CN111852621B - Electric heating regeneration type diesel particulate matter purifier - Google Patents
Electric heating regeneration type diesel particulate matter purifier Download PDFInfo
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- CN111852621B CN111852621B CN202010558617.0A CN202010558617A CN111852621B CN 111852621 B CN111852621 B CN 111852621B CN 202010558617 A CN202010558617 A CN 202010558617A CN 111852621 B CN111852621 B CN 111852621B
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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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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D46/00—Filters or filtering processes specially modified for separating dispersed particles from gases or vapours
- B01D46/24—Particle separators, e.g. dust precipitators, using rigid hollow filter bodies
- B01D46/2403—Particle separators, e.g. dust precipitators, using rigid hollow filter bodies characterised by the physical shape or structure of the filtering element
- B01D46/2411—Filter cartridges
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D46/00—Filters or filtering processes specially modified for separating dispersed particles from gases or vapours
- B01D46/42—Auxiliary equipment or operation thereof
- B01D46/4263—Means for active heating or cooling
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D46/00—Filters or filtering processes specially modified for separating dispersed particles from gases or vapours
- B01D46/42—Auxiliary equipment or operation thereof
- B01D46/44—Auxiliary equipment or operation thereof controlling filtration
- B01D46/446—Auxiliary equipment or operation thereof controlling filtration by pressure measuring
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D46/00—Filters or filtering processes specially modified for separating dispersed particles from gases or vapours
- B01D46/42—Auxiliary equipment or operation thereof
- B01D46/44—Auxiliary equipment or operation thereof controlling filtration
- B01D46/448—Auxiliary equipment or operation thereof controlling filtration by temperature measuring
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D46/00—Filters or filtering processes specially modified for separating dispersed particles from gases or vapours
- B01D46/66—Regeneration of the filtering material or filter elements inside the filter
- B01D46/80—Chemical processes for the removal of the retained particles, e.g. by burning
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D46/00—Filters or filtering processes specially modified for separating dispersed particles from gases or vapours
- B01D46/66—Regeneration of the filtering material or filter elements inside the filter
- B01D46/80—Chemical processes for the removal of the retained particles, e.g. by burning
- B01D46/84—Chemical processes for the removal of the retained particles, e.g. by burning by heating only
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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
- F01N13/18—Construction facilitating manufacture, assembly, or disassembly
- F01N13/1888—Construction facilitating manufacture, assembly, or disassembly the housing of the assembly consisting of two or more parts, e.g. two half-shells
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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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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2258/00—Sources of waste gases
- B01D2258/01—Engine exhaust gases
- B01D2258/012—Diesel engines and lean burn gasoline engines
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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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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Geometry (AREA)
- Processes For Solid Components From Exhaust (AREA)
Abstract
The invention provides an electric heating regenerative diesel particulate purifier which comprises a shell, a filter element assembly and an electric heating assembly, wherein the filter element assembly and the electric heating assembly are axially arranged in a staggered mode and are arranged in the shell.
Description
Technical Field
The invention relates to the field of tail gas purification treatment, in particular to a diesel engine tail gas purifier.
Background
A Diesel Particulate Filter (DPF) is a Filter installed in an exhaust system of a Diesel engine, and traps carbon Particulate emissions in a free state before the emissions enter the atmosphere.
The DPF can effectively reduce emission of particulate matter. However, during long-term operation of a DPF, the particulate matter in the trap increases gradually, which can raise the engine exhaust back pressure and ultimately lead to reduced engine performance. The deposited particulate matter is periodically removed to restore the filtering performance of the DPF. This requires the DPF to be additionally equipped with a regeneration function. Regeneration refers to the use of external energy to raise the temperature inside the DPF to ignite and burn the trapped particulate matter. When the temperature in the DPF reaches 550 ℃, the deposited particulate matter will be oxidized and burned, and if the temperature does not reach 550 ℃, excessive deposits will block the DPF, and then an external energy source (such as an electric heater, a burner or a change of the engine operating conditions) is needed to increase the temperature in the DPF to oxidize and burn the particulate matter, and finally, the effect of cyclic regeneration is achieved.
Disclosure of Invention
The invention aims to provide an electric heating regenerative diesel particulate matter purifier which can effectively purify particulate matter components in diesel engine exhaust in a capture mode.
Another objective of the present invention is to provide an electrically heated regenerative diesel particulate filter, which performs a regeneration cycle on particulate matter remaining on a filter element inside the filter in an electrically heated oxidative combustion manner, so as to increase the service life of the equipment.
The invention also aims to provide the electric heating regenerative diesel particulate filter, which realizes automatic management on the starting, stopping and heat efficiency control of the electric heater so as to achieve the aim of reducing the manual maintenance cost.
In order to achieve at least one of the above objects, the present invention provides an electrically heated regenerative diesel particulate filter, including a housing, a filter element assembly, and an electrical heating assembly, the filter element assembly and the electrical heating assembly being arranged in a staggered manner in an axial direction and being disposed inside the housing.
In some embodiments, wherein the housing includes a removable cover, the filter cartridge assembly, and the heating assembly are combined into a single module that can be removed and replaced from the housing.
In some embodiments, the housing includes a casing, a front end sealing head and a rear end sealing head, the front end sealing head is located at an air inlet end of the electrical heating regenerative diesel particulate filter and connected with the casing in a welded manner, the rear end sealing head is located at an air outlet end of the electrical heating regenerative diesel particulate filter and connected with the detachable cover plate in a welded manner, the casing includes a package, a lining, and a casing insulating layer, an inner surface of the lining is coated with a heat reflective coating, and the casing insulating layer is disposed between the package and the lining.
In some embodiments, the detachable cover plate is provided with a cover plate main body coated with a heat reflective coating and internally provided with a cover plate heat insulation layer, wherein the case heat insulation layer of the case and the cover plate heat insulation layer of the detachable cover plate are made of materials mainly containing alumina silicate fibers.
In some embodiments, the housing is made of high temperature resistant steel, the insulating layer of the housing wraps the outer surface of the lining or is disposed on the outer surface of the package of the housing, the housing further includes a housing connecting flange, the cover plate main body is connected with the housing connecting flange through bolts and nuts, a joint is sealed by a metal gasket, the heating assembly is further provided with an electrode terminal, the electrode terminal is penetrated into the rear end seal head, the rear end seal head includes an exhaust pipe and a sensor interface, the electrode terminal is penetrated into the exhaust pipe, and the sensor interface is connected to the exhaust pipe in a welding manner for connecting an external pressure sensor or a temperature sensor.
In some embodiments, wherein the shell still includes inside the subassembly of strengthening, can dismantle for the apron bolt and nut with the casing is connected, inside strengthen the subassembly with can dismantle the apron and connect with the welding form, inside strengthen the subassembly with gap between the heating element is with high temperature resistant inorganic glue thermosetting filling or welding, can dismantle the apron with gap between the heating element is with high temperature resistant inorganic glue thermosetting filling or welding, filter element group spare with the joint gap between the electrical heating element is through high temperature resistant inorganic glue thermosetting filling or welding, the casing with can dismantle the apron and form closed cavity.
In some embodiments, the internal reinforcement assembly comprises a position-limiting sealing plate, a plurality of longitudinal reinforcing ribs and at least two annular hoops, wherein one end of each of the longitudinal reinforcing ribs is uniformly distributed on the outer edge of the position-limiting sealing plate and extends perpendicularly outwards and longitudinally to the detachable cover plate, and the other end of each of the longitudinal reinforcing ribs is connected with the detachable cover plate in a welding manner, wherein each of the annular hoops is parallel to the position-limiting sealing plate and is connected with each of the longitudinal reinforcing ribs in a welding manner, and wherein the filter element assembly and the electric heating assembly are arranged in a cavity formed by the position-limiting sealing plate, the longitudinal reinforcing ribs and the annular hoops of the internal reinforcement assembly.
In some embodiments, the filter element assembly comprises a metal sintered filter element and a mesh tube, wherein the metal sintered filter element is made of a metal fiber sintered felt made of iron-chromium-aluminum, and is formed by a bending and pressure welding process to form a star-shaped folded structure, and the mesh tube is nested inside the metal sintered filter element.
In some embodiments, the electric heating assembly includes at least two ceramic heating plates, each of the ceramic heating plates is electrically connected in parallel, the inner portion of each of the ceramic heating plates is a spiral resistance wire, and the outer shell is made of high temperature resistant ceramic, wherein each of the ceramic heating plates adopts a flat disc structure, and the resistance wires are arranged in a compact structure while the heat radiation surface is increased.
In some embodiments, each of the ceramic heating plates is connected in parallel by a high temperature resistant pure nickel core wire, and the high temperature resistant pure nickel core wire is wrapped by a high temperature resistant ceramic wire tube, so as to enhance mechanical strength and prevent electric leakage, wherein the high temperature resistant ceramic wire tube is fixed on the inner wall of the filter element assembly by a U-shaped spot welding manner, an electrode connecting terminal of the high temperature resistant pure nickel core wire is made of high temperature resistant ceramic, wherein two adjacent ceramic heating plates of the heating assembly are overlapped by heat radiation of the ceramic heating plates, so that the filter element assembly is heated to 600 ℃ or above in an accelerated manner, wherein the heating electrical assembly is powered by 220V or 380V, and an electrical switch is located in a control box or a control cabinet outside the electrical heating regenerative diesel particulate matter purifier.
Drawings
FIG. 1 is a schematic perspective view of an electrically heated regenerative diesel particulate purifier according to a preferred embodiment of the present invention.
Fig. 2 is an exploded view of the electrically heated regenerative diesel particulate purifier according to the above preferred embodiment of the present invention.
Fig. 3 is an exploded view of the electrically heated regenerative diesel particulate purifier according to the above preferred embodiment of the present invention.
Fig. 4 is an exploded view of the electrically heated regenerative diesel particulate purifier according to the above preferred embodiment of the present invention.
Fig. 5 is an exploded view of the electrically heated regenerative diesel particulate purifier according to the above preferred embodiment of the present invention.
Detailed Description
The following description is provided to disclose the invention so as to enable any person skilled in the art to practice the invention. The preferred embodiments described below are by way of example only, and other obvious variations will occur to those skilled in the art. The underlying principles of the invention, as defined in the following description, may be applied to other embodiments, variations, modifications, equivalents, and other technical solutions without departing from the spirit and scope of the invention.
It will be understood by those skilled in the art that in the present disclosure, the terms "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," and the like are used in an orientation or positional relationship indicated in the drawings for ease of description and simplicity of description, and do not indicate or imply that the referenced devices or components must be constructed and operated in a particular orientation and thus are not to be considered limiting.
Fig. 1 to 5 show an electrically heated regenerative diesel particulate filter according to a preferred embodiment of the present invention. The electric heating regeneration type diesel engine particulate matter purifier can effectively purify particulate matter components in the diesel engine tail gas in a capture mode, can regenerate and circulate the particulate matter remaining on the filter element in the purifier in an electric heating oxidation combustion mode, prolongs the service life of equipment, and avoids the trouble of frequently cleaning or replacing the blocked filter element. The starting and stopping of the electric heater can be realized, the automatic management of the heat efficiency control is realized, and the manual maintenance cost is reduced.
Specifically, the electrically heated regenerative diesel particulate purifier includes a housing 100, a cartridge assembly 200, and an electrical heating assembly 300. The filter cartridge assembly 200 and the electrical heating assembly 300 are disposed inside the housing 100. The filter element assembly 200 and the electric heating assembly 300 are arranged along the axial direction in a staggered mode, and a connecting gap between the filter element assembly 200 and the electric heating assembly 300 is filled by high-temperature-resistant inorganic adhesive in a thermosetting mode to form a combined body so as to prevent air leakage. The combination of the filter element assembly 200 and the electric heating assembly 300 is limited by the internal structure of the housing 100, preventing deformation and displacement. Preferably, in this preferred embodiment of the present invention, the internal structure of the housing 100 for limiting as described above is implemented as an internal reinforcing member 150. The internal reinforcing assembly 150 has a limiting cavity, and the combination of the filter element assembly 200 and the electric heating assembly 300 is limited in the limiting cavity, so that the position of the heat radiation source is stabilized when the electric heating regenerative diesel particulate filter works.
More specifically, the housing 100 includes a shell 110, a front end cap 120, a removable cover plate 130, a rear end cap 140, and the internal reinforcement assembly 150. The electric heating regeneration type diesel particulate matter purifier provided by the invention is provided with an air inlet end and an air outlet end. The front end socket 120 is located at an air inlet end of the electrically heated regenerative diesel particulate filter of the present invention, and is connected to the housing 110 in a welded manner. The rear end sealing head 140 is located at the air outlet end of the electrically heated regenerative diesel particulate filter of the present invention, and is connected to the detachable cover plate 130 in a welded manner, the detachable cover plate 130 is connected to the housing 110 by bolts and nuts, the internal reinforcing member 150 is connected to the detachable cover plate 130 in a welded manner, a gap between the internal reinforcing member 150 and the heating member 300 is filled with a high temperature resistant inorganic adhesive through thermosetting, and a gap between the detachable cover plate 130 and the heating member 300 is filled with a high temperature resistant inorganic adhesive through thermosetting.
Further, the housing 110 includes a package 111, an inner liner 112, and a housing connecting flange 114, and preferably, the material of the housing 110 is selected from high temperature resistant steel materials, such as: stainless steel. The inner surface of the liner 112 is coated with a heat reflective coating to improve the heat utilization efficiency inside the electrically heated regenerative diesel particulate filter space. It should be noted that in other embodiments, the casing 110 further includes a casing insulating layer disposed between the package 111 and the lining 112, and more preferably, the casing insulating layer wraps the outer surface of the lining 112 to further improve the heat utilization efficiency inside the space of the electrically heated regenerative diesel particulate filter. It is understood that in other embodiments, the housing insulation can also be disposed on the outer surface of the enclosure 111.
The detachable cover 130 includes a cover body 131 and a cover connection flange 133. The cover plate main body 131 is coated with a heat reflective paint, and a cover plate heat insulating layer is provided inside. The cover main body 131 is coupled to the housing coupling flange 114 by bolts and nuts, and the coupling is sealed by a metal gasket, so that the housing 110 and the detachable cover 130 are detachably coupled together.
Further, the heating assembly 300 is further provided with an electrode terminal, and the electrode terminal of the heating assembly 300 is inserted into the rear end cap 140. More specifically, the rear end cap 140 includes an exhaust tube 141 and a sensor interface 142. The electrode terminal of the heating assembly 300 is inserted into the exhaust pipe 141. The sensor interface 142 is connected to the exhaust pipe 141 by welding, and is used for connecting an external pressure sensor or a temperature sensor.
Further, the internal reinforcing assembly 150 includes a position-limiting sealing plate 151, a longitudinal reinforcing rib 152 and an annular hoop 153. The limiting closing plate 151, the longitudinal reinforcing rib 152 and the annular hoop 153 are assembled in a welding manner. In this preferred embodiment, four longitudinal reinforcing ribs 152 are provided, one end of each longitudinal reinforcing rib 152 is uniformly distributed on the outer edge of the position-limiting closing plate 151 and vertically extends outwards to the detachable cover plate 130, and the other end of each longitudinal reinforcing rib 152 is connected with the detachable cover plate 130 in a welding manner. It will be appreciated by those skilled in the art that the number of four is merely exemplary, and in other embodiments, other numbers may be provided to enhance the overall structural strength. The annular anchor ear 153 is parallel to the position-limiting closing plate 151 and is connected with each longitudinal reinforcing rib 152 in a welding manner. In this preferred embodiment, the number of the ring-shaped hoops 153 is set to four. Of course, it will be understood by those skilled in the art that the number of four is merely exemplary, and in other embodiments, other numbers may be provided to enhance the overall structural strength.
The filter element assembly 200 and the electric heating assembly 300 are disposed in the cavity formed by the position-limiting sealing plate 151, the longitudinal reinforcing ribs 152 and the annular hoop 153 of the internal reinforcing assembly 150.
Further, filter element group spare 200 includes metal sintering filter core 201 and mesh pipe 202, metal sintering filter core 201 is made by the metal fiber sintering felt of iron chromium aluminium material, through fold ripples and pressure welding technology shaping, when diesel engine tail gas passes through the filter core, the particulate matter can be filtered, then accumulates in the fold structure of filter core. Preferably, the metal sintered filter element 201 forms a star-shaped pleated structure. The mesh pipe 202 is nested inside the metal sintered filter element 201, and can ensure that the metal sintered filter element 201 does not generate structural deformation in high-temperature airflow. The mesh pipe 202 supports the inside of the metal sintering filter element 201, and the metal sintering filter element 201 is guaranteed to be regular in the whole star-shaped folded structure. Preferably, the metal sintered filter element 201 uses metal fibers with a diameter of 22 μm. In this preferred embodiment, the number of the metal sintered filter elements 201 is set to two, and is arranged along the gas flow direction of the diesel exhaust. Of course, it will be understood by those skilled in the art that the two numbers are provided herein by way of example only, and in other embodiments, other numbers may be provided to correspond to different diesel engine displacement and power stages.
Further, the electrical heating assembly 300 includes a plurality of ceramic heating plates, each of which is electrically connected in parallel. The interior of each ceramic heating plate is a spiral resistance wire, and the shell is made of high-temperature-resistant ceramic, so that the structure is simple, and the reliability is high. Preferably, in this preferred embodiment, each ceramic heating plate is connected in parallel by a high-temperature resistant pure nickel core wire, and the high-temperature resistant pure nickel core wire is wrapped by a high-temperature resistant ceramic spool, so as to enhance mechanical strength and prevent electric leakage. Each high-temperature resistant ceramic wire tube is fixed on the inner wall of the mesh tube 202 in a U-shaped buckle spot welding mode. The electrode connecting terminal is made of high-temperature-resistant ceramic. The heating electric assembly 300 can be powered by 220V or 380V, and the electric switch is positioned in a control box or a control cabinet outside the electric heating regenerative diesel particulate filter. In this preferred embodiment of the present invention, the number of the ceramic heating plates is set to three. Of course, it will be understood by those skilled in the art that the number of three is merely exemplary, and in other embodiments, other numbers may be provided to improve thermal efficiency and reduce soot in the filter element.
It should be noted that the detachable cover plate 130, the filter element assembly 200, and the heating assembly 300 are formed as an integral module, which can be detached from and replaced in the housing 100, and has a simple structure, and is easy to manufacture and replace. When the later stage appears metal sintering filter core 201 broke the hole, mechanical structure damages, during the condition such as circuit ageing, can the integration change, sparingly overhauls the cost of labor that produces.
It is worth mentioning that each of the ceramic heating plates of the heating assembly 300 adopts a flat disc structure, so that the heat radiation surface is increased while the resistance wires are arranged in a compact structure. The adjacent two of heating element 300 the heat radiation of ceramic heating plate superpose in filter element subassembly 200, metal sintering filter core 201 can heat up with higher speed, works as fold structure surface temperature on the metal sintering filter core 201 reaches more than 600 ℃, and the oxidation combustion rate of carbon deposit and other particulate matters will increase substantially, and the regeneration cycle begins.
It is worth mentioning that the electric heating regeneration type diesel particulate filter adopts a closed and compact internal structure, which is beneficial to reducing air convection, reducing heat radiation loss and improving electric heat utilization efficiency. Lifting the liner 112 of the housing 110 and the cover body 131 of the removable cover 130 with a heat reflective coating provides about 15% reflection of thermal radiation that further improves the regeneration cycle of the filter cartridge assembly 200. The shell 110 and the detachable cover plate 130 form a closed cavity, and because the heat insulation material with limited thickness can influence the temperature field and the flow state in the cavity in the closed cavity, the heat inertia of the heat insulation material is very strong, and the heat insulation material can play a role of a buffer zone in heat conduction by taking stainless steel as a medium, thereby being beneficial to energy accumulation. The shell insulating layer of the shell 110 and the cover plate heat insulation layer of the detachable cover plate 130 are made of materials mainly containing alumina silicate fibers, so that the heat insulation performance is excellent, the overall heat efficiency of equipment can be further improved, and the energy consumption is reduced.
It is worth mentioning that in order to reduce the daily manual maintenance cost, the electric heating regeneration type diesel particulate filter can realize the automatic control of electric heating, and the function is completed by a control system consisting of a differential pressure sensor, a temperature sensor, a singlechip and a time relay.
It will be appreciated by persons skilled in the art that the embodiments of the invention described above and shown in the drawings are given by way of example only and are not limiting of the invention. The objects of the present invention have been fully and effectively accomplished. The functional and structural principles of the present invention have been shown and described in the embodiments, and any variations or modifications may be made to the embodiments of the present invention without departing from the principles described.
Claims (11)
1. The utility model provides an electrical heating regeneration type diesel particulate filter which characterized in that, includes shell, filter element group spare and electrical heating element, wherein electrical heating element includes two at least ceramic heating plates, wherein filter element group spare includes metal sintering filter core and mesh pipe, the mesh pipe nested in inside the metal sintering filter core, the metal sintering filter core the mesh pipe with the ceramic heating plate is along axial arrangement with staggered form, and set up in the inside of shell, wherein the shell is including dismantling the apron, can dismantle the apron, filter element group spare, heating element group spare becomes a whole module, can follow dismantle the change in the shell, wherein the shell includes casing, front end head and rear end head, the front end head is located the inlet end of electrical heating regeneration type diesel particulate filter, the shell is connected with the shell in a welding mode, the rear end sealing head is positioned at the air outlet end of the electric heating regeneration type diesel particulate filter and connected with the detachable cover plate in a welding mode, the shell comprises an encapsulation, a lining and a shell heat insulation layer, the inner surface of the lining is coated with heat reflection coating, the shell heat insulation layer is arranged between the encapsulation and the lining, the detachable cover plate is provided with a cover plate main body, the cover plate main body is coated with heat reflection coating, a cover plate heat insulation layer is arranged in the shell, the shell heat insulation layer of the shell and the cover plate heat insulation layer of the detachable cover plate are made of materials mainly containing aluminum silicate fibers, the shell is made of high-temperature resistant steel, the shell heat insulation layer wraps the outer surface of the lining or is arranged on the outer surface of the encapsulation of the shell, wherein the shell further comprises a shell connecting flange, the cover plate main body is connected with the shell connecting flange through bolts and nuts, the joint is sealed by a metal gasket, the shell further comprises an internal reinforcing component, the detachable cover plate is connected with the shell through bolts and nuts, the internal reinforcing component is connected with the detachable cover plate in a welding mode, a gap between the internal reinforcing component and the heating component is filled or welded with a high-temperature-resistant inorganic adhesive thermosetting agent, a gap between the detachable cover plate and the heating component is filled or welded with a high-temperature-resistant inorganic adhesive thermosetting agent, a connecting gap between the filter element component and the electric heating component is filled or welded through a high-temperature-resistant inorganic adhesive thermosetting agent, the shell and the detachable cover plate form a closed cavity, wherein the internal reinforcing component comprises a limiting sealing plate, a plurality of longitudinal reinforcing ribs and at least two annular hoops, wherein one end of each longitudinal reinforcing rib is uniformly distributed on the outer edge of the limiting sealing plate and vertically extends outwards to the detachable cover plate, and the other end of each longitudinal reinforcing rib is connected with the detachable cover plate in a welding manner, wherein each annular hoop is parallel to the limiting sealing plate and is connected with each longitudinal reinforcing rib in a welding manner, and the filter element assembly and the electric heating assembly are arranged in a cavity formed by the limiting sealing plate, the longitudinal reinforcing ribs and the annular hoop of the internal reinforcing assembly.
2. The electrically heated regenerative diesel particulate filter of claim 1, wherein the heating assembly is further provided with an electrode terminal disposed through the back end cap, wherein the back end cap comprises an exhaust pipe and a sensor interface disposed through the exhaust pipe, the sensor interface being connected to the exhaust pipe by welding for connection to an external pressure or temperature sensor.
3. The electrically heated regenerative diesel particulate filter of claim 1, wherein said sintered metal filter element is made of sintered metal fiber felt of iron chromium aluminum, formed by a corrugation and pressure welding process to form a star-shaped pleated structure.
4. The electrically heated regenerative diesel particulate filter of claim 1, 2, or 3, wherein each of said ceramic heating plates is electrically connected in parallel, an interior of each of said ceramic heating plates is a helical resistance wire, and an outer shell is a high temperature resistant ceramic, wherein each of said ceramic heating plates adopts a flat disc structure, and the resistance wires are arranged in a compact structure while increasing a heat radiation surface.
5. The electrically heated regenerative diesel particulate filter of claim 4, wherein each of the ceramic heating plates is connected in parallel by a high temperature resistant pure nickel wire, and the high temperature resistant pure nickel wire is wrapped by a high temperature resistant ceramic wire tube, thereby enhancing mechanical strength and preventing electric leakage, wherein the high temperature resistant ceramic wire tube is fixed on the inner wall of the filter element assembly by means of U-shaped tack welding, wherein the electrode connection terminals of the high temperature resistant pure nickel wire are made of high temperature resistant ceramic, wherein the heat radiation of two adjacent ceramic heating plates of the heating assembly is superposed on the filter element assembly, thereby the filter element assembly is heated up to above 600 ℃ at an accelerated speed, wherein the heating assembly is powered by 220V or 380V, and an electrical switch is located in a control box or a control cabinet outside the electrically heated regenerative diesel particulate filter.
6. The utility model provides an electrical heating regeneration type diesel engine particulate matter clarifier, a serial communication port, including shell, filter element group and electrical heating element, filter element group with electrical heating element arranges along the axial with crisscross form, and set up in the inside of shell, wherein the shell is including dismantling the apron, can dismantle the apron filter element group heating element group becomes a whole module, can follow dismantle the change in the shell, wherein the shell includes casing, front end head and rear end head, the front end head is located electrical heating regeneration type diesel engine particulate matter clarifier's inlet end, with the welding form with the casing is connected, the rear end head is located electrical heating regeneration type diesel engine particulate matter clarifier's the end of giving vent to anger, with the welding form with can dismantle the cover connection, wherein the casing is including encapsulation, a little oily diesel engine particulate matter clarifier's the end of giving vent to anger, Inside lining and casing heat preservation, the internal surface coating of inside lining has heat reflection coating, the casing heat preservation set up in the encapsulation and between the inside lining, wherein can dismantle the apron and be provided with the apron main part, the apron main part coating has heat reflection coating to inside is provided with the apron insulating layer, wherein the casing heat preservation with can dismantle the apron the material that the apron insulating layer adoption used aluminium silicate fiber to be given first place to is, wherein filter element group spare includes metal sintering filter core and mesh pipe, metal sintering filter core is made by the metal fiber sintering felt of iron chromium aluminium material, through the ripples and the shaping of pressure welding technology, forms star type fold structure, the mesh pipe nested in inside the metal sintering filter core.
7. The electrically heated regenerative diesel particulate filter of claim 6, wherein the electrical heating assembly comprises at least two ceramic heating plates, each of the ceramic heating plates being electrically connected in parallel, the interior of each of the ceramic heating plates being a helical resistance wire, the housing being a high temperature resistant ceramic, wherein each of the ceramic heating plates is of a flat disc structure, the resistance wire being arranged in a compact structure while increasing a heat radiation surface.
8. The electrically heated regenerative diesel particulate filter of claim 7, wherein each of the ceramic heating plates is connected in parallel by a high temperature resistant pure nickel wire wrapped by a high temperature resistant ceramic wire tube, so as to enhance mechanical strength and prevent leakage, wherein the high temperature resistant ceramic wire tube is fixed on the inner wall of the filter element assembly by means of U-shaped tack welding, wherein the electrode connection terminal of the high temperature resistant pure nickel wire is made of high temperature resistant ceramic, wherein the heat radiation of two adjacent ceramic heating plates of the heating assembly is superimposed on the filter element assembly, so that the filter element assembly is heated up to above 600 ℃ at an accelerated speed, wherein the heating assembly is powered by 220V or 380V, and the electrical switch is located in a control box or a control cabinet outside the electrically heated regenerative diesel particulate filter.
9. The electrically heated regenerative diesel particulate filter of any one of claims 6 to 8, wherein the housing is made of high temperature resistant steel, wherein the housing insulating layer covers an outer surface of the inner liner or is disposed on an outer surface of the package of the housing, wherein the housing further comprises a housing connecting flange, the cover plate main body is connected to the housing connecting flange by bolts and nuts, a joint is sealed by a metal gasket, wherein the heating assembly is further provided with an electrode terminal inserted into the rear end seal, wherein the rear end seal comprises an exhaust pipe and a sensor interface, the electrode terminal is inserted into the exhaust pipe, and the sensor interface is connected to the exhaust pipe by welding for connecting an external pressure sensor or a temperature sensor.
10. An electrically heated regenerative diesel particulate filter as set forth in any of claims 6 to 8, wherein said housing further comprises an internal reinforcement member, said detachable cover plate is connected to said housing with bolts and nuts, said internal reinforcement member is connected to said detachable cover plate in a welded form, a gap between said internal reinforcement member and said heating member is filled or welded with a thermosetting of a high temperature resistant inorganic adhesive, a gap between said detachable cover plate and said heating member is filled or welded with a thermosetting of a high temperature resistant inorganic adhesive, a connecting gap between said filter element assembly and said electric heating member is filled or welded by a thermosetting of a high temperature resistant inorganic adhesive, and said housing and said detachable cover plate form a closed cavity.
11. The electrically heated regenerative diesel particulate filter of claim 10, wherein the internal reinforcement assembly comprises a retainer plate, a plurality of longitudinal stiffeners, and at least two annular hoops, wherein one end of each of the longitudinal stiffeners is evenly distributed at an outer edge of the retainer plate and extends perpendicularly outward and longitudinally to the removable cover plate, and the other end of each of the longitudinal stiffeners is connected to the removable cover plate by welding, wherein each of the annular hoops is parallel to the retainer plate and is connected to each of the longitudinal stiffeners by welding, wherein the filter element assembly and the electrical heating assembly are disposed within a cavity formed by the retainer plate, the longitudinal stiffeners, and the annular hoops of the internal reinforcement assembly.
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| CN202010558617.0A CN111852621B (en) | 2020-06-18 | 2020-06-18 | Electric heating regeneration type diesel particulate matter purifier |
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Citations (29)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4270936A (en) * | 1980-01-18 | 1981-06-02 | General Motors Corporation | Coiled fibrous metallic material and coating for diesel exhaust particulate trap |
| US4544388A (en) * | 1983-12-27 | 1985-10-01 | Ford Motor Company | Apparatus for periodically oxidizing particulates collected from exhaust gases |
| US4573317A (en) * | 1985-03-11 | 1986-03-04 | General Motors Corporation | Diesel exhaust cleaner and regeneration burner system with indexing particulate trap |
| US5053603A (en) * | 1989-03-30 | 1991-10-01 | Donaldson Company, Inc. | Electrical resistance heater |
| JPH0447108A (en) * | 1990-06-14 | 1992-02-17 | Mitsubishi Heavy Ind Ltd | Exhaust gas cleaning device |
| CN1373689A (en) * | 1999-09-14 | 2002-10-09 | 达尼埃尔·特布尔 | Device for treating IC engine exhaust gases |
| EP1452703A1 (en) * | 2003-02-28 | 2004-09-01 | Adam Opel Ag | Regenerable particulate filter |
| CN2725544Y (en) * | 2004-08-06 | 2005-09-14 | 曹祥奇 | Gasoline engine noise suppressor |
| CN101349183A (en) * | 2007-07-20 | 2009-01-21 | 霓佳斯株式会社 | Catalytic converter, holding material for catalytic converter and production method thereof |
| US7513921B1 (en) * | 2005-09-02 | 2009-04-07 | Hrl Laboratories, Llc | Exhaust gas filter apparatus capable of regeneration of a particulate filter and method |
| CN201230384Y (en) * | 2008-07-08 | 2009-04-29 | 广州市新力金属有限公司 | Cellular ceramic disc type electric heater |
| CN101793182A (en) * | 2009-01-23 | 2010-08-04 | 通用汽车环球科技运作公司 | The electrically heated particulate filter that has zoned exhaust flow control |
| CN203769889U (en) * | 2014-02-20 | 2014-08-13 | 西华大学 | Particle loading device for diesel engine |
| CN104047679A (en) * | 2014-05-23 | 2014-09-17 | 浙江达峰汽车技术有限公司 | Tail gas catalytic cleaner of diesel vehicle |
| CN104763493A (en) * | 2014-01-08 | 2015-07-08 | 张红碧 | Automobile tail gas particulate matter trap and filter element |
| CN204816053U (en) * | 2015-10-14 | 2015-12-02 | 浙江省浦江县畅达有限公司 | High strength high temperature resistance filters filter core |
| CN105899777A (en) * | 2014-01-14 | 2016-08-24 | 天纳克汽车经营有限公司 | Exhaust treatment device insulation detection system |
| WO2017092771A1 (en) * | 2015-12-04 | 2017-06-08 | Exilator Aps | A diesel particulate filter regenerating device and a method of regenerating a diesel particulate filter |
| CN206555002U (en) * | 2016-09-03 | 2017-10-13 | 贵州黄帝车辆净化器有限公司 | Exhaust treatment system for Diesel engine |
| CN206785460U (en) * | 2017-05-25 | 2017-12-22 | 广州市新力金属有限公司 | A kind of electrical heating type regeneration tail gas filtration system |
| CN108412585A (en) * | 2018-05-16 | 2018-08-17 | 安徽全柴动力股份有限公司 | A kind of grain catcher and automobile |
| CN108691616A (en) * | 2017-04-07 | 2018-10-23 | 佛吉亚排气系统有限公司 | The method of exhaust for purifying vehicle, corresponding purifier |
| CN208763723U (en) * | 2018-09-13 | 2019-04-19 | 北京汽车研究总院有限公司 | A kind of discharge filter insulation construction and the vehicle with it |
| CN208893835U (en) * | 2018-06-28 | 2019-05-24 | 韶关市力高机械制造有限公司 | Deduster filter cylinder |
| CN209687574U (en) * | 2019-01-31 | 2019-11-26 | 北京汽车股份有限公司 | Grain catcher |
| CN209752437U (en) * | 2019-03-25 | 2019-12-10 | 东莞市绿谷环保科技有限公司 | Particle catcher filter element assembly and particle catcher |
| CN209781005U (en) * | 2019-05-05 | 2019-12-13 | 无锡双翼汽车环保科技有限公司 | DPF heater for mine |
| CN110593999A (en) * | 2018-06-12 | 2019-12-20 | 大众汽车有限公司 | Exhaust gas aftertreatment system and method for regenerating a particulate filter |
| CN210584082U (en) * | 2019-08-19 | 2020-05-22 | 苏州华元净化过滤设备有限公司 | High-temperature-resistant efficient air filter |
Family Cites Families (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7001449B2 (en) * | 2001-02-05 | 2006-02-21 | N.V. Bekaert S.A. | Diesel exhaust filter system with electrical regeneration |
| DE20117659U1 (en) * | 2001-10-29 | 2002-01-10 | Emitec Emissionstechnologie | Open particle filter with heating element |
| US7083663B2 (en) * | 2003-10-30 | 2006-08-01 | The Regents Of The University Of Michigan | Active filtration of airborne contaminants employing heated porous resistance-heated filters |
| US7980068B2 (en) * | 2005-12-29 | 2011-07-19 | Tenneco Automotive Operating Company Inc. | Woven metal fiber particulate filter |
| US8117832B2 (en) * | 2006-06-19 | 2012-02-21 | Donaldson Company, Inc. | Exhaust treatment device with electric regeneration system |
| US20080202084A1 (en) * | 2007-01-09 | 2008-08-28 | Lynch Michael S | Diesel particulate filter pleat design and method |
| US8844270B2 (en) * | 2009-01-16 | 2014-09-30 | Donaldson Company, Inc. | Diesel particulate filter regeneration system including shore station |
-
2020
- 2020-06-18 CN CN202010558617.0A patent/CN111852621B/en active Active
Patent Citations (29)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4270936A (en) * | 1980-01-18 | 1981-06-02 | General Motors Corporation | Coiled fibrous metallic material and coating for diesel exhaust particulate trap |
| US4544388A (en) * | 1983-12-27 | 1985-10-01 | Ford Motor Company | Apparatus for periodically oxidizing particulates collected from exhaust gases |
| US4573317A (en) * | 1985-03-11 | 1986-03-04 | General Motors Corporation | Diesel exhaust cleaner and regeneration burner system with indexing particulate trap |
| US5053603A (en) * | 1989-03-30 | 1991-10-01 | Donaldson Company, Inc. | Electrical resistance heater |
| JPH0447108A (en) * | 1990-06-14 | 1992-02-17 | Mitsubishi Heavy Ind Ltd | Exhaust gas cleaning device |
| CN1373689A (en) * | 1999-09-14 | 2002-10-09 | 达尼埃尔·特布尔 | Device for treating IC engine exhaust gases |
| EP1452703A1 (en) * | 2003-02-28 | 2004-09-01 | Adam Opel Ag | Regenerable particulate filter |
| CN2725544Y (en) * | 2004-08-06 | 2005-09-14 | 曹祥奇 | Gasoline engine noise suppressor |
| US7513921B1 (en) * | 2005-09-02 | 2009-04-07 | Hrl Laboratories, Llc | Exhaust gas filter apparatus capable of regeneration of a particulate filter and method |
| CN101349183A (en) * | 2007-07-20 | 2009-01-21 | 霓佳斯株式会社 | Catalytic converter, holding material for catalytic converter and production method thereof |
| CN201230384Y (en) * | 2008-07-08 | 2009-04-29 | 广州市新力金属有限公司 | Cellular ceramic disc type electric heater |
| CN101793182A (en) * | 2009-01-23 | 2010-08-04 | 通用汽车环球科技运作公司 | The electrically heated particulate filter that has zoned exhaust flow control |
| CN104763493A (en) * | 2014-01-08 | 2015-07-08 | 张红碧 | Automobile tail gas particulate matter trap and filter element |
| CN105899777A (en) * | 2014-01-14 | 2016-08-24 | 天纳克汽车经营有限公司 | Exhaust treatment device insulation detection system |
| CN203769889U (en) * | 2014-02-20 | 2014-08-13 | 西华大学 | Particle loading device for diesel engine |
| CN104047679A (en) * | 2014-05-23 | 2014-09-17 | 浙江达峰汽车技术有限公司 | Tail gas catalytic cleaner of diesel vehicle |
| CN204816053U (en) * | 2015-10-14 | 2015-12-02 | 浙江省浦江县畅达有限公司 | High strength high temperature resistance filters filter core |
| WO2017092771A1 (en) * | 2015-12-04 | 2017-06-08 | Exilator Aps | A diesel particulate filter regenerating device and a method of regenerating a diesel particulate filter |
| CN206555002U (en) * | 2016-09-03 | 2017-10-13 | 贵州黄帝车辆净化器有限公司 | Exhaust treatment system for Diesel engine |
| CN108691616A (en) * | 2017-04-07 | 2018-10-23 | 佛吉亚排气系统有限公司 | The method of exhaust for purifying vehicle, corresponding purifier |
| CN206785460U (en) * | 2017-05-25 | 2017-12-22 | 广州市新力金属有限公司 | A kind of electrical heating type regeneration tail gas filtration system |
| CN108412585A (en) * | 2018-05-16 | 2018-08-17 | 安徽全柴动力股份有限公司 | A kind of grain catcher and automobile |
| CN110593999A (en) * | 2018-06-12 | 2019-12-20 | 大众汽车有限公司 | Exhaust gas aftertreatment system and method for regenerating a particulate filter |
| CN208893835U (en) * | 2018-06-28 | 2019-05-24 | 韶关市力高机械制造有限公司 | Deduster filter cylinder |
| CN208763723U (en) * | 2018-09-13 | 2019-04-19 | 北京汽车研究总院有限公司 | A kind of discharge filter insulation construction and the vehicle with it |
| CN209687574U (en) * | 2019-01-31 | 2019-11-26 | 北京汽车股份有限公司 | Grain catcher |
| CN209752437U (en) * | 2019-03-25 | 2019-12-10 | 东莞市绿谷环保科技有限公司 | Particle catcher filter element assembly and particle catcher |
| CN209781005U (en) * | 2019-05-05 | 2019-12-13 | 无锡双翼汽车环保科技有限公司 | DPF heater for mine |
| CN210584082U (en) * | 2019-08-19 | 2020-05-22 | 苏州华元净化过滤设备有限公司 | High-temperature-resistant efficient air filter |
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