Integrated device for sludge drying and flue gas dust removal for coal-fired power plants

Abstract

The invention provides a sludge drying and smoke dust-removing integrated device for a coal-fired power plant. The sludge drying and smoke dust-removing integrated device comprises a bent pipe (1) with a horizontal section and a vertical section, wherein the inlet of the horizontal section of the bent pipe is connected with a smoke discharging pipe (2) of the coal-fired power plant and an exit at the lower end of the vertical section is connected with a smoke purification pipeline; the horizontal section of the bent pipe is sleeved with a pipe-shaped sludge drying cavity (3) and a gap is formed between the horizontal section of the bent pipe and the pipe-shaped sludge drying cavity; a hollow shaft spiral feeder (4) which can rotate along the axis of the horizontal section of the bent pipe is clamped in the gap; a semi-dried sludge inlet is formed in the upper end of the front part of the pipe-shaped sludge drying cavity and a dried sludge outlet is formed in the lower end of the back part of the pipe-shaped sludge drying cavity; the dried sludge outlet is provided with an inclined pipe (5) to be communicated with the middle part of the vertical section of the bent pipe; smoke purification ribs (6) are arranged in the pipe on the lower part of the vertical section of the bent pipe and are a plurality of rows of trapezoid-shaped steel sheets which are crossed along the axial direction and stretch out inwards from the horizontal direction of the pipe wall. According to the sludge drying and smoke dust-removing integrated device, the NOX content of smoke is reduced by about 3% and the SO2 content is reduced by about 5%.

Description

technical field [0001] The invention relates to a method for drying the semi-dried sludge through the waste heat of the flue gas of a coal-fired power plant, and then purifying the flue gas with the dried sludge, which is used for the integration of sludge drying and flue gas dust removal in a coal-fired power plant device. Background technique [0002] The amount of sewage treatment in our country is increasing day by day, and the sludge produced by sewage treatment is also increasing day by day. At the same time, my country's current sludge treatment technology and equipment are generally backward, and the low capacity for safe sludge treatment has become an urgent problem that our country is currently facing. If it is not handled properly or not in time, it will cause serious secondary pollution. Incineration treatment is one of the most effective methods at present. Incineration can fully carbonize organic matter, kill pathogens, and minimize sludge volume. In 1962, ...

AI Technical Summary

Problems solved by technology

At present, the domestic sludge pretreatment technology is limited to drying and sterilization, but the use of sludge is relatively small, such as the use of dried sludge as a fuel; as an adsorbent; as a fertilizer; as a building material use, etc., many technologies are currently in the research and development stage, not mature enough

[0005] No integrated device for sludge drying and flue gas dust removal in coal-fired power plants has been found so far

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