CN212691712U

CN212691712U - Assembled shell superheated steam boiler

Info

Publication number: CN212691712U
Application number: CN202021525430.2U
Authority: CN
Inventors: 孙长新; 张雪芹; 焦健浩
Original assignee: Qingdao Ferroli Hvac Temperature Control Technology And Equipment Mfg Co ltd
Current assignee: Qingdao Ferroli Hvac Temperature Control Technology And Equipment Mfg Co ltd
Priority date: 2020-07-29
Filing date: 2020-07-29
Publication date: 2021-03-12
Anticipated expiration: 2030-07-29

Abstract

The utility model discloses an assembled shell superheated steam boiler, which comprises a main boiler body and a superheater; the superheater comprises a box body, and a bottom plate of the box body is provided with a smoke inlet; smoke baffles are arranged on the bottom plates of the box body at the two sides of the smoke inlet; a smoke outlet is arranged on the bottom plate of the box body between the smoke baffle plate and the side wall of the box body; a horizontal snakelike heat exchange tube is arranged between the two flue gas baffles; the steam inlet end of the horizontal serpentine heat exchange tube is communicated with an inlet intermediate header, the inlet intermediate header is communicated with an inlet header, and the inlet header is communicated with a steam outlet pipe of the boiler main machine; the steam outlet end of the horizontal serpentine heat exchange tube is communicated with the outlet middle header, the outlet middle header is communicated with the outlet header, and the outlet header is communicated with the superheated steam outlet tube. The utility model discloses a set up the over heater on the boiler host computer, heat the steam of boiler host computer steam outlet pipe once more in the over heater box through the cigarette that comes of two return tube bundles to obtain superheated steam, prevent the condensation among the steam transportation process.

Description

Assembled shell superheated steam boiler

Technical Field

The utility model belongs to the boiler field, concretely relates to assembled pot shell superheated steam boiler.

Background

The oil-gas boiler can be structurally divided into a boiler shell boiler and a water pipe boiler.

Although the water tube boiler has better pressure bearing, the structure is relatively complex, the production and the manufacture consume man-hour are higher, the occupied area is larger, and the convection bank is not easy to overhaul, so the water tube boiler is mainly used for boilers with high pressure and large capacity.

The shell boiler has large water capacity, good adaptability to load change and low requirement on water quality; the cylindrical hearth is favorable for oil-gas fuel combustion, high thermal efficiency can be achieved by adopting a micro-positive pressure combustion mode, and the boiler is simpler and more compact in structure due to the application of enhanced heat transfer technologies such as the threaded smoke tube, the turbulence strips and the turbulence plates. Therefore, shell boilers are widely used in small capacity, low pressure applications.

However, when the steam boiler is far away from the user, the saturated steam generated by the boiler is easy to condense during the transportation process, which affects the quality of the steam on one hand, and on the other hand, the condensed water is accumulated in the steam transportation pipeline, which affects the service life of the pipeline, and most of the existing shell boilers are saturated steam boilers.

Therefore, it is desirable to design a superheated shell steam boiler that prevents condensation during steam delivery by generating superheated steam.

SUMMERY OF THE UTILITY MODEL

The utility model aims at overcoming the defects of the prior art and providing an assembled shell superheated steam boiler.

In order to achieve the above purpose, the utility model adopts the following technical scheme:

an assembled shell superheated steam boiler comprises a boiler main machine, wherein the boiler main machine adopts a shell type three-pass structure; the top end of a front smoke box of the boiler main machine is provided with a superheater;

the superheater comprises a box body, wherein the middle part of a bottom plate of the box body is provided with a smoke inlet communicated with a two-return tube bundle in a boiler main machine; the box body bottom plates at two sides of the smoke inlet are symmetrically provided with smoke baffles extending upwards; a smoke outlet communicated with a three-return tube bundle in the boiler main machine is formed in a bottom plate of the box body between the smoke baffle plate and the corresponding side wall of the box body;

a plurality of horizontal drainage serpentine heat exchange tubes are arranged between the two flue gas partition plates along the vertical direction, and the bent parts of the horizontal serpentine heat exchange tubes penetrate through the corresponding flue gas partition plates and are fixedly connected with the corresponding flue gas partition plates;

the steam inlet end of the horizontal serpentine heat exchange tube is communicated with an inlet middle header extending along the vertical direction, the top of the inlet middle header is communicated with an inlet header, and the inlet header is communicated with a steam outlet tube of a boiler main machine;

the steam outlet end of the horizontal type serpentine heat exchange tube is communicated with an outlet middle header extending in the vertical direction, the top of the outlet middle header is communicated with an outlet header, and the outlet header is communicated with a superheated steam outlet tube.

Preferably, a steel strip is spirally wound on the horizontal snakelike heat exchange tube between the two flue gas baffles.

Preferably, a rectangular flue gas adjusting opening is formed in the middle of the lower end of the flue gas partition plate, and a flue gas adjusting plate is arranged in the rectangular flue gas adjusting opening;

the middle part of one side of the smoke adjusting plate is fixedly provided with an adjusting shaft extending along the width direction of the smoke baffle plate;

one end of the adjusting shaft penetrates through the corresponding side wall of the box body and is in rotary connection with the corresponding side wall of the box body; an adjusting handle is vertically and fixedly arranged at one end of the adjusting shaft penetrating out of the side wall of the box body, a stud is vertically and outwards arranged at the end part of the adjusting handle, and a butterfly nut is arranged on the stud;

the outer end of the side wall of the box body corresponding to the adjusting handle is provided with an adjusting cylinder, and the outer end of the adjusting cylinder is provided with a sealing plate; and the seal plate is provided with an annular track for the stud to pass through.

Preferably, the bottom plate of the box body is detachably connected with the boiler main machine through bolts.

Preferably, the rear end of a flue gas outlet pipe of the boiler main machine is sequentially provided with an economizer and a condenser;

the energy saver comprises an energy saving box body, and a flue gas inlet at the bottom of the energy saving box body is communicated with a flue gas outlet pipe of the boiler main machine; a plurality of rows of first vertical type serpentine heat exchange tubes are arranged in the energy saver; the top inlet end of the first vertical serpentine heat exchange tube is connected with the water inlet of the energy saver, and the bottom outlet end of the first vertical serpentine heat exchange tube is connected with the water outlet of the energy saver;

the condenser comprises a condensing box body, and a bottom flue gas inlet of the condensing box body is communicated with a top flue gas outlet of the energy saver; a plurality of rows of second vertical type serpentine heat exchange tubes are arranged in the condenser; the top inlet end of the second vertical serpentine heat exchange tube is connected with the water inlet of the condenser, and the bottom outlet end of the second vertical serpentine heat exchange tube is connected with the water outlet of the condenser;

and a chimney is arranged at a top smoke outlet of the condenser.

Preferably, the straight pipe sections of the first vertical type serpentine heat exchange pipe and the second vertical type serpentine heat exchange pipe are spirally wound with steel strips.

Preferably, a furnace is arranged in the boiler main machine, a burner is arranged at the front end of the furnace, and a back-burning chamber is arranged at the back end of the furnace;

the front end and the rear end of the boiler main machine are respectively provided with a front tube plate and a rear tube plate; the front tube plate and a front smoke box of the boiler main machine form a front smoke chamber, and the rear tube plate and a rear smoke box of the boiler main machine form a rear smoke chamber;

a two-return tube bundle and a three-return tube bundle which are arranged layer by layer are arranged above the furnace pipe;

the inlets of the two return tube bundles are communicated with the back combustion chamber, the outlets of the two return tube bundles are communicated with the front smoke chamber, and the front smoke chamber is communicated with the smoke inlet at the bottom of the superheater box body;

the inlet of the three-return tube bundle is communicated with a smoke outlet at the bottom of the superheater box body, the outlet of the three-return tube bundle is communicated with a rear smoke chamber, and the rear smoke chamber is communicated with a smoke outlet pipe of the boiler main machine;

and a boiler water inlet of the boiler main machine is communicated with an economizer water outlet of the economizer.

Preferably, a steam-water separator is arranged at the front end of a steam outlet pipe in the boiler main machine;

the steam-water separator comprises a first separating shell and a second separating shell;

the first separating shell is of a tubular structure which is transversely arranged and two ends of the first separating shell are blocked, and the upper part of the side wall of the first separating shell is provided with a through hole which is used for being connected with the bottom end of a steam outlet pipe in the boiler main machine; a plurality of shell steam-homogenizing through holes are formed in the upper part of the side wall of the separated shell at the two sides of the through hole; a plurality of first-shell drain holes are formed in the lower part of the side wall of the first separation shell along the length direction;

the separation second shell is positioned outside the separation first shell; the separation two-shell comprises two gap baffles which extend along the length direction of the separation one-shell and are symmetrically arranged, and the bottoms of the two gap baffles are fixedly connected; two ends of the two gap baffles are fixedly provided with two shell seal plates; the top parts of the gap baffle and the two-shell sealing plate are fixedly connected with the inner wall of the boiler main machine;

the lower part of the gap baffle is of an inward bending structure; the upper part of the vertical section at the upper end of the gap baffle is provided with a plurality of strip-shaped through holes; the bottom of the separation second shell is provided with a plurality of drain pipes;

a separation third shell is symmetrically arranged outside the gap baffles at the two sides of the separation second shell;

the three separation shells comprise steam-homogenizing pore plates, and the upper ends and the lower ends of the steam-homogenizing pore plates are of bent structures; two ends of the steam homogenizing hole plate are fixedly provided with three shell seal plates; the upper end and the lower end of the steam equalizing pore plate and the end part of the three-shell sealing plate are fixedly connected with the outer end face of the vertical end at the upper part of the corresponding gap baffle;

a plurality of three-shell steam-homogenizing through holes are uniformly formed in the middle vertical section of the steam-homogenizing pore plate;

the lower part of the vertical section at the upper end of the gap baffle is provided with a plurality of drainage holes;

the strip-shaped through hole and the drain hole on the gap baffle are positioned between the upper end and the lower end of the corresponding steam-homogenizing hole plate;

and a steel wire mesh separator is arranged on the inner side of the three separation shells.

Preferably, the wire mesh separator comprises a plurality of layers of compacted wire mesh.

Preferably, the wire mesh separator comprises 4 or 5 layers of compacted wire mesh.

The utility model has the advantages that:

(1) the utility model discloses a set up the over heater on the boiler host computer, heat the steam of boiler host computer steam outlet pipe once more in the over heater box through the cigarette that comes of two return tube bundles to obtain superheated steam, prevent the condensation among the steam transportation process.

(2) When the smoke adjusting plate rotates, part of smoke coming from the two-return tube bundle in the boiler main machine directly returns to the three-return tube bundle in the boiler main machine along the gap between the smoke adjusting plate and the smoke baffle plate, and does not participate in the heat exchange process of steam in the horizontal snake-shaped heat exchange tube in the superheater; the actual smoke quantity entering the superheater and exchanging heat with steam is controlled through the rotation of the smoke adjusting plate, and the temperature of superheated steam at the outlet of the superheater is adjusted; wherein, through the different turned angle who transfers the cigarette board, realize the regulation of cigarette volume, and then realize the regulation of the different superheated steam temperature in superheater export.

(3) The steam-water separator in the boiler main body in the utility model comprises a separating three-shell, a steel wire mesh separator, a separating two-shell and a separating one-shell, so that the wet steam in the boiler main body realizes multi-stage separation, and the separation effect is improved; the steam quality after multistage separation is greatly improved, and the steam quality entering the superheater is greatly improved.

Drawings

The accompanying drawings, which are incorporated in and constitute a part of this application, illustrate embodiments of the application and, together with the description, serve to explain the application and are not intended to limit the application.

FIG. 1 is a schematic view of the external structure of the assembled shell superheated steam boiler of the present invention;

FIG. 2 is a schematic view of the internal structure of the assembled shell superheated steam boiler of the present invention;

FIG. 3 is a schematic diagram of the position relationship between the main boiler and the superheater in the present invention;

FIG. 4 is a schematic diagram of the construction of the superheater in the present invention;

FIG. 5 is a view from the direction A of FIG. 4;

FIG. 6 is a partial enlarged view of E in FIG. 5;

FIG. 7 is a view from the direction B of FIG. 4;

FIG. 8 is a schematic structural diagram of the energy saver of the present invention;

fig. 9 is a schematic structural view of a condenser in the present invention;

FIG. 10 is a schematic view of the steam-water separator according to the present invention;

FIG. 11 is a schematic structural view of the first and second shells of the present invention;

FIG. 12 is an expanded view of the present invention with a shell separated;

fig. 13 is a schematic structural view of the middle gap baffle of the present invention;

FIG. 14 is a view in the direction C of FIG. 13;

FIG. 15 is a schematic structural view of the middle steam homogenizing hole plate of the present invention;

FIG. 16 is a view from direction D of FIG. 15;

fig. 17 is a schematic structural view of a wire mesh separator according to the present invention;

wherein,

1-a boiler main machine, 11-a furnace, 12-a combustor, 13-a recombustion chamber, 14-a front tube plate, 15-a rear tube plate, 16-a front smoke chamber, 17-a rear smoke chamber, 18-a two-return tube bundle, 19-a three-return tube bundle, 110-a smoke outlet pipe, 111-a steam outlet pipe and 112-a boiler water inlet;

2-superheater, 21-box, 22-flue gas partition board, 221-flue gas adjusting board, 222-adjusting shaft, 223-adjusting handle, 224-stud, 225-butterfly nut, 226-adjusting cylinder, 227-closing board, 23-horizontal serpentine heat exchange tube, 24-inlet intermediate header, 25-inlet header, 26-outlet intermediate header, 27-outlet header, 28-superheated steam outlet pipe and 29-steel strip;

3-an economizer, 31-an economizer box body, 32-a first vertical type serpentine heat exchange tube, 33-an economizer water inlet and 34-an economizer water outlet;

4-a condenser, 41-a condensation box body, 42-a second vertical type serpentine heat exchange tube, 43-a condenser water inlet and 44-a condenser water outlet;

5-a chimney;

61-separating a shell, 611-through hole, 612-shell steam-homogenizing through hole, 613-shell drain hole; 62-separating a second shell, 621-a gap baffle, 622-a second shell sealing plate, 623-a strip-shaped through hole, 624-a water drainage hole and 625-a water drainage pipe; 63-separating three shells, 631-steam-homogenizing pore plate, 632-three shell steam-homogenizing through hole; 64-wire mesh separator, 641-connecting bump;

→ direction of smoke passage.

Detailed Description

It should be noted that the following detailed description is exemplary and is intended to provide further explanation of the disclosure. Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs.

In the present invention, terms such as "connected" and "connected" should be understood in a broad sense, and may be either fixedly connected or integrally connected or detachably connected; may be directly connected or indirectly connected through an intermediate. The meaning of the above terms in the present invention can be determined according to specific situations by persons skilled in the art, and should not be construed as limiting the present invention.

The present invention will be further explained with reference to the drawings and examples.

Example 1:

as shown in fig. 1-3, an assembled shell superheated steam boiler comprises a boiler main body 1, wherein the boiler main body 1 adopts a shell-type three-pass structure; the top end of a front smoke box of the boiler main machine 1 is provided with a superheater 2;

as shown in fig. 4-7, the superheater 2 comprises a box body 21, and a smoke inlet communicated with the two-pass tube bundle 18 in the boiler main unit 1 is arranged in the middle of the bottom plate of the box body 21; the bottom plates of the box body 21 at the two sides of the smoke inlet are symmetrically provided with smoke baffles 22 extending upwards, and particularly, the front end and the rear end of each smoke baffle 22 are fixedly connected with the front inner side wall and the rear inner side wall of the box body 21; a smoke outlet communicated with the three-return tube bundle 19 in the boiler main machine 1 is formed in a bottom plate of the box body between the smoke partition plate 22 and the corresponding side wall of the box body 21;

a plurality of horizontal serpentine heat exchange tubes 23 are arranged between the two flue gas partition plates 22 along the vertical direction, and the bent parts of the horizontal serpentine heat exchange tubes 23 penetrate through the corresponding flue gas partition plates 22 and are fixedly connected with the corresponding flue gas partition plates 22; the steam inlet end of the horizontal serpentine heat exchange tube 23 is communicated with an inlet intermediate header 24 extending along the vertical direction, the top of the inlet intermediate header 24 is communicated with an inlet header 25, and the inlet header 25 is communicated with a steam outlet pipe 111 of the boiler main body 1; the steam outlet end of the horizontal serpentine heat exchange tube 23 is communicated with an outlet middle header 26 extending along the vertical direction, the top of the outlet middle header 26 is communicated with an outlet header 27, the outlet header 27 is communicated with a superheated steam outlet pipe 28, and a superheater instrument header is arranged on the superheated steam outlet pipe 28.

Specifically, steam generated by the boiler main machine 1 enters each horizontal serpentine heat exchange tube 23 through the inlet header 25 and the inlet intermediate header 24, exchanges heat with flue gas entering the box body 21 through the two-pass tube bundle 18 of the boiler main machine 1, so that the steam is heated to superheated steam, and is finally conveyed to a user for use through the outlet end of each horizontal serpentine heat exchange tube 23, the outlet intermediate header 26, the outlet header 27 and the superheated steam outlet tube 28, wherein the boiler can provide superheated steam at 260 ℃ for the user; the flue gas entering the box body 21 from the bottom flue gas inlet is flushed with the horizontal serpentine heat exchange tube 23 upwards, then the flue gas passes through the flue gas partition plate 22 upwards and then is flushed with the horizontal serpentine heat exchange tube 23 downwards, and finally the flue gas returns to the three-pass tube bundle 19 of the boiler main machine 1 through the flue gas outlet.

Preferably, a steel belt 29 is spirally wound on the horizontal serpentine heat exchange tube 23 between the two flue gas baffles 22 to increase the heating surface and improve the heat transfer efficiency.

Preferably, as shown in fig. 5-6, a rectangular flue gas adjusting opening is formed in the middle of the lower end of the flue gas partition plate 22, a flue gas adjusting plate 221 is arranged in the rectangular flue gas adjusting opening, and the size of the flue gas adjusting plate 221 is adapted to the size of the rectangular flue gas adjusting opening;

the middle part of one side of the smoke adjusting plate 221 is fixedly provided with an adjusting shaft 222 extending along the width direction of the smoke baffle plate 22;

one end of the adjusting shaft 222 penetrates through the corresponding side wall of the box body 21 and is rotatably connected with the corresponding side wall of the box body 21; an adjusting handle 223 is vertically and fixedly arranged at one end of the adjusting shaft 222, which penetrates through the side wall of the box body 21, a stud 224 is vertically and outwardly arranged at the end part of the adjusting handle 223, and a butterfly nut 225 is arranged on the stud 224;

an adjusting cylinder 226 is arranged at the outer end of the side wall of the box body 21 corresponding to the adjusting handle 223, and a sealing plate 227 is arranged at the outer end of the adjusting cylinder 226; the closing plate 227 is provided with an annular track for the stud 224 to pass through.

The stud 224 is rotated along the annular track, so that the smoke adjusting plate 221 is rotated, and a part of smoke coming from the two-return tube bundle 18 in the boiler main unit 1 directly returns to the three-return tube bundle 19 in the boiler main unit 1 along a gap between the smoke adjusting plate 221 and the smoke baffle plate 22 without participating in the heat exchange process with steam in the horizontal serpentine heat exchange tube 23 in the superheater 2; namely, the actual smoke quantity entering the superheater 2 for heat exchange with steam is controlled through the rotation of the smoke regulating plate 221, and the temperature of the superheated steam at the outlet of the superheater 2 is further regulated; wherein, through the different turned angle of adjusting cigarette board 221, realize the regulation of cigarette volume, and then realize the regulation of the different superheated steam temperature in superheater 2 export.

After the rotation angle of the smoke adjusting plate 221 is adjusted by rotating the stud 224, the butterfly nut 225 is tightly pressed on the outer end face of the sealing plate 227 by screwing the butterfly nut 225, so that the smoke adjusting plate 221 is positioned.

Meanwhile, the smoke adjusting plates 221 on the two smoke baffle plates 22 can realize independent control.

Preferably, the bottom plate of the box body 21 is detachably connected with the boiler main body 1 through bolts, so that the superheater 2 and the boiler main body 1 can be transported separately.

Example 2:

on the basis of the embodiment 1, the rear end of the flue gas outlet pipe 110 of the boiler main unit 1 is sequentially provided with an economizer 3 and a condenser 4;

as shown in fig. 8, the economizer 3 comprises an economizer tank 31, and a bottom flue gas inlet of the economizer tank 31 is communicated with a flue gas outlet pipe 110 of the boiler main body 1; a plurality of rows of first vertical type serpentine heat exchange tubes 32 are arranged in the economizer 3; the top inlet end of the first vertical serpentine heat exchange tube 32 is connected with the water inlet 33 of the economizer, and the bottom outlet end of the first vertical serpentine heat exchange tube 32 is connected with the water outlet 34 of the economizer;

as shown in fig. 9, the condenser 4 includes a condensing box 41, and a bottom flue gas inlet of the condensing box 41 is communicated with a top flue gas outlet of the economizer 3; a plurality of rows of second vertical type serpentine heat exchange tubes 42 are arranged in the condenser 4; the top inlet end of the second vertical serpentine heat exchange tube 42 is connected with a condenser water inlet 43, and the bottom outlet end of the second vertical serpentine heat exchange tube 42 is connected with a condenser water outlet 44;

and a chimney 5 is arranged at a top smoke outlet of the condenser 4.

In the application, the energy saver 3 and the condenser 4 form a two-stage energy saving device, and the final exhaust temperature can be reduced to below 60 ℃ through heat exchange between the flue gas and water, so that the heat efficiency is high.

Preferably, the steel strip 29 is spirally wound on each of the straight tube section of the first vertical serpentine heat exchange tube 32 and the straight tube section of the second vertical serpentine heat exchange tube 42, so as to increase the heating surface and improve the heat transfer efficiency.

Wherein, first vertical snakelike heat exchange tube 32, the snakelike heat exchange tube 42 of second vertical all adopt ND steel material, can effectively prevent the sulphur and corrode, improve the life of economizer 3 and condenser 4.

Example 3:

in addition to embodiment 2, as shown in fig. 2, a furnace 11 is provided in the boiler main body 1, a burner 12 is provided at the front end of the furnace 11, and a flashback chamber 13 is provided at the rear end of the furnace 11;

the front end and the rear end of the boiler main machine 1 are respectively provided with a front tube plate 14 and a rear tube plate 15; the front tube plate 14 and a front smoke box of the boiler main machine 1 form a front smoke chamber 16, and the rear tube plate 15 and a rear smoke box of the boiler main machine 1 form a rear smoke chamber 17;

a two-pass tube bundle 18 and a three-pass tube bundle 19 which are arranged layer by layer are arranged above the furnace pipe 11;

the inlet of the two return tube bundles 18 is communicated with the back combustion chamber 13, the outlet of the two return tube bundles 18 is communicated with the front smoke chamber 16, and the front smoke chamber 16 is communicated with the bottom smoke inlet of the superheater box body 21;

the inlet of the three-return tube bundle 19 is communicated with the smoke outlet at the bottom of the superheater box body 21, the outlet of the three-return tube bundle 19 is communicated with the rear smoke chamber 17, and the rear smoke chamber 17 is communicated with the smoke outlet pipe 110 of the boiler main machine 1;

the boiler water inlet 112 of the boiler main machine 1 is communicated with the economizer water outlet 34 of the economizer 3; namely, the economizer 3 heats water by utilizing the waste heat of the flue gas of the boiler main machine 1, and conveys the heated water into the boiler main machine 1, so that the waste heat of the flue gas is fully utilized, and the heat efficiency is improved.

Wherein, the steam outlet pipe 111 of the boiler main body 1 is communicated with the inlet header 25 of the superheater 2.

Example 4:

on the basis of the embodiment 1, the embodiment 2 or the embodiment 3, a steam-water separator is arranged at the front end of the steam outlet pipe 111 in the boiler main unit 1;

as shown in fig. 10, the steam-water separator includes a first separation shell 61 and a second separation shell 62;

as shown in fig. 11-12, the first separation shell 61 is a tubular structure with two ends being sealed and arranged transversely, and the upper part of the side wall of the first separation shell 61 is provided with a through hole 611 for connecting with the bottom end of the steam outlet pipe 111 in the main boiler 1; a plurality of first-shell steam-homogenizing through holes 612 are formed in the upper part of the side wall of the first separating shell 61 on the two sides of the through hole 611; a plurality of first-shell drain holes 613 are formed in the lower portion of the sidewall of the first separation shell 61 along the length direction;

the separation two shell 62 is positioned outside the separation one shell 61; the separating second shell 62 comprises two slit baffles 621 which extend along the length direction of the separating first shell 61 and are symmetrically arranged, and the bottoms of the two slit baffles 621 are fixedly connected; two ends of the two gap baffles 621 are fixedly provided with two shell seal plates 622; the top parts of the gap baffle 621 and the two-shell sealing plate 622 are fixedly connected with the inner wall of the boiler main body 1;

as shown in fig. 13-14, the lower portion of the slit baffle 621 is bent inward to facilitate the separated water to slide down to the drain pipe 625; a plurality of strip-shaped through holes 623 are formed in the upper part of the vertical section at the upper end of the gap baffle 621; the bottom of the second separating shell 62 is provided with a plurality of drain pipes 625;

the three separating shells 63 are symmetrically arranged outside the gap baffles 621 on the two sides of the two separating shells 62;

the separation three-shell 63 comprises a steam-homogenizing hole plate 631, the upper end and the lower end of the steam-homogenizing hole plate 631 are both in a bent structure, and specifically, the upper end and the lower end of the steam-homogenizing hole plate 631 are both in an obtuse-angle bent structure; two ends of the steam homogenizing hole plate 631 are fixedly provided with three shell seal plates; the upper end and the lower end of the steam equalizing hole plate 631 and the end of the three-shell sealing plate are fixedly connected with the outer end face of the vertical end at the upper part of the corresponding slit baffle 621;

as shown in fig. 15-16, a plurality of three-shell steam-homogenizing through holes 632 are uniformly arranged on the middle vertical section of the steam-homogenizing hole plate 631;

a plurality of drain holes 624 are arranged at the lower part of the vertical section at the upper end of the gap baffle 621;

the strip-shaped through hole 623 and the drain hole 624 on the slit baffle 621 are positioned between the upper end and the lower end of the corresponding steam-homogenizing hole plate 631;

even vapour orifice plate 631's setting in this application plays certain separation effect on the one hand, and on the other hand still plays the effect that makes the even entering wire net separator 64 of steam, avoids steam to get into inhomogeneous and leads to the separation effect not good.

And a steel wire mesh separator 64 is arranged on the inner side of the three separation shells 63.

Preferably, the steel wire mesh separator 64 includes a plurality of layers of compressed steel wire meshes, specifically, the plurality of layers of steel wire meshes are compressed by bolts and nuts.

Preferably, the wire mesh separator 64 comprises 4 or 5 layers of compacted wire mesh.

Preferably, the vertical section at the upper end of the gap baffle 621, the steel wire mesh and the middle vertical section of the steam-homogenizing hole plate 631 are arranged in parallel.

Preferably, as shown in fig. 17, a plurality of connecting bumps 641 are symmetrically disposed at the upper and lower ends of the steel wire mesh separator 64; the outer end of the connecting bump 641 is fixedly connected with the inner side of the corresponding bending section of the steam homogenizing hole plate 631.

After the steel wire mesh separator 64 is installed, a gap is formed between the adjacent connecting convex blocks 641 and the inner side of the bent section of the steam uniform hole plate 631, and water separated by the steam uniform hole plate 631 slides along the inner wall, passes through the gap and then enters the inside of the separation second shell 62 through the water drainage hole 624.

In example 4, the three-stage separation device 63, the wire mesh separator 64, the two-stage separation device 62 and the one-stage separation device 61 is formed;

wet saturated steam in the boiler main machine 1 enters the separation three-shell 63 along the three-shell steam-homogenizing through holes 632 on the two-side steam-homogenizing hole plates 631 to realize first-stage separation;

the steam after the first-stage separation passes through the steel wire mesh separator 64 to realize second-stage separation;

the steam after the second-stage separation enters the separation second shell 62 through the strip-shaped through holes 623 on the slit baffles 621 on the two sides to realize the third-stage separation;

the steam after the third-stage separation enters the first separation shell 61 through the first shell steam-homogenizing through hole 612 on the first separation shell 61 to realize the fourth-stage separation, and the steam after the fourth-stage separation is discharged through the steam outlet pipe 111 of the boiler main machine 1;

the water separated in the first stage slides down along the inner wall surface of the third separating shell 63, passes through a gap formed between adjacent connecting bumps 641 and the inner side of the bent section of the steam homogenizing hole plate 631, enters the second separating shell 62 through the water drainage hole 624, and is finally discharged through the water drainage pipe 625;

the water separated in the second stage slides along the inner wall surface of the separation third shell 63, enters the separation second shell 62 through the drainage hole 624, and is finally discharged through the drainage pipe 625;

the water separated in the third stage slides down along the inner wall of the slit baffle 621 to the drain pipe 625 to be discharged;

the water separated at the fourth stage falls to the bottom of the second separation shell 62 through the first shell drain hole 613 of the first separation shell 61 and is drained through the drain pipe 625.

The level four separation setting of catch water 6 in this application can be with the humidity control of saturated steam within 1%, has improved the steam quality that gets into the over heater greatly.

Although the present invention has been described with reference to the accompanying drawings, it is not intended to limit the present invention, and those skilled in the art should understand that, based on the technical solution of the present invention, various modifications or variations that can be made by those skilled in the art without inventive labor are still within the scope of the present invention.

Claims

1. An assembled shell superheated steam boiler comprises a boiler main machine, wherein the boiler main machine adopts a shell type three-pass structure; the boiler is characterized in that a superheater is arranged at the top end of a front smoke box of the boiler main machine;

2. An assembled shell superheated steam boiler according to claim 1, wherein the horizontal serpentine heat exchange tubes between the two flue gas baffles are spirally wound with steel strips.

3. The assembled shell superheated steam boiler as claimed in claim 1, wherein the lower middle part of the flue gas partition plate is provided with a rectangular flue gas adjusting opening, and a flue gas adjusting plate is arranged in the rectangular flue gas adjusting opening;

4. An assembled shell superheated steam boiler as claimed in claim 1 wherein the bottom plate of the box is detachably connected to the boiler main body by bolts.

5. An assembled shell superheated steam boiler as claimed in claim 1, wherein an economizer and a condenser are sequentially provided at the rear end of the flue gas outlet pipe of the main boiler;

and a chimney is arranged at a top smoke outlet of the condenser.

6. The assembled shell-superheated steam boiler as claimed in claim 5, wherein the straight tube sections of the first vertical serpentine heat exchange tubes and the straight tube sections of the second vertical serpentine heat exchange tubes are spirally wound with steel strips.

7. An assembled shell superheated steam boiler as claimed in claim 5, wherein a furnace is arranged in the boiler main body, a burner is arranged at the front end of the furnace, and a back-burning chamber is arranged at the back end of the furnace;

8. An assembled shell superheated steam boiler according to claim 7, wherein a steam-water separator is provided at the front end of the steam outlet pipe in the main boiler body;

9. An assembled shell superheated steam boiler according to claim 8, wherein the wire mesh separator comprises a plurality of layers of compacted wire mesh.

10. An assembled shell superheated steam boiler according to claim 9, wherein the wire mesh separator comprises 4 or 5 layers of compacted wire mesh.