CN104860737A - Tower pulping production system and process for tower production compound fertilizers - Google Patents
Tower pulping production system and process for tower production compound fertilizers Download PDFInfo
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- CN104860737A CN104860737A CN201510313884.0A CN201510313884A CN104860737A CN 104860737 A CN104860737 A CN 104860737A CN 201510313884 A CN201510313884 A CN 201510313884A CN 104860737 A CN104860737 A CN 104860737A
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Abstract
The invention discloses a tower pulping production system and process for tower production compound fertilizers. The production system comprises a grinder and a batching system, wherein the grinder is connected with the batching system; a mixing and stirring heating tank, a slurry circulation heating tank, a filter, a grinding circulating pump, a slurry delivery pump and a rotary granulator are sequentially connected in series behind the batching system; the mixing and stirring heating tank is connected with the slurry circulation heating tank; and the slurry delivery pump is connected with the granulator. The invention discloses a tower pulping production process for tower production compound fertilizers. The process is formed by integrating key technologies such as batching, pulping, circulation heating, filtering and grinding and equipment technologies. Therefore, the yield of the product is over 90 percent, the productions safety is improved, the environmental pollution and influence on health of personnel are reduced, the equipment and civil engineering investment is greatly reduced, and the equipment is convenient to maintain. Therefore, the technology has considerable economic benefits and social benefits.
Description
Technical field
The invention belongs to high tower production composite fertilizer's slurrying field, be specially production system and the technique of slurrying under high tower production composite fertilizer tower.
Background technology
High tower method urine base or nitro-compound fertilizer and preparation method, the method comprises and is transported in each feed bin of tower top with elevator respectively by urea or ammonium nitrate, phosphate fertilizer, potash fertilizer and filler; First urea or ammonium nitrate are passed through after the electronic scales metering of tower top, put into melting plant and melt, make urine or ammonium nitrate solution; By phosphate fertilizer after metering, potash fertilizer, fill out stone and put into molten mixed groove and urine or ammonium nitrate solution and carry out mixture, make slip; After made slip is sprayed by prilling spry, then high tower cooled granulating and urinate base or nitro-compound fertilizer by obtaining after screening process.
High tower is produced in compound fertilizer technology method prior art, according in domestic Patents documents and materials, retrieves the domestic literature of listed scope, now pertinent literature main contents is summarized as follows:
A kind of high tower method urine base or nitro-compound fertilizer and preparation method, the method comprises and is transported in each feed bin of tower top with elevator respectively by urea or ammonium nitrate, phosphate fertilizer, potash fertilizer and filler; First urea or ammonium nitrate are passed through after the electronic scales metering of tower top, put into melting plant and melt, make urine or ammonium nitrate solution; By phosphate fertilizer after metering, potash fertilizer, fill out stone and put into molten mixed groove and urine or ammonium nitrate solution and carry out mixture, make slip.
A processing method for compound fertilizer production by tower granulation, its slurrying adopts the continuous pulping method of progressively lowering the temperature of three step series connection, mainly comprises the following steps: (1) adds solubility promoter and urea in fusion tank, will flow into one-level tempering tank after urea melting; (2) in one-level tempering tank, add in the urea melting liquid of melting not with the normal temperature raw material of its reaction, the molten materials obtained after mixing is flowed in secondary tempering tank; (3) in secondary tempering tank, add normal temperature monoammonium phosphate, be less than 4 minutes with molten materials mixing time, obtain mixed melting slip; The prilling spry of mixed melting slip in high tower sprays, in tower, complete granulation.
The tower granulation method that a kind of compound (mixing) is fertile; liquid material is comprised the steps: to be delivered to dissolving and dashpot; add normal temperature solid materials potassium sulfate or Repone K mixing; according to the ratio of normal temperature solid materials and liquid material; by dissolving and dashpot; maintain the temperature at certain limit; by pump delivery to the mixed dissolution of prilling tower tip position and dashpot; add normal temperature solid materials phosphate fertilizer and control temperature of charge by mixing snubber assembly; ensure its suitable prilling temperature, make this suspension material enter tablets press and carry out granulation.
A kind of processing method of high tower scorification production composite fertilizer, comprise slurrying, granulation and step of changing the line of production, its step of changing the line of production comprises unloads original formulation clout, new formula batching production stage, and in slurrying and step of changing the line of production, the density of omnidistance density of setting meter to the liquation in fusion tank, one-level tempering tank, secondary tempering tank or slip carries out Real-Time Monitoring simultaneously.
But still there is following technological deficiency in the processing method of above-mentioned high tower production composite fertilizer of the prior art: production system and the technique of slurrying under high tower production composite fertilizer tower then have no report.
(1), phosphate fertilizer in high tower prilling technology, potash fertilizer, other nitrogenous fertilizer, filler be then transported to the prilling tower tower top of high about 100 meters by Special-purpose lifting machine or bucket elevator, and device capital investment is large, and power consumption is high.
(2), urea or ammonium nitrate and other material start in solid form after metering in tower top heating and melting, tower top device because of the limited maintenance in place difficulty, the investment of tower top foundation of civil work large.
(3), high tower prilling tower top slurrying poor stability, personnel's poisoning or lethal cases occurs when having different manufacturers to occur tower top pulp making operations in recent years, and mainly tower top space is little, and evacuating personnel is inconvenient.
(4), tower top slurrying because limiting by place, the slurrying of equipment layout difficulty is incomplete, and cause product particle quality not reach requirements at the higher level, returning charge rate is higher.
(5), composite heat transfer poor continuity, topmost reason is: bring system insoluble impurities into result in blockage with powdery monoammonium phosphate, potassium, other material; Ununiformity is produced in addition, easily the group's of being formed saccharoid blocking shower nozzle in solid material and fused solution emulsion process.
Summary of the invention
The present invention is just based on above technical problem, production system and the processing method of slurrying under the high tower production composite fertilizer tower of a kind of safety, reduced investment are provided, its production efficiency is high, and effects on slurry making is good, continuity is strong, and the quality product produced can effectively be ensured.
Technical scheme of the present invention is:
The production system of slurrying under a kind of high tower production composite fertilizer tower, comprise pulverizer and feed proportioning system, pulverizer is connected with feed proportioning system, is in series with mix and blend heating tank, slurry circulation heating tank, strainer, grinding recycle pump, slurry delivery pump, rotary granulator after described feed proportioning system successively; Described mix and blend heating tank is connected with slurry circulation heating tank.Described slurry delivery pump is connected with tablets press.
Grinding recycle pump is provided with between described mix and blend heating tank and described slurry circulation heating tank.Described slurry circulation heating tank is coil heater; Described strainer is Spiralism type on-line cleaning slag dumping strainer; Described grinding recycle pump is horizontal fine and closely woven tooth-like grinding pump.
A production technique for slurrying under high tower production composite fertilizer tower, this production technique have employed the production system of slurrying under described high tower production composite fertilizer tower, and concrete production technique comprises the steps:
A () is prepared burden; By nitrogen, phosphorus, potassium and trace element by pulverizing, sub-sieve, weigh, measure after enter batch bin;
(b) slurrying: the material that the ammonium nitrate solution come from dual circulation and feed proportioning system batch bin come enters mix and blend heating tank in the lump and carries out slurrying; From the ammonium nitrate solution that dual circulation comes, concentration is 99.5-99.8%wt, and temperature is 175-178 DEG C, enters mix and blend heating tank.
(c) circulating-heating: add the material that feed proportioning system comes nitrogenous, phosphorus, potassium and trace element after metering in mix and blend heating tank, flow into slurry circulation heating tank from upflow tube after mix and blend heating tank mixing and stirring; Slip in described slurry circulation heating tank fully mixes at this, by groove internal coil-tube type heater heats to 180-185 DEG C.
(d) filter grinding: after slip enters slurry circulation heating tank, after filtration, grinding, circulation, carrying out granulation through being pumped into tower top rotary granulator after making satisfactory slip, finally obtaining smooth, satisfactory, the uniform product of particle.Slip in described slurry circulation heating tank, after Spiralism type on-line cleaning slag dumping metre filter, is sent to slurry vessel by some after horizontal fine and closely woven tooth-like grinding recycle pump grinding, is pumped into tower top rotary granulator carries out granulation at this through slurry pipeline transport; Another part returns slip circulating-heating groove after mix and blend heating tank.
In this production technique, step (b) slurrying, pulping process under employing tower, pulping process (1) can alleviate the load on granulation tower top; (2) height of prilling tower can be reduced.(3) investment of solid materials high tower lifting gear is decreased; (4) security aspect improves greatly; (5) environmental protection aspect: saving bucket and carrying device and naturally greatly can alleviate the elegant in a large number of solid materials dust, is conducive to environmental protection therefore relatively.(6) maintenance aspect: pulping equipment move to facilitate equipment after under tower maintenance, maintenance so lifting change.
Step (c) circulating-heating, slip utilizes the steam of 1.6MPa by groove internal coil-tube type heater heats to 180-185 DEG C in circulation groove, and carries out fully mixing raising cosolvency at this; Described circulating-heating technique, also carries out mixing homogeneous to slip fully by circulating-heating, improves the miscible degree of slip.
Step (d) filters grinding, because the insoluble impurities of system brought into by material in slip, and in raw material and fused solution emulsion process, produce group's saccharoid of formation, by entering grinding pump after metre filter, to carry out further grinding more fused, produces the better compound slip of cosolvency.Described filtration adopts Spiralism type on-line cleaning slag dumping strainer, ensures the continous-stable long-term operation produced; Described grinding adopts horizontal fine and closely woven tooth-like grinding recycle pump, can produce the compound slip that cosolvency is very high better, ensures that the qualification rate of quality product reaches more than 90%, reduces returning charge and reduces consumption.
Compared with prior art, beneficial effect of the present invention is:
(1), slurrying production technique under high tower production composite fertilizer of the present invention tower; It is formed by critical processes such as ' batching, slurrying, circulating-heating, filtration are ground ' and equipment and technology set.Thus ensure that the qualification rate of product reaches more than 90%, improve the security of producing, decrease environmental pollution and the healthy effect to personnel, decrease equipment and construction investment to a greater degree, facilitate the features such as the maintaining of equipment, therefore present invention process technology has appreciable economic benefit and social benefit.
(2) slurrying production technique under high tower production composite fertilizer of the present invention tower; Pulping process under employing tower: (a) can alleviate the load (the dynamic and static load of mechanical means and the static load of container) on granulation tower top, machinery on tower top and apparatus are except prilling granulator, and other main devices have storage bin, electronic belt to measure and e Foerderanlage, melting plant, mixing device etc.; B () reduces tower height: under the aforesaid device on prilling tower has been moved to tower, and the working lining floor height of tower top can reduce at least ten meters.By current annual output 300000 tons of prilling tower skeleton constructions every meter of cost 120,000 yuan, at least can reduce investment outlay 1,200,000 yuan.C () decreases solid materials high tower lifting gear: if overlap lifting gear (nitrogen, phosphorus, potassium are each a set of) by standard configuration 3, often overlaps lifting gear by 500,000 yuan, also can reduce investment outlay more than 1,000,000 yuan.Reduce again belt elevator maintaining and the cost changing repairing simultaneously, high tower user nearly all at present all in various degree live through lift fault, this fault makes user suffer untold misery.(d) security aspect: personnel's poisoning or lethal cases occurs when having different manufacturers to occur tower top pulp making operations in recent years, and mainly tower top space is little, and evacuating personnel is inconvenient.At the prilling tower top of hundred meters of height once there is the accident of secure context, the life security of the several operator of tower top will be subject to direct threat, and its consequence is by hardly imaginable.(e) environmental protection aspect: often overlap bucket and carry a passage inherently smokestack; the elegant in a large number of tower top powder material causes certain pressure also can to except causing suitable material wastage to user the health of workman and the environment protection of locality; saving bucket and carrying the chimneyeffect that device can alleviate solid materials dust discharge naturally greatly, being therefore relatively conducive to environmental protection.(f) maintenance aspect: pulping equipment move to facilitate equipment after under tower maintenance, maintenance so lifting change.
(3) slurrying production technique under high tower production composite fertilizer of the present invention tower; Arrange and filter grinding, adopt Spiralism type on-line cleaning slag dumping strainer, ensure the continous-stable long-term operation produced; Adopt horizontal fine and closely woven tooth-like grinding recycle pump, the compound slip that cosolvency is very high can be produced better, ensure that the qualification rate of quality product reaches more than 90%, reduce returning charge and reduce consumption (the returning charge rate of existing composite fertilizer technology is at 25-30%).
Accompanying drawing illustrates:
Fig. 1 is the schematic diagram of slurrying production system under high tower production composite fertilizer of the present invention tower.
Embodiment
More being convenient to make content of the present invention understand, below in conjunction with the drawings and specific embodiments, the energy-saving complete circling urea production system described in the present invention and technique thereof being further elaborated.But this should be interpreted as that the scope of the above-mentioned theme of the present invention is only limitted to following embodiment.
Embodiment 1:
Under high tower production composite fertilizer tower, slurrying production system as shown in Figure 1, described system comprises: pulverizer, feed proportioning system, is in series with mix and blend heating tank, slurry circulation heating tank, strainer, grinding recycle pump, slurry delivery pump, rotary granulator after described feed proportioning system successively; Described mix and blend heating tank is connected with slurry circulation heating tank; Described slurry delivery pump is connected with tablets press; Grinding recycle pump is provided with between described mix and blend heating tank and described slurry circulation heating tank.Spiralism type on-line cleaning slag dumping strainer is provided with between described slurry circulation heating tank and described grinding recycle pump.
Based on the production technique of slurrying production system under the high tower production composite fertilizer tower described in the present embodiment be:
A () is prepared burden; By nitrogen, phosphorus, potassium and other trace element by pulverizing, sub-sieve, weigh, measure after enter batch bin;
(b) slurrying: the concentration 99.5-99.8%wt come from dual circulation, temperature is about 175-178 DEG C of ammonium nitrate solution, and the material come with feed proportioning system batch bin enters mix and blend heating tank in the lump and carries out slurrying;
(c) circulating-heating: add the material that feed proportioning system comes nitrogenous, phosphorus, potassium and other trace element after metering in mix and blend heating tank, slurry circulation heating tank is flowed into from upflow tube after mix and blend heating tank mixing and stirring, slip utilizes the steam of 1.6MPa by groove internal coil-tube type heater heats to 180-185 DEG C in circulation groove, and carries out fully mixing raising cosolvency at this;
D () filters grinding: the slip in slurry circulation heating tank is after Spiralism type on-line cleaning slag dumping metre filter, be sent to slurry vessel by some after horizontal fine and closely woven tooth-like grinding recycle pump grinding, be pumped into tower top rotary granulator at this through slurry pipeline transport and carry out granulation; Another part returns slip circulating-heating groove after mix and blend heating tank; After filtration, grinding, circulation, carrying out granulation through being pumped into tower top rotary granulator after making satisfactory slip, finally obtaining smooth, satisfactory, the uniform product of particle.
Although the present invention is elaborated it by embodiment; but; those skilled in the art should be understood that and made on this basis not exceed any form of claims and the change of details, all belong to invention which is intended to be protected.
Claims (8)
1. the production system of slurrying under a high tower production composite fertilizer tower, comprise pulverizer and feed proportioning system, it is characterized in that: pulverizer is connected with feed proportioning system, after described feed proportioning system, be in series with mix and blend heating tank, slurry circulation heating tank, strainer, grinding recycle pump, slurry delivery pump, rotary granulator successively; Described mix and blend heating tank is connected with slurry circulation heating tank.
2. the production system of slurrying under high tower production composite fertilizer according to claim 1 tower, is characterized in that: described slurry delivery pump is connected with tablets press.
3. the production system of slurrying under high tower production composite fertilizer according to claim 1 tower, is characterized in that: between described mix and blend heating tank and described slurry circulation heating tank, be provided with grinding recycle pump.
4. the production system of slurrying under high tower production composite fertilizer according to claim 1 tower, is characterized in that: described slurry circulation heating tank is coil heater; Described strainer is Spiralism type on-line cleaning slag dumping strainer; Described grinding recycle pump is horizontal fine and closely woven tooth-like grinding pump.
5. the production technique of slurrying under a high tower production composite fertilizer tower, it is characterized in that this production technique have employed the production system as slurrying under the high tower production composite fertilizer tower in claim 1-4 as described in any one claim, concrete production technique comprises the steps:
A () is prepared burden; By nitrogen, phosphorus, potassium and trace element by pulverizing, sub-sieve, weigh, measure after enter batch bin;
(b) slurrying: the material that the ammonium nitrate solution come from dual circulation and feed proportioning system batch bin come enters mix and blend heating tank in the lump and carries out slurrying;
(c) circulating-heating: add the material that feed proportioning system comes nitrogenous, phosphorus, potassium and trace element after metering in mix and blend heating tank, flow into slurry circulation heating tank from upflow tube after mix and blend heating tank mixing and stirring;
(d) filter grinding: after slip enters slurry circulation heating tank, after filtration, grinding, circulation, carrying out granulation through being pumped into tower top rotary granulator after making satisfactory slip, finally obtaining smooth, satisfactory, the uniform product of particle.
6. the production technique of slurrying under high tower production composite fertilizer according to claim 5 tower, it is characterized in that: in described step (b), from the ammonium nitrate solution that described dual circulation comes, concentration 99.5-99.8%wt, temperature is about 175-178 DEG C, enters mix and blend heating tank.
7. the production technique of slurrying under high tower production composite fertilizer according to claim 5 tower, it is characterized in that: in described step (c), slip in described slurry circulation heating tank fully mixes at this, by groove internal coil-tube type heater heats to 180-185 DEG C.
8. the production technique of slurrying under high tower production composite fertilizer according to claim 5 tower, it is characterized in that: in described step (d), slip in described slurry circulation heating tank is after Spiralism type on-line cleaning slag dumping metre filter, be sent to slurry vessel by some after horizontal fine and closely woven tooth-like grinding recycle pump grinding, be pumped into tower top rotary granulator at this through slurry pipeline transport and carry out granulation; Another part returns slip circulating-heating groove after mix and blend heating tank.
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110156542A (en) * | 2019-04-30 | 2019-08-23 | 宜昌阿波罗肥业有限公司 | Compound fertilizer granulating processing unit (plant) and granulation processing method |
| CN113880671A (en) * | 2021-10-21 | 2022-01-04 | 世纪云天(黑龙江)化学有限公司 | Granulation method of high-tower melt high-phosphorus compound fertilizer |
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| CN1475470A (en) * | 2003-06-23 | 2004-02-18 | 深圳市芭田生态工程股份有限公司 | Method of producing granular composite fertilizer using high tower pellatizer and equipment |
| CN1546441A (en) * | 2003-12-16 | 2004-11-17 | 高建华 | Melt slurry tower type composite granulating fertilizer and its making process |
| CN102863281A (en) * | 2012-08-27 | 2013-01-09 | 徐州市芭田生态有限公司 | Method for producing high-tower nitro-sulfenyl compound fertilizer and production system applying method |
| CN103193533A (en) * | 2013-03-27 | 2013-07-10 | 徐州市芭田生态有限公司 | Method for improving and stabilizing high tower nitro sulfenyl composite fertilizer product |
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- 2015-06-10 CN CN201510313884.0A patent/CN104860737B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1475470A (en) * | 2003-06-23 | 2004-02-18 | 深圳市芭田生态工程股份有限公司 | Method of producing granular composite fertilizer using high tower pellatizer and equipment |
| CN1546441A (en) * | 2003-12-16 | 2004-11-17 | 高建华 | Melt slurry tower type composite granulating fertilizer and its making process |
| CN102863281A (en) * | 2012-08-27 | 2013-01-09 | 徐州市芭田生态有限公司 | Method for producing high-tower nitro-sulfenyl compound fertilizer and production system applying method |
| CN103193533A (en) * | 2013-03-27 | 2013-07-10 | 徐州市芭田生态有限公司 | Method for improving and stabilizing high tower nitro sulfenyl composite fertilizer product |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110156542A (en) * | 2019-04-30 | 2019-08-23 | 宜昌阿波罗肥业有限公司 | Compound fertilizer granulating processing unit (plant) and granulation processing method |
| CN113880671A (en) * | 2021-10-21 | 2022-01-04 | 世纪云天(黑龙江)化学有限公司 | Granulation method of high-tower melt high-phosphorus compound fertilizer |
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