CN107051028A - A kind of outer flue gas ash collecting device of flue - Google Patents
A kind of outer flue gas ash collecting device of flue Download PDFInfo
- Publication number
- CN107051028A CN107051028A CN201710249772.2A CN201710249772A CN107051028A CN 107051028 A CN107051028 A CN 107051028A CN 201710249772 A CN201710249772 A CN 201710249772A CN 107051028 A CN107051028 A CN 107051028A
- Authority
- CN
- China
- Prior art keywords
- flue
- collection
- gas
- collecting device
- flue gas
- Prior art date
- Legal status (The legal status 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 status listed.)
- Pending
Links
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 title claims abstract description 45
- 239000003546 flue gas Substances 0.000 title claims abstract description 45
- 239000007789 gas Substances 0.000 claims abstract description 28
- 239000000428 dust Substances 0.000 claims abstract description 26
- 239000003517 fume Substances 0.000 claims abstract description 14
- 239000000779 smoke Substances 0.000 claims abstract description 11
- 238000000034 method Methods 0.000 claims abstract description 5
- 239000000498 cooling water Substances 0.000 claims description 12
- 235000019504 cigarettes Nutrition 0.000 claims description 9
- 238000001816 cooling Methods 0.000 claims description 3
- 239000004744 fabric Substances 0.000 claims description 3
- 230000000717 retained effect Effects 0.000 claims description 3
- 238000011160 research Methods 0.000 abstract description 3
- 239000002956 ash Substances 0.000 description 19
- 238000005070 sampling Methods 0.000 description 11
- QAOWNCQODCNURD-UHFFFAOYSA-N Sulfuric acid Chemical compound OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 description 10
- 239000003245 coal Substances 0.000 description 4
- 238000005260 corrosion Methods 0.000 description 3
- 230000007797 corrosion Effects 0.000 description 3
- 244000144985 peep Species 0.000 description 3
- 238000001556 precipitation Methods 0.000 description 3
- 230000008901 benefit Effects 0.000 description 2
- 239000010881 fly ash Substances 0.000 description 2
- 238000009434 installation Methods 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- 238000010521 absorption reaction Methods 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 238000009833 condensation Methods 0.000 description 1
- 230000005494 condensation Effects 0.000 description 1
- 238000005536 corrosion prevention Methods 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 238000003912 environmental pollution Methods 0.000 description 1
- 239000000686 essence Substances 0.000 description 1
- 230000008676 import Effects 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 238000010248 power generation Methods 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 238000012546 transfer Methods 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D46/00—Filters or filtering processes specially modified for separating dispersed particles from gases or vapours
- B01D46/02—Particle separators, e.g. dust precipitators, having hollow filters made of flexible material
- B01D46/023—Pockets filters, i.e. multiple bag filters mounted on a common frame
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D46/00—Filters or filtering processes specially modified for separating dispersed particles from gases or vapours
- B01D46/42—Auxiliary equipment or operation thereof
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D46/00—Filters or filtering processes specially modified for separating dispersed particles from gases or vapours
- B01D46/42—Auxiliary equipment or operation thereof
- B01D46/4218—Influencing the heat transfer which act passively, e.g. isolations, heat sinks, cooling ribs
Landscapes
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Chimneys And Flues (AREA)
Abstract
The present invention relates to flue gas ash collecting device and method outside a kind of flue.The outer flue gas ash collecting device of flue that the present invention is provided includes the grey section of smoke inlet, gas fume valve, heat exchanging segment, collection, blower fan and exhanst gas outlet, and the wherein grey section of gas fume valve, heat exchanging segment, collection and blower and pipeline is connected in turn between smoke inlet and exhanst gas outlet.The outer flue gas ash collecting device of flue that the present invention is provided can reduce the temperature of flue gas residing for flying dust, and the flying dust under relatively low flue-gas temperature can be collected for use in scientific research.
Description
Technical field
Received the present invention relates to field of thermal power, more particularly to a kind of flue gas flying dust for thermal power station's boiler back end ductwork
Acquisition means and method.
Background technology
At present, coal fired power generation is still the most important generation mode of China, and its generated energy accounts for China's gross generation
More than 70%.In thermal power plant, as one of burning of coal product, flying dust is the important component of boiler tail flue gas, to cigarette
Flying dust in gas carries out such as particle size of fly ash, elemental composition, material and constitutes physicochemical analysis, to carrying out coal analysis, burning
Analysis, boiler flue corrosion prevention, dust removal design and environmental protection all have very important significance.
The premise analyzed flying dust is that collection is sampled to flue gas flying dust, and current Fly ash sampling mode is mainly divided
For two classes.One class collection device is fixedly mounted in flue, and sample tap is opened in staff's timing, and collection is taken out from sample tap
Ash-pit, the sampling period is generally one day or half a day, and the advantage of this sampling mode is that sampling is convenient, and staff need not use
Any optional equipment can just complete sampling, and sampling amount is big, disclosure satisfy that a variety of analysis demands, has the disadvantage underaction, because
Equipment is fixedly mounted in flue, and sample position is fixed, and this collection device is generally located on air preheater entrance and air
Preheater outlet port, this flue-gas temperature at two is respectively at 300 DEG C and 150 DEG C or so.Another kind of collection device is portable
Sampler is conventional such as parallel-sampling instrument.This kind of device is not fixedly attached in flue, therefore relatively flexible with sampling
The characteristics of, the position that peep hole is provided with every flue can be carried out sampling, but it still has that sample position is limited to be lacked
Point, could only be sampled in the position for being provided with peep hole.In general, the flue-gas temperature into deduster is general on 130 DEG C of left sides
The right side, which kind of sampling mode can not all obtain the feature of flying dust contained by less than 130 DEG C of flue gas.
Because the sulfuric acid vapor contained in flue gas can condense precipitation below 150 DEG C, this is to cause flue and heat exchange element
The major reason of corrosion.Meanwhile, the sulfuric acid of precipitation also interacts with flying dust, physical absorption and chemical reaction due to flying dust,
So that sulfuric acid corrosion change is extremely complex.Under different flue-gas temperatures, sulfuric acid amount of precipitation is different, and the sulfuric acid interacted with flying dust is total
Amount is also different, causes flying dust to show different physicochemical properties.Therefore, in less than 150 DEG C of a variety of not equalities of temperature
The flying dust of degree is sampled analysis respectively, has great importance for research flue gas low-temperature condensation characteristic and corrosion regularity.
However, the collection device of the above all has the shortcomings that as follows, i.e., it can not reduce the environment temperature of gathered flying dust.Such as
Preceding described, the collection device of fixed installation is normally at before and after air preheater, the flue-gas temperatures of the two positions at 300 DEG C and
150 DEG C or so；It is due to that flue peep hole aperture position is consolidated although carrying out flying dust collection relatively flexibly using parallel-sampling instrument
It is fixed, it can not also gather after the flying dust of various temperature, particularly air preheater, typically can not find the sight that cigarette temperature is less than 135 DEG C
Examine hole.
Low-pressure coal saver is arranged on after air preheater, and its import cigarette temperature is general at 150 DEG C -135 DEG C, and it exports cigarette temperature
100 DEG C or so are reduced to sometimes, in order to gather flying in even lower cigarette temperature environment in 100 DEG C -150 DEG C this temperature ranges
Ash is studied, it is necessary to a kind of new flue gas ash collecting device.
The content of the invention
1st, the invention technical problem to be solved：To overcome above-mentioned technical problem, it is contemplated that carrying
For flue gas ash collecting device and method outside a kind of flue, its flue-gas temperature residing for taken ash sample can be cooled after again
Progress takes ash manipulation.
2nd, the technical scheme of its technical problem use is solved：
A kind of outer flue gas ash collecting device of flue, including the grey section of smoke inlet, gas fume valve, heat exchanging segment, collection, blower fan and
Exhanst gas outlet, wherein gas fume valve, heat exchanging segment, the grey section of collection and blower and pipeline are connected to smoke inlet and exhanst gas outlet in turn
Between.
The outer flue gas flying dust collection method of a kind of flue, it is characterised in that comprise the following steps：Step 1: by above-mentioned flue
Outer flue gas ash collecting device is connected on the outside of the flue after boiler air preheater；Step 2: opening cooling water valve, then
Gas fume valve and blower fan are opened, the temperature indicating value of temperature sensor is recorded；Step 3: after running ten minutes, closing gas fume valve
And blower fan, it is then shut off cooling water valve；Step 4: after after the outer flue gas ash collecting device natural cooling of flue, pulling down collection ash
The ash retained in section, collecting dust-removing cloth bag.
3rd, have the advantage that compared with prior art：
The outer flue gas ash collecting device of flue that the present invention is provided, can obtain the flying dust in relatively low flue-gas temperature, can be with
Flying dust under different flue-gas temperatures is collected for use in research.
Brief description of the drawings
Fig. 1 show the structural representation of the embodiment of the present invention.
Embodiment
Fig. 1 show the structural representation of the embodiment of the present invention
As shown in figure 1, the flue gas ash collecting device that the present embodiment is provided is located at outside flue, smoke inlet 1, cigarette are included
The grey section 4 of air valve 2, heat exchanging segment 3, collection, blower fan 5 and exhanst gas outlet 6, the wherein grey section 4 of gas fume valve 2, heat exchanging segment 3, collection and blower fan 5
It is connected in turn by pipeline between smoke inlet 1 and exhanst gas outlet 6.
Heat exchanging segment 3 includes heat exchanger tube 31, heat exchange piece housing 32 and cooling water valve 33, and heat exchange piece housing 32 is typically used
Rectangular shape, heat exchanger tube 31 is snakelike to be arranged in heat exchange piece housing 32, and cooling water valve 33 is located at the water inlet end of heat exchanger tube 31.
In work, heat exchanger tube 31 is constantly passed through cooling water, for flue gas cool-down, to be obtained in the grey section 4 of collection below in relatively low
Flying dust in cigarette temperature environment.The openings of sizes of cooling water valve 33 is adjusted, the inflow of heat exchanger tube 31 can be controlled, so as to obtain
Different heat transfer effects, reaches that regulation heat exchanging segment 3 exports the purpose of cigarette temperature, under obtaining in different flue-gas temperature environment
Flying dust.In order to prevent the encrustation of heat exchanger tube 31, demineralized water in factory can be used as the source of cooling water.
The grey section 4 of collection includes setting inside the grey section outlet 42 of the grey section entrance 41 of collection, collection and the grey piece housing 44 of collection, the grey piece housing 44 of collection
It is equipped with dust-removal cloth-bag 43 and temperature sensor 45.The grey section entrance 41 of collection and the grey section outlet 42 of collection are connected by flange and pipeline respectively
Connect, be easy to dismounting；Dust-removal cloth-bag 43 can filter the flying dust in flue gas, for flying dust collection.Temperature sensor 45 is used to record
Flue-gas temperature residing for collected ash sample.
During installation, whole device is arranged along flow of flue gas direction, and smoke inlet 1 and exhanst gas outlet 6 are preheated with boiler air
Back-end ductwork after device is connected in parallel, and smoke inlet 1 is located at the high-pressure side of boiler flue, and exhanst gas outlet 6 is located at boiler flue
Low-pressure side.If the flue gas taken out from flue is directly discharged in air, because boiler back end ductwork is in negative pressure state,
By flue gas extract out flue need to overcome flue internal negative pressure, it is necessary to power of fan it is very big；Simultaneously as exhaust gas temperature
Higher, there is also unsafe factor.The outside that the present invention is designed takes apparatus for ash to be connected the low wind side of exhanst gas outlet 6 and flue, and one
Aspect can to take apparatus for ash entrance and exit to have natural pressure difference, and the requirement to power of fan is substantially reduced, the opposing party
Face, although the present invention takes apparatus for ash for outside, flue gas is still within closed system, reduces unsafe factor, also not
Environmental pollution can be caused.
When taking ash, gas fume valve 2 and blower fan 5 are opened, cooling water valve 33 is then opened, flue gas is in the presence of blower fan 5
Runner is formed outside flue, the grey section 4 of smoke inlet 1, gas fume valve 2, heat exchanging segment 3, collection, blower fan 5 and exhanst gas outlet 6 is sequentially passed through
Turn again to inside flue.Flying dust in the grey section 4 of collection, flue gas is filtered and stayed in cloth bag by dust-removal cloth-bag 43.10 points of operation
Zhong Hou, closes cooling water valve 33, is then shut off blower fan 5 and gas fume valve 2, right after removing the grey section 4 of collection after whole device cooling
The ash retained in dust-removal cloth-bag 43 is collected.
The foregoing is merely illustrative of the preferred embodiments of the present invention, is not intended to limit the invention, all essences in the present invention
God is with principle, and any modification, equivalent substitution and improvements done etc. should be included within the scope of protection of the invention.
Claims (5)
1. a kind of outer flue gas ash collecting device of flue, including the grey section of smoke inlet, gas fume valve, heat exchanging segment, collection, blower fan and cigarette
Gas is exported, wherein gas fume valve, heat exchanging segment, the grey section of collection and blower and pipeline be connected in turn smoke inlet and exhanst gas outlet it
Between.
2. the outer flue gas ash collecting device of flue as claimed in claim 1, it is characterised in that the heat exchanging segment includes heat exchange
Pipe, heat exchange piece housing and cooling water valve.
3. the outer flue gas ash collecting device of flue as claimed in claim 1, it is characterised in that the grey section of the collection includes the grey section of collection
The grey section outlet of entrance, collection, dust-removal cloth-bag, the grey piece housing of collection and temperature sensor.
4. the outer flue gas ash collecting device of flue as claimed in claim 1, it is characterised in that the grey section entrance of the collection and collection ash
Section outlet is connected by flange with pipeline respectively.
5. the outer flue gas flying dust collection method of a kind of flue, it is characterised in that comprise the following steps：
Step 1: flue gas ash collecting device outside the flue described in claim 1-4 is connected to after boiler air preheater
On the outside of flue；
Step 2: opening cooling water valve, gas fume valve and blower fan are then opened, the temperature indicating value of temperature sensor is recorded；
Step 3: after running ten minutes, closing gas fume valve and blower fan, being then shut off cooling water valve；
Step 4: after after the outer flue gas ash collecting device natural cooling of flue, pulling down what is retained in the grey section of collection, collecting dust-removing cloth bag
Ash.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710249772.2A CN107051028A (en) | 2017-04-17 | 2017-04-17 | A kind of outer flue gas ash collecting device of flue |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710249772.2A CN107051028A (en) | 2017-04-17 | 2017-04-17 | A kind of outer flue gas ash collecting device of flue |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN107051028A true CN107051028A (en) | 2017-08-18 |
Family
ID=59600057
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710249772.2A Pending CN107051028A (en) | 2017-04-17 | 2017-04-17 | A kind of outer flue gas ash collecting device of flue |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN107051028A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112246028A (en) * | 2020-09-24 | 2021-01-22 | 莫清翔 | Pulse type bag dust collector |
| CN112933752A (en) * | 2021-01-26 | 2021-06-11 | 大唐淮北发电厂 | Flue gas filtering and purifying device for vacuum filter |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112246028A (en) * | 2020-09-24 | 2021-01-22 | 莫清翔 | Pulse type bag dust collector |
| CN112933752A (en) * | 2021-01-26 | 2021-06-11 | 大唐淮北发电厂 | Flue gas filtering and purifying device for vacuum filter |
| CN112933752B (en) * | 2021-01-26 | 2022-04-22 | 大唐淮北发电厂 | Flue gas filtering and purifying device for vacuum filter |
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