CN104860737B - The production system and technique of slurrying under a kind of high tower production composite fertilizer tower - Google Patents
The production system and technique of slurrying under a kind of high tower production composite fertilizer tower Download PDFInfo
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Abstract
The present invention produces the production system and technique of slurrying under composite fertilizer's tower for a kind of high tower.The production system includes pulverizer and feed proportioning system, and pulverizer is connected with feed proportioning system, has been sequentially connected in series after described feed proportioning system and has mixed heating tank, slurry circulation heating tank, filter, grinding circulating pump, slurry delivery pump, rotary granulator；Described mixing heating tank is connected with slurry circulation heating tank, and slurry delivery pump is connected with comminutor.Slurrying production technology under high tower production composite fertilizer tower of the present invention；It is formed by critical processes such as ' dispensing, slurrying, circulating-heating, filtering grindings ' and equipment and technology set.So as to ensure that the qualification rate of product reaches more than 90%, improve the security of production, reduce environmental pollution and the health effect to personnel, reduce equipment and construction investment to a greater degree, the features such as facilitating the maintaining of equipment, therefore present invention process technology has considerable economic benefit and social benefit.
Description
Technical field
The invention belongs to high tower production composite fertilizer's slurrying field, the production system of slurrying specially under high tower production composite fertilizer tower
System and technique.
Background technology
High tower method urinates base or nitro-compound fertilizer and preparation method, and this method includes urea or ammonium nitrate, phosphate fertilizer, potash fertilizer and filled out
Material is transported in each feed bin of tower top with lift respectively;First by urea or ammonium nitrate by after the metering of the electronic scale of tower top,
It is put into melting plant and is melted, urine or ammonium nitrate solution is made;By phosphate fertilizer after metering, potash fertilizer, fill out stone be put into it is molten
Mixed groove carries out mixture with urine or ammonium nitrate solution, and slurry is made;After made slurry is sprayed by prilling spry, then high tower is cold
But granulating and by can be prepared by urinating base or nitro-compound fertilizer after screening process.
High tower production compound fertilizer technology method in the prior art, according in domestic Patents documents data, to listed model
The domestic literature enclosed is retrieved, and is now summarized as follows pertinent literature main contents：
A kind of high tower method urine base or nitro-compound fertilizer and preparation method, this method are included urea or ammonium nitrate, phosphate fertilizer, potash fertilizer
It is transported to respectively with lift in each feed bin of tower top with filler；First urea or ammonium nitrate are measured by the electronic scale in tower top
Afterwards, it is put into melting plant and is melted, urine or ammonium nitrate solution is made；By phosphate fertilizer after metering, potash fertilizer, fill out stone and be put into
It is fused and mixed groove and carries out mixture with urine or ammonium nitrate solution, slurry is made.
A kind of process of compound fertilizer production by tower granulation, its slurrying is using the continuous slurrying that progressively cools of three steps series connection
Method, mainly include the following steps that：（1）Cosolvent and urea are added in fusion tank, one-level mixing channel will be flowed into after urea melting；
（2）In one-level mixing channel, the normal temperature raw material not reacted is added in the urea melting liquid of melting, by what is obtained after mixing
Fused materials are flowed into two level mixing channel；（3）In two level mixing channel, normal temperature MAP is added, when being mixed with fused materials
Between be less than 4 minutes, obtain mixed melting slurry；Mixed melting slurry is completed by the prilling spry sprinkling in high tower in tower
It is granulated.
A kind of tower granulation method of compound (mixed) fertilizer, comprises the following steps:Liquid material is delivered to dissolving and buffering
Groove, normal temperature solid material potassium sulfate or potassium chloride mixing are added, according to the ratio of normal temperature solid material and liquid material, by molten
Solution and dashpot, maintain the temperature at certain limit, the mixed dissolution and dashpot of granulation tower tip position are delivered to pump, add
Normal temperature solid material phosphate fertilizer ensures its suitable prilling temperature, makes the suspension by mixing buffer unit control material temperature
Shape material is granulated into comminutor.
A kind of process of high tower fusion method production composite fertilizer, including slurrying, be granulated and step of changing the line of production, its step of changing the line of production
It is rapid to include unloading original formulation clout, new formula dispensing production stage, while the whole density of setting meter pair in slurrying and step of changing the line of production
Fusion tank, one-level mixing channel, the density of the liquation in two level mixing channel or slurry are monitored in real time.
But still there is following technological deficiency in the process of above-mentioned high tower production composite fertilizer of the prior art：It is and high
The production system of slurrying and technique then have no report under tower production composite fertilizer tower.
（1）, phosphate fertilizer, potash fertilizer, other nitrogenous fertilizer, filler then pass through Special-purpose lifting machine in high-tower granulation technology or bucket elevator transports
To high 100 meters or so of granulation column overhead, device capital investment is big, and power consumption is high.
（2）, urea or ammonium nitrate and other materials start in tower top heating and melting, tower top device after metering in solid form
Because the limited maintenance in place is difficult, the investment of tower top foundation of civil work is big.
（3）, high-tower granulation tower top slurrying security it is poor, there is different manufacturers tower top pulp making operations occurred in recent years
Shi Fasheng personnel are poisoned or lethal cases, and mainly tower top space is small, and evacuating personnel is inconvenient.
（4）, tower top slurrying because being limited by place, equipment difficult arrangement slurrying is incomplete, causes product particle quality up to not
It is higher to requirements at the higher level, returning charge rate.
（5）, composite heat transfer poor continuity, most important reason is：Brought into powdery monoammonium phosphate, potassium, other materials
System insoluble impurities results in blockage；Inhomogeneities is produced in solid material and fused solution emulsion process in addition, easily the group of being formed
Shot-like particle blocks shower nozzle.
The content of the invention
The present invention is based on above technical problem, there is provided a kind of safety, the high tower of reduced investment are produced and made under composite fertilizer's tower
The production system and process of slurry, its production efficiency is high, and effects on slurry making is good, continuity is strong, and the product quality produced can
It is effectively ensured.
The technical scheme is that：
The production system of slurrying under a kind of high tower production composite fertilizer tower, including pulverizer and feed proportioning system, pulverizer is with matching somebody with somebody
Material system is connected, and has been sequentially connected in series after described feed proportioning system and has mixed heating tank, slurry circulation heating tank, filtering
Device, grinding circulating pump, slurry delivery pump, rotary granulator；Described mixing heating tank connects with slurry circulation heating tank
Connect.Described slurry delivery pump is connected with comminutor.
Grinding circulating pump is provided between described mixing heating tank and described slurry circulation heating tank.It is described
Slurry circulation heating tank be coil heater；Described filter is Spiralism type on-line cleaning slag dumping filter；Described
Grinding circulating pump is horizontal fine and closely woven tooth-like grinding pump.
The production technology of slurrying under a kind of high tower production composite fertilizer tower, it is multiple that the production technology employs described high tower production
The production system of slurrying under the tower of Hefei, specific production technology comprise the following steps：
（a）Dispensing；By nitrogen, phosphorus, potassium and trace element by crushing, sub-sieve, weigh, measure after enter batch bin；
（b）Slurrying：Enter in the lump with the material that feed proportioning system batch bin comes from the ammonium nitrate solution that dual circulation comes and mix
Agitating and heating groove carries out slurrying；The ammonium nitrate solution come from dual circulation, concentration 99.5-99.8%wt, temperature 175-178
DEG C, into mixing heating tank.
（c）Circulating-heating：Feed proportioning system is added in heating tank come nitrogenous after metering, phosphorus, potassium and micro to mixing
The material of element, slurry circulation heating tank is flowed into from overflow pipe after mixing heating tank and being mixed evenly；Described material
Slurry in slurry circulating-heating groove is sufficiently mixed herein, and 180-185 DEG C is heated to by groove internal coil-tube type heater.
（d）Filtering grinding：After slurry enters slurry circulation heating tank, filtered, grinding, circulation, it is made satisfactory
It is granulated after slurry through being pumped into tower top rotary granulator, finally gives smooth, satisfactory, the uniform product of particle.It is described
Slurry circulation heating tank in slurry through Spiralism type on-line cleaning slag dumping filter filtering after, pass through horizontal fine and closely woven tooth-like grinding
Some is sent to slurry vessel after circulating pump grinding, and being pumped into tower top rotary granulator through slurry pipeline transport herein is granulated；Separately
Slurry circulation heating tank is returned after a part of blended agitating and heating groove.
In this production technology, step（b）Slurrying, using pulping process under tower, pulping process（1）It can mitigate and be granulated on tower top
Load；（2）The height of granulation tower can be reduced.（3）Reduce the investment of solid material high tower lifting device；（4）In terms of security
Greatly improve；（5）Environmentally friendly aspect：Save bucket to carry device and can alleviate a large amount of elegant of solid material dust significantly naturally, therefore
Relative is advantageous to environmental protection.（6）In terms of maintenance：Pulping equipment facilitates the maintenance of equipment, maintains or even hang after moving under tower
Dress is changed.
Step（c）Circulating-heating, slurry are added in circulating slot using 1.6MPa steam by groove internal coil-tube type heater
Heat carries out being sufficiently mixed raising cosolvency herein to 180-185 DEG C；The circulating-heating technique, by circulating-heating and fills
Divide ground to carry out mixing homogeneous to slurry, improve the miscible degree of slurry.
Step（d）Filtering is ground, and because material brings the insoluble impurities of system into slurry, and raw material emulsifies with fused solution
During produce the pellet shape thing of formation, fused, the system that into grinding pump carries out further grinding again after being filtered by filter
Take cosolvency preferably compound slurry.The filtering uses Spiralism type on-line cleaning slag dumping filter, ensures the continuous steady of production
Fixed length periodic duty；The grinding uses horizontal fine and closely woven tooth-like grinding circulating pump, and it is very high can preferably to produce cosolvency
Compound slurry, ensure that the qualification rate of product quality reaches more than 90%, reducing returning charge reduces consumption.
Compared with prior art, beneficial effects of the present invention are：
（One）, slurrying production technology under high tower of the present invention production composite fertilizer tower；It is by ' dispensing, slurrying, circulation
Heating, filtering grinding ' etc. critical process and equipment and technology set form.So as to ensure that the qualification rate of product reaches more than 90%, carry
The security of height production, reduces environmental pollution and the health effect to personnel, reduces equipment to a greater degree and civil engineering is thrown
Money, the features such as facilitating the maintaining of equipment, therefore present invention process technology have considerable economic benefit and society to imitate
Benefit.
（Two）Slurrying production technology under high tower production composite fertilizer tower of the present invention；Using pulping process under tower：（a）Can
Mitigate the load being granulated on tower top（The dynamic and static load of plant equipment and the dead load of container）, machinery and apparatus on tower top
For device in addition to prilling granulator, other main devices have storage bin, electronic belt metering and conveying device, melting plant, mixing
Device etc.；（b）Reduce tower height：Due to the said equipment on granulation tower has been moved under tower, the working lining floor height of tower top can
Reduce at least ten meters.Based on 120,000 yuan current of every meter of cost of 300,000 tons of granulation tower reinforced concrete structures of annual output, it can at least save
1,200,000 yuan of investment-saving.（c）Reduce solid material high tower lifting device：If based on 3 sets of lifting devices of standard configuration（Nitrogen, phosphorus,
Potassium is each a set of）, lifting device is often covered based on 500,000 yuan, can also be reduced investment outlay more than million yuan.Reduce again to belt elevator simultaneously
Maintaining and the cost for changing repairing, what almost all of high tower user was different degrees of at present lives through elevator event
Barrier, the failure make user suffer untold misery.（d）In terms of security：There is different manufacturers tower top slurrying behaviour occurred in recent years
Personnel's poisoning or lethal cases occur when making, mainly tower top space is small, and evacuating personnel is inconvenient.In the granulation tower of hundred meters of height
Once there is the accident of secure context in top, and the life security of the several operators of tower top will be threatened directly, thereafter
Fruit will be hardly imaginable.（e）Environmentally friendly aspect：Often set bucket carries a passage inherently smokestack, and a large amount of of tower top powder material are floatd
Ease can also cause certain in addition to causing suitable physical waste to user to the healthy and local environmental protection of worker
Pressure, save bucket and carry device and can alleviate the stack effect of solid material dust emission significantly naturally, therefore relative be advantageous to
Environmental protection.（f）In terms of maintenance：Pulping equipment facilitates the maintenance, maintenance or even lifting of equipment to change after moving under tower.
（Three）Slurrying production technology under high tower production composite fertilizer tower of the present invention；Filtering grinding is set, using vane
Formula on-line cleaning slag dumping filter, ensure the continuous-stable long-term operation of production；Using horizontal fine and closely woven tooth-like grinding circulating pump,
The very high compound slurry of cosolvency can be preferably produced, ensures that the qualification rate of product quality reaches more than 90%, reduces returning charge
Reduce consumption（The returning charge rate of existing compound fertilizer technology is in 25-30%）.
Brief description of the drawings：
Fig. 1 is the schematic diagram of slurrying production system under high tower production composite fertilizer tower of the present invention.
Embodiment
In order that present disclosure easily facilitates understanding, below in conjunction with the drawings and specific embodiments in the present invention
Described energy-saving complete circling urea production system and its technique is further elaborated.But this should not be interpreted as in the present invention
The scope for stating theme is only limitted to following embodiments.
Embodiment 1：
Slurrying production system is as shown in figure 1, the system includes under high tower production composite fertilizer tower：Pulverizer, feed proportioning system,
Be sequentially connected in series after described feed proportioning system mix heating tank, slurry circulation heating tank, filter, grinding circulating pump,
Slurry delivery pump, rotary granulator；Described mixing heating tank is connected with slurry circulation heating tank；Described slurry is defeated
Pump is sent to be connected with comminutor；Grinding is provided between described mixing heating tank and described slurry circulation heating tank to follow
Ring pump.The filtering of Spiralism type on-line cleaning slag dumping is provided between described slurry circulation heating tank and described grinding circulating pump
Device.
Production technology based on slurrying production system under the high tower production composite fertilizer tower described in the present embodiment is：
（a）Dispensing；By nitrogen, phosphorus, potassium and it is other trace element by crushing, sub-sieve, weigh, measure after enter batch bin；
（b）Slurrying：From dual circulation come concentration 99.5-99.8%wt, about 175-178 DEG C ammonium nitrate solution of temperature, with
The material that material system batch bin comes enters in the lump mixes heating tank progress slurrying；
（c）Circulating-heating：Feed proportioning system is added in heating tank come nitrogenous after metering, phosphorus, potassium and other to mixing
The material of trace element, slurry circulation heating tank, slurry are flowed into from overflow pipe after mixing heating tank and being mixed evenly
180-185 DEG C is heated to by groove internal coil-tube type heater using 1.6MPa steam in circulating slot, and is carried out herein abundant
Mixing improves cosolvency；
（d）Filtering grinding：Slurry in slurry circulation heating tank leads to after the filtering of Spiralism type on-line cleaning slag dumping filter
Some is sent to slurry vessel after crossing horizontal fine and closely woven tooth-like grinding circulating pump grinding, and it is rotary to be pumped into tower top through slurry pipeline transport herein
Comminutor is granulated；Slurry circulation heating tank is returned after another blended agitating and heating groove of part；Filtered, grinding, circulation,
It is granulated after satisfactory slurry is made through being pumped into tower top rotary granulator, it is smooth, satisfactory, equal finally gives particle
Even product.
Although the present invention is elaborated by embodiment to it, this professional ordinary skill
Personnel should be understood that the change for any form and details without departing from claims made on this basis,
Belong to invention which is intended to be protected.
Claims (2)
1. the production system of slurrying under a kind of high tower production composite fertilizer tower, including pulverizer and feed proportioning system, it is characterised in that：Powder
Broken machine is connected with feed proportioning system, has been sequentially connected in series after described feed proportioning system and has mixed heating tank, slurry circulation heating
Groove, filter, grinding circulating pump, slurry delivery pump, rotary granulator；Described mixing heating tank adds with slurry circulation
Heat channel connects；Described slurry delivery pump is connected with comminutor；Heating tank and described slurry circulation are mixed in described
Grinding circulating pump is provided between heating tank；Described slurry circulation heating tank is coil heater；Described filter is
Spiralism type on-line cleaning slag dumping filter；Described grinding circulating pump is horizontal fine and closely woven tooth-like grinding pump.
2. the production technology of slurrying under a kind of high tower production composite fertilizer tower, it is characterised in that the production technology employs right such as will
The high tower described in 1 is asked to produce the production system of slurrying under composite fertilizer's tower, specific production technology comprises the following steps：
（a）Dispensing；By nitrogen, phosphorus, potassium and trace element by crushing, sub-sieve, weigh, measure after enter batch bin；
（b）Slurrying：The concentration 99.5-99.8%wt come from dual circulation, temperature is 175-178 DEG C of ammonium nitrate solution, with dispensing system
The material that feed bin under unified central planning comes enters in the lump mixes heating tank progress slurrying；
（c）Circulating-heating：Come nitrogenous after metering, phosphorus, potassium and trace element to addition feed proportioning system in heating tank is mixed
Material, mix heating tank be mixed evenly after from overflow pipe flow into slurry circulation heating tank, slurry is in circulating slot
The interior steam using 1.6MPa is heated to 180-185 DEG C by disc type heater in groove, and carries out being sufficiently mixed raising herein altogether
Dissolubility；
（d）Filtering grinding：Slurry in slurry circulation heating tank is after the filtering of Spiralism type on-line cleaning slag dumping filter, by sleeping
Some is sent to slurry vessel after the fine and closely woven tooth-like grinding circulating pump grinding of formula, and being pumped into tower top through slurry pipeline transport herein is rotatably granulated
Machine is granulated；Slurry circulation heating tank is returned after another blended agitating and heating groove of part；Filtered, grinding, circulation, are made
It is granulated after satisfactory slurry through being pumped into tower top rotary granulator, it is smooth, satisfactory, uniform finally gives particle
Product.
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| Publication number | Priority date | Publication date | Assignee | Title |
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| 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 |
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 |
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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 |
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