JPH0832888B2 - Asphalt melting pot for waterproof construction - Google Patents

Description

Description: TECHNICAL FIELD The present invention relates to a waterproofing asphalt melting pot for heating and melting solid asphalt in waterproofing work.

[Prior art and problems] In conventional waterproofing work, the asphalt waterproofing method, in which asphalt is heated and melted and the asphalt roofing is laminated using this molten asphalt, is widely used in Japan because of its high reliability. The current situation. The asphalt for waterproofing work used in this asphalt waterproofing method is carried into the construction site in a solid state in a bag. This is heated and melted using an asphalt melting pot for waterproofing work. The temperature of molten asphalt at this time is 300
Since it reaches around ℃, the smoke and odor emitted by heating and melting are quite intense. Especially in urban areas, there is a strong tendency to be strongly pointed out that it will lead to pollution.

The current method to improve this is to connect a deodorizing device separately prepared to the asphalt melting pot for waterproofing work to remove smoke and odor in the exhaust stream.
The general evaluation of this method is very high, and it is said that it is extremely effective for smoke removal and deodorization. However, it is also true that users have pointed out the following. Since the asphalt melting pot for waterproofing work and the deodorizing device are connected by using a flexible hose, the work space will be wide. Furthermore, disassemble the two when moving or be careful while connecting them. Since it is a work, it is difficult to move, and in the actual site it is highly likely that the flexible hose will be damaged and smoke and odor will leak because the asphalt melting pot for waterproofing work is moved one by one to perform the work. It is said that the hose itself becomes extremely hot and there is a risk of burns if it touches the face or hands.

Since the asphalt melting pot for waterproofing work and the deodorizing device are separated as described above, there are problems in terms of safety and work efficiency during work.

〔Purpose〕

An object of the present invention is to provide a compact, smokeless and odorless asphalt melting pot for waterproofing work, by solving the above drawbacks.

〔Constitution〕

The present invention is characterized in that a simple smoke removing / deodorizing device is incorporated and integrated in the main body of the melting pot. The filter part and the reburning burner of the present invention play the role of the smoke removing / deodorizing device. The cause of the bad odor generated from the melting pot is the oil mist, but since the particle size distribution of oil mist is extremely wide, large ones are removed by the filter part, and small ones are removed by the reburn burner.

The material, shape, and effective capacity of the pot body are not specified, but it is desirable to have an effective capacity of 160 to 320 kg of solid asphalt charge. Also, the inside of the combustion chamber must be coated with a suitable refractory material.

The burner for combustion is not specified, but the total calorific value is 20,000-
With a thermal power of about 200,000 Kcal / hr, kerosene, light oil, A as fuel
It is desirable that heavy oil can be used.

The filter section is composed of a filter box and a removable filter material, and the material and shape of the filter box are not particularly specified, but it is preferable that the filter section has an effective area of about 100 to 3000 cm ² . If the filter material is thick, it can be used for a long time, and if it is thin, it needs to be replaced in a short time.
Since the thickness eventually appears as a pressure loss of the filter, the thickness showing an appropriate pressure loss may be determined in relation to the capacity of the blower. Also, the connection with the exhaust pipe must be free of smoke and odor. Examples of the material of the filter material include quartz fiber, fused silica fiber, ceramic fiber, glass fiber, and metal mesh.

Although the suction device depends on the type of filter material, it is necessary that the blower has the discharge characteristics of a static pressure of 60 mmAq or more and an air volume of 5 m ³ / min or more. Moreover, since the exhaust flow is hot, it is necessary to have a heat resistant structure.

In the present invention, the skillful combination of blower capacity and filter capacity gives particularly good results.

The relationship between blower capacity and filter capacity is as follows: Blower static pressure 60 to 500 mmAq, preferably 150 to 250 mmAq Blower exhaust air volume 5 to 50 m ³ / min, preferably 7 to 10 m ³ / min Filter pressure loss 5 to 200 mmAq, preferably 20 to 70 mmAq An area of 100 to 3000 cm ^2, preferably a combination of 400 to 1000 cm ² is good.

〔Example〕

 Next, an example of implementation of the present invention will be described.

In the drawings, this figure is a cross-sectional view schematically showing an embodiment of the present invention. The waterproofing asphalt melting pot has an effective capacity of about 200 kg of asphalt charge. It has a combustion burner 1 at the bottom and burns in a combustion chamber 2 to heat and melt asphalt. Solid asphalt is charged from the charging port 3 and has a size capable of charging about 10 to 40 kg of solid asphalt. Also, a thermometer 4 is installed to control the temperature,
When this thermometer is connected to the burner 1, the burner is automatically turned off at a dangerous temperature to prevent overheating of the asphalt. Furthermore, it is convenient to automatically control combustion by means of this thermometer. Mist in the exhaust stream of molten asphalt is removed and treated as follows. An exhaust pipe 5 is provided on the upper lid of the asphalt melting pot for waterproofing work and connected to a filter box 7. A suction exhaust blower 8 is installed next to the filter box to guide the exhaust flow to the filter box. The blower causes the mist in the exhaust flow to collide with the filter material 6 at a high speed, causing a particle increase / diffusion phenomenon and dropping to the lower part of the filter. However, among the mist particles, those having an ultrafine particle size will pass through this filter. Therefore, the exhaust flow having passed through the filter is sent to the combustion chamber again by the re-combustion nozzle 9 without being diffused into the atmosphere, and the combustion process is performed. In this way, the mist in the exhaust flow is completely removed and then discharged from the chimney 10 into the atmosphere. The discharge characteristic of the exhaust blower for suction is static pressure 60 to 50.
It was confirmed that the particle growth and diffusion phenomena occur efficiently at about 0 mmAq. Moreover, the method of replacing the filter material was a simple method in which a filter cassette in which a glass fiber mat was fixed to a metal frame was attached.

〔effect〕

As described above, since the asphalt melting pot for waterproofing work according to the present invention has a very compact structure and the smoke removal / deodorization mechanism is also integrated, it has no smoke / odorless effect in waterproofing work. Not only that, it greatly reduces the danger during work and has a great effect on the improvement of safety.
This makes it possible to effectively use the energy of the easily combustible components generated from the deodorizing device. Further, since the asphalt melting pot for waterproofing work can be easily moved during transportation or work, it is effective in improving work efficiency.

[Brief description of drawings]

 FIG. 1 is a schematic sectional view of an embodiment of the present invention. 1 ... Combustion burner, 2 ... Combustion chamber, 3 ... Asphalt charging port, 4 ... Thermometer, 5 ... Exhaust pipe, 6 ... Filter material, 7 ... Filter box, 8 ... Exhaust blower, 9 ... Reburn Nozzle 10 …… Chimney, 11 …… Melted asphalt 12 …… Transfer pipe, 13 …… Asphalt discharge cock

Claims (1)

[Claims] 1. An asphalt melting pot used for waterproofing, from an asphalt melting pot, an exhaust pipe connected to an exhaust port provided above the asphalt melting pot, an exhaust blower connected to the exhaust pipe through a filter section, and an exhaust blower. A transfer pipe for transferring the exhaust gas, a reburning nozzle attached to the tip of the transfer pipe and opened near the reburning nozzle, and a heating burner for heating the asphalt melting pot. Asphalt melting pot for waterproof construction.