JPH02146213A - Method for mixing aqueous ammonia with exhaust gas of internal combustion engine - Google Patents

Abstract

PURPOSE:To conduct mixing of aqueous ammonia with exhaust gas simply and securely by arranging a nozzle for ejecting the aqueous ammonia at the corner part of a pipe in which the exhaust gas flows in a direction contrary to an exhaust gas flowing direction. CONSTITUTION:In an exhaust gas installation 2 continuously provided with an internal combustion engine 1 via a pipe 3, an exhaust gas denitration device 4 using ammonia for countermeasure of nitrogen oxides in exhaust gas and an aquenous ammonia ejection nozzle 6 with an ammonia mixer 5 for ejecting aquenous ammonia to the exhaust gas in the pipe 3 at the upperstream thereof. The aquenous ammonia ejection nozzle 6 is fitted to the corner part of the pipe 3 in a direction contrary to the flow of the exhaust gas. Consequently, the exhaust gas flowing in the pipe 3 and the aquenous ammonia ejected from the nozzle 6 are mixed efficiently and sufficiently.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a method for mixing aqueous ammonia with exhaust gas of an internal combustion engine equipped with an exhaust gas denitrification device.

[Prior Art and Issues] Is it possible to install an exhaust gas denitrification device that uses ammonia to an internal combustion engine as a countermeasure against nitrogen oxides (NOX) in the exhaust gas of an internal combustion engine, and if so, how can the exhaust gas be removed? It is necessary to mix the ammonia water with the exhaust gas in front of the il'i device.

Conventionally, when mixing the above-mentioned ammonia water with exhaust gas, an ammonia water injection nozzle for injecting ammonia water into the exhaust gas is generally attached to the inlet of the reactor main body of the exhaust gas denitrification device. There was a problem that the mixing was not always done sufficiently.

[Means for Solving the Problems] In order to solve the above-mentioned problems, the present invention provides a method of mixing ammonia water with exhaust gas of an internal combustion engine equipped with an exhaust gas denitrification device, which comprises using an ammonia water injection nozzle. , installed at a corner of the exhaust gas piping leading from the internal combustion engine to the exhaust gas denitrification device in a direction opposite to the flow of the exhaust gas, and injecting ammonia water from the ammonia water injection nozzle in the direction opposite to the flow of the exhaust gas. The object of the present invention is to provide a method for mixing ammonia water with exhaust gas from an internal combustion engine, which is characterized in that it is mixed with exhaust gas.

[Embodiment] An embodiment of the method of mixing ammonia water with exhaust gas of an internal combustion engine according to the present invention will be described below with reference to FIGS. 1 and 2.

Fig. 1 is a diagrammatic explanatory diagram of an embodiment of an exhaust gas equipment including an ammonia water injection nozzle for carrying out the method of the present invention, and Fig. 2 is an exhaust gas piping included in the exhaust gas equipment of Fig. 1. FIG. 2 is a diagrammatic explanatory diagram of a curved corner portion and an ammonia water injection nozzle.

In FIG. 1, 1 is an internal combustion engine used, for example, in a diesel power generator, and 2 is an exhaust gas facility for processing and discharging exhaust gas from the internal combustion engine 1, which is connected to the internal combustion engine 1 via a pipe 3. has been done.

The exhaust gas equipment 2 includes an exhaust gas denitrification device 4 that uses ammonia as a countermeasure against nitrogen oxides (NOX) in the exhaust gas, and an ammonia mixer 5 equipped with an ammonia mixer 5 for injecting ammonia water into the exhaust gas in the piping 3 upstream thereof. A water injection nozzle 6 is included, and an ammonia water injection nozzle 6 is included.
As shown in FIG. 2, the pipe 3 is attached to a curved corner 3a in the middle of the pipe 3 facing in the direction opposite to the flow of exhaust gas.

In addition to the exhaust gas denitrification device 4 described above, the exhaust gas equipment 2 includes a gas water heat exchanger installed downstream thereof, but this gas water heat exchanger is not related to the present invention, so illustration and description thereof will be omitted. .

The method of mixing ammonia water with the exhaust gas of an internal combustion engine according to the present invention is carried out using the exhaust gas equipment shown in FIG. The ammonia water is injected from an ammonia water injection nozzle 6 attached to the exhaust gas in the direction opposite to the flow of the exhaust gas and mixed with the exhaust gas.

Nao, in the description of the above embodiment, a configuration was described in which the ammonia water injection nozzle 6 was attached only to one corner portion 3a facing in the opposite direction to the flow of exhaust gas, but between the internal combustion engine 1 and the exhaust gas denitrification device 4. multiple curved corner portions 3a
A plurality of ammonia water injection nozzles 6 may be provided at each of the plurality of curved corner portions 3a using a similar method.

[Effects of the Invention] Since the method of mixing ammonia water with the exhaust gas of an internal combustion engine according to the present invention is configured as described above, there is an effect that the ammonia water is sufficiently mixed with the exhaust gas.

[Brief explanation of the drawing]

Fig. 1 is a diagrammatic explanatory diagram of an embodiment of exhaust gas equipment including an ammonia water injection nozzle for carrying out the method of the present invention, and Fig. 2 is an exhaust gas piping included in the exhaust gas equipment of Fig. 1. FIG. 2 is an enlarged diagrammatic explanatory diagram of a curved corner portion and an ammonia water injection nozzle. l ... 2 ... 3 ... 3a ... 4 ... 5 ... 6 ... Internal combustion engine exhaust gas equipment Exhaust gas piping bend Partial exhaust gas denitrification device Ammonia mixer Ammonia water injection nozzle Agent Patent attorney Attorney Takeo Goto Patent Attorney Haruya Saifuji

Claims (1)

[Claims] A method of mixing ammonia water with the exhaust gas of an internal combustion engine equipped with an exhaust gas denitrification device, the ammonia water injection nozzle being connected to a corner of an exhaust gas pipe leading from the internal combustion engine to the exhaust gas denitrification device, in order to mix the flow of the exhaust gas. Mixing ammonia water with the exhaust gas of an internal combustion engine, characterized in that the ammonia water is installed facing in the opposite direction, and the ammonia water is injected from the ammonia water injection nozzle in the opposite direction to the flow of the exhaust gas to mix it with the exhaust gas. Method.