阅读说明：本技术 一种不可溶性废盐处理方法 (Insoluble waste salt treatment method ) 是由 郑先强 于 2019-08-23 设计创作，主要内容包括：本发明公开了一种不可溶性废盐处理方法,涉及危废处理技术领域,该方法包括：挖出填埋坑,在填埋坑内打地基,在地基上铺设防渗层；在防渗层上采用混凝土浇筑铺设渗液隔离存积层,铺设时向一侧倾斜,且在较低一侧的下部设置积液槽；在渗液隔离存积层上采用混凝土等间距浇筑设置倒梯形隔柱,形成密封填埋区；将处理好的不可溶性废盐填入密封填埋区；待同一填埋层内的所有密封填埋区均填满后,在不可溶性废盐上铺设密封层；在密封层上设置倒梯形隔柱,形成密封填埋区；将处理好的不可溶性废盐填入密封填埋区；待同一填埋层内的所有密封填埋区均填满后,在不可溶性废盐上铺设密封层；重复填埋直至完成。本发明具有安全性高的优点。(The invention discloses a method for treating insoluble waste salt, which relates to the technical field of hazardous waste treatment and comprises the following steps: digging a landfill pit, digging a foundation in the landfill pit, and paving an anti-seepage layer on the foundation; laying a seepage isolation and storage layer on the impermeable layer by adopting concrete pouring, inclining to one side during laying, and arranging a liquid storage tank at the lower part of the lower side; pouring inverted trapezoidal partition columns at equal intervals on the seepage isolation and storage layer by adopting concrete to form a sealed landfill area; filling the treated insoluble waste salt into a sealed landfill area; after all the sealing landfill areas in the same landfill layer are filled, laying a sealing layer on the insoluble waste salt; arranging inverted trapezoidal partition columns on the sealing layer to form a sealing landfill region; filling the treated insoluble waste salt into a sealed landfill area; after all the sealing landfill areas in the same landfill layer are filled, laying a sealing layer on the insoluble waste salt; and repeating the landfill until the completion. The invention has the advantage of high safety.)

1. The insoluble waste salt treatment method is characterized by being applied to a landfill, wherein the landfill comprises more than three landfill pits, and the bottoms of the landfill pits are provided with impermeable layers 5; more than three layers of buried layers are arranged in each buried pit in the vertical direction; a seepage isolation and storage layer 4 formed by pouring concrete is arranged between the impermeable layer 5 and the landfill layer above the impermeable layer, the seepage isolation and storage layer 4 is integrally inclined towards one side, a liquid accumulation groove 6 is arranged at the lower part of the lower side of the seepage isolation and storage layer, and the liquid accumulation groove 6 is communicated with an external liquid drainage pipeline; a sealing layer 1 is arranged between two adjacent landfill layers; each layer of landfill layer comprises inverted trapezoid partition columns 2 arranged at equal intervals, and the inverted trapezoid partition columns 2 divide the landfill layer into more than three sealed landfill regions with large lower parts and small upper parts for sealing and landfill insoluble waste salt;

the method comprises the following steps:

s1, digging a landfill pit, digging a foundation in the landfill pit, and paving an anti-seepage layer on the foundation;

s2, paving a seepage isolation and storage layer on the impermeable layer by adopting concrete pouring, inclining to one side during paving, and arranging a liquid accumulation groove at the lower part of the lower side;

s3, pouring inverted trapezoidal partition columns on the seepage isolation and storage layer at equal intervals by adopting concrete to form a sealed landfill area;

s4, filling the treated insoluble waste salt into a sealed landfill area;

s5, paving a sealing layer on the insoluble waste salt after all sealing landfill areas in the same landfill layer are filled;

s6, pouring inverted trapezoidal partition columns on the sealing layer at equal intervals by adopting concrete to form a sealing landfill area;

s7, filling the treated insoluble waste salt into a sealed landfill area;

s8, paving a sealing layer on the insoluble waste salt after all sealing landfill areas in the same landfill layer are filled; returning to the step S6 until the landfill is completed.

2. The method for treating insoluble waste salt according to claim 1, wherein the inclination of the seepage-isolating and reserving layer is in the range of 5 ° to 10 °.

3. The method for treating insoluble waste salt according to claim 1 or 2, wherein the ratio of the upper bottom to the lower bottom of the inverted trapezoidal cross section of the inverted trapezoidal partition column is 1: 0.6-0.4.

4. The treatment method of insoluble waste salt according to any one of claims 1 to 3, wherein the impermeable layer is a foundation soil layer, a flexible impermeable film layer, a clay impermeable layer and a flexible impermeable film layer in sequence from bottom to top.

5. The method for treating insoluble waste salt according to any one of claims 1 to 4, wherein the sealing layer comprises a clay leveling layer, a flexible anti-seepage film layer and a concrete pouring layer in sequence from bottom to top.

6. The insoluble waste salt treatment method according to any one of claims 1 to 5, wherein the bottom of each sealed landfill area is provided with a wedge-shaped bottom 3 formed by pouring concrete, and the wedge-shaped bottoms 3 of all the landfill areas are inclined to the side of the liquid collecting tank 6.

7. The insoluble waste salt treatment method according to any one of claims 1 to 6, further comprising the following steps after all the sealed landfill areas in the same landfill are filled and before the sealing layer is laid on the insoluble waste salt:

and laying a layer of gravel to form a gravel layer, wherein the gravel layer is communicated with an external waste gas treatment device.

Technical Field

The invention relates to the technical field of hazardous waste treatment, in particular to a method for treating insoluble waste salt.

Background

Large and medium-sized chemical enterprises such as electroplating, medicines, pesticides, daily chemical industry, sewage treatment and the like can generate a large amount of semi-solid or solid hazardous wastes such as waste salt and the like in the chemical production process, and have great influence on the environment; the existing harmless treatment mode of waste salt is to adopt a landfill site for landfill.

The landfill site is a special dangerous waste disposal engineering facility which stores and isolates dangerous waste so as to minimize the influence on human health and ecological environment, but after the waste salt is stored for a long time, the possibility of leakage of the waste salt is very high for most of the flexible landfill sites at present, great risk exists, and great potential safety hazard exists for regional environment. If a safety accident happens, the consequences can not be imagined.

Disclosure of Invention

Therefore, in order to overcome the defects in the prior art, the embodiment of the invention provides an insoluble waste salt treatment method, which improves the safety.

Therefore, the insoluble waste salt treatment method provided by the embodiment of the invention is applied to a landfill, the landfill comprises more than three landfill pits, and the bottom of each landfill pit is provided with an impermeable layer 5; more than three layers of buried layers are arranged in each buried pit in the vertical direction; a seepage isolation and storage layer 4 formed by pouring concrete is arranged between the impermeable layer 5 and the landfill layer above the impermeable layer, the seepage isolation and storage layer 4 is integrally inclined towards one side, a liquid accumulation groove 6 is arranged at the lower part of the lower side of the seepage isolation and storage layer, and the liquid accumulation groove 6 is communicated with an external liquid drainage pipeline; a sealing layer 1 is arranged between two adjacent landfill layers; each layer of landfill layer comprises inverted trapezoid partition columns 2 arranged at equal intervals, and the inverted trapezoid partition columns 2 divide the landfill layer into more than three sealed landfill regions with large lower parts and small upper parts for sealing and landfill insoluble waste salt;

the method comprises the following steps:

s1, digging a landfill pit, digging a foundation in the landfill pit, and paving an anti-seepage layer on the foundation;

s2, paving a seepage isolation and storage layer on the impermeable layer by adopting concrete pouring, inclining to one side during paving, and arranging a liquid accumulation groove at the lower part of the lower side;

s3, pouring inverted trapezoidal partition columns on the seepage isolation and storage layer at equal intervals by adopting concrete to form a sealed landfill area;

s4, filling the treated insoluble waste salt into a sealed landfill area;

s5, paving a sealing layer on the insoluble waste salt after all sealing landfill areas in the same landfill layer are filled;

s6, pouring inverted trapezoidal partition columns on the sealing layer at equal intervals by adopting concrete to form a sealing landfill area;

s7, filling the treated insoluble waste salt into a sealed landfill area;

s8, paving a sealing layer on the insoluble waste salt after all sealing landfill areas in the same landfill layer are filled; returning to the step S6 until the landfill is completed.

Preferably, the inclination of the seepage isolation and storage layer ranges from 5 to 10 degrees.

Preferably, the ratio of the upper bottom to the lower bottom of the inverted trapezoidal cross section of the inverted trapezoidal partition column is 1: 0.6-0.4.

Preferably, the impermeable layer comprises a foundation soil layer, a flexible impermeable film layer, a clay impermeable layer and a flexible impermeable film layer from bottom to top in sequence.

Preferably, the sealing layer sequentially comprises a clay leveling layer, a flexible anti-seepage film layer and a concrete pouring layer from bottom to top.

Preferably, the bottom of each sealing landfill area is provided with a wedge-shaped bottom 3 formed by pouring concrete, and the wedge-shaped bottoms 3 of all the landfill areas are inclined towards the liquid collecting tank 6.

Preferably, after all the sealed landfill areas in the same landfill layer are filled and before the sealing layer is laid on the insoluble waste salt, the method further comprises the following steps:

and laying a layer of gravel to form a gravel layer, wherein the gravel layer is communicated with an external waste gas treatment device.

The technical scheme of the embodiment of the invention has the following advantages:

according to the insoluble waste salt treatment method provided by the embodiment of the invention, the inverted trapezoidal partition columns are arranged in each layer of the landfill layer in a pouring mode, the sealing performance of each separated landfill region is good, the pollution cannot be expanded even if local waste salt leaks in the landfill site, the safety is high, the separated sealed landfill regions with large lower parts and small upper parts can effectively prevent liquid from permeating into the landfill regions, and the safety of the landfill site is further improved.

Drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings used in the description of the embodiments will be briefly introduced below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and it is obvious for those skilled in the art that other drawings can be obtained according to the drawings without creative efforts.

FIG. 1 is a schematic structural view of a concrete example of a landfill site in an embodiment of the present invention;

fig. 2 is a flowchart showing a specific example of the method for treating insoluble waste salt in the embodiment of the present invention.

Reference numerals: 1-sealing layer, 2-inverted trapezoidal partition column, 3-wedge bottom, 4-seepage isolation deposit layer, 5-impermeable layer and 6-liquid accumulation tank.

Detailed Description

The technical solutions of the present invention will be described clearly and completely with reference to the accompanying drawings, and it should be understood that the described embodiments are some, but not all embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

In describing the present invention, it is to be understood that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. As used herein, the singular forms "a", "an" and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise. The terms "comprises" and/or "comprising," when used in this specification, are intended to specify the presence of stated features, integers, steps, operations, elements, and/or components, but do not preclude the presence or addition of one or more other features, integers, steps, operations, elements, components, and/or groups thereof. The term "and/or" includes any and all combinations of one or more of the associated listed items. The terms "upper", "lower", "left", "right", etc. indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience in describing and simplifying the description, but do not indicate or imply that the referred devices or elements must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.

In addition, the technical features involved in the different embodiments of the present invention described below may be combined with each other as long as they do not conflict with each other.