Common forms and functions of household gas boilers What? Eyes looking at the winter to come, even a little bit cold in the morning, consider the division of winter heating, radiators and underfloor heating is still the most of my friends were like, whether it is considering radiator, is still considered to warm, in selected household heat source division, the boiler is not open around a big problem regarding a lot of terms is a boiler plate replacement, the machine casing, dual furnace, the furnace system, stainless steel, cast aluminum, is really incomprehensible. Today it is concerned about several different approaches boiler it only in the discussion of domestic gas boilers. Domestic boilers divided by FunctionClassification: dual furnace, the furnace system according to the preparation of a hot day separable way to catalog: telescopic, replaceable plate, Double-tube, coil type heat exchanger tank by combustion approach can be divided into: general type, condensation type, general type premix, premix condensing type to start from the beginning of the function classification, dual oven is heating / hot water dual-use furnace day, you can put the fantasy of dual-use furnace into two water heaters, a as heating, hot water a day served. Furnace system, the same day warm hot water to meet the needs of mining, but the furnace system, the system can not take direct hot day, will need to work a coil hot water tank to meet the day. Preparation of Hot Press day classification approach: the sleeve is more common board for boilers and boiler, Double-tube boiler tank and a heat exchanger coil boiler is not common. Tube boiler: the market still find many, operation principle is similar to gas water heaters, water enters the main heat exchanger, a boiler heating the board for a flame to obtain hot day. The so-called sleeve means its main heat exchanger, and the day of the hot water circuit loop approach Pipe sleeve tubular heating sleeve together, simple structure, low cost, low failure rate. Machine main heat exchanger casing of this disadvantage sleeve machine being characterized by a tubular sleeve so large pipe, the hot water is always heated days, when the winter heating hours, days open water, in the form of heating boiler is switched from the hot water to form days , out of the top section of the water temperature will be very high, there is a potential risk of burn people. And the structure of its resolution casing machine power is not too large, usually 18kw to 24kw. Board for boilers: boiler plate for comparison on the market now is the mainstream model, to change the boiler plate for heating hot water in the form of day, and adds a three-way valve and plate heat exchangers, the stability of such hot water progress, very comfortable with them. Premix condensation furnace: furnace premix combines the advantages of condensing premix boilers and recovery boiler flue gas, the thermal efficiency can reach about 98% -110%, with a minimum power boiler can reach about 2-5kw, improved energy efficiency . The premix condensing furnace is not directly applied in a boiler condensate return tank, but directly to the main heat exchanger of the boiler is increased, to increase the heat exchange area, so that the direct condensation of flue gas in the combustion chamber. Premix condensing furnace production process each manufacturer has a different, unlike the switch plate has been immobilized, but the fan frequency, accurate scheduling gas proportional valve, the main heat exchanger against corrosion that is required several standard accessories. Fume recovery boiler: low temperature into boiler return water condenser tank, high temperature flue gas also enters the condensate tank, the two heat exchange, heat exchange efficiency of the boiler can reach 97% As mentioned above, natural gas-fired comes mostly methane there is also a hydrogen sulfide, hydrogen sulfide from natural gas by deodorant. In the high temperature combustion of hydrogen sulphide attack sulfur dioxide, nitrogen in the high-temperature air generated nitrogen oxides, and the condensate tank will decrease the flue gas temperature, flue gas water vapor was separated in a liquid approach, reaction of water with sulfur dioxide and nitrogen oxides produced sulfite , nitrous oxide, sulfuric acid becomes about nitrate and corrosive, relatively poor corrosion condenser tank simple. Another problem is the problem of fouling of the furnace flue gas condensing recovery, because the presence of fouling by air, moisture condensed out of the box, can cause the dust adheres on the boiler main exchanger. General premix Oven: fan such boilers are converted, depending on the boiler board computer to schedule power boiler gas boiler intake air, the fan speed with the scheduling boilers, gas and air control in a very appropriate proportions into the combustion chamber combustion, thermal efficiency progress. This progress boiler thermal efficiency of the boiler, but do not attack the condensate water, but because the use of variable frequency fans, the price relative to the average furnace will be higher, but because of his air volume ratio and the amount of gas is very suitable, so nitrogen oxide emissions basically amount can be qualified, basically as long as this stove can get blue sky in the oven so that the general standard. With such machines because the use of air blower frequency, minimum power boiler can be made smaller.

Cade Shopping Mall is located in central Shanghai Hongkou District, Shanghai Daily larger flow of people in the region. The introduction of Shanghai air pollutant emission standards, boiler flue gas emissions of nitrogen oxide emissions to less than 80 mg / m, Shopping Mall a coal-fired boilers have been used for many years, NOx emissions far super to this request, the urgent need to replace more environmentally friendly low nitrogen emission boilers. Other units through the use of fast Boiler introduction and understanding, determined and fast boiler to achieve cooperation, party fast to their specific needs to recommend one condensing gas hot water boiler of a 4.2MW for heating needs of the shopping center.

Off-firing boiler gas is a combustible gas in the combustion rate is higher than the outlet speed generated during combustion, resulting in the original direction of the fuel toward the burner starts combustion, and the gas boiler is in operation when the low-load state , is more prone to fire off phenomenon.

External structure of the boiler room layout problem to note 1, leading to the boiler room outside the doors should open outwards. Each boiler room should be at least two outlets, are provided on both sides. When the total width of the front end of the boiler (the boiler comprises a passage between the inner) of not more than 12m, and a boiler room area not exceeding 200m2 single boiler room and to be open only one outlet. 2, the boiler room door should not be used on a pull-down shutter doors or sliding door, single evaporator rated less than or equal 2t / width and height h of the boiler door homeowners boiler boiler assembly generally not less than the maximum dimensions plus 0.5m . 3, the ground should be flat boiler room without a step, no water in the boiler room floor drain hole (groove) should be set up at, to facilitate drainage. 4, boiler room should comply with building "architectural design code for fire protection" and "design of tall buildings for fire protection" requirements. 5, between the boiler wall (1.5 meters or less from the ground) should adopt cement plaster or tile veneer moisture protection and to facilitate washed with water. 6, boiler room operation site, as well as water gauge, pressure gauges, thermometers, flow meters, etc., should have adequate lighting. 7, operation of the boiler room should be open layout, and boiler water, boiler pressure measurement and control instruments concentrated in the operating room, and boiler and safety accessories should be reliable rain, wind, frost, anti-corrosion measures. 8, located in the wood workshop, no fireproof partition wall of the boiler, the application of non-combustible material, fire resistance of 4h material masonry firewall, the firewall directly on the basis of the masonry or reinforced concrete frame, the firewall should be cut off burning body or difficult to burn the roof structure, the roof and the body should be higher than 400mm non-combustion, combustion or higher hard body burning roof 500mm.