High-temperature plasma vitrification device for sludge and treatment method thereof

Abstract

The invention relates to a high-temperature plasma vitrification device for sludge and a treatment method thereof. The device comprises a sludge combustor, a first capturer, a vitrification furnace, a first high-temperature plasma torch, a second capturer, a collecting pipeline, a second high-temperature plasma torch, a pipeline, a tailing outlet and a PLC automatic control system which is used for achieving automated treatment operation and control of sludge. The treatment method is characterized in that the treatment method is divided into two stages: primary stage treatment mainly aims at relatively big sludge granules; secondary stage treatment mainly aims at sludge granules in smoke; the whole treatment process not only can be used for plasma vitrification on the relatively big sludge granules, but also can be used for vitrification treatment on smoke containing relatively small granules. The device provided by the invention is simple in structure and small in occupied area, and the treatment process is automatically controlled by the PLC without manual operation or intervention. During treatment, neither harmful gases nor toxic gases are discharged, and the device is thorough in sludge treatment, high in efficiency and wide in application range.

Description

technical field [0001] The invention relates to sludge treatment technology, in particular to a sludge high-temperature plasma vitrification device and a treatment method thereof. Background technique [0002] Conventional sludge is the product of sewage purification treatment in sewage treatment plants. The characteristics of sludge are: 1. The composition is very complex, colloidal, unstable, perishable and smelly; 2. Heavy metals, toxic and harmful pollutants High content; 3. High water content, poor dehydration, not easy to dehydrate; 4. Contains a large number of pathogenic bacteria and parasite eggs. Unreasonable treatment of such sludge will cause great harm to the environment and human and animal health. [0003] The current main disposal processes are: 1. Anaerobic fermentation; 2. Aerobic fermentation; 3. Co-incineration (including co-incineration in cement plants, co-incineration in power plants, co-incineration of waste, etc.); 4. Simple landfill; 5. Fertilizer ...

AI Technical Summary

Problems solved by technology

The existing above-mentioned sludge disposal technology has the following main technical shortcomings: 1. The process and effect of anaerobic fermentation treatment are greatly affected by the change of sludge composition, and the disposal efficiency is low; 2. The energy consumption of aerobic digestion sludge treatment method High, large basic investment, greatly affected by changes in sludge composition; 3. The process of co-incineration disposal can produce toxic gases such as dioxins, which cannot solve the pollution problem of toxic and harmful substances such as heavy metals in sludge; 4. Simple landfill Gradually banned, this method can cause serious environmental pollution problems; 5. The sludge production fertilizer contains heavy metals and other pollutants, which can only be used for landscaping, and there is a risk of causing environmental pollution

However, due to the large amount of sludge, drying requires energy consumption, high cost, and landfill wastes land resources. The sludge itself has a certain calorific value, so it can be vitrified to realize sludge disposal.

However, most of the current sludge vitrification treatment equipment is complex in structure, difficult to control, and low in treatment efficiency. The flue gas emitted during the treatment process can easily cause secondary pollution; for example, a glass disclosed in Chinese patent ZL 201420139125.8 The sludge treatment system cannot classify and capture the sludge. This undifferentiated vitrification process will cause a lot of energy consumption. The cleaning treatment of the flue gas is not only costly, but also cannot completely avoid the sludge treatment process. Possibility of secondary pollution in

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