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A kind of ammonia combustion control method and ammonia combustion device

A control method and ammonia combustion technology, applied in the field of ammonia combustion control and ammonia combustion devices, can solve the problems of complex structure of the device, unfavorable promotion and application of ammonia combustion technology, high cost, etc., and achieve simple structure of the device and low pressure resistance requirements , the effect of easy operation

Active Publication Date: 2020-07-03
XIAMEN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Chinese patent CN 107810365A discloses a method and equipment for burning ammonia. The device is designed with double combustion chambers. The combustion needs to be carried out under high temperature and high pressure (1400-2100K, 10-30bar). The structure of the device is complex and the cost is high. , which is not conducive to the popularization and application of ammonia combustion technology

Method used

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  • A kind of ammonia combustion control method and ammonia combustion device
  • A kind of ammonia combustion control method and ammonia combustion device
  • A kind of ammonia combustion control method and ammonia combustion device

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Embodiment 1

[0065] combine figure 1 The illustrated ammonia combustion device is used to illustrate this embodiment, and the ammonia combustion device is provided with an evaporation box 1 , a combustion chamber 4 , a burner 5 , a heat exchange coil 6 and a controller 7 .

[0066] Under the real-time control of the controller 7, the liquid ammonia is completely vaporized in the evaporation box 1. While providing cooling capacity to the outside, the obtained gaseous ammonia is passed into the burner 5 together with the carbon-containing combustible gas, and after being mixed with air Burn stably in the combustion chamber 4, and provide heat to the outside through the heat exchange coil 6;

[0067] The standard state volume flow ratio of gaseous ammonia, carbon-containing combustible gas and air fed into the burner 5 is 1:b:c, wherein, b>0.3, c=(3.57+b×d)×(0.85~1.2 ), d is the stoichiometric air-fuel ratio of the carbon-containing combustible gas. For example, select propane as the carbon...

Embodiment 2

[0072] combine figure 2 The ammonia combustion device shown is an illustration of this embodiment. The ammonia combustion device is provided with an evaporation tank 1 , a heat exchanger 2 , a thermal cracker 3 , a combustion chamber 4 , a burner 5 , a heat exchange coil 6 and a controller 7 .

[0073] In this embodiment, the thermal cracker 3 is filled with a nickel catalyst (Southwest Institute Z204), and the working temperature is 1000K-1100K; the thermal cracker 3 is placed in the area of ​​the combustion chamber 4 where the high-temperature flue gas temperature is 1050K-1150K Inside;

[0074] In this embodiment, under the real-time control of the controller 7, the liquid ammonia is completely vaporized in the evaporation box 1. While providing cooling capacity to the outside, the obtained residual gaseous ammonia, hydrogen and nitrogen generated by the cracking of part of the gaseous ammonia The mixture and combustible gas containing carbon are passed into the burner 5 ...

Embodiment 3

[0080] combine image 3 The shown ammonia combustion device illustrates this embodiment, and the shown ammonia combustion device is provided with an evaporation box 1, a heat exchanger 2, a thermal cracker 3, a combustion chamber 4, a burner 5, a heat exchange coil 6, a controller 7 and Auxiliary ammonia thermal cracker 8.

[0081] In this embodiment, carbon-containing combustible gas is not configured.

[0082] In this embodiment, the thermal cracker 3 is filled with an iron catalyst (A106 type), and the working temperature is 800K to 950K; the thermal cracker 3 is placed in the combustion chamber 4 where the high temperature flue gas temperature is 850K to 1000K ;

[0083] In this embodiment, under the real-time control of the controller 7, the liquid ammonia is completely vaporized in the evaporation box 1. While providing cooling capacity to the outside, the obtained residual gaseous ammonia, hydrogen and nitrogen generated by the cracking of part of the gaseous ammonia ...

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Abstract

The invention relates to the technical field of ammonia combustion, and particularly relates to an ammonia combustion control method and an ammonia combustion device. The ammonia combustion control method comprises the following steps of a starting combustion control stage, a continuous combustion control stage and an end combustion control stage which are sequentially conducted, by controlling the composition of mixed gas in each stage of ammonia combustion, the ammonia gas can be completely combusted under a micro-positive pressure condition, meanwhile, heat is provided to the outside, compared with a traditional high-pressure condition, the energy consumption and requirements of equipment are reduced, and the production cost is reduced. The adopted control method is simple and convenient to operate, safe and efficient, and can ensure that the ammonia combustion process is safe and stable.

Description

technical field [0001] The invention relates to the technical field of ammonia combustion, in particular to an ammonia combustion control method and an ammonia combustion device. Background technique [0002] Enterprises often need cooling and heat in the production process, and ammonia, as an energy storage material that can be synthesized artificially, has the characteristics of low liquefaction pressure, safe storage, and no carbon and particles in the combustion product. It is a renewable clean fuel . As a large ammonia producer, China is expected to use ammonia to partially replace natural gas and other gas fuels in small and medium-sized heating gas boilers, so as to alleviate the shortage of natural gas and the shortage of natural gas in my country. Liquid ammonia has a large latent heat of vaporization (for example, at -10°C, the latent heat of vaporization is 309.73kcal / kg), which can provide a large amount of cooling capacity during the gasification process and pr...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F23D14/02F23D14/46F23D14/60F24H1/43F24H9/18
CPCF23D14/02F23D14/46F23D14/60F24H1/43F24H9/1836
Inventor 王兆林陈锦郑淞生胡晓慧周梅楚育纯王月姑
Owner XIAMEN UNIV
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