A treatment system for industrial wastewater before microbial decomposition

Abstract

The present invention provides a treatment system for industrial wastewater before microbial decomposition, which belongs to the field of environmental protection technology. It includes a multi-stage sedimentation tower and a water curtain type flotation device. The multi-stage sedimentation tower includes a tower body, a water inlet pipe, a water outlet pipe and a plurality of sedimentation units longitudinally distributed in the tower body. The sedimentation unit includes a sedimentation barrel with an upper opening and a water collecting cone located below the sedimentation barrel. The large diameter end of the water collecting cone faces upward, and the water outlet end of the water inlet pipe is located in the sedimentation barrel of the uppermost sedimentation unit. A row of mud pipes is arranged at the bottom of the sedimentation barrel; the water curtain type flotation device includes a plurality of explosion pools arranged alternately in the longitudinal direction, and gas foam collection tanks are arranged on both sides of the explosion pool. A downpipe is arranged at the bottom of the explosion pool; valves are arranged on the downpipe and the mud discharge pipe; the treatment system also includes a water pump, which sends the water discharged from the water outlet pipe to the explosion pool at the top of the water curtain type flotation device. The present invention has the advantages of being able to effectively reduce the alcohol content in the waste gas.

Description

Technical Field

[0001] The invention belongs to the technical field of environmental protection and relates to a treatment system for industrial wastewater before it is decomposed by microorganisms. Background Art

[0002] Alcohol is widely used in industry, especially for pharmaceutical companies. Industrial alcohol is frequently used, resulting in a certain amount of alcohol in industrial wastewater. Microbial decomposition is an intermediate link in the treatment of most industrial wastewater. In the prior art, industrial raw water is generally subjected to microbial decomposition after sedimentation and gas explosion. However, due to the inhibitory effect of alcohol on biological bacteria, the reproduction, reproduction efficiency and colony density of biological bacteria are limited, which directly affects the efficiency and quality of microbial treatment. In addition, industrial wastewater generally adopts an open environment during sedimentation and gas explosion, and the gas emitted by the wastewater cannot be well recovered, causing environmental pollution. This is also a disadvantage of the existing industrial wastewater treatment process before microbial decomposition. Summary of the invention

[0003] The purpose of the present invention is to provide a treatment system for industrial wastewater before microbial decomposition in order to solve the above-mentioned problems existing in the prior art. The technical problem to be solved by the present invention is how to carry out alcohol spillage treatment before wastewater microbial treatment to avoid the inhibition of microbial reproduction by excessive alcohol content.

[0004] The object of the present invention can be achieved through the following technical solutions: a treatment system for industrial wastewater before microbial decomposition, characterized in that it includes a multi-stage sedimentation tower and a water curtain type air flotation device, the multi-stage sedimentation tower includes a tower body, a water inlet pipe, a water outlet pipe and a plurality of sedimentation units longitudinally distributed in the tower body, the sedimentation unit includes a sedimentation barrel with an upper opening and a water collecting cone located below the sedimentation barrel, the large diameter end of the water collecting cone faces upward, the diameter of the large diameter end of the water collecting cone is larger than the outer diameter of the sedimentation barrel, the diameter of the small diameter end of the water collecting cone is smaller than the inner diameter of the sedimentation barrel, the water outlet end of the water inlet pipe is located in the sedimentation barrel of the uppermost sedimentation unit, a row of mud pipes is arranged at the bottom of the sedimentation barrel, the water collecting cone is connected to the inner wall of the tower body through a hollow mounting plate, the inner wall of the water collecting cone is fixedly connected to the outer wall of the sedimentation barrel through a plurality of spokes, an air collecting pipe is arranged on the top of the tower body, and the water collecting cone of the lowermost sedimentation unit is connected to the water outlet pipe;

[0005] The water curtain type air flotation device comprises a plurality of aeration tanks arranged alternately in the longitudinal direction, both sides of the aeration tanks are provided with air foam collection tanks, and the bottom of the aeration tanks is provided with a water pipe;

[0006] The down pipe and the mud discharge pipe are both provided with valves;

[0007] The treatment system also includes a water pump, which delivers the water discharged from the water outlet pipe to the aeration tank at the top of the water curtain type air flotation device.

[0008] Furthermore, the water inlet pipe passes through all water collecting cones and all sedimentation barrels from bottom to top.

[0009] Furthermore, an anti-floating cover located in the sedimentation barrel is fixedly provided on the outer wall of the water inlet pipe. The anti-floating cover is in a conical shape, with the large diameter end of the anti-floating cover facing downward, and the diameter of the large diameter end of the anti-floating cover is smaller than the inner diameter of the sedimentation barrel.

[0010] Furthermore, a water receiving inner pool with a sealed bottom is provided in the aeration tank, and the water receiving inner pool comprises a water receiving hopper and an exhaust net located below the water receiving hopper.

[0011] Furthermore, the exhaust net is in the shape of an outwardly convex curved surface.

[0012] Furthermore, a slag discharge pipe is connected between each gas-foam collecting groove on the same side, and the slag discharge pipe is provided with an inlet corresponding to each gas-foam collecting groove.

[0013] Compared with traditional sedimentation tanks, the tower-structured multi-stage sedimentation device not only occupies a smaller area, but can also effectively collect the dissipated waste gas including alcohol, reduce the alcohol content in the wastewater, and facilitate the subsequent cultivation and reproduction of biological bacteria.

[0014] The water curtain type air flotation device adopts the natural dissolved air method, avoiding the use of pressurized dissolved air equipment, and also further volatilizes the alcohol. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a structural diagram of this processing system.

[0016] Figure 2 It is a structural schematic diagram of a multi-stage sedimentation tower.

[0017] Figure 3 It is a structural schematic diagram of a water curtain type air flotation device.

[0018] Figure 4 It is a schematic diagram of the three-dimensional structure of two aeration tanks.

[0019] Figure 5 It is a schematic diagram of the three-dimensional structure of a precipitation unit.

[0020] Figure 6 yes Figure 2 Enlarged view of part A in the figure.

[0021] Figure 7 yes Figure 3 Enlarged view of part B in the middle.

[0022] In the figure, 11, tower body; 12, water inlet pipe; 13, water outlet pipe; 14, sedimentation barrel; 15, water collecting cone; 16, mud discharge pipe; 17, mounting plate; 18, air collecting pipe; 2, anti-floating cover; 31, aeration tank; 32, air foam collection tank; 33, sewer pipe; 34, slag discharge pipe; 4, water receiving inner pool; 41, water receiving bucket; 42, exhaust net. DETAILED DESCRIPTION

[0023] The following are specific embodiments of the present invention and the accompanying drawings to further describe the technical solution of the present invention, but the present invention is not limited to these embodiments.

[0024] like Figure 1-7 As shown, the treatment system of industrial wastewater before microbial decomposition includes a multi-stage sedimentation tower and a water curtain type air flotation device. The multi-stage sedimentation tower includes a tower body 11, a water inlet pipe 12, a water outlet pipe 13 and a plurality of sedimentation units longitudinally distributed in the tower body 11. The sedimentation unit includes a sedimentation barrel 14 with an upper opening and a water collecting cone 15 located below the sedimentation barrel 14. The large diameter end of the water collecting cone 15 faces upward, and the diameter of the large diameter end of the water collecting cone 15 is larger than the outer diameter of the sedimentation barrel 14. The small diameter end of the water collecting cone 15 is The diameter of the end is smaller than the inner diameter of the sedimentation barrel 14, the water outlet end of the water inlet pipe 12 is located in the sedimentation barrel 14 of the uppermost sedimentation unit, a row of mud pipes 16 is arranged at the bottom of the sedimentation barrel 14, the water collecting cone 15 is connected to the inner wall of the tower body 11 through a hollow mounting plate 17, the inner wall of the water collecting cone 15 is fixedly connected to the outer wall of the sedimentation barrel 14 through a plurality of spokes, an air collecting pipe 18 is arranged on the top of the tower body 11, and the water collecting cone 15 of the lowermost sedimentation unit is connected to the water outlet pipe 13;

[0025] The water curtain type air flotation device comprises a plurality of aeration tanks 31 arranged alternately in the longitudinal direction, both sides of the aeration tanks 31 are provided with air foam collecting tanks 32, and a water pipe 33 is provided at the bottom of the aeration tanks 31;

[0026] Valves are provided on the down pipe 33 and the mud discharge pipe 16;

[0027] The treatment system further comprises a water pump, which delivers the water discharged from the water outlet pipe 13 to the aeration tank 31 at the top of the water curtain type air flotation device.

[0028] After being intercepted and filtered by the preliminary grid, the industrial wastewater is sent to the sedimentation barrel 14 of the topmost sedimentation unit, and is discharged from the outlet pipe 13 after sedimentation in each sedimentation unit from top to bottom. During the sedimentation process, the water supply speed needs to be slow, and the wastewater overflowing the sedimentation barrel 14 flows along the upper edge of the sedimentation barrel 14 to the water collection cone 15 below it, and under the guidance of the water collection cone 15, it enters the next sedimentation barrel 14, and so on, the wastewater collected by the last water collection cone 15 can be recycled, and the sludge and other materials deposited at the bottom of the sedimentation barrel 14 are discharged to the outside of the tower body 11 through the sludge discharge pipe 16, and each sludge discharge pipe 16 is connected in parallel to a main pipe, and the sludge is recycled by the main pipe.

[0029] Tower sedimentation can not only collect waste gas including alcohol, avoid waste gas pollution, greatly increase the volatilization area, improve the volatilization efficiency of alcohol-like volatile substances, reduce the alcohol content in wastewater, but also greatly reduce the footprint of wastewater sedimentation equipment.

[0030] The wastewater coming out of the bottom water collecting cone 15 is sent to the top aeration tank 31 after adding auxiliary drugs such as coagulants, and flotation is carried out to remove slag by natural water curtain. Air is dissolved in the process of wastewater falling and impacting, and then it escapes to form a flotation effect on the wastewater.

[0031] During the flotation process, it is necessary to ensure that the water discharge speed of the downcomer 33 is consistent with the water inlet speed of the inlet pipe 12, and the liquid level in the aeration tank 31 needs to be maintained close to full, so that the scum in the flotation process can enter the air foam collection tank 32 from both sides.

[0032] The water inlet pipe 12 passes through all the water collecting cones 15 and all the sedimentation tanks 14 from bottom to top.

[0033] The outer wall of the water inlet pipe 12 is fixedly provided with an anti-floating cover 2 located in the sedimentation barrel 14. The anti-floating cover 2 is in a conical shape, with the large diameter end of the anti-floating cover 2 facing downward, and the diameter of the large diameter end of the anti-floating cover 2 is smaller than the inner diameter of the sedimentation barrel 14. The anti-floating cover 2 can reduce the upward flow of sediment during the impact of water flow, thereby improving the efficiency and effect of sedimentation.

[0034] A closed bottom water receiving pool 4 is provided in the aeration pool 31. The water receiving pool 4 includes a water receiving bucket 41 and an exhaust net 42 located below the water receiving bucket 41. The exhaust net 42 is in the shape of a convex curved surface. The position where the wastewater enters is the water receiving bucket 41 of the water receiving pool 4. The shape of the water receiving bucket 41, which is large at the upper end and small at the lower end, forms an irreversible structure for gas. That is, after the wastewater containing gas enters the water receiving bucket 41, due to the impact of the water flow and the gradual contraction of the diameter of the water receiving bucket 41, it is not easy for the bubbles to escape upward from the water receiving bucket 41, but will be flushed into the exhaust net 42. The exhaust net 42 is a convex curved surface, which provides conditions for the bubbles to escape from bottom to top, so that the bubbles can be retained in the water as much as possible and escape from the outside of the water receiving pool 4. Under the guidance of the outer wall of the water receiving bucket 41, the gas foam can be collected in the direction of the gas foam collection groove 32 on both sides of the water receiving bucket 41.

[0035] A slag discharge pipe 34 is connected between each of the gas-foam collecting grooves 32 on the same side, and an inlet corresponding to each of the gas-foam collecting grooves 32 is opened on the slag discharge pipe 34 .

[0036] This flotation structure can also increase the evaporation area of ​​wastewater, improve the alcohol volatilization efficiency, and reduce the alcohol content in wastewater.

[0037] The specific embodiments described herein are merely examples of the spirit of the present invention. Those skilled in the art may make various modifications or additions to the specific embodiments described or replace them in similar ways, but they will not deviate from the spirit of the present invention or exceed the scope defined by the appended claims.

Claims

1. A treatment system for industrial wastewater before microbial decomposition, characterized in that: The invention comprises a multi-stage sedimentation tower and a water curtain type air flotation device, wherein the multi-stage sedimentation tower comprises a tower body (11), a water inlet pipe (12), a water outlet pipe (13) and a plurality of sedimentation units longitudinally distributed in the tower body (11), wherein the sedimentation unit comprises a sedimentation barrel (14) with an opening at the upper end and a water collecting cone (15) located below the sedimentation barrel (14), wherein the large diameter end of the water collecting cone (15) faces upward, the diameter of the large diameter end of the water collecting cone (15) is larger than the outer diameter of the sedimentation barrel (14), and the diameter of the small diameter end of the water collecting cone (15) is smaller than the outer diameter of the sedimentation barrel (14). The inner diameter of the water inlet pipe (12) is located in the sedimentation barrel (14) of the uppermost sedimentation unit, a row of mud pipes (16) is arranged at the bottom of the sedimentation barrel (14), the water collecting cone (15) is connected to the inner wall of the tower body (11) through a hollow mounting plate (17), the inner wall of the water collecting cone (15) and the outer wall of the sedimentation barrel (14) are fixedly connected through a plurality of spokes, an air collecting pipe (18) is arranged at the top of the tower body (11), and the water collecting cone (15) of the lowermost sedimentation unit is connected to the water outlet pipe (13); The water curtain type air flotation device comprises a plurality of aeration tanks (31) arranged alternately in a longitudinal direction, both sides of the aeration tanks (31) are provided with air foam collection tanks (32), and the bottom of the aeration tanks (31) is provided with a water pipe (33); The down pipe (33) and the mud discharge pipe (16) are both provided with valves; The treatment system also includes a water pump, which delivers the water discharged from the water outlet pipe (13) to the aeration tank (31) at the top of the water curtain type air flotation device; A water receiving inner tank (4) with a sealed bottom is arranged in the aeration tank (31), and the water receiving inner tank (4) comprises a water receiving hopper (41) and an exhaust net (42) located below the water receiving hopper (41); The exhaust net (42) is in the shape of an outwardly convex curved surface.

2. The system for treating industrial wastewater before microbial decomposition according to claim 1, characterized in that: The water inlet pipe (12) passes through all water collecting cones (15) and all sedimentation barrels (14) from bottom to top.

3. A treatment system for industrial wastewater before microbial decomposition according to claim 2, characterized in that: The outer wall of the water inlet pipe (12) is fixedly provided with an anti-floating cover (2) located in the sedimentation barrel (14); the anti-floating cover (2) is in a conical shape, with the large diameter end of the anti-floating cover (2) facing downwards, and the large diameter end of the anti-floating cover (2) is smaller than the inner diameter of the sedimentation barrel (14).

4. A treatment system for industrial wastewater before microbial decomposition according to claim 1, 2 or 3, characterized in that: A slag discharge pipe (34) is connected between each gas foam collection groove (32) located on the same side, and the slag discharge pipe (34) is provided with an inlet corresponding to each gas foam collection groove (32).

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