CN217329763U

CN217329763U - Flute-shaped pipe water spraying desuperheater with cooling device

Info

Publication number: CN217329763U
Application number: CN202120796240.2U
Authority: CN
Inventors: 曹建文; 朱一飞; 吴明州; 张贤; 尤鸿燕; 刘琛
Original assignee: Shanghai Power Equipment Research Institute Co Ltd
Current assignee: Shanghai Power Equipment Research Institute Co Ltd
Priority date: 2021-04-19
Filing date: 2021-04-19
Publication date: 2022-08-30
Anticipated expiration: 2031-04-19

Abstract

The utility model provides a flute-shaped pipe water spray desuperheater with a cooling device, which comprises a flute-shaped spray pipe, wherein a cooling steam sleeve pipe is wrapped outside the flute-shaped spray pipe, and a cooling steam flowing cavity is formed between the flute-shaped spray pipe and the cooling steam sleeve pipe; the mixing pipe with openings at two ends is coaxially arranged in the steam pipeline, the flute-shaped spray pipe and the cooling steam sleeve are radially inserted into the steam pipeline and the mixing pipe, and the cooling steam sleeve is fixed on the outer wall of the steam pipeline through the pipe seat; the flute-shaped spray pipe is provided with a nozzle, and the nozzle is positioned in the mixing pipe. The device provided by the utility model reduces flute shape spray tube outer wall temperature through cooling steam, has reduced the difference in temperature between desuperheating water and flute shape spray tube outer wall temperature, and then has reduced the difference in temperature stress in the flute shape spray tube when the water spray desuperheater drops back at every turn, is favorable to improving the life of water spray desuperheater.

Description

Flute-shaped pipe water spraying desuperheater with cooling device

Technical Field

The utility model relates to a water spray desuperheater, in particular to water spray desuperheater with a protection device.

Background

In general, during actual operation of a boiler, the influence factors of the temperature of superheated steam and reheated steam are many, and fluctuation thereof is inevitable. In order to ensure safe, economical and stable operation of the boiler unit, some steam regulation modes are necessary. Currently, there are two main ways of steam conditioning: steam side conditioning and flue gas side conditioning. The water spray desuperheater is the main attemperation device for steam side regulation.

Because the temperature difference between the desuperheating water and the superheated steam or the reheated steam is large, each time the desuperheating water is thrown or withdrawn, large alternating stress is generated. And at present, in many power plants, the coal quality change is large and the load adjustment is wide, so that the adjustment and the start-stop of the water spray desuperheater in the superheater or the reheater are frequent. Under the action of the long-term alternating temperature difference stress, a flute-shaped pipe nozzle of the water spray desuperheater is easy to generate fatigue failure. And the damage of flute venturi tube nozzle of water spray desuperheater can make the desuperheating water can not obtain effectual atomizing simultaneously, makes it can not carry out intensive mixing with superheated steam or reheat steam, leads to other equipment, such as desuperheater urceolus, collection incasement wall etc. to damage under the alternating stress effect.

SUMMERY OF THE UTILITY MODEL

The to-be-solved technical problem of the utility model is: how to prolong the service life of the water spray desuperheater.

In order to solve the technical problem, the technical scheme of the utility model provides a flute venturi tube water spray desuperheater from taking cooling device, its characterized in that: the cooling steam device comprises a flute-shaped spray pipe, wherein a cooling steam sleeve is wrapped on the outer side of the flute-shaped spray pipe, and a cooling steam flowing chamber is formed between the flute-shaped spray pipe and the cooling steam sleeve;

the mixing pipe with openings at two ends is coaxially arranged in the steam pipeline, the flute-shaped spray pipe and the cooling steam sleeve are radially inserted into the steam pipeline and the mixing pipe, and the cooling steam sleeve is fixed on the outer wall of the steam pipeline through the pipe seat; the flute-shaped spray pipe is provided with a nozzle, and the nozzle is positioned in the mixing pipe.

Preferably, the top of the flute-shaped spray pipe is provided with a temperature-reducing water inlet.

Preferably, a cooling steam inlet is formed in one side of the cooling steam sleeve.

Preferably, the lower end part of the flute-shaped spray pipe and the lower end part of the cooling steam sleeve are in a sealed state.

Preferably, the bottom of the inner wall of the mixing pipe is provided with a limiting pipe seat used for limiting the vibration of the flute-shaped spray pipe and the cooling steam sleeve but allowing the flute-shaped spray pipe and the cooling steam sleeve to freely expand, and the lower end part of the cooling steam sleeve is inserted into the limiting pipe seat.

The utility model provides a when flute venturi tube water spray desuperheater from taking cooling device uses, during high temperature steam in the steam conduit got into the hybrid tube, desuperheating water in the flute venturi tube got into the hybrid tube through the nozzle with high temperature steam mixes. And cooling steam with certain temperature and certain flow is ensured to continuously flow through a cooling steam flowing cavity between the flute-shaped spray pipe and the cooling steam sleeve, and the outer wall of the flute-shaped spray pipe is cooled through the cooling steam.

The device provided by the utility model reduces flute shape spray tube outer wall temperature through cooling steam, has reduced the difference in temperature between desuperheating water and flute shape spray tube outer wall temperature, and then has reduced the difference in temperature stress in the flute shape spray tube when the water spray desuperheater drops back at every turn, is favorable to improving the life of water spray desuperheater.

Drawings

Fig. 1 is a schematic structural view of a flute-shaped pipe water spray desuperheater with a cooling device provided in this embodiment.

Detailed Description

Fig. 1 is a schematic structural view of a flute-shaped pipe water spray desuperheater provided with a cooling device in this embodiment, the flute-shaped pipe water spray desuperheater provided with the cooling device includes a flute-shaped spray pipe 1, a cooling steam sleeve 3 is wrapped outside the flute-shaped spray pipe 1, and a cooling steam flowing chamber is formed between the flute-shaped spray pipe 1 and the cooling steam sleeve 3.

The mixing pipe 6 is coaxially arranged in the steam pipeline 5, the flute-shaped spray pipe 1 and the cooling steam sleeve 3 are radially inserted into the steam pipeline 5 and the mixing pipe 6, and the cooling steam sleeve 3 is fixed on the outer wall of the steam pipeline 5 through the pipe seat 4.

The top of the flute-shaped spray pipe 1 is provided with a desuperheating water inlet 11, one side of the cooling steam sleeve 3 is provided with a cooling steam inlet 31, and the cooling steam inlet 31 is positioned below the pipe joint 2 at the top of the flute-shaped spray pipe 1 and above the steam pipeline 5.

The lower end 12 of the flute-shaped nozzle 1 and the lower end 32 of the cooling steam jacket 3 are both sealed and inserted into the limiting tube seat 8 at the bottom of the mixing tube 6, limiting its vibration but allowing its free expansion.

The flute-shaped spray pipe 1 is provided with a nozzle 7, the nozzle 7 is positioned in the mixing pipe 6, two ends of the mixing pipe 6 are opened, high-temperature steam in the steam pipeline 5 enters the mixing pipe 6, desuperheating water in the flute-shaped spray pipe 1 enters the mixing pipe 6 through the nozzle 7 to be mixed with the high-temperature steam, and as shown in fig. 1, A in fig. 1 represents the steam flow direction.

The cooling steam flow chamber between the flute-shaped spray pipe 1 and the cooling steam sleeve 3 ensures that cooling steam with certain temperature and certain flow rate continuously flows through, the cooling steam can be from a low-temperature superheater steam inlet pipe, a low-temperature reheater steam inlet pipe and the like, and the specific temperature and flow rate are determined by steam parameters in a steam pipeline 5 where the flute-shaped spray pipe 1 is located. And cooling the outer wall of the flute-shaped spray pipe 1 by cooling steam.

The shape parameters of the cooling steam sleeve 3 are obtained by relevant strength calculation and thermal calculation.

The flute venturi tube water spray desuperheater from taking cooling device that this embodiment provided has reduced flute and has spouted outside of tubes wall temperature, has reduced the difference in temperature between desuperheating water and flute and has spouted outside of tubes wall temperature, and then has reduced the difference in temperature stress in the flute shape spray tube when the water spray desuperheater is thrown to move back at every turn, is favorable to improving water spray desuperheater's life.

The foregoing is merely a preferred embodiment of the present invention, and is not intended to limit the present invention in any way and in any way, and it should be understood that modifications and additions may be made by those skilled in the art without departing from the method of the present invention, and such modifications and additions are also considered to be within the scope of the present invention. Those skilled in the art can make various changes, modifications and evolutions equivalent to those made by the above-disclosed technical content without departing from the spirit and scope of the present invention, and all such changes, modifications and evolutions are equivalent embodiments of the present invention; meanwhile, any changes, modifications and evolutions of equivalent changes to the above embodiments according to the actual technology of the present invention are also within the scope of the technical solution of the present invention.

Claims

1. The utility model provides a flute venturi tube water spray desuperheater from taking cooling device which characterized in that: the device comprises a flute-shaped spray pipe (1), wherein a cooling steam sleeve (3) is wrapped on the outer side of the flute-shaped spray pipe (1), and a cooling steam flowing chamber is formed between the flute-shaped spray pipe (1) and the cooling steam sleeve (3);

the mixing pipe (6) with openings at two ends is coaxially arranged in the steam pipeline (5), the flute-shaped spray pipe (1) and the cooling steam sleeve (3) are radially inserted into the steam pipeline (5) and the mixing pipe (6), and the cooling steam sleeve (3) is fixed on the outer wall of the steam pipeline (5) through the pipe seat (4); and a nozzle (7) is arranged on the flute-shaped spray pipe (1), and the nozzle (7) is positioned in the mixing pipe (6).

2. A flute tube spray desuperheater with cooling apparatus as defined in claim 1 wherein: the top of the flute-shaped spray pipe (1) is provided with a desuperheating water inlet (11).

3. A flute tube spray desuperheater with cooling apparatus as defined in claim 1 wherein: and a cooling steam inlet (31) is formed in one side of the cooling steam sleeve (3).

4. A flute tube spray desuperheater with self-contained cooling apparatus, as defined in claim 1, wherein: the lower end part (12) of the flute-shaped spray pipe (1) and the lower end part (32) of the cooling steam sleeve (3) are in a sealed state.

5. A flute tube spray desuperheater with self-contained cooling apparatus, as defined in claim 1, wherein: the bottom of the inner wall of the mixing pipe (6) is provided with a limiting pipe seat (8) which is used for limiting the vibration of the flute-shaped spray pipe (1) and the cooling steam sleeve (3) but allowing the flute-shaped spray pipe and the cooling steam sleeve to freely expand, and the lower end part (32) of the cooling steam sleeve (3) is inserted into the limiting pipe seat (8).