SHX series circulating fuidized bed(CFB) steam boiler introduction

SHX series of low-rate circulating fluidized bed boilers developed by our company have absorbed the latest scientific research and development achievements of the world extensively. The advantages of CFB boilers at home and abroad are gathered. The structure is more scientific and reasonable, and the combustion mechanism is further improved. It not only keeps the high efficiency, energy saving and ring of medium-high-rate circulating fluidized bed boilers. In addition, it effectively solves the problems of partial sequel blockage, complex control system and fly ash abrasion, thus lowering the operation and maintenance costs of the equipment to the greatest extent.

The boiler has a saturated steam boiler and a superheated steam boiler. The saturated steam boiler can be used for industrial and mining enterprises to produce steam and domestic heating. The superheated steam boiler can be used with 5MW steam turbine generator set.

Working principle

The bed temperature of SHX series circulating fluidized bed boilers is controlled between 850 ~950 ℃ during normal operation. According to the characteristics of coal combustion, limestone powder is added to the boiler as desulfurizer to remove SO 2 produced during combustion. The desulfurization efficiency of limestone powder is high in the range of 850 950 ℃, so circulating fluidization is necessary. High desulfurization efficiency can be achieved by burning at 850 ~950

SHX series circulating fluidized bed boilers are the fourth generation internal circulating fluidized bed steam boilers developed by Zozen Boiler. They are inferior fuels such as combustible anthracite, lean coal, bituminous coal, gangue, chain slag, gasification slag and sulfur-containing highland fuels, and can meet the requirements of environmental protection. The separator adopts the diaphragm wall to form the separator skeleton, and the structure is stable. The combustion device adopts a wind cap and a porous form to ensure uniform distribution of air and uniform and stable fluidization quality. By adding limestone to the furnace, it can significantly reduce the corrosion of sulfur to the equipment and meet the environmental protection requirements.

At the same time, SHX series circulating fluidized bed boiler can effectively suppress the generation of heat-reactive NOx at 850 ° C ~ 950 ° C combustion temperature, and adopts the staged combustion method to send secondary air, which effectively controls the fuel type. The generation of NOx. The emission of NOx is generally below 200m g/Nm 3 .

Product Advantage

1. Fuel adaptability, can meet the combustion of a variety of fuels.

2. The degree of automation is high, which can keep the boiler safe and economical for a long time.

3. The boiler combustion efficiency is as high as 95%~99%, the fuel utilization rate is high, the boiler thermal efficiency is up to 90%, energy saving and high efficiency.

4. The upper exhaust high-temperature cyclone separation device is adopted, the collection rate of the bed material is high, the heat transfer coefficient of the furnace is high, and the overload capacity is strong.

5. The boiler load adjustment range is large and can be adjusted within the range of 110%~30%, which is especially suitable for occasions where the boiler load fluctuation range is large.

6. Limestone can be added to the bed material. During the combustion process, it reacts with SO2 in the flue gas to form sulfate. The desulfurization effect satisfies the environmental protection requirements. At the same time, the furnace combustion temperature is low, which can inhibit the generation and emission of NOX.

Technical data