CN203668326U

CN203668326U - Novel pulverized coal burner

Info

Publication number: CN203668326U
Application number: CN201320881998.1U
Authority: CN
Inventors: 刘自涛; 陈杰; 薛康
Original assignee: Xian Aerospace Yuanzheng Fluid Control Co Ltd
Current assignee: Xian Aerospace Yuanzheng Fluid Control Co Ltd
Priority date: 2013-12-27
Filing date: 2013-12-27
Publication date: 2014-06-25
Anticipated expiration: 2023-12-27

Abstract

The utility model provides a novel pulverized coal burner. A pulverized coal inlet is formed in the pulverized coal burner; a pulverized coal inlet channel is tangent to the outer wall of a pulverized coal channel; an included angle between the pulverized coal inlet channel and the center line of the pulverized coal channel is 68 degrees; two reinforcing steel bars are arranged in the pulverized coal channel in parallel, so that a rotational flow pulverized coal channel is formed in the pulverized coal channel; the two reinforcing steel bars are spirally coiled on the inner wall of the pulverized coal channel, are coiled at the pulverized coal channel inlet to form an angle of 35 degrees and are coiled at a pulverized coal channel outlet to form an angle of 60 degrees. Pulverized coal and nitrogen gas rotate forwards along the rotational flow pulverized coal channel formed by the two reinforcing steel bars, and are rotatably sprayed out of the pulverized coal channel at a certain angle and the pulverized coal still suspended to a certain extent after being sprayed out of a burner opening. According to the novel pulverized coal burner provided by the utility model, the full co-combustion of the pulverized coal and an oxidant can be ensured and the pulverized coal can be uniformly conveyed inside a hearth; in addition, the novel pulverized coal burner is stable and reliable in use.

Description

A kind of novel powdered coal burner

Technical field

The utility model relates to the fine coal burner in dried coal powder gasification installation.

Background technology

The outstanding advantages such as dry powder pressing gas metallization processes is wide with its coal adaptation in coal chemical technology, efficiency of carbon conversion is high, oxygen consumption is low, the high and low pollution of thermo-efficiency are widely used.This technique is heated up, is boosted by the special igniting system of going into operation in device start-up, and after burner hearth parameter meets design requirement, device starts to throw coal operation.

In dried coal powder gasification installation, the effect of fine coal burner is exactly the burner hearth of fine coal and oxygen delivery air inlet gasifying device, and guarantee that both mix, wherein most important coal dust supply mode, the supply mode of existing fine coal burner is generally direct jet, at coal dust passage, swirl-flow devices is not set, can not guarantees the abundant mixed firing of coal dust and oxygenant.How can uniformly fine coal be transported to burner hearth inside is the direction that everybody studies always,

Utility model content

The purpose of this utility model is to provide a kind of novel powdered coal burner, not only simple in structure, and can easily fine coal be transported to burner hearth inside uniformly.

The technical solution of the utility model is: a kind of novel powdered coal burner, it is characterized in that fine coal burner is provided with fine coal entrance, fine coal access road and coal dust channel outer wall are tangent, with coal dust channel centerline angle be 68 °; In coal dust passage, be arranged with two reinforcing bars in parallel, make to form eddy flow fine coal passage in fine coal passage, two reinforcing bars are spirally coiled in coal dust vias inner walls, are 35 ° in fine coal feeder connection coiling angle, are 60 ° in fine coal channel outlet coiling angle.

The utility model can guarantee the abundant mixed firing of coal dust and oxygenant, can uniformly fine coal be transported to burner hearth inside, and use reliable and stable.

Accompanying drawing explanation

Fig. 1 is structural representation of the present utility model.

Fig. 2 is the A-A sectional view of Fig. 1.

Embodiment

As depicted in figs. 1 and 2, the utility model fine coal burner is provided with a fine coal entrance N2, and coal dust is being carried from N2 entrance and entered burner by nitrogen, and N2 access road and coal dust channel outer wall are tangent, with coal dust channel centerline angle be 68 °; In coal dust passage, be arranged with the reinforcing bar 1 that two diameters are 20mm in parallel, be spirally coiled in coal dust vias inner walls, making to form an eddy flow fine coal passage in fine coal passage, is 35 ° at fine coal feeder connection winding angle, is 60 ° at fine coal channel outlet winding angle.

Coal dust and nitrogen are along there being the eddy flow fine coal passage forming between two reinforcing bars 1 to rotate forward, the coal channel of rotation spray powder delivery at a certain angle, after ejection burner mouth, fine coal is still with certain outstanding degree, therefore just can accelerate and the degree of mixing of oxygen, can ensure so the abundant burning of burner.

Novel fine coal supply mode has carried out brand-new design on the basis of other multiple supply modes, utilize reinforcing bar to be wound around on fine coal vias inner walls face, make fine coal passage form eddy flow fine coal passage, be similar to the rifling of gun barrel, eddy flow fine coal number of channels can be adjusted according to the import volume of fine coal, it can be also multiple can being one, also difference different according to quantity of angle and the pitch of rotation, object is all in order to guarantee that fine coal can spray burner head uniformly, and more efficient and oxygen mix burning sooner.

This design is verified by calculation and test, be about to be applied in the middle of reality, because this fine coal supply mode is made simple, the loaded down with trivial details operations such as coil pipe are saved, processing charges is effectively reduced, and wear resistance is strong, use reliable and stablely, must make the fine coal burner of producing have more the market competitiveness.

It should be noted that: the foregoing is only preferred embodiment of the present utility model, be not limited to the utility model, although the utility model is had been described in detail with reference to previous embodiment, for a person skilled in the art, its technical scheme that still can record previous embodiment is modified, or part technical characterictic is wherein replaced on an equal basis.

All within spirit of the present utility model and principle, any modification of making, be equal to replacement, improvement etc., within all should being included in protection domain of the present utility model.

Claims

1. a novel powdered coal burner, is characterized in that fine coal burner is provided with fine coal entrance, and fine coal access road and coal dust channel outer wall are tangent, with coal dust channel centerline angle be 68 °; In coal dust passage, be arranged with two reinforcing bars (1) in parallel, make formation eddy flow fine coal passage in fine coal passage, article two, reinforcing bar (1) is spirally coiled in coal dust vias inner walls, is 35 ° in fine coal feeder connection coiling angle, is 60 ° in fine coal channel outlet coiling angle.