CN210799099U - Spiral diesel engine tail gas purification device - Google Patents
Spiral diesel engine tail gas purification device Download PDFInfo
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- CN210799099U CN210799099U CN201921642359.3U CN201921642359U CN210799099U CN 210799099 U CN210799099 U CN 210799099U CN 201921642359 U CN201921642359 U CN 201921642359U CN 210799099 U CN210799099 U CN 210799099U
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Abstract
The utility model discloses a spiral diesel engine tail gas purification device; comprises an outer cylinder, a middle cylinder and an inner cylinder; the combined gas and water supply device forms a spiral gas purification cavity and a water supply cavity, and a water film layer is formed on the wall surface of the water supply cavity; the tail gas of the diesel engine is introduced into the upper part of the flue gas purification cavity through a tail gas inlet formed in the upper end plate; leading the introduced tail gas to spirally advance in the spiral flue gas purification cavity under the flow guiding action of the spiral flow guide sheet; in the spiral advancing process, particulate matters carried in the tail gas are captured by a water film layer on the wall surface of the middle cylinder under the action of inertial centrifugal force, so that the particulate matters are separated from the gas, the separated particulate matters are collected into the water collecting bin along with liquid flow under the action of air flow and gravity, the separated particulate matters are discharged out of the water collecting bin through the blow-off pipe after the water level of the water collecting bin reaches a preset height, and the purified gas is discharged to the atmosphere from the inner cylinder.
Description
Technical Field
The utility model relates to a diesel engine tail gas cleanup unit especially relates to a spiral diesel engine tail gas cleanup unit.
Background
In recent years, with the rapid development of economy and technology, automobiles have become one of the main ways of people going out, and the global automobile yield and conservation quantity are increasing year by year. The great use of automobiles promotes the development of modern industry and economy and causes serious environmental pollution, which becomes one of the main directions of environmental protection research at present. At present, the mainstream vehicle engines are gasoline engines and diesel engines, and the gasoline engines have smaller volume and mass and higher power per liter and are suitable for various small vehicles. The diesel engine is more and more emphasized by people due to good dynamic property, economy and durability, and is generally used in various large buses, trucks and various engineering machines.
The main emissions of the diesel engine include carbon monoxide (CO), Hydrocarbons (HC), nitrogen oxides (NOx) and Particulate Matters (PM), wherein the carbon monoxide (CO) is inhaled by a human body and then is combined with hemoglobin in the human body, so that the transportation of oxygen by blood is blocked, the human body is lack of oxygen, symptoms such as dizziness, nausea and the like are caused, and coma and even death can be caused in severe cases. Organic substances such as benzene (C6H6) in Hydrocarbon (HC) have strong carcinogenic effects, and the incidence of cancer is greatly increased. Nitrogen oxides (NOx) enter the atmosphere and react with other substances in the atmosphere under the action of sunlight to form photochemical smog and acid rain, which cause great harm and pollution to human health and the environment. Particulate Matter (PM) not only directly affects the health of the human respiratory system, but also adsorbs a large amount of soluble organic matter, many of which have strong carcinogenic effects.
Among the above-mentioned main emissions, the diesel engine has significantly lower emission levels of carbon monoxide (CO) and Hydrocarbons (HC) than the gasoline engine because of the higher air excess factor and more oxygen involved in the combustion process. However, in terms of Particulate Matter (PM) control, emissions are much higher than those of gasoline engines due to the limitations of diesel combustion mode and fuel properties.
Therefore, the research on the purification technology of the particles outside the diesel engine has great theoretical and practical significance in the aspects of protecting the environment and the human health.
Disclosure of Invention
In order to overcome the defects and deficiencies of the prior art, the utility model provides a spiral diesel engine tail gas purification device.
The utility model discloses a following technical scheme realizes:
a spiral diesel engine tail gas purification device comprises an outer cylinder 1, a middle cylinder 2 and an inner cylinder 3 which are sequentially sleeved together at intervals;
the upper end edges of the outer cylinder 1, the middle cylinder 2 and the inner cylinder 3 are hermetically connected through an upper end plate 31;
the lower end edges of the outer cylinder 1 and the middle cylinder 2 are hermetically connected through a lower end plate 32;
the lower port of the inner cylinder 3 is directly communicated with a water collecting bin 4 arranged below the lower end plate 32;
a spiral flow deflector 5 is arranged on the outer circumferential wall surface along the axial direction of the inner cylinder 3; the spiral flow deflector 5 is positioned in a gap formed between the inner cylinder 3 and the middle cylinder 2, and the gap forms a spiral flue gas purification cavity;
a gap between the middle cylinder 2 and the outer cylinder 1 forms a water supply cavity 6, the wall surface of the middle cylinder 2 is fully distributed with water outlet holes 12, water in the water supply cavity 6 seeps out of the water outlet holes 12 under the action of pressure and wets the wall surface of the middle cylinder 2, and a water film layer is formed on the whole wall surface of the middle cylinder 2;
the lower part of the flue gas purification cavity is communicated with the water collecting bin 4 through a through hole on the lower end plate 32;
the upper part of the flue gas purification cavity introduces the tail gas of the diesel engine through a tail gas inlet 7 arranged on the upper end plate 31; leading the introduced tail gas to spirally advance in the spiral flue gas purification cavity under the flow guiding action of the spiral flow guiding sheet 5; in the spiral advancing process, particulate matters carried in the tail gas are captured by a water film layer on the wall surface of the middle cylinder 2 under the action of inertial centrifugal force, so that the particulate matters are separated from the gas, the separated particulate matters are collected into the water collecting bin 4 along with liquid flow under the action of air flow and gravity, the separated particulate matters are discharged out of the water collecting bin 4 through the drain pipe 8 when the water level of the water collecting bin 4 reaches a preset height, and the purified gas is discharged to the atmosphere through the inner cylinder 3.
The diameters of the water outlet holes 12 are equal, and the arrangement density is gradually sparse from top to bottom.
The aperture of the water outlet hole 12 is gradually reduced from top to bottom.
A tail gas guide cover 9 is arranged on the tail gas inlet 7 of the upper end plate 31, and a tail gas inlet pipe 10 is arranged on the tail gas guide cover 9.
The tail gas inlet pipe 10 is arranged on the side part of the tail gas guide sleeve 9.
The upper side wall of the outer barrel 1 is provided with a water inlet pipe 11, and the water inlet pipe 11 is communicated with the water supply cavity 6.
An exhaust pipe 13 is installed on the inner cylinder 3.
A drain pipe 8 is arranged on the side wall of the water collecting bin 4; the diameter of the sewage discharge pipe 8 is one fourth, one sixth, one tenth or one twentieth of the diameter of the inner cylinder 3; the number of the sewage discharge pipes 8 is one or more than two.
When in work: a water inlet pipe 11 on the side wall of the outer cylinder 1 is connected into a water supply pump, water from the water supply pump is filled in a water supply cavity 6 and seeps out to a spiral flue gas purification cavity from a water outlet hole 12 on the wall surface of the middle cylinder 2 under the action of pressure, and the seeped water forms a downward flowing water film layer on the inner circumferential wall surface of the middle cylinder 2 and finally is collected to the water collecting bin 4 through a through hole on a lower end plate 32;
then, the exhaust pipe of the diesel engine is connected into the exhaust gas inlet pipe 10, and the exhaust enters the spiral flue gas purification cavity through the exhaust gas inlet 7 formed in the upper end plate 31; under the flow guiding action of the spiral flow guiding sheet 5, the tail gas spirally advances in the spiral flue gas purification cavity in a spiral mode; in the spiral advancing process, particulate matters carried in the tail gas are contacted and captured by a water film layer on the wall surface of the middle cylinder 2 under the action of inertial centrifugal force, so that the particulate matters are separated from gas, the separated particulate matters are converged into the water collecting bin 4 along with liquid flow under the action of gas flow and gravity, and the particulate matters are discharged out of the water collecting bin 4 through a discharge pipe 8 when the water level of the water collecting bin 4 reaches a preset height; meanwhile, the separated gas enters the water collecting bin 4 from a through hole at the bottom of the spiral flue gas purification cavity, and the particulate matters remaining in the gas entering the water collecting bin 4 are contacted and collided with the liquid level in the water collecting bin 4 again to form secondary capture, so that the gas is purified again; the gas purified again is returned to the inner cylinder 3 and then exhausted to the atmosphere through an exhaust pipe 13 connected to the inner cylinder 3; and the sewage mixed with the particulate matters is continuously collected to the water collecting bin 4, and is discharged out of the water collecting bin 4 by the blow-off pipe 8 after the water level in the water collecting bin 4 reaches a preset height.
Compared with the prior art, the utility model, following advantage and effect have:
the utility model organically combines the outer cylinder 1, the middle cylinder 2 and the inner cylinder 3 together, and the spiral flow deflector 5 is arranged on the outer circumferential wall surface along the axial direction of the inner cylinder 3; the spiral flow deflector 5 is positioned in a gap formed between the inner cylinder 3 and the middle cylinder 2, and the gap forms a spiral flue gas purification cavity; the gap between the middle cylinder 2 and the outer cylinder 1 forms a water supply cavity 6, the wall surface of the middle cylinder 2 is full of water outlet holes 12, water in the water supply cavity 6 seeps out of the water outlet holes 12 under the action of pressure and wets the wall surface of the middle cylinder 2, and a water film layer is formed on the whole wall surface of the middle cylinder 2.
By adopting the structure combination, the introduced tail gas advances spirally in the spiral flue gas purification cavity in a spiral manner under the flow guiding action of the spiral flow guiding sheet 5; in the spiral advancing process, particulate matters carried in the tail gas are contacted and captured by a water film layer on the wall surface of the middle cylinder 2 under the action of inertial centrifugal force, so that the particulate matters are separated from gas, the separated particulate matters are converged into the water collecting bin 4 along with liquid flow under the action of gas flow and gravity, and the particulate matters are discharged out of the water collecting bin 4 through a discharge pipe 8 when the water level of the water collecting bin 4 reaches a preset height; meanwhile, the separated gas enters the water collecting bin 4 from a through hole at the bottom of the spiral flue gas purification cavity, and the particulate matters remaining in the gas entering the water collecting bin 4 are contacted and collided with the liquid level in the water collecting bin 4 again to form secondary capture, so that the gas is purified again; the gas purified again is returned to the inner cylinder 3 and then exhausted to the atmosphere through an exhaust pipe 13 connected to the inner cylinder 3; and the sewage mixed with the particulate matters is continuously collected to the water collecting bin 4, and is discharged out of the water collecting bin 4 by the blow-off pipe 8 after the water level in the water collecting bin 4 reaches a preset height.
Compare traditional whirlwind formula particulate matter separator, the utility model discloses not only the structure principle is simpler, has better separation effect to the particulate matter that mingles with in the tail gas moreover.
The wall surface of the middle cylinder of the device has the practical function that water seeps out of the water outlet holes through the water outlet holes distributed in an array manner, and the wall surface of the middle cylinder 2 is finally moistened to form a water film layer; the arrangement density of the water outlet holes adopts an arrangement mode that the water outlet holes are gradually sparse from top to bottom or the diameters of the water outlet holes are gradually reduced from top to bottom. The arrangement mode skillfully utilizes the fluid mechanics principle. The utility model discloses a density of arranging size and the proportional principle of flow of aperture and hole under the same pressure, make the wall distribution of water film layer at a whole well section of thick bamboo more even, stable.
The device generally uses water to adsorb particulate matter in the exhaust gas, and according to the principle of Selective Catalytic Reduction (SCR) technology, a liquid containing a certain amount of a reducing agent such as urea can also be used. In the flowing process of the tail gas, the relevant harmful gas can also be contacted with the adsorption liquid to remove harmful gas such as nitrogen oxide (NOx) in the tail gas, thereby realizing multiple-effect utilization.
The outer cylinder, the middle cylinder, the inner cylinder, the upper and lower end plates, the tail gas guide cover and the water collecting bin of the device can be manufactured into a split structure in a flange connection mode, and maintenance is convenient.
The diesel engine tail gas processing system generally comprises a plurality of purifier at present, and this device mainly filters the particulate matter in the tail gas and purifies, can make up with other processing apparatus, constitutes complete diesel engine tail gas processing system.
Drawings
Fig. 1 is the structure schematic diagram of the spiral diesel engine tail gas purification device of the utility model.
Fig. 2 is a schematic diagram of the flow trajectory of the tail gas in the spiral flue gas cleaning cavity.
Fig. 3 is a schematic diagram showing the array distribution of water outlet holes on the wall surface of the middle cylinder.
Fig. 4 is a schematic diagram showing the array distribution of water outlet holes on the wall surface of the middle cylinder.
Detailed Description
The present invention will be described in further detail with reference to specific embodiments.
Examples
As shown in fig. 1-4. The utility model discloses a spiral diesel engine tail gas purification device, which comprises an outer barrel 1, a middle barrel 2 and an inner barrel 3 which are sleeved together in sequence at intervals;
the upper end edges of the outer cylinder 1, the middle cylinder 2 and the inner cylinder 3 are hermetically connected through an upper end plate 31;
the lower end edges of the outer cylinder 1 and the middle cylinder 2 are hermetically connected through a lower end plate 32;
the lower port of the inner cylinder 3 is directly communicated with a water collecting bin 4 arranged below the lower end plate 32;
a spiral flow deflector 5 is arranged on the outer circumferential wall surface along the axial direction of the inner cylinder 3; the spiral flow deflector 5 is positioned in a gap formed between the inner cylinder 3 and the middle cylinder 2, and the gap forms a spiral flue gas purification cavity;
a gap between the middle cylinder 2 and the outer cylinder 1 forms a water supply cavity 6, the wall surface of the middle cylinder 2 is fully distributed with water outlet holes 12, water in the water supply cavity 6 seeps out of the water outlet holes 12 under the action of pressure and wets the wall surface of the middle cylinder 2, and a water film layer is formed on the whole wall surface of the middle cylinder 2;
the lower part of the flue gas purification cavity is communicated with the water collecting bin 4 through a through hole on the lower end plate 32;
the upper part of the flue gas purification cavity introduces the tail gas of the diesel engine through a tail gas inlet 7 arranged on the upper end plate 31; leading the introduced tail gas to spirally advance in the spiral flue gas purification cavity under the flow guiding action of the spiral flow guiding sheet 5; in the spiral advancing process, particulate matters carried in the tail gas are captured by a water film layer on the wall surface of the middle cylinder 2 under the action of inertial centrifugal force, so that the particulate matters are separated from the gas, the separated particulate matters are collected into the water collecting bin 4 along with liquid flow under the action of air flow and gravity, the separated particulate matters are discharged out of the water collecting bin 4 through the drain pipe 8 when the water level of the water collecting bin 4 reaches a preset height, and the purified gas is discharged to the atmosphere through the inner cylinder 3.
The diameters of the water outlet holes 12 are equal, and the arrangement density is gradually sparse from top to bottom. The aperture of the water outlet hole 12 is gradually reduced from top to bottom. According to the fluid mechanics principle, under the condition that the diameters of the water outlet holes on the wall surface of the middle cylinder 2 are equal, the smaller the diameter of the water outlet hole positioned below the water outlet hole is, the greater the pressure intensity is, and the greater the flow rate is. The upper and lower water outlet is more uniform.
A tail gas guide cover 9 is arranged on the tail gas inlet 7 of the upper end plate 31, and a tail gas inlet pipe 10 is arranged on the tail gas guide cover 9.
The tail gas inlet pipe 10 is arranged on the side part of the tail gas guide sleeve 9.
The upper side wall of the outer barrel 1 is provided with a water inlet pipe 11, and the water inlet pipe 11 is communicated with the water supply cavity 6.
An exhaust pipe 13 is installed on the inner cylinder 3. The diameter of the exhaust pipe 13 can be equal to that of the inner barrel 3; it is also possible in practice for the diameter of the exhaust pipe 13 to be smaller than, for example, one half or one third of the diameter of the inner cylinder 3.
A drain pipe 8 is arranged on the side wall of the water collecting bin 4; the diameter of the sewage discharge pipe 8 is one fourth, one sixth, one tenth or one twentieth of the diameter of the inner cylinder 3; the number of the sewage discharge pipes 8 is one or more than two. The above description is merely exemplary, and in practical applications, the above description may be specific.
The outer cylinder 1, the middle cylinder 2 and the inner cylinder 3 are generally metal circular cylinder structures. The utility model discloses spiral water conservancy diversion piece 5 adopts and is connected with 3 welded modes of inner tube, spiral water conservancy diversion piece 5 the outward flange with well section of thick bamboo 2 the wall contact can, need not fixed connection to convenient the dismantlement.
The size of the gap between the outer cylinder 1 and the middle cylinder 2 can be flexibly changed according to the volume required by the water supply cavity 6; the size of the gap (spiral flue gas purification cavity) between the middle cylinder 2 and the inner cylinder 3 can be determined according to the discharge capacity of the diesel engine.
The utility model discloses diesel engine tail gas clean-up process as follows:
a water inlet pipe 11 on the side wall of the outer cylinder 1 is connected into a water supply pump, water from the water supply pump is filled in a water supply cavity 6 and seeps out to a spiral flue gas purification cavity from a water outlet hole 12 on the wall surface of the middle cylinder 2 under the action of pressure, and the seeped water forms a downward flowing water film layer on the inner circumferential wall surface of the middle cylinder 2 and finally is collected to the water collecting bin 4 through a through hole on a lower end plate 32;
then, the exhaust pipe of the diesel engine is connected into the exhaust gas inlet pipe 10, and the exhaust enters the spiral flue gas purification cavity through the exhaust gas inlet 7 formed in the upper end plate 31; under the flow guiding action of the spiral flow guiding sheet 5, the tail gas spirally advances in the spiral flue gas purification cavity in a spiral mode; in the spiral advancing process, particulate matters carried in the tail gas are contacted and captured by a water film layer on the wall surface of the middle cylinder 2 under the action of inertial centrifugal force, so that the particulate matters are separated from gas, the separated particulate matters are converged into the water collecting bin 4 along with liquid flow under the action of gas flow and gravity, and the particulate matters are discharged out of the water collecting bin 4 through a discharge pipe 8 when the water level of the water collecting bin 4 reaches a preset height; meanwhile, the separated gas enters the water collecting bin 4 from a through hole at the bottom of the spiral flue gas purification cavity, and the particulate matters remaining in the gas entering the water collecting bin 4 are contacted and collided with the liquid level in the water collecting bin 4 again to form secondary capture, so that the gas is purified again; the gas purified again is returned to the inner cylinder 3 and then exhausted to the atmosphere through an exhaust pipe 13 connected to the inner cylinder 3; and the sewage mixed with the particulate matters is continuously collected to the water collecting bin 4, and is discharged out of the water collecting bin 4 by the blow-off pipe 8 after the water level in the water collecting bin 4 reaches a preset height.
As described above, the present invention can be preferably realized.
The embodiments of the present invention are not limited by the above-mentioned embodiments, and any other changes, modifications, substitutions, combinations, and simplifications which do not depart from the spirit and principle of the present invention should be equivalent replacement modes, and all are included in the scope of the present invention.
Claims (8)
1. The utility model provides a spiral diesel engine tail gas cleanup unit which characterized in that: comprises an outer cylinder (1), a middle cylinder (2) and an inner cylinder (3) which are sleeved together at intervals in sequence;
the upper end edges of the outer cylinder (1), the middle cylinder (2) and the inner cylinder (3) are hermetically connected through an upper end plate (31);
the lower end edges of the outer cylinder (1) and the middle cylinder (2) are hermetically connected through a lower end plate (32);
the lower port of the inner cylinder (3) is directly communicated with a water collecting bin (4) arranged below the lower end plate (32);
a spiral flow deflector (5) is arranged on the outer circumferential wall surface along the axial direction of the inner cylinder (3); the spiral flow deflector (5) is positioned in a gap formed between the inner cylinder (3) and the middle cylinder (2), and the gap forms a spiral flue gas purification cavity;
a water supply cavity (6) is formed by a gap between the middle cylinder (2) and the outer cylinder (1), water outlet holes (12) are fully distributed on the wall surface of the middle cylinder (2), water in the water supply cavity (6) seeps out of the water outlet holes (12) under the action of pressure and wets the wall surface of the middle cylinder (2), and a water film layer is formed on the whole wall surface of the middle cylinder (2);
the lower part of the flue gas purification cavity is communicated with the water collecting bin (4) through a through hole on the lower end plate (32);
the upper part of the flue gas purification cavity introduces the tail gas of the diesel engine through a tail gas inlet (7) arranged on an upper end plate (31); leading the introduced tail gas to spirally advance in the spiral flue gas purification cavity under the flow guiding action of the spiral flow guiding sheet (5); in the spiral advancing process, particulate matters carried in the tail gas are captured by a water film layer on the wall surface of the middle cylinder (2) under the action of inertial centrifugal force, so that the particulate matters are separated from the gas, the separated particulate matters are collected into the water collecting bin (4) along with liquid flow under the action of air flow and gravity, the water collecting bin (4) is discharged out of the water collecting bin (4) through the blow-off pipe (8) after the water level of the water collecting bin (4) reaches a preset height, and the purified gas is discharged to the atmosphere through the inner cylinder (3).
2. The spiral diesel engine exhaust purification device according to claim 1, characterized in that: the diameters of the water outlet holes (12) are equal, and the arrangement density is gradually sparse from top to bottom.
3. The spiral diesel engine exhaust purification device according to claim 1, characterized in that: the aperture of the water outlet hole (12) is gradually reduced from top to bottom.
4. The spiral diesel engine exhaust purification device according to claim 2, characterized in that: a tail gas guide sleeve (9) is arranged on a tail gas inlet (7) of the upper end plate (31), and a tail gas inlet pipe (10) is arranged on the tail gas guide sleeve (9).
5. The spiral diesel engine exhaust purification device according to claim 4, characterized in that: the tail gas inlet pipe (10) is arranged on the side part of the tail gas guide sleeve (9).
6. The spiral diesel engine exhaust purification device according to claim 5, characterized in that: the upper side wall of the outer barrel (1) is provided with a water inlet pipe (11), and the water inlet pipe (11) is communicated with the water supply cavity (6).
7. The spiral diesel engine exhaust purification device according to claim 6, characterized in that: an exhaust pipe (13) is arranged on the inner cylinder (3).
8. A spiral diesel engine exhaust purification device according to any one of claims 1 to 7, characterized in that: a drain pipe (8) is arranged on the side wall of the water collecting bin (4); the diameter of the sewage discharge pipe (8) is one fourth, one sixth, one tenth or one twentieth of the diameter of the inner cylinder (3); the number of the sewage discharge pipes (8) is one or more than two.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921642359.3U CN210799099U (en) | 2019-09-29 | 2019-09-29 | Spiral diesel engine tail gas purification device |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921642359.3U CN210799099U (en) | 2019-09-29 | 2019-09-29 | Spiral diesel engine tail gas purification device |
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| CN210799099U true CN210799099U (en) | 2020-06-19 |
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| CN201921642359.3U Active CN210799099U (en) | 2019-09-29 | 2019-09-29 | Spiral diesel engine tail gas purification device |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110541743A (en) * | 2019-09-29 | 2019-12-06 | 华南理工大学 | Spiral diesel engine tail gas purification device and purification method thereof |
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2019
- 2019-09-29 CN CN201921642359.3U patent/CN210799099U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110541743A (en) * | 2019-09-29 | 2019-12-06 | 华南理工大学 | Spiral diesel engine tail gas purification device and purification method thereof |
| CN110541743B (en) * | 2019-09-29 | 2024-02-27 | 华南理工大学 | Spiral diesel engine tail gas purifying device and purifying method thereof |
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