论文总字数：19422字

摘 要

随着世界经济的高速发展，能源问题日益突出，高效节能环保是当今全球都非常关心的主题和家电产业的发展方向。现在大家已经意识到这一问题，并在能源探索上不断做出努力，不断研究新的燃烧方式与燃料，全预混燃烧节约燃料并且能提高燃烧效率，也是本课题主要研究目标。

本课题研究内容是全预混燃烧大锅灶系统及引射器的设计。通过设定大锅灶功率，进行燃气选择和热力计算，从而得出设计引射器需要的参数，最后进行不同负荷下引射器的校核完成设计。炊用燃气大锅灶是商业集团厨房设备中耗气量较大的商用燃气厨具，过去较多采用大气式或鼓风扩散式燃烧器，普遍存在排放性能不良、负荷调节不便等缺点。许多燃气灶具远没有达到最佳燃烧状态,灶温一般低于900℃,热效率不到65%。

本次设计利用的是理论计算。通过设定锅灶总功率以及燃烧方式选定燃气种类，并得知其成分，进行热力计算。得到需要的理论燃气空气量并假定满负荷时一次空气系数为1.1，通过引射器进出口压力最终得出引射器的尺寸。最后，进行非满负荷时的检验，画出图纸，完成设计。

结论：本次设计是为了设计出一种全预混燃烧器的大锅灶，目的是节能，环保，实用。设计中的难点是引射器的选型（选用空气引射燃气型），以及如何使空气与燃气混合后的压力与出口处混合燃气的压力相等（加装零压阀）。

关键词：全预混燃烧，大锅灶系统，引射器，理论计算

The design of the premixed combustion stove pot system and ejector

Abstract

With the rapid development of world economy, energy issues have become increasingly prominent, efficient energy saving and environmental protection is the development direction in the world are very concerned about the topic and home appliance industry Now we have been aware of the this problem, and in the energy exploration make continuous efforts, continue to study the new way of combustion and fuel, the premixed combustion of fuel saving and can improve the combustion efficiency and this topic main objectives of the study.

The content of this paper is the design of the premixed combustion stove pot system and ejector. By setting the pot stove power, gas and heat calculation, design ejector needs the parameters are obtained, finally different load lead the injector and the check to complete the design. Cooking gas stove is commercial kitchen equipment group consumption volume larger commercial gas kitchen, over the past more by air or blast diffusion burner, widespread poor performance, load adjustment is inconvenient in emissions. Many gas stoves are far from optimal combustion state, the temperature range is generally lower than 900 DEG C, the thermal efficiency of less than 65%.

The use of this design is the theoretical calculation By setting the total power and the type of gas stove combustion mode selected, and that its composition, thermodynamic calculation. The theoretical gas air quantity required is obtained and the air factor is assumed to be 1.1 at full load, and the size of the ejector is finally obtained by the ejector pressure.. Finally, the test of the full load, draw the drawings, complete the design.

Conclusion: This design is to design a large range of the premixed burner for energy saving, environmental protection, utility. Difficulties in design is of induced draft (selection of air ejector type gas) selection of ejector, and how to make the air and gas mixture and the export pressure of mixed gas pressure equal to (the installation of the zero pressure valve).

Keywords: Premixed combustion, stove system, ejector, theoretical calculation

目录

摘 要 Ⅱ

Abstract IV

第1章 绪 论 3

1.1全预混燃烧技术发展现状 3

1.2 燃气灶系统简介及发展现状 7

1.2.1大锅灶的分类 9

1.3 引射器简介及发展现状 11

1.4本课题研究的内容 15

第2章 全预混燃烧大锅灶系统 17

2.1 全预混大锅灶系统的介绍 17

2.2 全预混大锅灶燃用燃气 18

2.3燃气空气混合器的分类及特性 19

2.4全预混引射器的结构选型 19

2.5 系统主要设计参数及确定 20

2.6 系统设计内容及设计步骤 21

第3章 全预混大锅灶系统的燃烧热力计算 21

3.1 燃烧负荷及空气量的计算 24

3.2引射器工作参数的计算 26

3.3引射器各部分结构尺寸计算 27

第4章 燃烧负荷校核 27

4.1 66%燃烧负荷下引射器性能校核 27

4.2 33%燃烧负荷下引射器性能校核 29

结论 32

参考文献 33

致谢 36

第1章 绪 论

炉灶与我们的生活息息相关，作为生活必需品，其能源的消耗量是巨大的。在资源紧张的今天，节能环保成为了一个永恒的话题，全预混燃烧方式以其既节能又环保的特性成为了近年来主要研究对象，

1.1全预混燃烧技术发展现状

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