CN108489283A - System and method for recovering cooling waste heat of high-temperature flue gas containing liquid ash - Google Patents
System and method for recovering cooling waste heat of high-temperature flue gas containing liquid ash Download PDFInfo
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- CN108489283A CN108489283A CN201810193774.9A CN201810193774A CN108489283A CN 108489283 A CN108489283 A CN 108489283A CN 201810193774 A CN201810193774 A CN 201810193774A CN 108489283 A CN108489283 A CN 108489283A
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- low
- temperature flue
- fume
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- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 title claims abstract description 197
- 239000003546 flue gas Substances 0.000 title claims abstract description 197
- 239000007788 liquid Substances 0.000 title claims abstract description 91
- 239000002918 waste heat Substances 0.000 title claims abstract description 42
- 238000001816 cooling Methods 0.000 title claims abstract description 31
- 238000000034 method Methods 0.000 title claims abstract description 27
- 239000000428 dust Substances 0.000 claims abstract description 78
- 239000007789 gas Substances 0.000 claims abstract description 62
- 238000011084 recovery Methods 0.000 claims abstract description 36
- 239000002893 slag Substances 0.000 claims abstract description 20
- 239000003517 fume Substances 0.000 claims description 95
- 235000019504 cigarettes Nutrition 0.000 claims description 32
- 239000011261 inert gas Substances 0.000 claims description 25
- 239000000779 smoke Substances 0.000 claims description 15
- 238000002844 melting Methods 0.000 claims description 13
- 230000008018 melting Effects 0.000 claims description 13
- 238000010926 purge Methods 0.000 claims description 11
- 238000004062 sedimentation Methods 0.000 claims description 6
- 238000004220 aggregation Methods 0.000 claims description 5
- 230000002776 aggregation Effects 0.000 claims description 5
- 230000005494 condensation Effects 0.000 claims description 4
- 238000009833 condensation Methods 0.000 claims description 4
- 238000004519 manufacturing process Methods 0.000 claims description 4
- 239000000203 mixture Substances 0.000 claims description 4
- 239000005416 organic matter Substances 0.000 claims description 4
- 230000005484 gravity Effects 0.000 claims description 3
- 239000002699 waste material Substances 0.000 claims description 3
- 238000004064 recycling Methods 0.000 claims description 2
- 230000032696 parturition Effects 0.000 claims 1
- 230000009467 reduction Effects 0.000 abstract description 3
- 230000000903 blocking effect Effects 0.000 description 6
- 230000000694 effects Effects 0.000 description 5
- 230000004888 barrier function Effects 0.000 description 4
- 230000007613 environmental effect Effects 0.000 description 3
- 238000002156 mixing Methods 0.000 description 3
- 229910000831 Steel Inorganic materials 0.000 description 2
- 238000004880 explosion Methods 0.000 description 2
- 239000002737 fuel gas Substances 0.000 description 2
- 239000010959 steel Substances 0.000 description 2
- 238000009628 steelmaking Methods 0.000 description 2
- 238000003723 Smelting Methods 0.000 description 1
- 230000009471 action Effects 0.000 description 1
- 230000004913 activation Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000007664 blowing Methods 0.000 description 1
- 239000003245 coal Substances 0.000 description 1
- 239000000571 coke Substances 0.000 description 1
- 238000004939 coking Methods 0.000 description 1
- 238000009749 continuous casting Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000002440 industrial waste Substances 0.000 description 1
- 230000001737 promoting effect Effects 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 238000005096 rolling process Methods 0.000 description 1
- 238000003756 stirring Methods 0.000 description 1
- 239000013589 supplement Substances 0.000 description 1
- 239000002912 waste gas Substances 0.000 description 1
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F27—FURNACES; KILNS; OVENS; RETORTS
- F27D—DETAILS OR ACCESSORIES OF FURNACES, KILNS, OVENS, OR RETORTS, IN SO FAR AS THEY ARE OF KINDS OCCURRING IN MORE THAN ONE KIND OF FURNACE
- F27D17/00—Arrangements for using waste heat; Arrangements for using, or disposing of, waste gases
- F27D17/004—Systems for reclaiming waste heat
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F22—STEAM GENERATION
- F22D—PREHEATING, OR ACCUMULATING PREHEATED, FEED-WATER FOR STEAM GENERATION; FEED-WATER SUPPLY FOR STEAM GENERATION; CONTROLLING WATER LEVEL FOR STEAM GENERATION; AUXILIARY DEVICES FOR PROMOTING WATER CIRCULATION WITHIN STEAM BOILERS
- F22D1/00—Feed-water heaters, i.e. economisers or like preheaters
- F22D1/02—Feed-water heaters, i.e. economisers or like preheaters with water tubes arranged in the boiler furnace, fire tubes, or flue ways
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23G—CREMATION FURNACES; CONSUMING WASTE PRODUCTS BY COMBUSTION
- F23G7/00—Incinerators or other apparatus for consuming industrial waste, e.g. chemicals
- F23G7/06—Incinerators or other apparatus for consuming industrial waste, e.g. chemicals of waste gases or noxious gases, e.g. exhaust gases
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F27—FURNACES; KILNS; OVENS; RETORTS
- F27D—DETAILS OR ACCESSORIES OF FURNACES, KILNS, OVENS, OR RETORTS, IN SO FAR AS THEY ARE OF KINDS OCCURRING IN MORE THAN ONE KIND OF FURNACE
- F27D17/00—Arrangements for using waste heat; Arrangements for using, or disposing of, waste gases
-
- 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
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P10/00—Technologies related to metal processing
- Y02P10/25—Process efficiency
Landscapes
- Engineering & Computer Science (AREA)
- Environmental & Geological Engineering (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Chimneys And Flues (AREA)
Abstract
A system and a method for recovering cooling waste heat of high-temperature flue gas containing liquid ash comprise a high-temperature flue gas inlet pipeline, a mixed flue gas dust remover, a slag outlet, a low-temperature flue gas circulating gas inlet pipeline, a low-temperature flue gas circulating fan, a low-temperature circulating flue gas branch pipe, an economizer, a medium-temperature flue gas outlet pipeline and a low-temperature flue gas outlet. The invention starts from the heat energy utilization angle, high-temperature flue gas containing liquid ash is cooled to medium temperature through gas circulation, after the liquid ash is removed, waste heat in the gas is recovered through a waste heat recovery mode, on one hand, the utilization rate of energy is improved, and the purposes of energy saving and emission reduction are achieved, on the other hand, the technical problems that the low-melting-point liquid ash is condensed on the heat exchange surface of the economizer, the heat exchange efficiency is reduced, a pipeline is blocked, and even accidents happen in serious cases are solved.
Description
Technical field
The present invention relates to a kind of heat energy recovering method, specifically a kind of cooling high-temperature fume waste heat containing liquid ash returns
The System and method for of receipts, belongs to field of energy utilization.
Background technology
The UTILIZATION OF VESIDUAL HEAT IN of industrial waste gas especially hot industry exhaust gas, be improve economy, fuel-saving one it is important
Approach fully recycles and utilizes these energy, is one of the mark of modernization of business degree.Smelter is from raw material, coking, burning
It ties and generates the largely exhaust gas containing available energy in the production process of ironmaking, steel-making, continuous casting and steel rolling, hot industry is useless
Gas contains a large amount of thermal energy, but often contains liquid ash in these high-temp waste gas, such as steelmaking converter, electric furnace raw coke oven gas.If
Liquid ash is not removed, high-temperature gas, which is directly entered heat exchanger, which carries out waste heat recovery, can stick and be changed in heat exchanger after liquid ash condensation
On hot face, increase flow resistance, reduce heat exchange efficiency, can result in blockage when serious, or even the safety accidents such as explosion occur.Cause
This, it is necessary to UTILIZATION OF VESIDUAL HEAT IN will be carried out again after the liquid ash removing in high-temperature flue gas.After the liquid ash removing in high-temperature flue gas
Waste heat is carried out again, and the efficient utilization of energy may be implemented, improve the reliability of system, play the role of promoting what is beneficial and abolish what is harmful.
Invention content
In view of the above technical problems, the present invention propose a kind of system of the cooling high-temperature fume waste heat recovery containing liquid ash and
Method.
A kind of system of the cooling high-temperature fume waste heat recovery containing liquid ash, including high-temperature flue gas entry pipeline, mixed cigarette remove
Dirt device, slag notch, low temperature cigarette circulating air entrance pipe, low-temperature flue gas circulating fan, low-temperature circulating flue gas branch pipe, economizer, in
Warm exhanst gas outlet pipeline and low-temperature flue gas outlet；
The middle part of the mixed fume and dust device is equipped with high-temperature flue gas access port, high-temperature flue gas entry pipeline and high-temperature flue gas access port phase
It is logical；The mixed fume and dust device is vertically set up according to gravity, is mixed fume and dust device top and is equipped with medium temperature exhanst gas outlet, medium temperature smoke outlet tube
Road is communicated by medium temperature exhanst gas outlet with mixed fume and dust device；Mixed fume and dust device lower part is equipped with slag notch, and slag notch accesses waste residue and receives
Collecting system；Mixed fume and dust device middle and lower part is equipped with low-temperature circulating smoke inlet pipeline access port, and low temperature cigarette circulating air entrance pipe is logical
Low temperature cigarette circulating air entrance pipe access port is crossed to communicate with mixed fume and dust device；
It is equipped with economizer in the medium temperature exhanst gas outlet pipeline, after medium temperature exhanst gas outlet pipeline is by economizer, is divided into two-way, one
Low-temperature flue gas outlet is accessed on road, and another way accesses low-temperature circulating flue gas branch pipe；
The low temperature cigarette circulating air entrance pipe is additionally provided with low-temperature flue gas circulating fan with low-temperature circulating flue gas branch pipe joint.
It is further preferred that further including start and stop vehicle inert gas purge system, at the high-temperature flue gas entry line entry
Equipped with inert gas access port, the start and stop vehicle inert gas purge system accesses high-temperature flue gas by inert gas access port and enters
Mouth pipeline.
It is further preferred that further including burning torch, the tail end that the burning torch is located at medium temperature exhanst gas outlet pipeline is low
On front side of warm exhanst gas outlet.In addition, burning torch is optional within the system, if in flue gas there are fuel gas if must use
Burning torch, by the flame of combustor, by the low-temperature flue gas oxygenolysis containing organic matter at the H of environmental sound2O and CO2.
If can be saved without fuel gas, burning torch in flue gas.
It is further preferred that the low-temperature circulating wind turbine, outlet is removed by low-temperature circulating smoke inlet pipeline and mixed cigarette
Dirt device is connected, and the angle between the radial direction of low-temperature circulating entrance pipe and the radial direction of mixed fume and dust device is 30-50 degree.
Low-temperature circulating smoke inlet pipeline can be that a pipeline can also be multi-pipeline parallel connection.Ensure in mixed fume and dust
Device internal face forms layer of cold gas, and ash can not reach wall surface in liquid condition.
It is further preferred that into the high-temperature flue gas entry pipeline high-temperature flue gas Celsius temperature at 1200 degree or more,
Low-temperature circulating flue gas becomes medium temperature flue gas in mixed fume and dust device after impingement mix high-temperature flue gas, medium temperature flue-gas temperature is reduced to
800-900 degrees Celsius, less than the liquidus curve of the liquid ash of low melting point, the liquid ash in medium temperature flue gas coagulates in mixed fume and dust device
Knot, aggregation, sedimentation, are finally discharged from slag notch.
It is further preferred that after medium temperature flue gas is by economizer, temperature drops to 200 DEG C hereinafter, becoming by 800-900 degrees Celsius
For low-temperature flue gas.
The present invention also proposes a kind of method of the cooling high-temperature fume waste heat recovery containing liquid ash, includes the following steps：
The first step, 1200 degrees Celsius or more of high-temperature flue gas containing liquid is entered by high-temperature flue gas entry pipeline mixes fume and dust device, together
When, low-temperature circulating flue gas is entered by low temperature cigarette circulating air entrance pipe mixes fume and dust device, low-temperature circulating flue gas and high temperature containing liquid
Flue gas mixes, and then generates the medium temperature flue gas that temperature is 800-900 degrees Celsius, the liquid ash in medium temperature flue gas is in mixed fume and dust device
Middle condensation, aggregation, sedimentation, are finally discharged from slag notch；
Second step, the medium temperature flue gas that low-temperature circulating flue gas generates after being mixed with high-temperature flue gas containing liquid are preheated by economizer
Recycling, after medium temperature flue gas is by economizer, temperature drops to 200 DEG C hereinafter, becoming low-temperature flue gas from 800-900 degrees Celsius；
Third walks, and after medium temperature flue gas becomes low-temperature flue gas by economizer, is divided into two-way, a-road-through crosses low temperature exhanst gas outlet row
Go out, another way is then followed by low temperature under the siphonage of low-temperature flue gas circulating fan into low-temperature circulating flue gas branch pipe
Enter mixed fume and dust device after ring wind turbine, low temperature cigarette circulating air entrance pipe to be mixed with high-temperature flue gas containing liquid.
It is further preferred that further including the steps that high-temperature flue gas containing liquid is mixed with inert gas in the first step, in height containing liquid
Before warm flue gas enters mixed fume and dust device, inert gas feeding high-temperature flue gas is made by inertia using start and stop vehicle inert gas purge system
Gas is mixed with high-temperature flue gas, is used for production safety, is prevented gas burst.
It is further preferred that in third step, further includes burning torch, low-temperature flue gas is become by economizer in medium temperature flue gas
Afterwards by low-temperature flue gas outlet discharge all the way in, be additionally provided with burning torch, will be containing the low of organic matter by the flame of combustor
Warm flue gas oxygenolysis at environmental sound H2O and CO2.
It is further preferred that in second step, low-temperature circulating flue gas is by low temperature cigarette circulating air entrance pipe to be removed with mixed cigarette
The angle of dirt device diameter 30-50 degree enters obliquely mixes fume and dust device.
Advantageous effect：
The present invention becomes medium temperature from heat energy utilization angle, by the high-temperature flue gas containing liquid ash by gas circulation cooling, will
After liquid ash removes, then by the waste heat in waste heat recovery mode gas recovery, the utilization rate of the energy is on the one hand improved, is reached
On the other hand the purpose of energy-saving and emission-reduction also solves low melting point liquid ash and is condensed on the heat-transfer surface of economizer, reduce heat exchange effect
The technical barrier of accident even occurs when serious for rate, blocking pipeline.
Description of the drawings
Fig. 1 is the cooling high-temperature fume residual neat recovering system structural schematic diagram of the invention containing liquid ash；
Fig. 2 is the method and step figure of the cooling high-temperature fume waste heat recovery of the invention containing liquid ash.
Specific implementation mode
Embodiment 1：As shown in Figure 1, a kind of system of the cooling high-temperature fume waste heat recovery containing liquid ash, including high temperature cigarette
Gas entrance pipe 1 mixes fume and dust device 2, slag notch 3, low temperature cigarette circulating air entrance pipe 4, low-temperature flue gas circulating fan 5, low temperature
Circulating flue gas branch pipe 6, economizer 7, medium temperature exhanst gas outlet pipeline 8 and low-temperature flue gas outlet 9；
The middle part of the mixed fume and dust device 2 is equipped with high-temperature flue gas access port 10, and high-temperature flue gas entry pipeline 1 is accessed with high-temperature flue gas
Mouth 10 communicates；The mixed fume and dust device 2 is vertically set up according to gravity, and it is in " Shen " font to mix fume and dust device 2, and central space is big, both ends
Space is small.Mixed 2 top of fume and dust device is equipped with medium temperature exhanst gas outlet 11, and medium temperature exhanst gas outlet pipeline 8 passes through medium temperature exhanst gas outlet 11
It is communicated with mixed fume and dust device 2；Mixed 2 lower part of fume and dust device is equipped with slag notch 3, and slag notch 3 accesses waste residue collection system；Mixed fume and dust
2 middle and lower part of device is equipped with low-temperature circulating smoke inlet pipeline access port 12, and low temperature cigarette circulating air entrance pipe 4 is recycled by low temperature cigarette
Gas entrance pipe access port 12 is communicated with mixed fume and dust device；Further, it is gone back in low temperature cigarette circulating air entrance pipe access port 12
It is covered equipped with visiting, to prevent low melting point liquid ash from entering low temperature cigarette circulating air entrance pipe 4.
Economizer 7 is equipped in the medium temperature exhanst gas outlet pipeline 8, after medium temperature exhanst gas outlet pipeline 8 is by economizer 7, point
For two-way, low-temperature flue gas outlet 9 is accessed all the way, another way accesses low-temperature circulating flue gas branch pipe 6；
The low temperature cigarette circulating air entrance pipe 4 is additionally provided with low-temperature flue gas circulating fan with 6 joint of low-temperature circulating flue gas branch pipe
5。
It is further preferred that further including start and stop vehicle inert gas purge system 13,1 entrance of high-temperature flue gas entry pipeline
Place is equipped with inert gas access port 14, and the start and stop vehicle inert gas purge system 13 accesses height by inert gas access port 14
Warm smoke inlet pipeline 1.
It is further preferred that further including burning torch 15, the burning torch 15 is located at the tail of medium temperature exhanst gas outlet pipeline 8
Hold 9 front side of low-temperature flue gas outlet.
It is further preferred that the low-temperature circulating wind turbine 5, outlet passes through low-temperature circulating smoke inlet pipeline 4 and mixed cigarette
Deduster 2 is connected, and the angle between the radial direction of low-temperature circulating entrance pipe 4 and the radial direction of mixed fume and dust device 2 is 30-50 degree.
Low-temperature circulating smoke inlet pipeline can be that a pipeline can also be multi-pipeline parallel connection.Ensure in mixed fume and dust device internal face
Layer of cold gas is formed, ash can not reach wall surface in liquid condition.
It is further preferred that into the high-temperature flue gas entry pipeline 1 high-temperature flue gas Celsius temperature at 1200 degree or more,
Low-temperature circulating flue gas becomes medium temperature flue gas in mixed fume and dust device 2 after impingement mix high-temperature flue gas, medium temperature flue-gas temperature is reduced to
800-900 degrees Celsius, less than the liquidus curve of the liquid ash of low melting point, the liquid ash in medium temperature flue gas coagulates in mixed fume and dust device 2
Knot, aggregation, sedimentation, are finally discharged from slag notch, are condensed on the heat-transfer surface of economizer to solve low melting point liquid ash,
Heat exchange efficiency is reduced, the technical barrier of accident even occurs when serious for blocking pipeline.
It is further preferred that after medium temperature flue gas is by economizer 7, temperature by 800-900 degrees Celsius drop to 200 DEG C hereinafter,
Become low-temperature flue gas.
Embodiment 2, as shown in Fig. 2,
The present invention also proposes a kind of method of the cooling high-temperature fume waste heat recovery containing liquid ash, includes the following steps：
The first step, 1200 degrees Celsius or more of high-temperature flue gas containing liquid is entered by high-temperature flue gas entry pipeline mixes fume and dust device, together
When, low-temperature circulating flue gas is entered by low temperature cigarette circulating air entrance pipe mixes fume and dust device, low-temperature circulating flue gas and high temperature containing liquid
Flue gas mixes, and then generates the medium temperature flue gas that temperature is 800-900 degrees Celsius, the liquid ash in medium temperature flue gas is in mixed fume and dust device
Middle condensation, aggregation, sedimentation, are finally discharged from slag notch；Liquid ash in medium temperature flue gas condenses in mixed fume and dust device 2, is poly-
Collection, sedimentation, are finally discharged from slag notch, are condensed on the heat-transfer surface of economizer to solve low melting point liquid ash, reduce
The technical barrier of accident even occurs when serious for heat exchange efficiency, blocking pipeline.
Second step, the medium temperature flue gas that low-temperature circulating flue gas generates after being mixed with high-temperature flue gas containing liquid are carried out by economizer
Pre- recuperation of heat, after medium temperature flue gas is by economizer, temperature drops to 200 DEG C hereinafter, becoming low-temperature flue gas from 800-900 degrees Celsius；
Third walks, and after medium temperature flue gas becomes low-temperature flue gas by economizer, is divided into two-way, a-road-through crosses low temperature exhanst gas outlet row
Go out, another way is then followed by low temperature under the siphonage of low-temperature flue gas circulating fan into low-temperature circulating flue gas branch pipe
Enter mixed fume and dust device after ring wind turbine, low temperature cigarette circulating air entrance pipe to be mixed with high-temperature flue gas containing liquid.
It is further preferred that further including the steps that high-temperature flue gas containing liquid is mixed with inert gas in the first step, in height containing liquid
Before warm flue gas enters mixed fume and dust device, inert gas feeding high-temperature flue gas is made by inertia using start and stop vehicle inert gas purge system
Gas is mixed with high-temperature flue gas, is used for production safety, is prevented gas burst.
It is further preferred that in third step, further includes burning torch, low-temperature flue gas is become by economizer in medium temperature flue gas
Afterwards by low-temperature flue gas outlet discharge all the way in, be additionally provided with burning torch, will be containing the low of organic matter by the flame of combustor
Warm flue gas oxygenolysis at environmental sound H2O and CO2.
It is further preferred that in second step, low-temperature circulating flue gas is by low temperature cigarette circulating air entrance pipe to be removed with mixed cigarette
The angle of dirt device diameter 30-50 degree enters obliquely mixes fume and dust device.Low-temperature circulating smoke inlet pipeline can be a pipeline
It can be multi-pipeline parallel connection.Ensure to form layer of cold gas in mixed fume and dust device internal face, ash can not reach wall surface in liquid condition.
Embodiment 3：A kind of high-temperature gas is described in detail in the present embodiment combination Fig. 1（Containing liquid）Cool down waste heat recovery
Method, the case that high temperature flue gas waste heat recovery containing liquid is made steel in conjunction with certain l illustrate implementation step.
Steel-smelting electric furnace exiting flue gas is at 1200 DEG C, the liquid dust containing low melting point in flue gas.
The waste heat recovery of high-temperature flue gas is directly carried out, low melting point liquid ash can condense on the heat-transfer surface of economizer 7, reduce
Heat exchange efficiency, and can blocking pipeline, even occur accident when serious.
A kind of high-temperature gas（Containing liquid）The method of cooling waste heat recovery, activation system start inert blowing gas first
System 13 is swept, wherein by inert gas supplement high-temperature gas, system safety is ensured into the step, avoids explosion.
1200 DEG C of high-temperature flue gas, which enters, mixes fume and dust device 2, and temperature drops to 800 DEG C -900 DEG C, is less than the liquid of low melting point
Ash liquidus curve, at this time the liquid ash in flue gas condense, assemble, settle in mixed fume and dust device 2, finally arranged from slag notch 3
Go out.
800 DEG C -900 DEG C of medium temperature flue gas waste heat in economizer 7 is recycled, and 200 DEG C of low-temperature flue gas is from economizer 7
Discharge.
Above-mentioned low-temperature flue gas is divided into two-way after the discharge of economizer 7, all the way from 9 discharge of low-temperature flue gas outlet, into chimney
Or enter smoke processing system etc..
Above-mentioned low-temperature flue gas another way is by low-temperature flue gas loop branch pipe 6, under the action of low-temperature flue gas circulating fan 5 tiltedly
Fume and dust device 2 is mixed to entering, is most preferably that 30-50 degree, low temperature cigarette circulating air entrance pipe access port are opposite obliquely high obliquely
Warm flue gas access port 10, this set, on the one hand, low-temperature circulating flue gas is enabled to be blown against high-temperature flue gas access port so that
Mixed gas generates vortex in mixed fume and dust device 2, enhances the circulation of high-temperature flue gas, and mixed effect and cooling-down effect,
Liquid ash in medium temperature flue gas condenses in mixed fume and dust device, assembles, effect of settling is good.On the other hand, in mixed fume and dust device 2
The liquid ash and dust being attached on mixed 2 inner wall of fume and dust device can also be purged by generating vortex, prevent low melting point liquid ash from existing
The condensed on inner walls of mixed fume and dust device 2, blocking pipeline.Low-temperature circulating smoke inlet pipeline can be that a pipeline can also be more
Pipeline is in parallel.Ensure to form layer of cold gas in mixed fume and dust device internal face, ash can not reach wall surface in liquid condition.
To which above-mentioned low-temperature flue gas enters the high-temperature flue gas mixing that after mixed fume and dust device and high-temperature flue gas entry 1 enters and stirs
It mixes, roll, carry out acutely orderly heat exchange, realize the purpose of cooling high-temperature fume dedusting.
The present invention is from heat energy utilization angle, by the hot industry exhaust gas containing liquid ash, after mixing cooling, removes liquid
Ash carries out waste heat recovery after becoming medium temperature gas, on the one hand improves the utilization rate of the energy, achieve energy-saving and emission reduction purposes, separately
On the one hand, it also solves low melting point liquid ash to condense on the heat-transfer surface of economizer, reduction heat exchange efficiency, blocking pipeline, seriously
When the technical barrier of accident even occurs.The present invention provides a kind of high-temperature gas（Containing liquid）The method of cooling waste heat recovery, first
By high-temperature flue gas by mixing cool-down method, the liquid ash of low melting point is removed, then carry out waste heat recovery, gone after profits and advoided disadvantages, improved
The utilization rate of the energy.
Embodiment 4：As shown in Figure 1, the present invention provides a kind of high-temperature gas（Containing liquid）The method of cooling waste heat recovery, method
Involved in device include：High-temperature flue gas entry pipeline 1, start and stop vehicle inert gas purge system 13 mix fume and dust device 2, slag tap
Mouth 3, low temperature cigarette circulating air entrance pipe 4, low-temperature flue gas circulating fan 5, low-temperature circulating flue gas branch pipe 6, economizer 7, medium temperature cigarette
Gas export pipeline 8, burning torch 15, low-temperature flue gas outlet 9.
A kind of high-temperature gas（Containing liquid）Cool down the method for waste heat recovery, and this method is by the same low-temperature circulating of high-temperature flue gas
Flue gas mixes cooling, and liquid ash condenses into solid-state, and solid-state ash is from the discharge of slag notch 3 in mixed fume and dust device, and medium temperature flue gas is into province
Coal device 7 carries out waste heat recovery.
A kind of high-temperature gas（Containing liquid）Cool down waste heat recovery method, this method in order to realize high-temperature flue gas drop
System Back-end low-temperature flue gas is introduced with low-temperature flue gas circulating fan 5 and is mixed fume and dust device 2 by temperature.
A kind of high-temperature gas（Containing liquid）The method of cooling waste heat recovery, the outlet of low-temperature circulating wind turbine 5 pass through low temperature
Circulating flue gas pipeline 4 is connected with mixed fume and dust device 2, radial 30 ° of the holding-of the radial direction of low-temperature circulating pipeline 4 and mixed fume and dust device 2
50 ° of angles.Low-temperature circulating smoke inlet pipeline can be that a pipeline can also be multi-pipeline parallel connection.Ensure in mixed fume and dust
Device internal face forms layer of cold gas, and ash can not reach wall surface in liquid condition.
A kind of high-temperature gas（Containing liquid）Cool down the method for waste heat recovery, installs on high-temperature flue gas entry pipeline 1 and opens
Parking inert gas purge system.
A kind of high-temperature gas（Containing liquid）The method of cooling waste heat recovery, low-temperature flue gas export and are equipped with burning at 9
Torch 15.
A kind of high-temperature gas（Containing liquid）The method of cooling waste heat recovery, 7 front end of economizer goes out with mixed fume and dust device 2
Mouth is connected, and its rear end is divided into two-way, is discharged all the way from chimney, and another way passes through low-temperature flue gas circulating fan 5 and introduces mixed fume and dust
Device 2.
Claims (10)
1. a kind of system of the cooling high-temperature fume waste heat recovery containing liquid ash, it is characterised in that：Including high-temperature flue gas entry pipe
Road, mixed fume and dust device, slag notch, low temperature cigarette circulating air entrance pipe, low-temperature flue gas circulating fan, low-temperature circulating flue gas branch pipe,
Economizer, medium temperature exhanst gas outlet pipeline and low-temperature flue gas outlet；
The middle part of the mixed fume and dust device is equipped with high-temperature flue gas access port, high-temperature flue gas entry pipeline and high-temperature flue gas access port phase
It is logical；The mixed fume and dust device is vertically set up according to gravity, is mixed fume and dust device top and is equipped with medium temperature exhanst gas outlet, medium temperature smoke outlet tube
Road is communicated by medium temperature exhanst gas outlet with mixed fume and dust device；Mixed fume and dust device lower part is equipped with slag notch, and slag notch accesses waste residue and receives
Collecting system；Mixed fume and dust device middle and lower part is equipped with low-temperature circulating smoke inlet pipeline access port, and low temperature cigarette circulating air entrance pipe is logical
Low temperature cigarette circulating air entrance pipe access port is crossed to communicate with mixed fume and dust device；
It is equipped with economizer in the medium temperature exhanst gas outlet pipeline, after medium temperature exhanst gas outlet pipeline is by economizer, is divided into two-way, one
Low-temperature flue gas outlet is accessed on road, and another way accesses low-temperature circulating flue gas branch pipe；
The low temperature cigarette circulating air entrance pipe is additionally provided with low-temperature flue gas circulating fan with low-temperature circulating flue gas branch pipe joint.
2. the system of the cooling high-temperature fume waste heat recovery according to claim 1 containing liquid ash, it is characterised in that：Also wrap
Start and stop vehicle inert gas purge system is included, inert gas access port is equipped at the high-temperature flue gas entry line entry, it is described to open
Inert gas purge system of stopping accesses high-temperature flue gas entry pipeline by inert gas access port.
3. the system of the cooling high-temperature fume waste heat recovery according to claim 1 containing liquid ash, it is characterised in that：Also wrap
Burning torch is included, the burning torch is located at the tail end low-temperature flue gas outlet front side of medium temperature exhanst gas outlet pipeline.
4. the system of the cooling high-temperature fume waste heat recovery according to claim 1 containing liquid ash, it is characterised in that：It is described
Low-temperature circulating wind turbine, outlet are connected by low-temperature circulating smoke inlet pipeline with mixed fume and dust device, low-temperature circulating inlet tube
Angle between the radial direction on road and the radial direction of mixed fume and dust device is 30-50 degree.
5. the system of the cooling high-temperature fume waste heat recovery according to claim 1 containing liquid ash, it is characterised in that：Into
The high-temperature flue gas Celsius temperature of the high-temperature flue gas entry pipeline is at 1200 degree or more, and low-temperature circulating flue gas is in mixed fume and dust device
Become medium temperature flue gas after impingement mix high-temperature flue gas, medium temperature flue-gas temperature is reduced to 800-900 degrees Celsius, is less than the liquid of low melting point
The liquidus curve of state ash, the liquid ash in medium temperature flue gas are condensed in mixed fume and dust device, assemble, are settled, finally arranged from slag notch
Go out.
6. the system of the cooling high-temperature fume waste heat recovery according to claim 1 containing liquid ash, it is characterised in that：Medium temperature
After flue gas is by economizer, temperature drops to 200 DEG C hereinafter, becoming low-temperature flue gas from 800-900 degrees Celsius.
7. a kind of method of the cooling high-temperature fume waste heat recovery containing liquid ash, it is characterised in that include the following steps：
The first step, 1200 degrees Celsius or more of high-temperature flue gas containing liquid is entered by high-temperature flue gas entry pipeline mixes fume and dust device, together
When, low-temperature circulating flue gas is entered by low temperature cigarette circulating air entrance pipe mixes fume and dust device, low-temperature circulating flue gas and high temperature containing liquid
Flue gas mixes, and then generates the medium temperature flue gas that temperature is 800-900 degrees Celsius, the liquid ash in medium temperature flue gas is in mixed fume and dust device
Middle condensation, aggregation, sedimentation, are finally discharged from slag notch；
Second step, the medium temperature flue gas that low-temperature circulating flue gas generates after being mixed with high-temperature flue gas containing liquid are preheated by economizer
Recycling, after medium temperature flue gas is by economizer, temperature drops to 200 DEG C hereinafter, becoming low-temperature flue gas from 800-900 degrees Celsius；
Third walks, and after medium temperature flue gas becomes low-temperature flue gas by economizer, is divided into two-way, a-road-through crosses low temperature exhanst gas outlet row
Go out, another way is then followed by low temperature under the siphonage of low-temperature flue gas circulating fan into low-temperature circulating flue gas branch pipe
Enter mixed fume and dust device after ring wind turbine, low temperature cigarette circulating air entrance pipe to be mixed with high-temperature flue gas containing liquid.
8. the method for the cooling high-temperature fume waste heat recovery according to claim 7 containing liquid ash, it is characterised in that：First
Further include the steps that high-temperature flue gas containing liquid is mixed with inert gas in step, before high-temperature flue gas containing liquid enters and mixes fume and dust device, adopts
Inert gas is set to be mixed with high-temperature flue gas inert gas feeding high-temperature flue gas with start and stop vehicle inert gas purge system, for giving birth to
Production safety, prevents gas burst.
9. the method for the cooling high-temperature fume waste heat recovery according to claim 7 containing liquid ash, it is characterised in that：Third
Further include burning torch in step, passes through low-temperature flue gas outlet discharge after medium temperature flue gas becomes low-temperature flue gas by economizer
In all the way, be additionally provided with burning torch, by the flame of combustor, by the pairs of environment of low-temperature flue gas oxygenolysis containing organic matter without
Harmful H2O and CO2。
10. the method for the cooling high-temperature fume waste heat recovery according to claim 7 containing liquid ash, it is characterised in that：The
In two steps, low-temperature circulating flue gas is by low temperature cigarette circulating air entrance pipe with oblique with the angle of mixed fume and dust device diameter 30-50 degree
It is upper to enter mixed fume and dust device.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810193774.9A CN108489283A (en) | 2018-03-09 | 2018-03-09 | System and method for recovering cooling waste heat of high-temperature flue gas containing liquid ash |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201810193774.9A CN108489283A (en) | 2018-03-09 | 2018-03-09 | System and method for recovering cooling waste heat of high-temperature flue gas containing liquid ash |
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| CN108489283A true CN108489283A (en) | 2018-09-04 |
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| CN201810193774.9A Pending CN108489283A (en) | 2018-03-09 | 2018-03-09 | System and method for recovering cooling waste heat of high-temperature flue gas containing liquid ash |
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