KR20060023209A - The coke filter for the removal of dust - Google Patents

Abstract

 The present invention relates to a coke filter for dust removal, and in particular, provided with a multi-stage filter filled with coke generated as a by-product from an ironworks to pass the exhaust gas to efficiently and economically remove the dust present in the exhaust gas. It relates to a dust removal coke filter.

According to the present invention, there is provided a configuration for continuously supplying and discharging inexpensive powdered coke that performs a filtering role from top to bottom, and according to this configuration, a simple and inexpensive filter that does not need to be replaced periodically is provided. have. In addition, by constructing the powder coke filter in two or more stages, the filter's filtration capacity is improved, and the structure that discharges the powder coke continuously provides a safe and efficient filter that does not generate differential pressure in the filter due to dust collection. It is effective.

Coke, filter, dust

Description

Dust Coke Filter {THE COKE FILTER FOR THE REMOVAL OF DUST}

1 is a schematic diagram for showing a preferred embodiment according to the present invention.

1: coke 2,3,4: coke inlet

10: first stage filter 20: second stage filter

30: third stage filter 100: filter unit

The present invention relates to a coke filter for dust removal, and in particular, provided with a multi-stage filter filled with coke generated as a by-product from an ironworks to pass the exhaust gas to efficiently and economically remove the dust present in the exhaust gas. It relates to a dust removal coke filter.

In general, the most widely used method of removing dust contained in the exhaust gas is a method using an electric dust collector, a filter dust collector, and the like, and these dust collectors are variously used in industrial sites. The dust can be removed up to 99%. [W. Strauss, "Industrial Gas Cleaning" Pergamon Press, 1975]                         

However, in the case of a large amount of fine dust in the electrostatic precipitator, there is a limit in lowering the concentration of dust discharged from the rear stage, so that dust of 20 to 50 mg / Sm ³ or more is normally discharged, and incinerators, etc. The filter dust collector is preferred due to regeneration problems.

In the case of the filter dust collector, the dust removal efficiency is also good, and the dust emission concentration of the rear stage may satisfy up to 10 mg / Sm ³ or less depending on the use conditions, but there is a problem in that the filter cloth needs to be replaced periodically. There is a disadvantage of being expensive.

On the other hand, since it is well known that carbon-type catalysts, such as activated carbon, can adsorb and remove SO ₂ at low temperatures, desulfurization and denitrification processes using granular activated carbon are already commercialized. Japanese Patent Laid-Open No. 1993-105415 Disclosed is a method for producing activated carbon used herein.

In the case of using such granular activated carbon, it is known that the activated carbon layer acts as a filter in addition to the SOx and NOx in the exhaust gas, so that dust can be removed, but the activated carbon used here has a disadvantage of being very expensive.

     The present invention has been made to solve the problems as described above, the object of the present invention is to use the particulate coke generated as a by-product in the steel mill as a filter to remove dust present in the exhaust gas economically and efficiently. It is to provide a device.

It is another object of the present invention to provide a device capable of improving the filtration capacity of the filter by configuring the coke filter in at least two or more stages.

Another object of the present invention will be described in more detail in the configuration and operation to be described later.

The coke filter for dust removal according to the present invention for achieving the above object, in the filter device for removing dust in the exhaust gas, using the granular powder coke as a filler of the filter, the exhaust gas is filled in the filter filled with the powder coke By passing it is characterized in that the dust in the exhaust gas is removed.

Preferably, the filled coke is continuously injected from the outside and discharged to the outside constantly, so that the differential pressure caused by dust collection is suppressed, and the size of the filled coke is preferably within 5 to 40 mm. do.

In addition, if a filter filled with powdered coke is composed of at least two or more stages, and the speed of the powdered coke discharged from the filter of each stage is different from each other, the dust in the exhaust gas collected in the powdered coke particles is exhausted. It is configured to prevent some broken particles from being discharged into the dust in the flue-gas due to the swept out or the friction between coke.

In particular, the coke discharge rate of the foremost filter in which dust is most collected on the side of the exhaust gas input among the plurality of filters may be configured to discharge the dust coke collected quickly to the outside quickly.

Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings, and in the following description of the present invention, specific descriptions of related well-known functions or configurations may unnecessarily obscure the subject matter of the present invention. If so, the detailed description thereof will be omitted.

The following terms are terms set in consideration of functions in the present invention, which may vary depending on the intention or custom of the producer, and their definitions should be made based on the contents throughout the specification.

1 is a schematic diagram showing a filter device 100 of a coke filter for dust removal according to the present invention.

As shown in FIG. 1, the filter device 100 is configured such that the exhaust gas is introduced from the left side and discharged to the right after passing through the first stage filter 10, the second stage filter 20, and the third stage filter 30. .

The granular powder coke 1 is injected into the coke inlets 2, 3, and 4 from the upper side of the filter device 100 to filter the filters 10, 20, and 30 at each stage. It is configured to fall gravity at a constant speed so as to be discharged downward after coarse, and the coke inlet (2), (3), (4) and the powder coke (1) introduced between the filter (10), (20), (30) Control valves (not shown) for adjusting the amount of each is provided, and control valves for adjusting the amount of powder coke (1) discharged to the lower portion of each filter (10), (20), (30) ( Not shown).

The powdered coke (1) filled in the filters (10), (20), and (30) is filled with a particle size of 10 to 16 mm within the range of approximately 5 to 40 mm among the powdered coke produced as a by-product at the steel mill. will be.

In addition, it is the filter filled with the granular powdered coke 1 so that the powdered coke 1 in the filter 10, 20, 30 is continuously introduced and discharged by using a control means such as a control valve. When the exhaust gas is passed through (10), (20), and (30), dust in the exhaust gas is collected by the powder coke 1 and the differential pressure of the filter rises, so that the differential pressure is kept constant so that the filter device 100 This is to make the operation smooth.

In addition, the filter 10, 20, 30 is composed of a three-stage filter in the present embodiment, the overlapping of the filter in multiple stages is a configuration for further improving the filtration capacity of the exhaust gas, The control means can be used to set different discharge rates of the pulverized coke 1 in the filters 10, 20 and 30, which are collected in the coke particles as the pulverized coke 1 moves in the filter. Dust in the flue gas is swept out of the flue gas stream and discharged to some extent, or some broken particles may be discharged in the form of dust in the flue gas due to friction between cokes.

That is, the foremost filter 10 that collects a lot of dust in the exhaust gas sets the discharge speed of the coke 1 quickly, and the rear filters 20 and 30 are discharged compared to the foremost filter 10. It is preferable that the speed is set to be slow, and the dust coke discharged to the outside contains a lot of dust, so that the dust can be shaken off using a screen and reused.

Example 1                     

The overall size of the coke filter was 700 (w) x 700 (h) x 300 (length) mm. The exhaust gas passing through the filter introduced some of the exhaust gas generated from the sintering plant using a fan, and the flow rate of the exhaust gas was 1000 Nm ³ / hr.

Table 1 shows the outlet concentration and removal efficiency according to the dust inlet concentration.

Number of measurements Dust concentration (mg / Sm3) Removal efficiency (%) Inlet concentration Outlet concentration One 251 5.0 98.0 2 272 4.3 98.4 3 967 7.5 99.2

When looking at the dust concentration and removal efficiency data shown in Table 1 above, it can be seen that the coke filter according to the present invention has an excellent effect of removing most of the dust in the flue gas. It can be seen that the filter can be constructed at low cost.

Although the preferred embodiments of the present invention have been described in detail as described above, those skilled in the art will be able to modify or change the present invention without departing from the spirit and scope of the present invention. It will be appreciated that the true technical protection scope of the present invention should be determined by the claims.

According to the present invention, there is provided a configuration for continuously supplying and discharging inexpensive powdered coke, which performs a filtering role, from top to bottom, and according to this configuration, an effect of providing a simple and inexpensive filter that does not need to be replaced periodically. There is.

In addition, the filtration capacity of the filter is improved by constructing the powder coke filter in two or more stages, and the safety and efficient filter which does not generate the differential pressure in the filter by dust collection is provided by the structure which discharges the powder coke continuously. It is effective.

Claims (5)

       In the filter device for removing dust in the exhaust gas, The particulate coke filter is used as a filler of the filter, and dust in the exhaust gas is removed by passing the exhaust gas through the filter filled with the powder coke. The method of claim 1, The filled dust coke is continuously injected from the outside and discharged to the outside constantly, dust removal coke filter, characterized in that to suppress the occurrence of the differential pressure due to dust collection. The method of claim 1, The coke filter for dust removal, characterized in that the size of the filled coke is within 5mm to 40mm. The method of claim 1, A coke filter for dust removal, characterized in that the filter comprises at least two or more stages. The method of claim 4, wherein The coke for dust removal, characterized in that the coke discharge rate of the filter located in the most front of the plurality of stages of the filter is the fastest to discharge the coke in the front filter to collect a lot of dust to the outside quickly filter.

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