Wastewater treatment device for sugar refinery

Abstract

The utility model discloses a sugar refinery wastewater treatment device, which relates to the technical field of wastewater treatment and comprises a water collecting tank, an adjusting tank, an I C anaerobic reactor, an anoxic tank, an aerobic tank, a secondary sedimentation tank and a clean water tank, sugar refinery wastewater enters the water collecting tank through a raw water pipeline, an outlet of the water collecting tank is connected with the adjusting tank, an outlet of the adjusting tank is connected with an inlet of the I C anaerobic reactor, and an outlet of the anoxic tank is connected with an outlet of the secondary sedimentation tank. A water outlet of the I C anaerobic reactor is connected with the anoxic tank, a water outlet of the anoxic tank is connected with a water inlet of the aerobic tank, an outlet of the aerobic tank is connected with the secondary sedimentation tank, and an outlet of the secondary sedimentation tank is connected with the clean water tank. By arranging the I C anaerobic reactor, the mass transfer efficiency of sewage is improved, the sewage treatment efficiency is enhanced, the construction land of the anaerobic tank is reduced, the occupied area of the sewage treatment device is reduced, and the production input cost is saved.

Description

Technical Field

[0001] The utility model relates to the technology of sewage treatment field, in particular to a wastewater treatment device of a sugar factory. Background Art

[0002] Sugar wastewater mainly refers to wastewater containing high concentrations of organic matter, suspended solids and other substances generated during the production process in sugar factories. If it is discharged directly into the environment, it will pose a serious threat to the environment and the health of humans and animals. This is because in addition to high concentrations of difficult-to-decompose organic matter and suspended solids, sugar factory wastewater also contains a large amount of nutrients such as nitrogen and phosphorus. Once these substances enter natural water bodies such as rivers or lakes, they will cause algae to reproduce, leading to eutrophication of water bodies, affecting water quality, forming "blue algae water", which will cause algae and plankton in the water to consume oxygen, causing water bodies to be hypoxic and destroying important ecosystems.

[0003] At present, common sugar wastewater treatment technologies mainly include biochemical treatment, physical and chemical treatment, membrane treatment, plasma treatment, etc. Among them, biochemical treatment refers to the degradation of organic matter into inorganic matter through microbial metabolism, and finally the treatment of wastewater. Biochemical treatment is generally divided into aerobic and anaerobic.

[0004] Aerobic treatment mainly utilizes oxidation under aerobic conditions to convert organic matter and inorganic substances such as nitrogen and phosphorus in wastewater into carbon dioxide, water and ammonia nitrogen to achieve the treatment effect. The wastewater treated by aerobic method has good water quality, and nutrients such as nitrogen and phosphorus are basically eliminated, but it consumes more energy.

[0005] Anaerobic treatment refers to the use of anaerobic bacteria to decompose organic matter in an oxygen-free environment, and can also remove nutrients such as nitrogen and phosphorus. Anaerobic treatment can effectively utilize energy and reduce treatment costs. However, for the degradation of organic matter, certain technical guarantees are required, and the operation requirements are relatively high.

[0006] Chinese patent, application number 2021200609655 discloses a device for recycling water discharged from the end of sugar production. The application obtains recycled water that meets the emission standards by sequentially treating the wastewater discharged from the sugar factory in an anaerobic tank, an aeration tank, and secondary sedimentation for recycling. The characteristic of the anaerobic tank is that it does not require power, has low operating energy consumption, and can treat sewage by itself without external power. However, the characteristics of the anaerobic tank also bring certain problems. The mass transfer efficiency is low, and the sewage needs to stay in the anaerobic tank for a long time. In the case of large sewage treatment volume, a larger anaerobic tank needs to be built to meet the demand, which brings requirements for construction site space and construction costs. Utility Model Content

[0007] In view of this, the utility model aims to solve the deficiencies in the prior art, and its main purpose is to provide a wastewater treatment device for a sugar factory, which solves the problems of long wastewater treatment cycle and large construction site area in traditional anaerobic tanks.

[0008] To achieve the above-mentioned purpose, the utility model adopts the following technical scheme: a sugar factory wastewater treatment device, including a water collection tank, a regulating tank, an IC anaerobic reactor, an anoxic tank, an aerobic tank, a secondary sedimentation tank and a clear water tank. The wastewater from the sugar factory enters the water collection tank through a raw water pipeline. The outlet of the water collection tank is connected to the regulating tank, the outlet of the regulating tank is connected to the inlet of the IC anaerobic reactor, the water outlet of the IC anaerobic reactor is connected to the anoxic tank, the water outlet of the anoxic tank is connected to the water inlet of the aerobic tank, the outlet of the aerobic tank is connected to the secondary sedimentation tank, and the outlet of the secondary sedimentation tank is connected to the clear water tank.

[0009] Furthermore, a deodorizing device is connected to the top of the IC anaerobic reactor.

[0010] Furthermore, the deodorizing device comprises a deodorizing tower, an alkali solution injection device, and an alkali solution circulation pump, wherein the inlet of the alkali solution circulation pump is connected to the bottom of the deodorizing tower, and the outlet of the alkali solution circulation pump is connected to the upper part of the deodorizing tower.

[0011] Furthermore, an induced draft fan is installed in the pipeline between the top of the IC anaerobic reactor and the deodorization device.

[0012] Furthermore, the top of the IC anaerobic reactor is connected to a biogas desulfurization system, and the biogas desulfurization system includes a water seal, a desulfurization tower and a flare.

[0013] Furthermore, the top of the IC anaerobic reactor is connected to a water seal, the outlet of the water seal is connected to a desulfurization tower, and the gas phase outlet at the top of the desulfurization tower is connected to a flare system.

[0014] Furthermore, a mixer is provided at the inlet of the IC anaerobic reactor, a first path of the mixer is connected to the outlet of the regulating tank pump, a second path of the mixer is connected to the circulation pipeline, and a third path of the mixer is connected to the inlet of the IC anaerobic reactor. Due to the mixer, the water inside the IC anaerobic reactor is mixed with the wastewater at the outlet of the regulating tank pump through the circulation pipeline, so as to adjust the inlet concentration of the IC anaerobic reactor and improve the operational flexibility of the IC reactor.

[0015] Furthermore, a tee is provided at the front end of the first path of the mixer, the first path of the tee is connected to the regulating tank, the second path of the tee is connected to the mixer, and the third path of the tee is connected to the anoxic tank.

[0016] Furthermore, a circulation pump is provided on the circulation pipeline.

[0017] Furthermore, the inlet pipe of the IC anaerobic reactor is arranged at the lower part of the IC anaerobic reactor, and the outlet pipe of the IC anaerobic reactor is arranged at the upper part of the IC anaerobic reactor.

[0018] Compared with the prior art, the utility model has obvious advantages and beneficial effects. Specifically, it can be seen from the above technical scheme that: 1. By setting up an IC anaerobic reactor, the mass transfer efficiency of sewage is improved and the sewage treatment efficiency is enhanced; 2. The setting of the IC anaerobic reactor reduces the construction land of the anaerobic pool, reduces the floor space for the sewage treatment device, and saves production input costs; 3. The deodorization device arranged on the top of the IC anaerobic reactor reduces the emission of odor during sewage treatment and protects the surrounding environment.

[0019] In order to more clearly illustrate the structural features and functions of the present invention, the present invention is described in detail below in conjunction with the accompanying drawings and specific embodiments. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a schematic diagram of a wastewater treatment device for a sugar factory according to an embodiment of the utility model;

[0021] Figure 2 It is an enlarged view of the biogas desulfurization system at 100 of the embodiment of the utility model;

[0022] Figure 3 It is an enlarged view of the water collection pool at 200 of the embodiment of the utility model;

[0023] Figure 4 It is an enlarged view of the IC anaerobic reactor at 300 of the embodiment of the utility model;

[0024] Figure 5 It is an enlarged view of the deodorizing device at 400 of the embodiment of the utility model;

[0025] Figure 6 It is an enlarged view of the secondary sedimentation tank at 500 of the embodiment of the utility model;

[0026] Figure 7 This utility model embodiment Figure 4 Enlarged view of point F.

[0027] Reference numerals:

[0028] 1 water collection tank; 2 regulating tank; 3IC anaerobic reactor; 4 anoxic tank; 5 aerobic tank; 6 secondary sedimentation tank; 7 clear water tank; 11 raw water pipeline; 12 screen channel; 13 water collection tank pump; 14 overflow pipe; 15 emergency tank; 21 regulating tank pump; 22 dosing device; 31 circulation pipeline; 32 circulation pump; 33 mixer; 34 tee; 35IC water inlet override line; 36 override valve; 37 biogas outlet; 38 odor outlet; 39 deodorization device; 301 deodorization tower; 302 alkali solution injection equipment; 303 alkali solution circulation pump; 304 induced draft fan; 305 biogas desulfurization system; 306 water seal; 307 desulfurization tower; 308 torch; 309 steam-water separator; 51 connecting valve; 52 extraction pipe; 53 extraction pump. DETAILED DESCRIPTION

[0029] In order to make the technical problems, technical solutions and beneficial effects to be solved by the present application more clearly understood, the present application is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present application and are not used to limit the present application.

[0030] It should be noted that when an element is referred to as being "fixed to" or "disposed on" another element, it can be directly on the other element or indirectly on the other element. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or indirectly connected to the other element.

[0031] It should be understood that the terms "length", "width", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present application.

[0032] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the features. In the description of this application, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.

[0033] See also Figures 1 to 7, as shown, the present application provides a wastewater treatment device for a sugar factory, comprising a water collection tank 1, a regulating tank 2, an IC anaerobic reactor 3, an anoxic tank 4, an aerobic tank 5, a secondary sedimentation tank 6 and a clear water tank 7. The wastewater from the sugar factory enters the water collection tank 1 through a raw water pipeline 11, and a screen channel 12 is arranged in front of the water collection tank 1, and the screen channel 12 is used to block the debris entering the water collection tank 1. The wastewater from the sugar factory passes through the raw water pipeline 11, and enters the water collection tank 1 after the debris is removed in the screen channel 12.

[0034] The water inlet of the water collection pool 1 is located in the middle of the water collection pool 1. The water collection pool 1 is used to store wastewater. The water collection pool 1 is designed as an open-mouth design. In order to prevent excessive rainfall on rainy days, the water level of the water collection pool 1 rises too much. An overflow pipe 14 is provided on the top of the water collection pool 1, and the other end of the overflow pipe 14 is connected to an emergency pool 15. The emergency pool 15 is used to store wastewater that cannot be treated by the water collection pool 1.

[0035] The outlet of the water collection tank 1 is connected to the regulating tank 2. The outlet of the water collection tank 1 is provided with a water collection tank pump 13, and the wastewater in the water collection tank 1 passes through the water collection tank pump 13, and is pressurized by the water collection tank pump 13 and then transported to the regulating tank 2.

[0036] The outlet of the regulating tank 2 is connected to the inlet of the IC anaerobic reactor 3, and the inlet of the IC reactor is located at the lower part of the IC reactor. The wastewater in the regulating tank 2 is pressurized by the regulating tank pump 21 and then transported to the inlet of the IC reactor. A dosing device 22 is arranged between the outlet of the regulating tank 2 and the regulating tank pump 21, and the dosing device 22 is used to add sodium hydroxide to adjust the pH value of the wastewater entering the IC anaerobic reactor 3.

[0037] The water inlet mode of the IC anaerobic reactor 3 is bottom-in and top-out. The inlet pipe of the IC anaerobic reactor 3 is arranged at the lower part of the IC anaerobic reactor 3, and the outlet pipe of the IC anaerobic reactor 3 is arranged at the upper part of the IC anaerobic reactor 3. In order to adjust the water quality concentration of the inlet water of the IC anaerobic reactor 3, the IC anaerobic reactor 3 is provided with a circulation pipeline 31, and the circulation pipeline 31 is used to inject the water at the upper part of the IC anaerobic reactor 3 into the lower part, so as to achieve the effect of adjusting the water quality entering the IC anaerobic reactor 3. The circulation pipeline 31 is provided with a circulation pump 32, and the water on the circulation pipeline 31 is made to flow by the pressurization of the circulation pump 32. There are two liquid phase outlets at the upper part of the IC anaerobic reactor 3, which are the circulation outlet and the water outlet of the IC anaerobic reactor 3; the circulation outlet is connected to the circulation pipeline 31, and the water outlet of the IC anaerobic reactor 3 is connected to the anoxic tank 4. The wastewater treated by the IC anaerobic reactor 3 first enters from the inlet at the lower part of the IC anaerobic reactor 3 and reacts in the IC anaerobic reactor 3. After the reaction is completed, the wastewater enters the anoxic tank 4 through the outlet of the IC anaerobic reactor 3 at the upper part of the IC anaerobic reactor 3.

[0038] The inlet of the IC anaerobic reactor 3 is provided with a mixer 33, the first path of the mixer 33 is connected to the outlet of the regulating tank pump 21, the second path of the mixer 33 is connected to the circulation pipeline 31, and the third path of the mixer 33 is connected to the inlet of the IC anaerobic reactor 3. A tee 34 is provided at the front end of the first path of the mixer 33, the first path of the tee 34 is connected to the regulating tank 2, the second path of the tee 34 is connected to the mixer 33, and the third path of the tee 34 is connected to the anoxic tank 4. The third path of the tee 34 is connected to the anoxic tank 4 through an IC water inlet override line 35, the other end of the IC water inlet override line 35 is connected to the anoxic tank 4, and an override valve 36 is provided on the IC water inlet override line 35. Based on the above design, when the processing capacity of the IC anaerobic reactor 3 reaches the saturated state, the override valve 36 of the IC water inlet override line 35 is opened, and the wastewater can enter the anoxic tank 4 through the IC water inlet override line 35 to maintain the normal operation of the IC anaerobic reactor 3.

[0039] The IC anaerobic reactor 3 has two gas phase outlets at the top, which are a biogas outlet 37 and an odor outlet 38, for removing the biogas and odor generated by the IC anaerobic reactor 3 during the reaction process to meet environmental protection requirements. A deodorizing device 39 is connected to the top of the IC anaerobic reactor 3. The odor coming out of the odor outlet 38 at the top of the IC anaerobic reactor 3 enters the deodorizing device 39, and the deodorizing device 39 includes a deodorizing tower 301, an alkali solution injection device 302, and an alkali solution circulation pump 303. An induced draft fan 304 is installed in the pipeline between the top of the IC anaerobic reactor 3 and the deodorizing device 39. Based on this structure, the odor is powered by the induced draft fan 304 and is pressurized and transported to the deodorizing tower 301. The odor is absorbed by the alkali solution inside the deodorizing tower 301, and the fresh alkali solution is injected into the deodorizing tower 301 by the alkali solution injection device 302. The fresh alkali solution injection point is located at the lower part of the deodorizing tower 301. The odor inside the deodorizing tower 301 flows from bottom to top and is in countercurrent contact with the alkali solution. The inlet of the alkali liquid circulation pump 303 is connected to the bottom of the deodorizing tower 301, and the outlet of the alkali liquid circulation pump 303 is connected to the upper part of the deodorizing tower 301. The alkali liquid in the deodorizing tower 301 is extracted from the bottom and injected into the upper part of the deodorizing tower 301 through the alkali liquid circulation pump 303. The alkali liquid flows from top to bottom in the deodorizing tower 301, and forms a countercurrent contact with the odor in the deodorizing tower 301 from bottom to top, so as to achieve a better deodorizing effect. The odor after deodorization by the alkali liquid is discharged at the top of the deodorizing tower 301, so that the gas coming out of the top of the IC anaerobic reactor 3 has no odor, protecting the surrounding environment. The top of the IC anaerobic reactor 3 is connected to a biogas desulfurization system 305, and the biogas desulfurization system 305 includes a water seal 306, a desulfurization tower 307 and a torch 308. A steam-water separator 309 is provided at the top of the IC anaerobic reactor 3, and a biogas outlet 37 is located at the top of the steam-water separator 309. The steam-water separator 309 separates the gas phase and the liquid phase at the top of the IC anaerobic reactor 3, and the biogas comes out from the top of the steam-water separator 309, and the liquid phase flows back to the IC anaerobic reactor 3. The biogas outlet 37 at the top of the IC anaerobic reactor 3 is connected to the water seal 306, and the outlet of the water seal 306 is connected to the desulfurization tower 307, and the gas phase outlet at the top of the desulfurization tower 307 is connected to the flare 308 system. The biogas outlet 37 at the top of the IC anaerobic reactor 3 is connected to the inlet of the water seal 306, and the biogas first enters the water seal 306, and the biogas coming out of the water seal 306 enters the desulfurization tower 307. The biogas treated by the desulfurization tower 307 is discharged from the top of the desulfurization tower 307 and enters the flare 308 system for combustion.

[0040] The water outlet of the IC anaerobic reactor 3 is connected to the anoxic tank 4. The water outlet of the IC anaerobic reactor 3 is connected to the top of the anoxic tank 4. The water outlet of the anoxic tank 4 is connected to the water inlet of the aerobic tank 5. The water outlet of the anoxic tank 4 is arranged at the bottom of the anoxic tank 4 and is connected to the water inlet at the bottom of the aerobic tank 5. The bottom of the anoxic tank 4 is connected to the aerobic tank 5, and a connecting valve 51 is provided at the connecting portion. The connecting valve provided between the water outlet of the anoxic tank 4 and the water inlet of the aerobic tank 5 can be a gate valve or a butterfly valve. In order to allow the water in the anoxic tank 4 and the aerobic tank 5 to mix and reflux. An extraction pipe 52 is provided in the aerobic tank 5, and an extraction pump 53 is installed on the extraction pipe 52. The water in the aerobic tank 5 is sent to the anoxic tank 4 through the extraction pump 53 for reflux.

[0041] The outlet of the aerobic tank 5 is connected to the secondary sedimentation tank 6, and the outlet of the secondary sedimentation tank 6 is connected to the clean water tank 7. The outlet of the aerobic tank 5 is at the upper part of the aerobic tank 5, and the water in the aerobic tank 5 flows out of the outlet of the aerobic tank 5 by overflow and enters the secondary sedimentation tank 6. In order to increase the water quality sedimentation effect of the secondary sedimentation tank, the injection points of the PAC dosing device 61 and the PAM dosing device 62 are arranged on the pipeline between the outlet of the aerobic tank 5 and the inlet of the secondary sedimentation tank 6. The PAC dosing device 61 is used to add coagulant, and the PAM dosing device 62 is used to add flocculant. The water from the outlet of the aerobic tank 5 is treated by sedimentation in the secondary sedimentation tank 6 to obtain clean water that enters the clean water tank 7. The outlet of the secondary sedimentation tank 6 is arranged at the upper part of the secondary sedimentation tank 6, and the water in the secondary sedimentation tank flows into the clean water tank 7 for storage by overflow. Finally, after the clean water in the clean water tank 7 is tested and analyzed to be qualified, the clean water is discharged outside the site.

[0042] The above description is only a preferred embodiment of the present application and is not intended to limit the present application. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present application should be included in the protection scope of the present application.

Claims

1. A sugar factory wastewater treatment device, characterized in that: It includes a water collection tank, a regulating tank, an IC anaerobic reactor, an anoxic tank, an aerobic tank, a secondary sedimentation tank and a clear water tank. The wastewater from the sugar factory enters the water collection tank through a raw water pipeline. The outlet of the water collection tank is connected to the regulating tank, the outlet of the regulating tank is connected to the inlet of the IC anaerobic reactor, the water outlet of the IC anaerobic reactor is connected to the anoxic tank, the water outlet of the anoxic tank is connected to the water inlet of the aerobic tank, the outlet of the aerobic tank is connected to the secondary sedimentation tank, and the outlet of the secondary sedimentation tank is connected to the clear water tank.

2. A sugar factory wastewater treatment device according to claim 1, characterized in that: The top of the IC anaerobic reactor is connected with a deodorizing device.

3. A sugar factory wastewater treatment device according to claim 2, characterized in that: The deodorizing device comprises a deodorizing tower, an alkali solution injection device, and an alkali solution circulation pump. The inlet of the alkali solution circulation pump is connected to the bottom of the deodorizing tower, and the outlet of the alkali solution circulation pump is connected to the upper part of the deodorizing tower.

4. A sugar factory wastewater treatment device according to claim 2, characterized in that: An induced draft fan is installed in the pipeline between the top of the IC anaerobic reactor and the deodorization device.

5. The sugar factory wastewater treatment device according to claim 1, characterized in that: The top of the IC anaerobic reactor is connected to a biogas desulfurization system, and the biogas desulfurization system includes a water seal, a desulfurization tower and a flare.

6. A sugar factory wastewater treatment device according to claim 5, characterized in that: The top of the IC anaerobic reactor is connected to a water seal, the outlet of the water seal is connected to a desulfurization tower, and the gas phase outlet at the top of the desulfurization tower is connected to a flare system.

7. A sugar factory wastewater treatment device according to claim 1, characterized in that: A mixer is provided at the inlet of the IC anaerobic reactor, a first path of the mixer is connected to the outlet of the regulating tank pump, a second path of the mixer is connected to the circulation pipeline, and a third path of the mixer is connected to the inlet of the IC anaerobic reactor.

8. A sugar factory wastewater treatment device according to claim 7, characterized in that: A tee is provided at the front end of the first path of the mixer, the first path of the tee is connected to the regulating tank, the second path of the tee is connected to the mixer, and the third path of the tee is connected to the anoxic tank.

9. A sugar factory wastewater treatment device according to claim 7, characterized in that: A circulation pump is arranged on the circulation pipeline.

10. The sugar factory wastewater treatment device according to claim 1, characterized in that: The inlet pipe of the IC anaerobic reactor is arranged at the lower part of the IC anaerobic reactor, and the outlet pipe of the IC anaerobic reactor is arranged at the upper part of the IC anaerobic reactor.

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