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Urea injection system for boat and injection method of urea injection system

A urea injection system and urea technology, applied in exhaust gas treatment, mechanical equipment, engine components, etc., can solve the problems of large fluctuations in the pressure of urea solution, affecting the stable operation of the urea injection system, immature and popularization of marine SCR system technology, etc. , achieve huge economic benefits, good social benefits, reduce environmental pollution and waste of resources

Active Publication Date: 2016-04-06
CSSC NANJING LUZHOU ENVIRONMENT PROTECTION CO LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

When the flow rate of urea solution changes in a wide range, the pressure of urea solution fluctuates greatly, which affects the atomization effect of urea solution, and then affects the stable operation of urea injection system
[0005] To sum up, the marine SCR system technology is not yet mature and popular

Method used

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  • Urea injection system for boat and injection method of urea injection system
  • Urea injection system for boat and injection method of urea injection system

Examples

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Embodiment 1

[0036] A marine urea injection system in this embodiment includes a pump station, a urea solution pressure control unit 101 , a metering control unit 102 , and a nozzle spray gun unit 103 . The pump station and the urea solution pressure control unit are made into a skid-mounted overall structure, such as figure 2 shown.

[0037] like figure 1 As shown, the pump station unit includes a first ball valve 1, a first pressure gauge 2, a first filter 16, a second pressure gauge 3, and a second ball valve 17 connected in sequence; the outlet of the second ball valve 17 is connected in parallel to the third ball valve 5 And the fourth ball valve 21; the outlet of the third ball valve 5 is connected with the first single screw pump 4; the outlet of the first single screw pump 4 is connected with the fifth ball valve 6 after connecting the first check valve 7; the outlet of the fifth ball valve 6 is connected Pump cleaning fluid pipeline; the outlet of the fourth ball valve 21 is co...

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Abstract

The invention relates to a urea injection system for a boat. The system comprises a pump station unit, a urea solution pressure control unit, a metering control unit and a nozzle and spray gun unit, wherein the metering control unit comprises a urea solution module, a compressed air atomizing module and a compressed air blowing module; the pump station unit is sequentially communicated with a urea solution pressure control unit pipeline, the urea solution module and the nozzle and spray gun unit via pipelines; the compressed air atomizing module and the compressed air blowing module are communicated with the nozzle and spray gun unit after being connected in parallel. By action of the system disclosed by the invention, the supplied urea solution is constant in pressure within a range that the required maximal flow rate is about 4 times the minimal flow rate. Finally, an SCR system for the boat can be successfully applied to treatment of tail gas NOx of a marine diesel engine; the efficiency is above 98%; environmental pollution and waste of resources are reduced; the concentration of emissions of the marine diesel engine reaches the standards and satisfies the Tier III standards.

Description

technical field [0001] The invention relates to a low-speed diesel engine tail gas nitrogen oxide compound NOx emission aftertreatment device, in particular to a marine urea injection system and an injection method thereof, belonging to the field of ship machinery. Background technique [0002] As far as the applicant knows, in the field of ship exhaust emission and pollution prevention, the NOx emission control standards are mainly based on the Amendment to MAPOL Annex VI passed by the International Maritime Organization (IMO) in October 2008. In terms of NOx emission control, the amendment requires that the NOx emission of diesel engines installed on ships built on or after January 1, 2016 (when the ship is sailing in the control area) must meet the Tier III standard, that is, the emission limit is: low speed Machine (n<130r / min) is 3.4g / (kW h); medium speed machine (n=130~2000r / min) is 9×n-0.2g / (kW h); high speed machine (n>2000r / min) is 2.0g / (kW·h). [0003] If ...

Claims

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Application Information

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IPC IPC(8): F01N3/20F01N3/28F01N9/00
CPCF01N3/206F01N3/2066F01N3/28F01N9/00F01N2590/02F01N2610/02F01N2610/1453F01N2610/146Y02T10/12Y02T10/40
Inventor 陈纪赛檀净秦海燕
Owner CSSC NANJING LUZHOU ENVIRONMENT PROTECTION CO LTD
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