CN116951747A - Control device and method for phosphate fertilizer hot blast stove - Google Patents
Control device and method for phosphate fertilizer hot blast stove Download PDFInfo
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- CN116951747A CN116951747A CN202310767367.5A CN202310767367A CN116951747A CN 116951747 A CN116951747 A CN 116951747A CN 202310767367 A CN202310767367 A CN 202310767367A CN 116951747 A CN116951747 A CN 116951747A
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- temperature
- hot blast
- blast stove
- temperature range
- limit value
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- 238000000034 method Methods 0.000 title claims abstract description 44
- 239000002686 phosphate fertilizer Substances 0.000 title claims abstract description 13
- 230000001105 regulatory effect Effects 0.000 claims abstract description 44
- 238000010408 sweeping Methods 0.000 claims abstract description 14
- 230000005540 biological transmission Effects 0.000 claims abstract description 8
- 239000007789 gas Substances 0.000 claims description 41
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical group C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 claims description 20
- 239000003345 natural gas Substances 0.000 claims description 10
- 229910019142 PO4 Inorganic materials 0.000 claims description 9
- 239000010452 phosphate Substances 0.000 claims description 9
- NBIIXXVUZAFLBC-UHFFFAOYSA-K phosphate Chemical compound [O-]P([O-])([O-])=O NBIIXXVUZAFLBC-UHFFFAOYSA-K 0.000 claims description 9
- 229910052500 inorganic mineral Inorganic materials 0.000 claims description 7
- 239000011707 mineral Substances 0.000 claims description 7
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 6
- OAICVXFJPJFONN-UHFFFAOYSA-N Phosphorus Chemical compound [P] OAICVXFJPJFONN-UHFFFAOYSA-N 0.000 claims 1
- 239000011574 phosphorus Substances 0.000 claims 1
- 229910052698 phosphorus Inorganic materials 0.000 claims 1
- 238000004519 manufacturing process Methods 0.000 abstract description 8
- 230000009286 beneficial effect Effects 0.000 abstract description 2
- 239000002994 raw material Substances 0.000 description 6
- 230000001680 brushing effect Effects 0.000 description 3
- 239000000446 fuel Substances 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 238000010586 diagram Methods 0.000 description 1
- 238000003912 environmental pollution Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24H—FLUID HEATERS, e.g. WATER OR AIR HEATERS, HAVING HEAT-GENERATING MEANS, e.g. HEAT PUMPS, IN GENERAL
- F24H3/00—Air heaters
- F24H3/02—Air heaters with forced circulation
- F24H3/06—Air heaters with forced circulation the air being kept separate from the heating medium, e.g. using forced circulation of air over radiators
- F24H3/065—Air heaters with forced circulation the air being kept separate from the heating medium, e.g. using forced circulation of air over radiators using fluid fuel
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B02—CRUSHING, PULVERISING, OR DISINTEGRATING; PREPARATORY TREATMENT OF GRAIN FOR MILLING
- B02C—CRUSHING, PULVERISING, OR DISINTEGRATING IN GENERAL; MILLING GRAIN
- B02C23/00—Auxiliary methods or auxiliary devices or accessories specially adapted for crushing or disintegrating not provided for in preceding groups or not specially adapted to apparatus covered by a single preceding group
- B02C23/18—Adding fluid, other than for crushing or disintegrating by fluid energy
- B02C23/24—Passing gas through crushing or disintegrating zone
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24H—FLUID HEATERS, e.g. WATER OR AIR HEATERS, HAVING HEAT-GENERATING MEANS, e.g. HEAT PUMPS, IN GENERAL
- F24H15/00—Control of fluid heaters
- F24H15/20—Control of fluid heaters characterised by control inputs
- F24H15/208—Temperature of the air after heating
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24H—FLUID HEATERS, e.g. WATER OR AIR HEATERS, HAVING HEAT-GENERATING MEANS, e.g. HEAT PUMPS, IN GENERAL
- F24H15/00—Control of fluid heaters
- F24H15/30—Control of fluid heaters characterised by control outputs; characterised by the components to be controlled
- F24H15/305—Control of valves
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24H—FLUID HEATERS, e.g. WATER OR AIR HEATERS, HAVING HEAT-GENERATING MEANS, e.g. HEAT PUMPS, IN GENERAL
- F24H15/00—Control of fluid heaters
- F24H15/30—Control of fluid heaters characterised by control outputs; characterised by the components to be controlled
- F24H15/355—Control of heat-generating means in heaters
- F24H15/36—Control of heat-generating means in heaters of burners
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24H—FLUID HEATERS, e.g. WATER OR AIR HEATERS, HAVING HEAT-GENERATING MEANS, e.g. HEAT PUMPS, IN GENERAL
- F24H9/00—Details
- F24H9/20—Arrangement or mounting of control or safety devices
- F24H9/2064—Arrangement or mounting of control or safety devices for air heaters
- F24H9/2085—Arrangement or mounting of control or safety devices for air heaters using fluid fuel
Landscapes
- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Food Science & Technology (AREA)
- Control Of Combustion (AREA)
Abstract
The invention discloses a control device and a control method for a phosphate fertilizer hot blast stove, wherein the device comprises a hot blast stove and a wind sweeping mill which are connected in sequence, a burner is arranged in the hot blast stove, a first temperature sensor is arranged at an outlet of the hot blast stove, an air blower and a gas regulating valve are respectively arranged at an input end of the burner, and a controlled end of the air blower is coupled with a control end of a frequency converter; the inlet and the outlet of the air-sweeping mill are respectively provided with a conveyor belt and a second temperature sensor, the bottom of the conveyor belt is provided with a belt scale, and the transmission shaft of the air-sweeping mill is coupled with the transmission shaft of the motor; the data output end of the belt scale is coupled with the input end of the PLC, the data output ends of the first temperature sensor and the second temperature sensor are coupled with the feedback signal end of the PLC, and the controlled ends of the frequency converter, the gas regulating valve and the motor are coupled with the control end of the PLC. The beneficial effects of the invention are as follows: the operation parameters of the frequency converter, the gas regulating valve and the motor are automatically regulated in a closed loop, so that the production quality is more stable and reliable.
Description
Technical Field
The invention relates to the field of hot blast stove temperature control, in particular to a phosphate fertilizer hot blast stove control device and method.
Background
The hot blast furnace in the phosphate fertilizer production system provides different heat according to different raw material ore moisture, so that the raw material ore moisture is finally stabilized below 0.5%, and the raw material ore moisture enters the next production flow after being ground in a wind mill. Because the natural gas gun is fast in adjustment speed and large in temperature change, and the phosphate fertilizer raw material is unstable in water content in an open storage yard, the heat of the hot blast stove is difficult to control to be matched with the ore feeding amount of the air brushing mill, so that production fluctuation is large, the product quality is unstable, the natural gas consumption is high, and the production cost is high.
Disclosure of Invention
Aiming at the problem that the heat input of the hot blast stove cannot be matched with the ore feeding amount, the invention provides a control device and a control method of a phosphate fertilizer hot blast stove, and aims to improve the heat output precision of the hot blast stove.
In order to solve the technical problems, the first aspect of the invention provides a control device for a phosphate fertilizer hot blast stove, which comprises a hot blast stove and a wind sweeping mill which are connected in sequence,
the hot blast stove is internally provided with a burner, the outlet of the hot blast stove is provided with a first temperature sensor, the input end of the burner is respectively provided with an air blower and a gas regulating valve, and the controlled end of the air blower is coupled with the control end of the frequency converter;
the inlet and the outlet of the air-sweeping mill are respectively provided with a conveyor belt and a second temperature sensor, a belt scale is arranged at the bottom of the conveyor belt, and a transmission shaft of the air-sweeping mill is coupled with a transmission shaft of a motor;
the data output end of the belt scale is coupled with the input end of the PLC, the data output ends of the first temperature sensor and the second temperature sensor are coupled with the feedback signal end of the PLC, and the frequency converter, the gas regulating valve and the controlled end of the motor are coupled with the control end of the PLC.
In some embodiments, the outlets of the hot blast stove and the air-swept mill are provided with mounting holes, and the first temperature sensor and the second temperature sensor are respectively inserted into the hot blast stove and the air-swept mill through the two mounting holes.
In some embodiments, the burner tip is a natural gas burner.
In some embodiments, the input of the gas regulating valve is connected to a natural gas reservoir.
In some embodiments, the gas regulating valve is an electric butterfly valve.
The second aspect of the invention provides a control method of a phosphate fertilizer hot blast stove, which comprises the following steps:
the PLC controller acquires the mass m, the inlet temperature T1 and the outlet temperature T2 output by the belt scale, the first temperature sensor and the second temperature sensor in real time;
inputting the mass m as a preposed value, the inlet temperature T1 and the outlet temperature T2 as feedback values into a PID controller, and calculating to obtain the frequency f, the power w, the current I and the opening SZ of the gas regulating valve;
and outputting the frequency f and the power w of the frequency converter to a controlled end of the frequency converter, outputting the opening SZ of the gas regulating valve to the controlled end of the gas regulating valve, and outputting the running current I of the motor to the controlled end of the motor.
In some embodiments, the parameters proportional gain p, integral gain i, and differential gain d are set according to engineering setting methods.
In some embodiments, the water content is obtained by looking up a table according to the difference between the inlet temperature T1 and the outlet temperature T2.
In some embodiments, the method further comprises the steps of: simultaneously detecting whether the frequency converter, the motor and the burner are in the running state or not, if so, entering a temperature control program, and if not, returning to re-detect the running states of the frequency converter, the motor and the burner;
the temperature control program presets a first temperature range and a second temperature range, and simultaneously judges whether the current outlet temperature T2 is in the second temperature range, whether the inlet temperature T1 is in the first temperature range and whether the belt scale mass m is larger than an upper limit value, if so, an alarm signal is generated, and if any parameter of the outlet temperature T2, the inlet temperature T1 or the belt scale mass m does not reach a condition, a correction program is entered.
In some embodiments, the correction procedure includes a first correction procedure, a second correction procedure, a third correction procedure, and a fourth correction procedure;
a first correction procedure: if the current outlet temperature T2 is not in the second temperature range, judging whether the outlet temperature T2 is smaller than the lower limit value of the second temperature range, if yes, continuously judging whether the inlet temperature T1 is smaller than the lower limit value of the first temperature range, if yes, increasing the output flow of the gas regulating valve, synchronously increasing the power w of the air blower and the power w of the frequency converter, and returning to the temperature control program;
a second correction procedure: if the current outlet temperature T2 is not in the second temperature range, judging whether the outlet temperature T2 is greater than the upper limit value of the second temperature range, if yes, continuously judging whether the inlet temperature T1 is greater than the upper limit value of the first temperature range, if yes, reducing the output flow of the gas regulating valve, synchronously reducing the power w of the air blower and the power w of the frequency converter, and returning to the temperature control program;
third correction procedure: if the current outlet temperature T2 is not in the second temperature range, judging whether the outlet temperature T2 is smaller than the lower limit value of the second temperature range, if yes, continuously judging whether the inlet temperature T1 is smaller than the lower limit value of the first temperature range, if not, continuously judging whether the inlet temperature T1 is larger than the upper limit value of the first temperature range, if yes, reducing the output flow of the gas regulating valve, synchronously reducing the power w of the air blower and the power w of the frequency converter, and returning to the temperature control program;
fourth correction procedure: if the current outlet temperature T2 is not in the second temperature range, judging whether the outlet temperature T2 is smaller than the lower limit value of the second temperature range, if yes, continuously judging whether the inlet temperature T1 is smaller than the lower limit value of the first temperature range, if not, continuously judging whether the inlet temperature T1 is larger than the upper limit value of the first temperature range, if not, continuously judging the value of the outlet temperature T2, when the outlet temperature T2 is larger than the upper limit value of the second temperature range, only increasing the output mineral quantity of the conveyor belt according to a preset amplitude, and when the outlet temperature T2 is smaller than the lower limit value of the second temperature range, only reducing the output mineral quantity of the conveyor belt according to the preset amplitude.
The beneficial effects of the invention are as follows: through being provided with first temperature sensor in the export of hot-blast furnace, the export of air brushing mill sets up second temperature sensor, and the temperature value of two sensor outputs is as the feedback value of PID controller, and the belt scale is installed to the bottom of conveyer belt, regard the raw materials quality of belt scale output as the leading value of PID controller for closed loop automatically regulated converter, gas governing valve and motor's operating parameter, both can make the gas fully burn, also can provide the hot air current according to material moisture content matching, make production quality more reliable and more stable.
Drawings
FIG. 1 is a schematic structural diagram of a control device for a phosphate hot blast stove according to an embodiment of the present invention;
FIG. 2 is a flow chart of a temperature control process according to a second embodiment of the present invention;
wherein: the device comprises a 1-hot blast stove, a 2-air sweeping mill, a 3-burner, a 4-first temperature sensor, a 5-air blower, a 6-gas regulating valve, a 7-frequency converter, an 8-conveyor belt, a 9-second temperature sensor, a 10-belt scale, an 11-motor and a 12-PLC controller.
Detailed Description
The present invention will be described in further detail with reference to the drawings and the detailed description below, in order to make the objects, technical solutions and advantages of the present invention more clear and distinct. It is to be understood that the specific embodiments described herein are merely illustrative of the invention and are not limiting thereof. It should be further noted that, for convenience of description, only some, but not all of the matters related to the present invention are shown in the accompanying drawings.
Example 1
The embodiment provides a control device of a phosphate fertilizer hot blast stove, which is shown in fig. 1 and comprises a hot blast stove 1 and an air sweeping mill 2 which are sequentially connected, wherein a burner 3 is arranged in the hot blast stove 1, a first temperature sensor 4 is arranged at an outlet of the hot blast stove 1, an air blower 5 and a gas regulating valve 6 are respectively arranged at an input end of the burner 3, and a controlled end of the air blower 5 is coupled with a control end of a frequency converter 7;
the inlet and the outlet of the air-sweeping mill 2 are respectively provided with a conveyor belt 8 and a second temperature sensor 9, a belt scale 10 is arranged at the bottom of the conveyor belt 8, and a transmission shaft of the air-sweeping mill 2 is coupled with a transmission shaft of a motor 11;
the data output end of the belt scale 10 is coupled with the input end of the PLC 12, the data output ends of the first temperature sensor 4 and the second temperature sensor 9 are coupled with the feedback signal end of the PLC 12, and the controlled ends of the frequency converter 7, the gas regulating valve 6 and the motor 11 are coupled with the control end of the PLC 12.
In this embodiment, through being provided with first temperature sensor 4 in the export of hot-blast furnace 1, the export of air brushing machine 2 sets up second temperature sensor 9, the temperature value of two sensor outputs is as the feedback value of PID controller, belt scale 10 is installed to the bottom of conveyer belt 8, the raw materials quality of belt scale 10 output is as the leading value of PID controller for closed loop automatically regulated converter 7, gas governing valve 6 and motor 11's operating parameter, both can make the gas fully burn, also can provide the hot air current according to the material moisture content matching, make production quality more reliable and stable.
In an alternative embodiment, the outlets of the hot blast stove 1 and the air-swept mill 2 are provided with mounting holes, and the first temperature sensor 4 and the second temperature sensor 9 are respectively inserted into the hot blast stove 1 and the air-swept mill 2 through the two mounting holes.
In an alternative embodiment, the burner tip 3 is a natural gas burner.
In an alternative embodiment, the input of the gas regulating valve 6 is connected to a natural gas reservoir.
In an alternative embodiment, the gas regulating valve 6 is an electric butterfly valve, and the opening degree of the gas regulating valve 6 can be flexibly controlled by the PLC controller 12.
Example two
The embodiment provides a control method for a phosphate hot blast stove, which is used for the control device for the phosphate hot blast stove, and comprises the following steps:
s1, a PLC 12 acquires the mass m, the inlet temperature T1 and the outlet temperature T2 output by a belt scale 10, a first temperature sensor 4 and a second temperature sensor 9 in real time;
s2, taking the mass m as a prepositive value, taking the inlet temperature T1 and the outlet temperature T2 as feedback values, inputting the feedback values into a PID controller, and calculating to obtain the frequency f, the power w, the current I and the opening SZ of the gas regulating valve;
s3, outputting the frequency converter operating frequency f and the frequency converter power w to a controlled end of the frequency converter 7, outputting the opening SZ of the gas regulating valve to a controlled end of the gas regulating valve 6, and outputting the motor operating current I to a controlled end of the motor 11.
In step S2, PID controller parameters, i.e., proportional gain p, integral gain i, and differential gain d, are set according to the engineering setting method. And the water content can be obtained by looking up a table according to the difference between the inlet temperature T1 and the outlet temperature T2.
The specific control program refers to the following steps: detecting whether the frequency converter, the motor and the burner are in the running state at the same time, if so, entering a temperature control program, and if not, returning to re-detect the running states of the frequency converter, the motor and the burner;
the temperature control program presets a first temperature range and a second temperature range, and simultaneously judges whether the current outlet temperature T2 is in the second temperature range, whether the inlet temperature T1 is in the first temperature range and whether the belt scale mass m is larger than an upper limit value, if so, an alarm signal is generated, and if any parameter of the outlet temperature T2, the inlet temperature T1 or the belt scale mass m does not reach the condition, the correction program is entered.
The correction program includes a first correction program, a second correction program, a third correction program, and a fourth correction program;
a first correction procedure: if the current outlet temperature T2 is not in the second temperature range, judging whether the outlet temperature T2 is smaller than the lower limit value of the second temperature range, if yes, continuously judging whether the inlet temperature T1 is smaller than the lower limit value of the first temperature range, if yes, increasing the output flow of the gas regulating valve, synchronously increasing the power w of the air blower and the power w of the frequency converter, and returning to the temperature control program. In the first correction procedure, when the outlet temperature T2 is less than the lower limit value and the inlet temperature T1 is less than the lower limit value, it is indicated that the inlet and outlet temperatures of the air-sweeper 2 do not reach the standard, so that the output flow of the gas regulating valve, the air blower and the power w of the frequency converter are synchronously increased, and the heat input is increased.
A second correction procedure: if the current outlet temperature T2 is not in the second temperature range, judging whether the outlet temperature T2 is larger than the upper limit value of the second temperature range, if so, continuously judging whether the inlet temperature T1 is larger than the upper limit value of the first temperature range, if so, reducing the output flow of the gas regulating valve, synchronously reducing the power w of the air blower and the power w of the frequency converter, and returning to the temperature control program. In the second correction procedure, when the outlet temperature T2 is greater than the lower limit value and the inlet temperature T1 is greater than the lower limit value, it is indicated that the inlet and outlet temperatures of the air-sweeping mill 2 are all over the standard, so that the output flow of the gas regulating valve, the air blower and the power w of the frequency converter are synchronously reduced, and thus the heat input is reduced.
Third correction procedure: if the current outlet temperature T2 is not in the second temperature range, judging whether the outlet temperature T2 is smaller than the lower limit value of the second temperature range, if yes, continuously judging whether the inlet temperature T1 is smaller than the lower limit value of the first temperature range, if not, continuously judging whether the inlet temperature T1 is larger than the upper limit value of the first temperature range, if yes, reducing the output flow of the gas regulating valve, synchronously reducing the power w of the air blower and the frequency converter, and returning to the temperature control program. In the third correction procedure, when the outlet temperature T2 is greater than the lower limit value and the inlet temperature T1 is greater than the upper limit value, it is indicated that although the input heat exceeds the standard, the heat of the air-swept mill 2 is still insufficient to dry the raw ore, and in this case, the outlet temperature T2 should be used as a control reference, so that the output flow of the gas regulating valve, the air blower and the power w of the frequency converter are synchronously increased, thereby increasing the heat input.
Fourth correction procedure: if the current outlet temperature T2 is not in the second temperature range, judging whether the outlet temperature T2 is smaller than the lower limit value of the second temperature range, if yes, continuously judging whether the inlet temperature T1 is smaller than the lower limit value of the first temperature range, if not, continuously judging whether the inlet temperature T1 is larger than the upper limit value of the first temperature range, if not, continuously judging the value of the outlet temperature T2, and when the outlet temperature T2 is larger than the upper limit value of the second temperature range, only increasing the output mineral quantity of the conveyor belt according to a preset amplitude, and when the outlet temperature T2 is smaller than the lower limit value of the second temperature range, only reducing the output mineral quantity of the conveyor belt according to the preset amplitude. In the fourth correction procedure, when it is detected that the inlet temperature T1 is neither greater than the upper limit nor less than the lower limit, it is proved that the temperature is restored to the first temperature range, and at this time, the output flow of the gas regulating valve, the air blower and the power w of the frequency converter should not be adjusted at will, because the heat input is reduced, the inlet temperature T1 does not reach the standard, if the outlet temperature T2 is greater than the upper limit of the second temperature range, it is indicated that there is surplus heat in the air-swept mill 2, the output ore quantity of the conveyor belt should be increased by 0.05kg/s, the surplus heat is consumed by using more raw ore, the temperatures reaching T1 and T2 reach the standard as much as possible, otherwise, the system runs for a long time and consumes a large amount of fuel ineffectively. Otherwise, the output mineral content of the conveyor belt is increased by 0.05kg/s. The core control of the fourth correction procedure aims at setting the stable system parameters within the set range. ,
obviously, the difference between the third correction procedure and the fourth correction procedure is mainly whether the current inlet temperature T1 is still greater than the set value or whether the inlet temperature T1 has been restored to the preset range. If the inlet temperature T1 is still greater than the set value, the output flow of the gas regulating valve, the air blower and the power w of the frequency converter are preferably regulated, and the heat input is reduced to restore the preset range. If the inlet temperature T1 has been restored to the preset range, the heat input of the inlet should be maintained, on the basis of which the outlet temperature T2 is restored to the preset range by adjusting the speed of the conveyor belt.
In addition, since the outlet temperature T2 does not meet the preset conditions of the temperature control process, the above correction process does not include the condition that the outlet temperature T2 meets the preset range.
Wherein, the first temperature range is set to 650±50°, the second temperature range is set to 60±5°, and the specific flow is shown in fig. 2.
After PID closed-loop control, the method has the following advantages:
1. the natural gas quantity is automatically matched with the air quantity, so that the natural gas is combusted more fully, the environmental pollution is avoided, and the fuel consumption is reduced.
2. The hot blast stove provides heat to comprehensively match with ore quantity, water content and the like, so that the water content of the treated raw ore is ensured to be stabilized below 0.5%.
3. And various data are effectively collected and monitored, and data support is provided for production analysis.
The above embodiments are only for illustrating the technical concept and features of the present invention, and are intended to enable those skilled in the art to understand the content of the present invention and implement the same, and are not intended to limit the scope of the present invention. All equivalent changes or modifications made in accordance with the essence of the present invention are intended to be included within the scope of the present invention.
Claims (10)
1. A control device of a phosphate fertilizer hot blast stove is characterized by comprising a hot blast stove and a wind sweeping mill which are connected in sequence,
the hot blast stove is internally provided with a burner, the outlet of the hot blast stove is provided with a first temperature sensor, the input end of the burner is respectively provided with an air blower and a gas regulating valve, and the controlled end of the air blower is coupled with the control end of the frequency converter;
the inlet and the outlet of the air-sweeping mill are respectively provided with a conveyor belt and a second temperature sensor, a belt scale is arranged at the bottom of the conveyor belt, and a transmission shaft of the air-sweeping mill is coupled with a transmission shaft of a motor;
the data output end of the belt scale is coupled with the input end of the PLC, the data output ends of the first temperature sensor and the second temperature sensor are coupled with the feedback signal end of the PLC, and the frequency converter, the gas regulating valve and the controlled end of the motor are coupled with the control end of the PLC.
2. The phosphate fertilizer hot blast stove control device according to claim 1, wherein said hot blast stove and said air cleaner are provided with mounting holes at outlets thereof, and said first temperature sensor and said second temperature sensor are inserted into said hot blast stove and said air cleaner through two of said mounting holes, respectively.
3. The phosphorus hot blast stove control device as claimed in claim 1, wherein said burner is a natural gas burner.
4. The control device for a phosphate hot blast stove according to claim 1, wherein the input end of the gas regulating valve is connected with a natural gas container.
5. The control device for a phosphate hot blast stove according to claim 1, wherein said gas regulating valve is an electric butterfly valve.
6. The control method of the phosphate fertilizer hot blast stove is characterized by comprising the following steps of:
the PLC controller acquires the mass m, the inlet temperature T1 and the outlet temperature T2 output by the belt scale, the first temperature sensor and the second temperature sensor in real time;
inputting the mass m as a preposed value, the inlet temperature T1 and the outlet temperature T2 as feedback values into a PID controller, and calculating to obtain the frequency f, the power w, the current I and the opening SZ of the gas regulating valve;
and outputting the frequency f and the power w of the frequency converter to a controlled end of the frequency converter, outputting the opening SZ of the gas regulating valve to the controlled end of the gas regulating valve, and outputting the running current I of the motor to the controlled end of the motor.
7. The control method of the phosphate hot blast stove according to claim 6, wherein the parameters of the proportional gain p, the integral gain i and the differential gain d are set according to an engineering setting method.
8. The control method of the phosphate hot blast stove according to claim 6, wherein the water content is obtained by looking up a table according to a difference between the inlet temperature T1 and the outlet temperature T2.
9. The control method of a phosphate hot blast stove according to claim 6, further comprising the steps of:
simultaneously detecting whether the frequency converter, the motor and the burner are in the running state or not, if so, entering a temperature control program, and if not, returning to re-detect the running states of the frequency converter, the motor and the burner;
the temperature control program presets a first temperature range and a second temperature range, and simultaneously judges whether the current outlet temperature T2 is in the second temperature range, whether the inlet temperature T1 is in the first temperature range and whether the belt scale mass m is larger than an upper limit value, if so, an alarm signal is generated, and if any parameter of the outlet temperature T2, the inlet temperature T1 or the belt scale mass m does not reach a condition, a correction program is entered.
10. The control method of a phosphate hot blast stove according to claim 9, wherein said correction program comprises a first correction program, a second correction program, a third correction program and a fourth correction program;
a first correction procedure: if the current outlet temperature T2 is not in the second temperature range, judging whether the outlet temperature T2 is smaller than the lower limit value of the second temperature range, if yes, continuously judging whether the inlet temperature T1 is smaller than the lower limit value of the first temperature range, if yes, increasing the output flow of the gas regulating valve, synchronously increasing the power w of the air blower and the power w of the frequency converter, and returning to the temperature control program;
a second correction procedure: if the current outlet temperature T2 is not in the second temperature range, judging whether the outlet temperature T2 is greater than the upper limit value of the second temperature range, if yes, continuously judging whether the inlet temperature T1 is greater than the upper limit value of the first temperature range, if yes, reducing the output flow of the gas regulating valve, synchronously reducing the power w of the air blower and the power w of the frequency converter, and returning to the temperature control program;
third correction procedure: if the current outlet temperature T2 is not in the second temperature range, judging whether the outlet temperature T2 is smaller than the lower limit value of the second temperature range, if yes, continuously judging whether the inlet temperature T1 is smaller than the lower limit value of the first temperature range, if not, continuously judging whether the inlet temperature T1 is larger than the upper limit value of the first temperature range, if yes, reducing the output flow of the gas regulating valve, synchronously reducing the power w of the air blower and the power w of the frequency converter, and returning to the temperature control program;
fourth correction procedure: if the current outlet temperature T2 is not in the second temperature range, judging whether the outlet temperature T2 is smaller than the lower limit value of the second temperature range, if yes, continuously judging whether the inlet temperature T1 is smaller than the lower limit value of the first temperature range, if not, continuously judging whether the inlet temperature T1 is larger than the upper limit value of the first temperature range, if not, continuously judging the value of the outlet temperature T2, when the outlet temperature T2 is larger than the upper limit value of the second temperature range, only increasing the output mineral quantity of the conveyor belt according to a preset amplitude, and when the outlet temperature T2 is smaller than the lower limit value of the second temperature range, only reducing the output mineral quantity of the conveyor belt according to the preset amplitude.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN204417348U (en) * | 2015-02-02 | 2015-06-24 | 河南聚能新型建材有限公司 | There is the phosphogypsum calcination system of pulverizing and functions/drying |
| CN105180632A (en) * | 2015-10-26 | 2015-12-23 | 中联重机股份有限公司 | Drier temperature control method and drier system |
| CN114593603A (en) * | 2022-03-14 | 2022-06-07 | 白兆金 | Waste heat recycling system and control method thereof |
| CN115183570A (en) * | 2022-06-12 | 2022-10-14 | 宝武环科南京资源利用有限公司 | Mineral powder vertical mill system and automatic control method |
| CN116294538A (en) * | 2023-05-23 | 2023-06-23 | 五洲丰农业科技有限公司 | Intelligent low-energy-consumption control method for fertilizer production by comprehensively utilizing flue gas waste heat |
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Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN204417348U (en) * | 2015-02-02 | 2015-06-24 | 河南聚能新型建材有限公司 | There is the phosphogypsum calcination system of pulverizing and functions/drying |
| CN105180632A (en) * | 2015-10-26 | 2015-12-23 | 中联重机股份有限公司 | Drier temperature control method and drier system |
| CN114593603A (en) * | 2022-03-14 | 2022-06-07 | 白兆金 | Waste heat recycling system and control method thereof |
| CN115183570A (en) * | 2022-06-12 | 2022-10-14 | 宝武环科南京资源利用有限公司 | Mineral powder vertical mill system and automatic control method |
| CN116294538A (en) * | 2023-05-23 | 2023-06-23 | 五洲丰农业科技有限公司 | Intelligent low-energy-consumption control method for fertilizer production by comprehensively utilizing flue gas waste heat |
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