CN114982778A - Preparation process of compound calcium hypochlorite cake agent for long-acting slow-release disinfection water body and slow-release performance testing method - Google Patents
Preparation process of compound calcium hypochlorite cake agent for long-acting slow-release disinfection water body and slow-release performance testing method Download PDFInfo
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- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims abstract description 110
- 239000003795 chemical substances by application Substances 0.000 title claims abstract description 81
- -1 compound calcium hypochlorite Chemical class 0.000 title claims abstract description 75
- 238000004659 sterilization and disinfection Methods 0.000 title claims abstract description 33
- 238000002360 preparation method Methods 0.000 title claims abstract description 22
- 238000012360 testing method Methods 0.000 title claims description 35
- 238000000034 method Methods 0.000 claims abstract description 67
- 238000013268 sustained release Methods 0.000 claims abstract description 23
- 239000012730 sustained-release form Substances 0.000 claims abstract description 23
- 238000011056 performance test Methods 0.000 claims abstract description 19
- ZKQDCIXGCQPQNV-UHFFFAOYSA-N Calcium hypochlorite Chemical compound [Ca+2].Cl[O-].Cl[O-] ZKQDCIXGCQPQNV-UHFFFAOYSA-N 0.000 claims description 71
- 239000002994 raw material Substances 0.000 claims description 52
- 239000011734 sodium Substances 0.000 claims description 29
- 229910052708 sodium Inorganic materials 0.000 claims description 29
- 239000002245 particle Substances 0.000 claims description 28
- 239000000463 material Substances 0.000 claims description 19
- OYPRJOBELJOOCE-UHFFFAOYSA-N Calcium Chemical compound [Ca] OYPRJOBELJOOCE-UHFFFAOYSA-N 0.000 claims description 16
- DGAQECJNVWCQMB-PUAWFVPOSA-M Ilexoside XXIX Chemical compound C[C@@H]1CC[C@@]2(CC[C@@]3(C(=CC[C@H]4[C@]3(CC[C@@H]5[C@@]4(CC[C@@H](C5(C)C)OS(=O)(=O)[O-])C)C)[C@@H]2[C@]1(C)O)C)C(=O)O[C@H]6[C@@H]([C@H]([C@@H]([C@H](O6)CO)O)O)O.[Na+] DGAQECJNVWCQMB-PUAWFVPOSA-M 0.000 claims description 16
- 239000011575 calcium Substances 0.000 claims description 16
- 229910052791 calcium Inorganic materials 0.000 claims description 16
- 239000008187 granular material Substances 0.000 claims description 13
- 239000000843 powder Substances 0.000 claims description 11
- 230000008859 change Effects 0.000 claims description 10
- 238000005303 weighing Methods 0.000 claims description 10
- 238000002156 mixing Methods 0.000 claims description 8
- 238000003825 pressing Methods 0.000 claims description 7
- 230000002706 hydrostatic effect Effects 0.000 claims description 6
- 230000003068 static effect Effects 0.000 claims description 4
- 238000004519 manufacturing process Methods 0.000 claims 3
- 239000003826 tablet Substances 0.000 description 22
- ZAMOUSCENKQFHK-UHFFFAOYSA-N Chlorine atom Chemical compound [Cl] ZAMOUSCENKQFHK-UHFFFAOYSA-N 0.000 description 13
- 239000000460 chlorine Substances 0.000 description 13
- 229910052801 chlorine Inorganic materials 0.000 description 13
- 238000002474 experimental method Methods 0.000 description 13
- 238000004090 dissolution Methods 0.000 description 9
- 230000008569 process Effects 0.000 description 9
- 239000007939 sustained release tablet Substances 0.000 description 6
- 230000001954 sterilising effect Effects 0.000 description 5
- 239000013585 weight reducing agent Substances 0.000 description 5
- 239000003651 drinking water Substances 0.000 description 4
- 235000020188 drinking water Nutrition 0.000 description 4
- 239000000203 mixture Substances 0.000 description 4
- AXCZMVOFGPJBDE-UHFFFAOYSA-L calcium dihydroxide Chemical compound [OH-].[OH-].[Ca+2] AXCZMVOFGPJBDE-UHFFFAOYSA-L 0.000 description 3
- 229910001861 calcium hydroxide Inorganic materials 0.000 description 3
- 239000000920 calcium hydroxide Substances 0.000 description 3
- 241000196324 Embryophyta Species 0.000 description 2
- 230000032683 aging Effects 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 230000003203 everyday effect Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000003756 stirring Methods 0.000 description 2
- 230000002459 sustained effect Effects 0.000 description 2
- 241000234282 Allium Species 0.000 description 1
- 235000002732 Allium cepa var. cepa Nutrition 0.000 description 1
- VEXZGXHMUGYJMC-UHFFFAOYSA-M Chloride anion Chemical compound [Cl-] VEXZGXHMUGYJMC-UHFFFAOYSA-M 0.000 description 1
- 239000004677 Nylon Substances 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 239000000645 desinfectant Substances 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 239000003814 drug Substances 0.000 description 1
- 239000000428 dust Substances 0.000 description 1
- 150000002484 inorganic compounds Chemical class 0.000 description 1
- 229910010272 inorganic material Inorganic materials 0.000 description 1
- 229920001778 nylon Polymers 0.000 description 1
- 229930000044 secondary metabolite Natural products 0.000 description 1
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- A—HUMAN NECESSITIES
- A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
- A01N—PRESERVATION OF BODIES OF HUMANS OR ANIMALS OR PLANTS OR PARTS THEREOF; BIOCIDES, e.g. AS DISINFECTANTS, AS PESTICIDES OR AS HERBICIDES; PEST REPELLANTS OR ATTRACTANTS; PLANT GROWTH REGULATORS
- A01N59/00—Biocides, pest repellants or attractants, or plant growth regulators containing elements or inorganic compounds
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- A—HUMAN NECESSITIES
- A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
- A01N—PRESERVATION OF BODIES OF HUMANS OR ANIMALS OR PLANTS OR PARTS THEREOF; BIOCIDES, e.g. AS DISINFECTANTS, AS PESTICIDES OR AS HERBICIDES; PEST REPELLANTS OR ATTRACTANTS; PLANT GROWTH REGULATORS
- A01N25/00—Biocides, pest repellants or attractants, or plant growth regulators, characterised by their forms, or by their non-active ingredients or by their methods of application, e.g. seed treatment or sequential application; Substances for reducing the noxious effect of the active ingredients to organisms other than pests
- A01N25/34—Shaped forms, e.g. sheets, not provided for in any other sub-group of this main group
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N5/00—Analysing materials by weighing, e.g. weighing small particles separated from a gas or liquid
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- Zoology (AREA)
- Engineering & Computer Science (AREA)
- Plant Pathology (AREA)
- Agronomy & Crop Science (AREA)
- Pest Control & Pesticides (AREA)
- Inorganic Chemistry (AREA)
- Pathology (AREA)
- Immunology (AREA)
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Abstract
The invention discloses a preparation process and a sustained-release performance test method of a compound calcium hypochlorite cake agent for long-acting sustained-release disinfection of water bodies.
Description
Technical Field
The invention relates to the technical field of preparation of a calcium hypochlorite cake agent and slow release performance testing, in particular to a preparation process of a compound calcium hypochlorite cake agent for a long-acting slow release disinfection water body and a slow release performance testing method.
Background
Calcium hypochlorite is generally used as a sterilization disinfectant of a water plant, the calcium hypochlorite is an inorganic compound, and is used as a safe and efficient drinking water sterilization agent without generating harmful secondary compounds, so that how to safely and effectively sterilize drinking water of villages and towns is a civil problem, a part of drinking water far away from villages and towns is in mountainous areas, a calcium hypochlorite cake agent is used for sterilizing the drinking water, the diameter of the cake agent is 6.75 centimeters or 7.6 centimeters, the thickness of the cake agent is about 2-3 centimeters, workers of the water plant of the villages and towns need to reach a reservoir or a sterilization well on the top of the mountains every day, 5-10 calcium hypochlorite cake agents are bound by a net bag or a nylon rope and are sunk into water for slow-release sterilization, then the residual chlorine content is detected at a downstream water outlet, and the calcium hypochlorite powder mixture pressing and the sodium process particle pressing are mainly used for the calcium hypochlorite powder mixture pressing;
wherein, the effective chlorine content of the cake agent pressed by the calcium hypochlorite powder particle mixture in the calcium method process is about 60 percent, the main problems are that the residual chlorine content and the dissolution time are unstable, when the pressure of the cake agent pressed by a tablet press is small, the calcium hypochlorite cake is crisp, the gaps in the cake are more, the dissolution is too fast, and the dissolution can be completed in 10 hours, and when the pressure of the cake agent pressed by the tablet press is large, the dissolution time of the calcium hypochlorite cake is too slow, which shows that the cake agent is like onion to peel off layer by layer in the dissolution process, because the calcium hydroxide concentration is too high and is not easy to dissolve, the calcium hydroxide is deposited on the surface of the cake agent, the contact between the medicine and the water is reduced, sometimes the cake agent is difficult to melt in 3 days to 7 days, so the dissolution time of the cake agent prepared by the calcium method process is unstable, and the residual tablet dissolved by the cake agent is only insoluble calcium hydroxide cluster, no chlorine ion is released, the residual chlorine content in the downstream test is too high in the first day, the residual chlorine content is too low or almost zero after two days;
the effective chlorine content of the calcium hypochlorite cake agent of the sodium method process is about 65 percent, and the main problems are that the dissolution time is too fast, the dissolution time is about 24 hours in winter, the dissolution time is about 12 hours in summer, workers need to put the calcium hypochlorite cake agent every day or even every half day, the workload is heavy, the cake agent is too fast to dissolve, and whether the downstream residual chlorine content is too high or not needs to be noticed, so that ecological accidents are caused, or the water body cannot be disinfected due to too low content;
therefore, in order to overcome the problems of the calcium hypochlorite cake agent prepared by the existing calcium method process and the sodium method process, the invention provides a preparation process and a slow release performance test method of a compound calcium hypochlorite cake agent for long-acting slow release disinfection of water body, so as to solve the problems.
Disclosure of Invention
The invention aims to overcome the problems of the calcium hypochlorite cakes prepared by the existing calcium method process and the sodium method process. According to the preparation process and the sustained-release performance test method of the compound calcium hypochlorite cake agent for the long-acting sustained-release disinfection water body, the compound calcium chlorate cake agent can be sustained and released for a long time and has good linear sustained and sustained release performance, and the residual chlorine after water body disinfection is released stably, so that the compound calcium hypochlorite cake agent has a good application prospect.
In order to achieve the purpose, the invention adopts the technical scheme that:
a preparation process of a compound calcium hypochlorite cake agent for long-acting slow-release disinfection of water bodies comprises the following steps:
step (A1), weighing the powder particle mixed calcium hypochlorite raw material prepared by the calcium method for later use;
step (B1), weighing the granular calcium hypochlorite raw material prepared by the sodium method for later use;
step (C1), uniformly mixing the powder-particle mixed calcium hypochlorite raw material prepared by the calcium method and the granular calcium hypochlorite raw material prepared by the sodium method according to a certain proportion to prepare a mixed material;
and (D1) pressing the mixed material into a cake to obtain the compound calcium hypochlorite cake agent.
In the preparation process of the compound calcium hypochlorite cake agent for the long-acting slow-release disinfection water body, the particle diameter of the particle mixed calcium hypochlorite raw material in the step (A1) is less than 6 meshes.
In the preparation process of the compound calcium hypochlorite cake agent for the long-acting slow-release disinfection water body, the particle diameter of the granular calcium hypochlorite raw material in the step (B1) is 12-28 meshes.
In the step (C1), the powder-mixed calcium hypochlorite raw material prepared by the calcium method and the granular calcium hypochlorite raw material prepared by the sodium method are uniformly mixed according to a certain proportion, and the proportion of the powder-mixed calcium hypochlorite raw material to the granular calcium hypochlorite raw material is 7:3, 6:4, 4:6 and 3: 7.
In the preparation process of the compound calcium hypochlorite cake agent for the long-acting slow-release disinfection water body, in the step (D1), the mixed material is pressed into a cake sheet, the mixed material is pressed by a basket tablet press, and the pressure value of the basket tablet press is 300 kn.
A slow release performance test method of a compound calcium hypochlorite cake agent for a long-acting slow release disinfection water body comprises a static water slow release performance test and a dynamic water slow release performance test of the compound calcium hypochlorite cake agent;
the test of the hydrostatic sustained-release performance of the compound calcium hypochlorite cake agent comprises the following steps:
preparing materials, namely preparing corresponding compound calcium hypochlorite cakes as experimental groups according to the preparation process of the compound calcium hypochlorite cakes by respectively preparing the powder-particle mixed calcium hypochlorite raw materials and the granular calcium hypochlorite raw materials according to the ratio of 7:3, 6:4, 4:6 and 3:7, and taking the calcium hypochlorite tablets prepared by full-sodium method granules as a control group;
and (B2) placing the compound calcium hypochlorite cakes prepared in different proportions and the calcium hypochlorite tablets prepared by full-sodium method granules into still water for slow release, wherein the conditions of the still water test are as follows: the water temperature is constant, and the air temperature is maintained within a certain range;
step (C2), recording the gram weight of the experimental group and the control group in still water at intervals;
step (D2), obtaining the slow release performance of the compound calcium hypochlorite cake agent prepared in different proportions according to the recorded gram weight change;
the testing of the flowing water slow-release performance of the compound calcium hypochlorite cake agent comprises the following steps:
preparing materials, namely preparing corresponding compound calcium hypochlorite cakes as experimental groups according to the preparation process of the compound calcium hypochlorite cakes by respectively preparing the powder-particle mixed calcium hypochlorite raw materials and the granular calcium hypochlorite raw materials according to the ratio of 7:3, 6:4, 4:6 and 3:7, and taking the calcium hypochlorite tablets prepared by full-sodium method granules as a control group;
step (B3), compound calcium hypochlorite cakes prepared according to different proportions and calcium hypochlorite tablets prepared by full-sodium method granules are placed in flowing water for slow release, and the conditions of the flowing water test are as follows: the flowing water flow rate is constant, the water temperature is constant, and the air temperature is maintained within a certain range;
step (C3), recording the gram weight of the experimental group and the control group in the running water at intervals;
and (D3) obtaining the slow release performance of the compound calcium hypochlorite cakes prepared in different proportions according to the recorded gram weight change.
The slow release performance test method of the compound calcium hypochlorite cake agent for the long-acting slow release disinfection water body comprises the following static water test conditions in the step (B2): the water temperature is 17 ℃, and the air temperature is maintained at 18-27 ℃.
The slow release performance test method of the compound calcium hypochlorite cake agent for the long-acting slow release disinfection water body comprises the following conditions of the running water test in the step (B3): the flowing water flow rate is 8m/min, the water temperature is 15 ℃, and the air temperature is maintained at 18-22 ℃.
According to the method for testing the slow release performance of the compound calcium hypochlorite cake agent for the long-acting slow release disinfection water body, the recording interval time in the step (C2) and the step (C3) is 4 hours.
The invention has the beneficial effects that: according to the invention, the powder particles prepared by a certain proportion of the compound calcium method are mixed with the calcium hypochlorite raw material and the granular calcium hypochlorite raw material prepared by a sodium method, and then the mixture is pressed into a cake agent to prepare the compound calcium hypochlorite cake agent.
Drawings
FIG. 1 is a flow chart of a preparation process of the compound calcium hypochlorite cake agent of the invention;
FIG. 2 is a graph of gram weight recording changes in a hydrostatic sustained release performance test experiment of the present invention;
FIG. 3 is a diagram showing the slow release effect of 70 tablets of still water in a test of slow release performance of still water according to the present invention;
FIG. 4 is a graph of the change of gram weight record of the dynamic water sustained-release performance test experiment of the invention.
Detailed Description
The invention will be further described with reference to the accompanying drawings.
As shown in figure 1, the preparation process of the compound calcium hypochlorite cake agent for the long-acting slow-release disinfection water body of the invention comprises the following steps:
step (A1), weighing powder particle mixed calcium hypochlorite raw material prepared by a calcium method for later use;
step (B1), weighing the granular calcium hypochlorite raw material prepared by the sodium method for later use;
the particle diameter of the particle mixed calcium hypochlorite raw material in the step (A1) is less than 6 meshes, the particle diameter of the particle mixed calcium hypochlorite raw material in the step (B1) is 12-28 meshes, and the smaller particle diameter can be repeatedly contacted with water, so that the slow release performance of the cake agent can be improved;
step (C1), uniformly mixing the powder particle mixed calcium hypochlorite raw material prepared by the calcium method and the granular calcium hypochlorite raw material prepared by the sodium method according to a certain proportion to prepare a mixed material, and mixing and stirring the mixed material by a vertical stirrer or a waist drum type stirrer at the stirring speed of 30r/min to avoid dust;
step (C1) is to mix the powder particle mixed calcium hypochlorite raw material prepared by the calcium method and the granular calcium hypochlorite raw material prepared by the sodium method evenly according to a certain proportion, the proportion of the powder particle mixed calcium hypochlorite raw material and the granular calcium hypochlorite raw material is 7:3, 6:4, 4:6 and 3:7, the preferential proportion is 7:3, when the concrete implementation, weighing 35KG of calcium raw materials and 15KG of sodium raw materials, mixing, preparing 160g of compound calcium hypochlorite cake agent in batches by a tablet press, weighing 30KG of calcium-method raw materials and 20KG of sodium-method raw materials according to the ratio of 6:4, mixing to prepare 170g of cake, weighing 20KG of calcium raw material and 30KG of sodium raw material according to the ratio of 4:6, mixing to prepare 180g of cake, weighing 15KG of calcium-method raw materials and 35KG of sodium-method raw materials according to the proportion of 3:7, and mixing to prepare 190g of cake agent;
step (D1), pressing the mixed material into a cake to prepare a compound calcium hypochlorite cake agent;
and (D1) pressing the mixed material into a cake sheet, wherein the mixed material is pressed by a basket tablet press, and the pressure value of the basket tablet press is 300 kn.
The invention relates to a method for testing slow release performance of a compound calcium hypochlorite cake agent of a long-acting slow release disinfection water body, which comprises the steps of testing the static water slow release performance and the dynamic water slow release performance of the compound calcium hypochlorite cake agent;
the test of the hydrostatic sustained-release performance of the compound calcium hypochlorite cake agent comprises the following steps:
preparing materials, namely preparing corresponding compound calcium hypochlorite cakes as experimental groups according to the preparation process of the compound calcium hypochlorite cakes by respectively preparing a powder-mixed calcium hypochlorite raw material and a granular calcium hypochlorite raw material according to the ratio of 7:3, 6:4, 4:6 and 3:7, and taking calcium hypochlorite tablets prepared by full-sodium method granules as a control group;
and (B2) placing the compound calcium hypochlorite cakes prepared in different proportions and the calcium hypochlorite tablets prepared by full-sodium method granules into still water for slow release, wherein the conditions of the still water test are as follows: the water temperature is constant, and the air temperature is maintained within a certain range;
the conditions for the hydrostatic test in step (B2) were: the water temperature is 17 ℃, and the air temperature is maintained at 18-27 ℃;
step (C2), recording the gram weight of the experimental group and the control group in still water at intervals;
step (D2), obtaining the slow release performance of the compound calcium hypochlorite cake agent prepared in different proportions according to the recorded gram weight change;
the testing of the flowing water slow-release performance of the compound calcium hypochlorite cake agent comprises the following steps:
preparing materials, namely preparing corresponding compound calcium hypochlorite cakes as experimental groups according to the preparation process of the compound calcium hypochlorite cakes by respectively preparing a powder-mixed calcium hypochlorite raw material and a granular calcium hypochlorite raw material according to the ratio of 7:3, 6:4, 4:6 and 3:7, and taking calcium hypochlorite tablets prepared by full-sodium method granules as a control group;
and (B3) placing the compound calcium hypochlorite cake agent prepared in different proportions and the calcium hypochlorite tablet prepared by full-sodium method granules into flowing water for slow release, wherein the conditions of the flowing water test are as follows: the flowing water flow rate is constant, the water temperature is constant, and the air temperature is maintained within a certain range;
the conditions of the running water test in the step (B3) are as follows: the flowing water flow rate is 8m/min, the water temperature is 15 ℃, and the air temperature is maintained at 18-22 ℃;
step (C3), recording the gram weight of the experimental group and the control group in the running water at intervals;
step (D3), obtaining the slow release performance of the compound calcium hypochlorite cake agent prepared in different proportions according to the recorded gram weight change;
the recording interval time in the step (C2) and the step (C3) is 4 h.
According to the slow release performance test method of the compound calcium hypochlorite cake agent for the long-acting slow release disinfection water body, the slow release performance test experiment of the compound calcium hypochlorite cake agent is as follows:
in the experiment, 70 pieces of the compound calcium hypochlorite cake prepared according to the proportion of 7:3, 60 pieces of the compound calcium hypochlorite cake prepared according to the proportion of 6:4, 40 pieces of the compound calcium hypochlorite cake prepared according to the proportion of 4:6, 30 pieces of the compound calcium hypochlorite cake prepared according to the proportion of 3:7 and 00 pieces of the calcium hypochlorite cake prepared by full-sodium method granules are shown;
the testing time of the still water slow-release experiment and the running water slow-release experiment is 72 hours, and the change of the gram weight of the cake agent is recorded every 4 hours in the period;
test experiment for slow release performance of still water
The experimental group and the control group were placed in still water, respectively, and the test conditions of still water were: the water temperature is 17 ℃, the air temperature is maintained at 18-27 ℃, the gram weight of an experimental group and a control group in still water is recorded every 4h, as shown in table 1, a graph of the gram weight record change condition of a still water slow release performance test experiment is drawn according to table 1, as shown in fig. 2, and a graph of 70-tablet still water slow release effect is shown in fig. 3;
TABLE 1
In the still water experiment, 70 sustained-release tablets are not completely dissolved for 72 hours, 60 sustained-release tablets are completely dissolved within 68-72 hours, 40 sustained-release tablets are completely dissolved within 52-56 hours, 30 sustained-release tablets are completely dissolved within 44-48 hours, and 00 sustained-release tablets are completely dissolved within 8-12 hours, the sustained-release gram weight reduction of an experimental group is stable, the dissolving speed is uniform, the residual chlorine release is stable, the water body can be effectively disinfected, the sustained-release aging of a control group is short, the sustained-release gram weight reduction is severe, the residual chlorine release is reduced from overlarge step to overlow step, and the release is very unstable.
Second, testing experiment for dynamic water slow release performance
Respectively placing an experimental group and a control group in flowing water, wherein the flowing water test conditions are as follows: the flowing water flow rate is 8m/min, the water temperature is 15 ℃, the air temperature is maintained at 18-22 ℃, the gram weight of an experimental group and a control group in still water is recorded every 4h, as shown in table 2, a gram weight record change condition graph of a flowing water slow release performance test experiment is drawn according to table 2, as shown in fig. 4;
TABLE 2
In the above flowing water experiment, 70 sustained-release tablets are not completely dissolved for 72 hours, 60 tablets are completely dissolved within 68-72 hours, 40 tablets are completely dissolved within 60-64 hours, 30 tablets are completely dissolved within 48-52 hours, and 00 tablets are completely dissolved within 24-26 hours, the sustained-release gram weight reduction of an experimental group is stable, the dissolving speed is uniform, the sustained-release gram weight reduction of the experimental group is stable, the dissolving speed is uniform, the residual chlorine release is stable, the water body can be effectively disinfected, the sustained-release aging of a control group is short, the sustained-release gram weight reduction is severe, the residual chlorine release is reduced from too large to too low, and the release is very unstable.
Third, conclusion
The compound calcium hypochlorite cake agent prepared according to the proportion of 7:3 can be sustainably and slowly released for at least 72 hours, has excellent slow release performance, can be prepared according to the proportion of 6:4 if cake agent for slowly releasing 68 hours is needed, can be prepared according to the proportion of 4:6 if cake agent for slowly releasing 60 hours is needed, and can be prepared according to the proportion of 3:7 if cake agent for slowly releasing 48 hours is needed.
In conclusion, according to the preparation process and the sustained-release performance test method of the compound calcium hypochlorite cake agent for the long-acting sustained-release disinfection of the water body, the compound calcium hypochlorite cake agent can disinfect the water body in a long-acting sustained-release manner, the workload of manual putting is reduced, and according to the sustained-release performance test experiment of the cake agent, the cake agent has good linear sustained-release performance, the sustained-release gram weight is reduced stably, the dissolving speed is uniform, so that the cake agent can release the residual chlorine for the disinfection of the water body stably, can effectively disinfect the water body, and has good application prospects.
The foregoing illustrates and describes the principles, general features, and advantages of the present invention. It will be understood by those skilled in the art that the present invention is not limited to the embodiments described above, which are given by way of illustration of the principles of the present invention, but that various changes and modifications may be made without departing from the spirit and scope of the invention, and such changes and modifications are within the scope of the invention as claimed. The scope of the invention is defined by the appended claims and equivalents thereof.
Claims (9)
1. A preparation process of a compound calcium hypochlorite cake agent for long-acting slow-release disinfection of water bodies is characterized by comprising the following steps:
step (A1), weighing the powder particle mixed calcium hypochlorite raw material prepared by the calcium method for later use;
step (B1), weighing the granular calcium hypochlorite raw material prepared by the sodium method for later use;
step (C1), uniformly mixing the powder-particle mixed calcium hypochlorite raw material prepared by the calcium method and the granular calcium hypochlorite raw material prepared by the sodium method according to a certain proportion to prepare a mixed material;
and (D1) pressing the mixed material into a cake to obtain the compound calcium hypochlorite cake agent.
2. The preparation process of the compound calcium hypochlorite cake agent for long-acting slow-release disinfection water body as claimed in claim 1, wherein the particle diameter of the powder particle mixed calcium hypochlorite raw material in the step (A1) is less than 6 meshes.
3. The process for preparing the compound calcium hypochlorite cake agent for long-acting slow-release disinfection water body as claimed in claim 1, wherein the particle diameter of the granular calcium hypochlorite raw material in the step (B1) is 12-28 meshes.
4. The process for preparing the compound calcium hypochlorite cake agent for the long-acting slow-release disinfection water body according to claim 1, wherein in the step (C1), the powder-particle mixed calcium hypochlorite raw material prepared by the calcium method and the granular calcium hypochlorite raw material prepared by the sodium method are uniformly mixed according to a certain proportion, and the proportion of the powder-particle mixed calcium hypochlorite raw material to the granular calcium hypochlorite raw material is 7:3, 6:4, 4:6 and 3: 7.
5. The process for preparing the compound calcium hypochlorite cake agent for long-acting slow-release disinfection water body according to claim 1, wherein the mixed material is pressed into cake tablets in the step (D1), the mixed material is pressed by a basket tablet press, and the pressure value of the basket tablet press is 300 kn.
6. A slow release performance test method of a compound calcium hypochlorite cake agent for a long-acting slow release disinfection water body is characterized by comprising a static water slow release performance test and a dynamic water slow release performance test of the compound calcium hypochlorite cake agent;
the test of the hydrostatic sustained-release performance of the compound calcium hypochlorite cake agent comprises the following steps:
preparing materials, namely preparing corresponding compound calcium hypochlorite cakes as experimental groups according to the preparation process of the compound calcium hypochlorite cakes by respectively preparing the powder-particle mixed calcium hypochlorite raw materials and the granular calcium hypochlorite raw materials according to the ratio of 7:3, 6:4, 4:6 and 3:7, and taking the calcium hypochlorite tablets prepared by full-sodium method granules as a control group;
and (B2) placing the compound calcium hypochlorite cakes prepared in different proportions and the calcium hypochlorite tablets prepared by full-sodium method granules into still water for slow release, wherein the conditions of the still water test are as follows: the water temperature is constant, and the air temperature is maintained within a certain range;
step (C2), recording the gram weight of the experimental group and the control group in still water at intervals;
step (D2), obtaining the slow release performance of the compound calcium hypochlorite cake agent prepared in different proportions according to the recorded gram weight change;
the testing of the flowing water slow-release performance of the compound calcium hypochlorite cake agent comprises the following steps:
preparing materials, namely preparing corresponding compound calcium hypochlorite cakes as experimental groups according to the preparation process of the compound calcium hypochlorite cakes by respectively preparing the powder-particle mixed calcium hypochlorite raw materials and the granular calcium hypochlorite raw materials according to the ratio of 7:3, 6:4, 4:6 and 3:7, and taking the calcium hypochlorite tablets prepared by full-sodium method granules as a control group;
and (B3) placing the compound calcium hypochlorite cake agent prepared in different proportions and the calcium hypochlorite tablet prepared by full-sodium method granules into flowing water for slow release, wherein the conditions of the flowing water test are as follows: the flowing water flow rate is constant, the water temperature is constant, and the air temperature is maintained within a certain range;
step (C3), recording the gram weight of the experimental group and the control group in the running water at intervals;
and (D3) obtaining the slow release performance of the compound calcium hypochlorite cakes prepared in different proportions according to the recorded gram weight change.
7. The method for testing the slow release performance of the compound calcium hypochlorite cake agent for the long-acting slow release disinfection water body according to claim 6, wherein the conditions of the hydrostatic test in the step (B2) are as follows: the water temperature is 17 ℃, and the air temperature is maintained at 18-27 ℃.
8. The method for testing the slow release performance of the compound calcium hypochlorite cake agent for the long-acting slow release disinfection water body according to claim 6, wherein the conditions of the running water test in the step (B3) are as follows: the flowing water flow rate is 8m/min, the water temperature is 15 ℃, and the air temperature is maintained at 18-22 ℃.
9. The method for testing the slow release performance of the compound calcium hypochlorite cake agent for the long-acting slow release disinfection water body as claimed in claim 6, wherein the recording interval time in the step (C2) and the recording interval time in the step (C3) are both 4 h.
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Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4865760A (en) * | 1988-04-06 | 1989-09-12 | Ppg Industries, Inc. | Calcium hypochlorite composition |
| CN1198889A (en) * | 1998-06-05 | 1998-11-18 | 李雪松 | Disinfecting detergent tablet |
| DE102005002553B3 (en) * | 2005-01-19 | 2006-03-30 | Bayrol Deutschland Gmbh | Chlorine-releasing tablets useful for chlorinating water comprise trichloroisocyanuric acid in granular form and anhydrous sodium dichloroisocyanurate in powder form |
| CN1853615A (en) * | 2003-10-20 | 2006-11-01 | 爱诗爱诗制药株式会社 | Tablet containing brufen and producing process thereof |
| CN101430265A (en) * | 2008-12-09 | 2009-05-13 | 山东省农业科学院土壤肥料研究所 | Detection method for non-water soluble material envelope controlled-release fertilizer nutrient release |
| CN103523938A (en) * | 2012-07-06 | 2014-01-22 | 上海蓝宇水处理有限公司 | Composite disinfection tablet |
| CN108935454A (en) * | 2012-07-19 | 2018-12-07 | 日本曹达株式会社 | Water dispersible granules |
| CN110623931A (en) * | 2019-10-09 | 2019-12-31 | 苏州弘森药业股份有限公司 | Piribedil sustained-release tablet and preparation method thereof |
| CN111869678A (en) * | 2020-08-13 | 2020-11-03 | 上海蓝宇水处理股份有限公司 | Environment-friendly sterilization and disinfection composition and preparation method thereof |
| CN215750945U (en) * | 2021-09-18 | 2022-02-08 | 德州凯密迪化工有限公司 | Calcium hypochlorite tablet press |
-
2022
- 2022-06-20 CN CN202210697018.6A patent/CN114982778A/en active Pending
Patent Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4865760A (en) * | 1988-04-06 | 1989-09-12 | Ppg Industries, Inc. | Calcium hypochlorite composition |
| CN1198889A (en) * | 1998-06-05 | 1998-11-18 | 李雪松 | Disinfecting detergent tablet |
| CN1853615A (en) * | 2003-10-20 | 2006-11-01 | 爱诗爱诗制药株式会社 | Tablet containing brufen and producing process thereof |
| DE102005002553B3 (en) * | 2005-01-19 | 2006-03-30 | Bayrol Deutschland Gmbh | Chlorine-releasing tablets useful for chlorinating water comprise trichloroisocyanuric acid in granular form and anhydrous sodium dichloroisocyanurate in powder form |
| CN101430265A (en) * | 2008-12-09 | 2009-05-13 | 山东省农业科学院土壤肥料研究所 | Detection method for non-water soluble material envelope controlled-release fertilizer nutrient release |
| CN103523938A (en) * | 2012-07-06 | 2014-01-22 | 上海蓝宇水处理有限公司 | Composite disinfection tablet |
| CN108935454A (en) * | 2012-07-19 | 2018-12-07 | 日本曹达株式会社 | Water dispersible granules |
| CN110623931A (en) * | 2019-10-09 | 2019-12-31 | 苏州弘森药业股份有限公司 | Piribedil sustained-release tablet and preparation method thereof |
| CN111869678A (en) * | 2020-08-13 | 2020-11-03 | 上海蓝宇水处理股份有限公司 | Environment-friendly sterilization and disinfection composition and preparation method thereof |
| CN215750945U (en) * | 2021-09-18 | 2022-02-08 | 德州凯密迪化工有限公司 | Calcium hypochlorite tablet press |
Non-Patent Citations (1)
| Title |
|---|
| 《通用化工产品分析方法手册》编写组: "《通用化工产品分析方法手册》", 化学工业出版社, pages: 260 - 262 * |
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