Sewage treatment device and sewage treatment system

Abstract

The utility model provides a sewage treatment device and a sewage treatment system. The sewage treatment device comprises: a hydrolysis acidification pool, which provides an anaerobic environment and is used for receiving sewage and treating the sewage into a first solution; the contact oxidation pond provides an aerobic environment and is used for receiving the first solution and treating the first solution into a second solution; the return pipeline comprises a first pipeline, a second pipeline and a transition pipeline connected with the first pipeline and the second pipeline; the reflux pump is arranged in the contact oxidation tank, is connected with one end, deviating from the transition pipeline, of the first pipeline, and is configured to pump a second solution into the reflux pipeline, so that the second solution flows into the hydrolysis acidification tank through the reflux pipeline; the cleaning device is connected with the end, close to the transition pipeline, of the second pipeline and is configured to release cleaning liquid into the second pipeline so as to clean foreign matter left in the backflow pipeline.

Description

Technical Field

[0001] The present invention relates to sewage treatment technology, and in particular to a sewage treatment device and a sewage treatment system. Background Art

[0002] Wastewater treatment is a key link in environmental protection and water resource recycling. It covers the comprehensive application of physical, chemical and biological treatment technologies for wastewater.

[0003] Taking the tobacco wastewater treatment station as an example, wastewater treatment includes several process stages: in the physical treatment stage, the wastewater is pre-treated by intercepting large particles of suspended solids or other means; in the chemical treatment stage, fine suspended solids and some organic matter are removed through treatment processes including coagulation and flocculation processes, primary flotation, and secondary flotation processes; in the biological treatment stage, organic pollutants in the wastewater are decomposed by microbial metabolism through A / O processes and other means.

[0004] like Figure 1 As shown, the A / O process connects the anaerobic section and the aerobic section in series. The heterotrophic bacteria in the anaerobic tank A' ammonify pollutants such as proteins and fats to release ammonia (NH3, NH4+); under the condition of sufficient oxygen supply in the oxidation tank O', the nitrification of autotrophic bacteria re-oxidizes the free ammonia into NO3-, and then returns to the anaerobic tank A' through reflux control; under the second anaerobic condition, the denitrification of heterotrophic bacteria reduces NO3- to molecular nitrogen (N2), and finally completes the cycle of C, N, and O in the ecology to achieve harmless treatment of sewage.

[0005] In the above-mentioned reflux control process, the related technology places a reflux pump 6' in the oxidation tank O', and transports the sewage from the reflux pump 6' to the tank outlet of the oxidation tank O' through the reflux pipeline 1' and then refluxes to the front anaerobic tank A'. A check valve 2' is installed in the reflux pipeline 1', and the pipeline between the anaerobic tank A' and the check valve 2' often gets clogged, and cleaning the clogged pipeline will cost a lot of manpower and material resources, which increases the cost of the sewage treatment process and reduces the efficiency of sewage treatment. Utility Model Content

[0006] The purpose of the present invention is to provide a sewage treatment device and a sewage treatment system, which aims to solve the problem that during the sewage treatment process, a return pipe is blocked, and clearing the blocked pipe will cost a lot of manpower and material resources, increase the sewage treatment cost, and reduce the sewage treatment efficiency.

[0007] A first aspect of the present disclosure provides a sewage treatment device, comprising: a hydrolysis acidification tank, configured to provide an anaerobic environment for receiving sewage and treating the sewage into a first solution; a contact oxidation tank, configured to provide an aerobic environment for receiving the first solution and treating the first solution into a second solution; a reflux pipeline, comprising a first pipeline, a second pipeline and a transition pipeline connecting the first pipeline and the second pipeline; a reflux pump, disposed in the contact oxidation tank and connected to an end of the first pipeline away from the transition pipeline, configured to pump the second solution into the reflux pipeline so that the second solution flows into the hydrolysis acidification tank through the reflux pipeline; and a cleaning device, connected to an end of the second pipeline close to the transition pipeline, configured to release a cleaning liquid into the second pipeline to clean up foreign matter remaining in the second pipeline.

[0008] In some embodiments of the sewage treatment device, an end of the transition pipe close to the second pipe is higher than an end close to the first pipe; and / or the second pipe includes a downward-inclined pipe section, an end of the downward-inclined pipe section close to the transition pipe is higher than an end of the downward-inclined pipe section away from the transition pipe.

[0009] In some embodiments of the sewage treatment device, the return pipe includes an elbow, and the transition pipe is installed between the first pipe and the second pipe through the elbow.

[0010] In some embodiments of the sewage treatment device, the return pipe includes an observation pipe section having a transparent portion.

[0011] In some embodiments of the sewage treatment device, the observation pipe section includes a transparent steel hose section arranged at one end of the first pipe close to the transition pipe.

[0012] In some embodiments of the sewage treatment device, the cleaning device includes a cleaning pipe connected to the second pipeline and a valve arranged on the cleaning pipe.

[0013] In some embodiments of the sewage treatment device, the second pipe includes a downward-inclined pipe section, an end of the downward-inclined pipe section close to the transition pipe is higher than an end of the downward-inclined pipe section away from the transition pipe, and the cleaning pipe is connected to the downward-inclined pipe section; and / or the liquid outlet direction of the cleaning pipe forms an acute angle with the direction of reflux of the second solution in the second pipe.

[0014] In some embodiments of the sewage treatment device, the sewage treatment device further comprises a detection device, and the valve is configured to open when the detection device detects that the return line is blocked.

[0015] In some embodiments of the sewage treatment device, the sewage treatment device also includes a filtering device, which is connected to an end of the second pipe away from the transition pipe and is configured to filter the second solution flowing through the second pipe or a mixture of the second solution and the cleaning solution.

[0016] A second aspect of the present disclosure provides a sewage treatment system, comprising the sewage treatment device described in the first aspect of the present disclosure.

[0017] Based on the sewage treatment device provided by the present disclosure, a cleaning device is arranged in the reflux pipeline and a cleaning liquid is released into the second pipeline to clean up the foreign matter remaining in the second pipeline. This is beneficial for the foreign matter remaining in the second pipeline to be cleaned up in time during the process of the second solution flowing from the reflux pipeline to the hydrolysis acidification tank, thereby avoiding blockage in the reflux pipeline, which is beneficial for saving labor costs and improving the efficiency of sewage treatment.

[0018] The sewage treatment system of the present disclosure includes the sewage treatment device of the present disclosure, thereby having the advantages of the sewage treatment device of the present disclosure.

[0019] Other features and advantages of the present disclosure will become apparent from the following detailed description of exemplary embodiments of the present disclosure with reference to the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] The drawings described herein are used to provide a further understanding of the present disclosure and constitute a part of the present application. The illustrative embodiments of the present disclosure and their descriptions are used to explain the present disclosure and do not constitute an improper limitation on the present disclosure. In the drawings:

[0021] Figure 1 It is a structural schematic diagram of a sewage treatment system in the prior art;

[0022] Figure 2 It is a structural schematic diagram of a sewage treatment device according to an embodiment of the present disclosure;

[0023] Figure 3 for Figure 2 A schematic structural diagram of a portion of the structure of a sewage treatment device is shown, which shows a cleaning device.

[0024] Figures 1 to 3 In the figure, each reference numeral represents:

[0025] 1', return pipe, 2', check valve, 6', return pump, A', anaerobic tank, O', oxidation tank;

[0026] 1. Reflux pipeline, 11. First pipeline, 12. Second pipeline, 12A. Downward inclined pipe section, 13. Transition pipeline, 14. Elbow, 4. Cleaning device, 41. Cleaning pipe, 42. Valve, 111. Transparent steel wire hose section, 6. Reflux pump, A. Hydrolysis acidification tank, O. Contact oxidation tank. DETAILED DESCRIPTION

[0027] The technical solutions in the embodiments of the present disclosure will be clearly and completely described below in conjunction with the drawings in the embodiments of the present disclosure. Obviously, the described embodiments are only part of the embodiments of the present disclosure, rather than all of the embodiments. The following description of at least one exemplary embodiment is actually only illustrative and is by no means intended to limit the present disclosure and its application or use. Based on the embodiments in the present disclosure, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present disclosure.

[0028] Unless otherwise specifically stated, the relative arrangement of the parts and steps described in these embodiments, numerical expressions and numerical values ​​do not limit the scope of the present disclosure. At the same time, it should be understood that, for ease of description, the sizes of the various parts shown in the drawings are not drawn according to the actual proportional relationship. The technology, methods and equipment known to ordinary technicians in the relevant field may not be discussed in detail, but in appropriate cases, the technology, methods and equipment should be regarded as a part of the authorization specification. In all examples shown and discussed here, any specific value should be interpreted as being merely exemplary, rather than as a limitation. Therefore, other examples of exemplary embodiments may have different values. It should be noted that similar numbers and letters represent similar items in the following drawings, so once an item is defined in one drawing, it does not need to be further discussed in subsequent drawings.

[0029] In the description of the present disclosure, it should be understood that the use of terms such as "first" and "second" to limit components is only for the convenience of distinguishing the corresponding components. Unless otherwise stated, the above terms have no special meaning and therefore cannot be understood as limiting the scope of protection of the present disclosure.

[0030] In the description of the present disclosure, it needs to be understood that the directions or positional relationships indicated by directional words such as "front, back, up, down, left, right", "lateral, vertical, upright, horizontal" and "top, bottom" are usually based on the directions or positional relationships shown in the drawings, and are only for the convenience of describing the present disclosure and simplifying the description. Unless otherwise specified, these directional words do not indicate or imply that the device or element referred to must have a specific orientation or be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the scope of protection of the present disclosure; the directional words "inside and outside" refer to the inside and outside relative to the outline of each component itself.

[0031] In the following description, the terms "left" and "right" correspond to Figure 2 The so-called "rear" and "front" directions correspond to Figure 3 Up and down direction.

[0032] The embodiment of the present disclosure provides a sewage treatment device, including: a hydrolysis acidification tank A, a contact oxidation tank O, a reflux pipeline 1, a reflux pump 6 and a cleaning device 4. The hydrolysis acidification tank A is configured to provide an anaerobic environment for receiving sewage and treating the sewage into a first solution. The anaerobic environment can be formed by heterotrophic bacteria, which can convert insoluble organic matter in sewage into soluble organic matter; hydrolyze suspended pollutants such as starch, fiber, carbohydrates and soluble organic matter into organic acids; decompose macromolecular organic matter into small molecular organic matter, and the dissolved oxygen in the sewage is gradually consumed by heterotrophic bacteria, thereby forming an anaerobic environment (dissolved oxygen content DO≤0.2mg / L). The first solution can be sewage after ammoniation by heterotrophic bacteria. The contact oxidation tank O is configured to provide an aerobic environment for receiving the first solution and treating the first solution into a second solution. The aerobic environment can be achieved by an aeration process, for example, injecting air or pure oxygen into the contact oxidation tank O to increase the dissolved oxygen content in the water body (2mg / L≤DO≤4mg / L). The first solution formed by anaerobic hydrolysis enters the contact oxidation tank O and undergoes nitrification by autotrophic bacteria to form a second solution.

[0033] The reflux pipeline 1 includes a first pipeline 11, a second pipeline 12, and a transition pipeline 13 connecting the first pipeline 11 and the second pipeline 12. The reflux pump 6 is disposed in the contact oxidation tank O and is connected to an end of the first pipeline 11 away from the transition pipeline 13. The reflux pump 6 pumps the second solution into the reflux pipeline 1 so that the second solution flows into the hydrolysis acidification tank A through the reflux pipeline 1.

[0034] The cleaning device 4 is connected to one end of the second pipe 12 close to the transition pipe 13, and is configured to release cleaning liquid into the second pipe 12 to clean the foreign matter remaining in the second pipe 12. The cleaning liquid can be pure water or a solution containing heterotrophic bacteria.

[0035] By arranging a cleaning device 4 in the reflux pipeline 1 and releasing cleaning liquid into the second pipeline 12 to clean up foreign matter remaining in the second pipeline 12, it is beneficial that when the second solution flows from the reflux pipeline 1 to the hydrolysis acidification tank A, foreign matter remaining in the second pipeline 12 is cleaned up in time, thereby avoiding blockage in the reflux pipeline 1, which is beneficial to saving labor costs and improving the efficiency of sewage treatment.

[0036] In some embodiments, the end of the transition duct 13 close to the second duct 12 is higher than the end close to the first duct 11; and / or the second duct 12 includes a downwardly inclined duct section 12A. The end of the downwardly inclined duct section 12A close to the transition duct 13 is higher than the end of the downwardly inclined duct section 12A away from the transition duct 13.

[0037] The transition duct 13 may be, for example, Figure 2 The L-shaped bend shown in FIG. 1 is a pipe having an L-shaped bend, and the bending portion of the L-shaped bend is located on a side close to the second pipe 12. The downwardly inclined pipe section 12A may be, for example, Figure 2 The downwardly inclined straight pipe shown has one end connected to the transition pipe 13 and is lifted relative to the other end through the transition pipe 13, so that the end close to the transition pipe 13 is higher than the other end, so that the second solution can flow downward into the hydrolysis acidification tank A along the downwardly inclined pipe section 12A.

[0038] The downward-inclined pipe section 12A is provided to guide the liquid in the second pipe 12, so that the mixed liquid in the second pipe 12 is discharged downward along the pipe section 12A, which is beneficial to prevent the liquid flowing into the second pipe 12 from flowing back in the direction of the first pipe 11, so that the second solution or the mixed liquid of the second solution and the cleaning liquid flows into the hydrolysis acidification tank A and mixes with the sewage, so as to reduce the ammonia nitrogen content index (NH3-N) in the sewage.

[0039] In some embodiments, the return line 1 includes an elbow 14. The transition pipe 13 is installed between the first pipe 11 and the second pipe 12 through the elbow 14. The elbow 14 can be, for example, a PVC elbow.

[0040] An elbow 14 is provided to connect the transition pipe 13, the first pipe 11 and the second pipe 12, which is conducive to adjusting the installation layout of the pipeline according to the arrangement positions of the hydrolysis acidification tank A and the contact oxidation tank O. The PVC elbow 14 is conducive to effectively guiding the water flow direction and protecting the return pipe 1 from the stress caused by the angle change, which is conducive to increasing the service life of the return pipe 1.

[0041] In some embodiments, the return line 1 includes an observation pipe section having a transparent portion. For example, the observation pipe section includes a transparent steel hose section 111 disposed at one end of the first pipe 11 close to the transition pipe 13 .

[0042] This arrangement facilitates the staff to check the liquid flow in the return pipeline 1 through the observation pipe section with a transparent part, such as the transparent steel wire hose section 111.

[0043] In some embodiments, the cleaning device 4 includes a cleaning pipe 41 connected to the second pipeline 12 and a valve 42 disposed on the cleaning pipe 41. In some embodiments, the cleaning pipe 41 is connected to the down-dip pipe section 12A; and / or the liquid outlet direction of the cleaning pipe 41 forms an acute angle with the direction of the second solution reflux in the second pipeline 12A. The cleaning pipe 41 can be configured as, for example Figure 2 and Figure 3 As shown, it is connected to the downward-inclined pipe section 12A and extends obliquely from the upper right direction to the lower left direction, so as to facilitate guiding the flow direction of the cleaning liquid and prevent the cleaning liquid from flowing into the first pipe 11 and into the contact oxidation tank O with impurities.

[0044] The cleaning device 4 includes a cleaning pipe 41 and a valve 42 arranged on the cleaning pipe 41. It has a simple structure, is easy to manufacture and install, is conducive to cleaning and maintenance of the cleaning device 4, and occupies little space, which is conducive to flexible layout.

[0045] In some embodiments, the sewage treatment device further comprises a detection device. The valve 42 is configured to open when the detection device detects that the return pipe 1 is blocked. The detection device can be, for example, a material flow switch, a pressure sensor, a photoelectric sensor, a laser sensor, etc.

[0046] This arrangement is conducive to timely opening the valve 42 when the return pipe 1 is blocked, realizing automatic detection, which is conducive to improving the anti-blocking performance of the sewage treatment device and reducing labor costs.

[0047] In some embodiments, the sewage treatment device further comprises a filtering device. The filtering device is connected to an end of the second pipe 12 away from the transition pipe 13, and is configured to filter the second solution or the mixture of the second solution and the cleaning solution flowing through the second pipe 12. The filtering device may include, for example, a grid filter, a mesh filter, or a microporous filter, etc.

[0048] This arrangement helps prevent foreign matter in the reflux pipeline 1 from entering the hydrolysis acidification tank A again, and helps avoid the problem of repeated blockage.

[0049] The present disclosure also provides a sewage treatment system, including the sewage treatment device provided by the present disclosure. In some embodiments, the sewage treatment system further includes a disinfection device downstream of the sewage treatment device.

[0050] The following combination Figures 1 to 3 A sewage treatment device according to an embodiment of the present disclosure and a method for treating sewage using the sewage treatment device are described in detail. Figure 2 As shown, the sewage treatment device includes a hydrolysis acidification tank A, a contact oxidation tank O, a reflux pipeline 1, a reflux pump 6, a cleaning device 4, a detection device (not shown) and a filtering device.

[0051] The hydrolysis acidification tank A and the contact oxidation tank O are arranged side by side. The reflux pipeline 1 spans the hydrolysis acidification tank A and the contact oxidation tank O. The reflux pipeline 1 includes a first pipeline 11, a second pipeline 12 and a transition pipeline 13. Among them, the first pipeline 11 is vertically arranged in the contact oxidation tank O, and one end is connected to the reflux pump 6 through a PVC elbow 14, and the other end is provided with a section of transparent steel wire hose 111 and is connected to the transition elbow 13 through the PVC elbow 14. The second pipeline 12 is an L-shaped elbow, which has a first straight pipe section 121, a second straight pipe section 122 and a first elbow section 123 connecting the first straight pipe section 121 and the second straight pipe section 122. The first straight pipe section 121 is set as a downwardly inclined pipe section 12A, and the downwardly inclined pipe section 12A is connected to the transition pipe 13 through the PVC elbow 14. The second straight pipe section 122 is vertically arranged at the upper part of the hydrolysis acidification tank A. The bending angle of the first elbow section 123 is an obtuse angle. The transition pipe 13 is arranged above the contact oxidation tank O and is an L-shaped elbow. The L-shaped elbow has a third straight pipe section 131, a fourth straight pipe section 132, and a second elbow section 133 connecting the third straight pipe section 131 and the fourth straight pipe section 132. The third straight pipe section 131 is arranged horizontally and is connected to the first pipe 11 through the PVC elbow 14. The fourth straight pipe section 132 is arranged vertically and is connected to the second pipe 12 through the PVC elbow 14. The bending angle of the second elbow section 133 is a right angle, and the third elbow section 133 is arranged close to the second pipe 12. Figure 3 As shown, the return pipelines 1 are aligned in the front-to-back direction, which shortens the length of the return pipelines 1 and helps reduce the space occupied by the return pipelines 1 .

[0052] The cleaning device 4 includes a cleaning pipe 41 and a valve 42. The cleaning pipe 41 is a straight pipe and is installed obliquely from the upper right to the lower left on the down-sloping pipe section 12A. The valve 42 is arranged on the cleaning pipe 41 and is connected to the detection device signal. When the detection device detects a blockage in the down-sloping pipe section 12A, the valve 42 opens. The filtering device is connected to the second straight pipe section 122 to filter the second solution or the mixed liquid discharged from the second straight pipe section 122.

[0053] The following is a detailed description of the method for sewage treatment by sewage treatment equipment:

[0054] The sewage is first discharged into the hydrolysis acidification tank A, where the suspended pollutants such as starch, fiber, carbohydrates and soluble organic matter in the sewage are hydrolyzed into organic acids, macromolecular organic matter is decomposed into small molecular organic matter, and insoluble organic matter is converted into soluble organic matter. At this stage, the sewage is treated into the first solution. The first solution is then passed into the contact oxidation tank O for aerobic treatment to improve the biodegradability of the first solution. Under sufficient oxygen supply conditions, the free ammonia (NH3, NH4+, etc.) in the first solution is oxidized to NO3- through nitrification. In the contact oxidation tank O, the first solution is treated into the second solution.

[0055] The reflux pump 6 transports the second solution to the reflux pipeline 1, and the second solution is discharged to the hydrolysis acidification tank A through the reflux pipeline 1. NO3- in the second solution returned to the A tank is reduced to molecular nitrogen (N2) by denitrification under anaerobic conditions, thereby achieving harmless treatment of sewage.

[0056] During the sewage treatment process, the detection device monitors the blockage condition in the return pipe 1 in real time. When the detection device detects that there is foreign matter blocking the return pipe 1, it transmits a signal to the valve 42, and the valve opens after receiving the signal, so that the cleaning liquid (for example, water) flushes the inside of the return pipe 1, and the foreign matter is discharged downward along the downward pipe section 12A, and the foreign matter is filtered out by the filtering device.

[0057] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the present disclosure rather than to limit it. Although the present disclosure has been described in detail with reference to the preferred embodiments, ordinary technicians in the relevant field should understand that the specific implementation methods of the present disclosure can still be modified or some technical features can be replaced by equivalents, which should all be included in the scope of the technical solution for protection requested by the present disclosure.

Claims

1. A sewage treatment device, characterized in that: include: A hydrolysis acidification tank (A) is configured to provide an anaerobic environment, for receiving sewage and treating the sewage into a first solution; a contact oxidation tank (O), configured to provide an aerobic environment, for receiving the first solution and treating the first solution into a second solution; A return pipeline (1) comprising a first pipeline (11), a second pipeline (12) and a transition pipeline (13) connecting the first pipeline (11) and the second pipeline (12); a reflux pump (6), disposed in the contact oxidation tank (O) and connected to an end of the first pipeline (11) away from the transition pipeline (13), and configured to pump the second solution into the reflux pipeline (1) so that the second solution flows into the hydrolysis acidification tank (A) through the reflux pipeline (1); and A cleaning device (4), the cleaning device (4) is connected to one end of the second pipe (12) close to the transition pipe (13), and is configured to release cleaning liquid into the second pipe (12) to clean foreign matter remaining in the second pipe (12).

2. The sewage treatment device according to claim 1, characterized in that: An end of the transition duct (13) close to the second duct (12) is higher than an end close to the first duct (11); and / or The second pipeline (12) comprises a downwardly inclined pipeline section (12A), wherein an end of the downwardly inclined pipeline section (12A) close to the transition pipeline (13) is higher than an end of the downwardly inclined pipeline section (12A) far from the transition pipeline (13).

3. The sewage treatment device according to claim 2, characterized in that: The return pipeline (1) comprises an elbow (14), and the transition pipeline (13) is installed between the first pipeline (11) and the second pipeline (12) through the elbow (14).

4. The sewage treatment device according to any one of claims 1 to 3, characterized in that: The return line (1) comprises an observation pipe section having a transparent portion.

5. The sewage treatment device according to claim 4, characterized in that: The observation pipe section comprises a transparent steel hose section (111) arranged at one end of the first pipe (11) close to the transition pipe (13).

6. The sewage treatment device according to any one of claims 1 to 3, characterized in that: The cleaning device (4) comprises a cleaning pipe (41) connected to the second pipeline (12) and a valve (42) arranged on the cleaning pipe (41).

7. The sewage treatment device according to claim 6, characterized in that: The second pipeline (12) comprises a downwardly inclined pipe section (12A), an end of the downwardly inclined pipe section (12A) close to the transition pipe (13) is higher than an end of the downwardly inclined pipe section (12A) away from the transition pipe (13), and the cleaning pipe (41) is connected to the downwardly inclined pipe section (12A); and / or The liquid outlet direction of the cleaning pipe (41) and the reflux direction of the second solution in the second pipe (12) form an acute angle.

8. The sewage treatment device according to claim 6, characterized in that: A detection device is also included, and the valve (42) is configured to open when the detection device detects that the return line (1) is blocked.

9. The sewage treatment device according to any one of claims 1 to 3, characterized in that: It also includes a filtering device, which is connected to an end of the second pipe (12) away from the transition pipe (13) and is configured to filter the second solution flowing through the second pipe (12) or a mixture of the second solution and the cleaning solution.

10. A sewage treatment system, characterized in that: A sewage treatment device comprising any one of claims 1-9.

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