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Inserting type multi-level mixing DPF combustor

A burner and DPF technology, applied in the direction of machines/engines, noise reduction devices, engine components, etc., can solve the problems of high residual oxygen content, inconvenient installation and layout, high cost, etc., and achieve extended time, increased mixing space, and complete combustion Effect

Pending Publication Date: 2020-08-11
KAILONG HIGH TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

One thing to note in this burner is that enough fresh air needs to be provided so that the fuel and fresh air can be fully mixed and burned in the combustion chamber, which requires a sufficiently large blower, which is costly, large in size, and inconvenient to install and arrange.
[0005] However, in order to improve fuel economy and reduce emissions, modern diesel engines use a high excess air coefficient, so the residual oxygen content in the exhaust of diesel engines is relatively high

Method used

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  • Inserting type multi-level mixing DPF combustor
  • Inserting type multi-level mixing DPF combustor
  • Inserting type multi-level mixing DPF combustor

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] see figure 1 As shown, this embodiment provides a plug-in multi-stage mixing DPF burner, which includes a burner outer cylinder 1 and a multi-stage combustion chamber located in the burner outer cylinder 1 .

[0024] The front end of the combustor outer cylinder 1 is connected to the exhaust pipe of the diesel engine, and the rear end is connected to the DPF catcher.

[0025] It should be noted that since the residual oxygen content in the diesel engine exhaust 19 is lower than that of fresh air, the original primary mixed combustion is difficult to achieve complete combustion, the combustion efficiency is low, and the combustion is unstable. Therefore, a multi-stage combustion chamber is used to realize the exhaust 19 Mix with fuel more than 20 times to help complete combustion. It is advisable that the number of stages of the combustion chamber should be no less than 2. In the present embodiment, the multistage combustion chamber includes an inner combustion chamber ...

Embodiment 2

[0033] see figure 2 As shown, this embodiment provides a plug-in multi-stage hybrid DPF burner on the basis of Embodiment 1. The difference between it and Embodiment 1 is that the fuel 20 does not use high-pressure direct injection, but uses compressed air auxiliary injection. Therefore, what is injected into the internal combustion chamber 2 from the injection pipe 8 and the nozzle 7 is a mixture 21 of fuel 20 and compressed air, and the compressed air is fresh air, which can be used as a combustion-supporting gas. However, the flow rate of the compressed air is very small, which can only meet the combustion needs of a small part of the fuel 20, and can only be used as a combustion support for the internal combustion chamber 2, so the air intake hole on the first end cover 6' can be reduced or even eliminated.

[0034] The advantage of this structure is that: due to the use of compressed air to assist the injection of the fuel 20, the requirements on the fuel pump are greatl...

Embodiment 3

[0036] see image 3 As shown, this embodiment provides a plug-in multi-stage hybrid DPF burner on the basis of Embodiment 1 or 2. The difference is that the flame arresting net 18' adopts a flat shape, thus reducing the difficulty of the process and facilitating production. Affect the basic function of blocking flame.

[0037] In summary, the plug-in multi-stage hybrid DPF burner uses the remaining oxygen in the exhaust of the diesel engine to mix and burn the fuel, cancels the blower, and uses a multi-stage combustion chamber to make the exhaust gas and fuel form multiple mixtures, increasing the ratio of the two. The mixing space prolongs the time of mixed combustion, so that the fuel is fully mixed with the remaining oxygen in the exhaust gas, improves the combustion efficiency, achieves complete combustion, and effectively increases the temperature of the exhaust gas.

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Abstract

The invention discloses an inserting type multi-level mixing DPF combustor. A combustor outer barrel and a multi-level combustion chamber are included. The multi-level combustion chamber comprises aninner combustion chamber and a rear combustion chamber which are sequentially arranged in the combustor outer barrel in the exhaust flowing direction. The inner combustion chamber is provided with a first end cover. The first end cover is provided with a nozzle. The barrel wall of the combustor outer barrel is provided with a material spraying pipe stretching into the interior from the exterior and an igniter. The material spraying pipe is connected with the nozzle so as to spray fuel into the inner combustion chamber. An ignition head of the igniter stretches into the inner combustion chamber. A fire stop net is arranged at the tail end of the rear combustion chamber. According to the inserting type multi-level mixing DPF combustor, the rest of oxygen in diesel engine exhaust gas is utilized for being mixed with fuel for combustion, an air blower is eliminated, multi-time mixing of exhaust gas and fuel is formed through the multi-level combustion chamber, the mixing space of the exhaust gas and the fuel is increased, the mixing and combusting time is prolonged, the fuel and the rest of oxygen in the exhaust gas are sufficiently mixed, the combustion efficiency is improved, complete combustion is achieved, and the exhaust temperature is effectively increased.

Description

technical field [0001] The invention relates to a combustor structure of a diesel particle trapping system, in particular to a plug-in multistage mixing DPF combustor. Background technique [0002] With the country's emphasis on environmental protection, internal combustion engine vehicles and non-road mobile machinery need to install exhaust treatment equipment to purify the pollutants in the exhaust. For diesel engines, one of the main exhaust pollutants is exhaust particulate matter, and it has become common to install a particulate capture (DPF) system to remove exhaust particulate matter. For the DPF system, the regeneration method is one of its important functions. One of the main regeneration methods is to use the plug-in burner to heat the exhaust gas of the diesel engine so that the exhaust gas temperature reaches the temperature required for the oxidation and combustion of particulate matter, thereby removing particulates. [0003] The plug-in DPF burner is to in...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F01N3/025
CPCF01N3/025
Inventor 臧志成骆忠民刘德文李云峰黄松
Owner KAILONG HIGH TECH
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