CN105536531B - High/low temperature flue gas mixing arrangement and mixed method - Google Patents
High/low temperature flue gas mixing arrangement and mixed method Download PDFInfo
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- CN105536531B CN105536531B CN201610059897.4A CN201610059897A CN105536531B CN 105536531 B CN105536531 B CN 105536531B CN 201610059897 A CN201610059897 A CN 201610059897A CN 105536531 B CN105536531 B CN 105536531B
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- heat smoke
- flue gas
- low temperature
- temperature flue
- mixing arrangement
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/34—Chemical or biological purification of waste gases
- B01D53/74—General processes for purification of waste gases; Apparatus or devices specially adapted therefor
- B01D53/86—Catalytic processes
- B01D53/90—Injecting reactants
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/34—Chemical or biological purification of waste gases
- B01D53/46—Removing components of defined structure
- B01D53/54—Nitrogen compounds
- B01D53/56—Nitrogen oxides
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/34—Chemical or biological purification of waste gases
- B01D53/74—General processes for purification of waste gases; Apparatus or devices specially adapted therefor
- B01D53/86—Catalytic processes
- B01D53/8621—Removing nitrogen compounds
- B01D53/8625—Nitrogen oxides
- B01D53/8631—Processes characterised by a specific device
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
- B01F25/00—Flow mixers; Mixers for falling materials, e.g. solid particles
- B01F25/20—Jet mixers, i.e. mixers using high-speed fluid streams
- B01F25/21—Jet mixers, i.e. mixers using high-speed fluid streams with submerged injectors, e.g. nozzles, for injecting high-pressure jets into a large volume or into mixing chambers
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Environmental & Geological Engineering (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Health & Medical Sciences (AREA)
- Biomedical Technology (AREA)
- Analytical Chemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Oil, Petroleum & Natural Gas (AREA)
Abstract
High/low temperature flue gas mixing arrangement of the present invention and mixed method are related to a kind of device and method of the catalysis process purification waste gas using injection reactant.High/low temperature flue gas mixing arrangement of the present invention, include the heat smoke main pipe of an one end open, the heat smoke main pipe homonymy be connected with some be parallel to each other and the heat smoke vertical with the heat smoke main pipe distribution heat smoke dispensing branch, described heat smoke dispensing branch one end is stretched into walling of flue, some through holes are opened up on the body that the heat smoke dispensing branch is located in walling of flue, the through hole is axially distributed along heat smoke dispensing branch.Present invention also offers a kind of method that high/low temperature gas is mixed using above-mentioned mixing arrangement.The device and method of the present invention can effectively avoid larger thermograde occur in flue and thermal stress is poor, can the high temperature difference of application solutions flue gas fast and effective mixing in low temperature flue.
Description
Technical field
The present invention relates to the conventional method of purification waste gas and it is the specially designed device of this kind of method, particularly relates to
And the device and method of the catalysis process purification waste gas using injection reactant.
Background technology
Currently, in the process that denitration of boiler smoke is carried out in the whole nation, some units are between economizer and air preheater
There is no denitration space, and need to use SCR (SCR) denitrating technique by technology, Economic contrast.This just goes out
A kind of predicament is showed：About 300-400 DEG C of the active reaction temperature that the high temperature catalyst that SCR denitration uses needs, for saving coal
There is no the unit in denitration space between device and air preheater, it can arrange that the cigarette temperature of position after the deduster of denitrification apparatus is usual
At 110 DEG C -150 DEG C or so, it is impossible to meet the Applicable temperature requirement of catalyst.Therefore, some technique provides height using hot-blast stove
Warm flue gas is to heat flue gas after the deduster of low temperature, and still, how the high-temperature flue gas of hot-blast stove output makes it up to more than 800 DEG C
Safely, quickly and effectively mixed with low-temperature flue gas in low temperature flue and be related to flue gas flow field, temperature field, flue thermal stress, cigarette
A series of problems, such as road material, these problems bring very big puzzlement to enterprise's production.
The content of the invention
The technical problem to be solved in the present invention is to provide a kind of high/low temperature flue gas mixing arrangement, the device can effectively avoid cigarette
There is larger thermograde in road and thermal stress is poor, flue need not take the easily loss such as fireproof coating or laying refractory brick
Material, can the fast and effective mixing in low temperature flue of the high temperature difference flue gas of application solutions.
To solve the above problems, present invention employs following technical scheme：
High/low temperature flue gas mixing arrangement of the present invention, include the heat smoke main pipe of an one end open, the heat smoke main pipe
Homonymy is connected with some and is parallel to each other and the heat smoke dispensing branch vertical with the heat smoke main pipe, the heat smoke distribution
Branch pipe one end is stretched into walling of flue, and some through holes are opened up on the body that the heat smoke dispensing branch is located in walling of flue, described
Through hole is axially distributed along heat smoke dispensing branch.
High/low temperature flue gas mixing arrangement of the present invention, wherein the junction of the heat smoke dispensing branch and walling of flue add it is close
Seal apparatus.
High/low temperature flue gas mixing arrangement of the present invention, the heat smoke farthest apart from the openend of heat smoke main pipe distribution branch
Connected between pipe and heat smoke main pipe by curved pipe.
High/low temperature flue gas mixing arrangement of the present invention, wherein the heat smoke dispensing branch includes what is be connected with heat smoke main pipe
Extra heavy pipe and the tubule stretched into walling of flue, the extra heavy pipe are connected with tubule by expansion joint.
High/low temperature flue gas mixing arrangement of the present invention, wherein the caliber of the heat smoke main pipe is segmented from openend to the other end
Formula is successively decreased.
High/low temperature flue gas mixing arrangement of the present invention, wherein the opening position on the walling of flue close to tubule termination is provided with branch
Frame.
High/low temperature flue gas mixing arrangement of the present invention, wherein the heat smoke main pipe, heat smoke dispensing branch use resistance to height
Warm stainless steel is made.
High/low temperature flue gas mixing arrangement of the present invention, wherein the quantity of the heat smoke dispensing branch is no less than 3.
Present invention also offers a kind of method mixed using high/low temperature flue gas mixing arrangement to high/low temperature flue gas, bag
Include following steps：
A. according to high-temperature flue gas flow, temperature, pressure, flue wall area, by flow field analysis, using numerical simulation calculation
The number of heat smoke dispensing branch, the quantity of through hole, the position of through hole needed for going out；
B. close to the opening position installing support of tubule termination in walling of flue；
C. be passed through high-temperature flue gas out of heat smoke main pipe, high-temperature flue gas after the through hole outflow in heat smoke dispensing branch with
Low-temperature flue gas mixing in walling of flue.
High/low temperature flue gas mixing arrangement of the present invention is a kind of high and low temperature flue gas suitable for the high temperature difference in low temperature flue
The mixing arrangement mixed, the mixed method mixed using the device to high/low temperature gas effectively can avoid going out in flue
Existing larger thermograde and thermal stress are poor, thus need not take the rapid wear consumptive material such as fireproof coating or laying refractory brick, you can
Application solutions above-mentioned the high and low temperature flue gas that the high temperature difference be present fast and effective mixing, engineering practice in low temperature flue show this
Plant running is good.
The high/low temperature flue gas mixing arrangement and mixed method of the present invention are described further below in conjunction with the accompanying drawings.
Brief description of the drawings
Fig. 1 is the front view of the embodiment one of high/low temperature flue gas mixing arrangement of the present invention；
Fig. 2 is the top view of the embodiment one of high/low temperature flue gas mixing arrangement of the present invention；
Fig. 3 is the front view of the embodiment two of high/low temperature flue gas mixing arrangement of the present invention；
Fig. 4 is the front view of the embodiment three of high/low temperature flue gas mixing arrangement of the present invention；
Fig. 5 be high/low temperature flue gas mixing arrangement of the present invention embodiment two in operating mode 9 analog result schematic diagram；
Fig. 6 be high/low temperature flue gas mixing arrangement of the present invention embodiment two in operating mode 9 another analog result schematic diagram；
Fig. 7 be high/low temperature flue gas mixing arrangement of the present invention embodiment two in operating mode 9 another analog result schematic diagram.
Embodiment
Embodiment one：
As shown in Figure 1 and Figure 2, high/low temperature flue gas mixing arrangement of the present invention sets the heat smoke for including a lower ending opening female
Pipe 1, the opening are used to be passed through high-temperature flue gas.For the high-temperature flue gas that makes to be passed through in heat smoke main pipe 1 in uphill process flow velocity
To accelerate mixing velocity, the caliber of heat smoke main pipe 1 is successively decreased from the openend of lower end to upper end segmented for increase, i.e., heat smoke is female
Pipe 1 is divided into 3 sections from down to up, and every section of uniform diameter but every section of caliber are all higher than the caliber of its preceding paragraph.Heat smoke main pipe 1
The right side of pipe of every section of uniform diameter be welded with vertical with a heat smoke main pipe 1 heat smoke distribution heat smoke distribution branch
It is parallel to each other between 2,3 heat smoke dispensing branch 2 of pipe.To reduce heat smoke main pipe 1 and the heat smoke dispensing branch 2 on its top
Connecting portion to the resistance of air-flow, connected between the heat smoke dispensing branch 2 and heat smoke main pipe 1 at this by curved pipe 11
Connect.Heat smoke dispensing branch 2 includes the extra heavy pipe 22 being connected with heat smoke main pipe 1 by welding and the tubule stretched into walling of flue 3
23, to overcome adverse effect of the thermal stress to heat smoke dispensing branch 2, extra heavy pipe 22 and tubule 23 are connected by expansion joint 24.Heat
It is that some through holes 21 are offered on tubule 23 on the body that flue gas dispensing branch 2 is located in walling of flue 3, through hole 21 divides along heat smoke
With the axially distribution, and through hole 21 may be provided at any position of the tubule 23 along its circumferencial direction of branch pipe 2.To ensure flue gas mixing
During air-tightness, avoid gas leakage effect mixed effect, the junction of tubule 23 and walling of flue 3 adds sealing device.Enter one
Step ground, in order to prevent tubule 23 from vacantly being caused damage after stretching into walling of flue to body, close to the termination of tubule 23 on walling of flue 3
Opening position is provided with support 4, for supporting tubule 23, prevents that it is hanging sagging.To ensure flue gas mixed effect, thermal stress is avoided
The adverse effect brought, extends mixing arrangement service life, and heat smoke main pipe 1, heat smoke dispensing branch 2 use high temperature resistant not
Rust steel is made, common, and the stainless steel of resistance to 1000 degrees Celsius of high temperature above can be selected, do not enumerate herein.
It is identical with embodiment two to the method that high/low temperature flue gas is mixed using the mixing arrangement of the present embodiment, refer to down
Text.
Embodiment two：
As shown in figure 3, the present embodiment and the difference of embodiment one are, the heat smoke dispensing branch 2 of the present embodiment
It is arranged to 4.Mixed method is illustrated by taking the present embodiment as an example below, comprised the following steps that：
1. according to incoming flue gas flow, temperature, pressure, and through-flow flue is the area of walling of flue 3, using numerical simulation meter
Heat smoke dispensing branch 2 numbers, the number of openings, blowing angles are calculated, result of calculation is as follows：
A, the perforate number of the lower four heat smoke dispensing branch 2 of 9 kinds of operating modes (case) is allocated as follows table (T1, T2, T3, T4
4 heat smoke dispensing branch 2 from bottom to up along heat smoke main pipe 1 are represented respectively)：
B, different number of aperture purpose flue gases are distributed after heat smoke dispensing branch 2 carries out calculating analysis and obtains each heat smoke
The flow results of dispensing branch 2, such as following table：
By to the calculating under 9 kinds of different case, analyzing the result of calculation drawn, it can be seen that under case 9, T1
Perforate 16, T2 perforates 19, T3 perforates 19, T4 perforates 14 obtain relatively good assignment of traffic result, and its large deviations is
3.31%, assignment of traffic is uniform.Therefore, the perforate number such as following table institute of the flue gas distribution heat smoke dispensing branch 2 finally determined
Show：
C, calculated using case9 data, analyze whole flow field, check whether the wall surface temperature of walling of flue 3 meets
Design requirement, analog result is as shown in Fig. 5, Fig. 6, Fig. 7, and as seen from the figure, high-temperature flue gas does not wash away the wall of walling of flue 3, and
High/low temperature flue gas can be quickly well mixed.
2. according to above-mentioned simulation result of calculation, Pipe installing scheme is formulated, high-temperature flue gas conveyance conduit should be prevented with flue
Only directly contact, also to keep sealing.
3. according to exhaust gas volumn and flue cross section, 4 distribution heat smoke dispensing branch 2 are arranged.
It can be seen that the specific method mixed using above-mentioned mixing arrangement to high/low temperature flue gas is, according to low-temperature flue gas stream
The temperature of amount, temperature and required final flue gas, calculates and determines economical heat smoke flow, temperature and each heat smoke dispensing branch 2
Heat smoke flow.The number of openings, perforate size and angle of each heat smoke dispensing branch 2 are determined by flow field analysis, herein
Angle refers to position of the through hole 21 on the circumferencial direction of tubule 23, and it is to increase high-temperature flue gas and low-temperature flue gas to convert the angle
Mixed area.Heat smoke main pipe 1, heat smoke dispensing branch 2, through hole 21 allow high-temperature flue gas by calculating design after setting completed
In low-temperature flue gas intermediate heat transfer, wrapped up using low-temperature flue gas, completely cut off high-temperature flue gas, prevent high-temperature flue gas from directly being connect with walling of flue 3
The material of broken annular smoke flue wall 3 is touched, to ensure that the flue-gas temperature near walling of flue 3 is no more than Flue duct design temperature.
Embodiment three：
As shown in figure 4, the present embodiment and the difference of embodiment one are, the heat smoke dispensing branch 2 of the present embodiment
It is arranged to 5.It is identical with embodiment two to the method that high/low temperature flue gas is mixed using the mixing arrangement of the present embodiment, herein
Repeat no more.
In summary, mixing arrangement of the invention and the mixed method using the device can be realized high-temperature gas (temperature
Up to more than 800 DEG C) with low-temperature flue gas (such as power plant's back-end ductwork gas) it is quick, be sufficiently mixed, to reach the purpose that flue gas heats up,
SCR denitration available for flue gas after thermal power plant's deduster.
The mixing arrangement of the present invention and the beneficial effect of mixed method comprise at least：
(1) high and low temperature flue gas safety, quick, effective, uniformly mixing in low temperature flue of the high temperature difference can be realized,
Avoid larger thermograde occur in flue and thermal stress is poor；
(2) mixing arrangement and mixed method are used, flue need not take the rapid wear such as fireproof coating or laying refractory brick
Consumptive material, production cost is reduced for enterprise；
(3) mixing arrangement is small to the crushing that system increases newly, convenient for installation and maintenance, is provided a great convenience for enterprise.
Embodiment described above is only that the preferred embodiment of the present invention is described, not to the model of the present invention
Enclose and be defined, on the premise of design spirit of the present invention is not departed from, technical side of the those of ordinary skill in the art to the present invention
The various modifications and improvement that case is made, it all should fall into the protection domain of claims of the present invention determination.
Claims (9)
1. high/low temperature flue gas mixing arrangement, it is characterised in that：Include the heat smoke main pipe (1) of an one end open, the hot cigarette
Gas main pipe (1) homonymy is connected with some and is parallel to each other and the heat smoke dispensing branch vertical with the heat smoke main pipe (1)
(2), the heat smoke dispensing branch (2) includes the extra heavy pipe (22) being connected with heat smoke main pipe (1) and stretched into walling of flue (3)
Tubule (23), some tubules (23) are arranged in walling of flue (3) from top to bottom, heat smoke dispensing branch (2) position
In opening up some through holes (21) on the body in walling of flue (3), the through hole (21) is axially divided along heat smoke dispensing branch (2)
Cloth.
2. high/low temperature flue gas mixing arrangement according to claim 1, it is characterised in that：The heat smoke dispensing branch (2)
Sealing device is added with the junction of walling of flue (3).
3. high/low temperature flue gas mixing arrangement according to claim 2, it is characterised in that：Apart from the heat smoke main pipe (1)
The farthest heat smoke dispensing branch (2) and heat smoke main pipe (1) in openend between be connected by curved pipe (11).
4. high/low temperature flue gas mixing arrangement according to claim 3, it is characterised in that：The extra heavy pipe (22) and tubule (23)
Connected by expansion joint (24).
5. high/low temperature flue gas mixing arrangement according to claim 4, it is characterised in that：The pipe of the heat smoke main pipe (1)
Successively decreased from openend to other end segmented in footpath.
6. high/low temperature flue gas mixing arrangement according to claim 5, it is characterised in that：Close to thin on the walling of flue (3)
The opening position of pipe (23) termination is provided with support (4).
7. high/low temperature flue gas mixing arrangement according to any one of claim 1 to 6, it is characterised in that：The heat smoke
Main pipe (1), heat smoke dispensing branch (2) are made of high temperature resistant stainless steel.
8. high/low temperature flue gas mixing arrangement according to claim 7, it is characterised in that：The heat smoke dispensing branch (2)
Quantity be no less than 3.
9. the method mixed using the high/low temperature flue gas mixing arrangement described in claim 6 to high/low temperature flue gas, its feature
It is：Comprise the following steps：
A. according to high-temperature flue gas flow, temperature, pressure, walling of flue (3) area, by flow field analysis, using numerical simulation calculation
The number of heat smoke dispensing branch (2), the quantity of through hole (21), the position of through hole (21) needed for going out；
B. close to the opening position installing support (4) of tubule (23) termination in walling of flue (3)；
C. high-temperature flue gas is passed through out of heat smoke main pipe (1), high-temperature flue gas flows through the through hole (21) in heat smoke dispensing branch (2)
Mixed after going out with the low-temperature flue gas in walling of flue (3).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610059897.4A CN105536531B (en) | 2016-01-28 | 2016-01-28 | High/low temperature flue gas mixing arrangement and mixed method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610059897.4A CN105536531B (en) | 2016-01-28 | 2016-01-28 | High/low temperature flue gas mixing arrangement and mixed method |
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| CN105536531A CN105536531A (en) | 2016-05-04 |
| CN105536531B true CN105536531B (en) | 2018-04-03 |
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Families Citing this family (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106178935B (en) * | 2016-07-12 | 2019-01-25 | 广州同胜环保科技有限公司 | Waste gas cleaning system |
| CN106423679A (en) * | 2016-11-30 | 2017-02-22 | 湖南安普诺环保科技有限公司 | Grid injection system for flue gas denitrification |
| CN108816067B (en) * | 2018-08-06 | 2024-05-10 | 北京京诚科林环保科技有限公司 | High-temperature flue gas quick mixing device |
| CN109381997A (en) * | 2018-11-06 | 2019-02-26 | 清华大学 | A kind of flue gas temperature adjustment gametic fertility integral system |
| CN109482063A (en) * | 2018-11-15 | 2019-03-19 | 安徽威达环保科技股份有限公司 | A kind of sintering device flue gas SCR denitration concurrent heating and ammonia spray conglomerate integration device and technique |
| CN109395655A (en) * | 2018-12-14 | 2019-03-01 | 北京京诚科林环保科技有限公司 | A kind of flue gas air mixing device |
| CN109499358A (en) * | 2018-12-26 | 2019-03-22 | 福建龙净脱硫脱硝工程有限公司 | Flue gas mixing heat riser and middle low temperature SCR denitration system |
| CN114682058B (en) * | 2020-12-30 | 2023-05-26 | 中国石油化工股份有限公司 | White smoke eliminating equipment and white smoke eliminating method |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201776265U (en) * | 2010-08-05 | 2011-03-30 | 安徽龙华竹业有限公司 | Dust-removing device for large producing department |
| CN203370474U (en) * | 2013-06-25 | 2014-01-01 | 刘英聚 | Low-pressure-drop gas mixing equipment |
| CN205517273U (en) * | 2016-01-28 | 2016-08-31 | 北京龙源环保工程有限公司 | High low temperature flue gas mixing arrangement |
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2016
- 2016-01-28 CN CN201610059897.4A patent/CN105536531B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201776265U (en) * | 2010-08-05 | 2011-03-30 | 安徽龙华竹业有限公司 | Dust-removing device for large producing department |
| CN203370474U (en) * | 2013-06-25 | 2014-01-01 | 刘英聚 | Low-pressure-drop gas mixing equipment |
| CN205517273U (en) * | 2016-01-28 | 2016-08-31 | 北京龙源环保工程有限公司 | High low temperature flue gas mixing arrangement |
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