CN2272975Y - Combined high-temp cyclone separator - Google Patents
Combined high-temp cyclone separator Download PDFInfo
- Publication number
- CN2272975Y CN2272975Y CN 96245851 CN96245851U CN2272975Y CN 2272975 Y CN2272975 Y CN 2272975Y CN 96245851 CN96245851 CN 96245851 CN 96245851 U CN96245851 U CN 96245851U CN 2272975 Y CN2272975 Y CN 2272975Y
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- separation chamber
- vortex
- cyclone separation
- separator
- combined high
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Abstract
The utility model relates to a combined high-temperature cyclone separator, particularly a built-in separator for a circulating fluidized bed boiler, which is characterized in that the utility model is composed of at least one set of a first cyclone separation chamber 1 and a second cyclone separation chamber 2 which is connected in series with the first cyclone separation chamber 1, a flue gas inlet 3 is arranged on the first cyclone separation chamber 1, and the side wall and the bottom of the first cyclone separation chamber are provided with material returning openings 5, 6; a flue gas outlet 4 is arranged on the second cyclone separation chamber 2, the bottom of the second cyclone separation chamber 2 is provided with a material returning opening 6, a baffle plate 9 is arranged between the first cyclone separation chambers 1 and the second cyclone separation chamber 2, and a central passage opening 7 and a central passage necking section 8 are arranged on the middle part of the baffle plate 9. The utility model provides a separator which is suitable for macro-scale operation technology and has the advantages of little resistance, high separation efficiency to the given gas-solid concentration, little space occupation, simple structure, low cost and wide application value.
Description
The utility model belongs to the Combustion technology of circulating fluidized field, the built-in combined high-temperature vortex separator that especially a kind of CFBB uses.
CFBC is that a kind of fuel tolerance is wide, clean burning and load regulation range is big, efficiency of combustion is high, lime-ash is convenient to fully utilize advanced combustion technology.Recirculating fluidized bed combustion system is made of combustion chamber, gas-solid separator and feeding back device, thereby has realized solid-fuelled circulating combustion.Wherein gas-solid separator is the critical component of CFBB, its type decided the entire arrangement form and the structural compactness of boiler, its performance is to the aerodynamic characteristics of boiler combustion system, heat-transfer character, efficiency of combustion, the utilization of cycle efficieny and desulfurization characteristic, lime stone all has material impact.The CFBB that the eighties is developed mostly adopts external cyclone water-separator, it is bulky, resistance is high, make the boiler increase that takes up room, and general whirlwind tube not only needs very thick thermal insulation layer and very thick flame retardant coating, and its amount of stored heat is increased, thus prolonged the start-up time of boiler, influence the Load Regulation characteristic of boiler, the while complex structure, the cost height.The built-in separator of China's disclosed boiler of 89103129.4 patents of invention, be horizontal medial rotation tube, its primary structure is made up of with a separation chamber of connecting the separation chamber of two parallel connections, its ash-laden gas is tangentially concentrated from the inlet that is positioned at horizontal tube one side and is entered, flue gas after the separation is drawn from axially concentrating, and its problem is: (1) flue gas is introduced from a side of separator, causes in the combustion chamber flue gas degree of filling bad, have local dead band, the bags is utilized bad; (2) flue gas is drawn from axially concentrating, and makes the convection heating surface that is positioned at behind the separator outlet be difficult for arranging, easily cause the inhomogeneous of sweep of gases, and cause the wearing and tearing and the thermal deviation of convection heating surface, thereby the safety that influences boiler is carried out.Flue gas is axially drawn, air-flow is too concentrated, and Velocity Profiles is inhomogeneous, therefore be unfavorable for Scale-up of Circulating Fluidized Bed Boiler.Flue gas enters from being positioned at one of separator one end tangential the concentrating of inlet in addition, draws from axially concentrating through separating after, cause when the smoke treatment amount is big, for guarantee to enter the mouth tangential velocity and axial velocity, the diameter of separator must increase.This not only makes the increase of separator volume too big and take up room and make top, combustion chamber be difficult to place, and separative efficiency reduces after the separator diameter increases, do not satisfy the requirement of circulating ratio, thereby only can be applicable to and should not maximize the CFBB of low capacity.
The purpose of this utility model provides and a kind ofly is suitable for maximization, resistance little, for given gas-solid concentration efficiency separator height, take up room little, cost is low is used for built-in combined high-temperature vortex separator on the CFBB.
The purpose of this utility model is achieved through the following technical solutions: combined high-temperature vortex separator, it is characterized in that: the second vortex separation chamber (2) by at least one group first vortex separation chamber (1) and series connection with it forms, has smoke inlet (3) in the first vortex separation chamber (1), sidewall is provided with feedback outlet (5), the bottom is provided with feedback outlet (6), has exhanst gas outlet (4) in the second vortex separation chamber (2), the bottom is provided with feedback outlet (6), be provided with dividing plate (9) between the first vortex separation chamber (1) and the second vortex separation chamber (2), dividing plate (9) middle part is provided with central passage mouth (7) and central passage reducing section (8).
The utlity model has following advantage: the air-flow after the outlet of (1) the utility model is even, and is very favourable to follow-up heating surface layout, is convenient to maximize.(2) utilize the combined type arrangement, determine the group number of combination trap according to boiler load smoke treatment amount, design is convenient.(3) multiple entry, from outlet, avoided conventional separator to increase with the flue gas treating capacity that its diameter increases and the low disadvantage of separative efficiency has high separative efficiency, can reach 85-95% for given gas-solid concentration separative efficiency.(4) separator arrangement of the present utility model is on circulating fluidized bed combustor top, thereby make between the combustion chamber of adopting external separator CFBB and the separator and the pipeline and the expansion pipe cancel all of the expensive high-temperature refractory that is lined with between separator and the afterbody convection heating surface, therefore make that the piece-rate system structure is more simple and reliable, material consumption is few, cost is low, only is 10% of external vertical cyclone separator.(5) resistance is little, 250-400Pa.(6) be arranged in circulating fluidized bed combustor top, the multi-functional that have separation simultaneously, burn, burns.The utility model efficiency separator height, resistance be little, be easy to maximize, and have take up room little, characteristics such as cost is low, thereby can on CFBB, be applicable.Also applicable to common bubble bed boiler and grate furnace, coal-powder boiler, oil burning boiler etc. are adapted as the improvement and design of CFBB, have engineering application and high engineering using value widely.
Below in conjunction with accompanying drawing this reality novel concrete structure and embodiment are described in detail.
Fig. 1 is the structural representation of this real new embodiment 1;
Fig. 2 is the A-A cutaway view of Fig. 1;
Fig. 3 is the structural representation of embodiment 2;
Fig. 4 is the layout drawing of the utility model in the combustion chamber.
The utility model combined high-temperature vortex separator is with reference to the embodiment 1 shown in accompanying drawing 1 and the accompanying drawing 2, is that meal vortex separation chamber (1) and fine powder vortex separation chamber (2) form by the second vortex separation chamber (2) of at least one group first vortex separation chamber (1) and series connection with it.The first vortex separation chamber (1) and the second vortex separation chamber (2) constitute one group, and other is respectively organized and is parallel-connection structure between the separation chamber, the group of separator is several to be determined according to boiler load smoke treatment amount, and each organizes the first vortex separation chamber (1) and the second vortex separation chamber (2) arranges at interval.Have smoke inlet (3) in the first vortex separation chamber (1), sidewall is provided with feedback outlet (5), and the bottom is provided with feedback outlet (6).Have exhanst gas outlet (4) in the second vortex separation chamber (2), the bottom is provided with feedback outlet (6).Be provided with dividing plate (9) between the first vortex separation chamber (1) and the second vortex separation chamber (2), dividing plate (9) middle part is provided with central passage mouth (7) and central passage reducing section (8).
Each the group separation chamber of embodiment 1 shown in the accompanying drawing 1 is the structure that communicates, and is middle by dividing plate (9) and central passage reducing section (8) separation, communicated by central passage mouth (7).
With reference to the embodiment 2 shown in the accompanying drawing 3, the difference of the embodiment 1 shown in itself and the accompanying drawing 1 is: every group of separation chamber be for being provided with separately, middlely separated by closure plate (16), and be not connected.
The layout of the utility model in the combustion chamber be as shown in Figure 4: the high-temperature flue gas that carries solid phase particles that coal is produced in the combustion chambers burn process of CFBB, enter the dilute-phase zone (11) on top from the emulsion zone (10) of bottom, combustion chamber, with the tangential parallel inlet (3) that enters the first vortex separation chamber (1) of the combined high-temperature vortex separator (12) that is arranged in dilute-phase zone exit, fluid bed top of certain speed, and the high speed rotation forms vortex motion in the first vortex separation chamber (1), solid particle in the gas-solid multiphase flow that is made of fly ash granule and flue gas rotates under the centrifugal action of generation strongly at air-flow, wall to separator concentrates and adherent being captured, and draw by the feedback outlet (5) and the bottom feedback outlet (6) of first vortex chamber (1) sidewall, flue gas stream further enters in second vortex chamber (2) by the central passage mouth (7) between first vortex chamber (1) and second vortex chamber (2), continue rotational flow inside, further solid phase particles contained in the flue gas is realized separating, the particle that separates is drawn from the feedback outlet (6) that is positioned at second vortex chamber (2) bottom.
For embodiment 1, flue gas flows to into the separation chamber (2) that enters both sides after first vortex chamber (1) from passway, the left and right sides (7) respectively, realizes that bilateral separates simultaneously.And for embodiment 2, because every group of separation chamber independently be provided with, do not communicate with the separation chamber of adjacent set, so flue gas enters further separation on the same group second separation chamber (2) after separating in first separation chamber (1).The solid phase particles of separating from first vortex chamber (1) and second vortex chamber (2) returns bottom, combustion chamber emulsion zone (10), thereby realizes circulating combustion, improves efficiency of combustion.Because the high speed rotational flow of high-temperature flue gas in the combined type roto-clone separator, strengthened fuel gas abundant with combustible with oxygen, mix strongly, to fine particle once burn with fuel gas once to burn effect splendid.
Combined high-temperature vortex separator (12) is arranged in burning in circulating fluid bed boiler chamber dilute-phase zone (11) top, i.e. furnace outlet.Also return fluidized-bed combustion boiler combustion chamber emulsion zone (10) by the isolated solid phase particles of separator (12) through feedback outlet (5), (6) and realize circulating combustion by feed back passage (14).Clean flue gas after the separation enters horizontal flue (13) behind the boiler combustion chamber exit from the exhanst gas outlet (4) that is positioned at the second vortex separation chamber (2).
Separator of the present utility model can bend and lay the high-temperature flame-proof high-abrasive material or hang special-shaped fire-resistant, abrasive brick and form with water-cooling wall.Guarantee following structural parameters during design: the air velocity of first vortex separation chamber inlet (3) and second vortex separation chamber outlet (4) is 16-25m/s; The ratio of width to height of inlet (3) outlet (4) is 1-3.5; The center line of outlet (4) and the angle α of horizontal aspect are 20 °-40 °; Reducing segment length and each vortex separation chamber length ratio are 0.1-0.4; The diameter of the perforate (7) on the dividing plate (9) is 0.3-0.7 with the diameter of vortex separation chamber ratio; Material return chamber's swash plate (15) is 20 °-40 ° with the angle β of vertical direction.
Claims (7)
1, combined high-temperature vortex separator is characterized in that; The second vortex separation chamber (2) by at least one group first vortex separation chamber (1) and series connection with it forms, has smoke inlet (3) in the first vortex separation chamber (1), sidewall is provided with feedback outlet (5), the bottom is provided with in feedback outlet (6), the second vortex separation chamber (2) has exhanst gas outlet (4), the bottom is provided with feedback outlet (6), be provided with dividing plate (9) between the first vortex separation chamber (1) and the second vortex separation chamber (2), dividing plate (9) middle part is provided with central passage mouth (7) and central passage reducing section (8).
2, combined high-temperature vortex separator according to claim 1 is characterized in that: the ratio of width to height of the smoke inlet (3) in the first vortex separation chamber (1) is 1-3.5.
3, combined high-temperature vortex separator according to claim 1 is characterized in that: the ratio of width to height of the exhanst gas outlet (4) in the second vortex separation chamber (2) is 1-3.5.
4, combined high-temperature vortex separator according to claim 1 is characterized in that: the center line of the exhanst gas outlet (4) in the second vortex separation chamber (2) and the angle α of horizontal direction are 20 °-40 °.
5, combined high-temperature vortex separator according to claim 1 is characterized in that: the diameter of the central passage mouth (7) on the dividing plate (9) is 0.3-0.7 with the diameter of vortex separation chamber ratio.
6, combined high-temperature vortex separator according to claim 1 is characterized in that: the length of the central passage reducing section (8) on the dividing plate (9) is 0.1-0.4 with the length of place vortex separation chamber ratio.
7, combined high-temperature vortex separator according to claim 1 is characterized in that: be parallel-connection structure between the separation chamber by respectively organizing of the first vortex separation chamber (1) and the second vortex separation chamber (2) formation.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 96245851 CN2272975Y (en) | 1996-11-12 | 1996-11-12 | Combined high-temp cyclone separator |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 96245851 CN2272975Y (en) | 1996-11-12 | 1996-11-12 | Combined high-temp cyclone separator |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2272975Y true CN2272975Y (en) | 1998-01-21 |
Family
ID=33918750
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 96245851 Expired - Lifetime CN2272975Y (en) | 1996-11-12 | 1996-11-12 | Combined high-temp cyclone separator |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2272975Y (en) |
-
1996
- 1996-11-12 CN CN 96245851 patent/CN2272975Y/en not_active Expired - Lifetime
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned | ||
| C20 | Patent right or utility model deemed to be abandoned or is abandoned |