CN203342552U

CN203342552U - Settler-free two-stage cyclone series gas-solid separation equipment

Info

Publication number: CN203342552U
Application number: CN 201320408483
Authority: CN
Inventors: 刘英聚
Original assignee: Individual
Current assignee: Individual
Priority date: 2013-07-09
Filing date: 2013-07-09
Publication date: 2013-12-18
Anticipated expiration: 2023-07-09

Abstract

The utility model provides settler-free two-stage cyclone series gas-solid separation equipment, belonging to the technical field of petrochemical industry and fluidization equipment and being used to solve the problems of coking of settlers of reactors and excessive thermal cracking of oil gases. The equipment comprises a riser, two-stage separators, diplegs and wing valves. The equipment is characterized in that the equipment is settler-free, adopts the external two-stage cyclone separators which are connected in series and is provided with catalyst guide facilities; the catalyst guide facilities are communicated with the wing valves and the first-stage cyclone separator or a stripping section; the diplegs adopt straight pipe structures and the wing valves are installed at the lower ends of the diplegs. The equipment has the advantages that 1. the problem of coking of settlers is solved; 2. the gas-solid separation efficiency of the closed cyclone quick separators is above 98%; the oil gas standing time is less than 5 seconds; the excessive thermal cracking reaction of the oil gases is obviously reduced; the dry gas yield is reduced; the product yield is increased; 3. the diplegs discharge materials smoothly and avoid gas mixing; 4. the equipment is convenient to overhaul and the equipment investment is substantially reduced. The equipment is applied to catalytic cracking and catalytic pyrolysis devices and the like.

Description

A kind of without settler two-stage eddy flow series connection gas-solid separation equipment

Technical field

The utility model belongs to petrochemical industry, fluidizing apparatus technical field, particularly a kind of without settler two-stage eddy flow series connection gas-solid separation equipment.

Background technology

Refinery catalytic cracking unit's riser reactor outlet all is provided with fast gas-solid separator, for realizing oil gas, separates fast, stops cracking reaction with catalyst.Umbrella crown is arranged in early days, fall L, the structural shape such as T-shaped, separative efficiency is generally 70%～80%, in the settler larger at diameter of the oil gas after separation, rises at a slow speed, then enters settler top second-stage separator.At 20～50 seconds, still there are the reactions such as excessive thermal cracking, condensation in this part oil gas in the settler time of staying under 500 ℃ of high temperature, affects yield of light oil, when processing heavy oil even in the settler coking.Some device riser reactor outlets arrange 1～4 elementary cyclone separator (be called for short and slightly revolve), efficiency can reach more than 95%, thick spin material leg is to discharge catalyst under the positive differential pressure condition, discharge 15%～30% oil gas simultaneously, this part oil gas rises at a slow speed the top time of staying at 30～90 seconds in the settler bottom, have the significantly reactions such as excessively thermal cracking, condensation under 500 ℃ of high temperature, affect yield of light oil, during processing heavy oil even in the settler coking.Some devices will slightly revolve riser and extend up near the second-stage separator entrance, this scheme oil gas main flow time of staying significantly shortens, but a small amount of oil gas that thick spin material leg is discharged is the settler time of staying longer (reaching 100 seconds), and settler has the more serious trend of coking.

For reducing oil gas in the settler time of staying, and the reduction equipment investment, patent 200710000133.9 has been developed pipe precipitator catalytic cracking unit, the patent 200710000132.4 that a kind of thick medial rotation puts and has been developed a kind of external pipe precipitator catalytic cracking unit that slightly revolves.These two technology adopt pipe precipitator, the quick separation facilities of leg outlet adopts conventional thick cyclone separator, thick spin material leg outlet is arranged on the stripping section top position, the oil gas speed that thick spin material leg is discharged is higher, to catalyst, disturbance increases this zone density of catalyst, second-stage separator catalyst at inlet density is increased, finally cause catalyst taking-out amount to increase.The second-stage separator dipleg adopts the broken pipe structure, flutter valve is not set in addition, is unfavorable for that fine powder flows, easily collaborates.

200610162084.4 1 kinds of catalytic cracker without settler of patent, this technical scheme has been cancelled settler, and the quick separation facilities of leg outlet adopts cyclone separator, and second-stage separator is external.In this scheme, the second-stage separator dipleg adopts the broken pipe structure, flutter valve is not set, and is unfavorable for that fine powder flows, easily collaborates.Patent 200610162095.2 catalytic cracker without settler, this technical scheme has been cancelled settler, and the quick separation facilities of leg outlet adopts conventional thick cyclone separator, and second-stage separator is external.In this scheme, the second-stage separator dipleg adopts the broken pipe structure to be unfavorable for that fine powder flows, flutter valve be placed in stripping section easily catalyzed dose bury and cause that the blanking of second-stage separator dipleg is smooth, catalyst runs damage in a large number.

Summary of the invention

The purpose of this utility model is to provide a kind of without settler two-stage eddy flow series connection gas-solid separation equipment, solves oil gas coking and excessive thermal cracking in settler, and discharge is smooth, avoid collaborating, and is convenient to overhaul of the equipments, significantly reduces equipment investment.

The utility model solves the technical scheme that its technical problem adopts: comprise riser, one-level gas-solid separator, secondary gas-solid separator, dipleg, flutter valve, stripping section, it is characterized in that: without settler, adopt external two-stage cyclone separator series connection, external catalyst parallel works is set; The primary cyclone lower end is connected with stripping section, and the catalyst parallel works is communicated with flutter valve and primary cyclone bottom or stripping section, and dipleg adopts straight tube structure and flutter valve is installed in lower end.

Further, 1～6 of primary cyclone, 1～10 of secondary cyclone separator, the secondary cyclone separator is arranged in around primary cyclone.

Further, cyclone separator comprises seal closure and cyclone; Seal closure is straight tube structure or cone structure or straight tube and cone combining structure, and the seal closure upper end is provided with blast pipe, and lower end is connected with stripping section or dipleg; During for the coaxial-type device, primary seal cover lower end closed, be connected and be communicated with stripping section by spent agent carrier pipe and stripping gas discharge pipe, spent agent carrier pipe and stripping gas discharge pipe are inclined tube or folding shape pipe, and the seal closure bottom arranges the fluidizing agent endless tube or do not arrange; Cyclone is established 2～8 runners, and runner is bend pipe structure or worm frame, and cross section is rectangle or trapezoidal, runner is horizontally disposed with or downward-sloping setting, exhaust isolating cylinder or isolation cone are set or do not arrange, cyclone is arranged on seal closure inside, and is connected with riser or air inlet pipe upper end.

Further, the catalyst parallel works is passage, cross section is geometric form or combination shape or gradual change shape or abnormity, number of channels is identical with the second-stage separator number of units or not identical, the passage lower end is connected with primary seal cover bottom or stripping section top, wrap up flutter valve seal upper end, and flow-guiding channel arranges the steam ozzle or do not arrange.

Further, when the secondary cyclone separator equates with the primary cyclone number of units, two-stage cyclone separator arranged superposed, every secondary seal cover bottom arranges 1～6 dipleg.

Further, when the settler plant modification is arranged, can retain former settler bottom one piece housing, external two-stage cyclone separator is set, steam loop is set in the lower piece housing of reservation or does not arrange.

Further, riser is feedstock oil master riser, or recycle oil riser or gasoline rising pipe or subsidiary riser, or itself and the feedstock oil master riser riser after merging.

The utility model innovative point and good effect:

The utility model innovative point is: 1, without settler, adopt external two-stage cyclone separator series connection; 2, be provided with the catalyst parallel works, be communicated with flutter valve and primary cyclone or stripping section; 3, dipleg adopts straight tube structure and flutter valve is installed in lower end.

The utility model good effect is: 1, eliminated the settler coking problem; 2, airtight vortex quick separation gas solid separation efficiency reaches more than 98%, and the oil gas time of staying is less than 5 seconds, obviously reduces the excessive heat cracking reaction of oil gas, reduces dry gas yied, improves product yield; 3, the dipleg discharge smooth, avoid collaborating; 4, be convenient to overhaul of the equipments, significantly reduce equipment investment.

The accompanying drawing explanation

Fig. 1 is a kind of without settler two-stage eddy flow series connection gas-solid separation equipment schematic diagram.

1-outlet header, 2-secondary blast pipe, 3-second cyclone, 4-secondary seal cover, 5-secondary air inlet pipe, 6-one-level blast pipe, 7-one-level cyclone, 8-primary seal cover, 9-dipleg, 10-flutter valve, 11-catalyst mozzle, 12-riser, 13-stripping section.

Fig. 2 is another kind of without settler two-stage eddy flow series connection gas-solid separation equipment schematic diagram.

1-outlet header, 2-secondary blast pipe, 3-second cyclone, 4-secondary seal cover, 5-secondary air inlet pipe, 6-one-level blast pipe, 7-one-level cyclone, 8-primary seal cover, 9-dipleg, 10-flutter valve, the 12-riser, 13-stripping section, 14-steam loop, the former settler hypomere of 15-.

Fig. 3 is another kind of without settler two-stage eddy flow series connection gas-solid separation equipment schematic diagram.

The 1-division board, 2-secondary blast pipe, 3-second cyclone, 4-secondary seal cover, 5-one-level blast pipe, 6A-fluidizing agent endless tube, 7-one-level cyclone, 8-primary seal cover, 9-dipleg, 10-flutter valve, 11-catalyst mozzle, 12-riser, 13-stripping section.

Fig. 4 is another kind of without settler two-stage eddy flow series connection gas-solid separation equipment schematic diagram.

The 1-division board, 2-secondary blast pipe, 3-second cyclone, 4-secondary seal cover, 5-one-level blast pipe, 6A-fluidizing agent endless tube, 7-one-level cyclone, 8-primary seal cover, 9-dipleg, 10-flutter valve, the 12-riser, 13-stripping section, 14-steam loop, the former settler hypomere of 15-.

The specific embodiment

See Fig. 1～Fig. 4, riser 12 upper ends are stretched into primary seal cover 8 inside and are connected with one-level cyclone 7; Primary seal cover 8 adopts the straight tube structure, and upper end is connected with second cyclone 3 through one-level blast pipe 6 and secondary air inlet pipe 5; Second cyclone 3 outsides are provided with secondary seal cover 4, and secondary seal cover 4 adopts the straight tube structure, and its lower end is connected with dipleg 9 and flutter valve 10.

Fig. 1, be without the settler typical scenario, 1 primary cyclone, some secondary cyclone separators are arranged in around it, primary seal cover 8 lower ends are connected with stripping section 13 upper ends, and catalyst mozzle 11 lower ends are connected with primary seal cover 8 bottoms, and upper end is by flutter valve 10 parcels.

Fig. 2, be that settler plant modification scheme is arranged, and primary seal cover 8 middle parts are connected with former settler hypomere 15 top covers, and primary seal cover 8, dipleg 9 bottoms reach former settler hypomere 15 inside, and former settler hypomere 15 tops are provided with steam loop 14.

Fig. 3 is that secondary seal cover 4 bottoms are provided with fluidizing agent endless tube 6A without settler two-stage cyclone separator tandem plan, be provided with 2 diplegs 9, flutter valve 10 is installed in dipleg 9 lower ends, and catalyst mozzle 11 lower ends are connected with primary seal cover 8 bottoms, and upper end is by flutter valve 10 parcels.

Fig. 4, be to have the settler device to adopt two-stage cyclone separator series connection modification scheme, and primary seal cover 8 middle parts are connected with former settler hypomere 15 top covers, and bottom reaches its inside; 2 dipleg 9 upper ends are connected with secondary seal cover 4 bottoms, and lower end reaches former settler hypomere 15 inside and is connected with flutter valve 10.

Referring to Fig. 1～Fig. 4, the mixture of reaction oil gas, catalyst flows out and enters one-level cyclone 7 from riser 12 outlets, then tangentially enter in primary seal cover 8, oil gas and catalyst rotate in primary seal cover 8, carry out gas solid separation under centrifugal action, its separative efficiency reaches more than 98%.First class purification gas is discharged from one-level blast pipe 6, through secondary air inlet pipe 5, enters second cyclone 3, and the gas tangential direction enters in secondary seal cover 4 and rotates, and again carries out centrifugation, and purified gas is discharged through secondary blast pipe 2; The catalyst that one-level separates falls into the stripping section 13 of below along primary seal cover 8 inwalls.The catalyst that the secondary cyclonic separation is got off falls into the dipleg 9 of below along secondary seal cover 4 inwalls, enter stripping section 13 (Fig. 2, Fig. 4 directly enter stripping section 13 through flutter valve 10) through flutter valve 10, catalyst mozzle 11, a small amount of oil gas that flutter valve 10 is discharged enters primary seal cover 8 from end opening together with stripping gas.

Claims

1. one kind without settler two-stage eddy flow series connection gas-solid separation equipment, comprise riser, one-level gas-solid separator, secondary gas-solid separator, dipleg, flutter valve, stripping section, it is characterized in that: without settler, adopt external two-stage cyclone separator series connection, external catalyst parallel works is set; The primary cyclone lower end is connected with stripping section, and the catalyst parallel works is communicated with flutter valve and primary cyclone bottom or stripping section, and dipleg adopts straight tube structure and flutter valve is installed in lower end.

2. equipment according to claim 1 is characterized in that: 1～6 of primary cyclone, and 1～10 of secondary cyclone separator, the secondary cyclone separator is arranged in around primary cyclone.

3. equipment according to claim 1, it is characterized in that: cyclone separator comprises seal closure and cyclone; Seal closure is straight tube structure or cone structure or straight tube and cone combining structure, and the seal closure upper end is provided with blast pipe, and lower end is connected with stripping section or dipleg; During for the coaxial-type device, primary seal cover lower end closed, be connected and be communicated with stripping section by spent agent carrier pipe and stripping gas discharge pipe, spent agent carrier pipe and stripping gas discharge pipe are inclined tube or folding shape pipe, and the seal closure bottom arranges the fluidizing agent endless tube or do not arrange; Cyclone is established 2～8 runners, and runner is bend pipe structure or worm frame, and cross section is rectangle or trapezoidal, runner is horizontally disposed with or downward-sloping setting, exhaust isolating cylinder or isolation cone are set or do not arrange, cyclone is arranged on seal closure inside, and is connected with riser or air inlet pipe upper end.

4. equipment according to claim 1, it is characterized in that: the catalyst parallel works is passage, cross section is geometric form or combination shape or gradual change shape or abnormity, number of channels is identical with the second-stage separator number of units or not identical, the passage lower end is connected with primary seal cover bottom or stripping section top, wrap up flutter valve seal upper end, and flow-guiding channel arranges the steam ozzle or do not arrange.

5. equipment according to claim 1 and 2 is characterized in that: when the secondary cyclone separator equates with the primary cyclone number of units, and two-stage cyclone separator arranged superposed, every secondary seal cover bottom arranges 1～6 dipleg.

6. equipment according to claim 1 is characterized in that: when the settler plant modification is arranged, can retain former settler bottom one piece housing, external two-stage cyclone separator is set, steam loop is set in the lower piece housing of reservation or does not arrange.

7. equipment according to claim 1, it is characterized in that: riser is feedstock oil master riser, or recycle oil riser or gasoline rising pipe or subsidiary riser, or itself and the feedstock oil master riser riser after merging.