Technology for drying sludge by multistage heat treatment
A two-stage drying and drying technology, which is applied in the fields of multi-stage heat treatment drying sludge, sludge pyrolysis, foam breaking, emulsification, drying process, and dehydration, can solve the problems of uneven moisture content and inability to handle sludge, and achieve Achieve resource utilization, save equipment investment, and improve processing efficiency
Inactive Publication Date: 2019-07-12
苏州禾甪环保科技有限公司
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Problems solved by technology
[0005] The current sources of sludge mainly include high-water sludge with a moisture content of about 80% and low-water sludge with a moisture content of about 60%. The inconsistency of the moisture content of the two types of sludge prevents them from being processed on the same production line.
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Embodiment 1
[0027] See figure 1 As shown, a multi-stage heat treatment process for drying sludge includes the following steps:
[0028] Step 1: Send at least one kind of high-water sludge into a first-stage dryer for stir-frying and pyrolysis to break bubbles into hot muddy water;
[0029] Step 2: Send the hot sludge obtained in Step 1 to an emulsification device and add cooling liquid to destroy its viscosity, and then send it to a dehydrator for dehydration to obtain water-containing sludge;
[0030] Step 3: Send the water-containing sludge and at least one kind of low-water sludge together into a secondary dryer for drying to obtain dried sludge.
[0031] In this embodiment, the steam temperature in the primary dryer and secondary dryer is about 187°C.
[0032] When the equipment is installed, steam is first introduced, and the steam is processed by the voltage stabilizing device and then enters the first-level dryer and the second-level dryer respectively. Among them, the first-level dryer and...
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The invention discloses a technology for drying sludge by multistage heat treatment. The technology comprises the following steps: 1, at least one high-water sludge is fed into a first-stage dryer, and is stirred, pyrolyzed and defoamed to form a hot muddy water; 2, the hot muddy water obtained in step 1 is fed into an emulsifying device, a cooling liquid is added to destroy the viscosity of the hot muddy water, and the obtained muddy water is fed into a dehydrator, and is dehydrated to obtain water-containing sludge; and 3, the water-containing sludge and at least one low-water sludge are fedinto a secondary dryer, and are dried to obtain dried sludge. The technology which treat the high-water sludge and the low-water sludge which have different water content values on the same production line has the advantages of optimization of the treatment process, improvement of the treatment efficiency, saving of the device investment, and reduction of the treatment cost.
Description
Technical field [0001] The invention relates to the technical field of sludge treatment, in particular to a process for drying sludge by multi-stage heat treatment, and in particular to processes for pyrolysis, defoaming, emulsification, dehydration and drying of sludge. Background technique [0002] Sludge is a pollutant in the water. If it cannot be treated thoroughly, the pollution will always exist. The sludge is gray-black in shape, blisters, which contain a lot of protein, organic matter, and various bacterial pathogens. Long-term shelving of sludge will cause rot and smell, produce methane, hydrogen sulfide and other poisonous gases, and breed bacteria, mosquitoes and flies, spread diseases, and endanger lives. Industrial sludge also contains heavy metals and chemicals, which pollute water and soil and harm the environment. [0003] Early sludge disposal at home and abroad was mainly based on stacking, dumping the sludge into rubber fields, vegetable fields, green fields, ...
Claims
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Login to View More IPC IPC(8): C02F11/10C02F11/14C02F11/13
CPCC02F11/10C02F11/12C02F11/14
Inventor 李兴
Owner 苏州禾甪环保科技有限公司