Hot water boilers and steam boilers are relatively common boiler equipment in the market, and they have room for development in all walks of life. So, what is the difference between a hot water boiler and a steam boiler, and where are they applicable? Let Zhengzhou Fangkuai Boiler Factory answer for you.
Simply put, hot water boilers are used for heating and hot water supply, such as bathing centers, swimming pools, residential areas, etc. are all needed, and it can even be said that as long as it is a place that needs heating, hot water boilers are needed. The largest tonnage hot water boiler launched by the Zhengzhou Fangkuai boiler manufacturer is a 130-ton fuel-fired gas hot water boiler; while the steam boiler is mainly used in the chemical, building materials, textile and other industrial industries for the production of steam. Of course, it can also Heating is generally provided by the way in production workshops and industrial parks, which is the case of combined heat and power.
Hot water as a heat source is suitable for air conditioners, heaters, low-temperature ovens, drying equipment, hot water tanks for textile printing and dyeing, and various low-temperature heating, air-conditioning coils and heat exchange equipment. Hot water as a heat medium has the following advantages:
1. Hot water boilers generally have a low heat medium temperature and a large temperature difference with the flue gas. The boiler exhaust gas temperature is relatively low, so the boiler efficiency is high;
2. The closed hot water system has a small amount of make-up water, a much smaller blowdown rate than a steam boiler, and less water waste. In addition, the boiler water quality requirements are low, and the water treatment cost is low; 3. The specific heat capacity of water is large, the hot water capacity in the system is large, and the heat storage capacity is strong. When there is a short-term failure in thermal or hydraulic operating conditions, it will not cause significant fluctuations in heating conditions;
4. The hot water heating system can be pumped for long-distance transportation, with small heat loss and large heating radius, which can meet the requirements of urban central heating planning. The main disadvantages of using hot water as a heating medium for heating are lower temperature, lower heat transfer coefficient, and lower heat utilization rate.
Relatively speaking, steam boilers are the most widely used in my country, because the industrial coverage is too wide. The main advantages of steam boilers are:
1. Low cost and wide adaptability, which can simultaneously meet the heat requirements of a variety of users who have different requirements for pressure and temperature;
2. Non-toxic, can directly heat food, etc., even if there is leakage, it will not cause harm to the environment;
3. The steam temperature is relatively high, and the latent heat of vaporization is large. Compared with hot water, it can reduce the heat exchange area of the equipment and reduce the cost;
4. Low thermal inertia, heat up quickly when steam is supplied, and cool down quickly when steam is stopped. The steam heat medium is difficult to recover due to the condensed water, which causes a waste of latent heat and water resources. Even if there is a condensate recovery device, in the process of condensate recovery, the water easily dissolves impurities such as oxygen, which can easily cause harm to the boiler. Impurities such as oxygen and salt in the feed water will cause boiler fouling, corrosion and other problems, affecting the safety and energy saving of the boiler.
