Pulverized coal and exhaust gas hybrid power double-medium boiler

Abstract

The invention discloses a pulverized coal and exhaust gas hybrid power double-medium boiler. The pulverized coal and exhaust gas hybrid power double-medium boiler comprises a fuel system, a stable combustion chamber, a combustion chamber, a complete combustion chamber, an upper boiler cylinder, a lower boiler cylinder, a heat conduction oil circulation system and a water circulation system and further comprises a stable combustion chamber adjusting device. The fuel system is arranged in front of the stable combustion chamber and provides fuel for the stable combustion chamber; the fuel system comprises a powder feeding system and an exhaust gas control system; a hearth is arranged between the upper boiler cylinder and the lower boiler cylinder; and the combustion chamber and the complete combustion chamber are arranged in the hearth. The combustion chamber communicates with the stable combustion chamber and the complete combustion chamber; the heat conduction oil circulation system is arranged in the complete combustion chamber; the stable combustion chamber is adjustable and comprises a movable stable combustion chamber body and a fixed stable combustion chamber body which are mutually connected in a sleeved mode; and the movable stable combustion chamber body moves in the front-rear direction along the fixed stable combustion chamber body under driving of the stable combustion chamber adjusting device. The stable combustion chamber is adjustable, thus the adaptability of the fuel is improved, and meanwhile the modes of double-medium independent cycle and sharing of a combustion system are adopted, so that the whole structure of the boiler is more compact, and the occupied area is reduced.

Description

technical field [0001] The invention belongs to the technical field of boilers, in particular to a pulverized coal and exhaust gas mixed dual-power dual-medium boiler. Background technique [0002] Pulverized coal combustion is one of the efficient and clean combustion methods of coal, and its combustion efficiency can reach more than 96%. It is a mature combustion technology and is widely used in large-scale power plant boilers. In recent years, pulverized coal combustion has also been applied in industrial boilers. [0003] The pulverized coal industrial boilers currently in operation mainly include steam boilers and organic heat carrier boilers. Among them, steam boilers are mainly of horizontal internal combustion shell structure and D-type double drum water tube structure, and organic heat carrier boilers are of horizontal type Coil-based, both steam boilers and organic heat carrier boilers can only provide users with a single medium, so there are the following deficie...

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Problems solved by technology

[0004] (1) The load adjustment range is small, and only a single medium (steam or organic heat carrier) can be provided;

[0005] (2) The combustion is not uniform enough, and the furnace temperature is high, which is not conducive to reducing the content of NOX;

[0006] (3) It is inconvenient to clean up boiler ash and slag;

[0007] (4) The boiler room covers a large area, and the operation management and investment of the enterprise have increased significantly

Although the above-mentioned pulverized coal boiler can realize "one furnace with two functions" and provide users with two media of steam and organic heat carrier at the same time, the two circulation systems share the combustion system, and the pure pulverized coal combustion is not enough to provide sufficient heat source. The amount of coal is large, and the coal ash and cinder have also increased significantly, which greatly increases the cost of the enterprise

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