Comprehensive sludge discharge tank and waterworks sludge concentration system
By designing an integrated sludge discharge tank, combined with baffles and a transmission thickener, the efficient concentration and purification of sludge from the waterworks was achieved, solving the problems of large footprint and high construction costs, and improving the flexibility of sludge treatment and the quality of effluent.
Patent Information
- Application Number
- CN202520351872.6
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-03-03
- Publication Date
- 2026-02-27
- Estimated Expiration
- 2035-03-03
AI Technical Summary
In existing technologies, water treatment projects for sludge discharge from waterworks occupy a large area, have high construction costs, and cannot cope with fluctuations in the amount and quality of incoming water, resulting in substandard effluent quality.
An integrated sludge discharge tank was designed, comprising a tank body, a central cylinder, an inlet pipe, a baffle plate, and a transmission thickener. The baffle plate and transmission thickener enable integrated sludge thickening and purification. Multiple outlet pipes and control valves allow for flexible adjustment, reducing the footprint and construction costs.
It achieves homogeneous and uniform regulation of sludge discharge water, reduces land area and construction costs, can flexibly adjust treatment according to changes in inflow water volume, ensures effluent quality, and improves water treatment efficiency and sludge water classification and treatment effect.
Smart Images
Figure CN223950904U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model belongs to the environmental pollution prevention equipment technical field, concretely relates to a comprehensive sludge lagoon and waterworks sludge concentration system. BACKGROUND
[0002] At present, when the waterworks taking surface water as water source is carrying out water purification, a large amount of production wastewater will be formed in the sedimentation tank and filter tank, and the filter tank backwash wastewater and the sedimentation tank discharge wastewater can be collectively called as "sludge discharge water". The sludge discharge water contains many pollutants, and according to research data, the total solid content of the sludge discharge water generated by the aluminum salt flocculation in the water purification process is between 1000~17000 mg / L, wherein the total suspended solid accounts for 75%~90%, and the volatile total solid accounts for 20%~35%. If the sludge discharge water is not properly treated and is discharged into rivers, lakes and seas at will, water pollution will be caused; at the same time, due to the high solid content in the sludge discharge water, sludge will be produced by discharging the sludge discharge water, and the riverbed will be raised, which not only affects the ecological environment, but also brings serious adverse effects on the flood drainage capacity of river navigation.
[0003] In the prior art, the filter tank backwash wastewater cannot meet the reuse requirements, and the separate concentration of the filter tank backwash wastewater cannot meet the dewatering mechanical requirements, so the filter tank backwash wastewater can only be mixed and concentrated with the sedimentation tank discharge wastewater, as shown in the prior art, the sludge discharge water formed by the sedimentation tank discharge wastewater and the filter tank backwash wastewater is usually mixed in the adjusting tank, and then the supernatant in the adjusting tank is reused or discharged, and the bottom sludge water in the adjusting tank is concentrated and dewatered. Figure 1
[0004] However, in the use of the above prior art, the inventors found that at least the following problems exist in the prior art:
[0005] During the operation of the waterworks, the discharge of the sludge discharge water is generally intermittent (not continuous), so that the sludge discharge water volume of the waterworks fluctuates greatly, and the conventional adjusting tank usually discharges water through the overflow weir at the periphery top, in order to ensure that the residence time of the sludge discharge water in the adjusting tank reaches the predetermined time, a larger adjusting tank is often needed to be set to cope with the water volume impact, which greatly increases the land occupation of the sludge discharge water treatment project and increases the construction cost; in addition, when the sludge discharge water volume surges, the existing adjusting tank cannot withstand the water volume impact, which will cause the problems of water overflow or substandard water quality. CONTENT OF THE UTILITY MODEL
[0006] In order to at least solve the above technical problems to some extent, the utility model provides a comprehensive sludge lagoon and waterworks sludge concentration system.
[0007] In order to achieve the above purpose, the utility model adopts the following technical solutions:
[0008] The utility model discloses a kind of comprehensive sludge discharge ponds, including tank body and with the bottom of the tank body is connected with sludge discharge hopper, the bottom of the sludge discharge hopper is provided with sludge discharge port;Center cylinder, water inlet pipe, baffle and transmission thickener are provided in the tank body, the center cylinder is vertically arranged in the middle of the tank body, the water inlet pipe is communicated with the center cylinder after passing through the tank body, the baffle and the transmission thickener are sequentially arranged below the center cylinder;Multiple supernatant water outlets are sequentially provided from top to bottom on the tank body, multiple supernatant water outlets are all communicated with water outlet pipe, and multiple water outlet pipes are all cooperatively provided with control valve.
[0009] In a possible design, multiple water collecting pipes corresponding to multiple supernatant water outlets are sequentially arranged in the tank body from top to bottom, each water collecting pipe is circumferentially arranged on the inner wall of the tank body along the horizontal direction, multiple water collecting holes are spaced apart at the bottom of each water collecting pipe, multiple exhaust holes are spaced apart at the top of each water collecting pipe, and a drain hole is formed in the pipe wall of each water collecting pipe, and each water collecting pipe is communicated with the water inlet of the corresponding water outlet pipe through the drain hole.
[0010] In a possible design, each water collecting pipe is made of PPT material.
[0011] In a possible design, among multiple water collecting pipes, when the height of any water collecting pipe is greater than that of another water collecting pipe, the number of water collecting holes of the any water collecting pipe is greater than that of the another water collecting pipe.
[0012] In a possible design, the inner diameter of the lower part of the center cylinder gradually increases from top to bottom.
[0013] The second aspect discloses a sludge concentration system for waterworks, which comprises the comprehensive sludge discharge pond according to any one of the above.
[0014] In a possible design, the sludge concentration system for waterworks further comprises a reused water pool, a sludge concentration pool and a sludge dewatering machine, the supernatant water outlet of the comprehensive sludge discharge pond is communicated with the water inlet of the reused water pool, the sludge discharge port of the comprehensive sludge discharge pond is communicated with the water inlet of the sludge concentration pool, and the water outlet of the sludge concentration pool is communicated with the water inlet of the sludge dewatering machine.
[0015] In a possible design, the sludge concentration system for waterworks further comprises a lifting pump station, the water inlets of the lifting pump station are communicated with the water outlets of the sedimentation pool and the filter pool respectively, and the water outlet of the lifting pump station is communicated with the water inlet of the water inlet pipe in the comprehensive sludge discharge pond.
[0016] In a possible design, the water outlet of the lifting pump station, the sludge discharge port of the comprehensive sludge discharge tank and / or the water outlet of the recycled water tank are connected with pumps.
[0017] In a possible design, the sludge dewatering machine is a stacked screw dewatering machine.
[0018] The beneficial effects of the present application are as follows:
[0019] 1) The comprehensive sludge discharge tank can reduce the land occupation and construction cost of sludge water treatment project, and can flexibly adjust and treat according to the inflow of sludge water, so as to ensure that the effluent meets the requirements. In the implementation process of the present application, the sludge water is collected into the center cylinder through the water inlet pipe, and is distributed from the lower part of the center cylinder to the periphery of the tank body under the action of the baffle; then, the sludge is accelerated for concentration by the transmission thickener to separate the supernatant, which can be discharged through the supernatant outlet provided on the tank body, and the control valve of one or more water outlets can be used to control the drainage according to the different inflow of sludge water, and the sludge water at the bottom of the tank body can be discharged through the sludge discharge port opened at the bottom of the sludge discharge hopper. The comprehensive sludge discharge tank in the present application can realize the homogeneous and equal adjustment of sludge water, and organically integrate the two processes of sludge water concentration treatment and purification treatment, and has the functions of adjustment, concentration and sludge water classification, which is beneficial to reduce the land occupation and construction cost of sludge water treatment project; in addition, by providing a plurality of water outlets and corresponding control valves, the present application can flexibly adjust and treat according to the inflow of sludge water, so as to fully cope with the changes of inflow and water quality, and ensure that the effluent meets the requirements.
[0020] 2) The sludge concentration system of the waterworks can realize the recycling and utilization of the supernatant in the comprehensive sludge discharge tank, improve the water treatment quality, and realize the further treatment of sludge water. BRIEF DESCRIPTION OF DRAWINGS
[0021] Figure 1 is a schematic diagram of the sludge water treatment process in the prior art;
[0022] Figure 2 is a schematic diagram of the structure of the comprehensive sludge discharge tank in embodiment 1;
[0023] Figure 3 is Figure 2 A-A direction of the schematic diagram of;
[0024] Figure 4 is Figure 2 B-B direction of the schematic diagram of;
[0025] Figure 5 is a schematic diagram of the structure of the sludge concentration system of the waterworks in embodiment 2. Detailed Implementation
[0026] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the present utility model will be briefly introduced below in conjunction with the accompanying drawings and descriptions of the embodiments or the prior art. Obviously, the following description of the structure of the accompanying drawings is only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort. It should be noted that the description of these embodiments is used to help understand this utility model, but does not constitute a limitation on this utility model.
[0027] Example 1:
[0028] like Figures 2 to 4 As shown, this embodiment provides a comprehensive sludge discharge tank, including a tank body 1 and a sludge discharge hopper 2 connected to the bottom of the tank body 1. The bottom of the sludge discharge hopper 2 has a sludge discharge port. The tank body 1 contains a central cylinder 3, an inlet pipe 4, a baffle plate 5, and a transmission thickener 6. The central cylinder 3 is vertically positioned in the middle of the tank body 1. The inlet pipe 4 passes through the tank body 1 and communicates with the central cylinder 3. The baffle plate 5 and the transmission thickener 6 are sequentially arranged below the central cylinder 3, i.e., the central cylinder 3, the baffle plate 5, and the transmission thickener 6 are arranged from top to bottom within the tank body 1. Multiple supernatant outlets are sequentially opened from top to bottom on the tank body 1, and each of the multiple supernatant outlets is connected to an outlet pipe 7, and each of the multiple outlet pipes 7 is equipped with a control valve. As an example, in this embodiment, the number of supernatant outlets on the tank body 1 is set to 4. Of course, it can also be set to 3 or 5, etc., and is not limited here. It should be understood that, for the purpose of facilitating unified drainage, in this embodiment, multiple water outlet pipes are connected through a main drainage pipe.
[0029] It should be noted that in this embodiment, the baffle plate 5 is used to change the direction of water flow from the central cylinder 3 to avoid the incoming water from impacting the bottom of the pool, ensuring that the mud and water are fully mixed and settled. At the same time, it can slow down the water flow rate in the tank 1, making the sludge settle more easily, thereby improving the mud-water separation effect.
[0030] In this embodiment, the control valve is a solenoid valve, and a flow meter is installed inside the tank 1 so as to remotely control the control valve based on the incoming water flow, thereby maximizing automated operation and reducing manual input.
[0031] In the embodiment, the transmission thickener 6 can help the solid particles in the sludge water in the tank 1 to settle down and separate supernatant by slowly rotating the stirring device, while stirring the sludge to avoid its accumulation and hardening at the bottom of the tank, ensuring the uniform distribution of the sludge and the fluidity of the sludge in the tank 1. In the implementation process, part of the coagulant can be added in the tank 1 to strengthen the precipitation effect.
[0032] In the embodiment, the sludge discharge pipe 9 is connected to the sludge discharge port to realize the discharge of sludge water.
[0033] It should be understood that the tank 1 is also provided with an access hole 10 and a walkway plate 11 to realize subsequent maintenance work; in addition, the tank 1 can be further provided with a reserved water outlet 12 and a vent overflow port, and the vent overflow port can be further connected to an overflow pipe 13 to cope with emergency conditions.
[0034] Specifically, in the embodiment, the integrated sludge discharge tank has an integrated structure, and the size is set to φ16m×6m, the thickness is 8mm, and the effective volume is 1100m 3 .
[0035] For example, when the water inflow is small, such as the hourly flow being less than 100m 3 / h, only the control valve matched with the lowermost water outlet pipe 7 can be opened for water discharge; when the water inflow increases, such as increasing to 100-500m 3 / h, the control valve matched with the second or upper water outlet pipe 7 can be opened according to the actual situation to ensure the water discharge effect; when the water inflow increases from 100m 3 / h to 600m 3 / h or more, the conventional process cannot withstand such water inflow, which will either cause water overflow or cause the water quality to be substandard, but the embodiment can preferentially play the function of water inflow and water quality adjustment, and further separate the water inflow by opening the control valve matched with all the water outlet pipes 7.
[0036] The comprehensive sludge discharge tank in the embodiment can facilitate reducing the land occupation and construction cost of the sludge water treatment project, and can flexibly adjust and treat according to the inflow of sludge water, thereby ensuring that the effluent meets the requirements. In the implementation process of the embodiment, the sludge water is collected into the center cylinder 3 through the water inlet pipe 4, and is distributed to the periphery of the tank body 1 from the lower part of the center cylinder 3 under the action of the baffle 5; then, the sludge is accelerated for concentration by the transmission thickener 6 to separate the supernatant, the supernatant can be discharged through the supernatant outlet of the tank body 1, and the inflow of sludge water can be controlled by one or more water outlet pipes 7 and the control valves arranged in cooperation. The sludge water at the bottom of the tank body 1 can be discharged through the sludge discharge port formed at the bottom of the sludge discharge hopper 2. The comprehensive sludge discharge tank in the embodiment can realize homogeneous and equal adjustment of sludge water, and organically integrate the two processes of sludge water concentration and purification, and has the functions of adjustment, concentration and sludge water classification, which facilitates reducing the land occupation and construction cost of the sludge water treatment project. In addition, by arranging multiple water outlet pipes 7 and corresponding control valves, the embodiment can flexibly adjust and treat according to the inflow of sludge water, thereby fully responding to the changes of inflow and water quality, and ensuring that the effluent meets the requirements.
[0037] In the embodiment, a plurality of water collecting pipes 8 corresponding to the supernatant outlets are arranged in the tank body 1 from top to bottom, each water collecting pipe 8 is arranged around the inner wall of the tank body 1 in the horizontal direction, a plurality of water collecting holes are formed at the bottom of each water collecting pipe 8, a plurality of exhaust holes are formed at the top of each water collecting pipe 8, a plurality of water discharge holes are formed in the wall of each water collecting pipe 8, and each water collecting pipe 8 is in communication with the water inlet of the corresponding water outlet pipe 7 through the water discharge hole. Specifically, in the embodiment, each water collecting pipe 8 is arranged as an annular pipe, and the annular pipe is fixed to the inner wall of the tank body 1 by angle steel supports and hoops.
[0038] In the embodiment, the supernatant outlets and the corresponding water collecting pipes 8 are arranged at different heights of the tank body 1, and the water collecting pipes 8 are arranged in a ring shape, and the water is discharged through the water collecting holes formed at the bottom of the water collecting pipes 8, which can prevent short flow and ensure that the supernatant is stably discharged from the comprehensive sludge discharge tank.
[0039] In the embodiment, each water collecting pipe 8 is made of PPT (polyacrylate) material. It should be noted that the PPT material has a certain ductility and can meet certain arc requirements.
[0040] In this embodiment, among the multiple water collection pipes 8, when the height of any water collection pipe 8 is greater than the height of another water collection pipe 8, the number of water collection holes in any water collection pipe 8 is greater than the number of water collection holes in the other water collection pipe 8. In this embodiment, when the diameter of the water collection holes is the same, the number of water collection holes opened at the bottom of any water collection pipe 8 is related to its height, and when the height of any water collection pipe 8 is higher, the number of water collection holes opened at its bottom is set to a larger value. The specific number depends on parameters such as the height of any water collection pipe 8 and is not limited here. It should be noted that when the inflow of sludge discharge water is large, the lower the height of the supernatant in the tank 1, the greater the corresponding water pressure. Therefore, by setting the number of water collection holes in the lower water collection pipe 8 to a smaller value and setting the number of water collection holes in the upper water collection pipe 8 to a larger value, it is beneficial to ensure that the inflow velocity of the multiple water collection pipes 8 is relatively balanced and to avoid large fluctuations in the water flow in the tank 1.
[0041] In this embodiment, the inner diameter of the lower part of the central cylinder 3 gradually increases from top to bottom, that is, the lower part of the central cylinder 3 is set as an outwardly flared horn structure, which can achieve the function of guiding the discharge water.
[0042] Example 2:
[0043] like Figure 5 As shown, this embodiment provides a sludge thickening system for a waterworks, including a comprehensive sludge discharge tank as described in any of Embodiment 1. It should be understood that the inlet of the inlet pipe 4 in the comprehensive sludge discharge tank is connected to the outlet of the sedimentation tank and the outlet of the filter tank, respectively. Specifically, in this embodiment, the sludge discharge water from the sedimentation tank and the backwash water from the filter tank are discharged into an open drainage channel, and then the sludge discharge water, which is a mixture of the sedimentation tank sludge discharge water and the filter backwash water, is transported to the comprehensive sludge discharge tank for adjustment and treatment via the open drainage channel.
[0044] In this embodiment, the waterworks sludge thickening system further includes a reclaimed water tank, a sludge thickening tank, and a sludge dewatering machine. The supernatant outlet of the integrated sludge discharge tank is connected to the inlet of the reclaimed water tank, the sludge discharge outlet of the integrated sludge discharge tank is connected to the inlet of the sludge thickening tank, and the outlet of the sludge thickening tank is connected to the inlet of the sludge dewatering machine.
[0045] Specifically, in this embodiment, the sludge thickening tank can be a sludge balancing tank or a gravity thickening tank to reduce the sludge volume and facilitate subsequent sludge treatment. The sludge balancing tank is mainly used to regulate the sludge flow rate and concentration to ensure stable operation of subsequent treatment equipment, while the gravity thickening tank uses gravity to cause solids in the sludge to settle, separating the supernatant and thus achieving sludge thickening.
[0046] In the embodiment, the waterworks sludge concentration system further comprises a lifting pump station, water inlets of the lifting pump station are respectively in communication with water outlets of the sedimentation tank and the filter tank, and a water outlet of the lifting pump station is in communication with a water inlet of the water inlet pipe 4 in the comprehensive sludge discharge tank. It should be noted that the lifting pump station can lift the sludge water located at a low position to the comprehensive sludge discharge tank, and is suitable for the case that the sludge water is located at a low position.
[0047] In the embodiment, a pump is connected to the water outlet of the lifting pump station, the sludge discharge port of the comprehensive sludge discharge tank, and / or the water outlet of the reuse water tank. That is, the lifting pump station and the comprehensive sludge discharge tank, the sludge discharge hopper 2 in the comprehensive sludge discharge tank and the sludge concentration tank, and / or the reuse water tank and the water reuse end in the waterworks are connected by pumps.
[0048] In the embodiment, the sludge dewatering machine is a stacked screw dewatering machine. It should be noted that in the embodiment, the sludge dewatering machine can also be a plate and frame dewatering machine or a belt dewatering machine. Compared with other dewatering machines, the stacked screw dewatering machine has the advantages of compact structure, continuous operation, high automation, high dewatering efficiency, low energy consumption, and easy maintenance, which is beneficial to further reducing the land occupation of the sludge water treatment project.
[0049] The waterworks sludge concentration system in the embodiment can realize the recycling and utilization of the supernatant in the comprehensive sludge discharge tank, improve the water treatment quality, and further treat the sludge water. Specifically, in the implementation process of the embodiment, the existing sedimentation tank discharge wastewater and filter tank backwash wastewater in the waterworks plant area enter the lifting pump station and are lifted to the comprehensive sludge discharge tank by the lifting pump station; then, the homogeneous and uniform adjustment is performed by the comprehensive sludge discharge tank, the supernatant in the mixed sludge water is discharged to the reuse water tank through the supernatant water outlet of the comprehensive sludge discharge tank, and can be further reused to the plant by pressurization, the bottom sludge water in the comprehensive sludge discharge tank can be lifted to the sludge concentration tank by a pump for concentration treatment, the mixed sludge water in the sludge concentration tank can be lifted to the sludge dewatering machine by a screw pump for treatment, the mud cake is dewatered to 80% and then transported out for treatment, and the filtrate can be further discharged to the sewage collection tank and then returned to the lifting pump station. Based on this, the waterworks sludge concentration system in the embodiment can well realize the concentration and purification of the sludge water.
[0050] As an example, the sludge water treatment scale of the waterworks sludge concentration system in the embodiment is 7500 m 3 / d (hourly flow rate is 312.5 m 3 / h), and the reuse water amount is about 6000-7000 m 3 / d, the water turbidity of the sludge discharge water lifting pump pit is less than or equal to 2000 NTU, the water turbidity of the comprehensive sludge discharge pool is less than or equal to 50 NTU (when the water turbidity of the 2m low liquid level is less than or equal to 50 NTU, the turbidity of the recycled water pool is used as the standard), the absolute dry sludge quantity treated per day is greater than or equal to 5 tons / day, and the moisture content of the dewatered sludge is less than or equal to 80%.
[0051] Finally, it should be noted that the above only for the preferred embodiments of the present application, and is not intended to limit the scope of the present application. Any modification, equivalent replacement, improvement, etc. within the spirit and principles of the present application, should be included in the scope of protection of the present application.
Claims
1. A comprehensive sludge discharge tank, characterized in that: The tank includes a tank body (1) and a sludge discharge hopper (2) connected to the bottom of the tank body (1). The bottom of the sludge discharge hopper (2) is provided with a sludge discharge port. The tank body (1) is provided with a central cylinder (3), a water inlet pipe (4), a baffle plate (5), and a transmission thickener (6). The central cylinder (3) is arranged vertically in the middle of the tank body (1). The water inlet pipe (4) passes through the tank body (1) and is connected to the central cylinder (3). The baffle plate (5) and the transmission thickener (6) are arranged below the central cylinder (3). The tank body (1) is provided with multiple supernatant outlets from top to bottom. Each of the multiple supernatant outlets is connected to a water outlet pipe (7), and each of the multiple water outlet pipes (7) is equipped with a control valve.
2. The integrated sludge discharge tank according to claim 1, characterized in that: The tank (1) is also provided with multiple water collection pipes (8) arranged from top to bottom, each corresponding to a multiple supernatant outlet. Each water collection pipe (8) is arranged around the inner wall of the tank (1) in a horizontal direction. Each water collection pipe (8) has multiple water collection holes spaced apart at its bottom and multiple vent holes spaced apart at its top. Each water collection pipe (8) has a drain hole on its wall and each water collection pipe (8) is connected to the inlet of the corresponding outlet pipe (7) through its drain hole.
3. The integrated sludge discharge tank according to claim 2, characterized in that: All water collection pipes (8) are made of PPT material.
4. The integrated sludge discharge tank according to claim 2, characterized in that: In a plurality of water collection pipes (8), when the height of any water collection pipe (8) is greater than the height of another water collection pipe (8), the number of water collection holes of the any water collection pipe (8) is greater than the number of water collection holes of the other water collection pipe (8).
5. The integrated sludge discharge tank according to claim 1, characterized in that: The inner diameter of the lower part of the central cylinder (3) gradually increases from top to bottom.
6. A sludge thickening system for a waterworks, characterized in that: Includes the integrated sludge discharge tank as described in any one of claims 1 to 5.
7. A sludge thickening system for a waterworks according to claim 6, characterized in that: The waterworks sludge thickening system also includes a reclaimed water tank, a sludge thickening tank, and a sludge dewatering machine. The supernatant outlet of the integrated sludge discharge tank is connected to the inlet of the reclaimed water tank, the sludge discharge outlet of the integrated sludge discharge tank is connected to the inlet of the sludge thickening tank, and the outlet of the sludge thickening tank is connected to the inlet of the sludge dewatering machine.
8. A sludge thickening system for a waterworks according to claim 7, characterized in that: The sludge thickening system of the waterworks also includes a booster pump station. The inlet of the booster pump station is connected to the outlet of the sedimentation tank and the outlet of the filter tank, respectively. The outlet of the booster pump station is connected to the inlet of the inlet pipe (4) in the integrated sludge discharge tank.
9. A sludge thickening system for a waterworks according to claim 8, characterized in that: Pumps are connected to the outlet of the booster pump station, the sludge discharge outlet of the integrated sludge discharge tank, and / or the outlet of the recycled water tank.
10. A sludge thickening system for a waterworks according to claim 7, characterized in that: The sludge dewatering machine is a screw press dewatering machine.