CN220870852U - Cyclone separator separation efficiency adjustable circulating fluidized bed boiler - Google Patents
Cyclone separator separation efficiency adjustable circulating fluidized bed boiler Download PDFInfo
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- CN220870852U CN220870852U CN202322521836.3U CN202322521836U CN220870852U CN 220870852 U CN220870852 U CN 220870852U CN 202322521836 U CN202322521836 U CN 202322521836U CN 220870852 U CN220870852 U CN 220870852U
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- fluidized bed
- circulating fluidized
- bed boiler
- separation efficiency
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- 238000000926 separation method Methods 0.000 title claims abstract description 40
- 239000000463 material Substances 0.000 claims abstract description 15
- 239000007789 gas Substances 0.000 claims description 6
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 claims description 4
- 239000003546 flue gas Substances 0.000 claims description 4
- 239000003570 air Substances 0.000 claims description 3
- 239000011261 inert gas Substances 0.000 claims description 3
- 230000001590 oxidative effect Effects 0.000 claims description 3
- 239000000446 fuel Substances 0.000 description 25
- 238000002485 combustion reaction Methods 0.000 description 22
- MWUXSHHQAYIFBG-UHFFFAOYSA-N Nitric oxide Chemical compound O=[N] MWUXSHHQAYIFBG-UHFFFAOYSA-N 0.000 description 12
- 239000000779 smoke Substances 0.000 description 10
- 239000003245 coal Substances 0.000 description 8
- 238000005516 engineering process Methods 0.000 description 5
- 238000006243 chemical reaction Methods 0.000 description 4
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 4
- 238000001704 evaporation Methods 0.000 description 3
- 230000008020 evaporation Effects 0.000 description 3
- 239000002028 Biomass Substances 0.000 description 2
- 238000010521 absorption reaction Methods 0.000 description 2
- 229910052799 carbon Inorganic materials 0.000 description 2
- 238000001816 cooling Methods 0.000 description 2
- 239000010802 sludge Substances 0.000 description 2
- 239000007787 solid Substances 0.000 description 2
- 239000002699 waste material Substances 0.000 description 2
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- 238000005299 abrasion Methods 0.000 description 1
- 230000006978 adaptation Effects 0.000 description 1
- 238000004458 analytical method Methods 0.000 description 1
- RHZUVFJBSILHOK-UHFFFAOYSA-N anthracen-1-ylmethanolate Chemical compound C1=CC=C2C=C3C(C[O-])=CC=CC3=CC2=C1 RHZUVFJBSILHOK-UHFFFAOYSA-N 0.000 description 1
- 239000003830 anthracite Substances 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000002802 bituminous coal Substances 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 239000010791 domestic waste Substances 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000003344 environmental pollutant Substances 0.000 description 1
- 239000004744 fabric Substances 0.000 description 1
- 239000010419 fine particle Substances 0.000 description 1
- 238000009413 insulation Methods 0.000 description 1
- 239000003077 lignite Substances 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 239000004058 oil shale Substances 0.000 description 1
- 239000002006 petroleum coke Substances 0.000 description 1
- 238000000053 physical method Methods 0.000 description 1
- 231100000719 pollutant Toxicity 0.000 description 1
- 230000001737 promoting effect Effects 0.000 description 1
- 239000002893 slag Substances 0.000 description 1
- 239000002689 soil Substances 0.000 description 1
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- Fluidized-Bed Combustion And Resonant Combustion (AREA)
Abstract
The utility model belongs to the technical field of boilers, and particularly relates to a circulating fluidized bed boiler with adjustable separation efficiency of a cyclone separator, which comprises a circulating fluidized bed boiler hearth, wherein the upper part of the circulating fluidized bed boiler hearth is connected with a cyclone separator inlet horizontal flue; the cyclone separator comprises a cyclone separator cylinder, the lower part of the cyclone separator cylinder is connected with a cyclone separator cone section, the lower part of the cyclone separator cone section is connected with a cyclone separator vertical pipe, the lower part of the cyclone separator vertical pipe is connected with a material returning device, the material returning device is connected with a circulating fluidized bed boiler furnace through a pipeline, and one end of a cyclone separator inlet horizontal flue, which is far away from the circulating fluidized bed boiler furnace, is connected with the cyclone separator cylinder; the cyclone separator also comprises a turbulent flow device air supply system, wherein the turbulent flow device is connected to the horizontal flue at the inlet of the cyclone separator, and the turbulent flow device air supply system is connected with the turbulent flow device. The utility model provides a circulating fluidized bed boiler with an adjustable separation efficiency of a cyclone separator.
Description
Technical Field
The utility model belongs to the technical field of boilers, and particularly relates to a circulating fluidized bed boiler with an adjustable separation efficiency of a cyclone separator.
Background
The circulating fluidized bed combustion technology is widely applied to the coal-fired generator set due to the advantages of wide coal adaptability, high combustion efficiency, low pollutant emission and the like. The gas-solid separator is an important component of the combustion technology of the circulating fluidized bed, and common forms of the gas-solid separator include cyclone separators, inertial separators (such as groove type and shutter), combined separators and the like.
Cyclone separators are one of the most commonly used types of separators in the technical field of circulating fluidized bed combustion, and are divided into high-temperature separators and medium-temperature separators according to different temperatures and structures, and are in the forms of air cooling, water cooling or heat insulation and the like. The cyclone separator mainly comprises a cylindrical cyclone cylinder, a conical accelerating section, an airflow leading-out section and the like.
Although the cyclone separator technology for the circulating fluidized bed boiler is mature, the efficiency of the separator can reach more than 99.5%, and the high efficiency of the separator has remarkable effects on improving the burnout efficiency of the boiler fine particle fuel, promoting the circulation of materials in the boiler, improving the heat transfer in the boiler and the like. But the role of a high separation efficiency separator is not always positive under certain fuels or certain conditions. For example, certain biomass fuels have high soil content, and high separation efficiency can lead to excessive concentration of circulating materials in the furnace, so that temperature in the furnace is reduced, and combustion efficiency is drastically reduced. For example, in some boilers, low-load denitration is required due to high requirement on nitrogen oxide emission at the time of medium and low load, but the temperature level in the boiler is low due to high separation efficiency, and the temperature of a horizontal flue at the inlet of the separator cannot reach the temperature range of denitration. At present, each boiler plant aims at improving the separation efficiency of the cyclone separator, but the problems are difficult to solve or have high cost on the premise of high separation efficiency of the separator, so that if the separation efficiency of the separator can be adjusted, the problems can be solved. For example, after the boiler changes the high ash coal, the circulating ash amount is greatly increased, so that the material returning device is not fed back, the vibration of the material returning device is caused, and the like.
Different schemes are proposed for adjusting the separation efficiency of the cyclone separator of the circulating fluidized bed boiler in different units. For example, publication number CN110145736a, proposes to add a disturbance device to the cone section of the separator to adjust the separator efficiency; publication number CN111237748a, a method for adjusting the separator efficiency by changing the separator inlet cross-sectional area is proposed: publication number CN208457950U, a device for adding disturbance wind under the inlet flue is proposed to adjust the separator efficiency; publication number CN217653840U, a way to vary the length of the central cylinder is proposed to adjust the separator efficiency.
The above-mentioned patents either use physical methods to change the separator inlet flow rate or the center tube length or use airflow disturbances to change the separator efficiency. Some are difficult to implement in engineering practical application, and some may bring secondary problems such as abrasion.
Disclosure of utility model
In order to solve the problems in the prior art, the utility model aims to provide a circulating fluidized bed boiler with an adjustable separation efficiency of a cyclone separator.
The technical scheme adopted by the utility model is as follows:
The circulating fluidized bed boiler with the adjustable separation efficiency of the cyclone separator comprises a circulating fluidized bed boiler furnace, wherein the upper part of the circulating fluidized bed boiler furnace is connected with a cyclone separator inlet horizontal flue; the cyclone separator comprises a cyclone separator cylinder, the lower part of the cyclone separator cylinder is connected with a cyclone separator cone section, the lower part of the cyclone separator cone section is connected with a cyclone separator vertical pipe, the lower part of the cyclone separator vertical pipe is connected with a material returning device, the material returning device is connected with a circulating fluidized bed boiler furnace through a pipeline, and one end of a cyclone separator inlet horizontal flue, which is far away from the circulating fluidized bed boiler furnace, is connected with the cyclone separator cylinder; the cyclone separator also comprises a turbulent flow device air supply system, wherein the turbulent flow device is connected to the horizontal flue at the inlet of the cyclone separator, and the turbulent flow device air supply system is connected with the turbulent flow device.
On the basis of not changing the overall design of the cyclone separator of the prior circulating fluidized bed boiler, the utility model adds a turbulence device on the horizontal flue at the inlet of the cyclone separator based on cold test and engineering practical application results. The cyclone separator of the circulating fluidized bed boiler can be adjusted in separation efficiency when the disturbance device is started, the original performance of the cyclone separator is not affected when the circulating fluidized bed boiler is stopped, the application of different fuels and different combustion conditions is facilitated, and the application flexibility of the circulating fluidized bed boiler is greatly improved.
As a preferred embodiment of the utility model, the turbulence devices are distributed on the front side, the rear side, the bottom and/or the upper part of the horizontal flue of the cyclone inlet.
As a preferred embodiment of the present utility model, the spoiler comprises at least one set of spouts.
As a preferred scheme of the utility model, the turbulence device comprises three groups of nozzles, wherein one group of nozzles is arranged on the front side of the cyclone separator inlet horizontal flue, and the other two groups of nozzles are arranged on the rear side of the cyclone separator inlet horizontal flue.
As a preferred embodiment of the present utility model, the turbulence device comprises a set of nozzles arranged at the rear side of the cyclone inlet horizontal flue.
As a preferable mode of the utility model, the shape of the nozzle is round or polygonal.
As a preferred embodiment of the utility model, each group of nozzles of the turbulence device is arranged longitudinally in the cyclone inlet horizontal flue.
As a preferable scheme of the utility model, turbulent air sent to the turbulent device by the turbulent device air supply system adopts compressed air for factories, high-pressure fluidized air, primary air of a boiler or air supply of a single fan.
As a preferable scheme of the utility model, turbulent air sent to the turbulent air supply system of the turbulent air supply system is air, flue gas, inert gas, oxidizing gas or reducing gas.
As a preferred embodiment of the utility model, the cyclone inlet horizontal flue is tangentially connected to the cyclone barrel.
The beneficial effects of the utility model are as follows:
On the basis of not changing the overall design of the cyclone separator of the prior circulating fluidized bed boiler, the utility model adds a turbulence device on the horizontal flue at the inlet of the cyclone separator based on cold test and engineering practical application results. The cyclone separator of the circulating fluidized bed boiler can be adjusted in separation efficiency when the disturbance device is started, the original performance of the cyclone separator is not affected when the circulating fluidized bed boiler is stopped, the application of different fuels and different combustion conditions is facilitated, and the application flexibility of the circulating fluidized bed boiler is greatly improved.
Drawings
FIG. 1 is a front view of the present utility model with three sets of spouts;
FIG. 2 is a top view of a portion of the structure of the present utility model when three sets of spouts are provided;
FIG. 3 is a front view of the present utility model with a set of spouts;
FIG. 4 is a top view of a portion of the structure of the present utility model when a set of spouts is provided;
In the figure: 1-a circulating fluidized bed boiler furnace; 2-cyclone separator inlet horizontal flue; 3-turbulence devices; 4-a cyclone separator central cylinder; 5-cyclone separator cylinder; 6-cyclone separator cone section; 7-cyclone stand pipe; 8-a material returning device; 9-turbulent flow device air supply system.
Detailed Description
For the purpose of making the objects, technical solutions and advantages of the embodiments of the present utility model more apparent, the technical solutions of the embodiments of the present utility model will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present utility model, and it is apparent that the described embodiments are some embodiments of the present utility model, but not all embodiments of the present utility model. The components of the embodiments of the present utility model generally described and illustrated in the figures herein may be arranged and designed in a wide variety of different configurations.
Thus, the following detailed description of the embodiments of the utility model, as presented in the figures, is not intended to limit the scope of the utility model, as claimed, but is merely representative of selected embodiments of the utility model. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model. It should be noted that, without conflict, the embodiments of the present utility model and features of the embodiments may be combined with each other.
As shown in fig. 1 to 4, the circulating fluidized bed boiler with the cyclone separator with adjustable separation efficiency in the embodiment comprises a circulating fluidized bed boiler furnace 1, wherein the upper part of the circulating fluidized bed boiler furnace 1 is connected with a cyclone separator inlet horizontal flue 2; the cyclone separator comprises a cyclone separator cylinder 5, a cyclone separator cone section 6 is connected to the lower part of the cyclone separator cylinder 5, a cyclone separator vertical pipe 7 is connected to the lower part of the cyclone separator cone section 6, a material returning device 8 is connected to the lower part of the cyclone separator vertical pipe 7, the material returning device 8 is connected with the circulating fluidized bed boiler hearth 1 through a pipeline, and one end, far away from the circulating fluidized bed boiler hearth 1, of a cyclone separator inlet horizontal flue 2 is connected with the cyclone separator cylinder 5; the cyclone separator also comprises a turbulent flow device air supply system 9, wherein the turbulent flow device 3 is connected to the cyclone separator inlet horizontal flue 2, and the turbulent flow device air supply system 9 is connected with the turbulent flow device 3.
On the basis of not changing the overall design of the cyclone separator of the prior circulating fluidized bed boiler, the utility model adds the turbulence device 3 on the inlet horizontal flue 2 of the cyclone separator based on cold test and engineering practical application results. The cyclone separator of the circulating fluidized bed boiler can be adjusted in separation efficiency when the disturbance device is started, the original performance of the cyclone separator is not affected when the circulating fluidized bed boiler is stopped, the application of different fuels and different combustion conditions is facilitated, and the application flexibility of the circulating fluidized bed boiler is greatly improved.
Wherein the turbulence generating means 3 may be distributed on the front side, rear side, bottom and/or upper part of the cyclone inlet horizontal flue 2. The spoiler 3 comprises at least one set of jets. The shape of the nozzle can be circular, arc-shaped, groove-shaped, square or polygonal. Each group of nozzles of the turbulence devices 3 is arranged longitudinally in the cyclone inlet horizontal flue 2.
As an example, as shown in fig. 1 and 2, the turbulence device 3 includes three groups of nozzles, one group of nozzles being disposed on the front side of the cyclone inlet horizontal flue 2, and the other two groups of nozzles being disposed on the rear side of the cyclone inlet horizontal flue 2.
As another embodiment, as shown in fig. 3 and 4, the turbulence device 3 comprises a set of nozzles arranged at the rear side of the cyclone inlet horizontal flue 2.
In this embodiment, the turbulent air sent to the turbulent air device 3 by the turbulent air device air supply system 9 is supplied by compressed air for factories, high-pressure fluidized air, primary air of a boiler or single fan. The turbulent air sent to the turbulent air supply system 9 is air, flue gas, inert gas, oxidizing gas or reducing gas. The cyclone inlet horizontal flue 2 is tangentially connected with a cyclone cylinder 5.
It should be noted that the turbulence device 3 may be a nozzle for jetting air flow, or may be an air duct, a hood, or the like. The turbulence device 3 can share a nozzle with the SNCR and can be used simultaneously with the SNCR. The utility model can be used for newly designing boilers and can also be used for boiler reconstruction; can be used for the economic adaptability, the deep peak regulation, the flexibility and the steam temperature adjustment of the boiler fire coal. The cyclone inlet horizontal flue 2 and the cyclone cylinder 5 can be connected in a tangential mode or in a non-tangential mode.
When the boiler is in operation and needs to be in load reduction operation, the turbulence device 3 is started, the efficiency of the cyclone separator is reduced, materials trapped and returned to the circulating fluidized bed boiler hearth 1 are reduced, the concentration of circulating ash in the boiler is reduced, the temperature of the hearth is increased, the low-load stable combustion capacity is improved, SNCR denitration reaction is facilitated, and meanwhile, the temperature of smoke entering the tail flue is increased, so that SCR denitration reaction is facilitated.
The cyclone separator of the circulating fluidized bed boiler aims at the characteristics that the cyclone separator of the prior circulating fluidized bed boiler has high separation efficiency but the separation efficiency cannot be adjusted, and the purpose of changing the efficiency of the separator is achieved by arranging the turbulence device 3 at the inlet of the cyclone separator and changing the operation parameters of the turbulence device 3, so that the cyclone separator can be more suitable for the variable working conditions of the boiler.
The turbulence device 3 in the utility model has a simple structure, can realize adjustable separation efficiency only by adding the turbulence device 3 at a proper position of the prior cyclone separator, and has strong practical operability; the problem that the fuel economy adaptability range of the circulating fluidized bed boiler is narrow can be solved, the fuel adaptability of the circulating fluidized bed boiler is expanded, and the fuel flexibility of a unit is improved; can improve the deep peak regulation and combustion stability of the circulating fluidized bed boiler and the combustion economy. The high-temperature stable combustion of 10% load can be realized, and the carbon content of ash slag is low; can improve the temperature of the medium-low load main steam and the reheat steam with lower temperature. The main and reheat steam temperature above 22% load can be achieved to reach the rated value. The inlet smoke temperature of the cyclone separator can be effectively improved, and the SNCR denitration efficiency under medium and low loads is improved. The inlet smoke temperature of the 30% load separator can reach more than 700 ℃, and the inlet smoke temperature of the 40% load separator reaches more than 780 ℃, compared with the conventional lifting of 50-100 ℃. The inlet smoke temperature of the separator is improved, the smoke temperature of the tail flue is improved, and the temperature of the low-load SCR reaction area is improved.
By applying the utility model, the following technical problems can be solved:
the technical problems are as follows: the fuel economy adaptation range of the boiler is narrow.
The circulating fluidized bed boiler technology has wide fuel adaptability, and can burn biomass, construction waste, household waste, papermaking sludge, municipal sludge, cloth waste, oil shale, petroleum coke, coal gangue, coal slime, lignite, lean coal, bituminous coal, anthracite and the like. In general, a circulating fluidized bed boiler is also designed to determine the specific structural design of the boiler by designing fuel, and not a circulating fluidized bed boiler can burn all the fuels, and the fuel adaptability of the circulating fluidized bed boiler also has a certain range at the design point. When the fuel change is small, the operation parameters can be relatively normal through the self-adaption of the boiler, but when the fuel change is large, a good adjusting means is not needed, the operation parameters can be changed greatly, and the economy of the boiler is poor or the boiler is difficult to adapt. For circulating fluidized bed fuel, mainly looking at fuel ash and heat value, it directly affects the circulating ash concentration in the furnace, for example when the heat value of fuel is reduced and ash is raised, the circulating ash concentration in the furnace is raised, and the furnace temperature is lowered because the separation efficiency of the separator is unchanged, at this time, if the efficiency of the separator can be changed and the efficiency of the separator is lowered, the circulating ash concentration and the furnace temperature can be controlled, so that the operation parameters are normal, and the fuel adaptability range of the boiler can be expanded.
The technical problems are as follows: and the deep peak regulation and combustion stability characteristics and the combustion economy of the circulating fluidized bed boiler are improved.
The circulating fluidized bed boiler technology has good low-load stable combustion characteristic due to the high-capacity thermal-state bed material of the hearth, and the conventional coal can realize stable combustion without oil when the load of 30% BMCR is applied at present. Most of the current circulating fluidized bed boiler projects can realize the deep peak shaving of 30% load, but the load is reduced downwards, the problem of poor stable combustion can be faced, and particularly for coal with high ash content and low heat value. If the efficiency of the separator can be reduced at this time, so that the circulating ash amount in the furnace is reduced, the temperature of the hearth can be increased, the stable combustion characteristic is improved, and the boiler can realize stable combustion with lower load. Because the hearth temperature is low, the burnout of the fuel is poor, and the burnout of the fuel can be improved by reducing the efficiency of the separator and improving the hearth temperature, so that the combustion economy of the boiler is improved.
The technical problems are as follows: the temperature of the medium and low load main steam and the temperature of the reheat steam are lower.
And when the load of the boiler is reduced, the combustion in the boiler is weakened, the temperature of a hearth is low, the temperature of a tail flue is low, the conventional fluidized bed boiler generally meets the requirement that the main and reheat steam temperatures of 40% of the load and above reach the rated value, and the main and reheat steam temperatures of the load and below 40% can not reach the rated value. If the separator efficiency can be reduced at this time, so that the circulating ash amount in the furnace is reduced, the convection heat transfer coefficient of the water-cooled wall can be reduced, so that the heat absorption of the water side is weakened, and the heat transfer coefficient of the evaporation side is slightly influenced by the circulating ash concentration due to the main screen type and the arrangement of the main screen type and the tail flue, so that the original heat absorption balance ratio of the water side and the evaporation side can be changed (the water side is reduced, the evaporation side is increased), and the main and reheat steam temperature of the boiler can reach the rated value under lower load.
Technical problems are as follows: the SNCR denitration temperature window with medium and low load is lost, and finally the emission of the nitrogen oxides is difficult to reach the standard.
And the same technical problem is that the temperature of a hearth of a conventional circulating fluidized bed boiler is reduced along with the reduction of load. When operating at 40% load and below, the cyclone inlet flue gas temperature is typically around 700 ℃, at which time SNCR denitration efficiency is very low. And the load is further reduced to 30%, the inlet smoke temperature of the cyclone separator is about 650 ℃, and the SNCR denitration is basically ineffective, so that the final emission of the nitrogen oxides is difficult to control, and the ultra-low emission requirement cannot be met. If the efficiency of the separator can be reduced at this time, the circulating ash amount in the furnace is reduced, the temperature of the hearth can be increased, the temperature of smoke at the inlet of the separator is increased, the temperature of an SNCR reaction window is reached, and the emission of nitrogen oxides is controlled.
From an analysis of the above technical problems, it can be seen that they can be improved and solved by changing the separation efficiency of the separator. The utility model provides a circulating fluidized bed boiler with adjustable separation efficiency, which can realize the adjustable separation efficiency, further adjust the circulating ash concentration in the boiler, change the heat transfer in the boiler and adjust the temperature of a hearth, so as to solve various technical problems caused by the change of fuel characteristics, the deep peak regulation of the boiler and the low-load denitration.
The cyclone separator used in the utility model has a mature structure applied in engineering and has high basic separation efficiency. On the basis, by arranging the turbulence device 3 at the inlet of the cyclone separator, the separation efficiency of the separator is not affected when the turbulence device 3 is not started; when the turbulence device 3 is started, air flow is sprayed into the separator, so that the flow field in the separator is changed, the separation efficiency is reduced, and the concentration of circulating ash in the furnace is reduced due to the reduction of the separation efficiency.
In practical applications, the amount of disturbance air flow is adjusted according to the requirements of the boiler operation parameters. For example, when the main purpose of the operation of the boiler is to improve the low-load stable combustion characteristic, the bed temperature is taken as a target parameter to adjust the disturbance air flow; for example, when the main purpose of boiler operation is to raise the inlet smoke temperature of the separator, so that the SNCR denitration efficiency is higher, then the inlet smoke temperature of the separator and the denitration agent dosage are taken as target parameters to adjust the disturbance air flow; for example, when the main purpose of the operation of the boiler is to raise the temperature of the main steam and the reheat steam, the main steam temperature and the reheat steam temperature are taken as target parameters to adjust disturbance air flow; for example, when the main purpose of the operation of the boiler is to improve the fuel adaptability, the temperature of the hearth, denitration and steam parameters and the like are required to be comprehensive target parameters to adjust disturbance air flow, so that even if the fuel is changed greatly, the overall parameters and economy of the boiler are changed little.
The utility model is suitable for the reconstruction of new CFB boilers and in-service CFB boilers and other requirements for adjusting the separation efficiency of the separator.
The utility model is not limited to the above-described alternative embodiments, and any person who may derive other various forms of products in the light of the present utility model, however, any changes in shape or structure thereof, all falling within the technical solutions defined in the scope of the claims of the present utility model, fall within the scope of protection of the present utility model.
Claims (10)
1. The utility model provides a cyclone separation efficiency adjustable circulating fluidized bed boiler which characterized in that: comprises a circulating fluidized bed boiler furnace (1), wherein the upper part of the circulating fluidized bed boiler furnace (1) is connected with a cyclone separator inlet horizontal flue (2); the cyclone separator comprises a cyclone separator cylinder body (5), the lower part of the cyclone separator cylinder body (5) is connected with a cyclone separator cone section (6), the lower part of the cyclone separator cone section (6) is connected with a cyclone separator vertical pipe (7), the lower part of the cyclone separator vertical pipe (7) is connected with a material returning device (8), the material returning device (8) is connected with the circulating fluidized bed boiler furnace (1) through a pipeline, and one end, far away from the circulating fluidized bed boiler furnace (1), of a cyclone separator inlet horizontal flue (2) is connected with the cyclone separator cylinder body (5); the cyclone separator also comprises a turbulent flow device air supply system (9), wherein the turbulent flow device (3) is connected to the cyclone separator inlet horizontal flue (2), and the turbulent flow device air supply system (9) is connected with the turbulent flow device (3).
2. A circulating fluidized bed boiler with adjustable separation efficiency of cyclone separator according to claim 1, characterized in that: the turbulence devices (3) are distributed at the front side, the rear side, the bottom and/or the upper part of the cyclone separator inlet horizontal flue (2).
3. A circulating fluidized bed boiler with adjustable separation efficiency of cyclone separator according to claim 1, characterized in that: the turbulence device (3) comprises at least one set of jets.
4. A circulating fluidized bed boiler with adjustable separation efficiency of cyclone separator according to claim 3, characterized in that: the turbulence device (3) comprises three groups of nozzles, wherein one group of nozzles is arranged on the front side of the cyclone separator inlet horizontal flue (2), and the other two groups of nozzles are arranged on the rear side of the cyclone separator inlet horizontal flue (2).
5. A circulating fluidized bed boiler with adjustable separation efficiency of cyclone separator according to claim 3, characterized in that: the turbulence device (3) comprises a group of nozzles which are arranged at the rear side of the cyclone separator inlet horizontal flue (2).
6. A circulating fluidized bed boiler with adjustable separation efficiency of cyclone separator according to claim 3, characterized in that: the shape of the nozzle is round or polygonal.
7. A circulating fluidized bed boiler with adjustable separation efficiency of cyclone separator according to claim 3, characterized in that: each group of nozzles of the turbulence device (3) is longitudinally arranged in the cyclone separator inlet horizontal flue (2).
8. A circulating fluidized bed boiler with adjustable separation efficiency of cyclone separator according to claim 1, characterized in that: the turbulent air sent to the turbulent device (3) by the turbulent air supply system (9) adopts plant compressed air, high-pressure fluidized air, primary and secondary air of a boiler or air supply of a single fan.
9. A circulating fluidized bed boiler with adjustable separation efficiency of cyclone separator according to claim 1, characterized in that: the turbulent air sent to the turbulent device (3) by the turbulent air supply system (9) is air, flue gas, inert gas, oxidizing gas or reducing gas.
10. A circulating fluidized bed boiler with adjustable separation efficiency of cyclone separator according to claim 1, characterized in that: the cyclone separator inlet horizontal flue (2) is tangentially connected with the cyclone separator cylinder (5).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202322521836.3U CN220870852U (en) | 2023-09-15 | 2023-09-15 | Cyclone separator separation efficiency adjustable circulating fluidized bed boiler |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202322521836.3U CN220870852U (en) | 2023-09-15 | 2023-09-15 | Cyclone separator separation efficiency adjustable circulating fluidized bed boiler |
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| Publication Number | Publication Date |
|---|---|
| CN220870852U true CN220870852U (en) | 2024-04-30 |
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|---|---|---|---|
| CN202322521836.3U Active CN220870852U (en) | 2023-09-15 | 2023-09-15 | Cyclone separator separation efficiency adjustable circulating fluidized bed boiler |
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| Country | Link |
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2023
- 2023-09-15 CN CN202322521836.3U patent/CN220870852U/en active Active
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