Anaerobic sludge treatment and recovery system
By combining the use of equipment such as anaerobic reactors, sludge separation tanks, centrifuges and medium carriers, efficient sludge recovery is achieved, the problem of sludge loss is solved, and the sewage treatment effect is improved.
Patent Information
- Application Number
- CN202422012500.9
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-08-19
- Publication Date
- 2025-07-11
- Estimated Expiration
- 2034-08-19
AI Technical Summary
The existing sludge separation tanks do not fully recover sludge, resulting in some sludge loss and affecting the sewage treatment effect.
A combined system of anaerobic reactor, sludge separation tank, centrifuge, sludge pool and sludge recovery pump is adopted to perform secondary liquid-solid separation through centrifuge, combining medium carrier and precipitator to promote sludge settlement and recovery.
It improves the recovery rate of sludge, reduces the possibility of particulate sludge loss, and enhances the sewage treatment effect.
Smart Images
Figure CN223087714U_ABST
Abstract
Description
Technical Field
[0001] This application belongs to the technical field of sludge recovery, and particularly relates to an anaerobic sludge treatment and recovery system. Background Art
[0002] The method of producing fuel ethanol by fermenting the tail gas of the metallurgical industry is a relatively environmentally friendly process for preparing fuel ethanol. During the process of producing fuel ethanol by the method of fermenting the tail gas of the metallurgical industry, wastewater containing ethanol and protein powder that can be purified is generated. The sewage flowing out after the wastewater is purified needs to enter the sludge treatment system for treatment before being discharged.
[0003] Currently, the sewage is treated successively by an anaerobic reactor and a sludge separation tank in the sludge treatment system, and the sludge is recycled. Part of the sludge will re-enter the anaerobic reactor for recovery treatment. However, the sludge separation tank is not sufficient in sludge recovery, and there is still a part of the sludge that will be lost, and the sludge recovery effect is not ideal. Summary of the Utility Model
[0004] This application aims to at least solve to some extent the technical problem that the anaerobic sludge recovery effect is not ideal. For this purpose, this application provides an anaerobic sludge treatment and recovery system.
[0005] An embodiment of this application provides an anaerobic sludge treatment and recovery system, including:
[0006] An anaerobic reactor;
[0007] A sludge separation tank, the tank opening of which is communicated with the water outlet of the anaerobic reactor;
[0008] A centrifuge, the feed inlet of which is communicated with the bottom of the sludge separation tank;
[0009] A sludge tank, the sludge tank communicates the slag discharge port of the centrifuge with the tank opening, and the bottom of the sludge tank is communicated with the circulation pump inlet of the anaerobic reactor;
[0010] A sludge recovery pump, which is arranged between the bottom of the sludge tank and the circulation pump inlet of the anaerobic reactor and communicates the sludge tank with the circulation pump inlet.
[0011] In some embodiments, the anaerobic sludge treatment and recovery system further includes:
[0012] A medium carrier, which is provided with an output end for outputting the medium and is communicated to the bottom of the sludge tank.
[0013] In some embodiments, the medium carrier is an inert gas carrier.
[0014] In some embodiments, the anaerobic sludge treatment and recovery system further includes:
[0015] A settler, located within the sludge separation tank, and the light-phase outlet of the settler faces the mouth of the sludge separation tank.
[0016] In some embodiments, at least two of the settlers are arranged side by side within the sludge separation tank.
[0017] In some embodiments, the settler is provided with a plurality of blocking members distributed around the light-phase outlet, and a groove is formed between two adjacent blocking members.
[0018] In some embodiments, the blocking members are triangular, and the plurality of blocking members are connected end to end in sequence to surround the light-phase outlet.
[0019] In some embodiments, the centrifuge is a horizontal screw centrifuge.
[0020] In some embodiments, the anaerobic sludge treatment and recovery system further includes:
[0021] An OA tank communicated with the liquid discharge port of the centrifuge.
[0022] In some embodiments, the sludge tank is provided with a thermometer and a pH meter.
[0023] Beneficial effects provided by one or more embodiments of the present application:
[0024] In the anaerobic sludge treatment and recovery system, the anaerobic reactor can treat sewage. The sewage that has been preliminarily treated still contains a certain concentration of COD and ammonia nitrogen. The sewage carrying sludge enters the sludge separation tank from the water outlet of the anaerobic reactor. Flocculent sludge with a larger mass and some granular sludge can settle at the bottom of the sludge separation tank. Some granular sludge with a relatively light mass may be located at the liquid level near the mouth of the sludge separation tank and is not easy to settle. For some granular sludge with a lighter mass, it can enter the centrifuge whose feed port is communicated with the bottom of the sludge separation tank, and secondary liquid-solid separation is carried out in the centrifuge. The sludge more concentratedly enters the sludge tank from the slag discharge port of the centrifuge. At the same time, the flocculent sludge with a larger mass and some granular sludge in the sludge separation tank can also enter the sludge tank communicated with the mouth of the sludge separation tank, enabling the simultaneous centralized recovery of flocculent sludge and granular sludge and reducing the possibility of granular sludge loss. The granular sludge and flocculent sludge can be mixed and centrally recovered in the sludge tank. The sludge concentrated in the sludge tank will also settle, and can enter the recycle pump inlet of the anaerobic reactor through the sludge recovery pump communicating the bottom of the sludge tank with the anaerobic reactor for reuse and recovery. During the sludge recovery process, the recovery effect of sludge with different forms and masses is better, and the sludge can be recycled, which can improve the sewage treatment effect and solve the technical problem of the unsatisfactory sewage treatment effect to a certain extent. Description of the Drawings
[0025] To more clearly illustrate the technical solutions in the embodiments of the present application, the following will briefly introduce the drawings required for the description of the embodiments. Obviously, the drawings in the following description are some embodiments of the present application. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.
[0026] Figure 1 It shows a schematic structural diagram of an anaerobic sludge treatment and recovery system in some embodiments or certain embodiments of the present application.
[0027] Figure 2 It shows a simplified schematic structural diagram of a sludge separation tank in some embodiments or certain embodiments of the present application.
[0028] Explanation of reference numerals: 1, anaerobic reactor; 11, water outlet; 12, circulation pump inlet; 2, sludge separation tank; 21, tank opening; 3, centrifuge; 31, feed inlet; 32, slag discharge port; 4, sludge tank; 5, sludge recovery pump; 6, medium carrier; 7, precipitator; 71, light phase outlet; 72, water retaining member; 73, groove; 74, heavy phase outlet; 8, pipeline; 100, liquid level. Detailed implementation manners
[0029] The following will clearly and completely describe the technical solutions in the embodiments of the present utility model with reference to the drawings in the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, rather than all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative efforts belong to the scope of protection of the present utility model.
[0030] It should be noted that all directional indications in the embodiments of the present utility model are only used to explain the relative positional relationship and movement conditions between components in a specific posture. If this specific posture changes, the directional indications will also change accordingly.
[0031] In the present utility model, unless otherwise clearly defined and limited, terms such as "connection" and "fixation" should be understood in a broad sense. For example, "fixation" can be a fixed connection, a detachable connection, or integrated; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the internal communication of two components or the interaction relationship between two components, unless otherwise clearly limited. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances.
[0032] In addition, in the present utility model, descriptions such as "first", "second", etc. are only for descriptive purposes and should not be construed as indicating or implying their relative importance or implicitly specifying the quantity of the indicated technical features. Thus, features defined with "first" and "second" may explicitly or implicitly include at least one such feature. In addition, the technical solutions between various embodiments may be combined with each other, but it must be based on the ability of those of ordinary skill in the art to implement. When the combination of technical solutions results in contradictions or cannot be implemented, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection required by the present utility model.
[0033] In the related art, the sludge obtained after the sewage is treated by the anaerobic reactor and the sludge separation tank can be re-transported from the bottom of the sludge separation tank to the anaerobic reactor for treatment. However, in this treatment method, some sludge with a relatively light quality and difficult to settle will be directly discharged with the water flow, resulting in the problem of sludge loss, which affects the sewage treatment and recovery rate. The embodiments of the present application provide an anaerobic sludge treatment and recovery system, which can at least solve the above technical problems to a certain extent.
[0034] The present application will be described below with reference to the accompanying drawings:
[0035] Figure 1 FIG. shows the structural schematic diagram of an anaerobic sludge treatment and recovery system in some embodiments or certain embodiments of the present application. Referring to Figure 1 It can be seen that the embodiments of the present application provide an anaerobic sludge treatment and recovery system, including:
[0036] Anaerobic reactor 1.
[0037] Sludge separation tank 2, which is communicated with the water outlet 11 of the anaerobic reactor 1.
[0038] Centrifuge 3, the feed inlet 31 of which is communicated with the bottom of the sludge separation tank 2.
[0039] Sludge tank 4, the sludge tank 4 is communicated with the slag discharge port of the centrifuge 3 and the tank opening 21 of the sludge separation tank 2, and the bottom of the sludge tank 4 is communicated with the circulation pump inlet 12 of the anaerobic reactor 1; and,
[0040] Sludge recovery pump 5, which is arranged between the bottom of the sludge tank 4 and the circulation pump inlet 12 of the anaerobic reactor 1 and communicates the sludge tank 4 with the circulation pump inlet 12.
[0041] In the anaerobic sludge treatment and recovery system, the anaerobic reactor 1 can perform basic treatment on sewage. The preliminarily treated sewage still contains a certain concentration of COD and ammonia nitrogen. The sewage containing sludge enters the sludge separation tank 2 from the water outlet 11 of the anaerobic reactor 1. The flocculent sludge with a larger mass can settle at the bottom of the sludge separation tank 2. Some of the granular sludge with a lighter mass may be located at the position of the liquid level 100 near the pool mouth 21 of the sludge separation tank 2 and is not easy to settle. For the easily settleable sludge with a larger mass, it can enter the centrifuge 3 connected to the bottom of the sludge separation tank 2 through the feed port 31. In the centrifuge 3, secondary liquid-solid separation is carried out, and the sludge more concentratedly enters the sludge tank 4 from the slag discharge port 32 of the centrifuge 3. At the same time, the granular sludge with a lighter mass in the sludge separation tank 2 can also enter the sludge tank 4 connected to the pool mouth 21 of the sludge separation tank 2, enabling the simultaneous centralized recovery of flocculent sludge and granular sludge and reducing the possibility of granular sludge loss. The granular sludge and flocculent sludge can be mixed and centrally recovered in the sludge tank 4. The sludge concentrated in the sludge tank 4 will also settle, and can enter the recycle pump inlet 12 of the anaerobic reactor 1 through the sludge recovery pump 5 connecting the bottom of the sludge tank 4 and the anaerobic reactor 1 for reuse and recovery. During the treatment and recovery process of sewage, the recovery effect of sludge with different forms and masses is good, and the sludge can be recycled, which can improve the treatment and recovery effect of sewage and solve to a certain extent the technical problem that the treatment and recovery effect of sewage is not ideal enough.
[0042] It should be noted that Figure 1 The structural diagrams of the anaerobic reactor 1, sludge separation tank 2, centrifuge 3, sludge tank 4, and sludge recovery pump 5 shown in are all schematic diagrams and are not used to limit the specific structures of the corresponding equipment. What will be involved in the following Figure 2 Similarly. The recycle pump inlet 12 of the anaerobic reactor 1 has the function of the water inlet of a conventional anaerobic reactor 1.
[0043] In some or certain embodiments, the anaerobic sludge treatment and recovery system further includes:
[0044] The medium carrier 6, which is provided with an output end for outputting the medium and connected to the bottom of the sludge tank 4.
[0045] In the anaerobic sludge treatment and recovery system, there is also a medium carrier 6. The medium carrier 6 is provided with an output end for outputting the medium and connected to the bottom of the sludge tank 4. Then the medium carrier 6 can transport the medium to the bottom of the sludge tank 4 through the output end. The medium entering the sludge tank 4 can disturb the sludge at the bottom of the sludge tank 4, enabling the sludge with different masses in the sludge tank 4 to be mixed and then settle, which is beneficial to promoting the settlement of the mixed sludge, maintaining the activity of the sludge in the sludge tank 4, and promoting the settlement of the sludge, which is beneficial to the reuse and recovery of the sludge.
[0046] In some embodiments, the medium carrier 6 is an inert gas carrier. The inert medium carrier 6 can introduce inert gas into the sludge tank 4 through the output end. Introducing inert gas can promote the mixing and sedimentation of the sludge in the sludge tank 4, generally will not affect the environment in the sludge tank 4, and has good safety.
[0047] In some embodiments, the medium carrier 6 can be a nitrogen gas pipeline flowing with nitrogen gas under a certain pressure, or a nitrogen gas cylinder containing nitrogen gas under a certain pressure, etc. Nitrogen is relatively safe, and in the preparation process of fuel ethanol, there is usually also a nitrogen gas pipeline, which is also convenient for controlling the inflow of nitrogen into the sludge tank 4.
[0048] In some embodiments, the medium carrier 6 can also be a pressure bottle containing a liquid medium, etc. The liquid medium can also be a liquid that can promote the mixing and sedimentation of the sludge in the sludge tank 4, etc. It can also promote the mixing and sedimentation of the sludge in the sludge tank 4.
[0049] In some embodiments, the anaerobic sludge treatment and recovery system further includes:
[0050] A settler 7, located in the sludge separation tank 2, and the light phase outlet 71 of the settler 7 faces the pool opening 21 of the sludge separation tank 2.
[0051] After the sewage treated by the anaerobic reactor 1 enters the sludge separation tank 2, it can enter the settler 7 from the pool opening 21 of the sludge separation tank 2. The settler 7 can promote the sedimentation of the sludge in the sludge separation tank 2, and can make the liquid phases with different qualities flow out from the light phase outlet 71, and the sludge with a larger mass flow out from the heavy phase outlet 74, which is beneficial to improving the treatment and recovery efficiency of the sludge. For some fine sludge with a small mass and volume, it will also flow out from the light phase outlet 71.
[0052] Figure 2 Shows a simplified structural schematic diagram of a sludge separation tank in some embodiments or certain embodiments of the present application. Refer to Figure 2 , in some embodiments, at least two settlers 7 are arranged side by side in the sludge separation tank 2. It can promote the separation and sedimentation of the sludge, which is beneficial to improving the treatment and recovery efficiency of the sludge.
[0053] In some embodiments, the settler 7 is provided with a plurality of blocking members distributed around the light phase outlet 71, and a groove 73 is formed between adjacent two blocking members.
[0054] The settler 7 is provided with a plurality of blocking members distributed around its light-phase outlet 71, and grooves 73 are formed between adjacent two blocking members. The sewage carrying sludge can enter the settler 7 from the light-phase outlet 71 of the settler 7, and the sludge can settle down in the settler 7. However, some particles with lighter mass or tiny sludge will still float at the light-phase outlet 71 of the settler 7. These particles or tiny sludge can flow out from the grooves 73 between adjacent two blocking members together with the liquid at the light-phase outlet 71, while the sludge with larger mass, etc. will be blocked by the blocking members and settle down, which is beneficial to the settlement of sludge. At the same time, for the tiny sludge with too small mass itself, it can also flow out from the settler 7 and enter the sludge pool 4 together with the water flow for subsequent recovery treatment. It is beneficial to promote the treatment and recovery efficiency of sludge.
[0055] In some embodiments, the blocking members are triangular in shape, and a plurality of blocking members are connected end to end in sequence around the light-phase outlet 71. It is easy to prepare and has a good treatment and recovery effect on sludge.
[0056] In some embodiments, the blocking members can also be set to sharp-cornered or pyramid-shaped, etc. different from the triangular shape.
[0057] In some embodiments, the settler 7 can be connected to a bracket (not shown in the figure) or a cross plate (not shown in the figure) spanning the pool mouth 21 of the sludge separation tank 2. The sewage flowing out from the water outlet 11 in the anaerobic reactor 1 can enter from the inlet of the settler 7. The sedimentation principle of the settler 7 can be gravity sedimentation. The water-blocking member 72 can be arranged circumferentially corresponding to the light-phase outlet 71 of the settler 7 and connected to the main body of the settler 7. Figure 2 The liquid level 100 in the sludge separation tank 2 is also shown.
[0058] In some embodiments, the centrifuge 3 is a horizontal screw centrifuge 3. The separation effect is better. After the sludge enters the horizontal screw centrifuge 3, the drum of the centrifuge 3 and the spiral feeding blade rotate at a certain differential speed in the same direction at high speed. The material is continuously introduced into the inner cylinder of the feeding spiral through the feeding pipe, and after acceleration, it enters the drum. Under the action of centrifugal force, the heavier solid-phase sludge deposits on the drum wall to form a slag layer. The spiral feeding blade continuously pushes the deposited solid-phase sludge to the tapered end of the drum and discharges it out of the machine through the slag discharge port 32 to the sludge pool 4. The lighter liquid phase forms an inner liquid phase, continuously overflows from the large end of the drum, and is discharged through the liquid discharge port.
[0059] In some embodiments, the anaerobic sludge treatment and recovery system further includes:
[0060] An OA tank (not shown in the figure) communicated with the liquid discharge port (not shown in the figure) of the centrifuge 3. The OA tank can recover the finally discharged liquid, which is more environmentally friendly. Among them, the OA tank is a facultative anaerobic aerobic tank.
[0061] In some embodiments, the drain outlet of the centrifuge 3 can also be connected to different devices or ponds according to requirements.
[0062] In some embodiments, the sludge pond 4 is provided with a thermometer and a pH meter. It can monitor the pH and temperature of the liquid and sludge in the sludge pond 4, which is convenient for monitoring the sludge situation in the sludge pond 4.
[0063] In some embodiments, the temperature in the sludge pond 4 can be 35 - 37 °C, and the pH value can be 7 - 8. It has relatively high safety.
[0064] It should be noted that in this application, both the sludge pond 4 and the sludge separation tank 2 can be box-shaped containers with openings, etc., and the opening can form a pool mouth 21, and the side opposite to the opening can form a bottom.
[0065] In some embodiments, the anaerobic reactor 1 can be an anaerobic reactor 1 including an inlet pipe, a water distributor, a three-phase separator, and an outlet pipe. Among them, the inlet pipe forms the circulation pump inlet 12 of the anaerobic reactor 1, and the outlet pipe forms the outlet 11 of the anaerobic reactor 1. Sewage can enter the water distributor through the inlet pipe, contact with anaerobic sludge, and move upward from bottom to top under the drive of the water flow rate in the water. The mud-water mixture passes through the three-phase separator, and the separated sludge descends to the sludge area. The sewage will carry part of the sludge into the sludge separation tank 2. The temperature of the anaerobic reactor 1 is controlled at 36 - 37 °C, the pH is controlled at 7 - 8, and the top pressure is within 0.9 kPa. It has relatively high safety.
[0066] It should be noted that in this application, the connections between the anaerobic reactor 1 and the sludge separation tank 2, between the sludge separation tank 2 and the centrifuge 3, between the sludge separation tank 2 and the sludge pond 4, between the centrifuge 3 and the sludge pond 4, between the sludge pond 4 and the sludge recovery pump 5, and between the sludge recovery pump 5 and the anaerobic reactor 1 can all be achieved through different pipelines 8. The pipeline 8 can include a plurality of connected pipelines and control valves (not shown in the figure) for controlling the on-off of the pipelines. It is convenient to realize the connection between different devices in this application.
[0067] In the description of this specification, the description with reference to terms such as "one embodiment", "some embodiments", "example", "specific example", or "some examples" means that the specific features, structures, materials, or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of this application. In this specification, the schematic expressions of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials, or characteristics described can be combined in a suitable manner in any one or more embodiments or examples. In addition, those skilled in the art can combine and combine the different embodiments or examples described in this specification.
[0068] In addition, the technical solutions between various embodiments can be combined with each other, provided that they can be implemented by those of ordinary skill in the art. When the combination of technical solutions results in contradictions or cannot be implemented, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection claimed in this application.
[0069] Although the embodiments of the present application have been shown and described, those of ordinary skill in the art can understand that various changes, modifications, substitutions, and variations can be made to these embodiments without departing from the principles and spirit of the present application. The scope of the present application is defined by the claims and their equivalents.
Claims
1. An anaerobic sludge treatment and recovery system, characterized in that, Comprising: Anaerobic reactor; Sludge separation tank, the tank opening of which is communicated with the water outlet of the anaerobic reactor; Centrifuge, the feed inlet of which is communicated with the bottom of the sludge separation tank; Sludge tank, the sludge tank communicates the slag discharge port of the centrifuge with the tank opening, and the bottom of the sludge tank is communicated with the inlet of the circulation pump of the anaerobic reactor; Sludge recovery pump, which is arranged between the bottom of the sludge tank and the inlet of the circulation pump of the anaerobic reactor and communicates the sludge tank with the inlet of the circulation pump.
2. The anaerobic sludge treatment and recovery system according to claim 1, wherein The anaerobic sludge treatment and recovery system further comprises: Medium carrier, provided with an output end for outputting the medium and communicated to the bottom of the sludge tank.
3. The anaerobic sludge treatment and recovery system according to claim 2, wherein The medium carrier is an inert gas carrier.
4. The anaerobic sludge treatment and recovery system according to any one of claims 1 to 3, characterized in that, The anaerobic sludge treatment and recovery system further comprises: Settler, located in the sludge separation tank, and the light phase outlet of the settler faces the tank opening of the sludge separation tank.
5. The anaerobic sludge treatment and recovery system according to claim 4, characterized in that, At least two of the settlers are arranged side by side in the sludge separation tank.
6. The anaerobic sludge treatment and recovery system according to claim 4, characterized in that The settler is provided with a plurality of blocking members distributed around the light phase outlet, and a groove is formed between two adjacent blocking members.
7. The anaerobic sludge treatment and recovery system according to claim 6, characterized in that The blocking member is triangular, and a plurality of the blocking members are connected end to end in sequence to surround the light phase outlet.
8. The anaerobic sludge treatment and recovery system according to any one of claims 1 to 3, characterized in that, The centrifuge is a horizontal screw centrifuge.
9. The anaerobic sludge treatment and recovery system according to claim 8, wherein, The anaerobic sludge treatment and recovery system further comprises: OA tank communicated with the liquid discharge port of the centrifuge.
10. The anaerobic sludge treatment and recovery system according to any one of claims 1 to 3, characterized in that, The sludge tank is provided with a thermometer and a pH meter.