CN109987555A - The construction method of pneumatic enhanced demister - Google Patents
The construction method of pneumatic enhanced demister Download PDFInfo
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- CN109987555A CN109987555A CN201910198331.3A CN201910198331A CN109987555A CN 109987555 A CN109987555 A CN 109987555A CN 201910198331 A CN201910198331 A CN 201910198331A CN 109987555 A CN109987555 A CN 109987555A
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- Prior art keywords
- absorption tower
- enhanced
- pneumatic
- demister
- hydraulic lifting
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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
- B01D53/14—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 by absorption
- B01D53/18—Absorbing units; Liquid distributors therefor
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B66—HOISTING; LIFTING; HAULING
- B66F—HOISTING, LIFTING, HAULING OR PUSHING, NOT OTHERWISE PROVIDED FOR, e.g. DEVICES WHICH APPLY A LIFTING OR PUSHING FORCE DIRECTLY TO THE SURFACE OF A LOAD
- B66F11/00—Lifting devices specially adapted for particular uses not otherwise provided for
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Geology (AREA)
- Mechanical Engineering (AREA)
- Structural Engineering (AREA)
- Analytical Chemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Oil, Petroleum & Natural Gas (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Vaporization, Distillation, Condensation, Sublimation, And Cold Traps (AREA)
Abstract
The invention discloses a kind of construction methods of pneumatic enhanced demister, absorption tower is divide into upper part and lower part first, platform is built at the buttress of the spray piping on absorption tower and the supporting beam of spray piping, column and hydraulic lifting apparatus are installed on platform, packing is installed in upper absorption inner wall of tower, upper absorption tower is raised to required height using hydraulic lifting apparatus.Compared to traditional absorption tower remodeling method, construction method of the invention cuts absorption tower, absorption tower is divided into upper absorption tower and lower absorption tower two parts, lifting operation only is carried out to upper absorption tower, more than ten meters of upper absorption tower whole height, weight are more than 100 tons, greatly reduce absorption tower transformation project amount, can save the cost can also reduce construction risk.
Description
Technical field
The present invention relates to project installation field more particularly to a kind of construction methods for starting enhanced demister.
Background technique
Pneumatic enhanced demister is mainly used in the absorption tower of wet desulphurization industry, and effect is to remove in air-flow
Mist, this mist not only contain moisture, also dissolved with substances such as sulfuric acid, sulfate, sulfur dioxide, to blower, heat exchanger and flue
It is stained, corrosion very capable, it is therefore desirable to remove.
What is generally installed in traditional absorption tower is a kind of old demister, with new pneumatic enhanced demister in shape
It is different in size, if replacing the height that old demister needs to increase absorption tower with pneumatic enhanced demister.The prior art
Way is that entire absorption tower is lifted since the bottom on absorption tower, and entire absorption tower height degree about 50m, weight are more than 400 tons, not only
Height is required to the hydraulic lifting apparatus of lifting, and needs to modify the spray piping on absorption tower, project amount is big.
Summary of the invention
The technical problem to be solved in the present invention is to provide a kind of construction methods of new pneumatic enhanced demister, to absorption
Tower is cut, and absorption tower is divided into upper absorption tower and lower absorption tower two parts, and only to upper absorption tower, (upper absorption tower refers to suction
The part of the high 30m or more of tower beacon is received, demister is mounted in absorption tower) it is lifted, it reduces and pneumatic enhanced demisting is installed
The difficulty of construction of device, while the spray piping that former absorption tower is transformed is avoided, reduce whole project amount.
In order to solve the above technical problems, the technical solution adopted by the present invention are as follows: a kind of construction of pneumatic enhanced demister
Method includes the following steps:
Step 1: platform and scaffold are built below the cutting line of absorption tower, cutting line is located at below old demister (cutting
The absolute altitude of line is 30m or so), the hard point of platform and scaffold is located at the buttress and spray piping of the spray piping on absorption tower
Supporting beam；
Step 2: the expansion joint for removing the net flue in absorption tower and associated conduit, the cable testing bridge etc. that influence construction are set
It is standby；
Step 3: column being installed on platform, hydraulic lifting apparatus is installed on column, is installed more than the cutting line of absorption tower
Packing；Then hydraulic lifting apparatus is tentatively promoted, increase the lift lever of hydraulic lifting apparatus and gib head, gib head holds out against packing；
Step 4: being cut at cutting line, absorption tower is split as two parts up and down；
Step 5: starting hydraulic lifting apparatus, absorption tower in lifting；
Step 6: new siding is welded in the bottom on upper absorption tower；
Step 7: packing being installed on new siding；
Step 8: step 5-7 is repeated, until upper absorption tower is promoted to required height；
Step 9: removing old demister, new pneumatic enhanced demister is installed.
Further, the packing is the channel steel after curved arc, and the internal diameter of packing and the internal diameter on absorption tower are equal, swollen
Circle is generally divided into three sections, and insertion is welded in the door shape snap-gauge for absorbing inner wall of tower；In order to improve the intensity of packing and avoid sliding
It moves, reinforcing rib can be set inside channel steel, and welding is used for anti-skidding angle steel between channel steel and the inner wall on upper absorption tower.
Further, diagonal brace is provided between the column and platform.
Further, the erosion resistant coating that inner wall of tower corresponds to packing position is absorbed in the preparation stage removal of construction, it is ensured that door
Shape snap-gauge firm welding, while reducing packing and the upper sliding absorbed between inner wall of tower.
Further, in the step 5, the process on absorption tower is gradually to carry out in lifting, is lifted upper absorption tower every time
Suspend after setting height, observes and check whether column, packing and hydraulic lifting apparatus are normal；Check all hydraulic lifting device
Hoisting depth, if the maximum height difference of hydraulic lifting apparatus be more than setting value, all hydraulic lifting device is adjusted
It is flat；In leveling, a hoisting depth of single hydraulic lifting apparatus is no more than 3mm.
The utility model has the advantages that construction method of the invention cuts absorption tower, absorption tower is divided into upper absorption tower under
Absorption tower two parts, only carry out lifting operation to upper absorption tower, and more than ten meters of upper absorption tower whole height, weight are more than 100
Ton, greatly reduce absorption tower transformation project amount, can save the cost can also reduce construction risk.
Detailed description of the invention
Fig. 1 is the construction schematic diagram of the pneumatic enhanced demister of embodiment 1.
Wherein: 1, upper absorption tower；2, lower absorption tower；3, packing；4, door shape snap-gauge；5, platform；6, column；7, diagonal brace；8,
Hydraulic lifting apparatus；9, reinforcing rib；10, angle steel；11, lift lever；12, gib head；13, cutting line.
Specific embodiment
Invention is further described in detail With reference to embodiment.
Embodiment 1
As shown in Figure 1, the construction method of the pneumatic enhanced demister of the present embodiment, includes the following steps:
Step 1: 1 inner wall of absorption tower corresponds to the erosion resistant coating of 3 position of packing in removal, welds multiple shape snap-gauges in the position
4；
Step 2: building platform 5 and scaffold in 13 or less absorption tower cutting line, (scaffold is used to provide for construction worker
It is convenient, be not shown in the figure), cutting line 13 is located at below old demister (absolute altitude of cutting line 13 is 30m or so), 5 He of platform
The hard point of scaffold is located at the buttress of the spray piping on absorption tower and the supporting beam of spray piping；
Step 3: the expansion joint for removing the net flue in absorption tower and associated conduit, the cable testing bridge etc. that influence construction are set
It is standby；
Step 4: column 6 being installed on platform 5, diagonal brace 7 is provided between column 6 and platform 5, is installed on column 6 hydraulic
Lifting device 8, on absorption tower, 13 or more cutting line installs packing 3, and packing 3 is the #25 channel steel after curved arc, packing 3
Internal diameter is equal with the internal diameter on absorption tower, and it is three sections that packing 3, which divides, and insertion is welded in the door shape snap-gauge 4 for absorbing inner wall of tower；In channel steel
Inside setting reinforcing rib 9, and welding is used for anti-skidding angle steel 10 between channel steel and the inner wall on upper absorption tower 1；Then it tentatively mentions
Hydraulic lifting apparatus 8 is risen, increase the lift lever 11 of hydraulic lifting apparatus 8 and gib head 12, gib head 12 holds out against packing 3；
Step 5: being cut at cutting line 13, absorption tower is split as upper absorption tower 1 and lower 2 two parts of absorption tower；
Step 6: starting hydraulic lifting apparatus 8, absorption tower 1 in lifting；
Step 7: welding new siding in the bottom on upper absorption tower 1；
Step 8: packing 3 is installed on new siding；
Step 9: step 6-8 is repeated, until upper absorption tower 1 is promoted to required height；
Step 9: removing old demister, new pneumatic enhanced demister is installed；
Step 10: removing platform 5, hydraulic lifting apparatus 8, column 6 etc.；
Step 11: the ending such as the attachmentes such as installation nozzle, polishing examination, sandblasting, spraying corrosion resistant coating, examination, dismounting scaffold
Work.
In above-mentioned steps 6, the process on absorption tower 1 is gradually to carry out in lifting, is lifted upper absorption tower 1 every time about
Suspend 10 minutes after 100mm, observes and check whether column 6, packing 3 and hydraulic lifting apparatus 8 are normal；Check that all hydraulic mentions
The hoisting depth of device 8 is risen, if the maximum height difference of hydraulic lifting apparatus 8 is more than setting value, all hydraulic is promoted and is filled
8 are set to be leveled；In leveling, a hoisting depth of single hydraulic lifting apparatus 8 is no more than 3mm.
Although embodiments of the present invention are illustrated in specification, these embodiments are intended only as prompting,
It should not limit protection scope of the present invention.It is equal that various omission, substitution, and alteration are carried out without departing from the spirit and scope of the present invention
It should be included within the scope of the present invention.
Claims (8)
1. a kind of construction method of pneumatic enhanced demister, it is characterised in that include the following steps:
Step 1: platform and scaffold are built below the cutting line of absorption tower, cutting line is located at below old demister, platform and foot
The hard point of hand cradle is located at the buttress of the spray piping on absorption tower and the supporting beam of spray piping；
Step 2: the equipment for removing the influence construction in absorption tower；
Step 3: column being installed on platform, hydraulic lifting apparatus is installed on column, packing is installed more than the cutting line of absorption tower；
Step 4: being cut at cutting line, absorption tower is split as two parts up and down；
Step 5: starting hydraulic lifting apparatus, absorption tower in lifting；
Step 6: new siding is welded in the bottom on upper absorption tower；
Step 7: packing being installed on new siding；
Step 8: step 5-7 is repeated, until upper absorption tower is promoted to required height；
Step 9: removing old demister, new pneumatic enhanced demister is installed.
2. the construction method of pneumatic enhanced demister according to claim 1, it is characterised in that: the packing is to pass through
Channel steel after curved arc.
3. the construction method of pneumatic enhanced demister according to claim 2, it is characterised in that: set inside the channel steel
It is equipped with reinforcing rib.
4. the construction method of pneumatic enhanced demister according to claim 3, it is characterised in that: in channel steel and upper absorption
Welding is used for anti-skidding angle steel between the inner wall of tower.
5. the construction method of pneumatic enhanced demister according to claim 1, it is characterised in that: the column and platform
Between be provided with diagonal brace.
6. the construction method of pneumatic enhanced demister according to claim 1, it is characterised in that: in the preparation rank of construction
The erosion resistant coating that inner wall of tower corresponds to packing position is absorbed in section removal.
7. the construction method of pneumatic enhanced demister according to claim 1, it is characterised in that: in the step 5,
The process on absorption tower is gradually to carry out in lifting, is suspended after being lifted upper absorption tower setting height every time, observes and check column, swollen
Whether circle and hydraulic lifting apparatus are normal；The hoisting depth for checking all hydraulic lifting device, if hydraulic lifting apparatus is most
Big height difference is more than setting value, then levels to all hydraulic lifting device.
8. the construction method of pneumatic enhanced demister according to claim 7, it is characterised in that: in leveling, individually
Hoisting depth of hydraulic lifting apparatus is no more than 3mm.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910198331.3A CN109987555A (en) | 2019-03-15 | 2019-03-15 | The construction method of pneumatic enhanced demister |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201910198331.3A CN109987555A (en) | 2019-03-15 | 2019-03-15 | The construction method of pneumatic enhanced demister |
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Citations (8)
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|---|---|---|---|---|
| CN101879407A (en) * | 2010-07-30 | 2010-11-10 | 广东火电工程总公司 | Structure and method for jacking absorption tower from middle segment |
| CN101879399A (en) * | 2010-07-30 | 2010-11-10 | 广东火电工程总公司 | Structure and method for jacking absorption tower from middle segment |
| CN105776067A (en) * | 2016-05-25 | 2016-07-20 | 中国能源建设集团湖南火电建设有限公司 | Lifting device and inverted installing method for reducing absorption tower |
| CN105836678A (en) * | 2016-05-25 | 2016-08-10 | 中国能源建设集团湖南火电建设有限公司 | Lifting device and lifting method for large tank |
| CN106731517A (en) * | 2016-12-22 | 2017-05-31 | 华润电力（菏泽）有限公司 | A kind of cylinder tower cutting jacking turns to technique |
| CN106836836A (en) * | 2017-01-23 | 2017-06-13 | 山东国舜建设集团有限公司 | A kind of Flue Gas Desulphurization for Coal-burning Power Plant tower transforms secondary hydraulic lifting installation method |
| CN108502774A (en) * | 2018-06-06 | 2018-09-07 | 中国能源建设集团广东火电工程有限公司 | A kind of absorption tower tower top steering structure and forward method |
| CN108756441A (en) * | 2018-08-11 | 2018-11-06 | 中国电建集团贵州电力设计研究院有限公司 | A kind of hydraulic lifting flipped device and its hanging method for reducing tower |
-
2019
- 2019-03-15 CN CN201910198331.3A patent/CN109987555A/en active Pending
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101879407A (en) * | 2010-07-30 | 2010-11-10 | 广东火电工程总公司 | Structure and method for jacking absorption tower from middle segment |
| CN101879399A (en) * | 2010-07-30 | 2010-11-10 | 广东火电工程总公司 | Structure and method for jacking absorption tower from middle segment |
| CN105776067A (en) * | 2016-05-25 | 2016-07-20 | 中国能源建设集团湖南火电建设有限公司 | Lifting device and inverted installing method for reducing absorption tower |
| CN105836678A (en) * | 2016-05-25 | 2016-08-10 | 中国能源建设集团湖南火电建设有限公司 | Lifting device and lifting method for large tank |
| CN106731517A (en) * | 2016-12-22 | 2017-05-31 | 华润电力（菏泽）有限公司 | A kind of cylinder tower cutting jacking turns to technique |
| CN106836836A (en) * | 2017-01-23 | 2017-06-13 | 山东国舜建设集团有限公司 | A kind of Flue Gas Desulphurization for Coal-burning Power Plant tower transforms secondary hydraulic lifting installation method |
| CN108502774A (en) * | 2018-06-06 | 2018-09-07 | 中国能源建设集团广东火电工程有限公司 | A kind of absorption tower tower top steering structure and forward method |
| CN108756441A (en) * | 2018-08-11 | 2018-11-06 | 中国电建集团贵州电力设计研究院有限公司 | A kind of hydraulic lifting flipped device and its hanging method for reducing tower |
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Application publication date: 20190709 |
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| RJ01 | Rejection of invention patent application after publication |