CN1280967A - Process for preparing powdered composite potassium sulfate fertilizer - Google Patents
Process for preparing powdered composite potassium sulfate fertilizer Download PDFInfo
- Publication number
- CN1280967A CN1280967A CN 00112491 CN00112491A CN1280967A CN 1280967 A CN1280967 A CN 1280967A CN 00112491 CN00112491 CN 00112491 CN 00112491 A CN00112491 A CN 00112491A CN 1280967 A CN1280967 A CN 1280967A
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- China
- Prior art keywords
- temperature
- nitration mixture
- ammonia
- neutralization
- pressure
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- C—CHEMISTRY; METALLURGY
- C05—FERTILISERS; MANUFACTURE THEREOF
- C05D—INORGANIC FERTILISERS NOT COVERED BY SUBCLASSES C05B, C05C; FERTILISERS PRODUCING CARBON DIOXIDE
- C05D1/00—Fertilisers containing potassium
- C05D1/02—Manufacture from potassium chloride or sulfate or double or mixed salts thereof
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- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Inorganic Chemistry (AREA)
- Organic Chemistry (AREA)
- Fertilizers (AREA)
Abstract
A process for preparing powdery compound potassium sulfate fertilizer includes such steps as thermal reaction of concentrated sulfuric acid on potassium chloride in two-stage reactor by introducing steam in it, mixing the resultant potassium hydrogen sulfate with water and/or phosphoric acid to obtain mixed acid, neutralizing it with ammonia in tubular reactor, and then directly spray-drying in counterflow spray tower. Its advantages include low investment, smooth particles and high productivity.
Description
A kind of process for preparing powdered composite potassium sulfate fertilizer belongs to technical field of fertilizers, is specifically related to a kind of production method with powdered fertilizer in the Wet-process Phosphoric Acid Production compound potassium sulfate fertilizer production technique.
At present, domestic production technique with the Wet-process Phosphoric Acid Production compound potassium sulfate fertilizer generally has two kinds: a kind of be with Repone K and sulfuric acid (indirect heating or heating sulfuric acid) earlier low-temp reaction generate sal enixum and phosphoric acid by wet process mixed nitration mixture in ammonia and back generation slip, make granular fertilizer again through spray granulating then; Another kind of process using Repone K and sulfuric acid low temperature reaction (chuck heating or heating sulfuric acid indirectly earlier) then also with phosphoric acid by wet process be mixed and made into nitration mixture by in tubular reactor and the ammonia and after, directly spray into and make granular fertilizer again in the rotary drum ammoniation granulator.
Preceding a kind of technology is not only invested bigger, in addition can not be too high to the phosphoric acid by wet process concentration requirement, generally be controlled at 18-20%.As concentration too Gao Zexu add water and transfer rarely, slip is too thick can't whitewash otherwise can cause, this technology granulating and drying temperature is higher in addition, various nutrients are difficult for regulating, and more can't produce nitro class tobacco fertilizer; A kind of technology in back because of granulation and drying not in one, various nutrients are easily controlled, if drying temperature control is lower in addition, can also produces nitro class tobacco fertilizer, but have following shortcoming: (1) investment is big, multiple fertile about 4,000,000 yuan/ten thousand tons (the phosphoric acid device) of investing; (2) returning charge is than big, and about about 10 times, specific productivity is little greatly; (3) finished particle is not slick and sly, and granularity is relatively poor; (4) phosphoric acid concentration is had relatively high expectations, generally be not less than 25%, otherwise neutralization back moisture content is too many, returning charge is bigger than meeting; (5) throughput is low, the energy dissipation height.Though adopt high-concentration phosphoric acid to address the above problem in addition, back slip viscosity is too big, very little moisture because of neutralizing, and the product granularity inequality of producing is rough.
The objective of the invention is existing Wet-process Phosphoric Acid Production potassium sulfate process is improved and a kind of reduced investment, the throughput height that design, the manufacturer that can be domestic compound fertilizer and composite fertilizer simultaneously provides the production method of the basic material-powdered composite potassium sulfate fertilizer of its production usefulness.
The present invention is achieved like this: directly logical steam in being provided with the two-stage reaction groove of acid proof lining carries out reacting by heating with the vitriol oil and Repone K, vapor pressure is greater than 0.2Mpa, temperature of reaction 110-150 ℃, reacted sal enixum and water or with the mixed nitration mixture of making of phosphoric acid, above-mentioned nitration mixture and ammonia neutralize at tubular reactor, neutralization of ammonia pressure 0.1-1.0Mpa, in and nitration mixture pressure 0.2-0.8Mpa, 120-150 ℃ of pipe reaction actuator temperature, slip after the neutralization directly sprays in the adverse current type spray tower, air stream drying becomes powder, dust Wen Changwen to 180 ℃ of Tata spirit, cat head temperature normal temperature to 100 ℃ is along with the increase of gas ammonia in the tubular reactor and nitration mixture degree of neutralization and pressure, the temperature of drying air stream can progressively reduce, until normal temperature.
Embodiment: 100,000 tons of/year Wet-process Phosphoric Acid Production vitriolate of tartar devices.Concrete technical process is as follows: directly logical steam in being provided with the two-stage reaction groove of acid proof lining carries out reacting by heating (utilizing vapor condensation heat and vitriolic hydration heat) with the vitriol oil and Repone K, vapor pressure 0.4Mpa, 130 ℃ of temperature of reaction, the mixed nitration mixture of making of reacted sal enixum and phosphoric acid, above-mentioned nitration mixture and ammonia neutralize at tubular reactor, neutralization of ammonia pressure 0.5Mpa, in and nitration mixture pressure 0.5Mpa, 130 ℃ of pipe reaction actuator temperatures, slip after the neutralization directly sprays in the adverse current type spray tower, air stream drying becomes powder, and the Tata spirit temperature of dusting is about 150 ℃, and cat head temperature is about 70 ℃.Along with degree of neutralization brings up at 1.8 o'clock, cancelled air stream drying.
The multiple fertilizer of powdery of the present invention is made an addition to rotary drum ammoniation-granulation production compound potassium sulfate fertilizer secondary granulation and further spray the compound (mixed) fertilizer slurry in tablets press.Have returning charge than little, finished particle is smooth, specific productivity is big, phosphoric acid concentration is required also advantages such as reduction greatly.Also the multiple fertile production of compound fertilizer producer that is used as of this powdered potassium sulfate can be made raw material in addition.It is simple that the present invention has technology, reduced investment (ten thousand tons of investment costs are below 2,000,000 yuan), and device fabrication requires low, series of advantages such as easy operation.The product of producing is added to that granulation can reduce the returning charge ratio greatly the ammoniation-granulation system in, improves throughput 2-3 times.
Claims (1)
1. process for preparing powdered composite potassium sulfate fertilizer, it is characterized in that it mainly comprises following processing step: directly logical steam in being provided with the two-stage reaction groove of acid proof lining carries out reacting by heating with the vitriol oil and Repone K, vapor pressure is greater than 0.2Mpa, temperature of reaction 110-150 ℃, reacted sal enixum and water or with the mixed nitration mixture of making of phosphoric acid, above-mentioned nitration mixture and ammonia neutralize at tubular reactor, neutralization of ammonia pressure 0.1-1.0Mpa, in and nitration mixture pressure 0.2-0.8Mpa, 120-150 ℃ of pipe reaction actuator temperature, slip after the neutralization directly sprays in the adverse current type spray tower, and air stream drying becomes powder, and the Tata spirit temperature of dusting is at normal temperature to 180 ℃, cat head temperature is at normal temperature to 100 ℃, along with the increase of gas ammonia in the tubular reactor and nitration mixture degree of neutralization and pressure, the temperature of drying air stream can progressively reduce, until normal temperature.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 00112491 CN1280967A (en) | 2000-08-29 | 2000-08-29 | Process for preparing powdered composite potassium sulfate fertilizer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 00112491 CN1280967A (en) | 2000-08-29 | 2000-08-29 | Process for preparing powdered composite potassium sulfate fertilizer |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN1280967A true CN1280967A (en) | 2001-01-24 |
Family
ID=4582347
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 00112491 Pending CN1280967A (en) | 2000-08-29 | 2000-08-29 | Process for preparing powdered composite potassium sulfate fertilizer |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1280967A (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1301236C (en) * | 2005-02-02 | 2007-02-21 | 高苏茂 | Method for producing sulfo composite fertilizer by using ammonified potassium bisulfate solution and its corresponding device |
| CN101200392B (en) * | 2006-12-14 | 2010-12-15 | 上海化工研究院 | Method for manufacturing powdered granulated potassium ammonium sulfate compound fertilizer |
| CN103588541A (en) * | 2013-11-04 | 2014-02-19 | 山东聊城鲁西化工第五化肥有限公司 | System and process for one-time neutralization ammonification granulation production of compound fertilizer |
| CN104003425A (en) * | 2014-06-09 | 2014-08-27 | 山东红日阿康化工股份有限公司 | Novel process for producing potassium hydrogen sulfate and application of potassium hydrogen sulfate in S-based compound fertilizer |
| CN104446795A (en) * | 2014-12-02 | 2015-03-25 | 江苏省地矿复合肥厂 | Process for ammoniation production of potassium sulfate type compound fertilizer with adjustable reaction heat |
-
2000
- 2000-08-29 CN CN 00112491 patent/CN1280967A/en active Pending
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1301236C (en) * | 2005-02-02 | 2007-02-21 | 高苏茂 | Method for producing sulfo composite fertilizer by using ammonified potassium bisulfate solution and its corresponding device |
| CN101200392B (en) * | 2006-12-14 | 2010-12-15 | 上海化工研究院 | Method for manufacturing powdered granulated potassium ammonium sulfate compound fertilizer |
| CN103588541A (en) * | 2013-11-04 | 2014-02-19 | 山东聊城鲁西化工第五化肥有限公司 | System and process for one-time neutralization ammonification granulation production of compound fertilizer |
| CN104003425A (en) * | 2014-06-09 | 2014-08-27 | 山东红日阿康化工股份有限公司 | Novel process for producing potassium hydrogen sulfate and application of potassium hydrogen sulfate in S-based compound fertilizer |
| CN104446795A (en) * | 2014-12-02 | 2015-03-25 | 江苏省地矿复合肥厂 | Process for ammoniation production of potassium sulfate type compound fertilizer with adjustable reaction heat |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C02 | Deemed withdrawal of patent application after publication (patent law 2001) | ||
| WD01 | Invention patent application deemed withdrawn after publication |