CN111659046A - Protective mask - Google Patents
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- CN111659046A CN111659046A CN202010539663.6A CN202010539663A CN111659046A CN 111659046 A CN111659046 A CN 111659046A CN 202010539663 A CN202010539663 A CN 202010539663A CN 111659046 A CN111659046 A CN 111659046A
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- A—HUMAN NECESSITIES
- A62—LIFE-SAVING; FIRE-FIGHTING
- A62B—DEVICES, APPARATUS OR METHODS FOR LIFE-SAVING
- A62B9/00—Component parts for respiratory or breathing apparatus
- A62B9/06—Mouthpieces; Nose-clips
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- A—HUMAN NECESSITIES
- A41—WEARING APPAREL
- A41D—OUTERWEAR; PROTECTIVE GARMENTS; ACCESSORIES
- A41D13/00—Professional, industrial or sporting protective garments, e.g. surgeons' gowns or garments protecting against blows or punches
- A41D13/05—Professional, industrial or sporting protective garments, e.g. surgeons' gowns or garments protecting against blows or punches protecting only a particular body part
- A41D13/11—Protective face masks, e.g. for surgical use, or for use in foul atmospheres
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- A—HUMAN NECESSITIES
- A41—WEARING APPAREL
- A41D—OUTERWEAR; PROTECTIVE GARMENTS; ACCESSORIES
- A41D31/00—Materials specially adapted for outerwear
- A41D31/04—Materials specially adapted for outerwear characterised by special function or use
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- A—HUMAN NECESSITIES
- A62—LIFE-SAVING; FIRE-FIGHTING
- A62B—DEVICES, APPARATUS OR METHODS FOR LIFE-SAVING
- A62B23/00—Filters for breathing-protection purposes
- A62B23/02—Filters for breathing-protection purposes for respirators
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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
- B01D53/02—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 adsorption, e.g. preparative gas chromatography
- B01D53/04—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 adsorption, e.g. preparative gas chromatography with stationary adsorbents
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J20/00—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof
- B01J20/02—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof comprising inorganic material
- B01J20/20—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof comprising inorganic material comprising free carbon; comprising carbon obtained by carbonising processes
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- A—HUMAN NECESSITIES
- A41—WEARING APPAREL
- A41D—OUTERWEAR; PROTECTIVE GARMENTS; ACCESSORIES
- A41D2400/00—Functions or special features of garments
- A41D2400/36—Deoderising or perfuming
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2257/00—Components to be removed
- B01D2257/30—Sulfur compounds
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2257/00—Components to be removed
- B01D2257/30—Sulfur compounds
- B01D2257/304—Hydrogen sulfide
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2257/00—Components to be removed
- B01D2257/30—Sulfur compounds
- B01D2257/306—Organic sulfur compounds, e.g. mercaptans
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2257/00—Components to be removed
- B01D2257/40—Nitrogen compounds
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2257/00—Components to be removed
- B01D2257/40—Nitrogen compounds
- B01D2257/406—Ammonia
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2257/00—Components to be removed
- B01D2257/70—Organic compounds not provided for in groups B01D2257/00 - B01D2257/602
- B01D2257/702—Hydrocarbons
Abstract
The invention discloses a protective mask, which comprises: an outer non-woven fabric layer, a middle non-woven fabric layer, a melt-blown fabric layer and an inner non-woven fabric layer; the outer non-woven fabric layer is arranged on one side of the middle non-woven fabric layer, and the outer non-woven fabric layer and the middle non-woven fabric layer are connected at local positions to form an independent carbon containing cavity; filling odor removal active carbon in the carbon containing cavity; and the inner non-woven fabric layer is arranged on the other side of the middle non-woven fabric layer, and the melt-blown fabric layer is arranged between the inner non-woven fabric layer and the middle non-woven fabric layer. The protective mask can filter out malodorous substances, can be used in special environments such as medical places, refuse landfills, sewage treatment plants, livestock farms, chemical plants and the like, improves the breathing feeling of users, and is suitable for the users who enter the places or work in the places for a long time.
Description
Technical Field
The invention belongs to the technical field of particle and microorganism protection and purification equipment and tools, and particularly relates to a protective mask.
Background
The mask is a sanitary article, and is generally worn on the mouth and nose for filtering air entering the mouth and nose so as to achieve the effect of blocking harmful gas, smell, spray, virus and other substances. The mask has a certain filtering function on air entering the lung, and has a very good effect when being worn in respiratory infectious diseases and working in environments polluted by dust and the like.
In particular environments such as medical facilities, refuse landfills, sewage treatment plants, livestock farms, chemical plants, and the like, there is an unpleasant odor caused by sulfur-containing gas, and it is necessary to provide special protection for personnel who enter the above-mentioned places or who have worked in the above-mentioned places for a long time.
The Chinese patent with the application publication number of CN109043700A provides a disposable odor-removing traditional Chinese medicine mask, which comprises a mask body and a hanging belt; the mask body is bag-shaped, two sides of the mask body are provided with containing openings communicated with the inner cavity of the mask body, and the end parts of the hanging belts extend into the inner cavity of the mask body through the containing openings; be provided with the medicine bag in the gauze mask body inner chamber, be provided with the tear mark on the bag body of medicine bag, its inside splendid attire has the air freshener, and the air freshener includes the component of following parts by mass: 0-20 parts of lemon oil, 0-20 parts of mint oil, 0-20 parts of cardamom volatile oil, 0-20 parts of fingered citron volatile oil, 0-20 parts of angelica dahurica volatile oil and 0-20 parts of schizonepeta volatile oil; the ends of the hanging belts are fixedly connected with the two sides of the medicine bag. The mask can reduce the problem of bad subjective feeling of the user on the bad smell in the specific environment. However, since the action principle is to mix the odor of the volatile component with the ambient air by utilizing the volatilization of the volatile odor component, thereby masking unpleasant odor in the ambient air, the types of the ambient air components entering the respiratory tract of the user are increased, but the original source of the unpleasant odor is not removed.
Disclosure of Invention
The invention aims to provide a protective mask to solve the problem that a user inhales unpleasant gas in a specific environment.
The technical scheme for solving the technical problems is as follows: a protective mask, comprising: an outer non-woven fabric layer, a middle non-woven fabric layer, a melt-blown fabric layer and an inner non-woven fabric layer; the outer non-woven fabric layer is arranged on one side of the middle non-woven fabric layer, and the outer non-woven fabric layer and the middle non-woven fabric layer are connected at local positions to form an independent carbon containing cavity; filling odor removal active carbon in the carbon containing cavity; the inner non-woven fabric layer is arranged on the other side of the middle non-woven fabric layer, and the melt-blown fabric layer is arranged between the inner non-woven fabric layer and the middle non-woven fabric layer;
the odor removal active carbon is prepared by the following method:
drying the raw materials for making the charcoal, crushing and sieving the dried raw materials to 40-80 meshes; mixing the raw material for making charcoal with 0.5-2 times of pretreatment agent by weight, heating to 62-74 ℃, and stirring for 30-60 minutes; then heating to 120-150 ℃ under the protection of nitrogen, standing for 60-120 minutes, and cooling to room temperature to obtain a primary carbon raw material; the pretreating agent is a mixture of sodium borohydride, 2-methylpropanoic acid, methyl 2-methylpropionate and chitosan;
preferably, the raw materials for making the charcoal are one, two or more of rice hulls, peanut shells, cotton shells, corn stalks, sorghum stalks, bean stalks, sawdust and coconut shells.
Preferably, the pretreating agent is prepared from the following components in parts by weight: 12-18 parts of sodium borohydride, 20-36 parts of 2-methylpropanoic acid, 50-68 parts of methyl 2-methylpropionate and 8-10 parts of chitosan.
More preferably, the pretreating agent is formulated in the following parts by weight: sodium borohydride 15, 2-methylpropionic acid 30, methyl 2-methylpropionate 60 and chitosan 9.
Preferably, in the step 1, the carbon-making raw material is mixed with 0.5-2 times of the weight of the pretreating agent, the temperature is raised to 70 ℃, and the stirring is carried out for 50 minutes.
Preferably, in step 1, the temperature is raised to 140 ℃ under the protection of nitrogen, and the mixture is left for 100 minutes.
Adding the primary carbon raw material into a muffle furnace, heating to 560-580 ℃ under the protection of nitrogen, keeping for 100-120 minutes, and cooling to room temperature to obtain a secondary carbon raw material;
preferably, in the step 2, the primary carbon raw material is added into a muffle furnace, and is heated to 570-580 ℃ under the protection of nitrogen, and is kept for 100-120 minutes.
Preferably, in step 2, the primary carbon raw material is added into a muffle furnace, and is heated to 570 ℃ under the protection of nitrogen for 120 minutes.
And step three, repeatedly washing the secondary carbon raw material by using deionized water until the secondary carbon raw material is neutral, and drying the secondary carbon raw material in drying equipment until the temperature is raised to 50-60 ℃ until no water exists, thereby preparing the odor removal activated carbon.
The protective mask can realize the protection of odorous substances (hydrogen sulfide (H)2S), methyl mercaptan (CH)3SH), thiodimethyl ether ((CH)3)2S), dimethyldisulfide ((CH)3)2S2) Carbon disulfide (CS)2) Ammonia (NH)3) Trimethylamine ((CH)3)3N), styrene (AR-CH ═ CH2) Filtered, can be used in special environments such as medical places, refuse landfills, sewage treatment plants, livestock farms, chemical plants, and the like, improves the breathing feeling of users, and is suitable for people who enter the places or work in the places for a long time. Compared with the commercial activated carbon product, the odor removing activated carbon used in the protective mask has better filtering and removing effects on the following odor gases, wherein the hydrogen sulfide concentration reduction rate is greater than or equal to 52%, the methyl mercaptan concentration reduction rate is greater than or equal to 47%, the ammonia gas concentration reduction rate is greater than or equal to 59%, and the styrene concentration reduction rate is greater than or equal to 37%, so that the odor removing activated carbon has better use experience when used in an actual severe environment, and unpleasant gases are prevented from entering nostrils of a user.
Drawings
The above and/or other advantages of the invention will become more apparent and more readily appreciated from the following detailed description taken in conjunction with the accompanying drawings, which are given by way of illustration only and not by way of limitation, and in which:
FIG. 1 is a schematic view of an outer nonwoven layer and a middle nonwoven layer according to one embodiment of the present invention;
FIG. 2 is a schematic view of the connection of the outer nonwoven layer and the middle nonwoven layer according to one embodiment of the present invention;
FIG. 3 is a schematic view of a carbon containing chamber according to an embodiment of the present invention;
fig. 4 is a schematic view of the malodorous gas concentration reduction rate measurement apparatus.
In the drawings, the components represented by the respective reference numerals are listed below:
1. the device comprises an external non-woven fabric layer, a middle non-woven fabric layer 2, a connecting part 3, a carbon containing cavity 4, a malodorous gas concentration reduction rate measuring device 5, an air source storage tank 51, an air guide pipe 52, an air guide pipe 53, an exhaust gas storage tank 54, a piston 55, a threaded sealing joint 56, a carbon filter sheet 57, a gas sampling port 58 and a gas outlet.
Detailed Description
Hereinafter, an embodiment of the protective mask of the present invention will be described with reference to the accompanying drawings.
The examples described herein are specific embodiments of the present invention, are intended to be illustrative and exemplary in nature, and are not to be construed as limiting the scope of the invention. In addition to the embodiments described herein, those skilled in the art will be able to employ other technical solutions which are obvious based on the disclosure of the claims and the specification of the present application, and these technical solutions include technical solutions which make any obvious replacement or modification for the embodiments described herein.
The drawings in the present specification are schematic views to assist in explaining the concept of the present invention, and schematically show the shapes of respective portions and their mutual relationships. It is noted that the drawings are not necessarily to the same scale so as to clearly illustrate the structures of the various elements of the embodiments of the invention. Like reference numerals are used to denote like parts.
The embodiment of the invention provides a protective mask, which comprises: an outer non-woven fabric layer 1, a middle non-woven fabric layer 2, a melt-blown fabric layer and an inner non-woven fabric layer; as shown in fig. 1 to fig. 3, the outer non-woven fabric layer is disposed on one side of the middle non-woven fabric layer, and the outer non-woven fabric layer and the middle non-woven fabric layer are connected at a local position to form an independent carbon containing cavity 4; filling odor removal active carbon in the carbon containing cavity; and the inner non-woven fabric layer is arranged on the other side of the middle non-woven fabric layer, and the melt-blown fabric layer is arranged between the inner non-woven fabric layer and the middle non-woven fabric layer. The outer nonwoven fabric layer 1 and the middle nonwoven fabric layer 2 are preferably bonded by thermocompression bonding to form the connecting portion 3, which has an advantage of simple production. The thickness of the odor removal active carbon in the carbon containing cavity is preferably 1 mm-10 mm.
The deodorizing active carbon is prepared by the following method:
drying the raw materials for making the charcoal, crushing and sieving the dried raw materials to 40-80 meshes; mixing the raw material for making charcoal with 0.5-2 times of pretreatment agent by weight, heating to 62-74 ℃, and stirring for 30-60 minutes; then heating to 120-150 ℃ under the protection of nitrogen, standing for 60-120 minutes, and cooling to room temperature to obtain a primary carbon raw material; the pretreating agent is a mixture of sodium borohydride, 2-methylpropanoic acid, methyl 2-methylpropionate and chitosan;
preferably, the raw materials for making the charcoal are one, two or more of rice hulls, peanut shells, cotton shells, corn stalks, sorghum stalks, bean stalks, sawdust and coconut shells.
Preferably, the pretreating agent is prepared from the following components in parts by weight: 12-18 parts of sodium borohydride, 20-36 parts of 2-methylpropanoic acid, 50-68 parts of methyl 2-methylpropionate and 8-10 parts of chitosan.
More preferably, the pretreating agent is formulated in the following parts by weight: sodium borohydride 15, 2-methylpropionic acid 30, methyl 2-methylpropionate 60 and chitosan 9.
Preferably, in the step 1, the carbon-making raw material is mixed with 0.5-2 times of the weight of the pretreating agent, the temperature is raised to 70 ℃, and the stirring is carried out for 50 minutes.
Preferably, in step 1, the temperature is raised to 140 ℃ under the protection of nitrogen, and the mixture is left for 100 minutes.
Adding the primary carbon raw material into a muffle furnace, heating to 560-580 ℃ under the protection of nitrogen, keeping for 100-120 minutes, and cooling to room temperature to obtain a secondary carbon raw material;
preferably, in the step 2, the primary carbon raw material is added into a muffle furnace, and is heated to 570-580 ℃ under the protection of nitrogen, and is kept for 100-120 minutes.
Preferably, in step 2, the primary carbon raw material is added into a muffle furnace, and is heated to 570 ℃ under the protection of nitrogen for 120 minutes.
And step three, repeatedly washing the secondary carbon raw material by using deionized water until the secondary carbon raw material is neutral, and drying the secondary carbon raw material in drying equipment until the temperature is raised to 50-60 ℃ until no water exists, thereby preparing the odor removal activated carbon.
In the following examples: sodium borohydride, Nantong Hongzhi chemical Co., Ltd., sodium borohydride content is not less than 98.0 wt. 2-methyl propionic acid, Shandonghao Shunhua chemical Co., Ltd., content is not less than 99.5% wt. Methyl 2-methylpropionate, Zhengzhou Jex chemical products Co., Ltd., and the content of methyl 2-methylpropionate is not less than 98.0 wt. Chitosan, Yulong Yuxiang biotechnology Limited, Hebei, in an amount of greater than or equal to 99.5% wt.
Comparative examples description of activated carbon: wood chip activated carbon, wood powder type i pharmaceutical grade activated carbon of baume activated carbon marketing limited in Shijiazhuang; shell activated carbon, Jiangsu Zhuxi sawdust activated carbon, Inc. ZX 102; coconut shell activated carbon, Jiangsu Zhuxi sawdust activated carbon, ZX 100.
Preparation of deodorizing activated carbon example 1
Drying rice hulls, crushing and sieving the dried rice hulls to 40-80 meshes; mixing the raw material for making the charcoal with 0.5 times of pretreatment agent by weight, heating to 62 ℃, and stirring for 60 minutes; then heating to 120 ℃ under the protection of nitrogen, standing for 120 minutes, and cooling to room temperature to obtain a primary carbon raw material; the pretreating agent is a mixture consisting of 12 parts by weight of sodium borohydride, 36 parts by weight of 2-methylpropanoic acid, 50 parts by weight of methyl 2-methylpropionate and 10 parts by weight of chitosan;
adding the primary carbon raw material into a muffle furnace, heating to 560 ℃ under the protection of nitrogen, keeping the temperature for 120 minutes, and cooling to room temperature to obtain a secondary carbon raw material;
and step three, repeatedly washing the secondary carbon raw material by using deionized water until the secondary carbon raw material is neutral, heating the secondary carbon raw material to 60 ℃ in drying equipment until the secondary carbon raw material is anhydrous, and preparing the deodorant active carbon.
Preparation of deodorizing activated carbon example 2
Drying corn stalks, crushing and sieving the corn stalks to 40-80 meshes; mixing the raw material for making the charcoal with a pretreating agent with the weight 2 times that of the raw material for making the charcoal, heating the mixture to 74 ℃, and stirring the mixture for 30 minutes; then heating to 150 ℃ under the protection of nitrogen, standing for 60 minutes, and cooling to room temperature to obtain a primary carbon raw material; the pretreating agent is a mixture consisting of 18 parts by weight of sodium borohydride, 20 parts by weight of 2-methylpropanoic acid, 68 parts by weight of methyl 2-methylpropionate and 8 parts by weight of chitosan;
adding the primary carbon raw material into a muffle furnace, heating to 580 ℃ under the protection of nitrogen, keeping the temperature for 100 minutes, and cooling to room temperature to obtain a secondary carbon raw material;
and step three, repeatedly washing the secondary carbon raw material by using deionized water until the secondary carbon raw material is neutral, heating the secondary carbon raw material to 50 ℃ in drying equipment until the secondary carbon raw material is anhydrous, and preparing the odor removal activated carbon.
Preparation of deodorizing activated carbon example 3
Drying the bean stalks, crushing and sieving the dried bean stalks to 40-80 meshes; mixing the raw material for making the carbon with a pretreating agent with the weight of 1 time, heating to 70 ℃, and stirring for 50 minutes; then heating to 140 ℃ under the protection of nitrogen, standing for 100 minutes, and cooling to room temperature to obtain a primary carbon raw material; the pretreating agent is a mixture consisting of 15 parts by weight of sodium borohydride, 30 parts by weight of 2-methylpropanoic acid, 60 parts by weight of methyl 2-methylpropionate and 9 parts by weight of chitosan;
adding the primary carbon raw material into a muffle furnace, heating to 575 ℃ under the protection of nitrogen, keeping the temperature for 120 minutes, and cooling to room temperature to obtain a secondary carbon raw material;
and step three, repeatedly washing the secondary carbon raw material by using deionized water until the secondary carbon raw material is neutral, heating the secondary carbon raw material to 55 ℃ in drying equipment until the secondary carbon raw material is anhydrous, and preparing the odor removal activated carbon.
Preparation of deodorizing activated carbon example 4
Drying sawdust, crushing and sieving to 40-80 meshes; mixing the raw material for making the charcoal with a pretreatment agent with the weight of 1 time, heating to 62 ℃, and stirring for 50 minutes; then heating to 140 ℃ under the protection of nitrogen, standing for 110 minutes, and cooling to room temperature to obtain a primary carbon raw material; the pretreating agent is a mixture consisting of 12 parts by weight of sodium borohydride, 20 parts by weight of 2-methylpropanoic acid, 68 parts by weight of methyl 2-methylpropionate and 10 parts by weight of chitosan;
adding the primary carbon raw material into a muffle furnace, heating to 570 ℃ under the protection of nitrogen, keeping the temperature for 120 minutes, and cooling to room temperature to obtain a secondary carbon raw material;
and step three, repeatedly washing the secondary carbon raw material by using deionized water until the secondary carbon raw material is neutral, heating the secondary carbon raw material to 60 ℃ in drying equipment until the secondary carbon raw material is anhydrous, and preparing the deodorant active carbon.
Preparation of deodorizing activated carbon example 5
Step one, drying coconut shells, crushing and sieving the dried coconut shells to 40-80 meshes; mixing the raw material for making the charcoal with a pretreating agent which is 1.8 times the weight of the raw material for making the charcoal, heating the mixture to 68 ℃, and stirring the mixture for 50 minutes; then heating to 140 ℃ under the protection of nitrogen, standing for 80 minutes, and cooling to room temperature to obtain a primary carbon raw material; the pretreating agent is a mixture consisting of 18 parts by weight of sodium borohydride, 36 parts by weight of 2-methylpropanoic acid, 68 parts by weight of methyl 2-methylpropionate and 10 parts by weight of chitosan;
adding the primary carbon raw material into a muffle furnace, heating to 580 ℃ under the protection of nitrogen, keeping the temperature for 100 minutes, and cooling to room temperature to obtain a secondary carbon raw material;
and step three, repeatedly washing the secondary carbon raw material by using deionized water until the secondary carbon raw material is neutral, heating the secondary carbon raw material to 50 ℃ in drying equipment until the secondary carbon raw material is anhydrous, and preparing the odor removal activated carbon.
Preparation of deodorizing activated carbon example 6
Drying rice hulls, crushing and sieving the dried rice hulls to 40-80 meshes; mixing the raw material for making the carbon with a pretreating agent with the weight of 1 time, heating to 70 ℃, and stirring for 50 minutes; then heating to 140 ℃ under the protection of nitrogen, standing for 100 minutes, and cooling to room temperature to obtain a primary carbon raw material; the pretreating agent is a mixture consisting of 15 parts by weight of sodium borohydride, 30 parts by weight of 2-methylpropanoic acid, 60 parts by weight of methyl 2-methylpropionate and 9 parts by weight of chitosan;
adding the primary carbon raw material into a muffle furnace, heating to 575 ℃ under the protection of nitrogen, keeping the temperature for 120 minutes, and cooling to room temperature to obtain a secondary carbon raw material;
and step three, repeatedly washing the secondary carbon raw material by using deionized water until the secondary carbon raw material is neutral, heating the secondary carbon raw material to 55 ℃ in drying equipment until the secondary carbon raw material is anhydrous, and preparing the odor removal activated carbon.
Preparation of deodorizing activated carbon example 7
Drying corn stalks, crushing and sieving the corn stalks to 40-80 meshes; mixing the raw material for making the carbon with a pretreating agent with the weight of 1 time, heating to 70 ℃, and stirring for 50 minutes; then heating to 140 ℃ under the protection of nitrogen, standing for 100 minutes, and cooling to room temperature to obtain a primary carbon raw material; the pretreating agent is a mixture consisting of 15 parts by weight of sodium borohydride, 30 parts by weight of 2-methylpropanoic acid, 60 parts by weight of methyl 2-methylpropionate and 9 parts by weight of chitosan;
adding the primary carbon raw material into a muffle furnace, heating to 575 ℃ under the protection of nitrogen, keeping the temperature for 120 minutes, and cooling to room temperature to obtain a secondary carbon raw material;
and step three, repeatedly washing the secondary carbon raw material by using deionized water until the secondary carbon raw material is neutral, heating the secondary carbon raw material to 55 ℃ in drying equipment until the secondary carbon raw material is anhydrous, and preparing the odor removal activated carbon.
Preparation of deodorizing activated carbon example 8
Drying sawdust, crushing and sieving to 40-80 meshes; mixing the raw material for making the carbon with a pretreating agent with the weight of 1 time, heating to 70 ℃, and stirring for 50 minutes; then heating to 140 ℃ under the protection of nitrogen, standing for 100 minutes, and cooling to room temperature to obtain a primary carbon raw material; the pretreating agent is a mixture consisting of 15 parts by weight of sodium borohydride, 30 parts by weight of 2-methylpropanoic acid, 60 parts by weight of methyl 2-methylpropionate and 9 parts by weight of chitosan;
adding the primary carbon raw material into a muffle furnace, heating to 575 ℃ under the protection of nitrogen, keeping the temperature for 120 minutes, and cooling to room temperature to obtain a secondary carbon raw material;
and step three, repeatedly washing the secondary carbon raw material by using deionized water until the secondary carbon raw material is neutral, heating the secondary carbon raw material to 55 ℃ in drying equipment until the secondary carbon raw material is anhydrous, and preparing the odor removal activated carbon.
Preparation of deodorizing activated carbon example 9
Step one, drying coconut shells, crushing and sieving the dried coconut shells to 40-80 meshes; mixing the raw material for making the carbon with a pretreating agent with the weight of 1 time, heating to 70 ℃, and stirring for 50 minutes; then heating to 140 ℃ under the protection of nitrogen, standing for 100 minutes, and cooling to room temperature to obtain a primary carbon raw material; the pretreating agent is a mixture consisting of 15 parts by weight of sodium borohydride, 30 parts by weight of 2-methylpropanoic acid, 60 parts by weight of methyl 2-methylpropionate and 9 parts by weight of chitosan;
adding the primary carbon raw material into a muffle furnace, heating to 575 ℃ under the protection of nitrogen, keeping the temperature for 120 minutes, and cooling to room temperature to obtain a secondary carbon raw material;
and step three, repeatedly washing the secondary carbon raw material by using deionized water until the secondary carbon raw material is neutral, heating the secondary carbon raw material to 55 ℃ in drying equipment until the secondary carbon raw material is anhydrous, and preparing the odor removal activated carbon.
Preparation of deodorizing activated carbon example 10
Step one, drying coconut shells, crushing and sieving the dried coconut shells to 40-80 meshes; mixing the raw material for making the carbon with a pretreating agent with the weight of 1 time, heating to 70 ℃, and stirring for 50 minutes; then heating to 140 ℃ under the protection of nitrogen, standing for 100 minutes, and cooling to room temperature to obtain a primary carbon raw material; the pretreating agent is a mixture consisting of 30 parts by weight of 2-methylpropanoic acid, 60 parts by weight of methyl 2-methylpropionate and 9 parts by weight of chitosan;
adding the primary carbon raw material into a muffle furnace, heating to 575 ℃ under the protection of nitrogen, keeping the temperature for 120 minutes, and cooling to room temperature to obtain a secondary carbon raw material;
and step three, repeatedly washing the secondary carbon raw material by using deionized water until the secondary carbon raw material is neutral, heating the secondary carbon raw material to 55 ℃ in drying equipment until the secondary carbon raw material is anhydrous, and preparing the odor removal activated carbon.
Preparation of deodorizing activated carbon example 11
Step one, drying coconut shells, crushing and sieving the dried coconut shells to 40-80 meshes; mixing the raw material for making the carbon with a pretreating agent with the weight of 1 time, heating to 70 ℃, and stirring for 50 minutes; then heating to 140 ℃ under the protection of nitrogen, standing for 100 minutes, and cooling to room temperature to obtain a primary carbon raw material; the pretreating agent is a mixture consisting of 15 parts by weight of sodium borohydride, 60 parts by weight of methyl 2-methylpropionate and 9 parts by weight of chitosan;
adding the primary carbon raw material into a muffle furnace, heating to 575 ℃ under the protection of nitrogen, keeping the temperature for 120 minutes, and cooling to room temperature to obtain a secondary carbon raw material;
and step three, repeatedly washing the secondary carbon raw material by using deionized water until the secondary carbon raw material is neutral, heating the secondary carbon raw material to 55 ℃ in drying equipment until the secondary carbon raw material is anhydrous, and preparing the odor removal activated carbon.
Preparation of deodorizing activated carbon example 12
Step one, drying coconut shells, crushing and sieving the dried coconut shells to 40-80 meshes; mixing the raw material for making the carbon with a pretreating agent with the weight of 1 time, heating to 70 ℃, and stirring for 50 minutes; then heating to 140 ℃ under the protection of nitrogen, standing for 100 minutes, and cooling to room temperature to obtain a primary carbon raw material; the pretreating agent is a mixture consisting of 15 parts by weight of sodium borohydride, 30 parts by weight of 2-methylpropanoic acid and 9 parts by weight of chitosan;
adding the primary carbon raw material into a muffle furnace, heating to 575 ℃ under the protection of nitrogen, keeping the temperature for 120 minutes, and cooling to room temperature to obtain a secondary carbon raw material;
and step three, repeatedly washing the secondary carbon raw material by using deionized water until the secondary carbon raw material is neutral, heating the secondary carbon raw material to 55 ℃ in drying equipment until the secondary carbon raw material is anhydrous, and preparing the odor removal activated carbon.
Preparation of deodorizing activated carbon example 13
Step one, drying coconut shells, crushing and sieving the dried coconut shells to 40-80 meshes; mixing the raw material for making the carbon with a pretreating agent with the weight of 1 time, heating to 70 ℃, and stirring for 50 minutes; then heating to 140 ℃ under the protection of nitrogen, standing for 100 minutes, and cooling to room temperature to obtain a primary carbon raw material; the pretreating agent is a mixture consisting of 15 parts by weight of sodium borohydride, 30 parts by weight of 2-methylpropanoic acid and 9 parts by weight of chitosan;
adding the primary carbon raw material into a muffle furnace, heating to 575 ℃ under the protection of nitrogen, keeping the temperature for 120 minutes, and cooling to room temperature to obtain a secondary carbon raw material;
and step three, repeatedly washing the secondary carbon raw material by using deionized water until the secondary carbon raw material is neutral, heating the secondary carbon raw material to 55 ℃ in drying equipment until the secondary carbon raw material is anhydrous, and preparing the odor removal activated carbon.
Preparation of deodorizing activated carbon example 14
Step one, drying coconut shells, crushing and sieving the dried coconut shells to 40-80 meshes; mixing the raw material for making the carbon with a pretreating agent with the weight of 1 time, heating to 70 ℃, and stirring for 50 minutes; then heating to 140 ℃ under the protection of nitrogen, standing for 100 minutes, and cooling to room temperature to obtain a primary carbon raw material; the pretreating agent is a mixture consisting of 15 parts by weight of sodium borohydride, 30 parts by weight of hydrochloric acid, 60 parts by weight of methyl 2-methylpropionate and 9 parts by weight of chitosan;
adding the primary carbon raw material into a muffle furnace, heating to 575 ℃ under the protection of nitrogen, keeping the temperature for 120 minutes, and cooling to room temperature to obtain a secondary carbon raw material;
and step three, repeatedly washing the secondary carbon raw material by using deionized water until the secondary carbon raw material is neutral, heating the secondary carbon raw material to 55 ℃ in drying equipment until the secondary carbon raw material is anhydrous, and preparing the odor removal activated carbon.
Preparation of deodorizing activated carbon example 15
Step one, drying coconut shells, crushing and sieving the dried coconut shells to 40-80 meshes; mixing the raw material for making the carbon with a pretreating agent with the weight of 1 time, heating to 70 ℃, and stirring for 50 minutes; then heating to 140 ℃ under the protection of nitrogen, standing for 100 minutes, and cooling to room temperature to obtain a primary carbon raw material; the pretreating agent is a mixture consisting of 15 parts by weight of sodium borohydride, 30 parts by weight of 2-methylpropanoic acid, 60 parts by weight of methyl 2-methylpropionate and 9 parts by weight of chitosan;
adding the primary carbon raw material into a muffle furnace, heating to 500 ℃ under the protection of nitrogen, keeping the temperature for 200 minutes, and cooling to room temperature to obtain a secondary carbon raw material;
and step three, repeatedly washing the secondary carbon raw material by using deionized water until the secondary carbon raw material is neutral, heating the secondary carbon raw material to 55 ℃ in drying equipment until the secondary carbon raw material is anhydrous, and preparing the odor removal activated carbon.
Preparation of odor removing activated carbon example 16
Step one, drying coconut shells, crushing and sieving the dried coconut shells to 40-80 meshes; mixing the raw material for making the carbon with a pretreating agent with the weight of 1 time, heating to 70 ℃, and stirring for 50 minutes; then heating to 140 ℃ under the protection of nitrogen, standing for 100 minutes, and cooling to room temperature to obtain a primary carbon raw material; the pretreating agent is a mixture consisting of 15 parts by weight of sodium borohydride, 30 parts by weight of 2-methylpropanoic acid, 60 parts by weight of methyl 2-methylpropionate and 9 parts by weight of chitosan;
adding the primary carbon raw material into a muffle furnace, heating to 600 ℃ under the protection of nitrogen, keeping the temperature for 80 minutes, and cooling to room temperature to obtain a secondary carbon raw material;
and step three, repeatedly washing the secondary carbon raw material by using deionized water until the secondary carbon raw material is neutral, heating the secondary carbon raw material to 55 ℃ in drying equipment until the secondary carbon raw material is anhydrous, and preparing the odor removal activated carbon.
Referring to fig. 4, there is shown a malodorous gas concentration reduction rate measurement device 5 comprising a gas source storage tank 51 in which a piston 54 is disposed and which is provided with a threaded sealing joint 55 for sealing connection with a gas conduit 52; the other end of the gas guide pipe is communicated to a waste gas storage tank 53 with a gas outlet 58; the gas-guide tube 52 is provided with a gas sampling port for sampling, and is in a closed state in a non-sampling state; the carbon filter 56 is composed of a filter screen and odor removal active carbon wrapped in two layers of non-woven fabrics, and the filter screen has a supporting function. The thickness of the odor removal active carbon in the two layers of non-woven fabrics is 5 mm.
The 'foul odor pollutant emission standard' stipulates 8 kinds of foul odor substances to be controlled, namely hydrogen sulfide (H)2S), methyl mercaptan (CH)3SH), thiodimethyl ether ((CH)3)2S), dimethyldisulfide ((CH)3)2S2) Carbon disulfide (CS)2) Ammonia (NH)3) Trimethylamine ((CH)3)3N), styrene (AR-CH ═ CH2). 5 of the above eight malodorous pollutants are sulfur-containing substances. The invention selects the typical object in 4 to test.Preparing experimental sample gas, namely respectively filling gases with original concentrations of 20ppm hydrogen sulfide, 10ppm methyl mercaptan, 50ppm ammonia gas and 26ppm styrene into a gas source storage tank 51, and labeling the outside of the gas source storage tanks of different gases for later use; the capacity of the air source storage tank is 20L.
Detect and the sample process, when carrying out certain foul gas concentration reduction rate and survey, will correspond air supply storage tank 51 and be connected to the tip of air duct 52 through thread sealing joint 55, promote piston 54 exhaust the inside gaseous back of air duct 52, installation charcoal filter 56, then slowly promote the piston 10 seconds after through setting up the sample that carries out gas at the gas sampling mouth 57 of air duct 52, then utilize gas chromatograph to carry out gas concentration and detect. The exhaust gas enters the exhaust gas storage tank 53 and is discharged to the atmosphere through the gas outlet 58. The sampled gas was subjected to post-experiment concentration detection using a GC Smart (GC-2018) Shimadzu gas chromatograph.
The malodorous gas concentration reduction rate is obtained by the following equation.
The malodorous gas concentration reduction rate ═ original concentration-concentration after experiment/original concentration ] × 100
Charcoal filter sheets were prepared from the deodorizing activated carbon prepared in examples 1 to 16, and the wood chip activated carbon, the nut shell activated carbon, and the coconut shell activated carbon, respectively, and a malodorous gas concentration reduction rate measurement experiment was performed according to the above-described procedure, and the results are shown in table 1.
TABLE 1 reduction ratio (%) of malodorous gas concentration of different gases
Through the embodiment and the verification data, compared with the commercial activated carbon product, the odor removing activated carbon used in the protective mask has better filtering and removing effects on the following odor gases, namely the hydrogen sulfide concentration reduction rate is greater than or equal to 52%, the methyl mercaptan concentration reduction rate is greater than or equal to 47%, the ammonia concentration reduction rate is greater than or equal to 59%, and the styrene concentration reduction rate is greater than or equal to 37%, so that the odor removing activated carbon has better use experience when used in an actual severe environment, and unpleasant gases are prevented from entering nostrils of a user.
The technical features disclosed above are not limited to the combinations with other features disclosed, and other combinations between the technical features can be performed by those skilled in the art according to the purpose of the invention, so as to achieve the purpose of the invention.
Claims (8)
1. A protective mask, comprising: an outer non-woven fabric layer, a middle non-woven fabric layer, a melt-blown fabric layer and an inner non-woven fabric layer; the outer non-woven fabric layer is arranged on one side of the middle non-woven fabric layer, and the outer non-woven fabric layer and the middle non-woven fabric layer are connected at local positions to form an independent carbon containing cavity; filling odor removal active carbon in the carbon containing cavity; the inner non-woven fabric layer is arranged on the other side of the middle non-woven fabric layer, and the melt-blown fabric layer is arranged between the inner non-woven fabric layer and the middle non-woven fabric layer;
the odor removal active carbon is prepared by the following method:
drying the raw materials for making the charcoal, crushing and sieving the dried raw materials to 40-80 meshes; mixing the raw material for making charcoal with 0.5-2 times of pretreatment agent by weight, heating to 62-74 ℃, and stirring for 30-60 minutes; then heating to 120-150 ℃ under the protection of nitrogen, standing for 60-120 minutes, and cooling to room temperature to obtain a primary carbon raw material; the pretreating agent is a mixture of sodium borohydride, 2-methylpropanoic acid, methyl 2-methylpropionate and chitosan;
adding the primary carbon raw material into a muffle furnace, heating to 560-580 ℃ under the protection of nitrogen, keeping for 100-120 minutes, and cooling to room temperature to obtain a secondary carbon raw material;
and step three, repeatedly washing the secondary carbon raw material by using deionized water until the secondary carbon raw material is neutral, and drying the secondary carbon raw material in drying equipment until the temperature is raised to 50-60 ℃ until no water exists, thereby preparing the odor removal activated carbon.
2. The protective mask according to claim 1, wherein the raw material for making charcoal is one, two or more of rice husk, peanut shell, cotton shell, corn stalk, sorghum stalk, bean stalk, sawdust and coconut shell.
3. The protective mask according to claim 1, wherein the pretreatment agent is formulated in the following parts by weight: 12-18 parts of sodium borohydride, 20-36 parts of 2-methylpropanoic acid, 50-68 parts of methyl 2-methylpropionate and 8-10 parts of chitosan.
4. The protective mask according to claim 1, wherein the pretreatment agent is formulated in the following parts by weight: sodium borohydride 15, 2-methylpropionic acid 30, methyl 2-methylpropionate 60 and chitosan 9.
5. The protective mask according to claim 1, wherein in step 1, the raw material for making charcoal is mixed with 0.5 to 2 times by weight of a pretreating agent, heated to 70 ℃, and stirred for 50 minutes.
6. The protective mask according to claim 1, wherein in step 1, the temperature is raised to 140 ℃ under the protection of nitrogen gas, and the mask is left standing for 100 minutes.
7. The protective mask according to claim 1, wherein in the step 2, the primary carbon raw material is added into a muffle furnace, and the temperature is raised to 570-580 ℃ under the protection of nitrogen, and the temperature is maintained for 100-120 minutes.
8. The protective mask of claim 1 wherein in step 2, the primary carbon feedstock is added to a muffle furnace and heated to 570 ℃ under nitrogen protection for 120 minutes.
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