High-temperature-resistant scale-inhibiting filter material, scale-inhibiting carbon rod and preparation method thereof

Abstract

The application provides a high-temperature-resistant scale-inhibiting filter material, a scale-inhibiting carbon rod and a preparation method thereof. The high-temperature-resistant scale-inhibiting carbon rod is prepared by using a high-melting-temperature structural adhesive as a material of a formed scale-inhibiting filter material, optimizing the selection and dosage ratio of a scale inhibitor, and using low-melting-point polyethylene as a bonding agent of an extruded carbon rod. In the production process of the extruded carbon rod, the structure of the filter material can be prevented from being damaged due to heating and high pressure, and the effect is affected. The prepared scale-inhibiting carbon rod has good slow-release effect, has good scale-inhibiting and dispersing effect on easy scale-forming substances in water, and is safe and non-toxic in use. The preparation method is simple and safe, is suitable for household water purification, and has good economic use value.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of water treatment, in particular to a high-temperature-resistant scale-inhibiting filter material, a scale-inhibiting carbon rod and a preparation method thereof. BACKGROUND

[0002] The strip-shaped scale-inhibiting filter material currently used on the market has a forming temperature of the structural adhesive selected generally at about 150-170 DEG C, so that the temperature thereof cannot generally exceed 100 DEG C during use, thereby increasing the difficulty of secondary processing and forming of the scale-inhibiting filter material with active carbon, polyethylene adhesive powder and the like. Therefore, the scale-inhibiting filter material commonly seen on the market can only be used in the sintered carbon rod which is statically heated during the processing process, and if the scale-inhibiting filter material is used in the production process of the extruded carbon rod, the structure thereof will be damaged due to the influence of heating and extrusion pressure, the slow-release effect is weakened, and the scale-inhibiting life is reduced. Moreover, since the investment cost of the equipment related to the extruded carbon rod is low and the degree of automation is much higher than that of the sintered carbon rod, the scale-inhibiting filter material is widely applied in the water purification field, and therefore it has high economic significance to develop a scale-inhibiting filter material which is suitable for the high-temperature and high-pressure formed carbon rod such as the extruded scale-inhibiting carbon rod. In view of this, the applicant specifically proposes the present application after studying the existing technology. SUMMARY

[0003] In view of the above problems, the present application aims to solve the problems described above. One object of the present application is to provide a high-temperature-resistant scale-inhibiting filter material, a scale-inhibiting carbon rod and a preparation method thereof which can avoid the damage to the structure of the filter material due to heating and high pressure during the production process of the extruded carbon rod using the filter material, and the slow-release effect of the prepared scale-inhibiting carbon rod is good, and the scale-inhibiting filter material has good scale-inhibiting and dispersing effect on the easily-scaling substances in water.

[0004] To achieve this purpose, the present application adopts the following technical solutions:

[0005] A preparation method of a high-temperature-resistant scale-inhibiting filter material, comprising the following steps:

[0006] S1, stirring and mixing organic phosphoric acid, polycarboxylic acid and citric acid uniformly at a mass ratio of 1:1:(1-5), the stirring speed is 300 rpm, and the stirring time is 5-10 min, and an organic acid solution is prepared;

[0007] S2, while stirring the ionized water, gradually adding calcium oxide, stirring for 10-30 min, after the reaction is completed, removing impurities using a high-frequency vibrating screen, and preparing a slaked lime slurry;

[0008] S3, adding the organic acid solution into the slaked lime slurry at a speed of 350-450 ml / min, and stirring at a speed of 500-1000 rpm until the PH value is stabilized at 5.5-7.5, and then centrifuging and dehydrating, and then filtering to obtain a scale inhibitor;

[0009] S4, the scale inhibitor, structural glue, lubricant and inorganic filler are put into a double planetary mixer for stirring, the stirring speed is 500-1500 rpm, the stirring time is 20-60 min, and the scale inhibitor soft material is obtained after uniform mixing;

[0010] S5, after the scale inhibitor soft material is baked at 85℃ to a moisture content of 1-5%, a rotary granulator is used for molding, the molded particles are baked in an oven for 30-60 min, and the scale inhibitor filter material is obtained after cooling.

[0011] As a further optimization, the organic phosphoric acid is one or more of POCA, HEDP, ATMP, PBTCA, EDTMP.

[0012] As a further optimization, the polycarboxylic acid is one or more of AA-AMPS, polyaspartic acid, polyepoxysuccinic acid, and hydrolyzed polymaleic anhydride.

[0013] As a further optimization, the lubricant is one or more of magnesium stearate, zinc stearate, micro-powder silica gel, calcium stearate, talc, and oxidized polyethylene wax; the structural glue is one of PVDF and PC; and the inorganic filler is one or more of activated carbon powder with a mesh size of 325-400, quartz powder, calcium carbonate, and diatomite.

[0014] As a further optimization, when the structural glue is PVDF, the temperature for baking the molded particles in step S5 is 180±20℃; and when the structural glue is PC, the temperature for baking the molded particles is 210±20℃.

[0015] As a further optimization, the mass fraction of the scale inhibitor in the scale inhibitor filter material is 40-60%, the mass fraction of the structural glue is 30-50%, the mass fraction of the lubricant is 1-5%, and the mass fraction of the inorganic filler is 1-5%.

[0016] The application also provides a high-temperature-resistant scale inhibitor filter material prepared according to the method.

[0017] The application also provides a method for preparing a scale-inhibiting carbon rod, which comprises the following steps: mixing the high-temperature-resistant scale inhibitor filter material prepared according to the method with activated carbon and a binder, and then extruding and cutting to form.

[0018] As a further optimization, the activated carbon is one or more of coconut shell activated carbon powder, nutshell activated carbon powder, wood-based activated carbon powder, bone charcoal powder, and bamboo-based activated carbon powder; and the binder is one or more of high-density polyethylene, low-density polyethylene, and linear low-density polyethylene.

[0019] The application further provides a scale-inhibiting carbon rod prepared according to the preparation method of the scale-inhibiting carbon rod.

[0020] By adopting the technical scheme, the application can achieve the following technical effects:

[0021] The high-temperature-resistant scale-inhibiting filter material, the scale-inhibiting carbon rod and the preparation method thereof provided in the application use a structural adhesive with a high melting temperature as a material for forming the scale-inhibiting filter material, and optimize the selection and dosage ratio of the scale inhibitor, so that a material suitable for the scale-inhibiting carbon rod formed by extrusion is obtained. Meanwhile, a low-melting-point polyethylene is used as a bonding agent for the extruded carbon rod to prepare a high-temperature-resistant scale-inhibiting carbon rod. In the production process of the extruded carbon rod, the structure of the filter material can be prevented from being damaged due to heating and high pressure, and the effect is affected. The scale-inhibiting carbon rod prepared has good slow-release effect, has good scale-inhibiting and dispersing effect on easily-scaling substances in water, and is safe and non-toxic in use. The preparation method is simple and safe, and is suitable for the field of household water purification, and has good economic use value. DETAILED DESCRIPTION

[0022] The high-temperature-resistant scale-inhibiting filter material, the preparation method and the scale-inhibiting carbon rod of the embodiment of the application will be described below.

[0023] The preparation method of the high-temperature-resistant scale-inhibiting filter material provided in the embodiment of the application includes the following steps.

[0024] S1, organic phosphoric acid, polycarboxylic acid and citric acid are stirred and mixed uniformly at a mass ratio of 1:1:(1-5), the stirring speed is 300 rpm, and the stirring time is 5-10 min, and an organic acid solution is prepared.

[0025] Further, in the preferred embodiment of the application, the organic phosphoric acid is one or more of POCA, HEDP, ATMP, PBTCA and EDTMP.

[0026] Further, in the preferred embodiment of the application, the polycarboxylic acid is one or more of AA-AMPS, polyaspartic acid, polyepoxysuccinic acid and hydrolyzed polymaleic anhydride.

[0027] S2, while stirring, gradually add calcium oxide, stir for 10-30 min, after the reaction is complete, use a high-frequency vibrating screen to remove unreacted impurities, and prepare a slaked lime slurry.

[0028] S3, add the organic acid solution to the slaked lime slurry at a speed of 350-450 ml / min, and stir at a speed of 500-1000 rpm, wait for the reaction to be complete, stop the reaction after the pH value is stable at 5.5-7.5, and then centrifuge and dehydrate, and then filter the excess solvent and the organic acid to obtain the scale inhibitor.

[0029] S4, the antifouling agent, structural glue, lubricant and inorganic filler are put into a double planetary mixer in proportion, stirred at a speed of 500-1500 rpm for 20-60 min, and uniformly mixed to obtain an antifouling agent soft material.

[0030] Further, in the preferred embodiment of the present application, the lubricant is one or more of magnesium stearate, zinc stearate, micronized silica gel, calcium stearate, talc, and oxidized polyethylene wax; the structural glue is one of PVDF and PC; and the inorganic filler is one or more of activated carbon powder of 325-400 mesh, quartz powder, calcium carbonate, and diatomite.

[0031] S5, the antifouling agent soft material is baked at 85°C for 60-120 min until the moisture content is 1-5%, and then formed using a rotary granulator; the formed particles are baked in an oven for 30-60 min, and then cooled to obtain an antifouling filter material.

[0032] As further optimization, when the structural glue is PVDF, the temperature for baking the formed particles is 180±20°C; and when the structural glue is PC, the temperature for baking the formed particles is 210±20°C.

[0033] As further optimization, the mass fraction of the antifouling agent in the antifouling filter material is 40-60%, the mass fraction of the structural glue is 30-50%, the mass fraction of the lubricant is 1-5%, and the mass fraction of the inorganic filler is 1-5%.

[0034] The present application also provides a high-temperature-resistant antifouling filter material prepared according to the preparation method of the high-temperature-resistant antifouling filter material. By using a structural glue with a high melting temperature as a material for forming the antifouling filter material and by optimizing the selection and dosage of the antifouling agent, a material suitable for an extrusion-formed antifouling carbon rod is obtained, which can avoid damage to the structure of the filter material and affect the effect due to heating and high pressure during the production of the extrusion carbon rod.

[0035] The present application also provides a preparation method of an antifouling carbon rod, which comprises the following steps: stirring and mixing the prepared high-temperature-resistant antifouling filter material with activated carbon and a bonding agent, and then extrusion forming and cutting.

[0036] Further, in the preferred embodiment of the present application, the mass percentage of the components in the antifouling carbon is 70-85% of activated carbon powder, 5-20% of the antifouling filter material, and 10-15% of the bonding agent.

[0037] Further, in the preferred embodiment of the present application, the particle size of the activated carbon powder is one or more of 60-140 mesh, 80-200 mesh, and 80-325 mesh.

[0038] As further optimization, the activated carbon is one or more of coconut shell activated carbon powder, nut shell activated carbon powder, wooden activated carbon powder, bone charcoal powder, and bamboo activated carbon powder; and the adhesive is one or more of high-density polyethylene, low-density polyethylene, and linear low-density polyethylene.

[0039] Further, in the preferred embodiment of the present application, the extruded scale-inhibiting carbon rod has a height of 61-263 mm, an inner diameter of 10-30 mm, and an outer diameter of 30-70 mm.

[0040] In a preferred embodiment, a double-motion stirring device is used for stirring and mixing during the preparation of the scale-inhibiting carbon rod, the stirring device has a frequency of 10-20 HZ, and the mixing time is 30-90 min.

[0041] In a preferred embodiment, the extrusion includes three temperature segments during the extrusion molding in the preparation of the scale-inhibiting carbon rod, the first segment has a temperature of 100-120℃, the second segment has a temperature of 140-150℃, and the third segment has a temperature of 130-145℃.

[0042] In a preferred embodiment, the screw rotation speed is 200-400 r / min during the extrusion molding in the preparation of the scale-inhibiting carbon rod.

[0043] The present application also provides a scale-inhibiting carbon rod prepared according to the method described above. The scale-inhibiting carbon rod prepared by using low-melting temperature polyethylene as the extruded carbon rod structure adhesive has good slow-release effect and good scale-inhibiting and dispersing effect on easily-scaling substances in water.

[0044] The features and performance of the present application are further described in detail below with reference to the following examples.

[0045] Example 1

[0046] The present example provides a high-temperature-resistant scale-inhibiting filter material prepared according to the following method:

[0047] A. Preparation of scale inhibitor:

[0048] 1) Preparation of organic acid solution: uniformly mix HEDP, PESA, and citric acid in a mass ratio of 1:1:4, stir at a speed of 500 rpm for 20 min.

[0049] 2) Preparation of lime slurry: take 10 times the mass of deionized water of calcium oxide, slowly add calcium oxide to the water while stirring, stir for 30 min, and then use a high-frequency vibrating screen to remove unreacted impurities after the reaction is complete.

[0050] 3)650rpm of rotation speed, the organic acid solution is added to the slaked lime slurry at a speed of 350ml / min, the reaction is stopped after 6h when the slurry pH value is stabilized in the range of 6.0-7.0.

[0051] 4) The excess solvent and organic acid in the reaction are filtered using a centrifugal dehydrator to obtain the desired scale inhibitor.

[0052] B. The required materials are weighed in proportion, wherein the scale inhibitor is 600g, PVDF is 370g, magnesium stearate is 30g, and diatomite is 30g. The scale inhibitor, structural adhesive PVDF, magnesium stearate, and diatomite are put into a double-planetary mixer, the stirring speed is 1200rpm, and the materials are stirred for 25min to obtain a scale inhibitor soft material.

[0053] C. The mixed scale inhibitor soft material is placed in an oven and baked at 85℃ for 90min, and the moisture is about 3%.

[0054] D. The dried material is formed by rotary granulation, the granules are baked in an oven at 180℃ for 60min, and the scale inhibitor filter material is obtained after cooling.

[0055] The embodiment also provides a scale-inhibiting carbon rod prepared according to the following method:

[0056] The coconut shell activated carbon with a particle size of 80-325 mesh, the scale-inhibiting filter material, and the high-density polyethylene are mixed by a double-motion mixer at a mass percentage of 77%, 8%, and 15% respectively, the frequency is 15HZ, and the mixing time is 30min; then the scale-inhibiting carbon rod is prepared by extrusion molding and cutting; wherein, in the process of extrusion molding, the extrusion includes three temperature sections, the first temperature section is 120℃, the second temperature section is 145℃, and the third temperature section is 120℃; meanwhile, in the process of extrusion molding, the rotation speed of the screw is 300r / min. The carbon rod is cut into a length of 192mm and a gram weight of 110g according to the specified size.

[0057] Example Two

[0058] The embodiment provides a high-temperature-resistant scale-inhibiting filter material prepared according to the following method:

[0059] A. Preparation of scale inhibitor:

[0060] 1) Preparation of organic acid solution: HEDP, PESA, and citric acid are mixed uniformly at a mass ratio of 1:1:4, the stirring speed is 500rpm, and the stirring time is 20min.

[0061] 2) Preparation of slaked lime slurry: 10 times the mass of deionized water is taken, the calcium oxide is slowly added to the water while stirring, and the stirring time is 30min. After the reaction is completed, the unreacted impurities are removed using a high-frequency vibrating screen.

[0062] 3)650rpm's speed, the organic acid solution is added into the slaked lime slurry at 350ml / min speed, the reaction is stopped after 6h when the slurry pH value is stable in the range of 6.0-7.0.

[0063] 4) using centrifugal dehydrator, the excess solvent and organic acid in the reaction is filtered to obtain the desired scale inhibitor.

[0064] B. The required materials are weighed in proportion, wherein the scale inhibitor is 600g, PC is 370g, magnesium stearate is 30g, and diatomite is 30g. The scale inhibitor, structural adhesive PC, magnesium stearate, and diatomite are put into a double planetary mixer, the stirring speed is 1200rpm, and the materials are stirred for 25min to obtain a scale inhibitor soft material.

[0065] C. The mixed scale inhibitor soft material is placed in an oven and baked at 85℃ for 90min, and the moisture is about 3%.

[0066] D. The dried material is rotary granulated and formed, the granules after forming are baked in an oven at 230℃ for 60min, and the scale inhibitor filter material is obtained after cooling.

[0067] The example also provides a scale-inhibiting carbon rod, which is prepared according to the following method:

[0068] The coconut shell activated carbon with a particle size of 80-325 mesh, the scale-inhibiting filter material, and the high-density polyethylene are mixed by a double motion mixer at a mass percentage of 77%, 8%, and 15% respectively, the frequency is 15HZ, and the mixing time is 30min; then the scale-inhibiting carbon rod is prepared by extrusion molding and cutting; wherein, in the process of extrusion molding, the extrusion includes three temperature sections, the first temperature section is 120℃, the second temperature section is 145℃, and the third temperature section is 120℃; at the same time, in the process of extrusion molding, the screw rotation speed is 300r / min. According to the specified size, the carbon rod with a length of 192mm and a gram weight of 110g is cut.

[0069] Comparative Example One

[0070] The example provides a high-temperature-resistant scale-inhibiting filter material, which is prepared according to the following method:

[0071] A. Preparation of scale inhibitor:

[0072] 1) Preparation of organic acid solution: HEDP, PESA, and citric acid are mixed in a mass ratio of 1:1:4, the stirring speed is 500rpm, and the stirring time is 20min.

[0073] 2) Configuration of slaked lime slurry: take 10 times the mass of calcium oxide of deionized water, slowly add calcium oxide to the water while stirring, stir for 30 min, after the reaction is complete, use a high-frequency vibrating screen to remove unreacted impurities.

[0074] 3) At a speed of 650 rpm, add the organic acid solution to the slaked lime slurry at a speed of 350 ml / min, after 6 h of reaction, stop the reaction when the slurry pH value stabilizes in the interval of 6.0-7.0.

[0075] 4) Use a centrifugal dehydrator to filter the excess solvent and organic acid in the reaction to obtain the desired scale inhibitor.

[0076] B. Weigh the required materials in proportion, among which the scale inhibitor is 600 g, HDPE is 370 g, magnesium stearate is 30 g, and diatomite is 30 g. Put the scale inhibitor and structural glue HDPE, magnesium stearate, and diatomite into a double-planetary mixer, stir at a speed of 1200 rpm for 25 min, and mix the materials uniformly to obtain scale inhibitor soft material.

[0077] C. Place the mixed scale inhibitor soft material in an oven and bake at 85°C for 90 min, with a moisture content of about 3%.

[0078] D. Rotate the dried material to form granules, and bake the formed granules in an oven at 160°C for 60 min, and obtain scale inhibitor filter material after cooling.

[0079] The example also provides a scale-inhibiting carbon rod, which is prepared according to the following method:

[0080] Mix coconut shell activated carbon with a particle size of 80-325 mesh, scale inhibitor filter material, and high-density polyethylene in a mass percentage of 77%, 8%, and 15% through a double-motion mixer at a frequency of 15 HZ for 30 min; then perform extrusion molding and cutting to obtain the required scale-inhibiting carbon rod; wherein, during the extrusion molding, the extrusion includes three temperature sections, the first temperature section is 120°C, the second temperature section is 145°C, and the third temperature section is 120°C; at the same time, during the extrusion molding, the screw speed is 300 r / min. Cut according to the specified size to obtain a carbon rod with a length of 192 mm and a gram weight of 110 g.

[0081] Comparative Example Two

[0082] The example provides a high-temperature-resistant scale-inhibiting filter material, which is prepared according to the following method:

[0083] E. Preparation of scale inhibitor:

[0084] 5) Preparation of organic acid solution: mix HEDP, PESA, and citric acid in a mass ratio of 1:1:4 uniformly, stir at a speed of 500 rpm for 20 min.

[0085] 6) Configuration of slaked lime slurry: take 10 times the mass of calcium oxide of deionized water, slowly add calcium oxide to the water while stirring, stir for 30 min, after the reaction is complete, use a high-frequency vibrating screen to remove unreacted impurities.

[0086] 7) At a speed of 650 rpm, add the organic acid solution to the slaked lime slurry at a speed of 350 ml / min, after 6 h of reaction, stop the reaction when the slurry pH value stabilizes in the interval of 6.0-7.0.

[0087] 8) Use a centrifugal dehydrator to filter the excess solvent and organic acid in the reaction to obtain the desired scale inhibitor.

[0088] F. Weigh the required materials in proportion, among which the scale inhibitor is 600 g, PVDF is 370 g, magnesium stearate is 30 g, and diatomite is 30 g. Put the scale inhibitor and structural glue PVDF, magnesium stearate, and diatomite into a double-planetary mixer, stir at a speed of 1200 rpm for 25 min, and mix the materials uniformly to obtain scale inhibitor soft material.

[0089] G. Place the mixed scale inhibitor soft material in an oven and bake at 85°C for 90 min, with a moisture content of about 3%.

[0090] H. Rotate the dried material to form granules, and bake the formed granules in an oven at 180°C for 60 min. After cooling, the scale inhibitor filter material is obtained.

[0091] The present embodiment also provides a scale-inhibiting carbon rod, which is prepared according to the following method:

[0092] Mix coconut activated carbon with a particle size of 80-325 mesh, scale inhibitor filter material, and ultra-high molecular weight polyethylene in a mass percentage of 65%, 8%, and 27% through a double-motion mixer at a frequency of 15 HZ for 30 min. Then, pour them into a sintering mold, and sinter them in an oven at 200°C for 100 min after pressing the mold. Cut them into carbon rods with a length of 192 mm and a gram weight of 110 g according to the specified size.

[0093] Put the four kinds of scale-inhibiting carbon rods obtained in Example 1, Example 2, Comparative Example 1, and Comparative Example 2 into a test tool, connect a 4-way pipe to the test machine, and determine the scale inhibition effect of the above scale-inhibiting carbon rods according to “GB / T 30306—2013 Household and similar purposes drinking water treatment filter cartridge”. The total hardness of the water is 450 mg / L, the test flow rate is 3 L / min, and the service life is 4000 L. The experimental results are shown in Table 1.

[0094] Table 1 Scale inhibition effect of different scale inhibitors

[0095] Antifouling carbon rod Initial 1000L 2000L 3000L 4000L Example one 98.77％ 90.95％ 95.10％ 98.14％ 97.65％ Example two 99.87％ 96.54％ 99.20％ 98.43 99.05％ Comparative example one 159.63％ 89.76％ 95.38％ 79.81％ 36.63％ Comparative example two 99.4％ 92.4％ 117.11％ 95.01％ 82.01％

[0096] As can be seen from Table 1, the full-scale scale inhibition rates of Example 1 and Example 2 obtained by the method of the application are all above 90%, indicating that the scale inhibition filter material is not structurally damaged in the secondary processing of making carbon rods, and has good slow-release effect, and has good scale inhibition and dispersion effect on calcium carbonate and other easily scaled substances in water. The test results of Comparative Example 1 are good in scale inhibition effect in the first 2000L, but the scale inhibition effect is obviously attenuated in the last 2000L. The reason for this phenomenon is that the structure glue of the scale inhibition filter material melts during the extrusion molding of the carbon rod, so that the slow-release effect of the scale inhibitor is poor, and the service life is reduced. Comparative Example 2 uses sintering molding, although the scale inhibition filter material is not under pressure in the carbon rod during sintering, but because the processing temperature of the sintering process is higher than the melting point of the structure glue of the scale inhibitor, the service life is still affected. The experiment proves that using high-melting-point structure glue can effectively improve the heat resistance and processing performance of the scale inhibition filter material, and ensure that the slow-release effect is not affected by the processing technology.

[0097] In summary, the high-temperature-resistant scale inhibition filter material, scale inhibition carbon rod and preparation method thereof provided by the application use high-melting-temperature structure glue as the material of the molded scale inhibition filter material, and optimize the selection and dosage ratio of the scale inhibitor, to obtain a material suitable for extrusion molding of the scale inhibition carbon rod. At the same time, low-melting-temperature polyethylene is used as the adhesive for extruding the carbon rod to prepare a high-temperature-resistant scale inhibition carbon rod. In the production process of the extruded carbon rod, the structure of the filter material can be prevented from being damaged due to heating and high pressure, and the effect is affected. The slow-release effect of the prepared scale inhibition carbon rod is good, and has good scale inhibition and dispersion effect on easily scaled substances in water. The material used is safe and non-toxic, the preparation method is simple and safe, and is suitable for household water purification field, and has good economic use value.

[0098] The above only describes the preferred embodiments of the application and is not intended to limit the application. Those skilled in the art can make various modifications and changes to the application. Any modification, equivalent replacement, improvement, etc. made within the spirit and principles of the application shall be included in the protection scope of the application.

Claims

1. A method for preparing a high-temperature-resistant scale-inhibiting carbon rod, characterized in that, The method comprises the following steps: S1, stirring and mixing the organic phosphoric acid, polycarboxylic acid and citric acid in a mass ratio of 1:1:(1-5) uniformly, the stirring speed is 300 rpm, and the stirring time is 5-10 min, to prepare an organic acid solution; S2, stirring the ionized water while gradually adding calcium oxide, stirring for 10-30 min, removing impurities using a high-frequency vibrating screen after the reaction is completed, and preparing a slurry of slaked lime; S3, adding the organic acid solution to the slurry of slaked lime at a speed of 350-450 ml / min, and stirring at a speed of 500-1000 rpm until the PH value is stable at 5.5-7.5, then centrifuging and dehydrating, and filtering to obtain a scale inhibitor; S4, stirring the scale inhibitor, structural glue, lubricant and inorganic filler in a double-planetary mixer, the stirring speed is 500-1500 rpm, the stirring time is 20-60 min, and the mixture is stirred uniformly to obtain a scale inhibitor soft material; S5, after the scale inhibitor soft material is baked at 85°C until the moisture content is 1-5%, the material is formed using a rotary granulator, the formed particles are baked in an oven for 30-60 min, and the scale inhibitor filter material is obtained after cooling; the scale inhibitor filter material is stirred and mixed with activated carbon and an adhesive, and then extruded and cut to form a scale inhibitor carbon rod; The structural glue is one of PVDF and PC; the inorganic filler is one or more of activated carbon powder, quartz powder, calcium carbonate and diatomite with a mesh size of 325-400; and the adhesive is one or more of high-density polyethylene, low-density polyethylene and linear low-density polyethylene.

2. The preparation method of the high-temperature-resistant scale-inhibiting carbon rod according to claim 1, characterized in that The organic phosphoric acid is one or more of POCA, HEDP, ATMP, PBTCA and EDTMP.

3. The preparation method of the high-temperature-resistant scale-inhibiting carbon rod according to claim 1, characterized in that The polycarboxylic acid is one or more of AA-AMPS, polyaspartic acid, polyepoxysuccinic acid and hydrolyzed polymaleic anhydride.

4. The preparation method of the high-temperature-resistant scale-inhibiting carbon rod according to claim 1, characterized in that The lubricant is one or more of magnesium stearate, zinc stearate, micro-powder silica gel, calcium stearate, talc and oxidized polyethylene wax.

5. The preparation method of the high-temperature-resistant scale-inhibiting carbon rod according to claim 4, characterized in that When the structural glue is PVDF, the temperature for baking the formed particles is 180±20°C; and when the structural glue is PC, the temperature for baking the formed particles is 210±20°C.

6. The preparation method of the high-temperature-resistant scale-inhibiting carbon rod according to claim 1, characterized in that The mass fraction of the scale inhibitor in the scale inhibitor filter material is 40-60%, the mass fraction of the structural glue is 30-50%, the mass fraction of the lubricant is 1-5%, and the mass fraction of the inorganic filler is 1-5%.

7. The preparation method of the high-temperature-resistant scale-inhibiting carbon rod according to claim 1, characterized in that The activated carbon is one or more of coconut shell activated carbon powder, fruit shell activated carbon powder, wood activated carbon powder, bone charcoal powder and bamboo activated carbon powder.

8. A scale inhibiting carbon rod, characterized by The scale inhibitor is prepared by the method according to any one of claims 6-7.