This chapter Xiao Bian gave you these three cases is the number of natural circulation water tube boilers are air consumption: regular manufacturers of 6 tons of gas boiler is a standard, rated steam pressure of 6 tons of gas boiler is 1.6MPa, rated steam temperature 204 ℃, the thermal efficiency is depending on the manufacturer's technical standards and different, according to well-known manufacturers Henan party fast factory technician stated that its company produces thermal efficiency of 6 tons of natural gas boilers up to 95%, may in some do not understand the line the customer's eyes, a few percent is not obvious, but once put on the industry able to have a very large customers to reduce fuel costs per year, compared to the technology in terms of well-known manufacturers chose better. Closer to home, gas boiler according to the air consumption parameter table displayed on the technical side of Henan fast calculation formula, a calorific value parameter is gas 35438KJ, and the consumption of natural gas boilers is 75 cubic meters per ton, if it is, then the consumption of the boiler 6 t 450 cubic meters, while gas-fired air consumption are calculated by the hour, so air consumption summary, six tons of gas boiler is 450 cubic meters per hour.
Hefei is the blue sky to win the Battle of key areas for innovation to create an international influence is of great significance. Is determined to win the battle of the blue sky, the city combined with the actual situation, formulate a three-year action plan to win the embodiment Battle of blue sky. Details are as follows.
I. Target: 2020, sulfur dioxide, total nitrogen oxide emissions were reduced over 23.1% in 2015, more than 24.2%; PM2.5 concentration decreased more than 18% in 2015, the ratio of the number of days air quality assessment requirements up to the national , severe pollution and over several days ratio decreased by more than 25% compared with 2015; the full realization of "thirteen five" binding targets.
Second, the continued implementation of the total coal consumption control. By 2020, the city's coal accounts for a further decline in the proportion of total energy consumption; the city's total coal consumption to complete the tasks assigned by the national and provincial; new coal projects to implement the reduction of coal instead.
The development of special programs, shutting down vigorously eliminate environmental protection, energy consumption, safety and other 300,000 kilowatts coal-fired units of non-compliance. For shutting down the unit's capacity, coal consumption and emissions targets, allowed to trade or replacement may be within the total national and provincial construction plan developed according to the control range, co-ordinate arrangements for the construction of ultra-low emission coal-fired capacity unit.
Third, the implementation of the "coal to gas" and "electricity instead of coal." Under the premise of the implementation of the gas source, protect people's livelihood, ceramic, glass, foundry industry to actively promote natural gas instead of coal gasification project, orderly implementation of coal-fired facilities from coal to gas. Combined with regional and industry characteristics can actively promote industrial production, building heating and cooling, transportation, agricultural production, the implementation of the residents living in five major areas "electricity instead of coal", focus on improving the proportion of final energy consumption of electricity accounted for. Of the new "coal to gas" projects, we should adhere to increase coal gas reduction to gas will change under the premise signed gas supply contracts, orderly implementation.
Fourth, to carry out comprehensive improvement of coal-fired boilers, coal-fired boilers to increase efforts to eliminate, consolidate the results of coal-fired boilers eliminated. Coal-fired boiler (with tea furnace, operating a stove, grain storage and drying equipment, coal-fired facilities) carried out an intensive investigation, one by one registration. The city basically eliminated 35 tons of steam per hour of coal-fired boilers and furnaces tea, operating the stove, grain storage and drying equipment, coal-fired facilities, no new 35 tons of steam per hour of coal-fired boilers; 35 tons of steam per hour and coal-fired boiler above (except boilers fired power plant) all meet special requirements emission limits; allowed to remain 65 tons of steam per hour coal-fired boiler and above all the complete energy transformation and ultra-low emissions within the city. County (city) district, zone one by one before the end of June 2019 to develop low-nitrogen combustion rehabilitation programs for existing gas boiler, complete combustion of low nitrogen transformation in this area of existing gas boiler before the end of 2019 more than 50%, before the end of 2020 transformation is substantially complete; after transformation principle NOx emission is not higher than 50 mg / m, and comply with appropriate safety boiler specification. Urban built-up area of ultra-low emission biomass boilers implement reform.
(2) The ignition temperature rises, and the initial temperature rise and pressure increase is slow. Generally, the time from the initial boost to the working pressure is about 3~4h, and the water level gauge should be flushed during this period. At the same time, observe whether the pressure gauges on both sides of the steam natural circulation water tube boiler are consistent, and check whether there is any leaking steam at the inlet.
Furnace pressure Gaoyao what measures the phenomenon 1, high pressure natural circulation water tube boiler furnace alarm. 2, DCS furnace pressure is abnormally high. 3, the chamber is not tight at the gray smoke, Mars. 4, the furnace pressure is higher than 1960kPa, MFT operation. Reason 1, induced draft fan vanes, baffles false import and export clearance. 2, the milling system is not working properly. 3, the local detonation combustion instability. 4, furnace pressure automatic control failure. 5, the flue baffle erroneous off, the flue gas flow decreases through. 6, the boiler heating surface squib. 7, the induced draft fan trip, the corresponding side of the blower is not tripping. 8, a trip desulfurization booster fan. 9, the automatic air supply failure, sudden increase in the degree of opening. 10, out of focus. Now normal furnace pressure adjustment process 1, such as furnace pressure value is not reached the MFT. 2, the automatic control furnace pressure failure, immediately cut automatic and manual adjustment, the adjustment process to guard against the fan surge. 3, the system for wind smoke flap check recovery. 4, Fan trip, corresponding to the non-tripping side fan, the blower immediately outage. 5, on the other causes a high furnace pressure, furnace pressure should be quickly adjusted properly.
Therefore natural circulation is limited to boiler with drum operating pressure around 175 kg/cm2. #2.Controlled Circulation In Boiler: If the Operating pressure of boiler is between 180 kg/cm2 to 200 kg/cm2 then circulation in boiler is to be assisted with mechanical pumps, to overcome frictional losses.Get a Quote
Natural circulation high pressure steam boilers type HPB Steam output 300 8,000 kg/h. This type of boiler is a variant of the water tube steam boiler and is very well suited to the generation of steam with higher pressures. These boiler systems are very space-efficient due to their vertical design.Get a Quote
Fire-tube boiler - Wikiped. A fire-tube boiler is a type of boiler in which hot gases pass from a fire through one or (many) more tubes running through a sealed container of water. The heat of the gases is transferred through the walls of the tubes by thermal conduction, heating the waterGet a Quote
147 The Circulation of Water and Steam in Water-Tube Boilers, and the Rational Simplification of Boiler Design By W. Yorath Lewis, M.I.Mech.E.,* and Struan A. Robertson, B.Sc. (Eng.)? The authors stress the need for a sound theory of circulation in water-tube boilers, to enable weight and space to be saved and efficiency and reliability to be increased.Get a Quote
Corner Tube Boilers. The ERK (corner tube) Boiler is a modern, natural-circulation, single drum water tube boiler. The main characteristics are a very active water circulation, rapid load change capability, light-weight construction and self-supporting structure.Get a Quote
This program is HAD-CR_T, a program for calculating the natural circulation ratio of a detailed water tube boiler. The results of each pipe and section show the variation of the water / steam quantity, velocity, and property of each section, the circulation ratio, and the pressure drop, and the variables of the two-phase fluid and critical heat flux for each section can be calculated.Get a Quote
Natural circulation is caused by the density difference between saturated water and heated water partially filled with steam bubbles. In a natural circulation unit the water tubes are connected to a loop, Fig. 4.3.Heat is applied to one leg, called the raiser tube, where the watersteam mixture flows upward.Get a Quote
Factory assembled natural circulation water tube boiler designs Completely drainable convective superheater operates at lower gas side temperatures to extend superheater life Two-stage convective superheaters dramatically improve performance over turndownGet a Quote
2017-5-27 · A.Natural circulation of the water in the water tube boiler is better than that in the fire tube boiler. B.For the same output the water tube boiler will carry less mass of water compared with the fire tube boiler. C.The water tube boiler will cost shorter time for steamGet a Quote
Water tube boiler parts and their functions. There are many pressure parts and non pressure parts in a water tube boiler we only discuss main water tube boiler parts and function. Steam drum. Steam drum is a collection vessel for steam & water. Here water & steam is separated. It has steam separators.Get a Quote
This natural circulation is called thermosiphon system. The steam generated gets collected in the steam space above water space in the boiler drum. In order to remove all water particles from the steam, it is finally through the superheating. The superheated steam is then available for use. Special features of water tube boiler:Get a Quote
Working Principle of Water Tube Boiler . The working principle of water tube boiler is thermal siphoning (circulation of natural water). Basically, this type of boiler includes two drums namely steam, lower or mud drum. The water tube boiler diagram is shown below, and these two drums are associated via two tubes such as downcomer and riser. AtGet a Quote
2013-7-5 · 1 Natural Circulation Boiler -Type iNook CLOSED CIRCUITS SCHNEIDER-KESSEL BERLIN ® STEAM-BOILER and HOT-WATER BOILER INTEC Sales Meeting June 26 th - 28 th 2013Get a Quote
0.25T/H 250Kg/H Natural Circulation Steam Boiler for Cosmetic Industry, US $ 2000 - 15000 / Set, New, Natural Circulation, Industrial.Source from Shanghai Yano Boiler Manufacturing Co., Ltd. on Alibaba.com.Get a Quote
2009-1-23 · This paper assesses boiler tube failures (BTFs), especially in boiler water wall tubes (BWWTs) for a natural circulation high-pressure fossil (natural gas) drum boiler unit (TIME-COB-206, Russia). Metallographic (micro and macrostructural) examinations of BWWT s materials (carbon steel, Russia) were carried out extensively .Get a Quote