CN202415461U - Critical flow velocity nozzle with novel structure - Google Patents
Critical flow velocity nozzle with novel structure Download PDFInfo
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- CN202415461U CN202415461U CN2011205395038U CN201120539503U CN202415461U CN 202415461 U CN202415461 U CN 202415461U CN 2011205395038 U CN2011205395038 U CN 2011205395038U CN 201120539503 U CN201120539503 U CN 201120539503U CN 202415461 U CN202415461 U CN 202415461U
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- nozzle
- wear resistance
- resistance lining
- composite ceramics
- composite ceramic
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Abstract
The utility model belongs to a catalytic cracking unit in the petrochemical engineering industry and mainly relates to a critical flow velocity nozzle with a novel structure. A composite ceramic nozzle (5) is arranged in an austenitic stainless steel outer casing pipe (1); a heat-resisting adhesive (4) is cast or filled in a gap between the composite ceramic nozzle (5) and the outer casing pipe (1); wear-resistant linings (3) are respectively arranged at two ends of the composite ceramic nozzle (5) and are combined with the inner wall of the outer casing pipe (1); and the composite ceramic nozzle (5) is combined with the wear-resisting linings (3) in an embedding way. The heat-resisting adhesive is cast or filled in the gap between the composite ceramic nozzle and the outer casing pipe and the composite ceramic nozzle is combined with the wear-resisting linings in an embedding way, and thus the phenomenon that the outer casing pipe is broken down due to the fact that flue gas penetrates through the combined part between the high-wear resistant linings and the composite ceramic nozzle can be effectively avoided. The critical flow velocity nozzle has the advantages of low cost and convenience in processing and manufacturing.
Description
Technical field
The utility model belongs to the petrochemical complex CCU, relates generally to a kind of critical velocity nozzle of novel texture.
Background technology
In petroleum chemical industry, can produce a large amount of high-temperature flue gas that certain pressure is arranged in the heavy oil catalytically cracking equipment course of processing, pressure reaches about 0.2MPa, temperature about 650 ℃, flue gas flow from several ten thousand steres/hour to the hundreds of thousands of cubic meter/hour.In order to reclaim this part energy, generally be earlier flue gas to be imported the flue gas turbine expander acting of expanding, generation power is used to drive other equipment or power unit.But in flue gas, contain the very high catalyst fines of a certain amount of hardness.These catalyst powder foot couple flue gas turbine expander working-blades have very strong erosion, can cause the damage of flue gas turbine expander very soon.
For fear of the damage of flue gas turbine expander, must a three-stage cyclone separator be set at flue gas turbine expander inlet, the catalyst dust in the flue gas is separated, the concentration of catalyst dust in the flue gas is lowered to greatest extent.But during three-stage cyclone separator work.One stream that loses heart down must be arranged in its bottom, in time take the catalyst dust of separating out of three-stage cyclone separator.This down disappointing rate test definitely after deliberation, following disappointing rate is 3% of exhaust gas volumn～5% o'clock, the separation efficiency of three-stage cyclone separator is the highest.And the control of disappointing rate is accomplished through a critical velocity nozzle under the three-stage cyclone separator.Critical velocity nozzle is the scaling type nozzle, and its throat's flue gas flow rate can reach local velocity of sound, like this flue gas washing away and wear and tear very seriously position before and after critical velocity nozzle throat and the throat.Therefore how to guarantee critical velocity nozzle wear resistance and abrasion resistance, improve its safety and become the focus that this product is paid close attention to.
Existing critical velocity nozzle mainly contains two kinds: a kind of is that the position is made up of the casting cobalt base hard alloy before and after throat and the throat; A kind of in addition is that the position is made up of pottery or lining before and after throat and the throat.Comprehensive above two kinds of schemes, preceding a kind of scheme cost is higher, and the existing structure of a kind of scheme in back is all unreasonable; As being difficult to sealing between pottery and outer tube; Cause in use often to run into the breakdown phenomenon of critical velocity nozzle outer tube, cause flue gas and catalyzer to leak in a large number, thereby influence three grades of separating effects with tetra-cyclone; The content of catalyzer in the flue gas is increased, and then influence the safety and steady operation and the work-ing life of flue gas turbine expander.
Summary of the invention
For solving the problems of the technologies described above, the purpose of the utility model is the critical velocity nozzle that proposes a kind of novel texture, the work-ing life of improving critical velocity nozzle.
The utility model is accomplished the technical scheme that its invention task taked: a kind of critical velocity nozzle of novel texture, have the outer tube of processing by austenitic stainless steel, and sleeve pipe is built-in outside goes into the composite ceramics nozzle; Described nozzle is the structure in flaring footpath, convergent footpath back, and in convergent footpath section and gradually have isodiametric throat between the extension diameter section; Heat-Resisting Adhesive is poured into a mould or is filled with in space between described composite ceramics nozzle and the outer tube; In described composite ceramics nozzle ends wear resistance lining is set; Described wear resistance lining combines with the inwall of outer tube; The bonding surface of described composite ceramics nozzle and wear resistance lining has boss and groove, constitutes the composite ceramics nozzle and combines with the embedded of wear resistance lining.
Have anchor nails in the described wear resistance lining, an end of anchor nails is welded on the inwall of outer tube.
Said anchor nails can be hexsteel, the ring-like anchor nails of layback, Y type anchor nails etc.
The outer side of described wear resistance lining is an arc, is arc-shaped transition between the outer side of wear resistance lining 3 and the lower surface.
Bonding surface at composite ceramics nozzle and wear resistance lining is provided with a back-up ring, plays positioning action.
The utility model adopts technique scheme to have following beneficial effect:
1, work reliability is high.Owing to adopted the composite ceramics nozzle, to compare with lining and other potteries, cobalt base alloy, its wear resistance all is significantly improved; Space between composite ceramics nozzle and outer tube; Cast or filling Heat-Resisting Adhesive; The narrow positions in the inside of critical velocity nozzle is an aditus laryngis; Wear resistance lining before and after the aditus laryngis is Embedded the combination with the employing of composite ceramics nozzle, can effectively avoid flue gas to pass the combining site and then the puncture outer tube of high abrasion lining and composite ceramics nozzle.
2, with low cost, convenient processing and manufacture.
Description of drawings
Fig. 1 is the structural representation of the utility model.
Among the figure: 1, outer tube, 2, anchor nails, 3, wear resistance lining, 4, Heat-Resisting Adhesive, 5, the composite ceramics nozzle, 6, back-up ring.
Embodiment
The embodiment that provides in conjunction with accompanying drawing explains the utility model:
As shown in Figure 1, a kind of critical velocity nozzle of novel texture, the outer tube 1,0 with austenitic stainless steel has composite ceramics nozzle 5 in the outer tube 1 of austenitic stainless steel; Described composite ceramics nozzle 5 is the structure in flaring footpath, convergent footpath back, and in convergent footpath section and gradually have isodiametric throat between the extension diameter section; Space between described composite ceramics nozzle 5 and the outer tube 1 is poured into a mould or is filled with Heat-Resisting Adhesive 4, and its effect is with the clearance seal between composite ceramics nozzle 5 and the outer tube 1, washes away, weares and teares to prevent to cause after flue gas from getting into.Said Heat-Resisting Adhesive is the filled inorganic adhesive, has back-fire relief, high temperature resistant, anti-persistent character, and it can be soluble silicate glue, phosphoric acid salt glue, cupric oxide phosphoric acid glue etc.At described composite ceramics nozzle 5 two ends wear resistance lining 3 is set, described wear resistance lining 3 combines with the inwall of outer tube 1, has anchor nails 2 in the described wear resistance lining, and an end of anchor nails 2 is welded on the inwall of outer tube 1; Said anchor nails 2 can be hexsteel, the ring-like anchor nails of layback, Y type anchor nails etc.The outer side of wear resistance lining 3 is an arc, and the lower surface of wear resistance lining 3 is the plane, is arc-shaped transition between the outer side of wear resistance lining 3 and the lower surface.Described composite ceramics nozzle 5 has boss and groove with the bonding surface of wear resistance lining 3, constitutes composite ceramics nozzle 5 and combines with the embedded of wear resistance lining 3.Bonding surface at composite ceramics nozzle and wear resistance lining is provided with a back-up ring 6, and composite ceramics nozzle 5 is through back-up ring 6 location.
Claims (5)
1. the critical velocity nozzle of a novel texture has the outer tube of being processed by austenitic stainless steel (1), inserts composite ceramics nozzle (5) in the sleeve pipe (1) outside; Described composite ceramics nozzle (5) is the structure in flaring footpath, convergent footpath back, and in convergent footpath section and gradually have isodiametric throat between the extension diameter section; It is characterized in that: Heat-Resisting Adhesive (4) is poured into a mould or is filled with in the space between described composite ceramics nozzle (5) and the outer tube (1); At described composite ceramics nozzle (5) two ends wear resistance lining (3) is set; Described wear resistance lining (3) combines with the inwall of outer tube (1); Described composite ceramics nozzle (5) has boss and groove with the bonding surface of wear resistance lining (3), constitutes the composite ceramic material nozzle and combines with the embedded of wear resistance lining.
2. according to the critical velocity nozzle of the described a kind of novel texture of claim 1, it is characterized in that: have anchor nails (2) in the described wear resistance lining (3), an end of anchor nails (2) is welded on the inwall of outer tube (1).
3. according to the critical velocity nozzle of the described a kind of novel texture of claim 1, it is characterized in that: said anchor nails (2) can be hexsteel, the ring-like anchor nails of layback, Y type anchor nails.
4. according to the critical velocity nozzle of the described a kind of novel texture of claim 1, it is characterized in that: the bonding surface at composite ceramics nozzle (5) and wear resistance lining (3) is provided with a back-up ring that plays the role of positioning (6).
5. according to the critical velocity nozzle of the described a kind of novel texture of claim 1, it is characterized in that: the outer side of said wear resistance lining (3) is an arc, is arc-shaped transition between the outer side of wear resistance lining (3) and the lower surface.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011205395038U CN202415461U (en) | 2011-12-21 | 2011-12-21 | Critical flow velocity nozzle with novel structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011205395038U CN202415461U (en) | 2011-12-21 | 2011-12-21 | Critical flow velocity nozzle with novel structure |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202415461U true CN202415461U (en) | 2012-09-05 |
Family
ID=46740242
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011205395038U Expired - Lifetime CN202415461U (en) | 2011-12-21 | 2011-12-21 | Critical flow velocity nozzle with novel structure |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202415461U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109538368A (en) * | 2018-12-14 | 2019-03-29 | 力帆实业(集团)股份有限公司 | Engine cylinder head of the air intake duct with retaining ring |
| CN110038487A (en) * | 2019-05-23 | 2019-07-23 | 洛阳智邦石化设备有限公司 | A kind of riser reactor nozzle of easy access dismounting |
-
2011
- 2011-12-21 CN CN2011205395038U patent/CN202415461U/en not_active Expired - Lifetime
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109538368A (en) * | 2018-12-14 | 2019-03-29 | 力帆实业(集团)股份有限公司 | Engine cylinder head of the air intake duct with retaining ring |
| CN110038487A (en) * | 2019-05-23 | 2019-07-23 | 洛阳智邦石化设备有限公司 | A kind of riser reactor nozzle of easy access dismounting |
| CN110038487B (en) * | 2019-05-23 | 2024-04-12 | 洛阳智邦石化设备有限公司 | Riser reactor nozzle convenient to overhaul and disassemble and assemble |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CP01 | Change in the name or title of a patent holder |
Address after: 471003 No. 8, Yan Guang road, high and new technology development zone, Luoyang, Henan Patentee after: Luoyang Ruichang Environmental Engineering Co., Ltd. Address before: 471003 No. 8, Yan Guang road, high and new technology development zone, Luoyang, Henan Patentee before: Luoyang Ruichang Petrochemical Equipment Co., Ltd. |
|
| CP01 | Change in the name or title of a patent holder | ||
| CX01 | Expiry of patent term |
Granted publication date: 20120905 |
|
| CX01 | Expiry of patent term |