Flue gas recovery and condensation system

Abstract

The invention relates to the technical field of energy conservation, in particular to a flue gas recovery and condensation system. The flue gas recovery and condensation system comprises a flue gas heat exchange device, a high-temperature water tank, a boiler and a softened water tank; the flue gas heat exchange device comprises a smoke inlet pipe, a smoke outlet pipe and an energy conservator; the softened water tank is provided with a water supply pipe for supplying water to the boiler and a water inlet pipe for supplying normal-temperature water for the energy conservator; the energy conservator communicates with a water outlet pipe which further communicates with the high-temperature water tank; the high-temperature water tank is further provided with a water return pipe and a water drainage pipe; the water return pipe communicates with the water inlet pipe, and a three-way adjusting valve is arranged at the junction of the water return pipe and the water inlet pipe; the high-temperature water tank is provided with a liquid level sensor and a liquid level controller; and the water drainage pipe communicates with the water supply pipe, the water supply pipe is provided with a boiler water supplementing pump and a second valve, and the junction of the water drainage pipe and the water supply pipe is located between the boiler water supplementing pump and the second valve. Bymeans of the scheme, the problem that a boiler explodes during flue gas waste heat recovery in the prior art is solved.

Description

technical field [0001] The invention relates to the technical field of energy saving, in particular to a flue gas recovery and condensation system. Background technique [0002] In recent years, with the increasing development and progress of society, the country has gradually increased its requirements for resource conservation, environmental protection, and comprehensive utilization of energy. In the heating industry, gas-fired boilers have the advantages of less pollution and higher thermal efficiency than coal-fired boilers. [0003] 1m 3 Natural gas will release 9450kcal of heat after burning, of which sensible heat is 8500kcal, and the heat contained in water vapor (latent heat) is 950kcal. For traditional gas-fired boilers, the available thermal energy is 8500kcal sensible heat. In the heating industry, the calorific value of natural gas is generally calculated at 8500kcal / nm 3 base calculation. In this way, the ratio between the actual total calorific value of na...

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Problems solved by technology

[0005] The purpose of the present invention is to provide a flue gas recovery and condensation system to solve the problem of boiler explosion in the prior art when recovering waste heat from flue gas

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