JPS59212617A - Ash transferring device - Google Patents

Abstract

PURPOSE:To prevent the burn-out of a bag filter, by installing a line for emergency which connects the outlet of the cyclone separator of an ash transfer line to a vacuum pump through the other separator. CONSTITUTION:A line 6 for fly sh emergency is connected from the outlet of a fly ash cyclone separator 4 to the inlet of a bottom ash cyclone separator 9, and a line 11 for bottom ash emergency is connected from the outlet of the bottom ash cyclone separator 9 to the inlet of the fly ash cyclone separator 4. For example, in case a temperature detector 16 for bottom ash indicates the abnormally high temperature of transfer ash, the line 11 for emergency is employed, the transfer ash is caused to pass through the fly ash cyclone separator 4 after passing through the bottom ash cyclone separator 9, and the use of a bypass line 7 enables to perform continuous operation without using a bag filter 5.

Description

[Detailed description of the invention] The present invention relates to an ash transfer device.

In the conventional vacuum type conveyor system for the coal-fired boiler 01i, as shown in the system diagram in Figure 1, cyclone separators 04.09 for ash collection are provided in the middle of the transfer pipes 03 and 08, but the collection effect (・In order to reduce -, bag filters 05 and 010 are provided downstream of each.

However, since this bag filter 05゜0100F cloth is made of cloth or synthetic fiber, if the combustion condition of the boiler is poor and high-temperature ash or burning coal is transferred, the F cloth may be burnt out. 02 is an exhaust gas dust collector, and 013 is a vacuum pump.1 The present invention was proposed in view of the above circumstances, and provides an ash transfer device that prevents burnout of bag filters. The purpose is to

To this end, the present invention comprises a first ash transfer line and a second ash transfer line each having a cyclone separator and a bag filter connected in series, and the bag filters of both ash transfer lines are connected to a vacuum pump. The ash transfer device is characterized by comprising an emergency line connecting the outlet of the cyclone separator of the one ash transfer line to the vacuum pump via the cyclone separator of the other ash transfer line.

An embodiment in which the present invention is applied to a coal-fired boiler will be described with reference to the drawings. FIG. 2 is a system diagram thereof.

In the above diagram, 1 is a coal-fired boiler, 2 is a dust collector, 3 is a fly ash transfer line, 4 is a fly ash cyclone separator, and 5 is a fly ash bag filter-1
6 is a fly ash emergency line, 7 is a fly ash bag filter-5 bypass line, 8 is a bottom ash transfer line, 9 is a bottom anshu cyclone separator, 10H# Tom Ash bag filter-111 is a bottom ash emergency line, 12 is a bypass line, 13
is a vacuum pump, 14 is a fly ash storage silo, 15 is a
is a bottom ash storage silo, and 1G is a temperature detector that detects the temperature of the ash in the transfer lines 3 and 8, respectively.In such a device, the ash produced from the coal-fired boiler 1 is divided into fly ash and bottom ash. The separated fly ash contained in the combustion gas is collected by a precipitator 2, and the collected ash is sucked in by a vacuum pump 13 via a fly ash transfer line 3, and then sent to a fly ash cyclone separator 4 and a fly ash bag filter. -5 and stored in the flybush storage silo 14.

On the other hand, bottom ash generated in the lower part of the boiler is sucked into the vacuum pump 13 via the bottom ash transfer line 8, collected by the bottom ash cyclone separator 9 and bottom ash bag filter 10, and stored in the bottom ash storage silo 15. At 5°, the fly ash emergency line 6 is connected from the outlet of the fly ash cyclone separator 4 to the inlet of the pol-muatshu cyclone separator 90, and the bottom ash emergency line 11 is connected to the bottom ash cyclone separator 9. The outlet is connected to the inlet of the fly ash cyclone separator 4.
It is now possible to operate in stages.

In this case, for example, if the bottom ash temperature detector 16 indicates an abnormally high temperature of the transported ash, the bottom ash cyclone separator 9. If the bottom ash bag filter Lot is used, there is a possibility that the bag filter 10 may be burnt out.Therefore, using the emergency line 11, pass the bottom ash cyclone separator 9 through the niflier cyclone separator 4, and bypass it. By using the line 7, it is possible to continue operation while effectively collecting ash without using the bag filter 5. In this case, the transfer from the fly fish transfer line 3 is temporarily stopped.

This is exactly the same in the case of fly ash, and operation can be continued without using a bag filter.

According to such a device, the following effects can be achieved.

(1) Even if the temperature of the transferred ash is high and there is a risk of burnout of the bag filter, or if the bag filter cannot be used due to maintenance or inspection of the bag filter, ash treatment can be carried out with sufficient collection efficiency. Able to continue driving 1(2)
The system switching operation described above can be performed remotely, or can be automatically switched at abnormally high temperatures.

(3) As in this example, if there are separate storage silos and each is equipped with a cyclone, there is no need to newly install a spare cyclone, and one silo has a cyclone and a bag filter. - Even if there is only one cyclone each, by simply adding one cyclone, the additional cyclone can function as a backup cyclone, rather than being at the height required to perform the above operations.
A highly reliable system can be achieved.

(/l) The present invention can be applied to the soot and dust collection process of heavy oil-fired boilers. In short, according to the present invention, a first ash transfer line is formed by connecting a cyclone separator and a bag filter in series. and a second ash transfer line, in which the bag filters of both of the ash transfer lines are connected to a vacuum pump, the outlet of the cyclone separator of one of the ash transfer lines is connected to the other ash transfer line. By providing an emergency line connected to the vacuum pump through the cyclone separator of the cyclone separator, the present invention is extremely useful for the industry since a safe ash disposal device is obtained which prevents the bag filter from being burnt out.・

[Brief explanation of drawings]

Figure 1 shows the ash treatment system of a known coal-fired boiler.
The figure is a system diagram showing one embodiment of the present invention. ■... Coal-fired boiler, 2... Dust collector, 3... Fly ash transfer line, 4... Fly ash cyclone separator, 5... 7 Light ash bag filter =, 6...
・Fly ash emergency line, 7.. Bypass line, 8.. Bottom ash transfer line, 9.. Bottom ash cyclone separator, 1o.. Bottom ash bag filter-111.. Bottom ash emergency line,
12... Bypass line, 13... Vacuum pump, 14...
・Fly ash storage silo, 156 ・Bottom ash storage silo, 16...Temperature detector, sub-agent Masafumi Tsukamoto, patent attorney

Claims (1)

[Claims] A first ash transfer line and a second ash transfer line each having a cyclone separator and a bag filter connected in series.
In the ash transfer device, the bag filters of both of the ash transfer lines are connected to a vacuum pump, and the outlet of the cyclone separator of one of the ash transfer lines is connected to the outlet of the cyclone separator of the other ash transfer line.
An ash transfer device comprising an emergency line connected to the vacuum pump via a cyclone separator in the ash transfer line.