CN102128449A - Double spouted bed slag cooler and air return system matched with same - Google Patents
Double spouted bed slag cooler and air return system matched with same Download PDFInfo
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- CN102128449A CN102128449A CN 201110100031 CN201110100031A CN102128449A CN 102128449 A CN102128449 A CN 102128449A CN 201110100031 CN201110100031 CN 201110100031 CN 201110100031 A CN201110100031 A CN 201110100031A CN 102128449 A CN102128449 A CN 102128449A
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Abstract
The invention relates to a double spouted bed slag cooler and an air return system matched with the same, which belong to the technical field of circulating fluidized bed boilers and are suitable for cooling bottom slag in a circulating fluidized bed boiler and treating hot air discharged by the slag cooler. The double spouted bed slag cooler comprises a sorting bin, a water cooling bin and an air-solid separation bin, wherein the sorting bin and the water cooling bin have a spouted bed structure; and an air-solid separation device is arranged in the air-solid separation bin. The air return system matched with the double spouted bed slag cooler comprises an air return pipe, a constant-pressure air return bellows and a spray nozzle, wherein one end of the air return pipe is connected with the air-solid separation bin, and the other end of the air return pipe is connected with the constant-pressure air return bellows; and the constant-pressure air return bellows is connected with a tail flue through the spray nozzle. The fluidity of the bottom slag in the double spouted bed slag cooler is ensured, the hot air discharged by the slag cooler can be effectively recycled in the tail flue, and the requirement of cooling the bottom slag in the circulating fluidized bed boiler can be met.
Description
Technical field
The invention belongs to the subsidiary engine equipment of CFBB, particularly a kind of end slag cooler of CFBB and supporting with it air return system are applicable to the cooling of slag at the bottom of the CFBB and the processing of slag cooler institute heat extraction air.
Background technology
Slag cooler is the key equipment of slag treatment system at the bottom of the CFBB, is used for the selective discharge and the cooling of boiler bottom slag, and the ruuning situation of slag cooler is directly connected to the continuous safety and economic operation of CFBB.Fluidized bed slag cooler relies on its heat transfer coefficient height, handle the quantity of slag big, can realize advantages such as selective discharge to the boiler bottom slag, obtained extensive use at home and abroad.The composite type cold slag device (patent No. ZL200710092413.7) of University Of Chongqing's research and development, in composite type cold slag device, realize directed flow and multiple spot deslagging by guiding end slag, efficiently solve the problems such as buried pipe abrasion, coking and obstruction that traditional fluidized bed slag cooler exists, can satisfy the needs of the continuous safety and economic operation of unit.But, make the big slag delivery pipe of accident have the operational reliability problem because composite type cold slag device has adopted the multiple spot deslagging mode of the big slag delivery pipe of accident (auxiliary slag-drip opening) that too much depends on intermittent operation in the water-cooled storehouse.The hot-air that composite type cold slag device is discharged is to send burner hearth back to by the return air inlet of offering specially on boiler furnace, and use as the part of secondary wind.But this portion of hot air because rigidity is not enough, is not enough to replace the secondary wind of equivalent when using as the part of secondary wind, and promptly this portion of hot air can not play the secondary wind action fully.Be not provided with for the CFBB of return air inlet at boiler furnace for some, the hot-air that slag cooler is discharged can not be sent back to burner hearth with the form of secondary wind, thereby makes this portion of hot air can't obtain effective recycling.
Summary of the invention
The objective of the invention is to overcome above-mentioned the deficiencies in the prior art, a kind of two spray bed type slag coolers and supporting with it air return system are provided.Solve the operational reliability problem of the big slag delivery pipe of accident that original composite type cold slag device brings because of multiple spot deslagging mode; Overcome the problem of hot-air rigidity deficiency of existence when using of slag cooler discharge as the part of secondary wind; Can not be sent back to burner hearth when being recycled with the form of secondary wind at this portion of hot air, be guaranteed that this portion of hot air can be able to effective recycling at back-end ductwork; And can effectively improve exerting oneself and the cooling effectiveness of slag of the red-hot end of two spray bed type slag coolers.
Two spray bed type slag cooler of the present invention comprises slag cooler main body, slag feed pipe, sorting bin, first dividing wall, water-cooled storehouse, water-cooled tube bank, separation bin partition wall, separates inlet flue duct, backwind tube, gas-solid separating device, gas solid separation storehouse, separating slag pipe, main scum pipe, porous plate formula air distribution plate, blast cap formula air distribution plate, big slag delivery pipe, sorting bin partition wall, water-cooled storehouse partition wall etc.The slag cooler main body is separated into 3 bins by first dividing wall and separation bin partition wall, is respectively sorting bin, water-cooled storehouse and gas-solid separation bin, and wherein, sorting bin and top, water-cooled storehouse communicate, and the separation bin partition wall separates gas solid separation storehouse and water-cooled storehouse.Sorting bin is spouted bed structure, and the sorting bin bottom centre position is furnished with porous plate formula air distribution plate; Slag feed pipe is installed in the sorting bin end face, and communicates with sorting bin, and the porous plate formula air distribution plate of sorting bin is provided with big slag delivery pipe; The porous plate formula air distribution plate of sorting bin than near big slag delivery pipe one side height, is followed successively by straight mouthful of accelerating sections and flared section near slag feed pipe one side for being in tilted layout above the porous plate formula air distribution plate of sorting bin.The water-cooled storehouse is spouted bed structure, the blast cap formula air distribution plate of bottom, water-cooled storehouse for being in tilted layout, and incline direction is consistent with the incline direction of porous plate formula air distribution plate in the sorting bin; Low side at blast cap formula air distribution plate is provided with main scum pipe, and the blast cap formula air distribution plate top in water-cooled storehouse is followed successively by straight mouthful of accelerating sections and flared section; Be furnished with the water-cooled tube bank in the water-cooled storehouse.Gas solid separation is provided with gas-solid separating device in the storehouse, the structure of gas-solid separating device can be cyclone separator, centicell unit or other dry type gas-solid separating device, backwind tube is installed in top, gas solid separation storehouse, and communicate with the gas solid separation storehouse, bottom, gas solid separation storehouse is provided with the separating slag pipe, and separation bin partition wall top offers the separation inlet flue duct.On big slag delivery pipe and main scum pipe, all be disposed with accident scum pipe and rotary slagging coutrol valve; Sorting bin and below, water-cooled storehouse all are provided with independently air compartment.
The air return system that of the present invention and two spray bed type slag coolers match is by backwind tube, and isobaric return air bellows (the isobaric return air bellows of isobaric return air bellows of notch cuttype or isobaric air compartment type) and shower nozzle are formed.Wherein, an end of backwind tube is arranged on the top, gas solid separation storehouse of two spray bed type slag coolers, and communicates with the gas solid separation storehouse, and the other end of backwind tube then links to each other with isobaric return air bellows.Isobaric return air bellows link to each other with back-end ductwork through shower nozzle again.
Two spray bed type slag coolers and supporting with it air return system involved in the present invention have overcome the deficiencies in the prior art.Solved the operational reliability problem of the big slag delivery pipe of accident that original composite type cold slag device brings because of multiple spot deslagging mode; Overcome the problem of hot-air rigidity deficiency of existence when using of slag cooler discharge as the part of secondary wind; When the hot-air of slag cooler discharge can not be recycled with the form of secondary wind, guaranteed that this portion of hot air can be able to effective recycling at back-end ductwork; And effectively improved exerting oneself and the cooling effectiveness of slag of the red-hot end of two spray bed type slag coolers.
Description of drawings
Fig. 1 is the general structure schematic diagram of the embodiment of the invention 1 described two spray bed type slag coolers;
Fig. 2 is the A-A cutaway view of Fig. 1;
Fig. 3 is the B-B cutaway view of Fig. 1;
Fig. 4 is the C-C cutaway view of Fig. 1;
Fig. 5 is the D-D cutaway view of Fig. 1;
Fig. 6 is the general structure schematic diagram of the embodiment of the invention 2 described two spray bed type slag coolers;
Fig. 7 is the E-E cutaway view of Fig. 6;
Fig. 8 is the F-F cutaway view of Fig. 6;
Fig. 9 is the G-G cutaway view of Fig. 6;
Figure 10 is the H-H cutaway view of Fig. 6;
Figure 11 is the I-I cutaway view of Fig. 6;
Figure 12 is the general structure schematic diagram of the embodiment of the invention 3 described two spray bed type slag coolers;
Figure 13 is the schematic diagram of air return system of the present invention;
Figure 14 is the cutaway view of the isobaric return air bellows of notch cuttype among Figure 12;
Figure 15 is the cutaway view of the isobaric return air bellows of isobaric air compartment type among Figure 12.
In the above-mentioned accompanying drawing, 1 slag feed pipe, 2 sorting bins, 2-1 first sorting bin, 2-2 second sorting bin, 3 first dividing walls, 4 water-cooled storehouses, the 4-1 first water-cooled storehouse, the 4-2 second water-cooled storehouse, the tube bank of 5 water-cooleds, 6 separation bin partition walls, 7 separate inlet flue duct, 8 backwind tubes, 9 gas-solid separating devices, 10 gas solid separation storehouses, 11 separating slag pipes, 12 blast caps, 13 blast cap formula air distribution plates, 14 rotary slagging coutrol valves, 15 main scum pipes, 16 accident scum pipes, 17 big slag delivery pipes, 18 air compartments, 19 porous plate formula air distribution plates, 20 straight mouthfuls of accelerating sections, 21 flared section, 22 slag cooler main bodys, 23 cooling water inlet headers, 24 coolant outlet headers, 25 sorting bin partition walls, 26 water-cooled storehouse partition walls, 27 back-end ductworks, 28 economizers, 29 isobaric return air bellows, the isobaric return air bellows of 29-1 notch cuttype, the isobaric return air bellows of the isobaric air compartment type of 29-2,30 air preheaters, 31 shower nozzles.
The specific embodiment
The invention will be further described below in conjunction with Figure of description and embodiment.
A kind of two spray bed type slag coolers of present embodiment such as Fig. 1 are to shown in Figure 5, wherein slag cooler main body 22 internal placement have first dividing wall 3 and separation bin partition wall 6, and slag cooler main body 22 is divided into three bins, be respectively sorting bin 2, water-cooled storehouse 4 and gas-solid separation bin 10.Wherein, sorting bin 2 and 4 tops, water-cooled storehouse communicate, and separation bin partition wall 6 separates gas solid separation storehouse 10 and water-cooled storehouse 4; Sorting bin 2 and 4 belows, water-cooled storehouse all are provided with independently air compartment 18.Sorting bin 2 is spouted bed structure, and sorting bin 2 bottom centre positions are furnished with porous plate formula air distribution plate 19, and porous plate formula air distribution plate 19 tops of sorting bin 2 are disposed with straight mouthful of accelerating sections 20 and flared section 21; Slag feed pipe 1 is installed in sorting bin 2 end faces, and communicates with sorting bin 2, and the porous plate formula air distribution plate 19 of sorting bin 2 is provided with big slag delivery pipe 17; The porous plate formula air distribution plate 19 of sorting bin 2 is for being in tilted layout, near the close big slag delivery pipe 17 1 side height of slag feed pipe 1 one sides ratio.Water-cooled storehouse 4 is spouted bed structure, 4 bottoms, water-cooled storehouse are the blast cap formula air distribution plate 13 that is in tilted layout, and incline direction is consistent with the incline direction of porous plate formula air distribution plate 19 in the sorting bin 2, blast cap formula air distribution plate 13 tops in water-cooled storehouse 4 are disposed with straight mouthful of accelerating sections 20 and flared section 21, blast cap formula air distribution plate 13 low sides in water-cooled storehouse 4 are provided with main scum pipe 15, and the highest point of the blast cap formula air distribution plate 13 in water-cooled storehouse 4 is than the low 200mm of highest point of the porous plate formula air distribution plate 19 of sorting bin 2; Be furnished with water-cooled tube bank 5 in the water-cooled storehouse 4, cooling water inlet header 23 and coolant outlet header 24 link with the import and the outlet of water-cooled tube bank 5 respectively.Be provided with gas-solid separating device 9 in the gas solid separation storehouse 10, gas-solid separating device 9 is made of side by side two cyclone separators, 10 tops, gas solid separation storehouse are provided with backwind tube 8, and 10 bottoms, gas solid separation storehouse are provided with separating slag pipe 11, and separation bin partition wall 6 tops offer separates inlet flue duct 7.On main scum pipe 15 and big slag delivery pipe 17, all be disposed with accident scum pipe 16 and rotary slagging coutrol valve 14.
A kind of two spray bed type slag coolers of present embodiment such as Fig. 6 are to shown in Figure 11, and wherein first dividing wall 3 and separation bin partition wall 6 are divided into sorting bin 2 (comprising the first sorting bin 2-1 and the second sorting bin 2-2), water-cooled storehouse 4 (comprising the first water-cooled storehouse 4-1 and the second water-cooled storehouse 4-2) and gas-solid separation bin 10 with slag cooler main body 22; Sorting bin 2 equals water-cooled storehouse 4 and the length sum of gas solid separation storehouse 10 on this direction in the length on the arranged direction of first dividing wall 3; Sorting bin 2 bottoms are the porous plate formula air distribution plate 19 that is in tilted layout, and 4 bottoms, water-cooled storehouse are the blast cap formula air distribution plate 13 that is in tilted layout, and the highest point of the blast cap formula air distribution plate 13 in water-cooled storehouse 4 is than the low 400mm of highest point of the porous plate formula air distribution plate 19 of sorting bin 2; Sorting bin partition wall 25 is divided into the first sorting bin 2-1 and the second sorting bin 2-2 with sorting bin 2, and guarantees that the first sorting bin 2-1 and the second sorting bin 2-2 bottom are communicated with; Water-cooled storehouse partition wall 26 is divided into the first water-cooled storehouse 4-1 and the second water-cooled storehouse 4-2 with water-cooled storehouse 4, and guarantees that the first water-cooled storehouse 4-1 and 4-2 bottom, the second water-cooled storehouse are communicated with.Slag feed pipe 1 is installed in the first sorting bin 2-1 end face, and communicates with the first sorting bin 2-1, and the blast cap formula air distribution plate 13 that the porous plate formula air distribution plate 19 of the second sorting bin 2-2 is provided with big slag delivery pipe 17, the second water-cooled storehouse 4-2 is provided with main scum pipe 15.The top of the separation bin partition wall 6 between the second water-cooled storehouse 4-2 and gas solid separation storehouse 10 offers the separation bin partition wall 6 that separates between inlet flue duct 7, the second sorting bin 2-2 and the gas solid separation storehouse 10 the second sorting bin 2-2 and gas-solid separation bin 10 is separated fully.Described two all the other structures of spray bed type slag cooler of present embodiment are identical with embodiment 1.
The a kind of two of present embodiment are sprayed the bed type slag coolers as shown in figure 12, and wherein first dividing wall 3 and separation bin partition wall 6 are divided into sorting bin 2 (comprising the first sorting bin 2-1 and the second sorting bin 2-2), water-cooled storehouse 4 (comprising the first water-cooled storehouse 4-1 and the second water-cooled storehouse 4-2) and gas-solid separation bin 10 with slag cooler main body 22; Sorting bin 2 equals the length of water-cooled storehouse 4 in this direction in the length on the arranged direction of first dividing wall 3.Described two all the other structures of spray bed type slag cooler of present embodiment are identical with embodiment 2.
Air return system such as Fig. 1, Figure 13 and shown in Figure 14 that a kind of and two spray bed type slag coolers of present embodiment match, wherein, one end of backwind tube 8 is arranged on 10 tops, gas solid separation storehouse of two spray bed type slag coolers, and communicate with gas solid separation storehouse 10, the other end of backwind tube 8 then links to each other with the isobaric return air bellows of notch cuttype 29-1, and the isobaric return air bellows of notch cuttype 29-1 links to each other with back-end ductwork 27 between economizer 28 and the air preheater 30 by organizing the identical shower nozzle 31 of structures again.The horizontal cross sectional geometry of the isobaric return air bellows of notch cuttype 29-1 is a stairstepping, count from the inlet side of the isobaric return air bellows of notch cuttype 29-1 be followed successively by first, second ..., N level ladder, first, second ..., N level ladder the area of air intake surface than for n: (n-1): ...: 1.
Air return system such as Fig. 1, Figure 13 and shown in Figure 15 that a kind of and two spray bed type slag coolers of present embodiment match, wherein, one end of backwind tube 8 is arranged on 10 tops, gas solid separation storehouse of two spray bed type slag coolers, and communicate with gas solid separation storehouse 10, the other end of backwind tube 8 then links to each other with the isobaric return air bellows of isobaric air compartment type 29-2, and the isobaric return air bellows of isobaric air compartment type 29-2 links to each other with back-end ductwork 27 between economizer 28 and the air preheater 30 by organizing the identical shower nozzle 31 of structures again.
Below in conjunction with embodiment 1, embodiment 4 and Figure of description the operation principle of the present invention and the course of work are described further.
The operation principle of the present invention and the course of work are as follows: at first, slag enters sorting bin 2 by slag feed pipe 1 at the bottom of the high temperature that boiler is discharged, and cold wind then enters sorting bin 2 by the porous plate formula air distribution plate 19 that is arranged in sorting bin 2 bottoms.The end slag that enters sorting bin 2 is under the effect of described cold wind, and cold wind direct on the one hand and that temperature is lower carries out heat exchange and lowers the temperature; Then realized sorting on the other hand, when guaranteeing that the thick slag of the overwhelming majority is stayed in the sorting bin 2, made thin slag cross first dividing wall 3 and enter water-cooled storehouse 4 by the impelling effect to thick slag, thin slag in the end slag.For the sorting bin 2 of spouted bed structure, at the bottom of handling this wide-size distribution that comprises thick slag during slag, rely on the high velocity air in the straight mouthful accelerating sections 20 in bottom, add the synergy of the porous plate formula air distribution plate 19 that is in tilted layout, when guaranteeing thick slag cooling effect, avoided thick slag transfixion and stop up sorting bin 2.Cooled thick slag enters big slag delivery pipe 17 and is discharged by 14 controls of rotary slagging coutrol valve.For the water-cooled storehouse 4 of spouted bed structure, cold wind enters water-cooled storehouse 4 by the blast cap formula air distribution plate 13 that is arranged in 4 bottoms, water-cooled storehouse.The end slag that enters water-cooled storehouse 4 from sorting bin 2 is cooled to 100～150 ℃ under the acting in conjunction of described cold wind and water-cooled tube bank 5, the main scum pipe 15 through being arranged in 4 bottoms, water-cooled storehouse is discharged by 14 controls of rotary slagging coutrol valve again.For the end slag that enters water-cooled storehouse 4, rely on the high velocity airs in the straight mouthful of accelerating sections 20 in 4 bottoms, water-cooled storehouse to guarantee the flowability of end slag water-cooled storehouse 4 in equally, avoid entering water-cooled storehouse 4 interior end slag transfixions and stopped up water-cooled storehouse 4.Temperature higher and hot-air that carry the parts of fine slag in heat absorption back enters gas solid separation storehouse 10 through separating inlet flue duct 7, the gas-solid separating device 9 thin slag that hot-air is entrained is separated from hot-air, this parts of fine slag enters follow-up defeated slag device by the separating slag pipe 11 of 10 bottoms, gas solid separation storehouse, hot-air after gas-solid separating device 9 is handled then draws the back-end ductwork of delivering between economizer 28 and the air preheater 30 27 by backwind tube 8 through the isobaric return air bellows of notch cuttype 29-1 equably, has guaranteed that the hot-air that two spray bed type slag coolers are discharged can be able to effective recycling at back-end ductwork 27.
Compared with prior art, the present invention has following characteristics: the sorting bin 2 and the water-cooled storehouse 4 of (1) two spray bed type slag cooler are spouted bed structure.Two spray bed type slag coolers rely on the high velocity air in sorting bin 2 and the straight mouthful accelerating sections 20 of water-cooled storehouse 4 inner bottom parts, guaranteed the flowability of end slag in two spray bed type slag coolers, fundamentally avoided traditional fluidized bed slag cooler because of problems such as the not good stifled slag that causes of end slag flowability, cokings; Meanwhile, because end slag has good flowability in two spray bed type slag coolers, therefore need not to be provided with the big slag delivery pipe of accident, and then also solved original composite type cold slag device in running, the operational reliability problem of the big slag delivery pipe of accident that brings because of multiple spot deslagging mode.(2) be provided with gas-solid separating device 9 in two spray bed type slag coolers, the thin slag that makes two spray bed type slag coolers carry secretly in its heat extraction air is separated, and then effectively reduce under the prerequisite of solid concentration in the hot-air and backwind tube 8 wearing and tearing, size by reducing to be arranged on the backwind tube between boiler furnace and the two spray bed type slag cooler and the wind speed when improving hot-air and returning burner hearth, effectively improved the rigidity of hot-air, and then made this portion of hot air can really play the secondary wind action.(3) return air inlet is not set and then the hot-air that two spray bed type slag coolers can not be discharged is sent burner hearth back to when being recycled with the form of secondary wind at boiler furnace, the hot-air that in gas solid separation storehouse 10, handle through gas-solid separating device 9, cause back-end ductwork 27 between economizer 28 and the air preheater 30 equably by the air return system that matches with two spray bed type slag coolers, guaranteed that the hot-air that two spray bed type slag coolers are discharged can be able to effective recycling at back-end ductwork 27.Because hot-air is after gas solid separation is handled, its dust content is lower than the dust content of boiler smoke, adding hot-air is to draw equably by isobaric return air bellows 29 to deliver to back-end ductwork 27, and the quantity of hot air that two spray bed type slag coolers are discharged is far below the boiler smoke amount, thereby neither can cause and the wear problem of back-end ductwork 27 also can not cause appreciable impact back-end ductwork 27 original flue gas flow fields.(4) for two spray bed type slag coolers, the end slag that between burner hearth and two spray bed type slag cooler, does not circulate, and then effectively improved exerting oneself and the cooling effectiveness of slag of the red-hot end of two spray bed type slag coolers, and reduced the wearing and tearing of backwind tube 8.
Claims (3)
1. one kind pair sprays the bed type slag cooler, comprise slag cooler main body (22), first dividing wall (3), separation bin partition wall (6), sorting bin (2), water-cooled storehouse (4), gas solid separation storehouse (10), porous plate formula air distribution plate (19), blast cap formula air distribution plate (13), separating slag pipe (11), gas-solid separating device (9), separate inlet flue duct (7), backwind tube (8), wherein, slag cooler main body (22) is separated into 3 bins by first dividing wall (3) and separation bin partition wall (6), be respectively sorting bin (2), water-cooled storehouse (4) and gas-solid separation bin (10), sorting bin (2) is spouted bed structure, sorting bin (2) bottom angled is furnished with porous plate formula air distribution plate (19), water-cooled storehouse (4) bottom angled is furnished with blast cap formula air distribution plate (13), sorting bin (2) and top, water-cooled storehouse (4) communicate, separation bin partition wall (6) separates gas solid separation storehouse (10) and water-cooled storehouse (4), it is characterized in that: water-cooled storehouse (4) are spouted bed structure, the highest point of the blast cap formula air distribution plate (13) in water-cooled storehouse (4) is than the low 200～400mm of highest point of the porous plate formula air distribution plate (19) of sorting bin (2), the top of the separation bin partition wall (6) between water-cooled storehouse (4) and gas solid separation storehouse (10) offers separates inlet flue duct (7), be provided with gas-solid separating device (9) in the gas solid separation storehouse (10), gas-solid separating device (9) is made of side by side two or more cyclone separators, top, gas solid separation storehouse (10) is provided with backwind tube (8), and gas solid separation storehouse (10) bottom is provided with separating slag pipe (11).
2. with the described two air return systems that the bed type slag coolers match that spray of claim 1, comprise backwind tube (8), isobaric return air bellows (29) and shower nozzle (31), wherein, one end of backwind tube (8) is arranged on the top, gas solid separation storehouse (10) of two spray bed type slag coolers, and communicate with gas solid separation storehouse (10), it is characterized in that: the other end of backwind tube (8) links to each other with isobaric return air bellows (29), and isobaric return air bellows (29) link to each other with back-end ductwork (27) between economizer (28) and the air preheater (30) by the identical shower nozzle (31) of many group structures again.
3. air return system according to claim 2, it is characterized in that: isobaric return air bellows (29) are the isobaric return air bellows (29-1) of notch cuttype, the horizontal cross sectional geometry of the isobaric return air bellows of notch cuttype (29-1) is a stairstepping, count from the inlet side of the isobaric return air bellows of notch cuttype (29-1) be followed successively by first, second ..., N level ladder,, second ..., N level ladder the area of air intake surface than for n: (n-1): ...: 1.
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| CN2011101000310A CN102128449B (en) | 2011-04-20 | 2011-04-20 | Double spouted bed slag cooler and air return system matched with same |
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| CN2011101000310A CN102128449B (en) | 2011-04-20 | 2011-04-20 | Double spouted bed slag cooler and air return system matched with same |
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| CN102128449B CN102128449B (en) | 2012-11-28 |
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| CN104451006A (en) * | 2014-12-11 | 2015-03-25 | 山东钢铁股份有限公司 | Pea coal pulverizing system and pea coal pulverizing method |
| CN114229481A (en) * | 2022-02-23 | 2022-03-25 | 中国恩菲工程技术有限公司 | Cooling type high-temperature granule conveying device |
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| CN102128449B (en) | 2012-11-28 |
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