CN201582800U - Circulating fluidized bed boiler - Google Patents
Circulating fluidized bed boiler Download PDFInfo
- Publication number
- CN201582800U CN201582800U CN2009203153520U CN200920315352U CN201582800U CN 201582800 U CN201582800 U CN 201582800U CN 2009203153520 U CN2009203153520 U CN 2009203153520U CN 200920315352 U CN200920315352 U CN 200920315352U CN 201582800 U CN201582800 U CN 201582800U
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- CN
- China
- Prior art keywords
- tail gas
- combustion chamber
- yellow phosphoric
- phosphoric tail
- cfbb
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
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Abstract
The utility model relates to a circulating fluidized bed boiler, comprising a combustion chamber and an air chamber, wherein an air distributing plate is arranged between the combustion chamber and the air chamber and is assembled with an air cap; the outer wall of the combustion chamber is provided with a fireproof layer and an insulating layer in sequence; the combustion chamber is provided with a feeding port, an inspecting hole and a smoke outlet; the upper part of the combustion chamber is also provided with a yellow phosphorus tail gas conveying inlet and a secondary air conveying inlet which are communicated with the outside; the yellow phosphorus tail gas conveying inlet is connected with a yellow phosphorus tail gas conveying system; and the secondary air conveying inlet is connected with an air distributing device. The circulating fluidized bed boiler removes the generated corrosive products in the process of tail gas combustion, also can guarantee the safety of long-term operation of the boiler even adoption of the conventional material, and also can avoid the corrosive materials in smoke generated by the combustion of the yellow phosphorus tail gas, thus reducing the pollution to the environment. The circulating fluidized bed boiler realizes the safety utilization of yellow phosphorus tail gas as energy, can combust solid fuel and provide guarantee for continuous operation of the combustion when no yellow phosphorus tail gas is taken as fuel.
Description
Technical field
The utility model relates to a kind of CFBB, and especially a kind of combustion chamber of CFBB particularly a kind ofly can be used for independent buring solid fuel and also can mix the combustion chamber of burning yellow phosphoric tail gas.
Background technology
China is as phosphorus production big country, and the yellow phosphorus unit year output is about 1,500,000 tons at present, accounts for 60% of world's total amount.Along with the continuous expansion of phosphorus production scale, the phosphorus production place is tending towards concentrated, makes the yellow phosphoric tail gas of the annual discharging of China surpass 37.5 billion cubic meters.Be that the inferior fuel when dry uses as the distillation of mud phosphorus, phosphorus ore and coke with the part yellow phosphoric tail gas traditionally, all the other most yellow phosphoric tail gas emptying burnings, therefore the utilization rate of yellow phosphoric tail gas only is 20%～25% at present.The yellow phosphoric tail gas exhaust emission also is on the rise, fully utilize round yellow phosphoric tail gas, many universities and colleges, research institution mainly are to tail gas clean-up, purification, study as this technology of industrial chemicals, also obtained certain achievement, but because objectionable impurities is many in the tail gas, the purification difficulty is big, purification cost height, so this technology does not obtain promoting.
Domestic once had producer that the yellow phosphoric tail gas as fuel boiler of feeding is used, but the composition PH in the yellow phosphoric tail gas
3, H
2S, COS, CS
2, F
2After burning, produce phosphoric acid, hydrofluoric acid, SO
2Have corrosivity Deng material, and corrosivity is relevant with the wall temperature of metal, tube wall temperature is high more, and corrosivity is strong more, even surpass 250 ℃ at its wall temperature, the corrosion that also can't resist this flue gas according to the stronger 316L steel of present research resistance to corrosion.Boiler is after operation tens of hours, the perforation that is corroded of boiler pressure parts such as heating surface piping, tube sheet etc., as boiler design combustion gas routinely, coal-burning boiler the selection of material, the long life is no more than 200 hours, even select the stronger 316L steel of resistance to corrosion for use, boiler operatiopn 1 year the boiler pressure parts also can occur and be subjected to corrosion phenomenon, can't guarantee the operation of boiler long-term safety.Corrosive substance is not removed and is directly entered atmosphere in the flue gas of yellow phosphoric tail gas burning generation in addition, can't avoid the pollution to environment.Therefore yellow phosphoric tail gas will be done comprehensive utilization of energy, the key of technology and emphasis are to solve yellow phosphoric tail gas burning corrosion products to produce.
The utility model content
The purpose of this utility model is: provide a kind of conventional material make, can long-time running, safety, environmental protection, CFBB that cost is low.
The purpose of this utility model realizes by implementing following technical proposals:
A kind of CFBB, comprise combustion chamber, air compartment, be provided with air distribution plate between combustion chamber and air compartment, be fitted with blast cap on the air distribution plate, outer wall of combustion chamber is disposed with flame retardant coating, heat-insulation layer, and the combustion chamber is provided with material inlet, inspection opening, it is characterized in that, described combustion chamber also is provided with to be sent into mouthful with the yellow phosphoric tail gas of exterior and secondary wind is sent into mouth, and described yellow phosphoric tail gas is sent into and mouthful connected a yellow phosphoric tail gas induction system, and described secondary wind is sent into mouth and is connected with air distribution device.
Described yellow phosphoric tail gas induction system comprises and is arranged on the nozzle that yellow phosphoric tail gas is sent into mouthful, and the water seal arrangement that is connected with nozzle pipe, on the described connecting pipe valve is set; Water seal arrangement also is communicated with outside yellow phosphoric tail gas conveyance conduit.
Described valve comprises control valve and fast valve.
The outlet flue of described boiler tail is provided with detecting oxygen device.
Described nozzle material is the resistant and wear-resistant cast steel material.
Described nozzle material is ZGCr28Ni4Mn3n.
The position that described secondary wind is sent into mouthful is higher than yellow phosphoric tail gas and sends into mouth.
Described yellow phosphoric tail gas sends into mouth and corresponding nozzle is at least 2, and described nozzle symmetry is distributed in combustion chamber wall surface, the downward-sloping 9-11 degree of jet expansion angle.
Adopt the combustion chamber of the CFBB of above structure, can a buring solid fuel such as coal in the combustion chamber, solid fuel is sent into from material inlet, and the wind that the solid fuel fluidisation needs is sent into through air distribution plate, blast cap from air compartment, reaches the purpose of solid fuel fluidisation.When needs utilize yellow phosphoric tail gas, nozzle to combustion chamber in the air feed of yellow phosphoric tail gas by conveying device, meanwhile, the secondary wind that is positioned at nozzle top is sent into and mouthful is blown to the combustion chamber, and utilizes material inlet to add alkali solid thing such as lime stone.In the combustion process, corrosive substance and alkali solid thing generation neutralization reaction that the yellow phosphoric tail gas burning produces are thoroughly removed corrosive substance, and the high-temperature flue gas after the burning is drawn by the outlet flue on top, combustion chamber.Adopt this device, make boiler buring solid fuel separately, also yellow phosphoric tail gas and solid fuel mixed combustion can be removed the corrosive substance that the yellow phosphoric tail gas burning produces simultaneously in combustion process, avoided corrosivity boiler.During the burning operation, can open inspection door and observe the combustion chambers burn situation,, make yellow phosphoric tail gas fully completing combustion in the combustion chamber, improve efficiency of combustion by regulating yellow phosphoric tail gas amount of sending into and air distribution amount.Can also regulate the air distribution amount by the oxygen content of measuring burning back flue gas.Secondary wind is sent into mouth and is arranged at the top that yellow phosphoric tail gas is sent into mouth, makes tail gas obtain more fully burning.The yellow phosphoric tail gas induction system is provided with water seal arrangement, has played anti-backfire effect, has guaranteed the safety of tail gas induction system.
Description of drawings
Fig. 1 is the utility model example structure schematic diagram.
Fig. 2 is the A-A cutaway view of Fig. 1.
The specific embodiment
The combustion chamber of the CFBB shown in Fig. 1-2, its underpart is isobaric air compartment 1, be provided with air distribution plate 2 between combustion chamber and air compartment, be fitted with blast cap 3 on the air distribution plate, outer wall of combustion chamber is flame retardant coating 4, the heat-insulation layer 5 that coats successively, outside wall surface is provided with that material inlet 7, inspection opening 6, yellow phosphoric tail gas towards the combustion chamber sent into mouthful and secondary wind is sent into mouth, and the position that secondary wind is sent into mouthful is higher than yellow phosphoric tail gas and sends into mouth.(yellow phosphoric tail gas send into mouthful can increase according to actual needs or reduce) sent into mouthful to being distributed in 6 of combustion chamber wall surface and sent into mouthful to yellow phosphoric tail gas, each yellow phosphoric tail gas is sent into and is provided with the nozzle 8 that is connected with the water seal arrangement pipeline in the mouth, the downward-sloping 9-11 degree of jet expansion angle, nozzle material is made by the resistant and wear-resistant cast steel material, and what present embodiment adopted is the ZGCr28Ni4Mn3n material.Control valve 10 and fast valve 11 are set on the connecting pipe of nozzle and water seal arrangement 12, and water seal arrangement is communicated with outside yellow phosphoric tail gas conveyance conduit 13.Secondary wind is sent into mouth and is connected with air distribution device 9.The outlet flue 14 on top, combustion chamber is provided with detecting oxygen device.
What the utility model provided can fire the circulating fluidized bed combustor that solid fuel also can be mixed the burning yellow phosphoric tail gas separately, realized the safe utilization of yellow phosphoric tail gas as the energy, when no yellow phosphoric tail gas as fuel, can fire solid fuel separately, moving continuously for the combustion chamber provides assurance.In the yellow phosphoric tail gas combustion process, remove simultaneously the corrosion products that produces, guarantee the safety of boiler, avoid that corrosive substance directly enters atmosphere in the flue gas that the yellow phosphoric tail gas burning produces, reduced pollution environment.For the thermal hardware long-time running of exhaust combustion provides assurance, its material can be selected conventional material for use, need not select special material for use, greatly reduces investment, operation and maintenance cost is used.By the gross calorific value of consume fuel, the tail gas maximum is mixed the burning amount and is reached 70%, and exhaust combustion efficient reaches 99.5%, and the yellow phosphoric tail gas as fuel burning is achieved.
Claims (8)
1. CFBB, comprise combustion chamber, air compartment, be provided with air distribution plate between combustion chamber and air compartment, be fitted with blast cap on the air distribution plate, outer wall of combustion chamber is disposed with flame retardant coating, heat-insulation layer, and the combustion chamber has material inlet, inspection opening and outlet flue, it is characterized in that, described combustion chamber is provided with to be sent into mouthful with the yellow phosphoric tail gas of exterior and secondary wind is sent into mouth, and described yellow phosphoric tail gas is sent into and mouthful connected a yellow phosphoric tail gas induction system, and described secondary wind is sent into mouth and is connected with air distribution device.
2. CFBB as claimed in claim 1 is characterized in that: described yellow phosphoric tail gas induction system comprises and is arranged on the nozzle that yellow phosphoric tail gas is sent into mouthful, and the water seal arrangement that is connected with nozzle pipe, on the described connecting pipe valve is set; Water seal arrangement also is communicated with outside yellow phosphoric tail gas conveyance conduit.
3. CFBB as claimed in claim 2 is characterized in that: described valve comprises control valve and fast valve.
4. CFBB as claimed in claim 2 is characterized in that: the outlet flue of described boiler tail is provided with detecting oxygen device.
5. CFBB as claimed in claim 2 is characterized in that: described nozzle material is the resistant and wear-resistant cast steel material.
6. CFBB as claimed in claim 3 is characterized in that: described nozzle material is ZGCr28Ni4Mn3n.
7. as each described CFBB of claim 1-6, it is characterized in that: the position that described secondary wind is sent into mouthful is higher than yellow phosphoric tail gas and sends into mouth.
8. as each described CFBB of claim 7, it is characterized in that: described yellow phosphoric tail gas sends into mouth and corresponding nozzle is at least 2, and described nozzle symmetry is distributed in combustion chamber wall surface, the downward-sloping 9-11 degree of jet expansion angle.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009203153520U CN201582800U (en) | 2009-11-20 | 2009-11-20 | Circulating fluidized bed boiler |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009203153520U CN201582800U (en) | 2009-11-20 | 2009-11-20 | Circulating fluidized bed boiler |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201582800U true CN201582800U (en) | 2010-09-15 |
Family
ID=42724801
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2009203153520U Expired - Fee Related CN201582800U (en) | 2009-11-20 | 2009-11-20 | Circulating fluidized bed boiler |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201582800U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104832915A (en) * | 2015-01-30 | 2015-08-12 | 武汉凯迪工程技术研究总院有限公司 | Method of blending combustion of fuel coal fly ash in biomass circulating fluidized bed boiler and a device thereof |
-
2009
- 2009-11-20 CN CN2009203153520U patent/CN201582800U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104832915A (en) * | 2015-01-30 | 2015-08-12 | 武汉凯迪工程技术研究总院有限公司 | Method of blending combustion of fuel coal fly ash in biomass circulating fluidized bed boiler and a device thereof |
| CN104832915B (en) * | 2015-01-30 | 2017-05-03 | 武汉凯迪工程技术研究总院有限公司 | Method of blending combustion of fuel coal fly ash in biomass circulating fluidized bed boiler and a device thereof |
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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: 20100915 Termination date: 20171120 |