1 do a good job in water supply treatment: Dissolved oxygen, iron ions and low pH values in the feed water all contribute to corrosion of boiler metals. Therefore, water supply should be deaerated as far as possible, feed water pH value should be greater than 7; Attention should be paid to the control of iron ion content for the recovery of steam condensing water for feedwater. Sometimes the condensation water usually contains yellow rust water as soon as the steam system is started. At this time, it should be properly discharged until the iron content is qualified before it can be used as boiler feed water.
2 keep the water quality of the pot up to standard: Generally speaking, too high salt and chlorine content in pot water, too low or too high pH value and alkalinity will increase corrosion. Therefore, it is necessary to discharge water reasonably, maintain a certain pH value, alkalinity and PO43- content of boiler water in order to keep the quality of boiler water up to standard, which can not only prevent scaling, but also be beneficial to anticorrosion.
3 prevent subscale corrosion: After scaling on the heated surface of the boiler, the pot water infiltrated under the scale will be extremely concentrated at high temperature and chemical reaction will take place, resulting in all kinds of scale corrosion, but the coverage of the scale is often difficult to detect. Therefore, boiler scaling should be cleaned and removed in time.
4. To form a protective film on the surface of the metal: For newly installed boilers, a good cooking effect should enable the metal surface to form a complete passivation protective film. Under the operating conditions, when the pot water maintains a suitable pH value (generally 10 μ 12) and a certain amount of phosphate and carbonate, it is also helpful to form a dense protective film on the surface of the metal and slow down the corrosion. However, if the boiler water quality is not well controlled, especially if the pH value is too low or too high, the protective film will often be destroyed.
5 do a good job of shut-down and maintenance: The corrosion of many boilers is often caused by improper maintenance when the boiler is shut down, and the corrosion products produced when the boiler is shut down are often accelerated when the boiler is in operation. Therefore, when shutting down the furnace, the maintenance work must be done in accordance with the requirements of the regulations.
What matters when pharmaceutical boiler maintenance boiler maintenance should be noted that pharmaceutical matters need attention are what pharmaceutical factory boiler after running for some time, is inevitable to carry out a series of maintenance work, maintenance, etc., then conducting such work what kinds of details need to pay attention to it? the following small series bring you a simple understanding. (1) In the process of maintenance, the maintenance work to have the support of the operating environment and conditions, if there is a lack of conditions should be specific conditions, to create a feasibility conditions. Before (2) Maintenance start, try to ensure that the boiler is in shutdown state, but without water, electricity, etc., in order to avoid the repair process, the occurrence of unnecessary accidents. (3) during repair, maintenance tools should regulate different place, count the number of use, so as to avoid errors by the operator, the tool is not left in the furnace or other suitable place. (4) after the repair work, be sure to carefully inspect the site, if necessary, simple operation and commissioning, to ensure that after a brief qualified operating personnel before leaving the venue. (5) The last point is that after the repair work, in addition to timely and truthfully report to their superiors, but also to make a record, learning, review, to ensure zero-error process can be done in accordance with a more standard process in the next maintenance work preferred state. In short, boiler maintenance and repair will directly affect the life of the boiler, the use of safety, efficiency, and normal operation of the equipment and so on, so be sure to regulate the operation.
Most efficiency trials conducted on this boiler have far exceeded the ‘Normal’ acceptable efficiency levels for boilers. Against an acceptable of 80-82% efficiency by the petroleum. Another distinctive advantage is the steam dryness of +5%.
Cade Shopping Mall is located in central Shanghai Hongkou District, Shanghai Daily larger flow of people in the region. The introduction of Shanghai air pollutant emission standards, boiler flue gas emissions of nitrogen oxide emissions to less than 80 mg / m, Shopping Mall a coal-fired boilers have been used for many years, NOx emissions far super to this request, the urgent need to replace more environmentally friendly low nitrogen emission boilers. Other units through the use of fast Boiler introduction and understanding, determined and fast boiler to achieve cooperation, party fast to their specific needs to recommend one condensing gas hot water boiler of a 4.2MW for heating needs of the shopping center.
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