Water spraying desuperheater suitable for large-capacity boiler

Abstract

The utility model provides a spray desuperheater suitable for a large-capacity boiler, which comprises an outer cylinder for circulating superheated steam, an opening is arranged on the side wall of the upper side of the outer cylinder and is connected with a pipe seat, and a spray pipe penetrates through the pipe seat and is inserted into the outer cylinder and an inner sleeve of the outer cylinder from top to bottom. A threaded hole is formed in the lower part of the round steel, and the round steel is fixed on the side wall of the lower side of the outer cylinder body through a screw; a flange is welded to the upper end of the water spraying pipe and used for being connected with an external pipeline. The outer side of a pipe body of the water spraying pipe is connected with a flange cover with a hole in a welded mode, and the flange cover is fixedly connected with the upper end face of the pipe base in a sealed mode through a detachable fastening device. By the adoption of the structure, the water spraying pipe can be rapidly and conveniently connected with the pipe base on the outer barrel, and maintenance and replacement are convenient; when the steam quantity of the main steam pipeline is large, the upper portion and the lower portion of the water spraying pipe are fixed, the water spraying pipe cannot shake, water spraying is even and stable, and therefore the water spraying effect is guaranteed.

Description

Technical Field

[0001] The utility model relates to a main steam temperature regulating device for a steam boiler, in particular to a water spraying desuperheater suitable for a large-capacity boiler. Background Art

[0002] The water spray desuperheater is a contact heat exchanger that sprays desuperheating water directly into superheated steam. The desuperheating water droplets atomized by the nozzle absorb heat from the steam, then vaporize and mix with the steam, thereby reducing the temperature of the superheater steam.

[0003] Water spray desuperheaters can be divided into nozzle type, Venturi tube type, vortex type and flute tube type according to the water spraying method.

[0004] The bottom of the spray pipe of the commonly used water spray desuperheater is not fixed to the cylinder. When the steam volume is too large, the spray pipe of the water spray desuperheater is easily shaken by the steam, and the water spray is uneven, thus affecting the water spray effect. Utility Model Content

[0005] In view of the above technical problems, the utility model provides a water spray desuperheater suitable for large-capacity boilers, which solves the technical problem that the existing structure is prone to vibration.

[0006] The technical solution adopted by the utility model is:

[0007] A water spray desuperheater suitable for a large-capacity boiler, characterized in that it comprises an outer cylinder body for superheated steam to circulate inside, an upper side wall of the outer cylinder body is provided with an opening and connected to a pipe seat, a coaxially arranged inner sleeve is provided in the position of the outer cylinder body corresponding to the pipe seat, and the inner sleeve is also provided with an opening corresponding to the opening of the outer cylinder body, a water spray pipe passes through the pipe seat and is inserted into the outer cylinder body and the inner sleeve from top to bottom, wherein:

[0008] The part of the water spray pipe extending into the inner sleeve is provided with a water spray port, the lower end of the water spray pipe is filled with round steel to form a seal, the lower part of the round steel has a threaded hole and is fixed to the lower side wall of the outer cylinder by screws;

[0009] A flange is welded to the upper end of the water spray pipe for connection with an external pipeline;

[0010] The outer side of the pipe body of the water spray pipe is welded to the flange cover with an opening, and a detachable fastening device is used to form a fixed sealing connection between the flange cover and the upper end surface of the pipe seat.

[0011] The water spray desuperheater suitable for large-capacity boilers is characterized in that a gasket is installed between the flange cover and the upper end surface of the tube seat.

[0012] The water spray desuperheater suitable for large-capacity boilers, wherein the detachable fastening device is a bolt and a nut.

[0013] The water spray desuperheater suitable for large-capacity boilers, wherein the inner sleeve and the outer cylinder are fixed in both radial and axial directions by fastening nails.

[0014] The water spray desuperheater suitable for large-capacity boilers has a plurality of ribs welded between the water spray pipe and the bottom surface of the flange cover, and the plurality of ribs extend downward along the outer wall of the water spray pipe.

[0015] The water spray desuperheater suitable for large-capacity boilers is provided with a hand hole on the side of the outlet position of the outer cylinder, the hand hole position is connected with a hand hole pipe, and the outer end of the hand hole pipe is closed by a hand hole head.

[0016] The beneficial effects of the utility model are:

[0017] 1. The water spray pipe is not easy to vibrate, the water spray is even, and the cooling effect is good.

[0018] 2. The structure is simple and reliable, the processing cost is low, and it is suitable for the main steam pipeline of large-capacity boilers.

[0019] 3. Easy to disassemble and maintain. When maintaining, you only need to unscrew the bolts and nuts on the upper flange pipe seat and the screws on the lower part of the spray boom to pull out the entire spray boom.

[0020] 4. Equipped with a hand hole device for easy maintenance. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a longitudinal section of a water spray desuperheater suitable for a large-capacity boiler of the utility model;

[0022] Figure 2 yes Figure 1 AA section view (for convenience, the hand hole position is also shown in section view).

[0023] Explanation of the accompanying numbers: 1-outer cylinder; 2-inner sleeve; 3-screw; 4-spray pipe; 5-bolt; 6-nut; 7-washer; 8-flange cover; 9-gasket; 10-pipe seat; 11-steel ring; 12-fastening nail; 13-rib plate; 14-flange; 15-hand hole pipe; 16-hand hole head; 17-round steel. DETAILED DESCRIPTION

[0024] like Figure 1 , Figure 2As shown, the utility model provides a water spray desuperheater suitable for large-capacity boilers, including an outer cylinder 1 for superheated steam to flow inside, an upper side wall of the outer cylinder 1 is provided with an opening and connected to a pipe seat 10, a coaxially arranged inner sleeve 2 (fixed by a steel ring 11) is provided at a position corresponding to the pipe seat 10 in the outer cylinder 1, and an opening is also provided in the inner sleeve 2 corresponding to the opening of the outer cylinder 1, and a water spray pipe 4 passes through the pipe seat 10 and is inserted into the outer cylinder 1 and the inner sleeve 2 from top to bottom, wherein:

[0025] The part of the water spray pipe 4 extending into the inner sleeve 2 is provided with a water spray port, and the lower end of the water spray pipe 4 is filled with a round steel 17 to form a seal. The lower part of the round steel 17 has a threaded hole and is fixed to the lower side wall of the outer cylinder 1 by screws 3. This structure can facilitate the disassembly of the water spray pipe 4 and prevent the water spray pipe 4 from shaking;

[0026] The upper end of the water spray pipe 4 is welded with a flange 14, which is convenient for connection with an external pipeline, so that welding is not required, and it is easy to assemble with the pipeline;

[0027] A flange cover 8 with an opening is welded to the outside of the pipe body of the water spray pipe 4. A gasket 9 is installed between the flange cover 8 and the upper end surface of the pipe seat 10, and a fixed sealing connection is formed by bolts 5, nuts 6, and washers 7.

[0028] By adopting the above structure, the water spray pipe 4 can be quickly and conveniently connected to the pipe seat 10 on the outer cylinder 1, which is convenient for maintenance and replacement; when the steam volume of the main steam pipeline is large, since the upper and lower parts of the water spray pipe 4 are fixed, the water spray pipe 4 will not shake, and the water spray is uniform and stable, thereby ensuring the water spray effect.

[0029] In addition, since the utility model is provided with an inner sleeve 2, and the water spraying port on the water spraying pipe 4 is arranged in the inner sleeve 2, the sprayed cooling water does not directly contact the outer cylinder 1, which can avoid the problem of cracking of the outer cylinder 1 caused by the temperature difference between hot and cold.

[0030] The inner sleeve 2 and the outer cylinder 1 are fixed in both radial and axial directions by fastening nails 12, which is conducive to expansion and stable fixation;

[0031] Preferably, a plurality of ribs 13 are welded between the water spray pipe 4 and the bottom surface of the flange cover 8. The plurality of ribs 13 extend downward along the outer wall of the water spray pipe 4, thereby improving the stability of the water spray pipe 4 and preventing it from shaking.

[0032] The number and size of the water spray ports on the water spray pipe 4 can be determined according to the specific amount of water spray used; the material of the water spray desuperheater also needs to be determined according to the temperature of the steam.

[0033] like Figure 2 As shown, at the outlet position of the outer cylinder 1 ( Figure 1A hand hole is provided on the side of the cooler (at the middle right position), and a hand hole pipe 15 is connected to the hand hole position. The outer end of the hand hole pipe 15 is closed with a hand hole head 16. When the inside of the cooler needs to be inspected, the hand hole head 16 can be cut off, and then the internal situation of the cooler can be observed through special equipment.

[0034] When the utility model is used:

[0035] 1. When the main steam pipeline of the boiler is over-temperature, the electric regulating valve on the water supply pipeline of the water spray desuperheater is opened to make the water spray pipe 4 spray water. The amount of water sprayed is controlled by the opening of the electric regulating valve, thereby controlling the main steam temperature.

[0036] 2. During maintenance, first remove the bolts between the flange 14 on the upper part of the water spray pipe 4 and the pipe flange, then remove the bolts 5 connecting the flange cover 8 on the water spray pipe 4 and the pipe seat 10 on the outer cylinder 1, and finally unscrew the screws 3 at the bottom, and the entire water spray pipe 4 can be pulled out for replacement or maintenance.

[0037] 3. The electric regulating valve on the water supply pipe of the water spray desuperheater can be directly controlled in the central control room. When the main steam pipeline over-temperature alarm is triggered, the electric regulating valve can be directly opened in the central control room to achieve remote control.

Claims

1. A water spray desuperheater suitable for large-capacity boilers, characterized in that: It includes an outer cylinder for superheated steam to circulate inside, the upper side wall of the outer cylinder is provided with an opening and connected to a pipe seat, a coaxially arranged inner sleeve is provided in the position of the outer cylinder corresponding to the pipe seat, and the inner sleeve is also provided with an opening corresponding to the opening of the outer cylinder, and a water spray pipe passes through the pipe seat and is inserted into the outer cylinder and the inner sleeve from top to bottom, wherein: The part of the water spray pipe extending into the inner sleeve is provided with a water spray port, the lower end of the water spray pipe is filled with round steel to form a seal, the lower part of the round steel has a threaded hole and is fixed to the lower side wall of the outer cylinder by screws; A flange is welded to the upper end of the water spray pipe for connection with an external pipeline; The outer side of the pipe body of the water spray pipe is welded to the flange cover with an opening, and a detachable fastening device is used to form a fixed sealing connection between the flange cover and the upper end surface of the pipe seat.

2. The water spray desuperheater suitable for large-capacity boilers according to claim 1, characterized in that: A gasket is installed between the flange cover and the upper end surface of the pipe seat.

3. The water spray desuperheater suitable for large-capacity boilers according to claim 1, characterized in that: The detachable fastening device is a bolt and a nut.

4. The water spray desuperheater suitable for large-capacity boilers according to claim 1, characterized in that: The inner sleeve and the outer cylinder are fixed in radial and axial directions by fastening nails.

5. The water spray desuperheater suitable for large-capacity boilers according to claim 1, characterized in that: A plurality of rib plates are welded between the water spray pipe and the bottom surface of the flange cover, and the plurality of rib plates extend downward along the outer wall of the water spray pipe.

6. The water spray desuperheater suitable for large-capacity boilers according to claim 1, characterized in that: A hand hole is provided on the side of the outlet position of the outer cylinder, and a hand hole pipe is connected to the hand hole position, and the outer end of the hand hole pipe is closed by a hand hole head.

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