JPS5866713A - Structure of stack to insulate heat - Google Patents

Abstract

PURPOSE:To effectively and easily execute a heat insulating work for a stack, by constructing a plate tube inside the trunk of a stack for exhaust gas of high dewpoint, and by filling heat insulating material between the plate tube and the trunk. CONSTITUTION:A plate tube 2 made of material superior in heat-resistant and corrosion resistant properties such as fiber reinforced plastics, stainless steel, and the like, is constructed inside the trunk 1 of a stack, and heat-insulating and heat-retaining material 3 is filled in the gap between the trunk 1 and the plate tube 2. To construct the tube 2 inside the trunk 1 is greatly advantageous in comparison with the case that it is constructed outside the trunk 1, in respects of a cost and a method of work, and in the aspect of air-pressure resistant or rain-permeating proof structure.

Description

[Detailed Description of the Invention] Recently, the flue gas sent into the chimney has undergone pretreatment such as flue gas desulfurization treatment, has been diversified in energy, or has a high dew point such as special gas. When discharging the
When the outside temperature is low, the chimney is susceptible to corrosion due to condensation, and the exhaust gas becomes mist-like and difficult to diffuse, making it impossible for the chimney to perform its full function.

If the temperature of the exhaust gas inside the chimney can be prevented from decreasing, that is, if the temperature can be maintained above the dew point, it is possible to reduce the occurrence of dew condensation and improve the diffusion of exhaust gas. The dormitory has traditionally adopted the afterburning method.

However, the actual situation is that the energy consumption over time is quite large and it is a financial burden.

As an alternative, it may be possible to provide a heat insulating structure to the chimney.
In that case, if heat insulation is to be applied to the outside of the chimney barrel, it will be difficult to insulate the barrel with reinforcing materials, steady rests, etc. Furthermore, there are many structural problems such as wind pressure resistance during typhoons and prevention of rain infiltration, and they are also expensive.

The present invention has been made in consideration of the above points, and an object of the present invention is to make it possible to construct a device that can effectively retain heat while saving energy and can be easily constructed.

The chimney heat insulation structure according to the present invention includes a plate-shaped cylinder having excellent heat resistance and corrosion resistance, which is placed inside the cylinder with an appropriate distance between it and the inner surface of the cylinder. The whole area is constructed in a state where it can be urinated, and a heat insulating material is filled between the cylindrical body and the inner cylindrical body.

That is, U) Since the reduction in exhaust gas temperature is suppressed by constructing a heat insulating layer, there is no energy consumption like afterburning, and the initial cost of the equipment can be amortized relatively quickly. There is an overall economic effect.

(Since the construction of the 01 heat retaining layer is performed inside the cylinder body, which is inherently free of (very few) obstacles in terms of smoke exhaust performance, construction is relatively easy.

(c) Based on suppressing the decrease in exhaust gas temperature, it is possible to effectively suppress corrosion by reducing the occurrence of dew condensation, and improve exhaust gas expansion by reducing the occurrence of fog and fog droplets.

轡 Since the heat-retaining layer is protected from exhaust gas by the cylindrical body with excellent heat resistance and heat resistance, the desired effect can be maintained for a long period of time even if it is constructed inside the cylindrical body.

Embodiments of the present invention will be described below based on the drawings.

In Figures 1 and 2, which are schematic or conceptual diagrams, (1) is the chimney barrel, and (2) is the heat-resistant material such as fiber reinforced plastic (FRP) or stainless steel (5US816 is preferred). It is a plate-shaped cylinder with excellent durability and corrosion resistance, and the cylinder body (
1) It is arranged inside the inner surface at an appropriate distance from the inner surface so as to correspond to the entire area of the inner surface. (31 is a heat insulating heat insulating material filled in the space between the cylinder body (1) and the plate-like cylinder body (2). This heat insulating heat insulating material (31 is roughly divided into:
There are fibrous heat insulating materials such as Klokkoo and Reyagaraskool, (b) fired porous granules such as pearlite, and solidified materials of f→(a) and #I).
In particular, in the case of H, the heat insulating material and the plate-shaped cylinder are often integrated into a panel as described in 8 below.
, +41 is a protective cap from rainwater and direct sunlight.

A specific example of the above panel will be explained with reference to FIGS. 8 and 9.

The panel (5) is made by integrally bonding the surface material (g) to the surface of the molded heat insulating material (g) via adhesive (6).
2') is designed to protect the heat insulating material (8 2 sides (only) 4. Figure 5 shows an example of the structure of the joint part in the direction of the heat insulating area for each constituent material. Place the end of the panel +51. (51) on the metal fitting (7) welded to (1),
Apply the fibrous heat insulating material +81, +8) to the edge and tighten with the presser metal fitting (9) and the bolt donut al].
Furthermore, the fibrous heat insulating material lυ is packed, and the overlay side is applied after holding it down with FRP joints (12). Insulating material +8
1, (Iυ is glass fiber, rock cool fiber, etc., overlay 0 is polyester resin and glass fiber*, 11-component mat. I is a heat insulation layer made of air.

FIG. 6 shows an example of the structure of the joint portion fBl in the vertical direction.

+15, qe is clamping fitting, αη is tightening screw, α
The mark is an elastic heat insulating material, tll is an FRP joint, and ■ is an overlay similar to the above.

FIG. 7 shows an example of the structure of some joints +C) in the vertical direction. (Company) is an adhesive, and ■ is an overlay similar to the above.

There is also an adhesive method for attaching it to the barrel (1), which will be explained next.

FIG. 8 shows an example of the structure of the joint in the circumferential direction. @
：Tar-based ridge-resistant adhesive (with elasticity)、[Yes]：Water glass adhesive、4：Glass fiber Teflon-treated surface material (contact area with silicone rubber ■ is processed)、■：Silicon cured on site It's rubber.

An example of the structure of the joint +B) in the vertical direction is shown in FIG.

O,c! 41. Regarding ■, the same as above.

■ is silicone rubber, ■ is in-situ cured silicone rubber.

[Brief explanation of drawings]

The drawings illustrate an embodiment of the heat insulation structure for a chimney according to the present invention, in which FIG. 1 is a cutaway vertical sectional view, FIG. 2 is a cross-sectional plan view, and FIG.
5 and 4 are longitudinal sectional front views and longitudinal sectional side views of the panel, FIGS. 5 through 9 are enlarged portions, FIGS. 5 and 8 are cross-sectional plan views, and the others are longitudinal sectional views. (1)...Cylinder body, (2)...Plate-like cylinder body, (31...Insulation heat insulation material. Figure 1, Figure 2, Figure 3, Figure 4) figure

Claims (1)

[Scope of Claims] ■ A round plate-like cylinder (with excellent heat resistance and corrosion resistance) with an appropriate distance between the inside of the cylinder and the inner surface of the cylinder (1).
2) is constructed in such a manner that the cylindrical body (the entire area of the phantom inner surface or the entire surface area is covered), and a heat insulating material (3) is provided between the cylindrical body (1) and the internal cylindrical body (2). The chimney heat retention structure according to claim 0, wherein the internal cylindrical body (2) is made of fiber-reinforced resin material. ■ The chimney heat retention structure according to claim 0, wherein the internal cylinder (2) is made of fiber reinforced resin material. The heat insulating structure for a chimney according to claim 0 or 0, which is a shaped heat insulating material. ■ Claim 0 or 0, wherein the heat insulating material (3) is a fired porous granular material. The heat insulation structure of a chimney according to (1) The cylindrical body (2) and the heat insulating material (3) are integrated into a panel shape, according to any one of claims 0 to 0. Chimney insulation structure.