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Full-repairing technology for housing of desulphurization circulating pump

A circulating pump and pump casing technology, which is applied in the full repair process of desulfurization circulating pump pump casings, can solve problems such as equipment outage, affecting desulfurization efficiency, and increased gap between pump port rings, etc., to achieve improved adhesion and repair process Simple, well-controlled effects

Inactive Publication Date: 2015-08-26
XIANGTAN JIEXI ENVIRONMENT TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] 1. The pits and roughness on the surface of the impeller, pump casing and other parts increase the resistance during flow;
[0004] 2. The wear of the impeller and the pump casing causes the gap between the pump port ring to increase and the loss of the pump to increase;
[0005] 3. Leakage of the pump casing affects on-site civilized production, and in severe cases causes equipment shutdown, affecting desulfurization efficiency;
[0006] 4. When a circulating pump fails and stops operating, the combined operation mode of other cycles changes, which affects the economy of the unit

Method used

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  • Full-repairing technology for housing of desulphurization circulating pump

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] The whole repair process of the pump casing of the desulfurization circulating pump of the present invention comprises the following steps:

[0026] (1) According to the degree of wear and corrosion of the pump casing of the circulating pump, combined with the drawing size of the pump, the welded skeleton treatment is performed on the worn and corroded pump casing;

[0027] (2) Sand blast the flow surface of the pump body and the welded skeleton to completely remove the rust and impurities on the flow surface and corrosion pits, and control the roughness after sandblasting to about 10 μm;

[0028] (3) Isolate the whole pump, and carry out chemical cleaning at room temperature under windproof and dustproof conditions;

[0029] (4) On-site preparation of anti-wear and anti-corrosion materials: mix the Loctite small particle protective agent and the supporting curing agent at a mass ratio of 3:1, and use the cast-pile stirring method to continue stirring for 12 minutes unt...

Embodiment 2

[0033] The whole repair process of the pump casing of the desulfurization circulating pump of the present invention comprises the following steps:

[0034] (1) According to the degree of wear and corrosion of the pump casing of the circulating pump, combined with the drawing size of the pump, the welded skeleton treatment is performed on the worn and corroded pump casing;

[0035] (2) Sand blast the flow surface of the pump body and the welded skeleton to completely remove the rust and impurities on the flow surface and corrosion pits, and control the roughness after sandblasting to about 30 μm;

[0036] (3) Isolate the whole pump, and carry out chemical cleaning at room temperature under windproof and dustproof conditions;

[0037] (4) On-site preparation of anti-wear and anti-corrosion materials: mix the Loctite small particle protective agent and the supporting curing agent at a mass ratio of 3:1, and use the cast-pile stirring method to continue stirring for 15 minutes unt...

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Abstract

The invention discloses a full-repairing technology for a housing of a desulphurization circulating pump. The full-repairing technology comprises the following steps: performing welding framework processing on a worn and corroded pump housing; performing sand-blast machining on a pump body flow-passing surface and a welding framework; performing chemical cleaning under the conditions of wind prevention, dust prevention, and room temperature or normal temperature; polishing the circulating pump, and then coating the circulating pump with an abrasion-resistant and anti-corrosive material and the like. According to the full-repairing technology provided by the invention, after being repaired by adopting the full-repairing technology, the circulating pump can be continuously operated for 4000 hours or more, the housing of the circulating pump repaired by adopting the technology is intact integrally and an abrasion-resistant and anti-corrosive layer is prevented from peeling, cracking and the like, parts, easy to abrade, at an impeller ring, an impeller outlet and the like are free of obvious abrasion traces, the effect superior than expected effect is achieved, the service life of the pump housing is preliminarily estimated to be more than two years. The repairing technology is simple, and excellent in controllability.

Description

technical field [0001] The invention relates to a desulfurization device, in particular to a complete repair process for a desulfurization circulation pump casing. Background technique [0002] The desulfurization circulating pump in the limestone (lime) / gypsum wet flue gas desulfurization system device is called "the heart of the desulfurization device". Severe cavitation, wear and corrosion appear in the pump casing, impeller and other parts of the circulating pump, which affect the service life and desulfurization efficiency of the circulating pump. At the same time, the slurry circulation pump is a large energy consumer of the desulfurization system. A slurry pump with a power of 700KW that operates continuously throughout the year consumes more than 3 million kWh of electricity per year, and each circulation pump affects the power consumption rate of the plant by about 0.20-0.22%. Therefore, correct maintenance and repair of circulating pumps is an important item for...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B23P6/00
CPCB23P6/00
Inventor 梁军翔李意
Owner XIANGTAN JIEXI ENVIRONMENT TECH CO LTD
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