Sludge feeding test device capable of conditioning ionic mobility and molecular weight

Abstract

The invention relates to the technical field of sludge processing treatment, in particular to a sludge feeding test device capable of conditioning ionic mobility and molecular weight. The device comprises a feeding device body, a containing cavity is formed in the feeding device body, a filtering mechanism is arranged in the middle of the containing cavity, the filtering mechanism divides the containing cavity into an upper part and a lower part, the upper part is a filter chamber, the lower part is a conditioning chamber, a feeding pipeline is arranged at the upper end of the feeding device body, a feeding port is formed in one end, positioned outside the feeding device body, of the feeding pipeline, the other end is communicated with the filter chamber, the bottom of the conditioning chamber is designed to be in a funnel shape, a discharging port is formed in the bottommost end of the conditioning chamber, an agent adding pipeline is further arranged on the side wall of the feeding device body, an agent adding port is formed in the end, located outside the feeding device body, of the agent adding pipeline, and the other end of the agent adding pipeline is communicated with the conditioning chamber. According to the invention, sludge feeding and conditioning can be automatically combined, the preparation procedure before a plate-and-frame filter pressing test is effectively simplified, and the test efficiency is improved.

Description

technical field [0001] The invention relates to the technical field of sludge processing, in particular to a sludge feeding test device capable of conditioning and tempering. Background technique [0002] The solid matter in sludge is mainly colloidal particles, which have a strong affinity with water, high volatile solid content, high specific resistance, and difficult dehydration. It is generally believed that when the specific resistance value of sludge is between (0.1-0.4)*10^9S2 / g, it is more economical and appropriate to carry out mechanical dehydration, but when the specific resistance value of sludge is greater than this value, before mechanical dehydration, It is necessary to pretreat the sludge to change the physical and chemical properties of the sludge particles, destroy the colloidal structure of the sludge, reduce its affinity with water, and reduce the specific resistance, thereby improving its dehydration performance. This process is called sludge conditionin...

AI Technical Summary

Problems solved by technology

The disadvantage of adding inorganic conditioning agent is that the dosage is relatively large, and the dosage should reach 5%-20% of the dry solid weight of sludge, which will lead to an increase in the volume of the filter cake; the second is that the inorganic conditioning agent itself is corrosive (especially Iron salt), the dosing system must have anti-corrosion properties

The second is the molecular weight. The molecular weight mainly determines the dosage. If the molecular weight is small, there will be no flocs or small flocs. If the molecular weight is too large, the conditioner will wrap the sludge particles, and the flocs will repel each other, resulting in poor flocculation effect. Pressure filtration or centrifugal effect is not ideal

[0003] Sludge processing includes plate and frame filter press test. Before the frame filter press test, the sludge needs to be conditioned and tempered. Most of the existing conditioning and tempering are carried out separately, and the process is cumbersome and cannot be fed with sludge. The device is organically combined with automation to simplify the test procedure and improve test efficiency

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