Steam air preheating system and method for waste incineration industry

Abstract

The invention particularly relates to a steam air preheating system and method for the waste incineration industry. The steam air preheating system comprises a steam inlet pipeline, a heat exchanger,a drainage set and a drainage main pipe. The steam inlet pipeline is suitable for extracting steam in a steam pocket and / or a steam turbine and conveying the steam into the heat exchanger, after air absorbs steam heat from the heat exchanger, hot air is formed to be exhausted, and condensate water formed by condensing the steam in the heat exchanger flows through the drainage set and is recycled into a corresponding container through the drainage main pipe. The temperature of the condensate water obtained after steam heat exchange is reduced to 100 DEG C or below through the high-pressure supercooling technology, it is guaranteed that secondary flash evaporation steam is not generated when the pressure is reduced to be equal to the pressure of the corresponding container, corresponding pipelines and valve sets are prevented from being impacted, energy can be saved, and the consumption can be reduced; and the air temperature can ensure that the air is heated to be lower than the steam saturation temperature of 15-20 DEG C, a flash tank and a drainage valve needed by a traditional preheating system are omitted, and the stability is improved while the purchasing cost is reduced.

Description

Technical field [0001] The present invention belongs to the field of waste incineration, and in particular to a steam air preheating system for a waste incineration industry and a preheating method thereof. Background technique [0002] Waste incineration refers to the combustion of human social production and life, and a waste treatment method for reducing, harmless, and resource purposes. Waste incineration treatment technology reduces land resources due to its great reduction of land resources, and reduces pollution to groundwater and air, it can be widely adopted, and domestic waste incineration is the main way to handle domestic garbage, which has garbage decrease Quantitative, the transfer of waste is the characteristics of resources. The domestic waste incineration machinery furnace is used in incineration of domestic garbage, producing high temperature flue gas to power generation through the waste heat boiler and steam turbine generator. [0003] The steam air preheating...

AI Technical Summary

Problems solved by technology

The disadvantage is that it is equipped with a large number of auxiliary equipment, such as flash tanks, steam traps, etc.

Domestic steam traps have a high failure rate, and the drainage characteristics are difficult to adapt to the system working conditions. Imported steam traps are expensive and difficult to compare in performance, and a single air preheater needs to purchase 3 steam traps, which is expensive

At the same time, there is still secondary flashing in the pipeline behind the steam trap, causing water hammer in the pipeline, affecting equipment safety, low heat exchange efficiency, and wasting energy

Images