CN114151814A - Back-out side-in multistage adjustable depth peak regulation bypass flue system - Google Patents
Back-out side-in multistage adjustable depth peak regulation bypass flue system Download PDFInfo
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- CN114151814A CN114151814A CN202111535141.XA CN202111535141A CN114151814A CN 114151814 A CN114151814 A CN 114151814A CN 202111535141 A CN202111535141 A CN 202111535141A CN 114151814 A CN114151814 A CN 114151814A
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- flue
- depth
- flue gas
- entry
- bypass
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23J—REMOVAL OR TREATMENT OF COMBUSTION PRODUCTS OR COMBUSTION RESIDUES; FLUES
- F23J11/00—Devices for conducting smoke or fumes, e.g. flues
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23J—REMOVAL OR TREATMENT OF COMBUSTION PRODUCTS OR COMBUSTION RESIDUES; FLUES
- F23J13/00—Fittings for chimneys or flues
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23J—REMOVAL OR TREATMENT OF COMBUSTION PRODUCTS OR COMBUSTION RESIDUES; FLUES
- F23J13/00—Fittings for chimneys or flues
- F23J13/08—Doors or covers specially adapted for smoke-boxes, flues, or chimneys
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23J—REMOVAL OR TREATMENT OF COMBUSTION PRODUCTS OR COMBUSTION RESIDUES; FLUES
- F23J15/00—Arrangements of devices for treating smoke or fumes
- F23J15/08—Arrangements of devices for treating smoke or fumes of heaters
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Chimneys And Flues (AREA)
Abstract
The invention discloses a back-in and back-in multistage adjustable depth peak regulation bypass flue system, which comprises a bypass flue main body section, a multi-section depth diversion box and a flue gas uniform mixer, wherein the bypass flue main body section is provided with a plurality of stages of depth peak regulation diversion boxes; turn to and be provided with the eccentric interface of drawing forth of heavy grade on the room, the eccentric interface of drawing forth of heavy grade is linked together through bypass flue main part section and the entry of multistage depth baffle box, the exit of multistage depth baffle box is provided with the hood, wherein, the outside of denitration entry flue is arranged in to one side of multistage depth baffle box entry, one side of multistage depth baffle box exit is inserted in denitration entry flue, flue gas homomixer is located the top of multistage depth baffle box, flue gas homomixer is located denitration entry flue, the flue gas temperature of denitration entrance can be promoted to this system.
Description
Technical Field
The invention belongs to the technical field of deep peak regulation, and relates to a multi-stage adjustable deep peak regulation bypass flue system at the rear inlet side and the rear outlet side.
Background
The method solves the problem of increasingly serious wind (light and water) abandonment, improves the consumption capacity of new energy, and tries to improve the operation flexibility and the deep peak regulation capacity of the thermal power generating unit. When the thermal power generating unit has a wider load adjusting range and the lower load limit is adjusted from 45% to 30% or even lower, the smoke temperature of the outlet flue of the economizer is usually lower than 300 ℃, and the operation requirement of the denitration catalyst cannot be met.
With the continuous improvement of the requirements for the flexibility modification and the participation of deep peak shaving of thermal power, the new 30 ten thousand units and 60 ten thousand units are also added into the modification ranks. The side wall of the shaft flue at the tail part of the unit boiler is generally provided with a plurality of layers of soot blowers, and after the boiler part and the denitration part are integrally and compactly designed, the traditional high-temperature bypass flue cannot be arranged. Therefore, a new deep peak regulation bypass flue system is needed to be developed to improve the denitration inlet flue gas temperature and better serve the flexibility improvement of future thermal power generating units.
Disclosure of Invention
The invention aims to overcome the defects of the prior art and provides a depth peak-shaving bypass flue system with adjustable rear inlet and rear inlet sides, which can improve the flue gas temperature at a denitration inlet.
In order to achieve the aim, the back-inlet and side-inlet multistage adjustable depth peak regulation bypass flue system comprises a bypass flue main body section, a multi-section depth diversion box and a flue gas uniform mixer;
the steering room is provided with a large-gradient eccentric leading-out interface, the large-gradient eccentric leading-out interface is communicated with an inlet of the multi-section deep flow guide box through a main body section of the bypass flue, an air cap is arranged at an outlet of the multi-section deep flow guide box, wherein one side of the inlet of the multi-section deep flow guide box is arranged outside the denitration inlet flue, one side of the outlet of the multi-section deep flow guide box is inserted into the denitration inlet flue, the flue gas uniform mixer is positioned above the multi-section deep flow guide box, and the flue gas uniform mixer is positioned in the denitration inlet flue.
The bypass flue main body section comprises an inclined section flue and a vertical flue which are sequentially arranged along the flue gas direction.
Elbows are arranged between the oblique section flue and the first expansion joint, between the oblique section flue and the vertical flue and between the vertical flue and the second expansion joint.
The included angle between the inclined section flue and the vertical flue is more than or equal to 120 degrees.
The large-gradient eccentric leading-out interface is communicated with the inlet of the multi-section deep diversion box through a shutoff door, an adjusting baffle door, a first expansion joint, a bypass flue main body section and a second expansion joint.
And each section of the deep diversion box in the multi-section deep diversion box is provided with a multi-stage independent control adjusting baffle.
The mixed flue gas temperature measuring device is positioned above the flue gas uniform mixer, and the flue gas uniform mixer and the mixed flue gas temperature measuring device are positioned in the denitration inlet flue.
The device also comprises a controller, and the controller is connected with the mixed flue gas temperature measuring device, the shutoff door, the adjusting baffle door and the multi-stage independent control adjusting baffle.
The hood adopts a chess piece type design.
The invention has the following beneficial effects:
when the multi-stage adjustable depth peak regulation bypass flue system at the rear inlet and the rear outlet is in specific operation, high-temperature flue gas in a steering chamber is led out from a large-gradient eccentric leading-out interface, the led-out flue gas flows through a bypass flue main body section and is sent to the side surface of a denitration inlet flue, then is sprayed into the denitration inlet flue through a multi-section deep diversion box 7, and then is uniformly mixed with main flue gas through a flue gas uniform mixer, so that the purposes of improving the temperature of the flue gas and improving the uniformity of temperature field distribution in the denitration inlet flue are achieved.
Drawings
FIG. 1 is a schematic structural view of the present invention;
FIG. 2 is a cross-sectional view taken along line A-A of FIG. 1;
fig. 3 is a structural view of the multi-stage depth diversion box 7;
fig. 4 is a top view of the multi-sectional depth baffle box 7;
fig. 5 is a structural view of the hood 9.
Wherein, 1 is the eccentric interface of drawing forth of heavy grade, 2 is the shutoff door, 3 is the regulation damper door, 4 is first expansion joint, 5 is bypass flue main part section, 5a is the elbow, 5b is the oblique section flue, 5c is vertical flue, 6 is the second expansion joint, 7 is multistage depth baffle box, 8 is multistage independent control regulation damper, 9 is the hood, 10 is flue gas homogeneous mixer, 11 is mixed flue gas temperature measuring device, 12 is the controller.
Detailed Description
In order to make the technical solutions of the present invention better understood, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, not all of the embodiments, and are not intended to limit the scope of the present disclosure. Moreover, in the following description, descriptions of well-known structures and techniques are omitted so as to not unnecessarily obscure the concepts of the present disclosure. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
There is shown in the drawings a schematic block diagram of a disclosed embodiment in accordance with the invention. The figures are not drawn to scale, wherein certain details are exaggerated and possibly omitted for clarity of presentation. The shapes of various regions, layers and their relative sizes and positional relationships shown in the drawings are merely exemplary, and deviations may occur in practice due to manufacturing tolerances or technical limitations, and a person skilled in the art may additionally design regions/layers having different shapes, sizes, relative positions, according to actual needs.
Referring to fig. 1 to 5, the rear-inlet and rear-outlet side multistage adjustable depth peak-shaving bypass flue system of the present invention includes a shutoff door 2, an adjusting damper 3, a first expansion joint 4, a bypass flue main body section 5, a second expansion joint 6, a multi-section depth diversion box 7, a multistage independent control adjusting damper 8, a flue gas uniform mixer 10, a mixed flue gas temperature measuring device 11 and a controller 12;
the steering chamber is provided with a large-gradient eccentric leading-out interface 1, the large-gradient eccentric leading-out interface 1 is communicated with the inlet of the multi-section deep flow guide box 7 through a shutoff door 2, an adjusting baffle door 3, a first expansion joint 4, a bypass flue main body section 5 and a second expansion joint 6, an air cap 9 is arranged at the outlet of the multi-section deep flow guide box 7, and each section of deep flow guide box in the multi-section deep flow guide box 7 is provided with a multi-stage independently controlled adjusting baffle 8;
the bypass flue main body section 5 comprises an inclined section flue 5b and a vertical flue 5c which are sequentially arranged along the flue gas direction, wherein elbows 5a are arranged between the inclined section flue 5b and the first expansion joint 4, between the inclined section flue 5b and the vertical flue 5c and between the vertical flue 5c and the second expansion joint 6.
The included angle between the inclined section flue 5b and the vertical flue 5c is more than or equal to 120 degrees.
In addition, one side of the inlet of the multi-section deep flow guide box 7 is arranged at the outer side of the denitration inlet flue, one side of the outlet of the multi-section deep flow guide box 7 is inserted into the denitration inlet flue, the flue gas uniform mixer 10 is positioned above the multi-section deep flow guide box 7, the mixed flue gas temperature measuring device 11 is positioned above the flue gas uniform mixer 10, the flue gas uniform mixer 10 and the mixed flue gas temperature measuring device 11 are positioned in the denitration inlet flue, and during actual work, the high-temperature bypass flue gas deep injection distribution proportion is controlled through the multi-stage independent control adjusting baffle 8; the controller 12 is connected with the mixed flue gas temperature measuring device 11, the shutoff door 2, the adjusting baffle door 3 and the multi-stage independent control adjusting baffle 8.
The hood 9 adopts the design of piece type, is favorable to alleviateing wearing and tearing and deposition, and the flue gas of 9 cap posts side spun from the hood primarily mixes with the main flue gas of denitration entry flue, and the flue gas after the mixing flows through flue gas homomixer 10 afterwards, is measured the temperature by mixing flue gas temperature measuring device 11 after the flue gas homomixer 10 misce bene again.
The controller 12 receives the output signal of the mixed flue gas temperature measuring device 11, and automatically controls the opening of the adjusting baffle door 3 and the multi-stage independent control adjusting baffle 8 so as to adjust the flue gas flow and automatically adjust the temperature uniformity of the mixed flue gas.
It should be noted that the expansion joint is added to optimize the design scheme of the support crane, so as to meet the requirement of the self thermal displacement of the flue.
In addition, under the condition that the field condition allows, the flue structure is optimized, the circular bypass flue is adopted to replace the rectangular bypass flue, and when the flow areas are the same, the circular flue has the advantages of less steel consumption, more flexible flue trend arrangement, less flue resistance and the like compared with the rectangular flue.
The specific working process of the invention is as follows:
when the unit is in low-load operation and the smoke temperature of the denitration inlet flue does not meet the design temperature of the denitration reactor, the shutoff door 2 is opened, high-temperature smoke in the steering chamber is led out through the large-gradient eccentric leading-out interface 1, the smoke taking amount is controlled by adjusting the baffle opening degree of the adjusting baffle door 3, the led-out smoke flows through the bypass flue main body section 5 and is sent to the side surface of the denitration inlet flue, the flow is adjusted by the multistage independent control adjusting baffle 8 and then is sent into the multistage longitudinal diversion box 7 in a segmented mode, the smoke is sprayed into the denitration inlet flue from the side surface of the blast cap 9 arranged at the corresponding outlet of each section of the longitudinal diversion box and is uniformly mixed with main smoke through the smoke uniform mixer 10, and therefore the effects of improving the smoke temperature and improving the uniformity of the temperature field distribution in the denitration inlet flue are achieved.
The controller 12 receives the output signal of the mixed flue gas temperature measuring device 11, and automatically adjusts the opening and closing of the shutoff door 2, the adjusting damper door 3 and the baffle opening degree of the multi-stage independent control adjusting damper 8, so as to control the flow distribution of high-temperature flue gas injected into the denitration inlet flue, and achieve the purpose of improving the distribution uniformity of the temperature field in the denitration inlet flue while improving the flue gas temperature.
Finally, the invention fully utilizes the upper part and the side space of the denitration inlet flue, innovatively leads the high-temperature flue gas in the boiler steering chamber into the denitration inlet flue, and injects the high-temperature flue gas into the denitration inlet flue to be mixed with the main flue gas. The design of the flue in the system reduces the length of the horizontal flue as much as possible, and can effectively prevent a large amount of dust from generating adverse effects on the flue body and the steel structure. In addition, high-temperature flue gas is injected into a denitration inlet flue in a segmented and deep manner through a multi-segment deep flow guide box 7; meanwhile, the blast cap 9 is arranged, the blast cap 9 adopts a chess piece type design, abrasion and dust deposition are favorably reduced, and smoke can be more fully mixed when smoke is discharged laterally. Make high temperature flue gas fully mix with microthermal main road flue gas through flue gas homomixer 10, effectively promote denitration entry flue gas temperature to denitration demand and improve the homogeneity of temperature field distribution in the denitration entry flue, in addition, utilize mixed flue gas temperature measuring device 11 to detect the temperature data that obtains and carry out feedback control, realize entire system's automatically regulated, the controllability of optimizing system reduces the cost of labor.
Claims (9)
1. A multi-stage adjustable depth peak regulation bypass flue system at the rear inlet and the rear inlet is characterized by comprising a bypass flue main body section (5), a multi-section depth diversion box (7) and a flue gas uniform mixer (10);
turn to and be provided with the eccentric interface (1) of drawing forth of heavy grade on the room, the eccentric interface (1) of drawing forth of heavy grade is linked together through bypass flue main part section (5) and the entry of multistage depth baffle box (7), the exit of multistage depth baffle box (7) is provided with hood (9), wherein, denitration entry flue's the outside is arranged in to one side of multistage depth baffle box (7) entry, one side of multistage depth baffle box (7) export is inserted in denitration entry flue, flue gas homogeneous mixer (10) are located the top of multistage depth baffle box (7), flue gas homogeneous mixer (10) are located denitration entry flue.
2. The rear-entry side multi-stage adjustable depth peaking bypass flue system of claim 1, wherein the bypass flue main body section (5) includes an inclined section flue (5b) and a vertical flue (5c) sequentially arranged along a flue gas direction.
3. The rear-entry side multi-stage adjustable depth peaking bypass flue system of claim 2, wherein elbows (5a) are disposed between the diagonal segment flue (5b) and the first expansion joint (4), between the diagonal segment flue (5b) and the vertical flue (5c), and between the vertical flue (5c) and the second expansion joint (6).
4. The rear-entry side multi-stage adjustable depth peaking bypass flue system of claim 2, wherein an angle between the diagonal segment flue (5b) and the vertical flue (5c) is greater than or equal to 120 °.
5. The rear-inlet side multi-stage adjustable depth peak-shaving bypass flue system as claimed in claim 1, wherein the large-gradient eccentric leading-out interface (1) is communicated with the inlet of the multi-stage depth diversion box (7) through a shutoff door (2), an adjusting baffle door (3), a first expansion joint (4), a bypass flue main body section (5) and a second expansion joint (6).
6. The back-inlet side-entry multi-stage adjustable depth peak-shaving bypass flue system according to claim 5, wherein each of the multi-stage depth guide boxes (7) is provided with a multi-stage independently-controlled adjusting baffle (8).
7. The rear-inlet side multi-stage adjustable depth peak-shaving bypass flue system as claimed in claim 6, wherein the mixed flue gas temperature measuring device (11) is located above the flue gas homomixer (10), and the flue gas homomixer (10) and the mixed flue gas temperature measuring device (11) are located in the denitration inlet flue.
8. The rear-entry side-entry multi-stage adjustable depth peaking bypass flue system of claim 7, further comprising a controller (12), wherein the controller (12) is connected with the mixed flue gas temperature measuring device (11), the shutoff door (2), the adjusting damper door (3) and the multi-stage independent control adjusting damper (8).
9. The rear-entry side multi-stage adjustable depth peaking bypass stack system of claim 1, wherein the hood (9) is of a chessman type design.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111535141.XA CN114151814A (en) | 2021-12-15 | 2021-12-15 | Back-out side-in multistage adjustable depth peak regulation bypass flue system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111535141.XA CN114151814A (en) | 2021-12-15 | 2021-12-15 | Back-out side-in multistage adjustable depth peak regulation bypass flue system |
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| Publication Number | Publication Date |
|---|---|
| CN114151814A true CN114151814A (en) | 2022-03-08 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202111535141.XA Pending CN114151814A (en) | 2021-12-15 | 2021-12-15 | Back-out side-in multistage adjustable depth peak regulation bypass flue system |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114870560A (en) * | 2022-05-30 | 2022-08-09 | 西安西热锅炉环保工程有限公司 | Full-load denitration bypass flue system coupled with urea hydrolysis and working method thereof |
| CN117053202A (en) * | 2023-10-13 | 2023-11-14 | 陕西宝昱科技工业股份有限公司 | Heat recovery equipment of incinerator and heat recovery temperature control method thereof |
-
2021
- 2021-12-15 CN CN202111535141.XA patent/CN114151814A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114870560A (en) * | 2022-05-30 | 2022-08-09 | 西安西热锅炉环保工程有限公司 | Full-load denitration bypass flue system coupled with urea hydrolysis and working method thereof |
| CN117053202A (en) * | 2023-10-13 | 2023-11-14 | 陕西宝昱科技工业股份有限公司 | Heat recovery equipment of incinerator and heat recovery temperature control method thereof |
| CN117053202B (en) * | 2023-10-13 | 2023-12-08 | 陕西宝昱科技工业股份有限公司 | Heat recovery equipment of incinerator and heat recovery temperature control method thereof |
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