A desulfurization slurry circulating pump structure

Abstract

The utility model relates to a kind of desulfurization slurry circulating pump structures, including absorption tower, further including total seat frame and at least two groups of circulating pump groups connected on total seat frame being located in absorption tower side, each group of circulating pump group includes at least one pump shell frame connected on total seat frame and rotatingly connected in pump shell frame press swivel, press swivel is rotatably connected with press roller on it, pump pipe is equipped between press roller and pump shell frame, pump pipe import end is connected with absorption tower, pump pipe export end is connected with adapter, adapter is connected with absorption tower.The beneficial effects of the present application are: using the conveying mode of press roller extruding pump pipe, slurry only contacts with pump pipe inner wall, without the direct contact of metal overcurrent component such as impeller, pump shell of traditional centrifugal pump and slurry, which avoids the wear and tear, perforation problem caused by slurry corrosion and particle scouring of metal components from the root;Multiple circulating pump groups are set, which can be independently started, stopped or speed-regulated, to realize the step adjustment of flow.

Description

Technical Field

[0001] This utility model belongs to the field of wastewater treatment technology in thermal power plants, and specifically relates to a desulfurization slurry circulation pump structure. Background Technology

[0002] The production processes in industries such as thermal power, steel, and chemicals generate large amounts of sulfur-containing flue gas, which, if directly emitted, will cause serious air pollution. In wet desulfurization systems, the generation and treatment of desulfurization wastewater are crucial for ensuring the stable operation of the system. Desulfurization wastewater originates from the slurry circulation process within the absorption tower and contains a large amount of suspended solids, heavy metal ions, and acidic substances. If not effectively treated, it will cause corrosion and blockage of downstream equipment, while also posing environmental compliance risks.

[0003] Traditionally, centrifugal pumps are used to transport liquids. However, desulfurization wastewater is highly acidic and has a high solids content. Conventional centrifugal pumps often use cast iron or ordinary stainless steel for their flow parts. Over long-term operation, the impeller is prone to corrosion and wear, requiring frequent shutdowns to replace the impeller, which increases maintenance costs. Utility Model Content

[0004] This utility model provides a desulfurization slurry circulation pump structure, which aims to solve the problem that the impeller components of existing conventional centrifugal pumps are easily corroded and worn, requiring frequent shutdowns to replace the impellers, thus increasing operation and maintenance costs.

[0005] To achieve the above objectives, the technical solution adopted by this utility model is as follows: a desulfurization slurry circulation pump structure is provided, including an absorption tower, a main support frame disposed on one side of the absorption tower, and at least two sets of circulation pump sets connected to the main support frame. Each set of circulation pump sets includes at least one pump casing frame connected to the main support frame and a pressing frame rotatably connected inside the pump casing frame. A pressing roller is rotatably connected to the pressing frame. A pump pipe is provided between the pressing roller and the pump casing frame. The inlet end of the pump pipe is connected to the absorption tower, and an adapter is connected to the outlet end of the pump pipe. The adapter is connected to the absorption tower.

[0006] Furthermore, each of the circulating pump sets includes a pump body motor connected to the main frame, and the drive end of the pump body motor is connected to the pressing rotating frame.

[0007] Furthermore, the pump housing frame is provided with a tube groove, and the pump tube is snapped into the tube groove; the bottom of the pump housing frame is provided with a housing inlet hole and a housing outlet hole, one end of the pump tube passes through the housing inlet hole, and the other end of the pump tube passes through the housing outlet hole.

[0008] Furthermore, an inlet adapter box is connected to the main support frame, and a first connection end is connected to the inlet adapter box. The pump pipe is connected to the inlet adapter box through the first connection end. A second connection end is connected to the inlet adapter box, and an inlet pipe is connected to the second connection end. The inlet pipe is connected to the absorption tower.

[0009] Furthermore, the adapter includes an auxiliary tower located on one side of the absorption tower, and an auxiliary liquid outlet conduit is connected to the auxiliary tower and connected to the upper end of the absorption tower.

[0010] Furthermore, the adapter includes a pressurizing cylinder connected to the main support frame, a cylinder adapter box connected to the upper end of the pressurizing cylinder, a pump pipe connected to the cylinder adapter box, a cylinder outlet pipe connected to the outlet end of the pressurizing cylinder, and the cylinder outlet pipe connected to the auxiliary tower.

[0011] Furthermore, an auxiliary adapter box is connected to the auxiliary tower, and the liquid outlet pipe of the cylinder is connected to the auxiliary tower through the auxiliary adapter box.

[0012] Furthermore, the cylinder adapter box is provided with a liquid outlet at one end inside the pressure cylinder, and a push block is slidably connected inside the pressure cylinder. When the push block is in the initial position, the liquid outlet is connected to the pressure cylinder; when the push block moves out of the initial position, the push block abuts against the liquid outlet.

[0013] Furthermore, the main frame is connected to a telescopic support and a telescopic cylinder connected to the telescopic support, and the telescopic end of the telescopic cylinder is connected to the push block.

[0014] Furthermore, the pump tube is made of polytetrafluoroethylene propylene.

[0015] The advantages of this utility model compared with the prior art are as follows:

[0016] 1. In each group of circulating pumps, the pressing frame drives the pressing roller to press the pump pipe, which can generate a stable conveying force, ensure that the desulfurization slurry flows smoothly in the pump pipe, and effectively improve the conveying efficiency of the slurry.

[0017] 2. The pump tube is conveyed by pressing rollers, ensuring that the slurry only contacts the inner wall of the pump tube. Unlike traditional centrifugal pumps, there is no direct contact between the slurry and metal flow parts such as the impeller and pump casing. This fundamentally avoids wear and perforation problems caused by slurry corrosion and particle erosion of metal parts. In particular, the pump tube can be made of corrosion-resistant and flexible material, capable of withstanding the strong acidity and high solids content of the desulfurization slurry. Compared to the metal flow parts of traditional centrifugal pumps, this significantly reduces the frequency of equipment replacement.

[0018] 3. Multiple sets of circulating pumps are set up, which can be started, stopped or speed adjusted independently to achieve graded flow regulation, adapt to the slurry circulation requirements of the desulfurization system under different load conditions, and avoid the problem of needing to shut down the whole machine for maintenance during maintenance, which reduces efficiency.

[0019] 4. The pressing roller is made of rubber. By pressing the pump tube flexibly, it reduces the degree of damage to the pump tube and can reduce the frequency of pump tube replacement to a certain extent. Attached Figure Description

[0020] Figure 1 A partial structural diagram of a desulfurization slurry circulation pump structure provided for an embodiment of this utility model;

[0021] Figure 2 for Figure 1 Enlarged structural diagram at point Q;

[0022] Figure 3 for Figure 1 Enlarged structural diagram at point W;

[0023] Figure 4 A schematic diagram of the overall structure of a desulfurization slurry circulation pump provided in this embodiment of the utility model. Figure 1 ;

[0024] Figure 5 A schematic diagram of the overall structure of a desulfurization slurry circulation pump provided in this embodiment of the utility model. Figure 2 ;

[0025] Figure 6 A schematic diagram of the overall structure of a desulfurization slurry circulation pump provided in this embodiment of the utility model. Figure 3 ;

[0026] Figure 7 A partial top view of a desulfurization slurry circulation pump structure provided for an embodiment of this utility model;

[0027] Figure 8 for Figure 7 Schematic diagram of the cross-sectional structure at point AA;

[0028] Figure 9 for Figure 8 Enlarged structural diagram at point E;

[0029] Figure 10 for Figure 7 Schematic diagram of the cross-sectional structure at point BB;

[0030] Figure 11 for Figure 10 A magnified structural diagram at point R in the middle.

[0031] Explanation of reference numerals in the attached figures:

[0032] 1. Absorption tower; 2. Main support frame; 3. Circulating pump set;

[0033] 31. Pump casing bracket; 311. Pipe body groove; 312. Casing inlet; 313. Casing outlet;

[0034] 32. Pressing frame; 33. Pressing roller; 34. Pump pipe; 35. Pump body motor;

[0035] 4. Adapter components;

[0036] 41. Auxiliary tower; 411. Auxiliary adapter box;

[0037] 42. Auxiliary discharge conduit;

[0038] 43. Pressurizing cylinder; 431. Cylinder body adapter box; 4311. Liquid outlet hole; 432. Cylinder body liquid outlet pipe;

[0039] 44. Push block; 45. Telescopic support; 46. Telescopic cylinder;

[0040] 5. Liquid inlet adapter box; 51. First connection end; 52. Second connection end; 53. Liquid inlet pipe. Detailed Implementation

[0041] To make the technical problem to be solved, the technical solution, and the beneficial effects of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present utility model and are not intended to limit the present utility model.

[0042] See Figure 1 , Figure 2 , Figure 4 , Figure 5 , Figure 6 , Figure 7 , Figure 8 , Figure 9 , Figure 10 and Figure 11 As shown, this utility model discloses a desulfurization slurry circulation pump structure, including an absorption tower 1, a main support frame 2 disposed on one side of the absorption tower 1, and at least two sets of circulation pump sets 3 connected to the main support frame 2. Each set of circulation pump sets 3 includes at least one pump casing frame 31 connected to the main support frame 2 and a pressing frame 32 rotatably connected to the pump casing frame 31. A pressing roller 33 is rotatably connected to the pressing frame 32. A pump pipe 34 is provided between the pressing roller 33 and the pump casing frame 31. The inlet end of the pump pipe 34 is connected to the absorption tower 1, and the outlet end of the pump pipe 34 is connected to an adapter 4. The adapter 4 is connected to the absorption tower 1.

[0043] In this embodiment, the pump tube 34 is conveyed by pressing the roller 33, so the slurry only contacts the inner wall of the pump tube 34. There is no direct contact between the slurry and metal flow parts such as the impeller and pump casing of a traditional centrifugal pump. This fundamentally avoids the wear and perforation problems caused by slurry corrosion and particle erosion of metal parts. In particular, the pump tube 34 can be made of a corrosion-resistant and flexible material, which can withstand the strong acidity and high solids content of the desulfurization slurry, significantly reducing the equipment replacement frequency compared to the metal flow parts of a traditional centrifugal pump.

[0044] In addition, multiple sets of circulating pumps are set up, which can be started, stopped or speed adjusted independently to achieve graded flow regulation, adapt to the slurry circulation requirements under different load conditions of the desulfurization system, and avoid the problem of needing to shut down the whole machine for maintenance during the inspection, which reduces efficiency.

[0045] Meanwhile, the pressing roller 33 is made of rubber, which reduces the damage to the pump tube 34 by gently pressing it, thus reducing the frequency of pump tube 34 replacement to a certain extent.

[0046] See Figure 4 , Figure 5 , Figure 6 , Figure 7 and Figure 10 As shown, in some embodiments, each of the circulating pump groups 3 includes a pump body motor 35 connected to the main frame 2, and the drive end of the pump body motor 35 is connected to the pressing rotating frame 32.

[0047] In this embodiment, the pump motor 35 is equipped with a frequency converter control module. By adjusting the motor speed, the rotation speed of the pressing frame 32 is controlled, thereby quickly adjusting the squeezing frequency of the pressing roller 33 on the pump pipe 34, achieving stepless adjustment of the slurry delivery flow rate. When the flue gas volume fluctuates due to changes in boiler load, the motor speed can be adjusted by frequency converter to quickly respond to the flow demand within the range of 10-60 r / min, ensuring stable contact reaction efficiency between the desulfurization slurry and the flue gas.

[0048] Secondly, see Figure 5 As shown, to ensure the stability of the rotation of the output end of the pump body motor 35, a bearing is connected to the main frame 2, and the output end of the pump body motor 35 is rotatably connected to the main frame 2 through the bearing.

[0049] In addition, the pump body motor 35 adopts the YBX3 explosion-proof motor.

[0050] See Figure 4 , Figure 5 , Figure 6 , Figure 7 and Figure 10As shown, in some embodiments, the pump housing frame 31 is provided with a tube groove 311, and the pump tube 34 is snapped into the tube groove 311; the bottom of the pump housing frame 31 is provided with a housing inlet hole 312 and a housing outlet hole 313, one end of the pump tube 34 passes through the housing inlet hole 312, and the other end of the pump tube 34 passes through the housing outlet hole 313.

[0051] In this embodiment, the tube groove 311 on the pump housing frame 31 is adapted to the shape of the pump tube 34, which can lock and limit the pump tube 34 to prevent axial movement or radial displacement of the pump tube 34 during the extrusion of the pressing roller 33; the arc design of the tube groove 311 fits the outer wall of the pump tube 34, which can disperse the extrusion force applied by the pressing roller 33 and prevent the tube wall from being damaged due to local stress concentration; at the same time, the housing inlet hole 312 and the housing outlet hole 313 are both provided with rounded corner treatment to reduce fatigue damage caused by repeated extrusion.

[0052] See Figure 1 , Figure 2 and Figure 3 As shown, in some embodiments, the main support frame 2 is connected to a liquid inlet adapter box 5, the liquid inlet adapter box 5 is connected to a first connection end 51, the pump pipe 34 is connected to the liquid inlet adapter box 5 through the first connection end 51, the liquid inlet adapter box 5 is connected to a second connection end 52, the second connection end 52 is connected to a liquid inlet pipe 53, and the liquid inlet pipe 53 is connected to the absorption tower 1.

[0053] In this embodiment, the liquid inlet adapter box 5 is connected to the pump pipe 34 through the first connection end 51 and is uniformly connected to the liquid inlet pipe 53 through the second connection end 52, which reduces the number of pipe joints. The reduction in the number of joints directly reduces the risk of leakage of desulfurization slurry. At the same time, the standardized connection structure facilitates the installation of seals and further improves the corrosion resistance and sealing performance of the system.

[0054] In addition, by setting up the liquid inlet adapter box 5, a switch valve is installed on the liquid inlet adapter box 5, which makes it convenient to close the liquid inlet adapter box 5 during maintenance and avoid the problem of excessive leakage of corrosive liquid.

[0055] See Figure 4 , Figure 5 and Figure 6 As shown, in some embodiments, the adapter 4 includes an auxiliary tower 41 disposed on one side of the absorption tower 1, and an auxiliary liquid outlet conduit 42 is connected to the auxiliary tower 41 and connected to the upper end of the absorption tower 1.

[0056] In this embodiment, the auxiliary tower 41 can serve as a buffer unit to adjust the slurry circulation volume and reaction rhythm, thereby avoiding significant fluctuations in desulfurization efficiency.

[0057] See Figure 4 , Figure 5 , Figure 6 , Figure 7 and Figure 8 As shown, in some embodiments, the adapter 4 includes a pressure cylinder 43 connected to the main support frame 2, a cylinder adapter box 431 connected to the upper end of the pressure cylinder 43, a pump pipe 34 connected to the cylinder adapter box 431, a cylinder outlet pipe 432 connected to the outlet end of the pressure cylinder 43, and the cylinder outlet pipe 432 connected to the auxiliary tower 41.

[0058] In this embodiment, the pressurizing cylinder 43 collects the slurry transported by the pump pipes 34 of multiple sets of circulating pump sets 3 through the cylinder adapter box 431, and performs secondary pressurization on the slurry, thus solving the problem of insufficient pressure of the circulating pump set 3.

[0059] In addition, to achieve coordinated control between the pressurizing cylinder 43 and the circulating pump group 3, a pressure sensor is installed inside the cylinder adapter box 431 or the pressurizing cylinder 43 to monitor the slurry pressure inside the pressurizing cylinder 43 in real time and convert the pressure signal into an electrical signal for transmission to the frequency converter control cabinet. A pressure threshold is set, such as a working pressure of 2-5 MPa. When the pressure is lower than the lower limit, the control cabinet automatically instructs the pump motor 35 to increase its speed, thereby increasing the slurry delivery volume of the circulating pump group 3. When the pressure is higher than the upper limit, the motor speed is reduced or some pump groups are shut down to prevent the pressurizing cylinder 43 from operating under overpressure. This ensures that the pressure inside the pressurizing cylinder 43 remains stable within the set range, preventing slurry delivery interruptions or pipeline impacts caused by pressure fluctuations.

[0060] See Figure 4 , Figure 5 and Figure 6 As shown, in some embodiments, an auxiliary adapter box 411 is connected to the auxiliary tower 41, and the liquid outlet pipe 432 of the cylinder is connected to the auxiliary tower 41 through the auxiliary adapter box 411.

[0061] In this embodiment, the slurry output from the pressurizing cylinder 43 has a high pressure, and direct connection to the auxiliary tower 41 can easily cause impact wear to the internal structure of the tower. The cavity structure of the auxiliary transfer box 411 can reduce the pressure of the high-pressure slurry, weaken the impact kinetic energy of the slurry, and prevent the inner wall and internal components of the tower from being damaged or falling off due to long-term high-pressure impact. At the same time, the buffered slurry flow rate is more stable, reducing turbulence in the auxiliary tower and making the desulfurization reaction more complete and stable.

[0062] In addition, the auxiliary adapter box 411 can centrally connect to multiple cylinder outlet pipes 432. Furthermore, when a certain cylinder outlet pipe 432 needs maintenance, the corresponding valve on the auxiliary adapter box 411 can be closed separately without shutting down the slurry supply of the entire auxiliary tower, thus improving maintenance efficiency.

[0063] See Figure 8 and Figure 9 As shown, in some embodiments, the cylinder adapter box 431 is provided with a liquid outlet hole 4311 at one end inside the pressure cylinder 43, and a push block 44 is slidably connected inside the pressure cylinder 43. When the push block 44 is in the initial position, the liquid outlet hole 4311 is connected to the pressure cylinder 43; when the push block 44 moves out of the initial position, the push block 44 abuts against the liquid outlet hole 4311.

[0064] In this embodiment, when the push block 44 is in the starting position, the liquid enters the pressurizing cylinder 43. Then, the push block 44 starts to move and blocks the liquid outlet 4311 to prevent liquid backflow.

[0065] In addition, the push block 44 can be made of wear-resistant and corrosion-resistant polytetrafluoroethylene or high-chromium alloy, which can adapt to the harsh working conditions of desulfurization slurry. When maintenance is required, the push block 44 can be taken out for cleaning or replacement simply by removing the end cover of the pressure cylinder 43. Compared with maintaining components such as coils and valve cores of electric valves, this reduces maintenance procedures and further reduces operation and maintenance costs.

[0066] See Figure 4 , Figure 5 , Figure 6 , Figure 7 and Figure 8 As shown, in some embodiments, the main frame 2 is connected to a telescopic support 45 and a telescopic cylinder 46 connected to the telescopic support 45, and the telescopic end of the telescopic cylinder 46 is connected to the push block 44.

[0067] In this embodiment, the telescopic cylinder 46 used in this application is a Festo standard pneumatic telescopic cylinder, such as DSBA-F-80-320-CA. In addition, the model of the telescopic cylinder 46 can be selected according to actual needs.

[0068] In some embodiments, the pump tube 34 is made of polytetrafluoroethylene propylene.

[0069] In this embodiment, it can withstand the corrosion of strong acids, strong alkalis and heavy metal ions in desulfurization slurry, and does not swell or age after long-term immersion; at the same time, the temperature resistance range of FEP can reach -20℃~200℃, which can adapt to the temperature fluctuation of slurry during the operation of desulfurization system. Compared with traditional rubber hoses or polyethylene hoses, its service life is increased by 2-3 times, and the problem of pipeline corrosion and leakage is completely solved.

[0070] In addition, it has excellent flexibility and fatigue resistance. The FEP material is more flexible than PTFE and can be adapted to the press drive mode. The minimum bending radius can be as low as 3-5 times the pipe diameter. It can fit perfectly with the tube groove 311 of the pump housing frame 31. Under the high-frequency extrusion of the press roller 33, it has outstanding fatigue resistance and is not easy to crack or break after repeated deformation.

[0071] Meanwhile, the pump pipe 34 is made of recyclable material, and the scrapped pump pipe can be recycled and reprocessed, reducing environmental pollution.

[0072] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A desulfurization slurry circulation pump structure, comprising an absorption tower (1), characterized in that, It also includes a main frame (2) located on one side of the absorption tower (1) and at least two sets of circulating pump sets (3) connected to the main frame (2). Each set of circulating pump sets (3) includes at least one pump housing frame (31) connected to the main frame (2) and a pressing frame (32) rotatably connected to the pump housing frame (31). A pressing roller (33) is rotatably connected to the pressing frame (32). A pump pipe (34) is provided between the pressing roller (33) and the pump housing frame (31). The inlet end of the pump pipe (34) is connected to the absorption tower (1), and the outlet end of the pump pipe (34) is connected to an adapter (4). The adapter (4) is connected to the absorption tower (1).

2. The desulfurization slurry circulation pump structure as described in claim 1, characterized in that, Each of the circulating pump sets (3) includes a pump body motor (35) connected to the main frame (2), and the drive end of the pump body motor (35) is connected to the pressing frame (32).

3. The desulfurization slurry circulation pump structure as described in claim 1, characterized in that, The pump housing frame (31) is provided with a tube groove (311), and the pump tube (34) is snapped into the tube groove (311); the bottom of the pump housing frame (31) is provided with a housing inlet hole (312) and a housing outlet hole (313), one end of the pump tube (34) passes through the housing inlet hole (312), and the other end of the pump tube (34) passes through the housing outlet hole (313).

4. The desulfurization slurry circulation pump structure as described in claim 1, characterized in that, The main frame (2) is connected to a liquid inlet adapter box (5), and the liquid inlet adapter box (5) is connected to a first connection end (51). The pump pipe (34) is connected to the liquid inlet adapter box (5) through the first connection end (51). The liquid inlet adapter box (5) is connected to a second connection end (52), and the second connection end (52) is connected to a liquid inlet pipe (53). The liquid inlet pipe (53) is connected to the absorption tower (1).

5. The desulfurization slurry circulation pump structure as described in claim 1, characterized in that, The adapter (4) includes an auxiliary tower (41) located on one side of the absorption tower (1), and an auxiliary liquid outlet conduit (42) is connected to the auxiliary tower (41). The auxiliary liquid outlet conduit (42) is connected to the upper end of the absorption tower (1).

6. The desulfurization slurry circulation pump structure as described in claim 5, characterized in that, The adapter (4) includes a pressure cylinder (43) connected to the main frame (2), a cylinder adapter box (431) connected to the upper end of the pressure cylinder (43), a pump pipe (34) connected to the cylinder adapter box (431), a cylinder outlet pipe (432) connected to the outlet end of the pressure cylinder (43), and the cylinder outlet pipe (432) connected to the auxiliary tower (41).

7. The desulfurization slurry circulation pump structure as described in claim 6, characterized in that, An auxiliary adapter box (411) is connected to the auxiliary tower (41), and the liquid outlet pipe (432) of the cylinder is connected to the auxiliary tower (41) through the auxiliary adapter box (411).

8. The desulfurization slurry circulation pump structure as described in claim 6, characterized in that, The cylinder adapter box (431) is located inside the pressure cylinder (43) and has a liquid outlet hole (4311) at one end. A push block (44) is slidably connected inside the pressure cylinder (43). When the push block (44) is in the starting position, the liquid outlet hole (4311) is connected to the pressure cylinder (43). When the push block (44) moves out of the starting position, the push block (44) abuts against the liquid outlet hole (4311).

9. The desulfurization slurry circulation pump structure as described in claim 8, characterized in that, The main frame (2) is connected to a telescopic support (45) and a telescopic cylinder (46) connected to the telescopic support (45). The telescopic end of the telescopic cylinder (46) is connected to the push block (44).

10. The desulfurization slurry circulation pump structure as described in claim 1, characterized in that, The pump tube (34) is made of polytetrafluoroethylene propylene.

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