A kind of treatment method and device of oil refining alkali residue

A technology for refining alkali residue and treatment method, applied in separation methods, gas treatment, natural water treatment and other directions, can solve the problems of inability to achieve efficient oxidation of organic sulfur, high cost, and achieve good catalytic oxidation desulfurization effect, high selectivity, and avoidance. effect of poison

Active Publication Date: 2022-07-12
CHINA PETROLEUM & CHEM CORP +1
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

CN105992633 discloses a catalytic oxidation system for gas containing hydrogen sulfide, using a combination of non-precious metal catalysts and noble metal catalysts to achieve H 2 S, COS and CS 2 Oxidation of organic sulfur can be achieved above 320°C / 360°C, but non-precious metal catalysts cannot achieve efficient oxidation of organic sulfur, and need to be combined with noble metal catalysts, the cost is high

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  • A kind of treatment method and device of oil refining alkali residue

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Effect test

Embodiment 1

[0045] An oil refinery uses figure 1 The process described acidizing the mixed alkali residue waste liquid of catalytic gasoline and liquid hydrocarbons. The specific process is as follows:

[0046] (1) Use sulfuric acid to acidify the alkali residue waste liquid, the maximum processing capacity of the alkali residue is 1t / h, and air is introduced as degassing, and the pH value of the primary acidification is controlled to be 9-11, and the gas volume of the first waste gas stream is generated. 10-50Nm 3 / h, in which the volume concentration of organic sulfides is 5%-30%, and the total non-methane hydrocarbons are 3000-80000 mg / m 3 , the concentration of volatile phenol is 1000-30000mg / m 3 . After the primary acidification treatment, the waste liquid is mixed with concentrated sulfuric acid into the secondary acidification reactor, and nitrogen is introduced as degassing, and the pH value of the secondary acidification is controlled to be 3-4, and the gas volume of the seco...

Embodiment 2

[0055] The same as in Example 1, the difference lies in that in step (2) the desulfurization reactor is filled with different catalysts. The catalyst preparation process is: the same as the preparation method of the catalyst in Example 1, except that the active component precursor solution is prepared in the molar ratio of V: ​​Cu=1: 1, wherein the concentration of ammonium metavanadate is 0.52 mol / L, and the nitric acid is 0.52 mol / L. The concentration of copper was 0.52 mol / L. In the catalyst, the content of SSZ-13 molecular sieve is 1.2% in terms of honeycomb carrier mass, the content of active components in terms of vanadium pentoxide is 0.136%, and the content of copper oxide is 0.116%. In order to meet the treatment effect of hydrogen sulfide and organic sulfide in the first exhaust gas, it is necessary to reduce the volume space velocity of the catalyst bed of the desulfurization reactor to 10000h -1 , and increase the reaction temperature to 300-320 °C. The device ha...

Embodiment 3

[0057] The same as in Example 1, the difference lies in that in step (2) the desulfurization reactor is filled with different catalysts. The preparation process of the catalyst is as follows: the preparation method of the catalyst in Example 1 is the same, except that the active component precursor solution is prepared according to the molar ratio of V:Ce=1:0.2, wherein the concentration of ammonium metavanadate is 0.52mol / L, and the concentration of nitric acid is 0.52mol / L. The concentration of cerium was 0.104 mol / L. In the catalyst, the content of SSZ-13 molecular sieve is 1.2% in terms of honeycomb carrier mass, the content of active components in terms of vanadium pentoxide is 0.136%, and the content of copper oxide is 0.116%. In order to meet the treatment effect of hydrogen sulfide and organic sulfide in the first exhaust gas, it is necessary to reduce the volume space velocity of the catalyst bed of the desulfurization reactor to 8000h -1 , and the reaction temperatu...

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Abstract

The invention relates to a treatment method and device for oil refining alkali residue. The alkali residue and sulfuric acid are acidified in two stages in an acidification unit to generate a first waste gas flow and a second waste gas flow; a part of the second waste gas flow is combined with the first waste gas After the reaction is completed, the third waste gas flow is discharged; the third waste gas flow is mixed with the remaining part of the second waste gas flow and sent to the sulfur production unit for reaction, and the fourth waste gas flow is discharged after the reaction; Four exhaust gas flows into SO 2 In the adsorption unit, a fifth waste gas flow is generated, and the regeneration gas is merged into the third waste gas flow; the fifth waste gas flow is sent to the catalytic oxidation dehydrocarbonation unit, and the purified gas is discharged. The invention avoids the toxic effect of sulfide on the catalytic oxidation dehydrocarbon catalyst, can maintain the long-term stable operation of the catalytic oxidation unit, and can recover high-quality sulfur resources with better economy.

Description

technical field [0001] The invention belongs to the technical field of wastewater treatment, and in particular relates to a method and a device for treating alkali residues in oil refining. Background technique [0002] In the process of alkali washing and refining of oil products in refineries, alkaline waste liquid containing high concentrations of pollutants will be produced, and the discharge of COD, sulfide and phenol accounts for more than 40%-50% of the discharge of such pollutants in the refinery . If these alkali residue waste liquids are directly discharged, they will seriously pollute the environment; if they are sent to the sewage treatment plant, it will seriously affect the normal operation of the sewage treatment plant, making it difficult to discharge the sewage up to the standard, and seriously corrode the equipment. Due to the particularity of the composition of the alkali residue waste liquid, acidification or neutralization pretreatment is generally used...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C02F9/04C02F1/66B01D53/75B01D53/86B01D53/04B01D53/48B01D53/52B01D53/72C01B17/04C10G19/08C02F101/10C02F101/30
CPCC02F1/20C02F1/66B01D53/75B01D53/8603B01D53/869B01D53/8668B01D53/8687B01D53/8612B01D53/04C01B17/04C10G19/08C02F2103/365B01D2257/30B01D2257/702B01D2257/70B01D2257/708B01D2257/306B01D2255/50B01D2257/304B01D2255/20723B01D2255/20761B01D2255/2065B01D2255/20707B01D2255/2092B01D2253/102C02F2101/101C02F2101/40Y02A50/20
Inventor 赵磊汪鹏刘志禹王新刘忠生
Owner CHINA PETROLEUM & CHEM CORP
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