CN212269688U - Lead-removing filter element and drinking water device - Google Patents
Lead-removing filter element and drinking water device Download PDFInfo
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- CN212269688U CN212269688U CN202020485344.7U CN202020485344U CN212269688U CN 212269688 U CN212269688 U CN 212269688U CN 202020485344 U CN202020485344 U CN 202020485344U CN 212269688 U CN212269688 U CN 212269688U
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Abstract
A lead-removing filter element and a drinking water device, the lead-removing filter element comprises: the filter element shell is provided with a water inlet channel and a water outlet channel, and the part for communicating the water inlet channel with the water outlet channel also comprises an accommodating space; at least one cation exchange resin layer laid in a layered structure within the accommodation space; at least one activated carbon layer, which is laid in the accommodating space according to a layered structure; wherein the cation exchange resin layer and the activated carbon layer are laid in the accommodating space at intervals. The drinking water device comprises the lead-removing filter element. This application is through setting up cation exchange resin layer and activated carbon layer, can effectively get rid of the lead in the drinking water to the drinking water after removing lead can reach NSF drinking water safety and health standard, and, should remove lead filter core simple structure, and it is convenient to change, and the practicality is strong.
Description
Technical Field
The application belongs to the technical field of drinking water filtration, concretely relates to remove plumbous filter core and drinking water device.
Background
China is the largest lead producing and consuming country in the world. Lead is one of the heavy metals known to be most toxic and extremely toxic to accumulate. If accumulated for a long time, nerve cells and brain can be seriously damaged. Can cause hypertension, heart disease, kidney and immune system diseases, and the like. Children are extremely sensitive to this, which can cause deterioration of intelligence and hearing, and some behavioral disorders such as hyperactivity, which leads to deterioration of learning ability, incoordination between hands and eyes, etc. The use of lead-containing gasoline and paint can cause the reduction of bone density, the reduction of cognitive ability of the old, and the like. Lead pollution of drinking water is ubiquitous in China, and urban tap water delivery pipes are mostly selected from metal pipes containing lead; the chlorine used in the waterworks is taken as a sterilization disinfectant to accelerate the erosion and aging of the lead-containing water pipe; however, if people drink lead for a long time, lead is deposited in human bodies and is difficult to discharge, which causes a series of problems. The traditional sand filtration and microfiltration water treatment process has poor treatment effect on lead and cannot effectively remove lead; the reverse osmosis method has the disadvantages of troublesome use, water and electricity consumption and high cost, and the discharged concentrated solution is not easy to treat and is easy to cause secondary pollution; the precipitation method also has the problem of difficult treatment.
SUMMERY OF THE UTILITY MODEL
Aiming at the defects or shortcomings of the prior art, the technical problem to be solved by the application is to provide a lead-removing filter element and a drinking water device.
In order to solve the technical problem, the application is realized by the following technical scheme:
the application provides a lead removal filter core, include: the filter element shell is provided with a water inlet channel and a water outlet channel, and the part for communicating the water inlet channel with the water outlet channel also comprises an accommodating space;
at least one cation exchange resin layer laid in a layered structure within the accommodation space;
at least one activated carbon layer, which is laid in the accommodating space according to a layered structure;
wherein the cation exchange resin layer and the activated carbon layer are laid in the accommodating space at intervals.
Further, in the lead-removing filter element, the cation exchange resin in the cation exchange resin layer is of a short fiber structure.
Further, in the lead-removing filter element, the specific surface area of the ion exchange resin in the cation exchange resin layer is 60m or more2/g。
Further, in the lead-removing filter element, the specific surface area of the cation exchange resin in the cation exchange resin layer is 63m or more2/g。
Further, in the lead-removing filter element, the exchange capacity of the cation exchange resin layer is not less than 0.5 mmol/g.
Further, in the lead-removing filter element, the exchange capacity of the cation exchange resin layer is not less than 0.8 mmol/g.
Further, in the lead removing filter element, the mesh number of the activated carbon in the activated carbon layer is 30-50 meshes.
Further, in the lead-removing filter element, the activated carbon in the activated carbon layer is coconut shell activated carbon.
The application also provides a drinking water device, which comprises the lead-removing filter element.
Further, the drinking water device is characterized in that the lead removing filter element is detachably arranged in the shell.
Compared with the prior art, the method has the following technical effects:
by arranging the cation exchange resin layer and the activated carbon layer, lead in the drinking water can be effectively removed, and the drinking water after lead removal can reach the NSF drinking water safety and health standard; this application lays and the multilayer sets up the mode through the mutual interval on cation exchange resin layer and activated carbon layer, has further reduced the plumbous concentration of drinking water to the harm that lead caused to the human body has been reduced, and, this lead removal filter core simple structure, it is convenient to change, and the practicality is strong.
Drawings
Other features, objects and advantages of the present application will become more apparent upon reading of the following detailed description of non-limiting embodiments thereof, made with reference to the accompanying drawings in which:
FIG. 1: a cross-sectional view of a first embodiment of a lead removal cartridge of the present application;
FIG. 2: a cross-sectional view of a second embodiment of the lead removal cartridge of the present application;
FIG. 3: comparative figures for lead removal performance of cation exchange resins in this application.
Detailed Description
The conception, specific structure and technical effects of the present application will be further described in conjunction with the accompanying drawings to fully understand the purpose, characteristics and effects of the present application.
In one embodiment of the present application, as shown in fig. 1 and 2, a lead removal cartridge includes: the filter element shell 10 is provided with a water inlet channel and a water outlet channel, and the part for communicating the water inlet channel and the water outlet channel also comprises an accommodating space;
at least one cation exchange resin layer 20 laid in a layered structure within the accommodation space;
at least one activated carbon layer 30 laid in a layered structure in the accommodation space;
wherein the cation exchange resin layer 20 and the activated carbon layer 30 are laid in the receiving space with a space therebetween.
In the embodiment, the cation exchange resin layer 20 and the activated carbon are arranged at intervals, so that the concentration of lead in the drinking water can be reduced, and after the lead-removing filter element is filtered, the concentration of lead in the drinking water can reach the NSF drinking water safety and health standard.
Further, since the activated carbon layer 30 is in the form of fine particles, in this embodiment, when the drainage port of the lead removal filter element is disposed below, preferably, the cation exchange resin layer 20 is laid at a position close to the drainage port, and then the activated carbon layer 30 is laid, so that the impact force of water during the filtration process can be reduced to flush away the activated carbon. Of course, if the activated carbon layer 30 is preferably laid at a position close to the water outlet, it is considered that a structure such as a screen for intercepting activated carbon or the like is provided at the position of the water outlet, and a certain fixing function can be also performed. The specific setting mode is adjusted in the practical application process, and the disclosure of the optional mode does not limit the protection scope of the application.
Wherein the cation exchange resin in the cation exchange resin layer 20 is of a short fiber structure. Further, in this example, the cation exchange resin had a fineness of 1.2dtex and a fiber length of 38 mm.
The specific surface area of the ion exchange resin in the cation exchange resin layer 20 is more than or equal to 60m2(ii)/g, preferably, the specific surface area of the cation exchange resin in the cation exchange resin layer 20 is 63m or more2/g。
The exchange capacity of the cation exchange resin layer 20 is 0.5mmol/g or more, and preferably, the exchange capacity of the cation exchange resin layer 20 is 0.8mmol/g or more.
In the present embodiment, the cation exchange resin is mainly used for removing the lead in an ionic state.
In the present embodiment, the mesh number of the activated carbon in the activated carbon layer 30 is 30-50 mesh.
Further, the activated carbon in the activated carbon layer 30 is coconut shell activated carbon. The coconut shell activated carbon is high-quality activated carbon produced by coconut shell raw materials, is irregular granular broken carbon, has the characteristics of high strength, repeated regeneration after saturation, high adsorption capacity and low resistance, and is mainly used for removing molecular lead in water.
The present application also provides a drinking water apparatus comprising a lead removal filter as described above, wherein the lead removal filter is removably mounted within the housing. When the lead-removing filter element needs to be replaced, the lead-removing filter element can be replaced in a detachable mode, and the operation is convenient.
In this embodiment, the drinking water device includes, but is not limited to, a water filtering kettle, a coffee maker, a water purifier, and the like.
In the present embodiment, the cation exchange resin in the cation exchange resin layer 20 will be described below with specific experimental data on the high adsorption performance of heavy metals such as lead in the presence of other cations.
In this example, the cation exchange resin in the cation exchange resin layer 20 had a fineness of 1.2dtex, a fiber length of 38mm, a strength of 2.3CN/dtex, an elongation of 62%, and a specific surface area of 66m2The ion exchange capacity was 0.8mmol/g, and the amine elution amount was less than 20 ppb.
Wherein the experimental conditions are as follows: the blank, the present example, and the control (commercially available chelate fiber and commercially available ion exchange resin) were set, the reaction time was 5 hours, and the following ions were present:
130ppb lead nitrate;
magnesium sulfate heptahydrate 84 ppb;
100ppb of calcium chloride dihydrate;
166ppb sodium bicarbonate;
sodium hypochlorite 10.5 ppb.
After 5h of reaction time, the concentration of lead in the different groups is detected, and the detection result is shown in fig. 3, and it can be seen that the removal rate of lead by the cation exchange resin adopted in the example is far greater than that of the commercial chelate fiber and the commercial ion exchange resin in the control group. In the experimental data, the lead removal rate of the present example was 92.3%, the lead removal rate of the commercially available chelate fiber was 26.9%, and the lead removal rate of the commercially available ion exchange resin was 11.5%.
The lead-removing performance of the lead-removing filter element of this embodiment will be further explained by taking the concrete laying manner of the filter material layer as an example.
At pH 6.5, the lead in the water was present predominantly as ionic lead, with a total drainage volume of 318L.
1) The first laying mode of the filter material layer is as follows: a layer of cation exchange resin 20 (disposed adjacent the water outlet) is then laid over the layer of cation exchange resin 20, as shown in figure 1, as a layer of activated carbon 30.
The experimental data are shown in table 1:
TABLE 1 Experimental data sheet for lead removal using a lead removal cartridge of a first lay-out mode
As can be seen from table 1, after the lead-removing filter element of the present embodiment filters water, the lead concentration is less than 5ug/L, and less than 10ug/L, which is the maximum allowable lead concentration in the NSF standard, and when the water filtration amount is 1 to 318L, the water filtration time of the lead-removing filter element is within 15min, and the specific water filtration speed is high.
2) The filter material layer adopts a second laying mode as follows: a layer of cation exchange resin 20 (disposed adjacent to the water outlet), then a layer of activated carbon 30 is disposed on the layer of cation exchange resin 20, and then a layer of cation exchange resin 20 is disposed on the layer of activated carbon 30, as shown in fig. 2.
The experimental data are shown in table 2:
TABLE 2 Experimental data sheet for lead removal using a lead removal cartridge of the second lay mode
As can be seen from table 2, after the lead-removing filter element of the present embodiment filters water, the lead concentration is less than 5ug/L, and less than 10ug/L, which is the maximum allowable lead concentration in the NSF standard, and when the water filtration amount is 1 to 318L, the water filtration time of the lead-removing filter element is within 18min, and the specific water filtration speed is high.
In this embodiment, after lead is removed by the lead removing filter element, various indexes of effluent of the lead removing filter element are detected, and the following table 3 specifically shows:
table 3 water quality test results of experimental water at pH 6.5
As can be seen from table 3 above, at pH 6.5 and temperature 2TDS and CaCO in the drinking water at 0 deg.C3Hardness, CaCO3The alkalinity, the total free chlorine amount and the turbidity are all in the recommended data specified by the NSF detection standard, and the indexes of the drinking water such as safety, health and the like meet the NSF standard.
At pH 8.5, the lead in the water was present predominantly as ionic lead, with a total drainage volume of 318L.
1) The first laying mode of the filter material layer is as follows: a layer of cation exchange resin 20 (disposed adjacent the water outlet) is then laid over the layer of cation exchange resin 20, as shown in figure 1, as a layer of activated carbon 30.
The experimental data are shown in table 4:
TABLE 4 Experimental data sheet for lead removal using a lead removal cartridge of the first lay-out mode
As can be seen from table 4, after the lead-removing filter element of the present embodiment filters water, the lead concentration is less than 5ug/L, and less than 10ug/L, which is the maximum allowable lead concentration in the NSF standard, and when the water filtration amount is 1 to 318L, the water filtration time of the lead-removing filter element is within 18min, and the specific water filtration speed is high.
2) The filter material layer adopts a second laying mode as follows: a layer of cation exchange resin 20 (disposed adjacent to the water outlet), then a layer of activated carbon 30 is disposed on the layer of cation exchange resin 20, and then a layer of cation exchange resin 20 is disposed on the layer of activated carbon 30, as shown in fig. 2.
The experimental data are shown in table 5:
TABLE 5 Experimental data sheet for lead removal using a lead removal cartridge of the second lay mode
As can be seen from table 5, after the lead-removing filter element of the present embodiment filters water, the lead concentration is less than 5ug/L, and less than 10ug/L, which is the maximum allowable lead concentration in the NSF standard, and when the water filtration amount is 1 to 318L, the water filtration time of the lead-removing filter element is within 22min, and the specific water filtration speed is high.
In this embodiment, after lead is removed by the lead removing filter element, various indexes of effluent of the lead removing filter element are detected, and the following table 6 specifically shows:
table 6 water quality test results of experimental water at pH 8.5
As can be seen from Table 6, CaCO was contained in the drinking water at a pH of 8.5 and a temperature of 20 ℃3Hardness, CaCO3The alkalinity and the total amount of free chlorine are in the recommended data specified by the NSF detection standard, and the indexes of safety and health of the drinking water meet the NSF standard.
In summary, in this embodiment, the concentration of lead in drinking water can be reduced to 10ug/L or less by providing one cation exchange resin layer 20 and one activated carbon layer 30 in the lead removing filter element, and therefore, in view of economic cost and the like, the embodiment shown in fig. 1 is preferably used when the NSF standard is satisfied. Of course, if the initial lead concentration in the drinking water is high, the lead removal can also be carried out by alternately laying a plurality of layers.
By arranging the cation exchange resin layer 20 and the activated carbon layer 30, lead in the drinking water can be effectively removed, and the drinking water after lead removal can reach the NSF drinking water safety and health standard; this application is laid and the multilayer setting mode through cation exchange resin layer 20 and activated carbon layer 30 mutual interval, has further reduced the plumbous concentration of drinking water to the harm that lead caused to the human body has been reduced, and, this lead removal filter core simple structure, it is convenient to change, and the practicality is strong.
The above embodiments are merely to illustrate the technical solutions of the present application and are not limitative, and the present application is described in detail with reference to preferred embodiments. It will be understood by those skilled in the art that various modifications and equivalent arrangements may be made in the present invention without departing from the spirit and scope of the present invention and shall be covered by the appended claims.
Claims (10)
1. A lead removal filter cartridge, comprising:
the filter element shell is provided with a water inlet channel and a water outlet channel, and the part for communicating the water inlet channel with the water outlet channel also comprises an accommodating space;
at least one cation exchange resin layer laid in a layered structure within the accommodation space;
at least one activated carbon layer, which is laid in the accommodating space according to a layered structure;
wherein the cation exchange resin layer and the activated carbon layer are laid in the accommodating space at intervals.
2. The lead removal filter cartridge of claim 1, wherein the cation exchange resin in the cation exchange resin layer is of a short fiber construction.
3. The lead-removing filter element as claimed in claim 1, wherein the specific surface area of the ion exchange resin in the cation exchange resin layer is greater than or equal to 60m2/g。
4. The lead-removing filter element as claimed in claim 3, wherein the specific surface area of the cation exchange resin in the cation exchange resin layer is 63m or more2/g。
5. The lead-removing filter element as claimed in any one of claims 1 to 4, wherein the cation exchange resin layer has an exchange capacity of 0.5mmol/g or more.
6. The lead-removing filter element as claimed in claim 5, wherein the exchange capacity of the cation exchange resin layer is greater than or equal to 0.8 mmol/g.
7. The lead-removing filter element as claimed in any one of claims 1 to 4, wherein the mesh number of the activated carbon in the activated carbon layer is 30-50 meshes.
8. The lead-removing filter element as claimed in claim 7, wherein the activated carbon in the activated carbon layer is coconut shell activated carbon.
9. A drinking water device comprising a lead-removing filter element according to any one of claims 1 to 8.
10. The potable water apparatus of claim 9, wherein the lead removal cartridge is removably mounted within the housing.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202020485344.7U CN212269688U (en) | 2020-04-03 | 2020-04-03 | Lead-removing filter element and drinking water device |
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|---|---|---|---|
| CN202020485344.7U CN212269688U (en) | 2020-04-03 | 2020-04-03 | Lead-removing filter element and drinking water device |
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| CN212269688U true CN212269688U (en) | 2021-01-01 |
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