CN208205044U - A kind of single-drum chimney suitable for steam power plant's built by separate periods - Google Patents
A kind of single-drum chimney suitable for steam power plant's built by separate periods Download PDFInfo
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- CN208205044U CN208205044U CN201820270961.8U CN201820270961U CN208205044U CN 208205044 U CN208205044 U CN 208205044U CN 201820270961 U CN201820270961 U CN 201820270961U CN 208205044 U CN208205044 U CN 208205044U
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Abstract
The utility model discloses a kind of single-drum chimneys suitable for steam power plant's built by separate periods, including merogenesis stack shell and air door, the air door is semi-enclosed air door, air door is fixedly mounted on the inside of merogenesis stack shell, the semi-enclosed air door is under different operating conditions, there is different working conditions, so that power plant can choose the chimney of construction more large outlet diameter in first stage of construction, chimney is allowed to be well adapted for the operating load operating condition that unit is different during extending from project initial stage to later period, chimney has been widened significantly to the receiving range of flue gas flow, in the case where that can not determine later period construction scale, more enlarging spaces can be reserved.Avoid the generation that cold air flows backward phenomenon.Secondly, avoiding the later period after primary construction is completed since the improper caused dismounting of initial stage type selecting is rebuild or additional construction, to reduce whole investment, also extending the seeervice cycle of design, and improve the safety and stability that chimney is built.
Description
Technical field
The utility model belongs to chimney technical field, and in particular to a kind of monotubular cigarette suitable for steam power plant's built by separate periods
Chimney.
Background technique
The construction of steam power plant generally according to the principle of " unified planning is implemented step by step, electricity determining by heat, on a fairly large scale ", in conjunction with
The actual conditions of block thermic load development, time phasing.Built by separate periods refers to the very long work of the bigger requirement of engineering of construction volume
Complete either to have completed requirement of engineering to be extended again as the time limit, the construction of both modes can be carried out by stages
To build.For steam power plant, built by separate periods has very big advantage, can there is benefit economically, can also improve heat
The configuration and operation work of power plant, to sum up, built by separate periods is trend from now on, it is not limited to the construction of steam power plant.
The main exit that chimney discharges pollutants as steam power plant plays very important status in steam power plant's construction,
And because the unit of steam power plant is bigger, the chimney height needed is big, and steam power plant of China built by separate periods project is generally adopted at present
Chimney structure form is sleeve chimney, but this kind of chimney cost for single-drum chimney wants high, and building process is multiple
Miscellaneous, for single-drum chimney, there are no be suitable for built by separate periods project.
Certainly, in order to adapt to the built by separate periods of steam power plant, the prior art also improves traditional chimney, and such as China is specially
Benefit is application No. is double internal cylinder chimneys disclosed in 201020617735.6, the chimney structure form of this patent sleeve-type chimney in fact,
As mentioned previously, sleeve-type chimney is applied to built by separate periods words in comparison cost wants high, and building process is complicated, and if monotubular
Chimney then has the disadvantage that one, can not advise to difficulty caused by built by separate periods if being applied to built by separate periods project
It keeps away, two, principle on a fairly large scale cannot be met, lacks more system, economic structural design scheme and flue gas flow controlling party
Method, three, also lack safety and stability in the operation of current chimney.
To sum up, how to have planned that the Selection and Design of chimney and specific construction are real in steam power plant's first stage of construction and enlarging
Apply scheme, to steam power plant's actual motion, meet enlarging demand and reducing the construction costs it is all particularly significant, guarantee design requirement
Under the premise of, to obtain better economy.
Utility model content
The purpose of this utility model is to provide a kind of single-drum chimneys needed suitable for steam power plant's built by separate periods, solve
There are problems in built by separate periods.One, chimney bore size issue, if build it is too big if in exhanst gas outlet flow velocity lower than relevant design
Standard limited value, bore is too small, is unfavorable for extending in the future.Two, due to built by separate periods, flue gas flow rate exists not under different operating conditions
How same speed controls flue gas flow rate to reach standard be also a problem.Three, since steam power plant's unit is larger, required chimney
Height wants high, built by separate periods project chimney formal character sleeve chimney, but for the single-drum chimney that compares, and cost wants high, builds
Program is complicated, can not also be suitable for built by separate periods with regard to current single-drum chimney.Four, chimney there are problems that safety and stability and
Steam power plant there are problems that rebuilding risk and bring economy.
It is built by stages in order to achieve the above object, the major technique solution of the utility model is to provide one kind suitable for steam power plant
If single-drum chimney, which includes multiple merogenesis stack shells, which is equipped with a chimney breast, and feature exists
In the single-drum chimney further includes at least one air door, and the air door is fixedly connected on the inside of the merogenesis stack shell, the air door
For semi-enclosed air door.
Further, the semi-enclosed air door includes outer ring, multiple shafts and multiple adjusting blades, and the one of the shaft
End is flexibly connected with the outer ring, and the adjusting blade is fixedly connected with the shaft, and the adjusting blade is revolved around the shaft
Turn, the adjusting blade changes between half-open position, full-gear and closed state.
Further, when the adjusting blade is half-open position, each adjusting blade all constitutes one with the outer ring
A incline structure.
Further, when the adjusting blade is full-gear, each adjusting blade all constitutes one with the outer ring
A vertical structure.
Further, when the adjusting blade is in off state, each adjusting blade keeps horizontal, described at this time
It adjusts blade and forms a circular ring structure.
Further, the outer diameter of the outer ring is less than the internal diameter of the merogenesis stack shell, and welds with the merogenesis stack shell top
It connects securely, the shaft is horizontally disposed along the outer ring radial symmetric.
Further, the outer diameter for adjusting blade is less than the outer ring internal diameter, and internal diameter is not less than the outer ring internal diameter
2/3.
Have in some embodiments, the semi-enclosed air door is round semi-enclosed air door.
Further, the adjusting blade is ring structure.
Further, the bottom side of the merogenesis stack shell is equipped with smoke inlet.
The beneficial effects of the utility model are: one, the utility model makes steam power plant can choose construction in first stage of construction
The more chimney of large outlet diameter allows chimney to be well adapted for unit during extending from project initial stage to later period different
Operating load operating condition has widened chimney to the receiving range of flue gas flow significantly.
Two, because adapt to different operating load operating conditions, first stage of construction is avoided, not due to flue gas flow rate and pressure
Foot leads to the generation of cold air reverse irrigation phenomenon.
Three, make single-drum chimney also can reduce the cost of construction preferably suitable for the project of built by separate periods, increase warp
Ji property effect.
Four, the utility model can reserve more enlarging spaces in the case where that can not determine later period construction scale,
The secondary risks of construction of steam power plant's chimney are evaded, to reduce construction cost, have also extended the seeervice cycle of design, has improved
Economic performance.
Five, after built by separate periods is completed, reconstruction risk has been evaded and has controlled flue gas flow rate, so that chimney service ability
Reinforce, therefore the safety and stability of chimney construction also improves.
Detailed description of the invention
Fig. 1 is the structural schematic diagram of an embodiment of the present invention,
Fig. 2 is the air door structure schematic diagram of Fig. 1 embodiment,
Fig. 3 is the half-open position structural schematic diagram of Fig. 1 embodiment,
Fig. 4 is the closed state structural schematic diagram of Fig. 1 embodiment,
Fig. 5 is the full-gear structural schematic diagram of Fig. 1 embodiment,
In figure: smoke inlet 1, air door 3, shaft 4, outer ring 5, adjusts blade 6, chimney breast 7 at merogenesis stack shell 2.
Specific embodiment
The following will be combined with the drawings in the embodiments of the present invention, carries out the technical scheme in the embodiment of the utility model
Clearly and completely describe, it is clear that the described embodiments are only a part of the embodiments of the utility model, rather than whole
Embodiment.Based on the embodiments of the present invention, those of ordinary skill in the art's every other embodiment obtained, all belongs to
In the range of the utility model protection.
Built by separate periods refers to the bigger requirement of engineering of the construction volume very long working life to complete either to have completed
Requirement of engineering is extended again, and the construction of both modes can be carried out by stages building.On the whole, thermoelectricity factory engineering
A typically huger engineering, the general original according to " unified planning is implemented step by step, electricity determining by heat, on a fairly large scale "
Then, the actual conditions developed in conjunction with block thermic load, to carry out built by separate periods.
The main exit that chimney discharges pollutants as steam power plant plays very important status in steam power plant's construction,
For steam power plant, built by separate periods can make it rapidly enter working condition, and not influence the heat of using of neighbouring enterprise, and
Sustained economic growth nearby is driven as soon as possible, and the facility that can also constantly improve steam power plant improves construction, improves each presence
The place of defect, therefore, built by separate periods are the trend in domestic construction industry, but traditional chimney is not particularly suited for building by stages at present
If the chimney that development and creation are suitable for built by separate periods is thing urgent at present.
As shown in Figure 1, a kind of single-drum chimney suitable for steam power plant's built by separate periods described in the present embodiment is demonstrated, it should
Single-drum chimney includes merogenesis stack shell 2, which is equipped with chimney breast 7, but due to the structure of stack shell be not intended as it is practical
Novel key content, therefore do not highlight.
As shown in Figure 1 to Figure 2, which further includes at least one air door 3, and the air door 3 is fixedly connected on merogenesis
The inside of stack shell 2 it is necessary to explanation is here to be related at least one air door 3 due to the present embodiment, and air door 3 installs merogenesis stack shell
The 2 each places of inside bore, including chimney breast 7, the air door 3 is semi-enclosed air door.Being worth mentioning is, this is practical
One air door 3 of setting is the emphasis structure suitable for steam power plant's built by separate periods inside novel single-drum chimney, and air door 3 can control cigarette
The flow velocity of chimney flue gas, in built by separate periods, standard is also not achieved certainly in the flow velocity of chimney smoke, adjusts flow velocity with air door 3, makes
Steam power plant can choose the chimney of construction more large outlet diameter in first stage of construction, can be well adapted for from project initial stage to rear
The different operating load operating condition of unit during phase enlarging, has widened chimney to the receiving range of flue gas flow significantly, can not
In the case where determining later period construction scale, more enlarging spaces can be reserved.
In the case where the exit caliber of chimney selects biggish design value, even if steam power plant runs after the completion of preliminary engineering
In running on the lower load, air door 3 can be in close state at this time, i.e. ,=adjusting blade 6 keeps a horizontal structure, then adjusting
It saves blade 6 and forms an annulus, although inevitable that certain velocity jump, semienclosed structure can still protect
Larger ventilation quantity is held, can effectively ensure that the performance that pulls up of chimney, and the process that flue gas accelerates is by being arranged in different height
Air door 3 is completed step by step, to promote the stability and safety of chimney.
Further, the semi-enclosed air door includes that outer ring 5, at least eight shafts 4 and at least eight adjust blades 6,
One end of the shaft 4 is flexibly connected with outer ring 5, and the adjusting blade 6 is to be fixedly connected with shaft 4, and shaft 4 drives when rotating
It adjusts blade 6 to rotate together, adjust between blade 6 there are gap, this is the organization plan of air door 3 in the present embodiment, but not
It is only limitted to this structure.
Further, the outer ring 5 be 20mm steel plate roll, and with the 2 top firm welding of merogenesis stack shell, point
Doughnut-shaped steel plate, outer ring 5 and doughnut-shaped steel plate firm welding are embedded at the top of section stack shell 2, the outer diameter of the outer ring 5 is less than merogenesis stack shell
2 outer diameter, outer ring 5 primarily serve the effect being fixed on entire air door 3 in merogenesis stack shell 2.
Further, the shaft 4 is horizontally disposed along 5 radial symmetric of outer ring, and interval angles are according to 5 diameter of outer ring
Adjustment, due to the chimney of built by separate periods to be suitable for, the shape of chimney is generally frustum cone structure, in other words, as one end is big
One end is small, therefore also just determines the size of 5 diameter of outer ring, and 5 diameter of outer ring can also determine shaft 4 and adjust blade
6 quantity, interval angles will also adjust between shaft 4 and shaft 4 between adjusting blade 6 and adjusting blade 6, but protect
The single outer arc length for adjusting blade 6 of card is no more than 1000mm, also just explains its interval angles in summary according to 5 diameter of outer ring
The reasons why adjustment.
Further, the outer diameter for adjusting blade 6 is less than 5 internal diameter of outer ring, but its internal diameter is not less than stating in outer ring 5
The 2/3 of diameter, adjusting blade 6 is supported by thick steel plate, and the surface for adjusting blade 6 is smooth, and surface is smooth primarily to subtracting
Resistance when few flue gas flow rate, all blades just form annulus, in order to make that a fixed spacing is kept to prevent from colliding between blade, institute
Stating adjusting blade 6 can rotate around the shaft 4.The adjusting blade 6 has different states under different operating conditions, and can be not
With changing under state.When initial stage engineering construction is completed, it is half-open position that chimney, which is in accidental conditions, adjusts blade at this time
6 with 5 structure of outer ring at a tilt angle, flue gas will form small cyclone, work as chimney by the air door 3 under half-open position
It is in off state under running on the lower load, all adjusting blades 6 keep horizontal at this time, still there is biggish ventilation quantity, flue gas
Or it can pass through in inner circle from adjusting in the annulus that blade 6 is formed.After the completion of the second stage of the project, chimney, which is in, operates normally work
Condition is full-gear, and at this time so blade constitutes a vertical angle with outer ring 5, flue gas relatively large can pass through air door 3, cigarette
The case where when chimney is under running on the lower load, completes later accidental conditions, therefore cigarette substantially close to first stage of the project construction
Chimney is half-open position, at this time adjust blade 6 with 5 structure of outer ring at a tilt angle, flue gas passes through the air door 3 under half-open position
Outflow, will form helical structure, and flow velocity is made to become steady.
Have in some embodiments, the semi-enclosed air door is round semi-enclosed air door, because the shape of air door 3 is main
It is to be determined by the shape of chimney, most chimney is all cylinder-shaped, but is not excluded for rectangular chimney.
Further, the adjusting blade 6 is ring structure, can reach semiclosed effect, when adjusting blade is horizontal,
The structure of an annulus can be formed.
Further, the bottom side of the merogenesis stack shell is equipped with smoke inlet.
Working principle: it as shown in figure 3, after the completion of the first stage project construction, since engineering only completes primary construction, examines
Consider the enlarging in later period and build problem again, the throat of first phase construction can construction as far as possible it is big, extend for the later period and build again
It is ready, but it is exactly that flue gas flow rate is not inconsistent standardization that this, which can also lead to the problem of one, the chimney that initial stage builds up can also be stablized
Property and safety be also that there is hidden danger, it is semiclosed at this time by control therefore under the accidental conditions after having built in the early stage
Formula air door is adjusted to half-open position from closed state, in other words, the adjusting blade 6 for keeping horizontal structure is adjusted to adjust blade
6 and 5 structure of outer ring structure at a tilt angle, at this moment flue gas enters from chimney entrance, by the chimney bore gradually reduced,
Suction by chimney itself because pulling out the generation of wind effect, speed are gradually increased, in the semiclosed air door by being in half-open position
When, due to each adjusting blade 6 in air door 3 with 5 structure of outer ring at a tilt angle, the flue gas passed through at this time circulates to be formed
The construction of small cyclone, speed transition can be more steady, the wind speed of standard finally reached in exit, it is rear for both having met
Phase extends the bore being ready, but also the stability of chimney and safety are unaffected.
As shown in figure 4, when steam power plant is under underrun operating condition, since there are also very big for the carrying peak load from it
Space, generate flue gas may not be it is very much, flue gas flow rate does not reach standard at this time, and due to internal pressure
Small, therefore multiple semi-enclosed wind can be arranged in the generation that will lead to cold air reverse irrigation phenomenon inside merogenesis monotubular 2 first
Door, semi-enclosed air door adjustment is in off state at this time, and in other words, the adjusting blade 6 in air door 3 keeps a level at this time
State, since flue gas is fewer, the flue gas of rising is obstructed at air door 3, and the speed of flue gas can generate certain mutation at this time, but
Itself biggish ventilation quantity can be still kept in the off state, can effectively ensure that the lifting performance of flue gas, and because merogenesis monotubular 2
Inside is provided with multiple semi-enclosed air doors and is distributed in chimney, can complete the acceleration mode of flue gas step by step, to protect
It demonstrate,proves wind speed at final outlet and is greater than desired wind speed lower limit, to reach velocity standard, and because semi-enclosed air door is to close shape
State, outside air into not come, thus avoid cold air flow backward phenomenon generation.
As shown in figure 5, when enlarging or build after the completion of engineering construction again, under accidental conditions, semi-enclosed wind at this time
Door is in close to full-gear, and in other words, each adjustings blade 6 is with one vertical structure of the holding of outer ring 5, that is at this time
Flue gas flow is the largest.In low- load conditions, the case where when, is later normal substantially close to completing with first stage of the project construction
Operating condition, therefore chimney is half-open position, adjust at this time blade 6 with 5 structure of outer ring at a tilt angle, cigarette is by half-open
Air door 3 under state flows out, and will form helical structure, is that flow velocity becomes steady.Since initial design chimney exit diameter selects
It is larger, can meet the needs of flue gas emission well, chimney breast flow velocity is within OK range.
The utility model is not limited to above-mentioned preferred forms, anyone can obtain under the enlightenment of the utility model
Other various forms of products, however, make any variation in its shape or structure, it is all that there is same as the present application or phase
Approximate technical solution, all falls within the protection scope of the utility model.
Claims (10)
1. a kind of single-drum chimney suitable for steam power plant's built by separate periods, which includes multiple merogenesis stack shells (2), the monotubular
Chimney is equipped with a chimney breast (7), which is characterized in that the single-drum chimney further includes at least one air door (3), the air door
(3) it is fixedly connected on the inside of the merogenesis stack shell (2), the air door (3) is semi-enclosed air door.
2. the single-drum chimney according to claim 1 suitable for steam power plant's built by separate periods, which is characterized in that described semiclosed
Formula air door includes outer ring (5), multiple shafts (4) and multiple adjusting blades (6), one end and the outer ring (5) of the shaft (4)
It is flexibly connected, the adjusting blade (6) is fixedly connected with the shaft (4), and the adjusting blade (6) is revolved around the shaft (4)
Turn, the adjusting blade (6) changes between half-open position, full-gear and closed state.
3. the single-drum chimney according to claim 2 suitable for steam power plant's built by separate periods, which is characterized in that the adjusting leaf
When piece (6) is half-open position, each adjusting blade (6) all constitutes an incline structure with the outer ring (5).
4. the single-drum chimney according to claim 2 suitable for steam power plant's built by separate periods, which is characterized in that the adjusting leaf
When piece (6) is full-gear, each adjusting blade (6) all constitutes a vertical structure with the outer ring (5).
5. the single-drum chimney according to claim 2 suitable for steam power plant's built by separate periods, which is characterized in that the adjusting leaf
When piece (6) is in off state, each adjusting blade (6) keeps horizontal, and the adjusting blade (6) forms a circle at this time
Ring structure.
6. the single-drum chimney according to claim 2 suitable for steam power plant's built by separate periods, which is characterized in that the outer ring
(5) outer diameter is less than the internal diameter of the merogenesis stack shell (2), and with firm welding at the top of the merogenesis stack shell (2), the shaft
(4) along the outer ring (5), radial symmetric is horizontally disposed.
7. the single-drum chimney according to claim 2 suitable for steam power plant's built by separate periods, which is characterized in that the adjusting leaf
The outer diameter of piece (6) is less than the outer ring (5) internal diameter, and internal diameter is not less than the 2/3 of the outer ring (5) internal diameter.
8. the single-drum chimney according to claim 1 suitable for steam power plant's built by separate periods, which is characterized in that described semiclosed
Formula air door is round semi-enclosed air door.
9. the single-drum chimney according to claim 7 suitable for steam power plant's built by separate periods, which is characterized in that the adjusting leaf
Piece (6) is ring structure.
10. special according to claim 1 to any single-drum chimney suitable for steam power plant's built by separate periods of claim 9
Sign is that the bottom side of the merogenesis stack shell (2) is equipped with smoke inlet (1).
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820270961.8U CN208205044U (en) | 2018-02-26 | 2018-02-26 | A kind of single-drum chimney suitable for steam power plant's built by separate periods |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820270961.8U CN208205044U (en) | 2018-02-26 | 2018-02-26 | A kind of single-drum chimney suitable for steam power plant's built by separate periods |
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| CN208205044U true CN208205044U (en) | 2018-12-07 |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108332225A (en) * | 2018-02-26 | 2018-07-27 | 浙江城建煤气热电设计院有限公司 | A kind of single-drum chimney suitable for steam power plant's built by separate periods |
| CN113154422A (en) * | 2021-04-14 | 2021-07-23 | 山东国舜建设集团有限公司 | Construction process for adding baffle door to steel chimney and chimney structure thereof |
-
2018
- 2018-02-26 CN CN201820270961.8U patent/CN208205044U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108332225A (en) * | 2018-02-26 | 2018-07-27 | 浙江城建煤气热电设计院有限公司 | A kind of single-drum chimney suitable for steam power plant's built by separate periods |
| CN113154422A (en) * | 2021-04-14 | 2021-07-23 | 山东国舜建设集团有限公司 | Construction process for adding baffle door to steel chimney and chimney structure thereof |
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Address after: 310000 No. 81 Qingchi Road, Sandun Town, Xihu District, Hangzhou City, Zhejiang Province Patentee after: Zhejiang Chengjian Gas Thermal Power Design Institute Co.,Ltd. Address before: 310030 No. 81, Qingchi Road, Sandun Town, Xihu District, Hangzhou City, Zhejiang Province Patentee before: ZHEJIANG GAS & THERMOELECTRICITY DESIGN INSTITUTE CO.,LTD. |