Exhaust steam waste heat recovery device for deaerator of biomass power plant

Abstract

The utility model discloses a steam exhaust waste heat recovery device for a deaerator in a biomass power plant, which belongs to the technical field of biomass power plant equipment and comprises a recovery box, an inlet pipe is mounted on one side of the recovery box, an outlet pipe is mounted on the other side of the recovery box, and a limit ring is fixed inside the recovery box. A separation net is installed in the limiting ring, a heat exchange pipe is installed in the recycling box, and the two ends of the heat exchange pipe penetrate through and extend to the outer side of the recycling box. The recycling box, the inlet pipe, the outlet pipe, the heat exchange pipe, the flange, the separation net, the motor, the reciprocating screw rod, the gear, the limiting ring, the outer gear ring, the fixing rod and the cleaning plate are used in cooperation, impurities and water in exhaust steam can be isolated, the separation net is continuously cleaned and dredged through the cleaning plate, the exhaust steam is exhausted into the recycling box, and heat recovery and exchange are rapidly completed; therefore, the recovery efficiency of the exhaust steam waste heat recovery device for the deaerator of the biomass power plant is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of biomass power plant equipment, in particular to a deaerator exhaust waste heat recovery device for a biomass power plant. Background Art

[0002] The deaerator is one of the key equipment of boiler and heating system. The deaerator can make up water and spray it out in a spiral shape at a certain angle through the membrane tube to exchange heat with the heating steam for deoxygenation. The feed water is heated to the saturation temperature corresponding to the working pressure of the deaerator, and the oxygen and other gases dissolved in the feed water are removed to prevent and reduce the corrosion of the boiler feed water pipe, economizer and other auxiliary equipment. During the use of the deaerator, some exhaust steam needs to be discharged, and this part of the exhaust steam is generally discharged directly into the atmosphere, wasting a lot of heat energy.

[0003] For example, the utility model with application number 201920999567.2 discloses an exhaust steam recovery device for a deaerator. By arranging an air intake mechanism, a clamping mechanism and a water delivery device to cooperate with each other, the extra exhaust steam discharged from the deaerator is delivered into the box body, and the waste heat is used to heat the water in the curved water delivery pipe, thereby reducing energy waste.

[0004] Similar to the above application, there are still some shortcomings:

[0005] This exhaust recovery device for the deaerator exhausts steam into the box through the intake pipe to heat the curved pipe. First, the exhaust steam entering is transported in a concentrated position and is not uniform, which affects the heating of the pipe water. In addition, the impurities in the exhaust steam are not filtered, so that too many impurities in the exhaust steam can easily affect the exchange and recovery of heat.

[0006] Therefore, a biomass power plant deaerator exhaust waste heat recovery device is designed to optimize the above problems. Utility Model Content

[0007] The main purpose of the utility model is to provide a biomass power plant deaerator exhaust waste heat recovery device to solve the relevant technical problems raised in the above background technology.

[0008] The purpose of the utility model can be achieved by adopting the following technical solutions:

[0009] A waste heat recovery device for exhaust steam of a deaerator in a biomass power plant comprises a recovery box, an inlet pipe is installed on one side of the recovery box, an outlet pipe is installed on the other side of the recovery box, a limiting ring is fixed inside the recovery box, a separation net is installed inside the limiting ring, a heat exchange tube is installed inside the recovery box, and both ends of the heat exchange tube pass through and extend to the outside of the recovery box, flanges are installed on both ends of the heat exchange tube, a motor is installed on the side of the recovery box away from the outlet pipe, a reciprocating screw is fixed to the output shaft of the motor through a coupling, and one end of the reciprocating screw is rotatably connected to the inner side wall of the recovery box, a gear is fixed to the outside of the reciprocating screw, an outer gear ring is rotatably installed on one side of the limiting ring, a fixing rod is fixed inside the outer gear ring, and a cleaning plate is fixed on one side of the fixing rod.

[0010] Preferably: a guide block is fixed at one end of the inlet pipe, a guide groove is provided on a side of the guide block away from the inlet pipe, a diverter block is fixed inside the guide groove, and separation plates are evenly arranged between the diverter block and the guide groove.

[0011] Preferably: a sliding tube is slidably installed on the outer side of the reciprocating screw, a movable plate is fixed on the outer side of the sliding tube, and the outer side of the movable plate is slidably connected to the inner wall of the recovery box, a fixed tube is opened on one side of the movable plate, a conical ring is fixed inside the fixed tube, and the inside of the conical ring is slidably connected to the outer side of the heat exchange tube.

[0012] Preferably, a collecting trough is provided at the bottom of the recovery box, and a water hole is opened at the bottom of the recovery box.

[0013] Preferably: a reinforcement ring is provided at the connection between the outer side of the heat exchange tube and the recovery box, and the reinforcement pad is a high temperature resistant reinforcement ring.

[0014] Preferably: a mounting plate is fixed on the outer side of the guide block, and fixing bolts are arranged on the mounting plate.

[0015] The beneficial effects of the utility model are:

[0016] The utility model provides a biomass power plant deaerator exhaust steam waste heat recovery device, which can isolate impurities and moisture in the exhaust steam through the coordinated use of a recovery box, an inlet pipe, an outlet pipe, a heat exchange pipe, a flange, a separation net, a motor, a reciprocating screw, a gear, a limit ring, an external gear ring, a fixing rod and a cleaning plate, and continuously cleans and dredges the separation net through the cleaning plate, so that the exhaust steam can be more efficiently discharged into the recovery box to quickly complete the heat recovery exchange, thereby improving the recovery efficiency of the biomass power plant deaerator exhaust steam waste heat recovery device; through the coordinated use of a guide block, a guide groove, a diverter block and a separation plate, the exhaust steam enters the guide groove from the inlet pipe, and passes through the diverter block. The exhaust steam is blocked so that it is transported to the surroundings, and the exhaust steam is further evenly discharged to the recovery box through the separation of the separation plate, and then evenly contacts the outside of the heat exchange tube, making the heat exchange more uniform; through the coordinated use of the sliding tube, movable plate, fixed tube and conical ring, the reciprocating screw rotates under the limit of the heat exchange tube and the recovery box, while driving the movable plate and the sliding tube to move left and right, so that the fixed tube and the conical ring at the bottom of the sliding tube move, and the conical ring slides on the outside of the heat exchange tube while pushing the accumulated water and impurities on the outside of the heat exchange tube to be scraped off, so that the heat can more easily contact the water in the heat exchange tube, thereby improving the heat exchange efficiency between the heat exchange tube and the recovery box, thereby meeting people's usage needs. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a front cross-sectional view of the utility model;

[0018] Figure 2 For the utility model Figure 1 A magnified view of the structure at center;

[0019] Figure 3 It is a schematic diagram of the movable plate of the utility model;

[0020] Figure 4 It is a schematic diagram of a fixed pipe of the utility model.

[0021] In the figure: 1. Recovery box; 2. Inlet pipe; 3. Outlet pipe; 4. Heat exchange tube; 5. Flange; 6. Separation net; 7. Motor; 8. Reciprocating screw; 9. Gear; 10. Limit ring; 11. External gear ring; 12. Fixed rod; 13. Cleaning plate; 14. Guide block; 15. Guide groove; 16. Diverter block; 17. Separation plate; 18. Sliding pipe; 19. Movable plate; 20. Fixed pipe; 21. Conical ring. DETAILED DESCRIPTION

[0022] In order to make the technical solution of the utility model more clear and specific to those skilled in the art, the utility model is further described in detail below in conjunction with embodiments and drawings, but the implementation methods of the utility model are not limited thereto.

[0023] Embodiment 1

[0024] like Figure 1-Figure 4 As shown, this embodiment provides a waste heat recovery device for exhaust steam of a deaerator in a biomass power plant, including a recovery box 1, an inlet pipe 2 is installed on one side of the recovery box 1, an outlet pipe 3 is installed on the other side of the recovery box 1, a limiting ring 10 is fixed inside the recovery box 1, a separation net 6 is installed inside the limiting ring 10, a heat exchange tube 4 is installed inside the recovery box 1, and both ends of the heat exchange tube 4 pass through and extend to the outside of the recovery box 1, both ends of the heat exchange tube 4 are installed with flanges 5, a motor 7 is installed on the side of the recovery box 1 away from the outlet pipe 3, and the output shaft of the motor 7 is connected to the motor 7 by a coupling. A reciprocating screw 8 is fixed to the shaft, and one end of the reciprocating screw 8 is rotatably connected to the inner wall of the recovery box 1, a gear 9 is fixed to the outer side of the reciprocating screw 8, an outer gear ring 11 is rotatably installed on one side of the limit ring 10, a fixing rod 12 is fixed inside the outer gear ring 11, a cleaning plate 13 is fixed to one side of the fixing rod 12, a guide block 14 is fixed to one end of the inlet pipe 2, a guide groove 15 is provided on the side of the guide block 14 away from the inlet pipe 2, a diverter block 16 is fixed inside the guide groove 15, and separation plates 17 are evenly arranged between the diverter block 16 and the guide groove 15.

[0025] Through the coordinated use of the recovery box 1, the inlet pipe 2, the outlet pipe 3, the heat exchange tube 4, the flange 5, the separation net 6, the motor 7, the reciprocating screw 8, the gear 9, the limit ring 10, the outer gear ring 11, the fixed rod 12 and the cleaning plate 13, the exhaust steam is discharged into the recovery box 1 through the inlet pipe 2, the exhaust steam is filtered through the separation net 6 and then transported to the outside of the heat exchange tube 4, and heat exchange is performed on the water input into the heat exchange tube 4. The motor 7 is started to drive the reciprocating screw 8 and the gear 9 to rotate, and the cleaning plate 13 and the fixed rod 12 are driven to rotate through the gear 9, so that the cleaning plate 13 rotates at the same time and scrapes and cleans the water and impurities on the separation net 6, which can remove impurities and impurities in the exhaust steam. The water is isolated, and the separation net 6 is continuously cleaned and unblocked through the cleaning plate 13, so that the exhaust steam is more efficiently discharged into the recovery box 1 to quickly complete the heat recovery exchange, thereby improving the recovery efficiency of the exhaust heat recovery device of the deaerator of the biomass power plant; through the coordinated use of the guide block 14, the guide groove 15, the diverter block 16 and the separation plate 17, the exhaust steam enters the guide groove 15 from the inlet pipe 2, and is transported to the surroundings through the obstruction of the diverter block 16. The exhaust steam is further evenly discharged into the recovery box 1 to the surroundings through the separation of the separation plate 17, and then evenly contacts the outer side of the heat exchange tube 4, so that the heat exchange is more uniform.

[0026] Embodiment 2

[0027] In this embodiment, if Figure 1-Figure 4As shown, a sliding tube 18 is slidably installed on the outer side of the reciprocating screw 8, a movable plate 19 is fixed on the outer side of the sliding tube 18, and the outer side of the movable plate 19 is slidably connected to the inner wall of the recovery box 1, a fixed tube 20 is opened on one side of the movable plate 19, a conical ring 21 is fixed inside the fixed tube 20, and the inside of the conical ring 21 is slidably connected to the outer side of the heat exchange tube 4.

[0028] Through the coordinated use of the sliding tube 18, the movable plate 19, the fixed tube 20 and the conical ring 21, the reciprocating screw 8 rotates under the limit of the heat exchange tube 4 and the recovery box 1, while driving the movable plate 19 and the sliding tube 18 to move left and right, so that the fixed tube 20 and the conical ring 21 at the bottom of the sliding tube 18 move, and the conical ring 21 slides on the outside of the heat exchange tube 4 and pushes the accumulated water and impurities on the outside of the heat exchange tube 4 to be scraped off, so that the heat can more easily contact the water in the heat exchange tube 4, thereby improving the heat exchange efficiency between the heat exchange tube 4 and the recovery box 1, thereby meeting people's usage needs.

[0029] In this embodiment, a collecting groove is provided at the bottom of the recovery box 1 , and a water hole is opened at the bottom of the recovery box 1 .

[0030] The collection groove and the water holes facilitate the collection of water in the exhaust steam after separation, thus facilitating the treatment of the water.

[0031] In this embodiment, a reinforcement ring is provided at the connection between the outer side of the heat exchange tube 4 and the recovery box 1, and the reinforcement pad is a high temperature resistant reinforcement ring.

[0032] The high temperature resistant reinforcement ring increases the sealing between the recovery box 1 and the heat exchange tube 4 to avoid heat loss.

[0033] In this embodiment, a mounting plate is fixed to the outer side of the guide block 14, and fixing bolts are provided on the mounting plate.

[0034] The guide block 14 can be easily disassembled and replaced by the mounting plate and the fixing bolts, thus facilitating maintenance work.

[0035] The above is only a further embodiment of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes within the scope disclosed by the present invention according to the technical solution and concept of the present invention, which fall within the protection scope of the present invention.

Claims

1. A biomass power plant deaerator exhaust heat recovery device, characterized by: The invention comprises a recovery box (1), wherein an inlet pipe (2) is installed on one side of the recovery box (1), an outlet pipe (3) is installed on the other side of the recovery box (1), a limiting ring (10) is fixed inside the recovery box (1), a separation net (6) is installed inside the limiting ring (10), a heat exchange tube (4) is installed inside the recovery box (1), and both ends of the heat exchange tube (4) penetrate and extend to the outside of the recovery box (1), and both ends of the heat exchange tube (4) are installed with flanges (5), and the recovery box (1) A motor (7) is installed on the side away from the outlet pipe (3), the output shaft of the motor (7) is fixed with a reciprocating screw (8) through a coupling, and one end of the reciprocating screw (8) is rotatably connected to the inner wall of the recovery box (1), a gear (9) is fixed on the outer side of the reciprocating screw (8), an outer gear ring (11) is rotatably installed on one side of the limit ring (10), a fixing rod (12) is fixed inside the outer gear ring (11), and a cleaning plate (13) is fixed on one side of the fixing rod (12).

2. The exhaust heat recovery device of a deaerator of a biomass power plant according to claim 1 is characterized in that: A guide block (14) is fixed to one end of the inlet pipe (2), a guide groove (15) is provided on a side of the guide block (14) away from the inlet pipe (2), a diverter block (16) is fixed inside the diverter groove (15), and a separation plate (17) is evenly arranged between the diverter block (16) and the guide groove (15).

3. The exhaust heat recovery device of a deaerator of a biomass power plant according to claim 1 is characterized in that: A sliding tube (18) is slidably mounted on the outer side of the reciprocating screw (8), a movable plate (19) is fixed on the outer side of the sliding tube (18), and the outer side of the movable plate (19) is slidably connected to the inner wall of the recovery box (1), a fixed tube (20) is opened on one side of the movable plate (19), a conical ring (21) is fixed inside the fixed tube (20), and the inside of the conical ring (21) is slidably connected to the outer side of the heat exchange tube (4).

4. The exhaust heat recovery device of a deaerator of a biomass power plant according to claim 1, characterized in that: The bottom of the recovery box (1) is provided with a collecting trough, and the bottom of the recovery box (1) is provided with a water through hole.

5. The exhaust heat recovery device of a deaerator of a biomass power plant according to claim 1, characterized in that: A reinforcement ring is provided at the connection between the outer side of the heat exchange tube (4) and the recovery box (1), and the reinforcement pad is a high temperature resistant reinforcement ring.

6. The exhaust heat recovery device of a deaerator of a biomass power plant according to claim 2, characterized in that: A mounting plate is fixed on the outer side of the guide block (14), and fixing bolts are arranged on the mounting plate.

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