JP2003175316A - Structure of exhaust gas treatment tank of organohalogen compound decomposition apparatus - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide the structure of the exhaust gas treatment tank of an organohalogen compound decomposition apparatus capable of simply performing the inspection and maintenance of a heat exchange tube and an exhaust gas treatment tank. <P>SOLUTION: In the structure of the exhaust gas treatment tank of the organohalogen compound decomposition apparatus having an alkali liquid housed therein and provided with the heat exchange tube 58 immersed in the alkali liquid, a guide part 61 comprising a pair of guide plates 62 and 62 provided along the inner surface of the exhaust gas treatment tank 41 and the fixing part 63 having a fixing plate 64 detachable to the guide part 61 and guided by the guide part 61 to be permitted to move only in a vertical direction are provided. The heat exchange tube 58 is integrally attached to the fixing plate 64 and locked by the locking parts 66 provided to a pair of the guide plates 62 of the guide part 61 in a detachable manner to be held at a predetermined position in the exhaust gas treatment tank 41. <P>COPYRIGHT: (C)2003,JPO

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a structure of an exhaust gas treating tank of an organic halogen compound decomposing apparatus, and more particularly, to an exhaust gas treating tank of an organic halogen compound decomposing apparatus which is effective for attaching and detaching a heat exchange tube provided in the exhaust gas treating tank. Is related to the structure of.

[0002]

2. Description of the Related Art As an example of an organohalogen compound decomposing device for detoxifying an organohalogen compound such as CFCs, trichloromethane, and halon, an exhaust gas treatment tank containing an alkaline liquid therein and an alkaline liquid in the exhaust gas treatment tank Reaction tube provided with the lower end portion immersed in the tube, a cylindrical waveguide provided above the reaction tube, and a reaction tube that is provided inside the cylindrical waveguide and penetrates the lower end of the cylindrical waveguide. There is known one provided with a discharge tube communicating with the tube, a rectangular waveguide connected to the cylindrical waveguide, and a microwave oscillator mounted on the rectangular waveguide.

In the apparatus for decomposing an organic halogen compound having such a structure, an organic halogen compound such as CFC and water vapor are supplied to a discharge tube, and a microwave is transmitted from a microwave oscillator to a cylindrical waveguide through a rectangular waveguide. The organic halogen compound is decomposed into thermal plasma in the reaction tube by transmitting and causing discharge by the microwave electric field formed inside the cylindrical waveguide. Further, the generated gas generated by the decomposition reaction is neutralized by passing through the alkaline liquid, and the remaining gas containing carbon dioxide gas is discharged from the exhaust duct.

[0004]

By the way, since the neutralization reaction of the produced gas generated by the decomposition reaction of the organic halogen compound is an exothermic reaction, a cooling device is connected to the exhaust gas treatment tank to connect the cooling device to the inside of the exhaust gas treatment tank. The alkaline solution is cooled to prevent the heat of the alkaline solution from damaging the reaction tube and the like.

As a cooling device for cooling the alkaline liquid in the exhaust gas treatment tank, an air-cooled heat exchanger is connected to the exhaust gas treatment tank, and the alkaline liquid is circulated by a pump between the heat exchanger and the exhaust gas treatment tank. There are some that are designed to be cooled.

However, in the cooling device having such a structure, since the alkaline liquid in the exhaust gas treatment tank is a corrosive solution and has a solid-liquid two-layer flow, the heat exchange tubes of the heat exchanger are worn and corroded. As a result, there are problems such as metal thinning and hole formation in a short period of time, resulting in a very short life of the heat exchange tube. Further, the slurry is settled in the heat exchange tube, the heat exchange tube is clogged, and the cooling capacity is reduced in a short period of time.

On the other hand, the heat radiating portion of the heat exchanger is provided outside the exhaust gas treating tank, the heat exchanging tube is provided inside the exhaust gas treating tank, and a coolant such as water is circulated by a pump between the heat exchanging tube and the heat radiating portion. There is also a cooling device adapted to cool the alkaline liquid in the exhaust gas treatment tank.

In such a cooling device, the life of the heat exchange tube is long and the problem of clogging due to slurry does not occur, so that stable cooling capacity can be exhibited for a long period of time.

However, since the heat exchange tube is firmly fixed in the exhaust gas treatment tank with bolts or the like,
It takes a lot of time to attach and detach, and it takes a lot of time to check and maintain the heat exchange tube and the exhaust gas treatment tank.

The present invention has been made in view of the above-mentioned conventional problems, and the life of the heat exchange tube is long,
The problem of clogging due to slurry does not occur, stable cooling capacity can be exhibited for a long period of time.
It is an object of the present invention to provide a structure of an exhaust gas treatment tank of an organohalogen compound decomposing device in which the heat exchange tube can be easily attached and detached and the heat exchange tube and the exhaust gas treatment tank can be easily inspected and maintained.

[0011]

In order to solve the above-mentioned problems, the present invention employs the following means. That is, the invention according to claim 1 is a structure of an exhaust gas treatment tank of an organohalogen compound decomposing apparatus, which is provided in a state where an alkali liquid is contained therein and a heat exchange tube is immersed in the alkali liquid. A fixed part that is provided along the inner surface of the exhaust gas treatment tank, and a fixed part that is removable from the guided part and that is allowed to move only in the vertical direction by being guided by the guide part. The heat exchange tube is integrally attached to the. According to the structure of the exhaust gas treatment tank of the organic halogen compound decomposing apparatus according to the present invention, the heat exchange tube can be attached to and detached from the guide portion via the fixing portion, and can be guided by the guide portion when attached to the guide portion. Therefore, only vertical movement is allowed.

The invention according to claim 2 is the structure of the exhaust gas treatment tank of the apparatus for decomposing organic halogen compounds according to claim 1, wherein the guide portion is provided in a vertical direction provided along an inner surface of the exhaust gas treatment tank. It has a pair of guide plates facing each other, and the fixed portion is guided by the pair of guide plates. According to the structure of the exhaust gas treatment tank of the organic halogen compound decomposing apparatus according to the present invention, the fixed portion and the heat exchange tube are guided by the pair of guide plates of the guide portion, and the movement in only the vertical direction is allowed.

The invention according to claim 3 is the structure of the exhaust gas treatment tank of the apparatus for decomposing organic halogen compounds according to claim 1 or 2, wherein the exhaust gas treatment tank is attachable to and detachable from the bottom of the exhaust gas treatment tank. A locking portion which is guided by the guide portion and is allowed to move only in the vertical direction, and a portion of the heat exchange tube is partially locked to limit movement of the heat exchange tube in the horizontal direction. It is characterized by being provided. According to the structure of the exhaust gas treatment tank of the organohalogen compound decomposing apparatus according to the present invention, when the heat exchange tube is attached to the guide portion via the fixing portion, a part of the heat exchange tube engages with a part of the locking portion. By being stopped, the horizontal movement of the heat exchange tube will be restricted. Therefore, the heat exchange tube, by the cooperation of the guide portion, the fixed portion and the locking portion,
It will be held at a predetermined position in the exhaust gas treatment tank.

[0014]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of the present invention shown in the drawings will be described below. 1 to 7 show an embodiment of the structure of an exhaust gas treating tank of an organic halogen compound decomposing apparatus according to the present invention, FIG. 1 is a block diagram of the organic halogen compound decomposing apparatus, and FIG. 2 is an exhaust gas treating apparatus. Plan view of the tank,
3 is a cross-sectional view taken along the line AA of FIG. 2, FIG. 4 is a plan view of the fixing portion,
5 is a front view of the fixing portion, FIG. 6 is a plan view of the locking portion, and FIG. 7 is a front view of the locking portion.

In FIG. 1, a rectangular waveguide 1 has a microwave transmitter 2 for transmitting microwaves, and transmits microwaves from a starting end side to an end side.
The rectangular waveguide 1 is provided with an isolator 3 and a tuner 6 for bringing the plurality of wave adjusting members 4 into and out of each other for matching and for converging radio waves in the discharge tube 5.

The discharge tube 5 is composed of an inner tube and an outer tube, and is arranged so as to be coaxial with the central axis of the cylindrical waveguide 7. A Tesla coil 14 is inserted into the inner tube of the discharge tube 5 to generate a spark between the inner tube and the ignition device 13. Further, an optical sensor 17 is provided to monitor the plasma generation state by detecting the luminous intensity.

A gas supply pipe 16 is inserted into the discharge tube 5 along a tangential direction with respect to the outer tube, and the argon gas, the organic halogen compound, the air, and the water vapor are discharged through the gas supply pipe 16. It will be supplied inside.
The argon gas, the organic halogen compound, and the air are selectively sent from their respective supply sources to the heater 18 by opening / closing operations of the solenoid valves 19a, 19b, and 19c.

Argon gas is supplied to facilitate ignition prior to plasma generation and is stored in the argon cylinder 21. Argon cylinder 2
A pressure regulator 22 and a pressure switch 23 are provided between the valve 1 and the solenoid valve 19a.

The air is supplied from the air compressor 24 in order to remove the water remaining in the system to improve the stability of ignition and to discharge the gas remaining in the system. , Air, nitrogen gas, argon gas, etc. are used. The steam is necessary, for example, in the case of decomposing CFC gas, and is generated by sending the water in the water storage tank 26 to the heater 18 by the plunger pump 25. The water storage tank 26 is provided with a level switch 27 that detects a change in water level.

Freon gas, which is an example of an organic halogen compound to be decomposed, is stored in a recovered flon cylinder 28 as a liquid, and the recovered flon cylinder 28 and the solenoid valve 1 are stored.
9b, the expansion device 31, the mist separator 3
2 and a pressure switch 33 are provided. The expansion device 31 is provided in order to quantify the flow, and is configured by, for example, a combination of a capillary tube and an orifice.

The mist separator 32 is for removing oil (lubricating oil) and water contained in the fluorocarbon gas, and is of a collision type or a centrifugal type. The heater 18 is intended not only to generate steam that reacts with the chlorofluorocarbon gas, but also to preheat the chlorofluorocarbon gas or the like to avoid the problem that the steam is cooled by the chlorofluorocarbon gas or the like to be recondensed. The heating method such as electric type and steam type is adopted.

In the heater 18, two parallel flow paths 3 are provided.
4a, 34b are formed, and a freon gas, an argon gas, and air are introduced into one flow path 34a,
Water is introduced from the water storage tank 26 into the other flow path 34b to generate water vapor. The flow path 34b on the side of generating the steam is filled with a resistor 35 that gives resistance to the steam moving in the flow path 34b, so that the steam cannot flow smoothly in the flow path. Has become.

As the resistor 35, an inorganic or organic granular, fibrous or porous one, or a molded product thereof is adopted. From the viewpoint of preventing deterioration at high temperatures, SiO ₂ , Al is used. ₂ O ₃ , TiO ₂ , MgO, Zr
It is preferable to use an inorganic material such as an oxide represented by O ₂ or the like, or a carbide or a nitride. A thermocouple 36 is provided near the outlet of the heater 18.

The chlorofluorocarbon gas and the steam that have passed through the heater 18 are mixed in the mixer 37 and then supplied to the discharge tube 5 through the gas supply tube 16. Then, it is decomposed in the reaction tube 15 by the thermal plasma formed in the discharge tube 5.

The exhaust gas treatment tank 41 is for neutralizing and detoxifying the acidic gas (hydrogen fluoride and hydrogen chloride) produced when the fluorocarbon gas is decomposed, and calcium hydroxide is added to water. It contains an alkaline suspension.

For example, when the CFC to be decomposed is CFC R12 for the refrigerant recovered from the waste refrigerator, the gas produced by the decomposition reaction shown in Formula 1 is rendered harmless by the neutralization reaction shown in Formula 2. (Formula 1) CCl ₂ F ₂ + 2H ₂ O → 2HCl + 2HF + CO ₂ (Formula 2) 2HCl + Ca (OH) ₂ → CaCl ₂ + 2H ₂ O 2HF + Ca (OH) ₂ → CaF ₂ + 2H ₂ O

Since the neutralized products (calcium chloride and calcium fluoride) produced by the neutralization reaction of the formula 2 have a low solubility, some of them are dissolved in the alkaline solution, but most of them exist as a slurry. Further, the carbon dioxide produced by the decomposition reaction of Formula 1 and the acid gas reduced to a minute amount below the emission standard by the neutralization reaction of Formula 2 are discharged from the exhaust duct 42 connected above the exhaust gas treatment tank 41. Blower 43
Is discharged to the outside of the system.

A blow-in pipe 45 connected to the reaction pipe 15 through an exchange joint is arranged inside the exhaust gas treatment tank 41 so as to extend vertically with the open lower end portion thereof being immersed in an alkaline solution. ing.

A cooler 46 provided with a cold water pipe (not shown) is provided at an axially intermediate portion of the reaction tube 15 so as to surround the peripheral surface thereof. The cooler 46 cools the gas produced by the decomposition reaction of Equation 1, but is controlled so as not to cool below the dew point thereof in order to prevent recondensation of residual water vapor in the reaction tube 15. . For example,
Cool to about 400 ° C.

The cooling water (warm water) of the cooler 46 that has been warmed by cooling the reaction tube 15 is used as a heating source for the recovered CFC cylinder 28. That is, a heater 47 provided with a hot water pipe (not shown) is provided around the recovery flon cylinder 28, and the cooling water used for cooling the reaction tube 15 circulates through the hot water pipe to collect the recovered water. The front cylinder 28 is heated.

From the tip (lower end) of the blow pipe 45, the gas produced by the decomposition reaction of the formula 1 is discharged as bubbles in the alkaline liquid. The neutralization reaction in the alkaline liquid is promoted as the contact area between the bubbles and the alkaline liquid is large and the time it takes for the bubbles to reach the liquid surface is longer.
Inside, there is provided a bubble-dividing means 52 for accelerating the neutralization reaction of Formula 2 by finely dividing the bubbles.

The bubble dividing means 52 is fixed to a shaft portion 52b which is rotationally driven by a motor 52a, a disk-shaped blade holding portion 52c which is fixed to the tip of the shaft portion 52b, and an outer edge portion of the blade holding portion 52c. 6 blades 52d are provided.

The bubble dividing means 52 is a blade holding portion 52.
The center of c is arranged above the tip of the reaction tube 15, and the bubbles floating from the tip of the reaction tube 15 hit the blade 52d rotating at 300 rpm, for example, and are finely divided into bubbles having a diameter of about 3 mm to 5 mm. It Further, the bubble dividing means 52 also plays a role of producing a suspension of water-insoluble calcium hydroxide and water by stirring the calcium hydroxide powder put into the exhaust gas treatment tank 41.

In this embodiment, the exhaust gas treatment tank 41 is composed of a cylindrical tank body 53 whose lower end is closed, and a lid member 54 which closes the upper end opening of the tank body 53. Further, the exhaust gas treatment tank 41 is provided with a cooling device 55 for cooling the internal temperature of the exhaust gas treatment tank 41 to a temperature not higher than the heat resistant temperature of the suction pipe because the neutralization reaction of the equation 2 is an exothermic reaction.

The cooling device 55 is a brine type cooling device and is provided with an air type heat exchanger 56 and a pump 60. The heat radiating portion 57 of the heat exchanger 56 is provided outside the exhaust gas treatment tank 41, and the heat exchange tube 58 is provided inside the exhaust gas treatment tank 41, and a refrigerant such as water or antifreezing liquid is circulated between them, thereby treating the exhaust gas. The alkaline liquid in the tank 41 is cooled. The heat exchange tube 58 is detachably provided in the exhaust gas treatment tank 41 by cooperation of the guide portion 61, the fixing portion 63, and the locking portion 66 shown in FIGS. 2 and 3. The cooling device 55 is not limited to the brine type and may be a heat pump type cooling device.

The guide portion 61 is integrally provided on the inner surface of the tank main body 53 of the exhaust gas treatment tank 41, and is composed of the tank main body 5
A pair is provided so as to face each other with the center of 3 as the center. Each of the guide portions 61 is composed of a pair of rectangular plate-shaped guide plates 62, 62. The pair of guide plates 62, 62 are arranged at a predetermined interval in the circumferential direction, and each longitudinal direction is in the vertical direction. Width direction so that the tank main body 53
Is integrally joined to the inner surface of the tank main body 53 by welding or the like so as to face the center direction of.

The fixed portion 63 is detachably provided between the pair of guide plates 62, 62 of each guide portion 61. The fixed portion 63 includes a pair of guide plates 62, 62 and the tank body 5.
3 has an arcuate plate-like fixing plate 64 that matches an arcuate space formed in a portion surrounded by the inner surface of the guide plate 3. When the fixing plate 64 is mounted on each guide portion 61, the pair of guide plates 6
By being guided between 2 and 62, the movement in the horizontal direction (circumferential direction and radial direction) is restricted, and only the movement in the vertical direction (vertical direction) is allowed.

Three heat exchange tubes 58, 58, 58 are attached to the lower surface of each fixing plate 64. Each heat exchange tube 58 is formed in a coil spring shape so that the inflow port 58a and the outflow port 58b are located at the same end. In each heat exchange tube 58, one end portion provided with the inflow port 58a and the other end portion provided with the outflow port 58b are fitted into the respective mounting holes 65 provided in the respective fixing plates 64 shown in FIGS. 4 and 5. As a result, the fixed plate 64 is hung on the lower surface side. Therefore, each heat exchange tube 58 becomes detachable between the pair of guide plates 62, 62 of each guide portion 61 integrally with each fixed plate 64, and is guided by the pair of guide plates 62, 62 in the horizontal direction (circumference). The movement in the direction and the radial direction is restricted, and only the movement in the vertical direction (vertical direction) is allowed.

The engaging portion 66 is detachably provided on the pair of guide plates 62, 62 of each guide portion 61, and as shown in FIGS. 6 and 7, a bottom plate 67 having a substantially semicircular plate shape. , Bottom plate 6
7, and three locking plates 68 that are integrally provided upright on the upper surface side of 7. A pair of guide plates 6 are provided on the outer peripheral side of the bottom plate 67.
Engagement grooves 69 and 69 for engaging the two and 62 are provided, and by engaging the pair of guide plates 62 and 62 in the engagement grooves 69 and 69, the locking portion 66 in the horizontal direction (circumferential direction). And movement in the radial direction is restricted, and only movement in the vertical direction (vertical direction) is allowed.

Each locking plate 68 is provided at a portion corresponding to each heat exchange tube 58 attached to each fixed plate 64, and when the heat exchange tube 58 is attached to each guide portion 61 via the fixed plate 64. Further, each heat exchange tube 58 is fitted to the inner peripheral side of the lower end portion.

Therefore, each heat exchange tube 58, when mounted in the exhaust gas treatment tank 41, has a fixed portion 63 and a locking portion 6.
The movement in the horizontal direction (radial direction and circumferential direction) is restricted by cooperation with 6, and is held at a predetermined position in the exhaust gas treatment tank 41.

The inflow port 58a of each heat exchange tube 58 is connected to the pump 60 via the pipe 59, and the outflow port 58b is connected to the heat radiating portion 57 via the pipe 59, and the heat radiating portion 57 and each heat exchange tube 58 are connected to each other. By circulating a coolant such as water or an antifreeze liquid between them, the alkaline liquid in the exhaust gas treatment tank 41 can be cooled.

A thermocouple 70 is provided in the exhaust gas treatment tank 41, and the temperature inside the exhaust gas treatment tank 41 is detected by the thermocouple 70. Also, the exhaust gas treatment tank 4
1 is provided with a pH sensor 71 for detecting the pH in the exhaust gas treatment tank 41.

Since the slurry in the exhaust gas treatment tank 41 gradually increases with the lapse of operation time, after the operation is stopped, it is received by the solid-liquid separator 72 together with the alkali liquid, and is separated into solid-liquid, and then as waste. It will be disposed of or used for other purposes. On the other hand, the separated alkaline liquid is returned to the exhaust gas treatment tank 41 again and reused. The fluctuation of the liquid level in the exhaust gas treatment tank 41 is detected by the level switch 73.

In the structure of the exhaust gas treatment tank of the halogen compound decomposing apparatus according to the present embodiment configured as described above, the heat exchange tube 58 and the heat radiating section 57 of the cooling device 55 are provided.
Since water, a refrigerant such as an antifreeze liquid is circulated between and, since the alkaline liquid which is the corrosive solution in the exhaust gas treatment tank 41 does not circulate directly in the heat exchange tube 48,
Due to wear and corrosion of the heat exchange tube 58, the wall thickness will be reduced in a short time,
The problem such as the formation of holes is not caused, and the durability of the heat exchange tube 58 can be significantly improved. Further, as the alkaline liquid in the exhaust gas treatment tank 41, which is a solid-liquid two-layer flow, circulates in the heat exchange tube 58, the slurry precipitates in the heat exchange tube 58 and clogging occurs in the heat exchange tube 58. Therefore, the cooling capacity does not decrease in a short period of time, and a good cooling capacity can be exhibited in the long term. Furthermore, since three heat exchange tubes 58 are provided at positions facing each other with the center of the exhaust gas treatment tank 41 as the center, the alkali liquid in the exhaust gas treatment tank 41 can be evenly and efficiently cooled. Is.

Further, the heat exchange tube 48 has a fixed portion 6
3 is mounted on the guide part 61 in the exhaust gas treatment tank 41 via the third part, and is locked by the locking part 66 to be held at the mounting position, and in this case, the fixing part 63.
Since the engaging portion 66 is only guided by the guide portion 61 and is not fixed to the exhaust gas treatment tank 41 side by bolts or the like, the heat exchange tube 58 can be easily attached and detached. Therefore, the heat exchange tube 58 and the exhaust gas treatment tank 41 can be easily inspected and maintained, and the downtime of the device at the time of inspection and maintenance can be shortened.

In this embodiment, two fixing plates 64 are used, and three heat exchange tubes 58 are provided in each fixing plate 64. However, the number of fixing plates, the number of heat exchange tubes, etc. are different in the treatment layer. May be appropriately changed depending on the size of the treatment layer, and by appropriately setting these numbers, a desired cooling effect can be obtained according to the size of the treatment layer.

[0048]

As described above, according to the structure of the exhaust gas treatment tank of the apparatus for decomposing organic halogen compounds according to the present invention, the alkaline solution which is the corrosive solution does not circulate directly in the heat exchange tube. Therefore, the heat exchange tube is not worn or corroded in a short period of time, and problems such as hole thinning and hole formation do not occur, and the durability of the heat exchange tube can be significantly improved. In addition, since the alkaline liquid, which is a solid-liquid two-layer flow, circulates in the heat exchange tube, the slurry precipitates in the heat exchange tube, clogging occurs in the heat exchange tube, and the cooling capacity decreases in a short period of time. It is possible to exert a good cooling capacity in the long term without causing such a problem.

Further, the heat exchange tube is attached to the guide portion in the exhaust gas treatment tank through the fixing portion and is retained by the retaining portion at the retaining position by being retained by the retaining portion. Also, since the locking portion is only guided by the guide portion and is not fixed to the exhaust gas treatment tank side by bolts or the like, the heat exchange tube can be easily attached and detached. Therefore, the heat exchange tube and the exhaust gas treatment tank can be easily inspected and maintained, and the downtime of the device at the time of inspection and maintenance can be shortened.

[Brief description of drawings]

FIG. 1 is a block diagram showing an organic halogen compound decomposing apparatus to which a structure of an exhaust gas treatment tank of an organic halogen compound decomposing apparatus according to the present invention is applied.

FIG. 2 is a plan view showing an embodiment of a structure of an exhaust gas treatment tank of an organic halogen compound decomposing apparatus according to the present invention.

3 is a cross-sectional view taken along the line AA of FIG.

FIG. 4 is a plan view of a fixed part of the structure of the exhaust gas treatment tank of the organic halogen compound decomposing apparatus according to the present invention.

FIG. 5 is a front view of a fixed portion of the structure of the exhaust gas treatment tank of the organic halogen compound decomposing apparatus according to the present invention.

FIG. 6 is a plan view of a locking portion of the structure of the exhaust gas treatment tank of the organic halogen compound decomposing apparatus according to the present invention.

FIG. 7 is a front view of a locking portion of the structure of the exhaust gas treatment tank of the organic halogen compound decomposing apparatus according to the present invention.

[Explanation of symbols]

41 Exhaust gas treatment tank 58 heat exchange tubes 61 Information 62 guide plate 63 Fixed part 66 Locking part

   ─────────────────────────────────────────────────── ─── Continued front page    (72) Inventor Hitoshi Sato             3-1, Asahi-cho, Nishibiwajima-cho, Nishikasugai-gun, Aichi             Address Mitsubishi Heavy Industries Co., Ltd. (72) Inventor Soichiro Matsumoto             3-1, Asahi-cho, Nishibiwajima-cho, Nishikasugai-gun, Aichi             Address Mitsubishi Heavy Industries Co., Ltd. F-term (reference) 4D002 AA19 AA23 AC10 BA02 CA06                       DA05 DA12 HA10                 4G075 AA03 AA37 AA42 AA53 BA05                       BB04 BB05 BD27 CA03 CA26                       CA47 DA01 EA05 EB01 EB25                       EC01 EC09 EC13 ED02 EE21                       FB04

Claims (3)

[Claims] 1. A structure of an exhaust gas treatment tank of an organohalogen compound decomposing apparatus, wherein an alkali liquid is housed inside and a heat exchange tube is immersed in the alkali liquid. The heat exchange tube is provided with a guide portion provided along the inner surface, and a fixing portion that is detachable from the guide portion and that is guided by the guide portion and is allowed to move only in the vertical direction. The structure of the exhaust gas treatment tank of the organohalogen compound decomposing device, which is characterized in that 2. The structure of the exhaust gas treatment tank of the apparatus for decomposing organic halogen compounds according to claim 1, wherein the guide portion is provided with a pair of guide plates which are provided along an inner surface of the exhaust gas treatment tank and which face in a vertical direction. A structure of an exhaust gas treatment tank of an organic halogen compound decomposing apparatus, characterized in that the fixed portion is guided by the pair of guide plates. 3. The structure of the exhaust gas treatment tank of the organohalogen compound decomposing apparatus according to claim 1 or 2, wherein the guide portion is detachable from the bottom portion of the exhaust gas treatment tank and is guided to the guide portion. And only a vertical movement is permitted, and a part of the heat exchange tube is locked to a part thereof to provide a locking portion for restricting the horizontal movement of the heat exchange tube. Structure of the exhaust gas treatment tank of the organic halogen compound decomposing device.