Ammonia-nitrogen-containing high-conductivity condensed water resource recycling system
By using a multi-stage ion exchange system and online detection and control, the problem of resource utilization of high conductivity condensate was solved, and the levels of ammonia nitrogen and conductivity were reduced to meet industrial pure water standards, thereby reducing wastewater treatment costs.
Patent Information
- Application Number
- CN202520335228.X
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-02-28
- Publication Date
- 2026-01-30
- Estimated Expiration
- 2035-02-28
AI Technical Summary
The high conductivity of condensate containing ammonia nitrogen is costly to treat and cannot be utilized as a resource, resulting in the condensate being discharged externally, which increases wastewater treatment costs.
A multi-stage ammonia nitrogen removal and conductivity reduction ion exchange system is adopted, including primary and secondary ammonia nitrogen removal ion exchange columns and conductivity reduction ion exchange columns. Lanxiao resin is used for ammonia nitrogen removal and mixed bed resin is used to reduce conductivity. The feed rate is controlled online and the solenoid valve is interlocked to ensure that the ammonia nitrogen content is less than 0.5 mg/L and the conductivity is less than 0.5 μS/cm.
It realizes the resource utilization of condensate, and the ammonia nitrogen content and conductivity meet the industrial pure water standards, reducing wastewater discharge and lowering wastewater treatment costs.
Smart Images
Figure CN223852355U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The application belongs to the technical field of wastewater recycling, and particularly relates to a high-conductivity condensate water resource utilization system containing ammonia nitrogen. BACKGROUND
[0002] Production of cobalt carbonate produces a large amount of wastewater containing Co 2+ , Cl - , NH4 + , CO3 2+ , HCO3 + . In order to reduce the amount of wastewater discharge and make it recycled and reused, the pH value of the wastewater is first adjusted for decarbonization, and then the pH value of the decarbonized wastewater is adjusted. The wastewater is removed of heavy metals using ion exchange resin, so that the cobalt content of the wastewater after removal of heavy metals is less than 1 mg / L. Then, MVR is used for evaporation, the ammonium chloride obtained by evaporation is sold, and the condensate water produced is reused as pure water. However, during the MVR evaporation process, free ammonia nitrogen and a small amount of ammonium chloride in the wastewater volatilize into the condensate water, resulting in that the ammonia nitrogen content in the condensate water exceeds the required index. The ammonia nitrogen content in the condensate water is usually within 20-1200 mg / L, and the conductivity is also relatively high, usually within 40-900 us / cm. Therefore, if the condensate water is used as pure water, the ammonia nitrogen and impurity elements will seriously exceed the industrial pure water index, and the condensate water needs to be treated to remove the ammonia nitrogen and impurity elements to reduce the conductivity, so that the ammonia nitrogen and conductivity of the water are respectively controlled within the index range of the industrial pure water. At present, this part of the condensate water can only be discharged as wastewater and discharged to the company's wastewater treatment station for unified treatment. The workshop needs to pay 3.5 million yuan of treatment fee of the condensate water to the group company every year, and the wastewater treatment cost is high. Therefore, it is necessary to develop a condensate water resource utilization method to solve this drawback. CONTENT OF THE UTILITY MODEL
[0003] The utility model discloses a high-conductivity condensate water resource utilization system containing ammonia nitrogen to solve the problem that the ammonia nitrogen containing condensate water treatment cost is high and cannot be resource utilization.
[0004] To achieve the above object, the utility model adopts the following technical scheme:
[0005] The utility model relates to a kind of ammonia nitrogen-containing high conductivity condensate water resource utilization system, including condensate storage tank, condensate storage tank is connected with primary ammonia nitrogen removal ion exchange column by pipeline, primary ammonia nitrogen removal ion exchange column is connected with primary liquid storage tank by pipeline, primary liquid storage tank is connected with secondary ammonia nitrogen removal ion exchange column and conductivity reduction ion exchange column respectively by pipeline, secondary ammonia nitrogen removal ion exchange column is connected with secondary liquid storage tank by pipeline, secondary liquid storage tank is connected with conductivity reduction ion exchange column by pipeline, and conductivity reduction ion exchange column is connected with pure water storage tank by pipeline;Condensate storage tank, primary liquid storage tank, secondary liquid storage tank and pure water storage tank are all installed with ammonia nitrogen on-line detector, and the ammonia nitrogen on-line detector installed on primary liquid storage tank is respectively interlocked with the electromagnetic valve installed in the front end of secondary ammonia nitrogen removal ion exchange column and conductivity reduction ion exchange column;Condensate storage tank and pure water storage tank are also installed with conductivity on-line detector.
[0006] The utility model has the advantages of:
[0007] The utility model is based on the thought of removing ammonia nitrogen and then removing conductivity, and is used to remove ammonia nitrogen from the condensate water produced by MVR evaporation of cobalt carbonate, so that the ammonia nitrogen content after removal is controlled to be less than 0.5 mg / l; and the water after removal of ammonia nitrogen is used to remove impurities and reduce conductivity by using mixed bed resin, so that the conductivity after removal of impurities is less than 0.5 us / cm. Therefore, the condensate water produced by MVR evaporation has an ammonia nitrogen content of less than 0.5 mg / l and a conductivity of less than 0.5 us / cm after one or two stages of removal of ammonia nitrogen and one stage of removal of impurities and reduction of conductivity, so that the water can be used as pure water and applied to the preparation of cobalt chloride solution, ammonium bicarbonate solution, cobalt carbonate or aluminum-doped cobalt carbonate slurry in the production of cobalt carbonate, while reducing the discharge of wastewater, achieving resource utilization and saving wastewater treatment costs. BRIEF DESCRIPTION OF DRAWINGS
[0008] Figure 1 The utility model is a system structure diagram.
[0009] In the drawing, 1 is a condensate storage tank, 2 is a primary ammonia nitrogen removal ion exchange column, 3 is a primary liquid storage tank, 4 is a secondary ammonia nitrogen removal ion exchange column, 5 is a conductivity reduction ion exchange column, 6 is a secondary liquid storage tank, 7 is a pure water storage tank, 8 is an ammonia nitrogen on-line detector, and 9 is a conductivity on-line detector. DETAILED DESCRIPTION
[0010] The utility model will be further explained in combination with the drawings.
[0011] For example, Figure 1The utility model discloses a kind of ammonia-nitrogen-containing high-conductivity condensate water resource utilization systems, including condensate storage tank 1, condensate storage tank 1 is connected with primary ammonia-nitrogen-removing ion exchange column 2 by pipeline, primary ammonia-nitrogen-removing ion exchange column 2 is connected with primary liquid storage tank 3 by pipeline, primary liquid storage tank 3 is connected with secondary ammonia-nitrogen-removing ion exchange column 4 and conductivity-reducing ion exchange column 5 respectively by pipeline, secondary ammonia-nitrogen-removing ion exchange column 4 is connected with secondary liquid storage tank 6 by pipeline, secondary liquid storage tank 6 is connected with conductivity-reducing ion exchange column 5 by pipeline, conductivity-reducing ion exchange column 5 is connected with pure water storage tank 7 by pipeline;Condensate storage tank 1, primary liquid storage tank 3, secondary liquid storage tank 6 and pure water storage tank 7 are all installed with ammonia-nitrogen on-line detector 8, and ammonia-nitrogen on-line detector 8 installed on primary liquid storage tank 3 is respectively connected with electromagnetic valve interlock control installed in front of secondary ammonia-nitrogen-removing ion exchange column 4 and conductivity-reducing ion exchange column 5;Condensate storage tank 1 and pure water storage tank 7 are also installed with conductivity on-line detector 9. Wherein, LXW-010 brand blue-xiao ammonia-nitrogen-removing resin is contained in primary ammonia-nitrogen-removing ion exchange column 2 and secondary ammonia-nitrogen-removing ion exchange column 4;LX-02 brand blue-xiao mixed-bed resin is contained in conductivity-reducing ion exchange column 5.
[0012] The working process of the utility model is as follows:
[0013] The condensed water in the condensed water storage tank 1 enters the first ammonia and nitrogen ion exchange column 2 to remove ammonia and nitrogen by using the blue and Xiao resin (LXW-010) after the ammonia and nitrogen content and the conductivity value are measured by the ammonia and nitrogen on-line detector and the conductivity on-line detector installed on the condensed water storage tank 1, the liquid inlet speed and the liquid outlet speed of the ion exchange column are controlled to be 6-8BV (i.e. the flow rate per hour is 6-8 times the volume of the filled resin); the liquid outlet after the first ammonia and nitrogen removal is stored in the first liquid storage tank 3, and the ammonia and nitrogen content of the water in the first liquid storage tank is detected in real time by using the ammonia and nitrogen detector installed thereon; since the ammonia and nitrogen on-line detector installed on the first liquid storage tank 3 is connected with the electromagnetic valves installed at the front ends of the second ammonia and nitrogen ion exchange column 4 and the conductivity reduction ion exchange column 5 in interlocking control, when the ammonia and nitrogen detection value of the first liquid storage tank 3 is greater than or equal to 0.5mg / L, the electromagnetic valve at the front end of the second ammonia and nitrogen ion exchange column 4 is opened, and the water in the first liquid storage tank 3 enters the second ammonia and nitrogen ion exchange column 4 to continue the second ammonia and nitrogen removal by using the blue and Xiao resin (LXW-010), the liquid inlet speed is controlled to be 8-10BV, the liquid outlet after the second ammonia and nitrogen removal is stored in the second liquid storage tank 6, and the ammonia and nitrogen content of the water in the second liquid storage tank 6 is less than 0.5mg / L, so that the water can be discharged into the conductivity reduction ion exchange column 5 to remove impurities and reduce conductivity; when the ammonia and nitrogen detection value of the first liquid storage tank 3 is less than 0.5mg / L, the electromagnetic valve at the front end of the conductivity reduction ion exchange column 5 is opened, and the water in the first liquid storage tank 3 directly enters the conductivity reduction ion exchange column 5 to remove residual anions and cations by using the blue and Xiao LX-02 mixed bed resin, the liquid inlet speed and the liquid outlet speed of the ion exchange column are controlled to be 6-8BV, and the wastewater after the impurities removal enters the pure water storage tank, the conductivity on-line detector and the ammonia and nitrogen on-line detector are installed on the pure water storage tank to detect in real time, so that the conductivity is less than 0.5us / cm.
[0014] The above working process is the general working process of the present application, the ammonia and nitrogen removal resin and the mixed bed resin can also use other resins with the same function in the prior art, and the ammonia and nitrogen removal and the anion and cation removal to reduce conductivity are used as the criterion. In addition, if the ammonia and nitrogen content of the water in the second liquid storage tank 6 exceeds the standard, the water can be pumped into the first liquid storage tank 3 to remove ammonia and nitrogen again, and if the conductivity of the water in the pure water storage tank 7 exceeds the standard, the water can also be returned to the conductivity reduction ion exchange column 5 to reduce conductivity again until the conductivity reaches the standard.
[0015] The following gives several specific examples to illustrate the ammonia and nitrogen removal and conductivity reduction effect of the present application.
[0016] Example 1
[0017] The ammonia and nitrogen content of the condensed water in the original condensed water storage tank is 20mg / l, and the conductivity is 40us / cm, and the water is pumped into the first ammonia and nitrogen ion exchange column at a flow rate of 8BV (32m 3A flow rate of 4 m³ / h is fed into a primary ion exchange column (resin packing volume 4 m³ / h) containing Lanxiao ammonia nitrogen removal resin (brand name LXW-010). 3 Ammonia nitrogen removal is performed at a flow rate of 8 BV (32 m). 3 The ammonia nitrogen content in the effluent is 0.24 mg / L (per hour), and it is discharged into the primary storage tank after the primary ammonia nitrogen removal process. Then it is pumped into a conductivity-reducing ion exchange column packed with mixed-bed resin (resin packing volume 4m³). 3 The inflow and outflow velocity is 8 BVm. 3 / h, which is (32m) 3 After impurity removal and conductivity reduction, the water is discharged into a pure water storage tank. Measurements show that the ammonia nitrogen content of the effluent is 0.24 mg / L, and the conductivity is 0.31 μS / cm.
[0018] Example 2
[0019] The ammonia nitrogen content of the condensate in the original condensate storage tank was 580 mg / L, and the conductivity was 478 μS / cm. At a rate of 7 BV (28 m³ / h) per hour... 3 A flow rate of 100 m³ / h is fed into an ion exchange column packed with Lanxiao ammonia nitrogen removal resin (brand name LXW-010) (resin packing volume 4 m³ / h). 3 Ammonia nitrogen removal is performed at a discharge rate of 7 BV (28 m). 3 The effluent contains 0.68 mg / L of ammonia nitrogen per hour. It is discharged into the primary storage tank after the primary ammonia nitrogen removal process, and then enters the secondary ammonia nitrogen removal ion exchange column at a flow rate of 10 BV, with an effluent velocity of 7 BV, before being discharged into the secondary storage tank. It is then pumped into a conductivity-reducing ion exchange column packed with mixed-bed resin (resin packing volume 4 m³ / h). 3 The inflow and outflow velocity is 6 BV (24 m). 3 The water is discharged into a pure water storage tank. The ammonia nitrogen content of the effluent is 0.48 mg / L and the conductivity is 0.31 μS / cm.
[0020] Example 3
[0021] The ammonia nitrogen content of the condensate in the original condensate storage tank was 1200 mg / L, and the conductivity was 900 μS / cm. At a rate of 6 BV (28m) per hour... 3 A flow rate of 4 m³ / h is introduced into the primary ammonia nitrogen removal ion exchange column (resin packing volume 4 m³ / h) containing Lanxiao ammonia nitrogen removal resin (brand name LXW-010). 3 Ammonia nitrogen removal is performed at a flow rate of 6 BV (28 m³ / s). 3 The effluent contains 0.98 mg / L of ammonia nitrogen per hour. It is discharged into the primary storage tank after the primary ammonia nitrogen removal process, and then enters the secondary ammonia nitrogen removal ion exchange column at a flow rate of 10 BV. The effluent outlet rate is also 10 BV, and then it is discharged into the secondary storage tank. Finally, it is pumped into a conductivity-reducing ion exchange column packed with a mixed anion and cation exchange resin (resin packing volume 4 m³ / h).3 The liquid velocity was 6 BV (32 m 3 / h) and the effluent was discharged into a pure water tank. The ammonia nitrogen content of the effluent was 0.41 mg / l and the conductivity was 0.43 us / cm.
Claims
1. A system for resource utilization of ammonia-nitrogen-containing high-conductivity condensate water, characterized in that, The application relates to a condensate water storage tank (1) which is connected with a first-stage ammonia-nitrogen ion exchange column (2) through a pipeline, the first-stage ammonia-nitrogen ion exchange column (2) is connected with a first-stage liquid storage tank (3) through a pipeline, the first-stage liquid storage tank (3) is respectively connected with a second-stage ammonia-nitrogen ion exchange column (4) and a low-conductivity ion exchange column (5) through pipelines, the second-stage ammonia-nitrogen ion exchange column (4) is connected with a second-stage liquid storage tank (6) through a pipeline, the second-stage liquid storage tank (6) is connected with the low-conductivity ion exchange column (5) through a pipeline, and the low-conductivity ion exchange column (5) is connected with a pure water storage tank (7) through a pipeline; ammonia-nitrogen online detectors (8) are installed on the condensate water storage tank (1), the first-stage liquid storage tank (3), the second-stage liquid storage tank (6) and the pure water storage tank (7), and the ammonia-nitrogen online detectors (8) installed on the first-stage liquid storage tank (3) are respectively connected with electromagnetic valve interlock controls arranged in front of the second-stage ammonia-nitrogen ion exchange column (4) and the low-conductivity ion exchange column (5); conductivity online detectors (9) are further installed on the condensate water storage tank (1) and the pure water storage tank (7).
2. The system for resource utilization of ammonia-nitrogen-containing high-conductivity condensed water according to claim 1, characterized in that, The first-stage ammonia-nitrogen ion exchange column (2) and the second-stage ammonia-nitrogen ion exchange column (4) are filled with blue-xiao ammonia-nitrogen removal resin with a type number of LXW-010.
3. The system for resource utilization of ammonia-nitrogen-containing high-conductivity condensed water according to claim 1, characterized in that, The low-conductivity ion exchange column (5) is filled with blue-xiao mixed-bed resin with a type number of LX-02.