Flue gas waste heat and moisture recycling system

A flue gas waste heat and moisture technology, applied in the field of water saving and energy saving, can solve the problems of inability to utilize waste heat, high equipment operation costs, high consumption of high-quality heat sources, etc., and achieve the effect of reducing heating heat and reducing boiler energy consumption

Pending Publication Date: 2021-07-09
DATANG ENVIRONMENT IND GRP
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  • Summary
  • Abstract
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  • Claims
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AI Technical Summary

Problems solved by technology

[0002] The temperature of the flue gas after passing through the desulfurization tower in thermal power plants is relatively low. When the method of condensation first and then heating is used to realize the recovery and utilization of flue gas water vapor, the quality of the waste heat energy of the flue gas is relatively low, so there is little room for deep utilization of the recovered energy. , when the flue gas heats up, it needs to consume a lot of high-quality heat sources. The condensed water produced in the recovery process contacts with the flue gas to make its quality poor. If this part of water resources is to be fully utilized, further processing is required.
When the membrane condensation technology is used alone to recover flue gas moisture and waste heat, the temperature of the recovered water is limited, and the waste heat cannot be effectively utilized, and the amount of recovered water fluctuates greatly according to the change of the flue gas volume, which cannot be effectively controlled independently
When the heat pump method is used to recover the moisture and waste heat of the flue gas, it is often used to heat the flue gas or absorb heat from the flue gas, but the temperature difference of the flue gas at different positions cannot be effectively and fully utilized, resulting in a was

Method used

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Example Embodiment

[0023] In the following, only some exemplary embodiments are briefly described. As those skilled in the art would realize, the described embodiments may be modified in various different ways, all without departing from the spirit or scope of the present invention. Accordingly, the drawings and descriptions are to be regarded as illustrative in nature and not restrictive.

[0024] In describing the present invention, it is to be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", " Back", "Left", "Right", "Straight", "Horizontal", "Top", "Bottom", "Inner", "Outer", "Clockwise", "Counterclockwise", etc. or The positional relationship is based on the orientation or positional relationship shown in the drawings, which is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the referred device or element must have a specific orienta

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Abstract

The invention provides a flue gas waste heat and moisture recycling system. The system comprises a membrane condenser and an absorption heat pump circulation system connected with the membrane condenser, and flue gas passing through the membrane condenser is used as a heat source. According to the implementation manner of the flue gas waste heat and moisture recycling system, the absorption heat pump circulation system forms circulation by utilizing the waste heat of flue gas, and low-temperature flue gas does not need to be heated by additional heat, so that the self-circulation purpose of absorbing heat from the high-temperature flue gas and releasing heat to the low-temperature flue gas is realized; and the membrane condenser is used for recovering moisture in the flue gas, recovered water is clean and can supplement water for a boiler, recycling of water resources is achieved, the recovered water can be heated at the position of a condenser, heating heat needed by temperature rise of the recovered water is reduced, and energy consumption of the boiler is reduced. The absorption heat pump circulation system and the membrane condenser are organically combined, the advantages of the absorption heat pump circulation system and the membrane condenser are fully utilized for complementation, and gradient utilization of energy and water heat recovery of wet flue gas are achieved.

Description

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Claims

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Application Information

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Owner DATANG ENVIRONMENT IND GRP
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