Cylinder type urea mixing device with embedded rotating blades
A technology of rotating blades and mixers, used in machines/engines, mufflers, exhaust gas treatment, etc. problem, to achieve the effect of obvious airflow disturbance, improve mixing uniformity, and reduce accumulation time.
Active Publication Date: 2019-01-11
WUXI WEIFU LIDA CATALYTIC CONVERTER
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Problems solved by technology
The industry requires that the secondary crushing SMD of urea should be less than 15 μm, but the effect of disturbed air flow on urea crushing is limited, and it cannot solve the problems of mixing uniformity and urea crushing at the same time
Poor secondary crushing effect of urea is an important factor for crystallization of urea
Method used
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[0021] The present invention will be further described below in conjunction with specific drawings.
[0022] The application of the tubular urea mixer embedded with rotating blades in the present invention on the exhaust aftertreatment device is as follows: figure 1 As shown, the exhaust aftertreatment device consists of an intake pipe assembly 1, a DOC assembly 2, a DPF assembly 3, a urea mixer 4, an SCR assembly 5, an outlet pipe assembly 6, a first mounting bracket assembly 7-1, and a second mounting bracket assembly 7-2, the third mounting bracket assembly 7-3 and other components.
[0023] The exhaust gas from the engine enters the exhaust post-treatment device from the intake pipe assembly 1, passes through the DOC assembly 2 and the DPF assembly 3, and then enters the urea mixer 4, where the urea mixing, secondary crushing and decomposition are completed. After the urea is decomposed into ammonia gas, it enters the SCR assembly 5 and is finally discharged through the o...
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The invention relates to a cylinder type urea mixing device with embedded rotating blades. The cylinder type urea mixing device is characterized in that the urea mixing device is composed of a cylinder, an air inlet partition plate, an embedded flow baffle, the inner-layer rotating blade, the outer-layer rotating blade, an air outlet partition plate, a lower spoiler and an upper spoiler; the air inlet partition plate and the air outlet partition plate are installed on the cylinder, the air inlet partition plate is provided with an inlet and an inlet groove which are used for guiding airflow toenter the urea mixing device from different positions; the embedded flow baffle, the inner-layer rotating blade and the outer-layer rotating blade are directly connected to the inner side of the airoutlet partition plate; and the lower spoiler and the upper spoiler are connected to the outer side of the air outlet partition plate. By means of the cylinder type urea mixing device, a good secondary urea breaking effect is achieved, the urea mixing effect and the urea decomposing rate can also be obviously improved through rotational flow, and the cylinder type urea mixing device is used for solving the problems about secondary breaking, mixing uniformity and crystal preventing of urea in an SCR system.
Description
technical field [0001] The invention relates to a cylindrical urea mixer, in particular to a cylindrical urea mixer embedded with rotating blades, and belongs to the technical field of engine exhaust aftertreatment. Background technique [0002] In the SCR system application technology, how to uniformly mix the injected urea and engine exhaust gas and reduce the risk of urea crystallization at the mixer position is the key to the entire development process. The conventional urea mixer structure has problems such as easy crystallization of urea, low urea decomposition efficiency, and uneven mixing. [0003] The conventional urea mixer uses a fin structure to disturb the air flow to achieve the mixing of urea and exhaust gas, and strengthen the secondary crushing effect of urea by disturbing the air flow. The industry requires that the secondary crushing SMD of urea should be less than 15 μm, but the effect of disturbed air flow on urea crushing is limited, and it cannot solv...
Claims
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Patent Timeline
Login to View More IPC IPC(8): F01N3/28F01N3/20
CPCF01N3/2066F01N3/28F01N2610/02
Inventor 陈增响郭鑫张俊超何龙马相雪何伟娇付细平
Owner WUXI WEIFU LIDA CATALYTIC CONVERTER