JPS5885094A - Gas cooling tower - Google Patents

Abstract

PURPOSE:To improve the durability, facilitate the repair of the tower and prevent a public pollution by a method wherein the area, ready to be damaged, of a rubber incinerating furnace high-temperature poisonous gas cooling tower is coated by the lining of rubber or the like, a space is formed at the inside of the lining by a continuous spacer and a heat resistive panel is attached thereto. CONSTITUTION:A layer 5 of the lining, made of rubber of resin, is formed at the inner surface of the area 1 on a part of first vapor-liquid contacting section or the second vapor-liquid contacting section of the rubber incinerating furnace, which area can readily be damaged violently. Subsequently, the continuous spacer 1a is arranged in the up-and-down direction at the inside of the lining layer 5 to form a space 7 and the heat resistive panel 6 is attached thereto. A panel made of resin such as heat resistive vinyl ester resin series or the like reinforced by glass fiber or carbon fiber is utilized as the heat resistive panel 6. Air is sent into or discharged out of the space 7 to constitute an air cooling heat insulating layer between the outer cell 1 of the cooling tower and the heat resistive panel 6. According to such constitution, the durability of the tower may be improved and the repair thereof may be facilitated.

Description

[Detailed Description of the Invention] This invention consists of a cooling tower that cools high-temperature harmful gases generated in garbage incinerators, industrial waste incinerators, and other combustion equipment, and has a structure that is durable against high-temperature harmful gases and an easily repairable structure. This invention relates to a gas cooling tower for pollution prevention installation.

Conventionally, the gas introduction section near the top of the gas cooling tower in this type of pollution prevention device has been made of materials that can withstand the intense contact between the high-temperature gas and the cooling aqueous solution, resulting in large temperature differences [for example, anti-flinder stone (the main component SI'02), carbon bricks, etc., or made of high-grade alloys (Hastelloy C1 titanium, carpenter), but depending on the substance contained in the gas, the length M There were cases where it could not be used for a long time.

In particular, in cases where fluorine, hydrogen chloride, sulfur dioxide gas, etc. are mixed (such as in coal-fired flue gas desulfurization equipment), it is extremely difficult to select a corrosion-resistant material.

Therefore, since it cannot withstand long-term use, much labor and cost are required for replacement or repair. In addition, in the case of large-sized devices, it is difficult to construct structures that require replacement or repair, so there has been a tendency for expensive materials to be used.

Therefore, the inventors aim to increase the durability and save material by using an air-cooling insulation layer in the main body of the gas cooling tower that cools high-temperature gases containing harmful gases as described above. The project began with a search for a configuration that guarantees maintenance and a configuration that facilitates the installation and removal of the corrosion-resistant material in the first gas-liquid contact section of the gas cooling tower, which is the most susceptible to damage.

First, as resins used for corrosion resistance, unsaturated polyester resins, vinyl ester resins, epoxy resins, etc. can be used depending on their properties. phenolic vinyl ester resins are effective and are selected depending on the application, but novolak-based phenolic vinyl ester resins are particularly preferred. , a heat-resistant and corrosion-resistant material is constructed using such a vinyl ester resin, but the reinforcing material of the structure is glass fiber-based, carbon fiber-based, or a composite of carbon fiber and glass fiber. and use it as a reinforcement material,
Preferably, the panel is constructed of a highly heat resistant panel such as phenolic vinyl ester resin.

Next, an example of the configuration of this panel will be shown. The reinforcement material is
From the surface, one layer of carbon fiber is denoted by 2, one layer of glass chopped strand mat is denoted by M, and one layer of glass roving cloth is denoted by R. For example, this heat-resistant panel is impregnated with phenolic vinyl ester resin. A heat-resistant panel is constructed by combining reinforcing materials such as carbon fiber (Z), glass chopped strand mat (M), glass roving cloth (R), etc. in an appropriate order depending on the application.

For example, as an example of this configuration, the case of a 1211i heat-resistant panel made of reinforcing material impregnated with the above-mentioned resin used in this gas cooling tower will be shown.

This is ZZ MM RM RM RM 8
21ii of resin-impregnated carbon fiber (Z) from the surface, two layers of resin-impregnated glass chopped strand mat (M), and 11i of resin-impregnated glass roving cloth (R) in Mn order. #, Resin-impregnated crow chopped strand mat (M)
1 layer, repeat the R and M layers 3 times to make a total of 1゛2
It is constructed in layers.

This heat-resistant panel shows an example of implementation, and an appropriate combination of compositions is used as appropriate depending on the temperature of the gas introduced into the cooling tower and the composition of the components.

Although the harmful gas components introduced into the cooling tower are not constant depending on the combustion furnace, combustion equipment, combustion materials, etc., examples of gas components include 100 to 1000 pP+n for fluorine and 5.0 pP+n for hydrogen chloride. 00-2000 ppm, 802.80
3 is in the range of 500 to 200 CIPpm, and it is necessary to consider compositions of at least this level. Therefore, the coolant used is often a circulating caustic soda solution.

Therefore, appropriate resin components, reinforcing materials, and combinations thereof for the heat-resistant panel are selected in consideration of gas components, circulating coolant, and the like.

Next, an aspect of the durability structure of this cooling tower against high-temperature harmful gas will be specifically explained based on the drawings of one embodiment.

Fig. 1 shows an outline of an example of a gas cooling tower in longitudinal section, Fig. 2 is an enlarged sectional view of the first area (A) in Fig. 1, and Figs. 3 to 5 are FIG. 6 is an enlarged sectional view taken along line M-w in FIG. 1.

In the figure, (1) is the outer shell of the gas cooling tower (GOT), which is usually made of rolled steel (8841).
are connected at the flange portion (1b). (2) is a high temperature gas inlet containing various harmful components, usually at least one
It has a temperature of around 80° C., and (3) is an outlet for the cooled gas, which is led to an absorption tower and released as a harmless gas.

(4) is a cooling pipe, which is generally made of a corrosion-resistant nickel alloy, and has an appropriate number of spray nozzles (4
a) is provided. This embodiment shows an example of a gas-liquid contact portion having three zones, but the present invention is not limited to this, and the number of zones can be freely increased or decreased depending on the application.

In the figure, A is a first area and a first gas-liquid contact part, B is a second area and a second gas-liquid contact part, and C is a third area and a third gas-liquid contact part. Of these zones, the first zone is the most susceptible to damage, and therefore it is necessary to protect at least the first zone and a portion of the second zone with a heat-resistant panel. Therefore, the protection range is increased accordingly as necessary. Therefore, the 3rd ward Nourishing Department or other parts are also the 1st ward.
They may also be formed similarly to areas.

Figure 2 shows an enlarged cross-section of a part of the heat-resistant and corrosion-resistant structure made of heat-resistant panels of this cooling tower.
) on the top and bottom of the cooling tower (G) with continuous spacers (1a).
The upper and lower continuous spacers (
1a) is formed along the inner periphery of the outer shell, and the space (
A layer of rubber or resin lining (5) is set on the inner surface of the outer shell (1) corresponding to 7). (1b) is a flange portion indicating a joint portion of the outer shell portion (1).

In addition, if necessary, a valve for supplying and discharging air may be provided in the outer part (p) of the space (7) to forcefully circulate the air, or it may be considered that the air circulates naturally. In addition, the details of the fixing part (D) of the heat-resistant panel (6) to the spacer (1a) are as shown in the enlarged cross section of Fig. 3, by fixing the stud bolt (8) with a nut, or
Fix it to the heat-resistant panel with screw-in bolts.

In addition, the width of the heat-resistant panel (6) is limited due to the manufacturing equipment, so it must be assembled inside the cooling tower.
The details of their mutual joints (E in Figure 2) are shown in the enlarged cross-sectional view in Figure 4.The heat-resistant panels (6) are joined to each other by a homogeneous joint strip (9), and the outer periphery is Flange pipes (to) are provided at multiple locations, and the support plate (1) is fixed to the flanges, and is supported and fixed with resin coated bolts (6).In these locations, heat-resistant resin, etc. It is preferable to glue a partial spacer 03 made of a heat-resistant material.In addition, the details of the cooling pipe (-phantom insertion part (F)) are as follows.
As shown in Fig. 5, a flange pipe Q41 is provided on the outer part (1) of the insertion part, an insertion hole for the cooling pipe (4) is provided in the heat-resistant panel (6), and a heat-resistant panel is provided on the inside part. A support lid Q51 of the same quality is joined, a backing (2) is inserted into the space (7), and the support plate is fixed to the flange tube 0 by force α. Furthermore, as in FIG. 4, it is preferable to provide a partial spacer 03.

FIG. 6 shows a cross-sectional view taken along the line M-Vl in FIG.
) is the longitudinal joining strip of the refractory panel;
It is made of the same material as 6) and is glued to the joint,
The spacing varies depending on the dimensions of the heat-resistant panel. Further, Q9 is a chevron-shaped joint piece that joins the corners of the heat-resistant panel. An example is shown in which three cooling pipes (4) are arranged in parallel in each area.

As explained above, the structure of this cooling tower is such that the outer shell is first lined with rubber or resin, and a space is created to form a spacer, making it easy to assemble the heat-resistant panels. Not only can it be replaced, but it also has extremely high safety due to the formation of a triple layer of the space as an air cooling insulation layer, the layer of heat-resistant panel (6), and the layer of corrosion-resistant lining (5). It is. In particular, by forming the space, not only can the accumulation of heat in the heat-resistant panel be greatly suppressed, but also the influence on the outer shell is completely blocked, thermal aging of the lining 1- is also prevented, and the entire cooling tower is It has the feature of greatly increasing the durability life. In other words, in all respects, it provides a revolutionary durability life not seen in conventional gas cooling towers, so it will make a significant economic contribution.

[Brief explanation of the drawing]

Figure 1 is a vertical sectional view showing an outline of the gas cooling tower, Figure 2 is an enlarged sectional view of the first area (A) in Figure 1, and Figure 3 is the fixing part of the heat-resistant panel in Figure 2. Figure 4 is an enlarged cross-sectional view of the mutual joint (K) of the heat-resistant panels in Figure 2, Figure 5 is the insertion part (F) of the cooling pipe in Figure 2. FIG. 6 is an enlarged sectional view taken along the line ■-■ in FIG. (GC!T)...Gas cooling tower (1)...Outer shell (
1a)...Continuous spacer A...First area B...
・Second area D...Third area (5)...
Rubber lining or resin lining (6)...Heat-resistant panel (7)...Spatial Department Attorney, Patent Attorney Dai
Yasushi Shima, '□ s2g Figure 3 Figure 4

Claims (1)

[Scope of Claims] (1) In a gas cooling tower having gas-liquid contact parts in multiple zones for cooling high-temperature harmful gases, the inner surface of the outer shell of at least the first zone, which is most severely damaged, is provided with a rubber lining or resin lining. A heat-resistant panel made of heat-resistant resin reinforced with glass fiber and/or carbon fiber is placed on the inside of the panel, and a continuous spacer is interposed to form a space as an air cooling insulation layer, and the continuous spacer is plated. A gas cooling tower characterized by the fact that it is attached. +21 Claim 1 in which the heat-resistant panel is easily attached to and detached from the continuous spacer using bolts, etc.
Gas cooling tower as described in section. (3) The gas cooling tower according to claim 1, wherein air in the space is forcedly or naturally circulated.