Smoke-reducing, temperature-reducing and noise-reducing treatment system for tail gas of diesel generator

Abstract

The utility model discloses a smoke-reducing, temperature-reducing and noise-reducing treatment system for tail gas of a diesel generator, which relates to the technical field of tail gas treatment of diesel generators and comprises a gas inlet pipe and a first smoke exhaust pipe which are connected onto a diesel generator set. A second smoke exhaust pipe, a first gas-liquid separator and a second catcher are arranged on the cooling treatment box, the smoke exhaust end of the second catcher is connected with a third smoke exhaust pipe, and a smoke cooling mechanism is arranged on the third smoke exhaust pipe. In addition, secondary treatment is conducted through the second catcher, meanwhile, flue gas with the emission temperature not reaching the standard can be cooled again through the flue gas cooling mechanism, it is guaranteed that the flue gas is discharged after reaching the normal temperature, pollution to the environment is avoided, and the environment protection effect is achieved. And the environmental protection property of tail gas emission of the diesel generator is improved.

Description

Technical Field

[0001] This utility model relates to the field of diesel generator exhaust gas treatment technology, and in particular to a system for reducing smoke, temperature and noise in diesel generator exhaust gas. Background Technology

[0002] Diesel generator exhaust refers to the waste gas produced by diesel engines during the combustion of diesel fuel. This exhaust typically contains various harmful substances, such as nitrogen oxides (NOx), carbon dioxide (CO2), hydrocarbons (HC), particulate matter (PM), and carbon monoxide (CO), which have a significant impact on air quality and the environment. To reduce the environmental pollution caused by diesel generator exhaust, certain emission control technologies must be adopted.

[0003] Secondly, the excessively high exhaust gas temperature emitted by diesel generators not only affects the operation of the engine set but also impacts the environment. Therefore, the existing conventional practice is to cool down the exhaust gas emitted by the engine. However, the existing cooling systems are all based on a single spray method. While this method is effective in cooling the exhaust gas, it is clearly insufficient in capturing and treating harmful substances in the exhaust gas, which can easily lead to high levels of environmental pollution from the emitted exhaust gas. Therefore, this utility model provides a system for reducing smoke, temperature, and noise from diesel generator exhaust gas. Utility Model Content

[0004] To address the shortcomings of existing technologies, this utility model provides a system for reducing smoke, temperature, and noise in diesel generator exhaust, thus solving the problems mentioned in the background section.

[0005] To achieve the above objectives, this utility model is implemented through the following technical solution: a system for reducing smoke, temperature and noise in diesel generator exhaust gas, including an intake pipe and a first exhaust pipe connected to the diesel generator set, the other end of the first exhaust pipe being connected to a cooling treatment box, and a trap being provided between the first exhaust pipe and the cooling treatment box.

[0006] The cooling treatment box is also equipped with a second exhaust pipe, on which a gas-liquid separator is installed. The cooling treatment box is connected to a second trap through the second exhaust pipe, and the exhaust end of the trap is connected to a third exhaust pipe.

[0007] The cooling treatment box has a partition plate installed at the bottom of the interior, and top partition plates are symmetrically installed on both sides of the partition plate at the top of the interior. An "S"-shaped flue gas flow channel is formed between the top of the two top partition plates, the top of the partition plate, and the inner wall of the cooling treatment box. The cooling treatment box is also equipped with a cooling system for spraying and cooling the flue gas.

[0008] The third exhaust pipe is also equipped with a flue gas cooling mechanism to cool the exhaust gas.

[0009] As a further technical solution of this utility model, the first exhaust pipe is wrapped with sound-absorbing cotton, and a check valve is also provided on the first exhaust pipe between the first catcher and the cooling treatment box. The end of the first exhaust pipe extending into the cooling treatment box is located above one end of the flue gas flow channel.

[0010] As a further technical solution of this utility model, the interior of the cooling treatment box is filled with industrial soda water, and the interior of the cooling treatment box is also evenly distributed with cooling water pipes. One end of the cooling water pipes is arranged in a matrix around the interior of the cooling treatment box and is submerged in industrial soda water. The end of the cooling water pipes near the water inlet is designed in an S-shape and is located above the industrial soda water inside the cooling treatment box.

[0011] An inlet valve is provided near the inlet end of the cooling water pipe, and a cooling water delivery pump is provided at the inlet end of the cooling water pipe. The outlet end of the cooling water pipe is connected to a return water pipe extending to the outside of the cooling treatment box.

[0012] As a further technical solution of this utility model, the outside of the cooling treatment box is also wrapped with sound-absorbing and heat-insulating cotton, and a control panel is provided at the top of the cooling treatment box. A water temperature sensor and a liquid level sensor for monitoring the industrial soda water inside the cooling treatment box are also installed on the cooling treatment box.

[0013] The cooling treatment box has a vent pipe extending to its inner bottom at one side, and a drain valve is provided on the vent pipe.

[0014] As a further technical solution of this utility model, the cooling system includes a circulating water pump installed at the top of the cooling treatment box. The pumping end of the circulating water pump is connected to a pipe that extends to the bottom of the cooling treatment box. The outlet end of the circulating water pump is connected to a spray cooling pipe. The other end of the spray cooling pipe extends to the top of the cooling treatment box and is located in the flue gas flow channel. Multiple spray nozzles are evenly distributed on a section of the spray cooling pipe located in the flue gas flow channel.

[0015] As a further technical solution of this utility model, the flue gas cooling mechanism includes an air mixer connected to one end of a third exhaust pipe, and an air inlet pipe is also connected to the air mixer, and a check valve is provided on the air inlet pipe.

[0016] The air mixer is connected to a second gas-liquid separator at its outlet. The exhaust end of the second gas-liquid separator is connected to a fourth exhaust pipe. A temperature sensor is installed on the fourth exhaust pipe, and a fan is connected to the other end of the fourth exhaust pipe.

[0017] As a further technical solution of this utility model, both the first and second traps are DPF+DOC particle traps.

[0018] This utility model provides a system for reducing smoke, temperature, and noise in diesel generator exhaust, which has the following advantages compared with the prior art:

[0019] 1. This design is for a diesel generator exhaust gas smoke reduction, cooling and noise reduction treatment system. A filter and a cooling treatment box are added to one end of the diesel generator exhaust pipe to facilitate the preliminary treatment and cooling of the exhaust gas, so that the high temperature exhaust gas can be cooled to meet the emission standards. At the same time, it can also effectively capture exhaust gas particulate matter and reduce gas pollution. In addition, after the exhaust gas has been cooled, it is further treated by gas-liquid separation and then treated by filter two to improve the exhaust gas emission efficiency.

[0020] 2. This design provides a system for reducing smoke, temperature and noise in diesel generator exhaust. A flue gas cooling mechanism is added to the third exhaust pipe to further cool the exhaust gas that has not reached the standard temperature and perform water vapor separation. This ensures that the exhaust gas reaches the normal temperature before being discharged, thus avoiding environmental pollution and improving the environmental friendliness of diesel generator exhaust emissions. Attached Figure Description

[0021] Figure 1 This is a structural schematic diagram of a system for reducing smoke, temperature, and noise in the exhaust gas of a diesel generator.

[0022] In the diagram: 1. Diesel generator set; 2. Intake pipe; 3. First exhaust pipe; 4. Filter 1; 41. Check valve 1; 5. Cooling treatment box; 50. Top partition; 51. Control panel; 52. Cooling water pipe; 53. Cooling water delivery pump; 54. Inlet valve; 55. Return pipe; 56. Water temperature sensor; 57. Liquid level sensor; 58. Sound-absorbing and heat-insulating cotton; 59. Vent pipe; 510. Partition plate; 6. Spray cooling pipe; 61. Circulating water pump; 7. Second exhaust pipe; 71. Gas-liquid separator 1; 8. Filter 2;

[0023] 9. Third exhaust pipe; 91. Air mixer; 92. Gas-liquid separator II; 93. Fourth exhaust pipe; 94. Fan; 95. Temperature sensor; 96. Air inlet pipe; 97. Check valve II. Detailed Implementation

[0024] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present utility model without creative effort are within the protection scope of the present utility model.

[0025] Please see Figure 1 As shown, this utility model provides a technical solution for a diesel generator exhaust gas smoke reduction, temperature reduction, and noise reduction treatment system: A diesel generator exhaust gas smoke reduction, temperature reduction, and noise reduction treatment system includes an intake pipe 2 and a first exhaust pipe 3 connected to a diesel generator set 1. The other end of the first exhaust pipe 3 is connected to a cooling treatment box 5, and a trap 4 is provided between the first exhaust pipe 3 and the cooling treatment box 5. The outside of the first exhaust pipe 3 is wrapped with sound-absorbing cotton. The sound-absorbing cotton on the first exhaust pipe 3 can absorb and reduce the noise generated during the flow of exhaust gas, thereby reducing the noise impact.

[0026] A check valve 41 is installed on the first exhaust pipe 3 between the trap 4 and the cooling treatment box 5. Both the check valve 41 and the check valve 97 are flue gas check valves. A partition plate 510 is installed at the bottom of the interior of the cooling treatment box 5, and top partition plates 50 are symmetrically installed on both sides of the partition plate 510 at the top of the interior of the cooling treatment box 5. An "S"-shaped flue gas flow channel is formed between the top of the two top partition plates 50, the top of the partition plate 510, and the inner wall of the cooling treatment box 5 (as indicated by the arrows ①-②-③-④ in the figure). One end of the first exhaust pipe 3 extends into the cooling treatment box 5 and is located above one end of the flue gas flow channel, so that the flue gas discharged into the cooling treatment box 5 by the first exhaust pipe 3 can enter from one end of the flue gas flow channel and flow to the other end. During this process, the cooling system can be used to spray and cool the flue gas.

[0027] The cooling treatment box 5 is also equipped with a second exhaust pipe 7, on which a gas-liquid separator 71 is installed. The gas-liquid separator can separate the gas and liquid in the exhaust gas after spray cooling, so that the separated exhaust gas can be discharged into the second trap 8. The cooling treatment box 5 is connected to the second trap 8 through the second exhaust pipe 7. Both the first trap 4 and the second trap 8 adopt DPF+DOC particulate traps, that is, a combination of diesel particulate filter and diesel oxidation catalyst. The two are connected by a pipeline. When the exhaust gas passes through the diesel particulate filter, it captures and removes solid particulate matter in the exhaust gas. Then the exhaust gas continues to flow into the diesel oxidation catalyst, which reacts with oxygen in the exhaust gas to reduce pollutants in the exhaust gas. The combination of the two can effectively capture exhaust particulate matter and reduce gas pollution. Both the first trap 4 and the second trap 8 adopt ceramic structure.

[0028] The exhaust end of the second capture device 8 is connected to a third exhaust pipe 9. The third exhaust pipe 9 is also equipped with a flue gas cooling mechanism to cool the exhaust gas. The flue gas cooling mechanism includes an air mixer 91 connected to one end of the third exhaust pipe 9. An air inlet pipe 96 is also connected to the air mixer 91. A check valve 97 is installed on the air inlet pipe 96. The exhaust end of the air mixer 91 is connected to a gas-liquid separator 92. The exhaust end of the gas-liquid separator 92 is connected to a fourth exhaust pipe 93. A temperature sensor 95 is installed on the fourth exhaust pipe 93. The temperature sensor 95 is used to monitor the flue gas temperature in the fourth exhaust pipe 93. The other end of the fourth exhaust pipe 93 is connected to a fan 94. When the temperature sensor 95 detects that the flue gas temperature in the fourth exhaust pipe 93 has not reached the set threshold, it will transmit a signal to the control panel 51 (i.e., the PLC controller) to control the flue gas cooling mechanism to cool the flue gas.

[0029] The cooling treatment box 5 is also equipped with a cooling system for spray cooling of flue gas. The cooling system includes a circulating water pump 61 installed at the top of the cooling treatment box 5. The water pump 61 is connected to a pipe at its pumping end and extends to the bottom of the cooling treatment box 5. The water pump 61 is connected to a spray cooling pipe 6 at its outlet end. The other end of the spray cooling pipe 6 extends to the top of the cooling treatment box 5 and is located in the flue gas flow channel. Multiple spray nozzles are evenly distributed on the section of the spray cooling pipe 6 located in the flue gas flow channel. When the circulating water pump 61 is working, the industrial soda water inside the cooling treatment box 5 can be pumped into the spray cooling pipe 6 and then sprayed out by the multiple spray nozzles at one end. This allows the atomized industrial soda water to come into contact with the flue gas as it passes through the flue gas flow channel, thereby cooling the flue gas and treating some of the harmful particulate matter in the flue gas.

[0030] The cooling treatment box 5 is filled with industrial soda water. Cooling water pipes 52 are also evenly distributed inside the cooling treatment box 5. One section of the cooling water pipes 52 is arranged in a matrix around the inside of the cooling treatment box 5 and is submerged in industrial soda water. The section of the cooling water pipes 52 near the water inlet is designed in an S-shape and is located above the industrial soda water inside the cooling treatment box 5. A water inlet valve 54 is installed on the cooling water pipes 52 near the water inlet, and a cooling water delivery pump 53 is installed at the water inlet of the cooling water pipes 52. The water outlet of the cooling water pipes 52 is connected to a return water pipe 55 extending to the outside of the cooling treatment box 5. Cooling water or coolant is transported in the cooling water pipes 52 to facilitate the cooling and cooling of the industrial soda water. At the same time, the S-section of the cooling water pipes 52 can also exchange heat and cold with the flue gas flowing at the rear end of the flue gas flow channel, further reducing the flue gas temperature.

[0031] The exterior of the cooling treatment box 5 is also wrapped with sound-absorbing and heat-insulating cotton 58. During the cooling and flow treatment of high-temperature exhaust gas inside the cooling treatment box 5, the sound-absorbing and heat-insulating cotton 58 can be used to reduce noise. A control panel 51 is installed at the top of the cooling treatment box 5. A water temperature sensor 56 and a liquid level sensor 57 are also installed on the cooling treatment box 5 to monitor the industrial soda water inside. A vent pipe 59 extending to the bottom of the interior is installed on the lower side of one side of the cooling treatment box 5. A drain valve is installed on the vent pipe 59. The water temperature sensor 56 (i.e., temperature sensor) can monitor the temperature of the industrial soda water inside the cooling treatment tank 5. When the temperature is too high, the cooling water delivery pump 53 can be turned on to deliver the external low-temperature coolant or cooling water into the cooling treatment tank 5. Meanwhile, the high-temperature coolant or cooling water in the cooling water pipe 52 inside the cooling treatment tank 5 is discharged into the cooling treatment tank 5 through the return water pipe 55. In this way, the newly introduced low-temperature coolant or cooling water is used to exchange heat with the industrial soda water to reduce the temperature of the industrial soda water.

[0032] The working principle of this utility model is as follows: When in use, the diesel generator produces high-temperature exhaust gas (i.e., high-temperature flue gas), which passes through the first exhaust pipe 3 and the flow capture device 4. During the flow process, the sound-absorbing cotton on the first exhaust pipe absorbs and reduces the noise generated by it.

[0033] After the high-temperature exhaust gas undergoes preliminary filtration by the capture device 4, it flows to one end of the flue gas flow channel inside the cooling treatment box 5 (i.e., ① in the figure).

[0034] At this time, by controlling the start of the circulating water pump 61, the industrial soda water in the cooling treatment tank 5 is drawn and transported to the spray cooling pipe 6, and then sprayed out by multiple spray nozzles at one end, so that when the exhaust gas passes through the flue gas flow channel, the mist of industrial soda water comes into contact with the flue gas, thereby achieving the cooling treatment of the flue gas, and at the same time treating some of the harmful particulate matter in the flue gas.

[0035] Furthermore, the exhaust gas flows sequentially to points ② and ③ in the flue gas flow channel for continuous cooling and treatment of harmful substances. When the exhaust gas flows to point ④ after being cooled at point ③, it will come into contact with section S of the cooling water pipe 52 to achieve heat exchange, thereby cooling the exhaust gas again and bringing the high-temperature exhaust gas to a near-normal ambient temperature.

[0036] Because the exhaust gas will generate a certain amount of water vapor when it is treated in the cooling treatment box 5, the water vapor will pass through the gas-liquid separator 71 on the second exhaust pipe 7 to separate the water vapor into gas and liquid. The separated dry exhaust gas will then flow to the capture device 8, where the capture device 8 will treat the exhaust gas again to make it reach the qualified air quality. The qualified air will then be discharged through the third exhaust pipe 9 and the fourth exhaust pipe 93.

[0037] When the temperature sensor 95 on the fourth exhaust pipe 93 detects that the temperature of the flue gas in the fourth exhaust pipe 93 has not reached the set threshold, it will transmit a signal to the control panel 51, which will then control the fan 94 to start. Fresh air will then enter the air mixer 91 through the air inlet pipe 96 and mix with the flue gas discharged from the third exhaust pipe 9 in the air mixer 91 to cool it down. After the flue gas reaches the normal temperature, it will flow into the gas-liquid separator 92, where the water vapor generated by the mixing of fresh air and flue gas will be separated. Finally, it will be discharged through the fourth exhaust pipe 93.

[0038] The above description is merely a preferred embodiment of this utility model. It should be noted that those skilled in the art can make various improvements and modifications without departing from the principles of this utility model, and these improvements and modifications should also be considered within the scope of protection of this utility model. Structures, devices, and operating methods not specifically described or explained in this utility model are implemented according to conventional methods in the art, unless otherwise specified or limited.

Claims

1. A system for reducing smoke, temperature, and noise from diesel generator exhaust, comprising an intake pipe (2) and a first exhaust pipe (3) connected to a diesel generator set (1), characterized in that, The other end of the first exhaust pipe (3) is connected to a cooling treatment box (5), and a trap (4) is provided between the first exhaust pipe (3) and the cooling treatment box (5); The cooling treatment box (5) is also provided with a second exhaust pipe (7), and a gas-liquid separator (71) is installed on the second exhaust pipe (7). The cooling treatment box (5) is connected to a second trap (8) through the second exhaust pipe (7). The exhaust end of the trap (8) is connected to a third exhaust pipe (9). The cooling treatment box (5) is equipped with a partition plate (510) at the bottom of its interior, and top partition plates (50) are symmetrically installed on both sides of the partition plate (510) at the top of the interior of the cooling treatment box (5). An "S"-shaped flue gas flow channel is formed between the top of the two top partition plates (50) and the partition plate (510) and the inner wall of the cooling treatment box (5). The cooling treatment box (5) is also equipped with a cooling system for spraying and cooling the flue gas. The third exhaust pipe (9) is also equipped with a flue gas cooling mechanism to cool the exhaust gas.

2. The system for reducing smoke, temperature, and noise from diesel generator exhaust gas according to claim 1, characterized in that, The first exhaust pipe (3) is wrapped with sound-absorbing cotton. A check valve (41) is also installed on the first exhaust pipe (3) between the catcher (4) and the cooling treatment box (5). One end of the first exhaust pipe (3) extends into the cooling treatment box (5) and is located above one end of the flue gas flow channel.

3. The system for reducing smoke, temperature, and noise from diesel generator exhaust gas according to claim 1, characterized in that, The cooling treatment box (5) is filled with industrial soda water. Cooling water pipes (52) are also evenly distributed inside the cooling treatment box (5). One section of the cooling water pipe (52) is arranged in a matrix around the inside of the cooling treatment box (5) and is submerged in industrial soda water. The section of the cooling water pipe (52) near the water inlet is designed in an S-shape and is located above the industrial soda water inside the cooling treatment box (5). A water inlet valve (54) is provided near the water inlet end of the cooling water pipe (52), and a cooling water delivery pump (53) is provided at the water inlet end of the cooling water pipe (52). The water outlet end of the cooling water pipe (52) is connected to a return water pipe (55) extending to the outside of the cooling treatment box (5).

4. The system for reducing smoke, temperature, and noise from diesel generator exhaust gas according to claim 1, characterized in that, The cooling treatment box (5) is also wrapped with sound-absorbing and heat-insulating cotton (58), and a control panel (51) is provided at the top of the cooling treatment box (5). A water temperature sensor (56) and a liquid level sensor (57) are also installed on the cooling treatment box (5) to monitor the industrial soda water inside. The cooling treatment box (5) has a vent pipe (59) extending to the bottom of its interior on one side, and a drain valve is provided on the vent pipe (59).

5. The system for reducing smoke, temperature, and noise from diesel generator exhaust gas according to claim 1, characterized in that, The cooling system includes a circulating water pump (61) installed on the upper end of the cooling treatment box (5). The pump (61) has a pipe connected to its pumping end and extends to the bottom of the cooling treatment box (5). The pump (61) has a spray cooling pipe (6) connected to its outlet end. The other end of the spray cooling pipe (6) extends to the upper part of the cooling treatment box (5) and is located in the flue gas flow channel. Multiple spray nozzles are evenly distributed on a section of the spray cooling pipe (6) located in the flue gas flow channel.

6. The system for reducing smoke, temperature, and noise from diesel generator exhaust gas according to claim 1, characterized in that, The flue gas cooling mechanism includes an air mixer (91) connected to one end of the third exhaust pipe (9), and an air inlet pipe (96) connected to the air mixer (91), and a check valve (97) is provided on the air inlet pipe (96). The air mixer (91) is connected to a second gas-liquid separator (92) at its outlet end. The second gas-liquid separator (92) is connected to a fourth exhaust pipe (93) at its exhaust end. A temperature sensor (95) is installed on the fourth exhaust pipe (93), and a fan (94) is connected to the other end of the fourth exhaust pipe (93).

7. The system for reducing smoke, temperature, and noise from diesel generator exhaust gas according to claim 1, characterized in that, Both the first trap (4) and the second trap (8) are DPF+DOC particle traps.

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