KR20200006832A - Multistage combustion type of catalyst regenerator and regeneration method thereof - Google Patents

Abstract

An embodiment of the present invention relates to a catalyst regenerator of a multistep combustion method, which prevents a coking catalyst, a regeneration target, from being exposed to an environment of a high temperature. According to an embodiment of the present invention, the catalyst regenerator of a multistep combustion method includes: a reaction chamber which flows a coking catalyst in the direction opposite to the flow direction of air and vapor fuel and flows out the regenerated catalyst to an outlet after regenerating the coking catalyst flowing into an inlet in a regeneration space; a first combustion area which is included to be near the inlet inside the reaction chamber, supplies heat to the coking catalyst by generating hydrogen, carbon monoxide, and solid carbon with partial oxidation of vapor fuel, and generates steam and carbon dioxide by burning the generated hydrogen, carbon monoxide, and solid carbon; and a second combustion area which is included to be near the outlet inside the reaction chamber connected to the first combustion area, and oxidizes and removes carbon remaining on the surface of the coking catalyst with air supplied additionally.

Description

Multi-stage combustion type catalyst regenerator and its regeneration method {MULTISTAGE COMBUSTION TYPE OF CATALYST REGENERATOR AND REGENERATION METHOD THEREOF}

The present invention relates to a multistage combustion type catalyst regenerator and a regeneration method thereof, and more particularly, to a multistage combustion type catalyst regenerator and a regeneration method of preventing a coking catalyst to be exposed to a high temperature environment.

In general, ethylene is a representative material of basic raw materials in petrochemicals. The petrochemical process produces various materials through various processes based on olefin compounds such as ethylene and propylene.

Catalysts are used to produce olefins from naphtha. The catalyst is coked in the course of naphtha cracking. That is, carbon particles cover the surface of the catalyst.

The coking catalyst covered with carbon is recycled and then mixed with naphtha to undergo a cycle used for the decomposition reaction of naphtha. By the way, when the catalyst is coked, it becomes difficult for the naphtha decomposition reaction to occur smoothly.

As disclosed in US Pat. No. 7,153,479, when regenerating the coking catalyst, a fuel supplying method uses a nozzle to inject liquid fuel into a catalyst fluidized bed in powder form.

As such, the method of injecting liquid fuel may generate a hot spot where heat is concentrated in the catalyst fluidized bed due to the low dispersion performance of the fuel. The generation of hot spots will expose the coking catalyst to be regenerated at high temperatures.

After the catalyst is exposed to high temperature, the performance of the catalyst is reduced. Therefore, the replacement cycle of the catalyst is shortened. This increases the process cost in the olefin production process.

One embodiment of the present invention relates to a multistage combustion type catalyst regenerator which prevents a coking catalyst to be exposed to a high temperature environment. In addition, an embodiment of the present invention relates to a multi-stage combustion catalyst regeneration method for regenerating the coking catalyst using the multi-stage combustion catalyst regenerator.

The multistage combustion type catalyst regenerator according to an embodiment of the present invention flows a coking catalyst in a direction opposite to the flow direction of gaseous fuel and air, and regenerates the regenerated catalyst after regenerating the coking catalyst introduced into the inlet in the regeneration space. A reaction chamber which flows out to the outlet, is provided adjacent to the inlet in the reaction chamber, generates hydrogen, carbon monoxide and solid carbon by partial oxidation of gaseous fuel to supply heat to the coking catalyst, the generated hydrogen, carbon monoxide and A first combustion zone that burns solid carbon to generate water vapor and carbon dioxide, and is provided adjacent to the outlet in the reaction chamber connected to the first combustion zone, and remains on the surface of the coking catalyst with additional air And a second combustion region for oxidizing and removing carbon.

The second combustion zone may be provided at the outlet side of the reaction chamber to include an air supply unit for removing residual carbon to supply air.

The first combustion region may include a complete combustion section and a partial oxidation section, which are divided according to combustion of the gaseous fuel supplied and disposed at upper and lower portions of the reaction chamber, respectively.

The partial oxidation section includes a fuel supply unit for supplying a gaseous fuel or a mixture of gaseous fuel and air, and a partial oxidation porous plate provided in one or a plurality of layers above the fuel supply unit, and generates hydrogen produced by partial oxidation of gaseous fuel. , Carbon monoxide and solid carbon and coking catalyst may be mixed and heat-transferd in the partially oxidized porous plate.

The complete combustion section includes a fuel combustion air supply unit for supplying air for complete combustion of the gaseous fuel, and a completely burned porous plate provided in one or a plurality of layers above the fuel combustion air supply unit. Hydrogen, carbon monoxide, and solid carbon produced by partial oxidation can be completely combusted to supply air for fuel combustion to produce water vapor and carbon dioxide, which can then be mixed and heat transferred in the completely burned porous plate.

The flow direction of the gaseous fuel and air may be formed from the lower portion of the reaction chamber to the upper portion, and the flow direction of the coking catalyst and the regenerated catalyst may be formed from the upper portion of the reaction chamber to the lower portion.

The first combustion region may include a partition wall which is divided into a plurality of sections in a horizontal direction crossing the flow direction of the gaseous fuel and air and extends up and down.

The partition wall may be disposed in the first combustion region to partition the plurality of first combustion regions in the horizontal direction, and the second combustion region may be formed as one under the partition wall.

The second combustion zone may include an air supply unit for removing residual carbon provided on the outlet side of the reaction chamber to supply air to a plurality of sections of the first combustion zone.

Each of the plurality of sections of the first combustion region includes a complete combustion section and a partial oxidation section, respectively, which are classified according to combustion of the supplied gaseous fuel and disposed at the upper and lower portions of the reaction chamber, respectively. A fuel supply unit for supplying a gaseous fuel or a mixture of gaseous fuel and air, and a partial oxidation porous plate provided in one or a plurality of layers above the fuel supply unit, hydrogen, carbon monoxide and solid phase produced by partial oxidation of the gaseous fuel Carbon and coking catalyst may be mixed and heat transferred in the partially oxidized porous plate.

Each of the plurality of sections of the first combustion region includes a complete combustion section and a partial oxidation section, respectively, which are classified according to the combustion of the supplied gaseous fuel and disposed at the top and the bottom of the reaction chamber, respectively. A fuel combustion air supply unit for supplying air for the complete combustion of the gaseous fuel, and a completely burned porous plate provided in one or a plurality of layers above the fuel combustion air supply unit, and is produced by partial oxidation of the gaseous fuel Hydrogen, carbon monoxide and solid carbon may be mixed and heat transferred in the completely burned porous plate to produce complete combustion of water vapor and carbon dioxide.

The reaction chamber includes a first chamber forming the first combustion region, and a second combustion region extending from the first chamber in a horizontal direction receiving a lower end of the first chamber in an up-down direction and crossing the up-down direction. It may include a second chamber to form.

The first chamber may form an outlet at an opposite side of the inlet, and the outlet may be formed at the side of the second chamber that is higher than the outlet.

The second combustion region may include an air supply unit for removing residual carbon, which is provided at a side of the discharge port inside the second chamber and supplies air.

The flow direction of the gaseous fuel and air is formed in the upper portion from the lower portion of the first chamber and the second chamber, the flow direction of the air is further formed from the upper portion and the center to the outer portion in the lower portion of the second chamber, The flow direction of the caulking catalyst and the regeneration catalyst may be formed from the upper portion to the lower portion of the first chamber and the second chamber, the flow direction of the regeneration catalyst may be further formed from the center of the second chamber to the outside.

The reaction chamber is connected to the inlet to introduce a caulking catalyst, a lower opening member installed at the lower end to receive the lower end of the introduction tube, and inserted below the lower opening member to receive the lower end of the introduction tube It may include an upper opening member which is installed on the bottom of the reaction chamber.

The first combustion zone may include a complete combustion section and a partial oxidation section, which are divided according to combustion of the supplied gaseous fuel and are disposed at the center and the outside of the reaction chamber, respectively.

The partial oxidation section may be set between the upper opening member and the lower opening member, and may include a fuel supply unit supplying a gaseous fuel or a mixture of gaseous fuel and air.

The complete combustion section may be set between the introduction tube and the upper opening member, and may include a fuel combustion air supply unit supplying air for complete combustion of the gaseous fuel.

The second combustion zone is provided on the outside of the lower opening member, and an air supply unit for removing residual carbon that supplies air for oxidizing and removing carbon remaining on the surface of the caulking catalyst to the first combustion zone, and removing the residual carbon. A porous plate is provided between the lower opening member and the inner wall of the reaction chamber above the air supply, wherein the porous plate is made of hydrogen, carbon monoxide, and solid carbon generated by partial oxidation of gaseous fuel and less coking. The catalyst may be further mixed and heat transferred to further oxidize and remove carbon remaining on the surface of the caulking catalyst.

The flow direction of the gaseous fuel and air may be formed from the center to the outside of the reaction chamber or from the outside to the center, and the flow direction of the coking catalyst and the regeneration catalyst may be formed from the center of the reaction chamber to the outside.

According to one embodiment of the present invention, a multi-stage combustion type catalyst regenerator includes a reaction chamber for flowing a coking catalyst in a direction opposite to the flow direction of gaseous fuel and air and regenerating the catalyst, and partial oxidation of gaseous fuel in the reaction chamber. Coking with a first combustion zone that produces hydrogen, carbon monoxide and solid carbon to supply heat to the coking catalyst, completely burns the produced hydrogen, carbon monoxide and solid carbon to produce water vapor and carbon dioxide, and additionally supplied air. It may include a second combustion zone for oxidizing and removing the carbon remaining on the surface of the catalyst.

The flow direction of the gaseous fuel and air may be formed from the bottom to the top of the reaction chamber, and the flow direction of the coking catalyst and the regeneration catalyst may be formed from the top to the bottom of the reaction chamber.

The flow direction of the gaseous fuel and air may be formed from the center to the outside of the reaction chamber or from the outside to the center, and the flow direction of the coking catalyst and the regeneration catalyst may be formed from the center of the reaction chamber to the outside.

In the multistage combustion type catalyst regeneration method according to an embodiment of the present invention, a first step of flowing a coking catalyst in a first direction in the reaction chamber, and a second direction to flow back in the first direction in the reaction chamber It supplies gaseous fuel or hydrogen, carbon monoxide and solid carbon produced by partial oxidation of gaseous fuel and air to supply heat to the coking catalyst in the first combustion zone, and burns the produced hydrogen, carbon monoxide and solid carbon to produce steam. And a second step of generating carbon dioxide, and a third step of supplying air to oxidize and remove carbon remaining on the surface of the coking catalyst in the second combustion zone to regenerate the coking catalyst.

The second step is to prevent the high temperature exposure of the coking catalyst by lowering the reaction heat of the coking catalyst with partially oxidized hydrogen, carbon monoxide and solid carbon.

The first step and the third step flow the coking catalyst and the regeneration catalyst from the top of the reaction chamber to the bottom, and the second and third steps direct the gaseous fuel and air from the bottom of the reaction chamber. Can flow upwards.

The first and third steps flow the coking catalyst and the regeneration catalyst outward from the center of the reaction chamber, and the second and third steps direct the gaseous fuel and air from the center of the reaction chamber. It can be flowed outward or outward to the center.

As such, one embodiment of the present invention generates hydrogen, carbon monoxide and solid carbon by partial oxidation of gaseous fuel to supply heat to the coking catalyst, and burns the generated hydrogen, carbon monoxide and solid carbon to produce water vapor and carbon dioxide. It generates and further oxidizes and removes carbon remaining on the surface of the coking catalyst with additionally supplied air, thereby lowering the heat of reaction of the coking catalyst to prevent high temperature exposure of the coking catalyst.

1 is a block diagram of a catalyst regenerator of a multi-stage combustion method according to a first embodiment of the present invention.
2 is a block diagram of a catalyst regenerator of a multi-stage combustion method according to a second embodiment of the present invention.
3 is a block diagram of a catalyst regenerator of a multi-stage combustion method according to a third embodiment of the present invention.
4 is a block diagram of a catalyst regenerator of the multi-stage combustion method according to a fourth embodiment of the present invention.
5 is a flowchart of a catalyst regeneration method of a multi-stage combustion method according to an embodiment of the present invention.

DETAILED DESCRIPTION Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings so that those skilled in the art may easily implement the present invention. As those skilled in the art would realize, the described embodiments may be modified in various different ways, all without departing from the spirit or scope of the present invention. In the drawings, parts irrelevant to the description are omitted to clearly describe the present invention, and like reference numerals designate like elements throughout the specification.

1 is a block diagram of a catalyst regenerator of a multi-stage combustion method according to a first embodiment of the present invention. Referring to FIG. 1, the multistage combustion type catalyst regenerator 1 of the first embodiment includes a reaction chamber 30, a first combustion region 10, and a second combustion region 20 to regenerate a coking catalyst. It is composed.

Although not shown, the fluidized bed reactor mixes a reactant and a catalyst (or regenerated catalyst) in a riser (not shown) to cause a decomposition reaction of the reactant, and then separates the caulked caulking catalyst and the product into a cyclone to separate the caulking catalyst. Is dropped into the multistage combustion type catalyst regenerator 1 (see FIG. 1).

In one embodiment, a process for producing olefins using naphtha as a reactant, that is, a process for producing an olefin by a fluid catalyst cracking (FCC) method, corresponds to the previous process of the present embodiment, and may be used as a by-product as methane. Generates.

The previous process mixes naphtha and catalyst, causes naphtha decomposition reaction, separates the caulked catalyst and the produced olefin from a cyclone (not shown), and drops the coking catalyst into a multistage combustion catalyst regenerator (1). .

That is, naphtha is injected into the bottom of the riser and encounters a high temperature catalyst (including a regenerated catalyst) and starts to decompose through a catalytic reaction. Naphtha continues to endothermally decompose as it rises along the riser.

After the naphtha decomposition reaction, the catalyst covered with solid carbon particles, that is, the coking catalyst and the olefin produced in the decomposition reaction, enter the cyclone and are separated from each other. The caulking catalyst separated from the cyclone falls into the catalyst regenerator 1 of the multistage combustion method. That is, the catalyst of the previous process is supplied to the catalyst regenerator 1 of the multistage combustion method by falling to the inlet (31).

The multi-stage combustion type catalyst regenerator 1 of the first embodiment generates hydrogen, carbon monoxide and solid carbon by partial oxidation of gaseous fuel to supply heat to the coking catalyst, and completely burns the generated hydrogen, carbon monoxide and solid carbon. To produce water vapor and carbon dioxide, and to regenerate the catalyst while oxidizing and removing carbon remaining on the surface of the coking catalyst with additionally supplied air. That is, since the multistage combustion type catalyst regenerator 1 of the first embodiment uses partial oxidation products, the reaction heat of the coking catalyst is lowered to prevent high temperature exposure of the coking catalyst.

In the first embodiment, the reaction chamber 30 flows the caulking catalyst in a direction opposite to the flow direction of the gaseous fuel and air (upstream, second direction) (downstream, first direction), and into the inlet 31. After the incoming caulking catalyst is regenerated in the regeneration space RGS, the regenerated catalyst is discharged to the outlet 32.

Relatively speaking, the first combustion zone 10 is provided adjacent to the inlet 31 in the reaction chamber 30, and the second combustion zone 20 is connected to the first combustion zone 10 to react. It is provided adjacent to the outlet 32 in the chamber 30.

The first combustion zone 10 generates hydrogen, carbon monoxide and solid carbon by partial oxidation of the gaseous fuel, supplies heat to the coking catalyst, and burns the generated hydrogen, carbon monoxide and solid carbon, i.e., complete combustion furnace Produces water vapor and carbon dioxide. The second combustion zone 20 oxidizes and removes the carbon remaining on the surface of the coking catalyst via the first combustion zone 10 with the air supplied additionally.

The first combustion region 10 includes a complete combustion section 12 and a partial oxidation section 11 classified according to the combustion of the gaseous fuel supplied. The gaseous fuel (or mixture of gaseous fuel and air) is supplied to the lower partial oxidation section 11.

Accordingly, the partial oxidation section 11 and the complete combustion section 12 are disposed at the lower and upper portions of the reaction chamber 30, respectively. That is, the gaseous fuel (or a mixture of gaseous fuel and air) is partially oxidized in the lower partial oxidation section 11 and moved upward in the first direction to be completely burned in the upper complete combustion section 12.

The partial oxidation section 11 includes a fuel supply 111 and a partial oxidation porous plate 112. The fuel supply unit 111 supplies a gaseous fuel or a mixture of gaseous fuel and air under the partial oxidation section 11 and the partial oxidation porous plate 112.

The partially oxidized porous plate 112 is provided in one or multiple layers above the fuel supply unit 111. Therefore, hydrogen, carbon monoxide, and solid carbon generated by partial oxidation of gaseous fuel or a mixture of gaseous fuel and air are mixed and heat-transferred with the coking catalyst flowing downward in the partial oxidation porous plate 112.

At this time, the mixture of gaseous fuel and air is supplied to reduce the air flow rate compared to the combustion conditions to form partial oxidation. When only gaseous fuel is supplied, partial oxidation of air and gaseous fuel supplied from the air supply unit 21 for removing residual carbon in the second combustion region 20 may be formed.

The partial oxidation section 11 generates hydrogen, carbon monoxide, and solid carbon through partial oxidation, thereby lowering the heat of reaction to prevent the coking catalyst from being exposed to high temperatures. By controlling the mixing ratio of gaseous fuel and air, the possibility of hot spots is eliminated and the temperature can be controlled.

The complete combustion section 12 includes a fuel combustion air supply 121 and a complete combustion porous plate 122. The fuel combustion air supply unit 121 burns the generated hydrogen, carbon monoxide, and solid carbon to generate water vapor and carbon dioxide, that is, the air for complete combustion, below the completely burned section 12 and the completely burned porous plate 122. To feed.

The completely burned porous plate 122 is provided in one or multiple layers above the fuel supply air supply 121. Therefore, the hydrogen, carbon monoxide, and solid carbon produced in the partial oxidation section 11, that is, steam and carbon dioxide generated by the complete combustion are mixed and heat-transferred with the air for fuel combustion supplied from the completely burned porous plate 122, Downflowing coking catalyst and mixed with each other and heat transfer.

After the partial oxidation section 11, the complete combustion section 12 supplies additional air to completely burn hydrogen, carbon monoxide and solid carbon generated through partial oxidation to generate water vapor and carbon dioxide. Therefore, heat is supplied to the caulking catalyst, whereby carbon on the surface of the catalyst is oxidized and removed.

As such, the first combustion zone 10 regenerates the coking catalyst by heating the gaseous fuel or the mixture of gaseous fuel and air in stages in the partial oxidation section 11 and the complete combustion section 12.

The second combustion zone 20 is provided on the outlet 32 side of the reaction chamber 30 and includes an air supply unit 21 for removing residual carbon. The air supply unit 21 for removing residual carbon further supplies air to further oxidize and remove carbon remaining on the surface of the catalyst regenerated by the coking catalyst while passing through the first combustion region 10.

On the other hand, in the first combustion zone 10, the first combustion supplies heat to the coking catalyst through partial oxidation of gaseous fuel (or a mixture of gaseous fuel and air) in the partial oxidation section 11, and is a partial oxidation product. Complete combustion of hydrogen, carbon monoxide, and solid carbon produces steam and carbon dioxide, and regenerates the catalyst. Second combustion in the second combustion zone 20 oxidizes the carbon remaining on the surface of the coking catalyst with additional air. Remove

Partial oxidation of the first combustion can be classified into a partial oxidation reaction thermally progressed in a high temperature environment (eg, 600 ~ 800 ℃) and a partial oxidation reaction by a catalyst, the first embodiment includes both cases .

As such, in the first embodiment, the gaseous fuel (mixture of gaseous fuel and air) and the flow direction of the air (second direction) are formed (upward flow) from the bottom of the reaction chamber 30 to the coking. The flow direction (first direction) of the catalyst and the regenerated catalyst is formed from the top to the bottom of the reaction chamber 30 (downflow). Therefore, it is possible to transfer the heat of combustion to the catalyst regardless of the occurrence of after-burning phenomenon.

Meanwhile, the cyclone 40 installed in the reaction chamber 30 introduces the caulking catalyst and the flowing gas, separates the flowing gas, and discharges it to the outside of the reaction chamber 30, and discharges the caulking catalyst to the first combustion region 10. Drop to the complete combustion section (12).

Hereinafter, various embodiments of the present invention will be described. The description of the same parts as the first embodiment and the previously described embodiment will be omitted, and different parts will be described.

2 is a block diagram of a catalyst regenerator of a multi-stage combustion method according to a second embodiment of the present invention. Referring to FIG. 2, in the reaction chamber 230 of the multi-stage combustion type catalyst regenerator 2 of the second embodiment, the first combustion region 210 includes a partition wall 213.

The partition wall 213 extends up and down in the direction (horizontal direction) which crosses the flow direction (up-down direction) of gaseous fuel and air. The partition wall 213 divides the first combustion region 210 into a plurality of sections in the reproduction space RGS2. The partition wall 213 may be easily applied to the large installation and the large reaction chamber 230.

Accordingly, the partition wall 213 is disposed in the first combustion region 210 to partition the plurality of first combustion regions 210 in the horizontal direction, and the second combustion region 220 is formed as one under the partition wall 213. .

The second combustion zone 220 includes an air supply unit 221 for removing residual carbon provided on the outlet 232 side of the reaction chamber 230. The residual carbon removal air supply unit 221 may further supply air to further oxidize and remove carbon remaining on the surface of the catalyst regenerated by the coking catalyst while passing through the plurality of sections of the first combustion region 210.

The plurality of sections of the first combustion region 210 are divided according to the combustion of the supplied gaseous fuel so that the complete combustion section 212 and the partial oxidation section 211 are disposed at the upper and lower portions of the reaction chamber 230, respectively. It includes each. The gaseous fuel (or mixture of gaseous fuel and air) is supplied to the lower partial oxidation section 211.

Each partial oxidation section 211 includes a fuel supply 311 and a partial oxidation porous plate 312. The fuel supply unit 311 supplies a gaseous fuel or a mixture of gaseous fuel and air under the partial oxidation section 211 and the partial oxidation porous plate 312.

The partially oxidized porous plate 312 is provided in one or multiple layers above the fuel supply unit 311. Accordingly, hydrogen, carbon monoxide and solid carbon generated and partially moved up by partial oxidation of gaseous fuel or a mixture of gaseous fuel and air are mixed and heat-transferred with the coking catalyst flowing downward in the partial oxidation porous plate 312.

The partial oxidation section 211 generates hydrogen, carbon monoxide and solid carbon through partial oxidation, respectively, to lower the heat of reaction to prevent the coking catalyst from being exposed to high temperatures. By controlling the mixing ratio of gaseous fuel and air, the possibility of hot spots is eliminated and the temperature can be controlled.

Each complete combustion section 212 includes a fuel combustion air supply 321 and a complete combustion porous plate 322. The fuel combustion air supply unit 321 burns the generated hydrogen, carbon monoxide and solid carbon to generate water vapor and carbon dioxide, that is, the air for complete combustion, below the complete combustion section 212 and the completely burned porous plate 322. To feed.

The completely burned porous plate 322 is provided in one or multiple layers above the air combustion unit 321 for fuel combustion. Therefore, the hydrogen, carbon monoxide, and solid carbon generated in the partial oxidation section 211 are burned, that is, steam and carbon dioxide generated in perfect combustion are mixed and heat-transferred with the fuel combustion air supplied from the completely burned porous plate 322. Downflowing coking catalyst and mixed with each other and heat transfer.

After each partial oxidation section 211, each complete combustion section 212 supplies additional air to completely burn hydrogen, carbon monoxide and solid carbon generated through partial oxidation to produce water vapor and carbon dioxide. Therefore, heat is supplied to the caulking catalyst, whereby carbon on the surface of the catalyst is oxidized and removed.

As described above, the first combustion region 210 regenerates the coking catalyst by heating the gaseous fuel or the mixture of gaseous fuel and air in stages in the partial oxidation section 211 and the complete combustion section 212.

The second combustion zone 220 is provided at the outlet 32 side of the reaction chamber 230 and includes an air supply unit 221 for removing residual carbon. The residual carbon removal air supply unit 221 additionally supplies air to further oxidize and remove carbon remaining on the surface of the catalyst regenerated by the coking catalyst while passing through each of the first combustion regions 210.

3 is a block diagram of a catalyst regenerator of a multi-stage combustion method according to a third embodiment of the present invention. Referring to FIG. 3, the reaction chamber 330 of the multi-stage combustion catalyst regenerator 3 of the third embodiment includes a first chamber 331 and a second chamber 332.

The first chamber 331 forms the first combustion region 10, and the second chamber 332 receives the lower end of the first chamber 331 in the vertical direction and crosses the vertical direction in the first chamber. A second combustion region 320 extended from 331 is formed. The first chamber 331 is formed with a discharge port 334 on the opposite side of the inlet 333, the outlet 335 is formed on the side of the second chamber 332 higher than the discharge port 334.

The second combustion region 320 includes an air supply part 341 for removing residual carbon, which is provided at the discharge port 334 in the second chamber 332. The residual carbon removal air supply unit 341 further supplies air to further oxidize and remove carbon remaining on the surface of the catalyst regenerated by the coking catalyst while passing through the first combustion region 310.

As described above, in the third embodiment, the gaseous fuel (mixture of gaseous fuel and air) and the flow direction of the air (second direction) are formed from the bottom of the first chamber 331 and the second chamber 332 to the top ( Upward flow), and the air flow direction is further formed from the lower portion of the second chamber 332 to the upper portion and from the center portion to the outer portion.

And in the third embodiment, the flow direction (first direction) of the coking catalyst and the regeneration catalyst is formed (flow down) from the top of the first chamber 331 and the second chamber 332 (downward flow), The flow direction is further formed outward from the center of the second chamber 332. Therefore, it is possible to transfer the heat of combustion to the catalyst regardless of the occurrence of after-burning phenomenon.

Meanwhile, the cyclone 41 installed in the first chamber 331 flows in the caulking catalyst and the flowing gas, separates the flow gas, and discharges it out of the first chamber 331, and discharges the caulking catalyst in the first combustion region ( 10) to the complete combustion section (12).

The cyclone 42 installed in the second chamber 332 introduces the caulking catalyst and the flowing gas, separates the flowing gas, and discharges it out of the second chamber 332, and discharges the caulking catalyst into the second combustion region 320. Drop it.

4 is a block diagram of a catalyst regenerator of the multi-stage combustion method according to a fourth embodiment of the present invention. Referring to FIG. 4, in the multi-stage combustion catalyst regenerator 4 of the fourth embodiment, the reaction chamber 430 includes an introduction tube 431, a lower opening member 432, and an upper opening member 433.

An introduction tube 431 is connected to the inlet 31 to introduce a caulking catalyst, the lower opening member 432 is installed at the lower end to receive the lower end of the introduction tube 431, the upper opening member 433 is open downward. It is inserted below the member 432 to receive the lower end of the introduction pipe 431 is installed on the bottom of the chamber 430.

The upper opening member 433, the lower opening member 432, and the introduction tube 431 are disposed to be flowable from the center of the reaction chamber 430 to the outside and from the outside to the center.

The first combustion region 410 includes a complete combustion section 412 and a partial oxidation section 411 which are divided according to combustion of the supplied gaseous fuel and disposed at the center and the outside of the reaction chamber 430, respectively.

The partial oxidation section 411 is set between the upper opening member 433 and the lower opening member 432 and includes a fuel supply unit 421. The fuel supply unit 421 supplies the gaseous fuel or a mixture of gaseous fuel and air to the partial oxidation section 411.

The complete combustion section 412 is set between the introduction pipe 431 and the upper opening member 433, and includes a fuel combustion air supply 431. The fuel combustion air supply unit 431 supplies air for complete combustion of gaseous fuel to the complete combustion section 412.

The second combustion zone 420 includes an air supply 441 and a porous plate 442 for removing residual carbon. The residual carbon removal air supply unit 421 is provided outside the lower opening member 432 to supply air for oxidizing and removing carbon remaining on the surface of the caulking catalyst to the first combustion region 410.

The porous plate 442 is provided between the lower opening member 432 and the inner wall of the reaction chamber 430 above the air supply unit 441 for removing residual carbon. Thus, the porous plate 442 further mixes and heat transfers hydrogen, carbon monoxide, and solid carbon generated from partial oxidation of the gaseous fuel and less recycled coking catalyst to further oxidize and remove carbon remaining on the surface of the coking catalyst. . The reaction chamber 430 has a discharge port 435 on the side. Therefore, the regenerated catalyst is discharged to the discharge port 435 via the porous plate 442.

As such, in the fourth embodiment, the gaseous fuel (a mixture of gaseous fuel and air) and the flow direction of the air (second direction) are formed from the center to the outside of the reaction chamber 430 or from the outside to the center, and the coking catalyst and The flow direction of the regeneration catalyst is formed outward from the center of the reaction chamber 430. Therefore, it is possible to transfer the heat of combustion to the catalyst regardless of the occurrence of after-burning phenomenon.

5 is a flowchart of a catalyst regeneration method of a multi-stage combustion method according to an embodiment of the present invention. Referring to FIG. 5, the multi-stage combustion method of regenerating the catalyst may include a first step ST10, a second step ST20, and a third step ST30. For convenience, a description will be given with reference to the configuration of the catalyst regenerator 1 of the multistage combustion system of the first embodiment.

The first step ST10 flows the coking catalyst in the first direction in the reaction chamber 30. In one embodiment, the first step (ST10) flows the catalyst caulked in the process of producing olefins using naphtha as a reactant.

In the second step ST20, the first combustion is performed by supplying hydrogen, carbon monoxide, and solid carbon generated by partial oxidation of gaseous fuel or gaseous fuel and air in a second direction countercurrent to the first direction in the reaction chamber 30. Heat is supplied to the coking catalyst in zone 10 and the resulting hydrogen, carbon monoxide and solid carbon are combusted to produce steam and carbon dioxide. Therefore, the second step ST20 may prevent the high temperature exposure of the coking catalyst by lowering the reaction heat of the coking catalyst with partially oxidized hydrogen, carbon monoxide and solid carbon.

The third step ST30 further supplies air to oxidize and remove carbon remaining on the surface of the coking catalyst in the second combustion zone 20 to regenerate the coking catalyst.

The first step ST10 and the third step ST30 flow the coking catalyst and the regeneration catalyst from the top of the reaction chamber 10 to the bottom, and the second step ST20 and the third step ST30 are gaseous fuel and Air flows from the bottom of the reaction chamber 30 to the top.

In addition, the configuration of the catalyst regenerator 4 of the multistage combustion system of the fourth embodiment will be described. The first stage ST10 and the third stage ST30 flow the coking catalyst and the regenerated catalyst from the center of the reaction chamber 430 to the outside, and the second stage ST20 and the third stage ST30 are gaseous fuel and Air flows from the center of the reaction chamber 430 to the outside or from the outside to the center.

Although the preferred embodiments of the present invention have been described above, the present invention is not limited thereto, and various modifications and changes can be made within the scope of the claims and the detailed description of the invention and the accompanying drawings. Naturally, it belongs to the scope of the invention.

1, 2, 3, 4: Combustion Catalytic Regenerator
10, 210, 310, 410: first combustion region 11, 211, 411: partial oxidation section
12, 212, 412: Complete combustion section 20, 220, 320, 420: Second combustion area
21, 221, 341, 441: air supply for removing residual carbon
30, 230, 330, 430: reaction chamber 31, 231, 333: inlet
32, 232, 335: outlet 40, 41, 42: cyclone
111, 311, and 421: fuel supply parts 112 and 312: partially oxidized porous plate
121, 321: Air supply part for fuel combustion 122, 322: Perforated combustion sheet
213: partition 331: first chamber
332: second chamber 334: discharge port
431: introduction tube 432: downward opening member
433: upward opening member 442: porous plate
RGS, RGS2: Playspace

Claims (28)

A reaction chamber for flowing the coking catalyst in a direction opposite to the flow direction of the gaseous fuel and air, and regenerating the coking catalyst flowing into the inlet in the regeneration space and then flowing the regenerated catalyst into the outlet;
It is provided adjacent to the inlet inside the reaction chamber, generates hydrogen, carbon monoxide and solid carbon by partial oxidation of gaseous fuel to supply heat to the coking catalyst, and burns the generated hydrogen, carbon monoxide and solid carbon to vaporize it. And a first combustion region generating carbon dioxide; And
The second combustion zone is provided adjacent to the outlet port in the reaction chamber connected to the first combustion zone, and further oxidizes and removes carbon remaining on the surface of the coking catalyst with additional air.
Catalyst regenerator of the multi-stage combustion method comprising a. The method of claim 1,
The second combustion region is
It is provided on the outlet side in the reaction chamber,
A multistage combustion type catalyst regenerator comprising an air supply unit for removing residual carbon to supply air. The method of claim 1,
The first combustion region is
Complete combustion section and partial oxidation section which are respectively divided into upper and lower portions in the reaction chamber according to combustion of supplied gaseous fuel
Catalyst regenerator of the multi-stage combustion method comprising a. The method of claim 3,
The partial oxidation section
A fuel supply for supplying gaseous fuel or a mixture of gaseous fuel and air, and
Partially oxidized porous plate provided in one or multiple layers above the fuel supply unit
Including;
A multistage combustion catalyst regenerator for mixing and heat-transferring hydrogen, carbon monoxide, and solid carbon and coking catalyst produced by partial oxidation of gaseous fuel in the partial oxidation porous plate. The method of claim 4,
The complete combustion section
A fuel combustion air supply unit supplying air for complete combustion of the gaseous fuel, and
Complete combustion porous plate provided in one or multiple layers above the air supply for fuel combustion
Including;
A multi-stage combustion catalyst regenerator for mixing and heat-transferring in a completely burned porous plate by supplying fuel combustion air to completely burn hydrogen, carbon monoxide, and solid carbon generated by partial oxidation of gaseous fuel to produce steam and carbon dioxide. The method of claim 1,
The flow direction of the gaseous fuel and air, is formed from the bottom of the reaction chamber to the top,
The flow direction of the coking catalyst and the regeneration catalyst, the catalyst regenerator of the multi-stage combustion type is formed from the top to the bottom of the reaction chamber. The method of claim 1,
The first combustion region is
And a partition wall partitioned into a plurality of sections in a horizontal direction crossing the flow direction of the gaseous fuel and air, and extending vertically. The method of claim 7, wherein
The partition wall
Disposed in the first combustion region and partitioning the plurality of first combustion regions in the horizontal direction;
The second combustion region is
Catalyst regenerator of the multi-stage combustion type is formed in the lower portion of the partition. The method of claim 7, wherein
The second combustion region is
It is provided on the outlet side in the reaction chamber,
Multistage combustion type catalyst regenerator including a residual carbon removal air supply for supplying air to the plurality of sections of the first combustion zone The method of claim 7, wherein
The plurality of sections of the first combustion region
Complete combustion section and partial oxidation section which are respectively divided into upper and lower portions in the reaction chamber according to combustion of supplied gaseous fuel
Each of which contains
Each partial oxidation zone
A fuel supply for supplying gaseous fuel or a mixture of gaseous fuel and air, and
Partially oxidized porous plate provided in one or multiple layers above the fuel supply unit
Including;
A multistage combustion catalyst regenerator for mixing and heat-transferring hydrogen, carbon monoxide, and solid carbon and coking catalyst produced by partial oxidation of gaseous fuel in the partial oxidation porous plate. The method of claim 7, wherein
The plurality of sections of the first combustion region
Complete combustion section and partial oxidation section which are respectively divided into upper and lower portions in the reaction chamber according to combustion of supplied gaseous fuel
Each of which contains
Each complete combustion section
A fuel combustion air supply unit supplying air for complete combustion of the gaseous fuel, and
Complete combustion porous plate provided in one or multiple layers above the air supply for fuel combustion
Including;
A multistage combustion catalyst regenerator comprising mixing and heat transfer in the completely burned porous plate to completely burn hydrogen, carbon monoxide and solid carbon produced by partial oxidation of gaseous fuel to produce steam and carbon dioxide. The method of claim 1,
The reaction chamber
A first chamber forming the first combustion region, and
A second chamber accommodating a lower end of the first chamber in a vertical direction and forming a second combustion region extending from the first chamber in a horizontal direction crossing the vertical direction;
Catalyst regenerator of the multi-stage combustion method comprising a. The method of claim 12,
The first chamber is
A discharge port is formed on the opposite side of the inlet port,
The outlet is
A multistage combustion type catalyst regenerator formed on the side of said second chamber that is higher than said discharge port. The method of claim 13,
The second combustion region is
It is provided on the discharge port side inside the second chamber,
A multistage combustion type catalyst regenerator comprising an air supply unit for removing residual carbon to supply air. The method of claim 12,
The flow direction of the gaseous fuel and air is formed in the upper portion from the lower portion of the first chamber and the second chamber,
The flow direction of the air is further formed from the upper and the center to the outer side at the bottom of the second chamber,
The flow direction of the coking catalyst and the regeneration catalyst is formed from the upper portion to the lower portion of the first chamber and the second chamber,
The flow direction of the regeneration catalyst is a catalyst regenerator of the multi-stage combustion method is further formed from the center of the second chamber to the outside. The method of claim 1,
The reaction chamber
An inlet tube connected to the inlet to introduce a caulking catalyst,
A lower opening member which receives the lower end of the introduction pipe and is installed at the lower end;
An upper opening member inserted below the lower opening member to receive a lower end of the introduction tube and installed at a bottom of the reaction chamber;
Catalyst regenerator of the multi-stage combustion method comprising a. The method of claim 16,
The first combustion region is
Complete combustion section and partial oxidation section, respectively, which are classified according to combustion of gaseous fuel supplied and disposed at the center and the outside of the reaction chamber, respectively.
Catalyst regenerator of the multi-stage combustion method comprising a. The method of claim 17,
The partial oxidation section
Is set between the upper opening member and the lower opening member,
Fuel supply unit for supplying gaseous fuel or a mixture of gaseous fuel and air
Catalyst regenerator of the multi-stage combustion method comprising a. The method of claim 18,
The complete combustion section
Is set between the introduction pipe and the upper opening member,
Fuel combustion air supply unit for supplying air for the complete combustion of the gaseous fuel
Catalyst regenerator of the multi-stage combustion method comprising a. The method of claim 16,
The second combustion region is
It is provided on the outer side of the said downward opening member,
Residual carbon removal air supply unit for supplying air for oxidizing and removing the carbon remaining on the surface of the coking catalyst to the first combustion region, and
A porous plate provided between the lower opening member and the inner wall of the reaction chamber above the air supply unit for removing residual carbon.
More,
The porous plate is
A multi-stage combustion catalyst regenerator that further mixes and heat transfers hydrogen, carbon monoxide and solid carbon produced by partial oxidation of gaseous fuel and less regenerated coking catalyst to further oxidize and remove carbon remaining on the surface of the coking catalyst. The method of claim 17,
The flow direction of the gaseous fuel and air is formed from the center of the reaction chamber to the outside or from the center to the outside,
The flow direction of the coking catalyst and the regeneration catalyst, the catalyst regenerator of the multi-stage combustion method is formed in the center from the center of the reaction chamber. A reaction chamber for flowing the coking catalyst in a direction opposite to the flow direction of the gaseous fuel and air and regenerating the catalyst;
Partial oxidation of the gaseous fuel in the reaction chamber to generate hydrogen, carbon monoxide and solid carbon to supply heat to the coking catalyst, and the first combustion of the hydrogen, carbon monoxide and solid carbon completely burned to produce water vapor and carbon dioxide Combustion zone; And
Second combustion zone for oxidizing and removing carbon remaining on the surface of the coking catalyst with additionally supplied air
Catalyst regenerator of the multi-stage combustion method comprising a. The method of claim 22,
The flow direction of the gaseous fuel and air is formed from the bottom to the top of the reaction chamber,
The flow direction of the coking catalyst and the regeneration catalyst, the catalyst regenerator of the multi-stage combustion type is formed from the top to the bottom of the reaction chamber. The method of claim 22,
The flow direction of the gaseous fuel and air is formed from the center of the reaction chamber to the outside or from the outside to the center,
The flow direction of the coking catalyst and the regeneration catalyst, the catalyst regenerator of the multi-stage combustion type is formed from the center of the reaction chamber to the outside. A first step of flowing the coking catalyst in the first direction in the reaction chamber; And
In the reaction chamber, hydrogen, carbon monoxide and solid carbon generated by partial oxidation of gaseous fuel or gaseous fuel and air are supplied in a second direction countercurrent to the first direction to supply heat to the coking catalyst in the first combustion region. And a second step of generating steam and carbon dioxide by burning the generated hydrogen, carbon monoxide and solid carbon; And
A third step of regenerating the coking catalyst by oxidizing and removing carbon remaining on the surface of the coking catalyst in the second combustion zone by supplying air additionally;
Catalyst regeneration method of the multi-stage combustion method comprising a. The method of claim 25,
The second step is
Partially oxidized hydrogen, carbon monoxide and solid carbon to lower the heat of reaction of the caulking catalyst to prevent high temperature exposure of the caulking catalyst
Regeneration method of catalyst in multistage combustion system. The method of claim 25,
The first step and the third step
Flowing said coking catalyst and regeneration catalyst from top to bottom of said reaction chamber,
The second step and the third step
Flowing the gaseous fuel and air from the bottom of the reaction chamber to the top
Regeneration method of catalyst in multistage combustion system. The method of claim 25,
The first step and the third step
Flowing the coking catalyst and regeneration catalyst from the center of the reaction chamber to the outside,
The second step and the third step
Flowing the gaseous fuel and air from the center to the outside or from the outside to the center
Regeneration method of catalyst in multistage combustion system.

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