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Spraying material for heating surface of boiler tube of garbage incinerator and construction process thereof

A waste incinerator and spraying material technology, which is applied in the direction of metal material coating process, coating, molten spraying, etc., can solve the problems of tube wall wear, affect the service life of boiler equipment, reduce the service life of boilers, etc., and reduce wear , improve resistance, and reduce the number of "pipe burst" effects

Inactive Publication Date: 2020-02-21
常熟浦发第二热电能源有限公司
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  • Claims
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Problems solved by technology

Seriously affect the service life of the boiler equipment. In addition, there may be hard particles such as quartz sand in the waste incinerator. Driven by high-temperature flue gas, they hit the tube wall of the heating surface of the boiler at high speed, which will further cause the tube wall to wear. reduce boiler life

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  • Spraying material for heating surface of boiler tube of garbage incinerator and construction process thereof
  • Spraying material for heating surface of boiler tube of garbage incinerator and construction process thereof
  • Spraying material for heating surface of boiler tube of garbage incinerator and construction process thereof

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Embodiment Construction

[0013] The preferred embodiments of the present invention are described in detail below, so that the advantages and features of the present invention can be more easily understood by those skilled in the art, so as to define the protection scope of the present invention more clearly.

[0014] Embodiments of the present invention include the following:

[0015] First of all, analyzing the incineration products of the waste incinerator, it can be found that the main incineration products of the waste incinerator can be divided into two types: hard cement slagging and powder fly ash. The surface of the former is mostly green and extremely hard; the latter Green or red. It can be seen from the elemental analysis table of waste incineration products in Table 1 that the hard bonded products are mainly oxides composed of Ca, Si, Fe and other elements (O element is not in the detection range), thus reflecting extremely hard appearance characteristics ; In addition, a small amount of ...

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Abstract

The invention discloses a spraying material for a heating surface of a boiler tube of a garbage incinerator and a construction process thereof. The spraying material for the heating surface of the boiler tube of the garbage incinerator is an alloy material, with resistance to corrosion and resistance to scouring, designed for analysis of corrosion components of garbage. The alloy material is prepared by adding Mo and W hard phase elements based on a NiCr alloy base material. The NiCrMoW alloy is coated on the tube wall of the boiler tube by way of high speed electric arc spraying. In this way,the NiCrMoW alloy with high hardness and high resistance to corrosion can be sprayed to the heating surface of the boiler tube, the porosity of a coating is not greater than 1.5%, and the coating hasrelatively high stability.

Description

technical field [0001] The invention relates to the field of boiler tube surface treatment, in particular to a spray coating material for the heating surface of a boiler tube of a garbage incinerator and a construction process thereof. Background technique [0002] Due to high temperature, high pressure, corrosion, wear and fatigue, etc., the early burst of "four tubes" in power plant boilers is on the rise year by year, among which corrosion is one of the most important factors. According to the survey, due to corrosion and erosion of the boiler tube wall thinning of the units above 100 MW in my country, the downtime and emergency repair time caused by the explosion and leakage accident of the "four tubes" of the boiler accounted for about 40% of the unplanned outage time of the entire unit. More than 70% of the unplanned outage time of the boiler equipment itself. Sudden tube burst accidents of boilers are very harmful to the safety and stable power generation of power pla...

Claims

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Application Information

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IPC IPC(8): C23C4/131C23C4/08C23C4/02C23C4/18C22C19/05
CPCC22C19/056C23C4/02C23C4/08C23C4/18C23C4/131
Inventor 阮新宇高志君胡晓峰
Owner 常熟浦发第二热电能源有限公司
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