Lime slurry suction device

Abstract

According to the lime slurry suction device provided by the utility model, the siphon pump is adopted to replace a submerged pump and is matched with the siphon container to realize siphonage so as to suck lime slurry in the slurry making tank, and the siphon pump does not need an impeller, so that the siphon pump is not easy to block like the submerged pump, and the blocking problem is effectively solved; and the maintenance cost and the operation difficulty are reduced.

Description

TECHNICAL FIELD

[0001] The utility model relates to the field of lime slurry sucking device. BACKGROUND

[0002] In the production process of anhydrous hydrogen fluoride, tail gas and slag gas are generated, which need to be sprayed and absorbed. The conventional spraying liquid is lime slurry. In order to ensure the stable supply of lime slurry, a slurry preparation system is used. The existing lime slurry preparation system is configured with a lime powder bin and an underground slurry preparation tank, and a stirring device is arranged in the slurry preparation tank. The slurry preparation process is as follows: first, a certain amount of water is added to the slurry preparation tank by opening the regulating valve, then a certain mass of lime is transported to the slurry preparation tank by the metering auger, and the stirring device is stirred during the process to mix uniformly, finally lime slurry with a solid content of 15% is produced, and is transported to the desulfurization and defluorination system circulating tank. The conveying equipment usually uses a submerged pump. Since the impurities of lime are deposited at the pump impeller, it is easy to cause blockage, so the failure rate of the submerged pump is high. Therefore, in order to solve the problem, the technical personnel can only keep the slurry level below the pump impeller, and frequent flushing and jacking are required. This method greatly increases the operation difficulty, cannot fully utilize the slurry storage space of the slurry preparation tank, and under the driving of the stirring device, slurry will still be deposited at the pump impeller, causing the submerged pump to be blocked and unable to work. There is another solution method, which changes the lime slurry to liquid caustic soda. Although this method can effectively solve the problem of submerged pump blockage, it greatly increases the operation cost. CONTENT OF THE UTILITY MODEL

[0003] Therefore, it is necessary to provide a lime slurry sucking device to solve the problem that the submerged pump is easy to block and cause production to stop.

[0004] To achieve the above-mentioned purpose, the utility model provides a lime slurry sucking device, which comprises a siphon pump and a siphon container. The siphon container is provided with a container air release port, a container water inlet, a container liquid outlet and a container liquid inlet. The container liquid inlet is connected to the inside of the slurry preparation tank through a container liquid inlet pipeline. A container liquid inlet valve is arranged at the container liquid inlet. A container liquid outlet valve is arranged at the container liquid outlet. The container air release port is connected to the outside through a container air release pipeline. A container air release valve is arranged on the container air release pipeline. The siphon pump is provided with a pump liquid inlet and a pump liquid outlet. The container liquid outlet is connected to the pump liquid inlet through a container liquid outlet pipeline. A pump liquid outlet valve is arranged at the pump liquid outlet. The pump liquid outlet is connected to the liquid using equipment at the rear end through a pump liquid outlet pipeline. A container water inlet valve is arranged at the container water inlet. The container water inlet is connected to the process water source.

[0005] Further, one siphon pump and one siphon container are matched as a sucking group, and the sucking group is provided with a plurality of.

[0006] Further, the container liquid inlet valve, the container liquid outlet valve, the container gas release valve, the container water inlet valve, the pump liquid inlet valve and the pump liquid outlet valve can be solenoid valves.

[0007] Further, a controller is further included, which is electrically connected with the container liquid inlet valve, the container liquid outlet valve, the container gas release valve, the container water inlet valve, the pump liquid inlet valve and the pump liquid outlet valve.

[0008] Further, a pressure detector is further arranged at the pump liquid outlet.

[0009] Further, a slurry flow meter is further included, which is arranged at the pump liquid outlet of the siphon pump and / or the container liquid inlet of the siphon container.

[0010] Further, the siphon pump and the siphon container are arranged outside the pulp tank.

[0011] Further, the siphon pump and the siphon container are arranged at a height lower than the liquid level of the lime slurry in the pulp tank.

[0012] Different from the prior art, the above technical solution uses a siphon pump instead of a submerged pump, and cooperates with a siphon container to realize siphon phenomenon to extract lime slurry in the pulp tank. Since the siphon pump does not need an impeller, it will not be easily blocked like the submerged pump, effectively solving the blocking problem and reducing maintenance cost and operation difficulty.

[0013] After the submerged pump is replaced by the siphon pump, no blocking occurs during operation, completely eliminating the blocking phenomenon, not only ensuring that the tail gas meets the emission standard, but also not needing alkali solution, reducing operation cost, having good economic and environmental benefits. At the same time, the siphon process and its equipment are simple and easy to operate, reducing the working intensity of operators and maintenance personnel, and the device is stable and reliable in operation. BRIEF DESCRIPTION OF DRAWINGS

[0014] Figure 1 A structure schematic view of the suction device according to the embodiment is shown in the figure;

[0015] Figure 2 A structure schematic view of the suction device according to another embodiment is shown in the figure;

[0016] Figure 3 A structure schematic view of the suction device according to another embodiment is shown in the figure;

[0017] Figure 4 A structure schematic view of the suction device according to another embodiment is shown in the figure;

[0018] Figure 5A schematic structural view of the suction device provided with a slurry flow meter for another specific embodiment.

[0019] Explanation of reference numerals:

[0020] 10. Siphon pump

[0021] 101. Pump-out valve

[0022] 20. Siphon container

[0023] 201. Container-in valve

[0024] 202. Container-out valve

[0025] 203. Container-bleed valve

[0026] 204. Container-in water valve

[0027] 30. Pulp tank

[0028] 40. Controller

[0029] 50. Pressure detector

[0030] 60. Slurry flow meter DETAILED DESCRIPTION

[0031] In order to describe the technical content, structural features, purposes and effects of the technical solutions in detail, the following will be described in combination with specific embodiments and the accompanying drawings.

[0032] In this document, the term “embodiment” means that the specific features, structures or characteristics described in combination with the embodiment can be included in at least one embodiment of the present application. The term “embodiment” appearing at various positions in the specification does not necessarily refer to the same embodiment, and does not particularly limit the independence or association between other embodiments. In principle, in this application, as long as there is no technical contradiction or conflict, each technical feature mentioned in each embodiment can be combined in any way to form a corresponding implementable technical solution.

[0033] Unless otherwise defined, the meanings of the technical terms used in this document are the same as those commonly understood by the person skilled in the art to which the present application belongs; the use of related terms in this document is only for the purpose of describing specific embodiments, and is not intended to limit the present application.

[0034] In the description of the present application, the phrase “and / or” is used to describe the logical relationship between the objects, which means that there can be three relationships, for example, A and / or B, which means that there are three cases: A exists, B exists, and A and B exist at the same time. In addition, the character “ / ” in this document generally represents the logical relationship of “or” between the associated objects before and after it.

[0035] In the present application, the terms such as "first" and "second" are merely used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual number, primary or secondary, or order relationship between the entities or operations.

[0036] In the present application, the "includes", "contains", "has", or other similar expressions used in the statements are intended to cover non-exclusive inclusion, and do not exclude the presence of additional elements in the process, method or product comprising the elements, so that the process, method or product comprising a series of elements can not only include those defined elements, but also include other elements not explicitly listed, or also include elements inherent to such process, method or product.

[0037] As the same understanding as in the "Guidelines for Examination", in the present application, the expressions such as "greater than", "less than", "exceed" are understood as not including the number; the expressions such as "above", "below", "within" are understood as including the number. In addition, in the description of the embodiments of the present application, the meaning of "multiple" is more than two (including two), and similar expressions related to "multiple" are also understood in this way, for example, "multiple groups", "multiple times", etc., unless otherwise explicitly specified.

[0038] In the description of the embodiments of the present application, the spatial-related expressions used, such as "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "perpendicular", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. The indicated orientation or position relationship is based on the orientation or position relationship shown in the specific embodiment or the drawing, and is only for the convenience of describing the specific embodiments of the present application or for the reader to understand, and does not indicate or imply that the indicated device or component must have a specific position, a specific orientation, or be constructed or operated in a specific orientation, and therefore cannot be understood as a limitation on the embodiments of the present application.

[0039] Unless otherwise explicitly specified or limited, in the description of the embodiments of the present application, the terms "mount", "connect", "connect", "fix", "set", etc. should be understood broadly. For example, the "connection" can be a fixed connection, or a detachable connection, or an integral setting; it can be a mechanical connection, or an electrical connection, or a communication connection; it can be directly connected, or indirectly connected through an intermediate medium; it can be the internal communication or interaction relationship of two elements. For those skilled in the art to which the present application belongs, the specific meaning of the above terms in the embodiments of the present application can be understood according to the specific circumstances.

[0040] Please refer to Figures 1 to 5 The embodiment provides a lime slurry pumping device, which comprises a siphon pump 10 and a siphon container 20, wherein the siphon container 20 is provided with a container air release port, a container liquid outlet and a container liquid inlet, the container liquid inlet is communicated to the inside of a pulp tank 30 through a container liquid inlet pipeline, the container liquid inlet is provided with a container liquid inlet valve 201, the container liquid outlet is provided with a container liquid outlet valve 202, the container air release port is communicated to the outside through a container air release pipeline, and the container air release pipeline is provided with a container air release valve 203; the siphon pump 10 is provided with a pump liquid inlet and a pump liquid outlet, the container liquid outlet is communicated to the pump liquid inlet through a container liquid outlet pipeline, the pump liquid outlet is provided with a pump liquid outlet valve 101, and the pump liquid outlet is communicated to a liquid equipment at the rear end through a pump liquid outlet pipeline. The siphon container 20 is further provided with a container water inlet, the container water inlet is provided with a container water inlet valve 204, and the container water inlet is communicated to a process water source. Preferably, the siphon pump 10 and the siphon container 20 are arranged outside the pulp tank 30. The siphon pump 10, the siphon container 20 and the pulp tank 30 are communicated through pipelines, so that cleaning and later maintenance are facilitated. The height of the siphon pump 10 and the siphon container 20 is lower than the liquid level of the lime slurry in the pulp tank 30, so that the stable siphon effect is ensured.

[0041] The siphon pump 10 is a device for automatically conveying liquid by using the gravity and pressure difference of liquid in a pipeline. In the embodiment, the siphon pump 10 is used in cooperation with the siphon container 20 to form a device capable of pumping lime slurry, and the working principle is that air in the pipeline is removed to fill the inside of the pipeline with lime slurry, and then the siphon phenomenon is generated by using the fact that the atmospheric pressure at both ends is equal and the liquid level of the pulp tank 30 is higher than that of the siphon pump 10 and the siphon container 20, so that the lime slurry in the pulp tank 30 is continuously pumped to the liquid level.

[0042] The specific operation process is as follows, the following steps are sequentially performed under the condition that all valves are closed: 1, open the container air release valve 203 of the siphon container 20, the pump inlet valve of the siphon pump 10. 2, open the container water inlet valve of the siphon container 20, so that the siphon container 20 and the siphon pump 10 are filled with water, until water overflows from the container air release port of the siphon container 20, close the container air release valve 203 and the container water inlet valve of the siphon container 20. 3, open the container liquid inlet valve 201 of the siphon container 20, and the pump outlet valve 101 of the siphon pump 10, start the siphon pump 10, start the pump operation, and deliver the lime slurry to the desulfurization and fluorine removal system circulating pool. 4, observe the outlet pressure of the siphon pump 10 to ensure that the pump is operating normally and sufficient flow is generated. 5, after the liquid is completed, stop the siphon pump 10, close the pump inlet valve and the pump outlet valve 101. 6, open the container water inlet valve of the siphon container 20, flush the siphon container 20 and the container liquid inlet pipe, and sequentially close the container liquid inlet valve 201 of the siphon container 20 and the container water inlet valve of the siphon container 20 after flushing. Thus, the siphoning work of the lime slurry is completed.

[0043] The model of the siphon pump 10 can refer to 32UHB-FX-13-10 / 2.2KW, or different models can be replaced according to actual needs, and the new type is not specifically limited.

[0044] The siphon container 20 can adopt a rectangular or cylindrical structure, and can be made of corrosion-resistant and wear-resistant materials, such as high-density polyethylene (HDPE), polypropylene (PP) or stainless steel, to adapt to the chemical properties of the lime slurry and prevent damage to the container. The container air release port is used to adjust the pressure in the container to ensure the occurrence of siphoning. The container water inlet is connected to a process water source for water injection into the siphon container 20. The container liquid outlet is connected to the slurry tank 30 for delivering the lime slurry to the desulfurization and fluorine removal system circulating pool (equivalent to a liquid device). The container liquid inlet is located inside the slurry tank 30 for introducing the lime slurry into the siphon container 20.

[0045] The new type uses a siphon pump 10 instead of a submerged pump, and cooperates with a siphon container 20 to realize siphoning to extract the lime slurry in the slurry tank 30. Since the siphon pump 10 does not need an impeller, it will not be easily blocked like a submerged pump, effectively solving the blocking problem and reducing maintenance costs and operation difficulty.

[0046] In addition, the new type has the following advantages: the design of the siphon container 20 avoids the deposition of slurry at the pump impeller under the action of the stirring device, improving the safety of operation; the siphon pump 10 uses the gravity and pressure difference of the liquid for delivery, without external energy supply, saving energy; due to the simple structure of the siphon pump 10, the number of wearing parts is small, and the maintenance cost is lower than that of the traditional pump; the siphon pump 10 almost does not produce noise during operation, and is friendly to the environment; the operation of the siphon pump 10 does not require complex motor components, simplifying the operation process; the siphon pump 10 can be widely used in many fields, and has broad application prospects; the design of the siphon pump 10 saves the space required by the traditional pump, effectively saving space resources.

[0047] A siphon pump 10 and a siphon container 20 are matched to form a suction group, and a plurality of suction groups are provided. Figure 1 For example, the siphon pump 10 is additionally provided with one, and the corresponding siphon container 20 is additionally provided with one. Through this setting, when one group of suction groups cannot work due to maintenance, repair, etc., another group of suction groups can be started to work to ensure the stable supply of lime slurry. The number of standby suction groups can also be adjusted according to factors such as actual maintenance frequency, average repair period, and lime slurry demand. According to the actual use experience of the applicant, the suction groups can be switched once every quarter.

[0048] In some embodiments, the container liquid inlet valve 201, the container liquid outlet valve 202, the container gas release valve 203, the container water inlet valve, the pump liquid inlet valve and the pump liquid outlet valve 101 can all be solenoid valves. A solenoid valve is an automatic basic element mainly used to control the direction, flow rate, speed and other parameters of fluid. It drives the valve core to move through electromagnetic force to realize the on-off or flow direction control of fluid. The solenoid valve can quickly respond to the on-off of the electromagnetic signal to realize precise control of fluid flow, and is easy to operate and realize automatic control. Further, a controller 40 is also included, which can be a PC or MCU, and the controller 40 is electrically connected to the container liquid inlet valve 201, the container liquid outlet valve 202, the container gas release valve 203, the container water inlet valve, the pump liquid inlet valve and the pump liquid outlet valve 101. Through the controller 40, multiple valves can be directly controlled at one location, which is convenient to operate and effectively improves work efficiency.

[0049] In actual use, it can occur that the pump outlet pressure is abnormally increased due to blockage in the pipeline or inside the pump, and thus damage is caused. Therefore, in some actual examples, a pressure detector 50 is further arranged at the pump outlet. The pressure detector 50 can be a semiconductor pressure sensor, a capacitive pressure sensor or an electromagnetic pressure sensor. The pressure detector 50 can be used to detect the pressure at the pump outlet of the siphon pump 10 in real time, to ensure that the system is operated within a safe pressure range. When an abnormal pressure is detected, an alarm can be sent in time to prevent potential failure. The performance of the siphon pump 10 can be evaluated through pressure data, to determine whether maintenance or replacement of parts is needed. The working state of the pump can also be adjusted according to the data of the pressure detector 50, to optimize the output flow and lift.

[0050] In some examples, a slurry flow meter 60 is further included, which is arranged at the pump outlet of the siphon pump 10 and / or at the container inlet of the siphon container 20. This embodiment can ensure that the siphon pump 10 and the siphon container 20 are operated within the designed parameter range, to ensure safe and effective operation of the system. The flow data can be used to evaluate the performance of the siphon pump 10, such as whether there is blockage, and where the blockage is, to facilitate maintenance. The slurry flow meter 60 can be an electromagnetic flow meter or a gear flow meter.

[0051] After the submersible pump is replaced by the siphon pump in the present application, no blockage occurs during operation, and the blockage phenomenon is completely eliminated. Not only is it ensured that the tail gas meets the emission standard, but also no lye is needed, the operation cost is low, and good economic and environmental benefits are achieved. At the same time, the siphon process and its equipment are simple and easy to operate, which reduces the working intensity of the operators and maintenance personnel, and the device is stable and reliable in operation.

[0052] It should be noted that although the above-mentioned embodiments have been described in the present text, the patent protection scope of the present application is not limited thereby. Therefore, based on the innovative concept of the present application, changes and modifications to the embodiments described in the present text, or equivalent structures or equivalent process transformations made using the content of the present application specification and drawings, directly or indirectly applying the above technical solutions to other related technical fields, are all included in the protection scope of the patent of the present application.

Claims

1. A lime slurry suction device, characterized in that: The system includes a siphon pump and a siphon container. The siphon container has a vent, a water inlet, a liquid outlet, and a liquid inlet. The liquid inlet is connected to the interior of the pulping tank via a liquid inlet pipe. A liquid inlet valve is installed at the liquid inlet, and a liquid outlet valve is installed at the liquid outlet. The vent is connected to the outside via a vent pipe, and a vent valve is installed on the vent pipe. The siphon pump has a pump inlet and a pump outlet. The liquid outlet is connected to the pump inlet via a liquid outlet pipe, and a pump outlet valve is installed at the pump outlet. The pump outlet is connected to downstream liquid-using equipment via a pump outlet pipe. A water inlet valve is installed at the water inlet, and the water inlet is connected to a process water source.

2. The lime slurry suction device according to claim 1, characterized in that: A suction group is formed by combining one siphon pump and one siphon container, and there are multiple suction groups.

3. The lime slurry suction device according to claim 1, characterized in that: The container inlet valve, container outlet valve, container vent valve, container water inlet valve, pump inlet valve, and pump outlet valve can all be solenoid valves.

4. The lime slurry suction device according to claim 2, characterized in that: It also includes a controller, which is electrically connected to the container inlet valve, container outlet valve, container vent valve, container water inlet valve, pump inlet valve, and pump outlet valve, respectively.

5. A lime slurry suction device according to claim 4, characterized in that: A pressure detector is also installed at the pump outlet.

6. A lime slurry suction device according to claim 5, characterized in that: It also includes a slurry flow meter, which is installed at the outlet of the siphon pump and / or the inlet of the siphon container.

7. A lime slurry suction device according to claim 6, characterized in that: The siphon pump and the siphon container are located outside the pulping tank.

8. A lime slurry suction device according to claim 7, characterized in that: The siphon pump and the siphon container are set at a height lower than the liquid level of the lime slurry in the slurry mixing tank.

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