JPS64194A - Method of adjusting ph value in production of coal-water slurry - Google Patents
Method of adjusting ph value in production of coal-water slurryInfo
- Publication number
- JPS64194A JPS64194A JP15427587A JP15427587A JPS64194A JP S64194 A JPS64194 A JP S64194A JP 15427587 A JP15427587 A JP 15427587A JP 15427587 A JP15427587 A JP 15427587A JP S64194 A JPS64194 A JP S64194A
- Authority
- JP
- Japan
- Prior art keywords
- adjusting
- concn
- slurry
- value
- adjustor
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Landscapes
- Liquid Carbonaceous Fuels (AREA)
Abstract
PURPOSE: To provide a method which can remarkably improve the accuracy of pH adjustment without bringing about rapid lowering in the pH value, enables prevention of corrosion of equipment constituting a low-concn. system, and can improve the quality of the title slurry, by adjusting the pH at two places, i.e., low and high concn. systems.
CONSTITUTION: A method of adjusting the pH in the production of a coal-water slurry, wherein the pH value in adjusted in a low-concn. system, from an acid region, i.e., pH 4W6, to pH 7, i.e., a pH outside the range which brings about corrosion. The pH adjustment is conducted by detecting the pH value of the slurry with an on-line pH meter 20 provided in a slurry tank within a vacuum dehydrator 8 and feeding a pH adjustor to a wet tube mill 3 while adjusting the feed of the pH adjustor with a pH adjustor pump 17'. On the other hand, in a high-concn. system, the pH value is adjusted from pH 7 to pH 8W9. The pH adjustment is conducted by detecting the pH value of a high-concn. slurry discharged from a first slurry adjusting tank 10 with an on-line pH meter 19, adjusting the feed of the pH adjustor with a pH adjusting pump 17, and feeding the pH adjustor to a first slurry adjusting tank 10. In this method, corrosion can be prevented in the equipment constituting the high-concn. system as well as in the equipment constituting the low-concn. system. Further, the accuracy of the pH adjustment can be remarkably improved.
COPYRIGHT: (C)1989,JPO&Japio
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP62-154275A JPH01194A (en) | 1987-06-23 | pH adjustment method in coal-water slurry production |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP62-154275A JPH01194A (en) | 1987-06-23 | pH adjustment method in coal-water slurry production |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS64194A true JPS64194A (en) | 1989-01-05 |
| JPH01194A JPH01194A (en) | 1989-01-05 |
Family
ID=
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4796693A (en) * | 1985-10-31 | 1989-01-10 | Wieland-Werke Ag | Finned tube with indented groove base and method of forming same |
| JP2007333607A (en) * | 2006-06-16 | 2007-12-27 | Kyushu Sankosha:Kk | Airtightness inspection device whose inspection object is box for attaching steam movement control device |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4796693A (en) * | 1985-10-31 | 1989-01-10 | Wieland-Werke Ag | Finned tube with indented groove base and method of forming same |
| JP2007333607A (en) * | 2006-06-16 | 2007-12-27 | Kyushu Sankosha:Kk | Airtightness inspection device whose inspection object is box for attaching steam movement control device |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| JPS57109512A (en) | Rolling method | |
| JPS64194A (en) | Method of adjusting ph value in production of coal-water slurry | |
| JPS53113161A (en) | Dewatering method for sludge | |
| Reddy | Paper mills effluent for sugarcane irrigation. | |
| HUT34199A (en) | Process for the production of 1,2,3-triazino/4'5':4,5/ thieno/2,3-b/quinoline-4-/3h/-on-derivatives | |
| JPS5687634A (en) | Controlling method for metallic element separating operation | |
| JPS56158732A (en) | Preparation of alpha-halogeno-beta-phenylpropionic acid | |
| JPS5549196A (en) | Control method for excess sludge extraction | |
| JPS57205326A (en) | Purifying method for aqueous nickel chloride solution | |
| JPS57184500A (en) | Dehydrator for sludge | |
| JPS52149271A (en) | Production of purified water | |
| JPS57114691A (en) | Method and device for plating | |
| JPS52122574A (en) | Method and apparatus for producing herbivorous solid fodder | |
| JPS57110400A (en) | Chemical injection controller | |
| JPS57206678A (en) | Stereoisomerization of acid anhydride | |
| JPS5393412A (en) | Intermittent automatic water feed device | |
| JPS5354369A (en) | Method for removing slurry part | |
| JPS57197243A (en) | Preparation of aromatic carboxylic acid | |
| JPS57184487A (en) | Control method for condensed water-filtering desalinator group | |
| Teraoka | Amounts of Suspended Solids and Elements Transported Annually from the Takahashi River(Japan) to Estuary(in Japanese) | |
| JPS53108867A (en) | Controlling method for rolling mill | |
| Chernyi | Surface Quality in Machining Large-Scale Threads by Adjustable(Thread-Cutting) Heads | |
| JPS5687678A (en) | Electric corrosion preventing method of pipe inside wall | |
| McEnroe et al. | Effects of ozonation and direct filtration on the bacterial growth potential of drinking water | |
| JPS55145509A (en) | Flocculating method for suspension |