parts of a fire tube boiler

In the last meeting on April 16, the hard efforts of audits and company officials of president Mr. Lu Haigang couplet review group to pay thanked rigorous review and couplets group work style, professional skills to express my sincere admiration. Ms. Jiang Lianju warranty division said it will continue to improve the ASME quality control system to ensure produce sophisticated products comply with ASME standards. According to ASME certification process, after the on-site audit, the company will obtain certification and stamp issued within 20 working days, this will be the development of our company in the history of another "milestone" event.

The design of the power station needs the participation of the design institute with the qualification of electric power design. The principle is firstly put forward by the owner, and then the design institute selects the steam turbine according to the owner's requirements and selects the parts of a fire tube boiler according to the intake parameters of the steam turbine with considering the loss of pipelines.

The second is shutdown pressure, set to minimum, range to 6 (0.6MPa). The third is the overpressure alarm, set around 0.7Mpa. Tip: in the process of adjusting the pressure controller must first adjust the difference, then adjust the range. The pressure controller of a gas-fired steam parts of a fire tube boiler is debugged, generally following this principle: Extremely high pressure, is used as overpressure protection; High pressure, used as boiler start-stop control; Low pressure, used for large, small fire conversion. The specific pressure range can be adjusted according to the rated pressure and operating requirements of the boiler.

The common corrosion of industrial parts of a fire tube boiler is mainly oxygen corrosion and scale corrosion, and the main measures to prevent it are as follows:

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.

Fire Tube Steam Boilers - bosch-industrial.com.au

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Fire tubes boilers are also known as a smoke tube boiler. Water tube boiler: Water tube boilers are those boilers in which water flows through a number of tubes (called water tubes) and the hot gases produced by the combustion of fuel in the boiler furnace while on their way to chimney pass surrounding the tubes. Heat from the hot gases is transferred to water through the walls of the water tubes. Examples of water tube boilers are Bab-cock and Wilcox boiler, Benson boiler etc.

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