DPF system based on particle collecting device and control method of DPF system

Abstract

The invention provides a DPF system based on a particle collecting device and a control method thereof.The DPF system comprises the particle collecting device, the particle collecting device comprises an aggregation filter AF (103) and a cyclone particle collector CPC (100), the aggregation filter AF (103) arranged on the downstream of an exhaust pipe (101) filters particles in tail gas flowing through the exhaust pipe (101), and the cyclone particle collector CPC (100) filters the particles in the tail gas flowing through the exhaust pipe (101); the particulate matters remained in the aggregation filter AF (103) are aggregated into larger particles and then are discharged from the aggregation filter AF (103); and a cyclone particle collector (CPC) (100) is arranged at the downstream of the aggregation filter AF (103) and is used for capturing and treating particles discharged from the aggregation filter AF (103). The control method is used for controlling the DPF system.

Description

Technical Field

[0001] The invention relates to a DPF system and a control method thereof, in particular to a DPF system based on a particle collecting device and a control method thereof. Background Art

[0002] This section merely provides background information related to the present disclosure and is not necessarily prior art.

[0003] Soot particles (commonly referred to as diesel particulate matter or PM) produced by diesel engines have some specific physical and chemical properties that have important impacts on the environment and human health. Diesel exhaust particulate matter is mainly composed of extremely fine carbon core particles, usually less than 2.5 microns (PM2.5) (ash particles are mostly in the range of 1-10 microns, and soot particles are mostly in the range of 0.1-1 microns in diameter), and can adsorb organic compounds (such as polycyclic aromatic hydrocarbons PAHs), sulfides, nitrides, and metal elements on the surface. Due to its complex chemical composition, diesel particulate matter has high chemical and biological reactivity in the environment and can trigger various chemical reactions, including photochemical reactions. The organic compounds and metal elements adsorbed by it make diesel particulate matter potentially toxic and can have serious effects on human health. For example, these fine particles can penetrate deep into the lungs and even enter the blood circulation, causing respiratory and cardiovascular diseases. At the same time, diesel particulate matter is usually not a perfect sphere, but has an irregular and porous structure, which allows them to adsorb and carry more harmful chemicals. And because of their small size and complex shape, diesel PM have a high surface area to volume ratio, which increases their potential for interaction with other materials in the environment.

[0004] Diesel particulate matter is an important source of air pollution in cities and industrial areas, and has a significant impact on air quality and visibility. Due to its chemical stability and bioaccumulation, diesel particulate matter degrades slowly in the environment and can exist in the environment for a long time. Therefore, controlling and reducing particulate matter emitted by diesel engines is an important measure to improve air quality and protect public health. In order to remove soot particles in engine exhaust, diesel particulate filter (DPF) technology is generally used.

[0005] Diesel particulate filter (DPF) technology is a key environmental technology used to reduce diesel engine emissions. DPF is usually made of ceramic material, and its structure allows exhaust gas to pass through while intercepting particulate matter. After the filter has been working for a period of time, particulate matter will accumulate in the filter and need to be cleaned or regenerated. The regeneration process of DPF is usually achieved in two ways: active regeneration and passive regeneration. In active regeneration, the system actively increases the exhaust temperature through additional fuel injection or electric heating elements to burn particulate matter accumulated in the filter. Passive regeneration relies on the high temperature of the exhaust gas to naturally burn particulate matter during normal engine operation. The maintenance and management of the DPF system requires a sophisticated control strategy to ensure the efficiency of the engine and the long-term effectiveness of the filtration system.

[0006] However, the DPF system increases manufacturing costs, including high-quality materials and complex control systems, and also increases the purchase and maintenance costs of the vehicle. At the same time, the DPF requires regular cleaning and maintenance to prevent particulate matter from clogging the filter. If the regeneration process is unsuccessful, manual intervention is required, which increases operating costs. In some cases, the DPF may limit the engine's output power, especially when the filter begins to clog, which will affect the performance of the vehicle. In order to achieve DPF regeneration, additional fuel injection is required to increase the exhaust temperature, which in turn increases fuel consumption. Therefore, in the diesel engine system, the size, back pressure, materials, catalyst coating, matching system, layout, etc. of the DPF need to be weighed and compromised to achieve the overall cost optimization.

[0007] In addition to the wall-flow filter such as DPF, the cyclone particulate collector (CPC) is also a commonly used particulate filter device. Its working principle is based on centrifugal separation technology. When the dust-laden gas enters the collector, it rotates along a spiral path. Due to the centrifugal force, the heavier particles are thrown to the outer wall of the collector and then settle into the dust hopper at the bottom, while the lighter gas is discharged from the top outlet. The simple design and low maintenance cost of the cyclone collector make it very popular in many industries, especially for handling large amounts of hot or humid gases. The efficiency of the cyclone collector is affected by many factors, including the size and density of the particles, as well as the flow rate and viscosity of the gas. In general, the cyclone collector can provide higher separation efficiency for larger and heavier particles. However, for those extremely fine particles, the efficiency will drop significantly, so it is usually not used to capture tiny particles such as smoke. In diesel engine systems, electrostatic devices can be used to improve the efficiency of soot capture, but the device is greatly affected by the moisture in the exhaust gas and has poor performance.

[0008] It should be noted that the information disclosed in the above background technology section is only used to enhance the understanding of the background of the present disclosure, and therefore may include information that does not constitute the prior art known to ordinary technicians in the field. Summary of the invention

[0009] Purpose of the invention: The technical problem to be solved by the present invention is to provide a DPF system based on a particle collection device and a control method thereof in view of the deficiencies in the prior art.

[0010] In order to solve the above technical problems, the present invention discloses a DPF system based on a particle collection device and a control method thereof, wherein the DPF system includes a particle collection device, wherein:

[0011] The particle collection device comprises: an agglomeration filter AF and a cyclone particle collector CPC, wherein:

[0012] The agglomeration filter AF disposed downstream of the exhaust pipe filters particulate matter in the exhaust gas flowing through the exhaust pipe, and the particulate matter retained in the agglomeration filter AF is aggregated into larger particles and then discharged therefrom;

[0013] A cyclonic particle collector CPC is provided downstream of the agglomeration filter AF for capturing and processing particulate matter discharged from the agglomeration filter AF.

[0014] Furthermore, the particle collection device further includes:

[0015] A controller electrically connected to the cyclonic particle collector CPC.

[0016] Furthermore, the aggregation filter AF specifically includes:

[0017] An inner core is arranged in parallel in the hollow cylindrical shell; the inner core is composed of a metal fiber board and a corrugated metal foil;

[0018] Wherein, the metal fiber plate and the corrugated metal foil are arranged in parallel with each other.

[0019] Furthermore, the metal fiber plate has gaps for filtering the particulate matter.

[0020] Furthermore, the corrugated metal foil is a corrugated structure, which divides the passing airflow into two airflow parts, the first airflow part flows parallel to the metal fiber plate, and the second airflow part passes through the metal fiber plate upward along the corrugated structure.

[0021] Furthermore, the cyclone particle collector CPC comprises:

[0022] A hollow inverted cone-shaped cyclone cylinder, wherein the upper side of the cyclone cylinder is provided with a connecting pipeline connected to the upstream fluid; and the bottom of the cyclone cylinder is provided with a particle collection bucket for collecting particulate matter;

[0023] An air outlet pipe is arranged on the top of the cyclone cylinder, the lower end of the air outlet pipe is vertically inserted into the cyclone cylinder, and the upper end is fluidically connected to the downstream exhaust gas treatment device.

[0024] Furthermore, a heating sensor unit is provided at the bottom of the particle collection barrel, and the heating sensor unit includes:

[0025] A particle quantity sensor and a heating device are used to detect the content of particulate matter in the particle collection barrel, and the particle quantity sensor and the heating device are electrically connected to the controller respectively.

[0026] Furthermore, the DPF system comprises:

[0027] The particle collecting device is connected to the upstream exhaust fluid, and the downstream of the particle collecting device is connected to the inlet end of the diesel particulate trap DPF fluid through a connecting pipeline.

[0028] Furthermore, the DPF system further includes:

[0029] The controller is electrically connected to an upstream exhaust temperature sensor disposed upstream of the DPF system;

[0030] The controller is also electrically connected to a downstream exhaust temperature sensor disposed downstream of the DPF system;

[0031] The controller is also electrically connected to the pressure difference and pressure sensors arranged at both ends of the diesel particulate trap DPF.

[0032] The present invention also proposes a control method for a DPF system based on a particle collection device, which is implemented using the above system and includes the following steps:

[0033] Step 1, the particle amount sensor collects the particle content in the particle collection bucket and sends it to the controller;

[0034] Step 2, the controller determines the relationship between the particulate matter content and the first threshold, the second threshold and the third threshold. If the particulate matter content is greater than the first threshold, the process proceeds to step 3; if the particulate matter content is greater than the second threshold, the process proceeds to step 4; if the particulate matter content is greater than the third threshold, the process proceeds to step 5;

[0035] Step 3, the controller prompts the user to clean the particle collection bucket;

[0036] Step 4, the controller sends a regeneration signal to initiate a regeneration process of the diesel particulate filter DPF;

[0037] Step 5: the controller starts the electric heating device to clean the particle collection barrel.

[0038] Beneficial effects:

[0039] 1. The system proposed by the present invention can reduce the size and back pressure of DPF, while reducing the regeneration energy consumption and the cleaning service of DPF, thereby reducing the overall cost of the system.

[0040] 2. In the technical solution proposed by the present invention, since the DPF only collects small particles and mainly regenerates passively, the DPF regeneration time interval can be extended a lot, thereby saving fuel consumption. BRIEF DESCRIPTION OF THE DRAWINGS

[0041] The present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments, and the above and / or other advantages of the present invention will become more clear.

[0042] Figure 1 It is a schematic diagram of the overall structure of the present invention.

[0043] Figure 2 FIG. 1 is a schematic diagram of the structure of a cyclone particle collector CPC in an embodiment.

[0044] Figure 3 It is a schematic diagram of the structure of the aggregation filter AF in an embodiment.

[0045] Figure 4 It is a schematic diagram of the structure of the inner core in an embodiment.

[0046] Figure 5 It is a schematic diagram of the effect curve of the agglomeration filter AF and the cyclone particle collector CPC on particulate matter.

[0047] Figure 6 It is a schematic diagram of the structure of a heating sensor unit in an embodiment.

[0048] Figure 7 It is a schematic diagram of the structure of a heating unit in an embodiment.

[0049] Figure 8 FIG. 1 is a top view of an upper base in one embodiment.

[0050] Fig. 9 It is a schematic diagram of the structure of a brake kinetic energy recovery device in an embodiment. DETAILED DESCRIPTION

[0051] In order to reduce the size and back pressure of DPF, reduce the regeneration energy consumption and reduce the cleaning service of DPF, thereby reducing the overall cost of the system, the present invention proposes a device that combines CPC with DPF. The device uses an aggregation filter (AF, Aggregation Filter) to first filter small soot and ash particles, and aggregate them into large-sized particles in the filter. Then, due to the increase in pressure resistance, these large particles will be blown out, causing particle leakage (Blow-Off). The particles leaked from the AF are captured by the CPC and eventually cleaned through maintenance or removed by heating and oxidation. At the same time, the tiny particles leaked from the AF and CPC are eventually captured by the DPF. The overall device has the same particle removal efficiency as the DPF.

[0052] The present invention proposes a DPF system based on a particle collection device, the structure of which is as follows: Figure 1 As shown, the exhaust pipe 101 of automobile exhaust gas is connected to the air inlet end of the agglomeration filter AF 103. An exhaust temperature sensor 178 is installed on the exhaust pipe 101, which is electrically connected to the controller 140 through a signal line 188. The outlet end of the agglomeration filter AF 103 is connected to the air inlet end of the cyclone particle collector CPC 100 through a connecting line 102, and the outlet end of the cyclone particle collector CPC 100 is connected to the inlet end cone of the diesel particulate trap DPF 110 through a connecting line 111. A heating sensor unit is installed at the bottom of the CPC 100, and the carbon load sensor and the heater therein are connected to the controller 140 through signal lines 189 and 176 respectively. An exhaust temperature sensor 117 is installed on the outlet end cone of the DPF 110, and the exhaust temperature sensor is electrically connected to the controller 140 through a signal line 177. At both ends of the DPF, there are air pipes connected to the pressure difference and pressure sensor 125, and the sensor is connected to the controller 140 through a signal line 187.

[0053] In one embodiment of CPC 100, the specific structure is as follows Figure 2 As shown. In the figure, CPC 100 includes an inverted conical cyclone barrel 105, a particle collection barrel 115 and a heating sensor unit 116. The particle collection barrel 115 is located at the lower end of the inverted conical cyclone barrel 105, and the heating sensor unit is located at the bottom of the particle collection barrel 115. The heating sensor unit 116 includes a particle amount sensor and a heating device. The particle amount sensor is electrically connected to the controller 140 through a signal line 189, and the heating device is electrically connected to the controller 140 through a signal line 182. The function of the particle amount sensor is to detect the amount of particulate matter in the CPC, and the function of the heating device is to remove the combustible particulate matter (such as carbon smoke) therein by heating the particulate matter. An outlet pipe 104 is arranged at the upper end of the cyclone barrel 105, and the exhaust gas that has filtered out some particulate matter flows out through the outlet pipe.

[0054] In one embodiment, the agglomeration filter AF 103 may be used as follows Figure 3 The structure shown. Figure 3 As shown, AF 103 has inner cores 200 arranged in parallel, such as Figure 4 As shown in FIG. 1 , the inner core 200 is composed of a calcined porous metal fiber sheet 201 and a corrugated metal foil 202. In the AF 103, the airflow flows in the direction of the arrow, and when the airflow flows through the metal fiber sheet 201, the soot and ash therein are filtered out by the metal fibers. The soot and ash trapped in the metal fibers will gather into larger particles, and when the airflow resistance caused by them is too large, they will be blown away by the airflow (Blow-off, particle leakage), and these blown away large particles will be collected in the CPC 100 when passing through it.

[0055] A typical curve of the effect of AF and CPC on particulate matter is as follows: Figure 5 As shown in the figure, curve 191 is the mass distribution of particles upstream of AF and CPC, 192 is the mass distribution of particles downstream, and curves 193 and 190 are the variation curves of particle removal efficiency of AF and CPC with particle size. It can be seen from curve 191 that the particle removal efficiency of CPC is related to the particle size. The larger the particle size, the higher the removal efficiency. Curve 193 shows that AF has a relatively high removal efficiency for both small and large particles, but a relatively low removal efficiency for particles around 50 nanometers.

[0056] exist Figure 1 In the system shown, AF 103 only leaks particles when the airflow rate is high and the back pressure is high. Moreover, the diameter of the particles released during the particle leakage is above 1 micron. At this time, the filtration efficiency of CPC 100 can exceed 90% (e.g. Figure 5 As shown in the figure, AF 103 cooperates with CPC 100 to aggregate small particles into large particles, and can obtain a comprehensive particle removal efficiency of more than 80%. In addition, AF 103 can also be coated with an oxidation catalyst, such as an oxidation catalyst containing precious metals platinum and palladium. Under the action of the oxidation catalyst, liquid soluble particles (SOF) in carbon smoke can be oxidized and converted into water and carbon dioxide, thereby reducing the amount of carbon smoke deposition.

[0057] AF 103 cannot filter out all particulate matter. The tiny particles that are not filtered out are collected by the downstream DPF 110 after passing through AF 103 and CPC 100 with the exhaust gas flow. Since DPF 110 only collects some tiny particles in the exhaust gas, its volume can be greatly reduced, reducing back pressure and energy consumed by regeneration. Since DPF only collects small particles and mainly regenerates passively, the DPF regeneration time interval can be extended a lot (some applications can be done without active regeneration), thereby saving fuel consumption. At the same time, the use of remote post-injection for DPF regeneration will cause oil dilution. Increasing the regeneration time interval will solve this problem because it will allow the fuel in the diluted oil enough time to evaporate.

[0058] In addition to the removal of part of the SOF in the DOC 120 and the AF 103, a large portion of the soot and ash particles will fall into the particle collection bucket 115. There are three ways to remove this part of the particles:

[0059] Removal method 1: During system maintenance, the particle collection barrel 115 is removed and the particles therein are processed;

[0060] Removal method 2: When the DPF is regenerated, high-temperature combustion gas is used to oxidize the soot in the particle collection barrel to produce water and carbon dioxide;

[0061] Removal method three: using the heating sensor unit 116 to electrically heat the particulate matter in the particle collection barrel 115 to oxidize the soot particles therein.

[0062] Among the above three removal methods, the first removal method is necessary because it is necessary to remove ash particulate matter that cannot be eliminated by high-temperature oxidation. Removal method 2 can be carried out simultaneously during DPF regeneration, so if a special CPC regeneration mode is not added, no special treatment is required. If the system only uses removal methods 1 and 2, the particle collection barrel 115 can adopt a simple structure without the need for a heating sensor unit 116. At this time, it is only necessary to clean the particulate matter in the particle collection barrel regularly. In some applications, the exhaust gas temperature is high and the nitrogen oxide concentration is also high. This application can consider no (active) regeneration, that is, only passive regeneration can be used to remove small particles of carbon soot in the DPF. In this application, only removal methods 1 and 3 are used.

[0063] In the third removal method, the heating sensor unit 116 includes two parts, a heater and a sensor unit. The heater is used to heat up by electric heating to remove the soot in the particle collection barrel by oxidation, while the sensor unit is used to detect the amount of soot and ash deposited in the particle collection barrel 115.

[0064] An example of an embodiment of a heating sensor unit is Figure 6In this embodiment, the heating sensor unit includes a housing 410, a lower base 430, an upper base 431, bolts 411, a heating unit 420, a heat-conducting column 418, a particle amount detection electrode 1 415 and a particle amount detection electrode 2 416. Figure 6 As shown, in the heating sensor unit, the lower base 430 and the upper base 431 are fastened to the outer shell 410 with bolts 411; corresponding grooves are provided on the upper surface of the lower base 430 and the lower surface of the upper base 431 and can enclose a closed space, and a heating unit 420 is arranged in the closed space between the lower base 430 and the upper base 431.

[0065] like Figure 7 As shown, the heating unit 420 is composed of a heat conductor 441 and an electric heating body 442. The electric heating body 442 has an electrode 1 426 and an electrode 2 427. The electrode 1 426 and the electrode 2 427 are provided with an outer insulator 425 and an insulator 2 428 to insulate them from the upper and lower bases 431 and 430. At the same time, the electrode 1 426 and the electrode 2 427 are electrically connected to the controller 140 through a signal line 182. A heat-conducting column 418 is provided on the upper base 431. A catalyst coating can be applied on the outer surface of the upper base 431 and the heat-conducting column 418 to assist in oxidizing carbon smoke. In the middle of the upper base 431 and the lower base 430, a particle amount detection electrode 1 415 and a particle amount detection electrode 2 416 are inserted. The bottom of the particle amount detection electrode 1 415 is provided with an outer insulator 3 421 to insulate it from the upper and lower bases 431 and 430, while the electrode part is in contact with the particles; the bottom of the particle amount detection electrode 2 416 is provided with an outer insulator 4 423. The particle amount detection electrode 1 415 and the particle amount detection electrode 2 416 are connected to the controller 140 through the signal line 182. The top view of the upper base 431 is shown in FIG. Figure 8 shown.

[0066] exist Figure 6 In the structure shown, the particulate matter accumulated between the particle amount detection electrode 1 415 and the particle amount detection electrode 2 416 will cause the impedance between the two electrodes to change. By detecting the impedance change, the amount of particulate matter accumulation can be detected. When the controller 140 detects that the amount of particulate matter exceeds a limit value, a DPF regeneration signal can be generated, and the signal triggers the DPF regeneration process through the ECU (not shown). When the amount of particulate matter further exceeds a limit value, the controller 140 can trigger a maintenance signal to prompt and require the user to maintain the CPC 100.

[0067] During maintenance of CPC 100, the engine is first shut down, and then after cooling, the particle collection barrel 213 is removed from the cyclone barrel 212 and the collected material is cleaned. After cleaning, a cleaning fluid containing a weak acid solution may be used for further cleaning to remove the ash therein.

[0068] The particulate matter signal can also be further used to control the electric heating unit 420 to heat the heating sensor unit 116, thereby oxidizing and removing the soot therein. A simple heating logic can be set as follows: when the controller 140 detects that the amount of particulate matter exceeds a limit, the electric heating is turned on through the signal line 182. Since the electric heating only heats the soot instead of the exhaust gas, the fuel consumption of regeneration can be greatly saved. During heating, the catalyst coating on the outer surface of the upper base 431 and the heat-conducting column 418 can reduce the oxidation reaction temperature of the soot, so that the oxidation reaction is carried out at a lower temperature, thereby saving heating energy.

[0069] exist Figure 6 The electrical heating energy of the heating sensor unit shown can also be provided by brake recovery energy. Fig. 9 As shown, in one example, the brake kinetic energy recovery device includes a transmission control device 152 and a motor generator 155 (Motor Generator) installed on an axle 153. The axle 153 is connected to the wheel 154, and the motor generator 155 is electrically connected to the controller 140 through a signal line 151. When the vehicle brakes, the motor generator 155 enters a generator state and is driven by the axle 153. The electricity generated by the motor generator 155 is applied to the heating sensor unit via the signal line 151, the controller 140, and the signal line 176 for heating the heating sensor unit. Brake heating is a recovery of energy and does not increase fuel consumption.

[0070] In a specific implementation, the present application provides a computer storage medium and a corresponding data processing unit, wherein the computer storage medium can store a computer program, and when the computer program is executed by the data processing unit, the invention content of a DPF system based on a particle collection device provided by the present invention and some or all of the steps in each embodiment can be executed. The storage medium can be a disk, an optical disk, a read-only memory (ROM) or a random access memory (RAM), etc.

[0071] Those skilled in the art can clearly understand that the technical solutions in the embodiments of the present invention can be implemented by means of computer programs and their corresponding general hardware platforms. Based on such an understanding, the technical solutions in the embodiments of the present invention can be essentially or partly contributed to the prior art in the form of computer programs, i.e., software products, which can be stored in a storage medium and include several instructions for enabling a device including a data processing unit (which can be a personal computer, a server, a single-chip microcomputer, an MCU or a network device, etc.) to execute the methods described in various embodiments of the present invention or certain parts of the embodiments.

[0072] The present invention provides a DPF system based on a particle collection device. There are many methods and ways to implement the technical solution. The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principle of the present invention. These improvements and modifications should also be regarded as the protection scope of the present invention. All components not specified in this embodiment can be implemented by existing technologies.

Claims

1. A DPF system based on a particle collection device, characterized in that: The DPF system includes a particle collection device, wherein: The particle collection device comprises: an agglomeration filter AF (103) and a cyclone particle collector CPC (100), wherein: An agglomeration filter AF (103) disposed downstream of the exhaust pipe (101) filters particulate matter in the exhaust gas flowing through the exhaust pipe (101), and the particulate matter retained in the agglomeration filter AF (103) is aggregated into larger particles and then discharged therefrom; A cyclonic particle collector CPC (100) is provided downstream of the agglomeration filter AF (103) for capturing and processing particulate matter discharged from the agglomeration filter AF (103).

2. A DPF system based on a particle collection device according to claim 1, characterized in that: The particle collection device further comprises: A controller (140) is electrically connected to the cyclonic particle collector CPC (100).

3. A DPF system based on a particle collection device according to claim 2, characterized in that: The aggregation filter AF (103) specifically comprises: An inner core (200) is arranged in parallel in the hollow cylindrical shell; the inner core (200) is composed of a metal fiber board (201) and a corrugated metal foil (202); Wherein, the metal fiber plate (201) and the corrugated metal foil (202) are arranged in parallel with each other.

4. A DPF system based on a particle collection device according to claim 3, characterized in that: The metal fiber plate (201) has gaps for filtering the particulate matter.

5. A DPF system based on a particle collection device according to claim 4, characterized in that: The corrugated metal foil (202) is a corrugated structure, which divides the passing airflow into two airflow parts, the first airflow part flows parallel to the metal fiber plate (201), and the second airflow part flows upward along the corrugated structure through the metal fiber plate (201).

6. A DPF system based on a particle collection device according to claim 5, characterized in that: The cyclone particle collector CPC (100) comprises: A hollow inverted cone-shaped cyclone cylinder (105), wherein the upper side of the cyclone cylinder (105) is provided with a connecting pipeline (102) connected to an upstream fluid; and the bottom of the cyclone cylinder (105) is provided with a particle collection bucket (115) for collecting particulate matter; An air outlet pipe (104) is provided at the top of the cyclone cylinder (105). The lower end of the air outlet pipe (104) is vertically inserted into the cyclone cylinder (105), and the upper end is fluidically connected to a downstream exhaust gas treatment device.

7. A DPF system based on a particle collection device according to claim 6, characterized in that: A heating sensor unit (116) is provided at the bottom of the particle collection barrel (115), and the heating sensor unit (116) comprises: A particle quantity sensor and a heating device are used to detect the particle content in the particle collection barrel (115), and the particle quantity sensor and the heating device are electrically connected to the controller (140) respectively.

8. A DPF system based on a particle collection device according to claim 7, characterized in that: The DPF system further includes: The particle collection device is connected to the upstream exhaust fluid, and the downstream of the particle collection device is connected to the inlet end fluid of the diesel particulate trap DPF (110) through a connecting pipeline (111).

9. A DPF system based on a particle collection device according to claim 8, characterized in that: The DPF system further includes: The controller (140) is electrically connected to an upstream exhaust temperature sensor (178) disposed upstream of the DPF system; The controller (140) is also electrically connected to a downstream exhaust temperature sensor (117) disposed downstream of the DPF system; The controller (140) is also electrically connected to a pressure difference and pressure sensor (125) provided at both ends of the diesel particulate filter DPF (110).

10. A control method for a DPF system based on a particle collection device, implemented by the system of claim 9, characterized in that: The following steps are involved: Step 1, the particle amount sensor collects the particle content in the particle collection bucket (115) and sends it to the controller (140); Step 2, the controller (140) determines the relationship between the particulate matter content and the first threshold, the second threshold and the third threshold, and if the particulate matter content is greater than the first threshold, proceeds to step 3, if the particulate matter content is greater than the second threshold, proceeds to step 4, and if the particulate matter content is greater than the third threshold, proceeds to step 5; Step 3, the controller (140) prompts the user to clean the particle collection bucket (115); Step 4, the controller (140) sends a regeneration signal to initiate a regeneration process of the diesel particulate filter DPF (110); Step 5: the controller (140) starts the electric heating device to clean the particle collection barrel (115).

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