CN213434359U - Lean carbon catalyst regenerator - Google Patents
Lean carbon catalyst regenerator Download PDFInfo
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- CN213434359U CN213434359U CN202021609331.2U CN202021609331U CN213434359U CN 213434359 U CN213434359 U CN 213434359U CN 202021609331 U CN202021609331 U CN 202021609331U CN 213434359 U CN213434359 U CN 213434359U
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- regenerator
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- gas distributor
- fuel gas
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Abstract
The utility model relates to a lean carbon catalyst regenerator, including the regenerator casing of built-in catalyst bed to and be located the combustion-supporting gas distributor and the supplementary fuel gas distributor of catalyst bed, supplementary fuel gas distributor is located the below or the top of combustion-supporting gas distributor. Compared with the prior art, the utility model discloses the device investment is low, and fuel cost is low, regeneration effect is good and environmental protection burden is low.
Description
Technical Field
The utility model belongs to the technical field of catalyst regeneration equipment, a lean carbon catalyst regenerator is related to.
Background
Fluidized and fixed beds are two common types of gas-solid reactors. Compared with a fixed bed, the fluidized bed has the advantages of stable catalyst performance, high mass and heat transfer efficiency, constant-temperature operation, large-scale continuous input and output of particles, large operation elasticity and the like, and is widely applied to the petrochemical industry.
Fluidized bed reaction systems typically comprise a fluidized bed reactor and a catalyst regenerator, with catalyst deactivated by coking during the reaction, and its activity and selectivity restored by burning in the regenerator. The catalyst is burnt in a catalyst dense-phase fluidized bed in a gas-solid countercurrent contact mode, air is in contact combustion with coke on the catalyst, and accumulated carbon is removed while heat is provided for a reaction system.
The regeneration temperature is an important condition for the catalyst regeneration process to proceed, which affects the scorching rate and the regeneration effect. When the regeneration temperature of the catalyst is higher than a certain temperature, the scorching rate is proper, and the regeneration purpose can be realized; when the regeneration temperature is lower than a certain temperature, the scorching rate is too low, the scorching process cannot be carried out, and the purpose of catalyst regeneration cannot be realized. The common catalytic cracking unit has high coke production rate, and the heat released by coke combustion is enough to provide the heat required by the reaction system, so that the regenerator can be maintained at a proper temperature without adding other supplementary fuel. The coke rate of the alkane dehydrogenation and light hydrocarbon cracking devices is low, the carbon deposit of the catalyst to be generated is little, the device belongs to a lean carbon catalyst, the coke combustion is not enough to provide the heat required by the reaction system, and the temperature of the regenerator cannot be maintained, so that extra heat needs to be provided by supplementing fuel, and the temperature of the regenerator is kept stable.
In the catalyst regeneration process, the common supplementary fuel is diesel oil and fuel oil, which are collectively called fuel oil. The fuel oil use cost is higher, contains impurity such as more sulphur, nitrogen moreover, can release more sulfur dioxide and nitrogen oxide in combustion process, needs supporting SOx/NOx control facility that sets up just can satisfy the fume emission standard, and this makes catalyst regenerator's regeneration effect not good, and equipment investment running cost is also higher relatively.
In addition, the cracking of fuel oil can generate carbon deposit, so the existing regenerator supplementary fuel nozzle is arranged above the combustion-supporting gas (air) distributor, and the aim is to ensure the catalyst to burn carbon completely, so that the catalyst leaving the regenerator can carry oxygen or oxidizing substances and needs to be removed by adding the processes of steam stripping and the like.
SUMMERY OF THE UTILITY MODEL
The utility model aims at providing a lean carbon catalyst regenerator.
The purpose of the utility model can be realized through the following technical scheme:
the lean carbon catalyst regenerator comprises a regenerator shell with a built-in catalyst bed layer, a combustion-supporting gas distributor and a supplementary fuel gas distributor, wherein the combustion-supporting gas distributor and the supplementary fuel gas distributor are positioned in the catalyst bed layer, and the supplementary fuel gas distributor is positioned below or above the combustion-supporting gas distributor.
Further, the supplementary fuel gas distributor is positioned below the combustion-supporting gas distributor. Because the ignition temperature of the supplementary fuel gas is higher, the supplementary fuel gas preferably enters the catalyst bed layer below the combustion-supporting gas, so that the waste heat of the catalyst can be utilized, and the preheating equipment is saved.
Furthermore, the combustion-supporting gas distributor is also connected with combustion-supporting gas supply equipment through a combustion-supporting gas pipeline. In the utility model, the suitable combustion-supporting gas is oxygen or air, etc.
Further, the supplementary fuel gas distributor is also connected with a supplementary fuel gas supply device through a supplementary fuel gas pipeline. The utility model discloses in, the supplementary fuel gas that is suitable for is light hydrocarbon fuel such as natural gas, ethane, fuel gas, and its is with low costs, and the sulphur nitrogen content is low, does not need supporting construction SOx/NOx control facility, and is environment-friendly. In addition, the supplementary fuel gas is adopted to perform gas stripping and temperature reduction on the regenerated catalyst, the oxygen content of the catalyst is regulated, the equipment investment of gas stripping and the like is saved, and the selectivity of the catalyst is improved. In addition, because the light fuel is stable, the coke generated by cracking is little, and the influence on the activity of the catalyst can be ignored.
Furthermore, the supplementary fuel gas supply device is a light hydrocarbon fuel supply device.
Still more preferably, the light hydrocarbon fuel supply device is a natural gas storage tank.
Still more preferably, the light hydrocarbon fuel supply device is an ethane storage tank.
Still more preferably, the light hydrocarbon fuel supply device is a fuel gas storage tank.
Furthermore, a spent catalyst inlet is also arranged at the top of the regenerator shell.
Furthermore, the bottom of the regenerator shell is also provided with a regenerated catalyst outlet.
Compared with the prior art, the utility model discloses the device investment is low, and fuel cost is low, regeneration effect is good and environmental protection burden is low.
Drawings
Fig. 1 is a schematic structural view of the present invention;
the notation in the figure is:
1-regenerator shell, 2-combustion-supporting gas distributor, 3-supplementary fuel gas distributor; 11-spent catalyst, 12-regenerated catalyst, 21-combustion-supporting gas and 22-supplementary fuel gas.
Detailed Description
The present invention will be described in detail below with reference to the accompanying drawings and specific embodiments. The embodiment is implemented on the premise of the technical solution of the present invention, and a detailed implementation manner and a specific operation process are given, but the scope of the present invention is not limited to the following embodiments.
In the following embodiments, for example, the combustion-supporting gas distributor and the supplementary fuel distributor are gas distribution devices commonly used in the industry, and the rest of the functional components or structures, which are not specifically described, also indicate that the functional components or structures are conventional components or conventional structures for realizing corresponding functions in the art.
Example (b):
the embodiment provides a lean carbon catalyst regenerator, which comprises a regenerator shell 1 with a built-in catalyst bed layer, a combustion-supporting gas distributor 2 and a supplementary fuel gas distributor 3, wherein the combustion-supporting gas distributor 2 and the supplementary fuel gas distributor 3 are positioned in the catalyst bed layer, and the supplementary fuel gas distributor 3 is positioned below or above the combustion-supporting gas distributor 2.
In a preferred embodiment, the supplementary fuel gas distributor 3 is located below the combustion-supporting gas distributor 2, and because the ignition temperature of the supplementary fuel gas is high, the supplementary fuel gas preferably enters the catalyst bed layer below the combustion-supporting gas, so that the residual heat of the catalyst can be utilized, and the preheating equipment is saved.
Meanwhile, the combustion-supporting gas distributor 2 is also connected to a combustion-supporting gas supply device through a combustion-supporting gas pipeline, and in this embodiment, the combustion-supporting gas 21 may be oxygen or air.
The supplementary fuel gas distributor 3 is also connected to a supplementary fuel gas supply apparatus through a supplementary fuel gas pipe. In this embodiment, the applicable supplementary fuel gas 22 may be light hydrocarbon fuel such as natural gas, ethane, fuel gas, etc., and has low cost, low sulfur and nitrogen content, no need of supporting and constructing desulfurization and denitrification facilities, and environmental friendliness. In addition, the supplementary fuel gas is adopted to perform gas stripping and temperature reduction on the regenerated catalyst, the oxygen content of the catalyst is regulated, the equipment investment of gas stripping and the like is saved, and the selectivity of the catalyst is improved. In addition, because the light fuel is stable, the coke generated by cracking is little, and the influence on the activity of the catalyst can be ignored.
Referring to fig. 1 again, the top of the regenerator housing 1 is further provided with a spent catalyst inlet, the bottom of the regenerator housing 1 is further provided with a regenerated catalyst outlet, during regeneration, the spent catalyst 11 enters the regenerator housing 1 from the spent catalyst inlet, and after regeneration, the regenerated catalyst 12 is discharged from the regenerated catalyst outlet, and correspondingly, the combustion-supporting gas 21 and the supplementary fuel gas 22 are respectively introduced into the regenerator housing 1 through the combustion-supporting gas distributor 22 and the supplementary fuel gas distributor 33.
The embodiments described above are intended to facilitate the understanding and use of the invention by those skilled in the art. It will be readily apparent to those skilled in the art that various modifications to these embodiments may be made, and the generic principles described herein may be applied to other embodiments without the use of the inventive faculty. Therefore, the present invention is not limited to the above embodiments, and those skilled in the art should make improvements and modifications within the scope of the present invention according to the disclosure of the present invention.
Claims (9)
1. The lean carbon catalyst regenerator is characterized by comprising a regenerator shell with a built-in catalyst bed layer, a combustion-supporting gas distributor and a supplementary fuel gas distributor, wherein the combustion-supporting gas distributor and the supplementary fuel gas distributor are positioned in the catalyst bed layer, and the supplementary fuel gas distributor is positioned below the combustion-supporting gas distributor.
2. The lean carbon catalyst regenerator of claim 1 wherein the combustion gas distributor is further connected to a combustion gas supply device via a combustion gas conduit.
3. The lean carbon catalyst regenerator of claim 1 wherein the supplemental fuel gas distributor is further connected to a supplemental fuel gas supply via a supplemental fuel gas conduit.
4. The lean carbon catalyst regenerator of claim 3 wherein said supplemental fuel gas supply means is a light hydrocarbon fuel supply means.
5. The lean carbon catalyst regenerator of claim 4 wherein the light hydrocarbon fuel supply is a natural gas storage tank.
6. The lean carbon catalyst regenerator of claim 4 wherein the light hydrocarbon fuel supply is an ethane storage tank.
7. The lean carbon catalyst regenerator of claim 4 wherein the light hydrocarbon fuel supply means is a fuel gas storage tank.
8. The lean carbon catalyst regenerator of claim 1 further comprising a spent catalyst inlet disposed at the top of the regenerator housing.
9. The lean carbon catalyst regenerator of claim 1 wherein the regenerator housing is further provided with a regenerated catalyst outlet at the bottom.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021609331.2U CN213434359U (en) | 2020-08-06 | 2020-08-06 | Lean carbon catalyst regenerator |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021609331.2U CN213434359U (en) | 2020-08-06 | 2020-08-06 | Lean carbon catalyst regenerator |
Publications (1)
| Publication Number | Publication Date |
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| CN213434359U true CN213434359U (en) | 2021-06-15 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202021609331.2U Active CN213434359U (en) | 2020-08-06 | 2020-08-06 | Lean carbon catalyst regenerator |
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| CN (1) | CN213434359U (en) |
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2020
- 2020-08-06 CN CN202021609331.2U patent/CN213434359U/en active Active
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