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Ontario Hydro's R&D on Sorbent Injection Waste Part II. Handling and Disposal

Published online by Cambridge University Press:  21 February 2011

Arnold Golomb  and
Babu R. Nott
Arnold Golomb
Affiliation:
Ontario Hydro Research Division, 800 Kipling Avenue, Toronto, Ontario, Canada, M8Z 5S4
Babu R. Nott
Affiliation:
Ontario Hydro Research Division, 800 Kipling Avenue, Toronto, Ontario, Canada, M8Z 5S4
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Summary

Canadian utilities are investigating the use of Furnace Sorbent Injection (FSI) for control of acid gas emissions from thermal generating stations. Typically, limestone or slaked lime is injected into the furnace [1,2] and is calcined to calcium oxide (CaO), which reacts with sulphur dioxide (SO2) and oxygen, forming calcium sulphate:

or

The by-product is removed with the fly ash, using back-end particulate control equipment. The resulting solid waste usually contains substantial amounts (e.g., 20 to 40% w/w) of unreacted CaO, which can cause handling and disposal problems because of its vigorous exothermic reaction on contact with water:

The solid waste can set prematurely in the handling equipment. It can also produce a harmful dust and/or yield a highly alkaline leachate that could affect local ground and/or surface water supplies.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 136: Symposium O – Fly Ash and Coal Conversion By-Products V , 1988 , 51
Copyright
Copyright © Materials Research Society 1989

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References

REFERENCES

1. Mozes, M.S., Mangal, R., Thampi, R. and Tubman, D., “Sorbent Injection for SO2 Control,” Ontario Hydro Research Division Report No. 88-63-K, published August 5, 1988.Google Scholar
2. Golomb, A. and Nott, B.R., “Ontario Hydro's R&D on Sorbent Injection for SO2 Control. Part 2- Waste Characterization,” paper presented at EPRI Conference on Effects of Coal Quality on Power Plants, Atlanta, GA, October 13–15, 1987.Google Scholar
3. Canadian Electrical Institute Research Report No. 717 G 620, prepared by Ontario Hydro Research Division (in preparation).Google Scholar
4. Hueller, R. and Dietl, R., Zement-Kalk-Gips, 10, 292 (1984).Google Scholar
5. “Fly Ash Conditioning,” (Technical publication by Eirich Machines Ltd., Maple, Ontario, 1988).Google Scholar
6. “Interim Guidelines for the Interpretation of the Hazardous Waste Definition (Regulation 309),” published by the Ontario Ministry of the Environment, March, 1983. (Revised October, 1984 and finalized November, 1985 under the Environmental Protection Act, General - Waste Management, as Ontario Regulation 322/84).CrossRefGoogle Scholar