Unlock instant, AI-driven research and patent intelligence for your innovation.

A pulverized coal burner with adjustable density and swirl vanes

A pulverized coal burner and swirl vane technology, which is applied to burners, burners burning pulverized fuel, combustion types, etc., can solve the problem of multi-stage concentration ring scouring, cumbersome adjustment, and unacceptable swirl state of the cyclone. Adjustment and other issues to achieve the effect of flexible and controllable separation

Active Publication Date: 2022-05-20
ZHENGZHOU UNIVERSITY OF LIGHT INDUSTRY
View PDF15 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] However, after the concentration of pulverized coal in the above two methods is concentrated, the concentration and velocity will increase, which will cause a large erosion of the multi-stage concentration ring and cause the multi-stage concentration ring to break prematurely; at the same time, the increase in the velocity of the primary air pulverized coal will also cause the furnace Destruction of inner recirculation zone is not conducive to nitrogen reduction
On the other hand, the swirling state of the cyclone in the above two methods cannot be adjusted, or the adjustment is cumbersome and cumbersome, thus affecting the combustion effect of pulverized coal

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • A pulverized coal burner with adjustable density and swirl vanes
  • A pulverized coal burner with adjustable density and swirl vanes
  • A pulverized coal burner with adjustable density and swirl vanes

Examples

Experimental program
Comparison scheme
Effect test

specific Embodiment 1

[0034] like figure 1 As shown, the present invention includes an outer primary air channel 3, an inner secondary air channel 7, and an outer secondary air channel 6 arranged coaxially from the inside to the outside, and the outlet end of the inner secondary air channel 7 is provided with an inner secondary air channel. The nozzle 9 is provided with an outer secondary air nozzle 8 at the outlet end of the outer secondary air passage 6, and the inner secondary air nozzle 9 and the outer secondary air nozzle 8 are conical flared, and the inner secondary air nozzle 9 and the inner diameter of the outer secondary air nozzle 8 gradually increases along the pulverized coal flow direction Q. For the convenience of description, the inner secondary air channel 7 and the outer secondary air channel 6 are collectively referred to as the secondary air channel. In the secondary air channel A swirler 5 is provided, and an inner primary air channel 4 is coaxially arranged in the outer primary...

specific Embodiment 2

[0040] like image 3 As shown, the difference from the specific embodiment 1 is that the outlet end 11 of the inner primary air passage is a bell mouth 16 of an alternately curved inner concave and outer convex shape, that is, the cross section of the bell mouth 16 also has alternately arranged inner concave outer convex. Convex edge 12, and the groove depth of the inner concave and outer convex edge 12 gradually increases along the pulverized coal flow direction Q; at the same time, a straight cylinder 15 is coaxially installed in the bell mouth 16, and the straight cylinder 15 is fixed on the bell mouth by a connecting rod 14 16 and there is a gap between the rear end of the straight tube 15 and the inner wall of the bell mouth 16, and the front end of the straight tube 15 is aligned with the front end 13 of the outer primary air passage.

[0041] Through the cooperation of the bell mouth 16 and the straight cylinder 15, the pulverized coal concentration in the straight cyli...

specific Embodiment 3

[0043] like Figure 4 As shown, between the inner corner of the rear end of each swirl vane 510 and the inner swivel ring 57, between the outer corner of the rear end of each swirl vane 510 and the outer swivel ring 56, all are connected by a tension spring 58, and each swirl flow The inner corner of the front end of the blade 510 is connected with the inner wall of the secondary air channel 59 through a spherical universal joint 512, thereby ensuring a more smooth and stable change of the inclination angle and the torsion angle of each swirl blade 510.

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

Abstract

The invention belongs to the technical field of boiler combustion, and discloses a pulverized coal burner with adjustable thickness and swirl blades, which includes an outer primary air channel, an inner secondary air channel, and an outer secondary air channel arranged coaxially from the inside to the outside. The outlet end of the inner secondary air channel is provided with an inner secondary air nozzle, and the outlet end of the outer secondary air channel is provided with an outer secondary air nozzle, and the inner secondary air nozzle and the outer secondary air nozzle are both tapered In the flaring type, the inner diameters of the inner secondary air nozzle and the outer secondary air nozzle gradually increase along the pulverized coal flow direction Q, and the inner secondary air channel and the outer secondary air channel are collectively referred to as the secondary air channel. A swirler is provided in the air channel, and an inner primary air channel is coaxially provided in the outer primary air channel, and the outlet end of the inner primary air channel is located inside the outlet end of the outer primary air channel, and the outlet end of the inner primary air channel is concave. The protruding alternately bent port realizes a pulverized coal burner in which the concentration of pulverized coal is separated by central wind and the swirl blades of the swirler can be adjusted.

Description

technical field [0001] The invention belongs to the technical field of boiler combustion, in particular to a pulverized coal burner with adjustable density and swirl blades. Background technique [0002] Coal-fired power plants generate large amounts of nitrogen oxides (NO) during the combustion of fuel X , which mainly contain NO (nitric oxide), NO 2 (nitrogen dioxide) and a small amount of N 2 O (nitrogen monoxide) and other gases, during the combustion process in the furnace, through the understanding of nitrogen oxides NO X The formation mechanism of the flue gas can be determined according to the way of combustion, the temperature in the furnace during the combustion process, the value of the excess air coefficient, and the length of residence time of the flue gas in the furnace. Thus, nitrogen oxides NO X thermal nitrogen oxides NO X , fuel nitrogen oxides NO X and rapid nitrogen oxides NO X Three categories. [0003] At present, the low nitrogen oxide NO x Th...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Patents(China)
IPC IPC(8): F23D1/02F23L1/00F23L9/00
CPCF23D1/02F23L1/00F23L9/00Y02E20/34
Inventor 遆曙光王浩鹏王宏聂雪丽刘燕南高柯况敏李正行
Owner ZHENGZHOU UNIVERSITY OF LIGHT INDUSTRY