CN215102606U - Triethyl orthoformate production wastewater treatment system with high ammonia nitrogen content - Google Patents
Triethyl orthoformate production wastewater treatment system with high ammonia nitrogen content Download PDFInfo
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- CN215102606U CN215102606U CN202023177570.8U CN202023177570U CN215102606U CN 215102606 U CN215102606 U CN 215102606U CN 202023177570 U CN202023177570 U CN 202023177570U CN 215102606 U CN215102606 U CN 215102606U
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Abstract
The utility model belongs to the technical field of chemical wastewater treatment, concretely relates to triethyl orthoformate production wastewater treatment system of high ammonia nitrogen content. In the system provided by the utility model, a waste water pipeline is connected with a pretreatment tank, the pretreatment tank is connected with a heat exchanger through a pipeline, an alkali liquor pipeline is arranged between the pretreatment tank and the heat exchanger, and the heat exchanger is connected with a deamination membrane treatment device; the deamination membrane processing device, the filter and the ammonium sulfate circulating tank form a closed loop; the deamination membrane treatment device is also connected with a deamination wastewater post-treatment pipeline, and the outlet of the ammonium sulfate circulating tank is connected with a pipeline leading to a subsequent treatment unit. Compared with the traditional system in which an ammonia stripping tower and an ammonia absorption tower are adopted, the system of the utility model is simpler and more convenient to operate, the system operates in a closed loop, and the treatment process is environment-friendly and tidy; the utility model discloses a system ammonia nitrogen desorption efficiency is higher to nimble controllable, the tolerance of system is strong.
Description
Technical Field
The utility model belongs to the technical field of chemical wastewater treatment, concretely relates to triethyl orthoformate production wastewater treatment system of high ammonia nitrogen content.
Background
The high ammonia nitrogen wastewater in the production of the orthoformic acid triacetic acid has high ammonia nitrogen content and can not be directly discharged, and the ammonia nitrogen in the high ammonia nitrogen wastewater needs to be recycled before being discharged. In the traditional method, the ammonia nitrogen is treated by adopting the following structure:
ammonia nitrogen processing system, its structure is as follows: the waste water pipeline is connected with the pretreatment tank, the pretreatment tank is connected with the heat exchanger through a pipeline, an alkali liquor pipeline is arranged between the pretreatment tank and the heat exchanger, and the heat exchanger is connected with the ammonia stripping tower and the ammonia absorption tower; the ammonia in the wastewater is blown off by the ammonia blow-off tower, so that the ammonia-containing wastewater enters the ammonia absorption tower and is absorbed and recycled. The above structure has the following disadvantages: the ammonia nitrogen removal efficiency is low, the removal rate is low, and the occupied area of the equipment is large.
Therefore, improvement needs to be made in view of the defects, and a triethyl orthoformate production wastewater treatment system with high ammonia nitrogen content is invented.
Disclosure of Invention
In order to solve the technical problem, the utility model provides a triethyl orthoformate production wastewater treatment system with high ammonia nitrogen content, which has the advantages of high ammonia nitrogen removal efficiency, small occupied area and strong tolerance.
The utility model discloses a new system is connected the heat exchanger with deamination membrane processing apparatus, makes the nitrogen molecule among the high ammonia nitrogen waste water in the production of ammonia nitrogen waste water especially the original formic acid triacetic acid permeate through deamination membrane processing apparatus, is absorbed by sulphuric acid and turns into the ammonium sulfate, then gets into subsequent processing to reach the purpose of handling ammonia nitrogen waste water, its ammonia nitrogen desorption efficiency is higher.
The utility model provides a triethyl orthoformate production wastewater treatment system with high ammonia nitrogen content, which is particularly suitable for treating high ammonia nitrogen wastewater in the production of triacetic orthoformate.
The utility model provides a triethyl orthoformate production wastewater treatment system with high ammonia nitrogen content, its specific structure is as follows:
the waste water pipeline is connected with the pretreatment tank, the pretreatment tank is connected with the heat exchanger through a pipeline, an alkali liquor pipeline is arranged between the pretreatment tank and the heat exchanger, and the heat exchanger is connected with the deamination membrane treatment device; the deamination membrane processing device, the filter and the ammonium sulfate circulating tank form a closed loop; the deamination membrane treatment device is also connected with a deamination wastewater post-treatment pipeline, and the outlet of the ammonium sulfate circulating tank is connected with a pipeline leading to a subsequent treatment unit.
The type of the heat exchanger is preferably: 316L plate heat exchanger with 2m specification2。
Preferably, the filter is a first safety filter, and a commercially available safety filter is only required; a second security filter is also arranged between the pretreatment tank and the heat exchanger, so that insoluble impurities or particles in the wastewater can be filtered, and the pipeline blockage or the blockage of the hollow fiber membrane caused by the subsequent treatment can be avoided.
Preferably, the first security filter and the second security filter are both PVC filters with a pore size of 1 μm and a flux of 8m3/h。
Flowmeters are arranged on the wastewater pipeline, the deamination wastewater post-treatment pipeline and the pipeline connected with the ammonium sulfate circulating tank so as to measure the flow of the wastewater; the flow meters are preferably electromagnetic flow meters;
deamination membrane processing apparatus is close with ordinary membrane processing apparatus structure mutually, and its difference lies in, the utility model provides a deamination membrane processing apparatus has the hollow fiber membrane but not the hydrophobic membrane in.
The deamination membrane processing device is internally provided with a back washing component which can automatically wash the hollow fiber membrane.
Preferably, a diaphragm type metering pump is arranged in front of the alkali liquor pipeline;
compared with the traditional system in which an ammonia stripping tower and an ammonia absorption tower are adopted, the system is simpler and more convenient to operate, the system operates in a closed loop mode, and the treatment process is environment-friendly and tidy;
one side of the ammonium sulfate circulating tank is provided with a sulfuric acid inlet which is connected with a sulfuric acid pipeline;
the utility model discloses in the deamination membrane processing apparatus who adopts, the membrane that its inside set up is the hollow fiber membrane, compares with traditional high-pressure osmotic membrane, and both theory of operation are different, the utility model discloses in make the ammonia nitrogen in the high ammonia nitrogen waste water pass through the membrane and turn into ammonium sulfate, and traditional high-pressure osmotic membrane is that the separation of ammonia nitrogen is on the membrane, reach concentrated purpose, and its ammonia nitrogen desorption efficiency is not high, and cause the membrane to block up easily, consequently, the system ammonia nitrogen desorption efficiency that adopts in the utility model is higher, and nimble controllable, and the tolerance of system is strong;
furthermore, the utility model discloses in need not adopt high-power equipment such as air-blower, the energy consumption is low.
Drawings
FIG. 1 is a treatment system for triethyl orthoformate production wastewater with high ammonia nitrogen content before improvement;
FIG. 2 is a system for treating triethyl orthoformate production wastewater with high ammonia nitrogen content in example 1 of the present invention;
FIG. 3 is a system for treating triethyl orthoformate production wastewater with high ammonia nitrogen content, which is disclosed by the embodiment 2 of the utility model;
in the figure, 1-a pretreatment tank, 2-an alkali liquor pipeline, 3-a heat exchanger, 4-a deamination membrane treatment device, 5-a first security filter, 6-an ammonium sulfate circulating tank, 7-a wastewater pipeline, 8-an ammonia stripping tower, 9-an ammonia absorption tower, 10-a deamination wastewater post-treatment pipeline and 11-a second security filter.
Detailed Description
The present invention will now be further described with reference to specific embodiments in order to enable those skilled in the art to better understand the present invention.
Example 1
The utility model provides a triethyl orthoformate production wastewater treatment system with high ammonia nitrogen content, which has the following structure: the waste water pipeline 7 is connected with the pretreatment tank 1, the pretreatment tank 1 is connected with the heat exchanger 3 through a pipeline, an alkali liquor pipeline 2 is arranged between the pretreatment tank 1 and the heat exchanger 3, and the heat exchanger 3 is connected with the deamination membrane treatment device 4; the deamination membrane processing device 4, a first safety filter 5 and an ammonium sulfate circulating tank 6 form a closed loop; the deamination membrane treatment device 4 is also connected with a deamination wastewater post-treatment pipeline 10, and the outlet of the ammonium sulfate circulation tank 6 is connected with a pipeline leading to a subsequent treatment unit. The first security filter 5 and the second security filter 11 are made of PVC material and have a pore size of 1 μm and a flux of 8m3/h。
The deamination membrane treatment device 4 is internally provided with a hollow fiber membrane, which is specifically a deamination membrane, and is not a hydrophobic membrane but a membrane capable of allowing ammonia nitrogen molecules to permeate.
A back washing component is arranged in the deamination membrane processing device 4.
The type of the heat exchanger is as follows: 316L plate heat exchanger with 2m specification2。
And flowmeters are arranged on the pipelines connected with the wastewater pipeline 7, the deamination wastewater post-treatment pipeline 10 and the ammonium sulfate circulating tank 6, and are all electromagnetic flowmeters.
A diaphragm metering pump is arranged in front of the alkali liquor pipeline 2 and is used for conveying and metering the alkali liquor. A connecting rod floating bridge liquid level switch is arranged in the ammonium sulfate circulating groove 6.
The utility model discloses a system is at the during operation, its theory of operation as follows:
the high ammonia nitrogen wastewater enters a pretreatment tank 1 for pretreatment, and then is conveyed to a heat exchanger 3 through a pipeline, in the process, the wastewater is mixed with alkali liquor in an alkali liquor pipeline 2, the mixture is subjected to heat exchange treatment in the heat exchanger 3, and then enters a deamination membrane treatment device 4, at the moment, sulfuric acid in an ammonium sulfate circulation tank 6 passes through a first security filter 5, and then enters the deamination membrane treatment device 4, at the moment, ammonia nitrogen molecules are directly absorbed by the sulfuric acid after being treated by a hollow fiber membrane, and are converted into ammonium sulfate, and the ammonium sulfate enters an ammonium sulfate circulation tank 6 and then goes to a subsequent treatment section; thereby completing the removal of ammonia nitrogen from the wastewater.
In the utility model, the system is adopted, so that a stripping tower and an ammonia absorption tower are not needed, the floor area of the equipment is greatly saved, and the disassembly, the assembly and the expansion are flexible and convenient; just the utility model discloses a system compares ammonia nitrogen desorption efficiently with traditional water-blocking membrane high pressure osmotic membrane, and the desorption rate is nimble controllable, and system's tolerance is strong.
Furthermore, the system of the utility model is compared with other types of nitrogen ammonia wastewater treatment systems, and the purpose of separating ammonia nitrogen molecules is achieved through infiltration under the normal pressure, and the energy consumption is saved without adopting a vacuum pressurization mode. Furthermore, the utility model discloses a system collection deamination, absorption function in an organic whole, easy operation is convenient, the closed loop operation of system, and the processing procedure environmental protection, cleanness.
Example 2
The utility model provides a triethyl orthoformate production wastewater treatment system with high ammonia nitrogen content, which has the following structure: the waste water pipeline 7 is connected with the pretreatment tank 1, the pretreatment tank 1 is connected with the heat exchanger 3 through a pipeline, an alkali liquor pipeline 2 is arranged between the pretreatment tank 1 and the heat exchanger 3, and the heat exchanger 3 is connected with the deamination membrane treatment device 4; the deamination membrane processing device 4, a first safety filter 5 and an ammonium sulfate circulating tank 6 form a closed loop; the deamination membrane treatment device 4 is also connected with a deamination wastewater post-treatment pipeline 10, and the outlet of the ammonium sulfate circulation tank 6 is connected with a pipeline leading to a subsequent treatment unit. A second security filter 11 is also arranged between the pretreatment tank 1 and the heat exchanger 3, so as to filter out insoluble impurities or particles in the wastewater and avoid pipeline blockage or blockage of hollow fiber membranes caused by subsequent treatment. The first and second safety filters 5 and 11 are each PVA filter of C material with a pore size of 1 μm and a flux of 8m3/h。
The deamination membrane treatment device 4 is internally provided with a hollow fiber membrane, which is specifically a deamination membrane, and is not a hydrophobic membrane but a membrane capable of allowing ammonia nitrogen molecules to permeate.
A back washing component is arranged in the deamination membrane processing device 4.
The type of the heat exchanger is as follows: 316L plate heat exchanger with 2m specification2。
And flowmeters are arranged on the pipelines connected with the wastewater pipeline 7, the deamination wastewater post-treatment pipeline 10 and the ammonium sulfate circulating tank 6, and are all electromagnetic flowmeters.
A diaphragm metering pump is arranged in front of the alkali liquor pipeline 2 and is used for conveying and metering the alkali liquor. A connecting rod floating bridge liquid level switch is arranged in the ammonium sulfate circulating groove 6.
Claims (10)
1. The triethyl orthoformate production wastewater treatment system with high ammonia nitrogen content is characterized in that a wastewater pipeline (7) is connected with a pretreatment tank (1), the pretreatment tank (1) is connected with a heat exchanger (3) through a pipeline, an alkali liquor pipeline (2) is arranged between the pretreatment tank (1) and the heat exchanger (3), and the heat exchanger (3) is connected with a deamination membrane treatment device (4); the deamination membrane processing device (4), a filter and an ammonium sulfate circulating tank (6) form a closed loop; the deamination membrane treatment device (4) is also connected with a deamination wastewater post-treatment pipeline (10), and the outlet of the ammonium sulfate circulating tank (6) is connected with a pipeline leading to a subsequent treatment unit.
2. The system for treating the triethyl orthoformate production wastewater with high ammonia nitrogen content as recited in claim 1, wherein the filter is a first safety filter (5).
3. The treatment system for the triethyl orthoformate production wastewater with high ammonia nitrogen content as recited in claim 2, wherein the deamination membrane treatment device (4) is internally provided with a hollow fiber membrane.
4. The treatment system for the triethyl orthoformate production wastewater with high ammonia nitrogen content as recited in claim 3, wherein the deamination membrane treatment device (4) is internally provided with a back washing component.
5. The treatment system for the triethyl orthoformate production wastewater with high ammonia nitrogen content as claimed in claim 4, wherein a second security filter (11) is also arranged between the pretreatment tank (1) and the heat exchanger (3).
6. The system for treating the triethyl orthoformate production wastewater with high ammonia nitrogen content as recited in claim 5, wherein the heat exchanger is of the type: 316L plate heat exchanger with 2m specification2。
7. The treatment system for the triethyl orthoformate production wastewater with high ammonia nitrogen content as claimed in claim 5, wherein the first safety filter (5) and the second safety filter (11) are both made of PVC material, the pore size is 1 μm, and the flux is 8m3/h。
8. The triethyl orthoformate production wastewater treatment system with high ammonia nitrogen content as defined in claim 1 wherein flow meters are disposed on the wastewater pipeline (7), the deamination wastewater post-treatment pipeline (10) and the pipeline connected with the ammonium sulfate circulating tank (6).
9. The system for treating the triethyl orthoformate production wastewater with high ammonia nitrogen content as recited in claim 8, wherein the flow meters are all electromagnetic flow meters.
10. The system for treating the triethyl orthoformate production wastewater with high ammonia nitrogen content as recited in claim 8, wherein a diaphragm metering pump is installed in front of the alkali liquor pipeline (2).
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| Application Number | Priority Date | Filing Date | Title |
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| CN202023177570.8U CN215102606U (en) | 2020-12-25 | 2020-12-25 | Triethyl orthoformate production wastewater treatment system with high ammonia nitrogen content |
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| CN202023177570.8U CN215102606U (en) | 2020-12-25 | 2020-12-25 | Triethyl orthoformate production wastewater treatment system with high ammonia nitrogen content |
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| CN215102606U true CN215102606U (en) | 2021-12-10 |
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| CN202023177570.8U Active CN215102606U (en) | 2020-12-25 | 2020-12-25 | Triethyl orthoformate production wastewater treatment system with high ammonia nitrogen content |
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