CN218544481U

CN218544481U - Hearth outlet flue capable of improving steam temperature adjusting effect of flue gas temperature adjusting baffle

Info

Publication number: CN218544481U
Application number: CN202222929142.9U
Authority: CN
Inventors: 吴海赟; 徐伟俊; 诸育枫
Original assignee: Shanghai Boiler Works Co Ltd
Current assignee: Shanghai Boiler Works Co Ltd
Priority date: 2022-11-02
Filing date: 2022-11-02
Publication date: 2023-02-28
Anticipated expiration: 2032-11-02

Abstract

The utility model provides an improve furnace outlet flue of flue gas thermoregulation baffle steam temperature regulation effect relates to the boiler field, divide out two at least way branch pipes with the flue gas import department of horizontal segment outlet flue, and the cross-sectional area of branch pipe is less than the cross-sectional area of horizontal segment outlet flue, the exit and the flue gas thermoregulation baffle of branch pipe are connected, the circulation cross-section of the flue gas that makes reheater and over heater flow through the baffle diminishes, the flue gas velocity of flow has correspondingly been improved under the condition that satisfies the standard requirement, make the flue gas thermoregulation baffle can obtain better regulation effect. Meanwhile, the smoke circulation cross section of the reheater corresponding to the superheater is reduced, and the size of the smoke adjusting baffle plate is also reduced, so that the number of actuating mechanisms required to be controlled is reduced, and the production cost of equipment is reduced. In addition, the flue gas temperature adjusting baffle is arranged in the horizontal section outlet flue, so that the length of the vertical section outlet flue can be reduced, the height of the boiler is reduced, and the economical efficiency of the boiler is improved.

Description

Hearth outlet flue for improving steam temperature adjusting effect of flue gas temperature adjusting baffle

Technical Field

The utility model belongs to the boiler field especially relates to an improve furnace outlet flue of flue gas thermoregulation baffle steam temperature regulation effect.

Background

The boiler furnace outlet is provided with a flue gas temperature adjusting baffle, and the amount of flue gas flowing through the reheater and the superheater is controlled by controlling the opening of the flue gas temperature adjusting baffle, so that the purposes of controlling the steam outlet temperature of the reheater and adjusting the temperature of reheated steam are achieved.

The key of the temperature regulation performance of the baffle is the change characteristic of the flue gas flow along with the opening of the flue gas baffle and the change characteristic of the reheated steam temperature along with the opening of the flue gas baffle. The two characteristics of the baffle are related to the resistance characteristic of the baffle, and are influenced by the flow area of the flue gas on the section where the baffle is located and the structural size of the flue to a great extent. The tower boiler temperature regulation baffle is conventionally arranged on the upper parts of the reheater and the superheater and has the same size with the section of the hearth, and because the section has larger size, the flow velocity of flue gas is lower, and an ideal regulation effect cannot be obtained. Meanwhile, in consideration of transportation size, the baffle with the cross section size of 20 × 20 m is often divided into a plurality of units with the width of about 3 m, each unit needs to be provided with 2 actuators, and the furnace needs to be provided with 12 actuators (6 actuators on the reheater side and the superheater side respectively), so that the equipment cost is increased.

SUMMERY OF THE UTILITY MODEL

To exist not enough among the prior art, the utility model aims to provide a can improve furnace outlet flue of flue gas temperature regulation baffle vapour temperature regulation effect to solve the problem that proposes among the above-mentioned background art.

For the above-mentioned purpose, the utility model provides an improve furnace export flue of flue gas thermoregulation baffle steam temperature regulation effect, furnace export flue include vertical section export flue and the horizontal segment export flue that communicates each other, vertical section export flue is vertical place and with furnace's exit linkage, horizontal segment export flue level is placed, the flue gas inlet department of horizontal segment export flue divides out two at least way branch pipes, the cross-sectional area of branch pipe is less than the cross-sectional area of horizontal segment export flue, the exit and the flue gas thermoregulation baffle of branch pipe are connected, the flue gas thermoregulation baffle is located in the horizontal segment export flue, every the actuating mechanism is disposed at least to the flue gas thermoregulation baffle, set up the baffle in the furnace export flue, the baffle makes the flue gas that flows through reheater and superheater flow into respectively in the different branch pipes.

The flue gas temperature adjusting baffle is positioned in the horizontal section outlet flue, so that the length of the vertical section outlet flue can be reduced, the height of the boiler is reduced, and the economical efficiency of the boiler is improved.

At least two branch pipes are separated from a flue gas inlet of the horizontal section outlet flue, the cross sectional area of each branch pipe is smaller than that of the horizontal section outlet flue, an outlet of each branch pipe is connected with a flue gas temperature adjusting baffle, the circulation section of flue gas flowing through the reheater and the superheater is reduced through the partition plates, the flow velocity of the flue gas is correspondingly improved under the condition of meeting the standard requirements, and the flue gas temperature adjusting baffle can obtain a better adjusting effect.

Further, the cross-sectional area of the outlet flue of the vertical section is larger than that of the outlet flue of the horizontal section.

The flue gas circulation cross-section that the reheater corresponds with the over heater is dwindled relatively, and the size of flue gas adjusting baffle also diminishes relatively for the quantity of actuating mechanism that needs the control also reduces thereupon, has reduced equipment manufacturing cost.

Furthermore, the cross sections of the vertical section outlet flue and the horizontal section outlet flue are rectangular, and the sum of the cross sections of the plurality of branch pipes is the same as the cross section of the horizontal section outlet flue.

Furthermore, each branch pipe is connected with at least one smoke temperature adjusting baffle, and the smoke temperature adjusting baffles are arranged along the cross section direction of the branch pipe, so that the sum of the cross sections of the smoke temperature adjusting baffles is the same as that of one branch pipe.

Furthermore, two branch pipes are divided from a flue gas inlet of the horizontal section outlet flue, and the two branch pipes are arranged up and down along the width direction of the cross section of the horizontal section outlet flue.

Furthermore, two branch pipes are divided from a flue gas inlet of the horizontal section outlet flue, and the two branch pipes are arranged left and right along the length direction of the cross section of the horizontal section outlet flue.

Has the advantages that:

the utility model provides a pair of improve furnace outlet flue of flue gas temperature adjustment baffle steam temperature regulation effect, divide out two at least way branch pipes with the flue gas import department of horizontal segment outlet flue, and the cross-sectional area of branch pipe is less than the cross-sectional area of horizontal segment outlet flue, the exit and the flue gas temperature adjustment baffle of branch pipe are connected, the circulation cross-section of the flue gas that makes flowing through reheater and over heater through the baffle diminishes, the corresponding flue gas velocity of flow that has improved under the condition that satisfies the standard requirement, make flue gas temperature adjustment baffle can obtain better regulation effect. Meanwhile, the smoke circulation cross section corresponding to the reheater and the superheater is relatively reduced, and the size of the smoke temperature adjusting baffle plate is relatively reduced, so that the number of actuating mechanisms required to be controlled is reduced, and the production cost of equipment is reduced. In addition, the flue gas temperature adjusting baffle is arranged in the horizontal section outlet flue, the length of the vertical section outlet flue can be reduced, the height of the hearth outlet flue is reduced from H1 to H2, the height of the boiler is reduced, and the economical efficiency of the boiler is improved.

The conception, the specific structure and the technical effects produced by the present invention will be further described with reference to the accompanying drawings, so as to fully understand the objects, the features and the effects of the present invention.

Drawings

FIG. 1 is a schematic layout diagram of a conventional tower boiler furnace exit flue structure and internal flue gas temperature regulating baffles thereof;

FIG. 2 is a schematic view of a furnace exit flue for improving the steam temperature adjusting effect of a flue gas temperature adjusting baffle;

reference numerals: 1. a branch pipe; 2. a flue gas temperature regulating baffle; 3. an actuator; 4. an outlet flue of the vertical section; 5. a horizontal section outlet flue; 6. a separator.

Detailed Description

The present invention will be further described with reference to the following detailed description. It should be understood that these examples are for illustrative purposes only and are not intended to limit the scope of the present invention. Furthermore, it should be understood that various changes or modifications can be made by those skilled in the art after reading the teachings of the present invention, and these equivalents also fall within the scope of the appended claims.

In the drawings, structurally identical elements are represented by like reference numerals, and structurally or functionally similar elements are represented by like reference numerals throughout the several views. The size and thickness of each component shown in the drawings are arbitrarily illustrated, and the present invention is not limited to the size and thickness of each component. The thickness of the components may be exaggerated where appropriate in the figures to improve clarity.

As shown in fig. 1, is a schematic layout diagram of a furnace outlet flue structure of a conventional tower boiler and internal flue gas temperature regulation baffles thereof; h1 is the height of a furnace outlet flue of a conventional tower boiler, S1 is the width of a cross section of a flue corresponding to a reheater, and S3 is the width of the cross section of the flue corresponding to a superheater.

The first embodiment is as follows:

in a preferred embodiment, as shown in fig. 2, a furnace exit flue for improving the steam temperature adjusting effect of the flue gas temperature adjusting baffle is provided, wherein H2 is the height of the furnace exit flue of the boiler, S2 is the cross-sectional width of the flue corresponding to the reheater, and S4 is the cross-sectional width of the flue corresponding to the superheater.

The hearth outlet flue comprises a vertical section outlet flue 4 and a horizontal section outlet flue 5 which are communicated with each other, the cross sections of the vertical section outlet flue 4 and the horizontal section outlet flue 5 are rectangular, and the cross section area of the vertical section outlet flue 4 is larger than that of the horizontal section outlet flue 5. The vertical section outlet flue 4 is vertically arranged and connected with an outlet of the hearth, the reheater and the superheater are located in the hearth, the horizontal section outlet flue 5 is horizontally arranged, a flue gas inlet of the horizontal section outlet flue 5 is divided into two branch pipes 1, and the two branch pipes 1 are vertically arranged along the width direction of the cross section of the horizontal section outlet flue 5. The sum of the cross-sectional areas of the two branch pipes 1 is the same as the cross-sectional area of the horizontal section outlet flue 5. The cross-sectional area of the branch pipe 1 is smaller than that of the horizontal section outlet flue 5, the outlet of each branch pipe 1 is connected with a flue gas temperature adjusting baffle 2, each flue gas temperature adjusting baffle 2 is provided with two actuating mechanisms 3, the flue gas temperature adjusting baffle 2 is positioned in the horizontal section outlet flue 5, a partition plate 6 is arranged in the hearth outlet flue, and the partition plate 6 enables flue gas flowing through a reheater and a superheater to respectively flow into the two branch pipes 1, specifically, the partition plate 6 enables the flue gas flowing through the reheater to flow into the branch pipe 1 with the flue cross-sectional width of S2, and the flue gas flowing through the superheater to flow into the branch pipe 1 with the flue cross-sectional width of S4.

Two branch pipes 1 are separated from a flue gas inlet of a horizontal section outlet flue 5, the cross section area of each branch pipe 1 is smaller than that of the horizontal section outlet flue 5, an outlet of each branch pipe 1 is connected with a flue gas temperature adjusting baffle 2, the circulation cross section of flue gas flowing through a reheater and a superheater is reduced through a partition plate 6, the flow rate of the flue gas is correspondingly improved under the condition of meeting the standard requirement, and the flue gas temperature adjusting baffle 2 can obtain a better adjusting effect. Meanwhile, under the condition that the lengths of the sections of the flues are the same, the width of the section of the flue is reduced from S1+ S3 (about 20 meters) to S2+ S4 (about 6 meters), the size of the flue gas temperature adjusting baffle 2 is correspondingly reduced, the number of required actuating mechanisms 3 is also reduced from 12 to 4, and the production cost of equipment is reduced. In addition, the flue gas temperature adjusting baffle is arranged in the horizontal section outlet flue 5, the length of the vertical section outlet flue 4 can be reduced, the height of the hearth outlet flue is reduced from H1 to H2, the height of the boiler is reduced, and the economical efficiency of the boiler is improved.

Example 2:

the embodiment is basically the same as the embodiment 1, except that two branch pipes 1 are branched at the flue gas inlet of the horizontal section outlet flue 5, and the two branch pipes 1 are arranged left and right along the length direction of the cross section of the horizontal section outlet flue 5.

It should be noted that, the flue gas inlet of the horizontal section outlet flue 5 may also be divided into six, eight, or ten branch pipes 1, and the branch pipes 1 may be arranged along the length and width direction of the cross section of the horizontal section outlet flue 5 according to the structural size of the furnace outlet flue.

Claims

1. The utility model provides an improve furnace outlet flue of flue gas thermoregulation baffle steam temperature regulation effect, its characterized in that, furnace outlet flue includes vertical section outlet flue (4) and horizontal segment outlet flue (5) that communicate each other, vertical section outlet flue (4) are vertical place and with furnace's exit linkage, horizontal segment outlet flue (5) level is placed, at least two way branch pipes (1) are divided to the flue gas import department of horizontal segment outlet flue (5), the cross-sectional area of branch pipe (1) is less than the cross-sectional area of horizontal segment outlet flue (5), the exit and the flue gas thermoregulation baffle (2) of branch pipe (1) are connected, flue gas thermoregulation baffle (2) are located in horizontal segment outlet flue (5), every flue gas thermoregulation baffle (2) dispose an actuating mechanism (3) at least, set up flue baffle (6) in the furnace outlet, baffle (6) make the flue gas that flows through reheater and over heater flow into respectively in different branch pipes (1).

2. The furnace outlet flue for improving the steam temperature adjusting effect of the flue gas temperature adjusting baffle according to claim 1, wherein the cross-sectional area of the vertical section outlet flue (4) is larger than that of the horizontal section outlet flue (5).

3. The hearth outlet flue for improving the steam temperature adjusting effect of the flue gas temperature adjusting baffle according to claim 1, wherein the vertical section outlet flue (4) and the horizontal section outlet flue (5) are rectangular in cross section, and the sum of the cross sectional areas of the plurality of branch pipes (1) is the same as the cross sectional area of the horizontal section outlet flue (5).

4. The hearth outlet flue for improving the steam temperature adjusting effect of the flue gas temperature adjusting baffles according to claim 3, wherein each branch pipe (1) is connected with at least one flue gas temperature adjusting baffle (2), and the flue gas temperature adjusting baffles (2) are arranged along the cross section direction of the branch pipe (1), so that the sum of the cross section areas of the flue gas temperature adjusting baffles (2) is the same as the cross section area of one branch pipe (1).

5. The hearth outlet flue for improving the steam temperature adjusting effect of the flue gas temperature adjusting baffle according to claim 3, wherein the flue gas inlet of the horizontal section outlet flue (5) is divided into two branch pipes (1), and the two branch pipes (1) are arranged up and down along the width direction of the cross section of the horizontal section outlet flue (5).

6. The hearth outlet flue for improving the steam temperature adjusting effect of the flue gas temperature adjusting baffle according to claim 3, wherein the flue gas inlet of the horizontal section outlet flue (5) is divided into two branch pipes (1), and the two branch pipes (1) are arranged left and right along the length direction of the cross section of the horizontal section outlet flue (5).