Improved reverberatory screen for radiant burner

A reflective screen and radiation furnace technology, applied in the direction of burner, combustion type, combustion method, etc., can solve the problem of limiting the working temperature of radiation type combustion furnace

Inactive Publication Date: 2000-04-19
LANXIDE TECH LP +1
View PDF4 Cites 1 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Thus, even though increasing the temperature increases the thermodynamic efficiency of the furnace, the chemical and mechanical limitations of the metal limit the practical operating temperature of the radiant furnace

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
  • Improved reverberatory screen for radiant burner
  • Improved reverberatory screen for radiant burner
  • Improved reverberatory screen for radiant burner

Examples

Experimental program
Comparison scheme
Effect test

example 1

[0062] Silicon carbide fiber bundle (the diameter of single fiber is 15-20 micron, and the fineness is the Nicalon of 1800 deniers, produced by Nippon Carbon Co., Ltd. in Tokyo, Japan) is woven into a porous simple braid, with 1.8 per centimeter root fiber bundles. This fabric has an open area of ​​approximately 50%. The fabric was then impregnated with a mixture of polymethyl methacrylate resin and boron carbide particulate antioxidant (average particle size 2-3 microns) as described in the Gray patent. The impregnated porous fabric was then formed into corrugated shapes in graphite molds. These folds are about 1 cm high and about 1 cm wide.

[0063] The molded screen was placed into a low pressure chemical gas permeation reactor having a deposition chamber about 1.4 meters in diameter and about 2 meters in length. Methane is fed into the reactor at a flow rate of approximately 15 standard liters per minute (Slpm), at low pressure (less than 100 Torr) and at a temperature ...

example 2

[0067] A reflective screen having a width of about 2 cm using fewer corrugations, ie wider corrugations, can be produced in exactly the same way as described in Example 1. Then conduct a comprehensive test of radiation output and heat engine on the finished screen. It was determined that the radiant output of the furnace with the reflective screen was 33% higher than that of the furnace without the screen. The two percent reduction in radiant output compared to a reflective screen with more corrugations (such as that of Example 1) is due to the smaller effective surface area for radiation.

[0068] The same screen was thermally cycled exactly as described in Example 1. After about 4000 switches, no changes were observed on the screen and the test was stopped.

example 3

[0070] The screen described in Example 1 was made from the same Nicalon(R) fiber, but the acrylic resin was replaced with phenolic resin (designation SC-1008, Borden, Ohio). The purpose of the phenolic resin is to harden the fiber into a corrugated shape in the mold during the plasticization process, and at the same time form a carbonaceous interface on the surface of the fiber. Thus, a CVI reactor is not used to deposit a separate layer of carbon. Instead, the above molded screen using phenolic resin is heated to about 1000°C in an inert gas atmosphere, which converts the resin into glassy carbon. The screen was removed from the mold and placed into a SiC CVI reactor as described in Example 1. Upon cooling, the finished screen can be seen to harden and become a self-supporting part.

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 present invention relates to porous mat gas fired radiant burner panels utilizing improved reverberatory screens. The purpose of these screens is to boost the overall radiant output of the burner relative to a burner using no screen and the same fuel-air flow rates. In one embodiment, the reverberatory screen is fabricated from ceramic composite material, which can withstand higher operating temperatures than its metallic equivalent. In another embodiment the reverberatory screen is corrugated. The corrugations add stiffness which helps to resist creep and thermally induced distortions due to temperature or thermal expansion coefficient differences. As an added benefit, it has been unexpectedly discovered that the corrugations further increase the radiant efficiency of the burner. In a preferred embodiment, the reverberatory screen is both corrugated and made from ceramic composite material.

Description

field of invention [0001] The present invention relates to panels for perforated baffle gas radiant furnaces using improved reflective screens. The purpose of these reflective screens is to increase the overall radiant output of a gas furnace relative to a furnace without the reflective screen and with the same gas flow rate. In addition, the reflective screen of the radiant burner enables the burner panel to operate at a lower fuel consumption rate, thereby reducing the temperature of the perforated plate, thereby extending its service life. Background of the invention [0002] Perforated gas radiant furnaces have been used for many years. The perforated gas radiant furnace is an inexpensive source of radiant energy when compared with a comparable resistance heating device. These ovens have many industrial uses such as drying of paint and paper etc. Some other applications include, for example, the heating of corridors in cold weather. [0003] This burner consists of a...

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 Applications(China)
IPC IPC(8): F23D14/16F23D14/14
CPCF23D14/14F23D2211/00F23D14/145F23D14/149
Inventor P·E·格雷
Owner LANXIDE TECH LP
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap