CN1043271A - The method of preparing spherical catalyst of synthesizing ammonia by using stationary prilling sprayer - Google Patents
The method of preparing spherical catalyst of synthesizing ammonia by using stationary prilling sprayer Download PDFInfo
- Publication number
- CN1043271A CN1043271A CN 88108726 CN88108726A CN1043271A CN 1043271 A CN1043271 A CN 1043271A CN 88108726 CN88108726 CN 88108726 CN 88108726 A CN88108726 A CN 88108726A CN 1043271 A CN1043271 A CN 1043271A
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- China
- Prior art keywords
- balling
- prilling spry
- prilling
- electric smelter
- technology
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- 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.)
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- 238000000034 method Methods 0.000 title claims abstract description 26
- QGZKDVFQNNGYKY-UHFFFAOYSA-N Ammonia Chemical compound N QGZKDVFQNNGYKY-UHFFFAOYSA-N 0.000 title claims abstract description 20
- 239000003054 catalyst Substances 0.000 title claims abstract description 15
- 229910021529 ammonia Inorganic materials 0.000 title claims abstract description 10
- 230000002194 synthesizing effect Effects 0.000 title description 2
- 239000007921 spray Substances 0.000 claims abstract description 14
- 238000001816 cooling Methods 0.000 claims abstract description 11
- PNEYBMLMFCGWSK-UHFFFAOYSA-N Alumina Chemical compound [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 claims abstract description 9
- 238000005516 engineering process Methods 0.000 claims abstract description 7
- VTYYLEPIZMXCLO-UHFFFAOYSA-L Calcium carbonate Chemical compound [Ca+2].[O-]C([O-])=O VTYYLEPIZMXCLO-UHFFFAOYSA-L 0.000 claims abstract description 6
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims abstract description 6
- FGIUAXJPYTZDNR-UHFFFAOYSA-N potassium nitrate Chemical compound [K+].[O-][N+]([O-])=O FGIUAXJPYTZDNR-UHFFFAOYSA-N 0.000 claims abstract description 6
- 230000004927 fusion Effects 0.000 claims abstract description 5
- 239000002994 raw material Substances 0.000 claims abstract description 5
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 4
- 229910000019 calcium carbonate Inorganic materials 0.000 claims abstract description 3
- 229910052742 iron Inorganic materials 0.000 claims abstract description 3
- 235000010333 potassium nitrate Nutrition 0.000 claims abstract description 3
- 239000004323 potassium nitrate Substances 0.000 claims abstract description 3
- 238000005469 granulation Methods 0.000 claims description 8
- 230000003179 granulation Effects 0.000 claims description 8
- 238000007599 discharging Methods 0.000 claims description 7
- 102100029292 Protein sprouty homolog 3 Human genes 0.000 claims description 6
- 101710082104 Protein sprouty homolog 3 Proteins 0.000 claims description 6
- 239000007788 liquid Substances 0.000 claims description 3
- 241000282326 Felis catus Species 0.000 claims 1
- 238000004519 manufacturing process Methods 0.000 abstract description 6
- 230000000694 effects Effects 0.000 abstract description 3
- 238000009776 industrial production Methods 0.000 abstract description 2
- 230000005611 electricity Effects 0.000 abstract 1
- 239000000243 solution Substances 0.000 description 4
- 239000012798 spherical particle Substances 0.000 description 4
- 239000006185 dispersion Substances 0.000 description 3
- 239000012634 fragment Substances 0.000 description 3
- 238000010438 heat treatment Methods 0.000 description 3
- 238000005245 sintering Methods 0.000 description 3
- 230000015572 biosynthetic process Effects 0.000 description 2
- 238000002474 experimental method Methods 0.000 description 2
- 239000012530 fluid Substances 0.000 description 2
- 238000002156 mixing Methods 0.000 description 2
- 239000002245 particle Substances 0.000 description 2
- 238000002360 preparation method Methods 0.000 description 2
- 238000003786 synthesis reaction Methods 0.000 description 2
- 229920002472 Starch Polymers 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 238000007667 floating Methods 0.000 description 1
- 239000008187 granular material Substances 0.000 description 1
- 229910052734 helium Inorganic materials 0.000 description 1
- 239000001307 helium Substances 0.000 description 1
- SWQJXJOGLNCZEY-UHFFFAOYSA-N helium atom Chemical compound [He] SWQJXJOGLNCZEY-UHFFFAOYSA-N 0.000 description 1
- 238000002347 injection Methods 0.000 description 1
- 239000007924 injection Substances 0.000 description 1
- 238000010297 mechanical methods and process Methods 0.000 description 1
- 238000010298 pulverizing process Methods 0.000 description 1
- 238000012216 screening Methods 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 238000007493 shaping process Methods 0.000 description 1
- 239000002002 slurry Substances 0.000 description 1
- 238000005507 spraying Methods 0.000 description 1
- 239000008107 starch Substances 0.000 description 1
- 235000019698 starch Nutrition 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
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- Catalysts (AREA)
- Glanulating (AREA)
- Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
Abstract
The present invention is that fixedly the prilling spry spray processing is made the method for spherical ammonia synthetic catalyst.Employing is a raw material with selected magnetic iron ore, aluminium oxide, potassium nitrate, calcium carbonate etc., through the electric smelter fusion, fixedly prilling spry sprays balling-up, air-flow or technical process such as water or solution cooling.Yield rate of the present invention＞80%, production technology and equipment are simple, can realize large-scale industrial production, compare with existing balling-up technology, can reduce power consumption more than 30%, and single stove production capacity can improve about 50%.Product cost is low, resistance is little, intensity is high, activity is good, produce ammonia per ton can economize on electricity more than 20 degree, can improve synthetic tower production capacity 10～20%.
Description
The present invention is a kind of Preparation of catalysts method, adopts fixedly prilling spry sprinkling balling technique, is specially adapted to the preparation of ammonia synthesis catalyst.
Before the present invention makes, people once carried out extensive studies to shaping (sphere or the Else Rule shape) method of ammonia synthesis catalyst, its process route is broadly divided into two classes: the one, and the compacting sintering forming process, promptly adopt fusion, solidify, cooling, pulverizing, press forming, form through sintering again.For example Denmark Top rope (Tops φ e) company, Switzerland card Surrey (Casale) company, English Imperial Chemical Industries (ICI) company all adopt this method, and the pan-type pelletizer balling-up of the Soviet Union.Sintering also belongs to this class technology in 1350 ℃ of helium.Their weak point is that complex process, energy consumption and cost are very high, is difficult to realize suitability for industrialized production.The 2nd, the one step forming method promptly adopts the process route of fusion, dispersion, cooling, heat treatment, screening.Mechanical dispersion and fluid dispersion method balling technique (number of patent application CN85101604A as Zhengzhou University, CN85101606A), these class methods have been simplified technology than the method for before chatting, but owing to adopt bump or impact to disperse, gained catalyst particle size inequality, the shape of product factor is less.The fragment of balling-up and smalls (microballoon that can not use for industry) are not more, thereby finished product yield not high (50～70%), and need through manually pick, time-consuming taking a lot of work, product cost and power consumption are still higher.In addition, in this technical process, pour in water or the solution, strong quick-fried spattering very easily taken place, jeopardize the person and device security because of big strand of high temperature (about 1550 ℃) fused mass arranged.
The objective of the invention is: in the landing motion process, fragment on the basis of the principle of ball and the characteristics of motion thereof studying liquid stream in great detail, adopt simple and easy and can realize the technology and the equipment of large-scale industrial production, produce spherical ammonia synthetic catalyst efficiently.
The method for preparing spherical ammonia synthetic catalyst of the present invention is: earlier with raw materials such as selected magnetic iron ore, aluminium oxide, potassium nitrate, calcium carbonate, by a certain percentage behind the mixing, insert fusion in the electric smelter 1, during discharging, the molten slurry of catalyst in the electric smelter flows into fixedly prilling spry 3 through discharging opening 2, the single stream that flow velocity that will flow out from electric smelter 1 by the fixing spray orifice 5 of prilling spry 3 bottoms and flow all change strand, become all certain multiply thread of flow and flow velocity and spray and descend, rely on the cohesiveness of himself to shorten ball into.Fixedly prilling spry 3 adopts simple mechanical method fixation, and it is 0.002～0.014 meter from distance＜2 of discharging opening 2 meter, from＜2 meters of the liquid level distances of granulation tower 4 or cooling bay 4, the diameter of spray orifice 5.The outstanding holder of the inverted draft of the spherical particles certain flow rate (less than floating velocity) in granulation tower 4 that sprays from spray orifice 5 slowly decline down.By air-flow cooling (dry method cooling), be transported to classifying screen then simultaneously; The water or other solution that perhaps directly fall into cooling bay 4 carry out hurried cooling (wet method cooling), by separation equipment ball and solution are separated, and after heat treatment deliver to classifying screen, become the spheric catalyst finished product of various different grain size grades.
Characteristics of the present invention are to adopt fixedly, and prilling spry disperses, make single stream that the flow that flows out and flow velocity all change strand a certain size spray orifice bottom fixing prilling spry from electric smelter, become all certain multiply thread of flow and flow velocity, evenly spray and descend, utilize the cohesiveness of itself to shrink balling-up, thereby institute's spherical particles particle diameter that obtains is even, the fragment that does not have not balling-up, finished product yield high especially (diameter greater than 0.002 meter reach more than 80%), thereby greatly reduce the power consumption and the cost of Catalyst Production, by changing injection diameter, very easily make needed various varigrained catalyst simultaneously.
Another characteristics of the present invention are: because the fixing spray radius very little (close with the shower nozzle internal diameter) of prilling spry, thereby required granulation tower tower diameter is very little, in granulation tower, can cause very high inverted draft (and consumption of power is very little) like this, spraying the spherical particles that gets off from shower nozzle slowly descends under the effect of high velocity air, cooled off fast by air-flow simultaneously, complete and the non-notch of prepared spheric granules, the finished form factor is near 1, the mechanical strength height, in use resistance is especially little, thereby avoided wet method balling-up (CN85101604A effectively, CN85101606A) spherical particles solidifies and in the inner entry of state whereabouts or solution of solidifying not yet in appearance in, be subjected to fluid pounding to form breach and reduced the shortcoming of form factor and mechanical strength, cast out heat treatment simultaneously and chosen the ball operation, eliminated the quick-fried generation of spattering of high temperature.Simplify technology, realized the purpose of safety, High-efficient Production, reduced power consumption and cost.
Accompanying drawing 1, fixedly prilling spry process flow diagram
Behind raw material blending, insert in the electric smelter 1, in discharging opening 2 flows into fixedly prilling spry 3, by the spray orifice 5 of shower nozzle 3 bottoms, will melt to starch and be dispersed into the multiply thread during discharging, drop in granulation tower or the cooling bay 4.
Embodiment:
50 kilovolt-amperes in electric smelter transformer of flow process of the present invention (seeing accompanying drawing 1) experiment, 0.3 * 0.2 * 0.2 meter of electric smelter
3, fixedly prilling spry 3 is to distance＜2 of discharging opening 2 meter.0.004 meter of the diameter of spray orifice 5 adds 5.0 kilograms of compounds during experiment, come out of the stove 3.421 kilograms, gets 2.88 kilograms of finished products (diameter is greater than 0.002 meter), finished product yield 84.2%, and product activity and mechanical strength reach industrial instructions for use.
Claims (1)
1, a kind of is raw material by selected magnetic iron ore, potassium nitrate, aluminium oxide, calcium carbonate etc., makes the method for spherical ammonia synthetic catalyst.Feature of the present invention is after raw material is mixed by a certain percentage, insert fusion in the electric smelter 1, adopting fixedly, prilling spry 3 sprays granulation, in granulation tower 4, cooled off or directly fall into the technology that water or solution cool off by inverted draft, make spherical ammonia synthetic catalyst (seeing accompanying drawing 1), the diameter of spray orifice 5 is 0.002～0.014 meter, and meter liquid level distance from granulation cat head or cooling bay 4 is＜2 meters from distance＜2 of electric smelter discharging opening 2.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 88108726 CN1043271A (en) | 1988-12-17 | 1988-12-17 | The method of preparing spherical catalyst of synthesizing ammonia by using stationary prilling sprayer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 88108726 CN1043271A (en) | 1988-12-17 | 1988-12-17 | The method of preparing spherical catalyst of synthesizing ammonia by using stationary prilling sprayer |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN1043271A true CN1043271A (en) | 1990-06-27 |
Family
ID=4835178
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 88108726 Pending CN1043271A (en) | 1988-12-17 | 1988-12-17 | The method of preparing spherical catalyst of synthesizing ammonia by using stationary prilling sprayer |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1043271A (en) |
-
1988
- 1988-12-17 CN CN 88108726 patent/CN1043271A/en active Pending
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| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C06 | Publication | ||
| PB01 | Publication | ||
| C01 | Deemed withdrawal of patent application (patent law 1993) | ||
| WD01 | Invention patent application deemed withdrawn after publication |