Integrated delayed aeration system

Abstract

The utility model belongs to the technical field of sewage treatment equipment, and discloses an integrated delayed aeration system which comprises a treatment tank, an anoxic zone, an aerobic zone and a settling zone are arranged in the treatment tank, a liquid inlet pipeline is connected above the anoxic zone, a constant flow water outlet hole is formed between the aerobic zone and the settling zone, and a water outlet pipeline is connected above the liquid inlet pipeline. The upper part of the settling zone is connected with a liquid outlet pipeline, the upper part of the treating pond is provided with an air blower, the air outlet end of the air blower is connected with an air guide pipeline, the air guide pipeline extends into the aerobic zone, and the air outlet end of the air guide pipeline is provided with an aerator. Outlet water and return sludge of the sedimentation tank are mixed and denitrified in the anoxic zone and then enter the aerobic zone from the bottom, the aeration head is installed in the aerobic zone, gas and water are mixed for biochemical reaction, the outlet water overflows into the sedimentation zone from the constant-flow water outlet hole in the top, mud-water separation is carried out, and finally clear water overflows and is discharged from the top, so that the cost is saved.

Description

Technical Field

[0001] The utility model belongs to the technical field of sewage treatment equipment, and specifically relates to an integrated delayed aeration system. Background Art

[0002] In recent years, with the development of economy and science and technology, while large-scale sewage treatment plants serve urban areas with concentrated populations, small-scale sewage treatment equipment systems have gradually matured. Integrated sewage treatment equipment integrates the processes of large-scale sewage treatment plants to adapt to the needs of diversified sewage treatment systems. According to relevant regulations, sewage that cannot be included in the urban sewage collection system must be treated on-site and then discharged in compliance with standards. In places that are separated from large-scale sewage treatment systems, integrated sewage treatment equipment has a high space for development and application.

[0003] Most existing small-scale sewage treatment plants use a combination of regulating tanks and integrated sewage treatment equipment, where the regulating tank is mainly used to regulate water quality and quantity. Since the amount of water flowing into small-scale sewage treatment plants fluctuates greatly, the regulating tank has a long retention time and high cost. In order to save investment, no stirring device is installed, so regular dredging is required, which is difficult and poses safety risks. Utility Model Content

[0004] The purpose of the utility model is to provide an integrated delayed aeration system to solve the problem that the amount of water flowing into a small sewage treatment plant mentioned in the above background technology fluctuates greatly, so the retention time in the regulating tank is long and the cost is high, and in order to save investment, no stirring device is provided, so regular dredging is required, dredging is difficult and there are safety risks.

[0005] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: an integrated delayed aeration system, comprising: a treatment pool, wherein an anoxic zone, an aerobic zone and a sedimentation zone are provided in the treatment pool, a liquid inlet pipe is connected above the anoxic zone, a constant flow water outlet hole is provided between the aerobic zone and the sedimentation zone, a liquid outlet pipe is connected above the sedimentation zone, a blower is installed above the treatment pool, an air outlet end of the blower is connected to an air guide pipe, the air guide pipe extends into the aerobic zone, an aerator is installed at the air outlet end of the air guide pipe, an air inlet end of the blower is connected to an air inlet pipe, and a filter assembly is installed on the air inlet pipe.

[0006] Preferably, the filter assembly includes a filter pipe, a filter element and filter holes, the filter pipe is installed on the air inlet end of the air inlet pipe, the inner wall of the filter pipe is provided with a threaded groove, the outer wall of the air inlet pipe is provided with an external thread, the filter element is installed in the filter pipe, and the filter holes are provided on the filter pipe.

[0007] Preferably, a sludge pump is installed at the bottom end of the sedimentation zone, a feed pipe is connected to the sludge pump, a discharge end of the sludge pump is connected to a material guide pipe, the discharge end of the material guide pipe is connected to a sludge discharge pipe and a sludge return pipe through a tee, the discharge end of the sludge return pipe is located above the anoxic zone, and the discharge end of the sludge discharge pipe extends outside the treatment tank.

[0008] Preferably, a residual sludge discharge valve is installed on the sludge discharge pipeline, and a sludge return flow control valve is installed on the sludge return flow pipeline.

[0009] Preferably, a basket grille is installed on the treatment pool, and the basket grille is installed outside the liquid outlet end of the liquid inlet pipe.

[0010] Preferably, a water outlet weir is installed above the sedimentation zone, and the water outlet weir is installed outside the liquid inlet end of the liquid outlet pipe.

[0011] Compared with the prior art, the beneficial effects of the utility model are:

[0012] (1) The utility model treats sewage by setting anoxic zones, aerobic zones and sedimentation zones. When in use, the effluent is mixed with the return sludge of the sedimentation tank in the anoxic zone for denitrification, and then enters the aerobic zone from the bottom. The aerobic zone is equipped with an aeration head, where the gas and cement are mixed for biochemical reaction. The effluent overflows from the top constant flow outlet hole into the sedimentation zone, where mud and water are separated, and finally the clean water overflows from the top to be discharged, thereby shortening the residence time and saving costs.

[0013] (2) The utility model processes sludge by providing a sludge pump, a sludge return pipe and a sludge discharge pipe. When in use, the sludge pump returns the sludge to the anoxic zone through the sludge return pipe, and regularly opens the residual sludge discharge valve so that the sludge is regularly discharged from the sludge discharge pipe. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a schematic diagram of the structure of the utility model;

[0015] Figure 2 This is a schematic diagram of the structure of the filter pipeline of the utility model;

[0016] Figure 3 It is a structural schematic diagram of the water outlet weir of the utility model;

[0017] In the figure: 1, treatment tank; 2, liquid inlet pipe; 3, anoxic zone; 4, aerobic zone; 5, sedimentation zone; 6, basket grille; 7, blower; 8, air guide pipe; 9, aerator; 10, air inlet pipe; 11, filter pipe; 12, filter element; 13, filter hole; 14, thread groove; 15, external thread; 16, constant flow water outlet; 17, sludge pump; 18, feed pipe; 19, feed pipe; 20, sludge discharge pipe; 21, sludge return pipe; 22, residual sludge discharge valve; 23, sludge return control valve; 24, liquid outlet pipe; 25, water outlet weir. DETAILED DESCRIPTION

[0018] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0019] See also Figure 1-Figure 2 As shown, the utility model provides the following technical solutions: an integrated delayed aeration system, comprising: a treatment pool 1, wherein an anoxic zone 3, an aerobic zone 4 and a sedimentation zone 5 are arranged in the treatment pool 1, a liquid inlet pipe 2 is connected above the anoxic zone 3, a constant flow water outlet hole 16 is arranged between the aerobic zone 4 and the sedimentation zone 5, a liquid outlet pipe 24 is connected above the sedimentation zone 5, a blower 7 is installed above the treatment pool 1, an air outlet end of the blower 7 is connected to an air guide pipe 8, the air guide pipe 8 extends into the aerobic zone 4, an aerator 9 is installed at the air outlet end of the air guide pipe 8, an air inlet end of the blower 7 is connected to an air inlet pipe 10, a filter assembly is installed on the air inlet pipe 10, a constant flow water outlet hole 16 is arranged between the aerobic zone 4 and the sedimentation zone 5, to ensure a constant flow into the sedimentation zone 5, to ensure a sedimentation effect, and to ensure that the outlet SS is less than or equal to 20 mg.

[0020] Furthermore, the filter assembly includes a filter pipe 11, a filter element 12 and a filter hole 13. The filter pipe 11 is installed on the air intake end of the air intake pipe 10. The inner wall of the filter pipe 11 is provided with a threaded groove 14, and the outer wall of the air intake pipe 10 is provided with an external thread 15. The filter element 12 is installed in the filter pipe 11, and the filter hole 13 is opened on the filter pipe 11.

[0021] Through the above technical solution:

[0022] When in use, sewage first enters the anoxic zone 3 from the liquid inlet pipe 2, and stays in the anoxic zone 3 for more than or equal to 6 hours for biological denitrification. The effluent is mixed with the sludge in the sedimentation zone 5 in the anoxic zone 3 for denitrification, and then enters the aerobic zone 4 from the bottom. The blower 7 is started, and the blower 7 introduces gas into the aerobic zone 4 through the air guide pipe 8 and the aerator 9 to ensure the mixing of air, mud and water for biological decarbonization. The total residence time of the anoxic zone 3 plus the aerobic zone 4 is greater than or equal to 24 hours to ensure sufficient biochemical reaction and sludge stabilization. The anoxic zone 3 plus the aerobic zone 4 has a super high reserve of 1 to 2 hours. The water volume adjustment time enhances the system's resistance to impact loads. The constant flow outlet 16 at the end of the aerobic zone 4 and the super-high 1-2h water volume adjustment time of the aerobic zone 4 ensure pulse water inlet and constant flow water outlet, enhancing the system's resistance to impact loads. The outlet water enters the sedimentation zone 5 from the top constant flow outlet 16, where mud and water are separated, and finally the clean water is discharged from the liquid outlet pipe 24. Before the gas enters the blower 7, the filter element 12 and the filter hole 13 in the filter pipe 11 filter the gas, thereby ensuring the cleanliness of the incoming gas and avoiding dust clogging the pipe and affecting the aeration efficiency.

[0023] See also Figure 1 As shown, a sludge pump 17 is installed at the bottom end of the sedimentation zone 5, and a feed pipe 18 is connected to the sludge pump 17. The discharge end of the sludge pump 17 is connected to a guide pipe 19. The discharge end of the guide pipe 19 is connected to a sludge discharge pipe 20 and a sludge return pipe 21 through a tee. The discharge end of the sludge return pipe 21 is located above the anoxic zone 3, and the discharge end of the sludge discharge pipe 20 extends to the outside of the treatment tank 1.

[0024] Furthermore, a residual sludge discharge valve 22 is installed on the sludge discharge pipeline 20 , and a sludge return flow control valve 23 is installed on the sludge return flow pipeline 21 .

[0025] Through the above technical solution:

[0026] When it is necessary to clean the sludge, start the sludge pump 17, which sucks the bottom sludge of the sedimentation zone 5 through the feed pipe 18. Under the control of the sludge return control valve 23, the bottom sludge flows back to the anoxic zone 3 through the feed pipe 19 and the sludge return pipe 21, and the residual sludge discharge valve 22 is opened regularly so that the sludge is discharged regularly from the sludge discharge pipe 20.

[0027] For further information, see Figure 1 As shown, a basket grille 6 is installed on the treatment pool 1, and the basket grille 6 is installed outside the liquid outlet end of the liquid inlet pipe 2.

[0028] Specifically, the gap in the basket grille 6 is less than 5 mm, which can intercept floating objects in the sewage and protect the equipment from being blocked.

[0029] For further information, see Figure 1 and Figure 3 As shown, a water outlet weir 25 is installed above the sedimentation area 5, and the water outlet weir 25 is installed outside the liquid inlet end of the liquid outlet pipe 24.

[0030] Specifically, the water outlet weir 25 can adjust the water flow, control the flow rate of the water flow in the liquid outlet pipe 24, and ensure uniform water outlet from the sedimentation area 5.

[0031] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. An integrated delayed aeration system, characterized in that: include: A treatment pool (1) is provided in the treatment pool (1), wherein an anoxic zone (3), an aerobic zone (4) and a sedimentation zone (5) are provided, wherein a liquid inlet pipe (2) is connected to the top of the anoxic zone (3), a constant flow water outlet hole (16) is provided between the aerobic zone (4) and the sedimentation zone (5), wherein a liquid outlet pipe (24) is connected to the top of the sedimentation zone (5), wherein a blower (7) is installed above the treatment pool (1), wherein an air outlet end of the blower (7) is connected to an air guide pipe (8), wherein the air guide pipe (8) extends into the aerobic zone (4), wherein an aerator (9) is installed at the air outlet end of the air guide pipe (8), wherein an air inlet end of the blower (7) is connected to an air inlet pipe (10), wherein a filter assembly is installed on the air inlet pipe (10).

2. An integrated delayed aeration system according to claim 1, characterized in that: The filter assembly comprises a filter pipe (11), a filter element (12) and a filter hole (13); the filter pipe (11) is installed on the air intake end of the air intake pipe (10); the inner wall of the filter pipe (11) is provided with a thread groove (14); the outer wall of the air intake pipe (10) is provided with an external thread (15); the filter element (12) is installed in the filter pipe (11); and the filter hole (13) is provided on the filter pipe (11).

3. An integrated delayed aeration system according to claim 2, characterized in that: A sludge pump (17) is installed at the bottom end of the sedimentation zone (5), and a feed pipe (18) is connected to the sludge pump (17). The discharge end of the sludge pump (17) is connected to a guide pipe (19), and the discharge end of the guide pipe (19) is connected to a sludge discharge pipe (20) and a sludge return pipe (21) via a tee. The discharge end of the sludge return pipe (21) is located above the anoxic zone (3), and the discharge end of the sludge discharge pipe (20) extends to the outside of the treatment tank (1).

4. An integrated delayed aeration system according to claim 3, characterized in that: The sludge discharge pipeline (20) is provided with a residual sludge discharge valve (22), and the sludge return flow pipeline (21) is provided with a sludge return flow control valve (23).

5. An integrated delayed aeration system according to claim 4, characterized in that: A basket grille (6) is installed on the treatment pool (1), and the basket grille (6) is installed outside the liquid outlet end of the liquid inlet pipe (2).

6. An integrated delayed aeration system according to claim 5, characterized in that: A water outlet weir (25) is installed above the sedimentation zone (5), and the water outlet weir (25) is installed outside the liquid inlet end of the liquid outlet pipe (24).

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