Boiler sand blasting and spraying construction method based on boiler maintenance platform

Abstract

The invention provides a boiler sand blasting and spraying construction method based on a boiler maintenance platform. The method comprises the steps of equipment preparation, hoisting point setting,assembly of the boiler maintenance platform, debugging and checking of the boiler maintenance platform, sand blasting and spraying. The boiler maintenance platform is arranged close to a sand blastingand spraying work face in a hearth of a boiler, the boiler maintenance platform is adjacently connected with the work face, the boiler maintenance platform is wrapped with an anti-abrasion part, a sand blasting pipe is fixed to a guardrail, and a personal safety rope hanging point and a steel wire rope hanging point are arranged separately. The boiler maintenance platform is controlled to move tothe certain work face through a steel wire rope for sand blasting and spraying of the boiler. After sand blasting and spraying are completed, a platform operator photographs a sprayed position on theboiler and sends a picture to a detector. By means of the boiler sand blasting and spraying method, dead-corner-free sand blasting and spraying of the surface of the boiler can be easily completed, the labor intensity of workers is reduced, and the maintenance cost is reduced.

Description

technical field [0001] The invention relates to the technical field of boiler spraying, in particular to a boiler sandblasting and spraying construction method based on a boiler maintenance platform. Background technique [0002] The boiler maintenance platform is a safe, efficient, professional and high-quality new technology service method for sandblasting and spraying the heating surface of the water wall of the "coal-fired power plant boiler body". The boiler inspection platform itself has three independent safety protection systems, the three safety protection systems are platform independent lifting system, platform independent safety protection system and independent personal safety protection system. During the use of 100 power plants, no personal injury occurred. Safety liability accidents are by far the safest furnace maintenance method. In power generation accidents, about 60% to 70% come from the boiler, and the leakage of the "four tubes" of the boiler body is ...

AI Technical Summary

Problems solved by technology

[0005] First of all, there are four disadvantages in building scaffolding with a full hearth

[0006] The first aspect is to build a full furnace scaffold for sandblasting and spraying protection of the heating surface of the water wall, which will increase the labor intensity of sandblasting and spraying workers

The pipeline used for sandblasting and spraying work weighs 100--200kg. Every time a work area is replaced, the pipeline must be re-arranged, which increases the labor intensity of sandblasting and spraying workers, consumes time and energy, and will cause spraying on the heating surface of the water-cooled wall. Decreased quality of sand and spray

This leaves a potential safety hazard for the long-term normal operation of the unit.

[0007] Second, it takes a long time to build a full hearth scaffold

As a result, it takes a long time for maintenance, which greatly affects the normal progress of the maintenance project. If the scaffolding is found to hinder the construction work during the maintenance process, the position of the scaffolding needs to be adjusted twice to extend the construction period.

Restricted by the maintenance period of the unit, it is impossible to conduct a comprehensive inspection and elimination of key areas, and cannot play the role of preventive maintenance, which directly leads to a decline in the quality of maintenance, and even fails to achieve the expected purpose and effect of maintenance

[0008] In the third aspect, hundreds of tons of steel pipes are needed to build a 40-meter-high scaffolding for 1 million units (length 33.0 meters x width 18.0 x height 83.0 meters), which can easily cause secondary maintenance damage to the slope water cooling wall. Scaffolding also needs to inspect and repair the water cooling wall of the slope; falling objects from high altitude is a high-probability event, and damage to the water cooling wall requires secondary maintenance. Just starting the furnace and having to stop it again not only causes huge economic losses to the enterprise, but also has a negative impact on the professionals and leaders of the power plant), and there are also many hidden dangers to personal safety during the construction and maintenance process

[0009] Fourth, the cost of construction is high

[0011] The first aspect is the secondary maintenance damage caused to the furnace during the construction process

[0012] The construction materials of the full furnace platform are generally very long, large and many. In order to facilitate construction and increase the speed of construction, some power plants cut the water wall at the bottom of the vertical position of the boiler to make a hole with a width of 3 meters and a height of 2 meters. , transport the full furnace platform that needs to be assembled from the cut water wall hole to the furnace for assembly. Although this is a last resort, it has actually caused secondary damage to the water wall

[0013] The second aspect is that it is expensive to use

[0014] Every time the full furnace platform is used, a support work surface must be built from the bottom of the slag scraper to the slope water wall to the vertical water wall with a height of more than ten meters, and then it will take a lot of time and cost to build a full furnace platform on the work surface The construction of the platform itself also requires a certain cost; the accessories and components of the platform need to be purchased in advance each time it is used, and the accessories normally require a high cost; because some full furnace platforms cannot go up to the upper part of the panel superheater, a suspension frame needs to be built to complete The maintenance and cost of the panel reheater is higher; the winch system on the furnace top needs regular maintenance and replacement costs are even higher

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