CN108298686B - A purification unit for rural domestic sewage of high COD concentration - Google Patents

Abstract

The invention provides a purification treatment device for rural domestic sewage with high COD concentration, comprising two inner and outer cylinders, and the annular area between the inner cylinder wall and the outer cylinder wall is equally divided into eighteen zones from the third to the tenth. , the fourth area is a sealed gas gathering area, the same U-shaped pipe is fixed between the third area and the fourth area and the fourth area and the fifth area, the two U-shaped pipes are sealed by sewage liquid, the sixth and seventh , The eighth zone is aerobic biochemical zone, and the ninth and tenth zones are filtration and clarification zones. In the aerobic zone, the sewage and oxygen flow in the opposite direction. The sewage purification treatment device of the present invention integrates septic tanks, and can effectively treat high-concentration toilet sewage in rural areas under the premise that primary treatment equipment is generally lacking in rural areas. Its unique pneumatic mixing structure effectively improves the efficiency of microorganisms and sewage The mixing effect enhances the ability to remove COD and other pollutants, and makes full use of the pneumatically mixed gas to provide an oxygen-deficient environment and reduce energy consumption.

Description

A purification treatment device for rural domestic sewage with high COD concentration

technical field

The invention relates to a sewage treatment facility, in particular to a rural sewage purification treatment device.

Background technique

my country has a large rural population, scattered households, and a weak economic foundation. Rural sewage generally includes bathing, washing wastewater, cooking, pot washing wastewater and toilet black water, with relatively high COD content. The quality and quantity of rural sewage fluctuates greatly at different times of the day, and most rural areas lack septic tanks. Domestic sewage is randomly discharged and lacks effective treatment facilities, posing a serious threat to groundwater sources. The developed rural domestic sewage treatment devices have poor impact resistance, low volume effective utilization, insufficient microbial utilization, and low removal rates of pollutants, especially COD and total nitrogen.

SUMMARY OF THE INVENTION

In order to overcome the shortcomings of the above technical problems, the present invention provides a purification treatment device for rural domestic sewage with high COD concentration. The purification treatment device adopts a special pneumatic mixing structure and rationally uses partitions to realize the purification treatment of rural domestic sewage with high COD concentration.

To achieve the above object, the present invention adopts the following technical solutions:

A purification treatment device for rural domestic sewage with high COD concentration, comprising an inner cylinder and an outer cylinder arranged coaxially, the inner cylinder is equally divided into a first area of a septic tank and a second area of a septic tank by a baffle plate, and the inner cylinder is divided into a first area of a septic tank and a second area of The annular area between the side wall and the outer cylinder side wall is equally divided into eight areas from the third area to the tenth area by the baffle plate, wherein the third and fifth areas are oxygen-deficient areas, and the fourth area is sealed gas collection Zone, sixth, seventh and eighth zones are aerobic zones, and the ninth and tenth zones are filtration and clarification zones;

A water inlet pipe is arranged on the first area of the septic tank, and the bottom of the first area of the septic tank and the second area of the septic tank are communicated; The bottom of the fourth area, the fourth area and the fifth area are connected, and the fifth area is connected with the upper end of the sixth area; the seventh area, the eighth area, and the ninth area are respectively provided with baffles, which are realized by setting the baffles. When the sewage passes through the seventh, eighth and ninth zones, it enters from the upper end and flows out from the lower end;

U-shaped pipes with upward openings are arranged on the baffles between the third area and the fourth area and between the fourth area and the fifth area, and the U-shaped pipes are liquid-sealed by sewage; the top of the fourth area is sealed and provided with Air intake holes, through which air is introduced into the fourth zone;

The sixth zone, the seventh zone and the eighth zone are provided with an aeration pan at the bottom, and the upper part is provided with a filler hanger;

The bottom of the ninth area and the tenth area are connected, and the lower ends of the ninth area and the tenth area are provided with a filter material support plate;

The upper end of the outer side wall of the tenth zone is provided with a water outlet pipe.

The middle position of the bottom of the fourth zone is provided with a short baffle along the radial direction, the lower part of the fourth zone is equally divided, and the top of the short baffle is lower than the bottom of the U-shaped pipe.

The ninth zone is provided with an inverted L-shaped air lifter, which passes through the inner cylinder to the second zone of the septic tank. The inlet of the air lifter is located under the filter material support plate, in the shape of a bell mouth. Plumbing contour.

The baffle plate between the first area of the septic tank and the second area of the septic tank and the inner cylinder wall between the second area and the tenth area of the septic tank are provided with overflow ports of the same height. The size is consistent with the size of the water inlet pipe, and the height of the overflow port is the same as the height of the water inlet pipe.

The inner cylinder and the outer cylinder are coaxial with the same height, the diameter of the inner cylinder is 1/2 of the diameter of the outer cylinder, and the height of the inner cylinder and the outer cylinder is greater than the diameter of the outer cylinder.

The U-shaped pipe is symmetrical on both sides of the baffle, the bottom end of the U-shaped pipe is located at 1/10 of the height of the inner cylinder upwards from the bottom end of the baffle, and the height of the U-shaped pipe is 1/5 to 2/5 of the height of the inner cylinder.

Suspended fillers are placed in the third and fifth zones, soft fillers are suspended on the filler suspension racks in the sixth, seventh and eighth zones, and filter media are placed on the filter media support plates in the ninth and tenth zones.

The baffle is kept sealed with the connection between the inner cylinder wall, the outer cylinder wall and the bottom.

The height of the water distribution pipe connecting the second area and the third area of the septic tank is equal to the water outlet pipe, and the diameter of the water distribution pipe is twice the diameter of the water inlet pipe.

The height of the inlet pipe is 3-5cm higher than that of the outlet pipe.

Technical effect of the present invention: The treatment device for rural domestic sewage with high COD concentration described in the present invention adopts the design of inner and outer sleeves to reduce the dead zone of corners; The water flows out from the upper end of the second zone after being deflected by the first baffle. The inner cylinder is used as a simple septic tank, and the incoming domestic sewage is subjected to preliminary anaerobic biochemical treatment. The solidified material is decomposed at the bottom of the pool, and the hydration flows down One area, which also acts as a regulating pool, relieves the impact of water quality and quantity in different time periods; the column cavity enclosed by the inner and outer cylinder walls is divided into eight equal areas, arranged in a ring, through baffles and baffles Reasonable utilization increases the residence time of sewage in the device; a separate gas gathering area is set up, and the same U-shaped pipes are set on both sides of the gas gathering area for pneumatic mixing. The biochemical environment of the anaerobic zone not only avoids the defect of destroying the anaerobic environment in the anaerobic zone and causing short flow in most of the space in the anaerobic zone, but also can effectively use the pneumatically mixed gas to supply trace oxygen to the anoxic environment, reducing the anaerobic environment. Small energy consumption. The device for purifying and treating rural domestic sewage with high COD concentration of the present invention has the advantages of reasonable structure, low energy consumption, high treatment efficiency, and is suitable for application and popularization.

Description of drawings

The present invention will be further described below in conjunction with the accompanying drawings:

1 is a top view of a device for purifying and treating rural domestic sewage with high COD concentration according to the present invention;

2 is a perspective view of the internal structure of a device for purifying and treating rural domestic sewage with high COD concentration according to the present invention;

in:

1 inner cylinder, 2 outer cylinder, 3 first area of septic tank, 4 second area of septic tank, 5 third area, 6 fourth area, 7 fifth area, 8 sixth area, 9 seventh area, 10 Eighth zone, 11 ninth zone, 12 tenth zone, 13 water inlet pipe, 14 water distribution pipe, 15 U-shaped pipe, 16 air inlet, 17 aeration pan, 18 packing hanger, 19 air lift pipe, 20 filter material Support plate, 21 outlet pipe, 22 overflow port.

Detailed ways

In order to make the objectives, technical solutions and advantages of the present invention clearer, the present invention will be further described in detail below with reference to specific embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention, but not to limit the present invention.

Example 1

As shown in Figures 1 and 2, the top view and perspective view of the invention for the purification and treatment of rural domestic sewage with high COD concentration are respectively given. The purification treatment device shown consists of an inner cylinder 1 and an outer cylinder 2 arranged coaxially. The inner cylinder is equally divided into two areas by the partition: the first area 3 of the septic tank and the second area 4 of the septic tank, and the lower ends of the first area 3 of the septic tank and the second area 4 of the septic tank are connected. The annular area between the inner cylinder wall and the outer cylinder wall is equally divided into eight zones by eight baffles: the third zone 5, the fourth zone 6, the fifth zone 7, the sixth zone 8, the seventh zone 9, the first zone. Eighth District 10, Ninth District 11 and Tenth District 12,

The second area 4 and the third area 5 of the septic tank are connected through the water distribution pipe 14 at the upper end, the third area 5 is connected with the bottom of the fourth area 6, the fourth area 6 is connected with the bottom of the fifth area 7, and the fifth area 7 and the The upper part of the six zones 8 is communicated, the bottom of the sixth zone 8 is communicated with the upper part of the seventh zone 9 through the sixth baffle plate and the baffle plate of the seventh zone, and the bottom of the seventh zone 9 is connected to the upper part of the seventh zone 9 through the seventh baffle plate and the baffle plate of the eighth zone 10. The baffle is communicated with the upper part of the eighth zone 10 , the bottom of the eighth zone 10 is communicated with the upper part of the ninth zone 11 through the eighth baffle plate and the baffle plate of the ninth zone, and the bottom of the ninth zone 11 is communicated with the bottom of the tenth zone 12 . The arrangement of the baffle plate realizes that the sewage enters from the upper end and flows out from the lower end when passing through the seventh zone 9 , the eighth zone 10 and the ninth zone 11 .

The inner and outer cylinders at the upper end of the sixth area 8 are provided with water inlets, and a water inlet pipe 13 is arranged on the water inlet. 3. The outer cylinder at the upper end of the tenth zone 12 is provided with a water outlet pipe 21, and the sewage enters the first zone 3 of the septic tank, the second zone 4 of the septic tank, the third zone 5, the fourth zone 6, and the first zone of the septic tank after entering the water inlet pipe 13. The fifth zone 7, the sixth zone 8, the seventh zone 9, the eighth zone 10, the ninth zone 11 and the tenth zone 12 are discharged from the water outlet pipe 21 after purification.

The upper part of the baffle plate of the first zone 3 of the septic tank and the second zone 4 of the septic tank and the upper part of the inner cylinder wall between the second zone 4 of the septic tank and the tenth zone 12 are provided with overflow openings 22 to prevent accidents such as clogging When the situation occurs, the sewage is directly discharged.

The fourth area 6 is shown as a sealed gas collecting area, and the U-shaped tube 15 is arranged on the partition between the fourth area 6 and the third area 5 and the partition between the fourth area 6 and the fifth area 7. The top of the area 6 and the surrounding area above the U-shaped pipe 15 are sealed, and the air inlet 16 is left at the top, and the air is introduced into the air through the air inlet 16 by the air pump. Consistently, when the air enters, the liquid level decreases, and after reaching the bottom of the U-shaped pipe 15, the air pressure is released to the third area 5 and the fifth area 7 through the U-shaped pipes 15 on both sides. After the pressure is reduced, the third area 5 and the fifth area The sewage in zone 7 pours into the fourth zone 6 for another mixing. The liquid level in the fourth zone 6 rises to the height of the nozzle of the U-shaped pipe 15 and then decreases again; in the middle of the bottom of the fourth zone 6, along the radius There is a short baffle with a height lower than the end of the U-shaped pipe in the direction, which can reduce the short-flow phenomenon of sewage in the fourth area during the descending process of the liquid level. The gas is released from the U-shaped tube on one side.

The third area 5 and the fifth area 7 are shown as anoxic areas, with built-in suspended fillers, and a small amount of oxygen is supplied by the gas released during the pneumatic mixing process. The frequency of pneumatic mixing should be reasonably controlled according to the sludge settling ratio and anoxic conditions.

The shown sixth zone 8, seventh zone 9, and eighth zone 10 are aerobic biochemical zones, and each zone is provided with a packing hanger 18 and an aeration plate 17; the oxygen required for the aerobic zone is provided by the aeration plate 17 at the bottom, and the The aeration of the air pan needs to be uniform; the soft filler is hung on the filler hanger 18 for the attachment and growth of microorganisms to realize the contact oxidation of sewage. Large, not easy to block, not easy to agglomerate and other characteristics; sewage in the aerobic zone is in reverse contact with the gas through the action of baffles and baffles.

The ninth zone 11 and the tenth zone 12 are filtration and clarification zones. The bottom of the ninth zone 11 and the tenth zone 12 is provided with a filter material support plate 20 , and the filter material support plate 20 is provided with filter material.

The ninth area 11 shown is provided with an air lift pipe 19, which is in an inverted L shape. The inlet of the air lift pipe 19 is below the filter material support plate 20, in the shape of a bell mouth, and the outlet is in the second area 4 of the septic tank. The air lift pipe 19 The outlet of the air-lifting pipe is the same height as the water inlet pipe, the air-intake pipe of the air-lifting pipe 19 enters the air-lifting pipe at a distance of 2 cm upward from the inlet along the outer pipe wall, and the air-pipe outlet is arranged upward in the air-lifting pipe, after being filtered by the ninth area 11 A part of the sewage is returned to the second zone 4 of the septic tank through the stripping pipe, and then enters the third zone 5 and the fifth zone 7 for anoxic denitrification treatment to reduce the total nitrogen content.

The U-shaped tubes 15 shown are symmetrically distributed on both sides of the corresponding partitions. The size and height of the two U-shaped tubes should be consistent. The height of the U-shaped pipe is 1/5 to 2/5 of the height of the inner cylinder.

When the sewage is purified, it first enters the first zone 3 of the septic tank and the second zone 4 of the septic tank for anaerobic fermentation and precipitation, the solidified material is decomposed at the bottom of the pond, and the upper hydrated object enters the third zone 5 and the fifth zone 7 for anaerobic fermentation and precipitation. Denitrification, there are suspended fillers in the third zone 5 and the fifth zone 7, the sewage and the microorganisms are fully contacted by the pneumatic mixing action of the U-shaped pipe 15, the nitrate nitrogen in the water is converted into nitrogen, and the organic matter is further degraded; sixth 8 , 7th, 9th, and 8th zone 10 are aerobic environments, microorganisms adhere and grow on the soft filler, aeration plate 17 provides oxygen, carries out nitrification reaction, and further degrades organic matter, ninth zone 11 and tenth zone 12 are stacked Filter material, the sewage in the ninth zone 11 flows from top to bottom, part of the filtered sewage is returned to the second zone 4 of the septic tank through the air lift pipe 19 for reprocessing, and a part is filtered through the tenth zone 12. Outlet discharge. The effluent can be used for toilet flushing, irrigation, or directly infiltrated into the ground; the microorganisms in the purification tank mostly exist in the form of biofilms, so the amount of mud produced is small, and the sludge removal cycle is long, but the septic tank needs to be cleaned regularly.

The above detailed description describes the basic principles and main features of the present invention. Those skilled in the art should understand that the protection scope of the present invention is not limited by the above-mentioned embodiments, and any changes or substitutions that are not thought of through creative work should be included within the protection scope of the present invention. Therefore, the protection scope of the present invention should be based on the protection scope defined by the claims.

Claims (10)

1. a purification treatment device that is used for high COD concentration rural domestic sewage, comprises inner cylinder and outer cylinder that are coaxially arranged, it is characterized in that, inner cylinder is divided into septic tank first district and septic tank equally by baffle plate In the second area, the annular area between the inner cylinder side wall and the outer cylinder side wall is equally divided into eight areas from the third area to the tenth area by the baffle plate. The fourth zone is the sealed gas gathering zone, the sixth, seventh and eighth zones are aerobic zones, and the ninth and tenth zones are filtration and clarification zones; A water inlet pipe is arranged on the first area of the septic tank, and the bottom of the first area of the septic tank and the second area of the septic tank are communicated; The bottom of the fourth area, the fourth area and the fifth area are connected, and the fifth area is connected with the upper end of the sixth area; the seventh area, the eighth area, and the ninth area are respectively provided with baffles, which are realized by setting the baffles. When the sewage passes through the seventh, eighth and ninth zones, it enters from the upper end and flows out from the lower end; U-shaped pipes with upward openings are arranged on the baffles between the third area and the fourth area and between the fourth area and the fifth area, and the U-shaped pipes are liquid-sealed by sewage; the top of the fourth area is sealed and provided with Air intake holes, through which air is introduced into the fourth zone; The sixth zone, the seventh zone and the eighth zone are provided with an aeration pan at the bottom, and the upper part is provided with a filler hanger; The bottom of the ninth area and the tenth area are connected, and the lower ends of the ninth area and the tenth area are provided with a filter material support plate; The upper end of the outer side wall of the tenth zone is provided with a water outlet pipe. 2. a kind of purification treatment device for high COD concentration rural domestic sewage as claimed in claim 1 is characterized in that, the middle position of the bottom of the fourth area is provided with a short baffle along the radial direction, and the lower part of the fourth area is divided into equal parts , the top of the short baffle is lower than the bottom of the U-shaped tube. 3. a kind of purification treatment device for high COD concentration rural domestic sewage as claimed in claim 1 is characterized in that, the ninth district is provided with inverted L-shaped air lift pipe, and the air lift pipe passes through the inner tube to reach the septic In the second area of the pool, the air lift pipe inlet is located below the filter material support plate, in the shape of a bell mouth, and the height of the air lift pipe outlet is the same as the water inlet pipe. 4. a kind of purification treatment device for high COD concentration rural domestic sewage as claimed in claim 1 is characterized in that, the baffle plate and the septic tank between the septic tank first area and the septic tank second area The inner cylinder wall between the second area and the tenth area is provided with overflow ports of the same height. 5. a kind of purification treatment device for high COD concentration rural domestic sewage as claimed in claim 1, is characterized in that, inner cylinder and outer cylinder are coaxial and equal height, and inner cylinder diameter is 1/2 of outer cylinder diameter, The height of the inner cylinder and the outer cylinder is greater than the diameter of the outer cylinder. 6. a kind of purification treatment device for high COD concentration rural domestic sewage as claimed in claim 1 is characterized in that, U-shaped pipe is symmetrical on both sides of baffle plate, and U-shaped pipe bottom end is located at the bottom end of baffle plate upward 1 . /10 At the height of the inner cylinder, the height of the U-shaped pipe is 1/5 to 2/5 of the height of the inner cylinder. 7. a kind of purification treatment device for high COD concentration rural domestic sewage as claimed in claim 1 is characterized in that, in the 3rd, the 5th district, put the suspended filler, in the 6th, 7th, the 8th district Soft fillers are hung on the filler hanger, and filter materials are placed on the filter material support plates of the ninth and tenth zones. 8 . The device for purifying and treating rural domestic sewage with high COD concentration according to claim 1 , wherein the baffle is kept sealed with the inner cylinder wall, the outer cylinder wall and the junction of the bottom. 9 . 9. a kind of purification treatment device for high COD concentration rural domestic sewage as claimed in claim 1, is characterized in that, the water distribution pipe and the water outlet pipe height that communicates the second district and the third district of the septic tank are equal, and the water distribution pipe is equal in height. The diameter of the pipe is 2 times the diameter of the inlet pipe. 10 . The purification treatment device for rural domestic sewage with high COD concentration according to claim 1 , wherein the height of the water inlet pipe is 3-5 cm higher than that of the water outlet pipe. 11 .

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