CN102442690A - Method and device for producing light calcium carbonate by using boiler waste gas with 100% profit - Google Patents
Method and device for producing light calcium carbonate by using boiler waste gas with 100% profit Download PDFInfo
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- CN102442690A CN102442690A CN2011103239326A CN201110323932A CN102442690A CN 102442690 A CN102442690 A CN 102442690A CN 2011103239326 A CN2011103239326 A CN 2011103239326A CN 201110323932 A CN201110323932 A CN 201110323932A CN 102442690 A CN102442690 A CN 102442690A
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Abstract
The invention relates to a method and a device thereof, wherein the process for obtaining CO2 by indispensably burning calcium carbonate currently is cancelled; the nearly doubled production cost is saved; and the process for producing light calcium carbonate currently is replaced. The method comprises the following steps that: lime slurry enters a duplex overflow foam tower in advance and is discharged from the bottom of the tower; boiler waste gas enters through the bottom of the tower, the lime slurry of various layers of porous plates is blown to form liquid foam by raising waste gas, and CO2 in the waste gas is reacted with lime to generate the light calcium carbonate in the event of colliding the liquid foam; CO2 in the raising waste gas is reduced layer by layer, and, when the waste gas raises lime liquid foam layers which are previous two layers of the tower top, the CO2 is reacted with lime in a 100% manner, thus, no CO2 discharge resists on the tower top; and same, lime in downward flowing lime slurry is reduced layer by layer, lime is reacted with CO2 in a 100% manner at the foam layers which are previous two layers of the tower bottom, the liquid foam layers which are previous two layers of the tower bottom are fully filled with CO2, and the light calcium carbonate discharged at the tower bottom does not contain lime. The high-quality light calcium carbonate completely without dust, sulphur and lime can be produced by eliminating dust and SO2 in the boiler waste gas by using the duplex overflow foam tower and then recycling CO2.
Description
At present, Production of Light Calcium Carbonate is to use the lime carbonate calcine, and the carbonic acid gas that produces when absorbing burning lime carbonate with lime again obtains.At present, do not see the report of producing light calcium carbonate with boiler waste gas, to making the boiler waste gas contaminate environment.The profit profit that present technique proposes reaches method and the device thereof that 100% usefulness boiler waste gas is produced light calcium carbonate, is called for short present method and device thereof, can help to address the above problem.
The profit of making a profit reaches method and the device thereof that 100% usefulness boiler waste gas is produced light calcium carbonate, and its beneficial effect is: freely obtain carbonic acid gas, make at double to reduce production costs, and subduction boiler waste gas contaminate environment.
The profit of making a profit reaches method and the device thereof that 100% usefulness boiler waste gas is produced light calcium carbonate, and the technical scheme that its technical solution problem is adopted is, but with behind the boiler waste gas dust-removing sulphur removing function, absorbs boiler waste gas with lime slurry and obtain light calcium carbonate; After it can send into compound overflow foam column (3) dedusting that dedusting agent is housed with boiler waste gas (1) with blower fan (2); After with blower fan (4) dust-removing waste gas can being sent into compound overflow foam column (5) sulphur removal that sulfur elimination is housed again; But then with the boiler waste gas of dust-removing sulphur removing function; Send into acquisition light calcium carbonate in the compound overflow foam column (7) that lime slurry is housed with blower fan (6), thereby the method that makes the profit of making a profit reach 100% usefulness boiler waste gas production light calcium carbonate is able to normal operation.Like Fig. 1
The existing operation of introducing with boiler waste gas production light calcium carbonate method.
Boiler waste gas contains a large amount of carbonic acid gas.Utilize it can need not to take the technology of burning lime carbonate acquisition carbonic acid gas, thereby save nearly production cost doubly.Because of it saves the carbonic acid gas that accounts for weight 44%, only need just can obtain to account for the light calcium carbonate of weight 100% with the quicklime that accounts for weight 56%.
Produce light calcium carbonate, can be with the boiler waste gas dust-removing sulphur removing function; In order to produce the fine light calcium carbonate, should make the carbonic acid gas and the lime slurry reaction of dustless no sulphur again with behind the boiler waste gas dust-removing sulphur removing function, so just can obtain free from dust not sulfur-bearing do not have the high-quality light calcium carbonate of lime.
Below be described further through embodiment.
Compound overflow foam column is the device of carrying out with boiler waste gas production high-quality light calcium carbonate method.
Compound overflow foam column, its beneficial effect is: can be with dust, carbonic acid gas can 100% be reclaimed in the sulfurous gas full scale clearance, less than 5% carbonic acid gas, also can produce the high-quality light calcium carbonate that dustless no sulphur does not have lime with concentration content.
Compound overflow foam column, the technical scheme that its technical solution problem is adopted are by transparent tube (8), to be uniformly distributed with the porous plate (9) of aperture, upflow tube (10), turnover gas-liquid pipe (11) composition; Its installation is, sealing transparent tube one end is with the polylith porous plate segment distance of being separated by; Be installed in the transparent tube; Upflow tube passes porous plate, and upflow tube upper end is near last block porous plate, and the upflow tube lower end is near piece porous plate down; The sealing transparent tube the other end is installed into out gas-liquid pipe at sealing transparent tube upper and lower ends; Make compound overflow foam column (12) be able to normal operation.Like Fig. 1
Compound overflow foam column operation is introduced:
Dioxide gas gets at the bottom of tower, discharges from cat head; Lime slurry gets into from cat head, at the bottom of tower, discharges.Lime slurry is passed the dioxide gas of porous plate and is blown out vacuole; When the lime slurry alveolar layer exceeded upflow tube, the lime white vacuole became lime slurry and stays on this porous plate from the porous plate of overflow mouth of pipe inflow lower floor; Passed the carbonic acid gas of this porous plate again and blown out the lime slurry alveolar layer; The lime white vacuole flows into the porous plate of a lower floor again from the overflow mouth of pipe, from again repeatedly, until being gone out by tower bottom flow.Control lime slurry flow makes a small amount of vacuole flow into the porous plate of one deck down from the overflow mouth of pipe; The pilot-gas flow makes the two-layer vacuole layer of cat head keep the former entering concentration of lime slurry, so; Near the cat head three first layers, carbonic acid gas with the lime slurry complete reaction, carbonic acid gas is all reclaimed; Cat head does not just have carbonic acid gas to discharge; In addition, make that the carbonic acid gas of two-layer vacuole layer keeps former entering concentration at the bottom of the tower, will discharge not limy liquid at the bottom of the tower.Carbonic acid gas and lime slurry reaction generate light calcium carbonate, so its concentration of the every rising layer of carbonic acid gas just reduces, carbonic acid gas rises through multilayer, and concentration constantly reduces, and is raised to the cat head three first layers, and carbonic acid gas does not have.
Every cubic metre can produce 1,000,000 to 8,000,000 foams dioxide gas is wrapped up in the compound overflow foam column, and makes dioxide gas in vacuole, roll.In the compound overflow foam column up to a hundred blocks of porous plates can be arranged, hold tens cubic metres of lime slurry foams; Upflow tube makes every layer of foamy most foams go the rounds tens times at this layer foam layer, makes tens bumps of lime slurry carbonic acid gas of every layer; In compound overflow foam column, carbonic acid gas bump lime slurry several thousand times carries out slap-up reaction, and the carbonic acid gas ability 100% that guarantees to get in the compound overflow foam column is recovered.
Produce light calcium carbonate at present, require gas concentration lwevel to be no less than 30%; The meliority of compound overflow foam column is that it also can produce not limy light calcium carbonate with the gas concentration lwevel that is less than 5%.
The Figure of description explanation:
1. boiler waste gas, 2. blower fan, 3. compound overflow foam column, 4. blower fan; Carbonated 5. formula overflow foam columns not, 6. blower fan, 7. compound overflow foam column, 8. transparent tube; 9. be uniformly distributed with the porous plate of aperture, 10. upflow tube, 11. turnover gas-liquid pipes, 12. compound overflow foam columns.
Claims (2)
1. the profit of making a profit reaches method and the device thereof that 100% usefulness boiler waste gas is produced light calcium carbonate, it is characterized in that, but with behind the boiler waste gas dust-removing sulphur removing function, absorbs boiler waste gas with lime slurry and obtain light calcium carbonate; After it can send into the compound overflow foam column dedusting that dedusting agent is housed with boiler waste gas with blower fan; After with blower fan dust-removing waste gas can being sent into the compound overflow foam column sulphur removal that sulfur elimination is housed again; But then with the boiler waste gas of dust-removing sulphur removing function; Send in the compound overflow foam column that lime slurry is housed with blower fan and to obtain light calcium carbonate, produce the method for light calcium carbonate and be able to normal operation thereby make the profit of making a profit reach 100% usefulness boiler waste gas.
2. compound overflow foam column according to claim 1 is characterized in that, by transparent tube, is uniformly distributed with the porous plate of aperture, upflow tube, and the turnover gas-liquid pipe is formed; Its installation is, sealing transparent tube one end is with the polylith porous plate segment distance of being separated by; Be installed in the transparent tube; Upflow tube passes porous plate, and upflow tube upper end is near last block porous plate, and the upflow tube lower end is near piece porous plate down; The sealing transparent tube the other end is installed into out gas-liquid pipe at sealing transparent tube upper and lower ends; Make compound overflow foam column be able to normal operation.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011103239326A CN102442690A (en) | 2006-10-30 | 2006-10-30 | Method and device for producing light calcium carbonate by using boiler waste gas with 100% profit |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011103239326A CN102442690A (en) | 2006-10-30 | 2006-10-30 | Method and device for producing light calcium carbonate by using boiler waste gas with 100% profit |
Related Parent Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNA2006101460510A Division CN101173764A (en) | 2006-10-30 | 2006-10-30 | Boiler without generating acid rain by dedusting in stove and device for producing protein by boiler waste gas |
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| CN102442690A true CN102442690A (en) | 2012-05-09 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103449494A (en) * | 2013-08-27 | 2013-12-18 | 上海东升新材料有限公司 | Method for producing light calcium carbonate by using boiler flue gas |
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- 2006-10-30 CN CN2011103239326A patent/CN102442690A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103449494A (en) * | 2013-08-27 | 2013-12-18 | 上海东升新材料有限公司 | Method for producing light calcium carbonate by using boiler flue gas |
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Application publication date: 20120509 |