CN219389700U - Boiler heat exchange equipment - Google Patents

Abstract

The utility model belongs to the technical field of boilers, and particularly relates to a boiler heat exchange device, which comprises a plurality of rows of screen type superheaters, wherein each superheater comprises a header, a pipe clamp and a plurality of pipes, the pipes are connected with the header, the pipe clamp is fixedly connected with the pipes, a protection plate and a pretension piece are arranged on each screen type superheater, the protection plate corresponds to the upper parts of the pipes, the protection plate is fixed on the pipes, the pretension piece is arranged between the pipe clamp and the header and connects the pipe clamp and the header, a flow equalizing plate is arranged in the width direction of each screen type superheater, and the flow equalizing plate corresponds to the pipes; compared with the prior art, the utility model strengthens the corrosion resistance of the screen type superheater by adopting the high-temperature-resistant and corrosion-resistant pipe TP 347H; meanwhile, the protection plate is fixedly arranged on the screen-type superheater on the windward side, so that the screen-type superheater is further protected; the width direction of the heat exchange equipment is provided with the flow equalizing plate, so that corrosion and abrasion of the equipment are slowed down, and the service life of the equipment is prolonged.

Description

Boiler heat exchange equipment

Technical Field

The present utility model relates to a boiler, and more particularly, to a boiler heat exchange apparatus.

Background

The screen superheater belongs to boiler heat exchange equipment, and in an industrial boiler, the main steam temperature of a boiler screen superheater outlet is an important control parameter of a boiler unit, and the quality of control directly influences the safety and economic operation of the whole unit. In the operation process of the screen type superheater of the industrial boiler, the temperature of the screen type superheater is close to the highest bearing temperature of the metal of the superheater, the intensity of a superheater pipeline is reduced due to the fact that the steam temperature is too high, and the service life of the screen type superheater is shortened.

In the study of the superheater for the tube explosion, the applicant analyzed the following (as shown in fig. 1) by removing the tube panel and cutting the tube:

1. the first row of the windward side is totally damaged, which indicates that the abrasion and the scouring of the part are most serious;

2. the height direction is mainly concentrated at a position 2-3 meters away from the ceiling, and the analysis results are the comprehensive results of the gravity of the pipe screen and the steering smoke flushing at the position;

3. the middle damage is larger than the two side damage in the width direction of the boiler, and the data are high in the middle and low in the two sides, so that the distribution of the flow velocity of the whole flow field is met.

Disclosure of Invention

Aiming at the defects existing in the prior art, the utility model aims to provide boiler heat exchange equipment for solving the technical problems.

In order to achieve the above purpose, the present utility model provides the following technical solutions:

the utility model provides a boiler heat transfer apparatus, includes a plurality of row's screen type superheaters, the superheaters includes collection case, pipe clamp and a plurality of pipe, a plurality of pipes are connected with the collection case, pipe clamp and a plurality of pipe fixed connection are equipped with guard plate and pretension piece on the screen type superheaters, and the guard plate corresponds with the upper portion of a plurality of pipes, and the guard plate is fixed in on the pipe, pretension piece is arranged between pipe clamp and collection case and connecting pipe clamp and collection case, is equipped with the flow equalizing plate on the width direction of screen type superheaters, and the flow equalizing plate corresponds with a plurality of pipes.

Further, the tube is made of TP34H material, and a protective layer is arranged on the tube, and the protective layer is made of silicon carbide.

Further, the guard plate is rectangular, and the guard plate is made of TP34H materials.

Further, the pretension piece comprises a first spring, a sleeve, a screw rod and a second spring which are connected in sequence, the screw rod stretches into the sleeve and is in threaded connection with the sleeve, the first spring is connected with the header, and the second spring is connected with the pipe clamp.

Further, the pipe clamp comprises a locking piece and two clamping pieces, each clamping piece is composed of a first clamping plate, a middle plate and a second clamping plate which are sequentially connected, the first clamping plate and the second clamping plate are respectively provided with a concave portion corresponding to the pipe, each concave portion is provided with a plugging hole, each pipe is provided with a bolt plugged with each plugging hole, each middle plate is provided with a through hole, each locking piece is composed of a locking bolt and a locking nut, each locking bolt is matched with each through hole, and each second spring is movably connected with each locking spring.

Further, the flow equalizing plate is composed of a filter plate, a protective frame and a plug bush, wherein the filter plate is embedded in the protective frame, the plug bush is fixed on the protective frame, and the plug bush is plugged with the clamping piece.

By adopting the technical scheme, the utility model has the beneficial effects that:

1. the corrosion resistance of the screen type superheater is emphasized by adopting a high-temperature-resistant and corrosion-resistant pipe TP 347H; meanwhile, the protection plate is fixedly arranged on the screen-type superheater on the windward side, so that the screen-type superheater is further protected;

2. the header is connected with the pipe clamp through the pre-tightening piece, so that the pipe is lifted upwards, the strength of the stressed part of the pipe under the action of gravity is increased, and the pipe is further reinforced;

3. the width direction of the heat exchange equipment is provided with the flow equalizing plate, so that corrosion and abrasion of the equipment are slowed down, and the service life of the equipment is prolonged.

Drawings

Fig. 1 is a schematic view of a superheater in the prior art.

Fig. 2 is a schematic structural view of the present utility model.

Fig. 3 is a schematic top view of the present utility model.

Fig. 4 is a schematic structural view of the pretensioner.

Fig. 5 is a schematic structural view of the pipe clamp.

Fig. 6 is a schematic structural diagram of the flow equalization plate.

Description of the embodiments

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 understood that the terms "upper," "lower," "front," "rear," "left," "right," "top," "bottom," "inner," "outer," and the like indicate or are based on the orientation or positional relationship shown in the drawings, merely to facilitate description of the present utility model and to simplify the description, and do not indicate or imply that the devices or elements referred to must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the present utility model.

As shown in fig. 2 and 3, the boiler heat exchange device comprises a plurality of rows of screen type superheaters, the superheaters comprise a header 1, a pipe clamp 2 and a plurality of pipes 3, the pipes 3 are connected with the header 1, the pipe clamp 2 is fixedly connected with the pipes 3, a protection plate 4 and a pretension piece 5 are arranged on the screen type superheaters, the protection plate 4 shields the upper parts (vulnerable parts) of the pipes 3, especially the first row of screen type superheaters which are arranged on a windward side, the protection plate 4 is fixed on the pipes 3, the pretension piece 5 is arranged between the pipe clamp 2 and the header 1 and is connected with the pipe clamp 2 and the header 1, a flow equalizing plate 6 is arranged on the width direction of the screen type superheaters, the flow equalizing plate 6 shields the side parts of the pipes 3 on the plurality of rows of screen type superheaters, the pipes 3 and the protection plate 4 are composed of TP34H materials, and a protection layer composed of silicon carbide is arranged on the outer walls of the pipes 3.

The shielding plates 4 are additionally arranged on the first row of the screen type superheaters corresponding to the windward side, and the shielding plates 4 can be selectively arranged on the other rows of the screen type superheaters; the protection plate 4 shields the corresponding parts of the pipe 3, so that the parts are not easy to be eroded and damaged by the flue gas; the header 1 is connected with the pipe clamp 2 through the pre-tightening piece 5, so that the upward lifting of the pipe 3 is realized, the strength of the stressed part of the pipe 3 under the action of gravity is increased, and the strength of the pipe 3 on the superheater is further enhanced; the flow equalizing plates 6 are arranged on two sides of the heat exchange equipment, so that the flue gas flow fields on two sides of the heat exchange equipment are more uniform, and corrosion and abrasion of flue gas to the equipment are further slowed down.

As shown in fig. 4 and 5, the pretensioner 5 is composed of a first spring 51, a sleeve 52, a screw 53 and a second spring 54 which are sequentially connected, the screw 53 extends into the sleeve 52 and is in threaded connection with the sleeve 52, the first spring 51 is connected with the header 1, the pipe clamp 2 comprises a locking member 21 and two clamping pieces 22, each clamping piece 22 is composed of a first clamping plate 221, a middle plate 222 and a second clamping plate 223 which are sequentially connected, the first clamping plate 221 and the second clamping plate 223 are respectively provided with a concave part corresponding to the pipe 3, the concave part is provided with a plugging hole 201, the pipe 3 is provided with a plug pin 31 plugged with the plugging hole 201, the middle plate 222 is provided with a through hole 202, the locking member 21 is composed of a locking bolt 211 and a locking nut 212, the locking bolt 211 is matched with the through hole 202, and the second spring 54 is movably connected with the locking spring.

When the pretensioner 5 is installed between the header 1 and the pipe clamp 2, the first spring 51 and the second spring 54 are in a stretched state, and then the tightness of the first spring 51 and the second spring 54 can be adjusted by rotating the sleeve 52 or the screw 53; under the elastic force of the first spring 51 and the second spring 54, the pipe clamp 2 has upward lifting force on the pipe 3, so that the overall strength of the pipe 3 is greatly enhanced;

the pipes 3 are placed between the two clamping pieces 22, the corresponding two concave parts on the two clamping pieces 22 clamp the pipes 3, meanwhile, the bolts 31 on the pipes 3 are inserted into the inserting holes 201, finally, the locking bolts 211 sequentially pass through the through holes 202 of the two clamping pieces 22, and the locking bolts 211 are in threaded connection with the locking nuts 212 to fixedly connect the pipe clamps 2 with the pipes 3.

As shown in fig. 6, the flow equalizing plate 6 is composed of a filter plate 61, a protective frame 62 and a plug bush 63, the filter plate 61 is embedded in the protective frame 62, the plug bush 63 is fixed on the protective frame 62, and the plug bush 63 is plugged with the clamping piece 22.

The flow equalizing plates 6 are arranged on two sides of the heat exchange equipment, and the end parts of the clamping pieces 22 extend into the plug bush 63 and are in interference fit with the plug bush 63, so that the flow equalizing plates 6 are fixed on the heat exchange equipment; the filter plates 61 correspond to the side ends of the plurality of tubes 3, and the flow of the flue gas after passing through the filter plates 61 is more uniform, so that the tubes 3 are not easily corroded and damaged by the flue gas.

The above description is only a preferred embodiment of the present utility model, and is not intended to limit the utility model, but one skilled in the art can make common changes and substitutions within the scope of the technical solution of the present utility model.

Claims (6)

1. The boiler heat exchange equipment comprises a plurality of rows of screen type superheaters, wherein each superheater comprises a header, a pipe clamp and a plurality of pipes, the pipes are connected with the header, the pipe clamp is fixedly connected with the pipes,

the screen type superheater is provided with a protection plate and a pretension piece, the protection plate corresponds to the upper parts of the pipes, the protection plate is fixed on the pipes, the pretension piece is arranged between the pipe clamp and the header and connects the pipe clamp and the header,

and a flow equalizing plate is arranged in the width direction of the screen-type superheater, and corresponds to the plurality of pipes.

2. A boiler heat exchange apparatus according to claim 1, wherein the tubes are formed of TP34H material, and a protective layer is provided on the tubes, the protective layer being formed of silicon carbide.

3. A boiler heat exchange apparatus according to claim 2, wherein the shield plate is rectangular and is composed of TP34H material.

4. A boiler heat exchange apparatus according to claim 2 or 3, wherein the pre-tightening member is constituted by a first spring, a sleeve, a screw and a second spring connected in sequence, the screw extending into the sleeve and being screwed to the sleeve, the first spring being connected to the header, the second spring being connected to the pipe clamp.

5. The boiler heat exchange equipment according to claim 4, wherein the pipe clamp comprises a locking piece and two clamping pieces, the clamping pieces are composed of a first clamping plate, a middle plate and a second clamping plate which are sequentially connected, the first clamping plate and the second clamping plate are respectively provided with a concave part corresponding to the pipe, the concave part is provided with a plugging hole, the pipe is provided with a bolt plugged with the plugging hole, the middle plate is provided with a through hole, the locking piece is composed of a locking bolt and a locking nut, the locking bolt is matched with the through hole, and the second spring is movably connected with the locking spring.

6. The boiler heat exchange device according to claim 5, wherein the flow equalizing plate is composed of a filter plate, a protective frame and a plug bush, the filter plate is embedded in the protective frame, the plug bush is fixed on the protective frame, and the plug bush is plugged with the clamping piece.