CN204555606U - A kind of drying system of two-stage drying machine combination - Google Patents
A kind of drying system of two-stage drying machine combination Download PDFInfo
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- CN204555606U CN204555606U CN201420843685.1U CN201420843685U CN204555606U CN 204555606 U CN204555606 U CN 204555606U CN 201420843685 U CN201420843685 U CN 201420843685U CN 204555606 U CN204555606 U CN 204555606U
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Abstract
The utility model relates to a kind of drying system, particularly relates to the drying system of a kind of two-stage drying machine combination; It comprises: the one-level pipe drier that order is connected and secondary fluidisation mobile bed drying machine; Wet stock to be dried is after described one-level pipe drier tentatively dehumidifies, enter the product that described secondary fluidisation mobile bed drying machine is dried to the moisture content that meets the requirements further, described secondary fluidisation mobile bed drying machine is provided with at least one gas distributor for adjustments of gas flow velocity and pressure; Described secondary fluidisation mobile bed drying machine bottom is provided with the pipeline of logical saturated or superheated steam or nitrogen or wet stock hygroscopic water gas or inert gas; The waste hot steam that moving fluid bed drying machine of the present utility model produces, a part utilizes as fluidizing agent repeats itself, a part is back to one-level pipe drier as thermal source, realizes waste hot steam heat high efficiente callback recycling, greatly reduces the energy ezpenditure of production unit product.
Description
Technical field
The utility model relates to a kind of drying system, particularly relates to the drying system of a kind of two-stage drying machine combination.
Background technology
In industrial production, hygroscopic water contained by many types high moisture material is had to need to be reduced to lower moisture content, for brown coal, be no matter burning, transport or for meeting Coal Chemical Industry technological requirement, all often needing first moisture to be brown coal drying to the whole moisture of 30%-70% (wet basis) is the brown coal product of 3%-7% (wet basis).
The equipment of conventional dry high moisture material and method adopt: A) heat smoke is as the direct heated material of thermal source, or B) vapours is as thermal source indirect material.The former due to high by material fugitive constituent, or is subject to the impact of EAT, for material (such as brown coal) the easily catching fire that burning-point is low, there is potential safety hazard; The latter adopts indirect, and the calorific value of steam is high, and process safety is reliable, but the latter needs the fuel consuming high heating value, and financial cost is high.
But, due to most of wet stock, moisture is 30%-70% (wet basis) as before, its critical moisture content is at the brown coal of 12%-15% (wet basis) left and right, its dry run is divided into two stages, is namely dried to the constant rate drying period of critical moisture content from first moisture and is dried to the falling rate drying period of product requirement moisture from critical moisture content.Wet stock drying efficiency when constant rate drying period adopts the technical scheme of CN101581533A is higher; But at falling rate drying period, because rate of drying depends primarily on the migration rate of moisture at internal batch, if continue the technical scheme of CN101581533A, because the motion state of wet stock is little on the impact of its rate of water loss, under the state that simultaneously also this kind of for brown coal material to be dried will be maintained " fluidization " by greater energy consumption, cause the problem that production unit product energy consumption is higher; On the other hand, in dry run in the past, the waste hot steam that drying equipment is discharged mostly directly emits after cleaner dedusting, and self-contained quite a few heat of waste hot steam does not obtain effective recycling, causes the waste of energy.
Therefore, from the security of drying process, economy and high efficiency angle, be necessary in fact a kind of new hygroscopic water separator of drying property rule design for such as this kind of wet stock of brown coal, realize the efficient rapid moisture removal of wet stock at constant rate drying period and the low energy consumption degree of depth dehumidification at falling rate drying period, reach dry run energy ezpenditure coupling optimization, and configure by the reasonable combination of system inner drying equipment room the heat carried in the used heat steam of output in effective recycling dry run, reduce the energy ezpenditure of production cost and production unit product.
Utility model content
Technical problem to be solved in the utility model is the deficiency overcoming above-mentioned prior art, the drying system that a kind of two-stage drying machine combines is provided, in conjunction with the characteristic rule of wet stock dry run, adopt the drying system of two-stage drying machine combination, i.e. one-level tube type drying and secondary fluidisation mobile bed drying, wet stock is first after one-level pipe drier tentatively dehumidifies, continue to be dried to by energy-efficient the product requiring moisture content in secondary fluidisation mobile bed drying machine, material after one-level pipe drier tentatively dehumidifies also can go other operation according to technological requirement, by carrying out the heat that effectively reclaiming waste heat steam carries to the reasonable combination configuration between drying equipment in process.
The main technical schemes that the drying system of a kind of two-stage drying machine combination that the utility model provides adopts is: it comprises: the one-level pipe drier that order is connected and secondary fluidisation mobile bed drying machine; Wet stock to be dried is after described one-level pipe drier tentatively dehumidifies, enter the product that described secondary fluidisation mobile bed drying machine is dried to the moisture content that meets the requirements further, described secondary fluidisation mobile bed drying machine is provided with at least one gas distributor for adjustments of gas flow velocity and pressure, and fluidizing gas enters described secondary fluidisation moving bed dryer by described gas distributor; Described secondary fluidisation mobile bed drying machine bottom is provided with the pipeline of logical saturated or superheated steam or nitrogen or wet stock hygroscopic water gas or inert gas, for operating modes such as system start-stop car, emergency work condition process, or for regulating moving fluid bed drier internal temperature to prevent the technique needs such as material sex change; The waste hot steam outlet of described secondary fluidisation mobile bed drying machine is connected with the heat source medium import of described one-level pipe drier.
The drying system of a kind of two-stage drying machine combination that the utility model provides also adopts following attached technical scheme:
Described one-level pipe drier comprises: feeder I, tube drier, discharger I and power set that order is connected, described feeder I is connected with the feed end of described tube drier, described discharger I is connected with the discharge end of described tube drier, and described power set are connected with described tube drier.
Described tube drier comprises heat source medium import, hollow main shaft pipe, dries pipe, tail end venting device and condensate water recovery device; Described hollow main shaft pipe and oven dry pipe two ends are separately fixed at the rear and front end of tube drier; Waste hot steam entrance is connected with the shell side of condensate water recovery device with described tube drier.
Described hollow main shaft pipe one end open and be provided with several venthole on the tube wall of open at one end, the other end is remained silent; Described heat source stream import is connected with described hollow main shaft tube opening end.
Described oven dry pipe is that honeycomb or triangle are arranged in tube drier.
The spirality guiding pipe of hollow is provided with in described oven dry pipe, heat source medium is connected with in the spirality guiding pipe of hollow, add heat exchange area, the gap of suitable distance is left between the spirality guiding circular tube external wall of hollow and oven dry inside pipe wall, described spirality guiding pipe is fixedly supported on dries on inside pipe wall by being welded on cylindrical metal rod on spirality guiding circular tube external wall or the suitable length spirality guide card that pipe is consistent and its spiral profile and spirality lead, described cylindrical metal rod or spirality guide card on spirality guiding pipe length direction at interval of certain distance, and on the projection perimeter cross section of spirality guiding pipe length direction angled single/or sheet distribution, to reduce the obstruct to drying material movement in pipe as far as possible, the pitch of spirality guiding pipe, and the clearance distance left between spirality guiding circular tube external wall and oven dry inside pipe wall can according to the grain shape of material and granularity, the parameters such as the dried time required rationally are arranged.
Described tube drier self tilts certain angle, and wet stock promotes at dry in-pipe by means of gravity and described spirality guiding pipe.
Described secondary fluidisation mobile bed drying machine comprises: feeder II, moving fluid bed drier and discharger II that order is connected.
Described moving fluid bed drier comprises constant rate of drying fluid bed section and falling-rate periods of drying moving bed section, described falling-rate periods of drying moving bed section is positioned at the below of described constant rate of drying fluid bed section, described feeder II is connected with described constant rate of drying fluid bed section, and described discharger II is connected with described falling-rate periods of drying moving bed section.
Described one-level pipe drier and described secondary fluidisation mobile bed drying machine are respectively equipped with deduster I and deduster II, described deduster I is connected with the tail end venting device of described tube drier, and the waste hot steam outlet of described secondary fluidisation mobile bed drying machine is connected with the heat source medium import of described one-level pipe drier by deduster II; The waste hot steam of described constant rate of drying fluid bed section and falling-rate periods of drying moving bed section output is after described deduster II dedusting, part waste hot steam returns to described gas distributor by cycle pressure device, and a part of waste hot steam is back to described one-level pipe drier as thermal source.
Described deduster is one or more tandem compounds in cyclone dust collectors, sack cleaner, electrostatic precipitator and wet scrubber.
A material scarfier is provided with between described falling-rate periods of drying moving bed section and described discharger II, described material scarfier makes saturated or superheated steam or nitrogen or other inert gases enter described falling-rate periods of drying moving bed section in the mode of pulse air intake, and material bed from bottom to top through in moving fluid bed drying machine moving bed section, play material in loose falling-rate periods of drying moving bed section and carry away the effect of hygroscopic water gas.
Described constant rate of drying fluid bed section and described falling-rate periods of drying moving bed section are provided with at least one group of heat exchanger; Described heat exchanger provides heat by saturated or superheated steam or machine solvent vapour or flue gas or hot water or conduction oil or fused salt, described heat exchanger is connected with equipment with the feed water system of boiler or it, heat transferring medium after heat exchange is according to its use of technological requirement, and the condensed water generated after heat transferring medium heat exchange in heat exchanger can deliver to the feed water system of boiler.
Described heat exchanger is one or more combinations in built-in heat exchanger, jacketed type exchanger, coil exchanger.
Described feeder II is arranged on the top of described moving fluid bed drier, and described discharger II is arranged on the bottom of described moving fluid bed drying device, is convenient to material to be dried and moves from the top down by gravity.
Be its critical moisture content through described constant rate of drying fluid bed section dried wet stock water capacity or there is certain downward shift with its critical moisture content, deviation range is within 20% of its critical moisture content.
Drying means of the present utility model is:
Drying means of the present utility model is divided into one-level pipe drier drying stage and secondary fluidisation mobile bed drying machine drying stage, at one-level pipe drier drying stage, tube side walked by wet stock, heat source medium walks shell side, tube drier rotates around the central shaft of body under the drive of power set, wet stock is by means of gravity and dry the promotion of pipe inner-spiral type guiding pipe at oven dry in-pipe, indirect heat exchange is realized with heat source medium in moving process, hygroscopic water in wet stock is evaporated separation, and the material after preliminary dehumidifying is discharged by discharger I, at secondary fluidisation mobile bed drying machine drying stage, material after one-level pipe drier tentatively dehumidifies or be transported to moving fluid bed drier through feeder II from the initial wet material in the external world, moving fluid bed drier is divided into two different bed sections, by controlling the time of staying of wet stock in different bed section, (wet stock approaches to critical moisture content constant rate of drying fluid bed section is dried, within being just its critical moisture content or its critical moisture content 20% scope of downward shift, then entering falling-rate periods of drying moving bed section continues dry), the product being finally dried to qualified hygroscopic water discharges drying system through discharger, the material hygroscopic water removed in dry run is superheated vapor state, discharged by moving fluid bed drier top with the form of used heat steam, two-way is divided into after deduster II dedusting, one road used heat steam is back to one-level pipe drier as thermal source by pressue device I is supplementary, one road used heat steam returns to described gas distributor by cycle pressure device II, return used heat steam to described gas distributor except a small amount of heat is provided, wet stock fluidization in constant rate of drying fluid bed section will be entered mainly as fluidizing gas, wet stock realizes indirect heat exchange with the heat source medium in the heat exchanger in constant rate of drying fluid bed section under fluidized state, by controlling the time of staying of wet stock in constant rate of drying fluid bed section, wet stock is dried approaches to critical moisture content, then entering falling-rate periods of drying moving bed section continues dry.In the process, by regulating the frequency converter frequency of cycle pressure device II (when cycle pressure device does not wear frequency converter, valve on adjustable press device air outlet pipeline), control the vapor flow rate entering moving fluid bed drying device, pressure and other parameters, come indirect regulation constant rate of drying fluid bed section and the intersegmental stratification interface height of falling-rate periods of drying moving bed, and maintain the fluidization that in constant rate of drying fluid bed section, wet stock is stable, realize the critical moisture content of wet stock corresponding wet stock water capacity and wet stock self when the interface by constant rate of drying fluid bed section and falling-rate periods of drying moving bed section close to coincideing.Described " close to coincideing " refers to that the critical moisture content of wet stock corresponding wet stock water capacity and wet stock self when the interface by constant rate of drying fluid bed section and falling-rate periods of drying moving bed section can be that both fit like a glove, also can be that both exist certain downward shift, deviation range be within 20% scope of wet stock critical moisture content; The wet stock entered in falling-rate periods of drying moving bed section continues to realize indirect heat exchange with the heat source medium in the heat exchanger in this section, after being finally dried to the qualified hygroscopic water material of product requirement, is discharged from the bottom of drying system by discharger II.
The beneficial effect of moving fluid bed drying device of the present utility model is:
1) moving fluid bed drying device of the present utility model is divided into constant rate of drying fluid bed section and falling-rate periods of drying moving bed section, the efficient rapid moisture removal of wet stock in constant rate of drying fluid bed section and the low energy consumption degree of depth dehumidification in falling-rate periods of drying moving bed section, achieve dry run energy ezpenditure coupling optimization.
2) waste hot steam of moving fluid bed drying machine generation of the present utility model, a part utilizes as fluidizing agent repeats itself, a part is back to one-level pipe drier as thermal source, realize waste hot steam heat high efficiente callback recycling, greatly reduce the energy ezpenditure of production unit product.
3) the hollow screw shape conduit in pipe drier of the present utility model can lead to heat source medium, compared with traditional spirality guide card, adds heat exchange area, substantially increases heat exchanger effectiveness.
4) available saturated or superheated steam or nitrogen or wet stock hygroscopic water gas or inert gas be by the air displacement in drying device out under device start-stop car or special operation condition for the pipeline of logical saturated or superheated steam or nitrogen or wet stock hygroscopic water gas or inert gas of the present utility model, whole overheating steam drying process is oxygen-free environment, eliminates inflammable and explosive potential safety hazard.
Accompanying drawing explanation
Fig. 1 is the structural representation of the drying system of the utility model two-stage drying machine combination;
Fig. 2 is the partial enlarged drawing of drying pipe in pipe drier.
Fig. 3 is the cross sectional view of drying pipe.
Detailed description of the invention
Below in conjunction with drawings and Examples, the utility model is further illustrated.
See Fig. 1, the drying system of a kind of two-stage drying machine combination of the present utility model, comprises the connected one-level pipe drier of order and secondary fluidisation mobile bed drying machine; Wet stock to be dried is after described one-level pipe drier tentatively dehumidifies, enter the product that described secondary fluidisation mobile bed drying machine is dried to the moisture content that meets the requirements further, described one-level pipe drier comprises: feeder I 10, tube drier 11, discharger I 14 and power set 12 that order is connected, described feeder I 10 is connected with the feed end of described tube drier 11, described discharger I 14 is connected with the discharge end of described tube drier 11, and described power set 12 are connected with described tube drier 11; Described secondary fluidisation mobile bed drying machine comprises: feeder II 1, moving fluid bed drier 7 and discharger II 2 that order is connected.
See Fig. 1, described moving fluid bed drier 7 is provided with at least one gas distributor 73 for adjustments of gas flow velocity and pressure, and fluidizing gas enters described moving fluid bed drier 7 by described gas distributor 73; Described moving fluid bed drier 7 bottom is provided with the pipeline 75 of logical saturated or superheated steam or nitrogen or wet stock hygroscopic water gas or inert gas, for operating modes such as system start-stop car, emergency work condition process, or for regulating moving fluid bed drier internal temperature to prevent the technique needs such as material sex change; The waste hot steam outlet of described moving fluid bed drier 7 is connected with the heat source medium import of described one-level pipe drier 11.The waste hot steam that moving fluid bed drying machine produces by the present embodiment, a part utilizes as fluidizing agent repeats itself, a part is back to one-level pipe drier as thermal source, realizes waste hot steam heat high efficiente callback recycling, greatly reduces the energy ezpenditure of production unit product.
Preferably, described tube drier 11 comprises heat source medium import, hollow main shaft pipe, dries pipe 13, tail end venting device and condensate water recovery device; Described hollow main shaft pipe and oven dry pipe two ends are separately fixed at the rear and front end of tube drier 11; Waste hot steam entrance is connected with the shell side of condensate water recovery device with described tube drier 11.
Preferably, described hollow main shaft pipe one end open and be provided with several venthole on the tube wall of open at one end, the other end is remained silent; Described heat source stream import is connected with described hollow main shaft tube opening end.
Preferably, described oven dry pipe 13 is that honeycomb or triangle are arranged in tube drier 11.
Preferably, the spirality guiding pipe 15 of hollow is provided with in described oven dry pipe 13, heat source medium can be connected with in the spirality guiding pipe 15 of hollow, increase the heat exchange area of drying pipe 13, the gap of suitable distance is left between spirality guiding pipe 15 outer wall of hollow and oven dry pipe 13 inwall, described spirality guiding pipe 15 is fixedly supported on dries on pipe 13 inwall by being welded on cylindrical metal rod 17 on spirality guiding pipe 15 outer wall or the suitable length spirality guide card (not shown) that pipe 15 is consistent and its spiral profile and spirality lead, described cylindrical metal rod 17 or spirality guide card (not shown) on spirality guiding pipe 15 length direction at interval of certain distance, and on the projection perimeter cross section of spirality guiding pipe 15 length direction angled single/or sheet welding distribution, to reduce the obstruct to drying material movement in pipe 13 as far as possible, the pitch of spirality guiding pipe 15, and the clearance distance left between spirality guiding pipe 15 outer wall and oven dry pipe 13 inwall can according to the grain shape of material and granularity, the parameters such as the dried time required rationally are arranged.
Preferably, described tube drier 11 self tilts certain angle, and wet stock promotes movement in oven dry pipe 13 by means of gravity and described spirality guide pipe.
Preferably, described moving fluid bed drier 7 comprises constant rate of drying fluid bed section 71 and falling-rate periods of drying moving bed section 72, described falling-rate periods of drying moving bed section 72 is positioned at the below of described constant rate of drying fluid bed section 71, described feeder II 1 is connected with described constant rate of drying fluid bed section 71, and described discharger II 2 is connected with described falling-rate periods of drying moving bed section 72.The moving fluid bed drier of the present embodiment is divided into constant rate of drying fluid bed section and falling-rate periods of drying moving bed section, the efficient rapid moisture removal of wet stock in constant rate of drying fluid bed section and the low energy consumption degree of depth dehumidification in falling-rate periods of drying moving bed section, achieve dry run energy ezpenditure coupling optimization.
Preferably, described one-level pipe drier and described secondary fluidisation mobile bed drying machine are respectively equipped with deduster I 9 and deduster II 3, deduster I 9 is connected with the tail end venting device of described tube drier 11, and top/or the top of deduster II 3 and described moving fluid bed drier 7 are connected; The waste hot steam outlet of described secondary fluidisation mobile bed drying machine is connected with the heat source medium import of described one-level pipe drier by deduster II 3; The waste hot steam of described constant rate of drying fluid bed section 71 and falling-rate periods of drying moving bed section 72 output is after deduster II 3 dedusting, part waste hot steam returns to described gas distributor 73 by cycle pressure device 4, and a part of waste hot steam is back to described one-level pipe drier as thermal source by pressue device 8.
Preferably, described deduster is one or more tandem compounds in cyclone dust collectors, sack cleaner, electrostatic precipitator and wet scrubber.
Preferably, a material scarfier 74 is provided with between described falling-rate periods of drying moving bed section 72 and described discharger II 2, described material scarfier 74 makes saturated or superheated steam or nitrogen or other inert gases enter described falling-rate periods of drying moving bed section 72 in the mode of pulse air intake, and material bed from bottom to top through in the moving bed section of moving fluid bed drier, play material in loose falling-rate periods of drying moving bed section 72 and carry away the effect of hygroscopic water gas.
Preferably, described constant rate of drying fluid bed section 71 and described falling-rate periods of drying moving bed section 72 are provided with at least one group of heat exchanger 6; Described heat exchanger 6 provides heat by saturated or superheated steam or machine solvent vapour or flue gas or hot water or conduction oil or fused salt, described heat exchanger is connected with equipment with the feed water system of boiler or it, heat source medium after heat exchange is according to its use of technological requirement, and the condensed water generated after heat exchange when heat exchanger 6 endogenous pyrogen medium is steam can deliver to the feed water system of boiler.
Preferably, described heat exchanger 6 is one or more combinations in built-in heat exchanger, jacketed type exchanger, coil exchanger.
Preferably, described feeder II 1 is arranged on the top of described moving fluid bed drier 7, and described discharger II 2 is arranged on the bottom of described moving fluid bed drier 7, is convenient to material to be dried and moves from the top down by gravity.
Preferably, be its critical moisture content through described constant rate of drying fluid bed section 71 dried wet stock water capacity or there is certain downward shift with its critical moisture content, deviation range is within 20% of its critical moisture content.
Below the embodiment that material to be dried chooses brown coal:
Water content is that the brown coal raw coal of 30%-70% (wet basis) is through fragmentation, the brown coal particle that diameter is less than 6mm is formed after screening, brown coal particle is admitted in the tube side of tube drier 1 by feeder I 10, the waste hot steam being back to one-level pipe drier is entered in the shell side of tube drier 1 and the tube side of spiral shaped catheter 15 (when technique needs supplementary new heat source stream by pressue device 8 as thermal source, together enter in the shell side of tube drier 1 and the tube side of spiral shaped catheter 15 with the described waste hot steam being back to one-level pipe drier), brown coal particle by means of gravity and dry pipe spiral conduit 15 promotion at dry in-pipe, indirect heat exchange is realized with heat source medium in moving process, moisture in brown coal is evaporated separation, brown coal particle after preliminary dehumidifying is discharged by discharger I 14, then be transported in moving fluid bed drier 7 through feeder II 1, heat source medium is sent into the heat exchanger 6 in constant rate of drying fluid bed section 71, heat source medium is sent into the heat exchanger 6 in falling-rate periods of drying moving bed section 72, the waste hot steam in superheated steam state of the pressue device of self-loopa in the future 4 passes into the gas distributor 73 in moving fluid bed drier 7, the described waste hot steam from cycle pressure device 4 is except providing a small amount of heat, the fluidization of material in bed is maintained in the constant rate of drying fluid bed section 71 entering described moving fluid bed drier 7 mainly as fluidizing agent, brown coal particle in described constant rate of drying fluid bed section 71 realizes indirect heat exchange with the heat source medium in the heat exchanger 6 in described constant rate of drying fluid bed section 71 under fluidized state, by controlling the wet time of staying of brown coal particle in constant rate of drying fluid bed section 71, the dried critical moisture content approaching to brown coal of wet stock, as for critical moisture content being the dissimilar brown coal of 12%-15% (wet basis) left and right, in constant rate of drying fluid bed section 71, just wet brown coal particle can be dried to its critical moisture content and 12%-15% (wet basis) left and right by original water content, or within being dried to its critical moisture content 20% scope of downward shift, namely moisture is in 9%-18% (wet basis) left and right, then enter in described falling-rate periods of drying moving bed section 72 and continue drying, in the process, by regulating the frequency converter frequency of cycle pressure device 4 (when cycle pressure device 4 does not wear frequency converter, the governor motions such as the valve on its air outlet pipeline adjustable), control the waste hot steam amount entered in constant rate of drying fluid bed section 71, thus ensure that the material in constant rate of drying fluid bed section 71 maintains stable fluidization, the brown coal particle entered in described falling-rate periods of drying moving bed section 72 continues to realize indirect heat exchange with the heat source medium in the heat exchanger 6 in described falling-rate periods of drying moving bed section 72, finally be dried to the qualified brown coal product of satisfactory moisture as 3%-7% (wet basis), then discharge drying system by discharger II 2.In the process, saturated or superheated steam or nitrogen or wet stock hygroscopic water gas or inert gas is passed in the pipeline 75 that falling-rate periods of drying moving bed section 72 bottom is provided with, for system start-stop car, emergency work condition process or regulate moving fluid bed drier 7 internal temperature, as when system is initially driven, before wet brown coal particle sends into moving fluid bed drier 7 by feeder II 1, first 75 in moving fluid bed drier 7, pass into saturated or superheated steam or nitrogen or inert gas by the road, air displacement inner in moving fluid bed drier 7 is gone out system, obtain anaerobic dry environment with the generation spontaneous combustion of brown coal particle or the blast that prevent from sending in moving fluid bed drier 7 or chemical reaction occurs, or when system shutdown, emergency work condition process, 75 pass into saturated or superheated steam or nitrogen or inert gas to maintain the oxygen-free environment of moving fluid bed drier 7 inside by the road, in case brown coal particle generation spontaneous combustion in fluid stopping moving bed dryer 7 or blast or chemical reaction occurs, or regulate moving fluid bed drier 7 internal temperature according to process requirements, to avoid material decomposition or sex change etc. occur during drier heat sensitive materials in dry run.In the process, move smooth and easy for making brown coal particle blanking in falling-rate periods of drying moving bed section 72, material scarfier 74 is provided with in described falling-rate periods of drying moving bed section 72, saturated or superheated steam or nitrogen or inert gas or hygroscopic water gas enter in falling-rate periods of drying moving bed section 72 by described material scarfier 74 in the mode of pulse air intake, material bed from bottom to top through in described falling-rate periods of drying moving bed section 72 of loose gas, except a small amount of heat is provided, mainly plays material in loose described falling-rate periods of drying moving bed section 72 and carry away the effect of hygroscopic water gas.
Fluidizing gas, loose gas, the steam that the moisture of brown coal particulate removal is formed form waste hot steam jointly, to be superheated steam state discharged by the top/of moving fluid bed drier 7 or top this waste hot steam, after deduster II 3 dedusting, cycle pressure device 4 of leading up to returns and is back to one-level pipe drier to described gas distributor 73, tunnel as thermal source.In process, the waste hot steam that secondary fluidisation moving bed dryer 7 is discharged is after deduster II 3 dedusting, can as thermal source fully recovering in one-level pipe drier, or remainder is according to its use of technological requirement, pressue device 4 also can by all or part of come from saturated or superheated steam outside system or nitrogen or wet stock hygroscopic water gas or inert gas pressurization after add to described gas distributor 73, play the effect of fluidizing agent, with the fluidization of wet stock in the constant rate of drying fluid bed section 71 maintaining described moving fluid bed drier 7.Steam in heat exchanger 6 on moving fluid bed drier 7 goes the feed water system of boiler or according to its use of technological requirement through the condensed water that indirect heat exchange generates, discharge often organize the condensed water that heat exchanger 6 generates each branch road on or the house steward that converges of each branch road can be arranged arbitrarily as devices such as steam traps according to designing requirement.
By reference to the accompanying drawings detailed description of the invention of the present utility model is described although above-mentioned; but the restriction not to the utility model protection domain; one of ordinary skill in the art should be understood that; on the basis of the technical solution of the utility model, those skilled in the art do not need to pay various amendment or distortion that creative work can make still within protection domain of the present utility model.
Claims (16)
1. a drying system for two-stage drying machine combination, it comprises: the one-level pipe drier that order is connected and secondary fluidisation mobile bed drying machine; Wet stock to be dried, after described one-level pipe drier tentatively dehumidifies, enters the product that described secondary fluidisation mobile bed drying machine is dried to the moisture content that meets the requirements further, it is characterized in that:
Described secondary fluidisation mobile bed drying machine is provided with at least one gas distributor for adjustments of gas flow velocity and pressure; Described secondary fluidisation mobile bed drying machine bottom is provided with the pipeline of logical saturated or superheated steam or nitrogen or wet stock hygroscopic water gas or inert gas, for system start-stop car, emergency work condition process or regulate the inner bed material temperature of moving fluid bed drying device; The waste hot steam outlet of described secondary fluidisation mobile bed drying machine is connected with the heat source medium import of described one-level pipe drier.
2. the drying system of a kind of two-stage drying machine combination according to claim 1, it is characterized in that: described one-level pipe drier comprises: feeder I, tube drier, discharger I and power set that order is connected, described feeder I is connected with the feed end of described tube drier, described discharger I is connected with the discharge end of described tube drier, and described power set are connected with described tube drier.
3. the drying system of a kind of two-stage drying machine combination according to claim 2, is characterized in that: described tube drier comprises heat source medium import, hollow main shaft pipe, dries pipe, tail end venting device and condensate water recovery device; Described hollow main shaft pipe and oven dry pipe two ends are separately fixed at the rear and front end of tube drier; Waste hot steam entrance is connected with the shell side of condensate water recovery device with described tube drier.
4. the drying system of a kind of two-stage drying machine combination according to claim 3, it is characterized in that: the spirality guiding pipe being provided with hollow in described oven dry pipe, described spirality guiding pipe is fixedly supported upon dries on inside pipe wall by being welded on cylindrical metal rod on spirality guiding circular tube external wall or the suitable length spirality guide card that pipe is consistent and its spiral profile and spirality lead.
5. the drying system of a kind of two-stage drying machine combination according to claim 3, is characterized in that: described hollow main shaft pipe one end open and be provided with several venthole on the tube wall of open at one end, and the other end is remained silent; Described heat source medium import is connected with described hollow main shaft tube opening end.
6. the drying system of a kind of two-stage drying machine combination according to claim 3, is characterized in that: described oven dry pipe on tube drier body cross section in honeycomb or triangular pitch in tube drier.
7. the drying system of a kind of two-stage drying machine combination according to claim 4, is characterized in that: described tube drier self tilts certain angle, and wet stock promotes at dry in-pipe by means of gravity and described spirality guiding pipe.
8. the drying system of a kind of two-stage drying machine combination according to claim 1, is characterized in that: described secondary fluidisation mobile bed drying machine comprises: feeder II, moving fluid bed drier and discharger II that order is connected.
9. the drying system of a kind of two-stage drying machine combination according to claim 8, it is characterized in that: described moving fluid bed drier comprises constant rate of drying fluid bed section and falling-rate periods of drying moving bed section, described falling-rate periods of drying moving bed section is positioned at the below of described constant rate of drying fluid bed section, described feeder II is connected with described constant rate of drying fluid bed section, and described discharger II is connected with described falling-rate periods of drying moving bed section.
10. the drying system of a kind of two-stage drying machine combination according to claim 9, it is characterized in that: described one-level pipe drier and described secondary fluidisation mobile bed drying machine are respectively equipped with deduster I and deduster II, described deduster I is connected with the tail end venting device of described tube drier, and the waste hot steam outlet of described secondary fluidisation mobile bed drying machine is connected by the heat source medium import of deduster II with described one-level pipe drier; The waste hot steam of described constant rate of drying fluid bed section and falling-rate periods of drying moving bed section output is after the dedusting of described deduster II, part waste hot steam returns to described gas distributor by cycle pressure device, and a part of waste hot steam is back to described one-level pipe drier as thermal source.
The drying system of 11. a kind of two-stage drying machine combinations according to claim 10, is characterized in that: described deduster is one or more tandem compounds in cyclone dust collectors, sack cleaner, electrostatic precipitator and wet scrubber.
The drying system of 12. a kind of two-stage drying machine combinations according to claim 9, is characterized in that: be provided with a material scarfier between described falling-rate periods of drying moving bed section and described discharger II.
The drying system of 13. a kind of two-stage drying machine combinations according to claim 9, is characterized in that: described constant rate of drying fluid bed section and described falling-rate periods of drying moving bed section are provided with at least one group of heat exchanger.
The drying system of 14. a kind of two-stage drying machine combinations according to claim 13, is characterized in that: described heat exchanger is one or more combinations in built-in heat exchanger, jacketed type exchanger, coil exchanger.
The drying system of 15. a kind of two-stage drying machine combinations according to claim 8, it is characterized in that: described feeder II is arranged on the top of described moving fluid bed drier, described discharger II is arranged on the bottom of described moving fluid bed drying device, is convenient to material to be dried and moves from the top down by gravity.
16. drying systems combined according to the arbitrary described a kind of two-stage drying machine of claim 9-14, it is characterized in that: be its critical moisture content through described constant rate of drying fluid bed section dried wet stock water capacity or there is certain downward shift with its critical moisture content, deviation range is within 20% of its critical moisture content.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| AU2014202422A AU2014202422A1 (en) | 2014-01-06 | 2014-05-02 | System for drying particulate materials |
| AU2014202422 | 2014-05-02 |
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| CN204555606U true CN204555606U (en) | 2015-08-12 |
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| CN201420843685.1U Active CN204555606U (en) | 2014-05-02 | 2014-12-26 | A kind of drying system of two-stage drying machine combination |
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| CN105466196A (en) * | 2015-12-25 | 2016-04-06 | 孙发喜 | Double-effect vacuum tube bundle drying system |
| CN106517727A (en) * | 2016-12-26 | 2017-03-22 | 南昌航空大学 | Sludge two-grade united energy-saving drying device and method |
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| CN111043845A (en) * | 2019-11-22 | 2020-04-21 | 宁夏新龙蓝天科技股份有限公司 | Novel vertical drying tower |
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| CN105466196A (en) * | 2015-12-25 | 2016-04-06 | 孙发喜 | Double-effect vacuum tube bundle drying system |
| CN105466196B (en) * | 2015-12-25 | 2018-01-19 | 郑州博大浓缩干燥设备有限公司 | Economic benefits and social benefits vacuum restrains drying system |
| CN106517727A (en) * | 2016-12-26 | 2017-03-22 | 南昌航空大学 | Sludge two-grade united energy-saving drying device and method |
| CN109605631A (en) * | 2018-12-12 | 2019-04-12 | 中国石油化工股份有限公司 | A kind of energy-saving rubber fluidisation blade integrated dry drying system |
| CN109605631B (en) * | 2018-12-12 | 2021-03-02 | 中国石油化工股份有限公司 | Energy-saving rubber fluidization paddle integration drying system |
| CN110657647A (en) * | 2019-10-23 | 2020-01-07 | 挪亚圣诺（太仓）生物科技有限公司 | Polyunsaturated fatty acid microcapsule drying system and drying process thereof |
| CN110657647B (en) * | 2019-10-23 | 2024-06-07 | 挪亚圣诺（太仓）生物科技有限公司 | Polyunsaturated fatty acid microcapsule drying system and drying process thereof |
| CN111504007A (en) * | 2020-04-29 | 2020-08-07 | 山东德曦环境科技有限公司 | Steam closed-loop pulsating movement combined drying system |
| CN114877627A (en) * | 2022-06-02 | 2022-08-09 | 沈阳爱科斯科技有限公司 | Vacuum low-temperature drying device |
| CN114877627B (en) * | 2022-06-02 | 2023-12-05 | 沈阳爱科斯科技有限公司 | Vacuum low-temperature drying device |
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