Sugar plants, when they go in for cogeneration have to install high pressure boilers of 66ata and above with a definite aim to generate surplus power for feeding to the grid. High pressure boilers with 75kg/cm2 are normally designed close to the limiting conditions of the heat transfer, tube metal temperature, circulation etc. to make the units compact and economical.
The principal problem in modern high pressure boilers is the control of corrosion and steam quality. Internal corrosion and deposition may cost the sugar plants lakhs of rupees in repairs and lost availability. Modern steam turbines rated for high capacities call for stringent steam quality to avoid damages. Without strict control of impurities in steam, deposits will be formed over turbine blades and nozzles and output will be reduced. Thus the successful operation of high pressure boiler / turbine units require a thorough understanding of the aspects of water treatment.
Water treatment is very important in high pressure boilers to protect the system from corrosion, scale and deposits. Total solids and silica are required to be maintained at low levels in drum water at high pressures to maintain desired steam quality. Silica, in particular, is carried over in the form of a vapour at high pressures and the amount of silica needs to be maintained very low for example at less than 0.4 ppm at a drum operating pressure of 75 kg/m2(g).
Feed water is used as desuperheating spray and any contamination or feed water directly enters superheated steam. Impure feed water increases blow down which is uneconomical. Hence feed water is to be very pure for high pressure boilers. This, in turn, necessitates high purity for make-up water. Demineralisation can only produce acceptable make-up quality for high pressure boilers of the order of specific electrical conductivity less than 0.5 mmho/cm with hardness completely removed and silica less than 0.02 ppm. When dissolved solids are removed by demineralisation, suspended solids, organic matter and turbidity are to be removed in the pretreatment stage normally comprising of chlorination, coagulation, clarification and filtration. The removal of suspended impurities is important for efficient operation of demineralised and to avoid problems inside boilers.
Source: http://www.zgsteamboiler.com/solution/High-Pressure-Boiler-75kgcm2-Water-Parameters-in-Sugar-Plant.html
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Packaging Detail:Wooden box package of High Pressure Boiler 75kg/cm2 Water Parameters in Sugar Plant
Delivery Detail:20-40 days after payment
We have over 70 years' experience of industrial steam boiler and autoclave, and we have a professional installation and after-sales staff for products.Take advantage of the most economical way to improve efficiency and operating flexibility, Get substantial savings on your fuel costs,Reduce all emissions for each K/W of electricity generated, including CO2.
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Established:In 1945
Number of Employees:above 1500 People
Our products:industrial horizontal steam boiler and hot water boiler(biomass boiler, gas boiler, oil boiler, coal boiler, etc), CFB boiler, power plant boiler, waste heating recovery boiler, Pressure Vessel(AAC autoclave, Curing tank,etc )
Factory Size (Sq.meters):400,000 square meters
Factory Location:Factory 1: Zhengzhou,,Henan, China. Factory 2: Xingyang,Henan,China
Number of R&D Staff:376 people
Export Percentage:30-40%
Total Annual Sales Volume:US$100 Million
Main Market:South America(Colombia, Venezuela, Guyana, Suriname, Ecuador, Peru, Brazil, Bolivia, Chile, Paraguay, Uruguay, Argentina and French Guiana), North America(Bahamas, Canada, Costa Rica, Cuba, El Salvador, Guatemala, Honduras, Haiti, Jamaica, Mexico, Nicaragua, Panama), Eastern Asia(Mongolia / Russia / North Korea / South Korea / Japan), Oceania(Australia, New Zealand, Fiji), Mid East(Bahrain, Egypt, Iran, Iraq, Israel, Jordan, Kuwait, Lebanon, Oman, Qatar, Saudi Arabia, Syria, UAE and Yemen, Palestine, Algeria, Libya, Morocco, Tunisia and Sudan, Mauritania and Somalia), Africa(Egypt, Sudan, Libya, Tunisia, Algeria, Morocco, Ethiopia, Somalia, Kenya, Tanzania, Sierra Leone, Liberia, Cote d'Ivoire, Ghana, Togo, Niger, Nigeria, Cameroon, Gabon, Congo (Brazzaville), Zambia, Zimbabwe, Angola, Mozambique, Botswana, Namibia, South Africa), South Asia(Nepal, Bhutan, India, Pakistan, Bangladesh, Sri Lanka, Maldives) Southeast Asia(Vietnam, Laos, Cambodia, Thailand, Myanmar, Malaysia, Singapore, Indonesia, Brunei, the Philippines, East Timor) Domestic Market(China)
Source: http://www.zgsteamboiler.com/solution/High-Pressure-Boiler-75kgcm2-Water-Parameters-in-Sugar-Plant.html
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