CN201284237Y - Apparatus for producing white carbon black from high-alumina fly ash - Google Patents
Apparatus for producing white carbon black from high-alumina fly ash Download PDFInfo
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- CN201284237Y CN201284237Y CNU2008201080268U CN200820108026U CN201284237Y CN 201284237 Y CN201284237 Y CN 201284237Y CN U2008201080268 U CNU2008201080268 U CN U2008201080268U CN 200820108026 U CN200820108026 U CN 200820108026U CN 201284237 Y CN201284237 Y CN 201284237Y
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- desiliconization
- double pipe
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Abstract
The utility model discloses a device of for producing silica by using high aluminum pulverized coal ash, which relates to the technical field of material and chemical engineering. The device comprises a pulverized coal ash slurry blending system, a pulverized coal ash pre-desiliconization system, a silica preparation system and a caustification system. The structure of the device is characterized in that a double pipe heater is divided into two sections. An outlet pipeline arranged on the lower part of an insulation retaining tank is divided into two channels. The solution outlet of a tubular shape falling film evaporator is connected with one inlet of a circulating mother solution preparation tank through an circulating motherevaporating solution pump,; one of the other two inlets of the circulating mother solution preparation tank is an alkali supplement pipeline, and the other inlet is connected with a caustification tank through a caustification liquid pump. The outlet pipeline of the circulating mother solution preparation tank is connected with the inlet of the pulverized coal ash slurry preparation tank through a circulating mother solution pump. so that the entire system form a closed cycle. The utility model has the advantages of simple process, low production cost and energy consumption, and stable product quality and performance; meanwhile, the pulverized coal ash after being extracted silica also can be used for preparing alumina as an important aluminum resource.
Description
Technical field
The utility model relates to material, chemical technology field, particularly utilizes aluminous fly-ash to produce the device of white carbon black.
Background technology
White carbon black, i.e. hydrated SiO 2, a kind of white powder amorphous hydrated silica, its chemical formula is mSiO
2NH
2O is the present best white with excellent reinforcing property, transparent reinforcing filler.As a kind of important fine inorganic Chemicals, extensive use is arranged in every field such as rubber, plastics, agricultural chemicals, paint, pharmacy, papermaking, household chemicalss.
Processing method about the fly-ash Preparation white carbon black in the prior art document has acid system and alkaline process, and acid system is to remove aluminium with the molten flyash of hydrochloric acid earlier, and residue prepares water glass with the alkali pyrolysis then, adds hydrochloric acid again and produces white carbon black.Its shortcoming is: processing step is many, the difficult control of reaction process condition, and also hydrochloric acid easily pollutes environment.Alkaline process is earlier flyash to be added alkali high-temperature roasting, acidleach filtration, obtains containing H
2SiO
3Filtrate, add the NaCl precipitating again and produce white carbon black.Its shortcoming is: process complexity, condition control require high, and energy consumption is big.Chinese patent of the prior art, application number is that 93111642.2 patent of invention " utilizes coal ash to produce the method for carbon black and white carbon black ", disclosed technical scheme is, earlier flyash is carried out repeatedly flotation, the silicon ash that obtains obtains white carbon black through dehydration, drying, classification, levigate, homogenizing processing again.This method production stage is many, more loaded down with trivial details, and the white carbon black performance that obtains can't guarantee.In addition, application number is 200610012780.7 utility model patent " method of extraction aluminum oxide while co-producing white carbon black in the flyash ", disclosed technical scheme is the residue that utilizes after activation back flyash and sulfate of ammoniac reaction are filtered, water glass is produced in the reaction of repeated hydrogenation sodium hydroxide solution, add sulfuric acid then and prepare white carbon black, this method complex process adopts acid system to prepare white carbon black, the condition of reaction process must strictly be controlled, otherwise can cause the performance difference of product bigger.
Summary of the invention
At the shortcoming that exists in the above-mentioned prior art, the purpose of this utility model provides a kind of device that utilizes aluminous fly-ash to produce white carbon black.Not only technology is simple, production cost is low for it, energy consumption is low, and the quality product stable performance, and the flyash that extracts simultaneously behind the white carbon black can also be used to prepare aluminum oxide as a kind of important bauxite resource.
In order to realize the foregoing invention purpose, the technical solution of the utility model realizes as follows:
A kind of device that utilizes aluminous fly-ash to produce method for white carbon black, it comprises by flyash storehouse, constant feeder, pulverized fuel ash slurry preparation vessel, desiliconization feeds the pulverized fuel ash slurry mixing system that liquid pump, circulating mother liquor preparation vessel and circulating mother liquor pump are formed; The pre-desiliconization of the flyash system that forms by double pipe heater, insulation remaining tank, desiliconization recycle pump, desiliconization slurry tank, filter feeding pump, square position formula filter, desiliconization ash filter cake groove and desiliconization ash filter cake pump; The Preparation of White Carbon Black system that forms by carbonization groove, pressure filter feeding pump, plate and frame(type)filter press, white carbon black filter cake groove, white carbon black filter cake pump and drying machine; And the causticization system that forms by liming vat, milk of lime pump, causticizing tank, causticization liquid pump, tube-type down-flow evaporator and evaporating solns pump.Its constructional feature is that described double pipe heater is divided into two sections, is double pipe heater one and double pipe heater two.Pulverized fuel ash slurry preparation vessel bottom pipe is fed the liquid pump outlet by desiliconization and is connected with the interior tube inlet of double pipe heater one and double pipe heater two respectively, the interior pipe outlet of double pipe heater one links to each other with the interior tube inlet of double pipe heater two, and the interior pipe outlet of double pipe heater two is connected with the import at insulation remaining tank top.The outlet conduit of insulation remaining tank bottom divides two-way, one the road is connected to the inlet of desiliconization slurry tank, another road is connected to the outer tube inlet of double pipe heater one by the desiliconization recycle pump, the outer tube outlet of double pipe heater one is connected to the inlet of desiliconization slurry tank, and the outer tube of double pipe heater two is connected with steam-pipe.The taphole of tube-type down-flow evaporator is connected to one road inlet of circulating mother liquor preparation vessel by the evaporating solns pump, it one the tunnel is that alkali replenishes pipeline that the in addition two-way of circulating mother liquor preparation vessel enters the mouth, another road links to each other with the outlet of causticizing tank through the causticization liquid pump, the outlet conduit of circulating mother liquor preparation vessel is connected to the inlet of pulverized fuel ash slurry preparation vessel through the circulating mother liquor pump, makes total system form closed cycle.
In said apparatus, establish the electrically heated tube bank in the described insulation remaining tank, keep temperature-resistant in the jar.
In said apparatus, the evaporative condenser hot water that described tube-type down-flow evaporator produces is connected respectively to the inlet of desiliconization ash filter cake groove, white carbon black filter cake groove and liming vat.
The utility model compared with the prior art, advantage is:
(1) the raw material aluminous fly-ash is the product after the high-temperature fusion in coal-powder boiler, and it is amorphous carbon/silicon dioxide that coal CLAY MINERALS AND THEIR SIGNIFICANCE high-temperature fusion quick cooling produces a large amount of vitreums, and reactive behavior is better than through the powdery particles after the natural silica pulverizing;
(2) adopt aluminous fly-ash to make raw material, be finely powdered, need not fragmentation, reduce broken process;
(3) adopt CO
2Gas carbonization sodium silicate solution, technology is simple, and is easy to operate, and can utilize the kiln gas of other process section, and production cost is low;
(4) the white carbon black product performance of carbonization preparation are stable, and specific surface area is big, and the DBP value is high;
(5) raw materials used sodium hydroxide can be recycled, and reduces the production cost of white carbon black greatly;
(6) liquid-solid separation wash water adopts evaporator condensation water, has realized recycling of water, saves production cost;
(7) the flyash alumina silica ratio of alkali after molten improves greatly, can be used as the production alumina raw material, realizes the changing waste into resources utilization.The higher bauxite of China's alumina silica ratio lacks simultaneously, and this kind aluminum-containing raw material can effectively be alleviated the present situation that China's bauxite lacks, and to developing China's recycling economy and alleviating China's bauxite resource shortage, has strategic importance.
Below in conjunction with the drawings and specific embodiments the utility model is described further.
Description of drawings
Fig. 1 is the structure principle chart of the utility model device;
Fig. 2 is for using the technological process of production figure of the utility model device.
Embodiment
Referring to Fig. 1, the utility model device comprises by flyash storehouse 1, constant feeder 2, pulverized fuel ash slurry preparation vessel 3, desiliconization feeds the pulverized fuel ash slurry mixing system that liquid pump 4, circulating mother liquor preparation vessel 25 and circulating mother liquor pump 26 are formed; The pre-desiliconization of the flyash system that forms by double pipe heater 5, insulation remaining tank 6, desiliconization recycle pump 7, desiliconization slurry tank 8, filter feeding pump 9, square position formula filter 10, desiliconization ash filter cake groove 11 and desiliconization ash filter cake pump 12; The Preparation of White Carbon Black system that forms by carbonization groove 13, pressure filter feeding pump 14, plate and frame(type)filter press 15, white carbon black filter cake groove 16, white carbon black filter cake pump 17 and drying machine 18; And the causticization system that forms by liming vat 21, milk of lime pump 22, causticizing tank 19, causticization liquid pump 20, tube-type down-flow evaporator 23 and evaporating solns pump 24.Double pipe heater 5 is divided into two sections, and for double pipe heater one 5-1 is a pulp pre-heating, double pipe heater two 5-2 are steam heating.Pulverized fuel ash slurry preparation vessel 3 bottom pipe are fed liquid pump 4 outlets by desiliconization and are connected with the interior tube inlet of double pipe heater two 5-2 with double pipe heater one 5-1 respectively, the interior pipe outlet of double pipe heater one 5-1 links to each other with the interior tube inlet of double pipe heater two 5-2, and the interior pipe outlet of double pipe heater two 5-2 is connected with the import at insulation remaining tank 6 tops.The outlet conduit of insulation remaining tank 6 bottoms divides two-way, and one the road is connected to the inlet of desiliconization slurry tank 8, and another road is connected to the outer tube inlet of double pipe heater one 5-1 by desiliconization recycle pump 7.The outer tube outlet of double pipe heater one 5-1 is connected to the inlet of desiliconization slurry tank 8, and the outer tube of double pipe heater two 5-2 is connected with steam-pipe.The taphole of tube-type down-flow evaporator 23 is connected to one road inlet of circulating mother liquor preparation vessel 25 by evaporating solns pump 24, it one the tunnel is that alkali replenishes pipeline that the in addition two-way of circulating mother liquor preparation vessel 25 enters the mouth, and another road links to each other through the outlet of causticization liquid pump 20 with causticizing tank 19.The outlet conduit of circulating mother liquor preparation vessel 25 is connected to the inlet of pulverized fuel ash slurry preparation vessel 3 through circulating mother liquor pump 26, and total system forms closed cycle.Establish the electrically heated tube bank in the insulation remaining tank 6, keep temperature-resistant in the jar.The evaporative condenser hot water that tube-type down-flow evaporator 23 produces is connected respectively to the inlet of desiliconization ash filter cake groove 11, white carbon black filter cake groove 16 and liming vat 21.
Referring to Fig. 2, utilize the step of aluminous fly-ash production white carbon black as follows:
(1) aluminous fly-ash is metered into pulverized fuel ash slurry preparation vessel 3 from flyash storehouse 1 through constant feeder 2, and with the circulating mother liquor of circulating mother liquor preparation vessel 25, promptly sodium hydroxide solution carries out alkali solution-off pasc reaction according to the proportioning mixing.Feed liquid pump 4 by desiliconization then and be delivered to double pipe heater 5.The aluminous fly-ash that adopts is Al wherein
2O
3Content is 48.5%, SiO
2Content is 37.8%, and concentration of sodium hydroxide solution is 20%, and the mass ratio of sodium hydroxide and flyash is 0.5:1.
(2) pulverized fuel ash slurry divides two-way to enter the interior pipe of double pipe heater one 5-1 and double pipe heater two 5-2, come out to enter the interior pipe of double pipe heater two 5-2 after the slurries heating in double pipe heater one 5-1 in the pipe, slurries in double pipe heater two 5-2 in the pipe are heated to 120 ℃ and are sent in the insulation remaining tank 6 and carry out pre-desilication reaction, temperature maintenance is at 120 ℃ in jar, react desiliconization slurries parts that are incubated in the remaining tank 6 after 2.0 hours and heat by the slurries that desiliconization recycle pump 7 turns back to the internal pipe of double pipe heater one 5-1 outer tube, the slurries of heating rear sleeve well heater one 5-1 outer tube and insulation remaining tank 6 interior another part desiliconization slurries are sent into desiliconization slurry tank 8 and are prepared to carry out solid-liquid separation and carrying out washing treatment.The slurries that the outer tube of double pipe heater two 5-2 inserts the internal pipe of live steam heat.Pulverized fuel ash slurry after the desiliconization is delivered to square position formula filter 10 with filter feeding pump 9 from desiliconization slurry tank 8, under 85 ± 10 ℃, carry out filtering separation and washing, powdered coal cinder after the separation enters desiliconization ash filter cake groove 11, mix with hot water then, being back to square position formula filter 10 by desiliconization ash filter cake pump 12 again filters, desiliconization flyash after the filtration stores the raw material as alumina producing, and washing lotion and desiliconization solution are delivered to carbon and divided groove 13.
(3) after the mixed solution of washing lotion and desiliconization solution is delivered to carbon and divides groove 13, feed CO down at 85 ℃
2Carry out carburizing reagent, separate out precipitation SiO
2, when the pH value of slip system is reduced to 10, stop ventilation, will precipitate SiO then
2Be sent to plate and frame(type)filter press 15 with the mixing solutions of yellow soda ash by pressure filter feeding pump 14.
(4) carbon in the plate and frame(type)filter press 15 divides mixed solution to carry out filtering separation and washing under 85 ℃, white carbon black after the separation enters white carbon black filter cake groove 16, mix with hot water then, being back to plate and frame(type)filter press 15 by white carbon black filter cake pump 17 again filters, white carbon black after the filtration is delivered to drying machine, 120 ℃ of oven dry down, make the white carbon black finished product, washing lotion and sodium carbonate solution are delivered to causticizing tank 19.
(5) milk of lime is transported to causticizing tank 19 by milk of lime pump 22 and sodium carbonate solution carries out causticizing reaction from liming vat 21.
(6) the causticization liquid that produces after the causticization divides two branches, directly be delivered to circulating mother liquor preparation vessel 25 by causticization liquid pump 20 a part of causticization liquid, part causticization liquid is sent into tube-type down-flow evaporator 23, evaporation concentration is after evaporating solns pump 24 is delivered to circulating mother liquor preparation vessel 25, prepare circulating mother liquor according to a little caustic alkali of proportioning restock, return step (1) batching by circulating mother liquor pump 26 then.
Claims (3)
1, a kind of device that utilizes aluminous fly-ash to produce white carbon black, it comprises by flyash storehouse (1), constant feeder (2), pulverized fuel ash slurry preparation vessel (3), liquid pump (4) is fed in desiliconization, the pulverized fuel ash slurry mixing system that circulating mother liquor preparation vessel (25) and circulating mother liquor pump (26) are formed, by double pipe heater (5), insulation remaining tank (6), desiliconization recycle pump (7), desiliconization slurry tank (8), filter feeding pump (9), square position formula filter (10), the pre-desiliconization of the flyash system that desiliconization ash filter cake groove (11) and desiliconization ash filter cake pump (12) are formed, by carbonization groove (13), pressure filter feeding pump (14), plate and frame(type)filter press (15), white carbon black filter cake groove (16), the Preparation of White Carbon Black system that white carbon black filter cake pump (17) and drying machine (18) are formed, and by liming vat (21), milk of lime pump (22), causticizing tank (19), causticization liquid pump (20), the causticization system that tube-type down-flow evaporator (23) and evaporating solns pump (24) are formed, it is characterized in that, described double pipe heater (5) is divided into two sections, be double pipe heater one (5-1) and double pipe heater two (5-2), pulverized fuel ash slurry preparation vessel (3) bottom pipe is fed liquid pump (4) outlet by desiliconization and is connected with the interior tube inlet of double pipe heater one (5-1) with double pipe heater two (5-2) respectively, the interior pipe outlet of double pipe heater one (5-1) links to each other with the interior tube inlet of double pipe heater two (5-2), the interior pipe outlet of double pipe heater two (5-2) is connected with the import at insulation remaining tank (6) top, the outlet conduit of insulation remaining tank (6) bottom divides two-way, one the road is connected to the inlet of desiliconization slurry tank (8), another road is connected to the outer tube inlet of double pipe heater one (5-1) by desiliconization recycle pump (7), the outer tube outlet of double pipe heater one (5-1) is connected to the inlet of desiliconization slurry tank (8), the outer tube of double pipe heater two (5-2) is connected with steam-pipe, the taphole of described tube-type down-flow evaporator (23) is connected to one road inlet of circulating mother liquor preparation vessel (25) by evaporating solns pump (24), it one the tunnel is that alkali replenishes pipeline that the in addition two-way of circulating mother liquor preparation vessel (25) enters the mouth, another road links to each other through the outlet of causticization liquid pump (20) with causticizing tank (19), the outlet conduit of circulating mother liquor preparation vessel (25) is connected to the inlet of pulverized fuel ash slurry preparation vessel (3) through circulating mother liquor pump (26), makes total system form closed cycle.
2, according to the described device of claim 1, it is characterized in that, establish the electrically heated tube bank in the described insulation remaining tank (6), keep temperature-resistant in the jar.
According to claim 1 or 2 described devices, it is characterized in that 3, the evaporation condensed water that described tube-type down-flow evaporator (23) produces is connected respectively to the inlet of desiliconization ash filter cake groove (11), white carbon black filter cake groove (16) and liming vat (21).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2008201080268U CN201284237Y (en) | 2008-05-26 | 2008-05-26 | Apparatus for producing white carbon black from high-alumina fly ash |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2008201080268U CN201284237Y (en) | 2008-05-26 | 2008-05-26 | Apparatus for producing white carbon black from high-alumina fly ash |
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| CN201284237Y true CN201284237Y (en) | 2009-08-05 |
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| CNU2008201080268U Expired - Lifetime CN201284237Y (en) | 2008-05-26 | 2008-05-26 | Apparatus for producing white carbon black from high-alumina fly ash |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101811713B (en) * | 2009-08-21 | 2012-06-13 | 东北大学设计研究院（有限公司） | Pipeline and dwell tank desiliconization method of fly ash |
| CN103360793A (en) * | 2012-03-27 | 2013-10-23 | 重庆市锦艺硅材料开发有限公司苏州分公司 | Low-dielectric constant filler and preparation technology thereof |
-
2008
- 2008-05-26 CN CNU2008201080268U patent/CN201284237Y/en not_active Expired - Lifetime
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101811713B (en) * | 2009-08-21 | 2012-06-13 | 东北大学设计研究院（有限公司） | Pipeline and dwell tank desiliconization method of fly ash |
| CN103360793A (en) * | 2012-03-27 | 2013-10-23 | 重庆市锦艺硅材料开发有限公司苏州分公司 | Low-dielectric constant filler and preparation technology thereof |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
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Granted publication date: 20090805 |