JPS5814922A - Apparatus for removing molten or precipitated substance - Google Patents

Abstract

PURPOSE:To provide the titled apparatus which is small in size, has not fear of generating the clogging of a gas passage and is easily fabricated, obtained by constituting the same so as to impinge an exhaust gas to a rotary disc having a cooling surface almost at right angles to make it possible to remove a molten substance or a precipitated substance accompanied by the gas in good efficiency. CONSTITUTION:A hollow rotary disc 16 is provided in a casing 12 lined with a refractory heat insulating material 13 and rotated by a drive apparatus 24 through a gear 25 and a hollow shaft part 19. In the shaft part 19, a center pipe 20 is provided to flow a cooling liquid into an inlet pipe 22 and discharge the same from an outlet pipe 23 to cool the rotary disc 16. An exhaust gas generaged in a waste material treating apparatus is introduced into the casing 12 from a inflow port 14 to be impinged onto the rotary disc 16 almost at right angles and a molten substance based on Al or carbon and other precipitated substances separated by re-decomposition of the gas accompanied by the gas are solidified and adhered on the disc 16 and the exhaust gas is exhausted from an outflow port 15 and adhered substances are scraped off by a scraper plate 26 to be discharged through a double lock type damper 28.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention aims to eliminate substances, especially melted substances or precipitated substances, which are discharged together with gas in waste treatment equipment such as pyrolysis equipment or incineration equipment for treating solid waste. The present invention relates to a device for properly removing the material.

For example, it is known that the exhaust gas generated in waste treatment contains various substances along with dust, and these substances can be recovered for effective resource utilization. Carbon and other precipitated substances liberated by the re-decomposition of the gas cause various problems such as solidification and adhesion in the exhaust gas line and the internal materials of the recovery and treatment equipment.

In order to prevent this disorder, for example, Japanese Patent Application No. 51-146
The invention shown in No. 373 has been made. An outline of an embodiment of the invention will be described.

A bent pipe 3 is installed immediately after the exhaust gas outlet generated in the melting furnace 1 or incinerator or in the middle of the flue 3 in the pyrolysis equipment or incinerator.
is provided, and an opening that includes the curved pipe inlet cross section is provided in the middle of the curved pipe 3, extending in the direction of the inlet flow line.

A cylindrical or rectangular tube-shaped rotating body 4 that serves as a cooling surface for solidifying and adhering a molten substance or a precipitated substance mainly composed of aluminum is provided facing the open bss, and the rotating body 4
A casing L is provided which seals the casing from the outside air.

A double discharge valve consisting of a discharge pipe 9 with a valve 8 etc. is provided in the lower part of the casing 10, and is connected to the bunker via a conveying device such as a transport pipe.

The exhaust gas discharged from the melting furnace 1 contains dust accompanying the gas,
By making the flue 3 into a curved pipe 3, the char and the melted or precipitated substances are drawn toward the rotating body 4 by inertia, and at this time, the surface temperature of the rotating body is adjusted to the freezing point of the substance to be solidified or precipitated. It is possible to selectively adhere to the surface of the rotating body 4 by selecting the temperature below or below the precipitation point.

Cooling water or cooling gas is introduced into the rotating body 4, and the side surface of the rotating body 4 constitutes a cooling surface.

* is a scraping plate for scraping off molten substances or precipitated substances adhering to the surface of the rotating body, 7 is a cyclone, and 11 is a sealing plate.

However, in such a structure, there are many parts where the side surface of the rotary body 4, which is the cooling surface, is not perpendicular to the flow of exhaust gas, and the adhesion is not sufficient and it adheres and accumulates near the seal plate 11, gradually forming a curved pipe. 3 becomes obstructed. Also,
Since the opening 1 in the cooling surface cannot have a very large convergence, it requires a large height, and the rotary body 4 has a large structure, and the mechanism for rotatably supporting it also has to be large. Furthermore, the outer diameter of the rotating body 4 requires dimensional accuracy in relation to its contact with the scraping plate 6, and the surface must be finished cleanly, making manufacturing difficult.

The present invention improves the above-mentioned points of the conventional method by applying exhaust gas at a right angle to a disk-shaped cooling surface that rotates once, and does not cause accumulation near the cooling surface, has a compact structure, and is easy to manufacture. The object of the present invention is to provide a device for easily removing melting or precipitated substances.

DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be explained with reference to the drawings regarding an embodiment in waste treatment. In Figure 2.3.4.

A casing 12 has a fire-resistant heat insulating material 13 on its inner surface. An exhaust gas inlet 14 is provided on one wall, and an exhaust gas outlet IS is provided on the other wall.

16 is a rotating disk rotatably supported by a single bearing, and the surface of the disk is.

Inflow port! It is arranged so as to be approximately perpendicular to the flow of exhaust gas flowing in from 4. Rotating disc!・The inside is hollow, and the shaft part 1 holds the central tube 30 inside, forming a double tube. 31 is a rotary joint, and the inlet pipe window 3
Cooling liquid or cooling gas is introduced into the central pipe 10 to cool the disk 16 for one revolution, and the cooling liquid, cooling gas or condensed liquid returning outside the central pipe 30 is guided to the outlet pipe 23. 34 is a drive device that rotates the rotary disk 16 via the gear 3s. 3. is a scraping board.

1 rotating disk, 1 bearing, drive device! The unit including 14 and the like is assembled with the casing 13 using three 7-rungs, and can be attached and detached with bolts.

s8 is a double lock type damper.

During operation, the exhaust gas flowing in from the inlet 14 hits the rotating disk 16 at almost right angles, and molten or precipitated substances mainly composed of aluminum solidify or precipitate and stick to the cooling surface of the disk. By selecting the surface temperature of the disc 1 to be below the freezing point or below the precipitation point of the substance to be solidified or precipitated, it is possible to selectively fix any substance to the surface of the rotating disc 1.

In addition, by appropriately selecting the gas temperature, high boiling point substances such as tar in the gas can be condensed and used as a binder to attach part of the free carbon, dust, and char in the gas to the surface of the rotating body. .

The surface of the rotating disk 16 may be subjected to a surface treatment such as Teflon processing, Ho0-finishing, or hard chrome plating to facilitate scraping.

When the rotary disk 1 rotates half a rotation, the solidified substances and precipitated substances adhering to the surface are scraped off by the scraper M36, fall inside the casing 13, and accumulate at the lower part, and at an appropriate time, the damper s8
It is then discharged.

The size of the inlet 14 can be chosen close to the size of the one-rotation disk 1.

Since this embodiment is constructed and operates as described above, it has the following remarkable effects.

(1) Since the entire flow of exhaust gas hits the cooling surface of the rotating disk almost at right angles, the collection rate of molten substances and precipitated substances is significantly improved (that is, the removal rate is high).

(2) Since there is no place for molten substances or precipitated substances to accumulate near the rotating disk, there is no risk of narrowing or clogging the exhaust gas exhaust path.

(3) Since the area exposed to the exhaust gas can be easily increased, the device can be made smaller. .

(4LJ- is also easy to increase the number of revolutions of the one-rotation disc (
It is small and has a small moment of inertia.

The rotating mechanism is also easy to increase in speed, and as described later, it is easy to manufacture, static and dynamic balance is easy to maintain, and the flatness of the plane in contact with the scraping board can be easily obtained. Therefore, a small device can have a large collection capacity (removal capacity).

(5) Manufacturing is easy because high precision is not required and flatness of the cooling surface can be easily obtained.

According to the present invention, an apparatus for removing melted or precipitated substances in a waste treatment capacity that has a high removal rate and removal ability for molten substances or precipitated substances, is compact, has no fear of clogging the exhaust gas line, and is easy to manufacture. This has an extremely large practical effect.

[Brief explanation of the drawing]

Figure 1 is a plan view of a conventional example, Figure 2 is a front view of an actual plant example of the present invention, and a sectional view taken along line I-1 in Figure 3 of the Imperial Rescript.
14 is a cross-sectional plan view taken along the line 100--2 in FIG. 3. 1... Melting furnace, 3... Flue, 3... Bent pipe,
4... Rotating body, G... Opening, 6... Scraping paddle, 711. +Ikron, 8...Valve, 9
...Discharge pipe, 10...Casing, 11...
Seal plate, 1101. Casing, l-・・insulation material, 14・・inlet, IB・・・discharge port,
16...Rotating disk, 1 piece...Bearing,
19...Shaft portion % 1018. central canal, 21.
...Rotating joint, 3...Inlet view ss...Outlet pipe,
34... Drive device, 25-Gear, 2@- Scraping board,
3 pieces...flange, 3 @... damper. Patent applicant: Director of the Agency of Industrial Science and Technology Figure 1

Claims (1)

[Claims] 1. In waste treatment equipment, a rotating disk that solidifies and adheres molten substances mainly consisting of aluminum or gases that are entrained in the gas flowing through the exhaust gas exhaust system, or carbon and other precipitated substances liberated by the re-decomposition of the gases. An apparatus for removing melted or precipitated substances, characterized in that the cooling surface is provided in the exhaust system so that the exhaust gas impinges on the cooling surface at a substantially right angle.