CN112408576B - Ozone heterogeneous catalytic oxidation comprehensive test platform and test method - Google Patents
Ozone heterogeneous catalytic oxidation comprehensive test platform and test method Download PDFInfo
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- CN112408576B CN112408576B CN202011211461.5A CN202011211461A CN112408576B CN 112408576 B CN112408576 B CN 112408576B CN 202011211461 A CN202011211461 A CN 202011211461A CN 112408576 B CN112408576 B CN 112408576B
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- CBENFWSGALASAD-UHFFFAOYSA-N Ozone Chemical compound [O-][O+]=O CBENFWSGALASAD-UHFFFAOYSA-N 0.000 title claims abstract description 115
- 238000012360 testing method Methods 0.000 title claims abstract description 33
- 230000003647 oxidation Effects 0.000 title claims abstract description 28
- 238000007254 oxidation reaction Methods 0.000 title claims abstract description 28
- 230000003197 catalytic effect Effects 0.000 title claims abstract description 25
- 238000010998 test method Methods 0.000 title claims description 9
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 470
- 238000005273 aeration Methods 0.000 claims abstract description 67
- 238000011001 backwashing Methods 0.000 claims abstract description 21
- 239000002351 wastewater Substances 0.000 claims abstract description 6
- 239000007789 gas Substances 0.000 claims description 30
- 230000001105 regulatory effect Effects 0.000 claims description 28
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 claims description 22
- 229910052760 oxygen Inorganic materials 0.000 claims description 22
- 239000001301 oxygen Substances 0.000 claims description 22
- 238000004519 manufacturing process Methods 0.000 claims description 20
- 238000003860 storage Methods 0.000 claims description 18
- 239000000945 filler Substances 0.000 claims description 17
- 239000003054 catalyst Substances 0.000 claims description 14
- 239000007788 liquid Substances 0.000 claims description 14
- 238000009826 distribution Methods 0.000 claims description 11
- 239000011521 glass Substances 0.000 claims description 11
- 238000000034 method Methods 0.000 claims description 9
- 238000013461 design Methods 0.000 claims description 6
- 230000001502 supplementing effect Effects 0.000 claims description 6
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims description 5
- 238000010926 purge Methods 0.000 claims description 5
- 229910001220 stainless steel Inorganic materials 0.000 claims description 5
- 239000010935 stainless steel Substances 0.000 claims description 5
- 238000012856 packing Methods 0.000 claims description 4
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims description 3
- 229910052782 aluminium Inorganic materials 0.000 claims description 3
- 238000001816 cooling Methods 0.000 claims description 3
- 239000000498 cooling water Substances 0.000 claims description 3
- 230000014759 maintenance of location Effects 0.000 claims description 3
- 239000000523 sample Substances 0.000 claims description 3
- 229920005372 Plexiglas® Polymers 0.000 claims description 2
- 239000000919 ceramic Substances 0.000 claims description 2
- 239000004926 polymethyl methacrylate Substances 0.000 claims description 2
- 230000009286 beneficial effect Effects 0.000 abstract description 2
- 230000000694 effects Effects 0.000 abstract description 2
- 238000010586 diagram Methods 0.000 description 6
- 230000001276 controlling effect Effects 0.000 description 4
- 230000007797 corrosion Effects 0.000 description 4
- 238000005260 corrosion Methods 0.000 description 4
- 238000005516 engineering process Methods 0.000 description 3
- 239000000463 material Substances 0.000 description 3
- 238000005276 aerator Methods 0.000 description 2
- 238000006243 chemical reaction Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 150000003254 radicals Chemical class 0.000 description 2
- MYMOFIZGZYHOMD-UHFFFAOYSA-N Dioxygen Chemical compound O=O MYMOFIZGZYHOMD-UHFFFAOYSA-N 0.000 description 1
- 230000006978 adaptation Effects 0.000 description 1
- 238000004458 analytical method Methods 0.000 description 1
- 238000006065 biodegradation reaction Methods 0.000 description 1
- 229910052799 carbon Inorganic materials 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 238000013480 data collection Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 229910001882 dioxygen Inorganic materials 0.000 description 1
- 125000002887 hydroxy group Chemical group [H]O* 0.000 description 1
- 238000011065 in-situ storage Methods 0.000 description 1
- 239000010842 industrial wastewater Substances 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 238000012544 monitoring process Methods 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 239000010865 sewage Substances 0.000 description 1
- 239000002912 waste gas Substances 0.000 description 1
- 238000004065 wastewater treatment Methods 0.000 description 1
Classifications
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/72—Treatment of water, waste water, or sewage by oxidation
- C02F1/725—Treatment of water, waste water, or sewage by oxidation by catalytic oxidation
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/34—Treatment of water, waste water, or sewage with mechanical oscillations
- C02F1/36—Treatment of water, waste water, or sewage with mechanical oscillations ultrasonic vibrations
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/72—Treatment of water, waste water, or sewage by oxidation
- C02F1/78—Treatment of water, waste water, or sewage by oxidation with ozone
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2201/00—Apparatus for treatment of water, waste water or sewage
- C02F2201/78—Details relating to ozone treatment devices
- C02F2201/782—Ozone generators
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2209/00—Controlling or monitoring parameters in water treatment
- C02F2209/005—Processes using a programmable logic controller [PLC]
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Hydrology & Water Resources (AREA)
- Environmental & Geological Engineering (AREA)
- Water Supply & Treatment (AREA)
- Organic Chemistry (AREA)
- Mechanical Engineering (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Treatment Of Water By Oxidation Or Reduction (AREA)
Abstract
The invention relates to an ozone heterogeneous catalytic oxidation comprehensive test platform, which comprises the following components: the device comprises an air compressor, a cold dryer, a packed bed, a water inlet system, a water outlet system, an ozone system, an aeration system, a backwashing system and a data acquisition control system; the water inlet system is connected with a water inlet positioned at the bottom of the packed bed through a pipeline, the top of the packed bed is connected with the water outlet system, the ozone system is respectively connected with two sets of aeration systems through gas pipelines in two ways, and each set of aeration system is respectively connected with an aeration port at the bottom of the packed bed through a pipeline; the cold dryer is connected with the air compressor through a pipeline. The beneficial effects of the invention are as follows: the ozone heterogeneous catalytic oxidation comprehensive test platform provided by the invention is provided with the packed bed, so that the treatment effect of different operation modes on wastewater can be compared; a PLC system is arranged for reading and storing data; the comprehensive test platform is visualized, has functions of alarming, interlocking protection and the like, and ensures safe and reliable automatic operation of the system.
Description
Technical Field
The invention relates to the technical field of sewage treatment, in particular to an ozone heterogeneous catalytic oxidation comprehensive test platform and a test method.
Background
Many industrial wastewater has the problems of complex components, high concentration of organic matters, difficult biodegradation and the like, and the ozone catalytic oxidation technology is widely focused and applied as a novel technology in the advanced treatment technology. The ozone catalytic oxidation promotes ozone to decompose and generate hydroxyl free radicals with higher oxidation potential by introducing a catalyst, and the free radical chain reaction is carried out to decompose refractory organic matters in water, so that the ozone utilization rate is improved, and the treatment efficiency is obviously improved.
The method for influencing the heterogeneous catalytic oxidation performance of the ozone mainly comprises the types of catalysts, aeration modes, gas-liquid ratios and the like. The ozone catalytic oxidation equipment developed at present generally has only one aeration mode, the gas dissolving efficiency and the ozone utilization rate of different aeration modes cannot be compared, the operation mode is generally a single tank or a multistage serial tank, the multistage serial tank only collects wastewater treated by the previous stage and waste gas containing ozone into the next stage simply, the wastewater treatment efficiency is low, and the operation mode that a plurality of reaction tanks can be connected in series and can be switched into parallel cannot be realized. Therefore, the ozone heterogeneous catalytic oxidation comprehensive test platform with multiple aeration modes and serial-parallel operation modes is provided, and has important significance.
Disclosure of Invention
The invention aims to overcome the defects in the prior art and provides an ozone heterogeneous catalytic oxidation comprehensive test platform and a test method.
The ozone heterogeneous catalytic oxidation comprehensive test platform comprises: the device comprises an air compressor, a cold dryer, a packed bed, a water inlet system, a water outlet system, an ozone system, an aeration system, a backwashing system and a data acquisition control system; the water inlet system is connected with a water inlet positioned at the bottom of the packed bed through a pipeline, the top of the packed bed is connected with the water outlet system, the ozone system is respectively connected with two sets of aeration systems through gas pipelines in two ways, and each set of aeration system is respectively connected with an aeration port at the bottom of the packed bed through a pipeline; the cold dryer is connected with the air compressor through a pipeline, and a manual valve is arranged on the pipeline between the cold dryer and the air compressor; the data acquisition control system comprises a program control system (PLC) and a touch screen. The program control system (PLC) is used for controlling the start and stop of the water inlet lifting pump I, the water inlet lifting pump II, the ejector booster pump, the dissolved air pump, the ultrasonic processor booster pump and the backwashing water pump; the program control system (PLC) is used for controlling the on-off of the pneumatic control valve; the program control system (PLC) is used for adjusting the opening of the first water inlet lifting pump and the second water inlet lifting pump; the touch screen is used for realizing process flow diagrams, setting all parameters, collecting and displaying data and reading and storing historical data; parameters monitored and controlled include, but are not limited to, O 3 concentration, pressure, flow, COD, pH, conductivity, and the like; the program control system can set and modify related process parameters and alarm limits according to the needs; the instrument operator can directly operate the instrument according to the traditional instrument using method; and when the related parameter exceeds the preset upper limit, an alarm signal is sent out in time.
Preferably, the packed bed comprises a first packed bed and a second packed bed; the bottom of the packed bed is provided with a packed bed base, a water inlet, an aeration port and a water outlet; a circulating water port is arranged on the side wall of the bottom of the packed bed; a water distribution device for water inlet and air inlet of the bed body is arranged in the bottom of the packed bed; a packing layer is arranged in the packed bed body and is positioned above the water distribution device; two adjacent manholes are arranged at the lower part of one side surface of the packed bed body, one manhole is also arranged at the upper part of the side surface, and each manhole is provided with a sight glass; the top of the packed bed is provided with a water outlet, an air outlet, a two-way breather valve and a pressure sensor; filter screens are arranged on the inner sides of the water inlet and the water outlet of the packed bed; the whole packed bed is cylindrical, the circulating water port is positioned at the bottom of the front side surface of the packed bed, the manhole and the sight glass are positioned at the rear side surface of the packed bed, the water inlet is positioned at the bottom of the left side surface of the packed bed, and the water outlet is positioned at the top of the right side surface of the packed bed; the exhaust port and the two-way breather valve are both arranged on the arc-shaped top of the packed bed; the aeration port is positioned at the center of the arc-shaped bottom of the packed bed, and the water outlet is also arranged at the arc-shaped bottom of the packed bed close to the aeration port; the packing bed base is provided with four supporting feet which are respectively welded on two brackets which are mutually vertical; the water distribution device comprises a porous plate and a water cap, wherein the water cap is made of corrosion-resistant and oxidation-resistant materials such as SSL corrosion-resistant stainless steel.
Preferably, the water inlet system and the water outlet system include: a raw water tank, a first water inlet lifting pump, a second water inlet lifting pump, a first water production tank and a second water production tank; a water outlet is arranged at the bottom of the original water tank, and a manual valve is arranged at the water outlet; a water outlet is arranged at the bottom of the original water tank, and a manual valve is arranged on a water drain pipeline behind the water outlet; the side surface of the raw water tank is provided with a liquid level meter, and an online pH meter, an online conductivity meter and an online COD measuring instrument are arranged in the raw water tank; the top of the original water tank is provided with a water inlet, a manual valve is arranged at the water inlet, and the water inlet is connected with an external waste water pipeline; the water outlet of the original water tank is divided into two paths which are respectively connected with a water inlet lifting pump I and a water inlet lifting pump; a manual valve is arranged on a pipeline between the first water inlet lifting pump and the water outlet of the original water tank, the first water inlet lifting pump is connected with the water inlet of the first packed bed, and a pneumatic regulating valve and an electromagnetic flowmeter are arranged on the pipeline between the first water inlet lifting pump and the water inlet of the first packed bed; a manual valve is arranged on a pipeline between the water inlet lifting pump and the water outlet of the original water tank, the water inlet lifting pump is connected with the water inlet of the second packed bed, and the manual valve is arranged on a pipeline between the water inlet lifting pump and the water inlet of the second packed bed; the bottoms of the first water producing tank and the second water producing tank are respectively provided with a water outlet, and manual valves are respectively arranged at the water outlets; the bottoms of the first water producing tank and the second water producing tank are internally provided with aeration discs, the bottoms of the first water producing tank and the second water producing tank are respectively provided with an aeration air inlet, and the air inlets are connected with a cold dryer through an air pipeline; the bottoms of the first water producing tank and the second water producing tank are provided with water outlets, and a manual valve is arranged on a water discharge pipeline behind the water outlets; the side surfaces of the first water producing tank and the second water producing tank are respectively provided with a liquid level meter, and the first water producing tank and the second water producing tank are respectively internally provided with an online pH meter, an online conductivity meter and an online COD measuring instrument; the top parts of the first water producing tank and the second water producing tank are provided with backwash water supplementing water inlets; the water outlet pipeline of the first packed bed is divided into two paths which are respectively connected with the first water producing tank and the second water inlet lifting pump; the water outlet of the second packed bed is connected with the second water producing tank; pneumatic adjusting valves are arranged on the two water outlet pipelines of the first packed bed and the water outlet pipeline of the second packed bed, air supply valves are arranged on the pneumatic adjusting valves, the pneumatic adjusting valves are connected with a cold dryer through pipelines, and a one-way check valve is further arranged on the connecting pipeline; the probes of the online pH meter, the online conductivity meter and the online COD measuring instrument in the raw water tank, the first water production tank and the second water production tank are all positioned below the liquid level.
Preferably, the ozone system comprises an oxygen storage tank, an ozone generator, an ozone tail gas destructor, an online ozone concentration detector and an air mass flowmeter; the air source is connected with the oxygen storage tank which is connected with the ozone generator, and the outlet of the ozone generator is connected with the on-line ozone concentration detector; a manual valve is arranged in front of the oxygen storage tank, and a manual valve is arranged between the oxygen storage tank and the ozone generator; a gas mass flowmeter, a manual valve and a one-way check valve are arranged on a gas pipeline between the ozone generator and each set of aeration system; the ozone tail gas destructor is connected with the exhaust ports on the first packed bed and the second packed bed respectively through pipelines, and a manual valve is arranged on the pipeline between the ozone tail gas destructor and the exhaust ports; the ozone generator is provided with a cooling circulating water pipeline.
Preferably, the aeration system includes: jet device, jet device booster pump, dissolved air pump, ultrasonic processor and ultrasonic processor booster pump; aeration is mainly divided into three forms: the air outlet pipeline of the ozone generator is divided into three paths after being provided with a one-way check valve, and the three paths are respectively connected with the air inlet ends of the ejector, the dissolved air pump and the ultrasonic processor; the pipelines after the circulating water ports on the first packed bed and the second packed bed are equally divided into three paths, and are respectively connected with the ejector booster pump, the water absorbing end of the dissolved air pump and the ultrasonic processor booster pump, and each path of pipeline is provided with a manual valve; the ejector booster pump is connected with the water absorbing end of the ejector, the ejector is additionally provided with a bypass, and the bypass is provided with a manual valve; the booster pump of the ultrasonic processor is connected with the water inlet end of the ultrasonic processor, and outlet pipelines of the ejector, the dissolved air pump and the ultrasonic processor are respectively connected with aeration openings on the first packed bed and the second packed bed after converging on one path.
Preferably, a backwashing water pump is arranged in the backwashing system; the air compressor provides back washing air, and an air outlet pipeline of the cold dryer is respectively connected with water inlets of the first packed bed and the second packed bed in two paths; the first water producing tank and the second water producing tank are used as backwash water inlet tanks, the water outlet pipelines of the first water producing tank and the second water producing tank are converged in one pipeline to be connected with a backwash water pump, the backwash water pump is connected with a water inlet of a packed bed, and a pneumatic adjusting valve and an electromagnetic flowmeter are arranged on the pipeline between the backwash water pump and the water inlet of the packed bed.
Preferably, the area of the sight glass positioned on the rear side of the packed bed body is smaller than that of the manhole; the first packed bed and the second packed bed are made of stainless steel or organic glass.
The test method of the ozone heterogeneous catalytic oxidation comprehensive test platform comprises the following steps:
Step 1, filling different types of catalyst fillers into a filler layer from manholes at the upper parts of a first filler bed and a second filler bed respectively; opening air switches of all circuits in the air compressor, the cold dryer, the ozone system and the data acquisition control system; turning on power switches of all machines in the air compressor, the cold dryer and the ozone system; opening an air outlet valve of an air compressor, a one-way check valve behind a cold dryer, an oxygen inlet valve in front of an oxygen storage tank, an ozone outlet valve, and an air mass flowmeter, a jet device or an air inlet valve of an ultrasonic processor or a dissolved air pump which are arranged on an ozone outlet pipeline, and purging the machine and the pipeline;
Step 2, opening a valve in front of a water inlet of the original water tank to enable the original water tank to enter water, and opening a valve at a water outlet of the original water tank, a valve in front of a water inlet lifting pump II, an air supply valve of a pneumatic regulating valve, a water inlet valve and a water outlet valve of an ejector or an ultrasonic processor or a dissolved air pump;
Step 3, entering an operation interface of a program control system (PLC system), and starting a first water inlet lifting pump, a second water inlet lifting pump, a jet booster pump or an ultrasonic processor booster pump or a pneumatic regulating valve of a water outlet of a filler bed; calculating water inflow according to the hydraulic retention time of the test design, and adjusting the opening of the pneumatic adjusting valve to enable the reading of the electromagnetic flowmeter to be the calculated water inflow;
And 4, starting circulating cooling water of the ozone generator, starting ozone on an operation interface of a program control system, calculating the ozone demand according to the gas-liquid ratio of the test design, and regulating current, ozone addition rate and ozone gas flow to achieve the calculated ozone demand. ;
Step 5, reading the COD, the O 3 concentration, the pH value and the conductivity value of the inlet water and the outlet water according to the test running time;
Step 6, when backwashing operation is carried out, opening backwash water supplementing port valves at the tops of the first water producing tank and the second water producing tank, and opening backwash water valves and backwash gas valves arranged after the cold dryer; setting the opening of a pneumatic regulating valve of the backwashing water pump on an operation interface of the program control system, starting the backwashing water pump, and establishing a backwashing environment.
Preferably, the step 3 specifically includes the following steps:
Step 3.1, when the aeration mode is selected to be the aeration mode of the ejector, opening an air inlet valve, a water inlet valve and a water outlet valve of the ejector; starting a booster pump of the ejector, and adjusting the inlet and outlet pressure of the ejector; closing all the valves related to the ultrasonic processor and the dissolved air pump;
Step 3.2, when the aeration mode is selected to be the aeration mode of the ultrasonic processor, opening an air inlet valve, a water inlet valve and a water outlet valve in front of the ultrasonic processor; starting a booster pump of the ultrasonic processor, and adjusting the inlet and outlet pressure of the ultrasonic processor; closing all the valves of the ejector and the dissolved air pump;
step 3.3, when the aeration mode is selected as the aeration mode of the dissolved air pump, opening an air inlet valve, a water inlet valve and a water outlet valve in front of the dissolved air pump; starting a dissolved air pump and adjusting the inlet and outlet pressure of the dissolved air pump; closing all the valves related to the ejector and the ultrasonic processor;
Step 3.4, when the operation mode is selected to be series connection, opening a pneumatic regulating valve on a pipeline between a water outlet of the first packed bed and a water inlet lifting pump II in front of the second packed bed; closing a pneumatic control valve on a pipeline between a water outlet of the first packed bed and the first water production tank, and taking the water outlet of the first packed bed as water inlet of the second packed bed;
step 3.5, when the operation mode is selected to be parallel connection, closing a pneumatic regulating valve on a pipeline between a water outlet of the first packed bed and a water inlet lifting pump II in front of the second packed bed; opening a pneumatic regulating valve on a pipeline between a water outlet of the first packed bed and the first water producing tank, and enabling water discharged from the first packed bed and water discharged from the second packed bed to enter the first water producing tank and the second water producing tank respectively.
Preferably, the catalyst filler in the step 1 is an aluminum-based catalyst, an activated carbon-based catalyst or a ceramic-based catalyst; the time for purging the machine and piping with oxygen is 30-60 minutes.
The beneficial effects of the invention are as follows: the ozone heterogeneous catalytic oxidation comprehensive test platform provided by the invention has a plurality of aeration modes, can be switched to different aeration modes at will, and can evaluate the influence of different aeration modes on the ozone utilization rate; the filler beds are arranged to realize two operation modes of series connection and parallel connection, so that the treatment effect of different operation modes on wastewater can be compared; the PLC system is provided with parameters such as inflow, ozone flow, gas-liquid ratio and the like, and a plurality of indexes such as inflow and outflow COD, pH, conductivity and the like are read and stored on the PLC system.
Drawings
FIG. 1 is a schematic structural diagram of an ozone heterogeneous catalytic oxidation comprehensive test platform;
FIG. 2 is a schematic diagram of a packed bed configuration;
FIG. 3 is a schematic diagram of a packed bed water distribution device;
FIG. 4 is a schematic top view of a packed bed;
FIG. 5 is a schematic view of the bottom structure of a packed bed;
Reference numerals illustrate: the air compressor 1, the cold dryer 2, the raw water tank 3, the water inlet 4, the aeration port 5, the water outlet 6, the circulating water port 7, the water distribution device 8, the manhole 9, the sight glass 10, the water outlet 11, the air outlet 12, the two-way breather valve 13, the filter screen 14, the first packed bed 15, the second packed bed 16, the first water inlet lifting pump 17, the second water inlet lifting pump 18, the first water producing tank 19, the second water producing tank 20, the pneumatic control valve 21, the electromagnetic flowmeter 22, the one-way check valve 23, the aeration disc 24, the oxygen gas storage tank 25, the ozone generator 26, the ozone tail gas destructor 27, the online ozone concentration detector 28, the gas mass flowmeter 29, the jet device 30, the jet device booster pump 31, the dissolved air pump 32, the ultrasonic processor 33, the ultrasonic processor booster pump 34, the backwash water pump 35 and the packed bed base 36.
Detailed Description
The invention is further described below with reference to examples. The following examples are presented only to aid in the understanding of the invention. It should be noted that it will be apparent to those skilled in the art that modifications can be made to the present invention without departing from the principles of the invention, and such modifications and adaptations are intended to be within the scope of the invention as defined in the following claims.
An ozone heterogeneous catalytic oxidation integrated test platform, as shown in fig. 1, comprises: the air compressor 1, the cold dryer 2, the packed bed, the water inlet system, the water outlet system, the ozone system, the aeration system, the backwashing system and the data acquisition control system; the water inlet system is connected with a water inlet 4 positioned at the bottom of the packed bed through a pipeline, the top of the packed bed is connected with the water outlet system, the ozone system is respectively connected with two sets of aeration systems through gas pipelines in two ways, and each set of aeration system is respectively connected with an aeration port 5 at the bottom of the packed bed through a pipeline; the cold dryer 2 is connected with the air compressor 1 through a pipeline, and a manual valve is arranged on the pipeline between the cold dryer 2 and the air compressor 1; the data acquisition control system comprises a program control system (PLC) and a touch screen. The program control system (PLC) is used for controlling the start and stop of the first water inlet lifting pump 17, the second water inlet lifting pump 18, the ejector booster pump 31, the dissolved air pump 32, the ultrasonic processor booster pump 34 and the backwashing water pump 35; the program control system (PLC) is used for controlling the on-off of the pneumatic control valve 21; the program control system (PLC) is used for improving the opening of the first water inlet lifting pump 17 and the second water inlet lifting pump 18; the touch screen is used for realizing process flow diagrams, setting all parameters, collecting and displaying data and reading and storing historical data; parameters monitored and controlled include, but are not limited to, O 3 concentration, pressure, flow, COD, pH, conductivity, and the like; the program control system can set and modify related process parameters and alarm limits according to the needs; the instrument operator can directly operate the instrument according to the traditional instrument using method; and when the related parameter exceeds the preset upper limit, an alarm signal is sent out in time.
The structure schematic diagram of the packed bed is shown in fig. 2, and the packed bed comprises a first packed bed 15 and a second packed bed 16; as shown in fig. 5, the bottom of the packed bed is provided with a packed bed base 36, a water inlet 4, an aeration port 5 and a water outlet 6; a circulating water port 7 is arranged on the side wall of the bottom of the packed bed; as shown in fig. 3, a water distribution device 8 for feeding water and air to the bed body is arranged in the bottom of the packed bed; a packing layer is arranged in the packed bed body and is positioned above the water distribution device 8; two adjacent manholes 9 are arranged at the lower part of one side surface of the packed bed body, one manhole 9 is also arranged at the upper part of the side surface, and a sight glass 10 is arranged on each manhole 9; as shown in fig. 4, the top of the packed bed is provided with a water outlet 11, an air outlet 12, a two-way breather valve 13 and a pressure sensor; the inner sides of the water inlet 4 and the water outlet 11 on the packed bed are respectively provided with a filter screen 14; the whole packed bed is cylindrical, the circulating water port 7 is positioned at the bottom of the front side surface of the packed bed, the manhole 9 and the sight glass 10 are positioned at the rear side surface of the packed bed, the water inlet 4 is positioned at the bottom of the left side surface of the packed bed, and the water outlet 11 is positioned at the top of the right side surface of the packed bed; the exhaust port 12 and the two-way breather valve 13 are both arranged on the arc-shaped top of the packed bed; the aeration port 5 is positioned at the center of the arc-shaped bottom of the packed bed, and the water outlet 6 is also arranged at the arc-shaped bottom of the packed bed close to the aeration port 5; the packed bed base 36 has four legs which are welded to two brackets perpendicular to each other; the water distribution device 8 comprises a porous plate and a water cap, and the water cap is made of corrosion-resistant and oxidation-resistant materials such as SS316L corrosion-resistant stainless steel.
The water inlet system and the water outlet system comprise: the water tank comprises a raw water tank 3, a first water inlet lifting pump 17, a second water inlet lifting pump 18, a first water production tank 19 and a second water production tank 20; a water outlet is arranged at the bottom of the original water tank 3, and a manual valve is arranged at the water outlet; a water outlet is arranged at the bottom of the original water tank 3, and a manual valve is arranged on a water drain pipeline behind the water outlet; the side surface of the raw water tank 3 is provided with a liquid level meter, and the raw water tank 3 is internally provided with an online pH meter, an online conductivity meter and an online COD measuring instrument; the top of the raw water tank 3 is provided with a water inlet, a manual valve is arranged at the water inlet, and the water inlet is connected with an external waste water pipeline; the water outlet of the original water tank 3 is divided into two paths which are respectively connected with a water inlet lifting pump 17 and a water inlet lifting pump 18; a manual valve is arranged on a pipeline between the first water inlet lifting pump 17 and the water outlet of the original water tank 3, the first water inlet lifting pump 17 is connected with the water inlet 4 of the first packed bed 15, and a pneumatic regulating valve 21 and an electromagnetic flowmeter 22 are arranged on the pipeline between the first water inlet lifting pump 17 and the water inlet 4 of the first packed bed 15; a manual valve is arranged on a pipeline between the water inlet lifting pump 18 and the water outlet of the original water tank 3, the water inlet lifting pump 18 is connected with the water inlet 4 of the second packed bed 16, and the manual valve is arranged on a pipeline between the water inlet lifting pump 18 and the water inlet 4 of the second packed bed 16; the bottoms of the first water producing tank 19 and the second water producing tank 20 are respectively provided with a water outlet, and manual valves are respectively arranged at the water outlets; an aeration disc 24 is arranged inside the bottoms of the first water producing tank 19 and the second water producing tank 20, aeration air inlets are arranged at the bottoms of the first water producing tank 19 and the second water producing tank 20, and the air inlets are connected with the cold dryer 2 through an air pipeline; the bottoms of the first water producing tank 19 and the second water producing tank 20 are provided with water outlets, and a manual valve is arranged on a water discharge pipeline behind the water outlets; the side surfaces of the first water producing tank 19 and the second water producing tank 20 are respectively provided with a liquid level meter, and the first water producing tank 19 and the second water producing tank 20 are respectively internally provided with an online pH meter, an online conductivity meter and an online COD measuring instrument; the tops of the first water producing tank 19 and the second water producing tank 20 are provided with backwash water supplementing water inlets; the water outlet pipeline of the first packed bed 15 is divided into two paths which are respectively connected with a first water producing tank 19 and a second water inlet lifting pump 18; the water outlet 11 of the second packed bed 16 is connected with the second water producing tank 20; the two water outlet pipelines of the first packed bed 15 and the water outlet pipeline of the second packed bed 16 are respectively provided with a pneumatic regulating valve 21, the pneumatic regulating valves 21 are respectively provided with an air supply valve, the pneumatic regulating valves 21 are respectively connected with the cold dryer 2 through pipelines, and the connecting pipelines are also provided with one-way check valves 23; the probes of the online pH meter, the online conductivity meter and the online COD measuring instrument in the raw water tank 3, the first water production tank 19 and the second water production tank 20 are all positioned below the liquid level.
The ozone system comprises an oxygen storage tank 25, an ozone generator 26, an ozone tail gas destructor 27, an on-line ozone concentration detector 28 and a gas mass flowmeter 29; the air source is connected into an oxygen storage tank 25, the oxygen storage tank 25 is connected with an ozone generator 26, and the outlet of the ozone generator 26 is connected with an on-line ozone concentration detector 28; a manual valve is arranged in front of the oxygen storage tank 25, and a manual valve is arranged between the oxygen storage tank 25 and the ozone generator 26; a gas mass flowmeter 29, a manual valve and a one-way check valve 23 are arranged on the gas pipeline between the ozone generator 26 and each set of aeration system; the ozone tail gas destructor 27 is respectively connected with the exhaust ports 12 on the first packed bed 15 and the second packed bed 16 through pipelines, and a manual valve is arranged on the pipeline between the ozone tail gas destructor 27 and the exhaust port 12; the ozone generator 26 is provided with a cooling circulation water pipe.
The aeration system includes: ejector 30, ejector booster pump 31, dissolved air pump 32, ultrasonic processor 33, and ultrasonic processor booster pump 34; aeration is mainly divided into three forms: the jet aerator, the dissolved air pump aeration and the ultrasonic aeration are respectively divided into three paths after a one-way check valve 23 is arranged on an air outlet pipeline of the ozone generator 26, the three paths are respectively connected with air inlet ends of the jet aerator 30, the dissolved air pump 32 and the ultrasonic processor 33, and each path of pipeline is provided with a manual valve; the pipelines on the first packed bed 15 and the second packed bed 16 after the circulating water gap 7 are equally divided into three paths, which are respectively connected with the ejector booster pump 31, the water absorbing end of the dissolved air pump 32 and the ultrasonic processor booster pump 34, and each path of pipeline is provided with a manual valve; the ejector booster pump 31 is connected with the water absorbing end of the ejector 30, the ejector 30 is additionally provided with a bypass, and a manual valve is arranged on the bypass; the ultrasonic processor booster pump 34 is connected with the water inlet end of the ultrasonic processor 33, and outlet pipelines of the ejector 30, the dissolved air pump 32 and the ultrasonic processor 33 are respectively connected with the aeration openings 5 on the first packed bed 15 and the second packed bed 16 after converging on one path.
A backwash water pump 35 is arranged in the backwash system; the air compressor 1 provides back washing gas, and an air outlet pipeline of the cold dryer 2 is respectively connected with water inlets 4 of the first packed bed 15 and the second packed bed 16 in two ways; the first water producing tank 19 and the second water producing tank 20 are used as backwash water inlet tanks, the water outlet pipelines of the first water producing tank 19 and the second water producing tank 20 are connected with a backwash water pump 35, the backwash water pump 35 is connected with a packed bed water inlet 4, and a pneumatic adjusting valve 21 and an electromagnetic flowmeter 22 are arranged on the pipeline between the backwash water pump 35 and the packed bed water inlet 4.
The area of the sight glass 10 positioned on the back side of the packed bed body is smaller than that of the manhole 9; the material of the first packed bed 15 and the second packed bed 16 is stainless steel or plexiglas.
As an example, the test method of the ozone heterogeneous catalytic oxidation comprehensive test platform comprises the following steps:
Filling aluminum-based catalyst and carbon-based catalyst filler into filler layers of a first filler bed and a second filler bed from a manhole at the upper part of the filler beds respectively; opening all air switches of the air compressor, the cold dryer, the ozone system and the data acquisition control system; turning on power switches on all machines of the air compressor, the cold dryer and the ozone system; and (3) opening an air outlet valve of the air compressor, a one-way check valve behind the cold dryer, an oxygen inlet valve in front of an oxygen storage tank, an ozone outlet valve, a gas mass flowmeter arranged on an ozone outlet pipeline and an air inlet valve of an ejector, and purging the machine and the pipeline for 30 minutes. And opening a front valve of a water inlet of the original water tank to enable the original water tank to enter water, and opening a valve at a water outlet of the original water tank, two front valves of the water inlet lifting pumps, an air supply valve of a pneumatic regulating valve, a water inlet valve of an ejector and a water outlet valve.
And after the cabinet is powered on, the cabinet enters a PLC system operation interface, the hydraulic retention time is 0.5 hour according to the test design, the opening of the front pneumatic regulating valves of the two water inlet lifting pumps is set to be 40%, the first water inlet lifting pump, the second water inlet lifting pump and the pneumatic valves of the water outlets of the two packed beds are clicked and started, so that the two packed beds start to feed water, and the opening of the pneumatic regulating valves is regulated according to the actual running condition until the water inlet flow is displayed to be 0.8m 3/h. The aeration mode is selected as ejector aeration, an air inlet valve, a water inlet valve and a water outlet valve of the ejector are opened, an ejector booster pump is started, the inlet and outlet pressure of the ejector is regulated to 0.050MPa, and the related valves of the ultrasonic processor and the dissolved air pump are completely closed. The operation mode is selected to be parallel connection, a pneumatic valve on a pipeline between a water outlet of the first packed bed and a water inlet lifting pump of the second packed bed is closed, a pneumatic valve on a pipeline between the water outlet of the first packed bed and the first water production tank is opened, and water outlet of the first packed bed and water outlet of the second packed bed respectively enter the first water production tank and the second water production tank.
Circulating cooling water of the ozone generator is started, ozone preparation is started by clicking on an operation interface of the PLC system, ozone demand is calculated according to a gas-liquid ratio of 150mg/L of test design, the air inlet pressure of the ozone generator is regulated and adjusted to be 0.100-0.110MPa, the current of the ozone generator is 4A, the ozone addition rate is 71-77%, the total flow of ozone gas is 3.0-3.2m < 3 >/h, and the concentration of an ozone outlet is 80mg/L, so that the target ozone yield is achieved. During backwashing operation, a backwash water supplementing valve at the top of the water production tank, a backwash water valve and a backwash air valve which are arranged behind the cold dryer are opened, the opening of a pneumatic adjusting valve of the backwash water pump is set to be 60% on an operation interface of the PLC system, the backwash water pump is started, and a backwash environment is established.
The test process collects the measurement data of each sensor and each instrument in real time, and the data collection control system is matched with the on-site control system, and adopts PLC control, screen display and control. The water inlet flow of the water inlet and outlet system, the air suction amount of the aeration system, the ozone flow and outlet concentration of the ozone system, the backwash water flow of the backwash system, backwash air flow and other operations can be controlled in situ or automatically by a PLC. The electromagnetic flowmeter, the valve, the water inlet and outlet COD, the O 3 concentration detector, the pH meter, the conductivity meter and the matched data acquisition module are all provided with communication interfaces, signals of the sensors and the monitoring meters can be transmitted to the PLC in real time, and the control, the management and the analysis of the test device are completed through the set logic.
Claims (8)
1. An ozone heterogeneous catalytic oxidation integrated test platform, comprising: the device comprises an air compressor (1), a cold dryer (2), a packed bed, a water inlet system, a water outlet system, an ozone system, an aeration system, a backwashing system and a data acquisition control system; the water inlet system is connected with a water inlet (4) positioned at the bottom of the packed bed through a pipeline, the top of the packed bed is connected with the water outlet system, the ozone system is respectively connected with two sets of aeration systems through gas pipelines in two ways, and each set of aeration system is respectively connected with an aeration port (5) at the bottom of the packed bed through a pipeline; the cold dryer (2) is connected with the air compressor (1) through a pipeline; the data acquisition control system comprises a program control system and a touch screen; the aeration system includes: an ejector (30), an ejector booster pump (31), a dissolved air pump (32), an ultrasonic processor (33) and an ultrasonic processor booster pump (34); the one-way check valve (23) on the air outlet pipeline of the ozone generator (26) is divided into three paths, which are respectively connected with the air inlet ends of the ejector (30), the dissolved air pump (32) and the ultrasonic processor (33), and each path of pipeline is provided with a manual valve; the packed bed comprises a first packed bed (15) and a second packed bed (16); a circulating water port (7) is arranged on the side wall of the bottom of the packed bed; the pipelines on the first packed bed (15) and the second packed bed (16) after the circulating water gap (7) are equally divided into three paths, which are respectively connected with the ejector booster pump (31), the water absorbing end of the dissolved air pump (32) and the ultrasonic processor booster pump (34), and each path of pipeline is provided with a manual valve; the ejector booster pump (31) is connected with the water absorbing end of the ejector (30), the ejector (30) is additionally provided with a bypass, and the bypass is provided with a manual valve; the booster pump (34) of the ultrasonic processor is connected with the water inlet end of the ultrasonic processor (33), and outlet pipelines of the ejector (30), the dissolved air pump (32) and the ultrasonic processor (33) are respectively connected with aeration openings (5) on the first packed bed (15) and the second packed bed (16) after converging on one path;
A backwashing water pump (35) is arranged in the backwashing system; the air outlet pipeline of the cold dryer (2) is respectively connected with the water inlets (4) of the first packed bed (15) and the second packed bed (16) in two ways; the first water producing tank (19) and the second water producing tank (20) are used as backwash water inlet tanks, the water outlet pipelines of the first water producing tank (19) and the second water producing tank (20) are connected with a backwash water pump (35) in one path, the backwash water pump (35) is connected with a packed bed water inlet (4), and a pneumatic regulating valve (21) and an electromagnetic flowmeter (22) are arranged on the pipeline between the backwash water pump (35) and the packed bed water inlet (4).
2. The ozone heterogeneous catalytic oxidation integrated test platform of claim 1, wherein: the bottom of the packed bed is provided with a packed bed base (36), a water inlet (4), an aeration port (5) and a water outlet (6); a water distribution device (8) for water inlet and air inlet of the bed body is arranged in the bottom of the packed bed; a packing layer is arranged in the packed bed body and is positioned above the water distribution device (8); two adjacent manholes (9) are arranged at the lower part of one side surface of the packed bed body, one manhole (9) is also arranged at the upper part of the side surface, and each manhole (9) is provided with a sight glass (10); the top of the packed bed is provided with a water outlet (11), an exhaust port (12), a two-way breather valve (13) and a pressure sensor; the inner sides of the water inlet (4) and the water outlet (11) on the packed bed are respectively provided with a filter screen (14);
The whole packed bed is cylindrical, the circulating water port (7) is positioned at the bottom of the front side surface of the packed bed, the manhole (9) and the sight glass (10) are positioned at the rear side surface of the packed bed, the water inlet (4) is positioned at the bottom of the left side surface of the packed bed, and the water outlet (11) is positioned at the top of the right side surface of the packed bed; the exhaust port (12) and the two-way breather valve (13) are both arranged on the arc-shaped top of the packed bed; the aeration opening (5) is positioned at the center of the arc-shaped bottom of the packed bed, and the water outlet (6) is also arranged at the arc-shaped bottom of the packed bed close to the aeration opening (5); the packed bed base (36) is provided with four supporting feet which are respectively welded on two brackets which are mutually vertical; the water distribution device (8) comprises a porous plate and a water cap.
3. The ozone heterogeneous catalytic oxidation integrated test platform of claim 1, wherein the water inlet system and the water outlet system comprise: the device comprises a raw water tank (3), a first water inlet lifting pump (17), a second water inlet lifting pump (18), a first water production tank (19) and a second water production tank (20);
A water outlet is arranged at the bottom of the original water tank (3), and a manual valve is arranged at the water outlet; a water outlet is arranged at the bottom of the original water tank (3), and a manual valve is arranged on a water drain pipeline behind the water outlet; the side surface of the original water tank (3) is provided with a liquid level meter, and an online pH meter, an online conductivity meter and an online COD measuring instrument are arranged in the original water tank (3); a water inlet is arranged at the top of the original water tank (3), a manual valve is arranged at the water inlet, and the water inlet is connected with an external waste water pipeline; the water outlet of the original water tank (3) is divided into two paths which are respectively connected with a first water inlet lifting pump (17) and a second water inlet lifting pump (18); a manual valve is arranged on a pipeline between the first water inlet lifting pump (17) and the water outlet of the original water tank (3), the first water inlet lifting pump (17) is connected with the water inlet (4) of the first packed bed (15), and a pneumatic regulating valve (21) and an electromagnetic flowmeter (22) are arranged on the pipeline between the first water inlet lifting pump (17) and the water inlet (4) of the first packed bed (15); a manual valve is arranged on a pipeline between the second water inlet lifting pump (18) and the water outlet of the original water tank (3), the second water inlet lifting pump (18) is connected with the water inlet (4) of the second packed bed (16), and the manual valve is arranged on a pipeline between the second water inlet lifting pump (18) and the water inlet (4) of the second packed bed (16);
The bottoms of the first water producing tank (19) and the second water producing tank (20) are respectively provided with a water outlet, and manual valves are respectively arranged at the water outlets; an aeration disc (24) is arranged in the bottoms of the first water producing tank (19) and the second water producing tank (20), aeration air inlets are formed in the bottoms of the first water producing tank (19) and the second water producing tank (20), and the air inlets are connected with a cold dryer (2) through an air pipeline; the bottoms of the first water producing tank (19) and the second water producing tank (20) are provided with water outlets, and a manual valve is arranged on a water drainage pipeline behind the water outlets; the side surfaces of the first water producing tank (19) and the second water producing tank (20) are respectively provided with a liquid level meter, and the first water producing tank (19) and the second water producing tank (20) are respectively internally provided with an online pH meter, an online conductivity meter and an online COD measuring instrument; the tops of the first water producing tank (19) and the second water producing tank (20) are provided with backwash water supplementing water inlets; the water outlet pipeline of the first packed bed (15) is divided into two paths which are respectively connected with a first water producing tank (19) and a second water inlet lifting pump (18); a water outlet (11) of the second packed bed (16) is connected with a second water producing tank (20); pneumatic regulating valves (21) are arranged on the two water outlet pipelines of the first packed bed (15) and the water outlet pipeline of the second packed bed (16), air supply valves are arranged on the pneumatic regulating valves (21), the pneumatic regulating valves (21) are connected with the cold dryer (2) through pipelines, and a one-way check valve (23) is further arranged on the connecting pipeline; the probes of the online pH meter, the online conductivity meter and the online COD measuring instrument in the original water tank (3), the first water production tank (19) and the second water production tank (20) are all positioned below the liquid level.
4. The ozone heterogeneous catalytic oxidation integrated test platform of claim 1, wherein: the ozone system comprises an oxygen storage tank (25), an ozone generator (26), an ozone tail gas destructor (27), an online ozone concentration detector (28) and a gas mass flowmeter (29); the air source is connected with an oxygen storage tank (25), the oxygen storage tank (25) is connected with an ozone generator (26), and the outlet of the ozone generator (26) is connected with an on-line ozone concentration detector (28); a manual valve is arranged in front of the oxygen storage tank (25), and a manual valve is arranged between the oxygen storage tank (25) and the ozone generator (26); a gas mass flowmeter (29), a manual valve and a one-way check valve (23) are arranged on a gas pipeline between the ozone generator (26) and each set of aeration system; the ozone tail gas destructor (27) is respectively connected with the exhaust ports (12) on the first packed bed (15) and the second packed bed (16) through pipelines, and a manual valve is arranged on the pipeline between the ozone tail gas destructor (27) and the exhaust ports (12); the ozone generator (26) is provided with a cooling circulating water pipeline.
5. The ozone heterogeneous catalytic oxidation integrated test platform of claim 2, wherein: the area of the sight glass (10) positioned on the back side surface of the packed bed body is smaller than the area of the manhole (9); the first packed bed (15) and the second packed bed (16) are made of stainless steel or plexiglas.
6. A test method of the ozone heterogeneous catalytic oxidation integrated test platform according to claim 1, comprising the following steps:
step 1, filling different types of catalyst fillers into a filler layer from manholes (9) at the upper parts of a first filler bed (15) and a second filler bed (16) respectively; opening air switches of all circuits in the air compressor (1), the cold dryer (2), the ozone system and the data acquisition control system; opening power switches of all machines in the air compressor (1), the cold dryer (2) and the ozone system; opening an air outlet valve of an air compressor (1), a one-way check valve (23) behind a cold dryer (2), an oxygen inlet valve, an ozone outlet valve, a gas mass flowmeter (29), an ejector (30) or an air inlet valve of an ultrasonic processor (33) or a dissolved air pump (32) in front of an oxygen storage tank (25), and purging the machine and the pipeline;
Step 2, opening a valve in front of a water inlet of the original water tank (3) to enable the original water tank (3) to enter water, opening a valve at a water outlet of the original water tank (3), a valve in front of a water inlet lifting pump II (18), an air supply valve of a pneumatic regulating valve (21), a water inlet valve and a water outlet valve of an ejector (30) or an ultrasonic processor (33) or a dissolved air pump (32);
Step 3, entering a program control system operation interface, and starting a first water inlet lifting pump (17), a second water inlet lifting pump (18), an ejector booster pump (31) or an ultrasonic processor booster pump (34) or a dissolved air pump (32) and a pneumatic regulating valve (21) of a water outlet of a packed bed; calculating the water inflow according to the hydraulic retention time of the test design, and adjusting the opening of a pneumatic adjusting valve (21) on a water inflow pipeline of the packed bed to enable the reading of an electromagnetic flowmeter (22) to be the calculated water inflow;
Step 4, circulating cooling water of an ozone generator (26) is turned on, ozone is started on an operation interface of a program control system, the ozone demand is calculated according to a gas-liquid ratio of a test design, and the calculated ozone demand is achieved by adjusting current, ozone addition rate and ozone gas flow;
Step 5, reading the COD, the O 3 concentration, the pH value and the conductivity value of the inlet water and the outlet water according to the test running time;
Step 6, when backwashing operation is carried out, opening a water inlet valve for supplementing backwash water at the tops of a first water production tank (19) and a second water production tank (20), and opening a backwash air valve arranged after the cold dryer (2); and setting the opening of a pneumatic regulating valve (21) behind the backwashing water pump (35) on an operation interface of the program control system, starting the backwashing water pump (35), and establishing a backwashing environment.
7. The method for testing an ozone heterogeneous catalytic oxidation integrated test platform according to claim 6, wherein the step 3 specifically comprises the following steps:
Step 3.1, when the aeration mode is ejector aeration, opening an air inlet valve, a water inlet valve and a water outlet valve of the ejector (30); starting a jet ejector booster pump (31) and adjusting inlet and outlet pressures of the jet ejector (30); all the valves related to the ultrasonic processor (33) and the dissolved air pump (32) are closed;
Step 3.2, when the aeration mode is that the ultrasonic processor is aerated, opening an air inlet valve, a water inlet valve and a water outlet valve of the ultrasonic processor (33); starting an ultrasonic processor booster pump (34) and adjusting inlet and outlet pressures of an ultrasonic processor (33); all the valves related to the ejector (30) and the dissolved air pump (32) are closed;
Step 3.3, when the aeration mode is aeration of the dissolved air pump (32), opening an air inlet valve, a water inlet valve and a water outlet valve of the dissolved air pump (32); starting a dissolved air pump (32), and adjusting the inlet and outlet pressure of the dissolved air pump (32); closing all the valves related to the ejector (30) and the ultrasonic processor (33);
Step 3.4, when the operation mode is selected to be series connection, opening a pneumatic control valve (21) on a pipeline between a water outlet (11) of the first packed bed (15) and a water inlet lifting pump (18) in front of the second packed bed (16); closing a pneumatic regulating valve (21) on a pipeline between a water outlet (11) of the first packed bed (15) and a first water production tank (19), and taking the water outlet of the first packed bed (15) as the water inlet of a second packed bed (16);
3.5, closing a pneumatic regulating valve (21) on a pipeline between a water outlet (11) of the first packed bed (15) and a second water inlet lifting pump (18) in front of the second packed bed (16) when the operation mode is selected to be parallel; opening a pneumatic control valve (21) on a pipeline between a water outlet (11) of the first packed bed (15) and the first water producing tank (19), and enabling water discharged from the first packed bed (15) and the second packed bed (16) to enter the first water producing tank (19) and the second water producing tank (20) respectively.
8. The test method of the ozone heterogeneous catalytic oxidation integrated test platform according to claim 6, wherein the test method comprises the following steps: the catalyst filler in the step 1 is an aluminum-based catalyst, an activated carbon-based catalyst or a ceramic-based catalyst; the time for purging the machine and piping with oxygen is 30-60 minutes.
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| CN213924176U (en) * | 2020-11-03 | 2021-08-10 | 浙江浙能技术研究院有限公司 | Ozone heterogeneous catalytic oxidation comprehensive test platform |
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