CN113202601A - Heating unit, particle filter cleaning device and equipment - Google Patents
Heating unit, particle filter cleaning device and equipment Download PDFInfo
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- CN113202601A CN113202601A CN202110678588.6A CN202110678588A CN113202601A CN 113202601 A CN113202601 A CN 113202601A CN 202110678588 A CN202110678588 A CN 202110678588A CN 113202601 A CN113202601 A CN 113202601A
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- 238000010438 heat treatment Methods 0.000 title claims abstract description 134
- 238000004140 cleaning Methods 0.000 title claims abstract description 90
- 239000002245 particle Substances 0.000 title abstract description 28
- 238000005485 electric heating Methods 0.000 claims abstract description 16
- 229910001220 stainless steel Inorganic materials 0.000 claims description 19
- 239000010935 stainless steel Substances 0.000 claims description 19
- 239000000919 ceramic Substances 0.000 claims description 5
- 239000002184 metal Substances 0.000 claims description 5
- 238000005406 washing Methods 0.000 claims 2
- 238000001914 filtration Methods 0.000 abstract description 6
- 238000005265 energy consumption Methods 0.000 abstract description 2
- 238000012986 modification Methods 0.000 description 9
- 230000004048 modification Effects 0.000 description 9
- 239000000463 material Substances 0.000 description 6
- 238000004321 preservation Methods 0.000 description 6
- 230000000694 effects Effects 0.000 description 5
- 238000000034 method Methods 0.000 description 5
- 238000010586 diagram Methods 0.000 description 4
- 238000010926 purge Methods 0.000 description 4
- 239000011810 insulating material Substances 0.000 description 2
- 239000013618 particulate matter Substances 0.000 description 2
- 238000010992 reflux Methods 0.000 description 2
- 230000008929 regeneration Effects 0.000 description 2
- 238000011069 regeneration method Methods 0.000 description 2
- 238000012546 transfer Methods 0.000 description 2
- 239000011324 bead Substances 0.000 description 1
- 230000003139 buffering effect Effects 0.000 description 1
- 230000003197 catalytic effect Effects 0.000 description 1
- 238000010531 catalytic reduction reaction Methods 0.000 description 1
- 238000002485 combustion reaction Methods 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 239000000446 fuel Substances 0.000 description 1
- 230000017525 heat dissipation Effects 0.000 description 1
- 238000009413 insulation Methods 0.000 description 1
- 230000003647 oxidation Effects 0.000 description 1
- 238000007254 oxidation reaction Methods 0.000 description 1
- 230000005855 radiation Effects 0.000 description 1
- 238000004064 recycling Methods 0.000 description 1
- 238000006722 reduction reaction Methods 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
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Classifications
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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
- F01N3/0237—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 for regenerating ex situ
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B08—CLEANING
- B08B—CLEANING IN GENERAL; PREVENTION OF FOULING IN GENERAL
- B08B13/00—Accessories or details of general applicability for machines or apparatus for cleaning
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B08—CLEANING
- B08B—CLEANING IN GENERAL; PREVENTION OF FOULING IN GENERAL
- B08B15/00—Preventing escape of dirt or fumes from the area where they are produced; Collecting or removing dirt or fumes from that area
- B08B15/04—Preventing escape of dirt or fumes from the area where they are produced; Collecting or removing dirt or fumes from that area from a small area, e.g. a tool
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B08—CLEANING
- B08B—CLEANING IN GENERAL; PREVENTION OF FOULING IN GENERAL
- B08B5/00—Cleaning by methods involving the use of air flow or gas flow
- B08B5/02—Cleaning by the force of jets, e.g. blowing-out cavities
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B08—CLEANING
- B08B—CLEANING IN GENERAL; PREVENTION OF FOULING IN GENERAL
- B08B7/00—Cleaning by methods not provided for in a single other subclass or a single group in this subclass
- B08B7/0064—Cleaning by methods not provided for in a single other subclass or a single group in this subclass by temperature changes
- B08B7/0071—Cleaning by methods not provided for in a single other subclass or a single group in this subclass by temperature changes by heating
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B08—CLEANING
- B08B—CLEANING IN GENERAL; PREVENTION OF FOULING IN GENERAL
- B08B9/00—Cleaning hollow articles by methods or apparatus specially adapted thereto
- B08B9/02—Cleaning pipes or tubes or systems of pipes or tubes
- B08B9/027—Cleaning the internal surfaces; Removal of blockages
- B08B9/032—Cleaning the internal surfaces; Removal of blockages by the mechanical action of a moving fluid, e.g. by flushing
- B08B9/0321—Cleaning the internal surfaces; Removal of blockages by the mechanical action of a moving fluid, e.g. by flushing using pressurised, pulsating or purging fluid
- B08B9/0328—Cleaning the internal surfaces; Removal of blockages by the mechanical action of a moving fluid, e.g. by flushing using pressurised, pulsating or purging fluid by purging the pipe with a gas or a mixture of gas and liquid
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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
- F01N3/0232—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 removing incombustible material from a particle filter, e.g. ash
-
- 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
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- General Engineering & Computer Science (AREA)
- Processes For Solid Components From Exhaust (AREA)
Abstract
The invention belongs to the field of automobiles, and particularly relates to a heating unit, a particle filtering and cleaning device and a particle filter cleaning device, because the particle filtering and cleaning device of the particle filter cleaning device is provided with the heating unit, the heating unit is arranged on an insulating cylinder in a tubular shell and is provided with a plurality of through cavities, a plurality of electric heating wires are respectively arranged in the plurality of through cavities, each electric heating wire is provided with two connecting ends, all the connecting ends are electrically connected with a wiring end of a wiring unit arranged at the end part of the tubular shell according to a preset mode, the wiring end is communicated with an external power supply to supply power to the electric heating wires, so that air flow passing through the through cavities can be heated by the electric heating wires, and the air flow is respectively and fully contacted with the heating wires through different through the through cavities, the temperature of the air flow passing through the heating unit can quickly reach the preset temperature, the heating efficiency is higher, the energy consumption is less.
Description
Technical Field
The invention belongs to the field of automobiles, and particularly relates to a heating unit, a particle filtering and cleaning device and particle filter cleaning equipment.
Background
The Diesel vehicle exhaust system comprises an exhaust pipe and a particle Filter (DPF for short) arranged in the exhaust pipe, and when tail gas in the exhaust pipe passes through the DPF, Particulate matters and oil stains in the tail gas are adsorbed and filtered by a Filter element of the DPF. However, as the operation time of the exhaust system of the diesel vehicle increases, particulate matter and oil stains inside the DPF filter element also accumulate. The accumulated particulate matter and oil stain inside the DPF filter element can cause the problems of exhaust back pressure increase, oil consumption increase, power reduction and the like of a vehicle. In addition, when the DPF filter element is seriously blocked, the exhaust cannot be discharged.
At present, the traditional solution is to periodically remove the DPF from the exhaust system of the diesel vehicle and then clean the DPF to restore the normal working level. The conventional method for cleaning the DPF is heating regeneration cleaning, and the principle of the method is to burn and oxidize particulate matters and the like adsorbed in the DPF by high-temperature heating, so as to achieve the purpose of cleaning. Heating regeneration washs and realizes through the DPF heating furnace usually, and the DPF heating furnace has the furnace chamber and coils the resistance wire in the furnace chamber, and the DPF is placed in the furnace chamber, and the DPF heating furnace utilizes natural heat-conduction to heat to rely on the resistance wire heating air of coiling in the furnace chamber and give DPF with heat transfer through heat radiation. However, the method for cleaning the DPF has poor heat transfer efficiency, the whole process of cleaning the DPF is long in time consumption, and the energy consumption cost is extremely high.
Disclosure of Invention
The present invention has been made to solve the above-described problems, and an object thereof is to provide a heating unit, a particulate filter cleaning device, and a particulate filter cleaning apparatus.
The present invention provides a heating unit having the features comprising: a tubular housing; the insulating cylinder is arranged in the tubular shell and is provided with a plurality of through cavities; a plurality of electric heating wires respectively arranged in the plurality of through cavities; and a wiring unit disposed at an end of the tubular housing, wherein each of the heating wires has two connection ends, the wiring unit has a plurality of connection ends communicated with an external power supply and electrically connected to the connection ends, and all the connection ends of the plurality of heating wires are electrically connected to the plurality of connection ends in a predetermined connection manner.
In the heating unit provided by the present invention, there may be further provided a feature that: wherein, external power source provides the three-phase alternating current of U looks, V looks, W looks, and the heating wire sets 3m root, and m is greater than or equal to 1, divide into m group, and two links of every heating wire are first link and second link respectively, and the wiring end sets 3m, divide into m group, and three wiring end in every group is linked together with the power end of U looks, V looks, W looks respectively, and predetermined connected mode is: all the first connecting ends in each group of heating wires are mutually connected, and all the second connecting ends are respectively mutually connected with three of the corresponding group of wiring ends; or the predetermined connection mode is as follows: each group of heating wires is connected in series, and the first connecting end and the second connecting end of two adjacent heating wires form three connecting points respectively, and the three connecting points are connected with three connecting points in a corresponding group of wiring terminals respectively.
In the heating unit provided by the present invention, there may be further provided a feature that: the wiring unit comprises three wiring piles, the three wiring piles are arranged on the end portion of the tubular shell and comprise stainless steel connecting pieces and high-temperature-resistant insulating sleeves wrapped on the outer surfaces of the stainless steel connecting pieces, the three stainless steel connecting pieces are respectively communicated with power supply ends of a U phase, a V phase and a W phase, and the same-phase wiring ends in all the wiring terminals are connected with the same-phase wiring ends and the stainless steel connecting pieces.
In the heating unit provided by the present invention, there may be further provided a feature that: the cavity channels are distributed into two layers along the circumferential direction of the insulating cylinder, the number of the cavity channels in each layer is 3m, each heating wire is distributed in the two cavity channels distributed in pairs in a U shape, one of the two cavity channels in pairs is located in one layer, and the other cavity channel in pairs is located in the other layer.
In the heating unit provided by the present invention, there may be further provided a feature that: the cavity channels are distributed into two layers along the circumferential direction of the insulating cylinder body and serve as a central layer and an edge layer, the cavity channels in the central layer are set to be 2m, the cavity channels in the edge layer are set to be 4m, each heating wire is distributed in the two cavity channels distributed in pairs in a U shape, the two cavity channels in pairs are arranged adjacently, and all the heating wires are in central symmetry.
In the heating unit provided by the present invention, there may be further provided a feature that: at least three bulges used for positioning the electric heating wire are arranged in the through cavity channel, and the bulges are used for enabling the electric heating wire to be positioned at the center of the through cavity channel.
In the heating unit provided by the present invention, there may be further provided a feature that: the tubular shell is a metal shell, the length of the tubular shell is 65 cm-75 cm, the inner diameter of the tubular shell is 20 cm-22 cm, the length of the insulating column is 3 cm-10 cm shorter than the length of the tubular shell, a gap is formed between the insulating column and the tubular shell, the gap is 0.4 cm-0.75 cm, and the insulating column comprises a plurality of ceramic column parts which are sequentially and adjacently jointed.
In the heating unit provided by the present invention, there may be further provided a feature that: the particle filter cleaning device further comprises a cleaning chamber for placing the particle filter and a high-temperature air input unit for inputting high-temperature air into the cleaning chamber, wherein the heating unit is positioned below the cleaning chamber and inputs the air heated to high temperature into the cleaning chamber through the high-temperature air input unit.
The present invention provides a particulate filter cleaning apparatus having features comprising: a cleaning chamber for placing a particulate filter; a heating unit for heating the air flow; an air flow driving unit for providing a driving force for the flow of the air flow; the air flow input unit inputs high-temperature air flow formed after the heating unit heats the air flow into the cleaning chamber; an air flow output unit for outputting high temperature air flow in the cleaning chamber; and an air flow returning unit that returns the high-temperature air flow from the air flow output unit so that the high-temperature air flow circulates, wherein the heating unit is any one of the above heating units.
The present invention provides a particulate filter cleaning apparatus having features comprising: a cabinet body; a particulate filter cleaning device; and a control device for controlling the operation of the particulate filter cleaning device, wherein the particulate filter cleaning device is the previous particulate filter cleaning device.
The Particulate Filter cleaning apparatus of the present invention can clean a Particulate Filter, such as a Diesel Particulate Filter (DPF) or a Gasoline Particulate Filter (GPF), for example. In addition, the particulate filter cleaning equipment can also clean other parts in the Exhaust system of the fuel vehicle, which need to clean particulate matters regularly, such as parts related to an Oxidation Catalytic converter (DOC), an Exhaust Gas recirculation system (EGR), a Selective Catalytic Reduction System (SCR), and the like; and the parts to be cleaned are only required to be placed in the cleaning chamber of the equipment, and the high-temperature air flow is ensured to pass through the parts, so that the cleaning can be realized. In addition, when cleaning a component other than the particulate filter, in order to achieve a better cleaning effect, it is also possible to select to replace the support portion in the particulate filter cleaning apparatus suitable for cleaning the particulate filter with a support member adapted to the component.
Action and Effect of the invention
According to the heating unit, the particulate filter cleaning device and the particulate filter cleaning apparatus relating to the present invention, because the particle filtering and cleaning device of the particle filter cleaning equipment is provided with the heating unit, the insulating cylinder of the heating unit arranged in the tubular shell is provided with a plurality of through cavities, a plurality of electric heating wires are respectively arranged in the plurality of through cavities, each heating wire has two connection ends, all of which are electrically connected with a terminal of a wiring unit provided at an end of the tubular housing in a predetermined manner, the terminal being communicated with an external power supply to supply power to the heating wire so that air flow passing through the cavity can be heated by the heating wire, and the air flow fully contacts the heating wires through different through cavities, so that the temperature of the air flow passing through the heating unit can quickly reach the preset temperature, the heating efficiency is extremely high, and the energy loss is less. Therefore, the particle filtering and cleaning device and the particle filter cleaning equipment can clean the particle oil stain in the particle filter at one time, are simple to operate and save labor cost.
Drawings
FIG. 1 is a schematic view of a particulate filter cleaning apparatus according to an embodiment of the present invention;
FIG. 2 is a schematic view of the structure of a particulate filter cleaning apparatus according to an embodiment of the present invention;
FIG. 3 is a schematic view of a heating unit according to an embodiment of the present invention;
FIG. 4 is a schematic end view of a heating unit according to an embodiment of the present invention;
FIG. 5 is a schematic diagram of an embodiment of an insulating column of the present invention;
FIG. 6 is a schematic diagram illustrating the connection relationship between each group of heating wires according to an embodiment of the present invention;
fig. 7 is a schematic end view of an insulating column according to a first modification of the present invention;
fig. 8 is a schematic view showing a connection relationship between each set of heating wires according to a second modification of the present invention.
Detailed Description
In order to make the technical means, the original features, the achieved objects and the effects of the present invention easily understood, the following embodiments are made to describe a heating unit, a particulate filter cleaning device and a particulate filter cleaning apparatus of the present invention in detail with reference to the accompanying drawings.
< example >
This example describes in detail the specific structure and method of use of the particulate filter cleaning apparatus.
Fig. 1 is a schematic structural view of the particulate filter cleaning apparatus in this embodiment.
As shown in fig. 1, the particulate filter cleaning apparatus 1 includes a cabinet 2, a particulate filter cleaning device 3, and a control device 4.
The cabinet body 2 is a stainless steel cuboid cabinet, four supporting legs 5 are fixed on four corners of the bottom surface respectively, so that the cabinet body 2 has a certain distance with the ground, and heat dissipation is facilitated.
The control device 4 is installed on the cabinet 2 and controls the operation of the particulate filter cleaning device 3.
Fig. 2 is a schematic structural view of the particulate filter cleaning apparatus in this embodiment.
As shown in fig. 2, the particulate filter cleaning device 3 is installed in the cabinet 2, and includes an air flow driving unit 6, an air flow returning unit 7, a heating unit 8, an air flow input unit 9, a cleaning chamber 10, an air flow output unit 11, an air intake unit 32, and an exhaust unit 33.
The air flow driving unit 6 has a driving motor 12, a blower 13, and a driving duct 14. The driving motor 12 is installed at the top of the cabinet 2, the blower 13 is connected to an output end of the driving motor 12, and has an air inlet 15 and an air outlet 16, and the blower 13 is capable of sucking air from the air inlet 15 by driving of the driving motor 12 and discharging the air from the air outlet 16 after generating an air flow. The drive duct 14 communicates with an air outlet 16 of the blower 13, and an air flow is generated from the blower 13 and enters the drive duct 14.
The air flow return unit 7 is a delivery duct which communicates with a drive duct 14, through which the air flow enters the delivery duct 14.
The heating unit 8 is communicated with the air flow refluxing unit 7, and can heat the air flow delivered by the air flow refluxing unit 7 to form a high-temperature air flow.
Fig. 3 is a schematic structural view of a heating unit in this example, and fig. 4 is a schematic structural view of an end face of the heating unit in this example.
As shown in fig. 3 and 4, the heating unit 8 includes a tubular housing 17, an insulating cylinder 18, a plurality of heating wires 19, and a wiring unit 20.
The tubular housing 17 has one end connected to the air flow returning unit 7 and the other end connected to the air flow input unit 9. The tubular shell 17 is a high-temperature-resistant stainless steel shell, the length of the tubular shell is 65 cm-75 cm, and the inner diameter of the tubular shell is 20 cm-22 cm. The outer surface of the tubular housing 17 is covered with a layer of insulation (not shown) which can insulate the tubular housing. The tubular housing 17 has four mounting pieces 39 on its end face connected to the air flow inlet unit 8, which are evenly distributed in the circumferential direction of the tubular housing 17.
Fig. 5 is a schematic structural diagram of the insulating column in this embodiment.
As shown in fig. 5, the insulating cylinder 18 is installed in the tubular housing 17, and has a length shorter than that of the tubular housing 17 by 3cm to 10 cm. A gap of 0.4-0.75 cm is formed between the insulating column 18 and the tubular shell 17, and the gap is filled with heat-insulating materials, so that a certain buffering effect can be achieved, and the insulating column is prevented from colliding with the tubular shell.
The insulating cylinder 18 comprises a plurality of ceramic cylinder portions 21 which are successively adjacent and bolted together and have a plurality of through channels 22, the through channels 22 extending in the same direction as the length of the insulating cylinder 18. The plurality of through cavities 22 are distributed into two layers along the circumferential direction of the insulating cylinder 18 to serve as an inner layer and an outer layer, the number of the through cavities 22 in each layer is 3m, and m is larger than or equal to 1.
In this embodiment, m is 3, the number of the through channels 22 in each layer is 9, and the 9 through channels 22 in the two layers are respectively in one-to-one correspondence. The section of the inner layer through cavity channel 22 is fan-shaped, and the section of the outer layer through cavity channel 22 corresponding to the inner layer is quadrilateral.
The plurality of heating wires 19 are arranged to be 3m, m is equal to or greater than 1, and the heating wires are divided into m groups, in this embodiment, m is 3, and the number of the heating wires is 9, and the heating wires are divided into 3 groups. Each heating wire is spiral and has two connecting ends, the two connecting ends are respectively a first connecting end 23 and a second connecting end 24, each heating wire 19 is distributed in two paired through cavities 22 in a U shape, one of the paired through cavities 22 is positioned on one layer, the other is positioned on the other layer, and air flow passing through the through cavities 22 is heated to generate high-temperature air flow.
The total power of the plurality of heating wires 19 is 10KW or more, and in the present embodiment, the total power of the plurality of heating wires 19 is preferably 27 KW.
The electric heating wire material used in the embodiment is a Beijing first Steel HRE material, the wire diameter is 1.8mm, the resistivity is 1.45, the outer diameter of the spirally formed cylinder is 21mm, and the inner diameter is (21-1.8 multiplied by 2) mm.
The terminal unit 20 has a housing with 3 terminal studs 25 and 3m terminals 26.
3 terminal studs 25 are fixed to the end of the tubular housing 17 at the end connected to the air flow return unit 7, each terminal stud 25 comprising a stainless steel connector 27 and a high temperature resistant insulating sleeve 28. The 3 stainless steel connectors 27 are electrically connected to a U-phase power source terminal, a V-phase power source terminal, and a W-phase power source terminal of an external power source that supplies three-phase ac power of U-phase, V-phase, and W-phase, respectively, as a U-connection post, a V-connection post, and a W-connection post. The 3 high temperature resistant insulating sleeves 28 correspond to the 3 stainless steel connecting pieces 27 one by one, and wrap the outer surfaces of the corresponding stainless steel connecting pieces 27 respectively, so that the conductive phenomenon between the stainless steel connecting pieces 27 and the tubular shell 17 is avoided.
The terminals 26 are arranged in 3m, m is greater than or equal to 1, and the terminals are divided into m groups, in the embodiment, m is 3, and 9 terminals are divided into 3 groups, i.e. U group, V group and W group, respectively, i.e. 9 terminals are U group1、U2、U3、V1、V2、V3、W1、W2、W3。
U1、U2、U3Three terminals are connected with the U-shaped wiring piles, V1、V2、V3Three terminals are connected to the V-shaped wiring piles, W1、W2、W3The three terminals are connected with the W wiring piles.
Fig. 6 is a schematic diagram of the connection relationship of each group of heating wires in the present embodiment.
Taking the connection relationship of the first group of heating wires 19 as an example, as shown in fig. 6,the first connecting ends 23 of the three heating wires 19 are connected with each other, and the second connecting ends 24 of the three heating wires 19 are respectively connected with the U1Terminal, V1Terminal and W1And connecting the terminals.
The connection relationship between the other two groups of heating wires is similar to that of the first group of heating wires, and is not described herein again.
In this embodiment, the three-phase ac voltage supplied from the external power source is 380V, and the voltage applied to each heating wire 19 is 220V after the connection in the above manner.
In addition, ceramic beads (not shown) are wrapped on the outer surfaces of the first connection ends 23 and the second connection ends 24 of the plurality of heating wires 19 to prevent the plurality of heating wires 19 from contacting each other to cause a short circuit.
The air flow input unit 9 is a duct, communicates with the heating unit 8, and conveys the high-temperature air flow generated by the heating unit 8.
The air flow output unit 11 is a duct, and communicates with the purge chamber 10 and the air flow driving unit 6, respectively, and circulates a high-temperature air flow by being driven by the air flow driving unit 6.
The air inlet unit 32 is a duct, communicates with the air flow input unit 9, and is capable of introducing outside air into the purge chamber 10 through the air flow input unit 9.
The exhaust unit 33 is a duct, communicates with the airflow drive unit 6, and can exhaust a high-temperature airflow.
Electrically controlled valves are provided between the intake unit 32 and the airflow input unit 9, between the exhaust unit 33 and the airflow drive unit 6, and between the airflow drive unit 6 and the airflow return unit 7.
The particulate filter in this embodiment is a DPF, and the operation of the particulate filter cleaning apparatus 1 in this embodiment is as follows:
first, the operator starts the particulate filter cleaning apparatus 1, puts the particulate filter into the heat-insulating chamber 29, closes the heat-insulating door 30, and turns on the air flow driving unit 6 through the control device 4. The electrically controlled valve of the air intake unit 32 is closed, the electrically controlled valve between the air exhaust unit 33 and the air flow driving unit 6 is closed, and the electrically controlled valve between the air flow driving unit 6 and the air flow returning unit 7 is opened. The air flow driving unit 6 sucks air from the air inlet 15, generates an air flow, and discharges the air flow from the air outlet 16 into the air flow returning unit 7, and the air flow is delivered to the heating unit 8 through the air flow returning unit 7. When the external power supply is turned on, the external power supply supplies U, V, W three-phase alternating current to the 3 wiring studs 25 of the wiring unit 20, the 9 wiring terminals 26 connected to the wiring studs 26 supply power to the 9 heating wires 19, respectively, and the temperature of the heating wires 19 rises after being electrified, so that the total power reaches 27 KW. The air flow passes through 18 through cavities 22 on the insulating column body, and after heat exchange is respectively carried out between the air flow and the heating wires 19 in the through cavities 22, the air flow is heated to be high-temperature air flow. The high-temperature air flow enters the heat-insulating chamber 29 through the air flow input unit 9, and cleans the particulate filter in the heat-insulating chamber 29, so that the particulates accumulated in the particulate filter are sufficiently combusted. The high temperature air flow is converted into low temperature air flow after passing through the particle filter, and the low temperature air flow enters the air flow driving unit 6 through the air inlet 15 again under the driving action of the air flow driving unit 6 and enters the air flow return unit 7 from the air outlet 16 for recycling.
In the embodiment, the temperature is raised to 550-700 ℃ within 10-20 min, the cleaning stage is reached, and the temperature of the cleaning stage is maintained at 550-700 ℃ for 10-20 min. After a plurality of tests, the particulate oil stain in the particulate filter can be cleaned under the temperature condition, and the particulate oil stain in the particulate filter can be completely combusted in the cleaning process, so that harmful gas generated due to insufficient combustion is not generated.
After the cleaning is finished, the electric control valve of the air inlet unit 32 is completely opened, the electric control valve between the air outlet unit 33 and the air flow driving unit 6 is opened, and the electric control valve between the air flow driving unit 6 and the air flow returning unit 7 is closed. The external air is discharged by the air flow driving unit 6 after passing through the air intake unit 32, the air flow input unit 9, the purge chamber 10, the air flow output unit 11, and the exhaust unit 33 in this order. After the particulate filter is lowered to a temperature at which the particulate filter can be taken out, the thermal insulating door 30 is opened to take out the cleaned particulate filter.
< modification example I >
The present modification differs from the embodiment in that the heating unit 34 of the particulate filter cleaning apparatus 1 is different.
Fig. 7 is a schematic view of the end face structure of the insulating column in the present modification.
As shown in fig. 7, the insulating cylinder 35 of the heating unit 34 has a plurality of through channels 36, the plurality of through channels 36 are distributed in two layers along the circumferential direction of the insulating cylinder 35 as a central layer and an edge layer, the number of the through channels in the central layer is 2m, and the number of the through channels in the edge layer is 4 m.
In the present modification, m is 3, the cross section of the through channel 36 in the central layer is in the shape of a sector, the number of the through channels is 6, three corners of the sector are provided with first protrusions 37 protruding toward the center of the sector, and the first protrusions 37 extend to both ends of the through channel 36 along the length direction of the through channel 36. The cross section of the through cavity in the edge layer is quadrilateral, the number of the cross section is 12, the four corners of the quadrilateral are respectively provided with a second bulge 38 protruding towards the center of the quadrilateral, and the second bulges 38 extend to the two ends of the through cavity 36 along the length direction of the through cavity 36.
Each heating wire 19 is distributed in two through cavities 36 distributed in pairs, the two through cavities 36 in pairs are adjacently arranged, and all the heating wires 19 are in central symmetry. The first and second protrusions 37 and 38 in the through channel 36 keep the position of the heating wire 19 at the center of the through channel, so that the contact area of the heating wire with the channel is reduced, the thermal conductivity is reduced, and the heating efficiency of the air flow is improved.
< modification example two >
The present modification is different from the embodiment in the connection relationship of each group of heating wires.
Fig. 8 is a schematic view showing the connection relationship between the heating wires of each group in the present modification.
Taking the connection relationship of the first group of heating wires 19 as an example, as shown in fig. 8, three heating wires 19 are connected in series, and the first connection end 23 and the second connection end 24 of two adjacent heating wires 19 respectively form three connection points, which are respectively connected with the U of the corresponding group1Terminal, V1Terminal and W1The terminals are connected to each other.
The connection relationship of the other two sets of heating wires is similar to that of the first set of heating wires 19, and is not described herein again.
Effects and effects of the embodiments
According to the heating unit, the particulate filter cleaning device and the particulate filter cleaning apparatus relating to the present embodiment, because the particle filtering and cleaning device of the particle filter cleaning equipment is provided with the heating unit, the insulating cylinder of the heating unit arranged in the tubular shell is provided with a plurality of through cavities, a plurality of electric heating wires are respectively arranged in the plurality of through cavities, each heating wire has two connection ends, all of which are electrically connected with a terminal of a wiring unit provided at an end of the tubular housing in a predetermined manner, the terminal being communicated with an external power supply to supply power to the heating wire so that air flow passing through the cavity can be heated by the heating wire, and the air flow fully contacts the heating wires through different through cavities, so that the temperature of the air flow passing through the heating unit can quickly reach the preset temperature, the heating efficiency is extremely high, and the energy loss is less.
According to the particulate filter cleaning apparatus of the present embodiment, when cleaning the particulate filter placed in the cleaning chamber, the air flow driving means drives the air flow to enter the heating means through the air flow returning means, the heating means heats the air flow to a high temperature air flow, the air flow enters the cleaning chamber through the air flow input means to clean the particulate filter, and the cleaned high temperature air flow returns to the air flow returning means through the air flow output means to be recirculated. Because the heating unit can heat the air flow to 550-700 ℃ within 10-20 min and maintain the temperature for 10-20 min, the particles and the oil stains in the particle filter can be fully combusted, secondary pollution is not generated, and the cleaning is finished in one step, so that the cleaning efficiency of the particle filter is improved.
According to the particle filter cleaning equipment of the embodiment, the particle filter cleaning device and the control device are provided, so that the particle filter can be cleaned under the control of the control device, the cleaning efficiency is high, the steps are simple, the manual labor cost is low, the particle filter is cleaned by using high-temperature air flow, extra high-pressure pulse air flow equipment is not needed, the equipment cost is low, and the equipment is suitable for popularization.
The above embodiments are preferred examples of the present invention, and are not intended to limit the scope of the present invention.
In the embodiment of the present invention, the tubular housing is made of a high temperature resistant stainless steel material, and in practical applications, the material of the tubular housing may be any high temperature resistant material.
In the embodiment of the invention, the tubular shell is made of high-temperature-resistant stainless steel material, the wiring pile needs to comprise a ceramic high-temperature-resistant insulating sleeve, and in practical application, when the tubular shell is made of insulating material, the wiring pile can be provided with no high-temperature-resistant insulating sleeve.
In this embodiment, the connection stub of the connection unit is a stainless steel connector, and the connection terminal is connected with an external power source through the stainless steel connector. In practical application, the terminal post of the terminal unit may be a column shape with a hollow interior, and the terminal passes through the terminal post and is directly connected with an external power supply.
Claims (10)
1. A heating unit disposed in a particulate filter cleaning apparatus, comprising:
a tubular housing;
the insulating cylinder is arranged in the tubular shell and is provided with a plurality of through cavities;
a plurality of electric heating wires respectively arranged in the plurality of through cavities;
a wiring unit provided at an end of the tubular housing,
wherein each heating wire is provided with two connecting ends,
the wiring unit has a plurality of terminals communicating with an external power source and for electrical connection with the connection terminals,
and all the connecting ends of the heating wires are electrically connected with the plurality of wiring ends according to a preset connecting mode.
2. The heating unit of claim 1, wherein:
wherein the external power supply provides three-phase alternating current of U phase, V phase and W phase,
the number of the electric heating wires is 3m, m is more than or equal to 1, the electric heating wires are divided into m groups, two connecting ends of each electric heating wire are respectively a first connecting end and a second connecting end,
the number of the wiring terminals is 3m, the wiring terminals are divided into m groups, three wiring terminals in each group are respectively communicated with power supply ends of a U phase, a V phase and a W phase,
the predetermined connection mode is as follows: all the first connecting ends in each group of the heating wires are mutually connected, and all the second connecting ends are respectively mutually connected with three of the corresponding groups of the wiring ends; or
The predetermined connection mode is as follows: each group of the heating wires are connected in series, the first connecting end and the second connecting end of two adjacent heating wires form three connecting points respectively, and the three connecting points are connected with three connecting points in the corresponding group of the wiring terminals respectively.
3. The heating unit of claim 2, wherein:
wherein the wiring unit contains three wiring stubs provided on the end portion of the tubular housing,
the wiring pile comprises a stainless steel connecting piece and a high-temperature-resistant insulating sleeve wrapped on the outer surface of the stainless steel connecting piece,
the three stainless steel connecting pieces are respectively communicated with the power supply ends of the U phase, the V phase and the W phase,
the terminals of the same phase in each set of terminals are connected to the stainless steel connectors of the same phase.
4. The heating unit of claim 2, wherein:
wherein the plurality of through cavities are distributed into two layers along the circumferential direction of the insulating cylinder, the number of the cavities in each layer is 3m,
each heating wire is distributed in two through cavities distributed in pairs in a U shape, one of the two through cavities in pairs is positioned at one layer, and the other is positioned at the other layer.
5. The heating unit of claim 2, wherein:
wherein the plurality of channels are distributed into two layers along the circumferential direction of the insulating cylinder to serve as a central layer and an edge layer, the number of the channels in the central layer is set to be 2m, the number of the channels in the edge layer is set to be 4m,
each heating wire is distributed in two cavity channels distributed in pairs in a U shape, the two cavity channels in pairs are adjacently arranged, and all the heating wires are in central symmetry.
6. The heating unit of claim 1, wherein:
at least three bulges used for positioning the electric heating wire are arranged in the through cavity channel, and the bulges are used for enabling the electric heating wire to be positioned at the center of the through cavity channel.
7. The heating unit of claim 1, wherein:
wherein the tubular shell is a metal shell, the length is 65 cm-75 cm, the inner diameter is 20 cm-22 cm,
the length of the insulating column is 3 cm-10 cm shorter than that of the tubular shell,
a gap is formed between the insulating column body and the tubular shell, the gap is 0.4 cm-0.75 cm,
the insulating cylinder includes a plurality of ceramic cylinder portions joined adjacent to one another in series.
8. The heating unit of claim 1, wherein:
wherein the particulate filter cleaning apparatus further comprises a cleaning chamber in which the particulate filter is placed and a high temperature air input unit which inputs high temperature air into the cleaning chamber,
the heating unit is located below the washing chamber and inputs air heated to a high temperature into the washing chamber through the high temperature air input unit.
9. A particulate filter cleaning apparatus, comprising:
a wash chamber for housing the particulate filter;
a heating unit for heating the air flow;
an air flow driving unit for providing a driving force for the flow of the air;
an air flow input unit which inputs high-temperature air flow formed after the heating unit heats the cleaning chamber;
an air flow output unit that outputs the high-temperature air flow in the cleaning chamber; and
an air flow returning unit that returns the high temperature air flow from the air flow output unit so that the high temperature air flow circulates,
wherein the heating unit is the heating unit of any one of claims 1-8.
10. A particulate filter cleaning apparatus, comprising:
a cabinet body;
a particulate filter cleaning device; and
a control device for controlling the operation of the particulate filter cleaning device,
wherein the particulate filter cleaning apparatus is the particulate filter cleaning apparatus according to claim 9.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202110678588.6A CN113202601A (en) | 2021-06-18 | 2021-06-18 | Heating unit, particle filter cleaning device and equipment |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202110678588.6A CN113202601A (en) | 2021-06-18 | 2021-06-18 | Heating unit, particle filter cleaning device and equipment |
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| CN113202601A true CN113202601A (en) | 2021-08-03 |
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