CN107376622A - A kind of repair method of wet method fume desulfurizing system absorption tower spray system - Google Patents
A kind of repair method of wet method fume desulfurizing system absorption tower spray system Download PDFInfo
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- CN107376622A CN107376622A CN201710463085.0A CN201710463085A CN107376622A CN 107376622 A CN107376622 A CN 107376622A CN 201710463085 A CN201710463085 A CN 201710463085A CN 107376622 A CN107376622 A CN 107376622A
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- Prior art keywords
- branch pipe
- spray system
- absorption tower
- access hole
- pipe
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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
- B01D53/80—Semi-solid phase processes, i.e. by using slurries
-
- 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
- B01D53/48—Sulfur compounds
- B01D53/50—Sulfur oxides
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2251/00—Reactants
- B01D2251/40—Alkaline earth metal or magnesium compounds
- B01D2251/404—Alkaline earth metal or magnesium compounds of calcium
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2258/00—Sources of waste gases
- B01D2258/02—Other waste gases
- B01D2258/0283—Flue gases
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Environmental & Geological Engineering (AREA)
- Health & Medical Sciences (AREA)
- Biomedical Technology (AREA)
- Analytical Chemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Oil, Petroleum & Natural Gas (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Treating Waste Gases (AREA)
Abstract
The present invention provides a kind of repair method of wet method fume desulfurizing system absorption tower spray system, comprises the following steps：Judge each nozzle pass blocking state, and the pass blocking state of each nozzle is marked；Access hole is opened up in each branch pipe, each branch pipe pass blocking state is checked using pipe endoscopic monitoring device, and mark blocking position；Access hole is opened up in main pipe, main pipe is overhauled with reference to abovementioned steps；4) nozzle blocked is changed or repaired, dredge outlet is opened up in blocking position, tamper is removed by dredge outlet；5) access hole and dredge outlet are closed.Maintenance step arrangement is had clear presentation, and comprehensively without dead angle, can efficiently realize the maintenance to absorption tower spray system, and repair quality is high, overhaul efficiency is high, effectively excludes potential risk, greatly reduces the cost of overhaul.
Description
Technical field
The present invention relates to wet process of FGD field, more particularly to a kind of wet method fume desulfurizing system absorption tower spray system
Repair method.
Background technology
On September 12nd, 2014, National Development and Reform Commission, Environmental Protection Department, National Energy Board, which combine, to be issued《Coal electricity section
Can emission reduction upgrading and transformation action plan (2014-2020)》(hair changes the energy (2014) 2093), this action requirements of plan east
Portion's area (provinces and cities of Liaoning, Beijing, Tianjin, Hebei, Shandong, Shanghai, Jiangsu, Zhejiang, Fujian, Guangdong, Hainan etc. 11) newly-built combustion
Coal power generation unit Air Pollutant Emission concentration basically reaches gas turbine group emission limit (i.e. in the condition of benchmark oxygen content 6%
Under, flue dust, sulfur dioxide, discharged nitrous oxides concentration are respectively no higher than 10,35,50 milligrams/cubic metre), middle part (black dragon
The province of river, Jilin, Shanxi, Anhui, Hubei, Hunan, Henan, Jiangxi etc. 8) new-built unit is in principle close to or up gas turbine group
Emission limit, west area new-built unit is encouraged close to or up gas turbine group emission limit.It is existing to the year two thousand twenty, eastern region
Use as a servant 300,000 kilowatts and the public Thermal generation unit of the above, 100,000 kilowatts and the above provide Thermal generation unit for oneself and other are had ready conditions
Thermal generation unit, Air Pollutant Emission concentration basically reaches gas turbine group emission limit after transformation.In view of China's combustion
Coal quality, flue gas caused by all coal-burning power plants is required for carry out desulfurization process, and makes the sulfur dioxide in flue gas of discharge
Content meets above-mentioned related environmental requirement.
Desulfurization process generally uses wet desulfurization of flue gas by limestone-gypsum method system at present, wherein, spray system is wet method cigarette
Very important core apparatus, is mainly made up of shower and nozzle in desulfurization system, and spray system is arranged in desulfurization absorption
The spraying layer of tower, is properly termed as liquid distribution trough again, and slurries reach equally distributed each spray by the distributional effects of shower
Mouth, then sprayed by nozzle, fully contacted with the flue gas of reverse flow, sulfur dioxide pollution gas absorbs herein.If spray
Shower pipe road and spray nozzle clogging, must influence slurry circulating pump output, reduce desulfuration efficiency, thus spray system must ensure it is unimpeded
State.
After blocking occurs in spray system, investigate in time and maintenance is just particularly important, also, due to desulphurization system
Operative relation the operation of main brand-name computer group, its downtime is unsuitable long, and therefore, maintenance to spray system must quick height
Effect, and potential hidden danger is investigated out as far as possible.
And existing conventional maintenance mode is often difficult to quickly investigate hidden danger, below with an actual Engineering Projects explanation often
Advise the deficiency of maintenance mode.
By taking the operation troubles maintenance of a certain generator set desulfurization system in a power plant as an example, failure is presented as：Slurry circulating pump
Output is gradually reduced, until more slurry circulating pumps can not all meet that design load is contributed, exports SO2Exceeded phenomenon occurs often,
Nozzle check is carried out after shutdown and finds that spray piping blocks seriously, the abrasionproof that plugging reason is done by 3 serum recycle pump cases
All come off and cause, conventional means can only be taken in face of this hard tamper for being not easy dredging, i.e. cutting spray main pipe, branch
Pipe is taken out the operation of tamper.And because maintainer tends not to directly judge from outside the position of tamper, this
Just need to arrange cutting position as far as possible if sample, thoroughly to understand tamper, it is difficult will necessarily to increase maintenance for so operation
Degree and repair time.
The content of the invention
In order to solve the above-mentioned technical problem, the present invention provides a kind of inspection of wet method fume desulfurizing system absorption tower spray system
Repair method, can be faced after operation troubles using unit stop, big light maintenance when to absorption tower spray system carry out Quick overhaul.Maintenance step
It is rapid to arrange to have clear presentation, comprehensively without dead angle, can efficiently realize the maintenance to absorption tower spray system, and repair quality it is high,
Overhaul efficiency is high, effectively excludes potential risk, the cost of overhaul is greatly reduced, so that it is guaranteed that realizing slurry circulating pump according to design
Run value stabilization, realize and save power consumption and equipment loss, improve the purpose of desulfuration efficiency.
In order to reach above-mentioned technical purpose, type of the present invention uses technical scheme as follows：
A kind of repair method of wet method fume desulfurizing system absorption tower spray system, the spray system include multiple parts,
Part is selected from main pipe, branch pipe and nozzle, comprises the following steps：
1) judge each nozzle pass blocking state, and the pass blocking state of each nozzle is marked；
2) access hole is opened up in each branch pipe, each branch pipe pass blocking state is checked using pipe endoscopic monitoring device, and mark and block position
Put；
3) access hole is opened up in main pipe, main pipe is overhauled with reference to step 2)；
4) nozzle blocked is changed or repaired, dredge outlet is opened up in blocking position, tamper is removed by dredge outlet；
5) access hole and dredge outlet are closed.
Also include：Draw spray system layout drawing and each part is classified, sorted and marking serial numbers, Organizational Parts row
Table；The pass blocking state is recorded while each nozzle pass blocking state is marked in step 1) in list of parts；In step 2)
While marking blocking position the blocking position is recorded in list of parts；In step 4), the record in list of parts is changed
Or the nozzle that maintenance blocks, and dredge outlet is opened up according to the blocking position recorded in list of parts.
Further, by being ventilated to spray system in step 1), detection jet expansion blast judges nozzle pass blocking state.
Further, access hole is opened up in step 2) includes：
Closure plate is overhauled as branch pipe in the non-next complete plate of one end cutting connected with main pipe of branch pipe, forms access hole；
Deposited after marking corresponding branch pipe sequence number to branch pipe maintenance closure plate.
Further, access hole is opened up in step 3) includes：
In one end that main pipe connects with branch pipe, the next complete plate of cutting overhauls closure plate as main pipe, forms access hole；It is right
Main pipe maintenance closure plate is deposited after marking corresponding main pipe sequence number.
Further, opening up dredge outlet in blocking position in step 4) includes：
In the next complete plate of blocking position cutting as dredge outlet closure plate, dredge outlet is formed, to the dredge outlet closure plate mark
Deposited after remembering corresponding branch pipe or main pipe sequence number and dredging mark.
Further, access hole is closed by the access hole closure plate of storage in step 5), passes through the dredge outlet closure plate of storage
Close dredge outlet.
Further, pipe endoscopic monitoring device described in step 2) includes an image collecting device, an image display device, letter
Number connection described image harvester and image display device a signal wire, wrap up and support a support of the signal wire
Pipe, the support tube have the rigidity of radial direction and the flexibility of axial direction.
Further, the support tube is selected from metal hose or flexure spring or bellows.
Further, check that each branch pipe pass blocking state is included image collecting device using pipe endoscopic monitoring device in step 2)
Branch pipe is stretched into by access hole, by pass blocking state inside image display device Real Time Observation branch pipe, branch pipe is stretched into according to support tube
Length judges image capture position.
By using above technical scheme, the present invention detects the pass blocking state of spray branch pipe and main pipe by endoscope and image processing device,
Reduce and blindly cut and detect, avoid the confusion of Overhaul site.And by the way that maintenance craft is standardized, ordering, carry
High repair quality, simplify maintenance process, improve overhaul efficiency height, reduce the cost of overhaul.So that it is guaranteed that desulphurization system absorption tower
Run up to design load, save power consumption and equipment loss, improve desulfuration efficiency.
Brief description of the drawings
Fig. 1 is the absorption tower spray system layout drawing drawn in one embodiment of the invention.
Fig. 2 is the list of parts that corresponding diagram 1 is worked out in one embodiment of the invention.
Fig. 3 is that the flow of the repair method of wet method fume desulfurizing system absorption tower spray system in one embodiment of the invention is shown
It is intended to.
Embodiment
Below in conjunction with the accompanying drawing in the embodiment of the present invention, the technical scheme in the embodiment of the present invention is carried out clear, complete
Whole description, it is clear that described embodiment is only part of the embodiment of the present invention, rather than whole embodiments.Based on this
Embodiment in invention, the every other reality that those of ordinary skill in the art are obtained under the premise of creative work is not made
Example is applied, belongs to the scope of protection of the invention.Institute's accompanying drawing is coordinated to elaborate the features and advantages of the present invention below.
As shown in figure 3, in one embodiment, there is provided a kind of maintenance side of wet method fume desulfurizing system absorption tower spray system
Method,
The spray system includes multiple parts, and part is selected from main pipe, branch pipe and nozzle, comprised the following steps：
1) draw spray system layout drawing and each part is classified, sorted and marking serial numbers, Organizational Parts list；
2) judge each nozzle pass blocking state, and the pass blocking state of each nozzle is marked, while remember in list of parts
Record；
3) access hole is opened up in each branch pipe, each branch pipe pass blocking state is checked using pipe endoscopic monitoring device, and mark and block position
Put, while the blocking position is recorded in list of parts；
4) access hole is opened up in main pipe, main pipe is overhauled with reference to step 3)；
5) dredge outlet is opened up in blocking position, tamper is removed by dredge outlet；
6) access hole and dredge outlet are closed.
First determine whether nozzle has blocking, then judge whether that branch pipe has blocking, finally judge whether main pipe has blocking,
After judging spray nozzle clogging simultaneously, it is impossible to by nozzle dredge must carry out that branch pipe is carried out opening up dredge outlet clear up, such as
Fruit tamper is larger to be got lodged at main pipe and branch pipe interface, then just dredge outlet must be opened up in main pipe and be cleared up.
With reference to figure 1, exemplified by only one simple spray system, depict and install four with a main pipe, four branch pipes, each branch pipe
The spray system of nozzle, and each part is sorted respectively, define sequence number.Spray system form, the structure of reality may become
Change, refer to Fig. 1 and be further improved and adjust, specifically with reference to practical structures, sort successively, numbering.With machinery
The Chang Shizhe of design field, above-mentioned modifications and adaptations can be carried out with reference to figure 1 and other guide disclosed by the invention, herein not
Repeat again.
Then list of parts as shown in Figure 2 is worked out for Fig. 1 again, list of parts includes but is not limited to herein below：Respectively
Component names, each component serial numbers, each part pass blocking state and pass blocking position.It can further include, the repair time, overhaul people
The information such as member.Further multiple list of parts can also be integrated, statistics blocking position distribution, the same area or same
The parameters such as relation duration of congestion interval, reference is provided so as to improve or optimize for further equipment.
So as to it is clear, record each unit status in an orderly manner.The inspection of follow-up each step can be recorded in the list of parts
As a result.And after maintenance terminates, can also be using the list of parts as complete record of examination.
Wherein, by being ventilated to spray system in step 2), detection jet expansion blast judges nozzle pass blocking state.
Nozzle pass blocking state is marked by different colours mark in step 2).
Access hole is opened up in step 3) to be included：
Closure plate is overhauled as branch pipe in the non-next complete plate of one end cutting connected with main pipe of branch pipe, forms access hole；
Deposited after marking corresponding branch pipe sequence number to branch pipe maintenance closure plate.
Access hole is opened up in step 4) to be included：
In one end that main pipe connects with branch pipe, the next complete plate of cutting overhauls closure plate as main pipe, forms access hole；It is right
Main pipe maintenance closure plate is deposited after marking corresponding main pipe sequence number.
Opening up dredge outlet in blocking position in step 5) includes：
In the next complete plate of blocking position cutting as dredge outlet closure plate, dredge outlet is formed, to the dredge outlet closure plate mark
Deposited after remembering corresponding branch pipe or main pipe sequence number and dredging mark.
Access hole is closed by the access hole closure plate of storage in step 6), dredging is closed by the dredge outlet closure plate of storage
Mouthful.
Pipe endoscopic monitoring device described in step 3) includes an image collecting device, an image display device, signal connection institute
A signal wire of image collecting device and image display device is stated, wraps up and supports a support tube of the signal wire, the branch
Stay tube has the rigidity of radial direction and the flexibility of axial direction.
The support tube is selected from metal hose or flexure spring or bellows.
Check that each branch pipe pass blocking state is included image collecting device by access hole using pipe endoscopic monitoring device in step 3)
Branch pipe is stretched into, by pass blocking state inside image display device Real Time Observation branch pipe, branch length of tube is stretched into according to support tube and judged
Image capture position.
Below, incorporation engineering is actual, and the repair method of the present invention is described further.With to Henan power plant
Two units gas desulfurization engineerings of 350MW and 660MW are used by Zhejiang Insigma Electrical Engineering Co., Ltd's EPC over contracts
Lime stone-gypsum wet flue gas desulfurizing technique, desulfurizing agent is lime stone, desulfurizing byproduct is gypsum, and the tower of a stove one, every is inhaled
Tower is received with three slurry circulating pumps, two oxidation fans.Absorbent supplying system, FGD gypsum slurries processing system, technique water system
System, waste water drainage system are that two units are public.SO in original design desulfurization inlet flue gas2Concentration is 2229mg/Nm3, export SO2
Concentration of emission is 111mg/Nm3, design desulfuration efficiency is more than 95%.The model LC700/900II of 3 slurry circulating pumps, flow
For 8680m3/h。
By taking the maintenance of 350MW units absorption tower spray system as an example, 3 layers of spray spout, the desulfurization of branch pipe abrasionproof block serious, nothing
Method is dredged in nozzle and come out, can only be by carrying out cleaning tamper in cutting spray branch pipe.Conventional method is empirically carried out
Cutting, cutting under nozzle, skylight block (it is empirically random to be cut, cut it is not in place if cut again again, i.e.,
Waste the time reduces the intensity of spray branch pipe again) mix and put together, return during filling and be typically unable to first wife, not if first wife
Can produce bonding it is insecure, nozzle or skylight block so not only add back ETL estimated time of loading but also not had using being come off after a period of time
Spraying effect, while the lease time and expense of scaffold are virtually added, just slightly an absorption tower spray system is overhauled in estimation
System needs to spend more than 80,000 yuan of all round victory shelf, artificial, more than 30,000 yuan of fee of material.Not only reduced and cut using the repair method of the present invention
The blindness of spray branch pipe is cut, and reduces back the tedious work of dress, the intensity of spray branch pipe is both ensure that, in turn ensure that spray
Mouth, the firm intensity for blocking plate.Just slightly one absorption tower spray system of estimation maintenance needs to spend all round victory shelf more than 70,000
Member, artificial, more than 1.5 ten thousand yuan of fee of material.
Most of all, synchronously forming the record of examination of perfect form during maintenance, work progress is available for
Middle guidance, it is available for retaining after the completion of construction, and Feedback Design link, it is most valuable reference.
Claims (10)
1. a kind of repair method of wet method fume desulfurizing system absorption tower spray system, the spray system includes multiple parts, portion
Part is selected from main pipe, branch pipe and nozzle, comprises the following steps：
1) judge each nozzle pass blocking state, and be marked；
2) access hole is opened up in each branch pipe, each branch pipe pass blocking state is checked using pipe endoscopic monitoring device, and mark blocking position；
3) access hole is opened up in main pipe, main pipe is overhauled with reference to step 2)；
4) nozzle blocked is changed or repaired, dredge outlet is opened up in blocking position, tamper is removed by dredge outlet；
5) access hole and dredge outlet are closed.
2. the repair method of wet method fume desulfurizing system absorption tower as claimed in claim 1 spray system, it is characterised in that also
Including：Draw spray system layout drawing and each part is classified, sorted and marking serial numbers, Organizational Parts list；Step 1)
In the pass blocking state is recorded in list of parts while each nozzle pass blocking state is marked；Mark blocks position in step 2)
While putting the blocking position is recorded in list of parts；In step 4), the record in list of parts is changed or maintenance blocks
Nozzle, and dredge outlet is opened up according to the blocking position recorded in list of parts.
3. the repair method of wet method fume desulfurizing system absorption tower as claimed in claim 1 spray system, it is characterised in that step
It is rapid 1) in by being ventilated to spray system, detection jet expansion blast judges nozzle pass blocking state.
4. the repair method of wet method fume desulfurizing system absorption tower as claimed in claim 1 spray system, it is characterised in that step
It is rapid 2) in open up access hole and include：
Closure plate is overhauled as branch pipe in the non-next complete plate of one end cutting connected with main pipe of branch pipe, forms access hole；To this
Branch pipe maintenance closure plate is deposited after marking corresponding branch pipe sequence number.
5. the repair method of wet method fume desulfurizing system absorption tower as claimed in claim 4 spray system, it is characterised in that step
It is rapid 3) in open up access hole and include：
In one end that main pipe connects with branch pipe, the next complete plate of cutting overhauls closure plate as main pipe, forms access hole；To the mother
Pipe maintenance closure plate is deposited after marking corresponding main pipe sequence number.
6. the repair method of wet method fume desulfurizing system absorption tower as claimed in claim 5 spray system, it is characterised in that step
It is rapid 4) in open up dredge outlet in blocking position and include：
In the next complete plate of blocking position cutting as dredge outlet closure plate, dredge outlet is formed, phase is marked to the dredge outlet closure plate
Deposited after answering branch pipe or main pipe sequence number and dredging mark.
7. the repair method of wet method fume desulfurizing system absorption tower as claimed in claim 6 spray system, it is characterised in that step
It is rapid 5) in access hole closed by the access hole closure plate of storage, the dredge outlet closure plate for passing through storage closes dredge outlet.
8. the repair method of wet method fume desulfurizing system absorption tower as claimed in claim 1 spray system, it is characterised in that step
It is rapid 2) described in pipe endoscopic monitoring device include an image collecting device, an image display device, signal connection described image collection
One signal wire of device and image display device, wrap up and support a support tube of the signal wire, the support tube has footpath
To rigidity and axial direction flexibility.
9. the repair method of wet method fume desulfurizing system absorption tower as claimed in claim 8 spray system, it is characterised in that institute
State support tube and be selected from metal hose or flexure spring or bellows.
10. the repair method of wet method fume desulfurizing system absorption tower as claimed in claim 8 spray system, it is characterised in that
Check that each branch pipe pass blocking state includes image collecting device stretching into branch pipe by access hole using pipe endoscopic monitoring device in step 2),
By pass blocking state inside image display device Real Time Observation branch pipe, branch length of tube is stretched into according to support tube and judges IMAQ position
Put.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710463085.0A CN107376622B (en) | 2017-06-19 | 2017-06-19 | Overhauling method of absorption tower spraying system of wet flue gas desulfurization system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710463085.0A CN107376622B (en) | 2017-06-19 | 2017-06-19 | Overhauling method of absorption tower spraying system of wet flue gas desulfurization system |
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| Publication Number | Publication Date |
|---|---|
| CN107376622A true CN107376622A (en) | 2017-11-24 |
| CN107376622B CN107376622B (en) | 2020-06-26 |
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ID=60333386
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| CN201710463085.0A Active CN107376622B (en) | 2017-06-19 | 2017-06-19 | Overhauling method of absorption tower spraying system of wet flue gas desulfurization system |
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1251781A (en) * | 1998-10-15 | 2000-05-03 | 巴陵石化鹰山石油化工厂 | Method for cleaning tail pipe under hydrogen-making converter and its plug |
| CN202173874U (en) * | 2011-07-05 | 2012-03-28 | 中环（中国）工程有限公司 | Internal monitoring device for wet method flue gas desulfurization facility |
| CN202400491U (en) * | 2012-01-17 | 2012-08-29 | 哈尔滨润河科技有限公司 | Coal chute pneumatic unblocking device capable of realizing automatic control |
| CN105854576A (en) * | 2016-05-30 | 2016-08-17 | 万亨 | Flue gas treatment tower and treatment system |
-
2017
- 2017-06-19 CN CN201710463085.0A patent/CN107376622B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1251781A (en) * | 1998-10-15 | 2000-05-03 | 巴陵石化鹰山石油化工厂 | Method for cleaning tail pipe under hydrogen-making converter and its plug |
| CN202173874U (en) * | 2011-07-05 | 2012-03-28 | 中环（中国）工程有限公司 | Internal monitoring device for wet method flue gas desulfurization facility |
| CN202400491U (en) * | 2012-01-17 | 2012-08-29 | 哈尔滨润河科技有限公司 | Coal chute pneumatic unblocking device capable of realizing automatic control |
| CN105854576A (en) * | 2016-05-30 | 2016-08-17 | 万亨 | Flue gas treatment tower and treatment system |
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| CN107376622B (en) | 2020-06-26 |
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