CN219318479U

CN219318479U - Coal-fired boiler air heater with branch control

Info

Publication number: CN219318479U
Application number: CN202223219228.9U
Authority: CN
Inventors: 陈金凤; 徐建刚; 任联翔; 王亚萍
Original assignee: Huaneng Zhejiang Energy Development Co Ltd Changxing Branch
Current assignee: Huaneng Zhejiang Energy Development Co Ltd Changxing Branch
Priority date: 2022-12-02
Filing date: 2022-12-02
Publication date: 2023-07-07
Anticipated expiration: 2032-12-02

Abstract

The utility model discloses a coal-fired boiler air heater with branch control, which comprises a main path pipe, wherein a branch pipe is arranged on the circumferential surface of the upper part of the main path pipe, the bottom end of the branch pipe extends to the circumferential surface of the lower part of the main path pipe, control parts are arranged at the joints of the main path pipe and the branch pipe, a connecting through groove which is communicated left and right is arranged on the surface of the main path pipe and the surface of the branch pipe between the joints of the main path pipe and the branch pipe, and a warm air sleeving mechanism is arranged in the connecting through groove. The utility model has a series of structures, so that the coal-fired boiler air heater with branch control can be different from the existing air heater, has branch control, can be convenient to overhaul, has a larger heating area, is convenient to preheat cold air, and meets industrial requirements.

Description

Coal-fired boiler air heater with branch control

Technical Field

The utility model relates to the technical field of boiler air heaters, in particular to a coal-fired boiler air heater with branch control.

Background

The sulfur component exists in the coal-fired boiler, and when the boiler encounters water vapor at low temperature, the metal corrosion of the heating surface at the tail part of the boiler can be caused, so that the existing technical scheme capable of solving the problems comprises a heater technology, a hot air recycling technology, a heat pipe and other technologies. The air heater preheats air through steam in the steam turbine, so that low-temperature corrosion can be effectively avoided. The traditional air heater has a coil pipe structure, and new sleeve pipes are put into use in recent years.

The U-shaped elbow of the coil pipe type air heater is easy to leak due to long-term flushing of steam with different temperatures and the like, so that the running cost of the unit is increased; the sleeve type air heater solves the problems, but has the problems of reduced heat exchange efficiency and the like caused by a circular section.

Meanwhile, the problems existing in the two schemes are as follows: the outer tube affects the gas flow rate to be too large, so that the service life is reduced; without an alternative scheme, the power generation unit needs to be shut down for maintenance during replacement, and the shutdown operation of the power generation unit can greatly increase the operation cost and is unfavorable for the production operation of a power plant.

Disclosure of Invention

The utility model aims to provide a coal-fired boiler air heater with branch control, which aims to solve the problems in the background technology.

In order to achieve the above purpose, the present utility model provides the following technical solutions: the utility model provides a take coal-fired boiler air heater of branch road control, includes main road pipe, the circumference surface mounting of main road pipe upper portion has the branch road pipe, and the bottom of branch road pipe extends to the circumference surface of main road pipe lower part, control unit is all installed to the junction of main road pipe and branch road pipe, main road pipe surface and the branch road pipe surface between main road pipe and branch road pipe junction all are provided with the accepting logical groove of controlling mutual switching on, accept the internally mounted of logical groove and have warm braw to cup joint the mechanism.

Preferably, the control component is a three-way valve, and the three-way valve is respectively arranged at the joint of the main pipeline and the branch pipeline.

Preferably, the inner wall of the receiving through groove is of a triangular structure, the warm air sleeving mechanism comprises a steam pipe and a triangular section sleeve, the triangular section sleeve is installed on the main road pipe in a left-right penetrating mode through the receiving through groove, the triangular section sleeve is distributed in a triangular mode, the tip end of the triangular section sleeve faces to the air inlet of the main road pipe, and the steam pipe is installed inside the triangular section sleeve.

Preferably, the steam pipe is obliquely arranged, and the bottom of the steam pipe is provided with a condensation pipe fitting.

Preferably, a sealing element is arranged between the triangular section sleeve and the receiving through groove.

Preferably, the storage device is detachably arranged in the receiving through groove of the branch pipe.

Preferably, a step clamping groove is formed in the surface of the branch pipe outside the receiving through groove, and a sealing ring is arranged between the sealing device and the step clamping groove.

Compared with the prior art, the utility model has the beneficial effects that:

1. this take coal-fired boiler air heater of branch road control, through the main way pipe, with the form that branch road pipe used in combination, when can regard main way pipe as the common coal-fired boiler air heating passageway to use, when needing to carry out main way pipe maintenance etc. operations, can carry cold wind with the help of the branch road pipe to carry out the warm braw operation, can intervene in the maintenance in-process temporarily, avoid the problem of unit shut down and stop production, and then the cost that leads to rises.

2. This take coal-fired boiler air heater of branch road control is through holding the switch-on groove to use with triangle cross-section sleeve pipe combination, can form the passageway of triangle cross-section, the pointed end upwards can avoid causing great resistance when contacting with decurrent wind-force, prevent that wind-force from damaging too big influence follow-up transportation, and under the circumstances that switches on about the triangle cross-section sleeve pipe, can do benefit to the installation steam pipe, the steam heat transmission to the surface that releases the steam pipe, be convenient for heat cold wind, heat conduction area is great, and then the thermal conversion rate is higher.

3. This take coal-fired boiler warm braw ware of branch road control, through lay the steam pipe slant, can form a slope, at the in-process such as steam chilled condensation, the comdenstion water can be carried along the slope to with the help of the condensation pipe fitting, its upper opening is the bucket-shaped structure, can be convenient for collect the water, carries out unified output.

4. This take coal-fired boiler air heater of branch road control, through the ladder draw-in groove, can retrain spacingly to the sealing washer, when being convenient for install, can combine the use with the stopper, the stopper is protruding structure, can be under the condition of not using the branch road pipe, seals the accepting through groove on the branch road pipe, avoids because of long-term not using or exposing in the external environment, causes the problem emergence such as triangle cross-section sleeve pipe on the low branch road pipe.

Drawings

FIG. 1 is a schematic overall structure of embodiment 1;

FIG. 2 is a schematic cross-sectional view of the triangular-section sleeve of FIG. 1;

fig. 3 is a schematic view of a part of the internal structure of the bypass pipe of embodiment 2.

In the figure: 1. a main pipe; 2. a steam pipe; 3. a triangular section sleeve; 4. a seal; 5. a three-way valve member; 6. a branch pipe; 7. a seal memory; 8. condensing pipe fittings; 9. a bearing slot; 10. a seal ring; 11. a step clamping groove.

Detailed Description

The following description of the embodiments of the present utility model will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present utility model, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.

In the description of the present utility model, it should be noted that the directions or positional relationships indicated by the terms "upper", "lower", "inner", "outer", "front", "rear", "both ends", "one end", "the other end", etc. are based on the directions or positional relationships shown in the drawings, are merely for convenience of describing the present utility model and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a specific direction, be configured and operated in the specific direction, and thus should not be construed as limiting the present utility model. Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

In the description of the present utility model, it should be noted that, unless explicitly specified and limited otherwise, the terms "mounted," "provided," "connected," and the like are to be construed broadly, and may be fixedly connected, detachably connected, or integrally connected, for example; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present utility model will be understood in specific cases by those of ordinary skill in the art.

Example 1

As shown in fig. 1 and 2, the coal-fired boiler air heater with branch control in this embodiment includes a main duct 1, the main duct 1 is used as a duct for supplying air to the coal-fired boiler, when in use, the required cool air is required to be supplied from top to bottom, the branch duct 6 is installed on the circumferential surface of the upper portion of the main duct 1, the bottom end of the branch duct 6 extends to the circumferential surface of the lower portion of the main duct 1, the branch duct 6 is used as a side loop, two ends of the branch duct 6 are respectively and fixedly connected with the main duct 1 in different directions, the main duct 1 can be used as a common coal-fired boiler air heating channel, when the main duct 1 needs to be overhauled, cool air can be supplied by means of the branch duct 6, and warm air operation can be temporarily inserted in the overhauling process, the problem of stopping production of a unit is avoided, further, the cost is increased, the control parts are installed at the connection positions of the main duct 1 and the branch duct 6, the control parts are actually switch parts in front of the main duct 1 and the branch duct 6, the two ends of the branch duct 6 are fixedly connected with the main duct 1, the main duct 1 and the branch duct 6, at the connection positions are respectively, the left side surface 1 and the main duct 6 and the left side surface 1 and the branch duct 6 are in the air receiving channel are in a sleeve connection structure, and the air receiving channel 9 is connected with the air heating channel, and the air heater is in a sleeve structure, and the air heating channel is connected with the air heating channel, and the air heater is arranged, and the air heater is in the air receiving channel, and has.

Specifically, the control part is a three-way valve element 5, the three-way valve element 5 is respectively arranged at the joint of the main pipeline 1 and the branch pipeline 6, the three-way valve element 5 has a three-way conduction function, and the three-way valve element can be used as a conduction control valve element between the branch pipeline 6 and the branch pipeline 6 in actual use, when the main pipeline 1 needs to be overhauled, the branch pipeline 6 can be opened by means of the three-way valve element 5, so that cold air bypasses the heating and ventilation sleeving mechanism in the main pipeline 1, and the cold air is heated by the heating and ventilation sleeving mechanism of the branch pipeline 6.

Further, accept the position that the through groove 9 inner wall is triangle-shaped structure, and tip up is facing to main road pipe 1 air intake, and warm braw cup joint the mechanism and include steam pipe 2 and triangle cross-section sleeve pipe 3, triangle cross-section sleeve pipe 3 link up about through accepting through groove 9 and install on main road pipe 1, triangle cross-section sleeve pipe 3 is triangle-shaped and laid, and the tip of triangle cross-section sleeve pipe 3 is towards main road pipe 1 air intake, reducible windage, triangle cross-section sleeve pipe 3 is inside main road pipe 1, and make triangle cross-section sleeve pipe 3 and the passageway that whole main road pipe 1 circulated from top to bottom have the clearance, steam pipe 2 installs inside triangle cross-section sleeve pipe 3, steam pipe 2 actual both ends are located the both sides of triangle cross-section sleeve pipe 3, when being used for carrying steam to triangle cross-section sleeve pipe 3, steam after the use is discharged from steam pipe 2, the steam releasable great heat heats triangle cross-section sleeve pipe 3, make triangle cross-section sleeve pipe 3's surface area temperature is higher, can heat the cold wind.

Further, the steam pipe 2 is obliquely arranged, namely, a conveying gradient is formed, so that condensed water is conveniently guided to circulate, the bottom of the steam pipe 2 is provided with the condensation pipe 8, the condensation pipe 8 can be connected with the lowest position inside the steam pipe 2, the condensed water can be conveniently received, the whole triangular section sleeve 3 can be obliquely arranged, the condensation pipe 8 is installed at the lowest position of the triangular section sleeve 3, and condensed water formed in the triangular section sleeve 3 can be received.

Furthermore, a sealing element 4 is installed between the triangular section sleeve 3 and the receiving through groove 9, the sealing element 4 is in the form of a sealing ferrule, can be sealed by means of a rubber ring and the like, and is provided with a connecting piece such as a bolt and the like, so that the sealing effect of the receiving through groove 9 is ensured.

Example 2

The structure of the coal-fired boiler air heater with the branch control in this embodiment is basically the same as that of the coal-fired boiler air heater with the branch control in embodiment 1, and the difference is that: the seal device 7 (see fig. 3) is detachably mounted in the receiving through groove 9 of the branch pipe 6 through a bolt screw hole, and under the conditions that the maintenance is not frequent, and the branch pipe 6 is not frequently used, in order to avoid that the triangular section sleeve 3 on the branch pipe 6 is corroded by the environment or is temporarily not mounted in a matched manner, the seal device 7 can seal the receiving through groove 9, and the seal device 7 has a triangular ladder structure.

Specifically, the surface of the branch pipe 6 outside the carrying through groove 9 is provided with a step clamping groove 11, the step clamping groove 11 can be matched with the step structure of the sealing device 7 to form a limiting effect, a sealing ring 10 is arranged between the sealing device 7 and the step clamping groove 11, the sealing ring 10 is a heat-resistant rubber sealing ring, and when the sealing device is actually mounted by means of bolts, the step part of the sealing device 7 is clamped into the step clamping groove 11 and is limited and tightly pressed against the sealing ring 10 to form a sealing effect.

Finally, it should be noted that: the foregoing description is only a preferred embodiment of the present utility model, and the present utility model is not limited thereto, but it is to be understood that modifications and equivalents of some of the technical features described in the foregoing embodiments may be made by those skilled in the art, although the present utility model has been described in detail with reference to the foregoing embodiments. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present utility model should be included in the protection scope of the present utility model.

Claims

1. The utility model provides a take coal-fired boiler warm braw ware of branch road control, includes main road pipe (1), its characterized in that: the circumferential surface of the upper part of the main pipeline (1) is provided with a branch pipeline (6), the bottom end of the branch pipeline (6) extends to the circumferential surface of the lower part of the main pipeline (1), the joint of the main pipeline (1) and the branch pipeline (6) is provided with a control part, the hot air sleeve connecting device is characterized in that a connecting groove (9) which is communicated left and right is formed in the surface of the main pipeline (1) and the surface of the branch pipeline (6) between the connecting parts of the main pipeline (1) and the branch pipeline (6), and a hot air sleeve connecting mechanism is arranged in the connecting groove (9).

2. The coal-fired boiler heater with branch control according to claim 1, wherein: the control component is a three-way valve (5), and the three-way valve (5) is respectively arranged at the joint of the main pipeline (1) and the branch pipeline (6).

3. The coal-fired boiler heater with branch control according to claim 1, wherein: the inner wall of the bearing through groove (9) is of a triangular structure, the warm air sleeving mechanism comprises a steam pipe (2) and a triangular section sleeve (3), the triangular section sleeve (3) is installed on the main road pipe (1) in a left-right penetrating mode through the bearing through groove (9), the triangular section sleeve (3) is arranged in a triangular mode, the tip end of the triangular section sleeve (3) faces the air inlet of the main road pipe (1), and the steam pipe (2) is installed inside the triangular section sleeve (3).

4. A coal-fired boiler heater with branch control according to claim 3, wherein: the steam pipe (2) is obliquely arranged, and a condensation pipe fitting (8) is installed at the bottom of the steam pipe (2).

5. A coal-fired boiler heater with branch control according to claim 3, wherein: a sealing piece (4) is arranged between the triangular section sleeve (3) and the bearing groove (9).

6. The coal-fired boiler heater with branch control according to claim 1, wherein: a sealing device (7) is detachably arranged in the receiving through groove (9) of the branch pipe (6).

7. The coal-fired boiler heater with branch control according to claim 6, wherein: the surface of the branch pipe (6) outside the bearing through groove (9) is provided with a step clamping groove (11), and a sealing ring (10) is arranged between the sealing device (7) and the step clamping groove (11).