Desalting device and process through high-voltage capacitor adsorption

A high-voltage capacitor and process technology, which is applied in the field of high-voltage capacitor adsorption and desalination devices, can solve problems such as easy electrolysis of the solution, high requirements for electrode materials, and complex device structures, and achieve corrosion prevention, low requirements for electrode materials, and simple structure and devices Effect

Active Publication Date: 2013-08-21
NANJING UNIV OF TECH
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] The purpose of the present invention is to overcome the shortcomings of the existing capacitive adsorption method, such as the direct contact between the electrode and the solution, the solution is prone to electrolysis when the applied voltage is higher than 1.6V, the requirements for the electrode material are high, the life of the electrode is short, and the device structure is complicated. A High Voltage Capacitive Adsorption Desalination Device

Method used

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Examples

Experimental program
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Embodiment 1

[0023] Such as figure 1 Shown: plexiglass is used as the material of the side wall and each plate, the whole device is a cuboid structure, and the reaction chamber is in accordance with the first side wall 10A, the first detachable plate 7A, the movable plate 8, the second detachable plate 7B and the first detachable plate After the two side walls 10B are arranged in sequence, the long iron rod 5 with threads passes through the small holes 13 provided in the corresponding positions to connect (such as figure 2 ); between the first side wall 10A and the first detachable plate 7A, between the second detachable plate 7B and the second side wall 10B, an anion membrane 12 and a cation membrane 4 are respectively embedded, and both ends are fixed with supporting nuts 6 , the size of the anion and cation membrane matches the reaction chamber, and the flow channel is formed between the anion membrane 12 and the cation membrane 4; the inside of the reaction chamber is close to the rel...

Embodiment 2

[0025]The structure of the device is as in Example 1, wherein the electrode plate is made of graphite electrode, and the electrode plate with a size of 55 mm × 80 mm is selected according to the size of the reaction chamber. The thickness of the electrode plate is 2 mm, and the distance between the electrode plates is 20 mm. The thickness is 0.5mm, the membrane pore diameter is 4μm, the gap between the anion membrane and the anode plate, and between the cation membrane and the cathode plate is 2mm, the water inlet and water outlet aperture is 5mm, and the small hole diameter is 3mm, and the conductivity meter is used to measure the salt The conductivity of the solution, using the conductivity value to characterize the concentration of the solution, prepare a 500mg / L NaCl solution as a simulated saline wastewater, add it to the reaction chamber, close the water inlet and outlet, adjust the voltage to 60V, carry out static adsorption reaction, and measure the conductivity of the r...

Embodiment 3

[0027] The structure is as in Example 1. The electrode plate is made of stainless steel electrode. The size of the electrode plate is 80mm×100mm. The thickness of the electrode is 5mm. 6μm, the gap between the anion membrane and the anode plate, and between the cation membrane and the cathode plate is 5mm, the aperture of the water inlet and outlet is 5mm, and the aperture of the small hole is 3mm. Use a conductivity meter to measure the conductivity of the salt solution. Use the conductivity value To characterize the solution concentration, the temperature is 25°C and the concentration is 80mg / LCaCl 2 The solution (conductivity value is about 200μS / cm) is used as the influent water, which is sent into the reaction chamber by the peristaltic pump. The flow rate of the solution is adjusted to 72m / s, and the voltage is 20V. The conductivity value of the effluent water is measured every 15min. The lowest, stop the water inlet for backwashing after 1 hour of reaction, and proceed ...

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Abstract

The invention relates to a desalting device and process through a high-voltage capacitor adsorption method. The device comprises a reaction chamber and an external power source, wherein the reaction chamber is formed by a first side wall, a first detachable plate, a movable plate, a second detachable plate and a second side wall which are sequentially arranged, connected and fixed through iron rods with threads; an anode plate and a cathode plate are respectively arranged at opposite positions, close to the first and the second side walls, in the reaction chamber; metal screws are respectively arranged at middle positions of tops of the anode plate and the cathode plate and respectively connected with the anode and the cathode of the external power source; an anionic membrane and a cationic membrane are respectively arranged at opposite positions inside the anode plate and the cathode plate; a flow channel is formed between the anionic membrane and the cationic membrane; the movable plate is provided with a water inlet and a water outlet; and insulating treatment is carried out on surfaces of the electrodes. According to the process, salt-containing wastewater is put into a reactor; the electrodes at two ends are connected to the external direct-current power source; and the effluent water flows out via the water outlet on the top. According to the invention, insulated electrodes are adopted to replace traditional electrodes, so that the method can be implemented at high voltage.

Description

technical field [0001] The invention relates to a high-voltage capacitive adsorption desalination device and a process, belonging to the technical field of special equipment for treating salt water. Background technique [0002] With the acceleration of my country's modernization process, the output of saline wastewater has increased year by year, and the sources have become more extensive. Such as printing and dyeing, pesticides, chemical production, oil and gas exploration, food processing and other industries. These saline wastewater often contain high concentrations of organic matter. If biological methods are used directly for treatment, the salts will enter the biochemical process, inhibit microorganisms, affect the effect of biochemical treatment, and make it difficult for the effluent to meet the discharge standards. [0003] At present, methods such as dilution with water, distillation, electrosorption, ion exchange, ultrafiltration and reverse osmosis are commonly...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F1/469
Inventor 赵贤广徐炎华齐菲
Owner NANJING UNIV OF TECH
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