Marine diesel engine waste gas desulfurization and denitrification treatment device

Abstract

The invention discloses a marine diesel engine waste gas desulfurization and denitrification treatment device which comprises a mixing pipe assembly, a catalytic device, a soot blowing pipe assembly, a bypass pipeline, an electromagnetic valve and a thermometer. The fixed adjusting device and the manhole sealing device are mounted on the catalytic device, so that a catalyst can effectively and completely react and filter waste gas from a mixing pipe. And the manhole sealing device effectively prevents air leakage of equipment. A part of diesel engine waste gas enters the mixing pipe through the gas inlet, urea is jetted into the flue gas, and the fan blades mix and reflect airflow and urea. And entering a catalytic device, and effectively carrying out desulfurization and denitrification treatment through a catalyst. And a soot blowing pipeline is arranged on the catalytic device and is used for blowing away dust concentrated in a catalyst in the catalytic device at regular time, so that the cleanliness of the catalyst filtering device is ensured. And the other part of gas enters from the tail side of the catalytic device through the bypass pipeline for cyclic catalysis, so that the problems of complete reaction of the catalyst and gas sealing of the device are solved, and the use efficiency of the catalyst and the quality of discharged gas are improved.

Description

Technical Field

[0001] The invention relates to a desulfurization and denitration treatment device for exhaust gas from a marine diesel engine, which is a device capable of desulfurizing and denitrifying exhaust gas from a diesel engine, and meets emission requirements and belongs to the field of automated environmental protection technology. Background Art

[0002] In the process of exhaust gas treatment, urea needs to be injected into the mixing tube for the first chemical reaction of the exhaust gas, and then it enters the catalytic device for dechlorination and denitrification through the catalyst. At present, the main method of fixing the catalyst is to tighten the grid with a wire. However, the catalytic effect is insufficient due to the looseness of the upper and lower parts. In addition, since the exhaust gas is often accompanied by dust, it can be removed from the manhole through the soot blowing pipeline, but it causes serious leakage at the manhole and cannot be sealed. The previous use of ordinary flat gaskets for sealing could not achieve the desired effect, which caused exhaust gas leakage and affected environmental protection to a certain extent. Summary of the invention

[0003] In order to solve the above problems, the present invention provides a marine diesel engine exhaust gas desulfurization and denitrification treatment device, which has a high degree of automation and environmental protection, good reliability and continuous production.

[0004] The technical solution of the present invention is: a desulfurization and denitrification treatment device for exhaust gas from a marine diesel engine, comprising a mixing tube assembly, a catalytic device, a sootblowing pipe assembly, a bypass pipeline, a solenoid valve and a thermometer, both ends of the bypass pipeline are connected to the mixing tube assembly by bolts; the mixing tube assembly and the catalytic device are connected by bolts; the injector is connected to the mixing tube assembly by a threaded joint; a fan blade agitator is arranged on the inner side of the mixing tube of the mixing tube assembly; the fan blade agitator is connected to the mixing tube by fixing bolts; the sootblowing pipe assembly is installed on the top of the catalytic device by bolt connection, and the dust on the catalyst is blown to the inlet side by injecting compressed air, and the dust is regularly cleaned out from the manhole; the solenoid valve is connected to the sootblowing assembly and the catalytic device body by bolts to control the compressed air to perform sootblowing at a fixed time; the thermometer is installed on the inlet and outlet pipes of the catalytic device to detect the exhaust gas temperature.

[0005] Furthermore, the catalytic device comprises a catalyst, a catalyst tightening device and a manhole sealing device; the catalyst is locked by the catalyst tightening device; and the manhole sealing device is installed in front of the catalytic device.

[0006] Furthermore, each set of catalysts is provided with soot blowing pipelines on both sides.

[0007] Furthermore, the bypass pipeline includes curved pipe sections at both ends and a straight pipe section in the middle; both ends of the straight pipe section and the curved pipe section are connected by a corrugated pipe.

[0008] Furthermore, the number of catalysts installed is determined according to the exhaust gas flow rate, and each group of catalysts is stacked and tightened with grilles on both sides.

[0009] Furthermore, the catalyst tightening device is installed on the top of the catalyst device and locks the catalyst by bolts; the catalyst tightening device includes a bolt, a clamping block rotatably installed at the bottom of the bolt, the bolt is threadedly connected to the threaded sleeve at the top of the catalyst device, and a knob is installed on the top of the bolt.

[0010] Furthermore, the manhole sealing device is a sealing ring.

[0011] The beneficial effects of the present invention are: The device of the present invention has a simple structure and obvious effect. The catalyst tightening device is installed on the top of the catalytic device, and the catalyst is locked by bolts to prevent up and down movement to ensure the use of the catalyst and improve efficiency. The manhole sealing device is installed in front of the catalytic device to prevent the exhaust gas from leaking through the manhole. The problem of incomplete catalysis during the exhaust gas catalytic reaction is successfully solved, which not only reduces the risk of exhaust gas leakage, but also makes the exhaust gas fully treated to meet environmental emission requirements. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] The present invention will be further described below in conjunction with the accompanying drawings and embodiments.

[0013] Figure 1 It is a structural schematic diagram of the present invention.

[0014] Numbers in the figure: 1-mixing tube assembly, 1-1 ejector, 2-catalytic device, 2-1 sootblower assembly, 2-2 solenoid valve, 2-3 catalyst, 2-4 catalyst tightening device, 2-5 manhole sealing device, 3-bypass pipeline. DETAILED DESCRIPTION

[0015] The technical solution of the present invention will be clearly and completely described below through specific implementation methods.

[0016] refer to Figure 1The invention discloses a marine diesel engine exhaust gas desulfurization and denitration treatment device, comprising a mixing tube assembly 1, a catalytic device 2, a soot blowing tube assembly 2-1, a bypass pipeline 3, a solenoid valve 2-2 and a thermometer 2-6, wherein both ends of the bypass pipeline 3 are connected to the mixing tube assembly 1 by bolts; the mixing tube assembly 1 and the catalytic device 2 are connected by bolts; the injector 1-1 is mounted on the mixing tube assembly 1 and connected by a threaded joint; the mixing tube assembly 1 is provided with a blade stirrer on the inner side of the mixing tube; the blade stirrer is connected to the mixing tube by fixing bolts; Pipe connection; the sootblowing pipe assembly 2-1 is installed on the top of the catalytic device through bolt connection, and the dust on the catalyst is blown to the inlet side by injecting compressed air, and the dust is regularly cleaned out from the manhole; the solenoid valve 2-2 is connected to the sootblowing assembly 2-1 and the catalytic device 2 body through bolts to control the compressed air to blow soot regularly; the catalyst 2-3 is arranged inside the catalytic device 2; the catalyst 2-3 is locked by the catalyst tightening device 2-4; the manhole sealing device 2-5 is installed in front of the catalytic device 2; the thermometer 2-6 is installed on the inlet and outlet pipes of the catalytic device 2 to effectively detect the exhaust gas temperature.

[0017] In this embodiment, soot blowing pipelines are provided on both sides of each group of catalysts.

[0018] In this embodiment, the bypass pipeline 3 includes curved pipe sections at both ends and a straight pipe section in the middle; the two ends of the straight pipe section and the curved pipe section are connected by a corrugated pipe.

[0019] In this embodiment, the number of catalysts installed is determined according to the exhaust gas flow rate, and each group of catalysts is stacked and tightened with grilles on both sides.

[0020] The catalytic device comprises a catalyst, a catalyst tightening device and a manhole sealing device; the catalyst is locked by the catalyst tightening device; and the manhole sealing device is installed in front of the catalytic device.

[0021] The present invention ensures that the catalyst can effectively and completely react and filter the exhaust gas coming from the mixing tube by installing a fixed adjustment device and a manhole sealing device on the catalytic device. The catalyst tightening device is installed on the top of the catalytic device, and the catalyst is locked by bolts to prevent up and down movement to ensure the efficiency of the catalyst. The manhole sealing device effectively prevents equipment leakage. The quality of exhaust gas treatment catalysis and sealing is improved, and continuous operation can be achieved.

[0022] A portion of the diesel exhaust gas enters the mixing tube through the air inlet. The urea injection device is installed in the mixing tube to inject urea into the flue gas. The airflow and urea are mixed and reacted through the fan blades. After entering the catalytic device, the catalyst is used to effectively carry out desulfurization and denitrification treatment, and the gas that meets the emission requirements is discharged at the outlet. The soot blowing pipeline installed on the catalytic device is controlled by the solenoid valve to regularly blow away the dust concentrated on the catalyst in the catalytic device to ensure the cleanliness of the catalyst filter device. The other part of the gas enters from the tail side of the catalytic device through the bypass pipeline for circulating catalysis, which successfully solves the problems of complete catalyst reaction and gas sealing device, and improves the efficiency of catalyst use and the quality of exhaust gas.

[0023] Finally, it should be noted that: although the present invention and its advantages have been described in detail above, it should be understood that various changes, substitutions and transformations can be made without exceeding the spirit and scope of the present invention as defined by the appended claims. Moreover, the scope of the present invention is not limited to the specific embodiments of the processes, devices, means, methods and steps described in the specification. It will be easily understood by those of ordinary skill in the art from the disclosure of the present invention that existing and future processes, devices, means, methods or steps that perform substantially the same functions as the corresponding embodiments described herein or obtain substantially the same results as the corresponding embodiments described herein can be used according to the present invention. Therefore, the appended claims are intended to include such processes, devices, means, methods or steps within their scope.

Claims

1. A marine diesel engine exhaust gas desulfurization and denitrification treatment device, characterized in that: The invention comprises a mixing tube assembly (1), a catalytic device (2), a sootblowing tube assembly (2-1), a bypass pipeline (3), a solenoid valve (2-2) and a thermometer (2-6), wherein both ends of the bypass pipeline (3) are connected to the mixing tube assembly (1) by bolts; the mixing tube assembly (1) and the catalytic device (2) are connected by bolts; the mixing tube assembly (1) is connected to an injector (1-1) by a threaded joint; a fan blade stirrer is arranged on the inner side of the mixing tube of the mixing tube assembly (1); the fan blade stirrer is connected to the mixing tube by fixing bolts; the sootblowing tube assembly (2-1) is installed on the top of the catalytic device by bolts, and dust on the catalyst is blown to the inlet side by injecting compressed air, and dust is regularly cleaned out from the manhole; the solenoid valve (2-2) is connected to the sootblowing assembly (2-1) and the catalytic device (2) body by bolts, and controls the compressed air to perform sootblowing at a fixed time; the thermometer (2-6) is installed on the inlet and outlet pipes of the catalytic device (2) and is used to detect the exhaust gas temperature.

2. A marine diesel engine exhaust gas desulfurization and denitrification treatment device according to claim 1, characterized in that: The catalytic device (2) comprises a catalyst (2-3), a catalyst tightening device (2-4) and a manhole sealing device (2-5); the catalyst (2-3) is locked by the catalyst tightening device (2-4); and the manhole sealing device (2-5) is installed in front of the catalytic device (2).

3. A marine diesel engine exhaust desulfurization and denitrification treatment device according to claim 1, characterized in that: Each set of catalysts is equipped with soot blowing pipes on both sides.

4. A marine diesel engine exhaust desulfurization and denitrification treatment device according to claim 1, characterized in that: The bypass pipeline (3) comprises curved pipe sections at both ends and a straight pipe section in the middle; the two ends of the straight pipe section and the curved pipe section are connected via a corrugated pipe.

5. The desulfurization and denitrification treatment device for marine diesel engine exhaust gas according to claim 1, characterized in that: The number of catalysts installed is determined by the exhaust gas flow rate. Each group of catalysts is stacked and tightened with grilles on both sides.

6. A marine diesel engine exhaust gas desulfurization and denitrification treatment device according to claim 1, characterized in that: The catalyst tightening device (2-4) is installed on the top of the catalyst device (2) and locks the catalyst by bolts; the catalyst tightening device (2-4) comprises a bolt, a clamping block rotatably installed at the bottom of the bolt, the bolt is threadedly connected to the threaded sleeve at the top of the catalyst device (2), and a knob is installed at the top of the bolt.

7. The desulfurization and denitrification treatment device for marine diesel engine exhaust gas according to claim 1, characterized in that: The manhole sealing device (2-5) is a sealing ring.

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