CN208108070U - Using the flue gas recirculation system of hi-temp hi-effective cyclone separator - Google Patents
Using the flue gas recirculation system of hi-temp hi-effective cyclone separator Download PDFInfo
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- CN208108070U CN208108070U CN201820396428.6U CN201820396428U CN208108070U CN 208108070 U CN208108070 U CN 208108070U CN 201820396428 U CN201820396428 U CN 201820396428U CN 208108070 U CN208108070 U CN 208108070U
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Abstract
The utility model discloses a kind of flue gas recirculation systems using hi-temp hi-effective cyclone separator, it is characterized in that, including passing through the sequentially connected boiler of flue gas recirculation pipeline, hi-temp hi-effective cyclone separator, circulating fan, the mixing arrangement with pure oxygen pipeline, the dust-exhausting port of hi-temp hi-effective cyclone separator connects cyclone separator ash-storing bin, and the ash separated from ash-storing bin outlet enters boiler by the blasting action of circulating fan；The outlet end of circulating fan is separately connected mixing arrangement, cyclone separator ash-storing bin, and mixing arrangement is connected to the boiler-burner of boiler, and cyclone separator ash-storing bin is connected to the burner hearth of boiler, boiler back end ductwork respectively.The system is simple, small investment, is transformed conveniently, can effectively be adjusted to boiler in-furnace temperature and Slagging degree, reduce blower abrasion, improve the economy and safety of boiler operatiopn.
Description
Technical field
The utility model relates to a kind of flue gas recirculation systems using hi-temp hi-effective cyclone separator, belong to coal-burning boiler
Oxygen-enriched combusting field.
Background technique
The discharge for reducing greenhouse gases is a big hot spot of the world today.The discharge of carbon dioxide is wherein reduced, especially
Reducing from the carbon dioxide that coal burning generates is the task of top priority.Researchers are to carbon dioxide capture and Plugging Technology Applied thus
A large amount of research is carried out, wherein oxygen-enriched combusting is one of main means and the mode in carbon dioxide capture and Plugging Technology Applied.
Oxygen-enriched combustion technology is an efficient energy-saving combustion technology.Refer in existing station boiler system-based, with height
The O of purity2Instead of combustion air.Rate-of flow and heat-transfer character in burner hearth are adjusted using flue gas recirculation simultaneously, can get height
CO is rich in up to 85%~95% volumetric concentration2Flue gas, thus with lesser cost condensation compression realize CO after purification2Forever
It seals up for safekeeping or resource utilization long.
In oxygen-enriched combusting, the system of most critical is that flue gas recirculation system, and wherein circulating fan is that this is
Key equipment in system.Flue gas is drawn through circulating fan before air preheater and is sent into mixing arrangement and oxygen mix.But
It is directly to be recycled using circulating fan to flue gas in flue gas containing the fly ash granule after a large amount of coal dust firings, it is a large amount of to fly
Ash particle will wear blower, influence the normal operation of blower.A kind of solution is by the low-temperature flue gas extraction after deduster
Recycled, at this moment flue gas needs the heating that exchanges heat again, increase cost, and at low load flue gas recirculation system without
Method work.Dimension, it is necessary to the fly ash granule in flue gas recirculation system before taking measures to remove dedusting.
In the industry, cyclone separator is the generated centrifugal force when making high speed rotation using the non-homogenous system of gaseous state, will
A kind of dry type gas-solid separation equipment that dust is separated from air-flow.The minimum diameter that particle can cost-effectively be separated can
Up to 5 microns.Cyclone separator has relatively simple for structure, operation, easy to maintain, steady performance, and is not contained again
The limitation such as concentration, temperature, physical property of dust and gas body, and cost is lower, has been widely used in petroleum, chemical industry, coal, electric power, ring
In the industrial productions such as guarantor and metallurgy.Dimension can use cyclone separator to separate the fly ash granule in circulating flue gas.
In addition, a problem for comparing concern in boiler combustion is the Slagging problem of heating surface, often through mixing
The substances such as kaolin are burnt to reduce the Slagging of heating surface.In tail flue gas, unreacted kaolinite is contained in fly ash granule
Soil particle also fails to Efficient Cycle utilization.If self-loopa can be carried out to flying dust, silica alumina ratio in regulating stove, will effectively improve by
Hot face prevents the ability of Slagging.
Therefore, it is necessary to which the abrasion for taking effective measure to solve circulating fan in flue gas recirculation system in oxygen-enriched combusting is asked
Topic, while fly ash granule is efficiently used, these also fail to solve now.It needs to be transformed flue gas recirculation system, come
The abrasion for reducing circulating fan, reduces the Slagging of heating surface, improves the economy and safety of boiler.
Utility model content
Problem to be solved in the utility model is：Blower wear problem, provides existing for existing flue gas recirculating technique
A kind of flue gas recirculation system using hi-temp hi-effective cyclone separator, the system is simple, small investment, and transformation is convenient, to boiler
In-furnace temperature is effectively adjusted, and is reduced blower abrasion, is improved the economy and safety of boiler operatiopn.
To solve the above-mentioned problems, technical solution used by the utility model is：
A kind of flue gas recirculation system using hi-temp hi-effective cyclone separator, which is characterized in that including passing through flue gas again
The sequentially connected boiler of circulation line, hi-temp hi-effective cyclone separator, circulating fan, the mixing arrangement with pure oxygen pipeline, high temperature
The dust-exhausting port of efficient cyclone separator connects cyclone separator ash-storing bin, and the ash separated from ash-storing bin outlet passes through circulated air
The blasting action of machine enters boiler；The outlet end of circulating fan is separately connected mixing arrangement, cyclone separator ash-storing bin, mixing dress
It sets and is connected to the boiler-burner of boiler, cyclone separator ash-storing bin is connected to the burner hearth of boiler, boiler back end ductwork respectively；Institute
Stating cyclone separator includes mutually nested outer barrel, inner cylinder, and the bottom of outer barrel is equipped with conic tube, sets on the outside of outer barrel
There is inlet tube, the upper end of inner cylinder is equipped with exhaust pipe, and the outside of exhaust pipe is equipped with secondary separation cylinder.
Preferably, the front side of the boiler back end ductwork is equipped with air preheater, and flue gas recirculation pipeline is from air preheat
The front side of device is drawn, and the flue-gas temperature of extraction is 200~550 DEG C.
Preferably, the flue gas flow rate in the inlet tube of the cyclone separator is 10~30m/s.
Preferably, the outside of the inner cylinder of the cyclone separator is equipped with the baffle ring that section is triangle.
Preferably, the lower end of the inner cylinder of the cyclone separator is throat structure, and inside contracting angle is 15~45 °.
Preferably, the contact surface of the cyclone separator and flue gas is equipped with ceramic wear-resisting material.
Preferably, angle runner is equipped between the exhaust pipe of the cyclone separator and secondary separation cylinder.
Compared with prior art, the utility model has the beneficial effects that：
1. adding a cyclone separator before the circulating fan of flue gas recirculation system, effectively remove in circulating flue gas absolutely
Most of particulate matter reduces abrasion of the particulate matter to circulating fan, improves the safety of system, reduces operation and maintenance cost.
2. reducing the Radiant exothermicity in boiler furnace using flue gas recycled, vapor (steam) temperature is effectively adjusted,
System adjusting is sensitive, corresponding rapid.
3. being divided into two-way using the fly ash granule under cyclone separator separation, a part is re-fed into burner hearth and carries out flying dust certainly
Circulation, the case where adjusting the silica alumina ratio in inner flue gas of the stove using flying dust, the flying dust Slagging of furnace internal heating surface is effectively reduced, separately
Deduster that is a part of then passing through boiler tail, is removed.
4. cyclone separator uses double volute import form, Eddy Distribution in cyclone separator can be made symmetrical, stablize whirlpool
Stream prevents unstable vortex from generating, advantageously reduces the generation of short circuit phenomenon and reduce the air-teturning mixed phenomenon at dust-exhausting port.
5. installing inner cylinder in cyclone separator additional and utilizing great circulation area, the axial speed of ascending air in inner cylinder is reduced
Degree carries out secondary point using the rotating energy in exhaust pipe so that particulate matter is not easy to be carried by air-flow and can realize gravitational settling
From further increasing the separative efficiency of cyclone separator and reduce the pressure loss of cyclone separator.
Detailed description of the invention
Fig. 1 is the schematic diagram of the flue gas recirculation system provided by the utility model using hi-temp hi-effective cyclone separator；
Fig. 2 is the perspective view of cyclone separator.
Specific embodiment
To be clearer and more comprehensible the utility model, hereby with preferred embodiment, and attached drawing is cooperated to be described in detail below.
Embodiment
It as shown in Figure 1, 2, is a kind of flue gas recirculation using hi-temp hi-effective cyclone separator provided by the utility model
System comprising pass through the sequentially connected boiler of flue gas recirculation pipeline 1, hi-temp hi-effective cyclone separator 2, circulating fan 3, band
The dust-exhausting port of the mixing arrangement 4 of pure oxygen pipeline 5, hi-temp hi-effective cyclone separator 2 connects cyclone separator ash-storing bin 6, from storage ash
Storehouse 6 exports the ash separated and enters boiler by the blasting action of circulating fan 3；The outlet end of circulating fan 3 is separately connected
Mixing arrangement 4, cyclone separator ash-storing bin 6, mixing arrangement 4 are connected to the boiler-burner of boiler, cyclone separator ash-storing bin 6
It is connected to respectively with the burner hearth of boiler, boiler back end ductwork.
As shown in Fig. 2, cyclone separator 2 includes mutually nested outer barrel 201, inner cylinder 202, the bottom of outer barrel 201
Portion is equipped with conic tube 203, and the outside of outer barrel 201 is equipped with inlet tube 206, and the upper end of inner cylinder 202 is equipped with exhaust pipe 205, row
The outside of tracheae 205 is equipped with secondary separation cylinder 204.The front side of boiler back end ductwork is equipped with air preheater 7, flue gas recirculation
Pipeline 1 is drawn from the front side of air preheater 7, and the flue-gas temperature of extraction is 350~450 DEG C.Flue gas flow rate in inlet tube 206
For 10~30m/s.After flue gas enters in cyclone separator 2, the annular region spiral between inner cylinder 202 and outer barrel 201
It moves downward.The outside of inner cylinder 202 is equipped with the baffle ring 207 that section is triangle, and air-flow can mention after triangle baffle ring
The tangential velocity of height rotation is conducive to improve separative efficiency.The lower end of inner cylinder 202 be throat structure, inside contract angle be 15~
45 °, it is possible to reduce the short circuit phenomenon of exhaust pipe near ports.In 205 outside of exhaust pipe, welded between secondary separation cylinder 204
Angle runner 208 is connect, the spinning updraft in outside carries particle and separates secondary point of progress from runner in exhaust pipe 205
From.The contact surface of cyclone separator 2 and flue gas is equipped with ceramic wear-resisting material, and reach a high temperature the lower requirement used.
Specifically flue gas recirculation process is：
Flue gas is led to cyclone separator 2 by the flue gas recycled pipeline 1 before being arranged in boiler tail air preheater 7,
Enter in cyclone separator 2 progress fly ash granule separation from two imports of cyclone separator 2, the fly ash granule separated into
Enter cyclone separator ash-storing bin 6, the purifying smoke for being removed particle merges from 205 two outlet discharges of exhaust pipe, passes through circulation
Purifying smoke is introduced mixing arrangement 4 by blower 3, is entered with the pure oxygen separated in air separator by pure oxygen pipeline 5 and is mixed
It attaches together and sets mixing in 4, burner is then sent by pipeline, is traveled further into furnace, achieve the effect that adjust steam temperature.Whirlwind point
The hearth region before furnace internal heating surface is carried along by pulverizer coal feeder air-supply from the ash in device ash-storing bin 6, mixes, utilizes with flue gas
The flying dust Slagging situation of furnace internal heating surface is effectively reduced in silica alumina ratio in fly ash granule regulating stove.
Claims (6)
1. a kind of flue gas recirculation system using hi-temp hi-effective cyclone separator, which is characterized in that including being followed again by flue gas
The sequentially connected boiler in endless tube road (1), hi-temp hi-effective cyclone separator (2), circulating fan (3), the mixing with pure oxygen pipeline (5)
The dust-exhausting port of device (4), hi-temp hi-effective cyclone separator (2) connects cyclone separator ash-storing bin (6)；Circulating fan (3) goes out
Mouth end is separately connected mixing arrangement (4), cyclone separator ash-storing bin (6), the boiler-burner company of mixing arrangement (4) and boiler
Logical, cyclone separator ash-storing bin (6) is connected to the burner hearth of boiler, boiler back end ductwork respectively；The cyclone separator (2) includes
The bottom of mutually nested outer barrel (201), inner cylinder (202), outer barrel (201) is equipped with conic tube (203), outer barrel
(201) outside is equipped with inlet tube (206), and the upper end of inner cylinder (202) is equipped with exhaust pipe (205), the outside of exhaust pipe (205)
Equipped with secondary separation cylinder (204).
2. applying the flue gas recirculation system of hi-temp hi-effective cyclone separator as described in claim 1, which is characterized in that described
The front side of boiler back end ductwork is equipped with air preheater (7), and flue gas recirculation pipeline (1) draws on front side of air preheater (7)
Out.
3. applying the flue gas recirculation system of hi-temp hi-effective cyclone separator as described in claim 1, which is characterized in that described
The outside of the inner cylinder (202) of cyclone separator (2) is equipped with the baffle ring (207) that section is triangle.
4. applying the flue gas recirculation system of hi-temp hi-effective cyclone separator as described in claim 1, which is characterized in that described
The lower end of the inner cylinder (202) of cyclone separator (2) is throat structure, and inside contracting angle is 15~45 °.
5. applying the flue gas recirculation system of hi-temp hi-effective cyclone separator as described in claim 1, which is characterized in that described
The contact surface of cyclone separator (2) and flue gas is equipped with ceramic wear-resisting material.
6. applying the flue gas recirculation system of hi-temp hi-effective cyclone separator as described in claim 1, which is characterized in that described
Angle runner (208) are equipped between the exhaust pipe (205) and secondary separation cylinder (204) of cyclone separator (2).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820396428.6U CN208108070U (en) | 2018-03-22 | 2018-03-22 | Using the flue gas recirculation system of hi-temp hi-effective cyclone separator |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820396428.6U CN208108070U (en) | 2018-03-22 | 2018-03-22 | Using the flue gas recirculation system of hi-temp hi-effective cyclone separator |
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| Publication Number | Publication Date |
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| CN208108070U true CN208108070U (en) | 2018-11-16 |
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| CN201820396428.6U Active CN208108070U (en) | 2018-03-22 | 2018-03-22 | Using the flue gas recirculation system of hi-temp hi-effective cyclone separator |
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| CN (1) | CN208108070U (en) |
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2018
- 2018-03-22 CN CN201820396428.6U patent/CN208108070U/en active Active
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