CN110038487B - Riser reactor nozzle convenient to overhaul and disassemble and assemble - Google Patents
Riser reactor nozzle convenient to overhaul and disassemble and assemble Download PDFInfo
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- CN110038487B CN110038487B CN201910434801.1A CN201910434801A CN110038487B CN 110038487 B CN110038487 B CN 110038487B CN 201910434801 A CN201910434801 A CN 201910434801A CN 110038487 B CN110038487 B CN 110038487B
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- 239000000945 filler Substances 0.000 claims abstract description 14
- 238000011049 filling Methods 0.000 claims description 12
- 238000009434 installation Methods 0.000 claims description 12
- 239000000463 material Substances 0.000 claims description 10
- 239000000919 ceramic Substances 0.000 claims description 4
- 239000000835 fiber Substances 0.000 claims description 4
- 239000003054 catalyst Substances 0.000 abstract description 23
- 238000004939 coking Methods 0.000 abstract description 23
- 230000000149 penetrating effect Effects 0.000 abstract description 5
- 230000000903 blocking effect Effects 0.000 abstract description 4
- 238000000034 method Methods 0.000 abstract description 4
- 230000008569 process Effects 0.000 abstract description 4
- 238000004523 catalytic cracking Methods 0.000 description 5
- 230000006872 improvement Effects 0.000 description 4
- 238000013461 design Methods 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 238000002156 mixing Methods 0.000 description 3
- 238000005504 petroleum refining Methods 0.000 description 3
- 239000002994 raw material Substances 0.000 description 3
- 238000000889 atomisation Methods 0.000 description 2
- 238000001816 cooling Methods 0.000 description 2
- 230000003111 delayed effect Effects 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 230000008595 infiltration Effects 0.000 description 2
- 238000001764 infiltration Methods 0.000 description 2
- 238000007689 inspection Methods 0.000 description 2
- 239000007788 liquid Substances 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 239000012466 permeate Substances 0.000 description 2
- 239000000047 product Substances 0.000 description 2
- 230000002035 prolonged effect Effects 0.000 description 2
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical group [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 238000009833 condensation Methods 0.000 description 1
- 230000005494 condensation Effects 0.000 description 1
- 238000005336 cracking Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 238000004821 distillation Methods 0.000 description 1
- 238000009826 distribution Methods 0.000 description 1
- 239000010419 fine particle Substances 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 229940029329 intrinsic factor Drugs 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 230000035515 penetration Effects 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 238000010791 quenching Methods 0.000 description 1
- 230000000171 quenching effect Effects 0.000 description 1
- 239000012429 reaction media Substances 0.000 description 1
- 238000011084 recovery Methods 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 238000007670 refining Methods 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- 239000002904 solvent Substances 0.000 description 1
- 238000001179 sorption measurement Methods 0.000 description 1
- 229910001220 stainless steel Inorganic materials 0.000 description 1
- 239000010935 stainless steel Substances 0.000 description 1
- 238000009834 vaporization Methods 0.000 description 1
- 230000008016 vaporization Effects 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J8/00—Chemical or physical processes in general, conducted in the presence of fluids and solid particles; Apparatus for such processes
- B01J8/0015—Feeding of the particles in the reactor; Evacuation of the particles out of the reactor
- B01J8/004—Feeding of the particles in the reactor; Evacuation of the particles out of the reactor by means of a nozzle
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J8/00—Chemical or physical processes in general, conducted in the presence of fluids and solid particles; Apparatus for such processes
- B01J8/08—Chemical or physical processes in general, conducted in the presence of fluids and solid particles; Apparatus for such processes with moving particles
-
- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10G—CRACKING HYDROCARBON OILS; PRODUCTION OF LIQUID HYDROCARBON MIXTURES, e.g. BY DESTRUCTIVE HYDROGENATION, OLIGOMERISATION, POLYMERISATION; RECOVERY OF HYDROCARBON OILS FROM OIL-SHALE, OIL-SAND, OR GASES; REFINING MIXTURES MAINLY CONSISTING OF HYDROCARBONS; REFORMING OF NAPHTHA; MINERAL WAXES
- C10G11/00—Catalytic cracking, in the absence of hydrogen, of hydrocarbon oils
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E30/00—Energy generation of nuclear origin
- Y02E30/30—Nuclear fission reactors
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- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Organic Chemistry (AREA)
- Oil, Petroleum & Natural Gas (AREA)
- Engineering & Computer Science (AREA)
- General Chemical & Material Sciences (AREA)
- Production Of Liquid Hydrocarbon Mixture For Refining Petroleum (AREA)
- Devices And Processes Conducted In The Presence Of Fluids And Solid Particles (AREA)
Abstract
A riser reactor nozzle convenient to overhaul and disassemble comprises a nozzle main body, a nozzle sleeve, a positioning ring, an internal gas-blocking ring, an external gas-blocking ring and a conical liner retainer ring; the positioning ring is fixed on the inner wall of the nozzle sleeve, and the internal gas blocking ring is clamped on the outer wall of the nozzle main body and has a gap with the inner wall of the nozzle sleeve; the outer blocking ring is clamped on the inner wall of the nozzle sleeve and a gap is formed between the outer blocking ring and the outer wall of the nozzle main body; the space surrounded by the positioning ring, the internal gas-blocking ring, the external gas-blocking ring, the nozzle sleeve and the nozzle main body is filled with flexible filler, the space surrounded by the external gas-blocking ring, the end part of the nozzle sleeve and the outlet end of the nozzle main body is filled with a first wear-resistant lining, the outer wall of the nozzle sleeve is provided with a second wear-resistant lining, and the second wear-resistant lining is limited by a conical lining retainer ring. The invention can prevent oil gas and oil-gas catalyst from penetrating between the nozzle main body and the nozzle sleeve and reduce coking at the end part of the nozzle, thereby the nozzle main body can be quickly and nondestructively removed and quickly restored in the overhauling process.
Description
Technical Field
The invention belongs to the field of petroleum refining equipment, and particularly relates to a nozzle assembly for riser reactor equipment in a catalytic cracking device.
Background
Catalytic cracking devices occupy an important position in China, the number of catalytic cracking devices operated by petroleum refining enterprises in China is not less than 180, along with the improvement of oil refining technology and process level and the requirement on the improvement of product yield, heavy components in catalytic cracking raw oil are more and more, and the blending ratio of atmospheric residuum, vacuum residuum, solvent deasphalting and wax oil in main raw materials is continuously increased. Riser reactors are critical equipment in which there are 2 to 8 or even more feed nozzles depending on the throughput. The heavy component is poorly atomized, so that coking of a riser and even a nozzle is aggravated, in recent years, along with the improvement of a nozzle technology, the coking rate is delayed, the starting time is prolonged, but unreasonable nozzle sleeve structures are ignored, external coking of the nozzle and coking of filling materials between a nozzle main body and the nozzle sleeve are caused, and the nozzle is difficult to take out in the process of inspection and overhaul, so that the nozzle structure is damaged. Because the purchase cost of the nozzle is high, the processing period is long, and the overhaul period of the device is short, the problem of the nozzle belt continues to run, the coking rate of other equipment is quickened, the product yield is influenced, or the overhaul period is prolonged, and the productivity is reduced.
According to the properties of raw materials, as the mixing ratio is improved, the heavy components of the reaction oil gas are improved, the higher the final distillation point is, the more difficult vaporization is, unvaporized oil is easy to form, the more the number of wet catalysts for absorbing unvaporized oil is, the wet catalysts are adhered to the surfaces of equipment to perform coking reaction, the coking is increased, the higher the heavy components in the oil gas are, the higher the partial pressure and the dew point of the heavy components are, the condensation coking is easy to occur, and the high carbon residue value is an intrinsic factor of the coking; the "wet" catalyst formation principle described above is, in turn: the catalyst is powdery fine particles, raw oil is sprayed out from a nozzle at high speed through superheated steam to form vaporous liquid, and after the vaporous liquid is combined with a dry catalyst, cracking reaction is carried out, light components are separated, heavy components cannot be decomposed and wrapped on the surface of the catalyst, and thus a wet catalyst is formed. The uneven flow field, temperature field and concentration field exist around the nozzle body and the nozzle sleeve, and it is the environment where the oil gas is located that reaches the coking condition, and the coking of the end part of the nozzle body is caused, and these gradient distributions are the external factors of the coking of the nozzle.
As shown in fig. 1, a nozzle structure of a conventional riser reactor comprises a nozzle body 1 and a nozzle sleeve 2 mounted on the nozzle body, wherein a flexible filler 3 is filled between the nozzle body 1 and the nozzle sleeve 2, and the outer wall of the nozzle sleeve 2 is provided with a wear-resistant lining and is fixed by an annular lining retainer ring 21. In the petroleum refining industry, the design of the nozzle sleeve part of the riser reactor by each design unit is that of the lining retainer ring in fig. 1, namely, an annular retainer ring, which has a large sectional area in the medium flow direction and is easy to form vortex with the end part of the nozzle body, so that serious coking occurs at the edge of the nozzle outlet. Furthermore, the flexible filling material between the nozzle main body and the nozzle sleeve can not be taken out due to overlarge friction resistance because of cooling and condensing into blocks under the condition of shutdown cooling due to the adsorption of oil gas or oil-containing catalyst.
Disclosure of Invention
In order to overcome the defects of the prior art, the invention provides the riser reactor nozzle which can conveniently and rapidly dismantle the nozzle main body for detection and quick recovery in the overhaul process, and can also prevent oil gas and oil-containing catalyst from penetrating between the nozzle main body and the nozzle sleeve.
The invention aims at solving the technical problems by adopting the following technical scheme. The invention provides a lifting pipe reactor nozzle convenient to overhaul and disassemble, which comprises a nozzle main body, a nozzle sleeve, a positioning ring, an internal gas-blocking ring, an external gas-blocking ring and a conical lining retainer ring, wherein the nozzle sleeve is fixed on a shell of the lifting pipe reactor, and the nozzle main body and the nozzle sleeve are inserted; the positioning ring is welded and fixed on the inner wall of the nozzle sleeve, and a gap is formed between the positioning ring and the nozzle main body; the internal gas-blocking ring is in an open circular shape, first mounting holes are formed in two ends of the opening, the opening of the internal gas-blocking ring is closed and elastic inwards in a free state, and the internal gas-blocking ring is clamped on the outer wall of the nozzle main body and has a gap with the inner wall of the nozzle sleeve when being mounted; the outer gas-blocking ring is in an open circular ring shape, second mounting holes are formed in two ends of the opening, the opening of the outer gas-blocking ring is open and elastic outwards in a free state, and the outer gas-blocking ring is clamped on the inner wall of the nozzle sleeve and has a gap with the outer wall of the nozzle main body during mounting; the positioning ring, the internal gas-blocking ring and the external gas-blocking ring are arranged in parallel, the internal gas-blocking ring is located between the positioning ring and the external gas-blocking ring, flexible filling materials are filled in a space surrounded by the positioning ring, the internal gas-blocking ring, the external gas-blocking ring, the nozzle sleeve and the nozzle main body, a first wear-resistant lining is filled in the space surrounded by the external gas-blocking ring, the end part of the nozzle sleeve and the outlet end of the nozzle main body, a second wear-resistant lining is arranged on the outer wall of the nozzle sleeve, the second wear-resistant lining is limited by the conical lining retainer ring, and the conical lining retainer ring is welded at the end part of the nozzle sleeve.
The object of the invention is further achieved by the following technical measures.
The riser reactor nozzle, wherein the nozzle body is connected with the sleeve flange of the nozzle sleeve through the nozzle flange so as to realize the detachable and fixedly connection of the nozzle body and the sleeve flange of the nozzle sleeve.
The riser reactor nozzle, wherein the gap between the positioning ring and the nozzle body is 1mm.
The riser reactor nozzle, wherein the gap between the outer diameter of the internal gas-blocking ring and the inner wall of the nozzle sleeve is 2mm.
In the riser reactor nozzle, the gap between the inner diameter of the outer gas blocking ring and the outer wall of the nozzle body is 2mm.
The riser reactor nozzle, wherein the conical liner retainer ring is conical and the conical surface direction of the installed conical liner retainer ring is the same as the medium flow direction.
The riser reactor nozzle as described above, wherein the opening gap of the inner gas-blocking ring is 1.5mm to 2mm.
The riser reactor nozzle as described above, wherein the opening gap of the outer choke ring is 2mm to 2.5mm.
The riser reactor nozzle as described above wherein the flexible filler is ceramic fiber.
The riser reactor nozzle described above wherein the openings of the inner and outer baffle rings are staggered 180 ° after installation.
By means of the technical scheme, compared with the prior art, the invention has at least the following beneficial effects:
1. the invention uses the aerodynamic principle, on one hand, the circular lining retainer ring in the existing horizontal installation state is changed into the conical lining retainer ring, and the installation direction of the conical surface is the same as the medium flow direction, thereby reducing the cross section area of the whole nozzle in the medium flow direction, realizing the reduction of the flow resistance at the end part of the nozzle sleeve, and relatively reducing the flow resistance of the medium flow at the end part of the nozzle sleeve. On the other hand, by filling the first wear-resistant lining, the surface area of the end face coking part is reduced, the smoothness is increased to reduce the generation of vortex, and therefore the coking condition is greatly reduced, and the atomization effect of the nozzle is affected.
2. According to the invention, the S-shaped channel formed by the positioning ring, the internal gas-blocking ring and the external gas-blocking ring in the gap between the nozzle sleeve and the nozzle main body is utilized to greatly slow down the circulation speed of the oil gas or oil-containing catalyst, and the compacted flexible filler is utilized to prevent the oil gas or oil-containing catalyst from penetrating into the gap between the nozzle sleeve and the nozzle main body, which is not filled with the flexible filler, and prevent the oil gas and the oil-containing catalyst from being cooled, solidified and coked so that the nozzle main body cannot be taken out. Because the coking amount at the end part of the nozzle is small, the penetration of oil gas and oil-gas-containing catalyst into the compacted flexible filler is greatly reduced, and the friction area is reduced, the nozzle main body can be easily pulled out, and the purpose of quickly and nondestructively dismantling the nozzle main body is achieved.
3. The inner and outer gas-blocking rings adopted in the invention have high temperature resistance and certain elasticity, the opening gap of the two gas-blocking rings can be closed due to thermal expansion at high temperature, and the end surfaces at the two ends of the opening are provided with mounting holes, so that the tool can be conveniently used for dismounting and mounting.
The foregoing description is only an overview of the present invention, and is intended to be implemented in accordance with the teachings of the present invention, as well as the preferred embodiments thereof, together with the following detailed description of the invention given in conjunction with the accompanying drawings.
Drawings
FIG. 1 is a schematic cross-sectional view of a nozzle of a conventional riser reactor.
Fig. 2 is a schematic cross-sectional structure of the present invention.
FIG. 3 is a schematic cross-sectional view of a nozzle sleeve and nozzle tip of the present invention.
Fig. 4 is a schematic view of the shape of the inner gas-blocking ring in the present invention.
Fig. 5 is a schematic view of the shape of the outer choke ring in the present invention.
FIG. 6 is a schematic representation of the flow of medium within a riser reactor during operation of the present invention.
Detailed Description
In order to further describe the technical means and effects adopted by the invention to achieve the preset aim, the following detailed description refers to the specific implementation, structure, characteristics and effects of a riser reactor nozzle which is convenient to overhaul and disassemble and is provided by the invention with reference to the accompanying drawings and the preferred embodiment.
Referring to fig. 2 to 5, the riser reactor nozzle of the present invention comprises a nozzle body 1, a nozzle sleeve 2, a positioning ring 5, an inner gas-blocking ring 6, an outer gas-blocking ring 7, and a tapered liner retainer ring 4, wherein the nozzle sleeve 2 is fixed on a riser reactor housing 8, and the nozzle body 1 and the nozzle sleeve 2 are inserted. Preferably, the nozzle main body 1 is connected with the sleeve flange of the nozzle sleeve 2 through the nozzle flange of the nozzle main body, so that the nozzle main body and the sleeve flange are detachably and fixedly connected. The nozzle body 1 is a catalytic cracking nozzle in the petrochemical field, and has a conventional structure such as a raw material inlet, a steam nozzle, a mixing chamber, etc., and the atomization principle thereof is not described herein.
The positioning ring 5 is in a circular ring shape, is welded and fixed on the inner wall of the nozzle sleeve 2, and keeps a gap of 1mm with the nozzle body 1, and the outer diameter of the positioning ring 5 is the same as the inner diameter of the nozzle sleeve 2. The positioning ring has the functions of positioning and guiding on one hand and is used for ensuring the installation angle and centripetal force of the nozzle main body 1; on the other hand, it acts as a retainer ring, preventing the flexible filler 3 in the upper part from entering the lower cavity between the nozzle body 1 and the nozzle sleeve 2.
The inner gas-blocking ring 6 is in an open circular ring shape, and the end surfaces at the two ends of the opening are respectively provided with a first mounting hole 61, and the opening of the inner gas-blocking ring 6 is closed and elastic inwards in a free state, i.e. has radial shrinkage force or shrinkage trend. When the nozzle is normally installed and used, the internal gas-blocking ring 6 is clamped on the outer wall of the nozzle main body 1 by means of elastic closing force, a gap of 2mm is reserved between the internal gas-blocking ring and the inner wall of the nozzle sleeve 2, and the opening gap of the installed internal gas-blocking ring 6 is controlled to be 1.5-2 mm according to the outer diameter of the nozzle main body 1. The internal gas-blocking ring 6 plays a role of a check ring and preventing oil gas from penetrating along a straight line, and a small amount of passing oil gas can only bypass from an external diameter gap thereof. When the nozzle is installed, after the flexible filling material 3 between the positioning rings 5 is uniformly compacted and plugged, the two first mounting holes 61 are inserted into the two first mounting holes 61 by using clamp spring pliers to open the internal gas-blocking ring, the internal diameter is enlarged and sleeved on the external diameter of the nozzle body, and the nozzle body is pushed in and compressed; when the internal-resistance gas ring 6 is taken out, the opening is pried or opened by using the clamp spring pliers, so that the internal diameter of the internal-resistance gas ring 6 is enlarged.
The outer gas-blocking ring 7 is in an open circular ring shape, and the end surfaces at the two ends of the opening are respectively provided with a second mounting hole 71, and the opening of the outer gas-blocking ring 7 is open and elastic outwards in a free state, i.e. has radial expansion force or expansion trend. The outer choke ring 7 is tightly clamped on the inner wall of the nozzle sleeve 2 by virtue of elastic expansion force during installation, and a gap of 2mm is formed between the inner diameter of the outer choke ring 7 and the outer wall of the nozzle main body 1; after installation, the opening gap of the outer choke ring 7 is controlled to be 2 to 2.5mm according to the difference of the inner diameter of the nozzle sleeve 2. Preferably, after the internal gas-blocking ring 6 and the external gas-blocking ring 7 are arranged in parallel, the opening direction of the external gas-blocking ring 7 and the opening direction of the internal gas-blocking ring 6 are staggered by 180 degrees in the diameter direction, that is to say, the openings of the two are oppositely arranged in the radial direction, and the included angle is 180 degrees. The purpose of the arrangement is that even if a very small amount of oil gas permeates from the gap of the outer gas-barrier ring, the flexible filler needs to permeate into the inner gas-barrier ring through the middle of the inner gas-barrier ring and the outer gas-barrier ring, the very far distance needs to be travelled, and the oil gas permeation is delayed or prevented to the greatest extent. The outer gas-blocking ring 7 plays a role of a movable check ring and a role of preventing oil gas from penetrating along a straight line, and a small amount of passing oil gas and oil-gas-containing catalyst can only bypass from the inner diameter gap. When the nozzle is installed, only the flexible filling material between the nozzle and the internal gas-blocking ring is uniformly compacted and plugged, then the flexible filling material is inserted into the second installation hole 71 by using a clamp spring clamp, the external diameter of the external gas-blocking ring is reduced, and then the flexible filling material is sleeved on the internal diameter of the nozzle sleeve 2, and the nozzle sleeve is pushed in and tightly pressed; when the outer choke ring is taken out, the opening of the outer choke ring is pried by using the clamp spring pliers through the second mounting hole 71, and the opening is contracted to be taken out.
Further, the inner gas-blocking ring 6 and the outer gas-blocking ring 7 have high temperature resistance and elasticity, and when working at high temperature, the opening gap (1.5 to 2 mm) of the inner gas-blocking ring and the opening gap (2 to 2.5 mm) of the outer gas-blocking ring are closed by thermal expansion. Preferably, the working temperature of the internal gas-resistant ring and the external gas-resistant ring is about 350 ℃, and the internal gas-resistant ring and the external gas-resistant ring are respectively made of S30508 stainless steel subjected to quenching (rigidity improvement) heat treatment, have certain rigidity and can resist the temperature of 550 ℃.
The flexible filler 3 is filled in the space surrounded by the positioning ring 5, the internal gas-blocking ring 6, the external gas-blocking ring 7, the nozzle sleeve 2 and the nozzle main body 1, and the flexible filler 3 is ceramic fiber and has the function of adsorbing oil gas and oil gas-containing catalysts. Specifically, the ceramic fiber is white cotton-shaped, resists high temperature of 900 ℃, can penetrate a small amount of oil gas after being compressed, but catalyst particles cannot enter; when overhauling, the overhauling can be carried out by taking out the overhauling by using a hook.
The first wear-resistant lining 9 is filled in the space surrounded by the outer part of the outer gas-resistant ring 7, the end part of the nozzle sleeve 2 and the outlet end of the nozzle main body 1, and is polished smoothly and flatly, so that the flexible filling material 3 is prevented from being directly contacted with oil gas and catalyst and is prevented from being blown out by air flow, the functions of resisting catalyst and wearing and sealing are achieved, the infiltration amount of the oil gas and the catalyst containing oil gas is reduced, and meanwhile, the flat and smooth surface can play the roles of reducing vortex and coking at the nozzle. Second, the surface finish of the first wear-resistant lining 9 is high, and the first wear-resistant lining is not pulled out during maintenance of the nozzle body 1.
A second wear-resistant lining 10 is provided on the outer wall of the nozzle sleeve 2 to protect the nozzle sleeve, the second wear-resistant lining 10 being limited by the conical lining collar 4, the conical lining collar 4 being welded to the end of the nozzle sleeve 2. Specifically, the liner collar mounted in a substantially horizontal state outside the nozzle sleeve 2 has been of a circular ring shape. The invention changes the structural form of the retainer ring of the nozzle sleeve liner, is designed into a cone shape from the original plane circular ring shape, and the installation direction is the same as the medium flow direction 11, namely the conical surface direction of the cone-shaped liner retainer ring 4 is the same as the medium flow direction. The conical lining retainer ring 4 is welded and fixed with the end part of the nozzle sleeve 2, and the port is polished smoothly after welding and certain smoothness is ensured. By adopting the structural design, the cross sectional area in the internal medium flow direction of the riser reactor is reduced by 15-40% according to different nozzle sizes, so that the flow resistance of the reaction medium flow 11 at the nozzle opening is relatively reduced; on one hand, the flow resistance of the nozzle main body and the nozzle sleeve is reduced, and on the other hand, the surface area of the end face coking part is reduced, the smoothness is increased, the generation of vortex 12 is reduced, and the coking condition is properly reduced. Specifically, the medium flow 11 is formed by a high-speed steam pushing catalyst, and the flow rate is generally controlled to be 10m/s.
In combination with fig. 6, the aerodynamic principle is used in normal operation of the invention, on one hand, by arranging the conical lining retainer ring 4 which is the same with the medium flow direction, the cross section area of the whole nozzle in the medium flow direction is reduced, the flow resistance at the end part of the nozzle sleeve 2 is reduced, and the flow resistance of the medium flow at the end part of the nozzle sleeve is relatively reduced. On the other hand, by filling the first wear-resistant lining 9, the surface area at the end face coking is reduced and the smoothness is increased to reduce the generation of vortex 12, thereby suitably reducing the coking condition. Further, by using an S-shaped channel formed by a positioning ring 5, an inner gas-blocking ring 6 and an outer gas-blocking ring 7 in the gap between the nozzle sleeve 2 and the nozzle body 1, a small amount of infiltrated oil gas is infiltrated more slowly along the S-shaped route, and then by using the compacted flexible filler 3 in the S-shaped channel, the infiltration of the oil gas or oil-containing catalyst into the lower gap between the nozzle body 1 and the nozzle sleeve 2 can be prevented. When the nozzle is disassembled, only a small amount of coking exists at the end part of the nozzle body 1, and only a small amount of oil gas or oil-gas-containing catalyst is permeated between the flexible filling materials 3, so that large adhesion force cannot be generated, and the nozzle body 1 can be inspected by only disassembling the connecting bolts at the flanges of the nozzle body 1 and the nozzle sleeve 2 and pulling out the nozzle body 1, thereby achieving the purposes of quick and nondestructive disassembly, inspection and installation of the nozzle body 1. Before the nozzle main body 1 is restored, the first wear-resistant lining 9, the inner and outer gas-resistant rings and the flexible filler 3 are removed, after the nozzle main body 1 is installed and fastened on the nozzle sleeve, the new flexible filler 3 is reinstalled, the inner and outer gas-resistant rings are restored, and finally the first wear-resistant lining 9 is installed.
The above description is only of the preferred embodiments of the present invention, and any simple modification, equivalent variation and modification of the above embodiments according to the technical principles of the present invention will still fall within the scope of the technical solutions of the present invention.
Claims (10)
1. The riser reactor nozzle is characterized by comprising a nozzle main body, a nozzle sleeve, a positioning ring, an internal gas-blocking ring, an external gas-blocking ring and a conical lining retainer ring, wherein the nozzle sleeve is fixed on a shell of the riser reactor, and the nozzle main body and the nozzle sleeve are inserted;
the positioning ring is welded and fixed on the inner wall of the nozzle sleeve, and a gap is formed between the positioning ring and the nozzle main body;
the internal gas-blocking ring is in an open circular shape, first mounting holes are formed in two ends of the opening, the opening of the internal gas-blocking ring is closed and elastic inwards in a free state, and the internal gas-blocking ring is clamped on the outer wall of the nozzle main body and has a gap with the inner wall of the nozzle sleeve when being mounted;
the outer gas-blocking ring is in an open circular ring shape, second mounting holes are formed in two ends of the opening, the opening of the outer gas-blocking ring is open and elastic outwards in a free state, and the outer gas-blocking ring is clamped on the inner wall of the nozzle sleeve and has a gap with the outer wall of the nozzle main body during mounting;
the positioning ring, the internal resistance gas ring and the external resistance gas ring are all arranged in parallel, and the internal resistance gas ring is positioned between the positioning ring and the external resistance gas ring; the flexible filling material is filled in the space surrounded by the positioning ring, the internal gas-blocking ring, the external gas-blocking ring, the nozzle sleeve and the nozzle main body, the first wear-resistant lining is filled in the space surrounded by the external gas-blocking ring, the end part of the nozzle sleeve and the outlet end of the nozzle main body, the outer wall of the nozzle sleeve is provided with the second wear-resistant lining, the second wear-resistant lining is limited by the conical lining retainer ring, and the conical lining retainer ring is welded at the end part of the nozzle sleeve.
2. The riser reactor nozzle for easy access disassembly as set forth in claim 1, wherein: the nozzle main body is connected with the sleeve flange of the nozzle sleeve through the nozzle flange so as to realize the detachable and fixedly connection of the nozzle main body and the sleeve flange of the nozzle sleeve.
3. The riser reactor nozzle for easy access disassembly as set forth in claim 1, wherein: the clearance between the locating ring and the nozzle main body is 1mm.
4. The riser reactor nozzle for easy access disassembly as set forth in claim 1, wherein: the clearance between the external diameter of the internal resistance gas ring and the inner wall of the nozzle sleeve is 2mm.
5. The riser reactor nozzle for easy access disassembly as set forth in claim 1, wherein: the clearance between the internal diameter of outer gas-barrier ring and nozzle main part outer wall is 2mm.
6. The riser reactor nozzle for easy access disassembly as set forth in claim 1, wherein: the conical liner retainer ring is a conical body, and the direction of the conical surface of the conical liner retainer ring after installation is the same as the flow direction of the medium.
7. The riser reactor nozzle for easy access disassembly as set forth in claim 1, wherein: the opening clearance of the internal gas-blocking ring after installation is 1.5mm to 2mm.
8. The riser reactor nozzle for easy access disassembly as set forth in claim 1, wherein: the opening clearance of the outer gas-barrier ring after installation is 2mm to 2.5mm.
9. The riser reactor nozzle for easy access disassembly as set forth in claim 1, wherein: the flexible filler is ceramic fiber.
10. The riser reactor nozzle for easy access disassembly as set forth in claim 1, wherein: the openings of the inner and outer gas-blocking rings are staggered 180 degrees after the inner and outer gas-blocking rings are installed.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910434801.1A CN110038487B (en) | 2019-05-23 | 2019-05-23 | Riser reactor nozzle convenient to overhaul and disassemble and assemble |
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| CN201910434801.1A CN110038487B (en) | 2019-05-23 | 2019-05-23 | Riser reactor nozzle convenient to overhaul and disassemble and assemble |
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| CN110038487A CN110038487A (en) | 2019-07-23 |
| CN110038487B true CN110038487B (en) | 2024-04-12 |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN111457078B (en) * | 2020-04-03 | 2022-11-18 | 中国航发哈尔滨东安发动机有限公司 | Oil pipe combined nozzle |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CA1233425A (en) * | 1983-02-04 | 1988-03-01 | Donald O. Chessmore | Fluid catalytic cracking systems |
| CN202148288U (en) * | 2011-07-27 | 2012-02-22 | 中国石油化工股份有限公司 | Catalytic cracking atomization feeding nozzle |
| CN202415461U (en) * | 2011-12-21 | 2012-09-05 | 洛阳瑞昌石油化工设备有限公司 | Critical flow velocity nozzle with novel structure |
| CN206464099U (en) * | 2017-02-07 | 2017-09-05 | 洛阳瑞昌石油化工设备有限公司 | A kind of critical velocity nozzle |
| CN210009938U (en) * | 2019-05-23 | 2020-02-04 | 洛阳智邦石化设备有限公司 | Riser reactor nozzle convenient to overhaul and disassemble |
-
2019
- 2019-05-23 CN CN201910434801.1A patent/CN110038487B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CA1233425A (en) * | 1983-02-04 | 1988-03-01 | Donald O. Chessmore | Fluid catalytic cracking systems |
| CN202148288U (en) * | 2011-07-27 | 2012-02-22 | 中国石油化工股份有限公司 | Catalytic cracking atomization feeding nozzle |
| CN202415461U (en) * | 2011-12-21 | 2012-09-05 | 洛阳瑞昌石油化工设备有限公司 | Critical flow velocity nozzle with novel structure |
| CN206464099U (en) * | 2017-02-07 | 2017-09-05 | 洛阳瑞昌石油化工设备有限公司 | A kind of critical velocity nozzle |
| CN210009938U (en) * | 2019-05-23 | 2020-02-04 | 洛阳智邦石化设备有限公司 | Riser reactor nozzle convenient to overhaul and disassemble |
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| CN110038487A (en) | 2019-07-23 |
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