A concentrated brine concentrator for the steel industry

Abstract

This utility model relates to the field of concentrated brine technology and discloses a concentrated brine concentration device for the steel industry. The device includes a concentration tank with a cover on top and a concentration assembly inside. In this concentrated brine concentration device, steam contacts the liquid as much as possible before entering the outlet, releasing more latent heat. Compared to direct top dissipation or simple heating, this results in a larger heat exchange area, higher heat utilization, and reduced energy consumption. Simultaneously, the steam pipes are heated to prevent their temperature from falling below the waste liquid temperature, thus avoiding cold spots and preventing salt crystallization on lower surfaces, improving heat exchange efficiency. Regular scraping by a scraper removes initial deposits of crystals or soft scale, preventing further accumulation into hard scale, keeping the steam pipes and concentration tank surface clean, improving heat exchange efficiency, and reducing operating energy consumption.

Description

Technical Field

[0001] This utility model relates to the field of concentrated brine concentration technology, specifically a concentrated brine concentration device for the steel industry. Background Technology

[0002] The steel industry generates a large amount of saline wastewater during production. The main sources include resin regeneration waste liquid from water treatment systems, reverse osmosis concentrate, rinsing water after pickling, drainage from wet desulfurization and flue gas dust removal systems, as well as cooling water discharge and raw material washing wastewater. These wastewaters usually contain high concentrations of inorganic salts and are characterized by high conductivity, strong corrosiveness, and difficulty in biochemical treatment. If discharged directly without treatment, they will cause serious salinization pollution to the environment. They need to be treated and utilized by means of concentration, salt separation, or evaporation crystallization.

[0003] According to a public announcement of a concentrated brine concentration device (Announcement No.: CN222612981U), the above application includes a concentration tank, a drive motor, a main pipeline and a feeding plate. The inner wall of the concentration tank is provided with a support bracket, and a sealed top cover is installed inside the support bracket. A frame is fixed at the upper end of the concentration tank, and a motor seat is provided in the middle of the frame for fixing the drive motor.

[0004] However, in actual use, the above-mentioned equipment requires continuous heating of wastewater to boiling or even supersaturation in order to remove water and crystallize salts through evaporation and crystallization. This process generally has high energy consumption and high operating costs. In view of this, we propose a concentrated brine concentration device for the steel industry. Summary of the Invention

[0005] The purpose of this invention is to provide a concentrated brine device for the steel industry to solve the problems mentioned in the background art.

[0006] To achieve the above objectives, this utility model provides the following technical solution: a concentrated brine concentration device for the steel industry, comprising a concentration tank, a cover on the top of the concentration tank, and a concentration assembly inside the concentration tank, the concentration assembly including:

[0007] An outer can, the interior of which is equipped with a heating block;

[0008] An electric motor, wherein a rotating shaft is fixedly connected to the output end of the motor, and a connecting frame is fixedly connected to the bottom end of the rotating shaft, and the connecting frame is fixedly connected to a steam pipe;

[0009] A vertical rod, the bottom end of which is slidably connected to a guide rail, and a scraper is fixedly connected to the bottom end face of the guide rail.

[0010] Preferably, the outer wall of the outer tank is fixedly connected to a frame, the outer wall of the concentration tank is fixedly connected to a feed inlet, and the outer wall of the concentration tank is fixedly connected to a discharge outlet.

[0011] Preferably, the outer tank is fixedly connected to the outer wall of the concentration tank, and the heating block is fixedly connected to the outer wall of the concentration tank, and the heating block heats the saline wastewater in the concentration tank.

[0012] Preferably, the motor is fixedly connected to the top end face of the cover, the bottom of the concentration tank is fixedly connected to the liquid outlet, and the bottom end of the steam pipe is rotatably connected to the liquid outlet.

[0013] Preferably, a baffle is fixedly connected to the outer wall of the steam pipe, and the baffle is movably connected to the inner wall of the concentration tank. The top of the baffle is at the same horizontal line as the discharge port, so that the concentrated brine can be discharged through the discharge port.

[0014] Preferably, the vertical rod is sleeved with the cover, the scraper is movably connected to the inner wall of the concentration tank, and the scraper is movably connected to the outer wall of the steam pipe.

[0015] Preferably, a scraper ring is fixedly connected to the bottom end face of the scraper, and the inner wall of the scraper ring is movably connected to the outer wall of the steam pipe.

[0016] Compared with the prior art, this utility model provides a concentrated brine concentration device for the steel industry, which has the following beneficial effects:

[0017] 1. This concentrated brine concentration device for the steel industry, through its concentration components, ensures that steam comes into contact with the liquid as much as possible before entering the outlet, releasing more latent heat. Compared to direct top dissipation or simple heating, this results in a larger heat exchange area, higher heat utilization, and reduced energy consumption. Simultaneously, the steam pipes are heated to prevent their temperature from falling below the waste liquid temperature, thus avoiding the formation of cold spots that cause salts to crystallize on lower surfaces, thereby improving heat exchange efficiency. Regular scraping by the scraper plate removes initial deposits of crystals or soft scale, preventing further accumulation into hard scale, keeping the steam pipes and concentration tank surfaces clean, improving heat exchange efficiency, and reducing operating energy consumption.

[0018] 2. This steel industry brine concentration device, with its scraper ring, can more easily cut into and peel off crystalline salt layers or attached scale layers. The triangular cross-section has a wedge-shaped structure, which can form a natural inclined scale removal channel between the steam pipe surface and the scraper ring, making it easy for the scraped crystals or dirt to slide off naturally along the inclined surface. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the main structure of the present utility model;

[0020] Figure 2This is a schematic diagram of the concentration tank structure of this utility model;

[0021] Figure 3 This is a schematic diagram of the steam pipeline structure of this utility model;

[0022] Figure 4 This is a schematic diagram of the scraper structure of this utility model;

[0023] Figure 5 This is a bottom view of the scraper structure of this utility model.

[0024] In the diagram: 1. Concentrator; 2. Cover; 3. Frame; 4. Discharge port; 5. Concentration assembly; 501. Outer tank; 502. Heating block; 503. Motor; 504. Rotating shaft; 505. Connecting frame; 506. Steam pipe; 507. Liquid outlet; 508. Vertical rod; 509. Scraper; 510. Guide rail; 6. Scraper ring. Detailed Implementation

[0025] like Figures 1-5 As shown, this utility model provides a technical solution: a concentrated brine concentration device for the steel industry, including a concentration tank 1, a cover 2 on the top of the concentration tank 1, and a concentration component 5 inside the concentration tank 1. The concentration component 5 includes an outer tank 501, a heating block 502, a motor 503, a rotating shaft 504, a connecting frame 505, a steam pipe 506, a liquid outlet 507, a vertical rod 508, a scraper 509, and a guide rail 510.

[0026] In one embodiment of this utility model, an outer tank 501 is fixedly connected to the outer wall of a concentration tank 1, and a heating block 502 is provided inside the outer tank 501. The heating block 502 is fixedly connected to the outer wall of the concentration tank 1 and heats the saline wastewater in the concentration tank 1.

[0027] The motor 503 is fixedly connected to the top end face of the cover 2. The output end of the motor 503 is fixedly connected to the rotating shaft 504. The bottom end of the rotating shaft 504 is fixedly connected to the connecting bracket 505. The connecting bracket 505 is fixedly connected to the steam pipe 506. The bottom of the concentration tank 1 is fixedly connected to the liquid outlet 507. The bottom end of the steam pipe 506 is rotatably connected to the liquid outlet 507. The outer wall of the steam pipe 506 is fixedly connected to the baffle. The baffle is movably connected to the inner wall of the concentration tank 1. The top of the baffle is at the same horizontal line as the discharge port 4, so that the concentrated brine can be discharged through the discharge port 4.

[0028] The vertical rod 508 is sleeved with the cover 2. The bottom end of the vertical rod 508 is slidably connected to the guide rail 510. The bottom end face of the guide rail 510 is fixedly connected to the scraper 509. The scraper 509 is movably connected to the inner wall of the concentration tank 1 and to the outer wall of the steam pipe 506.

[0029] The outer wall of the outer tank 501 is fixedly connected to the frame 3, the outer wall of the concentration tank 1 is fixedly connected to the inlet, and the outer wall of the concentration tank 1 is fixedly connected to the outlet 4.

[0030] Heating block 502 heats the saline wastewater in concentration tank 1. Motor 503 drives rotating shaft 504 and steam pipe 506 to rotate. Steam pipe 506 stirs the saline wastewater to achieve continuous stirring of the wastewater in the tank, thereby improving heat transfer efficiency, preventing local overheating and crystallization and deposition of salt substances on the tank wall or heating surface, thus ensuring the stability of the evaporation process and the concentration effect.

[0031] Once the wastewater reaches its boiling point, hot steam enters through the top of steam pipe 506 and then flows downwards in the opposite direction, allowing the hot steam to re-enter the wastewater along steam pipe 506. Finally, the hot steam enters the discharge port 4 through the outlet below steam pipe 506. After entering from the top, the steam is guided downwards, passing through a large depth of wastewater area, forming a heat convection path from top to bottom. This allows the steam to contact the liquid as much as possible before entering discharge port 4, releasing more latent heat. Compared to direct top dissipation or simple heating, this method has a larger heat exchange area, higher heat utilization rate, and reduced energy consumption. At the same time, it heats steam pipe 506, preventing its temperature from falling below the wastewater temperature, thus avoiding the formation of cold spots that cause salts to precipitate and crystallize on the lower-temperature surface, thereby improving heat exchange efficiency.

[0032] Pushing the vertical rod 508 downwards further pushes the scraper 509 downwards, causing the scraper 509 to scrape the inner wall of the concentration tank 1 and the outer wall of the steam pipe 506. The scraper 509 scrapes regularly, which can remove the initial attached crystals or soft scale in time, prevent it from accumulating into hard scale, keep the surface of the steam pipe 506 and the concentration tank 1 clean, improve heat exchange efficiency, and reduce operating energy consumption.

[0033] In addition, a scraper ring 6 is fixedly connected to the bottom end face of the scraper 509. The inner wall of the scraper ring 6 is movably connected to the outer wall of the steam pipe 506. The cross-section of the scraper ring 6 is triangular. The triangular cross-section of the scraper ring 6 has the characteristics of sharp corners or sharp edges, narrower contact line, greater pressure per unit length, and easier to cut into and peel off the crystallized salt layer or attached scale layer. The triangular cross-section has the characteristics of wedge structure, which can form a natural inclined scale removal channel between the surface of the steam pipe 506 and the scraper ring 6, making it easy for the scraped crystals or dirt to slide down naturally along the inclined surface, and not easy to block the area of ​​the scraper ring 6, thus realizing automatic descaling and crystal removal.

[0034] In this invention, during use, the heating block 502 heats the saline wastewater in the concentration tank 1. The motor 503 drives the rotating shaft 504 and the steam pipe 506 to rotate. The steam pipe 506 stirs the saline wastewater, achieving continuous stirring of the wastewater in the tank to improve heat transfer efficiency. After the wastewater reaches its boiling point, hot steam enters through the top of the steam pipe 506 and then flows downwards in the opposite direction, allowing the hot steam to re-enter the wastewater along the steam pipe 506. Finally, the hot steam enters the discharge port 4 through the outlet at the bottom of the steam pipe 506. After entering from the top, the steam is guided downwards, passing through a large wastewater area, forming a heat convection path from top to bottom. This allows the steam to come into contact with the liquid as much as possible before entering the outlet 4, releasing more latent heat. This pushes the vertical rod 508 downwards, further pushing the scraper 509 downwards. The scraper 509 scrapes the inner wall of the concentration tank 1 and the outer wall of the steam pipe 506. The scraper 509 scrapes regularly, which can remove the initial attached crystals or soft scale in time, preventing further accumulation into hard scale and keeping the surface of the steam pipe 506 and the concentration tank 1 clean.

[0035] The present invention has been described in detail above. However, modifications or improvements can be made to it, which will be obvious to those skilled in the art. Therefore, any modifications or improvements that do not depart from the spirit of the present invention are within the protection scope of the present invention.

Claims

1. A concentrated brine concentration device for the steel industry, comprising a concentration tank (1), wherein the top of the concentration tank (1) is provided with a cover (2), characterized in that: The concentration tank (1) is equipped with a concentration assembly (5), which includes: An outer tank (501) is provided with a heating block (502) inside the outer tank (501); The motor (503) has a rotating shaft (504) fixedly connected to its output end, and a connecting frame (505) fixedly connected to the bottom end of the rotating shaft (504). The connecting frame (505) is fixedly connected to the steam pipe (506). A vertical rod (508) is slidably connected to a guide rail (510) at its bottom end, and a scraper (509) is fixedly connected to the bottom end face of the guide rail (510).

2. The concentrated brine device for the steel industry according to claim 1, characterized in that: The outer wall of the outer tank (501) is fixedly connected to a frame (3), the outer wall of the concentration tank (1) is fixedly connected to a feed inlet, and the outer wall of the concentration tank (1) is fixedly connected to a discharge outlet (4).

3. The concentrated brine device for the steel industry according to claim 1, characterized in that: The outer tank (501) is fixedly connected to the outer wall of the concentration tank (1), and the heating block (502) is fixedly connected to the outer wall of the concentration tank (1).

4. The concentrated brine device for the steel industry according to claim 1, characterized in that: The motor (503) is fixedly connected to the top end face of the cover (2), the bottom of the concentration tank (1) is fixedly connected to the liquid outlet (507), and the bottom end of the steam pipe (506) is rotatably connected to the liquid outlet (507).

5. A concentrated brine concentrator for the steel industry according to claim 1, characterized in that: A baffle is fixedly connected to the outer wall of the steam pipe (506), and the baffle is movably connected to the inner wall of the concentration tank (1).

6. A concentrated brine concentrator for the steel industry according to claim 1, characterized in that: The vertical rod (508) is sleeved with the cover (2), the scraper (509) is movably connected to the inner wall of the concentration tank (1), and the scraper (509) is movably connected to the outer wall of the steam pipe (506).

7. A concentrated brine concentrator for the steel industry according to claim 1, characterized in that: The bottom end face of the scraper (509) is fixedly connected to a scraper ring (6), and the inner wall of the scraper ring (6) is movably connected to the outer wall of the steam pipe (506).

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