CN204563771U - Tandem sewage sedimentation tank - Google Patents

Abstract

The utility model relates to the field of sewage treatment equipment, and discloses a serial sewage sedimentation tank, which comprises a first sedimentation tank (1) and a second sedimentation tank (2) connected in series. The inner parts of the first settling tank and the second settling tank are divided into three areas: slow flow channel (6), sewage sedimentation area (7) and water outlet area (8). The slow flow channel is a tortuous flow. The upper end communicates with the water inlet, the lower end communicates with the dirt sedimentation area, the water outlet area is separated from the dirt sedimentation area by a filter (9), the water outlet area is located above the dirt sedimentation area, and the filter screen is connected with a vertical A connecting rod (10), the connecting rod extends upwards from the top of the tank body and communicates with the outside world, and the filter screen can move up and down along with the connecting rod. The slow flow structure in the tandem sewage settling tank will not impact the precipitated sediment in the settling tank; the movable filter in the tandem sewage settling tank can prevent the filter from clogging, and at the same time improve the sedimentation of sewage dirty effect.

Description

Series sewage sedimentation tank

technical field

The utility model relates to the field of sewage treatment equipment, in particular to a serial sewage sedimentation tank.

Background technique

Due to the environmental damage caused by the rapid development of China's industry in recent decades, the problem of environmental governance has gradually become prominent in recent years, and the country has paid more and more attention to environmental protection. Chinese enterprises have also restricted the discharge of industrial waste. Many enterprises have realized the purification of sewage and discharge or even recycling, which not only saves energy, but is also conducive to environmental protection

For the treatment of industrial sewage, the sewage is usually left to settle first, and then the settled sewage is treated in the next step.

Authorization announcement number CN 203724882 U, the Chinese patent of the authorization announcement date on July 23, 2014 discloses a sewage sedimentation device, including a primary sedimentation tank and a secondary sedimentation tank, and a grid is fixed in the primary sedimentation tank , the top of the grid is the water outlet area, the bottom of the grid is the first sludge sedimentation area, a sewage conveying pipe extends into the primary sedimentation tank, and the end of the sewage conveying pipe is located in the first sludge sedimentation area: The secondary sedimentation tank is fixed with a second sludge sedimentation area; it also includes a connecting pipe, one end of which is located in the water outlet area, and the other end is located in the second sludge sedimentation area, on the second tank body There is a clean water outlet located above the filter screen and connected to the clean water area. The sewage sedimentation device can realize secondary sedimentation of sewage, thereby effectively improving the water quality of clear water, thereby ensuring the effect of sewage sedimentation, and the device has a high water yield and good effect.

However, this sewage settling device also has some disadvantages: the sewage conveying pipe is arranged in the settling tank, and if the water pressure of the sewage is very high, it is easy to cause impact on the settled sludge at the bottom of the settling tank, causing the sludge to be muddy again and settling The effect is affected; in addition, the filter screen in the sedimentation tank is fixed. With the accumulation of sludge at the bottom of the sedimentation tank and the gradual increase in the concentration of sludge in the sewage at the bottom of the filter screen, on the one hand, the sludge is easy to cause damage to the filter screen. On the other hand, impurities such as sludge in the sewage, because they are too close to the filter screen, can easily penetrate the filter screen, resulting in poor water quality in the effluent area.

Utility model content

In order to solve the above-mentioned technical problems, the utility model provides a serial sewage sedimentation tank, which is provided with a slow flow structure on the water inlet channel, which will not cause impact on the precipitated sediment in the sedimentation tank; The series sewage sedimentation tank is also equipped with a movable filter screen, which can improve the sedimentation and decontamination effect of sewage.

The specific technical solution of the utility model is: a series sewage settling tank, including a first settling tank and a second settling tank connected in series, each of the first settling tank and the second settling tank is provided with a water inlet and The water outlet, the water inlet is arranged on the top of the first sedimentation tank and the second sedimentation tank respectively, and the water outlet is arranged on the upper part of the outer wall of the first sedimentation tank and the second sedimentation tank respectively. The water outlet of the first settling tank is connected with the water inlet of the second settling tank through a conduit, and a water pump is arranged on the conduit. The inner parts of the first settling tank and the second settling tank are respectively divided into three areas: a slow flow channel, a dirt sedimentation area and a water outlet area. The slow flow channel is a tortuous flow channel, and the slow flow channel The upper end communicates with the water inlet, the lower end of the slow flow channel communicates with the dirt sedimentation area, the water outlet area is separated from the dirt sedimentation area by a filter screen, the water outlet area is located above the dirt sedimentation area, and the filter screen is connected There is a vertically upward connecting rod, which extends upwards from the top of the tank and communicates with the outside world, and the filter screen can move up and down with the connecting rod.

When the utility model is in operation, the sewage enters from the water inlet of the first settling tank, and then flows into the slow flow channel in the tank body of the first settling tank. The slow-flow channel plays the role of buffering and stabilizing the flow, and the sewage flowing out of the slow-flow channel will not cause serious impact on the sewage and accumulated dirt in the dirt sedimentation area, which is beneficial to the sedimentation of the dirt. With the increase of sewage, the sewage in the first settling tank gradually increases. After the sewage in the sewage sedimentation area is left still, the sewage gradually settles. The upper layer is relatively clean sewage. When the sewage water level is higher than the filter screen, it is higher than the filter screen. The sewage in the net part is filtered by the filter net and enters the water outlet area. With the accumulation of dirt in the dirt sedimentation area, the concentration of dirt in the sewage under the filter screen gradually increases, and the filter screen gradually moves upward through the connecting rod. On the one hand, this can prevent the filter screen from being blocked by sludge, and on the other hand On the one hand, it can reduce the concentration of dirt in the sewage below the filter screen, and avoid too much small particle dirt from penetrating the filter screen, resulting in poor water quality in the water outlet area.

When the water level reaches the water outlet, the sewage in the water outlet area is pumped into the second settling tank, and the sewage is discharged from the outlet of the second settling tank after undergoing the same sedimentation and filtration process as the first settling tank in the second settling tank. Go to the next step of purification or discharge or recycling.

Preferably, the slow-flow channel is provided with a number of deflectors arranged in a stepwise staggered manner, and each of the deflectors is placed horizontally in the slow-flow channel to form a circuitous channel. The deflectors arranged in a stepped staggered manner can effectively reduce the water pressure of the sewage and slow down the flow velocity of the sewage.

Preferably, the slow flow channel is a top-down spiral conduit.

Preferably, the connecting rod is gradually displaced upwards at timing through manual control or automatic motor control.

Preferably, a transparent monitoring window is provided on the outer wall of each tank of the first sedimentation tank and the second sedimentation tank, and a scale is provided on the monitoring window. The setting of the monitoring window can facilitate the staff to observe the water level of the sewage in the sedimentation tank, the accumulation degree of the sewage, and the concentration of the sewage under the filter screen, etc., and properly control the height of the filter screen according to these information, and whether it is necessary to clean up the sewage discharge etc.

Preferably, the pore size of the filter screen of the first sedimentation tank is larger than the pore size of the filter screen of the second sedimentation tank. Since the second settling tank is a secondary settling tank, it is necessary to upgrade the filtering effect of the sewage.

Preferably, a sealing ring is provided between the filter screen and the tank wall in contact with it.

Preferably, the bottoms of the tank bodies of the first sedimentation tank and the second sedimentation tank are provided with openable sewage outlets. When the dirt accumulates too much, the dirt can be cleaned through the sewage outlet.

As a preference, the first sedimentation tank and the second sedimentation tank are respectively equipped with feeding ports on the tank body of the dirt sedimentation area. Before the sewage enters, substances such as flocculants and decontamination agents can be added to the sedimentation tank through the feeding port.

Preferably, the sewage settling tank is provided with more than two settling tanks connected in series. When two sewage settling tanks cannot meet the demand, the decontamination effect can be increased by increasing the number of sewage settling tanks.

Compared with the prior art, the beneficial effect of the utility model is: the series sewage settling tank is provided with a slow flow structure on the water inlet channel, which will not cause impact on the precipitated sediment in the settling tank; the series sewage settling tank There is also a movable filter screen, which can avoid the clogging of the filter screen and improve the sedimentation and decontamination effect of sewage.

Description of drawings

Fig. 1 is a kind of sectional view of the utility model;

Fig. 2 is an appearance view of the utility model.

Reference signs are: first sedimentation tank 1, second sedimentation tank 2, water inlet 3, water outlet 4, water pump 5, slow flow channel 6, dirt sedimentation area 7, water outlet area 8, filter screen 9, connecting rod 10. Deflector 11, motor 12, monitoring window 13, sewage outlet 14, feeding port 15.

Detailed ways

Below in conjunction with embodiment the utility model is further described.

Example 1

As shown in Figure 1 and Figure 2: a series sewage sedimentation tank, including the first sedimentation tank 1 and the second sedimentation tank 2 connected in series, the first sedimentation tank and the second sedimentation tank are equipped with A water inlet 3 and a water outlet 4, said water inlet is arranged on the top respectively of the first sedimentation tank and the second sedimentation tank, said water outlet is arranged on the top of the respective outer walls of the first sedimentation tank and the second sedimentation tank, the first The water outlet of the settling tank is connected with the water inlet of the second settling tank through a conduit, the conduit is provided with a water pump 5, and the respective inner parts of the first settling tank and the second settling tank are slow flow channels 6, dirt There are three areas of precipitation area 7 and water outlet area 8.

The slow-flow channel is provided with a number of baffles 11 arranged in a stepwise staggered manner, and each baffle is placed horizontally in the slow-flow channel to form a circuitous channel. The upper end of the slow flow channel communicates with the water inlet, the lower end of the slow flow channel communicates with the dirt sedimentation area, the water outlet area is separated from the dirt sedimentation area by a filter screen 9, and the water outlet area is located above the dirt sedimentation area , the connecting rod 10 is connected vertically upward on the filter, and the connecting rod extends upwards from the top of the tank and communicates with the outside world. The connecting rod is automatically controlled by the motor 12 to drive the filter screen to gradually move upwards.

A transparent monitoring window 13 is provided on the outer wall of each tank of the first sedimentation tank and the second sedimentation tank, and a scale is provided on the monitoring window.

The first sedimentation tank and the second sedimentation tank are respectively equipped with a feeding port 15 on the tank body of the dirt sedimentation area.

The bottoms of the tank bodies of the first sedimentation tank and the second sedimentation tank are provided with openable sewage outlets 14 .

The pore diameter of the filter screen of the first sedimentation tank is larger than that of the filter screen of the second sedimentation tank.

A sealing ring is arranged between the filter screen and the tank wall in contact with it.

Example 2

A series sewage sedimentation tank, comprising a first sedimentation tank 1 and a second sedimentation tank 2 connected in series, each of the first sedimentation tank and the second sedimentation tank is provided with a water inlet 3 and a water outlet 4, The water inlet is arranged on the top of the first sedimentation tank and the second sedimentation tank respectively, and the water outlet is arranged on the upper part of the outer wall of the first sedimentation tank and the second sedimentation tank respectively, and the water outlet of the first sedimentation tank is connected with the second sedimentation tank. The water inlet of the tank is connected through a conduit, and the conduit is provided with a water pump 5, and the inner parts of the first settling tank and the second settling tank are respectively divided into three slow-flow channels 6, a dirt settling area 7, and a water outlet area 8 area.

The slow flow channel is a top-down spiral conduit, the upper end of the slow flow channel communicates with the water inlet, the lower end of the slow flow channel communicates with the sewage sedimentation area, and the water outlet area communicates with the sewage The sedimentation area is separated by a filter screen 9, and the water outlet area is located above the sedimentation area. A vertically upward connecting rod 10 is connected on the strainer, and the connecting rod extends upwards from the top of the tank and communicates with the outside world. By observing the accumulation of dirt in the monitoring window, manually control the connecting rod to move upwards gradually.

A transparent monitoring window 13 is provided on the outer wall of each tank of the first sedimentation tank and the second sedimentation tank, and a scale is provided on the monitoring window.

The first sedimentation tank and the second sedimentation tank are respectively equipped with a feeding port 15 on the tank body of the dirt sedimentation area.

The bottoms of the tank bodies of the first sedimentation tank and the second sedimentation tank are provided with openable sewage outlets 14 .

The pore diameter of the filter screen of the first sedimentation tank is larger than that of the filter screen of the second sedimentation tank.

A sealing ring is arranged between the filter screen and the tank wall in contact with it.

Example 3

The difference between embodiment 3 and embodiment 1 is that the serial sewage settling tank of embodiment 3 has three sewage settling tanks connected in series, namely the first settling tank, the second settling tank and the third settling tank.

The above are only preferred embodiments of the present utility model, and are not intended to limit the present utility model. Any simple modifications, changes and equivalent structural transformations made to the above embodiments according to the technical essence of the present utility model still belong to The scope of protection of the technical solution of the utility model.

Claims (10)

1. Series sewage sedimentation tank, including a first sedimentation tank (1) and a second sedimentation tank (2) connected in series, each of which is provided with a water inlet (3 ) and water outlet (4), the water inlet is set on the top of the first settling tank and the second settling tank, the water outlet is set on the upper part of the outer wall of the first settling tank and the second settling tank, the first settling tank The water outlet of the tank is connected to the water inlet of the second sedimentation tank through a conduit, and a water pump (5) is provided on the conduit. channel (6), dirt sedimentation area (7) and water outlet area (8). The lower end of the channel communicates with the dirt settling area, the water outlet area is separated from the dirt settling area by a filter (9), the water outlet area is located above the dirt settling area, and the filter is connected with a vertical A rod (10), the connecting rod extends upwards from the top of the tank and communicates with the outside world, and the filter screen can move up and down along with the connecting rod. 2. The tandem sewage settling tank according to claim 1, characterized in that, the slow flow channel is provided with a number of deflectors (11) arranged in a stepped and staggered manner, each of the deflectors Placed horizontally in the flow channel to form a circuitous flow channel. 3. The series sewage settling tank according to claim 1, characterized in that, the slow flow channel is a top-down spiral conduit. 4. The tandem sewage settling tank according to claim 1, characterized in that the connecting rod is gradually displaced upwards at regular intervals through manual control or automatic control by the motor (12). 5. The tandem sewage sedimentation tank as claimed in claim 1, characterized in that, transparent monitoring windows (13) are provided on the outer walls of the respective tanks of the first sedimentation tank and the second sedimentation tank, and the monitoring windows There is a scale on it. 6 . The serial sewage sedimentation tank as claimed in claim 1 , wherein the aperture of the filter screen of the first sedimentation tank is larger than the aperture of the filter screen of the second sedimentation tank. 7 . 7. The series-type sewage settling tank according to claim 1, wherein a sealing ring is provided between the filter screen and the tank wall in contact with it. 8. The serial sewage settling tank according to claim 1, characterized in that, the bottoms of the respective tank bodies of the first settling tank and the second settling tank are provided with openable sewage outlets (14). 9. The series sewage settling tank according to claim 1, characterized in that, the first settling tank and the second settling tank are respectively equipped with feeding ports (15) on the tank body of the sewage settling area. 10. The serial sewage sedimentation tank according to any one of claims 1-9, characterized in that, the sewage sedimentation tank is provided with more than two sedimentation tanks connected in series.