Composite activated carbon filter element, preparation method thereof, water treatment system and water purifier

Abstract

The invention discloses a composite activated carbon filter element, a preparation method thereof, a water treatment system and a water purifier. The composite activated carbon filter element comprises the following components in parts by weight: 100 parts of activated carbon and 4-8 parts of manganese dioxide. The composite activated carbon filter element provided by the invention effectively solves the problems of stink and peculiar smell of a membrane assembly, and improves the peculiar smell of the whole water purifier and produced water.

Description

Technical Field

[0001] The invention relates to a composite activated carbon filter element and a preparation method thereof, a water treatment system and a water purifier. Background Art

[0002] When the water temperature of a household nanofiltration or reverse osmosis water purifier is high in the summer, especially when the user stops the machine for more than three days, a large number of anaerobic bacteria are easily bred inside the membrane assembly. The anaerobic bacteria metabolize and decompose to produce sulfur-containing gases, causing an unacceptable odor inside the entire machine and in the water output of the machine.

[0003] At present, some water purifiers on the market use antibacterial activated carbon filters, but they can only have an antibacterial effect on the activated carbon itself, and there is no way to guarantee the state of the water, so it is impossible to avoid the membrane components behind the activated carbon filter from producing odor or stink. Summary of the invention

[0004] The technical problem solved by the present invention is to overcome the defect of the prior art water purifier membrane assembly that anaerobic bacteria are easily bred, resulting in odor inside the whole machine and the water output of the whole machine, and provide a composite activated carbon filter element and its preparation method, a water treatment system, and a water purifier. The composite activated carbon filter element of the present invention effectively solves the problem of odor and odor of the membrane assembly, and improves the odor of the whole water purifier and the water produced.

[0005] In order to achieve the above object, the present invention adopts the following technical solutions:

[0006] The invention provides a composite activated carbon filter element, which comprises the following components in parts by weight: 100 parts of activated carbon and 4 to 8 parts of manganese dioxide.

[0007] In the present invention, the activated carbon can be conventional activated carbon in the art, preferably coal-made activated carbon and / or coconut shell activated carbon, more preferably coconut shell activated carbon.

[0008] In the present invention, the iodine value of the activated carbon is preferably 800 to 1500 mg / g.

[0009] In the present invention, the ash content of the activated carbon is preferably 8 to 15 wt %.

[0010] Those skilled in the art will appreciate that the ash generally includes oxides and salts of silicon, iron, calcium, magnesium, aluminum, sodium, and potassium.

[0011] In the present invention, the strength of the activated carbon is preferably 90-98%. The strength of the activated carbon refers to the resistance of the activated carbon to crushing, also known as the wear resistance of the activated carbon, which is generally expressed as a percentage. The larger the percentage, the higher the strength, the stronger the stability, and the higher the use efficiency.

[0012] In the present invention, the water content of the activated carbon is preferably 3-8 wt %, wherein the water content of the activated carbon is the weight lost when the activated carbon is dried to a constant weight divided by the weight before drying.

[0013] In the present invention, the particle size of the activated carbon is preferably 8 to 40 meshes.

[0014] In the present invention, the manganese dioxide may be in the form of conventional manganese dioxide-containing substances in the art, preferably manganese sand.

[0015] Among them, the content of manganese dioxide in the manganese sand can be conventional in the art, preferably 30-50wt%, more preferably 35-45wt%, and further more preferably 40wt%, wherein the percentage is the mass percentage of manganese dioxide in manganese sand.

[0016] In the present invention, the weight proportion of the manganese dioxide is preferably 4 to 7 parts, more preferably 5 to 7 parts, further preferably 5.5 to 6.5 parts, for example 6 parts.

[0017] In certain preferred embodiments of the present invention, the composite activated carbon filter element comprises the following components in parts by weight: 100 parts of coconut shell activated carbon and 10 to 18 parts of manganese sand.

[0018] In a preferred embodiment of the present invention, the composite activated carbon filter element comprises the following components in parts by weight: 100 parts of coconut shell activated carbon and 15 parts of manganese sand.

[0019] In the present invention, preferably, the composite activated carbon filter element does not include a binder.

[0020] In the present invention, preferably, the composite activated carbon filter element is composed of the activated carbon and the manganese sand.

[0021] In the present invention, the weight of a single composite activated carbon filter element may be conventional in the art, preferably 100-200 g, wherein the weight of a single composite activated carbon filter element refers to the weight of the material filled in the filter element, excluding the weight of the outer wall of the container.

[0022] The present invention also provides a method for preparing the composite activated carbon filter element as described above, which comprises the following steps: the activated carbon and the manganese dioxide are mixed and freely filled to obtain the composite activated carbon filter element.

[0023] The present invention also provides a water treatment system, which comprises the composite activated carbon filter element as described above.

[0024] In the present invention, preferably, the water treatment system further comprises a nanofiltration filter element or a reverse osmosis filter element, and the nanofiltration filter element or the reverse osmosis filter element is arranged after the composite activated carbon filter element.

[0025] In the present invention, preferably, the water treatment system further comprises a post-activated carbon filter element, and the post-activated carbon filter element is arranged after the composite activated carbon filter element.

[0026] The material of the post-activated carbon filter element may be conventional activated carbon in the art, preferably coal-based activated carbon and / or coconut shell activated carbon, more preferably coconut shell activated carbon.

[0027] In a preferred embodiment of the present invention, the water treatment system comprises the composite activated carbon filter element, the nanofiltration filter element and the post-activated carbon filter element in sequence.

[0028] In another preferred embodiment of the present invention, the water treatment system comprises the composite activated carbon filter element, the reverse osmosis filter element and the post-activated carbon filter element in sequence.

[0029] Preferably, a booster pump is provided between the composite activated carbon filter element and the nanofiltration filter element, or a booster pump is provided between the composite activated carbon filter element and the reverse osmosis filter element.

[0030] In the present invention, preferably, the water treatment system further comprises an electric valve, and the electric valve is arranged before the composite activated carbon filter element.

[0031] The present invention also provides a water purifier, which comprises the composite activated carbon filter element or the water treatment system as described above.

[0032] On the basis of being in accordance with the common sense in the art, the above-mentioned preferred conditions can be arbitrarily combined to obtain the preferred embodiments of the present invention.

[0033] The reagents and raw materials used in the present invention are commercially available.

[0034] The positive and progressive effects of the present invention are as follows: the composite activated carbon filter element of the present invention adjusts the redox potential of water and avoids the growth of anaerobic bacteria in the whole machine, thereby solving the problem of odor and stink of the whole machine, and at the same time reducing the production of carcinogens such as nitrite; in addition, the filter element of the present invention has a small amount of dissolution release in water, a low turbidity increase value during soaking, and is suitable for household water purification; at the same time, the water purifier containing the activated carbon filter element of the present invention is simple to operate, cost-controllable, and has high safety, and can meet safety requirements after soaking. BRIEF DESCRIPTION OF THE DRAWINGS

[0035] Figure 1 Schematic diagram of the water treatment system of the present invention.

[0036] Reference numerals:

[0037] 1-Electric valve; 2-Composite activated carbon filter element or comparative filter element; 3-Booster pump; 4-Reverse osmosis filter element; 5-Post-activated carbon filter element; A-Water inlet; B-Purified water; C-Drainage. DETAILED DESCRIPTION

[0038] The present invention is further described below by way of examples, but the present invention is not limited to the scope of the examples. The experimental methods in the following examples without specifying specific conditions are carried out according to conventional methods and conditions, or selected according to the product specifications.

[0039] Example 1

[0040] The main raw material information used in the following examples and comparative examples of the present invention is as follows:

[0041] The coconut shell activated carbon is Jacobi Aquasorb JHS-200 activated carbon for water treatment, with an iodine value of 800-1500 mg / g, ash content of 8-15%, strength of 90-98%, moisture content of 3-8%, and a particle size of 8-40 meshes.

[0042] Manganese sand: Henan Xinfa Environmental Protection Technology Co., Ltd., density 3.6g / cm 3 , porosity 61.0~63.9%(%), particle size 8-30 mesh.

[0043] Examples 1 to 3 and Comparative Examples 1 to 2

[0044] The composition of the filter element materials of each embodiment and comparative example is shown in Table 1. Coconut shell activated carbon and manganese sand (the manganese dioxide content is 40wt%) are uniformly mixed in a conventional manner, loaded into a filter bottle for water purification, and freely filled to obtain the composite activated carbon filter elements of embodiments 1 to 3 and the filter elements of comparative examples 1 to 2. The filling amounts of the composite activated carbon filter elements of embodiments 1 to 3 and the filter elements of comparative examples 1 to 2 are both 100g.

[0045] Table 1

[0046]

[0047]

[0048] Comparative Example 3

[0049] 100 parts of coconut shell activated carbon and 15 parts of calcium peroxide are mixed uniformly in a conventional manner, loaded into a filter bottle for water purification, and freely filled. The filling amount of the filter element is 100g, and a filter element of comparative example 3 is obtained.

[0050] Effect Example

[0051] 1. Oxidation Reduction Potential (ORP) Test

[0052] The influent water passes through the composite activated carbon filter element of each embodiment or the comparative filter element at a flow rate of 3L / min to obtain the produced water; the influent water and the produced water are tested for the redox potential using a portable redox potential meter (model: Codida CT-8022 pen-type ORP meter portable redox potential measuring instrument liquid mv value detector). The specific test method is: after the probe of the ORP instrument is rinsed with the test solution 3 times, the probe is directly inserted into the test liquid to read the reading. The results are shown in Table 1. It can be seen that the ORP of the produced water passing through the composite activated carbon filter element of the present invention is not less than 20mV, which improves the redox potential of the produced water. The filter element doped with calcium peroxide in comparative example 3 can also improve the redox potential of the produced water.

[0053] 2. Test of water purifier odor

[0054] Reference Figure 1 As shown, the composite activated carbon filter element or the comparative filter element 2 of each embodiment described above, the reverse osmosis filter element 4 and the post-activated carbon filter element 5 are assembled into Figure 1 The water treatment system shown in the figure. Among them, the inlet water A enters the composite activated carbon filter element of each embodiment or the comparative filter element 2 through the electric valve 1, and enters the reverse osmosis filter element 4 through the booster pump 3 after treatment. The wastewater generated in the reverse osmosis filter element 4 is discharged as drainage C, and the water produced by the reverse osmosis filter element 4 enters the post-activated carbon filter element 5. The water produced by the post-activated carbon filter element 5 is the purified water B. The post-activated carbon filter element 5 is a coconut shell activated carbon filter element. The main component of the reverse osmosis membrane of the reverse osmosis filter element 4 is polyamide.

[0055] Assemble the water treatment system into the water purifier, power on and rinse it according to the instructions, then shut it down. Seal the water inlet and outlet of the machine with plastic wrap, and place it in a constant temperature box at 40°C. After 7 days, check whether there is any abnormality in the water output of the machine.

[0056] The results are shown in Table 1. As can be seen from Table 1, the composite activated carbon filter element of each embodiment of the present invention can effectively improve the odor and odor of the water purifier, among which the deodorizing effect of Example 2 and Example 3 is further better than that of Example 1, and the whole machine is sealed at 40°C for 7 days without odor. Comparative Examples 1 and Comparative Example 2 produce obvious odor, and Comparative Example 3 also has no obvious odor.

[0057] 3. Soaking turbidity test

[0058] The immersion turbidity increase values ​​of the composite activated carbon filter elements of the above-mentioned embodiments of the present invention and the comparative filter elements were tested. The specific testing method was based on the "Standard for Hygiene and Safety Evaluation of Drinking Water Transmission and Distribution Equipment and Protective Materials". The results showed that the filter elements of the embodiments of the present invention can effectively improve the redox potential and improve the stink and odor of the water purifier while maintaining a low immersion turbidity, especially in Examples 1 and 2, the immersion turbidity increase values ​​are very low; in Example 3, as the manganese sand content is further increased, the immersion turbidity of the filter element is improved to a certain extent; although the filter element of Comparative Example 3 can effectively improve the redox potential of the produced water and improve the stink and odor of the water purifier, its immersion turbidity exceeds the standard and cannot meet the requirements for drinking water, and is not suitable for household water purifiers.

Claims

1. A composite activated carbon filter element, It is characterized in that The invention comprises the following components in parts by weight: 100 parts of activated carbon and 4 to 8 parts of manganese dioxide.

2. The composite activated carbon filter element according to claim 1, It is characterized in that The activated carbon is coal-based activated carbon and / or coconut shell activated carbon, preferably coconut shell activated carbon; And / or, the iodine value of the activated carbon is 800 to 1500 mg / g; and / or, the ash content of the activated carbon is 8 to 15 wt%; and / or, the strength of the activated carbon is 90-98%; and / or, the water content of the activated carbon is 3-8 wt %; And / or, the particle size of the activated carbon is 8 to 40 meshes.

3. The composite activated carbon filter element according to claim 1, It is characterized in that The weight proportion of the manganese dioxide is 4 to 7 parts, preferably 5 to 7 parts, more preferably 5.5 to 6.5 parts, for example 6 parts.

4. The composite activated carbon filter element according to claim 1 or 3, It is characterized in that The composite activated carbon filter element comprises manganese sand, and the manganese sand contains manganese dioxide; Among them, the content of manganese dioxide in the manganese sand is preferably 30-50wt%, more preferably 35-45wt%, and further more preferably 40wt%, wherein the percentage is the mass percentage of manganese dioxide in the manganese sand.

5. The composite activated carbon filter element as claimed in claim 4, It is characterized in that The composite activated carbon filter element comprises the following components in parts by weight: 100 parts of coconut shell activated carbon and 10 to 20 parts of manganese sand; Alternatively, the composite activated carbon filter element comprises the following components in parts by weight: 100 parts of coconut shell activated carbon and 10 to 18 parts of manganese sand; Alternatively, the composite activated carbon filter element comprises the following components in parts by weight: 100 parts of coconut shell activated carbon and 15 parts of manganese sand.

6. The composite activated carbon filter element according to claim 4, It is characterized in that The composite activated carbon filter element does not include a binder; Alternatively, the composite activated carbon filter element is composed of the activated carbon and the manganese sand; Alternatively, the weight of a single composite activated carbon filter element is 100-200 g, wherein the weight of a single composite activated carbon filter element refers to the weight of the material filled in the filter element, excluding the weight of the outer wall of the container.

7. A method for preparing the composite activated carbon filter element according to any one of claims 1 to 6, comprising the following steps: the activated carbon and the manganese dioxide are mixed and freely filled to obtain the composite activated carbon filter element.

8. A water treatment system comprising the composite activated carbon filter element according to any one of claims 1 to 6; Preferably, the water treatment system further comprises a nanofiltration filter element or a reverse osmosis filter element, and the nanofiltration filter element or the reverse osmosis filter element is arranged after the composite activated carbon filter element; in, Preferably, a booster pump is provided between the composite activated carbon filter element and the nanofiltration filter element, or a booster pump is provided between the composite activated carbon filter element and the reverse osmosis filter element; Preferably, the water treatment system further comprises a post-activated carbon filter element, wherein the post-activated carbon filter element is arranged after the composite activated carbon filter element; Wherein, the material of the post-activated carbon filter is preferably coal-made activated carbon and / or coconut shell activated carbon, more preferably coconut shell activated carbon; Preferably, the water treatment system further comprises an electric valve, and the electric valve is arranged before the composite activated carbon filter element.

9. The water treatment system according to claim 8, It is characterized in that The water treatment system comprises the composite activated carbon filter element, the nanofiltration filter element and the post-activated carbon filter element in sequence; Alternatively, the water treatment system comprises the composite activated carbon filter element, the reverse osmosis filter element and the post-activated carbon filter element in sequence.

10. A water purifier, comprising the composite activated carbon filter element according to any one of claims 1 to 6 or the water treatment system according to claim 8 or 9.

Images