CN208097756U - Outer circulation desulfurizing tower automatic medicament feeding system - Google Patents
Outer circulation desulfurizing tower automatic medicament feeding system Download PDFInfo
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- CN208097756U CN208097756U CN201820375505.XU CN201820375505U CN208097756U CN 208097756 U CN208097756 U CN 208097756U CN 201820375505 U CN201820375505 U CN 201820375505U CN 208097756 U CN208097756 U CN 208097756U
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- desulfurizing tower
- dosing
- pump
- outer circulation
- circulatory pool
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Abstract
The utility model relates to a kind of outer circulation desulfurizing tower automatic medicament feeding systems, including grug feeding jar, dosing pump, circulatory pool and circulating pump, the outlet tube road end of circulating pump is connect with the spray head being located in desulfurizing tower, and outlet flue is connected to chimney lower part at the top of desulfurizing tower, it is characterised in that：PH is equipped in circulatory pool to count, the online concentration detector of sulfur dioxide is equipped in chimney, the signal output end of PH meter and the online concentration detector of sulfur dioxide is connect with the feedback unit of dosing controller, dosing controller is separately set for obtaining the analytical calculation unit of final dosage according to the feed forward element of the burning load control dosage of the sulfur content of coal and boiler, artificial fine-adjusting unit and according to feedback unit, feed forward element and artificial fine-adjusting unit, and the signal output end of dosing controller and the driving circuit of dosing pump are electrically connected.It fundamentally solves the problems, such as that MgO wastage is big existing for existing medicine system, desulfurization effect is unstable using reliably.
Description
Technical field
The utility model relates to desulfurization control system for adding drugs, especially a kind of outer circulation desulfurizing tower automatic medicament feeding system.
Background technique
For northern boiler mainly using coal as main energy sources, coal is impure more, is not clean energy resource, generates after burning a large amount of
SO2, it is discharged into atmosphere and pollutes air, desulphurization plant is exactly for mainly removing the SO generated after boiler combustion2, outer circulation
Desulfurizing tower is one kind of desulphurization plant.
Currently, outer circulation desulfurizing tower generallys use magnesia FGD method, concrete technology flow process is that raw material magnesia adds water
Stirring forms Mg（OH)2Liquid, be stored in grug feeding jar, mixing liquid be added to by dosing pump by circulatory pool, then pass through
Mixing liquid is sent to desulfurizing tower spray by circulating pump, and flue gas enters desulfurizing tower by deduster, sprays desulfurization by desulfurizing tower
After continue up and finally enter chimney and be discharged into atmosphere.The titanium dioxide that liquid containing magnesia contains in spray and in flue gas
Reaction of Salmon-Saxl generates MgSO3, oxidation pond is flowed by desulfurization tower bottom, oxidation fan injects air into oxidation pond, ultimately generates
Magnesium sulfate is the stable chemicals of property, is easy to store and transport.
In existing outer circulation desulfurizing tower medicine system, feedback method for dosing medicine is generallyd use, according to the time period dosing（Every one section
Certain magnesium oxide solution is added in time）Or frequency conversion dosing.But period control dosing is easy to produce biggish pH value fluctuation, and
Frequency conversion dosing is the value of feedback according to pH value, determines dosage, is a kind of control of lag.
Because the load condition of boiler determines the discharge amount of flue gas, and the SO in flue gas2Content by coal sulfur content and
What boiler load determined, so SO in flue gas2Content is uncertain, in addition the lag of system and MgO in solution cannot
Perfectly and SO2Reaction.The usage amount of final MgO often exceeds ideal value, and MgO is caused to waste, and the pH value fluctuation of solution is big, right
Equipment causes unnecessary loss, SO in flue gas2Detected value is unstable, and desulfurization effect is unstable.
Summary of the invention
The purpose of this utility model is to provide for a kind of service-strong outer circulation desulfurizing tower automatic medicament feeding system, from root
Solve the problems, such as that MgO wastage is big existing for existing medicine system, desulfurization effect is unstable in sheet.
The technical solution of the utility model is：
A kind of outer circulation desulfurizing tower automatic medicament feeding system, including grug feeding jar, set on grug feeding jar outlet tube road dosing pump,
Circulatory pool, the circulating pump set on the outlet tube road of circulatory pool being connected to the outlet tube road of dosing pump, the circulating pump go out
Liquid pipeline end is connect with the spray head being located in desulfurizing tower, and outlet flue is connected to chimney lower part at the top of the desulfurizing tower, special
Sign is：It is equipped with based on the PH by detecting liquid pH value in the circulatory pool, cigarette after being used to detect purification is equipped in the chimney
The online concentration detector of the sulfur dioxide of content of sulfur dioxide in gas, the PH meter and the online concentration detector of sulfur dioxide
Signal output end is connect with the feedback unit of dosing controller, the dosing controller separately set for according to the sulfur content of coal and
The burning load control feed forward element of dosage of boiler, artificial fine-adjusting unit and according to feedback unit, feed forward element and people
Work fine-adjusting unit obtains the analytical calculation unit of final dosage, the drive of the signal output end and dosing pump of the dosing controller
Dynamic circuit is electrically connected.
Above-mentioned outer circulation desulfurizing tower automatic medicament feeding system, the desulfurization tower bottom are connected using pipeline with oxidation pond, institute
It states and is continuously set between oxidation pond and circulatory pool there are two sedimentation basin, the oxidation pond outside is respectively equipped with oxidation fan and dry slag
Pond.
Above-mentioned outer circulation desulfurizing tower automatic medicament feeding system, sets blender I in the grug feeding jar, the feed inlet of grug feeding jar with
The export pipeline of medical fluid preparation pump is connected, and the entrance pipe of the medical fluid preparation pump is communicated with medical fluid preparation pond, the medical fluid system
Blender II is equipped in standby pond, the top in medical fluid preparation pond is equipped with magnesia storage tank, the magnesia storage tank and magnesia
Pneumatic Conveying Mechanism is equipped between transport vehicle, the top of the magnesia storage tank is equipped with bag filter.
The utility model has the beneficial effects that：
1, the feed forward element of the dosing controller of the utility model is according to the sulfur content of coal and the burning load frequency conversion of boiler
Dosage, on-demand dosing k1 are controlled, feedback unit is measured according to the PH pH value measured and the online concentration detector of sulfur dioxide
Content of sulfur dioxide（Reflect the operating condition of desulphurization system）Feedback control dosage, dosage is on the basis of feedovering given k1
Increase TC, boiler emission flue gas is made to be up to state standards, while artificial fine-adjusting unit can carry out trace regulation to dosage, make
Adding medicine control is more flexible reliable.
2, in terms of feedforward pilot angle degree, due to increasing feedback control, the requirement to feedforward control unit precision is reduced,
And the disturbance for the interference signal not measured can be corrected.
3, in terms of feedback control angle, feedforward control action carries out coarse adjustment to main interference in time, greatly reduces feedback control
Feedforward control is added in the burden of system, can preferably reduce inevitably waste, reduce the loss of equipment, fundamentally solve
The problem that magnesia wastage is big existing for existing medicine system, desulfurization effect is unstable.
Detailed description of the invention
Fig. 1 is the structural schematic diagram of the utility model；
Fig. 2 is the functional block diagram of the dosing controller of the utility model.
In figure：1. magnesia transport vehicle, 2. Pneumatic Conveying Mechanisms, 3. magnesia storage tanks, 4. bag filters, 5. medical fluid systems
Standby pond, 6. blenders II, 7. medical fluids prepare pump, 8. grug feeding jars, 9. blenders I, 10. dosing pumps, 11. dry slag baths, 12. oxidation winds
Machine, 13. oxidation ponds, 14. sedimentation basins, 15. circulatory pools, 16. circulating pumps, 17.PH meter, 18. chimneys, 19. sulfur dioxide are dense online
Spend detector, 20. desulfurizing towers, 21. spray heads, 22. feed forward elements, 23. feedback units, 24. analytical calculation units.
Specific embodiment
As shown in Figure 1, the outer circulation desulfurizing tower automatic medicament feeding system, including grug feeding jar 8, it is set to 8 outlet tube road of grug feeding jar
On dosing pump 10, be connected to the outlet tube road of dosing pump 10 circulatory pool 15, following set on the outlet tube road of circulatory pool 15
Ring pump 16, the outlet tube road end of the circulating pump 16 is connect with the spray head 21 being located in desulfurizing tower 20, the desulfurizing tower 20
Top outlet flue is connected to 18 lower part of chimney.20 bottom of desulfurizing tower is connected using pipeline with oxidation pond 13, the oxidation pond
It is continuously set between 13 and circulatory pool 15 there are two sedimentation basin 14, is respectively equipped with oxidation fan 12 and dry slag on the outside of the oxidation pond 13
Pond 11.Blender I 9 is set in the grug feeding jar 8, the feed inlet of grug feeding jar 8 is connected with the export pipeline of medical fluid preparation pump 7, described
The entrance pipe of medical fluid preparation pump 7 is communicated with medical fluid preparation pond 5, and the medical fluid preparation is equipped with blender II 6, the medicine in pond 5
The top that liquid prepares pond 5 is equipped with magnesia storage tank 3, and pneumatic conveying is equipped between the magnesia storage tank 3 and magnesia transport vehicle 1
The top of mechanism 2, the magnesia storage tank 3 is equipped with bag filter 4.
Wherein, it is equipped with 17 based on the PH by detecting liquid pH value in the circulatory pool 15, is equipped with and is used in the chimney 18
The online concentration detector 19 of sulfur dioxide of content of sulfur dioxide after detection purification in flue gas.As shown in Fig. 2, the PH meter 17
It is connect with the feedback unit of dosing controller 23 with the signal output end of the online concentration detector 19 of sulfur dioxide, the dosing
Controller is separately set for controlling the feed forward element 22 of dosage according to the sulfur content of coal and the burning load of boiler, manually finely tuning list
Member 25 and the analytical calculation unit of final dosage is obtained according to feedback unit 23, feed forward element 22 and artificial fine-adjusting unit 25
24, the driving circuit of the signal output end and dosing pump 10 of the dosing controller is electrically connected.
Dosing working principle：
According to desulphurization reaction equation 2MgO+2SO2+O2=2MgSO4, determine ideally MgO and 2SO2Ratio be
1:1, according to S+O2=SO2The ratio that can determine MgO and S is also 1:1.The sulfur content for being previously obtained coal is a%, and boiler is per hour
B tons of the coal amount that disappears, can calculate boiler per hour has the S of ab% to form SO by boiler combustion2, to form 2ab% tons of SO2, need
2ab%*0.625 tons of magnesia is wanted to neutralize, in addition reaction can not aoxidize magnesium loss completely and caused by system itself,
Need to be added 2ab%*0.625+x+y tons of magnesia when boiler burns the coal that b tons of sulfur content are a% per hour to neutralize, x is
Feedback control additive amount, y are artificial fine tuning.
Claims (3)
1. a kind of outer circulation desulfurizing tower automatic medicament feeding system, including grug feeding jar, set on grug feeding jar outlet tube road dosing pump, with
Circulatory pool, the circulating pump set on the outlet tube road of circulatory pool of the outlet tube road connection of dosing pump, the circulating pump go out liquid
Line end is connect with the spray head being located in desulfurizing tower, and outlet flue is connected to chimney lower part at the top of the desulfurizing tower, feature
It is：It is equipped with based on the PH by detecting liquid pH value in the circulatory pool, flue gas after being used to detect purification is equipped in the chimney
In content of sulfur dioxide the online concentration detector of sulfur dioxide, the letter of the PH meter and the online concentration detector of sulfur dioxide
Number output end is connect with the feedback unit of dosing controller, and the dosing controller is separately set for the sulfur content and pot according to coal
The burning load control feed forward element of dosage of furnace, artificial fine-adjusting unit and according to feedback unit, feed forward element and artificial
Fine-adjusting unit obtains the analytical calculation unit of final dosage, the driving of the signal output end and dosing pump of the dosing controller
Circuit is electrically connected.
2. outer circulation desulfurizing tower automatic medicament feeding system according to claim 1, it is characterised in that：The desulfurization tower bottom benefit
It is connected with pipeline with oxidation pond, is continuously set between the oxidation pond and circulatory pool there are two sedimentation basin, the oxidation pond outside is divided
It She You not oxidation fan and dry slag bath.
3. outer circulation desulfurizing tower automatic medicament feeding system according to claim 1, it is characterised in that：It sets and stirs in the grug feeding jar
Device I is mixed, the feed inlet of grug feeding jar is connected with the export pipeline of medical fluid preparation pump, the entrance pipe and medical fluid of the medical fluid preparation pump
Preparation pond communicates, and blender II is equipped in medical fluid preparation pond, and the top in medical fluid preparation pond is equipped with magnesia storage tank, institute
It states and is equipped with Pneumatic Conveying Mechanism between magnesia storage tank and magnesia transport vehicle, the top of the magnesia storage tank is removed equipped with cloth bag
Dirt device.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820375505.XU CN208097756U (en) | 2018-03-20 | 2018-03-20 | Outer circulation desulfurizing tower automatic medicament feeding system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820375505.XU CN208097756U (en) | 2018-03-20 | 2018-03-20 | Outer circulation desulfurizing tower automatic medicament feeding system |
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| Publication Number | Publication Date |
|---|---|
| CN208097756U true CN208097756U (en) | 2018-11-16 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201820375505.XU Expired - Fee Related CN208097756U (en) | 2018-03-20 | 2018-03-20 | Outer circulation desulfurizing tower automatic medicament feeding system |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109453629A (en) * | 2018-12-28 | 2019-03-12 | 启明星宇节能科技股份有限公司 | A kind of desulfurization automatic control system |
-
2018
- 2018-03-20 CN CN201820375505.XU patent/CN208097756U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109453629A (en) * | 2018-12-28 | 2019-03-12 | 启明星宇节能科技股份有限公司 | A kind of desulfurization automatic control system |
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| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20181116 Termination date: 20210320 |