CN110905630A

CN110905630A - DPF cleaning system and cleaning method

Info

Publication number: CN110905630A
Application number: CN201911153869.9A
Authority: CN
Inventors: 崔建光; 黄圣浩; 黄成�; 胡磬遥
Original assignee: Chuangyi Environmental Technology (nantong) Co Ltd; Happy Environmental Technology As Of Upper Seabird
Current assignee: Chuangyi Environmental Technology (nantong) Co Ltd; Happy Environmental Technology As Of Upper Seabird
Priority date: 2019-11-22
Filing date: 2019-11-22
Publication date: 2020-03-24

Abstract

The invention provides a DPF cleaning system which is characterized by comprising backpressure testing equipment, ash cleaning equipment, baking maintenance equipment and pore passage detection equipment, wherein the backpressure testing equipment is connected with the ash cleaning equipment; the backpressure testing equipment is used for testing the backpressure state of the DPF to judge whether cleaning is needed in the DPF or not; the ash cleaning equipment blows ash and black smoke particles in the DPF out by using high-pressure cluster air flow; the baking maintenance equipment thoroughly oxidizes and removes residues in the DPF pore channel by using high temperature and dries the residues; the pore passage detection equipment detects whether the pore passages of the cleaned DPF are clean or not by utilizing photoelectric scanning. According to the scheme, the DPF workpiece is subjected to shallow layer and deep layer maintenance through back blowing and roasting, and the maintained PDF is detected through back pressure detection and pore channel detection to determine whether the maintenance reaches the standard. The workpiece detection is accurate, the maintenance is convenient and rapid, and the whole process is visual, controllable and reliable.

Description

DPF cleaning system and cleaning method

Technical Field

The invention relates to the technical field of engine tail gas treatment and environmental protection, in particular to a cleaning system of a DPF black smoke purifier and a cleaning method using the same.

Background

DPF is the English abbreviation of Diesel Particulate Filter, and the Chinese name is: the diesel engine exhaust black smoke particle catcher is a device which is installed in a diesel engine exhaust system and reduces black smoke Particle (PM) in exhaust gas by methods such as filtration, and is called DPF for short. The DPF can effectively remove 70% -90% of black smoke particles in tail gas, is one of the most effective and direct methods for removing the black smoke particles of the diesel engine, and is commercialized internationally at present. The DPF is installed on an exhaust gas exhaust pipe of the diesel engine, and black smoke particles are filtered when exhaust gas flows through the DPF; however, as the working time is prolonged, the increase of black smoke particles in the DPF filter element causes the exhaust back pressure of the whole exhaust system to rise, and the dynamic performance and the economical efficiency of the diesel engine are seriously affected. Therefore, the soot particles filtered by the DPF need to be periodically removed, and this process is also called regeneration of the DPF, so that the DPF can be recovered to be used continuously, and the biggest challenge faced by the DPF is also the regeneration problem of the DPF.

The DPF has numerous tiny pores, which are blocked by the filtered black smoke particles as the engine works, and when the blockage is serious, the exhaust of the engine cannot be discharged, so that a device capable of cleaning the black smoke particles of the DPF is needed to dredge the tiny pores in the DPF.

Disclosure of Invention

The invention aims to solve the technical problem of overcoming the problems in the prior art and provides a DPF cleaning system and a DPF cleaning method.

In order to solve the above problems, the technical solution of the present invention is as follows:

a DPF cleaning system comprises backpressure testing equipment, ash cleaning equipment, baking maintenance equipment and pore channel detection equipment;

the backpressure testing equipment is used for testing the backpressure state of the DPF to judge whether the DPF workpiece needs to be subjected to secondary deep cleaning;

the ash cleaning equipment is used for blowing out black smoke particles and ash in the DPF by utilizing high-pressure cluster air flow;

baking maintenance equipment, namely completely oxidizing, decomposing and removing organic residues which are difficult to blow out in DPF pore channels by using high temperature;

and the pore channel detection equipment detects whether the cleaned DPF body and pore channel have defects or are at the angular corners by utilizing photoelectric scanning.

The backpressure detection equipment comprises a sealed box body, wherein a working chamber is arranged in the box body, and is provided with a sealing door capable of being opened and closed; the pressurizing fan, the pressing device and the differential pressure sensor are connected with an industrial personal computer.

The ash cleaning equipment comprises a sealed box body, wherein a working chamber is arranged in the box body, and the working chamber is provided with a sealing door capable of being opened and closed; the air flow blowing nozzle, the rotary platform and the high-pressure exhaust fan are connected with an industrial personal computer.

The baking maintenance equipment comprises a sealed box body, wherein a working chamber is arranged in the box body, and is provided with a sealing door capable of being opened and closed; the roasting furnace, the fan and the waste gas treatment device are connected with an industrial personal computer.

The pore passage detection equipment comprises a sealed box body, wherein a working chamber is arranged in the box body, and the working chamber is provided with a sealing door capable of being opened and closed; the leveling mechanism, the parallel light source and the fixed-focus camera are connected with an industrial personal computer.

Putting the DPF workpiece into ash cleaning equipment, carrying out back blowing on the DPF for multiple times, putting the DPF workpiece into backpressure detection equipment after back blowing, measuring the backpressure of the DPF, and carrying out pore channel detection if the backpressure is within a qualified range; if the back pressure is not in the qualified range, the DPF body and the pore channel need to be placed into baking maintenance equipment for deep maintenance, a back pressure test is continued after baking, next pore channel detection is carried out after the back pressure test is qualified, the pore channel detection finds whether the DPF body and the pore channel are defective or defective, if the DPF body and the pore channel are defective or defective, a customer is informed, and if the DPF body and the pore channel are not defective or defective, the maintenance is finished.

The method has the advantages that the DPF workpiece is subjected to shallow and deep maintenance through back blowing and roasting, and the performance and the body of the maintained DPF are comprehensively judged through back pressure detection and pore passage detection to determine whether the maintenance reaches the standard or not. The workpiece detection is accurate, the maintenance is convenient and rapid, and the whole process is visual, controllable and reliable.

Drawings

The present invention will be described in detail below with reference to the accompanying drawings and specific embodiments.

Fig. 1 is a schematic overall configuration diagram of a DPF backpressure detection device.

Fig. 2 is a schematic diagram of the operation of the DPF backpressure detecting device.

Fig. 3 is a flowchart of the operation of the DPF backpressure detecting device.

FIG. 4 is a schematic diagram of a DPF ash cleaning apparatus.

Fig. 5 is a control schematic diagram of the DPF ash cleaning apparatus.

FIG. 6 is a flow chart of the operation of the DPF ash clean-up apparatus.

FIG. 7 is a schematic structural diagram of a DPF baking and maintaining device.

Fig. 8 is a schematic structural view of the roasting furnace.

Fig. 9 is a schematic structural view of an exhaust gas treatment device.

FIG. 10 is a schematic diagram illustrating the control principle of the DPF baking and maintaining device.

FIG. 11 is a flow chart of the DPF baking and servicing apparatus.

Fig. 12 is a schematic structural diagram of a DPF pore passage detecting apparatus.

Fig. 13 is a schematic view of a leveling mechanism.

FIG. 14 is a control schematic diagram of a DPF pore path detection device.

FIG. 15 is a flow chart of the operation of the DPF pore path detection device.

FIG. 16 is a flow chart of the DPF cleaning system operation described in the present invention.

Detailed Description

In order to make the technical means, the creation characteristics, the achievement purposes and the effects of the invention easy to understand, the invention is further explained below by combining the specific drawings.

Referring to fig. 1, the DPF backpressure detection device includes a sealed box 11, a working chamber 12 is arranged in the box, the working chamber 12 is provided with a sealing door capable of opening and closing, an air outlet 13 for placing the DPF is arranged on the working chamber, a compressing device 14 is arranged above the air outlet, the air outlet is connected with a pressurizing fan 15, and a differential pressure sensor 16 is further arranged in the box; the pressurizing fan 15, the pressing device 14 and the differential pressure sensor 16 are connected with an industrial personal computer, and the industrial personal computer is used for coordinating and controlling the operation of equipment.

Further, a sealing ring 131 is further disposed at the air outlet 13, and the sealing ring 131 is used for sealing between the DPF and the air outlet. The air current of being convenient for does not reveal, all blows to DPF and detects the piece.

Furthermore, the outer contour of the box body 11 is set to be a round angle, so that the appearance is attractive and elegant, and the use is safe and reliable.

Furthermore, the pressing device 14 is connected with a cross arm, the cross arm is connected with an up-and-down sliding device, and the sliding device is arranged on a vertical guide rail and slides up and down according to the requirement during work.

Further, a baffle (not shown) for preventing foreign matters from falling is disposed at the air outlet 13.

Further, the booster fan 15 is provided with a multistage air filter. The air flow blowing to the DPF can be ensured to be dry and clean.

Further, the sealing door is provided with a transparent window. The transparent window is convenient for observing the working condition so as to take corresponding measures.

Further, the industrial personal computer is provided with a touch screen 17, and the touch screen 17 is arranged on the side face of the box body. All functions of the device can be manipulated using a touch screen.

The bottom of the box body is provided with an anti-skid base. In the working process of the equipment, the box body is ensured to be stable, firm and unmovable.

Referring to fig. 2, the backpressure detection device is controlled according to the principle that a pressurizing fan supplies air to an air inlet cavity through an air pipe, the air blows to a workpiece to be detected, and in the working process, a PLC industrial personal computer measures data according to a pressure sensor and adjusts air inlet quantity according to the data. The PLC industrial personal computer can control the action of the pressing mechanism at the same time, and the pressing mechanism is pressed before the work is started, so that the workpiece to be detected and the sealing ring are pressed tightly and sealed without air leakage. And the PLC industrial personal computer correspondingly displays corresponding working data information on the touch screen.

Referring to fig. 3, the back pressure detection operation is as follows:

starting the test; starting up the equipment; selecting a proper sealing ring according to the size of a workpiece to be detected, and placing the sealing ring into the air inlet cavity; placing a workpiece to be measured on the sealing ring; the PLC touch screen is clicked to start testing; the pressing mechanism presses downwards to press the workpiece to be measured; the pressurizing fan is started to send air with rated flow into the air inlet cavity; the pressure sensor measures back pressure data and transmits the back pressure data into the PLC industrial personal computer; stopping the pressurizing fan; the pressing mechanism ascends; calculating the backpressure data through a program to obtain a result, and judging whether the backpressure data of the workpiece is qualified or not; printing a test result; taking out the workpiece; and (5) finishing the test.

Referring to fig. 4, the DPF ash cleaning device comprises a sealed box 21, a working chamber is arranged in the box, the working chamber is provided with a sealing door capable of opening and closing, a high-pressure airflow blowing nozzle 22 is arranged in the working chamber, a DPF placing platform 23 is arranged at the bottom of the working chamber, a rotation rolling shaft 24 is arranged on the platform, the platform is a rotary platform, and a high-pressure exhaust fan 25 is further arranged in the box and connected with a dust collecting device 26; the air flow blowing nozzle, the rotary platform and the high-pressure exhaust fan are connected with an industrial personal computer.

The high-pressure air flow blowing nozzle is connected with a high-pressure air pump. High-pressure airflow blowing nozzle, blowing pressure of 0.7-0.8 MPa, blowing nozzle aperture: 8-10 mm.

The blowing nozzle moves up and down and stretches back and forth through the blowing nozzle sliding table.

The rotation roller shaft drives a workpiece placed above the rotation roller shaft to rotate clockwise through a motor, the rotation roller shaft is matched with the up-and-down movement of the blowing nozzle, the cleaning of the whole end face is realized, the rotation platform realizes 180-degree rotation of the workpiece inlet and the workpiece outlet through a rotating device, and the rotation roller shaft is used for positive and negative bidirectional purging of the blowing nozzle.

The sealing door is provided with a transparent window.

The industrial personal computer is provided with a touch screen 27, and the touch screen is arranged on the side face of the box body.

The bottom of the box is provided with a non-slip base 28.

Referring to fig. 5, the DPF ash cleaning apparatus control principle is as follows: the PLC industrial personal computer controls the workpiece attitude, and the workpiece attitude is controlled by the self-transmission roller and the rotary platform together, so that the workpiece attitude reaches the optimal attitude. The PLC industrial computer controls the blowing nozzle, and the specific blowing nozzle is arranged on the blowing nozzle sliding table, and the PLC industrial computer controls the blowing nozzle sliding table to move up and down and stretch back and forth, so that the blowing nozzle reaches a matched cleaning path. In the process of processing the workpiece, dust is generated and collected by a dust collecting device which is controlled by a PLC industrial control machine.

Referring to fig. 6, the working process of the DPF ash cleaning device is as follows, after the device is started, a workpiece is placed on the self-transmission roller, the touch screen is clicked to start, the distance sensor automatically measures the distance and confirms the size of the workpiece, the PLC industrial personal computer calculates the cleaning path of the blowing nozzle, the device automatically starts cleaning, and the dust collecting device synchronously starts dust collecting. And after cleaning, taking out the workpiece, and finishing the work.

Referring to fig. 7, the DPF baking maintenance device includes a sealed box 31, a working chamber with a sealing door capable of opening and closing is arranged in the box, a baking furnace 32 for deeply cleaning organic particulate matters in the DPF is arranged in the working chamber, and a fan 34 and a waste gas treatment device 33 are further arranged in the box; the roasting furnace, the fan and the waste gas treatment device are connected with an industrial personal computer.

Referring to fig. 8, the roasting furnace includes a furnace body 321 for heating, a furnace cover 322 is disposed on the upper portion of the furnace body, the furnace cover is of an overturning structure, an expansion rod 323 for opening and closing the furnace cover is disposed on the side of the furnace cover, and an air inlet 324 is disposed at the bottom of the furnace body. The air inlet is connected with a fan.

The telescopic link is electric telescopic link.

The bottom of the roasting furnace is also provided with a travelling wheel 325. The roasting furnace can be conveniently placed in or pulled out of the box body.

The heating mode of the roasting furnace is 380V AC power supply heating. And (4) controlling through a PLC program.

An air inlet at the bottom of the roasting furnace can control the air flow in the furnace, and the opening angle and the temperature in the furnace can be controlled automatically by the furnace cover.

Referring to fig. 9, the exhaust gas treatment device includes a cylinder 331, an air inlet 332 is disposed at a lower portion of the cylinder, an air outlet 333 is disposed at an upper portion of the cylinder, a spray device 334 is disposed in the cylinder, and a water tank 335 is disposed at a lower portion of the cylinder.

A circulating water pump 336 connected with the spraying device is arranged in the water tank.

Exhaust gas purification apparatus 337 exhaust gas treatment apparatus use: treating VOC organic compounds and peculiar smell generated after the workpiece is roasted, and performing harmless treatment through a waste gas purification device; and then the waste gas is treated by a waste gas treatment cooling device, the temperature of the waste gas is reduced by spraying water mist, and the waste gas is cooled and then discharged.

The industrial personal computer is provided with a touch screen, and the touch screen is arranged on the side face of the box body.

The bottom of the box body is provided with an anti-skid base.

Referring to fig. 10, the DPF baking maintenance equipment control principle is as follows: after the workpiece is placed in the roasting furnace, roasting is carried out, the PLC controls the roasting process by controlling the air output of the roasting furnace and the opening and closing size of the furnace cover, and the roasted gas is subjected to harmless treatment and the temperature of the waste gas is reduced by the waste gas generated in the roasting process through the waste gas purification device and the waste gas treatment cooling device.

Referring to fig. 11, the DPF baking maintenance device works as follows: after starting up, putting the workpiece into a roasting furnace, starting clicking a touch screen interface, automatically starting the equipment, starting the roasting furnace to work, and synchronously displaying a progress bar by the touch screen; and finishing the progress bar, synchronously finishing the work of the machine in the box body, prompting the maintenance to finish by the screen, opening the equipment door, taking out the workpiece, and finishing the work flow.

Referring to fig. 12, the DPF pore passage detection apparatus includes a sealed box 41, a working chamber is arranged in the box, the working chamber is provided with a sealing door capable of opening and closing, a bearing platform 42 for placing the DPF is arranged in the working chamber, a leveling mechanism 43 is arranged on the bearing platform, a flat light source 44 is arranged below the leveling mechanism, and a fixed focus camera 45 is arranged above the bearing platform; the leveling mechanism 43, the flat light source 44 and the fixed-focus camera 45 are connected with an industrial personal computer.

Referring to fig. 13, the leveling mechanism 43 includes: a front and back leveling mechanism and a left and right leveling mechanism for controlling the front and back and left and right angles of the leveling platform, and a front and back movement mechanism for controlling the front and back displacement of the whole leveling platform. Further, the method comprises the following steps: the front and rear leveling mechanism includes a front and rear leveling motor 431, which drives a rotating shaft to adjust the front and rear pitch angle. The left and right leveling mechanism comprises a left and right leveling motor 432, which drives a rotating shaft to adjust the left and right pitching angles. The back-and-forth movement mechanism comprises a back-and-forth movement motor 433, the motor drives a rotating shaft to rotate, and the rotating shaft drives the screw rod nut mechanism to adjust back-and-forth movement.

Parallel light source 44, the bottom sets up LED dot matrix lamp and drive power supply, and the middle part sets up the parallel light source membrane of light, and the top sets up high strength glass.

The fixed-focus camera 45 has a lens field size of 50x50 mm; detection range: 500x500 mm.

The fixed-focus camera is arranged on a sliding table, and the lens moves forwards, backwards, leftwards and rightwards through the top sliding table.

The sealing door is provided with a transparent window.

The industrial personal computer is provided with a touch screen 46 which is arranged on the side face of the box body.

The bottom of the box body is provided with an anti-skid base 47.

Referring to fig. 14, the DPF orifice monitoring apparatus is controlled according to the following principle: the workpiece is placed on the bearing platform, and the PLC industrial personal computer controls the leveling mechanism to level the workpiece. The PLC industrial control machine controls the flat light source to switch to act and emit parallel light, and the PLC industrial control machine controls the movable sliding table to enable the fixed-focus camera to be located at a working position.

Referring to fig. 15, the DPF orifice monitoring apparatus operates as follows: the device is started, a workpiece is placed on a bearing platform above the leveling mechanism, the touch screen is clicked to start, the PLC industrial personal computer controls the leveling mechanism to automatically level, the flat light source is electrified to emit light, the lens of the fixed-focus camera starts to scan the whole working surface, the scanned picture is automatically generated by the computer, whether the picture is qualified or not is judged through software, and therefore whether the workpiece is defective or not is obtained, a detection result is issued, and the work is finished.

Referring to fig. 16, the overall process flow using the system is as follows:

after the DPF workpiece is detached, firstly putting the DPF workpiece into ash cleaning equipment, carrying out back blowing on the DPF multiple times, then putting the DPF workpiece into backpressure detection equipment, measuring the backpressure of the DPF, and carrying out pore channel detection if the backpressure is within a qualified range; if the back pressure is not in the qualified range, the DPF body and the pore channel need to be placed into baking maintenance equipment for deep maintenance, a back pressure test is continued after baking, next pore channel detection is carried out after the back pressure test is qualified, the pore channel detection finds whether the DPF body and the pore channel are defective or defective, if the DPF body and the pore channel are defective or defective, a customer is informed, and if the DPF body and the pore channel are not defective or defective, the maintenance is finished.

The foregoing shows and describes the general principles, essential features, and advantages of the invention. It will be understood by those skilled in the art that the present invention is not limited to the embodiments described above, which are given by way of illustration of the principles of the present invention, and that various changes and modifications may be made without departing from the spirit and scope of the invention as defined by the appended claims. The scope of the invention patent claims is defined by the appended claims and their equivalents.

Claims

1. A DPF cleaning system is characterized by comprising backpressure testing equipment, ash cleaning equipment, baking maintenance equipment and pore passage detection equipment;

the backpressure testing equipment is used for testing the backpressure state of the DPF to judge whether cleaning is needed in the DPF or not;

the ash cleaning equipment blows ash and black smoke particles in the DPF out by using high-pressure cluster air flow;

the baking maintenance equipment thoroughly oxidizes and removes residues in the DPF pore channel by using high temperature and dries the residues;

the pore passage detection equipment detects whether the pore passages of the cleaned DPF are clean or not by utilizing photoelectric scanning.

2. The DPF cleaning system as claimed in claim 1, wherein the backpressure detecting device comprises a sealed box body, a working chamber is arranged in the box body, the working chamber is provided with a sealing door capable of being opened and closed, the DPF cleaning system is characterized in that an air outlet for placing the DPF is arranged on the working chamber, a compressing device is arranged above the air outlet, the air outlet is connected with a pressurizing fan, and a differential pressure sensor is further arranged in the box body; the pressurizing fan, the pressing device and the differential pressure sensor are connected with an industrial personal computer.

3. The DPF cleaning system as claimed in claim 1, wherein the ash cleaning device comprises a sealed box body, a working chamber is arranged in the box body, the working chamber is provided with a sealing door which can be opened and closed, the DPF cleaning system is characterized in that a high-pressure airflow blowing nozzle is arranged in the working chamber, a DPF placing platform is arranged at the bottom of the working chamber, a self-rotating roller is arranged on the platform, the platform is a rotary platform, a high-pressure exhaust fan is arranged in the box body, and the high-pressure exhaust fan is connected with a dust collecting device; the air flow blowing nozzle, the rotary platform and the high-pressure exhaust fan are connected with an industrial personal computer.

4. The DPF cleaning system of claim 1, wherein the baking maintenance equipment comprises a sealed box body, a working chamber is arranged in the box body, the working chamber is provided with a sealing door which can be opened and closed, the baking furnace for further cleaning particulate matters in the DPF is arranged in the working chamber, and an air cooling device and an exhaust gas treatment device are further arranged in the box body; the roasting furnace, the air cooling device and the waste gas treatment device are connected with an industrial personal computer.

5. The DPF cleaning system as claimed in claim 1, wherein the pore passage detection device comprises a sealed box body, a working chamber is arranged in the box body, the working chamber is provided with a sealing door which can be opened and closed, and the DPF cleaning system is characterized in that a bearing platform for placing the DPF is arranged in the working chamber, a leveling mechanism is arranged on the bearing platform, a flat light source is arranged below the leveling mechanism, and a fixed-focus camera is arranged above the bearing platform; the leveling mechanism, the flat light source and the fixed-focus camera are connected with an industrial personal computer.

6. A DPF cleaning method is characterized by comprising the following steps:

putting the DPF workpiece into ash cleaning equipment, carrying out back blowing on the DPF, putting the DPF workpiece into backpressure detection equipment after the back blowing, measuring the backpressure of the DPF, and carrying out pore channel detection if the backpressure is within a qualified range; if the back pressure is not in the qualified range, the PDF porous pipe needs to be placed into baking maintenance equipment for deep maintenance, a back pressure test is continuously tested after baking, next porous pipe detection is carried out after the back pressure test is qualified, the porous pipe detection searches whether the PDF porous pipe has defects or not, if the defects are found, a client is informed, and if the defects do not exist, the maintenance is finished.