After electric fired steam boiler for food factory shutdown, how to carry out maintenance in the long-term disabled electric steam boiler, furnace should pay great attention to external corrosion and maintenance problems. First, after power shutdown cooling steam boiler, the ash must be thoroughly cleaned and the heating surface fouling the upper grate, the lower portion of the furnace. Then to maintain a certain degree of natural ventilation flue. In general, in order desiccant moisture should be placed in the furnace, flue. The quicklime as a drying agent, within the furnace or flue gas per cubic meter should be placed generally about 3kg. After placing all the ventilation should be tightly closed doors. After the change of lime powder to be replaced. Low-lying position as boiler room, ground during shutdown severe flood tide, often approach should be used and placed a small fire to dry desiccant combination. If the boiler shutdown a long time, after the complete removal of soot coated with an anti-corrosion red lead paint in oil or other metal surface furnace. As for anti-corrosion maintenance methods inside the furnace shutdown, the shutdown Yaoan the length of time to be. In general, no more than one month shutdown maintenance wet available, more than one month should be taken to maintain dry. To note the following problems when a dry maintenance: desiccant boiler not in direct contact with the metal surface, may be mounted in a container such as the iron plate after the desiccant is placed, and a hole for shutting the other hand hole cover, valve steam, the water pipe change must cut lime powder should be replaced.
Boiler cleaning the necessity and significance of the boiler after a long run, the inevitable emergence of scale, corrosion problems, these problems are due to the generation of scale, so that the heat transfer deterioration, resulting in reduced efficacy boiler. It is difficult to achieve nominal evaporation; and since the heat transfer is deteriorated, such that the metal overheating, under pressure boiler, furnace tube bulge occurs even explode; poor thermal conductivity, so that the fuel consumption is increased, increased operating costs, boiler shortened life expectancy. Therefore, the boiler scale, should take the necessary cleaning methods. Of the boiler system operated at optimized state, it must be specialized chemicals treatment of boiler system water system: to remove scale, rust and anti-corrosion treatment: 1 chemical cleaning: adding a chemical cleaning agent to rust in the system , dirt, cleaning oil dispersion is discharged, reduced to clean metal surfaces; 2, routine maintenance: boiler scale inhibitor is added, to avoid rusting of metal, to prevent the crystalline precipitate calcium and magnesium ions. Boiler cleaning in two parts, part of convection boiler tubes, superheater tubes, air heaters, waterwall tubes scale, rust cleaning, i.e. water boiler water treatment, we used the final Li Jing Ling descaling operation, neutral cleaning technology cleaning operation, relatively low cost; cleaning of the part of the outer tube, i.e. the cleaning of the boiler furnace, we used high-pressure water jet cleaning technology, it is possible to achieve good results. 1, the cleaning operation may be neutral at neutral or weak alkalinity (pH 7-12) conditions, the water does not change the operation of the boiler a predetermined state index, do not stop cleaning, cleaning can reduce the loss caused by the stop, this is a the only signs of cleaning. 2, security theory and practice of running the boiler have proven non-erosive, washed acid-free cleaning under neutral conditions, the corrosion rate is less than the water washing of the corrosion rate of the metal, no corrosion damage to the metal. 3, non-toxic and pollution-free operation of the Spirit is a green cleaning products, boiler blowdown COD after its cleaning. BOD. The pH full compliance with national standards. 4, easy to use drugs added to the water supply can be, without a separate professionals, post operator can operate, it can be widely used. 5, a significant saving, the cleaning process in which water is the normal production water, unlike dispensing additional consumption pickling, passivation, and a large number of repeated washing of freshwater resources consumed. High pressure water jet cleaning technology uses water as the medium, so that the water system by special equipment to produce multi-beam, multi-angle, high-pressure water jets of different intensity. Internal cleaning object fouling, plugging, or be completely cut surface adhesion, crushed, pressed and washed in order to achieve complete cleaning. Whatever the fouling deposits, high pressure water jet cleaning device for cleaning, can be completely removed, which considerably metal color. It does not require chemicals, or corrosive flux, safety, and environmental protection. Boiler air preheater, waterwall, superheater, economizer heating surface and the like due to clogging of the exhaust gas temperature, boiler efficiency is lowered, increasing the wind electrical energy consumption; the fan will cause severe blockage afford pulling negative pressure oxygen furnace not enough, boiler forced outage. Using high pressure water jet technology, the cleaning effect is obvious. Equipment from high pressure water pump, water hoses, high pressure gun, special nozzle and other components. Cleaning process: water pressure via a high pressure pump to the 50 ~ 100Mpa, via line transferred to the system actuators work surface, forming a bundle of fine high-pressure water emitted from the nozzle with a high pressure water jet but powerful strike capability, which exit velocity up to 380m / s, the heating surface fouling rinse. The high pressure cleaning technology to clean, easy to adjust, cleaning equipment to be non-corrosive, non-polluting the environment, the effect is obvious characteristics, is an effective and a good way to save money and effort, especially suitable for solving air preheater clogging, severe coking furnace heating surface slagging problems. Generally reduce exhaust gas temperature of 4 to 12 degrees, the main improved reheat steam temperature of 0.5 to 5 degrees, to reduce electrical energy consumption for the wind, and early detection of creeping inflation, under scale corrosion risks, the unit safe and economic operation of very help.
Risk factors for gas fired steam boiler for food factory steam boiler gas boiler risk factors get in the industrial field has been widely used. However, the safety of heat transfer oil boiler has been neglected. Safety heat oil boiler is not only related to the normal operation of the plant, also related to the safety and efficiency of the staff of the enterprise. security issues heat transfer oil boiler should be aroused widespread concern in the community, its vital security issues. pot body portion and a body portion of the furnace for gas-fired boiler, the occurrence of physical experience pot explosion. for liquid boiler, the boiler combustion flame in the furnace section, if the boiler burning coal, there will be a burning fire, gas and fuel boiler chemical explosion. gas boiler is a highly dangerous material having high temperature, high pressure, flammable, explosive and other characteristics. in practice, these reasons, we could cause some problems negligence or illegal operation, so inevitably lay hidden dangers. first, you must ensure that safety heat transfer oil boiler. in use of the device, the device needs to be checked regularly to ensure that the heat transfer oil boiler heating system in good shape , The strength of the wall of the pressure equipment and devices to check that there is no problem; Second, employees must strictly follow the instructions Due to the special nature of the gas steam boiler, inflammable and explosive materials pose a security risk, the operator must be trained. familiar with the device structure, operating strictly in accordance with the articles of association; third, to ensure that the gas does not mix with water vapor gas steam can not be mixed with low-boiling substances and explosive substances, otherwise the consequences could be disastrous.
At 15:31 on January afternoon 55 points, Zhangjiakou Municipal Publicity Department announced through the official micro-Bo: Zhangjiakou Shiqiao Eastern red floor Combibloc bath center for illegal use of obsolete coal-fired boilers, boiler and furnace door ring gall bladder junction cracking, resulting in rapid ejection soda.
At present, the accident has killed two people were killed and two injured, the injured have been rushed to hospital.
Since the accident the suspect, the suspect has been controlled.
It was a painful stricken by the accident, the suspect illegal use of coal-fired boilers have been eliminated, resulting in four families forever pain.
As can be seen from the government over the country began to strictly limit the use of coal-fired boilers, coal-fired boilers in order to face a fate or modification or elimination of the unlawful use of coal-fired boilers have been eliminated but can cause great harm, the accident is a obvious example.
Therefore, actively cooperate with the investigation of the relevant units of boilers, boiler out of strict compliance with the Code and running, grasp the safe operation of the boiler to a large extent, reduce the occurrence of such tragic accidents.
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