JPH11217988A - Solid mass measuring system and method in muddy water treatment system as well as control system and method using the - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a solid mass measuring system and method in a muddy water treatment system as well as a control system and method using them. SOLUTION: The flow rate of muddy water before solids are collected is measured (Step 2), the flow rate of cleaning water supplied to a primary pretreatment machine is measured (Step 4), and the flow rate of muddy water after the solids are collected is measured (Step 6). Then, the mass of collected solids is computed from these measurement results (Step 8), and when the mass of collected solids is smaller than a desired value (Step 10), the speed of a jack for a drilling machine is increased or the quantity of dispersing agent added to the muddy water is decreased for stable control of a cutting face (Step 14).

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to a system and method for measuring the amount of solids in a muddy water treatment system, and a control system and method using the same.

[0002]

BACKGROUND ART Conventionally, muddy water treatment systems have been widely used in various fields. In particular, in the field of muddy water method, for example, in a shaft excavation method using a stable liquid or a muddy shield method, mud water containing solids (soil, clay, etc.) and liquids (water, etc.) generated during excavation is treated. Is used to

In such a muddy water treatment system, when recovering solids, a vibrating sieve, a cyclone, a solid recovery machine having a rotating drum or the like is usually used, and the recovered solids are accumulated in a sediment hopper. Optimal control of the excavator,
In order to minimize the amount of chemicals added to the mud for stabilizing the face, it is necessary to accurately measure the solids recovery amount.

However, conventionally, since the amount of solids collected was measured by the earth and sand hopper or the amount of solids sent from the earth and sand hopper to the belt conveyor, the amount of solids collected was not an accurate measured amount, and the measuring device was also large.

If the amount of solid dissolved in muddy water can be measured at the same time, the amount of expensive additives added to the muddy water can be minimized, and more appropriate excavation control can be performed.

A first object of the present invention is to provide a system and a method for measuring a solid recovery amount capable of accurately measuring the amount of solids contained in drilling mud.

A second object of the present invention is to provide a control system and a method capable of appropriately controlling a solid recovery machine, an excavator, the amount of an additive to be added to muddy water, etc. based on the obtained solid amount. To provide.

[0008]

To achieve the above object, a solid amount measuring system according to claim 1 is provided in a flow path of muddy water containing a solid and a liquid, and separates and collects the solid from the muddy water. In a muddy water treatment system having a device, a first flow rate measuring device that is provided upstream of the solid recovery device and measures the flow rate of the muddy water in an upstream flow path, and is provided downstream of the solid recovery device. A second flow rate measuring device that measures the flow rate of the mud in the downstream flow path, a mud flow rate determined by the first flow rate measuring device, and a mud flow rate determined by the second flow rate measuring device. And a computing device for measuring a recovery amount of the solid separated and recovered from the muddy water based on the difference between the two.

According to the present invention, the amount of solid recovered can be easily and accurately measured by calculating the difference between the amount of mud supplied to the solid recovery device and the amount of mud discharged after solid recovery. .

[0010] Here, "solid" refers to, for example, sand,
Refers to a collection of reki, clay, etc.

The invention according to claim 2 is characterized in that, in claim 1, the first flow measurement device and the second flow measurement device are provided near the solid recovery device. I do.

According to the present invention, since there is almost no time lag between the time of collecting solids and the time of measuring muddy water, the amount of solids can be accurately measured.

[0013] Further, the invention according to claim 3 is based on claim 1,
In any one of 2, the solid flow rate measuring device is provided upstream of the first flow rate measuring device, and measures a flow rate of the solid contained in the muddy water in an upstream flow path,
The arithmetic device is configured to measure a dissolved amount of the solid dissolved in the muddy water based on a difference between the solid flow rate measured by the solid flow rate measuring device and the solid recovered amount. And

According to the present invention, the amount of solid dissolved in the muddy water can be measured while the muddy water flows from the solid flow rate measuring device to the solid collecting device. The solid flow rate measuring device is preferably provided in the upstream flow path near the face.

Here, the "solid flow rate measuring device" radiates radio waves into muddy water, receives radio waves propagating through the muddy water, calculates the density of the solid based on the reception level, and calculates the flow rate of the solid from the density. Can be applied.

[0016] Further, the invention according to claim 4 is based on claims 1 to 5.
In any one of 3, the solid recovery apparatus is provided in the flow path of the muddy water, and measures a separation path for separating the solid and the liquid, a cleaning unit for cleaning the separation path, and a supply amount of the cleaning liquid. Cleaning liquid amount measuring means, and the arithmetic unit includes a supply flow rate obtained by adding a cleaning liquid supply amount determined by the cleaning liquid amount measurement means to a muddy water flow rate determined by the first flow rate measuring apparatus, and The apparatus is characterized in that the amount of the solid separated and recovered from the muddy water is calculated based on the difference from the muddy water flow rate obtained by the second flow rate measuring device.

According to the present invention, the use of the cleaning liquid to enhance the solid recovery effect enables the calculation taking into account the amount of the cleaning liquid to be performed even when the muddy water containing the solid and the cleaning liquid are mixed, so that the solid amount can be accurately calculated. Can be measured.

Further, a control system according to a fifth aspect is based on the solid amount measurement system according to any one of the first to fourth aspects, and based on at least one of the measured solid recovered amount and the solid dissolved amount. A solid-state recovery control device for controlling the solid-state recovery device.

According to the present invention, the amount of solid recovered can be changed immediately by controlling the solid recovery device based on at least one of the measured amount of solid recovered and the amount of solid dissolved.

According to a sixth aspect of the present invention, in the fifth aspect, there is provided a chemical addition control device for controlling a chemical addition amount to muddy water supplied to the face based on the measured solid recovery amount. And

According to the present invention, appropriate muddy water excavation can be performed with a smaller amount of medicine by controlling the amount of medicine added based on the accurately measured solid recovery amount. Therefore, resource saving and cost reduction can be realized. In addition, as a chemical | medical agent, there exist a thickener which raises the viscosity of muddy water, a dispersing agent which lowers the viscosity of muddy water, a dissolution inhibitor which suppresses the dissolution of solids in muddy water, and the like.

[0022] Further, the invention according to claim 7 is based on claim 5,
6. In any one of the above 6, further comprising a dissolution inhibitor addition control device for controlling a dissolution inhibitor addition amount to muddy water sent from the face to the solid recovery device based on the measured solid dissolution amount. The agent addition control device is configured to add the dissolution inhibitor when the amount of the solid dissolved is larger than a desired value.

According to the present invention, when the dissolution rate of solids in muddy water is high, by adding a dissolution inhibitor to the muddy water,
The dissolution rate can be reduced and the solids recovery rate can be increased.

Further, the invention described in claim 8 is the invention according to claims 5 to
7. The apparatus according to any one of 7 to 7, further comprising a digging control device that controls the digging machine based on at least one of the measured solid recovery amount and the solid dissolution amount.

According to the present invention, the excavator can be controlled more accurately by controlling the excavator based on the accurately measured solid recovery amount. Thereby, the solid recovery amount can be increased, and the solid recovery rate can be improved.

The control of the excavator includes changing the jack speed, bit elongation, cutter rotation speed, bit angle, and the like.

[0027] The ninth aspect of the present invention is the fifth aspect of the present invention.
In any one of Items 8, the solid recovery device is a primary pretreatment device used before a primary treatment in a primary treatment facility of a muddy water shield method.

According to the present invention, the maximum amount of solids can be recovered before the primary treatment by controlling the primary pretreatment device and the like, thereby reducing the amount of treatment after the primary treatment and improving the muddy water treatment efficiency. Can be done.

According to a tenth aspect of the present invention, there is provided a method for measuring the amount of solids, comprising: a first flow rate measuring step of measuring a flow rate of a muddy water mixed with excavated earth and sand of a face; Step, a second flow rate measuring step for measuring the flow rate of the muddy water after the solid recovery, a measured amount of muddy water in the first flow rate measuring step, and a measured amount of muddy water in the second flow rate measuring step. Calculating the solid recovery amount from the difference.

According to the present invention, the amount of collected solid can be simply and accurately measured by calculating the difference between the amount of supplied mud before collecting the solid and the amount of discharged mud after collecting the solid.

Further, in the solid amount measuring method according to the present invention, a solid flow rate measuring step for measuring a flow rate of solid contained in the muddy water mixed with excavated earth and sand of the face, and a solid flow rate measuring step for measuring the flow rate of the muddy water. A flow measurement step, a solid recovery step of separating and collecting solids from the wastewater, a second flow measurement step of measuring the flow rate of the mud after the solid recovery, and a first flow measurement step. A solid recovery amount calculating step of calculating the separated and recovered amount of the solid based on a difference between the measured amount of muddy water and the measured amount of muddy water in the second flow rate measurement step; the measured solid flow rate; A solid dissolving amount calculating step of obtaining a solid dissolving amount based on a difference from the separated and recovered amount.

According to the present invention, the amount of solid dissolved in the muddy water while the muddy water flows from the solid flow rate measuring device to the solid collecting device can be measured. Thus, if the amount of the additive added to the muddy water is adjusted, the optimum excavation can be performed with a smaller amount of the additive.

A control method according to a twelfth aspect of the present invention provides a method for controlling a solid recovery apparatus based on at least one of the steps described in any one of the tenth and eleventh aspects and the measured solid recovery amount or the solid dissolution amount. Controlling).

According to the present invention, the amount of solid recovered can be changed immediately by controlling the solid recovery apparatus based on either the measured amount of solid recovered or the amount of solid dissolved.

The invention according to claim 13 is the first invention.
2. The method according to 2, further comprising a step of controlling an amount of chemical added to muddy water supplied to the face based on the measured solid recovery amount.

According to the present invention, appropriate muddy water excavation can be performed with a smaller amount of medicine by controlling the amount of medicine added based on the accurately measured solid recovery amount. Therefore, resource saving and cost reduction can be realized. In addition, as a chemical | medical agent, there exist a thickener which raises the viscosity of muddy water, a dispersing agent which lowers the viscosity of muddy water, a dissolution inhibitor which suppresses the dissolution of solids in muddy water, and the like.

The invention according to claim 14 is the first invention.
In any one of Items 2 and 13, the method includes a step of controlling an amount of a dissolution inhibitor added to muddy water sent from the face to the solid recovery device based on the measured amount of dissolved solid.

According to the present invention, when the dissolution rate of solids in muddy water is high, by adding a dissolution inhibitor to the muddy water,
The dissolution rate can be reduced and the solids recovery rate can be increased.

The invention according to claim 15 is the first invention.
In any one of 2 to 14, the method includes a step of controlling an excavator based on at least one of the measured solid recovery amount and the solid dissolution amount.

According to the present invention, the excavator can be controlled more accurately by controlling the excavator based on at least one of the accurately measured solid recovery amount and solid dissolution amount. This increases the amount of solids recovered,
The solid recovery rate can be improved.

The control of the excavator includes changing the jack speed, bit elongation, cutter rotation speed, bit angle, and the like.

[0042]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Preferred embodiments utilizing a muddy water treatment system according to the present invention will be described below in detail with reference to the drawings, taking a muddy water shield method as an example.

FIG. 1 shows an overall view of a muddy water shield method according to an embodiment of the present invention.

In the muddy water shield construction method, after excavating the shaft 32, muddy water is supplied to the chamber 42 inside the shield machine 34 to stabilize the face 46, while excavating the face 46 with the cutter disc 40 of the shield machine 34. Tunnel 3
6 is a construction method. The muddy water shield method includes a shield machine 34, a mud feed system 43, and a mud discharge system 47.
And the muddy water treatment equipment 30 and the face stability management system 58.

The muddy water sent from the muddy water treatment equipment 30 to the shield chamber 42 inside the shield machine 34 via the mud feed system 43 and used to stabilize the face 46 is mixed with the excavated earth and sand in the shield chamber 42 by stirring. It is sent back to the muddy water treatment facility 30 via the sludge discharging system 47. In the muddy water treatment equipment 30, earth and sand and the like are classified from the returned muddy water, necessary components are adjusted, and then sent out to the shield machine 34 again.

The mud feed system 43 includes a mud feed pipe 44 serving as a mud flow path from the mud treatment equipment 30 to the chamber 42.
And a sludge pump 96. Further, the sludge drainage system 47 is provided from the chamber 42 to the muddy water treatment equipment 30.
Pipe 48, which is a muddy water flow path up to, a mud pump 98 provided in the mud pipe 48 near the chamber 42, and a shaft 3
2 A relay pump 97 provided in the exhaust pipe 48 near the bottom.
And a solid flow meter 70 provided in the mud pipe 48 near the chamber 42.

The face stability management system 58 mainly includes the face 4
6 is provided in a tunnel 36 close to the shield machine 34. The face stability management system 58 includes a dispersant tank 50, a dissolution inhibitor tank 52, and a static mixer 54 provided in the mud feed pipe 44 and mixing and stirring the dispersant supplied from the dispersant tank 50 and the muddy water. It is comprised including. Further, the dissolution inhibitor supplied from the dissolution inhibitor tank 52 is added to the muddy water in the mud pipe 48 as necessary.

The muddy water treatment equipment 30 is a primary treatment equipment 26
, A secondary processing facility 28, and an adjustment tank 3.

The mud returned to the muddy water treatment equipment 30 from the sludge discharge system 47 is classified in the primary treatment equipment 26 into solids such as sand, gravel, clay, etc., in which the diameter of the soil particles contained in the muddy water is 74 μm or more. And sent to the adjustment tank 3. Adjustment tank 3
Then, the muddy water is sent to the mud feed system 43 after its properties are adjusted, and the muddy water that is not sent out is sent to the secondary treatment equipment 28 to classify the silt clay or the like having a size of less than 74 μm, and the muddy water after the classification is adjusted. It is sent back to the tank 3 and is classified cyclically.

The primary processing in the primary processing equipment 26 is divided into preprocessing and main processing. The pre-treatment is used for the purpose of reducing the burden of the main treatment, and particularly aims to separate and remove solids such as clay which are difficult to be separated by the main treatment from the muddy water.

More specifically, the primary pretreatment machine 20 is provided with the function of the pretreatment, and the liquid cyclone 17 and the vibrating sieve 4 are provided with the function of the main treatment. Further, a hopper 1 for storing separated clay and the like.
3 are provided.

From the sludge discharge system 47, the primary treatment equipment 26
Is fed into the primary pre-treatment machine 20, and after solids such as clay contained in the mud are collected, the slurry is fed into the vibrating sieve 4 and removed by pre-treatment by vibrating the wire mesh. Missing sand and gravel are classified.

The classified mud is supplied to the liquid cyclone 17, and the concentrated mud by centrifugal action due to the rotation of the water stream is again sent to the vibrating sieve 4 to be circulated and classified.
Primary pretreatment machine 20, vibrating sieve 4, and hydrocyclone 17
Mud from which soil and the like of 74 μm or more has been removed by the adjustment tank 3
Sent to On the other hand, the classified earth and sand of 74 μm or more is thrown into the hopper 13, temporarily stored, and then carried to the disposal site by the dump truck.

FIG. 2 is a schematic diagram of the primary pre-processing machine 20.

The primary pretreatment device 20 is provided with a mesh-shaped rotating drum 172 serving as a solid separation path, a motor 170 for rotating the rotating drum 172, and a muddy water that is provided below the rotating drum 172 and that is not collected. And a tank 176 for temporary storage.

The muddy water is supplied from the sludge discharging system 47 to the pipe 142.
Is sent to the primary pre-processing machine 20 via the. Rotating drum 17
Reference numeral 2 denotes a discharge port at one end and a solid discharge port at the other end. The supply port is located above the discharge port so that the waste water flows from the supply port to the discharge port by its own weight. Is provided at the position.

That is, of the muddy water supplied to the supply port, solids that did not leak from the mesh of the rotating drum 172 are discharged by its own weight from the discharge port, and muddy water leaked from the mesh of the rotating drum 172 is stored in the tank 176. Is stored in At this time, the separation performance can be adjusted by the motor 170.

The muddy water stored in the tank 176 of the primary pretreatment machine 20 is pumped toward the vibrating sieve 4 via a pipe 140 by a pump 90 provided near the bottom of the tank 176.

The pipe 142 is provided with a first flow meter 162 for measuring the flow rate of the muddy water sent to the primary pretreatment machine 20,
The pipe 140 is provided with a second flow meter 160 for measuring the flow rate of the mud after solid recovery in the primary pretreatment machine 20.
These flow meters 160 and 162 are commonly used, and can be measured inexpensively and easily.

As shown in FIG. 2, it is preferable that the flow meter 160 and the flow meter 162 are provided at a position as close as possible to the primary pretreatment machine 20. By providing a close position,
Since there is almost no time lag between solid recovery and muddy water measurement, the amount of solids can be measured accurately.

The solid recovery by the primary pretreatment machine 20 is adjusted by rotating the rotary drum 172 and supplying air and washing water near the muddy water supply port to the rotary drum 172. The reason for supplying these is that the muddy water supplied to the rotating drum 172 is likely to adhere to the mesh due to clay or the like. This is for collecting.

The supply of air is performed by the compressor 80 through a pipe 144, and the supply of cleaning water is performed through a pipe 146 by a pump 92 that pressurizes cleaning water sent from a cleaning water tank (not shown). Tubes 144, 146
It is supplied into the rotating drum 172 from each nozzle at the tip.

The flow of the mud is as described above.
Hereinafter, measurement and control of the solid recovery amount will be described.

FIG. 3 is a flowchart showing the flow of the measurement and control of the solid recovery amount.

First, the primary pretreatment machine 2 is operated by the flow meter 162.
The supply amount V1 of the muddy water to 0 is obtained (step 2).
Further, the flow rate V2 of the washing water is determined by the pump 92
The measurement is performed using a flow meter 164 provided in the washing water flow path between the cleaning water flow path 72 and the cleaning water flow path 72 (step 4). Flow meter 1 used here
64 may be the same as the flow meters 160 and 162.

The flow rate V3 of the muddy water sent from the primary pretreatment machine 20 is measured using the flow meter 160 (step 6).

The values of V1, V2,
The solid recovery amount V is obtained from V3. The calculation formula is V = V
1 + V2−V3, which is obtained by the arithmetic unit 180 shown in FIG. 2 (step 8).

In this way, the solid recovery amount V can be determined. As can be seen from this equation, even when washing water is added to the muddy water containing solids in order to enhance the solids collecting effect, the calculation considering the added amount of washing water can be performed, so that the solids collection amount can be accurately measured.

When the cleaning is not performed, the above equation may be calculated as V = V1-V3.

Further, based on the obtained solid recovery amount V,
It is important to perform a predetermined control in order to improve the face stability and the solid recovery rate.

As shown in FIG. 1 to FIG.
By comparing the calculated solid recovery amount with a desired value (step 10), if the solid recovery amount is smaller than the desired value,
It increases the jack speed of the shield machine 34 and the amount of the preceding bit that can expand and contract, reduces the rotational speed of the cutter 40, reduces the amount of dispersant supplied to the face, and controls the compressor 80 and the pump 92. , 1
The amount of air and the amount of cleaning water to be supplied to the next pretreatment device 20 are reduced (step 14).

It should be noted that there is no particular need to control the amount of solids recovered above the desired amount, but it is possible to control as needed.

As described above, by controlling the primary pretreatment machine 20 and the like, the maximum amount of solids can be recovered before the primary treatment, the amount of treatment after the primary treatment is reduced, and the muddy water treatment efficiency is improved. be able to.

Here, the extensible bit that can be extended and retracted is a bit for excavating the ground with a part of the cutter bit provided on the cutter 40 preceding another cutter bit.
It can be expanded and contracted, and is described in a specification application filed by a patent application filed by the present applicant earlier (Japanese Patent Application Laid-Open No. 8-310293).

By controlling the excavator based on the accurately measured solid recovery amount, the excavator can be more accurately controlled. Thereby, the solid recovery amount can be increased, and the solid recovery rate can be improved.

Further, by controlling the solid recovery device 20, the solid recovery amount can be changed immediately. Accordingly, the face 46 can be stabilized, and the solid recovery rate can be improved.

Further, by controlling the dispersant addition amount based on the accurately measured solid recovery amount, appropriate mud drilling can be performed with less chemical. Therefore, resource saving and cost reduction can be realized. In addition, you may add agents other than a dispersing agent, for example, a thickener.

FIG. 4 is an example of a flowchart showing the flow of measurement and control of the amount of dissolved solid. By measuring the solid content dissolved in the muddy water and decreasing the dissolution rate, the solid recovery rate can be further improved.

First, the solid dissolution amount of the mud in the drain pipe 48 is measured by the solid flow meter 70 (step 20). This measurement is based on the specifications (Japanese Unexamined Patent Publication Nos. 9-159595 and 9-1596) filed by the applicant of the present invention.
Preferably, the measurement is performed using a measuring device using radio waves described in 23).

This measuring device radiates radio waves to muddy water, receives radio waves propagating in muddy water, calculates the density of solids based on the reception level, and calculates the flow rate of solids from the density. For this reason, it is complicated and expensive, but can measure accurately.

This measuring device is used for the solid flow meter 70 shown in FIG. As shown in FIG. 1, the solid flow meter 70 is provided in a drain pipe 48 near the face 46. This makes it possible to more appropriately measure the amount of solid dissolved while passing through the exhaust pipe 48. Here, the solid amount measured by the solid flow meter 70 is defined as V4.

Next, the flow rate V1 of the muddy water is measured by the flow meter 162 (step 22), the flow rate V2 of the washing water is measured by the flow meter 164 (step 24), and the flow rate Measure V3 (Step 2)
6).

Next, the amount of solid dissolved V0 is calculated by the calculating device 180 (step 28). Here, V0 = V4
− (V1 + V2-V3).

Based on the calculation result, a predetermined control is performed by using the control device 182. If the solid dissolving amount V0 is larger than the desired dissolving amount (step 30), the solid is excessively dissolved in the sludge pipe. The amount of the dissolution inhibitor added from tank 52 to the wastewater is increased (step 32).

When the amount is less than the desired amount, no particular control is required, but it is possible to control as needed.

According to the above control system and method,
It is possible to measure the amount of solid dissolved in the mud while the mud flows from the solid flow meter 70 to the primary pretreatment machine 20. If the amount of the additive to be added to the muddy water is adjusted based on the measurement result, the optimum excavation can be performed with a smaller amount of the additive.

The control performed based on the calculation result of the solid recovery amount may be performed based on the calculation result of the solid dissolution amount.

As described above, the amount of solids contained in the drilling mud is measured simply and accurately, and based on the obtained solid amount, the amount of the primary pretreatment machine, the excavator, and the amount of the additive to be added to the mud is determined. Can be properly controlled.

The present embodiment is not limited to the above-described muddy water shield construction method. For example, it can be applied to various muddy water methods such as a reverse method and an underground continuous wall method.

In the above example, an example of measuring the amount of solids with the primary pretreatment machine was shown. However, if the primary pretreatment machine is replaced with a primary treatment facility or a muddy water treatment facility, these facilities can be used. Can be measured.

Note that the control object is merely an example, and other control, such as control of changing the bit angle, is also possible. Further, the arithmetic unit 180 and the control unit 182
Is provided near the primary pre-processing machine 20 in FIG. For example, it may be provided near the face stabilizing system 58 in the tunnel 36.

In the present embodiment, the control device 182
Are provided integrally, a solid recovery control device for controlling a solid recovery device such as the primary pretreatment machine 20, a drug addition control device for controlling the amount of a drug such as a thickener supplied to the face, A control device for each control, such as a dissolution inhibitor addition control device for controlling the amount of the dissolution inhibitor added to the muddy water sent to the solid recovery device such as the next pretreatment machine 20 and a drilling control device for controlling the excavator May be provided.

[0093]

[Brief description of the drawings]

FIG. 1 is an overall view of a muddy water shield method according to an example of an embodiment of the present invention.

FIG. 2 is a schematic diagram of a primary pretreatment machine.

FIG. 3 is an example of a flowchart showing a flow of measurement and control of a solid recovery amount.

FIG. 4 is an example of a flowchart showing a flow of measurement and control of a solid dissolution amount.

[Explanation of symbols]

 3 Adjustment tank 20 Primary pretreatment machine 70 Solid flow meter 90, 92 Pump 160-164 Flow meter 170 Motor 176 Tank 180 Computing device 182 Control device

Continuing on the front page (72) Inventor Yasuhiko Asai 1-7-1 Kyobashi, Chuo-ku, Tokyo Toda Construction Corporation (72) Inventor Ei Yoshida 1-7-1 Kyobashi, Chuo-ku, Tokyo Toda Ken Inside the company (72) Inventor Yoshiharu Shimizu 1-7-1, Kyobashi, Chuo-ku, Tokyo Toda Construction Corporation (72) Inventor Akio Uraya 3-39-1, Hazawa, Nerima-ku, Tokyo San-A Kogyo Co., Ltd. (72) Inventor Masaru Yasukochi 3-39-1, Hazawa, Nerima-ku, Tokyo Inside San-A Kogyo Co., Ltd.

Claims (15)

[Claims] 1. A muddy water treatment system provided in a flow path of muddy water containing a solid and a liquid and having a solids recovery device for separating and recovering the solids from the muddy water, wherein the muddy water treatment system is provided on the upstream side of the solids recovery device. A first flow measurement device that measures the flow rate of the mud in the flow path, a second flow measurement device that is provided downstream of the solid recovery device and that measures the flow rate of the mud in the downstream flow path, An arithmetic unit for measuring a collected amount of the solid separated and recovered from the mud, based on a difference between the muddy water flow obtained by the first flow measuring device and the muddy water flow obtained by the second flow measuring device; A solids content measurement system comprising: 2. The solid quantity measuring system according to claim 1, wherein the first flow rate measuring device and the second flow rate measuring device are provided near the solid recovery device. 3. The solid flow rate measuring device according to claim 1, wherein the solid flow rate measuring device is provided upstream of the first flow rate measuring device and measures a flow rate of the solid contained in the muddy water in an upstream flow path. The device has a device, wherein the arithmetic device is configured to measure a dissolved amount of the solid dissolved in the muddy water based on a difference between the solid flow rate measured by the solid flow measuring device and the solid recovered amount. A solids content measuring system. 4. The solid recovery device according to claim 1, wherein the solid recovery device is provided in the muddy water flow path, and separates the solid and the liquid, and a cleaning unit that cleans the separation path. And a cleaning liquid amount measuring means for measuring a supply amount of the cleaning liquid, wherein the arithmetic device comprises: a cleaning liquid obtained by the cleaning liquid amount measuring means on the muddy water flow rate obtained by the first flow rate measuring device. It is configured to calculate a recovery amount of the solid separated and recovered from the mud, based on a difference between a supply flow rate to which a supply amount is added and a mud flow rate obtained by the second flow rate measuring device. Solids measurement system. 5. A solid recovery system for controlling the solid recovery device based on at least one of the measured solid recovery amount and the solid dissolution amount according to claim 1. A control system, comprising: a control device. 6. The control system according to claim 5, further comprising a drug addition control device for controlling a drug addition amount to mud supplied to the face based on the measured solid recovery amount. 7. The dissolution inhibitor according to claim 5, wherein an amount of the dissolution inhibitor added to muddy water sent from the face to the solid recovery device is controlled based on the measured solid dissolution amount. A control system comprising a control device, wherein the dissolution inhibitor addition control device is configured to add a dissolution inhibitor when the amount of the solid dissolved is greater than a desired value. 8. The control system according to claim 5, further comprising an excavation control device that controls an excavator based on at least one of the measured solid recovery amount and the solid dissolution amount. 9. The solid recovery device according to claim 5, wherein the solid recovery device is a primary pretreatment device used before a primary treatment in a primary treatment facility of a muddy water shield method. And control system. 10. A first flow rate measuring step for measuring the flow rate of muddy water mixed with excavated earth and sand of a face, a solid collecting step for separating and collecting solids from the muddy water, and a flow rate of the muddy water after collecting the solids A second flow rate measuring step for measuring the amount of solid recovered from the difference between the measured amount of muddy water in the first flow rate measuring step and the measured amount of muddy water in the second flow rate measuring step A method for measuring the amount of solids, comprising: a calculating step. 11. A solid flow rate measuring step for measuring a flow rate of the solid contained in the muddy water mixed with the excavated earth and sand of the face, a first flow rate measuring step for measuring a flow rate of the muddy water, A solid recovery step of separating and recovering solids from the water, a second flow measurement step of measuring the flow rate of the mud after the solid recovery, a measured amount of mud in the first flow measurement step, and the second flow rate Based on the difference between the measured amount of muddy water in the measurement step, a solid recovery amount calculation step of determining the separated and recovered amount of the solid, and the measured solid flow rate, based on the difference between the determined separated and recovered amount, A solid dissolving amount calculating step for determining a dissolving amount. 12. The method according to claim 10, further comprising: controlling a solid recovery device based on at least one of the measured solid recovery amount and the solid dissolution amount. Characteristic control method. 13. The control method according to claim 12, further comprising a step of controlling an amount of a chemical added to muddy water supplied to the face based on the measured amount of the collected solid. 14. The method according to claim 12, wherein the amount of the dissolution inhibitor added to the muddy water sent from the face to the solid recovery device is controlled based on the measured amount of the dissolved solid. How to control. 15. The control method according to claim 12, further comprising the step of controlling an excavator based on at least one of the measured solid recovery amount and the solid dissolution amount.