Electric boilers are a type of boiler equipment that uses electrical energy. According to different output media and uses, electric boilers can be divided into electric boiling water boilers, electric drinking water boilers, electric tea water stoves, electric tea stoves and so on.

Electric hot water boilers are also called electric heating boilers, electric heating boilers, electric heating boilers, electric bath boilers, electric bath boilers, etc. Electric hot water boilers are hot water produced using the latest electric heating technology and control systems designed to meet heating or supply life, Fully automatic environmental protection boiler for hot water for bathing. This type of boiler is widely used in domestic hot water and heating in places with high appearance requirements such as hotels, villas, factories, office buildings, government agencies, universities, hospitals, and troops; at the same time, this type of boiler is also the star of Fangkui boiler manufacturers. product.

According to different structures, electric boilers can be divided into two types: direct-heating electric boilers and regenerative electric boilers. As the name implies, direct-heating electric boilers will not be explained here any more. Regenerative electric boilers are based on electricity The department encourages the use of electricity for heating during the trough and enjoys preferential electricity prices. It has introduced a new type of energy-efficient electric heating products.

The regenerative electric boiler is equipped with a regenerative hot water tank and ancillary equipment to form a regenerative electric boiler system. The hot water in the regenerative water tank is used for heating to achieve the goal of using all or part of the valley power. Electric steam boilers are also called electric steam boilers. Electric steam boilers refer to steam boilers that use power to heat and generate rated pressure.

Electric steam boilers can be used for textiles, printing and dyeing, papermaking, food, rubber, plastics, chemicals, medicine, steel, metallurgy and other industrial products processing process steam; and after the configuration of heat exchangers can also be used for enterprises, institutions, hotels, schools , Heating, bathing, air-conditioning and domestic hot water in catering, service and other industries.

Gas boilers have many applications in cold season heating and industrial production. Gas hot water boilers can output high temperature hot water, while gas steam boilers can continuously provide high temperature and high quality steam. In order to make our gas boilers better serve us, we must arrange regular cleaning procedures for the boilers to avoid boiler failures. Why is cleaning a gas boiler a necessary process? Let's take a look with the Fangkuai boiler manufacturer!

First, prevent scale accumulation
       Gas boilers require a large amount of water supply during use. These waters are not completely pure water, but water containing some impurities. When these waters are heated for a long time, a lot of scale will be generated. This is because the water contains Calcium sulfate decomposes in a high temperature state and combines with calcium and magnesium ions to form scale. If a large amount of scale is accumulated in the boiler, it is very likely to cause different degrees of corrosion to the bottom of the boiler.

Second, improve the safety of the boiler
       The importance of the gas boiler determines that if the necessary cleaning work cannot be performed on the interior of the boiler, it will greatly affect various safety indicators of the gas boiler in the production process. This is mainly because those scales will cause the temperature of the water-cooled wall of the boiler to continue to increase without cleaning, which greatly increases the risk coefficient of the water-cooled wall's tube explosion, which directly affects the safe operation of the boiler.

Third, reduce waste of resources
       The scope of application of gas boilers is very wide, so the number of gas boilers used is also large. However, once the cleaning work cannot keep up with the accumulation of scale, the thermal conductivity of the boiler will be greatly reduced. In this situation, in order to ensure sufficient heating capacity, only the temperature of the furnace fire must be continuously increased, that is, the consumption of fuel is increased, resulting in a waste of resources.

Generally speaking, the thorough and perfect cleaning work has played a key role in the normal operation of the gas boiler. The reasons are mainly divided into three aspects: the cleaning work can reduce the scale accumulation inside the boiler; it can also greatly improve the gas The safety of the boiler's operation avoids resource consumption and eliminates waste of resources.

Energy efficiency testing of boiler equipment is a very important and authoritative test for boiler manufacturers and customers using boilers. The test results obtained after the energy efficiency test are powerful indicators for measuring whether the performance indicators of the boiler products of the boiler manufacturer have reached the guaranteed value. In addition, it can also identify the main factors that affect the results of energy efficiency testing, and by analyzing the influencing factors, manufacturers can adjust short-term items to make the product more efficient and safe. The ultimate beneficiary of these adjustments is the customer, because the detection content such as the thermal efficiency of the boiler directly affects the energy consumption of the boiler and is related to the interests of the customer.

So what do boiler energy efficiency tests do? Zhengzhou Fangkuai Boiler Company will give you the answer.

The main contents of the boiler energy efficiency test are as follows.
       1. Boiler thermal efficiency test
       The main tests are boiler evaporation, boiler excess air coefficient detection, exhaust temperature, fuel combustion efficiency, boiler thermal efficiency test, fuel consumption, and gas-air ratio.
       2. Energy efficiency test of new boiler products
       Determine whether the various thermal performance indicators of the boiler are consistent with the design and determine the operation mode of the equipment. Such as boiler evaporation, boiler thermal efficiency, combustion efficiency, various heat losses and so on.
       3. Boiler operation adjustment test
       Determine the most economical mode of operation of the boiler, and identify defects in the operation of the boiler. Such as the maximum boiler load, minimum boiler load, fuel requirements, economic load, reasonable exhaust temperature, optimal air coal ratio, excess air coefficient, secondary air ratio and so on.
       4. Contrast test of thermal performance before and after boiler renovation
       Test changes in evaporation, effects of combustion, boiler thermal efficiency, and more.
       5. Fuel industry analysis, element analysis
       Judging the quality of fuels such as coal, oil, and gas is convenient for enterprises to control the quality of fuel entering the plant.
       6.Water quality detection and scale sample analysis
       Judge the water quality, control the boiler water index, and prevent boiler scaling.

The thermal efficiency of an industrial boiler is an important indicator for measuring the economic performance of the boiler. In simple terms, the higher the thermal efficiency of the boiler, the higher the economy, and the waste of fuel reduces the primary power consumption. How to improve the thermal efficiency of industrial boilers, or buy an industrial boiler with high thermal efficiency, has become the focus of manufacturing enterprises.

Regarding the thermal efficiency of industrial boilers, the boiler has design efficiency at the engineer design stage. Generally speaking, the actual operation is similar to the initial design thermal efficiency. For example, the efficiency of oil and gas furnaces is greater than 92%, and the efficiency of circulating fluidized bed boilers is usually higher than 88%. However, the boiler efficiency is not fixed. If your equipment is operating at a rate lower than the design efficiency, then measures can be taken to improve the boiler thermal efficiency.

Improving the thermal efficiency of industrial boilers can increase the various heat losses of the boiler by adding ineffective application heat, the focus of which is to reduce the boiler exhaust heat loss and the loss of machinery not completely extinguished. Zhengzhou Fangkuai Boiler Company will briefly explain some specific operation methods for everyone.

1.Reduce boiler exhaust heat loss
       (1) Reduce the air leakage rate of the air preheater, especially the air leakage rate of the rotary air preheater;
       (2) Strictly control the water quality target of boiler water. When the scale in the water-cooled wall tube reaches 400mg / m, it should be pickled in time;
       (3) Burn high-quality fuel with low sulfur content as much as possible and lower the air temperature at the inlet of the air preheater. The ancient large-capacity power generation boilers were equipped with air preheaters to avoid condensation on the heating surface of the cold front end of the air preheater. Incurred high temperature corrosion of the air preheater.

2.Reduce the heat loss caused by mechanical failure
       (1) Adjust the extinguishing conditions according to the boiler load and time, and reasonably distribute the air so that the fuel is fully extinguished in the furnace;
       (2) Adjust the feeding amount according to the fuel volatile content and time to maintain the optimal amount of fuel.

3. To reduce the heat loss of the boiler, not only the thermal insulation measures of the boiler itself must be in place, but also the maintenance and repair of the boiler pipes and the thermal insulation layer of the boiler must be enhanced.

Steam quality is an important indicator for measuring the overall quality of a gas-fired steam boiler. This is because many companies purchase gas-fired steam boilers directly using steam. If the steam quality is not high, it is likely to affect the entire production of the project. Process and the quality of the final manufactured item. So, how do enterprise users choose a gas-fired steam boiler with good enough steam quality?

1. Cleanliness of gas steam boiler
       There may be rust and carbonate deposits in the steam pipeline, and there may be residual welding slag and sealing material fragments during installation. These impurities will cause blockage and damage to valves and equipment, and will also increase pipeline wear. The way to improve cleanliness is to equip gas steam boilers with pipe filters to deal with these impurities in real time.

2.Dryness of gas steam boiler
       Factors such as improper water treatment for gas-steam boiler water treatment, irrational boiler level control, and excessively high peak loads for a short period of time will cause the phenomenon of co-transpiration of the boiler, causing the boiler outlet to carry boiler water. When the steam moves in the pipe, the heat dissipation of the pipe will cause a part of the steam to condense, adding condensed water in the pipe. Adding a steam-water separator is a useful way to improve steam dryness. An efficient steam-water separator can improve steam dryness to 98%.

3.Purity of gas steam boiler
       There will be air in the steam system. This is because the steam generated in the boiler still inevitably contains a small amount of air. In addition, there will also be air when the pipes and equipment are started. When the system and equipment are stopped, the air is sucked in due to the internal vacuum.

Air has a low thermal conductivity and is a poor conductor of heating. The steam system contains air, which will reduce the production capacity of steam equipment, and also increase the corrosion of pipelines, valves and equipment. The most useful way to eliminate non-condensable gases such as air in the steam system and improve the purity of the steam is to install an automatic air exhaust device in the system.

From a professional perspective, the capacity of a steam boiler is called "tonnage," and the capacity of a hot water boiler is called "power." Learn to switch between power and tonnage, you can quickly and easily understand the parameters of the boiler.

For hot water boilers, the boiler power is expressed in MW (1MW = 1000kW) or million kcal / hour (ten thousand kcal / h).

For a steam boiler, its power is also called the evaporation capacity, which is the amount of water converted into steam per hour: ton / hour (T / h) or kilogram / hour (kg / h). Of course, it can also be expressed in MW or KW.

In China, the correspondence between evaporation and power is:
       1T / h = 1000kg / h = 0.7MW = 720kW = 600 thousand kcal / h = 600Mcal / h.
       Units of power are also horsepower (Hp) and boiler horsepower (BHp).
       1Hp = 0.745kw, 1BHp = 9.81kw

In some European and American regions, the steam boiler evaporation capacity is often marked with "at 212", which means that its evaporation capacity refers to the evaporation of 212 degrees Fahrenheit of water to 212 degrees Fahrenheit, which means that the water evaporation at 100 ° C Amount of steam at 100 ° C. In this way, 1kg of evaporation is equivalent to 540kcal of heat. We call it "equivalent evaporation", that is: 1T / h = 540,000 kcal / h. It can also be deduced from this that the relationship between boiler horsepower and "equivalent evaporation" is: 1BHp = 15.62kg / h.

In boiler equipment, these parameters also have corresponding conversion relationships.
       1 ton / hour (t / h) ≈ 60 × 104 kilocalories (kcal) / hour (kcal / h) ≈ 0.7 megawatt (MW) ≈ 720K kilowatt (KW)
       2. Boiler evaporation and boiler horsepower 1 ton / hour (t / h) ≈ 71.1 boiler horsepower (BHP);
       3. Boiler pressure engineering unit and international unit of measurement 1 MPa (Mpa) ≈ 10 kgf / cm2 (kgf / cm2);
       4. Megapascals and Pascals 1 Megapascal (Mpa) = 106 Pa (pa) 1 Pa (pa) = 0.01mbar (mbar) ≈ 10-5 kgf / cm² (engineering atmospheric pressure) (kgf / cm2) 1 pa (Pa) ≈0.1 millimeter water column (mmH2O);
       5. Force and gravity 1 kgf (kgf) = 9.81 Newton (N);
       6. Calories 1 kcal (kcal) = 4.187 kilojoules (KJ);
       7. Volume (volume) 1 cubic meter (m3) = 1000 liters (L) 1 liter (L) = 1000 milliliters (ML).