CN111436426A - Secondary chlorination capsule for water delivery of water supply pipeline and preparation method thereof - Google Patents
Secondary chlorination capsule for water delivery of water supply pipeline and preparation method thereof Download PDFInfo
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- CN111436426A CN111436426A CN202010393947.9A CN202010393947A CN111436426A CN 111436426 A CN111436426 A CN 111436426A CN 202010393947 A CN202010393947 A CN 202010393947A CN 111436426 A CN111436426 A CN 111436426A
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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
- A01N25/26—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 in coated particulate form
- A01N25/28—Microcapsules or nanocapsules
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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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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/50—Treatment of water, waste water, or sewage by addition or application of a germicide or by oligodynamic treatment
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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
- C02F2303/00—Specific treatment goals
- C02F2303/04—Disinfection
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- Agronomy & Crop Science (AREA)
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Abstract
The invention discloses a secondary chlorination capsule for water delivery of a water supply pipeline and a preparation method thereof. The method comprises the following steps: preparing a mixed emulsion from the components of the food-grade slowly-soluble shell, coating the mixed emulsion on the surface of a flat plate to form an emulsion coating, heating the emulsion coating to form a food-grade slowly-soluble sheet, and pressing the food-grade slowly-soluble sheet into a capsule shell; and separating the capsule shell, filling a sodium hypochlorite component, and locking to prepare a capsule-shaped structure body formed by wrapping the food-grade slow-soluble shell outside the sodium hypochlorite component. The secondary chlorination capsule improves the existing secondary chlorination mode, completes secondary chlorination of a pipe network under the condition of not building a secondary chlorination facility, reduces the construction of secondary chlorination auxiliary facilities, avoids the unsafety of daily maintenance of the facility, and realizes simple and efficient secondary chlorination process, thereby maintaining the residual chlorine concentration of the pipe network and ensuring the water quality of the pipe network.
Description
Technical Field
The invention relates to the field of water treatment, in particular to a secondary chlorination capsule for water delivery of a water supply pipeline.
Background
The urban water supply network system is complex and huge, and even if the water subjected to water supply treatment reaches the drinking water standard when leaving the factory, the possibility of secondary pollution exists in the conveying process, so that a certain residual chlorine concentration needs to be maintained in the pipe network. With the continuous extension of pipelines, the concentration of residual chlorine at the tail end of a pipe network is difficult to ensure, and chlorine needs to be added in the middle of water delivery.
In the traditional secondary chlorination, the position and the feeding mode of a feeding point are determined, feeding equipment and accessory facilities are built, and then feeding is carried out.
However, the secondary chlorination method is not beneficial to operation and management, but also poses a threat to personal safety, and the concentration of residual chlorine in the pipe network after secondary chlorination is not uniformly distributed, so that the effect is not ideal.
Disclosure of Invention
Based on the problems in the prior art, the invention aims to provide a secondary chlorination capsule for water delivery of a water supply pipeline and a preparation method thereof, which can solve the problems that the existing secondary chlorination mode is not beneficial to operation management and poses threats to personal safety, and the concentration distribution of residual chlorine after chlorination is not uniform, the effect is not ideal, and the like.
The purpose of the invention is realized by the following technical scheme:
the embodiment of the invention relates to a secondary chlorination capsule for water delivery of a water supply pipeline, which is characterized in that the secondary chlorination capsule is a capsule-shaped structure body formed by wrapping a food-grade slow-soluble shell outside a sodium hypochlorite component.
The embodiment of the invention also provides a preparation method of the secondary chlorination capsule for water supply pipeline water delivery, which is used for preparing the secondary chlorination capsule for water supply pipeline water delivery, and comprises the following steps:
preparing a mixed emulsion from the constituent materials of the food-grade slow-dissolving shell serving as a wall material, coating the prepared mixed emulsion on the surface of a flat plate to form an emulsion coating with uniform thickness, heating at 85-95 ℃ to prepare an elastic food-grade slow-dissolving sheet, and pressing the elastic food-grade slow-dissolving sheet into a capsule-shaped food-grade slow-dissolving shell;
and after the food-grade slowly-soluble shell in the capsule shape is separated, filling the separated food-grade slowly-soluble shell in the shape of the capsule with a sodium hypochlorite component serving as a core material, and locking the separated food-grade slowly-soluble shell to prepare the capsule-shaped structure body formed by wrapping the food-grade slowly-soluble shell outside the sodium hypochlorite component.
According to the technical scheme provided by the invention, the secondary chlorination capsule for water delivery of the water supply pipeline provided by the embodiment of the invention has the beneficial effects that:
the food-grade slow-soluble shell is wrapped outside the sodium hypochlorite component, so that a capsule-shaped structure body with the core material being the sodium hypochlorite component and the wall material being the food-grade slow-soluble shell is formed. The secondary chlorination capsule can be conveniently added into a water pipeline to realize secondary chlorination of the water pipeline, and the food-grade slow-soluble shell can be slowly dissolved in water, so that a slow-release effect is achieved, the residual chlorine concentration of a pipe network can be maintained, a secondary chlorination facility does not need to be additionally constructed, and the management cost of the chlorination facility of the water supply pipe network is effectively reduced. In addition, the substances dissolved in the food-grade slowly soluble shell do not have negative influence on water quality.
Detailed Description
The technical solutions in the embodiments of the present invention are clearly and completely described below with reference to the specific contents 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 embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments of the present invention without making any creative effort, shall fall within the protection scope of the present invention. Details which are not described in detail in the embodiments of the invention belong to the prior art which is known to the person skilled in the art.
The embodiment of the invention provides a secondary chlorination capsule for water delivery of a water supply pipeline, which is a capsule-shaped structure body formed by wrapping a food-grade slow-soluble shell outside a sodium hypochlorite component.
In the secondary chlorination capsule, the using amount of the food-grade slow-dissolving shell is 60-70% by weight, and the using amount of the sodium hypochlorite component is 30-40% by weight.
In the secondary chlorination capsule, the sodium hypochlorite component is composed of sodium hypochlorite powder with the solid content of 60%.
In the secondary chlorination capsule, the food-grade slow-soluble shell comprises the following components in percentage by weight: 55% of whey protein isolate, 25% of stabilizer, 5% of defoaming agent, 5% of anti-sticking agent, 5% of dehydrating agent and 5% of releasing agent.
In the secondary chlorination capsule, the whey protein isolate adopts powdery whey protein isolate;
the stabilizer is acetate modified starch;
the defoaming agent adopts edible defoaming agents, such as: a higher alcohol fatty acid ester defoamer;
the anti-sticking agent adopts cassava starch;
the dehydrating agent adopts edible alkali;
the release agent adopts ArcChine Foodtech 3-H food-grade release oil,
the food-grade slow-soluble shell composed of the components is made of food-grade materials, cannot pollute water, can guarantee good slow release, and achieves the effect of uniformly putting in sodium hypochlorite components serving as disinfectants.
In the secondary chlorination capsule, the food-grade slow-soluble shell is of a net structure.
The embodiment of the invention also provides a preparation method of the secondary chlorination capsule for water supply pipeline water delivery, which is used for preparing the secondary chlorination capsule for water supply pipeline water delivery and comprises the following steps:
preparing a mixed emulsion from the constituent materials of the food-grade slow-dissolving shell serving as a wall material, coating the prepared mixed emulsion on the surface of a flat plate to form an emulsion coating with uniform thickness, heating at 85-95 ℃ to prepare an elastic food-grade slow-dissolving sheet, and pressing the elastic food-grade slow-dissolving sheet into a capsule-shaped food-grade slow-dissolving shell;
and after the food-grade slowly-soluble shell in the capsule shape is separated, filling the separated food-grade slowly-soluble shell in the shape of the capsule with a sodium hypochlorite component serving as a core material, and locking the separated food-grade slowly-soluble shell to prepare the capsule-shaped structure body formed by wrapping the food-grade slowly-soluble shell outside the sodium hypochlorite component.
Specifically, the steps of the method are as follows: preparing a mixed emulsion from the constituent materials of a food-grade slow-dissolving shell serving as a wall material, coating the prepared mixed emulsion on the surface of a flat plate to form an emulsion coating with uniform thickness (the thickness is not too thick and is equal to or slightly thicker than that of a common medicinal material capsule shell), heating at 85-95 ℃ to evaporate water on the surface of the emulsion coating to form a tough and elastic food-grade slow-dissolving tablet, and pressing the food-grade slow-dissolving tablet into a capsule-shaped food-grade slow-dissolving shell by adopting an automatic rotary capsule rolling machine;
separating the capsule-shaped food-grade slow-dissolving shell by using a full-automatic capsule filling machine, filling the separated capsule-shaped food-grade slow-dissolving shell with a sodium hypochlorite component serving as a core material, and locking the separated food-grade slow-dissolving shell to prepare a capsule-shaped structure body formed by wrapping the food-grade slow-dissolving shell outside the sodium hypochlorite component.
In the preparation method, the components of the food-grade slow-soluble shell serving as the wall material are prepared into a mixed emulsion which comprises the following components in parts by weight: the preparation method comprises the following steps of uniformly mixing 55% of whey protein isolate, 25% of stabilizer, 5% of defoamer, 5% of anti-sticking agent, 5% of dehydrating agent and 5% of releasing agent by weight percent to prepare mixed emulsion.
The secondary chlorination capsule can perform midway chlorination on a special water conveying line of a series water supply system, the secondary chlorination capsule is slowly dissolved in water after being added, the shell is just completely dissolved when the secondary chlorination point position is reached, the wrapped sodium hypochlorite component (namely disinfectant) starts to be released, secondary chlorination of the pipeline is realized, and the dissolved substances do not generate negative influence on water quality. The invention only needs to add a proper amount of secondary chlorination capsules at the water outlet of the water plant according to the water quantity, the position of the secondary chlorination point and the secondary chlorination amount, realizes secondary chlorination of the pipeline, reduces the auxiliary facilities of secondary chlorination, has simple and convenient operation, is economic and feasible, and has great market application prospect.
The embodiments of the present invention are described in further detail below.
The secondary chlorination capsule for water delivery of the water supply pipeline is a capsule-shaped structure body formed by wrapping a food-grade slow-soluble shell with a sodium hypochlorite component, and specifically, the amount of the sodium hypochlorite component and the amount of the food-grade slow-soluble shell in the capsule are 30-40% and 60-70% by weight respectively.
Wherein the sodium hypochlorite component consists of sodium hypochlorite powder with a solid content of 60%;
the food-grade slow-soluble shell comprises the following components in percentage by weight: 55% of whey protein isolate component, 25% of stabilizer, 5% of defoaming agent, 5% of anti-sticking agent, 5% of dehydrating agent and 5% of releasing agent; the food-grade slow-soluble shell is wrapped outside the sodium hypochlorite component.
In the food-grade slow-soluble shell, the whey protein isolate is powdery whey protein isolate; the stabilizer is acetate modified starch; the defoaming agent is an edible defoaming agent (such as a higher alcohol fatty acid ester defoaming agent); the anti-sticking agent adopts cassava starch; the dehydrating agent adopts edible alkali; the release agent adopts ArcChine Foodtech 3-H food-grade release oil.
The secondary chlorination capsule for water delivery of the water supply pipeline comprises the following manufacturing processes: the preparation method is characterized in that a food-grade slowly-soluble shell is used as a wall material, and the materials forming the food-grade slowly-soluble shell are prepared into mixed emulsion, and specifically comprises the following steps: the preparation method comprises the following steps of: preparing a mixed emulsion from 55% of whey protein isolate, 25% of a stabilizer, 5% of a defoaming agent, 5% of an anti-sticking agent, 5% of a dehydrating agent and 5% of a release agent, coating the prepared mixed emulsion on the surface of a flat plate to form an emulsion coating with uniform thickness, heating at the temperature of 85-95 ℃ to evaporate water on the surface of the emulsion coating to form a food-grade slowly-soluble sheet with certain toughness and elasticity, and pressing the food-grade slowly-soluble sheet by using an automatic rotary capsule rolling machine to form a food-grade slowly-soluble shell in a capsule shape;
separating the capsule-shaped food-grade slow-dissolving shell by using a full-automatic capsule filling machine, filling the separated capsule-shaped food-grade slow-dissolving shell with a sodium hypochlorite component serving as a core material, and locking the separated food-grade slow-dissolving shell to prepare a capsule-shaped structure body formed by wrapping the food-grade slow-dissolving shell outside the sodium hypochlorite component.
This secondary chlorination capsule for water supply pipeline water delivery is arranged in the secondary chlorination of water supply pipeline before connecting in series water supply system water delivery special line or the access user, and the food level slowly soluble shell of capsule slowly dissolves in the pipeline, dissolves completely and releases disinfectant when secondary chlorination is some, and the shell after dissolving does not produce negative effects to quality of water. And calculating the position of a secondary chlorination point and the secondary chlorination amount according to a formula, and selecting a proper amount of wall materials and core materials to manufacture a secondary chlorination capsule by combining a dissolution rate formula of the food-grade slow-soluble shell, so that the shell can just reach the position of the secondary chlorination point when being completely dissolved.
When the secondary chlorination capsule is used, the position of a secondary chlorination point and the secondary chlorination amount can be calculated according to the following formula, and the secondary chlorination capsule is manufactured by selecting a proper amount of wall materials and core materials according to the dissolution rate formula of the food-grade slow-soluble shell, so that the shell can just reach the position of the secondary chlorination point when being completely dissolved.
The model for determining the position of the secondary chlorination point is as follows:
in the formula (1), Di-water usage of node i;
n is the number of nodes;
xi-0 or 1, 0 indicating that no secondary chlorination site is provided at that site, and 1 indicating that a secondary chlorination site is provided at that site;
yi-0 or 1, 0 indicating that the point is covered and 1 indicating that the point is uncovered.
The model for determining the secondary chlorine addition is as follows:
in the formula (2), P is the total chlorine adding amount and comprises the chlorine adding amount of a fixed chlorine adding point;
m is the optimal number of chlorination points determined by optimal configuration of chlorination points;
xithe chlorine adding concentration of the ith chlorine adding point.
The constraint condition is that the residual chlorine concentration of each node in the pipe network meets the water quality standard, namely:
in the formula (3), cmax-upper limit value of residual chlorine in pipe network water;
cmin-a lower limit value of residual chlorine in the pipe network water;
Cj-chlorine concentration at a point upstream of point i;
l-the number of points upstream of point i;
kj,t-total residual chlorine decay factor between points j, t;
tj,t-the time of water transfer between points j, t;
c0i-the amount of chlorine added at the ith chlorine addition point;
Qj-flow at point j.
The food grade slow soluble shell dissolution rate formula is as follows:
wherein c is the concentration of whey protein;
t is dissolution time;
v-shell emulsion volume;
a is the emulsion surface area.
According to the secondary chlorination capsule, the sodium hypochlorite component serving as a disinfectant is wrapped in the food-grade slow-soluble shell as a core material, so that the sodium hypochlorite component is conveniently added into a water supply pipeline, the food-grade slow-soluble shell is slowly dissolved in water, the shell is just completely dissolved when the food-grade slow-soluble shell reaches the position of a secondary chlorination point, the wrapped sodium hypochlorite component of the disinfectant starts to be released, secondary chlorination of a water supply pipeline is realized, the concentration of residual chlorine in the pipe network can be maintained, a secondary chlorination facility does not need to be additionally constructed, and the management cost of the chlorination facility of the water supply pipe network is. And the dissolved substances do not have negative influence on the water quality, and the invention only needs to add a proper amount of the secondary chlorination capsule at the water outlet of the water plant according to the water quantity, the position of the secondary chlorination point and the secondary chlorination amount, thereby realizing the secondary chlorination of the pipeline and having great market application prospect. The secondary chlorination capsule for water delivery of the water supply pipeline improves the existing secondary chlorination mode, completes secondary chlorination of a pipe network under the condition of not building a secondary chlorination facility, reduces the construction of an auxiliary facility for secondary chlorination, avoids the unsafety of daily maintenance of the facility, and realizes the simplification and high efficiency of the secondary chlorination process, thereby maintaining the concentration of residual chlorine in the pipe network and ensuring the water quality of the pipe network.
The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any changes or substitutions that can be easily conceived by those skilled in the art within the technical scope of the present invention are included in the scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.
Claims (8)
1. A secondary chlorination capsule for water delivery of a water supply pipeline is characterized in that the secondary chlorination capsule is a capsule-shaped structure body formed by wrapping a food-grade slow-soluble shell outside a sodium hypochlorite component.
2. The secondary chlorination capsule for water delivery of a water supply pipeline according to claim 1, wherein the food-grade slow-dissolving shell is 60-70% by weight, and the sodium hypochlorite component is 30-40% by weight.
3. The double chlorination capsule according to claim 1 or 2, wherein the sodium hypochlorite component is composed of sodium hypochlorite powder with a solid content of 60%.
4. The double chlorination capsule for water supply pipeline water transportation according to claim 1 or 2, wherein the food grade slow dissolving shell is composed of the following components by weight percentage: 55% of whey protein isolate, 25% of stabilizer, 5% of defoaming agent, 5% of anti-sticking agent, 5% of dehydrating agent and 5% of releasing agent.
5. The double chlorination capsule as claimed in claim 4, wherein the whey protein isolate is powdered whey protein isolate;
the stabilizer is acetate modified starch;
the defoaming agent is an edible defoaming agent (a higher alcohol fatty acid ester defoaming agent);
the anti-sticking agent adopts cassava starch;
the dehydrating agent adopts edible alkali;
the release agent adopts ArcChine Foodtech 3-H food-grade release oil.
6. The double chlorination capsule as claimed in claim 1 or 2, wherein the food grade slow soluble shell is a mesh structure.
7. A method for preparing a secondary chlorination capsule for water supply pipeline water delivery according to any one of claims 1 to 5, comprising the steps of:
preparing a mixed emulsion from the constituent materials of the food-grade slow-dissolving shell serving as a wall material, coating the prepared mixed emulsion on the surface of a flat plate to form an emulsion coating with uniform thickness, heating at 85-95 ℃ to prepare an elastic food-grade slow-dissolving sheet, and pressing the elastic food-grade slow-dissolving sheet into a capsule-shaped food-grade slow-dissolving shell;
and after the food-grade slowly-soluble shell in the capsule shape is separated, filling the separated food-grade slowly-soluble shell in the shape of the capsule with a sodium hypochlorite component serving as a core material, and locking the separated food-grade slowly-soluble shell to prepare the capsule-shaped structure body formed by wrapping the food-grade slowly-soluble shell outside the sodium hypochlorite component.
8. The method for preparing the secondary chlorination capsule for water delivery of water supply pipeline according to claim 7, wherein the components constituting the food-grade slow-soluble shell are prepared into mixed emulsion as follows:
the preparation method comprises the following steps of uniformly mixing 55% of whey protein isolate, 25% of stabilizer, 5% of defoamer, 5% of anti-sticking agent, 5% of dehydrating agent and 5% of releasing agent by weight percent to prepare mixed emulsion.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114065949A (en) * | 2022-01-17 | 2022-02-18 | 心鉴智控(深圳)科技有限公司 | Intelligent water quality prediction dosing system based on historical data |
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