公开(公告)号：WO1996014548A1

公开(公告)日：1996-05-17

申请号：PCT/US1995014635

申请日：1995-10-31

Applicant: ASTEC INDUSTRIES, INC.

Inventor： ASTEC INDUSTRIES, INC. ,  SWANSON, Malcom

IPC: F27B07/02

CPC classification number: F27D99/0033 ,  F23D14/02 ,  F23D14/36 ,  F23D14/62 ,  F23N1/022 ,  F23N1/10 ,  F23N5/18 ,  F23N2025/21 ,  F23N2033/06 ,  F23N2035/06 ,  F23N2035/16 ,  F26B11/028 ,  F27B7/34

Abstract: A premix burner assembly (14) for heating the combustion chamber (12) of a dryer (10) for an HMA plant, soil remediation plant, or the like is designed to meet the very low emission limitations that are imposed in certain areas such as the southern portion of California. The burner assembly (14) includes a burner (16), a primary nozzle (38), an air source (18) connected to the burner (16), a fuel source (20), and a fuel injection system (46) connected to the fuel source (20) and to the burner (16). Premixing is achieved through the supply of a gaseous fuel from the fuel injection system (46) into the burner upstream of the primary nozzle (38) so as to lead to nearly complete premixing of the air and fuel prior to discharge into the combustion chamber (12), thereby permitting combustion of the fuel with only very small amounts of excess air. Burner efficiency is increased and emissions are further reduced by employing air distribution and control devices (48, 50) upstream of the fuel injection system and by carefully controlling the supply of both air and fuel to the burner. Preferably, burner firing is controlled by three separate controllers including a master firing rate controller (106), a gas supply controller (110), and an air supply controller (108) which communicate with one another in different manners depending on whether or not the firing rate is increasing at a particular time.

Abstract translation: 用于加热用于HMA设备，土壤修复设备等的干燥器（10）的燃烧室（12）的预混合燃烧器组件（14）被设计成满足在某些区域施加的非常低的排放限制，例如 加州南部。 燃烧器组件（14）包括燃烧器（16），主喷嘴（38），连接到燃烧器（16）的空气源（18），燃料源（20）和连接的燃料喷射系统 到燃料源（20）和燃烧器（16）。 通过将燃料喷射系统（46）中的气体燃料供应到主喷嘴（38）上游的燃烧器中以便在排放到燃烧室中之前几乎完全预混合空气和燃料来实现预混合（ 12），从而允许燃料仅具有非常少量的过量空气燃烧。 通过在燃油喷射系统的上游使用空气分配和控制装置（48,50），并仔细控制燃烧器的空气和燃料供应，从而提高燃烧器效率并进一步减少排放。 优选地，燃烧器点火由三个单独的控制器控制，包括主喷射速率控制器（106），气体供应控制器（110）和空气供应控制器（108），其以不同的方式彼此通信，这取决于是否 燃烧速率在特定时间内正在增加。

公开(公告)号：WO1992011983A1

公开(公告)日：1992-07-23

申请号：PCT/US1991009814

申请日：1991-12-27

Applicant: ASTEC INDUSTRIES, INC.

Inventor： ASTEC INDUSTRIES, INC. ,  BROCK, J., Don ,  MIZE, Erbie, Gail ,  SWANSON, Malcom

IPC: B28C05/46

CPC classification number: F26B21/02 ,  E01C19/1036 ,  E01C19/1063 ,  E01C2019/109 ,  F26B11/028 ,  F26B23/02

Abstract: A rotary heating device (20) having reduced NOx emissions including a recirculation system for recirculating gases downstream of a baghouse (12) to the heat source, such as a flame burner (28), and to a quenching ring (40) located at the end of a refractory combustion chamber (32) surrounding the burner flame (30). The addition of the recirculating gas to the burner (28) provides a cooler, turbulent flame (30). The addition of the recirculating gas via the quenching ring (40) to the end of the flame (30) reduces the length and temperature of the flame (30). The cooler, shorter, turbulent flame (30) provides sufficient heat for drying aggregate or for producing asphalt-aggregate mix while decreasing the production of NOx.

Abstract translation: 一种具有减少的NOx排放的旋转加热装置（20），包括用于将袋室（12）下游的气体再循环到诸如火焰燃烧器（28）的热源的再循环系统，以及位于该位置处的淬火环（40） 围绕燃烧器火焰（30）的耐火燃烧室（32）的端部。 将再循环气体添加到燃烧器（28）中提供了较冷的湍流火焰（30）。 通过淬火环（40）将再循环气体添加到火焰（30）的末端，减少火焰（30）的长度和温度。 较冷，较短的湍流火焰（30）提供足够的热量用于干燥骨料或生产沥青骨料混合物同时减少NOx的生产。