CN101748415B - Pickler production system and pickler production method - Google Patents
Pickler production system and pickler production method Download PDFInfo
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- CN101748415B CN101748415B CN2008102294343A CN200810229434A CN101748415B CN 101748415 B CN101748415 B CN 101748415B CN 2008102294343 A CN2008102294343 A CN 2008102294343A CN 200810229434 A CN200810229434 A CN 200810229434A CN 101748415 B CN101748415 B CN 101748415B
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- sulfuric acid
- dilute sulfuric
- pump
- dilute
- acid tank
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Abstract
The invention discloses a pickling method related to chemical production and metallurgical production, in particular to a pickler production system and a pickler production method. The pickler production system has the following structure: a concentrated sulfuric acid tank and a dilute sulfuric acid tank are communicated with each other, and the dilute sulfuric acid tank is connected with a dilute acid pump, a lime cream pipe, a fresh water pipe, a movable titanium pump and a neutralization pump. The invention has the following effects: the waste acid can not be discharged out, thereby preventing the environmental pollution; the consumption of the sulfuric acid is low; the pickling time is appropriate; the corrosion to the equipment and the pipeline is low; the safety guarantee is good; and the continuous automated operation is realized. The production method is a method for effective implementation of the pickling safety design, and the laps in the system can be promptly removed, thereby ensuring the normal production; and the invention can ensure the safety of the operating personnel and the equipment during the pickling process.
Description
Technical field
The present invention relates to the acid washing method of Chemical Manufacture and metallurgical production, relate in particular to production system and production method at the alumina producer pickle solution.
Background technology
At present, in alumina producer was produced, no matter adopting sintering process, Bayer process still was the mixed combining method technological process of production, all had the material of a kind of " scabbing " to generate.Its chemical constitution is comparatively complicated, mainly contains following four big classes: 1) because of solution decomposes scabbing of producing, based on aluminium hydroxide; 2) because of scabbing that desilication reaction produces, based on sodium white residue, calcium aluminosilicate hydrate; 3) because of scabbing that titanium mineral high temperature stripping reaction produces, based on calcium titanate; 4) in addition also have some to scab and contain iron mineral, oxalate, magnesium mineral etc.These materials that scab must in time clean out, to keep the normal operation of production.Come pickling with dilute sulphuric acid or nitric acid exactly and remove one of these effective ways that scab, sulfuric acid or nitric acid are again dangerous chemical, thus this cover pickling system safe design just seem very important, direct relation the safety in production big problem.
Alumina producer needs to have following technical problem with the system that the pickling cleaning scabs at present:
1, high pressure dissolving-out cannula interchanger: that separates out scabs easily attached on the tube wall, causes the pipe heat-transfer coefficient to reduce, and influences heat transfer efficiency.Cause line clogging when serious, influence passing through of normal process flow, finally influence finishing of aluminum oxide output.
2, the tubulation of evaporation section vaporizer: at present the tubulation of tube-type down-flow evaporator reaches hundreds of even thousands of, and caliber Φ 57 * 4, its inwall scab needs regular pickling.Otherwise heat transfer coefficient reduces, and influences evaporation heat transfer efficient.
3, the plate-type heat exchanger of seminal fluid cooling workshop section: generations that scab of the runner of plate-type heat exchanger, needs regularly carry out alkali cleaning, pickling respectively.Scabbing mainly is to influence heat transfer coefficient, influences heat transfer efficiency, does not reach design objective.
Traditional pickle solution compound method is in container sulfuric acid to be mixed with water, does not add any inhibiter, and suitable situation is soaked the regular hour, and not circulation is put into circulating water system with acid after soaking.There is following shortcoming in this method: 1 pollutes recirculated water; 2 sulfuric acid consumptions are big; 3 pickling times are long; 4 equipment corrosions are serious; 5 safety assurances are relatively poor; 6 intermittent operation.
Summary of the invention
The present invention provides a kind of production system of pickle solution and production method in order to address the above problem, its objective is for timely scavenge system scabs, and guarantees to produce normal operation; In acid cleaning process, guarantee the safety of operator and equipment.
For reaching the production system of above-mentioned purpose pickle solution of the present invention, wherein concentrated sulfuric acid groove is communicated with dilute sulfuric acid tank, dilute sulfuric acid tank and diluted acid pump, lime latex dust, new water pipe, movable titanium pump with in be connected with pump.
1 of described concentrated sulfuric acid groove, dilute sulfuric acid tank are 2.
Described dilute sulfuric acid tank is connected with return line.
Described wherein 2 dilute sulfuric acid tanks are connected with sump pump.
Described concentrated sulfuric acid groove and compressed air pipe and vitriol oil supplied materials pipe coupling.
The production method of pickle solution, comprise the steps: to squeeze into Xin Shui to dilute sulfuric acid tank in advance from new water pipe, vitriol oil supplied materials is discharged into concentrated sulfuric acid groove by wagon tremie, open compressed air pipe the vitriol oil is pressed into the dilute sulfuric acid tank that band stirs, after water and the vitriol oil preparation, squeeze into inhibiter with movable titanium pump, in dilute sulfuric acid tank, the dilute sulphuric acid allotment is finished, squeeze into the workshop section of required pickling with the diluted acid pump.
Dilute sulphuric acid returns dilute sulfuric acid tank by return line after the described pickling, when dilute sulphuric acid can not use, milk of lime fed dilute sulfuric acid tank then by in and pump get to red mud dump.
The concentration of described water and vitriol oil preparation is 7-9%.
Described inhibiter is as if fourth, and consumption is the 0.5-1.5% of acid amount.
The production method of pickle solution comprises the steps: that also the dilute sulphuric acid of dilute sulfuric acid tank leakage is returned dilute sulfuric acid tank by sump pump.
Advantage of the present invention and effect are as follows:
Advantage of the present invention: spent acid does not efflux, environmentally safe; The sulfuric acid consumption is less; The pickling time is suitable; Lighter to equipment and corrosion of piping; Safety assurance is good; Can the continuous and automatic operation.
Effect of the present invention: the present invention is a kind of pickling safety design efficient ways, and in time scavenge system scabs, and guarantees to produce normal operation; In acid cleaning process, guarantee the safety of operator and equipment.
Description of drawings
Fig. 1 is the production system block diagram of pickle solution of the present invention.
Among the figure: A, concentrated sulfuric acid groove; B, dilute sulfuric acid tank; C, movable titanium pump; D, sump pump; E, diluted acid pump; F, in close pump; 1, vitriol oil supplied materials pipe; 2, compressed air pipe; 3, the vitriol oil; 4, return line; 5, new water pipe; 6, inhibiter pipe; 7, lime latex dust; 8, waste pipe; 9, diluted acid pipe; 10, close liquid in.
Embodiment
Below enforcement of the present invention is described in detail in conjunction with the accompanying drawings, but protection scope of the present invention is not limit by enforcement.The technology of the present invention is not only applicable to alumina producer, and it is applicable to that also other has the similar pipeline and the equipment of the character that scabs in the chemical metallurgy production field.
As shown in Figure 1, the production system of pickle solution of the present invention, be made of following structure: concentrated sulfuric acid groove A is communicated with dilute sulfuric acid tank B, dilute sulfuric acid tank B and diluted acid pump E, lime latex dust 7, new water pipe 5, movable titanium pump C, in be connected with pump F, dilute sulfuric acid tank B is 2, dilute sulfuric acid tank B is connected with return line 4, and wherein 2 dilute sulfuric acid tank B are connected with sump pump D, and concentrated sulfuric acid groove A is connected with vitriol oil supplied materials pipe 1 with compressed air pipe 2.
The production method of pickle solution of the present invention, comprise the steps: to squeeze into Xin Shui to dilute sulfuric acid tank B in advance from new water pipe 5, vitriol oil supplied materials is discharged into concentrated sulfuric acid groove A by wagon tremie, opening compressed air pipe 2 makes the pressurized air blowback that the vitriol oil 3 is pressed into the dilute sulfuric acid tank B that band stirs, after new water 5 and the vitriol oil 3 preparations, squeeze into inhibiter 6 with movable titanium pump C, the effect of inhibiter can slow down the corrosion of dilute sulphuric acid to cell body, the concentration of new water 5 and the vitriol oil 3 preparations is 7-9%, inhibiter is as if fourth, and consumption is the 0.5-1.5% of acid amount, in dilute sulfuric acid tank B the dilute sulphuric acid allotment is finished, E squeezes into the workshop section of required pickling with the diluted acid pump, and the general pickling time is about 6-8 hour; Dilute sulphuric acid returns dilute sulfuric acid tank B by return line 4 after the pickling, when dilute sulphuric acid can not use, open lime latex dust 7 and feed dilute sulfuric acid tank B and produce in the calcium sulfate and close liquid 10, then by in and pump F get to red mud dump; The dilute sulphuric acid that dilute sulfuric acid tank B leaks is returned dilute sulfuric acid tank B by sump pump 8.
Claims (11)
1. the production system of pickle solution is characterized in that concentrated sulfuric acid groove is communicated with dilute sulfuric acid tank, dilute sulfuric acid tank and diluted acid pump, lime latex dust, new water pipe, movable titanium pump with in be connected with pump.
2. the production system of pickle solution according to claim 1 is characterized in that described concentrated sulfuric acid groove is 1, and dilute sulfuric acid tank is 2.
3. the production system of pickle solution according to claim 1 and 2 is characterized in that described dilute sulfuric acid tank is connected with return line.
4. the production system of pickle solution according to claim 2 is characterized in that described 2 dilute sulfuric acid tanks are connected with sump pump.
5. the production system of pickle solution according to claim 1 is characterized in that described concentrated sulfuric acid groove and compressed air pipe and vitriol oil supplied materials pipe coupling.
6. the production method of pickle solution, it is characterized in that comprising the steps: squeezing into Xin Shui to dilute sulfuric acid tank in advance from new water pipe, vitriol oil supplied materials is discharged into concentrated sulfuric acid groove by wagon tremie, open compressed air pipe the vitriol oil is pressed into the dilute sulfuric acid tank that band stirs, after water and the vitriol oil preparation, squeeze into inhibiter with movable titanium pump, in dilute sulfuric acid tank, the dilute sulphuric acid allotment is finished, squeeze into the workshop section of required pickling with the diluted acid pump.
7. the production method of pickle solution according to claim 6, it is characterized in that described pickling after dilute sulphuric acid return dilute sulfuric acid tank by return line, when dilute sulphuric acid can not use, milk of lime fed dilute sulfuric acid tank then by in and pump get to red mud dump.
8. the production method of pickle solution according to claim 6 is characterized in that the concentration of the described water and vitriol oil preparation is 7-9%.
9. the production method of pickle solution according to claim 6 is characterized in that if described inhibiter is fourth.
10. according to the production method of claim 6 or 9 described pickle solutions, it is characterized in that the 0.5-1.5% of described inhibiter consumption for the acid amount.
11. the production method of pickle solution according to claim 6 is characterized in that also comprising the steps: that the dilute sulphuric acid that dilute sulfuric acid tank leaks returns dilute sulfuric acid tank by sump pump.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2008102294343A CN101748415B (en) | 2008-12-09 | 2008-12-09 | Pickler production system and pickler production method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2008102294343A CN101748415B (en) | 2008-12-09 | 2008-12-09 | Pickler production system and pickler production method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101748415A CN101748415A (en) | 2010-06-23 |
| CN101748415B true CN101748415B (en) | 2011-08-31 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2008102294343A Expired - Fee Related CN101748415B (en) | 2008-12-09 | 2008-12-09 | Pickler production system and pickler production method |
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| CN (1) | CN101748415B (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114210663A (en) * | 2021-11-19 | 2022-03-22 | 中铝中州铝业有限公司 | Method for cleaning bauxite leaching sleeve |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1256719A (en) * | 1998-03-11 | 2000-06-14 | 三菱重工业株式会社 | Pickling device |
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2008
- 2008-12-09 CN CN2008102294343A patent/CN101748415B/en not_active Expired - Fee Related
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1256719A (en) * | 1998-03-11 | 2000-06-14 | 三菱重工业株式会社 | Pickling device |
Non-Patent Citations (1)
| Title |
|---|
| JP昭59-6384A 1984.01.13 |
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| CN101748415A (en) | 2010-06-23 |
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Granted publication date: 20110831 Termination date: 20201209 |