How to determine the steam cfbc boiler combustion system advantages water accidents have occurred when the water level had the lowest water level is less than identity, but can still be seen when the water level in the water level, sentenced to mild water; when the water meter can not see the water level, ruled severe water shortages. The finishing state include the following: a conventional water level (1) is less than the height of drum level identifier; (2) low level alarm, automatic warning sounds, warning lights light; (3) the temperature of the superheated steam vapor is increased; (4) providing the amount of water is not a conventional, less steam flow; (5) the temperature of the exhaust gas water vapor increases.
Gas hot water cfbc boiler combustion system advantages safe operation of the precautions which the following are a few precautions and accident prone: a convection tube, water wall tube blasting reasons: l, substandard materials; installation does not meet regulatory requirements. The layered wall, does not reach the level of weld quality requirements, and other remnants of the inner tube. Wall causing local overheating and burn; 2, feed water quality does not meet standards. Resulting in scaling the wall structure, affect the heat transfer. And cause the wall temperature of the superheated blasting; 3, due to wear of fly ash. So that the wall thickness reduction; 4, fire shutdown heated too fast or too fast, so that the uneven thermal expansion of the tubes. Causing weld cracking; 5, the boiler load is too high, resulting in uneven burning and the outer tube squib severe coking and other reasons. Preventive measures squib: l, before the installation of the pipe rigorous re-examination, have welding welding process instructions; welding quality to meet the design requirements. After the pipe installation to test the pipeline through the ball, passing rate of 100%. 2, to strengthen the water quality management, a test class and demineralized water to achieve the water quality standards, regular inspection and regular elimination of scale and sewage; 3, water wall tubes and pipes to regularly check the exhaust convection, found deformed or thinned tube to be replaced, keeping in mind that the quality of maintenance, must comply with regulatory requirements; 4, the boiler can not work overload control (predetermined limit), attention furnace combustion process, the combustion to ensure homogeneous, stable; 5, note that the tube coking conditions. To achieve timely clear focus and pay attention to leakage. Second, the hot water boiler explosion: the explosion is very serious accident. Damage to equipment and buildings and heating systems are serious. And often resulting in casualties. Analysis following aspects: 1, design and manufacturing problems; a poorly designed, the uneven distribution of traffic in each circulation circuit. Heat too much deviation, solder angular, square, flat plate structure, the steel does not meet the requirements; good manufacturing and repair process. In particular dismay welding quality cells prone to rupture; 2, boiler overpressure eleven operating pressure exceeds the allowable working pressure. Stress plate (internal pressure) higher than the ultimate strength of the steel sheet caused cracking. The main reason is the failure of a safety valve, pressure gauge malfunction, Station Gauges indicate the error. Operating personnel did not take appropriate measures. Not strong sense of responsibility caused; 3, overheating; burned steel overheating broken, or too thick scale is mainly due to the water pan grease or other debris caused by blockage heating surface; 4, corrosion; inner and outer surfaces being coated plates severe corrosion of the steel sheet thickness reduction, the steel sheet insufficient strength caused by rupture; for the above reasons. Summarize a few precautions: l, for manufacturing defects in the design should take the following measures: First, reasonable design. Second, strict related materials, the preparation of three is correct manufacturing processes and process specification cards (including repair), to establish the necessary regulatory Fourth, Fifth, to improve the quality and sense of responsibility of the operators and managers; 2, to prevent overpressure . To ensure safety valve sensitivity and reliability. Regular automatic drainage time. Identify problems in time, also installed on a standard gauge for comparison. And regularly into the metering department inspection; 3, to prevent overheating. You must configure effective water treatment equipment and the establishment of the necessary rules and regulations. So that the boiler is not less furring furring and no accumulation of grease. To check the fouling situation boiler outage. If the scale. You must be promptly cleaned. Scale in order to avoid accretion; 4, preventing internal corrosion. Hot water boiler for larger capacity. The method uses thermal oxygen or chemical oxygen to resolve. In addition. To check the situation of internal and external corrosion. The extent of corrosion repair method such as pile up or Wabu according to (do this before the law, there must be approved by the technical units of the total work program and report to the local supervision departments boiler). To prevent the boiler explosion, regularly carry out the necessary checks on the boiler, at the same time, the boiler management departments should formulate effective measures, operators and managers must strictly enforce minor accidents occurred after the boiler shutdown for maintenance. Tell us about the repair of hot water boiler. 1, when the shutdown may not stop the pump immediately. To be checked after repairs boiler water temperature must be lower than the pump can be stopped when the 50 ℃, at the same time to turn off the water supply valves and heat supply network backwater valve and release the water pot. 2, before entering the boiler, the water must be emptied of all its boiler, sewage emptying all open. Manholes drum, hand holes headers have opened to air convection over time. To enter the interior work, you must pay attention: when someone is working inside. In certain drum outside a supervised. 3, before entering the combustion chamber or flue work. Ventilation must be taken, anti-virus, fire, explosion and other measures. And the total flue chimney flue or other operation of the boiler is connected to the gates are closed tightly. 4, voltage security lighting to use. If the flue inside the drum and more humid. Lighting voltage can not exceed 12V. If dry, the lighting voltage can not exceed 36V. But also have to do to ensure proper safety measures. Do not use open flame lighting.
April 15 --16 days, ASME joint review by the American Society of Mechanical Engineers group assignment, our company ASME quality control system and demonstrate products on-site audit. After a strict and rigorous audit, the joint review team leader (AIS) announced: "fast Boiler Co., Ltd.-site audit by ASME recommendation issued: power cfbc boiler combustion system advantagess (S) and pressure vessel (U) Certification and Seal"
How to determine the level of small gas steam cfbc boiler combustion system advantages in severe cases, to carry a large amount of water steam, increasing the salinity of small gas steam boiler, water hammer occurs sound steam pipe, the steam from the connection flange drop out; when the water supply It is less than the flow rate of steam flow, or if due economizer tube rupture caused by lack of water, the opposite phenomenon occurs. When the severe water shortage, from the door you can see the red water wall tube, you can also smell the coke. Meanwhile, the tube may crack, this time can be heard the blast, and the vapor and flue gases discharged from the door, fire doors look. Small gas steam boiler when the water level is below a predetermined value, the fan motor should be stopped, the induced draft fan and grate speed reducer, the security level is lower than the low water level, the water level gauge glass (plate) as a white. Rinse water level gauge to determine the small gas steam boiler is full of water and mild or severe full of water. Method: Turn off water level, water plug, then open the drain plug, if they can see the water level from top to bottom, indicating that it is a little full of water, open sewage valve, into the normal water level. If the water is full of serious, due to take urgent measures to stop work.
Combustion efficiency of Fluidized Bed Combustion (FBC) Boiler is 90% or greater. TYPES OF Fluidized Bed Combustion FBC Boiler. Fix Bed Boiler; Bubbling fluidized bed (BFB) Boilers; Circulating fluidized bed (CFBC) Boilers; Fluidized Bed Combustion FBC Boiler types. These above fluidized-bed units mostly used to meet the demands of industries.Learn More
Advantages of Fluidized Bed Combustion Boilers. Low combustion temperature- lt900 DegC lead to less Nox emission. Sulphur present in coal can be recovered in-situ by adding limestone. SOx emission can be reduced gt90 ; S O2 ? SO2 ; CaO SO2 1/2 (O2) --gt CaSO4 ; Poor quality coal/lignite, coal washery rejects, containing ash gt70, can be used.Learn More
Aug 01, 2016 · The advantages of this system include the potential efficiency savings and the ability to be applied to larger boilers. The main disadvantage is the potential for air and fuel flows to get out of adjustment, which creates an unsafe situation.Learn More
The gas turbine exhaust supplies combustion air for the atmospheric circulating fluidized-bed combustor that burns the char from the PCFB partial gasifier. CHIPPS. A CHIPPS system is similar, but uses a furnace instead of an atmospheric fluidized-bed combustor. It also has gas turbine air preheater tubes to increase gas turbine cycle efficiency.Learn More
design and operating characteristics of Thermax AFBC boilers offer a number of advantages for industrial steam and power generation. Combustion temperatures of the AFBC process are maintained below the fuel ash softening temperature, soLearn More
The Industrial Plant & Engineering Divisions core business activities comprise the EPC of thermal, co-generation, combined cycle power plants as well as the supply of industrial boiler, circulating fluidized bed combustion (CFBC) boiler, heat recovery steam generator (HRSG), process plants and process equipments.Learn More
advantages of a fbc boiler Considerable reduction in boiler size is possible due to high heat transfer rate over a small heat transfer area immersed in the bed.Learn More
Figure 2 provides a rough overview of CFBC. Generally, CFBC consists of a boiler and a high-temperature cyclone. The intra-furnace gas velocity is as high as 4 to 8 m/s. A coarse fluidizing medium and char in the flue gas are collected by the high-temperature cyclone and recycled to the boiler.Learn More
Heat Recovery : Heat Tracing Systems : Hepa Filters STEAM ADVANTAGES . in large distribution systems to compensate for heat losses and to ensure that steam is . Installing a rainwater harvesting system can be costly, with systems ranging from the low hundreds to the low thousands in cost.Learn More
Circulating Fluidized Bed (CFB) combustion boilers gives the flexibility for combustion of a wide range of coals and alternative fuel sources. All this without compromising efficiency and with reduced emissions. The key differences of the CFB boiler with the universally accepted Pulverised coal firing is discussed in this article.Learn More
Key Advantages of the Foster Wheeler CFB Fuel flexibility is an operational and economic advantage Wide range for design fuels Can Handle Difficult to burn fuels (lignites, high ash, low volatiles, high moisture etc.) Ease of Co-Firing of Opportunity fuels (biomass, pet cokes, etc.) Excellent emission performance Low SO x /NOLearn More
Jan 15, 2019 · A steam boiler is designed to absorb the maximum amount of heat released from the process of combustion. There are three way (Radiation, convection & Conduction) that heat is transfer in the boiler and relative percentage of each heat transfer within system boiler is dependent on the type of steam boiler, fuels and the designed transfer surface.Learn More
In CFB boiler limestone addition in the furnace reduces the Sulphur Dioxide during combustion itself. This requires only a simple limestone storage and handling unit. In PC boilers around 15 % of ash collects at the bottom of the furnace and the balance in the electrostatic precipitators.Learn More
Fluidized bed combustion (FBC), a system in which the fuel (e.g., coal) is fed into a solid bed, which has been fluidized by an upward movement of air, includes technologies such as atmospheric fluidized bed combustion, circulating fluidized bed combustion (CFBC), pressurized fluidized bed combustion, pressurized circulating fluidized bed combustion, and bubbling fluidized bed combustion. Such systems offer several advantages, including a simple construction and flexibility in use of fuelLearn More
List the advantages of CFBC boilers over AFBC boilers. Higher processing temperature because of high gas velocity through the system. Lower combustion temperature of about 870 o C can be achieved constantly, which results inLearn More