River and lake embankment hollow pile along the coast to arrange methane well

Abstract

This invention relates to a method for constructing biogas wells along the banks of rivers and lakes using hollow piles. The method involves driving slender, hollow pile wells and main and auxiliary control wells in a straight line along both sides of the embankment road surface. The bottom of each well leads to a submerged biogas digester. These digesters are arranged in a straight line within a tunnel along the embankment, forming an underground dragon. The slender wells are interconnected via five-way pipes, meaning that water can be poured into the main and auxiliary wells to fill all other slender wells and submerged digesters, and gas can be extracted from the main and auxiliary wells to remove biogas from all other slender wells and submerged digesters. Three normally closed leak-proof valves are installed between adjacent submerged digesters to allow residual waste liquid in the wells and digesters to be discharged back into rivers, lakes, or fertilized fields. This invention utilizes the raw freshwater from rivers and lakes to produce biogas through open irrigation. It uses pile drivers and tunnel boring machines to excavate "ten thousand wells and ten thousand pools double tunnels" along the banks of rivers and lakes, which are freshwater biogas energy tunnels. The scaffolded pile wells can be used to reinforce flood control dikes, and the tunnels are protected against explosions in peacetime and bombings in wartime. Vehicles are allowed to pass through the tunnels.

Description

Technical Field

[0001] This invention relates to a method for constructing biogas wells along the banks of rivers and lakes using hollow piles. The method involves driving slender, hollow pile wells and main and auxiliary control wells in a straight line along both sides of the embankment road surface. The bottom of each well leads to a submerged biogas digester. These digesters are arranged in a straight line within a tunnel along the embankment, forming an underground dragon. The slender wells are interconnected via five-way pipes, meaning that water can be poured into the main and auxiliary wells to fill all other slender wells and submerged digesters, and gas can be extracted from the main and auxiliary wells to remove biogas from all other slender wells and submerged digesters. Three normally closed leak-proof valves are installed between adjacent submerged digesters to allow residual waste liquid in the wells and digesters to be discharged back into rivers, lakes, or fertilized fields. This invention utilizes the raw freshwater from rivers and lakes to produce biogas through open irrigation. It uses pile drivers and tunnel boring machines to excavate "ten thousand wells and ten thousand pools double tunnels" along the banks of rivers and lakes, which are freshwater biogas energy tunnels. The scaffolded pile wells can be used to reinforce flood control dikes, and the tunnels are protected against explosions in peacetime and bombings in wartime. Vehicles are allowed to pass through the tunnels. Background Technology

[0002] Existing large rivers and lakes are rich in organic matter and anaerobic gas-producing bacteria, yet they cannot produce biogas. There are five main reasons for this: First, once river water flows, the dissolved oxygen content increases dramatically, making it impossible to form an anaerobic environment. In other words, when water flows without stagnation, biogas cannot be produced. Second, large lakes lack flowing water compared to rivers. Although they have an anaerobic environment, they lack the abundant and continuous supply of organic matter found in rivers. Third, rivers and lakes lack sealed biogas digesters to collect biogas, causing the produced biogas to escape and disappear into the air. Fourth, the ocean has everything except anaerobic bacteria because seawater is too salty, almost like a "sea salt curing basin," strongly inhibiting the growth, reproduction, fermentation, and gas production of bacteria and microorganisms. Fifth, any anaerobic bacteria that ferment and produce gas must choose a fixed location to settle down; they need a "home." They are most vulnerable to migrating and drifting in flowing water, as all gas-producing tools placed in their "home" are scattered by the current. This suggests that deep wells are the only stable "home" for gas-producing bacteria. In short, the more turbulent the flow of freshwater, the more organic matter and gas-producing bacteria it can bring from afar. Once this abundant freshwater fills a sealed biogas digester or well, nothing needs to be done; after ten days to two weeks or even longer, biogas will be produced. Moreover, the deeper the well, the better the insulation, as anaerobic gas-producing bacteria require specific water temperatures within the well or digester for proper fermentation. It also reminds us that thicker well walls provide better insulation, especially since wells should not be too close together. For example, a thick layer of soil can be used to fill the outside of vertical wells as an insulating wall. Therefore, drilling wells in the soil along the banks of rivers and lakes is the best option.

[0003] This invention can provide fuel for military industries and is not afraid of enemy bombing during wartime. First, because the enemy, when searching through thousands of wells along the dikes, cannot distinguish which well is the main or auxiliary control well in the maze, they cannot find a bombing target and cannot make a move. Second, because even if the main or auxiliary control wells are bombed, there is no methane leakage; it is just a dry well being destroyed. Third, because in negative pressure mode, there is no methane in any of the wells or pools (it has been completely extracted). Fourth, because it has extremely high secrecy, for example, dike construction that provides fuel for military industries could be mistakenly reported by spies as a flood control project. Fifth, because the well and pool bodies are almost entirely hidden underground, only the surface can be bombed.

[0004] This invention is designed to prevent explosions in peacetime and bombings in wartime, primarily because all biogas wells and biogas digesters are completely sealed, and the biogas pumps attached to the main and auxiliary gas storage tanks connected to the main and auxiliary wells pump gas continuously day and night to maintain negative pressure inside the wells and digesters. In other words, there is absolutely no biogas in any of the biogas wells and digesters in this invention, so there is no risk of explosion or bombing.

[0005] This invention uses "ten thousand separate pools" instead of "one long, continuous pool." Its purpose and ingenuity are to prevent stagnant water from becoming flowing water and to prevent gas-producing bacteria from finding a "home" in the flowing water. These inconspicuous and invisible gas-producing bacteria naturally prefer stagnant water, purely by instinct! Summary of the Invention

[0006] This invention relates to a method for constructing biogas wells along the banks of river and lake embankments using hollow piles. The overall technical solution involves driving hollow vertical piles in a straight line along both sides of the embankment road surface to serve as slender wells. One upstream well is selected as the main control well, and one downstream well as an auxiliary control well. The bottom opening of each slender well leads directly to a watertight and gas-free underground biogas digester. This underground biogas digester is slightly or significantly lower than the riverbed, creating a deep, extremely low-lying well. All the underground biogas digesters are arranged in a straight line along both sides of the roadbed within a tunnel directly beneath the embankment, forming a long underground array. The wellhead of each slender well has five... The five-way pipe structure consists of an upper section connecting to the wellhead sealing cap, a lower section connecting to the well body, and a bottom opening connecting to the dedicated underground biogas digester. Two connecting sections connect adjacent wellheads, one in front of the other. The final connecting section laterally connects to the wellheads of the parallel wells on the other side of the embankment road surface. All adjacent wellheads, i.e., the direct connection points of the connecting pipes, are equipped with normally open airtight valves. This five-way pipe ensures that all the elongated wells are interconnected, thereby reinforcing the embankment like a scaffold. The interconnecting pipes also ensure that water can be injected into only one main control well or one auxiliary control well. The biogas is automatically drawn into and filled into all the elongated wells and all the underground biogas digesters. Biogas can be completely extracted from all the elongated wells and underground biogas digesters simply by collecting it from the opening of one main control well or one auxiliary control well. The main control well and the auxiliary control well do not have wellhead covers; instead, they have biogas outlets with normally open negative pressure valves at the locations where covers would normally be installed. This outlet is used to supply gas to the main and auxiliary gas storage tanks. The main and auxiliary gas storage tanks are equipped with their own gas pumps, and only one main and one auxiliary gas pump are needed to maintain negative pressure within all the elongated wells and all the underground biogas digesters. The wellhead is normally closed (to maintain negative pressure in the well pool). It is only occasionally opened to facilitate mechanical dredging operations to remove sludge and residual waste liquid from the bottom of the well and pool for use as fertilizer (organic fertilizer). Three normally closed leak-proof valves are installed between the adjacent underground biogas digesters. These valves are only occasionally opened to allow valve operators, pumps, or robots inside the dike tunnel to return the residual waste liquid from the underground biogas digesters to the diversion channel inside the dike tunnel for centralized recycling and fertilizer, or to directly discharge it outside the dike tunnel to be integrated into the river or lake water for fish farming. The main control well and the auxiliary control well are equipped with their own water pumps at their wellheads.The water pump draws fresh water (from rivers or lakes) from the nearest point to the main control well or auxiliary control well, filling both wells. This water then flows automatically through the interconnecting pipes to fill all the elongated wells and the biogas digesters located beneath them. Afterward, the wellheads of the main control well and auxiliary control wells are closed and sealed (because all the elongated wells, except the main control well and auxiliary control well, are equipped with normally closed wellhead covers). After standing for several days, months, or longer, biogas will be produced.

[0007] In the plan, the normally open airtight valve between the wellheads refers to a valve that only needs to be closed occasionally. Specifically, it is closed only when a specific long, narrow well needs temporary opening for maintenance, unblocking, or material feeding. The three air valves closest to the well are the upstream valve, downstream valve, left valve, and right valve. Closing these valves prevents the air pump from drawing in air instead of biogas during wellhead opening operations, thus preventing negative pressure failure. Temporary material feeding, for example, does not object to villagers along river or lake embankments or the government adding food scraps, kitchen waste, or domestic sewage to the wellheads as biogas feedstock.

[0008] In the plan, the underground biogas digesters located along the banks of major rivers and embankments must be replaced by a single, long, multi-unit system of "ten thousand separate digesters." This ensures that each digester contains stagnant water to facilitate biogas production by anaerobic bacteria. Otherwise, the elevation differences within a single, long digester would inevitably result in flowing water, preventing biogas production. However, if the river is not a major river but a lake with little or no elevation difference, then a single, super-long digester is sufficient instead of a system of "ten thousand separate digesters."

[0009] In this design, the thinner the well, the better for piling and maintenance. However, it should ideally not be thinner than the maximum combined piling capacity of traditional piling machines, which are also the thickest and deepest.

[0010] In the plan, the freshwater refers to untreated raw water in major rivers and lakes, which may include naturally diluted domestic sewage with limited concentration discharged along the banks of rivers or lakes.

[0011] In the plan, the Wodi Tunnel is equipped with tunnel waste residue and waste liquid inspectors or robots, who are responsible for inspecting the three normally closed leak-proof valves in the brightly lit tunnel with vehicles shuttling back and forth, to see if there are any abnormal phenomena of water or air leakage when the valve is normally closed, and whether the waste residue and waste liquid can be smoothly drained when the valve is occasionally opened.

[0012] In this proposed solution, the underground biogas digester can be omitted, and instead, the lowest section of the elongated well can be used instead. The advantage is simpler construction, but the disadvantage is that the freshwater capacity required for biogas production is relatively small.

[0013] In this design, the embankment tunnels can be designed as ordinary roads or expressways to allow vehicles to travel within them. The embankment tunnels located on the left and right sides of the riverbed are mutually opposite traffic routes, and the roadbed within the tunnels should be higher than the waste residue and waste liquid discharge ditches or sewers. Taking the embankment tunnels on the Yangtze River as an example, one side of the embankment's embankment tunnel is an upstream lane for vehicles traveling from Shanghai to Chongqing, while the other side's embankment tunnel is a downstream lane for vehicles traveling from Chongqing to Shanghai. Alternatively, the entire Yangtze River channel may be straightened to accommodate the expressway-style embankment tunnels.

[0014] The proposed solution includes a coarse filter at the pump pipe suction head at the low inlet of the water pump to filter out fish of all sizes, allowing only smaller fish and shrimp, organic matter, fresh water, and sludge to be pumped into the elongated well and the underlying biogas digester. In other words, even if the coarse filter intercepts all fish and shrimp, leaving only organic matter, fresh water, and sludge to be pumped into the elongated well and the underlying biogas digester, the invention can still produce a large amount of biogas (but if fish and shrimp are pumped into the digester, the biogas production will increase dramatically).

[0015] In the scheme, the main control well and the auxiliary control well can cooperate with each other in function and can replace each other in critical situations, so as to ensure that the failure of a single slender well, especially when it is opened for maintenance, will not affect the adjacent normal wells, causing them to be unable to maintain the negative pressure and thus unable to deliver gas or leak gas in vain.

[0016] In the proposed design, for large rivers with significant elevation differences, the elongated wells should be arranged in sections to ensure that the elevation difference between the upstream well (the main control well) and the downstream well (the auxiliary control well) within each section is not too large. Taking the Yangtze River as an example, the section from Chongqing to Shanghai should be divided into at least dozens or even hundreds of sections, each equipped with a main control well, an auxiliary control well, and main and auxiliary gas storage tanks. Otherwise, without this segmented design, the biogas digester and the three normally closed leak-proof valves located in Shanghai would not be able to withstand the water pressure difference from Chongqing due to the low elevation, leading to malfunction and equipment damage; for example, the normally closed valve might become a normally open valve and fail. In contrast to large rivers, large lakes have almost no elevation difference, making the segmented design and the upstream / downstream description unnecessary or redundant. Only one main control well, one auxiliary control well, and one main and auxiliary gas storage tank are needed along the lake's shoreline.

[0017] In this scheme, after gas production is completed, it is occasionally necessary to open the three normally closed leak-proof valves so that when discharging waste residue and waste liquid, it is not necessary to open the valves everywhere. Only the leak-proof valve of the corresponding embankment section downstream of the riverbed needs to be opened, unless the amount of waste residue is much greater than the amount of waste liquid. Even if the amount of waste residue is much greater than the amount of waste liquid, water can be added temporarily to dilute it, and it is still possible to open only one valve instead of opening valves everywhere.

[0018] In the solution, "upstream and downstream" and "one before and one after" mean the same thing in terms of direction. Detailed Implementation

[0019] This embodiment describes a method for installing biogas wells along the banks of river and lake embankments using hollow piles. Specifically, hollow vertical piles are driven in a straight line along both sides of the embankment road surface to serve as slender wells. One upstream well is selected as the main control well, and one downstream well as an auxiliary control well. The bottom opening of each slender well leads directly to a watertight, gas-free, underground biogas digester. This digester is slightly or significantly lower than the riverbed, creating a deep, extremely low-lying well. All the underground biogas digesters are arranged in a straight line along both sides of the roadbed within a tunnel directly beneath the embankment, forming a long underground array. The wellhead of each slender well is... The five-way pipe structure consists of an upper section connecting to the wellhead sealing cap, a lower section connecting to the well body and via an opening at the bottom to the dedicated underground biogas digester. The front and rear sections connect to the wellheads of adjacent slender wells, while the final section connects laterally to the wellheads of the parallel slender wells on the other side of the embankment road surface. All adjacent wellheads, i.e., the direct connection points of the connecting pipes, are equipped with normally open airtight valves. This five-way pipe structure ensures that all the slender wells are interconnected, thereby reinforcing the embankment like a scaffold. Furthermore, the interconnecting pipes ensure that water only needs to be pumped into one main control well or one auxiliary control well. It can automatically flow to and fill all the aforementioned elongated wells and all the aforementioned underground biogas digesters. It only needs to collect biogas from the opening of one of the main control wells or one of the auxiliary control wells to completely remove the biogas from all the elongated wells and all the underground biogas digesters. The main control wells and auxiliary control wells do not have wellhead covers; instead, they have biogas outlets with normally open negative pressure valves at the locations where the wellhead covers are replaced. This outlet is used to supply gas to the main and auxiliary gas storage tanks. The main and auxiliary gas storage tanks are equipped with their own gas pumps, and only one main and one auxiliary gas pump are needed to maintain negative pressure inside all the elongated wells and all the underground biogas digesters. The wellhead is normally closed (to maintain negative pressure in the well pool). It is only occasionally opened to facilitate mechanical dredging operations to remove sludge and residual waste liquid from the bottom of the well and pool for use as fertilizer (organic fertilizer). Three normally closed leak-proof valves are installed between the adjacent underground biogas digesters. These valves are only occasionally opened to allow valve operators, pumps, or robots inside the dike tunnel to return the residual waste liquid from the underground biogas digesters to the diversion channel inside the dike tunnel for centralized recycling and fertilizer, or to directly discharge it outside the dike tunnel to be integrated into the river or lake water for fish farming. The main control well and the auxiliary control well are equipped with their own water pumps at their wellheads.The water pump draws fresh water (from rivers or lakes) from the nearest point to the main control well or auxiliary control well, filling both wells. This water then flows automatically through the interconnecting pipes to fill all the elongated wells and the biogas digesters located beneath them. Afterward, the wellheads of the main control well and auxiliary control wells are closed and sealed (because all the elongated wells, except the main control well and auxiliary control well, are equipped with normally closed wellhead covers). After standing for several days, months, or longer, biogas will be produced.

Claims

1. A type of biogas well system with hollow piles along river and lake embankments, characterized in that... Hollow vertical piles are driven in a row along both sides of the road surface on the banks of rivers and lakes to serve as slender wells. One upstream well is selected as the main control well, and one downstream well as an auxiliary control well. The bottom opening of each slender well leads directly to a watertight and gas-free underground biogas digester. All the underground biogas digesters are arranged in a row along both sides of the roadbed inside a tunnel directly below the embankment, forming a long underground array. The wellhead of each slender well has a five-way pipe structure: the upper part connects to its own wellhead sealing cap, the lower part connects to its own well body, and the bottom opening connects to the dedicated underground biogas digester. The two ends can connect to the wellheads of adjacent slender wells, one after the other. The next horizontal connection is made to the manholes of the parallel, elongated wells on the other side of the embankment road surface; a normally open airtight valve is installed between the manholes of all adjacent wells, i.e., at the direct connection points of the connecting pipes; the five-way pipe ensures that all the elongated wells are interconnected, thereby reinforcing the embankment like a scaffold, and the interconnecting pipes ensure that water only needs to be poured into one of the main control wells or one of the auxiliary control wells to automatically flow to and fill all the elongated wells and all the biogas digesters underneath, and biogas only needs to be collected from one of the main control wells or one of the auxiliary control wells to completely remove the biogas from all the elongated wells and all the biogas digesters underneath. The main control well and the auxiliary control well do not have wellhead covers. Instead, they have biogas outlets with normally open negative pressure valves at the locations where the wellhead covers would be installed. These outlets supply biogas to the main and auxiliary storage tanks. The main and auxiliary storage tanks are equipped with their own pumps, and only one main and one auxiliary pump are needed to maintain negative pressure within all the elongated wells and the biogas digesters at the bottom of the wells. The wellhead sealing caps are normally closed to maintain negative pressure within the digesters. Occasionally, these caps are opened only to facilitate mechanical dredging operations to remove sludge, residue, and waste liquid from the bottom of the wells and digesters for use as fertilizer. Three normally closed leak-proof valves are installed between adjacent digesters, and these valves are opened only occasionally for convenience. After gas production is completed, valve operators, valve-opening pumps, or valve-opening robots inside the embankment tunnel will return the residual waste liquid in the underground biogas digester to the diversion channel inside the embankment tunnel for centralized recycling and fertilization, or directly discharge it outside the embankment tunnel to be integrated into the river and lake water. The wellheads of the main control well and the auxiliary control well are equipped with water pumps, which can be used to draw river and lake water from the nearest point to the main control well and the auxiliary control well to fill them. The water will then automatically flow to and fill all the slender wells and all the underground biogas digesters through the interconnected pipelines. Then, it is only necessary to close and seal the wellheads of the main control well and the auxiliary control well, and after standing for several days, months or longer, biogas can be produced.

2. The biogas wells arranged along the banks of hollow piles for river and lake embankments as described in claim 1, characterized in that... The underground biogas digester can be changed from "ten thousand separate digesters" to "one super long digester" (for example, along the shore of a lake with no elevation difference).

3. The biogas wells arranged along the banks of hollow piles for river and lake embankments as described in claim 1, characterized in that... The underground biogas digester is slightly or much lower than the riverbed, thus becoming an extremely deep well with an extremely low-level digester.

4. A biogas well system arranged along the banks of hollow piles for river and lake embankments as described in claim 1, characterized in that... We do not object to villagers or the government along the river and lake embankments putting food scraps, kitchen waste, and domestic sewage into the aforementioned narrow well openings as raw materials for biogas production.

5. A biogas well system arranged along the banks of a river or lake embankment using hollow piles as described in claim 1, characterized in that... The embankment tunnel can be designed as a regular road or a highway to allow vehicles to pass through it.

6. A biogas well system arranged along the banks of hollow piles for river and lake embankments as described in claim 1, characterized in that... For large rivers with significant elevation differences, the design of the slender wells should be segmented to ensure that the elevation difference between the upstream well (the main control well) and the downstream well (the auxiliary control well) in each segment is not too large.

7. A biogas well system arranged along the banks of hollow piles for river and lake embankments as described in claim 1, characterized in that... After gas production is completed, it is occasionally necessary to open the three normally closed leak-proof valves so that when discharging waste residue and waste liquid, it is not necessary to open the valves everywhere, but only to open the leak-proof valves of the corresponding embankment section downstream of the riverbed.

8. A biogas well system arranged along the banks of hollow piles for river and lake embankments as described in claim 1, characterized in that... The underground biogas digester can also be omitted, and instead, the lowest section of the slender well can be used directly.

9. A biogas well system arranged along the banks of hollow piles for river and lake embankments as described in claim 1, characterized in that... All of the aforementioned slender wells, except for the main control well and the auxiliary control well, are equipped with wellhead covers by default, and these covers are normally closed.

10. A biogas well system arranged along the banks of hollow piles for river and lake embankments as described in claim 1, characterized in that... A coarse filter screen is installed at the pump pipe suction head at the low water inlet of the water pump to filter out fish of all sizes, allowing only smaller fish and shrimp, organic matter, fresh water and silt to be pumped into the long and narrow well and the biogas digester at the bottom of the well.