CN202253701U - Dust removal and desulfuration device for boiler - Google Patents
Dust removal and desulfuration device for boiler Download PDFInfo
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- CN202253701U CN202253701U CN2011203657765U CN201120365776U CN202253701U CN 202253701 U CN202253701 U CN 202253701U CN 2011203657765 U CN2011203657765 U CN 2011203657765U CN 201120365776 U CN201120365776 U CN 201120365776U CN 202253701 U CN202253701 U CN 202253701U
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- boiler
- flue gas
- desulfurizing agent
- oxygen content
- desulfurizing
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Abstract
A dust removal and desulfuration device for a boiler comprises a blower, a coal economizer, and a desulfurization dust remover, wherein, a desulfurization agent pool is arranged below the desulfurization dust remover; an oxygen content analysis sensor is arranged between the chamber of the boiler and the coal economizer and is connected with a PLC (Programmable Logic Controller); a front dust remover is arranged at the back part of the coal economizer; a flue gas recirculation pipe with a flue gas recirculation blower is arranged between the desulfurization dust remover and the front dust remover, and the flue gas recirculation blower is connected with a boiler bottom air room at the outlet of the blower; the flue gas recirculation blower is driven by an AC variable frequency and speed regulation motor and controlled by the PLC; a pH value sensor is arranged in the desulfurization agent pool; an alkali water tank is arranged at the upper part of the desulfurization agent pool; an electromagnetic valve is arranged between the alkali water tank and the desulfurization agent pool; and the electrical signal of the pH value sensor is connected with the PLC and the electromagnetic valve. The dust removal and desulfuration device has the advantages that the boiler efficiency is improved, and smoke concentration and environmental pollution caused by sulfur dioxide emission are also remarkably reduced. Therefore, the dust removal and desulfuration device is particularly suitable for the modification of the overage coal burning boiler.
Description
Technical field
The utility model relates to a kind of coal-burning boiler field, specifically refers to a kind of boiler dusting desulfurizer with higher dedusting, desulfurization and energy-saving efficiency; It is specially adapted to transform existing middle and small burn coal boiler to improve boiler efficiency, reduces the pollution to surrounding environment simultaneously.
Background technology
Existing boiler dusting desulfur technology normally gets into desulfurizing dust-collector with the ash-laden gas of said boiler through flue, and this desulfurizing dust-collector throat porch is evenly sprayed into by water; Because this ash-laden gas high-speed motion, it is formed tiny water smoke with the water that sprays into by its fusion, moistening dust in the ash-laden gas.Said desulfurizing dust-collector is a circular cylinder body, and the water that is sprayed into injects tank from this circular cylinder body top, and gets in this circular cylinder body, thereby forms water membrane and mobile from top to bottom at this circular cylinder body inwall; And said ash-laden gas is got into by this circular cylinder body lower tangential, and rotation is risen in this circular cylinder body; So the ash-laden gas that this tangential gets into is under action of centrifugal force, the moisture film with this circular cylinder body internal face rubs all the time; Thereby after making ash-laden gas by the moistening impact of moisture film; Wherein grit flows to said desulfurizing dust-collector bottom with water, and discharges from gap, gets into sedimentation basin.
Flue gas after being purified is through said deduster cylindrical shell top, and the back of dewatering gets into secondary cylindrical shell, after the sedimentation separation dehydration, the flue gas after the final purification is sent into chimney through air-introduced machine discharge once more.
At present; The most coal-burning boiler of China still adopts traditional granite water film dust and multicyclone deduster; The dedusting and the desulfuration efficiency of this granite water film dust and multicyclone deduster are lower, are difficult to reach the boiler smoke discharge standard of Environmental Protection in China department defined; In addition, contain moisture in the flue gas of coal-burning boiler, to the air-introduced machine of said coal-burning boiler for producing the heavy corrosion effect, the influence security and service life of using thus.
The utility model content
The utility model technical problem to be solved is the situation to prior art, provides a kind of and not only can improve boiler operating efficiency but also can reduce boiler smoke dust content and SO
2The boiler dusting desulfurizer of discharging.
The utility model solves the problems of the technologies described above the technical scheme that is adopted: a kind of boiler dusting desulfurizer; Comprise that this boiler furnace bottom is provided with air blast; This air blast is communicated with a plurality of furnace bottom air compartments, and the flue gas of this boiler gets into desulfurizing dust-collector again through economizer, and this desulfurizing dust-collector below is provided with the desulfurizing agent pond; This desulfurizing agent injects said desulfurizing dust-collector through desulfurizing agent pump and pipeline; Boiler smoke discharges flue gas in the burner hearth through air-introduced machine through behind the desulfurization and dedusting through chimney, it is characterized in that:
A. be provided with the oxygen content analyte sensors between said boiler furnace and the said economizer, this oxygen content analyte sensors connects the oxygen content programmable controller module of a PLC; Said PLC is made up of two programmable controller modules, i.e. a said oxygen content programmable controller module and a desulfurizing agent acid number programmable controller module;
B. said economizer rear portion is provided with a preposition deduster; Be provided with the flue gas recirculation pipe of band flue gas recirculation blower fan between this preposition deduster and the said desulfurizing dust-collector; The outlet of this flue gas recirculation blower fan is connected with said blower export end through fume pipe, and is connected with said furnace bottom air compartment;
C. said flue gas recirculation blower fan is by the ac variable frequency speed regulation motor driven, and this ac variable frequency speed regulation motor is by the oxygen content programmable controller module controls of said PLC;
D. a potass pool is established on top, said desulfurizing agent pond; Be provided with magnetic valve between this potass pool and the said desulfurizing agent pond; Said desulfurizing agent is provided with the pH value sensor in the pond, and the signal of telecommunication of this pH value sensor is connected with the desulfurizing agent acid number programmable controller module of said PLC; This desulfurizing agent acid number programmable controller module is connected with said magnetic valve.
The utility model is owing to adopt the PLC control system of flue gas oxygen content analyte sensors and pH value sensor; Can analyze the oxygen content information of the flue gas that discharge the burning back in the burner hearth and the pH value information of said desulfurizing agent; And by behind the said PLC intelligent control, this flue gas gets into burner hearth through the flue gas return pipe again, constitutes the furnace bottom air compartment lower floor wind of burner hearth; Thereby can improve the amount of fresh air that gets into top, burner hearth coal seam, and can under lower excess air, move; Thereby can realize the higher thermal efficiency and lower NO
XDischarging, and the soot particle that original boiler smoke is carried reduces.
Be provided with the multi-layer rotational flow plate in the said desulfurizing dust-collector, every layer of eddy flow plate top is provided with the helical form nozzle.Be provided with three layers of eddy flow plate in the said desulfurizing dust-collector.The effect of this helical form nozzle is in the cylinder of tower desulfurizing dust-collector, can spray the desulfurizing agent that is uniformly distributed with; And, the pH value information of desulfurizing agent by said PLC intelligent control after, can be so that desulfurizing agent fully mixes the SO in the boiler smoke mutually with the boiler smoke of sulfur-bearing
2Composition is absorbed with atomizing in the said desulfurizing agent fully.
Said furnace bottom air compartment is provided with a plurality of Artificial Control valves, and this control valve is in order to regulate this air compartment temperature.
The utility model is owing to adopt the flue gas return pipe system of access burner hearth and the PLC control system of oxygen content analyte sensors and pH value sensor; Compared with prior art; Its advantage is to have improved boiler efficiency simultaneously, has significantly reduced the pollution of the discharging of dust concentration and sulfur dioxide to environment; It is suitable for transforming existing use outmoded coal-burning boiler for many years especially.
Description of drawings
Fig. 1 is the utility model structural representation;
Fig. 2 is the logic diagram of the utility model operation;
The specific embodiment
Embodiment describes in further detail the utility model below in conjunction with accompanying drawing.
The purpose of the utility model is the combustion process that is used to improve coal-burning boiler, exerts oneself to improve boiler efficiency and increase; Reduce the SO in the boiler smoke simultaneously
2With NO
XDischarging; Not only boiler operating efficiency can be improved but also pollution can be reduced surrounding air.
Fig. 1 illustrates an embodiment of the utility model, and it comprises the boiler 1 of being with economizer 8, and the lower furnace portion of this boiler is provided with air blast 6, and this air blast is communicated with a plurality of furnace bottom air compartments 11.The flue gas of this boiler gets into desulfurizing dust-collector 4 after getting into a preposition deduster 3 through economizer 8 again, and boiler smoke discharges flue gas in the burner hearth through air-introduced machine 8 through behind the desulfurization and dedusting through chimney 9; As shown in Figure 1.
This boiler smoke between preposition deduster 3 and desulfurizing dust-collector 4, be provided with one be connected with flue gas recirculation blower fan 5 flue gas recirculation pipe 2; The other end outlet of this flue gas recirculation blower fan 5 is connected through the port of export of fume pipe 21 with said air blast 6; Get into furnace bottom air compartment 11, constitute lower floor's wind; Like this, air blast 6 is communicated with furnace bottom air compartment 11 with flue gas recirculation blower fan 5 jointly, promptly makes the partial fume in this boiler back end ductwork mix with the compressed air that air blast 6 comes out through flue gas recirculation blower fan 5, sends into boiler furnace bottom air compartment and burning together; With the operating temperature of effective control boiler furnace, and prevent the burner hearth coking, improve boiler output; Simultaneously, can reduce in the partial fume entering desulfurizing dust-collector and circulate, thus the discharge capacity of minimizing flue gas.
Burner hearth passage at boiler is provided with analysis of oxygen content sensor 13, and this analysis of oxygen content sensor connects the oxygen content programmable controller module 23 of a PLC20; This PLC20 is made up of two programmable controller modules, i.e. a said oxygen content programmable controller module 23 and a desulfurizing agent acid number programmable controller module 22;
The analysis of oxygen content sensor is used for analyzing the oxygen content of burner hearth flue gas, and oxygen content information is sent to oxygen content programmable controller module 23 immediately, and is as shown in Figure 2; The utility model analysis of oxygen content sensor adopts MK-Series Intelligent zirconium oxide-oxygen content analyzer.
Furnace bottom air compartment 11 is provided with a plurality of Artificial Control valves 15, and this control valve is in order to regulate the air compartment temperature.
Flue gas recirculation blower fan 5 is by the ac variable frequency speed regulation motor driven, and this ac variable frequency speed regulation motor is controlled by oxygen content PLC21.
Oxygen content information from analysis of oxygen content sensor 13 is sent to oxygen content PLC23 immediately, and after analyzing computing, the ac variable frequency speed regulation motor of FEEDBACK CONTROL flue gas recirculation blower fan, the size with control flue gas recirculation amount realizes best combustion conditions.
The circulating flue gas of flue gas recirculation blower fan 5 can also cool off owing to need big excess air to cause red-hot fire box temperature usually; The air output that can also coordinate simultaneously to burn and need from the air blast of air compartment.
Because flue gas specific heat is big than air, so it can take away more heat transfer from burner hearth, can significantly reduce the combustion temperature in hearth peak value; The cooling of burner hearth has nothing to do with the required air capacity of burning again, and therefore, the utility model can move under lower excess air.
In addition, excess air descends the boiler smoke flow velocity is reduced, thereby the soot particle that boiler smoke is carried reduces.
Reduce excess air and can directly cause fuel saving.Reduce excess air and also promptly reduce the flue gas of discharging chimney, the air quantity that adds furnace air on the other hand is also few, and both have all played the effect of fuel saving.The utility model has significantly improved the combustion process of coal-burning boiler, and its effect is to have reduced blackness of exhaustion and smoke content that chimney is discharged, wherein NO
XDischarging can reduce about 50 percent.
This boiler smoke under the dust seizure, gets into dust collection bucket 31 in preposition deduster 3; Then, boiler smoke gets into tower desulfurizing dust-collector 4 through the horizontal flue tangential again, and flue gas rotates rising in the tower desulfurizing dust-collector of this circle; Be provided with multi-layer rotational flow plate 41 (present embodiment is set to three layers of eddy flow plate 41) in this tower desulfurizing dust-collector; Every layer of eddy flow plate top is provided with helical form nozzle 42, and the effect of this helical form nozzle is in the cylinder of tower desulfurizing dust-collector, can spray equally distributed desulfurizing agent; And, can be so that desulfurizing agent fully mixes the SO in the boiler smoke mutually with the boiler smoke of sulfur-bearing
2Composition is by in the said desulfurizing agent and absorb.
Desulfurizing agent is to be connected with nozzle 42 from desulfurizing agent pond 5 through pipeline through desulfurizing agent pump 7; And the pH value of desulfurizing agent is provided by potass pool 9; Be provided with magnetic valve 14 between this potass pool 9 and the desulfurizing agent pond 5, in desulfurizing agent pond 5, be provided with pH value sensor 12, the signal of telecommunication of this pH value sensor is connected with desulfurizing agent acid number PLC22.
The pH value of the desulfurizing agent that gushes out from helical form nozzle 42 can be through desulfurizing agent acid number PLC22 and magnetic valve 14 adjustings.The desulfurizing agent that helical form nozzle 42 gushes out makes it on eddy flow plate 41, form the even hydrojet face of fan-shaped, and liquid film is evenly adherent; The flue gas that rotation is risen in tower desulfurizing dust-collector 4 contacts with the fan-shaped hydrojet of spray down, through multi-layer rotational flow plate 41, has increased flue gas time of staying in desulfurizing dust-collector again, has promptly prolonged flue gas and desulfurizing agent neutralization reaction time; SO in the flue gas
2Become several times by in the desulfurizing agent and absorb; At last,, remove flue gas after being purified moisture, send into chimney 9 through air-introduced machine 8 and discharge through being arranged on the demister 47 of tower desulfurizing dust-collector 4 upper ends.
In sum, ash-laden gas is under action of centrifugal force, and the hydrojet with this circular cylinder body internal face rubs all the time; Thereby after making ash-laden gas by the moistening impact of hydrojet; Wherein grit flows to said desulfurizing dust-collector bottom with water, and discharges from gap, gets into sedimentation basin.
The utility model operation is such with control procedure:
The combustion product gases of burner hearth flows to the analysis of oxygen content sensor, and this analysis of oxygen content sensor provides oxygen content information to oxygen content PLC23 (oxygen content programmable controller) after the oxygen content analysis; This moment, oxygen content PLC was according to oxygen content information Control and the ac variable frequency speed regulation motor of regulating furnace bottom air compartment flow, increasing or to reduce the flue gas flow that gets into burner hearth, and the flue gas oxygen content of realizing ideal, this is to be the control procedure of benchmark with the flue gas oxygen content.
The utility model is the benchmark control procedure with above-mentioned flue gas oxygen content just, improves the combustion process of coal-burning boiler, realizes reducing excess air, reduces the blackness of exhaustion, smoke content and the NO that discharge
XDischarging.
But the adjusting of said flue gas recirculation is automatic control mode both, also optionally uses manually-operated; To realize the diversity of the method for operation.
The characteristic of the utility model is that the mechanical type coal-burning boiler can move under lower excess air, and when operation fire box temperature relatively low.Thereby constitute the less again NO of a kind of higher thermal efficient
XThe coal-burning boiler of discharging.
The utility model is after several four tons of boilers of certain brewery are implemented, and its operation test record shows, the 225mg/Nm of the dust concentration of discharging after original dedusting
3Reduce to 42mg/Nm
3, simultaneously, the 286mg/Nm of sulfur dioxide after original desulfurization
3Reduce to 135mg/Nm
3
The utility model has improved boiler efficiency simultaneously, has reduced NO
XDischarging is to the pollution of environment; Therefore it is suitable for transforming existing use outmoded coal-burning boiler for many years especially.
Claims (4)
1. a boiler dusting desulfurizer comprises that this boiler furnace bottom is provided with air blast, and this air blast is communicated with a plurality of furnace bottom air compartments; The flue gas of this boiler gets into desulfurizing dust-collector again through economizer; This desulfurizing dust-collector below is provided with the desulfurizing agent pond, and this desulfurizing agent injects said desulfurizing dust-collector through desulfurizing agent pump and pipeline, and the flue gas of said boiler is through behind the desulfurization and dedusting; Through air-introduced machine flue gas in the burner hearth is discharged through chimney, it is characterized in that:
A. be provided with oxygen content analyte sensors (13) between said boiler (1) burner hearth and the said economizer (8), this oxygen content analyte sensors connects the oxygen content programmable controller module (23) of a PLC (20); Said PLC (20) is made up of two programmable controller modules, i.e. a said oxygen content programmable controller module (23) and a desulfurizing agent acid number programmable controller module (22);
B. said economizer (8) rear portion is provided with a preposition deduster (4); Be provided with the flue gas recirculation pipe (2) of band flue gas recirculation blower fan (5) between this preposition deduster (4) and the said desulfurizing dust-collector (4); This flue gas recirculation blower fan outlet is connected with said air blast (6) port of export through fume pipe (21), and is connected with said furnace bottom air compartment (11);
C. said flue gas recirculation blower fan (5) is by the ac variable frequency speed regulation motor driven, and this ac variable frequency speed regulation motor is controlled by said PLC oxygen content programmable controller module (23);
D. a potass pool (9) is established on top, said desulfurizing agent pond (16); Be provided with magnetic valve (14) between this potass pool (9) and the said desulfurizing agent pond (16); Be provided with pH value sensor (12) in the said desulfurizing agent pond (16), the signal of telecommunication of this pH value sensor is connected with the desulfurizing agent acid number programmable controller module (22) of said PLC; The desulfurizing agent acid number programmable controller module (22) of said PLC is connected with said magnetic valve (14).
2. according to the said boiler dusting desulfurizer of claim 1, it is characterized in that: be provided with multi-layer rotational flow plate (41) in the said desulfurizing dust-collector (4), every layer of eddy flow plate top is provided with helical form nozzle (42).
3. according to the said boiler dusting desulfurizer of claim 2, it is characterized in that: be provided with three layers of eddy flow plate (41) in the said desulfurizing dust-collector (4).
4. according to the said boiler dusting desulfurizer of claim 1, it is characterized in that: said furnace bottom air compartment (11) is provided with a plurality of Artificial Control valves (15), and this control valve is in order to regulate this air compartment temperature.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011203657765U CN202253701U (en) | 2011-09-24 | 2011-09-24 | Dust removal and desulfuration device for boiler |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011203657765U CN202253701U (en) | 2011-09-24 | 2011-09-24 | Dust removal and desulfuration device for boiler |
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| Publication Number | Publication Date |
|---|---|
| CN202253701U true CN202253701U (en) | 2012-05-30 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011203657765U Expired - Fee Related CN202253701U (en) | 2011-09-24 | 2011-09-24 | Dust removal and desulfuration device for boiler |
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|---|---|
| CN (1) | CN202253701U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102343208A (en) * | 2011-09-24 | 2012-02-08 | 宁波怡诺能源科技有限公司 | Dedusting and desulfurizing device for boiler |
| CN107029522A (en) * | 2017-05-31 | 2017-08-11 | 四川省阳子森环保设备有限公司 | A kind of flue gas desulfurization handles integrated apparatus |
-
2011
- 2011-09-24 CN CN2011203657765U patent/CN202253701U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102343208A (en) * | 2011-09-24 | 2012-02-08 | 宁波怡诺能源科技有限公司 | Dedusting and desulfurizing device for boiler |
| CN107029522A (en) * | 2017-05-31 | 2017-08-11 | 四川省阳子森环保设备有限公司 | A kind of flue gas desulfurization handles integrated apparatus |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| 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: 20120530 Termination date: 20170924 |