A device for controlling black smoke during marine diesel engine testing

Abstract

This utility model provides a device for controlling black smoke during marine diesel engine testing. Its features include: a housing comprising a lower silencing chamber and an upper filter chamber, which are connected; an air inlet is located on one side of the silencing chamber; multiple metal filter elements are distributed within the filter chamber, with the axial direction of the filter elements being vertical; air enters from the sides of the metal filter elements and exits from the top; an air outlet is located at the top of the filter chamber; and a pulse jet system is located above the housing and connected to the filter chamber. This utility model's device for controlling black smoke during marine diesel engine testing overcomes the problems of existing devices, such as complex structure, difficulty in cleaning filter materials, high noise levels, and difficult maintenance.

Description

Technical Field

[0001] This utility model relates to the field of waste gas treatment technology, specifically to a device for treating black smoke during the testing of marine diesel engines in shipbuilding enterprises. Background Technology

[0002] Marine diesel engines undergo full-engine testing before leaving the factory. The black smoke produced during the testing process not only pollutes the surrounding environment but also harms the health of the testing personnel.

[0003] Common methods for controlling black smoke from marine diesel engine testing include baghouse dust collectors, electrostatic precipitators, and particulate filters. Baghouse dust collectors, however, have filter bags with low temperature resistance, making them unsuitable for direct use and requiring upstream flue gas cooling equipment, resulting in a complex overall system. Electrostatic precipitators utilize high-voltage DC to electrostatically capture electrically charged carbon particles, but their filtration efficiency is low, and the equipment is bulky and expensive. Particulate filters offer high filtration efficiency, but commonly used filter materials include ceramics and metal mesh. Failure to promptly clean particles from these materials can cause clogging, increase back pressure, and reduce diesel engine performance. Furthermore, the noise pollution from marine diesel engine exhaust during testing is also significant.

[0004] Therefore, there is an urgent need for a high-temperature resistant, high-efficiency, noise-reducing, and easy-to-maintain marine diesel engine test smoke treatment device to solve the problems existing in the current test smoke treatment device technology. Utility Model Content

[0005] In order to solve the above problems, the present invention aims to provide a device for treating black smoke during marine diesel engine testing, which overcomes the problems of complex structure, difficult cleaning of filter materials, high noise and difficult operation and maintenance of existing devices.

[0006] To achieve the above objectives, the present invention adopts the following technical solution:

[0007] This utility model provides a device for treating black smoke during marine diesel engine testing. The device includes a housing, comprising a lower silencing chamber and an upper filter chamber, which are connected. An air inlet is located on one side of the silencing chamber. Multiple metal filter elements are distributed within the filter chamber, with the axial direction of each filter element being vertical. Air enters from the sides of the filter elements and exits from the top. An air outlet is located at the top of the filter chamber. A pulse jet system is located above the housing and connected to the filter chamber.

[0008] Furthermore, the marine diesel engine test smoke treatment device provided by this utility model may also have the following features: the metal filter element is a 316L stainless steel metal filter element with a temperature resistance of 500℃, and the filtration accuracy of the metal filter element is 0.1μm~10μm.

[0009] Furthermore, the marine diesel engine test smoke treatment device provided by this utility model may also have the following feature: a perforated plate is provided at the lower end of the filter chamber.

[0010] Furthermore, the marine diesel engine test black smoke treatment device provided by this utility model may also have the following features: the pulse jet system includes: a pulse controller, an electromagnetic pulse valve, a jet pipe assembly and an air tank. The jet pipe assembly is provided with multiple jet pipes, the nozzles of the multiple jet pipes correspond to the upper ends of multiple metal filter elements, there are multiple electromagnetic pulse valves, which are respectively installed on the multiple jet pipes, and the electromagnetic pulse valves are electrically connected to the pulse controller. The jet pipes are connected to the air tank.

[0011] Furthermore, the marine diesel engine test smoke treatment device provided by this utility model may also have the following features: a ladder guardrail is provided on the outer side of the device housing.

[0012] Furthermore, the marine diesel engine test smoke treatment device provided by this utility model may also have the following features: an inspection hole is provided on the other side of the silencing chamber, and the flange at the inspection hole is sealed.

[0013] Furthermore, the marine diesel engine test smoke treatment device provided by this utility model may also have the following features: the side of the silencing chamber is provided with diagonal reinforcing ribs.

[0014] Compared with the prior art, the present invention has the following beneficial effects:

[0015] The marine diesel engine test smoke treatment device provided by this utility model reduces gas noise through the silencing chamber, and the metal filter element in the filter chamber is heat-resistant and has high filtration efficiency. The black smoke gas can be purified after being treated by this device. The marine diesel engine test smoke treatment device of this utility model has the advantages of simple structure, high temperature resistance, pulse backflushing to clean the filter element, high filtration efficiency, low overall resistance, and reduced test exhaust noise pollution. It does not add extra back pressure during the test run of the marine diesel engine. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the structure of the marine diesel engine test black smoke treatment device in this utility model embodiment;

[0017] Figure 2 This is a structural side view of the marine diesel engine test smoke treatment device in this embodiment of the present invention.

[0018] Reference numerals: Filter chamber 1; Perforated plate 11; Metal filter element 2; Pulse jet system 3; Jet pipe 31; Electromagnetic pulse valve 32; Air tank 33; Silencing chamber 4; Angled reinforcing rib 41; Air inlet 5; Air outlet 6; Inspection hole 7; Ladder guardrail 8. Detailed Implementation

[0019] To make the technical means, creative features, objectives and effects of this utility model easy to understand, the following embodiments, in conjunction with the accompanying drawings, will specifically illustrate the technical solution of this utility model.

[0020] See Figure 1 and Figure 2 This embodiment provides a device for treating black smoke during marine diesel engine testing, including a device housing. The device housing includes a silencing chamber 4 located below and a filter chamber 1 located above, and the filter chamber 1 is connected to the silencing chamber 4.

[0021] The silencing chamber 4 is used to effectively reduce the noise of black smoke gases produced during the testing of marine diesel engines. The silencing chamber 4 is modified from a commercially available resonant silencer. Resonant silencers utilize a resonant cavity to absorb or cancel noise at specific frequencies, thereby reducing noise. One side of the silencing chamber 4 has an air inlet 5 for the entry of black smoke gases from the marine diesel engine during testing. The other side of the silencing chamber 4 has an inspection hole 7 for easier inspection and maintenance; the inspection hole 7 is equipped with a flange seal. The sides of the silencing chamber 4 also have diagonal reinforcing ribs 41 to improve the overall structural stability of the device housing.

[0022] Filter chamber 1 is used to purify the black smoke gas produced during the test run of marine diesel engines. Multiple metal filter elements 2 are distributed within filter chamber 1, with the axial direction of the filter elements 2 being vertical. The metal filter elements 2 are commercially available side-intake and top-outtake type. An air outlet 6 is located at the top of filter chamber 1 for discharging the purified gas. The metal filter elements 2 are made of 316L stainless steel with a temperature resistance of 500℃, and have a filtration accuracy of 0.1μm to 10μm. The metal filter elements 2 are characterized by simple installation and high filtration efficiency.

[0023] A perforated plate 11 is provided at the lower end of the filter chamber 1. The perforated plate 11 is a flat plate structure with several holes of 20 mm in diameter evenly arranged on it, with a perforation rate of 50%. The perforated plate 11 allows some airflow to flow to the surrounding area through the holes, reducing the difference in airflow velocity on the cross section, making the velocity more uniform, and reducing airflow noise.

[0024] A pulse jet cleaning system 3 is installed on the top of the device housing and is connected to the filter chamber 1. The pulse jet cleaning system 3 includes a pulse controller (not shown in the figure), electromagnetic pulse valves 32, a jet pipe assembly, and an air reservoir 33. The jet pipe assembly has multiple jet pipes 31, with the inlets of each pipe corresponding to the upper ends of multiple metal filter elements 2. This ensures that the backflushing airflow from the inlets smoothly enters the filter element from the outlet and exits from the inlet, thus achieving backflushing cleaning of the metal filter element. The jet pipes 31 are connected to the air reservoir 33, which stores compressed air for providing the cleaning. Multiple electromagnetic pulse valves 32 are installed on the multiple jet pipes 31 and are electrically connected to the pulse controller, receiving electrical signals from the pulse controller. Operators can set the corresponding differential pressure value or control the shutdown of the jet cleaning system according to the filter element cleaning requirements via the pulse controller. The device in this embodiment uses a pulse jet blowing system 3 to back-blow the filter element, which can clean the dust on the filter material in a timely manner, avoid clogging, and ensure the normal test run of the marine diesel engine.

[0025] The outer side of the device casing is also equipped with a ladder guardrail 8, which makes the device maintenance work more convenient and safer.

[0026] The above embodiments are merely preferred embodiments of this utility model and are not intended to limit the scope of protection of this utility model. Various modifications and variations can be made to this utility model by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model are included within the scope of protection of this utility model.

Claims

1. A device for treating black smoke during marine diesel engine testing, characterized in that: The device includes a housing, which comprises a lower anechoic chamber and an upper filter chamber, the filter chamber being in communication with the anechoic chamber. An air inlet is provided on one side of the anechoic chamber; The filter chamber contains multiple metal filter elements arranged vertically along their axial direction. Air enters through the sides of the metal filter elements and exits through the top. An air outlet is located at the top of the filter chamber. A pulse jet system is provided above the housing of the device, and the pulse jet system is connected to the filter chamber.

2. The marine diesel engine test smoke treatment device as described in claim 1, characterized in that: in, The metal filter element is a 316L stainless steel metal filter element that is resistant to temperatures up to 500℃, and the filtration accuracy of the metal filter element is 0.1μm to 10μm.

3. The marine diesel engine test smoke treatment device as described in claim 1, characterized in that: in, A perforated plate is provided at the lower end of the filter chamber.

4. The marine diesel engine test smoke treatment device as described in claim 1, characterized in that: in, The pulse jet system includes: a pulse controller, a solenoid pulse valve, a jet pipe assembly, and an air tank. The blowpipe assembly is equipped with multiple blowpipes, and the nozzles of the multiple blowpipes correspond to the upper ends of the multiple metal filter elements. Multiple electromagnetic pulse valves are respectively installed on multiple of the jet pipes, and the electromagnetic pulse valves are electrically connected to the pulse controller. The blowpipe is connected to the air bag.

5. The marine diesel engine test smoke treatment device as described in claim 1, characterized in that: in, The outer side of the device housing is equipped with a ladder guardrail.

6. The marine diesel engine test smoke treatment device as described in claim 1, characterized in that: in, An inspection hole is provided on the other side of the silencing chamber, and the inspection hole is sealed with a flange.

7. The marine diesel engine test run black smoke treatment device as described in claim 1, characterized in that: in, The sides of the anechoic chamber are provided with diagonal reinforcing ribs.

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