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Ethylene pyrolyzer waste heat boiler head and manufacture method thereof

A technology of ethylene cracking furnace and waste heat boiler, which is applied in the field of waste heat boiler head and its manufacturing, which can solve the problems of high cost, shedding of castables, inconvenient operation, etc., and achieve high temperature resistance, high thermal shock stability, and use long life effect

Inactive Publication Date: 2011-03-30
王明
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The head of waste heat boiler of ethylene cracking furnace in existing petrochemical enterprises needs to be replaced as a whole after it breaks, which is costly and inconvenient to operate
For this reason, some petrochemical companies use plug-in waste heat boiler heads. Although they do not need to be replaced as a whole, the waste heat boiler head body and plug-in parts used by them are prone to large cracks, and the pouring material falls off seriously, resulting in overheating of the outside of the head. , and block the pyrolysis gas channel

Method used

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  • Ethylene pyrolyzer waste heat boiler head and manufacture method thereof
  • Ethylene pyrolyzer waste heat boiler head and manufacture method thereof
  • Ethylene pyrolyzer waste heat boiler head and manufacture method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0050] The lower head 4 of the ethylene cracking furnace waste heat boiler includes a lower head insert 6 and a lower head body.

[0051] The component distribution ratio of the lower head insert 6 castable is: 90% tabular corundum, 1% silica powder, 5% activated alumina, 4% calcium aluminate cement, plus 0.5% by weight of dispersed alumina ADS, explosion-proof fiber 0.1%;

[0052] The composition ratio of the castable for the lower head body is: 88% mullite, 4% silica powder, 3% activated alumina, 5% calcium aluminate cement, and 0.1% explosion-proof fiber;

[0053] Among them, the explosion-proof fiber is polyurethane fiber.

[0054] The preparation method of the lower head 4 of the ethylene cracking furnace waste heat boiler: first pour the lower head insert 6, and then pour the lower head body:

[0055] (1) Add 4% water to the different component raw materials of the lower head insert 6 pouring material; stir evenly in the forced mixer for 4 minutes; place the mold on th...

Embodiment 2

[0063] The upper head 1 of the waste heat boiler of the ethylene cracking furnace includes the upper head insert 2 and the upper head body.

[0064] The component distribution ratio of the castable for the upper head insert 2 of the waste heat boiler of the ethylene cracking furnace is: 85% of tabular corundum, 0.5% of silicon micropowder, 8% of activated alumina, 6.5% of calcium aluminate cement, and the weight percentage of additional dispersed alumina ADW is 0.1%, explosion-proof fiber 0.02%;

[0065] The composition ratio of the castable for the head body is: 80% mullite, 8% silica powder, 4% activated alumina, 8% calcium aluminate cement, and 0.05% explosion-proof fiber;

[0066] Among them, the explosion-proof fiber is polyurethane fiber.

[0067] The preparation method of the upper head 1 of the waste heat boiler of the ethylene cracking furnace: first pour the upper head insert 2, and then pour the upper head body:

[0068] (1) Add water to the different component ra...

Embodiment 3

[0076] The lower head 4 of the ethylene cracking furnace waste heat boiler includes a lower head insert 6 and a lower head body.

[0077] The component distribution ratio of the lower head insert 6 castable is: 95% of tabular corundum, 1.5% of silica powder, 2% of activated alumina, 1.5% of calcium aluminate cement, 5% by weight of dispersed alumina ADW, and 0.2% of explosion-proof fiber %;

[0078] The composition ratio of the castable for the lower head body is: 95% mullite, 0.5% silica powder, 2% activated alumina, 2.5% calcium aluminate cement, and 0.25% explosion-proof fiber;

[0079] The explosion-proof fiber is polypropylene fiber.

[0080] The preparation method of the lower head 4 of the ethylene cracking furnace waste heat boiler: first pour the lower head insert 6, and then pour the lower head body:

[0081] (1) Add water to the different component raw materials of the pouring material of the lower head insert 6; stir evenly in the forced mixer for 5 minutes; plac...

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Abstract

The invention relates to an ethylene pyrolyzer waste heat boiler head comprising a head plug and a head body. The head plug casting materials comprise tabular alumina, silica micro mist, activated alumina, calcium aluminate cement, dispersed alumina ADS / ADW and explosion-proof fiber, and the head body casting materials comprise mullite, silica micro mist, activated alumina, calcium aluminate cement and explosion-proof fiber. The invention selects the materials according to the characteristics that the head plug part of the ethylene pyrolyzer waste heat boiler has higher requirements on strength and thermal shock stability, reasonably utilizes the material selection and the proportion of the head plug and the head body and organically integrates the head plug and the head body through a preparation process. Even after the plug cracks because of long-time use, the plug can be singly replaced without wholly replacing the head so as to prepare the ethylene pyrolyzer waste heat boiler headwhich has long service life, high thermal shock stability, strong high temperature erosion resistance and low cost and can bear acute temperature decline caused by frequent start and halt.

Description

[0001] technical field [0002] The invention relates to a waste heat boiler head of a petrochemical enterprise and a manufacturing method thereof. [0003] Background technique [0004] Ethylene cracking furnace waste heat boiler is an auxiliary equipment for oil refining in petrochemical enterprises. It is mainly used for waste heat recovery and comprehensive utilization of waste heat to achieve energy saving, consumption reduction and emission reduction. The waste heat boiler head of the ethylene cracking furnace is an important component of the waste heat boiler of the ethylene cracking furnace. It includes the upper head and the lower head. It needs to withstand the rapid temperature rise and drop caused by frequent start-up and shutdown. The service life of the internal castable is about two years, which is a consumable product. [0005] The prior art discloses inorganic non-metallic refractory castables for ironmaking furnace mouth such as CN200710193011.6 and refra...

Claims

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Application Information

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IPC IPC(8): C04B35/66
Inventor 王明潘永忠
Owner 王明