CN109644781A - A kind of ecological recovery method and its ecological flyash stack yard of flyash stack yard - Google Patents

A kind of ecological recovery method and its ecological flyash stack yard of flyash stack yard Download PDF

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Publication number
CN109644781A
CN109644781A CN201910028311.1A CN201910028311A CN109644781A CN 109644781 A CN109644781 A CN 109644781A CN 201910028311 A CN201910028311 A CN 201910028311A CN 109644781 A CN109644781 A CN 109644781A
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China
Prior art keywords
coal dust
fine coal
layer
flyash
dust heap
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CN201910028311.1A
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Chinese (zh)
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谢天宇
谢宁汉
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Individual
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    • AHUMAN NECESSITIES
    • A01AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
    • A01GHORTICULTURE; CULTIVATION OF VEGETABLES, FLOWERS, RICE, FRUIT, VINES, HOPS OR SEAWEED; FORESTRY; WATERING
    • A01G20/00Cultivation of turf, lawn or the like; Apparatus or methods therefor
    • AHUMAN NECESSITIES
    • A01AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
    • A01BSOIL WORKING IN AGRICULTURE OR FORESTRY; PARTS, DETAILS, OR ACCESSORIES OF AGRICULTURAL MACHINES OR IMPLEMENTS, IN GENERAL
    • A01B79/00Methods for working soil
    • A01B79/02Methods for working soil combined with other agricultural processing, e.g. fertilising, planting
    • EFIXED CONSTRUCTIONS
    • E02HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02DFOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
    • E02D17/00Excavations; Bordering of excavations; Making embankments
    • E02D17/20Securing of slopes or inclines
    • E02D17/202Securing of slopes or inclines with flexible securing means

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  • Life Sciences & Earth Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Environmental Sciences (AREA)
  • Mining & Mineral Resources (AREA)
  • Mechanical Engineering (AREA)
  • Soil Sciences (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • Paleontology (AREA)
  • Civil Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Structural Engineering (AREA)
  • Pit Excavations, Shoring, Fill Or Stabilisation Of Slopes (AREA)

Abstract

The ecological recovery method of flyash stack yard proposed by the present invention, comprising steps of (1) reinforces the side slope of fine coal dust heap, the mode of reinforcing is that structural strengthening or nonmetallic materials braiding circle are reinforced;(2) the covering improvement organoclay in the fine coal dust heap side slope reinforced, forms improvement organic soil layer;(3) plantation forms the surrounding vegetable layer for surrounding fine coal dust heap with fixing of soil and conservation of water in improvement organic soil layer;(4) the former earthing of fine coal dust heap top surface is improved, the planting plants on improvement earthing form top surface vegetable layer, this method efficiently solves the problems, such as the fugitive dust of flyash stack yard, and realizes the ecological recovery of flyash stack yard.

Description

A kind of ecological recovery method and its ecological flyash stack yard of flyash stack yard
Technical field
The present invention relates to the ecological restoration technical field of flyash stack yard more particularly to the ecological recovery sides of flyash stack yard Method and its ecological flyash stack yard.
Background technique
Electric power is the guarantee of China's rapid economic development, and China's electric power is still based on thermoelectricity, account for the 75% of total electricity with On, thermal power generation is still the mainstream of China's power industry within quite long period from now on.The fire coal of thermal power generation accounts for China The discharge amount of the 50% of output of coal, the annual flyash in the whole nation is more than 100,000,000 tons, these flyash are mostly deposited in various grey stockyards.
By the investigation to domestic Shuo Jia power plant, currently, power plant is substantially in such a way that level land heap is high to flyash It is stacked, then is covered using earthing.It is stacked in flyash and has mixed partial desulfurization gypsum and a small amount of furnace in transportational process The impurity such as slag, mainly there are two sources for the overburden soil of flyash: first is that coal mining spoir, second is that the cleaning soil on stockyard surface, These overburden soils are used for flyash heap Landfill covering after molding.
It is reported that fugitive dust of the flyash in toppling process in order to prevent, currently used is layered coverage desulfurized gypsum Mode;The fugitive dust of flyash during transportation in order to prevent, at present mostly using close or cover formula transport vehicle into Row transport, and watering dust prevention is carried out to flyash stack yard peripheral portion transport routes.
There are the following problems for above-mentioned existing flyash stack yard:
Firstly, be layered using desulfurized gypsum, dust-proof there are drawbacks, on the one hand, there are fugitive dust to show for desulfurized gypsum itself As, the problem of not can solve flyash fugitive dust, hinder the comprehensive utilization of flyash from now on instead because desulfurized gypsum with Flyash mixes heap can change the character of flyash significantly, be unfavorable for the comprehensive utilization of resources of flyash;On the other hand, desulfurization stone Cream easily causes the harmful metal pollution in flyash to spread, and in turn results in serious environmental pollution, and to the ground on stockyard periphery It is lauched and constitutes potential pollution risk with soil.
Second, current flyash, which stacks mode, be easy to cause internal flyash due to the too simple weakness of Slope Treatment Pollution leaks and risk of landslip.
Third, the organic principle of Landfill covering soil is less, raw-soil scope is substantially belonged to, so after fine coal dust heap is formed, very Difficulty is formed on its surface vegetation protection, is unfavorable for the firm and lasting of fine coal dust heap, and the overburden soil without vegetation protection is in wind New dust pollution source can be become under the external environment of solarization;
Fourth, watering dust suppression is makeshift, not only wasting manpower and material resources, but also cannot thoroughly solve the problems, such as fugitive dust.
Summary of the invention
In order to solve the problems existing in the prior art, the present invention is directed to propose a kind of ecological recovery method of flyash stack yard and Its ecological flyash stack yard can efficiently solve fugitive dust problem and control the pollution of flyash stack yard, realize that ecology is restored.
To achieve the above object, the ecological recovery method of flyash stack yard proposed by the present invention, includes the following steps:
(1) side slope of fine coal dust heap is reinforced, the mode of reinforcing is that structural strengthening or nonmetallic materials braiding circle add Gu;
(2) the covering improvement organoclay in the fine coal dust heap side slope reinforced, forms improvement organic soil layer;
(3) plantation forms the surrounding vegetable layer for surrounding fine coal dust heap with fixing of soil and conservation of water in improvement organic soil layer;
(4) the former earthing of fine coal dust heap top surface is improved, the planting plants on improvement earthing form top surface vegetation Layer.
Further, to the flyash stack yard of stable many years, first implement above-mentioned steps (4), then implementation steps (1) are extremely (3)。
Further, structural strengthening includes several strenthening members, and strenthening member is muscle prefabricated component in high-strength light band, prefabricated Part is by forming after calcium lime powder and fiber and/or the mixing of waste plastic silk ribbon are added in innoxious flyash.
Further, it in the case where the side slope step height of fine coal dust heap is less than 3m and grade of side slope angle less than 60 °, adopts The side slope of fine coal dust heap is reinforced with nonmetallic materials braiding circle.
Further, nonmetallic materials braiding circle is woven using organic/inorganic fiber, plastics or plant stem, is compiled Loop diameter≤1m is knitted, is highly 100mm~150mm.
Further, the Plant choosing transverse direction well developed root system of surrounding vegetable layer and top surface vegetable layer, drought-enduring, salt resistance alkali, life Long quickly careless class.
The present invention also proposes the ecological fine coal dust heap that a kind of ecological recovery method according to above-mentioned flyash stack yard obtains , including capped fine coal dust heap, it is successively reinforced layer, improvement organic soil layer and surrounding vegetable layer around fine coal dust heap and covers Lid, wherein reinforcing layer improves organic soil layer and be located at reinforcing layer near fine coal dust heap, surrounding vegetable layer farthest away from fine coal dust heap Between surrounding vegetable layer, reinforcing layer is fabric reinforcing layer or nonmetallic materials braiding circle reinforcing layer, the top surface of fine coal dust heap Successively it is modified soil layer and the covering of top surface vegetable layer, wherein improvement soil layer directly overlays on the top surface of fine coal dust heap.
Further, in the side slope step height of fine coal dust heap less than 3 meters and in the case that grade of side slope angle is less than 60 °, Reinforcing layer is using nonmetallic materials braiding circle reinforcing layer.
Further, it is that organic/inorganic fiber, plastics or plant stem braiding circle add that nonmetallic materials, which weave circle reinforcing layer, Gu layer.
Further, fabric reinforcing layer includes several strenthening members, and strenthening member is by flyash and calcium lime powder Mixture package fiber and/or waste plastic silk ribbon and in the high-strength light band that is formed muscle prefabricated component, strenthening member pass through anchor pole And/or anchor build-in is due in fine coal dust heap.
The beneficial effects of the present invention are:
(1) by fine coal dust heap is reinforced, is covered organoclay, plantation, solve the problems, such as the fugitive dust of flyash stack yard, Realize the ecology of flyash stack yard;
(2) desulfurized gypsum demixing technology in the prior art has been abandoned, the character of flyash is maintained, so that flyash exists It is subsequent to be still integrated into utilization;
(3) fabric reinforcing layer not only increases the performance of strenthening member using innoxious flyash as primary raw material, and makes Obtaining flyash turns waste into wealth;
(4) it is improved, and is planted by the former earthing to flyash stack yard top surface, so that the surrounding of fine coal dust heap With top by vegetative coverage, not only solves the problems, such as fugitive dust, but also improve ecological environment.
Detailed description of the invention
With reference to the accompanying drawing the present invention is made further to describe and illustrate.
Fig. 1 is the cross-sectional view of the ecological fine coal dust heap of preferred embodiment of the invention.
Specific embodiment
Below in conjunction with attached drawing, pass through the description to the preferred embodiment of the present invention, more clearly and completely elaboration The technical solution of invention.
The present invention proposes a kind of ecological recovery method of flyash stack yard, and this method comprises the following steps:
(1) side slope of fine coal dust heap is reinforced, the mode of reinforcing is that structural strengthening or nonmetallic materials braiding circle add Gu preventing fine coal dust heap from coming down by slope reinforcement;
(2) the covering improvement organoclay in the fine coal dust heap side slope reinforced, forms improvement organic soil layer or is known as having Machine plants layer;
Improveing organoclay has preferable soil property and higher soil fertility, can create for the growth of vegetation good Soil environment condition.Preferably, improve organic soil layer with a thickness of 100mm~150mm, can guarantee the long-term water and soil of organoclay in this way Be not lost, enable be planted in improvement organoclay in vegetation normal growth.
(3) it plants in improvement organic soil layer with fixing of soil and conservation of water;
Preferably, the Plant choosing transverse direction well developed root system, drought-enduring, salt resistance alkali of plantation, fast growing careless class, to be formed The surrounding vegetable layer being covered in improvement organoclay, improves the ecoscape in stockyard;
(4) the former earthing of fine coal dust heap top surface is improved, to achieve the purpose that getting fat is retained, on improvement earthing Planting plants form top surface vegetable layer;
As needed, thickness of earth covering can be increased under the premise of improveing to former earthing.Earthing improves depth according to plantation It is required that determining, general depth is 100mm~300mm, needs if any special plantation, can also increase conditioned soil depth or right Former earthing, which is averagely shallowly changed, or part is deep changes, to meet different plantation demands.The vegetation planted on improvement soil layer forms top The covering of face vegetable layer.
To the flyash stack yard of stable many years, can first it implement above-mentioned steps (4), then implementation steps (1) to (3).
In above-mentioned steps (1), fabric reinforcing layer includes several strenthening members, and strenthening member is muscle in high-strength light band Prefabricated component, the prefabricated component add a certain amount of auxiliary material, such as calcium lime powder, fibre using the flyash after innoxious as major ingredient Dimension, waste plastic silk ribbon etc., to improve the intensity of prefabricated component, innoxious flyash be sufficiently mixed after molding with auxiliary material formed it is prefabricated Part.The benefit designed in this way is: on the one hand, be utilized the characteristic of flyash, flyash alkalinity with higher, and quick lime It is solid that water-setting is met after powder mixing, hardness with higher, and light weight;On the other hand, the waste utilization of flyash is realized.It reinforces Component is by anchor pole and/or anchor build-in due in fine coal dust heap.
In the case where the side slope step height of fine coal dust heap is less than 3m and grade of side slope angle α less than 60 °, reinforcing layer is used Nonmetallic materials braiding circle reinforces the side slope of fine coal dust heap.Preferably, nonmetallic materials braiding circle reinforcing layer uses and has Machine/inorfil, plastics or plant stem weave, and weave loop diameter≤1m, are highly 100mm~150mm.According to need It wants, braiding circle can be fixed to each other with nylon rope etc..
As shown in Figure 1, the ecology fine coal dust heap according to obtained from above-mentioned ecological recovery method includes being located in the middle, being coated The fine coal dust heap 1 of lid is successively reinforced layer 2, improvement organic soil layer 3 and surrounding vegetable layer 4 around fine coal dust heap 1 and covers, In, reinforcing layer 2 improves organic soil layer 3 and is located at reinforcing layer 2 near fine coal dust heap 1, surrounding vegetable layer 4 farthest away from fine coal dust heap Between surrounding vegetable layer 4.The top surface of fine coal dust heap 1 is successively modified soil layer 5 and top surface vegetable layer covering 6, wherein conditioned soil Layer 5 directly overlays on the top surface of fine coal dust heap 1.
Only preferred embodiments of the present invention will be described for above-mentioned specific embodiment, and not to guarantor of the invention Shield range is defined.Under the premise of not departing from design concept of the present invention and scope, those skilled in the art Provided verbal description, attached drawing various modifications to made by technical solution of the present invention, substitution and improvement according to the present invention, It should belong to protection category of the invention.Protection scope of the present invention is determined by claim.

Claims (10)

1. a kind of ecological recovery method of flyash stack yard, which is characterized in that the ecological recovery method includes the following steps:
(1) side slope of fine coal dust heap is reinforced, the mode of reinforcing is that structural strengthening or nonmetallic materials braiding circle are reinforced;
(2) the covering improvement organoclay in the fine coal dust heap side slope reinforced, forms improvement organic soil layer;
(3) plantation forms the surrounding vegetable layer for surrounding fine coal dust heap with fixing of soil and conservation of water in improvement organic soil layer;
(4) the former earthing of fine coal dust heap top surface is improved, the planting plants on improvement earthing form top surface vegetable layer.
2. ecological recovery method as described in claim 1, which is characterized in that first real to the flyash stack yard of stable many years It applies above-mentioned steps (4), then implementation steps (1) to (3).
3. ecological recovery method as described in claim 1, which is characterized in that the structural strengthening includes several strenthening members, The strenthening member is muscle prefabricated component in high-strength light band, and the prefabricated component is by the way that quick lime is added in innoxious flyash It is formed after powder and fiber and/or the mixing of waste plastic silk ribbon.
4. ecological recovery method as described in claim 1, which is characterized in that be less than 3m in the side slope step height of fine coal dust heap And in the case that grade of side slope angle is less than 60 °, the side slope of fine coal dust heap is reinforced using nonmetallic materials braiding circle.
5. ecological recovery method as claimed in claim 4, which is characterized in that nonmetallic materials braiding circle using it is organic/ Inorfil, plastics or plant stem weave, and weave loop diameter≤1m, are highly 100mm~150mm.
6. ecological recovery method as described in claim 1, which is characterized in that the plant of the surrounding vegetable layer and top surface vegetable layer Object select lateral well developed root system, drought-enduring, salt resistance alkali, fast growing careless class.
7. the ecological flyash stack yard obtained according to the ecological recovery method of flyash stack yard as described in claim 1, including Capped fine coal dust heap, which is characterized in that layer, improvement organic soil layer and surrounding are successively reinforced around the fine coal dust heap Vegetable layer covering, wherein the reinforcing layer is near the fine coal dust heap, and the surrounding vegetable layer is farthest away from the flyash Heap, for the improvement organic soil layer between the reinforcing layer and the surrounding vegetable layer, the reinforcing layer is fabric reinforcing layer Or nonmetallic materials braiding circle reinforcing layer, the top surface of the fine coal dust heap are successively modified soil layer and the covering of top surface vegetable layer, Wherein, the improvement soil layer directly overlays on the top surface of the fine coal dust heap.
8. ecology flyash stack yard as claimed in claim 7, which is characterized in that in the side slope step height of the fine coal dust heap Less than 3 meters and in the case that grade of side slope angle is less than 60 °, the reinforcing layer is using nonmetallic materials braiding circle reinforcing layer.
9. ecology flyash stack yard as claimed in claim 8, which is characterized in that the nonmetallic materials braiding encloses reinforcing layer and is Organic/inorganic fiber, plastics or plant stem braiding circle reinforcing layer.
10. ecology flyash stack yard as claimed in claim 7, which is characterized in that the fabric reinforcing layer includes that several add Though component, the strenthening member is to wrap up fiber and/or waste plastic silk ribbon shape by the mixture of flyash and calcium lime powder At high-strength light band in muscle prefabricated component, the strenthening member is by anchor pole and/or anchor build-in due in the fine coal dust heap.
CN201910028311.1A 2019-01-11 2019-01-11 A kind of ecological recovery method and its ecological flyash stack yard of flyash stack yard Pending CN109644781A (en)

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN115362886A (en) * 2022-08-25 2022-11-22 国家电投集团江西中业兴达电力实业有限公司 Fly ash stacking and dust raising prevention method

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1178626A (en) * 1996-10-04 1998-04-15 郝志邦 Anti-pollution ecological treatment method for ash storing field in power station
CN102182195A (en) * 2011-02-01 2011-09-14 深圳市胜义环保有限公司 Weathering preventing and reinforcing method and structure of mudstone side slope of waste residue storage yard
CN103806454A (en) * 2014-02-14 2014-05-21 北京矿冶研究总院 Method for pollution control and vegetation recovery of metal sulfide ore solid waste storage yard
CN103821156A (en) * 2014-03-07 2014-05-28 深圳市万信达生态环境股份有限公司 Ecological protection structure and method suitable for ardealite storage yard
CN203716135U (en) * 2014-02-12 2014-07-16 北京矿冶研究总院 Ecological restoration layer for sintering process red mud storage yard slope
CN204208877U (en) * 2014-11-13 2015-03-18 赵立虎 A kind of coal-burning power plant stores up grey field and industrial tailings dust-arrest device
CN205475261U (en) * 2016-04-01 2016-08-17 四川电力设计咨询有限责任公司 Ash dam structure of power plant

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1178626A (en) * 1996-10-04 1998-04-15 郝志邦 Anti-pollution ecological treatment method for ash storing field in power station
CN102182195A (en) * 2011-02-01 2011-09-14 深圳市胜义环保有限公司 Weathering preventing and reinforcing method and structure of mudstone side slope of waste residue storage yard
CN203716135U (en) * 2014-02-12 2014-07-16 北京矿冶研究总院 Ecological restoration layer for sintering process red mud storage yard slope
CN103806454A (en) * 2014-02-14 2014-05-21 北京矿冶研究总院 Method for pollution control and vegetation recovery of metal sulfide ore solid waste storage yard
CN103821156A (en) * 2014-03-07 2014-05-28 深圳市万信达生态环境股份有限公司 Ecological protection structure and method suitable for ardealite storage yard
CN204208877U (en) * 2014-11-13 2015-03-18 赵立虎 A kind of coal-burning power plant stores up grey field and industrial tailings dust-arrest device
CN205475261U (en) * 2016-04-01 2016-08-17 四川电力设计咨询有限责任公司 Ash dam structure of power plant

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN115362886A (en) * 2022-08-25 2022-11-22 国家电投集团江西中业兴达电力实业有限公司 Fly ash stacking and dust raising prevention method
CN115362886B (en) * 2022-08-25 2024-06-04 国家电投集团江西中业兴达电力实业有限公司 Fly ash stacking dust-raising prevention method

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