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Device and method for mixed combustion of natural gas and alcohol-based fuel

A technology of alcohol-based fuel and natural gas, which is applied in combustion methods, gas fuel burners, fuel supply, etc., can solve the problems of obvious price rise trend, high natural gas price, and insufficient natural gas supply, so as to ensure uniformity and Uniformity, accurate and reliable research data, the effect of reducing natural gas consumption

Active Publication Date: 2015-09-30
GUODIAN SCI & TECH RES INST
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0002] Due to the limitation of my country's energy endowment, the supply of natural gas in my country is insufficient, which makes the annual utilization hours of gas-fired power plant equipment drop sharply, and the price of natural gas remains high, and the price rise trend is obvious, which has a great impact on the economy of gas-fired power generation. Severely limit the rapid growth of natural gas power generation installed capacity
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Method used

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  • Device and method for mixed combustion of natural gas and alcohol-based fuel
  • Device and method for mixed combustion of natural gas and alcohol-based fuel
  • Device and method for mixed combustion of natural gas and alcohol-based fuel

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] Embodiment 1: Device and method for blending alcohol-based fuel with natural gas

[0030] Such as figure 1, the device includes a fuel system A: a natural gas source 1, a natural gas valve 2, and a natural gas flowmeter 3 according to the flow direction of natural gas; an alcohol-based fuel source 4, an alcohol-based fuel valve 6, and an alcohol-based fuel flowmeter 7 according to the flow direction of alcohol-based fuel A nitrogen pressure source 5 installed at the alcohol-based fuel source 4 to drive the alcohol-based fuel; natural gas and alcohol-based fuel preheating and mixing pipeline A1. Air system B: includes air compressor 8, air valve 9, air pressure gauge 10, air flow meter 11, air first thermometer 12, air heater 13, air second thermometer 14 and air third thermometer 15 according to the air flow direction . Combustion system C: includes a combustion chamber 16 . Measuring system D: including thermocouple 17 for measuring flame temperature, particle si...

Embodiment 2

[0066] 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

[0067] 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 ...

Embodiment 3

[0069] Example 3: Effect of the ratio of the length and inner diameter of the high-speed mixing section on the uniformity of the mixed gas

[0070] 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 ...

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Abstract

The invention discloses a device and method for mixed combustion of natural gas and an alcohol-based fuel. The device comprises a fuel system, an air system, a combustion system, a collection control system and a natural gas and alcohol-based fuel preheating mixing pipeline. The fuel system comprises a natural gas pipeline and further comprises a natural gas source, a natural gas vale and a natural gas flowmeter sequentially in the natural gas flow direction. A alcohol-based fuel pipeline further comprises a alcohol-based fuel source, an alcohol-based fuel valve, a alcohol-based fuel flowmeter and a pressure source sequentially, wherein the pressure source is arranged at the position of the alcohol-based fuel source to drive the alcohol-based fuel in the alcohol-based fuel flow direction. The natural gas pipeline and the alcohol-based fuel pipeline are connected to the natural gas and alcohol-based fuel preheating mixing pipeline. Mixed gas composed of the mixed natural gas and alcohol-based fuel and air in the air system are sent into the combustion system to be combusted. The device and method can ensure that the alcohol-based fuel is uniformly combusted in a mixed mode in the natural gas, can be used for researching mixed combustion of the alcohol-based fuel and the natural gas in different ratios to obtain reliable and accurate research data.

Description

technical field [0001] The invention relates to the field of energy fuels, in particular to a device and method for blending natural gas with alcohol-based fuels. Background technique [0002] Due to the limitation of my country's energy endowment, the supply of natural gas in my country is insufficient, which makes the annual utilization hours of gas-fired power plant equipment drop sharply, and the price of natural gas remains high, and the price rise trend is obvious, which has a great impact on the economy of gas-fired power generation. Seriously restrict the rapid growth of natural gas power generation installed capacity. Therefore, finding clean, clean and economical alternative fuels has become an important choice. Research on alternative fuels has been carried out at home and abroad, and methanol is one of them. Methanol has been tested abroad as a fuel for gas turbines. Compared with natural gas and oil, methanol seems to be an ideal fuel for gas turbines in some ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F23D14/02F23K5/00
CPCF23D17/002F23D2204/10F23K5/00F23K5/14
Inventor 刘志坦郝洪亮王凯王文飞李玉刚王婷严志远傅静雯
Owner GUODIAN SCI & TECH RES INST
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