A tail gas treatment device for a diesel generator

Abstract

This invention relates to the field of diesel generator exhaust gas treatment technology, specifically to an exhaust gas treatment device for diesel generators. The device includes a frame, on which a diesel generator body and an exhaust gas treatment frame connected to the exhaust pipe of the diesel generator body are mounted. The exhaust gas treatment frame has a partition plate dividing it into two independent chambers: a cooling and dust removal chamber and an exhaust gas purification chamber. The exhaust pipe is connected to the cooling and dust removal chamber of the exhaust gas treatment frame. A cooling water tank is located at the top of the exhaust gas treatment frame, and nozzles are evenly spaced at the top. The partition plate forces the exhaust gas entering the exhaust gas treatment frame downwards and through a filter screen. Simultaneously, coolant is evenly sprayed through the nozzles, thereby achieving forced convection contact between the exhaust gas and the sprayed liquid, increasing the gas-liquid contact area and contact time, and improving the cooling efficiency and dust collection capacity of the exhaust gas.

Description

Technical Field

[0001] This invention relates to the field of diesel generator exhaust gas treatment technology, and more specifically to an exhaust gas treatment device for diesel generators. Background Technology

[0002] Diesel generators, as a common backup and mobile power source, are widely used in industrial production, construction, communications, medical care, data centers, and emergency response. However, during operation, the exhaust gases produced by diesel generators contain a large number of harmful substances, such as particulate matter (PM), nitrogen oxides (NOx), hydrocarbons (HC), and carbon monoxide (CO). If emitted directly without treatment, these substances will seriously affect ambient air quality and endanger human health.

[0003] Currently, diesel generator exhaust gas treatment technologies are mainly divided into two categories: dry purification and wet purification. Dry purification often uses particulate filters or catalytic converters, but it has poor adaptability to high-temperature exhaust gases and is prone to blockage due to particulate matter accumulation, affecting the normal operation of the generator. Wet purification achieves cooling and dust removal through spraying and other methods, but in practical applications, the following problems still exist: First, the exhaust gas does not come into sufficient contact with the spraying liquid, resulting in poor cooling and dust removal effects; second, high-temperature exhaust gas directly enters the purification filter element, which can easily cause thermal damage to the filter element or accelerate aging, affecting purification efficiency and service life; third, the cooling water recycling rate is low, resulting in water waste.

[0004] Therefore, there is an urgent need to design a diesel generator exhaust gas treatment device with good cooling and dust removal effects and effective protection of the purification filter element, so as to overcome the above-mentioned defects. Summary of the Invention

[0005] The technical solution of the present invention is as follows: a diesel generator exhaust gas treatment device, comprising a frame, on which a diesel generator body and an exhaust gas treatment frame connected to the exhaust pipe of the diesel generator body are mounted. The exhaust gas treatment frame has a partition plate that divides it into two independent chambers, namely a cooling and dust removal chamber and an exhaust gas purification chamber. The exhaust pipe is connected to the cooling and dust removal chamber of the exhaust gas treatment frame. A cooling water tank is provided at the top of the exhaust gas treatment frame. Spray nozzles are evenly spaced at the top of the exhaust gas treatment frame. The spray nozzles are located in the cooling and dust removal chamber and are connected to the cooling water tank through a water supply pipe. A cooling and dust removal frame and a connecting frame are arranged side by side at the bottom of the exhaust gas treatment frame. The cooling and dust removal frame is connected to the cooling and dust removal chamber of the exhaust gas treatment frame and is located directly below the cooling and dust removal chamber. The connecting frame is located between the cooling and dust removal frame and the exhaust gas purification chamber of the exhaust gas treatment frame and is connected to both. A filter screen is detachably installed in the cooling and dust removal frame and is located directly below the spray nozzles. When the diesel generator is working, the exhaust gas produced enters the cooling and dust removal chamber of the exhaust gas treatment frame through the exhaust pipe. Under the obstruction of the partition plate, the exhaust gas enters the cooling and dust removal frame downward and passes through the filter screen from top to bottom. After being filtered by the filter screen, the exhaust gas enters the purification chamber of the exhaust gas treatment frame through the connecting frame for purification. At the same time as the exhaust gas passes downward through the filter screen, the liquid in the cooling water tank is transported to the nozzle through the water supply pipe and sprayed downward through the nozzle. The sprayed liquid combines with the exhaust gas to force-cool the exhaust gas.

[0006] In one embodiment, a cooling pipe is fitted onto the exhaust pipe, and a circulating coolant is installed inside the cooling pipe. The exhaust pipe is cooled through the cooling pipe to achieve preliminary cooling of the exhaust gas inside the exhaust pipe.

[0007] In one embodiment, the end of the exhaust pipe that connects to the exhaust gas treatment frame has a flat structure.

[0008] In one embodiment, a smoke guide plate is provided on the top inner side of the exhaust gas treatment frame. The smoke guide plate is located near the connection between the exhaust pipe and the exhaust gas treatment frame. The smoke guide plate is used to guide the exhaust gas entering the exhaust gas treatment frame so that it diffuses in a flat manner, thereby increasing the contact area between the exhaust gas and the spray liquid.

[0009] In one embodiment, a baffle is provided on the inner wall of the cooling and dust removal frame near the connecting frame. The baffle is fixedly installed above the connection between the cooling and dust removal frame and the connecting frame. The baffle is used to prevent cooling water falling from top to bottom from entering the connecting frame through the connection between the cooling and dust removal frame and the connecting frame.

[0010] In one embodiment, a liquid level sensor is installed inside the cooling and dust removal frame, and a water pump is installed at the bottom of the cooling and dust removal frame. A return pipe connects the water pump's discharge end to the cooling water tank.

[0011] In one embodiment, an exhaust fan is installed inside the connecting frame.

[0012] In one embodiment, a sliding frame is slidably disposed in the exhaust gas purification chamber of the exhaust gas treatment frame, and a limit frame is evenly disposed along the axial direction of the sliding frame, and a flue gas purification filter element is detachably disposed between two adjacent limit frames.

[0013] In one embodiment, a sealing strip is provided between the limiting frame and the inner wall of the exhaust gas treatment frame.

[0014] In one embodiment, the side wall of the cooling and dust removal frame is hinged with an access door for easy access to the filter screen.

[0015] In one embodiment, a cooler is installed on the cooling dust removal frame, which is used to cool and reduce the temperature of the cooling liquid inside the cooling dust removal frame.

[0016] The beneficial effects are: 1. Through the blocking effect of the partition plate, the exhaust gas entering the exhaust gas treatment frame is forced downward and passes through the filter screen; at the same time, the coolant is sprayed evenly through the nozzle, thereby realizing forced convection contact between the exhaust gas and the sprayed liquid, increasing the gas-liquid contact area and contact time, and improving the cooling efficiency of the exhaust gas and the dust collection capacity.

[0017] 2. The flat structure at the end of the exhaust pipe, combined with the smoke guide plate, allows the exhaust gas entering the exhaust gas treatment frame to diffuse in a flat shape, avoiding concentrated airflow impacting a certain area, ensuring uniform mixing of exhaust gas and spray liquid, and improving the overall treatment effect.

[0018] 3. Before entering the exhaust gas purification chamber, the exhaust gas undergoes cooling and dust removal treatment to reduce the exhaust gas temperature and particulate matter content, preventing high-temperature flue gas from directly impacting the flue gas purification filter element, reducing the heat load and clogging risk of the filter element, thereby extending the service life of the purification filter element and reducing maintenance costs.

[0019] 4. By setting up a liquid level sensor, water pump and return pipe, the coolant can be recycled, saving water resources; at the same time, the baffle set in the cooling and dust removal frame can effectively prevent the cooling water from flowing back into the connecting frame, ensuring the stable operation of the equipment. Attached Figure Description

[0020] Figure 1 This is a three-dimensional structural diagram of the present invention.

[0021] Figure 2 This is a partial three-dimensional structural diagram of the present invention.

[0022] Figure 3 This is a three-dimensional structural diagram of the exhaust pipe and cooling pipe of the present invention.

[0023] Figure 4This is a three-dimensional structural diagram of the components of the present invention, including the cooling water tank, exhaust gas treatment frame, and cooling and dust removal frame.

[0024] Figure 5 For the present invention Figure 4 A three-dimensional structural diagram of the exhaust gas treatment frame and the cooling and dust removal frame in cross-section.

[0025] Figure 6 This is a perspective sectional view of the exhaust gas treatment frame and the cooling and dust removal frame of the present invention.

[0026] Figure 7 This is a three-dimensional structural diagram of the sliding frame, limiting frame, and flue gas purification filter element of the present invention.

[0027] Figure 8 For the present invention Figure 2 A schematic diagram of the three-dimensional structure from a second perspective.

[0028] The markings in the diagram are as follows: 1-Frame, 100-Diesel generator body, 2-Exhaust pipe, 3-Cooling pipe, 4-Cooling water tank, 5-Exhaust gas treatment frame, 51-Divider plate, 6-Cooling and dust removal frame, 61-Inspection door, 62-Refrigerator, 7-Water supply pipe, 8-Nozzle, 9-Smoke guide plate, 10-Filter screen, 11-Baffle, 12-Liquid level sensor, 13-Water pump, 14-Return pipe, 15-Connecting frame, 16-Exhaust fan, 17-Sliding frame, 18-Limit frame, 19-Flue gas purification filter element, 20-Sealing strip. Detailed Implementation

[0029] The present invention will be further described below with reference to the embodiments shown in the accompanying drawings.

[0030] Example: A diesel generator exhaust gas treatment device, such as... Figure 1 , Figure 2 , Figure 4 and Figure 5 As shown, the device includes a frame 1, on which a diesel generator body 100 and an exhaust gas treatment frame 5 connected to the exhaust pipe 2 of the diesel generator body 100 are mounted. The exhaust gas treatment frame 5 has a partition plate 51 inside, which divides it into two independent chambers: a cooling and dust removal chamber on the left and an exhaust gas purification chamber on the right (e.g., a cooling and dust removal chamber on the left and an exhaust gas purification chamber on the right). Figure 5As shown in the figure, the exhaust pipe 2 is connected to the left cooling and dust removal chamber of the exhaust gas treatment frame 5. A cooling water tank 4 is provided on the top of the exhaust gas treatment frame 5. Spray nozzles 8 are evenly spaced on the top of the exhaust gas treatment frame 5. The spray nozzles 8 are located in the cooling and dust removal chamber and are connected to the cooling water tank 4 through a water supply pipe 7. A cooling and dust removal frame 6 and a connecting frame 15 are arranged side by side at the bottom of the exhaust gas treatment frame 5. The cooling and dust removal frame 6 is connected to the cooling and dust removal chamber of the exhaust gas treatment frame 5 and is located directly below the cooling and dust removal chamber. The connecting frame 15 is located between the cooling and dust removal frame 6 and the exhaust gas purification chamber of the exhaust gas treatment frame 5 and is connected to both. A filter screen 10 is detachably installed in the cooling and dust removal frame 6 and is located directly below the spray nozzles 8. When the diesel generator is working, the exhaust gas produced enters the cooling and dust removal chamber of the exhaust gas treatment frame 5 through the exhaust pipe 2. Under the obstruction of the partition plate 51, the exhaust gas entering the exhaust gas treatment frame 5 flows downward into the cooling and dust removal frame 6, and passes through the filter screen 10 from top to bottom. After being filtered by the filter screen 10, the exhaust gas enters the purification chamber of the exhaust gas treatment frame 5 through the connecting frame 15 for purification. At the same time as the exhaust gas flows downward through the filter screen 10, the liquid in the cooling water tank 4 is transported to the nozzle 8 through the water supply pipe 7, and diffused downward through the nozzle 8. The sprayed liquid combines with the exhaust gas to force cooling of the exhaust gas.

[0031] It is worth noting that, in this embodiment, the end of the exhaust pipe 2 that connects to the exhaust gas treatment frame 5 has a flat structure (e.g., Figure 2 and Figure 3 As shown), a smoke guide plate 9 is provided on the top inner side of the exhaust gas treatment frame 5 (e.g., Figure 5 As shown in the figure, the smoke guide plate 9 is located near the connection between the exhaust pipe 2 and the exhaust gas treatment frame 5. The gas discharged from the exhaust pipe 2, through its flat structure at the end and in conjunction with the smoke guide plate 9, makes the exhaust gas entering the exhaust gas treatment frame 5 appear in a flat and diffused state, avoiding the airflow from concentrating and impacting a certain area, ensuring the uniform mixing of exhaust gas and spray liquid, and improving the overall treatment effect.

[0032] like Figure 2 As shown, a cooling pipe 3 is sleeved on the exhaust pipe 2. The cooling pipe 3 is filled with circulating coolant. The exhaust pipe 2 is cooled by the cooling pipe 3 to achieve initial cooling of the exhaust gas in the exhaust pipe 2; at the same time, it prevents the exhaust pipe 2 from overheating.

[0033] like Figure 6 As shown, to further enhance the cooling effect of the exhaust gas within the cooling dust removal frame 6, a cooler 62 is installed on the cooling dust removal frame 6. The cooler 62 is used to cool and reduce the temperature of the cooling liquid within the cooling dust removal frame 6.

[0034] like Figure 6 As shown, in order to allow the cooled and dust-removed gas to be quickly sent to the lower part of the cooling and dust removal frame 6 into the connecting frame 15, and then transported through the connecting frame 15 to the exhaust gas purification chamber on the right side of the exhaust gas treatment frame 5 above it, an exhaust fan 16 is installed in the connecting frame 15, thereby creating a negative pressure in the connecting frame 15. This allows the gas in the cooling and dust removal frame 6 to quickly enter the connecting frame 15 and be transported through the connecting frame 15 to the exhaust gas purification chamber on the right side of the exhaust gas treatment frame 5 for purification.

[0035] like Figure 5 As shown, to prevent the spray liquid in the cooling and dust removal frame 6 from entering the connecting frame 15 through the communication port between the cooling and dust removal frame 6 and the connecting frame 15, a baffle 11 is provided on the inner wall of the cooling and dust removal frame 6 near the connecting frame 15. The baffle 11 is fixedly installed above the communication port between the cooling and dust removal frame 6 and the connecting frame 15. The baffle 11 can block the spray liquid falling from top to bottom from entering the connecting frame 15 with the gas.

[0036] The exhaust gas generated by the diesel generator body 100 during operation first enters the cooling and dust removal chamber of the exhaust gas treatment frame 5 through the exhaust pipe 2. Due to the obstruction of the partition plate 51, the exhaust gas cannot flow horizontally directly, but is forced downward into the cooling and dust removal frame 6, which is connected to the cooling and dust removal chamber. As the exhaust gas passes through the filter screen 10 from top to bottom, the filter screen 10 can filter out particulate matter in the exhaust gas; at the same time, the cooling liquid in the cooling water tank 4 is evenly transported to each of the nozzles 8 through the water supply pipe 7. The nozzles 8 spray atomized liquid downward, and the sprayed liquid comes into full contact with and mixes with the downward flowing exhaust gas, thereby forcibly cooling the exhaust gas; at the same time, the liquid can also capture dust in the exhaust gas, realizing the initial dust removal of the exhaust gas.

[0037] like Figure 4 and Figure 6 As shown, a liquid level sensor 12 is installed inside the cooling and dust removal frame 6, and a water pump 13 is installed at the bottom of the cooling and dust removal frame 6. A return pipe 14 is connected between the discharge end of the water pump 13 and the cooling water tank 4. The liquid level sensor 12 monitors the liquid level in the cooling and dust removal frame 6 in real time. When the liquid level reaches the set value, the water pump 13 starts and transports the cooling liquid collected at the bottom back to the cooling water tank 4 through the return pipe 14 to realize the recycling of the cooling liquid and reduce water waste.

[0038] like Figure 6 and Figure 7As shown, a sliding frame 17 is slidably disposed in the exhaust gas purification chamber of the exhaust gas treatment frame 5. Limiting frames 18 are evenly spaced along the axial direction of the sliding frame 17. A flue gas purification filter element 19 is detachably disposed between two adjacent limiting frames 18. The flue gas purification filter element 19 has an inner, middle and outer three-layer structure. Its outer layer is a high-temperature resistant fiber layer, which is used to intercept larger particles and provide support and protection. The middle layer is an activated carbon adsorption layer, which is used to adsorb hydrocarbons (HC), odors and some gaseous pollutants in the exhaust gas. The outer layer is a catalyst coating, which contains precious metals such as platinum, palladium and rhodium, and is used to catalyze the oxidation of carbon monoxide (CO) and residual hydrocarbons (HC), thereby achieving purification and filtration of the exhaust gas.

[0039] like Figure 8 As shown, a sealing strip 20 is provided between the limiting frame 18 and the inner wall of the exhaust gas treatment frame 5 to ensure that all exhaust gas passes through the flue gas purification filter element 19 and prevent leakage.

[0040] The suction generated by the exhaust fan 16 during operation, after cooling and dust removal, draws the exhaust gas into the connecting frame 15, and then into the exhaust gas purification chamber of the exhaust gas treatment frame 5. Inside the purification chamber, the exhaust gas passes sequentially through multiple flue gas purification filters 19 to further remove harmful substances, completing the final purification; then, it is discharged from the exhaust end of the exhaust gas treatment frame 5.

[0041] like Figure 8 As shown, the side wall of the cooling and dust removal frame 6 is hinged with an inspection door 61 for easy access to the filter screen 10, thereby facilitating the maintenance and replacement of the filter screen 10.

[0042] The above description is merely an embodiment of the present invention and is not intended to limit the present invention. All equivalent substitutions made within the principles of the present invention should be included within the scope of protection of the present invention. Contents not described in detail in this invention are existing technologies known to those skilled in the art.

Claims

1. A diesel generator exhaust gas treatment device, characterized in that: The system includes a frame (1), on which a diesel generator body (100) and an exhaust gas treatment frame (5) connected to the exhaust pipe (2) of the diesel generator body (100) are mounted. The exhaust gas treatment frame (5) has a partition plate (51) inside and is divided into two independent chambers by the partition plate (51), namely a cooling and dust removal chamber and an exhaust gas purification chamber. The exhaust pipe (2) is connected to the cooling and dust removal chamber of the exhaust gas treatment frame (5). A cooling water tank (4) is provided on the top of the exhaust gas treatment frame (5). Spray nozzles (8) are evenly spaced on the top of the exhaust gas treatment frame (5). (8) A cooling and dust removal frame (6) and a connecting frame (15) are arranged side by side at the bottom of the exhaust gas treatment frame (5). The cooling and dust removal frame (6) is connected to the cooling and dust removal chamber of the exhaust gas treatment frame (5) and is located directly below the cooling and dust removal chamber. The connecting frame (15) is located between the cooling and dust removal frame (6) and the exhaust gas purification chamber of the exhaust gas treatment frame (5) and is connected to both of them. A filter screen (10) is detachably installed inside the cooling and dust removal frame (6) and is located directly below the nozzle (8).

2. The exhaust gas treatment device for a diesel generator as described in claim 1, characterized in that: A cooling pipe (3) is fitted onto the exhaust pipe (2).

3. The exhaust gas treatment device for a diesel generator as described in claim 1, characterized in that: The end of the exhaust pipe (2) that connects to the exhaust gas treatment frame (5) is a flat structure. A smoke guide plate (9) is provided on the top of the inner side of the exhaust gas treatment frame (5). The smoke guide plate (9) is close to the connection between the exhaust pipe (2) and the exhaust gas treatment frame (5). The smoke guide plate (9) is used to guide the exhaust gas entering the exhaust gas treatment frame (5) so that it is flat and diffused, thereby increasing the contact area between the exhaust gas and the spray liquid.

4. The exhaust gas treatment device for a diesel generator as described in claim 1, characterized in that: A baffle (11) is provided on the inner wall of the cooling and dust removal frame (6) near the connecting frame (15).

5. The exhaust gas treatment device for a diesel generator as described in claim 1, characterized in that: A liquid level sensor (12) is installed inside the cooling and dust removal frame (6), and a water pump (13) is installed at the bottom of the cooling and dust removal frame (6). A return pipe (14) is connected between the discharge end of the water pump (13) and the cooling water tank (4).

6. The exhaust gas treatment device for a diesel generator as described in claim 1, characterized in that: An exhaust fan (16) is installed inside the connecting frame (15).

7. The exhaust gas treatment device for a diesel generator as described in claim 1, characterized in that: A sliding frame (17) is slidably provided in the exhaust gas purification chamber of the exhaust gas treatment frame (5). The sliding frame (17) is evenly provided with limit frames (18) along its axial direction. A flue gas purification filter element (19) is detachably provided between two adjacent limit frames (18).

8. The exhaust gas treatment device for a diesel generator as described in claim 7, characterized in that: A sealing strip (20) is provided between the limit frame (18) and the inner wall of the exhaust gas treatment frame (5).

9. The exhaust gas treatment device for a diesel generator as described in claim 1, characterized in that: The side wall of the cooling and dust removal frame (6) is hinged with an inspection door (61) for easy access to the filter screen (10).

10. The exhaust gas treatment device for a diesel generator as described in claim 1, characterized in that: A cooler (62) is installed on the cooling and dust removal frame (6). The cooler (62) is used to cool and reduce the temperature of the cooling liquid in the cooling and dust removal frame (6).

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