JPS6344641Y2 - - Google Patents

Description

[Detailed description of the invention] This invention enables high-temperature powder and granular material, which is a heat source, to be rapidly discharged from the boiler body in the event of an emergency such as a drop in the drum level or damage to the boiler tube in a powder contact type boiler. This invention relates to a powder contact boiler.

If an emergency situation occurs for some reason in a powder contact boiler, the fuel supply will be immediately stopped in the same way as in a normal fuel-fired boiler.
It is necessary to immediately discharge the high-temperature powder and granules that are the heat source out of the system, but if you try to discharge this using the discharge device used during normal operation, the discharge capacity will be lower than the capacity required during normal operation. The ejection device must have an extremely large capacity compared to the above. Therefore, when a large-capacity discharge device is installed, the conveyance device for the discharged granular material must also be a large-capacity device, and high-temperature granular material that has not undergone sufficient heat exchange within the boiler body is transported. Since it is supplied to a device, there is a problem in that the heat resistance of the conveying device must be excessively increased.

The present invention overcomes the problems of the conventional granular material contact boiler described above, and provides a granular material contact boiler equipped with a device that can rapidly discharge high-temperature granular material from the system in the event of a boiler emergency. This was proposed for the purpose of providing powder and granule contact boilers that are equipped with a powder discharge device and a conveyance device for normal use below the discharge port of the hopper-shaped part of the boiler main body. An opening door that is normally held closed and can be opened by the weight of the powder or granules is pivoted to the side wall of the hopper-shaped part that receives the weight, and an emergency lock is installed to release the opening door from the closed state in an emergency. The present invention relates to a powder contact boiler characterized by being equipped with a removal device.

Hereinafter, according to the embodiments shown in FIGS. 1 to 3,
The present invention will be explained in detail.

In Fig. 1, 1 is the boiler main body, 1a is a supply port for high-temperature powder and granules, and 2 is a boiler tube. After exchanging heat, it falls under its own weight into the hopper-shaped portion 1b at the bottom. Reference numeral 3 denotes a powder discharge device used during normal operation, which is installed in the discharge pipe 1c that communicates with the lower end opening of the lower hopper-shaped portion 1b of the boiler body 1, and 4 is a conveyor installed directly below the discharge pipe 1c. During normal operation of the boiler, the powder and granular materials in the boiler body 1 are transferred to the conveyor device 4 by the discharge device 3.
It is discharged upward and transported to the next process by the transport device 4. Reference numeral 5 denotes an emergency discharge device for powder and granular material attached to the hopper-shaped portion 1b of the boiler body 1, the detailed structure of which is shown in FIGS. 2 and 3. In those figures, 5a is an opening/closing door whose lower end edge is rotatably attached via a pin 5c to a bracket 5b protruding from the outer wall of the hopper-shaped portion 1b of the boiler body 1 at a suitable location. The upper part of the door 5a is fixed to the hopper-shaped part 1b of the boiler body 1 via a removable pin 5e, which is inserted into a bracket 5d projecting from an appropriate position on the outer wall of the hopper-shaped part 1b of the boiler body 1. 5f is a gasket attached to the inner side of the periphery of the opening/closing door 5a;
has the role of preventing powder from spilling out of the hopper-shaped portion 1b when the opening/closing door 5a is closed.
5g is a chain connected to one end of the pin 5e, and the other end of the chain 5g is connected to a lever 5 which will be described later.
connected to h. Reference numeral 5i denotes a shaft rod that is supported by a pair of bearings 5j protruding from the outer wall of the hopper-shaped portion 1b of the boiler body 1 and can slide in the axial direction. A pin 5 is attached to the tip of the rod of a fluid pressure cylinder 5e installed on a bracket 5k placed at a suitable location on the outer wall of the cylinder.
m, and the hydraulic cylinder 5
The shaft rod 5i can be slid in the axial direction by remotely controlling the shaft 5i. The lever 5h to which the other end of the chain 5g is connected is the shaft rod 5.
It is fixed to i. and a fluid pressure cylinder 5l
When the shaft lever 5i slides in the direction of the arrow in FIG. 2 due to the operation of
e can be pulled out from the bracket 5d. In this way, the upper pin 5e, the chain 5g, the lever 5h, the shaft 5i, the fluid pressure cylinder 5l, etc. constitute an emergency release device that releases the closed state of the door 5a. 6 is a chute installed in the hopper part 1b of the boiler main body 1, as shown in FIG.
The chute 6 not only guides the powder and granular material from the emergency discharge device 5, but also has the role of protecting the discharge device 3 and the transport device 4 in normal use from the powder and granular material.

One embodiment of the boiler of the present invention is constructed as described above, and when a boiler emergency occurs, the hydraulic cylinder 5l is operated to the pull side by remote control, and the shaft rod 5i is moved in the direction of the arrow (Fig. 2). slide it. Then, the upper pin 5e is pulled out from the bracket 5d via the lever 5h and the chain 5g, so that the opening/closing door 5a rotates around the lower pin 5c due to the weight of the powder in the boiler body 1 as shown in FIG. As shown by the one-dot chain line, it is opened instantly, and the granular material inside the boiler body 1 is discharged to the outside of the boiler body 1 and taken out of the system via the chute 6. Since the granular material contact type boiler of the present invention has the above-described configuration and operation, according to the present invention, (1) In the event of a boiler emergency, the opening/closing door 5a of the emergency discharge device 5 can be opened. By opening, the granular material inside the boiler body 1 can be instantly discharged to the outside of the system.

(2) Capacity of discharge equipment and conveyance equipment in normal use,
There is no need to increase the capacity to the level required for emergencies, which occur less frequently, and the capacity can be adjusted to the level required for normal operation, and moreover, the discharge capacity required for emergencies can be demonstrated.

The following practical effects can be mentioned.

4 and 5 show other examples of means for attaching and detaching the upper part of the opening/closing door 5a of the emergency discharge device 5 to and from the hopper-shaped portion 1b of the boiler main body 1, but the one shown in FIG. , shows an example using a door holding lever 7 that rotates when the shaft 5i slides in the direction of the arrow, and in the example shown in FIG. An example is shown in which the door 5a can be opened and closed by rotation.

[Brief explanation of the drawing]

Figures 1 to 3 are schematic illustrations of an embodiment of the present invention, in which Figure 1 is a longitudinal sectional view, Figure 2 is a front view of the emergency ejection device, and Figure 3 is an opening/closing door of the emergency ejection device. The side view, FIGS. 4 and 5 show other examples of means for attaching and detaching the upper part of the opening/closing door of the emergency discharge device to and from the hopper-shaped portion of the boiler body. 1...Boiler main body, 1a...Powder material inlet, 1
b... molten part, 1c... discharge pipe, 2... boiler tube, 3... discharge device, 4... conveyance device,
5...Emergency discharge device, 5a...Opening/closing door, 5b...
Lower bracket, 5c...Lower pin, 5d...Upper bracket, 5e...Upper pin, 5f...Putskin, 5g...Chain, 5h...Lever, 5i
...shaft, 5j...bearing, 5k...bracket,
5l...Fluid pressure cylinder, 5m...Pin, 6...
Shoot, 7, 8... Door holding lever.

Claims (1)

[Scope of utility model registration request] In a powder contact type boiler that is equipped with a powder discharge device and a conveyance device for normal use below the discharge port of the hopper-shaped part of the boiler body, the side wall of the hopper-shaped part that receives the weight of the powder is usually The powder is characterized by having a pivotably mounted door that is held in a closed state at times and can be opened by the weight of the powder, and an emergency release device that releases the door from the closed state in an emergency. Body contact boiler.