KR101786755B1 - Gas cooler - Google Patents

Abstract

A gas cooler capable of downsizing and capable of stably removing dust while preventing leakage of exhaust gas to the outside is provided. A gas cooler 1 according to the present invention includes a plurality of cooling pipes 5 disposed in a cooling chamber 3, a dust removing member 7 slidably formed on a peripheral surface of the cooling pipe, And a reciprocating movement mechanism (9) for reciprocating the removing member in the axial direction of the cooling pipe. The reciprocating mechanism includes a support member (17) holding the dust removing member in a reciprocating manner and being directed in an intersecting direction with the axial direction of the cooling pipe, a support member (17) formed on the side wall (3a) A sealing mechanism (21) for preventing the gas in the cooling chamber from leaking to the outside, and a support member supported from the opening portion, A movable movable body 22, and a driving means 24 for reciprocating the movable body.

Description

Gas Cooler {GAS COOLER}

The present invention relates to a gas cooler for cooling an exhaust gas of a facility for manufacturing a high-density silicon steel strip by, for example, siliconization by CVD (Chemical Vapor Deposition) Cooling device) for cooling exhaust gas including dust.

Ferrous chloride (FeCl ₂ or less, referred to as iron chloride) is contained in the exhaust gas of a furnace facility for producing high silicon steel strips, and this material has physical properties of a boiling point of 1024 ° C and a melting point of 670 ° C.

When this exhaust gas is quenched to a temperature not higher than the melting point at the inner temperature of the furnace, iron chloride is produced as fine powder in the exhaust gas. When the exhaust gas is further cooled from this temperature to the gas cooler, iron chloride (dust) adheres to the heat transfer surface of the gas cooler. Therefore, a dust removing device is required for the gas cooler. Without the dust removing device, not only the cooling ability is lowered but also the exhaust gas flow path is blocked by the iron chloride attached to the heat transfer surface, so that the operation of the furnace can not be continued.

Therefore, it is desired that the gas cooler has a mechanism capable of simply removing dust attached to the cooling pipe portion constituting the heat transfer surface and preventing the growth of adhered matter by the dust in the cooling pipe portion do. For example, Patent Document 1 proposes a gas cooler having a mechanism for removing dust with a cooling pipe.

The gas cooler disclosed in Patent Document 1 is characterized in that the gas cooler disclosed in Patent Document 1 has a plurality of insertion holes through which a cooling pipe can be slidably inserted and inserted with sufficient clearance and to which cooling pipes (Refer to claim 1 of patent document 1) comprising a dust removing plate to be inserted and inserted by being inserted or leaned and a moving mechanism for moving the dust removing plate in the direction of the tube axis of the cooling pipe .

Patent Document 1 discloses a moving mechanism in which a distal end of a slide shaft inserted into a machine is connected to each of the dust removing plates through a seal made of gland packing and gas sealing bushing And slides the slide shaft in the longitudinal direction thereof, thereby sliding the respective dust removing plates in the axial direction of the cooling pipe. More specifically, it is possible to connect a plurality of slide shafts, which are outwardly extended, to a moving mechanism with a driving device (cylinder device) by a connecting plate, and connect a rod of a cylinder device as a driving device to the connecting plate .

Japanese Utility Model Utility Model Publication No. 5-27049

As disclosed in Patent Document 1, the dust removing plate has a large number of insertion holes on the entire surface, and a large number of cooling pipes are loosely passed through the insertion holes, .

The dust removing plate is disposed in the cooling chamber through which the gas passes. The driving mechanism for driving the dust removing plate is disposed outside the cooling chamber. Therefore, the driving mechanism inserts the sealed drive shaft into the cooling chamber from the outside so as to prevent the gas from leaking, supports the drive shaft and guides the drive shaft in the direction of the axial direction of the cooling pipe It is necessary to reciprocate the dust removing plate. That is, in such an apparatus, it is necessary to perform linear movement while maintaining sealability.

However, in the structure of Patent Document 1, in order to prevent warpage of the slide shaft and the drive shaft in that the slide shaft and the drive shaft reciprocate while receiving the load of the removal plate and the resistance of the dust, It needs to be high. Further, if the hermeticity of the sliding portion is increased in order to improve the sealing effect, the sliding resistance is increased correspondingly, so that it is necessary to increase the driving force.

For this reason, in the driving mechanism for driving the conventional dust removing plate, there is a problem that the whole apparatus has been enlarged in order to realize stable driving.

Therefore, it has been desired to develop a gas cooler capable of downsizing, and achieving both sealing and stable driving.

The above-described problems are not limited to the gas cooler formed in the exhaust gas processing line of the CVD processing facility for producing high silicon steel sheets, but may be a gas cooler formed of a plurality of straight cooling pipes arranged in parallel in a cooling chamber (A pipe group), and is a common problem in a gas cooler having a function of removing dust attached to these tube groups.

SUMMARY OF THE INVENTION The present invention has been made in order to solve these problems, and it is an object of the present invention to provide a gas cooler capable of reducing the size and weight of a dust removing device and stably removing dust adhered to a cooling pipe while preventing leakage of exhaust gas to the outside The purpose is to do.

(1) According to the present invention, there is provided a gas cooler comprising: a water-cooled tube group disposed in a cooling chamber in which a gas flows; a dust removing member configured to reciprocate on peripheral surfaces of each cooling pipe in a water- And a reciprocating mechanism for reciprocating the dust removing member in the axial direction of the cooling pipe,

The reciprocating mechanism includes:

A support member for holding the dust removing member in a reciprocating manner in the axial direction of the cooling pipe and extending in a direction crossing the axial direction of the cooling pipe;

An opening that is formed in a side wall of the cooling chamber and enables the support member to be drawn from the cooling chamber side and reciprocate in the axial direction of the cooling pipe;

A sealing mechanism which is formed in the opening and prevents the gas in the cooling chamber from leaking to the outside,

A movable body which is formed outside the cooling chamber and which supports the support member and is reciprocated in a direction parallel to the axial direction of the cooling pipe,

And driving means for reciprocating the moving body in a direction parallel to the axial direction of the cooling pipe.

(2) In the above-mentioned (1), it is preferable that a small chamber having peripheral walls surrounding the opening and forming a closed space is provided in the outer side of the cooling chamber, The inert gas for maintaining the inert gas is filled,

And the moving body is formed in the small room.

(3) In the above-mentioned (1) or (2), the sealing mechanism may include: a sealing plate formed on the supporting member and covering the opening from the inside of the cooling chamber; And elastic pressing means for pressing at all times.

(4) The vehicle according to any one of (1) to (3), wherein the moving body is a traveling car having wheels.

(5) It is preferable that, in any one of (1) to (4), the driving means includes a ball screw and a motor for rotating the ball screw, As shown in Fig.

In the present invention, the reciprocating mechanism for reciprocating the dust removing member in the axial direction of the cooling pipe is disposed so as to support the dust removing member so as to reciprocate in the axial direction of the cooling pipe, An opening portion formed in a side wall of the cooling chamber and enabling the support member to be directed from the cooling chamber side and reciprocating in the axial direction of the cooling pipe; A sealing mechanism for preventing the gas in the cooling chamber from leaking to the outside, and a supporting mechanism for supporting the supporting member formed outside the cooling chamber and extending in the direction parallel to the axial direction of the cooling pipe A movable body movable in a reciprocating manner, a movable body movable in the axial direction of the cooling pipe To be because a structure formed by a driving means for reciprocating motion, and the whole apparatus can be downsized, and the dust is reliably removed while preventing the leakage of the exhaust gas to the outside can be realized.

When the stable removal of dust is enabled, the allowance for the heat transfer area expected to be lowered due to contamination on the heat transfer surface can be reduced, and the entire cooling device can be made compact.

1 is an explanatory view for explaining a main part of a gas cooler according to an embodiment of the present invention.

(Mode for carrying out the invention)

The gas cooler 1 according to the present embodiment will be described with reference to Fig.

1, the gas cooler 1 of the present embodiment includes a plurality of cooling pipes 5 arranged in parallel in a cooling chamber 3 through which gas flows, And a reciprocating mechanism 9 for reciprocally moving the dust removing member 7 in the axial direction of the cooling pipe 5. The dust removing member 7 includes a dust removing member 7,

Hereinafter, each configuration will be described in detail.

<Cooling room>

The cooling chamber 3 is a chamber through which the exhaust gas flows, and the exhaust gas flows in a direction orthogonal to the cooling pipe 5 (upward, downward, or downward) as indicated by an arrow in FIG.

The side wall 3a of the cooling chamber 3 is a door structure and can be opened and closed as indicated by arrows in the drawing. By opening and closing the side wall 3a, it is easy to perform maintenance such as replacement of the dust removing member 7 and internal inspection.

<Cooling Pipe>

A plurality of cooling pipes (5) are arranged in parallel in the cooling chamber (3) to form a cooling water pipe group. A plurality of cooling water pipe groups are formed. Cooling water flows through the inside of the cooling pipe 5 so that the exhaust gas comes into contact with the main surface of the cooling pipe 5 to cool the exhaust gas.

&Lt; Dust removal member &

The dust removing member 7 is slidably formed on the main surface of the cooling pipe 5.

As shown in Fig. 1, the dust removing member 7 is made of an L-shaped angle member in cross section. A plurality of U-shaped cutout portions 7a are formed on one surface of the dust removing member 7 constituting the L-shaped portion. The other side constituting the L character is the upper side transverse face 7b. The side on which the notched portion 7a is formed is in the longitudinal direction and the upper side transverse face 7b is arranged in the transverse direction above the face on which the notch 7a is formed. In the notched portion 7a, the cooling pipe 5 is inserted so as to be abutted or brought close thereto.

The dust removing member 7 is formed in correspondence with the entirety of the cooling pipe 5 at the lower end from the upper end, and is formed in plural in the axial direction of the cooling pipe 5 with a predetermined gap therebetween. The reciprocating range of the dust removing member 7 is configured so as to extend over the entire length of the cooling pipe 5 so that the dust adhering portion of the cooling pipe 5 can be slid.

The shape of the dust removing member 7 is not particularly limited, and it may be a member having a semicircular notch, sandwiching the cooling pipe 5 from above and below, or a simple rod shape.

When the dust removing member 7 is formed of an L-shaped angle member as shown in Fig. 1, the upper side transverse face 7b of the angle member disposed at the lower end is located at the upper end of the cooling pipe 5 at the upper end So that it is possible to remove the dust on the lower surface side of the cooling pipe.

&Lt;

The reciprocating mechanism 9 drives the dust removing member 7 to reciprocate in the axial direction of the cooling pipe 5. The reciprocating mechanism 9 includes a support member 17 for supporting the dust removing member 7, an opening 19 formed in a side wall of the cooling chamber 3 and into which the supporting member 17 is inserted, A movable body 22 that supports the supporting member 17 and reciprocates in a direction parallel to the axial direction of the cooling pipe 5, And a driving means (24).

In the present embodiment, a small chamber 23 having a peripheral wall 23a surrounding the opening 19 and forming a closed space is formed in the outside of the cooling chamber 3, and the small chamber 23 The main components of the reciprocating mechanism 9 are accommodated. 1, the small chamber 23 is shown only on one side of the cooling chamber 3, but the small chamber 23 is also formed on the opposite side of the cooling chamber 3, The main configuration of the mechanism 9 is accommodated.

The small chamber 23 is filled with nitrogen gas or the like so that nitrogen gas or the like is purged to increase the internal pressure of the chamber 23 which is smaller than the internal pressure of the cooling chamber 3, Thereby preventing the exhaust gas from leaking to the small room 23 more reliably.

Hereinafter, each configuration of the reciprocating mechanism 9 will be described in detail.

&Quot; Support member &quot;

The support member 17 supports the dust removing member 7 in the axial direction of the cooling pipe 5 so as to be reciprocally movable and is directed in the direction perpendicular to the axial direction of the cooling pipe 5, Is protruded outward from the side wall 3a of the cooling chamber 3. As shown in Fig.

The support member 17 of the present embodiment is directed in the direction perpendicular to the axial direction of the cooling pipe 5 but is not necessarily perpendicular to the axial direction of the cooling pipe 5, So that the end portion protrudes from the side wall 3a of the cooling chamber 3. [

As shown in Fig. 1, the support member 17 is formed of a plate-shaped body having a predetermined width in the axial direction of the cooling pipe 5, and the rigidity of the cooling pipe 5 in the axial direction is increased. Therefore, even when the dust removing member 7 receives stress due to the sliding resistance when sliding the main surface of the cooling pipe 5, it is hard to bend.

"Opening"

The opening 19 is formed in the side wall 3a of the cooling chamber 3 and formed into a long hole extending in the axial direction of the cooling pipe 5. [ The width of the opening 19 is set to a width at which the support member 17 can be inserted and the length of the opening 19 is set to be about the same as the reciprocating range of the support member 17. [

"Sealing mechanism"

The sealing mechanism 21 includes a sealing plate 25 which is attached to the supporting member 17 and covers the opening 19 from the inside of the cooling chamber 3 and an elastic support member 25 which constantly pressurizes the sealing plate 25 toward the opening side .

The sealing surface 25a on the side of the opening 19 of the cooling chamber 3 in the sealing plate 25 is made of Teflon (registered trademark) and has corrosion resistance, So that smooth movement is possible.

A reaction force receiving plate 26 is attached to the cooling chamber 3 side of the sealing plate 25 of the support member 17 via a predetermined gap with the sealing plate 25 And the reaction plate 26 is provided with a spring device 28 as an elastic supporting means for constantly pressing the seal plate 25 toward the opening 19 side.

Since the opening 19 is covered by the sealing plate 25 from the side of the cooling chamber 3 and the sealing plate 25 is moved together with the supporting member 17 in a state in which the sealing plate 25 is pressed toward the opening 19, 19 are always shut off, and the exhaust gas is prevented from leaking from the cooling chamber 3.

As described later, since the support member 17 is supported by the moving body 22, the load of the dust removing member 7 does not act on the seal mechanism 21. [

"Mobile"

The movable body 22 supports the end portion of the support member 17 formed in the small chamber 23 outside the cooling chamber 3 and directed from the opening 19, And can reciprocate in a parallel direction.

The movable member 22 supports the support member 17 by supporting the support member 17 and its load is supported by the wheel 29 formed at the lower portion of the movable member 22. [

As described above, since the support member 17 is supported by the moving body 22 and the moving body is reciprocated, the driving required for the reciprocating motion of the support member 17 is controlled by the rotation of the ball screw 33, It is possible to reduce the driving torque because it is carried out by the sleeve 40 (screw sleeve), and the entire driving device can be downsized.

Particularly, the moving body 22 according to the present embodiment is provided with a wheel 29 having a wheel 29 running on a rail 27 formed so as to extend in a direction parallel to the axial direction of the cooling pipe 5 in the small chamber 23 The traveling of the moving body 22 can be smoothly performed and the reciprocating movement of the dust removing member 7 can be realized with a very small driving force.

The moving body 22 of the present invention is not limited to having a wheel, but may be of another embodiment as long as it can move smoothly in a direction parallel to the axial direction of the cooling pipe. For example, It may be the same.

&Quot; Driving means &

The driving means 24 reciprocates the moving body 22 in the direction parallel to the axial direction of the cooling pipe 5 and is connected to the motor 35 and the rotational shaft 37 of the motor 35 via a coupling 39 And a screw sleeve 40 formed on the moving body 22 and threadedly engaged with the ball screw 33. The ball screw 33 is fixed by a motor 35 to the ball screw 33, So that the moving body 22 is reciprocated along the axis of the ball screw 33.

1, the motor 35 is provided outside the small chamber 23, and the shaft portion of the ball screw 33 penetrates from the outside of the small chamber 23 to the inside thereof. In addition, since the servomotor is employed as the motor, the movement accuracy can be ensured and the program operation can be performed.

As described above, since nitrogen gas or the like is purged in the small chamber 23, sealing must be performed so that nitrogen gas or the like does not leak from the portion through which the shaft portion of the ball screw 33 penetrates. However, 33 can be easily and securely sealed as compared with the seal of the shaft portion which is reciprocatingly turned by the rotation shaft.

The operation of the gas cooler 1 of the present embodiment configured as described above will be described.

The exhaust gas including the dust flows in the cooling chamber 3 so as to intersect with the axial direction of the cooling pipe 5 and the exhaust gas is cooled by touching the surface of the cooling pipe 5.

The dust removing member 7 is moved by the reciprocating movement mechanism 9 to the cooling pipe 5 by driving the driving means 24 because the dust is attached to the surface of the cooling pipe 5 when the gas cooler 1 is operated, 5) reciprocating in the tube axis direction (horizontal direction).

The dust attached to the surface of the cooling pipe 5 is removed by the reciprocating movement of the dust removing member 7 because each cooling pipe 5 is in contact with or close to the dust removing member 7. The removed dust falls to the dust receptacle (not shown) under the cooler and is discharged to the outside when a proper amount of dust is collected.

As described above, according to the present embodiment, the dust removing member 7 is supported by the support member 17, the support member 17 is supported by the moving body 22, and the ball screw 33 and the screw sleeve Since the rotation of the ball screw 33 is converted into the reciprocating motion of the cooling pipe 5 in the axial direction by the moving unit composed of the moving unit 40, It is possible structure.

The opening 19 formed in the side wall 3a of the cooling chamber 3 is sealed by the sealing mechanism 21 and the opening 19 is surrounded by the small chamber 23, The exhaust gas does not leach to the outside because the purge gas such as nitrogen gas is filled in the exhaust gas.

As described above, the gas cooler of the present embodiment ensures both the smooth driving of the dust removing member 7 and the sealing of the exhaust gas.

1: Gas Cooler
3: Cooling room
3a: side wall
5: cooling pipe
7: Dust removal member
7a:
7b: Upper horizontal surface
9:
17: Support member
19: opening
21: seal mechanism
22: Moving object
23: Small room
23a: peripheral wall
24: Driving means
25: seal plate
25a: seal face
26: Reaction plate
27: Rail
28: Spring device
29: Wheel
33: Ball Screw
35: Motor
37:
39: Coupling
40: screw sleeve

Claims (6)

A dust removing member formed to be capable of reciprocating on the peripheral surface of each of the cooling pipes of the water-cooled tubing group; and a dust removing member disposed in the cooling pipe, A reciprocating mechanism for reciprocating in the axial direction,
The reciprocating mechanism includes:
A support member which holds the dust removing member in a reciprocating manner in an axial direction of the cooling pipe and which is directed in an intersecting direction with the axial direction of the cooling pipe;
An opening that is formed in a side wall of the cooling chamber and enables the support member to be drawn from the cooling chamber side and reciprocate in the axial direction of the cooling pipe;
A sealing mechanism which is formed in the opening and prevents the gas in the cooling chamber from leaking to the outside,
A movable body which is formed outside the cooling chamber and which supports the support member and is reciprocated in a direction parallel to the axial direction of the cooling pipe,
And driving means for reciprocating the moving body in a direction parallel to the axial direction of the cooling pipe,
Wherein the sealing mechanism includes a sealing plate formed on the supporting member and covering the opening from the inside of the cooling chamber and an elastic supporting means for pressing the sealing plate to the opening side at all times. The method according to claim 1,
Wherein a small chamber having a peripheral wall surrounding the opening and having a closed space is provided on the outer side of the cooling chamber and the small chamber is filled with an inert gas for maintaining the inside thereof at or above the internal pressure of the cooling chamber,
And the moving body is formed in the small room. delete 3. The method according to claim 1 or 2,
Wherein the moving body is a traveling vehicle having wheels. 3. The method according to claim 1 or 2,
Wherein the driving means includes a ball screw and a motor for rotating the ball screw, and is configured to reciprocate the moving body by rotating the ball screw. 5. The method of claim 4,
Wherein the driving means includes a ball screw and a motor for rotating the ball screw, and is configured to reciprocate the moving body by rotating the ball screw.

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