Spiral-flow type sewage treatment system utilizing nanobubbles

Abstract

The utility model relates to the technical field of sewage treatment, in particular to a spiral-flow type sewage treatment system utilizing nanobubbles, which sequentially comprises a sewage container, a first-stage cyclone, a high-efficiency mixer and a multi-stage filtering device according to a sewage treatment sequence, the multi-stage filtering device is formed by alternately connecting at least one secondary cyclone and at least one ceramic membrane in series; the first-stage cyclone and the second-stage cyclone can enable sewage to enter the efficient mixer and the ceramic membrane in a cyclone posture, so that oil-containing substances in the sewage are prevented from being contacted with the inner wall of the membrane tube, the use of the membrane tube is ensured, in addition, the sewage treatment device is also provided with the nano-bubble generator, the nano-bubble generator can generate nano-bubbles, and the utilization rate of the nano-bubbles is improved. And the nano bubbles are fed into the sewage container and / or the first-stage cyclone and / or the high-efficiency mixer, so that the sewage treatment is assisted, and the sewage can be treated more efficiently.

Description

Technical Field

[0001] The utility model relates to the technical field of sewage treatment, in particular to a cyclone-type sewage treatment system utilizing nanobubbles. Background Art

[0002] With the acceleration of industrialization and urbanization, the amount of sewage generated by daily human activities is increasing. Therefore, sewage treatment has become an indispensable part of modern society.

[0003] Nowadays, traditional sewage treatment methods include physical, chemical and biological methods. Although these methods can treat conventional sewage, they are incapable of treating oil well produced water and high oil content sewage. This is reflected in at least the following phenomena:

[0004] When highly oily wastewater passes through the ceramic membrane, pollutants are easily attached to the ceramic membrane, thereby reducing the flux of the ceramic membrane and causing a decrease in filtration efficiency.

[0005] In summary, improvements need to be made. Utility Model Content

[0006] In view of the shortcomings of the existing technology, the purpose of the present invention is to provide a cyclone sewage treatment system using nanobubbles, aiming to solve the problems arising from the above-mentioned background technology.

[0007] The technical solution of the utility model is achieved as follows: a cyclone-type sewage treatment system using nanobubbles is characterized by comprising a sewage container, a primary cyclone, a high-efficiency mixer and a multi-stage filtration device in the order of sewage treatment;

[0008] Wherein, the multi-stage filtration device is composed of at least one secondary cyclone and at least one ceramic membrane alternately connected in series;

[0009] The primary cyclone and the secondary cyclone can cause the sewage to enter the high-efficiency mixer and the ceramic membrane in a cyclonic state.

[0010] Preferably, the device further comprises a nano bubble generator, which can generate nano bubbles and send the nano bubbles into the sewage container and / or the primary cyclone and / or the high-efficiency mixer.

[0011] In addition, the present invention also discloses a sewage treatment process, which uses the above-mentioned cyclone sewage treatment system using nanobubbles, and is characterized by comprising the following steps:

[0012] S1: Generate nanobubbles through a nanobubble generator and inject the nanobubbles into a sewage container. The diameter of the nanobubbles is between 50-500 nanometers and the number is 10. 8 -109 pcs / ml;

[0013] S2: Use a sewage pump to send the sewage in step S1 into a high-efficiency mixer, and continue to add nanobubbles to keep the gas-liquid ratio at 0.9-1:1;

[0014] S3: The wastewater discharged from step S2 passes through a secondary cyclone, which causes the wastewater to enter the ceramic membrane in a swirling manner. The wastewater generates air flotation in the membrane tubes of the ceramic membrane, and the tiny particles in the wastewater are gathered in the center of the membrane tubes of the ceramic membrane under the action of centrifugal force;

[0015] S4: The sewage passes through the membrane tube of the ceramic membrane and is filtered to complete water production.

[0016] Preferably, in step S2, the sewage is sent into the high-efficiency mixer in a cyclonic state through a primary cyclone.

[0017] Preferably, in step S3, the sewage rotation speed in the membrane tube of the ceramic membrane is above 500 rpm.

[0018] Preferably, the sewage that does not pass through the membrane tube of the ceramic membrane in step S3 is sent back into the sewage container in step S1.

[0019] The utility model has at least the following beneficial effects:

[0020] 1. Utilize the effects of cyclones and nanobubbles to reduce the pollution of ceramic membranes, thereby ensuring the continuous flux of ceramic membranes to ensure the sewage treatment efficiency. That is: nanobubbles are added to the sewage to cause the sewage to float. Substances that are easy to pollute the membrane, such as oil, have low density. After being guided by the high-speed rotation of the cyclone, these substances will always be in the center of the membrane tube channel of the ceramic membrane, avoiding contact with the filter layer of the ceramic membrane, thereby reducing membrane pollution.

[0021] 2. Reduce circulation volume and reduce energy consumption: Since a large amount of gas is added to the sewage, the circulation ratio of the liquid is reduced, thereby reducing the energy consumption of the pump.

[0022] 3. The existing filter design for oily wastewater requires a membrane surface flow rate of 3-6 m / s, while the utility model relies on swirl to reduce the flow of circulating water, so that the membrane surface flow rate is about 1 m / s, which can achieve normal operation of the wastewater treatment process of the utility model. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative labor.

[0024] Figure 1 It is a schematic structural diagram of a specific implementation method of the present utility model. DETAILED DESCRIPTION

[0025] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0026] like Figure 1 As shown, the utility model discloses a cyclone-type sewage treatment system using nanobubbles, which comprises a sewage container, a primary cyclone 10, a high-efficiency mixer 11 and a multi-stage filtering device in the order of sewage treatment;

[0027] The multi-stage filtration device is composed of at least one secondary cyclone 21 and at least one ceramic membrane 22 alternately connected in series. In this embodiment, it is composed of two secondary cyclones and two ceramic membranes, which can improve the filtration efficiency.

[0028] The primary cyclone 10 and the secondary cyclone 21 can cause the sewage to enter the high-efficiency mixer 11 and the ceramic membrane 22 in a cyclonic state.

[0029] In this embodiment, a nano bubble generator is further included, which can generate nano bubbles and send the nano bubbles into the sewage container and / or the primary cyclone 10 and / or the high-efficiency mixer 11.

[0030] This embodiment further provides a sewage treatment process, which uses the above-mentioned cyclone sewage treatment system using nanobubbles, and is characterized by comprising the following steps:

[0031] S1: Generate nanobubbles through a nanobubble generator and inject the nanobubbles into a sewage container. The diameter of the nanobubbles is between 50-500 nanometers and the number is 10. 8 -10 9 pcs / ml;

[0032] S2: Use a sewage pump to send the sewage in step S1 into a high-efficiency mixer, and continue to add nanobubbles to keep the gas-liquid ratio at 0.9-1:1;

[0033] S3: The wastewater discharged from step S2 passes through a secondary cyclone, which causes the wastewater to enter the ceramic membrane in a swirling manner. The wastewater generates air flotation in the membrane tubes of the ceramic membrane, and the tiny particles in the wastewater are gathered in the center of the membrane tubes of the ceramic membrane under the action of centrifugal force;

[0034] S4: The sewage passes through the membrane tube of the ceramic membrane and is filtered to complete water production.

[0035] In this embodiment: in step S2, the sewage is sent into the high-efficiency mixer in a cyclonic state through the primary cyclone.

[0036] In this embodiment: in step S3, the sewage rotation speed in the membrane tube of the ceramic membrane is above 500 rpm.

[0037] In this embodiment, the sewage that does not pass through the membrane tube of the ceramic membrane in step S3 is sent back into the sewage container in step S1.

[0038] refer to Figure 1 In this embodiment, the primary cyclone, high-efficiency mixer, and multi-stage filtration device can be assembled into one. That is, the sewage in the sewage container (such as a sewage tank) is first injected with nano-bubbles by a nanobubble generator (not shown), and then the sewage is pumped into the high-efficiency mixer through a sewage pump. During this period, the primary cyclone is also provided with nanobubbles by the nanobubble generator, so that the sewage and nanobubbles can be quickly mixed in the high-efficiency mixer.

[0039] Subsequently, the mixed sewage (at this time the gas-liquid ratio is close to 1:1) is pumped into the ceramic membrane through the secondary cyclone and filtered inside the ceramic membrane. The treatment is completed after passing through the membrane tube of the ceramic membrane. The sewage discharged from one end of the ceramic membrane returns to the sewage tank and is circulated into the high-efficiency mixer for new treatment.

[0040] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A cyclonic sewage treatment system using nanobubbles, characterized by: The method comprises, in order of sewage treatment, a sewage container, a primary cyclone (10), a high-efficiency mixer (11) and a multi-stage filtering device; The multi-stage filtering device is composed of at least one secondary cyclone (21) and at least one ceramic membrane (22) alternately connected in series; The primary cyclone (10) and the secondary cyclone (21) can cause sewage to enter the high-efficiency mixer (11) and the ceramic membrane (22) in a cyclonic state.

2. The nanobubble cyclone sewage treatment system according to claim 1, characterized in that: The invention also comprises a nano bubble generator, which can generate nano bubbles and send the nano bubbles into the sewage container and / or the primary cyclone (10) and / or the high-efficiency mixer (11).

Images