CN104110941B - The ciculation fluidized bed drying method of partial tail gas and equipment - Google Patents
The ciculation fluidized bed drying method of partial tail gas and equipment Download PDFInfo
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Abstract
The method and apparatus of partial tail gas recirculating fluidized bed drying, described method comprises the following steps: 1) dry materials; 2) circulation of tail gas; 3) exhaust emissions; 4) material cooling; 5) block material is separated, air after filtration, pressurize, be heated to the temperature required fluid bed dryer depth drying section that enters and carry out material depth drying, the self-fluidized type bed dryer depth drying section higher moisture content of temperature of discharging compared with low exhaust gas through dedusting, pressurization, heating laggard enter fluid bed dryer preliminarily dried section carry out material preliminarily dried, the fluid bed dryer preliminarily dried section temperature of discharging comparatively low moisture content comparatively high exhaust gas after dedusting, enter air; According to the equipment that the method for partial tail gas recirculating fluidized bed of the present invention drying builds, comprise fluid bed dryer body, first heater, secondary heating mechanism, cooling device, dust arrester.The invention has the beneficial effects as follows: make full use of drying medium heat energy, dry heat efficiency be high, reliable, energy-saving and emission-reduction continuously.
Description
Technical field
The present invention relates to the ciculation fluidized bed drying method of a kind of partial tail gas and equipment.
Background technology
Fluidized bed drying because of dry run gas-particle two-phase directly contact and vigorous fluidisation stir there is very large contact surface area, be that the aspects such as heat transfer, mass transfer, dry tenacity, the thermal efficiency are all advantageous, be widely used in the drying of the industry products such as chemical industry, medicine, food.
Traditional horizontal type fluidized-bed drying process is that wet stock self-fluidized type bed dryer one end adds, under the effect of heated drying medium, material one side fluidisation is while dehydrate, reach dry requirement through each hothouse successively, the product self-fluidized type bed dryer other end is discharged and is carried out package storage.Drying medium self-fluidized type bed dryer body air inlet of leaving the bed enters, and enters upper bed body, carries out fluidisation, drying, dehydration to wet stock, take away wet part through distribution grid pore, and tail gas self-fluidized type bed dryer top is discharged, after dedusting, enter air.This fluid bed dryer Mass and heat transfer is good, dry tenacity large, but there is the problems such as energy consumption is high, production cost is high.
For reducing fluidized bed drying process energy consumption, improve heat utilization rate, people have carried out a series of research.The first arranges interior heating tube in fluid bed dryer, indirect auxiliary heat supplying, reduces drying medium consumption, reduces power consumption, thermal energy consumption.It two is adopt the circulation of depth drying section high-temperature tail gas, makes full use of drying medium heat energy, reduces fluid bed dryer delivery temperature, reduces thermal energy consumption.
Document 1727-3080 (2005) 01-0036-04 proposes fluid bed dryer exhaust gas circulation process, the higher moisture content of temperature of fluid bed dryer depth drying section being discharged comparatively low exhaust gas recycles, directly send into fluid bed dryer preliminarily dried section with blower fan and carry out material preliminarily dried, the program considers the UTILIZATION OF VESIDUAL HEAT IN of high-temperature tail gas, save this part heat energy, comparatively be applicable to heat sensitive material drying, especially wet stock can not contact high-temperature gas and the later stage of drying material can bear the heat sensitive material of higher temperature relatively, fluid bed dryer preliminarily dried section EAT will be caused too low to the exhaust gas circulation process that general material is such, heat utilization rate is low, and corresponding power consumption increases, improper.
Chinese patent CN201867020U proposes a kind of circulation of tail gas fluid bed drying process, fluid bed dryer comprises multiple bringing-up section and cooling section, separate with dividing plate from top to bottom between each bringing-up section and cooling section, gas phase is separated completely, only below dividing plate, stay an osculum for Flow of Goods and Materials, rear one dryer section discharge the higher moisture content of temperature after dust separation, pressurization, heating, enter last dryer section for drying compared with low exhaust gas, the first dryer section discharge temperature comparatively low moisture content comparatively high exhaust gas enter air through dust removal process.This patent considers UTILIZATION OF VESIDUAL HEAT IN in dry run very well, but existing problems have, and one is that between each dryer section of fluid bed dryer, cooling section, gas phase is separated completely, and each dryer section, cooling section tolerance regulate and influenced each other very greatly, are difficult to normal operation; Two is that each section of gas loop exit is provided with cleaner, but undeclared recyclegas dust removal requirement, will cause that dust accumulates in the heater, sex change in running, increases vapor phase stream dynamic resistance, affects heat-transfer effect, be difficult to continuous operation.
Summary of the invention
In order to solve, current fluidized bed drying equipment heat-transfer effect is poor, heat utilization rate is low, be difficult to the problem of operation continuously, the present invention proposes one and make full use of drying medium heat energy, dry heat efficiency is high, the ciculation fluidized bed drying method of partial tail gas that are reliable, energy-saving and emission-reduction and equipment continuously.
The method of partial tail gas recirculating fluidized bed of the present invention drying, comprises the following steps:
1) dry materials:
Wet stock adds fluid bed dryer continuously by feed screw, after harrowing the dispersion of loose device, heating, fluidisation, preliminarily dried, enter each hothouse in the first Room successively continue fluidisation, heating, drying, dry materials to a certain extent, bed temperature reach 60 ~ 140 DEG C (determining according to material characteristic) enter cooling chamber be cooled gas cooling, after bed temperature reaches 40 ~ 60 DEG C, material enters block material separator by spiral discharging device and carries out the separation of block material, and qualified products are delivered to sack cleaner with gas and pack by being separated after being separated, store;
Isolated block of block material separator material is discharged from the first star discharger and is again processed;
The dust that in fluid bed dryer, dried gas is carried secretly is trapped afterwards by cloth bag and Product mix is packed, stored;
2) circulation of tail gas:
Air is through the first metre filter, second air blast pressurization, second heat exchanger be heated to 90 ~ 200 DEG C (determining according to material characteristic) laggard enter fluid bed dryer depth drying section second hot wind inlet carry out material depth drying, fluid bed dryer depth drying section produce temperature 60 ~ 120 DEG C of moisture contents comparatively low exhaust gas recycle, successively through bag-type dust, middle effect high efficiency particulate air filter filters, first air blast pressurization, First Heat Exchanger be heated to 90 ~ 200 DEG C (determining according to material characteristic) laggard enter fluid bed dryer preliminarily dried section first hot wind inlet, carry out material preliminarily dried,
3) exhaust emissions:
The temperature that fluid bed dryer preliminarily dried section produces 40 ~ 60 DEG C of moisture contents comparatively high exhaust gas through bag-type dust, air-introduced machine pressurization, enter air after water scrubber dedusting;
4) material cooling:
Air through the second metre filter, the 3rd air blast pressurization laggard enter the import of fluid bed dryer cold wind cooling material, cooled exhaust gas and depth drying tail gas mixing circulation in fluid bed dryer utilizes, successively through bag-type dust, middle effect high efficiency particulate air filter filter, first air blast pressurization, First Heat Exchanger be heated to temperature required laggard enter fluid bed dryer preliminarily dried section first hot wind inlet, for material preliminarily dried;
5) block material is separated:
Air enters block material separator and carries out the separation of block material after the second metre filter, the 3rd air blast pressurization, and block material is discharged from the first star discharger and again processed, and qualified products enter sack cleaner packaging, storage after being separated with separation gas.
According to the equipment that the method for partial tail gas recirculating fluidized bed of the present invention drying builds, it is characterized in that: comprise fluid bed dryer body, feed screw, first heater, secondary heating mechanism, cooling device, dust arrester, described fluid bed dryer body comprises upper bed body, body of leaving the bed, distribution grid, in the cavity that described distribution grid is arranged on upper bed body and body of leaving the bed is formed, adopt ligulate punching, opening is towards fluid bed dryer Way out; Described upper bed body top board is provided with and is provided with and the wet stock import of inner space and material outlet with the first row gas port of inner space and second exhaust port, sidewall; Described body of leaving the bed is provided with the first hot wind inlet, the second hot wind inlet and cold wind import; Described wet stock import is connected with the export pipeline of feed screw, and the first hot wind inlet, the second hot wind inlet are connected with the air outlet pipeline of corresponding first heater, secondary heating mechanism respectively, and cold wind import is communicated with the air outlet of cooling device; Described first row gas port is connected with the air inlet duct of dust arrester, second exhaust port is connected with the air inlet duct of first heater or described dust arrester; The gas outlet of described dust arrester is communicated with water scrubber by air-introduced machine; Described material outlet place is furnished with spiral discharging device, and the discharging opening of described spiral discharging device is communicated with the charging aperture of block material separator; The discharging opening of described block material separator outlet, described dust arrester is all furnished with star discharger;
The upper bed body inner chamber of described fluid bed dryer body is divided into low portion to hold concurrently as the solid phase area of cooling chamber, the gas phase zone on top, and described inner chamber becomes some hothouses by baffle for separating, the loose device of described first dry indoor location rake and/or internal heater, described internal heater is fixed on above the loose device of the first Room rake or internal heater and rake fall apart, and device is combined and rotates with harrowing the device that falls apart; Separate completely with the first circular arc dividing plate between described solid phase area one, two hothouse, separate with the first dividing plate between all the other each hothouses; Described top, gas phase zone second partition is separated into all hothouses in bottom, two regions and communicates or built-in cloth bag is installed in whole gas phase zone; Described body of leaving the bed becomes the some air chambers corresponding with upper bed body solid phase area, with the second circular arc type baffle for separating between one, two Room of body of wherein leaving the bed, with the 3rd baffle for separating between all the other each hothouses by baffle for separating;
Described first heater comprises middle effect high efficiency particulate air filter, the first air blast and First Heat Exchanger, described middle effect high efficiency particulate air filter air inlet is communicated with described second exhaust port or described dust arrester exhaust outlet, the air outlet of described middle effect high efficiency particulate air filter is communicated with the air inlet of the first described air blast, the gas outlet of the first described air blast is communicated with the air inlet of described First Heat Exchanger, and the gas outlet of described First Heat Exchanger is communicated with the first described hot wind inlet;
Described secondary heating mechanism comprises the first filter, the second air blast and the second heat exchanger, the air outlet of the first described filter is communicated with the air inlet of the second described air blast, the gas outlet of the second described air blast is communicated with the air inlet of the second described heat exchanger, and the gas outlet of the second described heat exchanger is communicated with the second described hot wind inlet;
Described cooling device comprises the second filter, the 3rd air blast, and the air outlet of the second described filter is communicated with the air inlet of the 3rd described air blast, the gas outlet of the 3rd described air blast and described cold wind inlet communication.
Described gas phase zone the first half is separated into preliminarily dried section by second partition and depth drying section two regions, the latter half communicate with all hothouses, and the dust arrester of whole fluid bed dryer configuration is external sack cleaner; Described external sack cleaner is that the first sack cleaner and the second sack cleaner are arranged on fluid bed dryer body exterior; Described first row gas port is connected with the air inlet pipeline of the second described sack cleaner, described second exhaust port is connected with the air inlet pipeline of the first described sack cleaner; The gas outlet of the first described sack cleaner is communicated with the air inlet of described middle effect high efficiency particulate air filter, the gas outlet of the second described sack cleaner is communicated with water scrubber by air-introduced machine.
Described gas phase zone upper space is provided with the built-in cloth bag of fluid bed, and gas phase zone card becomes two regions, left and right with upper part by the 4th baffle for separating, card communicates with all hothouses with the latter half, and the dust arrester of whole fluid bed dryer configuration is built-in sack cleaner; Described built-in sack cleaner is that the built-in cloth bag of fluid bed is directly fixed on fluid bed dryer bulk gas phase district upper space, and described second exhaust port is communicated with the air inlet of described middle effect high efficiency particulate air filter; The gas outlet of described block material separator is communicated with the air inlet of the 3rd sack cleaner; The air outlet of described first row gas port and the 3rd described sack cleaner is communicated with water scrubber by air-introduced machine.
Described middle effect high efficiency particulate air filter is furnished with the pressure difference test meter measuring filter inlet outlet pressure differential Δ P, wherein, if inlet outlet pressure differential Δ P slowly increases in continuous running, show that exhaust gas circulation system cloth bag is intact, in the middle of effect high efficiency particulate air filter inlet outlet pressure differential Δ P when being new install 2 ~ 10 times, preferably 2 ~ 5 times time suggestion cleaning in imitate high efficiency particulate air filter; If described middle effect high efficiency particulate air filter inlet outlet pressure differential Δ P occurs increasing exception suddenly in continuous running, show that exhaust gas circulation system cloth bag has breakage, exhaust gas circulation system cloth bag need be checked, in cleaning, imitate high efficiency particulate air filter.
Described fluid bed dryer body is provided with 2 ~ 20 hothouses, and wherein the first hothouse is circular, after a few room be horizontal multi-chamber fluidized bed dryer that is circular or rectangle.
Described preliminarily dried section and depth drying section gas ratio are 0.5:1 ~ 1:1, preferred 0.9:1 ~ 1:1; The height of the first described circular arc type dividing plate is 0.3 ~ 0.75 times of the first Room diameter; Described solid phase area is except one, two outdoors, and separate with the first dividing plate between all the other each rooms, the first divider height is 0.5 ~ 2 times of horizontal multi-cell fluidized bed distribution grid width, preferably 0.8 ~ 1.1 times; It is 50 ~ 200mm, preferably 80 ~ 120mm that first dividing plate lower end separates fabric swatch distance, is solid material passage.
Described gas phase zone the first half second partition is separated into two regions, and second partition height is 1/4 ~ 3/4 of upper bed body total height, and preferably 1/2 ~ 1/3.
Its thermal medium of described internal heater is steam, hot water, conduction oil, preferred water steam, hot water; Described First Heat Exchanger, the second heat exchanger thermal medium used are steam or conduction oil; Be made up of vapor heat exchanger and condensed water heat exchanger when described secondary heater take steam as thermal medium, gas first through condensed water preheating again by steam heated.
The invention has the beneficial effects as follows:
1, reasonably technological process and fluid bed dryer structure guarantee that drying system normally runs continuously
(1) fluid bed dryer first Room arranges and harrows in bulk putting, and disperses the first Room wet stock, the first Room material is not lumpd, lumps less;
(2) distribution grid adopts ligulate punching, and opening is towards fluid bed dryer material outlet direction, and pushing block material moves to outlet and discharges, and is not trapped in fluid bed dryer;
(3) drying machine upper bed body gas phase zone communicates, and ensures that each hothouse of fluid bed independently regulates tolerance;
(4) exhaust gas circulation system arranges middle effect high efficiency particulate air filter, prevents material from contacting high-temperature heat-exchanging, avoids the problem such as material sex change, heat exchanger obstruction, guarantee that system operates continuously for a long time;
2, take appropriate measures reduction thermal energy consumption, improves the thermal efficiency, realizes energy-saving and cost-reducing:
(1) the higher moisture content of temperature fluid bed dryer depth drying section produced comparatively low exhaust gas is sent into fluid bed dryer preliminarily dried section and is recycled after dedusting heating, makes full use of this part gas heat energy, improves dry heat efficiency;
(2) fluid bed dryer first Room arranges internal heater, indirect auxiliary heat supplying, reduces fluidizing air amount;
3) by internal heater auxiliary heat supplying and high temperature low moisture content gas cycling and reutilization, reduce dry system exhaust emissions temperature, reduce exhaust emissions total amount, realize energy-saving and emission-reduction.
Accompanying drawing explanation
Fig. 1 is partial tail gas recirculating fluidized bed drying technology process figure (external cloth bag technique) of the present invention.
Fig. 2 is that band of the present invention rake in bulkly puts horizontal multi-chamber fluidized bed dryer.
Fig. 3 is partial tail gas circulation internal heating fluidized bed drying technology flow chart (built-in cloth bag technique) of the present invention.
Fig. 4 is the horizontal multi-chamber fluidized bed dryer of built-in cloth bag of the present invention.
Fig. 5 is partial tail gas circulation internal heating fluidized bed drying technology flow chart (external cloth bag technique) of the present invention.
Fig. 6 is that band of the present invention rake in bulkly puts interior heated horizontal type multi-chamber fluidized bed dryer.
Fig. 7 is partial tail gas circulation internal heating fluidized bed drying technology flow chart (external cloth bag technique) of the present invention.
Fig. 8 is that band of the present invention rake in bulkly puts the horizontal multi-chamber fluidized bed dryer of the built-in cloth bag of interior heating.
Detailed description of the invention
The present invention is further illustrated below in conjunction with accompanying drawing
With reference to accompanying drawing:
The method of embodiment 1 partial tail gas recirculating fluidized bed of the present invention drying, comprises the following steps:
1) dry materials:
Wet stock adds fluid bed dryer continuously by feed screw, after harrowing the dispersion of loose device, heating, fluidisation, preliminarily dried, enter each hothouse in the first Room successively continue fluidisation, heating, drying, dry materials to a certain extent, bed temperature reach 125 ~ 135 DEG C enter cooling chamber be cooled gas cooling, after bed temperature reaches 45 ~ 55 DEG C, material enters block material separator by spiral discharging device and carries out the separation of block material, and qualified products are delivered to sack cleaner with gas and pack by being separated after being separated, store;
Isolated block of block material separator material is discharged from the first star discharger and is again processed;
The dust that in fluid bed dryer, dried gas is carried secretly is trapped afterwards by cloth bag and Product mix is packed, stored;
2) circulation of tail gas:
Air through the first metre filter, second air blast pressurization, the second heat exchanger be heated to 140 ~ 165 DEG C laggard enter fluid bed dryer depth drying section second hot wind inlet carry out material depth drying, fluid bed dryer depth drying section produce temperature 80 ~ 100 DEG C of moisture contents comparatively low exhaust gas recycle, successively through bag-type dust, middle effect high efficiency particulate air filter filter, first air blast pressurization, First Heat Exchanger be heated to 140 ~ 165 DEG C laggard enter fluid bed dryer preliminarily dried section first hot wind inlet, carry out material preliminarily dried;
3) exhaust emissions:
The temperature that fluid bed dryer preliminarily dried section produces 45 ~ 55 DEG C of moisture contents comparatively high exhaust gas through bag-type dust, air-introduced machine pressurization, enter air after water scrubber dedusting;
4) material cooling:
Air through the second metre filter, the 3rd air blast pressurization laggard enter the import of fluid bed dryer cold wind cooling material, cooled exhaust gas and depth drying tail gas mixing circulation in fluid bed dryer utilizes, successively through bag-type dust, middle effect high efficiency particulate air filter filter, first air blast pressurization, First Heat Exchanger be heated to temperature required laggard enter fluid bed dryer preliminarily dried section first hot wind inlet, for material preliminarily dried;
5) block material is separated:
Air enters block material separator and carries out the separation of block material after the second metre filter, the 3rd air blast pressurization, and block material is discharged from the first star discharger and again processed, and qualified products enter sack cleaner packaging, storage after being separated with separation gas.
The equipment that embodiment 2 builds according to the method for partial tail gas recirculating fluidized bed of the present invention drying, comprise fluid bed dryer body 02, feed screw 01, first heater, secondary heating mechanism, cooling device, dust arrester, described fluid bed dryer body 02 comprises upper bed body 31, body 37 of leaving the bed, distribution grid 36, described distribution grid 36 is arranged on upper bed body 31 and leaves the bed in the cavity of body 37 formation, adopt ligulate punching, opening is towards fluid bed dryer Way out; Described upper bed body 31 top board is provided with and is provided with and the wet stock import 34 of inner space and material outlet 22 with the first row gas port 30 of inner space and second exhaust port 28, sidewall; Described body 37 of leaving the bed is provided with the first hot wind inlet, the second hot wind inlet and cold wind import; Described wet stock import 34 is connected with the export pipeline of feed screw 01, first hot wind inlet 38, second hot wind inlet 39 is connected with the air outlet pipeline of corresponding first heater, secondary heating mechanism respectively, and cold wind import 42 is communicated with the air outlet of cooling device; Described first row gas port 30 is connected with the air inlet duct of dust arrester, second exhaust port 28 is connected with the air inlet duct of first heater or described dust arrester; The gas outlet of described dust arrester is communicated with water scrubber 10 by air-introduced machine 09; Described material outlet 22 place is furnished with spiral discharging device 04, and the discharging opening of described spiral discharging device 04 is communicated with the charging aperture of block material separator 03; Described block material separator 03 exports, the discharging opening of described dust arrester is all furnished with star discharger 05,07;
Upper bed body 31 inner chamber of described fluid bed dryer body 02 is divided into low portion to hold concurrently as the solid phase area 24 of cooling chamber 23, the gas phase zone 27 on top, and described inner chamber becomes some hothouses by baffle for separating, the described first loose device 35 of dry indoor location rake and/or internal heater 45, described internal heater 45 is fixed on above the loose device 35 of the first Room rake or internal heater 45 is combined with the loose device 35 of rake and rotates with harrowing loose device; Separate completely with the first circular arc dividing plate 33 between described solid phase area 24 1, two hothouse, separate with the first dividing plate 25 between all the other each hothouses; Described top, gas phase zone 27 second partition 29 is separated into two regions, and all hothouse in bottom communicates or built-in cloth bag 19 is installed in whole gas phase zone; Described body 37 of leaving the bed becomes the some air chambers corresponding with upper bed body 31 solid phase area by baffle for separating, separates, separate between all the other each hothouses with the 3rd dividing plate 41 between one, two Room of body 37 of wherein leaving the bed with the second circular arc type dividing plate 39;
Described first heater comprises middle effect high efficiency particulate air filter 11, first air blast 14 and First Heat Exchanger 17, described middle effect high efficiency particulate air filter 11 air inlet is communicated with described second exhaust port 28 or described dust arrester 06 exhaust outlet, the air outlet of described middle effect high efficiency particulate air filter 11 is communicated with the air inlet of the first described air blast 14, the gas outlet of the first described air blast 14 is communicated with the air inlet of described First Heat Exchanger 17, and the gas outlet of described First Heat Exchanger 17 is communicated with the first described hot wind inlet 38;
Described secondary heating mechanism comprises the first filter 12, second air blast 15 and the second heat exchanger 18, the air outlet of the first described filter 12 is communicated with the air inlet of the second described air blast 15, the gas outlet of the second described air blast 15 is communicated with the air inlet of the second described heat exchanger 18, and the gas outlet of the second described heat exchanger 18 is communicated with the second described hot wind inlet 40;
Described cooling device comprises the second filter 13, the 3rd air blast 16, and the air outlet of the second described filter 13 is communicated with the air inlet of the 3rd described air blast 16, the gas outlet of the 3rd described air blast 16 is communicated with described cold wind import 42.
Described gas phase zone 27 the first half is separated into preliminarily dried section 32 by second partition 29 and depth drying section 26 two regions, the latter half communicate with all hothouses, and the dust arrester of whole fluid bed dryer configuration is external sack cleaner; Described external sack cleaner is that the first sack cleaner 06 and the second sack cleaner 08 are arranged on fluid bed dryer body 02 outside; Described first row gas port 30 is connected with the air inlet pipeline of the second described sack cleaner 08, described second exhaust port 28 is connected with the air inlet pipeline of the first described sack cleaner 06; The gas outlet of the first described sack cleaner 06 is communicated with the air inlet of described middle effect high efficiency particulate air filter 11, the gas outlet of the second described sack cleaner 08 is communicated with water scrubber 10 by air-introduced machine 09.
Described gas phase zone 27 upper space is provided with the built-in cloth bag 19 of fluid bed, and gas phase zone card 44 is separated into two regions, left and right with upper part by the 4th dividing plate 43, card 44 communicates with all hothouses with the latter half, and the dust arrester of whole fluid bed dryer configuration is built-in sack cleaner; Described built-in sack cleaner is that the built-in cloth bag of fluid bed is directly fixed on fluid bed dryer body 02 gas phase zone upper space, and described second exhaust port is communicated with the air inlet of described middle effect high efficiency particulate air filter; The gas outlet of described block material separator is communicated with the air inlet of the 3rd sack cleaner; The air outlet of described first row gas port and the 3rd described sack cleaner is communicated with water scrubber by air-introduced machine.
Described middle effect high efficiency particulate air filter 11 is furnished with the pressure difference test meter measuring filter inlet outlet pressure differential Δ P, wherein, if inlet outlet pressure differential Δ P slowly increases in continuous running, show that exhaust gas circulation system cloth bag is intact, in the middle of effect high efficiency particulate air filter inlet outlet pressure differential Δ P when being new install 2 ~ 10 times, preferably 2 ~ 5 times time suggestion cleaning in imitate high efficiency particulate air filter; If described middle effect high efficiency particulate air filter inlet outlet pressure differential Δ P occurs increasing exception suddenly in continuous running, show that exhaust gas circulation system cloth bag has breakage, exhaust gas circulation system cloth bag need be checked, in cleaning, imitate high efficiency particulate air filter.
Described fluid bed dryer body is provided with 2 ~ 20 hothouses, and wherein the first hothouse is circular, after a few room be horizontal multi-chamber fluidized bed dryer that is circular or rectangle.
Described preliminarily dried section 32 is 0.5:1 ~ 1:1 with depth drying section 26 by gas ratio, preferential 0.9:1 ~ 1:1; The height of the first described circular arc type dividing plate is 0.3 ~ 0.75 times of the first Room diameter; Described solid phase area is except one, two outdoors, and separate with the first dividing plate between all the other each rooms, the first divider height is 0.5 ~ 2 times of horizontal multi-cell fluidized bed distribution grid width, preferably 0.8 ~ 1.1 times; It is 50 ~ 200mm, preferably 80 ~ 120mm that first dividing plate lower end separates fabric swatch distance, is solid material passage.
Described gas phase zone the first half second partition is separated into two regions, and second partition height is 1/4 ~ 3/4 of upper bed body total height, and preferably 1/2 ~ 1/3.
Described its thermal medium of internal heater 45 is steam, hot water, conduction oil, preferred water steam, hot water; Described First Heat Exchanger, the second heat exchanger thermal medium used are steam or conduction oil; Be made up of vapor heat exchanger and condensed water heat exchanger when described secondary heater take steam as thermal medium, gas first through condensed water preheating again by steam heated.
Embodiment 3 (1) accompanying drawing 1 partial tail gas recirculating fluidized bed drying technology process figure (external cloth bag technique)
Material flow: wet stock adds fluid bed dryer 02 continuously by feed screw 01, enter each hothouse successively loose device 35 disperses through harrowing in the first Room, after hot air fluidised, preliminarily dried and continue fluidisation, heating, drying, dry materials to a certain extent, bed temperature reach 125 ~ 135 DEG C enter cooling chamber 23 be cooled gas cooling, bed temperature reaches 45 ~ 55 DEG C, material enters block material separator 03 by spiral discharging device 04 and carries out the separation of block material, and qualified products are delivered to the first sack cleaner 06 with gas pack, store through the second star discharger 07 by being separated.
Block material separator 03 isolated block material is discharged from the first star discharger 05 and is again processed.
The dust that dust is trapped by the first sack cleaner 06, the dried gas of preliminarily dried section 32 is carried secretly that the dried gas of fluid bed dryer 02 depth drying section 26 is carried secretly is trapped by the second sack cleaner 08, and two tunnel trapping dust are all incorporated to product and pack through the second star discharger 07, store.
Dry gas flow process: air filters through the first filter 12, second air blast 15 pressurizes, second heat exchanger 18 is heated to 140 ~ 165 DEG C and enters fluid bed dryer 02 depth drying section 26 second hot wind inlet 40 and carry out material depth drying, fluid bed dryer 02 depth drying section 26 produce temperature 80 ~ 100 DEG C of moisture contents comparatively low exhaust gas recycle, successively through the first sack cleaner 06 dedusting, middle effect high efficiency particulate air filter 11 filters, first air blast 14 pressurizes, First Heat Exchanger 17 is heated to 140 ~ 165 DEG C and enters fluid bed dryer 02 preliminarily dried section 32 first hot wind inlet 38, carry out material preliminarily dried.Comparatively high exhaust gas is through the second sack cleaner 08 dedusting at 45 ~ 55 DEG C of moisture contents for fluid bed dryer 02 preliminarily dried section 32 temperature of discharging, and air-introduced machine 09 pressurizes, enter air after water scrubber 10 dedusting.
Cooling and block material divided gas flow flow process: point two-way after air filters through the second filter 13, the 3rd air blast 16 pressurizes:
One tunnel enters fluid bed dryer 02 cold wind import 42 and cools material, cooled exhaust gas and depth drying tail gas mixing circulation in fluid bed dryer 02 utilizes, successively through the first sack cleaner 06 dedusting, middle effect high efficiency particulate air filter 11 filters, the first air blast 14 pressurizes, First Heat Exchanger 17 is heated to 140 ~ 165 DEG C and enters fluid bed dryer 02 preliminarily dried section 32 first hot wind inlet 38, for material preliminarily dried.
Another road enters block material separator 03 and carries out the separation of block material, block material is discharged from the first star discharger 05 and is again processed, qualified products enter the first sack cleaner 06 with separation gas and pack through the second star discharger 07, storage, the separation tail gas mixing circulation that a tail gas part is discharged through the first sack cleaner 06 and fluid bed dryer 02 second exhaust port 28 utilizes, imitate high efficiency particulate air filter 11 in warp successively to filter, first air blast 14 pressurizes, First Heat Exchanger 17 is heated to 140 ~ 165 DEG C and enters fluid bed dryer 02 preliminarily dried section 32 first hot wind inlet 38, for material preliminarily dried.Another part is discharged tail gas through the second sack cleaner 08 with fluid bed dryer 02 first row gas port 30 and is mixed, and pressurizes, enters air after water scrubber 10 dedusting through air-introduced machine 09.
(2) accompanying drawing 3 partial tail gas recirculating fluidized bed drying technology process figure (built-in cloth bag technique)
Material flow: wet stock adds fluid bed dryer 02 continuously by feed screw 01, enter each hothouse successively loose device 35 disperses through harrowing in the first Room, after hot air fluidised, preliminarily dried and continue fluidisation, heating, drying, dry materials to a certain extent, bed temperature reach 125 ~ 135 DEG C enter cooling chamber 23 be cooled gas cooling, bed temperature reaches 45 ~ 55 DEG C, material enters block material separator 03 by spiral discharging device 04 and carries out the separation of block material, and qualified products are delivered to the 3rd sack cleaner 20 with gas pack, store through asterism discharger 21 by being separated.
Block material separator 03 isolated block material is discharged from the first star discharger 05 and is again processed.
The dust that in fluid bed dryer 02, dried gas is carried secretly is trapped by the built-in cloth bag 19 of fluid bed and returns in fluid bed dryer 02, enter block material separator 03 through spiral discharging device 04 together with main body material, be delivered to the 3rd sack cleaner 20 by separation gas and pack through asterism discharger 21, store.
Dry gas flow process: air filters through the first filter 12, second air blast 15 pressurizes, second heat exchanger 18 is heated to 140 ~ 165 DEG C and enters fluid bed dryer 02 depth drying section 26 second hot wind inlet 40 and carry out material depth drying, the temperature that fluid bed dryer 02 depth drying section 26 produces recycles from second exhaust port 28 discharge through the dedusting of fluid bed built-in cloth bag 19 compared with low exhaust gas at 80 ~ 100 DEG C of moisture contents, imitate high efficiency particulate air filter 11 in warp successively to filter, first air blast 14 pressurizes, First Heat Exchanger 17 is heated to 140 ~ 165 DEG C and enters fluid bed dryer 02 preliminarily dried section 32 first hot wind inlet 38, carry out material preliminarily dried.The temperature that fluid bed dryer 02 preliminarily dried section 32 produces is discharged from first row gas port 30 through the dedusting of fluid bed built-in cloth bag 19 compared with high exhaust gas at 45 ~ 55 DEG C of moisture contents, pressurizes, enters air after water scrubber 10 dedusting through air-introduced machine 09.
Cooling and block material divided gas flow flow process: point two-way after air filters through the second filter 13, the 3rd air blast 16 pressurizes:
One tunnel enters fluid bed dryer 02 cold wind import 42 and cools material, cooled exhaust gas and depth drying tail gas mix to discharge from second exhaust port 28 through the dedusting of fluid bed built-in cloth bag 19 and recycle in fluid bed dryer 02, successively through in imitate that high efficiency particulate air filter 11 filters, the first air blast 14 pressurizes, First Heat Exchanger 17 is heated to 140 ~ 165 DEG C and enters fluid bed dryer 02 preliminarily dried section 32 first hot wind inlet 38, for material preliminarily dried.
Another road enters block material separator 03 and carries out the separation of block material, block material is discharged from the first star discharger 05 and is again processed, qualified products enter the 3rd sack cleaner 20 with separation gas and pack through the 3rd sack cleaner 21, store, after separation of products tail gas and fluid bed dryer 02 first row gas port 30 discharge temperature comparatively low moisture content comparatively high exhaust gas mix and pressurize through air-introduced machine 09, enter air after water scrubber 10 dedusting.
(3) accompanying drawing 5 partial tail gas circulation internal heating fluidized bed drying technology flow chart (external cloth bag technique)
Material flow: wet stock adds fluid bed dryer 02 continuously by feed screw 01, disperse through harrowing loose device 35 in the first Room, internal heater 45 auxiliary heat supplying, hot air fluidised, enter each hothouse after preliminarily dried successively and continue fluidisation, heating, dry, dry materials to a certain extent, bed temperature reach 125 ~ 135 DEG C enter cooling chamber 23 be cooled gas cooling, bed temperature reaches 45 ~ 55 DEG C, material enters block material separator 03 by spiral discharging device 04 and carries out the separation of block material, qualified products are delivered to the first sack cleaner 06 with gas pack through the second star discharger 07 by being separated, storage.
Block material separator 03 isolated block material is discharged from the first star discharger 05 and is again processed.
The dust that dust is trapped by the first sack cleaner 06, the dried gas of preliminarily dried section 32 is carried secretly that the dried gas of fluid bed dryer 02 depth drying section 26 is carried secretly is trapped by the second sack cleaner 08, and two tunnel trapping dust are all incorporated to product and pack through the second star discharger 07, store.
Dry gas flow process: air filters through the first filter 12, second air blast 15 pressurizes, second heat exchanger 18 is heated to 140 ~ 165 DEG C and enters fluid bed dryer 02 depth drying section 26 second hot wind inlet 40 and carry out material depth drying, fluid bed dryer 02 depth drying section 26 produce temperature 80 ~ 100 DEG C of moisture contents comparatively low exhaust gas recycle, successively through the first sack cleaner 06 dedusting, middle effect high efficiency particulate air filter 11 filters, first air blast 14 pressurizes, First Heat Exchanger 17 is heated to 140 ~ 165 DEG C and enters fluid bed dryer 02 preliminarily dried section 32 first hot wind inlet 38, carry out material preliminarily dried.Comparatively high exhaust gas is through the second sack cleaner 08 dedusting at 45 ~ 55 DEG C of moisture contents for fluid bed dryer 02 preliminarily dried section 32 temperature of discharging, and air-introduced machine 09 pressurizes, enter air after water scrubber 10 dedusting.
Cooling and block material divided gas flow flow process: point two-way after air filters through the second filter 13, the 3rd air blast 16 pressurizes:
One tunnel enters fluid bed dryer 02 cold wind import 42 and cools material, cooled exhaust gas depth drying tail gas utilizes with mixing circulation in fluid bed dryer 02, successively through the first sack cleaner 06 dedusting, middle effect high efficiency particulate air filter 11 filters, the first air blast 14 pressurizes, First Heat Exchanger 17 is heated to 140 ~ 165 DEG C and enters fluid bed dryer 02 preliminarily dried section 32 first hot wind inlet 38, for material preliminarily dried.
Another road enters block material separator 03 and carries out the separation of block material, block material is discharged from the first star discharger 05 and is again processed, qualified products enter the first sack cleaner 06 with separation gas and pack through the second star discharger 07, storage, the separation tail gas mixing circulation that a tail gas part is discharged through the first sack cleaner 06 and fluid bed dryer 02 second exhaust port 28 utilizes, imitate high efficiency particulate air filter 11 in warp successively to filter, first air blast 14 pressurizes, First Heat Exchanger 17 is heated to 140 ~ 165 DEG C and enters fluid bed dryer 02 preliminarily dried section 32 first hot wind inlet 38, for material preliminarily dried.Another part is discharged tail gas through the second sack cleaner 08 with fluid bed dryer 02 first row gas port 30 and is mixed, and pressurizes, enters air after water scrubber 10 dedusting through air-introduced machine 09.
(4) accompanying drawing 7 partial tail gas circulation internal heating fluidized bed drying technology flow chart (built-in cloth bag technique)
Material flow: wet stock adds fluid bed dryer 02 continuously by feed screw 01, disperse through harrowing loose device 35 in the first Room, internal heater 45 auxiliary heat supplying, hot air fluidised, enter each hothouse after preliminarily dried successively and continue fluidisation, heating, dry, dry materials to a certain extent, bed temperature reach 125 ~ 165 DEG C enter cooling chamber 23 be cooled gas cooling, bed temperature reaches 45 ~ 55 DEG C of materials and enters block material separator 03 by spiral discharging device 04 and carry out the separation of block material, qualified products are delivered to the 3rd sack cleaner 20 through asterism discharger 21 package storage by being separated with gas.
Block material separator 03 isolated block material is discharged from the first star discharger 05 and is again processed.
The dust that in fluid bed dryer 02, dried gas is carried secretly is trapped by the built-in cloth bag 19 of fluid bed and returns in fluid bed dryer 02, enter block material separator 03 through spiral discharging device 04 together with main body material, be delivered to the 3rd sack cleaner 20 by separation gas and pack through asterism discharger 21, store.
Dry gas flow process: air filters through the first filter 12, second air blast 15 pressurizes, second heat exchanger 18 is heated to 140 ~ 165 DEG C and enters fluid bed dryer 02 depth drying section 26 second hot wind inlet 40 and carry out material depth drying, the temperature that fluid bed dryer 02 depth drying section 26 produces recycles from second exhaust port 28 discharge through the dedusting of fluid bed built-in cloth bag 19 compared with low exhaust gas at 80 ~ 100 DEG C of moisture contents, imitate high efficiency particulate air filter 11 in warp successively to filter, first air blast 14 pressurizes, First Heat Exchanger 17 is heated to 140 ~ 165 DEG C and enters fluid bed dryer 02 preliminarily dried section 32 first hot wind inlet 38 and carry out material preliminarily dried.The temperature that fluid bed dryer 02 preliminarily dried section 32 produces is discharged from first row gas port 30 through the dedusting of fluid bed built-in cloth bag 19 compared with high exhaust gas at 45 ~ 55 DEG C of moisture contents, pressurizes, enters air after water scrubber 10 dedusting through air-introduced machine 09.
Cooling and block material divided gas flow flow process:
Point two-way after air filters through the second filter 13, the 3rd air blast 16 pressurizes:
One tunnel enters fluid bed dryer 02 cold wind import 42 and cools material, cooled exhaust gas and depth drying tail gas mix to discharge from second exhaust port 28 through the dedusting of fluid bed built-in cloth bag 19 and recycle in fluid bed dryer 02, successively through in imitate that high efficiency particulate air filter 11 filters, the first air blast 14 pressurizes, First Heat Exchanger 17 is heated to 140 ~ 165 DEG C and enters fluid bed dryer 02 preliminarily dried section 32 first hot wind inlet 38, for material preliminarily dried.
Another road enters block material separator 03 and carries out the separation of block material, block material is discharged from the first star discharger 05 and is again processed, qualified products enter the 3rd sack cleaner 20 with separation gas and pack through the 3rd sack cleaner 21, store, after separation of products tail gas and fluid bed dryer 02 first row gas port 30 discharge temperature comparatively low moisture content comparatively high exhaust gas mix and pressurize through air-introduced machine 09, enter air after water scrubber 10 dedusting.
Embodiment 4 is with rake horizontal multi-chamber fluidized bed dryer (Fig. 2) first Room of putting in bulk for circular, and be provided with the loose device 35 of rake, the loose device 35 of rake rotates by certain rotating speed, disperses the first Room wet stock, after a few room be circle or rectangle.Band rake is in bulk puts horizontal multi-chamber fluidized bed dryer by upper bed body 31, body 37 of leaving the bed, and distribution grid 36 forms; Upper bed body 31 points of solid phase area 24 and gas phase zone 27; Separate completely with the first circular arc dividing plate 33 between Room, solid phase area 24 1, two, first circular arc dividing plate 33 is highly 0.5 times of the first Room diameter, material enters the second Room by overflow from the first Room, separate with the first dividing plate 25 between all the other each rooms, first dividing plate 25 lower end separates fabric swatch 36 apart from being 110mm, for solid material passage, the first dividing plate 25 is highly 1 times of horizontal multi-cell fluidized bed distribution grid 36 width; Fluid bed dryer gas phase zone 27 the first half is separated into two regions by second partition 29, and the gas phase zone 27 whole fluid bed dryer of the latter half communicates, and facilitates each hothouse tolerance to regulate; With dividing plate just fluid bed dryer body 37 of leaving the bed be separated into the some air chambers corresponding with upper bed body 31 solid phase area 24, one, separate with the second circular arc type dividing plate 39 between two Room, separate with the 3rd dividing plate 41 between all the other each rooms, tolerance can be regulated by each hothouse specific requirement; Distribution grid 36 adopts ligulate punching, and the block material in fluid bed dryer, towards fluid bed dryer material outlet direction, is pushed to outlet by opening, convenient discharge.
Embodiment 5 is with the rake horizontal multi-chamber fluidized bed dryer of built-in cloth bag (Fig. 4) first Room of putting in bulk for circular, and be provided with the loose device 35 of rake, the loose device 35 of rake rotates by certain rotating speed, disperses the first Room wet stock, after a few room be circle or rectangle.The band rake horizontal multi-chamber fluidized bed dryer of built-in cloth bag of putting in bulk is by upper bed body 31, body 37 of leaving the bed, and distribution grid 36 forms; Upper bed body 31 points of solid phase area 24 and gas phase zone 27; Separate completely with the first circular arc dividing plate 33 between Room, solid phase area 24 1, two, first circular arc dividing plate 33 is highly 0.5 times of the first Room diameter, material enters the second Room by overflow from the first Room, separated with the first dividing plate 25 between all the other each rooms, first dividing plate 25 lower end separates fabric swatch 36 apart from being 110mm, for solid material passage, the first dividing plate 25 is highly 1 times of horizontal multi-cell fluidized bed distribution grid 36 width; Gas phase zone 27 upper space is provided with the built-in cloth bag 19 of fluid bed, the band dust tail gas that fluid bed dryer produces leaves drying machine after the dedusting of fluid bed built-in cloth bag 19, gas phase zone 27 card more than 44 partial division is become two regions by the 4th dividing plate 43, card 44 communicates with the whole fluid bed dryer of the latter half, facilitates each hothouse tolerance to regulate; Be separated into the some air chambers corresponding with upper bed body 31 solid phase area 24 with dividing plate body 37 of being left the bed by fluid bed dryer, between one, two Room, second separates with circular arc type dividing plate 39, separates between all the other each rooms with the 3rd dividing plate 41, can regulate tolerance by each hothouse specific requirement; Distribution grid 36 adopts ligulate punching, and block material in fluid bed dryer, towards fluid bed dryer material outlet direction, is pushed to outlet by opening, convenient discharge.
Embodiment 6 band rake is in bulk puts interior heated horizontal type multi-chamber fluidized bed dryer (Fig. 6) first Room for circular, and be provided with and harrow fall apart device 35 and internal heater 45, the loose device 35 of rake, by certain rotating speed rotation, disperses the first Room wet stock, internal heater 45 can be fixedly mounted on the first locular wall face or be combined and installed together with the loose device 35 of rake and to rotate with harrow loose device 35, for the first Room auxiliary heat supplying, and saving fluidisation gas consumption, a few room can be circular or rectangle below, band rake is in bulk puts interior heated horizontal type multi-chamber fluidized bed dryer by upper bed body 31, to leave the bed body 37, distribution grid 36 forms, upper bed body 31 points of solid phase area 24 and gas phase zone 27, solid phase area 24 1, separate completely with the first circular arc dividing plate 33 between two Room, first circular arc dividing plate 33 is highly 0.5 times of the first Room diameter, material enters the second Room by overflow from the first Room, separate with the first dividing plate 25 between all the other each rooms, first dividing plate 25 lower end separates fabric swatch 36 apart from being 110mm, for solid material passage, first dividing plate 25 is highly 1 times of horizontal multi-cell fluidized bed distribution grid 36 width, fluid bed dryer gas phase zone 27 the first half is separated into two regions by second partition 29, and the gas phase zone 27 whole fluid bed dryer of the latter half communicates, and facilitates each hothouse tolerance to regulate, be separated into the some air chambers corresponding with upper bed body 31 solid phase area 24 with dividing plate body 37 of being left the bed by fluid bed dryer, separate with the second circular arc type dividing plate 39 between one, two Room, separate with the 3rd dividing plate 41 between all the other each rooms, tolerance can be regulated by each hothouse specific requirement, distribution grid 36 adopts ligulate punching, and block material in fluid bed dryer, towards fluid bed dryer material outlet direction, is pushed to outlet by opening, convenient discharge.
Embodiment 7 is with the rake horizontal multi-chamber fluidized bed dryer of the built-in cloth bag of interior heating (Fig. 8) first Room of putting in bulk for circular, and be provided with the loose device 35 of rake and internal heater 45, the loose device 35 of rake rotates by certain rotating speed, disperses the first Room wet stock, internal heater 45 can be fixedly mounted on the first locular wall face or be combined and installed together with the loose device 35 of rake and to rotate with harrow loose device 35, for the first Room auxiliary heat supplying, and saving fluidisation gas consumption, a few room can be circular or rectangle below, the band rake horizontal multi-chamber fluidized bed dryer of the built-in cloth bag of interior heating of putting in bulk is by upper bed body 31, to leave the bed body 37, distribution grid 36 forms, upper bed body 31 points of solid phase area 24 and gas phase zone 27, solid phase area 24 1, separate completely with the first circular arc dividing plate 33 between two Room, first circular arc dividing plate 33 is highly 0.5 times of the first Room diameter, material enters the second Room by overflow from the first Room, separate with the first dividing plate 25 between all the other each rooms, first dividing plate 25 lower end separates fabric swatch 36 apart from being 110mm, for solid material passage, first dividing plate 25 is highly 1 times of horizontal multi-cell fluidized bed distribution grid 36 width, gas phase zone 27 the first half is provided with the built-in cloth bag 19 of fluid bed, and the band dust tail gas that fluid bed dryer produces leaves drying machine after the dedusting of fluid bed built-in cloth bag 19, the whole fluid bed dryer in gas phase zone 27 communicates, and facilitates each hothouse tolerance to regulate, be separated into the some air chambers corresponding with upper bed body 31 solid phase area 24 with dividing plate body 37 of being left the bed by fluid bed dryer, separate with the second circular arc type dividing plate 39 between one, two Room, separate with the 3rd dividing plate 41 between all the other each rooms, tolerance can be regulated by each hothouse specific requirement, distribution grid 36 adopts ligulate punching, and block material in fluid bed dryer, towards fluid bed dryer material outlet direction, can be pushed to outlet by opening, convenient discharge.
Content described in this description embodiment is only enumerating the way of realization of inventive concept; protection scope of the present invention should not be regarded as being only limitted to the concrete form that embodiment is stated, protection scope of the present invention also comprises those skilled in the art and conceives the equivalent technologies means that can expect according to the present invention.
Claims (9)
1. the method for partial tail gas recirculating fluidized bed drying, comprises the following steps:
1) dry materials:
Wet stock adds fluid bed dryer continuously by feed screw, after harrowing the dispersion of loose device, heating, fluidisation, preliminarily dried, enter each hothouse in the first Room successively continue fluidisation, heating, drying, dry materials to a certain extent, bed temperature reach 60 ~ 140 DEG C enter cooling chamber be cooled gas cooling, after bed temperature is cooled to 40 ~ 60 DEG C, material enters block material separator by spiral discharging device and carries out the separation of block material, and qualified products are delivered to sack cleaner with gas and pack by being separated after being separated, store;
Isolated block of block material separator material is discharged from the first star discharger and is again processed;
The dust that in fluid bed dryer, dried gas is carried secretly is trapped afterwards by cloth bag and Product mix is packed, stored;
2) circulation of tail gas:
Air through the first metre filter, second air blast pressurization, the second heat exchanger be heated to 90 ~ 200 DEG C laggard enter fluid bed dryer depth drying section second hot wind inlet carry out material depth drying, fluid bed dryer depth drying section produce temperature 60 ~ 120 DEG C of moisture contents comparatively low exhaust gas recycle, successively through bag-type dust, middle effect high efficiency particulate air filter filter, first air blast pressurization, First Heat Exchanger be heated to 90 ~ 200 DEG C laggard enter fluid bed dryer preliminarily dried section first hot wind inlet, carry out material preliminarily dried;
3) exhaust emissions:
The temperature that fluid bed dryer preliminarily dried section produces 40 ~ 60 DEG C of moisture contents comparatively high exhaust gas through bag-type dust, air-introduced machine pressurization, enter air after water scrubber dedusting;
4) material cooling:
Air through the second metre filter, the 3rd air blast pressurization laggard enter the import of fluid bed dryer cold wind cooling material, cooled exhaust gas and depth drying tail gas mixing circulation in fluid bed dryer utilizes, successively through bag-type dust, middle effect high efficiency particulate air filter filter, first air blast pressurization, First Heat Exchanger be heated to temperature required laggard enter fluid bed dryer preliminarily dried section first hot wind inlet, for material preliminarily dried;
5) block material is separated:
Air enters block material separator and carries out the separation of block material after the second metre filter, the 3rd air blast pressurization, and block material is discharged from the first star discharger and again processed, and qualified products enter sack cleaner packaging, storage after being separated with separation gas.
2. according to the equipment that the method for partial tail gas recirculating fluidized bed according to claim 1 drying builds, it is characterized in that: comprise fluid bed dryer body, feed screw, first heater, secondary heating mechanism, cooling device, dust arrester, described fluid bed dryer body comprises upper bed body, body of leaving the bed, distribution grid, in the cavity that described distribution grid is arranged on upper bed body and body of leaving the bed is formed, adopt ligulate punching, opening is towards fluid bed dryer Way out; Described upper bed body top board is provided with and is provided with and the wet stock import of inner space and material outlet with the first row gas port of inner space and second exhaust port, sidewall; Described body of leaving the bed is provided with the first hot wind inlet, the second hot wind inlet and cold wind import; Described wet stock import is connected with the export pipeline of feed screw, and the first hot wind inlet, the second hot wind inlet are connected with the air outlet pipeline of corresponding first heater, secondary heating mechanism respectively, and cold wind import is communicated with the air outlet of cooling device; Described first row gas port is connected with the air inlet duct of dust arrester, second exhaust port is connected with the air inlet duct of first heater or described dust arrester; The gas outlet of described dust arrester is communicated with water scrubber by air-introduced machine; Described material outlet place is furnished with spiral discharging device, and the discharging opening of described spiral discharging device is communicated with the charging aperture of block material separator; The discharging opening of described block material separator outlet, described dust arrester is all furnished with star discharger;
The upper bed body inner chamber of described fluid bed dryer body is divided into low portion to hold concurrently as the solid phase area of cooling chamber, the gas phase zone on top, and described inner chamber becomes some hothouses by baffle for separating, the loose device of described first dry indoor location rake and/or internal heater, described internal heater is fixed on above the loose device of the first Room rake or internal heater and rake fall apart, and device is combined and rotates with harrowing the device that falls apart; Separate completely with the first circular arc dividing plate between described solid phase area one, two hothouse, separate with the first dividing plate between all the other each hothouses; Described top, gas phase zone second partition is separated into two regions, and all hothouse in bottom communicates or built-in cloth bag is installed in whole gas phase zone; Described body of leaving the bed becomes the some air chambers corresponding with upper bed body solid phase area, with the second circular arc type baffle for separating between one, two Room of body of wherein leaving the bed, with the 3rd baffle for separating between all the other each hothouses by baffle for separating;
Described first heater comprises middle effect high efficiency particulate air filter, the first air blast and First Heat Exchanger, described middle effect high efficiency particulate air filter air inlet is communicated with described second exhaust port or described dust arrester exhaust outlet, the air outlet of described middle effect high efficiency particulate air filter is communicated with the air inlet of the first described air blast, the gas outlet of the first described air blast is communicated with the air inlet of described First Heat Exchanger, and the gas outlet of described First Heat Exchanger is communicated with the first described hot wind inlet;
Described secondary heating mechanism comprises the first filter, the second air blast and the second heat exchanger, the air outlet of the first described filter is communicated with the air inlet of the second described air blast, the gas outlet of the second described air blast is communicated with the air inlet of the second described heat exchanger, and the gas outlet of the second described heat exchanger is communicated with the second described hot wind inlet;
Described cooling device comprises the second filter, the 3rd air blast, and the air outlet of the second described filter is communicated with the air inlet of the 3rd described air blast, the gas outlet of the 3rd described air blast and described cold wind inlet communication.
3. equipment as claimed in claim 2, it is characterized in that: described gas phase zone the first half is separated into preliminarily dried section by second partition and depth drying section two regions, the latter half communicate with all hothouses, the dust arrester of whole fluid bed dryer configuration is external sack cleaner; Described external sack cleaner is that the first sack cleaner and the second sack cleaner are arranged on fluid bed dryer body exterior; Described first row gas port is connected with the air inlet pipeline of the second described sack cleaner, described second exhaust port is connected with the air inlet pipeline of the first described sack cleaner; The gas outlet of the first described sack cleaner is communicated with the air inlet of described middle effect high efficiency particulate air filter, the gas outlet of the second described sack cleaner is communicated with water scrubber by air-introduced machine.
4. equipment as claimed in claim 2, it is characterized in that: described gas phase zone upper space is provided with the built-in cloth bag of fluid bed, and gas phase zone card becomes two regions, left and right with upper part by the 4th baffle for separating, card communicates with all hothouses with the latter half, and the dust arrester of whole fluid bed dryer configuration is built-in sack cleaner; Described built-in sack cleaner is that the built-in cloth bag of fluid bed is directly fixed on fluid bed dryer bulk gas phase district upper space, and described second exhaust port is communicated with the air inlet of described middle effect high efficiency particulate air filter; The gas outlet of described block material separator is communicated with the air inlet of the 3rd sack cleaner; The air outlet of described first row gas port and the 3rd described sack cleaner is communicated with water scrubber by air-introduced machine.
5. equipment as claimed in claim 2, it is characterized in that: described middle effect high efficiency particulate air filter is furnished with the pressure difference test meter measuring filter inlet outlet pressure differential Δ P, wherein, if inlet outlet pressure differential Δ P slowly increases in continuous running, show that exhaust gas circulation system cloth bag is intact, when central effect high efficiency particulate air filter inlet outlet pressure differential Δ P is 2 ~ 5 times of new installation, suggestion imitates high efficiency particulate air filter in cleaning; If described middle effect high efficiency particulate air filter inlet outlet pressure differential Δ P occurs increasing exception suddenly in continuous running, show that exhaust gas circulation system cloth bag has breakage, exhaust gas circulation system cloth bag need be checked, in cleaning, imitate high efficiency particulate air filter.
6. equipment as claimed in claim 2, is characterized in that: described fluid bed dryer body is provided with 2 ~ 20 hothouses, and wherein the first hothouse be circular, after a few room be the horizontal multi-chamber fluidized bed dryer of circle or rectangle.
7. equipment as claimed in claim 6, is characterized in that: described preliminarily dried section and depth drying section gas ratio are 0.5:1 ~ 1:1; The height of the first described circular arc type dividing plate is 0.3 ~ 0.75 times of the first Room diameter; Described solid phase area is except one, two outdoors, and separate with the first dividing plate between all the other each rooms, the first divider height is 0.5 ~ 2 times of horizontal multi-cell fluidized bed distribution grid width; It is 50 ~ 200mm that first dividing plate lower end separates fabric swatch distance, is solid material passage.
8. equipment as claimed in claim 7, is characterized in that: described gas phase zone the first half second partition is separated into two regions, and second partition height is 1/4 ~ 3/4 of upper bed body total height.
9. equipment as claimed in claim 8, is characterized in that: its thermal medium of described internal heater is steam, hot water, conduction oil; Described First Heat Exchanger, the second heat exchanger thermal medium used are steam or conduction oil; Be made up of vapor heat exchanger and condensed water heat exchanger when described secondary heater take steam as thermal medium, gas first through condensed water preheating again by steam heated.
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| CN105157353A (en) * | 2015-03-06 | 2015-12-16 | 中昊晨光化工研究院有限公司 | PTFE suspension resin drying system and method |
| CN107192219A (en) * | 2017-07-27 | 2017-09-22 | 武汉江汉化工设计有限公司 | A kind of industrial grade monoammonium phosphate fluidized bed drying system and its control method |
| CN108626971A (en) * | 2018-05-14 | 2018-10-09 | 马鞍山市润启新材料科技有限公司 | A kind of fluidized bed dryer |
| CN109028768B (en) * | 2018-08-08 | 2020-09-25 | 济南岳丰能源科技有限公司 | Drying system and process for chlorinated polyvinyl chloride resin |
| CN108800759A (en) * | 2018-08-14 | 2018-11-13 | 浙江海正化工股份有限公司 | Vibration fluidizing drier |
| CN109237869B (en) * | 2018-10-31 | 2024-02-23 | 无锡恒诚硅业有限公司 | White carbon black drying system |
| CN112856933A (en) * | 2019-11-28 | 2021-05-28 | 天华化工机械及自动化研究设计院有限公司 | Horizontal multi-chamber fluidized bed, high-density polyethylene drying system and method |
| CN110906691A (en) * | 2019-12-27 | 2020-03-24 | 浙江钱江伟岸干燥设备有限公司 | Multi-chamber flat bed rake-scattering fluidized bed |
| CN111238171A (en) * | 2020-03-24 | 2020-06-05 | 南京国电环保科技有限公司 | Coal sample fluidized drying device |
| CN113446817A (en) * | 2020-03-25 | 2021-09-28 | 江苏苏盐井神股份有限公司 | Anti-caking device and method for cold drying of wet salt |
| CN111380354B (en) * | 2020-04-14 | 2023-10-27 | 磐石自动化系统（深圳）有限公司 | Tail gas circulation system of dryer |
| CN113834316A (en) * | 2020-06-24 | 2021-12-24 | 中国科学院理化技术研究所 | Waste heat recovery system for drying process |
| CN111947443B (en) * | 2020-07-24 | 2022-03-01 | 浙江工业大学 | Closed cycle drying system of open absorption heat pump-MVR technical coupling |
| CN111947444B (en) * | 2020-07-24 | 2022-03-01 | 浙江工业大学 | Closed cycle drying system based on open absorption heat pump |
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