Engine tail gas treatment device

Abstract

The invention relates to the technical field of tail gas treatment, and discloses an engine tail gas treatment device which comprises a bin body, a liquid filtering bin, a tail gas connecting pipe and an exhaust pipe are arranged in the bin body, the bottom of the tail gas connecting pipe is fixedly connected with a particle filter in the liquid filtering bin, and the exhaust pipe is arranged at the top of the bin body. The first-stage bin, the second-stage bin and the third-stage bin are vertically arranged above the liquid filtering bin from bottom to top, and cavities of the second-stage bin and the third-stage bin are shaped like an inclined Chinese character'shan '; according to the technical scheme, the vertically-distributed inclined E-shaped cavity is adopted, inclined downward guiding flow, horizontal labyrinth flow division, convection and confluence of mixed gas are achieved by overcoming lifting force, the residence time of the gas is prolonged, and meanwhile vertical interval flow division of the gas and condensate is achieved. In a limited space, a simple structure is adopted, and the purposes of gas retention, condensation and flow division are achieved through power hindering. The gas condensation and backflow effects are improved; and the humidity of discharged gas is reduced.

Description

Technical Field

[0001] The present invention relates to the technical field of tail gas treatment, in particular to an engine tail gas treatment device. Background Art

[0002] Engine exhaust has the characteristics of particulate impurities and high temperature. In order to protect the environment, the exhaust needs to be treated and discharged.

[0003] Currently, the simplest way is to discharge the engine exhaust into water, which cools the exhaust gas to produce water vapor. At the same time, the particles are filtered and captured by the water body, and the generated water vapor and impurity gases are discharged. This method can greatly reduce the harm of exhaust gas to the environment.

[0004] A Chinese patent discloses an engine exhaust treatment device (CN101139943B). This patent uses a double-chamber form for filtering, which has the following disadvantages:

[0005] 1. Using the form of horizontal double longitudinal filtration, most of the exhaust gas rises in the first chamber and transfers to the second chamber, and only a small amount of exhaust gas enters the second chamber through the connecting cavity, resulting in insufficient exhaust gas in the second chamber.

[0006] 2. Affected by the liquid level, in order to increase the gas discharge stroke and allow the gas to fully condense and reflux, this device needs to ensure a certain height to meet the gas retention time in the warehouse. In the dual-chamber state, the second chamber does not fully utilize the volume advantage. Summary of the Invention

[0007] The present invention aims to provide an engine exhaust treatment device. This technical solution utilizes vertically distributed, inclined "mountain"-shaped cavities to guide the flow of mixed gases under tilted conditions, overcome lift forces, and achieve horizontal, labyrinthine diversion, convection, and confluence, increasing gas retention time while also achieving vertical, spaced diversion of gas and condensate. This simple structure utilizes dynamic obstruction within a limited space to achieve gas retention and condensation diversion. This improves gas condensation and reflux, and reduces exhaust gas humidity, thereby addressing the issues raised in the aforementioned background art.

[0008] To achieve the above object, the present invention provides the following technical solutions:

[0009] The engine exhaust treatment device includes a warehouse body, in which a liquid filter warehouse, an exhaust gas connecting pipe and an exhaust pipe are arranged. The bottom of the exhaust gas connecting pipe is fixedly connected to the particulate filter in the liquid filter warehouse, and the exhaust pipe is arranged on the top of the warehouse body. It also includes a primary warehouse, a secondary warehouse and a tertiary warehouse vertically arranged from bottom to top above the liquid filter warehouse. The cavity shape of the secondary warehouse and the tertiary warehouse is an inclined "mountain" shape. The primary warehouse is connected to the two side cavities of the secondary warehouse, and the secondary warehouse is connected to the middle cavity of the tertiary warehouse. A horizontal pipe is provided at the bottom of the exhaust pipe, and the horizontal pipe is respectively connected to the side cavity and the middle cavity of the tertiary warehouse.

[0010] As a further solution of the present invention: the first-level warehouse is formed by dividing the warehouse body by inclined partitions and partitions, and the second-level warehouse is divided by two of the inclined partitions. The two inclined partitions are closed by vertical plates to divide the second-level warehouse into a second-level side warehouse, a second-level connecting warehouse and a second-level middle warehouse that are interconnected.

[0011] As a further solution of the present invention: the first-level warehouse and the two second-level side warehouses are connected through a first-level ascending port.

[0012] As a further solution of the present invention: the liquid filtration chamber and the first-level chamber are sealed by a partition, and a pore area is opened on the partition, and the pore area is located on a side away from the first-level rising port.

[0013] As a further solution of the present invention: the three-level warehouse is divided into three-level side warehouses, three-level connecting warehouses, and three-level middle warehouses by the top surface of the warehouse body, the inclined partition and two vertical plates. A second-level rising warehouse is opened on the top of the second-level middle warehouse, and the second-level rising warehouse is connected to the third-level middle warehouse.

[0014] As a further solution of the present invention: both ends of the horizontal pipe extend to the interior of the third-level side bin, and the circumferential surface of the horizontal pipe is provided with annularly distributed through holes, the through holes are located below the exhaust pipe, and the first-level riser is located directly above the second-level riser.

[0015] As a further solution of the present invention: the inclined partition is fixed obliquely on the inner wall of the warehouse body.

[0016] As a further solution of the present invention: condensation drainers are provided at the two corners of the bottom end of the inclined partition, and the condensation drainers include an inclined mouth and an inclined trapezoidal plate. The inclined trapezoidal plate is fixedly connected to the bottom of the inclined mouth, and the short side of the inclined trapezoidal plate forms a triangular falling channel with the warehouse body.

[0017] Compared with the prior art, the present invention has the following beneficial effects:

[0018] This technical solution utilizes vertically distributed, inclined "mountain"-shaped cavities to guide the flow of mixed gases under lift, achieving horizontal labyrinthine diversion, convection, and confluence, increasing gas retention time while achieving vertical separation of gas and condensate. Within a limited space, this simple structure utilizes dynamic obstruction to achieve gas retention, condensation, and diversion. This improves gas condensation and reflux, while reducing exhaust gas humidity. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following briefly introduces the drawings required for use in the embodiments or descriptions of the prior art. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0020] Figure 1 A three-dimensional schematic diagram of the engine exhaust treatment device with the outer casing removed;

[0021] Figure 2 is a cross-sectional schematic diagram of an engine exhaust treatment device;

[0022] Figure 3 is a top cross-sectional schematic diagram of an engine exhaust treatment device;

[0023] Figure 4 This is a three-dimensional schematic diagram of the engine exhaust treatment device with the outer shell removed;

[0024] Figure 5 A perspective schematic diagram of the engine exhaust treatment device from another perspective with the outer shell removed;

[0025] Figure 6 Schematic diagram of the exhaust gas passage of the engine exhaust treatment device from two perspectives after the outer shell is removed;

[0026] Figure 7 is a three-dimensional schematic diagram of an exhaust pipe in an engine exhaust treatment device;

[0027] Figure 8 is a three-dimensional schematic diagram of an engine exhaust treatment device;

[0028] In the figure: 100, liquid filtration chamber; 200, first-level chamber; 201, first-level riser; 300, second-level chamber; 301, second-level side chamber; 302, second-level connecting chamber; 303, second-level middle chamber; 304, second-level riser; 400, third-level chamber; 401, third-level side chamber; 402, third-level connecting chamber; 403, third-level middle chamber; 1, exhaust gas connecting pipe; 2, exhaust pipe; 21, horizontal pipe; 22, through hole; 3, inclined partition; 4, condensate drainer; 41, inclined mouth; 42, inclined trapezoidal plate. DETAILED DESCRIPTION

[0029] See also Figures 1-8 In order to optimize the trajectory of the mixed gas composed of steam and impurity-removed tail gas under a fixed vertical distance and extend the residence time of the mixed gas to condense and remove water, this embodiment makes the following improvements:

[0030] The improved content includes a warehouse body, in which a liquid filter warehouse 100, an exhaust gas connecting pipe 1, and an exhaust pipe 2 are arranged. The bottom of the exhaust gas connecting pipe 1 is fixedly connected to the particulate filter in the liquid filter warehouse 100, and the exhaust pipe 2 is arranged on the top of the warehouse body. It also includes a first-level warehouse 200, a second-level warehouse 300, and a third-level warehouse 400 vertically arranged from bottom to top above the liquid filter warehouse 100. The cavity shape of the second-level warehouse 300 and the third-level warehouse 400 is an inclined "mountain" shape. The first-level warehouse 200 is connected to the two side cavities of the second-level warehouse 300, and the second-level warehouse 300 is connected to the middle cavity of the third-level warehouse 400. A horizontal pipe 21 is provided at the bottom of the exhaust pipe 2, and the horizontal pipe 21 is respectively connected to the side cavity and the middle cavity of the third-level warehouse 400.

[0031] In the improved principle, the flue gas retention in stage I:

[0032] See also Figure 1 and Figure 6 Liquid is contained within liquid filter chamber 100, and exhaust gas enters this chamber through exhaust gas connecting pipe 1, the end of which is provided with a hood. The high-temperature exhaust gas comes into contact with the liquid within liquid filter chamber 100, cooling the gas and causing the liquid to boil. Impurities are filtered through liquid filter chamber 100 and the hood, while steam and filtered exhaust gas rise and enter primary chamber 200.

[0033] Effect I: The mixed gas is guided through the first-level warehouse 200 and first enters the "mountain"-shaped second-level warehouse 300. Since the second-level warehouse 300 is tilted, the exhaust gas in the first-level warehouse 200 vertically enters the high end of the variable cavity of the second-level warehouse 300. The mixed gas rises, but the second-level warehouse 300 is tilted downward at this time. The mixed gas needs to overcome the lift and move toward the lower end along the top surface of the second-level warehouse 300. The top surface of the second-level warehouse 300 hinders the kinetic energy of the mixed gas, and the mixed gas slows down and moves downward. After entering the middle cavity of the second-level warehouse 300, the mixed gas begins to rise. This makes effective use of the horizontal space. The inclined "mountain"-shaped cavity allows the mixed gas to overcome gravity and descend while changing its trajectory in the horizontal direction to rise a second time, which fully increases the residence time of the mixed gas in a limited space.

[0034] Effect II: When the mixed gas passes through the side chamber of the secondary chamber 300 and enters the middle chamber of the secondary chamber 300, a portion of the two mixed gases will be in vertical relative contact, and the flow direction formed by the relatively contacting mixed gases will be complicated, further reducing the speed of the mixed gas and increasing the residence time.

[0035] Effect III: The bottom surface of the secondary chamber 300 is inclined, so the mixed gas entering the secondary chamber 300 through the primary chamber 200 flows along the top surface of the secondary chamber 300. The trapped condensed liquid falls due to gravity, flowing along the lower inclined surface of the secondary chamber 300 to the bottom. The resulting technical effect is that the mixed gas and condensed liquid flow in the same horizontal direction, but in separate layers, avoiding the problem of increased humidity in the mixed gas caused by the synchronous contact movement of the condensed liquid and the mixed gas.

[0036] The specific implementation method is as follows: the first-level warehouse 200 is formed by separating the warehouse body through an inclined partition 3 and a partition, and the second-level warehouse 300 is divided by two inclined partitions 3. The inclined partition 3 is fixed obliquely on the inner wall of the warehouse body. The two inclined partitions 3 are closed by a vertical plate to separate the second-level warehouse 300 into a second-level side warehouse 301, a second-level connecting warehouse 302 and a second-level middle warehouse 303 that are interconnected. The first-level warehouse 200 and the two second-level side warehouses 301 are connected through a first-level rising port 201. The liquid filtration warehouse 100 and the first-level warehouse 200 are closed by a partition. An air hole area is opened on the partition, and the air hole area is located on the side away from the first-level rising port 201.

[0037] The mixed gas rises through the pore area, which prevents large amounts of liquid from the liquid filtration chamber 100 from entering the primary chamber 200 as the entire device moves with the vehicle. After the mixed gas rises vertically through the pore area, the lift is affected by the slope of the inclined partition 3 and moves upward to the primary riser 201. Separated by the vertical plate, the mixed gas must pass through the top surface of the secondary chamber 300 and move downward in an inclined manner to the secondary connecting chamber 302. From the secondary connecting chamber 302, the mixed gas moves toward the secondary middle chamber 303. After the two mixed gas streams flow relative to each other in the secondary connecting chamber 302, generating a small amount of turbulence, kinetic energy loss, or a more irregular flow pattern, the mixed gas, influenced by the lift, flows along the top surface of the secondary chamber 300 toward the secondary middle chamber 303.

[0038] Mixed gas retention in stage II:

[0039] The specific implementation method is as follows: the three-level bin 400 is divided by the top surface of the bin body, the inclined partition 3 and two vertical plates to form a three-level side bin 401, a three-level connecting bin 402, and a three-level middle bin 403. A second-level rising bin 304 is opened on the top of the second-level middle bin 303. The second-level rising bin 304 is connected with the third-level middle bin 403. Both ends of the horizontal pipe 21 extend to the interior of the three-level side bin 401. The circumferential surface of the horizontal pipe 21 is provided with an annularly distributed through hole 22. The through hole 22 is located below the exhaust pipe 2, and the first-level rising port 201 is located directly above the second-level rising bin 304.

[0040] The mixed gas enters the secondary middle warehouse 303 and moves from low to high. The mixed gas enters the tertiary middle warehouse 403 through the secondary rising warehouse 304. The mixed gas needs to stick to the top surface of the tertiary middle warehouse 403 and continue to move until the mixed gas passes through the tertiary connecting warehouse 402 and enters the tertiary side warehouse 401. After the mixed gas passes through the tertiary side warehouse 401 and enters the cross pipe 21, the mixed gas is discharged through the exhaust pipe 2. During this process, the condensate produced still flows downward through the inclined tertiary side warehouse 401, the tertiary connecting warehouse 402, and the bottom surface of the tertiary middle warehouse 403. During this process, the mixed gas and the condensate still produce a vertical position difference, avoiding the increase of the humidity of the mixed gas caused by the contact between the liquid and the mixed gas. The through hole 22 allows the mixed gas to rise through the secondary rising warehouse 304, and a small amount of mixed gas can enter the exhaust pipe 2 through the through hole 22 for discharge. When the condensate produced in the exhaust pipe 2 drops, it can also be discharged to the bottom through the through hole 22.

[0041] Supplementary Note: Horizontal tube 21 is located above secondary riser 304, and exhaust connecting tube 1 vertically penetrates the junction of tertiary intermediate chamber 403 and tertiary connecting chamber 402. As the mixed gas rises through horizontal tube 21, if the mixed gas velocity is high, turbulence will occur behind horizontal tube 21. Similarly, after the mixed gas flowing in tertiary intermediate chamber 403 passes through the cylindrical surface of exhaust connecting tube 1, turbulence will also occur behind the cylindrical surface of exhaust connecting tube 1, further improving the flue gas retention effect.

[0042] In order to prevent the flue gas from rising directly through the condensate drain 4, the following improvements are made:

[0043] The improvements are as follows: Condensation drainers 4 are provided at the two corners of the bottom end of the inclined partition 3. The condensation drainer 4 includes an inclined mouth 41 and an inclined trapezoidal plate 42. The inclined trapezoidal plate 42 is fixedly connected to the bottom of the inclined mouth 41. The short side of the inclined trapezoidal plate 42 forms a triangular falling channel with the warehouse body.

[0044] Principle: The corner of the inclined partition 3 is provided with an oblique opening 41, the long side of the inclined trapezoidal plate 42 is in contact with the oblique opening 41, the inclined trapezoidal plate 42 is tilted downward, and the inclined trapezoidal plate 42 is welded to the oblique opening 41. The corner of the silo is a right angle, and the short side of the inclined trapezoidal plate 42 forms a triangle with the corner of the silo. Figure 4 The mixed gas can only rise vertically through the triangular area, while the mixed gas that deviates from the triangular area will only be guided to the surface of the inclined partition 3 by the inclined trapezoidal plate 42. Similarly, the mixed gas that enters the secondary side chamber 301 through the primary ascending port 201 moves downward along the top surface of the secondary side chamber 301 to the secondary connecting chamber 302, and then flows into the secondary connecting chamber 302 and the secondary middle chamber 303. If the mixed gas continues to move downward, it will be further hindered by the inclined trapezoidal plate 42.

[0045] The above is only a preferred specific embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any technician familiar with this technical field, within the technical scope disclosed by the present invention, who makes equivalent replacements or changes based on the technical solutions and inventive concepts of the present invention, should be covered by the scope of protection of the present invention.

Claims

1. An engine exhaust treatment device, comprising a chamber, wherein a liquid filter chamber (100), an exhaust connecting pipe (1), and an exhaust pipe (2) are provided in the chamber, wherein the bottom of the exhaust connecting pipe (1) is fixedly connected to the particle filter in the liquid filter chamber (100), and the exhaust pipe (2) is provided at the top of the chamber, characterized in that: The invention also includes a first-stage chamber (200), a second-stage chamber (300), and a third-stage chamber (400) vertically arranged above the liquid filtration chamber (100) from bottom to top, wherein the cavity shapes of the second-stage chamber (300) and the third-stage chamber (400) are inclined in the shape of a "mountain", the first-stage chamber (200) is connected to the two side chambers of the second-stage chamber (300), and the second-stage chamber (300) is connected to the middle chamber of the third-stage chamber (400), and a horizontal pipe (21) is provided at the bottom of the exhaust pipe (2), and the horizontal pipe (21) is respectively connected to the side chamber and the middle chamber of the third-stage chamber (400).

2. The engine exhaust treatment device according to claim 1, characterized in that: The first-level warehouse (200) is formed by dividing the warehouse body by an inclined partition (3) and a partition, and the second-level warehouse (300) is divided by two of the inclined partitions (3). The two inclined partitions (3) are closed by a vertical plate to divide the second-level warehouse (300) into a second-level side warehouse (301), a second-level connecting warehouse (302) and a second-level middle warehouse (303) that are interconnected.

3. The engine exhaust treatment device according to claim 2, characterized in that: The first-level bin (200) and the two second-level side bins (301) are both connected via a first-level ascending port (201).

4. The engine exhaust treatment device according to claim 3, characterized in that: The liquid filtration chamber (100) and the primary chamber (200) are sealed by a partition, and a pore area is provided on the partition, and the pore area is located on a side away from the primary riser (201).

5. The engine exhaust treatment device according to claim 3, characterized in that: The three-level warehouse (400) is divided by the top surface of the warehouse body, the inclined partition (3) and two vertical plates to form a three-level side warehouse (401), a three-level connecting warehouse (402) and a three-level middle warehouse (403). The top of the second-level middle warehouse (303) is provided with a second-level rising warehouse (304), and the second-level rising warehouse (304) is connected to the third-level middle warehouse (403).

6. The engine exhaust treatment device according to claim 5, characterized in that: Both ends of the transverse tube (21) extend to the interior of the third-stage side bin (401), and the circumferential surface of the transverse tube (21) is provided with annularly distributed through holes (22), and the through holes (22) are located below the exhaust pipe (2), and the first-stage rising port (201) is located directly above the second-stage rising bin (304).

7. The engine exhaust treatment device according to claim 2, characterized in that: The inclined partition (3) is fixed obliquely on the inner wall of the bin body.

8. The engine exhaust treatment device according to claim 2, characterized in that: Condensate drainers (4) are provided at the two corners at the bottom end of the inclined partition (3), and the condensation drainer (4) includes an inclined opening (41) and an inclined trapezoidal plate (42). The inclined trapezoidal plate (42) is fixedly connected below the inclined opening (41), and the short side of the inclined trapezoidal plate (42) forms a triangular falling channel with the warehouse body.

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