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  Oil Shale

ISSN 1736-7492 (electronic)  ISSN 0208-189X (print)
Published since 1984

Oil Shale

ISSN 1736-7492 (electronic)  ISSN 0208-189X (print)
Published since 1984
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SHORT-TERM TESTS ON FIRING OIL SHALE FUEL APPLYING LOW-TEMPERATURE VORTEX TECHNOLOGY; pp. 3–17
(Full article in PDF format)   doi: 10.3176/oil.2012.1.02


Authors

T. PIHU, A. KONIST, D. NESHUMAYEV, J. LOOSAAR, A. SIIRDE, T. PARVE, A. MOLODTSOV

Abstract

The present paper provides experimental data from short-term, full-scale experiments of a high-pressure pulverized firing (PF) boiler, TP-67, firing oil shale after a retrofit to use vortex combustion (VC) technology. The essence of VC technology consists of the generation, at a lower part of the furnace, of a circulatory motion of gas relative to the horizontal axis (horizontal vortex) by rearranging the geometry of the combustion air injection and the fuel feed­ing into the combustion chamber. The tests were conducted at three boiler loads: 50% (160 t/h), 75% (240 t/h) and 100% (320 t/h). During the experiments, fuel samples of air-solids in the conduit and samples of bottom ash and fly ash from inertia dust collectors after the super heater (SH) and economizer (ECO), as well as fly ash from the electrostatic precipitator (ESP) of the first and second fields, were taken from both the left and the right sides of the boiler. The gas analysis was performed at the ESP exit. It was attempted to measure temperature distribution in the combustion chamber. Temperature measurements in the furnace using an infrared thermo­meter showed that the maximum temperature did not exceed 1150 °C, and there was slight temperature nonuniformity across the combustion chamber. During the tests, the ash distribution at different boiler ash dis­charge ports was obtained. Analysis of the bottom ash chemical composition showed a considerable increase in the amount of unburned carbon and marcasite Sp. The retrofit of the boiler to use VC technology did not result in a reduction in the amount of SO2 emissions, indicating an even weaker pro­cess of binding sulphur oxides in the furnace as compared to PF.



References

  1. Rundygin , Y. Low-Temperature Firing of Oil Shale. – Leningrad: Energoizdat , 1987 [in Russian].

  2. Ots , A. Oil Shale Fuel Combustion. – Tallinn: Eesti Energia AS , 2006 , 833 pp.

  3. Ots , A. , Prikk , A. , Arro , H. , Rundygin , Y. , Konovich , M. An investigation of fly-ash chemical composition in vortical burning of oil-shale // Transactions of Tallinn Polytechnical Institute. 1977. Series A , No. 416. P. 91–100 [in Russian].

  4. Ots , A. , Prikk , A. , Arro , H. , Rundygin , Y. , Konovich , M. An investigation of oil-shale mineral matter conversion in vortical burning // Transactions of Tallinn Polytechnical Institute. 1977. Series A , No. 416. P. 79–84 [in Russian].

  5. Ots , A. , Prikk , A. , Arro , H. , Rundygin , Y. , Konovich , M. Fly-ash grain com­posi­tion in vortical burning of oil-shale // Transactions of Tallinn Polytechnical Institute. 1977. Series A , No. 416. P. 85–90 [in Russian].

  6. Ots , A. , Prikk , A. , Arro , H. , Rundygin , Y. , Konovich , M. , Schuchkin , I. The nature of ash deposits on the tubes of convective super-heater in vortical burning of oil-shale // Transactions of Tallinn Polytechnical Institute. 1977. Series A , No. 416. P. 109–116 [in Russian].

  7. Pomerantsev , V. , Rundygin , Y. , Konovich , M. , Lysakov , I. , Marjamchik , M. , Ots , A. , Arro , H. , Prikk , A. Study and improvement of low-temperature vortex firing of oil shale in medium-pressure boilers // Transactions of Tallinn Polytechnical Institute. 1977. Series A , No. 416. P. 65–78 [in Russian].

  8 Prikk , A. , Ingermann , K. , Touart , R. , Rundygin , Y. Wastage of screen-super heater tubes in the low-temperature vortical furnace by water soot-blowing // Transactions of Tallinn Polytechnical Institute. 1980. Series A , No. 483. P. 99–107 [in Russian].

  9. Prikk , A. , Shchuchkin , I. Ash wearing of water-economizer tubes of boiler
BKZ-75-39-F with vortex furnace arrangement // Transactions of Tallinn Poly­technical Institute. 1981. Series A , No. 502. P. 19–28 [in Russian].

10. Ots , A. , Prikk , A. , Arro , H. , Rundygin , Y. , Konovich , M. On the nature of ash deposits on furnace platens in vortex firing of oil shale // Transactions of Tallinn Polytechnical Institute. 1977. series A , No. 416. P. 101–108 [in Russian].

11. Pihu , T. , Arro , H. , Prikk , A. , Neshumayev , D. , Loosaar , J. , Parve , T. , Konist , A. , Rootamm , R. , Nuutre , M. , Aluvee , R. Boiler No. 26 thermal test at Balti Power Plant. – Research report of TUT , 2010. 80 pp [in Estonian].

 
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No. 1: 20 March
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