CN212954706U - High ammonia nitrogen wastewater treatment device based on parallel flat plate type membrane distillation technology - Google Patents
High ammonia nitrogen wastewater treatment device based on parallel flat plate type membrane distillation technology Download PDFInfo
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- CN212954706U CN212954706U CN202021499084.5U CN202021499084U CN212954706U CN 212954706 U CN212954706 U CN 212954706U CN 202021499084 U CN202021499084 U CN 202021499084U CN 212954706 U CN212954706 U CN 212954706U
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Abstract
The utility model discloses a high ammonia nitrogen wastewater treatment device based on a parallel flat plate type membrane distillation technology, which comprises a membrane distillation unit between a solar heating unit and a permeable phase absorption unit; the solar heating unit comprises a light-gathering groove type solar heat collector, a raw material liquid inlet tank and a copper heat exchange coil, wherein the copper heat exchange coil is arranged in the raw material liquid inlet tank, and two ends of the light-gathering groove type solar heat collector are connected with two ends of the copper heat exchange coil; the osmotic phase absorption unit comprises an absorption liquid collecting tank, a semiconductor refrigerating sheet and a temperature sensor, wherein the semiconductor refrigerating sheet is arranged on the outer wall of the absorption liquid collecting tank, and the temperature sensor is arranged in the absorption liquid collecting tank; the membrane distillation unit includes parallelly connected flat membrane module, and parallelly connected flat membrane module includes the membrane module as the hot chamber and the membrane module as the cold chamber that a plurality of intervals set up, the utility model discloses ammonia nitrogen wastewater treatment is realized to the high efficiency, can also realize the recycle of ammonia nitrogen through the method of retrieving the osmotic phase.
Description
Technical Field
The utility model relates to a wastewater treatment device, in particular to a high ammonia nitrogen wastewater treatment device and a method.
Background
The basic principle of treating ammonia nitrogen wastewater by a Membrane Distillation (MD) process is as follows: adjusting the pH value of the raw water to be high (the experiment shows that when the pH value of the raw water is about 12, the ammonia nitrogen removal rate is highest), so that the ammonia nitrogen is in a volatile NH state3The PVDF hydrophobic porous membrane is prepared by the following steps that a raw water solution flows through one side of the PVDF hydrophobic porous membrane, the solution cannot enter membrane pores due to the low surface tension ratio of the hydrophobic membrane, a solution-steam interface is formed at the membrane pores, and volatile NH is generated3Where it evaporates and then passes through the membrane pores by diffusion, convection, to the permeate phase and finally is removed from the module as an absorption liquid or gas, thus effecting separation.
The device is based on a solar photo-thermal-photoelectric system, and the operation of the device is realized by only utilizing solar energy. The solar photo-thermal system adopts a light-gathering groove type solar heat-collecting system, and utilizes light-gathering devices such as reflection devices and transmission devices to gather and project sunlight with low energy flow density to a receiver with a small area and convert the sunlight into heat, so that higher temperature is obtained, the heat loss of the system is reduced, the heat efficiency is improved, the overall performance of the solar membrane distillation system can be improved, and the solar liquid used by indirect heating has the characteristics of frost resistance, good heat exchange effect and the like. The solar energy photoelectric system consists of a solar cell panel, a solar charging controller and a storage battery, and the photovoltaic power generation is based on the principle of photovoltaic effect and utilizes a solar cell to directly convert solar energy into electric energy. The photovoltaic power generation equipment mainly comprises electronic components, does not relate to mechanical parts, and is extremely refined, reliable and stable, long in service life and simple and convenient to install and maintain.
Ammonia nitrogen wastewater treatment is a research hotspot in the field of water treatment at present, high-concentration ammonia nitrogen wastewater widely exists in various modern industrial productions, and is treated by adopting a physical and chemical method due to strong biological toxicity. At present, the main methods for treating high-concentration ammonia nitrogen wastewater are a stripping method, an adsorption method, a chemical precipitation method, a reverse osmosis method and the like. The membrane technology is an important direction in the research of water treatment field, and wherein the membrane distillation technology has very big advantage in the aspect of the volatile materials in the separation aqueous solution, the utility model discloses develop and use the light energy to realize the membrane distillation plant who handles high ammonia nitrogen waste water as drive power.
SUMMERY OF THE UTILITY MODEL
The utility model aims at providing a high ammonia-nitrogen wastewater treatment device based on parallel flat membrane distillation technique when realizing ammonia-nitrogen wastewater treatment, because ammonia nitrogen concentration is enriched in the osmotic phase absorption liquid, so can also be through struvite precipitation method (wherein add and contain MgCl2The solution forms struvite sediment as a fertilizer) to realize the recycling of ammonia nitrogen, and has higher economic benefit.
The purpose of the utility model is realized like this: a high ammonia nitrogen wastewater treatment device based on a parallel flat plate type membrane distillation technology comprises a membrane distillation unit arranged between a solar heating unit and a permeable phase absorption unit, and a solar photovoltaic power generation unit is arranged below the membrane distillation unit;
the solar heating unit comprises a light-gathering type groove solar heat collector, a raw material liquid inlet tank and a copper heat exchange coil, wherein the copper heat exchange coil is arranged in the raw material liquid inlet tank and used for carrying out heat exchange with raw material liquid in the raw material liquid inlet tank;
the osmotic phase absorption unit comprises an absorption liquid collecting tank, a semiconductor refrigeration piece and a temperature sensor, wherein the semiconductor refrigeration piece is installed on the outer wall of the absorption liquid collecting tank and used as a cold source for refrigerating the absorption liquid collecting tank, and the temperature sensor is arranged in the absorption liquid collecting tank and used for monitoring the temperature in the absorption liquid collecting tank and maintaining the temperature of absorption liquid in the absorption liquid collecting tank by matching with the semiconductor refrigeration piece;
the membrane distillation unit comprises parallel flat plate type membrane assemblies, each parallel flat plate type membrane assembly comprises a plurality of membrane assemblies serving as hot cavities and a plurality of membrane assemblies serving as cold cavities, the membrane assemblies serving as the hot cavities are connected in parallel at two ends respectively and then are connected at two ends of an inlet and an outlet of a raw material liquid inlet tank to form a loop, the membrane assemblies serving as the cold cavities are connected in parallel at two ends respectively and then are connected at two ends of an inlet and an outlet of a permeable phase absorption unit to form a loop, inlets of the parallel flat plate type membrane assemblies are arranged below, and outlets of the;
the solar photovoltaic power generation unit comprises a solar cell panel, a solar charging controller and a storage battery, wherein the solar cell panel is connected with the solar charging controller in series through an electric lead, the solar charging controller is used for converting direct current into alternating current, the solar charging controller is connected with the solar storage battery in series through an electric lead, and the storage battery is used as a power supply to supply power for the solar heating unit, the osmotic phase absorption unit and the power utilization unit in the membrane distillation unit.
As a further limitation of the present invention, the solar heating unit further comprises:
the solar heating circulating magnetic pump is arranged between the outlet of the copper heat exchange coil and the inlet of the light-gathering groove type solar heat collector;
the self-operated temperature regulating valve is arranged between the solar heating circulating magnetic pump and the copper heat exchange coil and is used for controlling the heating temperature of the copper heat exchange coil to be maintained at 60-80 ℃;
the pH real-time monitor is arranged in the feed liquid inlet tank and is used for monitoring the pH value of the feed liquid in real time;
the portable ammonia nitrogen monitor is arranged in the feed liquid inlet tank and used for monitoring the ammonia nitrogen value of the feed liquid in real time.
As a further limitation of the present invention, the membrane distillation unit further comprises: the system comprises a hot side circulating magnetic pump, a cold side circulating magnetic pump, a hot side rotor flow meter, a cold side rotor flow meter and a temperature monitor; the hot side circulating magnetic pump and the hot side rotor flowmeter are connected in series between an outlet of a raw material liquid inlet tank and an inlet of a hot cavity membrane assembly, the cold side circulating magnetic pump and the cold side rotor flowmeter are connected in series between an outlet of an absorption liquid collecting tank and an inlet of the cold cavity membrane assembly, and a plurality of temperature monitoring meters are arranged at the inlet and the outlet of the parallel flat plate type membrane assembly respectively.
Compared with the prior art, the beneficial effects of the utility model reside in that:
1. the device can realize the treatment of ammonia nitrogen wastewater, and simultaneously can also realize the enrichment of ammonia nitrogen concentration in the osmotic phase absorption liquid by a struvite precipitation method (MgCl is added in the struvite precipitation method)2The solution of (1) forms struvite sediment as a fertilizer) to realize the recycling of ammonia nitrogen, thereby having higher economic benefit;
2. in the treatment process of the device, other energy sources except solar energy are not consumed, so that the device is clean and environment-friendly, and the power cost is saved;
3. the device is basically automated in the treatment process, is convenient and quick, and saves the labor cost;
4. the device adopts a parallel flat plate type membrane distillation technology, parameter conditions for obtaining the highest membrane flux are determined through experiments, and the membrane material has certain anti-fouling performance and relatively longer service life.
Drawings
FIG. 1 is a schematic diagram of the high ammonia nitrogen wastewater treatment device of the utility model.
The system comprises a solar heating unit 1, a membrane distillation unit 2, a cold distilled water outlet unit 3, a solar photovoltaic power generation unit 4, a light-gathering type groove solar heat collector 5, a solar heating circulating magnetic pump 6, a self-operated temperature regulating valve 7, a real-time pH monitor 8, a copper heat exchange coil 9, a raw material liquid inlet tank 10, a portable ammonia nitrogen monitor 11, a hot side circulating magnetic pump 12, a hot side rotor flow meter 13, a parallel flat plate type membrane assembly 14, a temperature monitor 15, a cold side rotor flow meter 16, a cold side circulating magnetic pump 17, an absorption liquid collecting tank 18, a temperature sensor 19, a semiconductor chip 20, a circuit switch 21, a solar cell panel array 22, a solar charging controller 23 and a storage battery 24.
Detailed Description
The present invention will be further described with reference to the following specific embodiments.
The high ammonia nitrogen wastewater treatment device based on the parallel flat-plate membrane distillation technology shown in figure 1 comprises four units, namely a solar heating unit 1, a membrane distillation unit 2, a permeable phase absorption unit 3 and a solar photovoltaic power generation unit 4. The solar heating unit 1 is arranged on the left, the osmotic phase absorption unit 3 is arranged on the right, the membrane distillation unit 2 is arranged between the two, and the solar photovoltaic power generation unit 4 is arranged below.
The solar heating unit comprises a light-gathering groove type solar heat collector 5, a raw material liquid inlet tank 10, a self-operated temperature regulating valve 7, a solar heating circulating magnetic pump 6, a pH real-time monitor 8, a copper heat exchange coil 9 and a portable ammonia nitrogen monitor 11; the water outlet of the light-gathering type groove type solar thermal collector 5 is connected with a copper heat exchange coil pipe 9 in a raw material liquid inlet tank 10 through a thermoplastic polyurethane elastomer rubber (TPU) pipe, solar liquid with a good heat exchange effect is filled in the copper heat exchange coil pipe 9, the copper heat exchange coil pipe 9 is connected with a self-operated temperature regulating valve 7 through a TPU pipe, the self-operated temperature regulating valve 7 is connected with a solar heating circulation magnetic pump 6 through a TPU pipe, and the solar heating circulation magnetic pump 6 is connected with the water inlet of the light-gathering type groove type solar thermal collector 5 through a TPU pipe; the elements are mutually connected through a pipeline to form a solar heating circulation loop, and the heating temperature is controlled to be 60-80 ℃ through a self-operated temperature regulating valve 7; an MIK-pH2.0 type pH real-time monitor 8 and an AD-2AZ type portable ammonia nitrogen monitor 11 are arranged in the raw material liquid inlet tank 10 and used for monitoring the pH and ammonia nitrogen in the raw material liquid inlet tank 10.
The membrane distillation unit comprises a parallel flat plate type membrane assembly 14, a hot side circulating magnetic pump 12, a cold side circulating magnetic pump 17, a hot side rotor flow meter 13, a cold side rotor flow meter 16 and a temperature monitor 15. The water outlet of the raw material liquid inlet tank 10 is connected with a hot-side circulating magnetic pump 12 through a TPU pipe, the hot-side circulating magnetic pump 12 is connected with a hot-side rotor flow meter 13 through the TPU pipe, the hot-side rotor flow meter 13 is connected with a hot-side water inlet of a parallel flat plate type membrane module 14 through the TPU pipe, the hot-side water outlet of the parallel flat plate type membrane module 14 is connected with the water inlet of the raw material liquid inlet tank 10 through the TPU pipe, and the components are mutually connected through a pipeline to form a membrane distillation; the water outlet of the absorption liquid collecting tank 18 is connected with a cold side circulating magnetic pump 17 through a TPU pipe, the cold side circulating magnetic pump 17 is connected with a cold side rotor flow meter 16 through a TPU pipe, the cold side rotor flow meter 16 is connected with a cold side water inlet of the parallel flat plate type membrane assembly 14 through a TPU pipe, the cold side water outlet of the parallel flat plate type membrane assembly 14 is connected with the water inlet of the absorption liquid collecting tank 18 through a TPU pipe, and the components are connected with each other through pipelines to form a membrane distillation cold side circulating loop. A temperature monitor is respectively arranged at a water inlet and a water outlet at the hot side of the parallel flat plate type membrane component 14 of the membrane distillation unit and at the positions of a cold side inlet and a cold side outlet; the parallel flat plate type membrane component 14 is composed of organic glass plates and is fastened by screws and nuts, six membrane components are connected in parallel to form a whole, cold cavities and hot cavities of the membrane components 14 are alternately arranged in sequence, a water inlet and a water outlet of the membrane components 14 are respectively connected in parallel, and a membrane for membrane distillation is a 0.22 mu m polyvinylidene fluoride (PVDF) hydrophobic membrane.
The osmotic phase absorption unit comprises an absorption liquid collecting tank 18, two semiconductor refrigerating sheets 20, a temperature sensor 19 and a circuit switch 21; the two semiconductor refrigeration pieces 20 are arranged on the outer wall of the absorption liquid collecting tank 18, the absorption liquid collecting tank 18 is a stainless steel storage tank and can conduct temperature quickly, a temperature sensor 19 is arranged in the absorption liquid collecting tank 18, the temperature sensor 19 is connected with a circuit switch 21 for controlling the semiconductor refrigeration pieces 20 through a signal wire, and the temperature in the absorption liquid collecting tank is controlled to be between 10 and 20 ℃.
The solar photovoltaic power generation unit comprises a solar cell panel array 22, a solar charging controller 23 and a storage battery 24, wherein four 150W solar cell panels are connected in parallel to form the solar cell panel array 22 with 600W power generation power, the solar cell panel array 22 and the solar charging controller 23 are connected in series through electric leads, the solar charging controller 23 can convert 18V direct current into 220V alternating current, and the solar charging controller is convenient for using electric appliances such as a magnetic pump, the solar charging controller 23 is connected in series with the 24 solar storage battery through electric leads, the solar heating circulating magnetic pump 6, the pH real-time monitor 8, the portable ammonia nitrogen monitor 11, the hot side circulating magnetic pump 12, the cold side circulating magnetic pump 17 and the semiconductor refrigerating sheet 20 are connected in parallel to the storage battery 24.
The utility model discloses a patent application process brief explanation:
first, a membrane for membrane distillation is fixed to the parallel flat-plate type membrane module 14, and six parallel flat-plate type membrane modules 14 are connected in parallel to form a whole. The pH value of the raw material liquid in the liquid inlet tank 10 is adjusted to about 12, hot feed liquid heated to 60 ℃ by a 5-light-gathering groove type vacuum tube solar heat collector is guided into the hot side of the parallel flat plate type membrane component 14 through a hot side circulating magnetic pump 12, and the hot feed liquid flows back to the raw material liquid in the liquid inlet tank 10 after the distillation process. The dilute sulfuric acid solution in the absorption liquid collecting tank 18 is acted by a semiconductor refrigerating sheet 20, the temperature is maintained at about 15 ℃, and then the dilute sulfuric acid solution is led into the cold side of the membrane component 14 through a cold side circulating magnetic pump 17 and then flows back to the absorption liquid collecting tank 18. Operating 14 membrane modules, and using the steam pressure difference generated by the cold and hot temperature difference at the two sides of the membrane as the driving force of mass transfer to enable volatile NH in the raw material liquid at the hot side3Penetrate through the membrane pores and enter the cold-side osmotic phase absorption liquid. The solar energy is converted into electric energy through the solar panel array 22, the electric energy is stored in the storage battery 23, and the solar charging controller 24 is used for regulating the current and the voltage output by the photovoltaic panel. When the device is operated, the required electric appliances are powered by the 23 storage batteries. The portable ammonia nitrogen monitor 11 is arranged outside the raw material liquid inlet tank 10, the ammonia nitrogen concentration of the raw material liquid is monitored, when the ammonia nitrogen removal rate reaches 95%, the treatment process is completed, and the device stops running.
The present invention is not limited to the above embodiments, and based on the technical solutions disclosed in the present invention, those skilled in the art can make some replacements and transformations for some technical features without creative labor according to the disclosed technical contents, and these replacements and transformations are all within the protection scope of the present invention.
Claims (3)
1. A high ammonia nitrogen wastewater treatment device based on a parallel flat plate type membrane distillation technology is characterized by comprising a membrane distillation unit arranged between a solar heating unit and a permeable phase absorption unit, and a solar photovoltaic power generation unit is arranged below the membrane distillation unit;
the solar heating unit comprises a light-gathering type groove solar heat collector, a raw material liquid inlet tank and a copper heat exchange coil, wherein the copper heat exchange coil is arranged in the raw material liquid inlet tank and used for carrying out heat exchange with raw material liquid in the raw material liquid inlet tank;
the osmotic phase absorption unit comprises an absorption liquid collecting tank, a semiconductor refrigeration piece and a temperature sensor, wherein the semiconductor refrigeration piece is installed on the outer wall of the absorption liquid collecting tank and used as a cold source for refrigerating the absorption liquid collecting tank, and the temperature sensor is arranged in the absorption liquid collecting tank and used for monitoring the temperature in the absorption liquid collecting tank and maintaining the temperature of absorption liquid in the absorption liquid collecting tank by matching with the semiconductor refrigeration piece;
the membrane distillation unit comprises parallel flat plate type membrane assemblies, each parallel flat plate type membrane assembly comprises a plurality of membrane assemblies serving as hot cavities and a plurality of membrane assemblies serving as cold cavities, the membrane assemblies serving as the hot cavities are connected in parallel at two ends respectively and then are connected at two ends of an inlet and an outlet of a raw material liquid inlet tank to form a loop, the membrane assemblies serving as the cold cavities are connected in parallel at two ends respectively and then are connected at two ends of an inlet and an outlet of a permeable phase absorption unit to form a loop, inlets of the parallel flat plate type membrane assemblies are arranged below, and outlets of the;
the solar photovoltaic power generation unit comprises a solar cell panel, a solar charging controller and a storage battery, wherein the solar cell panel is connected with the solar charging controller in series through an electric lead, the solar charging controller is used for converting direct current into alternating current, the solar charging controller is connected with the solar storage battery in series through an electric lead, and the storage battery is used as a power supply to supply power for the solar heating unit, the osmotic phase absorption unit and the power utilization unit in the membrane distillation unit.
2. The high ammonia-nitrogen wastewater treatment device according to claim 1, wherein the solar heating unit further comprises:
the solar heating circulating magnetic pump is arranged between the outlet of the copper heat exchange coil and the inlet of the light-gathering groove type solar heat collector;
the self-operated temperature regulating valve is arranged between the solar heating circulating magnetic pump and the copper heat exchange coil and is used for controlling the heating temperature of the copper heat exchange coil to be maintained at 60-80 ℃;
the pH real-time monitor is arranged in the feed liquid inlet tank and is used for monitoring the pH value of the feed liquid in real time;
the portable ammonia nitrogen monitor is arranged in the feed liquid inlet tank and used for monitoring the ammonia nitrogen value of the feed liquid in real time.
3. The high ammonia nitrogen wastewater treatment device according to claim 1, wherein the membrane distillation unit further comprises: the system comprises a hot side circulating magnetic pump, a cold side circulating magnetic pump, a hot side rotor flow meter, a cold side rotor flow meter and a temperature monitor; the hot side circulating magnetic pump and the hot side rotor flowmeter are connected in series between an outlet of a raw material liquid inlet tank and an inlet of a hot cavity membrane assembly, the cold side circulating magnetic pump and the cold side rotor flowmeter are connected in series between an outlet of an absorption liquid collecting tank and an inlet of the cold cavity membrane assembly, and a plurality of temperature monitoring meters are arranged at the inlet and the outlet of the parallel flat plate type membrane assembly respectively.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202021499084.5U CN212954706U (en) | 2020-07-27 | 2020-07-27 | High ammonia nitrogen wastewater treatment device based on parallel flat plate type membrane distillation technology |
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| CN202021499084.5U CN212954706U (en) | 2020-07-27 | 2020-07-27 | High ammonia nitrogen wastewater treatment device based on parallel flat plate type membrane distillation technology |
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