JPS59136115A - Dust collecting and gas exhausting system - Google Patents

Abstract

PURPOSE:To provide a dust collecting and gas exhausting system capable of easily collecting fine powdered dust, by spraying cooling water on molten slag and spatters in the inside of a suction vessel to generate steam, and cooling and condensing a gas mixture of the steam and fumes. CONSTITUTION:An opening of a hollow suction vessel 3 is brought into contact with the side face of a body 1 to be pierced such as a reinforced concrete. A molten slag 12 outflows by a piercing operation with a concrete poking bar 2, and spatters are scattered to generate fumes 14. When cooling water is sprayed from the nozzles 4' of a water spraying header 4, steam 15 is generated by the intense heat of the slag 12 and the fumes 13. When cooling water is sprayed from a spraying nozzle 5 provided to the bottom of the body 3, the fume 14 and the steam 15 are mixed uniformly and cooled moreover to condense into particles 16, which are easily collected and treated by a dust collector 9 incorporating a bag filter.

Description

Detailed Description of the Invention The present invention is a method for collecting and discharging dust to prevent the scattering of fumes and spatter generated during drilling work in the demolition work of concrete structures using a concrete melt (by the metal rod thermite method). It concerns the smoke system.

Conventionally, during drilling or demolition work of concrete structures using concrete melt, extremely high temperature molten slag flows out, spatter scatters, and extremely high temperatures (approx.
Because a large amount of fume (00°C to 3 sooa°C) was generated, workers were required to wear fireproof clothing, and the area around the workplace was prone to fires due to the scattering of molten slag and spatter. In addition, in urban areas, the occurrence of hyoum could be mistaken as a fire accident, and drilling and demolition work using molten concrete caused pollution in a broad sense. In addition, as a means of preventing pollution, the temperature of the processed material is extremely high (approximately 1000℃ to 30℃).
! ;00°C), there was a technical problem that conventional processing methods could not be applied to.

In view of the above-mentioned drawbacks, the present invention aims to improve the environment for workers and workplaces, and to prevent fume from being released to the outside.

According to Kuchi's invention, the dust collection system consists of a hollow suction can with three functions: cooling of molten slag in a predetermined position, prevention and cooling of @ spatter, and suction and cooling of θ fume; By connecting this suction can body and configuring it on a dust collector with a built-in bag filter, the bag filter can collect ultra-high temperature fumes that cannot be handled by conventional dust collection systems.

In this dust collection system, water vapor is generated by spraying cooling water towards dissolved slag and accumulated spatter in the suction canister, and then a mixture of water vapor and fume is sprayed with cooling water and inside the exhaust gas pipe. The present invention provides a dust collection/smoke exhaust system in which fine dust can be easily collected in a bag filter by cooling the air and condensing water vapor.

Next, embodiments of the present invention will be described with reference to the drawings. FIG. 1 is a partially cut away perspective view of the present invention. In the figure, the tip of a hollow suction can 3 that comes into contact with the side surface of a reinforced concrete member is open in a predetermined shape.

Also, inside the suction can body 3, a predetermined number of sprinkling holes are provided through a large number of water sprinkling holes. While sprinkling cooling water from the pressure feed boss 17 toward the spatter/3 deposited on the internal bottom surface of the body 3,
Water can also be sprinkled on the inner surface of the suction can body 3.

In addition, a concrete melting body 2 is inserted through the suction can body 3 at approximately the center thereof, and in order to prevent the spatter 73 that is ejected from the perforation l' bored by the concrete melting body 2 from scattering to the outside, An elastic penetrating member B, which has a radial notch on the rear side of the suction can body 3 and holds the concrete melting body 2 in a movable manner, is provided.

In addition, the rear upper surface V of the suction can body 3 is connected to the exhaust gas conduit connection portion 7.
', and a rectangular partition plate is provided below inside the suction can body l of the exhaust gas conduit connection part 7'.

Further, a spray nozzle 5 is provided at the front of the bottom of the suction can body 3 so as to face the penetrating member B and the exhaust gas conduit connecting portion 7', so that the cooling water coming up the pressure feed hose 17 can be sprayed.

A predetermined suction pipe 7 is connected to the exhaust gas pipe connecting portion 7', and a dust collector 9 having a built-in bag filter is connected thereto.

FIG. 2 is a schematic side cross-sectional view of the operating state shown in FIG. 1. In the figure, as a result of the drilling work performed by the concrete structure 2, molten slag/2 flows out from the drilled part/' of the drilled object/, spatter 13 scatters, and fume/
0 At this time, inside the suction can body 3, cooling water from the pressure feed hose 17 is sprayed from the numerous water sprinkling holes l' penetrated through the water sprinkling header l, and is sprayed along the side surface of the perforated hole l. A large amount of water vapor is generated due to the high heat of the molten slag/2 that has flowed out and the spatter 13 deposited on the bottom of the suction can body 3.In addition, the suction fan 9' installed in the dust collector 7 with a built-in bag filter is activated. The generated fume/l and water vapor 15 are passed through the exhaust gas pipe connection 7' and the suction pipe 7 to the dust collector 9 with a built-in dust filter.
At that time, the fume/4t and the water vapor 15 are mixed at the exhaust gas conduit connection part 7', and cooled by the pressure feed hose/7 from the spray nozzle provided at the front of the bottom of the suction can body 3. By spraying water, the mixture of fume lll and water vapor /j is further uniformly mixed and cooled.

When the mixture of hume II and water vapor/3 is cooled by the spray of cooling water and contact with the inner surface of the suction conduit 7,
The water vapor 15 condenses into large particles (particle size that can be captured by a bag filter) with the particles of fume /4/ as the core, and the ultra-high temperature fume /lI is collected by a dust collector with a built-in bag filter. Dust collection and smoke exhaust processing are possible.

Incidentally, the surplus cooling water in the suction can body 3 is dropped to the outside from the opened tip, thereby further cooling the molten slag/2.

The above description describes the suction can body assuming horizontal drilling work, but in order to make the suction can body applicable to upward drilling work or downward drilling work, the form shown in the other embodiments can be adopted. Good.

FIG. 3 is a perspective view, partially cut away, of another embodiment of the suction can body adapted for upward drilling operations. In the figure, the upper end of the hollow suction body 3 is opened in a flat shape so that it can come into contact with one surface of the body to be perforated, and is located at the position shown in the figure of the internal side surface of the suction body 3. Each has a built-in water supply pipe, a partition plate g1, an exhaust gas conduit connection part 7', and a spray nozzle 5. Further, on the bottom surface of the suction can body 3, there is provided an elastic control part benefiting discharge port 10 which can deposit a predetermined amount of fallen molten slag/2 and spatter/3 during the drilling operation and has a radial cut. At the same time, an elastic penetrating portion 1'4 for movably holding the concrete melting rod 2 is provided on the rear side surface of the suction can body 3.

During drilling work, cooling water is sprinkled and sprayed by the water spray header and the spray nozzle 3 towards the dissolved slag/2 and spatter/3 deposited in a predetermined amount on the bottom of the suction can body 3, and a large amount of water vapor is generated. Occur.

In addition, the water vapor generated and the fume generated from the perforation are
As in the previous embodiment, when the dust is fed into the dust collector with a built-in bag filter, it is mixed at the exhaust gas conduit connection 7', and further directed to the exhaust gas conduit connection 7' by the spray nozzle S.
By spraying more cooling water, water vapor and fume are uniformly mixed and cooled. The cooled water vapor condenses into large particles using hume particles as nuclei,
Ultra-high temperature fumes can be collected and removed using a dust collector with a built-in bag filter.

Note that when the dissolved slag/2 and spatter 73 deposited on the bottom surface of the suction can body 3 reach a predetermined amount (predetermined amount 1), the elastic control unit's interest-bearing discharge port 10 automatically opens due to its own weight, and falls to the outside. Moreover, the surplus cooling water falls to the outside through the gap between the radial cuts of the elastic control section interest-bearing discharge port IO.

FIG. 3 is a perspective view, partially cut away, of another embodiment of the suction can body adapted for downward drilling operations.

In the figure, the lower end of the suction can body 3 is opened in a substantially flat shape so that it can come into contact with the upper surface of the body l to be perforated.
A water spray header l1 spray nozzle 5, an exhaust gas conduit connection part 7', and a partition plate are provided at the positions shown in the drawing on the inner side surface of the suction can body 3, respectively. In addition, a penetrating member 6 is provided on the upper surface of the suction can body 3, and a concrete melting rod 2 is inserted through the suction can body 3 at a predetermined position inside the suction can body 3, and the cooling water is directly supplied to the perforated part /'. A plate-like ring // is fitted to prevent penetration.

During drilling work, cooling water is sprayed by a water spray header or a spray nozzle toward the dissolved slag 1.2 and spatter/3 deposited on the lower inside of the suction can body 3 (or on the upper surface of the body to be drilled). , can generate a large amount of water vapor.

The generated water vapor and the fume generated from the perforation are mixed at the exhaust gas pipe connection 7' when they are sent to the dust collector with a built-in bag filter, as in the previous embodiment, and are further transferred to the exhaust gas pipe connection 7'. Aim the spray nozzle S
By spraying more cooling water, water vapor and fume are uniformly mixed and cooled. The cooled water vapor condenses into large particles using hume particles as nuclei,
Ultra-high temperature fumes can be collected and removed using a dust collector with a built-in bag filter.

Incidentally, the surplus cooling water flows out from the gap between the upper surface of the perforated body and the lower end of the suction can body 3.

As mentioned above, the effects of the present invention are listed below.

■ Since the outer surface of the perforation is brought into contact with and covered by the suction can body, scattering of molten slag and spatter can be prevented, and there is no need to wear fireproof clothing. 5 Moreover, since cooling water is sprinkled and sprayed inside the suction can, dissolved slag and spatter are cooled and fires are prevented from occurring.

■ To spray/spray cooling water toward dissolved slag, spatter, or fume inside the suction canister,
A large amount of water vapor is generated, and the ultra-high temperature fume is cooled down. Due to the condensation of the water vapor, the fume particles appear to have increased in particle size, and can be easily captured with a normal bag filter.

■ Because the fume is sucked in through the suction can that is in contact with the perforated part, the amount of exhaust gas processed is smaller compared to methods using normal ventilation and smoke exhaust equipment, and the dust collection and smoke exhaust treatment of fume can be carried out efficiently. .

■ The collected fume particles are mixed with water and either adhere to the bag filter or flow down to the bottom tray of the dust collector, so the dust collector and bag filter are
No dust is generated during J, and the collected garbage can be easily disposed of.

[Brief explanation of drawings]

Fig. 1 is a partially cutaway perspective view of the present invention, Fig. 2 is a schematic explanatory side cross-sectional view of Fig. 1 in the operating state, and Fig. 3 is a suction canister adapted for upward drilling operation. FIG. 1 is a perspective view, partially cut away, of another embodiment of the suction can body adapted for downward drilling operations. l: Reinforced concrete member to be perforated /': Said perforated body perforation part 2: Concrete melting rod 3: Suction can body 4+! : Ladder for cooling water sprinkling l': Water sprinkling hole penetrating through the water sprinkling hole T: Cooling water spray nozzle B: Elastic penetrating member 7 2 suction conduit 7': Exhaust gas conduit connection part Z: Partition plate 9: Bug Dust collector 9' with a built-in filter: Suction fan 10 attached to the dust collector 2 Elastic control member Iq outlet //: Plate ring 12: Dissolved slag 13: Smatter/lI: Huyum/S: Water vapor/ B: Large particles after fume water droplets or water vapor 15 condenses / 7: Cooling water pressure port Figure 1 Figure 2

Claims (1)

[Scope of Claims] (1) The opening of a hollow suction can having a predetermined shape is brought into contact with the perforated body, and the can is movably held by an elastic penetrating member having a radial cut on the rear side surface of the can. The concrete melting frame is placed in almost horizontal contact with the object to be drilled to remove melted slag, spatter, and
A ladder is provided to multiple water sprinkling holes with a large number of water holes that spray cooling water in a predetermined direction. A dust collector characterized in that the spray nozzles for atomizing are placed in opposite positions, a suction conduit is connected to the exhaust gas conduit connection part, a suction fan is installed, and a dust collector has a built-in bag filter. Smoke extraction system. (2. In the suction can according to claim 1, a discharge port with an elastic control member for automatically discharging dissolved slag and spatter in a fixed amount is attached to the bottom separately from the elastic penetrating member, and the elastic penetrating member A suction can body with an upwardly perforated suction can body has a spray nozzle that sprays cooling water at a position facing the exhaust gas conduit connection part and the outlet with an elastic control member, and is connected by a suction conduit to the exhaust gas conduit connection part, and the suction can is A dust collection and smoke exhaust system characterized in that a fan is installed and a dust collector with a built-in bag filter is used to make upward holes. (3) In the suction can body according to claim 1, a plate is attached to the concrete melting frame. An elastic penetrating member is provided on the upper surface of the suction can body to direct cooling water toward the exhaust gas conduit connection, the plate ring, and the dissolved slag deposited on the surface of the perforated body. It is characterized by having a suction can body with a spray nozzle tucked inside at the spraying position, and a suction can body that is perforated downward, and a suction can body that is connected to the exhaust gas conduit connection part G by a suction conduit, and is perforated downward by a dust collector with a built-in suction fan and bag filter. dust collection and smoke extraction system.