CN212050613U - Rectification absorption system of ammonia nitrogen waste water - Google Patents
Rectification absorption system of ammonia nitrogen waste water Download PDFInfo
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- CN212050613U CN212050613U CN202020470816.1U CN202020470816U CN212050613U CN 212050613 U CN212050613 U CN 212050613U CN 202020470816 U CN202020470816 U CN 202020470816U CN 212050613 U CN212050613 U CN 212050613U
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Abstract
The utility model discloses a rectification absorption system of ammonia nitrogen waste water, including high-efficient rotatory rectifying bed, pre-heater, one-level condenser, second grade condenser, vapour and liquid separator, tail gas condenser, buffer tank, tail gas absorption tank, charge pump, backwash pump, ammonia nitrogen waste water storage tank, water storage tank and aqueous ammonia storage tank. The utility model has the advantages of it is following and effect: the high-efficiency rotary rectifying bed is used for replacing a traditional rectifying tower to carry out rectification and purification on the ammonia nitrogen wastewater, and condensation and absorption are carried out on tail gas, the whole device is more compact and reasonable in structure, small in size, low in height and small in occupied area, the treated ammonia nitrogen wastewater can reach the national first-level discharge standard, the energy consumption is low, and management and maintenance are convenient.
Description
Technical Field
The utility model relates to an ammonia nitrogen wastewater treatment and hypergravity rectification technical field, in particular to ammonia nitrogen wastewater's rectification absorption system.
Background
The pollutants generated in the industrial production process not only destroy the ecological environment but also seriously threaten the health of human beings if being directly discharged. Ammonia nitrogen is a main pollutant causing water eutrophication, ammonia nitrogen wastewater is common industrial wastewater in industrial production process, and the pollution to the environment can be reduced by treatment of a physical chemical method, a biochemical method and the like. CN102060406A discloses a physicochemical method for treating ammonia nitrogen wastewater, and reduces the content of ammonia nitrogen in the wastewater by a packed tower stripping absorption process. CN203602435U discloses an ammonia nitrogen wastewater treatment process, which is to carry out deamination condensation recovery through a rectifying tower.
In the method for treating the ammonia nitrogen wastewater, the rectification stripping purification is still carried out on the ammonia nitrogen wastewater by adopting the rectification tower, the treated wastewater has higher ammonia content, the purity of purified ammonia water is low, the problems of blockage in the tower and the like are easily caused in the operation process of the rectification tower equipment, and the tower equipment has large volume and high energy consumption and cannot meet the requirements of energy conservation and emission reduction.
SUMMERY OF THE UTILITY MODEL
The utility model aims at providing a rectification absorption system of ammonia nitrogen waste water solves current ammonia nitrogen waste water treatment in-process, and tower equipment is bulky, and the energy consumption is high and discharge problem not up to standard.
The above technical purpose of the present invention can be achieved by the following technical solutions: a rectification absorption system of ammonia nitrogen wastewater comprises an ammonia nitrogen wastewater storage tank, wherein an outlet of the ammonia nitrogen wastewater storage tank is connected with a feed pump, the outlet of the feed pump is connected with a preheater, the outlet of the preheater is connected with a high-efficiency rotary rectifying bed, the gas outlet of the high-efficiency rotary rectifying bed is connected with a first-stage condenser, the outlet of the first-stage condenser is connected with a second-stage condenser, the outlet of the secondary condenser is connected with a gas-liquid separator, the outlet of the gas-liquid separator is connected with a reflux pump, the reflux pump is connected with a reflux port of the high-efficiency rotary rectifying bed through a first pipeline, the first pipeline is connected with an ammonia storage tank through a second pipeline, the liquid outlet of the high-efficiency rotary rectifying bed is connected with the liquid inlet of the preheater, the first gas outlet of the gas-liquid separator is connected with a tail gas condenser, and the outlet of the tail gas condenser is connected with a tail gas absorption tank.
Further setting the following steps: the feeding pump is connected with the preheater through a third pipeline, and a third regulating valve and a third flow meter are mounted on the third pipeline.
Further setting the following steps: and a first regulating valve and a first flowmeter are arranged on the first pipeline between the joint of the first pipeline and the second pipeline and the efficient rotary rectifying bed.
Further setting the following steps: the high-efficiency rotary rectifying bed is characterized in that a second regulating valve and a second flowmeter are installed on the second pipeline, a gas inlet of the high-efficiency rotary rectifying bed is connected with a low-pressure steam pipe through a fourth pipeline, and a fourth regulating valve and a fourth flowmeter are installed on the fourth pipeline.
Further setting the following steps: the first-stage condenser is connected with a circulating water pipe, and the second-stage condenser, the tail gas condenser and the tail gas absorption tank are connected with a low-temperature water pipe.
Further setting the following steps: and a buffer tank is connected between the tail gas condenser and the tail gas absorption tank, and the outlet of the preheater is connected with a water storage tank.
Further setting the following steps: high-efficient rotatory rectifying bed including the casing that has the inner chamber, rotate set up in the inside pivot of casing, set up in the pivot move the rotor, set up in the quiet rotor of inner chamber wall and drive pivot pivoted drive assembly, be equipped with feed inlet, backward flow mouth, liquid outlet, gas feed and gas outlet on the casing, it is equipped with and moves concentric vortex circle to move the one side of rotor towards quiet rotor, it is provided with a plurality of constitutions one and moves vortex circle group to move concentric vortex circle along the radial interval arrangement who moves the rotor, the one side that the rotor was moved to quiet rotor orientation is equipped with quiet concentric vortex circle, quiet concentric vortex circle is provided with a plurality of constitutions quiet vortex circle group along the radial interval arrangement of quiet rotor, it sets up and is formed with the runner that the intercommunication inner chamber between the two to move vortex circle group and quiet vortex circle group.
Further setting the following steps: the static rotor and the movable rotor form a rotor group, and the rotor group is axially arranged along the rotating shaft at intervals.
Further setting the following steps: the outer parcel of casing has the heat preservation, drive assembly is including setting up in the motor of casing, setting up in the driven pulleys of pivot, setting up in the driving pulley of motor shaft and the belt of connecting driving pulley and driven pulleys.
The utility model also aims to provide a rectification absorption method of ammonia nitrogen wastewater, which can realize standard discharge and low emission standard of discharged pollution.
The above technical purpose of the present invention can be achieved by the following technical solutions: a rectification absorption method of ammonia nitrogen wastewater comprises the steps of pumping waste ammonia water from an ammonia water storage tank into a preheater through a feed pump for preheating, controlling the feed flow to enter a high-efficiency rotary rectification bed through a third regulating valve, and controlling the amount of saturated steam entering the high-efficiency rotary rectification bed through a fourth regulating valve; liquid enters the inside of the high-efficiency rotary rectifying bed and is thrown out under the action of centrifugal force, saturated steam goes from the outer side of the shell to the center, gas-liquid two phases are in countercurrent contact between a moving concentric turbulent ring and a static concentric turbulent ring for heat conduction, ammonia water steam enters a first-stage condenser from a gas outlet of the high-efficiency rotary rectifying bed for condensation, the condensed liquid enters a second-stage condenser for cooling and then flows into a gas-liquid separator, part of the condensed liquid flows back into the high-efficiency rotary rectifying bed through a reflux pump, and the other part of the condensed liquid is extracted into an ammonia water storage tank and controls the reflux and extraction flow through a second regulating valve; a small amount of ammonia water gas separated by the gas-liquid separator enters a tail gas condenser for condensation, and non-condensable gas and entrained trace ammonia gas enter a buffer tank and then enter a tail gas absorption tank for absorption; the water at the bottom of the high-efficiency rotary rectifying bed flows into the preheater and flows into the water storage tank after exchanging heat with the feed material, and the reflux ratio is controlled.
To sum up, the utility model discloses following beneficial effect has: the high-efficiency rotary rectifying bed is used for replacing a traditional rectifying tower to carry out rectification and purification on the ammonia nitrogen wastewater, and condensation and absorption are carried out on tail gas, the whole device is more compact and reasonable in structure, small in size, low in height and small in occupied area, the treated ammonia nitrogen wastewater can reach the national first-level discharge standard, the energy consumption is low, and management and maintenance are convenient.
Drawings
FIG. 1 is a block diagram of a system according to a first embodiment;
FIG. 2 is a schematic structural diagram of an efficient rotating rectification bed in the first embodiment.
In the figure: 1. an ammonia nitrogen wastewater storage tank; 2. a feed pump; 3. a preheater; 4. a high-efficiency rotary rectifying bed; 40. an inner cavity; 41. a housing; 42. a rotating shaft; 43. a moving rotor; 44. a stationary rotor; 45. a drive assembly; 46. a feed inlet; 47. a return port; 48. a liquid outlet; 49. a gas inlet; 50. a gas outlet; 5. a first-stage condenser; 6. a secondary condenser; 7. a gas-liquid separator; 8. a reflux pump; 9. a first conduit; 10. a second conduit; 11. an ammonia water storage tank; 12. a tail gas condenser; 13. a tail gas absorption tank; 14. a third pipeline; 15. a third regulating valve; 16. a third flow meter; 17. a first regulating valve; 18. a first flow meter; 19. a second regulating valve; 20. a second flow meter; 21. a fourth conduit; 22. a low pressure steam pipe; 23. a fourth regulating valve; 24. a fourth flow meter; 25. a circulating water pipe; 26. a low-temperature water pipe; 27. a buffer tank; 28. a water storage tank; 30. moving the concentric turbulence ring; 31. a static concentric turbulence ring; 32. a flow channel; 33. and (7) an insulating layer.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings.
Example one
Refer to fig. 1 and fig. 2, a rectification absorption system of ammonia nitrogen waste water, including ammonia nitrogen waste water storage tank 1, there is charge pump 2 in the export of ammonia nitrogen waste water storage tank 1 through the pipe connection, the export of charge pump 2 is connected with pre-heater 3 through third pipeline 14, there is high-efficient rotatory rectification bed 4 in the export of pre-heater 3 through the pipe connection, there is one-level condenser 5 in the gas outlet 50 of high-efficient rotatory rectification bed 4 through the pipe connection, there is second grade condenser 6 in the export of one-level condenser 5 through the pipe connection, there is vapour and liquid separator 7 in the export of second grade condenser 6 through the pipe connection, there is backwash pump 8 in the export of vapour and liquid separator 7 through the pipe connection, backwash pump 8 is connected with the backward flow mouth 47 of high-.
Be connected with ammonia storage tank 11 through second pipeline 10 on the first pipeline 9, through the pipe connection between the liquid outlet 48 of high-efficient rotatory rectifying bed 4 and the 3 liquid inlets of pre-heater, there is tail gas condenser 12 first gas outlet of vapour and liquid separator 7 through the pipe connection, and there is buffer tank 27 in the export of tail gas condenser 12 through the pipe connection, and there is tail gas absorption jar 13 in the export of buffer tank 27 through the pipe connection. The outlet of the preheater 3 is connected to a water storage tank 28 via a pipe. The first-stage condenser 5 is connected with a circulating water pipe 25 through a pipeline, and the second-stage condenser 6, the tail gas condenser 12 and the tail gas absorption tank 13 are connected with a low-temperature water pipe 26 through pipelines.
A third regulating valve 15 and a third flow meter 16 are arranged on the third pipeline 14; a first regulating valve 17 and a first flow meter 18 are arranged on the first pipeline 9 and between the joint of the first pipeline 9 and the second pipeline 10 and the high-efficiency rotary rectifying bed 4; the second pipe 10 is provided with a second regulating valve 19 and a second flowmeter 20. The gas inlet 49 of the high-efficiency rotary rectifying bed 4 is connected with a low-pressure steam pipe 22 through a fourth pipeline 21, and a fourth regulating valve 23 and a fourth flowmeter 24 are installed on the fourth pipeline 21.
The high-efficiency rotary rectifying bed 4 comprises a shell 41 with an inner cavity 40, a rotating shaft 42 rotatably arranged in the shell 41, a movable rotor 43 fixedly arranged on the rotating shaft 42, a static rotor 44 fixedly arranged on the wall of the inner cavity 40 and a driving assembly 45 for driving the rotating shaft 42 to rotate. The rotating shaft 42 is vertically arranged, the movable rotor 43 and the rotating shaft 42 are coaxially arranged, the static rotor 44 and the rotating shaft 42 are coaxially arranged, and the shell 41 is provided with a feed inlet 46, a return port 47, a liquid outlet 48, a gas inlet 49 and a gas outlet 50.
One surface of the movable rotor 43 facing the static rotor 44 is fixedly provided with movable concentric turbulence rings 30, and the movable concentric turbulence rings 30 are arranged at intervals along the radial direction of the movable rotor 43 to form a movable turbulence ring group. The movable concentric turbulence rings 30 are concentrically arranged, and the movable concentric turbulence rings 30 and the rotating shaft 42 are concentrically arranged. The static concentric turbulence ring 31 is fixedly arranged on one surface of the static rotor 44 facing the moving rotor 43, and a plurality of static concentric turbulence rings 31 are arranged at intervals along the radial direction of the static rotor 44 to form a static turbulence ring group. The static concentric turbulence rings 31 are concentrically arranged, and the static concentric turbulence rings 31 and the rotating shaft 42 are concentrically arranged. The dynamic turbulence ring set and the static turbulence ring set are arranged in a staggered manner, and a flow channel 32 communicated with the inner cavity 40 is formed between the dynamic turbulence ring set and the static turbulence ring set.
The stationary rotor 44 and the moving rotor 43 constitute a rotor group, and a plurality of rotor groups are arranged at intervals in the axial direction of the rotating shaft 42. The casing 41 is externally fixed with a heat insulation layer 33, and the driving assembly 45 comprises a motor fixedly arranged on the casing 41, a driven pulley fixedly arranged on the rotating shaft 42, a driving pulley fixedly arranged on the motor shaft, and a belt connecting the driving pulley and the driven pulley. The first-stage condenser 5 and the second-stage condenser 6 can adopt a shell and tube heat exchanger, a spiral wound tube heat exchanger or a spiral plate heat exchanger.
Example two
Process 1
A rectification absorption method of ammonia nitrogen wastewater is characterized in that 1.5% waste ammonia water is pumped into a preheater 3 from an ammonia water storage tank 11 through a feed pump 2 for preheating, the temperature after preheating is 70 ℃, a third regulating valve 15 controls the feed flow to be 500kg/h and enters a high-efficiency rotary rectification bed 4, and a fourth regulating valve 23 controls the flow of 4 kg of 144 ℃ saturated vapor to be 95kg/h and enters a gas inlet 49 of the high-efficiency rotary rectification bed 4. Liquid enters the center of a movable rotor 43 of the high-efficiency rotary rectifying bed 4, is thrown out under the action of centrifugal force, saturated steam goes away from the outer side of the shell 41 to the center, gas-liquid phases are in countercurrent contact between a dynamic disturbance flow ring and a static disturbance flow ring and have high mass transfer and heat transfer efficiency, finally ammonia water steam enters the first-stage condenser 5 from a gas outlet 50 of the high-efficiency rotary rectifying bed 4 for condensation, the condensed liquid enters the second-stage condenser 6 for cooling and then flows into the gas-liquid separator 7, then part of the condensed liquid flows back into the high-efficiency rotary rectifying bed 4 through a reflux pump 8, and part of the condensed liquid is extracted into the ammonia water storage tank 11, and the reflux and extraction flow are controlled through the first regulating valve. A small amount of ammonia water gas separated by the gas-liquid separator 7 enters the tail gas condenser 12 for condensation, and non-condensable gas and entrained trace ammonia gas enter the buffer tank 27 and then enter the tail gas absorption tank 13 for absorption. The water at the bottom of the high-efficiency rotary rectifying bed 4 flows into the preheater 3 to exchange heat with the feeding material and then flows into the water storage tank 28. The reflux ratio is 1.3, the gas outlet temperature of the rotary rectifying bed 4 is 38 ℃, the purity of ammonia water is 25.1 percent, the ammonia residue in wastewater is 8PPM, and a vent hole is not detected.
Process 2
A rectification absorption method of ammonia nitrogen wastewater is characterized in that 5% waste ammonia water is pumped into a preheater 3 from an ammonia water storage tank 11 through a feed pump 2 for preheating, the temperature after preheating is 60 ℃, a third regulating valve 15 controls the feed flow to be 800kg/h and enters a high-efficiency rotary rectification bed 4, and a fourth regulating valve 23 controls the flow of 4 kg of 144 ℃ saturated steam to be 160kg/h and enters a gas inlet 49 of the high-efficiency rotary rectification bed 4. Liquid enters the center of a movable rotor 43 of the high-efficiency rotary rectifying bed 4, is thrown out under the action of centrifugal force, saturated steam goes away from the outer side of the shell 41 to the center, gas-liquid phases are in countercurrent contact between a dynamic disturbance flow ring and a static disturbance flow ring and have high mass transfer and heat transfer efficiency, finally ammonia water steam enters the first-stage condenser 5 from a gas outlet 50 of the high-efficiency rotary rectifying bed 4 for condensation, the condensed liquid enters the second-stage condenser 6 for cooling and then flows into the gas-liquid separator 7, then part of the condensed liquid flows back into the high-efficiency rotary rectifying bed 4 through a reflux pump 8, and part of the condensed liquid is extracted into the ammonia water storage tank 11, and the reflux and extraction flow are controlled through the first regulating valve. A small amount of ammonia water gas separated by the gas-liquid separator 7 enters the tail gas condenser 12 for condensation, and non-condensable gas and entrained trace ammonia gas enter the buffer tank 27 and then enter the tail gas absorption tank 13 for absorption. The water at the bottom of the high-efficiency rotary rectifying bed 4 flows into the preheater 3 to exchange heat with the feeding material and then flows into the water storage tank 28. The reflux ratio is 0, the temperature of a gas outlet of the rotary rectifying bed 4 is 20.7 ℃, the purity of ammonia water is 35.2 percent, 6PPM of ammonia residue in wastewater is remained, and a vent hole is not detected.
The present embodiment is only for explaining the present invention, and it is not limited to the present invention, and those skilled in the art can make modifications to the present embodiment without inventive contribution as required after reading the present specification, but all of them are protected by patent laws within the scope of the claims of the present invention.
Claims (9)
1. A rectification absorption system of ammonia nitrogen waste water which characterized in that: comprises an ammonia nitrogen wastewater storage tank (1), wherein an outlet of the ammonia nitrogen wastewater storage tank (1) is connected with a feed pump (2), an outlet of the feed pump (2) is connected with a preheater (3), an outlet of the preheater (3) is connected with a high-efficiency rotary rectifying bed (4), a gas outlet (50) of the high-efficiency rotary rectifying bed (4) is connected with a one-stage condenser (5), an outlet of the one-stage condenser (5) is connected with a second-stage condenser (6), an outlet of the second-stage condenser (6) is connected with a gas-liquid separator (7), an outlet of the gas-liquid separator (7) is connected with a reflux pump (8), the reflux pump (8) is connected with a reflux port (47) of the high-efficiency rotary rectifying bed (4) through a first pipeline (9), an ammonia water storage tank (11) is connected on the first pipeline (9) through a second pipeline (10), and a liquid outlet (48) of the high-efficiency rotary rectifying bed (4) is connected with a liquid inlet, a first gas outlet of the gas-liquid separator (7) is connected with a tail gas condenser (12), and an outlet of the tail gas condenser (12) is connected with a tail gas absorption tank (13).
2. The rectification absorption system for ammonia nitrogen wastewater according to claim 1, which is characterized in that: the feeding pump (2) is connected with the preheater (3) through a third pipeline (14), and a third regulating valve (15) and a third flow meter (16) are installed on the third pipeline (14).
3. The rectification absorption system for ammonia nitrogen wastewater according to claim 1, which is characterized in that: and a first regulating valve (17) and a first flow meter (18) are arranged on the first pipeline (9) and between the joint of the first pipeline (9) and the second pipeline (10) and the efficient rotary rectifying bed (4).
4. The rectification absorption system for ammonia nitrogen wastewater according to claim 1, which is characterized in that: install second governing valve (19) and second flowmeter (20) on second pipeline (10), gas inlet (49) of high-efficient rotatory rectifying bed (4) are connected with low pressure steam pipe (22) through fourth pipeline (21), install fourth governing valve (23) and fourth flowmeter (24) on fourth pipeline (21).
5. The rectification absorption system for ammonia nitrogen wastewater according to claim 1, which is characterized in that: the first-stage condenser (5) is connected with a circulating water pipe (25), and the second-stage condenser (6), the tail gas condenser (12) and the tail gas absorption tank (13) are connected with a low-temperature water pipe (26).
6. The rectification absorption system for ammonia nitrogen wastewater according to claim 1, which is characterized in that: a buffer tank (27) is connected between the tail gas condenser (12) and the tail gas absorption tank (13), and a water storage tank (28) is connected to an outlet of the preheater (3).
7. The rectification absorption system for ammonia nitrogen wastewater according to claim 1, which is characterized in that: the efficient rotary rectifying bed (4) comprises a shell (41) with an inner cavity (40), a rotating shaft (42) arranged in the shell (41) in a rotating mode, a moving rotor (43) arranged in the rotating shaft (42), a static rotor (44) arranged on the wall of the inner cavity (40) and a driving assembly (45) driving the rotating shaft (42) to rotate, wherein a feed inlet (46), a backflow port (47), a liquid outlet (48), a gas inlet (49) and a gas outlet (50) are formed in the shell (41), one side, facing the static rotor (44), of the moving rotor (43) is provided with a moving concentric turbulence ring (30), the moving concentric turbulence ring (30) is provided with a plurality of static turbulence ring groups along the radial interval arrangement of the moving rotor (43), one side, facing the moving rotor (43), of the static rotor (44) is provided with a static concentric turbulence ring (31), and the static concentric turbulence ring (31) is provided with a plurality of static turbulence ring groups along the radial interval arrangement of the static rotor (44), the dynamic turbulence ring set and the static turbulence ring set are arranged in a staggered mode, and a flow channel (32) communicated with the inner cavity (40) is formed between the dynamic turbulence ring set and the static turbulence ring set.
8. The rectification absorption system for ammonia nitrogen wastewater according to claim 7, characterized in that: the static rotor (44) and the movable rotor (43) form a rotor group, and the rotor group is axially arranged along the rotating shaft (42) at intervals.
9. The rectification absorption system for ammonia nitrogen wastewater according to claim 7, characterized in that: the heat preservation (33) is wrapped up to the outer parcel of casing (41), drive assembly (45) including set up in the motor of casing (41), set up in the driven pulley of pivot (42), set up in the driving pulley of motor shaft and connect the belt of driving pulley and driven pulley.
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CN111348705A (en) * | 2020-04-02 | 2020-06-30 | 浙江亚光科技股份有限公司 | Rectification absorption system and method for ammonia nitrogen wastewater |
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