Flue gas waste heat utilization structure of coal-fired power plant boiler

Abstract

The utility model discloses a flue gas waste heat utilization structure of a coal-fired power plant boiler, which relates to the technical field of waste heat utilization and comprises a recovery tank, two ends of the recovery tank are respectively connected with a gas inlet part and a gas exhaust part, a heat absorption liner is arranged in the recovery tank, a support frame is arranged on the inner side of the heat absorption liner, and a driving motor is arranged on the inner side of the support frame. The driving motor is fixed to the supporting frame through a supporting column, the output end of the driving motor is fixedly connected with a driving shaft, the supporting frame is fixedly connected with a filter screen, the surface of the driving shaft is fixedly connected with a cleaning piece, the cleaning piece is attached to the filter screen, the bottom of the recycling tank is fixedly connected with a supporting piece, and the interior of the supporting piece is slidably connected with a collecting box. The collection box is communicated with the inner side of the heat absorption container. According to the utility model, heat of high-temperature flue gas generated by the boiler can be recycled, coal cinder in the flue gas can be filtered and collected, pollution to the environment is avoided, and the coal cinder can be recycled subsequently.

Description

Technical Field

[0001] The utility model relates to the technical field of waste heat utilization, in particular to a structure for utilizing waste heat from flue gas in a coal-fired power plant boiler. Background Art

[0002] The waste heat recovery device for flue gas from a coal-fired power plant boiler is a device used to recover the waste heat from the flue gas generated when the coal-fired power plant boiler is in use. It is widely used in places where coal-fired power plant boilers are used, such as power stations, etc., and has a good use effect. With the continuous development of society, people's demand for waste heat recovery devices for flue gas from coal-fired power plants is gradually increasing, but the existing waste heat recovery devices for flue gas from coal-fired power plants boilers cannot meet people's needs.

[0003] After searching, a Chinese patent with application number 202021715955.2 discloses a power plant boiler waste heat utilization structure, including a boiler body, a heating chamber is provided in the boiler body, a heating device for heating a solution medium is provided in the heating chamber, and a recovery component for fully recycling the waste heat in the boiler is provided on one side of the boiler body. This power plant boiler waste heat utilization structure can collect the high-calorie flue gas generated by the boiler when it is in use through the recovery component, so that it can heat the liquid, thereby making full use of the boiler and avoiding the existing problem of directly discharging the high-temperature flue gas generated by the boiler directly into the atmosphere, resulting in energy waste, and ensuring that it can be recycled stably and permanently.

[0004] Although the above patent avoids the problem of directly discharging the high-temperature flue gas generated by the boiler into the atmosphere, resulting in energy waste, and ensures that it can be recycled stably and permanently, in actual applications, since the operation of coal-fired boilers mainly relies on coal as raw materials, there will often be a large amount of coal slag in the flue gas during use. This patent only recovers the heat energy in the flue gas, but does not recover the coal slag in the flue gas, so that the coal slag will be discharged with the flue gas, which will not only pollute the environment but also cause a large amount of waste of resources, thereby reducing the practicality of the patent.

[0005] Therefore, it is necessary to transform the existing boiler waste heat utilization device. Utility Model Content

[0006] The purpose of the utility model is to overcome the above-mentioned deficiencies in the prior art and to provide a coal-fired power plant boiler flue gas waste heat utilization structure with a reasonable structural design, which can not only recycle the heat energy in the flue gas, but also effectively recycle the coal slag in the flue gas for subsequent reuse.

[0007] The technical solution adopted by the utility model to solve the above-mentioned problem is: a structure for utilizing waste heat of flue gas from a boiler in a coal-fired power plant, comprising a recovery tank, characterized in that: an air intake member and an exhaust member are respectively connected to the two ends of the recovery tank, a heat absorbing tank is arranged inside the recovery tank, a support frame is arranged on the inner side of the heat absorbing tank, a driving motor is arranged on the inner side of the support frame, the driving motor is fixed to the support frame through a supporting column, a driving shaft is fixedly connected to the output end of the driving motor, a filter is fixedly connected to the support frame, a cleaning member is fixedly connected to the surface of the driving shaft, the cleaning member is fitted with the filter, a supporting member is fixedly connected to the bottom of the recovery tank, a collecting box is slidably connected to the inside of the supporting member, and the collecting box is communicated with the inner side of the heat absorbing tank.

[0008] Furthermore, the exhaust end of the air inlet member is provided with three exhaust ports, and the three exhaust ports are evenly distributed in a ring shape and located on the outside of the support frame.

[0009] Furthermore, a sealing ring is provided on the outer side of one end of the support frame close to the exhaust member, and the sealing ring is in contact with the heat absorbing tube.

[0010] Furthermore, two sides of the recovery tank are respectively connected with a water inlet pipe and a drain pipe.

[0011] Furthermore, the inner wall of the recovery tank is provided with heat preservation.

[0012] Furthermore, the number of the cleaning pieces is three groups, and the three groups of cleaning pieces are evenly distributed.

[0013] Compared with the prior art, the utility model has the following advantages and effects: the utility model can recycle the heat of the high-temperature flue gas generated by the boiler, and can also filter and collect the coal slag in the flue gas, thus avoiding pollution to the environment, and can reuse it later. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0015] Figure 2 It is a structural schematic diagram of the utility model from another angle;

[0016] Figure 3 It is a schematic diagram of the cross-sectional structure of the utility model.

[0017] In the figure: recovery tank 1, air inlet part 2, exhaust part 3, heat absorbing tube 4, support frame 5, drive motor 6, drive shaft 7, filter screen 8, cleaning part 9, support part 10, collection box 11, exhaust port 12, sealing ring 13, water inlet pipe 14, drain pipe 15. DETAILED DESCRIPTION

[0018] The present invention will be further described in detail below with reference to the accompanying drawings and through examples. The following examples are provided to explain the present invention, but the present invention is not limited to the following examples.

[0019] See also Figures 1 to 3 A structure for utilizing waste heat from flue gas in a coal-fired power plant boiler comprises a recovery tank 1, wherein both ends of the recovery tank 1 are respectively connected with an air intake member 2 and an air exhaust member 3, a heat absorbing tank 4 is arranged inside the recovery tank 1, a support frame 5 is arranged inside the heat absorbing tank 4, a driving motor 6 is arranged inside the support frame 5, the driving motor 6 is fixed to the support frame 5 through a supporting column, a driving shaft 7 is fixedly connected to the output end of the driving motor 6, a filter screen 8 is fixedly connected to the support frame 5, a cleaning member 9 is fixedly connected to the surface of the driving shaft 7, the cleaning member 9 is fitted with the filter screen 8, a support member 10 is fixedly connected to the bottom of the recovery tank 1, a collecting box 11 is slidably connected inside the support member 10, and the collecting box 11 is communicated with the inner side of the heat absorbing tank 4.

[0020] The exhaust end of the air inlet 2 is provided with three exhaust ports 12, which are evenly distributed in a ring shape and located outside the support frame 5. The exhaust ports 12 are provided to divert the smoke entering the air inlet 2, ensuring that the smoke enters the filter 8 from the outside, so that the smoke is filtered by the filter 8.

[0021] A sealing ring 13 is arranged on the outer side of one end of the support frame 5 close to the exhaust member 3, and the sealing ring 13 is in contact with the heat absorbing liner 4. The setting of the sealing ring 13 can block the movement trajectory of the smoke and prevent it from being trapped in the gap between the heat absorbing liner 4 and the support frame 5 so that it cannot be discharged.

[0022] The two sides of the recovery tank 1 are respectively connected with a water inlet pipe 14 and a drain pipe 15. Through the arrangement of the water inlet pipe 14 and the drain pipe 15, it is convenient to replenish or discharge liquid from the recovery tank 1, so that it is convenient for the staff to use.

[0023] The inner wall of the recovery tank 1 is provided with a heat-insulating device, which can reduce the heat loss of the recovery tank 1 and prevent the staff from being scalded by the surface of the recovery tank 1 .

[0024] The number of cleaning parts 9 is three groups, and the three groups of cleaning parts 9 are evenly distributed. Through the arrangement of the three groups of cleaning parts 9, the cleaning frequency of the filter screen 8 can be increased, thereby preventing the filter screen 8 from being blocked by too much coal slag.

[0025] When in use, first connect the air intake member 2 with the exhaust port of the external coal-fired power plant boiler, and connect the exhaust member 3 with the external tail gas treatment mechanism, and then inject liquid into the cavity between the recovery tank 1 and the heat absorbing tank 4 through the water inlet pipe 14. When the exhaust port of the external coal-fired power plant boiler discharges high-temperature flue gas, the flue gas first enters the recovery tank 1 through the exhaust port 12 on the air intake member 2, and the flue gas contacts the heat absorbing tank 4, so that the heat in the flue gas can be absorbed, and then the liquid is heated, so that the waste heat of the flue gas can be reused, and then the flue gas enters the interior of the support frame 5 through the filter 8, and is finally discharged through the exhaust member 3. The coal slag in the flue gas is filtered and intercepted by the filter 8 and can fall into the collection box 11 below. The coal slag retained in the hole of the filter 8 can be driven by the driving motor 6 to rotate the driving shaft 7, and then the cleaning member 9 can be driven to rotate, so that the filter 8 can be cleaned to prevent the filter 8 from being blocked, and the filtered coal slag falls into the collection box 11 for centralized collection, so that it can be reused later.

[0026] The contents not described in detail in this specification belong to the prior art known to professional and technical personnel in this field.

[0027] In addition, it should be noted that the above content described in this specification is only an example of the structure of the utility model. All equivalent changes made based on the structure, features and principles described in the utility model patent are included in the protection scope of the utility model patent. Technicians in the technical field of the utility model can make various modifications, supplements or replace the specific embodiments described in a similar manner, as long as they do not deviate from the structure of the utility model or exceed the scope defined by the claims, they should all fall within the protection scope of the utility model.

Claims

1. A structure for utilizing waste heat from flue gas of a coal-fired power plant boiler, comprising a recovery tank (1), characterized in that: The two ends of the recovery tank (1) are respectively connected to an air intake member (2) and an air exhaust member (3); a heat absorbing liner (4) is arranged inside the recovery tank (1); a support frame (5) is arranged inside the heat absorbing liner (4); a drive motor (6) is arranged inside the support frame (5); the drive motor (6) is fixed to the support frame (5) through a support column; an output end of the drive motor (6) is fixedly connected to a drive shaft (7); a filter screen (8) is fixedly connected to the support frame (5); a cleaning member (9) is fixedly connected to the surface of the drive shaft (7); the cleaning member (9) is fitted with the filter screen (8); a support member (10) is fixedly connected to the bottom of the recovery tank (1); a collection box (11) is slidably connected to the inside of the support member (10); the collection box (11) is communicated with the inside of the heat absorbing liner (4).

2. The structure for utilizing waste heat from flue gas in a coal-fired power plant boiler according to claim 1 is characterized in that: The exhaust end of the air inlet member (2) is provided with three exhaust ports (12), and the three exhaust ports (12) are evenly distributed in a ring shape and are located outside the support frame (5).

3. The structure for utilizing waste heat from flue gas from a coal-fired power plant boiler according to claim 1 is characterized in that: A sealing ring (13) is provided on the outer side of one end of the support frame (5) close to the exhaust member (3), and the sealing ring (13) is in contact with the heat absorbing tank (4).

4. The structure for utilizing waste heat from flue gas in a coal-fired power plant boiler according to claim 1 is characterized in that: The two sides of the recovery tank (1) are respectively connected to a water inlet pipe (14) and a drain pipe (15).

5. The structure for utilizing waste heat from flue gas in a coal-fired power plant boiler according to claim 1 is characterized in that: The inner wall of the recovery tank (1) is heat-insulating.

6. The structure for utilizing waste heat from flue gas in a coal-fired power plant boiler according to claim 1 is characterized in that: The number of the cleaning pieces (9) is three groups, and the three groups of cleaning pieces (9) are evenly distributed.

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