JP3047269U - Dredging mud treatment equipment - Google Patents

Abstract

(57) [Summary] [Purpose] Dredging mud that can be easily handled at various sites where dredging is required, promotes the decomposition of sludge, prevents odors and other pollution, and improves the soil quality of landfills. Of the present invention. In a concrete pump truck, a gas injection pipe provided with a device sufficient for injecting and mixing an oxygen-containing gas of 10% by volume or more of the material in a pipe section from a material introduction section to a boom. Attach.

Description

[Detailed description of the invention]

[0001]

[Industrial applications]

 The present invention relates to a method and an apparatus for transporting and discharging dredged mud such as sludge, and is also used for environmental conservation purposes.

[0002]

[Prior art]

 In dredging work to remove sediment and sludge deposited on the bottom of rivers, lakes, marshes, sea areas, etc., dredged soil that has been taken out has been widely collected and transferred to a large-sized mud transport purge. Recently, in order to further improve mobility, a method has been proposed and implemented, such as a method in which fluid mud is previously sent alternately into two pumping tanks by a sorter or pulverizer beforehand and pumped on a large scale. I have.

On the other hand, as a small-scale method, a method is used in which mud dredged by a power shovel or the like is carried into a large hopper or the like, and then loaded into a dump and transported to a discharge site.

[0004]

[Problems to be solved by the invention]

 There are many types of places where sludge and sludge actually accumulate and need dredging, many of which are relatively small, such as swamps and rivers, and the large-scale method described above is applied. However, there was a problem that it could not make a small turn, and instead the cost of transporting equipment and other costs increased.

[0005] In such a pumping method, a material having a high mud content has too high a resistance and is unreasonable, resulting in a high moisture content, and landfilling of the material results in deterioration of soil quality and generation of offensive odor. And so on, which could cause secondary pollution.

[0006] Also, a method of removing mud on a small scale and transporting it by dumping is extremely inefficient because there is no mechanical device for efficiently performing the same, and at the same time, it also has a bad smell during transportation and a landfill. Had unsolved problems in terms of soil quality. The purpose of the present invention is to solve such problems.

[0007]

[Means for Solving the Problems]

 The present invention makes it possible to use a concrete pump truck with a boom, which could not be used except for fresh concrete, for sludge dredging, where contaminants are separated and removed in advance using a conventional sorting hopper, etc. The dredged mud is introduced into this concrete pump truck, and oxygen-containing gas such as air is supplied to another pipe (pipe) through a pipe section provided as a passage for ready-mixed concrete from the inlet to the boom. After a large amount is injected and mixed into the mud through a nozzle, it is introduced into a transport vehicle (tank lorry) ahead through a boom pumping tube, and is transported and discharged (landfilled).

The oxygen-containing gas to be injected and mixed at this time generally means air, but if necessary, it may particularly mean artificially mixed oxygen at a high concentration.

Further, the gas is injected while dispersing the gas into as small bubbles as possible by attaching a plurality of pipes and nozzles (gas injection pipes) as shown in FIG. 2 to the pipe of the concrete pump truck. However, the injection amount is such that at least 10% by volume or more, preferably equivalent volume% or more of the mud as the feed material can be injected.

[0010] Further, if necessary, aerobic or aerobic-changing microorganisms are added and mixed into the dredged mud before being introduced into the pump truck in advance.

As the aerobic microorganisms, BSK bacteria (similar fungi similar to Bacillus subtilis), agarie bacteria, and other effective microorganisms such as “EM” which are resistant to mud such as sludge, etc., are desirable and can be changed to aerobic. Microorganisms, such as yeasts and lactic acid bacteria, that anaerobically respirate (ferment) in an oxygen-poor environment, but transform themselves to aerobic respiration in an oxygen-rich environment Can be

[0012]

【Example】

 If the example of the apparatus of this invention is demonstrated with drawing, the mud (3) of sludge etc. will be dredged with the power shovel (2) of the barge (1), and it will be thrown into the conventional big plate (4) for sorting, When this is introduced into the feed pipe (7) provided in the concrete pump truck (6) through the small dish for stirring (5), as shown in FIG. A small bulge is formed at the joint part, whose diameter becomes larger as it splits, into which several gas injection pipes (8) are inserted, and from which an oxygen-containing gas pumped from an accompanying compressor or an oxygen tank (not shown). The gas (9) is blown in substantially the same amount as the mud, and the pipe (7) reaches the boom (10) as usual, and is connected to the tank lorry (11) through a long connecting pipe as necessary. Soiled mud shall be transported and treated. However, the present invention is not limited to this example.

[0013]

[Action]

 Generally, dredged sludge mud is deposited on the water floor for a long time, so that only anaerobic microorganisms that can adapt to an oxygen-deficient environment predominantly inhabit, and the decomposition of organic matter by such anaerobic bacteria is At the same time as being extremely inefficient, the products still remain in secondary organic matter, which, even after dredging, emits offensive odors and is a source of environmental pollution.

[0014] On the other hand, the concrete pump truck with a boom described above is for pumping ready-mixed concrete with sufficient fluidity, and generally the restoring force of a pumping tube crushed by a roller in a vacuum in a drum. Although it is very light and highly mobile, the pipes at the boom are considerably elongated and cannot be used for pumping dredged mud other than fresh concrete. It is.

According to the present invention, however, the concrete pump truck is used as a dredging mud pumping device, and the mud quickly obtains an aerobic environment, thereby providing a countermeasure against sludge, and at the same time, as described above. Prevent next pollution.

[0016] That is, the dredged mud is introduced into the concrete pump truck, and in the passage (pipe section) from there to the boom, a large amount of oxygen-containing gas (air) is injected and mixed in the form of fine bubbles. Then, the oxygen in the bubbles is immediately dissolved in the water of the mud and changed to a material rich in dissolved oxygen, and at the same time, the bubbles lower the bulk specific gravity of the mud and add a bearing effect to connect to the boom ahead. It provides enough fluidity to easily pass through elongated pipes.

[0017] Therefore, it is easy to introduce the hopper into a tank lorry or the like that is on standby, and it is possible to transport the hopper in a sealed state different from that of the dump truck. Is done.

On the other hand, since the mud has changed to an environment in which oxygen is abundantly dissolved, aerobic microorganisms added or originally present in a nap state there are activated and multiplied, or even when anaerobic. Due to the increased oxygen, mitochondria rapidly increase and become aerobic and divide and proliferate, and the aerobic metabolism is 20 times more efficient than anaerobic metabolism (fermentation), and the residual organic matter is converted into the final products water and carbon dioxide. Decomposes to carbon.

Since the process of mixing oxygen is performed in the only inevitable passage (tube), it is much more efficient and complete than the method of stirring and mixing the water bottom, and the effect is Even after being discharged to the ground or landfilled, the decomposition of organic matter is greatly promoted, thereby reducing odors or providing soil suitable for plant culture.

In addition, since fluidity is enhanced by gas instead of moisture, sludge having a high mud content (small moisture) can be transported, and therefore, biological treatment, chemical treatment, and soil strength can be carried out. It will be easier to control the improvement, etc., or it will be easier to perform landfilling and backfilling by the underwater solidification method.

[0021]

[Effects of the Invention] As described above, according to the present invention, a conventional concrete pump truck can be used, and therefore, it is extremely light, highly mobile, and has a small transportation load on various sites. At the same time, the dredged mud changes to one with a high oxygen concentration, making it an environment in which aerobic bacteria predominate, rapidly decomposing residual organic matter, preventing odors and other pollution, and improving landfill soil quality. Furthermore, since it is possible to convey mud with a low moisture content and a high mud content, it has effects such as being suitable for underwater solidification landfill and backfilling.

[Brief description of the drawings]

FIG. 1 is a partial cross-sectional side view showing an outline of the implementation of the present invention.

FIG. 2 is a sectional view showing a main part of the present invention.

[Explanation of symbols]

1 ‥‥ barge 2 ‥‥ power shovel 3 ‥‥ mud 4 ‥‥ sorting large plate 5 ‥‥ stirring small plate 6 ‥‥ concrete pump truck 7 ‥‥ transmission pipe 8 ‥‥ gas injection pipe 9 ‥‥ oxygen containing gas 10 ‥‥ Boom 11 ‥‥ Tank lorry

Claims (1)

[Utility model registration claims] In a concrete pumping truck, in a pipe feeding section from a material introduction section to a boom, 10% of the material is introduced.
An apparatus for treating dredged mud, comprising: a gas injection pipe provided with a device sufficient for injecting and mixing an oxygen-containing gas of at least volume%.