CN107576190B - A kind of tower drier that waste heat from tail gas recycles - Google Patents

A kind of tower drier that waste heat from tail gas recycles Download PDF

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Publication number
CN107576190B
CN107576190B CN201710637359.3A CN201710637359A CN107576190B CN 107576190 B CN107576190 B CN 107576190B CN 201710637359 A CN201710637359 A CN 201710637359A CN 107576190 B CN107576190 B CN 107576190B
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China
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dispenser
cylinder
flue
raw coal
tower
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CN201710637359.3A
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Chinese (zh)
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CN107576190A (en
Inventor
张雪粉
巩晓然
武常生
崔闻天
李振合
杨利芬
李海山
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新兴能源装备股份有限公司
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Publication of CN107576190A publication Critical patent/CN107576190A/en
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    • YGENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02PCLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
    • Y02P10/00Technologies related to metal processing
    • Y02P10/25Process efficiency

Abstract

The invention discloses a kind of suitable for using coal dust as the raw coal tower drier of the energy.High-temperature tail gas flue is passed through from dryer center, and flue top is equipped with the rotary fluid of expansion joint and no less than two layers.Dryer outer wall is coated with insulating layer, and arrangement is by conical dispenser I and dispenser II between outer cylinder and flue, so that raw coal is turned back flowing at " it " word, reinforcing drying effect.Have expansion chamber in the design of outer cylinder inside top, for settling dust, mitigate the operating pressure of deduster, annular bellows are located at outer cylinder lower part, are connected to wind tower, be evenly arranged blast cap in wind tower, guarantee hot wind even into.There is ventilation hole on dispenser, reinforce the drying of raw coal and reduces system interior air-flow resistance.The upper end of dispenser is equipped with injection tube, prevents accumulation of the raw coal on dispenser.This tower drier takes full advantage of waste heat from tail gas, has saved the energy, enhances drying effect, accomplishes making full use of for waste heat, reduces raw coal and dries energy consumption.

Description

A kind of tower drier that waste heat from tail gas recycles

Technical field

The present invention is applied to the industrial furnace system equipment of the industries such as mine, metallurgy, building materials, is related to a kind of high using stove The tower drier of warm tail gas waste heat drying raw coal is particularly suitable for the industrial furnace for using coal dust as the energy.

Background technique

The industrial furnace of the industries such as mine, metallurgy, building materials is production necessary equipment, these stoves usually consider in design The heat recovery and comprehensive utilization of high-temperature tail gas.Attached drawing 1 is to use coal dust for a kind of equipment letter of Limestone rotary kiln of the energy Figure, including rotary kiln, preheater, cooler, burner, flue, deduster, air blower and chimney.Rotary kiln exists lime stone Calcining is lime under high temperature, and coal dust is blowed into rotary kiln and provides high-temperature calcination thermal energy by burner, cooler by high-temperature lime with Combustion air carries out heat exchange, and lime finished product is cooled down, and combustion air is preheated, so that the combustion-supporting efficiency of air is improved, Preheater is toasted preheating to kiln lime stone is entered using high-temperature tail gas in advance, and high-temperature tail gas cools.Under normal circumstances, from Preheater come out about 200-300 DEG C of exhaust temperature, after cooling, pump into deduster dedusting, then through air blower into chimney Discharge release.

The high-temperature tail gas come out from preheater is needed to take and be arranged for the job requirement (general≤200 DEG C) for meeting deduster It applies and radiating and cooling is carried out to high-temperature tail gas, common measure is to blow air cooling-down into pipeline using mechanical air cooler.It is this The type of cooling wastes waste heat, also increase power consumption.

Raw coal as calcined by rotary kiln fuel is influenced by market condition, and water content is often higher, is reached as high as sometimes To 20% or more, the production efficiency that processing coal dust is ground by raw coal is seriously affected.For the demand for fuel for meeting calcined by rotary kiln, lead to It often needs to be separately provided dryer or hot-blast stove and drying and processing is carried out to raw coal, then ground, so that it is raw to increase coal dust The device is complicated the degree of production, increases occupied area and energy consumption.

Summary of the invention

Technical problem solved by the present invention is providing a kind of tower drier that waste heat from tail gas recycles, tail gas is utilized Waste heat dries raw coal, reduces raw coal and dries energy consumption.

The technical solution adopted by the present invention is that: the tower drier includes outer cylinder, insulating layer, flue, conical dispenser I With dispenser II.Insulating layer is coated with outside outer cylinder, to reduce heat dissipation, flue is passed through from the center of outer cylinder, in outer cylinder and cigarette Arrangement is by conical dispenser I and conical dispenser II between road so that raw coal is turned back flowing at " it " word, increase raw material and The heat exchange area and heat-exchange time of hot wind strengthen drying effect.There is expansion chamber in the design of outer cylinder inside top, is used to fallout Dirt mitigates the operating pressure of deduster, is equipped with annular bellows in outer cylinder lower outside, the wind tower in annular bellows and outer cylinder connects It is logical.Wind tower includes ventilation ring beam, blast cap, communicating pipe and support plate, is connected to annular bellows and ventilation ring beam communicating pipe;Support plate weldering Cigarette receiving road and ventilation ring beam in succession, play fixed venting ring beam action.There is ventilating duct, the uniform cloth of these blast caps inside blast cap It sets on ventilation ring beam, meets the requirement for being uniformly sent into hot wind.

Further, the top of flue is equipped with expansion joint, guarantees the general safety of dryer, is equipped with no less than on flue Two layers of rotary fluid, with enhanced heat transfer effect.To prevent flue inner exhaust gas from laminar flow occur, it is straight that the spacing of adjacent rotary fluid is less than flue 5 times of diameter.

Further, it is designed with ventilation hole on dispenser I and dispenser II, hot wind is passed through from ventilation hole, reinforces raw coal Drying.Injection tube is installed in the upper end of dispenser, prevents accumulation of the raw coal on dispenser.

Further, peep hole and platform are installed, peep hole is removable, convenient for observation, cleaning and inspection operation on outer cylinder.

The technological progress achieved by the present invention is: flue is arranged in the middle part of tower drier, by material drying and dust tail gas It separates, prevents the pollution of material, coat insulating layer outside dryer, waste heat from tail gas is fully used;The wind tower of outer cylinder lower part It ensure that hot wind even into so that raw coal drying is uniform;Raw coal " it " font in dryer is turned back flowing, and raw coal is strengthened Drying effect;Multi-layer rotational flow body in flue enhances heat transfer effect, is conducive to the drying of raw coal;Injection tube, peep hole and swollen The use of swollen section ensure that the safe operation of dryer.

Detailed description of the invention

Fig. 1 is rotary kiln production technology schematic diagram;

Fig. 2 is schematic structural view of the invention;

Fig. 3 is partial enlarged view;

Fig. 4 is I schematic perspective view of dispenser;

Fig. 5 is II schematic perspective view of dispenser;

Fig. 6 is wind tower schematic perspective view;

Fig. 7 is embodiment using process diagram;

Wherein: 1- preheater, 2- rotary kiln, 3- cooler, 4- burner, 5- flue, 6- inlet exhaust gas, 7- feed inlet, 8- outer cylinder, 9- insulating layer, 10- peep hole, 11- platform, 12- rotary fluid, 13- annular bellows, 14- bottom hopper, 15- tail gas go out Mouth, 16- hot wind inlet, 17- wind tower, 18- dispenser I, 19- injection tube, 20- dispenser II, 21- expansion chamber, 22- expansion joint, 23- air outlet, 24- ventilation hole, 25- ventilation ring beam, 26- blast cap, 27- communicating pipe, 28- support plate, 29- feed mine slot, 30- vibration Dynamic batcher, 31- feeding bucket elevator, 32- belt feeder, 33- air blower, 34- hot air duct, 35- dryer deduster, 36- dry Dry power traction blower, 37- dryer chimney.

Specific embodiment

The present embodiment is the tower drier being mounted on lime rotary kiln flue, the drying for raw coal.

The structure of the tower drier is as shown in Fig. 2, including flue 5 and outer cylinder 8, and design has inlet exhaust gas 6 and tail gas Outlet 15, feed inlet 7 and bottom hopper 14, hot wind inlet 16 and air outlet 23.Flue 5 passes through among dryer outer cylinder 8, cigarette Welding is fixed admittedly for the top and bottom in road 5 and outer cylinder 8, is equipped with expansion joint 22 on the top of flue 5, utilizes the axial direction of expansion joint 22 It is thermally expanded as caused by the temperature difference between elastic accommodation flue 5 and outer cylinder 8, reduces stress, it is integrally-built to avoid dryer It destroys.Spacing between the rotary fluid 12 for being internally provided with no less than two layers of flue 5, rotary fluid 12 is less than in flue diameter 5 times, the exhaust gas flow in flue 5 can be forced to spin shape advance, its laminar condition is destroyed, increase tail gas turbulent flow, improve tail The heat transfer efficiency of gas and flue metallic walls.

Arranging multiplayer cone dispenser I 18 and dispenser II 20 between flue 5 and outer cylinder 8, such as attached drawing 4 and attached drawing 5 It is shown.Dispenser I 18 is welded on 8 inside of outer cylinder, and dispenser II 20 is welded on 5 outside of flue, and the two forms " it " word stacking knot Structure is uniformly laid between flue 5 and outer cylinder 8, disperses whereabouts stream.Raw coal " it " font that completes above and below dispenser is turned back stream It is dynamic, raw coal whereabouts process can be increased, extend the time that raw coal is contacted with dispenser, be conducive to the abundant drying of raw coal.It is spreading Multiple ventilation holes 24 are offered on device I 18 and dispenser II 20, hot wind from bottom to top can pass through dispenser by ventilation hole 24, Reinforce the heat exchange with the raw coal on dispenser.On the top of each dispenser, injection tube 19 is installed, as shown in Fig. 3, spray The wind that there are many blowing mouth, blows out from blowing mouth is opened up on blowpipe 19 and can be blown down accumulates on dispenser I 18 and dispenser II 20 Raw coal.

Annular bellows 13 are installed in the lower outside of outer cylinder 8, annular bellows 13 are connected to the wind tower 17 in outer cylinder 8, wind 17 structure of tower is as shown in Fig. 6, including ventilation ring beam 25, blast cap 26, communicating pipe 27, support plate 28 etc., communicating pipe 27 connected ring Shape bellows 13 and ventilation ring beam 25, support plate 28 are welded to connect flue and ventilation ring beam 25, play fixed support ventilation ring beam 25 Effect.Blast cap 26 be steel plate weldment, inside have ventilating duct, be uniformly arranged in ventilation ring beam 25 on, play introducing and The effect of cloth hot wind.

As shown in Fig. 2, the outside of outer cylinder 8 is coated with insulating layer 9, and the heat in dryer is prevented to scatter and disappear outward.Outside Peep hole 10 is arranged in corresponding position on the barrel of cylinder 8, necessary in favor of flowing and accumulation situation of the observation raw coal on dispenser When, detachable peep hole 10, the raw coal adhered on II 20 conical surface of manual cleaning dispenser I 18 and dispenser.It is welded on the outside of outer cylinder 8 Multilayer is connected to convenient for the platform 11 and ladder of observation, cleaning and maintenance.

The present embodiment is in use, as shown in Fig. 6, the loaded machine of raw coal is sent into feed mine slot 29, through oscillating feeder 30 and feeding bucket elevator 31 be sent into tower drier in, raw coal is turned back in " it " font to be flowed in dropping process, with flue and heat Wind sufficiently exchanges heat drying, falls into the bottom hopper 14 of lower part, is then transported to truck by oscillating feeder 30 and belt feeder 32, The raw coal after drying is sent to coal dust milling station by truck.

Dryer inlet exhaust gas 6 connects the exhanst gas outlet of lime rotary kiln preheater, and offgas outlet 15 connects rotary kiln tail Gas deduster.The tail gas for meeting emission request through dedusting is discharged into atmosphere by air-introduced machine by chimney, at this time the tail in chimney Temperature degree is about 150 DEG C or so.Air blower 33 connects tail gas funnel, and the cleaning tail gas hot wind after dust removal process is through hot air duct 34 Annular bellows 13 are connected to, are sent into dryer through wind tower.After hot wind dries raw coal, the air outlet 23 on drying machine top enters In dryer deduster 35, the hot wind drying power traction blower 36 for meeting emission request through dedusting is sent into 37 row of dryer chimney Out.

In fig 2, the top design between flue and outer cylinder has expansion chamber 21.Expansion chamber 21 has biggish space, Rise the raw coal particle that hot wind is carried and raised to be sunk under the effect of gravity in expansion chamber 21 because of the reduction of air-flow velocity Drop, reduces out the dustiness of dryer air-flow, to reduce the workload of dryer deduster 35.

Tower drier is provided with many places temperature pick-up sensor and pressure transmitting sensor along short transverse, for drying Machine work when detect corresponding site temperature and pressure, then by these detection datas enter rotary kiln automatic control system into Row operation is compared, and the operating status of dryer system is monitored, to adjust apparatus and process operating parameter in time.

Flue is arranged in the middle part of this tower drier, material drying and dust tail gas are separated, the pollution of material is prevented, and is dried Insulating layer is coated outside machine, is equivalent to a hot air drying stove, waste heat from tail gas is fully used;The wind tower of bottom ensure that heat Wind is even into ensure that raw coal is uniformly dried;Raw coal " it " font in dryer is turned back flowing, and raw coal baking is strengthened Dry effect;Multi-layer rotational flow body in flue enhances heat transfer effect, is conducive to the drying of raw coal;Injection tube, peep hole and expansion The use of section ensure that the safe operation of dryer.

Claims (5)

1. the tower drier that a kind of waste heat from tail gas recycles, it is characterised in that: including outer cylinder (8), be coated on outer cylinder (8) outside The insulating layer (9) in face, from the outer cylinder (8) center across flue (5), the circular cone that is arranged in outer cylinder (8) and flue (5) Shape dispenser I (18) and conical dispenser II (20);In the expansion chamber (21) of the outer cylinder (8) inside top design, in institute It states the annular bellows (13) of outer cylinder (8) lower outside installation, be located at the wind tower being connected in outer cylinder (8) with annular bellows (13) (17);The wind tower (17) includes ventilation ring beam (25), blast cap (26), communicating pipe (27) and support plate (28);The communicating pipe (27) annular bellows (13) and ventilation ring beam (25) are connected to;The support plate (28) is welded to connect flue (5) and ventilation ring beam (25);There is ventilating duct, which is evenly arranged in ventilation ring beam (25) inside the blast cap (26).
2. tower drier according to claim 1, it is characterised in that: the top of the flue (5) is equipped with expansion joint (22), flue (5) is equipped with no less than two layers of rotary fluid (12).
3. tower drier according to claim 2, it is characterised in that: the spacing of the rotary fluid (12) is less than flue (5) 5 times of diameter.
4. tower drier according to claim 1, it is characterised in that: the dispenser I (18) and dispenser II (20) On be designed with ventilation hole (24), injection tube (19) are installed in the upper end of the dispenser I (18) and dispenser II (20).
5. tower drier according to claim 1, it is characterised in that: be equipped with peep hole on the outer cylinder (8) (10) and platform (11).
CN201710637359.3A 2017-07-31 2017-07-31 A kind of tower drier that waste heat from tail gas recycles CN107576190B (en)

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CN111397204A (en) * 2018-08-02 2020-07-10 巴红宇 Waste heat recovery-based drying method for spinning

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CN2911570Y (en) * 2006-03-20 2007-06-13 唐德顺 Afterheat utilizing dryer
CN201343523Y (en) * 2009-01-20 2009-11-11 广州市宇联机电有限公司 Multi-wind-distribution fixed bed biomass gasification furnace
CN101520274A (en) * 2009-04-08 2009-09-02 主父仲凯 Tower-type dryer
CN201514093U (en) * 2009-08-19 2010-06-23 淮安市捷达粮食设备有限公司 Multi-element heating stacked grain drying device
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