Biochemical sludge treatment system for coal chemical industry

Abstract

The utility model discloses a biochemical sludge treatment system for the coal chemical industry. The biochemical sludge treatment system comprises a sludge concentration working section, a sludge dewatering working section, a sludge-water mixed utilization working section, a sludge drying working section and a dried sludge treatment working section, muddy water is introduced into the input end of the sludge concentration section, and the output end of the sludge concentration section is respectively connected with the input end of the sludge dewatering section and the input end of the muddy water mixing and utilizing section; the output end of the mud-water mixed utilization section is connected with the fine grinding machine, and mud-water mixed liquid can be conveyed to the fine grinding machine; the output end of the sludge dewatering section is connected with the input end of the sludge drying section, and the output end of the sludge drying section is connected with the input end of the dried sludge treatment section; and the output end of the sludge treatment section can convey the dried sludge to a solid waste landfill. The problem that the biochemical sludge in the coal chemical industry cannot be well treated in the prior art is solved, energy of the biochemical sludge in the coal chemical industry is recycled, and pollution of the sludge to the environment is reduced.

Description

Technical Field

[0001] The present application relates to the technical field of coal chemical water treatment, and in particular to a coal chemical biochemical sludge treatment system. Background Art

[0002] With the rapid increase in sewage treatment rates, the problem of coal chemical sludge treatment is becoming more and more serious. From the perspective of solid waste treatment, if the sludge treatment is not thorough, sewage treatment cannot be finally solved. The pollution source is only converted from liquid to solid, which is still a long way from the reduction, harmlessness and resource utilization of sewage.

[0003] At present, the SBR (Sequencing Batch Reactor Activated Sludge Process) process has been widely used around the world, but a large amount of biochemical sludge will be produced during the process. The current treatment process of biochemical sludge is mainly to dehydrate and then directly landfill it as general solid waste. This treatment method not only has high treatment costs, but also has a certain impact on the environment. It is necessary to increase the recycling of sludge energy resources to promote low-carbon circular green development. Utility Model Content

[0004] The embodiment of the present application solves the problem that the coal chemical biochemical sludge cannot be well treated in the prior art by providing a coal chemical biochemical sludge treatment system, realizes the recovery of coal chemical biochemical sludge energy, and reduces the pollution of sludge to the environment.

[0005] The embodiment of the utility model provides a coal chemical biochemical sludge treatment system, including a sludge concentration section, a sludge dewatering section, a sludge-water mixing and utilization section, a sludge drying section and a dried sludge treatment section; sludge and water are introduced into the input end of the sludge concentration section, and the output end of the sludge concentration section is respectively connected with the input end of the sludge dewatering section and the input end of the sludge-water mixing and utilization section; the output end of the sludge-water mixing and utilization section is connected with a fine grinder, and can transport the sludge-water mixture to the fine grinder; the output end of the sludge dewatering section is connected with the input end of the sludge drying section, and the output end of the sludge drying section is connected with the input end of the dried sludge treatment section; the output end of the dried sludge treatment section can transport the sludge to a solid waste landfill.

[0006] In a possible implementation, the sludge thickening section includes an SBR tank and a sludge thickening tank; sewage is introduced into the input end of the SBR tank, the output end of the SBR tank is connected to the input end of the sludge thickening tank, and the output end of the sludge thickening tank is respectively connected to the input end of the sludge dewatering section and the input end of the sludge-water mixing and utilization section.

[0007] In a possible implementation, the sludge dewatering section includes a sludge dewatering machine and a dosing device; the input end of the sludge dewatering machine is connected to the output end of the sludge thickening tank; the dosing device is arranged at the input end of the sludge dewatering machine; the output end of the sludge dewatering machine is connected to the input end of the sludge drying section.

[0008] In a possible implementation, the mud-water mixing and utilization section includes a coarse slurry buffer tank and a coarse slurry delivery pump, a fine slurry buffer tank and a fine slurry delivery pump; the input end of the coarse slurry buffer tank and the input end of the fine slurry buffer tank are both connected to the output end of the sludge thickening tank; the output end of the coarse slurry buffer tank is connected to the coarse slurry delivery pump; the output end of the fine slurry buffer tank is connected to the fine slurry delivery pump; the coarse slurry delivery pump is connected to a fine grinder; and the fine slurry delivery pump is connected to an ultrafine grinder.

[0009] In a possible implementation, the sludge drying section includes a wet sludge silo, a sludge screw conveying pump and a sludge dryer; the input end of the wet sludge silo is connected to the output end of the sludge dewatering machine; the output end of the wet sludge silo is connected to the input end of the sludge screw conveying pump, and the output end of the sludge screw conveying pump is connected to the input end of the sludge dryer; the output end of the sludge dryer is connected to the input end of the drying sludge treatment section.

[0010] In a possible implementation, the drying sludge treatment section includes a dry sludge silo; the input end of the dry sludge silo is connected to the output end of the sludge dryer; the output end of the dry sludge silo can transport the sludge to the solid waste landfill.

[0011] In a possible implementation, the drying sludge treatment section also includes a coal bunker, an odor induced draft fan and an induced draft fan; the output end of the dry sludge bunker is connected to the input end of the coal bunker; the dry sludge bunker is connected to the input end of the odor induced draft fan; the output end of the coal bunker can mix the sludge with coal, and finally transport it to the pulverized coal boiler for co-combustion; the coal bunker is connected to the induced draft fan.

[0012] In a possible implementation, it further includes a filtrate collecting tank; the sludge thickening tank, the sludge drying machine and the sludge dewatering machine are all connected to the filtrate collecting tank.

[0013] One or more technical solutions provided by this application have at least the following technical effects:

[0014] The embodiment of the utility model adopts a sludge concentration section, a sludge dewatering section, a sludge-water mixing and utilization section, a sludge drying section and a dried sludge treatment section. The input end of the sludge concentration section is fed with sewage, and the output end of the sludge concentration section is respectively connected to the input end of the sludge dewatering section and the input end of the sludge-water mixing and utilization section; the output end of the sludge-water mixing and utilization section is connected to a fine grinder, and the sludge and water are processed by the sludge concentration section. A part of the sludge and water is transported to the fine grinder for processing through the sludge-water mixing and utilization section; the other part of the sludge and water is dehydrated by the sludge dewatering machine. The output end of the sludge dewatering section is connected to the input end of the sludge drying section, and the output end of the sludge drying section is connected to the input end of the dried sludge treatment section. After being processed by the sludge dewatering machine, the sludge and water enter the sludge drying machine for further dehydration, and the dehydrated dried sludge is then transported to a solid waste landfill for treatment. The present application solves the problem that the existing technology cannot properly treat the biochemical sludge from the coal chemical industry, realizes the recovery of the energy of the biochemical sludge from the coal chemical industry, and reduces the pollution of the sludge to the environment. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] In order to more clearly illustrate the technical solutions of the embodiments of the utility model, the following briefly introduces the drawings required for use in the description of the embodiments of the utility model. Obviously, the drawings described below are some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0016] Figure 1 A schematic diagram of a coal chemical biochemical sludge treatment system provided in an embodiment of the present application.

[0017] Icons: 1-sludge thickening section; 11-SBR tank; 12-sludge thickening tank; 2-sludge dewatering section; 21-sludge dewatering machine; 22-dosing device; 3-sludge-water mixing and utilization section; 31-coarse slurry buffer tank; 32-coarse slurry delivery pump; 33-fine slurry buffer tank; 34-fine slurry delivery pump; 4-sludge drying section; 41-wet sludge silo; 42-sludge screw delivery pump; 43-sludge dryer; 5-dried sludge treatment section; 51-dry sludge silo; 52-coal bunker; 53-odor induced draft fan; 54-induced draft fan; 6-filtrate collection tank. DETAILED DESCRIPTION

[0018] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0019] In the description of the embodiments of the present utility model, it should be noted that the orientation or positional relationship indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inside", "outside", etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the embodiments of the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present utility model. The terms "first", "second", and "third" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance. In addition, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be a connection between the two elements. For ordinary technicians in this field, the specific meanings of the above terms in the embodiments of the present utility model can be understood according to specific circumstances.

[0020] The embodiment of the utility model proposes a coal chemical biochemical sludge treatment system, which includes a sludge concentration section 1, a sludge dewatering section 2, a sludge-water mixing and utilization section 3, a sludge drying section 4 and a dried sludge treatment section 5; sludge and water are introduced into the input end of the sludge concentration section 1, and the output end of the sludge concentration section 1 is respectively connected to the input end of the sludge dewatering section 2 and the input end of the sludge-water mixing and utilization section 3; the output end of the sludge-water mixing and utilization section 3 is connected to a fine grinder, and the sludge-water mixture can be transported to the fine grinder; the output end of the sludge dewatering section 2 is connected to the input end of the sludge drying section 4, and the output end of the sludge drying section 4 is connected to the input end of the dried sludge treatment section 5; the output end of the dried sludge treatment section 5 can transport the sludge to a solid waste landfill.

[0021] Exemplarily, mud and water are introduced into the input end of the sludge concentration section 1, and a part of the mud and water is transported to the mud and water mixing and utilization section 3 through a delivery pump, and the mud and water mixing and utilization section 3 then transports the mud and water to the fine grinder for treatment; the other part of the mud and water enters the sludge dewatering section 2 through a delivery pump for dehydration treatment; after treatment in the sludge dewatering section 2, it enters the sludge drying section 4 for further dehydration treatment, and the dehydrated dried sludge is then transported to the solid waste landfill for treatment through the sludge treatment section.

[0022] In the present application embodiment, Figure 1 As shown, the sludge thickening section 1 includes an SBR tank 11 and a sludge thickening tank 12; sewage is introduced into the input end of the SBR tank 11, and the output end of the SBR tank 11 is connected to the input end of the sludge thickening tank 12, and the output end of the sludge thickening tank 12 is respectively connected to the input end of the sludge dewatering section 2 and the input end of the sludge-water mixing and utilization section 3.

[0023] Exemplarily, muddy water is introduced into the input end of the SBR tank 11. After the muddy water is treated by the SBR tank 11, the residual sludge generated is transported to the sludge thickening tank 12 for concentration, and a part of the muddy water is transported to the mud-water mixing and utilization section 3 through a delivery pump; the mud-water mixing and utilization section 3 then transports the muddy water to the fine grinder for treatment; the other part of the muddy water enters the sludge dewatering machine 21 for dehydration treatment through a delivery pump; the muddy water is treated by the sludge dewatering machine 21 and then enters the sludge drying machine 43 for further dehydration, and the dehydrated dried sludge is transported to the solid waste landfill for treatment.

[0024] Exemplarily, the SBR tank 11 is used to treat water from the regulating tank, and the sludge thickening tank 12 is used to receive the mud-water mixture generated during the sewage treatment process of the SBR tank 11 .

[0025] In the present application embodiment, Figure 1 As shown, the sludge dewatering section 2 includes a sludge dewatering machine 21 and a dosing device 22; the input end of the sludge dewatering machine 21 is connected to the output end of the sludge thickening tank 12; the dosing device 22 is arranged at the input end of the sludge dewatering machine 21; the output end of the sludge dewatering machine 21 is connected to the input end of the sludge drying section 4.

[0026] Exemplarily, the sludge dewatering machine 21 is used to remove moisture from the muddy water, and the dosing device 22 is used to add a reagent into the sludge dewatering machine 21, so that the sludge particles in the muddy water in the sludge dewatering machine 21 are more tightly bound together, and more moisture in the sludge can be released;

[0027] Exemplarily, part of the muddy water enters the sludge dewatering machine 21 through a delivery pump for dehydration treatment; the dosing device 22 is arranged at the input end of the sludge dewatering machine 21, which can make the sludge particles in the muddy water in the sludge dewatering machine 21 more tightly bound, thereby releasing more water in the sludge. After being treated by the sludge dewatering machine 21, the muddy water enters the sludge drying section 4 for further dehydration, and the dehydrated dried sludge is transported to the solid waste landfill for treatment.

[0028] In the present application embodiment, Figure 1 As shown, the mud-water mixing and utilization section 3 includes a coarse pulp buffer tank 31 and a coarse pulp delivery pump 32, a fine pulp buffer tank 33 and a fine pulp delivery pump 34; the input end of the coarse pulp buffer tank 31 and the input end of the fine pulp buffer tank 33 are both connected to the output end of the sludge thickening tank 12; the output end of the coarse pulp buffer tank 31 is connected to the coarse pulp delivery pump 32; the output end of the fine pulp buffer tank 33 is connected to the fine pulp delivery pump 34; the coarse pulp delivery pump 32 is connected to the fine grinder; the fine pulp delivery pump 34 is connected to the ultrafine grinder.

[0029] Exemplarily, muddy water enters the coarse slurry buffer tank 31 and the fine slurry buffer tank 33 respectively through a delivery pump; the output end of the coarse slurry buffer tank 31 is connected to the coarse slurry delivery pump 32, and the coarse slurry delivery pump 32 can deliver the muddy water together with the slurry to the fine grinder for treatment; the output end of the fine slurry buffer tank 33 is connected to the fine slurry delivery pump 34, which is used to deliver the muddy water together with the slurry to the ultrafine grinder for treatment.

[0030] In the present application embodiment, Figure 1 As shown, the sludge drying section 4 includes a wet sludge silo 41, a sludge screw conveying pump 42 and a sludge dryer 43; the input end of the wet sludge silo 41 is connected to the output end of the sludge dewatering machine 21; the output end of the wet sludge silo 41 is connected to the input end of the sludge screw conveying pump 42, and the output end of the sludge screw conveying pump 42 is connected to the input end of the sludge dryer 43; the output end of the sludge dryer 43 is connected to the input end of the drying sludge treatment section 5.

[0031] Exemplarily, the input end of the wet sludge silo 41 is connected to the output end of the sludge dewatering machine 21, and is used to receive the sludge transmitted after dehydration by the sludge dewatering machine 21; the output end of the wet sludge silo 41 is connected to the input end of the sludge screw conveying pump 42, and the sludge in the wet sludge silo 41 can be conveyed to the sludge screw conveying pump 42 for processing; the output end of the sludge screw conveying pump 42 is connected to the input end of the sludge dryer 43, and the sludge screw conveying pump 42 can convey sludge into the sludge dryer 43, and the sludge dryer 43 can further dehydrate and dry the sludge; it should be noted that the steam required by the sludge dryer 43 comes from the low-pressure steam of the pipeline network;

[0032] In the present application embodiment, Figure 1 As shown, the drying sludge treatment section 5 includes a dry sludge silo 51; the input end of the dry sludge silo 51 is connected to the output end of the sludge dryer 43; the output end of the dry sludge silo 51 can transport the sludge to a solid waste landfill.

[0033] Exemplarily, the input end of the dry sludge silo 51 is connected to the output end of the sludge dryer 43, so that the dried sludge can be transported to a solid waste landfill for treatment.

[0034] In the present application embodiment, Figure 1 As shown, the drying sludge treatment section 5 also includes a coal bunker 52, an odor induced draft fan 53 and an induced draft fan 54; the output end of the dry sludge bunker 51 is connected to the input end of the coal bunker 52; the dry sludge bunker 51 is connected to the odor induced draft fan 53; the output end of the coal bunker 52 can mix the sludge with coal, and finally transport it to the pulverized coal boiler for co-combustion; the coal bunker 52 is connected to the induced draft fan 54.

[0035] Exemplarily, the input end of the dry sludge silo 51 is connected to the output end of the sludge dryer 43, and the output end of the dry sludge silo 51 is connected to the coal silo 52, so that the dried sludge can be mixed with coal and finally transported to the pulverized coal boiler for mixing and burning;

[0036] Exemplarily, the dry sludge silo 51 is connected to an odor induced draft fan 53, which can transport the gas generated in the dry sludge silo 51 to an odor recovery device for treatment; the coal silo 52 is connected to an induced draft fan 54, which can transport the gas generated in the coal silo 52 to an odor recovery device for treatment.

[0037] In the present application embodiment, Figure 1 As shown, it also includes a filtrate collecting tank 6; the sludge thickening tank 12, the sludge drying machine 43 and the sludge dewatering machine 21 are all connected to the filtrate collecting tank 6.

[0038] Exemplarily, the supernatant of the sludge thickening tank 12 can enter the filtrate collecting tank 6 through a pipeline; the filtrate produced by the sludge dryer 43 can enter the filtrate collecting tank 6 through a pipeline; the filtrate produced by the sludge dewatering machine 21 can enter the filtrate collecting tank 6 through a pipeline.

[0039] For example, in actual application, the water content of the mud-water mixture in the sludge concentration tank 12 is about 97%. A part of the mud-water is transported to the mud-water mixing and utilization section 3 for treatment through a delivery pump, so that the mud-water can enter the fine grinder and the ultrafine grinder for treatment with the slurry; the other part of the mud-water is transported to the sludge dewatering machine 21 for treatment through a delivery pump, wherein the dosing device 22 transports the dissolved and configured PAM agent to the sludge dewatering machine 21 through a delivery pump, and the water content of the sludge after treatment by the sludge dewatering machine 21 is ≤82%; the sludge after centrifugal dehydration from the sludge dewatering machine 21 falls from a high position into the wet sludge silo 41 by gravity for temporary storage, and when the sludge is stored to a certain amount, the sludge is transported to the sludge drying machine 43 through the sludge screw delivery pump 42. Among them, the top of the dry sludge silo 51 is provided with an odor outlet, and the odor is led out by the odor induced draft fan 53 of the sewage treatment plant. The top of the coal bunker 52 is provided with an odor outlet, and the odor is discharged by the induced draft fan 54 of the sewage treatment plant. The dried sludge with a moisture content of ≤40% after being treated by the sludge dryer 43 enters the dry sludge silo 51, which can transfer and temporarily store the dried sludge.

[0040] For example, in actual application, the dried sludge in the dry sludge silo 51 is transported to the coal silo 52 by vehicles, and the dried sludge is mixed with raw coal and then transported to the pulverized coal boiler for mixed combustion via a conveyor belt.

[0041] For example, when the process cannot carry out co-combustion, the dried sludge in the sludge silo 51 is transported to a solid waste landfill for landfill disposal.

[0042] The various embodiments in this specification are described in a progressive manner, and the same or similar parts between the various embodiments can be referenced to each other. Each embodiment focuses on the differences from other embodiments.

[0043] The above embodiments are only used to illustrate the technical solutions of the present application, rather than to limit the present application. Although the present application has been described in detail with reference to the aforementioned embodiments, a person of ordinary skill in the art should understand that the technical solutions described in the aforementioned embodiments may still be modified, or some or all of the technical features thereof may be replaced by equivalents. However, these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the present application.

Claims

1. A coal chemical biochemical sludge treatment system, characterized in that: It includes a sludge concentration section (1), a sludge dewatering section (2), a sludge-water mixing and utilization section (3), a sludge drying section (4) and a dried sludge treatment section (5); The input end of the sludge concentration section (1) is fed with sludge water, and the output end of the sludge concentration section (1) is respectively connected to the input end of the sludge dehydration section (2) and the input end of the sludge water mixing and utilization section (3); The output end of the mud-water mixing and utilizing section (3) is connected to a fine grinder, and can transport the mud-water mixture to the fine grinder; The output end of the sludge dewatering section (2) is connected to the input end of the sludge drying section (4), and the output end of the sludge drying section (4) is connected to the input end of the dried sludge treatment section (5); the output end of the dried sludge treatment section (5) can transport the sludge to a solid waste landfill.

2. The coal chemical biochemical sludge treatment system according to claim 1, characterized in that: The sludge concentration section (1) comprises an SBR tank (11) and a sludge concentration tank (12); Sewage is introduced into the input end of the SBR tank (11), and the output end of the SBR tank (11) is connected to the input end of the sludge concentration tank (12), and the output end of the sludge concentration tank (12) is respectively connected to the input end of the sludge dewatering section (2) and the input end of the sludge-water mixing and utilization section (3).

3. The coal chemical biochemical sludge treatment system according to claim 2, characterized in that: The sludge dewatering section (2) comprises a sludge dewatering machine (21) and a dosing device (22); The input end of the sludge dewatering machine (21) is connected to the output end of the sludge concentration tank (12); the dosing device (22) is arranged at the input end of the sludge dewatering machine (21); The output end of the sludge dewatering machine (21) is connected to the input end of the sludge drying section (4).

4. The coal chemical biochemical sludge treatment system according to claim 2, characterized in that: The mud-water mixing and utilization section (3) comprises a coarse slurry buffer tank (31) and a coarse slurry delivery pump (32), a fine slurry buffer tank (33) and a fine slurry delivery pump (34); The input end of the coarse slurry buffer tank (31) and the input end of the fine slurry buffer tank (33) are both connected to the output end of the sludge thickening tank (12); The output end of the coarse stock buffer tank (31) is connected to the coarse stock delivery pump (32); the output end of the fine stock buffer tank (33) is connected to the fine stock delivery pump (34); The coarse pulp delivery pump (32) is connected to the fine grinder; the fine pulp delivery pump (34) is connected to the superfine grinder.

5. The coal chemical biochemical sludge treatment system according to claim 3, characterized in that: The sludge drying section (4) comprises a wet sludge silo (41), a sludge screw conveying pump (42) and a sludge dryer (43); The input end of the wet sludge silo (41) is connected to the output end of the sludge dewatering machine (21); The output end of the wet sludge silo (41) is connected to the input end of the sludge screw conveying pump (42), and the output end of the sludge screw conveying pump (42) is connected to the input end of the sludge dryer (43); The output end of the sludge dryer (43) is connected to the input end of the dried sludge treatment section (5).

6. The coal chemical biochemical sludge treatment system according to claim 5, characterized in that: The drying sludge treatment section (5) comprises a dry sludge silo (51); The input end of the dry sludge silo (51) is connected to the output end of the sludge drying machine (43); The output end of the dry sludge silo (51) can transport the sludge to the solid waste landfill.

7. The coal chemical biochemical sludge treatment system according to claim 6, characterized in that: The drying sludge treatment section (5) further comprises a coal bunker (52), an odor induced draft fan (53) and an induced draft fan (54); The output end of the dry sludge silo (51) is connected to the input end of the coal silo (52); the dry sludge silo (51) is connected to the input end of the odor induced draft fan (53); The output end of the coal bunker (52) can mix the sludge with coal and finally transport it to the pulverized coal boiler for mixing and burning; the coal bunker (52) is connected to the induced draft fan (54).

8. The coal chemical biochemical sludge treatment system according to claim 5, characterized in that: It also includes a filtrate collection tank (6); The sludge concentration tank (12), the sludge drying machine (43) and the sludge dewatering machine (21) are all connected to the filtrate collecting tank (6).

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