Waste heat recovery system for table salt drying tail gas

A waste heat recovery system and exhaust gas drying technology are applied in the directions of drying solid materials, heating to dry solid materials, drying, etc., which can solve the problems of corroded heat exchange tubes, no published patent documents, and hindered heat exchange, etc., to improve utilization High efficiency, ensuring work continuity, and preventing pipe wall fouling

Pending Publication Date: 2020-01-17
TIANJIN UNIVERSITY OF SCIENCE AND TECHNOLOGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, in the above-mentioned process, the exhaust gas after convection drying of hot air has relatively high humidity, contains more water vapor, and is mixed with a large amount of sodium chloride and sodium sulfate. It is cooled by heat exchange with normal temperature air in the air preheater to reach its dew point. Finally, water droplets condense out to form a layer of liquid layer containing sodium chloride and sodium sul

Method used

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Examples

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Example Embodiment

[0019] The present invention will be described in further detail below through specific examples. The following examples are only descriptive and not restrictive, and the protection scope of the present invention cannot be limited by this.

[0020] A waste heat recovery system for drying tail gas of table salt, which is innovative in that it includes a fluidized gas preheating unit, a fluidized bed dryer 4, a tail gas processing unit and a material preheating unit.

[0021] The fluidized gas preheating unit includes a high-pressure blower 1, an air preheater 2, and a hot blast stove 3 connected in sequence. The hot blast stove is connected to the fluidizing gas inlet of the fluidized bed dryer, and the preheated and heated air is used as fluidization The fluidized drying gas of the bed dryer.

[0022] The material preheating unit includes a slurry delivery pipe 12, a slurry pump 11 and a heat exchange spray tower 9. The slurry delivery pipe is equipped with a slurry pump, and the slurry

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PUM

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Abstract

The invention relates to a waste heat recovery system for table salt drying tail gas. A hot blast heater is connected to a fluidized gas inlet of a fluidized bed dryer, a gas outlet of a cyclone separator is connected to a first water absorption tower through a first gas inlet pipe, a gas outlet of the fluidized bed dryer is connected to an induced draft fan, and a gas outlet in the top end of thefirst water adsorption tower is connected to an air preheater. A material preheating unit comprises a slurry conveying pipe, a slurry pump and a heat exchange spray tower, the slurry pump is arrangedon the slurry conveying pipe, and the slurry conveying pipe passing the heat exchange spray tower is connected to a material inlet of the fluidized bed dryer. The waste heat recovery system is scientific and reasonable in design, can remove corrosion of table salt drying tail gas to the wall of a heat exchange tube, reduce humidity and dust of tail gas, prevent scaling of the heat exchange tube,and improve the heat transfer efficiency. Meanwhile, the waste heat recovery system can recycle heat of the tail gas, so that the utilization ratio of energy source is improved.

Description

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Claims

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Application Information

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Owner TIANJIN UNIVERSITY OF SCIENCE AND TECHNOLOGY
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