Flue gas condenser

Abstract

The invention discloses a flue gas condenser, comprising an outer casing, a heat exchanging component, a flue gas inlet, a flue gas outlet, a cooling water inlet and a cooling water outlet. The heat exchanging component is a capillary, two ends of which are respectively connected with the cooling water inlet and outlet. Compared with the prior art, the invention enlarges a heated area of the heat exchanging component so as to further recycle heat and to more effectively enhance the heating efficiency of the equipment. Simultaneously, the PTFE and anti-corrosion materials are adopted to effectively prevent the corrosion of acid condensed water so as to avoid early damage due to corrosion to the condenser and to prolong the service life of the equipment.

Description

technical field [0001] The invention relates to thermal equipment, which belongs to the energy-saving technical field of fuel oil (gas) and hydrogen-containing fuel equipment, in particular to a novel flue gas condenser. Background technique [0002] The exhaust gas temperature of oil-fired and gas-fired boilers is relatively high, generally above 150°C, especially for steam boilers, many of which exceed 200°C; the exhaust gas temperature of gas water heaters is 160-180°C; the exhaust gas temperature of wall-hung boilers is 120°C about. At the same time, oil and gas contain a large amount of hydrogen, among which the hydrogen content in fuel oil accounts for about 11-14% of the fuel components, the hydrogen content in gas accounts for about 20% of the fuel components, and the natural gas is as high as 25%. The combustion of fuels with more hydrogen elements produces a large amount of water vapor, which makes the flue gas carry a large amount of latent heat of vaporization. ...

AI Technical Summary

Problems solved by technology

However, the dew point of water vapor in flue gas is low, generally below 60°C. To recover this part of heat, it is necessary to overcome the limitation of small heat transfer temperature difference. However, due to the limited heating area and heat transfer efficiency of finned tubes and heat pipes, only When the temperature of the flue gas drops to about 80°C, the effect of condensing the water vapor of the flue gas cannot be achieved; at the same time, when the water temperature in the heat exchanger is lower than the dew point temperature of the flue gas, there will be condensation, and the condensed water is acidic (PH=4~5 ) and dissolve more oxygen and carbon dioxide, and the heat exchanger is generally a metal product, so the condensed water has a significant corrosion effect on the equipment. If the flue gas contains sulfur, the corrosion will be more serious

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