KR101161547B1 - Ash collecting apparatus of a gasification melting furnace system - Google Patents

Abstract

The present invention provides an exhaust chamber (4) and an intake chamber (3) in the upper part of the sealed housing (2) in order to remove dust contained in the high-temperature, high-pressure synthesis gas (11) discharged from the gasification furnace. In the dust collecting apparatus of the gasification furnace system which is equipped with the plurality of dust collecting filters 5 so that it may be suspended by the isolation | separation fixing plate 6 provided so that it may divide into the said furnace, each said dust collecting filter 5 side in the said exhaust chamber 4 may be Closed partition plate 13 provided to close each other, a plurality of section exhaust chamber (4-1) formed inside the closed partition plate 13 and the upper portion formed on the upper side of the closed partition plate (13) A plurality of connection pipes 14 provided to connect the exhaust chamber 4-2 so as to communicate with each other, and a flow rate for detecting a flow rate of the syngas provided on the connection pipes 14 and flowing through the inside; The sensing means 15 and the connection pipe 14 are respectively provided on Control unit 17 to block the pipe blocking means 16 to be opened and closed and the corresponding pipe blocking means 16 at the time when the flow rate of the synthesis gas detected by the flow rate sensing means 15 is changed to increase. It characterized by including).

Therefore, the dust collection filter is prevented from being carried over to the subsequent process as it is, through the broken dust collecting filter, so that a stable process of the subsequent process can be performed, and if a specific dust collecting filter is broken, the entire apparatus and process are not stopped. Since the normal operation is continuously performed using the remaining dust collecting filters, it is possible to minimize the enormous loss caused by the device and the process stop.

Gasification, Melting Furnace, Exhaust, Synthesis, Gas, Dust, Dust Collection, Dust Removal, Collection, Filter, Back Wash, Venturi, Breakage, Blocking

Description

ASH COLLECTING APPARATUS OF A GASIFICATION MELTING FURNACE SYSTEM}

1 is a schematic view showing a dust collecting device of a conventional gasification furnace system,

Figure 2 is a schematic diagram showing the main part of the dust collecting device of the gasification furnace system according to the present invention,

Figure 3 is a schematic perspective view of the main portion of the dust collecting device of the gasification furnace system according to the present invention.

<Description of the symbols for the main parts of the drawings>

1: gas inlet 2: housing

3: intake chamber 4: exhaust chamber

4-1: Section exhaust chamber 4-2: Upper exhaust chamber

5: dust collection filter 6: isolation fixing plate

7: Venturi 8: Nitrogen gas piping for backwash

9 gas outlet 10 dust outlet

11: dust containing syngas 12: dust removing syngas

13: closed partition plate 14: connection piping

15: flow rate detection means 16: pipe blocking means

17: control unit

The present invention relates to a dust collecting device of a gasification furnace system, more specifically, a specific dust collecting filter of the plurality of dust collecting filters provided to collect and remove dust contained in the synthesis gas of high temperature, high pressure state is immediately detected By closing the dust collecting filter side, it is possible to smoothly prevent the dust from being carried over to the subsequent process through the broken dust collecting filter and inhibit the stable process of the subsequent process, and also to remove the remaining dust collecting filters other than the broken dust collecting filter. The present invention relates to a dust collecting device for a gasification furnace system, by continuing a normal operation by using the same, thereby minimizing enormous losses due to an apparatus and a process stop.

In general, in a gasification furnace system, when gasification reactions of flammable wastes having various physical properties and properties are carried out in a gasification furnace, high-temperature, high-pressure dust-containing syngas (exhaust gas) is discharged. After the dust is removed smoothly, the syngas is supplied to a subsequent process to be used as power generation or chemical fuel.

At this time, a dust collecting device is used to collect and remove dust of particulate matter contained in the syngas discharged from the gasification furnace, which is shown in FIG.

The dust collecting device has a cylindrical housing (2) closed to form a predetermined space therein, and the inside of the housing (2) is provided with an upper space portion by an isolation fixing plate (6) provided in a horizontal direction on the upper side. The lower space is divided into an intake chamber 3 through which the dust-containing syngas 11 is sucked, and the upper space is an exhaust chamber through which the syngas 12 from which dust is removed is passed ( 4) becomes.

The gas inlet 1 through which the synthesis gas 11 containing dust flows is formed on the side wall of the housing 2 at the lower side of the intake chamber 3, and dust is formed at the upper end of the exhaust chamber 4. A gas outlet 9 through which the removed syngas 12 flows out in a subsequent process is formed.

In addition, a plurality of dust collecting filters 5 are provided in the vertical direction in the intake chamber 3 so as to be suspended and fixed to the above-described isolation fixing plate 6 in such a manner as to partially penetrate the dust collecting filter 5. Are provided to be spaced apart from each other at regular intervals along the circumferential direction, and of course, these dust collecting filters 5 are collected to filter the dust contained in the synthetic gas 11 to pass through.

Here, as the dust collecting filter 5, a ceramic filter or a metal sintering filter having a large number of pores therein is mainly used, and a metal filter made of metal fiber is also used.

Furthermore, for each dust collecting filter 5 of the part which protrudes slightly on the upper surface of the isolation fixing plate 6, venturis 7 are provided one by one as a means for removing and removing the dusts attached to the collection. These venturis 7 are connected to the backwash nitrogen gas pipes 8 so that the nitrogen gas supplied from the backwash nitrogen gas pipes 8 is injected downward to the corresponding dust collecting filter 5. By doing so, the dust attached to the dust collecting filter 5 is eliminated to be removed.

In addition, a dust discharge port 10 is formed at the lower end of the above-described intake chamber 3 so that dust, which is dropped from the dust collecting filters 5 and dropped by the above-described venturi 7, is discharged to the outside. have.

Therefore, the action is that the high-temperature, high-pressure dust-containing syngas 11 discharged from the outlet of the gasification furnace (not shown) is provided through the gas inlet 1 formed at the lower side of the housing 2. (3) It is introduced into the inside, the dust-containing syngas 11 introduced to the lower side of the intake chamber (3) forms an ascending flow, that is, an upward flow, thereby the dust-containing syngas 11 rises While passing through the plurality of dust collecting filters (5) provided in the vertical direction from the lower side to the upper side, in this process the dust contained in the syngas 11 is collected by the dust collecting filters (5) to be removed The synthetic gas 12 from which dust is removed is discharged into the exhaust chamber 4 through the upper end of the dust collecting filter 5, and the synthesis gas 12 introduced into the exhaust chamber 4 is continuously continued. To the gas outlet 9 at the upper end of the exhaust chamber 4. It will flow through and be transferred to subsequent processes.

Then, as the dust collection process as described above, the collected dust is attached on the dust collecting filters (5), the dust collecting ability is gradually reduced by the attached dust over time, a certain time Every time dust attached to the dust collecting filters 5 is dropped and removed.

To this end, nitrogen gas is injected to the one or two dust collecting filters 5 while the dust collecting process is in progress so as to descend from the corresponding venturi 7 (the reverse of the flow of the synthesis gas 11) to collect the dust collecting filters. The dust attached to the (5) is periodically removed, thereby keeping the dust collecting ability of the dust collecting filters (5) continuously good, of course, the nitrogen gas injected from the venturi (7) is backwash nitrogen It is supplied from the gas pipe 8.

That is, for example, if the back washing is performed on the two dust collecting filters 5, the washing is performed as a whole through a cyclic cycle method in which the back washing is performed on the next two dust collecting filters 5 after a predetermined time. Will be.

In addition, the dusts dropped from the dust collecting filters 5 through this cleaning are dropped and discharged to the outside through the dust discharge port 10 formed at the lower end of the intake chamber 3.

However, the above conventional dust collecting device has the following problems.

That is, since the dust collecting filters 5 are in direct contact with the synthesis gas 11 at high temperature and high pressure, the dust collecting filters 5 are easily damaged according to the high temperature and high pressure state of the synthesis gas 11. That is, the high temperature state of the synthesis gas 11 exerts thermal damage and thermal fatigue on the dust collecting filter 5, and the high pressure state of the synthesis gas 11 exerts mechanical damage on the dust collecting filter 5 to wear out. And the like, thereby easily damaging the dust collecting filters 5, and in particular, the dust collecting filters 5 positioned so as to be close to the gas inlet 1 into which the syngas 11 flows can be more easily broken. do.

In addition, the dust collecting filters 5 are thermally damaged even by the contact of cold nitrogen gas injected for backwashing, and are further damaged.

For this reason, when a specific dust collecting filter 5 is broken during operation, the dust in the syngas 11 passing through the damaged dust collecting filter 5 is not dusted and is passed through as it is and carried forward to a subsequent process. The dust carried over in this way greatly damages the stability and efficiency of the subsequent process, such as damaging the equipment of the subsequent process.

That is, when a power generation gas turbine (turbine) is provided as a subsequent process, the dust carried over wears and destroys the blade of the gas turbine, thereby causing a situation in which electricity supply is stopped.

In addition, when a high-temperature dry desulfurization apparatus for removing sulfur components in the synthesis gas is provided as a subsequent process, the carryover dust is deposited on the catalyst layer therein to greatly reduce the conversion efficiency.

Therefore, if a specific dust collecting filter 5 of the plurality of dust collecting filters 5 provided during operation is damaged, the corresponding dust collecting filter 5 that is broken must be replaced immediately, but the specific dust collecting filter ( 5) It is not only possible to find out, but even if found, the replacement requires the shutdown and maintenance of the entire process and equipment including the subsequent process, which leads to enormous losses.

The present invention was devised to solve the above-mentioned problems, and immediately detects a dust collecting filter that is broken during operation, and individually blocks the dust collecting filter side, thereby preventing dust from being carried over to a subsequent process. It is an object of the present invention to provide a dust collecting device of a gasification furnace system that can keep the entire process and the device from being stopped by continuously operating normal dust collecting filters except the dust collecting filter.

The dust collecting device of the gasification melting furnace system of the present invention for achieving the above object, the inside of the sealed housing (2) to remove dust contained in the high-temperature, high-pressure synthesis gas 11 discharged from the gasification melting furnace In the dust collecting apparatus of the gasification furnace system which is equipped with the plurality of dust collecting filters 5 so that it may be suspended in the isolation | separation fixing plate 6 provided so that it may divide into the upper exhaust chamber 4 and the lower intake chamber 3, A closing partition plate 13 provided to close each dust collecting filter 5 side in the chamber 4 and a plurality of section exhaust chambers 4-1 formed inside the closing partition plate 13. ) And a plurality of connection pipes 14 provided to connect the upper exhaust chamber 4-2 formed on the upper side of the closed partition plate 13 so as to communicate with each other, and are provided on the connection pipes 14, respectively. The flow rate of the syngas flowing through the The flow rate sensing means 15 to be discharged, the pipe blocking means 16 to be provided and opened on the connection pipe 14, respectively, and the flow rate of the syngas detected by the flow rate sensing means 15 It characterized in that it comprises a control unit 17 for blocking the corresponding pipe blocking means 16 at a time point to be changed to increase.

The above objects and various advantages of the present invention will become more apparent from the preferred embodiments of the invention described below with reference to the accompanying drawings by those skilled in the art.

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

Figure 2 is a schematic diagram showing the dust collection device of the gasification furnace system according to the present invention.

Prior to the description, the same reference numerals are given to the same components as in the related art, and detailed description thereof will be omitted.

In the dust collecting device of the gasification furnace system, the plurality of dust collecting filters 5 provided are directly contacted with the synthesis gas 11 at high temperature and high pressure and the nitrogen gas for back washing at low temperature, thereby preventing thermal damage and mechanical damage. If the specific dust collecting filter 5 is damaged in this way, the dust contained in the syngas 11 is passed through the damaged dust collecting filter 5 without being dusted and carried forward to the subsequent process. By doing so, it causes various problems.

Therefore, in the related art, when a specific dust collecting filter 5 is damaged, the entire process including a subsequent process has to be immediately stopped in order to perform a repair to replace the dust collecting filter 5, which causes a huge loss. There was a problem.

In order to smoothly solve this problem, in the present invention, if a specific dust collecting filter 5 is broken during operation, it is immediately detected, and the broken dust collecting filter 5 is separately blocked by separately breaking the broken dust collecting filter ( 5) while the dust is not carried over to the subsequent process, the normal operation is continuously performed by using the remaining undamaged dust filters (5) so that no interruption of the entire process occurs.

To this end, the insulating fixing plate 6 is provided to partition the inside of the housing 2 into an upper exhaust chamber 4 and an intake chamber 3 below, and to suspend and fix the plurality of dust filters 5. In the upper exhaust chamber 4, a closing partition plate 13 for closing each dust collecting filter 5 side is provided as shown in FIG. One section exhaust chamber 4-1 is formed to correspond to the upper end side of (5) so that a part of the exhaust chamber 4 is used as the section exhaust chambers 4-1. As such, the exhaust chamber 4 existing on the upper side of the closed partition plate 13 will be referred to as the upper exhaust chamber 4-2 for convenience of description.

That is, in each section exhaust chamber 4-1, a nitrogen gas supply pipe for supplying nitrogen gas for backwashing to the upper end of the dust collecting filter 5, the venturi 7 and the venturi 7 corresponding thereto ( 8) is provided.

Furthermore, a plurality of connection pipes 14 are provided to connect each section exhaust chamber 4-1 and the upper exhaust chamber 4-2 so as to communicate with each other, and flow sensing means 15 is provided on each connection pipe 14. ) And the pipe blocking means 16, and the flow rate detecting means 15 and the pipe blocking means 16 are electrically connected to a separate control unit 17.

Here, the flow rate detecting means 15 detects the flow rate of the synthesis gas flowing through the inside of the connection pipe 14 and detects a time point at which the flow rate of the synthesis gas is increased so as to increase the detection signal to the controller 17 side. As soon as the control unit 17 receives the detection signal sent from the specific flow rate sensing unit 15, the control unit 17 operates to close the corresponding pipe blocking unit 16.

In this case, a differential pressure sensor that is commonly used as the flow rate sensing means 15 may be used, and an automatic valve may be used as the pipe blocking means 16.

With the above configuration, the operation thereof will be described below.

During operation, the synthesis gas 11 of high temperature and high pressure flows into the intake chamber 3 through the gas inlet 1, and then rises by forming an upward flow in the intake chamber 3, thereby collecting the dust in the vertical direction. It is the same as in the prior art that the back washing is periodically carried out through the venturi 7 to remove dust that passes through the filters 5 and adheres to the dust collecting filters 5 according to the corresponding dust removal. .

Then, the synthesis gas passing through the dust collecting filters (5) is introduced into each section exhaust chamber (4-1), and then flows through the connecting pipe (14) connected to each section exhaust chamber (4) After flowing into the exhaust chamber 4-2, the gas is discharged through the gas outlet 9 of the upper end of the upper exhaust chamber 4-2, and then supplied to the subsequent process.

During this normal operation, when a specific dust collecting filter 5 is broken, the synthetic gas 11 flows through the broken dust collecting filter 5 without receiving resistance due to filtering, and thus a larger amount passes. In the section exhaust chamber 4-1 corresponding to the damaged dust collecting filter 5, a large amount of syngas is introduced and then flows through the connected connecting pipe 14, and thus, on the corresponding connecting pipe 14 The flow rate sensing means 15 provided in the unit detects an increase in the flow rate of the syngas and immediately sends a detection signal to the control unit 17.

Then, the control unit 17 is controlled to operate so that the pipe blocking means 16 provided on the connection pipe 14 close thereto.

Thus, as soon as the damaged dust collecting filter 5 is generated, the corresponding connection pipe 14 is closed, so that the synthetic gas which has not been removed by passing through the damaged dust collecting filter 5 as it is is discharged to the subsequent process as much as possible. It can be prevented.

In addition to this action, the normal process through the unbroken dust collecting filter 5 is to continue as it is, it is possible to minimize the enormous loss due to the process and equipment interruption.

In addition, as dust removal is continuously performed using only the remaining dust collecting filters 5 except the damaged dust collecting filter 5 as described above, the dust load is increased and attached to the remaining dust collecting filters 5. Since the amount of dust is also increased, the controller 17 properly controls the backwashing control sequence so that the backwashing cycle for the remaining dust collecting filters 5 is made faster, and the backwashing is not performed for the broken dust collecting filters 5. Will also change.

In addition, the flow rate sensing means 15 provided on each of the connecting pipes 14 has been shown to detect the flow rate fluctuation of the synthesis gas flowing in the connecting pipe 14, but the flow rate sensing means ( 15 only measures the flow rate of the syngas flowing through the corresponding connection pipe 14 and transmits the measured value to the control unit 17, the control unit 17 to measure the flow rate change in the specific connection pipe (14) It may be configured to check and close the pipe blocking means 16 corresponding thereto.

In the foregoing description, it should be understood that those skilled in the art can make modifications and changes to the present invention without changing the gist of the present invention as merely illustrative of a preferred embodiment of the present invention.

According to the present invention, it is possible to carry out a stable process of the subsequent process by preventing the dust is not carried forward to the subsequent process through the broken dust filter as it is, and when the specific dust filter is broken, the entire apparatus and process Since the normal operation is continuously performed using the remaining dust collecting filters without stopping, the effect of minimizing the enormous loss due to the device and the process stop can be achieved.

Claims (5)

In order to remove dust contained in the high temperature and high pressure syngas 11 discharged from the gasification furnace, the inside of the sealed housing 2 is divided into an upper exhaust chamber 4 and a lower intake chamber 3. In the dust collecting apparatus of the gasification furnace system, which is provided with a plurality of dust collecting filters (5) to be suspended on the isolation fixing plate (6), A closing partition plate 13 provided to close the respective dust collecting filter 5 sides with each other in the exhaust chamber 4; In order to connect the plurality of section exhaust chambers 4-1 formed in the closed partition plate 13 and the upper exhaust chamber 4-2 formed at the upper side of the closed partition plate 13 to communicate with each other. A plurality of connection pipes 14 provided; A flow rate sensing means (15) provided on the connection pipe (14) to detect a flow rate of the syngas flowing through the inside; Pipe blocking means 16 are provided on the connecting pipe 14, respectively, and are opened and closed; Gasification melting furnace system characterized in that it comprises a control unit 17 for blocking the corresponding pipe shut-off means 16 at a time when the flow rate of the synthesis gas detected by the flow rate detection means 15 is increased to increase. Dust collection device. The method of claim 1, The flow rate detection means 15, Dust collecting device of the gasification furnace system, characterized in that the differential pressure sensor. The method of claim 1, The pipe blocking means 16, Dust collecting device of the gasification furnace system characterized in that the automatic valve. The method of claim 1, When the flow rate detecting means 15 detects that the flow rate of the syngas flowing in the corresponding connection pipe 14 is increased and sends a detection signal to the control unit 17, the control unit 17 corresponds. Dust collecting device of the gasifier furnace system, characterized in that for closing the pipe blocking means (16). The method of claim 1, The flow rate sensing means 15 measures the flow rate of the syngas flowing in the corresponding connection pipe 14 and sends it to the control unit 17, wherein the control unit 17 changes the flow rate value. Confirming the connection pipe (14), dust collecting device of the gasification furnace system, characterized in that for closing the corresponding pipe blocking means (16).

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