A lime slurry pump for flue gas desulfurization

Abstract

The utility model relates to a lime slurry pump for flue gas desulfurization, including base, set up on base motor, pump body subassembly, the output shaft of motor is connected with pump body subassembly transmission through pivot, the shell of motor has multiple water channels in the annular distribution along the axial direction, the one end of each water channel is connected through the water inlet ring, the other end is connected through the water outlet ring, one end of motor is equipped with the support, the fan that is connected with motor output shaft transmission is rotatably equipped in the support, the fixed mounting of heat dissipation water tank is located in one side of fan on the support, the water inlet, the backwater mouth are equipped on heat dissipation water tank respectively, the water inlet is connected through the water pipe with the water inlet ring, is equipped with cooling water pump on the water pipe, the backwater mouth is connected through the backwater pipe with the water outlet ring, through setting up water channel in the motor shell, the motor core heating component is all -round cooling, simultaneously, the cooling water pump drives the cooling liquid to circulate, the fan of synchronous drive of motor output shaft is combined to the heat dissipation water tank forced heat dissipation, constitutes the high -efficient heat dissipation closed loop.

Description

Technical Field

[0001] This utility model relates to the field of lime slurry pump technology, specifically to a lime slurry pump used for flue gas desulfurization. Background Technology

[0002] Waste-to-energy flue gas desulfurization is an environmentally friendly process that removes SO2 from the flue gas containing harmful components such as sulfur dioxide (SO2) generated during waste incineration power generation. This is achieved through specific technologies, using an absorbent (such as lime slurry) to react with the SO2 in the flue gas, thus ensuring that the flue gas meets emission standards. In this process, the core function of the lime slurry pump is to stably and continuously deliver the prepared lime slurry to the desulfurization absorption tower, ensuring sufficient contact between the lime slurry and the flue gas inside the tower. This allows for the absorption of SO2 through a chemical reaction, making it a crucial piece of equipment for ensuring the normal operation of the desulfurization reaction.

[0003] Because lime slurry has a certain concentration and viscosity, it faces significant resistance during transport. To ensure continuous desulfurization operation, the pump needs to operate at full load for extended periods. The motor's continuous high-power output generates a large amount of heat. In addition, the ambient temperature around the waste incineration system is high due to the residual heat from the flue gas, which hinders the motor's natural heat dissipation. This results in the motor's heat not being dissipated in time, leading to continuous heat accumulation and high temperatures. This accelerates the aging of the motor's internal insulation materials, reduces its insulation performance, shortens its service life, and in severe cases, directly burns out the motor, causing the pump to shut down. Furthermore, high temperatures can damage the pump's seals (such as sealing rings), causing lime slurry leakage. This not only pollutes the environment but also affects desulfurization efficiency due to insufficient absorbent supply. Utility Model Content

[0004] In view of the shortcomings of the existing technology, the purpose of this utility model is to provide a lime slurry pump for flue gas desulfurization.

[0005] The objective of this utility model can be achieved through the following technical solution: A lime slurry pump for flue gas desulfurization includes a base, a motor mounted on the base, and a pump body assembly. The output shaft of the motor is connected to the pump body assembly via a rotating shaft. Multiple water channels are distributed in a ring along the axial direction inside the motor housing. One end of each water channel is connected through an inlet ring, and the other end is connected through an outlet ring. A bracket is installed at one end of the motor. A fan that is rotatably connected to the output shaft of the motor is mounted inside the bracket. A cooling water tank is fixedly installed on the bracket on one side of the fan. The cooling water tank is provided with an inlet and a return water inlet. The inlet is connected to the inlet ring via a water supply pipe. A cooling water pump is installed on the water supply pipe. The return water inlet is connected to the outlet ring via a return water pipe.

[0006] Preferably, the pump body assembly includes a volute consisting of a first housing and a second housing, with an inlet and an outlet on the volute, and a matching inner housing inside the volute. An impeller connected to the rotating shaft is rotatably mounted inside the inner housing, and a sealing plate is provided on the side of the inner housing away from the inlet.

[0007] Preferably, the system also includes a controller, with differential pressure sensors installed at the inlet and outlet, and the differential pressure sensors and motor are electrically connected to the controller.

[0008] Preferably, a pressure relief assembly is installed on the radiator.

[0009] Preferably, the pressure relief assembly includes a valve body, which is provided with an air inlet and a pressure relief hole. Multiple guide bars are provided inside the valve body, and pressure plates are movably mounted on the guide bars. A spring is provided at the bottom of the pressure plate, and a valve core is provided at one end of the spring to abut against the air inlet. The valve core is movably connected to the guide bars, and an adjusting screw is threadedly connected to the top of the valve body. One end of the adjusting screw is rotatably connected to the pressure plate.

[0010] The beneficial effects of this utility model are as follows: By setting multiple annularly distributed water channels inside the motor housing, and forming an internal cooling passage with the inlet and outlet rings, the core heat-generating components of the motor can be cooled in an all-round and uniform manner, avoiding local overheating. At the same time, the cooling water pump drives the coolant to circulate between the radiator tank, water supply pipe, inlet ring, water channels, outlet ring, and return pipe. Combined with the fan synchronously driven by the motor output shaft to force heat dissipation from the radiator tank, a highly efficient heat dissipation closed loop is formed, which can quickly remove the large amount of heat generated by the motor operation, ensuring that the motor always maintains a suitable operating temperature under the high temperature and high load environment of flue gas desulfurization, significantly improving the motor's operational stability and service life. Attached Figure Description

[0011] The present invention will be further described with reference to the accompanying drawings, but the embodiments in the drawings do not constitute any limitation on the present invention. For those skilled in the art, other drawings can be obtained based on the following drawings without creative effort.

[0012] Figure 1 This is a schematic diagram of the structure of a lime slurry pump for flue gas desulfurization according to the present invention.

[0013] Figure 2 This is a schematic diagram of the pump body assembly structure of a lime slurry pump for flue gas desulfurization according to the present invention.

[0014] Figure 3 This is a schematic diagram of the waterway structure of a lime slurry pump for flue gas desulfurization according to the present invention.

[0015] Figure 4 This is a schematic diagram of the pressure relief component of a lime slurry pump for flue gas desulfurization according to the present invention.

[0016] The labels in the diagram represent: 1. Base; 2. Motor; 3. Pump body assembly; 4. Shaft; 5. Water channel; 6. Inlet ring; 7. Outlet ring; 8. Bracket; 9. Fan; 10. Cooling water tank; 11. Inlet; 12. Outlet; 13. Cooling water pump; 14. First housing; 15. Second housing; 16. Volute; 17. Inlet; 18. Outlet; 19. Inner housing; 20. Impeller; 21. Sealing plate; 22. Pressure relief assembly; 23. Valve body; 24. Air inlet; 25. Pressure relief hole; 26. Guide bar; 27. Pressure plate; 28. Spring; 29. ​​Valve core; 30. Adjusting screw; 31. Differential pressure sensor. Detailed Implementation

[0017] It should be noted that if the embodiments of this utility model involve directional indicators (such as up, down, left, right, front, back, etc.), the directional indicators are only used to explain the relative positional relationship and movement of the components in a certain specific posture (as shown in the figure). If the specific posture changes, the directional indicators will also change accordingly.

[0018] Furthermore, if the embodiments of this utility model involve descriptions such as "first" or "second," these descriptions are for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of indicated technical features. Therefore, features defined with "first" or "second" may explicitly or implicitly include at least one of those features. Additionally, the technical solutions of the various embodiments can be combined with each other, but this must be based on the ability of those skilled in the art to implement them. If the combination of technical solutions is contradictory or impossible to implement, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection claimed by this utility model.

[0019] The technical solution of this utility model will be clearly and completely described below with reference to specific embodiments. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0020] See Figures 1 to 4As shown, the structure of this utility model is as follows: a lime slurry pump for flue gas desulfurization includes a base 1, a motor 2 mounted on the base 1, and a pump body assembly 3. The output shaft of the motor 2 is connected to the pump body assembly 3 via a rotating shaft 4. Multiple water channels 5 are arranged annularly along the axial direction inside the housing of the motor 2. One end of each water channel 5 is connected via an inlet ring 6, and the other end is connected via an outlet ring 7. A bracket 8 is mounted on one end of the motor 2. A fan 9, which is rotatably connected to the output shaft of the motor 2, is mounted inside the bracket 8. A cooling water tank 10 is fixedly mounted on the bracket 8 on one side of the fan 9. The cooling water tank 10 is provided with an inlet 11 and an outlet 11. 12. The inlet 11 is connected to the inlet ring 6 through a water supply pipe. A cooling water pump 13 is installed on the water supply pipe. The return outlet 12 is connected to the outlet ring 7 through a return pipe. Specifically, the motor 2 serves as a power source and transmits torque to the pump body assembly 3 through the rotating shaft 4, driving it to complete the intake and discharge of lime slurry. During the operation of the motor 2, the windings and other components will generate a large amount of heat due to electromagnetic induction and mechanical friction. Therefore, multiple water channels 5 distributed in a ring along the axial direction inside the motor 2 housing form an efficient internal cooling path. These water channels 5 evenly surround the core heat-generating components of the motor 2, allowing them to contact and absorb heat from all directions, thus avoiding local overheating. The inlet ring 6 is connected to one end of each water channel 5, which can evenly distribute the coolant to each water channel 5 to ensure the consistency of the cooling effect. The outlet ring 7 is connected to the other end of the water channel 5, which collects the coolant after absorbing heat to form a complete internal circulation path. The radiator tank 10 stores the coolant, and the cooling water pump 13 provides power for the circulation. The low-temperature coolant in the tank is pumped into the inlet ring 6 through the water pipe. After being distributed by the inlet ring 6, it enters each water channel 5 to absorb the heat of the motor 2. The heated coolant is collected through the outlet ring 7 and then flows back to the radiator tank 10 through the return water pipe to complete the circulation. Simultaneously, while driving the pump body assembly 3, the output shaft of motor 2 also drives the fan 9 on the bracket 8 to rotate. The fan 9 blows air directly onto the cooling water tank 10, accelerating the airflow on the surface of the tank. Through forced convection, the heat of the coolant in the tank is dissipated to the surrounding environment, allowing the coolant to recirculate after cooling, forming a continuous and efficient heat dissipation closed loop. This can quickly remove the heat generated by motor 2, ensuring that motor 2 maintains a suitable operating temperature under high temperature and high load flue gas desulfurization conditions, significantly extending the service life of motor 2, ensuring the continuous and stable operation of the lime slurry pump, and thus maintaining the normal operating conditions of the flue gas desulfurization system.

[0021] like Figure 1As shown, the pump body assembly 3 includes a volute 16 composed of a first housing 14 and a second housing 15. The volute 16 has an inlet 17 and an outlet 18. An inner housing 19 is provided inside the volute 16. An impeller 20, which is rotatably connected to the rotating shaft 4, is provided inside the inner housing 19. A sealing plate 21 is provided on the side of the inner housing 19 away from the inlet 17. Specifically, the inner housing 19 is adapted to the inside of the volute 16 and can resist the corrosion and wear of lime slurry, protecting the volute 16 from damage. The impeller 20 rotates at high speed under the drive of the rotating shaft 4, and uses centrifugal force to pressurize the lime slurry entering from the inlet 17, causing the lime slurry to flow along the internal channel of the volute 16 and be discharged from the outlet 18. After the first housing 14 and the second housing 15 are fastened and locked, the sealing plate 21 and the inner housing 19 are firmly abutted to achieve a seal, reducing the leakage of lime slurry during the transportation process.

[0022] Furthermore, the system also includes a controller. Differential pressure sensors 31 are installed at the inlet 17 and outlet 18. The differential pressure sensors 31 and the motor 2 are electrically connected to the controller. Specifically, the differential pressure sensors 31 monitor the pressure difference between the inlet 17 and outlet 18 in real time and transmit the detection signal to the controller. By analyzing the changes in the pressure difference, the controller can determine whether there are any abnormal conditions such as blockages or impeller 20 wear inside the pump assembly 3. When the pressure difference exceeds the preset normal range, the controller will promptly adjust the motor 2, such as reducing the speed or stopping operation, thereby preventing further damage to the equipment due to abnormal operating conditions and ensuring the safe operation of the pump.

[0023] like Figure 1 As shown, a pressure relief component 22 is installed on the radiator 10. Specifically, when the pressure inside the radiator 10 increases due to the heat of the coolant and exceeds the safety threshold, the pressure relief component 22 will automatically open to release the excess pressure, preventing the radiator 10 from being damaged due to excessive pressure or the connection of each pipe from bulging and collapsing, and ensuring that the cooling system operates stably within the safe pressure range.

[0024] like Figure 4As shown, the pressure relief assembly 22 includes a valve body 23, which has an air inlet 24 and a pressure relief hole 25. Multiple guide bars 26 are located inside the valve body 23, and pressure plates 27 are movably mounted on the guide bars 26. A spring 28 is located at the bottom of the pressure plate 27, and a valve core 29 abuts against the air inlet 24 at one end of the spring 28. The valve core 29 is movably connected to the guide bars 26. An adjusting screw 30 is threadedly connected to the top of the valve body 23, and one end of the adjusting screw 30 is rotatably connected to the pressure plate 27. Specifically, when the pressure inside the radiator tank 10 exceeds a set value, the pressure acts on the valve core 29 through the air inlet 24, pushing the valve core 29 upward against the spring force of the spring 28, connecting the air inlet 24 with the pressure relief hole 25, thereby releasing excess pressure in the tank. When the pressure drops to a safe range, the spring force of the spring 28 pushes the valve core 29 back to its original position, closing the passage between the air inlet 24 and the pressure relief hole 25, and stopping the pressure relief. The guide bar 26 guides the movement of the valve core 29 and the pressure plate 27, ensuring their stable movement. By rotating the adjusting screw 30, the pressure on the pressure plate 27 can be changed, thereby adjusting the preload of the spring 28 and achieving precise setting of the pressure relief value to adapt to the pressure requirements under different working conditions.

[0025] In practical use, during operation, motor 2 starts as the power source, and its output shaft drives the pump assembly 3 through the rotating shaft 4 to complete the intake and discharge of lime slurry. At the same time, the output shaft of motor 2 synchronously drives the fan 9 on the bracket 8 to rotate, and the fan 9 continuously blows air onto the heat dissipation tank 10 to accelerate the airflow on its surface. The heat generated by the operation of motor 2 is handled by multiple water channels 5 distributed in a ring inside the casing: cooling water pump 13 starts, pumping the low-temperature coolant in the heat dissipation tank 10 into the inlet ring 6 through the water supply pipe. The inlet ring 6 evenly distributes the coolant to each water channel 5. After absorbing the heat of motor 2 during the flow of the coolant in the water channels 5, the coolant collects in the outlet ring 7 and flows back to the heat dissipation tank 10 through the return water pipe. During this process, the fan 9 dissipates the heat absorbed by the coolant in the heat dissipation tank 10 into the environment through forced convection, so that the coolant is cooled down and re-enters the circulation, achieving continuous and efficient cooling of motor 2 and ensuring stable operation of the equipment.

[0026] The present invention has been further described above with reference to specific embodiments. However, it should be understood that the specific description herein should not be construed as limiting the substance and scope of the present invention. Various modifications made by those skilled in the art to the above embodiments after reading this specification are all within the scope of protection of the present invention.

Claims

1. A lime slurry pump for flue gas desulfurization, characterized in that: The device includes a base (1), a motor (2) mounted on the base (1), and a pump assembly (3). The output shaft of the motor (2) is connected to the pump assembly (3) via a rotating shaft (4). The housing of the motor (2) has multiple water channels (5) arranged in a ring along the axial direction. One end of each water channel (5) is connected through an inlet ring (6), and the other end is connected through an outlet ring (7). A bracket (8) is installed at one end of the motor (2). A fan (9) connected to the output shaft of the motor (2) is rotatably mounted inside the bracket (8). A heat dissipation tank (10) is fixedly mounted on one side of the fan (9) on the bracket (8). The heat dissipation tank (10) is provided with an inlet (11) and a return water inlet (12). The inlet (11) is connected to the inlet ring (6) via a water supply pipe. A cooling water pump (13) is provided on the water supply pipe. The return water inlet (12) is connected to the outlet ring (7) via a return water pipe.

2. The lime slurry pump for flue gas desulfurization according to claim 1, characterized in that: The pump body assembly (3) includes a volute (16) composed of a first housing (14) and a second housing (15). The volute (16) has an inlet (17) and an outlet (18) respectively. The volute (16) is provided with a suitable inner shell (19). The inner shell (19) is rotatably provided with an impeller (20) that is connected to the rotating shaft (4). The inner shell (19) is provided with a sealing plate (21) on the side away from the inlet (17).

3. The lime slurry pump for flue gas desulfurization according to claim 2, characterized in that: It also includes a controller, and differential pressure sensors (31) are installed at the inlet (17) and outlet (18). The differential pressure sensors (31) and the motor (2) are electrically connected to the controller.

4. The lime slurry pump for flue gas desulfurization according to claim 1, characterized in that: The heat dissipation tank (10) is equipped with a pressure relief component (22).

5. The lime slurry pump for flue gas desulfurization according to claim 4, characterized in that: The pressure relief assembly (22) includes a valve body (23), which is provided with an air inlet (24) and a pressure relief hole (25). Multiple guide bars (26) are provided inside the valve body (23). A pressure plate (27) is movably provided on the guide bars (26). A spring (28) is provided at the bottom of the pressure plate (27). A valve core (29) is provided at one end of the spring (28) and abuts against the air inlet (24). The valve core (29) is movably connected to the guide bars (26). An adjusting screw (30) is threadedly connected to the top of the valve body (23). One end of the adjusting screw (30) is rotatably connected to the pressure plate (27).

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