CN210014348U

CN210014348U - Special pressure relief door of gravity type boiler furnace

Info

Publication number: CN210014348U
Application number: CN201920904633.3U
Authority: CN
Inventors: 寇鹏
Original assignee: Laicheng Power Plant Huadian International Power Co Ltd
Current assignee: Laicheng Power Plant Huadian International Power Co Ltd
Priority date: 2019-06-17
Filing date: 2019-06-17
Publication date: 2020-02-04
Anticipated expiration: 2029-06-17

Abstract

The utility model relates to a special pressure relief door for a gravity type boiler furnace, which comprises a pressure relief door main body communicated with the furnace wall of the furnace, wherein an outer pressure relief flue is communicated above the pressure relief door main body, an inner pressure relief channel is communicated below the pressure relief door main body, and the lower end of the inner pressure relief channel is open; an upper sealing cover is covered at a smoke outlet at the top end of the leakage flue, the upper sealing cover is fixedly connected with an upper connecting rod extending into the leakage flue, an upper guide pipe is arranged in the leakage flue, the upper connecting rod penetrates into the upper guide pipe, and the lower end of the upper connecting rod is connected with an upper heavy block through a traction rope; the joint of the inner air release passage and the pressure release door main body is covered with a lower sealing cover, the lower sealing cover is fixedly connected with a lower connecting rod extending into the inner air release passage, a lower guide pipe is arranged in the inner air release passage, the lower connecting rod penetrates into the lower guide pipe, and the lower end of the lower connecting rod is connected with a lower heavy block through a traction rope. When the internal pressure of the hearth is too high, the pressure is released outwards, and when the internal pressure of the hearth is too low, the pressure is released inwards, so that the pressure of the hearth is always in a safe range.

Description

Special pressure relief door of gravity type boiler furnace

Technical Field

The utility model relates to a power generation facility technical field especially relates to a special pressure relief door of gravity type boiler furnace.

Background

In a thermal power plant, fuel is combusted inside a boiler furnace to generate high-temperature flue gas, so that the internal pressure of the furnace is formed. The pressure inside the hearth is kept stable, and the safety of the boiler is very important.

If the combustion is unstable or the control is unstable, the amount of the generated smoke can be changed greatly, and two effects can be caused: firstly, the pressure in the hearth is suddenly overhigh, the wall of the hearth is pressed to be convex outwards, and even is pressed to be exploded; and secondly, the internal pressure of the hearth is suddenly too low, and the wall of the hearth is inwards dented or even collapsed by the external atmospheric pressure. Both of the two conditions can cause boiler damage and unit shutdown, and seriously threatens the safe operation of a thermal power plant.

This patent designs a special pressure release door of boiler furnace, outside pressure release when furnace internal pressure is too high, inside pressure release when furnace internal pressure crosses lowly for furnace pressure is at safety range all the time.

SUMMERY OF THE UTILITY MODEL

The utility model discloses to prior art's not enough, provide a special pressure release door of gravity type boiler furnace, outside pressure release when furnace internal pressure is too high, inside pressure release when furnace internal pressure is low excessively for furnace pressure is at safety range all the time.

The utility model is realized by the following technical proposal, provides a special pressure relief door for a gravity type boiler furnace, which comprises a pressure relief door main body communicated with the furnace wall of the furnace, an outer gas leakage flue communicated above the pressure relief door main body, an inner gas leakage channel communicated below the pressure relief door main body, and the lower end of the inner gas leakage channel is open; an upper sealing cover is covered at a smoke outlet at the top end of the leakage flue, the upper sealing cover is fixedly connected with an upper connecting rod extending into the leakage flue, an upper guide pipe is arranged in the leakage flue, the upper connecting rod penetrates into the upper guide pipe, and the lower end of the upper connecting rod is connected with an upper heavy block through a traction rope; the joint of the inner air release passage and the pressure release door main body is covered with a lower sealing cover, the lower sealing cover is fixedly connected with a lower connecting rod extending into the inner air release passage, a lower guide pipe is arranged in the inner air release passage, the lower connecting rod penetrates into the lower guide pipe, and the lower end of the lower connecting rod is connected with a lower heavy block through a traction rope.

Preferably, the upper guide pipe is connected with the inner wall of the leakage flue through an upper support rod, one end of the upper support rod is fixedly connected with the upper guide pipe, and the other end of the upper support rod is fixedly connected with the inner wall of the leakage flue.

Preferably, a sealing ring is arranged at the smoke outlet at the top end of the external leakage flue, and the upper sealing cover is buckled on the upper sealing ring.

Preferably, the lower guide pipe is connected with the inner wall of the inner air leakage passage through a lower support rod, one end of the lower support rod is fixedly connected with the lower guide pipe, and the other end of the lower support rod is fixedly connected with the inner wall of the inner air leakage passage.

Preferably, a lower sealing ring is arranged at the joint of the inner air leakage passage and the pressure relief door main body, and the lower sealing cover is buckled on the lower sealing ring.

Preferably, the pressure relief door body is connected to the furnace chamber wall by a flange.

The utility model has the advantages that:

1. when the internal pressure of the hearth is too high, the pressure is released outwards, and when the internal pressure of the hearth is too low, the pressure is released inwards, so that the pressure of the hearth is always in a safe range.

2. When the pressure relief door is used, the weights with different weights can be used according to the requirement of the pressure safety value of a specific hearth, and the flexibility is high.

3. The outer air leakage flue and the inner air leakage channel are distributed up and down, so that the high-temperature radiation of high-temperature combustion flame of the hearth is kept away, the temperature of each part is reduced, and high-temperature burnout is avoided.

Drawings

FIG. 1 is a schematic front view of the present invention;

shown in the figure:

1. the pressure relief door comprises a pressure relief door body, 2, flanges, 3, an outer gas leakage flue, 4, an upper weight, 5, an upper supporting rod, 6, an upper guide pipe, 7, an upper connecting rod, 8, an upper sealing cover, 9, an upper sealing ring, 10, a lower sealing cover, 11, a lower connecting rod, 12, a lower sealing ring, 13, a lower supporting rod, 14, a lower guide pipe, 15, an inner gas leakage flue, 16 and a lower weight.

Detailed Description

In order to clearly illustrate the technical features of the present solution, the present solution is explained below by way of specific embodiments.

As shown in figure 1, the utility model discloses a with the pressure release door main part 1 of furnace thorax wall intercommunication, the flue 3 leaks in the top intercommunication of pressure release door main part 1, loses heart in the below intercommunication of pressure release door main part 1 and says 15, and the lower extreme that says 15 loses heart in is open. An upper sealing cover 8 is covered at a smoke outlet at the top end of the external leakage flue 3, the upper sealing cover 8 is fixedly connected with an upper connecting rod 7 extending into the external leakage flue 3, an upper guide pipe 6 is arranged in the external leakage flue 3, the upper connecting rod 7 penetrates into the upper guide pipe 6, and the lower end of the upper connecting rod 7 is connected with an upper heavy block 4 through a traction rope. The joint of the inner air discharge passage 15 and the pressure discharge door main body 1 is covered with a lower sealing cover 10, the lower sealing cover 10 is fixedly connected with a lower connecting rod 11 extending into the inner air discharge passage 15, a lower guide pipe 14 is arranged in the inner air discharge passage 15, the lower connecting rod 11 penetrates into the lower guide pipe 14, and the lower end of the lower connecting rod 11 is connected with a lower weight 16 through a traction rope.

In this embodiment, the upper guide pipe 6 is connected to the inner wall of the exhaust flue 3 through an upper support rod 5, one end of the upper support rod 5 is fixedly connected to the upper guide pipe 6, and the other end is fixedly connected to the inner wall of the exhaust flue 3.

In this embodiment, in order to increase the sealing effect of the upper sealing cover 8, an upper sealing ring 9 is installed at the smoke outlet at the top end of the external smoke duct 3, and the upper sealing cover 8 is buckled on the upper sealing ring 9.

In this embodiment, the lower guide tube 14 is connected to the inner wall of the inner venting channel 15 through the lower support rod 13, one end of the lower support rod 13 is fixedly connected to the lower guide tube 14, and the other end is fixedly connected to the inner wall of the inner venting channel 15.

In this embodiment, in order to increase the sealing effect of the lower sealing cover 10, a lower sealing ring 12 is installed at the connection of the inner vent path 15 and the pressure relief door main body 1, and the lower sealing cover 10 is fastened on the lower sealing ring 12.

In the present embodiment, the pressure relief door body 1 is connected to the furnace chamber wall by means of a flange 2.

The pressure release principle of this application is as follows: when the smoke pressure of the hearth is too high and is greater than the sum of the gravity of the upper sealing cover 8, the upper connecting rod 7 and the upper heavy block 4, the upper sealing cover 8 is pushed open by the smoke pressure, and smoke is rapidly discharged into the atmosphere, so that the smoke volume in the hearth is reduced, and the pressure is reduced. When the smoke pressure of the hearth is reduced to be less than the sum of the gravity of the upper sealing cover 8, the upper connecting rod 7 and the upper heavy block 4, the upper sealing cover 8 falls down. Thus, the leakage protection action of the pressure relief door is completed.

When the smoke pressure of the hearth is too low and the external atmospheric pressure is greater than the sum of the gravity of the lower sealing cover 10, the lower connecting rod 11 and the lower weight 16, the external atmospheric pressure pushes the lower sealing cover 10 open, the external atmosphere is rapidly discharged into the hearth, so that the smoke volume (smoke and air) in the hearth is increased, and the pressure is increased; when the sum of the gravity of the lower sealing cover 10, the lower connecting rod 11 and the lower heavy block 16 and the pressure of the hearth smoke pressure on the lower sealing cover 10 are higher than the external atmospheric pressure along with the pressure increase, the lower sealing cover 10 falls down. Thus, the inner leakage protection action of the pressure relief door is completed.

Of course, the above description is not limited to the above examples, and technical features of the present invention that are not described in the present application may be implemented by or using the prior art, and are not described herein again; the above embodiments and drawings are only used for illustrating the technical solutions of the present invention and are not intended to limit the present invention, and the present invention has been described in detail with reference to the preferred embodiments, and those skilled in the art should understand that changes, modifications, additions or substitutions made by those skilled in the art within the spirit of the present invention should also belong to the protection scope of the claims of the present invention.

Claims

1. The utility model provides a special pressure relief door of gravity type boiler furnace which characterized in that: the hearth furnace pressure relief door comprises a pressure relief door main body (1) communicated with the hearth wall of a hearth, an outer pressure relief flue (3) is communicated above the pressure relief door main body (1), an inner pressure relief air channel (15) is communicated below the pressure relief door main body (1), and the lower end of the inner pressure relief air channel (15) is opened; an upper sealing cover (8) is covered at a smoke outlet at the top end of the outer leakage flue (3), the upper sealing cover (8) is fixedly connected with an upper connecting rod (7) extending into the outer leakage flue (3), an upper guide pipe (6) is arranged in the outer leakage flue (3), the upper connecting rod (7) penetrates into the upper guide pipe (6), and the lower end of the upper connecting rod (7) is connected with an upper heavy block (4) through a traction rope; the joint of the internal air leakage passage (15) and the pressure relief door main body (1) is covered with a lower sealing cover (10), the lower sealing cover (10) is fixedly connected with a lower connecting rod (11) extending into the internal air leakage passage (15), a lower guide pipe (14) is arranged in the internal air leakage passage (15), the lower connecting rod (11) penetrates into the lower guide pipe (14), and the lower end of the lower connecting rod (11) is connected with a lower weight (16) through a traction rope.

2. The pressure relief door special for the gravity type boiler furnace according to claim 1, characterized in that: the upper guide pipe (6) is connected with the inner wall of the outer exhaust flue (3) through an upper support rod (5), one end of the upper support rod (5) is fixedly connected with the upper guide pipe (6), and the other end of the upper support rod is fixedly connected with the inner wall of the outer exhaust flue (3).

3. The pressure relief door special for the gravity type boiler furnace according to claim 2, characterized in that: an upper sealing ring (9) is arranged at a smoke outlet at the top end of the leakage flue (3), and an upper sealing cover (8) is buckled on the upper sealing ring (9).

4. The pressure relief door special for the gravity type boiler furnace according to claim 1, characterized in that: the lower guide pipe (14) is connected with the inner wall of the inner air discharge passage (15) through a lower support rod (13), one end of the lower support rod (13) is fixedly connected with the lower guide pipe (14), and the other end of the lower support rod is fixedly connected with the inner wall of the inner air discharge passage (15).

5. The pressure relief door special for the gravity type boiler furnace according to claim 4, characterized in that: a lower sealing ring (12) is arranged at the joint of the inner air leakage passage (15) and the pressure relief door main body (1), and the lower sealing cover (10) is buckled on the lower sealing ring (12).

6. The pressure relief door special for the gravity type boiler furnace according to claim 1, characterized in that: the pressure relief door main body (1) is connected with the hearth wall of the hearth through a flange (2).