CN101979322B - Drying method for use in potassium nitrate production - Google Patents
Drying method for use in potassium nitrate production Download PDFInfo
- Publication number
- CN101979322B CN101979322B CN201010501455A CN201010501455A CN101979322B CN 101979322 B CN101979322 B CN 101979322B CN 201010501455 A CN201010501455 A CN 201010501455A CN 201010501455 A CN201010501455 A CN 201010501455A CN 101979322 B CN101979322 B CN 101979322B
- Authority
- CN
- China
- Prior art keywords
- saltpetre
- fluid bed
- dryer
- drying
- bed dryer
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
- FGIUAXJPYTZDNR-UHFFFAOYSA-N potassium nitrate Chemical compound [K+].[O-][N+]([O-])=O FGIUAXJPYTZDNR-UHFFFAOYSA-N 0.000 title claims abstract description 106
- 235000010333 potassium nitrate Nutrition 0.000 title claims abstract description 53
- 239000004323 potassium nitrate Substances 0.000 title claims abstract description 53
- 238000001035 drying Methods 0.000 title claims abstract description 44
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 20
- WCUXLLCKKVVCTQ-UHFFFAOYSA-M Potassium chloride Chemical compound [Cl-].[K+] WCUXLLCKKVVCTQ-UHFFFAOYSA-M 0.000 claims abstract description 5
- PAWQVTBBRAZDMG-UHFFFAOYSA-N 2-(3-bromo-2-fluorophenyl)acetic acid Chemical compound OC(=O)CC1=CC=CC(Br)=C1F PAWQVTBBRAZDMG-UHFFFAOYSA-N 0.000 claims abstract description 4
- 238000000354 decomposition reaction Methods 0.000 claims abstract description 4
- 239000002994 raw material Substances 0.000 claims abstract description 4
- 239000012530 fluid Substances 0.000 claims description 33
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 15
- 238000000034 method Methods 0.000 claims description 14
- 239000002918 waste heat Substances 0.000 claims description 4
- 238000007599 discharging Methods 0.000 claims description 3
- 238000002360 preparation method Methods 0.000 claims description 3
- 238000005265 energy consumption Methods 0.000 abstract description 3
- 235000011164 potassium chloride Nutrition 0.000 abstract 1
- 239000001103 potassium chloride Substances 0.000 abstract 1
- 239000000463 material Substances 0.000 description 14
- 239000000047 product Substances 0.000 description 10
- 239000007789 gas Substances 0.000 description 4
- 238000004140 cleaning Methods 0.000 description 3
- 238000009434 installation Methods 0.000 description 3
- 239000002699 waste material Substances 0.000 description 3
- 230000018044 dehydration Effects 0.000 description 2
- 238000006297 dehydration reaction Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 239000012467 final product Substances 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- 206010013786 Dry skin Diseases 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 239000006185 dispersion Substances 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 239000010881 fly ash Substances 0.000 description 1
- 229910017053 inorganic salt Inorganic materials 0.000 description 1
- 238000012856 packing Methods 0.000 description 1
- 238000011084 recovery Methods 0.000 description 1
- 239000000725 suspension Substances 0.000 description 1
- -1 this Chemical compound 0.000 description 1
Images
Landscapes
- Drying Of Solid Materials (AREA)
- Vaporization, Distillation, Condensation, Sublimation, And Cold Traps (AREA)
Abstract
The invention discloses a drying method for use in potassium nitrate production. Potassium nitrate is produced by using potassium chloride and ammonium nitrate as raw materials and by a double decomposition circulation production process, wherein the prepared potassium nitrate is dried by an air flow drying machine and a fluidized bed drying machine which are connected in series. The dried potassium nitrate product is of high quality, the moisture content of the dried potassium nitrate product is less than or equal to 0.1 percent, and hot air can be comprehensively recycled, so that energy consumption is greatly reduced, environment is protected and energy is saved.
Description
Technical field: the present invention relates to a kind of Production of Potassium Nitrate drying means.
Background technology: saltpetre is as important chemical material, and it is widely used in industries such as worker, agricultural and food chemical industry, and the production of saltpetre is raw material with Repone K and an ammonium nitrate generally at present, adopts the double decomposition circulation process production technique to produce; The saltpetre that production is processed carries out drying after dehydration, process final product, and present drying installation and method typically use single drying mode and carry out; The one, adopt airflow dryer, mainly with hot air type pipeline dryer or wink-dry machine; The material dispersion suspension carries at air-flow that moment removes moisture content in the process secretly in warm air, it requires hot air temperature more than 180 ℃; Generally about 300 ℃; Be a kind of drying mode fast continuously, but because residence time of material is short, the exsiccant quality product is difficult to be guaranteed.The 2nd, adopt fluid bed dryer to carry out drying, vibrating fluidized bed dryer normally, its whole machine body is supported on the base through spring, and porous plate tilts to discharge end slightly; Residence time of material is easy to control when dry, and product can reach comparatively ideal water ratio, but because it is the air stream drying mode; Warm air waste is big, and energy consumption is high, and material is not controlled material material high humidity well because of humidity; The haftplatte caking phenomenon very easily occurs, goods fluid speed is slow, has greatly influenced drying effect and quality.Thereby causing a large amount of Hot air quilt wastes, energy expenditure is very big.
Summary of the invention: the present invention will provide a kind of Production of Potassium Nitrate drying means exactly, adopts airflow drying and the fluid bed dryer drying mode that is in series, exsiccant saltpetre good product quality; Water ratio is low≤0.05Wt%; Warm air can circulation comprehensive utilization, energy efficient greatly, environmental protection and energy saving.
Technical scheme of the present invention is to be raw material with Repone K and an ammonium nitrate like this, adopts the double decomposition circulation process production technique, preparation saltpetre, and saltpetre combines with airflow dryer and fluid bed dryer after dehydrating again and carries out drying.
Drying means of the present invention be saltpetre after dehydrating, adopt airflow dryer and the fluid bed dryer mode drying that is in series, said series system drying is that saltpetre carries out drying just with the airflow dryer oven dry after centrifugal drying; Dry through the fluid bed dryer of exsiccant saltpetre entering just, preparation saltpetre finished product.
Described Production of Potassium Nitrate drying means is that saltpetre is through dehydrating to water cut≤3wt%; Be dried to water cut≤1wt% through airflow dryer; Be dried to water cut≤0.05Wt% through fluid bed dryer.
Described Production of Potassium Nitrate drying means; Be to be introduced into the fluid bed dryer drying from the warm air that heated air source is discharged; The waste heat air that gives off from fluid bed dryer gets into airflow dryer again, and the surplus warm air that discharge dry back is recycled to heated air source after dedusting separates.
Production of Potassium Nitrate drying means of the present invention is that the heat air pressure that control gets in the fluid bed dryer is 2-3kg/cm
2
Technical scheme of the present invention is after saltpetre is adopted mechanical centrifugal drying earlier, its water ratio to be reduced to below the 3wt%; The bonded mode because use airflow dryer and fluid bed dryer are in series is to carrying out drying through the saltpetre that dehydrates; It is interior to dry materials that heated air source is introduced into fluid bed dryer, discharges waste hot air and get into use in the airflow dryer again, and the surplus hot gas that is given off by airflow dryer is recycled to the heated air source basin again after the fly-ash separator dedusting; So just formed a hot gas cycle; And the saltpetre product is introduced in the airflow dryer behind mechanical dehydration; The just dry laggard oven dry in the fluid bed dryer of going into of saltpetre; Saltpetre material and warm air form reverse convection current like this, material to greatest extent with the warm air contact drying, guaranteed the saltpetre quality product.General single drying installation and the method used of existing simultaneously dry technology, and use the dry saltpetre moisture of airflow dryer only can reach about 1wt%.The dry saltpetre of fluid bed dryer also only can reach about 0.8wt%, and the water cut of saltpetre GB first grade and premium grads will reach≤and below the 0.1wt%; So use single drying means device, be difficult to produce the saltpetre product of high standard quality.Use the heat-conduction medium of the tail gas of recovery fluid bed dryer as airflow dryer; Owing to reached about 1wt% through the dried saltpetre moisture of airflow dryer; So supply with the air pressure of the warm air that fluid bed dryer goes into from heated air source lower, generally is controlled at 2-3kg/cm
2, and prior art is usually at 5kg/cm
2More than, adopt technical scheme of the present invention to practice thrift energy consumption to greatest extent like this, save production cost; Simultaneously since if water cut reaches the wet saltpetre of 3wt% directly enter into fluid bed dryer after because the saltpetre water cut is too high, its viscosity increases; Be easy to occur the haftplatte caking phenomenon, cause warm air not circulate, goods fluid speed is slow; Influence the bake drying effect greatly, also increased the weight of body load widely, significantly improved the device fails rate.Adopt the inventive method to reduce production costs significantly, improved the quality of production of saltpetre, improved competitiveness of product.
Saltpetre product of the present invention is check saltpetre moisture content≤0.02wt% through national inorganic salt product quality supervision and test center
Description of drawings: Fig. 1 drying installation schematic flow sheet of the present invention.
1. fluid bed dryer, 2. airflow dryer, 3. boiler, 4. cleaning apparatus, 5. opening for feed, 6. heated air source.
Embodiment: the inventive method is done further explain below in conjunction with accompanying drawing.Boiler 3 steam outlet pipes as shown in Figure 1 are connected with heated air source 6; Heated air source 6 air outlets are connected on the fluid bed dryer 1; Fluid bed dryer 1 escape pipe connects on the air inlet mouth of pipe of airflow dryer 2, and the saltpetre material is got into and the motion of waste heat oven dry air-flow equidirectional by airflow dryer 2 air inlet pipe ends; The first dry saltpetre of warp oven dry enters in the fluid bed dryer 1 from the material outlet of airflow dryer 2, and the residue hot gas of discharging from airflow dryer 2 is recovered to formation circulation in the heated air source 6 after cleaning apparatus 4 dedustings.
Working process: the steam that comes out from boiler 3 gets in the heated air source 6, controls its air pressure at 2-3kg/cm
2Get in the fluid bed dryer 1; Saltpetre is carried out drying, from the waste heat air admission that comes out in the fluid bed dryer 1 in airflow dryer 2, saltpetre material that simultaneously will be after centrifugal drying; Control its water cut in 3wt%; Get into from the opening for feed 5 of airflow dryer 2, the equidirectional motion of saltpetre material and warm air is lower than 1wt% in airflow dryer 2 inner dryings to its water cut, enters into fluid bed dryer 1 interior the contact with fluid bed dryer 1 interior warm air relative direction then and makes the abundant contact drying of saltpetre; Control its water cut less than 0.02wt%, be about to its packing and process final product; Continue to recycle and after cleaning apparatus 4 dedustings, get into heated air source 6 from airflow dryer 2 interior surplus warm airs of discharging.
Claims (2)
1. a Production of Potassium Nitrate drying means is a raw material with Repone K and an ammonium nitrate, adopts the double decomposition circulation process production technique, preparation saltpetre, and the saltpetre of production combines with airflow dryer and fluid bed dryer after dehydrating again and carries out drying; Be that saltpetre adopts airflow dryer and the fluid bed dryer mode drying that is in series after dehydrating, said series system drying be saltpetre after dehydrating, dry just dry with airflow dryer; Dry through the fluid bed dryer of exsiccant saltpetre entering just; Saltpetre is through dehydrating to water cut≤3wt%; Be dried to water cut≤1wt% through airflow dryer; Be dried to water cut≤0.05Wt% through fluid bed dryer; It is characterized in that said drying means is to be introduced into the fluid bed dryer drying from the warm air that heated air source is discharged; The waste heat air of discharging from fluid bed dryer gets into airflow dryer again, and the surplus warm air that discharge dry back is recycled to heated air source after dedusting separates.
2. according to the described Production of Potassium Nitrate drying means of claim 1, it is characterized in that controlling the heat air pressure that gets in the fluid bed dryer is 2-3kg/cm
2
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201010501455A CN101979322B (en) | 2010-10-07 | 2010-10-07 | Drying method for use in potassium nitrate production |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201010501455A CN101979322B (en) | 2010-10-07 | 2010-10-07 | Drying method for use in potassium nitrate production |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101979322A CN101979322A (en) | 2011-02-23 |
| CN101979322B true CN101979322B (en) | 2012-10-03 |
Family
ID=43599874
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201010501455A Active CN101979322B (en) | 2010-10-07 | 2010-10-07 | Drying method for use in potassium nitrate production |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN101979322B (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104403642B (en) * | 2014-10-13 | 2017-06-23 | 赵家春 | Fused salt of solar light-heat power-generation and preparation method thereof |
| CN108036609A (en) * | 2018-01-19 | 2018-05-15 | 江西金利达钾业有限责任公司 | A kind of potassium nitrate vacuum drier |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1047265A (en) * | 1989-05-18 | 1990-11-28 | 奥林公司 | Produce the modifying device of instant granulated product |
| CN1887915A (en) * | 2006-07-19 | 2007-01-03 | 山东天力干燥设备有限公司 | Chlorinated polyethylene drying process |
| CN101088980A (en) * | 2006-06-16 | 2007-12-19 | 兰州瑞德干燥技术有限公司 | Two-stage gas flow-fluidized bed drying process and apparatus with nitogen circulated adipic acid and overheated steam |
-
2010
- 2010-10-07 CN CN201010501455A patent/CN101979322B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1047265A (en) * | 1989-05-18 | 1990-11-28 | 奥林公司 | Produce the modifying device of instant granulated product |
| CN101088980A (en) * | 2006-06-16 | 2007-12-19 | 兰州瑞德干燥技术有限公司 | Two-stage gas flow-fluidized bed drying process and apparatus with nitogen circulated adipic acid and overheated steam |
| CN1887915A (en) * | 2006-07-19 | 2007-01-03 | 山东天力干燥设备有限公司 | Chlorinated polyethylene drying process |
Non-Patent Citations (1)
| Title |
|---|
| 张麦奎，赵旭.氮气和过热蒸汽循环的气流－流化床组合干燥工艺.《通用机械》.2008,(第4期),工艺流程部分，图，表. * |
Also Published As
| Publication number | Publication date |
|---|---|
| CN101979322A (en) | 2011-02-23 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN107976054B (en) | Closed-loop two-stage drying method and drying device for 1, 3-cyclohexanedione | |
| CN206459472U (en) | A kind of layer-stepping high efficiency medicinal material dryer | |
| CN103288325A (en) | Printing and dyeing sludge drying treatment system | |
| CN103256791B (en) | A kind of atlapulgite drying system | |
| CN101979322B (en) | Drying method for use in potassium nitrate production | |
| CN103387248A (en) | Method and fluidized-bed plant for preparing magnesium sulfate monohydrate by using magnesium sulfate heptahydrate | |
| CN203731460U (en) | System for drying fuel by waste smoke gas in biomass power plant | |
| CN102748923B (en) | Method for drying coal slime | |
| CN105858699B (en) | Utilize the production technology and device of the dry synthetic calcium carbonate of high warm flue gas carbonization | |
| CN204301412U (en) | A kind of rapid draing fluid bed | |
| CN203413930U (en) | Activated clay drying system | |
| CN207828090U (en) | A kind of two-stage type mud drying device and system | |
| CN104294036B (en) | Iron ore pellet roasting device | |
| CN203053181U (en) | Hot blast pulse flow drying device for expansible graphite | |
| CN202757403U (en) | Device for pretreating and drying laterite-nickel ore with reduction kiln fume | |
| CN205668356U (en) | Plastic raw material drier | |
| CN203298574U (en) | Dryer | |
| CN202692637U (en) | Drum dryer used for producing organic fertilizers | |
| CN204141937U (en) | Fluidized bed drying equipment | |
| CN205156559U (en) | Drying device that processing nano calcium carbonate used | |
| CN203771904U (en) | Drying equipment | |
| CN104154554B (en) | A kind of fine cleaned coal dehumidification system dust disposal technique | |
| CN204027288U (en) | A kind of mercury catalyst is produced circulation of tail gas and is utilized drying system | |
| CN102445065B (en) | Slurry drying and recycling method in coal washery | |
| CN203816884U (en) | Drying and curing energy-saving device |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20210414 Address after: 336000 No.8, Jingfa Avenue, Yichun economic and Technological Development Zone, Yichun City, Jiangxi Province Patentee after: Golden potassium Technology Co.,Ltd. Address before: 336000 Jiangxi Yichun Economic Development Zone Tengda Chemical Co., Ltd Patentee before: Zhao Jiachun Patentee before: Zhao Chen |
|
| TR01 | Transfer of patent right |