CN1828205A - Pipe burying fluid bed drying process for refining salt and saltpetre - Google Patents
Pipe burying fluid bed drying process for refining salt and saltpetre Download PDFInfo
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- CN1828205A CN1828205A CN 200610042244 CN200610042244A CN1828205A CN 1828205 A CN1828205 A CN 1828205A CN 200610042244 CN200610042244 CN 200610042244 CN 200610042244 A CN200610042244 A CN 200610042244A CN 1828205 A CN1828205 A CN 1828205A
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Abstract
The invention relates to a refine salt-saltpeter embedded tube fluid bed drying method, which comprises: wet salt and saltpeter via feeding device enter the refine salt-saltpeter embedded tube fluid bed drying device; the hot air via the bottom of machine enters the drying section; the internal heat exchanger is connected to the steam channel of drying section to process heat exchange between the fluid material and the heat exchanger; the dried matter enters the cooling section from drying section; the cooling air enters the machine from the bottom; the cooled product via the outlet is fed to the finished product area; the tail gas of drying machine enters into the cyclone dust cleaner to be purified to discharge most matter of tail gas to be fed into washing device and discharged. The invention has high heat exchange efficiency, better dust cleaning effect and better drying effect.
Description
Technical field
The present invention relates to purified salt, nitre drying process in a kind of salt manufacturing industry.
Background technology
Along with the development of Chinese society, purified salt, the demand of nitre in civilian and commercial Application are also increasing.Purified salt, nitre present white at normal temperatures, and is microgranular, and main component is a sodium chloride.In the subtractive process of salt, nitre, the drying of salt, nitre is a requisite process procedure, simultaneously also be a technical process that power consumption is higher, constantly improve and improve the drying equipment level of salt manufacturing, nitre industry, will play important facilitation the development of salt manufacturing, nitre industry.Along with salt manufacturing, nitre industry technology and technology rapid development, the drying of salt, nitre is also had higher requirement, not only need depth drying to lump with the stability that increases idodine and when preventing purified salt, nitre long storage time, and the index that need cut down the consumption of energy.
The task of purified salt, nitre drying is that the wet salt, the nitre heat drying that have a small amount of surface water are produced satisfactory purified salt, nitre.The technology that is used for purified salt, nitre drying at present is mainly fixed bubbling bed technology and vibratory liquefaction bed process.
(1) fixed bubbling bed technology: the main flow process of this technology is wet salt, nitre are sent into ebullated bed by conveying equipment a hothouse, plant air provides power via air blast, through entering the hothouse of ebullated bed after the vapor heat exchanger heat exchange, wet salt, nitre present under the effect of hot blast that fluidized state conducts heat and mass transfer, make it to be able to drying, dried purified salt, nitre are discharged through discharge port, and dried tail gas is removed the powder salt of being with, nitre through cyclone dust collectors, through the air-introduced machine emptying.
Mainly there is following shortcoming in this drying process: charging is inhomogeneous, easily forms salt, nitre caking; Moisture is inhomogeneous in the finished product, is easy to generate " dead bed " phenomenon; Drying capacity is little, and equipment is huge, the energy consumption height.
(2) vibratory liquefaction bed process: the vibrated fluidized bed body is by loam cake, fluidized bed air distribution plate and lower chamber are formed, vibrated fluidized bed makes body vibration by the exciting force that two vibrating motors that are installed on the body produce, the material that is dried enters body by charging aperture, and bound forward along horizontal fluidised bed air distribution plate, the pore of the hot blast that meanwhile enters lower chamber by fluidized bed air distribution plate with carry out heat exchange after material contacts, moisture is discharged by the air outlet of body upper by air-introduced machine, emptying after cleaner purifies, dried purified salt, nitre is discharged through discharging opening.
Mainly there is following shortcoming in this drying process: drying capacity is little, and floor space is big; Material is carried secretly more serious, reclaim difficulty and reclaim the back become aberration, be worth low etc.
Summary of the invention
The present invention is directed to the deficiency that existing above-mentioned technology exists, the buried pipe fluidized bed drying process of purified salt, nitre of a kind of thermal efficiency height, energy savings, stable, drying and good dedusting effect is provided.
For achieving the above object, the present invention adopts following technical solution:
This purified salt, the buried pipe fluidized bed drying process of nitre are:
Wet salt, nitre enter by the wet feed conveying device have dryer section, the buried pipe fluidized bed drying machine of purified salt, nitre of cooling section and built-in heat exchanger, hot-air enters its dryer section by the drying machine bottom, hot-air makes material finish fluid mapper process; The built-in heat exchanger of drying machine dryer section is connected with jet chimney simultaneously, makes the material of fluidized state and heat exchanger carry out indirect heat exchange, and wet salt, nitre carry out drying under the dual-heated effect of hot blast and built-in heat exchanger; Dried purified salt, nitre enter cooling section from dryer section, and the cooling air is entered by the bottom of cooling section, and dried purified salt, nitre cool off under the double action of cooling air and built-in cooling section heat exchanger; Cooled finished product is sent into the finished product district by the drying machine discharging opening through finished conveying device, the tail gas of drying machine enters cyclone dust collectors through pipeline and carries out primary purification, most of material that tail gas is carried secretly is collected the back by cyclone dust collectors and is discharged, tail gas through primary purification enters washer by air-introduced machine, emptying after washing again.
Hot-air is that air is producing after air cleaner dust removal by filtration and external air heat exchanger heat exchange under the air blast effect.At the drying machine dry section, hot-air makes material keep normal fluidisation attitude on the one hand, carries out heat exchange with material on the other hand, adds thermal material and makes water evaporates, and the off-air after the cooling carries the moisture content that material evaporates and leaves.
The cooling air is that air is producing after the air cleaner dust removal by filtration under the cooling air blower effect, enters the drying machine cooling zone, carries out heat exchange in cooling zone and material, and material is cooled off.
The system of above-mentioned technical process forms: comprise wet feed conveying device, purified salt, the buried pipe fluidized bed drying machine of nitre, cyclone dust collectors, finished conveying device and washer, the wet feed conveying device is connected with purified salt, the buried pipe fluidized bed drying machine of nitre, this drying machine built-in heat exchanger is arranged to the serpentine coil form, and heat exchanger is connected with the condensed water reclaim line with jet chimney; Built-in cooling heat exchanger is connected with cooling water pipeline and CWR road; The air outlet of drying machine is connected with cyclone dust collectors, and the bottom of cyclone dust collectors is connected with finished conveying device by star-like discharger, and cyclone dust collectors are connected with centrifugal induced draught fan by pipeline, and air-introduced machine is connected with washer; The drying machine discharging opening is connected with finished conveying device; The air cleaner of air cleaner, air blast and the external vapor heat exchanger of generation hot-air and generation cooling air and cooling air blower link to each other with the air compartment of purified salt, the buried pipe fluidized bed drying machine of nitre bottom by pipeline separately.Producing hot-air and produce the two-way air blast that cools off air also can be shared one, and its import department connects filter, and the outlet of air outlet is divided into two-way, and one the tunnel enters the vapor heat exchanger heat exchange becomes hot-air to enter dryer section; Another section directly enters cooling section.
The wet feed conveying device comprises conveyer and the distributing device that is connected, and distributing device is connected with purified salt, the buried pipe fluidized bed drying machine of nitre.Material enters distributing device by conveyer, enters drying machine through the peptizaiton of distributing device.
Finished conveying device is for carrying the outfeed belt conveyor of finished product.Finished product directly enters packaging process.
The present invention adopts and integrates the buried pipe fluidized bed drying machine of purified salt, nitre dry, that cool off, the heat exchange efficiency height, and equipment investment is little, has guaranteed the drying quality of material, and drying effect is good; By cyclone dust collectors and the dedusting of washer two-stage, guaranteed good dust removing effects.
Description of drawings
Fig. 1 is that process flow system of the present invention is formed schematic diagram.
Fig. 2 is the purified salt among the present invention, the structural representation of the buried pipe fluidized bed drying machine of nitre.
Fig. 3 is the right view of Fig. 2.
Wherein, 1, conveyer, 2, distributing device, 3, air cleaner, 4, air blast, 5, vapor heat exchanger, 6, purified salt, the buried pipe fluidized bed drying machine of nitre, 7, cyclone dust collectors, 8, star-like discharger, 9, air-introduced machine, 10, washer, 11, outfeed belt conveyor, 12, charging aperture, 13, air outlet, 14, the dryer section heat exchanger, 15, fluidisation section, 16, hot-air inlets, 17, support, 18, cooling air inlet, 19, the cooling section heat exchanger, 20, discharging opening.
The specific embodiment
Embodiment:
The system that Fig. 1 has provided technological process of the present invention forms.Comprise:
(1) is used for conveyer 1 and the distributing device 2 that wet feed is carried.Distributing device 2 is connected with purified salt, the buried pipe fluidized bed drying machine 6 of nitre, and material enters distributing device 2 by conveyer 1, enters the charging aperture 12 of drying machine 6 through the peptizaiton of distributing device.
(2) be used to produce air cleaner 3, air blast 4 and the external vapor heat exchanger 5 of hot-air.Link to each other by the bottom air compartment of pipeline, enter the dryer section of drying machine 6 by the hot-air inlets 16 of drying machine 6 with purified salt, the buried pipe fluidized bed drying machine 6 of nitre.Air cleaner 3 and air blast 4 produce the cooling air simultaneously, directly enter its cooling section by pipeline by the cooling air inlet 18 of drying machine 6.
(3) be used to carry the outfeed belt conveyor 11 of finished product, be installed on the discharging opening place of purified salt, the buried pipe fluidized bed drying machine 6 of nitre, finished product directly enters packaging process.
(4) be used for the cyclone dust collectors 7 of dedusting, be connected with the air outlet above the outlet housing of purified salt, the buried pipe fluidized bed drying machine 6 of nitre, the bottom of cyclone dust collectors 7 is connected with outfeed belt conveyor 11 by star-like discharger 8, cyclone dust collectors 7 are connected with air-introduced machine 9 by pipeline, and air-introduced machine 9 is connected with washer 10.The tail gas of drying machine 6 enters cyclone dust collectors 7 by air outlet 12 through pipeline and carries out primary purification, and most of material that tail gas is carried secretly is collected the back by cyclone dust collectors and discharged, and the tail gas of process primary purification enters washer 10 by air-introduced machine 9, emptying after washing again.
Dry workshop section of the present invention adopts purified salt, the buried pipe fluidized bed drying machine 6 of nitre, its structure comprises charging aperture 12, air outlet 13, dryer section heat exchanger 14, fluidisation section 15, hot-air inlets 16, support 17, cooling air inlet 18, cooling section heat exchanger 19 and discharging opening 20 as shown in Figure 2.The built-in heat exchanger of this equipment is arranged to the serpentine coil form, and heat exchanger is connected with the condensed water reclaim line with jet chimney; The cooling serpentine coil is connected with cooling water pipeline and CWR road.This layout is less to the fluidisation quality influence, and can obtain bigger heat exchange area.This drying machine dry run institute calorific requirement is mainly provided by built-in heat exchanger.The heat transfer of built-in heat exchanger and two phase flow in the drying machine is undertaken by the steam inside coil pipe.The wall that is fluidised solid particle heat exchanging device in fluid bed collides, and makes the fluid boundary layer attenuate.Therefore this drying machine has the higher coefficient of heat transfer.Most heats in the two phase flow are transmitted to solid particle by wall, and the dry fluid gas that needs of this drying machine, mainly work to keep bed particle normal fluidization, significantly reduce than the required fluidization gas of common fluid bed dried material, thereby reduced the specification and the power attenuation of blower fan.The dry run of this drying machine mainly is diabatic process and the heat transfer between the two phase flow and the mass transport process of built-in heat exchanger and two phase flow.Under the fluidized state, Dual-Phrase Distribution of Gas olid has the higher gradation of moisture, and can fully contact, and mass transfer condition is better.Fluidized drying has guaranteed that the material thickness and the time of staying all can realize the adjustment in the scope of design, so guaranteed the drying quality of material.
Dust arrester of the present invention comprises the cyclone dust collectors 7 of one-level and the washer 10 of secondary, powder salt, nitre particle enter finished conveying device after collecting through cyclone dust collectors, tail gas is then carried through air-introduced machine 9 and is connected with the washer 10 of secondary, dust in the tail gas is collected through washer 10, through the tail gas emptying of washer filtration.This dust arrester is simple in structure, and the pressure loss is little, and it is big to handle air quantity, has efficiency of dust collection preferably; Washer fully washs dusty gas in water, itself is simple in structure, with low cost.When the dusty gas with certain inlet velocity in air inlet pipe enters washer, simultaneously washings evenly spray by the shower nozzle of washer top, most grits are dissolved in the water, the minute quantity grit enters atmosphere with tail gas.
Technical process of the present invention is:
Wet salt, nitre are carried by conveyer 1 and are evenly sent in purified salt, the buried pipe fluidized bed drying machine 6 of nitre through distributing device 2, the hot-air that air blast 4, air cleaner 3 and vapor heat exchanger 5 produce enters dryer section by the bottom air compartment of drying machine 6, the air distribution plate that passes drying machine 6 again enters the fluid bed bed of drying machine fluidisation section 15, and this hot-air drives material and finishes fluid mapper process.The built-in dryer section heat exchanger 14 of drying machine 6 inside is connected with condensing water conduit with jet chimney simultaneously, make the material and the heat exchanger of fluidized state carry out indirect heat exchange, the condensed water that built-in heat exchanger 14 produces is sent into the condensed water reclaim line, and wet salt, nitre carry out drying under the dual-heated effect of hot blast and interior heat pipe; Dried purified salt, nitre enter cooling section from dryer section, the cooling air is entered by the bottom of cooling section, cooling section heat exchanger 19 is connected with cooling water pipeline and CWR road, and dried purified salt, nitre cool off under the double action of cooling air and heat exchanger 19.The finished product that cooling is good enters outfeed belt conveyor 11 by fluid bed discharging opening 20, sends into the finished product packing district by conveyer 11 again.Tail gas in the drying machine 6 carries out the dedusting first time through cyclone dust collectors 7 earlier, and tail gas part granule dust enters finished product packing district, the emptying behind washer 10 double purifications of another part tail gas through collecting.
The present invention has following characteristics:
A, adopt the fluidized drying principle to carry out the drying of purified salt, nitre, can make things convenient for the accent of each parameter in scope of design Whole.
B, adopt the drying machine of the buried pipe fluidized bed structure of multilayer, can in littler area, arrange more heat exchange area, The fluidisation area of equipment reduces greatly; The fluidisation area reduces, so the fluidisation air quantity that needs reduces greatly, the dedusting of back is established Standby volume is little, and the circulated air pipeline is little, and the overall volume of equipment is little, and the specification of blower fan and power consumption are also low, saves the energy.
C, easy to operate, system's control is advanced, and operating flexibility is big.
D, employing dry type and the dedusting of wet type two-stage, efficiency of dust collection height, effective.
Claims (7)
1, a kind of purified salt, the buried pipe fluidized bed drying process of nitre, its technical process is:
Wet salt, nitre enter by the wet feed conveying device have dryer section, the buried pipe fluidized bed drying machine of purified salt, nitre of cooling section and built-in heat exchanger, hot-air enters its dryer section by the drying machine bottom, hot-air makes material finish fluid mapper process; The built-in heat exchanger of drying machine dryer section is connected with jet chimney simultaneously, makes the material of fluidized state and heat exchanger carry out indirect heat exchange, and wet salt, nitre carry out drying under the dual-heated effect of hot blast and built-in heat exchanger; Dried purified salt, nitre enter cooling section from dryer section, and the cooling air is entered by the bottom of cooling section, and dried purified salt, nitre cool off under the double action of cooling air and built-in cooling section heat exchanger; Cooled finished product is sent into the finished product district by the drying machine discharging opening through finished conveying device, the tail gas of drying machine enters cyclone dust collectors through pipeline and carries out primary purification, most of material that tail gas is carried secretly is collected the back by cyclone dust collectors and is discharged, tail gas through primary purification enters washer by air-introduced machine, emptying after washing again.
2, purified salt according to claim 1, the buried pipe fluidized bed drying process of nitre is characterized in that: hot-air is that air is producing after air cleaner dust removal by filtration and external air heat exchanger heat exchange under the air blast effect.
3, purified salt according to claim 1, the buried pipe fluidized bed drying process of nitre is characterized in that: the cooling air is that air is producing after the air cleaner dust removal by filtration under the cooling air blower effect.
4, the system of the described purified salt of a kind of claim 1, the buried pipe fluidized bed drying process of nitre forms, it is characterized in that: comprise wet feed conveying device, purified salt, the buried pipe fluidized bed drying machine of nitre, cyclone dust collectors, finished conveying device and washer, the wet feed conveying device is connected with purified salt, the buried pipe fluidized bed drying machine of nitre, this drying machine built-in heat exchanger is arranged to the serpentine coil form, and heat exchanger is connected with the condensed water reclaim line with jet chimney; Built-in cooling heat exchanger is connected with cooling water pipeline and CWR road; The air outlet of drying machine is connected with cyclone dust collectors, and the bottom of cyclone dust collectors is connected with finished conveying device by star-like discharger, and cyclone dust collectors are connected with centrifugal induced draught fan by pipeline, and air-introduced machine is connected with washer; The drying machine discharging opening is connected with finished conveying device; The air cleaner of air cleaner, air blast and the external vapor heat exchanger of generation hot-air and generation cooling air and cooling air blower link to each other with the air compartment of purified salt, the buried pipe fluidized bed drying machine of nitre bottom by pipeline separately.
5, the system according to the described purified salt of claim 4, the buried pipe fluidized bed drying process of nitre forms, it is characterized in that: produce hot-air and shared one of the two-way air blast that produces the cooling air, its import department connects filter, the outlet of air outlet is divided into two-way, and one the tunnel enters the vapor heat exchanger heat exchange becomes hot-air to enter dryer section; Another section directly enters cooling section.
6, the system according to the described purified salt of claim 4, the buried pipe fluidized bed drying process of nitre forms, and it is characterized in that: the wet feed conveying device comprises conveyer and the distributing device that is connected, and distributing device is connected with purified salt, the buried pipe fluidized bed drying machine of nitre.
7, the system according to the described purified salt of claim 4, the buried pipe fluidized bed drying process of nitre forms, and it is characterized in that: finished conveying device is for carrying the outfeed belt conveyor of finished product.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200610042244 CN1828205A (en) | 2006-02-09 | 2006-02-09 | Pipe burying fluid bed drying process for refining salt and saltpetre |
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| CN 200610042244 CN1828205A (en) | 2006-02-09 | 2006-02-09 | Pipe burying fluid bed drying process for refining salt and saltpetre |
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| CN 200610042244 Pending CN1828205A (en) | 2006-02-09 | 2006-02-09 | Pipe burying fluid bed drying process for refining salt and saltpetre |
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101852540A (en) * | 2010-07-12 | 2010-10-06 | 山东天力干燥设备有限公司 | Comprehensive utilization system for drying low-order coal of thermal power plant in steam pumping and indirect heat exchanging way and process thereof |
| CN103322773A (en) * | 2013-06-30 | 2013-09-25 | 金川集团股份有限公司 | System and method for drying sodium sulfite materials |
| CN104781624A (en) * | 2012-10-05 | 2015-07-15 | 阿兰·J·奇泽姆 | Method and apparatus for drying particulate matter |
| CN108679995A (en) * | 2018-05-03 | 2018-10-19 | 山东科院天力节能工程有限公司 | Steam rotary drying system for purified salt and the method for preparing purified salt |
| CN110637205A (en) * | 2017-05-15 | 2019-12-31 | Bma不伦瑞克机械制造企业股份公司 | Evaporative dryer and method for operating the same |
| CN111981771A (en) * | 2019-05-21 | 2020-11-24 | 江苏苏盐井神股份有限公司 | Novel flaky calcium chloride dihydrate drying and cooling device and method |
| 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 |
| CN117168091A (en) * | 2023-11-03 | 2023-12-05 | 江苏大江干燥设备有限公司 | Fluidized bed dryer with built-in heat exchanger |
-
2006
- 2006-02-09 CN CN 200610042244 patent/CN1828205A/en active Pending
Cited By (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101852540A (en) * | 2010-07-12 | 2010-10-06 | 山东天力干燥设备有限公司 | Comprehensive utilization system for drying low-order coal of thermal power plant in steam pumping and indirect heat exchanging way and process thereof |
| CN101852540B (en) * | 2010-07-12 | 2012-07-04 | 山东天力干燥股份有限公司 | Comprehensive utilization system for drying low-order coal of thermal power plant in steam pumping and indirect heat exchanging way and process thereof |
| CN104781624A (en) * | 2012-10-05 | 2015-07-15 | 阿兰·J·奇泽姆 | Method and apparatus for drying particulate matter |
| CN103322773A (en) * | 2013-06-30 | 2013-09-25 | 金川集团股份有限公司 | System and method for drying sodium sulfite materials |
| CN103322773B (en) * | 2013-06-30 | 2015-06-17 | 金川集团股份有限公司 | System and method for drying sodium sulfite materials |
| CN110637205A (en) * | 2017-05-15 | 2019-12-31 | Bma不伦瑞克机械制造企业股份公司 | Evaporative dryer and method for operating the same |
| US11320199B2 (en) | 2017-05-15 | 2022-05-03 | Bma Braunschweigische Maschinenbauanstalt Ag | Evaporation dryer and method for operating same |
| CN108679995A (en) * | 2018-05-03 | 2018-10-19 | 山东科院天力节能工程有限公司 | Steam rotary drying system for purified salt and the method for preparing purified salt |
| CN111981771A (en) * | 2019-05-21 | 2020-11-24 | 江苏苏盐井神股份有限公司 | Novel flaky calcium chloride dihydrate drying and cooling device and method |
| 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 |
| CN117168091A (en) * | 2023-11-03 | 2023-12-05 | 江苏大江干燥设备有限公司 | Fluidized bed dryer with built-in heat exchanger |
| CN117168091B (en) * | 2023-11-03 | 2024-02-06 | 江苏大江干燥设备有限公司 | Fluidized bed dryer with built-in heat exchanger |
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