Improved desulfurization slurry pump inlet filtering device

Abstract

An improved desulfurization slurry pump inlet filtering device comprises a filtering device, a lime slurry pump and a slurry pipeline. The filtering device comprises a turbulent flow cover which is of a hollow flat-top cone structure, the top face of the turbulent flow cover is communicated with a discharge pipe, and a double-end flange pipe is arranged on the bottom face of the turbulent flow cover and composed of an inlet pipe, a second flange and a third flange, the end face, close to the turbulence cover, of the second flange extends to form a secondary turbulence structure in the axis direction of the inlet pipe. The turbulent flow cover of the flat-top cone structure is provided, two layers of turbulent flow are achieved, gathered calcium hydroxide can be evenly dispersed, the filter screen is arranged at the tail end of the turbulent flow cover to emphatically filter limestone raw material impurities, the limestone impurities can be filtered, and therefore the service life of the whole system is remarkably prolonged.

Description

Technical Field

[0001] This utility model relates to the field of chemistry, and more particularly to desulfurization equipment, especially to desulfurization slurry equipment in wet or semi-dry desulfurization systems, specifically an improved desulfurization slurry pump inlet filter device. Background Technology

[0002] With the rapid development of industrial production, such as in steel plants, coking plants, power plants, and sintering plants, large amounts of gases containing toxic and harmful substances are generated. These gases must be purified through desulfurization systems before being released into the atmosphere. Currently, most desulfurization processes employ wet or spray-rotary semi-dry methods, both of which require slurry pumps to supply the desulfurization slurry.

[0003] In existing technologies, the slurry used for desulfurization is supplied by a lime slurry pump and a circulating slurry pump. The slurry supply device includes a limestone slurry tank, a circulating slurry tank, valves, a complete set of pumps, a drive motor, a slurry density meter, a slurry flow meter, and a slurry control and regulating valve. The existing slurry pump supply device has the following problems:

[0004] 1. The limestone raw material used for pulping contains a small amount of insoluble granular impurities, which causes wear and tear on pipes and valves, resulting in slurry leakage.

[0005] 2. The presence of particulate impurities in the slurry causes wear on the slurry pump impeller, affecting the dynamic balance and resulting in higher vibration values ​​during operation.

[0006] 3. Because the slurry contains particulate impurities, the inner wall of the pump casing is easily worn and forms a honeycomb pattern. When the pump is running, the resistance of the slurry inside the pump is large, which increases the operating load of the motor.

[0007] 4. Due to the presence of particulate impurities in the slurry, the pump outlet and pipeline are severely worn. The excessive flow rate during pump operation causes the motor current to rise, which in turn raises the temperature of the motor bearings and windings, affecting the service life of the motor.

[0008] 5. Due to the presence of particulate impurities in the slurry, long-term operation can lead to wear and tear on pipelines and valves, resulting in slurry leakage. Once leakage occurs, pump shutdown and maintenance are required, affecting the system's environmental data control.

[0009] 6. The presence of particulate impurities in the slurry causes wear on the sensor probes of the slurry density meter and flow meter, affecting the accuracy of the detection data; long-term operation can damage the measuring equipment.

[0010] 7. Because the slurry contains particulate impurities, these impurities enter the atomizing wheel of the atomizer, causing abnormally high shaft vibration during operation and wear on the nozzle and the inner wall of the atomizing wheel, affecting the safe and stable operation and service life of the atomizer. Utility Model Content

[0011] The purpose of this invention is to provide an improved inlet filtration device for desulfurization slurry pumps. The accumulation of calcium hydroxide and a small amount of limestone raw material impurities is the main cause of failure. This invention can evenly disperse the accumulated calcium hydroxide and filter limestone impurities. By utilizing a flat-top conical turbulence hood, a two-layer turbulence effect can be achieved, which can evenly disperse the accumulated calcium hydroxide. A filter screen is set at the end of the turbulence hood to filter limestone raw material impurities, thereby significantly extending the service life of the overall system.

[0012] To achieve the above objectives, this utility model provides an improved desulfurization slurry pump inlet filtration device, which includes a filtration device, a lime slurry pump, and a slurry pipeline.

[0013] The filtration device includes a turbulence hood, which is a hollow flat-topped cone structure. The top surface of the turbulence hood is connected to a discharge pipe. A first flange is welded to the end of the discharge pipe. The bottom surface of the turbulence hood is provided with a double-ended flange pipe, which consists of an inlet pipe and a second flange and a third flange welded to both ends of the inlet pipe. The second flange is close to the end face of the turbulence hood and extends along the axial direction of the inlet pipe, with a secondary turbulence structure. The secondary turbulence structure includes several pairs of symmetrically arranged plates. The proximal end of the plates is welded to the end face of the second flange, and the distal end extends into the turbulence hood. Several rows of turbulence square tubes are welded to the distal end of the plates. The turbulence square tubes are spaced apart along the axial direction of the inlet pipe and are all perpendicular to the axial direction of the inlet pipe. The second flange is connected to the bottom surface of the turbulence hood, and the inlet pipe is connected to the inner cavity of the turbulence hood.

[0014] The inlet flange of the lime slurry pump is sealed to the first flange, and a filter screen is installed between the inlet flange and the first flange;

[0015] A fourth flange is welded to the end of the slurry pipe, and the fourth flange and the third flange are connected in a sealed manner.

[0016] The inner diameter of the inlet pipe is smaller than the inner cavity diameter of the turbulence hood near the bottom surface, and the inner diameter of the outlet pipe is equal to the inner cavity diameter of the turbulence hood near the top surface.

[0017] Furthermore, this utility model provides an improved desulfurization slurry pump inlet filtration device, wherein a flange groove is formed on the bottom surface of the turbulence shroud, and the second flange is fitted into the flange groove and fastened with bolts.

[0018] Furthermore, this utility model provides an improved desulfurization slurry pump inlet filtration device, wherein a sealing ring is installed between the second flange and the flange sink.

[0019] Furthermore, this utility model provides an improved desulfurization slurry pump inlet filtration device, wherein the turbulent square tubes are arranged in at least two columns along the axis of the inlet pipe, the first column has n tubes, the second column has n-1 tubes, and the second column of turbulent square tubes and the first column of turbulent square tubes are arranged alternately, where n is a positive integer.

[0020] Furthermore, this utility model provides an improved desulfurization slurry pump inlet filtration device, wherein the lowest part of the bottom surface of the turbulence shroud is provided with an exhaust pipe, and the exhaust pipe is equipped with an exhaust valve.

[0021] This invention has the following advantages over the prior art:

[0022] It enables the slurry pump to operate long-term, stably and safely, reduces wear on impellers, pump casing walls, pipes, valves, and regulating valve plates, and extends service life;

[0023] To prevent impurities and particles in the slurry from entering the atomizing wheel of the atomizer, reduce vibration of the atomizer's running shaft, and reduce wear on the nozzle and atomizing wheel body;

[0024] Reduce wear on the sensor probes of slurry density meters and flow meters, and extend their service life;

[0025] To avoid overcurrent operation of the drive motor, which can cause the temperature of the motor windings and the motor body to rise, affecting the insulation performance of the motor windings and shortening its service life;

[0026] Reduce the maintenance and equipment replacement costs of the entire system. Attached Figure Description

[0027] Figure 1 This is a schematic diagram of the overall structure of an improved desulfurization slurry pump inlet filter device according to the present invention.

[0028] Figure 2 Exploded view of the structure of an improved desulfurization slurry pump inlet filter device according to this utility model;

[0029] Figure 3 for Figure 2 Diagram showing the changing angle;

[0030] Figure 4 This diagram illustrates the turbulence effect of lime slurry entering the turbulence hood through the inlet pipe.

[0031] Figure 5 This is a diagram illustrating the effect of lime slurry undergoing a secondary turbulent flow structure.

[0032] The components include: 1. lime slurry pump; 2. slurry pipeline; 3. turbulence hood; 4. discharge pipe; 5. first flange; 6. inlet pipe; 7. second flange; 8. third flange; 9. plate; 10. turbulence square tube; 11. flange countersink; 12. sealing ring; 13. filter screen; 14. fourth flange; and 15. drain pipe. Detailed Implementation

[0033] The technical solution of this utility model will be clearly and completely described below with reference to the embodiments and accompanying drawings. 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.

[0034] In the description of this utility model, it should be noted that the terms "upper," "lower," "inner," "outer," "front end," "rear end," "both ends," "one end," and "the other end," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or component referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0035] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installed," "equipped with," and "connected," etc., should be interpreted broadly. For example, "connected" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium; it can be a connection within two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0036] like Figures 1-3 As shown, this embodiment provides an improved desulfurization slurry pump inlet filtration device, characterized in that it includes a filtration device, a lime slurry pump 1, and a slurry pipeline 2;

[0037] The filtration device includes a turbulence hood 3, which is a hollow flat-topped cone structure. The top surface of the turbulence hood 3 is connected to a discharge pipe 4. A first flange 5 is welded to the end of the discharge pipe 4. The bottom surface of the turbulence hood 3 is provided with a double-ended flange pipe, which consists of an inlet pipe 6 and a second flange 7 and a third flange 8 welded to both ends of the inlet pipe 6. A secondary turbulence structure extends from the end face of the second flange 7 near the turbulence hood 3 and along the axial direction of the inlet pipe 6. The secondary turbulence structure includes several pairs of symmetrically arranged plates 9. The proximal end of each plate 9 is welded to the end face of the second flange 7, and the distal end extends into the turbulence hood 3. A plurality of turbulent square tubes 10 are welded together. The plurality of turbulent square tubes 10 are distributed at intervals along the axial direction of the inlet pipe 6 and are all perpendicular to the axial direction of the inlet pipe 6. In this embodiment, at least two rows of turbulent square tubes 10 are arranged along the axial direction of the inlet pipe 6, with three tubes in the first row and two tubes in the second row. The second row of turbulent square tubes 10 and the first row of turbulent square tubes 10 are arranged alternately along the axial direction of the inlet pipe 6. A flange groove 11 is opened on the bottom surface of the turbulence hood 3. The second flange 7 is fitted into the flange groove 11 and fastened with bolts. A sealing ring 12 is installed between the second flange 7 and the flange groove 11. The inlet pipe 6 is connected to the inner cavity of the turbulence hood 3.

[0038] The inlet flange of the lime slurry pump 1 is sealed to the first flange 5, and a filter screen 13 is installed between the inlet flange and the first flange 5.

[0039] A fourth flange 14 is welded to the end of the slurry pipe 2, and the fourth flange 14 and the third flange 8 are sealed together.

[0040] Wherein, the inner diameter of the inlet pipe 6 is smaller than the inner cavity diameter of the turbulence hood 3 near the bottom surface, and the inner diameter of the outlet pipe 4 is equal to the inner cavity diameter of the turbulence hood 3 near the top surface;

[0041] To facilitate the cleaning of sediment inside the turbulence hood 3, the lowest part of the bottom surface of the turbulence hood 3 in this embodiment is provided with a drain pipe 15, and the drain pipe 15 is equipped with a drain valve.

[0042] The usage process and principle of this embodiment are as follows: The main component of lime slurry is slaked lime, i.e., calcium hydroxide. Slaked lime is the product of the reaction between quicklime and water. This reaction is exothermic. The calcium hydroxide produced has low solubility in water and usually forms a suspension, commonly known as lime milk. Secondly, the lime slurry may also contain some calcium carbonate impurities. Calcium carbonate impurities and the deposited calcium hydroxide layer are the main reasons for the accelerated wear of the entire system. In this invention, the lime slurry enters the inlet pipe 6 through the slurry pipe 2. When it enters the turbulence hood 3 along the inlet pipe 6, it diffuses rapidly. The first turbulence homogenization treatment is as follows: Figure 4 As shown, it then flows through a secondary turbulent structure, such as Figure 5 As shown, this effectively prevents calcium hydroxide from entering the lime slurry pump 1 and subsequent equipment in a laminar flow form, thus aggravating equipment aging and damage. The fully mixed lime slurry flows through the filter screen 13, where large particles of calcium carbonate are intercepted. These three lines of defense can significantly extend the service life of the entire machine.

[0043] Any aspects of this utility model not described in detail are well-known technologies to those skilled in the art.

[0044] The preferred embodiments of this utility model have been described in detail above. It should be understood that those skilled in the art can make numerous modifications and variations based on the concept of this utility model without creative effort. Therefore, all technical solutions that can be obtained by those skilled in the art based on the concept of this utility model through logical analysis, reasoning, or limited experimentation on the basis of existing technology should be within the scope of protection defined by the claims.

Claims

1. An improved desulfurization slurry pump inlet filtration device, characterized in that, Includes filtration equipment, lime slurry pumps, and slurry pipelines; The filtration device includes a turbulence hood, which is a hollow flat-topped cone structure. The top surface of the turbulence hood is connected to a discharge pipe. A first flange is welded to the end of the discharge pipe. The bottom surface of the turbulence hood is provided with a double-ended flange pipe, which consists of an inlet pipe and a second flange and a third flange welded to both ends of the inlet pipe. A secondary turbulence structure extends from the end face of the second flange near the turbulence hood and along the axial direction of the inlet pipe. The secondary turbulence structure includes several pairs of symmetrically arranged plates. The proximal end of the plates is welded to the end face of the second flange, and the distal end extends into the turbulence hood. Several rows of turbulence square tubes are welded to the distal end of the plates. The turbulence square tubes are spaced apart along the axial direction of the inlet pipe and are all perpendicular to the axial direction of the inlet pipe. The second flange is connected to the bottom surface of the turbulence hood, and the inlet pipe is connected to the inner cavity of the turbulence hood. The inlet flange of the lime slurry pump is sealed to the first flange, and a filter screen is installed between the inlet flange and the first flange; A fourth flange is welded to the end of the slurry pipe, and the fourth flange and the third flange are connected in a sealed manner. The inner diameter of the inlet pipe is smaller than the inner cavity diameter of the turbulence hood near the bottom surface, and the inner diameter of the outlet pipe is equal to the inner cavity diameter of the turbulence hood near the top surface.

2. The improved desulfurization slurry pump inlet filter device according to claim 1, characterized in that, The bottom surface of the turbulence shield has a flange groove, and the second flange is fitted into the flange groove and fastened with bolts.

3. The improved desulfurization slurry pump inlet filtration device according to claim 2, characterized in that, A sealing ring is installed between the second flange and the flange countersink.

4. The improved desulfurization slurry pump inlet filter device according to claim 1, characterized in that, The turbulent square tubes are arranged in at least two columns along the axis of the inlet pipe. The first column has n tubes and the second column has n-1 tubes. The second column of turbulent square tubes and the first column of turbulent square tubes are arranged alternately, and n is a positive integer.

5. The improved desulfurization slurry pump inlet filter device according to claim 1, characterized in that, The lowest part of the bottom surface of the turbulence shield is provided with an exhaust pipe, and the exhaust pipe is equipped with an exhaust valve.

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