CN203454812U - Drying system for silicon-calcium slag via waste smoke heat of rotary kiln - Google Patents
Drying system for silicon-calcium slag via waste smoke heat of rotary kiln Download PDFInfo
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- CN203454812U CN203454812U CN201320270339.4U CN201320270339U CN203454812U CN 203454812 U CN203454812 U CN 203454812U CN 201320270339 U CN201320270339 U CN 201320270339U CN 203454812 U CN203454812 U CN 203454812U
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- calcium silicate
- silicate slag
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Abstract
The utility model discloses a drying system for silicon-calcium slag via waste smoke heat of a rotary kiln. The drying system comprises a clinker kiln purging system and a silicon-calcium slag removing system, wherein the clinker kiln purging system comprises orderly-connected a clinker kiln (1), a first dust remover (2) and a second dust remover (9); the silicon-calcium slag removing system comprises orderly-connected a silicon-calcium slag alkali-removing groove (5), a silicon-calcium slag filter (6), a drier (7) and a silicon-calcium slag storing room (8); the silicon-calcium slag alkali-removing groove (5) is connected with the clinker kiln (1) via two segments of digesters (4); and the drier (7) is respectively connected with the first dust remover (2) and the second dust remover (9). In the drying system for silicon-calcium slag via waste smoke heat of rotary kiln, the drier (7) is installed in the clinker kiln purging system and the silicon-calcium slag is dried by the lower temperature smoke waste heat, so utilization rate of waste heat is improved and energy consumption and production cost are reduced.
Description
Technical field
The utility model relates to calcium silicate slag technical field of drying, particularly a kind of system of utilizing rotary kiln fume afterheat to dry calcium silicate slag.
Background technology
In pre-desiliconizing with high alumina fly ash-soda lime method, produce in the process of aluminium oxide, produce a large amount of low temperature exhaust heats, comprise low temperature waste gas and low-temperature circulating water, wherein main energy loss comes from chamotte kiln fume emission heat loss.The rotary kiln of 3 60t grog/h that the applicant of take builds is example, and exhaust gas volumn is 470000m
3/ platform .h, 200 ℃ of left and right of electric precipitation exit gas temperature, the heat of so about 446GJ/h, accounts for the 20-30% of grog total energy consumption, is emitted endlessly, has caused the huge waste of the energy.
Meanwhile, when producing aluminium oxide after grog stripping, the residue of aluminum-extracted that also can produce 2.5-3 ton is calcium silicate slag.This is a kind of large Industrial Solid Waste, as not being used, will cause secondary pollution.Its main component is calcium oxide and silica, and mineral composition is with β-C
2s is main, Na after calcium silicate slag dealkalize
2o content is less than 1%, is the quality raw materials of producing the building material products such as cement.But from revolving-leaf type filter calcium silicate slag moisture content out, be 35-40%, the oven dry that the can not meet new dry process for cement production requirement that the comprehensive moisture of grinding system mill feed material is less than 15% of holding concurrently, is therefore necessary calcium silicate slag to be dried.The method of the dry residue of aluminum-extracted of conventional sintering method alumina producer is that heap dam stores natural drying at present, and the method shortcoming is that floor space is large, drying time is long, and owing to containing the strong β-C of 58%-79% left and right coagulability
2s(58% left and right), residue of aluminum-extracted can condense into the dam body that compression strength reaches 1MP left and right gradually, and brings very burden to later use.So calcium silicate slag need to adopt the method for flash baking, conventional spray drying tower, Rotatingandflashstreamingdrier, roller drier, the drying crusher etc. of mainly containing, thermal source is the hot blast that natural gas, coal gas or coal dust firing produce.This need to consume a large amount of fuel, and the oven dry cost of calcium silicate slag per ton, up to 26-95 unit left and right, has affected the economic benefit of project greatly, discharges a large amount of greenhouse gases CO simultaneously
2and the atmosphere pollution such as sulfur dioxide and nitrogen oxide.
In sum, on the one hand, in pre-desiliconizing with high alumina fly ash-soda lime method, produce the waste heat comprising in a large amount of low-temperature flue gas that produce in the process of aluminium oxide and be wasted, meanwhile, the oven dry of producing the produced simultaneously calcium silicate slag of aluminium oxide after grog stripping does not but have cost-effective method.
Utility model content
Technical problem to be solved in the utility model is to provide a kind of system of utilizing rotary kiln fume afterheat to dry calcium silicate slag, solves the problem that cost is high, aluminum oxide production process problem utilization rate of waste heat is low of the drying technology existence of existing calcium silicate slag.
For solving the problems of the technologies described above, the utility model provides a kind of system of utilizing rotary kiln fume afterheat to dry calcium silicate slag, comprise chamotte kiln smoke evacuation system and calcium silicate slag dreg removing system, described chamotte kiln smoke evacuation system comprises chamotte kiln, deduster one, the deduster two being linked in sequence, described calcium silicate slag dreg removing system comprises calcium silicate slag dealkalize groove, calcium silicate slag filter, drier, the calcium silicate slag bank being linked in sequence, and described calcium silicate slag dealkalize groove is connected with chamotte kiln by two sections of digesters, described drier is connected with described deduster one, deduster two respectively.
Further, described deduster one is connected with deduster two by drier.
Further, native system also comprises exhaust blower, and described deduster one is connected with drier by exhaust blower.
Further, described deduster one comprises cyclone static dust collector.
Further, described calcium silicate slag filter comprises revolving-leaf type filter.
The rotary kiln fume afterheat that utilizes that the utility model provides is dried the system of calcium silicate slag, by drier being arranged in chamotte kiln smoke evacuation system, utilize the dry calcium silicate slag of waste heat in low-temperature flue gas, therefore there is the utilization rate of waste heat of raising, reduce energy consumption and production cost.
Accompanying drawing explanation
Fig. 1 is dried the schematic flow sheet of the system of calcium silicate slag for the rotary kiln fume afterheat that utilizes that the utility model embodiment provides.
The specific embodiment
As shown in Figure 1, a kind of system of utilizing chamotte kiln fume afterheat to dry calcium silicate slag that the utility model embodiment provides, comprise chamotte kiln smoke evacuation system and calcium silicate slag dreg removing system, described chamotte kiln smoke evacuation system comprises the chamotte kiln 1 being linked in sequence, cyclone static dust collector 2, exhaust blower 3, deduster 9, chimney 10, described calcium silicate slag dreg removing system comprises the calcium silicate slag dealkalize groove 5 being linked in sequence, calcium silicate slag revolving-leaf type filter 6 and drier 7, wherein, calcium silicate slag dealkalize groove 5 is connected with chamotte kiln 1 by two sections of digesters 4, and drier 7 is arranged between calcium silicate slag revolving-leaf type filter 6 and calcium silicate slag bank 8, calcium silicate slag bank 8 is connected with cement plant 11 by belt conveyor, chamotte kiln waste gas after cyclone static dust collector 2 is connected with drier 7 by pipeline, drier 7 is connected with cyclone dust collectors 9 by pipeline, deduster 9 is connected with chimney 10 by pipeline.
Below a kind of operation principle of utilizing chamotte kiln fume afterheat to dry the system of calcium silicate slag that the utility model embodiment provides:
Before going out the 200 ℃ flue gases of chamotte kiln 1 after cyclone static dust collector 2, entering chimney 10, by pipeline, using it as thermal source, introduce drier 7, the moisture residue of aluminum-extracted of height forming through stripping, dealkalize, after separated with grog by chamotte kiln 1 is calcium silicate slag contact heat-exchanging.Flue-gas temperature drops to 130-150 ℃, after cyclone dust collectors 9 dedustings, by chimney 10, enter atmosphere, calcium silicate slag drops to below 15% at the interior moisture content of drier 7, delivers to calcium silicate slag bank 8 and preserves temporarily, then by automobile or belt, deliver to cement plant 11 and use as cement raw material by belt conveyor.This bootstrap system thermal source used is entirely alumina producer used heat resource, 3 chamotte kilns producing 240000 tons of aluminium oxide per year of take are example, the fume afterheat that chamotte kiln produces can all be dried the calcium silicate slag of 720,000 tons/year, can only save every year 3.69 ten thousand tons of standard coals, save and dry more than 1,800 ten thousand yuan of costs.
It is a unified total system that the utility model is communicated with the chamotte kiln smoke evacuation system He Quan factory dreg removing system of alumina by sintering factory by drier.Adopt this utility model to dry calcium silicate slag technology, only increased drier and cyclone dust collection, equipment investment is little; Use chamotte kiln fume waste heat as drying thermal source, calcium silicate slag water content is dropped to below 15%, reach cement produced with the dry method completely to raw material moisture requirement, do not increase any fuel consumption, played consumption reduction synergy and used; The waste gas of introducing from the two-stage of chamotte kiln smoke evacuation system is gathered dust, dustiness only has 100mg/Nm
3, calcium silicate slag alkali content recruitment is no more than to 0.1%, the product after oven dry meets the requirement of manufacture of cement to alkali content 0.8-1% completely; With the useless waste heat of industrial gas, dry Industrial Solid Waste moisture, adopt treatment of wastes with processes of wastes against one another pattern, improved comprehensive utilization of resources efficiency, avoided secondary pollution, to realizing resource and environment, the long-range sustainable development of economy and society has important exemplary role.
It should be noted last that, the above specific embodiment is only unrestricted in order to the technical solution of the utility model to be described, although the utility model is had been described in detail with reference to example, those of ordinary skill in the art is to be understood that, can modify or be equal to replacement the technical solution of the utility model, and not departing from the spirit and scope of technical solutions of the utility model, it all should be encompassed in the middle of claim scope of the present utility model.
Claims (5)
1. a system of utilizing rotary kiln fume afterheat to dry calcium silicate slag, comprise chamotte kiln smoke evacuation system and calcium silicate slag dreg removing system, described chamotte kiln smoke evacuation system comprises the chamotte kiln (1) being linked in sequence, deduster one (2), deduster two (9), described calcium silicate slag dreg removing system comprises the calcium silicate slag dealkalize groove (5) being linked in sequence, calcium silicate slag filter (6), drier (7), calcium silicate slag bank (8), and described calcium silicate slag dealkalize groove (5) is connected with chamotte kiln (1) by two sections of digesters (4), it is characterized in that, described drier (7) respectively with described deduster one (2), deduster two (9) connects.
2. utilize as claimed in claim 1 rotary kiln fume afterheat to dry the system of calcium silicate slag, it is characterized in that, described deduster one (2) is connected with deduster two (9) by drier (7).
3. utilize as claimed in claim 1 or 2 rotary kiln fume afterheat to dry the system of calcium silicate slag, it is characterized in that, also comprise exhaust blower (3), described deduster one (2) is connected with drier (7) by exhaust blower (3).
4. utilize as claimed in claim 3 rotary kiln fume afterheat to dry the system of calcium silicate slag, it is characterized in that, described deduster one (2) comprises cyclone static dust collector.
5. utilize as claimed in claim 4 rotary kiln fume afterheat to dry the system of calcium silicate slag, it is characterized in that, described calcium silicate slag filter (6) comprises revolving-leaf type filter.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320270339.4U CN203454812U (en) | 2013-05-17 | 2013-05-17 | Drying system for silicon-calcium slag via waste smoke heat of rotary kiln |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320270339.4U CN203454812U (en) | 2013-05-17 | 2013-05-17 | Drying system for silicon-calcium slag via waste smoke heat of rotary kiln |
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| CN203454812U true CN203454812U (en) | 2014-02-26 |
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| CN201320270339.4U Expired - Lifetime CN203454812U (en) | 2013-05-17 | 2013-05-17 | Drying system for silicon-calcium slag via waste smoke heat of rotary kiln |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105157408A (en) * | 2015-09-28 | 2015-12-16 | 成都易态科技有限公司 | Feed drying and purifying technology and system |
| CN105480992A (en) * | 2014-09-16 | 2016-04-13 | 沈阳铝镁设计研究院有限公司 | Drying method for ammonium sulfate crystal in fly ash-to-alumina process |
| CN110152575A (en) * | 2019-05-28 | 2019-08-23 | 浙江亿扬能源科技有限公司 | A kind of low concentration gas regenerative oxidation control system and intelligent operation method |
-
2013
- 2013-05-17 CN CN201320270339.4U patent/CN203454812U/en not_active Expired - Lifetime
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105480992A (en) * | 2014-09-16 | 2016-04-13 | 沈阳铝镁设计研究院有限公司 | Drying method for ammonium sulfate crystal in fly ash-to-alumina process |
| CN105157408A (en) * | 2015-09-28 | 2015-12-16 | 成都易态科技有限公司 | Feed drying and purifying technology and system |
| CN110152575A (en) * | 2019-05-28 | 2019-08-23 | 浙江亿扬能源科技有限公司 | A kind of low concentration gas regenerative oxidation control system and intelligent operation method |
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Granted publication date: 20140226 |
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| CX01 | Expiry of patent term |