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Urea circulation system used in SCR system

A technology of SCR system and circulation system, applied in exhaust gas treatment, mechanical equipment, engine components, etc., can solve the problems of large loss, long equipment running time, waste of resources, etc.

Active Publication Date: 2019-10-11
GUANGZHOU WENCHONG SHIPYARD CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The urea cycle system of the SCR system usually includes generators, urea tanks, urea pumps, and urea tanks. The urea tank, also known as the urea tank, is used to store the urea solution. The main function of the urea pump is to pump the urea solution in the urea tank. And maintain a certain pressure, deliver to the injection unit, the displacement of the urea pump used in the general generator is 900L / h, according to the data provided by the generator manufacturer, the urea consumption is 9% of the generator load, according to the power generation Calculated at 100% load of the machine, the actual urea consumption is 12L / h, while the displacement of a single urea pump reaches 900L / h, the displacement of the urea pump is obviously too large, resulting in a state of oversupply
[0003] The urea pump in the existing generator SCR system continuously delivers urea to the urea pipe for 24 hours, and the excess unused urea in the system will flow back to the urea tank through the return pipe for collection, so as to circulate, this During the process, the equipment runs for a long time and consumes a lot, resulting in a waste of resources

Method used

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  • Urea circulation system used in SCR system
  • Urea circulation system used in SCR system
  • Urea circulation system used in SCR system

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Embodiment Construction

[0022] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some, not all, embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without creative efforts fall within the protection scope of the present invention.

[0023] In the description of the present invention, it should be understood that the orientation or positional relationship indicated by the terms "upper", "lower", "left", "right" etc. is based on the orientation or positional relationship shown in the drawings, and is only for It is convenient to describe the present invention and simplify the description, but does not indicate or imply that the device or element referred to must have a specific orientation, be co...

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Abstract

The invention provides a urea circulation system used in an SCR system. The urea circulation system comprises a urea pump, a cabin for storing urea, a connecting pipe for maintaining pressure balanceand a plurality of urea tanks used for being in one-to-one corresponding communication with power generators. The cabin communicates with the input end of the urea pump. The urea tanks communicate with the output end of the urea pump. The urea tanks are in communication through the connecting pipe. A high-liquid-level control device and a low-liquid-level control device are arranged in each urea tank and are electrically connected with a switch of the urea pump. The urea circulation system can automatically control supplementing and stopping of the urea pump so that the urea usage amount can be reliably controlled, resource waste is prevented, and excessive consumption caused by long-time running of equipment can be effectively avoided.

Description

technical field [0001] The invention relates to the field of a post-treatment system discharged from a generator, in particular to a urea cycle system used in an SCR system. Background technique [0002] Selective Catalytic Reduction (SCR) is a technology that targets NO in diesel vehicle exhaust emissions. X A treatment process, that is, under the action of a catalyst, the reducing agent ammonia or urea is injected to remove the NO in the tail gas X reduced to N 2 and H 2 O, this technology is also widely used in after-treatment of diesel engine exhaust. By optimizing the fuel injection and combustion process, the generation of particulate PM is controlled as much as possible inside the engine, and then the nitrogen oxides formed under oxygen-enriched conditions are treated outside the engine, so that the vehicle can be used in a timely manner. Nitrogen oxides (NO X ) for selective catalytic reduction, so as to achieve the purpose of both energy saving and emission redu...

Claims

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Application Information

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IPC IPC(8): F01N3/20
CPCF01N3/2066F01N3/208F01N2570/14F01N2610/02F01N2610/144Y02T10/12
Inventor 李泉陈灵超李娜陆佳王小刚黄浩文
Owner GUANGZHOU WENCHONG SHIPYARD CO LTD
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