干粉滅火系統設計的七個注意事項
來源：http://www.xintli.net/ 日期：2023-02-18
（一）干粉滅火系統按應用方式可分為全淹沒滅火系統和局部應用滅火系統。撲救封閉空間內的火災應采用全淹沒滅火系統；撲救具體保護對象的火災應采用局部應用滅火系統。
（1） Dry powder fire extinguishing system can be divided into total flooding fire extinguishing system and local application fire extinguishing system according to application mode. The total flooding fire extinguishing system shall be used to put out the fire in the enclosed space; Local application fire extinguishing system shall be adopted to put out the fire of specific protected objects.
（二）采用全淹沒滅火系統的防護區，
川消小編認為應符合下列規定：
（2） For the protection zone using the total flooding fire extinguishing system, the small editor of Sichuan Fire Fighting believes that the following requirements should be met:
（1）噴放干粉時不能自動關閉的防護區開口，其總面積不應大于該防護區總內表面積的15％，且開口不應設在底面。
(1) The total area of the protective zone opening that cannot be automatically closed when spraying dry powder shall not be greater than 15% of the total internal surface area of the protective zone, and the opening shall not be set at the bottom.
（2）防護區的圍護結構及門、窗的耐火極限不應小于0.50h，吊頂的耐火極限不應小于0.25h；圍護結構及門、窗的允許壓力不宜小于1200Pa。
(2) The fire endurance of the enclosure, doors and windows in the protection zone shall not be less than 0.50h, and the fire endurance of the ceiling shall not be less than 0.25h; The allowable pressure of the enclosure, doors and windows should not be less than 1200Pa.
（三）采用局部應用滅火系統的保護對象，應符合下列規定：
（3） The protected objects using local application fire extinguishing system shall meet the following requirements:
（1）保護對象周圍的空氣流動速度不宜大于2m/s。必要時，應采取擋風措施。
(1) The air flow velocity around the protected object should not be greater than 2m/s. If necessary, wind protection measures shall be taken.
（2）在噴頭和保護對象之間，噴頭噴射角范圍內不應有遮擋物。
(2) Between the nozzle and the protected object, there should be no obstructions within the spray angle range of the nozzle.
（3）當保護對象為可燃液體時，液面容器緣口的距離不得小于150mm。
(3) When the protection object is flammable liquid, the distance from the liquid level to the edge of the container shall not be less than 150 mm.
（四）當防護區或保護對象有可燃氣體，易燃、可燃液體供應源時，啟動干粉滅火系統之前或同時，必須切斷氣體、液體的供應源。
（4） When there are flammable gas, flammable and combustible liquid supply sources in the protection area or the protection object, the gas and liquid supply sources must be cut off before or at the same time when the dry powder fire extinguishing system is started.
（五）可燃氣體，易燃、可燃液體和可熔化固體火災宜采用碳酸氫鈉干粉滅火劑；可燃固體表面火災應采用磷酸銨鹽干粉滅火劑。
（5） Sodium bicarbonate dry powder fire extinguishing agent should be used for combustible gas, flammable, combustible liquid and fusible solid fire; Ammonium phosphate dry powder extinguishing agent shall be used for combustible solid surface fire.
（六）組合分配系統的滅火劑儲存量不應小于所需儲存量多的一個防護區或保護對象的儲存量。
（6） The storage capacity of fire extinguishing agent in the combined distribution system shall not be less than the storage capacity of a protective area or protected object with more storage capacity.
（七）組合分配系統保護的防護區與保護對象之和不得超過8個。當防護區與保護對象之和超過5個時，或者在噴放后48h內不能恢復到正常工作狀態時，滅火劑應有備用量。備用量不應小于系統設計的儲存量。備用量的儲存容器應與系統管網相連，并能與主用干粉儲存容器切換使用。更多相關內容就來我們網站
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（7） The sum of protection zones and protection objects protected by the combined distribution system shall not exceed 8. When the sum of the protected area and the protected object exceeds 5, or the fire extinguishing agent cannot be restored to the normal working state within 48 hours after the spraying, the fire extinguishing agent shall have a reserve amount. The reserve capacity shall not be less than the storage capacity designed by the system. The storage container for standby quantity shall be connected with the system pipe network and can be switched to the main dry powder storage container. Come to our website for more relevant content http://www.xintli.net Ask!
