JPH0429199Y2 - - Google Patents

Description

[Detailed description of the invention] [Field of industrial application] The present invention relates to a dust discharge device for a pressure vessel, and in particular, an upper dust discharge valve and an upper dust discharge valve are installed below the pressure vessel filled with gas containing dust, with an intermediate chamber in between. The present invention relates to a dust discharge device in which lower dust discharge valves are arranged in series.

[Conventional technology]

Conventional dust evacuation devices of this type generally have a plurality of on-off valves vertically connected below a pressure vessel.
When discharging dust, the on-off valves are repeatedly opened and closed in sequence starting from the upper one, and the dust is sequentially transferred to the lower valves, thereby suppressing the blowout of gas inside the pressure vessel and discharging the dust. It has become a thing. The above-mentioned system had the disadvantage that the equipment life was short because the on-off valve operated frequently. In order to eliminate this drawback, recently an intermediate chamber has been inserted between a plurality of on-off valves to extend the life of the equipment.

FIG. 2 is a diagram showing an example of a dust ejecting device of the type in which such an intermediate chamber is inserted. Second
As shown in the figure, a plurality of on-off valves provided below the pressure vessel 1 are divided into upper and lower stages, and an upper dust discharge valve 2 is installed.
and a lower dust discharge valve 3, and an intermediate chamber 4 is provided between them. In this way, the frequency of operation of the upper dust discharge valve 2 and the lower dust discharge valve 3 is reduced, and the life of the equipment is extended. However, in the above case, the gas remaining in the intermediate chamber 4 maintains the same pressure as in the pressure vessel 1, so when the lower dust discharge valve 3 is opened and the dust is discharged to the atmosphere side. However, there is a problem in that the gas remaining in the intermediate chamber 4 is ejected to the outside together with dust. In order to eliminate such problems, connect a discharge pipe 6 equipped with a discharge pressure valve 5 to the intermediate chamber 4, and open the discharge pressure valve 5 to increase the pressure inside the intermediate chamber 4 before opening the lower dust discharge valve 3. It was necessary to lower the atmospheric pressure to a certain level and then open the lower dust discharge valve 3.

[Problem that the invention attempts to solve]

In the conventional dust evacuation device shown in FIG. 2, an extra evacuation valve 5 is required in addition to the upper dust evacuation valve 2 and the lower dust evacuation valve 3, which is not only disadvantageous in terms of economy, but also 5 and the exhaust pressure pipe 6 flow instantaneously at high speed, problems such as wear and damage inside the valve body of the exhaust pressure valve 5 and dust clogging tend to occur. Further, since it is necessary to time the opening and closing of the exhaust pressure valve 5 and the lower dust exhaust valve 3, the dust exhaust operation becomes complicated, and there is also the problem that rapid and continuous dust exhaust cannot be performed.

Therefore, the present invention provides a dust exhaust device that can discharge dust quickly and continuously without requiring the dust exhaust valve to operate frequently, which has a long equipment life, and without causing damage to the valve mechanism due to high-pressure gas jets. The purpose is to

[Means for solving problems]

The present invention takes the following measures to solve the above problems and achieve the objectives. That is, in a dust discharge device in which an upper dust discharge valve and a lower dust discharge valve are arranged in series with an intermediate chamber below a pressure vessel filled with gas containing dust, on the outlet side of the lower dust discharge valve, An airtight cushion box is provided which has a volume equivalent to the atmospheric pressure of the gas retained in the intermediate chamber (a volume necessary to lower the internal pressure).

[Effect]

By taking such measures, due to the expansion action within the volume of the airtight cushion box,
The blowout of dust-containing gas from the outlet side of the lower dust discharge valve is alleviated, and special exhaust pressure equipment is no longer required.

〔Example〕

FIG. 1 is a diagram showing an embodiment of the present invention. However, the same parts as in FIG. 2 are given the same reference numerals, and detailed explanations are omitted.

As shown in the figure, an airtight cushion box 7 is provided on the outlet side of the lower dust discharge valve 3 to relieve exhaust gas pressure. A dust remover 8, an exhaust gas suction fan 9, and a dispersion pipe 10 are provided at the end of the dust which guides the dust and exhaust gas discharged through the cushion box 7.

In this apparatus configured in this manner, when the dust in the pressure vessel 1 is to be discharged, the upper dust discharge valve 2 is first opened to discharge the gas and dust in the pressure vessel 1 into the intermediate chamber 4 . After completing this discharge operation, the upper dust discharge valve 2 is closed.
Next, the lower dust discharge valve 3 is opened to discharge the dust and gas in the intermediate chamber 4 downward. In this case, gas having a pressure similar to that in the pressure vessel 1 is ejected from the intermediate chamber 4, but the pressure of the emitted gas is relaxed by the expansion action of the cushion box 7, and the gas is ejected into the dust. The dust-containing exhaust gas discharged into the dust is removed by a dust remover 8 to become clean gas, and then sucked by an exhaust gas suction fan 9 and dissipated into the atmosphere via a diffusion pipe 10.

In this manner, according to the present device, the blowout of dust-containing gas from the outlet side of the lower dust discharge valve 3 is alleviated by the expansion action within the volume of the cushion box 7. Therefore, there is no risk that the discharge valve 3 or the like will be damaged.
This eliminates the need for special exhaust pressure equipment as in the past, simplifies the equipment accordingly, and eliminates troubles caused by these parts. As a result, the continuous operation of the dust discharge device can be extended for a long period of time. Moreover, the exhaust gas that has passed through the cushion box 7 has dust removed from it by the dust remover 8, and the purified gas is quantitatively exhausted by the suction fan 9 and released into the atmosphere. Harmful effects such as air pollution will not occur.

It should be noted that the present invention is not limited to the one embodiment described above, and it goes without saying that various modifications can be made without departing from the gist of the present invention.

[Effect of idea]

According to the present invention, an airtight cushion box is provided on the outlet side of the lower dust discharge valve, which has a volume equivalent to the atmospheric pressure of the gas remaining in the intermediate chamber (the volume required to lower the internal pressure). Due to the expansion action within the volume of the airtight cushion box, the blowout of dust-containing gas from the outlet side of the lower dust discharge valve is alleviated, and special exhaust pressure equipment is not required. As a result, it is possible to provide a dust evacuation device that can quickly and continuously emit dust without the need for operating the dust evacuation valve frequently, which has a long equipment life, and without causing damage to the valve mechanism due to high-pressure gas ejection.

[Brief explanation of the drawing]

FIG. 1 is a system diagram showing an embodiment of the dust discharge device of the present invention, and FIG. 2 is a system diagram showing an example of a conventional dust discharge device. 1...Pressure vessel, 2...Upper dust discharge valve, 3
... Lower dust discharge valve, 4 ... Middle chamber, 5
...Exhaust pressure valve, 6...Exhaust pressure piping, 7...Cushion box, 8...Dust remover, 9...Suction fan, 1
0...Dissipation tube.

Claims (1)

[Scope of Claim for Utility Model Registration] In a dust discharge device in which an upper dust discharge valve and a lower dust discharge valve are arranged in series with an intermediate chamber sandwiched between the lower part of a pressure vessel filled with gas containing dust, the lower dust discharge A gas-tight cushion box is provided on the outlet side of the valve and has a volume equivalent to atmospheric pressure that can reduce the pressure of the impulsive gas ejected from the intermediate chamber to a pressure equivalent to atmospheric pressure. dust evacuation device.