CN1089258C - Comprehensive utilization method of waste acid sludge - Google Patents
Comprehensive utilization method of waste acid sludge Download PDFInfo
- Publication number
- CN1089258C CN1089258C CN97103241A CN97103241A CN1089258C CN 1089258 C CN1089258 C CN 1089258C CN 97103241 A CN97103241 A CN 97103241A CN 97103241 A CN97103241 A CN 97103241A CN 1089258 C CN1089258 C CN 1089258C
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- China
- Prior art keywords
- heavy oil
- waste acid
- acid sludge
- oil
- fuel
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- Treatment Of Sludge (AREA)
- Production Of Liquid Hydrocarbon Mixture For Refining Petroleum (AREA)
Abstract
The present invention relates to a method for comprehensively using waste acid dregs generated in the process of acid and alkali refinement of lubricating oil, which adopts a method of neutralizer addition to process the waste acid dregs and produce fuel heavy oil and industrial mirabilite. Sulfur in the fuel heavy oil is separated, and the problem of environmental pollution is solved. The method has the advantages of simple process, convenient operation and energy saving.
Description
The invention relates to a method for comprehensively utilizing waste acid sludge generated in the process of refining lubricating oil acid and alkali, in particular to a method for producing fuel heavy oil and industrial mirabilite by treating the waste acid sludge.
At present, a large amount of waste acid sludge is generated in the acid-base refining process of producing lubricating oil in China, and the waste acid sludge is not easy to treat, so that serious environmental pollution can be caused.
Aiming at the situation, the invention adopts a method of adding neutralizing liquid to treat the waste acid sludge, and the produced fuel heavy oil and industrial mirabilite separate the sulfur in the fuel heavy oil, thereby solving the problem of environmental pollution.
The invention is realized by the following steps (as shown in the figure): a process for comprehensive utilization of waste acid dregs includes such steps as adding the neutralizing liquid in same volume to acid dregs, reaction for 48 hr, heating for 6-8 hr, deposition for 4 hr, discharging the aqueous solution containing sodium sulfate, and cooling to ordinary temp to crystallize sodium sulfate to obtain industrial mirabilite. After the dirty oil is separated from the crystallized sewage, the water is recycled to prepare the neutralization solution. The dehydrated fuel heavy oil is blended into 1/3-1/2 recovered dirty oil and fully stirred to form the fuel heavy oil.
The formula of the neutralizing solution is as follows: solid sodium carbonate 10 wt% and 42% concentration sodium hydroxide 90 wt%, and compressed air produced with air pump is used to mix and add water to reach Baume degree of 15-18 deg.
The dosage of the neutralization solution is as follows: the pH value of the acid sludge is 7-7.5 after 1 cubic meter of neutralization solution is added into 1 cubic meter of acid sludge for neutralization.
The reaction principle is as follows:
reaction conditions are as follows:
the reaction is slowly carried out at normal temperature for 48 hours, so as to be beneficial to the formation of carbon dioxide (CO)2) Can generate capillary pores in acid sludge after reaction, and the formed sodium sulfate (Na) can be heated for 8 to 10 hours after the reaction2SO4) Dissolving in water from capillary pores, precipitating for 4 hr, discharging water, and heating to dehydrate at 85-95 deg.C. After draining, 1/3-1/2 kinds of recovered dirty oil should be added into the fuel to improve the carbon-hydrogen ratio in the heavy fuel oil and increase the calorific value of the heavy fuel oil, and the calorific value is not lower than 9000 kilocalories.
Further described in conjunction with the process flow diagram:
adding the neutralization solution with the same volume into the acid sludge, reacting for 48 hours, heating for 6-8 hours at 85-95 ℃, precipitating for 4 hours, discharging the aqueous solution containing sodium sulfate, and cooling the discharged aqueous solution of sodium sulfate to normal temperature to crystallize sodium sulfate to form industrial mirabilite. And separating dirty oil from the crystallized sewage, circularly preparing a neutralization solution from the part of the water, blending the dehydrated fuel heavy oil into 1/3-1/2 of recovered dirty oil, and fully stirring to form the fuel heavy oil.
The invention changes waste into valuable, solves the problem of environmental pollution caused by acid sludge, and has the advantages of simple process, simple equipment, convenient operation and energy conservation.
One embodiment is described: 300 g of acid sludge is put into a 1000 ml beaker in a laboratory, 300 g of neutralization solution is added under the normal temperature condition for slow reaction for 48 hours, the mixture is heated to 90 ℃ by an electric heater and stirred for 20 minutes, after the acid sludge is completely melted, the mixture is precipitated for 4 hours, water solution is discharged by a water suction pipe, sodium sulfate (industrial mirabilite) is crystallized after the discharged water solution is cooled, and finally 1/3 dirty oil is blended into the discharged oil and stirred evenly to form the fuel heavy oil.
The characteristics of the fuel heavy oil: the sulfur content in the acid sludge is reduced from more than 12.6 percent to 0.58 percent, and the method completely meets the requirement of national standard on 3 percent of the sulfur content in the fuel heavy oil.
Claims (1)
1. A method for comprehensively utilizing waste acid sludge is characterized by comprising the following steps: adding 10% solid sodium carbonate and 90% 42% sodium hydroxide neutralizing solution into waste acid residue produced in the refining process of lubricating oil acid-base, slowly reacting at normal temperature for 48 hr to form carbon dioxide (CO)2) Capillary pores can be generated in acid sludge after reaction, and sodium sulfate (Na) can be formed by heating for 8 to 10 hours after reaction2SO4) Dissolving in water from capillary pores, precipitating for 4 hr, discharging water, heating to dewater at 85-95 deg.C, adding 1/3-1/2 kinds of recovered dirty oil to improve fuel qualityThe carbon-hydrogen ratio in the heavy oil improves the heating value of the fuel heavy oil, the heating value is not lower than 9000 kilocalories, the fuel heavy oil is produced by processing, and the industrial mirabilite separates out the sulfur in the fuel heavy oil, thereby solving the problem of environmental pollution.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN97103241A CN1089258C (en) | 1997-04-09 | 1997-04-09 | Comprehensive utilization method of waste acid sludge |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN97103241A CN1089258C (en) | 1997-04-09 | 1997-04-09 | Comprehensive utilization method of waste acid sludge |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1195564A CN1195564A (en) | 1998-10-14 |
| CN1089258C true CN1089258C (en) | 2002-08-21 |
Family
ID=5166598
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN97103241A Expired - Fee Related CN1089258C (en) | 1997-04-09 | 1997-04-09 | Comprehensive utilization method of waste acid sludge |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1089258C (en) |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1073965A (en) * | 1992-01-03 | 1993-07-07 | 赵芝贵 | A kind of acid sludge comprehensive utilization method |
| CN1123317A (en) * | 1995-08-30 | 1996-05-29 | 陈旸 | Technology for oxidation-reduction and regeneration of lubricating oil |
-
1997
- 1997-04-09 CN CN97103241A patent/CN1089258C/en not_active Expired - Fee Related
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1073965A (en) * | 1992-01-03 | 1993-07-07 | 赵芝贵 | A kind of acid sludge comprehensive utilization method |
| CN1123317A (en) * | 1995-08-30 | 1996-05-29 | 陈旸 | Technology for oxidation-reduction and regeneration of lubricating oil |
Also Published As
| Publication number | Publication date |
|---|---|
| CN1195564A (en) | 1998-10-14 |
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