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Oxy-fuel combustion system having combined convective section and radiant section

A fuel and radiation source technology, applied in combustion chambers, combustion methods, combustion equipment, etc., can solve the problems of increasing total capital and operating costs, and achieve the effects of reducing total capital and operating costs, lowering total costs, and improving protection

Inactive Publication Date: 2012-12-19
AIR PROD & CHEM INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Flue gas recirculation adds to the overall capital and operating costs of the overall process in terms of furnace heat release, furnace exhaust gas temperature and flame temperature

Method used

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  • Oxy-fuel combustion system having combined convective section and radiant section
  • Oxy-fuel combustion system having combined convective section and radiant section
  • Oxy-fuel combustion system having combined convective section and radiant section

Examples

Experimental program
Comparison scheme
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Embodiment

[0058] One embodiment of the present disclosure was studied using Computational Fluid Dynamics (CFD) to simulate temperature distribution and heat transfer. The simulation area consists of a 2D rectangular area. A wall boundary is assumed to be at 3140°F (2000 K) to simulate hot furnace gases. This boundary temperature is chosen to ensure that the maximum heat flux to the water pipe is less than the critical heat flux of the water. Mixed boundary conditions (convection + radiation) were used on the opposite boundary assumed to be made of 1ft thick refractory bricks. Periodic boundary conditions are used on the adjacent sides of the simulation domain (see for example, Figure 15 ). The water tubes (ie, heat shield 110 ) and steam tubes (ie, first heat exchanger 112 ) were 2 inch OD, 0.375 inch (0.95 cm) wall thickness. The electrical conductivity of the metal tube varies with temperature and is assumed to be the same as stainless steel. Both water and steam pipe walls are ...

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PUM

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Abstract

A heat transfer system having a radiant source (108), a first heat exchanger (112) configured to permit a first fluid (114) to flow therethrough, and a thermal shield (110) configured to provide controlled radiative heat from the radiant source to the first exchanger. The radiant source is a flame. The thermal shield is a second heat exchanger configured to permit a second fluid (116) to flow therethrough or a non-contact thermal shield fabricated from a material arranged to provide controlled radiative heat exposure from the radiant source to the first exchanger. Oxy / coal combustion systems are also disclosed.

Description

[0001] Cross References to Related Applications [0002] This application is related to the following application: Application No. 12 / 238,612, entitled "OXY / FUEL COMBUSTION SYSTEM WITH LITTLE OR NO EXCESS OXYGEN," Attorney Docket No. 07228 USA, filed September 26, 2008 concurrently with this application Filed, assigned to the assignee of the present disclosure and is hereby incorporated by reference in its entirety; Application No. 12 / 238,632, entitled "COMBUSTION SYSTEM WITH STEAM OR WATER INJECTION," Attorney Docket No. 07238 USA, filed in 2008 Filed September 26 concurrently with this application, assigned to the assignee of the present disclosure and incorporated herein by reference in its entirety; Application No. 12 / 238,644, entitled "COMBUSTION SYSTEM WITH PRECOMBUSTOR," Attorney Docket No. 07255 USA, filed concurrently with this application on September 26, 2008, assigned to the assignee of the present disclosure and incorporated herein by reference in its entirety; Appl...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F23L7/00F23M5/08F23M9/00
CPCF23M5/08Y02E20/344F23L7/007F23M9/00Y02E20/34
Inventor R.J.亨德肖特何筱毅J.W.克卢斯特曼M.J.希贝A.G.斯拉夫科夫
Owner AIR PROD & CHEM INC