CN106860900B - Chlorine dioxide preparation and stable sustained release device - Google Patents

Chlorine dioxide preparation and stable sustained release device Download PDF

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Publication number
CN106860900B
CN106860900B CN201710133648.XA CN201710133648A CN106860900B CN 106860900 B CN106860900 B CN 106860900B CN 201710133648 A CN201710133648 A CN 201710133648A CN 106860900 B CN106860900 B CN 106860900B
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chlorine dioxide
air
parts
solid tablet
sodium
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CN106860900A (en
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周瑛
卢晗锋
张震东
叶佳杰
陈杭棋
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Hangzhou Singze Technology Co ltd
Zhejiang University of Technology ZJUT
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Hangzhou Singze Technology Co ltd
Zhejiang University of Technology ZJUT
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    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61L—METHODS OR APPARATUS FOR STERILISING MATERIALS OR OBJECTS IN GENERAL; DISINFECTION, STERILISATION OR DEODORISATION OF AIR; CHEMICAL ASPECTS OF BANDAGES, DRESSINGS, ABSORBENT PADS OR SURGICAL ARTICLES; MATERIALS FOR BANDAGES, DRESSINGS, ABSORBENT PADS OR SURGICAL ARTICLES
    • A61L9/00—Disinfection, sterilisation or deodorisation of air
    • A61L9/015—Disinfection, sterilisation or deodorisation of air using gaseous or vaporous substances, e.g. ozone
    • A61L9/04—Disinfection, sterilisation or deodorisation of air using gaseous or vaporous substances, e.g. ozone using substances evaporated in the air without heating
    • A61L9/12—Apparatus, e.g. holders, therefor
    • 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
    • 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
    • C—CHEMISTRY; METALLURGY
    • C01—INORGANIC CHEMISTRY
    • C01B—NON-METALLIC ELEMENTS; COMPOUNDS THEREOF; METALLOIDS OR COMPOUNDS THEREOF NOT COVERED BY SUBCLASS C01C
    • C01B11/00—Oxides or oxyacids of halogens; Salts thereof
    • C01B11/02—Oxides of chlorine
    • C01B11/022—Chlorine dioxide (ClO2)
    • C01B11/023—Preparation from chlorites or chlorates
    • C01B11/024—Preparation from chlorites or chlorates from chlorites
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61L—METHODS OR APPARATUS FOR STERILISING MATERIALS OR OBJECTS IN GENERAL; DISINFECTION, STERILISATION OR DEODORISATION OF AIR; CHEMICAL ASPECTS OF BANDAGES, DRESSINGS, ABSORBENT PADS OR SURGICAL ARTICLES; MATERIALS FOR BANDAGES, DRESSINGS, ABSORBENT PADS OR SURGICAL ARTICLES
    • A61L2209/00—Aspects relating to disinfection, sterilisation or deodorisation of air
    • A61L2209/20—Method-related aspects
    • A61L2209/21—Use of chemical compounds for treating air or the like

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  • Disinfection, Sterilisation Or Deodorisation Of Air (AREA)

Abstract

The invention relates to a chlorine dioxide stable release device and a using method thereof as well as a preparation method of a chlorine dioxide precursor solid tablet, the device comprises a reactor and an air conveying device, the reactor is a reaction tank with an open upper part and a waste storage tank at the bottom, a support net is arranged in the middle of the reaction tank, a chlorine dioxide precursor solid tablet storage tank is arranged at the upper end of the support net, the chlorine dioxide precursor solid tablet storage tank is connected with the reaction tank through a first valve and a downward-inclined pipeline, an air-tight second valve is arranged between the support net and the waste storage tank, and the aperture of the support net is not larger than that of the chlorine oxide precursor solid tablet; air conveying device includes the air pump, is equipped with air inlet and air outlet's water bath, and air inlet establishes in the below of waiting to establish the water bath horizontal plane, and air outlet establishes the top of water bath, air inlet passes through air sampling pipe and air pump intercommunication, and air outlet passes through humid air sampling pipe and retort intercommunication, and the junction is established between supporting network and second valve.

Description

Chlorine dioxide preparation and stable sustained release device
Technical Field
The invention relates to the technical field of indoor air pollution control, in particular to a method for efficiently disinfecting and sterilizing indoor air, which can be widely applied to air purification in closed environments such as laboratories, hospitals, houses, offices, entertainment rooms and the like.
Background
Chlorine dioxide is currently recognized as a safe, spectrally bactericidal, preservative and deodorant, even having a degrading effect on indoor formaldehyde. The countries in the Europe and the America have popularized and used chlorine dioxide as an indoor air purifying agent. However, the current methods for using chlorine dioxide are mainly divided into three methods: (1) Directly synthesizing chlorine dioxide on site, and directly reacting chlorite and hydrochloric acid to generate chlorine dioxide gas for indoor air purification; (2) Dissolving chlorine dioxide gas in water by using a chlorine dioxide aqueous solution, and then atomizing and spraying the chlorine dioxide gas to the indoor environment for purification; (3) The chlorine dioxide slow-release solid tablet is prepared and placed in the air to slowly volatilize.
Although the use methods of the chlorine dioxide play a good role in indoor air purification, one problem cannot be ignored, namely how to control the long-term stable release of the chlorine dioxide in the indoor environment to achieve the aim of continuous disinfection and purification. The first method can rapidly release high-concentration chlorine dioxide gas to achieve strong disinfection, but the duration is short; the second method can achieve the purpose of powerful purification in the spraying and atomizing stage, but atomized liquid drops are easy to settle, the diffusion effect in the air is not obvious, and the method is only suitable for emergency treatment in a local range; in the third method, the chlorine dioxide sustained release tablet is the purification technology with the greatest popularization value at present, and is pressed into a solid tablet by combining raw materials such as chlorate, an activating agent, a stabilizing agent and the like. The chlorine dioxide slow-release tablet is placed in the air and slowly contacts with water molecules in the air to trigger a chemical reaction so as to release a small amount of chlorine dioxide gas, although the method achieves the effect of slow release of chlorine dioxide, the slow-release tablet is very unstable when contacting with the water molecules in the air, the release speed of chlorine dioxide is greatly influenced by the humidity and convection speed in the air, and the release of the chlorine dioxide slow-release tablet is ineffective in certain specific environments (such as dry environment, low temperature environment and closed environment). In addition, the replacement of the chlorine dioxide sustained-release tablets after the failure causes great troubles to the use. Therefore, it is necessary to develop a method and a device for more stable release of chlorine dioxide for indoor air purification and disinfection treatment.
Disclosure of Invention
The invention aims to provide a device and a method for stably and continuously releasing chlorine dioxide, which comprise a method for preparing and using a chlorine dioxide precursor solid tablet. The method can well control the release of chlorine dioxide in indoor environment, and is not influenced by humidity and air convection in the environment.
In order to realize the purpose, the invention adopts the following technical scheme:
a chlorine dioxide release device comprises a reactor and an air conveying device, wherein the reactor is a reaction tank 6 with an open upper part and a waste storage tank at the bottom, a support net 4 is arranged in the middle of the reaction tank, a chlorine dioxide precursor solid tablet storage tank 1 is arranged at the upper end of the support net 4, the chlorine dioxide precursor solid tablet storage tank 1 is connected with the reaction tank 6 through a pipeline 2 with a first valve 13 and inclined downwards, a gas-tight second valve 5 is arranged between the support net and the waste storage tank, and the aperture of the support net 4 is not larger than that of the chlorine dioxide precursor solid tablet; air conveying device include air pump 10, be equipped with air inlet and air outlet's water bath 8, air inlet establish in the top of treating establishing the water bath horizontal plane, air outlet establish the top of water bath, air inlet pass through air sampling pipe 11 and air pump intercommunication, air outlet pass through humid air sampling pipe 12 and retort intercommunication, humid air sampling pipe 12 and retort 6 junction establish between supporting network 4 and second valve 5.
Further, the upper part of the reactor is open and the shape of the reactor is inverted cone.
Furthermore, the top of the water bath kettle is provided with a water injection hole 7 with a sealing cover.
Further, the water bath kettle is provided with a temperature controller 9.
Furthermore, the supporting net 4 is provided with a through hole, and the through hole is provided with a connecting sheet which is matched with the through hole and can be opened and closed.
In addition, the invention also provides a using method of the chlorine dioxide releasing device, which comprises the following steps: firstly, water is injected into a water bath kettle, the water level is not higher than an air inlet when water is injected, then a supporting net 4 and a second valve 5 are tightly closed, the first valve is opened to enable part of chlorine dioxide precursor solid tablets to fall onto the supporting net 4 from a chlorine dioxide precursor solid tablet storage tank 1 through a pipeline 2, the first valve is closed, an air pump 10 is opened to enable wet air which passes through the water bath kettle and carries moisture to enter a reaction tank 6, and the wet air is in contact reaction with the chlorine dioxide precursor solid tablets through supporting meshes to generate chlorine dioxide and flow out from an opening of a reactor.
Further, after the chlorine dioxide precursor solid tablet is invalid, the air pump is closed, and the connecting sheet and the second valve on the supporting net are opened, so that the invalid chlorine dioxide precursor solid tablet falls into a waste storage tank at the bottom of the reaction tank 6.
Further, the preparation method of the chlorine dioxide precursor solid tablet comprises the following steps: weighing 20-70 parts of sodium chlorite, 5-25 parts of activating agent, 2-10 parts of stabilizing agent, 2-10 parts of humectant, 2-10 parts of coating agent, 2-10 parts of forming agent and 2-35 parts of filling agent according to the weight ratio, drying to remove water, grinding and mixing in an environment with the relative humidity of less than 30%, and then pressing into a chlorine dioxide precursor solid tablet by using a tablet press; the activating agent is one or the mixture of more than two of citric acid, malic acid, tartaric acid, sodium hydrogen sulfate or sodium dihydrogen phosphate; the stabilizer is one or the mixture of more than two of anhydrous calcium salt, anhydrous magnesium salt or anhydrous sodium salt; the humectant is one or a mixture of more than two of 13X, 4A or 5A molecular sieves; the coating agent is polyethylene glycol or gelatin; the forming agent is one or a mixture of more than two of sodium carboxymethylcellulose, pregelatinized starch or acrylamide and sodium hexadecyl sulfonate; the filler is one or a mixture of more than two of sodium sulfate, magnesium sulfate and calcium carbonate.
Further, the stabilizer is one or a mixture of more than two of anhydrous calcium chloride, anhydrous magnesium chloride, anhydrous sodium sulfate, anhydrous sodium hydrogen sulfate and anhydrous magnesium sulfate.
Further, the activator of the present invention is preferably citric acid or malic acid.
The preparation method of the chlorine dioxide precursor solid tablet of the invention is preferably as follows: weighing 20-50 parts of sodium chlorite, 10-25 parts of activating agent, 5-10 parts of stabilizing agent, 3-6 parts of humectant, 5-10 parts of coating agent, 5-10 parts of forming agent and 2-35 parts of filling agent according to the weight ratio, drying to remove water, grinding and mixing in an environment with the relative humidity of less than 30%, and pressing into a chlorine dioxide precursor solid tablet by using a tablet press; the activating agent is one or the mixture of more than two of citric acid, tartaric acid, sodium bisulfate and sodium dihydrogen phosphate; the stabilizer is one or the mixture of more than two of anhydrous calcium salt, anhydrous magnesium salt or anhydrous sodium salt; the humectant is one or a mixture of more than two of 13X, 4A or 5A molecular sieves; the coating agent is polyethylene glycol or gelatin; the forming agent is one or a mixture of more than two of sodium carboxymethylcellulose, pregelatinized starch or sodium acrylamide hexadecyl sulfonate, and the filling agent is one or a mixture of more than two of sodium sulfate, magnesium sulfate or calcium carbonate.
In order to stably control the generation amount of chlorine dioxide in the air, the device of the invention controls the humidity and the convection degree in the air as follows: (1) The air humidity control in contact with chlorine dioxide is provided with a water bath with temperature control, and the temperature of the whole water bath is accurately controlled, so that the saturated vapor pressure of water is controlled, and the absolute humidity of the air above the water surface is accurately controlled; (2) Controlling air flow rate, and arranging an air pump with flow control to realize control on air convection; the amount of the water molecules in the flowing air can be accurately quantified through the control of the (1) and the (2); (3) The chlorine dioxide slow-release tablets can be continuously replaced by opening and closing the chlorine dioxide precursor solid tablet storage tank, so that the aim of long-acting purification treatment is fulfilled.
Furthermore, in the using method of the chlorine dioxide release device, a certain amount of water molecules are adsorbed on the surface of the chlorine dioxide precursor solid tablet, and the amount of the water molecules adsorbed on the surface of the solid tablet and the molecular weight of water in the air can reach dynamic balance under the action of the humectant and the stabilizer, so that chemical reaction is initiated, and chlorine dioxide gas is generated. The generation amount of the chlorine dioxide gas is positively correlated with the water molecule content and convection of air around the tablet, so that the generation of the chlorine dioxide gas can be accurately controlled by adjusting the air flow and the temperature of the water bath, and the aim of stably releasing the chlorine dioxide in the air is fulfilled.
In order to stably control the generation amount of chlorine dioxide in the air, the invention adopts the following technical scheme: as shown in fig. 1, air generated by an air pump 10 with adjustable air flow passes through a water bath 8 with precise temperature control, and takes away precise and quantitative water molecules in the flowing air, and then contacts with a tablet 3 of a chlorine dioxide precursor, and the surface of the tablet of the chlorine dioxide precursor adsorbs a certain amount of water molecules, and through the action of a humectant and a stabilizer, the amount of water molecules adsorbed on the surface of a solid tablet and the molecular weight of water in the air reach dynamic equilibrium, so that a chemical reaction is initiated, and chlorine dioxide gas is generated. The generation amount of the chlorine dioxide gas is positively correlated with the water molecule content and convection of air around the tablet, so that the generation of the chlorine dioxide gas can be accurately controlled by adjusting the air flow and the temperature of the water bath, and the aim of stably releasing the chlorine dioxide in the air is fulfilled.
The invention has the beneficial effects that: the stable release of chlorine dioxide can be free from the influence of the surrounding environment, and the chlorine dioxide is released to form a self-forming system, so that the aim of accurate control can be fulfilled. Thereby making it suitable for use in a variety of different environments. In addition, by controlling the air flow rate and the humidity, chlorine dioxide can be rapidly diffused in an indoor environment, and the chlorine dioxide gas with the humidity has stronger sterilization and oxidation capacities than dry chlorine dioxide gas. The method provided by the invention facilitates the use of chlorine dioxide in various environments, improves the safety of products and has wide market prospect.
Drawings
Fig. 1 is a diagram of a device for stably releasing chlorine dioxide according to the present invention.
In the figure, 1-chlorine dioxide precursor solid tablet storage tank, 2-pipeline, 3-chlorine dioxide precursor solid tablet, 4-supporting net, 5-second valve, 6-reaction tank, 7-water injection hole, 8-water bath, 9-temperature controller, 10-air pump, 11-air sampling pipe, 12-wet air sampling pipe, 13-first valve.
Detailed Description
The invention is further described below with reference to specific figures and examples, without limiting the scope of the invention thereto.
The invention provides a device for stably releasing chlorine dioxide, which is shown in figure 1 and comprises a reactor and an air conveying device, wherein the reactor is a reaction tank 6 with an inverted cone-shaped opening at the upper part and a waste storage tank at the bottom, a supporting net 4 is arranged in the middle of the reaction tank, the supporting net 4 is provided with a through hole, a connecting sheet which is matched with the through hole and can be opened and closed is arranged on the through hole, a chlorine dioxide precursor solid tablet storage tank 1 is arranged at the upper end of the supporting net 4, the chlorine dioxide precursor solid tablet storage tank 1 is connected with the reaction tank 6 through a first valve and a downward-inclined pipeline 2, a second valve 5 which is airtight is arranged between the supporting net and the waste storage tank, and the aperture of the supporting net 4 is not more than that of the chlorine dioxide precursor solid tablet; the air conveying device comprises an air pump 10 and a water bath 8 provided with an air inlet and an air outlet, the air inlet is arranged above a water bath horizontal plane to be set, the air outlet is arranged at the top of the water bath, the air inlet is communicated with the air pump through an air sampling pipe 11, the air outlet is communicated with the reaction tank through a wet air sampling pipe 12, and the joint of the wet air sampling pipe 12 and the reaction tank 6 is arranged between the support net 4 and the second valve 5; the top of the water bath kettle is provided with a water injection hole 7 with a sealing cover, and the bottom is provided with a temperature controller 9.
The use method of the device for stably releasing chlorine dioxide shown in figure 1 comprises the following steps: firstly, water is injected into the water bath kettle through the water injection hole 7, the water level is not higher than an air inlet during water injection, then the supporting net 4 and the second valve 5 are tightly closed, the first valve is opened to enable part of chlorine dioxide precursor solid tablets to fall onto the supporting net 4 from the chlorine dioxide precursor solid tablet storage tank 1 through the pipeline 2, the first valve is closed, the air pump 10 is opened to enable wet air which passes through the water bath kettle and carries moisture to enter the reaction tank 6, and the wet air is in contact reaction with the chlorine dioxide precursor solid tablets through the supporting net holes to generate chlorine dioxide and flow out from an opening of the reactor. After the chlorine dioxide precursor solid tablet is failed, the air pump is closed, and the connecting sheet and the second valve on the supporting net are opened, so that the failed chlorine dioxide precursor solid tablet falls into a waste storage tank at the bottom of the reaction tank 6.
Further, the examples of the preparation method of the chlorine dioxide precursor solid tablet of the present invention are as follows:
example 1
Taking: 40 parts of sodium chlorite, 15 parts of citric acid, 5 parts of calcium chloride, 5 parts of 13X molecular sieve, 10 parts of polyethylene glycol, 10 parts of carboxymethyl cellulose and 25 parts of sodium sulfate. Drying at 100 deg.C to remove water, grinding and mixing in an environment with relative humidity less than 30%, and tabletting to obtain solid tablet of chlorine dioxide precursor with solid weight of 1 g.
The formed solid tablet is put into a chlorine dioxide precursor solid tablet storage tank 1 of the device, the flow of an air pump 10 is adjusted to be 500mL/min, and the temperature of water bath is accurately controlled to be 40 ℃. The released chlorine dioxide is measured by conventional spectrophotometric methods after absorption by water. The concentration of the released chlorine dioxide is 25-40mg/m 3 The release time can last for 10 days.
Example 2
Taking: 20 parts of sodium chlorite, 5 parts of malic acid, 10 parts of magnesium chloride, 10 parts of 13X molecular sieve, 10 parts of polyethylene glycol, 10 parts of carboxymethyl cellulose and 35 parts of sodium sulfate. Drying at 100 deg.C to remove water, grinding and mixing in an environment with relative humidity less than 30%, and tabletting to obtain solid tablet of chlorine dioxide precursor with solid weight of 1 g.
And (3) putting the formed solid tablet into a chlorine dioxide precursor solid tablet storage tank 1, adjusting the flow of an air pump 10 to be 500mL/min, and accurately controlling the water bath temperature to be 40 ℃. The released chlorine dioxide is measured by conventional spectrophotometric methods after absorption by water. The concentration of the released chlorine dioxide is 5-10mg/m 3 The release time can last for 15 days.
Example 3
Taking: 30 parts of sodium chlorite, 10 parts of sodium bisulfate, 5 parts of calcium chloride, 10 parts of 4A molecular sieve, 10 parts of gelatin, 10 parts of carboxymethyl cellulose and 25 parts of sodium sulfate. Drying at 100 deg.C to remove water, grinding and mixing in an environment with relative humidity less than 30%, and tabletting to obtain solid tablet of chlorine dioxide precursor with solid weight of 1 g.
The formed solid tablet is put into a chlorine dioxide precursor solid tablet storage tank 1 of the device, the flow of an air pump 10 is adjusted to be 500mL/min, and the temperature of water bath is accurately controlled to be 40 ℃. The released chlorine dioxide is measured by conventional spectrophotometric methods after absorption by water. The concentration of the released chlorine dioxide is 20-30mg/m 3 The release time can last for 10 days.
Example 4
Taking: 50 parts of sodium chlorite, 20 parts of tartaric acid, 5 parts of calcium chloride, 5 parts of a 4A molecular sieve, 5 parts of polyethylene glycol, 5 parts of carboxymethyl cellulose and 10 parts of magnesium sulfate. Drying at 100 deg.C to remove water, grinding and mixing in an environment with relative humidity less than 30%, and tabletting to obtain solid tablet of chlorine dioxide precursor with solid weight of 1 g.
The formed solid tablet is put into a chlorine dioxide precursor solid tablet storage tank 1 of the device, the flow of an air pump 10 is adjusted to be 500mL/min, and the temperature of water bath is accurately controlled to be 40 ℃. The released chlorine dioxide is measured by conventional spectrophotometric methods after absorption by water. The concentration of the released chlorine dioxide is 30-40mg/m 3 The release time can last for 8 days.
Example 5
Taking: 60 parts of sodium chlorite, 20 parts of citric acid, 2.5 parts of magnesium chloride, 2.5 parts of a 4A molecular sieve, 5 parts of polyethylene glycol, 5 parts of carboxymethyl cellulose and 5 parts of magnesium sulfate. Drying at 100 deg.C to remove water, grinding and mixing in an environment with relative humidity less than 30%, and tabletting to obtain solid tablet of chlorine dioxide precursor with solid weight of 1 g.
The formed solid tablet is put into a chlorine dioxide precursor solid tablet storage tank 1 of the device, the flow of an air pump 10 is adjusted to be 500mL/min, and the temperature of water bath is accurately controlled to be 40 ℃. Releasing dioxygenAfter the chlorine dioxide is absorbed by water, it is measured by conventional spectrophotometry. The concentration of the released chlorine dioxide is 40-50mg/m after measurement 3 The release time can last for 7 days.
Example 6
Taking: 70 parts of sodium chlorite, 20 parts of citric acid, 2 parts of calcium chloride, 2 parts of 4A molecular sieve, 2 parts of polyethylene glycol, 2 parts of carboxymethyl cellulose and 2 parts of sodium sulfate. Drying at 100 deg.C to remove water, grinding and mixing in an environment with relative humidity less than 30%, and tabletting to obtain solid tablet of chlorine dioxide precursor with solid weight of 1 g.
The formed solid tablet is put into a chlorine dioxide precursor solid tablet storage tank 1 of the device, the flow of an air pump 10 is adjusted to be 500mL/min, and the temperature of water bath is accurately controlled to be 40 ℃. The released chlorine dioxide is measured by conventional spectrophotometric methods after absorption by water. The concentration of the released chlorine dioxide is 100-150mg/m 3 The release time can last for 6 days.
Example 7
The solid tablet synthesized according to the example 1 is put into a chlorine dioxide precursor solid tablet storage tank 1 of the device, the flow of an air pump 10 is adjusted to be 500mL/min, and the temperature of a water bath is accurately controlled to be 60 ℃. The released chlorine dioxide is measured by conventional spectrophotometric methods after absorption by water. The concentration of the released chlorine dioxide is 15-25mg/m 3 The release time can last for 6 days.
Example 8
The solid tablet synthesized according to the example 1 is put into a chlorine dioxide precursor solid tablet storage tank 1 of the device, the flow of an air pump 10 is adjusted to be 500mL/min, and the water bath temperature is accurately controlled to be 80 ℃. The released chlorine dioxide is measured by conventional spectrophotometric methods after absorption by water. The concentration of the released chlorine dioxide is 80-120mg/m after measurement 3 The release time can last for 5 days.
Example 9
The solid tablet synthesized according to the example 1 is put into a chlorine dioxide precursor solid tablet storage tank 1 of the device of the invention, the flow of an air pump 10 is adjusted to 2000mL/min, and the temperature of a water bath is accurately controlled to 40 ℃. Release of chlorine dioxide throughAfter water absorption, measurements were made using conventional spectrophotometric methods. The concentration of the released chlorine dioxide is 20-40mg/m 3 The release time can last for 5 days.

Claims (10)

1. A chlorine dioxide release device, characterized in that: the chlorine dioxide release device comprises a reactor and an air conveying device, the reactor is a reaction tank (6) with an open upper part and a waste storage tank at the bottom, a support net (4) is arranged in the middle of the reaction tank, a chlorine dioxide precursor solid tablet storage tank (1) is arranged at the upper end of the support net (4), the chlorine dioxide precursor solid tablet storage tank (1) is connected with the reaction tank (6) through a first valve and a downward-inclined pipeline (2), a gas-tight second valve (5) is arranged between the support net and the waste storage tank, and the aperture of the support net (4) is not larger than that of the chlorine dioxide precursor solid tablet; air delivery device include air pump (10), be equipped with water bath (8) of air inlet and air outlet, air inlet establish in the top of waiting to establish the water bath horizontal plane, air outlet establish the top of water bath, air inlet advance appearance pipe (11) and air pump intercommunication through the air, air outlet advance appearance pipe (12) and retort intercommunication through humid air, humid air advance appearance pipe (12) and retort (6) junction establish between supporting network (4) and second valve (5).
2. A chlorine dioxide release device as defined in claim 1, wherein: the upper opening of the reactor is in the shape of an inverted cone.
3. A chlorine dioxide release device as defined in claim 1, wherein: the top of the water bath kettle is provided with a water injection hole (7) with a sealing cover.
4. A chlorine dioxide release device as defined in claim 1, wherein: the water bath is provided with a temperature controller (9).
5. A chlorine dioxide release device as defined in claim 1, wherein: the supporting net (4) is provided with a through hole, and the through hole is provided with a connecting sheet which is matched with the through hole and can be opened and closed.
6. Method for using a chlorine dioxide release device according to any one of claims 1 to 5, characterized in that the method is: firstly, water is injected into a water bath kettle, the water level is not higher than an air inlet when water is injected, then a supporting net (4) and a second valve (5) are tightly closed, the first valve is opened to enable part of chlorine dioxide precursor solid tablets to fall onto the supporting net (4) from a chlorine dioxide precursor solid tablet storage tank (1) through a pipeline (2), the first valve is closed, an air pump (10) is opened to enable wet air which passes through the water bath kettle and carries moisture to enter a reaction tank (6), and the wet air is in contact reaction with the chlorine dioxide precursor solid tablets through supporting meshes to generate chlorine dioxide and flow out from an opening of a reactor.
7. The method of using a chlorine dioxide release device as claimed in claim 6, characterized in that the method is: after the chlorine dioxide precursor solid tablet is failed, the air pump is closed, and the connecting sheet and the second valve on the supporting net are opened, so that the failed chlorine dioxide precursor solid tablet falls into a waste storage tank at the bottom of the reaction tank (6).
8. The method of using a chlorine dioxide releasing device according to claim 6, wherein said solid tablet of chlorine dioxide precursor is prepared by the following method: weighing 20-70 parts of sodium chlorite, 5-25 parts of activating agent, 2-10 parts of stabilizing agent, 2-10 parts of humectant, 2-10 parts of coating agent, 2-10 parts of forming agent and 2-35 parts of filling agent according to the weight ratio, drying to remove water, grinding and mixing in an environment with the relative humidity of less than 30%, and then pressing into a chlorine dioxide precursor solid tablet by using a tablet press; the activating agent is one or the mixture of more than two of citric acid, malic acid, tartaric acid, sodium hydrogen sulfate or sodium dihydrogen phosphate; the stabilizer is one or the mixture of more than two of anhydrous calcium salt, anhydrous magnesium salt or anhydrous sodium salt; the humectant is one or a mixture of more than two of 13X, 4A or 5A molecular sieves; the coating agent is polyethylene glycol or gelatin; the forming agent is one or a mixture of more than two of sodium carboxymethylcellulose, pregelatinized starch or acrylamide and sodium hexadecyl sulfonate; the filler is one or a mixture of more than two of sodium sulfate, magnesium sulfate and calcium carbonate.
9. A method of using a chlorine dioxide release device as claimed in claim 8, characterized in that: the stabilizer is one or the mixture of more than two of anhydrous calcium chloride, anhydrous magnesium chloride, anhydrous sodium sulfate, anhydrous sodium bisulfate or anhydrous magnesium sulfate.
10. A method of using a chlorine dioxide release device as claimed in claim 8, characterized in that: weighing 20-50 parts of sodium chlorite, 10-25 parts of activating agent, 5-10 parts of stabilizing agent, 3-6 parts of humectant, 5-10 parts of coating agent, 5-10 parts of forming agent and 2-35 parts of filling agent according to the weight ratio, drying to remove water, grinding and mixing in an environment with the relative humidity of less than 30%, and then pressing into a chlorine dioxide precursor solid tablet by using a tablet press; the activating agent is one or the mixture of more than two of citric acid, tartaric acid, sodium bisulfate and sodium dihydrogen phosphate; the stabilizer is one or the mixture of more than two of anhydrous calcium salt, anhydrous magnesium salt or anhydrous sodium salt; the humectant is one or a mixture of more than two of 13X, 4A or 5A molecular sieves; the coating agent is polyethylene glycol or gelatin; the forming agent is one or more than two of sodium carboxymethylcellulose, pregelatinized starch or acrylamide and sodium hexadecyl sulfonate, and the filling agent is one or more than two of sodium sulfate, magnesium sulfate or calcium carbonate.
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