CN212356877U

CN212356877U - Photocatalysis decomposition device of bromate

Info

Publication number: CN212356877U
Application number: CN202020768704.4U
Authority: CN
Inventors: 陈为刚
Original assignee: Shenzhen Jiuda Light Industrial Machinery Co ltd
Current assignee: Shenzhen Jiuda Light Industrial Machinery Co ltd
Priority date: 2020-05-11
Filing date: 2020-05-11
Publication date: 2021-01-15
Anticipated expiration: 2030-05-11

Abstract

The utility model provides a photocatalytic decomposition device of bromate, its includes reaction vessel, photocatalytic decomposition unit, monitor unit and control center, photocatalytic decomposition unit and monitor unit all are connected with the control system electricity, both ends all are provided with photocatalytic decomposition unit about reaction vessel, reaction vessel's the lower right corner is provided with the water inlet, reaction vessel's the upper left corner is provided with the delivery port, monitor unit sets up the intermediate position at the reaction vessel top, and monitor unit monitors the light irradiation dosage of photocatalytic decomposition unit in real time. By utilizing the device, the ozone disinfection process can be achieved without reducing the adding amount of ozone, the existence of the formed disinfection by-product bromate is eliminated by catalytic decomposition, and the device has the advantages of simple structure, convenient operation and wide application range.

Description

Photocatalysis decomposition device of bromate

Technical Field

The utility model relates to a technical field of drinking water treatment process especially relates to a photocatalysis decomposition control device of 2B class carcinogen bromate under packing water ozone sterilization technology.

Background

Ozone disinfection refers to a water treatment technique using ozone as a disinfectant. Ozone is a strong oxidant, and after dissolved in water, inorganic matters and organic matters in the water are directly oxidized or indirectly oxidized by using a large amount of hydroxyl radicals and nascent oxygen generated in the reaction, and the inorganic matters and the organic matters enter cells of bacteria to oxidize intracellular organic matters, so that the aims of sterilizing and purifying the water quality are fulfilled. The thoroughness of ozone sterilization is not doubtful, the inactivation reaction of ozone to bacteria is always carried out very quickly, the ozone has obvious inactivation effect to almost all bacteria, viruses, fungi, protozoa, oocysts and the like, compared with chlorination, the ozone disinfectant has quick action and better disinfection effect, and can improve the taste and the impression of water, and the ozone is increasingly used in drinking water treatment as a substitute method for chlorination.

However, when ozone oxidizes raw water containing bromide ions, bromate is generated and is set as a 2B-grade potential carcinogen by the international cancer research organization, the WHO recommends that the maximum bromate content of drinking water is 25 mug/L, and the maximum allowable concentration of bromate specified in the drinking water standard of the United States Environmental Protection Agency (USEPA) is 10 mug/L. Packaging water production enterprises generally control the generation amount of bromate in water by reducing the adding amount of ozone concentration in water, but finished water low-concentration ozone simultaneously brings a series of quality control problems of incomplete killing of pathogenic bacteria in water, quality guarantee period and the like.

The generation of bromate in the ozone oxidation process has two ways of ozone oxidation and ozone/hydroxyl radical oxidation, and the control of bromate can be carried out from two aspects of controlling the formation and removing after the generation. The pH reduction, ammonia gas addition, chlorine-ammonia process, and optimization of ozonation conditions are methods to control bromate formation, which can be removed by physical, chemical, and biological methods.

Over the past decades, TiO₂Photocatalysis has strong light degradation capability to pollutants difficult to degrade, and the photocatalysis is attracting more and more attention. However, at present, it is difficult to apply TiO with high efficiency in the process of drinking water treatment₂Photocatalysis, use cost is higher, and catalytic efficiency is lower. The prior art discloses a method for removing bromate in water by homogeneous phase photocatalysis (application number: 201711047194.0), which specifically comprises the steps of adding a reducing agent into water containing bromate to be treated, stirring, and carrying out ultraviolet light irradiationIrradiating by external light to generate reductive free radicals, and performing reduction reaction to remove bromate in water. The method utilizes ultraviolet light to irradiate the reducing agent to generate reducing free radicals to perform oxidation-reduction reaction to achieve the aim of removing bromate, the reducing agent is a conventional reducing agent with lower price, the bromate removing efficiency can reach more than 99 percent, the final product is bromide ions, other toxic and harmful substances are not introduced, the operation is simple, the condition is mild and easy to control, and the aim of removing the bromate in water with economy, high efficiency, no secondary pollution, mild condition and strong water quality adaptability is achieved.

Disclosure of Invention

Based on this, the utility model provides a photocatalysis decomposition controlling means of 2B class carcinogen bromate under packing water ozone sterilization technology utilizes the device, both can not reduce the input volume of ozone, has reached the ozone disinfection process, and the existence of the disinfection accessory substance bromate that forms has been eliminated in catalytic decomposition again, and the device's simple structure, convenient operation, application scope is wide.

To achieve the above object, the present invention is implemented as follows:

the utility model provides a photocatalytic decomposition device of bromate, its characterized in that includes reaction vessel, photocatalytic decomposition unit, monitor cell and control center, photocatalytic decomposition unit and monitor cell all are connected with the control system electricity, both ends all are provided with photocatalytic decomposition unit about reaction vessel, reaction vessel's the lower right corner is provided with the water inlet, reaction vessel's the upper left corner is provided with the delivery port, monitor cell sets up the intermediate position at the reaction vessel top, and monitor cell monitors the light irradiation dosage of photocatalytic decomposition unit in real time.

The photocatalytic decomposition unit is arranged at the left end and the right end of the reaction container, the drinking water in the reaction container can be subjected to ultraviolet photocatalytic decomposition of bromate at the same time, the monitoring unit can be used for monitoring the light irradiation dose in the reaction container in real time, the irradiation dose plays a key role in the bromate decomposition rate, and the luminous performance of the photocatalytic decomposition unit is attenuated along with the use time to cause dose change, wherein the monitoring unit belongs to the prior art, and detailed description is not provided herein. The water outlet and the water inlet of the reaction vessel are respectively arranged at the upper left corner and the lower right corner, so that the retention time of drinking water in the reaction vessel can be prolonged, and the effect of photolysis catalysis is ensured.

Further, the photocatalytic decomposition unit comprises an ultraviolet lamp, and the wavelength range of the ultraviolet lamp is 200-300 nm. Experiments and applications show that the decomposition efficiency of ultraviolet bromate in a specific wave band within 200-300nm is the highest, and the irradiation dose of the ultraviolet light can be adjusted according to different water qualities.

Further, the reaction vessel is a horizontal cylindrical vessel. The reaction container is horizontally placed, so that the distance from the water inlet to the water outlet can be prolonged, and the reaction time of decomposing bromate by photocatalysis can be prolonged.

Furthermore, the device also comprises a base, and the reaction vessel and the photocatalytic decomposition unit are arranged on the base.

The effective method of decomposing bromate by using ultraviolet light waves is used for technological recombination, and the ultraviolet light irradiation dose and the wave spectrum section which are matched are adopted to carry out ultraviolet light targeted catalytic degradation with special wave band and reasonable dose on the sterilized water containing bromate after ozone oxidation, so that bromate molecules in the water are cracked and reduced into nontoxic bromide, and thus, the ozone disinfection process is achieved, and the existence of the formed disinfection by-product bromate is eliminated through catalytic decomposition. The process solves the process pain point of the packaging water ozonization byproduct, and has wide application range and remarkable economic benefit.

The ozone disinfection device has the advantages that the ozone disinfection process is achieved without reducing the adding amount of ozone, the formed disinfection by-product bromate is eliminated through catalytic decomposition, and the ozone disinfection device is simple in structure, convenient to operate and wide in application range.

Drawings

FIG. 1 is a schematic view showing the structure of a photocatalytic decomposition apparatus for a bromate.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.

Refer to fig. 1.

The utility model provides a photocatalytic decomposition device of bromate, its characterized in that includes reaction vessel 1, photocatalytic decomposition unit 2, monitor cell 3 and control center (not shown), photocatalytic decomposition unit 2 and monitor cell 3 all are connected with control system electricity, both ends all are provided with photocatalytic decomposition unit 2 about reaction vessel 1, the lower right corner of reaction vessel 1 is provided with water inlet 11, the upper left corner of reaction vessel 1 is provided with delivery port 12, monitor cell 3 sets up the intermediate position at reaction vessel 1 top, monitor cell 3 monitors the light irradiation dosage of photocatalytic decomposition unit 2 in real time.

Both ends all are provided with photocatalytic decomposition unit 2 about reactor 1, can carry out ultraviolet catalysis to the drinking water in reactor 1 simultaneously and decompose the bromate, and can utilize monitoring unit 3 to carry out real-time supervision to the light irradiation dose in reactor 1, and the irradiation dose plays key effect to bromate decomposition rate, and the luminous performance of photocatalytic decomposition unit can lead to the dose to change along with the decay of live time, and wherein, monitoring unit belongs to prior art, does not do the detailed description here. The water outlet 12 and the water inlet 11 of the reaction vessel 1 are respectively arranged at the upper left corner and the lower right corner, so that the retention time of drinking water in the reaction vessel 1 can be prolonged, and the effect of photolysis catalysis is ensured.

In the present embodiment, the photocatalytic decomposition unit 2 includes an ultraviolet lamp having a wavelength of 200-300 nm. Experiments and applications show that the decomposition efficiency of the ultraviolet bromate in a specific wave band within 200-300nm is highest, and the irradiation dose of the ultraviolet can be adjusted according to different water qualities.

In the present embodiment, the reaction vessel 1 is a horizontal cylindrical vessel. The reaction container is horizontally placed, so that the distance from the water inlet to the water outlet can be prolonged, and the reaction time of decomposing bromate by photocatalysis can be prolonged.

In this embodiment, the apparatus further includes a base 4, and the reaction vessel 1 and the photocatalytic decomposition unit 2 are disposed on the base 4.

The technological process of photocatalytic decomposition of packed drinking water with the apparatus includes:

s1, feeding the treated deep purified water into an ozone adding system;

s2, supplying ozone by an ozone generating device, adding the ozone into an ozone adding system, and carrying out ozone sterilization on the deep purified water;

s3, the deeply purified water after ozone sterilization enters a sanitary water tank for storage,

s4, pumping water in the sanitary water tank into a reaction container through a lifting pump, and decomposing bromate under the catalysis of ultraviolet light;

s5, the monitoring unit monitors the light irradiation dose in real time, then judges the decomposition condition of bromate, enters a storage box for temporary storage after the bromate is decomposed into bromide, detects the residual ozone amount by adopting an ozone residual detector, and fills qualified sterile water.

The above description is only exemplary of the present invention and should not be taken as limiting the scope of the present invention, as any modifications, equivalents, improvements and the like made within the spirit and principles of the present invention are intended to be included within the scope of the present invention.

Claims

1. The utility model provides a photocatalytic decomposition device of bromate, its characterized in that includes reaction vessel, photocatalytic decomposition unit, monitor cell and control center, photocatalytic decomposition unit and monitor cell all are connected with the control system electricity, both ends all are provided with photocatalytic decomposition unit about reaction vessel, reaction vessel's the lower right corner is provided with the water inlet, reaction vessel's the upper left corner is provided with the delivery port, monitor cell sets up the intermediate position at the reaction vessel top, and monitor cell monitors the light irradiation dosage of photocatalytic decomposition unit in real time.

2. The apparatus for photocatalytic decomposition of a bromate according to claim 1, wherein said photocatalytic decomposition unit comprises an ultraviolet lamp having a wavelength in the range of 200-300 nm.

3. The apparatus for photocatalytic decomposition of a bromate according to claim 1, wherein said reaction vessel is a horizontal cylindrical vessel.

4. The apparatus for photocatalytic decomposition of a bromate according to claim 1, further comprising a base on which the reaction vessel and the photocatalytic decomposition unit are disposed.