ZG is one of the largest 65bar gas fuel stress damage tube boilers supplier. We ensure quick and reliable processing of customer order.With amaintenance service contract, our customer service engineers undertake two or four times per year the inspection and maintenance of customer boiler and firing system. Through our professional maintenance operating safety and availability of gas fired boiler system is increased, the fuel consumption optimized and production downtime avoided.
1.4 MW horizontal gas-fired thermal oil heater project for food industryCharoen Pokphand Group is a well-known multinational company founded by a Thai Chinese, also known as the CP Group, its output value and scale are both the leaders of the industry. In 2016, CP Group invested Jilin Chia Tai Food Co., LTD. to expand its scale, which has an annual processing capacity of 100 million broilers. During the processing of broilers, whether the disinfection & distillation, baking & stewing, or heating & drying, the heat source provided by the the steam stress damage tube boilers is required. In order to purchase a set of high-performance and low-emission boiler, CP Group carried out a public bidding.ZOZEN started from the actual demand of CP Group and successfully won the title of general contractor of Jilin Chia Tai Food with strong comprehensive strength and systematic solutions, then provided 3 sets of 1.2 million kcal gas-fired thermal oil heater systems. During the installation, the heat transfer tubing extended from the boiler room on the first floor to the production workshop on the the third floor according to the original project design of CP Group, but the oil supply didn't succeed while the parameters of the thermal oil heater system were all normal after testing. In view of this, the technical team of ZOZEN discovered through investigation of the entire project that the oil supply failed because the original pipeline pressure was insufficient. After a series of calculations and demonstrations, ZOZEN technicians added a booster pump at the end of the oil supply pipeline, which successfully solved the problem for CP Group. At present, these batches of thermal oil heaters have been in operation for three years. ZOZEN thermal oil heaters gained high recognition from the leader of CP Group with good performance and low failure rate.
In order to improve ambient air quality in the region, Linfen City, Shanxi Province with the actual situation, issued a notice "Linfen City in 2019 iron and steel, coking industry depth reduction plan". "Program" is mentioned, requiring all enterprises in the implementation of the transformation process of governance, compliance with the target, select advanced, mature, stable, and reliable control technology implementation of the transformation.
1, the end of June 2019, to complete the iron making and steel making ultra-low emissions transformation; the end of October 2019, the completion of the sintering head (pellet sintering) transformation of the ultra-low emissions.
Acceptance criteria: sintering (pellet) smoke particulate matter, sulfur dioxide, nitrogen oxide emissions in the reference oxygen concentration of not higher than 16% under the conditions (18%) of 10mg /, 35mg /, 50mg / m3; iron, other processes steelmaking emissions of particulate matter, sulfur dioxide, nitrogen oxides emission concentration is not higher than a standard 10mg / m3,50mg / m3,200mg / m3 of.
2, before the end of October 2019, the city's iron and steel enterprises to fully complete management and monitoring of fugitive emissions, fugitive emissions control, control, governance intelligent integration platform built
Acceptance criteria: transformation, steel companies outside the main source of fugitive emissions at 1 m, the particle concentration is less than 5mg / m3; the concentration of particulate matter emissions by organized collection after treatment is less than 10mg / m3.
3, the end of June 2019, to complete the coke pushing, coke ultra-low emissions of other transformation step; the end of October 2019, to complete the transformation of ultra-low emissions oven chimney.
Acceptance criteria: coke chimney particulate matter, sulfur dioxide, nitrogen oxide emissions in the reference oxygen concentration of not higher than 10mg / m3,30mg / m3,130mg / m3 under the conditions of 8%; coke oven coal, coke pushing step particulate matter emission is not higher than a standard concentration of 10mg / m3 of.
4, before the end of October 2019, the city's coking enterprises fully completed fugitive emission control and monitoring, fugitive emissions control, control, governance intelligent integration platform.
Acceptance criteria: transformation, mainly coking fugitive emission sources outside 1 m, the particle concentration is less than 5mg / m3; the concentration of particulate matter emissions by organized collection after treatment is less than 10mg / m3.
Biomass fuel boiler for Power Station
boiler tube failure like, short time overheating, long time overheating, creep, thermal fatigue, mechanical overload, corrosive fatigue[1,2], Solid particle erosionLearn More
The REDUC boiler is model VU-60, nominal charge 365 ton/h of steam, design pressure 119 kgf/cm 2 and operating pressure 104 kgf/cm 2. The strength of a boiler tube depends on the level of stress as well as on temperature when the tube metal temperatures are in the creep range.Learn More
Stress assisted corrosion is primarily known to cause failures in the waterside tubes of water tube type carbon steel boilers. Residual stresses tend to be higher where the tubes have been rolled into the drum walls.Learn More
May 09, 2009 · Part 2 Flow Accelerated Corrosion (FAC). Stress Corrosion Cracking (SCC) Hydrogen Damage Sulphur corrosion Graphitization Thermal Fatigue Waterside Corrosion Fatigue SootLearn More
There are many reasons for boiler tube failures such as pitting, stress corrosion cracking, stress rupture, creep, erosion, and thermal fatigue,,,, . The failed boiler tube in this investigation is made from 20G steel.Learn More
Straight tube, shell-and-tube waste heat boilers frequently develop tube and tube sheet failures due to the imposition of unequal stresses. A primary cause of this is the uneven distribution of hot gases across the face of the tube sheet.Learn More
power plants the boiler tube materials start to deform wall thinning and creep damage analysis in boiler tube and optimization of operating conditions at a temperature around 593OC. It is due to metallurgy of the tube materials moreover, prolong exposure to high temperature and highLearn More
Boiler tubes have limited life and can fail due to various failure mechanisms. Tube failures are classified as in-service failure in boilers. These failures can be grouped under six major causes. stress rupture, fatigue, corrosion, erosion, material failure and welding defects. II. BOILER TUBE FAILURE MECHANISM 2.1 Types of FailureLearn More
Sep 12, 2017 · Steam Boiler Quiz 3. Thermal shock is the stress imposed on the boiler metal by a sudden and drastic change in pressure.Learn More
Impact the tube with a sharp object - The tube material is fairly soft and even a cold chisel dropped from a few feet away can result in a gouge and a localized thin spot on the tube. Any added stress can cause the unit to fail when it is pressurized and can also serve as a point of concentrated corrosion. This type of damage is common when boiler convection sections are mechanically cleaned of hard buildups, or when refractory repairs or repairs to other tubes are made.Learn More
Oct 12, 2018 · Stress accelerated corrosion (SAC) can be described as a localized failure of a nominally protective magnetite (Fe3O4) film resulting from mechanical and/or thermal stresses on the tube, thus permitting the corrosive medium in this case, high temperature water/steam inside the boiler tubes to access the substrate to advance steel corrosionLearn More
tube wall and hoop stress that acting on the wall.10 3.2. Statistical Analysis Two level factorial design was adopted to ﬁnd main and interacting affects of process variables on the remnant life and the creep damage of boiler tubes. The low points, mid-dle points (median points) and high points were speciﬁedLearn More
Boiler tubes are susceptible to certain damage mechanisms, including: boiler feed water corrosion, graphitization, thermal fatigue, and; corrosion fatigue. In order to help prevent boiler tube failures, in 1985 the Electric Power Research Institute (EPRI) developed the model for a Boiler Tube Failure Reduction (BTFR) Program. The implementation of this program has greatly reduced the costs associated with failures.Learn More
somewhere between 8% and 12% of fire tube boilers in the UK have been found to be affected. The reverse fillet welds of the main tube to shell and furnace tube to tube sheet are the most common places of attack in fire tube boilers and the problem is often described as toe cracking. Failure is initiated at the surface in a high stress area.Learn More
Failures are catastrophic, thick-lipped failures that initiate from ID cracks that are oriented perpendicular to the direction of the stress. Causes: Tube damage occurs due to the combination of thermal fatigue and corrosion. Corrosion fatigue is influenced by boiler design, water chemistry, boiler water oxygen content, and boiler operation.Learn More