CN212869813U

CN212869813U - Boiler soot blowing system

Info

Publication number: CN212869813U
Application number: CN202020645704.5U
Authority: CN
Inventors: 商执晋; 刘进峰; 施以文; 刘青松; 陈捷; 刘畅; 施泰强
Original assignee: Jiangsu Datang International Lvsigang Power Generation Co ltd
Current assignee: Jiangsu Datang International Lvsigang Power Generation Co ltd; Jiangsu Datang International Lusigang Power Generation Co Ltd
Priority date: 2020-04-24
Filing date: 2020-04-24
Publication date: 2021-04-02
Anticipated expiration: 2030-04-24

Abstract

The utility model belongs to heat energy power engineering discloses a boiler soot blowing system, include with the main vapour source pipe that blows the vapour source pipe intercommunication, be equipped with branch vapour source pipe on the main vapour source pipe, be equipped with electronic isolating valve on the branch vapour source pipe, the extension end of branch vapour source pipe is equipped with the soot blower that is used for in time blowing the ash. The utility model discloses in, when a certain type of soot blower is put into operation, can keep apart other soot blowers, avoid other soot blower poppet valves to be in cold, hot in turn all the time, improve the life of soot blower poppet valve, practice thrift the use amount that blows grey steam.

Description

Boiler soot blowing system

Technical Field

The utility model belongs to heat energy power engineering, concretely relates to boiler soot blowing system.

Background

In the existing soot blowing system, 76 wall soot blowers are arranged in a boiler hearth, 46 long telescopic soot blowers are arranged in an upper hearth screen area and a horizontal flue, and 6 semi-telescopic soot blowers are arranged in a tail shaft flue. All the water-cooled wall soot blowers and the steam sources of the long telescopic soot blowers are extracted from outlet steam source pipes of the partition screen superheaters, and a steam pressure reduction station is shared. And (4) after the steam is decompressed, sending the steam to a soot blower, wherein the soot blower is controlled by a program. Manual isolation valves are respectively arranged on a long telescopic soot blower steam source main pipe, an air preheater soot blower steam source main pipe and a hearth soot blower steam source main pipe, and the manual valves are all in an open state during normal soot blowing. Therefore, the inlet of the lift valve of each sootblower is filled with high temperature and high pressure steam no matter which sootblower is operating. During the process of starting and stopping the soot blower, cooling and warming pipes are respectively carried out, the temperature of a valve clack of a lift valve is greatly changed for a long time, the valve clack is subjected to alternating stress, the service life is rapidly reduced, once impurities appear in steam, the sealing surface of the valve clack is washed, the lift valve quickly leaks inwards, after the inner leakage of the soot blower lift valve, a soot blower barrel and a heated surface pipe are continuously blown to be damaged, the soot blower barrel is thinned, and the soot blower is easy to break in the soot blowing process; continuously blowing the heated surface pipe to damage, thinning the heated surface pipe until the boiler explodes the pipe; after the use frequency of the soot blower is improved, the use amount of a soot blowing steam source is greatly increased, and the energy-saving effect cannot be realized by sharing one control station.

SUMMERY OF THE UTILITY MODEL

The utility model aims to provide a: when a certain soot blower is put into operation, other soot blowers can be isolated, other soot blower lift valves are prevented from being in cold and hot alternation all the time, the service life of the soot blower lift valves is prolonged, and the usage amount of soot blowing steam is saved.

The utility model adopts the technical scheme as follows:

a boiler soot-blowing system comprises a main steam source pipe communicated with a soot-blowing steam source pipe, wherein a branch steam source pipe is arranged on the main steam source pipe, an electric isolating valve is arranged on the branch steam source pipe, and a soot blower for timely blowing soot is arranged at the extending end of the branch steam source pipe.

Furthermore, the branch steam source pipe comprises a first steam source pipe, a second steam source pipe, a third steam source pipe and a fourth steam source pipe, the electric isolation valve comprises a first electric isolation valve, a second electric isolation valve, a third electric isolation valve and a fourth electric isolation valve, and the first steam source pipe, the second steam source pipe, the third steam source pipe and the fourth steam source pipe are respectively provided with the first electric isolation valve, the second electric isolation valve, the third electric isolation valve and the fourth electric isolation valve.

Furthermore, the extending ends of the first steam source pipe, the second steam source pipe, the third steam source pipe and the fourth steam source pipe are respectively communicated with a first flue soot blower, a first hearth soot blower, a second flue soot blower and a second air preheater soot blower.

Furthermore, an auxiliary steam source is communicated with the fourth steam source pipe through the fifth steam source pipe.

Furthermore, the soot blowing steam source pipe comprises a first soot blowing steam source pipe and a second soot blowing steam source pipe which are used as main steam source pipes for transmitting steam sources.

To sum up, owing to adopted above-mentioned technical scheme, the beneficial effects of the utility model are that:

1. the utility model discloses in, be equipped with electronic isolation valve one, electronic isolation valve two, electronic isolation valve three, electronic isolation valve four on steam source pipe one, steam source pipe two, steam source pipe three, steam source pipe four respectively, but the soot blower of every kind of convenient to use person independent control avoids other soot blower poppet valves to be in cold, hot in turn all the time, improves the life of soot blower poppet valve, practices thrift the use amount that blows grey steam.

2. The utility model discloses in, blow the ash steam source pipe one, blow and be equipped with relief valve one, relief valve two on the ash steam source pipe two respectively, can guarantee that the system does not take place the accident because of the pressure is too high.

Drawings

Fig. 1 is a schematic diagram of the system of the present invention.

The labels in the figure are: 1 soot blowing steam source pipe, 11 soot blowing steam source pipe I, 111 safety valve I, 12 soot blowing steam source pipe II, 121 safety valve II, 2 main steam source pipe, 21 branch steam source pipe, 211 steam source pipe I, 2111 soot blowing manual valve I, 212 steam source pipe II, 2121 soot blowing manual valve II, 213 steam source pipe III, 2131 soot blowing manual valve III, 214 steam source pipe IV, 2141 soot blowing manual valve IV, 215 steam source pipe V, 2151 soot blowing manual valve V, 3 electric isolating valve, 311 electric isolating valve I, 312 electric isolating valve II, 313 electric isolating valve III, 314 electric isolating valve IV, 4 flue soot blower I, 5 hearth soot blower, 6 flue soot blower II, 7 air preheater soot blower and 8 auxiliary steam source.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the invention.

A boiler soot blowing system comprises a main steam source pipe 2 communicated with a soot blowing steam source pipe 1, wherein a branch steam source pipe 21 is arranged on the main steam source pipe 2, an electric isolating valve 3 is arranged on the branch steam source pipe 21, and a soot blower used for timely soot blowing is arranged at the extending end of the branch steam source pipe 21.

Further, the branch steam source pipe 21 includes a first steam source pipe 211, a second steam source pipe 212, a third steam source pipe 213 and a fourth steam source pipe 214, the electric isolation valve 3 includes a first electric isolation valve 311, a second electric isolation valve 312, a third electric isolation valve 313 and a fourth electric isolation valve 314, and the first steam source pipe 211, the second steam source pipe 212, the third steam source pipe 213 and the fourth steam source pipe 214 are respectively provided with the first electric isolation valve 311, the second electric isolation valve 312, the third electric isolation valve 313 and the fourth electric isolation valve 314.

Furthermore, the extending ends of the first steam source pipe 211, the second steam source pipe 212, the third steam source pipe 213 and the fourth steam source pipe 214 are respectively communicated with a first flue soot blower 4, a second hearth soot blower 5, a second flue soot blower 6 and a second air preheater soot blower 7.

Furthermore, the fourth steam source pipe 214 is communicated with an auxiliary steam source 8 through a fifth steam source pipe 215.

Further, the soot blowing steam source pipe 1 comprises a first soot blowing steam source pipe 11 and a second soot blowing steam source pipe 12 which are used for transmitting a steam source for the main steam source pipe 2.

Example 1

Specifically, a first ash blowing manual valve 2111, a second ash blowing manual valve 2121, a third ash blowing manual valve 21318, a fourth ash blowing manual valve 2141 and a fifth ash blowing manual valve 2151 are respectively arranged on the first steam source pipe 211, the second steam source pipe 212, the third steam source pipe 213, the fourth steam source pipe 214 and the fifth steam source pipe 215.

Specifically, the first soot blowing steam source pipe 11 is used for conveying a steam source from an outlet of the platen superheater for the main steam source pipe 2.

Specifically, the second soot blowing steam source pipe 12 is a main steam source pipe 2 for transmitting a steam source from a low-temperature reheater.

In this embodiment, when a user wants to control each path of soot blower independently, only the steam source pipes of other paths need to be closed, for example, in this embodiment, the user wants to control the first furnace soot blower 5, the user can close the first electric isolation valve 311, the third electric isolation valve 313 and the fourth electric isolation valve 314, and accordingly close the steam source conveying in the first steam source pipe 211, the third steam source pipe 213 and the fourth steam source pipe 214, so that poppet valves of the first flue soot blower 4, the second flue soot blower 6 and the air preheater soot blower 7 are prevented from being in cold and heat exchange all the time, the service life of the soot blower poppet valves is prolonged, and the usage amount of soot blowing steam is saved; the manual soot blowing valve can provide various options for blocking a steam source to protect the soot blower for a user, such as closing the manual soot blowing valve and the electromagnetic isolation valve at the same time.

Specifically, when the system pressure exceeds a specified value, the first soot blowing steam source pipe 11, the first safety valve 111 and the second safety valve 121 on the second soot blowing steam source pipe 12 are opened, and a part of the first soot blowing steam source pipe 11 and the second soot blowing steam source pipe 12 is discharged into the main steam source pipe 2, so that the system pressure does not exceed an allowable value, and the system is prevented from accidents caused by overhigh pressure.

The above description is only exemplary of the present invention and should not be construed as limiting the present invention, and any modifications, equivalents and improvements made within the spirit and principles of the present invention are intended to be included within the scope of the present invention.

Claims

1. The utility model provides a boiler soot blowing system, includes main steam source pipe (2) with soot blowing steam source pipe (1) intercommunication, its characterized in that: a branch steam source pipe (21) is arranged on the main steam source pipe (2), an electric isolating valve (3) is arranged on the branch steam source pipe (21), and a soot blower for timely blowing soot is arranged at the extending end of the branch steam source pipe (21).

2. A boiler sootblowing system as claimed in claim 1, wherein: the branch steam source pipe (21) comprises a first steam source pipe (211), a second steam source pipe (212), a third steam source pipe (213) and a fourth steam source pipe (214), the electric isolation valve (3) comprises a first electric isolation valve (311), a second electric isolation valve (312), a third electric isolation valve (313) and a fourth electric isolation valve (314), and the first steam source pipe (211), the second steam source pipe (212), the third steam source pipe (213) and the fourth steam source pipe (214) are respectively provided with the first electric isolation valve (311), the second electric isolation valve (312), the third electric isolation valve (313) and the fourth electric isolation valve (314).

3. A boiler sootblowing system as claimed in claim 2, wherein: the extension ends of the first steam source pipe (211), the second steam source pipe (212), the third steam source pipe (213) and the fourth steam source pipe (214) are respectively communicated with a first flue soot blower (4), a hearth soot blower (5), a second flue soot blower (6) and a soot blower (7) of an air preheater.

4. A boiler sootblowing system as claimed in claim 3, wherein: and the fourth steam source pipe (214) is communicated with an auxiliary steam source (8) through a fifth steam source pipe (215).

5. A boiler sootblowing system as claimed in claim 1, wherein: the soot blowing steam source pipe (1) comprises a first soot blowing steam source pipe (11) and a second soot blowing steam source pipe (12) which are used for transmitting a steam source for the main steam source pipe (2).

6. A boiler sootblowing system as claimed in claim 5, wherein: and a first safety valve (111) and a second safety valve (121) are respectively arranged on the first soot blowing steam source pipe (11) and the second soot blowing steam source pipe (12).