Smoke water condensing and waste heat recovering device

A waste heat recovery device and flue gas condensate technology, applied in the fields of anti-corrosion, energy saving and emission reduction, can solve the problems of low-temperature corrosion, difficult long-term use of heat exchangers, etc., and achieve the effects of not easy to scale, compact structure, and low cost

Active Publication Date: 2012-06-27
XI AN JIAOTONG UNIV
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Problems solved by technology

[0003] However, because the flue gas temperature at the outlet of the desulfurization tower is generally about 50°C, a

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  • Smoke water condensing and waste heat recovering device
  • Smoke water condensing and waste heat recovering device
  • Smoke water condensing and waste heat recovering device

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Embodiment Construction

[0015] The present invention will be described in further detail below in conjunction with the accompanying drawings.

[0016] see Figures 1 to 3 , the present invention includes a shell-and-tube heat exchanger 1 installed at the tail of the desulfurization tower 4 at the rear end of the boiler and connected to the heat pump. The water collection device 2 of the heat exchanger is also provided with an overflow tank connected to the water collection device 2 of the heat exchanger. The cooling water inlet header 3 is connected with the desulfurization tower 4 through a pipeline, wherein the cooling water enters The water header 3 is divided into two levels, and the cooling water inlet headers of each level are divided into group headers that can be closed separately. The temperature of the cooling water inlet is 5-50°C lower than the flue gas temperature. The heat exchanger 1 The capillary tubes are made of anti-corrosion material PP or PTFE to solve the problem of low-tempera...

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Abstract

A smoke water condensing and waste heat recovering device is provided. A propene polymer (PP) (or polytetrafluoroethylene (PTFE)) heat exchanger is arranged at the top of a desulfurizer or in a smoke duct of the desulfurizer to aim at solving the problems that smoke temperature at a desulfuration outlet is generally from 50 DEG C to 60 DEG C, and low temperature corrosion exists. After smoke flows by the heat exchanger to be cooled, water steam in the smoke condenses, and is recovered and sent back to a desulfuration system; heat released by the smoke and vaporized latent heat released by the steam are used by a heat pump to continuously increase temperature and supply heating. The smoke water condensing and waste heat recovering device aims at solving the problem of low temperature corrosion of the tail smoke of desulfuration, adopts the heat exchanger made of corrosion-resistant materials, recovers waste heat and smoke condensate water, and has a positive effect for energy saving and consumption reduction of a power plant.

Description

technical field [0001] The invention belongs to the fields of anticorrosion, energy saving and emission reduction, and relates to a flue gas condensation water and waste heat recovery device. Background technique [0002] The flue gas after wet desulfurization contains a large amount of water vapor and is in a saturated state. A 600MW unit emits about 200 tons of water vapor from the chimney to the atmosphere per hour. In the water-scarce northern regions, most of this water comes from underground pumping. Such pumping is enormously detrimental to groundwater resources. Therefore, more and more people pay attention to the recovery of water vapor. [0003] However, because the flue gas temperature at the outlet of the desulfurization tower is generally about 50°C, and there are low-temperature corrosion problems, it is difficult for general heat exchangers to be used for a long time. If the corrosion problem of the flue gas can be solved, the temperature of the flue gas ca...

Claims

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Application Information

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IPC IPC(8): F24D3/18F28F21/06
Inventor 谭厚章熊英莹许超司纪朋
Owner XI AN JIAOTONG UNIV
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