Writer： admin Time：2021-07-31 00:00 Browse：℃
Electromagnetic valves industrial burners is electromagnetically controlled industrial equipment, automatic control is the basic element of the fluid, belonging to the actuator, but is not limited to hydraulic and pneumatic. Industrial control systems for regulating the parameters of the medium in the direction of flow, speed and the like. Analysis and Application of energy saving technical characteristics with the view of the burner
Burner technical features analysis and application of energy saving
The core member is injection boiler burners, is a predetermined proportion of fuel and air, the mixing speed and efficient manner away furnace, combustion cleaning apparatus, safety, economic operation not directly affect the safety and economy of the boiler sex. But the original burner technology can not meet the safety, environmental protection, energy saving and operational requirements, so gradually in recent years the introduction of foreign new burner technology domestic heavy oil field. After testing, part of the new burner has been applied more widely, and achieved certain results. A burner with the technical specifications of the burner structure according to the general kind of fuel into the fuel (including heavy oil, other fuel, etc.) burner, gas burner, pulverized coal slurry or coal burners. Industrial oil presently used by the base Burner fuel system, air supply system, ignition system, monitoring system, electric control system. Each functional: a fuel system ensure that the fuel required for the combustion; air supply system has been fed into the combustion chamber a certain amount of wind speed and air; mixture of air and fuel ignition system ignites a; a monitoring system to ensure safe operation of the burner ; electronic control system is the command center and the focal point of the above systems. To meet the needs of the combustion process in the boiler, boiler and other equipment to ensure safe, reliable, efficient and economical run and low pollution emissions, the burner should have the main technical features include: high combustion efficiency, reasonable air distribution, to ensure stable fuel burn completely, plant emission standard indicators. The shape and length of the combustion flame should be compatible with the furnace, the flame fullness good flame temperature and output power should meet the requirements of the boiler. Regulated performance. Burner should be able to adapt to the boiler load regulation needs, namely to maintain stability at the lowest to the highest load boiler, tempering and from the fire does not occur. Easy ignition and operation regulation, safe and reliable operation; simple and compact structure; high degree of automation, easy maintenance. Adjusting means little wind resistance, a small operating noise. If the operating performance of the burner is not good, it will affect the boiler combustion conditions, as follows: incomplete combustion, pollution, the tail heating surface boiler, exhaust gas temperature rise, and even cause secondary combustion. Combustible gas (or solid) incomplete combustion, increased heat loss. Or oil burner outlet furnace coking. Flameout, even tempering furnace explosions and other accidents. Second, use the burner status quo from the early 1980s, heavy oil thermal recovery boiler since the introduction of high-pressure steam injection, thermal recovery of heavy oil heating plant in North America using 6131-type automatic combined oil and gas dual burner more than two decades, the burner technology belong to the 1970s level, its technical, safety performance has lagged far behind similar products today. Currently, North America burner following problems: boiler ignition system and gas system there is a deviation, furnace intrinsic safety can not be guaranteed, the accident occurred when the blast furnace stove points. Air-fuel ratio is adjusted and the damper rod throttle opening by a pneumatic actuator to complete, it will produce large errors after running for some time, therefore, it must be adjusted periodically corrected. Due to the long run, a burner (burning oil) the air distribution plate coking occurs, resulting in uneven air distribution, a flame-shaped flame failure, migraine and other fire phenomena. Pneumatic actuator using compressed air as power, convenient operation and maintenance. Point furnace complicated operation must be completed by the two co-operating staff. Flue gas containing O2 or CO value is high, the combustion efficiency of the boiler is low, and prone to CO poisoning. To sum up, North America's far-burner due to the design, specification, control backwardness, lack of security, leading to complex burner operation, there are many security risks. At the same time reached "industrial fuel gas burner general technical conditions", GB13271-2001 "boiler air emission standards" other than standard GB / T19839-2005 in energy saving and environmental protection. Note the steam boiler is required to introduce new burner with advanced technology in the field. Third, the performance characteristics of new energy-saving burner in recent years, the domestic heavy oil thermal recovery inject new burner steam boiler applications are mainly Germany Zach, Weishaupt, Olin Finland, Italy Riyadh Road, An Nuoji other brands, although many brands , but the structural principle, performance characteristics substantially the same chronological order starting procedure used is required to enter the operational phase power adjustment, flame monitoring, etc. have to meet international standards, with high combustion efficiency, energy saving, safe and reliable, automatic and high level of control. Taking practical application Zach SG-A-148 gas burner for example. 3.1 high combustion efficiency, energy saving use of gas ring burner, mixed diffusion combustion mode. Gas through the safety valve, the gas regulating valve, integrated into the gas distributor inside the burner with four adjustable secondary natural gas nozzles ensure flame stability. Gas and air streams in the mixing furnace opening, perpendicular to the primary fuel and air mixing, parallel to the secondary fuel and air mixing. Combustion air from the central air tank is divided into two portions i.e., a secondary air with the secondary air guide vane ring, a flame shape (length, diameter) can be adjusted to ensure full combustion, good flame stability. Staged combustion in such manner to reduce the nitrogen during the combustion process, generating oxide fuel mixture more fully, the flame does not cleave not red and is transparent, it can significantly reduce the fuel consumption. 3.2 Combustion control concept advanced combustion process controller reasonable degree of opening of the electronic controller adjusting the load, and throttle valve position feedback from the respective sensor signal to the controller via a resistor, while the temperature compensation air into the furnace, the controller receives input after the feedback signal, the signal stored human curve set value is compared, after arithmetic processing, a pulse voltage output of 220V to the damper and the valve servo motor, adjusting the opening degree of the throttle and valve, so that the air volume, air and provided set values coincide, while the principles of the combustion air used in line to recover gas, gas Herd policy during the adjustment mode. Advantage of this adjustment method is accurate, static and dynamic location of the gas is fully mixed with air, full combustion of good flame stability, and tempering off less likely to occur. 3.3 Dynamic line detection components, safe and reliable operation of the burner adjustment mode electronic load regulation may be achieved by a dynamic online self-test program controller ETAMATIC. CPU double voting, in each operating state of the electrical component to pass 5mA current, line detection, immediately close the valve once problems are detected, the burner off, in line with the International Electrotechnical Committee standard and fail-safe controller applied to a combustion control system security hardware and software requirements. Having a fault recording function, a fault code can be displayed through the window, to facilitate operation and management personnel to identify problems, and rapid troubleshooting. Flame detection system comprising a burner and a flame scanner flame amplifier board, constituted by the two flame detectors detect a dual redundant circuit, which receives the flame through the bottom of the glass sphere light wave band to be detected light, more secure. 3.4 Dual fuel supply system safety and reliability of the fuel supply line having a solenoid valve is opened quickly and fast turn-off characteristics, the upper end of a gas solenoid valve adjusting screw through the adjusting bolt height adjustable valve opening degree change rate of gas. When the solenoid valve is energized, the valve is opened by a magnetic force while pressing the spring, the valve de-energized by the force of the spring quickly reset. Double solenoid valve between the gas leak detection with a pressure switch, the programmer detects the dual solenoid valve is sealed tight, relatively straightforward, accurate, safe, to achieve fault location, to avoid the result of valve leakage when the ignition deflagration phenomenon, and easy maintenance. Pressure regulating valve equipped with high and low voltage cut-off function, a large pressure range, fitted with automatic emission device that can prevent the occurrence of the pressure regulating valve after tempering. With flexible joint gas path, improves security. Electronic management linkage type combustion oxygen and 3.5 Frequency adjustment techniques in digital-based electronic control combustion in conjunction with the traditional mechanical linkages manner compared with the advantages of high precision, high reliability and low cost. Variation amount of a fuel and air closure precisely controlled by digital bus manager burner. By controlling the frequency of the burner fan, can reduce power consumption and reduce operating noise level of the burner at partial load. Oxygen adjustment module by monitoring the oxygen content of the flue gas, the signal is fed back to the combustion manager promptly by the combustion manager issues an instruction to correct the amount of intake air, thereby ensuring adequate combustion under the premise of maintaining at a low excess air ratio the purpose levels. Since the excess air is reduced, so that the efficiency of the entire boiler system upgrade, to save energy. Application Conclusion new energy-saving burner technology ensures intrinsic safety and energy saving operation of high-pressure steam injection thermal recovery boiler, the introduction of advanced control and management philosophy, to provide the basis and reference for the management and improvement of existing processes. Should analyze the effects of various brands burner running applications currently on the steam injection boiler By contrast, most preferably by type of fuel for heavy oil thermal oilfield development of energy-saving burner technology to guide future selection of new boiler burners, improving injection boiler thermal efficiency, reduce energy consumption and heavy oil recovery costs.
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