CN208076242U - A kind of built-in flue gas sampling device suitable for SCR denitration system - Google Patents
A kind of built-in flue gas sampling device suitable for SCR denitration system Download PDFInfo
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- CN208076242U CN208076242U CN201820625597.2U CN201820625597U CN208076242U CN 208076242 U CN208076242 U CN 208076242U CN 201820625597 U CN201820625597 U CN 201820625597U CN 208076242 U CN208076242 U CN 208076242U
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Abstract
The utility model is related to a kind of built-in flue gas sampling devices suitable for SCR denitration system, including the first seal disc (1) and multiple probe tubes (8), first seal disc (1) is for blocking gaging hole and fixed probe tube (8), the probe tube (8) stretches into flue across the first seal disc (1), it is erected in flue by the holder built in SCR reactors, first seal disc (1) front surface and rear surface add divergence type fixed ring (7) respectively, the divergence type fixed ring (7) is made of a pair of of arc-shaped workpiece, inner ring is high temperature resistant elastic material, outer ring is rigid, whole positioning and locking for probe tube (8).Compared with prior art, the utility model has the characteristics of easy to manufacture and install, sealing effect is good, firm in structure, be easily achieved, light quality is durable, strong applicability；And it assembles and safeguards particularly convenient, substantially increase the working efficiency of field test personnel, reduce Labor Risk.
Description
Technical field
The utility model is related to a kind of flue gas sampling devices, are suitable for built in SCR denitration system more particularly, to a kind of
Formula flue gas sampling device.
Background technology
SCR (selective catalytic reduction) is the main stream approach of existing coal burning boiler of power station denitration technology.The prior art exists
During carrying out SCR system Optimum Experiment, performance test, needs to measure the velocity flow profile between each catalyst layer, be urged to analyze
The abrasion of agent layer, dust stratification and the escaping of ammonia situation；And measure flue gas nitrogen oxide (NOx) concentration point of each catalyst layer inlet and outlet
Cloth, so as to analysis of catalyst layer different zones catalyst activity.In order to obtain representational fume sample, cut in SCR flues
It needs to arrange a large amount of gas sampling probe according to total cross-section gridding method in face.Since SCR reactor cross-section areas are typically larger than
100m2, and with the continuous improvement of unit capacity, the cross sectional dimensions of SCR reactors also accordingly increases, the longest part of flue
Even up to 16 meters or more.Therefore, the smoke sampling pipe volume of use, weight is increasing, and is not easy plug repeatedly, so
It is proposed with the combined smoke sampling rifle of built-in multitube.In addition, the absolute altitude of SCR system is very high, the guardrail and platform of installation
The correlation test of very narrow and limited amount, SCR system does not only belong to working at height, and is limited by space, and operation is special
Inconvenience has very high work risk.
There is main problem existing for built-in smoke sampling rifle：
(1) sampled in the flue gas environment of the high dust-laden of high temperature, be easy to cause sampling gun occur block and it is worn out.Once occurring
It blocks or worn out, cannot not only find in time, it is even more impossible to ensure the exhaust gas volumn uniformity of each sample point, influence to extract flue gas sample
The representativeness of product.
(2) long-term work of smoke sampling rifle is in the environment of high temperature, and entire sampler is in addition to the portion that is exposed at outside flue
Point, surface temperature is all very high.Once needing to be maintained or replaced sampling gun, which is entirely being extracted cigarette by related personnel
It is not only difficult when road but also especially painstaking, the prodigious risk factor virtually brought to experiment work.
(3) the combined smoke sampling rifle of multitube in existing patent bundles between each stainless steel tube or same
A plane forms an entirety by welding, is sealed and positions by filling in cloth etc..The sampling gun of this kind of structure is in high temperature
When horizontally disposed in flue gas, it is most likely that because its own gravity influences, downward overall deformation, and with flue gas flow field in flue
Variation, shake back and forth, influence sampling precision and representativeness；And it is very likely even rolled over because its own gravity deforms
It is disconnected, influence the safe operation of electric power factory equipment.
Utility model content
The purpose of this utility model be exactly in order to overcome the problems of the above-mentioned prior art and provide it is a kind of it is easy to make,
Sealing effect is good, it is firm in structure, be easily achieved, light quality, durable, the convenient for disassembly and assembly SCR denitration system that is suitable for
Built-in flue gas sampling device.
The purpose of this utility model can be achieved through the following technical solutions：
A kind of built-in flue gas sampling device suitable for SCR denitration system, including the first seal disc and multiple probe tubes,
First seal disc stretches into flue for blocking gaging hole and fixed probe tube, the probe tube by the first seal disc,
The probe tube is parallel to the setting of flue cross section direction, and probe tube is erected at by the holder built in SCR reactors in flue,
The center of first seal disc is concordant with holder upper edge.
Further, the holder is the branch pipe of steam sootblower, the frame of catalyst layer or the holder added.
Further, the first seal disc front surface and rear surface add divergence type fixed ring respectively, described
Divergence type fixed ring is made of a pair of of arc-shaped workpiece, and inner ring is high temperature resistant elastic material, and outer ring is rigid, for probe tube
Whole positioning and locking.
Further, the divergence type fixed ring inner ring is polyurethane material, and outer ring is metal material.
Further, two arc-shaped workpieces of the divergence type fixed ring are respectively equipped with tapped through hole with respect to place, pass through spiral shell
Bolt locks two arc-shaped workpieces and probe tube.
Further, the device further includes the second seal disc being welded on flue wall surface, the described second sealing
It is equipped with the hole for stretching into probe tube among disk, is detachably connected between the first seal disc and the second seal disc.
Further, the probe tube be pierced by the first seal disc partial-length it is identical.
Further, the first sealing panel surface is carved with Digital ID number with steel seal, for distinguishing different measuring points.
Further, multiple probe tube arrangements are：Longest probe tube is centrally arranged, remaining length takes
Sample pipe successively arrange by both sides.
Further, the probe tube stretches into flue by the sealing hole on the first seal disc, in the sealing hole
Along equipped with for the sealing ring with the sampling seal of tube.
Compared with prior art, the utility model has the following advantages：
(1) first seal disc front surface and rear surface add divergence type fixed ring respectively, and divergence type fixed ring is by a pair
Arc-shaped workpiece is constituted, and inner ring is high temperature resistant elastic material, and outer ring is rigid, whole positioning and locking for probe tube.It should
Structure precise positioning, strong locking ability are easily installed dismounting, and will not injure probe tube；Inner ring can avoid between metal parts
Buffering and shockproof effect well are played in contact.
It is detachably connected between (2) first seal discs and the second seal disc, it is easy for installation.
(3) it is sealed by sealing ring between probe tube and the first seal disc, the contact of the first seal disc and the second seal disc
Face is sealed by asbestos washer, realizes the sealing of entire sampler.
(4) probe tube is parallel to the setting of flue cross section direction, and by the holder built in SCR reactors, (steam is blown probe tube
The branch pipe of grey device or the frame of catalyst layer or the holder added) it is mounted in flue, realize the support of ultralong overweight sampling gun
Problem prevents sagging, deformation and shakes.Probe tube is firm in structure, is unlikely to deform.
(5) longest probe tube is centrally arranged, and the probe tube of remaining length successively arrange by both sides.Such arrangement,
Entire sampler is most stable, is easy to lift.
(6) first sealing panel surfaces are carved with Digital ID number with steel seal, for distinguishing different measuring points, are convenient for experiment process
In, the correct installation of sampler, quickly positioning and maintenance is replaced, and is additionally favorable for investigating the failure of testing equipment in time.
(7) sampler described in assembles, disassembles and maintains all extremely convenient, field test personnel greatly reduce
Workload, improve the safety of field test personnel.The assembling process of entire sampler：By probe tube successively from first
The sealing hole of seal disc is slowly inserted into the gaging hole of the second seal disc, is laid on built-in holder；According to what is be determined in advance
The position of probe tube intubating length installs the divergence type fixed ring with polyurethane additional in the first seal disc front and rear surfaces.Etc. all
After probe tube all location and installations are good, bolt need to only be passed through to the screw hole of the first seal disc and the second seal disc, will entirely be sampled
Device is fixed.If it was found that some probe tube occurs wearing or deform, need replacing, only need to seal panel surface by first
Disassembling bolts, slowly extract entire sampler out sub-fraction, leak out point with polyurethane of the first seal disc rear surface
Release fixed ring.Then the separation with the polyurethane probe tube needed replacing installed in the first seal disc front and rear surfaces
Type fixed ring is removed successively, remaining slowly to extract the probe tube from the sampling pore of the first seal disc out, no
It needs to extract entire sampler out.
Description of the drawings
Fig. 1 is the structural schematic diagram of the first seal disc of the present embodiment；
Fig. 2 is the structural schematic diagram of the second seal disc of the present embodiment；
Fig. 3 is the present embodiment probe tube and the first seal disc connection diagram；
Fig. 4 (a), 4 (b) are the present embodiment divergence type fixed ring structural schematic diagram, wherein 4 (a) is front view, 4 (b) is side
View；
Fig. 5 is the present embodiment SCR denitration system and gaging hole structural schematic diagram；
Reference numeral：
1 is the first seal disc, 2 be bolt hole, 3 be sealing hole, 4 be sealing ring, 5 be identification number, 6 be the second seal disc, 7
For divergence type fixed ring, 8 be probe tube, 9 be interlayer gaging hole, 10 be catalyst layer, 11 be SCR export gaging hole.
Specific implementation mode
The utility model is described in detail in the following with reference to the drawings and specific embodiments.The present embodiment is with the utility model
Implemented premised on technical solution, gives detailed embodiment and specific operating process, but the guarantor of the utility model
Shield range is not limited to following embodiments.
Embodiment
As shown in Figures 1 to 5, a kind of built-in flue gas sampling device and its system suitable for SCR denitration system, including
First seal disc 1, bolt hole 2, sealing hole 3, sealing ring 4, identification number 5, the second seal disc 6, divergence type fixed ring 7, probe tube
8。
The length of above-mentioned probe tube 8 is determined according to flue cross section size；Probe tube 8 is parallel to flue cross section direction and sets
It sets, probe tube 8 passes through holder (branch pipe of steam sootblower or the frame of catalyst layer or the branch added built in SCR reactors
Frame) it is erected in flue, the center of the first seal disc 1 and the second seal disc 6 is consistent with holder upper edge；Each probe tube 8 is from sealing
Corresponding first seal disc 1 is run through in hole 3, and installs divergence type fixed ring 7 additional by the front and rear surfaces in the first seal disc 1, realizes
Positioning to probe tube 8 and locking function；In addition, along the sealing ring 4 being equipped with for being sealed with probe tube 8 in the sealing hole 3.
Asbestos washer is installed between first seal disc 1 and the second seal disc 6 being welded on flue wall surface, by being inserted from bolt hole 2
Enter to be bolted, to realize the sealing and fixation of entire sampling system.
The gas sampling probe 8 of flue gas sampling device is connected with corresponding each flue gas flow equalizing unit, is flowed simultaneously to flue gas
Mixing, to realize the exhaust gas volumn uniformity of each sample point；Flue gas is extracted out by gas sampling probe 8 from flue, is then led to
Flue gas flow equalizing device is crossed, flue gas, which is sent into flue gas analysis device, carries out flue gas analysis.
Preferably, the connection flexible pipe in the utility model is all made of silica gel and is made, high temperature resistant.
Preferably, the partial-length that the probe tube 8 in the utility model is pierced by the first seal disc 1 is 250mm, the other side
Length according to the high integrity of 6 outer surface of total cross-section gridding method and the second seal disc determine；The quantity of the probe tube 8 is built
View also can add probe tube according to 5 probe tubes are selected shown in Fig. 1 according to on-site actual situations.
Preferably, between the catalyst layer in the utility model gaging hole installation direction can along reactor width direction,
It can must be according to live place special case, in order to be measured as foundation along reactor depth direction, specific installation direction
Selection.
Preferably, the cross section of SCR reactor flues is divided into several homalographic units, on the corresponding flue of each unit
The second seal disc 6 and sealing flange cover is fixedly mounted, as shown in Figure 5；By spliced backing tube, be inserted into interlayer gaging hole 9 or
SCR is exported in gaging hole 11, for measuring the velocity flow profile between each catalyst layer 10, so as to the abrasion of analysis of catalyst layer 10, dust stratification
And the escaping of ammonia situation, and the NOx concentration distribution that each catalyst layer 10 is imported and exported is measured, so as to the not same district of analysis of catalyst layer 10
Domain catalyst activity.Such experiment frequency is very low, so gaging hole is often spare, need not install long-term built-in smoke sampling
System.
Preferably, the second seal disc 6 of the outlet port of third layer catalyst (counting from top to bottom) installs corresponding multitube
Combined built-in flue gas sampling device.Denitration outlet third layer catalyst outlet gaging hole effect be：
1. for measuring denitration exit flow field and NOx concentration field, to carry out optimizing and revising for ammonia-spraying grid；
2. for measuring air preheater entrance oxygen amount and inlet flue gas temperature distribution situation；
3. for measuring air preheater input static pressure, flow etc..
Above-mentioned test content is important, and the frequency of use of gaging hole is higher, therefore, it is suggested that testing gaging hole peace every one
The combined built-in flue gas sampling device of a set of multitube is filled, while being used cooperatively spliced backing tube and thermocouple, is taken into account
NOx concentration, flue gas flow rate and the measurement in temperature field.
Preferably, the position of denitration outlet (third layer catalyst outlet) gaging hole, may because being influenced by backing positions
Without platform and guardrail within the scope of installation site, it is proposed that lead to each probe tube of the combined built-in flue gas sampling device of multitube
Silicone tube is crossed, the operating position being conveniently operated is connected to.
Preferably, the positioning of the probe tube 8 of the combined flue gas sampling device of multitube in the utility model and locking function,
It is realized by installing the divergence type fixed ring 7 with polyurethane additional in the front and rear surfaces of the first seal disc 1.
Preferably, the probe tube 8 in the utility model is the seamless titanium tube of Φ 10*1.5, and material is TA2 industrially pure titaniums；
If necessary to control cost, the seamless steel pipe for using material as stainless steel 304 is also contemplated for.
Preferably, the material of the first seal disc 1 in the utility model and the second seal disc 6 is stainless steel 304.
Preferably, 7 Facing material of divergence type fixed ring in the utility model is aluminium alloy, and internal layer is polyurethane, the knot
Structure precise positioning, strong locking ability are easily installed dismounting, and will not injure probe tube 8；Built-in polyurethane can avoid metal zero
It is contacted between part, plays buffering and shockproof effect well.
Preferably, according to mode shown in Fig. 1 and Fig. 3, i.e., the sampler in the utility model is suggested in assembling
Longest probe tube 8 is preferential centrally arranged, and the probe tube 8 of remaining length successively arrange by both sides.Such arrangement, entirely
Sampler is most stable.
Preferably, the sealing ring 4 in the utility model is silica gel sealing ring, and durable, high temperature resistant is corrosion-resistant, sealing
Effect is good.
Preferably, the first sealing panel surface is carved with Digital ID number 5 with steel seal, for distinguishing different measuring points；Number mark
Know the length that number principle of establishment is the part that the first seal disc is pierced by according to probe tube, from short to long the label since 1 successively
's.Digital ID number is for distinguishing each sampled point, during experiment, the correct installation of sampler, quickly positioning and
It safeguards and replaces, be additionally favorable for investigating the failure of testing equipment in time.
Preferably, the assembling process of entire sampler：First by probe tube successively from the sealing hole 3 of the first seal disc 1,
It is slowly inserted into the gaging hole of the second seal disc 6, is laid on built-in holder；It is inserted into length according to the probe tube 8 being determined in advance
The position of degree installs divergence type fixed ring 7 additional in 1 front and rear surfaces of the first seal disc.It is good etc. all location and installations of probe tube 8
Afterwards, the screw hole 2 that bolt need to only be passed through to the first seal disc 1 and the second seal disc 6, entire sampler is fixed.
Preferably, it if finding that some probe tube 8 occurs wearing or deform, needs replacing, it only need to be by the first seal disc 1
The disassembling bolts on surface slowly extract entire sampler out sub-fraction, and the divergence type for leaking out 1 rear surface of the first seal disc is solid
Determine ring 7.Then the divergence type fixed ring 7 probe tube 8 needed replacing installed in 1 front and rear surfaces of the first seal disc is successively
It removes, remaining is exactly slowly to extract the probe tube from the sealing hole 3 of the first seal disc 1 out.
Preferably, compressed air is all periodically passed through to every probe tube 8, carries out internal sweep and deashing.
Preferably, every probe tube 8 is met and stops look into, once finding blocking, abrasion or deformation, it is carried out in time
It replaces.
Finally it should be noted that although described above carry out preferred embodiments of the present invention in conjunction with attached drawing
Description, but be not intended to limit the scope of the present invention, it is noted that those skilled in the art are come
It says, the various modifications or changes that can be made need not be made the creative labor, still in the scope of protection of the utility model.
Claims (10)
1. a kind of built-in flue gas sampling device suitable for SCR denitration system, including the first seal disc (1) and multiple probe tubes
(8), for first seal disc (1) for blocking gaging hole and fixed probe tube (8), the probe tube (8) is close by first
Closing disk (1) stretches into flue, which is characterized in that the probe tube (8) is parallel to the setting of flue cross section direction, and probe tube (8) is logical
It crosses the holder built in SCR reactors to be erected in flue, the center of the first seal disc (1) is concordant with holder upper edge.
2. a kind of built-in flue gas sampling device suitable for SCR denitration system according to claim 1, feature exist
Frame in the branch pipe, catalyst layer that, the holder is steam sootblower or the holder added.
3. a kind of built-in flue gas sampling device suitable for SCR denitration system according to claim 1, feature exist
In the first seal disc (1) front surface and rear surface add divergence type fixed ring (7) respectively, and the divergence type is solid
Determine ring (7) to be made of a pair of of arc-shaped workpiece, inner ring is high temperature resistant elastic material, and outer ring is rigid, for the whole of probe tube (8)
Body positions and locking.
4. a kind of built-in flue gas sampling device suitable for SCR denitration system according to claim 3, feature exist
In described divergence type fixed ring (7) inner ring is polyurethane material, and outer ring is metal material.
5. a kind of built-in flue gas sampling device suitable for SCR denitration system according to claim 3, feature exist
In two arc-shaped workpieces of the divergence type fixed ring (7) are respectively equipped with tapped through hole with respect to place, by bolt by two arcs
Part is locked with probe tube (8).
6. a kind of built-in flue gas sampling device suitable for SCR denitration system according to claim 1, feature exist
In the device further includes the second seal disc (6) being welded on flue wall surface, is set among second seal disc (6)
It is useful for stretching into the hole of probe tube (8), be detachably connected between the first seal disc (1) and the second seal disc (6).
7. a kind of built-in flue gas sampling device suitable for SCR denitration system according to claim 6, feature exist
In the partial-length that the probe tube (8) is pierced by the first seal disc (1) is identical.
8. a kind of built-in flue gas sampling device suitable for SCR denitration system according to claim 1, feature exist
In Digital ID number (5) is carved in the first seal disc (1) surface with steel seal, for distinguishing different measuring points.
9. a kind of built-in flue gas sampling device suitable for SCR denitration system according to claim 1, feature exist
In described multiple probe tubes (8) arrangement is：Longest probe tube (8) is centrally arranged, the probe tube (8) of remaining length
Both sides are arranged successively.
10. a kind of built-in flue gas sampling device suitable for SCR denitration system according to claim 1, feature exist
In the probe tube (8) stretches into flue, the sealing hole (3) interior edge by the sealing hole (3) on the first seal disc (1)
Equipped with the sealing ring (4) for being sealed with probe tube (8).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820625597.2U CN208076242U (en) | 2018-04-28 | 2018-04-28 | A kind of built-in flue gas sampling device suitable for SCR denitration system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820625597.2U CN208076242U (en) | 2018-04-28 | 2018-04-28 | A kind of built-in flue gas sampling device suitable for SCR denitration system |
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| Publication Number | Publication Date |
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| CN208076242U true CN208076242U (en) | 2018-11-09 |
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ID=64045092
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| CN201820625597.2U Active CN208076242U (en) | 2018-04-28 | 2018-04-28 | A kind of built-in flue gas sampling device suitable for SCR denitration system |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109696333A (en) * | 2018-04-28 | 2019-04-30 | 中电华创电力技术研究有限公司 | A kind of built-in flue gas sampling device suitable for SCR denitration system |
| CN110530684A (en) * | 2019-08-20 | 2019-12-03 | 山东中实易通集团有限公司 | A kind of boiler of power plant exhaust gas components sampler, measuring system and method |
-
2018
- 2018-04-28 CN CN201820625597.2U patent/CN208076242U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109696333A (en) * | 2018-04-28 | 2019-04-30 | 中电华创电力技术研究有限公司 | A kind of built-in flue gas sampling device suitable for SCR denitration system |
| CN109696333B (en) * | 2018-04-28 | 2024-03-19 | 中电华创电力技术研究有限公司 | Built-in flue gas sampling device suitable for SCR denitration system |
| CN110530684A (en) * | 2019-08-20 | 2019-12-03 | 山东中实易通集团有限公司 | A kind of boiler of power plant exhaust gas components sampler, measuring system and method |
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