KR102497184B1 - Insulation structure of pyrolysis heater - Google Patents

Abstract

The present invention relates to a thermal insulation structure of a pyrolysis heater capable of minimizing the release of heat inside a pyrolysis heater, which is an essential facility in a naphtha cracking process for producing ethylene and propylene, which are basic petrochemical raw materials, to the outside.
The insulation structure of the pyrolysis heater of the present invention
A wall surface (10), an insulation board (11) installed on the wall surface to a predetermined thickness, fireproof insulation bricks (40) laminated on the surface of the insulation board, and installed along the wall surface at intervals of a predetermined height to obtain the fire resistance Equipped with a horizontal plate 100 that supports the load of the insulating brick;
The horizontal plate 100 is composed of a vertical part 110 attached to a wall surface and a horizontal support part 120 protruding from the vertical part toward the inside of the wall surface to support the refractory insulation bricks;
A heat conduction blocking part 130 is formed on the horizontal support part to block the heat transfer path to the vertical part 110 .

Description

Insulation structure of pyrolysis heater {Insulation structure of pyrolysis heater}

The present invention relates to a thermal insulation structure of a pyrolysis heater capable of minimizing the release of heat inside a pyrolysis heater, which is an essential facility in a naphtha cracking process for producing ethylene and propylene, which are basic petrochemical raw materials, to the outside.

In general, types of petrochemical plants include Atmospheric Distillation Unit, Vacuum Distillation Unit, Hydrodesulfurization Unit (HDS Unit), Hydrotreating & Cracking Unit, Visbreaking and Delayed Coking Unit (Visbreaking & Delayed Coking Unit), Aromatic Unit, Dehydrogenation Unit, Ethylbenzene/Styrene Monomer Unit (EB/SM Unit), Naphtha Cracking Unit (NCC Unit), PTA In addition to the PTA & PA Unit and Hydrogen & Ammonia Unit, there are facilities related to gas treatment and LNG.

Of these, the naphtha cracking process largely consists of a process of cracking naphtha and a process of separating ethylene and propylene gases obtained by cracking.

In addition, in order to perform the pyrolysis process, it is essential to have a pyrolysis heater capable of heating up to about 1100 ° C. so that the carbon link of naphtha can be cracked.

1 is a cross-sectional view showing the insulation structure of a conventional pyrolysis heater. As shown, such a pyrolysis heater is finished with a fireproof insulation interior material 20 having excellent performance because it is operated at a high temperature. The fireproof insulation interior material 20 is installed on the wall surface 10 of the pyrolysis heater in different materials and shapes by dividing a part directly affected by the flame of the burner installed at the bottom and a part affected indirectly by the flame of the burner installed at the bottom.

That is, a fireproof insulation interior material 20a made of fireproof insulation bricks is installed on the wall surface 10 that is directly affected by the flame of the burner, and chromia is added to alumina fibers and silica fibers on the wall surface 10 that is indirectly affected by A fireproof insulation interior material 20b made of a blanket made in the form of a cotton or blanket or a standardized module is constructed.

Among these fire-resistant and heat-insulating interior materials 20, the fire-resistant and heat-insulating interior materials 20a made of fire-resistant and heat-insulating bricks include an insulation board installed on the wall surface 10 of the pyrolysis heater to a certain thickness, and a fire-resistant insulation brick laminated on the surface of the insulation board. consists of

However, since the fire-resistant and heat-insulating interior material 20a made of the fire-resistant and heat-insulating bricks as described above has a significant load, when used for a long period of time, when deformation or cracks occur in the fire-resistant heat-insulating bricks due to the heat inside the pyrolysis heater, the laminated fire-resistant There is a high possibility of an accident in which the insulation brick collapses.

FIG. 2 is a cross-sectional view showing a heat insulating structure of a conventional pyrolysis heater having a horizontal plate. As shown, in order to prevent such an accident, recently, a horizontal plate 30 has been installed along the inner circumferential surface of the wall surface 10. are installed at regular height intervals so that the horizontal plates 30 can support the load of the fireproof insulating bricks 40, but as the heat inside the pyrolysis heater is released to the inner wall 10 through the horizontal plates 30 As the thermal efficiency of the pyrolysis heater decreases, as well as the temperature inside the pyrolysis heater decreases, there is a problem that high-purity pyrolysis products cannot be produced, and countermeasures are urgently needed.

Korean Patent Registration No. 10-1562353

The present invention has been made to solve the above problems, and an object of the present invention is to provide a thermal insulation structure of a pyrolysis heater capable of minimizing the release of heat inside the pyrolysis heater to the inner wall via horizontal plates along the inner circumferential surface of the wall. there is.

In order to achieve the above object, the heat insulation structure of the pyrolysis heater of the present invention includes a wall surface, an insulation board installed on the wall surface to a certain thickness, fireproof insulation bricks laminated on the surface of the insulation board, and a constant thickness along the wall surface. having horizontal plates installed at height intervals to support the load of the refractory heat insulating bricks; The horizontal plate is composed of a vertical portion attached to the wall surface and a horizontal support portion protruding from the vertical portion toward the inside of the wall surface to support the refractory insulation bricks; A heat conduction blocking part is formed on the horizontal support part to block a heat transfer path to the vertical part.

In addition, the heat conduction blocking part may be a through hole formed in the horizontal support part.

In addition, the heat conduction blocking portion may be a groove portion formed in the horizontal support portion, and the groove portion may be formed at an end portion in close contact with the vertical portion.

In addition, the entire section of the horizontal plate may be wrapped with fireproof insulation paper.

Meanwhile, the refractory insulating bricks positioned at the upper end of the horizontal support portion of the horizontal plate and the refractory insulating bricks positioned at the lower end of the horizontal support portion have corresponding concavo-convex coupling surfaces, and the horizontal support portion may be positioned between the concavo-convex coupling surfaces.

In this case, it is preferable to fill gaps between the concavo-convex coupling surfaces with a fireproof insulation interior material that blocks heat transfer to the horizontal support.

In addition, the horizontal plate may further include a reinforcing support installed between the vertical portion and the horizontal support portion to prevent sagging of the vertical portion.

In this case, it is preferable to install the reinforcing support at a position crossing the heat conduction blocking part.

In the heat insulation structure of the pyrolysis heater of the present invention configured as described above, since the horizontal plate installed in the pyrolysis heater has a heat conduction blocker that blocks the heat transfer path, the heat inside the pyrolysis heater is radiated to the outside through the horizontal plate roll. Heat loss It is possible to minimize, and as a result, it is possible to constantly control the temperature inside the pyrolysis heater, and there is an effect of producing high-purity pyrolysis products.

1 is a cross-sectional view showing an adiabatic structure of a conventional pyrolysis heater.
Fig. 2 is a cross-sectional view showing a main part of a thermal insulation structure of a conventional pyrolysis heater having a horizontal plate.
3 is a cross-sectional view showing the thermal insulation structure of the pyrolysis heater according to the present invention.
Figure 4 is an exploded perspective view of the horizontal plate and the insulating paper constituting the present invention.
5 is a perspective view of a horizontal plate according to another embodiment of a heat conduction blocking unit constituting the present invention.

The features and advantages of the present invention will become more apparent from the following detailed description of preferred embodiments based on the accompanying drawings.

Prior to this, the terms or words used in this specification and claims do not reflect the technical spirit of the present invention based on the principle that the inventor can appropriately define the concept of terms in order to best explain his or her invention. It must be interpreted with the corresponding meaning and concept.

In addition, terms or words used in the present specification and claims are only used to describe specific embodiments, and are not intended to limit the present invention.

For example, singular expressions include plural expressions unless the context clearly dictates otherwise. In addition, terms such as "comprise" or "include" or "has" are intended to indicate that there is a feature, number, step, operation, component, part, or combination thereof described in the specification, but one or more It should be understood that it does not preclude the possibility of the presence or addition of other features, numbers, steps, operations, components, parts, or combinations thereof.

In addition, when a part such as a layer, film, region, plate, etc. is said to be “on” another part, this includes not only the case where it is “directly on” the other part, but also the case where another part is present in the middle. Conversely, when a part such as a layer, film, region, plate, etc. is said to be "below" another part, this includes not only the case where it is "directly below" the other part, but also the case where there is another part in between.

In addition, terms including ordinal numbers such as “first” and “second” used herein may be used to describe various components, but the components are not limited by the terms, and the terms It is used only for the purpose of distinguishing one component from another.

Hereinafter, in describing an embodiment of the present invention in detail with reference to the drawings, the same reference numerals are used for the same components, and only different parts are mainly described so as not to overlap as much as possible for clarity.

3 is a cross-sectional view showing the thermal insulation structure of the pyrolysis heater according to the present invention, and FIG. 4 is an exploded perspective view of a horizontal plate and insulation paper constituting the present invention. As shown, the thermal insulation structure of the pyrolysis heater of the present invention is a wall surface (10), an insulation board (11) constructed to a certain thickness on the wall surface (10), a fireproof insulation brick (40) laminated on the surface of the insulation board (11), and along the wall surface (10). It is applied to a pyrolysis heater having a horizontal plate 100 installed at regular height intervals to support the load of the refractory insulating bricks 40.

According to the present invention, the horizontal plate 100 is made of a metal material having excellent strength and is composed of a vertical part 110 and a horizontal support part 120.

The vertical portion 110 is a member attached to the wall surface 10, and it is preferable to firmly attach it through welding, but it is not necessary to be limited thereto and it can be combined through various methods, of course.

The horizontal support part 120 is a member supporting the refractory insulating bricks 40, and is formed to protrude from the vertical part 110 at a right angle toward the front to support the refractory insulating bricks 40 stacked thereon.

The horizontal support part 120 is preferably firmly attached to the vertical part 110 through welding, but it can be combined in various ways, of course.

Meanwhile, a heat conduction blocking part 130 is formed on the horizontal support part 120 .

The heat conduction blocking part 130 blocks a path through which heat is conducted to the vertical part 110 through the horizontal support part 120 . When the heat conduction path toward the vertical portion 110 is blocked, it is possible to minimize heat loss caused by the heat inside the pyrolysis heater conducted to the wall surface 10 through the vertical portion 110 being released to the outside.

In this case, the heat conduction blocking part 130 may be a through hole formed in the horizontal support part 120 .

The heat conduction blocking part 130 in the form of a through hole is formed as long as possible along the left and right directions within the limit that does not interfere with the strength of the horizontal support part 120, and the vertical part 110 located at the rear from the front end of the horizontal support part 120 ) is preferably configured to block the heat conduction path in the front and rear direction as much as possible.

Although not shown, the heat conduction blocking part 130 may be formed in plurality.

In addition, it is preferable that the corner portion 131 of the heat conduction blocking portion 130 is rounded so that cracks do not occur while stress is concentrated.

According to the present invention, the horizontal plate 100 may further include a reinforcing support 140 installed between the vertical portion 110 and the horizontal support portion 120 to prevent sagging of the vertical portion 110 .

In this embodiment, the reinforcing support 140 is shown as an example installed on the upper part of the horizontal support 120, but it is not necessary to be limited thereto and may be installed on the lower part of the horizontal support 120.

The reinforcing support 140 is preferably firmly attached through welding, but it can be combined in various ways, of course.

On the other hand, it is preferable to install the reinforcing support 140 at a position crossing the thermal conduction blocking part 130 .

In this case, since the reinforcing support 140 directly or indirectly reinforces the heat conduction blocking portion 130 having the weakest strength, the overall structural strength of the horizontal plate 100 is greatly improved.

In addition, the horizontal plate 100 may be configured to be wrapped with fireproof insulation paper 200 in all sections.

In this case, since the fireproof insulation paper 200 preemptively blocks the heat inside the pyrolysis heater from being conducted to the horizontal plate 100, the inside of the pyrolysis heater conducted to the wall surface 10 through the horizontal plate 100 The heat loss caused by heat being released to the outside can be further minimized.

In addition, the refractory insulating brick 300 located at the upper end of the horizontal support part 120 of the horizontal plate 100 and the refractory insulating brick 400 located at the lower end of the horizontal support part 120 have corresponding uneven coupling surfaces 310 and 410, respectively. can have

In this case, the horizontal support part 120 is located between the uneven coupling surfaces 310 and 410 .

The concave-convex coupling surfaces 310 and 410 block exposure of the front end of the horizontal support part 120 of the horizontal plate 100 to the inside of the pyrolysis heater, thereby fundamentally blocking the conduction of heat inside the pyrolysis heater to the horizontal support part 120. It prevents heat loss caused by the heat inside the pyrolysis heater conducted to the wall surface 10 through the horizontal plate 100 being released to the outside.

On the other hand, it is preferable to fill the gaps between the uneven coupling surfaces 310 and 410 with a fireproof insulation interior material 500 to more completely block heat transfer to the horizontal support part 120 .

As the fireproof insulation interior material 500, a blanket made in the form of a cotton or blanket or a standardized module by adding chromia to alumina fibers and silica fibers is suitable. The blanket is light in weight and chemically stable, so it does not dry or burn even when water, steam, or oil penetrates, and since it does not use an organic binder, it does not contaminate the inside of the pyrolysis heater due to breakage due to combustion or burning of the binder. Considering that, it is very suitable for filling gaps between the concavo-convex coupling surfaces 310 and 410.

In addition, considering the thermal deformation of the horizontal plate 100, it is preferable that the uneven coupling surfaces 310 and 410 are formed to have a margin with the front end of the horizontal support part 120. The interior material 500 may be filled.

In this way, when the pyrolysis heater has the above insulation structure, the heat loss in the pyrolysis heater is minimized when the heat inside the pyrolysis heater is released to the inner wall through the medium of the roll of the horizontal plate 100, so that the temperature inside the pyrolysis heater can be constantly controlled. It is possible to produce high-purity pyrolysis products.

5 is a perspective view of a horizontal plate according to another embodiment of the heat conduction blocking part constituting the present invention. As shown, the heat conduction blocking part 130a may be a groove formed in the horizontal support part 120.

In this case, the heat conduction blocking part 130a is formed along the rear end of the horizontal support part 120 in close contact with the vertical part 110 as long as possible in the left and right directions within the limit that does not interfere with the strength of the vertical part 110. It is preferable to block the heat conduction path in the front-back direction from the front end of the horizontal support part 120 toward the vertical part 110 located at the rear as much as possible.

In addition, it is preferable that the corner portion 131 of the heat conduction blocking portion 130a is rounded so that cracks do not occur while stress is concentrated.

In this way, when the heat conduction blocking part 130a is made in the form of a groove at the rear end in close contact with the vertical part 110, it can reliably block the heat conduction path compared to the above-described heat conduction blocking part 130 in the form of a through hole. do.

This is because, in the case of the through hole, since the rear of the through hole and the vertical portion 110 are connected, partial heat conduction can be achieved through the connection portion.

In this way, although the preferred embodiments of the present invention have been described with reference to the drawings, the present invention is not limited to the above-described embodiments, and those skilled in the art to which the present invention belongs may modify without departing from the spirit of the present invention. It is possible, and such modifications will fall within the scope of the present invention.

100... horizontal plate 110... vertical part
120 ... horizontal support portion 130, 130a ... heat conduction blocking portion
140 ... reinforcement support 200 ... fireproof insulation paper
300,400...fireproof insulation brick 310,410...convex-convex bonding surface
500... fireproof insulation interior material

Claims (8)

A wall surface, an insulation board installed on the wall surface to a predetermined thickness, fireproof insulation bricks laminated on the surface of the insulation board, and a horizontal plate installed at regular height intervals along the wall surface to support the load of the fireproof insulation bricks. In the heat insulation structure of the pyrolysis heater having a,
The horizontal plate is composed of a vertical portion attached to the wall surface and a horizontal support portion protruding from the vertical portion toward the inside of the wall surface to support the refractory insulation bricks;
A heat conduction blocker is formed on the horizontal support part to block a heat transfer path to the vertical part and prevent heat loss caused by the heat inside the pyrolysis heater being conducted to the wall surface through the vertical part being discharged to the outside;
The refractory insulating bricks located at the upper end of the horizontal support of the horizontal plate and the refractory insulating bricks located at the lower end of the horizontal support have corresponding concavo-convex coupling surfaces in a stepped shape;
The horizontal support is located between the concavo-convex coupling surface;
A heat insulation structure of a pyrolysis heater in which a fireproof insulation interior material is filled in the gap between the uneven coupling surfaces to block heat transfer to the horizontal support. According to claim 1,
The thermal insulation structure of the pyrolysis heater, characterized in that the heat conduction blocking portion is a through hole formed in the horizontal support. According to claim 1,
The heat conduction blocking part is a groove part formed in the horizontal support part;
The insulation structure of the pyrolysis heater, characterized in that the groove is formed at an end in close contact with the vertical portion. According to claim 1,
The horizontal plate is a thermal insulation structure of a pyrolysis heater so that the whole section is wrapped with fireproof insulation paper. delete delete According to claim 1,
The horizontal plate is a thermal insulation structure of the pyrolysis heater further comprising a reinforcing support installed between the vertical portion and the horizontal support portion to prevent sagging of the vertical portion. According to claim 7,
The insulation structure of the pyrolysis heater, characterized in that the reinforcing support is installed at a position crossing the heat conduction blocking unit.

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