Use method of absorbed recycle acid waste heat in sulfuric acid process

A technology of absorption cycle and process, applied in heating methods, cooling fluid circulation devices, applications, etc., can solve problems such as waste of water resources and insufficient utilization of waste heat, and achieve the effect of widespread application value, significant direct benefits and ecological benefits.

Inactive Publication Date: 2020-08-11
CHIFENG YUNTONG NONFERROUS METALS
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  • Abstract
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  • Application Information

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Problems solved by technology

Absorbing acid cycle acid heat removal, adopting traditional open circulating cooling water system to absorb cycle acid heat removal, there are common problems of waste of water resources and waste heat can not be fully utilized, sulfuric acid production of low-grade heat utilization has been included in the national energy saving and emission reduction Therefore, it is of great significance to improve the utilization level of waste heat in the sulfuric acid industry

Method used

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  • Use method of absorbed recycle acid waste heat in sulfuric acid process

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Embodiment

[0014] The acid inlet temperature of the first cooler 1# is 100°C, the acid outlet temperature is 78°C, the acid inlet temperature of the first cooler 2# is 87°C, the acid outlet temperature is 75°C, the inlet water temperature of the cold side is 28°C, and the outlet water temperature is 35°C, open The inlet water temperature of the cooling water tower of the type circulating cooling water unit is 35°C, and the outlet water temperature after cooling is 28°C. The cold side inlet water (heating water) Return water) temperature is 45°C, cold side outlet water (heating water supply) temperature is 60°C. The heat removal task of the absorption cycle acid is completed by the first cooler and the open circulation cooling water unit in the non-heating period, and is completed by the second cooler, heating circulation pump and town / factory heating system in the heating period, and the absorption acid is realized synchronously use of excess heat.

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Abstract

The invention discloses a use method of absorbed recycle acid waste heat in a sulfuric acid process. At the non heating period, the absorbed recycle acid is subjected to heat exchange through a firstcooler, cooling water in the first cooler carries out heat exchange with the absorbed recycle acid and is input into an open type circular cooling water unit, at the heating period, the absorbed recycle acid is subjected to heat exchange through a second cooler, the cooling water in the second cooler carries out heat exchange with the absorbed recycle acid and is conveyed to a heating system through heating circular pump, heat of the absorbed recycle acid in the acid making process can be removed, at the heating period, the efficient recycling of the absorbed recycle acid waste heat can be achieved, and meanwhile, the ideal effect that fresh water consumption is nearly zero can be achieved.

Description

technical field [0001] The invention relates to the technical field of chemical industry, in particular to a method for utilizing waste heat of absorbing circulating acid in a sulfuric acid process. Background technique [0002] In the two-turn-two-suction process of the sulfuric acid process, the acid heat of the absorption cycle in the absorption process mainly comes from flue gas sensible heat, SO 3 Heat of absorption, heat of sulfuric acid formation and heat of dilution, in order to maintain SO in the absorption tower 3 Stable and efficient absorption, it is necessary to keep the temperature, flow rate and concentration of the absorption acid entering the tower relatively stable, the acid exiting the tower enters the circulation tank, the acid concentration is adjusted through series acid and water addition, and the absorption acid circulation pump is sent to the anode protection acid cooler for removal After heat removal, the acid is evenly distributed to the packing l...

Claims

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Application Information

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IPC IPC(8): F24D3/02F24D3/10F24D19/00F25D17/02
CPCF24D3/02F24D3/1058F24D19/00F25D17/02
Inventor 孟兆忠那日苏王金禹王晓东张东升王国军韩志魏立强贾吉国陈爱武王立军
Owner CHIFENG YUNTONG NONFERROUS METALS
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