Floating cover device of landfill leachate regulating reservoir
By using a floating cover device on the garbage leachate adjustment tank, including splicing membrane body, float and gravity pressing pipe, the problems of insufficient sealing and inconvenient construction in the prior art are solved, and the effect of firm sealing and flexible construction is achieved.
Patent Information
- Application Number
- CN202421064417.X
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-05-15
- Publication Date
- 2025-02-11
- Estimated Expiration
- 2034-05-15
AI Technical Summary
The existing garbage leachate regulation tanks have shortcomings in terms of sealing and construction convenience, which leads to the diffusion of foul smell and the amount of leachate that is difficult to control.
A floating cover device is adopted, including a membrane body, a float and a gravity pressure tube. The membrane body is spliced to form a covering pool surface and slope. The float comes into contact with the leachate. The gravity pressure tube increases the weight of the membrane surface and collects rainwater.
It achieves a firm and durable coverage seal, flexible and efficient construction, effectively preventing the spread of foul odor and reducing the amount of leachate.
Smart Images
Figure CN222454716U_ABST
Abstract
Description
Technical Field
[0001] The invention belongs to the technical field of sewage treatment, and in particular relates to a floating cover device for a garbage leachate regulating tank. Background Art
[0002] Generally, large-scale domestic waste landfills are divided into corresponding supporting areas such as office management area, landfill storage area, leachate regulating pool, leachate treatment plant, biogas treatment plant, machine repair workshop, etc. During the stacking and landfilling process, garbage produces a high concentration of organic or inorganic liquid due to biochemical degradation such as compaction and fermentation, and under the seepage of precipitation and groundwater. We call it garbage leachate, also known as leachate. There are many factors that affect the generation of leachate, mainly the rainfall in the garbage stacking and landfill area, the nature and composition of the garbage, the anti-seepage treatment of the landfill, and the hydrogeological conditions of the site. The atmospheric precipitation in the same area in the same year is extremely uneven. In order to stabilize the treatment scale and water quality of the leachate treatment station, the landfill must be equipped with a leachate regulating pool. The regulating pool is a structure with equalization, storage and regulation functions or sewage pretreatment functions set up in front of the leachate treatment system. After the high-concentration leachate generated by the garbage is transported to the regulating pond through a dedicated pipeline, the foul smell emitted from the exposed liquid surface in the pond will cause air pollution to the surrounding environment, seriously affecting the environment, and the regulating pond will become the largest source of pollution in the surrounding environment. At the same time, during the rainy season, all the rainwater collected on the exposed surface of the regulating pond will become leachate, which is contrary to the principle of clean and dirty water diversion. However, this problem is often ignored in the design of regulating ponds in most domestic landfills, and they suffer greatly during operation. Therefore, it is particularly important to take engineering measures to effectively prevent the spread of foul smells and reduce the amount of leachate, and to collect and treat the gases generated in the pond.
[0003] In order to meet the annual storage capacity and serve as an anaerobic pond, the volume of a general landfill regulating pond is often tens of thousands of cubic meters, and some are even hundreds of thousands of cubic meters. To cover such a large area of the pond without affecting the use of the regulating pond, effective and reasonable engineering measures must be taken. Usually, the regulating pond has a large area and a large span. When covering the regulating pond, if a steel structure is used to build the cover, the engineering cost is high and it is difficult to achieve a sealing effect. In addition, the steel structure is susceptible to corrosion in a sewage and odor environment for a long time. Usually, the regulating pond has a large area and a large span. It is inconvenient to cover the regulating pond. The engineering cost is high and it is difficult to achieve a sealing effect. Especially in the landfill sewage regulating pond that is already filled with sewage and cannot be emptied, there is no ideal construction method. Summary of the invention
[0004] In order to overcome the deficiencies of the prior art, the present invention provides a floating cover device for a garbage leachate regulating tank, which has the advantages of firm and durable covering and sealing, flexible on-site construction and high construction efficiency.
[0005] The technical solution is as follows:
[0006] A floating cover device for a landfill leachate regulating tank, characterized in that the floating cover device includes a membrane body, a float, and a gravity pressure pipe, the float is arranged under the membrane body and is in direct contact with the landfill leachate, the membrane body covers the water surface of the regulating tank, and the gravity pressure pipe is arranged above the membrane body.
[0007] Furthermore, the membrane body is a spliced membrane body.
[0008] Furthermore, the spliced membrane body includes a water surface membrane splicing body and a slope membrane splicing body, the water surface membrane splicing body is formed as a whole by welding n pieces of water surface membrane, the slope membrane splicing body is formed as a whole by welding n pieces of slope membrane, the water surface membrane splicing body is closed and covers the water surface of the regulating pool, the slope membrane splicing body is closed and covers the slope of the regulating pool, one end of the slope membrane splicing body is anchored outside the regulating pool, and the other end is connected to the water surface membrane splicing body.
[0009] Furthermore, the slope membrane and the water surface membrane are cut according to the required size; the water surface membrane is laid on the water surface along the transverse direction of the membrane, and the slope membrane is laid on the slope of the regulating tank along the longitudinal direction of the membrane. Under normal circumstances, the film has two directions: longitudinal and transverse. The longitudinal direction refers to the direction in which the film material is unfolded from the roller, and its unfolding direction is consistent with the direction of the roller axis. The transverse direction refers to the direction in which the film material is unfolded from the roller, and its unfolding direction is consistent with the vertical direction of the roller axis. Because there are creases in the production process of the membrane, the longitudinal laying of the slope membrane can prevent the creases of the membrane from being stretched. Starting from the initial installation position, the water surface membrane is divided into the first water surface membrane, the second water surface membrane...the nth water surface membrane.
[0010] Furthermore, the float is fixed under the water surface membrane by welding, and the float is in direct contact with the sewage leachate.
[0011] Furthermore, the gravity pressure tube is fixed on the water surface membrane by a welded fixing belt. Installing the gravity pressure tube on the surface of the water surface membrane can increase the weight of the membrane surface and balance the buoyancy of the water surface membrane. It prevents the negative pressure caused by the strong wind in the valley blowing over the surface of the regulating pool, which adsorbs the water surface membrane and makes the water surface membrane safer. During the rainy season, the gravity pressure tube presses the membrane down to form a concave shape, which is convenient for collecting rainwater. When there is not much rain, it is helpful to avoid direct sunlight on the water surface membrane; when there is more rain, a small clean water pump can be used to pump water. At the same time, the gravity pressure tube can make the water surface membrane form a three-dimensional shape, effectively reducing the unevenness produced on the membrane surface, and is conducive to the centralized discharge of rainwater on the surface of the water surface membrane and the collection of gas under the membrane to the gas outlet through the surrounding gas collecting pipes.
[0012] Furthermore, it also includes a walkway board, which is arranged on the water surface membrane. The plurality of spaced walkway boards constitute a pedestrian passage.
[0013] Furthermore, it also includes a gas collecting pipe, which is arranged around the slope of the regulating tank and under the slope membrane. A slope cushion membrane is provided between the gas collecting pipe and the slope membrane. A slope cushion membrane is provided under the gas collecting pipe, one end of the slope cushion membrane is connected to the anti-seepage membrane at the bottom of the regulating tank, and the other end is anchored outside the regulating tank. The gas collecting pipe is fixed to the slope cushion membrane by a welded fixing belt. The gas collecting pipe is used to collect a large amount of biogas generated due to the collection of leachate. If it is not effectively discharged, it will cause the water surface membrane to form air pockets in local areas, causing safety hazards.
[0014] Furthermore, a patch film is added at the overlapped position of the slope film and the water surface film. Strengthening and sealing welding and patch reinforcement welding are performed at the T-shaped intersection of the water surface film and the slope film.
[0015] Furthermore, a cushion membrane is provided between the gravity pressure tube and the water surface membrane.
[0016] Furthermore, the gravity pressure pipe is filled with clean water sand, and both ends are closed with blind plates.
[0017] The technical solution of the present invention has the following technical effects: the covering and sealing are firm and durable, the on-site construction is convenient, the construction can be flexibly adjusted according to the on-site needs, and the construction efficiency is high. BRIEF DESCRIPTION OF THE DRAWINGS
[0018] Figure 1 A schematic diagram of a floating cover device for a landfill leachate regulating tank.
[0019] Figure 2 The correct laying direction of water surface membrane and slope membrane.
[0020] Figure 3 Wrong laying direction of water surface membrane and slope membrane.
[0021] Figure 4 Schematic diagram of the patch membrane.
[0022] In the figure: 1-membrane body, 2-float, 3-gas collecting pipe, 4-gravity pressure pipe, 5-walkway board, 6-inspection port, 7-rainwater collection well, 8-anchoring ditch, 9-slope, 10-water surface of regulating pool, 11-the first water surface membrane, 12-dotted line of the flip position of the first water surface membrane, 13-the I-1st slope membrane, 14-the I-2nd slope membrane, 15-the I-3rd slope membrane, 16-incorrectly laid slope membrane, 17-T-junction of the upper and lower membranes, 18-patch membrane. DETAILED DESCRIPTION
[0023] The present invention is further described in detail below in conjunction with specific implementations and drawings. However, this should not be understood as the scope of the above subject matter of the present invention being limited to the following implementations, and all technologies realized based on the content of the present invention belong to the scope of the present invention.
[0024] Example 1
[0025] A floating cover device for a landfill leachate regulating tank, the floating cover device comprises a membrane body 1, a float 2, and a gravity pressure pipe 4. The float 2 is arranged under the membrane body 1 and is in direct contact with the landfill leachate. The membrane body 1 covers the water surface 10 of the regulating tank, and the gravity pressure pipe 4 is arranged above the membrane body 1.
[0026] Furthermore, the membrane body 1 is a spliced membrane body.
[0027] Furthermore, the spliced membrane body includes a water surface membrane splicing body and a slope membrane splicing body. The water surface membrane is divided into the first water surface membrane 11, the second water surface membrane 12...the nth water surface membrane in sequence from the initial installation position, and the slope membrane connected to the first water surface membrane is divided into the first-1st slope membrane 13, the first-2nd slope membrane 14, the first-3rd slope membrane 15...the first water surface membrane in sequence. The water surface membrane splicing body is a whole body welded by n pieces of water surface membranes 11, 12..., the slope membrane splicing body is a whole body welded by n pieces of slope membranes 13, 14, 15..., the water surface membrane splicing body is closed and covered on the water surface 10 of the regulating pool, the slope membrane splicing body is closed and covered on the slope 9 of the regulating pool, one end of the slope membrane splicing body is anchored in the anchoring groove 8 outside the regulating pool, and the other end is connected to the water surface membrane splicing body. The side slope membranes 13, 14, 15 and the water surface membranes 11, 12 are cut according to the designed size; the water surface membranes 11, 12 are laid on the water surface 10 along the transverse direction of the membrane, and the side slope membranes 13, 14, 15 are laid on the side slope 9 of the regulating pool along the longitudinal direction of the membrane. Because there are creases in the production process of the membrane, the longitudinal laying of the side slope membranes 13, 14, 15 can prevent the creases of the membrane from being stretched.
[0028] The gravity pressure tube is filled with clean water sand, and both ends are closed with blind plates. The gravity pressure tube 4 is fixed on the water surface membrane by welding fixing belts. Installing the gravity pressure tube 4 on the surface of the water surface membrane can increase the weight of the membrane surface and balance the buoyancy of the water surface membrane. Prevent the negative pressure caused by the strong wind in the valley blowing over the surface of the regulating pool, which adsorbs the water surface membrane and makes the water surface membrane safer. During the rainy season, the gravity pressure tube presses the membrane down to form a concave shape, which is convenient for collecting rainwater. When there is not much rain, it is helpful to avoid direct sunlight on the water surface membrane; when there is more rain, a small clean water pump can be used to pump water. At the same time, the gravity pressure tube 4 can make the water surface membrane form a three-dimensional shape, effectively reducing the unevenness produced on the membrane surface, and is conducive to the centralized discharge of rainwater on the surface of the water surface membrane and the collection of gas under the membrane to the air guide outlet through the surrounding gas collecting pipes.
[0029] The walkway board 5 is arranged on the water surface membrane. The walkway boards at intervals form a pedestrian passage.
[0030] The gas collecting pipe 3 is arranged around the slope 9 of the regulating tank and under the slope membranes 13, 14, 15... A slope cushion membrane is arranged under the gas collecting pipe 3, one end of which is connected to the anti-seepage membrane at the bottom of the regulating tank, and the other end is anchored in the anchoring ditch 8 outside the regulating tank. The gas collecting pipe 3 is fixed on the slope cushion membrane by a welded fixing belt. The gas collecting pipe 3 is used to collect a large amount of biogas generated by the collection of leachate. If it is not effectively discharged, it will cause the water surface membrane to form air pockets in local areas, causing safety hazards.
[0031] A patch film is added at the overlapped position of the side slope film 13, 14, 15 ... and the water surface film 11, 12 .... A reinforcing and sealing patch film 18 is welded at the T-shaped intersection 17 of the water surface film 11, 12 ... and the side slope film 13, 14, 15 ...
[0032] A cushion membrane is provided between the gravity pressure tube 4 and the water surface membranes 11, 12, ...
[0033] The technical solution of the present invention has the advantages of firm and durable covering and sealing, convenience for on-site construction, flexible adjustment of construction according to on-site needs, and high construction efficiency.
[0034] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. This should not be understood as the scope of protection of the subject matter of the present invention being limited to the above implementation modes. Any modification, equivalent replacement, improvement, etc. made by a person of ordinary skill in the art within the spirit and principle of the present invention without inventiveness should be included in the scope of protection of the invention.
Claims
1. A floating cover device for a landfill leachate regulating tank, characterized in that: The floating cover device comprises a membrane body, a float, and a gravity pressure pipe, wherein the float is arranged under the membrane body and directly contacts with the landfill leachate, the membrane body covers the regulating tank, and the gravity pressure pipe is arranged above the membrane body; The membrane body is a spliced membrane body, which includes a water surface membrane splicing body and a slope membrane splicing body. The water surface membrane splicing body is formed as a whole by welding n pieces of water surface membranes, and the slope membrane splicing body is formed as a whole by welding n pieces of slope membranes. The water surface membrane splicing body is closed and covers the water surface of the regulating pool, and the slope membrane splicing body is closed and covers the slope of the regulating pool. One end of the slope membrane splicing body is anchored outside the regulating pool, and the other end is connected to the water surface membrane splicing body.
2. The floating cover device for a landfill leachate regulating tank according to claim 1, characterized in that: The water surface membrane is laid on the water surface along the transverse direction of the membrane, and the slope membrane is laid on the slope of the regulating tank along the longitudinal direction of the membrane.
3. The floating cover device for a landfill leachate regulating tank according to claim 2, characterized in that: A patch membrane is added at the T-shaped intersection where the slope membrane and the water surface membrane overlap.
4. The floating cover device for a landfill leachate regulating tank according to claim 1, characterized in that: The slope membrane splicing body is anchored outside the regulating tank through an anchoring groove.
5. The floating cover device for a landfill leachate regulating tank according to claim 1, characterized in that: The gravity pressure pipe is filled with clean water sand, and both ends are closed with blind plates.
6. The floating cover device for a landfill leachate regulating tank according to claim 1, characterized in that: The gravity pressure pipe is fixed on the water surface membrane by means of a welding fixing belt.
7. The floating cover device for a landfill leachate regulating tank according to claim 1, characterized in that: Also included is a walkway plate, which is arranged on the membrane body.
8. The floating cover device for a landfill leachate regulating tank according to claim 1, characterized in that: It also includes an air collecting pipe, which is arranged around the slope of the regulating tank and under the membrane body.