A water tube high temperature hot water boiler

Abstract

The invention relates to a water-tube type high-temperature hot water boiler, comprising a burner (1), a furnace chamber (2) and a tube bundle component area (3). The burner (1) is arranged at the left end of the furnace chamber (2), and the tube bundle component area (3) ) is arranged in front of the furnace chamber (2), the furnace chamber (2) and the tube bundle component area (3) are communicated through a flue gas outlet window, and the tube bundle component area (3) includes a high temperature tube bundle area (301) and a low temperature tube bundle area (302), which are It is characterized in that: each tube bundle area includes multiple rows of serpentine tubes, and both ends of the serpentine tubes are respectively fixedly connected to the corresponding tube bundle area inlet header and tube bundle area outlet header; The end is connected to the return water, the outer end of the low temperature tube bundle area outlet header (304) is connected to the left end of the furnace (2), the outer end of the high temperature tube bundle area inlet header (305) is connected to the left section of the furnace (2), and the high temperature tube bundle area outlet header (306) The outer end is connected to the right end of the furnace (2), and the right section of the furnace (2) is also provided with a water outlet (14).

Description

technical field [0001] The invention belongs to the technical field of high-temperature hot water boilers, in particular to the technical field of hot water boilers in which the temperature difference between inlet and outlet water is greater than 30° C., and specifically relates to a water tube type high-temperature hot water boiler. Background technique [0002] With the continuous rapid development of my country's economy and the improvement of national environmental protection awareness, the demand for large-scale fuel-fired gas-fired hot water boilers is also increasing, and the outlet water temperature is also getting higher and higher. The main applications of this type of boiler are listed below: [0003] 1. For heating in cold northern regions, the thermal power of a single boiler is generally above 20MW, the boiler inlet water temperature is 70°C, and the outlet water temperature is generally required to be not lower than 130°C. [0004] 2. In order to ensure the ...

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Problems solved by technology

[0006] 1. Due to the small difference in the density of hot water at various temperatures, the flow rate of natural water circulation is low, and the heating surface in the area with a large heat load is prone to supercooled boiling, resulting in overheating damage to the heating surface

[0007] 2. The heat absorption in the convection tube bundle area is mainly for the evaporation heat absorption of steam, but for the hot water boiler, the heat absorption effect is not obvious, so the exhaust gas temperature of the boiler is relatively high, generally around 180°C, and the heat loss is large

[0008] 3. In order to improve the thermal efficiency of the boiler, an economizer must be added at the tail of the boiler, which occupies a large area and increases the investment

[0009] 4. The boiler has a large volume of water and a slow heating rate

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