Method of stockpiling wastes into accumulator

FIELD: process engineering.

SUBSTANCE: invention relates to power engineering and utility plants and may be used for non-polluting stockpiling of various wastes. Horizontal piezometer is arranged at accumulator foundation. Then, dam is dumped. Cell-like forms are arranged on foundation surface to be filled with ash concrete. Thus, anti-filtration ash concrete shield of foundation is produced. Ash concrete shields are made on inner slopes of said dam by laying ash concrete bulk in layers. Then, gas-escape drainage is installed on anti-filtration shield to be built up as accumulator comes filled layer by layer. After dumping next layer of wastes, intermediate ash concrete layer is dumped thereon. Waterproof shield made from ash concrete is created on the surface of filled accumulator to be covered by soil reclamation layer.

EFFECT: improved environmental conditions.

2 dwg

 

The invention relates to energy & utilities and can be used for environmentally safe storage of different types of waste - solid waste, ash, sludge, etc.

There is a method of joint disposal of sewage sludge and solid waste, including the formation of the pit, the side walls and the base of which is covered with a waterproof screen and drainage, and construction of pressed pellets of solid waste wire frame filled with sediments of wastewater [RF patent №2115492, IPC6WV 1/00, published 20.07.1998].

The disadvantage of this method is the necessity of building a plant for briquetting of solid waste, the absence of exhaust gases from the store and the high cost of the screen from the plastic film.

The closest in technical essence to the proposed method is a process involving the formation of coatings on the drives, mainly household waste by dumping, layer-by-layer levelling, compacting and grading layers of coal ash, before sealing and layout top layer of coal ash on it stack equal to the mass of the compacted layer of activated sludge and mixed with ash, for example, by milling [RF patent №2151235, IPC7EV 7/06, 3/16, W 1/00, published 20.06.2000].

The disadvantage of this method is the low resistance to wind and water erosion, which leads to environmental pollution.

The technical result of the invention is the reduction of environmental pollution in the storage of household and ash wastes, in particular, eliminates the dusting otsypannoy ash and pollution of groundwater.

The technical result is achieved in that in the method of waste disposal in the drive, mainly household, including filling, layer-by-layer levelling, compaction and layout of the filled layers according to the invention at the base of the drive set horizontal piezometer, then occiput tailings dam, on the surface of the base of the scaffolding in the form of cells that fill Solomona, so get cutoff Solovetsky screen base, on the inner slopes of the tailings dam perform Solomonia screens, putting ash mass in layers, then on membrane screen of the base install suction drains and then increase them as a layer filling the drive, after dumping another layer of household waste on its surface occiput intermediate layer of ash, and on the surface of the filled drive create hydroisolation the initial screen, made of Solomona, over which is applied a soil recultivation layer.

Figure 1 shows a cross section of the drive; figure 2 - is a plan of the drive.

The method is as follows.

At the base of the drive to establish horizontal piezometer 1 to control the shielding effect of the screen, followed occiput from local soil tailings dam 2, then on the basis of 3 set of wooden formwork in the form of cells of 5×5 m, which is not extracted and further performs the functions of sedimentary seams (see figure 2). The cells are then pour Solomona prepared on the storage area in avtobetonomikser using the ash, which is characterized by a high content of free calcium oxide and the presence of clay minerals, in consequence of which has such an important feature as the ability to cementation when wet. The possibility of acquiring hardening ashes in the ratio of water in the range from 1:0.4 to 1:1.5 to low values of permeability (A·10-5÷A·10-7and high mechanical strength (2,7 MPa). So get cutoff Solovetsky screen 4, which consists of two layers of thickness 0.15 m; approximate ratio (by weight) of dry ash and water loaded in automatonlike, can be assigned to 1:1. Technology in the execution Solomonovo screen on the inner slopes of the dam 5 accept under the scheme, providing layer-by-layer stacking hardening vodonaevoi mixture along the slope in a wooden or metal climbing formwork. After creating impervious Solomonic screens of the base and the inner slopes of the tailings dam on the screen of the base install suction drains 6, which provide access to the atmosphere and control the composition of the gases formed by the decomposition of organic material in the layers of waste, and then increase them as a layer filling the drive. For the better preservation of the layers of waste occiput intermediate layers 7 of ash thickness 0.25 m; approximately the thickness of a layer of waste 8 is equal to 1 M. After filling the drive up to the design elevation create surface waterproofing Solovetsky screen 9 of a thickness of 0.3 m, over which is applied a soil recultivation layer 10 with a thickness of 0.2 m

Precipitation received at the surface of the embankment during construction, accumulate in the voids of the mound and are preserved in it. After the erection of the mound of waste at full height entrance of precipitation prevents surface waterproofing solomyanny the screen.

The advantage of the proposed method in comparison with the known is the fact that the use of Solomona as impervious screen on the establishment and sides of the drive, as well as the surface of the waterproofing of the screen provides a more secure warehousing and storage waste, excluding dusting otsypannoy ash. The proposed method allows you to virtually eliminate the pollution of the environment, particularly groundwater. This is achieved by reducing the cost of constructed memory.

The storage of waste in storage, mainly household, including filling, layer-by-layer levelling, compaction and layout of the filled layers, characterized in that the base drive install horizontal piezometer, then occiput tailings dam, on the surface of the base of the scaffolding in the form of cells that fill Solomona, so get cutoff Solovetsky screen base, on the inner slopes of the tailings dam perform Solomonia screens, putting ash mass in layers, then on membrane screen of the base install suction drains and then increase them as a layer filling the drive, after pouring the next layer of waste on its surface occiput the intermediate layer of ash, and on the surface of the filled drive waterproofing create a screen made of Solomona, over which is applied the ground recultivation the hydrated layer.



 

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