Principle of use
The extensive use of cast iron boilers, as well as by the market's esteem, understand the use of cast iron boilers, better grasp the use of methods, so that the warm with time slowly digestion.
Cast iron boiler consists of pot and furnace two major parts, the original meaning of the pot refers to the water heated on the fire container, furnace refers to the place where fuel is burned. Hot water or steam produced in cast iron boilers can directly provide the heat needed for production and life, or can be converted into mechanical energy by steam power plant, or mechanical energy can be converted into electrical energy by generator. Boilers that provide hot water are called hot-water cast iron boilers. They are mainly used in daily life and have a small number of applications in industrial production. Steam-generating boilers are called steam boilers, also known as steam generators, often referred to as boilers, is an important part of steam power plant, used in thermal power stations, ships, locomotives and industrial and mining enterprises. The iron boiler is subjected to high temperature and high pressure, and the safety problem is very important. Even small boilers, once the explosion, the consequences are very serious. Therefore, there are strict laws and regulations on material selection, design calculation, manufacture and inspection of boilers.
It is believed that cast iron boilers are non-steel and non-iron, corrosion-resistant, long-life, widely loved, understand his principle can be better used.
Maintenance method
Starting from management of cast iron boiler
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A strict and coordinated scientific work management system should be established for the use units of cast iron boilers. The rules and regulations should be perfected, and staff should be clear and coordinated. For boiler maintenance problems may arise, rather than "checking", but to take "preventive" measures to eliminate defects and problems in the bud. If we want to form such a perfect work management system, it is necessary to establish boiler maintenance control points, which are the key factors or key factors that directly affect the maintenance effect of the boiler. Management and supply for the management of the problems arising in the management of the necessary administrative and technical management to ensure that maintenance work can be carried out in a tight and coordinated manner, in order to prevent corrosion of cast iron boilers, improve the safe life of boilers. Management can start with the following points:
1. strengthen the quality training of Stoker workers.
We should regularly train the stokers'theoretical and operational skills, strengthen their ideological education, organically combine the results of their work with their economic benefits, fully mobilize their enthusiasm for work and establish a sense of responsibility.
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2. Cast-iron boilers should be thoroughly cleaned up after stopping the furnace, especially for the rear heating surface. The management of cleaning should be strengthened, and the relevant regulations such as "Steam Boiler Safety Technical Supervision Regulations" and "Hot Water Boiler Safety Technical Supervision Regulations" should be strictly observed.
3. Strengthen the maintenance and supervision of cast iron boilers after shutdown, which requires that managers have a sense of responsibility to love their posts and devote themselves to their work.
Commonly used cast iron boiler shutdown maintenance method
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At present, the usual maintenance methods for each cast iron boiler unit are dry maintenance and wet maintenance. The main corrosion of boiler during shutdown is oxidation corrosion. The existence of oxidative corrosion is the condition of oxygen and water. In order to facilitate the use of each boiler unit, dry maintenance and wet maintenance are generally adopted.
The purpose of dry maintenance is to isolate the outside water or steam into the boiler to ensure the drying of the furnace, so as to eliminate the corrosion of the boiler water conditions.
The specific operation is as follows:
(1) prior to maintenance, the scale and heating surface of the boiler must be removed to dry metal moisture.
(2) For long-term stoppage of the boiler, the boiler room should also be rain-proof, moisture-proof, also should be painted in the furnace boiler rust-proof paint, red Dan outside the furnace, but also should be the accessory equipment clean.
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(3) in addition to placing desiccant in the header of the cast iron boiler, desiccant should also be placed in the furnace and flue.
(4) put 1 to 2 kilograms of anhydrous green calcium or 2---3 kilograms of quicklime in each cubic space.
(5) close all the holes and doors of the boiler.
(6) desiccant should be checked regularly every January. If desiccant failure is found, it should be replaced immediately.
Compared with the traditional stopping maintenance method, the alkali method plus external desiccant method not only protects the boiler body during stopping, but also protects the whole heating system. At the same time, replacing the desiccant in the furnace is much easier than replacing the desiccant in the upper and lower boiler.

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