A desulfurization wastewater magnesium resourceful zero-emission treatment device

Abstract

The application provides a magnesium resource utilization zero-emission treatment device for desulfurization wastewater, and belongs to the technical field of wastewater treatment. The device comprises a distillation tank, a tank cover, a first driving assembly, a crushing assembly, a scraping assembly, a second driving assembly and a containing plate. A heating assembly is arranged in the distillation tank, and is used for heating the desulfurization wastewater in the distillation tank. The containing plate is movably arranged in the distillation tank, and is used for containing the magnesium sulfate solid formed after the wastewater is distilled. The tank cover is hingedly arranged on the top of the distillation tank, and the bottom of the tank cover is connected with the containing plate through a pull rod. The first driving assembly is installed on the outer wall of the distillation tank, and is used for driving the tank cover to rotate relative to the distillation tank. Compared with the prior art, the magnesium sulfate solid formed in the distillation tank can be conveniently collected after the magnesium sulfate wastewater is distilled, so that the treatment efficiency of the magnesium sulfate wastewater is improved.

Description

Technical Field

[0001] This invention belongs to the field of wastewater treatment technology, specifically a zero-discharge treatment device for magnesium resource utilization in desulfurization wastewater. Background Technology

[0002] Magnesium-based desulfurization utilizes magnesium compounds (commonly magnesium oxide and magnesium hydroxide) to neutralize sulfur dioxide in the flue gas from coal-fired boilers, followed by air oxidation to form a magnesium sulfate solution. This method is widely used due to its advantages such as high desulfurization efficiency and low equipment investment. The main component of the mother liquor after desulfurization is magnesium sulfate, and direct discharge of high-concentration magnesium sulfate wastewater has a significant impact on soil and water bodies.

[0003] In the existing technology, the mainstream treatment method for magnesium sulfate wastewater is distillation. This involves passing the magnesium sulfate wastewater into a distillation vessel, heating it to evaporate the wastewater, and leaving magnesium sulfate solids inside the distillation vessel. However, the magnesium sulfate solids left after evaporation tend to clump together at the bottom of the distillation vessel. The clumps of magnesium sulfate solids are in close contact with the bottom of the distillation vessel, making it difficult for workers to collect them, thus affecting the treatment efficiency of magnesium sulfate wastewater. Summary of the Invention

[0004] In view of the shortcomings of the prior art, the technical problem to be solved by the embodiments of the present invention is to provide a zero-discharge treatment device for magnesium resource utilization in desulfurization wastewater.

[0005] To solve the above-mentioned technical problems, the present invention provides the following technical solution:

[0006] A zero-discharge treatment device for magnesium resource recovery from desulfurization wastewater includes a distillation tank, a tank cover, a first drive assembly, a crushing assembly, a scraping assembly, a second drive assembly, and a holding plate.

[0007] The distillation tank is equipped with a heating component for heating the desulfurization wastewater inside the distillation tank.

[0008] The holding plate is movably disposed inside the distillation tank and is used to hold the magnesium sulfate solid formed after wastewater distillation.

[0009] The lid is hinged to the top of the distillation tank, and the bottom of the lid is connected to the holding plate via a pull rod. The first drive assembly is mounted on the outer wall of the distillation tank and is used to drive the lid to rotate relative to the distillation tank. When the lid rotates, it drives the holding plate to move upward via the pull rod.

[0010] The crushing assembly and the scraping assembly are disposed on the upper part of the holding plate, and the second driving assembly is installed at the bottom of the box cover. When the holding plate moves upward, the second driving assembly drives the crushing assembly and the scraping assembly to move along the upper part of the holding plate.

[0011] When the crushing component moves, it crushes the magnesium sulfate solid material that has hardened on the upper part of the holding plate, and when the scraping component moves, it scrapes the crushed magnesium sulfate solid material toward the edge of the holding plate.

[0012] As a further improvement of the present invention: the crushing assembly includes a crushing roller and a plurality of crushing teeth fixedly disposed on the circumferential sidewall of the crushing roller, the crushing roller being attached to the upper part of the holding plate.

[0013] The second drive assembly includes a telescopic sleeve, a telescopic rod, and an elastic element.

[0014] The upper end of the telescopic sleeve is fixedly connected to the bottom of the box cover, and the lower end is sleeved on the outside of the telescopic rod and cooperates with the telescopic rod in telescopic movement. A U-shaped bracket is fixedly provided at the lower end of the telescopic rod, the crushing roller is rotatably arranged inside the U-shaped bracket, and the elastic element is arranged inside the telescopic sleeve to provide elastic support for the telescopic rod.

[0015] As a further improvement of the present invention: a rotating shaft is fixedly provided at the end of the crushing roller, and the end of the rotating shaft away from the crushing roller passes through the U-shaped bracket and rotates in cooperation with the U-shaped bracket.

[0016] The scraping assembly includes a scraper blade and a connecting plate.

[0017] The scraper is disposed on one side of the crushing roller, with the bottom of the scraper attached to the upper surface of the holding plate. One end of the connecting plate is fixedly connected to the scraper, and the other end is sleeved on the outside of the rotating shaft and rotates in cooperation with the rotating shaft.

[0018] As a further improvement of the present invention: the elastic element is a spring or a metal sheet.

[0019] As a further improvement of the present invention: a slide rail is fixedly provided on the upper edge of the holding plate, the upper end of the pull rod is hinged to the bottom of the box cover, and a slider is fixedly provided on the lower end, the slider slidingly engaging with the slide rail.

[0020] As a further improvement of the present invention: the size of the holding plate is the same as the size of the inner cavity of the distillation tank.

[0021] As a further improvement of the present invention: the heating component is an electric heating plate embedded in the inner side wall of the distillation tank.

[0022] Compared with the prior art, the beneficial effects of the present invention are:

[0023] In this embodiment of the invention, when magnesium sulfate wastewater needs to be distilled, the wastewater can be placed inside a distillation tank, and then heated using a heating component to evaporate the wastewater. After evaporation, magnesium sulfate solids form on the upper part of the holding plate. Subsequently, a first driving component drives the tank lid to rotate relative to the distillation tank, thereby opening the top of the distillation tank. When the tank lid rotates, a pull rod pulls the holding plate upwards along the inside of the distillation tank. As the holding plate moves upwards, a second driving component drives a crushing component and a scraping component to move along the upper part of the holding plate. The crushing component crushes the magnesium sulfate solids that have hardened on the upper part of the holding plate, and then the scraping component scrapes the crushed magnesium sulfate solids towards the edge of the holding plate. After the holding plate moves to the top of the distillation tank, the operator can collect the magnesium sulfate solids that have been scraped to the edge of the holding plate, thereby achieving the collection of magnesium sulfate solids. Compared with the prior art, after the magnesium sulfate wastewater is distilled, the magnesium sulfate solids formed inside the distillation tank can be conveniently collected, thereby improving the treatment efficiency of magnesium sulfate wastewater. Attached Figure Description

[0024] Figure 1 A schematic diagram of a zero-discharge treatment device for magnesium resource utilization in desulfurization wastewater. Figure 1 ;

[0025] Figure 2 A schematic diagram of a zero-discharge treatment device for magnesium resource utilization in desulfurization wastewater. Figure 2 ;

[0026] Figure 3 for Figure 2 Enlarged view of region A in the middle;

[0027] Figure 4 for Figure 2 Enlarged view of region B in the middle;

[0028] In the diagram: 10-Distillation tank, 20-Lid, 201-Pull rod, 202-Slider, 30-First drive assembly, 40-Crushing assembly, 401-Crushing roller, 402-Crushing teeth, 403-Rotating shaft, 50-Scraping assembly, 501-Scraping plate, 502-Connecting plate, 60-Second drive assembly, 601-Telescopic sleeve, 602-Telescopic rod, 603-U-shaped bracket, 604-Elastic element, 70-Container plate, 701-Slide rail. Detailed Implementation

[0029] The technical solution of the present invention will be further described in detail below with reference to specific embodiments.

[0030] Embodiments of the present invention are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and should not be construed as limiting the present invention.

[0031] Please see Figure 1 This embodiment provides a zero-discharge treatment device for magnesium resource utilization in desulfurization wastewater, including a distillation tank 10, a tank cover 20, a first drive assembly 30, a crushing assembly 40, a scraping assembly 50, a second drive assembly 60, and a holding plate 70. The distillation tank 10 is equipped with a heating assembly (not shown in the figure) for heating the desulfurization wastewater inside the distillation tank 10. The holding plate 70 is movably disposed inside the distillation tank 10 for holding the magnesium sulfate solids formed after wastewater distillation. The tank cover 20 is hinged to the top of the distillation tank 10, and the bottom of the tank cover 20 is connected to the holding plate 70 via a pull rod 201. The first drive assembly 30 is installed in the distillation tank 10. On the outer wall of the distillation tank 10, the lid 20 is rotated relative to the tank 10. When the lid 20 rotates, the holding plate 70 is moved upward via the pull rod 201. The crushing component 40 and the scraping component 50 are disposed on the upper part of the holding plate 70. The second driving component 60 is installed at the bottom of the lid 20. When the holding plate 70 moves upward, the second driving component 60 is used to drive the crushing component 40 and the scraping component 50 to move along the upper part of the holding plate 70. When the crushing component 40 moves, it crushes the magnesium sulfate solid material that has hardened on the upper part of the holding plate 70. When the scraping component 50 moves, it scrapes the crushed magnesium sulfate solid material toward the edge of the holding plate 70.

[0032] When magnesium sulfate wastewater needs to be distilled, the wastewater can be placed inside the distillation tank 10, and then heated by the heating component to evaporate the wastewater. After evaporation, magnesium sulfate solids will form on the upper part of the holding plate 70. Then, the first drive component 30 drives the tank cover 20 to rotate relative to the distillation tank 10, thereby opening the top of the distillation tank 10. When the tank cover 20 rotates, it pulls the holding plate 70 upward along the inside of the distillation tank 10 through the pull rod 201. When the holding plate 70 moves upward, the second drive component 60 drives the crushing component 40 and the scraping component 50 to move along the upper part of the holding plate 70. The crushing component 40 crushes the magnesium sulfate solids that have hardened on the upper part of the holding plate 70. Then, the scraping component 50 scrapes the crushed magnesium sulfate solids towards the edge of the holding plate 70. After the holding plate 70 moves to the top of the distillation tank 10, the staff can collect the magnesium sulfate solids that have been scraped to the edge of the holding plate 70, thereby realizing the collection of magnesium sulfate solids.

[0033] Please see Figure 2 as well as Figure 4 In one embodiment, the crushing assembly 40 includes a crushing roller 401 and a plurality of crushing teeth 402 fixedly disposed on the circumferential sidewall of the crushing roller 401. The crushing roller 401 is attached to the upper part of the holding plate 70. The second driving assembly 60 includes a telescopic sleeve 601, a telescopic rod 602, and an elastic element 604. The upper end of the telescopic sleeve 601 is fixedly connected to the bottom of the box cover 20, and the lower end is sleeved on the outside of the telescopic rod 602 and telescopically cooperates with the telescopic rod 602. A U-shaped bracket 603 is fixedly disposed at the lower end of the telescopic rod 602. The crushing roller 401 is rotatably disposed inside the U-shaped bracket 603. The elastic element 604 is disposed inside the telescopic sleeve 601 and is used to provide elastic support for the telescopic rod 602.

[0034] During the heating process of the heating assembly to heat the wastewater inside the distillation tank 10, the tank cover 20 is closed on the upper part of the distillation tank 10, the telescopic sleeve 601 and the telescopic rod 602 remain in a vertical state, the elastic element 604 is in a compressed state, and the crushing roller 401 is located at one end of the upper part of the holding plate 70. After the wastewater has evaporated, the first drive assembly 30 drives the tank cover 20 to rotate relative to the distillation tank 10. When the tank cover 20 rotates, on the one hand, it pulls the holding plate 70 upward along the inside of the distillation tank 10 through the pull rod 201, and on the other hand, it drives the telescopic sleeve 601 and the telescopic rod 602 to rotate synchronously. The telescopic sleeve 601 and the telescopic rod 602 rotate from a vertical state to a horizontal state. In the tilted state, the elastic element 604 pushes the telescopic rod 602 to move outward of the telescopic sleeve 601, and then drives the crushing roller 401 to roll along the upper part of the holding plate 70 through the U-shaped bracket 603. When the crushing roller 401 rolls, several crushing teeth 402 on its circumferential sidewall act on the magnesium sulfate solid material that has hardened on the upper part of the holding plate 70, thereby crushing the hardened magnesium sulfate solid material. When the box cover 20 is rotated to a certain angle, the holding plate 70 is pulled to the top position of the distillation tank 10. At this time, the crushing roller 401 rolls from one end of the upper part of the holding plate 70 to the other end, thereby completely crushing the magnesium sulfate solid material that has hardened on the upper part of the holding plate 70.

[0035] Please see Figure 2 as well as Figure 3 In one embodiment, a rotating shaft 403 is fixedly provided at the end of the crushing roller 401. The end of the rotating shaft 403 away from the crushing roller 401 passes through the U-shaped bracket 603 and is rotatably engaged with the U-shaped bracket 603. The scraping assembly 50 includes a scraper 501 and a connecting plate 502. The scraper 501 is disposed on one side of the crushing roller 401. The bottom of the scraper 501 is in contact with the upper surface of the holding plate 70. One end of the connecting plate 502 is fixedly connected to the scraper 501, and the other end is sleeved on the outside of the rotating shaft 403 and is rotatably engaged with the rotating shaft 403.

[0036] When the telescopic rod 602 is tilted and the elastic element 604 pushes the telescopic rod 602 to move outward of the telescopic sleeve 601, the telescopic rod 602 drives the crushing roller 401 to roll along the upper part of the holding plate 70 through the U-shaped bracket 603 to crush the clumped magnesium sulfate solid. When the crushing roller 401 rolls, it pulls the connecting plate 502 through the rotating shaft 403, which in turn drives the scraper 501 to slide synchronously against the upper surface of the holding plate 70. When the scraper 501 slides, it scrapes the crushed magnesium sulfate solid towards the edge of the holding plate 70, so that the holding plate 70 moves up to the top of the distillation tank 10, making it convenient for the staff to collect the magnesium sulfate solid.

[0037] In one embodiment, the elastic element 604 can be a spring or a metal sheet, and there is no limitation here.

[0038] Please see Figure 2 In one embodiment, a slide rail 701 is fixedly provided on the upper edge of the holding plate 70, the upper end of the pull rod 201 is hinged to the bottom of the box cover 20, and a slider 202 is fixedly provided on the lower end, the slider 202 and the slide rail 701 are slidably engaged.

[0039] When the lid 20 rotates relative to the distillation tank 10 to open the top position of the distillation tank 10, the lid 20 pulls the holding plate 70 through the pull rod 201, causing the holding plate 70 to move upward along the inside of the distillation tank 10. During this process, the upper end of the pull rod 201 rotates relative to the lid 20, and the lower end of the pull rod 201 drives the slider 202 to slide adaptively along the slide rail 701.

[0040] In one embodiment, the size of the holding plate 70 is the same as the size of the inner cavity of the distillation tank 10, so that the side wall of the holding plate 70 can be in close contact with the inner wall of the distillation tank 10. In this way, when the holding plate 70 moves upward along the inside of the distillation tank 10, the holding plate 70 can also scrape off a small amount of magnesium sulfate solids adhering to the side wall of the distillation tank 10 in a timely manner, thereby realizing automatic cleaning of the inner side wall of the distillation tank 10.

[0041] In one embodiment, the first drive component 30 may be a hydraulic rod or a linear motor, and there is no limitation on this.

[0042] In one embodiment, the heating component is an electric heating plate embedded in the inner side wall of the distillation tank 10.

[0043] In this embodiment of the invention, when magnesium sulfate wastewater needs to be distilled, the wastewater can be placed inside the distillation tank 10, and then heated by a heating component to evaporate the wastewater. After evaporation, magnesium sulfate solids can be formed on the upper part of the holding plate 70. Subsequently, the first driving component 30 drives the tank cover 20 to rotate relative to the distillation tank 10, thereby opening the top of the distillation tank 10. When the tank cover 20 rotates, it pulls the holding plate 70 upward along the inside of the distillation tank 10 via the pull rod 201. As the holding plate 70 moves upward, the second driving component 60 drives the crushing component 40 and the scraping component 50 along the holding plate. The upper part of plate 70 moves, and the crushing component 40 crushes the magnesium sulfate solids that have hardened on the upper part of plate 70. Then, the scraping component 50 scrapes the crushed magnesium sulfate solids to the edge of plate 70. After plate 70 moves to the top of distillation tank 10, the staff can collect the magnesium sulfate solids that have been scraped to the edge of plate 70, thus realizing the collection of magnesium sulfate solids. Compared with the existing technology, after the magnesium sulfate wastewater is distilled, the magnesium sulfate solids formed inside distillation tank 10 can be conveniently collected, thereby improving the treatment efficiency of magnesium sulfate wastewater.

[0044] It will be apparent to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the invention can be implemented in other specific forms without departing from its spirit or essential characteristics. Therefore, the embodiments should be considered illustrative and non-limiting in all respects, and the scope of the invention is defined by the appended claims rather than the foregoing description. Thus, all variations falling within the meaning and scope of equivalents of the claims are intended to be included within the present invention, and no reference numerals in the claims should be construed as limiting the scope of the claims.

[0045] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity, and those skilled in the art should consider the specification as a whole.

Claims

1. A zero-discharge treatment device for magnesium resource recovery from desulfurization wastewater, characterized in that, Includes a distillation tank, a lid, a first drive assembly, a crushing assembly, a scraping assembly, a second drive assembly, and a holding plate. The distillation tank is equipped with a heating component for heating the desulfurization wastewater inside the distillation tank. The holding plate is movably disposed inside the distillation tank and is used to hold the magnesium sulfate solid formed after wastewater distillation. The lid is hinged to the top of the distillation tank, and the bottom of the lid is connected to the holding plate via a pull rod. The first drive assembly is mounted on the outer wall of the distillation tank and is used to drive the lid to rotate relative to the distillation tank. When the lid rotates, it drives the holding plate to move upward via the pull rod. The crushing assembly and the scraping assembly are disposed on the upper part of the holding plate, and the second driving assembly is installed at the bottom of the box cover. When the holding plate moves upward, the second driving assembly drives the crushing assembly and the scraping assembly to move along the upper part of the holding plate. As the crushing component moves, it crushes the magnesium sulfate solid material that has clung to the upper part of the holding plate. As the scraping component moves, it scrapes the crushed magnesium sulfate solid material towards the edge of the holding plate. The crushing assembly includes a crushing roller and a plurality of crushing teeth fixedly disposed on the circumferential sidewall of the crushing roller, the crushing roller being fitted against the upper part of the holding plate. The second drive assembly includes a telescopic sleeve, a telescopic rod, and an elastic element. The upper end of the telescopic sleeve is fixedly connected to the bottom of the box cover, and the lower end is sleeved on the outside of the telescopic rod and engages with the telescopic rod in telescopic cooperation. A U-shaped bracket is fixedly installed at the lower end of the telescopic rod, and the crushing roller is rotatably installed inside the U-shaped bracket. The elastic element is installed inside the telescopic sleeve to provide elastic support for the telescopic rod. A rotating shaft is fixedly installed at the end of the crushing roller. The end of the rotating shaft away from the crushing roller passes through the U-shaped bracket and is rotatably engaged with the U-shaped bracket. The scraping assembly includes a scraper blade and a connecting plate. The scraper is disposed on one side of the crushing roller, with the bottom of the scraper attached to the upper surface of the holding plate. One end of the connecting plate is fixedly connected to the scraper, and the other end is sleeved on the outside of the rotating shaft and rotates in cooperation with the rotating shaft.

2. The zero-discharge treatment device for magnesium resource utilization of desulfurization wastewater according to claim 1, characterized in that, The elastic element is a spring or a metal sheet.

3. The zero-discharge treatment device for magnesium resource utilization of desulfurization wastewater according to claim 1, characterized in that, A slide rail is fixedly installed on the upper edge of the holding plate. The upper end of the pull rod is hinged to the bottom of the box cover, and a slider is fixedly installed at the lower end. The slider slides in cooperation with the slide rail.

4. The zero-discharge treatment device for magnesium resource utilization of desulfurization wastewater according to claim 1, characterized in that, The size of the holding plate is the same as the size of the inner cavity of the distillation tank.

5. The zero-discharge treatment device for magnesium resource utilization of desulfurization wastewater according to claim 1, characterized in that, The heating component is an electric heating plate embedded in the inner side wall of the distillation tank.

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