What should we do when the fire water pump cannot meet the full self-priming water absorption requirement?

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This post was last edited by Li Rongguo on 2020-12-11 09:26 In fire protection design, since the municipal water supply pipe network usually cannot meet the water volume and pressure requirements for indoor fire protection, most residential buildings and industrial enterprises need to build fire pump rooms and fire pools. Especially in industrial design, it is often encountered that industrial enterprises renovate and expand their factories, resulting in the existing fire water pumps being unable to meet the fire protection requirements of the second phase of the building, including fire water volume or fire water pressure, and the existing fire water pumps being unable to meet the full self-priming and water absorption requirements. Therefore, such renovation and expansion projects often require redesign, drawing review, and replacement of existing water pumps in accordance with existing fire regulations. However, in the original design of the project, it was often based on old specifications and standards, and it was difficult for fire pumps to meet the new standards in the current specification "Technical Specifications for Fire Water Supply and Fire Hydrant Systems" (GB50974-2014) that require fire water pumps to be self-priming throughout the process, that is, the minimum effective water level of a vertical fire pump should be higher than the first-stage impeller of the pump, and the lowest limited water level of a horizontal pump should be higher than the exhaust hole of the pump. In previous designs, a large proportion of fire water pumps could only achieve self-priming pump start-up, but could not achieve full self-priming. Especially in some petrochemical projects, due to the large effective volume of the pool and the high investment cost of the pool's civil construction, most of the designs are half-above-ground fire-fighting pools and full-above-ground fire-fighting pump rooms, or full-underground fire-fighting pools and half-above-ground fire-fighting pump rooms. Nowadays, the promulgation of new fire regulations has caused headaches for owners who are actively expanding production. On the one hand, there may be other ancillary equipment in the fire pump room, such as production pumps, domestic pumps, etc., which can affect the whole body and greatly affect the normal production of the factory and the lives of employees. On the other hand, if an underground fire pump house is required according to the current specifications, not only will the civil construction investment cost be high, the construction period will be long, and excavation will be difficult, but it will also easily damage the original structure of the pump house and fire pool, and the fire protection renovation cost will be extremely high. So for this situation, is there an economical, simple and feasible fire protection renovation plan? It is best to have a solution that requires no changes to civil engineering, has a short construction period, complies with current fire protection regulations, and meets fire protection acceptance requirements. The answer is yes. Since the disadvantages caused by the need to build underground pump rooms for ordinary fire pumps are becoming more and more obvious, our company followed the trend and successfully developed a self-priming installation solution for synchronous discharge and suction fire pumps, which avoided the disadvantages of building underground pump rooms. It is very popular in the market because of its simplicity, convenience, and low overall budget. Moreover, this equipment is a pump designated by fire regulations and has passed the * * The mandatory inspection of the Fixed Fire Extinguishing System and Fire-Resistant Components Quality Supervision and Inspection Center (i.e. Tianxiao Institute) also has the CCCF certification of the Fire Products Conformity Assessment Center of the Ministry of Emergency Management, so it must be compulsorily recognized anywhere in the country. So how to implement fire protection transformation using synchronous discharge and suction fire pumps? Option 1: Half-ground fire pool, full-ground fire pump room, laminated synchronous discharge and suction fire pump self-priming installation plan 2: All-underground fire pool, all-above-ground fire pump room, jet flow, synchronous discharge and suction fire pump, self-priming installation solution. The above two solutions are the simplest working conditions and relatively simple solutions. For working conditions that cannot meet the requirements of full self-irrigation, we will make a plan that best suits the site based on comprehensive factors such as the area of ​​the on-site pump room, the flow head parameters of the fire water pump, the horizontal distance between the fire pool and the fire pump room, the depth of the fire pool, one fire pool or two fire pools, single pipe single suction or shared main pipe, electric fire pump or diesel fire pump. At the same time, synchronous discharge and suction fire pumps include not only electric motor fire pumps but also diesel engine fire pumps, not only vertical fire pumps, but also horizontal fire pumps. Basically, our company can provide practical solutions for all sites that cannot meet the self-irrigation requirements. For information such as working principles, product samples, etc., if teachers and leaders are interested, you can search "Synchronous Discharge and Suction Fire Pump" on WeChat and follow the public account, or search the "Synchronous Discharge and Suction Fire Pump" Post Bar on Baidu Post Bar. For some extremely harsh working conditions, I can arrange relevant technical personnel to help provide solutions! I very much hope to have the opportunity to discuss cooperation with all teachers and leaders. Please refer to the above points for review, and please correct me if there are any shortcomings.