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Method for producing sulfur through separation, vulcanization and hydrogen oxidation of circling foam

A foam separation and hydrogen sulfide technology, applied in separation methods, chemical instruments and methods, dispersed particle separation, etc., can solve the problems of low sulfur content, increased energy consumption, loss of desulfurization agent, and unsatisfactory separation effect, and achieve desulfurization liquid. Low entrainment, low energy and agent consumption, and low filtrate volume

Active Publication Date: 2013-07-31
PETROCHINA CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] Due to the low content of sulfur in the sedimentation liquid, a large amount of solution is circulated between the separation unit and the reactor, which not only increases the energy consumption and the loss of desulfurization agent, but also the separation effect is not ideal

Method used

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  • Method for producing sulfur through separation, vulcanization and hydrogen oxidation of circling foam

Examples

Experimental program
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specific Embodiment approach

[0020] The loop foam separation tower is composed of a bubbling section 2 and a foam collection section 1. The bubbling section 1 is an airlift inner loop reactor, including a reactor guide tube 6 and a gas distributor 5; the foam collection section 1 is an overflow The trough-type gas-liquid separator is provided with an overflow weir 7 . The diameter ratio of the bubbling section and the foam collection section is 1:1.4~1:1.7, and the height ratio is 1:0.5~1:0.9; the diameter ratio of the overflow tank weir and the foam collection section of the foam collection section is 1:1~1 :1.4, the height ratio is 0.1:1~0.3:1.

[0021] Continuous operation: the surfactant and the solution containing sulfur particles are mixed and then pumped into the circulation foam separation tower, and the air is blown into the circulation reactor guide tube of the bubbling section 2 in the tower through the air inlet pipe 3 and the gas distributor 5 at the bottom of the tower In 6, a stable foam i...

Embodiment 1

[0024] The present embodiment adopts the continuous operation mode, and the circulation foam separates H 2 Sulfur particles obtained by oxidation of S. The average particle size of the sulfur particles is 21 μm, and when the pH is 8-10, the surface potential of the sulfur particles is 10-1 mV. The bubble section of the circulating foam separation tower has a diameter of 170mm and a height of 1300mm. The foam collection section has a diameter of 290mm and a height of 660mm, and the overflow weir has a diameter of 228mm and a height of 100mm. Continuous operation is adopted. After the surfactant SDBS is mixed with the solution containing sulfur particles, it is pumped in from the bottom of the separation tower. After the foam is enriched, it is discharged from the bottom of the foam collection section. After the sulfur is filtered, the filtrate is merged into the desulfurization solution to be separated, and the sulfur is dried and recovered. . The desulfurization solution af...

Embodiment 2

[0026] The present embodiment adopts the batch mode of operation, and the circulating foam separates H 2 Sulfur particles obtained by oxidation of S. The properties of the sulfur granules are the same as in Example 1. The structure of the bubbling section of the circulating foam separation tower is the same as in Example 1, the diameter of the foam collecting section is 240mm, the height is 1000mm, and the overflow weir is 240mm high. The solution containing sulfur particles (with a content of 2g / L) is added to the circulation foam separation device at one time, and the liquid volume in the separation tower is controlled to be 27-30L. Surfactant SDS is fed into the circulating foam separation device at a certain rate to ensure that the content of surfactant is 0.12g per desulfurization solution containing 1g of sulfur particles, and the superficial velocity of air is 1.0cm / s. After 20 minutes of stable operation under the above conditions, the separation rate of sulfur parti...

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Abstract

The invention relates to a method for producing sulfur through separation, vulcanization and hydrogen oxidation of circling foam, which comprises the following steps: adding anionic surfactant into a circling foam separation tower, adjusting the pH to be 8-10, filling air to generate foam, enriching sulphur granules on the surface of the foam, and separating sulfur from the solution through collecting the foam. In the method, the content of surfactant in 1g of solution of the sulphur granules is 0.05-0.14g, the gas flow velocity in the empty tower is 0.5-2.5cm / s, the average grain diameter ofthe separated sulphur granules is 0.5-25 mum, the surfaces of the granules are positive when the pH is 8-10, and the content of the sulphur granules in the solution is no higher than 2g / L. The methodcan adopt continuous operation or batch operation. Compared with settlement separation, the separation rate of the method is high, and the separation rate of the sulphur granules is up to 85 percent.Moreover, the method has the advantages of low solvent entrainment, low energy consumption and low solvent consumption, and has broad application prospects in wet oxidation and absorption of hydrogensulfide.

Description

technical field [0001] The invention belongs to the field of gas purification technology and solid-liquid separation technology. Specifically involves a separation of H from solution 2 A method of oxidizing tiny sulfur particles formed during absorption. Background technique [0002] h 2 S gas is one of the main gases that affect product quality and cause environmental pollution in natural gas, oil refining and chemical industry. in H 2 Among the absorption methods of S, there is a kind of wet oxidation absorption method, which is characterized by using a catalyst to convert H 2 S is oxidized to elemental sulfur, such as vanadium-based oxidation absorption desulfurization process, iron-based oxidation absorption desulfurization process, etc. There are more than one hundred kinds of wet oxidation absorption methods, among which there are more than twenty kinds with industrial application value. This type of method generally has the characteristics of high desulfurizatio...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01D53/52B01D53/14C10G7/04C01B17/04
Inventor 黄洪发蒋国强赵洲洋黄黎明温崇荣江盛阳熊钢丁富新
Owner PETROCHINA CO LTD
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