Diesel engine exhaust treatment device

Abstract

This invention discloses a diesel generator exhaust gas treatment device, including a housing. A guide plate is installed inside the housing, and an activated carbon adsorption layer is installed between the top of the guide plate and the housing. An exhaust fan with an exhaust pipe is installed at the bottom of the other side of the guide plate. A first catalytic layer and a second catalytic layer are respectively installed on both sides of the guide plate, and filter screens are installed on the upper and lower surfaces of both the first and second catalytic layers. A transmission gear is rotatably installed on the inner wall of the housing, and the transmission gear is driven by contact blocks. Two contact blocks contact the lower filter screen of the first catalytic layer and the upper filter screen of the second catalytic layer, respectively. The transmission gear is elastically connected to the housing. A cleaning structure is provided, which drives the contact blocks on both sides away from the lower and upper filters, respectively. Then, the transmission gear, under the elastic potential energy of a return spring, drives the contact blocks to contact the vibrating screen surface, thereby vibrating the accumulated impurities on the screen surface to prevent accumulation.

Description

Technical Field

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

[0002] Diesel generators produce a large amount of exhaust gas during power generation due to the combustion of diesel fuel. This exhaust gas contains many harmful components, such as carbon monoxide, hydrocarbons, nitrogen oxides, and sulfur dioxide. Direct emission of these toxic gases would cause air pollution. Therefore, exhaust gas absorption and purification devices are needed to treat the exhaust gas. Diesel generator exhaust gas absorption and purification devices can effectively remove toxic gases from the exhaust gas, thereby effectively reducing the air pollution caused by exhaust gas emissions. It is a relatively environmentally friendly treatment device.

[0003] Existing exhaust gas treatment devices, such as the environmentally friendly diesel generator exhaust gas absorption and purification treatment device disclosed in CN109339920B, include a treatment box. A first cleaning door and a second cleaning door are arranged parallel to each other on the front side of the treatment box. The second cleaning door is located below the first cleaning door. An inspection door is provided on the upper side of the treatment box, and a muffler is provided on one side surface of the treatment box. An air intake pipe is connected to the lower surface of the muffler.

[0004] While this exhaust gas treatment device performs catalytic filtration, the filter screens on the upper and lower surfaces of the catalytic layer tend to accumulate impurities as filtration time increases, thus affecting the airflow rate inside the chamber and the efficiency of exhaust gas purification. At the same time, the exhaust gas is atomized, increasing its humidity. This treatment device does not dry the exhaust gas, which also affects the purification efficiency. Summary of the Invention

[0005] The purpose of this invention is to solve the problems of impurities accumulating on the upper and lower filter screens of the catalyst layer in the above-mentioned background technology over time, which affects the purification efficiency and the lack of a gas drying device, and to propose a diesel generator exhaust gas treatment device.

[0006] The objective of this invention can be achieved through the following technical solutions:

[0007] A diesel generator exhaust gas treatment device includes a housing with an inner cavity. A guide plate is installed within the inner cavity. An activated carbon adsorption layer is installed between the top of the guide plate and the housing. A liquid storage tank containing neutralizing liquid is located on one side of the bottom of the guide plate. An air inlet pipe outside the housing extends below the surface of the neutralizing liquid. An exhaust fan is installed at the bottom of the other side of the guide plate, with an exhaust pipe extending from the inner cavity of the housing to the outside. A ventilation filter is installed above the liquid storage tank, and a drying layer is installed above the exhaust fan. A first catalytic layer and a second catalytic layer are respectively installed on both sides of the guide plate, and filters are installed on the upper and lower surfaces of both the first and second catalytic layers.

[0008] The inner wall of the enclosure is provided with a cleaning structure, which includes:

[0009] The mounting slot is located on the inner wall of the box. A transmission gear is rotatably installed in the mounting slot, and a transmission rack is meshed on both sides of the transmission gear.

[0010] The limiting groove is set on both sides of the inner cavity wall of the box. The limiting groove connects the mounting groove to the inner cavity of the box. The limiting groove is slidably connected to the limiting block, and the limiting block is fixedly connected to the transmission rack.

[0011] The contact block is fixedly connected to the limiting block, and the two contact blocks respectively contact the lower filter screen of the first catalyst layer and the upper filter screen of the second catalyst layer.

[0012] The rotating shaft is coaxially connected to the transmission gear, and the rotating shaft is elastically connected to the inner wall of the housing.

[0013] As a further aspect of the present invention: a return spring is provided on the surface of the rotating shaft, and the two ends of the return spring are fixedly connected to the rotating shaft and the inner wall of the housing.

[0014] As a further aspect of the present invention, a nozzle is provided at one end of the air intake pipe.

[0015] As a further aspect of the present invention, a corona electrode is provided at the bottom of the drying layer.

[0016] As a further aspect of the present invention: an air guide tube is provided on one side of the exhaust fan, and an air collection hood is provided above the air guide tube.

[0017] As a further aspect of the present invention: a rotating handle is provided on the outside of the housing, and the rotating handle is coaxially connected to the rotating shaft.

[0018] The beneficial effects of this invention are:

[0019] (1) The diesel generator exhaust gas treatment device of the present invention is provided with a guide plate, which divides the inner cavity of the housing into two areas, thereby changing the flow direction of the exhaust gas to be treated in the inner cavity, so that the subsequent cleaning structure can clean the mesh surface set on the surface of the first catalyst layer and the second catalyst layer. At the same time, the guide plate changes the air flow direction, so that the working of the exhaust fan indirectly drives the air flow in the housing, preventing the neutralizing liquid from splashing in the inner cavity due to the hydraulic pressure caused by the direct action of the exhaust fan.

[0020] (2) The diesel generator exhaust gas treatment device of the present invention has a cleaning structure. The transmission gear of the cleaning structure drives the contact blocks on both sides to move away from the first filter lower screen and the second filter upper screen respectively. Then, the transmission gear is driven by the elastic potential energy of the reset spring to drive the contact blocks to contact the vibrating screen surface, thereby causing the impurities accumulated on the screen surface to vibrate and prevent accumulation.

[0021] (3) The diesel generator exhaust gas treatment device of the present invention is provided with a ventilation filter and a drying layer. The ventilation filter and the drying layer can not only filter and dry, but also prevent impurities that are ejected by the vibration of the upper contact block from falling to the lower part and contaminating the neutralizing liquid or being discharged with the exhaust pipe. Attached Figure Description

[0022] The invention will now be further described with reference to the accompanying drawings.

[0023] Figure 1 This is a schematic diagram of the structure of the diesel generator exhaust gas treatment device of the present invention;

[0024] Figure 2 This is a cross-sectional schematic diagram of the diesel generator exhaust gas treatment device of the present invention;

[0025] Figure 3 This is a partially enlarged view of the diesel generator exhaust gas treatment device of the present invention;

[0026] Figure 4 This is a schematic diagram of the cleaning structure of the present invention;

[0027] Figure 5 This is a cross-sectional schematic diagram of the cleaning structure of the present invention.

[0028] In the diagram: 1. Housing; 2. Air inlet pipe; 21. Nozzle; 3. Liquid storage tank; 4. Neutralizing liquid; 5. Ventilation filter; 6. First catalytic layer; 61. First filter screen; 62. First filter lower screen; 7. Guide plate; 8. Activated carbon adsorption layer; 9. Second catalytic layer; 91. Second filter screen; 92. Second filter lower screen; 10. Cleaning structure; 101. Contact block; 102. Limiting block; 103. Limiting groove; 104. Mounting groove; 105. Transmission gear; 106. Transmission rack; 107. Rotating shaft; 108. Return spring; 109. Rotating handle; 11. Drying layer; 12. Corona electrode; 13. Gas collection hood; 14. Air guide tube; 15. Exhaust fan; 16. Air outlet pipe. Detailed Implementation

[0029] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0030] Example 1

[0031] Please see Figure 1-5As shown, this invention is a diesel generator exhaust gas treatment device, including a housing 1. The housing 1 has an internal cavity, and a guide plate 7 divides the internal cavity into two parts. An activated carbon adsorption layer 8 is disposed between the top of the guide plate 7 and the internal cavity of the housing 1, allowing air to flow through the activated carbon adsorption layer 8. A liquid storage tank 3 is disposed on one side of the bottom of the guide plate 7, containing an alkaline neutralizing liquid 4 for neutralizing acidic gases. An air inlet pipe 2 is disposed on the outer surface of the housing 1, connecting to the exhaust gas end of the diesel generator. One end of the air inlet pipe 2 extends into the liquid storage tank 3 within the internal cavity of the housing 1, and a nozzle 21 is disposed at one end of the air inlet pipe 2, submerged below the surface of the neutralizing liquid 4. A ventilation filter 5 is disposed above the liquid storage tank 3, and the ventilation filter 5 is fixedly connected to the guide plate 7 and the internal cavity of the housing 1. A first catalytic layer 6 is disposed above the ventilation filter 5. A first upper filter screen 61 and a first lower filter screen 62 are respectively disposed on the upper and lower surfaces of the first catalytic layer 6. A second catalytic layer 9 is disposed on the side of the guide plate 7 away from the liquid storage tank 3. A second upper filter screen 91 and a second lower filter screen 92 are respectively disposed on the upper and lower surfaces of the second catalytic layer 9. A drying layer 11 is disposed below the second catalytic layer 9, and the drying layer 11 is fixedly connected to the guide plate 7 and the inner wall of the housing 1. A corona electrode 12 is disposed below the drying layer 11, and an exhaust fan 15 is disposed below the corona electrode 12. One end of the exhaust fan 15 is connected to a gas guide tube 14, which is fixedly connected to the bottom of the inner cavity. A gas collection hood 13 is disposed above the gas guide tube 14. An exhaust pipe 16 is connected to the output end of the exhaust fan 15, and the exhaust pipe 16 extends from the inner cavity of the housing 1 to the outside of the housing 1.

[0032] A cleaning structure 10 is provided between the inner walls of the housing 1. Contact blocks 101 on both sides of the cleaning structure 10 are respectively positioned below the first lower filter screen 62 and above the second upper filter screen 91, allowing the two contact blocks 101 to contact the mesh surfaces of the two filter screens. An installation groove 104 is provided within the inner wall of the housing 1. Two limiting grooves 103 are provided on the side of the inner cavity of the housing 1 closest to the installation groove 104, connecting the inner cavity to the installation groove 104. Limiting blocks 102 are fixedly connected to one side of each limiting groove 103 of the two contact blocks 101, and the limiting blocks 102 are slidably connected within their respective limiting grooves 103. A transmission gear 105 is rotatably mounted within the mounting slot 104. A transmission rack 106 is meshed between the two ends of the transmission gear 105. The transmission rack 106 is fixedly connected to a nearby corresponding limiting block 102. Through the cooperation of the limiting block 102 and the limiting slot 103, the transmission rack 106 slides within the mounting slot 104 along a fixed trajectory. A rotating handle 109 is rotatably mounted on the outer side of the housing 1. A rotating shaft 107 is positioned between the rotating handle 109 and the transmission gear 105. A return spring 108 is mounted on the surface of the rotating shaft 107, with its two ends connected to the rotating shaft 107 and the inner wall of the housing 1, respectively.

[0033] When using this diesel generator exhaust gas treatment device, the diesel generator exhaust gas enters the intake pipe 2. The exhaust gas to be treated enters the inner cavity of the housing 1 through the intake pipe 2. The exhaust gas comes into contact with the neutralizing liquid 4 through the nozzle 21 at one end of the intake pipe 2. The acidic gas in the exhaust gas is neutralized by the alkaline neutralizing liquid 4 and then emerges from the liquid surface. At the same time, the exhaust fan 15 is started, which causes the air in the inner cavity of the housing 1 to start flowing. Then, the deacidified exhaust gas moves upward and passes through the ventilation filter 5. Then, the exhaust gas passes through the first lower filter screen 62, the first catalytic layer 6, and the first upper filter screen 61 in sequence for the first catalytic reaction. Then, the exhaust gas passes through the activated carbon adsorption layer 8 for deep adsorption, which adsorbs the pollutants in the exhaust gas. Then, the exhaust gas passes through the second upper filter screen 91, the second catalytic layer 9, and the second lower filter screen 92 for the second catalytic reaction. At this point, the exhaust gas has been treated. The exhaust gas passes through the drying layer 11 below to dry it and remove the moisture in the gas. Then, it enters the corona motor below for corona treatment. Finally, the exhaust gas enters the gas guide tube 14 from the gas collection hood 13, and is then discharged from the exhaust pipe 16 through the exhaust fan 15. When the exhaust gas treatment time in the housing 1 is too long, the filter screens set on the upper and lower surfaces of the first catalyst layer 6 and the second catalyst layer 9 will accumulate a lot of impurities, thereby affecting the gas passage rate and purification efficiency. By rotating the handle 109 on the outside of the housing 1, the handle 109 drives the transmission gear 105 to rotate. When the transmission gear 105 rotates, it drives the transmission racks 106 on both sides to slide upward and downward respectively. The transmission racks 106 drive the contact block 101 away from the first lower filter screen 62 and the second filter screen 91 through the limit block 102. At this time, the rotating shaft 107 rotates itself, which increases the elastic potential energy of the return spring 108 on the surface. After releasing the handle 109, the return spring 108 releases its own elastic potential energy, driving the rotating shaft 107 and the transmission gear 105 to rotate. The transmission rack 106 drives the connected contact block 101 to quickly reset. When the contact block 101 resets, it contacts the first lower filter screen 62 and the second filter screen 91, vibrating the impurities accumulated on the screen, thereby preventing the screen from becoming clogged and affecting the airflow rate and filtration efficiency. Some impurities are shaken off the mesh and fall onto the top of the ventilation filter 5 or the drying layer 11 below, preventing the cleaned impurities from contaminating the neutralizing liquid 4 below, and also preventing impurities from entering the exhaust pipe 16 and being discharged with the treated exhaust gas.

[0034] The working principle of this invention: The diesel generator exhaust gas treatment device of this invention, by setting a guide plate 7, divides the inner cavity of the housing 1 into two areas, thereby changing the flow direction of the exhaust gas to be treated in the inner cavity. This allows the subsequent cleaning structure 10 to clean the mesh surface set on the first catalyst layer 6 and the second catalyst layer 9. At the same time, the guide plate 7 changes the airflow direction, causing the exhaust fan 15 to indirectly drive the airflow in the housing 1, preventing the neutralizing liquid 4 from splashing in the inner cavity due to hydraulic pressure caused by the direct action of the exhaust fan 15. By setting the cleaning structure 10, the exhaust gas is effectively cleaned. The transmission gear 105 of the filter structure 10 drives the contact blocks 101 on both sides to move away from the first lower filter screen 62 and the second upper filter screen 91 respectively. Then, the transmission gear 105 is driven by the elastic potential energy of the reset spring 108 to drive the contact blocks 101 to contact the vibrating screen surface, thereby causing the impurities accumulated on the screen surface to vibrate and prevent accumulation. By setting the ventilation filter screen 5 and the drying layer 11, the ventilation filter screen 5 and the drying layer 11 can not only play the role of filtration and drying, but also prevent the impurities that are vibrated and ejected from the upper contact block 101 from falling to the lower part and contaminating the neutralizing liquid 4 or being discharged with the air outlet pipe 16.

[0035] Example 2

[0036] The method of using the diesel generator exhaust gas treatment device of the present invention includes the following steps:

[0037] Step 1: The exhaust gas from the diesel generator enters the intake pipe 2. The exhaust gas to be treated enters the inner cavity of the housing 1 through the intake pipe 2. The exhaust gas comes into contact with the neutralizing liquid 4 through the nozzle 21 at one end of the intake pipe 2. The acidic gas in the exhaust gas is neutralized by the alkaline neutralizing liquid 4 and then emerges from the liquid surface.

[0038] Step 2: Simultaneously start the exhaust fan 15. The exhaust fan 15 causes the air in the inner cavity of the housing 1 to start flowing. Then, the exhaust gas after acidification moves upward and passes through the ventilation filter 5. Then, the exhaust gas passes through the first lower filter screen 62, the first catalytic layer 6, and the first upper filter screen 61 in sequence to carry out the first catalytic reaction.

[0039] Step 3: The exhaust gas then undergoes deep adsorption through the activated carbon adsorption layer 8 to remove pollutants. Subsequently, the exhaust gas passes through the second filter screen 91, the second catalytic layer 9, and the second lower filter screen 92 for a second catalytic reaction treatment.

[0040] Step 4: At this point, the exhaust gas has been treated. It passes through the drying layer 11 below to remove moisture, and then enters the corona motor below for corona treatment. Finally, the exhaust gas enters the gas guide tube 14 from the gas collection hood 13, and is then discharged from the exhaust pipe 16 through the exhaust fan 15.

[0041] Step 5: By rotating the handle 109 on the outside of the housing 1, the handle 109 drives the transmission gear 105 to rotate. When the transmission gear 105 rotates, it drives the transmission racks 106 on both sides to slide upwards and downwards respectively. The transmission racks 106 drive the contact blocks 101 away from the first lower filter screen 62 and the second filter screen 91 through the limit block 102. At this time, the rotating shaft 107 rotates itself, which increases the elastic potential energy of the return spring 108 on the surface. After releasing the handle 109, the return spring 108 releases its own elastic potential energy, driving the rotating shaft 107 and the transmission gear 105 to rotate. Through the transmission rack 106, the connected contact blocks 101 are driven to quickly reset. When the contact blocks 101 reset, they contact the first lower filter screen 62 and the second filter screen 91, vibrating the impurities accumulated on the screen, thereby preventing the screen from becoming clogged and affecting the airflow rate and filtration efficiency.

[0042] The foregoing has provided a detailed description of one embodiment of the present invention, but this description is merely a preferred embodiment and should not be construed as limiting the scope of the invention. All equivalent variations and modifications made within the scope of the claims of this invention should still fall within the patent coverage of this invention.

Claims

1. A diesel generator exhaust gas treatment device, comprising a housing (1) having an inner cavity, characterized in that, A guide plate (7) is provided in the inner cavity of the box (1). An activated carbon adsorption layer (8) is provided between the top of the guide plate (7) and the box (1). A liquid storage tank (3) is provided on one side of the bottom of the guide plate (7). A neutralizing liquid (4) is provided inside the liquid storage tank (3). An air inlet pipe (2) outside the box (1) extends below the liquid surface of the neutralizing liquid (4). A blower (15) is provided at the bottom of the other side of the guide plate (7). An air outlet pipe (16) is provided on the blower (15). The air outlet pipe (16) extends from the inner cavity of the box (1) to the outside. A ventilation filter (5) is provided above the liquid storage tank (3). A drying layer (11) is provided above the blower (15). A first catalyst layer (6) and a second catalyst layer (9) are provided on both sides of the guide plate (7). Filters are provided on the upper and lower surfaces of the first catalyst layer (6) and the second catalyst layer (9). The inner wall of the housing (1) is provided with a cleaning structure (10), the cleaning structure (10) comprising: The mounting slot (104) is set on the inner wall of the housing (1). A transmission gear (105) is rotatably installed in the mounting slot (104). A transmission rack (106) is meshed on both sides of the transmission gear (105). The limiting groove (103) is provided on both sides of the inner wall of the housing (1). The limiting groove (103) connects the mounting groove (104) with the inner cavity of the housing (1). The limiting groove (103) is slidably connected to the limiting block (102). The limiting block (102) is fixedly connected to the transmission rack (106). Contact block (101), which is fixedly connected to limiting block (102), the two contact blocks (101) respectively contact the lower filter screen of the first catalyst layer (6) and the upper filter screen of the second catalyst layer (9); A rotating shaft (107) is coaxially connected to a transmission gear (105), and the rotating shaft (107) is elastically connected to the inner wall of the housing (1).

2. The diesel generator exhaust gas treatment device according to claim 1, characterized in that, A return spring (108) is provided on the surface of the rotating shaft (107), and the two ends of the return spring (108) are fixedly connected to the rotating shaft (107) and the inner wall of the housing (1).

3. The diesel generator exhaust gas treatment device according to claim 1, characterized in that, A nozzle (21) is provided at one end of the air intake pipe (2).

4. The diesel generator exhaust gas treatment device according to claim 1, characterized in that, A corona electrode (12) is provided at the bottom of the drying layer (11).

5. The diesel generator exhaust gas treatment device according to claim 1, characterized in that, An air guide tube (14) is provided on one side of the exhaust fan (15), and an air collection hood (13) is provided above the air guide tube (14).

6. The diesel generator exhaust gas treatment device according to claim 1, characterized in that, A rotating handle (109) is provided on the outside of the housing (1), and the rotating handle (109) is coaxially connected to the rotating shaft (107).

Images