Method for treating sewage sludge and river sediment

Abstract

The invention provides a method for treating sewage sludge and river sediment, and relates to water treatment engineering and hydraulic engineering for treating river channels. According to the scheme, in the first aspect, the sewage sludge and river sediment treatment method comprises the following steps that sludge and sediment flowing in sewage and a river are intercepted, and the intercepted sludge and sediment are precipitated to a sewage discharging and sediment discharging channel on the lower side of the sewage and the river; on the second aspect, the sewage sludge and river sediment treatment system is characterized in that a conveying device is mounted in a sewage discharging and sediment discharging channel; the conveying device conveys the sludge and the sediment to one side along the length direction of the pollution discharge and sediment discharge channel; the conveying device can gradually lift sludge and silt out of a sewage and river system. According to the device, silt in a river can be cleaned for a long time, secondary utilization of the silt in the river is achieved, cost is saved, and economic benefits are improved. The device can also be used in sewage treatment and feed water treatment, and the sewage treatment capacity can be improved.

Description

Technical Field

[0001] The present invention relates to a water treatment project and a hydraulic project for regulating a river, and in particular to a method and system for regulating river sediment. Background Art

[0002] my country has over ten pumping stations on the Yellow River alone, pumping billions of cubic meters of water annually and irrigating tens of millions of mu (approximately 1,000 acres). The Jingdian High-Lift Pumping and Irrigation Project alone pumps over 400 million cubic meters of water annually, irrigating over one million mu (approximately 1,000 acres). Due to the high sediment content of river water—for example, the average sediment content at the Jingtai section of the Yellow River is 5.09 kg per cubic meter—this high sediment content not only severely wears out pumping equipment, especially pumps, but also significantly increases pumping costs and delivers large amounts of sediment to downstream reservoirs and farmland.

[0003] my country has many rivers with high sediment concentrations, such as the Yellow River and its many tributaries. Because these rivers flow through the Loess Plateau, where the climate is arid, vegetation is poor, and heavy rains occur in summer and autumn, severe soil erosion occurs. The engineering problems caused by silt accumulation in these rivers are significant. Despite the rapid advancements in water treatment technology worldwide, the problem of sediment concentration in major rivers remains largely unaddressed. Without effective measures to improve river management, sediment accumulation remains untreated, leading to continued deterioration of river channels. Summary of the Invention

[0004] The purpose of the present invention is to provide a method for treating sewage sludge and river sediment, which can clean the sediment in the river for a long time, realize the secondary utilization of the sediment in the river, save costs and improve economic benefits.

[0005] Another object of the present invention is to provide a river sediment management system that can clean the sediment in the river for a long time, realize the secondary utilization of the sediment in the river, save costs and improve economic benefits.

[0006] The embodiment of the present invention is achieved as follows: In the first aspect, an embodiment of the present application provides a method for river sediment management, comprising the following steps: intercepting sediment flowing in a river, and settling the intercepted sediment into a sediment discharge channel on the lower side of the river; transporting the settled sediment along the length of the sediment discharge channel to one side of the river; and finally transporting the deposited sediment out of the river system through a pre-installed conveyor belt, and then performing unified treatment.

[0007] Based on the first aspect, in an embodiment of the present invention, the step of intercepting the silt flowing in the river and settling the intercepted silt to the lower side of the river is as follows: an interception area is set along the width direction of the river to intercept the silt flowing through the interception area.

[0008] Based on the first aspect, in some embodiments of the present invention, the above-mentioned step of transporting the settled sediment to one side of the river along the length direction of the sediment discharge channel is as follows: a preset conveyor belt is installed in the sediment discharge channel, and the sediment will settle on the conveyor belt, and the conveyor belt transports the sediment to one side of the river.

[0009] Based on the first aspect, in an embodiment of the present invention, both sides of the sand discharge channel extend and rise in a direction away from the river, and the silt sediment is carried away from the river system by the conveyor belt.

[0010] On the second aspect, an embodiment of the present application provides a system for river sediment management, comprising: digging a sediment discharge channel under the river, with both sides of the sediment discharge channel extending away from the river and gradually rising; an interception net for intercepting sediment is installed in the river, and both sides of the interception net are connected to the side of the river; the sediment discharge channel is equipped with a conveyor belt for transporting settled sediment.

[0011] Based on the second aspect, in an embodiment of the present invention, the above-mentioned interception net is installed on a bracket.

[0012] Based on the second aspect, in an embodiment of the present invention, the above-mentioned intercepting net is fixed on the above-mentioned bracket, and the bracket spans above the sand discharge channel.

[0013] Based on the second aspect, in an embodiment of the present invention, the intercepting net is composed of textile material and metal mesh.

[0014] Based on the second aspect, in an embodiment of the present invention, the angle between the above-mentioned interception net and the water surface is determined by the size of the above-mentioned bracket and is generally not less than 40 degrees.

[0015] Based on the second aspect, in an embodiment of the present invention, a conveyor belt is installed in the sand discharge channel, and a transport vehicle and a track may also be configured.

[0016] Compared with the prior art, the embodiments of the present invention have at least the following advantages or beneficial effects: In the first aspect, an embodiment of the present application provides a method for river sediment control, comprising the following steps: intercepting sediment flowing in a river, and settling the intercepted sediment into a sediment discharge channel on the lower side of the river; transporting the settled sediment along the length of the sediment discharge channel to one side of the river; discharging the settled sediment from the river system; and finally, uniformly treating the discharged sediment.

[0017] In this embodiment, the staff can carry out long-term treatment of the silt in the river, and can discharge the intercepted silt in time, thereby avoiding the serious impact of silt accumulation in the river on the river. Furthermore, the staff can reuse the silt cleared from the river, saving costs and improving economic benefits.

[0018] Secondly, a system for river sediment management is provided, in which a sediment discharge channel is excavated under the river, with both sides of the channel extending and rising away from the river; an interception net for intercepting sediment is installed in the river, with both sides of the interception net connected to the side of the river; and a conveyor belt for transporting sediment is installed in the sediment discharge channel.

[0019] In this embodiment, the staff can carry out long-term treatment of the silt in the river, and can discharge the intercepted silt in time, thereby avoiding the serious impact of silt accumulation in the river on the river. Compared with traditional river sand mining operations, it reduces the damage to the environment, river channels, and the living environment of organisms in the basin.

[0020] Invention Point During sandstorms, locals typically wrap their heads with scarves to prevent direct damage to their skin, hair, ears, and other areas. This is common knowledge and evidence that textile materials have a dust-blocking effect. However, during experiments, the applicant discovered that, when the same textile material is wet, it exhibits better filtering performance.

[0021] Based on the first invention point, another characteristic of textile materials is that they are easy to cut and sew, and can be made into various shapes and huge sizes.

[0022] Based on the first aspect of the invention, it is known that the wet textile material can filter out fine suspended particles.

[0023] 2. The angle between the interception net and the water surface. Conventional water treatment technologies employ vertical and horizontal relationships, with the filter serving as an interception medium: located in the liquid flow path, forming a physical barrier. The applicant's design, which places the interception net at an angle to the liquid flow, fully utilizes basic physical principles.

[0024] Its theoretical basis is the force conditions of suspended particles in liquid.

[0025] When the interception net is perpendicular to the liquid flow direction, when suspended particles hit the interception net along with the liquid, they are subjected to an action force, a reaction force, and their own gravity. The action and reaction forces are in opposite directions and equal in magnitude. In theory, the suspended particles will simply sink, and during this sinking process, they are very likely to clog the interception net.

[0026] If the interception net has a 45-degree angle with the liquid flow, when the suspended particles hit the interception net with the liquid, they themselves are also subjected to an action force and a reaction force. The action force is perpendicular to the interception net, and the reaction force is divided into two components: a horizontal component and a vertical downward component. The horizontal component offsets the forward force of the suspended particles, and the vertical component plus its own gravity accelerates the sedimentation of the suspended particles.

[0027] Based on the two invention points and experimental proof, accelerating the sedimentation of suspended particles in liquid depends on the angle between the interception net and the liquid flow.

[0028] 3. Design of sewage and sediment discharge channels. In water treatment technology, the purpose of sewage discharge is to dispose of waste and prevent harmful accumulation within the system. Currently known sewage discharge methods include backwashing and manual drainage, both of which have disadvantages.

[0029] By using sewage and sand discharge channels and mechanical sewage discharge methods, accumulated sediments can be discharged without interrupting system operation. This is a very important condition for river sediment control. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following briefly introduces the drawings required for use in the embodiments. It should be understood that the following drawings only illustrate certain embodiments of the present invention and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other relevant drawings can be obtained based on these drawings without paying any creative work.

[0031] FIG1 is a schematic diagram of the system structure of a river sediment management system according to an embodiment of the present invention.

[0032] Markings in the figure: 1-river, 2-interception net, 3-river bank, 4-sand discharge channel, 5-conveyor belt, 6-inclined conveyor belt, 7-slope.

[0033] FIG2 is a schematic diagram of an installation mechanism of an interception net according to an embodiment of the present invention.

[0034] Markings in the figure: 8-support, 9-riverbed.

[0035] FIG3 is a schematic diagram of the interception net structure according to an embodiment of the present invention.

[0036] Markings in the figure: 10-hook, 11-metal mesh, 12-metal shaft. DETAILED DESCRIPTION

[0037] To make the objectives, technical solutions, and advantages of the embodiments of the present application more clear, the technical solutions in the embodiments of the present application will be clearly and completely described below in conjunction with the accompanying drawings of the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Generally, the components of the embodiments of the present application described and shown in the drawings herein can be arranged and designed in various different configurations.

[0038] Therefore, the following detailed description of the embodiments of the present application provided in the accompanying drawings is not intended to limit the scope of the present application for protection, but merely represents selected embodiments of the present application. All other embodiments obtained by persons of ordinary skill in the art based on the embodiments in the present application without creative work are within the scope of protection of the present application.

[0039] Example 1 Please refer to Figure 1. The present invention provides a method for river sediment management, comprising the following steps: intercepting sediment flowing in a river and settling the intercepted sediment into a sediment discharge channel at the lower side of the river; transporting the settled sediment along the length of the sediment discharge channel to one side of the river; transporting the settled sediment out of the river system via an inclined conveyor belt; and finally, uniformly treating the discharged sediment.

[0040] In the above embodiment, please refer to Figure 2 to intercept the silt flowing in the river and deposit the intercepted silt into a sediment discharge channel on the lower side of the river. Workers set up a bracket on the riverbed and fixed the bracket at a specific position on the riverbed. The interception net is fixed on the bracket to facilitate future replacement and maintenance. The interception net is facing the direction of the river flow to intercept the silt. The interception net is set along the width of the river. A sediment discharge channel is dug on the lower side of the river and the river and the sediment discharge channel are connected. The water in the river flows through the interception net and the silt in the water is intercepted and deposited into the sediment discharge channel. The settled sediment is transported to one side of the river along the length of the sediment discharge channel via the conveyor belt marked 5; the settled sediment is transported out of the river system via the inclined conveyor belt marked 6; and then the sediment is discharged into the sand clearing site for unified treatment. The above steps are repeated.

[0041] In the above implementation, the interception net is manufactured as follows: Refer to Figure 3. The interception net is composed of two metal meshes and a metal axis. The two metal meshes are of the same size and can be assembled around the axis marked 12. The two metal meshes can be opened and closed around the axis. When the two metal meshes are opened, textile materials of the same size can be hung on the hooks and covered on the metal meshes. When the two metal meshes are closed, the textile materials are fixed in place within the metal meshes, forming the interception net.

[0042] The use of metal mesh to fix textile materials takes advantage of the rigidity of the metal mesh and its easy fixation. During the sediment interception process, the interception mesh will be subjected to a small amount of river impact, and the interception mesh will not be deformed. The interception mesh composed of metal mesh and textile materials can not only achieve the purpose of clearing fine sediment in the river, but also achieve the effect of not deforming and failing, and it is low cost.

[0043] In this embodiment, the staff can carry out long-term treatment of the silt in the river, and can discharge the intercepted silt in time, thereby avoiding the serious impact of silt accumulation in the river on the river. Furthermore, the staff can reuse the silt cleared from the river, saving costs and improving economic benefits.

[0044] Based on the first aspect, in an embodiment of the present invention, the step of intercepting the silt flowing in the river and settling the intercepted silt to the lower side of the river is as follows: an interception area is set along the width direction of the river to intercept the silt flowing through the interception area.

[0045] In this embodiment, the interception area matches the width of the river, so that the sediment in the river can be intercepted in a larger range and the interception density is improved.

[0046] Based on the first aspect, in an embodiment of the present invention, the step of transporting the settled sediment to one side of the river along the length direction of the sediment discharge channel is as follows: a conveyor belt is installed in the sediment discharge channel to transport the sediment in the sediment discharge channel.

[0047] In this embodiment, the interception area in the river intercepts the sediment in real time. Due to the angle of the interception net, the intercepted sediment is accelerated to settle into the sediment discharge channel. The staff will determine the conveying speed of the conveyor belt according to the sediment content of the river, and transport the sediment in the sediment discharge channel to one side of the sediment discharge channel for discharge.

[0048] Based on the first aspect, in an embodiment of the present invention, the transported silt automatically falls into an inclined conveyor belt and is lifted out of the river system for secondary utilization. Example

[0049] Wastewater treatment is a relatively mature technology in water treatment. While treatment processes vary depending on the source of wastewater, the primary treatment process remains fundamentally the same. Primary treatment, or physical treatment, commonly involves gravity separation (e.g., sedimentation tanks and grit chambers); filtration (grids, screens, and sand filters); flotation (using bubbles to cause suspended solids to float upward); and centrifugation (centrifuges and hydrocyclones).

[0050] The embodiment of the present application provides a method for treating sewage sludge. Based on the suggestion of invention point 1, the interception net method can filter out very small particles in the sewage; because there is a metal mesh, the interception net can intercept large suspended objects. Based on the suggestion of invention point 2, the present application can achieve the purpose of conventional physical treatment with a smaller footprint and lower electricity cost. Based on the suggestion of invention point 3, the present application can discharge the sludge from the sewage treatment system without interrupting the physical treatment during the physical treatment of sewage.

[0051] In order to more clearly illustrate the advantages of a method for treating sewage sludge and river sediment, a sewage treatment process flow chart is taken as an example. The flow chart is as follows: Sewage raw water - screen - sedimentation tank - primary sedimentation tank - biological treatment equipment - secondary sedimentation tank - discharge after disinfection; there is also a route from biological treatment equipment - sludge concentration - sludge digester - sludge dewatering - sludge utilization.

[0052] As can be seen from the flow chart, the screen, grit chamber, primary sedimentation tank, and secondary sedimentation tank can all be replaced by this application. Moreover, grit chamber, primary sedimentation tank, and secondary sedimentation tank are equipment that occupy a large area in sewage treatment.

[0053] An interception net and a sewage discharge channel are set up at a waterway where the raw sewage water enters; the interception net is selected at a suitable angle according to the properties of the raw sewage water to intercept the dirt and suspended particles contained in the sewage; a conveying device is set up in the sewage discharge channel, and the sludge is accelerated to settle on the conveying device and then taken out of the sewage raw water system; the contact surfaces between the interception net and the two sides and bottom of the sewage channel must be sealed to ensure that the sewage can only enter the next step of treatment through the interception net; the sewage treated by the interception net can directly enter the biological treatment equipment; the discharged sludge enters the sludge dewatering, thereby ensuring the stable operation of the system.

[0054] During the above implementation process, since the runoff volume of sewage treatment is very small compared with that of rivers, the design of the interception net is also based on the main design conditions of easy replacement and better interception effect.

[0055] River management prioritizes environmental protection and preserving the balance of the ecosystem, so sealing the interception net from the riverbed and banks is not an issue. However, sewage treatment differs, as separate treatment systems exist before and after the interception net. This requires sealing to prevent untreated sewage from seeping into subsequent treatment processes, reducing treatment efficiency.

[0056] The discharged sludge can enter the sludge dewatering process to ensure that the sewage treatment system does not accumulate too much sludge.

[0057] A method for treating sewage sludge and river sediment can be applied not only to sewage treatment, water supply treatment and water purification treatment related processes, but also to river sediment treatment, changing the river sand mining operation mode, and has great application prospects.

[0058] The above description is merely a preferred embodiment of the present application and is not intended to limit the present application. Various modifications and variations are possible for those skilled in the art. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of the present application shall be included within the scope of protection of the present application.

[0059] It will be apparent to those skilled in the art that the present application is not limited to the details of the exemplary embodiments described above and that the present application can be implemented in other specific forms without departing from the spirit or essential characteristics of the present application. Therefore, the embodiments should be considered in all respects as illustrative and non-restrictive, and the scope of the present application is defined by the appended claims, not the foregoing description, and all variations within the meaning and range of equivalents of the claims are intended to be included therein. Any reference sign in a claim should not be construed as limiting the claim to which it relates.

Claims

1. A method for treating sewage sludge and river sediment, characterized in that: The following steps are involved: Intercepting sludge and sediment flowing in sewage and rivers, and transferring the intercepted sludge and sediment sediments to the sewage and sediment discharge channels below the sewage and rivers; The transferred sediment is transported out of the sewage and river system along the length direction of the sewage and sand discharge channel.

2. The method for treating sewage sludge and river sediment according to claim 1, characterized in that: The step of intercepting sewage, sludge and sediment flowing in the river and transferring the intercepted sediment to the lower side of the sewage and river: An interception area is set along the width direction of the sewage and the river to intercept the sludge and sediment flowing through the interception area.

3. The method for treating sewage sludge and river sediment according to claim 1, characterized in that: The step of transporting the transferred sediment out of the sewage and river along the length direction of the sewage and sand discharge channel: A preset conveyor belt is installed in the sewage and sand discharge channels to transport the sediment in the sewage and sand discharge channels.

4. The method for treating sewage sludge and river sediment according to claim 3, characterized in that: The sediment in the sewage and sand discharge channels is transported out of the sewage and river systems.

5. A system for treating sewage sludge and river sediment, characterized in that: include: Digging a sewage and sediment discharge channel under the sewage or river, with both sides of the sewage and sediment discharge channel extending and rising in a direction away from the sewage or river, and finally exposing the liquid surface of the sewage or river; An interception net for intercepting sludge and sediment is installed in the sewage and river, and both sides of the interception net are connected to the sides of the sewage and river.

6. The system for treating sewage sludge and river sediment according to claim 5, characterized in that: The angle between the intercepting net and the water surface is not less than 40°.

7. A sewage sludge and river sediment treatment system according to claim 5 or 6, characterized in that: The materials of the interception net include textile materials, metal mesh and the like.

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