JPS636601Y2 - - Google Patents

Description

[Detailed Description of the Invention] This invention relates to a TV seat opening for monitoring the boiler combustion chamber used in power generation boilers, industrial boilers, marine boiler combustion furnaces, and the like.

Figure 1 shows a conventional boiler combustion chamber monitoring TV.
This will be explained with reference to FIG. 01 is the boiler combustion chamber, 0
2 is a combustion burner, 03 is a furnace wall tube that constitutes the combustion chamber 01, 04 is a television device that monitors the inside of the combustion chamber,
θ indicates the viewing angle of the television device. 05 is a TV seat opening made up of a furnace wall tube 03, 06 is a TV mounting seat with an air inflow groove, and 07 is an opening 05
08 is the air introduction pipe, 09 is the air blowing hole provided in the TV mounting seat 06, 010 is the air flow blowing out from the air blowing hole, 011 is the refractory for the furnace wall, 012 is the combustion Skin casing that seals gas, 013
024 indicates the heat insulating material for the furnace wall tube, and the attached clinker.

Since air is blown in a circular shape around the opening 05 from the air outlet 09, it can only prevent a small portion of floating ash from approaching, and there is also a limit to lowering the ambient temperature of the surrounding furnace wall tube 03. It was hot. Therefore, it is not possible to prevent the molten ash that is continuously floating over a wide area from approaching the periphery of the opening, and in situations such as clinker 024 adhesion, the clinker grows and the TV's field of view θ becomes smaller to θ ₁ , reducing the field of view. inhibited.

Therefore, in the case of coal firing or oil firing with a high ash content, the ash adheres to the area around the opening 05 of the TV seat, narrowing the TV's field of view θ, and especially in coal firing, clinker 024 adheres to the opening 05. This obstructed the TV's view, making the monitoring function inside the combustion chamber insufficient and causing trouble in boiler operation.

Furthermore, removing the clinker from this opening during boiler operation is dangerous because high-temperature combustion gas will be spewed out, and therefore, the clinker must be removed only when the boiler is stopped, which is inappropriate from the standpoint of stable boiler operation.

In the conventional example, as described above, the combustion ash adheres and grows around the TV opening, causing the opening to become clogged, making it impossible to monitor the combustion status in the combustion chamber of the boiler, which impedes the operation of the boiler.
This invention aims to improve the above-mentioned drawbacks.

This idea blows air into the furnace not only from the area very close to the TV seat opening, but also from a wide area, thereby preventing the molten floating ash burned in the furnace from getting close to the opening. . At the same time, by lowering the ambient temperature around the walls of the furnace wall tubes placed around the opening, the floating ash around the furnace wall tubes at the opening changes from a molten state to a solid state, and is transferred to the furnace wall tubes. Prevents adhesion. Therefore, it is possible to prevent clinker from adhering to the opening of the television seat, ensuring a view of the television at all times during boiler operation, and greatly contributing to the safe operation of the boiler.

An embodiment of the present invention will be explained with reference to FIGS. 4 and 5.

3 is a furnace wall tube, 4 is a television set, 5 is an opening for the television seat, 11 is a refractory for the furnace wall, 12 is a skin casing for sealing combustion gas, 13 is a heat insulator for the furnace wall tube, and 14 is a television mounting seat , 15 is an air chamber box for blowing air into the combustion chamber, 16 is an air introduction pipe to the air chamber box 15, 17 is a control valve for controlling the flow rate of air to the air introduction pipe 16, and 18 is a combustion chamber. A gap 20 in the furnace wall tube section for blowing air toward the furnace wall tube is a fin attached to the furnace wall tube.

Air branched from the boiler combustion air system is guided through an air introduction pipe 16 to an air chamber 15 attached to the TV mounting base 14, and from this chamber 15 is spread over a wide area around the opening 5 of the TV mounting base 14 to the furnace wall. Air is blown out from the gap 19 between the tubes 3 and 3 into the combustion chamber at an appropriate flow rate.

The present invention can prevent molten ash floating around the TV seat opening from approaching the TV seat opening by airflow blown from a wide area centered on the TV seat opening. Furthermore, even if the ash is in a molten state and is about to adhere to the furnace wall tubes, the atmospheric temperature around the furnace wall tubes is cooled by air, so the ash is immediately cooled and solidified, preventing it from adhering to the furnace wall tubes. .

[Brief explanation of the drawing]

Figures 1 to 3 show conventional examples, with Figure 1 being a side view of the boiler, Figure 2 being a cross-sectional view of the part where the television set is attached to the combustion chamber, and Figure 3 being taken in the direction of the - arrow in Figure 2. 4 is a cross-sectional side view of the opening of the present invention, and FIG. 5 is a front view taken in the direction of the - arrow in FIG. 4. 3...Furnace wall tube, 4...TV device, 5...TV seat opening, 14...TV mounting seat, 15...Air chamber box, 16...Air introduction pipe, 1
7... Control valve, 18... Air flow, 19...
...Gap in the furnace wall tube section, 20...Fin of the furnace wall tube.

Claims (1)

[Scope of utility model registration request] A TV seat opening for monitoring a boiler combustion chamber, characterized in that a gap is provided between a furnace wall tube and a furnace wall tube around the TV seat opening, and air is blown out from an air chamber box through the gap.