| 摘要 |
<p>Provided is a natural circulation indirect type flue gas reheater, which comprises a heat absorption section and a first heat releasing section arranged in a flue, a second heat releasing section arranged out of the flue for heating condensed water, and a control system, wherein the heat absorption section is arranged in a high-temperature flue in front of a desulfurizer; the first heat releasing section is arranged in a low-temperature flue behind the desulfurizer; the first heat releasing section and the second heat releasing section are respectively connected to the heat absorption section through a circulating pipe in which a heat transfer medium is arranged. A flow regulating valve is arranged on a condensed water pipeline that enters the second heat releasing section. Temperature sensors are arranged on both the first heat releasing section and the heat absorption section. The flow regulating valve and the temperature sensors are all connected to the control system. Heat of flue gas before desulfurization is recycled to indirectly heat clean flue gas after the desulfurization. The problems of corrosion, leakage and the like occurring in a traditional GGH system are solved. Instability of the traditional GGH system is changed.</p> |
