Patent RU-2706847-C1 (RU)
Title: Method for environmentally safe and wasteless recycling of reproduced and accumulated solid municipal wastes (smw) using magnesia-binding substances and industrial complex without wastes for its implementation
Inventor: Gershovich Aleksandr Abramovich
IPC: B03B9/06
Filed: 2019-03-20
Granted: 2019-11-21
Abstract: FIELD: waste processing and disposal. 
     SUBSTANCE: group of inventions relates to recycling solid municipal wastes (SMW) and production of construction/finishing articles and structures. Disclosed is a method for nonwaste recovery of SMW and production of construction/finishing articles and building structures from "tailings" of processed SMW using magnesia-binding substances. Method comprises the following steps: delivery to receiving department of SMW, where preliminary or subsequent sampling of large-sized wastes (LSW) is performed with their further disassembly and handling, with obtaining of market-demanded secondary resources; then, separation (1st level of separation) of secondary resources suitable for subsequent use from supplied SMW in deep separation department, preliminary part of carbon-containing fractions SMW is selected for "cold pyrolysis" in power module for subsequent production of fuel products, which are further used to produce heat and electric energy for auxiliary needs of industrial complex ZW; further, OF SMW, including fine fractions, is fed into drying section; drying OF SMW is performed in automatic mode in a drying compartment at temperature of 160…200 °C with mixing at rotation of drying drums to 12…14 % moisture content, with water vapor discharge into atmosphere through ventilation pipes, wherein supply of heat energy to drying compartment is performed from own power module; then, OF SMW is supplied into grinding compartment with subsequent crushing and grinding of dried OF SMW of different morphological composition to fractions 0.1…6.0 mm; further, fractions with size of 0.1…6.0 mm on conveyor-vibration table (2nd stage of separation), wherein crushed and dried fractions during movement along conveyor-vibration table are intensely mixed with each other and as if jumping, at that, light fractions with powerful hot air flows are blown off into special containers, and heavy fractions remaining on the conveyor-vibratory table are further directed to the warehouse as a ready market product. Then one performs pulp preparation in the pulp preparation compartment, in the mixer hopper, where the light fractions are thoroughly mixed with the preserving NaCl brine and water added through the batcher to produce a homogeneous pulp; then, pulp is transported via pipelines to the pulp temporary storage location (PTSL) made in the form of reservoirs of vertical type. Pulp with PTSL, through into pulp distribution and transportation center, is directed for further processing. Pulp before its use in technological processes for production of construction/finishing articles and building structures, per 0.5…1.0 hour before its use, is activated to obtain a homogeneous mass, the molding mass of the PM, where into the pulp there added in ratio 1:1 magnesia-binding substances MgO and MgCl 2 , after which said mixture is thoroughly mixed, after which the process of making construction/finishing articles and structural structures from PM is performed by pouring PM in appropriate molds with subsequent vibration compaction, and/or additional pressing, and/or heating, or by extrusion. 
     EFFECT: technical result is higher efficiency and environmental friendliness of SMW recycling, reduced power consumption for SMW processing. 
     2 cl, 1 dwg