JP2007105615A - Exhaust gas cleaning facility - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an exhaust gas cleaning facility capable of preventing bedewing onto an outer surface of a bag filter without increasing a facility cost. <P>SOLUTION: In the exhaust gas cleaning facility, dusts deposited on the bag filter are scraped off by feeding a dust-containing gas of a high temperature to a bag filter type dust-collector 1 to capture the dust and further blowing-in reverse washing air into the bag filter of the bag filter type dust collector. A part of air discharged from the bag filter type dust collector is blown-in into the bag filter as the reverse washing air by a separately provided fan 7. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to an improvement in exhaust gas purification equipment.

Conventionally, as one of the exhaust gas purification equipment, high temperature dust-containing gas is supplied to the bag filter type dust collector to collect the dust, and the dust adhering to the bag filter of the bag filter type dust collector is blown back with air. There are things that you have to pay off.

By the way, in the conventional exhaust gas purification equipment configured as described above, the air in the atmosphere is blown into the bag filter as backwash air by a compressor, a blower, or the like. For this reason, the backwash air cools the dust-containing gas around the bag filter, and the moisture in the dust-containing gas is condensed on the outer surface of the bag filter. Therefore, it has been proposed that the backwash air is heated in advance by a separately provided heating means and then blown into the bag filter.
Japanese Utility Model Publication No. 61-130317

However, the conventional exhaust gas purification equipment configured as above requires a compressor and a blower for pressurizing air in the atmosphere and a large and expensive heating means for preheating the backwash air, which increases equipment costs. There were problems such as.
The present invention has been made to solve the above problems, and an object of the present invention is to provide an exhaust gas purification equipment that can prevent condensation on the outer surface of the bag filter without increasing the equipment cost. It is in.

In order to achieve the above object, the exhaust gas purification equipment of the present invention supplies high-temperature dust-containing gas to a bag filter type dust collector, collects the dust, and further backwashes the bag filter type dust collector into the bag filter. In the exhaust gas purification equipment in which dust adhered to the bag filter is removed by blowing air, a part of the air discharged from the bag filter type dust collector is used as the backwash air by a separately provided blower. It is characterized by being configured to blow into the filter.

  What is configured in this manner is a bag filter type that is discharged from a bag filter type dust collector and has a temperature substantially the same as the temperature of the dust-containing gas around the bag filter and is separately provided as a backwash air. Since the air is blown into the bag filter of the dust collector, the backwash air removes dust from the bag filter without cooling the dust-containing gas around the bag filter.

   As is apparent from the above description, the present invention supplies high-temperature dust-containing gas to the bag filter type dust collector, collects the dust, and further blows backwash air into the bag filter of the bag filter type dust collector. Therefore, in the exhaust gas purification equipment that removes dust adhered to the bag filter, a part of the air discharged from the bag filter type dust collector is blown into the bag filter as the backwash air by a separately provided blower. Since air having a temperature substantially the same as the temperature of the dust-containing gas on the outer periphery of the bag filter is blown into the bag filter as backwash air, dew condensation on the outer surface of the bag filter is accurately performed in advance. Excellent practical effects such as being able to be prevented.

Hereinafter, an embodiment of an exhaust gas purification system to which the present invention is applied will be described in detail with reference to FIG. As shown in the figure, the exhaust gas purification equipment includes a bag filter type dust collector 1 that collects dust of a high temperature dust gas, and a high temperature dust gas that is connected to the bag filter type dust collector 1 via a damper 2 and a duct 3. Of the high-temperature air discharged from the bag filter type dust collector 1 connected to the duct 3 via the branch duct 5 and the open / close damper 6. A part of the blower 7 is fed as backwash air into the bag filter of the bag filter type dust collector 1.

What is configured in this manner is a bag filter which is discharged from the bag filter type dust collector 1 and has a temperature substantially the same as the temperature of the dust-containing gas around the bag filter and is separately provided as a backwash air by a blower 7 provided separately. Since the air is blown into the bag filter of the dust collector 1, the backwash air can remove the dust from the bag filter without cooling the dust-containing gas around the bag filter.

It is a schematic surface view which shows one Example of this invention.

Explanation of symbols

1
Bag filter type dust collector 3 Duct
4 Ventilator
5 Branch duct
7 Blower

Claims (1)

Supply high-temperature dust-containing gas to the bag filter type dust collector, collect the dust, and blow off the backwash air into the bag filter of the bag filter type dust collector so that the dust adhered to the bag filter is removed. In the exhaust gas purification equipment
An exhaust gas purification facility, wherein a part of the air discharged from the bag filter type dust collector is blown into the bag filter as the backwash air by a separately provided blower.