New patented low-pressure circulating fluidized bed steam boiler

NegotiableUpdate on 05/27

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Nature of the Manufacturer: Producers

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Overview

The patented new circulating fluidized bed boiler is a natural circulation circulating fluidized bed steam boiler. This product is a circulating fluidized bed boiler developed by the Zhengzhou Circulating Fluidized Bed Boiler Research Institute of Tsinghua University using the latest technological achievements of Tsinghua University. Due to the adoption of the latest advanced and mature circulating bed technology, boiler membrane wall heating surface structure, and longitudinal flushing structure of convection tube bundles, the overall boiler is more reliable, with simple and compact layout. The boiler body consists of a coal feeding device, combustion equipment, water cooling system, high-temperature cyclone separator, economizer, steel frame, escalator, furnace wall, etc. The adaptability of boiler coal types is wide. Not only can smokeless coal, bituminous coal, lignite, and lean coal be used, but also inferior fuels such as coal gangue, gasification slag, and chain slag can be used. Waste slag can be comprehensively utilized, and the carbon content of slag is generally below 2%. Due to the use of low-temperature combustion technology, this product effectively reduces the generation of harmful gases, and NOx emissions can meet the requirements of GB13271 emission standard 200mg/m3 without the use of denitrification equipment.

Product Details

Product Introduction

Design parameters

The patented new circulating fluidized bed boiler is a natural circulation circulating fluidized bed steam boiler. This product is a patent only belonging to Zhengzhou Zhongding Co., Ltd. examined and established by the China National Intellectual Property Administration in accordance with the Patent Law of the People's Republic of China. Patent number ZL2012 2 0333591

1. The boiler adoptsAll steel floor standing structureGreatly saves investment in boiler foundation construction. The boiler is equipped withVery low thermal inertia,The boost gas supply time is fast.2Hanging membrane fireplace chamberAdopting a fully membrane wall lightweight attached tube furnace wall structure that is reliable in avoidance, tightly sealed, and has the best heat transfer effect.3Supported lower fluidized bedAdopting a fully steel shell medium-sized furnace wall structure with tight sealing and simple structure.4. The upper furnace and lower fluidized bed are reliably connected and sealed using an expansion and contraction structure.5Heat resistant alloy cast steel cylindrical embedded counterflow hoodNo dust leakage, uniform air distribution, long service life.

6. The most reliable and matureDouble cyclone adiabatic separatorcoordinateMembrane wall water-cooled ceilingAnd withMembrane wall water-cooled ceilingTurn towards the smoke chamber structure.7. Efficient and mature dual U-shaped return valve structure.

1. The mature furnace and separator structure ensures the efficient and normal operation of the boiler.
2. The water-cooled membrane fireplace chamber and membrane wall convection tube bundle structure achieve optimal sealing and lightweight insulation structure.
3. The top of the water-cooled membrane wall separator and the water-cooled membrane wall turning smoke chamber structure completely solve the problems of air leakage, collapse, and damage at the top of the circulating fluidized bed boiler separator. The reliability of the boiler has been comprehensively improved.
4. The amount of refractory materials used in the boiler has been significantly reduced by 50%, thereby reducing the thermal inertia of the boiler and greatly reducing the time for boiler start-up pressure boosting and gas supply.
5. The boiler occupies a small area and is easier to arrange.

Structural characteristics

1. Water cooled membrane wall hanging furnace and wear-resistant avoidance structure in dense and dilute phase zones.
2. Water cooled membrane wall separator top.
3. Water cooled membrane wall turning smoke chamber structure.
4. Efficient all steel high-temperature cyclone insulated separator.
5. A convection tube bundle structure enclosed by a lightweight furnace wall with full membrane walls around the double drum.

Performance characteristics