CN109232063A - A kind of production of sulfur-based compound fertilizer method of no by-product hydrochloric acid - Google Patents
A kind of production of sulfur-based compound fertilizer method of no by-product hydrochloric acid Download PDFInfo
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- CN109232063A CN109232063A CN201811419247.1A CN201811419247A CN109232063A CN 109232063 A CN109232063 A CN 109232063A CN 201811419247 A CN201811419247 A CN 201811419247A CN 109232063 A CN109232063 A CN 109232063A
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- Prior art keywords
- potassium
- ammonium
- sulfate
- ammonium sulfate
- based compound
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- C—CHEMISTRY; METALLURGY
- C05—FERTILISERS; MANUFACTURE THEREOF
- C05B—PHOSPHATIC FERTILISERS
- C05B7/00—Fertilisers based essentially on alkali or ammonium orthophosphates
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Abstract
The invention discloses a kind of production of sulfur-based compound fertilizer methods of no by-product hydrochloric acid, the method is mixed to get mixed slurry for phosphoric acid is added after potassium chloride and ammonium sulfate metathesis reaction preparing potassium sulfate ammonium sulfate, it is passed through ammonia neutralization, the substance for adjusting the ratio of nitrogen, phosphorus, potassium is added, obtains S-based compound fertilizer through being granulated.The present invention uses potassium chloride and ammonium sulfate metathesis reaction preparing potassium sulfate ammonium, substitutes traditional potassium acid sulfate.Entire production process is not related to sulfuric acid, does not generate hydrochloric acid or hydrogen chloride, and reaction does not need steam or other external sources.It can solve the exceeded problem of hydrogen chloride tail gas, the present invention is not related to sulfuric acid, and reflection is mild, discharges without hydrogen chloride tail gas, safe and environment-friendly, energy saving.
Description
Technical field
The invention belongs to chemical technology fields, are related to a kind of production of sulfur-based compound fertilizer method of no by-product hydrochloric acid, specially
It is a kind of to substitute traditional potassium acid sulfate using potassium chloride and ammonium sulfate metathesis reaction preparing potassium sulfate ammonium and produce S-based compound fertilizer
Method.
Background technique
A large amount of hydrogen chloride gas can be generated during production of sulfur-based compound fertilizer, and Nacl is generally made using water absorption
Acid, but the market demand of hydrochloric acid is limited, currently, hydrochloric acid production capacity greatly exceeds the market demand, S-based compound fertilizer goes into operation
Rate is limited by the sale of hydrochloric acid, increases production cost, seriously constrains the development of enterprise.As environmental requirement is higher and higher,
New environmental law is harsher to hydrogen chloride tail gas discharge standard, and traditional potassium acid sulfate technique will guarantee hydrogen chloride tail gas qualification
Premise, must just reduce device load.Even if the qualified discharge of hydrogen chloride tail gas processing, cannot still reach and not discharge completely, have
Discharge just has pollution.
Summary of the invention
The purpose of the present invention is adopt in view of the above problems, provide a kind of production of sulfur-based compound fertilizer method of no by-product hydrochloric acid
With potassium chloride and ammonium sulfate metathesis reaction preparing potassium sulfate ammonium, traditional potassium acid sulfate is substituted.Entire production process is not related to
Sulfuric acid does not generate hydrochloric acid or hydrogen chloride.
Technical solution of the present invention:
A kind of production of sulfur-based compound fertilizer method of no by-product hydrochloric acid, the method are that potassium chloride and ammonium sulfate metathesis reaction are produced
Phosphoric acid is added after ammonium sulfate and is mixed to get mixed slurry, is passed through ammonia neutralization, adds the substance for adjusting the ratio of nitrogen, phosphorus, potassium, warp
Granulation obtains S-based compound fertilizer.It comprises the following processes:
1) potassium chloride, ammonium sulfate, water mix, and filter out solid after reactive crystallization, are potassium-ammonium sulfate, and filter liquor is ammonium chloride,
Ammonium chloride concentrating filter liquor obtains ammonium chloride.
2) potassium-ammonium sulfate in step 1) is added phosphoric acid and is mixed to get mixed slurry；
3) mixed slurry in step 2 is added ammonia and neutralizes, and obtains neutralize slip；
4) substance for adjusting the ratio of nitrogen, phosphorus, potassium is added in the neutralize slip in step 3), and it is multiple then to obtain finished product sulfenyl through granulation
Hefei.
Preferably, potassium chloride, ammonium sulfate, water quality ratio are 1:(0.5-2.5 in the step 1)): (1-2).
Preferably, obtained potassium-ammonium sulfate crystallizes K in the step 1)2O content is in 20%-50%, and nitrogen content is in 1.5%-
15%, chlorinity is less than 3%.
Preferably, in the step 1) potassium chloride, ammonium sulfate, water charging sequence are as follows: first with water dissolve ammonium sulfate, then
Potassium chloride is added.But not limited to this sequence.
Preferably, the step 1) reaction condition are as follows: 20-60 DEG C of temperature, time 30-120min.Mainly for energy conservation.
Preferably, the substance that the step 4) adjusts the ratio of nitrogen, phosphorus, potassium includes urea, potassium sulfate, monoammonium phosphate, phosphorus
Acid dihydride potassium or other or combinations thereof.
It is further preferred that the method also includes in the component, step (2) by adjusting potassium-ammonium sulfate in step (1)
Urea in the dosage, step (4) of ammonia in the dosage of phosphoric acid, step (3), potassium sulfate, monoammonium phosphate, potassium dihydrogen phosphate or other or
The dosage of a combination thereof adjusts the content of nitrogen, phosphorus, potassium in S-based compound fertilizer.
The present invention has the beneficial effect that:
1, using potassium chloride and ammonium sulfate metathesis reaction preparing potassium sulfate ammonium, traditional potassium acid sulfate is substituted.Entirely produced
Journey is not related to sulfuric acid, does not generate hydrochloric acid or hydrogen chloride, and reaction does not need steam or other external sources.It can solve hydrogen chloride tail
The exceeded problem of gas, the present invention are not related to sulfuric acid, and reflection is mild, discharges without hydrogen chloride tail gas, safe and environment-friendly, energy saving.
2, a large amount of ammonium sulfate on existing market can be made full use of, the dosage of gas ammonia in S-based compound fertilizer is reduced, into one
Step reduces cost.
3, the problem of it is unsalable to can solve by-product hydrochloric acid surplus, restricts the low production of S-based compound fertilizer device driving rate.
4, in the step 1) potassium chloride, ammonium sulfate, water charging sequence are as follows: first with water dissolve ammonium sulfate, be then added
Potassium chloride.The reaction time can be greatly shortened.
Detailed description of the invention
Fig. 1 is flow diagram of the invention.
Specific embodiment
Below with reference to embodiment, the present invention is further illustrated, but protection scope of the present invention is not limited to that.
Embodiment 1
Potassium chloride, ammonium sulfate, water 1:0.9:2 in mass ratio are mixed, the potassium sulfate filtered after 25 DEG C of reactive crystallization 30min of room temperature
Ammonium analyzes K in potassium-ammonium sulfate2O content 45%, N content 3.5%, Cl content 2%.Filter liquor is concentrated to obtain ammonium chloride.1 equivalent
Potassium-ammonium sulfate is added phosphoric acid and (presses P2O5Meter) 0.58 equivalent, it is mixed to get mixed slurry.Mixed slurry is added in 0.2 equivalent gas ammonia
With obtain neutralize slip.0.23 equivalent urea, 0.85 equiv. sulfuric acid ammonium is added in neutralize slip, then obtains finished product sulphur through being granulated
Base composite fertilizer.
Detected N content in the S-based compound fertilizer are as follows: 13.8%；P2O5Content are as follows: 17.2%；K2O content are as follows: 14.0%；Cl
Content are as follows: 0.9%.
Embodiment 2
Potassium chloride, ammonium sulfate, water 1:1.7:1.6 in mass ratio are mixed, the sulfuric acid filtered after 25 DEG C of reactive crystallization 45min of room temperature
Potassium ammonium analyzes K in potassium-ammonium sulfate2O content 25%, N content 11.5%, Cl content 1.6%.Filter liquor is concentrated to obtain ammonium chloride.
1 equiv. sulfuric acid potassium ammonium is added phosphoric acid and (presses P2O5Meter) 0.32 equivalent, it is mixed to get mixed slurry.0.11 equivalent is added in mixed slurry
Gas ammonia neutralizes, and obtains neutralize slip.0.13 equivalent urea, 0.15 equiv. sulfuric acid ammonium is added in neutralize slip, then obtains through being granulated
Finished product S-based compound fertilizer.
Detected N content in the S-based compound fertilizer are as follows: 14.0%；P2O5Content are as follows: 16.9%；K2O content are as follows: 14.1%；Cl
Content are as follows: 0.6%.
Embodiment 3
Potassium chloride, ammonium sulfate, water 1:2:1.5 in mass ratio are mixed, the potassium sulfate filtered after 25 DEG C of reactive crystallization 60min of room temperature
Ammonium analyzes K in potassium-ammonium sulfate2O content 22.5%, N content 12.5%, Cl content 1.5%.Filter liquor is concentrated to obtain ammonium chloride.
1 equiv. sulfuric acid potassium ammonium is added phosphoric acid and (presses P2O5Meter) 0.29 equivalent, it is mixed to get mixed slurry.0.1 equivalent gas is added in mixed slurry
Ammonia neutralizes, and obtains neutralize slip.0.12 equivalent urea, 0.1 equiv. sulfuric acid ammonium is added in neutralize slip, then obtains finished product through being granulated
S-based compound fertilizer.
Detected N content in the S-based compound fertilizer are as follows: 14.1%；P2O5Content are as follows: 16.7%；K2O content are as follows: 14.3%；Cl
Content are as follows: 0.6%.
Embodiment 4
Potassium chloride, ammonium sulfate, water 1:1.5:2 in mass ratio are mixed, the potassium sulfate filtered after 25 DEG C of reactive crystallization 90min of room temperature
Ammonium analyzes K in potassium-ammonium sulfate2O content 30%, N content 9.5%, Cl content 0.9%.Filter liquor is concentrated to obtain ammonium chloride.1 works as
It measures potassium-ammonium sulfate and phosphoric acid is added (by P2O5Meter) 0.39 equivalent, it is mixed to get mixed slurry.0.14 equivalent gas ammonia is added in mixed slurry
It neutralizes, obtains neutralize slip.0.16 equivalent urea, 0.45 equiv. sulfuric acid ammonium is added in neutralize slip, then obtains finished product through being granulated
S-based compound fertilizer.
Detected N content in the S-based compound fertilizer are as follows: 14.3%；P2O5Content are as follows: 16.8%；K2O content are as follows: 14.0%；Cl
Content are as follows: 0.4%.
The above embodiments are only the preferred technical solution of the present invention, and are not construed as limitation of the invention, this Shen
Please in embodiment and embodiment in feature in the absence of conflict, can mutual any combination.Protection model of the invention
The technical solution that should be recorded with claim is enclosed, the equivalent replacement side of technical characteristic in the technical solution recorded including claim
Case is protection scope.Equivalent replacement i.e. within this range is improved, also within protection scope of the present invention.
Claims (8)
1. a kind of production of sulfur-based compound fertilizer method of no by-product hydrochloric acid, it is characterised in that: the method is potassium chloride and ammonium sulfate
After metathesis reaction preparing potassium sulfate ammonium be added phosphoric acid be mixed to get mixed slurry, be passed through ammonia neutralization, add adjust nitrogen, phosphorus,
The substance of the ratio of potassium obtains S-based compound fertilizer through being granulated.
2. the method according to claim 1, wherein described method includes following steps:
1) potassium chloride, ammonium sulfate, water mixing, filter out solid after reaction, crystallize for potassium-ammonium sulfate；
2) potassium-ammonium sulfate in step 1) is added phosphoric acid and is mixed to get mixed slurry；
3) mixed slurry in step 2 is added ammonia and neutralizes, and obtains neutralize slip；
4) substance for adjusting the ratio of nitrogen, phosphorus, potassium is added in the neutralize slip in step 3), and it is multiple then to obtain finished product sulfenyl through granulation
Hefei.
3. according to the method described in claim 2, it is characterized by: potassium chloride, ammonium sulfate, water quality ratio are in the step 1)
1:(0.5-2.5): (1-2).
4. according to the method described in claim 2, it is characterized by: obtained potassium-ammonium sulfate crystallizes K in the step 1)2O contains
Amount is in 20%-50%, and nitrogen content is in 1.5%-15%, and chlorinity is less than 3%.
5. according to the method described in claim 2, it is characterized by: the step 1) filter liquor is ammonium chloride filtrate, chlorination
Ammonium concentrating filter liquor obtains ammonium chloride.
6. according to the method described in claim 2, it is characterized by: the step 1) reaction condition are as follows: 20-60 DEG C of temperature, when
Between be 30-120min.
7. according to the method described in claim 2, it is characterized by: the step 4) adjusts the substance packet of the ratio of nitrogen, phosphorus, potassium
Include urea, potassium sulfate, monoammonium phosphate, potassium dihydrogen phosphate or other or combinations thereof.
8. according to the method described in claim 7, it is characterized by: the method also includes by adjusting sulfuric acid in step (1)
Urea, potassium sulfate, phosphoric acid one in the dosage, step (4) of ammonia in the dosage, step (3) of phosphoric acid in the component of potassium ammonium, step (2)
Ammonium, potassium dihydrogen phosphate or other or combinations thereof dosage, adjust S-based compound fertilizer in nitrogen, phosphorus, potassium content.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811419247.1A CN109232063A (en) | 2018-11-26 | 2018-11-26 | A kind of production of sulfur-based compound fertilizer method of no by-product hydrochloric acid |
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| CN201811419247.1A CN109232063A (en) | 2018-11-26 | 2018-11-26 | A kind of production of sulfur-based compound fertilizer method of no by-product hydrochloric acid |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112430148A (en) * | 2020-11-06 | 2021-03-02 | 湖北三宁化工股份有限公司 | Production method of sulfur-based compound fertilizer without potassium chloride low-temperature conversion process |
-
2018
- 2018-11-26 CN CN201811419247.1A patent/CN109232063A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112430148A (en) * | 2020-11-06 | 2021-03-02 | 湖北三宁化工股份有限公司 | Production method of sulfur-based compound fertilizer without potassium chloride low-temperature conversion process |
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Application publication date: 20190118 |