Method for removing and utilizing absorption circulating acid heat in sulfuric acid process

A technology of absorption cycle and acid absorption, applied in heating methods, cooling fluid circulation devices, applications, etc., can solve the problems of insufficient utilization of waste heat, waste of water resources, etc., and achieve significant direct and ecological benefits, efficient recycling, and extensive use Promoting the effect of app value

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

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Problems solved by technology

The heat removal and utilization of absorption acid cycle acid, the traditional open circulating cooling water system is adopted to absorb the heat of cycle acid heat removal, usually there are common problems of water resource waste and waste heat can not be fully utilized, sulfuric acid production of low-grade heat energy utilization has been listed in the national 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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  • Method for removing and utilizing absorption circulating acid heat in sulfuric acid process
  • Method for removing and utilizing absorption circulating acid heat in sulfuric acid process

Examples

Experimental program
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Effect test

Embodiment

[0017] A set of this device is respectively connected to the primary absorption tower and the secondary absorption tower. Among them, absorption acid cooler 1# (primary absorption absorption acid cooler) has an acid inlet temperature of 100°C and an acid outlet temperature of 78°C, and the absorption acid cooler 2# (second suction absorption acid cooler) acid inlet temperature 90°C, acid outlet temperature 75°C, cold side inlet water temperature 55°C, outlet water temperature 65°C, closed circulation cooling water unit dry air cooler inlet water temperature 65°C, the outlet water temperature after cooling is 55°C, the cooling water-heating water heat exchanger configured in parallel with the closed cycle cooling water unit has a cold side inlet water (heating water return) temperature of 40°C, and a cold side outlet water (heating water supply water) ) temperature of 60°C. The heat removal task of absorption cycle acid is completed by absorption acid cooler and closed cooling ...

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Abstract

The invention discloses a method for removing and utilizing absorption circulating acid heat in a sulfuric acid process. The method is characterized in that absorption circulating acid is subjected toheat exchange through an absorption acid cooler, after exchanging heat with the absorption circulating acid, cooling water in the absorption acid cooler is outputted to a closed circulating cooling water unit or a waste heat utilizing unit; in a non-heating period, the cooling water subjected to heat exchange is subjected to heat exchange through the closed circulating cooling water unit and thenis conveyed back to the absorption acid cooler; and in the heating period, heating return water in a heating system exchanges heat with the cooling water which enters the waste heat utilizing unit and is subjected to heat exchange, and then the heating return water is conveyed back to the heating system through a heating circulating pump. According to the method, the heat of the absorption circulating acid in the acid making process can be removed, and the ideal effect that the consumption of new water is almost zero can be achieved while the waste heat of the absorption circulating acid is efficiently recycled.

Description

technical field [0001] The invention relates to the technical field of chemical industry, in particular to a method for removing and utilizing heat of absorption cycle 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 Remove heat, and then uniformly distribute acid to the packing la...

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 孟兆忠王金禹那日苏王晓东张东升邵忠民王国军韩志贾吉国
Owner CHIFENG YUNTONG NONFERROUS METALS
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