KR200471469Y1 - Flow guide and scr apparatus the same - Google Patents

Abstract

Embodiment of the present invention relates to a selective catalytic reduction device, in the selective catalytic reduction device for purifying the exhaust gas of the engine according to an embodiment of the present invention, connected to the exhaust duct, exhaust duct into which the exhaust gas of the engine is introduced The reactor, a catalyst located inside the reactor, the reactor is connected to the exhaust duct and includes a plurality of flow path guides capable of angle adjustment.

Description

Selective catalytic reduction device including a flow guide {FLOW GUIDE AND SCR APPARATUS THE SAME}

 Embodiment of the present invention relates to a selective catalytic reduction device, and more particularly to a selective catalytic reduction device comprising a flow path guide.

An apparatus for selectively removing NOx by using a catalyst as a reducing agent injection among exhaust purification apparatuses for purifying exhaust gas emitted from an engine is called a selective catalytic reduction (SCR) apparatus. As a reducing agent, ammonia, urea, etc. can be used, and the reducing agent injected by hydrolysis or direct injection and NOx contained in the exhaust gas are decomposed into nitrogen (N₂) and water (H₂O) and purified by a chemical reaction by a catalyst. Allow exhaust gas to be discharged to the outside. A reducing agent mixed with the exhaust gas causes a chemical reaction by a catalyst located in the SCR reactor, and the catalyst has a flow path formed in a form in which an active ingredient is supported on a support. The flow path may be configured in various forms such as honeycomb, lattice structure, etc., and the exhaust gas passes through the catalyst flow path thus formed, causing chemical reaction with the catalyst. In the exhaust purification apparatus using SCR, uniform contact between the exhaust gas and the catalyst in the reactor has a great influence on the exhaust gas purification efficiency and catalyst life using the SCR.

 Meanwhile, when the manufactured SCR reactor is installed, non-uniform flow may occur inside the SCR reactor depending on the limitation of installation space or the type of pipe of the exhaust duct connected to the reactor, and the non-uniform flow reduces the exhaust gas purification efficiency and the catalyst replacement cycle. There is a problem that is shortened. In addition, the catalyst located inside the SCR reactor is expensive and expensive to replace.

Republic of Korea Patent Publication No. 10-2012-0052604 (2012.5.24) Republic of Korea Patent Publication No. 10-2001-0024104 (2001.3.26)

 The present invention provides flow path guides each of which is angle-variable with a plurality of flow path guides crossing each other inside the SCR reactor.

According to an embodiment of the present invention, in a selective catalytic reduction (SCR) for purifying exhaust gas of an engine, an exhaust duct into which the exhaust gas of the engine is introduced, a reactor connected to the exhaust duct, and inside the reactor It includes a catalyst, and a plurality of flow path guide is located at the front end of the reactor connected to the exhaust duct is adjustable angle.

The flow path guide includes a plurality of first flow path guides, a plurality of second flow path guides arranged in a direction crossing the plurality of first flow path guides, a first flow path guide shaft formed on the first flow path guide, and the second flow path guide. It may include a drive unit for driving the second flow path guide shaft, the first flow path guide shaft and the second flow path guide shaft respectively formed in the.

The driving unit includes a first gear formed at one side of each of the first flow path guide shaft and the second flow path guide shaft, a second gear meshed with the first gear inside the reactor, and a third gear meshed with the second gear. A gear may be coupled to the third gear to control an angle of the first and second flow path guides.

The driving unit is engaged with the second gear and the second gear that are engaged with the plurality of first gears respectively formed on one side of the first flow guide guide shaft and the second flow guide shaft, the plurality of first gears inside the reactor. And a third gear, and an operation unit coupled to the third gear to adjust angles of the first and second flow path guides.

The second gear may be formed as a rack capable of adjusting the angles of the first and second flow path guides by simultaneously rotating the plurality of first gears by the third gear.

The operation unit may further include a display unit indicating rotation angles of the first and second flow path guides.

   The present invention improves the flow uniformity inside the reactor by changing the angle of each of the plurality of flow guides that cross each other inside the SCR reactor.

1 is a schematic view according to an embodiment of the present invention.
FIG. 2 is a front view of the flow path guide located at the front end of the reactor of FIG. 1.
3 is an enlarged perspective view of FIG. 2A.
4 is a plan view of the driving unit of FIG. 1.
5 is a plan view of a driving unit according to an embodiment of the present invention.
6 is a perspective view of an operation unit of FIGS. 4 and 5.

Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings so that those skilled in the art can easily carry out the present invention. The present invention may be embodied in many different forms and is not limited to the embodiments described herein.

The drawings are schematic and illustrate that they are not drawn to scale. The relative dimensions and ratios of the parts in the figures are shown exaggerated or reduced in size for clarity and convenience in the figures, and any dimensions are merely illustrative and not restrictive. And to the same structure, element or component appearing in more than one drawing, the same reference numerals are used to denote similar features.

The embodiments of the present invention specifically illustrate ideal embodiments of the present invention. As a result, various modifications of the illustrations are expected. Thus, the embodiment is not limited to any particular form of the depicted area, but includes modifications of the form, for example, by manufacture.

Hereinafter, the flow path guide 400 inside the reactor 200 according to an embodiment of the present invention will be described with reference to FIGS. 1 to 4.

1 is a schematic view according to an embodiment of the invention.

As shown in FIG. 1, the exhaust gas generated by the operation of the engine flows into the exhaust duct 101, and the reducing agent is injected by the reducing agent injection unit 100 in the exhaust duct 101 and mixed with the exhaust gas. The catalyst 300 is located inside the reactor 200. The exhaust gas mixed with the reducing agent flows into the reactor 200, where the flow path guide 400 is located at the front end of the reactor 210 through which the exhaust gas flows into the reactor 200.

As illustrated in FIGS. 2 and 3, the flow path guide 400 is positioned at the front end of the reactor 210, and a plurality of first flow path guides 410 and second flow path guides 420 are formed at predetermined intervals, respectively. Each first flow guide 410 is formed with a first flow guide shaft 413, and the second flow guide 420 has a second flow guide shaft 423.

Each of the first flow path guide shaft 413 and the second flow path guide shaft 423 includes a driver 430 that can change an angle. One side and the other side of each of the first and second flow path guides 410 and 420 are tapered according to the tapered shape of the reactor front end 210 for smoothly introducing exhaust gas into the reactor 200. The grooves 411 and 421 are formed so that the 410 and the second flow path guide 420 cross each other and are rotatably coupled, and do not interfere when the first and second flow path guides 410 and 420 are rotated. The intervals of the grooves 411 and 421 formed in the first and second flow path guides 410 and 420 may be changed according to the thickness and the number of the first and second flow path guides 410 and 420.

As shown in FIG. 4, the driving unit 430 includes a first gear 431 coupled to the first flow guide shaft 413, a second gear 432 engaged with the first gear 431, and a second gear ( And a third gear 433 engaged with the 432, and the third gear 433 includes an operation unit 434 that can change an angle of the first flow guide 410. The operation unit 434 may further include a display unit 435 indicating the rotation angle of the first flow path guide 410.

 The shaft 413 of each first flow guide is coupled to the first gear 431 on one side and the first flow guide 410 located on the other end of the reactor front end 210. The second flow path guide shaft 423 also includes a driving unit 430 including the first gear 431, the second gear 432, the third gear 433, and the operation unit 434 in the same structure as described above.

When the SCR reactor 200 is installed inclined due to the limitation of the installation space or when the angle of the flow path guide 400 is required to improve the uniformity of the flow in the reactor 200, for example, when the connection shape of the exhaust duct 101 is changed, the outside of the reactor When the operation unit 434 that requires an angle change is selected and rotated, the second gear 432 located inside the reactor 200 is engaged with the rotation of the third gear 433 coupled with the operation unit 434, thereby engaging the first gear 431. ), The first and second flow path guides 410 and 420 rotate to change the angle, and the rotation angle of the lever 434 may be known by the display unit 435.

Hereinafter, the flow path guide 400 inside the reactor 200 according to an embodiment of the present invention will be described with reference to FIGS. 1 to 5.

As shown in FIG. 5, the driving unit 530 may include a plurality of first gears 531 formed on one side of the shaft 413 of each first flow path guide, and a plurality of first gears 531 inside the reactor. An operation unit for adjusting the angles of the first gear guides 410 coupled to the second gear 532, the third gear 533, and the third gear 533 engaged with the second gear 532. 434). The second gear 532 may be formed as a rack capable of adjusting the angle of the first flow guide 410 by simultaneously rotating the plurality of first gears 531 by the third gear 533. have. The second flow path guide shaft 423 also includes a driving unit 530 including the same first gear 531, the second gear 532, the third gear 533, and the operation unit 434.

When the operation unit 434 is rotated, the second gear having teeth formed on both surfaces of the first gear 531 and the third gear 533 may be engaged by the rotation of the third gear 533 coupled with the operation unit 434. The plurality of first gears 531 meshed with the second gear 532 by the rack 532 rotates to simultaneously angle the plurality of first flow path guides 410 or the second flow path guide 420. I can regulate it. The driving unit 530 may simultaneously adjust the angle of the plurality of first flow path guides 410 or the second flow path guides 420 positioned in the reactor front end 210 in a group.

Hereinafter, the operation unit 434 will be described with reference to FIG. 6.

Although the form of the operation part 434 shown in FIG. 6 shows a lever type, it is changeable on a case-by-case basis and includes all things which can apply rotational force without limiting a shape. The operation unit 434 may further include a display unit 435 included in the driving unit 430 or the driving unit 530 and indicating rotation angles of the first and second flow path guides 410 and 420, respectively. The display unit 435 may read the scales, diagrams, or letters, etc., pre-marked from the marks such as arrows of the operation unit 434 so that the operator may know the rotation angles of the first and second flow path guides 410 and 420.

When the exhaust gas is non-uniformly flown in the SCR reactor 200, clogging occurs in the expensive catalyst 300 located inside the reactor 200 or unreacted with a reducing agent, resulting in a decrease in catalyst efficiency. This heterogeneous flow eventually shortens catalyst 300 life and thus shortens the catalyst 300 exchange cycle.

According to the present invention, a plurality of first and second flow path guides 410 and 420 are formed so that a separate guide channel is not required, and each of the first and second flow path guides 410 and 420 is angle-changeable, and the front end portion 210 of the SCR reactor is provided. It is formed in the catalyst 300 can effectively guide the flow of the exhaust gas mixed with the reducing agent injected from the reducing agent injection unit 100.

In addition, since the flow guide 400 is located in the SCR reactor, it is possible to eliminate the non-uniform flow that may occur when the catalyst 300 inside the reactor 200 is replaced, and the angle can be changed without a complicated driving device. When installing and repairing the SCR reactor 200 for purifying exhaust gas of a large diesel engine such as a ship, a plant, a boiler, and the like, the SCR device may be installed by changing the flow guide 400 to an optimized angle.

Although the embodiments of the present invention have been described with reference to the accompanying drawings, those skilled in the art will appreciate that the present invention can be embodied in other specific forms without departing from the spirit or essential characteristics thereof will be. Therefore, the above-described embodiments are to be understood as illustrative and not restrictive in all respects, and the scope of the present invention is indicated by the above-mentioned utility model registration claims, which are described below. And it should be construed that all changes or modified forms derived from the equivalent concept are included in the scope of the present invention.

100: reducing agent injection unit 101: exhaust duct
200: reactor 210: reactor front end
300: catalyst 400: euro guide
410: first euro guide 420: second euro guide
411: First euro guide groove 421: Second euro guide groove
412: First euro guide portion 422: Second euro guide portion
413: First flow guide shaft 423: Second flow guide shaft
430: drive unit 431: first gear
432: second gear 433: third gear
434: operation unit 435: display unit
530: drive unit 531: first gear
532: second gear 533: third gear

Claims (6)

In the selective catalytic reduction device for purifying the exhaust gas of the engine,
An exhaust duct 101 into which the exhaust gas of the engine flows;
A reactor 200 connected to the exhaust duct 101;
A catalyst 300 located inside the reactor 200; And
It includes a plurality of flow path guide 400 which is located in the front end of the reactor 210 connected to the exhaust duct 101, the angle can be adjusted,
The flow guide 400,
A plurality of first flow guides 410;
A plurality of second flow path guides 420 arranged in a direction crossing the plurality of first flow path guides 410;
A first flow guide shaft 413 formed on the first flow guide 410;
A second flow guide guide shaft 423 formed on the second flow guide; And
Driving units 430 and 530 capable of driving the first flow path guide shaft 413 and the second flow path guide shaft 423, respectively.
Selective catalytic reduction device comprising a flow guide including a. delete In claim 1,
The drive unit 430,
A first gear 431 formed on one side of each of the first flow path guide shaft 413 and the second flow path guide shaft 423;
A second gear 432 engaged with the first gear 431 in the reactor 200;
A third gear 433 engaged with the second gear 432; And
An operation unit 434 coupled to the third gear 433 to adjust angles of the first and second flow path guides 410 and 420.
Selective catalytic reduction device comprising a flow guide including a. In claim 1,
The drive unit 530,
A plurality of first gears 531 formed on one side of the first flow guide shaft 413 and the second flow guide shaft 423, respectively;
A second gear 532 meshed with the plurality of first gears 531 in the reactor 200;
A third gear 533 engaged with the second gear 532; And
An operation unit 434 coupled to the third gear 533 to adjust angles of the first and second flow path guides 410 and 420.
Selective catalytic reduction device comprising a flow guide including a. 5. The method of claim 4,
The second gear 532 is formed of a rack capable of adjusting the angles of the first and second flow path guides 410 and 420 by simultaneously rotating the plurality of first gears 531 by the third gear 533. Selective catalytic reduction device comprising a flow guide. 5. The selective catalytic reduction device of claim 3, wherein the operation unit (434) further includes a flow path guide (435) indicating a rotation angle of the first and second flow path guides (410, 420). 6.

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