A vortex lift sewage treatment apparatus and process
By using lifting agents and chemical agents to treat wastewater in a vortex reactor, the problem of slow sludge floating or settling speed is solved, achieving efficient wastewater purification and energy saving, and is suitable for wastewater treatment plants with limited space.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Patents(China)
- Current Assignee / Owner
- TIANJIN CHANGHAI JIANGHAN PETROLEUM MASCH EQUIP CO LTD
- Filing Date
- 2024-06-03
- Publication Date
- 2026-05-12
AI Technical Summary
Existing wastewater treatment equipment is ineffective at treating oily or lightly dense impurities, causing sludge to float or sink more slowly, thus affecting treatment efficiency. Furthermore, traditional equipment cannot be installed in locations with limited space.
The vortex-lift wastewater treatment device uses a lifting agent, coagulant, and flocculant to mix in a horizontal vortex reactor to form sludge. The lifting agent lifts the sludge to the top for separation, and the purified water is discharged downwards. The device has a closed structure to reduce gas escape and is suitable for space-constrained locations.
It increases the sludge rising speed, enhances sludge-water separation efficiency, reduces power consumption, saves treatment costs, and solves the problem of treating light component impurities, making it suitable for enclosed environments.
Smart Images
Figure CN118579909B_ABST
Abstract
Description
Technical Field
[0001] This invention belongs to the field of petrochemical technology, specifically relating to a vortex-lifting wastewater treatment device and process. Background Technology
[0002] Municipal wastewater treatment systems are multi-stage processes designed to reduce or remove organic matter, solids, and pathogens from wastewater before it is discharged into natural water systems. Different natural water systems have their own acceptable discharge limits to ensure that treated water discharged into these systems does not negatively impact or degrade their quality.
[0003] Current wastewater treatment equipment typically settles the sludge generated during treatment to the bottom (except for air flotation). By discharging the sludge from the bottom, the wastewater is purified. However, some wastewater contains oil or lighter impurities. During the water treatment process, the sludge absorbs the oil or lighter impurities, reducing its overall density and slowing down its settling speed. If enough oil is absorbed, making the overall density less than that of water, the sludge will float to the surface, rendering the equipment designed for sludge settling ineffective and unable to treat this type of wastewater. Summary of the Invention
[0004] The purpose of this invention is to provide a wastewater treatment device, particularly a closed and efficient wastewater treatment device and process developed using vortex lifting. This invention is applied to wastewater treatment, especially the treatment of wastewater containing oil or other impurities that are not easy to settle; wastewater treatment stations with low space height that are not suitable for vertical tank installation; and mobile wastewater treatment stations.
[0005] To achieve the above objectives, the present invention provides the following technical solution:
[0006] A vortex-lifting sewage treatment device includes a main pipeline, a dosing point, a water distributor, a sewage treatment unit, a sludge discharge structure, a drainage structure, and a mud discharge structure.
[0007] The main pipeline uses a booster pump to transport sewage to a sewage treatment plant for processing.
[0008] The wastewater treatment unit includes a horizontal cylindrical body, which is a sealed pressure vessel with end caps at both ends. Multiple vortex reaction cylinders are arranged side by side inside the cylinder. Multiple vortex guide grooves are evenly arranged circumferentially on the inner wall of the vortex reaction cylinder.
[0009] The dosing point is used to add lifting agents, coagulants, and flocculants to the main pipeline;
[0010] The water distributor is located on the main pipeline and diverts the sewage injected into the main pipeline into multiple branch pipes, which are then injected into multiple vortex reaction cylinders inside the sewage treatment plant.
[0011] The slag discharge structure is located at the top of each vortex reaction cylinder and is used to discharge the scum generated during wastewater treatment.
[0012] The drainage structure is located at the bottom of each vortex reactor and is used to discharge the purified water generated by the wastewater treatment. The drainage structure includes a water collection coil located below each vortex reactor and a drain pipe connecting all the water collection coils. The purified water generated by the vortex reactor enters the water collection coil for storage and is then discharged through the drain pipe.
[0013] The sludge discharge structure is also located at the bottom of each vortex reaction cylinder, and is used to discharge the sludge generated from wastewater treatment.
[0014] As a preferred technical solution, the dosing points include a lifting agent dosing point, a mixing pump, a coagulant dosing point, and a flocculant dosing point. The lifting agent dosing point and the mixing pump are located on a bypass pipeline connected to the main pipeline. During operation, the lifting agent is first added to the lifting agent dosing point, and then mixed with the sewage by the mixing pump before being pumped into the main pipeline. The coagulant dosing point and the flocculant dosing point are located on the main pipeline. After the lifting agent is added, the coagulant and flocculant are added sequentially, with the coagulant and flocculant dosing points spaced 1-10 minutes apart.
[0015] As a preferred technical solution, the slag discharge structure includes an upper sludge discharge pipe and a slag collector installed on the upper sludge discharge pipe; a slag collector is provided above each vortex reaction cylinder.
[0016] As a preferred technical solution, the sludge discharge structure includes a lower sludge discharge pipe located below the wastewater treatment unit.
[0017] As a preferred technical solution, the water collection coil is a perforated annular pipe.
[0018] The process of the above-mentioned vortex lifting wastewater treatment device includes the following steps:
[0019] S1. Wastewater is first lifted by a booster pump and then enters the dosing point. Lifting agent is added through the bypass pipe of the dosing point and mixed by a mixing pump before entering the main pipe. Then coagulant is added, and flocculant is added after 1-10 minutes. Then, the wastewater is evenly distributed to each branch pipe through a distributor and then sent to the vortex reactor through the branch pipes.
[0020] S2. Inside the vortex reactor, wastewater is fully mixed and reacted with lifting agent, coagulant and flocculant to form sludge.
[0021] S3. The sludge adsorbs impurities in the wastewater and combines with the lifting agent. It rises in a vortex in the vortex reactor. After rising to the top of the vortex reactor, it enters the sludge-water separation zone. The sludge is lifted by the lifting agent to the top of the processor cylinder and enters the scum collector. It is then discharged from the device through the upper sludge discharge pipe.
[0022] S4. After the sewage and sludge are separated, the generated purified water enters the lower water collection coil and is transported to the subsequent equipment through the drain pipe to complete the sewage purification.
[0023] S5. The sludge that does not float to the surface settles to the bottom of the sewage treatment unit and is discharged from the device through the sludge discharge pipe.
[0024] As a preferred technical solution, the lifting agent is mineral oil or plastic powder, and the dosage is 30-3000 PPM.
[0025] As a preferred technical solution, the coagulant is one or more of polyaluminum chloride, polyferric sulfate, and ferric chloride, and the dosage is 30-10000 PPM.
[0026] As a preferred technical solution, the flocculant is one or more of polyacrylamide and sodium polyacrylate, and the dosage is 2-100 PPM.
[0027] Compared with the prior art, the present invention has the following beneficial effects:
[0028] (1) The unique design of the vortex reaction cylinder device ensures that the reagents (including the lifting agent) are fully mixed and reacted with the sewage, so as to maximize the effectiveness of the reagents and save the operating cost of sewage.
[0029] (2) The use of lifting agent to lift the sludge to the top greatly increases the sludge rising speed, accelerates the separation of mud and water, and improves the treatment efficiency of the device; at the same time, it also solves the problem of sludge not settling or floating when treating sewage containing light impurities.
[0030] (3) The treatment device is a closed device, which solves the problem of gas escaping from water in other treatment methods and effectively ensures the safety and hygiene of the working environment.
[0031] (4) The treatment device is a closed device and is subjected to a certain pressure, so that the effluent can directly enter the subsequent treatment device (such as filter tank, etc.) without further pressurization, reducing power consumption and saving treatment costs. Similarly, slag and mud are discharged directly by the pressure inside the device without the need for pump pressurization, reducing equipment investment and power consumption, and saving treatment costs.
[0032] (5) The sewage treatment unit has a horizontal structure, which greatly increases the cross-sectional area of the separation zone and reduces the height of the device, thus solving the problem that the plant space is not high enough to install a vertical device. Attached Figure Description
[0033] Figure 1 This is a schematic diagram of the wastewater treatment device provided by the present invention.
[0034] In the above diagram: 1. Main pipeline; 21. Lifting agent dosing point; 22. Mixing pump; 23. Coagulant dosing point; 24. Flocculant dosing point; 3. Water distributor; 4. Wastewater treatment unit; 41. Vortex reactor; 5. Upper sludge discharge pipe; 61. Water collection coil; 62. Drainage pipe; 71. Lower sludge discharge pipe; 72. Scum collector; 8. Lifting pump. Detailed Implementation
[0035] To make the technical means, creative features, objectives and effects of this invention easier to understand, the invention will be further described below in conjunction with specific embodiments.
[0036] like Figure 1 As shown, the present invention discloses a vortex lifting sewage treatment device, including a main pipeline 1, a dosing point, a water distributor 3, a sewage treatment unit 4, a sludge discharge structure, a drainage structure, and a mud discharge structure.
[0037] The main pipeline 1 transports sewage to the vortex reactor for treatment via a booster pump 8; preferably, the booster pump is a centrifugal water pump made of cast iron, cast steel, stainless steel, engineering plastic or PVC, with a pump head of 0.1-1.0 MPa.
[0038] The dosing point is used to add lifting agent, coagulant and flocculant to the main pipeline 1; the water distributor 3 is installed on the main pipeline 1 to divide the sewage injected into the main pipeline 1 into multiple branch pipes, which are then injected into multiple vortex reaction cylinders inside the sewage treatment plant 4; preferably, the inlet section of each branch pipe is tangent to the cylinder body of the vortex reaction cylinder.
[0039] The slag discharge structure is located at the top of each vortex reactor and is used to discharge the scum generated during wastewater treatment; the drainage structure is located at the bottom of each vortex reactor and is used to discharge the purified water generated during wastewater treatment; the sludge discharge structure is also located at the bottom of each vortex reactor and is used to discharge the sludge generated during wastewater treatment.
[0040] The dosing points include a lifting agent dosing point 21, a mixing pump 22, a coagulant dosing point 23, and a flocculant dosing point 24. The lifting agent dosing point 21 and the mixing pump 22 are located on a bypass pipeline connected to the main pipeline 1, with a bypass pipeline diameter ratio of 1:1 to 1:1000 to the main pipeline. During operation, the lifting agent is first added to the lifting agent dosing point 21, and then mixed with the wastewater by the mixing pump 22 before being pumped into the main pipeline 1. The coagulant dosing point 23 and the flocculant dosing point 24 are located on the main pipeline 1. After the lifting agent is added, the coagulant and flocculant are added sequentially, with a 1-10 minute interval between the coagulant and flocculant dosing points. Preferably, the lifting agent is mineral oil or plastic powder, with a dosage of 30-3000 PPM; the coagulant is one or more of polyaluminum chloride, polyferric sulfate, and ferric chloride, with a dosage of 30-10000 PPM; and the flocculant is one or more of polyacrylamide and sodium polyacrylate, with a dosage of 2-100 PPM.
[0041] The wastewater treatment unit 4 includes a horizontal cylindrical body, which is a sealed pressure vessel with end caps at both ends, with a diameter of 0.2-3.0 m and a pressure-bearing capacity of 0.1-2.0 MPa. Multiple vortex reaction cylinders are arranged side-by-side inside the cylinder. Preferably, multiple vortex guide channels are evenly arranged circumferentially on the inner wall of the vortex reaction cylinder, with a channel spacing of 0.1-1.0 m.
[0042] The slag discharge structure includes an upper mud discharge pipe 5 and a slag collector 72 installed on the upper mud discharge pipe 5; a slag collector 72 is installed above each vortex reactor. The slag collector 72 is a cone, with the upper mud discharge pipe at the top of the cone. After the slag is discharged, the slag below continuously enters the cone, achieving the purpose of collection.
[0043] The drainage structure includes a water collection coil 61 located below each vortex reactor and a drain pipe 62 connecting all the water collection coils 61. The purified water generated by the vortex reactor enters the water collection coil 61 for storage and is then discharged through the drain pipe 62. Preferably, the water collection coil 61 is coiled into a ring shape with perforations in its wall. The outlet end of the water collection coil 61 is connected to the drain pipe, allowing purified water to enter the pipe through the perforations in its wall and then be discharged to the outside through the drain pipe. The diameter of the ring is 0.3-3.0 m, and the diameter of the perforations is 0.05-0.2 m.
[0044] The sludge discharge structure includes a lower sludge discharge pipe 71 located below the wastewater treatment unit 4. The sludge discharge coil is a perforated coil with a hole diameter of 10-100mm.
[0045] The wastewater treatment process of the above-mentioned vortex lifting wastewater treatment device includes the following steps:
[0046] S1. Wastewater is first lifted by a booster pump and then enters the dosing point. Lifting agent is added through the bypass of the dosing point and mixed by the mixing pump 22 before entering the main pipeline 1. Then coagulant is added, and after a period of time, flocculant is added. Then, through the distributor 3, it is evenly distributed to each branch pipe and then sent to the vortex reactor through the branch pipes.
[0047] S2. Inside the vortex reactor, wastewater is fully mixed and reacted with lifting agent, coagulant and flocculant to form sludge.
[0048] S3. The sludge adsorbs impurities in the wastewater and combines with the lifting agent. It rises in a vortex in the vortex reactor. After rising to the top of the vortex reactor, it enters the sludge-water separation zone. The sludge is lifted by the lifting agent to the top of the processor cylinder and enters the scum collector 72. It is then discharged from the device through the upper sludge discharge pipe 5 for further treatment.
[0049] S4. After the sewage and sludge are separated, the generated purified water enters the lower water collection coil 61 and is transported to the subsequent equipment through the drain pipe to complete the purification of the sewage.
[0050] S5. The sludge that does not float to the surface settles to the bottom of the sewage treatment unit and is discharged from the device through the lower sludge discharge pipe 71 for further treatment.
[0051] The wastewater treatment process of the above-mentioned vortex lifting wastewater treatment device will be described in detail below through two embodiments:
[0052] Example 1 (Treatment of oily wastewater from gas fields)
[0053] Oily wastewater from the gas field is pumped to the dosing points at a flow rate of 50 m³ / h via a lift pump. Condensate oil produced by the gas field is added to the wastewater at a concentration of 30-1000 PPM from the lift agent dosing point 21. Polyaluminum chloride is added from the coagulant dosing point 23 at a concentration of 30-6000 PPM; polyacrylamide is added from the flocculant dosing point 24 at a concentration of 2-100 PPM. The wastewater is then distributed via a distributor 3 to branch pipes and enters the vortex reactor, where it mixes and reacts to form sludge, which rises in the vortex to... The sludge enters the sludge-water separation zone at the top of the vortex reactor and rises to the upper part of the vortex reactor under the action of the lifting agent. It is then collected by the scum collector 72 and discharged from the device through the upper sludge discharge pipe, thus achieving sludge-water separation. The wastewater that has been separated from the sludge is purified water, which is directly transported to the subsequent quartz sand filter tank through the drain pipe 62 by the internal pressure of the device. The remaining sludge that has not been lifted settles to the bottom of the wastewater treatment tank and is discharged from the sludge treatment tank through the sludge discharge pipe 5.
[0054] Table 1 shows the actual detection results of each pollutant before and after the treatment of oily wastewater from the gas field in this embodiment (where: SS is suspended solids, OIL is oil):
[0055]
[0056] Example 2 (Wastewater Treatment in a Food Factory)
[0057] Wastewater from food processing plants containing vegetable oil was directly discharged into a 10m³ flow. 3 The wastewater is pumped at a flow rate of / h to the dosing point. The vegetable oil recovered from the food factory is added to the wastewater at a concentration of 300-800 PPM from the lifting agent dosing point 21. Polyaluminum chloride is added at a concentration of 2000 PPM from the coagulant dosing point 23, and polyacrylamide is added at a concentration of 5 PPM from the flocculant dosing point 24. The wastewater is then distributed to the branch pipes by the water distributor 3 and enters the vortex reactor. The sludge is mixed and reacted in the reactor, forming sludge. The sludge rises to the top of the vortex reactor and enters the sludge-water separation zone of the reactor. Under the action of the lifting agent, the sludge rises to the upper part of the vortex reactor and is collected by the scum collector 72. It is then discharged to the scum collection tank through the upper sludge discharge pipe, thus achieving sludge-water separation. The wastewater separated from the sludge is purified water and is directly transported to the subsequent quartz sand filter tank through the drain pipe 62 by the internal pressure of the device. The remaining sludge that is not lifted settles to the bottom of the wastewater treatment unit 4 and is discharged from the device through the sludge discharge pipe 5.
[0058] Table 2 shows the actual detection results of various pollutants in the wastewater containing vegetable oil before and after treatment in this embodiment (where: SS is suspended solids, OIL is oil; COD is chemical oxygen demand):
[0059]
[0060] The foregoing has shown and described the basic principles, main features, and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of the invention. Various changes and modifications can be made to the invention without departing from its spirit and scope, and all such changes and modifications fall within the scope of the present invention as claimed. The scope of protection of this invention is defined by the appended claims and their equivalents.
Claims
1. A vortex-lifting sewage treatment device, characterized in that: This includes main pipelines, chemical dosing points, water distributors, wastewater treatment systems, sludge removal structures, drainage structures, and mud removal structures. The main pipeline uses a booster pump to transport sewage to a sewage treatment plant for processing. The wastewater treatment unit includes a horizontal cylindrical body, which is a sealed pressure vessel with end caps at both ends. Multiple vortex reaction cylinders are arranged side by side inside the cylinder. Multiple vortex guide grooves are evenly arranged circumferentially on the inner wall of the vortex reaction cylinder. The dosing point is used to add lifting agents, coagulants, and flocculants to the main pipeline; The water distributor is located on the main pipeline and diverts the sewage injected into the main pipeline into multiple branch pipes, which are then injected into multiple vortex reaction cylinders inside the sewage treatment plant. The slag discharge structure is located at the top of each vortex reaction cylinder and is used to discharge the scum generated during wastewater treatment. The drainage structure is located at the bottom of each vortex reactor and is used to discharge the purified water produced by the sewage treatment. The drainage structure includes a water collection coil located below each vortex reactor and a drain pipe connecting all the water collection coils. The purified water produced by the vortex reactor enters the water collection coil for storage and is then discharged through the drain pipe. The sludge discharge structure is located at the bottom of each vortex reaction cylinder and is used to discharge the sludge generated during wastewater treatment.
2. The vortex-lifting sewage treatment device as described in claim 1, characterized in that: The dosing points include a lifting agent dosing point, a mixing pump, a coagulant dosing point, and a flocculant dosing point. The lifting agent dosing point and the mixing pump are located on a bypass pipeline connected to the main pipeline. During operation, the lifting agent needs to be added to the lifting agent dosing point first, and then mixed with the sewage by the mixing pump and pumped into the main pipeline. The coagulant dosing point and the flocculant dosing point are located on the main pipeline. After the lifting agent is added, the coagulant and flocculant are added in sequence, with the coagulant and flocculant dosing points spaced 1-10 minutes apart.
3. The vortex-lifting sewage treatment device as described in claim 1, characterized in that: The slag discharge structure includes an upper sludge discharge pipe and a slag collector installed on the upper sludge discharge pipe; a slag collector is installed above each vortex reactor.
4. The vortex-lifting sewage treatment device as described in claim 1, characterized in that: The water collection coil is a perforated circular pipe, and the outlet end of the water collection coil is connected to a drain pipe.
5. The vortex-lifting sewage treatment device as described in claim 1, characterized in that: The sludge discharge structure includes a lower sludge discharge pipe located below the wastewater treatment unit.
6. The wastewater treatment process of the vortex-lifting wastewater treatment device as described in claim 1, characterized in that, Includes the following steps: S1. Wastewater is first lifted by a booster pump and then enters the dosing point. Lifting agent is added through the bypass pipe of the dosing point and mixed by a mixing pump before entering the main pipe. Then coagulant is added, and flocculant is added after 1-10 minutes. Then, the wastewater is evenly distributed to each branch pipe through a distributor and then sent to the vortex reactor through the branch pipes. S2. Inside the vortex reactor, wastewater is fully mixed and reacted with lifting agent, coagulant and flocculant to form sludge. S3. The sludge adsorbs impurities in the wastewater and combines with the lifting agent. It rises in a vortex in the vortex reactor. After rising to the top of the vortex reactor, it enters the sludge-water separation zone. The sludge is lifted by the lifting agent to the top of the processor cylinder and enters the scum collector. It is then discharged from the device through the upper sludge discharge pipe. S4. After the sewage and sludge are separated, the generated purified water enters the lower water collection coil and is transported to the subsequent equipment through the drain pipe to complete the sewage purification. S5. The sludge that does not float to the surface settles to the bottom of the sewage treatment unit and is discharged from the device through the sludge discharge pipe.
7. The wastewater treatment process of the vortex lifting wastewater treatment device as described in claim 6, characterized in that: The lifting agent is mineral oil or plastic powder, and the dosage is 30-3000 PPM.
8. The wastewater treatment process of the vortex lifting wastewater treatment device as described in claim 6, characterized in that: The coagulant is one or more of polyaluminum chloride, polyferric sulfate, and ferric chloride, with a dosage of 30-10000 PPM.
9. The wastewater treatment process of the vortex lifting wastewater treatment device as described in claim 6, characterized in that: The flocculant is one or more of polyacrylamide and sodium polyacrylate, and the dosage is 2-100 PPM.