CN1092269C - Method for glass production by using black liquid - Google Patents
Method for glass production by using black liquid Download PDFInfo
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- CN1092269C CN1092269C CN97107782A CN97107782A CN1092269C CN 1092269 C CN1092269 C CN 1092269C CN 97107782 A CN97107782 A CN 97107782A CN 97107782 A CN97107782 A CN 97107782A CN 1092269 C CN1092269 C CN 1092269C
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- glass
- black liquor
- black liquid
- glass production
- black
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Abstract
The present invention relates to a method for producing glass by papermaking black liquor, which comprises the steps of black liquor extraction, evaporation, compounding ingredient pretreatment, spray drying, combustion, melting, etc. Sodium salt in the papermaking black liquor is used for replacing calcined soda in the glass production. The alkali replacement rate can reach 80% to 100%, and the melting time of the existing glass production is shortened by one third. The method has the advantages of production efficiency increase, technical process simplification, energy consumption reduction, cost reduction and environmental pollution treatment.
Description
The invention belongs to a kind of technical field of making glass with black liquid.
Paper-making industrial waste water is that China's water pollutes the most outstanding pollution sources, the waste water of paper mill discharge capacity accounts for 1/6 of national discharged volume of industrial waste water, organic pollution (in BODs), account for 1/3 of national industrial wastewater pollution total amount, wherein the pollution that causes of black liquor of pulp making is the most serious, its pollutional load accounts for more than 80% of paper waste pollution, grass fiber factory particularly, it is big that straw pulp alkali reclaims black liquor viscosity, the silicone content height, shortcoming such as fuel value is low, thereby alkali reclaim in evaporator section particularly high dense, the evaporator section fouling is serious, evaporation efficiency reduces, burning zone burning difficulty needs a large amount of auxiliary fuels, as it is big to continue to use the alkali recovery process difficulty of wood pulp, the expense height, difficult normal operation, and have the irretrievable problem of white clay, and quartz sand is arranged usually with the main raw material of glass, calcite, dolomite, soda ash etc., wherein the alkali charge of soda ash is big, usually at 14-18% (Na
2O counts), and in the frit cost, occupy the about 60-70% of larger specific gravity.
The objective of the invention is to be deficiency at above-mentioned existence, black liquid is seriously polluted, the alkali recovery process difficulty of straw pulp black liquor is big, expense height, operation difficulty, and the alkali charge that the glass manufacturing needs is big, provide a kind of technological process simple, construction investment is few, and operating cost is low, effectively solve straw pulp black liquor and pollute, pollution treatment black liquid completely is used for the method for glass production.
Technical scheme of the present invention is as follows:
The technological process that black liquid is used for glass production is: extract workshop section's black liquor → evaporation → batch preliminary treatment → spray drying → combustion furnace → glass and give batch → glass finished product.Concrete process sequence is: at first extract workshop section's black liquor, through evaporation and concentration, carry out the batch preliminary treatment with the frit mixed grinding, spray-dried again, deliver to the combustion furnace burning, organic matter in the black liquor is removed in combustion, furnace temperature gets final product with the after-flame organic matter, forms glass and prepares burden in advance, finally makes the glass finished product.When the ignition temperature of above-mentioned combustion furnace was 800-1200 ℃, the glass that can obtain preparing solid glass was prepared burden in advance.When the ignition temperature of above-mentioned combustion furnace was 1200-1600 ℃, the glass that can obtain preparing waterglass was prepared burden in advance.This invention is to replace soda ash in the glass production with the sodium salt in the black liquid, and the effect of soda ash is to introduce sodium oxide molybdena in glass, to reduce glass viscosity, makes glass be easy to found; Organic component in the black liquid produces heat in combustion process, concentrate for black liquor, and inorganic matters such as sodium in the black liquor and silica enter frit, become the glass effective ingredient.
Advantage of the present invention is as follows:
1. the alkali replacement rate of Fa Ming straw pulp black liquor can reach 80-100%.
2. this invention is compared with traditional alkali recovery process, the black liquid organic compound combustion produces heat, reclaims heat energy, and inorganic matter composition sodium salt, silica etc. enter in the glass composition in the black liquor, become the glass effective ingredient, it is thorough that this technology does not have white clay secondary pollution, pollution treatment that traditional straw pulp alkali reclaims.
3. traditional relatively straw pulp alkali recovery process, black liquid is used for glass production and has avoided the silicon interference to a great extent, and black liquor viscosity is big, and fuel value is low to wait a crucial difficult problem in the alkali recovery, and technical process is simple, helps making factory to reduce cost, and increases economic efficiency.
4. the present invention and traditional alkali reclaim, and glass gives preparation of batch and simplified evaporation, furnace room largely, no causticization, and the white clay recycle section, although increased the grinding step of pre-batching, the construction investment amount will reduce significantly.
5. this invention is compared with process of glass, burden processes such as glass factory's raw material crushing, screening have been simplified, shortened 1/3 of existing glass production melting time, improved output, cut down the consumption of energy, because the large percentage that glass factory's fusion cast glass energy consumption accounts in cost structure, thereby use this technology can reduce glass factory's production cost, obtain better economic benefit.
The present invention will be further described below in conjunction with process chart and embodiment:
The process of glass flow chart.
Frit
↓
Extract workshop section's black liquor → evaporation → batch preliminary treatment → spray drying → combustion furnace → glass its pre-mated material → glass finished product.
Embodiments of the invention 1:
At first extract workshop section's black liquor through evaporation and concentration to 20Be ' and frit mixed grinding, spray-dried to combustion furnace, organic matter in the black liquor is removed in combustion, furnace temperature gets final product with the after-flame organic matter, forms finally that canescence glass is prepared burden in advance, powder.This invented technology flow process is as preparing burden by the solid glass factory formula, the burning furnace temperature be 800 ℃ with interior after-flame organic matter, can obtain containing alkali solid glass its pre-mated material, send glass-melting furnace to make solid glass, combustion furnace also can be connected with glass-melting furnace directly produces solid glass.As furnace temperature being brought up to 1200 ℃, can obtain the sodium metasilicate fused mass, after melting pot dilution dissolving, can obtain the waterglass of liquid.The black liquid that the present invention says mainly is a straw pulp black liquor, but also comprises pulp black liquor and other non-pulp black liquor etc.
Embodiment 2: its technical process is identical with embodiment 1, wherein extract workshop section's black liquor through evaporation and concentration to 23Be ', when the burning furnace temperature of glass its pre-mated material manufacturing is 1000 ℃, solid glass its pre-mated material, when the burning furnace temperature is 1400 ℃, get waterglass its pre-mated material.
Embodiment 3: its technical process is identical with embodiment 1, wherein extract workshop section's black liquor through evaporation and concentration to 25Be ', when the burning furnace temperature of glass its pre-mated material manufacturing is 1200 ℃, solid glass its pre-mated material, when the burning furnace temperature is 1600 ℃, get waterglass its pre-mated material.
Claims (3)
1. black liquid is used for the method for glass production, it is characterized in that this method is in proper order: at first extract workshop section's black liquor, through evaporation and concentration, carry out the batch preliminary treatment with the frit mixed grinding, spray-dried to combustion furnace, organic matter in the black liquor is removed in combustion, and furnace temperature gets final product with the after-flame organic matter, form glass and prepare burden in advance, finally make the glass finished product.
2. black liquid according to claim 1 is used for the method for glass production, it is characterized in that when the ignition temperature of above-mentioned combustion furnace is 800-1200 ℃, and the glass that can obtain preparing solid glass is prepared burden in advance.
3. black liquid according to claim 1 is used for the method for glass production, it is characterized in that when the ignition temperature of above-mentioned combustion furnace is 1200-1600 ℃, and the glass that can obtain preparing waterglass is prepared burden in advance.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN97107782A CN1092269C (en) | 1997-11-13 | 1997-11-13 | Method for glass production by using black liquid |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN97107782A CN1092269C (en) | 1997-11-13 | 1997-11-13 | Method for glass production by using black liquid |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1218125A CN1218125A (en) | 1999-06-02 |
| CN1092269C true CN1092269C (en) | 2002-10-09 |
Family
ID=5169870
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN97107782A Expired - Fee Related CN1092269C (en) | 1997-11-13 | 1997-11-13 | Method for glass production by using black liquid |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1092269C (en) |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN87211205U (en) * | 1987-09-18 | 1988-11-02 | 上海纸浆厂 | Alkali recovery furnace with evaporating and burning sysem |
| CN1034188A (en) * | 1988-12-21 | 1989-07-26 | 江苏省日用化工研究所 | Black liquid alkali reclaims the method for utilizing of waste residue white clay |
| CN1040568A (en) * | 1988-08-19 | 1990-03-21 | Ppg工业公司 | Method with making glass with preliminary reaction of batch materials |
-
1997
- 1997-11-13 CN CN97107782A patent/CN1092269C/en not_active Expired - Fee Related
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN87211205U (en) * | 1987-09-18 | 1988-11-02 | 上海纸浆厂 | Alkali recovery furnace with evaporating and burning sysem |
| CN1040568A (en) * | 1988-08-19 | 1990-03-21 | Ppg工业公司 | Method with making glass with preliminary reaction of batch materials |
| CN1034188A (en) * | 1988-12-21 | 1989-07-26 | 江苏省日用化工研究所 | Black liquid alkali reclaims the method for utilizing of waste residue white clay |
Also Published As
| Publication number | Publication date |
|---|---|
| CN1218125A (en) | 1999-06-02 |
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| C53 | Correction of patent for invention or patent application | ||
| CB03 | Change of inventor or designer information |
Inventor after: Sun Jun Inventor after: Yang Dawei Inventor after: Deng Jialin Inventor before: Sun Jun Inventor before: Deng Jialin |
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| COR | Change of bibliographic data |
Free format text: CORRECT: INVENTOR; FROM: SUN JUN; DENG JIALIN TO: SUN JUN; YANG DAWEI; DENG JIALIN |
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| C14 | Grant of patent or utility model | ||
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| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |