Municipal sludge-coal water slurry co-fired organic working medium boiler

Abstract

The invention discloses a municipal sludge-coal water slurry co-fired organic working medium boiler which comprises an air distribution device, a combustion chamber, a vortex separation burnout device and a tail convection heating surface component, wherein the combustion chamber is divided into a dense-phase zone and a dilute-phase zone; the air distribution device is provided with an air distribution plate; vent holes are formed in the air distribution plate; the vent holes are sequentially arranged from the middle to the edge of the air distribution plate, and the areas of the vent holes are gradually reduced; the dense-phase zone is of an inverted landing-shaped structure, and a buried pipe is arranged in a return flow zone of the dense-phase zone; water cooling walls are arranged around the dilute-phase zone; the vortex separation burnout device is arranged at the upper part of the dilute-phase zone; the tail convection heating surface component is arranged at the rear part of the vortex separation burnout device; the organic working medium boiler adopts the municipal sludge-coal water slurry mixed fuel. According to the municipal sludge-coal water slurry co-fired organic working medium boiler disclosed by the invention, the application range of the municipal sludge is widened, and the use cost of the organic working medium boiler is lowered.

Description

technical field [0001] The invention relates to an industrial boiler, in particular to an organic working medium boiler for co-firing municipal sludge-coal water slurry. Background technique [0002] Currently commonly used water and wastewater treatment methods include physical, chemical, physicochemical and biological methods. No matter which method will produce more or less sediment, particulate matter and floating matter, etc., the resulting substances are collectively referred to as sludge. Sludge is a heterogeneous body composed of organic debris, bacteria, inorganic particles and colloids. It is difficult to carry out thorough solid-liquid separation by sedimentation. Municipal sludge mainly refers to sludge from sewage plants, which is the largest type of sludge. In addition, sludge from waterworks also comes from municipal facilities and can be included in this category. [0003] The existing municipal sludge treatment methods mainly include concentration, diges...

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Problems solved by technology

Traditional organic working fluid boilers that use coal-water slurry as fuel adopt atomization combustion. The main problems are: the central temperature of the high-temperature combustion flame is above 1450°C, and it is easy to coke in a small-space combustion chamber; the ignition conditions are poor and the combustion is not good. Stable; boiler coal type has poor adaptability, clean coal needs to be washed to make slurry, and the operating cost is high; the load adjustment range is small, and the combustion rate is easy to be low and greatly reduced at low load; it belongs to high-temperature combustion and high pollutant emissions; the boiler slurry supply system is complex and High operating pressure is likely to cause wear of the slurry pump and gun

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