Softening device of raw water circulation fluidized-suspension bed

Abstract

The invention discloses a softening device of a raw water circulation fluidized-suspension bed. The softening device is characterized in that a cyclone clarifier main body consists of three sections of cylinders; a tank body is wrapped at the periphery of the cyclone clarifier main body; a precipitation device is arranged between the tank body and the cyclone clarifier main body, and is communicated with an upper cylinder of the cyclone clarifier main body by a water delivery pipeline; a water delivery pipeline extending into the precipitation device is communicated with a water distributing pipe; an outer sand-collecting hopper is arranged outside an inner sand-collecting hopper at a certain gap; the outer sand-collecting hopper is communicated with the precipitation device; a crystal nucleus conveying pipeline is communicated between an offset pipe and the outer sand-collecting hopper at the bottom of the precipitation device, and is provided with a delivery pump; and a softened water output pipe opening is arranged on the upper part of the tank body. In the softening device, the filtering speed is high, the product is sand grains, the dewatering is easy, artificial crystal nucleus does not need to be added, the filtering speed of the raw water does not need to be matched accurately, the softening efficiency is high for the industrial raw water, and the filtering speed is up to 120m / h.

Description

technical field [0001] The invention relates to a raw water softening device, in particular to a device for softening industrial raw water by using a circulating fluidized-suspension bed process. Background technique [0002] In the field of water treatment, the traditional industrial raw water softening device is a clarifier with sludge contact process. There are two main types: one is sludge return clarifier, which specifically includes hydraulic circulation clarifier, impeller circulation clarifier, and accelerated impeller circulation clarifier. Its structural feature is to set the hardness factor in the raw water and the CaCO content generated by the softening agent. 3 The crystal grain sediment circulation backflow structure, so that the hardness factor and softening agent in the new raw water can be reduced by the CaCO in the sediment 3 The crystal grains are crystal nuclei and crystallization, which accelerates the reaction process. The other type is sludge suspen...

AI Technical Summary

Problems solved by technology

The disadvantages are: 1. The efficiency of the device is low, and the filtration rate is 5-7 m / h. In order to meet the requirements of the process operation, the required structure is large in size and large in investment; 2. The particle size of the crystallization product is small, about 0.01-0.05mm, It is in the state of sludge, with high water content, and the subsequent drying treatment is difficult; 3. The device occupies a lot of land, and the cost of land use is high

Its disadvantages are: 1. It is necessary to prepare a large number of artificial crystal nuclei that meet the requirements of the equipment, and the artificial crystal nuclei need to be continuously consumed during the operation of the equipment, which increases the operating cost; Strict matching is required, for example, the filtration rate of 50-70 m / h corresponds to the particle size of 0.2-0.4 mm, otherwise the artificial crystal nucleus cannot be kept in a suspended state, and the process fails; 3. During the manufacturing process of the artificial crystal nucleus, the crystal surface is polluted, The crystal lattice is destroyed, and it takes a long time for the new crystal lattice to attach and cover at the initial stage of crystallization, so the softening efficiency of the cyclone clarifier for industrial raw water is low

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