CN105198520B - Prevent the method that ammonium nitrate fires in high-tower granulation production nitrate-based compound fertilizer technique - Google Patents
Prevent the method that ammonium nitrate fires in high-tower granulation production nitrate-based compound fertilizer technique Download PDFInfo
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- CN105198520B CN105198520B CN201510500998.6A CN201510500998A CN105198520B CN 105198520 B CN105198520 B CN 105198520B CN 201510500998 A CN201510500998 A CN 201510500998A CN 105198520 B CN105198520 B CN 105198520B
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Abstract
The method that ammonium nitrate fires in high-tower granulation production nitrate-based compound fertilizer technique is prevented the invention discloses a kind of; this method is by carrying out temperature implementing monitoring to each reactor on production line preventing the high-tower granulation from producing in nitrate-based compound fertilizer technique on the device that fires of ammonium nitrate setting overtemperature alarm interlocking protective system, and the release sequence by changing material reduces time of contact of potassium chloride and ammonium nitrate.Catalytic action The present invention reduces potassium chloride to ammonium nitrate, reduces and fires probability, improves the safety of high-tower granulation production nitrate-based compound fertilizer technique.
Description
Technical field
The invention belongs to the security technology areas of high-tower granulation production nitrate-based compound fertilizer technique more particularly to one kind to prevent
The method that ammonium nitrate fires in high-tower granulation production nitrate-based compound fertilizer technique.
Background technique
It is ammonium nitrate that high-tower melting granulation, which produces the primary raw material in nitrate-based compound fertilizer technique, and ammonium nitrate is a kind of application
Extensive substance, can not only be used for the important source material of agrochemical, and be a kind of strong oxidizer and self-reactive substance.Under room temperature,
Ammonium nitrate is stable, but as the temperature rises and the effect of certain impurity, can seriously affect or change its physics and change
Performance is learned, leads to the unstable of system or even sets off an explosion.The significant explosion accident in relation to ammonium nitrate showed ammonium nitrate in recent years
It is that a kind of typical theoretically contingency occurrence probability is low, the dangerous substance of accident actually but frequently occurs.
High-tower melting granulation produces in nitrate-based compound fertilizer technique before being granulated high tower cooler, and ammonium nitrate is melting always
State, and in hot environment.Along with the potassium chloride added in nitrate-based compound fertilizer has catalysis to make the decomposition of ammonium nitrate
With, therefore the stability of mixed material is worse, ammonium nitrate, which is easier to decompose, at this time occurs blast accident.Similar accident is at home
Through occurring, domestic at present there are about more than 100 set high-tower melting granulation devices, most of without detailed safe design, to construction
Scene and construction personnel bring great security risk.
Summary of the invention
The present invention be in place of avoiding above-mentioned the shortcomings of the prior art provide it is a kind of can be improved safety prevent height
Tower is granulated the method that ammonium nitrate fires in production nitrate-based compound fertilizer technique.
The technical scheme adopted by the invention is as follows:
It is a kind of to prevent the device that ammonium nitrate fires in high-tower granulation production nitrate-based compound fertilizer technique, including overtemperature alarm connection
It locks protection system, belt feeder and the medial launder being sequentially connected, melting device, No.1 mixing channel, No. two mixing channels, be granulated
Machine, ammonium nitrate are sequentially sent to medial launder, melting device, No.1 mixing channel, No. two mixing channels, pelletizers；The overtemperature alarm connection
Locking protection system includes controller, the first temperature sensor being arranged on medial launder, the second temperature being arranged on melting device
Sensor, the third temperature sensor being arranged on No.1 mixing channel and the 4th temperature sensing being arranged on No. two mixing channels
Device；In process of production, monoammonium phosphate and potassium dihydrogen phosphate need to be launched into No.1 mixing channel, need to be launched into No. two mixing channels
Potassium sulfate and potassium chloride, the first, second, third, fourth temperature sensor and belt feeder are connect with controller communication.
It is described that prevent the device that fires of ammonium nitrate in high-tower granulation production nitrate-based compound fertilizer technique further include heating steam
Supply unit, the medial launder, melting device, No.1 mixing channel, No. two mixing channels pass through heating steam conveying pipeline and heating respectively
Steam supply unit is connected, and each steam pipeline road of heating is provided with heating steam valve.
Described to prevent the device that fires of ammonium nitrate in high-tower granulation production nitrate-based compound fertilizer technique further include water supply portion, institute
State medial launder, melting device, No.1 mixing channel, No. two mixing channels, pelletizers pass through supply line respectively and are connected with water supply portion, respectively give
Water-supply valve is provided in water lines.
Described No. two are provided with uniform mixer between mixing channel and pelletizer.
The medial launder passes through ammonium nitrate transfer pipeline with No.1 mixing channel with melting device, melting device and is connected, medial launder
Feed end be provided with the first ammonium nitrate feed pump, be provided with second on the ammonium nitrate transfer pipeline between medial launder and melting device
Ammonium nitrate feed pump is provided with ammonium nitrate solution inlet valve on the ammonium nitrate transfer pipeline between melting device and No.1 mixing channel；
It is defeated that the No.1 mixing channel with No. two mixing channels, No. two mixing channels and uniform mixer, uniform mixer and pelletizer passes through mixed material
Send pipeline be connected, be provided on the mixed material transfer pipeline between No.1 mixing channel and No. two mixing channels the first mixed material into
Expect valve, is provided with the second mixed material inlet valve on No. two mixed material transfer pipelines between mixing channel and uniform mixer, it is mixed
Third mixed material inlet valve is provided on mixed material transfer pipeline between device and pelletizer.
Discharge valve is provided on the medial launder, melting device, No.1 mixing channel, No. two mixing channels and uniform mixer.
The feed end of the melting device is additionally provided with the first feedstock valve, and the feed end of No.1 mixing channel is additionally provided with
Two feedstock valves, the feed end of No. two mixing channels are additionally provided with third feedstock valve.
The method that ammonium nitrate fires in high-tower granulation production nitrate-based compound fertilizer technique is prevented the invention also discloses a kind of,
This method comprises the following steps:
Step 1: the device that design prevents ammonium nitrate from firing, which need to include overtemperature alarm interlocking protective system, belt
Batcher, heating steam supply unit, water supply portion and the medial launder being sequentially connected, melting device, No.1 mixing channel, No. two mixing
Slot, uniform mixer, pelletizer, ammonium nitrate be sequentially sent to medial launder, melting device, No.1 mixing channel, No. two mixing channels, uniform mixer,
Pelletizer；
The medial launder, melting device, No.1 mixing channel, No. two mixing channels pass through heating steam conveying pipeline and heating respectively
Steam supply unit is connected, and each steam pipeline road of heating is provided with heating steam valve；The medial launder, melting device, No.1
Mixing channel, No. two mixing channels, pelletizers pass through supply line respectively and are connected with water supply portion, are provided with water supply on each supply line
Valve；
The medial launder is both needed to be connected by ammonium nitrate transfer pipeline with melting device, melting device with No.1 mixing channel, in
Between slot feed end be arranged the first ammonium nitrate feed pump, between medial launder and melting device ammonium nitrate transfer pipeline setting second
Ammonium nitrate solution inlet valve is arranged on the ammonium nitrate transfer pipeline between melting device and No.1 mixing channel for ammonium nitrate feed pump；
The No.1 mixing channel and No. two mixing channels, No. two mixing channels and uniform mixer, uniform mixer and pelletizer are both needed to pass through mixed material
Transfer pipeline is connected, and the first mixed material is arranged on the mixed material transfer pipeline between No.1 mixing channel and No. two mixing channels
The second mixed material inlet valve is arranged on No. two mixed material transfer pipelines between mixing channel and uniform mixer in inlet valve；?
Third mixed material inlet valve is provided on mixed material transfer pipeline between mixed device and pelletizer；Medial launder, melting device,
Discharge valve is respectively provided on No.1 mixing channel, No. two mixing channels and uniform mixer；Melting device feed end be arranged the first raw material into
Expect valve, the second feedstock valve is set in the feed end of No.1 mixing channel, third raw material is set in the feed end of No. two mixing channels
Inlet valve；
The overtemperature alarm interlocking protective system need to include controller, be arranged on medial launder the first temperature sensor,
The second temperature sensor that is arranged on melting device, the third temperature sensor being arranged on No.1 mixing channel and it is arranged two
The 4th temperature sensor on number mixing channel distinguishes the first, second, third, fourth temperature sensor and belt feeder
Communication connection is carried out with controller, while medial launder, melting device, No.1 mixing channel, No. two mixing being respectively set in controller
The alarm temperature value of slot；
Step 2: monoammonium phosphate and potassium dihydrogen phosphate being launched in No.1 mixing channel by belt feeder, mixed at No. two
Potassium sulfate and potassium chloride are launched in slot；
Step 3: with the temperature in the first temperature sensor real-time monitoring medial launder and collected temperature value is real-time
It is transmitted to controller, is passed with the temperature in second temperature sensor real-time monitoring melting device and in real time collected temperature value
Controller is transported to, it is with the temperature in third temperature sensor real-time monitoring No.1 mixing channel and collected temperature value is real-time
It is transmitted to controller, is passed with the temperature in No. two mixing channels of the 4th temperature sensor real-time monitoring and in real time collected numerical value
Transport to controller；When the temperature in medial launder, melting device, No.1 mixing channel, No. two mixing channels is more than setting value, controller hair
Control instruction out.
In the step 1, the alarm temperature value in medial launder is 180 DEG C.
In the step 1, the alarm temperature value in melting device is 175 DEG C.
In the step 1, the alarm temperature value in No.1, No. two mixing channels is 175 DEG C.
In the step 3, when the temperature in medial launder reaches 190 DEG C, the first ammonium nitrate feed pump of controller control closing,
The heating steam valve of heating steam pipeline road between medial launder and heating steam valve supply unit, while controller control is opened
Open the water-supply valve on the supply line between the discharge valve, medial launder and water supply portion of medial launder.
In the step 3, when the temperature in melting device reaches 185 DEG C, the second ammonium nitrate feed pump of controller control closing,
The heating steam valve of heating steam pipeline road between melting device and heating steam valve supply unit, while controller control is opened
Open the water-supply valve on the supply line between the discharge valve, melting device and water supply portion of melting device.
In the step 3, when the temperature in No.1, No. two mixing channels reaches 185 DEG C, controller control closing melting device,
Ammonium nitrate solution inlet valve, and control belt feeder and stop feed, while No.1 mixing channel and heating are closed in controller control
The heating steam valve and No. two mixing channels and heating steam valve of heating steam pipeline road between steam valve supply unit supply
To the heating steam valve of the heating steam pipeline road between portion, controller also controls simultaneously and opens No.1, No. two mixing channels
The water-supply valve on supply line between water supply portion.
During parking maintenance or replacement pelletizer spray head, need strict control ammonium nitrate in medial launder and melting device
Residence time in No.1 mixing channel, No. two mixing channels of residence time and mixed material, specific time control are as follows: nitre
Residence time of the sour ammonium in medial launder need to be less than 2.5 hours, and residence time of the ammonium nitrate in melting device need to be small less than 1.5
When, residence time of the mixed material in No.1, No. two mixing channels was both needed to less than 1 hour.
By adopting the above-described technical solution, obtained by the present invention have the beneficial effect that
1, The present invention reduces high-tower granulation production nitrato compound fertilizer technology in potassium chloride and ammonium nitrate time of contact,
Reduce catalytic action of the potassium chloride to decomposing ammonium nitrate.
2, the present invention be provided with each position high temperature alarm with it is chain, reduce the thermal runaway risk of entire technique.
3, the present invention is provided with maximum residence time of each material in each reaction vessel, produces nitrato for high-tower granulation
Compound fertilizer technology provides guide for method in parking maintenance and replacement prilling spry operating condition.
4, invention increases the safeties of high-tower granulation production nitrato compound fertilizer technology, can be at home on hundred covering devices
It practices.
Detailed description of the invention
Fig. 1 is the part knot for preventing high-tower granulation from producing ammonium nitrate blasting device in nitrate-based compound fertilizer technique in the present invention
Structure schematic diagram.
Wherein,
1, the first ammonium nitrate feed pump 2, water-supply valve 3, heating steam valve 4, discharge valve 5, the second ammonium nitrate into
Material pump the 6, first feedstock valve 7, the first temperature sensor 8, medial launder 9, second temperature sensor 10, nitric acid
Ammonium salt solution inlet valve 11, the second feedstock valve 12, third temperature sensor 13, No.1 mixing channel 14, two it is mixed
Close slot 15, the first mixed material inlet valve 16, the 4th temperature sensor 17, third feedstock valve 18, uniform mixer
19, the second mixed material inlet valve 20, pelletizer 21, melting device 22, third mixed material inlet valve
Specific embodiment
The present invention is described in further detail with specific embodiment with reference to the accompanying drawing, but the present invention is not limited to
These embodiments.
As shown in Figure 1, a kind of prevent high-tower granulation from producing the device that ammonium nitrate fires in nitrate-based compound fertilizer technique, including
Overtemperature alarm interlocking protective system, heating steam supply unit, water supply portion, belt feeder and the medial launder 8 being sequentially connected melt
Melt device 21, No.1 mixing channel 13, No. two mixing channels 14, uniform mixer 18, pelletizers 20, ammonium nitrate is sequentially sent to medial launder 8, melts
Melt device 21, No.1 mixing channel 13, No. two mixing channels 14, pelletizers 20.
13, No. two medial launder 8, melting device 21, No.1 mixing channel mixing channels 14 pass through heating steam pipeline respectively
Road is connected with heating steam supply unit, and each steam pipeline road of heating is provided with heating steam valve 3；The medial launder 8 melts
Melt device 21, No.1 mixing channel 13, No. two mixing channels 14, pelletizers 20 to be connected by supply line with water supply portion respectively, each water supply
Water-supply valve 2 is provided on pipeline；The medial launder 8 passes through nitric acid with melting device 21, melting device 21 and No.1 mixing channel 13
Ammonium transfer pipeline is connected, and the feed end of medial launder 8 is provided with the first ammonium nitrate feed pump 1, between medial launder 8 and melting device 21
The second ammonium nitrate feed pump 5 is provided on ammonium nitrate transfer pipeline, the ammonium nitrate between melting device 21 and No.1 mixing channel 13 is defeated
It send and is provided with ammonium nitrate solution inlet valve 10 on pipeline；14, No. two mixing channels 14 of the No.1 mixing channel 13 and No. two mixing channels
It is connected by mixed material transfer pipeline with uniform mixer 18, uniform mixer 18 with pelletizer 20, No.1 mixing channel 13 and No. two are mixed
It closes and is provided with the first mixed material inlet valve 15, No. two mixing channels 14 and uniform mixer on the mixed material transfer pipeline between slot 14
The second mixed material inlet valve 19 is provided on mixed material transfer pipeline between 18, between uniform mixer 18 and pelletizer 20
Third mixed material inlet valve 22 is provided on mixed material transfer pipeline；The medial launder 8, melting device 21, No.1 mixing channel
13, discharge valve 4 is provided on No. two mixing channels 14 and uniform mixer 18；The feed end of the melting device 21 is additionally provided with first
Feedstock valve 6, the feed end of No.1 mixing channel 13 are additionally provided with the second feedstock valve 11, the feed end of No. two mixing channels 14
It is additionally provided with third feedstock valve 17.The overtemperature alarm interlocking protective system includes controller, is arranged on medial launder 8
First temperature sensor 7, the second temperature sensor 9 being arranged on melting device 21, the third being arranged on No.1 mixing channel 13
Temperature sensor 12 and the 4th temperature sensor 16 being arranged on No. two mixing channels 14；It is contained in the No.1 mixing channel 13
There are monoammonium phosphate and potassium dihydrogen phosphate, is loaded with potassium sulfate and potassium chloride in No. two mixing channels 14, first, second, third,
4th temperature sensor and belt feeder are connect with controller communication.
The method that ammonium nitrate fires in high-tower granulation production nitrate-based compound fertilizer technique is prevented the invention also discloses a kind of,
This method comprises the following steps:
Step 1: the device that design prevents ammonium nitrate from firing, as shown in Figure 1, the device need to include overtemperature alarm interlock protection
System, belt feeder, heating steam supply unit, water supply portion and the medial launder 8 being sequentially connected, melting device 21, No.1 mixing
Slot 13, No. two mixing channels 14, uniform mixer 18, pelletizers 20, ammonium nitrate are sequentially sent to medial launder 8, melting device 21, No.1 mixing
Slot 13, No. two mixing channels 14, uniform mixer 18, pelletizers 20；
13, No. two medial launder 8, melting device 21, No.1 mixing channel mixing channels 14 pass through heating steam pipeline respectively
Road is connected with heating steam supply unit, and each steam pipeline road of heating is provided with heating steam valve 3；The medial launder 8 melts
Melt device 21, No.1 mixing channel 13, No. two mixing channels 14, pelletizers 20 to be connected by supply line with water supply portion respectively, each water supply
Water-supply valve 2 is provided on pipeline；
The medial launder 8 is both needed to melting device 21, melting device 21 and No.1 mixing channel 13 through ammonium nitrate transfer pipeline phase
Even, first ammonium nitrate feed pump 1 is set in the feed end of medial launder 8, the ammonium nitrate conveying between medial launder 8 and melting device 21
The second ammonium nitrate feed pump 5 is arranged in pipeline, is arranged on the ammonium nitrate transfer pipeline between melting device 21 and No.1 mixing channel 13
Ammonium nitrate solution inlet valve 10；The No.1 mixing channel 13 and 14, No. two mixing channels 14 of No. two mixing channels and uniform mixer 18 mix
Device 18 is both needed to be connected by mixed material transfer pipeline with pelletizer 20, between No.1 mixing channel 13 and No. two mixing channels 14
First mixed material inlet valve 15 is set on mixed material transfer pipeline, the mixing between No. two mixing channels 14 and uniform mixer 18
The second mixed material inlet valve 19 of material delivery pipe road setting；Mixed material delivery pipe between uniform mixer 18 and pelletizer 20
Road is provided with third mixed material inlet valve 22；13, No. two medial launder 8, melting device 21, No.1 mixing channel mixing channels 14 with
And discharge valve 4 is respectively provided on uniform mixer 18；First feedstock valve 6 is set in the feed end of melting device 21, in No.1 mixing channel
The second feedstock valve 11 is arranged in 13 feed end, and third feedstock valve 17 is arranged in the feed end of No. two mixing channels 14；
The overtemperature alarm interlocking protective system need to include controller, the first temperature sensor being arranged on medial launder 8
7, the second temperature sensor 9 that is arranged on melting device 21, the third temperature sensor 12 being arranged on No.1 mixing channel 13 with
And the 4th temperature sensor 16 on No. two mixing channels 14 is set, by the first, second, third, fourth temperature sensor and
Belt feeder carries out communication connection with controller respectively, while medial launder 8, melting device 21, one being respectively set in controller
The alarm temperature value of number 13, No. two mixing channels 14 of mixing channel, specifically: the alarm temperature value in medial launder 8 is 180 DEG C, melting
Alarm temperature value in device 21 is 175 DEG C, and the alarm temperature value in No.1, No. two mixing channels is 175 DEG C；
Step 2: monoammonium phosphate and potassium dihydrogen phosphate are launched in No.1 mixing channel 13 by belt feeder, it is mixed at No. two
It closes and launches potassium sulfate and potassium chloride in slot 14；
Step 3: with the temperature in 7 real-time monitoring medial launder 8 of the first temperature sensor and collected temperature value is real
When be transmitted to controller, when the temperature in medial launder 8 reaches 190 DEG C, controller control close the first ammonium nitrate feed pump 1,
The heating steam valve 3 of heating steam pipeline road between medial launder 8 and heating steam valve supply unit, while controller controls
Open the water-supply valve 2 on the supply line between the discharge valve 4, medial launder 8 and water supply portion of medial launder 8；It is sensed with second temperature
Temperature in 9 real-time monitoring melting device 21 of device and by collected temperature value real-time Transmission to controller, when in melting device 21
Temperature when reaching 185 DEG C, the second ammonium nitrate feed pump 5, melting device 21 and heating steam valve supply unit are closed in controller control
Between heating steam pipeline road heating steam valve 3, while the discharge valve 4, molten of melting device 21 is opened in controller control
Melt the water-supply valve 2 on the supply line between device 21 and water supply portion；With 12 real-time monitoring No.1 mixing channel of third temperature sensor
Temperature in 13 and by collected temperature value real-time Transmission to controller, with 16 real-time monitoring of the 4th temperature sensor two
Temperature in mixing channel 14 and by collected numerical value real-time Transmission to controller；When the temperature in No.1, No. two mixing channels reaches
When to 185 DEG C, melting device 21, ammonium nitrate solution inlet valve 10 are closed in controller control, and are controlled belt feeder and stopped feed,
While controller control is closed No.1 mixing channel 13 and is heated adding for the heating steam pipeline road between steam valve supply unit
The heating of heating steam pipeline road between hot steam valve 3 and No. two mixing channels 14 and heating steam valve supply unit is steamed
Steam valve 3, controller also controls simultaneously opens No.1, the water-supply valve 2 on No. two supply lines between mixing channel and water supply portion.
During parking maintenance or replacement pelletizer spray head, need strict control ammonium nitrate in medial launder 8 and melting device
The residence time of residence time and mixed material in 13, No. two mixing channels 14 of No.1 mixing channel in 21, specific time control
Be made as: residence time of the ammonium nitrate in medial launder 8 need to be less than 2.5 hours, and residence time of the ammonium nitrate in melting device 21 needs
Less than 1.5 hours, residence time of the mixed material in No.1, No. two mixing channels was both needed to less than 1 hour.
The part that do not address in the present invention uses or uses for reference prior art and can be realized.
In addition, term " first ", " second ", " third ", " the 4th " are used for description purposes only, and should not be understood as instruction or
Imply relative importance.
Specific embodiment described herein is only to spiritual example explanation of the invention.Belonging to the present invention
Those skilled in the art can make various modifications or additions to the described embodiments or using similar
Mode substitutes, and however, it does not deviate from the spirit of the invention or beyond the scope of the appended claims.
Claims (1)
1. a kind of prevent the method that ammonium nitrate fires in high-tower granulation production nitrate-based compound fertilizer technique, which is characterized in that the party
Method includes the following steps:
Step 1: the device that design prevents ammonium nitrate from firing, which need to include overtemperature alarm interlocking protective system, belt feeding
Machine, heating steam supply unit, water supply portion and the medial launder being sequentially connected, melting device, No.1 mixing channel, No. two mixing channels,
Mixed device, pelletizer, ammonium nitrate are sequentially sent to medial launder, melting device, No.1 mixing channel, No. two mixing channels, uniform mixer, granulations
Machine；
The medial launder, melting device, No.1 mixing channel, No. two mixing channels pass through heating steam conveying pipeline and heating steam respectively
Supply unit is connected, and each steam pipeline road of heating is provided with heating steam valve；The medial launder, melting device, No.1 mixing
Slot, No. two mixing channels, pelletizers pass through supply line respectively and are connected with water supply portion, are provided with water-supply valve on each supply line；
The medial launder is both needed to be connected by ammonium nitrate transfer pipeline with melting device, melting device with No.1 mixing channel, in medial launder
Feed end the first ammonium nitrate feed pump is set, the second nitric acid is arranged in ammonium nitrate transfer pipeline between medial launder and melting device
Ammonium nitrate solution inlet valve is arranged on the ammonium nitrate transfer pipeline between melting device and No.1 mixing channel for ammonium feed pump；It is described
No.1 mixing channel is both needed to convey by mixed material with No. two mixing channels, No. two mixing channels and uniform mixer, uniform mixer and pelletizer
Pipeline is connected, and the charging of the first mixed material is arranged on the mixed material transfer pipeline between No.1 mixing channel and No. two mixing channels
The second mixed material inlet valve is arranged on No. two mixed material transfer pipelines between mixing channel and uniform mixer in valve；Uniform mixer
Third mixed material inlet valve is provided on mixed material transfer pipeline between pelletizer；In medial launder, melting device, No.1
Discharge valve is respectively provided on mixing channel, No. two mixing channels and uniform mixer；In the feed end of melting device, the first feedstock valve is set,
The second feedstock valve is set in the feed end of No.1 mixing channel, third feedstock is set in the feed end of No. two mixing channels
Valve；
The overtemperature alarm interlocking protective system need to include controller, the first temperature sensor being arranged on medial launder, setting
Second temperature sensor on melting device, the third temperature sensor being arranged on No.1 mixing channel and setting are mixed at No. two
Close the 4th temperature sensor on slot, by the first, second, third, fourth temperature sensor and belt feeder respectively with control
Device processed carries out communication connection, while medial launder, melting device, No.1 mixing channel, No. two mixing channels is respectively set in controller
Alarm temperature value；
Step 2: monoammonium phosphate and potassium dihydrogen phosphate being launched in No.1 mixing channel by belt feeder, in No. two mixing channels
Launch potassium sulfate and potassium chloride；
Step 3: with the temperature in the first temperature sensor real-time monitoring medial launder and by collected temperature value real-time Transmission
To controller, extremely with the temperature in second temperature sensor real-time monitoring melting device and by collected temperature value real-time Transmission
Controller, with the temperature in third temperature sensor real-time monitoring No.1 mixing channel and by collected temperature value real-time Transmission
To controller, extremely with the temperature in No. two mixing channels of the 4th temperature sensor real-time monitoring and by collected numerical value real-time Transmission
Controller；When the temperature in medial launder, melting device, No.1 mixing channel, No. two mixing channels is more than setting value, controller issues control
System instruction；
In the step 1, the alarm temperature value in medial launder is 180 DEG C；Alarm temperature value in melting device is 175 DEG C；No.1,
Alarm temperature value in No. two mixing channels is 175 DEG C；
In the step 3, when the temperature in medial launder reaches 190 DEG C, the first ammonium nitrate feed pump, centre are closed in controller control
The heating steam valve of heating steam pipeline road between slot and heating steam valve supply unit, while in controller control unlatching
Between water-supply valve on supply line between the discharge valve of slot, medial launder and water supply portion；Temperature in melting device reaches 185 DEG C
When, the heating steam that controller control is closed between the second ammonium nitrate feed pump, melting device and heating steam valve supply unit conveys
Heating steam valve on pipeline, while the water supply between the discharge valve, melting device and water supply portion of melting device is opened in controller control
Water-supply valve on pipeline；When temperature in No.1, No. two mixing channels reaches 185 DEG C, melting device, ammonium nitrate are closed in controller control
Solution feed valve, and control belt feeder and stop feed, while No.1 mixing channel and heating steam valve are closed in controller control
The heating steam valve and No. two mixing channels and heating steam valve supply unit of heating steam pipeline road between supply unit it
Between heating steam pipeline road heating steam valve, controller also controls simultaneously and opens No.1, No. two mixing channels and water supply
The water-supply valve on supply line between portion；
During parking maintenance or replacement pelletizer spray head, strict control ammonium nitrate is needed to stop in medial launder and melting device
Stay the residence time of time and mixed material in No.1 mixing channel, No. two mixing channels, specific time control are as follows: ammonium nitrate
Residence time in medial launder need to be less than 2.5 hours, and residence time of the ammonium nitrate in melting device need to mix less than 1.5 hours
Residence time of the conjunction material in No.1, No. two mixing channels was both needed to less than 1 hour.
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| CN201510500998.6A CN105198520B (en) | 2015-08-14 | 2015-08-14 | Prevent the method that ammonium nitrate fires in high-tower granulation production nitrate-based compound fertilizer technique |
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| CN106810353A (en) * | 2016-12-29 | 2017-06-09 | 贵州芭田生态工程有限公司 | The method of high-tower melting granulation production system and its heat energy recycle |
| CN108261992B (en) * | 2018-01-04 | 2020-01-14 | 中石化上海工程有限公司 | Method for automatically switching front hydrogenation reactor of ethylene device |
| CN114797682B (en) * | 2022-04-27 | 2024-01-23 | 上海化工院检测有限公司 | Quick cooling safety melting kettle |
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| CN201045135Y (en) * | 2007-04-30 | 2008-04-09 | 寿光市利丰化工有限公司 | Tower granulating composite fertilizer production device |
| CN101759478B (en) * | 2009-12-24 | 2012-08-29 | 成都市新都化工股份有限公司 | Preparation method of compound fertilizer |
| CN102584408B (en) * | 2012-03-23 | 2014-01-15 | 河北冀衡赛瑞化工有限公司 | Method for producing nitro-sulfur-based composite fertilizer by full-liquid phase high tower granulation |
| CN104496624B (en) * | 2015-01-13 | 2017-07-18 | 四川美丰化工股份有限公司 | A kind of method and device for producing high tower nitro-compound fertilizer |
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