CN219222832U

CN219222832U - Boiler flue gas waste heat recovery device

Info

Publication number: CN219222832U
Application number: CN202223477521.5U
Authority: CN
Inventors: 王武; 李鉴能
Original assignee: Zhaoqing Enn Clean Energy Co ltd
Current assignee: Zhaoqing Enn Clean Energy Co ltd
Priority date: 2022-12-26
Filing date: 2022-12-26
Publication date: 2023-06-20
Anticipated expiration: 2032-12-26

Abstract

The utility model relates to a boiler flue gas waste heat recovery device, which comprises a boiler, wherein an energy saver is arranged on the upper side of the boiler, a water supply header pipe is respectively communicated with an energy saver water supply pipe and a spray water supply pipe, one end of the energy saver water supply pipe, which is far away from the water supply header pipe, penetrates through the energy saver and is communicated with the boiler, the energy saver water supply pipe is a multi-ring pipeline in the energy saver, the spray water supply pipe is communicated with the energy saver, the bottom of the energy saver is also provided with a sewage outlet, the annular design of the energy saver water supply pipe is convenient for transmitting heat through the annular pipe, the heat exchange heating surface is increased, and the inside and outside of the annular pipe are subjected to full heat exchange; through spraying the atomizing of water supply pipe, adsorb the dirt impurity in the flue gas, then discharge through the drain, spray the effect that water supply pipe has the inner wall of clean economizer simultaneously for can not stay on the inner wall of economizer after the pollutant condensation water in the flue gas, effectively prevented the phenomenon of corruption and taken place.

Description

Boiler flue gas waste heat recovery device

Technical Field

The utility model relates to the technical field of flue gas waste heat recovery, in particular to a boiler flue gas waste heat recovery device.

Background

The boiler is an energy conversion device, the energy input to the boiler is in the form of chemical energy, electric energy and heat energy of high-temperature flue gas in the fuel, and steam or high-temperature water with certain heat energy is output outwards through boiler conversion. In the traditional boiler utilization process, the problems of overhigh exhaust gas temperature and low boiler heat efficiency exist, and aiming at the problems, the flue gas waste heat recovery technology has been proposed, and the heat in the flue gas is recovered and utilized by cooling the flue gas by using heat exchange media such as water or air with lower temperature, but the existing boiler waste heat recovery device adopts a single pipe to convey the heat exchange media, and the waste heat residence time is shorter, the contact area between the flue gas and the heat exchange media is small, so that the waste heat recovery is low, and the heat exchange efficiency is poor; the heat in the flue gas of the boiler can not be discharged in time, and the phenomenon that pollutants in the flue gas are corroded for a long time after being condensed into water can occur.

Disclosure of Invention

The utility model aims to design a boiler flue gas waste heat recovery device which can fully absorb heat in flue gas and effectively prevent corrosion.

In order to achieve the above purpose, the present utility model provides the following technical solutions: the boiler comprises a boiler, a water supply pipeline and an energy saver, wherein a front smoke box and a rear smoke box are respectively arranged on two sides of the boiler, and a smoke outlet is formed in the upper part of the rear smoke box; the energy-saving device is arranged on the upper side of the boiler, a smoke inlet is formed in one side of the energy-saving device, and the smoke inlet is communicated with the smoke outlet through a flue; the water supply pipeline comprises a water supply main pipe, an energy-saving device water supply water pipe and a spray water supply pipe, wherein the water supply main pipe is respectively communicated with the energy-saving device water supply water pipe and the spray water supply water pipe, one end of the energy-saving device water supply water pipe, which is far away from the water supply main pipe, penetrates through the energy-saving device and is communicated with the interior of the boiler, the energy-saving device water supply pipe is a multi-ring pipeline in the energy-saving device, the spray water supply pipe is communicated with the energy-saving device, a sewage outlet is further arranged at the bottom of the energy-saving device, and the sewage outlet is communicated with the sewage drain pipe; the boiler is in communication with a burner.

Further, the water supply pipeline further comprises a boiler water supply pipe, one end of the boiler water supply pipe is communicated with the water supply main pipe, and the other end of the boiler water supply pipe is communicated with the interior of the boiler.

Further, a hearth is arranged at the lower part of the interior of the boiler, and a short smoke pipe and a long smoke pipe are arranged at the upper part of the interior of the boiler; one side of the hearth is communicated with a backfire chamber, and the other side of the hearth penetrates through the front smoke box and is communicated with the burner; the two sides of the short smoke pipe are respectively communicated with the front smoke box and the back combustion chamber, and the two sides of the long smoke pipe are respectively communicated with the front smoke box and the back smoke box.

Further, the energy-saving boiler further comprises a water circulation pipeline, one end of the water circulation pipeline is communicated with the water return pipeline, and the other end of the water circulation pipeline penetrates through the energy-saving device and is communicated with the boiler.

Further, the water circulation pipeline is a multi-ring pipeline inside the energy saver.

Further, an upper filter plate and a lower filter plate are arranged in the energy-saving device, and an activated carbon layer is arranged between the upper filter plate and the lower filter plate.

Further, an air outlet valve is arranged on the upper side of the energy saver.

Further, the drain outlet is provided with a filter screen, and the bottom of the energy saver takes the drain outlet as the center to be conical.

Further, the boiler water supply pipe, the economizer water supply pipe, the spray water supply pipe and the water circulation pipe are all provided with flow regulating valves.

Compared with the prior art, the utility model has the beneficial effects that:

when the energy-saving boiler works, high-temperature flue gas generated by the boiler is conveyed into the energy-saving device through the flue opening, the water supply main pipe is used for conveying the low-temperature water to the water supply pipe and the spray water supply pipe of the energy-saving device, the annular design of the water supply pipe of the energy-saving device is convenient for transmitting heat through the annular pipe, the heat exchange heating surface is increased, and the inside and outside of the annular pipe are enabled to perform full heat exchange; through spraying the atomizing of water supply pipe, adsorb the dirt impurity in the flue gas, then discharge from the sewage pipe through the drain, spray the effect that water supply pipe has the inner wall of clean energy-saving appliance simultaneously for pollutant in the flue gas can not stay on the inner wall of energy-saving appliance after condensing into water, has effectively prevented the phenomenon of corruption and has taken place.

Drawings

In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings that are required in the embodiments or the description of the prior art will be briefly described, it being obvious that the drawings in the following description are only some embodiments of the utility model, and that other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.

FIG. 1 is a perspective view of the present utility model;

FIG. 2 is another angular perspective view of the present utility model;

fig. 3 is a cross-sectional view of the present utility model.

The names of the components marked in the figures are as follows:

1. a boiler; 2. a water circulation pipe; 3. an energy-saving device; 4. a burner; 5. a flue; 6. a water supply main pipe; 7. an economizer water supply pipe; 8. a spray water supply pipe; 10. a sewage outlet; 11. a sewage drain pipe; 12. boiler water supply pipe; 13. a furnace; 14. a long smoke tube; 15. a short smoke tube; 16. a flashback chamber; 17. a front smoke box; 18. a rear smoke box; 19. a filter plate is arranged; 20. a lower filter plate; 21. an activated carbon layer; 22. and an air outlet valve.

Detailed Description

In order to further describe the technical means and effects adopted by the present utility model for achieving the intended purpose, the following detailed description will refer to the specific implementation, structure, characteristics and effects according to the present utility model with reference to the accompanying drawings and preferred embodiments.

10. Examples: referring to fig. 1-3, a boiler flue gas waste heat recovery device comprises a boiler 1, a water supply pipeline and an economizer 3, wherein the boiler 1 is communicated with a combustor 4, a front smoke box 17 and a rear smoke box 18 are respectively arranged on two sides of the boiler 1, a hearth 13 is arranged at the lower part of the interior of the boiler 1, and a plurality of short smoke pipes 15 and a plurality of long smoke pipes 14 are arranged at the upper part of the interior of the boiler; one side of the hearth 13 is communicated with the backfire chamber 16, and the other side penetrates through the front smoke box 17 and is communicated with the burner 4; the two sides of the short smoke pipe 15 are respectively communicated with the front smoke box 17 and the back combustion chamber 16, the two sides of the long smoke pipe 14 are respectively communicated with the front smoke box 17 and the back smoke box 18, the upper part of the back smoke box 18 is provided with a smoke outlet, the burner 4 is started, fuel gas is combusted in the hearth 13 to generate a large amount of high-temperature smoke, the high-temperature smoke enters the back combustion chamber 16 from the hearth 13, the high-temperature smoke enters the back combustion chamber 16 from the short smoke pipe 15 inlet to the short smoke pipe 15 outlet in the back combustion chamber 16, namely the front smoke box 17, and the long smoke pipe 14 inlet to the long smoke pipe 14 outlet of the front smoke box 17, namely the back smoke box 18, the heat exchange heating surfaces are increased due to the arrangement of the short smoke pipe 15 and the long smoke pipe 14, and water in the boiler 1 is heated uniformly; the economizer 3 is installed in the upside of boiler 1, and the mouth of intaking is seted up to one side of economizer 3, and the mouth of intaking passes through flue 5 and outlet port intercommunication, and high temperature flue gas is discharged in the economizer 3 from back smoke box 18, carries out further recycle to the heat in the flue gas.

The water supply pipeline comprises a water supply main pipe 6, an economizer water supply pipe 7 and a spray water supply pipe 8, and also comprises a water supply pipe of the boiler 1, a stop valve is further arranged on the water supply main pipe 6, water supply is closed and opened, the water supply main pipe 6 is also communicated with a water pump, power is supplied to convey water to each device through each water pipe, the water supply main pipe 6 is respectively communicated with the economizer water supply pipe 7 and the spray water supply pipe 8, the water supply pipe 7 of the boiler 1, the spray water supply pipe 8 and the water circulation pipe 2 are all provided with flow regulating valves, one end of the economizer water supply pipe 7, which is far away from the water supply main pipe 6, penetrates through the economizer 3 and is communicated with the interior of the boiler 1, the economizer water supply pipe 7 is a multi-ring pipeline in the economizer 3, the water supply main pipe 6 conveys normal-temperature water to the economizer water supply pipe 7, and exchanges heat with high-temperature flue gas in the economizer 3 through the ring pipeline, and finally flows back to the boiler 1, on one hand, the flue gas waste heat is heated by the heat of the flue gas is utilized, on the other hand, the effect of reducing the temperature is played, and the water quantity and the water speed are regulated by the flow regulating valves, the water quantity and the water speed are slowed down, the effect of the heat of the economizer water supply pipe 7 and the heat is heated by the heat; the spray water supply pipe 8 is communicated with the energy economizer 3, a nozzle is arranged at one end of the spray water supply pipe 8 positioned in the energy economizer 3, the water supply main pipe 6 is used for conveying normal-temperature water to the spray water supply pipe 8, the conveyed normal-temperature water is atomized in the energy economizer 3 through the nozzle, on one hand, the evaporation temperature can be reduced, the smoke exhaust temperature is reduced, the heat exchange efficiency is improved, on the other hand, pollutants in smoke are adsorbed and condensed into water, the environment is prevented from being discharged into the atmosphere, meanwhile, the speed of spray water drops is controlled through the flow regulating valve, the speed of the spray water drops can be slowed down when the boiler 1 works, the heat exchange efficiency is ensured, the heat of the smoke is effectively utilized, the speed of the spray water drops is increased when the boiler 1 does not work, the fast cooling is carried out, and the pollutants of the condensed water in the energy economizer 3 are effectively cleaned; one end of a water supply pipe of the boiler 1 is communicated with a water supply main pipe, the other end of the water supply pipe is communicated with the interior of the boiler 1, a liquid level meter is arranged on one side of the boiler 1 and used for displaying the water level of the boiler 1, the water supply main pipe 6 is used for conveying the water of the boiler 1 to the water supply pipe, the water supply pipe of the boiler 1 is directly conveyed into the boiler 1, and meanwhile, the water flow is controlled through a flow regulating valve; still include water circulation pipeline 2, install the flow control valve on the water circulation pipeline 2, water circulation pipeline 2 one end and return water pipeline intercommunication, the other end runs through energy-saving appliance 3 and boiler 1 intercommunication, water circulation pipeline 2 is the polycyclic pipeline in the inside of energy-saving appliance 3, boiler 1's bottom is equipped with the delivery port, delivery port intercommunication outlet pipe way, outlet pipe way carries the heating system of far away with boiler 1's water, the heating system return water of far away carries out further flue gas heat utilization in carrying energy-saving appliance 3 through return water pipeline, then carry back to boiler 1 in, realize water cyclic utilization, the heat of flue gas obtains the utilization of another step.

The bottom of the energy-saving device 3 is also provided with a drain outlet 10, the drain outlet 10 is communicated with a sewage drain pipe 11, the drain outlet 10 is provided with a filter screen, the bottom of the energy-saving device 3 takes the drain outlet 10 as a center to be conical, sewage condensed into water in smoke is conveniently discharged, the sewage in the energy-saving device 3 is sprayed and generated and washed, the water in the water is further filtered by the filter screen through the drain outlet 10, the filtered water is discharged and treated through the sewage drain pipe 11, and the influence of long-time stay on the energy-saving device 3 after the pollutants in the smoke are condensed into water can be effectively prevented; the air outlet valve is arranged on the upper side of the energy-saving device 3, the upper filter plate 19 and the lower filter plate 20 are arranged in the energy-saving device 3, the active carbon layer 21 is arranged between the upper filter plate 19 and the lower filter plate 20, and the active carbon layer 21 can adsorb pollutants in the flue gas and prevent the flue gas exhausted by the air outlet valve from containing impurities and harmful substances.

The working principle of the embodiment is as follows: when the boiler 1 works, the water supply header pipe 6 supplies water to the water supply pipe of the boiler 1, after the water of the boiler 1 reaches a certain liquid level, the water supply pipe 7 of the economizer supplies water, the burner 4 is started, gas combustion generates high-temperature smoke, the high-temperature smoke sequentially passes through the backfire chamber 16, the short smoke pipe 15, the front smoke box 17, the long smoke pipe 14 and the rear smoke box 18, and reaches the economizer 3 through the flue 5, the water in the water supply pipe 7 of the economizer flows back to the boiler 1 for further heating after heat exchange of the smoke in the economizer 3, the water is sprayed into the water supply pipe 8 for water supply, the interior of the economizer 3 is sprayed and flushed, and sewage condensed into water in the smoke is discharged from the sewage drain pipe through the sewage drain 10.

It will be understood that when an element is referred to as being "fixed to" another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. The terms "upper," "lower," "left," "right," "front," "back," and the like are used herein for illustrative purposes only.

The present utility model is not limited to the above embodiments, but is capable of modification and variation in detail, and other modifications and variations can be made by those skilled in the art without departing from the scope of the present utility model.

Claims

1. The utility model provides a boiler flue gas waste heat recovery device, includes boiler (1), feed pipe, economizer (3), its characterized in that: a front smoke box (17) and a rear smoke box (18) are respectively arranged on two sides of the boiler (1), and a smoke outlet is formed in the upper part of the rear smoke box (18); the energy-saving device (3) is arranged on the upper side of the boiler (1), a smoke inlet is formed in one side of the energy-saving device (3), and the smoke inlet is communicated with the smoke outlet through a flue (5); the water supply pipeline comprises a water supply main pipe (6), an energy-saving device water supply water pipe (7) and a spray water supply water pipe (8), wherein the water supply main pipe (6) is respectively communicated with the energy-saving device water supply water pipe (7) and the spray water supply water pipe (8), one end, far away from the water supply main pipe (6), of the energy-saving device water supply water pipe (7) penetrates through the energy-saving device (3) and is communicated with the interior of the boiler (1), the energy-saving device water supply water pipe (7) is a multi-ring pipeline in the interior of the energy-saving device (3), the spray water supply water pipe (8) is communicated with the energy-saving device (3), a sewage outlet (10) is further formed in the bottom of the energy-saving device (3), and the sewage outlet (10) is communicated with a sewage pipe (11); the boiler (1) is in communication with a burner (4).

2. The boiler flue gas waste heat recovery device according to claim 1, wherein: the water supply pipeline further comprises a boiler water supply pipe (12), one end of the boiler water supply pipe (12) is communicated with the water supply main pipe (6), and the other end of the boiler water supply pipe is communicated with the interior of the boiler (1).

3. The boiler flue gas waste heat recovery device according to claim 1, wherein: the lower part of the interior of the boiler (1) is provided with a hearth (13), and the upper part is provided with a short smoke tube (15) and a long smoke tube (14); one side of the hearth (13) is communicated with a backfire chamber (16), and the other side penetrates through the front smoke box (17) and is communicated with the burner (4); the two sides of the short smoke tube (15) are respectively communicated with the front smoke box (17) and the back combustion chamber (16), and the two sides of the long smoke tube (14) are respectively communicated with the front smoke box (17) and the back smoke box (18).

4. The boiler flue gas waste heat recovery device according to claim 1, wherein: the energy-saving boiler further comprises a water circulation pipeline (2), one end of the water circulation pipeline (2) is communicated with a water return pipeline, and the other end of the water circulation pipeline penetrates through the energy-saving device (3) and is communicated with the boiler (1).

5. The boiler flue gas waste heat recovery device according to claim 4, wherein: the water circulation pipeline (2) is a multi-ring pipeline inside the energy economizer (3).

6. The boiler flue gas waste heat recovery device according to claim 1, wherein: an upper filter plate (19) and a lower filter plate (20) are arranged in the energy-saving device (3), and an activated carbon layer (21) is arranged between the upper filter plate (19) and the lower filter plate (20).

7. The boiler flue gas waste heat recovery device according to claim 6, wherein: an air outlet valve (22) is arranged on the upper side of the energy saver (3).

8. The boiler flue gas waste heat recovery device according to claim 1, wherein: the sewage outlet (10) is provided with a filter screen, and the bottom of the energy economizer (3) takes the sewage outlet (10) as the center to be conical.