Vacuum electroosmosis curing water supply plant sludge device and use method thereof

Abstract

The invention discloses a vacuum electroosmosis curing water supply plant sludge device and a use method thereof. The positive electrode and the negative electrode of a direct-current power supply of the device are respectively connected with negative electrode metal and positive electrode metal inside a sludge tank; the other ends of the negative electrode metal and the positive electrode metal are respectively connected with vacuum tanks through drain tubes; vacuum pumps and valve are arranged on the drain tubes; the vacuum pumps are both connected with a timing switch. According to the method, curing is performed firstly and electroosmosis is performed secondly, and the timing switch is adopted to control the vacuum pumps to be opened or closed. The vacuum electroosmosis curing water supply plant sludge device is good in water supply sludge curing effect, the sludge obtained after metal ions are removed meets the national soil reuse discharge standard, and the operation cost is low when being compared with that of a conventional vacuum combined electroosmosis device.

Description

technical field [0001] The invention relates to a water supply sludge solidification device, in particular to a vacuum electroosmosis solidification water supply plant sludge device and a use method thereof. Background technique [0002] Municipal sludge is divided into water supply plant sludge, sewage plant sludge and chemical sludge. However, in terms of output, water supply plant sludge and sewage plant sludge have a large output, which is convenient to collect and can be processed in a centralized manner. Both types of sludge have the following characteristics: [0003] (1) The moisture content is high, and the moisture content of the sludge is as high as 97%. The moisture in the sludge is divided into free water, interstitial water, surface bound water and molecular bound water. Generally, free water can evaporate through Fenghua, and interstitial water can be removed by coagulation and centrifugation, but bound water is difficult to remove. [0004] ...

AI Technical Summary

Problems solved by technology

The combination of vacuum and electroosmosis to treat water supply sludge also has difficulties. First, water electrolysis will occur at both ends of the electrode, which not only changes the local pH value, but also leads to the re-complexation and precipitation of metal ions in the sludge in a free state. , and the electrolyzed hydrogen ions and hydroxide ions cannot be annihilated into water molecules under the action of the electric field force, which reduces the dehydration rate and efficiency

The second is that the vacuum filtration in the electroosmotic process is generally achieved by turning on the vacuum pump, but the electroosmotic effect is relatively slow. Generally, an electroosmotic dehydration takes about 2 days. The migration of water by electroosmotic force is a gradual process. If Turning on the vacuum pump all the time or turning it on manually will lead to a waste of power resources and human resources

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