CN111943314A - Cavity type ultraviolet sterilizer - Google Patents
Cavity type ultraviolet sterilizer Download PDFInfo
- Publication number
- CN111943314A CN111943314A CN202010890957.3A CN202010890957A CN111943314A CN 111943314 A CN111943314 A CN 111943314A CN 202010890957 A CN202010890957 A CN 202010890957A CN 111943314 A CN111943314 A CN 111943314A
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- CN
- China
- Prior art keywords
- ultraviolet lamp
- lamp tube
- ultraviolet
- sleeve
- cavity
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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- 238000004659 sterilization and disinfection Methods 0.000 claims abstract description 62
- 239000011521 glass Substances 0.000 claims abstract description 15
- 230000001954 sterilising effect Effects 0.000 abstract description 26
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 abstract description 21
- 230000000694 effects Effects 0.000 abstract description 6
- 238000000034 method Methods 0.000 description 11
- 230000005855 radiation Effects 0.000 description 10
- 230000008859 change Effects 0.000 description 5
- 230000008878 coupling Effects 0.000 description 3
- 238000010168 coupling process Methods 0.000 description 3
- 238000005859 coupling reaction Methods 0.000 description 3
- 239000010865 sewage Substances 0.000 description 3
- 238000010521 absorption reaction Methods 0.000 description 2
- 230000002238 attenuated effect Effects 0.000 description 2
- 238000004364 calculation method Methods 0.000 description 2
- 244000005700 microbiome Species 0.000 description 2
- 238000000053 physical method Methods 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 229910001220 stainless steel Inorganic materials 0.000 description 2
- 239000010935 stainless steel Substances 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- 238000002834 transmittance Methods 0.000 description 2
- 241000894006 Bacteria Species 0.000 description 1
- CBENFWSGALASAD-UHFFFAOYSA-N Ozone Chemical compound [O-][O+]=O CBENFWSGALASAD-UHFFFAOYSA-N 0.000 description 1
- 238000002835 absorbance Methods 0.000 description 1
- 238000005660 chlorination reaction Methods 0.000 description 1
- 230000000249 desinfective effect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 230000002779 inactivation Effects 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000002955 isolation Methods 0.000 description 1
- 230000000813 microbial effect Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000007800 oxidant agent Substances 0.000 description 1
- 230000001590 oxidative effect Effects 0.000 description 1
- 239000008399 tap water Substances 0.000 description 1
- 235000020679 tap water Nutrition 0.000 description 1
Images
Classifications
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/30—Treatment of water, waste water, or sewage by irradiation
- C02F1/32—Treatment of water, waste water, or sewage by irradiation with ultraviolet light
- C02F1/325—Irradiation devices or lamp constructions
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2201/00—Apparatus for treatment of water, waste water or sewage
- C02F2201/32—Details relating to UV-irradiation devices
- C02F2201/322—Lamp arrangement
- C02F2201/3223—Single elongated lamp located on the central axis of a turbular reactor
Landscapes
- Health & Medical Sciences (AREA)
- Toxicology (AREA)
- Life Sciences & Earth Sciences (AREA)
- Hydrology & Water Resources (AREA)
- Engineering & Computer Science (AREA)
- Environmental & Geological Engineering (AREA)
- Water Supply & Treatment (AREA)
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Physical Water Treatments (AREA)
Abstract
The invention discloses a cavity type ultraviolet sterilizer, which belongs to the field of water supply and drainage sterilization and comprises an ultraviolet lamp tube, a sleeve and a sterilization cavity, wherein the ultraviolet lamp tube is positioned in the sleeve; when the ultraviolet lamp tube is one, the difference between the inner diameter R of the disinfection cavity and the outer diameter R of the glass sleeve required by the ultraviolet lamp tube is less than or equal to the maximum effective distance d of the ultraviolet lamp tube0(ii) a When the number of the ultraviolet lamp tubes is at least two, the maximum effective distance of the sleeve required by a single ultraviolet lamp tube to the inner wall of the disinfection cavity is d1Distance s from the outer diameter of the sleeve tube to the inner wall of the disinfection cavity required by the ultraviolet lamp tube1≤d1(ii) a The maximum effective distance of the single ultraviolet lamp tube to the center of the disinfection cavity is d2Distance s from the outer diameter of the sleeve tube required by the ultraviolet lamp tube to the center of the disinfection cavity2≤d2The ultraviolet lamp tube arrangement positions in the ultraviolet sterilizer are optimized, so that the ultraviolet light intensity in the sterilization cavity is optimally distributed, the optimal effect of ultraviolet sterilization on the water body is achieved, and the sterilization effect and efficiency are obviously improved.
Description
Technical Field
The invention relates to the technical field of water supply and drainage disinfection, in particular to a cavity type ultraviolet sterilizer.
Background
In the field of water treatment, sewage and municipal water needs to be disinfected, and in the process of disinfecting the water, commonly adopted disinfection methods can be divided into two main types, namely a chemical method and a physical method, wherein the chemical method generally comprises a chlorination method, an ozone method or other oxidant methods; physical methods include heating, ultraviolet, ultrasonic, and the like; both of these methods have advantages and disadvantages. Among them, ultraviolet sterilization is a common method for sterilization of sewage. Accordingly, uv disinfectors are common devices used in the field of sewage treatment and water supply.
The ultraviolet disinfection technology is that a certain ultraviolet lamp tube emits ultraviolet rays with specific wavelength to destroy the related molecular structures of microbial cells such as bacteria and the like, thereby achieving the aim of disinfection and sterilization; the ultraviolet dose is an important index for performing an ultraviolet disinfection process, and the ultraviolet radiation dose received by the microorganisms determines the inactivation degree of the microorganisms. The conventional ultraviolet sterilizer has limited structure, and thus has high sterilizing efficiency and high sterilizing effect.
Disclosure of Invention
The invention aims to provide a cavity type ultraviolet sterilizer to solve the problems.
In order to achieve the purpose, the technical scheme adopted by the invention is as follows: a cavity type ultraviolet sterilizer comprises an ultraviolet lamp tube, a sleeve and a sterilization cavity, wherein the ultraviolet lamp tube is positioned in the sleeve, the sleeve is positioned in the sterilization cavity, and the ultraviolet lamp tube and the sleeve are arranged in a set; the number of the ultraviolet lamp tubes is one or at least two, when the number of the ultraviolet lamp tubes is one, the difference between the inner diameter R of the disinfection cavity and the outer diameter R of the glass sleeve outside the ultraviolet lamp tubes is less than or equal to the maximum effective distance d of the ultraviolet lamp tubes0。
As a preferred calculation scheme: when the number of the ultraviolet lamp tubes is at least two, the maximum effective distance between the sleeve outside the single ultraviolet lamp tube and the inner wall of the disinfection cavity is d1The distance s from the outer diameter of the sleeve outside the single ultraviolet lamp tube to the inner wall of the disinfection cavity1Is less than or equal to d1(ii) a The maximum effective distance of the single ultraviolet lamp tube to the center of the disinfection cavity is d2Distance s from the outer diameter of the sleeve tube required by the ultraviolet lamp tube to the center of the disinfection cavity2Is less than or equal to d2。
The inventors of the present application have demonstrated through numerous experiments: the arrangement mode of ultraviolet tube can obviously influence radiation dose distribution, so, this application starts from ultraviolet tube's arrangement mode, improves ultraviolet disinfector's radiation dose distribution to improve ultraviolet disinfector's disinfection and isolation effect and efficiency.
Specifically, the ultraviolet light intensity will be attenuated with the increasing irradiation distance in water, and the initial light intensity I of the ultraviolet lamp tube is determined first0And the absorption coefficient k of the water body to the ultraviolet rays, and the light intensity I of any point away from the outer wall of the ultraviolet lamp tube is calculated by the Lambert-beer law1；
Then, according to the minimum requirement of ultraviolet sterilizer for water supply and drainage specified by national standard and the contact time of running water and lamp tube, the minimum light intensity I of dosage can be calculatedminCalculating the maximum effective distance d that a single ultraviolet lamp tube can irradiatemax(ii) a The change of the number of the ultraviolet lamp tubes in the same disinfection cavity can cause the change of the water flow velocity, thereby influencing the contact time of flowing water and the ultraviolet lamp tubes and finally leading the maximum effective distance d which can be irradiated by the ultraviolet lamp tubes0Is less than dmax。
Based on the theory, the invention designs the lamp tube arrangement scheme when a single ultraviolet lamp tube and a plurality of ultraviolet lamp tubes are adopted, thereby improving the radiation dose distribution of the ultraviolet sterilizer.
Compared with the prior art, the invention has the advantages that: according to the invention, the arrangement positions of the ultraviolet lamp tubes in the ultraviolet sterilizer are optimized, so that the ultraviolet light intensity in the sterilization cavity is optimally distributed, the optimal effect of ultraviolet sterilization on water is achieved, and the sterilization effect and efficiency are obviously improved.
Compared with the arrangement mode of the ultraviolet lamp tubes and the glass sleeves in the cavity of the traditional ultraviolet sterilizer, the optimized arrangement mode of the ultraviolet lamp tubes and the glass sleeves is adopted, so that the sterilization rate of the ultraviolet sterilizer can be designed from the traditional 63.11 percent (the cavity radius of the traditional sterilizer adopts the maximum effective distance which can be irradiated by the ultraviolet lamp tubes, such as ultraviolet rayThe inner diameter of the cavity of the linear sterilizer is 267mm, the maximum effective distance that the ultraviolet lamp tube can irradiate is 60mm, namely the irradiation distance corresponding to the minimum ultraviolet radiation intensity required by the ultraviolet effective dose specified in the national standard GB 19837) is increased to 90.40 percent and 100 percent, so that the sterilization rate in the ultraviolet sterilizing cavity can be 100 percent through the structural design of the ultraviolet sterilizing cavity, and the ultraviolet effective dose in the minimum radiation intensity area in the ultraviolet sterilizing cavity also meets the ultraviolet effective dose not less than 40mJ/cm specified in the national standard GB198372And the disinfection and sterilization effect is excellent.
Drawings
FIG. 1 is a schematic structural view of example 1 of the present invention;
fig. 2 is a schematic structural diagram of embodiment 2 of the present invention.
In the figure: 1. an ultraviolet lamp tube; 2. a sleeve; 3. and (4) sterilizing the cavity.
Detailed Description
The invention will be further explained with reference to the drawings.
Example 1:
referring to fig. 1, a cavity type ultraviolet sterilizer comprises an ultraviolet lamp tube 1, a sleeve 2 and a sterilization cavity 3, wherein the ultraviolet lamp tube 1 is positioned in the sleeve 2, the sleeve 2 is positioned in the sterilization cavity 3, and the ultraviolet lamp tube 1 and the sleeve 2 are arranged in a set;
in this embodiment 1, there is one ultraviolet lamp tube 1, the ultraviolet lamp tube has a length of 762mm, a rated power of 87W, and a radius r of 7.5 mm; the outer diameter of the glass sleeve is 23mm, the light transmittance is more than or equal to 0.85, and the glass sleeve and the ultraviolet lamp tube are concentrically and axially installed during installation; the ultraviolet disinfection cavity is made of stainless steel, the wall thickness is 3mm, and the inner diameter is 100 mm; initial value I of ultraviolet radiation intensity on surface of ultraviolet lamp tube0About 78mW/cm can be calculated according to the Keitz formula2(ii) a The ultraviolet light intensity emitted by the ultraviolet lamp tube can be attenuated along with the increase of the irradiation distance in water, and the initial light intensity I of the ultraviolet lamp tube is firstly determined0And the absorption coefficient k of the water body to the ultraviolet rays, and the light intensity I of any point away from the outer wall of the ultraviolet lamp tube is calculated by the Lambert-beer law1(ii) a Then, the water supply and drainage according to the national standardThe minimum requirement of the ultraviolet sterilizer and the contact time of the running water and the lamp tube can be used for calculating the minimum light intensity I reaching the dosageminCalculating the maximum effective distance d that a single ultraviolet lamp tube can irradiatemax(ii) a The change of the number of the ultraviolet lamp tubes in the same disinfection cavity can cause the change of the water flow velocity, thereby influencing the contact time of flowing water and the ultraviolet lamp tubes and finally leading the maximum effective distance d which can be irradiated by the ultraviolet lamp tubes0Is less than dmax。
In this embodiment, the water in the chamber of the uv sterilizer is tap water, and its absorbance of uv light (254nm) is 0.024 (measured by shimadzu uv spectrophotometer); the difference between the inner diameter R of the disinfection cavity and the outer diameter R of the glass sleeve required by the ultraviolet lamp tube is less than or equal to the maximum effective distance d of the ultraviolet lamp tube0The maximum effective distance d that a single ultraviolet lamp tube can irradiate can be calculated according to the minimum ultraviolet radiation dose specified in GB19837maxAbout 60mm, and the difference between the inner diameter R of the disinfection cavity and the outer diameter R of the glass sleeve required by the ultraviolet lamp tube in the embodiment is less than or equal to the maximum effective distance d of the ultraviolet lamp tube0Equal to the designed radius of the ultraviolet disinfection cavity, so the design of the ultraviolet disinfector of the embodiment meets the requirement of the ultraviolet radiation dose of all areas in the ultraviolet disinfection cavity.
Example 2:
referring to fig. 2, a cavity type ultraviolet sterilizer comprises an ultraviolet lamp tube 1, a sleeve 2 and a sterilization cavity 3, wherein the ultraviolet lamp tube 1 is positioned in the sleeve 2, the sleeve 2 is positioned in the sterilization cavity 3, and the ultraviolet lamp tube 1 and the sleeve 2 are arranged in a set;
in this embodiment, six ultraviolet lamp tubes 1 are provided, the ultraviolet lamp tubes are 762mm in length, the rated power is 87W, and the radius r is 7.5 mm; the outer diameter of the glass sleeve is 23mm, the light transmittance is more than or equal to 0.85, the glass sleeve and the ultraviolet lamp tube are in concentric axial direction when being installed, and the glass sleeve and the ultraviolet lamp tube are distributed in an annular array in the cavity of the ultraviolet sterilizer;
the ultraviolet disinfection cavity 3 is made of stainless steel, the wall thickness is 3mm, and the inner diameter is 273 mm; the intensity of the ultraviolet radiation received by any area in the disinfection chamber 3 can be measured according to the method 1The mentioned formula is calculated, but the difference between the inner diameter R of the disinfection cavity 3 and the outer diameter R of the glass sleeve required by the ultraviolet lamp tube 1 is smaller than or equal to the maximum effective distance d of the ultraviolet lamp tube 1 by taking the coupling factors of a plurality of ultraviolet lamp tubes 1 into consideration0Can change with the number of the lamp tubes. That is, when there are at least two ultraviolet lamp tubes 1, the maximum effective distance d of the sleeve 2 required by a single ultraviolet lamp tube 1 to the inner wall of the disinfection cavity 3 is1The distance s from the outer diameter of the sleeve 2 required by the ultraviolet lamp tube 1 to the inner wall of the disinfection cavity 31Is less than or equal to d1(ii) a The maximum effective distance of the single ultraviolet lamp tube 1 to the center of the disinfection cavity 3 is d2The distance s from the outer diameter of the sleeve pipe needed by the ultraviolet lamp tube 1 to the center of the disinfection cavity 32Is less than or equal to d2；
In this embodiment, as shown in fig. 2, when the coupling factor between the ultraviolet lamp tubes 1 is not considered, the difference between the inner diameter R of the disinfection chamber 3 and the outer diameter R of the glass sleeve 2 required by the ultraviolet lamp tubes 1 is less than or equal to the maximum effective distance d of the ultraviolet lamp tubes 10About 60mm (see example 1 for specific calculation), and the inner diameter R of the disinfection chamber 3 is less than or equal to d0+s0See fig. 2 (a);
when the coupling factor among a plurality of ultraviolet lamp tubes 1 is considered, the two situations can be divided into two situations, as shown in fig. 2(b) and fig. 2(c), the difference between the inner diameter R of the disinfection cavity 3 and the outer diameter R of the glass sleeve 2 required by the ultraviolet lamp tubes 1 is smaller than or equal to the maximum effective distance d of the ultraviolet lamp tubes 1 respectively1And d2Inner diameter d of the disinfection chamber 32+s2≤R≤d1+s1I.e., 171 mm. ltoreq. R.ltoreq.213 mm, see FIG. 2 (c).
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents and improvements made within the spirit and principle of the present invention are intended to be included within the scope of the present invention.
Claims (2)
1. A cavity type ultraviolet sterilizer is characterized in that: comprises an ultraviolet lamp tube, a sleeve and a disinfection cavity, wherein the ultraviolet lamp tube is positioned in the sleeve, and the sleeve isThe ultraviolet lamp tube and the sleeve are arranged in a whole set in the disinfection cavity; the number of the ultraviolet lamp tubes is one or at least two, when the number of the ultraviolet lamp tubes is one, the difference between the inner diameter R of the disinfection cavity and the outer diameter R of the glass sleeve outside the ultraviolet lamp tubes is less than or equal to the maximum effective distance d of the ultraviolet lamp tubes0。
2. A chamber uv disinfector according to claim 1, wherein: when the number of the ultraviolet lamp tubes is at least two, the maximum effective distance between the sleeve outside the single ultraviolet lamp tube and the inner wall of the disinfection cavity is d1The distance s from the outer diameter of the sleeve outside the single ultraviolet lamp tube to the inner wall of the disinfection cavity1Is less than or equal to d1(ii) a The maximum effective distance of the single ultraviolet lamp tube to the center of the disinfection cavity is d2Distance s from the outer diameter of the sleeve tube required by the ultraviolet lamp tube to the center of the disinfection cavity2Is less than or equal to d2。
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010890957.3A CN111943314A (en) | 2020-08-29 | 2020-08-29 | Cavity type ultraviolet sterilizer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010890957.3A CN111943314A (en) | 2020-08-29 | 2020-08-29 | Cavity type ultraviolet sterilizer |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN111943314A true CN111943314A (en) | 2020-11-17 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010890957.3A Pending CN111943314A (en) | 2020-08-29 | 2020-08-29 | Cavity type ultraviolet sterilizer |
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| Country | Link |
|---|---|
| CN (1) | CN111943314A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114229953A (en) * | 2021-12-25 | 2022-03-25 | 无锡诚源环境科技有限公司 | Cavity type ultraviolet sterilizer and ultraviolet dose calculation method thereof |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR1008785A (en) * | 1947-09-30 | 1952-05-21 | Allied Lab | Method and apparatus for irradiating liquids |
| CN102923813A (en) * | 2012-10-31 | 2013-02-13 | 章燕 | Method for sewage disposal and devices for sewage disposal |
| CN212315627U (en) * | 2020-08-29 | 2021-01-08 | 无锡诚源环境科技有限公司 | Cavity type ultraviolet sterilizer |
-
2020
- 2020-08-29 CN CN202010890957.3A patent/CN111943314A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR1008785A (en) * | 1947-09-30 | 1952-05-21 | Allied Lab | Method and apparatus for irradiating liquids |
| CN102923813A (en) * | 2012-10-31 | 2013-02-13 | 章燕 | Method for sewage disposal and devices for sewage disposal |
| CN212315627U (en) * | 2020-08-29 | 2021-01-08 | 无锡诚源环境科技有限公司 | Cavity type ultraviolet sterilizer |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114229953A (en) * | 2021-12-25 | 2022-03-25 | 无锡诚源环境科技有限公司 | Cavity type ultraviolet sterilizer and ultraviolet dose calculation method thereof |
| CN114229953B (en) * | 2021-12-25 | 2022-11-18 | 无锡诚源环境科技有限公司 | Ultraviolet dose calculation method of cavity type ultraviolet sterilizer |
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