The fuel regulation subsystem of hot water why water tube boiler pulsating on high fire adopts a feed-forward-feedback cascade control system similar to the steam turbine power-frequency electro-hydraulic control system. The main regulator adopts the proportional regulator, which corresponds to the frequency difference amplifier in the steam turbine power-frequency electro-hydraulic regulating system. The proportional band is equivalent to the unequal rate of the steam turbine. The size of the proportional band represents the capacity of the hot water boiler with load, and the larger the proportional band, the greater the load capacity of the hot water boiler. The capacity of hot water boiler with load is stronger; The auxiliary regulator adopts the proportional integral regulator, which corresponds to the power regulator in the power-frequency electro-hydraulic regulation system of steam turbine, and introduces the feedback signal of fuel quantity to the power-frequency electro-hydraulic regulation system of steam turbine. The effect of the first stage pressure signal of steam turbine is to eliminate the spontaneous disturbance of the fuel quantity of hot water boiler quickly. Hot water boilers are mainly used for heating and bathing. The hot water boiler circulates the hot water of the heat preservation tank through the hot water circulation pump and heats the hot water of the water tank again and again so as to achieve the purpose of bathing. The hot water boiler circulates the hot water of the heating pipe through the hot water circulation pump, and meets the requirement of people's heating through the radiator (radiator), and the hot water boiler and the hot water circulation pump cooperate with the heat exchanger can realize the double function of bathing and heating. The inlet speed of hot water boiler before start-up should not be too fast, usually no less than 4 in winter H, 2 to 3 hours in other seasons, especially at the beginning of the inflow. The inlet water temperature of a hot water boiler is generally at 50 ℃ 90 ℃, so that the difference between the feed water temperature entering the drum and the wall temperature of the drum is less than 40 ℃. The inlet water temperature of the gas-fired hot water boiler without complete cooling can be compared with the drum wall temperature, otherwise, the inlet water speed should be slowed down. When the feed water enters the drum, it always contacts the lower half wall of the drum first. If the difference between the feed water temperature and the drum wall temperature is too large, the speed of entering the water is fast, the upper and lower walls of the drum, the inner and outer walls will produce a larger expansion difference, resulting in a greater additional stress to the drum. Causes the steam drum to deform, produces the crack when serious. Because the wall of the drum Thick, slow expansion, and connected to the drum wall thin wall, expansion faster. If the inlet temperature of gas-fired hot water boiler is too high or the inlet speed is too fast, it will cause uneven expansion, crack of welding joint and damage of gas-fired hot water boiler.
Inside the Fangkuai why water tube boiler pulsating on high fire plant, there is a special corrugated furnace bladder production line, which can be processed according to the computer setting mode. At the same time, this is also a unique processing technology of Fangkuai Boiler. The cost of natural gas fuel alone exceeds 5 million yuan per year. The corrugated furnace liner fired by this production line can not only increase the heating surface of the boiler, but also alleviate the damage caused by the thermal expansion and contraction to the combustion chamber, and greatly extend the service life of the boiler.
Analysis of steam why water tube boiler pulsating on high fire down for maintenance and corrosion knowledge of what steam boiler down for maintenance and corrosion analysis after a close knowledge of steam boilers, must be maintained to prevent internal boiler corrosion. Second, short-term maintenance. Wet maintenance method employed; That is, after stopping the furnace, the furnace is filled with water and air is completely discharged. Third, long-term maintenance. Can be maintained using a dry method, i.e., a furnace rear stop released water, lower aperture open, the pot water dried, and the desiccant was placed in the lower aperture, regular replacement, and replacement can begin monthly check. Once, it can be done once every three months. However, it should be noted that all the desiccant must be removed before the boiler starts. Make an effective maintenance method first steam boiler, a steam boiler feedwater should be as close to the furnace temperature, preferably higher than 20 ℃. Second, we must regular inspection, maintenance and cleaning of the low water level cutting device. At least once a month to clean water level controller, water level wash at least once a day. Water level should be at the highest level; after washing, the water level should not be below the minimum safe level. If you do not wash clean, can be washed several times, but it must be cleaned at the highest level. Third, we must carry out regular sewage discharge operation, at least once (once per shift) per day. After the sewage, the sewage should check valves leak due to the influence of dirt; if so, it must be excluded. 4. When the boiler without maintaining close vapor pressure steam boiler space will keep the air and negative pressure is generated. Thus, when the re-ignition, the total steam valve should be opened first.
Boiler Plant softened water pollution to identify the type of why water tube boiler pulsating on high fire plants soften water pollution type of identification to identify the type of pollution to a comprehensive raw water quality, the design parameters, pollution index, running records, equipment performance indicators and Microbial be judged: ⑴ colloidal contamination: contamination occurred colloid when, usually accompanied by the following two characteristics: A, pretreatment microfilter clogging quickly, especially pressure increases rapidly, B, SDI value is usually 2.5 or more. ⑵ microbial contamination: microbial contamination occurs, the RO water through the apparatus and total number of bacteria concentrated water are high, usually have no maintenance and sterilization as required. ⑶ boiler calcium scale: can be adjusted depending on the raw water quality and design parameters. Of water in terms of carbonate, if recovery of 75%, adding the designed inhibitors, the LSI concentrate should be less than 1; LSI concentrate without scale inhibitor should be less than zero, typically It does not produce calcium scale. ⑷ available 1/4 inch plastic PVC pipe insertion component performance changes in different parts of the test assembly is determined. ⑸ determines the type of contamination of the change device performance. ⑹ available acid (such as citric acid, dilute of HNO3), and the cleaning effect The cleaning liquid is determined limescale, the cleaning liquid composition is further confirmed by analysis. ⑺ liquid cleaning chemical analysis: Take the raw water, cleaning liquid, cleaning liquid, three sample analysis.