A waste heat recovery device for flue gas desulfurization tower

Abstract

This utility model discloses a waste heat recovery device for a flue gas desulfurization tower, relating to the field of waste heat recovery, including a tank; a flue gas inlet pipe is fixedly connected to one side of the tank, and a baffle is installed inside the tank, which divides the inner cavity of the tank into an upper chamber and a lower chamber. Several flue gas outlets are provided on the baffle, and several heat exchange tubes are installed inside the tank. A flue gas guide is fixedly installed on the baffle, and the lower chamber is connected to the inside of the flue gas guide through several flue gas outlets. Several baffles are staggered inside the flue gas guide. A flue gas hood is installed at the top of the tank, and the upper chamber is connected to the flue gas hood. An exhaust pipe is connected to the top of the flue gas hood. This invention effectively solves the technical problems of existing waste heat recovery devices for desulfurization towers, where the flue gas does not have enough time to contact the heat exchange tubes, and there is a lack of cleaning components for cleaning the heat exchange tubes, making it easy for dust to adhere to the heat exchange tubes, affecting the heat exchange effect and resulting in low heat exchange efficiency.

Description

Technical Field

[0001] This utility model relates to the field of waste heat recovery, specifically a waste heat recovery device for a flue gas desulfurization tower. Background Technology

[0002] A desulfurization tower is a device used to treat industrial flue gas in order to reduce its pollution to the environment. By preparing different reagents, it can simultaneously achieve the functions of dust removal, desulfurization, and denitrification.

[0003] In current technologies, desulfurization towers are equipped with atomizing mechanisms. A centrifugal pump pumps the desulfurizing agent from the bottom of the tower to these mechanisms, which then generate atomized desulfurizing agent. This atomized agent mixes with the flue gas to absorb sulfur dioxide, thus achieving flue gas desulfurization. The desulfurizing agent is generally composed of a mixture of water and lime. A mixing mechanism is installed at the bottom of the tower to agitate the desulfurizing agent, ensuring proper mixing of lime and the agent. Since the flue gas emitted from the desulfurization tower is at a high temperature and contains a large amount of heat, direct emission would waste this heat and resources. Therefore, waste heat recovery devices are typically installed.

[0004] However, in existing waste heat recovery devices for desulfurization towers, the flue gas does not have enough time to contact the heat exchange tubes, resulting in poor heat exchange efficiency. Furthermore, the lack of cleaning components for cleaning the heat exchange tubes makes it easy for dust and impurities to adhere to the tubes, thus affecting heat exchange and leading to low heat exchange efficiency. Utility Model Content

[0005] To address the shortcomings of existing technologies, this utility model provides a waste heat recovery device for flue gas desulfurization towers, which solves the technical problems mentioned in the background section.

[0006] To achieve the above objectives, this utility model provides the following technical solution: a waste heat recovery device for a flue gas desulfurization tower, comprising a tank; a flue gas inlet pipe is fixedly connected to one side of the tank, a baffle is installed inside the tank, which divides the inner cavity of the tank into an upper chamber and a lower chamber, a plurality of flue gas outlets are provided on the baffle, a plurality of heat exchange tubes are provided inside the tank, a flue gas guide is fixedly provided on the baffle, the lower chamber is connected to the inside of the flue gas guide through a plurality of flue gas outlets, a plurality of baffles are staggered inside the flue gas guide, a flue gas hood is provided on the top of the tank, the upper chamber is connected to the flue gas hood, and an exhaust pipe is connected to the top of the flue gas hood.

[0007] Preferably, the top of the tank is provided with a water inlet groove, the tops of the plurality of heat exchange tubes are all connected to the water inlet groove, a water storage tank is provided in the lower chamber, and the bottoms of the plurality of heat exchange tubes are all connected to the water storage tank.

[0008] Preferably, each of the heat exchange tubes is rotatably mounted with a driven pulley at its top, and a scraper is mounted at the bottom of each driven pulley. The scraper is in contact with the surface of the heat exchange tube, and a drive assembly for driving the scrapers to rotate is mounted on the tank body.

[0009] Preferably, the drive assembly includes a motor, the drive end of which passes through the top of the tank and is fixedly mounted with a drive pulley. The drive pulley is connected to a driven pulley on one side of it and to two adjacent driven pulleys via belt drive.

[0010] Preferably, the water inlet tank is connected to a water inlet pipe, and the water storage tank is connected to a drain pipe.

[0011] Preferably, the partition plate has a slag discharge port, and a plurality of heat exchange tubes pass through the slag discharge port, the diameter of the slag discharge port being larger than the diameter of the heat exchange tubes.

[0012] Preferably, a guide block is provided on the top of the water storage tank, and the guide block is pointed.

[0013] Preferably, the tank body and the fume hood are connected by a plurality of vent pipes.

[0014] Preferably, a filter plate is detachably installed inside the smoke inlet pipe.

[0015] Beneficial effects

[0016] This utility model provides a waste heat recovery device for flue gas desulfurization towers, which has the following beneficial effects:

[0017] 1. The system is equipped with a flue pipe, through which flue gas can be discharged into the tank. The internal chamber of the tank is divided into an upper chamber and a lower chamber by a baffle plate. The flue gas in the lower chamber can enter the flue gas guide pipe through the flue gas outlet. The flue gas rises along the flue gas guide pipe. The baffle plate can block the flue gas, prolong the flue gas rising time, and increase the contact time between the flue gas and the heat exchange tube, which can achieve a better heat exchange effect and effectively avoid the direct discharge of flue gas, which would cause heat waste.

[0018] 2. The system is equipped with a motor. When the motor is started, the motor drive end rotates, which drives the active pulley to rotate. The active pulley, connected to the belt drive, drives the belt drive, which in turn drives a driven pulley to rotate. Similarly, it drives several driven pulleys to rotate. The driven pulleys, when rotated, drive the scrapers to rotate. The scrapers clean impurities from the surface of the heat exchange tubes, thus preventing impurities from the flue gas from adhering to the outer surface of the heat exchange tubes and affecting the heat exchange efficiency. Attached Figure Description

[0019] Figure 1 This is a front view of the internal structure of this utility model;

[0020] Figure 2 for Figure 1 Enlarged diagram of A in the middle;

[0021] Figure 3 for Figure 1 Enlarged diagram of B in the diagram.

[0022] In the diagram: 1. Tank; 2. Heat exchange tube; 3. Baffle; 4. Water storage tank; 5. Smoke guide; 6. Baffle; 7. Smoke outlet; 8. Water inlet; 9. Smoke hood; 10. Gas outlet pipe; 11. Smoke inlet pipe; 12. Driven pulley; 13. Belt; 14. Drive pulley; 15. Motor; 16. Filter plate; 17. Drain pipe; 18. Water inlet pipe; 19. Exhaust pipe; 20. Scraper; 21. Guide block. Detailed Implementation

[0023] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Wherein, directional terms such as "upper" and "lower" mentioned herein are used in conjunction with... Figure 1 The orientation is used as a reference.

[0024] Please see Figure 1-2 This utility model provides a technical solution: a waste heat recovery device for a flue gas desulfurization tower, including a tank 1; a flue gas inlet pipe 11 is fixedly connected to one side of the tank 1, a partition 3 is installed inside the tank 1, the partition 3 can divide the inner cavity of the tank 1 into an upper cavity and a lower cavity, a plurality of flue gas outlets 7 are provided on the partition 3, a plurality of heat exchange tubes 2 are provided inside the tank 1, a flue gas guide 5 is fixedly provided on the partition 3, the lower cavity is connected to the inside of the flue gas guide 5 through a plurality of flue gas outlets 7, a plurality of baffles 6 are staggered inside the flue gas guide 5, a flue gas hood 9 is provided on the top of the tank 1, the upper cavity is connected to the flue gas hood 9, and an exhaust pipe 19 is connected to the top of the flue gas hood 9.

[0025] The flue gas is discharged into the tank 1 through the flue gas inlet pipe 11. The internal chamber of the tank 1 is divided into an upper chamber and a lower chamber by the baffle 3. The flue gas in the lower chamber can enter the flue gas guide pipe 5 through the flue gas outlet 7. The flue gas rises along the flue gas guide pipe 5. The baffle 6 can block the flue gas, prolong the rise time of the flue gas, and increase the contact time between the flue gas and the heat exchange tube 2, so as to achieve a better heat exchange effect and effectively avoid the direct discharge of flue gas, which would cause heat waste. The exhaust hood 9 can collect the heat exchanged gas into the exhaust hood 9 and discharge it outside the device together.

[0026] Furthermore, a water inlet trough 8 is provided at the top of the tank body 1, and the tops of several heat exchange tubes 2 are connected to the water inlet trough 8. A water storage tank 4 is provided in the lower chamber, and the bottoms of several heat exchange tubes 2 are connected to the water storage tank 4.

[0027] By providing an inlet tank 8, external water can be introduced into the inlet tank 8. The water in the inlet tank 8 can enter several heat exchange tubes 2. By providing a storage tank, the water in the heat exchange tubes 2 can flow into the storage tank after heat exchange is completed.

[0028] Furthermore, each of the heat exchange tubes 2 has a driven pulley 12 rotatably mounted on its top, and a scraper 20 is mounted on the bottom of each driven pulley 12. The scraper 20 is in contact with the surface of the heat exchange tube 2, and a drive assembly for driving the scraper 20 to rotate is mounted on the tank body 1.

[0029] By providing driven pulleys 12, the rotation of several driven pulleys 12 can drive the scraper 20 to rotate. By installing several scrapers 20, the rotation of the scrapers 20 can clean the impurities on the surface of the heat exchange tube 2, thereby preventing impurities in the flue gas from adhering to the outer surface of the heat exchange tube 2 and affecting the heat exchange efficiency.

[0030] Furthermore, the drive assembly includes a motor 15, the drive end of which passes through the top of the tank 1 and is fixedly mounted with a drive pulley 14. The drive pulley 14 is connected to a driven pulley 12 on one side of it, as well as to two adjacent driven pulleys 12, by a belt 13.

[0031] The motor 15 is installed and started. The motor 15 drives the drive pulley 14 to rotate. The drive pulley 14 rotates and is connected to the belt 13, which drives the belt 13 to rotate, thereby driving one driven pulley 12 to rotate. Similarly, it can drive several driven pulleys 12 to rotate.

[0032] Furthermore, a slag discharge port is provided on the partition plate 3, and several heat exchange tubes 2 pass through the slag discharge port, the diameter of which is larger than the diameter of the heat exchange tubes 2.

[0033] With the impurity discharge port provided, the scraper 20 can clean the impurities falling from the heat exchange tube 2, which can then fall through the discharge port.

[0034] Furthermore, a guide block 21 is provided on the top of the water storage tank 4, and the guide block 21 is pointed.

[0035] With the guide block 21 provided, impurities can fall along the guide block 21 to the bottom of the tank 1, and then be discharged from the bottom discharge hole.

[0036] Furthermore, the tank body 1 and the fume hood 9 are connected by several vent pipes 10.

[0037] By providing an exhaust pipe 10, the flue gas after heat exchange can enter the exhaust hood 9 through the exhaust pipe 10.

[0038] Furthermore, a filter plate 16 is disassembled and installed inside the flue duct 11.

[0039] By installing the filter plate 16, the flue gas entering the tank 1 can be filtered first, thereby preventing excessive impurities in the flue gas from adhering to the heat exchange tube 2 and affecting the heat exchange efficiency.

[0040] Those skilled in the art should connect all electrical components and their compatible power supplies in this case via wires, and should select appropriate controllers according to actual conditions to meet control requirements. The specific connection and control sequence should refer to the working principle described below, where the electrical connections between the various electrical components are completed in sequence. The detailed connection methods are well-known technologies in the field. The following mainly introduces the working principle and process, and will not describe the electrical control further.

[0041] The working principle and usage process of this utility model are as follows: In use, water is introduced into the water inlet tank 8 through the water inlet pipe 18, and then into the heat exchange tube 2. Flue gas is introduced into the flue gas inlet pipe 11, filtered by the filter plate 16, and then introduced into the tank 1. The flue gas then enters the flue gas guide pipe 5 through the flue gas outlet 7, flows through several baffles 6, and then enters the exhaust hood 9 through the exhaust pipe 10. The gas after heat exchange is discharged through the exhaust pipe 19. The motor 15 is started, and the drive end of the motor 15 rotates, driving the drive pulley 14 to rotate. Through the belt 13, it drives several driven pulleys 12 to rotate, thereby driving the scraper 20 to rotate and scrape off the dust and impurities adhering to the surface of the heat exchange tube 2. The impurities fall into the lower chamber through the impurity discharge port, and then can be discharged through the impurity discharge hole along the guide block 21. Each heat exchange tube 2 is equipped with a valve. Opening the valve can release the water in the heat exchange tube 2 into the water storage tank 4, and then discharge it through the drain pipe 17.

[0042] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A waste heat recovery device for a flue gas desulfurization tower, characterized in that, The tank includes a tank body (1); a smoke inlet pipe (11) is fixedly connected to one side of the tank body (1), a partition (3) is installed inside the tank body (1), the partition (3) can divide the inner cavity of the tank body (1) into an upper cavity and a lower cavity, a number of smoke outlets (7) are opened on the partition (3), a number of heat exchange tubes (2) are installed inside the tank body (1), a smoke guide (5) is fixedly installed on the partition (3), the lower cavity is connected to the inside of the smoke guide (5) through a number of smoke outlets (7), a number of baffles (6) are staggered inside the smoke guide (5), a smoke exhaust hood (9) is installed on the top of the tank body (1), the upper cavity is connected to the smoke exhaust hood (9), and an exhaust pipe (19) is connected to the top of the smoke exhaust hood (9).

2. The waste heat recovery device for a flue gas desulfurization tower according to claim 1, characterized in that, The tank (1) has a water inlet trough (8) at the top, and the tops of several heat exchange tubes (2) are connected to the water inlet trough (8). A water storage tank (4) is provided in the lower chamber, and the bottoms of several heat exchange tubes (2) are connected to the water storage tank (4).

3. The waste heat recovery device for a flue gas desulfurization tower according to claim 1, characterized in that, Each of the heat exchange tubes (2) is rotatably mounted with a driven pulley (12) at its top, and a scraper (20) is mounted at the bottom of each driven pulley (12). The scraper (20) is in contact with the surface of the heat exchange tube (2), and a drive assembly for driving the scraper (20) to rotate is mounted on the tank body (1).

4. The waste heat recovery device for a flue gas desulfurization tower according to claim 3, characterized in that, The drive assembly includes a motor (15), the drive end of which passes through the top of the tank (1) and is fixedly mounted with a drive pulley (14). The drive pulley (14) is connected to a driven pulley (12) near its side and to two adjacent driven pulleys (12) by a belt (13).

5. A waste heat recovery device for a flue gas desulfurization tower according to claim 2, characterized in that, The water inlet tank (8) is connected to a water inlet pipe (18), and the water storage tank (4) is connected to a drain pipe (17).

6. The waste heat recovery device for a flue gas desulfurization tower according to claim 1, characterized in that, The partition plate (3) has a discharge port, and several heat exchange tubes (2) pass through the discharge port. The diameter of the discharge port is larger than the diameter of the heat exchange tubes (2).

7. A waste heat recovery device for a flue gas desulfurization tower according to claim 2, characterized in that, The top of the water storage tank (4) is provided with a guide block (21), which is pointed.

8. The waste heat recovery device for a flue gas desulfurization tower according to claim 1, characterized in that, The tank (1) and the fume hood (9) are connected by several vent pipes (10).

9. A waste heat recovery device for a flue gas desulfurization tower according to claim 1, characterized in that, A filter plate (16) is disassembled and installed inside the smoke inlet pipe (11).

Images