CN114183227A - Double-pipeline flue gas treatment system - Google Patents
Double-pipeline flue gas treatment system Download PDFInfo
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- CN114183227A CN114183227A CN202111571297.3A CN202111571297A CN114183227A CN 114183227 A CN114183227 A CN 114183227A CN 202111571297 A CN202111571297 A CN 202111571297A CN 114183227 A CN114183227 A CN 114183227A
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- valve body
- flue gas
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- gas treatment
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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
- 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
- F01N13/011—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 having two or more purifying devices arranged in parallel
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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
- 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
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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
- 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
- F01N13/08—Other arrangements or adaptations of exhaust conduits
- F01N13/10—Other arrangements or adaptations of exhaust conduits of exhaust manifolds
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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
- F01N3/033—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 in combination with other devices
- F01N3/035—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 in combination with other devices with catalytic reactors, e.g. catalysed diesel particulate filters
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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
- F01N9/00—Electrical control of exhaust gas treating apparatus
Abstract
The invention discloses a double-pipeline flue gas treatment system, which comprises a main pipeline, branch pipelines and a main control system, wherein the main pipeline is connected with the branch pipelines; the two ends of the main pipeline are respectively provided with an air inlet and an air outlet; the DOC and DPF device is arranged in the middle of the main pipeline; the branch pipeline is connected with the DOC and DPF devices in parallel, and two ends of the branch pipeline are respectively communicated with two ends of the main pipeline close to the port openings of the main pipeline; the middle part of the branch pipeline is provided with a valve body control device; the main control system is electrically connected with the control end of the valve body control device and can control the valve body control device to open and close according to the starting state of the engine. According to the invention, the DOC and DPF devices are introduced, the DOC and DPF devices act during starting to block PM10 particulate matters in the tail gas, and after the starting is stable, the valve body control device is opened to short-circuit the flue gas and recover normal emission from the DOC and DPF device modes, so that reasonable exhaust can be realized, and the tail gas purification effect is better.
Description
Technical Field
The invention relates to the technical field of trackless rubber-tyred vehicles, in particular to a double-pipeline flue gas treatment system for a trackless rubber-tyred vehicle and a control method thereof.
Background
The trackless rubber-tyred car includes packing box and locomotive, and one side of locomotive is equipped with the driver's cabin, and the front portion and the rear portion of driver's cabin are equipped with copilot seat and main driver's seat respectively relatively, are equipped with the operation control platform between main, the copilot seat, are equipped with the panel board on the left side wall that is close to main driver's seat in the driver's cabin. The trackless rubber-tyred vehicle produced by our company adopts a one-room two-seat structure to solve the problem that the vehicle can run in two directions without turning around in the mine tunnel operation, and the length of the vehicle body is shortened, so that the vehicle becomes small and flexible; meanwhile, the operation control structure is simplified, repeated setting is reduced, and the system cost is reduced; the cab is more in line with the ergonomic layout and more convenient to operate.
However, the treatment of tail gas emission of trackless rubber-tyred vehicles is currently a more critical technical problem. The method mainly comprises the treatment of HC and CO in diesel particles and tail gas, and DOC and DPF devices are mostly adopted at present.
DPF, which is an abbreviation of diesel particulate filter, is installed in an exhaust system and can filter and capture Particulate Matters (PM) in exhaust gas, and can reduce the PM in the exhaust gas, and the filtering effect can reach 70% -90%.
DOC is an abbreviation for diesel oxidation catalyst. DOCs generally use metal or ceramic as a catalyst carrier, and the main active components in the coating are precious metals and rare metals such as platinum series and palladium series. When the exhaust gas of the diesel engine passes through the catalyst, HC (hydrocarbon) and CO (carbon monoxide) can quickly react with oxygen in the exhaust gas at a relatively low temperature to form ammonia-free diesel fuelContaminated H2O and CO2The DOC achieves the purpose of purifying HC and CO in the tail gas.
However, when filtering the exhaust gas, the HC and CO in the diesel particulates and the exhaust gas are too high at the moment of starting, or the DOC and DPF device are required to be used for a long time, which causes the waste of the equipment due to the continuous DOC and DPF device treatment and affects the exhaust effect.
Therefore, how to provide a pipeline flue gas treatment system capable of realizing reasonable exhaust and a control method thereof are problems to be solved urgently by those skilled in the art.
Disclosure of Invention
In view of this, the present invention provides a dual-pipeline flue gas treatment system, which aims to solve the above technical problems.
In order to achieve the purpose, the invention adopts the following technical scheme:
a dual duct flue gas treatment system comprising:
a main pipeline; the two ends of the main pipeline are respectively provided with an air inlet and an air outlet; the DOC and DPF device is arranged in the middle of the main pipeline;
branch pipelines; the branch pipeline is connected with the DOC and DPF devices in parallel, and two ends of the branch pipeline are respectively communicated with two ends of the main pipeline close to the port openings of the main pipeline; the middle part of the branch pipeline is provided with a valve body control device;
a master control system; the main control system is electrically connected with the control end of the valve body control device and can control the valve body control device to be opened and closed according to the starting state of the engine.
Through the technical scheme, the DOC and DPF device are introduced, the DOC and DPF device play a role during starting to block PM10 particulate matters in tail gas, after the starting is stable, the valve body control device is started to short-circuit the flue gas, the mode of separating from the DOC and DPF device is recovered to normal discharge, reasonable exhaust can be realized, and the tail gas purification effect is better.
Preferably, in the above dual-pipeline flue gas treatment system, a first check valve is installed on the main pipeline; the first check valve is located between the rear ends of the DOC and DPF devices and the branch pipe. The first one-way valve can prevent the smoke from flowing back to the main pipeline when the branch pipeline is discharged.
Preferably, in the above dual-pipe flue gas treatment system, the branch pipe is provided with a second check valve; the second one-way valve is positioned between the rear end of the valve body control device and the main pipeline. The second check valve can prevent the flue gas from flowing back to the branch pipeline when the main pipeline discharges.
Preferably, in the above dual-pipeline flue gas treatment system, the master control system includes a master control chip and a timer chip which are electrically connected; the main control chip is electrically connected with the engine and used for capturing opening and closing signals of the engine; the main control chip is electrically connected with the control end of the valve body control device. The main control chip and the timer chip can control exhaust according to the starting time of the engine, the general timing time is 10-15s, and a good tail gas pollution control effect can be achieved.
Preferably, in the above dual-pipe flue gas treatment system, the valve body control device comprises a valve body, a fixed valve flap, a rotating shaft, and a movable valve flap; the valve body is of a valve body structure with openings at two ends and is fixedly arranged on the inner side of the branch pipeline; the edge of the fixed valve clack is radially fixed on the inner wall of the valve body; two ends of the rotating shaft are rotatably connected to the inner wall of the valve body, and one end of the rotating shaft penetrates through the valve body and the branch pipeline and is used for being connected with a servo motor for driving the rotating shaft to rotate; the axial edge of one side of the rotating shaft is attached to the non-connecting edge of the fixed valve clack; one side edge of the movable valve clack is fixed with the axial edge of the other side of the rotating shaft, and the other edges of the movable valve clack are attached to the inner wall of the valve body. The valve body structure adopted by the invention has a better control effect, can be suitable for various places with control requirements on air quantity, can realize the control on the opening size of the movable valve clack by adjusting the rotation of the rotating shaft, and has the advantages of simple operation and convenient control.
Preferably, in the above dual-duct flue gas treatment system, the fixed valve flap and the movable valve flap are semi-circular or semi-circular-like, and the fixed valve flap and the movable valve flap can be spliced to form a circle along the extension line of the arc-shaped edge; the inner wall of the valve body is provided with a flange which is protruded in the radial direction, and the flange is respectively attached to the surfaces of the fixed valve clack and the movable valve clack. The shape design can ensure the sealing performance when the fixed valve clack and the movable valve clack are closed; the flange can further improve the sealing performance of the fixed valve clack and the movable valve clack, and can limit the movable valve clack to open and close towards the same direction.
Preferably, in the above dual-duct flue gas treatment system, the side wall of the valve body is provided with a mounting plate penetrating out of the branch duct; the servo motor is fixed on the mounting plate; the servo motor is electrically connected with the main control chip. The installation of servo motor is convenient.
Preferably, in the above-mentioned double-pipe flue gas treatment system, a flue gas concentration detector is installed at an air inlet of the main pipe. Can monitor the flue gas concentration to this carries out exhaust control.
Preferably, in the above dual-pipeline flue gas treatment system, the control method of the dual-pipeline flue gas treatment system is as follows:
initial switching mode: the valve body control device is in a normally closed state; when the engine is started, the main control chip transmits a starting signal of the engine to the timer chip, the timer chip counts down, and after the countdown of the timer chip is completed, the main control chip controls the servo motor to open the valve body control device, so that the DOC and DPF are switched to the non-filtering exhaust gas when the engine is started;
and (3) switching the process: in the running process of the engine, the smoke concentration detector monitors the concentration and feeds monitoring data back to the main control chip in real time; when the concentration of the flue gas reaches a limit level, the main control chip transmits a signal to the servo motor; the higher the grade of the smoke concentration is, the smaller the opening of the movable valve clack is driven by the servo motor;
resetting mode: when the engine is closed, the servo motor controls the valve body control device to recover a normally closed state, and the data of the main control chip and the timer chip are cleared to wait for the next starting of the engine.
The invention provides a brand new flue gas treatment mode, wherein DOC and DPF filtration and non-filtration exhaust switching are realized within a set time initially, and when the novel flue gas treatment mode is operated, the flow control of a valve body control device is carried out according to the flue gas concentration grade, so that the exhaust mode is more reasonable, and the tail gas pollution can be effectively controlled.
Preferably, in the above-mentioned dual-duct flue gas treatment system, in the process switching mode, the restriction level is a plurality of level criteria classified according to a rise in flue gas concentration, each of the level criteria having an opening size of the movable flap corresponding thereto. The limit level provided by the invention is that the limit level is entered when the concentration reaches a dangerous value, and is divided into a plurality of levels above the dangerous value, in other words, when the concentration is below the dangerous value, the process switching mode is not started all the time, and when the concentration returns to be below the dangerous value above the dangerous value, the process switching mode is stopped.
Through the technical scheme, compared with the prior art, the invention discloses and provides a double-pipeline flue gas treatment system, which has the following beneficial effects:
1. according to the invention, the DOC and DPF devices are introduced, the DOC and DPF devices act during starting to block PM10 particulate matters in the tail gas, and after the starting is stable, the valve body control device is opened to short-circuit the flue gas and recover normal emission from the DOC and DPF device modes, so that reasonable exhaust can be realized, and the tail gas purification effect is better.
2. The invention provides a brand new flue gas treatment mode, wherein DOC and DPF filtration and non-filtration exhaust switching are realized within a set time initially, and when the novel flue gas treatment mode is operated, the flow control of a valve body control device is carried out according to the flue gas concentration grade, so that the exhaust mode is more reasonable, and the tail gas pollution can be effectively controlled.
3. The valve body structure adopted by the invention has a better control effect, can be suitable for various places with control requirements on air quantity, can realize the control on the opening size of the movable valve clack by adjusting the rotation of the rotating shaft, and has the advantages of simple operation and convenient control.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the provided drawings without creative efforts.
FIG. 1 is a schematic diagram of a dual duct flue gas treatment system according to the present invention;
FIG. 2 is a schematic structural diagram of a valve body control device provided by the present invention;
fig. 3 is a block diagram of a master control system according to the present invention.
Wherein:
1-a main pipeline;
11-an air inlet; 12-an exhaust port; 13-a first one-way valve; 14-a smoke concentration detector;
2-branch pipelines;
21-a second one-way valve;
3-a master control system;
31-a main control chip; 32-a timer chip;
4-DOC and DPF devices;
5-valve body control device;
51-a valve body; 52-fixed flap; 53-a rotating shaft; 54-a movable flap; 55-a servo motor; 56-a flange; 57-a mounting plate;
6-engine.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Referring to fig. 1 to fig. 3, an embodiment of the present invention discloses a dual-pipeline flue gas treatment system, including:
a main pipeline 1; the two ends of the main pipeline 1 are respectively provided with an air inlet 11 and an air outlet 12; the DOC and DPF device 4 is arranged in the middle of the main pipeline 1;
a branch pipe 2; the branch pipeline 2 is connected with the DOC and DPF device 4 in parallel, and two ends of the branch pipeline are respectively communicated with two ends of the main pipeline 1 close to the port thereof; the middle part of the branch pipeline 2 is provided with a valve body control device 5;
a master control system 3; the main control system 3 is electrically connected to the control end of the valve body control device 5, and can control the opening and closing of the valve body control device 5 according to the starting state of the engine 6.
In order to further optimize the technical scheme, a first one-way valve 13 is installed on the main pipeline 1; the first check valve 13 is located between the rear end of the DOC and DPF device 4 and the branch pipe 2.
In order to further optimize the technical scheme, a second one-way valve 21 is arranged on the branch pipeline 2; the second check valve 21 is located between the rear end of the valve body control device 5 and the main pipe 1.
In order to further optimize the above technical solution, the main control system 3 includes a main control chip 31 and a timer chip 32 which are electrically connected; the main control chip 31 is electrically connected with the engine 6 and used for capturing opening and closing signals of the engine 6; the main control chip 31 is electrically connected to the control end of the valve body control device 5.
In order to further optimize the above technical solution, the valve body control device 5 comprises a valve body 51, a fixed valve flap 52, a rotating shaft 53 and a movable valve flap 54; the valve body 51 is of a valve body structure with openings at two ends and is fixedly arranged on the inner side of the branch pipeline 2; the edge of the fixed valve clack 52 is radially fixed on the inner wall of the valve body 51; the two ends of the rotating shaft 53 are rotatably connected to the inner wall of the valve body 51, and one end of the rotating shaft passes through the valve body 51 and the branch pipeline 2 and is connected with a servo motor 55 for driving the rotating shaft 53 to rotate; the axial edge of one side of the rotating shaft 53 is attached to the non-connecting edge of the fixed valve clack 52; one side edge of the movable valve clack 54 is fixed with the other axial edge of the rotating shaft 53, and the other edge of the movable valve clack 54 is attached to the inner wall of the valve body 51.
In order to further optimize the technical scheme, the fixed valve clack 52 and the movable valve clack 54 are in a semi-circle or semi-circle-like shape, and the fixed valve clack 52 and the movable valve clack 54 can be spliced to form a circle along the extension line of an arc edge; the inner wall of the valve body 51 has radially protruding ribs 56, and the ribs 56 respectively abut against the surfaces of the fixed valve flap 52 and the movable valve flap 54.
In order to further optimize the technical scheme, the side wall of the valve body 51 is provided with a mounting plate 57 penetrating out of the branch pipeline 2; the mounting plate 57 is fixed with the servo motor 55; the servo motor 55 is electrically connected to the main control chip 31.
In order to further optimize the above technical solution, a flue gas concentration detector 14 is installed at the air inlet 11 of the main pipeline 1.
The control method of the double-pipeline flue gas treatment system comprises the following steps:
initial switching mode: the valve body control device 5 is in a normally closed state; when the engine 6 is started, the main control chip 31 transmits a starting signal of the engine 6 to the timer chip 32, the timer chip 32 counts down, after the countdown of the timer chip 32 is completed, the main control chip 31 controls the servo motor 55 to open the valve body control device 5, and the switching control from DOC and DPF filtration to non-filtration exhaust when the engine 6 is started is completed;
and (3) switching the process: during the running process of the engine 6, the flue gas concentration detector 14 monitors the concentration and feeds back the monitoring data to the main control chip 31 in real time; when the concentration of the flue gas reaches the limit level, the main control chip 31 transmits a signal to the servo motor 55; the higher the smoke concentration level is, the smaller the opening of the movable valve flap 54 driven by the servo motor 55 is;
resetting mode: when the engine 6 is shut down, the servo motor 55 controls the valve body control device 5 to recover to the normally closed state, and the data of the main control chip 31 and the timer chip 32 are cleared to wait for the next start of the engine 6.
In the process switching mode, the restriction level is a plurality of level criteria classified according to the rise in smoke concentration, each level criterion having an opening size of the movable flap 54 corresponding thereto. The limit level provided in this embodiment is that the limit level is entered only when the concentration reaches a dangerous value, and is subdivided into a plurality of levels above the dangerous value, in other words, when the concentration is below the dangerous value, the process switching mode is not started all the time, and when the concentration returns above the dangerous value to below the dangerous value, the process switching mode is stopped.
DOC and DPF device 4 are introduced to this embodiment, and DOC and DPF device 4 play a role during the start-up, block tail gas PM10 particulate matter, start stable back, and valve body controlling means 5 opens, breaks away from DOC and DPF device 4 modes and resumes normal emission with the flue gas short circuit, can realize reasonable exhaust, and exhaust purification effect is better. This embodiment provides a brand-new flue gas treatment mode, and at the beginning, realize DOC and DPF in the settlement time and filter exhaust switching with no filtration, when the operation, carry out valve body controlling means 5's flow control according to flue gas concentration grade, the exhaust mode is more reasonable, can effectively control exhaust pollution.
In a specific embodiment, when the engine 6 is started, the exhaust gas passes through the DOC and the DPF device 4 to carry out oxidation reduction on HC and CO, the PM10 particulate matters in the exhaust gas are captured, the valve body control device 5 is automatically opened after 10-15S, the double-layer main exhaust pipe is directly fed into the exhaust gas treatment box after the main exhaust gas flows through the valve body control device 5 after 95% of the short circuit of the channel, and only 2% of trace gas flows through the channel DOC and the DPF device 4, so that a working cycle is completed, the valve body control device 5 is in an open state, and the valve body control device 5 is automatically reset when the engine 6 is shut down.
The embodiments in the present description are described in a progressive manner, each embodiment focuses on differences from other embodiments, and the same and similar parts among the embodiments are referred to each other. The device disclosed by the embodiment corresponds to the method disclosed by the embodiment, so that the description is simple, and the relevant points can be referred to the method part for description.
The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the invention. Thus, the present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.
Claims (10)
1. A dual duct flue gas treatment system, comprising:
a main conduit (1); an air inlet (11) and an air outlet (12) are respectively arranged at the two ends of the main pipeline (1); the DOC and DPF device (4) is arranged in the middle of the main pipeline (1);
a branch duct (2); the branch pipeline (2) is connected with the DOC and DPF device (4) in parallel, and two ends of the branch pipeline are respectively communicated with two ends of the main pipeline (1) close to the port openings of the main pipeline; the middle part of the branch pipeline (2) is provided with a valve body control device (5);
a master control system (3); the main control system (3) is electrically connected with the control end of the valve body control device (5), and can control the valve body control device (5) to be opened and closed according to the starting state of the engine (6).
2. A double-pipe flue gas treatment system according to claim 1, wherein a first one-way valve (13) is mounted on the main pipe (1); the first check valve (13) is located between the rear end of the DOC and DPF device (4) and the branch pipe (2).
3. A double-pipe flue gas treatment system according to claim 2, wherein a second one-way valve (21) is mounted on the branch pipe (2); the second one-way valve (21) is positioned between the rear end of the valve body control device (5) and the main pipeline (1).
4. The dual-pipeline flue gas treatment system according to any one of claims 1-3, wherein the master control system (3) comprises a master control chip (31) and a timer chip (32) which are electrically connected; the main control chip (31) is electrically connected with the engine (6) and is used for capturing opening and closing signals of the engine (6); the main control chip (31) is electrically connected with the control end of the valve body control device (5).
5. The dual duct flue gas treatment system of claim 4 wherein the valve body control means (5) comprises a valve body (51), a fixed flap (52), a rotating shaft (53) and a movable flap (54); the valve body (51) is of a valve body structure with openings at two ends and is fixedly arranged on the inner side of the branch pipeline (2); the edge of the fixed valve clack (52) is radially fixed on the inner wall of the valve body (51); two ends of the rotating shaft (53) are rotatably connected to the inner wall of the valve body (51), one end of the rotating shaft penetrates through the valve body (51) and the branch pipeline (2), and the rotating shaft is used for being connected with a servo motor (55) for driving the rotating shaft (53) to rotate; the axial edge of one side of the rotating shaft (53) is attached to the non-connecting edge of the fixed valve clack (52); one side edge of the movable valve clack (54) is fixed with the other axial edge of the rotating shaft (53), and the other edge of the movable valve clack (54) is attached to the inner wall of the valve body (51).
6. The dual duct flue gas treatment system of claim 5 wherein the stationary flap (52) and the movable flap (54) are semi-circular or semi-circular like in shape and the stationary flap (52) and the movable flap (54) are capable of being joined to form a circle along the extension of the arcuate edges; the inner wall of the valve body (51) is provided with a rib (56) protruding in the radial direction, and the rib (56) is respectively attached to the surfaces of the fixed valve clack (52) and the movable valve clack (54).
7. A dual flue gas treatment system according to claim 5 wherein the side wall of the valve body (51) has a mounting plate (57) which extends out of the branch flue pipe (2); the servo motor (55) is fixed on the mounting plate (57); the servo motor (55) is electrically connected with the main control chip (31).
8. A dual duct flue gas treatment system according to any of claims 5-7, wherein a flue gas concentration detector (14) is mounted at the gas inlet (11) of the main duct (1).
9. The dual-duct flue gas treatment system of claim 8, wherein the control method of the dual-duct flue gas treatment system is as follows:
initial switching mode: the valve body control device (5) is in a normally closed state; when the engine (6) is started, the main control chip (31) transmits a starting signal of the engine (6) to the timer chip (32), the timer chip (32) performs countdown, and after the countdown of the timer chip (32) is completed, the main control chip (31) controls the servo motor (55) to open the valve body control device (5) so as to complete the switching control from DOC and DPF filtration to non-filtration exhaust when the engine (6) is started;
and (3) switching the process: in the running process of the engine (6), the smoke concentration detector (14) monitors the concentration and feeds monitoring data back to the main control chip (31) in real time; when the concentration of the flue gas reaches a limit level, the main control chip (31) transmits a signal to the servo motor (55); the higher the smoke concentration level is, the smaller the opening of the movable valve flap (54) driven by the servo motor (55) is;
resetting mode: when the engine (6) is closed, the servo motor (55) controls the valve body control device (5) to recover to a normally closed state, the data of the main control chip (31) and the timer chip (32) are cleared, and the engine (6) is started next time.
10. The dual duct flue gas treatment system of claim 9, wherein in the process switching mode, the restriction level is a plurality of level criteria divided according to a rise in flue gas concentration, each of the level criteria having an opening size of the movable flap (54) corresponding thereto.
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20030110761A1 (en) * | 2001-12-13 | 2003-06-19 | Isuzu Motors Limited | Exhaust emission purification system for diesel engine |
| CN106593600A (en) * | 2016-12-26 | 2017-04-26 | 潍柴动力股份有限公司 | Exhaust postprocessing device and method used for engine |
| US20190017423A1 (en) * | 2017-07-14 | 2019-01-17 | Ford Global Technologies, Llc | Method and system for a particulate filter having a bypass |
| CN109441597A (en) * | 2018-09-03 | 2019-03-08 | 潍柴动力股份有限公司 | Post-process protection system and post-processing guard method |
| CN112746885A (en) * | 2021-01-14 | 2021-05-04 | 无锡市隆盛轨道科技有限公司 | Tail gas purification system and purification method for oil-fired train |
-
2021
- 2021-12-21 CN CN202111571297.3A patent/CN114183227A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20030110761A1 (en) * | 2001-12-13 | 2003-06-19 | Isuzu Motors Limited | Exhaust emission purification system for diesel engine |
| CN106593600A (en) * | 2016-12-26 | 2017-04-26 | 潍柴动力股份有限公司 | Exhaust postprocessing device and method used for engine |
| US20190017423A1 (en) * | 2017-07-14 | 2019-01-17 | Ford Global Technologies, Llc | Method and system for a particulate filter having a bypass |
| CN109441597A (en) * | 2018-09-03 | 2019-03-08 | 潍柴动力股份有限公司 | Post-process protection system and post-processing guard method |
| CN112746885A (en) * | 2021-01-14 | 2021-05-04 | 无锡市隆盛轨道科技有限公司 | Tail gas purification system and purification method for oil-fired train |
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