JPS587881B2 - Boiler combustion equipment - Google Patents

Description

[Detailed description of the invention] The present invention relates to a combustion device for a boiler.

Due to the rising cost of heavy oil, solid fuels such as coal and coke are attracting attention as alternative fuels.

-Solid fuels like this had the disadvantage of being very difficult to ignite and producing a lot of burning debris.

The grate becomes clogged due to a large amount of burnt debris and ash.
Sometimes there was no ventilation.

Therefore, long-term operation was impossible.

As a result, it was necessary to temporarily stop operation, extinguish the fire, and spend hours cleaning it up, which caused the ash to fly up, which was harmful to humans, and caused a large loss in fuel consumption.

The present invention was created in view of the above circumstances and problems, and it is possible to uniformly supply solid fuel to the solid fuel tray in the combustion chamber, quickly ignite it, and burn it efficiently and uniformly. It can be operated continuously by automatically dropping and discharging burnt debris and ash.
It is an object of the present invention to provide a combustion device for a boiler that can efficiently burn solid fuel even when burning a small amount.

The present invention will be explained below based on an embodiment shown in the drawings. A solid fuel receiver 2 provided in a combustion chamber 1 is rotated by a rotating shaft 3 and is vertically oscillated. This is a combustion device for a boiler configured so that debris and ash can be discharged outside the combustion device by an ash shovel 4 that rotates in conjunction with the rotating shaft 3.

As shown in FIG. 2, the solid fuel tray 2 is open at the top,
It has a funnel shape that gradually narrows downward, and the center portion protrudes downward to form a small saucer 2a.

Since this saucer 2 is also a grate, a large number of slit holes 5 are formed in the inclined part or the circumferential side of the small saucer 2a so that burnt debris and ash can fall through the slit holes 5. .

6 is a reinforcing rib.

The upper end of the rotating shaft 3 is fixed to the lower surface of the center of the saucer 2 constructed as described above.

The saucer 2 is provided in the combustion chamber 1 with its opening facing upward so as to be rotatable and swingable up and down.

The lower part of the rotating shaft 3 is made to protrude outside the combustion chamber 1, and a belt or chain 9 is applied to a pulley 7 and a motor 8 provided on this protruding part, and the rotating shaft 3 is rotated to rotate the saucer 2.

Further, a cam 10a is provided at the lower end of the rotating shaft 3 so that the rotating shaft 3 can rotate and swing up and down.

10b is a cam corresponding to this cam 10a, and is fixed directly below the rotating shaft 3.

The cam 10b is mounted and fixed on the fixed plate 11, and the fixed plate 11 has 4
The book is suspended from the lower part of the frame 13 by a slide rod 12.

The fixed plate 11 is inserted into the slide rod 12 so that it can be moved up and down.

However, the fixing plate 11 is configured not to move downward from a predetermined position.

A coil spring 14 is elastically fitted into each slide rod 12 between the fixed plate 11 and the frame body 13.

The frame 13 is attached to the lower part of the combustion chamber 1 (outside the combustion chamber).

15 is a bearing. The vertically swinging mechanism of the saucer 2 is not limited to the illustrated cam, but may be any other type of cam mechanism.

An ash tray 16 is provided below the tray 2 in the combustion chamber 1 and is inclined downward about the rotating shaft 3.

Reference numeral 4 denotes an ash scraper that rotates in conjunction with the rotary shaft 3, and is configured to scrape up burning debris and ash that have fallen from the tray 3 onto the ash tray 16 and discharge it from the ash discharge port 18 to the outside of the combustion apparatus. are doing.

35 is a cover that protects the rotating shaft.

Reference numeral 19 denotes a burner, and the flame injection port is directed so that the flame hits the side surface of the small saucer 2a of the saucer 2.

20 is a blower fan.

Reference numeral 21 represents a fuel feeding device for feeding solid fuel such as coke into the receiving tray 2 in the combustion chamber, 22 represents a cylinder, and 23 represents an auxiliary hopper.

Coke entering the cylinder 22 from the auxiliary hopper 23 is thrown into the combustion chamber 1 by a plunger head 25 that reciprocates within the cylinder 22 by a hydraulic pump 24.

26 is a plunger, 27 is a stopper, and 28 is a lid provided at the outlet of the cylinder 22.

Further, 29 is a hopper that sends coke to the auxiliary hopper 23, 30 is a plunger head that sends coke,
31 is a plunger, and 32 is a hydraulic pump.

In the figure, 33 is a smoke pipe, and 34 is a chimney.

The fuel feed device 21, which consists of a hopper 29, an auxiliary hopper 23, etc., is operated at a certain time by a control circuit, device, etc. to feed fixed fuel such as coke into the combustion chamber 1, and then automatically operates continuously. be able to.

The combustion device for a boiler according to the present invention as described above has the following excellent effects, and is a great invention that will contribute to the industrial world that is seeking alternative fuel due to the increase in the cost of heavy oil.

(a) Since the solid fuel receiver is rotated, solid fuel can be evenly supplied onto the receiver.

(b) Rotation of the saucer ensures even combustion and increases combustion efficiency.

(c) The rotation of the saucer provides even and even heat distribution.

(d) Since a small saucer is formed at the bottom center of the saucer,
When igniting the solid fuel, this part can be ignited intensively, allowing rapid ignition.

(e) Even when burning a small amount of solid fuel, it can be burnt intensively in this small saucer, resulting in high combustion efficiency.

(f) Since the saucer can be swung up and down by the cam mechanism, the burnt debris and ash produced on the saucer are constantly dropped, and continuous combustion can be performed without clogging the slit holes.

Therefore, the operation of the boiler does not have to be stopped and fuel efficiency is improved.

(g) Burnt debris and ash that have fallen from the tray can be automatically discharged outside the device using an ash scraper linked to the rotating shaft, so there is no need to temporarily stop operation and clean the inside of the combustion chamber. The ash caused by this cleaning does not cause any harm to the human body, and it can be operated continuously.

[Brief explanation of drawings]

The drawings show an embodiment of the present invention, and FIG. 1 is a cross-sectional view of the combustion device of the boiler of the present invention, FIG. 2 is a central vertical cross-sectional view of the solid fuel receiver, and FIG. 3 is a perspective view of the cam mechanism. . 1... Combustion chamber, 2... Solid fuel receiver,
3... Rotating shaft, 4... Ash scraper.

Claims (1)

[Claims] 1. An ash shovel that rotates a solid fuel tray provided in a combustion chamber so as to be rotated by a rotating shaft and swing up and down, and that rotates in conjunction with the rotating shaft to remove burning debris and ash that have fallen from the solid fuel tray. A combustion device for a boiler, characterized in that the combustion device can be discharged to the outside of the combustion device.