A device for treating exhaust gas of a diesel engine

Abstract

The application provides a diesel engine exhaust treatment device, and relates to the technical field of diesel engine exhaust treatment, which comprises a filtering assembly and a spraying assembly. The filtering assembly comprises an air inlet pipe and a filter, the air inlet pipe is communicated with the filter, the spraying assembly comprises a turbine, a water pump, a spraying part and an aeration part, the air inlet of the turbine is communicated with the filter, the air outlet of the turbine is communicated with the spraying part, the output shaft of the turbine is connected with the shaft of the water pump, the water suction port of the water pump is communicated with the aeration part, the water outlet of the water pump is communicated with the spraying part, and the spraying part is communicated with the aeration part. The application can effectively filter out the components easily soluble in water in the exhaust through the spraying and aeration process, separate the water in the exhaust, reduce the water carried away by the exhaust, and thus reduce the water loss.

Description

Technical Field

[0001] This application relates to the field of diesel engine exhaust gas treatment technology, and more specifically, to a treatment device for diesel engine exhaust gas treatment. Background Technology

[0002] A diesel engine is an engine that burns diesel fuel to obtain energy. Like gasoline engines, diesel engines also emit exhaust gases during operation. These exhaust gases contain a large number of harmful substances and therefore cannot be emitted directly; they need to be treated first. This is where diesel engine exhaust treatment devices come in.

[0003] Existing diesel engine exhaust treatment devices filter diesel exhaust through multi-layer filter screens. This filtration method is ineffective in treating exhaust and cannot effectively utilize the energy of exhaust flow to remove some water-soluble impurities.

[0004] In response, Chinese patent application number CN201821931760.4 discloses a diesel engine exhaust gas treatment device. This solution mainly involves setting up a water storage tank, with a spiral fan blade and a rotating shaft above the water storage tank. When the device is installed on the diesel engine exhaust pipe, the flowing exhaust gas will drive the spiral fan blade to rotate, thereby raising the water in the water storage tank to achieve spray treatment of the exhaust gas, removing impurities from the exhaust gas and achieving a very effective exhaust gas treatment effect. In addition, an S-shaped air guide pipe is set up, and a baffle is set inside the S-shaped air guide pipe to effectively prevent the water in the water storage tank from flowing out in large quantities with the exhaust gas, so as to make full use of clean water.

[0005] However, in the process of implementing the technical solutions in the embodiments of this application, the inventors of this application discovered that the above-mentioned technology has at least the following technical problems:

[0006] Water is lifted up by the fan blades. Due to the rotation of the fan blades, the water is concentrated on the periphery due to centrifugal force, and the area in contact with the exhaust gas is greatly reduced, resulting in poor spraying effect. Summary of the Invention

[0007] To overcome the shortcomings of existing technologies, this application provides a diesel engine exhaust gas treatment device that can solve the problems mentioned in the background art.

[0008] The technical solution adopted by the embodiments of this application to solve its technical problem is: a treatment device for diesel engine exhaust gas, including a filter assembly and a spray assembly.

[0009] The filtration assembly includes an air inlet pipe and a filter element, the air inlet pipe being connected to the filter element. The spray assembly includes a turbine, a water pump, a spray element, and an aerator element. The air inlet of the turbine is connected to the filter element, the air outlet of the turbine is connected to the spray element, the output shaft of the turbine is connected to the shaft of the water pump, the water inlet of the water pump is connected to the aerator element, the water outlet of the water pump is connected to the spray element, and the spray element is connected to the aerator element.

[0010] In one specific implementation, the filter element includes a housing and a filter screen, the air intake pipe is fixedly connected to one end of the housing, the filter screen is inserted into the housing, and the other end of the housing is connected to the air intake of the turbine.

[0011] In one specific implementation, the spraying component includes a spray box and a pipe network, the pipe network is fixedly connected to the inner wall of the spray box, the air outlet of the turbine is connected to the pipe network, and nozzles are evenly arranged on the pipe network.

[0012] In one specific implementation, the aeration element includes an aeration box and an aeration net, the aeration net being fixedly connected to the inner wall of the aeration box and communicating with the spray box.

[0013] In one specific implementation, the aeration element further includes an air outlet pipe, which is fixedly connected to the aeration box.

[0014] In one specific implementation, the filter assembly further includes a pressure relief valve, which is disposed on the air inlet pipe and whose outlet is connected to the aeration net.

[0015] In one specific implementation, the pressure relief valve is equipped with a whistle.

[0016] In one specific implementation, a speed reducer is provided on the output shaft of the turbine, and the water pump and the turbine are connected through the speed reducer shaft.

[0017] The advantages of the embodiments of this application are:

[0018] The spraying and aeration process allows for more effective filtration of water-soluble components in the exhaust gas, and can also separate moisture from the exhaust gas, reducing water loss. Attached Figure Description

[0019] Figure 1 A schematic diagram of the structure of the diesel engine exhaust gas treatment device provided in the embodiments of this application;

[0020] Figure 2 A schematic diagram of the water circuit structure in the diesel engine exhaust gas treatment device provided in the embodiments of this application;

[0021] Figure 3 A schematic diagram of the gas path structure in the diesel engine exhaust gas treatment device provided in the embodiments of this application;

[0022] Figure 4 A schematic diagram of the filter structure provided for an embodiment of this application.

[0023] In the diagram: 100-Filter assembly; 110-Air inlet pipe; 120-Filter element; 121-Box; 122-Filter screen; 130-Pressure relief valve; 200-Spray assembly; 210-Turbine; 220-Water pump; 230-Spray element; 231-Spray box; 232-Pipe network; 240-Aeration element; 241-Aeration box; 242-Aeration net; 243-Air outlet pipe; 250-Reducer. Detailed Implementation

[0024] The technical solution in this application embodiment is to solve the problems mentioned in the background art above, and the overall idea is as follows:

[0025] Please see Figure 1 A treatment device for diesel engine exhaust gas includes a filter assembly 100 and a spray assembly 200.

[0026] The spray assembly 200 utilizes the spraying and aeration process to more effectively filter out water-soluble components in the exhaust gas, and can separate the moisture in the exhaust gas, reducing the amount of moisture carried away by the exhaust gas, thereby reducing water loss.

[0027] Please see Figures 1-4The filter assembly 100 includes an air inlet pipe 110 and a filter element 120. The air inlet pipe 110 is connected to the filter element 120. The spray assembly 200 includes a turbine 210, a water pump 220, a spray element 230, and an aeration element 240. The air inlet of the turbine 210 is connected to the filter element 120, the air outlet of the turbine 210 is connected to the spray element 230, the output shaft of the turbine 210 is connected to the shaft of the water pump 220, the water inlet of the water pump 220 is connected to the aeration element 240, the water outlet of the water pump 220 is connected to the spray element 230, and the spray element 230 is connected to the aeration element 240. Here, diesel engine exhaust gas enters through intake pipe 110, is filtered by filter element 120, passes through turbine 210 and enters spray element 230. The exhaust gas flow drives turbine 210 to rotate, and turbine 210 then drives water pump 220 to operate, drawing water from aeration element 240 to supply spray element 230. After the spray element 230 sprays water curtains and fully contacts the exhaust gas, all the water and exhaust gas flow into aeration element 240. During the aeration process, the fine water particles come into full contact with the water, and the surface tension of the water dissolves the fine water particles in the exhaust gas back into the water, which helps to reduce the moisture content in the exhaust gas. The aerated exhaust gas is then discharged. In summary, the spray assembly 200 uses the spraying and aeration process to more effectively filter out water-soluble components in the exhaust gas and separate the water in the exhaust gas, reducing the amount of water carried away by the exhaust gas and thus reducing water loss.

[0028] Please see Figure 3-4 The filter element 120 includes a housing 121 and a filter screen 122. The intake pipe 110 is fixedly connected to one end of the housing 121, and the filter screen 122 is inserted into the housing 121. The other end of the housing 121 is connected to the intake port of the turbine 210. Here, multiple different types of filter screens 122 are inserted into the housing 121 to filter harmful substances in the exhaust gas. The insertion method also facilitates the replacement of the filter screens 122.

[0029] Please see Figure 2-3 The spray unit 230 includes a spray box 231 and a pipe network 232. The pipe network 232 is fixedly connected to the inner wall of the spray box 231. The air outlet of the turbine 210 is connected to the pipe network 232. Nozzles are evenly arranged on the pipe network 232. Here, the exhaust gas enters the spray box 231 after passing through the turbine 210. The water pump 220 obtains power to pump water from the aeration unit 240 into the pipe network 232. Water curtains are sprayed from multiple nozzles to fully contact the exhaust gas, so that some substances in the exhaust gas can dissolve in water. Then, the water droplets collect at the bottom of the spray box 231 and enter the aeration unit 240 together with the exhaust gas.

[0030] Please see Figure 2-3The aeration unit 240 includes an aeration box 241 and an aeration net 242. The aeration net 242 is fixedly connected to the inner wall of the aeration box 241 and is connected to the spray box 231. Here, the exhaust gas mixed with water droplets is dispersed and aerated from the aeration net 242, making full contact with the water so that the water droplets can be reintegrated into the water, achieving the effect of gas-water separation and water droplet recovery. At the same time, it also allows the exhaust gas to come into contact with water again, improving the dissolution effect of some substances in the exhaust gas.

[0031] Please see Figure 2-3 The aeration unit 240 also includes an air outlet pipe 243, which is fixedly connected to the aeration box 241. Here, the air outlet pipe 243 is located at the top of the aeration box 241 and is used to discharge exhaust gas.

[0032] Please see Figure 3-4 The filter assembly 100 also includes a pressure relief valve 130, which is installed on the air inlet pipe 110. The outlet of the pressure relief valve 130 is connected to the aeration net 242. Here, when the filter net 122 becomes clogged, the air pressure in the air inlet pipe 110 will rise, exceeding the limit of the pressure relief valve 130. The pressure will overflow from the pressure relief valve 130 into the aeration pipe for direct aeration, using water for filtration. This avoids the danger caused by excessive pressure and also allows for the aeration of the depressurized gas, reducing the harm of direct exhaust gas emissions to a certain extent.

[0033] Please see Figure 3-4 A whistle is installed on the pressure relief valve 130. Here, the pressure relief valve 130 is connected to the aeration net 242 through a pipe, and the whistle is installed inside the pipe. In this way, when the pressure relief valve 130 releases pressure, part of the airflow blows over the whistle to produce a warning sound, reminding personnel to replace the filter 122.

[0034] Please see Figure 1 and 3 A speed reducer 250 is installed on the output shaft of the turbine 210, and the water pump 220 and the turbine 210 are connected through the shaft of the speed reducer 250. Here, the speed of the turbine 210 is much higher than that of the water pump 220, and the speed reducer 250 is used to match the speed difference between the two.

[0035] When this application is used: diesel engine exhaust gas enters through intake pipe 110, is filtered by filter element 120, passes through turbine 210 and enters spray box 231. Turbine 210 drives water pump 220 to pump water from aeration box 241 into pipe network 232. Water curtains are sprayed from multiple nozzles to fully contact the exhaust gas, facilitating the dissolution of some substances in the exhaust gas into water. Then, water droplets collect at the bottom of spray box 231 and enter aeration net 242 together with the exhaust gas. Here, the exhaust gas mixed with water droplets is dispersed from aeration net 242 and fully contacts the water so that the water droplets can re-integrate into the water, achieving the effect of gas-water separation and water droplet recovery. At the same time, it also allows the exhaust gas to contact the water again, improving the dissolution effect of some substances in the exhaust gas.

[0036] In summary, this application utilizes the spraying and aeration processes to more effectively filter out water-soluble components in the exhaust gas, and can separate moisture from the exhaust gas, reducing the amount of moisture carried away by the exhaust gas, thereby reducing water loss.

[0037] It should be noted that the specific models and specifications of filter screen 122, pressure relief valve 130, turbine 210, water pump 220 and reducer 250 need to be selected and determined according to the actual specifications of the device. The specific selection calculation method adopts the existing technology in this field, so it will not be described in detail.

[0038] Finally, it should be noted that the above embodiments are merely examples for clearly illustrating the present invention and are not intended to limit the implementation. Those skilled in the art will recognize that other variations or modifications can be made based on the above description. It is neither necessary nor possible to exhaustively list all possible implementations. However, obvious variations or modifications derived therefrom are still within the scope of protection of this invention.

Claims

1. A treatment device for diesel engine exhaust gas, characterized in that, include A filter assembly includes an air intake pipe and a filter element, wherein the air intake pipe is connected to the filter element; A spray assembly includes a turbine, a water pump, spray elements, and an aeration element. The air inlet of the turbine is connected to the filter element, the air outlet of the turbine is connected to the spray element, the output shaft of the turbine is connected to the shaft of the water pump, the water inlet of the water pump is connected to the aeration element, the water outlet of the water pump is connected to the spray element, and the spray element is connected to the aeration element. The aeration element includes an aeration box and an aeration net, the aeration net being fixedly connected to the inner wall of the aeration box. The spray assembly includes a spray box, and the aeration net is connected to the spray box. The filter assembly also includes a pressure relief valve, which is installed on the air inlet pipe and the air outlet of the pressure relief valve is connected to the aeration net. A whistle is installed on the pressure relief valve.

2. The diesel engine exhaust gas treatment device as described in claim 1, characterized in that, The filter element includes a housing and a filter screen. The air intake pipe is fixedly connected to one end of the housing, the filter screen is inserted into the housing, and the other end of the housing is connected to the air intake of the turbine.

3. The diesel engine exhaust gas treatment device as described in claim 2, characterized in that, The spraying component also includes a pipe network, which is fixedly connected to the inner wall of the spray box. The air outlet of the turbine is connected to the pipe network, and nozzles are evenly arranged on the pipe network.

4. The diesel engine exhaust gas treatment device as described in claim 1, characterized in that, The aeration element also includes an air outlet pipe, which is fixedly connected to the aeration box.

5. The diesel engine exhaust gas treatment device as described in claim 1, characterized in that, A speed reducer is installed on the output shaft of the turbine, and the water pump and the turbine are connected through the speed reducer shaft.

Images