JPS6359328A - Method and apparatus for collecting dust by moving bed - Google Patents

Abstract

PURPOSE:To efficiently separate dust contg. combustible components from the gas accompanied therewith by introducing a filter medium trapped with dust into a separator, separating dust and burning it. CONSTITUTION:Dust contg. combustible components is trapped to a filter medium C in moving bed dust collectors 3, 23 and the filter medium C is sent to a separator 6. In the separator 6, the filter medium layer C becomes a fluidized bed by air for separating dust fed under pressure to the inside of a wind box 61, air returned from a cooling layer 7 and dust-laden air sent from an auxiliary dust collector B. Dust is separated from the filter medium C in the fluidized bed and blown up to the inside of a combustion chamber 62. Since the inside of the combustion chamber 62 is kept at high temp. and the combustible components are contained in dust, these are continuously burned during the operation of the dust collector in case of being once ignited by an igniter. In such a way, dust is separated from the filter medium by means of the fluidized bed in the separator 6 and separated dust is burned and therefore the separating efficiency of dust is enhanced.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to a moving bed dust collection method and apparatus, and more particularly to a method and apparatus for separating collected dust from a "j" filter material.

Conventional technology In a moving bed dust collector, suitable materials such as sand, gravel, and ceramic granules are circulated by flowing from top to bottom while forming an overlayer.
The dust containing dust passes through this 'J5 overbrow in a substantially horizontal direction, so that the +j' overhang of dust is collected. Conventionally, the filter material containing dust was passed through a vibrating sieve to remove fine dust.

Problems to be Solved by the Invention According to the above-mentioned conventional techniques, the separation efficiency between dust and the V5 material is poor, and the 'j5 material is damaged or worn due to vibration. In addition, when the high-temperature gas to be processed passes through a moving bed dust collector, the dust and filtration material, which has become high in temperature, can be separated into the dust and the "J5 filtration material" using an airflow separation device such as a fluidized bed. Heat loss due to the separation gas increases, and in order to prevent this, it is necessary to circulate the separation gas, making the device complex.

It is an object of the present invention to solve these problems and provide a mobile eyebrow collecting method and apparatus including a separating method and a separating apparatus which are simple in construction, inexpensive in equipment, and highly efficient.

Means for solving the problem between m points In order to achieve the above object, the first fi? I am
``J'J'' filtration material 4F in which the gas accompanied by dust containing combustible components is passed through the moving layer of the filtration material and the dust is collected.
1 to separate the dust from the V' passing material, and the recycled '
In the method of making a t/6 ring of Jg filter material to the moving bed,
The dust is combusted within the separation hole. In addition, the configuration of tjS2 includes a moving bed dust collector that allows gas accompanied by dust containing combustible components to pass through a moving layer of a filter material to collect dust in excess of t;
The separator that is separated from the overmaterial and burned has a and said part #1.
8! was considered a fluidized bed.

Action Gas accompanied by dust containing combustible components is passed through the moving bed collection Mt'l, the dust is collected by the y'' filter material, this filter material is led to a fluidized bed separator, and the dust is collected by the filter material. The regenerated filter material is recycled to the moving bed dust collector and reused.

EXAMPLE Hereinafter, the present invention will be explained based on an example shown in the drawings. If! f is installed by combining the main dust collector iiA and the auxiliary dust collector B. In the main dust collector A,
The filter material layer is transferred through the first hopper 1 and the second hopper 2! 1I
It is configured to be supplied to the aperture layer 3a of the JN dust collector 3,
Here, the dust containing the combustible components introduced into the IA dust bank 3 is collected.

Below this collection M8!3, there are provided a third hopper 4 and a tjS4 hopper 5, which temporarily store the filter material that has collected the dust and discharge it in fixed amounts.
is connected to the separator 6 via Wl 3 a. The separator 6 connected to the separator 6 has a wind box 61 below through the porous dispersion plate 6a at the bottom, and a fluidized bed above the dispersion plate 6a above. Thus, a combustion chamber 62 containing a layer of filter material C is formed. And the corresponding part I
There is a filter material discharge hole 6 near the interface of the filter material layer on the side wall of the II machine 6.
b is opened.

The outlet 6b is connected to the cooling tank 7 via g6c.

The cooling tank 7 exchanges heat with the cold air sent from the blower 12 through the pipe 13d to lower the f overmaterial layer discharged from the separation fi6 to a predetermined temperature (approximately 400 to 500°C), and It serves to remove dust remaining on the overfill material C. In addition to the cold air pipe 13d, the cooling tank 7 is provided with a purified filter material by a packet conveyor 8.
A pipe 7b for guiding the heat exchanged air and dust to the separator 6 and a fl 7a opened below the interface are connected to return the hot air and dust after heat exchange to the separator 6.

Furthermore, a feed pipe 13e for dust separation air from the heat exchanger 9 is opened in the air box 61 of the separator 6, and a high temperature (approximately 900
°C) gas exhaust pipe 13bfJr is connected, and the limb pipe reaches the heat exchanger@9. An ignition device 1 (not shown) is installed slightly above the interface of the tR roasting chamber 62.

The heat exchanger 9 has a 'jj' branched from the blower 12.
Cold air is sent through 13e and can exchange heat with the high temperature gas. At the gas downstream of the heat exchanger 9,
The cyclone or electric collector rM8!10 is connected to an atmosphere discharge tube 11 provided further downstream thereof.

Next, the auxiliary dust collector B includes a first hopper 21, a second hopper 22, a movable Ni hopper 23, a third hopper 24, a fourth hopper 25, and a baffle plate type dust collector in order from the upstream side to the downstream side as shown in the figure. The tube 2 has a molecule 1fi 26 and a fifth hopper 27.
9a and a packet conveyor 28 are provided, through which the y' material can be circulated. The separator 2G is
As shown in Fig. 2, an inclined baffle plate 26 is provided inside the vertical cylinder 2Ga.
11 are arranged in a zigzag pattern so that the filter medium passes from the top to the bottom and the air passes from the bottom to the top. Then, as in the case of the main dust collector A, the dust in the gas is collected by the moving bed dust collector 23, and the dust is removed by the dust portion GL Iso 26! 5 is configured to be separated from the filtrate.

Atmospheric air is introduced into the dust separator 26 through a pipe 29c,
The structure is such that the dust-containing gas separated from the "j" filtration material is sent to the part B iso 6 of the main dust collector A through a pipe 29b connected to the top.

In the above, the operating mode will be explained 6.g.4.JJ layer dust collection f.
At i3.23, a filter material is constantly sent to the V5 pass/13a and 23a to form a moving 'J53A layer, and dust containing combustible components passing at right angles to the T pass is collected.

Main collection jJ! [f! ! At A, the filter medium C that has collected dust is sent to the separator 6. Further, dust-containing air from the auxiliary dust collector B is also sent into the molecule i iso 6.

In the separator 6, the air for dust separation that is forced into the wind box 61, the return air from the cooling tank 7, and the auxiliary dust collector B
The filter medium C layer becomes a fluidized bed by the dust-containing air from the filter medium, and dust is separated from the filter medium and blown up into the combustion chamber 62.

However, since the temperature inside the chamber is high and the dust contains flammable components, once it is ignited by the igniter, it continues to burn while the dust collector is operating.

The combustion gas reaches the heat exchanger 9 through the pipe 13b at a temperature of about 900°C, and is further sent to the dust collector 10 via the pipe 13ffi, where the ash etc. are removed, and then the gas is discharged from the atmosphere discharge tube 11. released into the atmosphere.

Here, by the cooling tank 7, the minute g! Since the air introduced into I m 6 has a temperature close to the temperature inside the combustion chamber 62, combustion efficiency is increased and heat recovery is performed.
This air also separates dust.

In addition to the above embodiments, the auxiliary dust collector 'VC station B may be omitted, or may be replaced by an electrostatic precipitator or cyclone, and the dust-containing gas G may be transferred. BJWI Collection (Shige 3.23
A more highly purified gas can be obtained by passing it through a cyclone or electric precipitator before passing it through.

Effects of the present invention The method of the present invention allows gas entrained with dust containing combustible components to pass through a moving bed of V5 filter material and collects the dust.
In the method of guiding the filtration material to a separation #litter to separate the dust from the "t" filtration material and circulating the regenerated filtration material to the moving bed, the dust is combusted in the part Ia rock. Therefore, the dust separation efficiency is good, and the filter material is not worn or damaged.

The apparatus of the present invention also includes a dust collector in which the filter material constitutes a moving bed, and a separator that separates dust from the filter material and performs combustion, and the separator is a fluidized bed. Therefore, combustion occurs at the same time as the dust is separated, and the guest and
It has a high separation efficiency from excess materials, and is particularly effective in separating adhesive dust and dust containing sticky components.

[Brief explanation of the drawing]

Figure @1 is a system diagram showing one implementation row of the present invention, and Figure @2 is an R cross-sectional view of a baffle plate type dust separator. l~...Main dust collector, B...Auxiliary dust collector, C...
・Filtering material, G...Dust-containing gas, 3,23...Moving bed dust collector, 6...Min B machine, 7...Cooling tank, 8,28...
・Packet conveyor, 9...Heat exchanger, 10...Dust collector, 11...Atmospheric discharge tube, 26...Dust separator Agent Patent attorney Function Keiichi Figure 1

Claims (2)

[Claims] (1) Gas accompanied by dust containing combustible components is passed through a moving layer of filter material, the filter material that has collected dust is guided to a separator to separate the dust from the filter material, and the recycled filter material is A method for collecting dust in a moving bed, characterized in that in the method of circulating the dust through the moving bed, combustion of the dust is performed in the separator. (2) A moving bed dust collector that filters and collects dust by passing gas accompanied by dust containing flammable components through a moving bed of a filter material, and a separator that separates dust from the filter material and burns it. A moving bed dust collector, characterized in that the separator is a fluidized bed.