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Intensive energy-saving sulfur trioxide gas cooling system for sulfonation process and cooling method thereof

A sulfur trioxide and gas cooling technology, applied in the steam generation method using heat carrier, heat exchanger type, fixed tubular conduit assembly, etc., can solve the problem of discounted heat recovery effect, low heat exchange efficiency, and gas-gas exchange Problems such as large heat transfer resistance, etc., achieve the effect of improving operational safety, improving steam grade, and reducing equipment investment

Pending Publication Date: 2021-09-03
HANGZHOU PROJECT & RES INST OF ELECTRO MECHANIC & LIGHT IND
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This process is currently widely used in the industry. Its advantages lie in its large operating flexibility and mature equipment. The existing problems are that there are many process links, the heat transfer resistance of gas-gas heat exchange is large, the number of equipment pipes is large, and the size is large, which increases the equipment. Investment, more importantly, the indirect heat exchange using air as the intermediate heat carrier, the heat exchange efficiency is low, and the intermediate link of air is added, which greatly reduces the effect of heat recovery
The above reasons limit the selectivity of the process route

Method used

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  • Intensive energy-saving sulfur trioxide gas cooling system for sulfonation process and cooling method thereof
  • Intensive energy-saving sulfur trioxide gas cooling system for sulfonation process and cooling method thereof
  • Intensive energy-saving sulfur trioxide gas cooling system for sulfonation process and cooling method thereof

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Experimental program
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Effect test

Embodiment 1

[0032] The intensive and energy-saving sulfur trioxide gas cooling system used in the sulfonation process described in this embodiment includes a sulfur trioxide conversion tower outlet 1 and a sulfur trioxide heat recovery device 2, and the sulfur trioxide heat recovery device 2 consists of the first A heat recovery device formed by connecting the first-stage heat exchanger 21 and the second-stage heat exchanger 22 in series. The heat recovery device is an inclined structure with an angle of 1° to 5° between the center line and the horizontal plane. It includes the first Stage tube box 201, first stage tube pass outlet 202, outer tube sheet 203, first stage effusion chamber, inner tube sheet 205, second stage effusion chamber, shell side inlet 206, cylinder body 207, first stage replacement Heat pipe 208, shell-side outlet 209, second-stage tube-side outlet 210, second-stage tube box 211, split-pass partition 212, second-stage tube-side inlet 213, second-stage liquid effusion ...

Embodiment 2

[0041] In the intensive and energy-saving sulfur trioxide gas cooling system used in the sulfonation process described in this embodiment, the sulfur trioxide heat recovery device is composed of two separate heat recovery devices. The structure of its heat recovery device is identical with that of embodiment 1. The shell-side inlet of the first-stage heat recovery device is connected with the outlet of the sulfur trioxide conversion tower, and the shell-side outlet of the first-stage heat recovery device is connected with the shell-side outlet of the second-stage heat recovery device. The two tube-side inlets of the two heat recoverers can be connected to the supplementary water pump, at least one of the two tube-side outlets of the first-stage heat recovery device is connected to the steam sub-cylinder, and the first-stage heat recovery unit of the second-stage heat recovery The outlet of the tube pass is connected with the inlet of the second-stage tube pass in the first-sta...

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Abstract

The invention relates to an intensive energy-saving sulfur trioxide gas cooling system for a sulfonation process. The intensive energy-saving sulfur trioxide gas cooling system comprises a sulfur trioxide conversion tower outlet and a sulfur trioxide heat recovery device, wherein the sulfur trioxide heat recovery device is formed by sequentially connecting a first-stage heat exchanger and a second-stage heat exchanger in series, and the first-stage heat exchanger and the second-stage heat exchanger can be combined into one heat exchange device; sulfur trioxide passes through the sulfur trioxide heat recovery device from the sulfur trioxide conversion tower outlet and then is connected to a subsequent sulfonation section, and deionized water is connected to a tube pass inlet of the sulfur trioxide heat recovery device through a make-up pump; a tube pass outlet of the first-stage heat exchanger is connected with a steam header; and a tube pass outlet of the second-stage heat exchanger is connected to a hot water tank. Meanwhile, the invention further designs the structure of the heat recovery device and a cooling method of the whole cooling system. On the premise that safety and operation stability are guaranteed, the technological process is simplified, investment of equipment and pipelines is reduced, and power consumption generated when air serves as a heat carrier is reduced.

Description

technical field [0001] The invention relates to a heat recovery method and a device in the sulfonation (sulfuric acid) production process of anionic surfactants. The invention belongs to chemical production fields such as chemical industry, light industry, pharmacy, energy saving and environmental protection, etc., and can be applied to recover reaction heat in any process of generating sulfur trioxide gas by sulfur burning method. Background technique [0002] The heat transfer process refers to the process of heat transfer between materials, which is widely used in chemical, light industry, pharmaceutical, energy saving and environmental protection and other production fields. Among them, the heat transfer of gas, compared with the heat transfer of liquid, has the characteristics of fast flow rate, large pressure change, and large volume flow change. [0003] In the gas-phase sulfonation production of sulfur trioxide, sulfur reacts with air in the sulfur furnace to genera...

Claims

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Application Information

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IPC IPC(8): F22B1/18F28D7/00
CPCF22B1/18F28D7/00
Inventor 支林轩李峰兰春林张卫民张国华刘清波陈巧花赵东睿
Owner HANGZHOU PROJECT & RES INST OF ELECTRO MECHANIC & LIGHT IND
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