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Small size low Nox gas burner equipment and method

A gas burner and burner technology, which is applied to gas fuel burners, combustion equipment, combustion methods, etc., can solve problems such as low regulation, large overall burner equipment, and long flames.

Inactive Publication Date: 2005-11-30
JOHN ZINK CO LLC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In addition, the burner equipment hitherto used to carry out the above method is generally larger, produces a longer flame and has a lower turndown ratio

Method used

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  • Small size low Nox gas burner equipment and method
  • Small size low Nox gas burner equipment and method
  • Small size low Nox gas burner equipment and method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0035] The burner device 10 is designed to release 8,000,000 BTU per hour of heat by burning natural gas having a calorific value of 913 BTU / SCF, causing the burner device 10 to burn into the furnace space. Pressurized fuel gas was provided to conduit 48 of the burner 10 at a pressure of 33 psig and a flow rate of 8765 SCF / hour. A 20% volume fraction of this fuel gas (1753 SCF / hour) is used as the first fuel gas and is discharged through the fuel gas discharge nozzle 44 and through the fuel gas discharge nozzle 54 in the hole 32 and the burner tile 28, which is discharged Nozzles 54 are disposed adjacent apertures 42 in walls 40 of combustor tiles 28 . The remaining portion of the fuel gas (ie, the second portion) is discharged into the furnace space at a rate of 7012 SCF / hour through nozzle 54 as a separate fuel gas stream mixed with the exhaust gas.

[0036]The rate of air introduced into the furnace space through the air regulator 24, housing 14 and burner tiles 28 exceeds...

Embodiment 2

[0038] In order to see the flame pattern produced by the burner apparatus 10 when operating as described in Example 1 above, a computer simulation program was utilized. The software used is available from Fluent Inc. Of Lebanon, New Hampshire, USA. The burner design can be recreated in the simulation program in full 3D detail including all important features such as tile surfaces, fuel gas perforations, flame holder tile shoulders and complete air chamber structure.

[0039] A three-dimensional model of the furnace in which this burner device was tested was fitted in the furnace model, which was exactly the same as the test burner and furnace used in Example 1, except that the air entered from the side instead of the bottom . The flow space in the burner model is divided into many small volumes using the finite volume method, and boundary adjustments such as fuel pressure, flow rate, etc. are used at the inlet of the burner model. The software then calculates and predicts th...

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PUM

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Abstract

Compact low NOx gas burner apparatus and methods for discharging fuel gas and air mixtures into furnace spaces wherein the mixture is burned in folded flame patterns and flue gases having low NOx content are formed are provided. A burner apparatus of the invention is basically comprised of a housing having a burner tile attached thereto and means for introducing air therein. The burner tile has an opening therein with a wall surrounding the opening which extends into a furnace space. The exterior sides of the wall are divided into sections by radially positioned baffles with alternate sections having the same or different heights and slanting towards the opening at the same or different angles. Primary fuel gas mixed with flue gases and air is discharged through the burner tile. Secondary fuel gas is discharged adjacent to the external slanted wall sections whereby the secondary fuel gas mixes with flue gases in the furnace space. The resulting fuel gas-flue gases streams mix with the fuel gas-flue gases-air mixture discharged through the burner tile and the resulting mixture is burned in the furnace space.

Description

technical field [0001] The present invention relates to the NOx of the exhaust gas produced by combusting a fuel gas-air mixture. x Lower content gas burner apparatus and methods. Background technique [0002] Government authorities have been continuously proposing emission standards for gaseous pollutants such as nitrogen oxides (NO x ) is limited. These standards have led to the development of various NO reduction x and other waste gas generation improved gas burners. For example, methods and apparatus have been developed in which all the air and some fuel is combusted in a first zone and the remaining fuel is combusted in a second zone. In this staged fueling method, the excess air in the first zone acts as a diluent which lowers the temperature of the combustion gases and thus reduces NO x Formation. Other methods and devices have been developed in which exhaust gases are combined with fuel gas and / or fuel gas-air mixtures to dilute the mixture and reduce their com...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F23D14/02F23C6/04F23C9/00F23C99/00F23D14/70F23D14/84
CPCF23C9/00F23D14/70F23C2202/20F23C6/047F23D14/02
Inventor 钟一萍耶西·史蒂文·钱伯斯卡罗尔·安·斯基尼朋罗杰·L·波雅万特·D·贾亚卡尔理查德·T·韦贝尔迈克尔·G·克拉克斯顿玛丽安·兹莫拉达林·罗伯特·福特
Owner JOHN ZINK CO LLC
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