CN211688372U

CN211688372U - Chemical oxidation-photocatalysis combined device

Info

Publication number: CN211688372U
Application number: CN201922295149.8U
Authority: CN
Inventors: 赵国萍; 刘阳桥; 孙盛睿; 王杨杨; 李娜; 刘璐; 黄怡燊; 柯昌华
Original assignee: Shanghai Institute of Ceramics of CAS; Zhejiang Tiandi Environmental Protection Technology Co Ltd
Current assignee: Shanghai Institute of Ceramics of CAS; Zhejiang Tiandi Environmental Protection Technology Co Ltd
Priority date: 2019-12-19
Filing date: 2019-12-19
Publication date: 2020-10-16
Anticipated expiration: 2029-12-19

Abstract

The utility model relates to a chemical oxidation-photocatalysis allies oneself with uses device, include: the main box body mainly comprises a light-transmitting reaction space and a light-tight light source space, and the two spaces are separated by a light-transmitting partition plate; an aeration device is laid at the bottom of the reaction space; a liquid inlet, a medicine inlet and a liquid outlet are formed in the side surface of the reaction space; a catalyst is disposed in the reaction space. The utility model has the advantages that: the chemical oxidation-photocatalysis combined device of the utility model can simultaneously utilize the combined action of the natural light source and the artificial light source, and utilize the high-efficiency catalyst to realize the deep degradation of the high-salt high-ammonia nitrogen wastewater by combining the chemical oxidation action; the sunlight and the artificial light source can be simultaneously utilized, and the advantages of low price of the sunlight and controllability of the artificial light source are taken into consideration; the utility model can not only utilize the solid-carried catalyst, but also take off the objective table to use the dispersed powder catalyst, and has wide applicability; the case lid can be opened, and convenient and agitating unit are external, and is compatible strong.

Description

Chemical oxidation-photocatalysis combined device

Technical Field

The utility model relates to a processing apparatus of high salt high ammonia-nitrogen concentration waste water, in particular to chemical oxidation-photocatalysis allies oneself with uses device.

Background

In recent years, with the increasing expansion of urban population and the continuous development of industry, water environment pollution accidents frequently occur, and serious harm is caused to human survival. Wherein the eutrophication of the water body is serious, and the production life and ecological balance of human beings are directly threatened. The ammonia nitrogen inorganic pollutant is one of the main factors causing water eutrophication, a large amount of ammonia nitrogen can cause aquatic organisms taking a nitrogen source as a nutrient substance to propagate in a large amount to destroy the water environment balance, and meanwhile, released algal toxins can enter a food chain through fishes to harm human health. And ammonia nitrogen is also a high-oxygen-consumption substance, and oxidation of ammonia nitrogen consumes a large amount of dissolved oxygen in water, so that aquatic organisms are anoxic and dead, and the water quality is directly deteriorated. In addition, nitrite, an oxidation product of ammonia nitrogen, has strong toxicity. Lower concentrations of nitrite can reduce the resistance of aquatic animals and cause infections with various diseases.

The treatment technology for ammonia nitrogen wastewater is various, and mainly comprises a physical method, a chemical method, a biological method and the like. Wherein the physical method comprises reverse osmosis, distillation, soil irrigation and other technologies; the chemical method comprises the technologies of ion exchange, ammonia stripping, breakpoint chlorination, incineration, catalytic cracking, electrodialysis, electrochemical treatment and the like; the biological method comprises algae cultivation, biological nitrification, immobilized biotechnology and the like. Although the treatment technology has various types and characteristics, the treatment technology has certain limitations, or has the problems of large equipment investment, high energy consumption, high operating cost, secondary pollution caused by emission into the air and the like in different degrees. Therefore, in order to integrate the characteristics and advantages of different treatment methods, at present, more than two processes are generally combined for treating the high-concentration ammonia nitrogen wastewater, for example, an ammonia stripping method or a chemical precipitation method is firstly adopted to treat the high-concentration ammonia nitrogen wastewater to a medium concentration range (100 plus 200mg/L), and then a biological method, a breakpoint chlorination method and the like are utilized to treat the high-concentration ammonia nitrogen wastewater to a discharge concentration. However, the conventional methods are difficult to adapt to the treatment requirements of high-salt high-ammonia nitrogen wastewater under new potential. The main reasons are as follows: the wastewater quality is complex: industrial high ammonia nitrogen wastewater is often accompanied by high-salt and high-toxicity organic matters such as power plant wastewater, landfill leachate, membrane filtration concentrated water and the like, and the traditional rear-end biological denitrification technology cannot be used; secondly, the discharge standard of the ammonia nitrogen wastewater is improved: along with the implementation of a series of new environmental regulations and stricter water quality discharge standards, the discharge concentration of ammonia nitrogen wastewater is changed from 25mg/L of a secondary standard to a primary standard (15mg/L) which is widely implemented at present, and the discharge concentration of ammonia nitrogen wastewater has a more and more severe trend, and the conventional treatment means is difficult to stably reach the standard; ③ Secondary pollution caused by the water treatment process itself does not vary in a small amount: the safety and environmental friendliness of the water treatment method are more and more emphasized, and the methods such as breakpoint chlorination and the like are limited due to secondary pollution.

The photocatalysis technology is a promising new water treatment technology researched and developed in recent years, and has led to wide applicationAttention is paid to the method. The photocatalytic process is an advanced oxidation process for removing pollutants from wastewater, mainly using TiO₂The semiconductor nano particles or compound semiconductor as the representative is used as the photocatalyst, and simultaneously, the light radiation with certain energy is combined, hydroxyl free radicals with strong oxidability are formed on the surface, and the pollutants are completely or partially mineralized by hydroxyl addition, substitution, electron transfer and the like between the hydroxyl free radicals and organic pollutants, carbon nitrogen, ammonia nitrogen and other inorganic pollutants in the wastewater, so that the purpose of degrading the pollutants is finally achieved. Since the hydroxyl radical has an oxidation-reduction potential as high as 2.8V, many pollutants which are difficult to degrade, such as halogenated hydrocarbons, organic phosphorus compounds, pesticides, surface active agents, organic dyes and the like, can achieve obvious degradation effect through photocatalytic oxidation. The photocatalysis method is combined with the traditional chemical oxidation method, and a novel ammonia nitrogen wastewater treatment integration technology with low operation cost, wide application range and good effluent quality is formed, so that the core competitiveness of the market is formed, and the application prospect is extremely wide.

SUMMERY OF THE UTILITY MODEL

The utility model aims at overcoming the not enough among the prior art, provide a chemical oxidation-photocatalysis allies oneself with uses device, can overcome the inherent not enough in the aspect of the high ammonia-nitrogen wastewater treatment of high salt of present traditional technology, performance chemical oxidation and photocatalysis treatment's synergistic coupling effect realizes the processing to reach standard of high concentration ammonia-nitrogen wastewater.

The chemical oxidation-photocatalysis combined device comprises a main box body, wherein the main box body mainly comprises a light-transmitting reaction space and a light-tight light source space, and the two spaces are separated by a light-transmitting partition plate; an aeration device is laid at the bottom of the reaction space; a liquid inlet, a medicine inlet and a liquid outlet are formed in the side surface of the reaction space; a catalyst is placed in the reaction space; an artificial light source is arranged in the light source space.

Preferably, the method comprises the following steps: the top of the reaction space is provided with a box cover, and the reaction space and the box cover are separated; and a serrated catalyst carrying table is arranged in the reaction space and used for the directional arrangement of the solid-supported catalyst.

Preferably, the method comprises the following steps: the sawtooth part of the sawtooth-shaped catalyst object stage faces upwards and forms a certain inclination angle with the bottom edge.

Preferably, the method comprises the following steps: the immobilized catalyst is a plate-shaped, strip-shaped, net-shaped or film-shaped immobilized object with the surface coated with catalyst powder, and the immobilized object is a ceramic tile, an aluminum plate, an iron plate or glass fiber.

Preferably, the method comprises the following steps: the reaction space is of an open structure and is externally connected with a stirring device.

Preferably, the method comprises the following steps: and mirror coatings are arranged on the side surface and the bottom of the lightproof light source space.

Preferably, the method comprises the following steps: the aeration device is one or more of an aeration head, an aeration disc or an air bubble generator.

Preferably, the method comprises the following steps: the liquid inlet and the medicine inlet are arranged on the upper part of the side surface of the reaction space, and the liquid outlet is arranged on the lower part of the side surface of the reaction space.

Preferably, the method comprises the following steps: the artificial light source is one or more of an LED ultraviolet light source, an LED visible light source, a mercury lamp or an incandescent lamp.

The utility model has the advantages that:

1) the utility model discloses a chemical oxidation-photocatalysis allies oneself with uses the device and can utilize natural light source and artificial light source combined action simultaneously to combine chemical oxidation, utilize high-efficient catalyst to realize the degree of depth degradation of high salt high ammonia-nitrogen concentration waste water.

2) The utility model discloses can utilize sunlight and artificial light source simultaneously, compromise the low price of sunlight and the controllable advantage of artificial light source.

3) The photocatalysis function and the chemical oxidation function of the utility model are mutually independent, can be respectively used independently and can also be combined to act, thereby meeting different requirements.

4) The utility model discloses can utilize the solid-supported catalyst, also can take off the objective table and use dispersed powder catalyst, extensive applicability.

5) The utility model discloses a case lid can be opened, and is convenient external with agitating unit, and is compatible strong.

Drawings

FIG. 1 is a schematic perspective view of a combination chemical oxidation-photocatalytic apparatus according to example 1;

FIG. 2 is a front view of the combination chemical oxidation-photocatalytic device of example 1;

FIG. 3 is a schematic view of the serrated catalyst stage configuration of example 1;

FIG. 4 is a schematic perspective view of the combination chemical oxidation-photocatalytic apparatus of example 2.

Description of reference numerals: 1-a light-transmitting partition; 2-an aeration device; 3-liquid inlet; 4-a medicine inlet; 5-a liquid discharge port; 6-a serrated catalyst stage; 7-artificial light source; 8-a stirring device; 9-a box cover; 100-a reaction space; 200-light source space.

Detailed Description

The present invention will be further described with reference to the following examples. The following description of the embodiments is merely provided to aid in understanding the invention. It should be noted that, for those skilled in the art, without departing from the principle of the present invention, the present invention can be further modified and modified, and such modifications and modifications also fall within the protection scope of the appended claims.

Example 1:

as shown in fig. 1-3, the chemical oxidation-photocatalytic combination device comprises a main box body, which mainly comprises a light-transmitting reaction space 100 and a light-tight light source space 200, wherein the two spaces are separated by a light-transmitting partition board 1. The bottom of the reaction space 100 is paved with an aeration device 2, which is beneficial to mass transfer reaction. The side surface of the reaction space 100 is provided with a liquid inlet 3, a medicine inlet 4 and a liquid outlet 5, and a serrated catalyst stage 6 is arranged in the reaction space 100 and used for the directional arrangement of the immobilized catalyst. The artificial light source 7 is provided in the light source space 200.

The main box body comprises a box cover 9 and a box body, the box cover 9 is arranged at the top of the box body, and the box body and the box cover 9 are separated.

The lateral surface and the bottom of the lightproof light source space 200 are provided with mirror coatings, so that light energy generated by a light source can be reflected to enter the reaction space 100, and the light energy utilization rate is improved.

The aeration device 2 is one or more of an aeration head, an aeration disc or an air bubble generator.

The liquid inlet 3 and the medicine inlet 4 are arranged at the upper part of the side surface of the reaction space 100, and the liquid outlet 5 is arranged at the lower part of the side surface of the reaction space 100. The wastewater to be treated can enter from the liquid inlet 3 and flow out from the liquid outlet 5 after the treatment. The medicine inlet 4 on the side wall facilitates the addition of chemical oxidant.

The sawtooth part of the sawtooth-shaped catalyst carrying platform 6 is upward and forms a certain inclination angle with the bottom edge, which is beneficial to fixing the solid-supported catalyst and receiving the light energy provided by the bottom light source.

The immobilized catalyst is a plate-shaped, strip-shaped, net-shaped or film-shaped immobilized object with catalyst powder adhered to the surface, and the carrier can be ceramic tiles, aluminum plates, iron plates, glass fibers and the like.

The artificial light source 7 is one or more of an LED ultraviolet light source, an LED visible light source, a mercury lamp or an incandescent lamp.

When the chemical oxidation-photocatalysis combined device is used, the deep degradation of the high-salt high-ammonia nitrogen wastewater is realized by utilizing the catalyst to generate high-concentration active free radicals through the synergistic catalysis effect.

Example 2:

the chemical oxidation-photocatalytic combination device of example 2 has substantially the same structure as that of example 1, except that the main case body is not provided with the case cover 9 and has an open structure, the catalyst stage is removable to facilitate the use of the powder catalyst, and the stirring device 8 is externally connected to achieve the dispersion of the catalyst powder.

Claims

1. A chemical oxidation-photocatalysis combined device is characterized in that: the device comprises a main box body, wherein the main box body mainly comprises a light-transmitting reaction space (100) and a light-tight light source space (200), and the two spaces are separated by a light-transmitting partition plate (1); an aeration device (2) is paved at the bottom of the reaction space (100); a liquid inlet (3), a medicine inlet (4) and a liquid outlet (5) are formed in the side surface of the reaction space (100); a catalyst is placed in the reaction space (100); an artificial light source (7) is arranged in the light source space (200).

2. The combined chemical oxidation-photocatalytic device according to claim 1, characterized in that: the top of the reaction space (100) is provided with a box cover (9), and the reaction space (100) and the box cover (9) are separated; and a zigzag catalyst stage (6) is arranged in the reaction space (100) and is used for the directional arrangement of the solid-supported catalyst.

3. The combined chemical oxidation-photocatalytic device according to claim 2, characterized in that: the sawtooth parts of the sawtooth-shaped catalyst carrying platform (6) are upward and form a certain inclination angle with the bottom edge.

4. The combined chemical oxidation-photocatalytic device according to claim 2, characterized in that: the immobilized catalyst is a plate-shaped, strip-shaped, net-shaped or film-shaped immobilized object with the surface coated with catalyst powder, and the immobilized object is a ceramic tile, an aluminum plate, an iron plate or glass fiber.

5. The combined chemical oxidation-photocatalytic device according to claim 1, characterized in that: the reaction space (100) is of an open structure and is externally connected with a stirring device (8).

6. The combined chemical oxidation-photocatalytic device according to claim 1, characterized in that: the lateral surface and the bottom of the lightproof light source space (200) are provided with mirror coatings.

7. The combined chemical oxidation-photocatalytic device according to claim 1, characterized in that: the aeration device (2) is one or more of an aeration head, an aeration disc or an air bubble generator.

8. The combined chemical oxidation-photocatalytic device according to claim 1, characterized in that: the liquid inlet (3) and the medicine inlet (4) are arranged at the upper part of the side surface of the reaction space (100), and the liquid outlet (5) is arranged at the lower part of the side surface of the reaction space (100).

9. The combined chemical oxidation-photocatalytic device according to claim 1, characterized in that: the artificial light source (7) is one or more of an LED ultraviolet light source, an LED visible light source, a mercury lamp or an incandescent lamp.