JPS588532A - Moving layer filter type dust collecting apparatus - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a moving bed filter type dust aggregation device, and more particularly to a moving bed filter type dust aggregation device suitably used for treating exhaust gas containing tar and dust.

Conventionally, as a dust removal device for combustion exhaust gas containing dust,
Moving bed filters using granular materials such as sand are known. When using such a moving bed filter, there is a problem that dust and tar cannot be separated because particulate matter adheres to the filter. Therefore, only the particulate matter on the gas inflow side with tar adhering to it is burned or gasified to regenerate the particulate matter, but this method has the disadvantage of consuming a large amount of thermal energy.

SUMMARY OF THE INVENTION An object of the present invention is to provide a moving bed filter type dust shaving device that eliminates the drawbacks of the prior art, facilitates the reuse of moving bed granules with tar and dust attached, and consumes less thermal energy. be.

The present invention focuses on the fact that in a moving bed filter device, a large amount of tar and dust adheres to particulate matter on the gas inflow side, making it difficult to separate only the particulate matter to which tar and other adhered particles are present. By separating the particulate matter on the gas inflow side and the gas outflow side, and cleaning the particulate matter with tar etc. attached thereto with a solvent such as kerosene, it is possible to easily recycle the particulate matter.

Hereinafter, the present invention will be explained in more detail with reference to embodiments shown in the drawings. In the figure, the moving bed filter type dust device is
A moving bed filter 11 that allows pyrolysis gas to pass orthogonally through a moving bed of granular materials such as sand and gravel and attaches dust and tar in the gas to the granular materials 1; a partition plate 7 that separates tar and dust-adhered granules on the inflow side and dust-adhered granules on the gas outlet side, and discharge means 18A and 18B for these;
A dust separation device 12 that separates the particulate matter l discharged from the moving bed filter from the dust attached to the particulate matter λ on the gas outflow side, and a particulate matter cleaning device provided at the bottom of the moving bed filter on the gas inflow side. means 21 for supplying kerosene for cleaning to the washer 22 and the washer 22, a device 23 for separating particulates from the cleaning liquid, and a filter for separating dust from the cleaning liquid after removing the particulates (for example, flotation). a storage tank 25 for storing the dust separated by the dust separator 12 and the dust obtained by the filter; ) for recycling the particulate matter to the moving bed filter 11, and inlet and outlet lines 15A and 15B for passing the exhaust gas to the moving bed filter 11, respectively;
It mainly consists of a suction blower 14 and a line 26 for discharging cleaning waste liquid from the dust blower 24. Note that the granular body 1 above the moving layer is supported by louvers 11 on both sides.

In the above configuration, the gas to be treated, for example, pyrolysis gas, is
The air is introduced into the moving qI filter 11 through the pipe 15A, passes through the gaps between the particles 1, and is blown into the heating chamber outside the system by the blower 14 via the pipe 15B. Pyrolysis gas is particulate matter 2
When the gas passes through the air gap, a large amount of tar and dust adheres to the particles on the gas inflow side. Particulate matter with tar and dust attached is moved inside the moving layer filter by a support member (louver) 23.
The particles are divided into two parts by a separator (partition plate) 17 and discharged through particulate discharge devices 18A and 18B, respectively. The particulate matter on the gas inlet side to which a large amount of tar has adhered flows down from the particulate matter discharge device 18A to the cleaning device 22 located below it. Here, the granules with tar adhering to them are washed with kerosene supplied from the kerosene supply machine 21, and the tar is separated and removed from the granules. A particulate matter separator 23 at the bottom of the washing@22 separates tar and collects particulate matter. The collected granules are again supplied into the moving bed 7' filter 11 via the conveyance line 13. tar and das)
Only the dust is removed by a P filter 24 located at the bottom of the gold-containing cleaning liquid particulate separator 23, and the removed dust is stored in a dust storage tank 25. After the dust separation, the remaining cleaning liquid is used as a fuel together with the pyrolysis gas supplied from the blower 14. On the other hand, the particulate matter on the gas outflow side to which less tar is attached flows out from the gas outflow side of the partition plate 17 to the dust separation device 12 through the particulate matter discharge device 18B.
After the dust is separated here, the particulate matter separated by the particulate matter separator 23 is transferred to the transport line 11
1, and the dust is also supplied to the dust storage tank 25. In this embodiment, the temperature of the moving bed filter 11 is maintained above the volatilization temperature of kerosene (220° C. to 260° C.) to volatilize the kerosene adhering to the granules and supply it as fuel together with the pyrolysis gas.

According to the above-mentioned embodiment, tar and dust attached to particles in the moving layer can be easily and efficiently removed without consuming energy such as twisting treatment.

As described above, according to the present invention, since the moving bed filter device separates and cleans only the particulate matter to which a large amount of tar has adhered, it does not require a large amount of thermal energy consumption such as regeneration of the particulate matter by combustion or gasification. It is possible to easily and efficiently regenerate particulate matter without any waste.

[Brief explanation of drawings]

FIG. 1 is a schematic sectional view showing an embodiment of a moving bed filter dust collector for carrying out the present invention. DESCRIPTION OF SYMBOLS 1... Particulate matter, ll... Transfer II (filter), 12... Dust separator, 14... Blower, 16... Support member (roux), 17... Partition plate, 21 ... Kerosene supply machine, 22 ... Cleaning device, 2
3... Particulate matter separator, 24... P filter, 25...
・Dust storage tank. Figure 1 6

Claims (1)

[Claims] (1) In a moving bed filter type dust collecting device in which a gas containing tar and dust is passed through a moving bed of particulate matter and the tar and dust are collected on the particulate matter in the moving bed, the gas The moving bed portion after passing through is separated into a gas inflow side and a gas outflow side by a partition plate, and furthermore, a means for cleaning and regenerating tar and dust-adhered particulates is provided at the moving bed outlet on the gas inflow side. A moving bed filter type dust device. (2. In claim 1, the moving bed filter type dust sludge device is characterized in that the cleaning and regenerating means for tar and dust-adhering particulate matter is a cleaning device using a petroleum solvent.