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Resource comprehensive utilization method of refining alkaline slag

A technology of alkali slag and refining, which is applied in the field of comprehensive resource utilization of refining and chemical alkali slag, which can solve the problems of waste of inorganic salts such as sodium sulfate, weak research foundation, and restriction of the development of alkali slag, and achieve industrial water saving and safe and reliable operation Low management and processing costs

Active Publication Date: 2018-09-14
CHAMBROAD CHEM IND RES INST CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, the domestic research base on the biological treatment of alkali slag is relatively weak, and there are fewer studies on the comprehensive utilization of various alkali slag, which severely limits the development of the comprehensive utilization technology of alkali slag to a certain extent.
Chinese patent ZL 200710150191.X discloses a treatment method for alkali slag. The alkali slag is pretreated, and the harmful substances in the alkali slag are further degraded by biological oxidation. Use more than 10 times fresh water to dilute the alkali slag, and the treated wastewater enters the comprehensive treatment plant, resulting in waste of inorganic salts such as sodium sulfate and secondary pollution
Chinese patent 201710205495.5 discloses a treatment system and treatment method for alkali slag wastewater in oil refineries. Also through pretreatment, denitrification and aerobic methods are used to degrade harmful substances in alkali slag, and the treated wastewater enters the integrated system for treatment After discharge, the invention needs to dilute the alkali slag with more than 20 times of fresh water, and the treated wastewater enters the comprehensive treatment plant, resulting in waste of inorganic salts such as sodium sulfate and secondary pollution
[0005] At present, there is no report on the recovery of sodium sulfate from alkali slag at home and abroad

Method used

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  • Resource comprehensive utilization method of refining alkaline slag
  • Resource comprehensive utilization method of refining alkaline slag
  • Resource comprehensive utilization method of refining alkaline slag

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0039] The specific indicators of the liquefied gas alkali slag of a refining and chemical enterprise are shown in Table 1:

[0040] Table 1. Liquefied petroleum gas alkali residue index

[0041]

[0042]

[0043] The low-concentration acidic water indicators are shown in Table 2:

[0044] Table 2. Low-concentration acidic water indicators

[0045]

[0046] 1) The alkali residue of liquefied gas enters the adjustment tank through the metering pump and 50% sulfuric acid at the same time. The volume ratio of alkali residue to sulfuric acid is 25:1, and the pH value after full reaction is 10.4. The organic phase enters the organic phase storage tank through the overflow. After dehydration, the water phase of alkali residue enters the water phase storage tank.

[0047] 2) The alkaline residue water phase enters the internal circulation aerobic bioreactor from the water phase storage tank through the metering pump. The volume ratio of the alkaline residue water phase to the low-concentratio...

Embodiment 2

[0052] The specific indicators of gasoline alkali residue from a refinery and chemical enterprise are shown in Table 3:

[0053] Table 3. Indicators of gasoline alkali residue

[0054]

[0055] The low-concentration acidic water indicators are shown in Table 4:

[0056] Table 4. Low-concentration acidic water indicators

[0057]

[0058] 1) Gasoline alkali residue enters the adjustment tank simultaneously with 30% sulfuric acid through a metering pump. The volume ratio of alkali residue to sulfuric acid is 15:1. After full reaction, the pH value is about 9.2. The organic phase enters the organic phase storage tank through the overflow and is dehydrated. After refining, the alkaline residue water phase enters the water phase storage tank.

[0059] 2) The alkali residue water phase enters the internal circulation aerobic bioreactor from the water phase storage tank via the metering pump. The volume ratio of the alkali residue water phase to the low-concentration acidic water is 1:4. Set ...

Embodiment 3

[0064] For the diesel soda slag of a refining and chemical enterprise, the specific indicators are shown in Table 5:

[0065] Table 5. Diesel alkali residue indicators

[0066]

[0067] See Table 6 for low-concentration acidic water indicators:

[0068] Table 6. Low-concentration acidic water indicators

[0069]

[0070] 1) The alkali residue of liquefied gas enters the adjustment tank simultaneously with 98% sulfuric acid through a metering pump. The volume ratio of alkali residue to sulfuric acid is 50:1, and the pH value after full reaction is 9.7. The organic phase enters the organic phase storage tank through the overflow. After dehydration and refining, the aqueous phase of alkali residue enters the water phase storage tank.

[0071] 2) The alkali residue water phase enters the internal circulation aerobic bioreactor from the water phase storage tank via the metering pump. The volume ratio of the alkali residue water phase to the low-concentration acid water is 1:6. Set the volum...

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Abstract

The invention belongs to the technical field of biochemical environment protection, and concretely provides a resource comprehensive utilization method of refining alkaline slag. The method mainly ischaracterized in that the refining alkaline slag is subjected to pretreatment, biochemical treatment, post treatment, evaporative crystallization and tail gas treatment to finally realize the organicphase reprocessing utilization; the tail gas is exhausted in a standard reaching way; meanwhile, sodium sulfate products are recovered at the same time; the utilization maximization of resources is realized. The method provided by the invention has the advantages that the process is reasonable; the cost is low; the implementation is easy; good economic benefits, environment benefits and social benefits are realized.

Description

Technical field [0001] The invention belongs to the technical field of biochemical environmental protection, and specifically relates to a method for comprehensive utilization of resources of refining alkali residue. Background technique [0002] The alkali residue wastewater in the petrochemical industry is caused by the reaction of lye with S, N, 0 and other compounds in the process of caustic washing of liquefied petroleum gas, diesel, gasoline, etc., to remove the substances that affect its stability and some sulfur-containing compounds. After the action, the alkali residue contains a lot of pollutants, and its COD can usually reach tens of thousands or even hundreds of thousands, and it also contains a lot of toxic and harmful substances such as sulfides and phenols. The treatment method has always been environmental treatment in the chemical industry. A big problem. [0003] For alkali slag wastewater, different methods are used at home and abroad to treat it. In summary, th...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F9/14C02F103/36
CPCB01D53/84C02F1/001C02F1/04C02F1/283C02F1/5236C02F1/56C02F1/66C02F1/722C02F3/02C02F9/00C02F2001/007C02F2103/365C02F2305/026
Inventor 杨传伦刘圣鹏陈梅梅张心青秦培广王春王建平任晓燕傅英旬车树刚韩立霞
Owner CHAMBROAD CHEM IND RES INST CO LTD
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