Salt dredging tank system with salt dissolving function

Abstract

The utility model relates to the technical field of molten salt dredging equipment, in particular to a salt dredging tank system with a salt dissolving function. The salt dredging tank is improved on the basis of the salt dredging tank, salt melting is carried out while salt coming from the salt dredging system is received, and the utilization rate of salt melting system equipment is increased. The device comprises a molten salt tank, a salt dredging return pipeline communicated with the molten salt tank, a molten salt supply pipeline and two groups of heating mechanisms symmetrically arranged in the molten salt tank, a feeding port far away from the salt dredging return pipeline and the fused salt supply pipeline is formed in the fused salt tank; the power of the heating mechanism close to the salt dredging return pipeline and the fused salt supply pipeline is greater than that of the heating mechanism close to the feeding port; a stirring mechanism is mounted at the top of the molten salt tank; the stirring mechanism comprises a stirring shaft extending into the molten salt tank and stirring blades fixedly mounted on the stirring shaft, and a driving motor for providing power for rotation of the stirring shaft is fixedly mounted on the molten salt tank.

Description

Technical Field

[0001] This utility model relates to the technical field of molten salt desalination equipment, and in particular to a desalination tank system with salt dissolving function. Background Technology

[0002] Molten salt has good heat absorption and thermal conductivity properties. With the widespread application of molten salt in solar thermal power plants and thermal storage, a large amount of solid molten salt needs to be melted in the early stages of the project. Currently, it is common practice to put a salt melting system into the system at once.

[0003] For example, a Chinese utility model patent discloses an automated molten salt dissolving system (Publication (Announcement) No. CN209362454U), including an automatic feeding device, a salt dissolving device, a molten salt conveying device, a cooling device, and a control system. The salt dissolving device includes a salt dissolving tank and an electric heater, a drain valve, a water vapor discharge component, a stirring component, and a monitoring component installed on the tank. The automatic feeding device is located at the feed end of the salt dissolving tank. The molten salt conveying device includes a molten salt pump and a motor installed on the tank to extract molten salt from it. The cooling device is connected to the stirring component and the molten salt pump respectively and cools them. The control system receives signals monitored by the monitoring component via electrical connection and adjusts the feeding, salt dissolving, and molten salt conveying speeds accordingly. This system can automate the salt dissolving process and prevent molten salt decomposition and pipe blockage.

[0004] However, when the inventors implemented this device, they found the following defects: the molten salt system was basically left idle after one use, resulting in a waste of resources; and its molten salt efficiency needs to be further improved. Utility Model Content

[0005] Technical issues

[0006] To address the shortcomings of existing technologies, this utility model provides an improved salt-removing tank system that enhances the efficiency of molten salt while simultaneously receiving salt from the salt-removing system.

[0007] Technical solution

[0008] To achieve the above objectives, the present invention provides the following technical solution: a salt-removing tank system with salt-dissolving function, comprising a molten salt tank, a salt-removing return pipeline connected to the molten salt tank, a molten salt supply pipeline, and a heating mechanism symmetrically arranged in the molten salt tank;

[0009] A stirring mechanism is installed on the top of the molten salt tank. The molten salt tank is provided with a feed port located away from the salt return pipeline and the molten salt supply pipeline. The stirring mechanism includes a stirring shaft extending into the molten salt tank and stirring blades fixedly installed on the stirring shaft. A drive motor that provides power for the rotation of the stirring shaft is fixedly installed on the molten salt tank.

[0010] Preferably, the heating mechanism comprises two sets, with the heating mechanism near the salt return pipeline and the molten salt supply pipeline having a higher power than the heating mechanism near the feed port.

[0011] Preferably, the heating mechanism comprises two sets, which operate alternately.

[0012] Furthermore, the heating mechanism is preferably an electric heating tube, electric heating rod, etc.; steam heating tubes or other heating mechanisms with equivalent heating effects can also be used; furthermore, both the salt return pipeline and the molten salt supply pipeline are equipped with switching valves.

[0013] Preferably, a stirring mechanism is installed at the top of the molten salt tank; the stirring mechanism includes a stirring shaft extending into the molten salt tank and stirring blades fixedly installed on the stirring shaft, and a drive motor that provides power for the rotation of the stirring shaft is fixedly installed on the molten salt tank; furthermore, multiple sets of axially evenly distributed and inclined flexible scraping blades are installed at the bottom of the stirring shaft.

[0014] Preferably, an exhaust fan communicating with the interior of the molten salt tank is installed on the molten salt tank; further, the exhaust fan is installed at the top center of the molten salt tank.

[0015] Preferably, the stirring mechanism consists of two sets, which are symmetrically arranged on the molten salt tank.

[0016] Preferably, it also includes a conveyor, the discharge end of which is located above the feed port; furthermore, the conveyor can be a belt conveyor or a screw conveyor, or other conveyors with equivalent conveying effect.

[0017] Preferably, the conveyor is a belt conveyor, and a pressure sensor is installed on the belt conveyor; furthermore, the sensing end of the pressure sensor is in close contact with the conveyor belt on the belt conveyor, and the signal output end of the pressure sensor is electrically connected to an external processor and a display.

[0018] Preferably, it also includes a molten salt pump, which is built into the molten salt tank, and the output end of the molten salt pump is connected to the molten salt supply pipeline.

[0019] Preferably, the belt conveyor is detachably connected to the molten salt tank by bolts, and rollers are rotatably installed at the bottom of the belt conveyor.

[0020] (III) Beneficial Effects

[0021] Compared with the prior art, this utility model provides a salt-removing tank system with salt-dissolving function, which has the following beneficial effects: This salt-removing tank system uses two sets of heating mechanisms to heat the molten salt solution on the left and right sides of the molten salt tank respectively, so that the temperature of the molten salt solution near the salt-removing return pipe and the molten salt supply pipe is higher than the temperature of the molten salt solution near the feed port. That is, the temperature of the solution on the left side of the molten salt tank is higher than the temperature of the solution on the right side of the molten salt tank. As the molten salt supply pipe draws out the solution on the left side of the molten salt tank, and the salt-removing return pipe... The reflux of the internal solution and the addition of granular molten salt to the right side of the molten salt tank through the feed port cause a change in the density of the solution on the left and right sides of the molten salt tank. This promotes the flow and diffusion of molten salt molecules from right to left within the molten salt tank. Under these conditions, the molten salt particles dissolve more quickly, effectively preventing the accumulation of solution particles below the feed port and improving the utilization rate of the molten salt system. Under normal conditions, the salt is returned to the molten salt tank through the salt return pipeline, and the molten salt tank is used as a salt removal tank. All components can be reused, effectively saving equipment costs. Attached Figure Description

[0022] Figure 1 This is a three-dimensional structural schematic diagram of the present invention;

[0023] Figure 2 This is a top view of the structure of this utility model;

[0024] Figure 3 This is the utility model Figure 2 Schematic diagram of the cross-sectional structure at point AA;

[0025] Figure 4 This is the utility model Figure 3 A magnified view of the structure at point A in the middle;

[0026] The following are labeled in the attached diagram: 1. Molten salt tank; 2. Salt return pipeline; 3. Molten salt supply pipeline; 4. Heating mechanism; 5. Feed port; 6. Stirring mechanism; 7. Exhaust fan; 8. Belt conveyor; 9. Pressure sensor; 10. Molten salt pump; 11. Roller. Detailed Implementation

[0027] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0028] Please see Figure 1-4This utility model discloses a salt-removing tank system with salt-dissolving function, comprising a molten salt tank 1, a salt-removing return pipe 2 connecting the molten salt tank 1, a molten salt supply pipe 3, and two heating mechanisms 4 symmetrically arranged within the molten salt tank 1; the molten salt tank 1 is provided with a feed port 5 located away from the salt-removing return pipe 2 and the molten salt supply pipe 3, and the power of the heating mechanism 4 located near the salt-removing return pipe 2 and the molten salt supply pipe 3 is greater than the power of the heating mechanism 4 located near the feed port 5; furthermore, the heating mechanism 4 is preferably an electric heating tube, an electric heating rod, etc.; a steam heating tube or other heating mechanism 4 with equivalent heating effect can also be used; furthermore, both the salt-removing return pipe 2 and the molten salt supply pipe 3 are equipped with on / off valves and flow meters; more specifically... The temperature on the side of the molten salt tank 1 adjacent to the salt return pipe 2 and the molten salt supply pipe 3 is 2-3 degrees higher than the temperature on the side adjacent to the feed port 5, so as to form a convection trend. This causes the molten salt molecules that enter the molten salt tank 1 through the feed port 5 to move from the side adjacent to the feed port 5 to the side adjacent to the salt return pipe 2 and the molten salt supply pipe 3, thereby improving the diffusion efficiency of the molten salt molecules and improving the utilization rate of the molten salt system equipment. By controlling the opening size of the switch valves on the salt return pipe 2 and the molten salt supply pipe 3, the flow rate is effectively controlled to ensure the balance of the inflow and outflow of solution and avoid large fluctuations in the solution in the molten salt tank. Under normal conditions, the salt is returned to the molten salt tank 1 through the salt return pipe 2, and the molten salt tank 1 is used as a salt removal tank.

[0029] For details, please refer to Figure 3 A stirring mechanism 6 is installed on the top of the molten salt tank 1. The stirring mechanism 6 includes a stirring shaft extending into the molten salt tank 1 and stirring blades fixedly installed on the stirring shaft. A drive motor that provides power for the rotation of the stirring shaft is fixedly installed on the molten salt tank 1. Furthermore, multiple sets of circumferentially distributed and inclined flexible scraping blades are installed at the bottom of the stirring shaft. During the heating process, by starting the drive motor, the drive motor drives the stirring blades on the stirring shaft to rotate, further improving the flow rate of the solution in the molten salt tank 1, increasing the diffusion speed of molten salt molecules, and accelerating the molten salt dissolution effect. The flexible scraping blades can scrape up the molten salt particles that have settled on the bottom wall of the molten salt tank 1, preventing the molten salt particles from aggregating and settling in the molten salt tank 1, and promoting the molten salt particles to be in a moving state, so as to further improve the molten salt dissolution efficiency.

[0030] Specifically, an exhaust fan 7 connected to the interior of the molten salt tank 1 is installed on the molten salt tank 1; furthermore, the exhaust fan 7 is installed at the top center of the molten salt tank 1; even further, the exhaust fan 7 is preferably a centrifugal fan, and the input end of the exhaust fan 7 is connected to the upper part of the molten salt tank 1. By starting the exhaust fan 7, the steam generated during the salt melting process can be drawn out from the molten salt tank 1, which plays a certain role in relieving pressure and preventing the pressure inside the molten salt tank 1 from being too high; and the exhaust fan 7 is installed at the top of the molten salt tank 1, which can cause the steam on both sides of the molten salt tank 1 to move towards the exhaust fan 7, effectively improving the steam exhaust efficiency and effect.

[0031] Specifically, there are two sets of stirring mechanisms 6, which are symmetrically arranged on the molten salt tank 1. In this embodiment, the two sets of stirring mechanisms 6 rotate synchronously in the same direction during the molten salt melting process to promote the diffusion of molten salt molecules from one side to the other in the molten salt tank 1, thereby accelerating the molten salt melting efficiency. When the molten salt melting operation is completed and the solution needs to be supplied to the outside through the molten salt supply pipeline 3, the two stirring mechanisms 6 rotate synchronously in opposite directions to promote the mixing of the solutions on both sides of the molten salt tank 1, thereby improving the mixing uniformity and temperature uniformity of the molten salt solution and ensuring that the density and temperature of the supplied molten salt solution remain basically constant. More specifically, the automatic steering converter of the drive motor on the stirring mechanism 6 is a conventional and known product on the market, and its specific structure and control principle will not be described in detail here.

[0032] Specifically, it also includes a conveyor, the discharge end of which is located above the feed port 5; furthermore, the conveyor can be a belt conveyor 8 or a screw conveyor, etc., which have the same conveying effect; the solid powder molten salt can be transported to the feed port 5 by the conveyor, thereby improving the convenience of feeding the solid powder molten salt.

[0033] Specifically, the conveyor is a belt conveyor 8, and a pressure sensor 9 is installed on the belt conveyor 8 near the ground. Furthermore, the sensing end of the pressure sensor 9 is in close contact with the conveyor belt on the belt conveyor 8, and the signal output end of the pressure sensor 9 is electrically connected to an external processor and display. The pressure sensor 9 is a commercially available product, and its specific structure and control circuit principle will not be elaborated here. After the fixed powdered molten salt is fed to the belt conveyor 8, the measuring end of the pressure sensor 9 senses the signal and transmits it to the external processor and display. The operator reads the data to measure the amount of solid molten salt fed in real time. The amount of solid powdered molten salt can be appropriately increased or decreased according to actual needs to ensure quantitative addition of solid powdered molten salt and improve the accuracy of solid powder feeding.

[0034] Specifically, it also includes a molten salt pump 10, which is built into the molten salt tank 1. The output end of the molten salt pump 10 is connected to the molten salt supply pipeline 3. After the solution is pressurized by the molten salt pump 10, it is supplied to the required external equipment.

[0035] Specifically, the belt conveyor 8 and the molten salt tank 1 are detachably connected by bolts, and the bottom of the belt conveyor 8 is equipped with a rotating roller 11. When the solid powder molten salt is not being fed, the belt conveyor 8 can be moved by removing the connecting bolts between the belt conveyor 8 and the molten salt tank 1, so as to move the belt conveyor 8 to the required position for use, thereby improving the utilization rate of the belt conveyor 8.

[0036] During use, the salt melting process is as follows: solid powder molten salt is transported to the feed port 5 of the molten salt tank 1 by belt conveyor 8, and water is added at the same time to form an initial molten salt aqueous solution. The heating mechanism 4 is turned on to heat the molten salt aqueous solution, and finally the molten salt is melted into a liquid state and heated into high-temperature molten salt. Solid powder molten salt is continuously transported into the molten salt tank 1. After mixing and melting with the high-temperature molten salt, when the temperature of the molten salt in the molten salt tank 1 meets the requirements, it is transported to the molten salt tank of the external heat storage system by molten salt pump 10. Under normal operating conditions, the molten salt tank 1 receives the salt return liquid from each system.

[0037] It should be noted that the terms "one embodiment," "embodiment," "exemplary embodiment," "some embodiments," etc., mentioned in the specification indicate that the described embodiment may include a specific feature, structure, or characteristic, but not every embodiment necessarily includes that specific feature, structure, or characteristic. Furthermore, such phrases do not necessarily refer to the same embodiment. Moreover, when a specific feature, structure, or characteristic is described in connection with an embodiment, implementing such a feature, structure, or characteristic in conjunction with other embodiments, whether explicitly described or not, is within the knowledge scope of those skilled in the art.

[0038] Furthermore, for ease of explanation, spatially relative terms such as "below," "below," "under," "above," and "above" may be used to describe the relationship of one element or feature relative to other elements or features as shown in the figures. Spatially relative terms are intended to encompass different orientations of the device in use or operation other than those shown in the figures. The device may have other orientations (rotated 90 degrees or in other orientations), and the spatially relative descriptive terms used herein may be interpreted accordingly.

[0039] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this application, and are not intended to limit them. Although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this application.

Claims

1. A salt-absorbing tank system with salt-dissolving function, characterized in that, It includes a molten salt tank (1), a salt return pipeline (2) connecting the molten salt tank (1), a molten salt supply pipeline (3), and a heating mechanism (4) arranged in the molten salt tank (1); A stirring mechanism (6) is installed on the top of the molten salt tank (1). A feed port (5) is provided on the molten salt tank (1) away from the salt return pipe (2) and the molten salt supply pipe (3). The stirring mechanism includes a stirring shaft extending into the molten salt tank and stirring blades fixedly installed on the stirring shaft. A drive motor that provides power for the rotation of the stirring shaft is fixedly installed on the molten salt tank.

2. The salt-dissolving tank system with salt-removing function according to claim 1, characterized in that, The heating mechanism (4) includes two sets. The heating mechanism (4) located near the salt return pipeline (2) and the molten salt supply pipeline (3) has a higher power than the heating mechanism (4) located near the feed port (5).

3. The salt-dissolving tank system with salt-removing function according to claim 1, characterized in that, The heating mechanism (4) comprises two sets, which operate alternately.

4. The salt-dissolving tank system with salt-removing function according to claim 1, characterized in that, The stirring mechanism (6) consists of two sets, which are symmetrically arranged on the molten salt tank (1).

5. The salt-dissolving tank system with salt-removing function according to claim 1, characterized in that, It also includes a conveyor, the discharge end of which is located above the feed port (5).

6. The salt-dissolving tank system with salt-removing function according to claim 5, characterized in that, The conveyor is a belt conveyor (8), and a pressure sensor (9) is installed on the belt conveyor (8).

7. The salt-dissolving tank system with salt-removing function according to claim 1, characterized in that, It also includes a molten salt pump (10), which is built into the molten salt tank (1), and the output end of the molten salt pump (10) is connected to the molten salt supply pipeline (3).

8. The salt-dissolving tank system with salt-removing function according to claim 6, characterized in that, The belt conveyor (8) is detachably connected to the molten salt tank (1) by bolts, and a roller (11) is rotatably installed at the bottom of the belt conveyor (8).

9. The salt-dissolving tank system with salt-removing function according to claim 1, characterized in that, The molten salt tank (1) is equipped with an exhaust fan (7) that communicates with the interior of the molten salt tank (1).

10. The salt-dissolving tank system with salt-removing function according to claim 1, characterized in that, Multiple sets of axially evenly distributed and inclined flexible scraper blades are installed at the bottom of the stirring shaft.

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