CN202511639U - Anti-blocking device of rotary hearth furnace fume system in metallurgy solid waste disposal - Google Patents
Anti-blocking device of rotary hearth furnace fume system in metallurgy solid waste disposal Download PDFInfo
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- CN202511639U CN202511639U CN2012200852031U CN201220085203U CN202511639U CN 202511639 U CN202511639 U CN 202511639U CN 2012200852031 U CN2012200852031 U CN 2012200852031U CN 201220085203 U CN201220085203 U CN 201220085203U CN 202511639 U CN202511639 U CN 202511639U
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- rotary hearth
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Abstract
The utility model discloses an anti-blocking device of a rotary hearth furnace fume system in metallurgy solid waste disposal. The device comprises a sediment chamber which is connected with a fume outlet of the rotary hearth furnace, a high-temperature heat exchanger which is connected with the sediment chamber, a middle-temperature heat exchanger which is connected with the high-temperature heat exchanger, a cold air adjustment device which is connected with the middle-temperature heat exchanger, a low-temperature heat exchanger which is connected with the cold air adjustment device, a bag dust collector which is connected with the low-temperature heat exchanger and a blower which is connected with the bag dust collector. The temperature and flow fields in the rotary hearth furnace fume system are controlled, particularly, the temperature range of all nodes in the system is controlled within a temperature range in which high-temperature sticking and blocking and low-temperature sticking and blocking are avoided at the same time, then the high-temperature sticking and blocking and low-temperature sticking and blocking in the system cannot occur, the problem of fume system blocking in the recycling process of zinc and iron in the rotary hearth furnace metallurgical dust solid waste disposal is solved, and the rotary hearth furnace can operate continuously.
Description
Technical field
The utility model relates to a kind of anti-block apparatus that produces flue gas of smelting, the particularly metallurgical solid useless rotary hearth furnace flue gas system anti-block apparatus of handling.
Background technology
In recent years, domestic steel industry development is rapid, and Chinese crude steel output had reached 6.27 hundred million tons in 2010, accounted for 50% of the world.Along with the growth of iron and steel output, Iron and Steel Production has inevitably produced the solid waste that contains the unacceptable harmful element composition of Ferrous Metallurgy in a large number, has strengthened the iron content element resource and has reclaimed and the smoke gas treatment difficulty.Generally all contain metals such as zinc, lead in the dust, adopt the method for traditional sintering processes can make zinc, plumbous enrichment, cause furnace nodulation, influence smooth operation of furnace and can damage smelting equipment.Through tackling key problem for many years, developed the technology that coal-based rotary hearth furnace method reclaims harmful element in the dust both at home and abroad.This technology is carried out high temperature reduction with the element that contains iron and carbon in the dust; But the zinc in the dust and other alkali metal etc. exist in the flue gas, and uncontrollable discharge and wet-treating flue gas cause severe environmental pollution, carry out flue gas in a organized way and handle; The flue gas system that results in blockage can not move rotary hearth furnace continuously.
See also shown in Figure 1, for present both at home and abroad rotary hearth furnace smoke processing system basically with reference to the rotary hearth furnace dust processing method of Nippon Steel.Flue gas system is made up of heat exchanger, waste heat boiler, sack cleaner etc.Heat exchanger is used for the preheated burning air, and waste heat boiler is to utilize waste heat recovery steam, and sack cleaner is used for flue gas ash removal and reclaims the secondary zinc oxide dust.
Though the method that the above-mentioned flue gas of rotary hearth furnace is handled can satisfy the requirement of reclaiming fume afterheat basically; Obvious defects is also arranged; Because contain zinc and other alkali metal component in the flue gas, the kiln gas system jams is serious at the bottom of the production process transfer, make heat exchanger, waste heat boiler, sack cleaner all can not move continuously for a long time; Frequent cleaning tamper and the replacing deduster cloth bag of stopping production, the production of rotary hearth furnace normally operation continuously.
The obstruction of flue gas system causes a series of consequences for the production run of rotary hearth furnace: it is excessive that the flue gas system obstruction causes the interior malleation of rotary hearth furnace to cause coal gas; Destroyed that the adhesive viscosity that reducing condition in the rotary hearth furnace and equipment operation, security descend, especially cause the rotary hearth furnace flue gas system to stop up is big, corrosivity and water imbibition be strong; And combine to form dense matter with zinc oxide dust, cleaning difficulty and equipment are fragile to be prone to cause the cleaning personnel to poison.
So, need a kind of new technical scheme to address the above problem.
Summary of the invention
To above-mentioned existing in prior technology problem and shortage, the purpose of the utility model provides the useless admittedly rotary hearth furnace flue gas system anti-block apparatus of handling of a kind of metallurgy.
For realizing above-mentioned purpose, the metallurgical solid useless rotary hearth furnace flue gas system anti-block apparatus of handling of the utility model can adopt following technical scheme:
The useless admittedly rotary hearth furnace flue gas system anti-block apparatus of handling of a kind of metallurgy comprises the expansion chamber of connection rotary hearth furnace exhanst gas outlet, the high-temperature heat-exchanging that connects expansion chamber, the mid temperature heat exchanger that connects high-temperature heat-exchanging, the cold wind adjusting device that connects mid temperature heat exchanger, the cryogenic heat exchanger that connects the cold wind adjusting device, the sack cleaner of connection cryogenic heat exchanger and the blower fan that connects sack cleaner; Wherein: rotary hearth furnace exhanst gas outlet temperature is arranged on more than 950 ℃, and in flue gas system, needs the certain flow velocity of maintenance before the high-temperature heat-exchanging, and according to the characteristic of rotary hearth furnace flue gas, reynolds number Re is more than 45000; The mid temperature heat exchanger inlet temperature guarantees that more than 750 ℃, the mid temperature heat exchanger outlet temperature is lower than 450 ℃, and will in 4 seconds, accomplish from 750 ℃-450 ℃ cooling; The cryogenic heat exchanger inlet temperature is higher than 350 ℃, and the cryogenic heat exchanger outlet temperature is lower than 220 ℃, and cooling needs in 3 seconds, to accomplish; The sack cleaner inlet temperature remains on 170 ℃～190 ℃.The relative humidity of flue gas is less than 15%.
The utility model is compared with prior art: the useless admittedly rotary hearth furnace flue gas system anti-block apparatus of handling of the metallurgy of the utility model; Simple in structure; Invest little, safe and reliable, through temperature and the flow field in the regulation and control rotary hearth furnace flue gas system; Especially intrasystem each node temperature scope is controlled at and avoids producing high temperature simultaneously and be stained with stifled and low temperature is stained with stifled temperature range; Make that can not produce high temperature in the system is stained with stifled and low temperature is stained with stifledly, solved that the rotary hearth furnace metallurgical dust is useless admittedly handles flue gas system blocking problem in the zinc-iron removal process, can realize that rotary hearth furnace moves continuously.
Description of drawings
Fig. 1 is the flow chart of the rotary hearth furnace dust processing method of prior art.
Fig. 2 is the structural representation of kiln gas system anti-block apparatus at the bottom of the utility model transfer.
The specific embodiment
Below in conjunction with the accompanying drawing and the specific embodiment; Further illustrate the utility model; Should understand the following specific embodiment only be used to the utility model is described and be not used in the restriction the utility model scope; After having read the utility model, those skilled in the art all fall within the application's accompanying claims institute restricted portion to the modification of the various equivalent form of values of the utility model.
Please combine shown in Figure 2; The useless admittedly processing rotary hearth furnace of the metallurgy of the utility model flue gas system anti-block apparatus comprises expansion chamber 1, connects the high-temperature heat-exchanging 2 of expansion chamber 1, the mid temperature heat exchanger 3 that connects high-temperature heat-exchanging 2, the cold wind adjusting device 4 that connects mid temperature heat exchanger 3, the cryogenic heat exchanger 5 that connects cold wind adjusting device 4, the sack cleaner 6 of connection cryogenic heat exchanger 5 and the blower fan 7 that connects sack cleaner 6.Said cryogenic heat exchanger 5 is provided with 2, and these two cryogenic heat exchangers, 5 parallel connections are provided with, and one of them is subsequent use.
Because main matter---the alkali metal compound that discovery results in blockage, in rotary hearth furnace was produced, its boiling point and fusing point were lower; Water imbibition is strong, and when temperature was lower than uniform temperature, alkali halide began to condense; Through field assay, be stained with and stifled divide high temperature to be stained with stifled and low temperature is stained with stifled:
High temperature is stained with stifled, i.e. 600-500 ℃ of scope, and gas-liquid phase transition takes place in this section in the part alkali metal compound, and the halide bonding produces and is stained with stifledly, and Duan Weiyi is stained with stifled section here, and it is many to be stained with stifled thing.
Low temperature is stained with stifled, 200-300 ℃ of scope, is stained with stifled for low melting point halide here; When zinc halide content is high here, be stained with and block up seriously, and the Yishui River divides deliquescence to become hydrate; Hydrate corrosivity is strong, and is serious to equipment damage, in addition; Hydrate combines with exhaust gas dust to generate fine and close adhesive again, is difficult to cleaning.
So in the method, rotary hearth furnace exhanst gas outlet temperature is arranged on more than 950 ℃, and in flue gas system, needs the certain flow velocity of maintenance before the high-temperature heat-exchanging 2, and according to the characteristic of rotary hearth furnace flue gas, reynolds number Re is more than 45000.Mid temperature heat exchanger 3 inlet temperatures guarantee that more than 750 ℃, mid temperature heat exchanger 3 outlet temperatures are lower than 450 ℃, and will in 4 seconds, accomplish from 750 ℃-450 ℃ cooling.Cryogenic heat exchanger 5 inlet temperatures are higher than 350 ℃, and cryogenic heat exchanger 5 outlet temperatures are lower than 220 ℃, and cooling needs in 3 seconds, to accomplish.Sack cleaner 6 inlet temperatures remain on 170 ℃～190 ℃.Flue gas is reclaimed the back at zinc-containing dust by sack cleaner 6 and is drawn discharging by blower fan 7.
Like this, guaranteed that in the inlet of high-temperature heat-exchanging 2 and mid temperature heat exchanger 3 and exit temperature avoided 600-500 ℃ high temperature and be stained with stifled scope, prevented that high temperature is stained with stifled generation; Simultaneously, guaranteed that in the porch of the inlet of cryogenic heat exchanger 5 and exit and sack cleaner 6 temperature avoided 200-300 ℃ low temperature and be stained with stifled scope, prevented that low temperature is stained with stifled generation.Be stained with stifled and low temperature is stained with stifledly thereby make whole system that high temperature can not take place, solved that the rotary hearth furnace metallurgical dust is useless admittedly handles flue gas system blocking problem in the zinc-iron removal process, can realize that rotary hearth furnace moves continuously, the step that this method is implemented is the controlled cooling of more piece multiple spot.This metallurgy is useless admittedly, and to handle rotary hearth furnace flue gas system anti-blocking method controllability strong, invests for a short time, safe and reliable, can realize that rotary hearth furnace moves continuously.
Claims (3)
1. the useless admittedly rotary hearth furnace flue gas system anti-block apparatus of handling of metallurgy is characterized in that: comprise the expansion chamber (1) of connection rotary hearth furnace exhanst gas outlet, the high-temperature heat-exchanging (2) that connects expansion chamber (1), the mid temperature heat exchanger (3) that connects high-temperature heat-exchanging (2), the cold wind adjusting device (4) that connects mid temperature heat exchanger (3), the cryogenic heat exchanger (5) that connects cold wind adjusting device (4), the sack cleaner (6) of connection cryogenic heat exchanger (5) and the blower fan (7) that connects sack cleaner (6); Said rotary hearth furnace exhanst gas outlet temperature is arranged on more than 950 ℃, and said mid temperature heat exchanger (3) inlet temperature is more than 750 ℃, and mid temperature heat exchanger (3) outlet temperature is lower than 450 ℃; Cryogenic heat exchanger (5) inlet temperature is higher than 350 ℃, and cryogenic heat exchanger (5) outlet temperature is lower than 220 ℃; Sack cleaner (6) inlet temperature remains on 170 ℃～190 ℃.
2. the useless admittedly rotary hearth furnace flue gas system anti-block apparatus of handling of metallurgy according to claim 1, it is characterized in that: the relative humidity of flue gas is less than 15%.
3. the useless admittedly rotary hearth furnace flue gas system anti-block apparatus of handling of metallurgy according to claim 1, it is characterized in that: said cryogenic heat exchanger (5) is provided with two, and two cryogenic heat exchangers (5) parallel connection is provided with.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012200852031U CN202511639U (en) | 2012-03-08 | 2012-03-08 | Anti-blocking device of rotary hearth furnace fume system in metallurgy solid waste disposal |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012200852031U CN202511639U (en) | 2012-03-08 | 2012-03-08 | Anti-blocking device of rotary hearth furnace fume system in metallurgy solid waste disposal |
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| CN202511639U true CN202511639U (en) | 2012-10-31 |
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| CN2012200852031U Expired - Fee Related CN202511639U (en) | 2012-03-08 | 2012-03-08 | Anti-blocking device of rotary hearth furnace fume system in metallurgy solid waste disposal |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102628652A (en) * | 2012-03-08 | 2012-08-08 | 江苏沙钢集团有限公司 | Method for preventing blockage of smoke system of metallurgical solid waste treatment rotary hearth furnace |
| CN103063044A (en) * | 2013-01-17 | 2013-04-24 | 中国钢研科技集团有限公司 | Rotary hearth furnace flue gas waste heat utilization system and rotary hearth furnace flue gas waste heat utilization method |
-
2012
- 2012-03-08 CN CN2012200852031U patent/CN202511639U/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102628652A (en) * | 2012-03-08 | 2012-08-08 | 江苏沙钢集团有限公司 | Method for preventing blockage of smoke system of metallurgical solid waste treatment rotary hearth furnace |
| CN102628652B (en) * | 2012-03-08 | 2014-06-25 | 江苏沙钢集团有限公司 | Method for preventing blockage of smoke system of metallurgical solid waste treatment rotary hearth furnace |
| CN103063044A (en) * | 2013-01-17 | 2013-04-24 | 中国钢研科技集团有限公司 | Rotary hearth furnace flue gas waste heat utilization system and rotary hearth furnace flue gas waste heat utilization method |
| CN103063044B (en) * | 2013-01-17 | 2015-07-29 | 中国钢研科技集团有限公司 | Rotary hearth furnace smoke waste heat utilization system and rotary hearth furnace fume afterheat Application way |
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Legal Events
| Date | Code | Title | Description |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20121031 Termination date: 20190308 |