inclination angle with respect to the length direction of the rotary kiln (1)
To provide. The inclination angle is viewed from the rotation direction, and the heat exchange chamber (6)
The side closer to the entrance of the is advanced and the side closer to the end is delayed, and the side opposite to the feed blade (13) is provided.

At the bottom end of the heat exchange chamber (6), an ash outlet (2) is provided so that it can be opened and closed or pulled out.
3) is provided.

In the middle of the hot air pipe (7), a waste passage (2
A secondary supply cylinder (25) is provided for taking in hot exhaust gas from 1) or a special crusher (24).

Heat resistance provided with a wide air gap (27) such as a large hole through which hot air passes and a large number of small air holes (28) connected to the wide air gap (27) at a right angle or an acute angle in the middle of the hot air pipe (7). A heating plate (26) is provided.

Rotary kiln (1) and Sacron (1)
A smoke exhaust pipe (29) for inhaling smoke and dust from the rotary kiln (1) is provided so as to be connected to the upper part of the inclined portion of the heating waste input port (9) in the middle of 4).

[0010]

EXAMPLE The clearance between the outer end of the hot air stirring blade (22) and the inner wall of the heat exchange chamber (6) is large when dust contained in the hot air such as ash is accumulated in the heat exchange chamber (6).
If you want to force discharge, make it smaller.

When dust contained in hot air such as ash is deposited in the heat exchange chamber (6), a recess or groove may be provided in the lower portion of the heat exchange chamber (6) in the longitudinal direction.

The special crusher (24) is installed in a closed soundproof structure in order to collect heat emitted from waste and shield noise.

The secondary supply cylinder (25) has a waste passage (2
In addition to hot exhaust from 1) or a special crusher (24), fresh outside air may be taken in.

The structure of the hot plate (26) is, for example, as shown in FIG. 3, a wide space (27) through which hot air passes is formed as a large hole in the center, and both ends of the outer diameter are closely fixed to each other by matching the inner diameter of the hot air tube (7). In addition to making it possible, it is advisable to dent the middle of the outer diameter to take in hot exhaust air or fresh outside air from the secondary supply cylinder (25) and to supply secondary air to the hot air through a large number of small holes (28).

The smoke stack (29) may naturally suck in smoke and dust from the rotary kiln (1) by negative pressure in the exhaust passage (5), but a small burner (30) is further provided for additional combustion. Good.

[0016]

[Function] When combustible waste such as roughly selected wood and paper is burned in the incinerator (4), the high-temperature exhaust gas is further heated by the large burner (31) and heated through the hot air tube (7). Enter the exchange room (6) and rotate the rotary kiln (1)
After being heated, the dust passes through the exhaust passage (5) to remove dust with a SACRON in the middle and is discharged from the chimney (12).

The hot air stirring blades (22) are provided in the heat exchange chamber (6).
The hot air inside is agitated and circulated to conduct the heat to the rotary kiln (1), and the dust contained in the hot air such as ash accumulated in the heat exchange chamber (6) is removed from the ash outlet (2).
Push out to 3). When the clearance between the outer end of the hot air stirring blade (22) and the inner wall of the heat exchange chamber (6) is small, the accumulated dust is also stirred and forcedly discharged together with the hot air. If the heat exchange chamber (6) has a recess or groove at the bottom, the accumulated dust is likely to be collected, and it is convenient to take out the deposit from the ash extraction port (23).

Incomplete combustion can be prevented by sending more air into the hot air tube (7) by the secondary supply cylinder (25). In this case, the waste passage (21) and the special crusher (2
If hot exhaust air from 4) is taken in, the exhaust heat can be effectively used to raise the temperature of the hot air.

When the hot plate (26) is in the middle of the hot air tube (7), it is burnt by the hot air passing therethrough, and its catalytic presence causes the hot air to be further completely burned. In this case, a large number of small holes (2
If the air is dispersed from 8) and supplied substantially evenly, the combustion efficiency is further increased.

The smoke exhaust pipe (29) sucks smoke and dust flowing back from the rotary kiln (1) to the heating waste input port (9) due to the negative pressure of the exhaust passage (5) connecting part, and introduces it into the exhaust passage (5). Join. In this case, when smoke or dust is burned by the small burner (30), harmful gas and odor can be reduced. If the sacron (14) is provided in the middle of the exhaust passage (5), a considerable part of dust falls. In addition, fine dust, etc. can be collected by known means such as water flow to prevent harmful gas, bad odor,
Leakage of dust can be prevented.

Waste to be heated, such as concrete and plastic sheets, is fed into the rotary kiln (1) from the heating waste input port (9) by a conveyor or the like. As the rotary kiln (1) rotates, it is heated with stirring by the feed blades (13), and is sent in the direction opposite to the hot air while being melted, solidified, carbonized, or sterilized,
From the exit of the rotary kiln (1) to the waste passage (21)
It is discharged to a special crusher (24), crushed, and then conveyed to a predetermined place by a conveyor or the like as treated.

[0022]

[Effect] According to the present invention, the fifth item of industrial waste which is troublesome to process because hard materials such as concrete, soft materials such as wood and plastic sheets and combustible materials and incombustible materials and flame retardant materials are mixed. As for the above, the combustible material contained is used as a heat source to improve the thermal efficiency even by the indirect heating method, and the dust and organic gas of the processed material may not be scattered into the atmosphere and may cause secondary pollution. In addition, a large amount of waste can be physically and chemically stabilized and rendered harmless, and can be easily reused as stable waste or resources.

[Brief description of drawings]

FIG. 1 is a side sectional view showing an outline of the present invention,

FIG. 2 is a front sectional view of A-A ′,

FIG. 3 is a perspective view showing an example of the shape of a hot plate.

[Explanation of symbols]

 1 Rotary Kiln 2 Combustible Waste Inlet 3 Combustion Blower 4 Incinerator 5 Exhaust Passage 6 Heat Exchange Room 7 Hot Air Tube 8 Belt Conveyor 9 Heating Waste Inlet 10 Temperature Sensor 11 Guide Roller 12 Chimney 13 Feed Blade 14 SACRON 15 Air blower 16 Cooling air intake 17 Arrow showing combustion air flow 18 Arrow showing waste flow 19 Arrow showing hot air flow 20 Stand 21 Waste passage 22 Hot air agitation blade 23 Ash extraction port 24 Special crushing Machine 25 Secondary cylinder 26 Hot plate 27 Wide void 28 Small hole 29 Smoke stack 30 Small burner 31 Large burner

Claims (5)

[Claims] 1. An incinerator (4) to a hot air tube (7) in an industrial waste treatment plant for heating, sterilizing, melting, solidifying or carbonizing construction waste material that has been roughly selected or roughly crushed.
The rotary kiln (1) rotatably surrounded in the heat exchange chamber (6) connected via the hot-air stirring blades has an inclination angle with respect to the longitudinal direction of the rotary kiln (1). Industrial waste sterilization heat treatment machine provided with a plate (22). 2. The heat treatment machine for sterilizing industrial waste according to claim 1, wherein an ash outlet (23) is provided at the bottom end of the heat exchange chamber (6). 3. A waste passage (2) is provided in the middle of the hot air tube (7).
The industrial waste sterilization heat treatment machine according to claim 1 or 2, further comprising: a secondary supply cylinder (25) for taking in hot exhaust gas from 1) or a special crusher (24). 4. A heat-resistant device having a large air gap (27) such as a large hole through which hot air passes and a large number of small holes (28) connected to the wide air gap (27) at a right angle or an acute angle in the middle of the hot air tube (7). The heat treatment machine for sterilizing industrial waste according to claim 1, wherein a heat plate (26) having heat resistance is provided. 5. A rotary kiln (1) and a Sacron (1)
5. The industrial waste sterilization heat treatment machine according to claim 1, wherein a smoke exhaust pipe (29) for sucking smoke and dust from the rotary kiln (1) is provided in the middle of the heat treatment device (4).