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[Huicong Education Equipment Network] There are many types of chemical laboratories, which are divided into inorganic chemistry laboratory, organic chemistry laboratory, polymer chemistry laboratory, analytical chemistry laboratory and physical chemistry laboratory according to the experimental content. The common feature of these laboratories is that there are many kinds of chemicals. Most of them are inflammable and explosive materials, and some unknown materials of unknown nature; some articles can spontaneously ignite, and some of them are chemically resistant to each other; in experimental operations, often It is necessary to carry out operations such as distillation, reflux, extraction, electrolysis, etc., which have a high risk of fire, and there are many fires and electricity. Once the operation is wrong, it is easy to have a fire. The following fire protection measures should be taken for chemical laboratories:
(1) The chemical laboratory shall be a first-class, first-class and first-class fire-resistant building. The laboratory shall have a flammable and explosive vapor and a flammable gas. The electrical equipment shall comply with the explosion-proof requirements.
(2) There should be one or two safety exits when the construction area of ​​the laboratory is above 3 om^2.
(3) A small amount of flammable chemical dangerous goods remaining in the laboratory or commonly used in the laboratory. When the total amount does not exceed 5kg, it should be placed in a metal cabinet and kept by a special person. If it exceeds 5kg, it should not be stored in the laboratory.
(4) It is forbidden to use electric heating equipment without insulation and insulation base.
(5) Curtains must be provided in a room illuminated by sunlight; in places where sunlight is exposed, items that are subject to heat evaporation should not be placed.
(6) Materials with unknown or unknown experimental properties should be tested first, starting with the minimum amount, and taking safety measures to prepare for fire and explosion.
(7) In the course of the experiment, when using flammable gas as fuel, the installation and use of the equipment should meet the relevant fire safety requirements.
(8) Any chemical placed on the container must be labeled immediately. If any abnormality or in doubt is found, it should be checked or verified, or the custodian should be indiscriminately placed. Toxic items should be stored centrally or designated for personal care.
(9) Within the scope of the test bench, no chemicals should be placed that are not related to the experimental work, especially containers containing concentrated acid or flammable and explosive materials should not be placed.
(10) Anti-static measures should be taken when filling a large amount of flammable and flammable liquids (excluding electrolytes such as alcohol and acid) into the container.
(11) All kinds of gas cylinders used in laboratories should be kept away from fire sources, and should be placed in a cool outdoor place with air circulation. Hydrogen, oxygen and acetylene cannot be mixed in one place.
(12) The electrical lines for temporary use in the laboratory should meet the safety requirements. Electric heaters, electric ovens and other equipment should be disconnected. It is forbidden to store contradictory items and low flash points in the refrigerator. Burning liquid.
(13) Establish and improve the safety procedures and chemical storage rules for various chemical experiments such as distillation, reflux, extraction, and electrolysis, and educate students to strictly abide by them.
(14) Prepare for fire fighting and equip with light fire extinguishing equipment.
Instrument reference
EH series micro-controlled digital display hot plate
Dry heater
Programmable thermostat heater
Silicone heating belt
Conical flask heating jacket
Editor in charge: Chen Chao 12
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