CN103849423A - Modified catalytic cracking process device and catalytic cracking process - Google Patents
Modified catalytic cracking process device and catalytic cracking process Download PDFInfo
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- CN103849423A CN103849423A CN201310477531.5A CN201310477531A CN103849423A CN 103849423 A CN103849423 A CN 103849423A CN 201310477531 A CN201310477531 A CN 201310477531A CN 103849423 A CN103849423 A CN 103849423A
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Abstract
The invention discloses a modified catalytic cracking process device and a catalytic cracking process. The modified catalytic cracking process device comprises a to-be-generated catalyst delivery pipeline air inlet, a riser reactor, a stripper, an air lift, a regenerator, a regenerator air inlet, a regenerated catalyst delivery pipeline, a to-be-generated catalyst delivery pipeline, a riser reactor feeding hole, a generated oil gas outlet pipeline and a smoke outlet pipeline and also comprises an air inlet, a catalyst storage tank, a ball value and a catalyst storage tank air inlet ball valve, wherein the air inlet is additionally formed in the lower section of the air lift; the catalyst storage tank is arranged at the lower end of the air lift; the ball value is located between the air inlet additionally arranged at the lower section of the air lift and the catalyst storage tank; the catalyst storage tank air inlet ball valve is located at the lower end of the catalyst storage tank. The device is simple in structure, capable of increasing the work efficiency and reducing the experimental cost and particularly suitable for real-time online measurement of the circulation volume of a catalyst in the process of small riser fluid catalytic cracking in a laboratory.
Description
Technical field
The present invention relates to a kind of improved catalytic cracking process device and catalytic cracking process method, particularly relate to a kind of catalytic cracking process device and method that is applicable to the middle-size and small-size lifting tube flowing catalytic cracking device in laboratory and surveys online catalyst recirculation amount.
Background technology
Lifting tube flowing catalytic cracking device forms (see figure 1) by major partss such as riser reactor, stripper, gaslift, catalyst regenerators.In this device, pack a certain amount of catalyzer into, by regulating each section of differential pressure and tolerance, realize catalyzer and in trans-system again, form stable ciculation fluidized state.
Laboratory lifting tube flowing catalytic cracking device is mainly used in evaluating the cracking performance of stock oil and catalyzer.By adjusting the processing parameters such as temperature of reaction, pressure, agent-oil ratio, truly reflect the cracking performance of stock oil and catalyzer, for research and production provide basic data.
Catalytic cracking reaction process is as follows: under the processing condition such as certain temperature, pressure, agent-oil ratio and oil-feed (stock oil) amount, stock oil enters riser reactor bottom and contacts with the high temperature catalyst coming from revivifier, carries out catalytic cracking reaction.In the process of reaction, the liquids and gases product of generation is discharged from reactor head, and the sedimentation of coke of generation, on catalyzer, causes catalyst activity reduction or inactivation.In order to recover catalyst activity, the catalyzer of coking burns to revivifier through stripping, gas lift, and the catalyzer after regeneration again loops back riser reactor bottom and uses.Like this, catalyzer has just completed a working cycle.
As can be seen here, in said process, except temperature, pressure, oil inlet quantity can be given, this processing parameter of agent-oil ratio (catalyst recirculation amount is agent-oil ratio with the ratio of oil inlet quantity), conventionally by calculating.And at present in the middle-size and small-size transfer line fluid cat cracking experimental installation in laboratory, the calculating of agent-oil ratio normally utilizes the method for carbon balance to calculate.Circular is as follows:
In experimentation, take off the experimental data of certain for some time, record various flows, tolerance, temperature, adopt flue gas sample, analyze its composition.
Calculate catalyst recirculation amount by following formula:
V
0=V
1T
0/T
1 （1）
C
0=V
0(CO%+CO
2%)M/22.4 （2）
G＝C
0/（W1-W2） （3）
Agent-oil ratio=G/O (4)
In formula: V
0: the gas volume (l) under standard state
V
1: the gas volume (l) under experimental state
T
0: the gas temperature (K) under standard state
T
1: the gas temperature (K) under experimental state
C
0: carbon output (g)
CO: carbon monoxide volumn concentration (v%) in flue gas
CO
2: carbon dioxide in flue gas volumn concentration (v%)
M: carbon nucleidic mass
G: catalyst recirculation amount (g/h)
W1: carbon content on reclaimable catalyst (wt%)
W2: carbon content on regenerated catalyst (wt%)
O: device oil inlet quantity (g/h)
Can calculate catalyst recirculation amount by above-mentioned formula (3), formula (4) calculates agent-oil ratio (one of device important operation parameter).
Can find out from calculating formula above: the method for existing calculating catalyst recirculation amount, need to gather several samples analysis, then obtain analytical data and calculate, obtain the result needing.This method exists sampling error, analytical error, causes acquired results error larger, and the agent-oil ratio particularly calculating is the data of this test, is random, rather than set before test.Therefore, want to obtain the testing data turning round under a certain specific agent-oil ratio, need to do test of many times, asymptotic near this agent-oil ratio value.
Obviously, aforesaid method has inconvenience and defect, and is urgently further improved.In order to solve the problem of its existence, relevant manufacturer there's no one who doesn't or isn't seeks solution painstakingly, is completed the problem that this is obviously the anxious wish solution of relevant dealer but have no for a long time applicable design always by development.
Summary of the invention
For the deficiencies in the prior art, the object of the present invention is to provide a kind of improved catalytic cracking process device and catalytic cracking process method.This apparatus structure is simple, and can increase work efficiency, and reduces experimentation cost; Be specially adapted to the middle-size and small-size transfer line fluid cat cracking in laboratory and survey online catalyst recirculation amount.
The object of the invention to solve the technical problems realizes by the following technical solutions.The improved catalytic cracking process device proposing according to the present invention, comprising: reclaimable catalyst line of pipes inlet mouth, riser reactor, stripper, gaslift, revivifier, revivifier inlet mouth, regenerated catalyst line, reclaimable catalyst line of pipes, riser reactor opening for feed, generation oil gas are derived pipeline, flue gas is derived pipeline; Wherein this improved catalytic cracking process device also comprises: the inlet mouth set up in gaslift hypomere, the catalyzer storage tank arranging in gaslift lower end, be positioned at the ball valve between this inlet mouth of setting up in gaslift hypomere and this catalyzer storage tank and be positioned at the catalyzer storage tank air inlet ball valve of this catalyzer storage tank lower end.
The object of the invention to solve the technical problems also can be applied to the following technical measures to achieve further.
More preferably, aforesaid improved catalytic cracking process device, the inlet mouth of setting up in gaslift hypomere is arranged at 1/5 place below gaslift.
More preferably, aforesaid improved catalytic cracking process device, wherein this catalyzer storage tank height is 100～500mm, volume markings scope is 0～300mL.
More preferably, aforesaid improved catalytic cracking process device, wherein this catalyzer storage tank height is 300mm, volume markings scope is 0～100mL.
The object of the invention to solve the technical problems also realizes by the following technical solutions.The catalytic cracking process method of the catalytic cracking process device of the application of aforementioned proposing according to the present invention, it comprises the following steps: open the ball valve being positioned between this inlet mouth of setting up in gaslift hypomere and this catalyzer storage tank, the automatic inflow catalyst storage tank of catalyzer, write down the time that puts catalyzer, then close this and be positioned at the ball valve between this inlet mouth and this catalyzer storage tank, according to the catalytic amount of emitting and time, calculate catalyst recirculation amount.
The object of the invention to solve the technical problems also can be applied to the following technical measures to achieve further.
More preferably, aforesaid catalytic cracking process method, it comprises the following steps:
A. close the ball valve on reclaimable catalyst line of pipes inlet mouth;
B. open the valve of the inlet mouth that gaslift sets up simultaneously, in gaslift, ventilate, keep the tolerance identical with inlet mouth;
C. then open the ball valve between gaslift and catalyzer storage tank, catalyzer flows into catalyzer storage tank, simultaneously writing time;
D. in the time that catalyzer flows into catalyzer storage tank and reaches volume range and be a certain numerical value between 0～100mL, the inlet mouth of closing the ball valve between gaslift and catalyzer storage tank and setting up in gaslift, writing time simultaneously, and the ball valve of opening on reclaimable catalyst line of pipes inlet mouth is ventilated in gaslift;
E. the catalyst weight converting in catalyzer storage tank;
F. open the ball valve and the catalyzer storage tank air inlet ball valve that are positioned between gaslift and catalyzer storage tank, by catalyzer storage tank air inlet ball valve, to the ventilation of catalyzer storage tank, catalyzer returns to gaslift by the connection line between gaslift and catalyzer storage tank;
G. when the catalyzer in catalyzer storage tank is all transported to after gaslift, closes the ball valve and the catalyzer storage tank air inlet ball valve that are positioned between gaslift and catalyzer storage tank;
H. calculate catalyst recirculation amount;
I. regulate oil pump feeding rate to carry out setting device inlet amount according to catalyst recirculation amount, write down the now scale of oil pump, make its agent-oil ratio that reaches test requirements document, agent-oil ratio=catalyst recirculation amount/device inlet amount, then closes oil pump.
By technique scheme, the present invention at least has following advantages and beneficial effect:
1. improved catalytic cracking process method, does not need original device to carry out large transformation, only a catalyzer storage tank and an intake air line need be set below gaslift, reduces investment outlay.
2. while using the method actual measurement catalyst recirculation amount, only catalyzer to be measured need be discharged into catalyzer storage tank below gaslift, write down and put the time of catalyzer and the catalytic amount of emitting, both can calculate catalyst recirculation amount.
3. write down after the amount of putting catalyzer, the catalyzer blowback of putting into catalyzer storage tank can be returned to system, assurance system inner catalyst amount is not suffered a loss.
4. the method can be surveyed online the operation of catalyst recirculation amount before device heats up, to whole device operation system undisturbed.
5. before experiment, can determine agent-oil ratio numerical value: agent-oil ratio=catalyst recirculation amount/device inlet amount, install oil inlet quantity=catalyst recirculation amount/agent-oil ratio.In formula, agent-oil ratio is predefined parameter, and catalyst recirculation amount is at the good numerical value of experiment pre-test, then according to the latter's formula calculating device inlet amount.This just can be resolved variable (agent-oil ratio) that cannot be definite before an experiment by adjusting raw oil pump feeding rate easily.
6. use the method, in once testing, only need to measure one time catalyst recirculation amount, by adjusting stock oil feeding rate, can obtain the data under multiple different agent-oil ratios.Greatly reduce experiment number, reduce running cost, and data accurately, reliably.
7. this online actual measurement catalyst recirculation metering method is simple to operate, easy to control, can be widely used in technical study, evaluating catalyst, scientific experiment that oil, chemical industry, Coal Chemical Industry, biological wet goods carry out at middle-size and small-size lifting tube flowing catalytic cracking device.
Above-mentioned explanation is only the general introduction of technical solution of the present invention, in order to better understand technique means of the present invention, and can be implemented according to the content of specification sheets, and for above and other object of the present invention, feature and advantage can be become apparent, below especially exemplified by preferred embodiment, and coordinate accompanying drawing, be described in detail as follows.
Accompanying drawing explanation
Fig. 1 is the structural representation of improved catalytic cracking process device of the present invention.
[nomenclature]
1: catalyzer storage tank
2: reclaimable catalyst line of pipes inlet mouth
3: the inlet mouth that gaslift is set up
4: be positioned at the ball valve between gaslift and catalyzer storage tank
5: catalyzer storage tank air inlet ball valve
6: riser reactor 7: stripper
8: gaslift 9: revivifier
10: revivifier inlet mouth 11: regenerated catalyst line
12: reclaimable catalyst line of pipes 13: riser reactor opening for feed
14: generate oil gas and derive pipeline 15: flue gas is derived pipeline
Embodiment
Technique means and effect of taking for reaching predetermined goal of the invention for further setting forth the present invention, below in conjunction with accompanying drawing and preferred embodiment, to improved catalytic cracking process device and its embodiment of catalytic cracking process method, structure, method, step, feature and effect thereof of proposing according to the present invention, be described in detail as follows.
As shown in Figure 1, for improved catalytic cracking process device of the present invention, it is identical with catalytic cracking process device of the prior art, includes: reclaimable catalyst line of pipes inlet mouth 2, riser reactor 6, stripper 7, gaslift 8, revivifier 9, revivifier inlet mouth 10, regenerated catalyst line 11, reclaimable catalyst line of pipes 12, riser reactor opening for feed 13, generation oil gas are derived pipeline 14, flue gas is derived pipeline 15; Compared with prior art, improved catalytic cracking process device of the present invention also comprises: the inlet mouth 3 set up in gaslift 8 hypomeres, the catalyzer storage tank 1 arranging in gaslift lower end, be positioned at the ball valve 4 between this inlet mouth 3 and this catalyzer storage tank 1 and be positioned at the catalyzer storage tank air inlet ball valve 5 of this catalyzer storage tank lower end.More preferably, the material of this catalyzer storage tank can be resistant to elevated temperatures stainless steel; This inlet mouth 3 is arranged at gaslift 8 1/5 place below; This catalyzer storage tank height is about 100～300mm, and optimum is 300mm, and volume markings scope is 0～300mL, most preferably 0～100mL, but not as limit, can adjust flexibly according to actual needs.
In the time of application said apparatus actual measurement catalyst recirculation amount, ball valve 4 to be opened, the automatic inflow catalyst storage tank 1 of catalyzer, writes down and puts the catalyzer time, then closes ball valve 4, according to the catalytic amount of emitting and time, calculates catalyst recirculation amount.Can calculate device agent-oil ratio by catalyst recirculation amount and device inlet amount.Use after the method determining device catalyst recirculation amount, can, under device Operation Conditions, realize the evaluation experimental under different agent-oil ratios according to test requirements document setting device inlet amount at any time.Can reduce experiment number, reduce running cost, and data accurately, reliably.
Particularly, in the catalytic cracking process method of the present invention of application said apparatus, catalytic cracking can adopt this area routine techniques, catalytic cracking is by this area general technology conditional operation, specific as follows: temperature of reaction is 480 ℃～550 ℃, regeneration temperature is 650 ℃～750 ℃, and agent-oil ratio (by weight) is 4～10, reaction pressure 0.05MPa～0.5MPa.Stock oil is the stock oil that conventional catalytic cracking unit is used, as: wax oil and the heavy oil of oil, coal tar, the synthetic wet goods of F-T.
In one embodiment, the workflow of the improved catalytic cracking process method of the present invention is as follows:
(1) before testing, measure catalyst recirculation amount, can be according to step operation below:
A. close the ball valve on reclaimable catalyst line of pipes inlet mouth 2;
B. open the valve of the inlet mouth 3 that gaslift sets up, to ventilation (keeping the tolerance identical with inlet mouth 2) in gaslift simultaneously;
C. then open the ball valve 4 on connection line between gaslift and catalyzer storage tank, catalyzer flows into catalyzer storage tank 1, simultaneously writing time;
D. in the time that catalyzer inflow catalyzer storage tank 1 reaches a certain amount of, close ball valve 4 and 3, writing time simultaneously, and the ball valve of opening on reclaimable catalyst line of pipes inlet mouth 2 is ventilated in gaslift;
E. the catalyst weight converting in catalyzer storage tank 1;
F. open the ball valve 4 and 5 on connection line between gaslift and catalyzer storage tank, ventilate to catalyzer storage tank 1 by ball valve 5, catalyzer returns to gaslift by connection line between gaslift and catalyzer storage tank;
G. when the catalyzer in catalyzer storage tank 1 is all transported to after gaslift, close ball valve 4 and 5;
H. calculate catalyst recirculation amount;
I. regulate oil pump feeding rate (oil circuit is walked blow-down pipe) to carry out setting device inlet amount (writing down the now scale of oil pump) according to catalyst recirculation amount, make its agent-oil ratio that reaches test requirements document (agent-oil ratio=catalyst recirculation amount/device inlet amount), then close oil pump.
H. device heats up.In the time that each section of temperature reaches requirement of experiment value, start to reactor feed.
I. open oil pump (inlet amount should be the above-mentioned amount of adjusting) when fuel oil preheating to 280 ℃.Stock oil enters riser reactor bottom by opening for feed 13, contacts with high temperature (650 ℃～750 ℃) regenerated catalyst from revivifier, at approximately 500 ℃, reacts, and the oil gas of generation goes out device by generating oil gas derivation pipeline 14;
J. the catalyzer of inactivation enters stripper 7, enters reclaimable catalyst line of pipes 12 after stripping, the nitrogen that reclaimable catalyst enters through reclaimable catalyst line of pipes inlet mouth 2 by catalyst transport to gaslift 8.
K. catalyzer enters revivifier 9 through gaslift, and regeneration air enters revivifier via revivifier inlet mouth 10, burns charcoal and recover catalyst activity at 650 ℃～750 ℃, and flue gas is derived pipeline 15 by flue gas and gone out device;
The catalyzer of L. having regenerated enters riser reactor bottom by regenerated catalyst line 11, recycles.
Embodiment:
Refer to Fig. 1.
In the time setting experimental program, set each processing parameter.As: temperature of reaction, fuel oil preheating temperature, regeneration temperature, agent-oil ratio etc.; Then under cold conditions, carry out the mensuration of catalyst recirculation amount, then determine oil pump inlet amount.
Before experiment, each catalytic cracking unit air input is given to certain value, makes catalyzer can in reaction-regeneration system, form stable ciculation fluidized state.Then close the ball valve on reclaimable catalyst line of pipes inlet mouth 2; Open the valve of the inlet mouth 3 that gaslift sets up, to ventilation (keeping the tolerance identical with inlet mouth 2) in gaslift simultaneously; Then open the ball valve 4 on connection line between gaslift and catalyzer storage tank, catalyzer flows in storage tank 1, simultaneously writing time; In the time that catalyzer inflow storage tank 1 reaches a certain amount of, close ball valve 4 and 3, writing time simultaneously, and open ball valve 2 and ventilate in gaslift; Catalyst weight in conversion catalyzer storage tank 1; Open the ball valve 4 and 5 on connection line between gaslift and catalyzer storage tank, ventilate to catalyzer storage tank 1 by ball valve 5, catalyzer returns to gaslift by connection line between gaslift and catalyzer storage tank.When the catalyzer in catalyzer storage tank 1 is all transported to after gaslift, close ball valve 4 and 5; Device recovers normal fluidized state.
Calculate catalyst recirculation amount: read the volume in catalyzer storage tank, then calculate the weight of catalyzer according to density of catalyst, the catalytic amount of emitting in the unit time had been both catalyst recirculation amount.
Regulate oil pump feeding rate (adjusting under emptying condition) to carry out setting device inlet amount according to catalyst recirculation amount, make its agent-oil ratio that reaches test requirements document (agent-oil ratio=catalyst recirculation amount/device inlet amount).
After determining device inlet amount, first stop oil pump, device heats up; When each section of temperature of device is while rising to requirement of experiment value, start oil pump to charging in device; After device running is stable, can do constantly, writing time and each experiment condition are as experimental datas such as each section of temperature, tolerance, pressure; Per half an hour or a hour record primary device operating parameters during constant gather respectively reacted gas simultaneously and flue gas sample does compositional analysis; When experiment finishes, record above-mentioned each parameter and collect oil sample analysis.
Catalytic cracking product is gas, gasoline, diesel oil, wax oil and coke.Table 1, table 2, table 3 are respectively stock oil character, processing condition, test-results.Wherein, table 3 is the catalytically cracked stock evaluation experimental results under three different agent-oil ratios obtaining of this experiment.
Table 1 stock oil character
| Project | Data |
| Density (20 ℃), g.cm -3 | 0.8958 |
| Carbon residue, wt% | 0.01 |
| Sulphur, wt% | 0.14 |
| Nitrogen, μ gg -1 | 16 |
| Metallic element, μ gg -1：Ni/V | 0.01/0.01 |
| Four proximate analyses, wt% | |
| Stable hydrocarbon | 43.2 |
| Aromatic hydrocarbon | 56.1 |
| Colloid | 0.7 |
| Bituminous matter | 0.0 |
| Boiling range, 520 ℃ of %:< | 89.0 |
| ＞520℃ | 11.0 |
Table 2 technological experiment condition
Table 3 experimental result
The above, it is only preferred embodiment of the present invention, not the present invention is done to any pro forma restriction, although the present invention discloses as above with preferred embodiment, but not in order to limit the present invention, any those skilled in the art, do not departing within the scope of technical solution of the present invention, when can utilizing the method for above-mentioned announcement and technology contents to make a little change or being modified to the equivalent embodiment of equivalent variations, in every case be the content that does not depart from technical solution of the present invention, any simple modification of above embodiment being done according to technical spirit of the present invention, equivalent variations and modification, all still belong in the scope of technical solution of the present invention.
Claims (6)
1. an improved catalytic cracking process device, comprising: reclaimable catalyst line of pipes inlet mouth (2), riser reactor (6), stripper (7), gaslift (8), revivifier (9), revivifier inlet mouth (10), regenerated catalyst line (11), reclaimable catalyst line of pipes (12), riser reactor opening for feed (13), generation oil gas are derived pipeline (14), flue gas is derived pipeline (15); It is characterized in that this improved catalytic cracking process device also comprises:
The inlet mouth (3) set up in gaslift (8) hypomere, the catalyzer storage tank (1) arranging in gaslift lower end, be positioned at the ball valve (4) between this inlet mouth (3) of setting up in gaslift (8) hypomere and this catalyzer storage tank (1) and be positioned at the catalyzer storage tank air inlet ball valve (5) of this catalyzer storage tank lower end.
2. improved catalytic cracking process device as claimed in claim 1, is characterized in that the inlet mouth (3) of setting up in gaslift (8) hypomere is arranged at 1/5 place below gaslift (8).
3. improved catalytic cracking process device as claimed in claim 1, is characterized in that this catalyzer storage tank (1) is highly 100～500mm, and volume markings scope is 0～300mL.
4. improved catalytic cracking process device as claimed in claim 3, is characterized in that this catalyzer storage tank (1) is highly 300mm, and volume markings scope is 0～100mL.
5. a catalytic cracking process method for the catalytic cracking process device described in the arbitrary claim of application rights requirement 1-4, is characterized in that comprising the following steps:
Open the ball valve (4) being positioned between this inlet mouth (3) of setting up in gaslift (8) hypomere and this catalyzer storage tank (1), the automatic inflow catalyst storage tank of catalyzer (1), write down the time that puts catalyzer, then close this and be positioned at the ball valve (4) between this inlet mouth (3) and this catalyzer storage tank (1), according to the catalytic amount of emitting and time, calculate catalyst recirculation amount.
6. catalytic cracking process method as claimed in claim 5, is characterized in that comprising the following steps:
A. close the ball valve on reclaimable catalyst line of pipes inlet mouth (2);
B. open the valve of the inlet mouth (3) that gaslift (8) sets up simultaneously, in gaslift, ventilate, keep the tolerance identical with inlet mouth (2);
C. then open the ball valve (4) between gaslift (8) and catalyzer storage tank (1), catalyzer flows into catalyzer storage tank (1), simultaneously writing time;
D. in the time that catalyzer flows into catalyzer storage tank (1) and reaches volume range and be a certain numerical value between 0～100mL, the inlet mouth (3) of closing the ball valve (4) between gaslift (8) and catalyzer storage tank (1) and setting up in gaslift (8), writing time simultaneously, and the ball valve of opening on reclaimable catalyst line of pipes inlet mouth (2) is ventilated in gaslift;
E. the catalyst weight converting in catalyzer storage tank (1);
F. open the ball valve (4) and the catalyzer storage tank air inlet ball valve (5) that are positioned between gaslift (8) and catalyzer storage tank (1), by catalyzer storage tank air inlet ball valve (5), to catalyzer storage tank (1) ventilation, catalyzer returns to gaslift (8) by the connection line between gaslift (8) and catalyzer storage tank (1);
G. after the catalyzer in catalyzer storage tank (1) is all transported to gaslift (8), close the ball valve (4) and the catalyzer storage tank air inlet ball valve (5) that are positioned between gaslift (8) and catalyzer storage tank (1);
H. calculate catalyst recirculation amount;
I. regulate oil pump feeding rate to carry out setting device inlet amount according to catalyst recirculation amount, write down the now scale of oil pump, make its agent-oil ratio that reaches test requirements document, agent-oil ratio=catalyst recirculation amount/device inlet amount, then closes oil pump.
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| CN103849423B (en) | 2015-06-17 |
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