CN210289880U

CN210289880U - DPF/GPF (diesel particulate filter/general purpose filter) electric heating offline active regeneration system

Info

Publication number: CN210289880U
Application number: CN201920680936.1U
Authority: CN
Inventors: 王远书; 蒋旭东; 莫志远; 李炜
Original assignee: Hefei Baofa Power Technology Co Ltd
Current assignee: Hefei Baofa Power Technology Co Ltd
Priority date: 2019-05-14
Filing date: 2019-05-14
Publication date: 2020-04-10
Anticipated expiration: 2029-05-14

Abstract

The utility model discloses a DPF/GPF electrical heating off-line initiative regeneration system, including DPF/GPF and electric heater, DPF/GPF's the side of admitting air is equipped with first temperature sensor and pressure sensor respectively, DPF/GPF's the side of giving vent to anger is equipped with second temperature sensor, still including the controller, the air-blower, it is first, two relays and power, the air-blower is connected with the supply-air duct who accesss to the electric heater side of admitting air, the power is connected with electric heater through first relay on the one hand, on the other hand is connected with the air-blower through the second relay, the controller on the one hand respectively with first, two temperature sensor and pressure sensor are connected, on the other hand is respectively with first, two relays are connected. The utility model discloses simple structure takes relatively more flat and, reasonable mode to realize off-line electrical heating initiative regeneration, has solved security, suitability, principle scheduling problem that DPF/GPF this kind of owner, regeneration passively.

Description

DPF/GPF (diesel particulate filter/general purpose filter) electric heating offline active regeneration system

Technical Field

The utility model relates to a diesel engine car aftertreatment technical field specifically is a DPF/GPF electrical heating off-line initiative regeneration system.

Background

The current technical route of the road vehicle state six emission and non-road state four emission stages is DPF/GPF + SCR, or DPF/GPF; and in vehicle modification projects, products such as DPF/GPF for efficiently treating PM particulate matters are commonly adopted in the technologies. The regeneration method generally adopts the following steps: active, passive, or active and passive combined regeneration. The carbon particulate matter can be oxidized into CO2 gas by the PM particulate matter captured regularly or irregularly through a chemical reaction mode, so that the smoothness of the interior of the DPF/GPF is kept, the pressure rise of the interior of the DPF/GPF is prevented, and the internal combustion machine can continuously and stably work.

Entering the six-state emission stage of road vehicles and the four-state emission stage of non-road vehicles, the whole vehicle post-treatment system inevitably needs to use DPF/GPF products as the best treatment means of PM particles. However, due to the structure of the DPF/GPF, various ash, metal chips, sulfate, and other substances generated after active and passive regeneration cannot be discharged out of the wall-flow structure of the DPF/GPF, which gradually increases the back pressure of the exhaust system, and finally causes the pressure of the exhaust system to be too high, and frequent shutdown and cleaning of the back-blowing DPF/GPF are required, so that the DPF/GPF has a function of improving the trapping capacity again, and the accumulated back pressure of the DPF/GPF is reduced.

However, each internal combustion machine is not convenient for cleaning, maintaining and maintaining the DPF/GPF, and part of the internal combustion machines are difficult to clean and maintain the DPF/GPF regularly (for example, a small-tonnage diesel forklift, because the DPF is arranged at the original muffler position as a muffler substitute, a metal weight-forklift counterweight is arranged on the DPF, if the DPF is not manually cleaned and maintained without the assistance of hoisting equipment such as a crane, the cleaning task cannot be completed in time, the blockage aggravation of the DPF, the continuous rising of the exhaust system, the subsequent boiling of a water tank and a series of consequences of engine scuffing can be generated naturally); in addition, the regeneration mode of violent combustion has strong damage to a post-treatment system, the DPF/GPF is easy to burn, and an after-treatment air outlet is usually accompanied by open flames, so that the safety of a specific occasion is poor; there is another type of pseudo-active regeneration on the market: the regeneration method also adopts an electric heating mode, wherein the regeneration mode is pseudo-active regeneration and still passive regeneration in principle, the active regeneration mode utilizes a low-power heater to heat the passing air to the temperature of passive regeneration so as to realize the passive regeneration of the carbon particulate matters, and the regeneration mode also has many unreasonables, such as the temperature does not meet the conditions of the active regeneration, and meanwhile, the passing air hardly has NO2 gas and does not meet the conditions of the passive regeneration.

SUMMERY OF THE UTILITY MODEL

The utility model aims at providing a DPF/GPF electrical heating off-line initiative regeneration system, take relatively more flat and, reasonable mode realizes off-line electrical heating initiative regeneration, after stopping promptly through electric heater will block up silicon carbide DPF/GPF and heat up to carbon dust ignition point temperature (about 600 ℃), through controllable air-blower oxygen suppliment, realize that the carbon particulate matter PM of entrapment reaches the purpose of spontaneous ignition point in order to realize initiative regeneration in DPF/GPF, in order to solve this kind of owner of DPF/GPF, passive regeneration's security, suitability, principle scheduling problem.

The technical scheme of the utility model as follows:

a DPF/GPF electrically heated offline active regeneration system comprises a DPF/GPF installed in an exhaust pipeline and an electric heater, wherein the electric heater is positioned on the air inlet side of the DPF/GPF, and the DPF/GPF is characterized in that: the air inlet side of the DPF/GPF is provided with a first temperature sensor and a pressure sensor respectively, the air outlet side of the DPF/GPF is provided with a second temperature sensor, the DPF/GPF air-conditioning system further comprises a controller, an air blower, a first relay, a second relay and a power supply, the air blower is connected with an air supply pipeline leading to the air inlet side of the electric heater, the power supply is connected with the electric heater through the first relay on one hand, and is connected with the air blower through the second relay on the other hand, the controller is connected with the first temperature sensor, the second temperature sensor and the pressure sensor on the one hand, and is connected with the first relay and the second relay on the other hand.

The DPF/GPF electric heating off-line active regeneration system is characterized in that: the electric heater adopts a disc heater.

The DPF/GPF electric heating off-line active regeneration system is characterized in that: the controller adopts ECU.

The DPF/GPF electric heating off-line active regeneration system is characterized in that: the power supply adopts a 380V alternating current power supply.

The DPF/GPF electric heating off-line active regeneration system is characterized in that: and a check valve is arranged in the air supply pipeline.

The utility model has the advantages that:

1. the active regeneration process of the utility model adopts a 380V alternating current to heat the silicon carbide DPF/GPF, so that the carbon particles in the silicon carbide DPF/GPF reach the self-ignition point, and the whole process is controlled, flatter and more stable;

2. the active regeneration process of the utility model can not generate negative effect by carrying out strategy control on the electric heater and the blower, and can strictly control the air outlet side without generating open fire, thus being safer and more reliable;

3. the utility model discloses whole initiative regeneration process is automatic control, and is the regeneration of parkking, need not artifical too much participation control, has realized intelligent application.

Drawings

Fig. 1 is a schematic structural diagram of the present invention.

Detailed Description

Referring to fig. 1, the DPF/GPF electrically-heated off-line active regeneration system comprises a DPF/GPF2(DPF is a diesel particulate trap, GPF is a gasoline particulate trap, the same below) and an electric heater 3 which are installed in a discharge pipeline 1, wherein the electric heater 3 is positioned on an air inlet side of a DPF/GPF2, a first temperature sensor 4 and a pressure sensor 5 are respectively arranged on the air inlet side of the DPF/GPF2, a second temperature sensor 6 is arranged on an air outlet side of the DPF/GPF2, the DPF/GPF off-line active regeneration system further comprises a controller 7, a blower 8, first and

second relays

9 and 10 and a power supply 11, the blower 8 is connected with an air supply pipeline 12 leading to the air inlet side of the electric heater 3, the power supply 11 is connected with the electric heater 3 through the first relay 9 on one hand, and the blower 8 through the second relay 10 on the other hand, and the controller 7 is connected with the first, 6 is connected to the pressure sensor 5, and on the other hand, is connected to first and

second relays

9 and 10, respectively.

The utility model discloses in, electric heater 3 adopts disc heater (380V 5000W), and body heating efficiency is in 1000 ℃/30S, and can reach 1000 ℃, and the durability needs to satisfy and starts the number of times and is higher than 5000 or 5 years.

The controller 7 employs an ECU.

The power supply 11 adopts 380V alternating current power supply.

A check valve 13 is installed in the blowing duct 12 to prevent reverse flow of air.

The invention is further described below with reference to the accompanying drawings:

after the internal combustion machine is stopped, a power supply 11(380V alternating current power supply instead of a vehicle-mounted power supply) can respectively supply power to an electric heater 3 and a blower 8, a first temperature sensor 4, a second temperature sensor 6 and a pressure sensor 5 detect the temperature and the air pressure of DPF/GPF2 in real time and feed back the temperature and the air pressure to a controller 7, when the controller 7 analyzes the temperature and the air pressure through calculation and respectively lower than set values, an electric heating active regeneration process is started, namely control signals are output to respectively drive a first relay 9 and a second relay 10 to work, power supply loops between the power supply 11 and the electric heater 3 and the blower 8 are respectively conducted, the electric heater 3 and the blower 8 are electrically operated, the electric heater 3 supplies heat to the DPF/GPF2, the blower 8 supplies oxygen to the DPF/GPF2, the internal temperature of the DPF/GPF2 can be gradually increased and is finally stabilized at about 600 ℃, carbon particulate matters trapped inside, the purpose of spontaneous combustion of carbon particles in the DPF/GPF2 is achieved, and the effect of active regeneration is achieved.

The utility model provides an exhaust system tail gas purification technique DPF GPF that is ordinary initiative, passive, the initiative combines passively down at present block up the problem that can't conveniently clear up, reduced work load and human cost. The existing exhaust tail gas purification technology still needs unscheduled back-blowing cleaning or violent active regeneration, otherwise, an exhaust system can gradually cause the rising of exhaust backpressure because ash, metal chips, sulfate and other substances generated by active and passive regeneration cannot be discharged out of a wall-flow structure of the DPF/GPF, and the back-blowing DPF/GPF needs to be stopped to be cleaned, so that the back-blowing DPF/GPF has the capability of improving the capture capacity again, and the accumulated back pressure of the DPF/GPF is reduced.

The utility model is suitable for an any DPF/GPF aftertreatment field has realized all exhaust high temperature unstability, normality low temperature internal combustion machinery tail gas aftertreatment DPF/GPF's initiative regeneration.

The above embodiments are only described for the preferred embodiments of the present invention, and are not intended to limit the protection scope of the present invention, and the modifications and improvements made by the technical solutions of the present invention should fall into the protection scope of the present invention without departing from the design spirit of the present invention.

Claims

1. A DPF/GPF electrically heated offline active regeneration system comprises a DPF/GPF installed in an exhaust pipeline and an electric heater, wherein the electric heater is positioned on the air inlet side of the DPF/GPF, and the DPF/GPF is characterized in that: the air inlet side of the DPF/GPF is provided with a first temperature sensor and a pressure sensor respectively, the air outlet side of the DPF/GPF is provided with a second temperature sensor, the DPF/GPF air-conditioning system further comprises a controller, an air blower, a first relay, a second relay and a power supply, the air blower is connected with an air supply pipeline leading to the air inlet side of the electric heater, the power supply is connected with the electric heater through the first relay on one hand, and is connected with the air blower through the second relay on the other hand, the controller is connected with the first temperature sensor, the second temperature sensor and the pressure sensor on the one hand, and is connected with the first relay and the second relay on the other hand.

2. The DPF/GPF electrically heated offline active regeneration system of claim 1, wherein: the electric heater adopts a disc heater.

3. The DPF/GPF electrically heated offline active regeneration system of claim 1, wherein: the controller adopts ECU.

4. The DPF/GPF electrically heated offline active regeneration system of claim 1, wherein: the power supply adopts a 380V alternating current power supply.

5. The DPF/GPF electrically heated offline active regeneration system of claim 1, wherein: and a check valve is arranged in the air supply pipeline.