Drying dehydration steam-recycle process and device for solid containing water

A technology for dehydrating steam and solids, which is used in drying solid materials, lighting and heating equipment, heating to dry solid materials, etc. The effect of strong adaptability of raw materials and low energy consumption

Inactive Publication Date: 2011-09-14
CHINA LIGHT IND INT ENG CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the above-mentioned drying and dehydrating equipment all have problems such as the need to use air as the heat carrier, the large consumption of electric energy and heat energy, and the inability to use the heat energy of water vapor in the drying tail gas.

Method used

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  • Drying dehydration steam-recycle process and device for solid containing water
  • Drying dehydration steam-recycle process and device for solid containing water

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0012] Embodiment 1: Get 100 tons of papermaking white mud (white mud 30%, water 70%) material and carry out heat transfer evaporative drying dehydration, evaporative drying temperature 110-170 ℃, heating steam (mixed steam) temperature 120-200 ℃, by changing The heater indirectly conducts heat transfer and evaporation with the water-containing solids, and the generated secondary steam and solids are separated from the steam and solids by the body dry dust collector. After dehydration, the solids are used as white mud comprehensive utilization products, and the secondary steam (70 tons / hour) The steam injection pump uses high-pressure working steam (81.67 tons / hour) to inject mixed steam as the heat source for the next cycle heat exchanger to indirect heat transfer and evaporation with water-containing solids, and the other part (46.67 tons / hour) is used as a heat source. .

Embodiment 2

[0013] Embodiment 2: Take 100 tons of inorganic salt (97% of inorganic salt, 3% of water) material and carry out heat transfer evaporation drying dehydration, evaporation drying temperature 110-170 ℃, heating steam (mixed steam) temperature 120-200 ℃, through heat exchange The device indirectly conducts heat transfer and evaporation with the water-containing solid, and the generated secondary steam and solid mixture are separated by steam-solid separation through the body dry dust collector. After dehydration, the solid is used as an inorganic salt product, and the secondary steam (3 tons / hour) is steam injected. The pump uses high-pressure working steam (3.5 tons / hour) to eject the mixed steam as the heat source for the next cycle heat exchanger to transfer heat and evaporate the water-containing solids indirectly, and the other part (2 tons / hour) is used as a heat source.

Embodiment 3

[0014] Example 3: Take 100 tons of washing powder (washing powder 70%, water 30%) for heat transfer, evaporation, drying and dehydration. The device indirectly conducts heat transfer and evaporation with the water-containing solids, and the generated secondary steam and solids are separated by steam-solid separation through the body dry dust collector. After dehydration, the solids are used as washing powder products, and the secondary steam (30 tons / hour) is steam injected. The pump uses high-pressure working steam (35 tons / hour) to extract the mixed steam as the heat source for the next cycle heat exchanger to transfer heat and evaporate the water-containing solids indirectly, and the other part (20 tons / hour) is used as a heat source.

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PUM

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Abstract

The invention provides a drying dehydration steam-recycle process and device for solid containing water, belonging to the fields of a chemical industry technology and a heat exchanging device. Mixing steam is taken as a heat source, heat is indirectly transferred between the mixing steam and the solid containing water through a heat exchanger to evaporate the mixing steam, the mixture of the generated secondary steam and the solid is subjected to gas-solid separation by a body dry dust collector; the solid after dehydration is a dry finished product; a part of the secondary steam is injected into mixing steam by high-pressure working steam for a steam injection pump to serve as a heat source of indirect heat transfer and evaporation of the next circulation heat exchanger and the solid containing water, a part of the secondary steam is injected out to serve as a heat source to be utilized, and the other part of the secondary steam is circulated, is mixed with the solid containing water and exchanges heat with the heat exchanger. The adaptability raw materials used by the device has strong adaptability and low cost, the device has the characteristics of low energy consumption, no pollution and the like, and heat energy can be recycled.

Description

technical field [0001] The invention relates to a drying and dehydration steam reuse process and equipment for water-containing solids. Background technique [0002] Dehydration equipment for water-containing solids includes airflow drying tube dehydration equipment; vibrating fluidized bed drying and dehydrating equipment; internal heating fluidized bed drying and dehydrating equipment. However, the above-mentioned drying and dehydrating equipment all have problems such as the need to use air as a heat carrier, the consumption of electric energy and heat energy, and the inability to utilize the heat energy of water vapor in the drying tail gas. Contents of the invention [0003] The purpose of the present invention is to provide a drying and dehydration steam reuse process and equipment for water-containing solids. This process enables the drying and dehydration steam of water-containing solids to be used for recycling in this process, and the equipment provided has stron...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F26B3/00
Inventor 林月清彭赛军
Owner CHINA LIGHT IND INT ENG CO LTD
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