CN111720191B

CN111720191B - DPF cleaning method and cleaning machine thereof

Info

Publication number: CN111720191B
Application number: CN202010664573.XA
Authority: CN
Inventors: 黄育新; 赖乙乐; 冯凯; 彭元发; 郭少武; 李涛
Original assignee: Guangdong Jianan Environmental Biotechnology Co ltd
Current assignee: Guangdong Jianan Environmental Biotechnology Co ltd
Priority date: 2020-07-10
Filing date: 2020-07-10
Publication date: 2023-08-15
Anticipated expiration: 2040-07-10
Also published as: CN111720191A

Abstract

The invention relates to a DPF cleaning method and a cleaning machine for regenerating a particle filter (DPF), which adopts a compressed air double spray head to respectively sweep two ends of the DPF, adds particle powder into a compressed air flow channel of the spray head positioned in the direction of the end surface of the DPF accumulated particles, pushes the particle powder to be ejected from the spray head through the flow of the compressed air, and can quickly clean and remove the particles accumulated by the DPF.

Description

DPF cleaning method and cleaning machine thereof

Technical Field

The present invention relates to a diesel engine emission control technology, and more particularly, to a particulate filter (DPF) cleaning method for DPF regeneration and a cleaner thereof.

Background

Particulate Filters (DPFs) used in diesel engine exhaust aftertreatment technologies can filter out particulates in the engine exhaust, which mainly include carbon particles and ash, the carbon particles can be catalytically burned off when the exhaust temperature reaches above the catalytic combustion temperature of the carbon particles, but the ash gradually accumulates in the DPF, more and more, the carbon particles accumulate when the exhaust temperature does not reach the catalytic combustion temperature for a long time, and after the total particulate matter reaches a certain amount, the backpressure of the DPF increases to affect the normal operation of the engine, so that the engine needs to be cleaned and regenerated in time.

CN102536392a discloses a diesel engine exhaust gas purifier with a rotary regeneration device, which comprises a diesel engine exhaust gas purifier body, a regeneration nozzle and a regeneration catalytic device, wherein the regeneration nozzle is in a slender straight line shape and is opposite to the rear end plane of a filter workpiece of the diesel engine exhaust gas purifier body, the nozzle is connected with a rotary mechanism, and the rotary mechanism drives the rotary mechanism to rotate slowly; and (3) reversely purging each filtering channel of the filter workpiece through the regeneration nozzle by the pressurized diesel engine tail gas, and blowing the soot particles stored in the filter workpiece to the oxidation catalytic device for treatment and then flowing to the subsequent purifier.

CN106050364A is a rotary diesel particulate filter blowback cleaning device, including blowback cleaning unit and connecting element, compressed air quick-operation joint one end and outside compressed air are linked together in the blowback cleaning unit, the compressed air quick-operation joint other end is connected with rotary joint one side through compressed air pipeline, the rotary joint opposite side is connected with rotary nozzle, rotary nozzle includes pipe and a set of shower nozzle, rotary nozzle arranges in being cleared up DPF unit ash surface top, and the shower nozzle is towards DPF unit ash surface, along circumference evenly distributed there being three or more than three orifice on the shower nozzle.

CN106703943a discloses a diesel particulate filter back-blowing regenerating device, which comprises a bracket and a ring gear; the support is fixed inside the particle catcher shell at the rear end of the particle catcher, the diameter of the ring gear is smaller than the inner diameter of the particle catcher shell, and the center of the support is connected with the center of the ring gear through a rotating shaft; the ring gear is meshed with a driving gear in a protection housing arranged outside the particle catcher shell through a slot on the particle catcher shell, the ring gear is provided with a nozzle which freely moves along the diameter direction, the nozzle is connected with the edge of the ring gear through a return spring, and an air outlet of the nozzle faces the particle catcher carrier.

CN110067616a discloses a DPF cleaning machine, which comprises a frame, a PLC control device arranged at one side of the frame and used for controlling the whole machine to run, a pneumatic cleaning device arranged inside the frame and used for cleaning a DPF, a three-jaw chuck locking device used for locking the DPF, a collecting device arranged below the pneumatic cleaning device and used for collecting PM particles, and a secondary filtering device arranged behind the collecting device.

These cleaning agents have low compressed air density, and therefore have insufficient impact force on the particulates accumulated and agglomerated in the deep portion of the DPF duct, and require a long time for purging to blow out the particulates in the deep portion of the DPF duct, so that it generally takes 3 to 5 hours to clean one DPF.

Disclosure of Invention

The invention aims to provide a DPF cleaning method and a DPF cleaning machine capable of quickly cleaning and removing particulates accumulated in a DPF.

The DPF cleaning method of the invention adopts the compressed air double spray heads to respectively sweep the two ends of the DPF, and is characterized in that the particle powder is added into a compressed air flow passage of the spray heads positioned in the direction of the end surface of the DPF accumulated particles, and the particle powder is pushed to be ejected from the spray heads through the flow of the compressed air.

Preferably, the particulate powder is particulate matter purged from the DPF, alumina powder, quartz powder or other mineral powder. More preferably particulate matter that is purged from the DPF.

The DPF cleaning machine comprises a box body, wherein a table top used for placing a DPF and enabling the DPF to rotate is arranged in the box body, a first spray head is positioned in the end face direction of non-accumulated particles of the DPF, the first spray head is connected with a compressed air source through a pipeline, the first spray head can be moved to the end face of the DPF and reset to an axial transfer mechanism away from the end face of the DPF, the first spray head can be moved radially on the end face of the DPF, a second spray head is positioned in the end face direction of accumulated particles of the DPF, the second spray head is connected with the radial transfer mechanism which can be moved radially on the end face of the DPF, the second spray head is connected with the compressed air source through a pipeline, a particle powder adding device is arranged in a compressed air flow channel, particle powder is added into the compressed air flow channel from the particle powder adding device, the particle powder is pushed to be ejected from the second spray head through the flow of the compressed air, and a negative pressure collecting box is connected with the box body and used for collecting the particles blown from the DPF.

Preferably, the particulate powder adding device is located in the collection tank.

The particulate powder adding device comprises a powder collecting funnel, a powder conveying mechanism is connected below the powder collecting funnel, and the output end of the powder conveying mechanism is connected with the compressed air channel.

The powder conveying mechanism comprises a rotating shaft and a sleeve thereof, wherein the sleeve is respectively provided with a funnel access hole and a compressed air channel access hole, the rotating shaft is driven by a motor, the rotating shaft is in a gear shape to form a plurality of grooves, powder can be filled into the grooves when the grooves face the funnel in the rotating process of the rotating shaft, and the powder enters the compressed air channels when the grooves face the compressed air channels.

A filter screen is arranged above the funnel.

The negative pressure collecting box is provided with a through hole, a filter cloth bag is connected above the through hole, the filter cloth bag is arranged in the sealing box, and the upper part of the sealing box is communicated with the negative pressure end of the negative pressure fan.

The filter cloth bag is connected with a vibration or swinging device.

According to the invention, compressed air with the particle powder is adopted to sweep the end face direction of accumulated particles of the DPF, the airflow enters the honeycomb holes and has larger impact force, the particles accumulated in the deep part of the DPF honeycomb holes are impacted and crushed, the particles accumulated in the deep part of the DPF can be easily removed, the DPF cleaning time can be reduced by more than 50%, and the cleaning effect is improved.

Drawings

Fig. 1 is an external view of an embodiment of the present invention.

Fig. 2 is a perspective view of the embodiment of fig. 1.

Fig. 3 is a particulate powder adding device.

Fig. 4 is a K-K cross-sectional view.

FIG. 5 is a schematic diagram of the DPF removal state.

Fig. 6 is a first spray head and its axial and radial transfer mechanisms.

Fig. 7 is a second injector head and its radial transfer mechanism located below the DPF.

Fig. 8 is a left side perspective view of the embodiment of fig. 1.

Fig. 9 is a top view of fig. 1.

Fig. 10 is a sectional view of B-B of fig. 9.

Detailed Description

As shown in fig. 1, one embodiment of the present invention includes a case 1, a door 13 that can be opened and closed is provided in front of the case 1, and in an operating state, dust can be prevented from flying by closing the door 13, and a negative pressure collecting box 2 is provided below the case 1.

As shown in fig. 2 and 5, the case 1 has a table top 3 for accommodating a DPF, the table top 3 is a rotatable hollow platform driven by a motor, the DPF is hung on the edge of the hole from a packing sleeve 4 provided with the DPF, and the DPF is in a hanging state, and the DPF can be rotated by the rotation of the table top 3. In operation, the non-accumulated particulate matter end of the DPF is oriented upward and the accumulated particulate matter end of the DPF is oriented downward.

The negative pressure collecting box 2 is provided with a particle powder collecting funnel 50 and a powder adding device 51, as shown in fig. 3 and 4, the particle powder adding device 51 comprises a rotating shaft 53 and a sleeve 54 thereof, the sleeve 54 is provided with an access hole connected with the lower part of the funnel and an access hole connected with a compressed air channel 55, the rotating shaft 53 is driven by a motor 56, the rotating shaft 53 is in a gear shape so as to form a plurality of grooves 57, during the rotation of the rotating shaft 53, particle powder can be filled when the grooves 57 are upwards arranged in the funnel access hole, and when the grooves 57 are downwards arranged in the compressed air channel 55 access hole, the particle powder enters the compressed air channel. Above the powder collection funnel 50 is a filter screen 52 to prevent larger particles from entering the funnel. The particulate powder for addition to the compressed air flow passage may be particulate purged from the DPF, alumina powder, quartz powder or other solid powder such as dry ice powder, preferably particulate purged from the DPF.

Fig. 6 shows a radial transfer mechanism and an axial transfer mechanism of the first nozzle 5, the first nozzle 5 is located on the upper end face of the DPF, the radial transfer mechanism includes a jig 6 and a guide rail 7, the first nozzle 5 is mounted on the jig 6, the jig 6 is connected to the guide rail 7, and the jig 6 can be moved laterally along the guide rail 7 by driving of a driving mechanism, thereby causing the first nozzle 5 to reciprocate radially on the upper end face of the DPF. The axial transfer mechanism comprises a guide rail 8 and a connecting component which is connected to the guide rail 7 and matched with the guide rail 8, and the guide rail 7 and the clamp 6 are driven by the driving mechanism to move up and down along the guide rail 8, so that the first spray head 5 can move to the end face of the DPF and leave the axial reciprocating transfer mechanism for resetting the end face of the DPF.

As shown in fig. 7, a second nozzle 9 is arranged below the DPF, the second nozzle 9 is mounted on a jig 10, the jig 10 is connected to a guide rail 11, and the jig 10 is driven by a driving mechanism to move laterally along the guide rail 11, thereby causing the second nozzle 9 to reciprocate radially at the lower end surface of the DPF. The second nozzle 9 provides a direct flow of air with the particulate powder entrained therein, providing a greater impact force and range for blowing air from the cells of the DPF and a greater impact force for purging particulates accumulated in the deep cells.

Fig. 8, 9 and 10 show the particle collection system that sweeps out, including the negative pressure collecting box that is located the rotary table top lower part, there is the through-hole negative pressure collecting box 2 lateral part top, is connected with the filtration sack 32 through pipeline 31 above the through-hole, and this filtration sack is arranged in seal box 36, and the negative pressure end of this seal box 36 upper portion intercommunication negative pressure fan. The filter cloth bag 32 is connected with a vibration or swinging device 35, which can reduce the blockage caused by the aggregation of particles on the filter cloth bag 32. The drawer type storage body 34 is arranged on the lower portion of the negative pressure collecting box 2, so that the blown-out particles can be collected, and after a certain amount of particles reach, the drawer type storage body 34 is taken out, so that pollution-free treatment can be carried out on the particles.

In the working process, the end face of the DPF is located above, the end face of the DPF is located below, the DPF is in a rotating state, the first spray nozzle 5 above the end face of the DPF moves downwards to be close to the end face of the DPF, compressed air is started to blow the DPF from the upper part of the DPF, accumulated particles are blown out from the lower part through a wall flow hole of the DPF, compressed air with particle powder is clamped into a honeycomb hole of the DPF from the second spray nozzle 9 upwards, the particles agglomerated in the deep part in the honeycomb hole are crushed and fall off through the impact of the particle powder, and therefore the accumulated particles of the DPF can be cleaned rapidly.

Claims

1. The DPF cleaning machine is characterized by comprising a box body, wherein a table surface for placing a DPF and enabling the DPF to rotate is arranged in the box body, a first spray head is positioned in the end face direction of non-accumulated particles of the DPF, the first spray head is connected with a compressed air source through a pipeline, an axial transfer mechanism capable of enabling the first spray head to move to the end face of the DPF and reset away from the end face of the DPF, a radial transfer mechanism capable of enabling the first spray head to radially move on the end face of the DPF is arranged in the end face direction of accumulated particles of the DPF, a radial transfer mechanism capable of enabling the second spray head to radially move on the end face of the DPF is connected with the compressed air source through a pipeline, particle powder is added into a compressed air channel from a particle powder adding device, the particle powder is pushed to be ejected from the second spray head through the flow of compressed air, and a negative pressure collecting box is connected with the box body and used for collecting the particles purged from the DPF;

the particle powder adding device is positioned in the collecting box; the particulate powder adding device comprises a powder collecting funnel, a powder conveying mechanism is connected below the powder collecting funnel, and the output end of the powder conveying mechanism is connected with the compressed air channel; the powder conveying mechanism comprises a rotating shaft and a sleeve thereof, wherein a funnel access hole and a compressed air channel access hole are respectively formed in the sleeve, the rotating shaft is driven by a motor, the rotating shaft is in a gear shape so as to form a plurality of grooves, powder can be filled when the grooves face the funnel in the rotating process of the rotating shaft, and the powder enters the compressed air channel when the grooves face the compressed air channel;

2. The DPF cleaning machine of claim 1, wherein a filter screen is provided above the hopper.

3. The DPF cleaning machine according to claim 1, wherein the filter cloth bag is connected with a vibration or swing device.

4. A cleaning method of a DPF cleaning machine according to any one of claims 1 to 3, wherein both ends of the DPF are purged by using two compressed air nozzles, respectively, and the particulate powder is added into a compressed air passage of the nozzle located in the direction of the end face of the DPF where the particulate matter is accumulated, and is pushed to be ejected from the nozzle by the flow of the compressed air.

5. The DPF cleaning method of claim 4, wherein the particulate powder is particulate, alumina powder, quartz powder or other solid powder purged from the DPF.

6. The DPF cleaning method of claim 5, wherein the particulate powder is particulate matter purged from the DPF.