CN106124707B - Detecting device for paper mill boiler wet desulphurization flue gas - Google Patents
Detecting device for paper mill boiler wet desulphurization flue gas Download PDFInfo
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- CN106124707B CN106124707B CN201610597857.5A CN201610597857A CN106124707B CN 106124707 B CN106124707 B CN 106124707B CN 201610597857 A CN201610597857 A CN 201610597857A CN 106124707 B CN106124707 B CN 106124707B
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- flue gas
- inner layer
- gas sampling
- flue
- tube wall
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N33/00—Investigating or analysing materials by specific methods not covered by groups G01N1/00 - G01N31/00
- G01N33/0004—Gaseous mixtures, e.g. polluted air
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N15/00—Investigating characteristics of particles; Investigating permeability, pore-volume, or surface-area of porous materials
- G01N15/06—Investigating concentration of particle suspensions
Abstract
The invention discloses a detecting device for paper mill boiler wet desulphurization flue gas. The detecting device comprises a CEMS analyzer, a heat exchange device, a filter and a gas-water separator; the heat exchange device is arranged in a vertical pipe section of an exhaust channel of a desulphurization tower, a flue gas sampling channel is formed above the heat exchange device and obliquely extends upwards, and the tail end of the flue gas sampling channel is connected to the CEMS analyzer; the flue gas sampling channel is a double-layer hollow pipeline, a suction fan is arranged in the inner layer pipe wall, through holes communicated with an interlayer cavity are formed in the bottom of the inner layer pipe wall, and an annular air outlet is formed in the inner side face of the outer layer pipe wall and faces the exhaust channel of the desulphurization tower; the filter and the gas-water separator are sequentially arranged in the inner layer pipe wall of the flue gas sampling channel. The detecting device for the paper mill boiler wet desulphurization flue gas can prevent ponding block of the sampling channel and greatly improve stability of CEMS detection.
Description
Technical field
The present invention relates to pulp technology for making paper, a kind of more particularly to paper mill boiler wet method desulfurization fume detection means.
Background technology
FGD English full name is " Flue gas desulfurization ", refers to flue gas desulfurization, flue gas desulfurization.Desulfurization
The principles of chemistry be：Absorbing liquid enters through desulfurizing tower top jet nozzle spray atomizing, is dispersed into tiny drop and covers absorption tower
Whole packing layer section.These drops are contacted with flue gas adverse current in tower, and mass transfer and absorbing reaction occur, SO2 in flue gas,
SO3 and HCL, HF are absorbed.The oxidation of SO2 absorption product and neutralization reaction complete and end form in the zoneofoxidation absorbing tower bottom
Become Gypsum Fibrosum.In order to maintain the constant pH value of absorbing liquid and reduce limestone consumption, limestone is successively added absorption tower, inhales simultaneously
Absorbent slurry in receipts tower is stirred machine and absorption tower circulating pump ceaselessly stirs, uniform in serosity to accelerate limestone
And dissolving.
CEMS is the abbreviation of English Continuous Emission Monitoring System, refers to atmospheric pollution
The gaseous contaminant of source emission and particulate matter carry out concentration and total emission volumn continuous monitoring and information are real-time transmitted to supervisor portion
The device of door, is referred to as " flue gas automatic monitored control system ", also known as " flue gas discharge continuous monitoring system " or " flue gas on-line monitoring system
System ".
Regular increase serum recycle amount in the operation of FGD desulphurization system, thus control discharge index in qualified model
In enclosing, the exiting flue gas water content of therefore FGD desulphurization system is high, due to flue gas water content in CEMS sampling process, sampling tube
, easily seeping phenomenon in sampling tube in height, makes flue gas sampling channel blockage, causes sample uneven, environmental protection index SO2
Unstable rising, causes Monitoring Data inaccurate, and produces the circulating pump electric quantity loss putting into operation, and increases operation hours
Deng situations such as.
Content of the invention
For solving above-mentioned technical problem, the invention provides a kind of paper mill boiler wet method desulfurization fume detection means, use
In solving easy hydrops in existing CEMS analysis detection sampling tube, make flue gas sampling channel blockage, uneven the asking of sample
Topic.
The present invention is realized in：
A kind of paper mill boiler wet method desulfurization fume detection means, including CEMS analyser, heat-exchange device, filter,
Moisture trap and sealing device for storing liquid；
The discharge flue of desulfurizing tower includes level to the horizontal pipeline section of arrangement with vertically to the vertical pipeline section of arrangement, described row
One end of cigarette channel is connected to desulfurizing tower, and the other end is connected to chimney；
Described heat-exchange device is arranged in the vertical pipeline section of desulfurizing tower discharge flue, and described heat-exchange device includes two panels
With the heat exchanging fin of plate, in heat exchanging fin, it is furnished with refrigerant circulation networking, heat exchanging fin is vertically installed in the interior of vertical pipeline section
On the wall of side, coolant carries out heat exchange with the flue gas in discharge flue in heat exchanging fin, and the lower edge of heat exchanging fin is provided with condensation
Water water receiving tank, condensed water water receiving tank is connected to the storage tank being arranged at outside discharge flue by pipeline；
In described vertical pipeline section, the top of heat-exchange device is provided with flue gas sampling passage, and described flue gas sampling passage inclines
Extend obliquely, the end of flue gas sampling passage is connected to described CEMS analyser；
Described flue gas sampling passage is double layer hollow pipeline, including inner layer tube wall, outer wall and inner layer tube wall and outer layer
Interlayer cavity between tube wall, is provided with described inner layer tube wall for the flue gas of discharge flue is pumped into flue gas sampling passage
Air exhauster, the bottom of inner layer tube wall is provided with the through hole that two or more is communicated in interlayer cavity, the inner side of described outer wall
It is provided with round wind outlet, described round wind outlet is towards desulfurizing tower discharge flue, and round wind outlet passes through pipeline on face
It is connected with gas compressing apparatus；
Described filter and moisture trap are set in turn in the inner layer tube wall of described flue gas sampling passage, described sealing
Device for storing liquid is arranged at outside flue gas sampling passage, and moisture trap passes through the aqueous vapor that condensation removes in flue gas, moisture trap
Discharge outlet is connected to described sealing device for storing liquid by pipeline.
Further, described heat exchanging fin is plate armature, and heat exchanging fin place plane with the angle of vertical direction is
30 ° to 60 °.
Further, the angle of inclination of described flue gas sampling passage is 15～30 °.
Further, the gas compressing apparatus being connected to round wind outlet are arranged at outside flue gas sampling passage, for being centrifuged wind
Machine or axial flow blower.
Further, it is additionally provided with the reverse air-out pointing to discharge flue in the inner layer tube wall of described flue gas sampling passage
Mouthful, described reverse air outlet is connected to compressed gas source by pipeline and valve, and described valve is open-minded every a setting time, to institute
State inner layer tube wall and be blown into compressed gas.
Beneficial effects of the present invention are：Paper mill of the present invention boiler wet method desulfurization fume detection means is in the smoke evacuation of desulfurizing tower
Be provided with the heat-exchange device including multiple heat exchanging fins in passage, can not only waste heat in efficient recovery flue gas, and can
So that the part aqueous vapor in flue gas is condensed, reduce the moisture content of overall flue gas；Further, in the present invention, flue gas sampling passage is to incline
It is arranged at obliquely above heat-exchange device, the hydrops being easy in passage lean on self gravitation to discharge, and flue gas sampling passage sets
It is equipped with filter and moisture trap, the moisture content of the flue gas in sampling channel can be lowered into further；In the present invention, institute
Stating sampling channel is double layer hollow passage, and inner layer tube wall bottom is provided with through hole, the medial surface of outer wall is provided with sensing
The round wind outlet of discharge flue, the high velocity air that round wind outlet produces makes the through hole of inner layer tube wall bottom produce and points to interlayer
The negative pressure of cavity, thus the hydrops amassing in inner layer tube wall bottom are discharged.The flue gas sampling of effectively solving therefore of the present invention leads to
The problem of road hydrops blocking is it is ensured that the stability of CEMS sample detecting.
Brief description
Fig. 1 is the schematic diagram of paper mill boiler wet method desulfurization fume detection means in the specific embodiment of the invention；
Fig. 2 is the structural representation of flue gas sampling passage in the specific embodiment of the invention.
Label declaration：
1st, desulfurizing tower；2nd, heat-exchange device；3rd, chimney；4th, flue gas sampling passage；5th, CEMS analyser；
6th, filter；7th, moisture trap；8th, air exhauster；9th, gas compressing apparatus；11st, horizontal pipeline section；12nd, vertical
Pipeline section；21st, heat exchanging fin；22nd, storage tank；41st, outer wall；42nd, inner layer tube wall；43rd, through hole；
44th, round wind outlet；71st, seal device for storing liquid.
Specific embodiment
By the technology contents of the detailed description present invention, structural features, realized purpose and effect, below in conjunction with embodiment
And coordinate accompanying drawing to be explained in detail.
Refer to Fig. 1 and Fig. 2, the embodiment of the present invention, a kind of paper mill boiler wet method desulfurization fume detection means, this is made
Paper plant's boiler wet method desulfurization fume detection means includes CEMS analyser 5, heat-exchange device 2, filter 6, moisture trap 7 and
Sealing device for storing liquid 71.
For being the device for flue gas desulfurization, the principles of chemistry of desulfurization are described desulfurizing tower 1：Absorbing liquid is through desulfurization top of tower
Nozzle spray atomizing enters, and is dispersed into tiny drop and covers the whole packing layer section on absorption tower.In these drops and tower
Flue gas adverse current contacts, and mass transfer and absorbing reaction occurs, SO2, SO3 and HCL in flue gas, HF are absorbed.The oxygen of SO2 absorption product
Change and neutralization reaction completes and ultimately form Gypsum Fibrosum in the zoneofoxidation absorbing tower bottom, the flue gas after desulfurization in desulfurizing tower 1 passes through
Smoke evacuation is by discharging.In the present embodiment, the discharge flue of desulfurizing tower include level to the horizontal pipeline section 11 of arrangement and vertically to
The vertical pipeline section 12 of arrangement, one end of described discharge flue is connected to desulfurizing tower 1, and the other end is connected to chimney 3.
Described heat-exchange device 2 is arranged in the vertical pipeline section 12 of desulfurizing tower discharge flue, described vertical pipeline section 12 interior-heat
The top of switch 2 is provided with flue gas sampling passage 4, and described flue gas sampling passage 4 tilts upward extension, flue gas sampling passage
4 end is connected to described CEMS analyser 5.Described filter 6 and moisture trap 7 are arranged in flue gas sampling passage 4, use
In being filtered to the flue gas in sampling channel and dehumidified.Preferably, the angle of inclination of described flue gas sampling passage 4 be 15～
30 °, that is, flue gas sampling passage 4 and the angle of horizontal direction are that in 15～30 ° of the present embodiment, flue gas sampling passage is to tilt upward
It is arranged above heat-exchange device, the hydrops being easy in passage lean on self gravitation to discharge.
Described heat-exchange device 2 includes two panels with the heat exchanging fin 21 of plate, the material of heat exchanging fin 21 be aluminium or
Aluminium alloy, is furnished with refrigerant circulation networking in heat exchanging fin 21, flowing in refrigerant circulation networking has for carrying out heat friendship with heat smoke
The coolant changing.In the present embodiment, described coolant is cooling water.Described heat exchanging fin 21 is vertically installed in the interior of vertical pipeline section 12
On the wall of side, heat smoke is contacted with heat exchanging fin surface, transfers heat to heat exchanging fin, and with refrigerant circulation networking in coolant
Carry out heat exchange.In heat exchanging process, the moisture in heat smoke can condense into liquid condensation water to the cold.In the present embodiment,
The lower edge of described heat exchanging fin 21 is provided with condensed water water receiving tank, and condensed water water receiving tank is connected to by pipeline that to be arranged at smoke evacuation logical
Storage tank 22 outside road, therefore condensed water is discharged to outside discharge flue.Preferably, described heat exchanging fin 21 place plane with perpendicular
Nogata to angle be 30 ° to 60 °, in this angular range, that is, ensure that heat smoke is fully contacted with heat exchanging fin, makes heat
Flue gas and coolant sufficient heat exchange, will not produce impact to the smoke exhaust efficiency of desulfurizing tower simultaneously again.
It is provided with the heat-exchange device 2 including multiple heat exchanging fins in the discharge flue of desulfurizing tower 1, can not only be effective
Waste heat in recovered flue gas, and the part aqueous vapor in flue gas can be made to condense, reduce the moisture content of overall flue gas, thus reducing
Enter the moisture content of the flue gas in flue gas sampling passage.
Refer to Fig. 2, in the present embodiment, described flue gas sampling passage 4 is double layer hollow pipeline, including inner layer tube wall
42nd, the interlayer cavity between outer wall 41 and inner layer tube wall 42 and outer wall 41, is provided with use in described inner layer tube wall 42
In the air exhauster 8 that the flue gas of discharge flue is pumped into flue gas sampling passage.Described filter 6 and moisture trap 7 set gradually
In the inner layer tube wall 42 of described flue gas sampling passage, described sealing device for storing liquid 71 is arranged at outside flue gas sampling passage 4, air water
The discharge outlet of separator 7 is connected to described sealing device for storing liquid 71 by pipeline.
Wherein, described filter 6 includes electrode film and the negative electrode plate that filter screen and dedusting use, and described filter screen may filter that
Flue dust group in the larger impurity of some particle diameters, such as discharge flue；Described electrode film relatively and be arranged in parallel, in two electrode slices
Between form high-voltage electrostatic field, the fine grained such as flue dust moves to electrode in the presence of high-voltage electrostatic field and is adsorbed on electrode.
It is provided with multiple condensate films in described moisture trap, be condensed into liquid during aqueous vapor condensation by contact piece in flue gas, and be expelled to
Sealing device for storing liquid 71.Described moisture trap can be lowered into the moisture content of the flue gas in sampling channel further, thus dropping
The probability that low sampling channel hydrops occur.
Wherein, the bottom of described inner layer tube wall 42 is provided with the through hole 43 that two or more is communicated in interlayer cavity, described
Round wind outlet 44 is provided with the medial surface of outer wall 41, described round wind outlet 44 towards desulfurizing tower discharge flue, and
And round wind outlet is connected with gas compressing apparatus 9 by pipeline.Gas compressing apparatus 9 are used for producing compressed gas and by pipe
Road blows out from round wind outlet 44, gas flow direction in the arrow surface sampling channel in Fig. 2.Wherein, described gas compression
Device is arranged at outside flue gas sampling passage, is connected with round wind outlet 44 by pipeline, and gas compressing apparatus can be centrifugation wind
Machine or axial flow blower.
In an embodiment, described sampling channel is double layer hollow passage, and inner layer tube wall bottom is provided with through hole 43, the row of sensing
The high velocity air that the round wind outlet 44 of cigarette channel produces makes the through hole 43 of inner layer tube wall bottom produce and points to the negative of interlayer cavity
Pressure, makes the air flow direction outside sandwich cavity of through hole, and eventually flows in discharge flue, thus will amass in inner layer tube wall bottom
Hydrops are discharged.The problem of the flue gas sampling channel stagnant water blocking of effectively solving therefore of the present invention is it is ensured that CEMS sample detecting
Stability.
In one embodiment, it is additionally provided with the inner layer tube wall 42 of described flue gas sampling passage and point to the reverse of discharge flue
Air outlet, described reverse air outlet is connected to external compressed gas source by pipeline and valve, and described valve is when one sets
Between open-minded, be blown into reverse compression gas to described inner layer tube wall.The flow velocity of described reverse compression gas is big, can be by filter 6 He
Laying dust on moisture trap 7 blows out to discharge flue, and can be by the remaining hydrops in inner layer tube wall in the lump blowback to row
In cigarette channel.
The foregoing is only embodiments of the invention, not thereby limit the present invention the scope of the claims, every using this
Equivalent structure or equivalent flow conversion that bright description and accompanying drawing content are made, or directly or indirectly it is used in other related skills
Art field, is included within the scope of the present invention.
Claims (5)
1. a kind of paper mill boiler wet method desulfurization fume detection means is it is characterised in that include CEMS analyser, heat exchange dress
Put, filter, moisture trap and sealing device for storing liquid；
The discharge flue of desulfurizing tower includes level to the horizontal pipeline section of arrangement with vertically to the vertical pipeline section of arrangement, and described smoke evacuation is led to
The one end in road is connected to desulfurizing tower, and the other end is connected to chimney；
Described heat-exchange device is arranged in the vertical pipeline section of desulfurizing tower discharge flue, and described heat-exchange device includes more than two panels
The heat exchanging fin of tabular, is furnished with refrigerant circulation networking in heat exchanging fin, heat exchanging fin is vertically installed in the medial wall of vertical pipeline section
On, coolant carries out heat exchange with the flue gas in discharge flue in heat exchanging fin, and the lower edge of heat exchanging fin is provided with condensed water and connects
Tank, condensed water water receiving tank is connected to the storage tank being arranged at outside discharge flue by pipeline；
In described vertical pipeline section, the top of heat-exchange device is provided with flue gas sampling passage, described flue gas sampling channel slopes to
Upper extension, the end of flue gas sampling passage is connected to described CEMS analyser；
Described flue gas sampling passage is double layer hollow pipeline, including inner layer tube wall, outer wall and inner layer tube wall and outer wall
Between interlayer cavity, be provided with the convulsion for the flue gas of discharge flue being pumped into flue gas sampling passage in described inner layer tube wall
Machine, the bottom of inner layer tube wall is provided with the through hole that two or more is communicated in interlayer cavity, on the medial surface of described outer wall
It is provided with round wind outlet, described round wind outlet is towards desulfurizing tower discharge flue, and round wind outlet is connected by pipeline
There are gas compressing apparatus；
Described filter and moisture trap are set in turn in the inner layer tube wall of described flue gas sampling passage, described sealing liquid storage
Device is arranged at outside flue gas sampling passage, and moisture trap passes through the aqueous vapor that condensation removes in flue gas, the draining of moisture trap
Mouth is connected to described sealing device for storing liquid by pipeline.
2. paper mill according to claim 1 boiler wet method desulfurization fume detection means is it is characterised in that described heat exchange
Piece is plate armature, and heat exchanging fin place plane is 30 ° to 60 ° with the angle of vertical direction.
3. paper mill according to claim 1 boiler wet method desulfurization fume detection means is it is characterised in that described flue gas is adopted
The angle of inclination of sample passage is 15～30 °.
4. paper mill according to claim 1 boiler wet method desulfurization fume detection means is it is characterised in that be connected to annular
The gas compressing apparatus of air outlet are arranged at outside flue gas sampling passage, are centrifugal blower or axial flow blower.
5. paper mill according to claim 1 boiler wet method desulfurization fume detection means is it is characterised in that described flue gas is adopted
It is additionally provided with the reverse air outlet pointing to discharge flue, described reverse air outlet passes through pipeline and valve in the inner layer tube wall of sample passage
Door is connected to compressed gas source, and described valve is open-minded every a setting time, is blown into compressed gas to described inner layer tube wall.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610597857.5A CN106124707B (en) | 2016-07-27 | 2016-07-27 | Detecting device for paper mill boiler wet desulphurization flue gas |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610597857.5A CN106124707B (en) | 2016-07-27 | 2016-07-27 | Detecting device for paper mill boiler wet desulphurization flue gas |
Publications (2)
| Publication Number | Publication Date |
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| CN106124707A CN106124707A (en) | 2016-11-16 |
| CN106124707B true CN106124707B (en) | 2017-02-22 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610597857.5A Active CN106124707B (en) | 2016-07-27 | 2016-07-27 | Detecting device for paper mill boiler wet desulphurization flue gas |
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Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106969951B (en) * | 2017-05-11 | 2024-01-26 | 邯郸学院 | Anti-blocking dehumidifying sampling equipment in continuous automatic flue gas monitoring system |
| CN112483738B (en) * | 2020-11-26 | 2022-07-01 | 北票万宏钼业有限公司 | Detection device for waste gas desulfurization treatment with pipeline connection function |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0641430A4 (en) * | 1992-05-14 | 1995-09-13 | Iei Pty Ltd | Gas sampling point for smoke/pollution detection systems. |
| CN201514366U (en) * | 2009-09-17 | 2010-06-23 | 北京远东仪表有限公司 | Flue gas detecting system |
| CN102279119B (en) * | 2011-03-23 | 2014-12-10 | 上海北分仪器技术开发有限责任公司 | High temperature smoke detecting and sampling system |
| CN103149056A (en) * | 2013-01-31 | 2013-06-12 | 上海凯源仪器技术有限公司 | High-temperature smoke detecting and sampling device |
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2016
- 2016-07-27 CN CN201610597857.5A patent/CN106124707B/en active Active
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Address after: 363900 official Hill Industrial Park, Wuan Town, Changtai County, Zhangzhou, Fujian Patentee after: Shanying South China Paper Co., Ltd Address before: 363900 official Hill Industrial Park, Wuan Town, Changtai County, Zhangzhou, Fujian Patentee before: FUJIAN LIANSHENG PAPER INDUSTRY Co.,Ltd. |
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