Continuous wastewater concentration treatment device

Abstract

The utility model discloses a continuous wastewater concentration treatment device, which relates to the technical field of water treatment and comprises a plurality of concentration towers connected in series, atomizing nozzles are arranged at the upper parts in tower bodies of the concentration towers, and circulating liquid ports at one sides of the bottoms of the concentration towers are connected with the atomizing nozzles through liquid pumps and Venturi pipeline mixers in sequence; a gas outlet in the top of each concentration tower is connected with a condenser; a gas flow outlet of the condenser is sequentially connected with gas inlets of an air filter, a dry air buffer tank and a Venturi pipeline mixer; a wastewater inlet is formed in the side wall of the upper part of the tower body of the first concentration tower, the tower bodies of two adjacent concentration towers are connected through an overflow pipe, and the overflow pipe is horizontally arranged and is lower than the wastewater inlet. According to the utility model, the waste liquid can be continuously concentrated, the waste water is evaporated and concentrated by adopting a dry air and waste water mixed spraying mode, the energy consumption is low, the cost is low, and the concentration efficiency is high.

Description

Technical Field

[0001] This utility model relates to the field of water treatment technology, and in particular to a continuous wastewater concentration treatment device. Background Technology

[0002] Pickling is an indispensable process in cold rolling mills. During the production process, cold-rolled steel needs to be pickled to remove iron oxide scale from its surface. After pickling, the steel surface needs to be rinsed with pure water to remove any residual acid, thus generating pickling wastewater. This wastewater can easily pollute the environment and must be treated to meet discharge standards. Due to the large volume of wastewater, the large scale of wastewater treatment equipment and facilities, and the high treatment costs, the evaporation concentration-cooling crystallization method is the best treatment method for this type of wastewater.

[0003] Currently, the commonly used method for wastewater concentration at home and abroad is to heat and evaporate the wastewater with steam. However, this method is difficult to select, consumes a lot of steam, and has high concentration costs. It is no longer suitable for efficient wastewater concentration treatment. At the same time, the existing equipment cannot meet the requirements of continuous evaporation and concentration treatment and needs further improvement. Summary of the Invention

[0004] The purpose of this invention is to overcome the shortcomings of the above-mentioned technology and provide a continuous wastewater concentration treatment device that can achieve uninterrupted and continuous concentration of waste liquid. At the same time, it adopts a method of mixing dry air with wastewater for spraying to achieve evaporation and concentration of wastewater. It has low energy consumption, low cost and high concentration efficiency.

[0005] To achieve the above-mentioned objectives, the technical solution adopted by this utility model is as follows:

[0006] A continuous wastewater concentration treatment device, characterized in that it comprises several concentration towers connected in series, each concentration tower including a tower body, a gas outlet at the top of the tower body, a liquid outlet at the bottom of the tower body, a circulating liquid outlet on one side of the bottom of the tower body, a Venturi pipe mixer installed on the outer wall of the tower body, an atomizing nozzle installed at the upper part of the tower body, the atomizing nozzle being fixed in the tower body by a bracket, the circulating liquid outlet being connected to the liquid inlet of the Venturi pipe mixer via a liquid pump, the gas-liquid outlet of the Venturi pipe mixer being connected to the atomizing nozzle via a pipe, the gas inlet of each Venturi pipe mixer being connected to a dry air buffer tank via a pipe, the gas outlet at the top of each tower body being connected to a condenser via a pipe, the gas outlet of the condenser being connected to an air filter via a pipe, and the air filter being connected to the dry air buffer tank via a pipe; a wastewater inlet is provided on the upper side wall of the first concentration tower body, and the tower bodies of adjacent concentration towers are connected by an overflow pipe, the overflow pipe being arranged horizontally and positioned below the wastewater inlet.

[0007] A further improvement of this invention is that the concentration tower is provided with at least two towers.

[0008] A further improvement of this utility model is that the atomizing nozzle is provided in several parts, and the nozzle is vertically downward. By adopting a downward spraying method, the air carrying moisture can be separated from the ferrous sulfate droplets, preventing the ferrous sulfate droplets from being discharged from the air outlet when spraying upward.

[0009] A further improvement of this invention is that the atomizing nozzle is positioned above the wastewater inlet.

[0010] A further improvement of this invention is that a liquid level monitor is installed inside the tower, which can monitor the wastewater concentration in the concentration tower in real time.

[0011] A further improvement of this invention is that an air heater is provided between the dry air buffer tank and the Venturi pipe mixer, which can heat the dry air and improve the evaporation and concentration efficiency of wastewater.

[0012] A further improvement of this utility model is that at least two condensers are provided, and the condensers are connected in series. The condensation and drying of humid air can be achieved through multiple condensers, and the moisture can be converted into pure dry air by using an air filter, so as to achieve recycling.

[0013] The beneficial effects of this utility model are as follows:

[0014] This invention utilizes multiple concentration towers to continuously evaporate and concentrate wastewater, effectively improving concentration efficiency. The concentrated wastewater is discharged through a drain port to a cooling and crystallization device for cooling and crystallization. By mixing and spraying dry air with wastewater, the water is allowed to adhere to the air and be discharged, thus concentrating the wastewater. A condenser is installed to not only recover the concentrated water and prevent environmental pollution but also to dry and reuse the airflow. The dry air buffer tank in this invention ensures the rational use of dry air; it can pre-store and replenish dry air when needed and collect excess dry air to prevent resource waste. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the structure of this utility model.

[0016] In the diagram: 1. Concentration tower; 2. Tower body; 3. Air outlet; 4. Liquid outlet; 5. Circulating liquid outlet; 6. Venturi pipe mixer; 7. Atomizing nozzle; 8. Support; 9. Liquid pump; 10. Dry air buffer tank; 11. Condenser; 12. Air filter; 13. Wastewater inlet; 14. Overflow pipe; 15. Liquid level monitor; 16. Air heater. Detailed Implementation

[0017] The technical solution of this utility model will be further described in detail below through specific embodiments and with reference to the accompanying drawings:

[0018] like Figure 1 As shown, a continuous wastewater concentration treatment device includes several concentration towers 1 connected in series. Each concentration tower 1 includes a tower body 2. The top of the tower body 2 has a gas outlet 3, the bottom of the tower body 2 has a liquid outlet 4, and one side of the bottom of the tower body 2 has a circulating liquid inlet 5. A Venturi mixer 6 is installed on the outer wall of the tower body 2. An atomizing nozzle 7 is installed inside the upper part of the tower body 2 and is fixed inside the tower body 2 by a bracket 8. The circulating liquid inlet 5 is connected to the liquid inlet of the Venturi mixer 6 via a liquid pump 9. The gas-liquid outlet of the Venturi mixer 6 is connected to the atomizing nozzle 7 via a pipeline. In the first 7, the gas inlet of each Venturi pipe mixer 6 is connected to the dry air buffer tank 10 through a pipe, and the gas outlet 3 at the top of each tower body 2 is connected to the condenser 11 through a pipe. The air outlet of the condenser 11 is connected to the air filter 12 through a pipe, and the air filter 12 is connected to the dry air buffer tank 10 through a pipe. A wastewater inlet 13 is provided on the upper side wall of the tower body 2 of the first concentration tower 1. The tower bodies 2 of two adjacent concentration towers 1 are connected by an overflow pipe 14. The overflow pipe 14 is arranged horizontally and is set lower than the wastewater inlet 13.

[0019] In this embodiment, two concentration towers 1 are provided.

[0020] In this embodiment, there are several atomizing nozzles 7, specifically four, and the nozzles are vertically downward. By using a downward spraying method, the air carrying moisture can be separated from the ferrous sulfate droplets, preventing the ferrous sulfate droplets from being discharged from the air outlet 3 when spraying upward.

[0021] In this embodiment, the atomizing nozzle 7 is positioned higher than the wastewater inlet 13.

[0022] In this embodiment, a liquid level monitor 15 is installed inside the tower body 2, which can monitor the wastewater concentration in the concentration tower 1 in real time.

[0023] In this embodiment, an air heater 16 is also provided between the dry air buffer tank 10 and the Venturi pipe mixer 6, which can heat the dry air and improve the evaporation and concentration efficiency of wastewater.

[0024] In this embodiment, two condensers 11 are provided, and each condenser 11 is connected in series. The condensation and drying of humid air can be achieved through multiple condensers 11, and the air filter 12 is used to convert the moisture into pure dry air for recycling.

[0025] Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention. Those skilled in the art can make changes, modifications, substitutions and variations to the above embodiments within the scope of the present invention without departing from the principles and spirit of the present invention. Any simple modifications, equivalent changes and modifications made to the above embodiments based on the technical essence of the present invention shall still fall within the scope of the technical solution of the present invention.

Claims

1. A continuous wastewater concentration treatment device, characterized in that, The system comprises several concentration towers connected in series. Each concentration tower includes a tower body with an outlet at the top and a drain outlet at the bottom. A circulating liquid inlet is located on one side of the bottom of the tower body. A Venturi pipe mixer is installed on the outer wall of the tower body, and an atomizing nozzle is installed at the top of the tower body. The atomizing nozzle is fixed to the tower body by a bracket. The circulating liquid inlet is connected to the liquid inlet of the Venturi pipe mixer via a liquid pump. The gas-liquid outlet of the Venturi pipe mixer is connected to the atomizing nozzle via a pipe. The gas inlet of each Venturi pipe mixer is connected to a dry air buffer tank via a pipe. The outlet at the top of each tower body is connected to a condenser via a pipe. The gas outlet of the condenser is connected to an air filter via a pipe. The air filter is connected to the dry air buffer tank via a pipe. A wastewater inlet is provided on the upper side wall of the first concentration tower. Adjacent concentration towers are connected by an overflow pipe, which is horizontally arranged and positioned below the wastewater inlet.

2. The continuous wastewater concentration treatment device according to claim 1, characterized in that, The concentration tower is provided in at least two.

3. The continuous wastewater concentration treatment device according to claim 1, characterized in that, The atomizing nozzles are provided in several parts, and the nozzles are vertically downward.

4. The continuous wastewater concentration treatment device according to claim 1, characterized in that, The atomizing nozzle is positioned above the wastewater inlet.

5. The continuous wastewater concentration treatment device according to claim 1, characterized in that, A liquid level monitor is installed inside the tower.

6. The continuous wastewater concentration treatment device according to claim 1, characterized in that, An air heater is also provided between the dry air buffer tank and the Venturi pipe mixer.

7. The continuous wastewater concentration treatment device according to claim 1, characterized in that, The condenser is provided in at least two parts, and the condensers are connected in series.

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