CN103032360B - Method and device for controlling desulfuration system - Google Patents
Method and device for controlling desulfuration system Download PDFInfo
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- CN103032360B CN103032360B CN201210579453.5A CN201210579453A CN103032360B CN 103032360 B CN103032360 B CN 103032360B CN 201210579453 A CN201210579453 A CN 201210579453A CN 103032360 B CN103032360 B CN 103032360B
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Abstract
The invention provides a method and device for controlling a desulfuration system. The method is characterized by comprising the following steps of obtaining the air quantity and the pressure at an outlet position of a main draught fan, wherein the pressure at the outlet position is negative pressure; calculating the air quantity at an outlet position of a booster fan in the desulfuration system by utilizing the air quantity and the pressure at the outlet position of the main draught fan, and converting the air quantity at the outlet position of the booster fan into a rotating speed of the booster fan; and calculating the input frequency of a frequency converter by utilizing the rotating speed of the booster fan, transmitting the input frequency to the frequency converter, and thus enabling the frequency converter to control the rotating speed of the booster fan according to the input frequency. According to the method and device disclosed by the embodiment of the invention, the processing capacity of each device of the desulfuration system is controlled in real time through obtaining an actual production situation of a sintering process, and the purpose of saving the energy source and the materials is realized.
Description
Technical field
The present invention relates to control technique field, particularly relate to a kind of controlling method and device of desulphurization system.
Background technique
Before blast furnace ironmaking is produced, need first to carry out sintering to powdery iron-containing raw material.See Fig. 1, show the schematic flow sheet of sintering process, first, in proportioning room 11, the materials such as iron-bearing material, fuel, flux are prepared burden by certain proportioning; Secondly, ferrous material carried out mixing in mixing machine 12, add water, pelletizing; Then, enter sintering machine 13 ignition and become sintering deposit cake; Finally, enter central cooler 14 after sintering deposit cake is carried out breaking process and cool, after screening, qualified sintering deposit is delivered to finished product ore storage bin or blast furnace.
A large amount of sulfur-containing smoke gas can be produced in sintering process, account for greatly 58% of whole iron and steel unit operation ton product discharge amount, if directly this part sulfur-containing smoke gas is discharged in air, great pollution will be caused to environment, therefore, also comprise this link of desulfurization process to sulfur-containing smoke gas in sintering process, only have the flue gas through desulfurization process to be just discharged in air.
As shown in Figure 2, existing desulfurization processing mode is, the exhaust gas and smoke that sintering reaction produces becomes owner of electric cleaner 21 by large flue advanced person, main exhauster 22 is entered again by after main electric cleaner purified treatment, and then enter desulfurizing tower 24 (desulfurization object equipment can be realized equally and also can be scrubber tower, washing machine etc.) via booster fan 23, the sulfur-containing oxide (SO in flue gas
2and SO
3) digested and assimilated by absorbing agent in desulfurizing tower, and after reaching environmental emission standard, be discharged in air by chimney 26.Desulfurizing tower absorbs the desulfurization product that the sulfur-containing oxide in flue gas generates, and can extract reprocessing out by recycle pump 25, injects in addition new digest and assimilate agent by recycle pump in desulfurizing tower.
In original flue gas desulphurization system, what booster fan adopted is constant speed blower fan, and namely booster fan capacity is selected according to design treatment amount.So-called design treatment amount, to refer at the most conservative designing and arranging high-volume, under the design parameter such as maximum sulfide content, maximum air mass flow, the workload (workload of booster fan, the workload of recycle pump, the workload etc. of desulfurizing tower spray-absorption agent can be comprised) of flue gas desulphurization system.Design treatment amount is to ensure that flue gas desulphurization system can reliably under worst condition effectively run.But, it should be noted that, different sintering processes, the sulfur-containing smoke gas amount produced also can be different, if flue gas desulphurization system works according to design treatment amount always, and the sulfur-containing smoke gas amount of the actual generation of sintering process does not reach this design treatment amount far away, booster fan will be made to be in a kind of working state of low-load, this will inevitably cause the waste of mass energy (such as electric energy, heat energy) and material (such as digestive pharmaceutical, water).
Summary of the invention
The embodiment of the present invention provides a kind of controlling method and device of desulphurization system, by air quantity and the pressure of automatic acquisition main exhauster, and adjusts the rotating speed of booster fan accordingly in real time, realizes the object of saving the energy and material.
For this reason, the embodiment of the present invention provides following technological scheme:
A controlling method for desulphurization system, described method comprises:
Obtain air quantity and the pressure in main exhauster outlet port, the pressure in described outlet port is negative pressure;
Utilize the air quantity in the booster fan outlet port in desulphurization system described in the air quantity in described outlet port and calculation of pressure, and the air quantity in described outlet port is converted to the rotating speed of described booster fan;
Utilize the rotating speed of described booster fan to calculate the incoming frequency of frequency variator, and described incoming frequency is sent to described frequency variator, control the rotating speed of described booster fan to make described frequency variator according to described incoming frequency.
Optimize, the air quantity in described acquisition main exhauster outlet port and pressure, specifically comprise:
By being arranged on the air quantity detector in described main exhauster outlet port, obtain the air quantity in described outlet port;
By being arranged on the pressure transducer in described main exhauster outlet port, obtain the pressure in described outlet port.
Optimize, the mode calculating the air quantity in described booster fan outlet port is:
Q
2＝(P
0+P)*Q
1/P
0
Wherein, Q
1represent the air quantity in main exhauster outlet port;
Q
2represent the air quantity in booster fan outlet port;
P represents the pressure in main exhauster outlet port;
P
0represent standard atmospheric pressure.
Optimize, the pressure in described main exhauster outlet port is-200Pa ~-500Pa.
Optimize, the controlling method of described desulphurization system also comprises:
Obtain current sinter doses, and utilize the design sinter doses of described current sinter doses and described desulphurization system, design sulfur-containing smoke gas gauge calculates current sulfur-containing smoke gas amount;
The air quantity in described main exhauster outlet port and described current sulfur-containing smoke gas gauge is utilized to calculate current sulfur-containing smoke gas percentage;
Calculate the ratio of the design sulfur-containing smoke gas percentage of described current sulfur-containing smoke gas percentage and described desulphurization system;
The frequency converter frequency of the recycle pump of described desulphurization system is adjusted according to described ratio, or according to the pharmaceutical quantities that the desulfurizing tower that described ratio adjusts described desulphurization system sprays.
Optimize, the mode calculating described current sulfur-containing smoke gas amount is:
Q
sulphur 1=Q
sulphur 0* M
1/ M
0
Wherein, Q
sulphur 1represent current sulfur-containing smoke gas amount;
Q
sulphur 0represent design sulfur-containing smoke gas amount;
M
1represent current sinter doses;
M
0represent design sinter doses.
Optimize, calculate described current sulfur-containing smoke gas percentage η
sulphur 1mode be:
η
sulphur 1=Q
sulphur 1/ Q
1.
A control gear for desulphurization system, described device comprises:
Main exhauster parameter acquiring unit, for obtaining air quantity and the pressure in main exhauster outlet port, the pressure in described outlet port is negative pressure;
Wind Coverage Calculation unit, for utilizing the air quantity in the booster fan outlet port in desulphurization system described in the air quantity in described outlet port and calculation of pressure, and is converted to the rotating speed of described booster fan by the air quantity in described outlet port;
Frequency computation part unit, for the incoming frequency utilizing the rotating speed of described booster fan to calculate frequency variator, and is sent to described frequency variator by described incoming frequency, controls the rotating speed of described booster fan to make described frequency variator according to described incoming frequency.
Optimize, described main exhauster parameter acquiring unit, specifically comprises:
Be arranged on the air quantity detector in described main exhauster outlet port, for obtaining the air quantity in described outlet port;
Be arranged on the pressure transducer in described main exhauster outlet port, for obtaining the pressure in described outlet port.
Optimize, described Wind Coverage Calculation unit, the mode calculating the air quantity in described booster fan outlet port is:
Q
2＝(P
0+P)*Q
1/P
0
Wherein, Q
1represent the air quantity in main exhauster outlet port;
Q
2represent the air quantity in booster fan outlet port;
P represents the pressure in main exhauster outlet port;
P
0represent standard atmospheric pressure.
Optimize, the control gear of described desulphurization system also comprises:
Sinter doses acquiring unit, for obtaining current sinter doses;
Sulfur-containing smoke gas amount computing unit, for utilizing the design sinter doses of described current sinter doses and described desulphurization system, design sulfur-containing smoke gas gauge calculates current sulfur-containing smoke gas amount;
Sulfur-containing smoke gas percentage calculation unit, calculates current sulfur-containing smoke gas percentage for utilizing the air quantity in described main exhauster outlet port and described current sulfur-containing smoke gas gauge;
Ratio calculation unit, for calculating the ratio of the design sulfur-containing smoke gas percentage of described current sulfur-containing smoke gas percentage and described desulphurization system;
Regulation unit, for adjusting the frequency converter frequency of the recycle pump of described desulphurization system, or according to the pharmaceutical quantities that the desulfurizing tower that described ratio adjusts described desulphurization system sprays according to described ratio.
Optimize, described sulfur-containing smoke gas amount computing unit, the mode calculating described current sulfur-containing smoke gas amount is:
Q
sulphur 1=Q
sulphur 0* M
1/ M
0
Wherein, Q
sulphur 1represent current sulfur-containing smoke gas amount;
Q
sulphur 0represent design sulfur-containing smoke gas amount;
M
1represent current sinter doses;
M
0represent design sinter doses.
Optimize, described sulfur-containing smoke gas percentage calculation unit, calculates described current sulfur-containing smoke gas percentage η
sulphur 1mode be: η
sulphur 1=Q
sulphur 1/ Q
1.
The controlling method of embodiment of the present invention desulphurization system and device, by obtaining the practical condition of sintering process, control the treating capacity of each equipment of desulphurization system in real time, to realize the object of saving the energy and material.On the one hand, by obtaining main exhauster actual air volume in process of production and pressure, the rotating speed of adjustment booster fan; On the other hand, also current sinter doses can be obtained further, and by the sulfur-containing smoke gas amount that the sintering process that sintered material quantitative response goes out produces, the power of adjustment recycle pump or the pharmaceutical quantities of desulfurizing tower spray.
Accompanying drawing explanation
In order to be illustrated more clearly in the embodiment of the present application or technological scheme of the prior art, be briefly described to the accompanying drawing used required in embodiment or description of the prior art below, apparently, the accompanying drawing that the following describes is only some embodiments recorded in the application, for those of ordinary skill in the art, other accompanying drawing can also be obtained according to these accompanying drawings.
Fig. 1 is the schematic flow sheet of sintering process;
Fig. 2 is the structural representation of desulphurization system;
Fig. 3 is the flow chart of the controlling method embodiment 1 of embodiment of the present invention desulphurization system;
Fig. 4 is the flow chart of the controlling method embodiment 2 of embodiment of the present invention desulphurization system;
Fig. 5 is the formation schematic diagram of the control gear embodiment 1 of embodiment of the present invention desulphurization system;
Fig. 6 is the formation schematic diagram of the control gear embodiment 2 of embodiment of the present invention desulphurization system.
Embodiment
In order to make those skilled in the art person understand the present invention program better, below in conjunction with drawings and embodiments, the embodiment of the present invention is described in further detail.
Embodiment one
As shown in Figure 3, show the flow chart of the controlling method embodiment 1 of embodiment of the present invention desulphurization system, comprising:
Step 101, obtain air quantity and the pressure in main exhauster outlet port, the pressure in described outlet port is negative pressure.
As shown in Figure 2, sinter fume is laggard to main exhauster 22 through the dust removal process of main electric cleaner 21, in order to ensure the air suction efficiency of main exhauster 22, needing to arrange a booster fan 23 in main exhauster outlet port, carrying out supercharging by the flue gas of booster fan 23 pairs of desulphurization systems.This mainly because, in the flow process of flue gas, drag effect due to equipment can make flue gas lose a part of pressure, along with the increase of equipment resistance, the outlet port of main exhauster just may form larger malleation, this will affect the exhausting effect of main exhauster, and then also may have influence on the normal operation of sintering system.For this reason, be provided with booster fan in main exhauster outlet port, make the outlet port of main exhauster remain at micro-vacuum state (pressure such as maintaining main exhauster outlet port is-200Pa).
As shown in the above, be not isolate to exist between booster fan and main exhauster, condition each other therebetween and interact, normally carrying out of common guarantee sintering process.But, in prior art but and underuse the two relation, but simply make booster fan be operated in design treatment amount under, namely control booster fan and farthest pressurized treatment is carried out to the flue gas of desulphurization system, this waste that must not cause the energy and material in conjunction with the design of actual sintered PRODUCTION STATUS.
The embodiment of the present invention has just fully taken into account the relation between main exhauster and booster fan, the runnability of automatic monitoring main exhauster, and adjusts the working condition of booster fan in real time according to the runnability of main exhauster, realizes the object of saving the energy and material.
Particularly, namely this step is the step of automatic acquisition main exhauster runnability, comprises the air quantity and pressure two parameters that obtain main exhauster outlet port.Wherein, the air quantity in main exhauster outlet port can be obtained by the air quantity detector being arranged on described main exhauster outlet port; The pressure in main exhausting outlet port can be obtained by the pressure transducer being arranged on described main exhauster outlet port.
It should be noted that, in the technological scheme that the embodiment of the present invention provides, main exhauster can adopt conversion system to operate.
Step 102, utilizes the air quantity in the booster fan outlet port in desulphurization system described in the air quantity in described outlet port and calculation of pressure, and the air quantity in described outlet port is converted to the rotating speed of described booster fan.
Two running parameters of main exhauster are monitored in step 101, after obtaining the current working state of main exhauster, this step then needs the working state determining the booster fan that the working state current with main exhauster matches, and mainly comprises two process actions: one is the air quantity according to current the needs output of two running parameter determination booster fans of main exhauster; Two is according to the current rotating speed needing the air quantity determination booster fan exported, and namely determines that booster fan could export the air quantity of current needs under great rotating speed.
In fact, no matter be air quantity or the rotating speed of booster fan of booster fan output, the two is all one embodiments of booster fan current operating state, and the angle only embodied is different.The air quantity in booster fan outlet port considers from the angle of result, if the working state current with main exhauster matches, it is micro-vacuum state that booster fan needs to export great air quantity guarantee main exhauster outlet port; And the air quantity of booster fan is converted to rotating speed, being then from controlling and the angle of actual motion, realizing mating of main exhauster and booster fan working state.
Method for the air quantity calculating booster fan outlet port can be summarized as follows:
Restrained from A Fojiade Luoding: pV=nRT; Wherein, p represents pressure, and V represents gas volume, and n represents amount of substance, and T represents kelvin temperature, and R represents gas constant, and 3/ mole, R=8.31 handkerchief rice is opened; Therefore, when n is constant, pV/T=nR=constant.
Then, main exhauster outlet port and booster fan outlet port have following relation: p
1q
1/ T
1=p
2q
2/ T
2; Wherein, p
1represent that the gas pressure in main exhauster outlet port (needs to consider atmospheric pressure P
0with the outlet pressure P of main exhauster, i.e. p
1=P
0+ P, wherein the scope of P is-200Pa ~-500Pa, P
0for standard atmospheric pressure); Q
1represent the air quantity in main exhauster outlet port; T
1represent the temperature in main exhauster outlet port; p
2representing the gas pressure in booster fan outlet port, is standard atmospheric pressure P
0; Q
2represent the air quantity in booster fan outlet port.
Again because the temperature variation in main exhauster inlet and booster fan outlet port is less, can ignore to this.Therefore, p
1q
1=p
2q
2, i.e. (P
0+ P) * Q
1=p
0* Q
2, the Wind Coverage Calculation formula so far just obtaining booster fan outlet port is:
Q
2＝(P
0+P)*Q
1/P
0
Method for the rotating speed of convertor turbocharge blower fan can be summarized as follows:
In different time sections, the air quantity of booster fan and square proportional change, the i.e. Q of rotating speed
a/ Q
b=(n
a/ n
b)
2, when knowing air quantity and the rotating speed of booster fan in section sometime, just can by the outlet port air quantity Q of booster fan
2be converted to rotating speed n
2.
Step 103, utilizes the rotating speed of described booster fan to calculate the incoming frequency of frequency variator, and described incoming frequency is sent to described frequency variator, control the rotating speed of described booster fan to make described frequency variator according to described incoming frequency.
By motor n
s=60f
1/ p (n
ssynchronous speed, f
1ac power frequency, p number of pole-pairs) and N
a/ N
b=(n
a/ n
b)
3known, the running state of booster fan is directly controlled by the incoming frequency of frequency variator, therefore, to make booster fan according to rotating speed n
2running, also needs to calculate further to know and rotating speed n
2the incoming frequency of the frequency variator matched; And then the incoming frequency calculated is sent to frequency variator, frequency variator is worked under the control of this incoming frequency.Like this, frequency variator just can control booster fan according to rotating speed n
2running, thus make booster fan export the air quantity Q matched with main exhauster current operating state
2, realize the object adjusting booster fan working condition according to the working condition of main exhauster in real time, booster fan no longer adopts constant speed mode to operate, and just can stop the waste that booster fan overpressurization causes energy, achieves the object of saving the energy.
Embodiment two
As shown in Figure 4, show the flow chart of the controlling method embodiment 2 of embodiment of the present invention desulphurization system, described method also comprises:
Step 201, obtains current sinter doses, and utilize the design sinter doses of described current sinter doses and described desulphurization system, design sulfur-containing smoke gas gauge calculates current sulfur-containing smoke gas amount.
In order to realize the object of saving the energy further, the sulfur-containing smoke gas situation that the embodiment of the present invention also can produce according to sintering process adjusts the working state of recycle pump or desulfurizing tower in desulphurization system in real time.
The sulfur-containing smoke gas amount that sintering process produces and sinter doses have close relationship, can think that the two is directly proportional, sinter doses is larger, the sulfur-containing smoke gas amount then produced is also more, therefore, based on this relation between sulfur-containing smoke gas amount and sinter doses, can know by the mode obtaining sinter doses the sulfur-containing smoke gas amount that this sintering process produces.
Particularly, the mode calculating described current sulfur-containing smoke gas amount is:
Q
sulphur 1=Q
sulphur 0* M
1/ M
0
Wherein, Q
sulphur 1represent current sulfur-containing smoke gas amount; M
1represent current sinter doses; Q
sulphur 0represent design sulfur-containing smoke gas amount; M
0represent design sinter doses.
It should be noted that, the sinter doses in the embodiment of the present invention, refers to the inventory mixed according to a certain ratio materials such as iron-bearing material, fuel, flux in proportioning room.
Step 202, utilizes the air quantity in described main exhauster outlet port and described current sulfur-containing smoke gas gauge to calculate current sulfur-containing smoke gas percentage.
Because the dosage of desulfurizing tower spray-absorption agent is except relevant with the total amount of sulfur-containing smoke gas, also shared in sinter fume with sulfur-containing smoke gas content is relevant, the sulfur-containing smoke gas contained in sinter fume is more, the pharmaceutical quantities then sprayed is larger, the desulfurization product reacting generation in desulfurizing tower is also more, the desulfurization product correspondingly needing recycle pump to extract out from desulfurizing tower and the absorbing agent of injection more.Therefore, in order to realize the Reasonable adjustment of recycle pump or desulfurizing tower working state, except will knowing the sulfur-containing smoke gas amount of this sintering deposit generation, the percentage composition that sulfur-containing smoke gas is shared in the sinter fume of per unit volume also to be known.
Particularly, the mode calculating described current sulfur-containing smoke gas percentage is:
η
sulphur 1=Q
sulphur 1/ Q
1.
Wherein, η
sulphur 1represent current sulfur-containing smoke gas percentage; Q
sulphur 1represent current sulfur-containing smoke gas amount; Q
1represent the air quantity in main exhauster outlet port.
Step 203, calculates the ratio of the design sulfur-containing smoke gas percentage of described current sulfur-containing smoke gas percentage and described desulphurization system.
Different from adjusting booster fan working state in the embodiment of the present invention, carry out based on the design treatment amount of the two to the adjustment of recycle pump or desulfurizing tower working state, that is, each adjustment is not with the result of adjustment last time for benchmark carries out raising or lowering, but each adjustment all will with design treatment amount for benchmark be lowered.
This step calculates the ratio between current sulfur-containing smoke gas percentage and design sulfur-containing smoke gas percent, exactly in order to determine adjusting range, thus provides certain Data support for adjustment recycle pump or the working state of desulfurizing tower.
Step 204, adjusts the power of the recycle pump of described desulphurization system according to described ratio, or according to the pharmaceutical quantities that the desulfurizing tower that described ratio adjusts described desulphurization system sprays.
This step be namely utilize step 203 to determine amplitude to adjust the process of recycle pump or desulfurizing tower working state.If it is 50% (namely adjusting range is 50%) that step 203 calculates the ratio determined, the power that this step then adjusts recycle pump is 50% of design power, or the pharmaceutical quantities of adjustment desulfurizing tower spray is 50% of designer drug dosage.If the ratio that step 203 is determined is 75%, then the power after recycle pump adjustment is 75% of design power, or the pharmaceutical quantities of desulfurizing tower spray is 75% of designer drug dosage.Certainly, recycle pump and desulfurizing tower is the highest also can only work under design treatment amount, can not adjust to the two and exceed design treatment amount.
Like this, main electric cleaner is entered by large flue at sinter fume, main exhauster is entered again after udst separation process, and then enter in the process of desulfurization in desulfurizing tower via booster fan, on the one hand, automatically the working state (comprising outlet port air quantity and pressure) of main exhauster can be monitored, and (mainly adjust the rotating speed of booster fan with this working state adjusting booster fan, change the discharge quantity of fan of booster fan thus), thus reduce the energy of booster fan overpressurization waste, realize the object of saving the energy; On the other hand, the working state (mainly referring to the pharmaceutical quantities of the power of adjustment recycle pump, desulfurizing tower spray) of recycle pump or desulfurizing tower can also be adjusted by the air quantity in main exhauster outlet port and sinter doses, make recycle pump or desulfurizing tower according to the treating capacity work adapted with sintering situation, the energy can not only be saved further, the waste of the materials such as absorbing agent can also be avoided, improve desulphurization efficiency.
Embodiment three
As shown in Figure 5, show the schematic diagram of the control gear embodiment 1 of embodiment of the present invention desulphurization system, described device comprises:
Main exhauster parameter acquiring unit 301, for obtaining air quantity and the pressure in main exhauster outlet port, the pressure in described outlet port is negative pressure.
Further, described main exhauster parameter acquiring unit, specifically comprises:
Be arranged on the air quantity detector in described main exhauster outlet port, for obtaining the air quantity in described outlet port;
Be arranged on the pressure transducer in described main exhauster outlet port, for obtaining the pressure in described outlet port.
Wind Coverage Calculation unit 302, for utilizing the air quantity in the booster fan outlet port in desulphurization system described in the air quantity in described outlet port and calculation of pressure, and is converted to the rotating speed of described booster fan by the air quantity in described outlet port;
Particularly, the mode calculating the air quantity in described booster fan outlet port is:
Q
2＝(P
0–P)*Q
1/P
0
Wherein, Q
1represent the air quantity in main exhauster outlet port;
Q
2represent the air quantity in booster fan outlet port;
P represents the pressure in main exhauster outlet port;
P
0represent standard atmospheric pressure.
In addition, in different time sections, the air quantity of booster fan and square proportional change, the i.e. Q of rotating speed
a/ Q
b=(n
a/ n
b)
2, therefore, can accordingly by the outlet port air quantity Q of booster fan
2be converted to rotating speed n
2.
Frequency computation part unit 303, for the incoming frequency utilizing the rotating speed of described booster fan to calculate frequency variator, and is sent to described frequency variator by described incoming frequency, controls the rotating speed of described booster fan to make described frequency variator according to described incoming frequency.
In different time sections, the incoming frequency of frequency variator and cube proportional change, the i.e. N of booster fan rotating speed
a/ N
b=(n
a/ n
b)
3, therefore, the rotating speed n of booster fan can be utilized
2calculate the incoming frequency obtaining the frequency variator matched.
Like this, at frequency variator according to when calculating the incoming frequency work obtained, booster fan just can be made according to according to rotating speed n
2running, thus produce the air quantity Q matched with main exhauster current operating state
2, realize the object adjusting booster fan working condition according to the working condition of main exhauster in real time, booster fan no longer adopts constant speed mode to operate, and just can stop the waste that booster fan overpressurization causes energy, achieves the object of saving the energy.
Embodiment four
As shown in Figure 6, show the flow chart of the control gear embodiment 2 of embodiment of the present invention desulphurization system, described device also comprises:
Sinter doses acquiring unit 401, for obtaining current sinter doses.
Sulfur-containing smoke gas amount computing unit 402, for utilizing the design sinter doses of described current sinter doses and described desulphurization system, design sulfur-containing smoke gas gauge calculates current sulfur-containing smoke gas amount;
Particularly, the mode calculating described current sulfur-containing smoke gas amount is:
Q
sulphur 1=Q
sulphur 0* M
1/ M
0
Wherein, Q
sulphur 1represent current sulfur-containing smoke gas amount;
Q
sulphur 0represent design sulfur-containing smoke gas amount;
M
1represent current sinter doses;
M
0represent design sinter doses.
Sulfur-containing smoke gas percentage calculation unit 403, calculates current sulfur-containing smoke gas percentage for utilizing the air quantity in described main exhauster outlet port and described current sulfur-containing smoke gas gauge;
Particularly, described current sulfur-containing smoke gas percentage η is calculated
sulphur 1mode be: η
sulphur 1=Q
sulphur 1/ Q
1.
Ratio calculation unit 404, for calculating the ratio of the design sulfur-containing smoke gas percentage of described current sulfur-containing smoke gas percentage and described desulphurization system.
Regulation unit 405, for adjusting the power of the recycle pump of described desulphurization system, or according to the pharmaceutical quantities that the desulfurizing tower that described ratio adjusts described desulphurization system sprays according to described ratio.
The power of ratio adjustment recycle pump determined according to ratio calculation unit or the pharmaceutical quantities of desulfurizing tower spray, the two working state and sintering process are matched, the energy can not only be saved further, the waste of the materials such as absorbing agent can also be avoided, improve desulphurization efficiency.
The present invention program can describe in the general context of computer executable instructions, such as program unit.Usually, program unit comprises the routine, program, object, assembly, data structure etc. that perform particular task or realize particular abstract data type.Also can put into practice the present invention program in a distributed computing environment, in these DCEs, be executed the task by the remote processing devices be connected by communication network.In a distributed computing environment, program unit can be arranged in the local and remote computer-readable storage medium comprising memory device.
Each embodiment in this specification all adopts the mode of going forward one by one to describe, between each embodiment identical similar part mutually see, what each embodiment stressed is the difference with other embodiments.Especially, for device embodiment, because it is substantially similar to embodiment of the method, so describe fairly simple, relevant part illustrates see the part of embodiment of the method.Device embodiment described above is only schematic, the wherein said unit illustrated as separating component or can may not be and physically separates, parts as unit display can be or may not be physical location, namely can be positioned at a place, or also can be distributed on multiple NE.Some or all of module wherein can be selected according to the actual needs to realize the object of the present embodiment scheme.Those of ordinary skill in the art, when not paying creative work, are namely appreciated that and implement.
Being described in detail the embodiment of the present invention above, applying embodiment herein to invention has been elaboration, the explanation of above embodiment just understands method and apparatus of the present invention for helping; Meanwhile, for one of ordinary skill in the art, according to thought of the present invention, all will change in specific embodiments and applications, in sum, this description should not be construed as limitation of the present invention.
Claims (13)
1. a controlling method for desulphurization system, is characterized in that, described method comprises:
Obtain air quantity and the pressure in main exhauster outlet port, the pressure in described main exhauster outlet port is negative pressure;
Utilize the air quantity in the booster fan outlet port in desulphurization system described in the air quantity in described main exhauster outlet port and calculation of pressure, and the air quantity in described booster fan outlet port is converted to the rotating speed of described booster fan;
Utilize the rotating speed of described booster fan to calculate the incoming frequency of frequency variator, and described incoming frequency is sent to described frequency variator, control the rotating speed of described booster fan to make described frequency variator according to described incoming frequency.
2. method according to claim 1, is characterized in that, the air quantity in described acquisition main exhauster outlet port and pressure, specifically comprise:
The air quantity in described main exhauster outlet port is obtained by the air quantity detector being arranged on described main exhauster outlet port;
The pressure in described main exhauster outlet port is obtained by the pressure transducer being arranged on described main exhauster outlet port.
3. method according to claim 2, is characterized in that, the mode calculating the air quantity in described booster fan outlet port is:
Q
2＝(P
0+P)*Q
1/P
0
Wherein, Q
1represent the air quantity in main exhauster outlet port;
Q
2represent the air quantity in booster fan outlet port;
P represents the pressure in main exhauster outlet port;
P
0represent standard atmospheric pressure.
4. the method according to any one of claim 1-3, is characterized in that, the pressure in described main exhauster outlet port is-200Pa ~-500Pa.
5. the method according to any one of claim 1-3, is characterized in that, described method also comprises:
Obtain current sinter doses, and utilize the design sinter doses of described current sinter doses and described desulphurization system, design sulfur-containing smoke gas gauge calculates current sulfur-containing smoke gas amount;
The air quantity in described main exhauster outlet port and described current sulfur-containing smoke gas gauge is utilized to calculate current sulfur-containing smoke gas percentage;
Calculate the ratio of the design sulfur-containing smoke gas percentage of described current sulfur-containing smoke gas percentage and described desulphurization system;
The frequency converter frequency of the recycle pump of described desulphurization system is adjusted according to described ratio, or according to the pharmaceutical quantities that the desulfurizing tower that described ratio adjusts described desulphurization system sprays.
6. method according to claim 5, is characterized in that, the mode calculating described current sulfur-containing smoke gas amount is:
Q
sulphur 1=Q
sulphur 0* M
1/ M
0
Wherein, Q
sulphur 1represent current sulfur-containing smoke gas amount;
Q
sulphur 0represent design sulfur-containing smoke gas amount;
M
1represent current sinter doses;
M
0represent design sinter doses.
7. method according to claim 5, is characterized in that, calculates described current sulfur-containing smoke gas percentage η
sulphur 1mode be:
η
sulphur 1=Q
sulphur 1/ Q
1;
Wherein, Q
sulphur 1represent current sulfur-containing smoke gas amount; Q
1represent the air quantity in main exhauster outlet port.
8. a control gear for desulphurization system, is characterized in that, described device comprises:
Main exhauster parameter acquiring unit, for obtaining air quantity and the pressure in main exhauster outlet port, the pressure in described main exhauster outlet port is negative pressure;
Wind Coverage Calculation unit, for utilizing the air quantity in the booster fan outlet port in desulphurization system described in the air quantity in described main exhauster outlet port and calculation of pressure, and is converted to the rotating speed of described booster fan by the air quantity in described booster fan outlet port;
Frequency computation part unit, for the incoming frequency utilizing the rotating speed of described booster fan to calculate frequency variator, and is sent to described frequency variator by described incoming frequency, controls the rotating speed of described booster fan to make described frequency variator according to described incoming frequency.
9. device according to claim 8, is characterized in that, described main exhauster parameter acquiring unit, specifically comprises:
Be arranged on the air quantity detector in described main exhauster outlet port, for obtaining the air quantity in described main exhauster outlet port;
Be arranged on the pressure transducer in described main exhauster outlet port, for obtaining the pressure in described main exhauster outlet port.
10. device according to claim 9, is characterized in that, described Wind Coverage Calculation unit, and the mode calculating the air quantity in described booster fan outlet port is:
Q
2＝(P
0+P)*Q
1/P
0
Wherein, Q
1represent the air quantity in main exhauster outlet port;
Q
2represent the air quantity in booster fan outlet port;
P represents the pressure in main exhauster outlet port;
P
0represent standard atmospheric pressure.
11. devices according to Claim 8 described in-10 any one, it is characterized in that, described device also comprises:
Sinter doses acquiring unit, for obtaining current sinter doses;
Sulfur-containing smoke gas amount computing unit, for utilizing the design sinter doses of described current sinter doses and described desulphurization system, design sulfur-containing smoke gas gauge calculates current sulfur-containing smoke gas amount;
Sulfur-containing smoke gas percentage calculation unit, calculates current sulfur-containing smoke gas percentage for utilizing the air quantity in described main exhauster outlet port and described current sulfur-containing smoke gas gauge;
Ratio calculation unit, for calculating the ratio of the design sulfur-containing smoke gas percentage of described current sulfur-containing smoke gas percentage and described desulphurization system;
Regulation unit, for adjusting the frequency converter frequency of the recycle pump of described desulphurization system, or according to the pharmaceutical quantities that the desulfurizing tower that described ratio adjusts described desulphurization system sprays according to described ratio.
12. devices according to claim 11, is characterized in that, described sulfur-containing smoke gas amount computing unit, and the mode calculating described current sulfur-containing smoke gas amount is:
Q
sulphur 1=Q
sulphur 0* M
1/ M
0
Wherein, Q
sulphur 1represent current sulfur-containing smoke gas amount;
Q
sulphur 0represent design sulfur-containing smoke gas amount;
M
1represent current sinter doses;
M
0represent design sinter doses.
13. devices according to claim 11, is characterized in that, described sulfur-containing smoke gas percentage calculation unit, calculate described current sulfur-containing smoke gas percentage η
sulphur 1mode be:
η
sulphur 1=Q
sulphur 1/ Q
1;
Wherein, Q
sulphur 1represent current sulfur-containing smoke gas amount; Q
1represent the air quantity in main exhauster outlet port.
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| CN201210579453.5A CN103032360B (en) | 2012-12-27 | 2012-12-27 | Method and device for controlling desulfuration system |
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| CN103900101B (en) * | 2014-03-21 | 2016-02-24 | 广东电网公司电力科学研究院 | Based on pressure regulation method and the system of air and flue system |
| CN107694300B (en) * | 2016-08-08 | 2020-01-17 | 中冶长天国际工程有限责任公司 | Ammonia spraying amount control method and device of activated carbon desulfurization and denitrification system |
| CN110345098A (en) * | 2019-06-20 | 2019-10-18 | 华润水泥（龙岩曹溪）有限公司 | Kiln head exhaust fan air quantity Automatic adjustment method, device, system, equipment and medium |
| CN110500310A (en) * | 2019-08-30 | 2019-11-26 | 中冶北方（大连）工程技术有限公司 | Main exhauster matches automatic control device and method with booster fan |
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Effective date of registration: 20170801 Address after: 410205 No. 180, Lu Song Road, hi tech Zone, Hunan, Changsha Co-patentee after: Hunan Changtian Automatic Control Engineering Co., Ltd. Patentee after: China to long days International Engineering Co., Ltd. Address before: 410007 Changsha City, Hunan province labor Road No. 1 Patentee before: ZhongYe Changtian International Engineering Co., Ltd. |