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Anti-corrosion arrangement method for water cooling wall of waste incineration waste heat boiler

A waste heat boiler and waste incineration technology, which is applied to boiler water pipes, steam generation methods using heat carriers, steam boilers, etc., can solve the problems of increased corrosion risk of high-temperature heating surfaces, and achieve the effect of avoiding high-temperature corrosion

Pending Publication Date: 2020-05-29
SHANGHAI BOILER WORKS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The selection of the main steam temperature is mainly limited by the increase of the temperature, which directly causes the corrosion risk of the high temperature heating surface to increase

Method used

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  • Anti-corrosion arrangement method for water cooling wall of waste incineration waste heat boiler

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] figure 1 Area Ⅰ (that is, the area below the smokestack 5 of the flue 1 exit in flue 1), area Ⅱ (that is, the area above 5 of the flue 1 exit chimney in flue 1), area Ⅲ (that is, the area of ​​flue 2 2 The water-cooled heating surface of the water-cooled wall structure located in the area above the flue-exit chimney 5), area V (that is, the ash hopper 4 area) is refractory pouring. figure 1 The water-cooled heating surface of the water-cooled wall structure in area IV (that is, the straight section of flue two 2) and area VI (that is, flue three 3) is surfacing.

Embodiment 2

[0021] figure 1 In the area I, area II, area III, and area V, the water-cooled heating surface of the water-cooled wall structure is cast refractory. Considering that the pouring in the roof area is easy to fall off, the area II and area III are surfacing first, and then refractory pouring is performed on the basis of the surfacing layer, which can further prolong the service life of the flue 1 and flue 2 ceiling pipes. Simultaneously figure 1 The surfacing welding of the water-cooled heating surface of the water-cooled wall structure in area IV and area VI.

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Abstract

The invention relates to an anti-corrosion arrangement structure of a water cooling wall of a waste incineration waste heat boiler. The anti-corrosion arrangement structure includes a flue I, a flue II and a flue III sequentially arranged in the flue gas flowing direction, wherein the flue I, the flue II and the flue III all adopt a water cooling wall structure, the bottoms of the flue II and theflue III communicate with an ash hopper, the flue I is provide with a flue I outlet smokestack, and the flue II is provide with a flue II outlet smokestack. The anti-corrosion arrangement structure ischaracterized in that a refractory pouring layer I is arranged on the water cooling heated surface of the water cooling wall structure of the flue I, a refractory pouring layer II is arranged at theposition, located in the upper area of the flue I outlet smokestack, of the water cooling heated surface of the water cooling wall structure of flue II, and a refractory pouring layer III are arrangedon the water cooling heated surface of the water cooling wall structure of the ash hopper; and a surfacing layer I is arranged on the water cooling heated surface of the water cooling wall structureof the vertical section of the flue II, and a surfacing layer III is arranged on the water cooling heated surface of the water cooling wall structure of the flue III. The anti-corrosion arrangement structure aims at a higher saturation temperature of the water cooling wall, and the occurrence of serious high-temperature corrosion is avoided through a reasonable water cooling heated surface refractory laying scheme.

Description

technical field [0001] The invention relates to an anti-corrosion arrangement structure of a water wall of a waste heat waste heat boiler. Background technique [0002] Garbage fuel fluctuates greatly, and the combustion process, flue gas composition, flue gas volume and flue temperature fluctuate greatly; the composition of incinerator flue gas is complex, including chlorides, alkali metals and heavy metals, etc.; the content of solid substances with low melting points in flue gas dust is high. The steam parameters of existing waste incinerators are kept relatively low due to the high concentration of chemical elements and high temperature, which makes the tube bundles on the hot side easy to corrode. [0003] Due to the complex flue gas atmosphere in the water wall area, the temperature of the outer wall of the pipe on the fire side is higher in the area with higher smoke temperature, the pressure of the main steam increases, the pressure of the steam drum and the water wa...

Claims

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Application Information

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IPC IPC(8): F22B37/10F22B1/18F23J15/06
CPCF22B1/18F22B37/107F23J15/06Y02E20/30
Inventor 辛少杰郭琴琴袁玉洁鲍治中王哲江
Owner SHANGHAI BOILER WORKS
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