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Marine urea supply spraying device

A technology of injection device and urea, which is used in exhaust devices, mufflers, machines/engines, etc., can solve problems such as affecting the quality of exhaust gas treatment, higher exhaust gas temperature requirements, and increasing treatment costs, so as to ensure the uniformity of heating and improve the The effect of mixing quality and reducing energy consumption

Active Publication Date: 2022-08-09
ANQING MARINE ELECTRIC DEVICE
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Combined with the current situation of marine diesel engine exhaust emission control, the selective catalytic reduction method SCR, which is often used in industry, is applied to marine diesel engines. In the selective catalytic reduction SCR method, urea solution needs to be sprayed into the mixer, but this method has the following defects : The liquid urea solution directly enters the mixer and is vaporized and mixed with the exhaust gas at the temperature of the exhaust gas of the diesel engine. The temperature of the exhaust gas is relatively high. If the temperature of the exhaust gas is low, it is difficult to completely decompose the liquid urea solution, which will easily lead to crystallization in the mixer. , which affects the quality of waste gas treatment. Although the existing urea supply and injection device adopts the method of heating and decomposing the urea solution first and then spraying it into the mixer, the energy consumption is relatively serious when the urea solution is heated and decomposed, which greatly increases the treatment cost.

Method used

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  • Marine urea supply spraying device
  • Marine urea supply spraying device
  • Marine urea supply spraying device

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0039] see figure 1 , a marine urea supply injection device, comprising: a processor main body 1, an injection connection pipe 2, a processing part 3, a connection liquid pipe 4, a liquid inlet pipe 1 5, a liquid inlet pipe 2 6 and a pressure transmitter 7;

[0040] Among them, the shape of the processor main body 1 is a hollow cylinder, and the processor main body 1 is used for the reaction of the urea solution in it to form a mixture of ammonia gas and water vapor. main body 1;

[0041] The injection connection pipe 2 is arranged on the top side of the processor main body 1 and communicates with the inner cavity of the processor main body 1. The injection connection pipe 2 is provided with a solenoid valve for use with the pressure transmitter 7 which will be described in detail below. The other end of the connecting pipe 2 is actually connected to the external mixer, so that the exhaust gas discharged from the marine diesel engine is fully mixed in the mixer, and the mixed...

Embodiment 2

[0052] see Figure 2-3 , the heating part 31 includes: a split seat 311, a heat conducting sleeve 312, a connecting head 313, a hollow head 314, a spiral hollow support rod 319 and a heating element 3111;

[0053] Wherein, the shunt seat 311 is circular in shape, and an annular cavity is opened inside to facilitate gas flow, and the shunt seat 311 is fixedly embedded in the bottom of the processor body 1 and is coaxial with the processor body 1;

[0054] The heat-conducting sleeve 312 has a hollow cylindrical shape, and both ends are hollow. The bottom of the heat-conducting sleeve 312 can be rotatably connected to the top of the shunt 311 by means of a bearing. In an actual situation, the connection between the processor main body 1 and the heat-conducting sleeve 312 can be rotatably sealed through the bearing and the bearing sealing ring;

[0055] It should be noted that an air inlet communicated with the annular cavity is provided on the top of the shunt 311 and placed ins...

Embodiment 3

[0069] see Figure 3-4 , the heat storage part 32 includes: a thermal insulation shell 321, a honeycomb heat storage body 322, a connection seat 323, a liquid conduit 324 and a liquid outlet pipe 325;

[0070] Among them, the heat preservation shell 321 is arranged on the other side of the top of the L-shaped bracket connected with the hollow head 314, the shape of the heat preservation shell 321 is rectangular, and the heat preservation shell 321 is designed with an inner vacuum double layer;

[0071] The honeycomb regenerator 322 is arranged in the thermal insulation shell 321. The honeycomb regenerator 322 can preferably be a honeycomb ceramic regenerator. The honeycomb ceramic regenerator has the advantages of large specific surface area, large heat capacity, small thermal expansion coefficient, small exhaust resistance, and strength. High, good impact resistance, corrosion resistance, high temperature resistance, good thermal stability and above characteristics;

[0072]...

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Abstract

The invention discloses a marine urea supply and injection device in the technical field of urea supply and injection devices. The marine urea supply and injection device comprises a processor body; the treatment part is arranged in the treatment device main body, and the treatment part comprises a heat supply part arranged in the treatment device main body; and the heat storage part is arranged on the processor main body. According to the technical scheme, the heat supply part is arranged in the processor body, the heating uniformity of a urea solution is guaranteed, the urea solution is heated by the heat conduction sleeve in a rotating mode so that the urea solution can be rapidly decomposed, the energy consumption is reduced while the urea solution decomposition working efficiency is greatly improved, and the energy consumption is reduced. And the gas absorbing part of heat through the honeycomb heat accumulator enters the flowing cavity through the exhaust pipe, so that the injection connecting pipe has a certain temperature, the situation that more heat is lost when the decomposed urea solution is sprayed out through the injection connecting pipe is avoided, the decomposition quality of the urea solution is guaranteed, and the mixing quality of the urea solution entering the mixer and diesel engine waste gas is improved.

Description

technical field [0001] The invention relates to the technical field of urea supply and injection devices, in particular to a marine urea supply and injection device. Background technique [0002] With the deteriorating global environment and the gradual strengthening of people's awareness of environmental protection, air pollution caused by ships has attracted widespread attention from the international community. [0003] Combined with the current status of exhaust emission control of marine diesel engines, the selective catalytic reduction method SCR often used in the industry is applied to marine diesel engines. In the selective catalytic reduction method SCR, urea solution needs to be injected into the mixer, but this method has the following defects : The liquid urea solution directly enters the mixer and is vaporized and mixed with the exhaust gas at the temperature of the diesel engine exhaust gas. The temperature of the exhaust gas is relatively high. If the exhaust ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F01N3/20
CPCF01N3/2066F01N3/2006F01N2610/02F01N2610/1453Y02T10/12
Inventor 王良恩赵晓骏李智叶冰冰
Owner ANQING MARINE ELECTRIC DEVICE