Burner device, cooling pipe breakage detection method of burner device, and refrigerant control method of burner device

1. A burner device comprising:

a furnace wall of a combustion furnace;

a burner body which includes a furnace protruding portion protruding from the furnace wall into an interior of the combustion furnace;

a cooling pipe through which a refrigerant for cooling the burner body flows, the cooling pipe being disposed so as to surround an outer peripheral surface of the furnace protruding portion; and

a light detection unit for detecting internal light of the cooling pipe,

the light detection unit including

an optical fiber for transmitting light, the optical fiber being installed inside the cooling pipe,

a light detector detecting inner light from the cooling pipe, the inner light being transmitted by the optical fiber, and

a refrigerant supply pipe forming a flow channel for supplying the refrigerant to an inlet of the cooling pipe,

wherein a distal end of the optical fiber is installed inside a portion disposed so as to surround an outer peripheral surface of the furnace protruding portion in the cooling pipe,

wherein the cooling pipe is spirally wound a plurality of times in the furnace protruding portion,

wherein the inlet of the cooling pipe is located closer to a tip side of the furnace protruding portion than an outlet of the cooling pipe, and

wherein the optical fiber passes through the refrigerant supply pipe and is inserted into the cooling pipe through the inlet of the cooling pipe.

2. The burner device according to claim 1 ,

wherein the optical fiber includes a plurality of optical fibers, and

wherein respective distal ends of the plurality of optical fibers are disposed at different positions from each other in the cooling pipe.

3. The burner device according to claim 1 ,

wherein the cooling pipe includes

a tip-side cooling pipe through which a refrigerant for cooling the burner body flows, the tip-side cooling pipe being disposed so as to surround a tip-side region including a tip portion on an outer peripheral surface of the furnace protruding portion, and

a base-side cooling pipe through which the refrigerant flows, the base-side cooling pipe being disposed so as to surround a base-side region between the tip-side region and a base portion on the outer peripheral surface of the furnace protruding portion, and

wherein the optical fiber is installed inside the tip-side cooling pipe.

4. The burner device according to claim 3 ,

wherein the burner device further includes

a first refrigerant supply pipe for supplying the refrigerant to the tip-side cooling pipe and

a second refrigerant supply pipe for supplying the refrigerant to the base-side cooling pipe.

5. The burner device according to claim 1 ,

wherein the optical fiber includes a plurality of portions obtained by partially removing a clad which covers a core of the optical fiber such that the core is exposed.

6. The burner device according to claim 1 ,

wherein the combustion furnace is a gasification furnace gasifying fuel.

7. A cooling pipe breakage detection method of a burner device for detecting breakage of a cooling pipe of the burner device according to claim 1 , the method comprising:

a burner body cooling step of supplying the refrigerant to the cooling pipe;

a cooling pipe internal light monitoring step of monitoring internal light of the cooling pipe by the light detection unit; and

a breakage determination step of determining, based on a monitoring result by the cooling pipe internal light monitoring step, whether breakage occurs in the cooling pipe.

8. A refrigerant control method of a burner device for controlling supply of a refrigerant to a cooling pipe of the burner device according to claim 7 , the method comprising:

a tip-side region cooling step of supplying the refrigerant from the first refrigerant supply pipe to the tip-side cooling pipe;

a base-side region cooling step of supplying the refrigerant from the second refrigerant supply pipe to the base-side cooling pipe,

a cooling pipe internal light monitoring step of monitoring internal light of the cooling pipe by the light detection unit;

a breakage determination step of determining, based on a monitoring result by the light monitoring step, whether breakage occurs in the tip-side cooling pipe; and

a tip-side region cooling stop step of stopping only supply of the refrigerant to the tip-side cooling pipe if it is determined in the breakage determination step that breakage occurs in the tip-side cooling pipe.