Laboratory organic wastewater treatment device based on glow discharge

Abstract

A laboratory organic wastewater treatment device based on glow discharge is characterized in that a reaction tank is arranged on a magnetic stirrer, an anode bar, a spraying mechanism, a sewage inlet and an exhaust structure are arranged at the top of the reaction tank, the anode bar is located in the center of the top of the reaction tank, a support is arranged on the lower middle portion in the reaction tank, and a cathode plate is arranged on the support; the cathode plate is located under the anode bar and forms a glow discharge plasma system with the anode bar, iron powder is placed in the reaction tank, an electromagnetic adsorption mechanism used for fixing the iron powder is arranged on the outer side wall of the reaction tank, and a water outlet is formed in the bottom of the reaction tank. According to the device disclosed by the utility model, refractory organic pollutants in water can be efficiently degraded by adopting a glow discharge plasma technology, the refractory organic pollutants are converted into micromolecular, low-toxicity or non-toxic substances, and compared with a physical method and a chemical method, the glow discharge plasma technology almost does not need consumables, so that the treatment cost is reduced.

Description

TECHNICAL FIELD

[0001] The utility model belongs to the technical field of organic wastewater treatment, and specifically relates to an organic wastewater treatment device based on glow discharge laboratory. BACKGROUND

[0002] Although China is rich in total water resources, the per capita share is small, and the temporal and spatial distribution is uneven. With the rapid development of social economy and technology, a large amount of industrial wastewater, urban domestic sewage, rural sewage, pesticides, antibiotics, dyes, personal care products and other emerging pollutants enter the water body, resulting in serious ecological environmental pollution, reduced available water resources and aggravated human health risks.

[0003] Dye wastewater, as a kind of industry-recognized refractory industrial wastewater, has complex composition, deep color, strong toxicity, low biodegradability, large pH fluctuation, and some toxic components such as heavy metal salts can exist stably in the environment for a long time, posing a threat to the ecological system and human health. The composition of landfill leachate is complex, the concentration of pollutants is high, the proportion of microbial nutrients is unbalanced, and the biodegradability is poor. The water quality and quantity fluctuate greatly in different periods. The leachate itself has volatile components, and small-molecule organics are also produced during the experiment of other organic solutions, which can easily endanger the health of experimental personnel.

[0004] Conventional organic wastewater treatment methods mainly include physical method, chemical method and biological method. Among them, the physical method reagent material is expensive and has high cost. The chemical method needs to use a large amount of reagents, which will produce more difficult-to-treat sludge. The biological method has a long treatment period, and the growth of activated sludge is greatly affected by water quality fluctuations, and the treatment efficiency is limited.

[0005] The glow discharge plasma technology can generate various strong oxidizing free radicals such as hydroxyl radicals, sulfate radicals and chlorine radicals in situ, which can oxidize most of the refractory organic pollutants in water into small-molecule low-toxicity / non-toxic substances. Plasma can be generated in ordinary air or liquid itself, almost without the need for consumables, and has high degradation efficiency and low energy consumption.

[0006] Chinese patent application No. 202321120861.4, entitled "Device for treating dye wastewater by gas multi-stage introduction and glow discharge plasma", realizes the functions of promoting liquid flow and uniform reaction liquid by gas spraying in the aeration disc, but the range of action is small, the additional cost is high, the cover plate needs to be disassembled every time the liquid flows in and out, the operation is complex and cumbersome, and the particle electrode is mixed in the sewage, which is difficult to separate and take out after the sewage treatment is completed. Therefore, the device is not suitable for laboratory use. SUMMARY

[0007] The utility model wants to overcome the prior art's defects, provide a design is reasonable, simple structure, processing efficiency high's based on glow discharge laboratory organic wastewater treatment device.

[0008] The technical scheme adopted to solve the above technical problems is: a glow discharge laboratory organic wastewater treatment device, a reaction tank is arranged on the magnetic stirrer, an anode rod, a spraying mechanism, a sewage inlet and an exhaust structure are arranged on the top of the reaction tank, the anode rod is located at the center of the top of the reaction tank, a support is arranged in the middle and lower part of the reaction tank, a cathode plate is arranged on the support, the cathode plate is located directly below the anode rod and forms a glow discharge plasma system with the anode rod, iron powder is placed in the reaction tank, an electromagnetic adsorption mechanism for fixing the iron powder is arranged on the outer wall of the reaction tank, and a drain is arranged at the bottom of the reaction tank.

[0009] As a preferred technical scheme, the spraying mechanism is that a water inlet pipe and three nozzles distributed at an angle of 120 degrees are arranged on the water distribution ring, the water inlet pipe extends out of the top of the reaction tank, the water distribution ring is located at the center of the top of the reaction tank, and the anode rod penetrates through the water distribution ring.

[0010] As a preferred technical scheme, the electromagnetic adsorption mechanism comprises two symmetrically arranged electromagnetic adsorbers, an arc-shaped magnetic guide plate is arranged on the front side of the mounting seat of the electromagnetic adsorber, and an electromagnet is arranged in the mounting seat.

[0011] As a preferred technical scheme, the reaction tank body is a glass tank body.

[0012] As a preferred technical scheme, a colorimeter is arranged on the outer wall of the reaction tank.

[0013] As a preferred technical scheme, the exhaust structure is that the deodorization box is connected with the reaction tank through a pipeline, activated carbon is arranged in the deodorization box, and an exhaust hole is arranged at the top of the deodorization box.

[0014] As a preferred technical scheme, the anode rod is a platinum rod or a stainless steel rod.

[0015] As a preferred technical scheme, the cathode plate is a graphite plate.

[0016] As a preferred technical scheme, an electronic liquid level meter is arranged in the reaction tank.

[0017] The utility model has the advantages of the following:

[0018] The glow discharge plasma technology can efficiently degrade the refractory organic pollutants in water and convert them into small molecules, low-toxic or non-toxic substances, and compared with physical and chemical methods, the glow discharge plasma technology almost does not need consumables, thereby reducing the processing cost.

[0019] The utility model discloses a iron powder is used as catalyst, enhances the efficiency of oxidation reaction, promotes the decomposition of organic pollutant, simultaneously, the rotating magnetic field of magnetic stirrer can make the eddy current of iron powder in organic sewage, improved wastewater treatment efficiency.

[0020] The utility model discloses a electromagnetic attraction mechanism to the fixation of electromagnet, adopt the spray mechanism to flush iron powder, realized the reuse of iron powder. BRIEF DESCRIPTION OF DRAWINGS

[0021] Figure 1 It is the structure schematic diagram of the utility model.

[0022] Figure 2 It is Figure 1 A-A section view of.

[0023] Among them: magnetic stirrer 1, electromagnetic adsorber 2, electromagnet 2-1, mounting seat 2-2, arc magnetic conducting plate 2-3, colorimeter 3, reaction tank 4, sewage inlet 5, spray mechanism 6, anode rod 7, exhaust structure 8, electronic liquid level meter 9, support 10, cathode plate 11, iron powder 12, drain 13. DETAILED DESCRIPTION

[0024] The utility model is further explained in detail below in combination with the drawings and examples, but the utility model is not limited to the following implementation.

[0025] In Figure 1 、 2 Among them, the based on glow discharge laboratory organic wastewater treatment device of the embodiment installs reaction tank 4 on magnetic stirrer 1, and the reaction tank 4 jar body is glass jar body, and the top of reaction tank 4 is installed anode rod 7, spray mechanism 6, sewage inlet 5, exhaust structure 8, electronic liquid level meter 9, and spray mechanism 6 includes water distribution ring, sprayer, inlet pipe, and is fixedly installed inlet pipe and three sprayers that are distributed 120 degrees on the water distribution ring in the top center of reaction tank 4, and the inlet pipe is stretched out the top outside of reaction tank 4, is used to be connected with water source, and spray mechanism 6 is used to clean inside reaction tank 4, and anode rod 7 is located in the top center of reaction tank 4 and passes through the center of water distribution ring, and anode rod 7 is platinum rod, and also can be stainless steel rod, and the inside lower part of reaction tank 4 is fixedly installed with support 10, and support 10 is provided with cathode plate 11, and the periphery of cathode plate 11 is graphite plate, and cathode plate 11 is located below anode rod 7 and constitutes glow discharge plasma system with anode rod 7, and reaction tank 4 is placed with iron powder 12, and the lateral wall of reaction tank 4 is provided with colorimeter 3 and electromagnetic adsorption mechanism for fixing iron powder 12, and colorimeter 3 is the product sold in market, is used to monitor the colority of sewage inside reaction tank 4, and evaluates the treatment effect, and the bottom of reaction tank 4 is installed with drain 13, is used to discharge the sewage after processing.

[0026] The electromagnetic adsorption mechanism of the embodiment comprises two symmetrically installed electromagnetic adsorbers 2, the electromagnetic adsorbers 2 are provided with arc-shaped magnetic conductive plates 2-3 on the front side of the mounting seat 2-2, the arc-shaped magnetic conductive plates 2-3 are fixed on the outer side wall of the reaction tank 4 through glue, the mounting seat 2-2 is provided with electromagnets 2-1, the electromagnets 2-1 are powered on, the arc-shaped magnetic conductive plates 2-3 adsorb the iron powder 12 in the reaction tank 4 on the inner wall of the reaction tank 4, and the spraying mechanism 6 is convenient for cleaning the iron powder 12.

[0027] The exhaust structure 8 of the embodiment comprises a deodorization tank, the deodorization tank is communicated with the reaction tank 4 through a pipeline, the deodorization tank is provided with activated carbon, the deodorization tank is provided with an exhaust hole at the top, and the organic components generated by the treatment of the organic sewage in the reaction tank 4, such as toluene, ethylbenzene, dimethylbenzene, dichloromethane, trichloromethane, polycyclic aromatic hydrocarbons and phenols, are discharged after being filtered and deodorized by the deodorization tank, so that environmental pollution is reduced.

[0028] The electronic liquid level meter 9 of the embodiment is used for monitoring the liquid level of sewage in the reaction tank 4 in real time.

[0029] The working principle of the utility model is as follows:

[0030] The cathode plate 11 in the reaction tank 4 and the anode rod 7 form a glow discharge plasma system, when powered on, the anode rod 7 and the cathode plate 11 will produce glow discharge, the discharge can generate plasma, and the plasma can generate strong oxidizing free radicals such as hydroxyl radicals, sulfate radicals and chlorine radicals in situ in the reaction tank 4. These free radicals have strong oxidizing ability and can oxidize the refractory organic pollutants in water into small molecules, low-toxic or non-toxic substances. The reaction tank 4 is provided with iron powder 12, the iron powder 12 can act as a catalyst in the glow discharge process, enhance the efficiency of the oxidation reaction, and promote the decomposition of the organic pollutants, meanwhile, the rotating magnetic field generated by the magnetic stirrer 1 can make the iron powder 12 generate vortex in the organic sewage, and the oxidation efficiency is improved. After the reaction is completed, the anode rod 7 and the cathode plate 11 are powered off, the treated wastewater is discharged, the electromagnetic adsorption mechanism is powered on, the iron powder 12 is adsorbed on the inner wall of the reaction tank 4, the spraying mechanism 6 cleans the iron powder 12, and the reuse of the iron powder 12 is realized.

Claims

1. A glow discharge laboratory organic wastewater treatment device, characterized by: A reaction tank is provided on the magnetic stirrer, and an anode rod, a spray mechanism, a sewage inlet, and an exhaust structure are provided on the top of the reaction tank. The anode rod is located at the center of the top of the reaction tank, and a bracket is provided in the middle and lower part of the reaction tank. A cathode plate is provided on the bracket. The cathode plate is located directly below the anode rod and forms a glow discharge plasma system with the anode rod. Iron powder is placed in the reaction tank, and an electromagnetic adsorption mechanism for fixing the iron powder is provided on the outer wall of the reaction tank. A drain outlet is provided at the bottom of the reaction tank.

2. The organic wastewater treatment device based on glow discharge laboratory according to claim 1 is characterized in that: The spray mechanism is as follows: a water distribution ring is provided with a water inlet pipe and three nozzles distributed at 120 degrees, the water inlet pipe extends out of the top of the reaction tank, the water distribution ring is located at the top center of the reaction tank, and the anode rod passes through the water distribution ring.

3. The organic wastewater treatment device based on glow discharge laboratory according to claim 1 is characterized in that: The electromagnetic adsorption mechanism includes two symmetrically arranged electromagnetic adsorbers, wherein the electromagnetic adsorbers are provided with an arc-shaped magnetic conductive plate on the front side of the mounting seat, and an electromagnet is provided inside the mounting seat.

4. The organic wastewater treatment device based on glow discharge laboratory according to claim 1 is characterized in that: The reaction tank body is a glass tank body.

5. The glow discharge laboratory organic wastewater treatment device according to claim 4, characterized in that: A colorimeter is provided on the outer side wall of the reaction tank.

6. The glow discharge laboratory organic wastewater treatment device according to claim 1, characterized in that: The exhaust structure is as follows: the deodorizing box is connected to the reaction tank through a pipeline, activated carbon is arranged in the deodorizing box, and an exhaust hole is arranged on the top of the deodorizing box.

7. The glow discharge laboratory organic wastewater treatment device according to claim 1, characterized in that: The anode rod is a platinum rod or a stainless steel rod.

8. The glow discharge laboratory organic wastewater treatment device according to claim 1, characterized in that: The cathode plate is a graphite plate.

9. The glow discharge laboratory organic wastewater treatment device according to claim 1, characterized in that: An electronic liquid level gauge is provided in the reaction tank.

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