CN108757116B - Active regeneration particle catcher and control method - Google Patents
Active regeneration particle catcher and control method Download PDFInfo
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- CN108757116B CN108757116B CN201810487149.5A CN201810487149A CN108757116B CN 108757116 B CN108757116 B CN 108757116B CN 201810487149 A CN201810487149 A CN 201810487149A CN 108757116 B CN108757116 B CN 108757116B
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- air inlet
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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
- F01N3/023—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 using means for regenerating the filters, e.g. by burning trapped particles
- F01N3/027—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 using means for regenerating the filters, e.g. by burning trapped particles using electric or magnetic heating means
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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
- F01N13/008—Mounting or arrangement of exhaust sensors in or on exhaust apparatus
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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
- F01N3/033—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 in combination with other devices
- F01N3/035—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 in combination with other devices with catalytic reactors, e.g. catalysed diesel 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
- F01N3/10—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
- F01N3/105—General auxiliary catalysts, e.g. upstream or downstream of the main catalyst
- F01N3/106—Auxiliary oxidation catalysts
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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
- F01N9/00—Electrical control of exhaust gas treating apparatus
- F01N9/002—Electrical control of exhaust gas treating apparatus of filter regeneration, e.g. detection of clogging
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T10/00—Road transport of goods or passengers
- Y02T10/10—Internal combustion engine [ICE] based vehicles
- Y02T10/40—Engine management systems
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Materials Engineering (AREA)
- Analytical Chemistry (AREA)
- Health & Medical Sciences (AREA)
- Toxicology (AREA)
- Processes For Solid Components From Exhaust (AREA)
- Processing Of Solid Wastes (AREA)
Abstract
The utility model provides an initiative regeneration particle trap and control method, belong to tail gas purification technical field, its trap includes the casing, filter body (1), electrical heating initiative regeneration system (2), intake pipe (3), outlet duct (4), electrical heating initiative regeneration system comprises cavity casing (9), electric heater unit (10), heat conduction liquid (11), cavity casing (9) are the hollow tube that has the intermediate layer, the hole of hollow tube pastes on the cylinder surface of filter body (1), heat conduction liquid (11) are annotated in the intermediate layer bottom of hollow tube, electric heater unit (10) dress is in the bottom of cavity casing (9) intermediate layer, its method: when the difference between the intake pressure sensor (151) and the output pressure sensor (152) is equal to or greater than a predetermined value, the electric heating device (10) is powered on, and when the difference is less than the predetermined value, the electric heating device (10) is powered off. Even heating, low energy consumption, good regeneration effect and safety.
Description
Technical Field
The invention relates to a particle catcher and a control method, in particular to an active regeneration particle catcher and a control method, and belongs to the technical field of engine tail gas purification.
Background
The engine is widely applied to engines of automobiles, engineering machinery, agricultural machinery, train tractors and ships at present, and a large amount of particulate matters are discharged during operation, so that the engine not only causes serious harm to human health, but also causes serious pollution to the environment. Therefore, a large amount of manpower and material resources are input into the industry to research various modes of engine particulate matter post-treatment technology and products, and great contribution is made to the improvement of the emission level of the engine. The deposition of particulate matter within the DPF increases the pressure drop across it, affecting engine performance, and therefore requires removal of the deposited particulate matter, i.e., regeneration techniques. Sun Zhu, sun Ping, , zhao Saibo et al in 2014, 2 nd month, on 211 st stage of engine for vehicle, have proposed a device for electrically regenerating a particulate filter, wherein the electric heater is a ceramic electric heater in the form of a ring with ceramic strips passing through, and is mainly composed of three parts: a constant temperature high frequency ceramic body, a heating resistance wire, an aluminum silicate fiber plate and a heat insulator shell formed by stainless steel. When the DPF regeneration device works, the temperature control unit adjusts the working range of the heating resistance wire, the temperature of the inner cavity is increased through the heat transfer effect of the high-frequency ceramic body, the ignition temperature of the carbon smoke particles is reached, the particles are burnt, and the DPF regeneration is realized. The method has the characteristics of high heating speed, high heating temperature and simple device. But the heating is uneven, the temperature gradient is easy to appear, the regeneration effect is poor, the electric heating wire has the risks of ageing peeling, short circuit fire and the like, and potential safety hazards are easy to cause.
Disclosure of Invention
The invention aims to overcome the defects and shortcomings of nonuniform electric heating, poor regeneration effect and poor safety in the prior art and provides an active regeneration particle catcher. It has even heating, low energy consumption, good regeneration effect and safety.
The second object of the invention is to provide a control method of the active regeneration particle catcher, which has the advantages of simple operation, convenient control, higher regeneration efficiency and safe and reliable use.
The technical solution for realizing the first object of the invention is as follows: the utility model provides an initiative regeneration particle trap, includes casing, filter body, electrical heating initiative regeneration system, intake pipe, outlet duct, the front end and the intake pipe of casing are linked together, the rear end and the outlet duct of casing are linked together, the casing be the cavity casing, electrical heating initiative regeneration system constitute by cavity casing, electrical heating device, heat conduction liquid, the cavity casing be the hollow tube that has the intermediate layer, the hole of hollow tube is attached on the cylinder surface of filter body, the heat conduction liquid has been annotated to the intermediate layer bottom of hollow tube, electrical heating device adorn in the bottom of cavity casing intermediate layer.
One end of the cavity shell, which faces the air inlet pipe, is communicated with a protruding cavity part, and the protruding cavity part is a pipe body with an interlayer.
The protruding cavity part is arranged at the front end of the filter body and can extend into the pipe orifice of the air inlet pipe, and the length of the protruding cavity part extending out of the front end of the filter body is 2/5-2 times of the maximum overflow diameter of the filter body.
The minimum inner hole diameter of the protruding cavity body is larger than or equal to the inner diameter of the air inlet pipe, and the maximum inner hole diameter of the protruding cavity body is equal to the maximum overflow diameter of the filter body.
The filter body is composed of a particle catcher filter body or a particle catcher filter body and an oxidation catalyst, wherein the interval between the particle catcher filter body and the oxidation catalyst carrier is 10-100mm, the oxidation catalyst carrier is arranged at one end, close to an air inlet pipe, in the cavity shell, and the particle catcher filter body is arranged at one end, close to an air outlet pipe, in the cavity shell.
An air inlet pipe at the front end of the cavity shell is provided with an air inlet temperature sensor and an air inlet pressure sensor, and an air outlet pipe is provided with an air outlet temperature sensor and an air outlet pressure sensor.
A gasket made of heat conducting materials is arranged between the inner hole of the cavity shell and the outer surface of the cylinder body of the filter body.
An insulating layer is arranged on the outer surface of the cavity shell.
The cavity shell is provided with a safety device, and the safety device mainly comprises a temperature control device.
The electric heating device is provided with a heating module and a heat preservation module.
The invention realizes the second object technical solution is a control method of an active regeneration particle catcher, comprising the following steps:
(1) When the difference between the air inlet pressure sensor and the air outlet pressure sensor is greater than or equal to 20kPa-30kPa, a heating module in the electric heating device is powered on to heat the heat conducting liquid, and the heat of the heat conducting liquid is conducted to the filter body through the cavity shell, so that the temperature of the filter body is increased, and carbon particles and NO are generated when the temperature is about 350 DEG C 2 React to generate CO 2 Thereby removing the carbon loading of the DPF, and oxidizing NO to generate NO when the temperature of the catalytic oxidizer is increased to about 350 DEG C 2 Is most efficient, NO in the same time period 2 The more the amount is, the more carbon particles are oxidized, so that the DPF can be regenerated quickly;
(2) The method comprises the steps of measuring temperature values of an air inlet temperature sensor and an air outlet temperature sensor while heating a heating module in an electric heating device, and cutting off a power supply of the heating module in the electric heating device and switching on a power supply of a heat preservation module in the electric heating device when average values of the temperature values respectively measured by the air inlet temperature sensor and the air outlet temperature sensor reach 10-30 ℃ above a regeneration temperature, wherein the heat preservation module preserves heat of heat conduction liquid;
(3) When the temperature average value shown by the air inlet temperature sensor and the air outlet temperature sensor is lower than the regeneration temperature by 10 ℃ below the regeneration temperature while the heat preservation module in the electric heating device is preserving heat, the power supply of the heat preservation module in the electric heating device is cut off, the power supply of the heating module in the electric heating device is switched on, and the heat conduction liquid is reheated;
(4) When the heating module in the electric heating device heats, the safety device is started and the power supply is cut off when the temperature of the heat conduction liquid reaches the highest use temperature of the heat conduction liquid, and the electric heating device stops working;
(5) When the power supply of the heating module or the heat preservation module in the electric heating device is connected, and the difference value between the air inlet pressure sensor and the air outlet pressure sensor is smaller than 5kPa-15kPa, the power supply of the heating module and the heat preservation module of the electric heating device is cut off, and the electric heating device stops working.
Compared with the prior art, the invention has the beneficial effects that:
1. in the prior art, the electric heating wires have the risks of ageing, peeling, short circuit, fire and the like, and the potential safety hazards are avoided by heating the heat conducting liquid as a medium, so that the catcher is heated uniformly, and the temperature gradient can not occur, thereby ensuring the long-time use of the catcher.
2. In the prior art, heating resistance wires are wound on a filter body, heat of the heating resistance wires can only diffuse from the winding position of the resistance wires to the inside of the filter body, the gradient of heat transfer on the filter body is large, on one hand, the whole filter body is heated unevenly, the temperature fluctuation in the filter body is large, on the other hand, the front end temperature of the filter body close to an air inlet pipe orifice is low, even if an electric heating device is arranged on the outer surface of a cylinder body of the filter body, namely the outer wall, the front end temperature of the filter body is difficult to reach the requirement of regeneration temperature due to large low-temperature gas flow, the phenomenon that the carbon load of the front end of the filter body is too high is generated, the back pressure of the front end gas and the back end gas of a catcher is difficult to reduce, and the regeneration efficiency of the catcher is influenced. The cavity shell is filled with the heat conducting liquid as the heat transfer medium, the heat conducting liquid can transfer heat uniformly, the heat transfer gradient is small, the whole filter body is heated uniformly, and particularly, the convex cavity part arranged at the front end of the filter body can transfer heat generated by the electric heating device to the pipe opening part of the air inlet pipe laterally through the heat transfer medium, and then heated gas is sent to the front end of the filter body, so that the temperature of the front end of the filter body can rise to the regeneration temperature range, the whole internal temperature of the particle catcher is ensured to reach the regeneration temperature requirement, and carbon particles in the filter body are fully combusted.
3. The invention changes the filter body into an oxidation catalyst carrier and a particle trapThe filter bodies are assembled together, and simultaneously the oxidation catalyst carrier and the particle catcher filter bodies are heated, and the carbon particles are NO at about 350 DEG C 2 React to generate CO 2 Thereby removing carbon load in DPF, and when the temperature of the catalytic oxidizer is increased to about 350 ℃, NO is oxidized to generate NO 2 Is most efficient, NO in the same time period 2 The more the amount, the more the carbon particles are oxidized, ensuring a rapid regeneration of the trap.
4. According to the invention, the air inlet temperature sensor, the air inlet pressure sensor, the air outlet temperature sensor and the air outlet pressure sensor are arranged on the air inlet end pipe body and the air outlet end pipe body of the filter body, when the difference value between the air inlet pressure sensor and the air outlet pressure sensor reaches the condition needing regeneration, the electric heating active regeneration auxiliary system is started, the active regeneration of the particle catcher is realized, and the manual starting is not needed when the regeneration is needed. When the average value of the air inlet temperature sensor and the air outlet temperature sensor reaches the regeneration target temperature, the electric heating device is converted into the heat preservation module from the heating module, so that the temperature required by regeneration of the particle catcher is ensured to be maintained under low power.
5. The liner between the hollow cavity shell and the filter body strengthens the structural stability of the hollow cavity shell and the filter body and can effectively transfer heat.
6. The heat insulation layer on the outer surface of the hollow cavity shell can prevent heat from being unnecessarily diffused, and reduce energy consumption.
7. The safety device is arranged on the hollow cavity shell, so that potential safety hazards caused by overhigh heating of the heat conducting liquid are prevented.
8. The heating device is provided with the heat preservation module, so that the control is convenient, the power is only 1/5-1/3 of that of the heating module, the control of the heat preservation range is flexible, and the energy consumption can be reduced.
9. The control method of the invention realizes the purpose of active regeneration of the particle catcher, and the working temperature range can be effectively controlled, thereby reducing the energy consumption.
Drawings
FIG. 1 is a schematic view of a first construction of a particle catcher of the present invention;
fig. 2 is a schematic view of a first construction of the cavity housing 9 of the present invention;
FIG. 3 is a schematic view of a second construction of a particle catcher of the present invention;
fig. 4 is a schematic view of a second construction of the cavity housing 9 of the present invention;
FIG. 5 is a schematic view of a third construction of a particle catcher according to the present invention;
fig. 6 is a schematic view of a fourth construction of a particle catcher according to the present invention.
In the drawings, 1a filter body, 1b an oxidation catalyst carrier, 2 an electric heating active regeneration auxiliary system, 3 an air inlet pipe, 4 an air outlet pipe, 5 a flange, 6 a flange, 7 a bolt, 8 a bolt, 9 a cavity shell, 91 a convex cavity part, 10 an electric heating device, 11 a heat conducting liquid, 12 a safety device, 13 a liner, 141 an air inlet pressure sensor, 151 an air inlet temperature sensor, 142 an air outlet pressure sensor, 152 an air outlet temperature sensor and 16 a heat insulating layer.
Detailed Description
The present invention will be further described with reference to the accompanying drawings and the detailed description, but the present invention is not limited to the following examples.
The invention relates to an active regeneration particle catcher which comprises a shell, a filter body 1, an electric heating active regeneration system 2, an air inlet pipe 3 and an air outlet pipe 4, wherein the front end of the shell is communicated with the air inlet pipe 3 through a flange 5, the rear end of the shell is communicated with the air outlet pipe 4 through a flange 6, the flange 5 is fixed through a bolt 7, the flange 6 is fixed through a bolt 8, the shell is a cavity shell 9, the electric heating active regeneration system 2 consists of the cavity shell 9, an electric heating device 10 and a heat conducting liquid 11, the cavity shell 9 is a hollow pipe with an interlayer, an inner hole of the hollow pipe is attached to the outer surface of a cylinder of the filter body 1, the heat conducting liquid 11 is injected into the bottom of the interlayer of the hollow pipe, and the electric heating device 10 is arranged at the bottom of the interlayer of the cavity shell 9.
The cavity shell 9 is communicated with a protruding cavity 91 towards one end of the air inlet pipe 3, and the protruding cavity 91 is a pipe body with an interlayer.
The protruding cavity 91 is arranged at the front end of the filter body 1 and can extend into the pipe orifice of the air inlet pipe 3, and the length of the protruding cavity 91 extending out of the front end of the filter body 1 is 2/5-2 times of the maximum overflow diameter of the filter body 1.
The minimum inner hole diameter of the pipe body of the protruding cavity 91 is larger than or equal to the inner diameter of the air inlet pipe 3, and the maximum inner hole diameter of the pipe body of the protruding cavity 91 is equal to the maximum overflow diameter of the filter body 1.
The filter body 1 is composed of a particle catcher filter body 1a or a particle catcher filter body 1a and an oxidation catalyst carrier 1b, wherein the interval between the particle catcher filter body 1a and the oxidation catalyst carrier 1b is 10-100mm, the oxidation catalyst carrier 1b is arranged at one end, close to the air inlet pipe 3, in the cavity shell 9, and the particle catcher filter body 1a is arranged at one end, close to the air outlet pipe 4, in the cavity shell 9.
An air inlet pipe 3 at the front end of the cavity shell 9 is provided with an air inlet temperature sensor 141 and an air inlet pressure sensor 151, and the air outlet pipe 4 is provided with an air outlet temperature sensor 142 and an air outlet pressure sensor 152.
A gasket 13 made of heat conducting material is arranged between the inner hole of the cavity shell 9 and the outer surface of the cylinder of the filter body 1.
An insulating layer 16 is provided on the outer surface of the cavity housing 9.
The cavity shell 9 is provided with a safety device 12 which mainly comprises a temperature control device.
The electric heating device 10 is provided with a heating module and a heat preservation module.
A control method of an active regeneration particle catcher, comprising the following steps:
(1) When the difference between the air inlet pressure sensor 151 and the air outlet pressure sensor 152 is greater than or equal to 20kPa-30kPa, a heating module in the electric heating device 10 is powered on to heat the heat conducting liquid 11, and the heat of the heat conducting liquid 11 is conducted to the filter body 1 through the cavity shell 9, so that the temperature of the filter body 1 is increased;
(2) Measuring the temperature values of the air inlet temperature sensor 141 and the air outlet temperature sensor 142 while heating the heating module in the electric heating device 10, and when the average value of the temperature values measured by the air inlet temperature sensor 141 and the air outlet temperature sensor 142 respectively reaches 10-30 ℃ above the regeneration temperature, cutting off the power supply of the heating module in the electric heating device 10, switching on the power supply of the heat preservation module in the electric heating device 10, and preserving the heat of the heat conduction liquid 11 by the heat preservation module;
(3) While the heat preservation module in the electric heating device 10 is preserving heat, when the average temperature value shown by the air inlet temperature sensor 141 and the air outlet temperature sensor 142 is lower than the regeneration temperature to 10 ℃ below the regeneration temperature, the power supply of the heat preservation module in the electric heating device 10 is cut off, the power supply of the heating module in the electric heating device 10 is turned on, and the heat conduction liquid 11 is reheated;
(4) When the heating module in the electric heating device 10 heats, the safety device 12 is started and the power supply is cut off when the temperature of the heat conduction liquid 11 reaches the highest use temperature of the heat conduction liquid, and the electric heating device 10 stops working;
(5) When the difference between the intake pressure sensor 151 and the output pressure sensor 152 is less than 5kPa-15kPa while the power supply of the heating module or the heat-preserving module in the electric heating apparatus 10 is turned on, the power supply of the heating module and the heat-preserving module of the electric heating apparatus 10 is turned off, and the electric heating apparatus 10 stops working.
Example 1
Referring to fig. 1 and 2, the active regeneration particle catcher comprises a shell, a filter body 1, an electric heating active regeneration system 2, an air inlet pipe 3 and an air outlet pipe 4, wherein the front end of the shell is communicated with the air inlet pipe 3 through a flange 5, the rear end of the shell is communicated with the air outlet pipe 4 through a flange 6, the flange 5 is fixed through a bolt 7, the flange 6 is fixed through a bolt 8, the shell is a cavity shell 9, the electric heating active regeneration system 2 consists of the cavity shell 9, an electric heating device 10, biphenyl and biphenyl ether low-melting mixture type heat conduction oil 11, the cavity shell 9 is a hollow pipe with an interlayer, an inner hole of the hollow pipe is attached to the outer surface of a cylinder of the filter body 1, the biphenyl and biphenyl ether low-melting mixture type heat conduction oil 11 is injected into the bottom of the interlayer of the hollow pipe, and the electric heating device 10 is arranged at the bottom of the interlayer of the cavity shell 9.
The filter body 1 is composed of a particle catcher filter body.
The air inlet pipe 3 is provided with an air inlet temperature sensor 141 and an air inlet pressure sensor 151, and the air outlet pipe 4 is provided with an air outlet temperature sensor 142 and an air outlet pressure sensor 152.
A gasket 13 made of tinfoil paper is arranged between the inner hole of the cavity shell 9 and the outer surface of the cylinder of the filter body 1.
The outer surface of the cavity shell 9 is provided with a heat-insulating layer 16 made of composite silicate heat-insulating materials.
The cavity housing 9 is provided with a safety device 12, which contains a temperature control device.
The electric heating device 10 is provided with a heating module and a heat preservation module, wherein the power of the heat preservation module is 1/5 of that of the heating module.
A control method of an active regeneration particle catcher, comprising the following steps:
(1) When the difference between the inlet pressure sensor 151 and the outlet pressure sensor 152 is greater than or equal to 20kPa, the heating module in the electric heating device 10 is powered on to heat the biphenyl and biphenyl ether low melting mixture type heat conducting oil 11, and the heat of the biphenyl and biphenyl ether low melting mixture type heat conducting oil 11 is conducted to the filter body 1 through the cavity housing 9, so that the temperature of the filter body 1 is increased;
(2) Measuring the temperature values of the air inlet temperature sensor 141 and the air outlet temperature sensor 142 while heating the heating module in the electric heating device 10, and when the average value of the temperature values measured by the air inlet temperature sensor 141 and the air outlet temperature sensor 142 respectively reaches 380 ℃, cutting off the power supply of the heating module in the electric heating device 10, switching on the power supply of the heat preservation module in the electric heating device 10, and preserving the heat of the biphenyl and biphenyl ether low-melting mixture type heat conduction oil 11 by the heat preservation module;
(3) When the temperature average value shown by the air inlet temperature sensor 141 and the air outlet temperature sensor 142 is lower than 340 ℃ while the heat preservation module in the electric heating device 10 is preserving heat, the power supply of the heat preservation module in the electric heating device 10 is cut off, the power supply of the heating module in the electric heating device 10 is turned on, and the biphenyl and biphenyl ether low-melting mixture type heat conduction oil 11 is reheated;
(4) When the heating module in the electric heating device 10 heats and the temperature of the biphenyl and biphenyl ether low-melting mixture type heat conduction oil 11 reaches 410 ℃, the safety device 12 is started, the power supply is cut off, and the electric heating device 10 stops working;
(5) When the difference between the intake pressure sensor 151 and the output pressure sensor 152 is less than 10kPa while the power supply of the heating module or the heat-preserving module in the electric heating apparatus 10 is turned on, the power supply of the heating module and the heat-preserving module of the electric heating apparatus 10 is turned off, and the electric heating apparatus 10 stops operating.
Example 2
Referring to fig. 3 and 4, the active regeneration particle catcher comprises a shell, a filter body 1, an electric heating active regeneration system 2, an air inlet pipe 3 and an air outlet pipe 4, wherein the front end of the shell is communicated with the air inlet pipe 3 through a flange 5, the rear end of the shell is communicated with the air outlet pipe 4 through a flange 6, the flange 5 is fixed through a bolt 7, the flange 6 is fixed through a bolt 8, the shell is a cavity shell 9, the electric heating active regeneration system 2 consists of the cavity shell 9, an electric heating device 10, biphenyl and biphenyl ether low-melting mixture type heat conduction oil 11, the cavity shell 9 is a hollow pipe with an interlayer, an inner hole of the hollow pipe is attached to the outer surface of a cylinder of the filter body 1, the biphenyl and biphenyl ether low-melting mixture type heat conduction oil 11 is injected into the bottom of the interlayer of the hollow pipe, and the electric heating device 10 is arranged at the bottom of the interlayer of the cavity shell 9.
The cavity shell 9 is communicated with a protruding cavity 91 towards one end of the air inlet pipe 3, and the protruding cavity 91 is a pipe body with an interlayer.
The protruding cavity 91 is arranged at the front end of the filter body 1 and can extend into the pipe orifice of the air inlet pipe 3, a layer of heat insulation layer made of alumina polycrystalline cellucotton is arranged on the contact surface of the protruding cavity 91 and the pipe orifice, heat loss of the protruding cavity is reduced, the length of the protruding cavity 91 extending out of the front end of the filter body 1 is 1.5 times of the maximum overcurrent diameter of the filter body 1, and when the temperature in the cavity shell 9 reaches 380 ℃, the protruding cavity 91 can raise the air inlet temperature and the temperature of the front end of the filter body 1 to 350 ℃.
The minimum inner hole diameter of the protruding cavity 91 pipe body is larger than the inner diameter of the air inlet pipe 3, and the maximum inner hole diameter of the protruding cavity 91 pipe body is equal to the maximum overflow diameter of the filter body 1, so that the entering amount of tail gas is increased, the flow speed of the tail gas is accelerated, and the regeneration efficiency is improved. With reference to fig. 3 and 4, the aperture of the taper hole at the front end of the protruding cavity can be changed into the aperture of the straight hole.
The filter body 1 is composed of a particle catcher filter body.
An air inlet pipe 3 at the front end of the cavity shell 9 is provided with an air inlet temperature sensor 141 and an air inlet pressure sensor 151, and the air outlet pipe 4 is provided with an air outlet temperature sensor 142 and an air outlet pressure sensor 152.
A gasket 13 made of aluminum plates is arranged between the inner hole of the cavity shell 9 and the outer surface of the column body of the filter body 1.
An insulating layer 16 made of alumina polycrystalline cellucotton is arranged on the outer surface of the cavity shell 9.
The cavity housing 9 is provided with a safety device 12, which contains a temperature control device.
The electric heating device 10 is provided with a heating module and a heat preservation module, wherein the power of the heat preservation module is 1/4 of that of the heating module.
A control method of an active regeneration particle catcher, comprising the following steps:
(1) When the difference between the inlet pressure sensor 151 and the outlet pressure sensor 152 is greater than or equal to 30kPa, the heating module in the electric heating device 10 is powered on to heat the biphenyl and biphenyl ether low melting mixture type heat conducting oil 11, and the heat of the biphenyl and biphenyl ether low melting mixture type heat conducting oil 11 is conducted to the filter body 1 through the cavity housing 9, so that the temperature of the filter body 1 is increased;
(2) Measuring the temperature values of the air inlet temperature sensor 141 and the air outlet temperature sensor 142 while heating the heating module in the electric heating device 10, and when the average value of the temperature values measured by the air inlet temperature sensor 141 and the air outlet temperature sensor 142 respectively reaches 370 ℃, cutting off the power supply of the heating module in the electric heating device 10, switching on the power supply of the heat preservation module in the electric heating device 10, and preserving the heat of the biphenyl and biphenyl ether low-melting mixture type heat conduction oil 11 by the heat preservation module;
(3) When the temperature average value shown by the air inlet temperature sensor 141 and the air outlet temperature sensor 142 is lower than 340 ℃ while the heat preservation module in the electric heating device 10 is preserving heat, the power supply of the heat preservation module in the electric heating device 10 is cut off, the power supply of the heating module in the electric heating device 10 is turned on, and the biphenyl and biphenyl ether low-melting mixture type heat conduction oil 11 is reheated;
(4) When the heating module in the electric heating device 10 heats and the temperature of the biphenyl and biphenyl ether low-melting mixture type heat conduction oil 11 reaches 410 ℃, the safety device 12 is started, the power supply is cut off, and the electric heating device 10 stops working;
(5) When the difference between the intake pressure sensor 151 and the output pressure sensor 152 is less than 15kPa while the power supply of the heating module or the heat-preserving module in the electric heating apparatus 10 is turned on, the power supply of the heating module and the heat-preserving module of the electric heating apparatus 10 is turned off, and the electric heating apparatus 10 stops operating.
Example 3
Referring to fig. 2 and 5, the active regeneration particle catcher comprises a shell, a filter body 1, an electric heating active regeneration system 2, an air inlet pipe 3 and an air outlet pipe 4, wherein the front end of the shell is communicated with the air inlet pipe 3 through a flange 5, the rear end of the shell is communicated with the air outlet pipe 4 through a flange 6, the flange 5 is fixed through a bolt 7, the flange 6 is fixed through a bolt 8, the shell is a cavity shell 9, the electric heating active regeneration system 2 consists of the cavity shell 9, an electric heating device 10, biphenyl and biphenyl ether low-melting mixture type heat conduction oil 11, the cavity shell 9 is a hollow pipe with an interlayer, the inner hole of the hollow pipe is attached to the outer surfaces of cylinders of the particle catcher filter body 1 and a catalytic oxidizer 17, the inner bottom of the interlayer of the hollow pipe is filled with biphenyl and biphenyl ether low-melting mixture type heat conduction oil 11, and the electric heating device 10 is arranged at the bottom of the interlayer of the cavity shell 9.
The filter body 1 is composed of a particle catcher filter body 1a and an oxidation catalyst carrier 1b, wherein the interval between the particle catcher filter body 1a and the oxidation catalyst carrier 1b is 10mm, the oxidation catalyst carrier 1b is arranged at one end, close to the air inlet pipe 3, in the cavity shell 9, and the particle catcher filter body 1a is arranged at one end, close to the air outlet pipe 4, in the cavity shell 9.
The air inlet pipe 3 is provided with an air inlet temperature sensor 141 and an air inlet pressure sensor 151, and the air outlet pipe 4 is provided with an air outlet temperature sensor 142 and an air outlet pressure sensor 152.
A gasket 13 made of tinfoil paper is arranged between the inner hole of the cavity shell 9 and the outer surface of the cylinder of the filter body 1.
The outer surface of the cavity shell 9 is provided with a heat-insulating layer 16 made of composite silicate heat-insulating materials.
The cavity housing 9 is provided with a safety device 12, which contains a temperature control device.
The electric heating device 10 is provided with a heating module and a heat preservation module, wherein the power of the heat preservation module is 1/5 of that of the heating module.
The structure forms the active regeneration catalytic oxidation particle catcher.
A control method of an active regeneration particle catcher, comprising the following steps:
(1) When the difference between the inlet pressure sensor 151 and the outlet pressure sensor 152 is greater than or equal to 25kPa, the heating module in the electric heating device 10 is powered on to heat the biphenyl and biphenyl ether low melting mixture type heat conducting oil 11, and the heat of the biphenyl and biphenyl ether low melting mixture type heat conducting oil 11 is conducted to the particle catcher filter body 1 and the oxidation catalyst 17 through the cavity housing 9, so that the temperatures of the particle catcher filter body 1 and the oxidation catalyst 17 are raised;
(2) Measuring the temperature values of the air inlet temperature sensor 141 and the air outlet temperature sensor 142 while heating the heating module in the electric heating device 10, and when the average value of the temperature values measured by the air inlet temperature sensor 141 and the air outlet temperature sensor 142 respectively reaches 360 ℃, cutting off the power supply of the heating module in the electric heating device 10, switching on the power supply of the heat preservation module in the electric heating device 10, and preserving the heat of the biphenyl and biphenyl ether low-melting mixture type heat conduction oil 11 by the heat preservation module;
(3) When the temperature average value shown by the air inlet temperature sensor 141 and the air outlet temperature sensor 142 is lower than 340 ℃ while the heat preservation module in the electric heating device 10 is preserving heat, the power supply of the heat preservation module in the electric heating device 10 is cut off, the power supply of the heating module in the electric heating device 10 is turned on, and the biphenyl and biphenyl ether low-melting mixture type heat conduction oil 11 is reheated;
(4) When the heating module in the electric heating device 10 heats and the temperature of the biphenyl and biphenyl ether low-melting mixture type heat conduction oil 11 reaches 410 ℃, the safety device 12 is started, the power supply is cut off, and the electric heating device 10 stops working;
(5) When the difference between the intake pressure sensor 151 and the output pressure sensor 152 is less than 5kPa while the power supply of the heating module or the heat-preserving module in the electric heating apparatus 10 is turned on, the power supply of the heating module and the heat-preserving module of the electric heating apparatus 10 is turned off, and the electric heating apparatus 10 stops operating.
Example 4
Referring to fig. 4 and 6, the active regeneration particle catcher comprises a shell, a filter body 1, an electric heating active regeneration system 2, an air inlet pipe 3 and an air outlet pipe 4, wherein the front end of the shell is communicated with the air inlet pipe 3 through a flange 5, the rear end of the shell is communicated with the air outlet pipe 4 through a flange 6, the flange 5 is fixed through a bolt 7, the flange 6 is fixed through a bolt 8, the shell is a cavity shell 9, the electric heating active regeneration system 2 consists of the cavity shell 9, an electric heating device 10, biphenyl and biphenyl ether low-melting mixture type heat conduction oil 11, the cavity shell 9 is a hollow pipe with an interlayer, the inner hole of the hollow pipe is attached to the outer surfaces of cylinders of the particle catcher filter body 1 and a catalytic oxidizer 17, the inner bottom of the interlayer of the hollow pipe is filled with biphenyl and biphenyl ether low-melting mixture type heat conduction oil 11, and the electric heating device 10 is arranged at the bottom of the interlayer of the cavity shell 9.
The cavity shell 9 is communicated with a protruding cavity 91 towards one end of the air inlet pipe 3, and the protruding cavity 91 is a pipe body with an interlayer.
The protruding cavity 91 is arranged at the front end of the oxidation catalyst 17 and can extend into the pipe orifice of the air inlet pipe 3, a layer of heat insulation layer made of alumina polycrystalline cellucotton is arranged on the contact surface of the protruding cavity 91 and the pipe orifice, heat loss of the protruding cavity is reduced, the length of the protruding cavity 91 extending out of the front end of the filter body 1 is 1.5 times of the maximum overcurrent diameter of the filter body 1, and when the temperature in the cavity shell 9 reaches 378 ℃, the protruding cavity 91 can raise the air inlet temperature and the temperature of the front end of the filter body 1 to 350 ℃.
The minimum inner hole diameter of the protruding cavity 91 body is equal to the inner diameter of the air inlet pipe 3, and the maximum inner hole diameter of the protruding cavity 91 body is equal to the maximum overflow diameter of the filter body 1, so that the entering amount of tail gas is increased, the flow speed of the tail gas is accelerated, and the regeneration efficiency is improved.
The filter body 1 is composed of a particle catcher filter body 1a or a particle catcher filter body 1a and an oxidation catalyst carrier 1b, wherein the interval between the particle catcher filter body 1a and the oxidation catalyst carrier 1b is 100mm, the oxidation catalyst carrier 1b is arranged at one end, close to the air inlet pipe 3, in the cavity shell 9, and the particle catcher filter body 1a is arranged at one end, close to the air outlet pipe 4, in the cavity shell 9.
An air inlet pipe 3 at the front end of the cavity shell 9 is provided with an air inlet temperature sensor 141 and an air inlet pressure sensor 151, and the air outlet pipe 4 is provided with an air outlet temperature sensor 142 and an air outlet pressure sensor 152.
A gasket 13 made of aluminum plates is arranged between the inner hole of the cavity shell 9 and the outer surface of the column body of the filter body 1.
An insulating layer 16 made of alumina polycrystalline cellucotton is arranged on the outer surface of the cavity shell 9.
The cavity housing 9 is provided with a safety device 12, which contains a temperature control device.
The electric heating device 10 is provided with a heating module and a heat preservation module, wherein the power of the heat preservation module is 1/4 of that of the heating module.
The structure forms the active regeneration catalytic oxidation particle catcher.
A control method of an active regeneration particle catcher, comprising the following steps:
(1) When the difference between the inlet pressure sensor 151 and the outlet pressure sensor 152 is greater than or equal to 25kPa, the heating module in the electric heating device 10 is powered on to heat the biphenyl and biphenyl ether low melting mixture type heat conducting oil 11, and the heat of the biphenyl and biphenyl ether low melting mixture type heat conducting oil 11 is conducted to the particle catcher filter body 1 and the oxidation catalyst 17 through the cavity housing 9, so that the temperatures of the particle catcher filter body 1 and the oxidation catalyst 17 are raised;
(2) Measuring the temperature values of the air inlet temperature sensor 141 and the air outlet temperature sensor 142 while heating the heating module in the electric heating device 10, and when the average value of the temperature values measured by the air inlet temperature sensor 141 and the air outlet temperature sensor 142 respectively reaches 378 ℃, cutting off the power supply of the heating module in the electric heating device 10, switching on the power supply of the heat preservation module in the electric heating device 10, and preserving the heat of the biphenyl and biphenyl ether low-melting mixture type heat conduction oil 11 by the heat preservation module;
(3) When the temperature average value shown by the air inlet temperature sensor 141 and the air outlet temperature sensor 142 is lower than 340 ℃ while the heat preservation module in the electric heating device 10 is preserving heat, the power supply of the heat preservation module in the electric heating device 10 is cut off, the power supply of the heating module in the electric heating device 10 is turned on, and the biphenyl and biphenyl ether low-melting mixture type heat conduction oil 11 is reheated;
(4) When the heating module in the electric heating device 10 heats and the temperature of the biphenyl and biphenyl ether low-melting mixture type heat conduction oil 11 reaches 410 ℃, the safety device 12 is started, the power supply is cut off, and the electric heating device 10 stops working;
(5) When the difference between the intake pressure sensor 151 and the output pressure sensor 152 is less than 8kPa while the power supply of the heating module or the heat-preserving module in the electric heating apparatus 10 is turned on, the power supply of the heating module and the heat-preserving module of the electric heating apparatus 10 is turned off, and the electric heating apparatus 10 stops operating.
The invention solves the problems that the regeneration of the particulate matters depends on the working condition of the engine, the temperature of the particulate trap cannot be maintained at the optimal constant value regeneration temperature, and the active regeneration device needs additional arrangement space, is uniformly heated, and cannot influence the regeneration of the particulate trap due to the temperature gradient.
Claims (7)
1. The utility model provides a control method of initiative regeneration particle trap, initiative regeneration particle trap includes casing, filter body (1), electrical heating initiative regeneration system (2), intake pipe (3), outlet duct (4), the front end of filter body (1) is linked together with intake pipe (3), and the rear end of filter body (1) is linked together with outlet duct (4), its characterized in that:
the shell is a cavity shell (9), the electric heating active regeneration system (2) consists of the cavity shell (9), an electric heating device (10) and heat conduction liquid (11), the cavity shell (9) is a hollow pipe with an interlayer, an inner hole of the hollow pipe is attached to the outer surface of a column body of the filter body (1), the heat conduction liquid (11) is injected into the bottom of the interlayer of the hollow pipe, and the electric heating device (10) is arranged at the bottom of the interlayer of the cavity shell (9);
an air inlet pipe (3) at the front end of the cavity shell (9) is provided with an air inlet temperature sensor (141) and an air inlet pressure sensor (151), and an air outlet pipe (4) is provided with an air outlet temperature sensor (142) and an air outlet pressure sensor (152);
the electric heating device (10) is internally provided with a heating module and a heat preservation module;
the control method comprises the following steps:
(1) When the difference value between the air inlet pressure sensor (151) and the air outlet pressure sensor (152) is larger than or equal to 20kPa-30kPa, a heating module in the electric heating device (10) is powered on to heat the heat conducting liquid (11), and the heat of the heat conducting liquid (11) is conducted to the filter body (1) through the cavity shell (9) to raise the temperature of the filter body (1);
(2) The temperature values of the air inlet temperature sensor (141) and the air outlet temperature sensor (142) are measured while the heating module in the electric heating device (10) heats, when the average value of the temperature values respectively measured by the air inlet temperature sensor (141) and the air outlet temperature sensor (142) reaches 10-30 ℃ above the regeneration temperature, the power supply of the heating module in the electric heating device (10) is cut off, the power supply of the heat preservation module in the electric heating device (10) is connected, and the heat conduction liquid (11) is preserved by the heat preservation module;
(3) When the temperature average value shown by the air inlet temperature sensor (141) and the air outlet temperature sensor (142) is lower than the regeneration temperature by 10 ℃ below the regeneration temperature while the heat preservation module in the electric heating device (10) is preserving heat, the power supply of the heat preservation module in the electric heating device (10) is cut off, the power supply of the heating module in the electric heating device (10) is switched on, and the heat conduction liquid (11) is reheated;
(4) When the heating module in the electric heating device (10) heats, the safety device (12) is started and the power supply is cut off when the temperature of the heat conduction liquid (11) reaches the highest use temperature of the heat conduction liquid, and the electric heating device (10) stops working;
(5) When the difference between the air inlet pressure sensor (151) and the air outlet pressure sensor (152) is smaller than 5kPa-15kPa while the power supply of the heating module or the heat preservation module in the electric heating device (10) is connected, the power supply of the heating module and the heat preservation module of the electric heating device (10) is cut off, and the electric heating device (10) stops working.
2. The method for controlling an active regeneration particle catcher according to claim 1, characterized in that: one end of the cavity shell (9) facing the air inlet pipe (3) is communicated with a protruding cavity part (91), and the protruding cavity part (91) is a pipe body with an interlayer.
3. The method for controlling an active regeneration particle catcher according to claim 2, characterized in that: the protruding cavity part (91) is arranged at the front end of the filter body (1) and can extend into the pipe orifice of the air inlet pipe (3), and the length of the protruding cavity part (91) extending out of the front end of the filter body (1) is 2/5-2 times of the maximum overcurrent diameter of the filter body (1).
4. A control method of an active regeneration particle catcher according to claim 2 or 3, characterized in that: the minimum inner hole diameter of the pipe body of the protruding cavity part (91) is larger than or equal to the inner diameter of the air inlet pipe (3), and the maximum inner hole diameter of the pipe body of the protruding cavity part (91) is equal to the maximum overcurrent diameter of the filter body (1).
5. The method for controlling an active regeneration particle catcher according to claim 1, characterized in that: the filter body (1) is composed of a particle catcher filter body (1 a) or a particle catcher filter body (1 a) and an oxidation catalyst carrier (1 b), wherein the interval between the particle catcher filter body (1 a) and the oxidation catalyst carrier (1 b) is 10-100mm, the oxidation catalyst carrier (1 b) is arranged at one end, close to an air inlet pipe (3), in a cavity shell (9), and the particle catcher filter body (1 a) is arranged at one end, close to an air outlet pipe (4), in the cavity shell (9).
6. The method for controlling an active regeneration particle catcher according to claim 1, characterized in that: a liner (13) made of a heat conducting material is arranged between an inner hole of the cavity shell (9) and the outer surface of the column body of the filter body (1), and an insulating layer (16) is arranged on the outer surface of the cavity shell (9).
7. The method for controlling an active regeneration particle catcher according to claim 1, characterized in that: the cavity shell (9) is provided with a safety device (12).
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| CN110735690A (en) * | 2019-10-24 | 2020-01-31 | 凯龙高科技股份有限公司 | high-temperature maintenance device for electrically heated particle catcher |
| US11466603B2 (en) * | 2020-05-29 | 2022-10-11 | Lokar, Inc. | Faux ignition coil crankcase breather |
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| US4662911A (en) * | 1982-03-18 | 1987-05-05 | Nippondenso Co., Ltd. | Equipment for trapping particulates in engine exhaust gas |
| JPH07180530A (en) * | 1993-12-24 | 1995-07-18 | Aqueous Res:Kk | Exhaust emission control device |
| JPH10121942A (en) * | 1996-10-22 | 1998-05-12 | Sumitomo Electric Ind Ltd | Regenerating heater of particulate trapping for diesel engine and particulate trapping for diesel engine using the heater |
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