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Pulverizer apparatus with horizontal axis pivot scraper

A scraper and pulverizer technology, applied in grain processing, etc., can solve the problems of heavy components that are difficult to install, abrasive and corrosive

Inactive Publication Date: 2003-02-05
ABB ALSTOM POWER INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, in some installations, the substances found in certain coals can be more abrasive and corrosive than those found in other coals in other parts of the world
[0011] Another concern is that heavy components are more difficult to install

Method used

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  • Pulverizer apparatus with horizontal axis pivot scraper
  • Pulverizer apparatus with horizontal axis pivot scraper
  • Pulverizer apparatus with horizontal axis pivot scraper

Examples

Experimental program
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Embodiment Construction

[0033] Description of the preferred embodiment

[0034] refer to figure 1 , shows a pulverizer 10, it has an inlet 12, the coal to be pulverized is sent into from this inlet 12. The coal falls into a bowl mill 14 which is fixed on a vertical shaft 16 . A worm gear 18 is secured to the shaft 16 . A worm gear (worm) 20 is driven by a motor (not shown). Accordingly, the motor drives the worm gear 20 , thereby driving the worm gear 18 , which causes the shaft 16 to turn, thereby turning the bowl burr 14 . (Although a worm gear transmission is described herein, those of ordinary skill in the art will appreciate that other transmission systems may be used herein without departing from the invention).

[0035] The upper surface of the bowl grinding disc 14 is roughly disc-shaped. More specifically, the upper surface includes a surface 14a that is sized and configured to cooperate with a grinding roller 22. As shown in FIG. The grinding roller 22 has a frusto-conical shape.

[...

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PUM

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Abstract

A scraper assembly (52) for use with an associated coal pulverizer (10) or as part of a coal pulverizer (10) having a vertical axis (16) with a central hub (61) that rotates during normal operation of the pulverizer (10). The scraper assembly (52) includes a bracket (54, 58, 60) dimensioned and configured for attachment to the hub (61) of the coal pulverizer (10) that rotates in the normal operation of the coal pulverizer (10). The apparatus (52) also includes a shaft (56) extending from the bracket (54, 58, 60). The shaft (56) is substantially horizontal and the apparatus (52) also includes a scraping element (72) pivotally mounted on the shaft (56). A torsion spring (76) biases the scraping element (72) with respect to the shaft (56). In some forms of the invention the scraping element (72) comprises a first (62) and second (64) journals engaging the shaft (56) at axially spaced points and the scraping element (72) further includes first (66) and second (68) arms extending radially away from the shaft (56) that are respectively fixed to the first (62) and second (64) journals. The apparatus (52) may further include a first plate shaped member (70) carried on the first (66) and second (68) arms and a second plate shaped member (72) removably attached to the first plate shaped member (70).

Description

Background of the invention [0001] The invention relates to a pulverizer used in a pulverized coal combustion steam generation system. More particularly, the present invention relates to apparatus for scraping accumulated material from the lower bowl of a bowl mill. [0002] Pulverized coal combustion is more advantageous than other coal combustion methods because pulverized coal combustion is like gas combustion, therefore, the fire is easily ignited and easily controlled. [0003] Pulverizers, also known as grinders, are used to grind or pulverize fuel. The invention is mainly used in bowl pulverizers or grinders. Although the present invention will describe a bowl-type ring-roller mill, those of ordinary skill in the art will appreciate that the present invention can also be used in other bowl-type mills. [0004] In operation of the pulverizer, coal enters the center of the pulverizer through an intermediate delivery pipe. The coal is attracted to a rotating bowl which...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B02C15/00
CPCB02C15/00
Inventor R·S·普赖里R·P·普日贝齐恩
Owner ABB ALSTOM POWER INC