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Analysis of biomass co firing boiler technology

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The Impacts of Biomass Co-firing boiler technology on the Environmental Performance of the Boiler In all cases, the commercial co-firing of biomass in power plants in Britain and elsewhere is commonly preceded by the performance of trials during which the key environmental performance parameters of the boiler plant, when co-firing, are measured. If there are significant additional environmental impacts, the authorization from the environmental regulator required for commercial co-firing may be withheld. The general experience from the environmental monitoring testwork carried out to date on boiler plants co-firing biomass at co-firing ratios up to around 10% on a heat input basis, can be summarized as follows:

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Analysis of biomass co firing boiler technology

  1. 1. ZHENGZHOU BOILER CO.,LTD High and New Technology Development Zone, Zhengzhou,China www.zghorizontalboiler.com ; www.zgsteamboiler.com Email: industrialboilermerry@hotmail.com ;merryzzboiler@gmail.com ZHENGZHOU BOILER CO.,LTD industrialboilermerry@hotmail.com Analysis of Biomass Co-firing Boiler Technology The Impacts of Biomass Co-firing boiler technology on the Environmental Performance of the Boiler In all cases, the commercial co-firing of biomass in power plants in Britain and elsewhere is commonly preceded by the performance of trials during which the key environmental performance parameters of the boiler plant, when co-firing, are measured. If there are significant additional environmental impacts, the authorization from the environmental regulator required for commercial co-firing may be withheld. The general experience from the environmental monitoring testwork carried out to date on boiler plants co-firing biomass at co-firing ratios up to around 10% on a heat input basis, can be summarized as follows: 1. As stated above, there has been very little negative impact on the combustion conditions or the combustion efficiency, i.e. on flame stability, burner turndown capabilities, the unburned carbon levels in the ash discards or on the emission levels of CO and the other organic pollutants, i.e. VOCs, PAHs and dioxins/furans. 2. The measured NOx emission levels when co-firing biomass have been similar to, or a few percent lower than, those measured when firing coal. 3. The total dust and trace element emission levels have been similar to those when firing coal, 4. The SO2 emission levels have been similar to or lower than those when firing coal, in line with the co-firing ratio and the sulphur contents of the fuels. 5. There have been no significant problems with the quality of the ash discards, or on ash sales or disposal. Overall, it is clear that there has been little or no evidence of any significant environmental impacts associated with the co-firing of biomass at co-firing ratios less than 10% on a heat input basis. The only significant environmental concerns have been associated with the generation of fugitive dust emissions from the biomass storage and handling facilities and, in some cases, the smell from the biomass reception and handling activities, when processing materials which have a distinctive smell. Biomass co-firing developing : Overall, it is clear from the material presented in this article that there has been very rapid development of biomass co-firing capability within the British electricity supply industry, in response to the introduction of the Renewable Obligation in April 2002. All of the large coal-fired power plants have been co-firing biomass, principally by pre-mixing the biomass with the coal and co-milling. Over the past two years, a number of operators have embarked on significant capital investment projects, aimed at increasing their biomass co-firing capabilities to levels above those that are achievable using the pre-mixing and co-milling route. This also applies in a number of other European countries. It is anticipated that the biomass co-firing activities in Britain and Europe will continue to expand over the next few years.
  2. 2. ZHENGZHOU BOILER CO.,LTD High and New Technology Development Zone, Zhengzhou,China www.zghorizontalboiler.com ; www.zgsteamboiler.com Email: industrialboilermerry@hotmail.com ;merryzzboiler@gmail.com ZHENGZHOU BOILER CO.,LTD industrialboilermerry@hotmail.com It is clear, however, that the scope for the expansion of co-firing activities will depend on the government policies, and the effectiveness of the policy instruments put in place to encourage CO2 emission reductions from the electricity supply industry and the generation of renewable energies. The availability of suitable biomass materials for co-firing may also continue to represent a constraint on co-firing activities. This is important because biomass materials are, and are likely to continue to be in the short-medium term future, a relative scarce and expensive energy source compared to fossil fuels. In those countries where coal will continue to be a significant portion of the fuel mix for power generation, co-firing has a key role to play in the helping to meet the challenges represented by global warming, and the imperative to develop the means of progressively reducing fossil fuel utilization. Overall, the principal driver for the increasing demand for the capability to co-fire biomass materials in new and existing coal boiler plants is that co-firing is regarded as representing a very attractive option for biomass utilization, and for the delivery of renewable energy, in terms of the capital investment requirement, security of supply, power generation efficiency and generation cost. This is recognized, for instance, by IEA Bioenergy (2006), in the EC Biomass Action Plan (2005), and by a number of EC member state and other governments, who have introduced specific financial instruments to encourage biomass utilization, in general, and co-firing activities at existing and future coal-fired power plants. For a number of the new build coal-fired power plant project under consideration in Europe and elsewhere, the demand is for advanced co-firing systems capable of operation at elevated co-firing ratios, i.e. at up to 25% or even 50% on a heat input basis. The likelihood is that these will be based on direct injection co-firing systems, or perhaps on indirect or parallel co-firing systems. To a first approximation, the maximum acceptable co-firing ratio in any given application will be dependent on the details of the coal and biomass specifications, and in particular the ash contents and ash qualities, and the total sulphur and chlorine contents, since the potential impacts on boiler plant performance associated with biomass co-firing are largely ash-related. The potential impacts are illustrated in the article, using the co-firing of wood pellets and olive residues with a high quality, world-traded coal as an example. It is clear that co-firing at elevated co-firing ratios, i.e. up to 50% on a heat input basis, will tend to be limited to the higher grade biomass materials with low ash contents and low chlorine contents. On the other hand, there will also be an increasing demand, for fuel availability and cost reasons, for co-firing systems that can provide increased fuel flexibility. The development of the appropriate responses to these potentially conflicting demands will represent a significant challenge to the power plant operators and to the technology providers for some time to come.
  3. 3. ZHENGZHOU BOILER CO.,LTD High and New Technology Development Zone, Zhengzhou,China www.zghorizontalboiler.com ; www.zgsteamboiler.com Email: industrialboilermerry@hotmail.com ;merryzzboiler@gmail.com ZHENGZHOU BOILER CO.,LTD industrialboilermerry@hotmail.com Industrial Boiler Company Introduction: Zhengzhou Boiler CO., Ltd is a leading industrial horizontal boiler manufacturer and exporter in Henan Province, China, founded in 1945, is a joint-stock enterprise with A1, A2, C3 pressure vessel design and manufacture license permits. We are specialized in the producing of horizontal Gas fired boiler,horizontal oil fired boiler, horizontal Biomass fired boiler,horizontal Coal fired boiler,horizontal Chain grate boiler,CFB boiler,Waste heat recovery boiler,Industrial autoclave,AAC block plant. The industrial boiler and autoclaves are developed with technical advantages, stable and reliable performance, exported to Southeast Asia, Africa, Middle East and other countries. As the company continues to grow, many honors have followed us. Now the company has covered an area of 20,000 square meters, with more than 1500 employees and more than 1000 various types of manufacturing equipment, and ten large research bases. The main products are: 1. WNS series gas & oil horizontal steam boiler 1-20 ton/hour, hot water boiler 0.7-14MW 2. SZL series chain grate boiler: 4 ~ 35 T/h steam boiler, 1.4 ~ 14 MW hot water boiler; 3. DZL series chain grate boiler: 2 ~ 35 T/H steam boiler, 2.8~ 17.5 MW hot water boiler; 4. CFB boiler(power plant boiler) is 10-280 ton 5. Biomass boiler: 2 ~ 25 T/H steam boiler, 2.8~ 17.5 MW hot water boiler; 6. AAC block plant : 50000-250000m3 we try our best to be number one, and always put the quality at the first place. Depending on the efforts of the staff, we have been identified by many famous international certifications: ISO,ASME,IBR. They are the ISO9001 Quality Management System Certification in 1999, Quality Management System Certification by IQNET and IQM in 2002, and boiler and pressure Vessel certification by ASME in the September of 2008.
  4. 4. ZHENGZHOU BOILER CO.,LTD High and New Technology Development Zone, Zhengzhou,China www.zghorizontalboiler.com ; www.zgsteamboiler.com Email: industrialboilermerry@hotmail.com ;merryzzboiler@gmail.com ZHENGZHOU BOILER CO.,LTD industrialboilermerry@hotmail.com Our strong financial and technical support , and its own R & D and innovation are the guarantee of providing customers with pretty good products and services . To meet the requirement of national low-carbon, environmentally friendly, and energy-saving , our study team has invented a series of autoclave and ancillary products with excellent design, high performance and excellent quality. We have 102 sales office in domestic cities which enjoyed a good reputation, and constantly exported to Southeast Asia, Central Asia , Europe and other countries and regions . Also our products have been awarded as the "Wall Materials and Production Equipment Recommended Products " by the wall materials industry Association . Our products are widely used in new building materials, cement pipe, pharmaceutical and medical device manufacturing, aerospace and food industries. Web:www.zghorizontalboiler.com www.zgsteamboiler.com

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