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Repair and surface protection process of desulfuration recycle pump

A circulating pump and process technology, applied in the field of materials, can solve problems such as harsh operating conditions, corrosion and wear, pump casing cavitation, etc., and achieve the effects of improving operational safety, significant economic benefits, and prolonging service life

Active Publication Date: 2012-07-25
XIAN THERMAL POWER RES INST CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The circulating pump conveying medium is gypsum solid phase and high content of Cl - Such as corrosive slurry, the operating conditions are harsh, and the pump casing is prone to cavitation, corrosion and wear, which will lead to damage and failure of the desulfurization circulating pump, which will have a great impact on the long-term reliable operation of the pump and seriously threaten the safety and economy of the entire desulfurization system. Effectively repairing these defects is an important technical measure to ensure the safe and economical operation of the desulfurization system, and it is very urgent and necessary

Method used

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Embodiment Construction

[0026] Whole process of the present invention is as follows:

[0027] 1) Before the repair, use a direct-reading spectrometer to identify the pump casing material of the desulfurization circulating pump on site, test the mold line of the pump casing repair area, and make a mold line model according to the test data;

[0028] 2) Use macro inspection, magnetic particle inspection or penetrant inspection to check the distribution and size of abrasive defects;

[0029] 3) Use manual mechanical methods to clean up abrasive defects;

[0030] 4) Macroscopic inspection and re-inspection of non-destructive flaw detection to confirm that the defects in the area to be repaired have been completely eliminated;

[0031] 5) The V-shaped groove is prepared in the area to be repaired by mechanical means. The groove angle is related to the thickness of the surfacing cladding. The principle of groove preparation is easy welding operation and less filling.

[0032] 6) Before welding, the groov...

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PUM

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Abstract

The invention relates to a repair and surface protection process of a desulfuration recycle pump. By adopting the manual profile-modeling surfacing to repair pump case lines of the desulfuration recycle pump and adopting the hypersonic flame spraying to prepare an erosion resistant coating, the invention realizes the on-site repair and large-area protection of the pump case molded lines of the desulfuration recycle pump, can repair and protect the desulfuration recycle pump at high quality, improves the cavitation erosion resistance, the corrosion resistance and the abrasion resistance of thedevice, prolongs the service life of the desulfuration recycle pump, and improves the operation safety of the power station desulfuration system. Besides, the prepared erosion resistant coating has the advantages of high bonding strength, low porosity, obviously-improved rigidity compared with the basal body, uniform and compact coating and excellent erosion resistance, and can greatly prolong the service life of the desulfuration recycle pump.

Description

technical field [0001] The invention belongs to the technical field of materials, and relates to a repair and surface protection process of a desulfurization circulating pump. Background technique [0002] The desulfurization circulation pump is the key equipment in the limestone (lime) / gypsum wet desulfurization plant, known as "the heart of the plant operation", the pump is a large-scale equipment and expensive. Its function is to continuously provide slurry to the spraying device to realize the absorption and removal of SO in the flue gas in the absorption tower 2 . The circulating pump conveying medium is gypsum solid phase and high content of Cl - Such as corrosive slurry, the operating conditions are harsh, and the pump casing is prone to cavitation, corrosion and wear, which will lead to damage and failure of the desulfurization circulating pump, which will have a great impact on the long-term reliable operation of the pump and seriously threaten the safety and econ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B23P6/00
Inventor 李太江李巍姚兵印王彩侠刘立营王博
Owner XIAN THERMAL POWER RES INST CO LTD
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