JPH0120331B2 - - Google Patents

Description

[Detailed Description of the Invention] (Field of Industrial Application) The present invention relates to an indoor air conditioning method that has a heat radiation source such as a furnace or kiln inside, and particularly relates to an indoor air conditioning method where the heat radiation source is a radioactive waste incinerator or the like. The present invention relates to an indoor air conditioning method that has an optimal heat radiation source when various restrictions are imposed on exhaust gas treatment.

(Prior art) Incinerators for incinerating radioactive waste disposed of from nuclear facilities are installed indoors to prevent radioactive components in the exhaust gas from scattering. The exhaust gases are also subject to strict exhaust gas treatment before being released into the atmosphere. For indoor rooms where such heat radiation sources are installed, the first condition is to maintain the indoor temperature below 40℃ and the number of times the room is ventilated is 4 times /
A second condition is required: Hr or more. In general, indoor temperature can be maintained below 40℃ by increasing the number of indoor ventilations to 4 times/hour or more, but as the heat radiation source becomes larger, the number of indoor ventilations must be increased to 4 times/hour to satisfy the first condition. times/Hr, and there is a risk that the amount of exhaust gas from the room will increase and exceed the capacity of the exhaust gas treatment equipment. Therefore, in order to satisfy the first condition without unnecessarily increasing the number of ventilations in the room, a method has been adopted in the past to supply air that is significantly cooler than the outside temperature into the room, and for this purpose large-sized cooling equipment is required. The equipment costs and running costs were extremely high.

(Problems to be Solved by the Invention) The present invention solves these conventional problems and allows indoor ventilation while keeping the number of indoor ventilations to a minimum within the necessary range without using a conventional large-scale cooling device. This was completed with the aim of creating an indoor air conditioning method that has a heat radiation source that can maintain the temperature below 40°C.

(Means for Solving the Problems) The present invention supplies air into a room having a heat radiation source through an air supply duct, and part of the supplied air is sent to a hood formed around the heat radiation source. An exhaust port that allows the air to flow into the hood from the bottom opening to cool the heat radiation source and then exhaust it to the outside via the exhaust duct, while also releasing the remainder of the supplied air to a location away from the air supply duct. The feature is that the air is drawn into the exhaust duct and exhausted outside.

The present invention will be described in more detail below with reference to the drawings. Reference numeral 1 denotes an incinerator chamber surrounded by an airtight wall 2, and the incinerator 3 for radioactive waste serving as a heat radiation source and its exhaust gas filter are located inside the incinerator chamber. 4 are installed. 5 is an air supply duct installed near the ceiling of this room, and the air is cooled slightly from the outside temperature by a cooling unit 7 with a cooling coil 6, and then is supplied into the room from the air supply port 8 of the air supply duct 5. It bothers me. Incinerator 3 and exhaust gas filter 4 which are heat radiation sources
A hood 9 is formed around the hood 9 at a predetermined interval, and the lower end of the hood 9 is open as a lower opening 10, so that part of the air supplied into the room via the air supply duct 5 is The heat flows into the hood 9 through the lower opening 10, removes heat from the surface of the heat radiation source, cools the heat radiation source, and then exhausts the heat outside through the duct 11 and the exhaust duct 12. The exhaust duct 12 has an exhaust port 13 that opens at a position away from the air supply duct 5, and the remainder of the air supplied into the room via the air supply duct 5 is sucked into the exhaust duct 12 from the exhaust port 13. and then exhausted to the outside.
It is sent to the exhaust gas treatment device together with the exhaust from the hood 9. Note that it is preferable that the duct 11 and the exhaust port 13 be provided with dampers for adjusting the amount of exhaust from the hood and the amount of exhaust from the room, respectively.

(Function) In this way, in the present invention, the hood 9 is formed around the heat radiation source to prevent the heat radiated from the heat radiation source from dissipating into the room, and also to supply air into the room via the air supply duct 5. A part of the air is allowed to flow into the interior of the hood 9 through the lower opening 10 of the hood 9 to cool the heat radiation source, and then efficiently exhausted to the outside through the exhaust duct 12 together with the high heat filling the hood 9. Therefore, the remainder of the air supplied into the room is sucked into the exhaust duct 12 through the exhaust port 13, which opens at a position away from the air supply duct, to maintain the indoor ventilation frequency at about 4 times/hour. For example, it is easy to maintain the indoor temperature below 40℃, and this requirement can be met without significantly lowering the temperature of the air supplied indoors using conventional large-scale cooling equipment. It is possible.

(Example) Next, examples of the present invention will be shown.

In order to keep the temperature in a room with a volume of 5000 m3, in which a radioactive waste incinerator ³ with an incineration capacity of 700,000 kcal/Hr and an exhaust gas filter 4 are installed, below 40°C, the outside temperature must be 34°C and the supply air temperature must be 28°C. According to the conventional method,
It was necessary to supply and exhaust air at a rate of 57000Nm ³ /Hr. At this time, the number of times the room was ventilated was approximately 11 times/hour, and the exhaust gas treatment equipment could not be treated without being extremely large. In addition, the number of indoor ventilation was increased to 4 times/
In order to keep the indoor temperature below 40℃, the supply air temperature must be reduced by simply supplying and exhausting 20,000Nm ³ /Hr of air.
The temperature had to be lowered to 22°C, requiring a large cooling system. On the other hand, approximately 50
A hood 9 made of galvanized iron plate, aluminum plate, etc. is formed with an interval of mm, and the hood 9 is opened from the lower opening.
According to the method of the present invention, which allows air to flow into the inside of the room, the indoor temperature can be kept below 40°C by simply supplying and exhausting at a rate of 20,000 Nm ³ /Hr with the supply air temperature set at 28°C. We were able to reduce the capacity and the capacity of the cooling system to about 1/3.

(Effects of the Invention) As is clear from the above description of the embodiments, the present invention is capable of reducing the indoor temperature to a predetermined value or less while keeping the number of indoor ventilations to a minimum without using a large-scale cooling device like the conventional one. It is something that can be maintained. The present invention is particularly suitable as an air conditioning method for incinerator rooms for radioactive waste disposed of from nuclear facilities, but it goes without saying that it can also be used for air conditioning methods for rooms having other heat radiation sources. Therefore, the present invention eliminates the problems of the conventional technology and greatly contributes to the development of industry.

[Brief explanation of drawings]

FIG. 1 is a vertical sectional view showing an apparatus used for carrying out the present invention, and FIG. 2 is a partially cutaway plan view thereof. 3: Incinerator as a heat radiation source, 4: Exhaust gas filter as a heat radiation source, 5: Air supply duct, 9: Hood, 1
2: Exhaust duct, 13: Exhaust port.

Claims (1)

[Claims] 1. Air is supplied into a room having a heat radiation source through an air supply duct, and a part of the supplied air is fed into the interior of the hood through a lower opening of the hood formed around the heat radiation source. After cooling the heat radiation source, it is exhausted outside through the exhaust duct, and the remainder of the supplied air is sucked into the exhaust duct through an exhaust port that opens at a location away from the air supply duct. An indoor air conditioning method having a heat radiation source characterized by exhausting heat to the outside. 2. An indoor air-conditioning method having a heat radiation source according to claim 1, wherein the amount of exhaust from the hood and the amount of exhaust from the room are adjusted by dampers.