CN204665257U - A kind of circulating fluidized bed boiler - Google Patents
A kind of circulating fluidized bed boiler Download PDFInfo
- Publication number
- CN204665257U CN204665257U CN201520245446.0U CN201520245446U CN204665257U CN 204665257 U CN204665257 U CN 204665257U CN 201520245446 U CN201520245446 U CN 201520245446U CN 204665257 U CN204665257 U CN 204665257U
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- Prior art keywords
- burner hearth
- feed
- fluidized bed
- feedwater
- circulating fluidized
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Abstract
The utility model discloses a kind of circulating fluidized bed boiler, comprise burner hearth, cyclone separator and automatic water supply device, material returning device is connected with below described cyclone separator, described burner hearth lower end is provided with air compartment, described air compartment and burner hearth are separated by by air distribution plate, described air distribution plate has been evenly arranged bell-type windshield, in described burner hearth, desulfurization porch is provided with secondary air channel, described material returning device opening part is provided with entrance airduct, also be coated with water-cooling wall outside described burner hearth, boiler is also connected with automatic water supply device; Flue gas after hearth combustion enters cyclone separator through furnace outlet, the feed separation of being carried secretly by flue gas is got off, return burner hearth circulation by material returning device to fire again, separative efficiency is very high, there is obvious energy-conserving and environment-protective effect, the setting of automatic water supply device alleviates the operation burden of process operator, and the water-cooling wall wear-and corrosion-resistant of external sheath, effectively extends the service life of boiler.
Description
Technical field
The utility model relates to field of boilers, specifically a kind of circulating fluidized bed boiler.
Background technology
Along with country's " fossil-fuel power plant atmospheric pollutant emission standard " issuing and implementation, require that the flue dust of coal-burning boiler, sulfur dioxide, nitrogen oxide, mercury and mercuric compounds discharge and all will reach limit value.For sulfide minimum discharge, utilizing of itself and boiler combustion and desulfurizing agent is closely related, at present in control sulfide emission index, there is no for overall boiler burning structure design; With the use of boiler Cascade three-elements feed water control system to come into operation trouble, be not easy to adjust, poor reliability, not easy to operate; The common circulating fluidized bed boiler water-cooling wall of the overwhelming majority is all use common paint to carry out corrosion-resistant, and need to bear high temperature corrosion when following the water screen tube work of bad Fluidized Bed Boiler, wear problem is very outstanding; Use pyrolytic coating metal due to complicated construction technique and there is certain danger, expensive, there is certain limitation; And used blast cap in use its wind distributing hole easily by the feed blocking fallen, temperature is caused to rise, reduce service life, cloth wind uniformity is not good enough, cause burning insufficient, material particles easily falls into air compartment, causes a large amount of dust stratification of air compartment, impact is normal ventilates, and reduces the security that equipment runs.
Utility model content
The purpose of this utility model is to provide a kind of circulating fluidized bed boiler, to solve the problem proposed in above-mentioned background technology.
For achieving the above object, the utility model provides following technical scheme:
A kind of circulating fluidized bed boiler, comprise burner hearth, cyclone separator and automatic water supply device, material returning device is connected with below described cyclone separator, described burner hearth lower end is provided with air compartment, described air compartment and burner hearth are separated by by air distribution plate, described air distribution plate has been evenly arranged bell-type windshield, described bell-type windshield is by blast cap inner sleeve and be connected ground blast cap overcoat with its socket and form, the bottom of described blast cap overcoat offers several big wind distributing holes, the upper end perisporium of described blast cap inner sleeve offers several little wind distributing holes, described blast cap inner sleeve lower end is fixedly welded on air distribution plate, the top of described air distribution plate is cast with concrete, in described burner hearth, desulfurization porch is provided with secondary air channel, and described secondary air channel front end is provided with nozzle, and described material returning device opening part is provided with entrance airduct, is also coated with water-cooling wall outside described burner hearth, described automatic water supply device comprises drum, described drum side is provided with plenum chamber, described plenum chamber is connected with main steam header road, described main steam header road is provided with main steam flow meter, described drum sidewall is provided with the first liquid level of steam drum meter and the second liquid level of steam drum meter, boiler feedwater pipeline is provided with feed meter and feed-regulating valve, described feed-regulating valve comprises main feed-regulating valve and secondary feed-regulating valve, described main steam flow meter is connected with feedwater regulator control system, described feedwater regulator control system comprises input/output port fastener, main feedwater three impulses regulator control system and secondary feedwater three impulses regulator control system.
As further program of the utility model: described material returning device comprises shell and refractory material back boxing.
As the utility model further scheme: scribble nanometer high-temperature wearable corrosion-preventing energy-saving coating outside described water-cooling wall, described nanometer high-temperature wearable corrosion-preventing energy-saving coating is made up of the material with high IR emissivity, and described material is superfine nano particle.
As the utility model further scheme: described entrance airduct is provided with flowmeter and pressure gauge.
Compared with prior art, the beneficial effects of the utility model are:
Furnace outlet has been arranged in juxtaposition thermal insulation cyclone separator, flue gas after hearth combustion enters cyclone separator through furnace outlet, the feed separation of being carried secretly by flue gas is got off, return burner hearth circulation by material returning device to fire again, separative efficiency is very high, optimizing and revising of stove combustion air distribution, makes boiler premature cure thing generate and controls in lower value, have obvious energy-conserving and environment-protective effect; The setting of automatic water supply device alleviates the operation burden of process operator, water-cooling wall can make circulating fluidized bed boiler water-cooling wall not easily occur oxidation, wearing and tearing, also can repair the local corrosion of circulating fluidized bed boiler water-cooling wall simultaneously, thermal-flame and high-temperature gas oxide etch boiler can be stoped, substantially prolongs the service life of circulating fluidized bed boiler.
Accompanying drawing explanation
Fig. 1 is the structural representation of circulating fluidized bed boiler.
Fig. 2 is the structural representation of circulating fluidized bed boiler middle bell jar formula blast cap.
Fig. 3 is the structural representation of automatic water supply device in circulating fluidized bed boiler.
In figure: 1-burner hearth, 2-cyclone separator, 3-material returning device, 4-bell-type windshield, 41-blast cap inner sleeve, 42-blast cap overcoat, 43-big wind distributing hole, the little wind distributing hole of 44-, 45-air distribution plate, 46-concrete, 5-air compartment, 6-secondary air channel, 7-nozzle, 8-entrance airduct, 9-automatic water supply device, 91-first liquid level of steam drum meter, 92 drums, 93-plenum chamber, 94-second liquid level of steam drum meter, 95-main steam flow meter, 96-input/output port fastener, 97-main feedwater three impulses regulator control system, 98-pair feedwater three impulses regulator control system, the main feed-regulating valve of 99-, the secondary feed-regulating valve of 910-, 911-feed meter, 912-water regulator control system, 10-water-cooling wall.
Detailed description of the invention
Below in conjunction with the accompanying drawing in the utility model embodiment, be clearly and completely described the technical scheme in the utility model embodiment, obviously, described embodiment is only the utility model part embodiment, instead of whole embodiments.Based on the embodiment in the utility model, those of ordinary skill in the art are not making the every other embodiment obtained under creative work prerequisite, all belong to the scope of the utility model protection.
Refer to Fig. 1, in the utility model embodiment, a kind of circulating fluidized bed boiler, comprises burner hearth 1, cyclone separator 2 and automatic water supply device 9.
Be connected with material returning device 3 below described cyclone separator 2, described burner hearth 1 lower end is provided with air compartment 5, and described air compartment 5 is separated by by air distribution plate with burner hearth 1, and air distribution plate is membrane wall structure, it has been evenly arranged bell-type windshield 4; In described burner hearth 1, desulfurization porch is provided with secondary air channel 6, and described secondary air channel 6 front end is provided with nozzle 7; Described material returning device 3 opening part is provided with entrance airduct 8, and the mother of described entrance airduct 8 manages and installs flowmeter, pressure gauge; Water-cooling wall 10 is also coated with outside described burner hearth 1.
Described material returning device 3 is made up of the refractory material back boxing of shell and three-decker, and three layers of refractory material are respectively high-strength abrasion-proof castable, lightening casting material and light-weight insulating brick, and the returning charge elegance high pressure cold wind of described material returning device 3, is sent into by mushroom-shaped blast cap.
Nanometer high-temperature wearable corrosion-preventing energy-saving coating is scribbled outside described water-cooling wall 10, the thickness of described nanometer high-temperature wearable corrosion-preventing energy-saving coating is 0.5mm, described nanometer high-temperature wearable corrosion-preventing energy-saving coating is made up of the material with high IR emissivity, and described material is superfine nano particle; Superfine nano particle infiltration in described nanometer high-temperature wearable corrosion-preventing energy-saving coating is in circulating fluidized bed boiler water-cooling wall tissue; new compound is generated with base material; namely form the protective layer of 3 D stereo inorganic network structure, described protective layer has hard, fine and close, resistance to elevated temperatures.
Refer to Fig. 2, described automatic water supply device 9 comprises drum 92, described drum 92 is other is provided with plenum chamber 93, described plenum chamber 93 is connected with main steam header road, main steam header road is provided with main steam flow meter 95, and described main steam flow meter 95 exports as feed-forward signal the flow signal detected to feedwater regulator control system; Drum 92 sidewall is provided with the first liquid level of steam drum meter 91 and the second liquid level of steam drum meter 94, first liquid level of steam drum meter 91 and the second liquid level of steam drum meter 94 and exports the liquid level signal detected to feedwater regulator control system respectively; Boiler feedwater pipeline is provided with feed meter 911 and feed-regulating valve, described feed meter 911 exports the flow signal detected to feedwater regulator control system, feedwater regulator control system exports adjustment signal to feed-regulating valve, thus controls the flow of feed-regulating valve; Described feed-regulating valve comprises main feed-regulating valve 99 and secondary feed-regulating valve 910, described feedwater regulator control system is made up of input/output port fastener 96, main feedwater three impulses regulator control system 97 and secondary feedwater three impulses regulator control system 98, and main feedwater three impulses regulator control system 97 exports adjustment signal to main feed-regulating valve; Described pair feedwater three impulses regulator control system 98 exports adjustment signal to secondary feed-regulating valve 910.
Refer to Fig. 3, described bell-type windshield 4 is mainly by blast cap inner sleeve 41 and be connected with its socket that ground blast cap overcoat 42 forms, several big wind distributing holes 43 are had in the bottom of blast cap overcoat 42, the upper end perisporium of blast cap inner sleeve 41 has several little wind distributing holes 44, and the distance between little wind distributing hole 44 lower edge and big wind distributing hole 43 upper limb is 40 ~ 90mm; During installation, the lower end of blast cap inner sleeve 41 is fixedly welded on air distribution plate 45, and cast concrete 46 is in order to insulation above air distribution plate 45 obtains, and overcoat is by inner sleeve supporting and location.
Operation principle of the present utility model is: during boiler operatiopn, and the wind that air compartment is 5 li enters from the lower end of blast cap inner sleeve 41, and several the little wind distributing holes 44 then offered from blast cap inner sleeve 41 upper end and blast cap inner sleeve 41 top evenly spray, and turn back 180.Enter in the inside and outside jacket layer of blast cap, finally spray from several big wind distributing holes 43 of blast cap overcoat bottom surrounding, enter in burner hearth 1, boiling material, makes it Thorough combustion; Secondary Air is by being distributed in the secondary air channel 6 on burner hearth 1 front-back wall, by nozzle 7, send into the height space that the material burning of burner hearth 1 bottom needs air, ensure that burning proceeds to the oxygen-excess combustion stage from reducing atmosphere, improve efficiency of combustion, reduce afterbody unburned carbon in flue dust; Flue gas after burning enters cyclone separator 2 through burner hearth 1 outlet, and the feed separation of being carried secretly by flue gas is got off, and returns burner hearth 1 circulate and burn by material returning device 3; In material combustion process in burner hearth 1, automatic water supply device 9 works simultaneously, inner steam water-level is main signal, and in adjustment process, play corrective action, steam flow signal is feed-forward signal, when load variations, it, fast in water level deviation signal, plays feed-forward regulation effect, can prevent the control valve misoperation caused due to false water level simultaneously, feedwater flow signal can reflect regulating effect in time, eliminates the spontaneous disturbance of feedwater flow; Whole circulating fluidized bed boiler work safety is steady, meets the demand of modernized society.
To those skilled in the art, obvious the utility model is not limited to the details of above-mentioned one exemplary embodiment, and when not deviating from spirit of the present utility model or essential characteristic, can realize the utility model in other specific forms.Therefore, no matter from which point, all should embodiment be regarded as exemplary, and be nonrestrictive, scope of the present utility model is limited by claims instead of above-mentioned explanation, and all changes be therefore intended in the implication of the equivalency by dropping on claim and scope are included in the utility model.Any Reference numeral in claim should be considered as the claim involved by limiting.
In addition, be to be understood that, although this description is described according to embodiment, but not each embodiment only comprises an independently technical scheme, this narrating mode of description is only for clarity sake, those skilled in the art should by description integrally, and the technical scheme in each embodiment also through appropriately combined, can form other embodiments that it will be appreciated by those skilled in the art that.
Claims (4)
1. a circulating fluidized bed boiler, comprise burner hearth (1), cyclone separator (2) and automatic water supply device (9), it is characterized in that, described cyclone separator (2) below is connected with material returning device (3), described burner hearth (1) lower end is provided with air compartment (5), described air compartment (5) and burner hearth (1) are separated by by air distribution plate, described air distribution plate is evenly arranged bell-type windshield (4), described bell-type windshield (4) by blast cap inner sleeve (41) and be connected with its socket ground blast cap overcoat (42) form, the bottom of described blast cap overcoat (42) offers several big wind distributing holes (43), the upper end perisporium of described blast cap inner sleeve (41) offers several little wind distributing holes (44), described blast cap inner sleeve (41) lower end is fixedly welded on air distribution plate (45), the top of described air distribution plate (45) is cast with concrete (46), the interior desulfurization porch of described burner hearth (1) is provided with secondary air channel (6), described secondary air channel (6) front end is provided with nozzle (7), described material returning device (3) opening part is provided with entrance airduct (8), and described burner hearth (1) outside is also coated with water-cooling wall (10), described automatic water supply device (9) comprises drum (92), described drum (92) side is provided with plenum chamber (93), described plenum chamber (93) is connected with main steam header road, described main steam header road is provided with main steam flow meter (95), described drum (92) sidewall is provided with the first liquid level of steam drum meter (91) and the second liquid level of steam drum meter (94), boiler feedwater pipeline is provided with feed meter (911) and feed-regulating valve, described feed-regulating valve comprises main feed-regulating valve (99) and secondary feed-regulating valve (910), described main steam flow meter (95) is connected with feedwater regulator control system (912), described feedwater regulator control system comprises input/output port fastener (96), main feedwater three impulses regulator control system (97) and secondary feedwater three impulses regulator control system (98).
2. circulating fluidized bed boiler according to claim 1, is characterized in that, described material returning device (3) comprises shell and refractory material back boxing.
3. circulating fluidized bed boiler according to claim 1, it is characterized in that, described water-cooling wall (10) outside scribbles nanometer high-temperature wearable corrosion-preventing energy-saving coating, described nanometer high-temperature wearable corrosion-preventing energy-saving coating is made up of the material with high IR emissivity, and described material is superfine nano particle.
4. circulating fluidized bed boiler according to claim 1, is characterized in that, described entrance airduct (8) is provided with flowmeter and pressure gauge.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520245446.0U CN204665257U (en) | 2015-04-22 | 2015-04-22 | A kind of circulating fluidized bed boiler |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520245446.0U CN204665257U (en) | 2015-04-22 | 2015-04-22 | A kind of circulating fluidized bed boiler |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204665257U true CN204665257U (en) | 2015-09-23 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201520245446.0U Expired - Fee Related CN204665257U (en) | 2015-04-22 | 2015-04-22 | A kind of circulating fluidized bed boiler |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN204665257U (en) |
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2015
- 2015-04-22 CN CN201520245446.0U patent/CN204665257U/en not_active Expired - Fee Related
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| Date | Code | Title | Description |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20150923 Termination date: 20160422 |
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| CF01 | Termination of patent right due to non-payment of annual fee |