Green and efficient ammonia fuel combustion system and method

A combustion system and fuel technology, which is applied to the charging system, turbine/propellant fuel delivery system, and adding non-fuel substances to fuel, etc., can solve the problems of large pollution, poor ignition, etc., and achieve the effect of reducing emissions and reducing use

Active Publication Date: 2021-04-13
XI AN JIAOTONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] In order to overcome the above-mentioned shortcomings of the prior art, the object of the present invention is to provide a green and efficient ammonia fuel combustion system. The present invention selects methane and hydrogen as combustion aids to improve the combustion process. There are two operating modes: methane / ammonia / Air and hydrogen / ammonia / air, from ammonia production to ammonia utilization, tail gas emission recovery, etc., on the one hand, provide a new utilization method of ammonia fuel, promote energy saving and emission reduction, and solve the problem of large pollution existing in existing fossil fuels On the other hand, aiming at the combustion characteristics of ammonia, adding a combustion enhancer to improve it solves the problem of its poor ignitability

Method used

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  • Green and efficient ammonia fuel combustion system and method

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Embodiment 1

[0025] Such as figure 1 As shown, a green and efficient ammonia fuel combustion system of the present invention mainly includes two parts: ammonia utilization and waste gas recovery and treatment. The ammonia utilization part mainly includes an engine 11. The engine 11 has four inlets and an exhaust gas outlet. The four inlets are respectively connected to the methane storage tank 5, the ammonia storage tank 6, the hydrogen storage device 9 and the air, and the exhaust gas outlet is connected to the waste gas heat exchange device 10. Entrance.

[0026] Through combination, there are two fuel supply modes of the engine 11, which are respectively methane, ammonia and air and hydrogen, ammonia and air. In the two supply modes, ammonia is the main fuel, and methane or hydrogen is the combustion aid to improve combustion.

[0027] The exhaust gas heat exchange device 10 has three outlets, two of which are respectively connected to the methane pyrolysis device 7 and the ammonia dec...

Embodiment 2

[0034] This embodiment provides the ammonia production part, that is, the ammonia synthesis unit 4 that provides liquid ammonia for the ammonia storage tank 6. The ammonia synthesis unit 4 has two inlets, which are respectively connected to the outlet of the electrolysis unit 2 and the separator one 3-1. Device 2 electrolyzes water to generate oxygen and hydrogen, separator 1 3-1 separates air to obtain nitrogen, hydrogen and nitrogen are synthesized in ammonia synthesis device 4 to obtain ammonia, and are supplied to ammonia storage tank 6 through long-distance transportation, etc., in liquid form In the form of storage, the electricity required by the electrolysis device 2 is provided by the distributed energy source 1-1.

Embodiment 3

[0036] In this embodiment, automatic control is added, that is, an electronic control unit (ECU) 12 is also included, and the electronic control unit 12 is used to control the fuel entering the engine 11 and its supply amount, and to detect the composition and content of the exhaust gas. By detecting the composition and content of the exhaust gas, and then adjusting the supply amount of each fuel, the thermal efficiency of the engine 11 is at a better performance, and the emission is at a lower level.

[0037] The electronic control device 12 controls the supply of fuel and air, wherein the equivalence ratio is controlled at about 1.15, and the mixing ratio of methane or hydrogen and ammonia is 30%. Under these conditions, the system can achieve optimal operation.

[0038] Specifically, there are two fuel supply modes of the engine 11: methane / ammonia / air, hydrogen / ammonia / air. This embodiment also includes an electronic control unit (ECU) 12, which is used to control the type...

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Abstract

A green and efficient ammonia fuel combustion system comprises an engine, the engine is provided with four inlets and a waste gas outlet, the four inlets are connected with a methane storage tank, an ammonia storage tank, a hydrogen storage device and air correspondingly, the waste gas outlet is connected with an inlet of a waste gas heat exchange device, the waste gas heat exchange device is provided with three outlets, two of the outlets are connected with a methane high-temperature cracking device and an ammonia decomposition device correspondingly to provide heat energy for the methane high-temperature cracking device and the ammonia decomposition device, an inlet of the methane cracking device is connected with the methane storage tank, an outlet of the methane cracking device is connected with a second separator, mixed gas obtained by methane cracking is separated into methane and hydrogen in the second separator, and a hydrogen outlet is connected with the hydrogen storage device. An inlet of the ammonia decomposition device is connected with the ammonia storage tank, an outlet of the ammonia decomposition device is connected with a third separator, mixed gas obtained through ammonia decomposition is separated into ammonia gas and hydrogen in the third separator, and a hydrogen outlet is connected with the hydrogen storage device. According to the green and efficient ammonia fuel combustion system, pollutant discharge can be controlled at a low level, and meanwhile the problem of poor ignitability of ammonia serving as fuel is solved.

Description

technical field [0001] The invention relates to a fuel combustion system, in particular to a green and efficient ammonia fuel combustion system. Background technique [0002] Distributed energy is one of the efficient measures to achieve energy conservation and emission reduction. Utilize distributed energy, in terms of environmental protection, disperse and recycle part of the pollution, and strive to achieve the goal of moderate emissions; arrange in fragments for energy transmission and utilization, reduce the loss of long-distance transmission energy, and effectively improve energy efficiency. Take advantage of security and flexibility. [0003] Faced with the gradual intensification of the greenhouse effect, new clean fuels are a research hotspot in the scientific community today. Ammonia is a promising fuel. On the one hand, ammonia, as a hydrogen-rich substance, is an ideal carrier for hydrogen energy; on the other hand, ammonia combustion can achieve zero carbon em...

Claims

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Application Information

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IPC IPC(8): F02M21/02F02M25/12F02D41/00F02D19/02F02C3/22F02C9/40
CPCF02C3/22F02C9/40F02D41/0027F02M21/0206F02M21/0218F02M25/12Y02T10/30
Inventor 张猛徐婉莹王金华卫旭涛苏利天安振华黄佐华
Owner XI AN JIAOTONG UNIV
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