CN212803366U

CN212803366U - Electric heating regeneration type diesel engine particulate matter purifier

Info

Publication number: CN212803366U
Application number: CN202021141921.7U
Authority: CN
Inventors: 李政纲; 蔡晨; 刘动; 陆秦君; 傅天翳
Original assignee: Shanghai Chenyun Environmental Technology Co Ltd
Current assignee: Shanghai Chenyun Environmental Technology Co Ltd
Priority date: 2020-06-18
Filing date: 2020-06-18
Publication date: 2021-03-26
Anticipated expiration: 2030-06-18

Abstract

The utility model provides an electric heating regenerative diesel particulate purifier, which comprises a shell, a filter element assembly and an electric heating assembly, wherein the electric heating assembly is internally provided with a resistance wire, and the filter element assembly and the electric heating assembly are arranged inside the shell; particulate matter composition to in the diesel engine tail gas carries out effectual purification with the seizure mode, carries out regeneration cycle with the mode of electrical heating oxidation burning to remaining particulate matter on the inside filter core of clarifier to increase equipment life.

Description

Electric heating regeneration type diesel engine particulate matter purifier

Technical Field

The utility model relates to a tail gas clean-up handles the field, especially relates to a diesel engine exhaust 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 the 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.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide an electrical heating regeneration type diesel engine particulate matter clarifier carries out effectual purification with the seizure mode to the particulate matter composition in the diesel engine tail gas.

Another object of the utility model is to provide an electrical heating regeneration type diesel engine particulate matter clarifier carries out regeneration cycle with the mode of electrical heating oxidation burning to remaining particulate matter on the inside filter core of clarifier to reach increase equipment life's purpose.

Another object of the utility model is to provide an electric heating regeneration type diesel engine particulate matter clarifier opens stopping of electric heater, and thermal efficiency control realizes automated management to reach the purpose that reduces the manual maintenance cost.

In order to realize above-mentioned at least one utility model purpose, the utility model provides an electrical heating regeneration type diesel engine particulate matter clarifier, including shell, filter element group spare and electrical heating subassembly, the inside resistance wire that is of electrical heating subassembly, filter element group spare and electrical heating subassembly be set up in the inside of shell.

In some embodiments, wherein the filter element assembly and the electrical heating assembly are axially aligned in a staggered fashion.

In some embodiments, wherein the electrical heating assembly comprises at least two ceramic heating plates, each of the ceramic heating plates being electrically connected in parallel, each of the ceramic heating plates being in a flat disk configuration.

In some embodiments, wherein the filter element assembly comprises a metal sintered filter element and a mesh tube, the metal sintered filter element is made of a metal fiber sintered felt and forms a pleated structure, the mesh tube is nested inside the metal sintered filter element, the electric heating assembly is provided with a high temperature resistant ceramic spool, and the high temperature resistant ceramic spool is fixed on the inner wall of the mesh tube.

In some embodiments, the number of the metal sintered filter elements is at least two, and the metal sintered filter elements are arranged along the gas flow direction of the diesel engine exhaust, wherein the wire diameter of the metal fibers adopted by the metal sintered filter elements is 22 μm, and the metal sintered filter elements form a star-shaped corrugated structure.

In some embodiments, the housing comprises a housing and a removable cover, the housing and the removable cover forming a closed cavity, wherein the removable cover, the filter element assembly, and the electric heating assembly are combined into a single module that can be removed from and replaced in the housing.

In some embodiments, wherein the removable cover is provided with a cover body coated with a heat reflective paint and internally provided with a cover insulation layer.

In some embodiments, wherein the outer shell is provided with an encapsulation, an inner lining, the inner surface of which is coated with a heat reflective coating, and a shell insulation layer, which is provided between the encapsulation and the inner lining.

In some embodiments, the outlet end of the electrically heated regenerative diesel particulate filter is provided with an exhaust pipe and a sensor interface, the electric heating assembly is provided with an electrode terminal, the electrode terminal is arranged through the exhaust pipe, and the sensor interface is connected with the exhaust pipe for connecting an external pressure sensor or a temperature sensor.

In some embodiments, the housing further comprises a limiting sealing plate, a longitudinal reinforcing rib and an annular hoop, the limiting sealing plate, the longitudinal reinforcing rib and the annular hoop are connected in a welding manner, wherein the filter element assembly and the electric heating assembly are arranged in a cavity formed by the limiting sealing plate, the longitudinal reinforcing rib and the annular hoop.

Drawings

Fig. 1 is a schematic perspective view of an electrically heated regenerative diesel particulate filter according to a preferred embodiment of the present invention.

Fig. 2 is an exploded view of the electrically heated regenerative diesel particulate filter according to the above preferred embodiment of the present invention.

Fig. 3 is an exploded view of the electrically heated regenerative diesel particulate filter according to the above preferred embodiment of the present invention.

Fig. 4 is an exploded view of the electrically heated regenerative diesel particulate filter according to the above preferred embodiment of the present invention.

Fig. 5 is an exploded view of the electrically heated regenerative diesel particulate filter according to the above preferred embodiment of the present invention.

Detailed Description

The following description is presented to disclose the invention so as to enable any person skilled in the art to practice the invention. The preferred embodiments in the following description are given by way of example only, and other obvious variations will occur to those skilled in the art. The basic 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 a generic and descriptive sense only and not for purposes of limitation, as the terms are used in the description to indicate that the referenced device or element must have the specified orientation, be constructed and operated in the specified orientation, and not for the purposes of limitation.

Fig. 1 to 5 show an electrically heated regenerative diesel particulate filter according to a preferred embodiment of the present invention. Electric heating regeneration type diesel engine particulate matter clarifier can carry out effectual purification with the seizure mode to the particulate matter composition in the diesel engine tail gas, can carry out regeneration cycle with the mode of electric heating oxidation burning to remaining particulate matter on the inside filter core of clarifier, increases equipment life, removes frequently from and washs or changes the trouble of having blockked up the filter core. The starting and stopping of the electric heater can be realized, the thermal efficiency is controlled to realize automatic management, and the manual maintenance cost is reduced.

Specifically, the electrically heated regenerative diesel particulate filter includes a housing 100, a filter cartridge assembly 200, and an electrical heating assembly 300. The filter cartridge assembly 200 and the electric 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, thereby preventing deformation and displacement. Preferably, in this preferred embodiment of the present invention, the internal structure of the housing 100 for limiting is implemented as the 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 utility model discloses an electrical heating regeneration type diesel engine particulate matter clarifier has the inlet end and gives vent to anger the end. Front end head 120 is located the utility model discloses an electrical heating regeneration type diesel engine particulate matter clarifier's inlet end to the welding form with casing 110 is connected. Rear end closing head 140 is located the end of giving vent to anger of electrical heating regeneration type diesel engine particulate matter purifier, with the welding form with can dismantle apron 130 and connect, can dismantle apron 130 with bolt and nut with casing 110 connects, inside strengthen subassembly 150 with can dismantle apron 130 and connect with the welding form, inside strengthen subassembly 150 with gap between the electrical heating subassembly 300 is filled with high temperature resistant inorganic glue thermosetting, can dismantle apron 130 with gap between the electrical heating subassembly 300 is filled with high temperature resistant inorganic glue 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 electric heating assembly 300 is further provided with an electrode terminal, and the electrode terminal of the electric heating assembly 300 is inserted into the rear end head 140. More specifically, the rear end cap 140 includes an exhaust tube 141 and a sensor interface 142. The electrode terminal of the electric 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 anchor ears 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 inside 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 conduit, so as to enhance the mechanical strength and prevent the leakage. Each high-temperature resistant ceramic wire tube is fixed on the inner wall of the mesh tube 202 in a U-shaped spot-welding mode. The electrode connecting terminal is made of high-temperature resistant ceramic. The electric 300300 can be supplied with 220V or 380V power, 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 electric heating assembly 300 are integrated into a module, which can be detached from and replaced in the housing 100, and has a simple structure, is easy to manufacture and is convenient to replace. When the later stage appears the broken hole of metal sintering filter core 201, mechanical structure damages, and during the circuit condition such as ageing, can the integration change, sparingly overhaul the cost of labor who produces.

It is worth mentioning that each of the ceramic heating plates of the electric heating assembly 300 adopts a flat disc structure, and the heat radiation surface is increased while the resistance wires are arranged in a compact structure. Two adjacent of electric heating element 300 the heat radiation of ceramic heating plate superpose in filter element subassembly 200, metal sintering filter core 201 can accelerate the intensification, works as when fold structure surface temperature on the metal sintering filter core 201 reaches more than 600 ℃, 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 engine particulate matter purifier adopts a closed and compact internal structure, is favorable for reducing air convection, reduces heat radiation loss, and improves the electric heat utilization efficiency. Lifting the liner 112 of the housing 110 and the heat reflective coating applied to the cover body 131 of the removable cover 130 provides about 15% reflection of thermal radiation, which 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 insulation layer of the shell 110 and the cover plate insulation layer of the detachable cover plate 130 are made of materials mainly containing aluminum silicate fibers, so that the heat insulation performance is excellent, the overall heat efficiency of the equipment can be further improved, and the energy consumption is reduced.

It is worth mentioning, in order to reduce daily manual maintenance cost, the utility model discloses an electrical heating regeneration type diesel engine particulate matter clarifier can realize the automated control of electrical heating, and this function is accomplished through the control system that differential pressure sensor, temperature sensor, singlechip, time relay constitute.

It will be understood by those skilled in the art that the embodiments of the present invention as described above and shown in the drawings are given by way of example only and are not limiting of the present 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 without departing from the principles, embodiments of the present invention may have any deformation or modification.

Claims

1. The utility model provides an electrical heating regeneration type diesel engine particulate matter clarifier which characterized in that, includes shell, filter element group spare and electrical heating subassembly, the inside resistance wire that is of electrical heating subassembly, filter element group spare and electrical heating subassembly be set up in the inside of shell.

2. The electrically heated regenerative diesel particulate purifier of claim 1, wherein the filter element assembly and the electrical heating assembly are axially aligned in a staggered fashion.

3. The electrically heated regenerative diesel particulate filter of claim 1, wherein the electrical heating assembly comprises at least two ceramic heating plates, each of the ceramic heating plates being electrically connected in parallel, each of the ceramic heating plates being of a flat disc configuration.

4. An electrically heated regenerative diesel particulate filter as in claim 1, wherein the filter element assembly comprises a metal sintered filter element made of metal fiber sintered felt and formed into a pleated structure and a mesh tube nested inside the metal sintered filter element, the electrical heating assembly being provided with a high temperature resistant ceramic spool fixed on an inner wall of the mesh tube.

5. The electrically heated regenerative diesel particulate filter of claim 4, wherein the number of the metal sintered filter elements is at least two, and the metal sintered filter elements are arranged in a direction of a flow of the diesel exhaust gas, wherein the metal sintered filter elements have a wire diameter of 22 μm, and the metal sintered filter elements are formed in a star-shaped pleated structure.

6. An electrically heated regenerative diesel particulate filter as in any of claims 1 to 5, wherein the housing comprises a housing and a removable cover, the housing and the removable cover forming a closed cavity, wherein the removable cover, the filter element assembly, and the electrical heating assembly are combined as a single, unitary module that is removable from and replaceable in the housing.

7. The electrically heated regenerative diesel particulate purifier of claim 6, wherein the removable cover plate is provided with a cover plate body coated with a heat reflective paint and internally provided with a cover plate thermal insulation layer.

8. An electrically heated regenerative diesel particulate filter as claimed in any of claims 1 to 5, wherein the housing is provided with an encapsulation, an inner lining having an inner surface coated with a heat reflective coating, and a shell insulation layer disposed between the encapsulation and the inner lining.

9. The electrically heated regenerative diesel particulate filter of any one of claims 1 to 5, wherein an exhaust pipe and a sensor interface are provided at an outlet end of the electrically heated regenerative diesel particulate filter, the electric heating assembly is provided with an electrode terminal, the electrode terminal is arranged through the exhaust pipe, and the sensor interface is connected with the exhaust pipe for connecting with an external pressure sensor or temperature sensor.

10. The electrically heated regenerative diesel particulate filter of any one of claims 1 to 5, wherein the housing further comprises a position-defining sealing plate, longitudinal ribs, and an annular hoop, the position-defining sealing plate, the longitudinal ribs, and the annular hoop being connected by welding, wherein the filter element assembly and the electrical heating assembly are disposed within a cavity formed by the position-defining sealing plate, the longitudinal ribs, and the annular hoop.