Powder feeding and crushing device for sewage treatment tank

Abstract

The utility model discloses a powder feeding and crushing device for a sewage treatment tank, which is characterized in that a crushing net is fixedly mounted in a feeding tank and divides an inner cavity of the feeding tank into an upper space and a lower space, a feeding pipe is communicated with the lower space, and a discharging pipe is communicated with the upper space. The lower end of the feeding tank is connected with a pressurizing pipe. The gas-water tank is respectively connected with a gas inlet pipe with a gas path one-way valve, a water inlet pipe with a water path one-way valve and a gas-water pipe. The other end of the air-water pipe is connected with the pressurizing pipe. By means of the forced stirring function of the high-pressure water-gas mixed flow and the puncturing mechanical function of the crushing cone, the powder crushing and dissolving device can further promote powder crushing and dissolving, and it is better guaranteed that materials are evenly and rapidly diffused after being added into a water pool.

Description

Technical Field

[0001] The utility model relates to a powder material adding device for a sewage treatment pool, in particular to a powder material adding device for a sewage treatment pool with a crushing and dissolution-aiding function. Background Art

[0002] A wide variety of chemical materials are added to sewage treatment tanks in powder form. Examples include ferrous sulfate, a coagulant used to remove phosphorus and heavy metals; polyaluminum chloride, a flocculant used to remove suspended solids; and diatomaceous earth powder, a filter aid used to absorb organic matter and heavy metal ions from wastewater.

[0003] These powders usually need to be mechanically stirred and dissolved in water before being added to the water tank to ensure uniform and rapid diffusion after being added to the water tank. For example, the Chinese patent application with publication number CN110204147A discloses a "treatment system for on-site decentralized sewage treatment of phosphorus-containing wastewater", the top of which is provided with a uniform feeding device, the uniform feeding device includes a feeding machine, a vibrating screen, and a multi-nozzle pipe. The vibrating screen is arranged on the top of the sedimentation tank, the feeding machine feeds the dephosphorization agent onto the vibrating screen, and the multi-nozzle pipe is placed above the vibrating screen to spray the liquid in the aerobic tank onto the vibrating screen. The vibrating screen includes a screen hinged on the inner wall of the sedimentation tank and arranged obliquely, a screen box arranged at one end of the screen, and a vibrator arranged on the screen box. The screen is provided with a number of parallel dosing troughs, the bottom of which is evenly provided with sieve holes, and the aperture of the sieve holes increases from the screen box downwards. Although this feeding device can basically meet the requirements of uniform feeding, it needs to be equipped with a motor, a vibrator and a screen with a complex structure, and it does not have a crushing function, making it difficult to quickly crush and dissolve solid materials.

[0004] For example, Chinese patent application publication number CN118289915A discloses a "method and device for carbonizing organic landfill leachate wastewater." To treat organic landfill leachate wastewater with a high organic matter content, sodium tetraphenylborate is added to cause a precipitation reaction between sodium tetraphenylborate and ammonium ions, thereby reducing the amount of ammonia nitrogen in the wastewater. The feeding device is located above the reaction tank and is equipped with multiple discharge holes for uniformly adding an aqueous solution of sodium tetraphenylborate to the leachate wastewater as an ammonia nitrogen remover. The stirring device is used to thoroughly stir and mix the ammonia nitrogen remover and leachate wastewater in the reaction tank. The feeding device uniformly adds the sodium tetraphenylborate solution to the aqueous solution from above through multiple channels to prevent excessive local precipitation. After the reagent is added, the stirring force needs to be strictly controlled. Excessive force will cause some flocs to float to the upper layer of the solution and be difficult to settle. Not only is the stirring force difficult to control, but the high-viscosity material formed is difficult to break up and needs to be discharged through a mud outlet into a dehydration device for further treatment, increasing the processing steps. In addition, the high viscosity of the material formed is also easy to stick to the stirrer. Utility Model Content

[0005] The technical problem to be solved by the utility model is to provide a powder adding and crushing device for a sewage treatment pool, which, by means of pneumatic stirring and crushing effect, further promotes the crushing and dissolution of the powder to ensure more uniform and rapid diffusion after being added to the pool.

[0006] The technical solution of the utility model is as follows:

[0007] The powder adding and crushing device of the sewage treatment pool includes a feeding tank, which is respectively connected to a feeding pipe with a valve and a discharging pipe with a valve. A crushing net is fixedly installed in the feeding tank, which divides the inner cavity of the feeding tank into two upper and lower spaces. The feeding pipe is connected to the lower space, and the discharging pipe is connected to the upper space; the lower end of the feeding tank is connected to a boosting pipe; the powder adding and crushing device also includes an air-water tank, which is respectively connected to an air inlet pipe with an air circuit one-way valve, a water inlet pipe with a water circuit one-way valve, and an air-water pipe; the other end of the air-water pipe is connected to the boosting pipe through a second control valve.

[0008] Preferably, the crushing net is in the shape of a cone with the upper end facing upwards; a plurality of crushing cones with the cone tips facing downwards and a plurality of mesh holes are provided on the net surface; the crushing cones and the mesh holes are arranged at intervals.

[0009] Preferably, the powder feeding and crushing device also includes a recoil pipe with a fourth control valve, one end of which is connected to the upper space in the feeding tank, and the other end is connected to the air-water pipe; the lower end of the feeding tank is also connected to a discharge pipe with a third control valve.

[0010] Preferably, the air inlet pipe is connected to the aeration air supply pipeline of the sewage treatment system.

[0011] Preferably, the water inlet pipe is connected to a water tank of a sewage treatment system via a booster water pump.

[0012] Preferably, a safety valve is installed at the upper end of the feeding tank.

[0013] Compared with the prior art, the present invention has the following beneficial effects:

[0014] First, when the present invention is in operation, the high-pressure water-air mixture from the air-water tank enters the space below the crushing mesh in the feed tank, carrying powdered material to impact the crushing mesh. Under the action of the thorn-shaped crushing cone, solid materials, including flocculent materials, are crushed by the crushing cone and then flow through the mesh to enter the space above the crushing mesh with the water-air mixture, ultimately being fed into the sewage treatment tank. Leveraging the forced stirring of the high-pressure water-air mixture and the mechanical puncture of the crushing cone, the present invention further promotes the crushing and dissolution of powdered materials, ensuring even and rapid dispersion of the materials after addition to the tank.

[0015] Second, the utility model has a simple structure and low operating cost, and effectively avoids the problem in the prior art that sticky substances easily adhere to the stirring device, making it difficult to clean or affecting the feeding efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a structural schematic diagram of an embodiment of the present utility model.

[0017] Figure 2 It is a schematic diagram of the axial projection of the crushing net in the embodiment of the present utility model.

[0018] Figure 3 It is a schematic diagram of a longitudinal partial cross-section structure of a crushing net in an embodiment of the present utility model.

[0019] Description of reference numerals:

[0020] 1. Feeding tank; 2. Crushing net; 2-1. Mesh; 2-2. Crushing cone; 3. Ball valve; 4. Discharge pipe; 5. Inlet pipe; 6. Safety valve; 7. Booster pipe; 8. Air-water pipe; 9. Air-water tank; 10. Air circuit check valve; 11. Water circuit check valve; 12. Air inlet pipe; 13. Water inlet pipe; 14. Booster water pump; 15. Backflush pipe; F1. First control valve; F2. Second control valve; F3. Third control valve; F4. Fourth control valve. DETAILED DESCRIPTION

[0021] The present invention will be further described below with reference to the embodiments and the accompanying drawings.

[0022] like Figure 1 The present embodiment of the powder feed and crushing device for a sewage treatment tank includes a feed tank 1 connected to an inlet pipe 5 equipped with a ball valve 3 and an outlet pipe 4 equipped with a first control valve F1. A safety valve 6 is installed at the top of the feed tank 1. When the pressure inside the feed tank 1 exceeds a set limit (i.e., the pressure that the feed tank 1 can withstand), the safety valve 6 opens to release pressure and sound an alarm.

[0023] A crushing net 2 is fixedly installed in the feeding tank 1, and the crushing net 2 divides the inner cavity of the feeding tank 1 into two upper and lower spaces. The feeding pipe 5 is connected to the lower space, and the discharging pipe 4 is connected to the upper space.

[0024] Combine Figure 1 、 Figure 2 and Figure 3 The crushing net 2 is generally conical in shape with the upper end facing upward. The net surface is provided with a plurality of downward-pointing thorn-shaped crushing cones 2-2 and a plurality of meshes 2-1. The crushing cones 2-2 and meshes 2-1 are arranged at intervals. The crushing net 2 is generally made of stainless steel and is manufactured by mold casting.

[0025] The lower end of the feeding tank 1 is connected to a pressurizing pipe 7. The lower end of the feeding tank 1 is also connected to a discharge pipe with a third control valve F3.

[0026] This embodiment also includes an air-water tank 9 for mixing air and water. This tank 9 is connected to an air inlet pipe 12 with an air check valve 10. Preferably, this inlet pipe 12 is connected to the aeration supply line of the sewage treatment system. Alternatively, this inlet pipe 12 can be connected to a separate air pump. This tank 9 is also connected to a water inlet pipe 13 with a water check valve 11. This water inlet pipe 13 is connected to the sewage treatment system's powder feed tank via a booster water pump 14. This tank 9 is also connected to an air-water pipe 8, the other end of which is connected to the booster pipe 7 via a second control valve F2.

[0027] Furthermore, this embodiment further comprises a backwash pipe 15 with a fourth control valve F4 , one end of which is connected to the upper space in the feeding tank 1 , and the other end of which is connected to the air-water pipe 8 .

[0028] When the utility model is working, first, powdered materials for sewage treatment are added to the feeding tank 1 through the feeding pipe 5, then the ball valve 3, the third control valve F3 and the fourth control valve F4 are closed, and the booster water pump 14, the water channel one-way valve 11, the gas channel one-way valve 10, the second control valve F2 and the first control valve F1 are turned on, and the high-pressure water-gas mixed flow formed in the gas-water tank 9 enters the space below the crushing net 2 in the feeding tank 1 through the gas-water pipe 8 and the booster pipe 7 in turn, carrying the powdered materials to impact the crushing net 2, and under the action of the thorn-shaped crushing cone 2-2, the solid materials including the flocculent materials are crushed by the crushing cone 2-2, and enter the space above the crushing net 2 through the mesh 2-1 with the water-gas mixed flow, and finally are fed into the sewage treatment pool through the discharge pipe 4.

[0029] If the mesh 2-1 is clogged, causing the flow rate of the water-gas mixed flow to slow down significantly, close the first control valve F1 and the second control valve F2, and open the third control valve F3 and the fourth control valve F4, and the water-gas mixed flow will flush the mesh 2-1 of the crushing net 2 from top to bottom, and the flushing material will be added to the sewage treatment pool through the discharge pipe.

Claims

1. A powder feeding and crushing device for a sewage treatment pool, comprising a feeding tank (1), wherein the feeding tank (1) is respectively connected to an inlet pipe (5) with a valve and an outlet pipe (4) with a valve, and wherein: A crushing net (2) is fixedly installed in the feeding tank (1), and the crushing net (2) divides the inner cavity of the feeding tank (1) into two spaces, an upper space and an lower space, wherein the feeding pipe (5) is connected to the lower space, and the discharging pipe (4) is connected to the upper space; the lower end of the feeding tank (1) is connected to a boosting pipe (7); the powder feeding and crushing device further comprises an air-water tank (9), which is respectively connected to an air inlet pipe (12) with an air path one-way valve (10), a water inlet pipe (13) with a water path one-way valve (11), and an air-water pipe (8); the other end of the air-water pipe (8) is connected to the boosting pipe (7) via a second control valve (F2).

2. The powder adding and crushing device for sewage treatment pool according to claim 1, characterized in that: The crushing net (2) is in the shape of a cone with the upper end facing upwards; a plurality of crushing cones (2-2) with their cone tips facing downwards and a plurality of mesh holes (2-1) are arranged on the net surface; the crushing cones (2-2) and the mesh holes (2-1) are arranged at intervals.

3. The powder adding and crushing device for sewage treatment pool according to claim 1 or 2, characterized in that: The powder feeding and crushing device further comprises a recoil pipe (15) with a fourth control valve (F4), one end of the recoil pipe (15) being connected to the upper space in the feeding tank (1), and the other end being connected to the air-water pipe (8); the lower end of the feeding tank (1) is also connected to a discharge pipe with a third control valve (F3).

4. The powder adding and crushing device for sewage treatment pool according to claim 1 or 2, characterized in that: The air inlet pipe (12) is connected to the aeration air supply pipeline of the sewage treatment system.

5. The powder adding and crushing device for sewage treatment pool according to claim 1 or 2, characterized in that: The water inlet pipe (13) is connected to the water tank of the sewage treatment system via a booster water pump (14).

6. The powder adding and crushing device for sewage treatment pool according to claim 1 or 2, characterized in that: A safety valve (6) is installed at the upper end of the feeding tank (1).

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