High-efficiency large-scale boiler replaces low-efficiency heat-supply boiler

After lowering the vacuum operation, the circulating water temperature is appropriately increased so that it can be utilized to the extent that heat is supplied to the user via the heat network, thereby recovering the exhaust condensation heat. Although due to the increase in vacuum, at the same inlet steam flow rate, compared with the pure coagulation conditions, the power generation is less, and the relative internal efficiency of the steam turbine is also somewhat reduced, but due to the reduction of the loss of the cold source in the thermal cycle of the device, the device The thermal efficiency will still be greatly improved.

The combined heat and power generation not only reduces the loss of cold source, but also organically combines heat and electricity production. According to the energy quality required by users, it can be reasonably used in the heat supply, and it can also be replaced by a large boiler with high efficiency. Inefficient heating boilers and improved energy efficiency have become one of the effective energy-saving methods.

The relationship between power generation, exhaust heat supply, extraction heat supply and main steam flow is the relation curve between power generation and main steam flow. It shows that the exhaust pressure increases (ie, the lower the operating vacuum), the same main steam flow situation Lower power generation. The relationship between exhaust steam supply and main steam flow. The greater the main steam flow, the less exhaust heat, because the main steam flow is calculated with the increase of the extraction of steam, but the exhaust steam influencing the exhaust steam heating is the opposite, with the extraction of steam, The amount of replenishing water is reduced, and the amount of steam extraction in the front stage is reduced. Therefore, the exhaust steam volume is increased at the same main steam flow rate. To increase the exhaust heat supply should reduce the extraction steam flow, increase the main steam flow.