New method for storing and disposing general industrial solid waste
Technical Field
The invention belongs to the field of treatment and disposal of general industrial solid wastes, and particularly relates to a method for storing and disposing general industrial solid wastes, which is particularly suitable for storing and disposing class II general industrial solid wastes and general industrial solid wastes containing organic matters, can also be used for storing and disposing urban construction wastes, domestic wastes and river sludge, realizes low-cost, convenient, partition and ordered storage and disposal while ensuring that the storage and disposal processes and the final sealing meet the requirements of safety and environmental protection, and simultaneously makes necessary preparation for recycling later-period resources.
Background
The general industrial solid waste storage and disposal site is an important facility of enterprises and is mainly used for non-permanent and permanent centralized storage sites of the general industrial solid waste. The industrial solid waste storage and disposal site is an important safe and environment-friendly facility for enterprises, and the safe, efficient, low-cost and environment-friendly storage and disposal of general industrial solid waste has important practical significance for normal operation and good benefit of the enterprises.
At present, in the common industrial solid waste storage and disposal process of China, loose side slopes are easy to form, the solid waste is dumped randomly, seepage-proofing and dust-proofing problems are avoided, secondary pollution and the like, a safety hazard source and an environmental pollution source are formed in the disposal process, and the solid waste is not beneficial to later-stage resource development and utilization after disposal.
At present, due to the fact that the total amount of general industrial solid wastes is large, the types of the general industrial solid wastes are mixed, and the dryness and the wetness are not uniform, various safety and environmental protection problems are easy to occur after the general industrial solid wastes are stored, meanwhile, the difficulty in later-stage solid waste recycling is brought, and the method for storing and disposing the general industrial solid wastes is low in cost, convenient, fast, zoned and ordered, and has important practical significance for ensuring normal production of enterprises, protecting the environment, reducing cost and improving efficiency and developing and utilizing later-stage resources.
In practical application, the existing general industrial solid waste storage and disposal method has the following problems:
(1) the disposal facilities fall behind: the diversity, the difference of water content and the discrete type of physical and chemical properties of common industrial solid waste materials are not considered systematically, and the disposal and filling method and facilities fall behind, thereby increasing the storage difficulty and the disposal cost.
(2) The safety of the disposal method is poor: the existing disposal method is easy to form dangerous sources and potential safety hazards, and the problems of vehicle damage, equipment overturn, slope small-range collapse and the like are easy to occur in the disposal process.
(3) Later-period resource recycling is inconvenient: the existing disposal method does not systematically consider the diversity of general industrial solid waste materials and the development and utilization requirements of later-stage resources, and various solid wastes are mixed and disorderly piled, so that the inconvenience and the cost are brought to the later-stage resource recycling.
(4) Secondary pollution may be present: the storage sites of general industrial solid wastes do not have efficient and systematic collection of percolate, such as the damage of an impermeable layer can pollute the surrounding soil and water.
Disclosure of Invention
The invention aims to provide a novel method for storing and disposing general industrial solid wastes, which is applied to the storage and disposal of the general industrial solid wastes, and realizes low-cost, convenient, fast, zoned and ordered storage and disposal and facilitates subsequent development and utilization while ensuring that the storage and disposal processes and the final sealing meet the requirements of safety and environmental protection.
In order to achieve the above purpose of the present invention, the new method for storing and disposing the general industrial solid waste adopts the following technical scheme:
the invention relates to a novel method for storing and disposing general industrial solid wastes, which selects a proper storing and disposing place nearby according to the characteristics, the generation amount and the stacking and discharging plan of the general industrial solid wastes to be stored and disposed, cleans the original ground surface of the selected storing and disposing place, lays a base impermeable layer on the original ground surface, and is implemented by adopting the following steps:
1) after the foundation impervious barrier is laid, constructing a first layer of a grid-shaped rectangular frame formed by criss-cross trapezoidal permeable barrage, wherein the trapezoidal permeable barrage is formed by piling waste rocks or hardened construction waste materials (waste rocks, waste bricks, waste concrete, waste building blocks and the like), the width of the top of the trapezoidal permeable barrage is the width required by the walking of a mechanical vehicle, and the gradient of the trapezoidal permeable barrage is the natural repose angle of the waste rocks or the hardened construction waste materials; a water filter pipe for collecting general industrial solid waste percolate is embedded in the bottom of the first layer of trapezoidal permeable blocking dam in the longitudinal horizontal direction, the water filter pipe is communicated with a percolate collecting and treating pool through a water guide pipe, and percolate collected by the water filter pipe is discharged into the percolate collecting and treating pool outside a field through the water guide pipe; partitioning according to the category, the water content and the physical property difference, and filling general industrial solid wastes in a frame-shaped rectangular frame formed by the trapezoidal permeable dam;
2) after the first layer of grid-shaped rectangular frames are filled with general industrial solid wastes, a second layer of grid-shaped rectangular frames, a third layer of grid-shaped rectangular frames, … … and an nth layer of grid-shaped rectangular frames are sequentially constructed on the basis of the trapezoidal water-permeable retaining dam of the first layer of grid-shaped rectangular frames from bottom to top, and the general industrial solid wastes are sequentially filled in each layer of grid-shaped rectangular frames according to the classification, the water content and the physical property difference in a partitioning manner and are circularly carried out; the number n of layers of the lattice rectangular frames, the thickness of each layer, the size and the number of the lattices are determined according to the arrangement of the filling schedule of the general industrial solid wastes to be stacked;
3) and after the rectangular frame on the uppermost layer is fully piled with general industrial solid wastes, the surface is leveled, and a ground surface barrier layer is constructed on the leveled surface.
When the general industrial solid waste contains organic components, air guide floral tubes for discharging organic waste gas are required to be arranged in the vertical direction in the trapezoidal water-permeable barrage.
Furthermore, the base impermeable layer is formed by combining a clay protective layer, a composite geomembrane and a clay protective layer from bottom to top in sequence.
Furthermore, the composite geomembrane is preferably an HDPE composite geomembrane, the model of the HDPE composite geomembrane is 200g/1.5mm/200g, and the thickness of the geotechnical material can be increased or the model of the geotechnical material can be adjusted under special conditions.
Furthermore, the ground surface barrier layer is a clay barrier layer and an loam covering layer from bottom to top, and grass seeds are sowed on the surface layer of the ground surface barrier layer for greening or plants are planted on the loam covering layer.
Furthermore, the thickness of the clay protective layer is 25-40 cm, the thickness of the clay barrier layer is 28-40 cm, and the thickness of the loam covering layer is 18-25 cm; the thickness can be increased accordingly when special conditions are encountered.
The further optimized condition is that the air guide flower pipe is a UPVC air guide flower pipe; the aqueduct adopts a UPVC aqueduct.
The further optimized technical parameters are that the vertical height of the single-layer trapezoidal water-permeable dam is 1.5-3.0 m, the maximum number of layers of the grid-shaped rectangular square frames is not more than ten, the plane size of the rectangular square frames is 50m × 50 m-150 m × 150m, and the size can be further enlarged when meeting general industrial solid waste materials with good physical and mechanical properties.
The pipe diameter of the water filter pipe is determined according to the water content of the material entering the site, the aperture ratio is larger than 15%, and the compressive strength is larger than 1.0MPa (the requirement for improving the compressive strength of the pipe when the thickness of the covering layer is larger).
The compressive strength of the UPVC gas guide floral tube and the UPVC water guide tube is more than 5.0MPa, and the tube diameter is determined according to the characteristics of materials entering a site.
The novel method for storing and disposing the general industrial solid waste has the following positive effects after adopting the technical scheme:
(1) the method considers the discrete type of the physical properties of common industrial solid waste materials, can store and dispose the solid waste in a partitioned mode, and arranges exhaust and seepage discharge facilities in a targeted mode, thereby reducing the storage difficulty and the disposal cost and enhancing the disposal safety.
(2) The method adopts the trapezoidal permeable barricade which can be used as a mechanical vehicle walking road and a permeable infiltration structure, improves the safety of solid waste stacking operation, enhances the strength of stacked materials, and effectively avoids accidents such as vehicle injury, equipment overturn and the like.
(3) The method considers the diversity of general industrial solid waste materials, can realize the storage and disposal of the solid waste in a partition mode, can flexibly adjust the size of a plane partition according to the physical and mechanical properties and the number of the materials entering the field, and is favorable for later resource development and reutilization.
(4) According to the method, a reliable anti-seepage structure is arranged on the original ground surface according to the principle of 'front baffle and rear baffle', a permeable structure with a large specific surface area, a drainage structure and a percolate collecting and treating facility are arranged in a storage yard, so that drainage consolidation of general industrial solid waste materials can be realized in a short time, the water content of the packed materials is reduced, the stability of the packed materials is improved, and the materials are effectively prevented from polluting surrounding soil and water.
(5) The method can conveniently and uniformly arrange the air guide structures in the field, can better store and dispose common industrial solid wastes containing organic matters, can timely remove generated gas, reduce the temperature of stockpiled materials, and prevent the phenomena of bubbling, bulging and explosion of the field.
(6) After the solid waste in the last stage is stored and disposed, a reliable barrier layer is arranged on the ground surface, and the method is used for reclamation and green covering, so that later rainwater is prevented from infiltrating and the ecological environment of the site is restored.
Drawings
FIG. 1 is a schematic plan view of a novel method for storing and disposing of industrial solid waste according to the present invention;
FIG. 2 is a sectional view taken along line A-A of FIG. 1;
FIG. 3 is a cross-sectional view taken along line B-B of FIG. 1;
FIG. 4 is a schematic view of a base barrier construction useful in the present invention;
fig. 5 is a schematic view of the structure of a surface barrier layer used in the present invention.
Labeled as: 1-trapezoidal permeable barrage; 2-a water filter pipe; 3-a base barrier layer; 4-gas guide floral tubes; 5-a surface barrier layer; 6-a clay protective layer; 7-a composite geomembrane; 8-a clay barrier layer; 9-loam overburden.
Detailed Description
To better describe the present invention, a new method for storing and disposing of industrial solid waste according to the present invention will be described in detail with reference to the accompanying drawings.
As shown in fig. 1, a plan view of the novel method for storing and disposing general industrial solid waste of the present invention is combined with fig. 2, 3, 4 and 5, and the following steps are adopted in the novel method for storing and disposing general industrial solid waste of the present invention:
1) selecting storage and disposal sites according to the characteristics, the production amount and the stacking plan of general industrial solid wastes to be stored and disposed, cleaning the original ground surface of the selected storage and disposal sites, cleaning sharp and hard materials and the like (such as raised stone blocks) on the ground surface, and flatly paving a base impermeable layer 3 on the original ground surface.
2) After the foundation impermeable layer 3 is laid, constructing a first layer of a grid-shaped rectangular frame formed by criss-cross trapezoidal permeable barrage 1, wherein the trapezoidal permeable barrage 1 is formed by piling waste rocks or hardened construction waste materials, the width of the top of the trapezoidal permeable barrage 1 is the width required by the walking of a mechanical vehicle, and the gradient of the trapezoidal permeable barrage 1 is the natural repose angle of the waste rocks or the hardened construction waste materials; a strainer 2 for collecting general industrial solid waste percolate is embedded at the bottom of the first layer of trapezoidal permeable blocking dam 1 in the longitudinal horizontal direction, the strainer 2 is communicated with a percolate collecting and treating tank through a water guide pipe 10, and the percolate is guided and discharged to the percolate collecting and treating tank outside the field; the water guide pipe 10 adopts a UPVC water guide pipe; carrying out common industrial solid waste filling in a frame-like rectangular frame formed by the trapezoid permeable barrage 1 according to the classification, the water content and the physical property difference; air guide floral tubes 4 for discharging organic waste gas are arranged in the vertical direction in the trapezoidal permeable barrage 1, and the air guide floral tubes 4 adopt UPVC air guide floral tubes.
3) After the first layer of grid-shaped rectangular frames are filled with general industrial solid wastes, the second layer of grid-shaped rectangular frames, the third layer of grid-shaped rectangular frames … … and the nth layer of grid-shaped rectangular frames are sequentially constructed on the basis of the trapezoidal water-permeable retaining dam 1 of the first layer of grid-shaped rectangular frames from bottom to top, air guide flower pipes 4 for discharging organic waste gas are sequentially arranged in the vertical direction in the trapezoidal water-permeable retaining dam 1, the air guide flower pipes 4 of the upper layer and the lower layer are communicated, the air outlets of the air guide flower pipes 4 arranged on the trapezoidal water-permeable retaining dam 1 in the last period (the uppermost layer) are provided with bent shapes (shown in figure 3), the general industrial solid wastes are sequentially filled in each layer of grid-shaped rectangular frames according to the difference of type, water content and physical property and are circularly filled, the number n, the thickness of each layer of grid-shaped rectangular frames and the size of the grid, the number of stacked general industrial solid wastes are arranged according to the requirement, and under the general situation, the vertical height of the single layer of the grid-shaped rectangular frames is 1.5 m-3.0 m, the maximum number of the grid-shaped rectangular frames is equal to the stacking mechanical property of the stacked general industrial solid wastes, the physical layer, the maximum number of the physical layer of the rectangular frames is equal to 63150.
4) After the rectangular frame at the uppermost layer is fully piled with general industrial solid wastes, the surface is flattened, a ground surface barrier layer 5 is constructed on the flattened surface, and the bent outlet of the air guide floral tube 4 is positioned on the ground surface barrier layer 5 to ensure that the landfill solid waste is normally exhausted.
As shown in fig. 4, the schematic view of the base impermeable layer structure adopted by the present invention shows that the base impermeable layer 3 is composed of a clay protective layer 6, a composite geomembrane 7 and the clay protective layer 6 which are combined in sequence from bottom to top, the composite geomembrane 7 is made of an HDPE composite geomembrane, and the thickness of the clay protective layer 6 is 30 cm; the HDPE composite geomembrane has the model of 200g/1.5mm/200g, and the thickness of the geotechnical material can be increased or the model of the geotechnical material can be adjusted when special conditions are met.
As shown in the schematic structural diagram of the ground surface barrier layer adopted by the invention shown in figure 5, the ground surface barrier layer 5 is a clay barrier layer 8 and a loam covering layer 9 from bottom to top, grass seeds are sown on the surface layer of the ground surface barrier layer 5 for greening or plants are planted on the loam covering layer 9, the thickness of the clay barrier layer 8 is 30cm, and the thickness of the loam covering layer 9 is 20 cm.
The novel method for storing and disposing the general industrial solid waste is used for storing and disposing the general industrial solid waste and sludge (containing organic components) which are stored for a long time in the environment treatment along the Yangtze river of Anhui, enterprises apply the method for storing and disposing the general industrial solid waste and sludge, the storage and disposal efficiency and the material management level are obviously enhanced, the operation safety is guaranteed, and accidents such as vehicle damage, equipment overturn and the like are not caused. The high moisture content of yard pile, contain organic matter solid waste, can realize the drainage consolidation in short time, promoted the safety and stability of storing, handling yard self, solid waste leachate has carried out the centralized collection and has handled, has effectively prevented the environmental safety risk. The method has the advantages that the solid waste at the entrance is stockpiled in a partitioned mode according to the material property, convenience is brought to later-stage management and resource development and utilization, enterprises are helped to realize safe, efficient, low-cost and environment-friendly storage and disposal of the generated industrial solid waste, and a good technical effect is achieved.