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Double symmetrical shell and tube sulfuric acid cooler

A shell-and-tube, double-symmetrical technology is used in the field of heat exchangers for heat recovery in the cooling process of high-temperature concentrated sulfuric acid, which can solve the problems of inability to detect and leak in time for sulfuric acid coolers

Active Publication Date: 2016-03-02
丁华
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The purpose of the present invention is to solve the problem that the sulfuric acid cooler with high water side pressure cannot be detected in time and reliably judge the leakage, so as to achieve the goals of safe production, equipment protection and convenient maintenance

Method used

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  • Double symmetrical shell and tube sulfuric acid cooler
  • Double symmetrical shell and tube sulfuric acid cooler
  • Double symmetrical shell and tube sulfuric acid cooler

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0051] The double symmetrical shell-and-tube sulfuric acid cooler used in the circulating acid of the low-temperature potential heat recovery tower of a 300,000-ton / year sulfuric acid plant, including the acid inlet pipe box, heat exchange section A, acid connection pipe box, heat exchange section B, and acid outlet Tube boxes and steam drums. The acid goes through the tube side, and the water goes through the shell side. The acid side of the two heat exchange sections is connected by an acid connection box. The steam riser tubes of heat exchange section A and heat exchange section B are connected to the riser tubes extending into the steam drum and support the steam drum, and the water downpipe of the steam drum is drawn from the bottom of the steam drum to the bottom of the shell side of the two heat exchange sections. Water outlet connection. The shell side of the heat exchange section is the process of water evaporation and vaporization. The double symmetrical shell-and-t...

Embodiment 2

[0055] The dual-symmetric shell-and-tube sulfuric acid cooler used in the low-temperature potential heat recovery tower of the 800,000-ton / year sulfuric acid plant, which includes the acid inlet pipe box, heat exchange section A, acid connection pipe box, heat exchange section B, Acid outlet pipe box, connecting water pipe. Connect the acid sides of the two heat exchange sections with the acid connection box, and connect the water sides of the two heat exchange sections with the connecting water pipe. The water goes through the shell side, the acid goes through the tube side, and the full countercurrent heat exchange is used to heat the boiler feed water. The series acid cooler is also called the boiler feed water heater. The string acid concentration is 99.60%, the acid inlet temperature is 180°C, and the outlet temperature is 150°C, heating the boiler feed water from 104°C to 172°C. In stable operation, the acid temperature at the outlet of heat exchange section A (inlet te...

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Abstract

The invention discloses a double-symmetrical-tube-shell type sulfuric acid cooler, and relates to a heat exchanging device for recovering heat in the high-temperature concentrated sulfuric acid cooling process. The double-symmetrical-tube-shell type sulfuric acid cooler comprises two completely-symmetrical and completely-same tube-shell type heat exchanging sections and structurally comprises an acid inlet tube box, the heat exchanging section A, an acid connecting tube box, the heat exchanging section B, an acid outlet tube box and a connecting water tube or steam pocket. If the shell sides of the two heat exchanging sections are connected with the steam pocket, a steam generator is formed, and if the shell sides of the two heat exchanging sections are connected through a tube, a water heater is formed. The temperature values of an acid inlet and an acid outlet and the temperature value of acid in the connecting tube box are measured online, meanwhile, the temperature value of saturated steam or the temperature values of a water inlet and a water outlet and the temperature value of water in the connecting water tube are measured, and the characteristic ratio of the sulfuric acid cooler is calculated through the temperature values. Once leakage occurs, the practical value of the characteristic ratio can be remarkably changed, and therefore the leakage can be monitored.

Description

Technical field: [0001] The invention relates to the technical category of heat exchange equipment in chemical plants, in particular to a heat exchanger for heat recovery in the cooling process of high-temperature concentrated sulfuric acid. Background technique: [0002] Sulfuric acid is formed by the combination of sulfur trioxide and water. Since this reaction is a very violent exothermic reaction, concentrated sulfuric acid at a temperature of about 80°C is used to absorb sulfur trioxide in the gas during the production of sulfuric acid. The absorption process produces Due to the low temperature of the circulating acid, the heat has no use value, and usually can only be cooled by circulating cooling water to discharge the heat to the atmosphere. [0003] To recover and utilize this heat to generate steam or heat boiler feed water to achieve the purpose of waste heat recovery and utilization, it is necessary to increase the temperature of the circulating acid. The curren...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F22B1/16F22B37/38
Inventor 丁华
Owner 丁华
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