For oil and gas boiler equipment, in order to improve operating efficiency, it is an indispensable way to achieve full combustion of fuel, which is also beneficial to the optimization of environmental protection performance of the boiler. So, how to ensure that the oil and gas boiler can fully burn? Let Zhengzhou Fangkuai boiler manufacturer tell you the answer.

1. Ensure the right amount of air is supplied
       The ratio of the volume of carbon dioxide in the flue gas to the total volume of the flue gas is called the carbon dioxide content of the flue gas. Under normal combustion conditions, the volume of carbon dioxide in the flue gas is unchanged, but the total volume of the flue gas is affected by the excess air volume. When the amount of excess air increases, the total volume of flue gas will increase, and the carbon dioxide will decrease accordingly. On the contrary, when the amount of excess air is small, the carbon dioxide content will increase accordingly. The carbon dioxide content in the flue gas of the oil burner is about 12%.

2. The furnace maintains a certain high temperature and burning time
       The furnace temperature is an important condition for the complete combustion of fuel, and the combustion method of each boiler is suspension combustion. When burning in suspension, the temperature of the combustion center should be between 1300 and 1600, and the flame should be bright white. The fuel must have enough residence time in the furnace to completely release the heat. At present, all boilers are three-pass combustion, so it is very important to adjust the air distribution reasonably. When the flame is burning normally, the flame in the furnace is stable, white-orange, and there is generally a rumbling sound. If the flame jumps or makes an abnormal sound, the oil volume and air volume should be adjusted in time. If there is no improvement after adjustment, the flame should be turned off to find out the cause, and the ignition should be restarted after measures are taken.

3. Adjustment of fuel volume and air volume
       The adjustment range of a simple mechanical atomization nozzle is usually only 10%-20%. When the boiler load changes little, the method of changing the oil pressure in front of the furnace can be used to adjust, and the oil pressure can be increased to achieve the goal of fuel injection. When the load of the boiler changes greatly, atomizers with different apertures can be replaced to increase or decrease the fuel injection volume. Within a certain range, with the increase of air supply, the mixture of oil mist and air is improved, which is beneficial to combustion, but too much air volume will reduce the furnace temperature, increase the heat loss of incomplete combustion, and increase the heat loss of exhaust smoke. , Causing black smoke from the chimney, causing carbon deposits at the tail, and prone to secondary combustion accidents. In actual operation, employees can adjust the air supply volume according to the ignition of the fuel nozzle and the carbon dioxide content in the flue gas. It can be adjusted to normal by adjusting the frequency conversion of the fan or adjusting the opening of the fan baffle (strengthen the maintenance of the air regulator when the furnace is shut down for maintenance and make it flexible).

Zhengzhou Fangkuai Boiler Factory is a boiler equipment manufacturer specializing in energy saving, environmental protection, intelligence, and cost-effectiveness, such as oil-fired gas boilers and electric boilers. It has a comprehensive pre-sale, in-sale and after-sales service system, whether you want to consult Boiler knowledge or planning to purchase boiler equipment, we will arrange one-to-one technical engineers to provide you with free help and guidance.

Many users and friends are more interested in the oil and gas boilers launched by the Zhengzhou Fangkuai boiler manufacturer, and are very concerned about the quality of the equipment. Today, I will give you a detailed answer.

First of all, the oil and gas boilers of the Zhengzhou Fangkuai Boiler Factory can ensure complete combustion of fuel, which not only improves operating efficiency, but is also good for saving fuel and improving environmental protection coefficients.

During normal combustion, the temperature of the furnace is high enough to meet the requirements of combustion chemical reaction. Therefore, the burning speed of fuel oil is determined by the evaporation speed of oil droplets and the mixing speed of air and oil vapor. The higher the temperature, the smaller the particles, and the faster the oil will evaporate. For this reason, it is necessary to improve the atomization fineness of the oil, and strengthen the heating of the atomized oil flow by the high-temperature flue gas. At the same time, the mixing speed of the air is required to be compatible with the evaporation speed of the oil droplets, but the mixing speed of the oil vapor and air is increased. The key is to improve the air supply conditions.

Superheaters and reheaters are very important to the normal use of industrial boilers. Companies that use industrial boiler equipment must not neglect the overhaul and maintenance of these two auxiliary machines. Zhengzhou Fangkuai Boiler Factory has many years of working experience in the field of industrial boilers, and has a lot of hard work in auxiliary equipment such as superheaters and reheaters. Today I will briefly tell you about the use of superheaters and reheaters in industrial boilers. Issues that need attention.

Superheater (Superheater) is a component in the boiler that further heats steam from saturation temperature to superheat temperature, also known as steam superheater. According to different heat transfer methods, it can be divided into convection, radiant and semi-radiative; according to structural characteristics, it can be divided into serpentine tube, screen, wall and wall-wrapped. All of them are combined with parallel pipes and inlet and outlet headers.

The main function of the superheater is to heat saturated steam into superheated steam. When the boiler load changes, ensure that the boiler's superheated steam temperature fluctuates within the allowable range. At present, the temperature of superheated steam in power plant boilers is maintained at 540-555℃.

The reheater is essentially a steam superheater that reheats the low-pressure steam that has done work to reach a certain temperature. The function of the reheater further improves the thermal efficiency of the power plant cycle and controls the steam temperature of the last stage of the steam turbine. Within the allowed range. The superheater is a heater in the boiler that heats the steam from the steam turbine into superheated steam.

There are two main functions of the reheater. One is to reduce the humidity of water vapor, which is beneficial to protect the blades of the steam turbine; the other is to improve the relative introversion rate and absolute internal efficiency of the steam turbine. The exhaust steam from the high-pressure cylinder of the steam turbine is returned to the boiler to be heated again, and then sent to the low-pressure cylinder for expansion to perform work. The purpose is to control the steam humidity of the final stage blades of the steam turbine within the allowable range. The reheated steam pressure is 20% of the superheated steam pressure. All units above 125MW in our country use an intermediate reheating system.

Periodic blowdown of industrial boilers is to make the boiler water quality meet the required standards, reduce the adverse effects of scale on the boiler, and keep the impurities in the water within a certain concentration. It is necessary to continuously remove the salt and alkali content from the boiler. Larger boiler water and deposited residues, sludge and various sediments allow the safe operation of industrial boilers and prolong the service life of industrial boilers.

For industrial boilers, the blowdown is divided into two types: continuous blowdown and regular blowdown. Zhengzhou Fangkuai Boiler Factory will give you a brief introduction to these two blowdown methods.

1. Continuous blowdown
       Continuous blowdown can remove part of the salt dissolved in the boiler water to maintain a controllable amount of salt and alkalinity in the boiler water, and prevent excessive concentration from affecting the quality of boiler steam. Generally, the continuous blowdown outlet is installed at 200-300mm below the normal water level of the steam drum. The boiler water is continuously heated and concentrated, so that the salt is collected on the surface of the boiler water. The continuous outlet is installed at the place with the highest salt content in the boiler water. In order to discharge high-concentration salt water, a new water supply treatment is carried out.

2. Regular sewage discharge
       Regular sewage discharge is mainly to remove rust slag, calcium, magnesium and other flocculent sediments that have not been desalinated. Reduce its adhesion on the boiler wall and improve the thermal efficiency of the boiler. It is generally intermittent, also known as intermittent blowdown or bottom blowdown. The nozzle for regular blowdown is generally set at the lowest point of the boiler water cycle. The fixed discharge time is intermittent. Generally, the discharge is carried out when the boiler load is low. The fixed discharge discharge is large. Generally, only a short period of time can be used to achieve the purpose of sewage discharge, usually 0.5-1 minutes, depending on the boiler water quality. , But it should be avoided for a long time to schedule so as not to affect the normal circulation of boiler water. The regular work of chemical operation is selected in each post-night shift. The correct and reasonable blowdown device can discharge impurities, sludge, scale, etc. in the boiler water, control the alkalinity and salt content of the boiler water, ensure the cleanliness of the boiler heating surface, ensure that the boiler produces high-quality steam, and extend the boiler In the service life, the waste heat of the boiler is fully utilized, which can achieve the effect of energy saving.

Industrial boilers are one of the necessary equipment in many industrial industries. The high-temperature steam output by the boiler and the heat it brings can provide a source of power for the industrialized process. Zhengzhou Fangkuai Boiler Factory, as a company with many years of cooperation experience in the field of industrial boilers, has a lot of knowledge about boiler operation, maintenance, and maintenance. Today, I will tell you how much damage is caused by scaling to industrial boilers.

First of all, after the formation of scale inside the industrial boiler, the heat transfer performance of the heating surface becomes poor, and the heat released when the fuel is burned cannot be quickly transferred to the boiler water; therefore, a large amount of heat is taken away by the flue gas, causing the exhaust gas temperature to rise and increase The heat loss of exhaust gas reduces the thermal efficiency of the boiler.

Secondly, it may cause overheating and low strength of the metal, endangering safety. The steel used for the heating surface of industrial boilers is generally carbon steel. During use, the metal wall temperature is allowed to be below 450 ℃; when the boiler is in normal operation, the metal wall temperature is generally below 280 ℃. When there is no scale on the heating surface of the boiler, the metal can quickly transfer heat to the water after being heated. At this time, the temperature difference between the two is about 30 ℃. However, if scale accumulates on the heated surface, the temperature difference between the two will increase. For example: when the heating surface of a boiler with a working pressure of 1.25Mpa has 1 mm thick scale (mixed scale), the temperature difference between the metal wall and the boiler water will reach about 200 ℃; when the scale reaches 3 mm, the metal wall temperature will rise to 580 ℃, far exceeds the allowable temperature of steel. At this time, the tensile strength of the steel will be reduced, and the pressure components of the boiler will overheat, bulge, deform, leak, and even explode under the action of internal pressure. The measured data shows that the metal wall temperature increases as the scale thickness increases. The thicker the scale, the higher the metal wall temperature, and the greater the probability of accidents.

The water circulation of industrial boilers has two forms: natural water circulation and forced water circulation. The natural water cycle is a water cycle that relies on the pressure difference caused by the difference in the specific gravity of soda and water in the riser pipe and the down pipe. Forced water circulation depends on the mechanical power of the water pump to force the circulation. Regardless of which form of water circulation, it is designed and calculated, which means that there is enough circulation cross-sectional area. When scale builds up on the inner wall of the furnace tube, the circulation area in the tube is reduced, the flow resistance increases, the normal water circulation is destroyed, and the metal wall temperature toward the fire surface rises. When the pipeline is blocked by scale, the water circulation is completely stopped, and the metal wall temperature is higher, and pipe burst accidents will occur for a long time.

Once the industrial boiler scales, it must be removed quickly, so as to ensure the safe and economical operation of the boiler. The later the scale builds up, the more medicine is consumed, and the more money is invested. For example, if the average fouling of a 1t/h boiler is 3 mm, 0.5 tons of chemicals are required to remove the fouling once. After increasing according to the different boiler tonnage, the required reagent will increase by one-third, and the investment capital will increase accordingly.

The service life of general industrial boilers can run continuously for about 20 years under normal use conditions. However, most of the boilers of the current use units have not reached this life. There are many reasons for this, one of which is the influence of scale. The drum has a bulge, and after digging and repairing it, it should be properly reduced in pressure to ensure safety. In this way, for units that require high steam pressure, they have to replace a new boiler.

Vacuum hot water boiler is a kind of hot water boiler with stable operation and high safety factor. It is often used for heating and heating in office buildings, residential areas, shopping malls and other places with a large flow of people. Due to the superior performance of the vacuum hot water boiler, it has also been loved by many users, and the frequency of use is increasing year by year. What issues should be paid attention to when selecting the vacuum hot water boiler? Let Zhengzhou Fangkuai Boiler Factory provide you with guidance and help.

1. Fuel selection: The vacuum hot water boiler can use natural gas, liquefied petroleum gas, etc. as fuel. Zhengzhou Fangkuai Boiler Factory will advise users to give priority to the use of natural gas and recycled oil, which can be used for both oil and natural gas (special order).

2. Load selection: The heating load selection of any building cannot be budgeted. It has a great relationship with building insulation and indoor use, but it has a very small relationship with building area.

3. Pressure selection: warm water, sanitary hot water pressure specification, pressure 0.8 MPa. High pressure device is recommended for parts with pressure of 0.81 ~ 1.2 MPa. If the pressure is 1.21 ~ 1.6 MPa, fragmented and comprehensive elements should be based on economic and technical analysis. Use the ultra-high pressure unit type, or stop the secondary heat exchange. If the pressure is above 1.6MPa, it is recommended to design two heat exchangers.

4. Installation location: The vacuum hot water boiler unit runs smoothly, with almost no vibration, and low music. The location of the machine room is very convenient. The basement, air, floor, and roof can be used as a machine room. For high-rise buildings, to reduce unit pressure, the room should be in the middle or at the top.

5. Ventilation environment: Poor ventilation will cause humidity and corrosion in the machine room. The ventilation machine room should be more than twice an hour, and the air consumed per unit is based on the air budget of 15m3 of fuel consumption of 10,000 calories.

The inside of the vacuum hot water boiler is a vacuum negative pressure environment, and there is basically no risk of outward explosion. The safety factor is very high. It is mostly used in hotels, residential quarters, office buildings, shopping malls and other environments for heating and sanitary hot water. Heating and other fields. Since the pressure in the boiler body is required to always be in vacuum when working, the heat exchange rate and utilization rate are high, and the user frequency is also high.

However, Zhengzhou Fangkuai Boiler Factory still wants to remind you that in order to better protect the boiler body and ensure the safe use of the boiler, the following aspects should be paid attention to during the operation of the vacuum hot water boiler:

1. Before starting the operation of the vacuum hot water boiler, the gas pressure of the boiler must be checked to ensure that its pressure is normal. If the static pressure is only 6 kPa, it should be noted that only a small fire can be maintained, because under a pressure of 6 kPa, the large fire may be extinguished due to insufficient pressure.

2. When using a vacuum hot water boiler, pay attention to the pressure and temperature of the domestic hot water and heating medium water, and make sure that the pipeline valve is opened to prevent the inlet and outlet water valves of any heat transfer branch from closing, because during use, due to thermal expansion And the principle of cold shrinkage, the pressure will far exceed the rated working range. This caused major accidents such as pipeline explosions and boiler scrap.

3. Under various normal working conditions of the vacuum hot water boiler, pay attention to the operation of the water pump, carefully observe the outlet pressure of the water pump and its sound, and turn on the boiler control power supply when it works normally.

4. When the vacuum hot water boiler is running, pay attention to setting the relevant parameters on the display screen to ensure that the middle water temperature, the outlet water control temperature, the flame conversion temperature and the temperature difference can meet the operating requirements.

At present, there are many vacuum hot water boilers on the market that use gas oil as the main fuel. This is determined by combining my country's existing environmental protection standards and the national fuel distribution and utilization. Of course, the specific type of fuel to be used depends on the location of the company. To decide on the situation. Many users who need to purchase vacuum hot water boilers do not know much about the various boiler brands on the market, and do not know which boiler manufacturer has better product quality. Let Zhengzhou Fangkuai Boiler Factory guide you how to choose.

For companies that need to purchase vacuum hot water boilers, to judge a boiler plant and product quality, it is necessary to inspect the comprehensive strength of the manufacturer, product manufacturing technology, after-sales service system and other aspects in order to purchase high-quality boiler equipment.

Fuel gas vacuum hot water boilers are currently mainly used in domestic hot water and heating fields. They are more suitable for hotels, shopping malls, office buildings, bathing centers and other places, because for these places, large boiler equipment will be affected by the site Restricted and unable to enter the arena.

Recently, a chemical company consulted with the Zhengzhou Fangkuai boiler manufacturer to purchase a gas oil vacuum hot water boiler. However, the boiler model and price are not very clear, and the boiler manufacturer needs to calculate it. In this regard, the technicians of Zhengzhou Fangkuai Boiler Factory made a detailed understanding of the company’s situation and concluded that it is sufficient for the company to use a vacuum hot water boiler with an output of 2 tons. The current boiler market of this model The price ranges from 120,000 to 160,000 yuan.

There is no need to report for inspection when using vacuum hot water boilers, which can save a lot of time for enterprises and can improve production efficiency after quick commissioning. Therefore, there are still many enterprises using vacuum hot water boilers. The vacuum hot water boilers of Zhengzhou Fangkuai Boiler Factory are divided into ordinary vacuum and condensing vacuum models. The two types of boilers have certain differences in operating efficiency. The operating efficiency of condensing vacuum hot water boilers is higher than that of ordinary vacuum hot water boilers. Around 5-8%, more cost-effective.

Many users who need to use vacuum hot water boilers attach great importance to the selection of boilers. The solution given by Zhengzhou Fangkuai Boiler Factory is that if you want to calculate the suitable tonnage vacuum hot water boiler for your own plant, you need to have a detailed understanding of the amount of hot water required by your own plant. Recently, a company asked Fangkuai Boiler about the need to purchase a vacuum hot water boiler, but did not know the specific tonnage. After calculating the data of the manufacturer, Fangkuai Boiler concluded that the plant used A 1400KW (that is, 2 tons) vacuum hot water boiler is enough. The market price of this model of vacuum hot water boiler ranges from RMB 180,000 to RMB 250,000.

Some users who purchase boilers are not very good at boiler installation and commissioning, and often hope that the boiler manufacturer can directly be responsible for the transportation, installation and commissioning of the boiler. So, can the boiler manufacturer be responsible for installing the boiler? Let Zhengzhou Fangkuai Boiler Factory answer for you.

1. Boiler manufacturing enterprises can install boilers. Because according to the "Regulations for the Supervision and Management of Boiler Installation and Renovation Units" Boiler manufacturing enterprises that have obtained the boiler manufacturing license can transform the boilers manufactured by the enterprise and install the whole (assembled) factory-made boilers manufactured by the enterprise without obtaining a separate license.

2. The boiler is a kind of energy conversion equipment. The energy input to the boiler is chemical energy and electric energy in the fuel, and the boiler outputs steam, high temperature water or organic heat carrier with certain thermal energy. The original meaning of pot refers to a water container heated on a fire, and a furnace refers to a place where fuel is burned. A boiler includes two parts: a pot and a furnace. The hot water or steam produced in the boiler can directly provide the required heat energy for industrial production and people's lives, and can also be converted into mechanical energy by a steam power device, or converted into electrical energy by a generator. Boilers that provide hot water are called hot water boilers, which are mainly used in daily life, but there are also a few applications in industrial production. The boiler that produces steam is called a steam boiler, often abbreviated as a boiler, and is mostly used in thermal power stations, ships, locomotives, and industrial and mining enterprises.

3. The boiler is carried out in two parts of "boiler" and "furnace" at the same time. After the water enters the boiler, the heating surface of the boiler in the steam-water system transfers the absorbed heat to the water, so that the water is heated into hot water with a certain temperature and pressure or steam. Be led to the application. In the combustion equipment part, the combustion of fuel continuously releases heat, and the high-temperature flue gas generated by the combustion transfers the heat to the heating surface of the boiler through the heat transmission, and the temperature of itself is gradually reduced, and finally discharged by the chimney.

For users who need to use a vacuum hot water boiler, the selection of the boiler is a very critical step, which is related to the use and maintenance of the boiler in the later period. If you buy inappropriate boiler equipment, you will not only need to purchase a second time. This leads to increased input costs and delays the project construction period. So, what issues should be paid attention to when selecting a vacuum hot water boiler? Let Zhengzhou Fangkuai Boiler Factory tell you the answer.

1. Fuel selection for vacuum hot water boiler:
       Fuels such as natural gas and liquefied petroleum gas are common fuels used in vacuum hot water boilers. Zhengzhou Fangkuai Boiler Factory recommends that users give priority to natural gas and regenerated oil, which can be used for both petroleum and natural gas (special order).

2. Load selection for vacuum hot water boiler:
       This requires a certain understanding of the application field of vacuum hot water boilers, because the heating load selection of any building cannot be budgeted. This data has a great relationship with building insulation and indoor use, but it has a small relationship with the building area. relationship.

3. For the pressure selection of the vacuum hot water boiler:
       If you want the vacuum hot water boiler to output warm water and sanitary hot water, the pressure of the boiler is 0.8 MPa, and the pressure of the parts is 0.81~1.2 MPa, and the parts are recommended to use high-pressure devices. If the pressure is 1.21 ~ 1.6 MPa, the fragmented and comprehensive element should be based on economic and technical analysis to use the ultra-high pressure unit type, or stop the secondary heat exchange. If the pressure is above 1.6MPa, it is recommended to design two heat exchangers for the vacuum hot water boiler.

4. For the location selection of the vacuum hot water boiler:
       The unit of the vacuum hot water boiler runs smoothly, with almost no vibration and low music. The location of the machine room is very convenient. The basement, air, floor, and roof can be used as a machine room. If it is used in a high-rise building, in order to reduce the unit pressure, the boiler room should be set in the middle or the top of the floor.

Vacuum hot water boiler is a kind of boiler equipment that forms a negative pressure vacuum environment in a closed boiler body to quickly boil water and heat high temperature water for heating and heating. It is mostly used in hotels, residential quarters, office buildings, Shopping malls and other heating, sanitary hot water heating fields. The pressure in the boiler body is always under vacuum when working, so the heat exchange rate and utilization rate are high, and it has also been recognized and trusted by many users. However, Zhengzhou Fangkuai Boiler Factory suggests that in order to better protect the boiler body and ensure the safe use of the boiler, the following issues should be paid attention to during the operation of the vacuum hot water boiler:

1. Before each operation of the vacuum hot water boiler, the gas pressure of the boiler must be checked to ensure that its pressure is normal. If the static pressure is only 6 kPa, it should be noted that only a small fire can be maintained, because at a pressure of 6 kPa, the boiler running on a large fire may cause flameout due to insufficient pressure.

2. When using a vacuum hot water boiler, pay attention to the pressure and temperature of the domestic hot water and heating medium water, and make sure that the pipeline valve is opened to prevent the inlet and outlet water valves of any heat transfer branch from closing, because during use, due to thermal expansion And the principle of cold shrinkage, the pressure will far exceed the rated working range. This caused major accidents such as pipeline explosions and boiler scrap.

3. Under various normal working conditions of the vacuum hot water boiler, pay attention to the operation of the water pump, carefully observe the outlet pressure of the water pump and its sound, and turn on the boiler control power supply when it works normally.

4. When the vacuum hot water boiler is in operation, pay attention to setting the relevant parameters on the display screen to ensure that the middle water temperature, the outlet water control temperature, the flame conversion temperature and the temperature difference can meet the operating requirements.