Supergravity wastewater evaporation and concentration device
By mixing and spraying dry air with wastewater, and using gravity difference to separate water, combined with a supergravity wastewater evaporation and concentration device, the problems of long time consumption and heat energy waste in the existing technology are solved, and efficient and low-consumption wastewater concentration and resource recovery are achieved.
Patent Information
- Application Number
- CN202422909705.7
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-11-27
- Publication Date
- 2025-10-28
- Estimated Expiration
- 2034-11-27
AI Technical Summary
Existing methods for evaporating and concentrating pickling wastewater are time-consuming and waste a lot of heat energy, resulting in high costs and failing to meet the requirements for efficient and low-consumption concentration.
The dry air concentration method is adopted, which uses gravity difference to separate water and ferrous sulfate. The wastewater is treated by a supergravity wastewater evaporation and concentration device, including a concentration tower, an air dryer, an air buffer tank and a condenser, using atomizing nozzles and a Venturi pipe mixer.
It achieves efficient and low-consumption concentration of wastewater, reduces equipment requirements, lowers operating costs, and recovers ferrous sulfate crystals and acid, generating economic value and avoiding environmental pollution.
Smart Images
Figure CN223480836U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of water treatment technology, and in particular to a supergravity wastewater evaporation and concentration device. Background Art
[0002] Pickling is widely used in the steel and electroplating industries, serving as a crucial step in cleaning metal surfaces and improving the surface structure of steel. The resulting ferrous sulfate wastewater is commonly treated domestically using either roasting or neutralization methods. However, the roasting method is too complex, requires enormous upfront investment, and suffers from high operating and maintenance costs, severe equipment damage, and a long payback period, making it unaffordable for most small and medium-sized enterprises. Neutralization, on the other hand, requires large quantities of alkaline raw materials and involves the treatment of substantial amounts of useless waste residue, also presenting problems of high cost and complex processes.
[0003] Therefore, the evaporation-concentration-cooling crystallization method, as an efficient resource-based treatment method for pickling wastewater, has gradually become the mainstream process for the above-mentioned wastewater treatment. By utilizing the evaporation-concentration and cooling crystallization processes, not only can the wastewater be treated efficiently, but also the ferrous sulfate crystals and acid solution can be recovered, thereby achieving cost recovery and generating economic value.
[0004] Currently, the evaporation and concentration methods for wastewater generally involve heating and evaporating to concentrate the water in the wastewater. This method is time-consuming and wastes a lot of heat energy, resulting in excessively high evaporation and concentration costs. At the same time, it requires high-end equipment and cannot meet the requirements for efficient and low-consumption wastewater concentration. Summary of the Invention
[0005] The purpose of this invention is to overcome the shortcomings of the above-mentioned technologies and provide a supergravity wastewater evaporation and concentration device. This device uses dry air to concentrate wastewater and utilizes gravity difference to separate water from ferrous sulfate, achieving a high-efficiency and low-consumption concentration effect.
[0006] The technical solution adopted in this utility model is as follows:
[0007] A high-gravity wastewater evaporation and concentration device, characterized in that it includes a concentration tower, an air dryer, an air buffer tank, and a condenser. The concentration tower includes a tower body, with an air outlet at the top, a liquid outlet at the bottom, and a water inlet on the side wall. An atomizing nozzle is installed inside the tower body and fixed to the upper part of the tower body by a bracket. A circulating liquid inlet is located on one side of the bottom of the tower body. The circulating liquid inlet is sequentially connected to the atomizing nozzle via a liquid pump and a Venturi mixer. The liquid inlet of the Venturi mixer is connected to the liquid pump via a pipe. The gas-liquid outlet of the Venturi mixer is connected to the atomizing nozzle via a pipe. The gas inlet of the Venturi mixer is connected to the air buffer tank via a pipe. The air buffer tank is connected to the air dryer via a pipe. The air outlet of the concentration tower is connected to the condenser via a pipe.
[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 the downward spraying method, the air carrying moisture can be separated from the ferrous sulfate droplets. If the nozzle is set upward, some ferrous sulfate droplets will easily be discharged from the air outlet along with the air.
[0009] A further improvement of this utility model is that the atomizing nozzle is positioned higher than the water inlet.
[0010] A further improvement of this invention is that a liquid level monitor is installed inside the tower, which can determine the concentration of wastewater by measuring the liquid level.
[0011] A further improvement of this invention is that an air heater is provided between the air buffer tank and the Venturi pipe mixer, which can heat the dry air as needed, thus improving the evaporation and concentration efficiency of wastewater.
[0012] A further improvement of this utility model is that the air dryer is an adsorption-type air dryer, in which outside air is adsorbed and dried to ensure subsequent concentration efficiency. In addition, the air dryer can be connected to the outlet of the condenser. After the condenser condenses and removes most of the moisture from the humid gas, the remaining humid gas can be dried by the air dryer and then recycled.
[0013] The beneficial effects of the utility model are:
[0014] 1. This utility model utilizes the method of mixing and spraying dry air and wastewater to attach the water in the wastewater to the dry air. Through the gravity difference, the upward airflow discharges some of the water, thereby achieving the evaporation and concentration of wastewater.
[0015] 2. This utility model can ensure the dry air required for wastewater by setting up an air dryer. By setting up an air buffer tank, dry air can be pre-stored to prevent insufficient dry air from affecting the evaporation and concentration efficiency of wastewater. At the same time, when the air dryer provides excessive dry air, the air buffer tank can collect the excess dry air for the next use, avoiding resource waste.
[0016] 3. This utility model uses a condenser to condense humid air. Since the air discharged from the tower contains a large amount of water and may contain some acidic components, direct discharge would pollute the environment. The condenser can be used to recover the evaporated water and prevent secondary pollution. Attached Figure Description
[0017] Figure 1 This is a schematic diagram of the structure of this utility model.
[0018] In the diagram: 1. Concentrator; 2. Air dryer; 3. Air buffer tank; 4. Condenser; 5. Tower body; 6. Air outlet; 7. Liquid drain; 8. Water inlet; 9. Atomizing nozzle; 10. Support; 11. Circulating liquid inlet; 12. Liquid pump; 13. Venturi pipe mixer; 14. Liquid level monitor; 15. Air heater. DETAILED DESCRIPTION
[0019] The technical solution of this utility model will be further described in detail below through specific embodiments and with reference to the accompanying drawings:
[0020] like Figure 1 As shown, a high-gravity wastewater evaporation and concentration device includes a concentration tower 1, an air dryer 2, an air buffer tank 3, and a condenser 4. The concentration tower 1 includes a tower body 5, with an air outlet 6 at the top and a liquid outlet 7 at the bottom. A water inlet 8 is provided on the side wall of the tower body 5. An atomizing nozzle 9 is installed inside the tower body 5 and is fixed to the upper part of the tower body 5 by a bracket 10. A circulating liquid inlet 11 is provided on one side of the bottom of the tower body 5. The circulating liquid inlet 11 is connected to the atomizing nozzle 9 sequentially through a liquid pump 12 and a Venturi pipe mixer 13. The liquid inlet of the Venturi pipe mixer 13 is connected to the liquid pump 12 through a pipe. The gas-liquid outlet of the Venturi pipe mixer 13 is connected to the atomizing nozzle 9 through a pipe. The gas inlet of the Venturi pipe mixer 13 is connected to the air buffer tank 3 through a pipe. The air buffer tank 3 is connected to the air dryer 2 through a pipe. The air outlet 6 of the concentration tower 1 is connected to the condenser 4 through a pipe.
[0021] In this embodiment, several atomizing nozzles 9 are provided, and the nozzles are vertically downward. By using a downward spraying method, the air carrying moisture and ferrous sulfate droplets can be separated. If the nozzles are set upward, some ferrous sulfate droplets will easily be discharged from the air outlet 6 along with the air.
[0022] In this embodiment, the atomizing nozzle 9 is positioned higher than the water inlet 8.
[0023] In this embodiment, a liquid level monitor 14 is installed inside the tower body 5, which can determine the concentration of wastewater by measuring the liquid level.
[0024] In this embodiment, an air heater 15 is also provided between the air buffer tank 3 and the Venturi pipe mixer 13, which can heat the dry air as needed, thus improving the evaporation and concentration efficiency of wastewater.
[0025] In this embodiment, the air dryer 2 is an adsorption type air dryer. Outside air is adsorbed and dried by the air dryer 2 to ensure the subsequent concentration efficiency. In addition, the air dryer 2 can be connected to the air outlet 6 of the condenser 4. After the condenser 4 condenses and removes most of the moisture in the humid gas, the remaining humid gas is dried by the air dryer 2 and can be recycled.
[0026] 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 supergravity wastewater evaporation and concentration device, characterized in that, The system includes a concentration tower, an air dryer, an air buffer tank, and a condenser. The concentration tower includes a tower body with an air outlet at the top, a liquid outlet at the bottom, and a water inlet on the side wall. An atomizing nozzle is installed inside the tower body and fixed to the upper part of the tower body by a bracket. A circulating liquid inlet is located on one side of the bottom of the tower body. The circulating liquid inlet is sequentially connected to the atomizing nozzle via a liquid pump and a Venturi mixer. The liquid inlet of the Venturi mixer is connected to the liquid pump via a pipe. The gas-liquid outlet of the Venturi mixer is connected to the atomizing nozzle via a pipe. The gas inlet of the Venturi mixer is connected to the air buffer tank via a pipe. The air buffer tank is connected to the air dryer via a pipe. The air outlet of the concentration tower is connected to the condenser via a pipe.
2. The ultragravity wastewater evaporation and concentration device according to claim 1, characterized in that, The atomizing nozzles are provided in several parts, and the nozzles are vertically downward.
3. The centrifugal wastewater evaporation and concentration device according to claim 1, characterized in that, The atomizing nozzle is positioned above the water inlet.
4. The ultragravity wastewater evaporation and concentration device according to claim 1, characterized in that, A liquid level monitor is installed inside the tower.
5. The ultragravity wastewater evaporation and concentration device according to claim 1, characterized in that, An air heater is also provided between the air buffer tank and the Venturi pipe mixer.
6. The centrifugal wastewater evaporation and concentration device according to claim 1, characterized in that, The air dryer is an adsorption type air dryer.