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Marine diesel engine SCR common rail type urea solution spraying system

An injection system, Tianlan technology, applied in the direction of mechanical equipment, engine components, combustion engines, etc., can solve the problems of increasing manufacturing, installation and operating costs

Inactive Publication Date: 2014-10-22
武汉添蓝发动机排放控制技术有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Therefore, when marine diesel engines with different purposes and operating characteristics need to be introduced into the SCR system at the same time, multiple sets of Tianlan injection devices must be installed to meet different injection volume requirements, which will undoubtedly increase additional manufacturing, installation and Operating costs

Method used

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  • Marine diesel engine SCR common rail type urea solution spraying system
  • Marine diesel engine SCR common rail type urea solution spraying system

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Embodiment 1

[0040] In embodiment 1, the number of engines that are supplied to Tianlan at the same time is not limited to two, and can be adjusted arbitrarily within the capacity of Tianlan's daily cabinet 21.

[0041] The second embodiment of the present invention is as figure 2 As shown, there are three spray guns 31 , which are located in the same engine exhaust pipe 32 and evenly arranged along the circumferential direction of the inner wall of the engine exhaust pipe 32 . After passing through filter 22, Tianlan cut-off valve 23, output solenoid valve 24 and metering solenoid valve 25, Tianlan is divided into three circuits, which are respectively connected with liquid inlets 30 of three spray guns 31; The compressed air is also divided into three paths through the compressed air stop valve 2, the second pressure reducing valve 27 and the compressed air check valve 28, which are respectively connected to the gas inlets 29 of the three spray guns 31; since the gas and liquid flow rat...

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Abstract

The invention discloses a marine diesel engine SCR common rail type urea solution spraying system which comprises a compression air source, a urea solution daily tank, a controller, a metering electromagnetic valve and spraying guns. A pressurizing port of the urea solution daily tank is connected with the compression air source, an output port of the urea solution daily tank is connected with liquid inlets of the spraying guns through the metering electromagnetic valve, gas inlets of the spraying guns are connected with the compression air source, the controller controls the duty ratio of the metering electromagnetic valve to control the volume of the atomized urea solution sprayed by the spraying guns, a liquid level sensor is arranged in the urea solution daily tank, the controller controls a urea solution source to add a urea solution to the urea solution daily tank according to the liquid level information transmitted by the liquid level sensor, and the spraying guns are all located at the front end of an SCR catalyst in an engine exhaust pipe. The marine diesel engine SCR common rail type urea solution spraying system is capable of simultaneously supplying the urea solution to multiple marine diesel engines in real time, high in applicability and obvious in cost saving.

Description

technical field [0001] The invention relates to the field of marine diesel engine exhaust post-treatment systems, in particular to a ship engine SCR common rail type Tianlan injection system. Background technique [0002] Diesel engines are widely used in ships due to their superior economy, power and reliability. According to the statistics of Lloyds Classification Society, as of January 2011, the total number of ships in the world fleet has reached more than 100,000. With the rapid development of the world shipping industry, the demand for ships continues to grow. has attracted widespread attention. [0003] In view of the harm caused by NOX to the environment and human health, the International Maritime Organization has formulated Annex VI of the MARPOL73 / 78 Convention to restrict it. In the face of the upcoming third stage (Tier III standard) emission regulations, Urea-SCR technology is recognized as the most effective marine engine emission control solution at home an...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F01N3/28F01N9/00
CPCY02T10/40
Inventor 吕若菁喻洋
Owner 武汉添蓝发动机排放控制技术有限公司
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