CN104326550B - Sewage treatment systems - Google Patents

Abstract

The invention relates to sewage treatment technology, in particular to a sewage treatment system for domestic sewage. The system includes: at least one sewage input pipeline, an aeration tank, a water collection tank, and at least one slope-shaped slope; a drainage pipe is connected to the aeration tank, and the drainage pipe is arranged on the top of the slope-shaped slope; The water tank is arranged at the bottom of the inclined surface; at least one sewage output pipe is connected to the bottom of the sump, and at least one filter unit is arranged between the inclined surface and the sump, Or set in the water collection tank, the sewage treatment system of the present invention can greatly reduce the setting of the pusher, and even can abandon the pusher, thus reducing the construction and maintenance costs of the sewage treatment pool.

Description

sewage treatment system

technical field

The invention relates to sewage treatment technology, in particular to a sewage treatment system for domestic sewage.

Background technique

At present, domestic sewage is mostly directly discharged into sewage pipes, and then discharged into rivers, rivers, lakes, and seas through sewage pipes. In some places, sewage is transported to sewage treatment plants, and after treatment, it is reused as reclaimed water, or discharged into rivers, rivers, lakes, and seas. Recently, some living quarters have provided septic tanks, through which sewage is infiltrated into the ground to treat sewage in this way. The above-mentioned sewage treatment method has many disadvantages: untreated sewage is discharged into rivers, rivers, lakes, and seas, directly causing water pollution. Reusing sewage after treatment in sewage treatment plants, or discharging sewage after treatment is better than direct discharge, but the cost of sewage treatment is high, and a large amount of chemical agents are used in the treatment process, which will also cause secondary pollution of water . In addition, in order to circulate reclaimed water from the sewage treatment plant back to living quarters, office buildings, hotels and other facilities, it is necessary to lay long pipelines, which is very costly.

The application number is: the invention application of 201210071565.X, which discloses a method for solving the problems of high cost and easy secondary pollution of the existing sewage treatment technology. Immediately after generation, and the processing speed is fast, so as to effectively reduce the technical problem of domestic sewage pollution to the environment.

However, there are more or less heavy metals and microorganisms in the current domestic sewage that cannot be treated by ordinary sedimentation tanks. This requires the use of biochemical treatment systems. The biochemical treatment system is mainly composed of anaerobic, anoxic, and aerobic treatment systems. , in the case of a large amount of sewage treatment, it is usually composed of anaerobic pool, anoxic pool, and aerobic pool. In the biochemical treatment pool, it is necessary to add anaerobic bacteria, aerobic bacteria, etc. to make them and the nitrogen in the sewage , phosphorus reacts to remove nutrient-rich substances; in order to make the sewage react uniformly everywhere, it is necessary to configure a pusher in the pool to keep the sewage in the pool flowing; however, because the chemical substances in the sewage pool are more active and the impurities are more Many, the environment in which the flow booster is located is very harsh. Therefore, corrosion, scaling or leakage and short circuit of the flow booster are inevitable. Therefore, not only the cost of configuring the flow booster is high, but also it is easy to damage and difficult to maintain.

The invention application with application number 201410130251.1 discloses an aeration tank with a stirring device, and the agitator is arranged in the center of the aeration tank. Although the aeration tank with this structure solves the technical problem of the uniform reaction of sewage everywhere, it needs to add a stirring device at the bottom of the tank, and the use cost is relatively high.

Contents of the invention

In order to solve the problems of high cost and easy to cause secondary pollution of the existing sewage treatment technology, the present invention provides a sewage treatment system, which can greatly reduce the number of pushers, or directly abandon the pushers, and at the same time realize Sewage flows in the sewage tank to promote biochemical reactions; thereby reducing the construction and maintenance costs of the sewage treatment tank.

The sewage treatment system provided by the present invention includes: a sewage treatment system, the system includes: at least one sewage input pipeline, an aeration tank, a sump, at least one slope-shaped slope; the aeration tank is connected with a drainage pipeline, the The drainage pipe is arranged on the top of the slope-shaped slope; the sump is arranged on the bottom of the slope-shaped slope; at least one sewage output pipe is connected to the bottom of the sump, at least one filter unit, It is arranged between the inclined surface and the sump, or in the sump, and an array of convection columns is evenly arranged in the aeration tank; the convection columns include a cover plate and a column, and the cover The board is exposed to the water surface, and the upper surface of the cover plate is made of dark metal; the column includes a mandrel and a corrosion-resistant insulation layer coated on the outside of the mandrel, the mandrel is made of metal, and the mandrel is connected above the mandrel To the upper surface of the cover plate, the bottom is connected to the bottom of the sump; the bottom of the mandrel near the pool is exposed, and the rest is covered by the corrosion-resistant insulation layer, and the bottom of the mandrel near the bottom of the sump connected with a heat sink.

The heat dissipation part is composed of a spherical thin metal surface.

The filter unit is a microporous filter medium.

The system further includes at least one chemical fiber non-woven cotton filter pad, and the chemical fiber non-woven cotton filter pad is covered on the microporous filter medium.

The system further includes a water flow dispersing device arranged between the aeration tank and the inclined surface, and the water flow dispersing device is composed of a water flow guide plate and a flow guide grid arranged on the water flow guide plate.

The inclination angle of the slope-shaped slope is 5 to 25 degrees.

The length of the slope-shaped slope is 2 to 10 meters.

Shallow protrusions are dispersedly arranged on the slope-shaped slope.

Beneficial effects: when the sewage treatment pool is in use, keep the cover plate of the convection column exposed to the water surface, and the cover plate shades the water body below, so that the sun cannot heat the area of the water body where the convection column is located, and the upper surface of the cover plate After the surface absorbs solar energy, the heat is directly transferred to the bottom of the aeration tank near the mandrel of the convection column, that is, to the bottom of the tank, so that in the aeration tank, especially near each convection column, the heat at the bottom of the aeration tank The temperature is higher than the temperature of the sewage above, which will make the water near the lower part of each convection column float up to the water surface of the aeration tank, and the cold water on the water surface will automatically sink to the bottom of the aeration tank, thus forming a strong aeration tank The convection of the water body ensures the good progress of the biochemical reaction; in this case, the setting of the flow device can be greatly reduced, and the flow device can even be abandoned, thus reducing the construction and maintenance costs of the sewage treatment tank.

Description of drawings

Fig. 1 is the structural representation of a kind of sewage treatment system of the present invention;

FIG. 2 is a schematic structural diagram of Embodiment 2 of the present invention;

Among them, 1. aeration tank; 2. diversion device; 3. slope-shaped slope; 4. water collection tank; 11. cover plate; 12. column; 13. cooling part;

detailed description

The specific implementation manners of the present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. The following examples are used to illustrate the present invention, but are not intended to limit the scope of the present invention.

A sewage treatment system, the system comprising: at least one sewage input pipeline, an aeration tank 1, and an aeration device and a sludge discharge device are arranged in the aeration tank 1; wherein, the aeration tank 1 is used to accommodate sewage to be treated; The aeration device is arranged at the bottom of the aeration tank 1, and is used to aerate the sewage to be treated; the mud discharge device is arranged under the filter device, and is used for discharging mud after the sewage is filtered; the aeration Drainage pipes are set on the pool 1, and also include a water collection tank 4 and at least one slope-shaped slope 3; the drainage pipes on the aeration tank 1 are arranged on the top of the slope-shaped slope 3; the water collection tank 4 is arranged on the slope. The bottom of the slope-shaped slope 3; at least one sewage output pipeline, the sewage output pipeline is connected to the bottom of the sump 4, at least one filter unit is arranged between the slope-shaped slope 3 and the sump 4, Or be arranged in the sump 4 . In the aeration tank 1, an array of convection columns is evenly arranged; the convection columns include a cover plate 11 and a column 12, the cover plate 11 is exposed to the water surface, and the upper surface of the cover plate 11 is made of dark metal; the column 12 includes a mandrel and a corrosion-resistant insulation layer coated on the outside of the mandrel. The mandrel is made of metal, and the upper part of the mandrel is connected to the upper surface of the cover plate 11, and the lower part is connected to the aeration tank 1. The bottom of the mandrel near the bottom of the pool is exposed, and the rest is covered by the corrosion-resistant insulation layer. The bottom of the mandrel near the aeration tank 1 is connected with a heat dissipation part 13 .

Further, the heat dissipation part 13 is composed of a spherical thin metal surface.

The filter unit is a microporous filter medium.

The system further includes a water flow dispersing device 2 arranged between the aeration tank and the slope-shaped inclined surface, and the water flow dispersing device 2 is composed of a water flow guide plate and a flow guide grid arranged on the water flow guide plate.

The inclined surface 3 and the sump 4 of the present invention can be arranged in the sewage treatment room to reduce the pollution to the surrounding air. The sewage input pipeline is used to introduce sewage into the sewage treatment room, and the sewage input pipeline can be input into the sewage treatment room from the top or side of the sewage treatment room. After the sewage enters the sewage treatment room, it spreads on a wide plane from the state of pipe bundle flow, and flows from the high end of the slope-shaped slope 3 to the low end. After the water flow is dispersed, it will flow down against the slope-shaped slope 3, and the garbage in the sewage will hang on the slope-shaped slope 3 under the action of friction with the slope-shaped slope 3, and the water will flow down the slope to further purify the garbage in the water. Effect.

The sump 4 is arranged at the bottom of the slope 3 for collecting the sewage left on the slope 3 , and the sewage output pipe is connected to the bottom of the sump 4 for discharging the sewage in the sump 4 . The length from the highest point to the lowest point of the slope-shaped slope 3 can be from 1 meter to 15 meters, or longer, and the preferred length is 2 to 10 meters. The specific length of the slope-shaped slope 3 can be specifically set according to its inclination angle and sewage flow. Generally speaking, the larger the inclination angle is, the longer the slope-shaped slope should be; the larger the water flow, the longer the slope-shaped slope 3 should be. In order to make the solid matter stranded and stay on the ground of the sewage treatment room, the inclined ground angle of the sewage treatment room should not be too large, generally it can be 1° to 30°, preferably 5° to 25°.

In yet another embodiment of the present invention, in order to make the solid matter stranded and stay on the slope-shaped slope 3, the slope-shaped slope 3 should be designed to be relatively rough, and some protrusions 14 scattered on the slope can be provided.

In another embodiment, the sewage treatment system of the present invention also includes a water flow dispersing device 2 arranged between the sewage input pipeline and the slope-shaped inclined surface 3. The diversion grille on the guide plate is composed. The diversion grille is in the shape of two upper pointed wings spreading out to both sides. Several layers are arranged from top to bottom along the water flow guide plate. The diversion of the flow grid disperses the water flow on a wider horizontal surface, and the sewage is flowing downward, and the solid matter contained in it will run aground due to contact with the slope-shaped slope 3, and stay on the slope-shaped slope 3. The water flows downward according to the slope-shaped slope 3 , thereby improving the filtering effect of the slope-shaped slope 3 .

Through the above embodiment, the solid matter in the sewage can be basically filtered out. In order to obtain cleaner treated water, a filter unit can be provided between the inclined surface 3 and the sump 4 or in the sump 4 .

Yet another embodiment of the present invention, in this embodiment, a filter unit is arranged in the sump 4, and the filter unit can be made of sand, activated carbon, or a composite filter material commonly used in water purifiers, but sand is better in consideration of cost.

In another preferred embodiment of the present invention, the filter unit may have a 3-stage filter structure, and the particle size of the filter medium in the 3-layer filter structure may decrease step by step. For example, the uppermost filter structure can use coarse sand as the filter medium, the second filter structure can use sand with moderate particles as the filter medium, and the third filter structure can use fine sand as the filter medium.

In order to obtain further cleaner water, a layer of chemical fiber non-woven cotton filter pad can be covered on the above-mentioned filter unit. Selectively use chemical fiber non-woven cotton filter pads on the filter unit. Through above-mentioned treatment, water quality has become cleaner, can directly be used as the greening water of residential area, office building, hotel, for this reason, sump 4 can connect one above-mentioned living, office facility greening special-purpose water pipe; It can be discharged into urban sewage pipes without causing major pollution. Therefore, the sump 4 can be connected to urban sewage pipes. If it is used as reclaimed water for flushing toilets, chemical bactericides can be further used for disinfection, and it can be recycled as reclaimed water after sterilization. If it is not intended to be reused, it can be discharged into urban sewage pipes after preliminary treatment. Therefore, after the sump 4, connect the reclaimed water circulation water pipeline, or connect the urban sewage pipeline. In the case of using reclaimed water for flushing toilets, it is best to set up a clean water tank after the sump, use chemical sterilizers or ultraviolet lamps to sterilize the water, and then connect it to the reclaimed water circulation pipeline.

The specific embodiments described above have further described the purpose, technical solutions and beneficial effects of the present invention in detail. It should be understood that the above descriptions are only specific embodiments of the present invention and are not intended to limit the scope of the present invention. Protection scope, within the spirit and principles of the present invention, any modification, equivalent replacement, improvement, etc., shall be included in the protection scope of the present invention.

Claims (8)

1. A sewage treatment system, said system comprising: at least one sewage input pipeline, an aeration tank, a sump, at least one slope-shaped slope; the aeration tank is connected with a drainage pipe, and the drainage pipe is arranged on the slope The top of the slope; the sump is arranged at the bottom of the slope; at least one sewage output pipeline, the sewage output pipeline is connected to the bottom of the sump, and at least one filter unit is arranged on the slope Between the water collection tank, or arranged in the water collection tank, it is characterized in that an array of convection columns is uniformly arranged in the aeration tank; the convection columns include a cover plate and a column, and the cover plate is exposed to the water surface , and the upper surface of the cover plate is made of dark metal; the column includes a mandrel and a corrosion-resistant insulation layer coated on the outside of the mandrel, the mandrel is made of metal, and the mandrel is connected above the mandrel to the The upper surface of the cover plate and the lower part are connected to the bottom of the sump; the bottom of the mandrel near the bottom of the pool is exposed, and the rest is covered by the corrosion-resistant insulation layer, and the bottom of the mandrel near the bottom of the sump is connected to a heat sink. 2. The sewage treatment system according to claim 1, characterized in that, the heat dissipation part is composed of a spherical thin metal surface. 3. The sewage treatment system according to claim 1 or 2, characterized in that the filter unit is a microporous filter medium. 4. The sewage treatment system according to claim 3, characterized in that, the system further comprises at least one chemical fiber non-woven cotton filter pad, and the chemical fiber non-woven cotton filter pad is covered on the microporous filter medium. 5. The sewage treatment system according to claim 1, characterized in that, the system further comprises a water flow dispersing device arranged between the aeration tank and the slope-shaped inclined surface, and the water flow dispersing device is composed of water flow The guide plate is composed of a guide plate and a diversion grill arranged on the water flow guide plate. 6. The sewage treatment system according to claim 1, characterized in that, the inclination angle of the slope-shaped slope is 5 to 25 degrees. 7. The sewage treatment system according to claim 1, characterized in that, the length of the slope-shaped slope is 2 to 10 meters. 8. The sewage treatment system according to claim 1, characterized in that shallow and short protrusions are dispersedly arranged on the slope-shaped slope.