CN215175213U

CN215175213U - Air preheater

Info

Publication number: CN215175213U
Application number: CN202120827716.4U
Authority: CN
Inventors: 范承前; 蒋再春; 董继鹏; 王宗亮; 吴哲明; 黄八六; 余文富; 周兴; 赵明; 梁晓东; 冉毅; 刘杰; 宋科华; 郑天平
Original assignee: Panzhihua Dahutong Titanium Co ltd
Current assignee: Panzhihua Dahutong Titanium Co ltd
Priority date: 2021-04-21
Filing date: 2021-04-21
Publication date: 2021-12-14
Anticipated expiration: 2031-04-21

Abstract

The utility model relates to a flue gas preheats the technical field who utilizes the device, particularly, relates to an air heater, including washing tank, heat exchanger. The cleaning tank is provided with a flue gas inlet and a flue gas outlet. The heat exchanger comprises a flue gas channel and an air channel. The flue gas channel is connected with the flue gas outlet. When in use, the flue gas inlet is communicated to the exhaust port of the boiler. Meanwhile, an air passage is communicated to the inside of the boiler. Air enters the interior of the boiler through the air passage. Flue gas generated by combustion in the boiler enters the cleaning tank through the flue gas inlet. The flue gas is mixed with the cleaning liquid in the cleaning tank, and then the smoke dust and the like in the flue gas are cleaned. The cleaned flue gas enters the heat exchange channel and exchanges heat with the air in the air channel in the flue gas channel, and then the air is heated. The heated air then enters the filter interior. The air preheater not only can utilize the waste heat of the boiler waste gas to heat the air, but also can clean the flue gas, and is more diversified.

Description

Air preheater

Technical Field

The utility model relates to a flue gas preheats the technical field who utilizes the device, particularly, relates to an air heater.

Background

The air preheater is a common device for preheating and utilizing the flue gas. When the air preheater in the prior art is used, smoke and dust are easily accumulated in the smoke channel, and the heat exchange effect is influenced. Meanwhile, the air preheater in the prior art cannot clean and filter smoke and is single in function.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide an air heater, its washing flue gas that can be fine.

The embodiment of the utility model discloses a realize through following technical scheme:

an air preheater comprises a cleaning tank and a heat exchanger; the cleaning tank is provided with a flue gas inlet and a flue gas outlet; the heat exchanger comprises a flue gas channel and an air channel; the flue gas channel is connected with the flue gas outlet.

Further, the heat exchanger is arranged above the cleaning tank and seals the cleaning tank; the flue gas channel is communicated with the interior of the cleaning tank; the flue gas inlet is communicated with the bottom of the cleaning tank.

Further, the flue gas inlet comprises a plurality of exhaust pipes; and the pipe orifices of the exhaust pipes are uniformly distributed at the bottom of the cleaning tank.

Further, the cleaning tank is provided with a water inlet pipe and a water outlet pipe; the drain pipe is connected to the tank bottom of the cleaning tank.

Further, the cleaning tank is also provided with a cleaning opening; the cleaning opening is provided with a sealing door.

Further, the smoke channel and the air channel are both in a spiral shape; the smoke channel is attached to the air channel; the flue gas passageway and the coincide of air passageway are the cylindric of extending from top to bottom.

Further, the lower end of the smoke channel is communicated with the top of the cleaning groove, and the upper end of the smoke channel is connected with an air pump.

Furthermore, the upper end of the air channel is an air inlet, and the lower end of the air channel is an air outlet.

The utility model discloses technical scheme has following advantage and beneficial effect at least:

the utility model discloses an air heater during the use, communicates the gas vent of boiler with the flue gas entry. Meanwhile, an air passage is communicated to the inside of the boiler. Air enters the interior of the boiler through the air passage. Flue gas generated by combustion in the boiler enters the cleaning tank through the flue gas inlet. The flue gas is mixed with the cleaning liquid in the cleaning tank, and then the smoke dust and the like in the flue gas are cleaned. The cleaned flue gas enters the heat exchange channel and exchanges heat with the air in the air channel in the flue gas channel, and then the air is heated. The heated air then enters the boiler interior.

The utility model discloses an air heater not only can utilize preheating of boiler waste gas to heat the air, can also wash the flue gas, and the function is various.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings that are required to be used in the embodiments will be briefly described below, it should be understood that the following drawings only illustrate some embodiments of the present invention, and therefore should not be considered as limiting the scope, and for those skilled in the art, other related drawings can be obtained according to the drawings without inventive efforts.

Fig. 1 is a schematic view of an external structure of an air preheater provided by the present invention;

fig. 2 is the internal structure schematic diagram of the air preheater provided by the utility model.

Icon: 1-cleaning tank, 11-flue gas inlet, 111-exhaust pipe, 12-water inlet pipe, 13-water outlet pipe, 14-cleaning port, 15-sealing door, 2-heat exchanger, 21-flue gas channel, 22-air channel and 3-air pump.

Detailed Description

In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, 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, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. The components of embodiments of the present invention, as generally described and illustrated in the figures herein, may be arranged and designed in a wide variety of different configurations.

Thus, the following detailed description of the embodiments of the present invention, presented in the accompanying drawings, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts belong to the protection scope of the present invention.

It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, it need not be further defined and explained in subsequent figures.

In the description of the present invention, it should be noted that, if the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, or the orientation or positional relationship which is usually placed when the product of this application is used, the description is only for convenience of description and simplification, but the indication or suggestion that the device or element to be referred must have a specific orientation, be constructed in a specific orientation and be operated is not to be construed as limiting the present invention.

In the description of the present invention, it should be further noted that unless otherwise explicitly stated or limited, the terms "disposed," "mounted," "connected," and "connected" should be interpreted broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood in specific cases to those skilled in the art.

Example (b):

as shown in fig. 1 and 2, the present invention provides an air preheater, which comprises a cleaning tank 1 and a heat exchanger 2. The cleaning tank 1 is used for containing cleaning liquid. The cleaning tank 1 is provided with a flue gas inlet 11 and a flue gas outlet. The flue gas inlet 11 is communicated with the lower part of the liquid level of the cleaning tank 1. The heat exchanger 2 may be a plate heat exchanger 2 or a jacketed heat exchanger 2 or the like. The heat exchanger 2 comprises a flue gas channel 21 and an air channel 22. The flue gas channel 21 is connected to the flue gas outlet.

The utility model discloses an air heater when using, communicates flue gas entry 11 to the gas vent of boiler. Meanwhile, the air passage 22 is communicated to the inside of the boiler. Air enters the interior of the boiler through an air passage 22. Flue gas generated by combustion in the boiler enters the cleaning tank 1 through the flue gas inlet 11. The flue gas is mixed with the cleaning liquid in the cleaning tank 1, and then the smoke dust and the like in the flue gas are cleaned. The cleaned flue gas enters the heat exchange channel and exchanges heat with the air in the air channel 22 in the flue gas channel 21, and then the air is heated. The heated air then enters the boiler interior.

In this embodiment, the heat exchanger 2 is disposed above the cleaning tank 1 and seals the cleaning tank 1. So that a closed cleaning chamber is formed between the heat exchanger 2 and the cleaning tank 1. The flue gas channel 21 of the heat exchanger 2 is communicated with the inside of the cleaning tank 1. The flue gas inlet 11 is communicated with the bottom of the cleaning tank 1. The cleaning tank 1 and the heat exchanger 2 are integrated, so that the volume is reduced. Meanwhile, connecting parts between the two are reduced, and the structure is simplified. Meanwhile, the flue gas in the cleaning chamber naturally enters the heat exchanger 2.

In particular, the flue gas inlet 11 comprises a number of exhaust pipes 111. The orifices of the exhaust pipes 111 are uniformly distributed at the bottom of the cleaning tank 1. Therefore, the flue gas can be well mixed with the cleaning liquid in the cleaning tank 1, and the cleaning effect of the flue gas is ensured.

In this embodiment, the cleaning tank 1 is provided with a water inlet pipe 12 and a water outlet pipe 13. Drain pipe 13 is connected to the bottom of washing tub 1. The cleaning solution can be conveniently and timely supplemented into the cleaning tank 1. The cleaning liquid and the cleaned smoke in the cleaning tank 1 can be conveniently discharged.

In this embodiment, the cleaning tank 1 is further provided with a cleaning opening 14. The cleaning opening 14 is provided with a sealing door 15. After the cleaning tank 1 is used for a long time, impurities such as smoke and dust adhere to the inner wall of the cleaning tank. The inside of the sealing door 15 can be conveniently cleaned by opening the sealing door.

In this embodiment, the flue gas channel 21 and the air channel 22 are both helical. The flue gas channel 21 is arranged in abutment with the air channel 22. The smoke passage 21 and the air passage 22 are overlapped to form a cylindrical shape extending up and down. The upper and lower sides of the flue gas channel 21 are air channels 22. Similarly, the upper and lower sides of the air channel 22 are the flue gas channel 21. This enables good heat exchange between the flue gas channel 21 and the air channel 22, and ensures the air preheating effect. Meanwhile, the smoke channel 21 is arranged to be upward spiral, so that the circulation path of smoke is lengthened, and the heat exchange effect is better. In addition, the cleaning liquid in the cleaning tank 1 is heated and evaporated to form water vapor. The water vapor is heat exchanged in the flue gas channel 21 and condensed into water droplets. The flue gas channel 21 is arranged in a spiral shape, so that water drops can easily flow back to the cleaning tank 1 along the pipe wall of the flue gas channel 21.

In this embodiment, the lower end of the flue gas channel 21 is communicated with the top of the cleaning tank 1, and the upper end is connected with the air pump 3. The air pump 3 is used for pumping air to ensure that the flue gas in the boiler can enter the cleaning tank 1 and the heat exchanger 2.

After the flue gas in the flue gas channel 21 is subjected to heat exchange, the temperature of the flue gas is gradually reduced. In this embodiment, the air passage 22 has an air inlet at the upper end and an air outlet at the lower end. This makes the temperature of the flue gas contacting with the air gradually rise in the process that the air gradually flows into the boiler through the air passage 22, so that the temperature of the air entering the boiler is the highest value, and the preheating effect is ensured.

The above is only a preferred embodiment of the present invention, and is not intended to limit the present invention, and various modifications and changes will occur to those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. An air preheater is characterized in that: comprises a cleaning tank (1) and a heat exchanger (2); the cleaning tank (1) is provided with a flue gas inlet (11) and a flue gas outlet; the heat exchanger (2) comprises a flue gas channel (21) and an air channel (22); the flue gas channel (21) is connected with the flue gas outlet.

2. An air preheater as set forth in claim 1, wherein: the heat exchanger (2) is arranged above the cleaning tank (1) and seals the cleaning tank (1); the flue gas channel (21) is communicated with the inside of the cleaning tank (1); the flue gas inlet (11) is communicated with the bottom of the cleaning tank (1).

3. An air preheater as set forth in claim 2, wherein: the flue gas inlet (11) comprises a plurality of exhaust pipes (111); the orifices of the exhaust pipes (111) are uniformly distributed at the bottom of the cleaning tank (1).

4. An air preheater as set forth in claim 3, wherein: the cleaning tank (1) is provided with a water inlet pipe (12) and a water outlet pipe (13); the drain pipe (13) is connected to the bottom of the cleaning tank (1).

5. An air preheater as set forth in claim 4, wherein: the cleaning tank (1) is also provided with a cleaning opening (14); the cleaning opening (14) is provided with a sealing door (15).

6. An air preheater as set forth in claim 5, wherein: the smoke channel (21) and the air channel (22) are both spiral; the smoke channel (21) is attached to the air channel (22); the smoke channel (21) and the air channel (22) are overlapped to form a cylinder shape extending up and down.

7. An air preheater as set forth in claim 6, wherein: the lower end of the smoke channel (21) is communicated with the top of the cleaning tank (1), and the upper end of the smoke channel is connected with an air pump (3).

8. An air preheater as set forth in claim 7, wherein: the upper end of the air channel (22) is an air inlet, and the lower end of the air channel is an air outlet.