KR20220131688A - Operating method of reactor for bypass integrated exhaust gas purifying device - Google Patents

Abstract

The present invention relates to an operation method of a bypass integrated exhaust gas purifier reactor, capable of switching to a bypass mode, a purification mode, and a regeneration mode by controlling an operation of three dampers configured in the bypass reactor integrated exhaust gas purifier. The bypass integrated exhaust gas purifier reactor of the present invention comprises: a catalytic filter; a first damper; a second damper; and a third damper.

Description

OPERATING METHOD OF REACTOR FOR BYPASS INTEGRATED EXHAUST GAS PURIFYING DEVICE

The present invention relates to a method of operating a bypass-integrated exhaust gas purifier reactor for conversion of a purification mode, an ash removal mode and a bypass mode in a bypass-integrated exhaust gas purifier reactor in which the bypass flow path is integrated in the exhaust gas purifier reactor. is about

Diesel Oxidation Catalyst (DOC) and Nitrogen Oxide Removal Catalyst (DeNOx) to minimize the emission of air pollutants such as nitrogen oxides (NOx, Nitrogen Oxide) and particulate matter (PM) from diesel engines and to satisfy environmental regulations Catalyst) and diesel particulate filter (DPF, Diesel Particulate Filter), etc., are widely used in exhaust gas purification systems that are composed of complex processes. In addition, sDPF (SCR coated DPF) has been developed as a catalyst filter that can simultaneously remove nitrogen oxides (NOx) and particulate matter (PM) by coating a diesel particulate filter (DPF) with a selective reduction catalyst (SCR). has been and is being used.

In particular, the exhaust gas purifier for a diesel engine for a ship, an onshore plant, etc., unlike a car, has a large engine size and displacement, so the size of the purifier is also increased, so that the installation of the purifier has a large space limitation. In addition, for malfunction, maintenance, safety, etc. of the exhaust gas purification device during operation, the bypass pipe that can be discharged without going through the exhaust gas purification device requires additional space. In particular, when additionally installed in an existing facility, the The exhaust gas purifier and bypass pipe are restricted due to the narrow internal space.

In addition, the exhaust gas purification device using a filter such as a diesel particulate filter (DPF) or sDPF removes particulate matter (PM) trapped inside by a forced regeneration method using a heat source or a natural regeneration method using a chemical reaction and operates continuously. It also minimizes back pressure rise. However, ash accumulated in the filter structure is inorganic substances (K, Ca, etc.) derived from fuel oil and engine oil and cannot be removed by forced or natural regeneration methods. accumulates in the air and causes an irreversible rise in back pressure. Therefore, it is essential to remove the filter from the reactor, remove the ash by using compressed air injection, washer liquid injection, ultrasonic treatment, etc., and then install it again.

However, since ships and onshore plants have large engine size and displacement, it is not easy to remove and install the entire filter module after removing ash to remove ash because the catalyst filter cells are modularized and stacked. And there is the problem of high cost. Furthermore, even if the reactor integrating the bypass pipe is operated in the bypass mode, the temperature of the catalyst filter area is maintained high due to the arrangement of the exhaust gas, so that the ash removal process cannot be performed while the engine is running, The downside is that the engine must be stopped.

In addition, in the case of a narrow space condition, the ease of removal and re-installation of the filter module is further reduced, and damage to the filter in the process and deterioration of the performance of the purification device due to exhaust gas leakage between modules during the reloading of the deteriorated filter module are also prevented. can come from

Korean Patent Application No. 10-2018-0020215

In view of the above points, the present invention integrates the bypass flow path with the reactor and includes three dampers in a bypass integrated reactor for exhaust gas purification in which an ash blower for removing ash is installed in a catalyst filter for purifying exhaust gas to operate the engine An object of the present invention is to provide a method of operating a bypass integrated reactor for an exhaust gas purification device capable of removing ash accumulated in a catalyst filter regardless of the catalytic filter and controlling the operation in a purification mode and a bypass mode.

In order to achieve the above object, the bypass integrated exhaust gas purifier reactor of the present invention includes a diesel oxidation catalyst (DOC) installed in a reaction passage for purifying exhaust gas and an sDPF installed at the rear end of the diesel oxidation catalyst (DOC) or DPF and a catalyst filter in which the SCR is installed at the rear end of the DPF, a first damper installed at the rear end of the exhaust gas inlet to adjust the opening and closing of the bypass passage and the reaction passage, and a second damper installed in the rear end of the reaction passage to adjust the opening and closing of the reaction passage It may be configured to include a damper, and a third damper for discharging ash from the reaction passage to the outside.

The operation method of the bypass integrated exhaust gas purification device reactor configured as described above operates according to the bypass mode, the purification mode and the ash removal mode.

When the bypass integrated reactor for the exhaust gas purification device operates in the bypass mode, the reaction passage is closed by the first damper and the second damper, and the exhaust gas is introduced by driving the damper to open only the bypass passage. The exhaust gas introduced from the unit may be directly discharged through the exhaust gas discharge unit through only the bypass flow path.

In addition, when the bypass integrated reactor for the exhaust gas purifier operates in the bypass mode, the reaction passage is closed by the first damper and only the bypass passage is opened, but in the reaction passage, the catalyst filter temperature is equal to or higher than the set value. In this case, a reducing agent may be injected into the reaction passage and the exhaust gas introduced into the reaction passage may be purified using a catalyst filter.

stopping the injection of the reducing agent when the bypass-integrated exhaust gas purifier reactor is switched to the ash removal mode among the bypass mode; maintaining the first damper and the second damper in a closed state in a reaction flow path direction and opening a third damper; and removing ash by operating an ash blower installed at the rear end of the sDPF or the rear end of the DPF and the front end of the SCR.

blocking the bypass flow path by operating the first damper when the bypass-integrated exhaust gas purification device reactor is switched from the bypass mode to the purification mode; opening the bypass passage from the reaction passage by operating the second damper; and measuring the catalyst filter temperature to determine whether the measured catalyst filter temperature is equal to or higher than a set value, and when the catalyst filter temperature is equal to or higher than the set value, injecting a reducing agent into the reaction channel to purify the exhaust gas flowing into the reaction channel; operating modes can be switched.

when the bypass-integrated exhaust gas purifier reactor is switched from the purification mode back to the bypass mode, stopping injection of a reducing agent into the reaction passage; and operating the first damper and the second damper to close in the reaction passage direction to open only the bypass passage.

when the bypass-integrated exhaust gas purifier reactor is switched from the purification mode to the ash removal mode, stopping injection of a reducing agent into the reaction passage; maintaining the first damper and the second damper in a closed state toward the reaction flow path to open only the bypass flow path; opening the third damper; and removing ash by operating an ash blower installed at the rear end of the sDPF or the rear end of the DPF and the front end of the SCR.

Stopping the operation of the ash blower installed at the rear end of the sDPF or the rear end of the DPF and the front end of the SCR when the bypass integrated exhaust gas purifier reactor is switched from the ash removal mode to the purification mode; closing the third damper; opening the second damper in a bypass flow direction; operating the first damper to block the bypass flow path and open the reaction flow path; In the reaction passage, the catalyst filter temperature is measured to determine whether the measured catalyst filter temperature is greater than or equal to a set value, and when the catalyst filter temperature is greater than or equal to the set value, a reducing agent is injected into the reaction passage to purify the exhaust gas flowing into the reaction passage. operation mode can be switched including;

When the bypass integrated exhaust gas purifier reactor is switched from the ash removal mode to the bypass mode, the operation of the ash blower installed at the rear end of the sDPF or the rear end of the DPF and the front end of the SCR is stopped, and the third damper is closed The damper can be driven by;

The bypass integrated reactor for an exhaust gas purification device of the present invention simplifies the internal structure of the reactor by partitioning the bypass flow path inside one reactor to increase space utilization, and to remove ash without attaching or detaching the catalyst filter module. By configuring the blower and the damper for ash discharge, the ash of the catalyst filter can be effectively removed.

In addition, by implementing a simple operation method that can switch to bypass mode, purification mode and regeneration mode through the control of three dampers configured in the bypass integrated reactor for exhaust gas purification device, the regeneration process regardless of whether the engine is running This has the effect of increasing the easiness of operation of the exhaust gas purification system by allowing the ash accumulated in the catalyst filter to be removed.

1 is a block diagram of a bypass-integrated exhaust gas purifier reactor according to Example 1 of the present invention.
2 is a configuration diagram of a bypass-integrated exhaust gas purifier reactor according to a second embodiment of the present invention.
3 is a block diagram of a bypass-integrated exhaust gas purifier reactor according to a third embodiment of the present invention.
4 is a configuration diagram of a bypass-integrated exhaust gas purifier reactor according to a fourth embodiment of the present invention.
5 is a schematic diagram showing the operation of the damper and the flow of exhaust gas in the bypass-integrated exhaust gas purifier reactor of the present invention in the bypass mode.
6A is an operation method for switching from the bypass mode to the purification mode, and FIG. 6B is a flowchart illustrating an operation method for switching from the bypass mode to the ash removal mode.
7 is a schematic diagram showing the operation of the damper and the flow of exhaust gas in the bypass integrated exhaust gas purification device reactor of the present invention in the purification mode.
8A is an operation method for switching from the purification mode to the bypass mode, and FIG. 8B is a flowchart illustrating an operation method for switching from the purification mode to the ash removal mode.
9 is a schematic view showing the operation of the damper and the flow of exhaust gas in the bypass integrated exhaust gas purifier reactor of the present invention in the case of the ash removal mode.
10A is an operation method for switching from the ash removal mode to the purification mode, and FIG. 10B is a flowchart illustrating an operation method for switching from the ash removal mode to the bypass mode.

The present invention improves space utilization in an exhaust gas purification device reactor including a catalytic filter structure such as a diesel oxidation catalyst (DOC), a diesel particulate filter (DPF), a selective reduction catalyst (SCR), and an sDPF, and provides ash in the catalyst filter ) relates to an operating method of a bypass-integrated reactor that can be easily removed.

In more detail, the space is divided into a bypass flow path and a reaction flow path equipped with a catalyst filter using a partition structure inside the reactor, the exhaust gas flow is controlled in the flow path using a damper, and an ash blower (Ash blower) is installed inside the reactor. ) and a damper for discharging ash are separately installed to easily remove the ash collected inside the filter, which is a method of operating a bypass-integrated exhaust gas purifier reactor.

The terms used in the present application are only used to describe specific embodiments, and are not intended to limit the present invention. The singular expression includes the plural expression unless the context clearly dictates otherwise. In the present application, terms such as “comprise” or “have” are intended to designate that a feature, number, step, operation, component, part, or combination thereof described in the specification exists, but one or more other features It is to be understood that this does not preclude the possibility of the presence or addition of numbers, steps, operations, components, parts, or combinations thereof.

Hereinafter, an embodiment of an operating method of a preferred bypass integrated exhaust gas purifier reactor will be described in detail with reference to the accompanying drawings. In the drawings, the same or corresponding components are given the same reference numerals for convenience of explanation and understanding of the configuration, and repeated descriptions of the same components are omitted.

The bypass-integrated exhaust gas purifier reactor is installed at the rear end of the engine, and examples of specific configurations thereof are as shown in FIGS. 1 to 4 .

1 is a block diagram of a bypass-integrated exhaust gas purifier reactor according to Example 1 of the present invention.

Example 1 is a bypass-integrated exhaust gas purifier reactor using diesel oxidation catalyst (DOC) and sDPF as catalyst filters.

As shown in FIG. 1 , an exhaust gas inlet 11 through which exhaust gas from the engine is introduced, an exhaust gas outlet 13 through which exhaust gas is discharged from a bypass integrated reactor for an exhaust gas purification device, and the exhaust gas inlet A bypass flow passage 30 formed to bypass the exhaust gas introduced from the unit 11, a reaction flow passage 50 in which a catalyst filter for purifying exhaust gas is installed divided into the bypass flow passage and a partition wall, and installed in the reaction flow passage The ash blower 60 for removing the ash accumulated in the catalyst filter, the first damper 71 installed in the exhaust gas inlet 11 to adjust the opening and closing of the bypass flow path and the reaction flow path, the A second damper 73 installed at the rear end of the reaction passage to adjust opening and closing of the reaction passage, and a third damper 75 for discharging ash from the reaction passage to the outside may be included.

The bypass-integrated exhaust gas purifier reactor uses a bulkhead structure to simplify and increase the applicability of the internal structure of the reactor, and can increase space utilization in limited spaces such as ships, islands, and urban areas.

In the reaction passage 50 , the catalyst filter is installed at a rear end of a diesel oxidation catalyst (DOC) 41 for oxidizing hydrocarbons (HC) and carbon monoxide (CO) included in the exhaust gas, and the DOC 41 . An sDPF 43 comprising a catalyst coating layer in which the particulate matter contained in the filter is collected and the SCR catalyst is compositely coated on the wall surface of the diesel particulate filter (DPF) is provided.

A reducing agent nozzle for spraying a reducing agent is formed between the DOC 41 and the sDPF 43, and through the reducing agent nozzle, NH ₃ (g), NH ₃ (aq), urea (aq), urea (s), etc. ammonia (NH ₃ ) A reducing agent such as a precursor may be injected.

If urea is used as the reducing agent, a sufficient distance between the reducing agent nozzle where the reducing agent is injected and the front end of the sDPF is secured for hydrolysis, or urea is decomposed into ammonia through a separate decomposition device and then injected. It is particularly preferred.

The barrier rib dividing the bypass passage 30 and the reaction passage 50 may be divided into a first barrier rib 21 and a second barrier rib 23 depending on the damper to which they are connected, and the first barrier rib 21 has the A first damper 71 is installed on the exhaust gas inlet 11 side, and a second damper 73 is installed on one side of the second bulkhead 23 .

And the third damper 75 is formed between the DOC 41 and the sDPF 43 so that the ash separated from the catalyst filter through the ash blower 60 is discharged to the outside.

The ash blower 60 is installed in the reverse direction of the exhaust gas flow and sprays compressed air to remove ash accumulated in the sDPF or DPF with a catalyst filter installed in the reaction passage.

In removing the ash accumulated in the catalyst filter through the ash blower 60, the ash can be easily removed while the filter is loaded in the reactor, and the engine is in operation and continuously without engine stop even in the bypass mode. As the ash can be easily removed, the space utilization and operational easiness of the exhaust gas purification device can be improved.

In the bypass-integrated exhaust gas purifier reactor of the present invention, the damper has one end of the damper fixed and rotates to airtightly open or close the bypass flow path or the reaction flow path.

2 is a configuration diagram of a bypass-integrated exhaust gas purifier reactor according to a second embodiment of the present invention.

Example 2 consists of a DPF (45) and a selective reduction catalyst (SCR) (47) that sequentially collect particulate matter at the rear end of the DOC (41) as a catalyst filter, and is formed between the DOC (41) and the DPF (45). 3 It has the same configuration as the bypass-integrated exhaust gas purifier reactor of Example 1, except that the damper 75 is formed.

3 is a block diagram of a bypass-integrated exhaust gas purifier reactor according to a third embodiment of the present invention.

Example 3 divides the reaction zone of the reaction flow path, except that the hydrolysis pipe 90 through which the reducing agent flows is formed in front of the third damper 75 formed between the DOC 41 and the sDPF 43. It has the same configuration as the bypass-integrated exhaust gas purifier reactor of Example 1.

4 is a configuration diagram of a bypass-integrated exhaust gas purifier reactor according to a fourth embodiment of the present invention.

In Example 4, the reaction zone of the reaction passage is also divided, except that the hydrolysis pipe 90 through which the reducing agent flows is formed in front of the third damper 75 formed between the DOC 41 and the DPF 45. It has the same configuration as the bypass-integrated exhaust gas purifier reactor of Example 1.

The operating method of the bypass integrated exhaust gas purifier reactor of the present invention changes the directions of the first damper 71, the second damper 73, and the third damper 75 according to the bypass mode, the purification mode, and the ash removal mode. It operates to move the exhaust gas to the bypass flow path and the reaction flow path.

When switching to each bypass mode, purification mode, and ash removal mode during engine operation, the exhaust gas flow is blocked and the exhaust gas cannot be discharged to the outside of the purification device. Problems such as stopping and safety accidents may occur. Therefore, for the stable use of the bypass-integrated exhaust gas purifier reactor, the operation direction and sequence for sequential switching of the internal damper are important.

Table 1 below is a table showing whether the reaction flow path and the bypass flow path of the damper are open or closed according to the operating method of the bypass integrated exhaust gas purifier reactor, respectively.

driving condition first damper second damper third damper Bypass mode Close the reaction flow path Close the reaction flow path Closure purification mode Bypass Euro Closed Bypass Euro Open Closure Ash removal mode Bypass Euro Closed
or closing the reaction flow path Reaction flow closure Opening

In this specification, opening or closing the damper should be understood to mean that the damper operates to change the flow direction of the exhaust gas introduced into the exhaust gas purification device reactor through rotational motion to open or close the bypass flow path or the reaction flow path. do.

5 is a schematic diagram showing the operation of the damper and the flow of exhaust gas in the bypass-integrated exhaust gas purifier reactor according to Example 1 of the present invention in the bypass mode.

As shown in FIG. 5, when the bypass integrated exhaust gas purifier reactor 100 operates in the bypass mode, the reaction oil is closed by the first damper 71 and the second damper 73, and By driving the damper to open only the bypass flow path 30 , the exhaust gas introduced from the exhaust gas inlet 11 may be directly discharged through the exhaust gas outlet 13 through the bypass flow path 30 .

6A shows an operation method of switching the bypass integrated exhaust gas purification device reactor from the bypass mode to the purification mode, in which the second damper operates to open the bypass flow path (S11), by the first damper Closing the bypass flow path (S12), measuring the temperature of the catalyst filter of the reaction flow path to determine whether the measured catalyst filter temperature is equal to or higher than a set value (S13), and reacting when the catalyst filter temperature is determined to be higher than or equal to the set value It is possible to purify the exhaust gas introduced into the reaction passage by proceeding in the order of the step (S14) of injecting the reducing agent into the passage.

In the bypass integrated exhaust gas purifier reactor of the present invention, the catalytic filter whose temperature is measured to determine whether a reducing agent is injected is the sDPF (43) or the DPF (45).

6B is a flowchart illustrating an operation method for switching from the bypass mode to the ash removal mode.

When the bypass-integrated exhaust gas purifier reactor is switched from the bypass mode to the ash removal mode as shown in FIG. 6B , the first damper and the second damper maintain the reaction flow path in a closed state, and the third damper is opened The operation mode can be switched, including the step of driving the damper (S15) and removing the ash by operating the ash blower installed at the rear end of the sDPF or the rear end of the DPF and the front end of the SCR (S16).

7 is a schematic diagram showing the operation of the damper and the flow of exhaust gas in the bypass integrated exhaust gas purification device reactor of the present invention in the purification mode.

As shown in FIG. 7 , when the bypass-integrated exhaust gas purifier reactor operates in the purification mode, the bypass flow path is closed by the first damper 71 and then the second damper 73 is operated immediately to react By driving the damper to open the bypass flow path from the flow path, a reducing agent is injected into the reaction flow path 50, and the reaction flow path is removed from the exhaust gas inlet 11 using the DOC 41 and the sDPF 43 installed in the reaction flow path. (50) to purify the exhaust gas introduced.

FIG. 8a shows an operation method in which the bypass-integrated exhaust gas purifier reactor switches from the purification mode to the bypass mode, the step of stopping the injection of the reducing agent into the reaction passage (S21), the reaction passage by the first damper 71; The operation mode may be switched by driving the damper to open only the bypass flow path in the step (S22) of closing (S22) and the step (S23) of closing the reaction flow path by the second damper (73).

In step S21, after stopping the reducing agent injection, a purge of the reducing agent nozzle for injecting the reducing agent may be performed.

Figure 8b shows the operation method of the bypass integrated exhaust gas purifier reactor switching from the purification mode to the ash removal mode, the step of stopping the injection of the reducing agent into the reaction passage (S21), the reaction passage by the first damper After driving the damper in the step of closing (S22), the step of closing the reaction passage by the second damper (S23), and the step of opening the third damper (S24), and the rear end of the sDPF or the rear end of the DPF and the By operating the ash blower installed in front of the SCR, it can operate in the order of the step (S25) of removing the ash.

9 is a schematic view showing the operation of the damper and the flow of exhaust gas in the bypass integrated exhaust gas purifier reactor of the present invention in the case of the ash removal mode.

9, in the ash removal mode, the first damper 71 and the second damper 73 close the reaction passage and operate in the bypass mode to open only the bypass passage 30. After opening the third damper 75 during the operation, the ash blower installed at the rear end of the sDPF is operated, and the ash separated from the sDPF is discharged through the opened third damper 75 .

Figure 10a shows an operation method for switching from the ash removal mode to the purification mode.

As shown in FIG. 10A, stopping the operation of the ash blower installed at the rear end of the sDPF or the rear end of the DPF and the front end of the SCR (S31), the step of closing the third damper 75 (S32), the second damper ( 73) to open the bypass flow path from the reaction flow path (S33), closing the bypass flow path by the first damper 71 (S34), the catalyst filter measured by measuring the catalyst filter temperature The operation mode can be switched, including the step (S35) of determining whether the temperature is above the set value (S35) and the step (S36) of injecting a reducing agent into the reaction passage when the catalyst filter temperature is equal to or higher than the set value in the determining step (S35) .

Figure 10b shows an operation method for switching from the ash removal mode to the bypass mode. When the bypass integrated exhaust gas purifier reactor is switched from the ash removal mode to the bypass mode, the rear end of the sDPF or the rear end of the DPF and the SCR After stopping the operation of the ash blower installed in the front stage (S31) and closing the third damper 75 (S32), the reaction flow path is closed by the first damper 71 and the second damper 73 and the damper may be driven to open only the bypass flow path.

11: exhaust gas inlet
13: exhaust gas discharge part
21: first bulkhead
23: second bulkhead
30: Bypass Euro
41 : DOC
43: sDPF
45: DPF
47: SCR
50: reaction flow
60 : Ash Blower
71: first damper
73: second damper
75: third damper
90: hydrolysis pipe
100: Bypass integrated exhaust gas purification device reactor

Claims (14)

a diesel oxidation catalyst (DOC) installed in a reaction passage for purifying exhaust gas and a catalyst filter in which sDPF is installed at a rear end of the diesel oxidation catalyst (DOC);
a first damper installed at the rear end of the exhaust gas inlet to adjust opening and closing of the bypass flow path and the reaction flow path;
a second damper installed at the rear end of the reaction passage to control opening and closing of the reaction passage;
and a third damper for discharging ash from the reaction flow path to the outside;
When the bypass integrated reactor for the exhaust gas purification device operates in bypass mode,
The reaction passage is closed by the first damper and only the bypass passage is opened. In the reaction passage, when the catalyst filter temperature is higher than a set value, a reducing agent is injected to purify the exhaust gas flowing into the reaction passage. A method of operating a bypass-integrated exhaust gas purification device reactor. According to claim 1,
Among the bypass mode, when switching to the ash removal mode,
stopping the injection of the reducing agent;
opening the third damper; and
The method of operating a bypass-integrated exhaust gas purifier reactor comprising a; removing ash by operating an ash blower installed at the rear end of the sDPF. According to claim 1,
When switching from the bypass mode to the purification mode,
blocking the bypass flow path by operating the first damper;
opening the bypass passage from the reaction passage by operating the second damper;
In the reaction passage, when the catalyst filter temperature is greater than or equal to a set value, a reducing agent is injected to purify the exhaust gas flowing into the reaction passage. 4. The method of claim 3,
When switching back from the purge mode to the bypass mode,
stopping the injection of the reducing agent into the reaction passage; and
and operating the first damper and the second damper to open only the bypass passage. 4. The method of claim 3,
When switching from the purification mode to the ash removal mode,
stopping the injection of the reducing agent into the reaction passage;
operating the first damper and the second damper to open only the bypass flow path;
opening the third damper; and
The method of operating a bypass-integrated exhaust gas purifier reactor comprising a; removing ash by operating an ash blower installed at the rear end of the sDPF. 6. The method of claim 5,
When switching from the ash removal mode to the purification mode,
stopping the operation of the ash blower installed at the rear end of the catalyst filter;
closing the third damper;
opening the second damper in a bypass flow direction direction;
operating the first damper to block the bypass flow path and open the reaction flow path; and
and purifying the exhaust gas flowing into the reaction passage by injecting a reducing agent in the reaction passage when the catalyst filter temperature is higher than or equal to a set value. 6. The method of claim 5,
When switching from the ash removal mode to the bypass mode,
Stopping the operation of the ash blower installed at the rear end of the sDPF, and closing the third damper; Method of operating a bypass-integrated exhaust gas purifier reactor comprising: a. a catalyst filter in which a diesel oxidation catalyst (DOC) installed in a reaction passage for purifying exhaust gas, a DPF after the diesel oxidation catalyst (DOC), and an SCR are installed at a rear end of the DPF;
a first damper installed at the rear end of the exhaust gas inlet to adjust opening and closing of the bypass flow path and the reaction flow path;
a second damper installed at the rear end of the reaction passage to control opening and closing of the reaction passage;
and a third damper for discharging ash from the reaction flow path to the outside;
When the bypass integrated reactor for the exhaust gas purification device operates in bypass mode,
The reaction passage is closed by the first damper and only the bypass passage is opened. In the reaction passage, when the catalyst filter temperature is higher than a set value, a reducing agent is injected to purify the exhaust gas flowing into the reaction passage. A method of operating a bypass-integrated exhaust gas purification device reactor. 9. The method of claim 8,
Among the bypass mode, when switching to the ash removal mode,
stopping the injection of the reducing agent;
opening the third damper; and
and removing ash by operating an ash blower installed at the rear end of the DPF and the front end of the SCR. 9. The method of claim 8,
When switching from the bypass mode to the purification mode,
blocking the bypass flow path by operating the first damper;
opening the bypass passage from the reaction passage by operating the second damper; and
and purifying the exhaust gas flowing into the reaction passage by injecting a reducing agent in the reaction passage when the catalyst filter temperature is higher than or equal to a set value. 11. The method of claim 10,
When switching back from the purge mode to the bypass mode,
stopping the injection of the reducing agent into the reaction passage; and
and operating the first damper and the second damper to open only the bypass passage. 11. The method of claim 10,
When switching from the purification mode to the ash removal mode,
stopping the injection of the reducing agent into the reaction passage;
operating the first and second dampers to open only the bypass passage;
opening the third damper; and
and removing ash by operating an ash blower installed at the rear end of the DPF and the front end of the SCR. 13. The method of claim 12,
When switching from the ash removal mode to the purification mode,
stopping the operation of the ash blower installed at the rear end of the catalyst filter;
closing the third damper;
opening the second damper in a bypass flow direction direction;
operating the first damper to block the bypass flow path and open the reaction flow path; and
and purifying the exhaust gas flowing into the reaction passage by injecting a reducing agent in the reaction passage when the catalyst filter temperature is higher than or equal to a set value. 13. The method of claim 12,
When switching from the ash removal mode to the bypass mode,
The method of operating a bypass-integrated exhaust gas purifier reactor comprising: stopping the operation of the ash blower installed at the rear end of the DPF and the front end of the SCR, and closing the third damper.

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