SCR tail gas treatment system
The SCR exhaust gas treatment system addresses the challenge of meeting IMO III emission standards by integrating a diesel engine with a mixing chamber, SCR reactor, and storage cabinet, achieving efficient NOx reduction and space-efficient design.
Patent Information
- Application Number
- CN202420168989.6
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-01-23
- Publication Date
- 2024-12-10
- Estimated Expiration
- 2034-01-23
AI Technical Summary
Existing ship diesel engines struggle to meet the stringent IMO III emission standards for nitrogen oxides (NOx) and sulfur oxides (SOx), particularly in specific emission control areas, necessitating advanced emission control technologies like selective catalytic reduction (SCR) systems but requiring more efficient integration and space optimization.
An SCR exhaust gas treatment system comprising a diesel engine connected to a mixing chamber, SCR reactor, and storage cabinet, with a retractable connecting section and control box, utilizing urea SCR technology to reduce NOx emissions through catalytic reactions.
The system upgrades exhaust gas from IMO II to IMO III emission standards, optimizes space usage by integrating the mixing chamber and SCR reactor as a muffler, and effectively reduces NOx emissions.
Smart Images
Figure CN222141356U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the field of ships, and in particular to an SCR tail gas treatment system. Background Art
[0002] IMO II emissions refer to the second phase of ship emission standards established by the International Maritime Organization. IMO II emission standards mainly require ships to reduce the emission of atmospheric pollutants during navigation, especially nitrogen oxides (NOx) and sulfur oxides (SOx). At present, most ship diesel engine emissions are required to meet IMOII emissions. IMO III emission standards require that ships in specific emission control areas, such as European countries, engine NOx emissions shall not exceed 6.0 grams / kWh, and sulfur dioxide emissions shall not exceed 0.1%. The implementation of this standard will help reduce pollution to the environment from ships, improve air quality, and reduce the formation of acid rain. In order to meet IMO III requirements, ships usually need to adopt more advanced emission control technologies, such as selective catalytic reduction (SCR) systems or low-sulfur fuels. The original IMO II emission standards cannot meet the IMOIII emission standards. Utility Model Content
[0003] In order to solve the above problems, the present technical solution provides an SCR tail gas treatment system.
[0004] To achieve the above purpose, the technical solution is as follows:
[0005] An SCR exhaust gas treatment system comprises a diesel engine, wherein the diesel engine is connected to an exhaust pipe, the exhaust pipe is connected to a mixing chamber, one end of the mixing chamber is connected to an SCR reactor, and the SCR reactor is connected to an SCR storage cabinet.
[0006] In some embodiments, a control box electrically connected to the mixing chamber is also included.
[0007] In some embodiments, a retractable connecting section is provided between the exhaust pipe and the mixing chamber.
[0008] The beneficial effects of this application are:
[0009] The main engine exhaust gas can be upgraded from IMO II emission standard to IMO III emission standard after SCR treatment. In addition, the direct connection between the mixing chamber and the SCR reactor can act as a muffler, saving the installation space of a muffler, which is more conducive to the layout of equipment in the narrow cabin space. BRIEF DESCRIPTION OF THE DRAWINGS
[0010] In order to more clearly illustrate the technical solutions in the embodiments of the present utility model, the following briefly introduces the drawings required for describing the embodiments.
[0011] Figure 1 It is a structural schematic diagram of an embodiment of the utility model. DETAILED DESCRIPTION
[0012] In order to make the technical problems, technical solutions and beneficial effects solved by the utility model more clear, the utility model is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the utility model and are not used to limit the utility model.
[0013] Please refer to Figure 1 As shown, an SCR exhaust gas treatment system includes a diesel engine 1, wherein the diesel engine 1 is connected to an exhaust pipe 2, the exhaust pipe 2 is connected to a mixing chamber 3, one end of the mixing chamber 3 is connected to an SCR reactor 4, the SCR reactor 4 is connected to an SCR storage cabinet 5, and also includes a control box 6 electrically connected to the mixing chamber 3.
[0014] The urea aqueous solution is injected into the mixing chamber from the SCR storage cabinet and evaporates in the high-temperature exhaust gas. The nitrogen oxides (NOx) in the exhaust gas react with the evaporated urea to generate nitrogen monoxide (NO) and carbon dioxide (CO2). The generated nitrogen monoxide (NO) further reacts with the oxygen in the exhaust gas to generate nitrogen dioxide (NO2). The exhaust gas and ammonia (NH3) and nitrogen dioxide are guided to the SCR reactor. The nitrogen dioxide (NO2) and ammonia (NH3) in the SCR catalyst react on the catalyst surface to generate water (H2O) and nitrogen. Through this catalytic reaction process, urea SCR technology effectively reduces the emission of nitrogen oxides (NOx) in the exhaust gas. The working principle of SCR urea is based on the chemical reaction between urea and nitrogen oxides, which reduces pollution to the environment by selectively removing nitrogen oxides.
[0015] In this embodiment, a retractable connecting section 7 is provided between the exhaust pipe 2 and the mixing chamber 3, which can adjust the length and allow the mixing chamber to adapt to exhaust pipes of different lengths.
[0016] The above description is only a preferred embodiment of the present application and is not intended to limit the scope of implementation of the present application. Other principles and basic structures that are the same or similar to those of the present application are within the protection scope of the present application.
Claims
1. An SCR tail gas treatment system, characterized in that: The invention comprises a diesel engine (1), wherein the diesel engine (1) is connected to an exhaust pipe (2), the exhaust pipe (2) is connected to a mixing chamber (3), one end of the mixing chamber (3) is connected to an SCR reactor (4), and the SCR reactor (4) is connected to an SCR storage cabinet (5).
2. The SCR tail gas treatment system according to claim 1, characterized in that: It also includes a control box (6) electrically connected to the mixing chamber (3).
3. The SCR tail gas treatment system according to claim 1, characterized in that: A telescopic connecting section (7) is provided between the exhaust pipe (2) and the mixing chamber (3).