JPH05157309A - Air seal device at opening - Google Patents

Abstract

PURPOSE:To provide a positive shielding of flowing-in of surrounding air without accompanying any dusts by a method wherein a side wall and a top wall covering a transporting means are arranged near a flowing-in opening and a flowing-out opening for a processed material to the processing equipment, air is injected from the blowing port at the side wall in the width direction of the transporting means and sucked through the suction port at the upper wall. CONSTITUTION:In the case that an air seal device is applied to an entrance or exit opening of a facility having a dust crusher machine therein, a side wall 3 and a top wall 4 for covering a conveyor 2 to be mounted at each of the openings are provided, and the side wall 3 is provided with a plurality of air blowing ports 5 for discharging air horizontally toward a direction substantially crossing at a right angle with a moving direction of the conveyor 2. Opening of this air blowing port 5 is formed larger as it is approached to its lower position. A central part of the top wall 4 is provided with an air suction port 6 for use in sucking air discharged from the air blowing port 5 in a vertical upward direction. With such an arrangement, the air 10 blown out of the air blowing port 5 is discharged from the suction port 6 while forming a locus 7 and then a sufficient air sealing can be attained at each of the openings 101 and 102, respectively.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an air seal device which has an opening through which an object always passes and which can prevent the inflow of outside air into a device where it is difficult to provide an air seal air outlet on the bottom surface, and more particularly to a dust crusher. The present invention relates to the same device that can be advantageously applied to block the outside air inflow at the opening of the.

[0002]

2. Description of the Related Art The structure of an opening of a facility accommodating a conventional refuse crusher will be described with reference to FIG. In FIG. 7, 1 is a solid such as dust, 2 is its conveying line, 102 is an outlet opening, 103 is a baffle plate, and 104 is a dust crusher (structure is omitted for simplification). The inlet / outlet openings 101 and 102 (the inlet opening 101 is not shown) of the dust crusher 104 are in an open state because dust always passes therethrough. Therefore, in order to prevent the occurrence of an explosion in the crusher 104, when feeding the inert gas into the crusher 104, it is necessary to use an enormous amount of inert gas in consideration of invasion of outside air. . A noren-shaped baffle plate 103 may be provided in order to avoid this, but the baffle plate 103 does not perform a sufficient function because the passing objects have various sizes.

[0003]

[Problems to be Solved by the Invention] An input port of a waste crusher,
The discharge port is kept open because dust is constantly passing through it by the feeder and the conveyor, respectively. On the other hand, combustible substances are often mixed in the garbage, and it is difficult to avoid in-flight explosion due to sparks during crushing. To prevent this, the most reliable means is to always maintain the inside of the crusher in an inert gas atmosphere, but the size, amount, and properties of dust vary, so The movement is not constant. Therefore, the amount of the inert gas to be fed into the machine must be enormous in consideration of safety, and it is a great challenge to achieve this reduction in the amount of the fed gas from the viewpoint of energy saving and resource saving.

For this reason, a method of providing a baffle plate of noren shape is also adopted, but the effect is insufficient and it is best due to the blocking effect by the formation of an air flow film, but the opening is covered with a layer of dust. As a result, the suction port and the air outlet for gas (air, etc.) cannot be arranged vertically because they are constantly moving. It is also difficult to provide these on the left and right side surfaces in order to minimize the amount of dust that is sent.

In view of the above-mentioned state of the art, the present invention has an air seal of an opening portion capable of stably forming an air flow film capable of blocking the inflow of outside air while suppressing the accompanying transportation of dust by blowing up dust. It is intended to provide a device.

[0006]

According to the present invention, in a device in which an object to be processed flows in and out by a conveying means and the object to be processed is processed in an internal closed atmosphere, the outflow of the object to be processed into the device. A pair of side walls and an upper surface wall which cover the conveying means are provided near the inlet opening, and one or more blowers for horizontally ejecting air to the side walls are approximately orthogonal to the moving direction of the conveying means. An outlet is provided, the opening of the air outlet is made larger toward the lower position, and a suction port for sucking the discharged air vertically upward is provided on the upper surface wall. It is an air seal device for the opening.

That is, according to the present invention, a pair of side walls and a top wall of a means for supplying or transporting solids such as dust is provided with a cover, and a gas (air or the like) outlet is provided on the side wall and a suction is provided on the top wall. It is an air seal device for an opening in which a mouth is arranged and a film for blocking outside air by an air flow is formed.

One or more outlets on the side wall are provided in one row or a plurality of rows in the conveying direction of the object, and in the case of one, a slit-shaped opening having a wider width closer to the bottom is a basic shape. In the case of individual pieces, the basic shape is to make the outlet with a larger diameter closer to the bottom. Further, the air outlets are basically provided on both the left and right sides of the side wall, but only one side may be provided.

The suction ports of the upper wall are arranged in one or more rows in the object conveying direction, and one suction port or a plurality of suction ports having the same diameter or different types are arranged.

An adjusting damper may be provided for each of the blowout ports, the suction ports, or their compartments (chambers) so that the gas injection pressure (velocity) and suction pressure (velocity) can be adjusted.

Naturally, the height of the lowermost air outlet of the side wall is set so as not to be buried in the layer of the conveyed object.

[0012]

The gas flowing in from one or a plurality of side wall outlets traces a trajectory according to the respective diameters, wind pressures and outlet angles, reaches the suction port of the upper surface wall, and is discharged as exhaust gas. The shape and dimensions of the air outlet and suction port, the blowing speed and suction speed, and the blowing angle are selected so that the trajectory of the air flow is evenly distributed over the entire opening. An airflow film is formed.

If the flow velocity of the gas forming the air flow film is selected sufficiently higher than the air flow velocity of the outside air, the outside air is almost shut off.

[0014]

【Example】

(Embodiment 1) An embodiment of the present invention will be described below with reference to FIGS. 1 is a cross-sectional view of the waste crusher, and FIG. 2 is a cross-sectional view taken along the line AA of FIG. In FIGS. 1 and 2, 1 is solid such as dust, 2 is a conveyor, 3 is side wall of inlet and outlet, 4
Is a top wall of the inlet and the outlet, 5 is a plurality of outlets provided on the side wall of the inlet and the outlet (the diameter of the lower outlet is larger), 6
Is a suction port provided on the upper wall, 10 is blown air, 11 is suction air, 101 is an inlet opening, 102 is an outlet opening,
Reference numeral 104 is a dust crusher (detailed structure is omitted).

Since the air seal device for the opening has the air outlets 5 on the side wall 3 on both sides of the inlet side wall 3 (the same applies to the outlet side wall 3), the air 10 blown out from the air outlet 5 is provided.
Is discharged from the suction port 6 along a trajectory 7 as shown in FIG. As a result, the inlet opening 101 (the outlet opening 102
The same applies), sufficient air sealing is done.

When a plurality of air outlets 5 are provided, as shown in FIG. 3, the diameter of the lower outlets 5 is made large, and a damper 8 is provided at each outlet 5 to blow out the air. It is preferable to be able to adjust the amount.

When one air outlet 5 is provided, it is preferable to provide a slit-like outlet 5 having a wider width toward the bottom as shown in FIG.

(Embodiment 2) Another embodiment of the present invention will be described below with reference to FIG. FIG. 5 shows a case where the air outlet 5 is provided only on one side wall 3 of the inlet or outlet side wall 3. In the figure, the same reference numerals as those in FIGS.

Since the air seal device of the second embodiment also has the same operation as that of the first embodiment, the description thereof will be omitted.

An automatic shut-off mechanism 12 is provided in the pipe of the blowout port 5 at the lowermost stage of the air seal devices of the above-described first and second embodiments, so that the amount of solids such as dust increases and the blowout port 5 at the lowermost stage is increased.
The bottom outlet 5 when it is buried in solids such as dust
It is also a preferable embodiment that the air blown out of the chamber can be blocked.

[0021]

According to the present invention, a continuous curved airflow locus is formed between the blowout port of the side wall and the suction port of the upper wall while avoiding the conveyed object. As a result, the inside of the facility having an opening for transporting (sending and discharging) and the atmosphere are almost stably blocked.

Therefore, for example, in the case of a dust crusher, it is possible to greatly reduce the amount of inert gas that is being sent into the machine to prevent the explosion inside the machine, which saves energy and resources. To be achieved.

Further, since no mechanical shutoff device is used, a stable effect can be obtained irrespective of the size, shape and properties of solid matter such as dust, and wear can be avoided.

[Brief description of drawings]

FIG. 1 is a sectional view of an embodiment of an air seal device for an opening according to the present invention.

FIG. 2 is a sectional view taken along the line AA of FIG.

FIG. 3 is an explanatory diagram of the diameter of the air outlet when a large number of air outlets are provided.

FIG. 4 is an explanatory view of the shape of an outlet when one outlet is provided.

FIG. 5 is a cross-sectional view of the air outlet of another embodiment of the opening air seal device of the present invention.

FIG. 6 is an explanatory view of a preferred embodiment of the air outlet of the present invention.

FIG. 7 is an explanatory view of one mode of a conventional shutoff device for a closed atmosphere.

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Takenobu Mochida 12 Nishiki-cho, Naka-ku, Yokohama-shi, Kanagawa Mitsubishi Heavy Industries Environmental Engineering Co., Ltd. Yokohama branch office

Claims (1)

[Claims] 1. In a device in which an object to be processed flows in and out by a conveying means and the object to be processed is processed in an internal closed atmosphere, the object is processed near the opening of the inflow and outflow of the object to be processed. A pair of side walls and an upper surface wall for covering the conveying means are provided, and one or more air outlets for horizontally ejecting air are provided on the side wall so as to be substantially orthogonal to the moving direction of the conveying means. The air seal device for the opening of the sealed atmosphere treatment device is characterized in that the opening is formed so as to be closer to the lower position, and a suction port for sucking the discharged air vertically upward is provided on the upper surface wall.