CN106196037A - A kind of external circulating system for CFB flue gas generation equipment - Google Patents

A kind of external circulating system for CFB flue gas generation equipment Download PDF

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Publication number
CN106196037A
CN106196037A CN201610763944.3A CN201610763944A CN106196037A CN 106196037 A CN106196037 A CN 106196037A CN 201610763944 A CN201610763944 A CN 201610763944A CN 106196037 A CN106196037 A CN 106196037A
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CN
China
Prior art keywords
heat
flue gas
rotary separator
generation equipment
straight
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Pending
Application number
CN201610763944.3A
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Chinese (zh)
Inventor
蔡文钢
郑军
陈金火
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Zigong Huaxi Energy Industry Co Ltd
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Zigong Huaxi Energy Industry Co Ltd
Priority date (The priority date 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 date listed.)
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Application filed by Zigong Huaxi Energy Industry Co Ltd filed Critical Zigong Huaxi Energy Industry Co Ltd
Priority to CN201610763944.3A priority Critical patent/CN106196037A/en
Publication of CN106196037A publication Critical patent/CN106196037A/en
Pending legal-status Critical Current

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Abstract

The invention discloses a kind of external circulating system for CFB flue gas generation equipment, including heat-insulating gas-solid rotary separator and be arranged on the material returning device communicated therewith bottom it and by refeed line, described heat-insulating gas-solid rotary separator main body is divided into the straight section on top and the cone section of bottom, described straight section sidepiece arranges smoke inlet, being vertically arranged central tube in described straight section, central tube upper port is exhanst gas outlet.The present invention utilizes heat-insulating gas-solid rotary separator separated by solid particulate matter and collect, and then utilizes material returning device to be conveyed and returns to rekindle in burner hearth utilization, while improving flue gas quality, also improves fuel utilization efficiency and the thermal efficiency.

Description

A kind of external circulating system for CFB flue gas generation equipment
Technical field
The present invention relates to a kind of external circulating system for CFB flue gas generation equipment, belong to technical field of combustion equipment.
Background technology
Utilize coal combustion to produce flue gas to be dried field as the CFB flue gas generation equipment of technique medium in commercial production and have And act on widely.
At present, the CFB flue gas generation equipment of domestic operation is smaller, and its capacity is typically at 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 system Powder craft is complicated, and energy consumption is higher.The equipment of ebullated bed form, uses heavy boiler setting, outside to be built into red material, and furnace wall easily rouses Wrapping, ftracture and collapse, and furnace wall is by limitation in height, general height is 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, the existing flue gas each have their own weak point of generation equipment, and be intended to improve further and perfect.
Summary of the invention
The goal of the invention of the present invention is: for the problem of above-mentioned existence, it is provided that a kind of for CFB flue gas generation equipment External circulating system, mainly solves two problems, and one is to be separated by solid particulate matter in flue gas, improves flue gas quality, and two are The solid particulate matter separated is sent back in burner hearth and utilize, improve the thermal efficiency.
The technical solution used in the present invention is such that
A kind of external circulating system for CFB flue gas generation equipment, including heat-insulating gas-solid rotary separator and be arranged on it Bottom the material returning device that communicated therewith by refeed line, described heat-insulating gas-solid rotary separator main body be divided into the straight section on top with The cone section of bottom, described straight section sidepiece arranges smoke inlet, is vertically arranged central tube in described straight section, and central tube upper port is Exhanst gas outlet.
Technique scheme utilizes heat-insulating gas-solid rotary separator separated by solid particulate matter and collect, then profit It is conveyed with material returning device and returns to burner hearth rekindles utilization, while improving flue gas quality, also improve fuel Utilization ratio and the thermal efficiency.
As preferably, described material returning device includes feed pipe, returning charge valve and discharge nozzle, described feed pipe top and heat-insulating gas Gu connect bottom rotary separator, described returning charge valve is arranged on bottom feed pipe, and installs some leading in bottom in returning charge valve Outside blast cap forms fluid bed, and described discharge nozzle connects with returning charge valve sidepiece and communicating position is higher than blast cap height.Utilize wind The fluid bed that cap is formed, blows high-pressure blast by blast cap in returning charge valve, makes the solid particulate matter of collection be in fluidized state, from And ensure that it returns to burner hearth continuously, equably and again burns.
As preferably, described material returning device is connected bottom heat-insulating gas-solid rotary separator by refeed line.Refeed line has There is certain height, the power of returning charge is provided mainly by action of gravity.Refeed line inwall needs to deal with antiseized, Yi Miangu Body particulate matter burns away in refeed line and produces coke button and be bonded in pipe.
As preferably, the wall construction of described heat-insulating gas-solid rotary separator main body is divided into fire-resistant abrasion-proof from inside to outside Layer, heat insulation layer, heat-insulation layer and metal parietal layer.Fire-resistant abrasion-proof layer is arranged and is directly contacted with high-temperature flue gas, fire-resistant the most wear-resisting;Heat insulation layer Heat is stoped outwards to transmit;Heat-insulation layer plays insulation effect.Heat-insulation layer, heat insulation layer, fire-resistant abrasion-proof layer all use the mode of pouring to manufacture, Both can guarantee that the present invention was the most properly functioning, heat can be avoided again to distribute, be conducive to improving the overall thermal efficiency of combustion gas furnace.
Accompanying drawing explanation
Fig. 1 is the structural representation of the present invention.
Fig. 2 is the structural representation of the heat-insulating gas-solid rotary separator being labeled as 2 in Fig. 1.
Fig. 3 is the structural representation of the material returning device being labeled as 4 in Fig. 1.
Labelling in figure: 1 is burner hearth, 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 by 24, and 41 is feed pipe, and 42 is returning charge valve, and 43 is blast cap, and 44 is discharging Pipe.
Detailed description of the invention
Below in conjunction with the accompanying drawings, the present invention is described in detail.
Embodiment 1:
A kind of external circulating system for CFB flue gas generation equipment, including heat-insulating gas-solid rotary separator 2 and be arranged on it Bottom the material returning device 4 communicated therewith.
Described heat-insulating gas-solid rotary separator 2 is as in figure 2 it is shown, main body is divided into the straight section 22 on top and the cone section of bottom 21, described straight section 22 sidepiece arranges smoke inlet 23, is vertically arranged central tube 24 in described straight section 22, and central tube 23 upper port is i.e. For exhanst gas outlet.Described smoke inlet 23 is from the exhanst gas outlet bleed at burner hearth 1 top, and described material returning device 4 is by consolidating of collecting Body particulate matter returns to the combustor of burner hearth 1 and again burns.
Described material returning device 4 as it is shown on figure 3, include feed pipe 41, returning charge valve 42 and discharge nozzle 44, described feed pipe 41 top Connecting with bottom heat-insulating gas-solid rotary separator 2, described returning charge valve 42 is arranged on bottom feed pipe 41, and in returning charge valve 42 Bottom is installed some blast caps 43 leading to outside and is formed fluid bed, and described discharge nozzle 44 connects with returning charge valve 42 sidepiece and connects position Set high in blast cap 43 height.
The wall construction of described heat-insulating gas-solid rotary separator 2 main body is divided into fire-resistant abrasion-proof layer, thermal insulation from inside to outside Layer, heat-insulation layer and metal parietal layer.
Embodiment 2:
As it is shown in figure 1, a kind of external circulating system for CFB flue gas generation equipment, including heat-insulating gas-solid rotary separator 2 with And it is arranged on the material returning device 4 communicated therewith bottom it and by refeed line 3.
Described heat-insulating gas-solid rotary separator 2 is as in figure 2 it is shown, main body is divided into the straight section 22 on top and the cone section of bottom 21, described straight section 22 sidepiece arranges smoke inlet 23, is vertically arranged central tube 24 in described straight section 22, and central tube 23 upper port is i.e. For exhanst gas outlet.
Described material returning device 4 as it is shown on figure 3, include feed pipe 41, returning charge valve 42 and discharge nozzle 44, described feed pipe 41 top Connecting with bottom heat-insulating gas-solid rotary separator 2, described returning charge valve 42 is arranged on bottom feed pipe 41, and in returning charge valve 42 Bottom is installed some blast caps 43 leading to outside and is formed fluid bed, and described discharge nozzle 44 connects with returning charge valve 42 sidepiece and connects position Set high in blast cap 43 height.
The wall construction of described heat-insulating gas-solid rotary separator 2 main body is divided into fire-resistant abrasion-proof layer, thermal insulation from inside to outside Layer, heat-insulation layer and metal parietal layer.

Claims (4)

1. the external circulating system for CFB flue gas generation equipment, it is characterised in that: include heat-insulating gas-solid rotary separator (2) and the material returning device (4) that is arranged on bottom it and communicates therewith, described heat-insulating gas-solid rotary separator (2) main body is divided into The straight section (22) on top and the cone section (21) of bottom, described straight section (22) sidepiece arranges smoke inlet (23), described straight section (22) Inside being vertically arranged central tube (24), central tube (23) upper port is exhanst gas outlet.
The external circulating system of a kind of CFB flue gas generation equipment the most according to claim 1, it is characterised in that: described returning charge Device (4) includes that feed pipe (41), returning charge valve (42) and discharge nozzle (44), described feed pipe (41) top rotate with heat-insulating gas-solid The connection of separator (2) bottom, described returning charge valve (42) is arranged on feed pipe (41) bottom, and installs bottom returning charge valve (42) inherence Some blast caps (43) leading to outside form fluid bed, and described discharge nozzle (44) connects and communicating position with returning charge valve (42) sidepiece Higher than blast cap (43) highly.
The external circulating system of a kind of CFB flue gas generation equipment the most according to claim 1 and 2, it is characterised in that return described in: Glassware (4) is connected with heat-insulating gas-solid rotary separator (2) bottom by refeed line (3).
The external circulating system of a kind of CFB flue gas generation equipment the most according to claim 1, rises and is characterised by: described thermal insulation The wall construction of formula gas-solid rotary separator (2) main body is divided into fire-resistant abrasion-proof layer, heat insulation layer, heat-insulation layer and metal from inside to outside Parietal layer.
CN201610763944.3A 2016-08-31 2016-08-31 A kind of external circulating system for CFB flue gas generation equipment Pending CN106196037A (en)

Priority Applications (1)

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CN201610763944.3A CN106196037A (en) 2016-08-31 2016-08-31 A kind of external circulating system for CFB flue gas generation equipment

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201610763944.3A CN106196037A (en) 2016-08-31 2016-08-31 A kind of external circulating system for CFB flue gas generation equipment

Publications (1)

Publication Number Publication Date
CN106196037A true CN106196037A (en) 2016-12-07

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Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5345896A (en) * 1993-04-05 1994-09-13 A. Ahlstrom Corporation Method and apparatus for circulating solid material in a fluidized bed reactor
CN101949535A (en) * 2010-09-28 2011-01-19 哈尔滨工业大学 Low-ratio biomass circulating fluidized bed boiler and combustion method thereof
CN201811432U (en) * 2010-09-29 2011-04-27 河北艺能锅炉有限责任公司 Heat-conduction oil boiler of recirculating fluidized bed
CN102901212A (en) * 2012-10-22 2013-01-30 哈尔滨工业大学 Low-range circulating fluidized bed water boiler for combusting inferior fuel and combustion method thereof
CN103047643A (en) * 2013-01-30 2013-04-17 哈尔滨红光锅炉总厂有限责任公司 Energy-saving type circulating fluidized bed boiler for combusting lower-calorific value fuel
CN205299508U (en) * 2016-01-26 2016-06-08 哈尔滨红光锅炉总厂有限责任公司 Environmental protection and energy saving type circulating fluidized bed boiler is with separation returning charge system
CN206094060U (en) * 2016-08-31 2017-04-12 自贡华西能源工业有限公司 A outer circulation system for CFB flue gas emergence equipment

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5345896A (en) * 1993-04-05 1994-09-13 A. Ahlstrom Corporation Method and apparatus for circulating solid material in a fluidized bed reactor
CN101949535A (en) * 2010-09-28 2011-01-19 哈尔滨工业大学 Low-ratio biomass circulating fluidized bed boiler and combustion method thereof
CN201811432U (en) * 2010-09-29 2011-04-27 河北艺能锅炉有限责任公司 Heat-conduction oil boiler of recirculating fluidized bed
CN102901212A (en) * 2012-10-22 2013-01-30 哈尔滨工业大学 Low-range circulating fluidized bed water boiler for combusting inferior fuel and combustion method thereof
CN103047643A (en) * 2013-01-30 2013-04-17 哈尔滨红光锅炉总厂有限责任公司 Energy-saving type circulating fluidized bed boiler for combusting lower-calorific value fuel
CN205299508U (en) * 2016-01-26 2016-06-08 哈尔滨红光锅炉总厂有限责任公司 Environmental protection and energy saving type circulating fluidized bed boiler is with separation returning charge system
CN206094060U (en) * 2016-08-31 2017-04-12 自贡华西能源工业有限公司 A outer circulation system for CFB flue gas emergence equipment

Non-Patent Citations (2)

* Cited by examiner, † Cited by third party
Title
《四川白马300MW循环流化床示范工程总结》编委会: "《四川白马300MW循环流化床示范工程总结》", 31 December 2007, 中国电力出版社 *
江红辉等: "《工业锅炉技术大全》", 31 December 1990, 科学普及出版社 *

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Application publication date: 20161207

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