Boiler Knowledge

Safety common sense when using gas hot water boiler for heating in winter

Winter is the peak season for using gas-fired hot water boilers for heating. Many users will purchase suitable boiler equipment in advance and carry out related debugging work before the heating season comes to prepare for normal use during the heating season. The technical engineers of Zhengzhou Fangkuai Boiler Plant summarized the following common sense about safety when using gas-fired hot water boilers for heating in winter, hoping to help everyone better operate the boiler equipment.

1. Strengthen the safety management of the boiler room, master the operation of the gas boiler, be familiar with the emergency handling methods of the boiler, and promptly rectify the self-inspection problems.

2. Boiler room management personnel, furnace managers, and water quality test personnel should hold certificates to work, implement various systems, and keep operational records.

3. It is strictly forbidden to put into use boilers without safety accessories such as safety valves and pressure gauges that have not obtained a certificate of use, have not been regularly inspected or have not passed the inspection. The illegal operation and operation of the boiler are strictly prohibited.

4. During the operation of the gas boiler, the steam pressure, water level and temperature should be ensured to be normal, and the automatic control device should be intact.

5. Do a good job in the patrol inspection of the boiler room, discover and properly handle potential safety hazards in a timely manner. Reasonable gas supply, save gas supply, prevent running, leaking, dripping and leakage, and prevent scalding.

6. It is necessary to ensure that the hot water boiler is not pressure-bearing, and the vent pipe is unblocked to prevent the vent pipe from being frozen.

2021-07-17 16:20:41

What are the advantages of Fangkuai Boiler's new gas boiler?

As a leader in the field of clean and environmentally friendly boiler equipment, Fangkuai Boiler has invested a lot of time and energy for many years to actively carry out research and development and testing, only to provide users and friends with better quality, higher operating efficiency and longer service life. Longer, more cost-effective boiler equipment. In 2021, what advantages does Fangkuai Boiler's new gas-fired steam boiler have that ordinary gas-fired boilers do not have?

1. Start-up operation of gas-fired steam boiler: minimalist operation, extremely fast startup
       The boiler adopts wing tube + threaded tube, the heat flow density on the flue gas side is increased; the heat exchange element is small and the heat absorption capacity is strong; the radiant heating element is connected with a linear expansion ring, and the elongation of the furnace bladder caused by heating is absorbed by the expansion ring. The additional stress on surrounding components is small; the eccentric arrangement is beneficial to the natural circulation of water in the boiler, the boiler water quickly reaches temperature balance, the boiler shell temperature is uniform, and the temperature difference stress is small. In the end, the boiler water volume is reduced to below 45% of conventional products to meet the industry demand for fast heat engines.

2. The operating state of gas-fired steam boiler is more balanced.
       The steam condensed return water produced by the boiler is consistent with the boiler water cycle to maintain the dynamic balance of the medium load; the boiler also has a larger steam space design to alleviate the risk of low water level caused by a large amount of backwater inrush instantaneously or a long time delay. The method of circulating the water tank and the air heater transfers energy to the combustion air. Make the water tank have heat capacity.

3. The utilization effect of gas-fired steam boiler is more full.
       Shutdown: After the furnace is shut down, the maximum capacity of the system to reflux condensate is saved for use in the next production cycle.

Steam condensate is slowly reduced in pressure and returned, adjusted by a pneumatic valve, so that the condensed return water is supplied to the appropriate height of the furnace body, ready for the next operating cycle; when it is running again, the furnace is started under heavy load, and the expansion of the boiler water just reaches the target water level Range, without manual intervention on the water level repeatedly.

2021-07-15 16:19:49

Ways to improve the energy-saving effect of gas boilers

In recent years, gas boilers have sprung up in the boiler market. Once they are introduced into the market, they have been widely loved and trusted by users and friends. Therefore, the frequency of use is also increasing year by year. Energy-saving is a problem that needs to be considered in industrial production, especially for industrial boilers that increase thermal power support for industrial production. Energy-saving reflects the technical level of the boiler industry. In addition to transforming traditional industrial coal-fired boilers into natural gas steam boilers, measures can also be taken to save energy during the operation of natural gas steam boilers. The technical engineers of Zhengzhou Fangkuai Boiler Factory compiled the following measures for energy-saving gas boilers:

1. Reasonably choose the rated power of the natural gas steam boiler and the number of boilers according to the amount of steam required for industrial production. The higher the matching degree between these two conditions and the actual use, the smaller the exhaust loss and the more obvious the energy saving. 

2. Full contact between fuel and air: Let the right amount of fuel and the right amount of air be combusted in the best ratio, which can not only improve the fuel combustion efficiency, but also reduce the emission of polluting gases, and achieve the goal of double energy saving.

3. Reduce the exhaust gas temperature of natural gas steam boilers: reduce the exhaust gas temperature of the boiler to effectively use the waste heat generated in the exhaust gas. The efficiency of the commonly used boiler is 85-88%, and the exhaust gas temperature is 220-230℃. If the energy saving device is installed and the exhaust heat is used, the exhaust gas temperature will drop to 140-150℃, and the boiler efficiency can be increased to 90-93%.

4. Recovery and utilization of the heat of boiler sewage: the heat in the continuous sewage is used through heat exchange to increase the temperature of the itching water to achieve the purpose of energy saving for natural gas steam boilers.

At the same time, the energy-saving measures of natural gas steam boilers can also reasonably recover the condensed water in the heating system and recover the heat of the condensed water.

2021-07-13 16:16:12

How to deal with water shortage in oil and gas boilers

When it is found that the oil and gas steam boiler is short of water, the water level gauge can be flushed to "call water" to determine whether it is a slight water shortage or a serious water shortage. The steps of the "call water" operation are as follows:
       1. Turn on the drain cock of the water level gauge;
       2. Close the steam cock of the water level gauge;
       3. Close the drain cock of the water level gauge.
       At this time, if there is a water level in the water level gauge, the boiler is slightly short of water, otherwise it is severely short of water.

1. When the boiler is slightly short of water, you can first turn on the steam cock of the water level gauge to restore the normal operation of the water level gauge, reduce fuel and air supply, weaken the combustion, slowly feed water to the boiler, and quickly find out the cause of the boiler water shortage. When the boiler water level gradually returns to above the lowest safe water level, increase fuel and air supply to resume normal combustion of the boiler.

2. When the boiler is seriously short of water, do not fill the boiler with water, because at this time the boiler may be dry, and the boiler metal may be in a state of overheating or burning red. Once water is added, serious danger will occur. When the boiler is seriously short of water, it should be shut down immediately according to the prescribed procedures.

2021-07-11 16:15:54

The boiler manufacturer tells you the reasons for the lack of water in oil and gas boilers

In the operation of oil and gas boilers, the drum (shell) contains and maintains a certain amount of water, which can make the steam pressure and boiler water level relatively stable, and is also conducive to the natural circulation of the boiler and the separation of steam and water, which is the basic condition to ensure the safe operation of the boiler .

If there is a serious water shortage in the oil and gas boiler, the tube on the heating surface of the boiler will be overheated and deformed or even burned; the tube bulge leaks and the expanded tube falls off; the steel on the heating surface is overheated or overburned, reducing or losing the bearing capacity Blasting; damage to the furnace wall, etc., if improperly handled, it will lead to more terrible consequences.

Zhengzhou Fangkuai Boiler Factory summarized the following more common causes of water shortage in oil-fired gas steam boilers for your reference:
       1. Operators are negligent and lax on water level monitoring;
       2. After the boiler is blown, the blowdown valve is not closed or closed, or the blowdown valve is leaking;
        3. The water supply equipment or water supply pipeline fails, which reduces or interrupts the water supply;
         4. The steam and water connecting pipes of the water level gauge are blocked, the cock leaks or other reasons form a false water level; 5. Blasting of boiler water walls, convection tube bundles, economizer tubes or smoke tubes to release water vapor.

2021-07-07 16:13:03

The "hard water" entering the boiler must be treated in advance

I believe that whether you are purchasing a hot water boiler or a steam boiler, the technicians will repeatedly emphasize that the water entering the boiler must be soft water after water treatment. Why do you say this? Let the technical engineers of Zhengzhou Fangkuai Boiler Factory answer for you.

If you put hard water, that is, ordinary water into the boiler, it is very easy to scale. Because the steam is constantly evaporating, it will cause the calcium, magnesium, and impurity concentration in the boiler water to be very high, which is 30-50 times that of natural water. The rate of scaling is very alarming. It may not take half a year to a year. There can be 1-2mm scaling. For boiler equipment, scale is extremely harmful, and in severe cases, it can also threaten the safe operation of the boiler.

After the appearance of scale, the thermal conductivity is only less than 0.5% of metal. After the appearance of boiler scaling, if the thermal efficiency is to be achieved without scale, the only way to increase the temperature of the heating surface inside the boiler, for example: when the furnace wall temperature is 250℃, When the scale is 1mm, if you want to achieve the same thermal efficiency, the wall temperature must be increased to 650°C. At this time, the heat absorption rate is extremely low, the energy consumption increases, and the fuel cost doubles.

It can be seen that, no matter from a safety or economic point of view, boiler water must be used in accordance with the use specifications and can only be used after water treatment.

2021-07-03 16:10:58

Importance of improving the quality of steam produced by steam boilers

For users and friends who need to use steam boilers, boiler thermal efficiency and steam quality directly affect production volume and production costs. Choosing a high-quality and efficient steam boiler can fundamentally reduce operating costs and improve benefits for enterprises. So how to effectively improve the quality of steam produced by the steam boiler? Let the technical engineers of Zhengzhou Fangkuai boiler manufacturer answer for you free of charge.

For steam boilers, steam quality refers to the degree of cleanliness of the steam, which is usually expressed by the total amount of impurities contained in the unit mass of steam; the steam contains various salts, alkalis and oxides and other impurities, and the main part is salt. In the same way, too much impurities in the steam will cause problems such as the surface of the superheater, the flow part of the steam turbine and the salt deposit in the steam pipe.

From the above analysis, we can see that in order to improve the steam quality, the salt content of the boiler water must be strictly controlled. At the same time, attention should be paid to the control of the dissolved salt in the steam and the saturated steam with water to obtain the clean steam required for the operation of the boiler. In order to reduce saturated steam with water, good steam-water separation conditions should be established and a perfect steam-water separation device should be adopted. In order to reduce the dissolved salt in the steam, the alkalinity of the boiler water can be appropriately controlled and a steam cleaning device can be used; in order to reduce the salt content of the boiler water, methods can be adopted to improve the quality of the feed water, perform boiler blowdown, and use segmented steam.

2021-07-01 16:09:57

What is the hourly cost of a 6-ton steam boiler?

The hourly cost of the 6-ton steam boiler includes fuel costs, water, electricity, etc. The consumption of water and electricity is relatively small, which can be ignored here, and the focus is on the level of fuel costs. The main factor that affects fuel costs is the operating cost of the boiler.

The 6-ton steam boiler launched by Zhengzhou Fangkuai Boiler Factory adopts wing energy-saving technology, and its operating efficiency per hour can reach more than 98%. It ranks in the forefront of the entire boiler market, so the cost per hour is also very low, which is very popular among users. . At present, the hourly cost of this type of boiler is around US$70.

Zhengzhou Fangkuai Boiler Factory is here to remind everyone that sometimes steam boilers will produce uneven heat during operation. The specific reasons may be as follows:

Thermal unevenness is the phenomenon of uneven thermal load in the same heating surface tube group. Thermal unevenness can be caused not only by structural characteristics, but also by boiler operating conditions. Such as the uneven distribution of smoke temperature and smoke velocity along the width of the flue; the uneven plane or uneven spacing of the serpentine tubes on the heating surface causes the flue gas corridor; the accumulation of ash, slagging on the heating surface, and the deflection of the furnace flame center; Poor adjustment of the running operation will cause the flame to deflect, move down, and raise, etc., which will cause uneven heat.
       (L) Ensure that the steam parameters reach the rated and stable operation.
       (2) Ensure that the fire is stable, the combustion center is appropriate, the flame is evenly distributed, and the equipment is not burned out, so as to avoid ash accumulation and coking.
       (3) Make the boiler and unit operate safely under the most economical conditions.

2021-06-29 17:21:47

What is the hourly operating cost of a 12-ton steam boiler?

Steam boilers are often used as power equipment, or output high-temperature steam directly involved in manufacturing, especially in industrial industries with a very high frequency of use. The 12-ton steam boiler is a medium-sized boiler. Before using this type of boiler, many users are very interested in the hourly operating cost of the boiler. Let the technical engineer of Zhengzhou Fangkuai Boiler Factory calculate it for you.

As the name suggests, the 12-ton steam boiler can output 12 tons of high-temperature steam per hour. At present, the hourly operating cost of this type of steam boiler on the market is around 3000-4000 yuan, while the operating efficiency of the steam boiler launched by Zhengzhou Fangkuai Boiler Factory can reach more than 98%, and the hourly operating cost can be controlled at 2600 yuan, which is very energy-efficient. save money.

In addition, when purchasing a steam boiler, everyone should pay attention to the heat storage capacity, because this data will have a significant impact on the operation and regulation of the boiler.

When the external load changes, the temperature and heat of the working fluid and metal in the boiler will change. If the load increases and the vapor pressure drops when the combustion ends in a timely manner, the corresponding saturation temperature will decrease, and the liquid heat of the pot water will decrease accordingly. At this time, the pot water and the heat storage in the metal will cause part of the pot water to vaporize and become steam. The production of these additional evaporation can play a role in slowing down the vapor pressure drop. Therefore, the greater the heat storage capacity, the slower the vapor pressure drops. On the contrary, when the combustion conditions remain unchanged and the load decreases and the vapor pressure rises, due to the increase in the saturation temperature, the working fluid and the metal will store part of the heat, which slows down the rise in the vapor pressure. Therefore, the heat storage capacity of the boiler is beneficial to the stability of operating parameters. However, when the boiler adjustment needs to actively change the working conditions to change the combustion rate, the load, pressure, and temperature of the boiler are slow to change due to the heat storage capacity, and cannot quickly adapt to the requirements of the changing working conditions.

2021-06-27 17:20:53

What is the cost of consumption of a 20-ton gas-fired steam boiler?

The 20-ton gas-fired steam boiler is a medium-sized boiler equipment, commonly found in industrial industries, such as building materials factories, fertilizer factories, glass factories, etc. Considering that this type of boiler is not a small equipment, and the cost of consumption is relatively high, users and friends are more concerned about it. The technical engineers of Zhengzhou Fangkuai Boiler Factory will come to calculate for everyone.

The main factors that affect the cost of the 20-ton gas-fired steam boiler are water and electricity, sewage, and fuel costs. Fuel costs are the key expenditure and affect the consumption cost of the entire boiler. The hourly operating cost of the 20-ton gas-fired steam boiler launched by Zhengzhou Fangkuai Boiler Factory is around US$700. If everyone maintains the boiler properly, the operating cost will be reduced.

At the same time, everyone should also pay attention to prevent uneven heating of steam boilers.

The uneven thermal power of the boiler is the phenomenon of uneven thermal load in the same heating surface tube group. Thermal unevenness can be caused by structural characteristics as well as operating conditions. Such as the uneven distribution of smoke temperature and smoke velocity along the width of the flue; the uneven plane or uneven spacing of the serpentine tubes on the heating surface causes the flue gas corridor; the accumulation of ash, slagging on the heating surface, and the deflection of the furnace flame center; Poor adjustment of the running operation will cause the flame to deflect, move down, and raise, etc., which will cause uneven heat.
       (1) Ensure that the steam parameters reach the rated and stable operation.
       (2) Ensure that the fire is stable, the combustion center is appropriate, the flame is evenly distributed, and the equipment is not burned out, so as to avoid ash accumulation and coking.
       (3) Make the boiler and unit operate safely under the most economical conditions.

2021-06-25 17:19:48

 8/38
 
 8/38