China Pressurized Circulating Fluidized Bed Combustion (PCFBC)

Summary:FBC in pressurized boilers can be undertaken in compact units, and can be potentially useful for low grade coals and those with variable characteristics. As with atmospheric FBC, two formats are possible, one with bubbling beds, the other with a circulating configuration. Currently commercial-scale operating units all use bubbling beds, and hence the acronym PFBC is normally used in the literature to refer to pressurized bubbling bed units.

10-06-2015

FBC in CFB boilers can be particularly useful for high ash coals, and/or those with variable characteristics although PFBC has also been used on a commercial scale in Sweden and Japan with traded coals of higher quality. It is used with a combined-cycle system incorporating both steam and gas turbines. Considerable effort has been devoted to the development of PFBC during the 1990s.

CFB boilers manufacturer

FBC in pressurized boilers can be undertaken in compact units, and can be potentially useful for low grade coals and those with variable characteristics. As with atmospheric FBC, two formats are possible, one with bubbling beds, the other with a circulating configuration. Currently commercial-scale operating units all use bubbling beds, and hence the acronym PFBC is normally used in the literature to refer to pressurized bubbling bed units. A pressurized circulating fluidized bed combustion (PCFBC) demonstration unit was planned, and there have been a number of pilot-scale investigations. It has possible advantages, in terms of reductions in unit size, but the work is currently at pilot scale. The demonstration plant was cancelled as no suitable gas turbine was available.

Characteristics

As with PFBC using bubbling beds, the combustor and cyclones are held inside a pressure vessel. The pressure used is 1-1.5 MPa with combustion temperatures of 800-900°C. vessel. Both coal and sorbent have to be fed across the pressure boundary, and similar provision for ash removal is necessary. For hard coal applications, the coal and limestone can be crushed together, and then fed as a paste, with 25% water. As with atmospheric FBC (CFBC or BFBC), the combustion temperature between 800-900°C has the advantage that NOx formation is less than in PCC, but N2O is higher. SO2 emissions can be reduced by the injection of a sorbent, and its subsequent removal with the ash. Hot gas filtration may be necessary before the flue gases are fed to the turbine, and this is an area of technology under development. Approximately 15% of the power produced will come from the gas turbine and 85% from the steam turbine. Generation by the combined cycle route involves unique control considerations, as the combustor and gas turbine have to be properly matched through the whole operating range.
Flue gas cleaning/emissions

Combustion takes place at temperatures from 800-900°C resulting in reduced NOx formation compared with PCC. N2O formation is, however, increased. SO2 emissions can be reduced by the injection of sorbent into the bed, and the subsequent removal of ash together with reacted sorbent. Limestone or dolomite are commonly used for this purpose.
As indicated above, hot gas filtration may be needed before the flue gases are passed through the turbine.

Residues

The residues consist of the original mineral matter, most of which does not melt at the combustion temperatures used. Where sorbent is added for SO2 removal, there will be additional CaO/MgO, CaSO4 and CaCO3 present. There may be a high free lime content and leachates will be strongly alkaline. Carbon-in-ash levels are higher in FBC residues that in those from PCC.

 

Circulating fluidised bed Boiler Cases

Cases about China Pressurized Circulating Fluidized Bed Combustion (PCFBC)

ZG Boiler Workshop

Factory about China Pressurized Circulating Fluidized Bed Combustion (PCFBC) supplier

Why choose ZG Boiler as China Pressurized Circulating Fluidized Bed Combustion (PCFBC) manufacturer

We have over 70 years' experience of 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.

How about the quality of China Pressurized Circulating Fluidized Bed Combustion (PCFBC) ?

About China Pressurized Circulating Fluidized Bed Combustion (PCFBC) Certificate picture

Our China Pressurized Circulating Fluidized Bed Combustion (PCFBC) manufactured strictly according to national and international standard. our products have approved ASME, IBR, ISO9001-2008, etc

All our company's products are 100% factory inspected to ensure the high quality.

We provide one year quality warranty service, please rest assured purchase.

About China Pressurized Circulating Fluidized Bed Combustion (PCFBC) company picture

Basic Information of CFB Boiler manufacturer--- ZG Boiler

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

Our Trade & Market

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)

Pre product: Fluid bed combustion boilers manufacturer

Next product: Circulating fluidized bed combustion for biomass boiler

Related products

Inquiry Products
Contact us

Email:[email protected]

Skype:zgboiler123

Telephone:0086-371-86678488

Address: NO.88 Science Road,High and New Technology Development District,Zhengzhou,China

Solution

New project

Biomass CFB Boiler Plant in Bahamas

In Bahamas, the biomass can be burned using conventional combustion technology like grate furnace or fluidized bed boilers. For power generation the biomass would be charged to the furnace of a steam boiler.Steam produces by the boiler will then drive a steam turbine generator to generate electricity. The typical capacity range for biomass power plants 1-20MW.

ZG Boiler Profiles
strenght image

Zhengzhou Boiler Co., Ltd (ZG Group), founded in 1945, is a joint-stock enterprise with A Grade Boiler design and manufacture license permits. Over 60 years' experience in Boiler design and manufacturing has rewarded us with an industrial boiler(circulating fluidized bed boiler, oil & gas fired boiler, chain grate boiler, waste heat boiler).

Back to top