WO2022262025A1 - Équipement de nettoyage automatique pour filtre à particules diesel - Google Patents

Équipement de nettoyage automatique pour filtre à particules diesel Download PDF

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Publication number
WO2022262025A1
WO2022262025A1 PCT/CN2021/105487 CN2021105487W WO2022262025A1 WO 2022262025 A1 WO2022262025 A1 WO 2022262025A1 CN 2021105487 W CN2021105487 W CN 2021105487W WO 2022262025 A1 WO2022262025 A1 WO 2022262025A1
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WIPO (PCT)
Prior art keywords
temperature
unit
heating
air flow
control unit
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PCT/CN2021/105487
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English (en)
Chinese (zh)
Inventor
项昶斌
张秦涛
李建臣
陈立峰
齐明武
娄立武
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浙江银轮智能装备有限公司
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Publication of WO2022262025A1 publication Critical patent/WO2022262025A1/fr

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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
    • 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
    • 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
    • F01N3/08—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous
    • F01N3/10—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by thermal or catalytic conversion of noxious components of exhaust
    • F01N3/18—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by thermal or catalytic conversion of noxious components of exhaust characterised by methods of operation; Control
    • F01N3/20—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by thermal or catalytic conversion of noxious components of exhaust characterised by methods of operation; Control specially adapted for catalytic conversion ; Methods of operation or control of catalytic converters
    • F01N3/2066—Selective catalytic reduction [SCR]
    • 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

Definitions

  • the invention belongs to the technical field of particle filter cleaning, and in particular relates to automatic cleaning equipment for particle filters.
  • the exhaust system of a diesel vehicle includes an exhaust pipe and a particulate filter (Diesel Particulate Filter, DPF for short) arranged in the exhaust pipe.
  • DPF Diesel Particulate Filter
  • the exhaust gas in the exhaust pipe passes through the DPF, the particulate matter and oil in the exhaust gas are absorbed by the filter element of the DPF. Adsorption filtration.
  • the particulate matter and oil pollution inside the DPF filter element also accumulates, resulting in an increase in the exhaust back pressure of the vehicle, an increase in the fuel consumption of the vehicle and a decrease in power.
  • the DPF filter element is severely clogged, the exhaust gas cannot be discharged.
  • the conventional solution to the above problems is to regularly remove the DPF from the exhaust system of a diesel vehicle and clean it (clean up) to restore it to its normal working level.
  • the existing DPF cleaning method is mainly based on heating and regenerative cleaning, that is, the particles and oil stains accumulated on the DPF are burned to achieve cleaning through different heating methods.
  • the existing heating regeneration has more or less disadvantages, for example: the fuel injection heating regeneration cleaning method requires additional fuel and high cost; the ordinary electric heating regeneration cleaning method will cause uneven heating, which will lead to DPF The cleaning effect is poor, and causes local overheating and damage of the DPF; the microwave heating regenerative cleaning method needs to overcome the technical difficulty of how to excite as many modes as possible in the resonant cavity to achieve heating; the infrared heating device involved in the infrared heating regenerative cleaning method costs high.
  • the existing heating regeneration cleaning method is easy to damage the DPF, the cost of related equipment is high, and the related technology is immature, so it cannot clean the DPF efficiently and non-destructively at low cost, and the cleaning effect is poor.
  • the present invention provides an automatic particle filter cleaning device, which is used for heating and cleaning the particle filter, and is characterized in that it comprises: a particle filter cleaning device, used for cleaning the particle filter; and a control device, used for The operation of the particle filter cleaning device is controlled, wherein the particle filter cleaning device includes: a cleaning chamber for placing the particle filter; a heating unit for heating the air flow; an air flow drive unit for An air flow provides a driving force for the flow; an air intake unit for admitting external air into the cleaning chamber having an intake valve for controlling the intake of external air; and a process temperature sensor for sensing entry into the cleaning chamber The temperature of the air flow in the chamber is used as the treatment temperature, and the control device controls the intake valve, the heating unit and the air flow driving unit based on the treatment temperature and the predetermined heat treatment curve, so that the treatment temperature conforms to the predetermined heat treatment curve.
  • the particle filter cleaning device includes: a cleaning chamber for placing the particle filter; a heating unit for heating the air flow; an air flow drive unit for An air flow provides a
  • the particle filter automatic cleaning equipment provided by the present invention may also have such technical features, wherein the particle filter cleaning device further includes an air flow input unit, which is used to input the high-temperature air flow formed by heating the heating unit into the cleaning chamber , the processing temperature sensor is arranged in the boundary area between the air flow input unit and the cleaning chamber, the control device has a timing unit, a current target temperature acquisition unit, a temperature comparison unit and a control unit, and the control unit starts to clean the particulate filter , control the timing unit to start timing so as to obtain the current processing time in real time, the current target temperature acquisition unit acquires the temperature corresponding to the current processing time on the predetermined heating treatment curve according to the current processing time as the current target temperature, and the control unit obtains the temperature corresponding to the current processing time from the processing temperature sensor in real time Obtain the processing temperature as the current processing temperature respectively, and control the temperature comparison unit to compare the current processing temperature and the current target temperature to obtain a comparison result, and the control unit compares at least one of the intake valve, the heating unit and the
  • the particulate filter automatic cleaning equipment provided by the present invention may also have such technical features, wherein the control unit has an intake valve control unit, and when the comparison result shows that the current processing temperature is higher than the current target temperature, the intake valve control unit controls Increase the opening degree of the intake valve, thereby reducing the current processing temperature, and when the comparison result shows that the current processing temperature is lower than the current target temperature, the intake valve control unit controls the intake valve to reduce the opening degree, thereby increasing the current processing temperature .
  • the particle filter automatic cleaning equipment provided by the present invention can also have such technical features, wherein the control unit has a heating control part, and when the comparison result shows that the current processing temperature is higher than the current target temperature, the heating control part controls the heating unit to reduce the power , so that the current processing temperature decreases. When the comparison result shows that the current processing temperature is lower than the current target temperature, the heating control part controls the heating unit to increase the power, thereby increasing the current processing temperature.
  • the particle filter automatic cleaning equipment provided by the present invention may also have such technical features, wherein the control unit has a drive control part, and when the comparison result shows that the current processing temperature is higher than the current target temperature, the drive control part controls the air flow drive unit Increase the driving force so that the current processing temperature decreases, and when the comparison result shows that the current processing temperature is lower than the current target temperature, the drive control part controls the air flow driving unit to weaken the driving force, thereby increasing the current processing temperature.
  • the particle filter automatic cleaning equipment provided by the present invention can also have such technical features, wherein the particle filter cleaning device also includes an air flow output unit for outputting the high-temperature air flow in the cleaning chamber and an airflow output unit arranged in the cleaning chamber
  • the auxiliary temperature sensor on the indoor or air flow output unit also has a temperature difference judgment unit, the control unit has a drive control part, the control unit obtains the temperature sensed by the auxiliary temperature sensor in real time as the current auxiliary temperature, and controls the temperature
  • the difference judging unit judges whether the difference between the current processing temperature and the current auxiliary temperature is smaller than a predetermined temperature difference threshold, and the drive control part controls the air flow driving unit to weaken the driving force when the temperature difference judging unit judges no.
  • the particle filter automatic cleaning equipment provided by the present invention can also have such technical features, wherein the particle filter cleaning device also includes an air flow output unit for outputting the high-temperature air flow in the cleaning chamber, and is arranged in the cleaning chamber
  • the first auxiliary temperature sensor in the room and the second auxiliary temperature sensor installed on the air flow output unit the control device also has an auxiliary temperature average calculation unit and a temperature difference judgment unit, the control unit has a drive control part, and the control unit real-time Acquiring the temperature sensed by the first auxiliary temperature sensor as the first current auxiliary temperature, obtaining the temperature sensed by the second auxiliary temperature sensor as the second current auxiliary temperature, and controlling the auxiliary temperature average calculation unit to calculate the first current auxiliary temperature
  • the mean value of the second current auxiliary temperature is used as the average auxiliary temperature
  • the control unit controls the temperature difference judgment unit to judge whether the difference between the current processing temperature and the average auxiliary temperature is less than a predetermined temperature difference threshold, and the drive control part is in the temperature difference judgment unit When the judgment is negative, the
  • the particle filter automatic cleaning equipment provided by the present invention can also have such technical features, wherein the control device also has a judgment unit for the end of the high temperature maintenance stage and a judgment unit for the end of the first cooling stage, and the control unit includes an intake valve control unit, an exhaust The air valve control part, the backflow valve control part, the heating control part and the drive control part, the particle filter cleaning device also includes: an exhaust unit for discharging the high-temperature air flow, having a device for controlling the discharge of the high-temperature air flow The exhaust valve, the air flow return unit, returns the high-temperature air flow from the air flow output unit to circulate the high-temperature air flow, and has a return valve for controlling the return flow of the high-temperature air flow.
  • the predetermined heating treatment curve includes at least In the high temperature maintenance stage, the first cooling stage and the second cooling stage, the high temperature air flow is maintained at a temperature of 550°C to 700°C during the high temperature maintenance stage, and the duration of the high temperature maintenance stage is 5min-30min, and the judging unit judges the end of the high temperature maintenance stage Whether the current processing time has reached the end time of the high temperature maintenance stage, when the high temperature maintenance stage ends judging unit judges yes, the heating control part controls the heating unit to stop processing, the intake valve control part controls the intake valve to increase the opening degree, and the first cooling The stage end judging unit judges whether the current processing time has reached the end time of the first cooling stage, and when the judgment of the first cooling stage ending judging unit is yes, the intake valve control part controls the intake valve to fully open, and the exhaust valve control part controls The exhaust valve is opened, and at the same time, the return valve control part controls the return valve to close.
  • the particle filter automatic cleaning equipment provided by the present invention can also have such technical features, wherein the control device also has a curve storage unit, a model input unit and a heating curve determination unit, and the curve storage unit stores models of different particle filters and The heating treatment curve corresponding to the model, the model input unit is used to allow the operator to input the model of the particulate filter to be cleaned, and the heating curve determination unit determines the corresponding heating treatment curve from the curve storage unit according to the input model as the scheduled heating Process curves.
  • the particle filter automatic cleaning equipment provided by the present invention may also have such technical features, wherein the control device further includes a display unit and a picture storage unit, and the picture storage unit stores a temperature display picture.
  • the control unit controls the display unit to display the temperature display screen and the predetermined heat treatment curve, and displays the current treatment temperature in real time.
  • the particulate filter cleaning system in the present invention can clean particulate filters, such as diesel particulate filter (Diesel Particulate Filter, DPF for short), gasoline particulate filter (Gasoline Particulate Filter, GPF for short), etc.
  • particulate filters such as diesel particulate filter (Diesel Particulate Filter, DPF for short), gasoline particulate filter (Gasoline Particulate Filter, GPF for short), etc.
  • the particle filter cleaning system can also clean other parts in the exhaust system of fuel vehicles that need to regularly clean particles, such as the oxidation catalytic converter (Diesel Oxidation Catalyst, referred to as DOC), exhaust gas recirculation system (Exhaust Gas Recirculation system) -circulation, referred to as EGR), selective catalytic reduction system (Selective Catalytic Reduction, referred to as SCR) and other parts involved in cleaning; and, only need to place these parts to be cleaned in the cleaning chamber of the equipment , to ensure that the high-temperature air flow can pass through the interior of these parts, and cleaning can be realized.
  • the oxidation catalytic converter Diesel Oxidation Catalyst, referred to as DOC
  • EGR exhaust Gas Recirculation system
  • SCR selective catalytic reduction system
  • other parts involved in cleaning and, only need to place these parts to be cleaned in the cleaning chamber of the equipment , to ensure that the high-temperature air flow can pass through the interior of
  • the processing temperature sensor can sense the temperature of the air flow entering the cleaning chamber as the processing temperature, and then the control device controls the intake valve, The heating unit and the air flow driving unit are controlled so that the treatment temperature conforms to the predetermined heating treatment curve. Therefore, the treatment temperature can be made to conform to the theoretical heating treatment curve, so as to ensure that the particulate filter can be heated and cleaned accurately according to the predetermined heating treatment curve, thereby enabling The cleaning is completed quickly, and the heating is uniform, and the particle filter can be cleaned without damage, and has a good cleaning effect.
  • Fig. 1 is a structural block diagram of a particle filter automatic cleaning device according to Embodiment 1 of the present invention
  • FIG. 2 is a schematic structural view of a particle filter cleaning device according to Embodiment 1 of the present invention.
  • Embodiment 3 is a schematic diagram of a predetermined heat treatment curve in Embodiment 1 of the present invention.
  • Fig. 4 is a comparison diagram between the predetermined heat treatment curve and the actual heat treatment curve in Example 1 of the present invention.
  • Fig. 5 is a flow chart of the working process of the particle filter automatic cleaning device according to Embodiment 1 of the present invention.
  • Fig. 6 is a functional block diagram of the particle filter automatic cleaning device and control device in the second embodiment of the present invention.
  • Fig. 7 is a flow chart of the cleaning steps of the particle filter in the second embodiment of the present invention.
  • Fig. 8 is a functional block diagram of the particle filter automatic cleaning device and control device in Embodiment 3 of the present invention.
  • Fig. 9 is a flow chart of the cleaning steps of the particle filter in the third embodiment of the present invention.
  • Fig. 10 is a functional block diagram of the particle filter automatic cleaning device and control device in Embodiment 4 of the present invention.
  • Fig. 11 is a flow chart of cleaning steps of the particle filter in Embodiment 4 of the present invention.
  • Fig. 12 is a functional block diagram of the particle filter automatic cleaning device and control device in Embodiment 5 of the present invention.
  • Fig. 13 is a flowchart of the cleaning steps of the particle filter in Embodiment 5 of the present invention.
  • Fig. 14 is a schematic diagram of a theoretical heat treatment curve in a modified example of the present invention.
  • Fig. 1 is a structural block diagram of an automatic cleaning device for a particle filter according to Embodiment 1 of the present invention.
  • the automatic particulate filter cleaning device of the present invention includes a particulate filter cleaning device 3 and a control device 4 .
  • the particle filter cleaning device 3 is used to clean the particle filter.
  • the control device 4 is electrically connected with the particle filter cleaning device 3 and can control the operation of the particle filter cleaning device 3 .
  • Fig. 2 is a schematic structural view of a particle filter cleaning device according to Embodiment 1 of the present invention.
  • the particle filter cleaning device 3 includes an air flow drive unit 6 , an air flow return unit 7 , a heating unit 8 , an air flow input unit 9 , a cleaning chamber 10 , an air flow output unit 11 , and an air intake unit 32 , exhaust unit 33 , process temperature sensor 40 , first auxiliary temperature sensor 41 and second auxiliary temperature sensor 42 .
  • the air flow driving unit 6 has a driving motor 12 , a blower 13 , a driving pipe 14 , an air inlet 15 and an air outlet 16 , and can provide driving force for the air flow.
  • the driving motor 12 is installed on the top of the cabinet, and the blower 13 is connected to the output end of the driving motor 12.
  • the blower 13 can suck air from the air inlet 15 under the driving of the driving motor 12, and discharge from the air outlet 16 after generating an air flow.
  • the air flow recirculation unit 7 is a conveying pipeline, which recirculates the high temperature air flow from the air flow output unit 11 to circulate the high temperature air flow, and has a return valve 37 for controlling the reflow of the high temperature air flow.
  • the heating unit 8 communicates with the air flow return unit 7 and can heat the air flow delivered by the air flow return unit 7 to form a high temperature air flow.
  • the air flow input unit 9 is a pipe, communicated with the heating unit 8 , and inputs the high-temperature air flow formed by heating the heating unit 8 into the cleaning chamber 10 .
  • the cleaning chamber 10 is a cuboid box, including a heat-insulating cavity and a heat-insulating door installed on the heat-insulating cavity. Through hole 31 .
  • the cleaning chamber 10 is located above the heating unit 8 and communicates with the air flow input unit 9 .
  • the particle filter is placed in the cleaning chamber 10, and the high-temperature air flow generated by the heating unit 8 enters the cleaning chamber 10 through the air flow input unit 9 to clean the particles deposited in the particle filter.
  • the air flow output unit 11 is a pipeline, which is respectively connected with the cleaning chamber 10 and the air flow driving unit 6 , and can deliver the high temperature air flow in the cleaning chamber 10 to the air flow driving unit 6 .
  • the air intake unit 32 is a pipeline capable of introducing external air into the cleaning chamber 10 and has an air intake valve 38 for controlling the intake of external air.
  • the exhaust unit 33 is a pipe, communicated with the air flow drive unit 6, capable of discharging the high temperature air flow, and has an exhaust valve 39 for controlling the discharge of the high temperature air flow.
  • the intake valve 38 , the exhaust valve 39 and the return valve 37 are all electrically controlled valves.
  • the processing temperature sensor 40 is a temperature sensor, which is arranged in the boundary area between the airflow input unit 9 and the cleaning chamber 10, and can sense the temperature of the high-temperature airflow entering the cleaning chamber 10 as the processing temperature.
  • the first auxiliary temperature sensor 41 is a temperature sensor, which is arranged in the cleaning chamber 10 and close to the air flow output unit 11 , and can sense the temperature of the air flow passing through the particulate filter as the first auxiliary temperature.
  • the second auxiliary temperature sensor 42 is a temperature sensor, which is arranged on the air flow output unit 11 and can sense the temperature of the air flow after passing through the particulate filter as the second auxiliary temperature.
  • the control device 4 has a control unit 74, a picture storage unit 60, a curve storage unit 61, a model input unit 62, a heating curve determination unit 63, a timing unit 64, a current target temperature acquisition unit 65, a display unit 66, and a heating stage end judgment unit 67 , high temperature maintenance stage end judging unit 68, temperature comparison unit 69, first cooling stage ending judging unit 70, second cooling stage ending judging unit 72, auxiliary temperature average calculation unit 73 and temperature difference judging unit 74.
  • control unit 74 has an intake valve control unit 743 , a return valve control unit 741 , an exhaust valve control unit 744 , a heating control unit, and a drive control unit.
  • the screen storage unit 60 stores a temperature display screen.
  • the curve storage unit 61 stores different models of particulate filters and heat treatment curves corresponding to the models.
  • the operator Before automatic cleaning of the particle filter automatic cleaning device, the operator places the particle filter to be cleaned in the cleaning chamber 10 and inputs the model of the particle filter to be cleaned through the model input unit 62 .
  • the model input unit 62 is a liquid crystal display, which is set on the particle filter cleaning device 3, and the operator selects the model of the particle filter to be cleaned on the liquid crystal display.
  • the heating curve determining unit 63 determines a corresponding heating treatment curve from the curve storage unit 61 according to the model input by the operator as a predetermined heating treatment curve.
  • the control unit 74 controls the display unit 66 to display the temperature display screen and the predetermined heating treatment curve.
  • Fig. 3 is a schematic diagram of a predetermined heat treatment curve according to Embodiment 1 of the present invention.
  • the predetermined heat treatment curve includes a temperature rising stage, a high temperature maintaining stage, a first temperature falling stage and a second temperature falling stage.
  • the heating stage further includes a first heating sub-stage, a stable sub-stage and a second heating sub-stage.
  • the initial temperature in the first heating sub-stage is T 0 , after heating for the preheating time t 1 , the temperature is raised to the preheating temperature T 1 , thus entering the steady substage; in the steady substage, the temperature is kept at the preheating temperature T 1 , until the steady time t 2 passes, enter the second heating sub-stage; in the second heating sub-stage, after the heating time t 3 , the temperature rises from the preheating temperature T 1 to the cleaning temperature T 2 , and then enters the high temperature maintenance stage.
  • the sum of the preheating time t 1 , the steady time t 2 and the heating time t 3 is the first predetermined time
  • the first predetermined time is 10min-20min
  • the preheating time t 1 is 1min-5min
  • the steady time t2 is 3min -8min
  • the initial temperature T 0 is 25°C to 100°C
  • the preheating temperature T 1 is 250°C to 350°C
  • the cleaning temperature T 2 is 550°C to 700°C.
  • the preheating time t1 is 3min
  • the steady time t2 is 5min
  • the heating time t3 is 7min
  • the initial temperature T0 is room temperature
  • the preheating temperature T1 is 300°C
  • the cleaning temperature T2 is 600°C.
  • the temperature is kept at the cleaning temperature T2 (i.e. the temperature at which the high temperature air flow is maintained during the high temperature maintenance stage), and after the cleaning time t4 (i.e. the duration of the high temperature maintenance stage), enters the first temperature drop stage.
  • the cleaning time t4 is 10min - 20min.
  • the cleaning time t4 is 15 minutes.
  • the temperature drops from the cleaning temperature T 2 to the pre-cooling temperature T 3 , and then enters the second cooling stage.
  • the pre-cooling time t 5 is 3min-7min
  • the pre-cooling temperature T 3 is 450°C-500°C.
  • the pre-cooling time t 5 is 5 minutes, and the pre-cooling temperature T 3 is 480°C.
  • the temperature drops from the precooling temperature T 3 to the removal temperature T 4 over a cooling time t 6 , so that the particle filter can be removed.
  • the cooling time t6 is 8min - 15min
  • the take-out temperature T4 is 25 °C-100°C.
  • the cooling time t6 is 10min
  • the take - out temperature T4 is room temperature .
  • the initial temperature T 0 is room temperature; when the particle filter automatic cleaning device works continuously to clean the second particle filter, the starting temperature The initial temperature T'0 is higher than room temperature and lower than the pre-cooling temperature.
  • control unit 74 controls the timing unit 64 to start timing so as to obtain the current processing time in real time.
  • the current target temperature acquiring unit 65 acquires a temperature corresponding to the current processing time on a predetermined heat treatment curve as the current target temperature according to the current processing time.
  • Fig. 4 is a comparison chart between the predetermined heat treatment curve and the actual heat treatment curve in Example 1 of the present invention.
  • control unit 74 obtains the processing temperature from the processing temperature sensor 40 in real time as the current processing temperature respectively, and at the same time, the display unit 66 displays the current processing temperature in real time, so that the operator can always observe the difference between the current processing temperature and the current target temperature. difference between.
  • the control unit 74 controls the temperature comparison unit 69 to compare the values of the current processing temperature and the current target temperature to obtain a comparison result.
  • the control unit 74 controls the opening and closing state of the intake valve 38 in real time according to the difference between the current treatment temperature and the current target temperature, so that the actual heat treatment curve formed by each current treatment temperature conforms to the predetermined heat treatment curve. specifically:
  • the backflow valve control part 741 controls the backflow valve 37 to open
  • the exhaust valve control part 744 controls the exhaust valve 39 to close
  • the drive control part controls the air flow drive unit 6
  • the blower 13 in the middle starts to work and maintains a certain power, so that the air flow can flow from the drive pipe 14 to the air flow return unit 7, and then flow through the heating unit 8, the air flow input unit 9, the cleaning chamber 10, the air
  • the flow output unit 11 and the air flow driving unit 6 form a circulating flow.
  • the heating control part controls the heating unit 8 to start working, maintains a certain power, and heats the air flow passing through the heating unit 8.
  • the air intake valve control part 743 controls the air intake valve 38 to close, thereby cutting off the access of external air, further making The high-temperature air flow is continuously heated by the heating unit 8 in the circulating flow to form a high-temperature air flow.
  • control unit 74 controls the end judging unit 67 of the heating phase to determine whether the current processing time has reached the end time of the first heating sub-phase, whether it has reached the end time of the steady sub-phase, and whether it has reached the end time of the second heating sub-phase.
  • the judging unit 67 of the end of the heating phase judges that the current processing time reaches the end time of the first heating sub-phase, the particulate filter cleaning process enters the stable sub-phase from the first heating sub-phase, and the intake valve control unit 743 controls the intake valve 38 to increase the temperature.
  • the degree of opening is large, so that the current processing temperature is maintained at the preheating temperature T 1 .
  • the particle filter cleaning process enters the second heating sub-stage from the stable sub-stage, and the intake valve control unit 743 controls the intake valve 38 to decrease to open. To a certain extent, the cold air entering the cleaning chamber 10 becomes less, and the current processing temperature can continue to rise.
  • the judging unit 67 judges that the current processing time reaches the end time of the second heating sub-phase, the particulate filter cleaning process enters the high temperature maintenance phase from the heating phase, and the intake valve control unit 743 controls the intake valve 38 to increase the opening degree. , so that the current processing temperature remains at the cleaning temperature T 2 .
  • control unit 74 controls the high temperature maintenance phase end judging unit 68 to judge whether the current processing time reaches the end time of the high temperature maintenance phase.
  • the heating control unit controls the heating unit 8 to stop processing, and the intake valve control unit 743 controls the intake valve 38 to increase the temperature. Large opening degree.
  • control unit 74 obtains the temperature sensed by the first auxiliary temperature sensor 41 as the first current auxiliary temperature in real time, and obtains the temperature sensed by the second auxiliary temperature sensor 42 as the second current temperature. auxiliary temperature.
  • control unit 74 controls the average auxiliary temperature calculation unit 73 to calculate the average value of the first current auxiliary temperature and the second current auxiliary temperature as the average auxiliary temperature.
  • control unit 74 controls the temperature difference judging unit 74 to judge whether the difference between the current processing temperature and the average auxiliary temperature is smaller than a predetermined temperature difference threshold.
  • the control unit 74 acquires the next first current auxiliary temperature and the next second current auxiliary temperature, and then controls the auxiliary temperature average calculation unit 73 to perform calculation, and then controls the temperature difference judging unit Step 74 is further judged, and the cycle continues until the end judging unit 68 of the high temperature maintenance phase judges that the end time of the high temperature maintenance phase has been reached.
  • the drive control unit controls the air flow drive unit 6 to weaken the driving force, thereby reducing the flow rate of the high-temperature air.
  • the particle filter can fully contact with the high-temperature air flow, and the particle filter The combustion of oil and particles is more complete, which improves the cleaning efficiency.
  • the end judging unit 70 of the first cooling stage judges whether the current processing time reaches the ending time of the first cooling stage.
  • control unit 74 controls the end judging unit 70 of the first cooling stage to judge whether the current processing time reaches the end time of the first cooling stage.
  • the particulate filter cleaning process enters the second cooling stage from the first cooling stage, and the intake valve control unit 743 controls the intake valve 38 to fully open.
  • the exhaust valve control unit 744 controls the exhaust valve 39 to open, so that the high-temperature air flow in the cleaning chamber 10 flows from the air flow driving unit 6 to the exhaust unit 33 , and then is discharged from the particle filter cleaning device 3 .
  • the backflow valve control part 741 controls the backflow valve 37 to close, so that the high-temperature air in the air flow backflow unit 7 and the heating unit 8 stays in these two units and maintains a certain residual temperature, which is convenient for the heating unit 8 in the next cleaning process.
  • the air can be heated on the basis of residual temperature.
  • the intake valve control unit 743 performs feedback control on the intake valve 38 according to the comparison result.
  • the intake valve control unit 743 controls the intake valve 38 to increase the opening degree, thereby increasing the cold air entering the cleaning chamber 10 and reducing the current processing temperature.
  • the intake valve control unit 743 controls the intake valve 38 to reduce the opening degree, thereby reducing the cold air entering the cleaning chamber 10 and increasing the current processing temperature.
  • the actual heat treatment curve formed by the current treatment temperature at each moment can be made to conform to the theoretical heat treatment curve.
  • control unit 74 controls the end judging unit 72 of the second cooling stage to judge whether the current processing time reaches the ending time of the second cooling stage.
  • the intake valve control unit 743 controls the intake valve 38 to maintain a fully open state
  • the exhaust valve control unit 744 controls the exhaust valve 39 Leave it fully open.
  • the judgment unit 72 of the end of the second cooling stage judges that the end time of the second cooling stage is reached, the cleaning of the particle filter is finished, and the operator and manager can take out the cleaned particle filter from the particle filter cleaning device 3 .
  • Fig. 5 is a flow chart of the working process of the particle filter automatic cleaning device according to the first embodiment of the present invention.
  • the working process of the particle filter automatic cleaning equipment includes the following steps:
  • Step S1 the model input unit 62 allows the operator to input the model of the particle filter to be cleaned, and then enters step S2;
  • Step S2 the heating curve determination unit 63 determines the corresponding heating treatment curve from the curve storage unit 61 according to the model input by the operator, as a predetermined heating treatment curve, and then enters step S3;
  • Step S3 the control unit 74 controls the corresponding units to be set to the initial state, that is, the backflow valve control part 741 controls the backflow valve 37 to open, the exhaust valve control part 744 controls the exhaust valve 39 to close, and the drive control part controls the air flow in the drive unit 6.
  • the blower 13 starts to work and maintains a certain power, the heating control part controls the heating unit 8 to start working, the intake valve control part 743 controls the intake valve 38 to close, and then enters step S4;
  • step S4 the timing unit 64 starts timing, and then enters step S5;
  • Step S5 the control unit 74 obtains the current processing time from the timing unit 64, and the current target temperature obtaining unit 65 obtains the temperature corresponding to the current processing time on the predetermined heat treatment curve according to the current processing time as the current target temperature.
  • the processing temperature sensor 40 obtains the processing temperature in real time respectively as the current processing temperature, and then enters step S6;
  • Step S6 the control unit 74 controls the temperature comparison unit 69 to compare the values of the current processing temperature and the current target temperature to obtain a comparison result, and then proceed to step S7;
  • Step S7 the control unit 74 controls the end judgment unit 70 of the first cooling stage to judge whether the current processing time has reached the end time of the first cooling stage, if it is judged to be no, enter step S8, and if it is judged to be yes, enter step S9;
  • Step S8-1 the intake valve control unit 743 controls the increase or decrease of the opening degree of the intake valve 38 according to the comparison result, so that the curve formed by each current treatment temperature conforms to the predetermined heat treatment curve, and then enters step S5;
  • step S9 the intake valve control unit 743 controls the intake valve 38 to fully open, and the exhaust valve control unit 744 controls the exhaust valve 39 to open, so that the high-temperature air flow in the cleaning chamber 10 flows from the air flow drive unit 6 to the exhaust valve.
  • the air unit 33 is then discharged from the particulate filter cleaning device 3.
  • the return valve control part 741 controls the return valve 37 to close, so that the high temperature air in the air flow return unit 7 and the heating unit 8 stays in these two units and Keep a certain residual temperature, and then enter step S10;
  • Step S10 the control unit 74 controls the second cooling stage end judging unit 72 to judge whether the current processing time reaches the end time of the second cooling stage, until it is judged to be yes, enter step S11;
  • step S11 the cleaning of the particulate filter is completed, and the operation and management personnel can take out the cleaned particulate filter from the particulate filter cleaning device 3, and then enter the end state.
  • the control device since the processing temperature sensor can sense the temperature of the air flow entering the cleaning chamber as the processing temperature, the control device further performs the processing based on the processing temperature and the predetermined heating processing curve.
  • the air valve, heating unit and air flow driving unit are controlled so that the treatment temperature conforms to the predetermined heating treatment curve, so that the treatment temperature can conform to the theoretical heating treatment curve, ensuring that the particle filter can be heated and cleaned accurately according to the predetermined heating treatment curve , so that the cleaning can be completed quickly, and the heating is uniform, and the particle filter can be cleaned without damage, and has a good cleaning effect.
  • the first auxiliary temperature sensor 41 and the second auxiliary temperature sensor 42 can sense the temperature of the air flow after passing through the particle filter, and then according to the difference between the average value of the air flow temperature at the two places and the current processing temperature Determine whether it is necessary to control the blower 13 in the air flow driving unit 6 to weaken the driving force. Therefore, it is possible to avoid the problem that the particulate filter cannot fully absorb the heat energy in the temperature-sensitive air flow because the air flow velocity is too fast, so that The cleaning process of the particle filter has a high efficiency.
  • model input unit 62 and the heating curve determining unit 63 can determine the corresponding predetermined heating treatment curve according to the model of the particulate filter to be cleaned, it can be applied to different types of particulate filters.
  • the display part displays the current processing temperature and the predetermined heating processing curve in real time
  • the operator can observe the cleaning stage and processing temperature of the filter cleaning in real time, and take emergency measures if any abnormal situation is found.
  • the intake valve control unit 743 performs feedback control on the intake valve 38 according to the comparison result, so that the current processing temperature conforms to the current target temperature.
  • the heating control unit performs feedback control on the heating unit 8 according to the comparison result, so that the current processing temperature conforms to the current target temperature.
  • Fig. 6 is a functional block diagram of the particle filter automatic cleaning device and the control device in the second embodiment of the present invention.
  • control unit 74' of the control device 4' has an intake valve control part 742' and a heating control part 744' having different control functions from those in the first embodiment. specifically:
  • the heating control part 744′ will control the heating unit 8 according to the comparison result. Feedback control is performed, and compensation control is performed on the heating unit 8 according to the actual temperature change rate.
  • the heating control part controls the heating unit 8 to reduce the power, so that the temperature of the high-temperature air flow heated by the heating unit 8 decreases, so that the current processing temperature decreases.
  • the heating control part controls the heating unit 8 to increase the power, so that the temperature of the high-temperature air flow heated by the heating unit 8 increases, so that the current processing temperature increases.
  • the actual heat treatment curve formed by the current treatment temperature at each moment can strictly conform to the theoretical heat treatment curve only by controlling the heating unit 8 .
  • the intake valve control unit 742' always controls the intake valve 38 to keep closed.
  • the heating control part 744' controls the heating unit 8 to close, and the intake valve control part 742' performs feedback control on the intake valve.
  • the feedback control process in the first cooling stage is the same as that in Embodiment 1, and will not be repeated here.
  • Fig. 7 is a flowchart of cleaning steps of the particulate filter in the second embodiment of the present invention.
  • the difference between the particle filter cleaning step of the second embodiment and the first embodiment is that there is an additional temperature control step between step S6 and step S7, namely:
  • Step S12-2 the judging unit for the end of the high temperature maintenance phase judges whether the current processing time has reached the end time of the high temperature maintenance phase, if it is judged to be otherwise, go to step S13-2, if it is judged to be yes, go to step S7;
  • step S13-2 the heating control unit 744' controls the heating unit 8 to increase or decrease the power according to the predetermined change value according to the comparison result, and then enters step S5.
  • the heating unit 8 is feedback-controlled by the heating control part 744 ′ And to make the current treatment temperature conform to the theoretical heat treatment curve.
  • the heating control unit 744' controls the heating unit 8 to close, and the intake valve control unit 742' performs feedback control on the intake valve 38 so that the current treatment temperature conforms to the theoretical heating treatment curve.
  • the power of the heating unit is controlled by the heating control part according to the comparison result and the actual temperature change rate, so that only the heating unit is controlled. Make the current treatment temperature conform to the theoretical heat treatment curve.
  • the intake valve control unit 743 performs feedback control on the intake valve 38 according to the comparison result, so that the current processing unit performs a feedback control on the intake valve 38 according to the comparison result.
  • Feedback control at the same time, the drive control part performs feedback control on the blower 13 according to the comparison result, so that the current processing temperature can meet the current target temperature more quickly.
  • Fig. 8 is a functional block diagram of the particle filter automatic cleaning device and the control device in the third embodiment of the present invention.
  • control unit 74 ′′ of the control device 4 ′′ has an intake valve control part 742 ′′ and a drive control part 745 ′′ that have different control functions from those in the first embodiment. specifically:
  • the air valve control unit 742 ′′ and the drive control unit 745 ′′ respectively perform feedback control on the intake valve 38 and the blower 13 according to the comparison result.
  • the drive control part controls the blower 13 in the air flow drive unit 6 to increase the driving force, and at the same time, the intake valve control part 743 controls the intake valve 38 to increase the degree of opening, thereby Make the current processing temperature drop faster.
  • the drive control part controls the blower 13 in the air flow drive unit 6 to weaken the driving force, and at the same time, the intake valve control part 743 controls the intake valve 38 to reduce the opening degree, thereby Make the current processing temperature rise faster.
  • the actual heat treatment curve formed by the current treatment temperature at each moment can strictly conform to the theoretical heat treatment curve through the combined control of the intake valve 38 and the blower 13 .
  • Fig. 9 is a flow chart of cleaning steps of the particle filter in the third embodiment of the present invention.
  • step S8 is different, and the step S8-3 of the third embodiment is specifically as follows:
  • Step S8-3 the intake valve control part controls the intake valve to increase or decrease the opening degree according to the comparison result, and at the same time, the drive control part controls the blower to increase or decrease the driving force according to the comparison result, and then enters step S5.
  • Embodiment 3 since the opening degree of the intake valve and the power of the blower are respectively controlled by the intake valve control unit and the drive control unit according to the comparison results, So that the current processing temperature conforms to the theoretical heating processing curve.
  • the intake valve control unit 743 performs feedback control on the intake valve 38 according to the comparison result, so that the current processing temperature conforms to the current target temperature.
  • the heating control section performs feedback control on the heating unit 8 according to the comparison result
  • the drive control section performs feedback control on the blower 13 in the air flow drive unit 6 according to the comparison result, so that the current The process temperature more quickly matches the current target temperature.
  • Fig. 13 is a functional block diagram of the particle filter automatic cleaning device and the control device in the fourth embodiment of the present invention.
  • control unit 74"' of the control device 4"' has a heating control part 742"' and a drive control part 745"' which have different control functions from those in the first embodiment. specifically:
  • control unit 742''' and the drive control unit 745''' respectively perform feedback control on the heating unit 8 and the blower 13 according to the comparison result. which is:
  • the drive control part 745"' controls the blower 13 in the air flow drive unit 6 to increase the driving force, and at the same time, the heating control part 742"' controls the heating unit to reduce the power, so that The current process temperature is lowered faster.
  • the drive control part 745"' controls the blower 13 in the air flow drive unit 6 to weaken the driving force, and at the same time, the heating control part 742"' controls the heating unit to increase the power, so that The current process temperature rises faster.
  • the actual heat treatment curve formed by the current treatment temperature at each moment can strictly conform to the theoretical heat treatment curve through the combined control of the heating unit and the blower.
  • the intake valve control part 742"' always controls the intake valve 38 to keep closed.
  • the heating control part 744"' when the current processing time is in the first temperature drop stage, the heating control part 744"' The heating unit 8 is controlled to be turned off, and the intake valve control unit 742"' performs feedback control on the intake valve.
  • the feedback control process of the first cooling stage in the first cooling stage is the same as that in Embodiment 1, and will not be repeated here.
  • Fig. 11 is a flow chart of cleaning steps of the particulate filter in Embodiment 4 of the present invention.
  • step S8 is different, and the step S8-4 in the third embodiment is as follows:
  • step S8-4 the heating control part controls the heating unit to increase or decrease the power according to the comparison result, and at the same time, the drive control part controls the blower to increase or decrease the driving force according to the comparison result, and then enters step S5.
  • the intake valve control unit 743 performs feedback control on the intake valve 38 according to the comparison result, so that the current processing temperature conforms to the current target temperature.
  • the intake valve control unit 743, the drive control unit, and the heating control unit simultaneously control the corresponding intake valve 38, the blower 13 in the air flow drive unit 6, and the heating unit 8 according to the comparison results. Feedback control is performed so that the current processing temperature conforms to the current target temperature.
  • Fig. 12 is a functional block diagram of an automatic cleaning device and a control device without a medium particle filter according to an embodiment of the present invention.
  • control unit 74"" of the control device 4" has an intake valve control part 743"", a heating control part 742"" and a drive control part 745"" that have different control functions from those in the first embodiment. . specifically:
  • the intake valve control part 743"" controls the intake valve to increase the opening degree
  • the drive control part 745"" controls the blower 13 in the air flow drive unit 6 to increase the driving force
  • the heating control unit 742" controls the heating unit to reduce the power, so that the current processing temperature decreases faster.
  • the intake valve control part 743"" controls the intake valve to reduce the opening degree
  • the drive control part 745"" controls the blower 13 in the air flow drive unit 6 to weaken the driving force
  • the heating control unit 742" controls the heating unit to increase the power, so that the current processing temperature rises faster.
  • the actual heat treatment curve formed by the current treatment temperature at each moment can strictly conform to the theoretical heat treatment curve through the combined control of the heating unit and the blower.
  • Fig. 13 is a flow chart of cleaning steps of the particulate filter in Embodiment 5 of the present invention.
  • step S8 is different, and the steps S8-5 in the fifth embodiment are as follows:
  • Step S8-5 the intake valve control part 743"" controls the intake valve to increase or decrease the opening degree
  • the heating control part controls the heating unit to increase or decrease the power according to the comparison result
  • the drive control part controls the blower to increase or decrease the power according to the comparison result Or reduce the driving force, and then go to step S5.
  • Embodiment 5 On the basis of having the same functions and effects as those of Embodiment 1, in Embodiment 5, the opening degree of the intake valve, The power of the heating unit and the driving force of the blower make the current processing temperature conform to the theoretical heating processing curve more quickly.
  • the heating phase includes a first heating sub-phase, a steady sub-phase and a second heating sub-phase.
  • the heating stage does not include sub-stages, and is a curve (as shown in FIG. 14 ).
  • the high temperature maintenance stage, the first temperature drop stage and the second temperature drop stage of the predetermined heat treatment curve are the same as those in Embodiment 1, and will not be repeated here.
  • Embodiment 1 On the basis of having the same functions and effects as those of Embodiment 1, Embodiment 2, Embodiment 3, Embodiment 4 and Embodiment 5, in this Modification 1, since the air flow is changed from The initial temperature room temperature continues to rise to the cleaning temperature of 600° C. within the first predetermined time of 15 minutes, and the temperature rise rate of the temperature rise curve gradually decreases. Therefore, compared with Embodiment 1, the temperature of the air flow can reach the cleaning temperature more quickly, further reducing the time spent in the cleaning process.
  • the first auxiliary temperature sensor 41 and the second auxiliary temperature sensor 42 are temperature sensors that can sense particles filtered through Airflow temperature behind the device.
  • an auxiliary temperature sensor arranged in the cleaning chamber 10 or on the air flow output unit 11 can also be used to sense the temperature of the air flow after passing through the particle filter, and then judge the temperature difference
  • the unit 74 directly judges whether the difference between the current processing temperature and the air flow temperature sensed by the auxiliary temperature sensor is smaller than a predetermined temperature threshold.
  • the model input unit 62 is a liquid crystal display provided on the particle filter cleaning device 3 .
  • the model input unit 62 can be a mobile terminal.

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Health & Medical Sciences (AREA)
  • Toxicology (AREA)
  • Processes For Solid Components From Exhaust (AREA)
  • Filtering Of Dispersed Particles In Gases (AREA)

Abstract

Un équipement de nettoyage automatique destiné à un filtre à particules diesel, utilisé pour chauffer et nettoyer le filtre à particules diesel, comprenant : un dispositif de nettoyage de filtre à particules diesel (3) utilisé pour nettoyer le filtre à particules diesel ; et un dispositif de commande (4) utilisé pour commander le fonctionnement du dispositif de nettoyage de filtre à particules diesel (3), le dispositif de nettoyage de filtre à particules diesel (3) comprenant au moins un capteur de température de traitement (40) utilisé pour détecter la température du flux d'air entrant dans une chambre de nettoyage (10) en tant que température de traitement, et le dispositif de commande (4) commande une soupape d'admission d'air (38), une unité de chauffage (8) et une unité d'entraînement de flux d'air (6) sur la base de la température de traitement et d'une courbe de traitement thermique prédéterminée, de telle sorte que la température de traitement se conforme à une courbe de traitement thermique prédéterminée. Le dispositif peut rapidement effectuer un nettoyage, a un bon effet de nettoyage, et ne provoque pas d'endommagement du filtre à particules diesel.
PCT/CN2021/105487 2021-06-19 2021-07-09 Équipement de nettoyage automatique pour filtre à particules diesel WO2022262025A1 (fr)

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CN202110681436.1A CN113356969B (zh) 2021-06-19 2021-06-19 一种颗粒过滤器自动清洗设备

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JPH1161140A (ja) * 1997-08-19 1999-03-05 Nisshin Kogyo Kk 廃棄物炭化処理方法
CN101158306A (zh) * 2006-02-10 2008-04-09 张家口百通环保科技有限公司 内燃机尾气净化方法及装置
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