Is a gas boiler an open flame device? What does it mean to use a gas open flame

Be. 1. What is open flame equipment?

Open flame equipment refers to the heating equipment and exhaust gas incineration equipment where the combustion chamber is connected with the atmosphere and there is an exposed flame under abnormal conditions. The fire distance between "open flame equipment" and other equipment and buildings.

It is compared to "control rooms, cabinet rooms, substations, laboratories, offices" and other places where open flames and sparks are generated.

Open flame equipment mainly refers to fire heating furnaces, waste gas incinerators, ethylene cracking furnaces, etc.

Second, the introduction of gas boilers.

Gas boilers can be regarded as open flame equipment that increases the criterion of fire spacing.

Under abnormal circumstances, the flame of the combustion boiler may be exposed, or the surface temperature of the red-hot parts may exceed the ignition temperature of flammable substances in the area, which can be regarded as an open flame equipment that increases the fire spacing criterion.

Gas boilers can be regarded as open flame equipment that increases the criterion of fire spacing.

1. Meaning of open flame equipment:

Regarding open flame equipment, GB50160 is defined as follows: heating equipment and exhaust gas incineration equipment where the combustion chamber is connected to the atmosphere and there is an exposed flame under abnormal conditions.

2. Precautions when using:

1. When the gas pressure of the gas boiler is too high or too low, the wind pressure is too low, the ignition flame and the main burner flame are extinguished, the boiler steam pressure is too high, the boiler water level is too low, the blower or induced draft fan is faulty, the power outage, etc., the automatic quick shut-off valve should cut off the gas supplied to the boiler.

2. If the gas is not cut off immediately, because the furnace is in a hot state and continues to take in, there may be a "flameout**" accident. Or when the furnace is not ventilated or the furnace cleaning time is insufficient, re-ignition will cause an "ignition**" accident.

3. Especially in the process of boiler operation, the sudden power failure, the automatic quick shut-off valve does not cut off the gas in time, and the accident is more likely to occur.

The special purpose of gas open flame means that the open flame can be seen intuitively, and the flame has a certain height.

Its main working principle is to use the combustible gas that can be released.

The active nozzle allows the gas to burn continuously by means of ignition. This method of combustion, which is carried out by releasing combustible gas, is the most common combustion method on the market today. Under normal circumstances, as long as the gas is blocked, the fire source will disappear automatically.

Types of open flames:

Furnace fires, candle flames, welding fires, smoking fires, fires caused by impact friction, and sparks from motor vehicle exhaust pipes are open flames. Fire is a strong oxidation reaction that takes place during the combustion of a substance.

Its energy is released in the form of light and heat, which produces a large number of products. The visible part of the fire, called the flame, has a different shape with the vibration of the particles, and can appear in the form of plasma when the temperature is high enough.

Fire must have combustibles, high enough heat or temperature, and oxidizer to make a fire, all of which are indispensable, according to the law of conservation of mass.

The lack of fire does not cause the atoms of the burned object to disappear, but only through chemical reactions.

Changed the molecular form of the combustible combustible. When a fire gets out of control, it is often referred to as a misfire or fire.

Foreign gas uses other materials to produce an open flame, which should be on the side of gas, and if there are other materials, it will meet the open flame and be natural.

Natural gas boiler burners are made up of a variety of materials. Among them, the main materials include the following:

Stainless steel: Stainless steel has the characteristics of corrosion resistance, high temperature resistance and high strength, so it is often used to make the shell and part of the internal structure of the combustion tung seller.

Aluminum alloy: Aluminum alloy has the characteristics of light weight and good thermal conductivity, so it is often used to make heat sinks and part of the internal structure of burners.

Aluminosilicate ceramics: Aluminosilicate ceramics have the characteristics of high temperature stability and corrosion resistance, so they are often used to make parts such as combustion chambers and nozzles of burners.

Copper: Copper has the characteristics of good thermal conductivity and corrosion resistance, so it is often used to make part of the internal structure of the burner and the connecting pipes and other parts.

In short, there are many kinds of materials for natural gas boiler burners, and the same materials play different roles in the burner, which jointly ensures the normal operation of the burner.

No, in a confined space, it doesn't count.

Small gas hot water boilers are not special equipment, large ones are, and they should be checked regularly.

Special equipment refers to boilers, pressure vessels (including gas cylinders, the same below), pressure pipelines, elevators, lifting machinery, passenger cableways, large-scale amusement facilities and special motor vehicles in the field (factory) that involve life safety and are more dangerous. Among them, boilers, pressure vessels (including gas cylinders), and pressure pipelines are special pressure-bearing equipment; Elevators, lifting machinery, passenger ropeways, and large-scale amusement facilities are special mechanical and electrical equipment. In November 2014, the General Administration of Quality Supervision, Inspection and Quarantine of the People's Republic of China announced the newly revised "Special Equipment Catalogue".

Whether the special equipment of the gas hot water boiler depends on the outlet temperature of the hot water boiler and whether the hot water is under forced pressure?

If it is a pressure hot water boiler, it is a regulated special equipment that needs to be inspected regularly.

If it is not pressurized, the atmospheric hot water boiler is also a special equipment, but the manufacturing of atmospheric hot water boiler is supervised, and the use management is not supervised and does not need regular inspection.

From the interpretation of special equipment, it does not belong. But it is still a product of the boiler industry.

The burner of a gas boiler is not a special equipment, but it is also subject to supervision, especially under the current environmental protection premise.

1. The burner must be tested for type, and the burner without the type test report shall not be produced and put into the market. The basis is: "fuel (gas) burner type test rules" (TSG ZB002-2008) and its modification list.

2. The efficiency value of the burner must conform to the latest national policy. The basis is:

No. 113 of 2016.

The General Administration of Quality Supervision, Inspection and Quarantine on the issuance of the "Boiler Energy Conservation Technical Supervision and Management Regulations" No. 1 Amendment Order, the target value of boiler thermal efficiency of natural gas boilers is 98%, and the limit value is 92%, which shall not be lower than this number.

Before buying a burner, you must determine these two things, otherwise the special inspection institute will not accept the boiler and other unknown matters, you can consult your local special inspection institute.

If you compare the cost, oil-fired boilers burn money, and gas-fired boilers burn natural gas;

In terms of heating effect, under the same conditions, the heating of a 5000-square-meter building is 20, the gas boiler can reach the temperature after 2 hours of burning, and the heating temperature can be reached by the oil-fired boiler for 4 hours.

Oil-fired boiler is a kind of combustion equipment that uses an oil burner to atomize fuel oil, and strongly mix it with air to burn in suspension in the furnace. The oil burner is the key equipment of the oil-fired boiler. At present, most of China's oil-fired boilers with large capacity use heavy oil, due to the high viscosity of heavy oil, they must be preheated in advance before they can be transported and used in pipelines; Most of the smaller ones are burned with light oil and do not need to be preheated.

Most industrial oil-fired boilers use light diesel.

A boiler in which a mixture of gas and air is suspended in the furnace chamber and burned is called a gas boiler. The gaseous fuels commonly used in gas boilers include natural gas, coking gas, blast furnace gas, chemical tail gas, and mixture of liquefied petroleum gas and air.

Although there is only a word difference between oil-fired boilers and coal-fired boilers, the fuel used is different, and the cost is different.

1. Operating costsMost users who choose boilers value the level of the operating cost of the boiler in the later stage, and the oil-fired boiler has a certain advantage in the operating cost, which is a relatively economical product.

2. High thermal efficiencyThe thermal efficiency of oil-fired boilers is more than 92%, and the improvement of thermal efficiency can shorten the working time, reduce consumption and save energy in operating costs.

3. Low pollutionIn the country, we vigorously advocate the policy of environmental protection and energy saving, green and efficient, and oil-fired boilers are environmentally friendly products.

4. Easy to operate: The oil-fired boiler has a computerized control cabinet, which makes it easier to carry out the comprehensive operation of the boiler.

5. AppearanceAccording to the reasonable design, the oil-fired boiler has a certain advantage in appearance and small size.

1. Operating costsThe main factors affecting the operating cost are gas costs, water and electricity costs, labor wages and other components, and the fuel cost in the same tonnage is half of that of coal-fired boilers than oil-fired boilers, and the fuel costs are relatively low.

2. Thermal efficiencyThe thermal efficiency of coal-fired boilers is more than 77%, which greatly reduces the advantages compared with oil-fired boilers.

3. Environmental protectionCompared with oil-fired boilers, coal-fired boilers are not as polluting as him, and there are certain disadvantages.

4. OperationCoal-fired boilers, like oil-fired boilers, are mechanically controlled in terms of operation, and the boiler is fully operated.

5. AppearanceCoal-fired boilers occupy a small area in appearance, are convenient to transport, have a short installation period and low installation costs.

From the above situation, oil-fired boilers have lower operating costs, are more environmentally friendly than coal-fired boilers, and have higher thermal efficiency, but oil-fired boilers are definitely more expensive.

WMS type ultra-low nitrogen oil-fired gas boilerThe boiler with ultra-low nitrogen environmental protection has greatly improved the shortcomings of the old horizontal internal combustion furnace with complex operation and substandard flue gas emissions, and the nitrogen oxide emission is less than 30mg m3, which meets the market demand and applies the new environmental protection policy.