Henan Bibo Tongchuang Water Purification Materials Co

Our unit specializes in the production of quartz sand filter material: quartz sand is processed using the most advanced quartz ore processing equipment in the country, including crushing, screening, washing and other processes. The biggest feature of machine-made quartz sand filter material is that it has edges and corners, low density and low resistance. Great filtering effect. At present, domestic quartz sand filter materials are either natural or machine-processed. Its material varies due to different geographical distribution, but as a quartz sand filter material for water supply treatment, its material must meet the following requirements: ① Have sufficient mechanical strength ② Have sufficient chemical stability ③ Cannot produce harmful substances to human health and production ④The density of quartz sand filter material must reach a certain value.

The selection should be based on local materials as much as possible, with sufficient supply and low price. In the Ministry of Construction Standard C? of the People's Republic of China, the technical requirements and inspection methods of quartz sand filter media are elaborated. When choosing according to these requirements and regulations, the author believes that there are still certain shortcomings. This is reflected in the control of the particle gradation of the filter material. According to regulations: among the quartz sand filter materials in various particle size ranges, those smaller than the specified lower limit particle size should not be larger than the specified upper limit particle size, and those larger than the specified upper limit particle size should not be larger than the quartz sand filter material. The effective particle size and non-uniformity coefficient of the filter material are determined by the user unit.

However, during the screening and inspection of quartz sand filter materials, it was found that the quartz sand filter materials provided by many suppliers did meet the standard requirements, but there were gaps in the particle size distribution, that is, in the control Within the particle size range, there are few or almost no particles in a certain small range. The reason is that the supplier has extracted a certain small range of pellets and supplied them elsewhere. Due to the existence of faults, the reasonable distribution of particles in the filter material layer is destroyed, and the filtration cycle is shortened accordingly. During backwashing, the backwash space where the fault particles are located is wasted. Therefore, when controlling the quartz sand filter material in a certain particle size range, it is necessary not only to control its effective particle size and uneven coefficient, but also to control its The number ratio of each particle size within the particle size range. Only by meeting these requirements at the same time, the selection of quartz sand filter material of a certain material is the most reasonable.

2. Maintain good filtration effect of the machine-made quartz sand filter material. In water plants that use one-time chlorine disinfection after filtration, after the filter has been running for a period of time, the filter material particles will be contaminated by mud, organic matter, Wrapped by microorganisms and reducing substances. Since the wrapping layer is soft, sticky, and flocculent, the porosity of the filter material is greatly reduced, which in turn worsens the filtering conditions. This wrapping layer on the surface of the filter material is difficult to remove by backwashing. To remove it, generally The method is: stop the operation of the filter, then add liquid chlorine or bleaching powder multiple times, and perform relevant operations and controls until the wrapping is digested. Of course, in severe cases, hydrochloric acid or sulfuric acid treatment can be used. These methods are very effective in quickly restoring the filtration effect of the filter. However, the control of the dosage, the dosage method, and the safety during dosage will undoubtedly give the operator more advice. High requirements.

Seeing these troubles, the author believes that it is more reasonable, convenient and feasible to use the method of adding chlorine before filtering to deal with the above filter materials. With this method, the chlorine addition point is required to be in front of the sedimentation tank or in the suction well of the first-level pump room. This can not only fully sterilize, but also improve the coagulation and sedimentation efficiency, prevent the sludge at the bottom of the sedimentation tank from rotting and smelling, and prevent the filter from being Moss grows on the walls of the sedimentation tank, and at the same time the coating on the surface of the filter material is digested. This method causes the three r-substances in the filtered water to increase rapidly in a short period of time and cause odor. In order to prevent such water quality from entering the storage tank, it is advisable to install a granular carbon (C) filter layer at the outlet pipe of the filtered distribution tank to ensure the quality of the water entering the storage tank. This kind of treatment requires a moderate dosage of liquid chlorine. In this way, the coating on the surface of the filter material can be removed in about ten days and the filtration effect can be restored. In some water purification plants, frequent replacement of filter media without this treatment will inevitably lead to waste.

3. Reasonable addition mechanism After the quartz sand filter filter has been running for a period of time, the gradation of the filter material will inevitably change due to wear and tear. At the same time, the fine particles are easily carried away by the backwash flow. When walking, it is easy to enter the clean water channel with the filtered water flow, so the filter material is reduced. The laboratory technician of the water plant should regularly check the changes in the filter material layer of the filter during operation. According to the remaining amount of filter material in the filter and the particle size distribution of the filter material in the existing filter layer, add a certain particle size and gradation of filter material. filter material. Of course, since the small particle filter material expands more during backwashing, the damage rate of the small particle filter material is higher, and accordingly the loss rate of the small particle filter material is higher. Therefore, under normal circumstances, only the surface section is added. Filter material, but when replacing the surface section filter material, it is not advisable to use filter materials with controlled particle size range and gradation during design. Instead, it is better to use filter materials in a small range above the lower limit of the control range. This is especially true when adding filter materials. should be noted.

Our factory's purpose is to empathize with each other, work heart-to-heart with users, and make users feel at ease. Produced and packaged according to customer needs, the products are sold to customers at factory prices. Our factory is responsible for delivering the goods to the customer's designated location to ensure continuous and stable provision of satisfactory products and services to users.
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Henan Bibo Tongchuang Water Purification Materials Co., Ltd. is a professional manufacturer dedicated to the distribution of water treatment products. We will uphold the tenet of users first and integrity first, rely on reliable product quality and flexible business methods, and welcome friends from all walks of life to visit us. ...... Company website: < /:/c/c/]@)B />< /C:/r/~c@C(CB. />:.cc/Contact number: Contact: