CN208229629U - A kind of wet flue gas desulfurization oxidation energy-saving control device of blower - Google Patents
A kind of wet flue gas desulfurization oxidation energy-saving control device of blower Download PDFInfo
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- CN208229629U CN208229629U CN201820497354.5U CN201820497354U CN208229629U CN 208229629 U CN208229629 U CN 208229629U CN 201820497354 U CN201820497354 U CN 201820497354U CN 208229629 U CN208229629 U CN 208229629U
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- control device
- oxidation
- flue gas
- blower
- gas desulfurization
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Abstract
The utility model discloses a kind of wet flue gas desulfurization oxidation energy-saving control device of blower, it is related to controlling compressor flow technical field, the device includes calcium sulfite concentration measuring apparatus, control device, volume adjusting apparatus, and the calcium sulfite concentration measuring apparatus, the volume adjusting apparatus are connect with the control device signal respectively；The utility model realizes between calcium sulfite concentration and oxidation fan ontology suction air volume that foundation is corresponding to be contacted, and the target that oxidation fan ontology suction air volume is adjusted according to calcium sulfite concentration is realized, to realize the purpose of Fan Energy-saving.
Description
Technical field
The utility model relates to a kind of technical field for controlling compressor flow, specially a kind of wet flue gas desulfurization oxidation wind
Machine energy-saving control device.
Background technique
Wet desulfurization of flue gas by limestone-gypsum method technique is at present in the world to the dioxy generated in coal-burning power plant's coal-fired process
Change sulphur and remove the most mature technology of most widely used, technology, accounts for about and installed the 90% of WFGD unit capacity.The method is with lime
Stone is desulfurization absorbent, by spraying into absorbent slurry into absorption tower, is allowed to come into full contact with flue gas, mix, and to flue gas
It is washed, so that calcium carbonate in the sulfur dioxide and slurries in flue gas and the pressure oxidation air blasted chemical reaction,
Gypsum is ultimately produced, to achieve the purpose that scrubbing CO_2；The technique has desulfuration efficiency height, operational reliability height, inhales
It receives utilization rate height, adapt to the features such as large sized unit and high-concentration sulfur dioxide flue gas condition, however inhaled in sulfur dioxide
It receives, neutralize, aoxidize, crystallize and form final product (mainly CaSO3And CaSO4.2H2O the oxygen during the entire process of) needed for it
Change air quantity and CaSO4.2H2The quality of O does not efficiently control method.
The main control mode of desulfurization operation is the entrance titanium dioxide using the concentration of absorption tower outlet sulfur dioxide as target at present
Sulphur concentration is feed-forward signal, and for main control means, to control, slurries follow pump number of units to plasm PH value size and new lime stone slurry is thrown
Enter amount, to control desulfuration efficiency and outlet SO2 concentration；Crystallization degree is controlled with bottom slurry density size in absorption tower, if
Density is counted in 1050kg/m3~1250kg/m3, actual motion is in 1120kg/m3~1140kg/m3It carries out plasma discharge and is dehydrated gypsum processed,
The purity of gypsum is manually chemically examined, and the time is separated by 8 hours or more, and the result of chemical examination is representative poor, cannot instruct operation control, institute
It is terminated with manually chemically examining because unsustainable.Therefore, in actual operation to the purity of the degree of oxidation and gypsum without control hand
Section.
During to oxidation fan design selection, parameter is according to the maximum design sulfur content of boiler fired coal and most
Big fuel quantity calculates design, and actual motion oxidation fan is to carry out level pressure head according to design value, constant flow, determine power, oxygen
Change air quantity to be in without monitoring adjustment state, is always maintained at Design cooling load operation.A large amount of electric energy damage is directly resulted in, fortune is increased
Row cost；Although part proprietor has carried out corresponding transformation, oxidation air arrangement is adjusted such as in absorption tower,
Make to aoxidize the uniformity and efficiency improves, or big oxidation fan is replaced with low-power fan, some becomes high-power blower
Multiple small-power parallel runnings, and being put into operation number of units according to load adjustment blower, have it is manual fans entrance baffle is adjusted,
But all without accurately adjusting data foundation, it is difficult to realize accurate adjustment.
" lime stone-smoke-gas wet desulfurization " (abbreviation WFGD) forces the oxidation of oxidation stage in chemical reaction process at present
Degree there is no effectively measuring and control means, and the oxidation fan for providing oxidation air is caused to locate to design peak power state always
Lower operation, and WFGD is mainly used for heat power plant boiler flue gas desulfurization, is important desulfurization environmental protection equipment.Due to thermal power plant turbine
Group participates in peak regulation, and load change is big, and the equivalent available hours of unit are relatively low, and the oxidation fan run in WFGD system cannot be according to machine
Group load and sulfur content in coal size are adjusted on demand, keep oxidation fan power loss most of about 50%；Excessive oxidation
Air, which enters, generates excessive bubble in the slurries of absorption tower, excessive bubble can make various pumps in WFGD system generate vibration in slurries
It is dynamic, influence the safe operation and efficiency of pump；In the case where being unable to control oxidized input air, oxidizing potential is larger in WFGD system,
Accelerate corrosion under acidic environment, while mercury in flue gas and selenium can overflow under high potential, the mercury in flue gas and desulfurization wastewater
It is higher with selenium concentration, it is unfavorable for environmentally friendly operation.
Therefore, the defect for how improving the prior art is urgent problem.
Utility model content
The purpose of the utility model is to overcome the deficiencies in the prior art, provide a kind of wet flue gas desulfurization oxidation blower
Energy-saving control device, with solve in the prior art oxidation fan be unable to adjust automatically operation and energy consumption is high, can not effectively detect oxygen
The technical problems such as change degree and control gypsum purity.
The utility model is achieved through the following technical solutions:
The utility model provides a kind of wet flue gas desulfurization oxidation energy-saving control device of blower, which includes sulfurous acid
Calcium concentration measuring instrument, control device, volume adjusting apparatus, the calcium sulfite concentration measuring apparatus, the volume adjusting apparatus point
It is not connect with the control device signal.
Further, the sampling end of the calcium sulfite concentration measuring apparatus is arranged in absorption tower.
Further, one end of the volume adjusting apparatus is connected with oxidation fan ontology, and the volume adjusting apparatus
Output end is connect with the air intake of the oxidation fan ontology.
Further, the output end of the oxidation fan ontology is connect with the absorption tower.
Further, the output end of the oxidation fan ontology is connect by oxidation air with the absorption tower.
Further, the oxidation fan ontology is specially that high speed one-stage centrifugal blower or multiple centrifugal fan etc. can carry out
Entrance suction air volume adjusts the blower of transformation.
The utility model has the advantage that compared with prior art
1, the utility model provides a kind of wet flue gas desulfurization oxidation energy-saving control device of blower, dense by calcium sulfite
Degree measuring instrument detects the concentration of slurries sulphite in absorption tower and feeds back to control device, and control device controls air quantity and adjusts dress
It sets and the suction air volume of oxidation fan ontology is adjusted, realize while meeting its required airflow to oxidation fan ontology suction air volume
Adjusting, and then realize and reduce the section of energy consumption by changing its suction air volume in the case where oxidation fan ontology revolving speed is constant
Energy target, avoids traditional equipment and always remains under highest design standard the drawbacks of running and causing waste of energy, greatly
Reduce equipment operating cost；
2, by setting calcium sulfite concentration measuring apparatus, WFGD is chemically reacted and forces the calcium sulfite in oxidation stage
Current potential measures and output signal electric current, the concentration of signal code and manual measurement is compared, so that it is dense to reach calcium sulfite
The corresponding relationship of degree and signal code, current signal enters control device, by volume adjusting apparatus to oxidation fan ontology
Suction air volume carries out flow adjusting, so that the flow of calcium sulfite concentration and oxidation fan ontology be made to reach corresponding unified automatic control
System operation；
3, the product of desulfurization is the mixture of gypsum and calcium sulfite, can improve and maintain by the control of calcium sulfite concentration
The higher purity of gypsum, convenient for comprehensive utilization；
4, due to controlling the validity of oxidized input air, excessive oxidation air is avoided to enter in the slurries of absorption tower and generate
Excessive bubble can make the various pumps of WFGD system generate the drawbacks of vibrating, improve so as to avoid bubble excessive in slurries
The safety and efficiency of pump；
5, control oxidized input air just controls oxidizing potential, makes oxidizing potential in proper level, avoids under acidic environment
The corrosion of high oxidation potential accelerates, while mercury in flue gas and selenium spilling are reduced under low potential, makes in flue gas and desulfurization wastewater
Mercury and selenium concentration reduce.
Detailed description of the invention
Fig. 1 is a kind of structural schematic diagram of wet flue gas desulfurization oxidation energy-saving control device of blower in specific embodiment one.
1, calcium sulfite concentration measuring apparatus；2, control device；3, volume adjusting apparatus；4, absorption tower；5, oxidation fan sheet
Body；6, oxidation air.
Specific embodiment
The following will be combined with the drawings in the embodiments of the present invention, carries out the technical scheme in the embodiment of the utility model
Clearly and completely describe, it is clear that the described embodiments are only a part of the embodiments of the utility model, rather than whole
Embodiment.Based on the embodiments of the present invention, those of ordinary skill in the art are without making creative work
Every other embodiment obtained, fall within the protection scope of the utility model.
Embodiment
The present embodiment provides a kind of wet flue gas desulfurization oxidation energy-saving control device of blower, which includes that calcium sulfite is dense
Spend measuring instrument 1, control device 2, volume adjusting apparatus 3, calcium sulfite concentration measuring apparatus 1, volume adjusting apparatus 3 respectively with control
The connection of 2 signal of device；
One end of volume adjusting apparatus 3 is connected with oxidation fan ontology 5, and the output end of volume adjusting apparatus 3 and oxidation
The air intake of fan body 5 connects, i.e., the suction air volume of oxidation fan ontology 5 can be effectively controlled by volume adjusting apparatus 3；
Volume adjusting apparatus 3 is specially pneumatic, the regulating device that remotely can accurately control such as electronic, mechanical, hydraulic, in this way
Accurate control convenient for control device 2 to the intake of oxidation fan ontology 3 chemically reacts oxygen demand to match in absorption tower 4；
The output end of oxidation fan ontology 5 is connect by oxidation air 6 with absorption tower 4, is the chemical reaction in absorption tower 4
Oxygen supply；
In order to reduce improvement cost, wherein oxidation fan ontology 5 is specially high speed one-stage centrifugal blower or multistage centrifugal
Blower etc. can carry out the blower that entrance suction air volume adjusts transformation；
The blower selected in the present embodiment is centrifugal fan, and inlet end is opened type, and then by pacifying in inlet end
Volume adjusting apparatus 3 is filled, the intake of oxidation fan ontology 5 can be effectively controlled, and improvement cost is low；
Wherein calcium sulfite concentration measuring apparatus 1 is purchased by foreign countries, is the measuring instrument of mature and reliable, working principle pair
WFGD chemical reaction forces the current potential of (in absorption tower 4) calcium sulfite in oxidation stage to measure simultaneously output signal electric current,
The concentration of signal code and manual measurement is compared, to reach the corresponding relationship of calcium sulfite concentration and signal code, electric current
Signal enters control device 1, flow adjusting is carried out by suction air volume of the volume adjusting apparatus to oxidation fan ontology, to make Asia
The flow of calcium sulfate concentration and oxidation fan ontology reaches corresponding unified automatic running；
The runing adjustment process of the system: after the installation is completed, during WFGD system operation, slurries continuously take system
Sample, which flows through, is immersed in calcium sulfite concentration measuring apparatus 1 in measuring cylinder, while being manually sampled measurement to calcium sulfite concentration, surveys
The measurement data that calcium sulfite concentration measuring apparatus 1 generates after the completion of fixed is demarcated with manual sampling data, sets the WFGD system
The calcium sulfite concentration of the standard of system, gypsum concentration, oxidized input air corresponding relationship, then import data in control device 1, control
Device 1 processed is realized by volume adjusting apparatus 3 according to the correspondence and is adjusted to the air quantity of oxidation fan ontology 5, and oxidation fan is avoided
Ontology 5 is always to maintain the drawbacks of design standard operation causes waste of energy, realizes energy conservation object.
Table 1,2,3 is to the annual oxidation fan Evaluation on Energy Saving of 6 units of Huainan Ping Xu Power Generation Corporation Ltd. 2016.
Energy consumption saves calculation method (rate of load condensate): Qn=year hours run × (1- rate of load condensate) × current motor Effective power
Rate
Flat country fair unit oxidation fan (rate of load condensate influence) Evaluation on Energy Saving table (table one)
| Machine group # | Annual hours run | Annual unit load rate % | Blower effective power KW | Ten thousand degree/furnace is estimated in energy conservation | Electricity price converts (0.37 yuan) |
| One phase | 5780 | 73.82 | 265 | 40.0 | 14.8 ten thousand |
| Second phase | 6514 | 66.04 | 250 | 55.3 | 22.46 ten thousand |
| Three phases | 6416 | 67.32 | 400 | 83.87 | 31.87 ten thousand |
Note: one, the second phase is 600MW unit, and three phases were 1000MW unit.
Sulfur content deviation energy consumption saves calculation method (SO2 concentration rate): Qn=year hours run × SO2 concentration deviation ratio ×
Current motor effective power.
Absorption tower enters SO2 concentration deviation to oxidation fan (sulfur content influence) Evaluation on Energy Saving table (table two)
| Machine group # | One phase | Second phase | Three phases |
| Absorption tower entrance so2 concentration design value | 1757 | 1970 | 2458 |
| Actual motion receives tower entrance so2 concentration | 1100-1200 | 1100-1200 | 1100-1200 |
| The deviation ratio of actual motion and design | 34.5% | 41.6% | 53% |
| Sulfur content deviation energy consumption saves assessment (ten thousand degree) | 52.8 | 67.7 | 136 |
| Save electricity price conversion (ten thousand yuan) (0.37 yuan) | 19.5 | 25 | 50.3 |
2016 annual one, two, three phase rate of load condensates of Huainan Ping Xu power plant and SO2 concentration deviation can save assessment and summarize (table 3)
| Machine group # | One phase | Second phase | Three phases |
| Rate of load condensate influences energy saving electricity (ten thousand degree) | 40.0 | 55.3 | 83.87 |
| SO2 concentration deviation effects energy conservation electricity (ten thousand degree) | 52.8 | 67.7 | 136 |
| It is total to save electricity price conversion (ten thousand yuan/platform furnace year) by (0.37 yuan/degree) | 34.3 | 45.5 | 81.3 |
Complete 6 unit oxidation fan section potentiality of factory are 870.8 ten thousand degree of electricity, and conversion 3,220,000 yuan of of electricity price wherein do not include leaking out
The energy conservation that rate increases influences.
It can be seen from table 1,2 and 3 to 6 units' installation this set equipment of Huainan Ping Xu Power Generation Corporation Ltd. after,
Energy-saving potential is huge, can be effectively reduced units consumption, realizes energy conservation object；If the biggish region of sulfur content, load not
It is applied on unit that is high or participating in depth peak regulation, energy-saving potential is bigger.Meanwhile not only in oxidation fan energy conservation, to WFGD
Safe and environment-friendly, the economical operation of whole system all get a promotion.
Claims (6)
1. a kind of wet flue gas desulfurization oxidation energy-saving control device of blower, which is characterized in that the device includes calcium sulfite concentration
Measuring instrument (1), control device (2), volume adjusting apparatus (3), the calcium sulfite concentration measuring apparatus (1), the air quantity are adjusted
Device (3) is connect with the control device (2) signal respectively.
2. a kind of wet flue gas desulfurization oxidation energy-saving control device of blower according to claim 1, which is characterized in that described
The sampling end setting of calcium sulfite concentration measuring apparatus (1) is in absorption tower (4).
3. a kind of wet flue gas desulfurization oxidation energy-saving control device of blower according to claim 2, which is characterized in that described
One end of volume adjusting apparatus (3) is connected with oxidation fan ontology (5), and the output end of the volume adjusting apparatus (3) and institute
State the air intake connection of oxidation fan ontology (5).
4. a kind of wet flue gas desulfurization oxidation energy-saving control device of blower according to claim 3, which is characterized in that described
The output end of oxidation fan ontology (5) is connect with the absorption tower (4).
5. a kind of wet flue gas desulfurization oxidation energy-saving control device of blower according to claim 4, which is characterized in that described
The output end of oxidation fan ontology (5) is connect by oxidation air (6) with the absorption tower (4).
6. a kind of wet flue gas desulfurization oxidation energy-saving control device of blower according to claim 3 or 4, which is characterized in that
The oxidation fan ontology (5) is specially that high speed one-stage centrifugal blower or multiple centrifugal fan etc. can carry out entrance suction air volume tune
Save the blower of transformation.
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| CN201820497354.5U CN208229629U (en) | 2018-04-10 | 2018-04-10 | A kind of wet flue gas desulfurization oxidation energy-saving control device of blower |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110756035A (en) * | 2019-11-12 | 2020-02-07 | 北京国电龙源环保工程有限公司 | Method and system for controlling flow rate of desulfurization oxidation air and oxidation air supply device |
| EP3711846A1 (en) * | 2019-03-22 | 2020-09-23 | General Electric Company | System of reducing selenium contamination in waste water |
| CN112044270A (en) * | 2020-08-18 | 2020-12-08 | 北京国电龙源环保工程有限公司 | Desulfurization oxidation air system control method based on data-driven multiple models |
| CN113230847A (en) * | 2021-06-05 | 2021-08-10 | 安徽科力德能源环境科技有限公司 | Automatic centralized monitoring system for wet flue gas desulfurization multi-furnace multi-tower oxidation air volume |
| CN113230845A (en) * | 2021-06-05 | 2021-08-10 | 安徽科力德能源环境科技有限公司 | Wet flue gas desulfurization oxidation fan entry steady voltage whirl air regulation device |
| CN113357659A (en) * | 2021-06-05 | 2021-09-07 | 安徽科力德能源环境科技有限公司 | Wet flue gas desulfurization and oxidation monitoring and thermal power plant mixed sulfur co-combustion system and method |
| CN114073888A (en) * | 2020-08-14 | 2022-02-22 | 华电国际电力股份有限公司技术服务分公司 | Optimization method of oxidizing air system in limestone-gypsum wet desulphurization system |
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Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
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| EP3711846A1 (en) * | 2019-03-22 | 2020-09-23 | General Electric Company | System of reducing selenium contamination in waste water |
| US11091378B2 (en) | 2019-03-22 | 2021-08-17 | General Electric Company | Systems and methods of reducing selenium contamination in waste water |
| CN110756035A (en) * | 2019-11-12 | 2020-02-07 | 北京国电龙源环保工程有限公司 | Method and system for controlling flow rate of desulfurization oxidation air and oxidation air supply device |
| CN110756035B (en) * | 2019-11-12 | 2023-08-08 | 国能龙源环保有限公司 | Desulfurization oxidation wind volume control method, control system and oxidation wind supply device |
| CN114073888A (en) * | 2020-08-14 | 2022-02-22 | 华电国际电力股份有限公司技术服务分公司 | Optimization method of oxidizing air system in limestone-gypsum wet desulphurization system |
| CN114073888B (en) * | 2020-08-14 | 2024-01-26 | 华电国际电力股份有限公司技术服务分公司 | Optimization method of oxidation wind system in limestone-gypsum wet desulfurization system |
| CN112044270A (en) * | 2020-08-18 | 2020-12-08 | 北京国电龙源环保工程有限公司 | Desulfurization oxidation air system control method based on data-driven multiple models |
| CN113230847A (en) * | 2021-06-05 | 2021-08-10 | 安徽科力德能源环境科技有限公司 | Automatic centralized monitoring system for wet flue gas desulfurization multi-furnace multi-tower oxidation air volume |
| CN113230845A (en) * | 2021-06-05 | 2021-08-10 | 安徽科力德能源环境科技有限公司 | Wet flue gas desulfurization oxidation fan entry steady voltage whirl air regulation device |
| CN113357659A (en) * | 2021-06-05 | 2021-09-07 | 安徽科力德能源环境科技有限公司 | Wet flue gas desulfurization and oxidation monitoring and thermal power plant mixed sulfur co-combustion system and method |
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Address after: 230001 room 707, complex building, zone B, Shengjing Rongcheng, No. 6878, bustling Avenue, Baohe District, Hefei City, Anhui Province Patentee after: Anhui kelide energy and Environmental Technology Co.,Ltd. Address before: 230001 room 707, complex building, zone B, Shengjing Rongcheng, No. 6878, bustling Avenue, Baohe District, Hefei City, Anhui Province Patentee before: ANHUI KELIDE POWER TECHNOLOGY CO.,LTD. |