fire tube boiler and water tube boiler

The common corrosion of industrial fire tube boiler and water 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.

Does the different types of hot water fire tube boiler and water tube boilers correspond to different use occasions?

Hot water boilers, from the current point of view, are widely used, and there are different types, different types have different scopes and applications, so on this issue, it is obvious that the answer is yes, that is, who Different types of boilers are used for different applications. In addition, in addition to knowing this, you need to know that different types of hot water boilers have different specifications and parameters.

First, the reason for not operating a burner, the gas pressure is lower than the low voltage protection switch. On Check gas valves are open, if there is gas in the tank. 2, the gas pressure is higher than the pressure protection switch. Shut off valve, and check the pressure reducing valve or regulator box has failed. 3, steam fire tube boiler and water tube boiler water level is too low, there is very low interlock. Boiler water level observation, grasp the true level, after manual Sheung Shui to eliminate problems. 4, gas steam boiler pressure is higher than the starting pressure. Natural gas and other boiler pressure to reduce the pressure to start, you can start properly. 5, but the leak valve block. Manifolds may be a leak. 6, the burner or blacksmith ion probe no reliable ground line. Second, the matter before the gas boiler operation Note 1, gas steam boiler before ignition must conduct a comprehensive examination, including the burner and related accessories and pipes are complete good, the operation is flexible. Before the water is not required to close the drain valve, open a safety valve, allowing air furnace can be discharged. After all the examination was normal, boiler before ignition Sheung Shui, Sheung Shui to drum should be the normal water level, turn on any air, flue baffle. Start the blower, the flue of the furnace and vent purge, purge time is not less than 30 seconds, and then start the ignition burner. 2, the treated water injected into the gas boiler, the water temperature should not exceed 40 ℃, when the pot water level reaches the lowest level, i.e. the inlet valve closed, to observe whether the water level is lowered. After firing the pot should always pay attention to the water level, the water level will rise as a result of exceeding the maximum safe water level can be heated sewage. 3, when the gas and steam emitting steam boiler the safety valve opens, the safety valve should be closed, when the boost to 0.2 ~ 0.3MPa, inspection manhole discharge valve leaks and the like.

In a number of bidders, the party quickly ready gas water tube fire tube boiler and water tube boiler with its unique advantages of low nitrogen come out on top; the low nitrogen gas water tube boiler has the following advantages. 1, boiler factory ready, body welding, manufacturing completed in the factory, quality is the best guarantee to ensure the long-term safe and reliable operation of the boiler. 2, a small work site installation, short cycle, the boiler body all-membrane wall structure, effectively reduce heat loss boilers, to improve the thermal efficiency of the boiler. 3, boiler furnace, convection and rational use of two-pass arrangement flue gas velocity, effective control of the flue gas resistance, no fan, lower operating power consumption, energy saving. 4, micro-pressure combustion, the boiler to prevent the air leakage phenomenon, to effectively control exhaust excess air coefficient, reducing heat losses, improved boiler efficiency. 5, with forced water circulation system, the flow rate of each process are selected in accordance with the recommended standard upper limit value, to ensure that the cold boiled heating surface does not occur too, causing water hammer or squib; preventing sedimentation oxygen corrosion and impurities in the water, to avoid heat boiler accident damaged surface;? burner flame, gas overpressure or low pressure, 15 kinds of safety warning and fault protection device leakage protection, gas, comprehensive guarantee safe operation of boilers;? intelligent integration operation control system, with touch-screen operation Dual purely manual control buttons and functions.

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