JP2554141B2 - Mud solidifying agent mixing processing equipment - Google Patents

Description

Description: TECHNICAL FIELD The present invention relates to a mud solidifying agent mixing and processing device for mixing hydrated mud with lime and a cement-based solidifying agent for solidification.

[Prior Art] Conventionally, when soft soil containing water such as sludge or dredged mud is used for landfill, lime and cement-based solidifying agent are scattered after landfill in order to dry the landfill quickly and develop necessary strength. Also, various types of mixing stirrers are used to mix and stir to solidify.

In addition, there is a method of conveying mud by placing soft soil in a pressure tank and pressure-fusing it to a remote place via a mud pipe connected to the pressure tank with compressed air injected into the pressure tank. It has also been attempted to add the solidifying agent to the pressure tank, mix and stir with the mud in the tank, and then feed the mixture.

[Problems to be Solved by the Invention] However, in the former solidification treatment method, transportation and mixing treatment of soft soil are performed separately, and it is difficult to spread the solidification agent uniformly in a wide landfill site, and the solidification is performed. Variations may occur in mud.

On the other hand, the latter mixing method solves the drawbacks of the above method in which the solidifying agent is uniformly mixed with the mud to cause no variation in the solidified mud, and the soft soil can be transported and mixed at the same time. However, after the work was completed, it was necessary to perform a troublesome work such as washing the inside of the tank and the mud pipe with water to prevent the mud from solidifying and adhering to the inner wall in these devices.

The object of the present invention is to make use of the feature of the mud pressure feeding system that pressure feeds soft mud to a remote place through the mud feeding pipe, and after finishing the mud pressure feeding process, wash the mud pressure feeding system tank or use the mud feeding pipe for its entire length. It is intended to provide a mud solidifying agent mixing / processing apparatus capable of uniformly mixing a solidifying agent with mud without the need for washing and cleaning.

[Means for Solving the Problems] A mud solidifying agent mixing and processing device for achieving the object of the present invention utilizes a carrier flow of mud that is pressure-fed by compressed air in a mud pipe to remove the mud solidifying agent. It is characterized by mixing in a mud pipe.

A typical configuration of the mud solidifying agent mixing treatment device for achieving the object of the present invention is, in the mud pumping system in the mud pumping system for pumping mud by compressed air through the mud pipe,
A mud solidification agent mixing treatment device for injecting a mud solidification agent, comprising a solidification agent supply means for supplying the solidification agent, and the solidification agent is supplied from the solidification agent supply means into a closable container, and a predetermined amount of the solidification agent. A solidifying agent quantitative supply means for cutting off the supply of the solidifying agent when the supply is detected, and a solidifying agent pressure feeding path for guiding the pressurized air from the compressed air source into the container to pressure feed the solidifying agent in the container into the mud pipe. A pressurizing valve that controls the supply of compressed air from the compressed air source to the container, a discharge valve that controls the supply of the solidifying agent from the container to the solidifying agent pressure-feeding path, and a start of pressure feeding of mud from the mud pressure feeding system. And a control means for controlling to open the pressurizing valve and the discharge valve when the above is detected.

[Operation] The mud solidifying agent mixing treatment device configured as described above opens the pressurizing valve and the discharge valve when the mud is pumped, so that the solidifying agent is sent to the mud pipe through the solidifying agent pressure feeding path. The pouring and solidifying agent stirs and mixes with the mud to be pressure-fed in the mud-sending pipe in a complicated flow mode such as a dense flow or a plug flow to solidify the mud.

[Examples] The present invention will be described in detail below based on the examples shown in the drawings.

FIG. 1 is a schematic view showing an embodiment of a mud solidifying agent mixing treatment apparatus according to the present invention.

1 has two mud pressure feed tanks 2 for accommodating soft mud of sedimented mud dredged in rivers etc., and mud discharge valve 3 for each tank 2
In the mud pressure feeding system in which the mud feeding pipe 4 is connected via, the compressed air from the compressor (not shown) is supplied into the tank via the tank pressurizing valve (not shown) provided in each tank, The mud is pressure-fed to the cyclone 5 at the tip through the mud pipe 4.

The mud pressure feeding system 1 alternately feeds mud into the two tanks 2 and supplies compressed air to feed the mud substantially continuously, and the mud flows in the mud feed pipe 4 in a dense flow. , Is discharged by pressure while repeating complicated flow patterns such as plug flow.

The cyclone 5 is used to drop the mud pumped onto the bed of a mud carrier vehicle such as a dump truck, or to drop the mud directly placed in a landfill. Since it is fast, mud discharged from the mud pipe scatters as it is, so a plurality of spiral blades 5b are arranged at equal intervals in the circumferential direction on the inner wall surface of the cylindrical cyclone body 5a with an open lower part. It is fixed in. That is, the high-speed mud discharged from the mud pipe 4 hits the inner wall surface of the cyclone main body 5a, and is swung downward by the blades 5b to reduce the speed and drop without flying.

6 is a mud solidifying agent treating apparatus according to the present embodiment, the main constitution of which is a solidifying agent silo 8 containing a large amount of powdery particulate mud solidifying agent 7 such as lime or cement, and a solidifying agent 7 from the solidifying agent silo 8. Fixed quantity tank 9 that holds a fixed amount, fixed quantity tank 9
Solidifying agent pressure feed pipe 10 for guiding solidifying agent 7 inside to said mud sending pipe 4, compressor 11 for generating compressed air, compressor
Main air pipe for supplying compressed air from 11 into the metering tank 9.
It is composed of 12.

The lower opening of the solidification agent silo 8 is connected to an automatic control type solidification agent injection valve 13, and the lower opening of the solidification agent injection valve 13 is connected to the upper opening of the metering tank 9. The solidifying agent silo 8 is supported by a supporting frame (not shown) so that the weight of the solidifying agent silo 8 is not added to the metering tank 9. The fixed quantity tank 9 is designed so that the weight of the solidifying agent fed from the solidifying agent silo 8 is detected by the calibration load cell 14,
An automatic control solidifying agent discharge valve 15 is attached to the lower opening, and the discharge side of the solidifying agent discharge valve 15 is connected to the middle of the solidifying agent pressure feed pipe 10.

The solidifying agent pressure feeding pipe 10 is connected to the compressor 11 at one end and to the position near the pressure feeding end of the mud sending pipe 4 at the other end, for example, at a position of 10 to 20M, and the solidifying agent discharge valve 15 and the compressor 11 are connected. A venturi 16 is provided between the venturi 16 and the venturi 16 is connected to the main air pipe 12 via an atmosphere open pipe 18 having an atmosphere open valve 17. The connection position of the atmosphere open pipe 18 to the main air pipe 12 is closer to the metering tank 9 than the pressurizing valve 19 described later.

The main air pipe 12 is provided with a pressurizing valve 19 of an automatic control system,
By opening the valve, compressed air is supplied into the metering tank 9. Further, at the other end of the solidifying agent pressure feeding pipe 10, an automatic control type emergency shutoff valve 20 is provided which is closed when mud flows backward from the mud feeding pipe 4.

In addition, each valve of the above-mentioned mixing processing device is controlled to be opened and closed by a control device (not shown) using information from a pressure sensor that detects the pressure in the tank in the mud pressure feeding system and opening and closing information of the tank pressurizing valve as input information. .

Further, the quantitative value V (kg) of the solidifying agent 7 accommodated in the fixed amount tank 9 at one time is the effective pressure feeding amount (Q m ³ ) in one pressure feeding tank 2 and the required solidifying agent addition amount (X kg / m ³ )
Therefore, V = X × Q.

The structure of this embodiment has been described above. The operation of the control device will be described below.

First, the solidifying agent feeding valve 13 is opened, and the solidifying agent 7 is supplied from the solidifying agent silo 8 into the fixed amount tank 9 in preparation for feeding the solidifying agent to the mud feed pipe 4.

When the calibration load cell 14 detects the quantitative value V (kg), the solidifying agent injection valve 13 is closed.

Then, when, for example, opening information of the tank pressurizing valve that informs the pressurizing of the mud is input from the mud pressing system 1, the pressurizing valve
19 is opened and the discharge valve 15 is opened, and the solidifying agent 7 in the fixed quantity tank 9 is pressure fed into the mud feeding pipe 4 through the solidifying agent pressure feeding pipe 10. At that time, the pressure of the solidifying agent 7 is regulated so that the solidifying agent 7 is fed substantially evenly from the time when the first mud reaches the feeding position to the mud feeding pipe 7 to the time when all the mud is pumped.

The mud sent under pressure in the mud pipe 4 is as described above.
The solidification agent is uniformly stirred and mixed with the mud because it is sent under pressure by repeating a complicated flow pattern, and the cyclone 5
It is solidified and discharged before reaching.

Then, when the stop information of mud pressure feeding is input, the discharge valve
15, the pressurizing valve 19 is closed, but since the compressed air is constantly supplied from the compressor 11 to the solidifying agent pressure feeding pipe 10, all the solidifying agent accumulated in the pipe is supplied to the mud feeding pipe to prevent clogging of the pipe. In addition to preventing it, it also prevents the reverse flow of mud from the mud pipe 4.

On the other hand, when the compressor 11 is stopped, the control device is abnormal, or the like, the emergency stop valve 20 is closed to prevent the reverse flow of the mud from the mud pipe 4.

When the pressure release valve 19 is closed and then the atmosphere release valve 17 is opened, the metering tank 9 and the venturi 16 communicate with each other through the atmosphere release pipe 18. Here, since the compressed air flows from the compressor 11 to the solidifying agent pressure-feeding pipe 10 in the venturi 16, the air in the atmosphere open pipe 18 in the venturi 16 flows from the metering tank 9 side to the venturi 16 side. The solidifying agent pressure feed pipe 10 and the mud feed pipe 4 are opened to the atmosphere side. As a result, the inside of the fixed amount tank 9 is in an atmospheric pressure state or a depressurized state as compared with the solidifying agent silo 8, and the solidifying agent 7 in the solidifying agent silo 8 is charged into the fixed amount tank 9.
Then, the solidifying agent injection valve 13 is opened again and the same operation is repeated.

As a result of carrying out the mixing treatment test using the apparatus of this example configured as described above using the silt soft weak soil, it was confirmed that the uniaxial compressive strength exhibited approximately the same strength as the indoor mixed soil.

It was also proved that the solidifying agent injection position was 10 to 20 M from the mud pipe discharge port, and the mixing effect was sufficiently enhanced.

In the above-mentioned examples, as the solidifying agent, powdered particles such as lime and cement were used, but a slurry-like solidifying agent may be used, and in this case, the quantification of the slurry-like solidifying agent is performed by a flow meter. It should be measured.

Further, the injection of the solidifying agent may be started based on a signal from the sensor provided with a sensor for detecting the flow of mud in the mud transport pipe 4.

 FIG. 2 is a schematic view showing another embodiment.

In the above-described embodiment, the solidifying agent is measured in the metering tank 9 by the calibration load cell 14, and is directly supplied to the solidifying agent pressure feed pipe 10. However, in the present embodiment, the solidifying agent is further solidified in the lower portion of the metering tank 9. A solidifying agent pressure feeding tank 9'is provided through a solidifying agent feeding valve 13 ', and is connected to a solidifying agent pressure feeding pipe 10 through a solidifying agent discharge valve 15 provided in the solidifying agent pressure feeding tank 9', and is also a solidifying agent pressure feeding tank 9 '. The main air pipe 12 is connected to.

Therefore, according to the present embodiment, a fixed amount of the solidifying agent can be stored in the fixed amount tank 9 during the solidifying agent pressure feeding, and after the solidifying agent pressure feeding is completed, the solidifying agent can be immediately charged into the solidifying agent pressure feeding tank 9 ′. The solidifying agent can be mixed without interruption.

[Effect of the Invention] As described above, according to the present invention, the following effects can be obtained.

I: The solidifying agent and the mud can be uniformly stirred and mixed without the need for a machine for stirring and mixing the solidifying agent and the mud.

II: Since the solidifying agent is injected while the mud is being pressure-fed in the mud pipe, the mud can be transported and the solidified mud can be easily transported.

III: There is no need to wash, for example, the inside of the mud pressure-feeding tank after the solidification treatment as in the conventional case.

IV: In the conventional mixing processing method in the pressure-feeding tank, the amount of mud to be pressure-fed decreases as the amount of the solidifying agent added increases, but according to the present invention, when the pressure-feeding tank-type mud pressure-feeding system is used, The maximum capacity of the tank can be used to pump mud.

[Brief description of drawings]

FIG. 1 is a schematic view showing one embodiment of the mud solidifying agent mixing treatment apparatus according to the present invention, and FIG. 2 is a schematic view of another embodiment. 1: Mud pressure feed system, 2: Mud pressure feed tank 3: Mud discharge valve, 4: Mud pipe 5: Cyclone 6: Mud solidifying agent treatment device 7: Mud solidifying agent, 8: Solidifying agent silo 9: Quantitative tank, 10: Solidifying agent pressure feed pipe 11: Compressor, 12: Main air pipe 13: Solidifying agent input valve, 14: Calibration load cell 15: Solidifying agent discharge valve, 16: Venturi 17: Atmosphere opening valve, 18: Atmosphere opening pipe 19: Pressurizing valve, 20: Emergency stop valve.

Claims (4)

(57) [Claims] 1. A mud solidifying agent mixing treatment device for injecting a mud solidifying agent into the mud pressure feeding system in a mud pressure feeding system in which mud is pressure-fed by compressed air through the mud feeding pipe, wherein the solidifying agent is supplied. Means and a solidifying agent supply means for supplying a solidifying agent from the solidifying agent supply means into a container that can be sealed, and when the supply of the solidifying agent in a predetermined amount is detected, the solidifying agent quantitative supply means and a compressed air source in the container. From the container, a solidifying agent pressure-feeding path for guiding the compressed air from the container to pressure-feed the solidifying agent in the container into the mud pipe, a pressure valve for controlling the supply of the compressed air from the compressed air source to the container, and the container It comprises a discharge valve for controlling the supply of the solidifying agent to the solidifying agent pressure feeding path, and a control means for controlling to open the pressurizing valve and the discharge valve when the start of the pressure feeding of the mud is detected from the mud pressure feeding system. Mixed mud solidifying agent characterized by Processing device. 2. A mud solidification mixing treatment device for injecting a mud solidifying agent into a mud pressure feeding system in a mud pressure feeding system for feeding mud by compressed air through the mud feeding pipe, the solidifying agent supplying means supplying the solidifying agent. A solidifying agent quantitative supply means for measuring and storing a predetermined amount of the solidifying agent from the solidifying agent supply means, and a solidifying agent is supplied from the solidifying agent quantitative supply means into a sealable container, and a compressed air source is supplied in the container. From the compressed air from the compressed air source to the container, the solidification agent pressure-feeding path for pressure-feeding the solidification agent in the vessel into the mud pipe, and the addition of a compressed air source for controlling the supply of compressed air from the compressed air source to the vessel. A pressure valve, a discharge valve for controlling the supply of the solidifying agent from the container to the solidifying agent pressure feeding path, and a control for opening the pressure valve and the discharge valve when the mud pressure feeding system detects the start of feeding the mud. Consisting of control means A device for mixing mud solidifying agent, characterized by: 3. The mud solidifying agent mixing treatment apparatus according to claim 1, wherein compressed air is supplied to the solidifying agent pressure feeding path from the discharge side of the discharge valve. 4. The mud solidifying agent according to claim 1, 2 or 3, wherein a normally open type emergency shutoff valve is provided in the vicinity of a connection portion with the mud sending pipe in the solidifying agent pressure feeding path. Mixed processing equipment.