WO2018210159A1

WO2018210159A1 - Method and system for environmentally friendly dredging of large reservoir and lake

Info

Publication number: WO2018210159A1
Application number: PCT/CN2018/085989
Authority: WO
Inventors: 张大伟
Original assignee: 密西西比国际水务有限公司; 亚马逊水务有限公司; 张大伟
Priority date: 2017-05-16
Filing date: 2018-05-08
Publication date: 2018-11-22
Also published as: CN106930349A

Abstract

Disclosed are a method and system for environmentally friendly dredging of a large reservoir and a lake. The method for environmentally friendly dredging comprises: on a water surface of a lake or a reservoir where sludge cleaning is implemented, using a module floating box (31), a drive floating box (3), a domestic water floating box (5), a sewage floating box (22), etc. to assemble a floating platform (1); arranging equipment, such as a sludge pumping device (8), a sand waste separating device (12), a dehydrating device (9), a drying device (15), a dry distillation device (16), a sewage purification device (17), a diesel generator (2), a diesel storage tank (21), a steam boiler (19), a fuel depot (20), an anchor windlass and an anchor (23) and living facilities on the floating platform (1); and carrying out pretreatment on sludge pumped by the sludge pumping device (8) and then carrying out dry distillation, thus implementing sludge cleaning on the water surface on the spot, land is not occupied, the water body is not disturbed, no sludge is transported outward, no secondary pollution of the water body and the environment is caused, and resource recovery, rendering harmless, stabilization and reduction of sludge treatment are realised.

Description

Method and system for environmental dredging of large reservoirs and lakes

Technical field

The disclosure belongs to the technical field of environmental protection, and relates to silt cleaning of lake reservoirs, and specifically relates to a method for environmental dredging of large reservoirs and lakes.

The present disclosure also relates to a system for implementing the above method.

Background technique

Human activities around lakes and reservoirs, soil surface erosion caused by agricultural activities, and forest destruction caused by population increase have caused rivers to carry large amounts of sediment and garbage into lakes and reservoirs.

Many lakes and reservoirs are used to raise fish. Each year, a large amount of bait is put into the lake reservoir. After feeding, the fish can only eat 40%, and the rest sink into the lake and reservoir bottom.

According to statistics in 2015, there are more than 2,500 lakes in Zhejiang Province that are not dredged, with a total sedimentation capacity of 110 million m3 and an average siltation depth of about 0.8 m. The sediment volume of Taihu Lake in Jiangsu is about 1.857 billion m3, and the mud area accounts for 47.5% of the total lake surface area. The total amount of mud in the Dianchi Lake in Kunming is estimated to be around 80 million to 120 million m3.

On the one hand, a large number of lakes and reservoirs in the country are heavily silted, and on the other hand, governments everywhere are facing the problem of silt cleaning. The biggest problems in silt cleaning are: (1) Around lakes and reservoirs, especially around large lakes and reservoirs, it is difficult to find large areas of flat land to install silt cleaning facilities; (2) lakes and reservoirs, especially large lakes and reservoirs, are cleaned up. The hundreds of thousands of millions of water-containing sludge containing a large amount of pollutants cannot be disposed of. Take the Panjiakou Reservoir in Hebei Province as an example. The length of the reservoir is more than 50 kilometers and the area is 76 square kilometers. Both sides are mountains and mountains. The dredging facilities cannot be placed. The cleaned mud, fish manure and garbage can not be disposed of.

Traditional lake reservoir silt cleaning technology often uses dry soil excavation, hydraulic flushing, grab dredging, cutter suction dredging, bucket wheel dredging, etc. In the application process, the construction environment is poor and easy. The surface layer of floating mud will cause the pollutants in the sediment to spread after being stirred, and there will also be a serious back-sludge phenomenon. Strongly disturbing the sediment, it is often impossible to achieve the purpose in the dredging project with the goal of improving water quality.

Whether it can occupy the land around the lake and the reservoir, and complete the cleanup of the lake, reservoir silt and pollutants. After careful search, there is no such technology to report at present. This is also an urgent need of researchers in the industry. Conquer the puzzle.

Summary of the invention

The main object of the present disclosure is to provide a method and system for environmental dredging of large reservoirs and lakes to solve at least one of the above technical problems.

In order to achieve the above object, as an aspect of the present disclosure, a method for environmentally dredging of a large reservoir and a lake is provided, including the following steps:

Step 1. Place the floating platform in the work area and fix it;

Step 2: using the suction sludge device on the floating platform to extract the sludge at the bottom of the working area, and transport it to the pretreatment equipment on the floating platform for pretreatment to obtain the separated and dehydrated and dried sludge and organic waste;

Step 3: dry distillation and organic waste after separation, dehydration and drying are subjected to dry distillation treatment by using a retorting device on a floating platform to prepare biochar;

In step 4, the produced biochar is transported back to the bottom and/or used for soil improvement.

As another aspect of the present disclosure, a large reservoir and lake environmental dredging system is also provided, including:

The floating platform is assembled by at least a module pontoon and a driving pontoon;

a suction sludge device, a pretreatment device and a carbonization device disposed on the floating platform; wherein the suction sludge device is used for extracting sludge from the bottom of the water; and the pretreatment device is used for pretreating the extracted sludge to obtain Separation, pulverization, dehydration, drying treatment of sludge and organic waste; a retorting device is used for dry distillation of organic sludge and organic waste after separation, pulverization, dehydration and drying to form biochar.

Based on the above technical solutions, the method and system for cleaning sludge of the present disclosure have the following beneficial effects as compared with the prior art: the sludge is cleaned on the surface of the water surface, does not occupy the land, does not disturb the water body, does not have sludge transported, does not cause water body and The secondary pollution of the environment does not interfere with the normal life of the surrounding residents, and realizes the resource utilization, harmlessness, stabilization and reduction of sludge treatment.

DRAWINGS

The above and other objects, features and advantages of the present invention will become more apparent from the claims. The same reference numerals are used throughout the drawings to refer to the same parts. The drawings are not intended to be scaled to scale in actual size, with emphasis on the gist of the present disclosure.

1 is a schematic flow chart of an environmentally-friendly dredging method for a large reservoir and a lake according to the present disclosure;

2A is a schematic plan view of a container dormitory of the present disclosure;

2B is a front elevational view of the container dormitory of the present disclosure;

Figure 3 is a plan view of the container control room of the present disclosure;

Figure 4 is a plan view of the container restaurant of the present disclosure;

Figure 5 is a plan view of the container office of the present disclosure;

Figure 6 is a plan view of the container kitchen of the present disclosure;

7A is a schematic plan view of the module pontoon of the present disclosure;

7B is a side view of the modular pontoon of the present disclosure;

7C is a schematic side view of the module pontoon of the present disclosure;

7D is a schematic view showing the assembly of the mountain bolt, the connecting plate and the connecting beam of the present disclosure;

Figure 8A is a schematic plan view of the drive pontoon of the present disclosure;

8B is a schematic side view of the driving pontoon of the present disclosure;

8C is a schematic side view of the driving pontoon of the present disclosure;

9A is a schematic plan view of the sewage effluent tank of the present disclosure;

9B is a schematic elevational view of the sewage effluent tank of the present disclosure;

9C is a schematic side view of the sewage effluent tank of the present disclosure;

Figure 10A is a schematic plan view of the domestic water pontoon of the present disclosure;

Figure 10B is a schematic elevational view of the domestic water pontoon of the present disclosure;

Figure 10C is a schematic side view of the domestic water pontoon of the present disclosure;

Figure 11 is a plan view showing the surface working platform of the mud pump of the present disclosure;

12 is a schematic diagram of a device layout on a floating platform of the present disclosure;

Figure 13 is a layout view of all equipment of the large-scale reservoir and lake environmental dredging system of the present disclosure.

The meanings of the reference numerals in the figure are as follows:

1- Large floating platform, 2-diesel generator, 3-drive pontoon, 4-loading sand barge, 5- domestic water pontoon, 6-suction sludge device, 7-air compressor, 8-drain pump work Platform, 9-dewatering device, 10-biomass material barge, 11-sealed cabin, 12-sand waste separation device, 13-crushing equipment, 14-reservoir lake water body, 15-drying device, 16-dry distillation device, 17- Sewage purification unit, 18-steam generator, 19-steam boiler, 20-fuel warehouse, 21-diesel storage tank, 22-sewage pontoon, 23-winding machine, 24-biochard barge, 25-container kitchen, 26 - Container office, 27-container restaurant, 28-container control room, 29-container dormitory, 30-control cabinet, 31-module pontoon, 32-propeller, 33-drive, 34-mountain bolt, 35-connector , 36-wash basin, 37-washing machine, 38-shower, 39-toilet, 40-wash basin, 41-high bed, 42-small table and chair, 43-closet, 44-dining chair, 45-burner, 46 - Disinfection cabinet, 47-air conditioner, 48-refrigerator, 49-steaming oven, 50-sink, 51-water heater, 52-workbench, 53-office chair, 54-sewage tank, 55-conveying pipe, 56 - Domestic water tank, 57-water supply pump, 58-sludge, 59-sludge mud, 60-dry sludge, 61-organic waste, 62-sand, 63-biochar, 64-sewage, 65-connected column, 66- Connection port, 67-connecting beam, 68-row fan, 69-exhaust vent.

detailed description

The technical solutions in the embodiments of the present disclosure will be clearly and completely described below in conjunction with the drawings in the embodiments of the present disclosure. It is apparent that the described embodiments are only a part of the embodiments of the present disclosure, and not all of them. All other embodiments obtained by a person of ordinary skill in the art based on the embodiments of the present disclosure without departing from the inventive scope are the scope of the disclosure.

The large reservoirs in the present disclosure are not limited to reservoirs with a storage capacity of more than 100 million cubic meters, that is, conventional standard large (1) type reservoirs and large (2) type reservoirs, for example, reservoirs having a storage capacity of ≥0.5 billion cubic meters, The large lakes include, but are not limited to, lakes with a lake area of more than 500 square kilometers. For example, lakes with a lake area of more than 50 square kilometers. The large-scale reservoir and lake environmental dredging system and method of the present disclosure are suitable for installing large floating platforms. Dredging operation of the water body.

The present disclosure discloses a method for environmentally dredging large reservoirs and lakes, including the following steps:

Step 1. Place the floating platform in the work area and fix it;

Step 2: using the suction sludge device on the floating platform to extract the sludge from the bottom of the working area, and transport it to the pretreatment equipment on the floating platform for pretreatment to obtain the separated and dehydrated and dried sludge and organic waste;

The floating platform is formed by assembling a modular pontoon, a driving pontoon, a sewage pontoon and a domestic water floating tank; wherein the sewage water tank is used for collecting sewage and domestic sewage generated during the operation, and the domestic water tank is used for storing domestic water. .

Wherein, the module pontoon, the driving pontoon, the sewage pontoon and the domestic water pontoon are assembled by using mountain bolts, connecting plates and connecting beams;

The floating platform is further provided with a power supply device, which includes a diesel generator and/or a steam generator for supplying power to various facilities and equipment on the floating platform;

The floating platform is also provided with living facilities including container dormitories, container kitchens, container restaurants, container lounges and/or container offices.

Wherein, the pretreatment device in step 2 comprises a sand and gravel garbage separation device, a crushing device, a dewatering device/drying device;

Among them, the gravel garbage separation device is used for separating the sludge from the gravel garbage, and the separated organic garbage is sent to the crushing device for crushing; the crushed organic garbage is transported to the dehydration/drying device for dehydration and drying treatment.

Among them, the sand and gravel separated by the gravel garbage separation device is discharged back to the bottom and/or transported back to the shore to form building materials.

Among them, when the dehydration/drying device performs dehydration and drying treatment, the moisture content of the sludge is reduced from ≥95% to ≤40%.

The disclosure also discloses a large-scale reservoir and lake environmental dredging system, including:

Wherein, the floating platform further comprises a sewage pontoon and a domestic water pontoon, wherein the sewage pontoon and the domestic water pontoon are combined with the modular pontoon and the driving pontoon by using mountain bolts, connecting plates and connecting beams. Among them, the sewage pontoon is used to collect the sewage and domestic sewage discharged from the pretreatment device, and the domestic water pontoon is used for storing domestic water;

The large-scale reservoir and lake environmental dredging system further includes a sewage purification device, and the sewage purification device is used for purifying sewage stored in the sewage water tank, and then discharging after reaching the standard.

The system for environmental dredging of the large reservoir and the lake further includes a power supply device including a diesel generator and/or a steam generator for supplying power to various facilities and equipment on the floating platform.

The system for environmental sanitation of large reservoirs and lakes further includes living facilities, including container dormitories, container kitchens, container restaurants, container lounges, and/or container offices.

In one embodiment, the present disclosure discloses a large floating platform assembled directly on the water surface of a lake or a reservoir, and installs a sludge removal device, a sand and gravel garbage separation device, a dewatering device, a drying device, and a large floating platform. The liquid distillation device, the crushing equipment, the power generation equipment, the driving equipment, the living facilities, etc., directly perform the method of sludge cleaning on the water surface of the lake and reservoir, and the specific steps are as follows:

(1) Using a barge and driving the pontoon to move the large floating platform to the working area;

(2) Using a driving pontoon to adjust the position of the large floating platform in the working area, and fixing the position of the large floating platform with the anchoring machine and the anchor;

(3) Using the suction sludge device installed on the working platform of the mud pump to extract the sludge from the bottom of the water, and transport the sludge through the conveying pipe to the sand and gravel garbage separation device installed on the large floating platform;

(4) Separating the sludge from the gravel garbage by using a sand and gravel garbage separation device, and transporting the separated organic waste to a crushing device installed on a large floating platform for crushing;

(5) conveying the crushed organic waste to a dewatering device and a drying device installed on a large floating platform for dehydration and drying;

(6) discharging the separated sand and gravel back to the bottom of the water or/and returning it to the shore by barge to make building materials for sale;

(7) The sludge separated from the gravel garbage is dehydrated and dried by using a dewatering device and a drying device installed on a large floating platform, and the moisture content of the sludge is reduced from ≥95% to ≤40%;

(8) Drying and drying the dried sludge and organic waste after dehydration and drying by using a retorting device installed on a large floating platform to form biochar;

(9) transporting the produced biochar to the bottom water purification water body and absorbing organic pollutants released from the eutrophic compounds remaining in the water bottom soil to the water body, and/or being transported back to the shore by barges for soil improvement;

(10) The sewage discharged from the dewatering device and the domestic sewage discharged from the living facilities are purified by the sewage purification device installed on the large floating platform, and then discharged into the water body;

(11) The use of diesel generators and steam generators mounted on large floating platforms to supply power to various facilities and equipment on large floating platforms.

The above method implements silt cleaning on the surface of the water surface, does not occupy the land, does not disturb the water body, does not transport the sludge, does not cause secondary pollution of the water body and the environment, does not interfere with the normal life of the surrounding residents, and realizes the resource and harmless treatment of the sludge treatment. Stabilization and reduction.

In yet another embodiment, the method of the present disclosure includes the following steps:

(1) In the water surface of the lake and reservoir where silt cleaning is carried out, the modular pontoon, the driven pontoon, the domestic water pontoon and the sewage pontoon are assembled into a large floating platform, and the gravel garbage separation device and dehydration are arranged on the large floating platform. Installation, drying device, retorting device, sewage purification device, diesel generator, diesel storage tank, steam boiler, fuel storage, windlass, living facilities, etc.;

(2) Move the large floating platform to the working area with the transport sand barge and the drive pontoon;

(3) Adjust the position of the large floating platform in the working area with the driving pontoon, and fix the position of the large floating platform with the anchoring machine and the anchor;

(4) extracting the sludge from the bottom of the water with a suction sludge device installed on the surface working platform, and transporting the water to the gravel garbage separation device installed on the large floating platform through the conveying pipe;

(5) Separating the sludge from the gravel garbage with a sand and gravel garbage separation device, and transporting the separated organic waste to a crushing device installed on a large floating platform for crushing. The crushed organic waste is transported to a dewatering device and a drying device installed on a large floating platform for dehydration and drying; the separated sand and gravel are discharged back to the bottom of the water or/and transported back to the shore by a sand barge to form a building material for sale;

(6) The silt slurry treated by the gravel garbage separation device is transported to a dewatering device and a drying device installed on a large floating platform for dehydration and drying treatment, and the moisture content of the sludge is reduced from ≥95% to ≤40%. Become dry sludge;

(7) Drying and drying the dehydrated and dried dry sludge and organic waste into a biochar using a retorting device installed on a large floating platform;

(8) transporting the produced biochar to the bottom of the water, purifying the water body and absorbing the organic pollutants released from the eutrophic compounds in the bottom soil to the water body, or/and transporting the charcoal soil back to the shore with the biochar barge For soil improvement;

(9) The sewage discharged from the dehydration device and the living facilities is first concentrated in the sewage pontoon, and then transported to the sewage purification device installed on the large floating platform for purification treatment and discharged into the lake water body of the reservoir;

(10) The diesel generator and steam generator installed on the large floating platform supply power to various facilities and equipment on the large floating platform and the working platform of the mud pump. Fuel tanks are used to fuel diesel generators, steam boilers are used to supply steam to steam generators; steam boilers are stored in fuel storage tanks;

(11) The living facilities installed on the large floating platform shall solve the accommodation, food and rest of the staff on the large floating platform; the domestic water required for the living facilities shall be supplied by the domestic water floating tank and the water supply pump.

In order to achieve the above method, the system for cleaning the mud of a lake reservoir on a large floating platform provided by the present disclosure mainly includes:

(1) Assembling large floating platforms on the surface of lakes and reservoirs where silt cleaning is carried out. The large floating platform consists of modular pontoons, driven pontoons, domestic water pontoons and sewage pontoons;

(2) Arrange sand and gravel garbage separation devices, dewatering devices, drying devices, dry distillation devices, sewage purification devices, diesel generators, diesel storage tanks, steam generators, steam boilers, fuel warehouses, living facilities, etc. on large floating platforms. Living facilities include container dormitories, container kitchens, container restaurants, container lounges, container offices;

(3) The suction sludge device installed on the surface working platform extracts the sludge from the bottom of the water, and transports the sludge to the gravel garbage separation device installed on the large floating platform through the conveying pipeline;

(4) The gravel garbage separation device separates the sludge from the gravel garbage, and transports the separated organic waste to the crushing equipment installed on the large floating platform for crushing;

(5) After the crushing, the organic waste is transported to the dewatering device and the drying device installed on the large floating platform for dehydration and drying; the separated sand and gravel are discharged back to the bottom or/and transported back to the shore by the transport sand barge to make building materials for sale;

(6) The silt slurry after the separation of the gravel garbage is transported to the dewatering device and the drying device installed on the large floating platform for dehydration and drying, and the water content of the sludge is reduced from ≥95% to ≤40%. Dry sludge

(7) The retorting device installed on the large floating platform is subjected to dry distillation treatment of dry sludge and organic waste after dehydration and drying to form biochar;

(8) The sewage purification device installed on the large floating platform discharges the sewage discharged from the dehydration device and the domestic sewage discharged from the living facilities into the water body after being purified and treated;

(9) Diesel generators and steam generators installed on large floating platforms supply electricity to various facilities and equipment on large floating platforms and mud pump working platforms; diesel storage tanks provide fuel for diesel generators, which are steam boilers a steam generator provides steam;

(10) Living facilities installed on large floating platforms to solve the accommodation, diet and rest of staff on large floating platforms. Living facilities include container dormitories, container kitchens, container restaurants, container lounges, and container offices.

The present disclosure will be further described in detail below with reference to the specific embodiments of the embodiments of the invention. It is to be noted that the various arrangements and/or devices shown in the drawings are only a preferred embodiment and are not intended to limit the disclosure.

As shown in FIG. 1-13, the method for cleaning the mud of a lake reservoir on the large floating platform 1 of the present disclosure mainly includes the following steps:

(1) As shown in Fig. 7D, on the water surface of the lake and the reservoir where the sludge is cleaned, the module pontoon 31, the drive pontoon 3, and the domestic water pontoon 5 are used by the mountain bolt 34, the connecting plate 35, and the connecting beam 67. The sewage pontoon 22 is assembled into a large floating platform 1;

As shown in Figures 7A to 7C, the module pontoon 31 is a well-known device, comprising a sealed compartment 11, a sealed hatch 35, a connecting post 65, a connecting port 68;

8A-8C, the driving pontoon 3 comprises a sealing compartment 11, a sealing hatch 35, a connecting post 65, a connecting port 68, a propeller 32, a driving device 33;

As shown in FIG. 9A to FIG. 9C, the sewage pontoon 22 includes a sealed tank 11, a sealed hatch 35, and a sewage tank 54; and is assembled by a mountain bolt 34 with a connecting plate 35 and a connecting beam 67;

As shown in FIGS. 10A to 10C, the domestic water pontoon 5 includes a sealed compartment 11, a sealed hatch 35, a connecting post 65, a connecting port 68, and a domestic water tank 56.

(2) As shown in FIG. 13, a gravel garbage separation device 12, a dewatering device 9, a drying device 15, a retorting device 16, a sewage purification device 17, a steam generator 18, a diesel generator 2 are arranged on the large floating platform 1. The diesel storage tank 21, the steam boiler 19, the fuel storage tank 20 and the living facilities, etc.; and the large floating platform 1 is moved to the working area of the reservoir lake water body 14 by the transport sand barge 4 and the driving pontoon 3; the transport sand barge 4 is a well-known device. The present disclosure does not strictly limit the equipment used for the sand transport barge 4, as long as it can meet the sand and gravel transportation.

(3) The position of the large floating platform 1 in the working area of the reservoir lake water body 14 is adjusted by the driving pontoon 3, and the position of the large floating platform 1 is fixed by the anchoring machine and the anchor 23; the windlass and the anchor 23 are known. The device, the present disclosure is not strictly limited to the anchoring machine and the anchor 23, as long as the large floating platform 1 can be parked.

(4) The sludge 58 is withdrawn from the bottom by a suction sludge device 6 mounted on the mud pump working platform 8, and the sludge 58 is conveyed through the conveying pipe 57 to the gravel garbage separating device 12 installed on the large floating platform 1.

(5) The gravel garbage in the sludge 58 is separated by the gravel garbage separating device 12, and the separated organic garbage 61 is transported to the crushing device 13 installed on the large floating platform 1 to be crushed.

(6) conveying the crushed organic waste 61 to the dewatering device 9 and the drying device 15 installed on the large floating platform 1 for dehydration and drying; discharging the separated sand and gravel 62 to the bottom of the water or/and using the sand barge 4 Shipped back to the shore to make building materials for sale.

(7) Dewatering and drying the sludge 59 separated from the gravel garbage by using the dewatering device 9 and the drying device 15 installed on the large floating platform 1, and reducing the water content of the sludge 59 from ≥95% to ≤40%. Become a dry sludge 60.

(8) The dry sludge 60 and the organic waste 61 which have been subjected to dehydration and drying treatment are subjected to dry distillation treatment using the pyrolysis device 16 installed on the large floating platform 1, and the biochar 63 is formed.

(9) transporting the produced biochar 63 back to the bottom, purifying the water body and absorbing the organic pollutants released from the eutrophication in the bottom soil to the water body and/or transporting it back to the shore with the biochar barge 24 for soil improvement. .

(10) The sewage 64 discharged from the dewatering device 9 and the living facility is first discharged into the sewage pontoon 22, and then transported from the sewage pontoon 22 to the sewage purification device 17 installed on the large floating platform 1 for purification treatment and discharged. The reservoir lake has 14 water bodies.

(11) The steam generator 18 and the diesel generator 58 installed on the large floating platform 1 supply electric power to various facilities and equipment on the large floating platform 1. The diesel storage tank 21 supplies fuel to the diesel generator, and the steam boiler supplies steam to the steam generator.

(12) As shown in Fig. 2-6, various living facilities are installed on the large floating platform 1, and the accommodation, diet, and rest of the staff on the large floating platform 1 are solved.

In order to implement the above method, as shown in FIG. 2-13, the apparatus for cleaning the mud of the lake reservoir on the large floating platform 1 provided by the present disclosure mainly includes:

(1) Assembling a large floating platform 1 on the water body 14 of the lake and reservoir where the sludge is cleaned, the large floating platform adopts the mountain bolt 34, the connecting plate 35, the connecting beam 67, the module floating box 31, the driving pontoon 3, the domestic water floating tank 5. The sewage pontoon 22 is assembled;

The module pontoon 31 is composed of a sealed compartment 11, a connecting post 65, a connecting port 68, and a sealed hatch 35.

The drive pontoon 3 is composed of a seal chamber 11, a connecting post 65, a connection port 68, a sealed hatch 35, a propeller 32, and a drive unit 33.

The domestic water pontoon 5 is composed of a sealed tank 11, a connecting column 65, a connecting port 68, a sealed hatch 35, a living water tank 56, and a water supply pump 57.

The sewage pontoon 22 is composed of a sealed tank 11, a connecting column 65, a connecting port 68, a sealed hatch 35, and a sewage tank 54.

(2) Arranging a gravel garbage separation device 12, a dewatering device 9, a drying device 15, a retorting device 16, a sewage purification device 17, a steam generator 18, a diesel generator 2, a steam boiler 19, and living facilities on a large floating platform 1. Wait;

The sand and gravel garbage separating device 12 is a well-known device. The present disclosure does not strictly limit the device used for the sand and gravel garbage separating device 12, as long as it can be conveniently transported by the automobile and installed on the large floating platform 1, and can satisfy the sand and gravel in the sludge. Garbage can be separated.

The dewatering device 9 is a well-known device. The device of the present disclosure does not strictly limit the device used in the dewatering device 9. As long as it can be conveniently transported by the automobile and installed on the large floating platform 1, and can be used for dehydrating the sludge, the belt pressing can be adopted. Filter or / and plate and frame filter press.

The drying device 15 is a well-known device. The device disclosed in the present disclosure is not strictly limited. As long as it can be conveniently transported by the automobile and installed on the large floating platform 1 and can be used to dry the sludge, a drum dryer can be used. .

The steam generator 18 is a well-known device. The present disclosure does not strictly limit the device used for the steam generator 18, as long as it can be conveniently transported and installed on the large floating platform 1, and can satisfy the work of the large floating platform 1 and the mud pump. The facilities on the platform 8 can be powered, and a steam turbine generator can be used.

The diesel generator 2 is a well-known device. The present disclosure does not strictly limit the device used for the diesel generator 2, as long as it can be conveniently transported and installed on the large floating platform 1, and can satisfy the work of the large floating platform 1 and the mud pump. The facilities on the platform 8 can be powered.

The diesel storage tank 21 is a well-known equipment. The present disclosure is not strictly limited to the diesel storage tank 21, as long as it can be conveniently transported by the automobile and installed on the large floating platform 1, and can satisfy the diesel generator oil on the large floating platform 1. .

The steam boiler 19 is a well-known device, and the present disclosure is not strictly limited to the steam boiler 19 as long as it can be conveniently transported by the automobile and mounted on the large floating platform 1, and can satisfy the steam generator steam on the large floating platform 1.

The fuel storage tank 20 is a well-known equipment. The present disclosure does not strictly limit the fuel storage tank 20 as long as it can be conveniently transported by the automobile and installed on the large floating platform 1, and can satisfy the fuel for the steam boiler 19 on the large floating platform 1.

The sewage purification device 17 is a well-known device. The present disclosure does not strictly limit the device used in the sewage purification device 17, as long as it can be conveniently transported by the automobile and installed on the large floating platform 1, and can satisfy the sewage purification.

The retorting device 16 is a well-known device. The present disclosure does not strictly limit the equipment used in the retorting device 16. As long as it can satisfy the sludge and organic waste retorting, the retorting device disclosed in Chinese Patent No. ZL 200810135666.2, ZL 201010510277.0 can be used.

(3) The suction sludge device 8 installed on the mud pump working platform 8 draws the sludge from the bottom of the water, and transports the sludge through the conveying pipe 57 to the sand and gravel garbage separating device 12 installed on the large floating platform 1;

The mud pump working platform 8 is composed of a plurality of module pontoons 31. The present disclosure does not strictly limit the module pontoon 31 as long as the suction sludge device 8 can be installed.

The suction sludge device 8 is a well-known device, and the present disclosure does not strictly limit the equipment used for the suction sludge device 8, as long as it can satisfy the suction of the sludge without disturbing the water body.

(4) The gravel garbage separating device 12 separates the sludge from the gravel garbage, and transports the separated organic waste to the crushing device 13 installed on the large floating platform 1 for crushing.

(5) conveying the crushed organic waste to the dewatering device 9 and the drying device 15 installed on the large floating platform 1 for dehydration and drying; the separated sand and gravel is discharged back to the bottom of the water, or/and is transported back to the shore by barge. Building materials are sold.

(6) The dewatering device 9 and the drying device 15 installed on the large floating platform 1 after the separation of the gravel garbage separation treatment are subjected to dehydration and drying treatment, and the moisture content of the sludge is reduced from ≥95% to ≤40%;

(7) The dry sludge and organic waste after dehydration and drying are transported to a retorting device installed on the large floating platform 1 to be subjected to dry distillation to prepare biochar.

(8) The dewatering device 9 and the sewage discharged from the living facility are first transported to the sewage floating tank 22 installed on the large floating platform 1, and then transported by the sewage floating tank 22 to the sewage purification device 17, which is subjected to purification treatment and discharged into the water body.

(9) The diesel generator 2 and the steam generator 18 installed on the large floating platform 1 supply electric power to various facilities and equipment on the large floating platform 1;

(10) Living facilities installed on the large floating platform 1 to solve the accommodation, diet, and rest of the staff on the large floating platform 1. As shown in Figures 2-6, the living facilities include a container dormitory 29, a container kitchen 25, a container restaurant 27, a container control room 28, and a container office 26. The domestic water required for living facilities is supplied by the domestic water pontoon 5 and the water supply pump;

A high and low bed 41, a small table and chair 42, a closet 43, a washing machine 37, a shower room 38, a toilet 39, and a wash basin 40 are installed in the container dormitory 29.

A cooktop 45, a sterilizer 46, an air conditioner 47, a refrigerator 48, a steaming oven 49, a sink 50, and a water heater 51 are installed in the container kitchen 25.

A dinette 44 is installed in the container restaurant 27.

A control cabinet 30 is installed in the container control room.

A work table 52, a desk chair 53, and a wash basin 36 are installed in the container office 26.

The domestic water required for the living facility is supplied by the domestic water pontoon 5 and the water supply pump 57.

The above description is only a preferred embodiment of the present disclosure, and is not intended to limit the present disclosure in any way. Any person skilled in the art can make many possible variations and modifications to the technical solutions of the present disclosure by using the methods and technical contents disclosed above, or modify the equivalents of equivalent changes without departing from the scope of the present disclosure. Implementation example. Therefore, any simple modifications, equivalent changes, and modifications of the above embodiments may be made without departing from the scope of the present disclosure.

Claims

A method for environmentally dredging large reservoirs and lakes includes the following steps:

Step 1. Place the floating platform in the work area and fix it;

Step 2: using the suction sludge device on the floating platform to extract the sludge at the bottom of the working area, and transport it to the pretreatment equipment on the floating platform for pretreatment to obtain the separated and dehydrated and dried sludge and organic waste;

Step 3: dry distillation and organic waste after separation, dehydration and drying are subjected to dry distillation treatment by using a retorting device on a floating platform to prepare biochar;

In step 4, the produced biochar is transported back to the bottom and/or used for soil improvement.
The method according to claim 1, wherein the floating platform is formed by assembling a modular pontoon, a driving pontoon, a sewage pontoon and a domestic water pontoon; wherein the sewage water tank is used for collecting sewage generated during the operation and Domestic sewage, domestic water tanks are used to store domestic water.
The method according to claim 2, wherein the module pontoon, the driving pontoon, the sewage pontoon and the domestic water pontoon are assembled by using mountain bolts, connecting plates and connecting beams.
The method of claim 2 wherein said floating platform is further provided with a power supply unit comprising a diesel generator and/or a steam generator for use in various facilities on the floating platform and The equipment supplies electricity.
The method of claim 2, wherein the floating platform is further provided with living facilities, including container dormitories, container kitchens, container restaurants, container lounges, and/or container offices.
The method of claim 1 wherein said pretreatment device in step 2 comprises a sandstone waste separation device, a crushing device, a dewatering device/drying device.
The method according to claim 6, wherein the sand and gravel garbage separating device is configured to separate the sludge from the sand and gravel, and transport the separated organic waste to a crushing device for crushing; the crushed organic garbage is transported. Dehydration and drying treatment to the dehydration/drying device.
The method of claim 6 wherein the sand separated from the sand and gravel separation unit is discharged back to the bottom and/or transported back to the shore to form a building material.
The method according to claim 6, wherein the dewatering/drying device reduces the moisture content of the sludge from ≥95% to ≤40% when subjected to dehydration and drying treatment.
A large-scale reservoir and lake environmental dredging system, including:

The floating platform is assembled by at least a module pontoon and a driving pontoon;

a suction sludge device, a pretreatment device and a carbonization device disposed on the floating platform; wherein the suction sludge device is used for extracting sludge from the bottom of the water; and the pretreatment device is used for pretreating the extracted sludge to obtain Separation, pulverization, dehydration, drying treatment of sludge and organic waste; a retorting device is used for dry distillation of organic sludge and organic waste after separation, pulverization, dehydration and drying to form biochar.
The system according to claim 10, wherein said floating platform further comprises a sewage pontoon and a domestic water pontoon, said sewage pontoon and domestic water pontoon and said modular pontoon and driving pontoon adopting a mountain The type bolt, the connecting plate and the connecting beam are assembled together; wherein the sewage levitation tank is used for collecting the sewage discharged from the pretreatment device and the domestic sewage, and the domestic water floating tank is used for storing the domestic water.
The system according to claim 11, wherein the large-scale reservoir and lake environmental dredging system further comprises a sewage purification device, wherein the sewage purification device is used for purifying sewage stored in the sewage water tank, and discharging after reaching the standard.
The system according to claim 10, wherein said system for large-scale reservoir and lake environmental dredging further comprises a power supply unit comprising a diesel generator and/or a steam generator for use on a floating platform The various facilities and equipment supply electricity.
The system of claim 10, wherein the system for environmental dredging of large reservoirs and lakes further comprises living facilities, including container dormitories, container kitchens, container restaurants, container lounges, and/or containers. office.