CN218846097U - Integrated waste heat recovery device - Google Patents

Abstract

The utility model discloses an integral type waste heat recovery device relates to waste heat recovery technical field. This integral type waste heat recovery device for the heat transfer of flue gas and water, waste heat recovery device is surface heat exchanger, including flue gas side and water side, the flue gas side includes the heat exchange tube, the water side includes outer barrel, the heat exchange tube sets up at the urceolus internally, the top of heat exchange tube is connected with the expansion joint through last awl section of thick bamboo, the upper end of expansion joint is connected with the tube side export and takes over, be provided with catch water between the top of going up the awl section of thick bamboo and the outer barrel, outer barrel includes heating section and evaporation zone, the evaporation zone sets up in the heating section top. This integral type waste heat recovery device carries out the integral type design through the integrated design with catch water and waste heat recoverer and with heating section and evaporation zone, can effectively reduce the consumption of panel and tubular product, has also improved the thermal efficiency in addition.

Description

Integrated waste heat recovery device

Technical Field

The utility model relates to a waste heat recovery technical field specifically is an integral type waste heat recovery device.

Background

The waste heat recovery device is a core device in the production of a fluidized bed gasification system, and bears the important task of reducing the temperature of flue gas to realize heat exchange, whether the device can safely and stably operate or not is directly related to whether the whole gasification system can safely and stably operate or not, the traditional waste heat recovery device is in a structure that a waste heat recoverer and a steam-water separator are separated, the steam-water separator is positioned on an upper layer platform of the waste heat recoverer, the waste heat recoverer and the steam-water separator are connected through a rising pipe and a falling pipe, a large amount of plates and pipes are consumed in the mode, and the loss is large in the heat exchange process.

SUMMERY OF THE UTILITY MODEL

Technical problem to be solved

Not enough to prior art, the utility model provides an integral type waste heat recovery device has solved following technical problem:

1. the waste heat recoverer and the steam-water separator of the existing waste heat recovery device are of a split structure, the steam-water separator is positioned on an upper layer of platform of the waste heat recoverer, and the waste heat recoverer and the steam-water separator are connected through a rising pipe and a down pipe, so that a large amount of plates and pipes are consumed, and the loss is large in the heat exchange process;

2. the existing integrated waste heat recovery device has the problems that because the evaporation section and the heating section are designed in an integrated manner, the thermal stress of tube pass expansion cannot be eliminated;

3. the shell pass bottom of the existing integrated waste heat recovery device adopts a plane plugging structure, so that the axial temperature difference load of a tube plate cannot be reduced;

4. the liquid level measurement height of the existing integrated waste heat recovery device does not span a steam-water separator and cannot adapt to the up-and-down floating of the water level.

(II) technical scheme

In order to achieve the above purpose, the utility model discloses a following technical scheme realizes: the utility model provides an integral type waste heat recovery device for the heat transfer of flue gas and water, waste heat recovery device is surface formula heat exchanger, including flue gas side and water side, the flue gas side includes the heat exchange tube, the water side includes outer barrel, the heat exchange tube sets up in outer barrel, the top of heat exchange tube is connected with the expansion joint through last awl section of thick bamboo, the upper end of expansion joint is connected with tube side export takeover, be provided with catch water between the top of last awl section of thick bamboo and the outer barrel, outer barrel includes heating section and evaporation zone, the evaporation zone sets up in the heating section top, the top of outer barrel is provided with steam outlet, the side of bottom is provided with shell side entry, the lower extreme of outer barrel is provided with the arc head, the lower extreme of heat exchange tube extends to the below of arc head after passing the arc head, the bottom of outer barrel is connected with straight down, straight tube cover is established outside the arc head down, the bottom of straight down is connected with the tube side entry, the side of outer barrel upper end of outer barrel is provided with the double-tube level gauge, the upper joint of double-tube level gauge is connected with the catch water below the barrel.

Preferably, a baffle plate is arranged in the water side.

Preferably, the lower extreme of heat exchange tube is connected with the pillar subassembly, the pillar subassembly is used for protecting the lower extreme of heat exchange tube, prevents that the lower extreme of heat exchange tube from being blown by the flue gas and decreases.

Preferably, the steam-water separator is a silk stocking demister.

Preferably, the top of the heat exchange tube is sleeved with an upper tube plate.

(III) advantageous effects

The utility model provides an integral type waste heat recovery device. The method has the following beneficial effects:

(1) This integral type waste heat recovery device carries out the integral type design through the integrated design with catch water and waste heat recoverer and with heating section and evaporation zone, can effectively reduce the consumption of panel and tubular product, has also improved the thermal efficiency in addition.

(2) The integrated waste heat recovery device can eliminate the thermal stress of tube pass expansion in a mode of arranging the expansion joint at the tube pass outlet.

(3) The shell pass bottom of the integrated waste heat recovery device adopts the flexible seal head to replace a traditional fixed lower tube plate for the lower tube plate, so that the axial temperature difference load and stress of the tube plate can be effectively reduced, the thermal expansion between the shell and the tube bundle can be compensated, and in addition, because the outer barrel body cancels an expansion joint, the thermal expansion of the shell and the tube pass is compensated.

(4) The integrated waste heat recovery device has the advantages that the water separator is highly crossed in the liquid level measurement, the water level can be effectively adapted to the up-and-down floating, and therefore the water level state of the water separator can be more effectively observed.

Drawings

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

In the figure: 1. a lower cone; 2. a lower straight cylinder; 3. a shroud assembly; 4. an arc-shaped end enclosure; 5. a shell-side inlet; 6. a baffle plate; 7. a heat exchange pipe; 8. an outer cylinder; 9. an upper tube sheet; 10. an upper conical cylinder; 11. a steam-water separator; 12. an expansion joint; 13. a tube pass outlet connection tube; 14. a steam outlet; 15. a double tube level gauge; 16. a tube side inlet.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

Referring to fig. 1, the present invention provides a technical solution: an integrated waste heat recovery device is used for heat exchange of flue gas and water, the waste heat recovery device is a surface heat exchanger and comprises a flue gas side and a water side, the flue gas side comprises a heat exchange tube 7, the water side comprises an outer cylinder 8, and the heat exchange tube 7 is arranged in the outer cylinder 8;

in order to fix the heat exchange tube 7 conveniently, the top of the heat exchange tube 7 is sleeved with an upper tube plate 9;

in order to eliminate the thermal stress of tube side expansion, the top of the heat exchange tube 7 is connected with an expansion joint 12 through an upper conical cylinder 10, and the upper end of the expansion joint 12 is connected with a tube side outlet connecting tube 13;

in order to reduce the consumption of plates and pipes and improve the thermal efficiency of the waste heat exchanger, a steam-water separator 11 is arranged between the top of the upper conical cylinder 10 and the outer cylinder 8, the outer cylinder 8 comprises a heating section and an evaporation section, and the steam-water separator 11 can be a silk stocking demister;

the evaporation section is arranged above the heating section, the top of the outer cylinder 8 is provided with a steam outlet 14, and the side surface of the bottom is provided with a shell pass inlet 5;

in order to effectively reduce the axial temperature difference load and stress of the tube plate, the lower end of the outer cylinder body 8 is provided with an arc-shaped end enclosure 4, the lower end of the heat exchange tube 7 penetrates through the arc-shaped end enclosure 4 and then extends to the position below the arc-shaped end enclosure 4, the bottom of the outer cylinder body 8 is connected with a lower straight cylinder 2, and the lower straight cylinder 2 is sleeved outside the arc-shaped end enclosure 4;

the bottom of the lower straight cylinder 2 is connected with a tube pass inlet 16, and the side surface of the upper end of the outer cylinder 8 is provided with a double-tube liquid level meter 15;

in order to effectively detect the up-and-down floating of the water level of the steam-water separator, the upper joint of the double-pipe type liquid level meter 15 is connected with the outer barrel 8 above the steam-water separator 11, and the lower joint of the double-pipe type liquid level meter 15 is connected with the outer barrel 8 below the steam-water separator 11. In addition, the double-tube type liquid level meter 15 can be matched with a transmitter and a DCS system to realize remote monitoring.

In order to prevent the bottom of the heat exchange tube 7 from being blown by smoke, the lower end of the heat exchange tube 7 is connected with a protective tube component 3, and the protective tube component 3 is used for protecting the lower end of the heat exchange tube 7 and preventing the lower end of the heat exchange tube 7 from being blown by smoke. The arrangement of the tube protecting component 3 is equivalent to that a tube is sleeved at the tail end of the heat exchange tube positioned at the lower tube plate, the tube is connected with the heat exchange tube through a fiber cord, the purpose is to facilitate the tube replacement after being worn, and the main purpose of the tube protecting component is to wear the outer tube so as to achieve the purpose of protecting the heat exchange tube.

In order to improve the heat transfer effect of water in the shell side, a baffle plate 6 is arranged in the water side.

The working principle is as follows:

the flue gas passes through the heat exchange tube 7, passes through the upper tube plate 9 and the upper cone 10, is discharged through the tube pass outlet connecting tube 13, enters the next step of heat exchange, and the tube pass outlet connecting tube 13 is provided with an expansion joint 12. The shell side inlet 5 is arranged at the lower right of the outer cylinder, cold water enters the device through the shell side inlet 5 at the lower right of the outer cylinder and flows through the baffle plate 6 until the heat exchange tube 7 is submerged, the double-tube type liquid level meter 15 is arranged at the upper end part of the cylinder, the steam-water separator 11 is arranged at the top end of the waste heat recovery device, and steam is discharged through the steam outlet 14 after passing through the steam-liquid separator in the steam-water separator 11.

It should be noted that, in the description of the present invention, the terms "upper", "lower", "left", "right", "front", "back", etc. indicate the orientation or position relationship of the structure of the present invention based on the drawings, and are only for the convenience of describing the present invention, but do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention.

The terms "first" and "second" in the present technical solution are only used to distinguish the same or similar structures or the corresponding structures having similar functions, and are not the arrangement of the importance of the structures, nor are they the order, or comparison of the sizes, or other meanings.

In addition, unless expressly stated or limited otherwise, the terms "mounted" and "connected" are to be construed broadly, e.g., the connection may be a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; the two structures can be directly connected or indirectly connected through an intermediate medium, and the two structures can be communicated with each other. To those skilled in the art, the specific meaning of the above terms in the present invention can be understood in relation to the present context, according to the general idea of the present invention.

Claims (5)

1. The utility model provides an integral type waste heat recovery device for the heat transfer of flue gas and water, waste heat recovery device is surface heat exchanger, including flue gas side and water side, the flue gas side includes heat exchange tube (7), the water side includes outer barrel (8), heat exchange tube (7) set up in outer barrel (8), its characterized in that: the top of heat exchange tube (7) is connected with expansion joint (12) through last awl section of thick bamboo (10), the upper end of expansion joint (12) is connected with tube side export takeover (13), be provided with catch water (11) between the top of last awl section of thick bamboo (10) and outer barrel (8), outer barrel (8) are including heating section and evaporation zone, the evaporation zone sets up in the heating section top, the side that the top of outer barrel (8) was provided with steam outlet (14), bottom is provided with shell side entry (5), the lower extreme of outer barrel (8) is provided with arc head (4), the lower extreme of heat exchange tube (7) passes behind arc head (4) and extends to the below of arc head (4), the bottom of outer barrel (8) is connected with down straight section of thick bamboo (2), the bottom of lower straight section of thick bamboo (2) is connected with tube side entry (16), outer barrel (8) side is provided with double-tube level gauge (15), the upper end and the cover of double-tube gauge (15) and catch water (11) below are established the barrel (11) are connected with catch water (11) and outer barrel (11).

2. The integrated waste heat recovery device of claim 1, wherein: a baffle plate (6) is arranged in the water side.

3. The integrated waste heat recovery device of claim 1, wherein: the lower extreme of heat exchange tube (7) is connected with pillar subassembly (3), pillar subassembly (3) are used for protecting the lower extreme of heat exchange tube (7), prevent that the lower extreme of heat exchange tube (7) from being blown by the flue gas and decrease.

4. The integrated waste heat recovery device of claim 1, wherein: the steam-water separator (11) is a silk stocking demister.

5. The integrated waste heat recovery device of claim 1, wherein: the top of the heat exchange tube (7) is sleeved with an upper tube plate (9).

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