A degassing tower for treating ammonia nitrogen-containing industrial wastewater

Abstract

This utility model relates to a degassing tower for treating industrial wastewater containing ammonia nitrogen. It solves the problem in existing ammonia nitrogen wastewater treatment equipment that is difficult to divert and treat wastewater according to its ammonia and nitrogen content, resulting in poor operational flexibility. It includes a storage tank with a stirring structure extending inwards from the bottom. An alkaline solution inlet pipe is connected to the top of the storage tank, and an ammonia degassing assembly is also connected to the top. A wastewater diversion structure is connected to the storage tank, with one end connected to the ammonia degassing assembly and the other end connected to the storage tank. The bottom of the storage tank is connected to the ammonia degassing assembly via a flow guiding structure. The advantages of this utility model are: it can treat wastewater according to its specific conditions, offering excellent operational flexibility and effectively improving the treatment efficiency of ammonia nitrogen wastewater.

Description

Technical Field

[0001] This utility model relates to the field of wastewater treatment technology, specifically to a degassing tower for treating industrial wastewater containing ammonia nitrogen. Background Technology

[0002] With the development of industrial and agricultural production, the discharge of ammonia nitrogen wastewater has increased dramatically, becoming a significant factor in environmental pollution. Its sources are relatively widespread: such as the decomposition of nitrogen-containing organic matter; industrial wastewater from ammonia synthesis, coking, petrochemicals, pharmaceuticals, and food processing; and the use of chemical fertilizers, all of which generate large amounts of high-concentration ammonia nitrogen wastewater. Currently, methods for treating ammonia nitrogen wastewater mainly include ammonia stripping, chemical precipitation, ion exchange, breakpoint chlorination, and biological deammoniation. However, these methods all suffer from drawbacks such as secondary pollution, relatively low removal rates, and the inability to recover resources. Furthermore, existing ammonia nitrogen wastewater treatment equipment struggles to differentiate treatment based on the ammonia and nitrogen content of the wastewater, resulting in poor flexibility and reduced treatment efficiency.

[0003] To address the shortcomings of existing technologies, people have conducted long-term explorations and proposed various solutions. For example, Chinese patent literature discloses an ammonia nitrogen wastewater treatment device [CN201410132502.X], which includes an ammonia nitrogen wastewater tank, a wastewater lift pump, a flow meter, a dosing device, a high-efficiency coagulation sedimentation tank, an alkali adjustment tank, an alkali dosing pump, a first-stage wastewater circulation tank, a first-stage circulation pump, a first-stage primary filter, a first-stage secondary filter, a first-stage vacuum degassing membrane device, a second-stage wastewater circulation tank, a second-stage circulation pump, a second-stage filter, a second level gauge, a second-stage direct contact degassing membrane device, a waste acid circulation tank, an acid circulation pump, and an acid filter.

[0004] The above solution has solved to some extent the problems of low removal rate, easy secondary pollution and inability to recycle resources in the existing ammonia nitrogen treatment methods. However, the solution still has many shortcomings, such as difficulty in diverting treatment according to the ammonia and nitrogen content in the wastewater, poor flexibility in use, and delay in treatment efficiency. Summary of the Invention

[0005] The purpose of this invention is to address the above-mentioned problems by providing a flexible degassing tower for treating ammonia-containing industrial wastewater.

[0006] To achieve the above objectives, the present invention adopts the following technical solution: a degassing tower for treating industrial wastewater containing ammonia nitrogen, comprising a storage tank, a stirring structure extending toward the interior of the storage tank at the bottom, an alkaline inlet pipe connected to the upper end of the storage tank, an ammonia degassing component connected to the upper end of the storage tank, a wastewater diversion structure connected to the storage tank, one end of the wastewater diversion structure connected to the ammonia degassing component and the other end connected to the storage tank, and the bottom of the storage tank connected to the ammonia degassing component through a flow guiding structure.

[0007] In the above-mentioned degassing tower for treating ammonia nitrogen-containing industrial wastewater, the wastewater diversion structure includes a wastewater inlet pipe, a three-way valve installed on the wastewater inlet pipe, the three-way valve being connected to a storage tank through a first guide branch pipe, and the three-way valve being connected to an ammonia degassing component through a second guide branch pipe.

[0008] In the aforementioned degassing tower for treating ammonia-nitrogen-containing industrial wastewater, an inlet flow valve is installed on the first guide branch pipe, a high-pressure water pump is installed on the second guide branch pipe, and an inlet pH sensor is installed on the wastewater inlet pipe.

[0009] In the above-mentioned degassing tower for treating ammonia nitrogen-containing industrial wastewater, an alkaline solution flow valve is provided on the alkaline solution inlet pipe, and a diversion channel connected to the alkaline solution inlet pipe is provided on the side wall of the storage tank. The bottom of the storage tank is provided with a horizontally arranged outlet channel connected to the diversion channel, and several outlet holes are provided on the outlet channel.

[0010] In the above-mentioned degassing tower for treating ammonia nitrogen-containing industrial wastewater, the flow guiding structure includes a flow guiding pipe, which is equipped with a flow guiding valve. One end of the flow guiding pipe is connected to a storage tank via a water pump, and the other end is connected to an ammonia degassing component via a high-pressure water pump.

[0011] In the above-mentioned degassing tower for treating ammonia nitrogen-containing industrial wastewater, the ammonia degassing component includes a jet cylinder, and jet chambers arranged in an arc shape are symmetrically arranged inside the jet cylinder. Several jet ports are provided on the jet chambers, and one of the jet chambers is connected to a second guide branch pipe, while the other jet chamber is connected to the guide pipe.

[0012] In the above-mentioned degassing tower for treating ammonia nitrogen-containing industrial wastewater, a flash evaporation cylinder is provided at the upper end of the jet cylinder and a diversion cylinder is provided at the lower end. An ammonia exhaust pipe is provided at the upper end of the flash evaporation cylinder, and a negative pressure suction fan is provided on the ammonia exhaust pipe.

[0013] In the above-mentioned degassing tower for treating ammonia nitrogen-containing industrial wastewater, several inclined guide plates are staggered inside the diversion cylinder. An ammonia gas discharge channel is provided at the end of the guide plate near the inner wall of the diversion cylinder, and the lower end of the diversion cylinder is connected to the liquid storage tank.

[0014] In the above-mentioned degassing tower for treating ammonia nitrogen-containing industrial wastewater, the stirring structure includes a stirring motor. The output end of the stirring motor extends toward the inside of the storage tank and is connected to a stirring shaft. The diameter of the stirring shaft gradually increases from bottom to top.

[0015] In the above-mentioned degassing tower for treating ammonia nitrogen-containing industrial wastewater, a drain pipe is installed at the lower end of the storage tank, a drain valve is installed on the drain pipe, a pH sensor for the treated water is installed inside the storage tank, and an annular heating seat is installed around the storage tank.

[0016] Compared with the prior art, the advantages of this utility model are as follows: by using an inlet pH sensor and a three-way valve to divert the wastewater in advance, if the ammonia content in the wastewater is high, it will directly enter the ammonia degassing component for treatment; if the ammonia content in the wastewater is low, it will directly enter the storage tank for treatment; if both the nitrogen and ammonia content in the wastewater are high, it will first enter the storage tank for neutralization and denitrification, and then be guided to the ammonia degassing component for degassing treatment. It can be treated according to the actual situation of the wastewater, and has good flexibility in use. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0018] Figure 2 This is a schematic diagram of the internal structure of the liquid storage tank in this utility model;

[0019] Figure 3 This is a cross-sectional view of the ammonia degassing component in this utility model;

[0020] Figure 4 This is a structural connection block diagram of this utility model;

[0021] In the diagram: 1. Storage tank; 11. Drain pipe; 12. Drain valve; 13. Treated water pH sensor; 14. Annular heating seat; 2. Stirring structure; 21. Stirring motor; 22. Stirring shaft; 3. Alkali inlet pipe; 31. Alkali flow valve; 32. Drainage channel; 33. Outlet channel; 34. Outlet hole; 4. Ammonia degassing assembly; 41. Jet cylinder; 42. Jet chamber; 43. Jet port; 44. Flash evaporation cylinder; 45. Drainage cylinder; 45. Guide plate; 451. Ammonia exhaust channel; 452. Ammonia exhaust pipe; 46. Negative pressure suction fan; 461. Wastewater diversion structure; 5. Wastewater inlet pipe; 511. Inlet water pH sensor; 52. Three-way valve; 53. First guide branch pipe; 531. Inlet flow valve; 54. Second guide branch pipe; 541. High-pressure water pump; 6. Guide structure; 61. Guide pipe; 62. Drainage valve; 63. Water pump; 64. High-pressure water pump. Detailed Implementation

[0022] The present invention will now be described in further detail with reference to the accompanying drawings and specific embodiments.

[0023] like Figure 1-4 As shown, a degassing tower for treating ammonia nitrogen-containing industrial wastewater includes a storage tank 1. A stirring structure 2 extending into the bottom of the storage tank 1 is provided, and an alkaline inlet pipe 3 is connected to the upper end of the storage tank 1. An ammonia degassing component 4 is connected to the upper end of the storage tank 1. A wastewater diversion structure 5 is connected to the storage tank 1. One end of the wastewater diversion structure 5 is connected to the ammonia degassing component 4, and the other end is connected to the storage tank 1. The bottom of the storage tank 1 is connected to the ammonia degassing component 4 through a flow guiding structure 6.

[0024] The wastewater diversion structure 5 includes a wastewater inlet pipe 51, a three-way valve 52 is installed on the wastewater inlet pipe 51, the three-way valve 52 is connected to the storage tank 1 through the first guide branch pipe 53, and the three-way valve 52 is connected to the ammonia degassing component 4 through the second guide branch pipe 54.

[0025] As can be seen, the first diversion branch pipe 53 is equipped with an inlet flow valve 531, the second diversion branch pipe 54 is equipped with a high-pressure water pump 541, and the wastewater inlet pipe 51 is equipped with an inlet pH sensor 511.

[0026] Ammonia nitrogen wastewater enters the three-way valve 52 through the wastewater inlet pipe 51, and the inlet pH sensor 511 monitors the initial pH value of the wastewater in real time before it enters.

[0027] Ammonia nitrogen wastewater is divided into two paths via a three-way valve 52: one path goes directly into the storage tank 1 through the first guide branch pipe 53, which is suitable for wastewater with a pH close to alkaline or that needs to be mixed with alkaline solution first;

[0028] Another route directly delivers the wastewater to the ammonia degassing component 4 via the second diversion branch pipe 54. This is suitable for wastewater with an alkaline pH that can be directly deaerated, enabling on-demand diversion and classified treatment.

[0029] Obviously, the alkali inlet pipe 3 is equipped with an alkali flow valve 31, and the side wall of the storage tank 1 is provided with a flow channel 32 that is connected to the alkali inlet pipe 3. The bottom of the storage tank 1 is provided with a horizontally arranged outlet channel 33 that is connected to the flow channel 32. Several outlet holes 34 are provided on the outlet channel 33.

[0030] If the pH of the wastewater is too low, the alkaline flow valve 31 on the alkaline inlet pipe 3 controls the amount of alkaline solution used, and delivers the alkaline solution to the drainage channel 32 on the side wall of the storage tank 1, and then discharges it through the outlet hole 34 on the outlet channel 33 pipe set horizontally at the bottom of the storage tank 1, so that the alkaline solution is evenly dispersed in the wastewater in the storage tank, avoiding excessive local alkalinity or uneven mixing, and creating a stable alkaline environment for the conversion of ammonia nitrogen into ammonia gas.

[0031] Furthermore, the flow guiding structure 6 includes a flow guiding pipe 61, on which a flow guiding valve 62 is provided. One end of the flow guiding pipe 61 is connected to the liquid storage tank 1 through a water pump 63, and the other end is connected to the ammonia degassing component 4 through a high-pressure water pump 64.

[0032] Specifically, the ammonia degassing component 4 includes a jet cylinder 41, inside which are symmetrically arranged arc-shaped jet chambers 42. Several jet ports 43 are provided on the jet chambers 42, and one of the jet chambers 42 is connected to the second guide branch pipe 54, and the other jet chamber 42 is connected to the guide pipe 61.

[0033] The symmetrically arranged arc-shaped jet chambers 42 inside the jet cylinder 41 receive two streams of wastewater: one stream of high-pressure wastewater from the second guide branch pipe 54; and the other stream of high-pressure wastewater from the guide pipe 61, which is pretreated in the storage tank 1 by the pump 63 and then pressurized by the high-pressure pump 64. The two streams of high-pressure wastewater are ejected at high speed through several jet nozzles 43 on the jet chamber 42, creating a jet effect. This high-speed water flow breaks the surface tension of the water, causing dissolved ammonia gas to be rapidly released from the water.

[0034] Furthermore, the upper end of the jet cylinder 41 is provided with a flash evaporation cylinder 44 and the lower end is provided with a diversion cylinder 45. The upper end of the flash evaporation cylinder 44 is provided with an ammonia exhaust pipe 46, and the ammonia exhaust pipe 46 is provided with a negative pressure suction fan 461.

[0035] The flash evaporation cylinder 44 at the upper end of the jet cylinder 41 provides a flash evaporation space for ammonia: the flash evaporation environment pressure is lower than atmospheric pressure, which further reduces the solubility of ammonia and promotes the flash evaporation of ammonia; at the same time, the negative pressure suction fan 461 on the ammonia exhaust pipe 46 at the upper end of the flash evaporation cylinder 44 generates a continuous negative pressure, which quickly extracts the flashed ammonia away from the system, preventing ammonia from redissolving back into the wastewater and achieving efficient separation of ammonia and wastewater.

[0036] More specifically, several inclined guide plates 451 are staggered inside the diversion cylinder 45. An ammonia gas discharge channel 452 is provided at one end of the guide plate 451 near the inner wall of the diversion cylinder 45, and the lower end of the diversion cylinder 45 is connected to the liquid storage tank 1.

[0037] After jet and flash evaporation treatment, the wastewater enters the guide cylinder 45 at the lower end of the jet cylinder 41. The staggered inclined guide plates 451 inside the cylinder prolong the residence time of the wastewater, allowing the residual ammonia gas in the water to escape fully. The escaped residual ammonia gas enters the flash evaporation cylinder 44 through the ammonia gas discharge channel 452 near the cylinder wall of the guide plate 451, and is finally drawn away by negative pressure. The treated wastewater then flows back to the storage tank 1 through the lower end of the guide cylinder 45 for secondary recycling treatment.

[0038] In detail, the stirring structure 2 includes a stirring motor 21, the output end of which extends toward the inside of the storage tank 1 and is connected to a stirring shaft 22, the diameter of which gradually increases from bottom to top.

[0039] Preferably, a drain pipe 11 is provided at the lower end of the storage tank 1, a drain valve 12 is provided on the drain pipe 11, a treated water pH sensor 13 is provided inside the storage tank 1, and an annular heating seat 14 is provided around the storage tank 1.

[0040] The annular heating seat 14 can heat the wastewater in the tank: the increase in temperature can reduce the solubility of ammonia in water, promote the escape of ammonia from the water, and further enhance the ammonia nitrogen conversion efficiency. The pH sensor 13 monitors the pH value of the mixed wastewater in real time. If the pH does not meet the requirements for ammonia removal, the alkali solution can be added by adjusting the alkali solution flow valve 31 to ensure that the reaction is always carried out under the best alkaline conditions.

[0041] In summary, the principle of this embodiment is as follows: the pH value of the wastewater containing ammonia nitrogen is detected by the inlet pH sensor 511. Based on the pH value of the wastewater, the ammonia nitrogen wastewater is divided into two paths by the three-way valve 52: one path goes directly into the storage tank 1 through the first guide branch pipe 53, which is suitable for wastewater with a pH close to alkaline or that needs to be mixed with alkaline solution first; the other path is directly transported to the ammonia degassing component 4 through the second guide branch pipe 54, which is suitable for wastewater with a pH that has reached alkalinity and can be directly deaerated; the storage tank 1 adds alkali through the alkali inlet pipe 3 via the diversion channel 32 and the outlet channel 33, and the stirring structure 2 and the annular heating seat 14 promote the conversion of ammonia nitrogen into ammonia gas.

[0042] In the ammonia degassing assembly 4, the jet chamber 42 of the jet cylinder 41 releases ammonia through high-pressure wastewater jet, the flash evaporation cylinder 44 extracts ammonia through the ammonia exhaust pipe 46 and the negative pressure suction fan 461, and the diversion cylinder 45 returns the wastewater to the storage tank 1 for secondary treatment; the qualified wastewater is discharged through the drain pipe 11 of the storage tank 1, the treated water pH sensor 13 monitors the wastewater treatment status, and the alkali solution is replenished in real time through the alkali solution inlet pipe 3.

[0043] The specific embodiments described herein are merely illustrative examples illustrating the spirit of this utility model. Those skilled in the art to which this utility model pertains may make various modifications or additions to the described specific embodiments or use similar methods to substitute them, without departing from the spirit of this utility model or exceeding the scope defined by the appended claims.

[0044] Although this paper extensively uses the following components: storage tank 1, drain pipe 11, drain valve 12, treated water pH sensor 13, annular heating seat 14, stirring structure 2, stirring motor 21, stirring shaft 22, alkali inlet pipe 3, alkali flow valve 31, drainage channel 32, outlet channel 33, outlet hole 34, ammonia degassing assembly 4, jet cylinder 41, jet chamber 42, jet port 43, flash evaporation cylinder 44, drainage cylinder 45, and guide plate 451 The terminology used includes ammonia exhaust channel 452, ammonia exhaust pipe 46, negative pressure suction fan 461, wastewater diversion structure 5, wastewater inlet pipe 51, inlet pH sensor 511, three-way valve 52, first guide branch pipe 53, inlet flow valve 531, second guide branch pipe 54, high-pressure water pump 541, guide structure 6, guide pipe 61, diversion valve 62, water pump 63, and high-pressure water pump 64, etc., but the possibility of using other terms is not excluded. The use of these terms is merely for the convenience of describing and explaining the essence of this utility model; interpreting them as any additional limitation would contradict the spirit of this utility model.

Claims

1. A degassing tower for treating ammonia nitrogen-containing industrial wastewater, comprising a storage tank (1), wherein a stirring structure (2) extending toward the interior of the storage tank (1) is provided at the bottom of the storage tank (1), and an alkaline solution inlet pipe (3) is connected to the upper end of the storage tank (1), characterized in that, The upper end of the storage tank (1) is connected to an ammonia degassing component (4), and the storage tank (1) is connected to a wastewater diversion structure (5). One end of the wastewater diversion structure (5) is connected to the ammonia degassing component (4) and the other end is connected to the storage tank (1). The bottom of the storage tank (1) is connected to the ammonia degassing component (4) through a flow guiding structure (6).

2. The degassing column for treating industrial wastewater containing ammonia nitrogen according to claim 1, characterized in that, The wastewater diversion structure (5) includes a wastewater inlet pipe (51), a three-way valve (52) is provided on the wastewater inlet pipe (51), the three-way valve (52) is connected to the storage tank (1) through the first guide branch pipe (53), and the three-way valve (52) is connected to the ammonia degassing component (4) through the second guide branch pipe (54).

3. The degassing column for treating industrial wastewater containing ammonia nitrogen according to claim 2, characterized in that, The first diversion branch pipe (53) is equipped with an inlet flow valve (531), the second diversion branch pipe (54) is equipped with a high-pressure water pump (541), and the wastewater inlet pipe (51) is equipped with an inlet pH sensor (511).

4. The degassing column for treating industrial wastewater containing ammonia nitrogen according to claim 1, characterized in that, The alkaline inlet pipe (3) is equipped with an alkaline flow valve (31), and the side wall of the storage tank (1) is provided with a flow channel (32) that is connected to the alkaline inlet pipe (3). The bottom of the storage tank (1) is provided with a horizontally arranged outlet channel (33) that is connected to the flow channel (32). The outlet channel (33) is provided with a plurality of outlet holes (34).

5. The degassing column for treating industrial wastewater containing ammonia nitrogen according to claim 2, characterized in that, The flow guiding structure (6) includes a flow guiding pipe (61), and a flow guiding valve (62) is provided on the flow guiding pipe (61). One end of the flow guiding pipe (61) is connected to the storage tank (1) through a water pump (63), and the other end is connected to the ammonia degassing component (4) through a high-pressure water pump (64).

6. The degassing tower for treating industrial wastewater containing ammonia nitrogen according to claim 5, characterized in that, The ammonia degassing component (4) includes a jet cylinder (41), and the jet cylinder (41) is symmetrically arranged with arc-shaped jet chambers (42). The jet chambers (42) are provided with a plurality of jet ports (43), and one of the jet chambers (42) is connected to the second guide branch pipe (54), and the other jet chamber (42) is connected to the guide pipe (61).

7. The degassing column for treating industrial wastewater containing ammonia nitrogen according to claim 6, characterized in that, The upper end of the jet cylinder (41) is provided with a flash evaporation cylinder (44) and the lower end is provided with a diversion cylinder (45). The upper end of the flash evaporation cylinder (44) is provided with an ammonia exhaust pipe (46), and the ammonia exhaust pipe (46) is provided with a negative pressure suction fan (461).

8. The degassing column for treating industrial wastewater containing ammonia nitrogen according to claim 7, characterized in that, The drainage cylinder (45) is provided with several inclined guide plates (451) arranged alternately inside. The guide plate (451) is provided with an ammonia discharge channel (452) at one end near the inner wall of the drainage cylinder (45), and the lower end of the drainage cylinder (45) is connected to the storage tank (1).

9. A degassing tower for treating ammonia-nitrogen-containing industrial wastewater according to claim 1, characterized in that, The stirring structure (2) includes a stirring motor (21), the output end of which extends toward the inside of the storage tank (1) and is connected to a stirring shaft (22), the diameter of which gradually increases from bottom to top.

10. The degassing column for treating industrial wastewater containing ammonia nitrogen according to claim 9, characterized in that, The storage tank (1) is provided with a drain pipe (11) at the lower end, and a drain valve (12) is provided on the drain pipe (11). A treatment water pH sensor (13) is provided inside the storage tank (1), and an annular heating seat (14) is provided around the storage tank (1).

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