CN204042876U - A kind of can the CFBB of smooth combustion low heating value coal gangue - Google Patents
A kind of can the CFBB of smooth combustion low heating value coal gangue Download PDFInfo
- Publication number
- CN204042876U CN204042876U CN201420533538.4U CN201420533538U CN204042876U CN 204042876 U CN204042876 U CN 204042876U CN 201420533538 U CN201420533538 U CN 201420533538U CN 204042876 U CN204042876 U CN 204042876U
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- China
- Prior art keywords
- secondary air
- economizer
- burner hearth
- tube
- panel casing
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E20/00—Combustion technologies with mitigation potential
- Y02E20/34—Indirect CO2mitigation, i.e. by acting on non CO2directly related matters of the process, e.g. pre-heating or heat recovery
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- Fluidized-Bed Combustion And Resonant Combustion (AREA)
Abstract
The utility model discloses a kind of can the CFBB of smooth combustion low heating value coal gangue, it comprises boiler support, boiler support is equipped with drum, fin panel casing burner hearth, cyclone separator and smoke evacuation hoistway, in fin panel casing burner hearth, bottom is fluidized bed combustion chamber, the bottom of fluidized bed combustion chamber is connected with a blast pipe, smoke evacuation hoistway is provided with the superheater be connected with cyclone separator, economizer and air preheater, fin panel casing burner hearth is provided with the rare close district that combines of water-cooling wall, the rare close water cooling tube combining place of district of water-cooling wall has upper segmental arc, changeover portion and lower segmental arc, boiler support is connected with secondary air box, many secondary air channels secondary air box are equipped with, each root secondary air channel is connected with multiple secondary air nozzle, multiple secondary air nozzle is spaced apart from top to bottom and respectively butterfly throttle is housed along secondary air channel.This boiler effectively can solve the problem of the wearing and tearing of stove internal heating surface and combustion instability.
Description
Technical field
The utility model be specifically related to a kind of can the CFBB of smooth combustion low heating value coal gangue.
Background technology
According to statistics, China's coal-mine existing hillock more than 1600 seat, accumulating amount about 4,500,000,000 tons, annual spoil output about 1.5 ~ 200,000,000 tons.These spoils not only occupy a large amount of arable land, also cause pollution to a certain degree to environment.About 15% of total amount is accounted for for what generate electricity in gangue.This is because generally only have the gangue of carbon content > 20% to be suitable for as boiler oil, its low heat valve is at 6.27 ~ 12.54MJ/kg.Use the boiler of low heating value coal gangue at present, it comprises drum, fin panel casing burner hearth, cyclone separator and smoke evacuation hoistway, fin panel casing burner hearth to be fixed on buckstay and to be connected with boiler structure, the top outlet flue of fin panel casing burner hearth is connected with cyclone separator, in fin panel casing burner hearth, bottom is fluidized bed combustion chamber, and smoke evacuation hoistway is provided with the superheater, economizer and the air preheater that are connected with cyclone separator.There is following shortcoming in its structure: 1. because the rare close district that combines (top of fluidized bed combustion chamber) of water-cooling wall of fin panel casing burner hearth middle and lower part exists an expanding reach, the direct expanding reach forming bending easily makes water-cooling wall impaired, i.e. fin panel casing serious wear, thus cause greatly reduce service life and maintenance maintenance cost up; 2. the effect of cyclone separator is separated from air-flow by the solid material of a large amount of high-temperature high concentration, send combustion chamber back to, thus maintain the certain granule density of fluidized bed combustion chamber, keep good fluidized state, thus ensure that fuel and desulfurizing agent make boiler reach desirable efficiency of combustion and desulfuration efficiency after repeatedly circulating, repeatedly burn and reacting, low and the isolation resistance of existing the Effiency of whirlwind Separator is large, thus causes that efficiency of combustion is low and desulfurized effect is undesirable; 3. fluidized bed combustion chamber also exists the problem of burner hearth center anoxic, and the uneven impact that high density material particles group exists the adherent covering water-cooling wall that vertically drops, each aspect particle level moves the interference of even not, each turning region of variation eddy current and pan-up speed, thus cause burning insufficient and the easy phenomenon forming nitrogen oxide.
Utility model content
The utility model provide a kind of effective minimizing waterwall tube cracking for the problems referred to above and ensure clean-burning can the CFBB of smooth combustion low heating value coal gangue.
In order to solve the problems of the technologies described above, what the utility model provided a kind of following design feature can the CFBB of smooth combustion low heating value coal gangue, it comprises boiler support, boiler support is equipped with drum, fin panel casing burner hearth, cyclone separator and smoke evacuation hoistway, the top outlet flue of fin panel casing burner hearth is connected with cyclone separator, in fin panel casing burner hearth, bottom is fluidized bed combustion chamber, the bottom of fluidized bed combustion chamber is connected with a blast pipe, smoke evacuation hoistway is provided with the superheater be connected with cyclone separator, economizer and air preheater, one time blast pipe is connected with air feed system by air preheater, its design feature is: the middle and lower part of described fin panel casing burner hearth is provided with the rare close district that combines of water-cooling wall, the water cooling tube at the rare close place of district that combines of water-cooling wall has the upper segmental arc of outside flaring from top to bottom, the lower segmental arc of vertical changeover portion and inside gradually closing, boiler support is connected with the secondary air box being positioned at changeover portion lower outside, the many secondary air channels be periphery along fin panel casing burner hearth secondary air box are equipped with, each root secondary air channel is connected with and penetrates from the lower segmental arc of fin panel casing burner hearth and to be tilted to multiple secondary air nozzles of lower setting, multiple secondary air nozzle is spaced apart from top to bottom and respectively butterfly throttle is housed along secondary air channel.
Cyclone separator comprises smoke-intake pipe, Membrane Separator Cylinder for CFB Boiler and smoke exhaust pipe, smoke-intake pipe one end is connected to fin panel casing upper furnace, the other end are connected to Membrane Separator Cylinder for CFB Boiler top along the tangential direction of Membrane Separator Cylinder for CFB Boiler, smoke exhaust pipe is connected to the top of Membrane Separator Cylinder for CFB Boiler and smoke exhaust pipe has the dip section stretching into separator cartridge intracoelomic cavity, the inner extending end of dip section is positioned at below the center line of smoke-intake pipe, the axis of the axis runout Membrane Separator Cylinder for CFB Boiler of dip section is arranged, the bottom of Membrane Separator Cylinder for CFB Boiler has top-down converging transition, and the bottom of converging transition is connected with ash releasing tube.
Cyclone separator also comprises the separation chamber be connected to below ash releasing tube, the skimming baffle be obliquely installed is provided with in separation chamber, skimming baffle is evenly equipped with multiple aperture, separation chamber's inner chamber is separated into Hui Zha district and discharge region by skimming baffle, separation chamber is connected with and stretches into Hui Zha district and coordinate time slag baffle plate controlling back slag with skimming baffle, the sidepiece of separation chamber is equipped with the gas discharge pipe, the bottom that are communicated with discharge region and the dust ejector tube be communicated with discharge region is housed, and the slag-returning tube be communicated with Hui Zha district is also equipped with in the bottom of separation chamber.
Separation chamber is bolted with adjustment bolt, described time slag baffle plate is connected on adjustment bolt, and return elasticity slag trap slag baffle plate being connected with and tilting to stretch to skimming baffle, the space between elasticity slag trap and skimming baffle is back slag passage.
Economizer comprises the economizer bracing frame be connected in smoke evacuation hoistway, the many pipe row bracing frames stretched economizer bracing frame are equipped with, many economizer tube of roundabout bending setting many pipe row bracing frames are equipped with, the straightway of economizer tube is equipped with helical blade, the end of economizer tube is bending section, inside the bending section of many economizer tube, side guard plate is housed, smoke evacuation hoistway is equipped with the upper guard board be positioned at above economizer tube, the top of described side guard plate is connected on upper guard board, deflector above the bending section covering on economizer tube is housed between upper guard board and smoke evacuation hoistway inwall.
Pipe row bracing frame comprises and being connected on economizer bracing frame and the biside plate be oppositely arranged, and at least one installing rack is housed between biside plate, installing rack be provided with for economizer tube through and centre is expanded, the two ends spindle passing hole of tightening up up and down.
After adopting said structure, by the setting of the middle and lower part of fin panel casing burner hearth, the rare close district that combines of water-cooling wall has the upper segmental arc of outside flaring, the lower segmental arc of vertical changeover portion and inside gradually closing, while increasing fluid bed bed surface, adherent circulating ash can not do oblique diffusion again after this vertical changeover portion, but continue to flow straight up, effectively can alleviate the wearing and tearing of water-cooling wall herein, Secondary Air plays the effect regulating burning, the air quantity of each nozzle is controlled by butterfly throttle, Secondary Air enters burner hearth by overfire air jet and burns, reduce primary air ratio, improve secondary air ratio, promote air stage feeding, namely lower furnace portion flue-gas temperature is reduced, can also oxidation district after-flame, utilize the structure of nozzle, Secondary Air is made to have enough penetration capacitys, postcombustion burning needed for air capacity while and the back-mixing of strength imparting material, the distribution of abundant adjustment temperature field in furnace, flue-gas temperature is more evenly distributed, inhibit the generation of thermal NO to a certain extent, simultaneously, the low recycle stock of more temperature is made to return emulsion zone, heat is absorbed at emulsion zone, take away the heat of burning release, heat exchange is carried out in burner hearth middle and upper part and water-cooling wall.
The solid material of a large amount of high-temperature high concentration is separated by the transformation of cyclone separator from air-flow, send combustion chamber back to, thus maintain the certain granule density of fluidized bed combustion chamber, keep good fluidized state, thus ensure that fuel and desulfurizing agent make boiler reach desirable efficiency of combustion and desulfuration efficiency after repeatedly circulating, repeatedly burn and reacting; Allocate secondary air into by flue gas, be blown into after making flue gas mixing air above grate, reduce be blown into distinguished and admirable in oxygen content, thus effectively prevent the generation of nitrogen oxide, effectively reduce the final discharge of nitrogen oxide; The bent portion of economizer hand is provided with side guard plate; side guard plate queues the effect supported to pipe; pipe is arranged more firm, not easily deform, extend the service life of economizer; be provided with deflector simultaneously; can prevent flue gas washing away pipe bent position, avoid the wearing and tearing of pipe bent position, the pipe row bracing frame of setting plays the effect of flexible support; avoid flue gas and its rigid shock, available protecting economizer hand.
In sum, this boiler effectively can solve the problem of the wearing and tearing of stove internal heating surface and combustion instability, thus can smooth combustion low heating value coal gangue, be particularly suitable for the boiler ordinary cycle fluidized-bed combustion boiler of other various atures of coal of originally burning being transform as lower heat of combustion gangue, its transformation is simple, short construction period, investment cost is low.
Accompanying drawing explanation
Fig. 1 is structural representation of the present utility model;
Fig. 2 is the structural representation that fin panel casing burner hearth is connected with a blast pipe and secondary air box;
Fig. 3 is the structural representation of cyclone separator;
Fig. 4 is the structural representation analysed and observe along A-A line in Fig. 3;
Fig. 5 is the structural representation of economizer;
Fig. 6 is the structural representation analysed and observe along B-B line in Fig. 5;
Fig. 7 is the structural representation analysed and observe along C-C line in Fig. 5.
Detailed description of the invention
Below in conjunction with accompanying drawing, detailed description of the invention of the present utility model is described in further detail:
As depicted in figs. 1 and 2, provided by the utility modelly the CFBB of smooth combustion low heating value coal gangue can comprise boiler support 1, drum 2 boiler support 1 is equipped with, fin panel casing burner hearth 3, cyclone separator 4 and smoke evacuation hoistway 5, the top outlet flue of fin panel casing burner hearth 3 is connected with cyclone separator 4, in fin panel casing burner hearth 3, bottom is fluidized bed combustion chamber, the bottom of fluidized bed combustion chamber is connected with a blast pipe 9, a blast pipe 9 is also equipped with air door, thus control the intake of a blast pipe 9, smoke evacuation hoistway 5 is provided with the superheater 6 be connected with cyclone separator 4, economizer 7 and air preheater 8, one time blast pipe 9 is connected with air feed system 10 by air preheater 8, air feed system 10 comprises blower fan and corresponding pipeline, its concrete syndeton is prior art, the middle and lower part of fin panel casing burner hearth 3 is provided with the rare close district 31 that combines of water-cooling wall, the water cooling tube at the rare close place of district 31 that combines of water-cooling wall has the upper segmental arc of outside flaring from top to bottom, the lower segmental arc of vertical changeover portion and inside gradually closing, boiler support 1 is connected with the secondary air box 11 being positioned at changeover portion lower outside, the many secondary air channels 12 be periphery along fin panel casing burner hearth 8 secondary air box 11 are equipped with, each root secondary air channel 12 is connected with and penetrates from the lower segmental arc of fin panel casing burner hearth 3 and to be tilted to multiple secondary air nozzles 13 of lower setting, multiple secondary air nozzle 13 is spaced apart from top to bottom and butterfly throttle 14 is housed respectively along secondary air channel 12, be provided with two secondary air nozzles in the present embodiment, its axis and horizontal line angle are about 15-20 degree, namely the secondary formed oliquely downward is distinguished and admirable, by material back-mixing, flue-gas temperature is more evenly distributed, the burning of low heating value coal gangue is more abundant.
As shown in Figure 3 and Figure 4, cyclone separator 4 comprises smoke-intake pipe 41, Membrane Separator Cylinder for CFB Boiler 42 and smoke exhaust pipe 43, smoke-intake pipe 41 one end is connected to fin panel casing burner hearth 3 top, the other end is connected to the top of Membrane Separator Cylinder for CFB Boiler 42 along the tangential direction of Membrane Separator Cylinder for CFB Boiler, smoke exhaust pipe 43 is connected to the top of Membrane Separator Cylinder for CFB Boiler 42 and smoke exhaust pipe 43 has the dip section 431 stretching into Membrane Separator Cylinder for CFB Boiler 42 inner chamber, the inner extending end of dip section 431 is positioned at below the center line of smoke-intake pipe 41, the axis of the axis runout Membrane Separator Cylinder for CFB Boiler 42 of dip section 431 is arranged, namely the axis of dip section 431 is arranged near smoke-intake pipe 41, the bottom of Membrane Separator Cylinder for CFB Boiler 42 has top-down converging transition 421, the bottom of converging transition 421 is connected with ash releasing tube 44, cyclone separator 4 also comprises the separation chamber 45 be connected to below ash releasing tube 44, the skimming baffle 46 be obliquely installed is provided with in separation chamber 45, skimming baffle 46 is evenly equipped with multiple aperture, powder ash and other gas can be discharged by aperture, separation chamber 45 inner chamber is separated into Hui Zha district and discharge region by skimming baffle 46, separation chamber 45 is connected with and stretches into Hui Zha district and coordinate time slag baffle plate 47 controlling back slag with skimming baffle 46, the sidepiece of separation chamber 45 is equipped with the gas discharge pipe 48 be communicated with discharge region, the dust ejector tube 49 be communicated with discharge region is equipped with in bottom, the slag-returning tube 50 be communicated with Hui Zha district is also equipped with in the bottom of separation chamber 45, the bottom of slag-returning tube 50 is connected to fluidized bed combustion indoor.Separation chamber 45 is bolted with adjustment bolt 15, described time slag baffle plate 47 is connected on adjustment bolt 15, return the elasticity slag trap 471 slag baffle plate 47 being connected with and tilting to stretch to skimming baffle 46, space between elasticity slag trap 471 and skimming baffle 46 is back slag passage, by screwing adjustment bolt 15, can make elasticity slag trap 471 near or away from skimming baffle 46, thus control back size and the speed of slag passage, maintain the granule density that fluidized bed combustion chamber is certain, keep good fluidized state.
As Fig. 5, shown in Fig. 6 and Fig. 7, economizer 7 comprises the economizer bracing frame 71 be connected in smoke evacuation hoistway 5, the many pipe row bracing frames 72 stretched economizer bracing frame 71 are equipped with, the many economizer tube 73 of roundabout bending setting many pipe row bracing frames 72 are equipped with, the two ends of economizer tube 73 be connected to into, on drain pipe, many economizer tube 73 form pipe row, the middle part of pipe row is straightway, end is bending section, the straightway of economizer tube 73 is equipped with helical blade, the end of economizer tube 73 is bending section, side guard plate 74 is housed inside the bending section of many economizer tube 73, smoke evacuation hoistway 5 is equipped with the upper guard board 75 be positioned at above economizer tube 73, the top of described side guard plate 74 is connected on upper guard board 75, deflector 76 above the bending section covering on economizer tube 73 is housed between upper guard board 75 and smoke evacuation hoistway 5 inwall.Above-mentioned pipe row bracing frame 72 comprises and being connected on economizer bracing frame 71 and the biside plate 721 be oppositely arranged, at least one installing rack 722 is housed between biside plate 721, two installing racks 722 biside plate 721 are equipped with in the present embodiment, and two installing racks 722 are arranged on the relative both sides of side plate, whole pipe row bracing frame 71 forms box structure, support more stable, installing rack 722 be provided with for economizer tube 73 through and centre expand, the spindle passing hole that upper and lower two ends are tightened up, installing rack can be formed by two pieces of plate sheet welding and be formed above by hole by mould, also can be processed to form by panel machine, above-mentioned installing rack queues the effect of flexible support to above-mentioned pipe.
The above is specific constructive form of the present utility model; the utility model is not restricted to the described embodiments; the art personnel, replace all in protection domain of the present utility model based on the equivalent variations of concrete structure on the utility model and parts.
Claims (6)
1. one kind can the CFBB of smooth combustion low heating value coal gangue, comprise boiler support (1), drum (2) boiler support (1) is equipped with, fin panel casing burner hearth (3), cyclone separator (4) and smoke evacuation hoistway (5), the top outlet flue of fin panel casing burner hearth (3) is connected with cyclone separator (4), fin panel casing burner hearth (3) interior bottom is fluidized bed combustion chamber, the bottom of fluidized bed combustion chamber is connected with a blast pipe (9), smoke evacuation hoistway (5) is provided with the superheater (6) be connected with cyclone separator (4), economizer (7) and air preheater (8), one time blast pipe (9) is connected with air feed system (10) by air preheater (8), it is characterized in that: the middle and lower part of described fin panel casing burner hearth (3) is provided with the rare close district that combines (31) of water-cooling wall, the water cooling tube at the rare close district that combines (31) place of water-cooling wall has the upper segmental arc of outside flaring from top to bottom, the lower segmental arc of vertical changeover portion and inside gradually closing, boiler support (1) is connected with the secondary air box (11) being positioned at changeover portion lower outside, the many secondary air channels (12) be periphery along fin panel casing burner hearth (8) secondary air box (11) are equipped with, each root secondary air channel (12) is connected with and penetrates from the lower segmental arc of fin panel casing burner hearth (3) and to be tilted to multiple secondary air nozzles (13) of lower setting, multiple secondary air nozzle (13) is spaced apart from top to bottom and butterfly throttle (14) is housed respectively along secondary air channel (12).
2. as claimed in claim 1 can the CFBB of smooth combustion low heating value coal gangue, it is characterized in that: described cyclone separator (4) comprises smoke-intake pipe (41), Membrane Separator Cylinder for CFB Boiler (42) and smoke exhaust pipe (43), smoke-intake pipe (41) one end is connected to fin panel casing burner hearth (3) top, the other end is connected to the top of Membrane Separator Cylinder for CFB Boiler (42) along the tangential direction of Membrane Separator Cylinder for CFB Boiler, smoke exhaust pipe (43) is connected to the top of Membrane Separator Cylinder for CFB Boiler (42) and smoke exhaust pipe (43) has the dip section (431) stretching into Membrane Separator Cylinder for CFB Boiler (42) inner chamber, the inner extending end of dip section (431) is positioned at below the center line of smoke-intake pipe (41), the axis of the axis runout Membrane Separator Cylinder for CFB Boiler (42) of dip section (431) is arranged, the bottom of Membrane Separator Cylinder for CFB Boiler (42) has top-down converging transition (421), the bottom of converging transition (421) is connected with ash releasing tube (44).
3. as claimed in claim 2 can the CFBB of smooth combustion low heating value coal gangue, it is characterized in that: described cyclone separator (4) also comprises the separation chamber (45) being connected to ash releasing tube (44) below, the skimming baffle (46) be obliquely installed is provided with in separation chamber (45), (46) are evenly equipped with multiple aperture with skimming baffle, separation chamber (45) inner chamber is separated into Hui Zha district and discharge region by skimming baffle (46), separation chamber (45) is connected with and stretches into Hui Zha district and coordinate time slag baffle plate (47) controlling back slag with skimming baffle (46), the sidepiece of separation chamber (45) is equipped with the gas discharge pipe (48) be communicated with discharge region, the dust ejector tube (49) be communicated with discharge region is equipped with in bottom, the slag-returning tube (50) be communicated with Hui Zha district is also equipped with in the bottom of separation chamber (45).
4. as claimed in claim 3 can the CFBB of smooth combustion low heating value coal gangue, it is characterized in that: described separation chamber (45) are bolted with adjustment bolt (15), described time slag baffle plate (47) is connected in adjustment bolt (15), return on slag baffle plate (47) and be connected with the elasticity slag trap (471) that skimming baffle (46) is stretched in inclination, the space between elasticity slag trap (471) and skimming baffle (46) is back slag passage.
5. according to any one of claim 1-4 can the CFBB of smooth combustion low heating value coal gangue, it is characterized in that: described economizer (7) comprises the economizer bracing frame (71) be connected in smoke evacuation hoistway (5), many pipes row's bracing frame (72) of stretching economizer bracing frame (71) are equipped with, the many economizer tube (73) of roundabout bending setting many pipes row's bracing frame (72) are equipped with, the straightway of economizer tube (73) is equipped with helical blade, the end of economizer tube (73) is bending section, side guard plate (74) is housed inside the bending section of many economizer tube (73), the upper guard board (75) being positioned at top, economizer tube (73) smoke evacuation hoistway (5) is equipped with, the top of described side guard plate (74) is connected on upper guard board (75), deflector (76) above the bending section covering on economizer tube (73) is housed between upper guard board (75) and smoke evacuation hoistway (5) inwall.
6. as claimed in claim 5 can the CFBB of smooth combustion low heating value coal gangue, it is characterized in that: described pipe row's bracing frame (72) comprises and is connected to the upper and biside plate be oppositely arranged (721) of economizer bracing frame (71), at least one installing rack (722) is housed between biside plate (721), and installing rack (722) is provided with and passes and the spindle passing hole that centre is expanded, upper and lower two ends are tightened up for economizer tube (73).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420533538.4U CN204042876U (en) | 2014-09-17 | 2014-09-17 | A kind of can the CFBB of smooth combustion low heating value coal gangue |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420533538.4U CN204042876U (en) | 2014-09-17 | 2014-09-17 | A kind of can the CFBB of smooth combustion low heating value coal gangue |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204042876U true CN204042876U (en) | 2014-12-24 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420533538.4U Expired - Fee Related CN204042876U (en) | 2014-09-17 | 2014-09-17 | A kind of can the CFBB of smooth combustion low heating value coal gangue |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN204042876U (en) |
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2014
- 2014-09-17 CN CN201420533538.4U patent/CN204042876U/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 | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20141224 Termination date: 20190917 |