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Preheat mixing device and method for adding alcohol-based fuel to natural gas

A mixing device and alcohol-based fuel technology, which is applied in the direction of fuel heating of turbine/propulsion device, turbine/propulsion fuel delivery system, charging system, etc., to achieve the effect of ensuring uniformity and uniformity

Active Publication Date: 2015-09-02
GUODIAN SCI & TECH RES INST +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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  • Preheat mixing device and method for adding alcohol-based fuel to natural gas
  • Preheat mixing device and method for adding alcohol-based fuel to natural gas

Examples

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Effect test

Embodiment 1

[0021] Example 1: Preheating mixing device and method for blending alcohol-based fuel into natural gas

[0022] like figure 1 , a device for blending alcohol-based fuel into natural gas, comprising a fuel pipeline, a heating unit, a temperature measurement unit and a pressure measurement unit; the fuel pipeline sequentially includes a natural gas pipeline section 1, a contraction section 2, a high-speed mixing section 4, The expansion section 5, the low-speed mixing section 6 and the nozzle 7, the high-speed mixing section 4 near the constriction section 2 are branched with an alcohol-based fuel pipeline section 3; The oil bath heating device 9 of the fuel pipeline section and the electric heating sheet 10 arranged in the low-speed mixing section, the heating sheet 10 is wrapped on the pipeline; The first thermometer T1 between them, the second thermometer T2 located between the second heater 9 and the high-speed mixing section 4 on the alcohol-based fuel pipeline section 3, ...

Embodiment 2

[0027] Example 2: The influence of the inner diameter ratio of the natural gas pipeline section and the high-speed mixing section on the uniformity of mixed gas

[0028] The OH* (OH autofluorescence) distribution can reflect the heat release intensity of the flame. Natural gas mixed with different proportions of alcohol-based fuels has different heat release intensity during combustion, so the OH* distribution is also different. The test of OH* distribution is obtained with ICCD (enhanced CCD) camera combined with BP308 / 10 narrow-band filter. The distribution of OH* in the flames of natural gas mixed with different proportions of alcohol-based fuels is different. The difference reflected is that the color distribution on the photos obtained by ICCD is different, which means that the flame heat release intensity in different regions is different. Therefore, if natural gas and alcohol-based fuel are blended uniformly, the color distribution of multiple photos obtained within a ...

Embodiment 3

[0030] Example 3: Effect of the ratio of length and inner diameter of the high-speed mixing section on the uniformity of mixed gas

[0031] In Example 1, the inner diameter of the high-speed mixing section is 3 mm, the length is 500 mm, and the length is about 167 times the inner diameter. In order to study the effect of the ratio of the length and inner diameter of the high-speed mixing section on the uniformity of the mixed gas, four other devices with different ratios were designed. The inner diameter of the high-speed mixing section is 3mm, and the lengths are: 420mm (ratio of length to inner diameter is 140:1), 450mm (ratio of length to inner diameter is 150:1), 540mm (ratio of length to inner diameter is 180:1) ) and 570mm (the ratio of length to inner diameter is 190:1), and the other pipe dimensions are the same as in Example 1. Use these 5 devices to blend alcohol-based fuel into natural gas according to the blending method in Example 1 (the blending ratio is 50%, th...

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Abstract

The invention discloses a preheat mixing device and method for adding alcohol-based fuel to natural gas. The device comprises a fuel pipeline and a heating unit. The fuel pipeline sequentially comprises a natural gas pipeline section, a contraction section, a high-speed mixing section, an expansion section, a low-speed mixing section and a nozzle in the natural gas flowing direction. The end, close to the contraction section, of the high-speed mixing section is provided with an alcohol-based fuel pipeline section as a branch. The heating unit comprises a first heater, a second heater and a third heater, wherein the first heater is located on the natural gas pipeline section, the second heater is arranged on the alcohol-based fuel pipeline section, and the third heater is located on the low-speed mixing section. By means of the device and the preheat mixing method based on the device, the alcohol-based fuel can be evenly mixed with the natural gas after being gasified, it is guaranteed that condensation is avoided in the mixing process, and the device and method have significance to research of combustion performance of mixed fuel containing different ratios of alcohol-based fuel.

Description

technical field [0001] The invention relates to the field of energy fuels, in particular to a preheating mixing device and method for blending alcohol-based fuels into natural gas. Background technique [0002] Existing gas turbine power plants generally use a single fuel for combustion, such as natural gas or oil. Compared with natural gas and oil, alcohol-based fuels such as methanol seem to be more ideal fuels for gas turbines in some respects: they can achieve higher efficiency and greater power output; at the same turbine inlet temperature, alcohol-based fuels The combustion temperature is low (due to the lower flame temperature), so its combustion has lower NO X emission. Essentially no SO due to very low sulfur content in alcohol-based fuels 2 emissions problem. In addition, alcohol-based fuels burn cleanly, reducing the number of turbine components to be cleaned, helping to reduce maintenance costs. Blending alcohol-based fuels in natural gas can improve the co...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F02C7/22F02C7/224
Inventor 刘志坦邵卫卫郝洪亮张哲巅王凯肖云汉王文飞李玉刚熊燕常连成张涛朱鸿飞
Owner GUODIAN SCI & TECH RES INST
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