CN109179354A - A kind of ammonium phosphate of slurry concentration process neutralization reaction system - Google Patents
A kind of ammonium phosphate of slurry concentration process neutralization reaction system Download PDFInfo
- Publication number
- CN109179354A CN109179354A CN201811403565.9A CN201811403565A CN109179354A CN 109179354 A CN109179354 A CN 109179354A CN 201811403565 A CN201811403565 A CN 201811403565A CN 109179354 A CN109179354 A CN 109179354A
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- Prior art keywords
- filtering
- cylinder
- outer cylinder
- sealing
- slag
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- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01B—NON-METALLIC ELEMENTS; COMPOUNDS THEREOF; METALLOIDS OR COMPOUNDS THEREOF NOT COVERED BY SUBCLASS C01C
- C01B25/00—Phosphorus; Compounds thereof
- C01B25/16—Oxyacids of phosphorus; Salts thereof
- C01B25/26—Phosphates
- C01B25/28—Ammonium phosphates
-
- C—CHEMISTRY; METALLURGY
- C05—FERTILISERS; MANUFACTURE THEREOF
- C05B—PHOSPHATIC FERTILISERS
- C05B7/00—Fertilisers based essentially on alkali or ammonium orthophosphates
Abstract
The invention discloses ammonium phosphate of slurry concentration process neutralization reaction systems, including neutralization chamber neutralization chamber, sealing blocking apparatus, an effect flash chamber and two effect flash chambers；Sealing blocking apparatus includes that the upper end of filtering outer cylinder is provided with sealing flange, its bottom surface is provided with slag-drip opening, slag-discharging valve is connected on slag-drip opening, it is cased with filtering inner cylinder in filtering outer cylinder, filters bottom end and the slag-drip opening connection of inner cylinder, top is contacted with sealing flange, it filters and liquid drain hole is distributed on the side wall of inner cylinder, the top of filtering outer cylinder is provided with feed pipe, and feed pipe reaches in filtering inner cylinder top, and the lower end for filtering outer cylinder is provided with discharge nozzle；Scraping wings is additionally provided in filtering inner cylinder, the upside of scraping wings connects push rod, and push rod reaches outside filtering inner cylinder from the centre bore of sealing flange；Sealing device is provided on the centre bore of sealing flange, the gland that push rod passes through sealing device top is connected with the piston rod for the cylinder being located above filtering outer cylinder.The influence to operating environment is reduced, working efficiency is improved.
Description
Technical field
The present invention relates to a kind of ammonium phosphate of slurry concentration process neutralization reaction systems, belong to chemical fertilizer production process technical field.
Background technique
Ammonium phosphate of slurry concentration process is concentrated with the slurry after ammonia neutralization reaction using phosphoric acid by wet process, be specific in low product
A kind of novel process of position phosphorus ore exploitation.Its process is with containing P2O5About 18%~30% phosphoric acid,diluted is reacted with ammonia, passes through control
The monoammonium phosphate slurry that degree of neutralization must need, slurry are concentrated by multiple-effect (generally economic benefits and social benefits), and the slurry after concentration is through being overpressurized
After equipment pressure atomization is dry, monoammonium phosphate product is obtained.Since the requirement to phosphoric acid is less strict, it is possible to use wet process
The phosphoric acid,diluted of production, the filter-press residues of fine phosphate, the concentrated phosphoric acid sludge in features of DAP production also allow to add ore pulp and adjust
Nutrient.Acid source is complicated, and the impurity in phosphoric acid is more, when with ammonia neutralization reaction, can be adhered on solid particle with solid separation；
And some impurity can also cause phosphoric acid to increase, and make reactor wall fouling, and dirty layer falls off in violent reaction, these are solid
Body sundries can cause obstacle to subsequent concentration systems, block heater tubulation, influence that heat transfer property is concentrated, and make that efficiency is concentrated
It reduces, it is such as not parking that tubulation is dredged in time, greatly improve steam energy consumption.
Neutralization reaction is a strong exothermal reaction, when phosphoric acid is reacted with ammonia, can evaporate large quantity of moisture, generates a large amount of steam
Vapour, according to theoretical calculation, every 1000kg phosphoric acid by wet process, reaction heat 3.368*105kj, evaporated water 15%, after every 1kg gas ammonia reaction
Water 1.0-1.3kg can about be evaporated.
As Liquid level is bad or the reasons such as liquidometer failure in neutralization reaction, liquid level is low can make ammonia and reaction vapor from
The evolution of liquid phase layer, causes biggish ammonia to lose, and liquid level operation is excessively high, causes tail gas band foam to run material, pollutes condensed water.
In traditional ammonium phosphate of slurry concentration process and there are many techniques, but there are some problems:
1) in slot type and technique: reactive tank opens wide, and pollutes environment, and heat source does not utilize, and long flow path has stirring, delivery pump
It is high etc. the energy consumption of dynamic equipment.
2) in tubular type and technique: requiring phosphoric acid high, the acid more than impurity causes fouling blockage spray head, makes to produce cleaning work
Amount is big.
3) external circulation ammoniation technique: the reaction time is short, and impurity easily causes follow-up equipment fouling；There is the dynamic equipment such as circulating pump；
Solid sundries intercept difficulty, solid sundries can be brought into subsequent processing, heater tubulation is caused to block.
4) integral process of PA ammoniation & slurry concentration technique: neutralization reaction heat increases cooling water inflow, not energy-efficient；Solid sundries intercept tired
It is difficult；Degree of supersaturation is completely eliminated in flash chamber without enough time when impurity salts out and enters heating tube, can aggravate heater
Tubulation blocking, shortens the cleaning cycle of concentration systems.
5) in forced circulation and technique: land occupation is big, there is equipment circulating pump；Solid sundries intercept difficult.
Secondly:
MAP by Ammoniated Slurry Concentrating Process is to be concentrated using phosphoric acid by wet process with the slurry after ammonia neutralization reaction, after neutralization reaction
Solid sundries in slurry can cause obstacle to subsequent concentration systems, block heater tubulation, influence that heat transfer property is concentrated,
Make that efficiency reduction is concentrated, it is such as not parking that tubulation is dredged, greatly improve steam energy consumption.Therefore must by neutralize slip into
Enter to carry out before subsequent enrichment process the interception of solid sundries.
Traditional slot type neutralization reactor, the interception of solid sundries is carried out using open filter screen, and cleaning slag holds very much
Easily, but since neutralization reaction is strong exothermal reaction, boiling hot hot material slurry quantity of steam is very big, will cause the pollution and steaming of ambient enviroment
The visual pollution of vapour, therefore closed filter device with pressure has been changed in technique, deslagging is carried out using regular parking manmade pressure relief,
The interruption of production is not only caused, but also labor intensity is high, operated very troublesome.
Summary of the invention
In view of the above technical problems, the present invention is intended to provide a kind of ammonium phosphate of slurry concentration process neutralization reaction system.
To achieve the goals above, the technical solution of the present invention is as follows: a kind of ammonium phosphate of slurry concentration process neutralization reaction system, including in
With slot neutralization chamber, sealing blocking apparatus, an effect flash chamber and two effect flash chambers；
The neutralization chamber is sealing neutralization chamber, and top is provided with the first jet chimney, and lower end is provided with slurry outlet,
The slurry outlet is connected by the first slurry pipeline with the feed pipe for sealing blocking apparatus, is arranged on the first slurry pipeline
There is the first control valve；
It is described one effect flash chamber include be cascaded and formed closed loop one effect flash tank, one effect heater and one effect follow
Ring pump, the two effects flash chamber include the two effect flash tanks, two effect heaters and two effect circulations for being cascaded and being formed closed loop
The upper gaseous phase import of pump, the effect flash tank is connected with first jet chimney on neutralization chamber top；The sealing intercepts dress
The discharge nozzle set is connected by the second slurry pipeline with the fluid inlet of two effect flash tank middle and lower parts, under the two effects flash tank
Portion is additionally provided with liquid-phase outlet and is connected with an effect circulating pump, and the second control valve is provided on the second slurry pipeline, special
Sign is: being provided with fluid level transmitter in the neutralization chamber.
The sealing blocking apparatus includes filtering outer cylinder, and the upper end of the filtering outer cylinder is provided with sealing flange, is gone to the bottom
Face is provided with slag-drip opening, and slag-discharging valve is connected on the slag-drip opening, is cased with filtering inner cylinder in the filtering outer cylinder, in the filtering
Have a gap between the barrel of cylinder and the barrel for filtering outer cylinder, the bottom end of the filtering inner cylinder and slag-drip opening connection, top with it is close
Flange contact is sealed, liquid drain hole is distributed on the side wall of the filtering inner cylinder, the top of the filtering outer cylinder is provided with feed pipe, institute
It states feed pipe to reach in filtering inner cylinder top, the lower end of the filtering outer cylinder is provided with discharge nozzle；It is also set in the filtering inner cylinder
It is equipped with scraping wings, the upside of the scraping wings connects push rod, and the push rod reaches outside filtering inner cylinder from the centre bore of sealing flange；
Sealing device is provided on the centre bore of the sealing flange, the sealing device includes that sealing flange is arranged in
Sealed outer cylinder on centre bore aperture, the sealed outer cylinder is interior to be filled with airtight and watertight padding, and the push rod passes through sealed outer cylinder top
Gland be connected with the piston rod of cylinder being located above filtering outer cylinder；
It is provided with differential pressure transmitter between the feed pipe and discharge nozzle of the sealing blocking apparatus, the differential pressure transmitter
Positive side pressure detecting probe is installed on the first slurry pipeline, and negative side pressure detecting probe is installed on the second slurry pipeline.
Using the above scheme, material enters in filtering inner cylinder from feed pipe, and liquid is drained in filtering outer cylinder by liquid drain hole,
It is discharged again from discharge nozzle, solid sundries then stay in inner cylinder.Slag-discharging valve is periodically opened, under the action of scraping wings, by inner cylinder
Interior slag charge is discharged from slag-drip opening, and easy to operate, labor intensity of workers is low.Sealing device is set, and can leak shadow to avoid steam
Ring ambient enviroment.The stopping state that sealing blocking apparatus is detected by differential pressure transmitter decides whether to start scarfing cinder.Pass through liquid level
The level condition of transmitters sense neutralization chamber, so that the aperture of the first control valve of control, keeps the level stability in neutralization chamber.
In above scheme: the sealing flange top surface is equipped with Cylinder mount bracket, and the cylinder is mounted on cylinder installation
On bracket.Facilitate installation.
In above scheme: the gland is bolted on sealing flange top surface.
In above scheme: being provided with gasket seal between the sealing flange and the top for filtering outer cylinder.It avoids outside steam
It lets out.
In above scheme: the feed pipe and draining discharge nozzle are located at the opposite side for filtering outer cylinder.
In above scheme: the slag-discharging valve is gas control ball valve.
In above scheme: the signal output end of the differential pressure transmitter and fluid level transmitter pressure with display controller respectively
Difference signal input terminal is connected with liquid level signal input terminal, each control terminal of the display controller respectively with the first control valve
Door, the second control valve, cylinder are connected with slag-discharging valve.
The utility model has the advantages that the present invention uses closed retaining device, the slurry after neutralization reaction is all intercepted by sealing
Device mitigates the blocking of enrichment process heater tubulation.The excretion of slag object is carried out by cylinder operation, the time is short, without causing
The interruption of production technology is stopped, and labor intensity of workers is low, stable operation, and scarfing cinder is easy.This system neutralization reaction is abundant, vibration
Small, ammonia escaped quantity is few.One effect flash chamber of neutralization chamber tail gas access, such abnormal operation run material and can collect very well, will not pollute steaming
Vapour condensed water, and thermogenetic steam will be reacted and be recycled, energy-saving effect is significant；Unpowered equipment, does not cause energy consumption
Increase.
Detailed description of the invention
Fig. 1 is process flow chart of the invention.
Fig. 2 is the structural schematic diagram of present invention sealing blocking apparatus.
Specific embodiment
By way of example and in conjunction with the accompanying drawings, the invention will be further described:
Embodiment 1, as shown in Figure 1, a kind of ammonium phosphate of slurry concentration process neutralization reaction system, including neutralization chamber 1, sealing blocking apparatus
2, an effect flash chamber and two effect flash chambers.
Neutralization chamber 1 is sealing neutralization chamber, and top is provided with the first jet chimney 3, and lower end is provided with slurry outlet, institute
It states slurry outlet and is connected by the first slurry pipeline with the feed pipe 208 for sealing blocking apparatus 2, be provided with liquid level in neutralization chamber 1
Transmitter 4, double flange plug-in type differential pressure transmitters of the fluid level transmitter 4 using diaphragm seal, model EJA118N, first
The first control valve 5 is provided on slurry pipeline, the liquid level signal that fluid level transmitter 4 will test passes to display controller
15, display controller 15 controls the aperture of the first control valve 5；Using liquid level self-regulated, it is ensured that the control of neutralization chamber liquid level is steady
It is fixed.
Blocking apparatus is sealed by filtering outer cylinder 201, filtering inner cylinder 202, sealing flange 203, gasket seal 204, slag-drip opening
205, slag-discharging valve 206, liquid drain hole 207, feed pipe 208, discharge nozzle 209, scraping wings 210, push rod 211, sealed outer cylinder 212,
Airtight and watertight padding 213, gland 214, Cylinder mount bracket 215 and cylinder 216 form.
The upper end of filtering outer cylinder 201 is provided with sealing flange 203, between sealing flange 203 and the top for filtering outer cylinder 201
It is provided with gasket seal 204.Filtering 201 bottom surface of outer cylinder is provided centrally with slag-drip opening 205, connects residual cake valve on slag-drip opening 205
Door 206.Slag-discharging valve 206 is gas control ball valve, and the outlet of gas control ball valve is provided with storage slag bucket 14.
It is cased with filtering inner cylinder 202 in filtering outer cylinder 201, filters between the barrel of inner cylinder 202 and the barrel of filtering outer cylinder 201
There is gap, filtering inner cylinder 202 is the cylinder of upper and lower opening.Filter inner cylinder 202 bottom end and 205 connection of slag-drip opening, top with
Sealing flange 203 contacts.Filter and be distributed with liquid drain hole 207 on the side wall of inner cylinder 202, the top of filtering outer cylinder 201 be provided with into
Expects pipe 208, feed pipe 208 reach in filtering 202 top of inner cylinder, and the lower end of filtering outer cylinder 201 is provided with discharge nozzle 209.Charging
Pipe 208 and discharge nozzle 209 are located at the opposite side of filtering outer cylinder 201.
Scraping wings 210 is additionally provided in filtering inner cylinder 202, and the upside of scraping wings 210 connects push rod 211, and push rod 211 is from close
The centre bore of envelope flange 203 reaches outside filtering inner cylinder 202.
Sealing device is provided on the centre bore of sealing flange 203, sealing device includes the center that sealing flange 3 is arranged in
Sealed outer cylinder 212 on the aperture of hole, sealed outer cylinder 212 are located at 203 top surface of sealing flange, are filled with sealing in sealed outer cylinder 212
Filler 213, push rod 211 pass through the gland 214 on 212 top of sealed outer cylinder and the cylinder 216 for being located at 201 top of filtering outer cylinder
Piston rod be connected.Gland 214 is bolted on 203 top surface of sealing flange.
203 top surface of sealing flange is equipped with Cylinder mount bracket 215, and Cylinder mount bracket is portal frame or tubular frame.Gas
Cylinder 216 is mounted on the top surface of Cylinder mount bracket 215.
One effect flash chamber includes effect flash tank 6, the one effect heater 7 and an effect circulation for being cascaded and being formed closed loop
Pump 8.Specific: the bottom end Guan Yuyi effect circulating pump 8 of the effect flash tank 6 is connected, the outlet conduit of the effect circulating pump 8
With one effect 7 cold side import of heater be connected, one effect heater 7 using heating steam heating, one effect heater 7 hot side outlet and
One effect 6 centre inlet of flash tank is connected.Discharging branch pipe is additionally provided on the outlet conduit of one effect circulating pump 8.
The upper gaseous phase import of one effect flash tank 6 is connected with first jet chimney 3 on 1 top of neutralization chamber, to neutralization reaction
Heat is utilized.And can effective guarantee abnormal conditions gas phase run material be collected into an effect flash chamber, will not steam take out of pollution it is cold
Condensate.
Two effect flash chambers include that two effect flash tanks 9, the two effect heaters 10 for being cascaded and being formed closed loop and two effects are followed
Ring pump 11.Specific: the bottom end pipe of the two effects flash tank 9 is connected with two effect circulating pumps 11, and the two effects circulating pump 11 goes out
Mouthful pipeline is connected with two effect 10 cold side imports of heater, and the hot side import of two effect heaters 10 imitates the at the top of flash tank 6 with one
Two jet chimneys (vapor discharge channel in an effect flash tank 6) are connected, the hot side outlet of two effect heaters 10 and two effect flash tanks 9
Centre inlet is connected.The lower part of the two effects flash tank 9 is additionally provided with liquid-phase outlet and is connected with an effect circulating pump 8.
The discharge nozzle 209 for sealing blocking apparatus 2 passes through the fluid inlet of the second slurry pipeline and two effect 9 middle and lower parts of flash tank
It is connected.The second control valve 13 is provided on second slurry pipeline.
It seals and is provided with differential pressure transmitter 12 between the feed pipe 208 and discharge nozzle 209 of blocking apparatus 2, sealing is intercepted
The stopping state of device 2 is detected.Differential pressure transmitter 12 uses differential pressure transmitter with sealed type septum, model EJA118W, method
Blue formula installation, diaphragm pressure transmission, capillary impulse.The positive side pressure detecting probe of differential pressure transmitter 12 is installed on the first slurry pipeline
On, negative side pressure detecting probe is installed on the second slurry pipeline.
The signal output end of differential pressure transmitter 12 and fluid level transmitter 4 is inputted with the pressure difference signal of display controller 15 respectively
End is connected with liquid level signal input terminal, display controller model SWP-C803.Differential pressure value is shown, and threshold can be carried out to differential pressure
Value setting and alarm actuating contact output.
Each control terminal of display controller 15 respectively with the first control valve 5, the second control valve 13, cylinder 216 and
Slag-discharging valve 206 is connected.Control system uses PLC programmable controller, model S7-200.
Deslagging automatic control process are as follows:
The differential pressure measuring value that differential pressure transmitter 12 will test passes to display controller 15, sets when differential pressure detected value reaches
Determine threshold value, display controller SWP-C803 exports alarm actuating contact signal, is judged as that intercepting filter device 2 blocks seriously, need into
Row deslagging, PLC export electric signal, close the first control valve 5, delay closed the second control valve 13 after 8 seconds, then opened deslagging
Valve 206 opens cylinder 216 and releases slag, is then shut off cylinder 216, is delayed 5 seconds and closes slag-discharging valve 206, opens the second control
Valve 13 processed, then the first control valve 5 is opened, entire deslagging process is completed.This control flow is this field routine techniques.
Certain deslagging can also manually control deslagging according to the differential pressure signal of pressure difference transmitter 12, i.e., according to same stream
The first control valve 5 is turned off manually in journey, and delay closed the second control valve 13 after 8 seconds, then opened slag-discharging valve 206, opened gas
Cylinder 216 releases slag, is then shut off cylinder 216, is delayed 5 seconds and closes slag-discharging valve 206, opens the second control valve 13, then beat
The first control valve 5 is opened, entire deslagging process is completed.
When the liquid level signal for the neutralization chamber that fluid level transmitter 4 will test passes to display controller 15, display controller
The aperture of 15 the first control valves 5 of control.Using liquid level self-regulated, it is ensured that the control of neutralization chamber liquid level is stablized.It can certainly
The aperture of the first control valve 5 is manually adjusted according to the liquid level signal detected.
The present invention is not limited to the above embodiment, it will be understood by those skilled in the art that: do not departing from the present invention
Principle and objective in the case where a variety of change, modification, replacement and modification, the scope of the present invention can be carried out to these embodiments
It is defined by the claims and their equivalents.
Claims (7)
1. a kind of ammonium phosphate of slurry concentration process neutralization reaction system, including neutralization chamber, sealing blocking apparatus, an effect flash chamber and two effect flash distillations
Room；
The neutralization chamber is sealing neutralization chamber, and top is provided with the first jet chimney, and lower end is provided with slurry outlet, described
Slurry outlet is connected by the first slurry pipeline with the feed pipe of sealing blocking apparatus, and the is provided on the first slurry pipeline
One control valve；
The one effect flash chamber includes the effect flash tank, an effect heater and an effect circulation for being cascaded and being formed closed loop
Pump, the two effects flash chamber include the two effect flash tanks, two effect heaters and two effect circulating pumps for being cascaded and being formed closed loop,
The upper gaseous phase import of the one effect flash tank is connected with first jet chimney on neutralization chamber top；The sealing blocking apparatus
Discharge nozzle is connected by the second slurry pipeline with the fluid inlet of two effect flash tank middle and lower parts, and the lower part of the two effects flash tank is also
It is provided with liquid-phase outlet to be connected with an effect circulating pump, is provided with the second control valve on the second slurry pipeline, feature exists
In: fluid level transmitter is provided in the neutralization chamber；
The sealing blocking apparatus includes filtering outer cylinder, and the upper end of the filtering outer cylinder is provided with sealing flange, and bottom surface is set
It is equipped with slag-drip opening, slag-discharging valve is connected on the slag-drip opening, filtering inner cylinder is cased in the filtering outer cylinder, the filtering inner cylinder
There are gap, the bottom end of the filtering inner cylinder and slag-drip opening connection, top and Sealing Method between barrel and the barrel for filtering outer cylinder
Liquid drain hole is distributed on the side wall of the filtering inner cylinder in orchid contact, and the top of the filtering outer cylinder is provided with feed pipe, it is described into
Expects pipe reaches in filtering inner cylinder top, and the lower end of the filtering outer cylinder is provided with discharge nozzle；It is additionally provided in the filtering inner cylinder
Scraping wings, the upside of the scraping wings connect push rod, and the push rod reaches outside filtering inner cylinder from the centre bore of sealing flange；
Sealing device is provided on the centre bore of the sealing flange, the sealing device includes the center that sealing flange is arranged in
Sealed outer cylinder on the aperture of hole, the sealed outer cylinder is interior to be filled with airtight and watertight padding, and the push rod passes through filling out for sealed outer cylinder top
Material gland is connected with the piston rod for the cylinder being located above filtering outer cylinder；
Differential pressure transmitter, the positive side of the differential pressure transmitter are provided between the feed pipe and discharge nozzle of the sealing blocking apparatus
Pressure detecting probe is installed on the first slurry pipeline, and negative side pressure detecting probe is installed on the second slurry pipeline.
2. ammonium phosphate of slurry concentration process neutralization reaction system according to claim 1, it is characterised in that: the sealing flange top surface installation
There is Cylinder mount bracket, the cylinder is mounted on Cylinder mount bracket.
3. ammonium phosphate of slurry concentration process neutralization reaction system according to claim 1 or claim 2, it is characterised in that: the gland passes through
Bolt is fixed on sealing flange top surface.
4. ammonium phosphate of slurry concentration process neutralization reaction system according to claim 3, it is characterised in that: the sealing flange and filtering are outer
Gasket seal is provided between the top of cylinder.
5. ammonium phosphate of slurry concentration process neutralization reaction system according to claim 4, it is characterised in that: the feed pipe and discharge nozzle point
The opposite side of outer cylinder Wei Yu not filtered.
6. ammonium phosphate of slurry concentration process neutralization reaction system according to claim 5, it is characterised in that: the slag-discharging valve is gas control ball
Valve.
7. ammonium phosphate of slurry concentration process neutralization reaction system according to claim 6, it is characterised in that: the differential pressure transmitter and liquid level
The signal output end of transmitter is connected with the pressure difference signal input terminal of display controller and liquid level signal input terminal respectively, described aobvious
Show that each control terminal of controller is connected with the first control valve, the second control valve, cylinder and slag-discharging valve respectively.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811403565.9A CN109179354B (en) | 2018-11-23 | 2018-11-23 | Slurry method ammonium phosphate neutralization reaction system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811403565.9A CN109179354B (en) | 2018-11-23 | 2018-11-23 | Slurry method ammonium phosphate neutralization reaction system |
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| CN109179354A true CN109179354A (en) | 2019-01-11 |
| CN109179354B CN109179354B (en) | 2023-06-23 |
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ID=64938259
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112408349A (en) * | 2020-11-28 | 2021-02-26 | 贵州开磷集团矿肥有限责任公司 | Method for producing powdery MAP by slurry method |
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|---|---|---|---|---|
| GB1248686A (en) * | 1968-03-25 | 1971-10-06 | Swift Agricultural Chem Corp | Ammonium polyphosphate production |
| US4239739A (en) * | 1979-11-06 | 1980-12-16 | Tennessee Valley Authority | Manufacture of purified diammonium phosphate |
| CN1706745A (en) * | 2005-04-08 | 2005-12-14 | 陈所安 | Ammonium carbonate process of producing monoammonium phosphate |
| CN101717278A (en) * | 2009-11-26 | 2010-06-02 | 中化重庆涪陵化工有限公司 | Method for producing diammonium phosphate by concentrating semi-acidic slurry and secondary ammonization and concentration integrated device |
| CN103318864A (en) * | 2013-06-21 | 2013-09-25 | 江苏绿陵润发化工有限公司 | Ammonium phosphate flash evaporation chamber improved structure |
| CN205838577U (en) * | 2016-06-22 | 2016-12-28 | 中化重庆涪陵化工有限公司 | Ammonium phosphate of slurry concentration process produces with concentrating material-passing system |
| CN209128039U (en) * | 2018-11-23 | 2019-07-19 | 中化重庆涪陵化工有限公司 | Ammonium phosphate of slurry concentration process neutralization reaction system |
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2018
- 2018-11-23 CN CN201811403565.9A patent/CN109179354B/en active Active
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB1248686A (en) * | 1968-03-25 | 1971-10-06 | Swift Agricultural Chem Corp | Ammonium polyphosphate production |
| US4239739A (en) * | 1979-11-06 | 1980-12-16 | Tennessee Valley Authority | Manufacture of purified diammonium phosphate |
| CN1706745A (en) * | 2005-04-08 | 2005-12-14 | 陈所安 | Ammonium carbonate process of producing monoammonium phosphate |
| CN101717278A (en) * | 2009-11-26 | 2010-06-02 | 中化重庆涪陵化工有限公司 | Method for producing diammonium phosphate by concentrating semi-acidic slurry and secondary ammonization and concentration integrated device |
| CN103318864A (en) * | 2013-06-21 | 2013-09-25 | 江苏绿陵润发化工有限公司 | Ammonium phosphate flash evaporation chamber improved structure |
| CN205838577U (en) * | 2016-06-22 | 2016-12-28 | 中化重庆涪陵化工有限公司 | Ammonium phosphate of slurry concentration process produces with concentrating material-passing system |
| CN209128039U (en) * | 2018-11-23 | 2019-07-19 | 中化重庆涪陵化工有限公司 | Ammonium phosphate of slurry concentration process neutralization reaction system |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112408349A (en) * | 2020-11-28 | 2021-02-26 | 贵州开磷集团矿肥有限责任公司 | Method for producing powdery MAP by slurry method |
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