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A kind of soot blowing device and soot blowing method for marine SCR reactor

A technology of SCR reactor and soot blowing device, which is applied to chemical instruments and methods, separation methods, and separation of dispersed particles, etc., can solve the problems of blocking porous channels of catalysts, inability to blow off catalyst surfaces, and poor reliability of soot blowing systems, etc., to achieve Improve soot blowing efficiency, save equipment cost, and improve service life

Active Publication Date: 2022-03-22
WUXI DONGFANG HIGH PERFORMANCE SHIP ENG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] 2. Selective Catalytic Reduction (SCR, Selective Catalytic Reduction) system can effectively reduce diesel engine NO x However, particulate matter such as soot in diesel engine exhaust gas and ammonium sulfate formed in the SCR system tend to accumulate on the surface of the catalyst in the SCR reactor, and even block the porous channels of the catalyst, causing the catalyst to lose its activity and reduce its catalytic activity.
The conventional reactor soot blowing system cannot quickly and effectively blow off the attachments on the surface of the catalyst, and the pressure stabilization time is short, so the reliability of the soot blowing system is poor

Method used

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  • A kind of soot blowing device and soot blowing method for marine SCR reactor
  • A kind of soot blowing device and soot blowing method for marine SCR reactor
  • A kind of soot blowing device and soot blowing method for marine SCR reactor

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Experimental program
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Embodiment 1

[0035] Embodiment 1 is a soot blowing device for an SCR reactor.

[0036] figure 1 It is a structural schematic diagram of an embodiment of the soot blowing device in the present invention. figure 2 for figure 1 Schematic diagram of the structure of the middle catalyst layer, soot blowing main pipe and soot blowing branch pipe. image 3 for figure 1 Schematic diagram of the structure of the first catalyst layer and the corresponding soot blowing main pipe and soot blowing branch pipe.

[0037] Such as Figure 1 ~ Figure 3 As shown, the SCR reactor 1 in Example 1 includes a first catalyst layer 9 , a second catalyst layer 10 and a third catalyst layer 11 arranged from top to bottom. The soot blowing device for the SCR reactor 1 includes a compressed medium storage tank 2, a filter 3, an air guide pipe frame 6 and a soot blowing pipe.

[0038] The compressed medium storage tank 2 is used to apply pressure conditions to the compressed gas and store it. The compressed gas ...

Embodiment 2

[0049] Embodiment 2 is a soot blowing device used in an SCR reactor. The difference between embodiment 2 and embodiment 1 is that the SCR reactor 1 in embodiment 2 is only provided with two catalyst layers, the first catalyst layer 9 and the second catalyst layer 10 from top to bottom.

[0050] Correspondingly, there are two airway tube frames 6 . The air inlets of the two air guide pipe frames 6 are connected in parallel to the air outlet of the filter 3 through the compressed medium pipe 5, which can ensure that the first catalyst layer 9 and the second catalyst layer 10 in the SCR reactor 1 are purged and cleaned at the same time.

[0051] In Embodiment 2, preferably, the soot blowing nozzle 12 has a variable diameter. Along the radial direction of the soot blowing main pipe 14, from the connection between the soot blowing main pipe 14 and the soot blowing branch pipe 8 to the direction away from the connection between the soot blowing main pipe 14 and the soot blowing bra...

Embodiment 3

[0054] Embodiment 3 is a soot blowing device for an SCR reactor. On the basis of Embodiment 1 or Embodiment 2, a differential pressure sensor 4 is provided between the inlet and the outlet of the SCR reactor 1 in Embodiment 3. There is also a data acquisition and monitoring system. And an electromagnetic valve 7 is installed at the air outlet of the air guide tube frame 6 . The electrical signal of the differential pressure sensor 4 is used to control the opening and closing of the solenoid valve 7. The data acquisition and monitoring system is connected to the differential pressure sensor 4 and the electromagnetic valve 7 of each air guide pipe frame; when the detection value of the differential pressure sensor 4 exceeds the specified value, the data acquisition and monitoring system controls the electromagnetic valve 7 to open, so that the soot blowing device starts to work, and the catalyst layer Perform soot blowing.

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PUM

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Abstract

The invention relates to a soot blowing device and a soot blowing method for a marine SCR reactor, the device is provided with multi-layer catalyst layers in the reactor; the soot blowing device includes a plurality of air guide pipe frames; each air guide pipe frame A group of air blowing pipes are communicated; the air blowing pipes are arranged below each layer of the catalyst layer; the air blowing pipes include a soot blowing main pipe and a soot blowing branch pipe; the air guiding pipe frame communicates with one end of the soot blowing main pipe; The other end of the soot blowing main pipe is rotatably fixed with at least one soot blowing branch pipe; soot blowing nozzles facing upward and perpendicular to the cross section of the catalyst layer are arranged on the soot blowing branch pipe. The invention adopts the vertical forceful blowing of the compressed medium, which not only has the characteristics of strong pertinence, wide coverage area, and no dead angle for dust removal, but also improves the service life of the catalyst and prolongs the replacement cycle of the catalyst, thereby improving the denitrification efficiency and saving operating costs.

Description

technical field [0001] The invention relates to a treatment device for marine diesel engine tail gas, in particular to a soot blowing device and a soot blowing method for a marine SCR reactor. Background technique [0002] 1. Environmental problems caused by global warming and air pollution have led to increasingly stringent controls on combustion emissions from power machinery. In the field of marine transportation, with the development of international shipping and ocean-going shipping, the exhaust gas produced by diesel-fueled marine engines has become a major source of pollution in coastal areas, especially ports. NO in Exhaust Gas from Marine Diesel Engines x Pollution to the atmospheric environment has aroused widespread concern in the international community. According to the latest regulations of the International Maritime Organization (IMO), since 2016, new ships in NO x Emission Control Areas (NECAs) must meet Tier III emission requirements. [0003] 2. Selecti...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01D53/94B01D53/56
CPCB01D53/9409
Inventor 黄泉水於克良刘少俊崔梦祺
Owner WUXI DONGFANG HIGH PERFORMANCE SHIP ENG