CN216472683U - Process system for recycling high ammonia nitrogen wastewater - Google Patents
Process system for recycling high ammonia nitrogen wastewater Download PDFInfo
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- CN216472683U CN216472683U CN202122981616.XU CN202122981616U CN216472683U CN 216472683 U CN216472683 U CN 216472683U CN 202122981616 U CN202122981616 U CN 202122981616U CN 216472683 U CN216472683 U CN 216472683U
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Abstract
The utility model provides a process system for recycling high ammonia nitrogen wastewater, which comprises the following steps: the waste liquid storage tank device comprises a first waste liquid storage tank and a second waste liquid storage tank, wherein the first waste liquid storage tank is used for containing waste nitric acid waste liquid, and the second waste liquid storage tank is used for containing ammonia nitrogen waste liquid; the reaction device comprises a first reaction tank and a second reaction tank, the first reaction tank is connected with the second reaction tank, and the first waste liquid storage tank and the second waste liquid storage tank are respectively communicated with the first reaction tank; the filter press is connected with the second reaction tank; the low-temperature evaporator is connected with the filter press; the crystallization kettle and the crystallizer are connected with the low-temperature evaporator. The utility model has the characteristics of convenient operation, high treatment efficiency and capability of carrying out centralized and unified treatment on the waste nitric acid and ammonia nitrogen wastewater.
Description
Technical Field
The utility model belongs to the technical field of chemical production, and relates to a process system for recycling high ammonia nitrogen wastewater.
Background
The waste nitric acid waste liquid is generated by using a large amount of acid liquid in the preparation and cleaning processes of products in the electronic and photoelectric industries, and the acid liquid needs to be treated and then discharged in order to avoid the damage to the environment. In the prior art, the treatment of waste nitric acid is generally carried out by decomposing nitrogen fixation with microorganisms (for example, anaerobic bacteria). However, the slow rate of decomposition by microorganisms is often accompanied by the production of large amounts of biological sludge, requiring large storage space and associated cleaning costs. The treatment of ammonia nitrogen pollutants is urgent. The direct discharge of ammonia nitrogen wastewater can cause water eutrophication, which leads to water environment deterioration and threatens human health. In addition, in the industrial recycling process, the reclaimed water containing ammonia nitrogen is corrosive to some metals, and is easy to form biological scale to block pipelines and water using equipment. In the prior art, the treatment of waste nitric acid waste liquid and ammonia nitrogen waste water has important significance in water environment and industrial production.
The waste nitric acid and ammonia nitrogen wastewater is waste liquid in the surface treatment industry and the chip industry, has high concentration and complex physicochemical treatment of high ammonia nitrogen wastewater, is easy to cause the overproof of total nitrogen and ammonia nitrogen in the wastewater by directly adopting a physicochemical process, and has no mode of comprehensively treating the two types of wastewater in the prior art.
In conclusion, in order to solve the defects in the prior art, the utility model designs a high ammonia nitrogen wastewater recycling treatment process system for synthesizing ammonium nitrate based on the chemical property that the two types of wastewater are soluble salts, and then adds magnesium oxide with lower cost for neutralization reaction, wherein the treatment process system is convenient to operate and high in treatment efficiency.
Disclosure of Invention
The utility model provides a process system for recycling high ammonia nitrogen wastewater, which is convenient to operate and can be used for recycling phosphoric acid in phosphoric acid to solve the problems in the prior art.
The purpose of the utility model can be realized by the following technical scheme:
high ammonia nitrogen waste water resourceful treatment's process systems includes:
the waste liquid storage tank device comprises a first waste liquid storage tank and a second waste liquid storage tank, wherein the first waste liquid storage tank is used for containing waste nitric acid waste liquid, and the second waste liquid storage tank is used for containing ammonia nitrogen waste liquid;
the reaction device comprises a first reaction tank and a second reaction tank, the first reaction tank is connected with the second reaction tank, and the first waste liquid storage tank and the second waste liquid storage tank are respectively communicated with the first reaction tank;
the filter press is connected with the second reaction tank;
the low-temperature evaporator is connected with the filter press;
the crystallization kettle and the crystallizer are connected with the low-temperature evaporator.
As a further improvement of the scheme, the crystallization kettle is also connected with a centrifuge;
as a further improvement of the scheme, the centrifugal centrifuge further comprises a third reaction tank, and the third reaction tank is communicated with the centrifugal machine through a first pipeline.
As a further improvement of the scheme, the third reaction tank is also communicated with the low-temperature evaporator through a second pipeline.
As a further improvement of the scheme, the low-temperature evaporator comprises an evaporation concentration tank and a heater, and the evaporation concentration tank is higher than the heater.
Compared with the prior art, the system has reasonable structural design, and can realize continuous production; part of dangerous waste can be recycled; the low-temperature evaporation adopts a multi-effect waste heat steam utilization mode, so that the energy is greatly saved and the consumption is greatly reduced. The high ammonia nitrogen wastewater recycling treatment process system for synthesizing ammonium nitrate firstly, and then adding magnesium oxide with lower cost for neutralization reaction, and the treatment process system is convenient to operate and high in treatment efficiency.
Drawings
Fig. 1 is a schematic structural view of the present invention.
Fig. 2 is a schematic structural diagram of the triple-effect evaporation device of the utility model.
Detailed Description
The technical solution of the present invention is further described below with reference to the following embodiments and the accompanying drawings.
As shown in figure 1 of the drawings, in which,
example 1
This high ammonia nitrogen wastewater resourceful treatment's process systems includes:
the waste liquid storage tank device 10 comprises a waste liquid storage tank I11 and a waste liquid storage tank II 12, wherein the waste liquid storage tank I11 is used for containing waste nitric acid waste liquid, and the waste liquid storage tank II 12 is used for containing ammonia nitrogen waste liquid;
the reaction device 20 comprises a first reaction tank 21 and a second reaction tank 22, the first reaction tank 21 is connected with the second reaction tank 22, and the first waste liquid storage tank 11 and the second waste liquid storage tank 12 are respectively communicated with the first reaction tank 21;
the filter press 30 is connected with the second reaction tank 22;
the low-temperature evaporator 40, the low-temperature evaporator 40 couples to filter press 30;
the crystallization kettle 50 and the crystallizer 50 are connected with the low-temperature evaporator 40.
The waste nitric acid and ammonia nitrogen wastewater is waste liquid in the surface treatment industry and the chip industry, has high concentration and complex physicochemical treatment of high ammonia nitrogen wastewater, is easy to cause the overproof of total nitrogen and ammonia nitrogen in the wastewater by directly adopting a physicochemical process, and has no mode of comprehensively treating the two types of wastewater in the prior art.
Therefore, the utility model designs a high ammonia nitrogen wastewater recycling treatment process system for synthesizing ammonium nitrate based on the chemical property that the two types of wastewater are soluble salts, and then adds magnesium oxide with lower cost for neutralization reaction.
The process system for recycling the high ammonia nitrogen wastewater comprises the following comprehensive treatment processes of the waste nitric acid and ammonia nitrogen wastewater:
step 1) filtration and impurity removal
Respectively carrying out coarse filtration and impurity removal on waste nitric acid and ammonia nitrogen wastewater in a waste liquid storage tank I11 and a waste liquid storage tank II 12, and respectively detecting the content of nitrate and ammonia in the mixed solution;
step 2) adding magnesium oxide
Introducing waste nitric acid and ammonia nitrogen wastewater into a first reaction tank 21, mixing the two waste liquids, adding magnesium oxide according to the molar ratio of magnesium ammonium nitrate, heating to 80-90 ℃, reacting for 1h, and filtering to remove impurities;
step 3) adding ammonia water
And (3) communicating the mixed solution after reaction in the first reaction tank 21 to a second reaction tank 22 through a pipeline, adding ammonia water with a theoretical molar ratio (nitrate nitrogen, water-soluble magnesium and ammonium nitrogen being 11: 5: 1), stirring and reacting in the second reaction tank 22 for 1 hour, and filtering to obtain a filtrate.
The chemical reaction that takes place in this step is: NH (NH)4 ++11NO3 -+5Mg2++10H20＝5Mg(NO3)2·NH4NO3·10H2O
Step 4) treatment of the filtrate
And evaporating and concentrating the filtrate through a low-temperature evaporator 40, then pumping the filtrate into a crystallization kettle 50 for cooling and crystallization, treating the filtrate through a de-molding machine 60, detecting the content of the product, and packaging the product magnesium ammonium nitrate to obtain a qualified product.
Example 2
As a further preferred embodiment, the crystallization vessel 50 is also connected to a centrifuge 60;
as a further preferred embodiment, the reaction tank III 23 is further included, and the reaction tank III 23 is communicated with the centrifuge through a pipeline I231.
As a further preferred embodiment, the third reaction tank 23 is also communicated with the low-temperature evaporator 40 through a second pipeline 232.
In this embodiment, high ammonia nitrogen waste water resourceful treatment's process systems includes:
the waste liquid storage tank device 10 comprises a waste liquid storage tank I11 and a waste liquid storage tank II 12, wherein the waste liquid storage tank I11 is used for containing waste nitric acid waste liquid, and the waste liquid storage tank II 12 is used for containing ammonia nitrogen waste liquid;
the reaction device 20 comprises a first reaction tank 21 and a second reaction tank 22, the first reaction tank 21 is connected with the second reaction tank 22, and the first waste liquid storage tank 11 and the second waste liquid storage tank 12 are respectively communicated with the first reaction tank 21;
the filter press 30 is connected with the second reaction tank 22;
the low-temperature evaporator 40, the low-temperature evaporator 40 couples to filter press 30;
the crystallization kettle 50 and the crystallizer 50 are connected with the low-temperature evaporator 40.
Furthermore, the crystallization kettle 50 in this embodiment is connected to a centrifuge; the reaction tank III 23 is communicated with the centrifuge through a pipeline; the third reaction tank 23 is also communicated with the low-temperature evaporator 40 through a pipeline.
Compared with the embodiment 1, the method is characterized by further comprising the following processing steps:
in example 1, if the solid product is treated by the centrifuge 60, the content of the solid product (nitrogen is more than or equal to 15.5%, nitrate nitrogen is more than or equal to 14.4%, ammonium nitrogen is more than or equal to 1.1%, moisture is less than or equal to 0.6%, calcium carbonate or magnesium carbonate is less than or equal to 2.0%, magnesium is more than or equal to 19%, water-insoluble substances are less than or equal to 0.1%, iron is less than or equal to 0.005%, chlorine is less than or equal to 0.02%, phosphate radical is less than or equal to 0.05%, and the pH value is 6.5-7.5) is detected, and if the content does not reach the control standard, the solid product is dissolved by tap water in the reaction tank three 23, and then the dissolved solution after being dissolved by tap water is introduced into the low-temperature evaporator 40 again through the pipeline two 232 for recrystallization until a qualified ammonium magnesium nitrate product is obtained.
By analogy, third dissolution recrystallization and fourth dissolution recrystallization … … dissolution recrystallization can also be carried out, and then the final crystallized product is detected to obtain the product meeting the detection standard.
As a further preferred embodiment, the low temperature evaporator 40 includes an evaporation and concentration tank 41 and a heater 42, and the evaporation and concentration tank 40 is higher than the heater 42.
In the present embodiment, the evaporation concentration tank 41 is higher than the heater 42 so that the coolant can smoothly flow into the next stage heater 42.
The waste nitric acid and ammonia nitrogen wastewater related to the process system for recycling the high ammonia nitrogen wastewater is waste liquid in the surface treatment industry and the chip industry, the concentration is high, the physicochemical treatment of the high ammonia nitrogen wastewater is complex, the waste liquid is firstly synthesized into ammonium nitrate, then magnesium oxide with low cost is added for neutralization reaction, the mixture is uniformly mixed according to a certain proportion (the proportion of ammonia: water-soluble magnesium: total nitrogen is 14:6:13 (mass ratio)), and then the mixture enters triple effect evaporation for evaporation concentration, when the specific gravity of the solution reaches 1.40-1.55, the solution is put into a crystallization kettle, a proper amount of seed crystal is added according to the requirement, crystals are separated after cooling crystallization, the mother liquid returns to a low temperature evaporator 40, and the low temperature evaporator 40 is a triple effect evaporator. The high ammonia nitrogen wastewater recycling treatment process system for synthesizing ammonium nitrate firstly, and then adding magnesium oxide with lower cost for neutralization reaction, wherein the treatment process system is convenient to operate and high in treatment efficiency.
What has been described herein is merely a preferred embodiment of the utility model, and the scope of the utility model is not limited thereto. Modifications, additions, or substitutions by those skilled in the art to the specific embodiments described herein are intended to be within the scope of the utility model.
Claims (5)
1. High ammonia nitrogen waste water resourceful treatment's process systems, its characterized in that includes:
the waste liquid storage tank device comprises a first waste liquid storage tank and a second waste liquid storage tank, wherein the first waste liquid storage tank is used for containing waste nitric acid waste liquid, and the second waste liquid storage tank is used for containing ammonia nitrogen waste liquid;
the reaction device comprises a first reaction tank and a second reaction tank, the first reaction tank is connected with the second reaction tank, and the first waste liquid storage tank and the second waste liquid storage tank are respectively communicated with the first reaction tank;
the filter press is connected with the second reaction tank;
the low-temperature evaporator is connected with the filter press;
the crystallization kettle and the crystallizer are connected with the low-temperature evaporator.
2. The process system for recycling high ammonia nitrogen wastewater as set forth in claim 1, wherein the crystallization kettle is further connected with a centrifuge.
3. The process system for recycling high ammonia nitrogen wastewater according to claim 1, further comprising a third reaction tank, wherein the third reaction tank is communicated with the centrifuge through a first pipeline.
4. The process system for recycling high ammonia nitrogen wastewater according to claim 1, wherein the third reaction tank is further communicated with the low-temperature evaporator through a second pipeline.
5. The process system for recycling high ammonia nitrogen wastewater as set forth in claim 1, wherein the low temperature evaporator comprises an evaporation and concentration tank and a heater, the evaporation and concentration tank is higher than the heater.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122981616.XU CN216472683U (en) | 2021-11-30 | 2021-11-30 | Process system for recycling high ammonia nitrogen wastewater |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202122981616.XU CN216472683U (en) | 2021-11-30 | 2021-11-30 | Process system for recycling high ammonia nitrogen wastewater |
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| CN216472683U true CN216472683U (en) | 2022-05-10 |
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| CN202122981616.XU Active CN216472683U (en) | 2021-11-30 | 2021-11-30 | Process system for recycling high ammonia nitrogen wastewater |
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- 2021-11-30 CN CN202122981616.XU patent/CN216472683U/en active Active
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