Power plant flue heat energy recovery device

Abstract

The utility model relates to the technical field of heat energy recovery devices, in particular to a heat energy recovery device for a flue of a power plant, which improves the convenience of automatically cleaning dirt by utilizing flue gas flow and improves the heat energy recovery effect. Comprising a shell and an inner container, the inner container is arranged in the shell, and a cavity is formed between the inner container and the shell; the conical filter screen is installed on the inner side wall of the inner container, the rotating shaft is rotationally installed in the inner container through a support, the lower portion of the rotating shaft rotationally penetrates through the conical filter screen, the blades are installed at the top end of the rotating shaft, and the scraper is installed at the bottom end of the rotating shaft; the outer side wall of the scraping plate makes contact with the bottom face of the conical filter screen, the air inlet device is arranged at the bottom of the shell in a communicating mode, the air inlet device is used for conveying smoke dust into the inner container and collecting dirt, and the circulating device is communicated with the cavity and used for conveying cold water in the cavity.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of heat recovery device, in particular to a power plant flue heat recovery device. BACKGROUND

[0002] Under the background of the growing global energy demand and the increasing environmental protection awareness, the power plant flue heat recovery device as a kind of efficient energy-saving and environmental protection technical means, the main purpose of this device is to recover the heat energy in the high-temperature flue gas discharged by power plant flue, and convert it into reusable energy, so as to realize the goal of energy saving and emission reduction and energy efficient utilization.

[0003] As prior art patent with CN204165067U, the utility model belongs to the boiler inner heat energy waste heat recovery device, specifically relates to a boiler flue heat recovery system, especially suitable for the heat energy recovery and utilization of the boiler flue in printing and dyeing enterprise.A kind of boiler flue heat recovery system, including boiler, the top of the boiler is equipped with flue, the flue is through heat exchange box and is stretched out from heat exchange box after heat exchange box, dust collector is equipped between the flue and heat exchange box, the heat exchange box is equipped with cold water inlet pipe and hot water outlet pipe respectively, water temperature sensor is equipped in the heat exchange box, hot water pump is equipped on the hot water outlet pipe, the water temperature sensor is electrically connected with hot water pump by main control circuit, the hot water outlet pipe is communicated with the hot water conveying pipeline of boiler.

[0004] But the equipment is found in use, the equipment is not convenient for using the flow power of flue gas to clean the filtered dirt, increases the energy consumption of dirt cleaning, reduces the convenience of use. UTILITY MODEL CONTENT

[0005] To solve the above technical problems, the utility model provides a power plant flue heat recovery device which improves the convenience of automatically cleaning dirt by using flue gas flow and improves heat recovery effect.

[0006] The utility model discloses a power plant flue heat recovery device, including the shell and the inner bag, and the inner bag sets up in the shell inside, is provided with the chamber between the inner bag and the shell, still including air intake device, circulating device, conical filter screen, pivot, vane and scraper, conical filter screen installs on the inner bag inner side wall, and the pivot is rotatoryly installed in the inner bag inside through the support, and the pivot lower part rotates and passes through conical filter screen, and the vane is installed at the pivot top, and the scraper is installed at the pivot bottom, and the outer side wall of scraper is in contact with the bottom surface of conical filter screen, and the air intake device is communicated and is set up in the shell bottom, and the air intake device is used for the dust of flue gas to be transported to the inner bag, and the air intake device is used for collecting dirt, and the circulating device is communicated with the chamber, and the circulating device is used for the cold water to be transported in the chamber, through the air intake device, high temperature flue gas is transported to the inner bag inside, and the inner bag is heated through flue gas, makes the cold water in the chamber heat to the inner bag, thereby makes the heat energy in the flue gas recycle and utilize, and the flue gas is discharged from the inner bag upwards and passes through conical filter screen and flows through the vane, and the dust in the flue gas is intercepted through conical filter screen, thereby makes the flue gas purification treatment, and the vane is rotated when the flue gas flows, and the vane is rotated and drives the pivot to rotate, thereby makes the pivot drive scraper circumferential movement and scrape the dirt attached to the bottom of conical filter screen, and the dirt scraped through gravity falls to the air intake device, thereby improves the convenience of device automatic cleaning dirt with flue gas flow.

[0007] Preferably, the air intake device includes a delivery device, a collection box, a closure door, a smoke inlet pipe, and a flow guide groove. The collection box is connected to the bottom end of the shell and communicates with the inner bag. The closure door is installed on the lower portion of the outer side wall of the collection box. The smoke inlet pipe is communicatively disposed on the upper portion of the outer side wall of the collection box. The flow guide groove is installed on the inner bottom portion of the collection box. The collection box is provided with the delivery device, which is used to discharge dirt outward. High-temperature flue gas is delivered into the collection box through the smoke inlet pipe, and then the flue gas enters the inner bag. The dirt falling from the bottom of the conical filter screen enters the collection box. The dirt is collected and treated through the flow guide groove. The closure door and the delivery device are opened periodically, so that the delivery device discharges the dirt collected in the flow guide groove outward, improving the convenience of automatic dirt cleaning.

[0008] Preferably, the circulating device includes a water tank, a pump body, a delivery pipe, and two groups of connecting pipes. The input end of the pump body is communicatively disposed at the lower portion of the chamber. The output end of the pump body communicates with the water tank. The input end of the delivery pipe communicates with the water tank. The output end of the delivery pipe is communicatively disposed at the upper portion of the chamber. The two groups of connecting pipes are respectively communicatively disposed on the water tank. Cold water is delivered into the water tank through the first group of connecting pipes. The cold water in the water tank is pumped by the pump body, so that the cold water enters the chamber. The cold water is heated by the inner bag. The heated water is returned to the water tank through the delivery pipe. Hot water is discharged through the second group of connecting pipes, improving the convenience of flue gas waste heat utilization.

[0009] Preferably, the conveying device comprises a support shaft, a first spiral blade and a motor, the support shaft is rotatably installed on the inner side wall of the collecting box, the first spiral blade is installed on the outer side wall of the support shaft, the motor is installed on the outer side wall of the collecting box, and the output end of the motor is connected with the support shaft; the support shaft is driven to rotate by the motor, so that the support shaft drives the first spiral blade to rotate, thereby the first spiral blade discharges the dirt concentrated in the flow guide groove outward, improving the convenience of dirt cleaning.

[0010] Preferably, the second spiral blade is further arranged, the second spiral blade is installed on the outer side wall of the inner container, and the second spiral blade is arranged in the chamber; the cold water in the chamber is guided and conveyed by the second spiral blade, the contact effect of the cold water with the inner container is increased, and the heat exchange effect is improved.

[0011] Preferably, the smoke exhaust pipe is further arranged, the smoke exhaust pipe is installed at the top end of the shell, and the bottom end of the smoke exhaust pipe is communicated with the inner container; the smoke discharged from the inner container is conveyed upward through the smoke exhaust pipe, and the convenience of discharging the smoke to the outdoor is improved.

[0012] Preferably, the outer side wall of the shell is provided with a heat preservation layer; the heat loss in the shell is reduced, and the heat energy recovery effect is improved.

[0013] Compared with the prior art, the beneficial effects of the utility model are that: the high-temperature flue gas is conveyed to the inner container through the air inlet device, the inner container is heated by the flue gas, the cold water in the chamber is heated by the inner container, thereby the heat energy in the flue gas is recycled, the flue gas is discharged upward from the inner container, passes through the conical filter screen and flows through the blade, the dust and dirt in the flue gas are intercepted through the conical filter screen, thereby the flue gas is purified, the blade is driven to rotate when the flue gas flows, the shaft is driven to rotate after the blade rotates, thereby the shaft drives the scraper to move circumferentially and scrape off the dirt attached to the bottom of the conical filter screen, the scraped dirt falls downward into the air inlet device through gravity, thereby the convenience of automatically cleaning the dirt by the device using the flue gas flow is improved. BRIEF DESCRIPTION OF DRAWINGS

[0014] Figure 1 is the axonometric structure schematic view of the utility model;

[0015] Figure 2 is the axonometric structure schematic view of the connection of the shell and the collecting box;

[0016] Figure 3 is the axonometric local structure schematic view of the connection of the shell and the inner container;

[0017] Figure 4 is the axonometric local structure schematic view of the connection of the support shaft and the first spiral blade;

[0018] Figure 5 is the axonometric local structure schematic view of the connection of the inner container and the second spiral blade.

[0019] Marked in the drawing: 1, shell; 2, inner container; 3, conical filter screen; 4, rotating shaft; 5, blade; 6, scraper; 7, collection box; 8, closing door; 9, smoke inlet pipe; 10, flow guide groove; 11, water tank; 12, pump body; 13, conveying pipe; 14, connecting pipe; 15, support shaft; 16, first spiral blade; 17, motor; 18, second spiral blade; 19, smoke exhaust pipe. DETAILED DESCRIPTION

[0020] In order to facilitate the understanding of the present application, the present application will be described more fully below with reference to the accompanying drawings. The present application can be realized in many different forms and is not limited to the embodiments described herein. On the contrary, the purpose of providing these embodiments is to make the disclosure of the present application more thorough and comprehensive.

[0021] Example 1

[0022] As Figures 1 to 5 shown, the power plant flue heat recovery device of the present application comprises a shell 1 and an inner container 2, the inner container 2 is arranged inside the shell 1, and a chamber is arranged between the inner container 2 and the shell 1; further comprising an air inlet device, a circulating device, a conical filter screen 3, a rotating shaft 4, a blade 5 and a scraper 6, the conical filter screen 3 is installed on the inner side wall of the inner container 2, the rotating shaft 4 is rotatably installed inside the inner container 2 through a support, and the lower part of the rotating shaft 4 rotates through the conical filter screen 3, the blade 5 is installed at the top end of the rotating shaft 4, the scraper 6 is installed at the bottom end of the rotating shaft 4, the outer side wall of the scraper 6 is in contact with the bottom surface of the conical filter screen 3, the air inlet device is communicatively arranged at the bottom of the shell 1, the air inlet device is used for conveying flue dust into the inner container 2, and the air inlet device is used for collecting dirt, the circulating device is in communication with the chamber, and the circulating device is used for conveying cold water in the chamber;

[0023] As Figure 2 shown, the air inlet device comprises a conveying device, a collection box 7, a closing door 8, a smoke inlet pipe 9 and a flow guide groove 10, the top end of the collection box 7 is connected with the bottom end of the shell 1, and the collection box 7 is in communication with the inner container 2, the closing door 8 is installed at the lower part of the outer side wall of the collection box 7, the smoke inlet pipe 9 is communicatively arranged at the upper part of the outer side wall of the collection box 7, and the flow guide groove 10 is installed at the inner bottom of the collection box 7; The collection box 7 is provided with a conveying device, and the conveying device is used for discharging dirt outward;

[0024] In the embodiment, the high-temperature flue gas is delivered to the inner container 2 by the air inlet device, the inner container 2 is heated by the flue gas, the inner container 2 heats the cold water in the chamber, so that the heat energy in the flue gas is recycled, and the flue gas flows through the conical filter screen 3 and the blades 5 when being discharged upwards from the inner container 2, the dust and dirt in the flue gas are intercepted by the conical filter screen 3, so that the flue gas is purified, the blades 5 are rotated when the flue gas flows, the rotation of the blades 5 drives the rotation of the rotating shaft 4, so that the rotating shaft 4 drives the peripheral movement of the scraper 6 to scrape off the dirt attached to the bottom of the conical filter screen 3, and the scraped dirt falls into the air inlet device by gravity, so that the convenience of automatically cleaning the dirt by the flue gas flow is improved.

[0025] Embodiment 2

[0026] Based on the embodiment 1, as shown in the embodiment 2, the power plant flue heat recovery device comprises a circulating device, an air inlet device, a collecting box 7, a conical filter screen 3, a rotating shaft 4, a scraper 6, a shell 1, an inner container 2, a chamber, a water tank 11, a pump body 12, a conveying pipe 13 and two groups of connecting pipes 14. Figure 2 As shown in the embodiment 2, the conveying device comprises a supporting shaft 15, a first spiral blade 16 and a motor 17, the supporting shaft 15 is rotatably installed on the inner side wall of the collecting box 7, the first spiral blade 16 is installed on the outer side wall of the supporting shaft 15, and the motor 17 is installed on the outer side wall of the collecting box 7.

[0027] Figure 4 As shown in the embodiment 2, the conveying device further comprises a second spiral blade 18, the second spiral blade 18 is installed on the outer side wall of the inner container 2, and the second spiral blade 18 is arranged in the chamber.

[0028] As shown in the embodiment 2, the device further comprises a smoke exhaust pipe 19, the smoke exhaust pipe 19 is installed at the top end of the shell 1, and the bottom end of the smoke exhaust pipe 19 is communicated with the inner container 2. Figure 2 As shown in the embodiment 2, the outer side wall of the shell 1 is provided with a heat preservation layer.

[0029] Figure 2 As shown in the embodiment 2, the outer side wall of the shell 1 is provided with a heat preservation layer.

[0030] As shown in the embodiment 2, the outer side wall of the shell 1 is provided with a heat preservation layer. Figure 1

[0031] ​​​In this embodiment, high-temperature flue gas is transported to the inside of the collection box 7 through the flue gas inlet pipe 9. Then, the flue gas enters the inside of the inner liner 2. The dirt that falls from the bottom of the cone-shaped filter screen 3 enters the inside of the collection box 7. The dirt is collected and processed by the guide channel 10. By periodically opening the sealing door 8 and the conveying device, the conveying device discharges the dirt collected in the guide channel 10 to the outside, improving the convenience of automatic dirt cleaning. Cold water is transported to the inside of the water tank 11 through the first set of connecting pipes 14. The cold water in the water tank 11 is drawn out by the pump body 12 and enters the inside of the chamber. The cold water is heated by the inner liner 2, so that the heated water flows back to the water tank 11 through the conveying pipe 13. The hot water is discharged through the second set of connecting pipes 14, improving the convenience of flue gas waste heat utilization.

[0032] This utility model discloses a power plant flue gas heat recovery device. During operation, high-temperature flue gas is transported to the inner liner 2 through an air intake device. The flue gas heats the inner liner 2, which in turn heats the cold water inside the chamber, thereby recovering and utilizing the heat energy in the flue gas. When the flue gas is discharged upward from the inner liner 2, it passes through a conical filter screen 3 and flows through blades 5. The conical filter screen 3 intercepts dust and dirt in the flue gas, thereby purifying the flue gas. The flow of flue gas drives the blades 5 to rotate, and the rotation of the blades 5 drives the rotating shaft 4 to rotate. This causes the rotating shaft 4 to move the scraper 6 circumferentially to scrape off the dirt attached to the bottom of the conical filter screen 3. The scraped dirt falls downward into the air intake device by gravity.

[0033] The pump body 12 and motor 17 of the power plant flue heat recovery device of this utility model are commercially available. Technical personnel in this industry only need to install and operate them according to the accompanying instruction manual, without requiring any creative work from those skilled in the art.

[0034] The above description is only a preferred embodiment of the present utility model. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the technical principles of the present utility model, and these improvements and modifications should also be considered within the protection scope of the present utility model.

Claims

1. A power plant flue heat recovery device, comprising a shell (1) and an inner liner (2), wherein the inner liner (2) is disposed inside the shell (1), and a chamber is provided between the inner liner (2) and the shell (1); characterized in that, It also includes an air intake device, a circulation device, a conical filter (3), a rotating shaft (4), blades (5), and a scraper (6). The conical filter (3) is installed on the inner wall of the inner liner (2). The rotating shaft (4) is rotatably installed inside the inner liner (2) through a bracket, and the lower part of the rotating shaft (4) rotates through the conical filter (3). The blades (5) are installed at the top of the rotating shaft (4). The scraper (6) is installed at the bottom of the rotating shaft (4). The outer wall of the scraper (6) contacts the bottom surface of the conical filter (3). The air intake device is connected to the bottom of the housing (1). The air intake device is used to transport flue gas and dust to the inner liner (2) and to collect dirt. The circulation device is connected to the chamber and is used to transport cold water in the chamber.

2. The power plant flue gas heat recovery device as described in claim 1, characterized in that, The air intake device includes a conveying device, a collection box (7), a sealing door (8), a smoke inlet pipe (9), and a guide groove (10). The top of the collection box (7) is connected to the bottom of the shell (1), and the collection box (7) is connected to the inner liner (2). The sealing door (8) is installed on the lower part of the outer wall of the collection box (7). The smoke inlet pipe (9) is connected to the upper part of the outer wall of the collection box (7). The guide groove (10) is installed at the bottom of the collection box (7). The collection box (7) is equipped with a conveying device, which is used to discharge dirt to the outside.

3. The power plant flue gas heat recovery device as described in claim 1, characterized in that, The circulation device includes a water tank (11), a pump body (12), a delivery pipe (13), and two sets of connecting pipes (14). The input end of the pump body (12) is connected to the lower part of the chamber, and the output end of the pump body (12) is connected to the water tank (11). The input end of the delivery pipe (13) is connected to the water tank (11), and the output end of the delivery pipe (13) is connected to the upper part of the chamber. The two sets of connecting pipes (14) are respectively connected to the water tank (11).

4. The power plant flue gas heat recovery device as described in claim 2, characterized in that, The conveying device includes a support shaft (15), a first spiral blade (16) and a motor (17). The support shaft (15) is rotatably mounted on the inner wall of the collection box (7), the first spiral blade (16) is mounted on the outer wall of the support shaft (15), and the motor (17) is mounted on the outer wall of the collection box (7). The output end of the motor (17) is connected to the support shaft (15).

5. The power plant flue gas heat recovery device as described in claim 1, characterized in that, It also includes a second helical blade (18), which is installed on the outer wall of the inner liner (2) and is disposed in the cavity.

6. The power plant flue gas heat recovery device as described in claim 1, characterized in that, It also includes a smoke exhaust pipe (19), which is installed at the top of the shell (1) and the bottom of the smoke exhaust pipe (19) is connected to the inner liner (2).

7. The power plant flue gas heat recovery device as described in claim 1, characterized in that, The outer wall of the shell (1) is provided with a heat insulation layer.

Images