CN111577437A - Diesel engine tail gas emission reduction system - Google Patents
Diesel engine tail gas emission reduction system Download PDFInfo
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- CN111577437A CN111577437A CN202010373799.4A CN202010373799A CN111577437A CN 111577437 A CN111577437 A CN 111577437A CN 202010373799 A CN202010373799 A CN 202010373799A CN 111577437 A CN111577437 A CN 111577437A
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- cylinder
- tail gas
- reaction cylinder
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- filter
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
- F01N13/00—Exhaust or silencing apparatus characterised by constructional features ; Exhaust or silencing apparatus, or parts thereof, having pertinent characteristics not provided for in, or of interest apart from, groups F01N1/00 - F01N5/00, F01N9/00, F01N11/00
- F01N13/009—Exhaust or silencing apparatus characterised by constructional features ; Exhaust or silencing apparatus, or parts thereof, having pertinent characteristics not provided for in, or of interest apart from, groups F01N1/00 - F01N5/00, F01N9/00, F01N11/00 having two or more separate purifying devices arranged in series
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
- F01N13/00—Exhaust or silencing apparatus characterised by constructional features ; Exhaust or silencing apparatus, or parts thereof, having pertinent characteristics not provided for in, or of interest apart from, groups F01N1/00 - F01N5/00, F01N9/00, F01N11/00
- F01N13/009—Exhaust or silencing apparatus characterised by constructional features ; Exhaust or silencing apparatus, or parts thereof, having pertinent characteristics not provided for in, or of interest apart from, groups F01N1/00 - F01N5/00, F01N9/00, F01N11/00 having two or more separate purifying devices arranged in series
- F01N13/0097—Exhaust or silencing apparatus characterised by constructional features ; Exhaust or silencing apparatus, or parts thereof, having pertinent characteristics not provided for in, or of interest apart from, groups F01N1/00 - F01N5/00, F01N9/00, F01N11/00 having two or more separate purifying devices arranged in series the purifying devices are arranged in a single housing
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
- F01N3/00—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust
- F01N3/02—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for cooling, or for removing solid constituents of, exhaust
- F01N3/021—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for cooling, or for removing solid constituents of, exhaust by means of filters
- F01N3/0217—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for cooling, or for removing solid constituents of, exhaust by means of filters the filtering elements having the form of hollow cylindrical bodies
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
- F01N3/00—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust
- F01N3/02—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for cooling, or for removing solid constituents of, exhaust
- F01N3/04—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for cooling, or for removing solid constituents of, exhaust using liquids
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
- F01N3/00—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust
- F01N3/08—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous
- F01N3/0807—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by using absorbents or adsorbents
- F01N3/0821—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by using absorbents or adsorbents combined with particulate filters
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
- F01N3/00—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust
- F01N3/08—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous
- F01N3/0807—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by using absorbents or adsorbents
- F01N3/0828—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by using absorbents or adsorbents characterised by the absorbed or adsorbed substances
- F01N3/0842—Nitrogen oxides
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
- F01N3/00—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust
- F01N3/08—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous
- F01N3/0807—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by using absorbents or adsorbents
- F01N3/0828—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by using absorbents or adsorbents characterised by the absorbed or adsorbed substances
- F01N3/085—Sulfur or sulfur oxides
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
- F01N3/00—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust
- F01N3/08—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous
- F01N3/0807—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by using absorbents or adsorbents
- F01N3/0828—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by using absorbents or adsorbents characterised by the absorbed or adsorbed substances
- F01N3/0857—Carbon oxides
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
- F01N3/00—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust
- F01N3/08—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous
- F01N3/10—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by thermal or catalytic conversion of noxious components of exhaust
- F01N3/24—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by thermal or catalytic conversion of noxious components of exhaust characterised by constructional aspects of converting apparatus
- F01N3/28—Construction of catalytic reactors
- F01N3/2803—Construction of catalytic reactors characterised by structure, by material or by manufacturing of catalyst support
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
- F01N2610/00—Adding substances to exhaust gases
- F01N2610/14—Arrangements for the supply of substances, e.g. conduits
- F01N2610/1406—Storage means for substances, e.g. tanks or reservoirs
Abstract
The invention belongs to the technical field of tail gas treatment, and particularly relates to a diesel engine tail gas emission reduction system which comprises an adsorption reaction cylinder, a liquid supply unit and a secondary reaction cylinder, wherein a filter screen is arranged in a cylinder cavity of the adsorption reaction cylinder and used for dividing the adsorption reaction cylinder into a reaction chamber positioned above and a filter chamber positioned below, a filter cylinder is arranged in the filter chamber and used for filtering particles, and the bottom of the adsorption reaction cylinder is communicated to a tail gas discharge pipe through a one-way valve; the liquid supply unit is communicated with the reaction chamber through a liquid supply pipe, and a liquid level limiting valve is arranged in the reaction chamber and used for controlling the liquid level in the reaction chamber; the secondary reaction cylinder is communicated to the reaction chamber through a connecting pipe, a plurality of concentrically arranged reticular cylinders are arranged in the secondary reaction cylinder, and a metal coating is arranged on the reticular cylinders; according to the invention, the tail gas of the diesel engine is sequentially purified by the adsorption reaction cylinder and the secondary reaction cylinder, so that the content of harmful substances in the tail gas is reduced, and the standard emission of the tail gas is realized.
Description
Technical Field
The invention belongs to the technical field of tail gas treatment, and particularly relates to a diesel engine tail gas emission reduction system.
Background
The diesel engine is an engine which obtains energy release by burning diesel oil, and the working principle of the diesel engine is that the air temperature is improved by adopting a method of compressing air, so that the air temperature exceeds the self-ignition point of the diesel oil, and then the diesel oil is injected, so that the diesel oil is sprayed and mixed with the air and simultaneously ignited and burnt by self, and therefore, the diesel engine does not need an ignition system; meanwhile, the oil supply system of the diesel engine is relatively simple, so that the reliability of the diesel engine is better than that of a gasoline engine. Because of no limit of explosion and requirement of diesel oil self-ignition, the diesel engine has high compression ratio, better thermal efficiency and economy than gasoline engine, and under the condition of same power, the diesel engine has large torque and low rotating speed at maximum power. However, the working pressure of the diesel engine is high, and the related parts are required to have high structural strength and rigidity, so that the existing diesel engine is heavy, the power per liter index is inferior to that of a gasoline engine, the noise and vibration are high, and the emission of soot and particulate matters is serious. The tail gas emitted by the diesel engine contains a large amount of carbon monoxide, hydrocarbon, nitrogen oxide, sulfur dioxide, smoke particles (including certain heavy metal compounds, lead compounds, black smoke and oil mist), odor (formaldehyde and the like), and the gas emission and the smoke particles not only have strange odor, but also are faint and nausea, thus seriously affecting the health of people. Therefore, the tail gas of the diesel engine needs to be purified, in the existing purification process, micro dust particles and black smoke in the tail gas of the diesel engine are always adhered to the tail gas pipe and can also enter the purifier, the purification burden of the purifier is increased, substances such as the micro dust and the black smoke adhered to the tail gas pipe are difficult to clean, the service life of the tail gas pipe is influenced, therefore, the technical personnel in the field are continuously researching and researching, the diesel engine tail gas emission reduction device system is expected to have a good purification effect, and is simple in structure.
Disclosure of Invention
The invention aims to overcome the defects in the prior art, and provides a diesel engine tail gas emission reduction system, which realizes efficient and reliable purification treatment of diesel engine tail gas.
In order to achieve the purpose, the invention adopts the following technical scheme:
a diesel exhaust emission reduction system comprising:
the device comprises an adsorption reaction cylinder, a tail gas discharge pipe, a filter screen, a filter cylinder and a tail gas discharge pipe, wherein the filter screen is arranged in a cylinder cavity of the adsorption reaction cylinder and used for dividing the adsorption reaction cylinder into a reaction chamber positioned above the reaction chamber and a filter chamber positioned below the reaction chamber;
the liquid supply unit is communicated with the inside of the reaction chamber through a liquid supply pipe, and a liquid level limiting valve is arranged in the reaction chamber and used for controlling the liquid level in the reaction chamber;
the secondary reaction cylinder is communicated to the reaction chamber through a connecting pipe, a plurality of concentrically arranged reticular cylinders are arranged in the secondary reaction cylinder, and a metal coating is arranged on the reticular cylinders.
Preferably, the liquid supply unit comprises a liquid storage tank, and the liquid storage tank is arranged at a position higher than the adsorption reaction cylinder.
Under the preferred condition, the reservoir in be equipped with horizontal and vertical staggered arrangement's polylith baffle and be used for with the reservoir separate for a plurality of stock solution chambeies, all be equipped with a through-hole that runs through its body on the baffle that corresponds each stock solution chamber.
Under the preferred condition, the feed pipe vertical arrangement be in the reaction chamber in, and this feed pipe including close on orificial major diameter pipeline section and keep away from orificial minor diameter pipeline section to reach the round platform form pipeline section of passing through from major diameter pipeline section to minor diameter pipeline section, the liquid level limit valve include a floater, the floater setting be in the round platform form pipeline section department of feed pipe, and its diameter is greater than the pipe diameter of minor diameter pipeline section.
Preferably, the filter cartridge is provided with a plurality of filter cartridges concentrically arranged in the filter chamber.
Under the optimal condition, the side part of the secondary reaction cylinder is provided with an exhaust pipe, and the bottom part of the secondary reaction cylinder is provided with a liquid discharge pipe.
Preferably, the metal element in the metal plating layer is at least one selected from platinum, rhodium and palladium.
Compared with the prior art, the invention has the following technical effects:
according to the diesel engine tail gas emission reduction system, the tail gas of the diesel engine is sequentially purified through the adsorption reaction cylinder and the secondary reaction cylinder, so that the content of harmful substances in the tail gas is reduced, and the standard emission of the tail gas is realized; in addition, the exhaust emission reduction system provided by the invention is simple in structure, can be conveniently arranged on a vehicle, and has a good application prospect.
Drawings
FIG. 1 is a schematic diagram of a diesel exhaust emission reduction system provided according to an embodiment of the present invention;
FIG. 2 is a schematic diagram of the diesel exhaust emission reduction system of FIG. 1;
fig. 3 is a schematic structural diagram of a liquid storage tank provided according to an embodiment of the invention;
FIG. 4 is a schematic structural diagram of an adsorption reaction cartridge provided in accordance with an embodiment of the present invention;
FIG. 5 is a schematic structural diagram of a secondary reaction cartridge provided according to an embodiment of the present invention;
the reference numbers in the figures illustrate: 10-adsorption reaction cylinder, 11-filter screen, 12-reaction chamber, 13-filter chamber, 14-filter cylinder, 15-one-way valve, 16-tail gas discharge pipe, 20-reservoir, 201-reservoir chamber, 21-liquid supply pipe, 211-large diameter pipe, 212-small diameter pipe, 213-round table pipe, 22-partition board, 221-through hole, 30-secondary reaction cylinder, 31-connecting pipe, 32-mesh cylinder, 33-exhaust pipe, 34-liquid discharge pipe and 40-floating ball.
Detailed Description
In order to make the technical means, the creation characteristics, the achievement purposes and the effects of the invention easy to understand, the invention is further clarified by combining the specific drawings.
It will be understood that when an element is referred to as being "secured to" another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. The terms "vertical," "horizontal," "left," "right," and the like as used herein are for illustrative purposes only and do not denote a unique embodiment.
Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terminology used herein in the description of the invention is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. As used herein, the term "and/or" includes any and all combinations of one or more of the associated listed items.
As shown in fig. 1, the present invention provides a diesel engine exhaust emission reduction system, which includes an adsorption reaction cylinder 10, a liquid supply unit and a secondary reaction cylinder 30, a filter screen 11 is disposed in a cylinder cavity of the adsorption reaction cylinder 10, the filter screen 11 divides the cylinder cavity of the adsorption reaction cylinder 10 into a reaction chamber 12 located above and a filter chamber 13 located below, a filter cylinder 14 is disposed in the filter chamber 13 for filtering particulate matter, and the bottom of the adsorption reaction cylinder 10 is communicated to an exhaust gas discharge pipe 16 through a check valve 15; the liquid supply unit is communicated to the reaction chamber 12 through a liquid supply pipe 21, and a liquid level limit valve is arranged in the reaction chamber 12 and used for controlling the liquid level in the reaction chamber 12; the secondary reaction cylinder 30 is communicated to the reaction chamber 12 through a connecting pipe 31, a plurality of concentrically arranged reticular cylinders 32 are arranged in the secondary reaction cylinder 30, and metal coatings are arranged on the reticular cylinders 32.
The inventor of the application finds that the tail gas of the diesel engine has complex chemical composition, the tail gas composition is also obviously different along with the working condition change of the diesel engine, the pollutants discharged by the tail gas contain a large amount of carbon black particles, the discharge amount of the carbon black particles is about dozens of times of that of a gasoline engine, and particularly when a cold machine is started and an accelerator is increased, the tail gas emits a large amount of black smoke rich in the carbon black particles, and the black smoke also contains a large amount of hydrocarbons, carbon monoxide and nitrogen oxides, so the tail gas is very pungent and spicy; in addition, the diesel engine exhaust also contains water, oxygen, nitrogen, a small amount of sulfur dioxide and a large amount of carbon dioxide gas.
In combination with the schematic diagram of the diesel engine exhaust emission reduction system shown in fig. 2, due to the action of the liquid level limiting valve, the liquid level in the adsorption reaction cylinder 10 is always higher than the filter screen 11, that is, the whole filter chamber 13 is filled with liquid, and preferably, the liquid supply unit supplies alkaline solution to the adsorption reaction cylinder 10 through the liquid supply pipe 21. In a specific working process, the tail gas of the diesel engine enters the filtering chamber 13 through the tail gas discharge pipe 16, wherein the rich carbon black particles are wetted by the liquid and are filtered by the filtering cylinder 14, and the high-temperature tail gas heats the alkaline solution in the filtering chamber 13 and generates steam which can produce carbon dioxide and hydrogen with carbon monoxide under the action of high temperature; the nitric oxide in the tail gas reacts with oxygen to generate nitrogen dioxide, the nitrogen dioxide further reacts with water to generate nitric acid, and the nitric acid can be neutralized with alkaline solution supplemented by the liquid supply unit; the sulfur dioxide may react with the water to form sulfuric acid, which may be neutralized with an alkaline solution that is replenished by the liquid supply unit. It should be noted that the alkaline solution described in the present invention is used for neutralizing the acid solution generated after the diesel engine exhaust is subjected to the primary treatment, and the kind of the alkaline solution is not particularly limited in the present invention, and specifically, a sodium hydroxide solution, a potassium hydroxide solution, a sodium carbonate solution, and a potassium carbonate solution may be mentioned.
The tail gas after the adsorption treatment of the adsorption reaction cylinder 10 is further conducted to a secondary reaction cylinder 30 through a connecting pipe 31, a net-shaped cylinder 32 is arranged in the secondary reaction cylinder 30, a metal coating is arranged on the net-shaped cylinder 32, and carbon monoxide, nitrogen oxide and hydrocarbon which are not treated in the tail gas of the diesel engine are further converted into harmless gas under the catalysis of the metal coating, so that the standard emission of the tail gas of the diesel engine is realized.
According to the invention, the liquid supply unit is used for providing reaction liquid into the adsorption reaction cylinder 10, and the reaction liquid can cool the high-temperature tail gas on one hand and can react with harmful gas in the tail gas to settle carbon black particles in the tail gas on the other hand; in a specific embodiment of the present invention, the liquid supply unit includes a liquid storage tank 20, and the liquid storage tank 20 is disposed at a position higher than the adsorption reaction cartridge 10. In this way, the reaction liquid in the reservoir 20 can flow into the adsorption reaction cylinder 10 under the action of its own weight.
Further preferably, as shown in fig. 3, in the present invention, a plurality of partition plates 22 arranged in a staggered manner in a horizontal direction and a vertical direction are provided in the reservoir 20 for dividing the reservoir 20 into a plurality of reservoir chambers 201, and a through hole 221 penetrating through a plate body of each reservoir chamber 201 is provided on each partition plate 22 corresponding to the reservoir chamber 201. Through the setting of this structure, can effectually avoid the in-process that the vehicle removed, the reaction liquid that contains in this reservoir 20 takes place to overflow the problem.
In the present invention, as shown in fig. 4, the liquid supply tube 21 is vertically disposed in the reaction chamber 12, and the liquid supply tube 21 includes a large diameter tube section 211 close to the nozzle, a small diameter tube section 212 far from the nozzle, and a truncated cone-shaped tube section 213 transitioning from the large diameter tube section 211 to the small diameter tube section 212, the liquid level limiting valve includes a floating ball 40, and the floating ball 40 is disposed at the truncated cone-shaped tube section 213 of the liquid supply tube 21 and has a diameter larger than a diameter of the small diameter tube section 212. The reaction liquid in the liquid storage tank 20 flows into the adsorption reaction cylinder 10 from the liquid supply pipe 21 under the action of self gravity, when the liquid level gradually rises, the generated buoyancy enables the floating ball 40 to block the small-diameter pipe section 212 of the liquid supply pipe 21, and when the reaction liquid in the adsorption reaction cylinder 10 is lost in the tail gas purification treatment process, the liquid level is reduced, the floating ball 40 falls down, and the reaction liquid in the liquid storage tank 20 continues to flow down. That is, the liquid level limit valve can ensure that the liquid level in the adsorption reaction cylinder 10 is maintained at a certain height.
In the present invention, the filter cartridge 14 is provided in plural and concentrically arranged in the filter chamber 13. The cylinder diameters of the filter cylinders 14 are sequentially increased and concentrically sleeved together to form a plurality of annular isolation chambers which are adjacently arranged; a through hole is formed in the wall of the filter cartridge 14; through the arrangement of the structure, the high-temperature tail gas guided by the tail gas discharge pipe 16 is buffered in the filter cylinder 14, so that the bubbling is not too fast, and the full contact between the tail gas of the diesel engine and the reaction liquid is ensured.
In the present invention, as shown in fig. 5, a gas exhaust pipe 33 is provided at a side portion of the secondary reaction cylinder 30, and a liquid exhaust pipe 34 is provided at a bottom portion thereof. The exhaust pipe 33 provided at the side of the secondary reaction cylinder 30 discharges the off-gas and the drain pipe 34 at the bottom discharges the water generated by condensation.
In the present invention, the metal element in the metal plating layer is at least one selected from platinum, rhodium and palladium. Harmful gases in tail gas are further converted into harmless gases through the catalytic action of metal elements in the metal coating, so that standard emission is realized.
The foregoing shows and describes the general principles, essential features, and inventive features of this invention. It will be understood by those skilled in the art that the present invention is not limited to the embodiments described above, which are described in the specification and illustrated only to illustrate the principle of the present invention, but that various changes and modifications may be made therein without departing from the spirit and scope of the present invention, which fall within the scope of the invention as claimed. The scope of the invention is defined by the appended claims and equivalents thereof.
Claims (7)
1. A diesel exhaust emission reduction system, comprising:
the device comprises an adsorption reaction cylinder (10), wherein a filter screen (11) is arranged in a cylinder cavity of the adsorption reaction cylinder and used for dividing the adsorption reaction cylinder into a reaction chamber (12) positioned above and a filter chamber (13) positioned below, a filter cylinder (14) is arranged in the filter chamber (13) and used for filtering particles, and the bottom of the adsorption reaction cylinder (10) is communicated to a tail gas discharge pipe (16) through a one-way valve (15);
the liquid supply unit is communicated with the inside of the reaction chamber (12) through a liquid supply pipe (21), and a liquid level limiting valve is arranged in the reaction chamber (12) and used for controlling the liquid level in the reaction chamber (12);
the secondary reaction cylinder (30) is communicated to the reaction chamber (12) through a connecting pipe (31), a plurality of concentrically arranged reticular cylinders (32) are arranged in the secondary reaction cylinder (30), and metal coatings are arranged on the reticular cylinders (32).
2. The diesel exhaust emission reduction system according to claim 1, wherein the liquid supply unit comprises a liquid storage tank (20), and the liquid storage tank (20) is arranged at a position higher than the adsorption reaction cylinder (10).
3. The diesel engine exhaust emission reduction system according to claim 2, wherein a plurality of partition plates (22) which are arranged in a staggered manner in a transverse and longitudinal direction are arranged in the liquid storage tank (20) and used for dividing the liquid storage tank (20) into a plurality of liquid storage cavities (201), and a through hole (221) penetrating through the plate body is formed in each partition plate (22) corresponding to each liquid storage cavity (201).
4. The diesel exhaust emission reduction system according to claim 1, wherein the liquid supply pipe (21) is vertically disposed in the reaction chamber (12), and the liquid supply pipe (21) includes a large diameter pipe section (211) adjacent to the nozzle, a small diameter pipe section (212) away from the nozzle, and a truncated cone-shaped pipe section (213) transitioning from the large diameter pipe section (211) to the small diameter pipe section (212), the liquid level limiting valve includes a floating ball (40), and the floating ball (40) is disposed at the truncated cone-shaped pipe section (213) of the liquid supply pipe (21) and has a diameter greater than a pipe diameter of the small diameter pipe section (212).
5. A system as claimed in claim 1, characterized in that said filter cartridge (14) is provided with a plurality of filter cartridges (13) arranged concentrically inside said filter chamber.
6. The diesel exhaust emission reduction system according to claim 1, wherein the secondary reaction cylinder (30) is provided with an exhaust pipe (33) at the side part and a drain pipe (34) at the bottom part.
7. The diesel exhaust emission reduction system of claim 1, wherein the metal element in the metal coating is at least one selected from the group consisting of platinum, rhodium, and palladium.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010373799.4A CN111577437A (en) | 2020-05-06 | 2020-05-06 | Diesel engine tail gas emission reduction system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010373799.4A CN111577437A (en) | 2020-05-06 | 2020-05-06 | Diesel engine tail gas emission reduction system |
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| Publication Number | Publication Date |
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| CN111577437A true CN111577437A (en) | 2020-08-25 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202010373799.4A Pending CN111577437A (en) | 2020-05-06 | 2020-05-06 | Diesel engine tail gas emission reduction system |
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| CN109915286A (en) * | 2019-04-23 | 2019-06-21 | 江苏博润通科技有限公司 | Circulation fluid reservoir is swung in automobile-used oxyhydrogen generator suppression |
| CN111346511A (en) * | 2018-12-24 | 2020-06-30 | 西安聚科创通环保科技有限公司 | Environment-friendly tail gas discharge pipe |
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Application publication date: 20200825 |