CN111714667A - Environment-friendly multifunctional double-cavity ethylene oxide sterilizing cabinet - Google Patents
Environment-friendly multifunctional double-cavity ethylene oxide sterilizing cabinet Download PDFInfo
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- CN111714667A CN111714667A CN201910216239.5A CN201910216239A CN111714667A CN 111714667 A CN111714667 A CN 111714667A CN 201910216239 A CN201910216239 A CN 201910216239A CN 111714667 A CN111714667 A CN 111714667A
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- ethylene oxide
- sterilization
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- waste gas
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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
- A61L2/00—Methods or apparatus for disinfecting or sterilising materials or objects other than foodstuffs or contact lenses; Accessories therefor
- A61L2/16—Methods or apparatus for disinfecting or sterilising materials or objects other than foodstuffs or contact lenses; Accessories therefor using chemical substances
- A61L2/20—Gaseous substances, e.g. vapours
- A61L2/206—Ethylene oxide
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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
- A61L2/00—Methods or apparatus for disinfecting or sterilising materials or objects other than foodstuffs or contact lenses; Accessories therefor
- A61L2/26—Accessories or devices or components used for biocidal treatment
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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
- A61L2/00—Methods or apparatus for disinfecting or sterilising materials or objects other than foodstuffs or contact lenses; Accessories therefor
- A61L2/26—Accessories or devices or components used for biocidal treatment
- A61L2/28—Devices for testing the effectiveness or completeness of sterilisation, e.g. indicators which change colour
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/14—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols by absorption
- B01D53/1487—Removing organic compounds
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/14—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols by absorption
- B01D53/1493—Selection of liquid materials for use as absorbents
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2252/00—Absorbents, i.e. solvents and liquid materials for gas absorption
- B01D2252/10—Inorganic absorbents
- B01D2252/103—Water
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- Chemical & Material Sciences (AREA)
- Animal Behavior & Ethology (AREA)
- General Chemical & Material Sciences (AREA)
- Epidemiology (AREA)
- Life Sciences & Earth Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- General Health & Medical Sciences (AREA)
- Public Health (AREA)
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- Oil, Petroleum & Natural Gas (AREA)
- Apparatus For Disinfection Or Sterilisation (AREA)
Abstract
The invention relates to an environment-friendly multifunctional double-cavity ethylene oxide sterilizing cabinet, belonging to the technical field of the invention and an ethylene oxide sterilizing cabinet which is widely used in the fields of medical sterilization and the like, in particular to an environment-friendly multifunctional ethylene oxide sterilizing cabinet which has a double-cavity structure and can automatically treat ethylene oxide waste gas. In order to overcome the following defects of the prior ethylene oxide sterilizing cabinet: 1. one sterilization cabinet is only provided with one sterilization cavity without a forced analysis function system, and the analysis speed of the exhausted gas after sterilization is low; 2. the discharge of ethylene oxide waste gas after the sterilization of the sterilization cabinet can not meet the environmental protection requirement; 3. the device is not provided with a sterilization effect detection device. The technical scheme adopted by the invention for solving the technical problems is as follows: 1. two identical sterilization cavities are designed and used in the sterilization cabinet, and a set of forced analysis system is added. 2. A set of ethylene oxide waste gas treatment device is designed in an ethylene oxide sterilization cabinet system. 3. The invention designs a constant temperature (37 ℃) fungus tube incubator in the system. The main application is as follows: the use efficiency and the function of the sterilization cabinet are improved, and simultaneously, the environmental protection problem of the exhaust emission of the ethylene oxide sterilization cabinet is solved.
Description
Technical Field
The invention relates to an ethylene oxide sterilizing cabinet which is widely used in the fields of medical sterilization and the like, in particular to an environment-friendly and multifunctional ethylene oxide sterilizing cabinet which has a double-cavity structure and can automatically treat ethylene oxide waste gas.
Background
Ethylene oxide is a spectral sterilizing agent which can kill various microorganisms at normal temperature and can penetrate the package of medical instruments, and therefore, it is widely used as a sterilizing agent for medical instruments and is sterilized with ethylene oxide gas when used as a sterilizing agent. Ethylene oxide belongs to chemical hazardous articles, is flammable and explosive toxic gas, and is directly discharged to pollute the environment. The molecular formula of the ethylene oxide is C2H4O, the boiling point is 10.8 ℃, the specific gravity of the ethylene oxide gas is larger than that of air, the ethylene oxide has good hydrophilicity, the gas and the liquid are both easily dissolved in water, and can generate hydrolysis chemical reaction under certain conditions (such as under the action of a catalyst) to generate alcoholization reactions such as ethylene glycol, and the hydrolysis equation is as follows:
CH2CH2O+H2O＝HOCH2CH2OH
in the actual hydrolysis reaction, 98.3 percent of ethylene oxide is decomposed after hydrolysis reaction for 12 hours when acid which is added by one thousandth (volume ratio of concentrated sulfuric acid to ethylene oxide aqueous solution) is used at the temperature of more than 10 ℃ and the concentration of the ethylene oxide aqueous solution is less than or equal to 5000 mg/L.
Monitoring of sterilization effect of ethylene oxide sterilization cabinet bacillus subtilis biological indicator (bacterial tube or bacterial sheet) is widely used for culture monitoring in a constant temperature incubator at 37 ℃.
The ethylene oxide sterilizing cabinet is a necessary device for ethylene oxide sterilization, and is widely applied to the field of medical sterilization and the like, wherein an ethylene oxide sterilizing cycle is about 6 to 12 hours, the optimal sterilizing concentration of the ethylene oxide is between 600mg/L and 800mg/L, the optimal sterilizing temperature is about 54 ℃, and the sterilizing humidity is about 60 percent RH. At present, a sterilization cabinet of the existing ethylene oxide sterilization cabinet only has one sterilization cavity, and the sterilization and the analysis functions can not be simultaneously carried out. The ethylene oxide sterilized medical equipment product has certain ethylene oxide residue after sterilization, the ethylene oxide residue of the ethylene oxide sterilized medical equipment product can be safely used only by being less than 10ug/g according to the requirements of the national pharmacopoeia on the ethylene oxide sterilized medical equipment, the exhaust gas after the sterilization of the ethylene oxide sterilization cabinet at present is subjected to exhaust analysis by adopting a mode of extracting ethylene oxide waste gas in the sterilization cabinet by using the negative pressure of a vacuum pump, the analysis efficiency is low, and the ethylene oxide residue of the sterilized product obtained after the analysis is far more than tens of times or even hundreds of times of the safe use standard of 10ug/g, so that the ethylene oxide residue of the sterilized product is far more than the safe use standard of 10 ug/g. At present, medical equipment products sterilized by the ethylene oxide sterilizing cabinet can be used only by forced analysis or natural analysis for more than one week. The optimum desorption temperature of the ethylene oxide sterilization product is generally about 40-60 ℃, and the forced desorption is to carry out forced ventilation on the ethylene oxide sterilization product under the condition of keeping the proper temperature of the ethylene oxide sterilization product about 40-60 ℃, so that the ethylene oxide residue in the sterilization product can be quickly volatilized and released; the ethylene oxide waste gas after the sterilization of the existing ethylene oxide sterilization cabinet is directly discharged to the atmosphere or discharged after being dissolved in water, and in order to meet the environmental protection requirement of the discharge of the ethylene oxide sterilization waste gas, a set of ethylene oxide waste gas treatment system device is additionally added in the existing ethylene oxide sterilization cabinet; when the sterilization effect of the existing ethylene oxide sterilization cabinet is detected, the existing ethylene oxide sterilization cabinet takes out a bacillus subtilis tube or a bacillus slice which is put in a sterilization product and then sends the bacillus subtilis tube or the bacillus slice to a laboratory for culture detection.
Disclosure of Invention
In order to overcome the following defects of the prior ethylene oxide sterilizing cabinet:
1. one sterilization cabinet is only provided with one sterilization cavity without a forced analysis function system, and the analysis speed of the exhausted gas after sterilization is low;
2. the discharge of ethylene oxide waste gas after the sterilization of the sterilization cabinet can not meet the environmental protection requirement;
3. the device is not provided with a sterilization effect detection device.
The invention provides an environment-friendly multifunctional double-cavity ethylene oxide sterilizing cabinet, which is characterized in that:
1. the sterilization cabinet has a double-cavity structure, namely two sterilization cavities are arranged, a set of forced analysis system is added, the forced analysis system adopts a positive pressure mode that a medium pressure fan blows air into the sterilization cabinet for analysis, and the two sterilization cavities have sterilization and forced analysis functions;
2. the sterilizing cabinet is provided with an ethylene oxide waste gas treatment device, the treatment device consists of an ethylene oxide waste gas water-dissolving system and an ethylene oxide water-solution hydrolyzing system, and the ethylene oxide waste gas treated by the device is converted into water and glycol so that harmful substances of ethylene oxide are not discharged after the sterilization;
3. the sterilization cabinet is also provided with a constant temperature incubator at 37 ℃, and bacillus subtilis tubes can be cultured to monitor the ethylene oxide sterilization effect.
The technical scheme adopted by the invention for solving the technical problems is as follows:
1. two identical sterilization cavities are designed and used in a sterilization cabinet, a set of forced analysis system is added, the two sterilization cavities share one sterilization system and one analysis system, the two cavities are controlled by a computer program to be sterilized and used simultaneously, one cavity is sterilized, the other cavity is analyzed, and the sterilization is not delayed. Meanwhile, the invention adds a set of forced analysis system, which comprises: the medium-pressure fan, the computer control program and the ventilation pipeline controlled by the computer control program. The analysis mode of the forced analysis system is different from the negative pressure analysis mode of the prior ethylene oxide sterilization cabinet which adopts a vacuum pump to extract waste gas in the sterilization cabinet after sterilization, but adopts a computer-controlled positive pressure intermittent exhaust analysis mode, namely, the mode of analyzing the waste gas exhausted by the prior ethylene oxide sterilization cabinet by adopting the negative pressure of the vacuum pump to exhaust air is changed into the positive pressure exhaust analysis mode of blowing air into the sterilization cabinet by a medium pressure fan, namely, the air exhaust mode is changed into the air blowing mode, and the exhaust volume of the medium pressure fan is more than ten times of the exhaust volume of the vacuum pump under the same power, so the exhaust efficiency of the invention is more than ten times of the exhaust efficiency of the prior ethylene oxide sterilization cabinet. The intermittent type is that the medium-pressure fan exhausts the waste gas of the sterilization cabinet for a certain time, then the exhaust is stopped, and the exhaust is performed after the residual waste gas of ethylene oxide is volatilized by the sterilized articles in the cabinet, so as to save energy consumption, generally, ten minutes are exhausted, ten minutes are stopped, and the intermittent analysis is performed in a reciprocating manner, so that the optimal analysis effect is achieved.
2. An ethylene oxide waste gas treatment device is designed in an ethylene oxide sterilization cabinet system, the device consists of an ethylene oxide gas water-soluble system and an ethylene oxide aqueous solution chemical decomposition system, the ethylene oxide gas water-soluble system consists of a plurality of water-soluble spray tower devices which are connected in series, ethylene oxide can be dissolved in water by water mist when sterilized ethylene oxide waste gas passes through each water-soluble spray tower in sequence, the ethylene oxide waste gas is dissolved in the water by the water of the water-soluble spray towers and flows into a hydrolysis reaction tank, the hydrolysis reaction tank is a main device of the ethylene oxide aqueous solution chemical decomposition system, the volume of the hydrolysis reaction tank is designed to be about equal to or more than 1/5, so as to ensure that the concentration of ethylene oxide hydrolysis after each sterilization is below 5000mg/L, a sulfuric acid tank and a sulfuric acid inflow control device are also designed on the hydrolysis reaction tank, so as to ensure that the volume ratio of the sulfuric acid catalyst added each time is controlled to be one thousandth of that of the ethylene oxide aqueous solution, and the ethylene oxide discharged by the sterilizing cabinet each time reaches a proper dissolved concentration so as to achieve the optimal ethylene oxide waste gas decomposition effect.
3. According to the invention, a constant-temperature (37 ℃) bacteria tube incubator is designed in the system, and after the sterilization of the sterilization cabinet is finished, the sterilized bacillus subtilis spore biological indicator (bacteria tube) is taken out and put into the constant-temperature (37 ℃) bacteria tube incubator for cultivation, and the ethylene oxide sterilization effect of the batch can be detected within 48 hours.
The invention has the beneficial effects that:
the use efficiency and the function of the sterilization cabinet are improved, and simultaneously, the environmental protection problem of the exhaust emission of the ethylene oxide sterilization cabinet is solved.
1. The invention has the advantages that the unique double-cavity design has the effect that one device can resist two devices for use, and simultaneously has the function of forced analysis, and moreover, the invention greatly improves the exhaust efficiency of the sterilization waste gas, thereby greatly reducing the residual quantity of ethylene oxide of the sterilized articles.
2. The invention has an ethylene oxide waste gas treatment system, so that the sterilized ethylene oxide waste gas is hydrolyzed into ethylene glycol, and the problem that the waste gas emission of the existing ethylene oxide sterilization cabinet can not meet the environmental protection requirement is solved.
3. The invention also provides a fungus tube incubator with a constant temperature of 37 ℃, which is convenient for detecting the sterilization effect of the sterilization cabinet.
The invention is further illustrated with reference to the following figures and examples.
Description of the drawings:
FIG. 1 is a schematic diagram of the system structure of the present invention, wherein in FIG. 1, 1 is a computer and a dashboard; 2, sterilizing double cavities; 3 is a humidifier; 4 is a desorption gas outlet pipeline; 5 is an ethylene oxide gas water-soluble system; 6 is an exhaust port; 7 is a check valve; (ii) a 8 is a vacuum pump; 9 is a sulfuric acid constant control device; 10 is a water level control valve; 11 is a hydrolysis reaction tank; 12 is a drain valve; 13 is a resolving intake duct; 14 is a constant temperature (37 ℃) mushroom tube incubator; 15 is a storage box; 16 is a medium pressure analyzing fan; and 17 is an air pump. K1, K2, K3, K4 and K5 are all pneumatic ball valves controlled by a computer program.
The specific implementation mode is as follows: when the sterilization cabinet is used for sterilization, sterilization and analysis parameters are set on a computer screen on a computer instrument panel 1 in advance, one sterilization cavity is freely selected from a sterilization double-cavity 2 for sterilization, and a door is closed and a sterilization program is started after sterilization articles are loaded. After a sterilization program is started, preheating and heating are firstly carried out, after a set temperature parameter value (generally about 54 ℃) is reached, a constant temperature is carried out for a period of time (generally about 30 minutes), if the humidity is not enough, a humidifier is started 3 for humidification, then, a vacuum pump evacuates a cavity, after a vacuum set value (generally about-40 to-60 Kpa) is reached, pressure is maintained for a certain time (generally about ten minutes), automatic administration of ethylene oxide is carried out without leakage, the administration is finished and enters a sterilization state, after the sterilization is finished (generally the sterilization time is set to be 6 to 8 hours), an analysis program is started, an analysis pipeline control valve corresponding to the cavity is opened by using the sterilization program of the cavity, and a 16 medium-pressure analysis fan analyzes the cavity. During analysis, ethylene oxide waste gas discharged from the sterilization cavity is dissolved into water through an ethylene oxide gas 5 water-soluble system and flows into the hydrolysis reaction tank 11, and meanwhile, a sulfuric acid constant control device 9 is switched on to put a sulfuric acid catalyst into the hydrolysis reaction tank 11 to decompose ethylene oxide in an ethylene oxide water solution. After the analysis, the sterilized article was taken out, and the tube placed in the sterilized article was put into a tube incubator at a constant temperature of 14 ℃ at 37 ℃ for culture to examine the sterilization effect. In the analysis process, if the general analysis time is short, if the low-residue forced analysis is required, the sterilized articles need to be analyzed for 4-12 hours, so that another sterilization cavity can be started at any time for sterilization during the forced analysis, and the normal sterilization work of the sterilization cabinet is not influenced.
Claims (4)
1. An environment-friendly double-cavity ethylene oxide sterilization cabinet is characterized in that the sterilization cabinet has a double-cavity structure, namely, two sterilization cavities are arranged.
2. The sterilization cabinet of claim 1 is characterized in that a set of forced analysis system is added, and the forced analysis system adopts a positive pressure mode that a medium pressure fan blows air into the sterilization cabinet for analysis.
3. The environment-friendly double-cavity ethylene oxide sterilizing cabinet is characterized in that the sterilizing cabinet is provided with an ethylene oxide waste gas treatment device, the treatment device consists of an ethylene oxide waste gas water solution system and an ethylene oxide water solution hydrolysis system, and the ethylene oxide waste gas treated by the treatment device is converted into water and ethylene glycol.
4. A sterilizer as claimed in claim 1, wherein the sterilizer itself is provided with a 37 ℃ incubator in which the tubes of Bacillus subtilis can be incubated to monitor the ethylene oxide sterilization.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910216239.5A CN111714667A (en) | 2019-03-21 | 2019-03-21 | Environment-friendly multifunctional double-cavity ethylene oxide sterilizing cabinet |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910216239.5A CN111714667A (en) | 2019-03-21 | 2019-03-21 | Environment-friendly multifunctional double-cavity ethylene oxide sterilizing cabinet |
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| Publication Number | Publication Date |
|---|---|
| CN111714667A true CN111714667A (en) | 2020-09-29 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910216239.5A Pending CN111714667A (en) | 2019-03-21 | 2019-03-21 | Environment-friendly multifunctional double-cavity ethylene oxide sterilizing cabinet |
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Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20040253156A1 (en) * | 2001-08-15 | 2004-12-16 | Werner Stahlecker | Machine system for sterilising and filling containers |
| CN103800926A (en) * | 2013-12-17 | 2014-05-21 | 杨亮月 | Ethylene oxide sterilizing and exhaust gas zero-emission treatment system |
| CN203749877U (en) * | 2013-12-17 | 2014-08-06 | 杨亮月 | Ethylene oxide sterilization and exhaust gas zero-emission treatment system |
| CN203750389U (en) * | 2013-12-17 | 2014-08-06 | 杨亮月 | Ethylene oxide sterilization waste gas treatment device |
| CN204655398U (en) * | 2015-05-25 | 2015-09-23 | 刘道菲 | Medical treatment and nursing utensil moves sterilization storage device |
| CN106139199A (en) * | 2015-04-24 | 2016-11-23 | 南通华尔康医疗科技股份有限公司 | A kind of method and device quickly carrying out oxirane parsing |
-
2019
- 2019-03-21 CN CN201910216239.5A patent/CN111714667A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20040253156A1 (en) * | 2001-08-15 | 2004-12-16 | Werner Stahlecker | Machine system for sterilising and filling containers |
| CN103800926A (en) * | 2013-12-17 | 2014-05-21 | 杨亮月 | Ethylene oxide sterilizing and exhaust gas zero-emission treatment system |
| CN203749877U (en) * | 2013-12-17 | 2014-08-06 | 杨亮月 | Ethylene oxide sterilization and exhaust gas zero-emission treatment system |
| CN203750389U (en) * | 2013-12-17 | 2014-08-06 | 杨亮月 | Ethylene oxide sterilization waste gas treatment device |
| CN106139199A (en) * | 2015-04-24 | 2016-11-23 | 南通华尔康医疗科技股份有限公司 | A kind of method and device quickly carrying out oxirane parsing |
| CN204655398U (en) * | 2015-05-25 | 2015-09-23 | 刘道菲 | Medical treatment and nursing utensil moves sterilization storage device |
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Application publication date: 20200929 |