CN202427332U - Carbide slag powder-making system - Google Patents
Carbide slag powder-making system Download PDFInfo
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- CN202427332U CN202427332U CN201120550852XU CN201120550852U CN202427332U CN 202427332 U CN202427332 U CN 202427332U CN 201120550852X U CN201120550852X U CN 201120550852XU CN 201120550852 U CN201120550852 U CN 201120550852U CN 202427332 U CN202427332 U CN 202427332U
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- carbide slag
- rotary kiln
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Abstract
The utility model discloses a carbide slag powder-making system, belonging to the field of resource and environment protection. The carbide slag powder-making system comprises a drying system, a grinding system and a powder separating system, wherein the drying system comprises a rotary kiln, a kiln, a first draught fan and a rotary kiln blanking bin; one side of the rotary kiln is communicated with the kiln; the other side of the rotary kiln is communicated with the first draught fan and the rotary kiln blanking bin; the grinding system comprises a pre-grinding bin communicated with an outlet of the rotary kiln and a ball mill communicated with an outlet of the pre-grinding bin; the powder separating system comprises a powder separating machine communicated with an outlet of a ball mill; and the mounting parts of the rotary kiln blanking bin, the kiln and the pre-grinding bin are respectively provided with a bucket elevator. The carbide slag powder-making system is used for treating the carbide slag to be prepared into a qualified desulfurizing agent which is applied to wet desulphurization; and reducing substances of phosphorus, sulphur and the like contained in the carbide slag are oxidized in the high-temperature environment when the carbide slag is dried, and the reducing substances are screened more accurately to obtain a carbide slag desulfurizing agent with higher quality.
Description
Technical field
The utility model relates to resource and environment protection field, is specifically related to a kind of carbide slag pulverized coal preparation system.
Background technology
Domestic carbide is produced acetylene and is certainly led to ancillary industry refuse carbide slag (slurry), and carbide slag (slurry) mainly contains two digestion approach at present.The one, carbide slag slurries dehydration back is formed the raw materials for production of dried slag as building materials such as cement; The 2nd, use substituting the desulfurizing agent of calcium carbonate behind the carbide slag slurries filtration, purification as the power plant desulfurization system.
Zhejiang eight phases of steam power plant of hugeization group adopt the Zhejiang phenanthrene to reach the NID semi-dry desulfurizing process that dynamo-electric group company introduces Sweden ABB AB, with dry acetylene sludge powder as desulfurizing agent.The test data of carbide slag is Ca (OH)
2Content 91.2～96.1%, specific area 27.5～32.1m
2/ g, particle diameter≤50 μ m.Moisture 40% carbide slag is after drying and powder process two procedures, and moisture content is reduced to below 1.5%, can be directly as the desulfurizing agent use of flue gas desulphurization, and through detecting, Ca/S is 1.29 o'clock, and efficiency of dust collection reaches 99.8%, and desulfuration efficiency reaches 90.1%.Compare the lime desulfurization device that domestic other enterprises introduce, huge heat-transmission power plant reduces investment outlay over half, and the saving through resource reduces operating cost, has both realized the environmental protection maximizing efficiency, is reduced to minimum of a value to production cost again and produces cost and be reduced to minimum of a value.Actual motion through half a year; This device desulphurization cost is per hour less than red cent; And Nanjing enterprise same device desulphurization cost is 4 fens, calculates by operation in annual 7000 hours, and only this can practice thrift 11,200,000 yuan of operating cost expenses the whole year in huge heat-transmission power plant; Also can digest more than 4000 ton of carbide slag simultaneously, walk out the new approach of a treatment of wastes with processes of wastes against one another comprehensive utilization.
The carbide slag desulphurization system does not change the technological process of former flue gas desulfurization FGD; Therefore system had both possessed the ability to work of making desulfurizing agent with carbide slag; Also kept simultaneously the ability to work of making desulfurizing agent originally with lime, when carbide slag was in short supply, the still available lime of system was as desulfurizing agent work; Has suitable flexibility, for power plant offers convenience.
But the composition of solid particle is very complicated in the carbide slag slurries, except that calcium hydroxide, calcium oxide, also contains all kinds of solid particles such as carbon slag, silicon iron, and its granularity size all has distribution from several microns to tens millimeters.And carbide slag (slurry) is when using as desulfurizing agent; Can produce adverse consequences such as wearing and tearing, obstruction greater than 40 microns solid particles to the pipeline and the desulfurizing agent circulatory system of power plant desulfurization system; Therefore; Carbide slag (slurry) must be extractd harmful bulky grain the desulfurization instructions for use that just can meet power plant through purifying.
Carbide slag COD value is higher; It is unusual between 8～20mg/g according to the region that carbide slag COD value is detected in the laboratory; For gypsum oxidation in the desulphurization system very big influence is arranged, and handle the influence that certain degree is also arranged for the COD of the follow-up desulfurization wastewater of acetylene sludge-gypsum process desulphurization technology.
Application number is that 200810226761.3 Chinese invention patent discloses a kind of desulphurization system of circulating fluidized bed boiler, comprises drying system, hybrid system and pulverized coal preparation system.What the drying system of this desulphurization system adopted is dryer; Because adopt the dry carbide slag of hot blast, temperature is lower, EAT＜800 ℃; About 100 ℃ of leaving air temp; Reaction temperature is lower, oxygen content is not enough, and sulphur, phosphorus plasma remaining in the carbide slag can't oxidizedly will still be brought desulphurization system into, causes certain harmful effect for the oxidation of wet desulfurization system; What the pulverized coal preparation system of this desulphurization system adopted is the separation that vibratory sieve carries out particle, and carbide slag partly is prone to the suction humidity and stops up screen cloth when filtering tiny powder (less than 250 orders); This patent of invention disclosed method can only be applied to calcium injection and desulfurization system in the circulating fluid bed boiler, and desulfuration efficiency is low, can not directly apply to wet desulfurization system.
The utility model content
The utility model provides a kind of carbide slag pulverized coal preparation system; In the time of dry carbide slag with reducing substances oxidations under hot environment such as the phosphorus that contains in the carbide slag, sulphur; Screening system through more accurate, that operational reliability is higher obtains the higher carbide slag desulfurizing agent of quality.
A kind of carbide slag pulverized coal preparation system; Comprise drying system, grinding system with select powder system, described drying system to comprise rotary kiln, stove, first air-introduced machine and rotary kiln baiting storehouse; Described rotary kiln one side is communicated with stove, and opposite side is communicated with first air-introduced machine and rotary kiln baiting storehouse; Described grinding system comprises pre-grinding storehouse that is communicated with the rotary kiln outlet and the ball mill that is communicated with the outlet of pre-grinding storehouse; The described powder system that selects comprises the powder concentrator that is communicated with the ball mill outlet; Described rotary kiln baiting storehouse, stove and installation place, pre-grinding storehouse are equipped with bucket elevator.
The described two-stage dust arrester installation that selects powder system also to comprise to be positioned at the powder concentrator downstream, described two-stage dust arrester installation comprises cyclone separator and the gas tank dust-precipitator that connects successively, the outlet of said gas tank dust-precipitator is communicated with the inlet of second air-introduced machine; Preferably, described powder concentrator and two-stage dust arrester installation below are provided with the 3rd belt conveyor, and the outlet of said the 3rd belt conveyor connects finished product ash storehouse; More preferably, be provided with the cinder return duct between described powder concentrator and the ball mill.After powder concentrator carries out the particle diameter separation; Cinder returns ball mill through the cinder return duct again; Continuous circulation cinder grain; The soot particle particle diameter of guaranteeing to get into the 3rd belt conveyor and two-stage dust arrester installation is less than the particle diameter that system controlled, and its cinder grain constantly circulates between powder concentrator and ball mill, up to its particle diameter less than the desired particle diameter of system; Qualified particle diameter soot particle blanking to the three belt conveyors are until being delivered to finished bin; Thin soot particle provides power by second air-introduced machine, gets into cyclone separator and gas tank dust-precipitator successively with power wind, and collected soot particle blanking to the three belt conveyors are delivered to finished product ash storehouse.
Described drying system also comprises the bag filter that is arranged between the rotary kiln and first air-introduced machine; Described bag filter inlet is communicated with rotary kiln, outlet and is communicated with first air-introduced machine, conveying worm that the bottom is provided with to be communicated with the rotary kiln baiting storehouse, with bag filter except that under powder be delivered to rotary kiln again through conveying worm.
Be provided with two pre-grinding storehouses in the described grinding system, outlet below, described pre-grinding storehouse is provided with second belt conveyor, and described second belt conveyor outlet is communicated with the ball mill inlet.Break down or during situation such as underproduce, surplus, the pre-grinding storehouse has certain buffer capacity, is unlikely to make the production run of whole system to be affected at drying system.
The described drying system upper reaches also are provided with feed system, and said feed system comprises charging heap storehouse, the airing field in charging heap downstream, storehouse, the dried slag muck storehouse in downstream, airing field.Under the weather conditions condition of severe, the reserves in dried slag muck storehouse can be kept the production run of down-stream system certain hour, so that the unit that downstream possibly have influence on makes adjustment and counter-measure.
According to the particle diameter requirement of output calcium carbide ground-slag, described carbide slag is ground into 250-325 purpose particle in ball mill, improves the specific area of carbide slag powder, helps in the desulphurization system raising with the reaction speed and the degree of sulfur dioxide.
The beneficial effect of the utility model:
(1) the not only dry carbide slag of rotary kiln; Under the effect of high-temperature flue gas; Also with reducing substances oxidations under hot environment such as the phosphorus that contains in the carbide slag, sulphur; The COD value that reduces carbide slag simultaneously reaches more than 80%, improves the carbide slag quality, avoids this type of material to bring in the desulphurization system and causes adverse effect; Drop to 0～1.5% through the dried carbide slag moisture content of drying system, part calcium hydroxide at high temperature resolves into calcium oxide, and quality lightens, and increases the reserves 15～30% of desulfurizing agent;
(2) the pre-grinding storehouse is set between drying system and ball mill, breaks down or during situation such as underproduce, surplus, the pre-grinding storehouse has certain buffer capacity, is unlikely to make the production run of whole system to be affected at drying system;
(3) powder concentrator utilizes power wind to screen, and the screening precision is high, because the purging effect of dynamic wind, the carbide slag powder is difficult for bonding, stops up in screening plant and the flow process, has ensured operation steady in a long-term; The two-stage dust-precipitator makes power wind outlet dust content be reduced to 30mg/m
3Below, efficiency of dust collection reaches more than 99%.
Description of drawings
Fig. 1 is the structural representation of the utility model;
Fig. 2 is the feed system shown in Figure 1 and the structural representation of drying system;
Fig. 3 is a grinding system and the structural representation that selects powder system shown in Figure 1;
Wherein: 101-charging heap storehouse, 102-airing field, the dried slag muck of 103-storehouse, 104-dreg-inlet hopper, 105-first bucket elevator; 201-rotary kiln baiting storehouse, the 202-rotary kiln, 203-first belt conveyor, 204-adds coal bunker, 205-second bucket elevator, the coal-fired blanking bin of 206-, 207-stove, 208-exhaust pass, 209-bag filter, 210-first air-introduced machine, 211-conveying worm; 301-the 3rd bucket elevator, 302-pre-grinding storehouse, 303-second belt conveyor, 304-ball mill feed hopper, 305-ball mill; 401-ash material riser, 402-powder concentrator, 403-the 3rd belt conveyor, 404-finished product ash bucket elevator; 405-finished product ash storehouse, 406-airduct, 407-cyclone separator, 408-gas tank dust-precipitator; 409-second air-introduced machine, 410-cinder pipeline, 411-the 4th bucket elevator, 412-cinder return duct.
The specific embodiment
As shown in Figure 1, a kind of carbide slag pulverized coal preparation system comprises feed system 10, drying system 20, grinding system 30 and selects powder system 40.
As shown in Figure 2; Feed system 10 comprise airing field 102,102 downstream, airing field in charging heap storehouse 101, charging heap 101 downstream, storehouse dried slag muck storehouse 103, the carbide slag after the airing is sent in the dreg-inlet hopper 104; Dreg-inlet hopper 104 is arranged near the rotary kiln baiting storehouse 201, through first bucket elevator 105 carbide slag after the airing is sent in the rotary kiln baiting storehouse 201.
As shown in Figure 3; Grinding system 30 comprises two pre-grinding storehouses 302 and ball mill 305; Ball mill 305 is provided with ball mill feed hopper 304; Two pre-grinding storehouses 302 are arranged on the exit of first belt conveyor 203, and 302 installation places, pre-grinding storehouse are provided with 302 belows, 301, two pre-grinding storehouses of the 3rd bucket elevator and are provided with second belt conveyor 303; 302 outlet at bottom places, two pre-grinding storehouses are equipped with the port of export of second belt conveyor, 303, the second belt conveyors 303 that pipeline leads to the below and are connected in the ball mill feed hopper 304.
Select powder system 40 to comprise powder concentrator 402 and be positioned at the two-stage dust arrester installation in powder concentrator downstream; Powder concentrator 402 is selected composition dividing powder separating machine for use; Be provided with ash material riser 401 between the top inlet of powder concentrator 402 and the outlet of ball mill 305; Feed back riser 401 is a grey material conveying tube road; Bottom inlet is communicated with the outlet of ball mill 305, and top exit is communicated with powder concentrator 402 inlets, and the carbide slag after grinding is sent into powder concentrator 402; The two-stage dust arrester comprises the cyclone separator 407 and gas tank dust-precipitator 408 that sets gradually; Powder concentrator 402 is provided with an airduct 406 that leads to cyclone separator 407 tops inlet near the right side at outlet at bottom place, be communicated with through pipeline between cyclone separator 407 and the gas tank dust-precipitator 408, the outlet of gas tank dust-precipitator 408 be communicated with through pipeline between second air-introduced machine 409 enters the mouth; Powder concentrator 402, gas tank dust-precipitator 408 and cyclone separator 407 belows are provided with the 3rd belt conveyor 403; Powder concentrator 402, gas tank dust-precipitator 408 and cyclone separator 407 outlet at bottom places are equipped with pipeline and lead to below the 3rd belt conveyor 403, are provided with finished product ash storehouse 405 and finished product ash bucket elevator 404 in the exit of the 3rd belt conveyor 403, and finished product ash bucket elevator 404 will be sent finished product ash storehouse 405 to from the finished product ash of the 3rd belt conveyor 403 ports of export output; Powder concentrator 402 also is provided with a cinder pipeline 410 near the left side at outlet at bottom place; Be provided with the 4th bucket elevator 411 in cinder pipeline 410 exits; The 4th bucket elevator 411 installation places are provided with cinder return duct 412; The outlet of cinder return duct 412 inserts ball mill feed hopper 304, and the cinder slag that comes out from cinder pipeline 410 sends into through the 4th bucket elevator 411 and cinder return duct 412 that ball mill feed hopper 304 is laggard goes into ball mill 305 and continue circulation.
The technological process of the utility model is following:
The carbide slag raw material is deposited in after transporting in the charging heap storehouse 101; The stand is placed on 102 airings of airing field in good time; Finish the back with forklift shovel deliver to deposit in the dried slag muck storehouse 103 subsequent use; After this shovel to dreg-inlet hopper 104 with forklift again; Be promoted to rotary kiln baiting storehouse 201 through first bucket elevator 105, the dried slag of carbide slag gets into rotary kiln 202, coal-fired adding from add coal bunker 204; Be promoted to coal-fired blanking bin 206 backs through second bucket elevator 205 and get into stove 207 burnings; Flue gas contacts with the carbide slag subtend in rotary kiln 202 further and delivers to bag filter 209 through exhaust pass 208 after the oven dry, power by first air-introduced machine 210 provide, bag filter 209 removes the carbide slag soot particle of carrying secretly in the flue gas down and is delivered to rotary kiln baiting storehouse 201 through conveying worm 211 sends into rotary kiln 202 once more; The carbide slag of further drying in the rotary kiln 202 is delivered to the 3rd bucket elevator 301 by first belt conveyor 203; Be promoted to and prepare in the pre-grinding storehouse 302 to grind, the dried slag of carbide slag blanking to the second belt conveyor 303 in the pre-grinding storehouse 302 is delivered to ball mill feed hopper 304 through second belt conveyor 303; The cinder return duct 412 same ball mill feed hoppers 304 that insert; Carbide slag is promoted to powder concentrator 402 through ash material riser 401 after ball mill 305 grinds, power is provided by second air-introduced machine 409, and powder concentrator 402 carries out the ash material soot particle vertical drop to the three belt conveyors 403 of qualified particle diameter behind the sizing screening; And the bigger soot particle of particle diameter gets into the 4th bucket elevator 411 from cinder pipeline 410; Send into recirculation in the ball mill feed hopper 304 through cinder return duct 412, the less soot particle of particle diameter together gets into cyclone separator 407 initial gross separations through airduct 406 with power wind, and carries out dedusting once more through gas tank dust-precipitator 408 and separate; Used power wind is provided by second air-introduced machine 409, and the qualified particle diameter ash material under powder concentrator 402 choosings, the ash material that cyclone dust collectors 407 separate, gas tank dust-precipitator 408 collected ash material together are delivered to finished product ash bucket elevator 404 down to the 3rd belt conveyor 403 and are promoted to finished product ash storehouse 405.
Embodiment 1
Somewhere carbide slag aboundresources; The carbide slag price is at 30～50 yuan/ton; Stable raw material sources are arranged, and between 150～300 yuan/ton, the lime price is at 400～600 yuan/ton according to quality discrepancy for the lime stone price; The coal-burning power plant is more in having an area of 300 kilometers, and 90% adopts sulfur removal technologies such as limestone-gypsum wet method, carbide slag-gypsum wet, calcium hydroxide semidry method.
The calcium carbide ground-slag prepares 5,000,000 yuan of project investments, total installation of generating capacity 300Kw, and 80,000 tons of annual productions, 2,000,000 yuan of operating costs, 150～200 yuan/ton of finished product calcium carbide ground-slag prices are brought surplus the economic benefit 500 ten thousand yuan every year.
Embodiment 2
The system that certain carbide slag mill house adopts the utility model patent to be provided, its carbide slag charging Q factor is: moisture content-32%, Ca (OH)
2-85% (butt), CaCO
3-11% (butt), impurity (reducing substanceses such as sulfur-bearing, phosphorus)-4%, COD-9.3mg/g (butt); Directly apply in this carbide slag desulphurization system; Per hour carbide slag (wet basis) consumption is 12t, and the desulphurization system gypsum purity is 89.5%, and inferior sulfate radical content is 6%; The former water COD of desulfurization wastewater is 800mg/L, relies on aeration to handle and can reach 300mg/L.
When handling this carbide slag, kiln temperature is controlled at 850～900 ℃, and powder concentrator is sent into the ball mill circular grinding with particle diameter greater than 325 purpose powders again, and the carbide slag powder composition of finally handling out is: moisture content-0%, Ca (OH)
2-31.6%, CaCO
3-1.5%, impurity (reducing substanceses such as sulfur-bearing, phosphorus)-2.3%, CaO-64.5%, COD-1.5mg/g.The desulphurization system of using the calcium carbide ground-slag after handling per hour carbide slag consumption is 7t; The desulfurated plaster purity of processing is 97.2%; Inferior sulfate radical content is 0, and the former water COD of desulfurization wastewater drops to 280～300mg/L, relies on aeration to handle and can reach national water quality first discharge standard.
GBT5484-2000 is adopted in the detection of carbide slag meal component; Desulfurization wastewater COD value adopts GB/T11914-1989.
Claims (7)
1. carbide slag pulverized coal preparation system; Comprise drying system (20); Grinding system (30) and select powder system (40) is characterized in that, described drying system (20) comprises rotary kiln (202), stove (207), first air-introduced machine (210) and rotary kiln baiting storehouse (201); Described rotary kiln (202) one sides are communicated with stove (207), and opposite side is communicated with first air-introduced machine (210) and rotary kiln baiting storehouse (201); Described grinding system (30) comprises pre-grinding storehouse (302) that is communicated with rotary kiln (202) outlet and the ball mill (305) that is communicated with pre-grinding storehouse (302) outlet; The described powder system (40) that selects comprises the powder concentrator (402) that is communicated with ball mill (305) outlet; Described rotary kiln baiting storehouse (201), stove (207) and installation place, pre-grinding storehouse (302) are equipped with bucket elevator.
2. carbide slag pulverized coal preparation system according to claim 1; It is characterized in that; The described powder system (40) that selects also comprises the two-stage dust arrester installation that is positioned at powder concentrator (402) downstream; Described two-stage dust arrester installation comprises cyclone separator (407) and the gas tank dust-precipitator (408) that connects successively, and the outlet of said gas tank dust-precipitator (408) is communicated with the inlet of second air-introduced machine (409).
3. carbide slag pulverized coal preparation system according to claim 2 is characterized in that, described powder concentrator (402) and two-stage dust arrester installation below are provided with the 3rd belt conveyor (403), and the outlet of said the 3rd belt conveyor (403) connects finished product ash storehouse (405).
4. carbide slag pulverized coal preparation system according to claim 3 is characterized in that, is provided with cinder return duct (412) between described powder concentrator (402) and the ball mill (305).
5. carbide slag pulverized coal preparation system according to claim 1; It is characterized in that; Described drying system (20) also comprises the bag filter (209) that is arranged between rotary kiln (202) and first air-introduced machine (210), and described bag filter (209) inlet is communicated with rotary kiln (202), outlet and is communicated with first air-introduced machine (210), conveying worm (211) that the bottom is provided with to be communicated with rotary kiln baiting storehouse (201).
6. carbide slag pulverized coal preparation system according to claim 1; It is characterized in that; Be provided with two pre-grinding storehouses (302) in the described grinding system (30); Outlet below, described pre-grinding storehouse (302) is provided with second belt conveyor (303), and described second belt conveyor (303) outlet is communicated with ball mill (305) inlet.
7. carbide slag pulverized coal preparation system according to claim 1; It is characterized in that; Described drying system (20) upper reaches also are provided with feed system (10), and said feed system (10) comprises charging heap storehouse (101), the airing field (102) in charging heap downstream, storehouse (101), the dried slag muck storehouse (103) in downstream, airing field (102).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201120550852XU CN202427332U (en) | 2011-12-26 | 2011-12-26 | Carbide slag powder-making system |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201120550852XU CN202427332U (en) | 2011-12-26 | 2011-12-26 | Carbide slag powder-making system |
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| CN202427332U true CN202427332U (en) | 2012-09-12 |
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ID=46776809
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| CN201120550852XU Expired - Fee Related CN202427332U (en) | 2011-12-26 | 2011-12-26 | Carbide slag powder-making system |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102512919A (en) * | 2011-12-26 | 2012-06-27 | 浙江天蓝环保技术股份有限公司 | Carbide slag powdering process and system |
| CN109127106A (en) * | 2018-08-09 | 2019-01-04 | 天津中科福源科技有限责任公司 | A kind of conch meal grinding device |
-
2011
- 2011-12-26 CN CN201120550852XU patent/CN202427332U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102512919A (en) * | 2011-12-26 | 2012-06-27 | 浙江天蓝环保技术股份有限公司 | Carbide slag powdering process and system |
| CN102512919B (en) * | 2011-12-26 | 2014-04-23 | 浙江天蓝环保技术股份有限公司 | Carbide slag powdering process and system |
| CN109127106A (en) * | 2018-08-09 | 2019-01-04 | 天津中科福源科技有限责任公司 | A kind of conch meal grinding device |
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