CN103968376B - A kind of CFB Slag cooling technique - Google Patents
A kind of CFB Slag cooling technique Download PDFInfo
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- CN103968376B CN103968376B CN201310057502.3A CN201310057502A CN103968376B CN 103968376 B CN103968376 B CN 103968376B CN 201310057502 A CN201310057502 A CN 201310057502A CN 103968376 B CN103968376 B CN 103968376B
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- slag
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- cooler
- heat
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Abstract
A kind of CFB Slag cooling technique, carry out the most in the steps below: the red bottom ash of heat of (1) discharge from boiler slag removal mouth 800 DEG C～1000 DEG C, a high-temperature cooler is first passed through by slag pipe, tentatively it is cooled to the middle temperature bottom ash of 400 DEG C～500 DEG C, then, enter in barrel slag cooler；(2) middle temperature bottom ash is cooled to 130 DEG C～170 DEG C of low temperature in barrel slag cooler, and then, low temperature slag is discharged through the slag-drip opening of barrel slag cooler, then is flowed in subcolling condenser degree of depth cooling further, makes bottom ash temperature drop to 85 DEG C～100 DEG C.Present device volume is little, and heat exchange efficiency is high, and deslagging temperature is low, safe and reliable to operation, it is easy to manufacture installation and transportation, save manufacturing cost, segmentation heat exchange, reduces the heat resistance requirement of overall heat exchange component, and the life-span is long, a little repair, UTILIZATION OF VESIDUAL HEAT IN, energy-saving and emission-reduction, low cost, comprehensive utilization of resources, environmental protection, social and economic effects is notable.Can be widely applied in CFBB energy-conserving and environment-protective.
Description
Present disclosure relates to a kind of CFB Slag cooling technique, can be widely applied to CFBB joint
In energy environmental protection.
Background technology is current, and the bottom ash cooling technique of CFBB is: from boiler slag removal mouth out 800 DEG C～1000 DEG C
The red slag of heat, is entered in horizontally disposed barrel slag cooler by slag dropping tube, is then passed through cylinder cooling and the rotation of barrel slag cooler
Transferring and send, then discharged by the slag notch of barrel slag cooler, then bottom ash enters into next stage conveying equipment, carries out accumulating.Cause
The coefficient of heat transfer for existing barrel slag cooler is low, and cooling effect is poor, generally requires increase heat exchange area and exerts oneself to meet boiler slag removal
Requirement.In this condition, the most frequently used solution adds the diameter of swift often, and the length increasing cylinder meets,
Ultimately resulting in and occupy substantial amounts of boiler bottom space, and equipment volume becomes huge, accident rate also substantially increases.
Summary of the invention it is an object of the invention to provide one, and equipment volume is little, heat exchange efficiency is high, deslagging temperature is low, running safety can
Lean on, easily fabricated installation and transportation, save manufacturing cost, segmentation heat exchange, reduce overall heat exchange component heat resistance require, the life-span
Length, a little repair, UTILIZATION OF VESIDUAL HEAT IN, energy-saving and emission-reduction, low cost, comprehensive utilization of resources, environmental protection, social benefit are with economical
A kind of CFB Slag cooling technique of remarkable benefit.
In order to achieve the above object, one CFB Slag cooling technique of the present invention, carry out the most in the steps below:
(1) the red bottom ash of heat of 800 DEG C～1000 DEG C discharged from boiler slag removal mouth, first passes through a High-temperature cooling by slag pipe
Device, is tentatively cooled to the middle temperature bottom ash of 400 DEG C～500 DEG C, then, enters in barrel slag cooler；
(2) middle temperature bottom ash is cooled to 130 DEG C～170 DEG C of low temperature in barrel slag cooler, and then, low temperature slag is through drum slag cooling
The slag-drip opening of machine is discharged, then is flowed in subcolling condenser, and the further degree of depth cools down, and makes bottom ash temperature drop to 85 DEG C～100 DEG C.
One CFB Slag cooling technique of the present invention, is respectively provided with in the slag input side of barrel slag cooler and side of slagging tap
High-temperature cooler and subcolling condenser.
One CFB Slag cooling technique of the present invention, its operation principle is: utilize heat transfer and thermal-radiating principle,
Bottom ash and cooling water are inversely gone, and cooling water is sequentially by subcolling condenser → barrel slag cooler → high-temperature cooler, and bottom ash is then
Sequentially by high-temperature cooler → barrel slag cooler → subcolling condenser.So, in Multi-stage heat-exchanging device, high temperature bottom slag is with cold
But water is after countercurrent heat exchange, and hot water temperature gradually steps up, and the last hot water energy is carried utilization.
One CFB Slag cooling technique of the present invention, is to increase respectively in the slag input side of barrel slag cooler and side of slagging tap
High-temperature cooler and subcolling condenser, so, good effect of heat exchange, greatly reduce the volume of barrel slag cooler.
One CFB Slag cooling technique of the present invention, bottom ash flows to cooling water inlet coldest leg, improves coldest leg
Wall temperature, it is to avoid low-temperature-acid-corrosion.
One CFB Slag cooling technique of the present invention, bottom ash waste heat recovery, energy-saving effect is notable.Meanwhile, pass through
Bottom ash heat exchange, the substantial amounts of continuous Collision deposition of bottom ash harmful substance gets off, and is recycled, and reduces bottom ash exhaust temperature.Therefore,
Energy-saving and emission-reduction, less greenhouse effects, for preventing global warming, significant.
One CFB Slag cooling technique of the present invention, is proven, and equipment is safe and reliable to operation, does not pollute ring
Border.
One CFB Slag cooling technique of the present invention, because using Multi-stage heat-exchanging device series winding, classification heat exchange, each
The heat-exchanger rig of level, structural volume is little, it is easy to manufactures, install, transport.
One CFB Slag cooling technique of the present invention, with the single heat-exchanger rig barrel slag cooler phase in existing technique
Ratio, existing single equipment all should take high temperature resistant, anti-corrosion measure.The present invention is because using Multi-stage heat-exchanging device, segment design, root
According to the difference of temperature section, taking acid corrosion measure the most high temperature resistant, anti-, structural volume is little, segmentation heat exchange, reduces heat exchange structure
The heat resistance requirement of part, high temperature section heat-exchanger rig cost declines, and cost is substantially reduced, and heat exchange efficiency is high.
One CFB Slag cooling technique of the present invention, plural serial stage, it is easy to deashing, non-maintaining, a little repair,
Maintenance of equipment expense can be reduced, extension device service life.
One CFB Slag cooling technique of the present invention, makes full use of bottom ash waste heat heat energy, hot water reusing of energy source,
Heat exchange structure is reasonable, and heat exchange area is big, and heat exchange efficiency is high, and bottom ash temperature is substantially reduced, major part bottom ash particle deposition, reduces
Atmospheric heat pollution, bottom ash UTILIZATION OF VESIDUAL HEAT IN, energy-saving and emission-reduction.
One CFB Slag cooling technique of the present invention, a large amount of waste heats in recyclable bottom ash, the hot water energy of generation
Recycling, reduces energy waste, meanwhile, can effectively reduce the work of bottom ash temperature and blackness, beneficially boiler dust removal system,
Stop and prevent the blast that in dust pelletizing system, CO causes.
One CFB Slag cooling technique of the present invention, cooling water does not directly contact with lime-ash material, and hot water can conduct
Using energy source, activity dry ash slag byproduct directly can comprehensively utilize as construction material, meet national energy-saving reduction of discharging, UTILIZATION OF VESIDUAL HEAT IN,
Coal combustion prevention and cure of pollution industrial policy.Discarded bottom ash of making over is comprehensively utilized, and twice laid is turned waste into wealth, meanwhile,
The heat energy of the high temperature bottom slag of fusing also can be recycled utilization, i.e. high temperature bottom slag UTILIZATION OF VESIDUAL HEAT IN, it is achieved that the mesh of comprehensive utilization of resources
, beneficially environmental protection, social benefit and remarkable in economical benefits.
In sum, one CFB Slag cooling technique of the present invention, equipment volume is little, and heat exchange efficiency is high, deslagging
Temperature is low, safe and reliable to operation, it is easy to manufacture installation and transportation, saves manufacturing cost, segmentation heat exchange, reduces overall heat exchange component
Heat resistance requirement, the life-span is long, a little repair, UTILIZATION OF VESIDUAL HEAT IN, energy-saving and emission-reduction, low cost, comprehensive utilization of resources, environment protect
Protect, social benefit and remarkable in economical benefits.
The present invention is done further description below in conjunction with accompanying drawing and embodiment by accompanying drawing explanation.
Fig. 1 is the operation principle schematic diagram of the present invention.
Detailed description of the invention in FIG, one CFB Slag cooling technique of the present invention, from left to right, process equipment
It is high-temperature cooler 1, barrel slag cooler 2, subcolling condenser 3 successively；From left to right, the direction of arrow is bottom ash flow direction,
Left end is slag inlet a, and right-hand member is slag notch b；From right to left, the direction of arrow is flow of cooling water direction, and right-hand member is water inlet c,
Water return outlet d.
Embodiment 1:
One CFB Slag cooling technique of the present invention, is carried out the most in the steps below:
(1) the red bottom ash of heat of 800 DEG C discharged from boiler slag removal mouth, first passes through a high-temperature cooler by slag pipe, tentatively
It is cooled to the middle temperature bottom ash of 400 DEG C, then, enters in barrel slag cooler；
(2) middle temperature bottom ash is cooled to 130 DEG C of low temperature in barrel slag cooler, and then, low temperature slag is through the deslagging of barrel slag cooler
Mouth is discharged, then is flowed in subcolling condenser, and the further degree of depth cools down, and makes bottom ash temperature drop to 85 DEG C.
Embodiment 2:
One CFB Slag cooling technique of the present invention, is carried out the most in the steps below:
(1) the red bottom ash of heat of 1000 DEG C discharged from boiler slag removal mouth, first passes through a high-temperature cooler by slag pipe, just
Step is cooled to the middle temperature bottom ash of 500 DEG C, then, enters in barrel slag cooler；
(2) middle temperature bottom ash is cooled to 170 DEG C of low temperature in barrel slag cooler, and then, low temperature slag is through the deslagging of barrel slag cooler
Mouth is discharged, then is flowed in subcolling condenser, and the further degree of depth cools down, and makes bottom ash temperature drop to 100 DEG C.
Embodiment 3:
In order to achieve the above object, one CFB Slag cooling technique of the present invention, carry out the most in the steps below:
(1) the red bottom ash of heat of 900 DEG C discharged from boiler slag removal mouth, first passes through a high-temperature cooler by slag pipe, tentatively
It is cooled to the middle temperature bottom ash of 450 DEG C, then, enters in barrel slag cooler；
(2) middle temperature bottom ash is cooled to 150 DEG C of low temperature in barrel slag cooler, and then, low temperature slag is through the deslagging of barrel slag cooler
Mouth is discharged, then is flowed in subcolling condenser, and the further degree of depth cools down, and makes bottom ash temperature drop to 95 DEG C.
Claims (1)
1. a CFB Slag cooling technique, it is characterised in that carry out the most in the steps below:
(1) the red bottom ash of heat of 800 DEG C～1000 DEG C discharged from boiler slag removal mouth, first passes through a High-temperature cooling by slag pipe
Device, is tentatively cooled to the middle temperature bottom ash of 400 DEG C～500 DEG C, then, enters in barrel slag cooler；
(2) middle temperature bottom ash is cooled to 130 DEG C～170 DEG C of low temperature in barrel slag cooler, and then, low temperature slag is through drum slag cooling
The slag-drip opening of machine is discharged, then is flowed in subcolling condenser, and the further degree of depth cools down, and makes bottom ash temperature drop to 85 DEG C～100 DEG C.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310057502.3A CN103968376B (en) | 2013-02-06 | 2013-02-06 | A kind of CFB Slag cooling technique |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310057502.3A CN103968376B (en) | 2013-02-06 | 2013-02-06 | A kind of CFB Slag cooling technique |
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| Publication Number | Publication Date |
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| CN103968376A CN103968376A (en) | 2014-08-06 |
| CN103968376B true CN103968376B (en) | 2016-08-31 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201310057502.3A Expired - Fee Related CN103968376B (en) | 2013-02-06 | 2013-02-06 | A kind of CFB Slag cooling technique |
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Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN105382024B (en) * | 2015-11-05 | 2018-03-20 | 东南大学 | A kind of dystopy soil thermal desorption device |
| CN116287494A (en) * | 2023-03-15 | 2023-06-23 | 山西航金环保科技有限公司 | Energy-saving and environment-friendly treatment method for high-temperature liquid steel slag |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1332331A (en) * | 2001-08-16 | 2002-01-23 | 武汉都市环保工程技术股份有限公司 | Red slag cooler for circular fluidized bed boiler |
| CN1916491A (en) * | 2006-08-10 | 2007-02-21 | 上海锅炉厂有限公司 | Method for cooling bottom dregs at fluid bed boiler |
| CN101900344A (en) * | 2009-05-27 | 2010-12-01 | 刘柏谦 | Ash-slag cooling and sorting device and circulating fluidized bed boiler using same |
| WO2011063603A1 (en) * | 2009-11-30 | 2011-06-03 | 上海锅炉厂有限公司 | Connecting structure between slag dropping pipe and primary air chamber |
| CN102809150A (en) * | 2012-08-28 | 2012-12-05 | 云南电力试验研究院（集团）有限公司电力研究院 | Method for discharging slags from circulating fluidized bed boiler based on external heat exchanger |
-
2013
- 2013-02-06 CN CN201310057502.3A patent/CN103968376B/en not_active Expired - Fee Related
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1332331A (en) * | 2001-08-16 | 2002-01-23 | 武汉都市环保工程技术股份有限公司 | Red slag cooler for circular fluidized bed boiler |
| CN1916491A (en) * | 2006-08-10 | 2007-02-21 | 上海锅炉厂有限公司 | Method for cooling bottom dregs at fluid bed boiler |
| CN101900344A (en) * | 2009-05-27 | 2010-12-01 | 刘柏谦 | Ash-slag cooling and sorting device and circulating fluidized bed boiler using same |
| WO2011063603A1 (en) * | 2009-11-30 | 2011-06-03 | 上海锅炉厂有限公司 | Connecting structure between slag dropping pipe and primary air chamber |
| CN102809150A (en) * | 2012-08-28 | 2012-12-05 | 云南电力试验研究院（集团）有限公司电力研究院 | Method for discharging slags from circulating fluidized bed boiler based on external heat exchanger |
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| CN103968376A (en) | 2014-08-06 |
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