阅读说明：本技术 一种河湖治理方法 (River and lake treatment method ) 是由 翁汉林 周威榕 孙波 于 2019-10-15 设计创作，主要内容包括：本发明公开了一种河湖治理方法,挖取河湖底的淤泥,并与固化剂搅拌混合,用以得到复合淤泥；通过压制模具将复合淤泥压制成型压制块,并对压制块进行养护；将压制块安装在位于河湖一侧的堤坝的边坡上,用以形成边坡护面；通过上述治理方法对河湖进行治理,既能够清除河湖底的淤泥,又能够将淤泥制成压制块,并安装在位于河湖一侧的堤坝的边坡上,用以形成边坡护面,从而实现淤泥的就近资源化利用,无需外运、填放,也无需额外购置河道湖泊护面安装的材料,从而大大降低了河湖治理的成本。(The invention discloses a river and lake treatment method, which comprises the steps of digging sludge at the bottom of a river and lake, and stirring and mixing the sludge with a curing agent to obtain composite sludge; pressing the composite sludge into a pressed block through a pressing mould, and maintaining the pressed block; installing the pressed blocks on the side slope of the dam on one side of the river and lake to form a side slope protection surface; the river and lake are treated by the treatment method, sludge at the bottom of the river and lake can be removed, the sludge can be made into pressed blocks and is arranged on the side slope of the dam on one side of the river and lake to form a side slope protective surface, so that the sludge is recycled nearby, transportation and filling are not needed, and extra materials for mounting the river and lake protective surfaces are not needed, so that the cost for treating the river and lake is greatly reduced.)

1. A river and lake treatment method is characterized in that: which comprises the following steps: digging sludge at the bottom of a river or lake, and stirring and mixing the sludge with a curing agent to obtain composite sludge; pressing the composite sludge into a pressed block through a pressing mould, and maintaining the pressed block; and installing the pressed blocks on the side slope of the dam on one side of the river and lake to form a side slope protection surface.

2. A river and lake treatment method according to claim 1, wherein: the curing agent comprises cement, sodium silicate, sodium chloride and sodium sulfate; and the weight of the cement is 3% -10% of that of the sludge, and the weight of the sodium silicate, the sodium chloride and the sodium sulfate is 2% -10% of that of the cement.

3. A river and lake treatment method according to claim 2, wherein: the curing agent also comprises fly ash, and the weight of the fly ash is 2-10% of that of the sludge.

4. A river and lake treatment method according to claim 1, wherein: and (3) dredging the sludge at the bottom of the river or lake to a sludge stirrer by adopting dredging equipment, and removing lumps doped in the sludge by using a vibration grid on the sludge stirrer.

5. A river and lake treatment method according to claim 4, wherein: the solid content of the sludge after the removal of the blocks is 15-60%.

6. A river and lake treatment method according to claim 4, wherein: the curing agent is conveyed into the sludge stirrer through the pumping device and is stirred and mixed with the sludge.

7. A river and lake treatment method according to claim 4, wherein: the composite sludge is conveyed to a pressing die through a plunger pump in the sludge stirrer.

Technical Field

The invention relates to the technical field of river and lake treatment, in particular to a river and lake treatment method.

Background

River and lake treatment comprises removing sludge at the bottom of river and lake and building a dam at one side of river and lake.

At present, the sludge at the bottom of rivers and lakes is treated by adopting a mode of digging out foreign transport and throwing into the sea or land landfill. Obviously, urban land resources are scarce, sufficient fields cannot be provided for dissolving the sludge, the expenses of sludge removal, dehydration, outward transportation, field stacking and the like are extremely high, and the cost of river and lake treatment is greatly increased.

In addition, when the dam is constructed, the block stones are also needed to be purchased as the material for protecting the side slope of the dam, thereby increasing the cost for river and lake treatment.

In view of the above, the present inventors have made extensive studies and research on various defects and inconveniences caused by the above-mentioned incomplete improvement in river and lake treatment design.

Disclosure of Invention

The invention aims to provide a low-cost river and lake treatment method.

In order to achieve the above purpose, the solution of the invention is:

a river and lake treatment method comprises the following steps: digging sludge at the bottom of a river or lake, and stirring and mixing the sludge with a curing agent to obtain composite sludge; pressing the composite sludge into a pressed block through a pressing mould, and maintaining the pressed block; and installing the pressed blocks on the side slope of the dam on one side of the river and lake to form a side slope protection surface.

Preferably, the curing agent comprises cement, sodium silicate, sodium chloride and sodium sulfate; and the weight of the cement is 3% -10% of that of the sludge, and the weight of the sodium silicate, the sodium chloride and the sodium sulfate is 2% -10% of that of the cement.

Preferably, the curing agent further comprises fly ash, and the weight of the fly ash is 2% -10% of that of the sludge.

Preferably, the silt at the bottom of the river or lake is dug by a dredging device to a silt stirrer, and lumps doped in the silt are removed through a vibration grid on the silt stirrer.

Preferably, the solids content of the sludge after removal of the cake is 15% to 60%.

Preferably, the curing agent is delivered to the sludge blender by a pumping device and is blended with the sludge blender.

Preferably, the composite sludge is delivered to the compaction die by a plunger pump in a sludge blender.

After the scheme is adopted, the river and lake are treated by the treatment method, sludge at the bottom of the river and lake can be removed, the sludge can be made into pressed blocks and installed on the side slope of the dam on one side of the river and lake to form a side slope protective surface, so that the nearby resource utilization of the sludge is realized, the outward transportation and the filling are not needed, and the additional purchase of materials for installing the river and lake protective surfaces is not needed, so that the cost for treating the river and lake is greatly reduced.

Detailed Description

In order to further explain the technical solution of the present invention, the present invention is explained in detail by the following specific examples.

The invention relates to a preferable embodiment of a river and lake treatment method, which comprises the following steps:

digging sludge at the bottom of a river or lake, and stirring and mixing the sludge with a curing agent to obtain composite sludge; the composite sludge is pressed into a pressed block through a pressing die, and the pressed block is maintained, so that the pressed block is hardened and formed and has strength, in the embodiment, after the pressed block is demoulded, the pressed block is maintained for about 28 days, and the strength of the pressed block reaches more than 5 MPa; and installing the pressed blocks on the side slope of the dam on one side of the river and lake to form a side slope protection surface.

Preferably, the curing agent comprises cement, sodium silicate, sodium chloride and sodium sulfate; and the weight of the cement is 3% -10% of that of the sludge, and the weight of the sodium silicate, the sodium chloride and the sodium sulfate is 2% -10% of that of the cement. The curing agent is an alkali-activated cementing material, and after being mixed with sludge containing certain moisture, a series of physical and chemical reactions occur, high-valence ions in the solution can change the surface charge characteristics of sludge particles, reduce the repulsive force among the sludge particles, destroy the water absorption film of the sludge particles, improve the adsorption force among the sludge particles, ensure that the moisture content in the sludge reaches stable balance, simultaneously form crystal salt, form a large number of needle-shaped crystals rich in crystal water in the sludge, and form a strength framework among the gaps of the sludge particles; secondly, hydrate is filled in the strength framework, so that the curing system is further compact; the curing agent and part of the sludge particles take part in chemical reaction, so that the reinforced field has extremely strong durability, waterproofness and stability.

Preferably, the curing agent further comprises fly ash, and the weight of the fly ash is 2% -10% of that of the sludge. By adding the fly ash, the curing effect of the curing agent is not influenced, the using amount of cement can be reduced, and the production cost of the curing agent is reduced.

Preferably, the sludge at the bottom of the river or lake is dug into a sludge stirrer by using dredging equipment, and lumps with large particle sizes, such as stones and the like doped in the sludge, are removed through a vibration grid on the sludge stirrer.

Preferably, the solids content of the sludge after removal of the cake is 15% to 60%. In the embodiment, water is added into the sludge after the removal of the lumps, so that the solid content of the sludge after the removal of the lumps is controlled to be 15% -60%.

Preferably, the curing agent is delivered to the sludge blender by a pumping device and is blended with the sludge blender.

Preferably, the composite sludge is delivered to the compaction die by a plunger pump in a sludge blender.

The key point of the invention is that the river and lake are treated by the treatment method, the sludge at the bottom of the river and lake can be removed, and the sludge can be made into pressed blocks and arranged on the side slope of the dam on one side of the river and lake to form a side slope protective surface, so that the sludge can be recycled nearby, transportation and filling are not needed, and additional materials for mounting the river and lake protective surfaces are not needed, so that the cost for treating the river and lake is greatly reduced.

The foregoing description of specific exemplary embodiments of the invention has been presented for the purposes of illustration and description and is not intended to limit the invention to the precise form disclosed, and obviously many modifications and variations are possible in light of the above teaching. The exemplary embodiments were chosen and described in order to explain certain principles of the invention and its practical application to enable one skilled in the art to make and use various exemplary embodiments of the invention and various alternatives and modifications as may be appropriate to those skilled in the art without departing from the scope of the invention.