CN101475098B - High temperature smoke positive pressure conveying treatment process and special equipment thereof - Google Patents
High temperature smoke positive pressure conveying treatment process and special equipment thereof Download PDFInfo
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- CN101475098B CN101475098B CN 200810238615 CN200810238615A CN101475098B CN 101475098 B CN101475098 B CN 101475098B CN 200810238615 CN200810238615 CN 200810238615 CN 200810238615 A CN200810238615 A CN 200810238615A CN 101475098 B CN101475098 B CN 101475098B
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Abstract
The invention discloses high-temperature smoke dust positive-pressure conveying processing technology, which comprises the following steps: collecting high-temperature smoke dust into a dust stratification hopper; screening and filtering the high-temperature smoke dust through a grizzly sieve arranged in the dust stratification hopper, and separating the high-temperature smoke dust from large block materials which cannot conveyed directly in the smoke dust; introducing the high-temperature smoke dust of which the large block materials are removed into a middle bin through a feed delivery pipe; when the smoke dust in the middle barn reaches a preset material position, opening a sealed feeding valve first, and then opening a first automatic trip valve; simultaneously, introducing high-pressure gas into the middle bin to make the smoke dust enter a delivery pump bin; and when the smoke dust in the delivery pump bin reaches the preset material position, stopping introducing the high-pressure gas into the middle bin, cutting off a channel between the middle bin and the delivery pump bin, and introducing the high-pressure gas into the delivery pump bin, and delivering the smoke dust to a destination bin by the high-pressure gas. The whole technological process is finished under the totally-sealed condition. The processing technology can cancel the open transportation of the smoke dust, adopt sealed type transportation, save labor, and put an end to material loss and environmental pollution.
Description
Technical field
The present invention relates to a kind of dust treatment technology of field of metallurgy, exactly relate to a kind of high temperature smoke positive pressure conveying treatment process.
Background technology
At metallurgy industry, all very high by the high-temperature flue gas dustiness of discharging in the metallurgical furnace, contain a large amount of valuable metals in this part flue dust, but also can bring a lot of negative effects, must recycle this part flue dust to following one production process and fume extractor.At present, two kinds of processing methods are arranged substantially.First kind of technological process of being adopted is: high temperature dust flue gas → waste heat boiler → high-temperature smoke natural subsidence → ash bucket collection → scraper plate transportation → sealing discharging valve → fine grained flue dust negative pressure transportation → bulky grain and block flue dust are collected the back fragmentation by the flue dust jar.Second kind of technological process of being adopted is: high temperature dust flue gas → waste heat boiler → high-temperature smoke natural subsidence → ash bucket collection → sealing discharging valve → flue dust jar focuses on after collecting.Owing to the flue dust temperature of discharging in metallurgical furnace is very high, before cooling, still be in fusion or semi-molten state, very easily bonding forms bulk, causes scraping transporter and blow-off valve fault, often needs blowing out to handle, and influences ordinary production; Negative pressure transportation requires very high to the granularity of material with relative air quantity, and flue dust often will rely on deashing device to collect after sedimentation, be difficult to guarantee that material is even, influence the effect of negative pressure transportation, negative pressure transportation also can be taken the pernicious gas in the boiler out of contaminated environment, and negative pressure transportation also has shortcomings such as investment is big, equipment is many, floor area is big simultaneously; Collected detailed catalogue flue dust is easy to scatter and flies upward in transportation and treating process, causes the loss and the serious environment pollution of valuables material, also can take great amount of manpower and material resources simultaneously.
Summary of the invention
The object of the invention provides high temperature smoke positive pressure conveying treatment process, and it can solve in the metallurgy industry, and high temperature also contains material loss and the problem of environmental pollution of lump material in the middle of transportation.Its principle is based on the guiding theory that flue dust does not land, overcome the above-mentioned defective that traditional handicraft exists, its main contents are characterized as: adopt concentrated phase malleation air-flow delivery technology, cancellation scraping transporter, sealing discharging valve, negative pressure transportation, flue dust jar, guaranteeing that high-temperature smoke is finished under hermetic situation collects and carries, and the race that the transportation of stopping to open a way brings, phenomenon such as emits, spreads.Technology of the present invention is simple, and is easy to operate, the efficient height, and energy consumption is low, and fault is few, and is easy to maintenance, and small investment has solved material loss and problem of environmental pollution; The high temperature smoke positive pressure conveying technology that the present invention proposes, to stop big, the problems such as floor area is big, equipment is many, fault rate is high, race is emitted seriously, contaminated environment of investment that traditional negative pressure transportation technology is brought exactly, to solve high temperature simultaneously and contain of the damage of the material of bulk, guarantee the service life of inlet valve malleation transmission pump storehouse inlet valve.
The present invention is achieved by the following technical solutions: a kind of high temperature smoke positive pressure conveying treatment process, it is characterized in that: may further comprise the steps: 1. high-temperature smoke is collected in the ash bucket, utilize the diagrid in the ash bucket that high-temperature smoke is carried out screening and filtering, with the bulk materials not directly carried in the flue dust by isolating in the high-temperature smoke; 2. the high-temperature smoke of screening being removed bulk materials is in tremie pipe imports intermediate bin, when the flue dust in the intermediate bin reaches predetermined material level, open the sealing inlet valve earlier, open first automatic stop valve again, feed high pressure gas drive flue dust to intermediate bin simultaneously and enter in the transmission pump storehouse; 3. after flue dust in the transmission pump storehouse reaches predetermined material level, stop logical high pressure gas in intermediate bin, and cut off the path between intermediate bin and the transmission pump storehouse, feed high pressure gas again in the transmission pump storehouse, high pressure gas are transported to the terminal point storehouse with flue dust; Above-mentioned whole process flow all is to finish under whole sealing status.1. the isolated bulk materials of not directly carrying is scleroid, king size to step in, crusher can't broken lump material separately, earlier bulk materials is inserted centralized collection in the coarse fodder bucket, delivers to the crushing system pulverization process again.Step in 1. the isolated bulk materials of not directly carrying be loosely organized lump material, bulk materials will directly be sent in the crusher and pulverize, and enter the high-temperature smoke of intermediate bin after screening after the pulverizing and 2. handle according to step.The flue dust temperature of carrying is 50 ℃-950 ℃, bulk density: 1-3.8t/m
3,, the percentage by weight of the lump material that contains≤20%, the particle diameter of lump material≤60% inner diameter of delivery tube.Carry, pressurize, help blow, fluidisation is with the pressure of high pressure gas: 0.2-1.0MPa, the weight ratio of material conveying gas: 100-160/1, temperature: 18-26 ℃.Diagrid is the diagrid of the need external force vibration of the diagrid that need not external force vibration of high spud angle or small inclination.
A kind of specialized equipment of high temperature smoke positive pressure conveying treatment process, comprise diagrid, diagrid is connected with an end of first conveying pipeline and an end of second conveying pipeline respectively, the other end of second conveying pipeline is connected with intermediate bin, intermediate bin is connected with the transmission pump storehouse by the 3rd conveying pipeline, the hand off valve and first automatic stop valve are installed on the 3rd conveying pipeline, offer admission port respectively on intermediate bin and the transmission pump storehouse, the sealing inlet valve is installed on the transmission pump storehouse, the sealing inlet valve is connected with the 3rd conveying pipeline and communicates breaker mounting and blow-off valve on first conveying pipeline.The fluidizer of installing on the admission port of intermediate bin, fluidizer is connected with storage tank by first total air channel.Storage tank is connected with second total air channel, and second total air channel is connected with first air channel, and first air channel is connected with the transmission pump storehouse.Second total air channel is connected with the 3rd air channel with second air channel respectively, and second air channel is connected with the middle part in transmission pump storehouse, and the 3rd air channel is connected with the discharging opening place in transmission pump storehouse.
The principle that high temperature smoke positive pressure is carried is as follows:
The high temperature smoke positive pressure conveying technology that the present invention proposes is exactly the open circuit transportation that will cancel high-temperature smoke, adopts hermetic collection and mode of movement, stops the wasting of resources and environmental pollution.
At the copper smelting plant that adopts flash copper metallurgy technology, by the flue-gas temperature of discharging in the stove up to 1320 ℃ about, wherein be mingled with a large amount of flue dust.This part flue dust is made up of metal, non-metal and sulfide thereof and oxide, and the fusing point of most of flue dust is all very high, even has and surpass 1200 ℃.This part flue dust enters waste heat boiler, before not lowering the temperature, high-temperature zone is in fusion and semi-molten state, though a lot of smelteries have adopted the sulphating technology, but, be easy to cohere mutually big even material piece super large of formation in the joint portion of waste heat boiler and body of heater because of sulfation reaction is just carrying out below 800 ℃.This part bulk major part is made up of refractory element and cmpd thereof, and behind the natural cooling, quality is hard not crisp, in case come off, can cause the stuck and chain rupture of discharge scraper plate.The transition warm area of leading portion in the waste heat boiler Department of Radiation, flue dust mostly is graininess, but still some is fusion and semi-molten state, on boiler tube wall, be easy to be removed by deashing device, be the fritter sheet, this part flue dust negative pressure transportation intractable, broken again after needing the flue dust jar to collect.Enter into the flue dust of waste heat boiler Department of Radiation back segment and convection section, because adopted the sulphating technology, flue dust mostly is loose sulfate fine grained, but the hygroscopic property of sulfate is very strong, and the gas that negative pressure transportation is used is ambient air, and its humidity is subjected to climatic influences very big, flue dust meeting moisture absorption in the process of negative pressure transportation, consequently cause delivery duct to stop up, flue dust hardens in the terminal point storehouse, and cloth bag life-span weak point gathers dust in the terminal point storehouse.Owing to the flue gas S0 that in stove, discharges
2Concentration is all very high, and for preventing smoke condensation, the flue-gas temperature of waste heat boiler Department of Radiation outlet generally is controlled at 650 ℃-720 ℃, and the flue-gas temperature of waste heat boiler convection section outlet generally is controlled at 350 ℃-420 ℃.In sum, the flue dust temperature major part of collecting in the waste heat boiler and contains the lump material of percentage by weight 5%-10% between 300 ℃-950 ℃.
Profitable fruit of the present invention: the open circuit transportation of its desirable smoke elimination dirt, adopt the sealed type transportation, save labour power, stop material loss and environmental pollution; Applicable area to material is big, and the capacity adjustment space is big; Equipment investment is few, and fault rate is low, and Maintenance and Repair are convenient, do not influence production; Technology is simple, and the degree of automation height is easy to operate, safe and reliable.
Description of drawings
Fig. 1 is the structural representation of described specialized equipment of the present invention; Fig. 2 is another structural representation of specialized equipment of the present invention.
Number in the figure: 1 diagrid, 2 blow-off valves, 3 disintegrating machines, 4 intermediate bins, 5 fluidizers, 6 hand off valves, 7 first automatic stop valves, 8 sealing inlet valves, 9 delivery pump storehouses, 10 hand-operated valves, 11 second automatic stop valves, 12 pressurizing valves, 13 transfer valves 14 help and blow 22 second total air channels, 21 first air channels, 20 second air channels, valve 15 coarse fodder bucket 16 first conveying pipelines, 17 second conveying pipeline 18 the 3rd conveying pipeline 19 the 3rd air channel, 23 first total air channel 24 air accumulators, 25 crushing systems, 26 ash buckets.
The specific embodiment
High temperature smoke positive pressure conveying treatment process of the present invention, high-temperature smoke flue dust after diagrid 1 screening is divided into two parts, continue to carry through two-way respectively, one the tunnel is the bulk materials of not directly carrying in the flue dust, bulk materials is sent into breaker and is pulverized, and the material after the pulverizing is in pipeline is sent into intermediate bin 4; Another road is the flue dust of carrying under the sieve, and this part flue dust can be directly in tremie pipe imports intermediate bin 4; When the flue dust in the intermediate bin 4 reaches predetermined material level, in intermediate bin 4, feed fluidizing gas, the flue dust that fluidizing gas drives in the intermediate bin 4 enters in the transmission pump storehouse 9, after flue dust in the transmission pump storehouse 9 reaches predetermined material level, stop through-flow oxidizing gases in intermediate bin 4, and the path between stifled disconnected intermediate bin 4 and the transmission pump storehouse 9, in transmission pump storehouse 9, feeding high pressure gas again, high pressure gas are transported to the terminal point storehouse with flue dust; Above-mentioned whole process flow all is to finish under whole sealing status.Diagrid 1 can be installed in the ash bucket of waste heat boiler.Diagrid 1 can be the diagrid of the need external force vibration of the diagrid that need not external force vibration of high spud angle or small inclination.
Quality according to the bulk materials of not directly carrying in the flue dust is different with volume, processing method can be different: if not directly the bulk materials of carrying is the lump material that hard, especially big, the independent crusher of quality can't be handled, after sifting out by diagrid 1, be introduced into coarse fodder bucket 15 centralized collection, delivering to independent crushing system again pulverizes, material after the pulverizing can enter intermediate bin 9, described crushing system is the bulk of the especially big or ultrahard that can't handle at independent crusher, the system that is made up of multiple existing disintegrating apparatus; If the bulk materials of not directly carrying in the flue dust is loosely organized lump material, directly enter crusher 3 after bulk materials is sifted out by diagrid 1 and pulverize, enter intermediate bin 9 after the pulverizing.
The flue dust temperature that is delivered to diagrid 1 is 50 ℃-950 ℃, bulk density: 1-3.8t/m
3', the percentage by weight of the lump material that contains≤20%, the particle diameter of lump material≤60% inner diameter of delivery tube.When the parameters of flue dust is in above-mentioned scope, be more suitable for handling with technology of the present invention.
Pressure when high pressure gas: 0.2-1.0MPa, the weight ratio of material gas: 100-160/1 in the time of temperature: 18-26 ℃, can improve the production efficiency of technology.
A kind of specialized equipment of high temperature smoke positive pressure conveying treatment process, comprise diagrid 1, diagrid 1 is connected with an end of first conveying pipeline 16 and an end of second conveying pipeline 17 respectively, the other end of second conveying pipeline 17 is connected with intermediate bin 4, intermediate bin 4 is connected with transmission pump storehouse 9 by the 3rd conveying pipeline 18, the hand off valve 6 and first automatic stop valve 7 are installed on the 3rd conveying pipeline 18, offer admission port respectively on intermediate bin 4 and the transmission pump storehouse 9, sealing inlet valve 8 is installed on the transmission pump storehouse 9, sealing inlet valve 8 is connected with the 3rd conveying pipeline 18 and communicates breaker mounting 3 on first conveying pipeline 16.Hand off valve 6 can not influence again when producing in maintenance closes, and produces and opens often; First automatic stop valve 7 can prevent that high-temperature smoke and bulk are to sealing the damage of charging valve body and sealing element.
The fluidizer of installing on the admission port of intermediate bin 45, fluidizer 5 is connected with storage tank 24 by first total air channel 23.Be that storage tank 24 can be respectively intermediate bin 4 and transmission pump storehouse 9 provides high pressure gas or pressurized air.
Be the input of convenient control high pressure gas, storage tank 24 is connected with second total air channel 22, and second total air channel 22 is connected with first air channel 21, and first air channel 21 is connected with transmission pump storehouse 9, and pressurizing valve 12 is installed on first air channel 21.For the switching of convenient control storage tank 24, can on first total air channel 23 and second total air channel 22, respectively pacify a hand valve 10.Second automatic stop valve 11 is installed on second total air channel 22, but second automatic stop valve, 11 automatic guidances, second total air channel, 22 break-makes.
For guaranteeing that material is by discharging smoothly in the transmission pump storehouse 9, second total air channel 22 can be connected with the 3rd air channel 19 with second air channel 20 respectively, second air channel 20 is connected with the middle part in transmission pump storehouse 9, the 3rd air channel 19 is connected with the discharging opening place in transmission pump storehouse 9, install on second air channel 20 to install to help on transfer valve 13, the three air channels 19 and blow valve 14.First air channel 21 is pressurization air channels, and second air channel 20 is to carry the air channel, and the 3rd air channel 19 that is installed on the delivery duct is to help to blow anti-blocking air channel, helps that to blow anti-blocking air channel can be one or more uses arranged side by side.
60% of the diameter of described block maximum gauge≤delivery pipe, percentage by weight≤1% that material is moisture.
Specific embodiment is as follows:
High temperature and contain block flue dust in waste heat boiler by deashing device clearly down after, the bulk materials that can not be carried by pre-buried inclined grizzly 1 in the ash bucket of waste heat boiler separates, the flue dust that sieve can be carried down is in tremie pipe imports to intermediate bin 4.In production reality, the bulk that can not carry that produces only accounts for below 10% of flue dust weight,, king size lump material hard for quality, for example, the bulk materials that the waste heat boiler high-temperature zone of flash blowing produces, as shown in the figure, be discharged in the coarse fodder bucket, focus on by crushing system independently by the blow-off valve of be interrupted opening 2.For the comparatively loose lump material of structure, as shown in the figure, be discharged in the leak free crusher 3 that is subjected to chain control by the blow-off valve of be interrupted opening 2 and be broken into the material that to carry, in tremie pipe imports to intermediate bin 4.High-temperature smoke in intermediate bin reaches the material level that can carry, opens sealing inlet valve 8 earlier, opens first automatic stop valve 7 again, opens the fluidizer 5 of intermediate bin simultaneously, allows high-temperature smoke is smooth and easy to be added in the transmission pump storehouse; High-temperature smoke in the transmission pump storehouse reaches the material level that can carry, closes first automatic stop valve 7 earlier, closes the fluidizer 5 of intermediate bin simultaneously, closes sealing inlet valve 8 again; Start second automatic stop valve 11, by pressurizing valve 12, transfer valve 13, help and blow valve 14, high-temperature smoke is transported in the terminal point storehouse.
First automatic stop valve 7 of the present invention can be star rotovalve, push-pull valve, ball valve, semisphere valve, dome valve etc.; Sealing inlet valve 8 can be water-cooled valve, wear-resisting valve etc.
Fluidizer of the present invention is meant the drafting apparatus with microwell plate or detailed catalogue screen making; High pressure gas import in the intermediate bin through " fluidizer ", and flow is very little, only destroys the tension force of storeroom, increase the flowing power of material, and material can oppositely not enter in the diagrid 1.Fluidizing gas of the present invention is meant the high pressure gas that are passed in the fluidizer.
Crusher of the present invention can be jaw crusher, relative rolling type crusher, cavate crusher; Crushing system is meant with two or two systems that above crusher is formed.
Technical solutions according to the invention are not restricted in the scope of embodiment of the present invention.The present invention not technology contents of detailed description is known technology.
Claims (9)
1. high temperature smoke positive pressure conveying treatment process is characterized in that: may further comprise the steps:
1. high-temperature smoke is collected in the ash bucket, utilizes the diagrid (1) in the ash bucket that high-temperature smoke is carried out screening and filtering, with the bulk materials not directly carried in the flue dust by isolating in the high-temperature smoke;
2. the high-temperature smoke of screening being removed bulk materials is in tremie pipe imports intermediate bin (4), when the flue dust in the intermediate bin (4) reaches predetermined material level, open sealing inlet valve (8) earlier, open first automatic stop valve (7) again, feed high pressure gas drive flue dust to intermediate bin (4) simultaneously and enter in the transmission pump storehouse (9);
3. after flue dust in transmission pump storehouse (9) reaches predetermined material level, stop logical high pressure gas in intermediate bin (4), and the path between cut-out intermediate bin (4) and transmission pump storehouse (9), in transmission pump storehouse (9), feeding high pressure gas again, high pressure gas are transported to the terminal point storehouse with flue dust;
Above-mentioned whole process flow all is to finish under whole sealing status.
2. a kind of high temperature smoke positive pressure conveying treatment process according to claim 1, it is characterized in that: step in 1. the isolated bulk materials of not directly carrying be loosely organized lump material, bulk materials will directly be sent in the crusher and pulverize, and enter the high-temperature smoke of intermediate bin (9) after screening after the pulverizing and 2. handle according to step.
3. a kind of high temperature smoke positive pressure conveying treatment process according to claim 1 and 2 is characterized in that: the flue dust temperature of conveying is 50 ℃-950 ℃, bulk density: 1-3.8t/m
3, the percentage by weight of the lump material that contains≤20%, the particle diameter of lump material≤60% inner diameter of delivery tube.
4. a kind of high temperature smoke positive pressure conveying treatment process according to claim 1 and 2 is characterized in that: carry, pressurize, help blow, fluidisation is with the pressure of high pressure gas: 0.2-1.0MPa, the weight ratio of material conveying gas: 100-160/1, temperature: 18-26 ℃.
5. a kind of high temperature smoke positive pressure conveying treatment process according to claim 1 and 2 is characterized in that: diagrid (1) is the diagrid of the need external force vibration of the diagrid that need not external force vibration of high spud angle or small inclination.
6. the specialized equipment of a high temperature smoke positive pressure conveying treatment process, it is characterized in that: comprise diagrid (1), diagrid (1) is installed in the ash bucket (26), ash bucket (26) is connected with an end of first conveying pipeline (16) and an end of second conveying pipeline (17) respectively, the other end of second conveying pipeline (17) is connected with intermediate bin (4), intermediate bin (4) is connected with transmission pump storehouse (9) by the 3rd conveying pipeline (18), the 3rd conveying pipeline (18) is gone up hand off valve (6) and first automatic stop valve (7) is installed, offer admission port respectively on intermediate bin (4) and transmission pump storehouse (9), transmission pump storehouse (9) is gone up sealing inlet valve (8) is installed, sealing inlet valve (8) is connected with the 3rd conveying pipeline (18) and communicates, and first conveying pipeline (16) is gone up breaker mounting (3).
7. the specialized equipment of a kind of high temperature smoke positive pressure conveying treatment process according to claim 6, it is characterized in that: the fluidizer of installing on the bulkhead of intermediate bin (4) (5), fluidizer (5) is connected with storage tank (24) by first total air channel (23).
8. the specialized equipment of a kind of high temperature smoke positive pressure conveying treatment process according to claim 7, it is characterized in that: storage tank (24) is connected with second total air channel (22), second total air channel (22) is connected with first air channel (21), and first air channel (21) are connected with transmission pump storehouse (9).
9. the specialized equipment of a kind of high temperature smoke positive pressure conveying treatment process according to claim 8, it is characterized in that: second total air channel (22) is connected with the 3rd air channel (19) with second air channel (20) respectively, second air channel (20) is connected with the middle part of transmission pump storehouse (9), and the 3rd air channel (19) are connected with the discharging opening place of transmission pump storehouse (9).
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| CN102980179A (en) * | 2012-11-06 | 2013-03-20 | 镇江市电站辅机厂有限公司 | Circulating fluidized bed boiler bed material adding conveying device |
| CA2886345C (en) * | 2012-12-04 | 2018-10-23 | Nestec S.A. | Apparatus and method for transferring and pressurizing powder |
| CN103274217B (en) * | 2013-06-20 | 2016-03-02 | 中天钢铁集团有限公司 | The novel defeated coal cone pump of outlet anti-clogging |
| CN103287856A (en) * | 2013-06-24 | 2013-09-11 | 中冶赛迪工程技术股份有限公司 | Pneumatic conveying technology for gravitational dust collection ash |
| CN103612914B (en) * | 2013-11-28 | 2016-07-27 | 中国中煤能源集团有限公司 | The conveyer device of High temperature powder semi-coke and cooling system |
| LU92813B1 (en) * | 2015-09-02 | 2017-03-20 | Wurth Paul Sa | Enhanced pressurising of bulk material in lock hoppers |
| CN105154682A (en) * | 2015-09-25 | 2015-12-16 | 中国瑞林工程技术有限公司 | Smelting smoke conveying device and smelting smoke conveying method |
| CN107523687A (en) * | 2017-08-11 | 2017-12-29 | 赤峰中色锌业有限公司 | A kind of fluidizing reactor paving furnace apparatus and paving stove method |
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