CN214891297U

CN214891297U - Boiler tail gas waste heat recovery device

Info

Publication number: CN214891297U
Application number: CN202022953370.0U
Authority: CN
Inventors: 祝勇军; 周平; 陈继科; 李兵; 赵小喜; 汪建平
Original assignee: Sichuan Desheng Group Vanadium Titanium Co Ltd
Current assignee: Sichuan Desheng Group Vanadium Titanium Co Ltd
Priority date: 2020-12-11
Filing date: 2020-12-11
Publication date: 2021-11-26
Anticipated expiration: 2030-12-11

Abstract

The embodiment of the utility model discloses a boiler tail gas waste heat recovery device, which comprises a chimney and a heat exchange tube, wherein the heat exchange tube is vertically arranged in the chimney along the flowing direction of gas in the chimney, the bottom of the chimney is provided with a tail gas inlet, and the tail gas inlet is aligned with a pipeline at the end part of the inlet end of the heat exchange tube; when the chimney is used, high-temperature gas in the chimney can exchange heat with a medium needing heat exchange in the heat exchange pipe, and meanwhile, the heating effect on the medium is further improved through the fact that the flowing direction of the medium is the same as the flowing direction of the gas in the chimney, so that waste of heat of the gas exhausted from the chimney is reduced.

Description

Boiler tail gas waste heat recovery device

Technical Field

The utility model relates to a boiler air feeder especially relates to a boiler tail gas waste heat recovery device.

Background

At present, gas generated by combustion of most of domestic steam boilers is discharged through a chimney when the steam boilers are used, but the gas after combustion often generates a large amount of heat, and if the gas is directly discharged into the atmosphere, a large amount of heat energy is wasted.

SUMMERY OF THE UTILITY MODEL

For solving the technical problem, the embodiment of the utility model provides a boiler tail gas waste heat recovery device can heat the heat exchange pipe through the gas that discharges after the burning through setting up the heat exchange pipe in the chimney for the heat energy of boiler burning is collected, has avoided gaseous direct discharge to the heat energy waste that causes in the air.

In order to achieve the above purpose, the embodiment of the present invention provides a technical solution that:

the embodiment of the utility model provides a boiler tail gas waste heat recovery device, including chimney and heat exchange tube, the heat exchange tube is along the gas flow's in the chimney direction vertical setting in the chimney, and the direction that the heat exchange medium flows in the heat exchange tube (2) is unanimous with the gas flow's in the chimney (1) direction; and a tail gas inlet is formed in the bottom of the chimney, and the tail gas inlet is aligned with a pipeline at the end part of the inlet end of the heat exchange tube.

In the embodiment of the utility model provides an in, tail gas import department sets up and is used for gaseous direction the guide plate of heat exchange tube.

The embodiment of the utility model provides an in, the top of chimney sets up the tail gas export, the heat exchange tube passes the tail gas export is connected with water equipment.

In the embodiment of the utility model, a spray head is arranged along the inner wall of the edge of the chimney tail gas outlet, and the spray head is connected with the spray water pipe of the heat exchange pipe;

and a waste water recovery port is also arranged at the bottom end of the chimney.

The embodiment of the utility model provides an in, follow circumference sets up annular smoke baffle on the marginal inner wall in chimney tail gas exit, smoke baffle sets up the below of shower nozzle.

In the embodiment of the present invention, the smoke baffle is disposed by inclining upwards from the outside to the inside of the chimney, and the surface of the smoke baffle is provided with the thermal insulation layer.

The embodiment of the utility model provides a boiler tail gas waste heat recovery device, including chimney and heat exchange tube, the heat exchange tube is along the vertical setting of the direction of gas flow in the chimney, the bottom of chimney is seted up the tail gas import, the tail gas import with the pipeline alignment setting of heat exchange tube entry end tip; when the chimney is used, high-temperature gas in the chimney can exchange heat with a medium needing heat exchange in the heat exchange pipe, and meanwhile, the heating effect on the medium is further improved through the fact that the flowing direction of the medium is the same as the flowing direction of the gas in the chimney, so that waste of heat of the gas exhausted from the chimney is reduced.

Drawings

Fig. 1 is a schematic structural diagram of a boiler tail gas waste heat recovery device provided by an embodiment of the present invention;

fig. 2 is a schematic structural diagram of another boiler tail gas waste heat recovery device provided by the embodiment of the present invention.

Detailed Description

The technical solution in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention.

The embodiment of the utility model provides a boiler tail gas waste heat recovery device, as shown in fig. 1 and 2, including chimney 1 and heat exchange tube 2, heat exchange tube 2 follows the vertical setting of the direction of gaseous flow is in the chimney 1, tail gas import 11 is seted up to the bottom of chimney 1, tail gas import 11 with the pipeline alignment setting of heat exchange tube 2 entry end tip.

Here, chimney 1 is used for discharging the gas that produces when the boiler burns, chimney 1 vertical setting, just chimney 1's bottom sets up tail gas import 11, and tail gas export 12 is seted up to the top, and the gas that the boiler's furnace intracavity was burnt produces enters into through tail gas import 11 in chimney 1, then discharge through tail gas export 12, heat exchange tube 2 is the metal pipeline that the heat conductivility is good, and when using, heat exchange tube 2 vertical setting is in chimney 1, just the direction that the heat transfer medium flows in heat exchange tube 2 is in the direction that gas flows in chimney 1 is unanimous. Meanwhile, the tail gas inlet 11 is aligned with the pipeline at the end part of the inlet end of the heat exchange tube 2, so that the contact time of the flue gas with a heat exchange medium can be prolonged while the flue gas flows, and the heat exchange effect is improved. The medium after heat exchange can be connected with a water using device, wherein the medium can be water, and the water using device can be a boiler. Here, a clamping groove is formed in the outer wall of the chimney 1, and the heat exchange tube 2 located outside the chimney 1 is clamped in the clamping groove and connected with the water utilization equipment, so that the installation stability of the heat exchange tube 2 can be further improved.

Further, in the embodiment of the present invention, the tail gas inlet 11 is provided with a guide plate 3 for guiding gas to the heat exchange tube 2.

Here, in order to further improve the utilization ratio of gas heat, so tail gas import 11 department sets up and is used for gaseous direction the guide plate 3 of heat exchange tube 2, guide plate 3 has two, is the splayed setting, and wherein, the osculum department that two guide plates 3 that are the splayed setting formed connects tail gas import 11, and the macrostoma department that two guide plates 3 that are the splayed setting formed sets up heat exchange tube 2. Thus, the gas can be more concentrated at the heat exchange tube 2, and the heat exchange effect is improved.

Further, in the embodiment of the present invention, a nozzle 4 is disposed along the inner wall of the edge of the chimney 1 at the tail gas outlet 12, and the nozzle 4 is connected to the spray water pipe 21 of the heat exchange pipe 2; and a waste water recovery port 13 is also arranged at the bottom end of the chimney 1.

An annular smoke baffle 5 is circumferentially arranged on the inner wall of the edge of the tail gas outlet 12 of the chimney 1, and the smoke baffle 5 is arranged below the spray head 4.

The smoke baffle 5 is arranged from the outside to the inside of the chimney 1 in an upward inclined mode, and a heat insulation layer is arranged on the surface of the smoke baffle 5.

Here, the gas burned by the boiler may contain some dust impurities, which may cause atmospheric pollution if the gas is directly discharged. Therefore, the spray head 4 is arranged on the inner wall of the edge at the tail gas outlet 12 of the chimney 1, and the spray head 4 can spray water into the chimney 1. Specifically, the heat exchange tube 2 comprises a main water tube and a spray water tube 21, the main water tube is connected with water utilization equipment, and the spray water tube 21 is connected with the spray head 4. The bottom end of the chimney 1 is also provided with a waste water recovery port 13, and the waste water recovery port 13 is used for recovering spray water for spraying.

In order to avoid the influence of the heat in the gas on the spray head 4, the smoke baffle 5 is arranged right below the spray head 4, and the smoke baffle 5 is an annular plate. In particular, the fume baffle 5 is inclined upwardly from the exterior to the interior of the chimney 1, such that, in use, gas is directed by the fume baffle 5, thereby reducing the impact on the showerhead 4. Meanwhile, the spray head 4 can also spray water onto the smoke baffle 5, and the water overflows the smoke baffle 5 to perform spraying treatment on the interior of the chimney 1.

Furthermore, in order to prolong the service life of the smoke barrier 5, a thermal insulation layer is arranged on the surface of the smoke barrier 5, so that the smoke barrier 5 is prevented from being influenced by the gas with heat.

The above is only a preferred embodiment of the present invention, and it should be noted that the above preferred embodiment should not be considered as limiting the present invention, and the protection scope of the present invention should be subject to the scope defined by the claims. It will be apparent to those skilled in the art that various modifications and enhancements can be made without departing from the spirit and scope of the invention, and such modifications and enhancements are intended to be within the scope of the invention.

Claims

1. The boiler tail gas waste heat recovery device is characterized by comprising a chimney (1) and a heat exchange pipe (2), wherein the heat exchange pipe (2) is vertically arranged in the chimney (1) along the flowing direction of gas in the chimney (1), and the flowing direction of a heat exchange medium in the heat exchange pipe (2) is consistent with the flowing direction of the gas in the chimney (1); and a tail gas inlet (11) is formed in the bottom of the chimney (1), and the tail gas inlet (11) is aligned with a pipeline at the end part of the inlet end of the heat exchange tube (2).

2. The boiler tail gas waste heat recovery device according to claim 1, characterized in that a flow guide plate (3) for guiding gas to the heat exchange tube (2) is arranged at the tail gas inlet (11).

3. The boiler tail gas waste heat recovery device according to claim 1, characterized in that a tail gas outlet (12) is arranged at the top end of the chimney (1), and the heat exchange tube (2) passes through the tail gas outlet (12) and is connected with a water using device.

4. The boiler tail gas waste heat recovery device according to claim 3, characterized in that a spray head (4) is arranged along the inner wall of the edge of the chimney (1) at the tail gas outlet (12), and the spray head (4) is connected with a spray water pipe (21) of the heat exchange pipe (2);

and a waste water recovery port (13) is also arranged at the bottom end of the chimney (1).

5. The boiler tail gas waste heat recovery device according to claim 4, characterized in that an annular smoke baffle (5) is circumferentially arranged on the inner wall of the edge at the tail gas outlet (12) of the chimney (1), and the smoke baffle (5) is arranged below the spray nozzle (4).

6. The boiler tail gas waste heat recovery device according to claim 5, characterized in that the smoke baffle (5) is arranged to incline upwards from the outside to the inside of the chimney (1), and the surface of the smoke baffle (5) is provided with a heat insulation layer.