CN213924176U - Ozone heterogeneous catalytic oxidation comprehensive test platform - Google Patents
Ozone heterogeneous catalytic oxidation comprehensive test platform Download PDFInfo
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- CN213924176U CN213924176U CN202022504853.2U CN202022504853U CN213924176U CN 213924176 U CN213924176 U CN 213924176U CN 202022504853 U CN202022504853 U CN 202022504853U CN 213924176 U CN213924176 U CN 213924176U
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Abstract
The utility model relates to an ozone heterogeneous catalytic oxidation comprehensive test platform, include: the system 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 at the bottom of the packed bed through a pipeline, the top of the packed bed is connected with a water outlet system, the ozone system is divided into two paths and is respectively connected with two sets of aeration systems through gas pipelines, 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 utility model has the advantages that: the ozone heterogeneous catalytic oxidation comprehensive test platform provided by the utility model is provided with the packed bed, which can compare the treatment effect of different operation modes on the wastewater; a PLC system is arranged for reading and storing data; the comprehensive test platform is visual, has the functions of alarming, interlocking protection and the like, and ensures safe, reliable and automatic operation of the system.
Description
Technical Field
The utility model relates to a sewage treatment technical field especially relates to an ozone heterogeneous catalytic oxidation comprehensive test platform.
Background
Many industrial waste water has the problems of complex components, high organic matter concentration, difficult biodegradation and the like, and the catalytic ozonation technology is widely concerned and applied as a novel technology in advanced treatment technology. The catalytic oxidation of ozone promotes the decomposition of ozone to generate hydroxyl free radicals with higher oxidation potential by introducing a catalyst, and the hydroxyl free radicals generate free radical chain reaction to decompose organic matters which are difficult to degrade in water, so that the ozone utilization rate is improved, the treatment efficiency is obviously improved, wherein the catalyst for the heterogeneous catalytic oxidation of ozone is in a solid form, is easy to separate from water, can be repeatedly used, and has low post-treatment cost, so that the research and application of the heterogeneous catalytic oxidation of ozone become hot spots.
The main influences on the oxidation performance of the ozone heterogeneous catalysis mainly comprise the types of catalysts, the aeration mode, the gas-liquid ratio and the like. The currently developed ozone catalytic oxidation equipment generally only has one aeration mode, can not compare the dissolved air efficiency and the ozone utilization rate of different aeration modes, the operation mode is generally a single-stage or multi-stage series-connection tank, the multi-stage series-connection tank simply collects the wastewater treated by the previous stage and the waste gas containing ozone to enter the next stage, the wastewater treatment efficiency is low, and the operation mode that a plurality of reaction tanks can not only be connected in series but also can be switched into parallel cannot be realized. Therefore, the ozone heterogeneous catalytic oxidation comprehensive test platform with multiple aeration modes and series-parallel operation modes has important significance.
SUMMERY OF THE UTILITY MODEL
The utility model aims to overcome the defects in the prior art and provide an ozone heterogeneous catalytic oxidation comprehensive test platform and a test method.
The ozone heterogeneous catalytic oxidation comprehensive test platform comprises: the system 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 at the bottom of the packed bed through a pipeline, the top of the packed bed is connected with a water outlet system, the ozone system is divided into two paths and is respectively connected with two sets of aeration systems through gas pipelines, 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 drying machine is connected with the air compressor through a pipeline, and a manual valve is arranged on the pipeline between the cold drying machine 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 starting and stopping of the water inlet lift pump I, the water inlet lift 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 regulating valve; the program control system (PLC) is used for adjusting the opening degrees of the first water inlet lift pump and the second water inlet lift pump; the touch screen is used for realizing a process flow chart, setting all parameters and acquiring and displaying data, and can read and store historical data; parameters monitored and controlled include, but are not limited to, O3Concentration, pressure, flow, COD, pH, conductivity, etc.; the program control system can set and modify relevant process parameters and alarm limits according to requirements; the instrument operator can directly operate the instrument according to the traditional instrument using method; and when the related parameters exceed the preset upper limit, timely sending out an alarm signal.
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 gap 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 formed in the lower portion of one side face of the packed bed body, a manhole is also formed in the upper portion of the side face, and a sight glass is arranged on each manhole; the top of the packed bed is provided with a water outlet, an exhaust port, 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 on 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 on 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 in 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 packed bed base is provided with four support legs which are respectively welded on two mutually vertical supports; the water distribution device comprises a porous plate and a water cap, and 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 comprise: the system comprises a raw water tank, a water inlet lift pump I, a water inlet lift pump II, a production water tank I and a production water tank II; the bottom of the original water tank is provided with a water outlet, and a manual valve is arranged at the water outlet; the bottom of the original water tank is provided with a water outlet, and a drainage pipeline behind the water outlet is provided with a manual valve; a liquid level meter is arranged on the side surface of the raw water tank, 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 raw water tank is provided with a water inlet, the water inlet is provided with a manual valve, and the water inlet is connected with an external waste water pipeline; the water outlet of the raw water tank is divided into two paths which are respectively connected with a first water inlet lift pump and a first water inlet lift pump; a manual valve is arranged on a pipeline between the first water inlet lift pump and the water outlet of the raw water tank, the first water inlet lift 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 lift 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 raw water tank, the water inlet lifting pump is connected with the water inlet of the packed bed II, and the manual valve is arranged on the pipeline between the water inlet lifting pump and the water inlet of the packed bed II; water outlets are formed in the bottoms of the first production water tank and the second production water tank, and manual valves are arranged at the water outlets; aeration discs are arranged at the bottoms of the first water production tank and the second water production tank, aeration air inlets are arranged at the bottoms of the first water production tank and the second water production tank, and the air inlets are connected with a cold dryer through air pipelines; the bottoms of the first water production tank and the second water production tank are provided with water outlets, and a manual valve is arranged on a drainage pipeline behind the water outlets; liquid level meters are arranged on two sides of the first water production tank and the second water production tank, and an online pH meter, an online conductivity meter and an online COD measuring instrument are arranged in the first water production tank and the second water production tank; the top parts of the first production water tank and the second production water tank are provided with backwashing water replenishing water inlets; the water outlet pipeline of the packed bed I is divided into two paths which are respectively connected with a production water tank I and a water inlet lift pump II; the water outlet of the packed bed II is connected with a production water tank II; pneumatic regulating 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 regulating valves, the pneumatic regulating valves are connected with the cold dryer through pipelines, and one-way check valves are arranged on the connecting pipelines; probes of an online pH meter, an online conductivity meter and an online COD measuring instrument in the raw water tank, the first production water tank and the second production water 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 a gas mass flowmeter; the gas source is connected with an oxygen gas storage tank, the oxygen gas storage tank is connected with an ozone generator, and the outlet of the ozone generator is connected with an online ozone concentration detector; a manual valve is arranged in front of the oxygen gas storage tank, and a manual valve is arranged between the oxygen gas 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 respectively connected with exhaust ports on the first packed bed and the second packed bed 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 comprises: the ultrasonic jet device comprises an ejector, an ejector booster pump, a dissolved air pump, an ultrasonic processor and an ultrasonic processor booster pump; aeration is mainly divided into three forms: the jet aerator is used for aeration, the dissolved air pump is used for aeration, the ultrasonic aeration is carried out, the air outlet pipeline of the ozone generator is divided into three paths after being provided with a one-way check valve, the three paths are respectively connected with the jet aerator, the dissolved air pump and the air inlet end of the ultrasonic processor, and each path of pipeline is provided with a manual valve; the pipeline behind the upper circulating water gap of the first packed bed and the second packed bed is divided into three paths which are respectively connected with the ejector booster pump, the water absorption end of the dissolved air pump and the ultrasonic processor booster pump, and each path of pipeline is provided with a manual valve; the jet device booster pump is connected with the water suction end of the jet device, a bypass is additionally arranged on the jet device, and a manual valve is arranged on the bypass; the booster pump of the ultrasonic processor is connected with the water inlet end of the ultrasonic processor, and the outlet pipelines of the ejector, the dissolved air pump and the ultrasonic processor are converged and then are respectively connected with the aeration ports on the first packed bed and the second packed bed.
Preferably, a backwashing water pump is arranged in the backwashing system; the air compressor provides backwash gas, and an air outlet pipeline of the cold dryer is divided into two paths to be respectively connected with water inlets of the first packed bed and the second packed bed; the first water production tank and the second water production tank are used as a backwash water inlet tank, the water outlet pipelines of the first water production tank and the second water production tank are converged in one way and connected with a backwash water pump, the backwash water pump is connected with a water inlet of a packed bed, and a pneumatic regulating valve and an electromagnetic flowmeter are arranged on a 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 surface 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 utility model has the advantages that: the ozone heterogeneous catalytic oxidation comprehensive test platform provided by the utility model is provided with the packed bed, which can compare the treatment effect of different operation modes on the wastewater; a PLC system is arranged for reading and storing data; the comprehensive test platform is visual, has the functions of alarming, interlocking protection and the like, and ensures safe, reliable and automatic operation of the 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 structural view 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;
description of reference numerals: the system comprises an air compressor 1, a cold dryer 2, a raw water tank 3, a water inlet 4, an aeration opening 5, a water discharge opening 6, a circulating water opening 7, a water distribution device 8, a manhole 9, a sight glass 10, a water outlet 11, an exhaust opening 12, a bidirectional breather valve 13, a filter screen 14, a first packed bed 15, a second packed bed 16, a first water inlet lift pump 17, a second water inlet lift pump 18, a first water production tank 19, a second water production tank 20, a pneumatic regulating valve 21, an electromagnetic flowmeter 22, a one-way check valve 23, an aeration disc 24, an oxygen storage tank 25, an ozone generator 26, an ozone tail gas destructor 27, an online ozone concentration detector 28, a gas mass flowmeter 29, an ejector 30, an ejector booster pump 31, a dissolved air pump 32, an ultrasonic processor 33, an ultrasonic processor 34, a backwashing water pump 35 and a packed bed base.
Detailed Description
The present invention will be further described with reference to the following examples. The following description of the embodiments is merely provided to aid in understanding the invention. It should be noted that, for those skilled in the art, the present invention can be modified in several ways without departing from the principle of the present invention, and these modifications and modifications also fall into the protection scope of the claims of the present invention.
An ozone heterogeneous catalytic oxidation comprehensive test platform is shown in figure 1 and comprises: the system 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 a water outlet system, the ozone system is divided into two paths and is respectively connected with two sets of aeration systems through gas pipelines, 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 water inlet lift pump I17, the water inlet lift pump II 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 regulating valve 21; the program control system (PLC) is used for increasing the opening degrees of the first water inlet lift pump 17 and the second water inlet lift pump 18; the touch screen is used for realizing a process flow chart, setting all parameters and acquiring and displaying dataAnd can read and store historical data; parameters monitored and controlled include, but are not limited to, O3Concentration, pressure, flow, COD, pH, conductivity, etc.; the program control system can set and modify relevant process parameters and alarm limits according to requirements; the instrument operator can directly operate the instrument according to the traditional instrument using method; and when the related parameters exceed the preset upper limit, timely sending out an alarm signal.
The schematic structure 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 gap 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 water and air inflow of the bed body is arranged in the bottom of the packed bed; a packing layer is arranged in the bed body of the packed bed and is positioned above the water distribution device 8; two adjacent manholes 9 are formed in the lower portion of one side face of the packed bed body, one manhole 9 is also formed in the upper portion of the side face, 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 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 both provided with a filter screen 14; the whole packed bed is cylindrical, the circulating water gap 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 on 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 in 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 is provided with four support legs which are respectively welded on two mutually vertical supports; 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 and the like.
The water inlet system and the water outlet system comprise: the system comprises a raw water tank 3, a water inlet lift pump I17, a water inlet lift pump II 18, a water production tank I19 and a water production tank II 20; the bottom of the original water tank 3 is provided with a water outlet, and a manual valve is arranged at the water outlet; the bottom of the original water tank 3 is provided with a water outlet, and a drainage pipeline behind the water outlet is provided with a manual valve; a liquid level meter is arranged on the side surface of the raw water tank 3, and an online pH meter, an online conductivity meter and an online COD measuring instrument are arranged in the raw water tank 3; 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 raw water tank 3 is divided into two paths which are respectively connected with a first water inlet lift pump 17 and a first water inlet lift pump 18; a manual valve is arranged on a pipeline between the first water inlet lift pump 17 and the water outlet of the raw water tank 3, the first water inlet lift 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 a pipeline between the first water inlet lift 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 raw water tank 3, the water inlet lifting pump 18 is connected with the water inlet 4 of the second packed bed 16, and a 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; water outlets are formed in the bottoms of the first production water tank 19 and the second production water tank 20, and manual valves are arranged at the water outlets; aeration discs 24 are arranged inside the bottoms of the first water production tank 19 and the second water production tank 20, aeration air inlets are arranged at the bottoms of the first water production tank 19 and the second water production tank 20, and the air inlets are connected with the cold drying machine 2 through air pipelines; the bottoms of the first water production tank 19 and the second water production tank 20 are provided with water outlets, and a manual valve is arranged on a drainage pipeline behind the water outlets; liquid level meters are arranged on the side surfaces of the first water production tank 19 and the second water production tank 20, and an online pH meter, an online conductivity meter and an online COD measuring instrument are arranged in the first water production tank 19 and the second water production tank 20; the tops of the first production water tank 19 and the second production water tank 20 are provided with backwashing water replenishing water inlets; the water outlet pipeline of the packed bed I15 is divided into two paths which are respectively connected with a production water tank I19 and a water inlet lift pump II 18; a water outlet 11 of the packed bed II 16 is connected with a production water tank II 20; pneumatic regulating valves 21 are respectively 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 respectively arranged on the pneumatic regulating valves 21, the pneumatic regulating valves 21 are respectively connected with the cold dryer 2 through pipelines, and one-way check valves 23 are also arranged on the connecting pipelines; 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 online ozone concentration detector 28 and a gas mass flowmeter 29; an 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 online ozone concentration detector 28; a manual valve is arranged in front of the oxygen gas storage tank 25, and a manual valve is arranged between the oxygen gas 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.
The aeration system comprises: an ejector 30, an ejector booster pump 31, a dissolved air pump 32, an ultrasonic processor 33 and an ultrasonic processor booster pump 34; aeration is mainly divided into three forms: the jet aerator is used for aeration, the dissolved air pump is used for aeration, the ultrasonic aeration is carried out, the air outlet pipeline of the ozone generator 26 is divided into three paths after the one-way check valve 23 is arranged on the air outlet pipeline, the three paths are respectively connected with the 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 behind the circulating water gap 7 on the first packed bed 15 and the second packed bed 16 are divided into three paths, and are respectively connected with the ejector booster pump 31, the water absorption end of the dissolved air pump 32 and the ultrasonic processor booster pump 34, and each pipeline is provided with a manual valve; the jet device booster pump 31 is connected with the water suction end of the jet device 30, a bypass is additionally arranged on the jet device 30, 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 the outlet pipelines of the ejector 30, the dissolved air pump 32 and the ultrasonic processor 33 are converged and then are respectively connected with the aeration ports 5 on the first packed bed 15 and the second packed bed 16.
A backwashing water pump 35 is arranged in the backwashing system; the air compressor 1 provides backwash gas, and an air outlet pipeline of the cold dryer 2 is divided into two paths to be respectively connected with water inlets 4 of a first packed bed 15 and a second packed bed 16; the first production water tank 19 and the second production water tank 20 are used as a backwash water inlet tank, water outlet pipelines of the first production water tank 19 and the second production water tank 20 are converged to one pipeline and connected with a backwash water pump 35, 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 a pipeline between the backwash water pump 35 and the packed bed water inlet 4.
The area of the sight glass 10 positioned on the rear side surface of the packed bed body is smaller than that of the manhole 9; the first packed bed 15 and the second packed bed 16 are made of stainless steel or organic glass.
As an embodiment, the test method of the ozone heterogeneous catalytic oxidation comprehensive test platform comprises the following steps:
respectively filling aluminum-based catalyst and carbon-based catalyst fillers into filler layers of the first filler bed and the second filler bed from a manhole at the upper part of the filler bed; 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 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 the oxygen gas storage tank, an ozone outlet valve, a gas mass flowmeter arranged on an ozone outlet pipeline and an air inlet valve of the ejector, and purging the machine and the pipeline for 30 minutes. And opening a front valve of a water inlet of the raw water tank to enable the raw water tank to intake water, and opening a valve at a water outlet of the raw water tank, two front valves of the water inlet lifting pumps, an air supply valve of the pneumatic regulating valve, and a water inlet valve and a water outlet valve of the ejector.
The cabinet enters an operation interface of a PLC system after power is supplied, the hydraulic retention time is 0.5 hour according to experimental design, the opening degree of a pneumatic regulating valve before two water inlet lifting pumps is set to be 40 percent respectively, a water inlet lifting pump I, a water inlet lifting pump II and two packed bed water outlet pneumatic valves are started in a clicking mode, so that the two packed beds start to feed water, the opening degree of the pneumatic regulating valve is adjusted according to actual operation conditions, the water inlet flow is displayed to be 0.8m3H is used as the reference value. The selected aeration mode is that the ejector aerates, an air inlet valve, an water inlet valve and a water outlet valve of the ejector are opened, a booster pump of the ejector is started, the pressure of an inlet and an outlet of the ejector is adjusted to be 0.050MPa, and related valves of the ultrasonic processor and the dissolved air pump are all closed. And selecting the operation mode of parallel connection, closing a pneumatic valve on a pipeline between a water outlet of the first packed bed and a water inlet lifting pump II of the second packed bed, opening a pneumatic valve on a pipeline between the water outlet of the first packed bed and a water production tank I, and enabling the effluent of the first packed bed and the effluent of the second packed bed to respectively enter the water production tank I and the water production tank II.
Opening circulating cooling water of an ozone generator, clicking on an operation interface of a PLC system to start ozone preparation, calculating ozone demand according to a gas-liquid ratio of 150mg/L of a test design, adjusting and adjusting the gas inlet pressure of the ozone generator to be 0.100-0.110MPa, the current of the ozone generator to be 4A, the ozone adding rate to be 71-77%, the total flow of ozone gas to be 3.0-3.2m3/h and the concentration of an ozone outlet to be 80mg/L so as to achieve the target ozone yield. During backwashing operation, a backwashing water replenishing port valve at the top of the water production tank, a backwashing water valve and a backwashing gas valve which are arranged behind the cold dryer are opened, a backwashing water pump pneumatic regulating valve is arranged on an operation interface of the PLC system, the opening degree of the backwashing water pump pneumatic regulating valve is 60%, the backwashing water pump is started, and a backwashing environment is established.
The test process collects the measured data of each sensor and instrument in real time, and the data collection control system is matched with a local control system and adopts PLC control and screen display and control. The operations of adjusting 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 backwashing water flow and backwashing gas flow of the backwashing system and the like can be controlled on site or automatically controlled through a PLC. Electromagnetic flowmeter, valve, water inlet and outlet COD and O3The concentration detector, the pH meter, the conductivity meter and the matched data acquisition module are provided with communication interfaces, signals of each sensor and each monitoring instrument can be transmitted to the PLC in real time, and control, management and analysis of the test device are completed through set logic.
The ozone heterogeneous catalytic oxidation comprehensive test platform provided by the utility model has a plurality of aeration modes, different aeration modes can be switched at will, and the influence of different aeration modes on the ozone utilization rate can be evaluated; the packed bed is arranged to realize two operation modes of series connection and parallel connection, and the treatment effect of different operation modes on the wastewater can be compared; the PLC system is provided with parameters such as inflow, ozone flow and gas-liquid ratio, the PLC system reads and stores multiple indexes such as COD, pH and conductivity of inlet and outlet water, the comprehensive test platform is visual, and the comprehensive test platform has the functions of alarming, interlocking protection and the like, and ensures safe, reliable and automatic operation of the system.
Claims (7)
1. The utility model provides an ozone heterogeneous catalytic oxidation comprehensive test platform which characterized in that includes: the system 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 a water outlet system, the ozone system is divided into two paths and is respectively connected with two sets of aeration systems through gas pipelines, 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.
2. The ozone heterogeneous catalytic oxidation comprehensive test platform according to claim 1, characterized in that: the packed bed comprises a first packed bed (15) and a second packed bed (16); 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 gap (7) is arranged on the side wall of the bottom of the packed bed; a water distribution device (8) for water and air inflow of the bed body is arranged at 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 both provided with a filter screen (14);
the whole packed bed is cylindrical, the circulating water port (7) is positioned at the bottom of the right side face of the packed bed, the manhole (9) and the sight glass (10) are positioned on the rear side face of the packed bed, the water inlet (4) is positioned at the bottom of the left side face of the packed bed, and the water outlet (11) is positioned at the top of the right side face 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 in 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 support legs which are respectively welded on two mutually vertical supports; the water distribution device (8) comprises a porous plate and a water cap.
3. The ozone heterogeneous catalytic oxidation comprehensive test platform according to claim 1, wherein the water inlet system and the water outlet system comprise: the system comprises a raw water tank (3), a first water inlet lift pump (17), a second water inlet lift 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 raw water tank (3), and a manual valve is arranged at the water outlet; the bottom of the original water tank (3) is provided with a water outlet, and a drainage pipeline behind the water outlet is provided with a manual valve; a liquid level meter is arranged on the side surface of the raw water tank (3), and an online pH meter, an online conductivity meter and an online COD measuring instrument are arranged in the raw water tank (3); 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 raw water tank (3) is divided into two paths which are respectively connected with a first water inlet lift pump (17) and a second water inlet lift pump (18); a manual valve is arranged on a pipeline between the first water inlet lift pump (17) and the water outlet of the raw water tank (3), the first water inlet lift 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 lift pump (17) and the water inlet (4) of the first packed bed (15); a manual valve is arranged on a pipeline between the second inlet lift pump (18) and the water outlet of the raw water tank (3), the second inlet lift pump (18) is connected with the water inlet (4) of the second packed bed (16), and the manual valve is arranged on the pipeline between the second inlet lift pump (18) and the water inlet (4) of the second packed bed (16);
water outlets are formed in the bottoms of the first water production tank (19) and the second water production tank (20), and manual valves are arranged at the water outlets; aeration discs (24) are arranged inside the bottoms of the first water production tank (19) and the second water production tank (20), aeration air inlets are formed in the bottoms of the first water production tank (19) and the second water production tank (20), and the air inlets are connected with the cold dryer (2) through air pipelines; the bottoms of the first water production tank (19) and the second water production tank (20) are provided with water outlets, and a manual valve is arranged on a drainage pipeline behind the water outlets; liquid level meters are arranged on the side surfaces of the first water production tank (19) and the second water production tank (20), and an online pH meter, an online conductivity meter and an online COD measuring instrument are arranged in the first water production tank (19) and the second water production tank (20); the tops of the first water production tank (19) and the second water production tank (20) are provided with backwashing water replenishing water inlets; the water outlet pipeline of the packed bed I (15) is divided into two paths which are respectively connected with a production water tank I (19) and a water inlet lift pump II (18); a water outlet (11) of the second packed bed (16) is connected with a second production water tank (20); pneumatic regulating valves (21) are respectively 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 respectively arranged on the pneumatic regulating valves (21), the pneumatic regulating valves (21) are respectively connected with the cold dryer (2) through pipelines, and one-way check valves (23) are also arranged on the connecting pipelines; probes of an online pH meter, an online conductivity meter and an online COD measuring instrument in the raw water tank (3), the first produced water tank (19) and the second produced water tank (20) are all positioned below the liquid level.
4. The ozone heterogeneous catalytic oxidation comprehensive test platform according to claim 1, characterized in that: 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); an 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 online 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 comprehensive test platform according to claim 1, wherein the aeration system comprises: 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 rear part of a one-way check valve (23) on an air outlet pipeline of the ozone generator (26) is divided into three paths which are respectively connected with an ejector (30), a dissolved air pump (32) and an air inlet end of an ultrasonic processor (33), and each pipeline is provided with a manual valve; the pipelines behind the circulating water gap (7) on the first packed bed (15) and the second packed bed (16) are divided into three paths, and are respectively connected with the ejector booster pump (31), the water absorption end of the dissolved air pump (32) and the ultrasonic processor booster pump (34), and each pipeline is provided with a manual valve; the jet device booster pump (31) is connected with the water suction end of the jet device (30), a bypass is additionally arranged on the jet device (30), 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 the outlet pipelines of the ejector (30), the dissolved air pump (32) and the ultrasonic processor (33) are converged and then are respectively connected with the aeration ports (5) on the first packed bed (15) and the second packed bed (16).
6. The ozone heterogeneous catalytic oxidation comprehensive test platform according to claim 1, characterized in that: a backwashing water pump (35) is arranged in the backwashing system; an air outlet pipeline of the cold dryer (2) is divided into two paths to be respectively connected with the water inlets (4) of the first packed bed (15) and the second packed bed (16); the water production tank I (19) and the water production tank II (20) are used as a backwash water inlet tank, water outlet pipelines of the water production tank I (19) and the water production tank II (20) are converged on one way and 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 regulating valve (21) and an electromagnetic flowmeter (22) are arranged on a pipeline between the backwash water pump (35) and the packed bed water inlet (4).
7. The ozone heterogeneous catalytic oxidation comprehensive test platform according to claim 2, characterized in that: the area of the sight glass (10) positioned on the rear side surface of the packed bed body is smaller than that of the manhole (9); the first packed bed (15) and the second packed bed (16) are made of stainless steel or organic glass.
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN112408576A (en) * | 2020-11-03 | 2021-02-26 | 浙江浙能技术研究院有限公司 | Ozone heterogeneous catalytic oxidation comprehensive test platform and test method |
| CN112408576B (en) * | 2020-11-03 | 2024-06-18 | 浙江浙能技术研究院有限公司 | Ozone heterogeneous catalytic oxidation comprehensive test platform and test method |
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