CN1099507C - Caustic sludge drying accelerating method - Google Patents
Caustic sludge drying accelerating method Download PDFInfo
- Publication number
- CN1099507C CN1099507C CN97102795A CN97102795A CN1099507C CN 1099507 C CN1099507 C CN 1099507C CN 97102795 A CN97102795 A CN 97102795A CN 97102795 A CN97102795 A CN 97102795A CN 1099507 C CN1099507 C CN 1099507C
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- CN
- China
- Prior art keywords
- acid
- alkaline residue
- caustic sludge
- agent
- salt
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
- Y02W30/00—Technologies for solid waste management
- Y02W30/50—Reuse, recycling or recovery technologies
- Y02W30/91—Use of waste materials as fillers for mortars or concrete
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- Treatment Of Sludge (AREA)
- Processing Of Solid Wastes (AREA)
Abstract
The present invention relates to a method for accelerating the drying of caustic sludge. A drying agent is added in the caustic sludge to accelerate the drying of the caustic sludge, and the drying agent is composed of 20 to 60 wt% of acid, 10 to 40 wt% of salt and 10 to 40 wt% of flocculating agent. The adding quantity of the drying agent is 0.1 to 10% of the weight of the caustic sludge. The method can greatly reduce the drying time of the caustic sludge and provide a feasible way for the reasonable utilization of the caustic sludge, the reduction of environmental pollution and marine reclamation land.
Description
Technical field
The present invention relates to a kind of processing method of industrial discharge refuse alkaline residue, specifically provide a kind of alkaline residue that quickens and do solid method.Utilize this method can handle the alkaline residue refuse effectively, carry out marine reclamation land.
Background technology
Alkaline residue mainly is meant the liquid and waste slag produced of ammonia alkali factory discharging, and its suspension is coloured turbid liquid, and the pH value is 10.4～11.43, and relative density is 1.11～1.13 gram per centimeters
3, main component is calcium chloride and sodium chloride, and waste residue is white paste, and bulk specific weight is about 1.27 gram per centimeters
3, main component is a large amount of calcium salt, magnesium salts, sodium salt, iron oxide and acid non-soluble substance, the pH value is 9.6～12.5.At present, ammonia alkali factory in countries in the world adopts the discharge liquid and the method for slag respectively admittedly mostly to liquid and waste slag produced processing, and solid slag is adopted the debris retaining of building a dam, and methods such as sedimentation basin are built in marine reclamation land, store up in the defined area; Waste liquid then through clarification, separates, and enters waters such as rivers,lakes and seas after the processing, as French Dun Ba factory under the Solvay of West Europe and Belgian Gu Ye factory, is on the verge of Lay bacterium riverside, and two factories all adopt to build a dam and deposit slag, the method in waste liquid row river; Gondola Luo Xilvenuo factory build the seashore in, adopts the method for mixing the row sea; The former Soviet Union and East Bloc adopt builds large-scale core pool, the method for slag tip; Japan carries out marine reclamation land with the stifled slag of box dam; Several big alkali factory of China mainly also is to adopt to fill out extra large method and toward the method for discharging in the sea.But do admittedly because alkaline residue is difficult to nature, place and also be difficult for doing after the several years solid, if be used for marine reclamation land, must bank up for a long time, it is very slow not only to make ground speed, and because of at the bottom of the deposit intensity, it is difficult to have use value with making.Also there is report to utilize the alkaline residue waste material to make the filler of constructional materials, betterment of land agent, fertilizer or feed addictive etc., but excessive because of investing, the product cost after the processing is too high, still lacks and implements in industry.Reduce these emissions to environment, particularly to the pollution of ocean, be that people pay close attention to always, and the problem that waits to solve.
Summary of the invention
The purpose of this invention is to provide a kind of alkaline residue that quickens and do solid method, it is solid to utilize this method that alkaline residue is done rapidly in a short time, and the alkaline residue compressive strength after doing admittedly can reach the level of backfill, make the purpose of utilizing alkaline residue to realize marine reclamation land, for rationally using alkaline residue, reduce the alkaline residue refuse a feasible approach is opened up in the pollution of environment.
The method of caustic sludge drying accelerating of the present invention is to adopt to add solidating agent to quicken the dried solid method of alkaline residue in alkaline residue.Its used solidating agent is made up of acid, salt and flocculant, and the weight proportion of each component is acid: 20～60%, and salt 10～40%, flocculant: 10～40%; The addition of solidating agent press alkaline residue heavy 0.1～10%.The solidating agent that uses in the inventive method, wherein acid constituents is mainly the alkalescence that changes alkaline residue, also play simultaneously salt component in the change alkaline residue, reach its dry and solid characterisc of change, used sour available inorganic acid or organic acid, example hydrochloric acid, sulfuric acid, nitric acid or acetic acid can contain acid waste liquid as acid constituents with the discharging that can be used as acid industry especially, so not only can administer alkaline residue, play the purpose of the acidic materials waste liquid of handling the acid industry discharging simultaneously again.As acid constituents, preferable acid is sulfuric acid.Salt in the solidating agent can be various inorganic salts, but preferably selects sulfate for use, can improve the composition of alkaline residue so effectively, improves the solid speed of doing.The purpose of flocculant interpolation is to promote to do solid speed, and can raising to a certain degree do the compressive strength of back alkaline residue admittedly, improves the compressive property on the ground of making, when sulfuric acid is adopted in the acid constituents of solidating agent, and can be in the solidating agent not with the salt component.The material that can make flocculant has inorganic salts aluminum sulfate, organic matter shitosan or polyacrylamide etc., particularly can make its composition with the waste material that contains above-mentioned substance, can fall the cost of bottom reason alkaline residue significantly, reaches the purpose that marine reclamation land reduces pollution again.
The specific embodiment
Method implementation process of the present invention is very simple, acid, salt and flocculant are hybridly prepared into solidating agent in proportion after, sneak in the alkaline residue, if can stir solidating agent and alkaline residue are mixed, it is better that it does solid effect.Below by implementing side technology of the present invention is given to illustrate further.
Example 1 alkaline residue is done and is tested 1 admittedly
The discharging waste residue that alkaline residue adopts alkali factory of Dalian Chemical Industry Co to provide, bulk specific weight is about 1.27 gram per centimeters
3, the pH value is 9.6～12.5.In beaker, place 10 gram alkaline residues, put into weight ratio and be 0.1% nitric acid, 5% aluminum sulfate, the polyacrylamide of 500ppm was placed 72 hours at normal temperatures and pressures, just can obtain about 1.8～2.2 kilograms per centimeter of compressive strength
2Dried solid alkaline residue.
Example 2 alkaline residues are done and are tested 2 admittedly
Dig on ground 2.5 meters square, dark about 2 meters hole, in the hole, put into the alkaline residue of about 20 tons of heavy examples 1, put into about 1.2 cubic metres solidating agent aqueous solution then and (include 20 kilograms of hydrochloric acid, 10 kilograms of aluminum sulfate), naturally place after 10 days and observe, the edge takes place dry and cracked, and compressive strength can reach 1.5 kilograms per centimeter
2
Comparative example
Example 1 described alkaline residue does not add solidating agent by example 2 the same terms and stacks naturally and just can reach the identical effect of example 2 after 4～5 years.
Result by above-mentioned example and comparative example shows, adopts method of the present invention can quicken the solid time of doing of alkaline residue greatly, for rationally utilizing alkaline residue, reduces the pollution to environment, and marine reclamation land provides a feasible approach.
Claims (3)
1. the method for a caustic sludge drying accelerating, it is characterized in that it being to add solidating agent to impel it to add rapid-curing cutback admittedly in alkaline residue, solidating agent is made up of acid, salt and flocculant, and the percentage by weight of each component is acid: 20～60%, salt: 10～40%, flocculant: 10～40%; The addition of solidating agent be alkaline residue heavy 0.1～10%.
2. by the described method of claim 1, it is characterized in that acid hydrochloric acid, sulfuric acid, nitric acid or acetic acid in the solidating agent; Salt sulfate; Flocculant aluminum sulfate, shitosan or polyacrylamide.
3. in accordance with the method for claim 2, it is characterized in that acid adopts the acid waste liquid that contains of acid industry discharging to do acid constituents in the solidating agent.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN97102795A CN1099507C (en) | 1997-04-30 | 1997-04-30 | Caustic sludge drying accelerating method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN97102795A CN1099507C (en) | 1997-04-30 | 1997-04-30 | Caustic sludge drying accelerating method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1197872A CN1197872A (en) | 1998-11-04 |
| CN1099507C true CN1099507C (en) | 2003-01-22 |
Family
ID=5166450
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN97102795A Expired - Fee Related CN1099507C (en) | 1997-04-30 | 1997-04-30 | Caustic sludge drying accelerating method |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1099507C (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103318995B (en) * | 2013-05-29 | 2014-08-06 | 武汉工程大学 | Method for improving industrial waste alkali residue slurry flocculation effect |
| CN104652404B (en) * | 2015-01-25 | 2017-02-22 | 丁思华 | Method for carrying out resource utilization on caustic slag after physical dehydrating |
| CN108729436A (en) * | 2017-04-19 | 2018-11-02 | 连云港港口工程设计研究院有限公司 | A kind of quick consolidation method suitable for silt soft foundation |
-
1997
- 1997-04-30 CN CN97102795A patent/CN1099507C/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| CN1197872A (en) | 1998-11-04 |
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| CF01 | Termination of patent right due to non-payment of annual fee |