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Method for recycling sulfur through Claus direct-flow method

A direct current method, sulfur technology, applied in the field of sulfur recovery, Claus method to recover sulfur, to achieve the effect of improving the sulfur recovery rate, reducing the entry into the reactor, and saving costs

Active Publication Date: 2017-05-31
CHENGDU GRACE FIBER
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0009] The present invention aims to solve the problem of the temperature rise of acid gas from the sulfur cooler to the reactor section in the Claus method for recovering sulfur in the prior art. The problem of temperature rise from the reactor to the reactor section can also ensure a high sulfur recovery rate

Method used

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  • Method for recycling sulfur through Claus direct-flow method

Examples

Experimental program
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Effect test

Embodiment 1

[0034] A method for recovering sulfur by Claus DC method includes the following method steps:

[0035] A. The combustion furnace is connected to the waste heat boiler, and the combustion furnace is connected to the high-temperature acid gas inlets of the first gas-gas heat exchanger, the second gas-gas heat exchanger and the third gas-gas heat exchanger through the high-temperature acid gas flow control valve The waste heat boiler is connected to the presulfur cooler; the high temperature acid gas in the combustion furnace enters the first gas heat exchanger, and the low temperature acid gas in the waste heat boiler enters the first gas heat exchanger through the presulfur cooler A gas-to-gas heat exchanger, where two acid gases in the first gas-to-gas heat exchanger perform gas-to-gas heat exchange;

[0036] B. The low-temperature acid gas outlet of the first gas-gas heat exchanger is connected to the first-stage reactor, and the high-temperature acid gas outlet of the first gas-g...

Embodiment 2

[0041] On the basis of Example 1:

[0042] Preferably, in step A, the temperature of the high-temperature acid gas in the combustion furnace is 1000°C.

[0043] Preferably, in step B, the temperature of the low-temperature acid gas in the waste heat boiler is 340°C, and the temperature of the low-temperature acid gas after passing through the presulfur cooler is 140°C.

[0044] Preferably, in step C, the temperature of the low-temperature acid gas entering the first-stage reactor is 280°C.

[0045] Preferably, in step D, the temperature of the low-temperature acid gas entering the secondary reactor is 250°C.

[0046] Preferably, in step E, the temperature of the low-temperature acid gas entering the three-stage reactor is 180°C.

Embodiment 3

[0048] On the basis of Example 1:

[0049] Preferably, in step A, the temperature of the high-temperature acid gas in the combustion furnace is 1200°C.

[0050] Preferably, in step B, the temperature of the low-temperature acid gas in the waste heat boiler is 350°C, and the temperature of the low-temperature acid gas after passing through the presulfur cooler is 160°C.

[0051] Preferably, in step C, the temperature of the low-temperature acid gas entering the first-stage reactor is 310°C.

[0052] Preferably, in step D, the temperature of the low-temperature acid gas entering the secondary reactor is 280°C.

[0053] Preferably, in step E, the temperature of the low-temperature acid gas entering the three-stage reactor is 200°C.

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Abstract

The invention relates to a method for recycling sulfur through the Claus direct-flow method, and belongs to the technical field of Claus sulfur recycling. By arrangement of three stages of reactors and three stages of gas-gas heat exchangers and combination of a reactor temperature adjusting valve and a reactor temperature transducer, high temperature acidic gas and low temperature acidic gas exchange heat in a system, thus recycling sulfur, solving the problem of temperature rise of the acidic gas from a sulfur condenser to a reactor section, reducing the volume of high concentration acidic gas entering the reactors, increasing the recycling rate of sulfur, reducing energy consumption and saving the cost; the recycling rate of the sulfur is increased to 96 to 99 percent, which is 94 to 97 percent higher than recycling rate of sulfur in the conventional Claus direct-flow method.

Description

Technical field [0001] The present invention relates to a method for recovering sulfur, more specifically, the present invention relates to a method for recovering sulfur by Claus DC method, belonging to the technical field of sulfur recovery by Claus method. Background technique [0002] The Claus process is the most widely used and most efficient process for treating hydrogen sulfide acid gas and recovering sulfur. 2 After S acid gas is buffered, in the combustion furnace, by supplementing an appropriate amount of air, the H 2 S is not fully burned in the combustion furnace, H 2 Part of S burned into SO 2 , Adjust the air intake. H in the combustion furnace 2 S and SO 2 The ratio is 2:1, H 2 S and SO 2 The oxidation-reduction reaction occurs at the combustion temperature, and gaseous elemental sulfur (sulfur) can be obtained. The mixed waste gas passes through a sulfur cooler to cool the gaseous elemental sulfur into liquid sulfur. At this time, the acid gas includes H 2 S, SO ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01B17/04
CPCC01B17/0404Y02P20/10Y02P20/129
Inventor 冷衍辉龙国强辜庆玲陈培山李兵
Owner CHENGDU GRACE FIBER
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