Unit nozzle for organizing combustion of large flow medium and low calorific value fuel

A low calorific value, high flow technology, applied in the combustion chamber, combustion method, combustion equipment and other directions, can solve the problems of low calorific value, low Wobbe index, high fuel reactivity, and achieve enhanced inscribed orientation and efficient operation. Effect

Active Publication Date: 2013-05-15
HARBIN TURBINE +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, most known low-to-medium calorific value fuels have a low calorific value compared to other fuels such as natural gas, and thus may also have a lower Wobbe index compared to other fu

Method used

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  • Unit nozzle for organizing combustion of large flow medium and low calorific value fuel
  • Unit nozzle for organizing combustion of large flow medium and low calorific value fuel
  • Unit nozzle for organizing combustion of large flow medium and low calorific value fuel

Examples

Experimental program
Comparison scheme
Effect test

Example Embodiment

[0009] Specific implementation mode one: as Figure 1~4 As shown, the unit nozzle used to organize the combustion of medium and low calorific value fuels in this embodiment includes a central oil nozzle 42, and the unit nozzle also includes a conical shell 21, a vane shroud 31 and a sleeve 41. The oil nozzle 42 is placed in the conical housing 21 and the two are coaxial. The inner wall of the outlet end (small end) of the conical housing 21 and the outer wall of the outlet end (small end) of the core oil nozzle 42 are clamped together. The outer wall of the outlet end is provided with a conical shell air cyclone 25, the outer surface of the conical shell air cyclone 25 is tapered and consistent with the tapering direction of the conical shell 21; the blade crown 31 is fixed on the cone The outer edge of the outlet end of the air cyclone 25 of the shaped shell, the two are coaxial, and the end faces are flush; the outlet end of the conical shell 21 is placed in the casing 41 an...

Example Embodiment

[0013] Specific implementation mode two: as Figure 1~4 As shown, the central oil nozzle 42 in this embodiment includes an atomizing air nozzle housing 42-1, an oil nozzle housing 42-2, a bracket 42-3 and a swirl sheet 43-4, and the atomizing air nozzle housing 42 -1 and the oil nozzle housing 42-2 are conical in shape, the oil nozzle housing 42-2 is placed in the atomizing air nozzle housing 42-1 and the gap between the two is the atomizing air channel, and the rotary The flow piece 43-4 is installed on the outlet end of the oil nozzle housing 42-2 through the bracket 42-3. The outlet spray is mixed with atomizing air. Other components and connections are the same as those in the first embodiment.

Example Embodiment

[0014] Specific implementation mode three: as Figure 1~4 As shown, in this embodiment, the first set of circumferentially spaced fuel openings 23 and the second set of circumferentially spaced fuel openings 24 are oriented obliquely with respect to the centerline 100 of the conical housing 21 at a jet angle θ 1 Inject fuel, jet angle θ 1 between 10° and 30°. Other compositions and connections are the same as those in Embodiment 1 or 2.

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Abstract

The invention relates to a fuel nozzle, in particular to a unit nozzle for organizing combustion of large flow medium and low calorific value fuel. The aim of the unit nozzle is that operation of the fuel nozzle can be safe, stable and efficient. A central oil nozzle is arranged in a conic shell and coaxial with the conic shell. A conic shell body air swirler is arranged on an outer wall at an outlet end of the conic shell. An outer surface of the conic shell body air swirler is gradually contracted and the gradually contracted direction of the conic shell body air swirler is identical to that of the conic shell. A leaf crown is fixedly connected on an outer edge of an outlet end of the conic shell body air swirler, the leaf crown is coaxial with the conic shell body air swirler and an end face of the leaf crown is aligned to an end face of the conic shell body air swirler. The outlet end of the conic shell is arranged in a sleeve tube and connected with the sleeve tube through the leaf crown. An inner space of the sleeve tube located on the upper portion of the outlet end of the conic shell is a mixing section of compressed air and medium and low calorific value gas. According to the unit nozzle for organizing the combustion of the large flow medium and low calorific value fuel, a first swirl flow relative to the fuel is matched with a second swirl flow relative to air, so that fuel-air mixture is delivered to the fuel nozzle. The fuel nozzle is safe, stable and efficient in operation.

Description

technical field [0001] The invention relates to a fuel nozzle, in particular to a fuel nozzle used by a gas turbine in an integrated gasification combined cycle (IGCC) power generation system. Background technique [0002] Some known gas turbine combustion systems combust a low-to-medium heating value fuel to produce exhaust that drives the turbine. However, most known low-to-medium calorific value fuels have a low calorific value compared to other fuels such as natural gas, and thus may also have a lower Wobbe index compared to other fuels. In addition, most of the known low-to-medium calorific value fuels have a large hydrogen content, resulting in very short fuel stream characteristic chemical times and high fuel reactivity. Because of this combination of low Wobbe index and high fuel reactivity, controlling the fuel-air mixture is of great importance for the performance and emissions of the combustor for safe, stable, and efficient operation of the fuel nozzle. Conten...

Claims

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Application Information

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IPC IPC(8): F23R3/38
Inventor 张秋鸿张宏涛冯永志王岳赵俊明王辉张文军孙中伟
Owner HARBIN TURBINE
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