Low-temperature evaporation treatment device for high-salinity wastewater

Abstract

The utility model discloses a low-temperature evaporation treatment device for high-salinity wastewater. The low-temperature evaporation treatment device comprises a horizontal container, a motor, a stirring shaft, a stirring rod and a scraping plate, the horizontal container is provided with a jacket through which a high-temperature medium can enter and exit; the stirring shaft is rotatably connected into the horizontal container and is coaxial with the horizontal container; one end of the stirring shaft penetrates through the end face of the horizontal container and is connected with the power output end of the motor; the scraping plate is fixed on the stirring shaft through a connecting framework and is spirally arranged along the axial direction of the stirring shaft, the scraping plate is in contact with the inner wall of the horizontal container, and the scraping plate can push solid materials to move towards one side of the discharge port when the stirring shaft rotates at any time; at least one stirring rod is arranged in each screw pitch of the scraping plate, the stirring rods extend in the radial direction of the stirring shaft, and gaps are reserved between the stirring rods and the inner wall of the horizontal container. With the adoption of the device, salt crystals on the inner wall of the container can be scraped in the evaporation reaction process, so that the heat transfer effect is prevented from becoming poor due to scaling, the evaporation reaction time is shortened, and the cost of using a high-temperature medium is saved.

Description

Technical Field

[0001] The utility model belongs to the technical field of environmental protection treatment equipment, and specifically relates to a low-temperature evaporation treatment device for high-salt wastewater. Background Art

[0002] Low temperature evaporation treatment device is an efficient and environmentally friendly wastewater treatment technology. It evaporates the water in the wastewater by low temperature evaporation, thereby reducing the volume and concentration of the wastewater. This equipment is widely used in industrial production to treat wastewater, which can effectively reduce the discharge of wastewater and achieve the purpose of environmental protection and energy saving.

[0003] The application scope of low-temperature evaporation technology is very wide, including but not limited to metal processing wastewater, chemical wastewater, electroplating wastewater, etc. Its principle is to achieve evaporation under low temperature conditions. The commonly used temperature range is 30-95℃, which is much lower than the boiling point of water 100℃, so it is called low-temperature evaporation technology.

[0004] However, during the evaporation reaction process, existing low-temperature evaporation treatment devices are prone to scaling on the inner wall of the container. Scaling will form an insulating layer on the inner wall of the evaporator, which will reduce the heat transfer efficiency and require more energy to maintain the evaporation process. Utility Model Content

[0005] The problem to be solved by the utility model is to provide a low-temperature evaporation treatment device for high-salt wastewater, which can scrape off salt crystals on the inner wall of the container during the evaporation reaction, avoid the deterioration of heat transfer effect due to scaling, shorten the evaporation reaction time, and save the cost of using high-temperature media.

[0006] In order to solve the above technical problems, the utility model provides a low-temperature evaporation treatment device for high-salt wastewater, which includes a horizontal container, a motor, a stirring shaft, a stirring rod and a scraper; the horizontal container is provided with a feed port, a discharge port and an exhaust port, the feed port is arranged at the front end of the horizontal container, and the discharge port and the exhaust port are both arranged at the rear end of the horizontal container; the outer periphery of the horizontal container is coaxially sleeved with a jacket, and the jacket is provided with a medium inlet and a medium outlet for high-temperature medium to enter and exit; the stirring shaft is rotatably connected to the horizontal container and is connected to the horizontal container. The horizontal container is coaxially arranged; one end of the stirring shaft passes through the end surface of the horizontal container and is connected to the power output end of the motor; the scraper is fixed to the stirring shaft through a connecting frame and is spirally arranged along the axial direction of the stirring shaft, the scraper is in contact with the inner wall of the horizontal container, and the scraper can push the solid material to move to the side of the discharge port when the stirring shaft rotates at any time; at least one stirring rod is arranged in each pitch of the scraper, the stirring rod extends radially from the stirring shaft, and a gap is left between the stirring rod and the inner wall of the horizontal container.

[0007] As a preferred solution of the utility model, four stirring rods are provided in each pitch of the scraper, and the four stirring rods are arranged at equal intervals along the circumferential direction of the stirring shaft.

[0008] As a preferred solution of the utility model, the exhaust port is connected to a condenser for condensing steam into water.

[0009] As a preferred solution of the utility model, a demister is provided between the exhaust port and the condenser.

[0010] As a preferred solution of the utility model, the condensate outlet of the condenser is connected to a liquid storage tank.

[0011] As a preferred solution of the utility model, a valve and a water pump are provided between the condensed water outlet of the condenser and the liquid storage tank.

[0012] As a preferred solution of the utility model, the feed port is arranged at the front end top of the horizontal container; the discharge port is arranged at the rear end bottom of the horizontal container; and the exhaust port is arranged at the rear end top of the horizontal container.

[0013] As a preferred solution of the utility model, the scraper is made of silicone or rubber.

[0014] As a preferred solution of the present invention, the material of the connecting skeleton is titanium.

[0015] Compared with the prior art, the low-temperature evaporation treatment device for high-salt wastewater of the utility model has the following beneficial effects:

[0016] The low-temperature evaporation treatment device of the utility model uses a high-temperature medium to pass into a jacket to increase the temperature, and continuously stirs the material through a stirring rod to make the temperature of the material uniform. As the temperature gradually rises, precipitated salt crystals adhere to the inner wall of the container. At this time, the scraper can scrape the salt crystals on the inner wall of the container to avoid the deterioration of the heat transfer effect due to scaling, shorten the evaporation reaction time, and save the cost of using high-temperature media; in addition, the scraper is a spiral structure, and while scraping the salt crystals on the inner wall of the container, the scraper can push the salt crystals to the side of the discharge port for easy discharge. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the technical solution of the embodiment of the utility model, the drawings of the embodiment will be briefly introduced below.

[0018] Figure 1 It is a structural schematic diagram of a low-temperature evaporation treatment device for high-salinity wastewater provided by an embodiment of the utility model;

[0019] Figure 2 It is a connection structure diagram of the stirring rod and the scraper.

[0020] Markings in the figure:

[0021] Horizontal container 1; motor 2; stirring shaft 3; stirring rod 4; scraper 5; feed port 6; discharge port 7; exhaust port 8; jacket 9; medium inlet 10; medium outlet 11; connecting frame 12; condenser 13; demister 14; liquid storage tank 15; valve 16; water pump 17. DETAILED DESCRIPTION

[0022] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0023] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like used in the present invention to indicate the orientation or position relationship is based on the orientation or position relationship shown in the drawings, and is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operate in a specific orientation, and therefore cannot be understood as a limitation on the present invention. In addition, the terms "first", "second", and "third" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance.

[0024] like Figure 1 and Figure 2 Shown is a preferred embodiment of the utility model.

[0025] A low-temperature evaporation treatment device for high-salinity wastewater, comprising a horizontal container 1, a motor 2, a stirring shaft 3, a stirring rod 4 and a scraper 5; the horizontal container 1 is provided with a feed port 6, a discharge port 7 and an exhaust port 8, the feed port 6 is arranged at the front end of the horizontal container 1, the discharge port 7 and the exhaust port 8 are both arranged at the rear end of the horizontal container 1; the outer periphery of the horizontal container 1 is coaxially sleeved with a jacket 9, the jacket 9 is provided with a medium inlet 10 and a medium outlet 11 for high-temperature medium to enter and exit; the stirring shaft 3 is rotatably connected to the horizontal container 1 and is coaxial with the horizontal container 1 The scraper 5 is fixed on the stirring shaft 3 through the end surface of the horizontal container 1 and is connected to the power output end of the motor 2; the scraper 5 is fixed on the stirring shaft 3 through the connecting frame 12 and is arranged in a spiral shape along the axial direction of the stirring shaft 3, the scraper 5 contacts the inner wall of the horizontal container 1, and the scraper 5 can push the solid material to move to the side of the discharge port when the stirring shaft 3 rotates at any time; at least one stirring rod 4 is provided in each pitch of the scraper 5, and the stirring rod 4 extends radially from the stirring shaft 3, and a gap is left between the stirring rod 4 and the inner wall of the horizontal container 1. In this embodiment, four stirring rods 4 are provided in each pitch of the scraper 5, and the four stirring rods 4 are arranged at equal intervals along the circumferential direction of the stirring shaft 3; the feed port 6 is provided at the front end top of the horizontal container 1; the discharge port 7 is provided at the rear end bottom of the horizontal container 1; the exhaust port 8 is provided at the rear end top of the horizontal container 1. During operation, the material (i.e., high-salt wastewater) is put in from the feed port 6, and a high-temperature medium is introduced into the jacket 9 to heat the material; the motor 2 drives the stirring shaft 3 to rotate, driving the stirring rod 4 to continuously stir the material to make the temperature of the material uniform; as the temperature of the material gradually increases, the precipitated salt crystals adhere to the inner wall of the container 1. At this time, the scraper 5 rotates under the drive of the stirring shaft 3 and scrapes off the salt crystals on the inner wall of the container 1, so that the inner wall of the container 1 is always kept clean during the evaporation process, avoiding the deterioration of the heat transfer effect due to scaling, shortening the evaporation reaction time, and saving the cost of using high-temperature medium; in addition, the scraper 5 is a spiral structure, and while scraping off the salt crystals on the inner wall of the container 1, the scraper 5 can push the salt crystals to the side of the discharge port 7 for easy discharge.

[0026] It should be noted that during the evaporation reaction, the material temperature is maintained at a low temperature between 60-95°C to prevent the difficult-to-degrade organic matter in the wastewater from being evaporated and vaporized. This is also the optimal temperature for most salt crystallization.

[0027] Exemplarily, in order to make the steam meet the emission standards, the exhaust port 8 is connected to a condenser 13 that condenses the steam into water. However, during the evaporation reaction, after the high-salt wastewater is vaporized, the water vapor will carry a large amount of non-condensable gas, oily matter and splashing waste liquid into the condenser 13 pipeline, resulting in excessive impurities inside the pipeline, affecting the emission standards. Therefore, a demister 14 is added between the exhaust port 8 and the condenser 13, and the upper part of the demister 14 is filled with fillers, which are used to intercept non-condensable gas, oily matter and splashing waste liquid, etc., to keep the condenser 13 pipeline clean, so that the water quality is not polluted by impurities and meets the emission standards.

[0028] Exemplarily, the condensate outlet of the condenser 13 is connected to a liquid storage tank 15 to collect and reuse the condensate. In this embodiment, a valve 16 and a water pump 17 are provided between the condensate outlet of the condenser 13 and the liquid storage tank 15 .

[0029] Exemplarily, the material of the scraper 5 is preferably silicone or rubber, which can prevent the scraper head from being too hard to scratch the inner wall of the container 1, and at the same time avoid corrosion of the scraper 5 caused by high-salt wastewater, and is durable and reliable.

[0030] Exemplarily, the material of the connecting skeleton 12 is preferably titanium, which has the characteristics of light weight, high strength and good corrosion resistance.

[0031] In the description of the present invention, it should be understood that, unless otherwise clearly specified and limited, the terms "installation", "connection" and "connection" used in the present invention should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0032] The above disclosure is only a preferred embodiment of the present invention, and certainly cannot be used to limit the scope of rights of the present invention. Therefore, equivalent changes made according to the scope of the patent application of the present invention are still within the scope covered by the present invention.

Claims

1. A low-temperature evaporation treatment device for high-salinity wastewater, characterized in that: The invention comprises a horizontal container, a motor, a stirring shaft, a stirring rod and a scraper; the horizontal container is provided with a feed port, a discharge port and an exhaust port, the feed port is arranged at the front end of the horizontal container, and the discharge port and the exhaust port are both arranged at the rear end of the horizontal container; a jacket is coaxially sleeved on the outer circumference of the horizontal container, and the jacket is provided with a medium inlet and a medium outlet for high-temperature medium to enter and exit; the stirring shaft is rotatably connected to the horizontal container and is coaxially arranged with the horizontal container; one end of the stirring shaft passes through the end face of the horizontal container and is connected to the power output end of the motor; the scraper is fixed to the stirring shaft through a connecting skeleton and is spirally arranged along the axial direction of the stirring shaft, the scraper contacts the inner wall of the horizontal container, and the scraper can push the solid material to move to the side of the discharge port when the stirring shaft rotates at any time; at least one stirring rod is arranged in each pitch of the scraper, the stirring rod extends radially from the stirring shaft, and a gap is left between the stirring rod and the inner wall of the horizontal container.

2. The low-temperature evaporation treatment device for high-salinity wastewater according to claim 1, characterized in that: Four stirring rods are arranged in each pitch of the scraper, and the four stirring rods are arranged at equal intervals along the circumferential direction of the stirring shaft.

3. The low-temperature evaporation treatment device for high-salinity wastewater according to claim 1, characterized in that: The exhaust port is connected to a condenser for condensing steam into water.

4. The low-temperature evaporation treatment device for high-salinity wastewater according to claim 3, characterized in that: A demister is provided between the exhaust port and the condenser.

5. The low-temperature evaporation treatment device for high-salinity wastewater according to claim 3, characterized in that: The condensed water outlet of the condenser is connected with a liquid storage tank.

6. The low-temperature evaporation treatment device for high-salinity wastewater according to claim 5, characterized in that: A valve and a water pump are provided between the condensed water outlet of the condenser and the liquid storage tank.

7. The low-temperature evaporation treatment device for high-salinity wastewater according to claim 1, characterized in that: The feed port is arranged at the front end top of the horizontal container; the discharge port is arranged at the rear end bottom of the horizontal container; and the exhaust port is arranged at the rear end top of the horizontal container.

8. The low-temperature evaporation treatment device for high-salinity wastewater according to claim 1, characterized in that: The scraper is made of silicone or rubber.

9. The low-temperature evaporation treatment device for high-salinity wastewater according to claim 1, characterized in that: The material of the connecting frame is titanium.

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