Boron removal system for reverse osmosis ultrapure water and water treatment equipment

Abstract

The utility model relates to the technical field of water treatment, and discloses a boron removal system for reverse osmosis ultrapure water and water treatment equipment, boron in ultrapure water can be effectively removed under the synergistic effect of a reverse osmosis membrane module, TOC removal devices and boron removal devices, meanwhile, the boron removal effect is improved by combining the two stages of boron removal devices with the two stages of TOC devices, and the service life of the water treatment equipment is prolonged. Therefore, the limit requirement of the industry on the boron content in the ultrapure water is met.

Description

Technical Field

[0001] The present application relates to the field of water treatment technology, for example, to a boron removal system and water treatment equipment for reverse osmosis ultrapure water. Background Art

[0002] At present, with the continuous development of science and technology, ultrapure water containing very few impurities, ions and organic matter is involved in various fields, and higher and higher requirements are put forward for the quality of ultrapure water. Among them, boron in ultrapure water is the only non-metallic element in the third main group of the periodic table. The valence electrons of the B atom are less than the number of valence orbits, so there is a lack of electrons. However, compared with the metal elements lithium and beryllium in the same period, boron has a smaller atomic radius, higher ionization energy, and greater electronegativity, and is characterized by the formation of covalent bond molecules. In the manufacturing system of ultrapure water, boron removal mainly depends on the reverse osmosis unit, but in the case of low pH, for example, at pH = 9, chemical cleaning will cause a significant decrease in the efficiency of deboronization. B in the form of boric acid is reverse osmosis through the reverse osmosis membrane, and its removal rate is about 80%, which is poor.

[0003] Therefore, the removal effect of boron in ultrapure water only through reverse osmosis membrane is poor and cannot meet the requirements of some industries for ultrapure water. Utility Model Content

[0004] In order to provide a basic understanding of some aspects of the disclosed embodiments, a brief summary is given below. The summary is not an extensive review, nor is it intended to identify key / critical components or delineate the scope of protection of these embodiments, but rather serves as a prelude to the detailed description that follows.

[0005] The embodiments of the present disclosure provide a boron removal system and water treatment equipment for reverse osmosis ultrapure water to improve the removal effect of boron in ultrapure water.

[0006] The embodiment of the present disclosure provides a boron removal system for reverse osmosis ultrapure water, comprising: a raw water tank; a reverse osmosis membrane module, wherein the water outlet of the raw water tank is connected to the water inlet of the reverse osmosis membrane module; a primary boron removal module, comprising a primary TOC removal device and a primary boron removal device, wherein the water outlet of the reverse osmosis membrane module is connected to the water inlet of the primary TOC removal device, and the water outlet of the primary TOC removal device is connected to the water inlet of the primary boron removal device; a secondary boron removal module, comprising a secondary TOC removal device and a secondary boron removal device, wherein the water outlet of the primary boron removal device is connected to the water inlet of the secondary TOC removal device, the water outlet of the secondary TOC removal device is connected to the water inlet of the secondary boron removal device, and the water outlet of the secondary boron removal device is connected to a water use point.

[0007] An embodiment of the present disclosure provides a water treatment device, including the above-mentioned boron removal system for reverse osmosis ultrapure water.

[0008] The boron removal system and water treatment equipment for reverse osmosis ultrapure water provided in the embodiments of the present disclosure can achieve the following technical effects:

[0009] With the synergistic effect of the reverse osmosis membrane module, TOC removal device and boron removal device, the boron in ultrapure water can be effectively removed. At the same time, the two-stage boron removal device is combined with the two-stage TOC device to improve the boron removal effect, thereby meeting the industry's restrictions on the boron content in ultrapure water.

[0010] The above general description and the following description are exemplary and explanatory only and are not intended to limit the present application. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] One or more embodiments are exemplarily described by corresponding drawings, which do not limit the embodiments. Elements with the same reference numerals in the drawings are shown as similar elements, and the drawings do not constitute a scale limitation, and wherein:

[0012] Figure 1 is a schematic structural diagram of a boron removal system for reverse osmosis ultrapure water provided in an embodiment of the present disclosure;

[0013] Figure 2 It is a schematic structural diagram of another boron removal system for reverse osmosis ultrapure water provided in an embodiment of the present disclosure.

[0014] Reference numerals:

[0015] 101: Raw water tank;

[0016] 102: reverse osmosis membrane module; 1021: primary reverse osmosis device; 1022: secondary reverse osmosis device;

[0017] 103: primary boron removal module; 1031: primary TOC removal device; 1032: primary boron removal device; 1033: EDI device; 1034: nitrogen sealed water tank;

[0018] 104: Secondary boron removal module; 1041: Secondary TOC removal device; 1042: Secondary boron removal device; 1043: Booster pump;

[0019] 105: filter module; 1051: raw water pump; 1052: mechanical filter; 1053: activated carbon filter; 1054: softening filter; 1055: precision filter;

[0020] 106: Purified water tank;

[0021] 107: back-end water treatment module; 1071: primary polishing bed; 1072: secondary polishing bed; 1073: UV device; 1074: ultrafiltration device. DETAILED DESCRIPTION

[0022] In order to be able to understand the features and technical contents of the embodiments of the present disclosure in more detail, the implementation of the embodiments of the present disclosure is described in detail below in conjunction with the accompanying drawings. The attached drawings are for reference only and are not used to limit the embodiments of the present disclosure. In the following technical description, for the convenience of explanation, a full understanding of the disclosed embodiments is provided through multiple details. However, one or more embodiments can still be implemented without these details. In other cases, to simplify the drawings, well-known structures and devices can be simplified for display.

[0023] The terms "first", "second", etc. in the specification and claims of the embodiments of the present disclosure and the above-mentioned drawings are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence. It should be understood that the terms used in this way can be interchanged where appropriate, so as to describe the embodiments of the embodiments of the present disclosure described herein. In addition, the terms "including" and "having" and any variations thereof are intended to cover non-exclusive inclusions.

[0024] In the embodiments of the present disclosure, the terms "upper", "lower", "inside", "middle", "outside", "front", "back" and the like indicate directions or positional relationships based on the directions or positional relationships shown in the accompanying drawings. These terms are mainly intended to better describe the embodiments of the present disclosure and their embodiments, and are not intended to limit the indicated devices, elements or components to have a specific direction, or to be constructed and operated in a specific direction. Moreover, in addition to being used to indicate directions or positional relationships, some of the above terms may also be used to indicate other meanings. For example, the term "upper" may also be used to indicate a certain dependency or connection relationship in certain circumstances. For those of ordinary skill in the art, the specific meanings of these terms in the embodiments of the present disclosure can be understood according to specific circumstances.

[0025] In addition, the terms "disposed", "connected", and "fixed" should be understood in a broad sense. For example, "connected" can be a fixed connection, a detachable connection, or an integral structure; it can be a mechanical connection, or an electrical connection; it can be a direct connection, or an indirect connection through an intermediate medium, or it can be an internal connection between two devices, elements, or components. For those of ordinary skill in the art, the specific meanings of the above terms in the embodiments of the present disclosure can be understood according to specific circumstances.

[0026] Unless otherwise stated, the term "plurality" means two or more.

[0027] In the embodiment of the present disclosure, the character " / " indicates that the preceding and following objects are in an "or" relationship. For example, A / B indicates: A or B.

[0028] The term "and / or" is a description of the association relationship between objects, indicating that three relationships can exist. For example, A and / or B means: A or B, or, A and B.

[0029] It should be noted that, in the absence of conflict, the embodiments and features in the embodiments of the present disclosure may be combined with each other.

[0030] Combination Figure 1 As shown, an embodiment of the present disclosure provides a boron removal system for reverse osmosis ultrapure water, comprising a raw water tank 101, a reverse osmosis membrane module 102, a primary boron removal module 103 and a secondary boron removal module 104 connected in sequence.

[0031] In some embodiments, the raw water tank 101 is used to store water to be treated.

[0032] Optionally, the water outlet of the raw water tank 101 is connected to the water inlet of the reverse osmosis membrane module 102 .

[0033] In some embodiments, the reverse osmosis membrane module 102 is used to treat the water in the raw water tank 101 by reverse osmosis technology.

[0034] Optionally, the primary boron removal module 103 includes a primary TOC (Total Organic Carbon) removal device 1031 and a primary boron removal device 1032, wherein the water outlet of the reverse osmosis membrane module 102 is connected to the water inlet of the primary TOC removal device 1031, and the water outlet of the primary TOC removal device 1031 is connected to the water inlet of the primary boron removal device 1032.

[0035] Optionally, the secondary boron removal module 104 includes a secondary TOC removal device 1041 and a secondary boron removal device 1042, wherein the water outlet of the primary boron removal device 1032 is connected to the water inlet of the secondary TOC removal device 1041, the water outlet of the secondary TOC removal device 1041 is connected to the water inlet of the secondary boron removal device 1042, and the water outlet of the secondary boron removal device 1042 is connected to a water use point.

[0036] In some embodiments, both the primary TOC removal device 1031 and the secondary TOC removal device 1041 are used to remove total organic carbon from a body of water.

[0037] In some embodiments, both the primary boron removal device 1032 and the secondary boron removal device 1042 are composed of one or more boron removal resin beds.

[0038] In some embodiments, both the primary boron removal device 1032 and the secondary boron removal device 1042 use KL (KataloxLight) filter material and CC (Catalytic Carbon) filter material as filter media.

[0039] In some embodiments, the water point includes an ultrapure water tank.

[0040] The boron removal system for reverse osmosis ultrapure water provided by the embodiment of the present disclosure can effectively remove boron in ultrapure water under the synergistic effect of the reverse osmosis membrane module, the TOC removal device and the boron removal device. At the same time, the boron removal effect is improved by combining the two-stage boron removal device with the two-stage TOC device, thereby meeting the industry's restrictions on the boron content in ultrapure water.

[0041] Combination Figure 2 As shown, an embodiment of the present disclosure provides a boron removal system for reverse osmosis ultrapure water, including a raw water tank 101, a filter module 105, a purified water tank 106, a reverse osmosis membrane module 102, a primary boron removal module 103, a secondary boron removal module 104 and a back-end water treatment module 107.

[0042] Optionally, the water outlet of the raw water tank 101 is connected to the water inlet of the filter module 105 .

[0043] Optionally, the filter module 105 is composed of one or more of a mechanical filter, an activated carbon filter, a softening filter, and a precision filter.

[0044] Optionally, the filter module 105 includes a raw water pump 1051, a mechanical filter 1052, an activated carbon filter 1053, a softening filter 1054, and a precision filter 1055 connected in sequence, wherein the water outlet of the raw water tank 101 is connected to the water inlet of the raw water pump 1051, the water outlet of the raw water pump 1051 is connected to the water inlet of the mechanical filter 1052, the water outlet of the activated carbon filter 1053 is connected to the water inlet of the softening filter 1054, and the water outlet of the softening filter 1054 is connected to the water inlet of the precision filter 1055.

[0045] In some embodiments, the mechanical filter 1052 is used to remove mechanical impurities, colloids, microorganisms, organic matter, active chlorine, etc., and its filter medium is quartz sand, activated carbon, manganese sand, anthracite, etc.

[0046] In some embodiments, the filter medium of the activated carbon filter 1053 includes black porous particles made from a variety of raw materials such as bituminous coal, lignite husks or sawdust through a carbonization and activation process. The particles have a huge specific surface area and the ability to selectively adsorb impurities rather than mechanically "filtering" impurities.

[0047] In some embodiments, the softening filter 1054 is used to absorb calcium and magnesium ions in water to reduce the hardness of the raw water.

[0048] In some embodiments, the precision filter 1055 uses tubular filter elements such as PP melt-blown, wire-sintered, pleated, titanium filter elements, activated carbon filter elements, etc. as filter elements, and selects different filter elements according to different filter media and design processes to meet the requirements of outlet water quality.

[0049] Optionally, the water outlet of the precision filter 1055 is connected to the water inlet of the purified water tank 106 .

[0050] In some embodiments, the purified water tank 106 is used to store water filtered by the filter module 105 .

[0051] Optionally, the reverse osmosis membrane module 102 includes a primary reverse osmosis device 1021 and a secondary reverse osmosis device 1022 connected in sequence, wherein the water outlet of the purified water tank 106 is connected to the water inlet of the primary reverse osmosis device 1021, and the fresh water outlet of the primary reverse osmosis device 1021 is connected to the water inlet of the secondary reverse osmosis device 1022.

[0052] Optionally, the concentrated water outlet of the primary reverse osmosis device 1021 is connected to the water inlet of the raw water tank 101 , and the concentrated water outlet of the secondary reverse osmosis device 1022 is connected to the water inlet of the purified water tank 106 .

[0053] Optionally, the first-stage boron removal module 103 includes a first-stage TOC removal device 1031, a first-stage boron removal device 1032, an EDI (Electrode Ionization) device 1033 and a nitrogen-sealed water tank 1034 connected in sequence, wherein the fresh water outlet of the second-stage reverse osmosis device 1022 is connected to the water inlet of the first-stage TOC removal device 1031, the water outlet of the first-stage TOC removal device 1031 is connected to the water inlet of the first-stage boron removal device 1032, the water outlet of the first-stage boron removal device 1032 is connected to the water inlet of the EDI device 1033, and the fresh water outlet of the EDI device 1033 is connected to the water inlet of the nitrogen-sealed water tank 1034.

[0054] Optionally, the concentrated water outlet of the EDI device 1033 is connected to the water inlet of the purified water tank 106 .

[0055] Optionally, the water inlet of the nitrogen-sealed water tank 1034 is also connected to a water point, wherein the water point is used to return unused water to the nitrogen-sealed water tank 1034 .

[0056] In some embodiments, the EDI device 1033 is used to purify clean water and convert pure water into ultrapure water.

[0057] In some embodiments, the nitrogen-sealed water tank 1034 is used to supply produced pure water into the nitrogen-sealed water tank 1034 through a water injection pipe, and the liquid surface in the nitrogen-sealed water tank is nitrogen-sealed by nitrogen to ensure the quality of pure water; the nitrogen replenishment valve can be connected to an external nitrogen supply device to replenish nitrogen, and the nitrogen release valve is used to discharge excess nitrogen in the nitrogen-sealed water tank into a specific container.

[0058] Optionally, the secondary boron removal module 104 includes a booster pump 1043, a secondary TOC removal device 1041 and a secondary boron removal device 1042 connected in sequence, wherein the water outlet of the nitrogen-sealed water tank 1034 is connected to the water inlet of the booster pump 1043, the water outlet of the booster pump 1043 is connected to the water inlet of the secondary TOC removal device 1041, and the water outlet of the secondary TOC removal device 1041 is connected to the water inlet of the secondary boron removal device 1042.

[0059] Optionally, the back-end water treatment module 107 includes a primary polishing bed 1071, a secondary polishing bed 1072, a UV (Ultraviolet Disinfection) device 1073, and an ultrafiltration device 1074, which are connected in sequence, wherein the water outlet of the secondary boron removal device 1042 is connected to the water inlet of the primary polishing bed 1071, the water outlet of the primary polishing bed 1071 is connected to the water inlet of the secondary polishing bed 1072, the water outlet of the secondary polishing bed 1072 is connected to the water inlet of the UV device 1073, the water outlet of the UV device 1073 is connected to the water inlet of the ultrafiltration device 1074, and the water outlet of the ultrafiltration device 1074 is connected to a water use point.

[0060] In some embodiments, the primary polishing bed 1071 and the secondary polishing bed 1072 are used as mixed polishing beds, both for mixing anions and cations in the same exchange container, and achieving effective adsorption of water molecules through a multi-level staggered arrangement.

[0061] In some embodiments, UV device 1073 is used to utilize ultraviolet rays of appropriate wavelengths to destroy the molecular structure of DNA (deoxyribonucleic acid) or RNA (ribonucleic acid) in the cells of microorganisms, causing growth cell death and / or regenerative cell death, thereby achieving a sterilization effect.

[0062] In some embodiments, the ultrafiltration device 1074 allows small molecular solutes and solvents to pass through a special membrane with a certain pore size under a certain pressure, while preventing large molecular solutes from passing through and remaining on one side of the membrane, thereby partially purifying the large molecular substances.

[0063] The boron removal system for reverse osmosis ultrapure water provided by the embodiment of the present disclosure can effectively remove boron in ultrapure water under the synergistic effect of the reverse osmosis membrane module, the TOC removal device and the boron removal device. At the same time, the boron removal effect is improved by combining the two-stage boron removal device with the two-stage TOC device, thereby meeting the industry's restrictions on the boron content in ultrapure water.

[0064] An embodiment of the present disclosure provides a water treatment device, including the above-mentioned boron removal system for reverse osmosis ultrapure water.

[0065] The above description and the accompanying drawings sufficiently illustrate the embodiments of the present disclosure to enable those skilled in the art to practice them. Other embodiments may include structural and other changes. The embodiments represent only possible variations. Unless explicitly required, individual components and functions are optional, and the order of operations may vary. Portions and features of some embodiments may be included in or replace portions and features of other embodiments. The embodiments of the present disclosure are not limited to the structures described above and shown in the accompanying drawings, and various modifications and changes may be made without departing from the scope thereof. The scope of the present disclosure is limited only by the appended claims.

Claims

1. A boron removal system for reverse osmosis ultrapure water, characterized in that: include: Raw water tank; A reverse osmosis membrane module, wherein the water outlet of the raw water tank is connected to the water inlet of the reverse osmosis membrane module; A primary boron removal module, comprising a primary TOC removal device and a primary boron removal device, wherein the water outlet of the reverse osmosis membrane module is connected to the water inlet of the primary TOC removal device, and the water outlet of the primary TOC removal device is connected to the water inlet of the primary boron removal device; The secondary boron removal module comprises a secondary TOC removal device and a secondary boron removal device, wherein the water outlet of the primary boron removal device is connected to the water inlet of the secondary TOC removal device, the water outlet of the secondary TOC removal device is connected to the water inlet of the secondary boron removal device, and the water outlet of the secondary boron removal device is connected to a water use point.

2. The system according to claim 1, characterized in that The reverse osmosis membrane module comprises a primary reverse osmosis device and a secondary reverse osmosis device connected in sequence, wherein the fresh water outlet of the primary reverse osmosis device is connected to the water inlet of the secondary reverse osmosis device, and the fresh water outlet of the secondary reverse osmosis device is connected to the water inlet of the primary TOC removal device.

3. The system according to claim 2, characterized in that The first-level boron removal device also includes an EDI device and a nitrogen-sealed water tank. The water outlet of the first-level boron removal device is connected to the water inlet of the second-level TOC removal device through the EDI device and the nitrogen-sealed water tank in sequence, wherein the water outlet of the first-level boron removal device is connected to the water inlet of the EDI device, the fresh water outlet of the EDI device is connected to the water inlet of the nitrogen-sealed water tank, and the water outlet of the nitrogen-sealed water tank is connected to the water inlet of the second-level TOC removal device.

4. The system according to claim 3, characterized in that The water inlet of the nitrogen-sealed water tank is also connected to the water use point, and the water use point is used to return unused water to the nitrogen-sealed water tank.

5. The system according to claim 3, characterized in that The secondary boron removal module also includes a booster pump, wherein the booster pump is arranged between the water outlet of the primary boron removal device and the water inlet of the secondary TOC removal device.

6. The system according to claim 5, characterized in that The system also includes a filter module, and the water outlet of the raw water tank is connected to the water inlet of the reverse osmosis membrane module through the filter module, wherein the filter module includes one or more of a mechanical filter, an activated carbon filter, a softening filter, and a precision filter.

7. The system according to claim 6, characterized in that The filter module includes a raw water pump, a mechanical filter, an activated carbon filter, a softening filter, and a precision filter which are connected in sequence.

8. The system according to claim 6, characterized in that The system further comprises a purified water tank, through which the filter module is connected to the reverse osmosis membrane module, wherein the water inlet of the purified water tank is also connected to the concentrated water outlet of the EDI device and the concentrated water outlet of the secondary reverse osmosis device.

9. The system according to any one of claims 1 to 8, characterized in that: The system also includes a back-end water treatment module, and the water outlet of the secondary boron removal device is connected to the water use point through the back-end water treatment module, wherein the back-end water treatment module includes a primary polishing bed, a secondary polishing bed, a UV device, and an ultrafiltration device connected in sequence.

10. A water treatment device, characterized in that: The boron removal system for reverse osmosis ultrapure water comprises the system as claimed in any one of claims 1 to 9.

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