Gas stripping sand suction device

Abstract

The utility model discloses a gas stripping sand suction device, and belongs to the technical field of sewage treatment. The device comprises one or more sewage pools, a filter pool and an air compressor, a sand discharging pipe is arranged in each sewage pool, one end of each sand discharging pipe is arranged in the bottom area of the corresponding sewage pool, the other end of each sand discharging pipe is communicated into the corresponding filter pool, an air outlet of the air compressor is communicated with an air outlet main pipe, and the air outlet main pipe is communicated with an air outlet branch pipe extending into the corresponding sewage pool; a through hole is formed in the outer wall of the sand discharging pipe, and the air outlet branch pipe penetrates through the through hole and extends into the bottom area in the sand discharging pipe. The sand removal device is simple in structure, convenient to operate and high in sand removal efficiency, filter sand at the bottoms of the wastewater pool and the clean water pool of the filter is convenient to clean regularly, abrasion of the impeller caused by sand pumping of a water pump is reduced, influence on operation of subsequent treatment units is avoided, and effluent quality is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of sewage treatment, and particularly relates to an air-lift sand suction device. Background Art

[0002] A denitrifying deep bed filter is a filter that organically combines the functions of denitrification and deep bed filtration. During the operation of the denitrifying deep bed filter, the filter needs to be backwashed to discharge the intercepted and generated solids. The backwashing process usually requires three stages: air washing, air-water combined backwashing, and water washing or rinsing. During the air-water combined backwashing and water washing or rinsing stages, some filter sands will flow into the wastewater tank together with the backwashing water, and due to the loosening of the bottom filter bricks, a large amount of filter sands will accumulate in the clear water tank along with the filter effluent.

[0003] In the prior art, it is necessary to empty the wastewater tank and the clear water tank for manual cleaning, which has the following disadvantages:

[0004] 1. When manually cleaning, when personnel enter the wastewater tank to clean the accumulated filter sands, since it is a limited space operation and the pollutants washed out are likely to generate gases such as hydrogen sulfide and ammonia, there is a risk of poisoning the personnel.

[0005] 2. When using a water pump to suck sand, first, the filter sand colliding with the water pump is likely to cause wear of the water pump impeller. Second, when sucking sand, the filter sand discharged with the suction water pump is likely to block the drain pipe, and the sand suction efficiency is not high.

[0005]

[0006] 3. When cleaning, the denitrifying deep bed filter needs to stop operating, but in the actual operation of the water plant, it is difficult to have the condition of shutting down and emptying for a long time to clean the filter sands.

[0006] Summary of the Invention

[0007] Aiming at the deficiencies of the prior art, the utility model provides an air-lift sand suction device to meet the requirement of cleaning and extracting the accumulated filter sands in the wastewater tank and the clear water tank under the condition of normal operation of the denitrifying deep bed filter, reducing the impact on the normal operation of the denitrifying deep bed filter and the poisoning hazard to the operators during the cleaning process, and solving the problem of low sand suction efficiency.

[0008] To achieve the above object, the utility model designs an air-lift sand suction device, which includes one or more sewage tanks, a filter tank and an air compressor; a sand discharge pipe is arranged in each sewage tank, one end of the sand discharge pipe is arranged in the bottom area of the sewage tank, and the other end is communicated to the filter tank, the air outlet of the air compressor is communicated with a main air outlet pipe, and an air outlet branch pipe extending into the sewage tank is communicated with the main air outlet pipe; through holes are arranged on the outer wall of the sand discharge pipe, and the air outlet branch pipe passes through the through holes and extends into the bottom area inside the sand discharge pipe. After the air compressor blows air, the air flow enters the bottom area inside the sand discharge pipe through the main air outlet pipe and the air outlet branch pipe, so that a density difference is formed between the internal and external mixed liquids of the sand discharge pipe. The sand discharge pipe is inserted into the water, and the water pressure is relatively high. The air flow will enter the sand discharge pipe and be discharged upward. At the same time, the compressed air and the sand-water mixed liquid rise in the sand discharge pipe to form a negative pressure, and a relatively large suction force is formed at the bottom of the sand discharge pipe to drive the inorganic sediment to be discharged through the sand discharge pipe to the filter tank.

[0009] Preferably, the distance between the through hole and the sand inlet of the sand discharge pipe is 30 cm, and the diameter of the through hole is 10 mm.

[0010] Preferably, the sand discharge pipe is composed of a combination of a hard pipe and a flexible pipe connected. The hard pipe is arranged in the sewage tank, and the flexible pipe is communicated to the filter tank.

[0011] Preferably, the diameters of both the hard pipe and the flexible pipe are 60 mm.

[0012] Preferably, the hard pipe is made of PVC material, and the flexible pipe is a corrugated hose made of PE material.

[0013] Preferably, the hard pipe and the flexible pipe are connected by a flange.

[0014] Preferably, there are two sewage tanks. The two sewage tanks are respectively a filter tank clear water tank and a filter tank wastewater tank.

[0015] Preferably, a plurality of cable ties are evenly spaced on the outer wall of the hard pipe, and the cable ties are used to fix the air outlet branch pipe on the outer wall of the hard pipe.

[0016] Preferably, a pressure regulating valve is arranged on the main air outlet pipe.

[0017] Preferably, an air storage tank is arranged on the main air outlet pipe.

[0018] Preferably, the air outlet branch pipe and the sand inlet of the through hole are inclined.

[0019] Preferably, the diameter of the through hole is the same as the diameter of the air outlet branch pipe.

[0020] The beneficial effects of the utility model:

[0021] 1. The structure of the utility model is simple, easy to operate, and has a relatively high sand removal efficiency. It is convenient to regularly clean the filter sand at the bottom of the filter wastewater tank and the filter clear water tank, reducing the wear of the impeller caused by the sand pumping of the water pump, avoiding affecting the operation of the subsequent treatment unit, and improving the effluent quality.

[0022] 2. The utility model does not require manual force. Only need to manually turn on the air compressor and adjust the air volume through the regulating valve to control the sand discharge amount, saving human resources and labor costs, and avoiding the danger of poisoning and asphyxiation when manually cleaning the filter sand in the filter wastewater tank.

[0023] 3. The utility model can be used under the normal operation state of the denitrification filter, without stopping production and emptying to clean the filter sand, avoiding a series of economic losses caused by the long-term shutdown of the sewage treatment plant. Description of the Drawings

[0024] Figure 1 is the process flow chart of the utility model;

[0025] Reference Signs:

[0026] 1 sewage tank, 2 filter, 3 air compressor, 4 main air outlet pipe, 41 air outlet branch pipe, 42 pressure regulating valve, 5 sand discharge pipe, 51 through hole, 52 hard pipe, 53 flexible pipe, 6 tie strap, 7 gas storage tank. Detailed Embodiment

[0027] In order to make the technical problems, technical solutions and beneficial effects to be solved by this application clearer, the following further details this application in conjunction with the drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain this application and are not used to limit this application.

[0028] It should be noted that when an element is referred to as being "fixed to" or "disposed on" another element, it can be directly on the other element or indirectly on the other element. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or indirectly connected to the other element.

[0029] It should be understood that the orientation or positional relationship indicated by the terms "length", "width", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing this application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation to this application.

[0030] In addition, the terms "first" and "second" are for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, features defined with "first" and "second" may explicitly or implicitly include one or more of such features. In the description of this application, "a plurality of" means two or more unless otherwise specifically defined.

[0031] Reference to "an embodiment" or "some embodiments" etc. described in the specification of this application means that a specific feature, structure, or characteristic described in connection with that embodiment is included in one or more embodiments of this application. Thus, statements such as "in an embodiment", "in some embodiments", "in other some embodiments", "in still other embodiments", etc. that appear in different places in this specification do not necessarily all refer to the same embodiment, but mean "one or more but not all embodiments", unless otherwise specifically emphasized in another way. The terms "comprising", "including", "having" and their variants all mean "including but not limited to", unless otherwise specifically emphasized in another way.

[0032] The present utility model will be further described below in conjunction with the accompanying drawings and specific embodiments.

[0033] Embodiment

[0034] As Figure 1 shown in the air-lift sand suction device, this device is used to extract the sand particles at the bottom of the sewage tank 1 and discharge them into the filter tank 2. In this embodiment, the sewage tank 1 is a filter tank clear water tank and a filter tank waste water tank, including an air compressor 3. The air outlet of the air compressor 3 is connected to an air outlet main pipe 4. A pressure regulating valve 42 and a gas storage tank 7 are successively arranged on the air outlet main pipe 4 along the air flow direction. Two air outlet branch pipes 41 extending into the sewage tank 1 are connected to the air outlet main pipe 4; there are two sewage tanks 1 and a sand discharge pipe 5 is provided in each sewage tank 1. The sand inlet of the sand discharge pipe 5 is inclined. One end of the sand discharge pipe 5 is arranged in the bottom area of the sewage tank 1, and the other end is connected to the filter tank 2. Through holes 51 are provided on the outer wall of the sand discharge pipe 5, and the air outlet branch pipes 41 pass through the through holes 51 and extend into the bottom area inside the sand discharge pipe 5. The diameter of the through hole 51 is the same as that of the air outlet branch pipe 41, both being 10 mm. PVC sealant is applied between the air outlet branch pipe 41 and the through hole 51. Each sand discharge pipe 5 is provided with a corresponding air outlet branch pipe 41 inside.

[0035] The sand discharge pipe 5 is composed of a hard pipe 52 and a flexible pipe 53 connected by a flange. The hard pipe 52 is made of PVC material, and the flexible pipe is a corrugated hose made of PE material. The diameters of the hard pipe 52 and the flexible pipe 53 are both 60 mm. The hard pipe 52 is arranged in the sewage tank 1, and the flexible pipe 53 is connected to the filter tank 2. A plurality of cable ties 6 are evenly spaced on the outer wall of the hard pipe 52, and the cable ties 6 are used to fix the air outlet branch pipe 41 on the outer wall of the hard pipe 52.

[0036] The following is an introduction to the process flow when the utility model works:

[0037] Workers fix the hard pipe 52 of the sand discharge pipe 5 in the sand collection area of the sewage tank 1, turn on the air compressor, and the air flow passes through the main air outlet pipe 4 and the air outlet branch pipe 41 in sequence and enters the bottom area inside the sand discharge pipe 5, so that a density difference is formed between the internal and external mixed liquids of the sand discharge pipe 5. The sand discharge pipe 5 is inserted into the water, and the water pressure is relatively high. The air flow will enter the sand discharge pipe 5 and be discharged upward. At the same time, the compressed air and the sand-water mixed liquid rise in the sand discharge pipe 5 to form a negative pressure, and a relatively large suction force is formed at the bottom of the sand discharge pipe 5 to drive the inorganic sediment to be discharged through the sand discharge pipe 5 to the existing filter tank 2 in the sewage treatment plant.

[0038] The above-described embodiments are only used to illustrate the technical solutions of the present application, rather than to limit them; although the present application has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that: they can still modify the technical solutions described in the foregoing embodiments, or perform equivalent replacements on some of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the various embodiments of the present application, and should all be included in the protection scope of the present application.

Claims

1. An air lift sand suction device, characterized in that: It comprises one or more sewage pools (1), a filter tank (2) and an air compressor (3); each sewage pool (1) is provided with a sand discharge pipe (5), one end of the sand discharge pipe (5) is arranged at the bottom area of ​​the sewage pool (1), and the other end is connected to the filter tank (2); the air outlet of the air compressor (3) is connected to an air outlet main pipe (4), and the air outlet main pipe (4) is connected to an air outlet branch pipe (41) extending into the sewage pool (1); a through hole (51) is provided on the outer wall of the sand discharge pipe (5), and the air outlet branch pipe (41) passes through the through hole (51) and extends into the bottom area of ​​the sand discharge pipe (5).

2. The air lift sand suction device according to claim 1, characterized in that: The sand discharge pipe (5) is composed of a hard pipe (52) and a soft pipe (53) connected in combination. The hard pipe (52) is arranged in the sewage pool (1), and the soft pipe (53) is connected to the filter pool (2).

3. The air lift sand suction device according to claim 2, characterized in that: The hard pipe (52) and the soft pipe (53) are connected via a flange.

4. The air lift sand suction device according to claim 2, characterized in that: A plurality of tie ties (6) are evenly spaced apart on the outer wall of the rigid tube (52), and the tie ties (6) are used to fix the air outlet branch pipe (41) to the outer wall of the rigid tube (52).

5. The air lift sand suction device according to claim 1, characterized in that: There are two sewage pools (1).

6. The air lift sand suction device according to claim 1, characterized in that: The air outlet main pipe (4) is provided with a pressure regulating valve (42).

7. The air lift sand suction device according to claim 1, characterized in that: The air outlet main pipe (4) is provided with an air storage tank (7).

8. The air lift sand suction device according to claim 1, characterized in that: PVC sealant is applied between the air outlet branch pipe (41) and the through hole (51).

9. The air lift sand suction device according to claim 1, characterized in that: The sand inlet of the sand discharge pipe (5) is designed to be inclined.

10. The air lift sand suction device according to claim 1, characterized in that: The diameter of the through hole (51) is the same as the diameter of the air outlet branch pipe (41).

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