KR20110029393A - Regeneration apparatus and its method for filtration system with ceramic candle filters - Google Patents

Abstract

PURPOSE: A dust removing device of a dust collection system including a ceramic candle filter, and a dust removing method using thereof are provided to reduce the load on the filter by periodically performing a dust removing process. CONSTITUTION: A dust removing device of a dust collection system comprises the following: a dust collection chamber(11) and a purified gas chamber(12) divided by a partition wall(31); plural ceramic candle filters(13) installed in the inside of the dust collection chamber in filter bundles(14); a dust removing gas supplier spraying high pressure dust removing gas to the filter bundles to remove a dust layer; a branched pipe outlet transferring clean synthetic gas filtered by the ceramic candle filters to the purified gas chamber; and a valve/pneumatic piston(23) for opening and closing the branched pipe outlet.

Description

Reduction apparatus of dust collection system with ceramic candle filter and its method {Regeneration apparatus and its method for filtration system with ceramic candle filters}

The present invention relates to a dust collecting apparatus and method for collecting a dust collecting system equipped with a ceramic candle filter, and more particularly, to a dust collecting system for removing particulate matter such as dust contained in a large amount of syngas produced by coal gasification. A ceramic candle filter is provided to supply back-pulsing gas to each of the filter bundles to remove dusts from the filter surface attached to the plurality of filter bundles consisting of a plurality of ceramic candle filters inside the dust collecting chamber. The present invention relates to a dust collecting device and a method thereof.

In the power generation process using high temperature and high pressure synthesis gas such as coal gasification combined cycle (IGCC), various problems are caused by particulate matter such as dust contained in the synthesis gas. Because it contains a large amount of fine particulate matter, it may shorten the life of sub-units due to corrosion and erosion of equipment such as desulfurization facilities or turbines located at the rear of IGCC dust collector and stop the coal gasification combined cycle system. There is a need for a dust collection system capable of reducing the concentration of particulate matter to less than 1 ppm.

Representative examples of large-capacity dust collectors applied to commercial IGCC power generation processes are dust collectors installed in Pinon Pine, Wilsonville, and Buggenum in the United States. Hundreds of ceramic candle filters are installed, and a plurality of filters are bundled to facilitate collection and dedusting of these individual filters.

In particular, the Dutch dust collector of Buggenum has 18 filter bundles of 48 filters installed in parallel, and a total of 864 ceramic candle filters are installed. Each filter bundle is equipped with a large venturi. By supplying, it is possible to smoothly filter out dust.

However, when the venturi-based filter is exhausted, the reverse injection gas of too high pressure is used, so the impact force applied to the filter by the exhaustion acts so strongly that it causes a high fatigue to the filter, thereby shortening the filter life. .

Accordingly, in order to lower the impact force applied to the filter by exhaustion, it is necessary to develop a new type of dust removal apparatus and method.

In order to solve the above and the conventional problems, the present invention is devised, the present invention can be used to extend the filter life by reducing the anti-injection pressure to reduce the impact force applied to the filter by exhaustion to reduce the fatigue accumulated during the exhaustion It is an object of the present invention to provide a dust collecting device and a method for collecting a dust collecting system equipped with a ceramic candle filter.

In the dust collection method of the dust collecting system with a ceramic candle filter according to the present invention for achieving the above object, a hopper at the bottom to collect the particulate matter contained in the synthesis gas in the power generation process using the high-pressure synthesis gas A dust collecting housing provided, a partition installed in the dust collecting housing and partitioned into a lower dust collecting chamber and an upper clean gas chamber, a plurality of ceramic candle filters installed at a bottom of the partition to pass the filtered gas to the clean gas chamber, In the dust collection method of the dust collecting system having a ceramic candle filter comprising a filter bundle of the ceramic candle filters bundled into a plurality, a dust extraction device which is installed in a clean gas chamber to supply a reverse injection gas for the dust of the filter bundle. Smooth collection of particulate matter on the surface of the ceramic candle filter of the filter bundle It comprises a smooth exhaustion step of the particulate layer formed attached to the filter bundles.

Here, in the dust collecting step, the synthesis gas having the particulate matter suspended through all the filter bundles is collected through the filter surface, and then the clean synthesis gas is discharged through the branch pipe outlets of the exhaust gas supply unit installed at the opening surface of each filter bundle. After collecting in the clean gas chamber of the dust collecting housing, it is discharged from the dust collecting housing to the lower process.

In the exhausting step, a branch pipe outlet of the exhaust gas supply unit installed at an opening surface of one of the filter bundles randomly selected from all the filter bundles is blocked, and a high-pressure exhaust gas is optionally applied to the opening surface of one of the filter bundles. By removing the dust layer attached to the filter bundle from the filter surface by supplying it to the filter bundle through an installed dedusting gas supply unit, and once completed for one selected filter bundle, the branch pipe outlet of the dust removal gas supply unit installed at the opening of the filter bundle. After opening, the same dedusting process is repeated on the other filter bundles.

As described above, the dust collecting apparatus and method of the dust collecting system equipped with the ceramic candle filter according to the present invention, the high-pressure dust exhaust gas filter in the state of blocking the outlet of the exhaust gas supply unit provided on the opening surface of each filter bundle By back-injection, the dust on the surface of the filter is sufficiently reduced even with a low pressure exhaust gas compared to the case where the exhaust gas is supplied to the filter bundle while the outlet of the filter bundle is open as in the conventional dust extraction method using a venturi. Since it can be removed, it is possible to extend the life of the filter by reducing the fatigue accumulated in the filter by the dedusting step is performed periodically.

Hereinafter, preferred embodiments of the present invention will be described with reference to the accompanying drawings.

The dust collecting system 10 equipped with the dust collecting device 20 according to the present invention is shown in FIGS. While divided into a chamber 12, a plurality of ceramic candle filters 13 are installed in the dust collecting chamber 11, and are composed of a plurality of filter bundles 14, and a dust collecting chamber is disposed on an upper side of the dust collecting chamber 11. A dust gas inlet 15 for introducing a synthesis gas containing dust is installed at 11, and a clean gas outlet 16 for flowing clean syngas from which dust is removed from the clean gas chamber 12 is discharged. It is installed, the hopper 17 for storing the dust settled by gravity from the filter bundle 14 is connected to the outside air through the dust discharge port 18 is installed on the lower side of the dust collecting chamber 11 to open and close Removal of Dust Collecting System with Ceramic Candle Filter In the vacuum device, in order to remove the dust layer trapped in the filter bundle 14, an opening surface of the filter bundle 14 is provided with a degassing gas supply unit 21 for injecting a high pressure degassing gas. The supply part 21 is provided with a branch pipe outlet 22 for transferring the clean syngas collected through the ceramic candle filter 13 to the clean gas chamber 12, and opens and closes the branch pipe outlet 21. A valve / pneumatic piston (23) is installed to operate outside the clean gas chamber (12), and a solenoid for supplying the high pressure degassing gas to the filter bundle (14) through the dedusting gas reservoir (25) in a pulsed manner. The valve 24 is configured to be provided between the high pressure dedusting gas storage tank 25 and the pipe 26.

The dust removal method of the present invention using the dust collecting system having the dust removal device 20 as described above is made as follows.

Synthetic gas containing particulate matter, which is a particulate matter, is introduced into the dust collecting chamber 11 through the dust gas inlet 15, and then dusts suspended in the dust collecting chamber 11 are transferred toward the ceramic candle filters 13. Dust adheres to the surface of the filter to form a dust layer, and the clean gas chamber passes through the dedusting gas supply unit 210 and the branch pipe outlet 22 through which the clean syngas from which dust penetrates through the pores of the ceramic candle filters 13 is removed. Are transferred to 12.

The clean syngas discharged through all the branch pipe outlets 22 through all the filter bundles 14 collects in the clean gas chamber 12 and then exits the clean gas outlet 16 through the dust collecting system 10. As the dust collection process is performed in this manner, after the pressure loss at both ends of the filter reaches a specific pressure loss or after a specific operation time, the thick dust layer formed on the surface of the ceramic candle filter 13 causes the operating pressure loss of the dust collecting system 10 to be reduced. The dust layer on the surface of the ceramic candle filter 13 should be removed.

In order to remove the dust layer formed on the surface of the ceramic candle filter 13, a dedusting process must be performed on each of the filter bundles 14, and the order of the degassing process is performed as shown in FIG.

When clean syngas is discharged through the branch pipe outlet 22, when the differential pressure between the dust collecting chamber 11 and the clean gas chamber 12 reaches a specific value, the first filter bundle 14 is connected to the first filter bundle 14. The branch pipe outlet 22 is closed, and the solenoid valve 24 connected to the first filter bundle 14 for the exhaust gas stored in the exhaust gas storage tank 25 at a pressure of 1 to 5 bar higher than the operating pressure is operated for 50 to 300 msec. During the opening and closing, the solenoid valve 24 and the degassing gas supply part 21 are supplied to the first filter bundle 14 so that the first filter bundle 14 is exhausted.

The first branch pipe outlet 22 is kept closed for 0 to 10 sec during which exhaustion occurs, and after a predetermined time has elapsed, the branch pipe outlet 22 connected to the first filter bundle 14 is opened, and 0 After ~ 10 sec time has elapsed, the dedusting operation for the first filter bundle 14 is repeated while closing the branch pipe outlet 22 connected to the second filter bundle 14.

As such, when the dust removal operation is completed up to the last filter bundle 14, the dust removal process of the dust collecting system 10 is completed.

That is, the dust removal method of the present invention is systematically described again with reference to FIG. And a dust collecting chamber 11 installed at a lower portion of the dust collecting system and having a dust gas inlet 15 for introducing a synthetic gas containing dust, an upper clean gas chamber 12, and installed at the dust collecting chamber 11. A plurality of ceramic candle filters 13 and the plurality of ceramic candle filters 13 are bundled in a specific number, and are installed in the clean gas chamber 12 to inject dedusting gas into the filter bundle 14. A dust removal device 20 composed of a exhaust gas supply unit 21, a branch pipe outlet 22, a valve-pneumatic piston 23, a solenoid valve 24, a exhaust gas storage tank 25 and pipes 26 connecting them. Consists of filter bundles (14) In the dust extraction operation method of the dust collecting system 10 for removing the dust layer, the dust particles are transferred to the filter bundle 14 composed of groups of ceramic candle filters 13 through the dust gas inlet 15. A dust collecting step (S1) in which a dust layer consisting of the filter is formed;

When the differential pressure of the dust collecting system 10 reaches a specific level during the dust collecting step S1, the branch pipe outlet 22 connected to the dust exhaust gas supply unit 21 installed on the opening of the first filter bundle 14 is closed. Filter bundle gas flow blocking step (S2) for blocking the flow of gas through the second filter bundle (14);

After the filter bundle gas flow blocking step (S2) is completed, the first filter bundle by injecting the dedusting gas through the degassing gas storage tank 25, the solenoid valve 24 and the degassing gas supply unit 21 in which the high-pressure degassing gas is stored. A dust layer removing step (S3) of removing the dust layer formed at 14;

After the specific time has elapsed in the step of removing the dust layer (S3), the filter bundle gas flow resume step (S4) of reopening the branch pipe outlet 22 to resume the gas flow to the first filter bundle 14 and ;

After the filter bundle gas flow resumption step (S4) is completed, and then comprises a dust collection resume step (S5) for circulating in the same manner as in the first filter bundle 14 sequentially for all the filter bundles (14) It is.

The start of the filter bundle gas flow blocking step S2 is performed when the differential pressure by the filter with dust is 1000 to 3000 mmH ₂ O when the surface of the ceramic candle filter 13 has a filtration rate of 1 to 3 cm / s. The gas pressure of the dedusting gas storage tank 25 is operated to be 1 to 5 bar higher than the operating pressure of the dust collecting system 10.

After the branch pipe outlet 22 is opened and the filter bundle gas flow resumption step S4 is completed, the time interval between the filter bundle gas flow blocking step S2 of the next filter bundle 14 is 0 to 10 sec. It is supposed to be maintained.

In addition, in this invention, dust collection and dust removal are operated in the always open state, without closing the said branch pipe discharge port 22. As shown in FIG.

In addition, the above-mentioned example is only an example to demonstrate this invention. Therefore, it is obvious that the ordinary skilled in the art to which the present invention pertains uses the partial change with reference to the detailed description.

1 is a schematic diagram of a dust collecting system having a dust extraction device according to the present invention,

Figure 2 (A) and (B) is an enlarged plane and side view schematic view of the dust removal apparatus that is the main part of the present invention,

3 is a flowchart of a dust removal method according to the present invention.

-Explanation of symbols for the main parts of the drawings-

10: dust collecting system, 11: dust collecting chamber,

12: clean gas chamber, 13: ceramic candle filter,

14: bundle of filters, 15: dust gas inlet,

16: clean gas outlet, 17: hopper,

18: dust outlet, 20: dust exhaust device,

21: exhaust gas supply unit, 22: branch pipe outlet,

23: valve / pneumatic piston, 24: solenoid valve,

25: dedusted gas storage tank, 26: pipe,

31: bulkhead.

Claims (8)

As the partition wall 31 is divided into the lower dust collecting chamber 11 and the upper clean gas chamber 12, a plurality of ceramic candle filters 13 are arranged in the dust collecting chamber 11. The dust collecting inlet 15 is provided at the upper side of the dust collecting chamber 11 for introducing a synthetic gas containing dust into the dust collecting chamber 11, and is provided from the clean gas chamber 12. A clean gas outlet 16 is installed to allow the clean syngas from which dust has been removed, and a hopper 17 for storing gravity sedimented dust that has been removed from the filter bundle 14 is provided in the dust collecting chamber 11. In the dust collecting device of the dust collecting system having a ceramic candle filter is connected to the outside air through the dust outlet 18 is installed and opened on the lower side, In order to remove the dust layer trapped in the filter bundle 14, an opening surface of the filter bundle 14 is provided with a degassing gas supply unit 21 for injecting high pressure degassing gas, and the dedusting gas supply unit 21 is provided. A branch pipe outlet 22 is installed to transfer the clean syngas collected by the ceramic candle filter 13 to the clean gas chamber 12, and a valve / pneumatic valve for opening and closing the branch pipe outlet 21. The piston 23 is installed to operate outside the clean gas chamber 12, and the solenoid valve 24 for supplying the high pressure degassing gas to the filter bundle 14 through the degassing gas storage tank 25 in a pulse manner is provided. Dust collecting device of a dust collecting system with a ceramic candle filter, characterized in that is installed between the high-pressure degassing gas storage tank 25 and the pipe (26). In the power generation process using the synthesis gas of high temperature and high pressure, a dust collecting system 10 provided to collect particulate matter, which is fine dust contained in the synthesis gas, and introduced into the dust collecting system under the dust collecting system to introduce dust containing therein. A specific number of the ceramic candle filter 13 and the ceramic candle filter 13 installed in the dust collecting chamber 11, the upper clean gas chamber 12, and the dust collecting chamber 11 having the dust gas inlet 15 for The filter bundle 14 which is bundled together with the dust, the dust removal gas supply part 21 installed in the clean gas chamber 12 to inject the dust removal gas into the filter bundle 14, the branch pipe outlet 22, the valve-pneumatic piston ( 23, a dust collecting device 20 composed of a solenoid valve 24, a degassing gas storage tank 25 and pipes connecting them, to collect dust to remove the dust layer attached to the filter bundles 14. In the dust removal operation of the system (10). Standing, A dust collecting step (S1) through which the dust gas inlet 15 is transferred to a filter bundle 14 composed of groups of ceramic candle filters 13 to form a dust layer composed of dust particles; When the differential pressure of the dust collecting system 10 reaches a specific level during the dust collecting step S1, the branch pipe outlet 22 connected to the dust exhaust gas supply unit 21 installed on the opening of the first filter bundle 14 is closed. Filter bundle gas flow blocking step (S2) for blocking the flow of gas through the second filter bundle (14); After the filter bundle gas flow blocking step (S2) is completed, the first filter bundle by injecting the dedusting gas through the degassing gas storage tank 25, the solenoid valve 24 and the degassing gas supply unit 21, the high-pressure degassing gas is stored. A dust layer removing step (S3) of removing the dust layer formed at 14; After the specific time has elapsed in the step of removing the dust layer (S3), the filter bundle gas flow resume step (S4) of reopening the branch pipe outlet 22 to resume the gas flow to the first filter bundle 14 and ; After the filter bundle gas flow resumption step (S4) is completed, it comprises a dust collection resumption step (S5) to circulate in the same manner as in the first filter bundle 14 sequentially for all the filter bundles (14) afterwards Dust collecting method of a dust collecting system having a ceramic candle filter, characterized in that. 3. The method of claim 2, The start of the filter bundle gas flow blocking step (S2) is performed when the differential pressure by the filter with dust is 1000 to 3000 mmH ₂ O when the filter surface filtration rate is 1 to 3 cm / s. Dust collecting method of a dust collecting system having a ceramic candle filter. 3. The method of claim 2, And a gas pressure of the dust collecting gas storage tank is operated at a pressure of 1 to 5 bar higher than an operating pressure of the dust collecting system. 3. The method of claim 2, The method of dust collection system with a ceramic candle filter, characterized in that for operating the time required to open and close the solenoid valve 21 to 50 ~ 300 msec. 3. The method of claim 2, And a time required for closing and opening the branch pipe outlet (22) to drive the dust collection system with a ceramic candle filter, characterized in that for operating from 0 to 10 sec. 3. The method of claim 2, After opening the branch pipe outlet 22 to complete the filter bundle gas flow resumption step (S4), to maintain the time interval between the gas flow blocking step (S2) of the next filter bundle 14 to 0 ~ 10 sec Dust collecting method of a dust collecting system having a ceramic candle filter, characterized in that. 3. The method of claim 2, The dust collecting method of the dust collecting system with a ceramic candle filter, characterized in that the dust collecting and dedusting operation in the always open state without closing the branch pipe outlet (22).

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