CN109694136B - Scale inhibition pipe and production process thereof - Google Patents
Scale inhibition pipe and production process thereof Download PDFInfo
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- CN109694136B CN109694136B CN201811654313.3A CN201811654313A CN109694136B CN 109694136 B CN109694136 B CN 109694136B CN 201811654313 A CN201811654313 A CN 201811654313A CN 109694136 B CN109694136 B CN 109694136B
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- scale
- sintering
- filter element
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- scale inhibition
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F5/00—Softening water; Preventing scale; Adding scale preventatives or scale removers to water, e.g. adding sequestering agents
- C02F5/08—Treatment of water with complexing chemicals or other solubilising agents for softening, scale prevention or scale removal, e.g. adding sequestering agents
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C67/00—Shaping techniques not covered by groups B29C39/00 - B29C65/00, B29C70/00 or B29C73/00
- B29C67/02—Moulding by agglomerating
- B29C67/04—Sintering
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F5/00—Softening water; Preventing scale; Adding scale preventatives or scale removers to water, e.g. adding sequestering agents
- C02F5/08—Treatment of water with complexing chemicals or other solubilising agents for softening, scale prevention or scale removal, e.g. adding sequestering agents
- C02F5/10—Treatment of water with complexing chemicals or other solubilising agents for softening, scale prevention or scale removal, e.g. adding sequestering agents using organic substances
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29L—INDEXING SCHEME ASSOCIATED WITH SUBCLASS B29C, RELATING TO PARTICULAR ARTICLES
- B29L2023/00—Tubular articles
Abstract
The invention provides a scale inhibition pipe and a production process thereof, wherein the production process comprises the following steps: s1, taking PP and/or PE raw materials with ultrahigh molecular weight, and sintering the PP and/or PE raw materials through semi-melting mould pressing to form the outer sleeve filter element; s2, taking PP and/or PE raw materials with ultrahigh molecular weight, and sintering the PP and/or PE raw materials through semi-melting die pressing to form an inner sleeve filter element; s3, assembling the outer sleeve filter element and the inner sleeve filter element to form a pipe body, then pouring FOF scale inhibitor between the outer sleeve filter element and the inner sleeve filter element, and forming the scale inhibition pipe through semi-melting mould pressing and sintering. The invention makes the scale inhibitor in the whole branch scale inhibition pipe more uniformly distributed, and the scale inhibition pipe has better scale inhibition effect by slowly releasing the FOF scale inhibitor and can continuously play a scale inhibition role. Meanwhile, the FOF scale inhibitor does not change the water quality after entering water, has little influence on the pH value of raw water, and is beneficial to keeping the characteristics of the raw water.
Description
Technical Field
The invention relates to the technical field of scale inhibition, in particular to a scale inhibition pipe and a production process thereof.
Background
In the field of water supply and drainage, scale is easily generated along with long-term use of pipelines. In particular, once scale is generated in the domestic water supply and drainage, the scale can cause harm to human bodies. Because the water scale is an insoluble salt, no matter the water scale is in the form of calcium carbonate and magnesium carbonate, or the water scale is in the form of calcium sulfate and magnesium sulfate, the water scale cannot be absorbed and decomposed by a human body, and the water scale is the main culprit of causing heart and kidney stones, gallstones and cardiovascular diseases. The scale not only causes great harm to human bodies, but also can damage various heat exchange and heating equipment and pipelines in industrial production, cause equipment damage or scrap, even cause the explosion of pressurized equipment such as boilers and the like, and is the most fundamental reason of energy consumption waste.
In this regard, the removal of scale is achieved in the prior art using FOF scale inhibitors. The FOF scale inhibitor is an environment-friendly product which is developed by French national science research institute and mainly comprises organic salt, and has the advantages of high-efficiency scale inhibition, environmental protection, super-strong stability and the like. The scale inhibition principle of the FOF scale inhibitor is that scale formation usually starts from the formation of tiny crystals, the crystals are separated out from a supersaturated solution, and two links of crystal nucleus formation and crystal lattice growth exist, and each link is divided into three growth periods, namely an initial period, a middle period and a final period. That is, the crystal nuclei can be gradually formed into crystal lattices after passing through these three growth periods, the growth of the crystal lattices is a slow process, the crystal lattices can be grown only by adsorbing precipitated ions on certain activated regions of the crystal nuclei, and crystals, that is, scales, are gradually formed during passing through the three growth periods. FOF in the initial stage of scale growth, namely the earliest stage of scale crystal nucleus formation, directly participates in and interferes with the formation process of scale crystal nuclei in the form of ions, so that the crystal nuclei are distorted, the formation of the crystal nuclei is hindered in the development stage, and the formation of crystals is effectively prevented. Meanwhile, the FOF scale inhibitor does not change the water quality after entering water, has little influence on the pH value of raw water, and is beneficial to keeping the characteristics of the raw water.
However, when the FOF scale inhibitor is used for removing scale at present, the FOF scale inhibitor is combined with activated carbon, so that the mixing is not uniform, and the FOF scale inhibitor attached to the surface of the activated carbon is easy to fall off to form impurities. Therefore, in view of the above problems, it is necessary to provide a further solution to avoid the generation of scale.
Disclosure of Invention
The invention aims to provide a scale inhibition pipe and a production process thereof, which aim to overcome the defects in the prior art.
In order to solve the technical problems, the technical scheme of the invention is as follows:
a production process of a scale inhibition pipe comprises the following steps:
s1, taking PP and/or PE raw materials with ultrahigh molecular weight, and sintering the PP and/or PE raw materials through semi-melting mould pressing to form the outer sleeve filter element;
s2, taking PP and/or PE raw materials with ultrahigh molecular weight, and sintering the PP and/or PE raw materials through semi-melting die pressing to form an inner sleeve filter element;
s3, assembling the outer sleeve filter element and the inner sleeve filter element to form a pipe body, then pouring FOF scale inhibitor between the outer sleeve filter element and the inner sleeve filter element to enable the whole filter element to form an equivalent FOF scale inhibitor filter layer, and forming the scale inhibition pipe through semi-melting mould pressing sintering.
As an improvement of the production process of the scale inhibition pipe of the present invention, when ultra-high molecular weight PP is used as a raw material, the process parameters of the semi-melt die pressing sintering in steps S1 to S3 are: the sintering temperature is set to be 180-220 ℃, the sintering time is 15-20 min, and the cooling time is 12-16 min.
As an improvement of the production process of the scale inhibition pipe of the present invention, when ultra-high molecular weight PP is used as a raw material, the process parameters of the semi-melt die pressing sintering in steps S1 to S3 are: the sintering temperature is set to be 185-210 ℃, the sintering time is 17min, and the cooling time is 14 min.
As an improvement of the production process of the scale inhibition pipe of the present invention, when ultra-high molecular weight PE is used as a raw material, the process parameters of the semi-melt die pressing sintering in steps S1 to S3 are: the sintering temperature is set to be 160-200 ℃, the sintering time is 10-20 min, and the cooling time is 10-14 min.
As an improvement of the production process of the scale inhibition pipe of the present invention, when ultra-high molecular weight PE is used as a raw material, the process parameters of the semi-melt die pressing sintering in steps S1 to S3 are: the sintering temperature is set to be 170-190 ℃, the sintering time is 15min, and the cooling time is 12 min.
As an improvement of the production process of the scale inhibition pipe, the PP and/or PE raw material with ultrahigh molecular weight is a powdery raw material.
As an improvement of the production process of the scale inhibition pipe, the weight percentage of the injected FOF scale inhibitor is 10%.
In order to solve the technical problems, the technical scheme of the invention is as follows:
a scale inhibition pipe obtained by the production process.
As an improvement of the scale inhibition tube, the FOF scale inhibitor packaged in the tube body is uniformly distributed in the whole tube body and is slowly released into a water body through a channel formed in the tube body.
Compared with the prior art, the invention has the beneficial effects that: the scale inhibition pipe slowly releases the FOF scale inhibitor, so that the whole filter element FOF scale inhibitor is uniformly distributed, has no short circuit phenomenon and short plates, has a good scale inhibition effect, and can continuously play a scale inhibition role. Meanwhile, the FOF scale inhibitor does not change the water quality after entering water, has little influence on the pH value of raw water, and is beneficial to keeping the characteristics of the raw water.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments described in the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.
FIG. 1 is a process flow diagram of one embodiment of the production process of the scale inhibition pipe of the present invention;
fig. 2 is a microscope image of the scale inhibition tube of the present invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
As shown in fig. 1, the invention provides a production process of a scale inhibition pipe, which comprises the following steps:
s1, taking PP and/or PE raw materials with ultra-high molecular weight, and sintering the PP and/or PE raw materials through semi-melting die pressing to form the outer sleeve filter element.
Wherein the ultra-high molecular weight PP and/or PE raw material is preferably a powdery raw material. In one embodiment, when ultra-high molecular weight PP is used as the starting material, the process parameters for semi-melt die-pressing sintering are: the sintering temperature is set to be 185-210 ℃, the sintering time is 17min, and the cooling time is 14 min.
In one embodiment, when ultra-high molecular weight PE is used as the starting material, the process parameters for semi-melt die-pressing sintering are: the sintering temperature is set to be 160-200 ℃, the sintering time is 10-20 min, and the cooling time is 10-14 min. Preferably, when ultra-high molecular weight PE is used as the raw material, the process parameters of the semi-molten die pressing sintering are: the sintering temperature is set to be 170-190 ℃, the sintering time is 15min, and the cooling time is 12 min.
S2, taking PP and/or PE raw materials with ultra-high molecular weight, and sintering the PP and/or PE raw materials through semi-melting die pressing to form the inner sleeve filter element.
Wherein the raw material in step S2 is the same as the raw material in step S1. When the semi-molten press-molding sintering is performed, the sintering temperature, the sintering time, and the cooling time are the same as those in step S1.
S3, assembling the outer sleeve filter element and the inner sleeve filter element to form a pipe body, then pouring FOF scale inhibitor between the outer sleeve filter element and the inner sleeve filter element to enable the whole filter element to form an equivalent FOF scale inhibitor filter layer, and forming the scale inhibition pipe through semi-melting mould pressing sintering.
Wherein the weight percentage of the injected FOF scale inhibitor is 10 percent.
As shown in fig. 2, the invention also provides a scale inhibition tube obtained by the production process, which comprises: the filter comprises an outer sleeve filter element and an inner sleeve filter element which is coaxially arranged with the outer sleeve filter element and forms an interlayer with the outer sleeve filter element, wherein a FOF (fluorine-containing organic compound) scale inhibitor is filled between the outer sleeve filter element and the inner sleeve filter element.
As can be seen from figure 2, due to the semi-molten die pressing and sintering process, the obtained scale inhibition pipe is dense outside and loose inside, and has uniform interlayer, and a channel for slowly releasing the FOF scale inhibitor is formed inside the scale inhibition pipe, so that the problems that the FOF scale inhibitor used in combination with the active carbon is uneven in distribution and easily falls off to form impurities are solved.
In order to verify the scale inhibition effect of the scale inhibition pipe, the FOF scale inhibitor used in combination with the carbon rod is set as a comparative example, the scale inhibition rates of the FOF scale inhibitor and the carbon rod are compared under different test conditions, and the test steps are as follows:
(1) scale inhibition rate test of FOF scale inhibitor used in combination with carbon rod
Step 1: the concentration of the prepared standard hard water is 300ppm
3 g of anhydrous calcium chloride (CaCl) is added into 10L of RO pure water in sequence2) Then 2.5 g of sodium bicarbonate (NaHCO) was added3) The mixture is added little by little while continuously stirring. Standing for 2 hr, observing whether there is crystal on the barrel wall and water surface, and if there is crystal, separating out or cloudingIf the turbidity phenomenon is used, standard water needs to be added in the preparation process.
Step 2: quantitative analysis and test for scale inhibition effect of carbon rod
The standard water was passed through a carbon rod at a flow rate of 2.5L/min, 200ml of the effluent sample was taken, and 0.1 g of sodium bicarbonate (NaHCO) was added3) Uniformly mixing a water sample, boiling, cooling, filtering by using filter paper, and testing the hardness A of filtrate of the water sample by using a water hardness tester.
Another 200ml of the solution is added with standard water, and 0.1 g of sodium bicarbonate (NaHCO) is directly added3) Mixing, boiling, cooling, filtering with filter paper, and testing the hardness B of the filtrate with standard water by a water hardness tester.
The normalized water hardness C was measured with a water hardness tester.
Scale inhibition rate = (water sample filtrate hardness A-standard water filtrate hardness B)/(standard water hardness C-standard water filtrate hardness B) X100%
Scale inhibition rate = (A-B)/(C-B) × 100%
And then the carbon rod is connected into a pipe network for water running, the carbon rod is taken out after every 1000L of water is run, the carbon rod is taken out, the test is repeated by adding standard water, and the scale inhibition rate after water running is calculated.
(2) Scale inhibition rate test of scale inhibition pipe
The test procedure is the same as the scale inhibition rate test of the FOF scale inhibitor used in combination with the carbon rod.
The test results are shown in table 1:
| initial | 1T | 2T | 3T | 4T | 5T | |
| Scale inhibition carbon rod | 29% | 27% | 26% | 24% | 21% | 18% |
| FOF | 40% | 36% | 34% | 33% | 30% | 29% |
TABLE 1
In Table 1, T represents ton. Therefore, compared with a scale inhibition carbon rod, the scale inhibition pipe has a better scale inhibition effect by slowly releasing the FOF scale inhibitor, and can continuously play a scale inhibition role.
In conclusion, the scale inhibition pipe slowly releases the FOF scale inhibitor, so that the whole filter element FOF scale inhibitor is uniformly distributed, has no short circuit phenomenon and short plates, has a good scale inhibition effect, and can continuously play a scale inhibition role. Meanwhile, the FOF scale inhibitor does not change the water quality after entering water, has little influence on the pH value of raw water, and is beneficial to keeping the characteristics of the raw water.
It will be evident to those skilled in the art that the invention is not limited to the details of the foregoing illustrative embodiments, and that the present invention may be embodied in other specific forms without departing from the spirit or essential attributes thereof. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference sign in a claim should not be construed as limiting the claim concerned.
Furthermore, it should be understood that although the present description refers to embodiments, not every embodiment may contain only a single embodiment, and such description is for clarity only, and those skilled in the art should integrate the description, and the embodiments may be combined as appropriate to form other embodiments understood by those skilled in the art.
Claims (9)
1. The production process of the scale inhibition pipe is characterized by comprising the following steps:
s1, taking PP and/or PE raw materials with ultrahigh molecular weight, and sintering the PP and/or PE raw materials through semi-melting mould pressing to form the outer sleeve filter element;
s2, taking PP and/or PE raw materials with ultrahigh molecular weight, and sintering the PP and/or PE raw materials through semi-melting die pressing to form an inner sleeve filter element;
s3, assembling the outer sleeve filter element and the inner sleeve filter element to form a pipe body, then pouring FOF scale inhibitor between the outer sleeve filter element and the inner sleeve filter element, and forming the scale inhibition pipe through semi-melting mould pressing and sintering.
2. The process for producing the scale-inhibiting pipe according to claim 1, wherein when ultra-high molecular weight PP is used as a raw material, the process parameters of the semi-molten die pressing sintering in steps S1 to S3 are as follows: the sintering temperature is set to be 180-220 ℃, the sintering time is 15-20 min, and the cooling time is 12-16 min.
3. The process for producing the scale inhibiting pipe according to claim 2, wherein when ultra-high molecular weight PP is used as a raw material, the process parameters of the semi-molten die pressing and sintering in steps S1 to S3 are as follows: the sintering temperature is set to be 185-210 ℃, the sintering time is 17min, and the cooling time is 14 min.
4. The process for producing the scale inhibiting pipe according to claim 1, wherein when ultra-high molecular weight PE is used as a raw material, the process parameters of the semi-melt die pressing sintering in steps S1 to S3 are as follows: the sintering temperature is set to be 160-200 ℃, the sintering time is 10-20 min, and the cooling time is 10-14 min.
5. The process for producing the scale inhibiting pipe according to claim 4, wherein when ultra-high molecular weight PE is used as a raw material, the process parameters of the semi-molten die pressing sintering in steps S1 to S3 are as follows: the sintering temperature is set to be 170-190 ℃, the sintering time is 15min, and the cooling time is 12 min.
6. The production process of the scale inhibiting pipe according to claim 1, wherein the ultra-high molecular weight PP and/or PE raw material is a powdery raw material.
7. The production process of the scale inhibiting pipe according to claim 1, wherein the weight percentage of the poured FOF scale inhibitor is 10%.
8. A scale inhibition pipe obtained by the production process of any one of claims 1 to 7.
9. The scale inhibiting tube of claim 8, wherein the FOF scale inhibitor encapsulated in the tube body is uniformly distributed in the whole tube body and slowly released into a water body through a channel formed inside the tube body.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
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| CN201811654313.3A CN109694136B (en) | 2018-12-29 | 2018-12-29 | Scale inhibition pipe and production process thereof |
| PCT/CN2019/119042 WO2020134697A1 (en) | 2018-12-29 | 2019-11-18 | Scale inhibiting pipe and manufacturing process therefor |
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| CN201811654313.3A CN109694136B (en) | 2018-12-29 | 2018-12-29 | Scale inhibition pipe and production process thereof |
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| CN109694136B true CN109694136B (en) | 2022-05-10 |
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| CN109694136B (en) * | 2018-12-29 | 2022-05-10 | 苏州凯虹高分子科技有限公司 | Scale inhibition pipe and production process thereof |
| CN113842708A (en) * | 2020-06-28 | 2021-12-28 | 朱晓峰 | Filter element for controlling release of scale inhibition components in water purification system and production method |
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| CN109694136A (en) | 2019-04-30 |
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