Low-level deaerator system

Abstract

The invention discloses a low-level deaerator system and belongs to a deaerator system. The low-level deaerator system structurally comprises a deaerator, a boiler, a boiler water-feeding pump, a deoxygenating water pump and a water tank; a deaerator water inlet pipeline is arranged between the deoxygenating water pump and a water inlet of the deaerator; a deaerator water outlet pipeline is arranged between a water outlet of the deaerator and the boiler water-feeding pump; a plate heat exchanger is arranged between the deaerator water inlet pipeline and the deaerator water outlet pipeline; thedeaerator water inlet pipeline is divided into a first water inlet pipeline and a second water inlet pipeline; the second water inlet pipeline and the first water inlet pipeline are connected in parallel; the first water inlet pipeline is directly connected to the deaerator; and the plate heat exchanger is arranged on the second water inlet pipeline. The low-level deaerator system has the characteristics of reducing the temperature of deoxygenating outlet water, preventing the boiler water-feeding pump from generating cavitation erosion, increasing the water inlet temperature of the deaerator, reduces consumption of steam, avoiding consumption of power, greatly reduces operation cost and the like, thereby having good promotion and application value.

Description

technical field [0001] The invention relates to a deaerator system, especially a low-level deaerator system. Background technique [0002] Atmospheric deaerators are generally arranged at an elevation of about 7m. In front of the boiler feed water pump, a hydrostatic head sufficient to prevent water from vaporizing is generated to prevent deoxygenated water from entering the water pump to vaporize, and water shock is generated to flush the water pump so that the performance of the water pump is reduced or even cannot work normally. At present, due to the improvement of environmental protection awareness, the development of coal-fired boilers is limited, and oil-fired gas-fired boilers have become the mainstream. Boiler rooms with a capacity of 10t / h and below are basically arranged in a single layer. It is difficult to arrange the deaerator at a height of about 7m. The high-level arrangement of the oxygen generator will increase the civil construction investment, and will a...

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Problems solved by technology

The pressure and evaporation of the industrial boiler drum are stable, and the outlet pressure of the boiler feed pump can also be guaranteed. There is no problem in using jet water diversion, but the waste heat boiler is different. The waste heat boiler is limited by the conditions of the process furnace, and the pressure is extremely unstable. If there is none, the pressure of the fluid mixed by the jet pump cannot meet the design requirements, and the purpose of preventing pump cavitation cannot be achieved. 2) The flow rate of the boiler feed pump needs to be increased, and the high-pressure water volume of the jet pump needs to be taken into account. 10% to 15% must be added, which increases the cost of the pump

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