Sludge wet-processing technology and equipment

Abstract

A sludge wet-processing technology comprises the following steps: a, sending sludge into a sludge tank, and pumping the sludge into a mixing pool by the use of a slurry pump; b, adding water into the mixing pool and stirring, and making the sludge flow into a liquid storage pool from the mixing pool; c, using a plurality of sewage pumps in the liquid storage pool to pump the sludge into a mixer; d, using a sludge pump below the mixer to pump the sludge into a double-shaft stirring reamer to be mixed with cement raw meal; and e, pouring the mixed sludge and raw meal into a balling plate and then entering a JT kiln, and calcining according to calcining steps of a cement production technology so as to obtain a clinker. Sludge wet-processing equipment comprises the JT kiln in the cement production process unit, a raw meal measuring bin, a single-pipe reamer, a weigher, the double-shaft stirring reamer, the balling plate, the sludge tank, the mixing pool, the liquid storage pool and the mixer. The double-shaft stirring reamer is connected below the mixer. The invention has the following advantages: as sludge is processed by a wet process and is comprehensively utilized in the invention, pollution is reduced, and cost for handling the sludge is reduced.

Description

[0001] technical field [0002] The invention relates to the technical field of environmental protection-sludge treatment, and is an advanced sludge treatment technology, in particular to a sludge wet treatment process and equipment. Background technique [0003] Sludge is solid waste produced in the process of sedimentation and filtration in sewage treatment plants. Its composition is very complex and can be divided into two categories: organic matter and inorganic matter. agent. Inorganic substances are fine powder minerals, and salt crystals include SiO 2 、AL 2 o 3 , Fe 2 o 3 etc., which contain toxic substances such as heavy metal mercury, lead, pathogenic microorganisms, and difficult-to-decompose chemical detergents and insecticides. Sludge disposal is a bottleneck that plagues urban beautification, livability, and scientific and healthy development. Take Tengzhou City, Shandong Province as an example. There are 8 sewage treatment plants in Tengzhou City, with a ...

AI Technical Summary

Problems solved by technology

Sludge disposal is a bottleneck that plagues urban beautification, livability, and scientific and healthy development. Take Tengzhou City, Shandong Province as an example. There are 8 sewage treatment plants in Tengzhou City, with a daily sewage treatment capacity of 330,000 tons and an annual sludge generation of 1 million tons. Currently There is only one sludge drying and incineration project in operation, which can process 300 tons of sludge with a moisture content of 70% to 80% per day. At the same time, a large amount of boiling slag is produced. More than 800,000 tons of sludge cannot be processed, and the newly added area is 200 square meters. More than mu, the annual sludge landfill cost is 100 million yuan. Due to osmosis, the heavy metals in the sludge have long threatened the safety of groundwater

Most of the sludge disposal methods in the prior art are to landfill or incinerate the sludge after dehydration treatment. Because the stench cannot be effectively removed, it is difficult to control the moisture content of the sludge below 30%. Landfill or incineration disposal methods are harmful to the surface, groundwater, air pollution

There are also a few that use sludge dehydration, chemical flocculation, and composting to make soil improvement materials or bricks. The pollution caused by deodorization and heavy metals to the surface, groundwater, and atmosphere is also not solved in resource utilization.

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