CN105043714A - Simulation test device and method of three-dimensional flow field in CFB boiler - Google Patents
Simulation test device and method of three-dimensional flow field in CFB boiler Download PDFInfo
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- CN105043714A CN105043714A CN201510402314.9A CN201510402314A CN105043714A CN 105043714 A CN105043714 A CN 105043714A CN 201510402314 A CN201510402314 A CN 201510402314A CN 105043714 A CN105043714 A CN 105043714A
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Abstract
The invention discloses a simulation test device and method of a three-dimensional flow field in a CFB boiler. With the device and method adopted, the dynamic flowing process of particles can be obtained. The simulation test device of the three-dimensional flow field in the CFB boiler includes a test box, a material distributing device, a separation device, a material returning device, an air blower, an induced draft fan, a detection device and a computer; the upper end of the test box is provided with an air exhaust opening; the lower end of the test box is provided with an air blowing opening; the test box is also provided with a material feeding opening and a material returning opening located between the air exhaust opening and the air blowing opening; the material distributing device is communicated with the material feeding opening; the air inlet of the separation device is communicated with the air exhaust opening; the backflow opening of the separation device is communicated with the inlet of the material returning device; the discharging opening of the separation device is communicated with the induced draft fan; the outlet of the material returning device is communicated with the material returning opening; the air blower is communicated with the air blowing opening; the detection device includes a light generator and a photographing device; the light source of the light generator forms a light region in the test box; the photographing focus of the photographing device falls in the light region; and the photographing device is connected with the computer.
Description
Technical field
The present invention relates to CFB Simulation of Boiler experimental technique field, particularly the simulation test device of three-dimensional flow field and method in a kind of CFB boiler.
Background technology
Recirculating fluidized bed (being called for short CFB) boiler is a kind of novel clean coal-burning facility grown up in the last thirty years, there is pollutant emission and control cost that low, fuel wide accommodation, peak modulation capacity are strong, burning efficiency advantages of higher, particularly for burning of coal inferior, there is good energy saving standard usefulness.
The basis of CFB boiler heat-transfer mechanism is its Gas-solid Flow Characteristics.For the research of CFB boiler, usually business cfdrc (ComputationalFluidDynamics is utilized, be called for short CFD) numerical simulation is carried out to internal flow characteristics, the model of numerical simulation not only needs structurally to make many simplification, the result of simulation is also based on more assumed condition, the authenticity of data is difficult to be confirmed, the static nature in what the result of study under the assumed condition of this external stable state showed is flow field.In test, the speed of flow field point can only be embodied, if build the speed with direction vector of appearing by the flow field of regional area in burner hearth mobility status within a certain period of time and more deep understanding will be had to the abrasion condition of stove internal face.
Summary of the invention
Based on this, the invention reside in the defect overcoming prior art, simulation test device and the method for three-dimensional flow field in a kind of CFB boiler are provided, the three-dimensional flow field in CFB boiler can be simulated, and particle speed is measured, draw out three-dimensional flow field polar plot, obtain the mobilism flow process of particle.
Its technical scheme is as follows:
The simulation test device of three-dimensional flow field in a kind of CFB boiler, comprise test casing, issuance of materials device, tripping device, material-returning device, fan blower, induced draft fan, pick-up unit, computing machine, described test casing upper end is provided with exhausr port, described test casing lower end is provided with blast orifice, described test casing is upper is also provided with charging aperture and returning charge mouth between exhausr port and blast orifice, described issuance of materials device is communicated with described charging aperture, the air intake opening of described tripping device is communicated with described exhausr port, the refluxing opening of described tripping device is communicated with the entrance of material-returning device, the escape hole of described tripping device is communicated with induced draft fan, the outlet of described material-returning device is communicated with described returning charge mouth, described fan blower is communicated with described blast orifice, described pick-up unit comprises optical generator, filming apparatus, the light source of described optical generator forms light district in test casing, the shooting focus of described filming apparatus drops in described smooth district, described filming apparatus is connected with computing machine.
Wherein in an embodiment, the light source of described optical generator is sheet light, and described filming apparatus comprises the first CCD camera, the second CCD camera, and the shooting focus of described first CCD camera, the second CCD camera drops on the same area in described smooth district.
Wherein in an embodiment, in described CFB boiler, the simulation test device of three-dimensional flow field also comprises synchronizer trigger, and described synchronizer trigger is electrically connected with the first CCD camera, the second CCD camera, optical generator respectively.
Wherein in an embodiment, in described CFB boiler, the simulation test device of three-dimensional flow field also comprises mounting guide rail, described optical generator, the first CCD camera, the second CCD camera are slidably mounted on mounting guide rail, and the first CCD camera is arranged on mounting guide rail one end, second CCD camera is arranged on the mounting guide rail other end, and described optical generator is arranged between the first CCD camera and the second CCD camera.
Wherein in an embodiment, in described CFB boiler, the simulation test device of three-dimensional flow field also comprises lifting table, and described mounting guide rail is arranged on lifting table.
Wherein in an embodiment, described test casing adopts organic glass to make.
Wherein in an embodiment, described optical generator is YAG laser generator.
The present invention also provides the simulation experiment method of three-dimensional flow field in a kind of CFB boiler, comprises the following steps:
In CFB boiler, the simulation test device of three-dimensional flow field starts;
Regulate optical generator, make its light source in flow field, form light district;
Synchronizer trigger controls optical generator and filming apparatus and synchronously triggers, filming apparatus collection at least two characteristic images;
Characteristic image is delivered in computing machine and processes by filming apparatus;
Computing machine draws the three-dimensional flow field in the simulation test device of three-dimensional flow field in CFB boiler.
The simulation experiment method of three-dimensional flow field in described CFB boiler, before in CFB boiler, the simulation test device of three-dimensional flow field starts, further comprising the steps of:
The exposure time interval of filming apparatus and group number are set.
The simulation experiment method of three-dimensional flow field in described CFB boiler, specifically comprises the following steps:
Regulate the height of lifting table, to obtain the flow field data of different cross section in test casing.
Below the advantage of preceding solution or principle are described:
The simulation test device of three-dimensional flow field in above-mentioned CFB boiler, material is sent in test casing through issuance of materials device, fan blower is blown by blast orifice, being entrained in test casing by air after goods fluid moves upward at the differing heights of test casing, part bulky grain along the landing of test cabinet wall, will form the Inner eycle of material; Less particle enters in tripping device with air and is separated, and the bulky grain of the overwhelming majority is separated to get off, and is again got back in test casing, form the outer circulation of material by material-returning device; And the bottom that the bulky grain of non-fluidisation is deposited on test casing becomes bed material wait fluidisation, achieve the simulation of three-dimensional flow field in CFB boiler.The light illuminating flow field of optical generator forms light district, filming apparatus stream field carries out shooting record, computing machine is utilized to process photographed data, the instantaneous velocity field in flow field and vector data can be obtained, and obtain Three-Dimensional Dynamic flow field data, wear extent can also be calculated whereby, the guidance on theory and technology is provided for on-the-spot actual cycle fluidized-bed combustion boiler abrasionproof.
The simulation experiment method of three-dimensional flow field in above-mentioned CFB boiler, the simulation test device of three-dimensional flow field in CFB boiler is utilized to simulate real CFB boiler flow field, and be combined with the image that filming apparatus is taken continuously, instantaneous velocity field in flow field and vector data is calculated by Computer, finally draw out three-dimensional flow field polar plot, obtain the mobilism flow process of particle, effectively can carry out more deep research to Circulating Fluidized Bed Boiler.
Accompanying drawing explanation
Fig. 1 is the structural representation of the simulation test device of three-dimensional flow field in the CFB boiler described in the embodiment of the present invention;
Fig. 2 is the schematic top plan view of the simulation test device of three-dimensional flow field in the CFB boiler described in the embodiment of the present invention;
Fig. 3 is the process flow diagram of the simulation experiment method of three-dimensional flow field in the CFB boiler described in the embodiment of the present invention.
Description of reference numerals:
1, casing is tested, 2, issuance of materials device, 3, tripping device, 4, material-returning device, 5, optical generator, the 6, first CCD camera, 7, the second CCD camera, 8, mounting guide rail, 10, exhausr port, 11, blast orifice, 12, charging aperture, 13, returning charge mouth, 30, air intake opening, 31, refluxing opening, 32, escape hole.
Embodiment
Below embodiments of the invention are described in detail:
As Fig. 1, shown in 2, the simulation test device of three-dimensional flow field in CFB boiler described in the present embodiment, comprise test casing 1, issuance of materials device 2, tripping device 3, material-returning device 4, fan blower (not shown), induced draft fan (not shown), pick-up unit, computing machine (not shown), described test casing 1 upper end is provided with exhausr port 10, described test casing 1 lower end is provided with blast orifice 11, described test casing 1 is also provided with charging aperture 12 and returning charge mouth 13 between exhausr port 10 and blast orifice 11, described issuance of materials device 2 is communicated with described charging aperture 12, the returning charge mouth 13 of described tripping device 3 is communicated with described exhausr port 10, the refluxing opening 31 of described tripping device 3 is communicated with the entrance of material-returning device 4, the escape hole 32 of described tripping device 3 is communicated with induced draft fan, the outlet of described material-returning device 4 is communicated with described returning charge mouth 13, described fan blower is communicated with described blast orifice 11, described pick-up unit comprises optical generator 5, filming apparatus, the light source of described optical generator 5 forms light district in test casing 1, the shooting focus of described filming apparatus drops in described smooth district, described filming apparatus is connected with computing machine.
The simulation test device of three-dimensional flow field in above-mentioned CFB boiler, material is sent in test casing 1 through issuance of materials device 2, fan blower is blown by blast orifice 11, being entrained in test casing 1 by air after goods fluid moves upward at the differing heights of test casing 1, part bulky grain along the landing of test casing 1 inwall, will form the Inner eycle of material; Less particle enters in tripping device 3 with air and is separated, and the bulky grain of the overwhelming majority is separated to get off, and is again got back in test casing 1, form the outer circulation of material by material-returning device 4; And the bottom that the bulky grain of non-fluidisation is deposited on test casing 1 becomes bed material wait fluidisation, achieve the simulation of three-dimensional flow field in CFB boiler.The light illuminating flow field of optical generator 5 forms light district, filming apparatus stream field carries out shooting record, computing machine is utilized to process photographed data, the instantaneous velocity field in flow field and vector data can be obtained, and obtain Three-Dimensional Dynamic flow field data, wear extent can also be calculated whereby, the guidance on theory and technology is provided for on-the-spot actual cycle fluidized-bed combustion boiler abrasionproof.
In the present embodiment, the light source of described optical generator 5 is sheet light, described filming apparatus comprises the first CCD camera 6, second CCD camera 7, the shooting focus of described first CCD camera 6, second CCD camera 7 drops on the same area in described smooth district, the image of two cameras capture the same areas, to make the trivector data more true and accurate in cross section, flow field.
In CFB boiler described in the present embodiment, the simulation test device of three-dimensional flow field also comprises synchronizer trigger, described synchronizer trigger is electrically connected with the first CCD camera 6, second CCD camera 7 respectively, first CCD camera 6, second CCD camera 7 keeps synchronous by synchronizer trigger with optical generator 5, namely, when optical generator 5 is luminous, the first CCD camera 6, second CCD camera 7 takes record picture simultaneously.
As shown in Figure 2, in described CFB boiler, the simulation test device of three-dimensional flow field also comprises mounting guide rail 8, described optical generator 5, first CCD camera 6, second CCD camera 7 is slidably mounted on mounting guide rail 8, and the first CCD camera 6 is arranged on mounting guide rail 8 one end, second CCD camera 7 is arranged on mounting guide rail 8 other end, described optical generator 5 is arranged between the first CCD camera 6 and the second CCD camera 7, can adjust the position between optical generator 5, first CCD camera 6, second CCD camera 7 easily by mounting guide rail 8.
In the present embodiment, in described CFB boiler, the simulation test device of three-dimensional flow field also comprises lifting table (not shown), described mounting guide rail 8 is arranged on lifting table, by adjusting the height of lifting table, the measurement of the data such as velocity flow profile, vector motion direction can be carried out by region-wide interior arbitrary section to the test casing 1 under different cross section.
Preferably, described test casing 1 adopts organic glass to make.Because organic glass is transparent, therefore optical generator 5 and filming apparatus do not need to get involved flow field, extend the serviceable life of equipment while convenient change position yet.
In the present embodiment, described optical generator 5 is YAG laser generator, its compact conformation, lightweight, easy to use reliable, maintenance requirement is lower, and other equipment also can be adopted in other embodiments as optical generator 5.
With reference to Fig. 3, the present invention also provides the simulation experiment method of three-dimensional flow field in a kind of CFB boiler, comprises the following steps:
In CFB boiler, the simulation test device of three-dimensional flow field starts;
Regulate optical generator 5, make its light source in flow field, form light district;
Synchronizer trigger controls optical generator 5 and filming apparatus and synchronously triggers, filming apparatus collection at least two characteristic images;
Characteristic image is delivered in computing machine and processes by filming apparatus;
Computing machine draws the three-dimensional flow field in the simulation test device of three-dimensional flow field in CFB boiler.
The simulation experiment method of three-dimensional flow field in above-mentioned CFB boiler, the simulation test device of three-dimensional flow field in CFB boiler is utilized to simulate real CFB boiler flow field, and be combined with the image that filming apparatus is taken continuously, instantaneous velocity field in flow field and vector data is calculated by Computer, finally draw out three-dimensional flow field polar plot, obtain the mobilism flow process of particle, effectively can carry out more deep research to Circulating Fluidized Bed Boiler.
The simulation experiment method of three-dimensional flow field in described CFB boiler, before in CFB boiler, the simulation test device of three-dimensional flow field starts, further comprising the steps of:
Regulate optical generator 5, its light source is made to form light district in test casing 1, for the shooting of filming apparatus is ready, then filming apparatus, make it take focus to drop in described smooth district, make it get a clear view effectively, the exposure time interval of filming apparatus and group number are finally set, shooting can reflect the instantaneous velocity of particle in flow field more realistically continuously at short notice, namely obtains the flow field data of mobilism finally by the data in conjunction with each cross section by computing machine.
The simulation experiment method of three-dimensional flow field in described CFB boiler, further comprising the steps of:
Regulate the height of lifting table, to obtain the flow field data of different cross section in test casing 1, by adjusting the height of lifting table, the measurement of the data such as velocity flow profile, vector motion direction can be carried out by region-wide interior arbitrary section to the test casing 1 under different cross section, thus effectively study the abrasion condition on CFB boiler wall differing heights.
Each technical characteristic of the above embodiment can combine arbitrarily, for making description succinct, the all possible combination of each technical characteristic in above-described embodiment is not all described, but, as long as the combination of these technical characteristics does not exist contradiction, be all considered to be the scope that this instructions is recorded.
The above embodiment only have expressed several embodiment of the present invention, and it describes comparatively concrete and detailed, but can not therefore be construed as limiting the scope of the patent.It should be pointed out that for the person of ordinary skill of the art, without departing from the inventive concept of the premise, can also make some distortion and improvement, these all belong to protection scope of the present invention.Therefore, the protection domain of patent of the present invention should be as the criterion with claims.
Claims (10)
1. the simulation test device of three-dimensional flow field in a CFB boiler, it is characterized in that, comprise test casing, issuance of materials device, tripping device, material-returning device, fan blower, induced draft fan, pick-up unit, computing machine, described test casing upper end is provided with exhausr port, described test casing lower end is provided with blast orifice, described test casing is upper is also provided with charging aperture and returning charge mouth between exhausr port and blast orifice, described issuance of materials device is communicated with described charging aperture, the air intake opening of described tripping device is communicated with described exhausr port, the refluxing opening of described tripping device is communicated with the entrance of material-returning device, the escape hole of described tripping device is communicated with induced draft fan, the outlet of described material-returning device is communicated with described returning charge mouth, described fan blower is communicated with described blast orifice, described pick-up unit comprises optical generator, filming apparatus, the light source of described optical generator forms light district in test casing, the shooting focus of described filming apparatus drops in described smooth district, described filming apparatus is connected with computing machine.
2. the simulation test device of three-dimensional flow field in CFB boiler according to claim 1, it is characterized in that, the light source of described optical generator is sheet light, described filming apparatus comprises the first CCD camera, the second CCD camera, and the shooting focus of described first CCD camera, the second CCD camera drops on the same area in described smooth district.
3. the simulation test device of three-dimensional flow field in CFB boiler according to claim 2, it is characterized in that, also comprise synchronizer trigger, described synchronizer trigger is electrically connected with the first CCD camera, the second CCD camera, optical generator respectively.
4. the simulation test device of three-dimensional flow field in the CFB boiler according to any one of claim 2-3, it is characterized in that, also comprise mounting guide rail, described optical generator, the first CCD camera, the second CCD camera are slidably mounted on mounting guide rail, and the first CCD camera is arranged on mounting guide rail one end, second CCD camera is arranged on the mounting guide rail other end, and described optical generator is arranged between the first CCD camera and the second CCD camera.
5. the simulation test device of three-dimensional flow field in CFB boiler according to claim 4, it is characterized in that, also comprise lifting table, described mounting guide rail is arranged on lifting table.
6. the simulation test device of three-dimensional flow field in CFB boiler according to claim 4, is characterized in that, described test casing adopts organic glass to make.
7. the simulation test device of three-dimensional flow field in CFB boiler according to claim 4, it is characterized in that, described optical generator is YAG laser generator.
8. the simulation experiment method of three-dimensional flow field in CFB boiler, is characterized in that, comprise the following steps:
In CFB boiler, the simulation test device of three-dimensional flow field starts;
Regulate optical generator, make its light source in flow field, form light district;
Synchronizer trigger controls optical generator and filming apparatus and synchronously triggers, filming apparatus collection at least two characteristic images;
Characteristic image is delivered in computing machine and processes by filming apparatus;
Computing machine draws the three-dimensional flow field in the simulation test device of three-dimensional flow field in CFB boiler.
9. the simulation experiment method of three-dimensional flow field in CFB boiler according to claim 8, is characterized in that, before in CFB boiler, the simulation test device of three-dimensional flow field starts, further comprising the steps of:
The exposure time interval of filming apparatus and group number are set.
10. the simulation experiment method of three-dimensional flow field in CFB boiler according to claim 8, is characterized in that, further comprising the steps of:
Regulate the height of lifting table, to obtain the flow field data of different cross section in test casing.
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| CN201510402314.9A CN105043714A (en) | 2015-07-09 | 2015-07-09 | Simulation test device and method of three-dimensional flow field in CFB boiler |
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Application publication date: 20151111 |