Fluid processing device

Abstract

To provide a fluid processing device which inhibits corrosion of a coolant jet part caused by halide to achieve a long life.SOLUTION: A fluid processing device 1 processes a fluid containing halide and includes: a combustion part 10 which combusts the fluid; and a cooling part 20 provided with a fluid circulation passage 21a through which the fluid combusted in the combustion part 10 circulates and having a coolant jet part 22 which jets a coolant for cooling the fluid circulating through the fluid circulation passage 21a. The fluid circulation passage 21a has a bending part 21a1 which bends the downstream side of the fluid relative to the upstream side in a fluid circulation direction. The coolant jet part 22 is provided on a wall surface of the bending part 21a1 in the fluid circulation passage 21a and jets the coolant along an extending direction of a portion at the downstream side relative to the bending part 21a1 in the fluid circulation passage 21a.SELECTED DRAWING: Figure 1

Description

Technical Field

[0001] The present invention relates to a fluid treatment apparatus for treating fluids such as waste gas containing halides.

Background Art

[0002] As a conventional fluid treatment apparatus, there is known one including a combustion unit that burns a fluid such as waste gas containing halides, and a fluid flow path through which the fluid burned in the combustion unit flows, and a cooling unit that cools the fluid flowing through the fluid flow path with cooling water (see, for example, Patent Document 1). In the fluid flow path of the cooling unit, a cooling water injection unit that injects cooling water for cooling the fluid flowing through the fluid flow path is arranged, and the fluid flowing through the fluid flow path is cooled by the cooling water injected from the cooling water injection unit.

[0003] In the fluid flow path of the cooling unit of the fluid treatment apparatus, for example, the fluid burned at a temperature of 800 degrees Celsius or higher in the combustion unit is cooled to a temperature of 300 degrees Celsius or lower in a short time by the cooling water injected from the cooling water injection unit, thereby suppressing the generation of dioxins.

Prior Art Documents

Patent Documents

[0004]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0005] In the cooling water injection section of a conventional fluid processing apparatus, in order to bring cooling water into contact with the entire fluid flowing through the fluid flow path, a cooling water flow pipe through which the cooling water flows extends to the central portion of the cross section of the fluid flow path, and a nozzle is attached to the end of the cooling water flow pipe. For this reason, in a conventional fluid processing apparatus, members such as the cooling water flow pipe and the nozzle that constitute the cooling water injection section are corroded by halides such as hydrogen fluoride and hydrogen chloride generated by the combustion of the fluid, and damage and failure of the apparatus are likely to occur.

[0006] An object of the present invention is to provide a fluid processing apparatus capable of suppressing corrosion of a cooling water injection section by halides and achieving a longer service life.

Means for Solving the Problems

[0007] The fluid processing apparatus of the present invention is a fluid processing apparatus that processes a fluid containing halides, and includes a combustion section that burns the fluid, and a fluid flow path through which the fluid burned in the combustion section flows is formed, and a cooling section having a cooling water injection section that injects cooling water for cooling the fluid flowing through the fluid flow path. The fluid flow path has a bent portion that bends the downstream side with respect to the upstream side in the fluid flow direction, and the cooling water injection section is provided on the wall surface of the bent portion in the fluid flow path and injects cooling water along the extending direction on the downstream side of the bent portion in the fluid flow path.

[0008] Further, in the fluid processing apparatus of the present invention, it is preferable that the cooling water injection section injects cooling water such that at least a part of the injected cooling water flows through the central portion of the cross section on the downstream side of the bent portion in the fluid flow path.

[0009] Further, in the fluid processing apparatus of the present invention, it is preferable that the cooling section has a liquid layer forming section that forms a liquid layer on the wall surface on the upstream side of the bent portion in the fluid flow path.

[0010] Further, in the fluid processing apparatus of the present invention, it is preferable that the wall surface of the fluid flow path is made of a member having corrosion resistance.

Effects of the Invention

[0011] According to the present invention, since the fluid containing halides flowing through the fluid flow path can be cooled by the cooling water injection part arranged on the wall surface of the fluid flow path, it is possible to suppress the corrosion of the cooling water injection part by the fluid containing halides, and it is possible to extend the service life of the device.

Brief Description of the Drawings

[0012]

Figure 1

Figure 2

Figure 3

Embodiments for Carrying Out the Invention

[0013] FIGS. 1 to 3 show an embodiment of the present invention. FIG. 1 is a schematic view of a fluid treatment device, FIG. 2 is a cross-sectional view of the main part of the cooling part, and FIG. 3 is a cross-sectional view of the main part of the cooling part for explaining the details of the liquid layer forming part and the gas layer forming part.

[0014] The fluid treatment device 1 of the present embodiment detoxifies waste gas as a fluid containing halides such as fluorine, chlorine, and bromine used as a fire extinguishing agent or refrigerant in fire protection equipment without directly discharging it into the atmosphere. The fluid treatment device 1 decomposes halides by burning the waste gas at a temperature of 800 degrees Celsius or higher, and suppresses the generation of dioxins by cooling the waste gas after decomposing the halides to a temperature of 300 degrees Celsius or lower, which is lower than the temperature range where dioxins are likely to be generated, in a short time.

[0015] As shown in Fig. 1, the fluid treatment apparatus 1 includes a combustion section 10 for burning waste gas and a cooling section 20 for cooling the waste gas burned in the combustion section 10.

[0016] The combustion section 10 is a hollow member extending in the vertical direction with a combustion chamber 11 formed inside for burning waste gas. On the upper side of the combustion chamber 11, a gas inlet 12 for allowing waste gas to flow into the combustion chamber 11 is provided. Also, on the upper side of the combustion chamber 11, a fuel supply port (not shown) for allowing fuel necessary for burning the waste gas to flow into the combustion chamber 11 and an air inlet (not shown) for allowing air necessary for burning the waste gas to flow into the combustion chamber 11 are provided.

[0017] The cooling section 20 is arranged on the downstream side of the combustion section 10. As shown in Figs. 2 and 3, the cooling section 20 includes a main body 21 in which a fluid flow passage 21a for flowing the waste gas burned in the combustion section 10 is formed, a cooling water injection section 22 for injecting cooling water for cooling the waste gas flowing through the fluid flow passage 21a, a liquid layer forming section 23 for forming a liquid layer WL on the wall surface on the upstream side of the fluid flow passage 21a, and a gas layer forming section 24 for forming a gas layer AL on the surface of the liquid layer WL formed by the liquid layer forming section 23.

[0018] The main body 21 extends downward from the lower end of the combustion section 10 in a state of being connected to the combustion section 10, bends at a substantially right angle, and extends in the horizontal direction. The fluid flow passage 21a has its upstream end in the waste gas flow direction communicating with the lower end of the combustion chamber 11, and its downstream end communicating with equipment in the next process such as a scrubber. The fluid flow passage 21a has a bending portion 21a1 that bends the downstream side at a substantially right angle with respect to the upstream side in the waste gas flow direction, with the upstream side extending in the vertical direction and the downstream side extending in the horizontal direction. The wall surface of the fluid flow passage 21a is made of a member having heat resistance and corrosion resistance. The member having heat resistance and corrosion resistance is, for example, a nickel alloy containing metals such as chromium and molybdenum, such as Hastelloy (registered trademark) C.

[0019] The cooling water injection part 22 consists of a nozzle that injects liquid in a mist form and is provided on the wall surface of the bent part 21a1 in the fluid flow passage 21a. The cooling water injection part 22, like the wall surface of the fluid flow passage 21a, is made of a member having heat resistance and corrosion resistance. The cooling water injection part 22 injects cooling water along the extending direction on the downstream side of the bent part 21a1 in the fluid flow passage 21a. The cooling water injection part 22 injects cooling water so that at least a part of the injected cooling water flows through the central part of the cross section on the downstream side of the bent part 21a1 in the fluid flow passage 21a.

[0020] As shown in FIGS. 2 and 3, the liquid layer forming part 23 is provided at the end side on the upstream side in the flow direction of the waste gas in the fluid flow passage 21a. The liquid layer forming part 23 has a liquid storage part 23a that extends in the circumferential direction on the outer peripheral side of the fluid flow passage 21a. At the lower part on the inner peripheral side of the liquid storage part 23a, a liquid outlet 23a1 is formed over the circumferential direction of the fluid flow passage 21a, and the liquid flowing out from the liquid outlet 23a1 flows downward along the wall surface of the fluid flow passage 21a to form a liquid layer WL on the surface of the wall surface of the fluid flow passage 21a. The liquid flowing out from the liquid outlet 23a1 is, for example, an alkaline liquid. The liquid layer forming part 23 allows liquid to flow into and be stored in the liquid storage part 23a by a pump (not shown), and causes the liquid stored in the liquid storage part 23a to flow out from the liquid outlet 23a1. Here, the liquid used for forming the liquid layer WL may be the same as the cooling water injected from the cooling water injection part 22, or a separately dedicated liquid may be used.

[0021] As shown in FIG. 3, the gas layer forming part 24 is provided at the end side on the upstream side in the flow direction of the waste gas in the fluid flow passage 21a and on the inner peripheral side of the liquid storage part 23a. The gas layer forming part 24 has a gas flow part 24a that extends in the circumferential direction on the outer peripheral side of the fluid flow passage 21a. In the gas flow part 24a, a gas outlet 24a1 is formed over the circumferential direction of the fluid flow passage 21a on the inner peripheral side of the liquid outlet 23a1 of the liquid layer forming part 23, and the air flowing out from the gas outlet 24a1 flows along the liquid layer WL formed on the wall surface of the fluid flow passage 21a to form a gas layer AL on the surface of the liquid layer WL.

[0022] In the fluid treatment apparatus 1 configured as described above, the waste gas containing halides, which is the fluid to be discarded, is first made to flow into the combustion chamber 11 of the combustion unit 10 and burned at a temperature of 800 degrees Celsius or higher in the combustion chamber 11, thereby decomposing it into carbon dioxide, hydrogen fluoride, hydrogen chloride, and the like.

[0023] Next, the waste gas decomposed in the combustion chamber 11 is made to flow into the fluid flow path 21a of the cooling unit 20, and the waste gas flowing downstream of the bent portion 21a1 in the fluid flow path 21a is cooled to a temperature of 300 degrees Celsius or lower in a short time by the cooling water injected from the cooling water injection unit 22, thereby suppressing the generation of dioxins and making it flow into the equipment of the next process.

[0024] As described above, according to the fluid treatment apparatus of the present embodiment, there is provided a fluid treatment apparatus 1 for treating a fluid containing halides, which includes a combustion unit 10 that burns the fluid, and a fluid flow path 21a through which the fluid burned in the combustion unit 10 flows. The fluid treatment apparatus 1 further includes a cooling unit 20 having a cooling water injection unit 22 that injects cooling water for cooling the fluid flowing through the fluid flow path 21a. The fluid flow path 21a has a bent portion 21a1 that bends the downstream side with respect to the upstream side in the fluid flow direction, and the cooling water injection unit 22 is provided on the wall surface of the bent portion 21a1 in the fluid flow path 21a and injects cooling water along the extending direction downstream of the bent portion 21a1 in the fluid flow path 21a.

[0025] Thereby, it becomes possible to cool the waste gas flowing through the fluid flow path 21a by the cooling water injection unit 22 disposed on the wall surface of the fluid flow path 21a. Therefore, it becomes possible to suppress the corrosion of the cooling water injection unit 22 by the waste gas, and it becomes possible to extend the service life of the apparatus.

[0026] Further, it is preferable that the cooling water injection unit 22 injects the cooling water such that at least a part of the injected cooling water flows through the central portion of the cross section downstream of the bent portion 21a1 in the fluid flow path 21a.

[0027] As a result, it becomes possible to bring the cooling water into contact with the entire fluid flowing through the fluid passage 21a, so that it becomes possible to surely cool the fluid flowing through the fluid passage 21a.

[0028] Further, it is preferable that the cooling unit 20 has a liquid layer forming unit 23 that forms a liquid layer WL on the wall surface on the upstream side of the bent portion 21a1 in the fluid passage 21a.

[0029] As a result, since the wall surface on the upstream side of the bent portion 21a1 in the fluid passage 21a is covered with the liquid layer WL, it becomes possible to suppress corrosion of the wall surface on the upstream side of the bent portion 21a1 in the fluid passage 21a by the fluid.

[0030] Further, it is preferable that the wall surface of the fluid passage 21a is made of a member having corrosion resistance.

[0031] As a result, corrosion of the wall surface of the fluid passage 21a by the fluid flowing through the fluid passage 21a is less likely to occur, so that it becomes possible to further extend the life of the device.

[0032] In addition, in the above embodiment, a gaseous waste gas containing a halide is shown as the fluid containing a halide. However, the fluid containing a halide is not limited to a gaseous one, and may be in a liquid state at normal temperature. When the fluid containing a halide is liquid at normal temperature, for example, a liquid atomized by a two-fluid nozzle may be introduced into the combustion chamber 11 and burned.

[0033] Further, in the above embodiment, an alkaline liquid is shown as the cooling water for cooling the fluid flowing through the fluid passage 21a. However, the present invention is not limited to this, and the fluid flowing through the fluid passage 21a may be cooled by a neutral liquid or an acidic liquid.

[0034] Also, in the above-described embodiment, the bent portion 21a1 is shown to bend the downstream side at a substantially right angle with respect to the upstream side in the flow direction of the exhaust gas in the fluid flow path 21a. However, the present invention is not limited to this. The bent portion may be bent at an acute angle or an obtuse angle as long as the cooling water injection portion can be installed and the exhaust gas flowing through the fluid flow path can be cooled by the cooling water injected from the cooling water injection portion.

Explanation of Reference Numerals

[0035] 1 Fluid treatment apparatus 10 Combustion section 20 Cooling section 21a Fluid flow path 21a1 Bent portion 22 Cooling water injection portion 23 Liquid layer forming section 24 Gas layer forming section AL Layer of gas WL Layer of liquid

Claims

1. A fluid treatment apparatus for treating a fluid containing a halide, comprising: a combustion unit that burns the fluid; a cooling unit having a cooling water injection unit that forms a fluid flow path through which the fluid burned in the combustion unit flows and injects cooling water for cooling the fluid flowing through the fluid flow path; the fluid flow path has a bent portion that bends the downstream side with respect to the upstream side in the fluid flow direction; the cooling water injection unit is provided on the wall surface of the bent portion in the fluid flow path, and injects cooling water along the extending direction on the downstream side of the bent portion in the fluid flow path Fluid treatment apparatus.

2. The cooling water injection unit injects cooling water such that at least a part of the injected cooling water flows through the central portion of the cross section on the downstream side of the bent portion in the fluid flow path The fluid treatment apparatus according to claim 1.

3. The cooling unit has a liquid layer forming unit that forms a liquid layer on the wall surface on the upstream side of the bent portion in the fluid flow path The fluid treatment apparatus according to claim 1.

4. The wall surface of the fluid flow path is made of a member having corrosion resistance The fluid treatment apparatus according to claim 1.

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