JPS6143072Y2 - - Google Patents

Description

[Detailed description of the invention] This invention relates to a coal spreader for a coal-fired boiler.

FIG. 1 shows a cross-sectional view of a conventional coal spreader for a coal boiler. In Figure 1, 1 is a coal supply port;
2 is a rotor for spreading, 3 is a spreading plate, 4 is a back wall of the rotor, and 5 is a boiler furnace. Coal for combustion is supplied from 1 in the direction of the dotted arrow, hits the spreading plate 3 fixed to the rotor 2 rotating in the direction of the solid arrow, scatters in the direction of the dotted arrow, and is sent to the stoker installed at the bottom of the boiler furnace 5. sprinkled on top. In this method, some coal powder gets caught between the spreader plate 3 and the rotor back wall 4 and becomes stuck, causing the rotor to stop or
There is a problem with the tip of the spreader plate causing wear.

The purpose of this invention is to solve the above-mentioned problems, and its gist is to provide a rotor that rotates at high speed with a plurality of spreader plates fixed in the radial direction, and a gap between the rotor and the rotor on the side where the spreader plates of the rotor move from the bottom to the top. a rear wall arranged from below the rotor to near the top, a coal supply port formed by a wall located at the top of the rotor and connected to the rear wall, and near the top end of the spreading plate on the side facing the rear wall. In a coal spreader, which has an opening extending from the rotor to near the lower end of the rotor to scatter the coal, fumarole pipes that eject high-pressure fluid are installed in the openings in the upper and lower gaps between the rotor and the back wall of the rotor. The coal spreader is characterized by:

According to the present invention, by jetting high-pressure fluid from the fumarole pipe, it is possible to prevent coal powder from entering and sticking to the gap, which prevents the rotor from stopping and from wearing out the spreading plate. This allows the machine to operate continuously for a long period of time.

An embodiment of the present invention will be described below with reference to FIGS. 2 to 4.

Components equivalent to the example shown in FIG. 1 are designated by the same reference numerals, and their explanation will be omitted.

Reference numeral 6 designates a fumarole pipe disposed at the upper inlet of the gap between the spreader plate 3 and the rotor back wall 4 of the rotor 2, and 7 indicates a fumarole pipe disposed at the lower inlet of the same. Fumarole pipe 6,
7 has a large number of circular holes 8 as shown in FIGS. 3 and 4.

Coal falls from a supply port 1 and is spread into a furnace 5 by a spreading plate 3 of a rotating rotor 2.

The sticking of coal powder to the rear wall 4 occurs because the coal powder floating around 6 and 7 invades the gap formed between the rear wall 4 and the spreading plate 3, so the upper fumarole pipe 6 and the lower fumarole By arranging the pipes 7 and supplying high-pressure gas such as air or steam, the coal powder can be removed by blowing it out from the holes drilled on each surface and removing the coal powder floating in the vicinity. invasion of
It can prevent sticking. Therefore, stoppage of the rotor and wear of the spreader plate are prevented.

[Brief explanation of the drawing]

Fig. 1 is a cross-sectional view showing the structure of a conventional coal spreader, Fig. 2 is a cross-sectional view showing an embodiment of the present invention, and Figs. 3 and 4 are enlarged cross-sections of the fumarole pipes 6 and 7 in Fig. 2, respectively. It is a diagram. 1... Coal supply port, 2... Rotor, 3... Spreading plate, 4... Rotor back wall, 5... Furnace, 6, 7...
... Fumarole pipe, 8... Circular hole.

Claims (1)

[Scope of utility model registration request] A rotor that rotates at high speed with a plurality of spreader plates fixed in a radial direction, and a back wall arranged from below the rotor to near the top thereof, with a gap between the rotor and the rotor, on the side where the spreader plates move from below to above. , a coal supply port located at the upper part of the rotor and formed by a wall connected to the back wall; and a coal supply port formed from near the top end of the spreading plate on the side opposite to the back wall to near the bottom end of the rotor. A coal spreader comprising an opening for spraying coal and scattering coal, characterized in that fumarole pipes for spouting high-pressure fluid are arranged in the openings in the upper and lower gaps between the rotor and the rear wall of the rotor. .