CN103961990B - A kind of flue gas repeatedly aeration system for desulfuration and denitration and control method - Google Patents
A kind of flue gas repeatedly aeration system for desulfuration and denitration and control method Download PDFInfo
- Publication number
- CN103961990B CN103961990B CN201410175336.1A CN201410175336A CN103961990B CN 103961990 B CN103961990 B CN 103961990B CN 201410175336 A CN201410175336 A CN 201410175336A CN 103961990 B CN103961990 B CN 103961990B
- Authority
- CN
- China
- Prior art keywords
- aeration tank
- aeration
- flue
- liquid
- control signal
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Abstract
The invention discloses a kind of flue gas repeatedly aeration system for desulfuration and denitration, it comprises: tower body, stoste pond, recovery pond, exhaust gases passes, chimney, monitoring device, actuating unit and operation control device and two aeration spaces, each aeration space includes an aeration tank and spraying rack.The invention also discloses the fuzzy control method of a kind of flue gas repeatedly aeration system for desulfuration and denitration, it comprises the following steps: step 1, generate fuzzy control model rule list; The liquid level of step 2, regulable control aeration tank neutral and alkali waste water; The discharge of step 3, regulable control spray channels.Alkaline waste water is utilized to reduce the cost of flue gas desulfurization and denitrification in the past to flue gas desulfurization and denitrification process.
Description
Technical field
The present invention relates to treatment technology and the automation field of fire coal boiler fume, in particular a kind of flue gas repeatedly aeration system for desulfuration and denitration and fuzzy control method.
Background technology
The primary combustion thing of Mei Shi China thermal power generation, the oxysulfide produced in coal burning process, nitrogen oxide cause day by day serious harm to China's atmospheric environment.The fume desulphurization method of usual employing is lime/lime stone-gypsum wet, and the method efficiency comparison is high.But the domestic research to this technology of China not yet has breakthrough, this system is mainly main from Japanese import at present, the medium small boiler business burden of China 70% not a large amount of capital expenditure of conventional sulfur removal technology and high operating cost at present.In addition, formed containing the low-grade gypsum of a large amount of impurity after lime/lime stone-gypsum wet desulfurization, most of desulfurization product is abandoned process, causes secondary pollution to environment.Meanwhile, the enterprises such as China's printing and dyeing, papermaking, process hides, chemical industry discharge a large amount of alkaline waste water every year, such as, the discharge capacity total amount of textile printing and dyeing wastewater in 2007 is up to 22.5 hundred million tons, the alkaline waste water of middle-size and small-size papermaking enterprise discharge about has more than 10 hundred million tons, and alkaline waste water needs that process is up to standard just can discharge afterwards.Physico-chemical process at present for the treatment of alkaline sewage mainly contains acid-base neutralization method, flocculence, chemical precipitation method and crystallisation.Traditional physics, chemical method process alkaline sewage are fruitful.But because the discharge capacity of alkaline sewage is too large, traditionally many retort and storage tank are wanted in process, and at substantial reagent, equipment investment and producing cost are all very large.High processing cost in the face of flue gas and alkaline waste liquor is a large technical barrier of present enterprise, and therefore, prior art has yet to be improved and developed, and seeks flue gas and alkaline waste liquor low-cost processes technology
Summary of the invention
An object of the present invention is to provide a kind of flue gas repeatedly aeration system for desulfuration and denitration, be the chemical reaction utilizing alkaline waste water and flue gas, remove nitrogen oxide and the sulfur oxide pollutant of high-valence state in flue gas, and alkaline waste water pH value is lowered, be intended to solve existing flue gas desulfurization and denitrification and the high problem of alkaline waste water processing cost.
For realizing above object, the technical scheme that this invention takes is:
A kind of flue gas repeatedly aeration system for desulfuration and denitration, it comprises:
Tower body, the short transverse along this tower body in described tower body is provided with lower aeration space and upper aeration space from the bottom to top successively; The bottom of described lower aeration space and upper aeration space is respectively equipped with the first aeration tank for splendid attire denitration alkaline waste water to be desulfurization and the second aeration tank, described first aeration tank is provided with the first water inlet, the first delivery port, this the first aeration tank bottom and be provided with the first flue collector, described second aeration tank is provided with the second water inlet, the second delivery port, this second aeration tank bottom and be provided with the second flue collector; The upside of described first aeration tank and the second aeration tank is separately installed with one for spraying the first spraying rack and second spraying rack of alkaline waste water in the aeration tank of correspondence; Described first spraying rack is connected with one first spray channels, and described first water inlet is connected with one first intake tunnel, and described second spraying rack is connected with one second spray channels, and described second water inlet is connected with one second intake tunnel;
Stoste pond, described stoste pond is connected with the second intake tunnel and the second spray channels respectively by transfer passage, for being respectively the second aeration tank and the second spraying rack provides alkaline waste water;
Recovery pond, described recovery pond is connected with the first delivery port by one first exhalant canal;
Described second delivery port is connected with the first intake tunnel and the first spray channels respectively by the second exhalant canal, for being respectively the first aeration tank and the first spraying rack provides alkaline waste water;
Described first flue collector is connected for the first fume inlet passage inputting flue gas in this first flue collector with one, the top of described lower aeration space is provided with outlet flue, described second flue collector is connected with one second fume inlet passage, described outlet flue is connected with the second fume inlet passage by a smoke-outlet flue, for inputting flue gas in the second flue collector;
Chimney, described chimney is connected with the top of tower body, for discharging the waste gas after end reaction;
Monitoring device, described monitoring device comprises aeration tank liquid monitoring device and flow monitoring device;
Wherein, described aeration tank liquid monitoring device comprises: for the first ultrasonic level gage of the liquid level and temperature of monitoring the first aeration tank neutral and alkali waste water respectively and the first infrared temperature sensor, for the second ultrasonic level gage of the liquid level and temperature of monitoring the second aeration tank neutral and alkali waste water respectively and the second infrared temperature sensor and the first pH value sensor of pH value and the second pH value sensor that are respectively used to the first aeration tank and the second aeration tank neutral and alkali waste water; Described first ultrasonic level gage and the first infrared temperature sensor are all installed on the tower body inwall between the first spraying rack and the first aeration tank, second ultrasonic level gage and the second infrared temperature sensor are installed on the tower body inwall between the second spraying rack and the second aeration tank, and described first pH value sensor and the second pH value sensor are installed in the first aeration tank and the second aeration tank respectively;
Described flow monitoring device comprises the first liquid flowmeter be installed on the second spray channels, the second liquid flowmeter be installed on the second intake tunnel, the 3rd fluid flowmeter be installed on the first spray channels, the first gas flowmeter be installed on smoke-outlet flue, the second gas flowmeter of being installed on the 4th fluid flowmeter on the first exhalant canal and being installed on the first fume inlet passage;
Actuating unit, described actuating unit comprises: be installed on the first driven opening bottom valve on the second spray channels, the second intake tunnel, the first spray channels, the first intake tunnel and the first exhalant canal, the second driven opening bottom valve, the 3rd driven opening bottom valve, the 4th driven opening bottom valve and the 5th driven opening bottom valve respectively; Described actuating unit comprises the variable frequency pump be installed on transfer passage further;
Operation control device, described operation control device is used for the Monitoring Data according to monitoring device, carries out fuzzy control to actuating unit.
Be provided with multiple first point of flue be connected with the first flue collector in described first flue collector, described first point of flue is provided with multiple the first intercommunicating pore be connected with the first aeration tank; Be provided with multiple second point of flue be connected with the second flue collector in described second flue collector, described second point of flue is provided with multiple the second intercommunicating pore be connected with the second aeration tank.
In described second fume inlet passage, a check valve is installed, to prevent in the gas backstreaming in the second flue collector to lower aeration space.
Described operation control device is PLC.
Another object of the present invention is to provide adopt flue gas repeatedly aeration system for desulfuration and denitration carry out the method for fuzzy control, be the chemical reaction utilizing alkaline waste water and flue gas, remove nitrogen oxide and the sulfur oxide pollutant of high-valence state in flue gas, and alkaline waste water pH value is lowered, be intended to solve existing flue gas desulfurization and denitrification and the high problem of alkaline waste water processing cost.
For realizing above object, the technical scheme that this invention takes is:
Adopt above-mentioned flue gas repeatedly aeration system for desulfuration and denitration carry out a method for fuzzy control, it comprises the following steps:
Step 1, generation fuzzy control model rule list, described fuzzy control model rule list comprises liquid level specified rate defuzzification and spray rate specified rate defuzzification;
Step 2, to combine with the Monitoring Data of the first ultrasonic level gage according to the liquid height specified rate of liquid level specified rate defuzzification, after obtaining best PID regulable control parameter by fuzzy reasoning, export one first control signal, this first control signal is used for the liquid level of regulable control first aeration tank neutral and alkali waste water; Liquid height specified rate according to liquid level specified rate defuzzification combines with the Monitoring Data of the second ultrasonic level gage, after obtaining best PID regulable control parameter by fuzzy reasoning, export one second control signal, this second control signal is used for the liquid level of regulable control second aeration tank neutral and alkali waste water;
Step 3, to combine with the Monitoring Data of the 3rd fluid flowmeter according to the spray rate specified rate of spray rate specified rate defuzzification, after obtaining best PID regulable control parameter by fuzzy reasoning, export one the 3rd control signal, the 3rd control signal is used for the discharge of regulable control first spray channels; Spray rate specified rate according to spray rate specified rate defuzzification combines with the Monitoring Data of first liquid flowmeter, after obtaining best PID regulable control parameter by fuzzy reasoning, export one the 4th control signal, the 4th control signal is used for the discharge of regulable control second spray channels.
The control method of the liquid level of the first aeration tank neutral and alkali waste water is comprise following one or more:
First control signal is by the aperture of adjustment the 4th driven opening bottom valve, thus the flow rate of liquid of adjustment the first intake tunnel;
First control signal is by the aperture of adjustment the 5th driven opening bottom valve, thus the flow rate of liquid of adjustment the first exhalant canal.
In described step 2, the control method of the liquid level of the second aeration tank neutral and alkali waste water is comprise following one or more:
Second control signal is by the aperture of adjustment second driven opening bottom valve, thus the flow rate of liquid of adjustment the second intake tunnel;
Second control signal passes through adjustment the 3rd driven opening bottom valve or/and the aperture of the 4th driven opening bottom valve, thus the flow rate of liquid of adjustment the second exhalant canal;
The rotating speed of the second control signal by regulating the frequency of supply of variable frequency pump to change variable frequency pump, thus the flow rate of liquid of adjustment the second intake tunnel.
In described step 3, the 3rd control signal is by the aperture of adjustment the 3rd driven opening bottom valve, thus the flow rate of liquid of adjustment the first spray channels.
In described step 3, the rotating speed of the 4th control signal by regulating the frequency of supply of variable frequency pump to change variable frequency pump, or/and the 4th control signal is by the aperture of adjustment first driven opening bottom valve, thus the flow rate of liquid of adjustment the second spray channels.
Described fuzzy control model rule list be obtain according to the many experiments of liquid level and spray rate the first pH value sensor, the second pH value sensor, the first gas flowmeter, the second gas flowmeter and the second infrared temperature sensor, the first infrared temperature sensor best monitor database.
The invention has the beneficial effects as follows:
1, alkaline waste water repeatedly aeration desulphurization denitration equipment employing sandwich construction, is distributed in the alkaline waste water of different PH in each structure sheaf, carries out repeatedly aeration process with spray flue gas;
2, test obtain alkaline waste liquor temperature, alkaline waste liquor pH value, alkaline waste liquor liquid level, alkaline waste liquor spray rate, flue gas flow rate, discharge exhaust gas components sampled data carry out segmentation, realize the discretization of input and output amount, obfuscation, find out the mapping relations between constrained input, by online data analysis, set up model and the rule list of fuzzy control;
3, alkaline waste water repeatedly aeration desulphurization denitration equipment operational factor is monitored in real time, by according to aforesaid Mathematical Modeling, inquiry fuzzy control rule table, by controlling every layer of alkaline waste liquor liquid level and spray rate, ensures that alkaline waste water is to flue gas desulfurization and denitrification treatment effect.
The invention has the beneficial effects as follows: utilize alkaline waste water to reduce the processing cost of flue gas desulfurization and denitrification and alkaline waste water neutralization in the past to flue gas desulfurization and denitrification process.
Accompanying drawing explanation
Fig. 1 is flue gas of the present invention repeatedly aeration system for desulfuration and denitration structural representation.
Fig. 2 is the fuzzy control method schematic diagram of flue gas of the present invention repeatedly aeration system for desulfuration and denitration.
Wherein: 1, tower body; 2, aeration tank; 21, spray channels; 22, intake tunnel; 23, fume inlet passage; 24, exhalant canal; 25, flue collector; 251, flue is divided; 26, spraying rack; 27, smoke-outlet flue; 3, aeration tank; 31, spray channels; 32, intake tunnel; 33, fume inlet passage; 331, check valve; 34, exhalant canal; 35, flue collector; 351, flue is divided; 36, spraying rack; 4, chimney; 5, stoste pond; 51, transfer passage; 511, variable frequency pump; 6, recovery pond; 71, driven opening bottom valve; 72, driven opening bottom valve; 73, driven opening bottom valve; 74, driven opening bottom valve; 75, driven opening bottom valve; 81, fluid flowmeter; 82, fluid flowmeter; 83, fluid flowmeter; 84, gas flowmeter; 85, fluid flowmeter; 86, gas flowmeter; 91, infrared temperature sensor; 92, ultrasonic level gage; 93, pH value sensor; 94, infrared temperature sensor; 95, ultrasonic level gage; 96, pH value sensor.
Detailed description of the invention
Below in conjunction with the drawings and specific embodiments, content of the present invention is described in further details.
Embodiment
In order to make the sulfur and nitrogen oxides in alkaline waste water and flue gas fully react, discharge flue gas reaches discharge standard.First by a large amount of experiments, alkaline waste liquor temperature, alkaline waste liquor pH value, alkaline waste liquor liquid level, alkaline waste liquor spray rate, relation between flue gas flow rate and discharge exhaust gas components is obtained; Again by online data analysis, set up the model of fuzzy control; The change of alkaline waste liquor temperature, alkaline waste liquor pH value, flue gas flow rate in the flue gas desulfurization and denitrification device of the monitoring alkaline waste water that final system is real-time, control alkaline waste liquor liquid level, alkaline waste liquor is changed, alkaline waste liquor spray rate, the sulfur and nitrogen oxides realized in alkaline waste water and flue gas fully reacts.Flue gas repeatedly in aeration system for desulfuration and denitration the alkaline waste water pH value of each layer not identical, use repeatedly the mode of aeration and spray can effectively prevent flue gas and the alkaline waste water reaction time too short reaction efficiency that causes low.
One, please refer to shown in Fig. 1, the flue gas desulfurization and denitrification system of whole alkaline waste water can be divided into four parts: repeatedly desulfuring and denitrifying apparatus, checkout gear, operation control device, the actuating unit of aeration.Wherein:
1, repeatedly the desulfuring and denitrifying apparatus of aeration comprises: tower body 1, chimney 4, stoste pond 5, recovery pond 6.Wherein, the short transverse along this tower body 1 in tower body 1 is provided with lower aeration space and upper aeration space from the bottom to top successively; The bottom of lower aeration space and upper aeration space is respectively equipped with aeration tank 2 for splendid attire denitration alkaline waste water to be desulfurization and aeration tank 3, aeration tank 2 and aeration tank 3 are equipped with water inlet, delivery port, simultaneously, this aeration tank 2 bottom and be provided with flue collector 25, this aeration tank 3 bottom and be provided with flue collector 35; The upside of aeration tank 2 and aeration tank 3 is separately installed with one for spraying spraying rack 26 and the spraying rack 36 of alkaline waste water in the aeration tank of correspondence; Spraying rack 26 is connected with a spray channels 21, and the water inlet of aeration tank 2 is connected with an intake tunnel 22, and spraying rack 36 is connected with a spray channels 31, and the water inlet of aeration tank 3 is connected with an intake tunnel 32.Stoste pond 5 is connected with intake tunnel 32 and spray channels 31 respectively by transfer passage 51, for being respectively aeration tank 3 and spraying rack 36 provides alkaline waste water.Recovery pond 6 is connected with the delivery port of aeration tank 2 by an exhalant canal 24.The delivery port of aeration tank 3 is connected with intake tunnel 22 and spray channels 21 respectively by exhalant canal 34, for being respectively aeration tank 2 and spraying rack 26 provides alkaline waste water.Flue collector 25 is connected for the fume inlet passage 23 inputting flue gas in this flue collector 25 with one, the top of aeration space is provided with outlet flue, flue collector 35 is connected with a fume inlet passage 33, and outlet flue is connected with fume inlet passage 33 by a smoke-outlet flue 27, for inputting flue gas in flue collector 35.Chimney 4 is connected with the top of tower body 1, for discharging the waste gas after end reaction.Be provided with multiple point flue 251 be connected with flue collector 25 in flue collector 25, a point flue 251 is provided with multiple intercommunicating pore be connected with aeration tank 2; Be provided with multiple point flue 351 be connected with flue collector 35 in flue collector 35, a point flue 351 is provided with multiple intercommunicating pore be connected with aeration tank 3.
One check valve 331 is installed in fume inlet passage 33, to prevent gas backstreaming in flue collector 35 in aeration space.
2, monitoring device, monitoring device comprises aeration tank liquid monitoring device and flow monitoring device; Wherein, liquid monitoring device in aeration tank comprises: for the ultrasonic level gage 95 of the liquid level and temperature of monitoring aeration tank 2 neutral and alkali waste water respectively and infrared temperature sensor 94, for the ultrasonic level gage 92 of the liquid level and temperature of monitoring aeration tank 3 neutral and alkali waste water respectively and infrared temperature sensor 91 and the pH value sensor 96 of pH value and the pH value sensor 93 that are respectively used to aeration tank 2 and aeration tank 3 neutral and alkali waste water; Ultrasonic level gage 95 and infrared temperature sensor 94 are all installed on tower body 1 inwall between spraying rack 26 and aeration tank 2, ultrasonic level gage 92 and infrared temperature sensor 91 are installed on tower body 1 inwall between spraying rack 36 and aeration tank 3, and pH value sensor 96 and pH value sensor 93 are installed in aeration tank 2 and aeration tank 3 respectively; Flow monitoring device comprises the fluid flowmeter 81 be installed on spray channels 31, the fluid flowmeter 82 be installed on intake tunnel 32, the fluid flowmeter 83 be installed on spray channels 21, the gas flowmeter 84 be installed on smoke-outlet flue 27, the gas flowmeter 86 that is installed on the fluid flowmeter 85 on exhalant canal 24 and is installed on fume inlet passage;
3, actuating unit comprises: be installed on the driven opening bottom valve 71 on spray channels 31, intake tunnel 32, spray channels 21, intake tunnel 22 and exhalant canal 24, driven opening bottom valve 72, driven opening bottom valve 73, driven opening bottom valve 74 and driven opening bottom valve 75 respectively; Actuating unit also comprises the variable frequency pump 511 be installed on transfer passage 51.Actuating unit input adopts employing 4-20mA current signal.
4, operation control device, operation control device is used for the Monitoring Data according to monitoring device, carries out fuzzy control to actuating unit.Operation control device adopts can adapt to various severe running environment, and antijamming capability is strong, the S7-300 SIEMENS PLC that reliability is strong.At the built-in vertical fuzzy rule base of PLC, checkout gear all uses 4-20mA current signal to pass in PLC by input quantity, input quantity obfuscation will be detected, according to the input quantity inquiry fuzzy rule base after obfuscation, fuzzy control quantity is drawn by fuzzy rule base, draw accurate controlled quentity controlled variable by after fuzzy control quantity defuzzification, control through output module to executing agency, PLC exports the current signal adopting the 4-20mA identical with actuating unit.Please refer to shown in Fig. 2, a kind of adopt above-mentioned flue gas repeatedly aeration system for desulfuration and denitration carry out the method for fuzzy control, it comprises the following steps:
Step 1, generation fuzzy control model rule list, fuzzy control model rule list comprises liquid level specified rate defuzzification and spray rate specified rate defuzzification.Fuzzy control model rule list be obtain according to the many experiments of liquid level and spray rate pH value sensor 96, pH value sensor 93, gas flowmeter 84, gas flowmeter 86 and infrared temperature sensor 91, infrared temperature sensor 94 best monitor database.Namely for different alkaline waste water pH values and flue gas input quantity, the effect of energy-saving and emission-reduction has been reached by repeatedly debugging liquid level and spray rate.Fuzzy control model rule list, according to alkaline waste water pH value, flue gas input quantity and exhaust gas constituents content, exports corresponding liquid level specified rate defuzzification and spray rate specified rate defuzzification.
Step 2, to combine with the Monitoring Data of ultrasonic level gage 95 according to the liquid height specified rate of liquid level specified rate defuzzification, after obtaining best PID regulable control parameter by fuzzy reasoning, export one first control signal, this control signal is used for the liquid level of regulable control aeration tank 2 neutral and alkali waste water; Liquid height specified rate according to liquid level specified rate defuzzification combines with the Monitoring Data of ultrasonic level gage 92, after obtaining best PID regulable control parameter by fuzzy reasoning, export one second control signal, this control signal is used for the liquid level of regulable control aeration tank 3 neutral and alkali waste water.
Carrying out control method to the liquid level of aeration tank 2 neutral and alkali waste water is: the first control signal is by regulating the aperture of driven opening bottom valve 74, thus the flow rate of liquid of adjustment intake tunnel 22; Or/and the first control signal is by regulating the aperture of driven opening bottom valve 75, thus adjust the flow rate of liquid of aquaporin 24.
Carrying out control method to the liquid level of aeration tank 3 neutral and alkali waste water is: the second control signal is by regulating the aperture of driven opening bottom valve 72, thus the flow rate of liquid of adjustment intake tunnel 32; Or/and the second control signal is by regulating driven opening bottom valve 73 or/and the aperture of driven opening bottom valve 74, thus adjust the flow rate of liquid of aquaporin 34; Or/and the rotating speed of the second control signal by regulating the frequency of supply of variable frequency pump 511 to change variable frequency pump 511, thus the flow rate of liquid of adjustment intake tunnel 32.
Step 3, to combine with the Monitoring Data of fluid flowmeter 83 according to the spray rate specified rate of spray rate specified rate defuzzification, after obtaining best PID regulable control parameter by fuzzy reasoning, export one the 3rd control signal, this control signal is used for the discharge of regulable control spray channels 21; Spray rate specified rate according to spray rate specified rate defuzzification combines with the Monitoring Data of fluid flowmeter 81, after obtaining best PID regulable control parameter by fuzzy reasoning, export one the 4th control signal, this control signal is used for the discharge of regulable control spray channels 31.Wherein, the 3rd control signal is by regulating the aperture of driven opening bottom valve 73, thus the flow rate of liquid of adjustment spray channels 21.The rotating speed of 4th control signal by regulating the frequency of supply of variable frequency pump 511 to change variable frequency pump 511, or/and control signal is by regulating the aperture of driven opening bottom valve 71, thus the flow rate of liquid of adjustment spray channels 31.
Have particular application as example with one to be explained and illustrated above-mentioned fuzzy control method:
1. in stoste pond 5, PH, about 12, feeds this alkaline waste water repeatedly in aeration desulphurization denitration equipment by variable frequency pump 511, for spraying rack 36 and aeration tank 3 provide alkaline waste water.
2. what spraying rack 36 and the Flow-rate adjustment of aeration tank 3 adopted is that (primary control device is according to fuzzy rule base for close-loop control mode, draw the optimum working value of the spray rate of spraying rack 36 and the liquid level of aeration tank 3, by controlling the driven opening bottom valve of spray channels 31 and intake tunnel 32, can adjust spraying rack 36 spray rate and aeration tank 3 liquid level, by fluid flowmeter 81, fluid flowmeter 82 and ultrasonic level gage 92 carry out information feed back, motion control device compares information feed back and initial value and precisely controls the carrying out of spray rate and aeration tank liquid level).
3. monitor the pH value of aeration tank 3 in real time, when aeration tank 3 neutral and alkali waste liquid pH value be less than 10 or aeration tank 2 liquid level lower than setting value time, on aeration tank 2, the driven opening bottom valve 74 of intake tunnel 22 is opened, alkaline waste liquor in aeration tank 3 flows into aeration tank 2, when aeration tank 3 neutral and alkali waste liquid pH value be greater than 10.5 and aeration tank 2 liquid level higher than setting value time, on aeration tank 2, the driven opening bottom valve 74 of intake tunnel 22 is opened.
4. what spraying rack 26 and the Flow-rate adjustment of aeration tank 2 also adopted is that (primary control device is according to fuzzy rule base for close-loop control mode, draw the optimum working value of the spray rate of spraying rack 26 and the liquid level of aeration tank 2, by controlling the driven opening bottom valve of spray channels 21 and intake tunnel 22, can adjust spraying rack 26 spray rate and aeration tank 2 liquid level, information feed back is carried out by fluid flowmeter 83 and ultrasonic level gage 95, motion control device compares information feed back and initial value and precisely controls the carrying out of spray rate and aeration tank liquid level).
5. monitor the pH value of aeration tank 2 in real time, when aeration tank 2 neutral and alkali waste liquid pH value is less than 9 or the liquid level of aeration tank 2 higher than setting value time, on aeration tank 2, the driven opening bottom valve 74 of intake tunnel 22 is opened, aeration tank 2 is entered in recovery pond 6, when aeration tank 2 neutral and alkali waste liquid pH value is greater than 9.5 and aeration tank 2 lower than setting value time, on aeration tank 2, the driven opening bottom valve 74 of intake tunnel 22 cuts out.
Although the present invention is described by specific embodiment, it will be appreciated by those skilled in the art that, without departing from the present invention, various conversion can also be carried out and be equal to substituting to the present invention.In addition, for particular condition or application, various amendment can be made to the present invention, and not depart from the scope of the present invention.Therefore, the present invention is not limited to disclosed specific embodiment, and should comprise the whole embodiments fallen within the scope of the claims in the present invention.
Claims (10)
1. a flue gas repeatedly aeration system for desulfuration and denitration, it is characterized in that, it comprises:
Tower body (1), the short transverse along this tower body (1) in described tower body (1) is provided with lower aeration space and upper aeration space from the bottom to top successively; The bottom of described lower aeration space and upper aeration space is respectively equipped with the first aeration tank (2) for splendid attire denitration alkaline waste water to be desulfurization and the second aeration tank (3), described first aeration tank (2) is provided with the first water inlet, the first delivery port, this the first aeration tank (2) bottom and be provided with the first flue collector (25), described second aeration tank (3) is provided with the second water inlet, the second delivery port, this second aeration tank (3) bottom and be provided with the second flue collector (35); The upside of described first aeration tank (2) and the second aeration tank (3) is separately installed with one for spraying the first spraying rack (26) and second spraying rack (36) of alkaline waste water in the aeration tank of correspondence; Described first spraying rack (26) is connected with one first spray channels (21), described first water inlet is connected with one first intake tunnel (22), described second spraying rack (36) is connected with one second spray channels (31), and described second water inlet is connected with one second intake tunnel (32);
Stoste pond (5), described stoste pond (5) is connected with the second intake tunnel (32) and the second spray channels (31) respectively by transfer passage (51), for being respectively the second aeration tank (3) and the second spraying rack (36) provides alkaline waste water;
Recovery pond (6), described recovery pond (6) is connected with the first delivery port by one first exhalant canal (24);
Described second delivery port is connected with the first intake tunnel (22) and the first spray channels (21) respectively by the second exhalant canal (34), for being respectively the first aeration tank (2) and the first spraying rack (26) provides alkaline waste water;
Described first flue collector (25) is connected for the first fume inlet passage (23) inputting flue gas in this first flue collector (25) with one, the top of described lower aeration space is provided with outlet flue, described second flue collector (35) is connected with one second fume inlet passage (33), described outlet flue is connected with the second fume inlet passage (33) by a smoke-outlet flue (27), for input flue gas in the second flue collector (35);
Chimney (4), described chimney (4) is connected with the top of tower body (1), for discharging the waste gas after end reaction;
Monitoring device, described monitoring device comprises aeration tank liquid monitoring device and flow monitoring device;
Wherein, described aeration tank liquid monitoring device comprises: for the first ultrasonic level gage (95) and first infrared temperature sensor (94) of the liquid level and temperature of monitoring the first aeration tank (2) neutral and alkali waste water respectively, for the second ultrasonic level gage (92) and second infrared temperature sensor (91) of the liquid level and temperature of monitoring the second aeration tank (3) neutral and alkali waste water respectively, and be respectively used to the first pH value sensor (96) of pH value and the second pH value sensor (93) of the first aeration tank (2) and the second aeration tank (3) neutral and alkali waste water, described first ultrasonic level gage (95) and the first infrared temperature sensor (94) are all installed on tower body (1) inwall between the first spraying rack (26) and the first aeration tank (2), second ultrasonic level gage (92) and the second infrared temperature sensor (91) are installed on tower body (1) inwall between the second spraying rack (36) and the second aeration tank (3), described first pH value sensor (96) and the second pH value sensor (93) are installed in the first aeration tank (2) and the second aeration tank (3) respectively,
Described flow monitoring device comprises the first liquid flowmeter (81) be installed on the second spray channels (31), be installed on the second liquid flowmeter (82) on the second intake tunnel (32), be installed on the 3rd fluid flowmeter (83) on the first spray channels (21), be installed on the first gas flowmeter (84) on smoke-outlet flue (27), the second gas flowmeter (86) being installed on the 4th fluid flowmeter (85) on the first exhalant canal (24) and being installed on the first fume inlet passage,
Actuating unit, described actuating unit comprises: be installed on the first driven opening bottom valve (71) on the second spray channels (31), the second intake tunnel (32), the first spray channels (21), the first intake tunnel (22) and the first exhalant canal (24), the second driven opening bottom valve (72), the 3rd driven opening bottom valve (73), the 4th driven opening bottom valve (74) and the 5th driven opening bottom valve (75) respectively; Described actuating unit comprises the variable frequency pump (511) be installed on transfer passage (51) further;
Operation control device, described operation control device is used for the Monitoring Data according to monitoring device, carries out fuzzy control to actuating unit.
2. flue gas according to claim 1 repeatedly aeration system for desulfuration and denitration, it is characterized in that, be provided with multiple first point of flue (251) be connected with the first flue collector (25) in described first flue collector (25), described first point of flue (251) is provided with multiple the first intercommunicating pore be connected with the first aeration tank (2); Be provided with multiple second point of flue (351) be connected with the second flue collector (35) in described second flue collector (35), described second point of flue (351) is provided with multiple the second intercommunicating pore be connected with the second aeration tank (3).
3. flue gas according to claim 1 repeatedly aeration system for desulfuration and denitration, it is characterized in that, a check valve (331) is installed in described second fume inlet passage (33), to prevent gas backstreaming in the second flue collector (35) to lower aeration space.
4. flue gas according to claim 1 repeatedly aeration system for desulfuration and denitration, is characterized in that, described operation control device is PLC.
5. the flue gas according to any one of claim 1-4 repeatedly aeration system for desulfuration and denitration carries out a method for fuzzy control, and it is characterized in that, it comprises the following steps:
Step 1, generation fuzzy control model rule list, described fuzzy control model rule list comprises liquid level specified rate defuzzification and spray rate specified rate defuzzification;
Step 2, to combine with the Monitoring Data of the first ultrasonic level gage (95) according to the liquid height specified rate of liquid level specified rate defuzzification, after obtaining best PID regulable control parameter by fuzzy reasoning, export one first control signal, this first control signal is used for the liquid level of regulable control first aeration tank (2) neutral and alkali waste water; Liquid height specified rate according to liquid level specified rate defuzzification combines with the Monitoring Data of the second ultrasonic level gage (92), after obtaining best PID regulable control parameter by fuzzy reasoning, export one second control signal, this second control signal is used for the liquid level of regulable control second aeration tank (3) neutral and alkali waste water;
Step 3, to combine with the Monitoring Data of the 3rd fluid flowmeter (83) according to the spray rate specified rate of spray rate specified rate defuzzification, after obtaining best PID regulable control parameter by fuzzy reasoning, export one the 3rd control signal, the 3rd control signal is used for the discharge of regulable control first spray channels (21); Spray rate specified rate according to spray rate specified rate defuzzification combines with the Monitoring Data of first liquid flowmeter (81), after obtaining best PID regulable control parameter by fuzzy reasoning, export one the 4th control signal, the 4th control signal is used for the discharge of regulable control second spray channels (31).
6. method according to claim 5, is characterized in that, in described step 2, the control method of the liquid level of the first aeration tank (2) neutral and alkali waste water is comprise following one or more:
First control signal is by the aperture of adjustment the 4th driven opening bottom valve (74), thus the flow rate of liquid of adjustment the first intake tunnel (22);
First control signal is by the aperture of adjustment the 5th driven opening bottom valve (75), thus the flow rate of liquid of adjustment the first exhalant canal (24).
7. method according to claim 5, is characterized in that, in described step 2, the control method of the liquid level of the second aeration tank (3) neutral and alkali waste water is comprise following one or more:
Second control signal is by the aperture of adjustment second driven opening bottom valve (72), thus the flow rate of liquid of adjustment the second intake tunnel (32);
Second control signal passes through adjustment the 3rd driven opening bottom valve (73) or/and the aperture of the 4th driven opening bottom valve (74), thus the flow rate of liquid of adjustment the second exhalant canal (34);
The rotating speed of the second control signal by regulating the frequency of supply of variable frequency pump (511) to change variable frequency pump (511), thus the flow rate of liquid of adjustment the second intake tunnel (32).
8. method according to claim 5, is characterized in that, in described step 3, the 3rd control signal is by the aperture of adjustment the 3rd driven opening bottom valve (73), thus the flow rate of liquid of adjustment the first spray channels (21).
9. method according to claim 5, it is characterized in that, in described step 3, the rotating speed of 4th control signal by regulating the frequency of supply of variable frequency pump (511) to change variable frequency pump (511), or/and the 4th control signal is by the aperture of adjustment first driven opening bottom valve (71), thus the flow rate of liquid of adjustment the second spray channels (31).
10. method according to claim 5, it is characterized in that, described fuzzy control model rule list be obtain according to the many experiments of liquid level and spray rate the first pH value sensor (96), the second pH value sensor (93), the first gas flowmeter (84), the second gas flowmeter (86) and the second infrared temperature sensor (91), the first infrared temperature sensor (94) best monitor database.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410175336.1A CN103961990B (en) | 2014-04-28 | 2014-04-28 | A kind of flue gas repeatedly aeration system for desulfuration and denitration and control method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410175336.1A CN103961990B (en) | 2014-04-28 | 2014-04-28 | A kind of flue gas repeatedly aeration system for desulfuration and denitration and control method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN103961990A CN103961990A (en) | 2014-08-06 |
| CN103961990B true CN103961990B (en) | 2015-08-12 |
Family
ID=51232279
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410175336.1A Active CN103961990B (en) | 2014-04-28 | 2014-04-28 | A kind of flue gas repeatedly aeration system for desulfuration and denitration and control method |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN103961990B (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105700570B (en) * | 2016-04-15 | 2020-07-28 | 中国大唐集团科学技术研究院有限公司西北分公司 | SCR denitration control method for thermal power plant |
| CN109833765A (en) * | 2019-02-28 | 2019-06-04 | 成都瑞柯林工程技术有限公司 | Absorbing liquid injection system and the flue gas purification system and flue gas purifying method for applying it |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20070122900A1 (en) * | 2005-11-30 | 2007-05-31 | Scheuch Gmbh | Bioscrubber |
| CN201997255U (en) * | 2011-03-03 | 2011-10-05 | 中国科学院广州能源研究所 | Aerated integrated desulfuration and dust removal device |
| CN102515297A (en) * | 2011-11-23 | 2012-06-27 | 江苏省电力设计院 | Automatic control method for evaporation treatment of wet flue gas desulphurization wastewater |
| JP2012193252A (en) * | 2011-03-15 | 2012-10-11 | Toshiba Corp | Biodesulfurization device of biogas and cleaning method of the same |
| CN103319043A (en) * | 2012-03-23 | 2013-09-25 | 太平洋水处理工程有限公司 | Large circulation garbage percolate treatment process with characteristic of adaptability |
-
2014
- 2014-04-28 CN CN201410175336.1A patent/CN103961990B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20070122900A1 (en) * | 2005-11-30 | 2007-05-31 | Scheuch Gmbh | Bioscrubber |
| CN201997255U (en) * | 2011-03-03 | 2011-10-05 | 中国科学院广州能源研究所 | Aerated integrated desulfuration and dust removal device |
| JP2012193252A (en) * | 2011-03-15 | 2012-10-11 | Toshiba Corp | Biodesulfurization device of biogas and cleaning method of the same |
| CN102515297A (en) * | 2011-11-23 | 2012-06-27 | 江苏省电力设计院 | Automatic control method for evaporation treatment of wet flue gas desulphurization wastewater |
| CN103319043A (en) * | 2012-03-23 | 2013-09-25 | 太平洋水处理工程有限公司 | Large circulation garbage percolate treatment process with characteristic of adaptability |
Non-Patent Citations (3)
| Title |
|---|
| SBR法曝气量的模糊控制;曾薇等;《哈尔滨建筑大学学报》;20020228;第35卷(第1期);第53-57页 * |
| 控制氧化对湿法烟气脱硫过程的影响研究;庞旭等;《环境科学与技术》;20080531;第31卷(第5期);第87-90页 * |
| 气喷旋冲烟气脱硫装置运行关键控制;羊韵等;《环境工程》;20100630;第28卷(第3期);第63-65页 * |
Also Published As
| Publication number | Publication date |
|---|---|
| CN103961990A (en) | 2014-08-06 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN103933844B (en) | A kind of smoke processing system of alkaline waste water and control method | |
| CN104722203B (en) | A kind of SCR denitration control system of flue gas of heating furnace and method | |
| CN104656441B (en) | Gas purifying process modeling optimization method based on Unscented kalman neutral net | |
| CN105116855B (en) | A kind of optimal control method of flue gas circulating fluidized bed desulfurization | |
| CN204799086U (en) | Glass kiln flue gas desulfurization denitration processing system | |
| CN105498497A (en) | Flue gas desulfurization and denitration integrated equipment controlled through multiple variables and control method thereof | |
| CN202054663U (en) | Dissolved oxygen automatic control system for sewage water biological pool | |
| CN103961990B (en) | A kind of flue gas repeatedly aeration system for desulfuration and denitration and control method | |
| CN211871460U (en) | Novel ammonia nitrogen scrubbing treatment device | |
| CN204891566U (en) | Glass kiln gas cleaning device | |
| CN102631837B (en) | Integrated type sulfur-containing waste gas purifying device | |
| CN106647259B (en) | Coking flue gas desulfurization and denitrification integration apparatus centralized management system | |
| CN116688754A (en) | Ship flue gas desulfurization automatic control system and method thereof | |
| CN201058282Y (en) | Sea water desulfurization system | |
| CN113094986B (en) | Method for constructing prediction model of pollutant emission in flue gas of waste incinerator and application | |
| CN102746904B (en) | Treating device and treating process for waste gas produced in pyrolysis of waste rubber and plastics | |
| CN205323522U (en) | Flue gas desulfurization denitration integration equipment of multivariable control | |
| CN115253620B (en) | Automatic control method and system for denitration ammonia injection of glass kiln | |
| CN105727714B (en) | A kind of process and device for producing NaHS | |
| CN201346443Y (en) | Tail gas recycling and treatment system | |
| CN214486360U (en) | Desulfurization process on-line monitoring device in industrial production | |
| CN111450694B (en) | Desulfurization system industrial controller based on multi-objective optimization and control method | |
| CN208700612U (en) | Urea liquid blowdown recover | |
| CN203030172U (en) | Flue gas purification device | |
| CN112316682A (en) | Ammonia desulphurization method and equipment with accurate ammonia addition |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant |