Vortex lifting sewage treatment device

Abstract

The utility model belongs to the technical field of petrochemical engineering, and particularly relates to a vortex lifting sewage treatment device which comprises a main pipeline, a dosing point, a water segregator, a sewage treatment device, a deslagging structure, a drainage structure and a sludge discharge structure, the main pipeline is used for conveying sewage into the sewage treatment device for treatment through the lifting pump; the dosing point is used for adding a lifting agent, a coagulant and a flocculant into the main pipeline; the water segregator is provided with a plurality of vortex reaction cylinders which are used for dividing sewage injected into the main pipeline into a plurality of branch pipes and then injecting the sewage into the sewage treatment device; the scum discharging structure is used for discharging scum generated by sewage treatment; the drainage structure is used for discharging purified water generated by sewage treatment; the sludge discharge structure is used for discharging sludge generated by sewage treatment. According to the utility model, the sewage treatment speed and efficiency are improved, the power consumption is reduced, and the problem that a vertical device cannot be mounted due to insufficient plant space height is solved.

Description

Technical Field

[0001] The utility model belongs to the technical field of petrochemical industry, and in particular relates to a vortex lifting sewage treatment device. Background Art

[0002] Municipal wastewater treatment is a multi-stage treatment process that aims to reduce or remove organic matter, solid content and viral pathogens before the wastewater is discharged into natural water systems. Different natural water systems have their own acceptable discharge limits, the purpose of which is to ensure that when treated water is discharged into natural water systems, it will not affect or reduce the quality of natural water systems.

[0003] The current sewage treatment equipment all settles the sludge generated during treatment to the bottom (except flotation) and discharges the sludge from the bottom to achieve the purpose of sewage purification. Some sewage contains oil or light-density impurities in the water. During the water treatment process, the sludge formed absorbs the oil or light-density impurities, which makes the overall density of the sludge smaller and reduces the sinking speed. If the adsorbed oil is enough to make the overall density less than the density of water, the sludge will float to the water surface, making the original design of sludge sinking equipment ineffective and unable to treat such sewage. Summary of the invention

[0004] The purpose of the utility model is to provide a sewage treatment device, in particular, a closed and efficient sewage treatment device developed by using vortex lifting. The utility model is applied to sewage treatment, in particular, sewage containing oil or other impurities that are not easy to settle; sewage treatment stations with low space height and not suitable for vertical tank installation, and mobile sewage treatment stations.

[0005] In order to achieve the above purpose, the utility model provides the following technical solutions:

[0006] A vortex lifting sewage treatment device, comprising a main pipeline, a dosing point, a water distributor, a sewage treatment device, a slag discharge structure, a drainage structure and a mud discharge structure;

[0007] The main pipeline transports the sewage to the sewage treatment device for treatment through the lifting pump;

[0008] The sewage treatment device comprises a cylindrical body of a horizontal structure, which is a closed pressure-bearing container with caps at both ends, and a plurality of vortex reaction cylinders are arranged side by side in the cylinder; a plurality of vortex guide grooves are evenly arranged on the inner wall of the vortex reaction cylinder along the circumferential direction;

[0009] The dosing point is used to add a lifting agent, a coagulant and a flocculant to the main pipeline;

[0010] The water divider is arranged on the main pipe, and divides the sewage injected into the main pipe into a plurality of branch pipes, and then injects the sewage into a plurality of vortex reaction cylinders inside the sewage treatment device;

[0011] The slag discharge structure is arranged at the top of each vortex reaction cylinder and is used to discharge the slag generated by sewage treatment;

[0012] The drainage structure is arranged at the bottom of each vortex reaction cylinder and is used to discharge the purified water generated by sewage treatment;

[0013] The sludge discharge structure is also arranged at the bottom of each vortex reaction cylinder to discharge the sludge generated by sewage treatment.

[0014] As a preferred technical solution, the dosing point includes 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 arranged in 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 sewage through the mixing pump and pumped into the main pipeline. The coagulant dosing point and the flocculant dosing point are arranged in the main pipeline. After the lifting agent is added, the coagulant and flocculant are added in sequence. The coagulant and flocculant dosing points are separated by 1-10 minutes.

[0015] As a preferred technical solution, the lifting agent is mineral oil or plastic powder, and the dosage is 30-3000PPM.

[0016] As a preferred technical solution, the coagulant is one or more of polyaluminium chloride, polyferric sulfate and ferric chloride, and the dosage is 30-10000 PPM.

[0017] As a preferred technical solution, the flocculant is one or more of polyacrylamide and sodium polyacrylate, and the dosage is 2-100 PPM.

[0018] As a preferred technical solution, the slag discharge structure includes an upper mud discharge pipe and a slag collector arranged on the mud discharge pipe; a slag collector is arranged above each vortex reaction cylinder.

[0019] As a preferred technical solution, the drainage structure includes a water collecting coil arranged under each vortex reaction cylinder and a drainage pipe connecting all the water collecting coils. The purified water produced by the vortex reaction cylinder enters the water collecting coil for storage and then is discharged through the drainage pipe.

[0020] As a preferred technical solution, the mud discharge structure includes a lower mud discharge pipe arranged below the sewage treatment device.

[0021] As a preferred technical solution, the water collecting coil is a circular perforated tube.

[0022] The process of the vortex lifting sewage treatment device comprises the following steps:

[0023] S1. The sewage is first lifted by the lifting pump and enters the dosing point. The lifting agent is first added through the bypass of the dosing point, and then mixed by the mixing pump before entering the main line. Then the coagulant is added, and then the flocculant is added after a period of time. Then, it is evenly distributed to each branch pipe through the water distributor, and then sent to the vortex reaction cylinder through the branch pipes;

[0024] S2. In the vortex reaction cylinder, the sewage is fully mixed and reacted with the lifting agent, coagulant and flocculant to form sludge;

[0025] S3, the sludge absorbs impurities in the sewage and combines with the lifting agent, vortexes and rises in the vortex reaction cylinder. After rising to the top of the vortex reaction cylinder, it enters the mud-water separation area. The sludge is lifted by the lifting agent to the top of the processor cylinder, enters the scum collector, and then discharged from the device through the slag discharge pipe;

[0026] S4, after the sewage and sludge are separated, the generated purified water enters the water collecting coil at the bottom and is transported to the subsequent equipment through the outlet pipe to complete the sewage purification;

[0027] S5. The sludge that does not float up settles to the bottom of the treatment cylinder and is discharged out of the device through the sludge discharge pipe.

[0028] Compared with the prior art, the utility model has the following beneficial effects:

[0029] (1) The unique design of the vortex reaction cylinder ensures that the reagents (including the lifting agent) are fully mixed and reacted with the sewage, giving full play to the maximum effect of the reagents, thereby saving the operating cost of the sewage;

[0030] (2) The use of lifting agents to lift the sludge upward greatly increases the rising speed of the sludge, 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 neither sinking nor floating when treating sewage containing light component impurities.

[0031] (3) The treatment device is a closed device, which solves the problem of gas leakage in water in other treatment methods and effectively ensures the safety and hygiene of the working environment.

[0032] (4) The treatment device is a closed device and is subject to a certain pressure, so that the effluent can directly enter the subsequent treatment device (such as a filter tank, etc.) without the need for pressurization, reducing power consumption and saving treatment costs. Similarly, slag and mud are directly discharged by relying on the pressure in the device, without the need for pumping to increase pressure. While reducing the investment in the device, it also reduces power consumption and saves treatment costs.

[0033] (5) The sewage treatment device 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 of insufficient plant space to install a vertical device. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] Figure 1 This is a structural schematic diagram of the sewage treatment device provided by the utility model.

[0035] In the above figure: 1. Main pipeline; 21. Lifting agent addition point; 22. Mixing pump; 23. Coagulant addition point; 24. Flocculant addition point; 3. Water distributor; 4. Sewage treatment device; 41. Vortex separation cylinder; 5. Upper sludge pipe; 61. Water collecting coil; 62. Drain pipe; 71. Lower sludge pipe; 71. Scum collector. DETAILED DESCRIPTION

[0036] In order to make the technical means, creative features, objectives and effects achieved by the present invention easy to understand, the present invention is further described below in conjunction with specific implementation methods.

[0037] like Figure 1 As shown, the utility model discloses a vortex lifting sewage treatment device, including a main pipeline 1, a dosing point, a water distributor 3, a sewage treatment device 4, a slag discharge structure, a drainage structure and a mud discharge structure;

[0038] The main pipeline 1 transports the sewage to the vortex reaction cylinder for treatment through a lifting pump; preferably, the lifting pump is a centrifugal water pump, the pump material is cast iron, cast steel, stainless steel, engineering plastic or PVC, and the pump head is 0.1-1.0MPa.

[0039] The dosing point is used to add lifting agents, coagulants and flocculants to the main line 1; the water divider 3 is arranged on the main line 1, and the sewage injected into the main line 1 is divided into multiple branches, and then injected into multiple vortex reaction cylinders inside the sewage treatment device 4; preferably, the water inlet section of each branch pipe is tangent to the cylinder body of the vortex reaction cylinder.

[0040] The slag discharge structure is arranged at the top of each vortex reaction cylinder to discharge the scum produced by sewage treatment; the water discharge structure is arranged at the bottom of each vortex reaction cylinder to discharge the purified water produced by sewage treatment; the sludge discharge structure is also arranged at the bottom of each vortex reaction cylinder to discharge the sludge produced by sewage treatment.

[0041] 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 arranged in a bypass pipeline connected to the main pipeline 1, and the ratio of the bypass pipe to the main pipeline diameter is 1:1-1:1000. During operation, the lifting agent needs to be added to the lifting agent dosing point 21 first, and then mixed with sewage through the mixing pump 22 and pumped into the main pipeline 1. The coagulant dosing point 23 and the flocculant dosing point 24 are arranged in the main pipeline 1. After the lifting agent is added, the coagulant and flocculant are added in sequence. The coagulant and flocculant dosing points are separated by 1-10 minutes. Preferably, the lifting agent is mineral oil or plastic powder, and the dosage is 30-3000PPM; the coagulant is one or more of polyaluminum chloride, polyferric sulfate, and ferric chloride, and the dosage is 30-10000PPM; the flocculant is one or more of polyacrylamide and sodium polyacrylate, and the dosage is 2-100PPM.

[0042] The sewage treatment device 4 comprises a cylindrical cylinder of a horizontal structure, which is a closed pressure-bearing container with caps at both ends, with a diameter of 0.2-3.0 m and a pressure bearing capacity of 0.1-2.0 MPa. A plurality of vortex reaction cylinders are arranged side by side in the cylinder. Preferably, a plurality of vortex guide grooves are evenly arranged on the inner wall of the vortex reaction cylinder along the circumferential direction, and the groove spacing is 0.1-1.0 m.

[0043] The slag discharge structure includes an upper mud discharge pipe 71 and a slag collector 72 arranged on the upper mud discharge pipe 71; a slag collector 72 is arranged above each vortex reaction cylinder. The slag collector 72 is a cone, and the top of the cone is a slag discharge pipe. After the slag is discharged, the slag below continuously enters the cone to achieve the purpose of collection.

[0044] The drainage structure includes a water collecting coil 61 provided below each vortex reaction cylinder and a drain pipe 62 connecting all the water collecting coils 61. The purified water generated by the vortex reaction cylinder enters the water collecting coil 61 for storage and then is discharged through the drain pipe 62. Preferably, the water collecting coil 61 is annular and has holes in the hole wall. The water outlet end of the water collecting coil 61 is connected to the drain pipe. The purified water enters the tube from the holes on the tube wall and then is discharged to the outside through the drain pipe. The diameter of the ring is 0.3-3.0m, and the diameter of the hole is 0.05-0.2m.

[0045] The mud discharge structure comprises a lower mud discharge pipe 5 arranged below the sewage treatment device 4. The mud discharge coil is a perforated coil with a hole diameter of 10-100 mm.

[0046] The sewage treatment process of the above-mentioned vortex lifting sewage treatment device includes the following steps:

[0047] S1, sewage is first lifted by the lifting pump and enters the dosing point, and the lifting agent is first added through the bypass of the dosing point, and then mixed by the mixing pump 22 and enters the main line 1, and then the coagulant is added, and then the flocculant is added after a period of time, and then through the water distributor 3, evenly distributed to each branch pipe, and then sent to the vortex reaction cylinder through the branch pipe;

[0048] S2. In the vortex reaction cylinder, the sewage is fully mixed and reacted with the lifting agent, coagulant and flocculant to form sludge;

[0049] S3, the sludge absorbs impurities in the sewage and combines with the lifting agent, vortexes and rises in the vortex reaction cylinder. After rising to the top of the vortex reaction cylinder, it enters the mud-water separation area. The sludge is lifted by the lifting agent to the top of the processor cylinder, enters the scum collector 72, and then discharged from the device through the slag discharge pipe for separate treatment;

[0050] S4, after the sewage and sludge are separated, the generated purified water enters the lower water collecting coil 61 and is transported to the subsequent equipment through the outlet pipe to complete the sewage purification;

[0051] S5. The sludge that does not float up settles to the bottom of the treatment cylinder and is discharged out of the device through the sludge discharge pipe 5 for further treatment.

[0052] The sewage treatment process of the above-mentioned vortex lifting sewage treatment device is described in detail through two embodiments below:

[0053] Example 1 (Treatment of Oily Wastewater from Gas Field)

[0054] The oily wastewater from the gas field is transported to the dosing point at a flow rate of 50m³ / h through a lift pump, and the condensate oil produced by the gas field is added to the wastewater from the lift agent dosing point 21 at a concentration of 30-1000PPM; polyaluminium chloride is added from the coagulant dosing point 23 at a dosing concentration of 30-6000PPM; polyacrylamide is added from the flocculant dosing point 24 at a dosing concentration of 2-100PPM; and then distributed to the branch pipe through the water distributor 3 and enters the vortex reaction cylinder, where it is mixed and reacted to form sludge. It rises to the top of the vortex reaction cylinder and enters the mud-water separation area of ​​the cylinder. Under the action of the lifting agent, the sludge rises to the upper part of the vortex reaction cylinder, is collected by the scum collector 72, and is discharged from the device through the slag discharge pipe to achieve mud-water separation; the sewage separated from the sludge is purified water, which is directly transported to the subsequent quartz sand filter tank through the drainage pipe 62 relying on the internal pressure of the device; the remaining sludge that is not lifted settles to the bottom of the processing cylinder and is discharged from the sludge processor through the sludge discharge pipe 5.

[0055] Table 1 is the actual detection results of various pollutants before and after the treatment of gas field oily wastewater in this embodiment (where: SS is suspended solids, OIL is oil):

[0056] Table 1 .

[0057] Embodiment 2 (wastewater treatment of food factory)

[0058] Food factory wastewater containing vegetable oil is directly discharged at 10m 3 / h flow rate is transported to the dosing point through the lifting pump, and the vegetable oil recovered from the food factory is added to the sewage at a concentration of 300-800PPM from the lifting agent addition point 21, polyaluminum chloride is added from the coagulant addition point 23, and the dosing concentration is 2000PPM, and polyacrylamide is added from the flocculant addition point 24, and the dosing concentration is 5PPM; then it is distributed to the branch pipe through the water divider 3 and enters the vortex reaction cylinder, where it is mixed and reacted to form sludge, which rises to the top of the vortex reaction cylinder by vortexing and enters the mud and water separation area of ​​the cylinder. Under the action of the lifting agent, the sludge rises to the upper part of the vortex reaction cylinder, and then is collected by the scum collector 72, and discharged to the sewage scum collection pool through the slag discharge pipe to achieve mud and water separation; the sewage separated from the sludge is purified water, which is directly transported to the subsequent quartz sand filter tank through the drainage pipe 62 relying on the internal pressure of the device; the remaining sludge that is not lifted settles to the bottom of the sewage treatment device 4 and is discharged out of the device through the sludge discharge pipe 5.

[0059] Table 2 is the actual detection results of various pollutants before and after the treatment of wastewater containing vegetable oil in this embodiment (wherein: SS is suspended solids, OIL is oil; COD: chemical oxygen demand):

[0060] Table 2

[0061] The above shows and describes the basic principle and main features of the utility model and the advantages of the utility model. Those skilled in the art should understand that the utility model is not limited by the above embodiments. The above embodiments and descriptions are only for explaining the principle of the utility model. Without departing from the spirit and scope of the utility model, the utility model may have various changes and improvements, which fall within the scope of the utility model to be protected. The scope of protection claimed by the utility model is defined by the attached claims and their equivalents.

Claims

1. A vortex lifting sewage treatment device, characterized in that: Including main pipeline, dosing point, water distributor, sewage treatment device, slag discharge structure, drainage structure and mud discharge structure; The main pipeline transports the sewage to the sewage treatment device for treatment through the lifting pump; The sewage treatment device comprises a cylindrical body of a horizontal structure, which is a closed pressure-bearing container with caps at both ends, and a plurality of vortex reaction cylinders are arranged side by side in the cylinder; a plurality of vortex guide grooves are evenly arranged on the inner wall of the vortex reaction cylinder along the circumferential direction; The dosing point is used to add a lifting agent, a coagulant and a flocculant to the main pipeline; The water divider is arranged on the main pipe, and divides the sewage injected into the main pipe into a plurality of branch pipes, and then injects the sewage into a plurality of vortex reaction cylinders inside the sewage treatment device; The slag discharge structure is arranged at the top of each vortex reaction cylinder and is used to discharge the slag generated by sewage treatment; The drainage structure is arranged at the bottom of each vortex reaction cylinder and is used to discharge the purified water generated by sewage treatment; The sludge discharge structure is also arranged at the bottom of each vortex reaction cylinder to discharge the sludge generated by sewage treatment.

2. The vortex lifting sewage treatment device according to 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 arranged in 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 sewage through the mixing pump and pumped into the main pipeline. The coagulant dosing point and the flocculant dosing point are arranged in the main pipeline. After the lifting agent is added, the coagulant and flocculant are added in sequence. The coagulant and flocculant dosing points are separated by 1-10 minutes.

3. The vortex lifting sewage treatment device according to claim 1, characterized in that: The slag discharge structure comprises an upper mud discharge pipe and a slag collector arranged on the mud discharge pipe; a slag collector is arranged above each vortex reaction cylinder.

4. The vortex lifting sewage treatment device according to claim 1, characterized in that: The drainage structure includes a water collecting coil arranged below each vortex reaction cylinder and a drainage pipe communicating with all the water collecting coils. The purified water generated by the vortex reaction cylinder enters the water collecting coil for storage and is then discharged through the drainage pipe.

5. The vortex lifting sewage treatment device according to claim 1, characterized in that: The mud discharge structure comprises a lower mud discharge pipe arranged below the sewage treatment device.

6. The vortex lifting sewage treatment device according to claim 4, characterized in that: The water collecting coil is a circular perforated pipe, and the water outlet end of the water collecting coil is connected to the drain pipe.

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