CN106810321A

CN106810321A - A kind of molten sulfur is added to the device and method of production sulfur-bearing phosphate fertilizer in gas phase

Info

Publication number: CN106810321A
Application number: CN201710044299.4A
Authority: CN
Inventors: 魏正坤; 王煜; 王永宏; 韦伟文; 陈鑫; 李财红; 王婷婷; 王毕健
Original assignee: Yunnan Three Circles Sinochem Fertilizers Co Ltd
Current assignee: Yunnan Three Circles Sinochem Fertilizers Co Ltd
Priority date: 2017-01-21
Filing date: 2017-01-21
Publication date: 2017-06-09
Anticipated expiration: 2037-01-21
Also published as: CN106810321B

Abstract

It is added in gas phase the device and method for producing sulfur-bearing phosphate fertilizer, including comminutor, drying machine, the first phase chamber and the cyclone separator being sequentially connected the invention provides a kind of molten sulfur, cyclone separator is connected with comminutor by return conveyer；The first molten sulfur shower nozzle is provided with first phase chamber.Phosphate fertilizer is through granulating, drying; drying machine blows to the first phase chamber phosphate fertilizer dust; molten sulfur atomizing particle is sprayed using the first molten sulfur shower nozzle form sulphur phosphorus particle with phosphate fertilizer dust bonding; sulphur phosphorus particle is blowed to cyclone separator in the lump together with gas phase; by centrifugation, sedimentation; sulphur phosphorus particle sends back comminutor, and sulfur-bearing phosphate fertilizer is mixed to get with the phosphate fertilizer in comminutor；The gas-phase transport isolated to tail gas absorber is discharged after being absorbed and being purified.The beneficial effects of the invention are as follows：Process is simple, balling ratio is high, and returning charge is few, and dust is few, safety and environmental protection.

Description

A kind of molten sulfur is added to the device and method of production sulfur-bearing phosphate fertilizer in gas phase

Technical field

The invention belongs to production of phosphate fertilizer technical field, and in particular to a kind of molten sulfur produces sulfur-bearing phosphate fertilizer in being added to gas phase Device and method.

Background technology

Sulphur be plant necessary to one of main nutrient elements, nutrition can be provided directly to crop, can also improve crop to nitrogen With the utilization rate of phosphorus, so as to increase the yield of crops.With the raising of agricultural productivity, need of the crop to all nutrients Ask also corresponding increase.After meeting high crop yield needs in particular with raising nitrogen, phosphorus, potassium Fertilization Level, sulphur has become crop The fourth-largest main nutrient elements.Sulfur dioxide is always the main source of sulphur needed for plant growth for many years, and with dioxy Change the reduction year by year of sulfur emissions, can be that the sulphur that provides of crops is also fewer and feweri, this trend adds with environmental pollution improvement It is strong and increasingly serious.And, with the increase and the decline of soil organism level of high concentration fertilizer amount of application, sulphur contains in soil The reduction of amount makes it increasingly become the key factor that restriction crop yield is improved.Sulphur ammonium and calcium superphosphate be at present in the world The sulfur-containing fertilizer applied extensively, applies about 10,000,000 tons of sulphur every year, accounts for and applies the 83% of sulphur total amount.These traditional sulfur-containing fertilizers Because of limits throughput, its supply will be with the competition of fertilizer variety and reduce.This kind of fertilizer, including potassium sulfate is defined as " sulphur Hydrochlorate base manure material ", another kind of sulfur fertilizer is " sulphur base sulfur fertilizer ".In recent years, new sulphur sulfur fertilizer is continuous complete because production technology It is apt to and causes extensive concern.

According to estimates, up to 400,000 sq-kms, the demand of sulfur fertilizer is up to 1,200,000 tons to Chinese a lack of sulfur soil erosion, by reasonable Calculated using sulfur fertilizer crop yield 10%, can produced more food 24,000,000 tons, reduce 1,200,000 tons of loss of nitrogen fertilizer.But it is noted that The amount of recommending of Chinese sulfur fertilizer is generally 2~8 grams/m, and should according to soil sulphur fertility and Different Crop to sulphur not Change with demand, it is necessary to more effectively using limited sulfur fertilizer resource, both prevented regional sulphur to lack, unreasonable making is prevented again With sulfur fertilizer, planned control sulfur fertilizer to produce, distribute and use, promote balance fertilizing to improve Application techniques.

Area serious for a lack of sulfur is such special, it is necessary to containing 10 even sulphur nutrients of more than 18 in ammophos Ammonium phosphate product, takes traditional sulfate to provide nutrient, can not meet requirement, it is well known that sulphur nutrient is with simple substance The content of sulphur is calculated, and sulfate salt extraction efficiency is too low, and excessive sulfate is added in phosphorus ammonium, can influence ammonium phosphate product Granulation, balling ratio step-down, dust is big, most economical fast the problems such as returning charge is more, therefore for production sulfur-bearing or ammonium phosphate sulfate product high The mode of speed is the sulfur content for adding sulphur to lift ammonium phosphate product.How ammophos are added to by sulphur is safe and effective In product, as the problem that must currently solve.

The content of the invention

Asked to solve that existing process adds the granulation of sulfate influence phosphorus ammonium, the reduction of phosphorus ammonium balling ratio, dust is big, returning charge is more etc. Topic, the device and method for producing sulfur-bearing phosphate fertilizer are added in gas phase it is an object of the invention to provide a kind of molten sulfur.

The present invention is achieved through the following technical solutions：Along the direction of transfer of phosphate fertilizer, comminutor, drying machine, screening Machine, fluid bed, parcel cylinder are sequentially connected；In addition, the gas outlet of above-mentioned drying machine is connected with the air inlet of the first phase chamber, it is above-mentioned The gas outlet of the first phase chamber is connected with the air inlet of cyclone separator, the material outlet of above-mentioned cyclone separator and above-mentioned granulation Machine is connected by return conveyer；Be provided with the first molten sulfur shower nozzle in above-mentioned first phase chamber, above-mentioned first molten sulfur shower nozzle with it is first-class Gauge is connected.

Preferably, the gas outlet of above-mentioned fluid bed is connected the present invention with the air inlet of the second phase chamber, above-mentioned second gas phase The gas outlet of room is connected with the air inlet of above-mentioned cyclone separator；The second molten sulfur shower nozzle is provided with above-mentioned second phase chamber, it is above-mentioned Second molten sulfur shower nozzle is connected with second flowmeter.

Preferably, the gas outlet of above-mentioned comminutor is connected the present invention with the air inlet of the 3rd phase chamber, above-mentioned 3rd gas phase The gas outlet of room is connected with the air inlet of above-mentioned cyclone separator；The 3rd molten sulfur shower nozzle is provided with above-mentioned 3rd phase chamber, it is above-mentioned 3rd molten sulfur shower nozzle is connected with the 3rd flowmeter.

Preferably, above-mentioned first phase chamber, above-mentioned second phase chamber, above-mentioned 3rd phase chamber are internal diameter 1500mm to the present invention The cylindrical structure of~2000mm；Above-mentioned first molten sulfur shower nozzle, above-mentioned second molten sulfur shower nozzle, above-mentioned 3rd molten sulfur shower nozzle are spiral Shower nozzle.

Preferably, the gas outlet of above-mentioned cyclone separator is connected the present invention with the air inlet of tail gas absorber, above-mentioned tail gas Absorber is provided with blow-down pipe.

A kind of method that molten sulfur is added to production sulfur-bearing phosphate fertilizer in gas phase, step includes：

S1. after phosphate fertilizer being delivered into above-mentioned granulator granulation, then above-mentioned drying machine drying is delivered to, above-mentioned drying machine will contain The gas phase for having phosphate fertilizer dust is blown to above-mentioned first phase chamber；

S2. molten sulfur is passed through toward above-mentioned first molten sulfur shower nozzle, adjusts above-mentioned first flowmeter control molten sulfur flow, above-mentioned first Molten sulfur shower nozzle is to penetrating molten sulfur atomizing particle in above-mentioned first phase chamber, the phosphate fertilizer dust bonding in molten sulfur atomizing particle and gas phase Form sulphur phosphorus particle；

S3. the sulphur phosphorus particle and gas phase in above-mentioned first phase chamber are blown in above-mentioned cyclone separator, through centrifugation, are sunk Drop, sulphur phosphorus particle and gas phase in above-mentioned first phase chamber are separated；

S4. the above-mentioned sulphur phosphorus particle after separating sends back above-mentioned comminutor through above-mentioned return conveyer, and with above-mentioned comminutor In phosphate fertilizer be mixed to get sulfur-bearing phosphate fertilizer.

The present invention preferably, also including step：

S5. above-mentioned sulfur-bearing phosphate fertilizer is transported to above-mentioned drying machine by above-mentioned comminutor, then is transported to by above-mentioned drying machine above-mentioned Screening machine is sieved；

S6. above-mentioned sulfur-bearing phosphate fertilizer after screening is delivered to above-mentioned fluid bed carries out fluidization treatment；

S7. above-mentioned parcel cylinder is delivered to through the above-mentioned sulfur-bearing phosphate fertilizer after fluidization treatment carries out particle parcel, gets product.

The present invention preferably, also including step：

S8. the gas phase containing phosphate fertilizer dust is blown to above-mentioned second phase chamber in above-mentioned fluid bed；

S9. molten sulfur is passed through toward above-mentioned second molten sulfur shower nozzle, adjusts above-mentioned second flowmeter control molten sulfur flow, above-mentioned second Molten sulfur shower nozzle is to penetrating molten sulfur atomizing particle in above-mentioned second phase chamber, the phosphate fertilizer dust bonding in molten sulfur atomizing particle and gas phase Form sulphur phosphorus particle；

S10. the sulphur phosphorus particle and gas phase in above-mentioned second phase chamber are blown in above-mentioned cyclone separator, through centrifugation, are sunk Drop, sulphur phosphorus particle and gas phase in above-mentioned second phase chamber are separated；

S11. the gas phase containing phosphate fertilizer dust is blown to above-mentioned 3rd phase chamber in above-mentioned comminutor；

S12. molten sulfur is passed through toward above-mentioned 3rd molten sulfur shower nozzle, adjusts above-mentioned 3rd molten sulfur shower nozzle control molten sulfur flow, it is above-mentioned 3rd molten sulfur shower nozzle is to penetrating molten sulfur atomizing particle in above-mentioned 3rd phase chamber, the phosphate fertilizer dust in molten sulfur atomizing particle and gas phase Bonding forms sulphur phosphorus particle；

S13. the sulphur phosphorus particle and gas phase in above-mentioned 3rd phase chamber are blown in above-mentioned cyclone separator, through centrifugation, are sunk Drop, sulphur phosphorus particle and gas phase in above-mentioned 3rd phase chamber are separated.

The present invention preferably, also including step：

S14. in gas-phase transport to the above-mentioned tail gas absorber after being separated in above-mentioned cyclone separator, after absorbing, purifying From the discharge of above-mentioned blow-down pipe.

Preferably, the size of above-mentioned molten sulfur atomizing particle is 30 μm~70 μm to the present invention, above-mentioned first phase chamber, above-mentioned the Air velocity in two phase chambers, above-mentioned 3rd phase chamber is 18m/s~31m/s.

Phosphate fertilizer is dried in after granulator granulation, being delivered to drying machine using hot blast.The gas phase of drying machine discharge In contain substantial amounts of phosphate fertilizer dust, phosphate fertilizer dust is blowed to the first phase chamber, using the first molten sulfur shower nozzle spray it is tiny Molten sulfur atomizing particle, makes molten sulfur atomizing particle form sulphur phosphorus particle with phosphate fertilizer dust bonding, and sulphur phosphorus particle blows in the lump together with gas phase In delivering to cyclone separator.By the centrifugal action of cyclone separator, sulphur phosphorus particle settles down, and is sent back by return conveyer Phosphate fertilizer in comminutor, with comminutor is mixed to get sulfur-bearing phosphate fertilizer；The gas-phase transport isolated to tail gas absorber is absorbed After purification, the tail gas for reaching discharge standard is discharged by blow-down pipe, and environment will not be polluted.

The continuation of sulfur-bearing phosphate fertilizer is transported to screening machine and is sieved by comminutor, and granular size meets the sulfur-bearing phosphorus of technological requirement Fertilizer is transported to fluid bed and carries out fluidization treatment, sulfur-bearing phosphate fertilizer is met granularity requirement, is finally delivered to parcel cylinder to graininess Sulfur-bearing phosphate fertilizer carry out top layer parcel, get product.

During sulfur-bearing phosphate fertilizer carries out fluidization treatment, the second phase chamber also can be set, make containing for fluid bed blowout The gas phase of phosphate fertilizer dust delivers to the second phase chamber, carries out secondary spraying, and spraying tiny molten sulfur using the second molten sulfur shower nozzle is atomized Particle, makes molten sulfur atomizing particle form sulphur phosphorus particle with phosphate fertilizer dust bonding, and sulphur phosphorus particle is blowed to whirlwind in the lump together with gas phase In separator.By the centrifugal action of cyclone separator, sulphur phosphorus particle is settled down, and comminutor is sent back by return conveyer, Sulfur-bearing phosphate fertilizer is mixed to get with the phosphate fertilizer in comminutor；The gas-phase transport isolated is absorbed and is purified to tail gas absorber Afterwards, the tail gas for reaching discharge standard is discharged by blow-down pipe, and environment will not be polluted.

Phase chamber air flow rate 20 × 10⁴m³/ h, when phase chamber internal diameter is DN2000, then air velocity=20 × 10⁴/ 3.14×(2/2)²=18m/s；When phase chamber internal diameter is DN1500, then air velocity=20 × 10⁴/3.14×(1.5/2)²= 31m/s, phase chamber internal diameter is smaller, and air velocity is bigger, and phase chamber internal diameter is with air-flow velocity inversely.

Molten sulfur shower nozzle uses spiral nozzle, and molten sulfur atomizing particle size is controlled between 30 to 70 microns, by nozzle Peptizaiton, is sprayed onto comminutor, drying machine, fluid bed outlet phase chamber, via the bottom-up gas for being more than 15 meter per seconds by molten sulfur Molten sulfur particle is all blown to cyclone dust collectors by stream in the same direction, then is delivered to comminutor by return conveyer, by granulation, dry Sulfur-bearing phosphate fertilizer product.

When molten sulfur addition is more than 35g/m per hour³, it may occur that blast, therefore drying machine, fluid bed, comminutor Maximum is 35g/m to each outlet phase chamber molten sulfur addition per hour³×20×10⁴=7 tons.The single gas phase of monoammonium phosphate device It is 3.5m that pipe molten sulfur adds maximum³× 1.7788=6.2 tons, if total molten sulfur addition is per hour more than 3.5m³When, then it is necessary Multiple addition points (drying machine or fluid bed or comminutor) are divided to add, so as to prevent dust explosion.

Molten sulfur sprays into rear all gaseous states in gas phase pipeline, will not become liquid, according to heat balance：Molten sulfur is added most Largely × specific heat × temperature difference=gas phase adds maximum × specific heat × temperature difference, then and 6.2 × 10³kg/h×0.96kJ/kg·℃× (140-85) DEG C=20 × 10⁴m³/h×0.95kg/m³×0.255kJ/kg·℃×(X-85)℃

X is the gas temperature after molten sulfur cooling heat release heating phase chamber gas, then phase chamber gas maximum temperature is 92 DEG C. If temperature is more than 114 DEG C in phase chamber, molten sulfur little particle can just become liquid, and phase chamber gas maximum temperature is 92 DEG C, Therefore all gaseous states of molten sulfur little particle in phase chamber, same by molten sulfur particle via the bottom-up air-flow for being more than 15 meter per seconds Cyclone dust collectors are blown to whole, then comminutor is delivered to by return conveyer, by granulation, dry sulfur-bearing phosphate fertilizer product.

The present invention can at least reach less than one beneficial effect：

1. process is simple, can obtain sulfur-bearing phosphate fertilizer in the case of being adjusted on a small quantity to existing production line；

2. the normal prilling of phosphorus ammonium is not influenceed, and sulfur-bearing phosphate fertilizer balling ratio is high；

3., by spraying molten sulfur atomizing particle, both inhibited the dust pollution in production process, improve again phosphate fertilizer into Product rate；

4. production efficiency is high, and returning charge is few；

5. production process safety, molten sulfur spray amount is adjusted by flowmeter, controls phosphate fertilizer dust content, without sulfur burning and Risk of explosion；

6. the ammonium phosphate product of different sulfur contents can be produced according to fertilizer nutrient, will not the original ammophos of excess dilution support Point；

7. exhaust emissions does not pollute the environment, safety and environmental protection.

Brief description of the drawings

Fig. 1 is schematic flow sheet of the invention.

Each sequence number and its correspondence title are as follows in accompanying drawing：

Comminutor 1, drying machine 2, the first phase chamber 3, cyclone separator 4, return conveyer 5, the first molten sulfur shower nozzle 6, first Flowmeter 7, screening machine 8, fluid bed 9, parcel cylinder 10, the second phase chamber 11, the second molten sulfur shower nozzle 12, second flowmeter 13, tail Aspiration device 14, the 3rd phase chamber 15, the 3rd molten sulfur shower nozzle 16, the 3rd flowmeter 17.

Specific embodiment

Explanation that the present invention will be further explained below in conjunction with the accompanying drawings.

As shown in figure 1, the equipment that a kind of molten sulfur is added to production sulfur-bearing phosphate fertilizer in gas phase, along the direction of transfer of phosphate fertilizer, makes Grain machine 1, drying machine 2, screening machine 8, fluid bed 9, parcel cylinder 10 are sequentially connected.

Embodiment 1

The gas outlet of above-mentioned drying machine 2 is connected with the air inlet of the first phase chamber 3, the gas outlet of above-mentioned first phase chamber 3 Air inlet with cyclone separator 4 is connected, and the material outlet of above-mentioned cyclone separator 4 passes through return conveyer 5 with above-mentioned comminutor 1 Connection；The first molten sulfur shower nozzle 6 is provided with above-mentioned first phase chamber 3, above-mentioned first molten sulfur shower nozzle 6 is connected with first flowmeter 7.

Step includes：

S1. phosphate fertilizer is delivered to after above-mentioned comminutor 1 granulates, then is delivered to above-mentioned drying machine 2 and dried, above-mentioned drying machine 2 Gas phase containing phosphate fertilizer dust is blown to above-mentioned first phase chamber 3；

S2. it is passed through molten sulfur toward above-mentioned first molten sulfur shower nozzle 6, adjusts the above-mentioned control of first flowmeter 7 molten sulfur flow, above-mentioned the One molten sulfur shower nozzle 6 is to penetrating molten sulfur atomizing particle in above-mentioned first phase chamber 3, the phosphate fertilizer dust in molten sulfur atomizing particle and gas phase Bonding forms sulphur phosphorus particle；

S3. the sulphur phosphorus particle and gas phase in above-mentioned first phase chamber 3 are blown in above-mentioned cyclone separator 4, through centrifugation, are sunk Drop, sulphur phosphorus particle and gas phase in above-mentioned first phase chamber 3 are separated；

S4. the above-mentioned sulphur phosphorus particle after separating sends back above-mentioned comminutor 1 through above-mentioned return conveyer 5, and with above-mentioned granulation Phosphate fertilizer in machine 1 is mixed to get sulfur-bearing phosphate fertilizer.

Embodiment 2

The gas outlet of above-mentioned fluid bed 9 is connected with the air inlet of the second phase chamber 11, the outlet of above-mentioned second phase chamber 11 Mouth is connected with the air inlet of above-mentioned cyclone separator 4；The second molten sulfur shower nozzle 12, above-mentioned second are provided with above-mentioned second phase chamber 11 Molten sulfur shower nozzle 12 is connected with second flowmeter 13.

Step includes：

S4. the above-mentioned sulphur phosphorus particle after separating sends back above-mentioned comminutor 1 through above-mentioned return conveyer 5, and with above-mentioned granulation Phosphate fertilizer in machine 1 is mixed to get sulfur-bearing phosphate fertilizer；

S5. above-mentioned sulfur-bearing phosphate fertilizer is transported to above-mentioned drying machine 2 by above-mentioned comminutor 1, then is transported to by above-mentioned drying machine 2 Screening machine 8 is stated to be sieved；

S6. above-mentioned sulfur-bearing phosphate fertilizer after screening is delivered to above-mentioned fluid bed 9 carries out fluidization treatment；

S7. above-mentioned parcel cylinder 10 is delivered to through the above-mentioned sulfur-bearing phosphate fertilizer after fluidization treatment carries out particle parcel, gets product.

Embodiment 3

The gas outlet of above-mentioned comminutor 1 is connected with the air inlet of the 3rd phase chamber 15, the outlet of above-mentioned 3rd phase chamber 15 Mouth is connected with the air inlet of above-mentioned cyclone separator 4；The 3rd molten sulfur shower nozzle 16, the above-mentioned 3rd are provided with above-mentioned 3rd phase chamber 15 Molten sulfur shower nozzle 16 is connected with the 3rd flowmeter 17.

Step includes：

S7. above-mentioned parcel cylinder 10 is delivered to through the above-mentioned sulfur-bearing phosphate fertilizer after fluidization treatment carries out particle parcel, gets product；

S8. the gas phase containing phosphate fertilizer dust is blown to above-mentioned second phase chamber 11 in above-mentioned fluid bed 9；

S9. molten sulfur is passed through toward above-mentioned second molten sulfur shower nozzle 12, adjusts the above-mentioned control of second flowmeter 13 molten sulfur flow, it is above-mentioned Second molten sulfur shower nozzle 12 is to penetrating molten sulfur atomizing particle in above-mentioned second phase chamber 11, the phosphate fertilizer in molten sulfur atomizing particle and gas phase Dust bonding forms sulphur phosphorus particle；

S10. the sulphur phosphorus particle and gas phase in above-mentioned second phase chamber 11 are blown in above-mentioned cyclone separator 4, through being centrifuged, Sedimentation, sulphur phosphorus particle and gas phase in above-mentioned second phase chamber 11 are separated；

S11. the gas phase containing phosphate fertilizer dust is blown to above-mentioned 3rd phase chamber 15 in above-mentioned comminutor 1；

S12. molten sulfur is passed through toward above-mentioned 3rd molten sulfur shower nozzle 16, adjusts the above-mentioned control of 3rd molten sulfur shower nozzle 16 molten sulfur flow, Above-mentioned 3rd molten sulfur shower nozzle 16 is in spraying into molten sulfur atomizing particle, molten sulfur atomizing particle and gas phase in above-mentioned 3rd phase chamber 15 Phosphate fertilizer dust bonding forms sulphur phosphorus particle；

S13. the sulphur phosphorus particle and gas phase in above-mentioned 3rd phase chamber 15 are blown in above-mentioned cyclone separator 4, through being centrifuged, Sedimentation, sulphur phosphorus particle and gas phase in above-mentioned 3rd phase chamber 15 are separated.

Embodiment 4

Above-mentioned first phase chamber 3, above-mentioned second phase chamber 11, above-mentioned 3rd phase chamber 15 are the cylinder knot of internal diameter 1500mm Structure；Above-mentioned first molten sulfur shower nozzle 6, above-mentioned second molten sulfur shower nozzle 12, above-mentioned 3rd molten sulfur shower nozzle 16 are spiral nozzle.

Step includes：

S13. the sulphur phosphorus particle and gas phase in above-mentioned 3rd phase chamber 15 are blown in above-mentioned cyclone separator 4, through being centrifuged, Sedimentation, sulphur phosphorus particle and gas phase in above-mentioned 3rd phase chamber 15 are separated；

S14. in gas-phase transport to the above-mentioned tail gas absorber 14 after being separated in above-mentioned cyclone separator 4, through absorbing, purifying Discharged from above-mentioned blow-down pipe afterwards.

Embodiment 5

Above-mentioned first phase chamber 3, above-mentioned second phase chamber 11, above-mentioned 3rd phase chamber 15 are the cylinder knot of internal diameter 2000mm Structure；Above-mentioned first molten sulfur shower nozzle 6, above-mentioned second molten sulfur shower nozzle 12, above-mentioned 3rd molten sulfur shower nozzle 16 are spiral nozzle.

The gas outlet of above-mentioned cyclone separator 4 is connected with the air inlet of tail gas absorber 14, in above-mentioned tail gas absorber 14 It is provided with blow-down pipe.

Step includes：

The ammophos of sulfur-bearing 5% are prepared, molten sulfur flow is 1.5m³/ h, the first phase chamber 3, the second phase chamber the 11, the 3rd The internal diameter of phase chamber 15 is 2000mm, and the first molten sulfur shower nozzle 6, the second molten sulfur shower nozzle 12, the 3rd molten sulfur shower nozzle 16 are spiral Shower nozzle, the size of molten sulfur atomizing particle is 70 μm, the gas velocity in the first phase chamber 3, the second phase chamber 11, the 3rd phase chamber 15 Degree is 18m/s.

Sulfur-bearing phosphate fertilizer analysis result is as follows：

Embodiment 6

Step includes：

The ammophos of sulfur-bearing 8% are prepared, molten sulfur flow is 2.5m³/ h, the first phase chamber 3, the second phase chamber the 11, the 3rd The internal diameter of phase chamber 15 is 2000mm, and the first molten sulfur shower nozzle 6, the second molten sulfur shower nozzle 12, the 3rd molten sulfur shower nozzle 16 are spiral Shower nozzle, the size of molten sulfur atomizing particle is 50 μm, the gas velocity in the first phase chamber 3, the second phase chamber 11, the 3rd phase chamber 15 Degree is 18m/s.

Sulfur-bearing phosphate fertilizer analysis result is as follows：

Embodiment 7

Step includes：

The ammophos of sulfur-bearing 10% are prepared, molten sulfur flow is 3m³/ h, the first phase chamber 3, the second phase chamber the 11, the 3rd The internal diameter of phase chamber 15 is 2000mm, and the first molten sulfur shower nozzle 6, the second molten sulfur shower nozzle 12, the 3rd molten sulfur shower nozzle 16 are spiral Shower nozzle, the size of molten sulfur atomizing particle is 30 μm, the gas velocity in the first phase chamber 3, the second phase chamber 11, the 3rd phase chamber 15 Degree is 18m/s.

Sulfur-bearing phosphate fertilizer analysis result is as follows：

Embodiment 8

Step includes：

The ammophos of sulfur-bearing 12% are prepared, molten sulfur flow is 3.5m³/ h, the first phase chamber 3, the second phase chamber 11, The internal diameter of three phase chambers 15 is 2000mm, and the first molten sulfur shower nozzle 6, the second molten sulfur shower nozzle 12, the 3rd molten sulfur shower nozzle 16 are spiral shell Cyclone nozzle, the size of molten sulfur atomizing particle is 40 μm, the air-flow in the first phase chamber 3, the second phase chamber 11, the 3rd phase chamber 15 Speed is 18m/s.

Sulfur-bearing phosphate fertilizer analysis result is as follows：

Embodiment 9

Step includes：

The ammophos of sulfur-bearing 15% are prepared, molten sulfur flow is 4.5m³/ h, the first phase chamber 3, the second phase chamber 11, The internal diameter of three phase chambers 15 is 2000mm, and the first molten sulfur shower nozzle 6, the second molten sulfur shower nozzle 12, the 3rd molten sulfur shower nozzle 16 are spiral shell Cyclone nozzle, the size of molten sulfur atomizing particle is 60 μm, the air-flow in the first phase chamber 3, the second phase chamber 11, the 3rd phase chamber 15 Speed is 18m/s.

Sulfur-bearing phosphate fertilizer analysis result is as follows：

Embodiment 10

Step includes：

The ammophos of sulfur-bearing 20% are prepared, molten sulfur flow is 6.5m³/ h, the first phase chamber 3, the second phase chamber 11, The internal diameter of three phase chambers 15 is 2000mm, and the first molten sulfur shower nozzle 6, the second molten sulfur shower nozzle 12, the 3rd molten sulfur shower nozzle 16 are spiral shell Cyclone nozzle, the size of molten sulfur atomizing particle is 50 μm, the air-flow in the first phase chamber 3, the second phase chamber 11, the 3rd phase chamber 15 Speed is 18m/s.

Sulfur-bearing phosphate fertilizer analysis result is as follows：

Embodiment 11

Step includes：

The size of molten sulfur atomizing particle is 30 μm, the gas in the first phase chamber 3, the second phase chamber 11, the 3rd phase chamber 15 Flow velocity degree is 31m/s.

Embodiment 12

Step includes：

The size of molten sulfur atomizing particle is 70 μm, the gas in the first phase chamber 3, the second phase chamber 11, the 3rd phase chamber 15 Flow velocity degree is 31m/s.

Specifically operation principle is the present invention：

Phosphate fertilizer is dried in after the granulation of comminutor 1, being delivered to drying machine 2 using hot blast.The gas of the discharge of drying machine 2 Contain substantial amounts of phosphate fertilizer dust in phase, phosphate fertilizer dust is blowed to the first phase chamber 3, sprayed carefully using the first molten sulfur shower nozzle 6 Small molten sulfur atomizing particle, makes molten sulfur atomizing particle form sulphur phosphorus particle with phosphate fertilizer dust bonding, and sulphur phosphorus particle is together with gas phase one And blow into cyclone separator 4.By the centrifugal action of cyclone separator 4, sulphur phosphorus particle settles down, by return conveyer 5 send back comminutor 1, and sulfur-bearing phosphate fertilizer is mixed to get with the phosphate fertilizer in comminutor 1；The gas-phase transport isolated is to tail gas absorber After 14 are absorbed and purified, the tail gas for reaching discharge standard is discharged by blow-down pipe, and environment will not be polluted.

The continuation of sulfur-bearing phosphate fertilizer is transported to screening machine 8 and is sieved by comminutor 1, and granular size meets the sulfur-bearing of technological requirement Phosphate fertilizer is transported to fluid bed 9 and carries out fluidization treatment, sulfur-bearing phosphate fertilizer is met granularity requirement, is finally delivered to 10 pairs, cylinder of parcel Granular sulfur-bearing phosphate fertilizer carries out top layer parcel, gets product.

During sulfur-bearing phosphate fertilizer carries out fluidization treatment, the second phase chamber 11 also can be set, make containing for the blowout of fluid bed 9 The gas phase for having phosphate fertilizer dust delivers to the second phase chamber 11, carries out secondary spraying, and tiny liquid is sprayed using the second molten sulfur shower nozzle 12 Sulphur atomizing particle, makes molten sulfur atomizing particle form sulphur phosphorus particle with phosphate fertilizer dust bonding, and sulphur phosphorus particle is blowed in the lump together with gas phase Into cyclone separator 4.By the centrifugal action of cyclone separator 4, sulphur phosphorus particle settles down, and is transmitted by return conveyer 5 The phosphate fertilizer returned in comminutor 1, with comminutor 1 is mixed to get sulfur-bearing phosphate fertilizer；The gas-phase transport isolated to tail gas absorber 14 is entered After row absorbs and purifies, the tail gas for reaching discharge standard is discharged by blow-down pipe, and environment will not be polluted.

Above-described embodiment is presently preferred embodiments of the present invention, is not the limitation to technical solution of the present invention, is not being taken off On the premise of spirit and scope of the invention, various changes and modifications of the present invention are possible, and these changes and improvements are regarded as Fall into scope of the claimed invention.

Claims

1. the equipment that a kind of molten sulfur is added to production sulfur-bearing phosphate fertilizer in gas phase, it is characterised in that：Along the direction of transfer of phosphate fertilizer, granulation Machine (1), drying machine (2), screening machine (8), fluid bed (9), parcel cylinder (10) are sequentially connected；

In addition, the gas outlet of the drying machine (2) is connected with the air inlet of the first phase chamber (3), first phase chamber (3) Gas outlet is connected with the air inlet of cyclone separator (4), material outlet and the comminutor (1) of the cyclone separator (4) Connected by return conveyer (5)；

The first molten sulfur shower nozzle (6), the first molten sulfur shower nozzle (6) and first flowmeter (7) are provided with first phase chamber (3) Connection.

2. the equipment that a kind of molten sulfur according to claim 1 is added to production sulfur-bearing phosphate fertilizer in gas phase, it is characterised in that：Institute The gas outlet for stating fluid bed (9) is connected with the air inlet of the second phase chamber (11), the gas outlet of second phase chamber (11) with The air inlet connection of the cyclone separator (4)；

The second molten sulfur shower nozzle (12), the second molten sulfur shower nozzle (12) and second flowmeter are provided with second phase chamber (11) (13) connect.

3. the equipment that a kind of molten sulfur according to claim 2 is added to production sulfur-bearing phosphate fertilizer in gas phase, it is characterised in that：Institute The gas outlet for stating comminutor (1) is connected with the air inlet of the 3rd phase chamber (15), the gas outlet of the 3rd phase chamber (15) with The air inlet connection of the cyclone separator (4)；

The 3rd molten sulfur shower nozzle (16), the 3rd molten sulfur shower nozzle (16) and the 3rd flowmeter are provided with 3rd phase chamber (15) (17) connect.

4. the equipment that a kind of molten sulfur according to claim 3 is added to production sulfur-bearing phosphate fertilizer in gas phase, it is characterised in that：Institute It is the circle of internal diameter 1500mm~2000mm to state the first phase chamber (3), second phase chamber (11), the 3rd phase chamber (15) Barrel structure；

The first molten sulfur shower nozzle (6), the second molten sulfur shower nozzle (12), the 3rd molten sulfur shower nozzle (16) are spiral spray Head.

5. the equipment that a kind of molten sulfur according to claim 4 is added to production sulfur-bearing phosphate fertilizer in gas phase, it is characterised in that：Institute The gas outlet for stating cyclone separator (4) is connected with the air inlet of tail gas absorber (14), and the tail gas absorber (14) is provided with Blow-down pipe.

6. a kind of method that molten sulfur is added to production sulfur-bearing phosphate fertilizer in gas phase, it is characterised in that：Step includes：

S1. after phosphate fertilizer being delivered into the comminutor (1) granulation, then the drying machine (2) drying, the drying machine are delivered to (2) gas phase containing phosphate fertilizer dust is blown to first phase chamber (3)；

S2. it is passed through molten sulfur toward the first molten sulfur shower nozzle (6), adjusts first flowmeter (7) the control molten sulfur flow, described the One molten sulfur shower nozzle (6) is to penetrating molten sulfur atomizing particle in first phase chamber (3), the phosphate fertilizer in molten sulfur atomizing particle and gas phase Dust bonding forms sulphur phosphorus particle；

S3. the sulphur phosphorus particle and gas phase in first phase chamber (3) are blown in the cyclone separator (4), through centrifugation, are sunk Drop, sulphur phosphorus particle and gas phase in first phase chamber (3) are separated；

S4. the sulphur phosphorus particle after separating sends back the comminutor (1) through the return conveyer (5), and with the granulation Phosphate fertilizer in machine (1) is mixed to get sulfur-bearing phosphate fertilizer.

7. the method that a kind of molten sulfur according to claim 6 is added to production sulfur-bearing phosphate fertilizer in gas phase, it is characterised in that：Also Including step：

S5. the sulfur-bearing phosphate fertilizer is transported to the drying machine (2) by the comminutor (1), then is transported to by the drying machine (2) The screening machine (8) is sieved；

S6. the sulfur-bearing phosphate fertilizer after screening is delivered to the fluid bed (9) and carries out fluidization treatment；

S7. parcel cylinder (10) is delivered to through the sulfur-bearing phosphate fertilizer after fluidization treatment carries out particle parcel, gets product.

8. the method that a kind of molten sulfur according to claim 7 is added to production sulfur-bearing phosphate fertilizer in gas phase, it is characterised in that：Also Including step：

S8. the gas phase containing phosphate fertilizer dust is blown to second phase chamber (11) in the fluid bed (9)；

S9. molten sulfur is passed through toward the second molten sulfur shower nozzle (12), adjusts second flowmeter (13) the control molten sulfur flow, it is described Second molten sulfur shower nozzle (12) sprays into molten sulfur atomizing particle to second phase chamber (11) is middle, in molten sulfur atomizing particle and gas phase Phosphate fertilizer dust bonding forms sulphur phosphorus particle；

S10. the sulphur phosphorus particle and gas phase in second phase chamber (11) are blown in the cyclone separator (4), through being centrifuged, Sedimentation, sulphur phosphorus particle and gas phase in second phase chamber (11) are separated；

S11. the gas phase containing phosphate fertilizer dust is blown to the 3rd phase chamber (15) in the comminutor (1)；

S12. molten sulfur is passed through toward the 3rd molten sulfur shower nozzle (16), adjusts the 3rd molten sulfur shower nozzle (16) the control molten sulfur flow, The 3rd molten sulfur shower nozzle (16) is to penetrating molten sulfur atomizing particle, molten sulfur atomizing particle and gas phase in the 3rd phase chamber (15) In phosphate fertilizer dust bonding formed sulphur phosphorus particle；

S13. the sulphur phosphorus particle and gas phase in the 3rd phase chamber (15) are blown in the cyclone separator (4), through being centrifuged, Sedimentation, sulphur phosphorus particle and gas phase in the 3rd phase chamber (15) are separated.

9. the method that a kind of molten sulfur according to claim 8 is added to production sulfur-bearing phosphate fertilizer in gas phase, it is characterised in that：Also Including step：

S14. in gas-phase transport to the tail gas absorber (14) after being separated in the cyclone separator (4), through absorbing, purifying Discharged from the blow-down pipe afterwards.

10. the method that a kind of molten sulfur according to claim 9 is added to production sulfur-bearing phosphate fertilizer in gas phase, it is characterised in that： The size of the molten sulfur atomizing particle is 30 μm~70 μm, first phase chamber (3), second phase chamber (11), described Air velocity in 3rd phase chamber (15) is 18m/s~31m/s.