JPH0539914A - Soda recovery boiler - Google Patents

Abstract

PURPOSE:To discharge ash through an ash hopper continuously to guarantee a stable boiler operation. CONSTITUTION:An ash hopper 11 is installed in the high temperature section of a soda recovery boiler, and below the ash hopper 11 a discharger 12 is installed which has a cooling means in the lower section. Said cooling means injects water or air for cooling through a cooling piping 13 into said discharger 12 from the ceiling, side faces, and lower face of the discharger 12. With this arrangement molten ash that is received on a rotating table 14 provided in the discharger 12 is cooled and solidified by blowing water or air to it and it is discharged through an expansion joint 15, damper section 16, and discharge chute 17.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a soda recovery boiler, and more particularly to a soda recovery boiler configured to take out molten ash by an ash hopper attached to a high temperature section.

[0002]

2. Description of the Related Art FIG. 4 is a side view schematically showing the structure of a conventional soda recovery boiler, and FIG. 5 is a front view of the ash hopper portion in FIG. In these figures, an ash hopper 2 is installed in the high temperature part 1 of the soda recovery boiler, and the ash attached to the superheater pipe 3 arranged above the ash hopper 2 is melted to operate the suit blower. Sometimes it falls without solidifying. And
At the bottom of the ash hopper 2, an expansion joint 4, a double lock damper 5, and a discharge chute 6 are sequentially connected and arranged. In FIG. 4, reference numeral 7 indicates a low temperature part.

[0003]

However, in the conventional soda recovery boiler described above, the ash attached to the superheater pipe 3 blocks the gas passage, and the gas temperature is locally 60.
As the temperature rises to 0 ° C. or higher, part of the ash attached to the superheater pipe 3 is melted, and when the suit blower operates, the melted ash drops and accumulates in the ash hopper 2 without solidifying. Then, the molten ash is piled up on the lower surface of the ash hopper 2 so that the ash cannot be discharged continuously, and the ash is constantly ejected by manpower to secure the operation, or periodically (every 1 to 2 months). The boiler was stopped and the ash was discharged manually. Therefore, there is a problem that stable operation cannot be guaranteed.

The present invention has been made in order to solve the problems of the prior art, and enables the ash to be continuously discharged through the ash hopper, thereby realizing a stable operation of a soda recovery boiler. The purpose is to provide.

[0005]

In order to solve the above problems, the present invention relates to a soda recovery boiler configured so that molten ash is taken out by an ash hopper attached to a high temperature part, and a lower part of the ash hopper is provided. It is provided with a decharger having a cooling means.

[0006]

According to the above means, the molten ash is cooled and solidified by the cooling means in the decharger provided at the lower part of the ash hopper and can be continuously taken out.
Stable operation is possible.

[0007]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described in detail below with reference to FIGS. 1 is a side view showing the configuration of the ash hopper portion of the soda recovery boiler according to this embodiment, FIG. 2 is a view taken along the line II-II of FIG. 1, and FIG. 3 is I of FIG.
It is a II-III line arrow line view.

In these drawings, an ash hopper 11 having an appropriate inclination is installed in the high temperature part of the soda recovery boiler, and the ash hopper 11 has a superheater tube (Fig. Ashes attached to (not shown) are melted and fall down without solidifying when the suit blower operates.

Further, according to the present embodiment, a decharger 12 having a cooling means at the bottom of the ash hopper 11 is provided.
Is attached. In the present embodiment, the cooling means is configured to inject cooling water or air into the decharger 12 through the cooling pipe 13 from the ceiling, the side surface and the lower surface of the decharger 12. A rotary table 14 is provided inside the decharger 12, and the expansion joint 1 is provided below the decharger 12.
5, a damper section (double air lock damper or rotary damper) 16 and a discharge chute 17 are sequentially connected and arranged.

Next, the operation of the soda recovery boiler having the above-mentioned structure will be described. First, the ash that has adhered to the superheater tube in the high temperature part of the soda recovery boiler and has been melted falls into the ash hopper 11 by the operation of the suit blower and is received on the rotary table 14 in the decharger 12. The molten ash on the turntable 14 is shown in FIG.
By rotating in the direction of the arrow A in the inside, while being crushed to an appropriate particle size, cooling water or air sent through the cooling pipe 13 from the ceiling, side surface and lower surface of the decharger 12 is sprayed and solidified by cooling. To be done. Next, the solidified ash drops from the rotary table 14, passes through the expansion joint 15, accumulates in the lower damper part 16, and is sent to the discharge chute 17 in a fixed amount.

As a modification of the cooling means, the rotary table 14 may be water-cooled instead of the cooling pipe 13 or in addition to the cooling pipe 13.

[0012]

As described above, according to the present invention, since the ash hopper attached to the high temperature part of the soda recovery boiler is provided with the decharger having the cooling means in the lower part, the molten ash is removed. In the decharger, it becomes possible to cool and solidify by the cooling means and take out continuously.
The work of discharging the ash in the boiler by stopping the boiler for 4 days becomes unnecessary, and a stable operation can be guaranteed, which is an excellent effect.

[Brief description of drawings]

FIG. 1 is a side view showing a configuration of an ash hopper portion of a soda recovery boiler according to an embodiment of the present invention.

FIG. 2 is a view taken along the line II-II of FIG.

FIG. 3 is a view taken along the line III-III in FIG.

FIG. 4 is a side view schematically showing a configuration of a conventional soda recovery boiler.

5 is a front view of the ash hopper portion in FIG. 4. FIG.

[Explanation of symbols]

 11 Ash Hopper 12 Death Charger 13 Cooling Pipe 14 Rotary Table 15 Expansion Joint 16 Damper 17 Discharge Chute

Claims (1)

[Claims] 1. A soda recovery boiler configured to take out molten ash by an ash hopper attached to a high temperature part, wherein a soda recovery having a cooling means is provided below the ash hopper. boiler.