Shield mud treatment system and treatment process thereof

Abstract

The invention relates to a novel shield mud treatment system and a treatment process thereof. Comprising a shield tunneling machine conveying belt, a vibrating screen, a water tank, a roller screen, a spiral sand washer, a dewatering screen, a large mud block and medium mud block stone and sand conveying belt, a first water tank, a cyclone, a second water tank, a mud-water separation tank, a filter press, a slag slurry pool, a first-stage sedimentation pool, a second-stage sedimentation pool, a third-stage sedimentation pool and a water purifier. A shield tunneling machine conveying belt is connected with a vibrating screen, a roller screen, a spiral sand washer, a dewatering screen, a cyclone and a conveying belt mud-water separation system and then connected with a water tank, a separation tank, a filter press, a slag slurry pool, a sedimentation pool filter press and a water purifier mud-water separation system. Foam overflow grooves are formed in the upper parts of the spiral sand washer and the water tank and are respectively connected with the slurry pool. Through improvement of the shield mud treatment process, the shield mud treatment efficiency and cost are effectively improved, the efficiency is higher, gravel is effectively separated from shield mud, the shield mud outward transportation cost is reduced, resources are saved, and environmental pollution is effectively prevented.

Description

Technical Field

[0001] The present invention relates to the technical field of shield mud treatment, and particularly relates to a new shield mud treatment system and its treatment process. Background Art

[0002] Shield mud treatment is a national problem. Since the shield mud in the loess tableland is almost all loess, it has high viscosity and poor particle size, making the treatment more difficult. At the initial stage of the Shaolingyuan project of China Railway 12th Bureau, the traditional method was to directly discharge the shield mud into the slag pond. After using defoaming agents to eliminate the foam, it was transported out by sewage suction trucks and concrete mixer trucks, or dried with quicklime and then transported out by muck trucks. These methods are costly and not environmentally friendly. Foam will appear during the shield mud treatment process, which will cause air binding of the centrifugal pump and loss of power, resulting in a further increase in treatment costs. Summary of the Invention

[0003] In order to solve the technical problems of high cost and complex process in the existing shield mud treatment, the present invention provides a new shield mud treatment system and its treatment process.

[0004] For this purpose, one aspect of the embodiments of the present invention provides a shield mud treatment process, including the following steps:

[0005] First step, directly install two layers of vibrating screens under the conveyor belt of the shield machine. Coarse screen the shield mud through the first layer of the vibrating screen, obtain large mud blocks, and then transport them to the mud stacking point through the conveyor belt and transport them out.

[0006] Second step, the remaining shield mud is screened through the second layer of the vibrating screen to obtain medium mud blocks and stones, and then flows into the rotary screen through cleaning. After cleaning and screening, medium mud blocks and stones are obtained, and are transported to the stacking point through the conveyor belt and transported out.

[0007] Third step, the mud under the vibrating screen is subjected to sediment and sand cleaning and separation through a spiral sand washer. The sand will be dehydrated through a dehydration screen to obtain sand.

[0008] Fourth step, the muddy water separated by the sand washer and the muddy water eluted by the dehydration screen are subjected to sand and water separation again through a hydrocyclone to obtain fine sand.

[0009] Fifth step, the separated muddy water is added with a flocculant for flocculation treatment and precipitation, and the precipitate is filtered by a filter press to obtain a mud cake.

[0010] Sixth step, the clear water obtained by filtering is recycled after purification.

[0011] Further, in the third step, 2 spiral sand washers are installed for thorough sediment and sand separation.

[0012] Further, an overflow trough is opened on the spiral sand washer. The foam in the slurry overflows into the slurry sump through the overflow trough, decomposes after contacting sunlight and air, and then an antifoaming agent is added to the slurry sump to defoam. The defoamed slurry water is pumped onto a vibrating screen to wash and recycle the shield mud.

[0013] Exemplarily, the shield mud treatment process includes the following steps.

[0014] In the first step, the shield mud enters the first layer of the vibrating screen through the conveyor belt of the shield machine for coarse screening, and the large mud blocks obtained are transported out.

[0015] In the second step, the remaining shield mud is screened by the second layer of the vibrating screen. The medium mud blocks and medium-sized stones screened out are washed through a water trough and enter a rotary screen for re-screening. The medium mud blocks and stones screened out are transported out.

[0016] In the third step, the slurry screened by the rotary screen is pumped into the spiral sand washer by a first slurry pump. The slurry screened by the vibrating screen flows to the spiral sand washer through the receiving hopper and water trough at the bottom of the screen. The spiral sand washer conducts sediment and sand washing and separation. The sand is dehydrated by a dehydration screen to obtain sand, and then is transported to a sand stacking point through a conveyor belt. The overflow trough at the upper part of the spiral sand washer discharges the foam generated during the sand washing process into the slurry sump.

[0017] In the fourth step, the muddy water separated by the sand washer and the muddy water eluted by the dehydration screen flow into a first water tank, and then are pumped into a hydrocyclone by a second slurry pump for sand-water separation again. The fine sand obtained flows into the dehydration screen in the fourth step for dehydration treatment, and the fine sand obtained is transported out. The overflow trough at the upper part of the first water tank discharges the generated foam into the slurry sump.

[0018] In the fifth step, the separated muddy water enters a second water tank, is pumped to a muddy water separation tank by a third slurry pump, and after adding a flocculant, flocculation treatment and precipitation are carried out. The precipitate is pressed into a filter press by a feeding pump for filtering to obtain filter cakes for external transportation. The overflow trough at the upper part of the second water tank discharges the generated foam into the slurry sump.

[0019] In the sixth step, the clear water separated by the separation tank and the clear water pressed out by the filter press flow into a sedimentation tank. After sedimentation, the clear water is recycled after purification or discharged externally after purification.

[0020] Another aspect of the present invention provides a shield mud treatment system, including a vibrating screen, water tank 1, water tank 2, rotary screen, first spiral sand washer, second spiral sand washer, dewatering screen, No. 1 water tank, hydrocyclone, No. 2 water tank, mud-water separation tank, filter press, primary sedimentation tank, secondary sedimentation tank, tertiary sedimentation tank, and water purifier; the output end of the shield machine conveyor belt is arranged above the vibrating screen. The vibrating screen is designed with two layers, including a first layer of the vibrating screen and a second layer of the vibrating screen. The discharge port of the first layer of the vibrating screen is connected to the large mud block conveyor belt through a receiving hopper. Below the falling port of the second layer of the vibrating screen is water tank 1. Water tank 1 is connected to the rotary screen. Below the discharge port of the rotary screen is the medium mud block and stone conveyor belt. A receiving hopper is installed below the rotary screen. The receiving hopper is connected to a water tank. Water tank 2 is connected to the first spiral sand washer, and the first spiral sand washer is connected to the second spiral sand washer. The second spiral sand washer is connected to the dewatering screen. The discharge port of the dewatering screen is connected to the sand conveyor belt. The overflow ports on the first spiral sand washer and the second spiral sand washer and the water receiving hopper below the dewatering screen are connected to the No. 1 water tank through pipelines; the No. 1 water tank is connected to the hydrocyclone through a second slurry pump and pipelines. The sand outlet of the hydrocyclone is connected to the dewatering screen. The water outlet on the dewatering screen is connected to the No. 2 water tank through pipelines; the No. 2 water tank is connected to the mud-water separation tank through a third slurry pump and pipelines. The mud-water separation tank is connected to the feed inlet of the filter press through a feeding pump and pipelines. The filter press is connected to a water tank and then to the primary sedimentation tank. The water outlet of the primary sedimentation tank is connected to the secondary sedimentation tank. The water outlet of the secondary sedimentation tank is connected to the tertiary sedimentation tank. The tertiary sedimentation tank is connected to the water purifier through a sewage pump 2; the primary sedimentation tank is connected to the vibrating screen through a sewage pump and pipelines. Foam overflow troughs are arranged above the first spiral sand washer, the second spiral sand washer, the No. 1 water tank, and the No. 2 water tank. Each overflow trough is connected to a slurry tank. The slurry tank is connected to the vibrating screen through a vertical pole pump and pipelines.

[0021] Further, the mud-water separation tank is connected to the primary sedimentation tank through an overflow pipeline.

[0022] Further, the tertiary sedimentation tank is connected to the water purifier through a sewage pump and pipelines.

[0023] Further, a sewage collection channel is also arranged in all shield mud treatment systems. The sewage collection channel connects the slurry tank with each device.

[0024] The beneficial effects of the present invention compared with the prior art are as follows: Through the improvement of the shield mud treatment process, the treatment efficiency and cost of shield mud are effectively improved, the efficiency is higher, sand and gravel are effectively separated from the shield mud, the transfer and external transportation costs of the shield mud are reduced, resources are saved, and environmental pollution is effectively prevented. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 It is a schematic structural diagram of the shield mud treatment system described in the present invention. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0026] The following will clearly and completely describe the technical solutions in the embodiments of the present application with reference to the accompanying drawings in the embodiments of the present application. Obviously, the described embodiments are some, but not all, of the embodiments of the present application. All other embodiments obtained by those of ordinary skill in the art based on the embodiments in the present application without creative efforts shall fall within the protection scope of the present application.

[0027] In the description of the embodiments of the present application, the terms "first", "second", etc. in the specification and claims of the present application are used to distinguish different objects, rather than to describe a specific order of the objects. For example, the first guide wheel and the second guide wheel are used to distinguish different dielectric layers, rather than to describe a specific order of the dielectric layers.

[0028] In the description of the embodiments of the present application, unless otherwise specified, the meaning of "a plurality of" refers to two or more. For example, a plurality of elements refers to two elements or more than two elements.

[0029] In the embodiments of the present application, words such as "exemplary" or "for example" are used to indicate examples, illustrations or explanations. Any embodiment or design solution described as "exemplary" or "for example" in the embodiments of the present application should not be construed as being more preferred or having more advantages than other embodiments or design solutions. Rather, the use of words such as "exemplary" or "for example" is intended to present relevant concepts in a specific manner.

[0030] Embodiment 1, the described shield mud treatment process is characterized in that it includes the following steps: First step, directly install two layers of vibrating screens under the conveyor belt of the shield machine. The shield mud is roughly screened through the first layer of the vibrating screen to obtain large mud blocks and stones, which are then transported to the mud stacking point by the conveyor belt and transported out. Second step, the remaining shield mud is screened through the second layer of the vibrating screen to obtain medium mud blocks, which then flow into the rotary screen through the water tank for cleaning and screening. After cleaning and screening, medium mud blocks and stones are obtained and transported to the stacking point by the conveyor belt and transported out. Third step, the slurry under the rotary screen and the vibrating screen is subjected to sediment and sand cleaning and separation by a screw sand washer. The sand will be dehydrated by a dehydration screen to obtain sand. Fourth step, the muddy water separated by the sand washer and the muddy water eluted by the dehydration screen are subjected to sand-water separation again by a hydrocyclone to obtain fine sand. Fifth step, the separated muddy water is added with a flocculant for flocculation treatment and precipitation, and the precipitate is pressed by a filter press to obtain a mud cake. Sixth step, the clarified water obtained by pressing is purified and recycled.

[0031] Exemplarily, in the third step, two screw sand washers are installed for thorough sediment and sand separation.

[0032] Preferably, an overflow tank is opened on the screw sand washer. The foam in the slurry overflows into the slurry pool through the overflow tank and decomposes after contacting sunlight and air. Then, an antifoaming agent is added to the slurry pool to defoam. The defoamed slurry water is pumped onto the vibrating screen to clean and recycle the shield mud.

[0033] In an embodiment of the present invention, the shield mud treatment process includes the following steps. First step, the shield mud enters the first layer of the vibrating screen through the conveyor belt of the shield machine for coarse screening, and the large mud blocks and large stones obtained are transported out. Second step, the remaining shield mud is screened by the second layer of the vibrating screen. The medium mud blocks and medium stones screened out are washed in a water tank and then enter a rotary screen for re-screening. The medium mud blocks and stones screened out are transported out. Third step, the slurry screened out by the rotary screen is pumped into a spiral sand washer by a first slurry pump. The slurry screened out by the vibrating screen flows to the spiral sand washer through the receiving hopper at the bottom of the screen and the water tank for sediment and sand cleaning and separation. The sand is dehydrated by a dehydration screen to obtain sand, which is then transported to a sand storage point through a conveyor belt. The overflow trough at the upper part of the spiral sand washer discharges the foam generated during the sand washing process. Fourth step, the muddy water separated by the sand washer and the muddy water eluted by the dehydration screen flow into a first water tank, and then are pumped into a hydrocyclone by a second slurry pump for sand and water separation again. The fine sand obtained flows into the dehydration screen in the fourth step for dehydration treatment, and the fine sand is transported out. The overflow trough at the upper part of the first water tank discharges the foam generated. Sixth step, the separated muddy water enters a second water tank, is pumped into a muddy water separation tank by a third slurry pump, and after adding a flocculant, flocculation treatment and precipitation are carried out. The precipitate is pressed into a filter press by a feeding pump for filtering to obtain mud cakes for external transportation. The overflow trough at the upper part of the second water tank discharges the foam generated.

[0034] Another aspect of the present invention provides a shield mud treatment system, which includes a shield machine conveyor belt, a vibrating screen, a water tank, a rotary screen, a first spiral sand washer, a second spiral sand washer, a dewatering screen, a first water tank, a hydrocyclone, a second water tank, a mud separation tank, a filter press, a slurry pond, a primary sedimentation tank, a secondary sedimentation tank, a tertiary sedimentation tank, and a water purifier; the output end of the shield machine conveyor belt is arranged above the vibrating screen. The vibrating screen is designed with two layers, including a first layer of the vibrating screen and a second layer of the vibrating screen. The discharge port of the first layer of the vibrating screen is connected to a large mud block conveyor belt through a receiving hopper. Below the discharge port of the second layer of the vibrating screen is a water tank, and the water tank is connected to the rotary screen. Below the discharge port of the rotary screen is a medium mud block and stone conveyor belt. The muddy water washed out from the rotary screen is connected to the first spiral sand washer through a first slurry pump and a pipeline. A receiving hopper is installed below the vibrating screen, and the receiving hopper is connected to the water tank. The water tank is connected to the first spiral sand washer, the first spiral sand washer is connected to the second spiral sand washer, the second spiral sand washer is connected to the dewatering screen, and the discharge port of the dewatering screen is connected to a sand conveyor belt. The overflow ports on the first spiral sand washer and the second spiral sand washer and the water receiving hopper below the dewatering screen are connected to the first water tank through pipelines; the first water tank is connected to the hydrocyclone through a second slurry pump and a pipeline, the sand outlet of the hydrocyclone is connected to the dewatering screen, and the water outlet on the dewatering screen is connected to the second water tank through a pipeline; the second water tank is connected to the mud separation tank through a third slurry pump and a pipeline, the mud separation tank is connected to the feed inlet of the filter press through a feed pump and a pipeline, the filter press is connected to a water tank and then to the primary sedimentation tank, the water outlet of the primary sedimentation tank is connected to the secondary sedimentation tank, the water outlet of the secondary sedimentation tank is connected to the tertiary sedimentation tank, and the tertiary sedimentation tank is connected to the water purifier through a sewage pump; the primary sedimentation tank is connected to the vibrating screen through a sewage pump and a pipeline. Foam overflow troughs are arranged above the first spiral sand washer, the second spiral sand washer, the first water tank and the second water tank, and each overflow trough is connected to the slurry pond respectively. The slurry pond is connected to the vibrating screen through a vertical pole pump and a pipeline.

[0035] Exemplarily, the mud separation tank is connected to the primary sedimentation tank through an overflow pipeline.

[0036] Exemplarily, the tertiary sedimentation tank is connected to the water purifier through a sewage pump and a pipeline.

[0037] Exemplarily, all shield mud treatment systems are also provided with a sewage collection channel, which is arranged on the ground at the bottom of each device, so as to connect the slurry pond with each device and collect and recycle the muddy water overflowed and spilled from each device.

[0038] Exemplarily, the shield mud treatment system further includes a slurry pond, and the slurry pond is connected to the overflow troughs above the spiral sand washer, the first water tank and the second water tank through pipelines. Through the arrangement of the overflow troughs, the foam in the process of shield mud treatment can be effectively removed, so that the treatment efficiency is higher. Sand and gravel are effectively separated from the shield mud, reducing the cost of transporting the shield mud out, saving resources and effectively preventing environmental pollution.

[0039] In another embodiment of the present invention, in the shield mud treatment process, two layers of vibrating screens are directly installed under the hopper of the conveyor belt of the shield machine. The first layer of the vibrating screen screens out large mud blocks and transports them to the mud stacking point by the conveyor belt. The second layer of the vibrating screen screens out medium mud blocks, which flow into the rotary screen after being washed in the water tank. After cleaning and screening, the medium mud blocks or small stones are transported to the stacking point by the conveyor belt. The screened slurry is pumped to the spiral sand washer by the slurry pump. The small pieces containing gravel flow to the spiral sand washer through the receiving hopper and water tank under the screen for sediment and sand separation and cleaning (if two spiral sand washers are not enough, more can be added). The washed sand enters the dewatering screen and is transported to the sand stacking point by the conveyor belt after dehydration. The muddy water separated by the spiral sand washer and the muddy water under the dewatering screen flow into the first tank and are pumped into the cyclone by the slurry pump for sand and water separation. The separated fine sand flows into the same dewatering screen for dehydration, and the separated muddy water flows into the second water tank and is pumped to the chemical mixing tank of the mud separation tank by the slurry pump, where it is mixed with the chemical and flows into the tank. The mud sinks to the bottom of the tank and is pressed into the filter press by the feeding pump, and the pressed mud cake is directly transported out. The clear water separated by the separation tank and the clear water pressed out by the filter press flow into the first sedimentation tank. Part of the clear water is pumped into the machines in the tank for recycling, part enters the second sedimentation tank, is pumped into the water purification machine, and is discharged after purification. The impurities enter the tank and are pumped into the mud separation tank (the number of mud separation tanks is determined according to production needs). An overflow trough is opened on the spiral sand washer, and overflow troughs are opened on the first and second water tanks after they are heightened. The overflowing foam flows into the pulp tank through the overflow troughs, decomposes after contacting sunlight and air, and defoaming agent is added for defoaming. During the working interval of the shield machine, the defoamed mud is pumped to the vibrating screen by the customized vertical pole pump and enters the same process as the shield mud.

[0040] Since the implementation of the present invention, the propulsion volume of the shield machine has been increased, the working efficiency has been improved, the recycling rate of water and sand has been increased, the external transportation cost of shield mud has been reduced, the dosage of defoaming agent has been reduced, more than 200,000 yuan of expenses have been saved for the project every month, resources have been saved, and environmental pollution has been prevented.

Claims

1. A shield mud treatment process, characterized in that: The following steps are included: In the first step, two layers of vibrating screens are directly installed under the conveyor belt of the shield machine. The shield mud is coarsely screened through the first layer of vibrating screens, and the large mud blocks are transported to the mud pile point through the conveyor belt for external transportation; In the second step, the remaining shield mud is screened through the second layer of vibrating screen to obtain medium mud blocks and stones, and then flows into the roller screen after cleaning. After cleaning and screening, medium mud blocks and stones are obtained, which are transported to the stacking point by the conveyor belt and then shipped out; In the third step, the mud under the vibrating screen is cleaned and separated by a spiral sand washer, and the sand is dehydrated by a dewatering screen to obtain sand; In the fourth step, the muddy water separated by the sand washing machine and the muddy water washed by the dewatering screen are separated again by a cyclone to obtain fine sand; The fifth step is to add flocculants to the separated mud water for flocculation and precipitation, and filter the precipitate through a filter press to obtain a mud cake; The sixth step is to purify the supernatant water obtained from the filtration and then recycle it.

2. The shield mud treatment process according to claim 1, characterized in that: In the third step, two spiral sand washing machines are installed to completely separate the mud and sand.

3. The shield mud treatment process according to claim 2, characterized in that: An overflow tank is opened on the spiral sand washing machine. The foam generated by the foaming agent in the mud overflows into the slurry pool through the overflow tank and is decomposed by exposure to sunlight and air. Then a defoaming agent is added to the slurry pool for defoaming. The defoamed mud water is pumped onto the vibrating screen and then recycled for cleaning the shield mud.

4. The shield mud treatment process according to claim 1, characterized in that: The following steps are included: In the first step, the shield mud passes through the shield machine conveyor belt into the vibrating screen layer for coarse screening, and large mud blocks and large stones are obtained for external transportation; In the second step, the remaining shield mud is screened through the second layer of vibrating screen. The medium mud blocks and medium stones screened out are washed in the water tank and then screened again on the roller screen. The medium mud blocks and stones are screened out for transportation. In the third step, the mud under the roller screen is pumped into the spiral sand washing machine through the first slurry pump, and the mud under the vibrating screen flows to the spiral sand washing machine through the receiving hopper and water tank at the bottom of the screen for mud and sand cleaning and separation. The sand is dehydrated by the dewatering screen to obtain sand, and then transported to the sand pile point through the conveyor belt; the foam generated during the mud sand washing process in the overflow tank on the top of the spiral sand washing machine is discharged into the slurry pool; In the fourth step, the muddy water separated by the sand washing machine and the muddy water washed by the dewatering screen flow into the No. 1 water tank, and then pumped into the cyclone through the second slurry pump for sand and water separation again. The obtained fine sand flows into the dewatering screen in the fourth step for dehydration treatment, and the obtained fine sand is transported out; the overflow tank on the top of the No. 1 water tank discharges the generated foam into the slurry pool; In the fifth step, the separated muddy water enters the No. 2 water tank, and is pumped to the mud-water separation tank by the third slurry pump. After adding flocculants, flocculation treatment and precipitation are carried out, and the precipitate is pressed into the filter press by the feed pump to obtain the mud cake for external transportation; the overflow tank on the top of the No. 2 water tank discharges the generated foam into the slurry pool; In the sixth step, the clean water separated by the separation tank and the clean water pressed by the filter press flow into the sedimentation tank. After sedimentation, the clean water is purified and then recycled or discharged.

5. A shield mud processing system, characterized in that: It includes a shield machine conveyor belt, a vibrating screen, a water trough 1, a water trough 2, a roller screen, a first spiral sand washing machine, a second spiral sand washing machine, a dewatering screen, a No. 1 water tank, a cyclone, a No. 2 water tank, a mud-water separation tank, a filter press, a primary sedimentation tank, a secondary sedimentation tank, a tertiary sedimentation tank and a water purifier; the output end of the shield machine conveyor belt is arranged on the upper part of the vibrating screen, the vibrating screen is a two-layer design, including a first layer of vibrating screen and a second layer of vibrating screen, a receiving hopper is arranged under the vibrating screen, the roller screen includes a drum and a roller screen receiving hopper, the discharge port of the first layer of the vibrating screen is connected to the large mud block conveyor belt, the vibrating screen receiving hopper is connected to the water trough 2, the water trough 2 is connected to the first spiral sand washing machine, the water trough 1 is below the discharge port of the second layer of the vibrating screen, the water trough 1 is connected to the roller screen, the medium mud block and gravel conveyor belt is below the discharge port of the roller, the roller screen receiving hopper is connected to the first spiral sand washing machine through the first slurry pump, the first spiral sand washing machine is connected to the second spiral sand washing machine, the second spiral sand washing machine is connected to the dewatering screen Then, the discharge port of the dewatering screen is connected to the sand conveyor belt, the overflow port of the second spiral sand washing machine and the water receiving bucket under the dewatering screen are connected to the No. 1 water tank through a pipeline; the No. 1 water tank is connected to the cyclone through the second slurry pump and a pipeline, the sand outlet of the cyclone is connected to the dewatering screen, and the outlet is connected to the No. 2 water tank through a pipeline; the No. 2 water tank is connected to the mud and water separation tank through the third slurry pump and a pipeline, the mud and water separation tank is connected to the feed port of the filter press through a feed pump and a pipeline, the filter press water trough is connected to the primary sedimentation tank, the outlet of the primary sedimentation tank is connected to the secondary sedimentation tank, the outlet of the secondary sedimentation tank is connected to the tertiary sedimentation tank, and the tertiary sedimentation tank is connected to the water purifier through a sewage pump; the primary sedimentation tank is connected to the first layer of the vibrating screen through a sewage pump 1 and a pipeline, and foam overflow troughs are arranged on the top of the No. 1 spiral sand washing machine and the No. 2 spiral sand washing machine, the No. 1 water tank and the No. 2 water tank, and each overflow trough is connected to the slurry tank respectively, and the slurry tank is connected to the first layer of the vibrating screen through a vertical rod pump and a pipeline.

6. The shield mud processing system according to claim 5, characterized in that: The mud-water separation tank is connected to the primary sedimentation tank through an overflow pipe.

7. The shield mud processing system according to claim 5, characterized in that: The tertiary sedimentation tank is connected to the water purifier through a pipe.

8. The shield mud processing system according to claim 5, characterized in that: All shield mud treatment systems are also provided with sewage collection channels, which connect the slurry pool with various equipment.

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