CN115779505B - Sewage treatment system and treatment method - Google Patents

Sewage treatment system and treatment method Download PDF

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Publication number
CN115779505B
CN115779505B CN202211476524.9A CN202211476524A CN115779505B CN 115779505 B CN115779505 B CN 115779505B CN 202211476524 A CN202211476524 A CN 202211476524A CN 115779505 B CN115779505 B CN 115779505B
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sewage
tank
mud
slurry
conveying
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CN115779505A (en
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刘桔昌
罗亦坤
黄泽伟
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Guangzhou Longyue Environmental Protection Machinery Equipment Co ltd
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Guangzhou Longyue Environmental Protection Machinery Equipment Co ltd
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Abstract

The invention discloses a sewage treatment system and a sewage treatment method, wherein the sewage treatment method comprises the following steps: the sewage is conveyed to a first sewage tank through a sewage conveying assembly; when the sewage concentration at the upper part in the first sewage tank reaches a set threshold value, cutting off a conveying channel between the sewage conveying assembly and the first sewage tank, and opening the conveying channel between the sewage conveying assembly and the second sewage tank; the sewage is conveyed to a second sewage tank through a sewage conveying assembly; when the sewage concentration at the upper part in the second sewage tank reaches a set threshold value, cutting off a conveying channel between the sewage conveying assembly and the second sewage tank, and opening the conveying channel between the sewage conveying assembly and the first sewage tank; and sequentially circulating the first sewage tank and the second sewage tank until the treatment of all sewage is realized. The invention does not need to add medicament in the sewage treatment process, does not pollute the environment, and can improve the sewage treatment efficiency.

Description

Sewage treatment system and treatment method
Technical Field
The invention relates to the field of sewage treatment, in particular to a sewage treatment system and a sewage treatment method.
Background
In a sewage treatment system, it is generally required to convey sewage into a sewage tank, and simultaneously add a chemical (such as a flocculant) into the sewage tank, and after the sewage is fully mixed with the chemical in the sewage tank and reacted, sludge is precipitated to the bottom of the sewage tank, and clear water flows to the upper part of the sewage tank. And then discharging the clear water at the upper part of the sewage tank to the clear water tank, and conveying the sludge at the bottom of the sewage tank to the next process for the next treatment.
However, in the process of implementing the present invention, the inventors have found that the following problems exist in the prior art: in order to accelerate the sedimentation time and improve the sewage treatment efficiency, the medicament is added into the sewage. However, the cost of sewage treatment is increased after the medicament is added, and the medicament causes certain pollution to the environment. The chemical added into the sewage can remain in the treated clean water, and the quality of the finished sand can be polluted when the clean water is reused for sand washing.
Disclosure of Invention
The invention aims to provide a sewage treatment system and a sewage treatment method, wherein the sewage treatment system and the sewage treatment method do not need to add medicines in the sewage treatment process, cannot pollute the environment, cannot leave medicines in the treated clean water, and can improve the sewage treatment efficiency.
The technical scheme is as follows:
in one embodiment, a method for treating wastewater is disclosed.
The sewage treatment method comprises the following steps:
the sewage is conveyed to a first sewage tank through a sewage conveying assembly;
when the sewage concentration at the upper part in the first sewage tank reaches a set threshold value, cutting off a conveying channel between the sewage conveying assembly and the first sewage tank, and opening the conveying channel between the sewage conveying assembly and the second sewage tank;
the sewage is conveyed to a second sewage tank through a sewage conveying assembly;
when the sewage concentration at the upper part in the second sewage tank reaches a set threshold value, cutting off a conveying channel between the sewage conveying assembly and the second sewage tank, and opening the conveying channel between the sewage conveying assembly and the first sewage tank;
and sequentially circulating the first sewage tank and the second sewage tank until the treatment of all sewage is realized.
In one embodiment, after the sewage is delivered to the first sewage tank by the sewage delivery assembly, the method further comprises:
detecting the concentration of the slurry at the bottom of the first sewage tank, and conveying the slurry at the bottom of the first sewage tank to the slurry tank through the first slurry conveying assembly after the detected concentration of the slurry reaches a set threshold value;
when the liquid level in the mud tank reaches a specified position, suspending the transmission of mud in the first sewage tank to the mud tank;
after the sewage is conveyed to the second sewage tank through the sewage conveying assembly, the sewage treatment device further comprises:
detecting the concentration of the slurry at the bottom of the second sewage tank, and conveying the slurry at the bottom of the second sewage tank to the slurry tank through the second slurry conveying assembly after the detected concentration of the slurry reaches a set threshold value;
and suspending the transportation of the slurry in the second sewage tank to the slurry tank after the detected liquid level in the slurry tank reaches the designated position.
In one embodiment, the slurry at the bottom of the first sewage tank is conveyed to the slurry tank by the first slurry conveying assembly, specifically:
automatically flowing the mud at the bottom of the first sewage tank to the mud tank by utilizing water pressure through the first mud conveying assembly;
when the self-flowing flow is insufficient, a first mud transfer pump of the first mud conveying assembly is started, and mud at the bottom of the first sewage tank is conveyed to the mud tank through the first mud transfer pump;
the mud at the bottom of the second sewage tank is conveyed to the mud tank through the second mud conveying assembly, and the mud conveying assembly specifically comprises:
automatically flowing the slurry at the bottom of the second sewage tank to the slurry tank by utilizing water pressure through the second slurry conveying assembly;
when the self-flowing flow is insufficient, a second slurry transfer pump of the second slurry conveying assembly is started, and the slurry at the bottom of the second sewage tank is conveyed to the slurry tank through the second slurry transfer pump.
In an embodiment, further comprising:
starting a grouting pump while suspending the slurry in the first sewage tank from being conveyed to the slurry tank, and conveying the slurry in the slurry tank to a filter press for filtering and dewatering through the grouting pump and a slurry conveying pipeline; when the liquid level in the mud tank drops to a designated position, conveying the mud in the first sewage tank to the mud tank again, and sequentially circulating;
starting a grouting pump while suspending the slurry in the second sewage tank from being conveyed to the slurry tank, and conveying the slurry in the slurry tank to a filter press for filtering and dewatering through the grouting pump and the slurry conveying assembly; and after the liquid level in the mud tank is lowered to a designated position, conveying the mud in the second sewage tank to the mud tank again, and sequentially circulating.
In an embodiment, further comprising:
after the sewage is conveyed to the first sewage tank through the sewage conveying assembly, mud is precipitated to the bottom of the first sewage tank, and clear water flows to the upper part of the first sewage tank and flows into the clear water tank;
after the sewage is conveyed to the second sewage tank through the sewage conveying assembly, mud is precipitated to the bottom of the second sewage tank, and clear water flows to the upper part of the second sewage tank and flows into the clear water tank;
when the grouting pump stops running, a back flushing pump is started, the back flushing pump conveys clear water in a clear water tank to annular water pipes at the tops of the first sewage tank and the second sewage tank through back flushing pipelines, and conveys clear water to the first mud conveying assembly and the second mud conveying assembly for flushing through the annular water pipes, and the flushed sewage is conveyed to a transfer tank; sewage in the transfer pond can be conveyed to the first sewage tank or the second sewage tank through the sewage conveying assembly for sewage treatment.
In one embodiment, when the sewage concentration of the upper part in the first sewage tank/the second sewage tank is detected to be more than 100mg/L, a conveying channel between the sewage conveying assembly and the first sewage tank/the second sewage tank is cut off; and when the concentration of the slurry at the bottom of the first sewage tank/the second sewage tank is detected to be more than or equal to 20%, conveying the slurry in the first sewage tank/the second sewage tank to the slurry tank.
In another embodiment, a wastewater treatment system is disclosed.
The sewage treatment system comprises a first sewage tank, a second sewage tank and a sewage conveying assembly, wherein the sewage conveying assembly comprises a slurry pump, a main sewage conveying pipe connected with the slurry pump, and two branch sewage conveying pipes connected with the main sewage conveying pipe, the water inlet end of the slurry pump is communicated with the interior of a transfer tank through a sewage inlet pipe, sewage is contained in the transfer tank, the water outlet ends of the two branch sewage conveying pipes are respectively arranged on the upper sides of the interior of the first sewage tank and the second sewage tank, first pneumatic ball valves are respectively arranged on the two branch sewage conveying pipes, and sewage concentration detectors are respectively arranged on the upper sides of the interior of the first sewage tank and the second sewage tank.
In an embodiment, the device further comprises a mud tank, a first mud conveying assembly and a second mud conveying assembly, wherein mud concentration detectors are respectively arranged at the lower parts of the inner sides of the first and second sewage tanks, the first mud conveying assembly comprises a first mud transfer pump and a first mud conveying pipe, and the first mud transfer pump conveys mud at the bottom of the first sewage tank to the mud tank through the first mud conveying pipe; the second slurry conveying assembly comprises a second slurry transfer pump and a second slurry conveying pipe, and the second slurry transfer pump conveys slurry at the bottom of the second sewage tank to the slurry tank through the second slurry conveying pipe; the upper part of the inner side of the mud tank is provided with a liquid level sensor.
In one embodiment, the sewage treatment device further comprises a clean water tank, a backwash pump, a backwash conveying main pipe and at least two backwash conveying branch pipes, wherein overflow tanks at the upper parts of the first sewage tank and the second sewage tank are respectively communicated with the interior of the clean water tank through clean water pipes, a water inlet of the backwash pump is communicated with the interior of the clean water tank, a water outlet of the backwash pump is connected with the backwash conveying main pipe, the two backwash conveying branch pipes are connected with the backwash conveying branch pipes, the two backwash conveying branch pipes are respectively communicated with annular water pipes at the tops of the first sewage tank and the second sewage tank, and the two annular water pipes are respectively communicated with the first mud conveying pipe and the second mud conveying pipe; the two ends of the first mud conveying pipe are respectively provided with a second pneumatic ball valve, the two ends of the second mud conveying pipe are respectively provided with a third pneumatic ball valve, the upper parts of the first mud conveying pipe and the second mud conveying pipe are respectively connected with a return pipe communicated with the transfer pool, and the return pipe is provided with a fourth pneumatic ball valve.
In an embodiment, the tops of the first sewage tank and the second sewage tank are provided with water guide tanks, a steady flow barrel is arranged below the water guide tanks, sewage is tangent to the steady flow barrel through the water guide tanks, cone structures are fixed in the middle of the bottoms of the inner sides of the first sewage tank and the second sewage tank, the main bodies of the first sewage tank and the second sewage tank are of straight barrel structures, horizontal bottom plates are fixed at the bottoms of the first sewage tank and the second sewage tank, and the cone structures are fixed on the horizontal bottom plates; the bottom outlet of the mud tank is connected with the filter press through a grouting pump and a mud conveying component.
The advantages and principles of the invention are described below:
when the sewage treatment system disclosed by the invention is used for sewage treatment, sewage is firstly conveyed into the first sewage tank, and the sewage is subjected to precipitation treatment in the first sewage tank. In the process of carrying out sewage precipitation treatment on the first sewage tank, detecting the sewage concentration rising from the upper part of the inner side of the first sewage tank through a sewage concentration detector, and switching and conveying sewage to the second sewage tank for precipitation treatment when the sewage concentration in the first sewage tank reaches a set threshold value. The sewage concentration detector is used for controlling the sewage concentration in the first sewage tank and the second sewage tank, so that the sewage treatment effect is ensured. The sewage is alternately treated by switching the first sewage tank and the second sewage tank, so that the sewage treatment efficiency can be improved even if no reagent is added in the sewage treatment process, and meanwhile, the environment cannot be polluted by the addition of the reagent, so that the reagent cannot be remained in the treated clean water, and the quality of finished sand cannot be polluted when the treated clean water is recycled for sand washing. The first sewage tank and the second sewage tank are alternately switched to treat sewage, and static natural precipitation is performed to accelerate precipitation. Compared with a sewage tank for continuously conveying sewage for sewage treatment, the sewage tank has the advantages that the sewage tank is free from disturbance of water flow during static sedimentation, and the sedimentation efficiency is higher.
Drawings
FIG. 1 is a general flow chart of a wastewater treatment process;
FIG. 2 is a schematic diagram of a sewage treatment system;
fig. 3 is a bottom view of the first sewage tank;
FIG. 4 is a top view of the first sewage tank;
reference numerals illustrate:
1. a first sewage tank; 2. a second sewage tank; 3. a mud tank; 4. a slurry pump; 5. a sewage delivery main pipe; 6. a sewage delivery branch pipe; 7. a transfer pool; 8. a first pneumatic ball valve; 9. a sewage concentration detector; 10. a water guide groove; 11. steady flow bucket; 12. an overflow tank; 13. a cone structure; 14. a mud concentration detector; 15. a first mud transfer pump; 16. a first slurry delivery pipe; 17. a second slurry transfer pump; 18. a second slurry delivery pipe; 19. a liquid level sensor; 20. a clean water tank; 21. a backwash pump; 22. back flushing the conveying main pipe; 23. back flushing the conveying branch pipe; 24. a second pneumatic ball valve; 25. a third pneumatic ball valve; 26. a return pipe; 27. and a fourth pneumatic ball valve.
Detailed Description
In the description of the present invention, it should be understood that the terms "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "middle," "inner," and the like indicate orientations or positional relationships based on the orientation or positional relationships shown in the drawings, merely to facilitate description of the present invention and simplify the description, and do not indicate or imply that the devices or elements referred to must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first", "a second", etc. may explicitly or implicitly include one or more such feature. In the description of the present invention, it should be noted that, unless explicitly specified and limited otherwise, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be either fixedly connected, detachably connected, or integrally connected, for example; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present invention can be understood by those of ordinary skill in the art in a specific case.
The preferred embodiments of the present invention will be described in detail below with reference to the accompanying drawings so that the advantages and features of the present invention can be more easily understood by those skilled in the art, thereby making clear and defining the scope of the present invention.
As shown in fig. 1, the present invention discloses a sewage treatment method in an embodiment.
The sewage treatment method comprises the following steps:
s1: the sewage is transported to the first sewage tank 1 by the sewage transport assembly.
The sewage is contained in the transfer pond 7, and the sewage conveying assembly comprises a slurry pump 4, a main sewage conveying pipe 5 and two branch sewage conveying pipes 6. The water inlet end of the slurry pump 4 is communicated with the interior of the transfer tank 7 through a sewage inlet pipe, the sewage conveying main pipe 5 is connected with the water outlet end of the slurry pump 4, and the two sewage conveying branch pipes 6 are respectively connected with the sewage conveying main pipe 5. One of the sewage conveying branch pipes 6 is arranged at the upper part of the inner side of the first sewage tank 1, and the two sewage conveying branch pipes 6 are provided with first pneumatic ball valves 8.
The slurry pump 4 is started, and simultaneously, the first pneumatic ball valve 8 on the sewage conveying branch pipe 6 communicated with the first sewage tank 1 is started, sewage is conveyed to the main sewage conveying pipe 5 through the slurry pump 4, and then is conveyed to the first sewage tank 1 through the sewage conveying branch pipe 6 for sedimentation treatment. After sewage enters the first sewage tank 1, fixed particles such as suspended matters are precipitated to the bottom of the first sewage tank 1, and the sewage rises in the cylinder body of the first sewage tank 1.
S2: when the sewage concentration at the upper part in the first sewage tank 1 reaches a set threshold value, a conveying channel between the sewage conveying assembly and the first sewage tank 1 is cut off, and a conveying channel between the sewage conveying assembly and the second sewage tank 2 is opened.
S3: the sewage is transported to the second sewage tank 2 by the sewage transporting assembly.
The upper part of the inner side of the first sewage tank 1 is provided with a sewage concentration detector 9. The rising sewage concentration is detected by the sewage concentration detector 9 in the rising process of the sewage, when the sewage concentration reaches more than 100mg/L, the first pneumatic ball valve 8 on the sewage conveying branch pipe 6 communicated with the interior of the first sewage tank 1 is closed, so that the conveying channel for conveying the sewage to the first sewage tank 1 is cut off, and the sewage cannot be conveyed into the first sewage tank 1.
Another sewage delivery branch pipe 6 is disposed at an upper inner portion of the second sewage tank 2. The first pneumatic ball valve 8 placed on the sewage delivery manifold 6 at the upper inner side of the second sewage tank 2 is opened while cutting off the delivery passage between the sewage delivery assembly and the first sewage tank 1. The sewage in the transfer tank 7 is conveyed into the second sewage tank 2 through the slurry pump 4 and the other sewage conveying branch pipe 6.
S4: when the sewage concentration at the upper part in the second sewage tank 2 reaches the set threshold value, the conveying channel between the sewage conveying assembly and the second sewage tank 2 is cut off, and the conveying channel between the sewage conveying assembly and the first sewage tank 1 is opened.
After the sewage enters the second sewage tank 2, fixed particles such as suspended matters are precipitated to the bottom of the second sewage tank 2, and the sewage rises in the barrel body of the second sewage tank 2. The upper part of the inner side of the second sewage tank 2 is provided with a sewage concentration detector 9, the sewage concentration detector 9 is used for detecting the rising sewage concentration in the process of rising sewage, when the sewage concentration reaches more than 100mg/L, the first pneumatic ball valve 8 on the sewage conveying branch pipe 6 communicated with the interior of the second sewage tank 2 is closed, so that the conveying channel for conveying sewage to the second sewage tank 2 is cut off, and the sewage cannot be conveyed to the second sewage tank 2.
S5: and the sewage is sequentially circulated between the first sewage tank 1 and the second sewage tank 2 until the treatment of all sewage is realized.
The conveying channel for conveying the sewage to the first sewage tank 1 is started while the conveying channel for conveying the sewage to the second sewage tank 2 is cut off, and the sewage is conveyed to the first sewage tank 1, so that the switching treatment of the sewage between the first sewage tank 1 and the second sewage tank 2 is realized.
In this embodiment, when sewage treatment is performed, sewage is first conveyed into the first sewage tank 1, and the sewage is subjected to precipitation treatment in the first sewage tank 1. In the process of carrying out sedimentation treatment on sewage in the first sewage tank 1, the sewage concentration rising from the upper part of the inner side of the first sewage tank 1 is detected by the sewage concentration detector 9, and when the sewage concentration in the first sewage tank 1 reaches a set threshold value, the sewage is switched and conveyed into the second sewage tank 2 for sedimentation treatment. In the embodiment, the sewage concentration in the first sewage tank 1 and the second sewage tank 2 is controlled by the sewage concentration detector 9, so that the sewage treatment effect is ensured. The sewage is alternately switched and treated through the first sewage tank 1 and the second sewage tank 2, so that the sewage treatment efficiency can be improved even if no reagent is added in the sewage treatment process, and meanwhile, the environment cannot be polluted even if no reagent is added, so that no reagent remains in the treated clean water, and the quality of finished sand cannot be polluted when the treated clean water is recycled for sand washing. The first sewage tank 1 and the second sewage tank 2 are alternately switched to treat sewage, static and natural sedimentation is performed, and sedimentation can be accelerated. Compared with a sewage tank for continuously conveying sewage for sewage treatment, the sewage tank for sewage treatment has the advantages that the sewage tank for sewage treatment does not have disturbance of water flow during static sedimentation, and the sedimentation efficiency is higher.
Further, after the sewage is transferred to the first sewage tank 1 by the sewage transfer assembly, it further includes:
and detecting the concentration of the slurry at the bottom of the first sewage tank 1, and conveying the slurry at the bottom of the first sewage tank 1 to the slurry tank 3 through the first slurry conveying assembly after the detected concentration of the slurry reaches a set threshold value.
Wherein, when the mud at the bottom of the first sewage tank 1 is conveyed to the mud tank 3 through the first mud conveying component, specifically:
automatically flowing the mud at the bottom of the first sewage tank 1 to the mud tank 3 by using water pressure through the first mud conveying assembly;
when the self-flowing flow is insufficient, the first mud transfer of the first mud conveying assembly is started, and the mud at the bottom of the first sewage tank 1 is conveyed to the mud tank 3 through the first mud transfer pump 15.
In this embodiment, a mud concentration detector 14 is provided at the bottom of the inner side of the first sewage tank 1. The mud concentration at the bottom of the first sewage tank 1 can be detected by the mud concentration detector 14. When the mud concentration of the bottom of the first sewage tank 1 detected by the mud concentration detector 14 is greater than or equal to 20%, the mud at the bottom of the first sewage tank 1 is conveyed to the mud tank 3.
The first slurry conveying assembly comprises a first slurry transfer pump 15 and a first slurry conveying pipe 16, and the first slurry transfer pump 15 can convey slurry at the bottom of the first sewage tank 1 into the slurry tank 3 through the first slurry conveying pipe 16. In order to improve the conveying efficiency of the slurry, two first slurry conveying assemblies are provided in this embodiment, and the slurry at the bottom of the first sewage tank 1 is conveyed into the slurry tank 3 through the two first slurry conveying assemblies.
In this embodiment, the height of the first sewage tank 1 may be set to be higher than the height of the mud tank 3, and when the mud is conveyed, the mud is conveyed by using the height difference first, and when the gravity flow of the conveyed mud is not smooth, the first mud transfer pump 15 is started to perform forced conveyance of the mud. According to the embodiment, the power consumption can be greatly saved by the slurry conveying mode.
When it is detected that the liquid level in the mud tank 3 reaches a specified position, the conveyance of mud in the first sewage tank 1 to the mud tank 3 is suspended. In this embodiment, a liquid level sensor 19 is disposed at the upper part of the inner side of the mud tank 3, and when the liquid level sensor 19 detects that the liquid level reaches a specified position, the first mud transfer pumps 15 of the two first mud conveying components stop running. Simultaneously, a grouting pump is started, and the slurry in the slurry tank 3 is conveyed to a filter press for filtering and dewatering through the grouting pump and a slurry conveying pipeline. When the liquid level in the mud tank 3 drops to a specified position, the first mud transfer pump 15 is started again, and the circulation is completed.
After the sewage is conveyed to the second sewage tank 2 by the sewage conveying assembly, the sewage treatment device further comprises:
and detecting the concentration of the slurry at the bottom of the second sewage tank 2, and conveying the slurry at the bottom of the second sewage tank 2 to the slurry tank 3 through the second slurry conveying assembly after the detected concentration of the slurry reaches a set threshold value.
Wherein, at the mud that passes through second mud conveying subassembly and carries second sewage tank 2 bottom to mud jar 3, specifically include:
automatically flowing the slurry at the bottom of the second sewage tank 2 to the slurry tank 3 by using water pressure through the second slurry conveying assembly;
when the self-flowing flow rate is insufficient, the second mud transfer pump 17 of the second mud conveying assembly is started, and the mud at the bottom of the second sewage tank 2 is conveyed to the mud tank 3 through the second mud transfer pump 17.
In this embodiment, a mud concentration detector 14 is provided at the bottom of the inner side of the second sewage tank 2. The mud concentration at the bottom of the second sewage tank 2 can be detected by the mud concentration detector 14. When the mud concentration at the bottom of the second sewage tank 2 detected by the mud concentration detector 14 is 20% or more, the mud in the second sewage tank 2 is conveyed to the mud tank 3. The second slurry conveying assembly comprises a second slurry transfer pump 17 and a second slurry conveying pipe 18, and the second slurry transfer pump 17 conveys slurry at the bottom of the second sewage tank 2 into the slurry tank 3 through the second slurry conveying pipe 18. In order to improve the conveying efficiency of the slurry, two second slurry conveying assemblies are provided in this embodiment, and the slurry at the bottom of the first sewage tank 1 is conveyed into the slurry tank 3 through the two second slurry conveying assemblies.
In this embodiment, the height of the second sewage tank 2 may be set to be higher than the height of the mud tank 3, and when the mud is conveyed, the mud is conveyed by the height difference first, and when the gravity flow of the conveyed mud is not smooth, the second mud transfer pump 17 is started to perform forced conveyance of the mud. According to the embodiment, the power consumption can be greatly saved by the slurry conveying mode.
When it is detected that the liquid level in the mud tank 3 reaches the specified position, the conveyance of mud in the second sewage tank 2 to the mud tank 3 is suspended. Simultaneously, a grouting pump is started, and the slurry in the slurry tank 3 is conveyed to a filter press for filtering and dewatering through the grouting pump and a slurry conveying pipeline. When the liquid level in the mud tank 3 drops to a specified position, the second mud transfer pump 17 is started again, and the circulation is completed.
After sewage is conveyed to the first sewage tank 1 through the sewage conveying assembly, mud is precipitated to the bottom of the first sewage tank 1, and clear water flows to the upper part of the first sewage tank 1 and flows into the clear water tank 20 for storage. Similarly, after sewage is transferred to the second sewage tank 2 by the sewage transfer assembly, mud is deposited to the bottom of the second sewage tank 2, and clean water flows to the upper portion of the second sewage tank 2 and flows into the clean water tank 20.
The embodiment can also realize a back flushing function, when the grouting pump stops running, the back flushing pump 21 is started, the back flushing pump 21 firstly conveys clear water in the clear water tank 20 to the annular water pipes at the tops of the first sewage tank 1 and the second sewage tank 2 through back flushing pipelines, and then conveys clear water to the first mud conveying assembly and the second mud conveying assembly for flushing through the annular water pipes. The sewage after flushing is conveyed to a transfer tank 7; the sewage in the transfer tank 7 can be conveyed to the first sewage tank 1 or the second sewage tank 2 through the sewage conveying assembly for sewage treatment. In the embodiment, the annular water pipes are arranged at the tops of the first sewage tank 1 and the second sewage tank 2, and the slurry in the first sewage tank 1 and the second sewage tank 2 is prevented from flowing back into the pipeline when back flushing is performed due to the fact that the positions of the annular water pipes are higher.
As shown in fig. 2 and 4, the present invention discloses a sewage treatment system in another embodiment, which includes a first sewage tank 1, a second sewage tank 2, a sewage delivery assembly, and a mud tank 3. The sewage conveying assembly comprises a slurry pump 4, a main sewage conveying pipe 5 connected with the slurry pump 4, and two branch sewage conveying pipes 6 connected with the main sewage conveying pipe 5. The water inlet end of the slurry pump 4 is communicated with the interior of the transfer tank 7 through a sewage inlet pipe, and sewage is contained in the transfer tank 7. The water outlet ends of the two sewage conveying branch pipes 6 are respectively arranged on the upper sides of the interiors of the first sewage tank 1 and the second sewage tank 2, and the two sewage conveying branch pipes 6 are respectively provided with a first pneumatic ball valve 8. The upper parts of the inner sides of the first sewage tank 1 and the second sewage tank 2 are respectively provided with a sewage concentration detector 9.
After the slurry pump 4 is started, the sewage in the transfer tank 7 is conveyed to the first sewage tank 1 or the second sewage tank 2 through the main sewage conveying pipe 5 and the branch sewage conveying pipe 6. When the first pneumatic ball valve 8 connected to the sewage delivery branch pipe 6 of the first sewage tank 1 is opened, the second pneumatic ball valve 24 connected to the sewage delivery branch pipe 6 of the second sewage tank 2 is closed. One of the two pneumatic ball valves is in an open state, and the other pneumatic ball valve is in a closed state.
The top of the first sewage tank 1 and the second sewage tank 2 are provided with a water guide tank 10, a steady flow barrel 11 is arranged below the water guide tank 10, and sewage is tangent to the interior of the steady flow barrel 11 through the water guide tank 10. The water guide tank 10 is provided with a plurality of V-shaped guide plates which can slow down the flow of sewage. The sewage is firstly introduced into the water guide tank 10 after passing through the sewage conveying branch pipe 6, and the water flow speed is firstly slowed down. Then sewage enters the diversion turntable of the steady flow barrel 11, the water flow speed is slowed down for the second time, and then the sewage uniformly enters the middle part of the steady flow barrel 11, and the water flow speed is slowed down for the third time because the section suddenly becomes large. Then the sewage flows out and is dispersed into the first sewage tank 1 or the second sewage tank 2 through the guide vane at the bottom of the steady flow barrel 11.
After sewage enters the first sewage tank 1 and the second sewage tank 2, fixed particles such as suspended matters are precipitated to the bottom of the tank, an overflow tank 12 is arranged at the upper parts of the first sewage tank 1 and the second sewage tank 2, and clear water rises into the overflow tank 12. In this embodiment, a cone structure 13 is fixed in the middle of the bottoms of the inner sides of the first sewage tank 1 and the second sewage tank 2, and mud falls to the cone structure 13 and then spreads around the cone structure 13. The main bodies of the first sewage tank 1 and the second sewage tank 2 are straight cylinder structures, the bottoms of the first sewage tank 1 and the second sewage tank 2 are fixed with horizontal bottom plates, and the cone structures 13 are fixed on the horizontal bottom plates. In this embodiment, the first sewage tank 1 and the second sewage tank 2 are arranged into a straight cylinder structure, so that the problems of difficult foundation construction and high manufacturing cost are solved relative to the existing conical tank, and when mud is extracted, the mud is not hardened in the middle of the tank body, so that the mud blockage can be prevented.
The sewage treatment system further comprises a first mud conveying assembly and a second mud conveying assembly, and mud concentration detectors 14 are respectively arranged at the lower parts of the inner sides of the first sewage tank 1 and the second sewage tank 2. The first mud conveying component comprises a first mud transfer pump 15 and a first mud conveying pipe 16, mud at the bottom of the first sewage tank 1 automatically flows into the mud tank 3 through the first mud conveying component, and when the self-flowing flow is insufficient, the mud at the bottom of the first sewage tank 1 is conveyed to the mud tank 3 through the first mud transfer pump 15 and the first mud conveying pipe 16. The second mud conveying component comprises a second mud transfer pump 17 and a second mud conveying pipe 18, mud at the bottom of the second sewage tank 2 automatically flows into the mud tank 3 through the second mud conveying component, and when the self-flowing flow is insufficient, the mud at the bottom of the second sewage tank 2 is conveyed to the mud tank 3 through the second mud transfer pump 17 and the second mud conveying pipe 18. Preferably, the first mud conveying assembly and the second mud conveying assembly are at least two.
When the first sewage tank 1 and the second sewage tank 2 are used for sewage treatment, the mud concentration in the first sewage tank 1 and the second sewage tank 2 is detected by the mud concentration detector 14. When the first sewage tank 1 is used for sewage treatment and the concentration of the mud at the bottom of the first sewage tank 1 is detected to be more than or equal to 20%, the first mud transfer pumps 15 of the two first mud conveying assemblies are started to convey the mud at the bottom of the first sewage tank 1 to the mud tank 3 for storage. The upper part of the inner side of the mud tank 3 is provided with a liquid level sensor 19, and the outlet of the bottom of the mud tank 3 is connected with a filter press through a grouting pump and a mud conveying component. When the liquid level sensor 19 senses that the liquid level in the mud tank 3 reaches a specified position, the two first mud transfer pumps 15 stop running. Simultaneously, the grouting pump is started to convey the slurry in the slurry tank 3 to the filter press for filtering and dewatering. After the liquid level in the mud tank 3 has fallen to a specified position, the two first mud transfer pumps 15 are started again, and circulated in this way.
When the sewage concentration detector 9 detects that the rising sewage concentration in the first sewage tank 1 reaches more than 100mg/L, the first pneumatic ball valve 8 on the sewage conveying branch pipe 6 connected to the first sewage tank 1 is closed, the first pneumatic ball valve 8 on the sewage conveying branch pipe 6 connected to the second sewage tank 2 is opened, and sewage is conveyed into the second sewage tank 2. Similarly, when the concentration of the mud at the bottom of the second sewage tank 2 is detected to be more than or equal to 20%, the second mud transfer pumps 17 of the two second mud conveying assemblies are started to convey the mud at the bottom of the second sewage tank 2 to the mud tank 3 for storage.
When the liquid level sensor 19 in the mud tank 3 senses that the liquid level in the mud tank 3 reaches a specified position, the two second mud transfer pumps 17 stop running. Simultaneously, the grouting pump is started to convey the slurry in the slurry tank 3 to the filter press for filtering and dewatering. After the liquid level in the mud tank 3 has fallen to a specified position, the two second mud transfer pumps 17 are started again, and the circulation is performed.
The sewage treatment system also comprises a clean water tank 20, a back flush pump 21, a back flush conveying main pipe 22 and four back flush conveying branch pipes 23. The overflow tanks 12 at the upper parts of the first sewage tank 1 and the second sewage tank 2 are respectively communicated with the inside of the clean water tank 20 through clean water pipes, and clean water in the overflow tanks 12 is conveyed to the clean water tank 20 through the clean water pipes for storage and reuse in a production line. The water inlet of the back flush pump 21 is communicated with the interior of the clean water tank 20, the water outlet of the back flush pump 21 is connected with the back flush conveying main pipe 22, four back flush conveying branch pipes 23 are connected with the back flush conveying branch pipes 23, the four back flush conveying branch pipes 23 are respectively communicated with annular water pipes at the tops of the first sewage tank 1 and the second sewage tank, and the two annular water pipes are respectively communicated with the first mud conveying pipe 16 and the second mud conveying pipe 18. The two ends of the first mud conveying pipe 16 are respectively provided with a second pneumatic ball valve 24, and the two ends of the second mud conveying pipe 18 are respectively provided with a third pneumatic ball valve 25. The first mud conveying pipe 16 and the second mud conveying pipe 18 are respectively connected with a return pipe 26 communicated with the transfer tank 7, and the return pipe 26 is provided with a fourth pneumatic ball valve 27.
When the first mud transfer pump 15 and the second mud transfer pump 17 stop running, the back flushing pump 21 is started, and the clear water in the clear water tank 20 is pumped to back flush the two first mud conveying pipes 16 and the two second mud conveying pipes 18. During back flushing, the clear water firstly enters the annular water pipes arranged at the tops of the first sewage tank 1 and the second sewage tank 2, and then enters the first mud conveying pipe 16, the second mud conveying pipe 18, the conveying pipe for mud entering and the conveying pipe for the mud outlet part through the annular water pipes. During back flushing, the second pneumatic ball valve 24 and the third pneumatic ball valve 25 are both in a closed state, and the fourth pneumatic ball valve 27 is both in an open state. The sewage after back flushing enters a transfer tank 7.
In an embodiment, the first sewage tank 1 and the second sewage tank 2 may also be placed at a height higher than the mud tank 3. The slurry at the bottoms of the first sewage tank 1 and the second sewage tank 2 is directly pressed into the slurry tank 3 by utilizing the height difference. The first mud transfer pump 15 or the second mud transfer pump 17 is started only when the mud is not smoothly conveyed, so that the mud is forcedly conveyed into the mud tank 3, and the electricity consumption can be greatly saved.
The embodiments of the present invention are not limited thereto, and the present invention may be modified, substituted or combined in various other forms without departing from the basic technical spirit of the present invention, which falls within the scope of the claims, according to the above-described aspects of the present invention, using the general knowledge and conventional means of the art.

Claims (8)

1. The sewage treatment method is characterized by comprising the following steps:
the sewage is conveyed to a first sewage tank through a sewage conveying assembly;
when the sewage concentration at the upper part in the first sewage tank reaches a set threshold value, cutting off a conveying channel between the sewage conveying assembly and the first sewage tank, and opening the conveying channel between the sewage conveying assembly and the second sewage tank;
the sewage is conveyed to a second sewage tank through a sewage conveying assembly;
when the sewage concentration at the upper part in the second sewage tank reaches a set threshold value, cutting off a conveying channel between the sewage conveying assembly and the second sewage tank, and opening the conveying channel between the sewage conveying assembly and the first sewage tank;
sequentially circulating between the first sewage tank and the second sewage tank until all sewage is treated;
after the sewage is conveyed to the first sewage tank through the sewage conveying assembly, the sewage treatment device further comprises:
detecting the concentration of the slurry at the bottom of the first sewage tank, and conveying the slurry at the bottom of the first sewage tank to the slurry tank through the first slurry conveying assembly after the detected concentration of the slurry reaches a set threshold value;
when the liquid level in the mud tank reaches a specified position, suspending the transmission of mud in the first sewage tank to the mud tank;
after the sewage is conveyed to the second sewage tank through the sewage conveying assembly, the sewage treatment device further comprises:
detecting the concentration of the slurry at the bottom of the second sewage tank, and conveying the slurry at the bottom of the second sewage tank to the slurry tank through the second slurry conveying assembly after the detected concentration of the slurry reaches a set threshold value;
and suspending the transportation of the slurry in the second sewage tank to the slurry tank after the detected liquid level in the slurry tank reaches the designated position.
2. The wastewater treatment method according to claim 1, wherein,
the mud at the bottom of the first sewage tank is conveyed to the mud tank through the first mud conveying assembly, and the mud conveying assembly specifically comprises:
automatically flowing the mud at the bottom of the first sewage tank to the mud tank by utilizing water pressure through the first mud conveying assembly;
when the self-flowing flow is insufficient, a first mud transfer pump of the first mud conveying assembly is started, and mud at the bottom of the first sewage tank is conveyed to the mud tank through the first mud transfer pump;
the mud at the bottom of the second sewage tank is conveyed to the mud tank through the second mud conveying assembly, and the mud conveying assembly specifically comprises:
automatically flowing the slurry at the bottom of the second sewage tank to the slurry tank by utilizing water pressure through the second slurry conveying assembly;
when the self-flowing flow is insufficient, a second slurry transfer pump of the second slurry conveying assembly is started, and the slurry at the bottom of the second sewage tank is conveyed to the slurry tank through the second slurry transfer pump.
3. The wastewater treatment method according to claim 1, further comprising:
starting a grouting pump while suspending the slurry in the first sewage tank from being conveyed to the slurry tank, and conveying the slurry in the slurry tank to a filter press for filtering and dewatering through the grouting pump and a slurry conveying pipeline; when the liquid level in the mud tank drops to a designated position, conveying the mud in the first sewage tank to the mud tank again, and sequentially circulating;
starting a grouting pump while suspending the slurry in the second sewage tank from being conveyed to the slurry tank, and conveying the slurry in the slurry tank to a filter press for filtering and dewatering through the grouting pump and the slurry conveying assembly; and after the liquid level in the mud tank is lowered to a designated position, conveying the mud in the second sewage tank to the mud tank again, and sequentially circulating.
4. The wastewater treatment method according to claim 3, further comprising:
after the sewage is conveyed to the first sewage tank through the sewage conveying assembly, mud is precipitated to the bottom of the first sewage tank, and clear water flows to the upper part of the first sewage tank and flows into the clear water tank;
after the sewage is conveyed to the second sewage tank through the sewage conveying assembly, mud is precipitated to the bottom of the second sewage tank, and clear water flows to the upper part of the second sewage tank and flows into the clear water tank;
when the grouting pump stops running, a back flushing pump is started, the back flushing pump conveys clear water in a clear water tank to annular water pipes at the tops of the first sewage tank and the second sewage tank through back flushing pipelines, and conveys clear water to the first mud conveying assembly and the second mud conveying assembly for flushing through the annular water pipes, and the flushed sewage is conveyed to a transfer tank; sewage in the transfer pond can be conveyed to the first sewage tank or the second sewage tank through the sewage conveying assembly for sewage treatment.
5. The sewage treatment method as claimed in any one of claims 1 to 4, wherein when the sewage concentration in the upper portion of the first sewage tank/second sewage tank is detected to be 100mg/L or more, a conveyance passage between the sewage conveyance unit and the first sewage tank/second sewage tank is shut off; and when the concentration of the slurry at the bottom of the first sewage tank/the second sewage tank is detected to be more than or equal to 20%, conveying the slurry in the first sewage tank/the second sewage tank to the slurry tank.
6. The sewage treatment system is characterized by comprising a first sewage tank, a second sewage tank and a sewage conveying assembly, wherein the sewage conveying assembly comprises a slurry pump, a main sewage conveying pipe connected with the slurry pump, and two branch sewage conveying pipes connected with the main sewage conveying pipe, the water inlet end of the slurry pump is communicated with the interior of a transfer tank through a sewage inlet pipe, sewage is placed in the transfer tank, the water outlet ends of the two branch sewage conveying pipes are respectively arranged on the upper sides of the interior of the first sewage tank and the second sewage tank, first pneumatic ball valves are respectively arranged on the two branch sewage conveying pipes, and sewage concentration detectors are respectively arranged on the upper parts of the inner sides of the first sewage tank and the second sewage tank;
the device comprises a first sewage tank, a second sewage tank, a first mud conveying assembly and a second mud conveying assembly, wherein the lower parts of the inner sides of the first sewage tank and the second sewage tank are respectively provided with a mud concentration detector; the second slurry conveying assembly comprises a second slurry transfer pump and a second slurry conveying pipe, and the second slurry transfer pump conveys slurry at the bottom of the second sewage tank to the slurry tank through the second slurry conveying pipe; the upper part of the inner side of the mud tank is provided with a liquid level sensor.
7. The sewage treatment system of claim 6, further comprising a clean water tank, a backwash pump, a backwash conveying main pipe and at least two backwash conveying branch pipes, wherein overflow tanks at the upper parts of the first sewage tank and the second sewage tank are respectively communicated with the interior of the clean water tank through clean water pipes, a water inlet of the backwash pump is communicated with the interior of the clean water tank, a water outlet of the backwash pump is connected with the backwash conveying main pipe, the two backwash conveying branch pipes are both connected with the backwash conveying branch pipes, the two backwash conveying branch pipes are respectively communicated with annular water pipes at the tops of the first sewage tank and the second sewage tank, and the two annular water pipes are respectively communicated with the first mud conveying pipe and the second mud conveying pipe; the two ends of the first mud conveying pipe are respectively provided with a second pneumatic ball valve, the two ends of the second mud conveying pipe are respectively provided with a third pneumatic ball valve, the upper parts of the first mud conveying pipe and the second mud conveying pipe are respectively connected with a return pipe communicated with the transfer pool, and the return pipe is provided with a fourth pneumatic ball valve.
8. The sewage treatment system of claim 6, wherein the tops of the first sewage tank and the second sewage tank are provided with water guide tanks, a steady flow barrel is arranged below the water guide tanks, sewage passes through the inside of the water guide tank tangent steady flow barrel, a cone structure is fixed in the middle of the bottoms of the inner sides of the first sewage tank and the second sewage tank, the main bodies of the first sewage tank and the second sewage tank are of straight barrel structures, the bottoms of the first sewage tank and the second sewage tank are fixed with horizontal bottom plates, and the cone structures are fixed on the horizontal bottom plates; the bottom outlet of the mud tank is connected with the filter press through a grouting pump and a mud conveying component.
CN202211476524.9A 2022-11-23 2022-11-23 Sewage treatment system and treatment method Active CN115779505B (en)

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