A device for separating sticky light dust from large-volume flue gas

Abstract

The utility model discloses a big wind volume flue gas in viscosity light weight dust separation device relates to flue gas treatment technical field, including the air inlet chamber for receiving engine exhaust flue gas, and the air inlet chamber one end has opened the device import, and the other end of air inlet chamber is linked with baffling unit, and the baffling unit includes the baffle that arranges evenly, and the inner wall on baffle is fixed with the right angle board, and the right angle board includes first board surface and second board surface, and first board surface is fixed perpendicularly on baffle board surface, and first board surface is perpendicular with second board surface, and baffling unit is linked with one end of settling chamber, and the other end of settling chamber is equipped with the device export of the connection flue gas filter type purification equipment, the bottom of air inlet chamber and the bottom of settling chamber all are communicated and install the conical hopper, and the bottom of conical hopper is equipped with the blowdown mouth, and the blowdown mouth place installs the dust valve for periodic cleaning.

Description

Technical Field

[0001] This utility model relates to the field of flue gas treatment technology, and particularly to the field of lightweight dust treatment technology, specifically a device for separating viscous lightweight dust in large-volume flue gas. Background Technology

[0002] Diesel engines are characterized by strong power, good adaptability, and high reliability, and are widely used. Diesel engine research and development and production units usually have large diesel engine testing stations to conduct performance tests on multiple diesel engines simultaneously. Due to incomplete combustion in diesel engines, the exhaust gas contains a large amount of particulate matter and oil, and the particulate matter has low density and is sticky.

[0003] In existing technologies, diesel engine exhaust generated at test stations undergoes centralized treatment, including purification processes such as dust removal, desulfurization, and denitrification. Among these, the dust removal process mainly uses DPF filters. However, due to the large volume of exhaust gas produced, relying solely on gravity settling is ineffective. Furthermore, the exhaust gas contains oil and high concentrations of particulate matter, making the filter element prone to clogging, rapid increase in resistance, and even affecting the normal operation of the vehicle's engine. Utility Model Content

[0004] This invention addresses a series of problems in current diesel engine exhaust gases containing sticky light dust (particulate matter) and oil, where relying solely on gravity settling or resulting in poor filtration and easy clogging of filter media is problematic. It provides a device for separating sticky light dust from large volumes of exhaust gas.

[0005] This utility model is achieved using the following technology:

[0006] This utility model provides a device for separating viscous lightweight dust in large-volume flue gas, including an air inlet chamber for receiving engine exhaust gas, an inlet at one end of the air inlet chamber, and a baffle unit at the other end of the air inlet chamber. The baffle unit includes uniformly arranged baffle plates, and a right-angled plate is fixed on the inner wall of the baffle plates. The right-angled plate includes a first plate surface and a second plate surface. The first plate surface is vertically fixed on the baffle plate surface and is perpendicular to the second plate surface. The baffle unit is connected to one end of a settling chamber, and the other end of the settling chamber is provided with an outlet for connecting to a flue gas filtration and purification device. A conical hopper is installed at the bottom of both the air inlet chamber and the bottom of the settling chamber. A drain port is provided at the bottom of the conical hopper, and an ash discharge valve for periodic cleaning is installed at the drain port.

[0007] In practice, the system includes an intake chamber for receiving engine exhaust gases. One end of the intake chamber has a device inlet connected to the engine exhaust port. The other end of the intake chamber is connected to a baffle unit. The baffle unit includes uniformly arranged baffle plates made of bent thin steel plates. The spacing between two adjacent baffle plates is the same. Further, the spacing between two adjacent baffle plates is 5 to 30 mm, and the bending angle of the baffle plates is 90° to 150°.

[0008] A right-angled plate is fixed on the inner wall of the baffle plate. The right-angled plate includes a first plate surface and a second plate surface. The first plate surface is fixed vertically on the baffle plate surface. The first plate surface is perpendicular to the second plate surface. The lengths of the first plate surface and the second plate surface are equal and are 0.2 to 0.5 times the distance between two adjacent baffle plates.

[0009] The baffle unit is connected to one end of the settling chamber. The cross-sectional area of ​​the settling chamber is larger than the cross-sectional area of ​​the outlet of the baffle unit in order to reduce the flue gas velocity and enhance the settling effect of particulate matter. The other end of the settling chamber is provided with an outlet for a device that connects to flue gas filtration and purification equipment.

[0010] Both the bottom of the air inlet chamber and the bottom of the settling chamber are connected and installed with conical hoppers. The bottom of the conical hoppers is equipped with a drain outlet, and an ash discharge valve for periodic cleaning is installed at the drain outlet.

[0011] In use, this device is installed at the inlet of the centralized flue gas treatment system of a high-volume diesel engine test station. The flue gas emitted by the engine enters the intake chamber through the device inlet, passes through the baffle unit, and the baffle plates in the baffle unit change the airflow direction multiple times. Moreover, the right-angled plates in the baffle unit further change the airflow direction, using centrifugal force to enhance the contact between oil and particulate matter in the flue gas. The oil and particulate matter in the flue gas come into contact and agglomerate into larger particles. The flue gas with oil and particulate matter removed enters the settling chamber. In the settling chamber, the flue gas velocity decreases, and the particulate matter is separated from the flue gas by the settling effect and deposited in the conical hopper at the bottom of the settling chamber. It falls down the hopper wall and settles near the drain outlet. The ash discharge valve is opened periodically to collect and clean the deposited particles. At the same time, the flue gas that has undergone preliminary purification is discharged from the device outlet to subsequent purification equipment, protecting the flue gas filtration purification equipment and extending the service life of the equipment.

[0012] Compared with the prior art, the present invention has the following beneficial effects:

[0013] This invention discloses a high-volume flue gas viscous lightweight dust separation device. It employs an integrated structural design, taking into account the characteristics of diesel engine test station flue gas, such as large volume, high oil content, high particulate matter concentration, and low density. By utilizing baffles to repeatedly change the airflow direction, the resulting centrifugal effect enhances the contact between oil and particulate matter in the flue gas. The oil and particulate matter in the flue gas come into contact and agglomerate into larger particles, which then settle in the settling chamber, separating the particles from the flue gas. This device can be used as a flue gas pretreatment device to remove oil and particulate matter from the flue gas, reducing the load on subsequent flue gas filtration and purification equipment and extending their service life.

[0014] This device is suitable for the pretreatment of flue gas in centralized treatment systems for high-volume diesel engine test stations. It can efficiently remove oil and particulate matter from the flue gas and features high purification efficiency, low resistance, long continuous operation time, and convenient maintenance. It can effectively reduce the load on subsequent flue gas filtration and purification equipment, extend their service life, protect expensive and vulnerable subsequent filtration equipment, reduce the operation and maintenance costs of the entire purification system, and facilitate its widespread application. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the overall structure of the device.

[0016] Figure 2 This is a schematic diagram of the baffle unit structure.

[0017] In the diagram: 1. Device inlet; 2. Air inlet chamber; 3. Baffle unit; 4. Settling chamber; 5. Device outlet; 6. Conical hopper; 7. Ash discharge valve; 8. Baffle plate; 9. Right-angle plate. Detailed Implementation

[0018] The specific embodiments of this utility model will now be described in detail with reference to the accompanying drawings.

[0019] A device for separating viscous, lightweight dust from high-volume flue gas, such as Figures 1-2 As shown, the system includes an intake chamber 2 for receiving engine exhaust gases. One end of the intake chamber 2 has a device inlet 1 connected to the engine exhaust port. The other end of the intake chamber 2 is connected to a baffle unit 3. Specifically, the baffle unit 3 includes an air passage with a fixed frame installed inside. Baffle plates 8 are embedded in the frame via detachable slots or rotating hinges, using existing technology without limitation. Multiple layers of baffle plates 8 can be provided, with each layer of baffle plates 8 evenly arranged. The baffle plates 8 are made of thin steel plates bent into shape, and the spacing between two adjacent baffle plates 8 is the same. In this embodiment, the spacing a between two adjacent baffle plates 8 is 5 to 30 mm, and the bending angle b of the baffle plates is 90° to 150°. In this embodiment, b is 90°.

[0020] A right-angled plate 9 is fixed on the inner wall of the baffle plate 8. The right-angled plate 9 includes a first plate surface and a second plate surface. The first plate surface is fixed vertically on the plate surface of the baffle plate 8. The first plate surface is perpendicular to the second plate surface. The lengths c of the first plate surface and the second plate surface are equal and are 0.2 to 0.5 times the distance between two adjacent baffle plates 8, that is, c / a = 0.2 to 0.5.

[0021] The baffle unit 3 is connected to one end of the settling chamber 4. The cross-sectional area of ​​the settling chamber 4 is larger than the outlet cross-sectional area of ​​the baffle unit 3 in order to reduce the flue gas velocity and enhance the settling effect of particulate matter. The other end of the settling chamber 4 is provided with a device outlet 5 for connecting flue gas filtration and purification equipment.

[0022] The bottom of the air inlet chamber 2 and the bottom of the settling chamber 4 are both connected to a conical hopper 6. The bottom of the conical hopper 6 is provided with a drain port, and an ash discharge valve 7 for periodic cleaning is installed at the drain port.

[0023] In use, this device is installed at the inlet of the centralized flue gas treatment system of a high-volume diesel engine test station. The flue gas emitted by the engine enters the intake chamber 2 through the device inlet 1, passes through the baffle unit 3, and the baffle plates 8 in the baffle unit 3 change the airflow direction multiple times. Moreover, the right-angled plates 9 in the baffle unit 3 further change the airflow direction, using centrifugal force to enhance the contact between oil and particulate matter in the flue gas. The oil and particulate matter in the flue gas come into contact and agglomerate into larger particles. The flue gas with oil and particulate matter removed enters the settling chamber 4. In the settling chamber 4, the flue gas velocity decreases, and the particulate matter is separated from the flue gas by the settling effect and deposited in the conical hopper 6 at the bottom of the settling chamber 4. It falls down the hopper wall of the conical hopper 6 and settles near the drain outlet. The ash discharge valve 7 is opened periodically to collect and clean the deposited particulate matter. At the same time, the flue gas that has undergone preliminary purification is discharged from the device outlet 5 to subsequent purification equipment, protecting the flue gas filtration purification equipment and extending the service life of the equipment.

[0024] The scope of protection claimed by this utility model is not limited to the specific embodiments described above. Moreover, for those skilled in the art, this utility model can have various modifications and alterations. Any modifications, improvements, and equivalent substitutions made within the concept and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A device for separating viscous, lightweight dust from large-volume flue gas, characterized in that: It includes an intake chamber (2) for receiving exhaust gas from the engine, one end of which has a device inlet (1), and the other end of which is connected to a baffle unit (3). The baffle unit (3) includes baffle plates (8) evenly arranged, and a right-angled plate (9) is fixed on the inner wall of the baffle plate (8). The right-angled plate (9) includes a first plate surface and a second plate surface. The first plate surface is vertically fixed on the baffle plate (8) and the first plate surface is perpendicular to the second plate surface. The baffle unit (3) is connected to a settling chamber (4) at one end, and the other end of the settling chamber (4) is provided with a device outlet (5) for connecting to a flue gas filtration and purification device. The bottom of the air inlet chamber (2) and the bottom of the settling chamber (4) are both connected to a conical bucket (6). The bottom of the conical bucket (6) is provided with a drain outlet, and a ash discharge valve (7) for periodic cleaning is installed at the drain outlet.

2. The device for separating viscous lightweight dust in large-volume flue gas according to claim 1, characterized in that: The spacing between two adjacent baffles (8) is the same, and the bending angle of the baffles is 90° to 150°.

3. The device for separating viscous lightweight dust in large-volume flue gas according to claim 2, characterized in that: The distance between two adjacent baffles (8) is 5 to 30 mm.

4. The device for separating viscous lightweight dust in large-volume flue gas according to claim 2, characterized in that: The lengths of the first plate and the second plate are equal, and are 0.2 to 0.5 times the distance between two adjacent baffles (8).

5. The device for separating viscous lightweight dust in large-volume flue gas according to claim 1, characterized in that: The baffle plate (8) is made of thin steel plate by bending.

6. The device for separating viscous lightweight dust in large-volume flue gas according to claim 1, characterized in that: The cross-sectional area of ​​the settling chamber (4) is larger than the outlet cross-sectional area of ​​the baffle unit (3) to reduce the flue gas velocity.

Images