CN1896467A - Method and regenerator for discharging microgranular filter by oxy-acid fuel catalytic combustion regenerative diesel engine - Google Patents
Method and regenerator for discharging microgranular filter by oxy-acid fuel catalytic combustion regenerative diesel engine Download PDFInfo
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- CN1896467A CN1896467A CN 200510014452 CN200510014452A CN1896467A CN 1896467 A CN1896467 A CN 1896467A CN 200510014452 CN200510014452 CN 200510014452 CN 200510014452 A CN200510014452 A CN 200510014452A CN 1896467 A CN1896467 A CN 1896467A
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Abstract
This is a kind of diesel engine exhausting particle filtering body-regenerating method by the catalytic combustion of oxygen-containing fuel. The oxygen-containing fuel is sprayed into the exhausting system of diesel engine to gasify. Then, the fuel enters into the reactor filled with oxidizing catalyst to carry out catalytic combustion. The exhausting temperature of diesel engine is increased and controlled to the particle's firing temperature. This high temperature exhausted gas will quickly regenerate the filtering body. This invention adapts the low temperature exhaustion character of modern diesel engine. The firing reliability is high. The request to the filter material is low. This invention is simple and small. It can also efficiently remove the carbon monoxide and hydroxide.
Description
Technical field:
The invention belongs to a kind of regeneration method of Diesel Particulate Filter body, particularly a kind of method of using oxygenated fuel catalytic combustion regenerative diesel engine exhaust micro particle filtering body.
Background technique:
At present, common Diesel Particulate Filter body regeneration techniques mainly contains following four kinds both at home and abroad:
1. electric heating regeneration
With exhaust of resistance wire heated diesel or filter, the particulate that is accumulated in the filter is heated up until fire burns, realize filter regeneration.This reclaimer is had relatively high expectations to electric energy, generally needs special high-capacity battery or the high-power generator of being equipped with, and makes troubles to application.When adopting diesel oil method regeneration filter, the exhaust filter of generally not flowing through easily causes the filter local temperature too high, and the processing of bypass exhaust difficulty.
2. the combustion-supporting regeneration of oil spout
During filter regeneration, utilize special nozzle to spray a certain amount of diesel oil and air supply to filter, light diesel oil by special ignition mechanism subsequently, the particulate in the filter of igniting is realized regeneration.The combustion-supporting reclaimer complex structure of oil spout, regenerative process are difficult to control, cause filter to damage easily, also can cause secondary pollution.
3. reverse jet regenerating
During regeneration filter is passed to reverse high velocity air, the particulate that deposits in the filter is blown down, and is collected by special gathering-device, utilizes Electric heating appliance to burn again.This apparatus structure complexity, very high to the requirement of sealability, and also work the time need consume a large amount of pressurized air, needs transform the air braking systems of vehicle.
4. cyclic regeneration
Utilize oxidation catalyst that the conversion of nitrogen oxides in the exhaust is become the nitrogen dioxide of strong oxidizing property, utilize the particulate in the nitrogen dioxide oxidation filter again.This method is simple in structure, but the cost of catalyzer is higher.Still can not solve at present the filter regeneration problem under the cryogenic conditions.
Summary of the invention:
Purpose of the present invention just is to overcome above-mentioned the deficiencies in the prior art, and provide a kind of method of using oxygenated fuel catalytic combustion regenerative diesel engine exhaust micro particle filtering body, the reliability height of this method, the temperature of diesel exhaust gas can be increased to the combustible temperature of carbon microsphere, thereby reach the purpose of regeneration filter.
Technological scheme of the present invention is: a kind of method of using oxygenated fuel catalytic combustion regenerative diesel engine exhaust micro particle filtering body, it is characterized in that: oxygenated fuel is sprayed in the vent systems of diesel engine and gasify, and then its feeding is equipped with in the reactor of oxidation catalyst and carries out catalytic combustion, make the delivery temperature of diesel engine improve and control to the kindling temperature of particulate, this high-temperature exhaust air filter of will regenerating rapidly.
Described oxygenated fuel is methyl alcohol or ethanol or dimethyl ether.
Described oxidation catalyst adopts the noble metal type oxidation catalyst.
The kindling temperature of described particulate is controlled between 550 ℃～700 ℃.
A kind of according to the employed reclaimer of above-mentioned regeneration method, it is characterized in that: form by oxygenated fuel supplier, the reactor that oxidation catalyst is housed, diesel particulate filter body, controller and temperature transducer; Controller is connected with fuel supplying device, the oxygenated fuel supplier communicates with diesel engine exhaust system, vent systems communicates with the reactor that oxidation catalyst is housed, the reactor that oxidation catalyst is housed communicates with the diesel particulate filter body, on the reactor that oxidation catalyst is housed and path that the diesel particulate filter body communicates temperature transducer is housed, this temperature transducer is connected with controller.
Described oxygenated fuel supplier is made up of fuel tank, oil pump, oil pressure regulator and electric-controlled fuel injector, electrically controlled injector and controller be connected, communicate with the reactor that oxidation catalyst is housed; Oil pump is connected with oil pressure regulator, and oil pressure regulator links to each other with electrically controlled injector.
Advantage of the present invention is: 1, the volatility of oxygenated fuel is good, spontaneous ignition temperature is low, and itself contains the aerobic composition, is very easy to carry out catalytic oxidation, can adapt to the low characteristics of modern diesel engine delivery temperature well, solve the problem of filter low-temp recovery difficulty; 2, need not ignition mechanism during the oxygenated fuel catalytic combustion, avoided the low defective of other combustion-supporting regeneration class methods igniting reliability; 3, temperature and temperature gradient are all lower in when regeneration filter, and highly stable, therefore to filtering material require low, applicable to most of metal filtration bodies and all ceramic filtering bodies.4, oxygenated fuel catalytic combustion regenerative device construction is simple, and weight and volume is less, is easy to install on the car.5, native system also can efficiently be removed hydroxide and the carbon monoxide in the diesel exhaust gas simultaneously.
Description of drawings:
Fig. 1 is the schematic representation of reclaimer of the present invention
Fig. 2 is an oxygenated fuel supplier schematic representation of the present invention
Fig. 3 is the circuit diagram of controller
Embodiment:
Embodiment 1: use the method for oxygenated fuel catalytic combustion regenerative diesel engine exhaust micro particle filtering body that the porous metals filter is regenerated.As shown in Figure 1: controller (as shown in Figure 3) control fuel supplying device is to vent systems burner oil (methyl alcohol), and fuel sprays into and gasifies rapidly after the vent systems and enter in the reactor that the noble metal type oxidation catalyst is housed.Under the effect of oxidation catalyst, the oxygen exothermic heat of reaction in gas phase fuel and the exhaust improves the temperature of exhaust.Controller is according to the emitted dose of the detected delivery temperature feedback control of temperature transducer fuel, and delivery temperature is controlled at the kindling temperature (generally being controlled at 550 ℃～700 ℃ scopes) of particulate, the high-temperature exhaust air filter of will regenerating rapidly.As shown in Figure 2: during the work of oxygenated fuel supplier, to oil pressure regulator, owing to oil pressure regulator links to each other with electrically controlled injector, so the fuel pressure of electrically controlled injector is constant all the time with petrolift for oil pump.Oil pressure regulator is got back to fuel tank with unnecessary fuel oil.
Embodiment 2: use the method for oxygenated fuel catalytic combustion regenerative diesel engine exhaust micro particle filtering body that wall-flow honeycomb ceramic filter is regenerated.As shown in Figure 1: controller (as shown in Figure 3) control fuel supplying device is to vent systems burner oil (ethanol), and fuel sprays into and gasifies rapidly after the vent systems and enter in the reactor that the noble metal type oxidation catalyst is housed.Under the effect of oxidation catalyst, the oxygen exothermic heat of reaction in gas phase fuel and the exhaust improves the temperature of exhaust.Controller is according to the emitted dose of the detected delivery temperature feedback control of temperature transducer fuel, and delivery temperature is controlled at the kindling temperature (generally being controlled at 550 ℃～700 ℃ scopes) of particulate, the high-temperature exhaust air filter of will regenerating rapidly.As shown in Figure 2: during the work of oxygenated fuel supplier, to oil pressure regulator, owing to oil pressure regulator links to each other with electrically controlled injector, so the fuel pressure of electrically controlled injector is constant all the time with petrolift for oil pump.Oil pressure regulator is got back to fuel tank with unnecessary fuel oil.
Embodiment 3 uses the method for oxygenated fuel catalytic combustion regenerative diesel engine exhaust micro particle filtering body that the ceramic fiber filter is regenerated.As shown in Figure 1: controller (as shown in Figure 3) control fuel supplying device is to vent systems burner oil (dimethyl ether), and fuel sprays into and gasifies rapidly after the vent systems and enter in the reactor that the noble metal type oxidation catalyst is housed.Under the effect of oxidation catalyst, the oxygen exothermic heat of reaction in gas phase fuel and the exhaust improves the temperature of exhaust.Controller is according to the emitted dose of the detected delivery temperature feedback control of temperature transducer fuel, and delivery temperature is controlled at the kindling temperature (generally being controlled at 550 ℃～700 ℃ scopes) of particulate, the high-temperature exhaust air filter of will regenerating rapidly.As shown in Figure 2: during the work of oxygenated fuel supplier, to oil pressure regulator, owing to oil pressure regulator links to each other with electrically controlled injector, so the fuel pressure of electrically controlled injector is constant all the time with petrolift for oil pump.Oil pressure regulator is got back to fuel tank with unnecessary fuel oil.
Principle of the present invention is: itself contain oxygen in the molecule of oxygenated fuel, the fuel oxidation reaction is more rapid, initiation temperature is lower to making, and has also reduced the requirement to oxygen content in the exhaust simultaneously.The boiling point of oxygenated fuel generally lower (methyl alcohol boiling point 64.5 methyl alcohol, ethanol boiling point are 78.4 ℃) after liquid phase fuel sprays into exhaust, evaporates into gas phase rapidly, helps the oxidation catalysis reaction, and other fuel has than remarkable advantages relatively.The characteristics of this easy oxidation, the difficult technical barrier of regeneration when having solved filter low temperature well.
When utilizing oxygenated fuel catalytic reaction regeneration filter, need oxygen and participate in burning.Oxygen content in the diesel exhaust gas generally changes 9%～18%.When diesel engine was idling, oxygen content was higher in the exhaust, generally can reach about 18%, and along with diesel load increases, oxygen content reduces gradually in the exhaust, but generally more than 9%.When the oxygen content in the exhaust was low, delivery temperature was than higher, and the fuel that need spray into is less, and the demand of reaction pair oxygen is also less; When row's temperature is relatively lower, need spray into a large amount of fuel, this moment is bigger to the demand of oxygen, but the actual oxygen content in exhaust this moment is also than higher.This shows no matter what operating mode diesel engine is in, the oxygen content in the exhaust can satisfy the needs of fuel catalytic oxidation reaction.
When adopting oxygenated fuel catalytic reaction regeneration filter, because the heating power that provides is bigger, exhaust does not need bypass.When the carbon microsphere in the filter was lighted, its heat release is deflated rapidly to be taken away, so the inside temperature gradient is very little during filter regeneration, has avoided the common cause thermal damage of other method well.Because maximum temperature and temperature gradient during regeneration in the filter are all smaller, so this method is lower to the material requirements of filter.
Claims (6)
1, a kind of method of using oxygenated fuel catalytic combustion regenerative diesel engine exhaust micro particle filtering body, it is characterized in that: oxygenated fuel is sprayed in the vent systems of diesel engine and gasify, and then its feeding is equipped with in the reactor of oxidation catalyst and carries out catalytic combustion, make the delivery temperature of diesel engine improve and control to the kindling temperature of particulate, this high-temperature exhaust air filter of will regenerating rapidly.
2, a kind of method of using oxygenated fuel catalytic combustion regenerative diesel engine exhaust micro particle filtering body according to claim 1 is characterized in that: described oxygenated fuel is methyl alcohol or ethanol or dimethyl ether.
3, a kind of method of using oxygenated fuel catalytic combustion regenerative diesel engine exhaust micro particle filtering body is characterized in that: described oxidation catalyst adopts the noble metal type oxidation catalyst.
4, a kind of method of using oxygenated fuel catalytic combustion regenerative diesel engine exhaust micro particle filtering body is characterized in that: the kindling temperature of described particulate is controlled between 550 ℃～700 ℃.
5, a kind of a kind of employed reclaimer of method that uses oxygenated fuel catalytic combustion regenerative diesel engine exhaust micro particle filtering body according to claim 1 is characterized in that: be made up of oxygenated fuel supplier, the reactor that oxidation catalyst is housed, diesel particulate filter body, controller and temperature transducer; Controller is connected with fuel supplying device, the oxygenated fuel supplier communicates with diesel engine exhaust system, vent systems communicates with the reactor that oxidation catalyst is housed, the reactor that oxidation catalyst is housed communicates with the diesel particulate filter body, on the reactor that oxidation catalyst is housed and path that the diesel particulate filter body communicates temperature transducer is housed, this temperature transducer is connected with controller.
6, a kind of employed reclaimer of method that uses oxygenated fuel catalytic combustion regenerative diesel engine exhaust micro particle filtering body according to claim 5, it is characterized in that: described oxygenated fuel supplier is made up of fuel tank, oil pump, oil pressure regulator and electric-controlled fuel injector, electrically controlled injector and controller be connected, communicate with the reactor that oxidation catalyst is housed; Oil pump is connected with oil pressure regulator, and oil pressure regulator links to each other with electrically controlled injector.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200510014452 CN1896467A (en) | 2005-07-11 | 2005-07-11 | Method and regenerator for discharging microgranular filter by oxy-acid fuel catalytic combustion regenerative diesel engine |
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| Application Number | Priority Date | Filing Date | Title |
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| CN 200510014452 CN1896467A (en) | 2005-07-11 | 2005-07-11 | Method and regenerator for discharging microgranular filter by oxy-acid fuel catalytic combustion regenerative diesel engine |
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| CN1896467A true CN1896467A (en) | 2007-01-17 |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101598052A (en) * | 2008-06-06 | 2009-12-09 | 福特环球技术公司 | Reduce the method for discharge of poisonous waste of internal combustion engine |
| US7877987B2 (en) | 2007-06-15 | 2011-02-01 | Gm Global Technology Operations, Inc. | Electrically heated particulate filter regeneration using hydrocarbon adsorbents |
| CN101418712B (en) * | 2007-10-22 | 2011-05-11 | 通用汽车环球科技运作公司 | Electrically heated particulate filter regeneration using hydrocarbon adsorbents |
| CN101680334B (en) * | 2007-05-10 | 2012-11-07 | Sk新技术株式会社 | A system and method for purifying exhaust gas for a diesel vehicle using fuel borne catalyst |
| CN105545418A (en) * | 2016-01-29 | 2016-05-04 | 中国人民解放军军事交通学院 | Combustion-supporting regeneration method and equipment for filtering body of exhaust particles of diesel engine by spraying anhydrous ethanol |
| WO2016149963A1 (en) * | 2015-03-24 | 2016-09-29 | 金坛鸿鑫电子科技有限公司 | Instant combustion-type particulate matter trap and trapping method therefor |
-
2005
- 2005-07-11 CN CN 200510014452 patent/CN1896467A/en active Pending
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101680334B (en) * | 2007-05-10 | 2012-11-07 | Sk新技术株式会社 | A system and method for purifying exhaust gas for a diesel vehicle using fuel borne catalyst |
| US7877987B2 (en) | 2007-06-15 | 2011-02-01 | Gm Global Technology Operations, Inc. | Electrically heated particulate filter regeneration using hydrocarbon adsorbents |
| CN101418712B (en) * | 2007-10-22 | 2011-05-11 | 通用汽车环球科技运作公司 | Electrically heated particulate filter regeneration using hydrocarbon adsorbents |
| CN101598052A (en) * | 2008-06-06 | 2009-12-09 | 福特环球技术公司 | Reduce the method for discharge of poisonous waste of internal combustion engine |
| CN101598052B (en) * | 2008-06-06 | 2013-03-06 | 福特环球技术公司 | Method for reducing discharge of poisonous waste of internal combustion engine |
| WO2016149963A1 (en) * | 2015-03-24 | 2016-09-29 | 金坛鸿鑫电子科技有限公司 | Instant combustion-type particulate matter trap and trapping method therefor |
| CN105545418A (en) * | 2016-01-29 | 2016-05-04 | 中国人民解放军军事交通学院 | Combustion-supporting regeneration method and equipment for filtering body of exhaust particles of diesel engine by spraying anhydrous ethanol |
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