CN206094060U - A outer circulation system for CFB flue gas emergence equipment - Google Patents

A outer circulation system for CFB flue gas emergence equipment Download PDF

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Publication number
CN206094060U
CN206094060U CN201620987796.9U CN201620987796U CN206094060U CN 206094060 U CN206094060 U CN 206094060U CN 201620987796 U CN201620987796 U CN 201620987796U CN 206094060 U CN206094060 U CN 206094060U
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China
Prior art keywords
heat
returning charge
straight
rotary separator
gas
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CN201620987796.9U
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Chinese (zh)
Inventor
李�东
陈金火
蔡文钢
杨利
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Zigong Huaxi Energy Industry Co Ltd
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Zigong Huaxi Energy Industry Co Ltd
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Abstract

The utility model discloses an outer circulation system for CFB flue gas emergence equipment, pass through the returning charge ware of return material pipe rather than the intercommunication including adiabatic gas -solid rotary separator and setting in its bottom, adiabatic gas -solid rotary separator main part divide into the straight section on upper portion and the conic section of lower part, the straight section lateral part sets up the flue gas entry, the vertical center section of thick bamboo that sets up in the straight section, a center section of thick bamboo is gone up the port and is the exhanst gas outlet promptly. The utility model discloses utilize adiabatic gas -solid rotary separator to isolate the solid particle thing and collect, then utilize the returning charge ware to return its transport to to fire in the burning furnace thorax burning utilization again, when improving the flue gas quality, still improved the fuel utilization efficiency and the thermal efficiency.

Description

A kind of external circulating system that equipment occurs for CFB flue gases
Technical field
The utility model is related to a kind of external circulating system that equipment occurs for CFB flue gases, belongs to combustion apparatus technology neck Domain.
Background technology
Being dried field in industrial production as the CFB extension generation equipment of technique medium by the use of coal combustion generation flue gas has Extensive effect.
At present, the CFB flue gases generation equipment of domestic operation is all smaller, and its capacity is typically in below 20MW.Its type of furnace has The forms such as chain furnace, coal-powder boiler, fluidized bed furnace, bubbling bed.The equipment of chain furnace form, due to its fire-gate leakage coal, causes not exclusively Burning, heat loss is big, and the thermal efficiency is relatively low.The equipment of coal-powder boiler form, flying dust is difficult to collect, and flue gas quality is difficult to ensure that, and makes Powder craft is complicated, and energy consumption is higher.The equipment of ebullated bed form, using heavy boiler setting, outside is built into common brick, and furnace wall is easily roused Wrap, ftracture and collapse, and furnace wall receives height limitation, general height to be less than 15m.Bubbling bed dummy device, its velocity of flue gas is low, Bed surface area is big, it is difficult to maximize.
Therefore, there is each have their own weak point of equipment in existing flue gas, and be intended to further to improve and perfect.
Utility model content
Goal of the invention of the present utility model is:For above-mentioned problem, there is provided one kind sets for CFB flue gases Standby external circulating system, mainly solves two problems, and one is to separate solid particulate matter in flue gas, improves flue gas quality, Two is that the solid particulate matter that will be separated sends utilization in burner hearth back to, improves the thermal efficiency.
The technical solution adopted in the utility model is such:
A kind of external circulating system that equipment occurs for CFB flue gases, including heat-insulating gas-solid rotary separator and setting The material returning device communicated therewith in its bottom and by refeed line, the heat-insulating gas-solid rotary separator main body is divided into the straight of top Section and the cone section of bottom, the straight section sidepiece arranges smoke inlet, central tube, central tube upper port is vertically arranged in the straight section As exhanst gas outlet.
Solid particulate matter is separated and collected by above-mentioned technical proposal using heat-insulating gas-solid rotary separator, Ran Houli It is conveyed returns to material returning device and rekindle in burner hearth utilization, while improving flue gas quality, also improves fuel Utilization ratio and the thermal efficiency.
Preferably, the material returning device includes feed pipe, returning charge valve and discharge nozzle, the feed pipe top and heat-insulating gas Gu rotary separator bottom connects, the returning charge valve is arranged on charging bottom of the tube, and installs some leading in bottom in returning charge valve Outside blast cap forms fluid bed, and the discharge nozzle is connected with returning charge valve sidepiece and communicating position is higher than blast cap height.Using wind The fluid bed that cap is formed, high-pressure blast is blowed by blast cap into returning charge valve, makes the unburnt fuel particle of collection in fluidisation shape State, is burnt again so as to ensure that it is continuous, equably return to burner hearth.
Preferably, the material returning device is connected by refeed line with heat-insulating gas-solid rotary separator bottom.Returning charge pipe There is certain height, mainly use the power that Action of Gravity Field provides returning charge.Returning charge inside pipe wall needs to deal with antiseized, Yi Mianwei Burnt-up fuel particle burns away in refeed line and produces coke button and be bonded in pipe.
Preferably, the wall construction of the heat-insulating gas-solid rotary separator main body is divided into from inside to outside fire-resistant abrasion-proof Layer, heat insulation layer, heat-insulation layer and metal parietal layer.Fire-resistant abrasion-proof layer arrangement is directly contacted with high-temperature flue gas, and fire resisting is again wear-resisting;Heat insulation layer Heat is prevented outwards to transmit;Heat-insulation layer plays insulation effect.The employing of heat-insulation layer, heat insulation layer, fire-resistant abrasion-proof layer pours mode and manufactures, Both can guarantee that the utility model normally ran at high temperature, heat can be avoided to distribute again, and be conducive to improving the overall thermal of combustion gas furnace Efficiency.
Description of the drawings
Fig. 1 is structural representation of the present utility model.
Fig. 2 is the structural representation of the heat-insulating gas-solid rotary separator that 2 are labeled as in Fig. 1.
Fig. 3 is the structural representation of the material returning device that 4 are labeled as in Fig. 1.
Mark in figure:1 is burner hearth, and 2 is heat-insulating gas-solid rotary separator, and 3 is refeed line, and 4 is material returning device, and 21 are Cone section, 22 is straight section, and 23 is smoke inlet, cylinder centered on 24, and 41 is feed pipe, and 42 is returning charge valve, and 43 is blast cap, and 44 are discharging Pipe.
Specific embodiment
Below in conjunction with the accompanying drawings, the utility model is described in detail.
Embodiment 1:
A kind of external circulating system that equipment occurs for CFB flue gases, including heat-insulating gas-solid rotary separator 2 and setting In its bottom and the material returning device 4 that communicates therewith.
The heat-insulating gas-solid rotary separator 2 is as shown in Fig. 2 main body is divided into the straight section 22 on top and the cone section of bottom 21, the sidepiece of the straight section 22 is arranged in smoke inlet 23, the straight section 22 and is vertically arranged central tube 24, and the upper port of central tube 24 is For exhanst gas outlet.Exhanst gas outlet bleed of the smoke inlet 23 from the top of burner hearth 1, the material returning device 4 will be collected not Burnt-up fuel particle returns to the combustion chamber of burner hearth 1 and is burnt again.
The material returning device 4 is as shown in figure 3, including feed pipe 41, returning charge valve 42 and discharge nozzle 44, the top of the feed pipe 41 Connect with the bottom of heat-insulating gas-solid rotary separator 2, the returning charge valve 42 is arranged in the bottom of feed pipe 41, and returning charge valve 42 Bottom is installed some blast caps 43 for leading to outside and forms fluid bed, and the discharge nozzle 44 connects and connect position with the sidepiece of returning charge valve 42 Put higher than the height of blast cap 43.
The wall construction of the main body of heat-insulating gas-solid rotary separator 2 is divided into from inside to outside fire-resistant abrasion-proof layer, thermal insulation Layer, heat-insulation layer and backplate layer.
Embodiment 2:
As shown in figure 1, a kind of external circulating system that equipment occurs for CFB flue gases, including heat-insulating gas-solid rotating separation Device 2 and the material returning device 4 for being arranged on its bottom and being communicated therewith by refeed line 3.
The heat-insulating gas-solid rotary separator 2 is as shown in Fig. 2 main body is divided into the straight section 22 on top and the cone section of bottom 21, the sidepiece of the straight section 22 is arranged in smoke inlet 23, the straight section 22 and is vertically arranged central tube 24, and the upper port of central tube 24 is For exhanst gas outlet.
The material returning device 4 is as shown in figure 3, including feed pipe 41, returning charge valve 42 and discharge nozzle 44, the top of the feed pipe 41 Connect with the bottom of heat-insulating gas-solid rotary separator 2, the returning charge valve 42 is arranged in the bottom of feed pipe 41, and returning charge valve 42 Bottom is installed some blast caps 43 for leading to outside and forms fluid bed, and the discharge nozzle 44 connects and connect position with the sidepiece of returning charge valve 42 Put higher than the height of blast cap 43.
The wall construction of the main body of heat-insulating gas-solid rotary separator 2 is divided into from inside to outside fire-resistant abrasion-proof layer, thermal insulation Layer, heat-insulation layer and metal parietal layer.

Claims (4)

1. it is a kind of for CFB flue gases occur equipment external circulating system, it is characterised in that:Including heat-insulating gas-solid rotary separator (2)And it is arranged on its bottom and the material returning device for communicating therewith(4), the heat-insulating gas-solid rotary separator(2)Main body is divided into The straight section on top(22)With the cone section of bottom(21), the straight section(22)Sidepiece arranges smoke inlet(23), the straight section(22) Inside it is vertically arranged central tube(24), central tube(24)Upper port is exhanst gas outlet.
2. there is the external circulating system of equipment in a kind of CFB flue gases according to claim 1, it is characterised in that:The returning charge Device(4)Including feed pipe(41), returning charge valve(42)And discharge nozzle(44), the feed pipe(41)Top rotates with heat-insulating gas-solid Separator(2)Bottom connects, the returning charge valve(42)Installed in feed pipe(41)Bottom, and returning charge valve(42)Install inherent bottom Some blast caps for leading to outside(43)Form fluid bed, the discharge nozzle(44)With returning charge valve(42)Sidepiece is connected and communicating position Higher than blast cap(43)Highly.
3. there is the external circulating system of equipment in a kind of CFB flue gases according to claim 1 and 2, it is characterised in that:It is described to return Glassware(4)By refeed line(3)With heat-insulating gas-solid rotary separator(2)Bottom connects.
4. there is the external circulating system of equipment in a kind of CFB flue gases according to claim 1, rises and is characterised by:The thermal insulation Formula gas-solid rotary separator(2)The wall construction of main body is divided into from inside to outside fire-resistant abrasion-proof layer, heat insulation layer, heat-insulation layer and metal Parietal layer.
CN201620987796.9U 2016-08-31 2016-08-31 A outer circulation system for CFB flue gas emergence equipment Active CN206094060U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201620987796.9U CN206094060U (en) 2016-08-31 2016-08-31 A outer circulation system for CFB flue gas emergence equipment

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201620987796.9U CN206094060U (en) 2016-08-31 2016-08-31 A outer circulation system for CFB flue gas emergence equipment

Publications (1)

Publication Number Publication Date
CN206094060U true CN206094060U (en) 2017-04-12

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106196037A (en) * 2016-08-31 2016-12-07 自贡华西能源工业有限公司 A kind of external circulating system for CFB flue gas generation equipment
CN107420888A (en) * 2017-08-10 2017-12-01 郑州中鼎锅炉股份有限公司 A kind of high low speed CFBB

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106196037A (en) * 2016-08-31 2016-12-07 自贡华西能源工业有限公司 A kind of external circulating system for CFB flue gas generation equipment
CN107420888A (en) * 2017-08-10 2017-12-01 郑州中鼎锅炉股份有限公司 A kind of high low speed CFBB

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