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

Circulating fluidized bed boiler nozzle prefabricated part and preparing method thereof

A technology of circulating fluidized bed and prefabricated parts, applied in the direction of fluidized bed combustion equipment, combustion method, combustion equipment, etc., can solve the problems of reducing the high temperature service performance of materials, achieve good thermal shock stability, improve wear resistance and Thermal shock resistance, effect of promoting sintering

Active Publication Date: 2018-09-28
WUHAN UNIV OF SCI & TECH
View PDF5 Cites 2 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] At present, the prefabricated parts of the circulating fluidized bed boiler burner are mainly composed of corundum aggregate combined with silicon carbide fine powder, activated alumina micro powder, etc., and high-purity calcium aluminate cement is used as the binder. Strong wear resistance, especially calcium aluminate cement can produce a certain amount of liquid phase during the firing process, which promotes the sintering of the material, but at the same time reduces the high temperature service performance of the material

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

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0035] A circulating fluidized bed boiler burner preform and a preparation method thereof. The specific steps of the preparation method described in this embodiment are:

[0036] The first step, according to the mass ratio of silicon carbide particles: tabular corundum particles is 1: (20-22), adding the tabular corundum particles and the silicon carbide particles into a mixer and mixing for 4-5 minutes to obtain aggregate.

[0037] The second step, according to ρ-Al 2 o 3 The mass ratio of fine powder: silicon carbide fine powder: silicon powder: silicon dioxide fine powder: magnesium chloride fine powder is 1: (0.10~0.12): (0.05~0.07): (0.05~0.07): (0.01~0.03), the ρ-Al 2 o 3 Add the fine powder, the silicon carbide fine powder, the silicon powder, the silicon dioxide fine powder and the magnesium chloride fine powder into a mixer, and mix for 5-7 minutes to prepare a base material.

[0038] The third step, according to the mass ratio of the granular aggregate: the bas...

Embodiment 2

[0042] A circulating fluidized bed boiler burner preform and a preparation method thereof. The specific steps of the preparation method described in this embodiment are:

[0043] The first step, according to the mass ratio of silicon carbide particles: tabular corundum particles is 1: (21-23), adding the tabular corundum particles and the silicon carbide particles into a mixer and mixing for 4-5 minutes to obtain aggregate.

[0044] The second step, according to ρ-Al 2 o 3 The mass ratio of fine powder: silicon carbide fine powder: silicon powder: silicon dioxide fine powder: magnesium chloride fine powder is 1: (0.11~0.13): (0.05~0.07): (0.06~0.08): (0.02~0.04), the ρ-Al 2 o 3 Add the fine powder, the silicon carbide fine powder, the silicon powder, the silicon dioxide fine powder and the magnesium chloride fine powder into a mixer, and mix for 5-7 minutes to prepare a base material.

[0045] The third step, according to the mass ratio of the granular aggregate: the bas...

Embodiment 3

[0049] A circulating fluidized bed boiler burner preform and a preparation method thereof. The specific steps of the preparation method described in this embodiment are:

[0050] The first step, according to the mass ratio of silicon carbide particles: tabular corundum particles is 1: (22-24), adding the tabular corundum particles and the silicon carbide particles into a mixer and mixing for 4-5 minutes to obtain aggregate.

[0051] The second step, according to ρ-Al 2 o 3 The mass ratio of fine powder: silicon carbide fine powder: silicon powder: silicon dioxide fine powder: magnesium chloride fine powder is 1: (0.12~0.14): (0.06~0.08): (0.07~0.09): (0.03~0.05), the described ρ-Al 2 o 3 Add the fine powder, the silicon carbide fine powder, the silicon powder, the silicon dioxide fine powder and the magnesium chloride fine powder into a mixer, and mix for 5-7 minutes to prepare a base material.

[0052] The third step, according to the mass ratio of the granular aggregat...

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

PropertyMeasurementUnit
Laaaaaaaaaa
Bulk densityaaaaaaaaaa
Flexural strengthaaaaaaaaaa
Login to View More

Abstract

The invention relates to a circulating fluidized bed boiler nozzle prefabricated part and a preparing method thereof. According to the technical scheme, the preparing method comprises the steps that silicon carbide particles and tabular corundum particles are prepared according to the mass ratio of 1:(20-25) and mixed to prepare an aggregate; rho-Al2O3 micro powder, silicon carbide micro powder, silicon powder, silicon dioxide micro powder and magnesium chloride micro powder are prepared and mixed according to the mass ratio of 1:(0.10-0.15):(0.05-0.08):(0.05-0.10):(0.01-0.06) to prepare a base material; the aggregate and the base material are prepared and mixed according to the mass ratio of 1:(0.35-0.40) to prepare a mixed material; the mixed material and silica sol are mixed and stirredaccording to the mass ratio of 1:(0.05-0.06), forming and room-temperature maintenance are conducted, and maintenance is conducted at 110-120 DEG C; heat preservation is conducted for 2-4 h in a nitrogen atmosphere and under the condition of 1,500-1,550 DEG C, and furnace cooling is conducted to prepare the circulating fluidized bed boiler nozzle prefabricated part. The circulating fluidized bedboiler nozzle prefabricated part is simple in technology, and the prepared circulating fluidized bed boiler nozzle prefabricated part has the advantages of being high in high-temperature strength, good in thermal shock stability and high in wear resistance.

Description

technical field [0001] The invention belongs to the technical field of circulating fluidized bed boiler prefabricated parts. Specifically relates to a circulating fluidized bed boiler burner prefabricated part and a preparation method thereof. Background technique [0002] The burner is an important channel through which the fuel, air (oxygen) and slagging agent of the circulating fluidized bed boiler enter the furnace. The burners of chemical bed boilers are mostly made of refractory prefabricated parts. [0003] At present, the prefabricated parts of the circulating fluidized bed boiler burner are mainly composed of corundum aggregate combined with silicon carbide fine powder, activated alumina micro powder, etc., and high-purity calcium aluminate cement is used as the binder. Strong wear resistance, especially calcium aluminate cement can produce a certain amount of liquid phase during the firing process, which promotes the sintering of the material, but at the same tim...

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
IPC IPC(8): C04B35/101C04B35/63F23C10/18
CPCC04B35/101C04B35/6316C04B2235/3206C04B2235/3418C04B2235/3826C04B2235/428F23C10/18
Inventor 张寒陈金凤赵惠忠
Owner WUHAN UNIV OF SCI & TECH