automatic horizontal style steam boiler of china

automatic horizontal style steam boiler of china

A few days ago, Datong City, Shanxi Province, issued a "decisive battle 300 days, to enhance the" Datong blue "plan", combined with ongoing Shanxi Province: innovation, work for "the great debate, promote green development, and constantly improve the level of ecological civilization, achieve a good number of days 300 days throughout the year for more than two goals. details are as follows.

1, aspects of the transition. On the basis of the regulation last year, continued to carry out "dirty scattered" enterprise rectification work. According to industrial policy, industrial layout planning, as well as land, environmental protection, quality, safety, energy consumption, etc., to carry out an intensive investigation, the establishment of management accounting. In accordance with the principle of "first stop after the rule", the implementation of classification disposal, have been banned "dirty messy" business, appears to prevent the resurgence of the phenomenon.

2, corporate governance aspects. Industrial pollution discharge standards to strengthen the comprehensive management of enterprises can not achieve full compliance, should be taken to stop production remediation. Full completion of key industries pollution remediation work, on the basis of the city's nine power companies that run on ultra-low emissions stable, GD Datong Power Generation Co. Ltd. within the scope of the built-up area of ​​the city and Datang International Yungang Thermal Power Co., Ltd. completed before the end of the colored Amidst the governance feasibility report, we lay the foundation for next year colored misty rain governance. December 30, 2019, to carry out ultra-low emissions and chemical industry, iron and steel, nonferrous metals, cement industry, especially emission limits transformation; completed 100 industrial enterprises fugitive emissions control, industrial furnace control 41 upgrades, 11 key industries and enterprises volatile organic compounds governance and four key industries and enterprises volatile organics management upgrade.

3, less coal ways. Insist on proceeding from reality, should be in accordance with the electric power, gas should the gas, should the coal coal (ultra low emission), should be hot is hot, and more heating energy policy to ensure the safety of the masses warm winter. Residents living coal simultaneous implementation of clean energy alternatives. District heating flat built-up area clean 100% coverage, coverage of other counties clean heating built-up area of ​​more than 70%, 40% or more in rural areas, to proceed with the phase-out of coal-fired boilers. Renovation project to carry out ultra-low emission coal-fired boilers, October 1, 2019, 65 tons of steam coal and above and build the region (biomass) and energy-efficient boilers to complete the transformation of ultra-low emissions, low nitrogen gas boiler basically completed the transformation.

New boiler, gas or coal-fired choose? Many users in the selection of a new boiler, there are a lot of doubts. For example, choose to use the more common coal-fired boilers do? Or the use of cleaner gas-fired boiler it? Xiao Bian from the following aspects to compare your focus to help you better understand the boiler equipment.

Fault which the boiler safety valve 1, a valve leak:, valves and valve seat sealing surface of the medium boiler safety valve leakage occurs exceeding the allowable level in normal working pressure, will continue to leak medium of the hard sealing material destruction. Therefore, the working medium is the steam valve, at a predetermined pressure, if the outlet end invisible to the naked eye, it can not find a leakage, the sealing performance is considered acceptable. 2, the valve body joint surface leakage: the upper and lower valve body at the binding surface leakage, leakage of the main reasons for this are the following aspects: a, the bolt tightening force bonding surface or tight enough bias, resulting in poor bonding surface sealing surface. b, in conjunction with the toothed surface of the valve gasket does not meet standards. c, the boiler safety valve in conjunction with the valve body surface flatness bad or hard cause seal failure impurities stayed pad. 3, the operation of the rear main valve impulse valve does not operate: this phenomenon is commonly referred to as tripping of the main valve. The main safety valve tripping seriously affect the safe operation of the equipment also could result in a major accident. 4, the rear main impulse valve back seat back seat valve delay time is too long: the main cause of such a failure has the following two aspects: on the one hand: a large amount of steam leakage chamber of the main valve piston or smaller, although the impulse valve back seat, but still in line with the pressure of the steam piston chamber is still high, pushing the piston downward force is still great, so causing the main valve back seat slow. Eliminate this failure, mainly through large open throttle valve opening and the orifice diameter is increased to be addressed, the throttle valve opening and the throttle aperture opening increases are big steam left in the pulse tube quickly drained , thereby reducing the pressure in the piston, so that acting on the piston downward thrust rapidly decreases, the spool valve effect of its own spring tension set up in the steam box with steam medium upward thrust rapidly back and under the main seat. On the other hand: Method friction between moving parts and fixed parts of the main valve is too large will cause the main valve back seat sluggish, it is to solve this problem with the gap of the main safety valve moving parts and fixed parts of control within the standard range. 5, low back seat pressure safety valve: safety valve reseating pressure is very low harm operation of the boiler, back seat pressure is too low will cause a lot of media time-out emissions, resulting in unnecessary energy loss. This failure occurred in the pulse valve springs A49H 200MW unit used to analyze the reason is mainly caused by the following factors: a, a large amount of steam drain valve spring pulses, this form of impulse after the valve is turned on, the media continue to discharge, pushing the main safety valve. B, the valve spool and the guide sleeve with the gap inappropriate, with the gap is too small, after a start impulse valve seat formed in this part of the instant high kinetic energy pressure throttle area, raise the spool, a delay seat back time, when the vessel to a lower pressure zone to reduce the kinetic energy of the pressure impulse valve seat back. A method to eliminate this failure: Check valve body and the guide sleeve dimensions of each portion, with the gap is too small, straight reduced valve flap valve sealing surface a vapor barrier or cap diameter increasing radial clearance between the valve flap and the guide sleeve, will not be increased excessively throttled flow area of ​​the portion of the steam flowing through, forming the partial pressure increases the kinetic energy of a high pressure zone. Another reason making: All moving parts friction force, some parts of a jam, the solution is to carefully check all moving parts, strictly in accordance with maintenance standards for maintenance of the various components, with each component of the gap adjustment to the standard range, eliminate jam possibilities. 6, the safety valve chatter: jitter safety valve appear in the discharge process, called safety valve chatter, chatter occurs easily cause metal fatigue, mechanical performance of the valve drop, causing serious equipment problems, the reason is quite vibration occurs mainly in the following aspects: one is the improper use of the valve, selection of valve discharge capacity is too large (relative to the emissions must be concerned), the method is to eliminate the valve should make the choice rated displacement required emissions equipment as close as possible. Partly because the inlet pipe diameter is too small, smaller than the diameter of the valve inlet, the inlet pipe, or too much resistance, a method to eliminate the valve is installed in the inlet valve tube inner diameter not less dry or reduced inlet diameter inlet conduit resistance. Discharge pipe resistance is too large, resulting in the discharge excessive back pressure valve is caused by a factor chatter, can be addressed by reducing the resistance of the discharge pipe. 7, the safety valve frequency jump: jump frequency refers to the valve back seat, until a slightly elevated pressure, turn relief valve to open, repeated several times occur, a phenomenon known safety valve "frequency hopping." When the mechanical properties required safety valve safety valve reaches a predetermined opening height in the whole course of action, not allowed jamming, tremor and frequency hopping phenomenon. Frequency hopping phenomenon occurs sealing valve is extremely unfavorable, easily causing leakage sealing surface. Analysis of the main reasons the valve back seat pressure is too high related to the back seat pressure is high, medium, low emissions excess of the vessel, the safety valve has a back seat, when the operating personnel to adjust properly, pressure inside the container will soon It rose, it also caused the safety valve, as the case may be eliminated by the method to open a large degree of throttle opening. After the throttle opening large, source to the main steam safety valve piston chamber decreases, a smaller push the piston downward movement of the force, the less likely the main safety valve, thus avoiding the main safety consecutive starts.

By the economizer boiler body + + + condenser condensing gas boiler auxiliary boiler composition; auxiliary equipment mainly includes: a control cabinet, a burner, supply pump, condensing circulating pump, an economizer, sub-cylinder, chimneys and the like.

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