CN202056870U

CN202056870U - Low-volatility pulverized coal burner

Info

Publication number: CN202056870U
Application number: CN 201120099336
Authority: CN
Inventors: 李九狮; 许瑞杰; 刘继东; 张雪咏; 韩海照
Original assignee: Xinxing Hebei Engineering Technology Co Ltd
Current assignee: Xinxing Hebei Engineering Technology Co Ltd
Priority date: 2011-04-07
Filing date: 2011-04-07
Publication date: 2011-11-30
Anticipated expiration: 2021-04-07

Abstract

The utility model relates to a burner special for burning low-volatility pulverized coal, which is used during production of active lime through a rotary kiln. A coal air pipe, a cyclone air pipe and an axial flow air pipe are coaxially fixed on a central air pipe outwards in sequence; a pulverized powder passage is formed between the central air pipe and the coal air pipe; a cyclone air passage is formed between the coal air pipe and the cyclone air pipe; an axial flow air passage is formed between the cyclone air pipe and the axial flow air pipe; the coal air pipe is communicated with a pulverized coal metering and feeding system through a pipeline; the central air pipe, the cyclone air pipe and the axial flow air pipe are communicated with a primary air main pipe through pipelines respectively; and a smoke cover is fixed on nozzles of the central air pipe, the coal air pipe, the cyclone air pipe and the axial flow air pipe. The burner is suitable for the occasions on which low-volatility pulverized coal such as anthracite, low-quality bituminous coal, mixed coal thereof or the like is used as a calcining fuel, so that the fuel cost of the active lime can be greatly reduced.

Description

Low volatilization powdered coal burner

Technical field

The utility model relates to the low volatilization fine coal burning burner special that a kind of rotary kiln active lime is produced.

Background technology

At present, the fuel that adopted of rotary kiln active lime producing process is Chinese northern high-quality bituminous coal, blast furnace gas, coal gas of converter, coke-stove gas or combination wherein.In southern area of China, southwest particularly, low volatilization fine coal aboundresources such as anthracite and soft coal, but its combustibility is very poor, and high-quality bituminous coal must transport from the north, makes that rotary kiln active lime producing process production cost is difficult to reduce.

Summary of the invention

In order to overcome the shortcoming of prior art, the utility model provides a kind of low volatilization powdered coal burner,

The technical scheme in the invention for solving the technical problem is: the outwards coaxial successively fixedly coal airduct of central air hose, eddy flow airduct and axial flow airduct, form the coal dust passage between central air hose and the coal airduct, form eddy flow wind passage between coal airduct and the eddy flow airduct, form axial flow wind passage between eddy flow airduct and the axial flow airduct; Described coal airduct communicates with the coal powder metering feed system by pipeline, and described central air hose, eddy flow airduct, axial flow airduct communicate with a wind house steward by pipeline respectively; Fixedly hold together petticoat pipe on the spout of described central air hose, coal airduct, eddy flow airduct and axial flow airduct.

Coaxial fixedly spray bar in the described central air hose.

The utlity model has following advantage: 1), by the design of rational air channel, improve the jet velocity of axial flow wind, can be from inspiration speed on every side is slow but the very high secondary wind of temperature makes fuel conflagration; 2), eddy flow wind is by middle part band spinning disk nozzle ejection, coal dust fully mixed with air, and regulate the thickness and the length of flame, can also be by the replacing spinning disk to satisfy grog and burn till, prolong requirement such as refractory brick life; 3), hold together petticoat pipe and do not contain any movable part, thereby the life-span of burner is longer; 4), consider anthracitic difficult to burn, design has increased spray bar at the burner center, when after baking kiln later stage and maintenance, lighting a fire again, can shorten the baking kiln time, adjust burner and reach normal operating conditions as early as possible, and break down and can not guarantee still can guarantee under the situation of fineness of pulverized coal and calorific value that the limekiln can normally move in fuel system.

The utility model

Description of drawings

Below in conjunction with accompanying drawing the utility model is further specified.

Accompanying drawing is the utility model structural representation.

The specific embodiment

As shown in drawings, the outwards coaxial successively fixedly coal airduct 5 of central air hose 3, eddy flow airduct 6 and axial flow airduct 8, form the coal dust passage between central air hose 3 and the coal airduct 5, form eddy flow wind passage between coal airduct 5 and the eddy flow airduct 6, form axial flow wind passage between eddy flow airduct 6 and the axial flow airduct 8; Described coal airduct 5 communicates with the coal powder metering feed system by pipeline 4, and described central air hose 3, eddy flow airduct 6, axial flow airduct 8 communicate with a wind house steward 1 by

pipeline

2,7,9 respectively; Fixedly hold together petticoat pipe 10 on the spout of described central air hose 3, coal airduct 5, eddy flow airduct 6 and axial flow airduct 8.

Coaxial fixedly spray bar 11 in the described central air hose 3.

Claims

1. one kind is hanged down the volatilization powdered coal burner, it is characterized in that: the outwards coaxial successively fixedly coal airduct of central air hose (3) (5), eddy flow airduct (6) and axial flow airduct (8), form the coal dust passage between central air hose (3) and the coal airduct (5), form eddy flow wind passage between coal airduct (5) and the eddy flow airduct (6), form axial flow wind passage between eddy flow airduct (6) and the axial flow airduct (8); Described coal airduct (5) communicates with coal dust pot by pipeline (4), and described central air hose (3), eddy flow airduct (6), axial flow airduct (8) communicate with a wind house steward (1) by pipeline (2,7,9) respectively; Fixedly hold together petticoat pipe (10) on the spout of described central air hose (3), coal airduct (5), eddy flow airduct (6) and axial flow airduct (8).

2. low volatilization powdered coal burner according to claim 1 is characterized in that: coaxial fixedly spray bar (11) in the described central air hose (3).