Ammonia nitrogen wastewater treatment device

Abstract

An ammonia nitrogen wastewater treatment device, including: wastewater collection unit, wastewater collection unit including ammonia nitrogen wastewater storage tank, PH adjusting unit, PH adjusting unit including PH adjusting pool and intermediate pool, heating unit, heating unit including heating device, deamination unit, deamination unit including first supergravity reactor, absorption unit, absorption unit including second supergravity reactor, the utility model discloses utilize the centrifugal force of first supergravity reactor to improve gas-liquid separation efficiency, make ammonia gas better overflow, ensure water quality, utilize second supergravity reactor to increase gas-liquid contact area, improve the efficiency that ammonia gas is absorbed by H2SO4, not only save reagent, also improve the concentration of ammonium sulfate waste liquid, reduce waste liquid production, for various concentration ammonia nitrogen wastewater all have better processing effect.

Description

Technical Field

[0001] This utility model relates to the field of chemistry, and more particularly to wastewater treatment technology, specifically an ammonia nitrogen wastewater treatment device. Background Technology

[0002] In existing technologies, stripping is commonly used to treat ammonia nitrogen wastewater. The process is as follows: First, the wastewater enters a pH adjustment tank to adjust the pH to alkaline, converting ammonium ions into free ammonia. Then, it is pumped into the upper part of the stripping tower and evenly sprayed onto the surface of the packing layer by a water distributor. Simultaneously, a blower introduces air from the bottom of the tower, and the air comes into full contact with the descending wastewater in the packing layer, stripping the free ammonia into the gas phase. Finally, the ammonia-containing air enters an absorption tower, where it is absorbed by a solution such as sulfuric acid to generate ammonium sulfate. The treated wastewater is then discharged from the bottom of the tower. This method can effectively treat high-concentration ammonia nitrogen wastewater, but the stripping and absorption towers require a large footprint, consume a significant amount of reagents, produce low-concentration ammonium sulfate waste liquid, and incur high costs for outsourced waste liquid treatment. Summary of the Invention

[0003] The purpose of this utility model is to provide an ammonia nitrogen wastewater treatment device, which solves the technical problems of large footprint and high reagent consumption in the existing stripping treatment device.

[0004] This utility model relates to an ammonia nitrogen wastewater treatment device, comprising:

[0005] Wastewater collection unit, the wastewater collection unit includes an ammonia nitrogen wastewater storage tank; pH adjustment unit, the pH adjustment unit includes a pH adjustment tank and an intermediate water tank, the outlet of the ammonia nitrogen wastewater storage tank is connected to the inlet of the pH adjustment tank through a raw water delivery pipe, a first delivery pump is installed in the raw water delivery pipe, and the intermediate water tank is connected to the pH adjustment tank.

[0006] A heating unit, comprising a heating device, wherein the outlet of the intermediate water tank is connected to the material inlet of the heating device via a cold source inlet pipe, and a second conveying pump is provided in the cold source inlet pipe;

[0007] The ammonia removal unit includes a first hypergravity reactor. The material outlet of the heating device is connected to the liquid inlet of the first hypergravity device through a cold source outlet pipe. The liquid outlet of the first hypergravity reactor is connected to the inlet of the effluent pool through an effluent pipe.

[0008] The absorption unit includes a second hypergravity reactor. The gas phase outlet of the first hypergravity reactor is connected to the gas phase inlet of the second hypergravity reactor via an inlet pipe. The gas phase outlet of the second hypergravity reactor is connected to the gas phase inlet of the first hypergravity reactor via an outlet pipe. The liquid phase outlet of the second hypergravity reactor is connected to an ammonium sulfate storage tank via a liquid outlet pipe.

[0009] Furthermore, the intermediate water tank is located on one side of the pH adjustment tank, and an opening is provided between the pH adjustment tank and the intermediate water tank.

[0010] Furthermore, the heating device is a heat exchanger, which is provided with a heat source inlet pipe and a heat source outlet pipe.

[0011] Compared with existing technologies, the advantages of this invention are positive and significant. This invention utilizes the centrifugal force of the first hypergravity reactor to improve gas-liquid separation efficiency, allowing ammonia to escape more effectively and ensuring the quality of the produced water. The centrifugal force of the second hypergravity reactor increases the gas-liquid contact area, improving the efficiency of ammonia absorption by H2SO4, saving reagents, increasing the concentration of ammonium sulfate wastewater, and reducing wastewater generation. Replacing the stripping tower and absorption tower with two sets of hypergravity reactors saves land area and provides good treatment results for ammonia nitrogen wastewater of various concentrations. Attached Figure Description

[0012] Figure 1 This is a flowchart of the ammonia nitrogen wastewater treatment device of this utility model.

[0013] Figure 2 This is a schematic diagram of the ammonia nitrogen wastewater treatment device of this utility model.

[0014] The diagram shows the following markings: 10. Ammonia nitrogen wastewater storage tank; 11. Raw water delivery pipe; 12. First delivery pump; 20. pH adjustment tank; 30. Intermediate water tank; 31. Second delivery pump; 40. Heat exchanger; 41. Cold source inlet pipe; 42. Cold source outlet pipe; 43. Heat source inlet pipe; 44. Heat source outlet pipe; 50. First hypergravity reactor; 51. Air inlet pipe; 52. Air outlet pipe; 53. Water outlet pipe; 60. Water outlet tank; 70. Second hypergravity reactor; 71. Liquid outlet pipe; 80. Ammonium sulfate storage tank. Detailed Implementation

[0015] The present invention will be further described below with reference to the accompanying drawings and embodiments, but this does not limit the present invention.

[0016] like Figures 1-2 As shown, the present invention provides an ammonia nitrogen wastewater treatment device, comprising:

[0017] Wastewater collection unit, the wastewater collection unit including ammonia nitrogen wastewater storage tank 10;

[0018] The pH adjustment unit includes a pH adjustment tank 20 and an intermediate water tank 30. The outlet of the ammonia nitrogen wastewater storage tank 10 is connected to the inlet of the pH adjustment tank 20 through a raw water delivery pipe 11. A first delivery pump 12 is installed in the raw water delivery pipe 11. The intermediate water tank 30 is connected to the pH adjustment tank 20.

[0019] The heating unit includes a heating device. The outlet of the intermediate water tank 30 is connected to the material inlet of the heating device through a cold source inlet pipe 41. A second conveying pump 31 is installed in the cold source inlet pipe 41.

[0020] The ammonia removal unit includes a first hypergravity reactor 50. The material outlet of the heating device is connected to the liquid inlet of the first hypergravity device through a cold source outlet pipe 42. The liquid outlet of the first hypergravity reactor 50 is connected to the inlet of the effluent pool 60 through an effluent pipe 53.

[0021] The absorption unit includes a second hypergravity reactor 70. The gas phase outlet of the first hypergravity reactor 50 is connected to the gas phase inlet of the second hypergravity reactor 70 through an inlet pipe 51. The gas phase outlet of the second hypergravity reactor 70 is connected to the gas phase inlet of the first hypergravity reactor 50 through an outlet pipe 52. The liquid phase outlet of the second hypergravity reactor 70 is connected to an ammonium sulfate storage tank 80 through a liquid outlet pipe 71.

[0022] Furthermore, the intermediate water tank 30 is located on one side of the pH adjustment tank 20, and an opening is provided between the pH adjustment tank 20 and the intermediate water tank 30.

[0023] Furthermore, the heating device is a heat exchanger 40, which is provided with a heat source inlet pipe 43 and a heat source outlet pipe 44.

[0024] In use, the first pump 12 pumps the ammonia nitrogen wastewater stored in the ammonia nitrogen wastewater storage tank 10 into the pH adjustment tank 20 through the raw water delivery pipe 11. After the pH of the ammonia nitrogen wastewater is adjusted to 10-12 in the pH adjustment tank 20, it enters the intermediate water tank 30. The pH adjustment tank 20 and the intermediate water tank 30 are connected by an opening. Wastewater overflows from the pH adjustment tank 20 into the intermediate water tank 30 through the opening. The second pump 31 pumps the ammonia nitrogen wastewater temporarily stored in the intermediate water tank 30 into the heat exchanger 40 through the cold source inlet pipe 41. After being preheated by the heat exchanger 40, the ammonia nitrogen wastewater enters the first hypergravity reactor 50 through the cold source outlet pipe 42. The heat exchanger 40 is equipped with a heat source inlet pipe 43 and a heat source outlet pipe 44. The heat source can be hot water, steam, etc. The heat source enters the heat exchanger 40 through the heat source inlet pipe 43, heats the ammonia nitrogen wastewater, and then discharges it through the heat source outlet pipe 44.

[0025] After the preheated alkaline ammonia nitrogen wastewater enters the first supergravity reactor 50, it diffuses within the reactor due to centrifugal force. During this diffusion process, gas-liquid separation is achieved. Due to the centrifugal effect of the supergravity reactor, the gas-liquid separation efficiency of the ammonia nitrogen wastewater is improved, allowing ammonia gas to escape more effectively and ensuring the quality of the produced water. The remaining wastewater after ammonia gas separation is discharged to the effluent tank 60 through the effluent pipe 53. The wastewater in the effluent tank 60 is then either directly discharged or connected to the next stage of the treatment system depending on its specific water quality.

[0026] Ammonia gas separated from the first hypergravity reactor 50 enters the second hypergravity reactor 70 through the inlet pipe 51. H2SO4 reagent is added to the liquid inlet of the second hypergravity reactor 70. Under the centrifugal force of the second hypergravity reactor 70, the H2SO4 reagent rapidly diffuses outwards, fully contacting and absorbing the ammonia gas flowing in the opposite direction during diffusion. After absorbing the ammonia, the H2SO4 reagent forms ammonium sulfate waste liquid with a concentration greater than 30%. This high-concentration ammonium sulfate waste liquid is discharged to the ammonium sulfate storage tank 80 through the outlet pipe 71. The ammonium sulfate waste liquid stored in the ammonium sulfate storage tank 80 can be centrally treated. The residual ammonia gas after absorption by the second hypergravity reactor 70 flows back to the first hypergravity reactor 50 through the outlet pipe 52, ensuring 100% absorption of the ammonia gas.

Claims

1. An ammonia nitrogen wastewater treatment device, characterized in that, include: Wastewater collection unit, the wastewater collection unit including ammonia nitrogen wastewater storage tank (10). The pH adjustment unit includes a pH adjustment tank (20) and an intermediate water tank (30). The outlet of the ammonia nitrogen wastewater storage tank (10) is connected to the inlet of the pH adjustment tank (20) through a raw water delivery pipe (11). A first delivery pump (12) is installed in the raw water delivery pipe (11). The intermediate water tank (30) is connected to the pH adjustment tank (20). The heating unit includes a heating device. The outlet of the intermediate water tank (30) is connected to the material inlet of the heating device through a cold source inlet pipe (41). A second conveying pump (31) is provided in the cold source inlet pipe (41). The ammonia removal unit includes a first supergravity reactor (50). The material outlet of the heating device is connected to the liquid inlet of the first supergravity device through a cold source outlet pipe (42). The liquid outlet of the first supergravity reactor (50) is connected to the inlet of the water tank (60) through a water outlet pipe (53). The absorption unit includes a second hypergravity reactor (70), the gas phase outlet of the first hypergravity reactor (50) is connected to the gas phase inlet of the second hypergravity reactor (70) through an inlet pipe (51), the gas phase outlet of the second hypergravity reactor (70) is connected to the gas phase inlet of the first hypergravity reactor (50) through an outlet pipe (52), and the liquid phase outlet of the second hypergravity reactor (70) is connected to an ammonium sulfate storage tank (80) through a liquid outlet pipe (71).

2. The ammonia nitrogen wastewater treatment device as described in claim 1, characterized in that: The intermediate water tank (30) is located on one side of the pH adjustment tank (20), and an opening is provided between the pH adjustment tank (20) and the intermediate water tank (30).

3. The ammonia nitrogen wastewater treatment device as described in claim 1, characterized in that: The heating device is a heat exchanger (40), which is provided with a heat source inlet pipe (43) and a heat source outlet pipe (44).

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