CN111589265A - Adsorption desorption catalytic oxidation control processing system - Google Patents
Adsorption desorption catalytic oxidation control processing system Download PDFInfo
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- CN111589265A CN111589265A CN202010314666.XA CN202010314666A CN111589265A CN 111589265 A CN111589265 A CN 111589265A CN 202010314666 A CN202010314666 A CN 202010314666A CN 111589265 A CN111589265 A CN 111589265A
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/02—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols by adsorption, e.g. preparative gas chromatography
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/30—Controlling by gas-analysis apparatus
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/34—Chemical or biological purification of waste gases
- B01D53/74—General processes for purification of waste gases; Apparatus or devices specially adapted therefor
- B01D53/86—Catalytic processes
- B01D53/8678—Removing components of undefined structure
- B01D53/8687—Organic components
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2253/00—Adsorbents used in seperation treatment of gases and vapours
- B01D2253/10—Inorganic adsorbents
- B01D2253/102—Carbon
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2257/00—Components to be removed
- B01D2257/70—Organic compounds not provided for in groups B01D2257/00 - B01D2257/602
- B01D2257/708—Volatile organic compounds V.O.C.'s
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2259/00—Type of treatment
- B01D2259/40—Further details for adsorption processes and devices
- B01D2259/40083—Regeneration of adsorbents in processes other than pressure or temperature swing adsorption
- B01D2259/40088—Regeneration of adsorbents in processes other than pressure or temperature swing adsorption by heating
- B01D2259/4009—Regeneration of adsorbents in processes other than pressure or temperature swing adsorption by heating using hot gas
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Abstract
The invention relates to the technical field of waste gas treatment, in particular to an adsorption, desorption and catalytic oxidation control treatment system which comprises a PLC (programmable logic controller) installed on a power distribution cabinet, a touch screen, water spraying equipment, a dry filter, an activated carbon box and a catalytic oxidation chamber, wherein the water spraying equipment is arranged at the gas input end of the dry filter, desorption valves, adsorption valves and VOCs (volatile organic compounds) concentration detection probes are arranged in activated carbon, the number of the activated carbon boxes is three, the three activated carbon boxes are connected in parallel at the output end of the dry filter through pipelines, a catalytic oxidation device is arranged in the catalytic oxidation chamber, and the catalytic oxidation device comprises a preheating power supply, a desorption fan and a fresh air supply fan. The invention can realize visual management in the adsorption, desorption and catalytic oxidation process, can realize the intelligent regeneration alternate process of the activated carbon compared with the traditional activated carbon adsorption process, has long service life and is suitable for popularization.
Description
Technical Field
The invention relates to the technical field of waste gas treatment, in particular to an adsorption, desorption, catalytic oxidation control and treatment system.
Background
A large amount of paint spraying waste gas is often generated in the workshop operation processes of chemical engineering, coating, furniture, printing, paint spraying and the like, the paint spraying waste gas contains benzene, toluene, xylene, ethyl acetate and non-methane total hydrocarbon organic gas pollutants, wherein the benzene has high volatility and is easy to diffuse when being exposed in the air, and acute and chronic benzene poisoning can be caused when people and animals inhale or skin contacts a large amount of benzene; toluene has strong stimulation effect, red blood cell count is reduced when the toluene is contacted, leucopenia and neutropenia can be caused, skin is degreased, skin is dried, chapped and infected secondarily, arrhythmia and myocardial damage can be caused by high-concentration toluene inhalation to cause sudden death, brain poisoning is caused by long-term inhalation, eyes are stimulated, metabolic acidosis can be caused, and liver, kidney and nervous system are affected; xylene is irritant, and steam with high concentration is anesthetic; ethyl acetate has an irritating odor, is volatile and flammable, and vapors can form explosive mixtures with air. The paint spraying waste gas containing a large amount of organic gas pollutants directly discharged into the air not only affects the health of workshop operation operators, but also pollutes the atmospheric environment, and can explode when the concentration is too high.
Adsorption technology is the most classical and commonly used gas purification technology and is one of the mainstream technologies for VOCS treatment in the industry at present. In the prior art, activated carbon is often used for adsorbing organic pollutants, and the activated carbon is widely applied to adsorbing and recovering organic gas due to the large specific surface area and the microporous structure. The principle of activated carbon adsorption is as follows: the solid surface of the active carbon has unbalanced and unsaturated molecular attraction or chemical strength, when the solid surface of the active carbon contacts with gas, the molecules of the gas are attracted, so that the molecules of the gas are condensed and kept on the solid surface, and organic pollutants are adsorbed to purify the waste gas. The adsorption method is mainly suitable for purifying low-concentration gaseous pollutants, and for high-concentration organic gases, the concentration of the organic gases is usually reduced by condensation and other processes, and then the organic gases are subjected to adsorption purification. Currently, researches on the adsorption of organic gases by activated carbon mainly focus on the prediction of adsorption balance, the modification of activated carbon materials and the influence of the physical and chemical properties of organic matters on the adsorption performance of activated carbon. However, the active carbon box of the existing VOCS treatment process has the following problems: the service life of the activated carbon is shortened due to the overlarge adsorption amount of the activated carbon, the adsorption amount is small or the adsorption function is lost after the activated carbon is used for a period of time, and the activated carbon is inconvenient to replace; when the concentration of the organic pollutants desorbed by the activated carbon at one time is too high, the pressure and the temperature in the adsorption box are too high, so that the explosion risk exists, and certain potential safety hazard exists.
Disclosure of Invention
The invention aims to solve the defects of short service life and large potential safety hazard of an activated carbon box of the existing VOCS treatment process in the prior art, and provides an adsorption, desorption, catalytic oxidation control and treatment system.
In order to achieve the purpose, the invention adopts the following technical scheme:
the design is an adsorption and desorption catalytic oxidation control treatment system, which comprises a PLC (programmable logic controller) installed on a power distribution cabinet, a touch screen, and water spraying equipment, a dry filter, an activated carbon box and a catalytic oxidation chamber, wherein the water spraying equipment, the dry filter, the activated carbon box and the catalytic oxidation chamber are used for realizing activated carbon adsorption, hot gas flow desorption and catalytic oxidation processes, the water spraying equipment is arranged at the gas input end of the dry filter, the water spraying equipment is provided with a control valve for controlling water flow, the activated carbon box is internally provided with a desorption valve, an adsorption valve and a VOCs (volatile organic compounds) concentration detection probe, the activated carbon box is three and three, the activated carbon box is connected in parallel with the output end of the dry filter through a pipeline, the gas output end of the activated carbon box is communicated with the catalytic oxidation chamber through a pipeline, the adsorption valve is arranged on the communicated pipeline of the activated carbon box and the, catalytic oxidation device is including preheating power, desorption fan and tonifying new trend fan, the gas input of desorption fan pass through the pipeline with the desorption valve of activated carbon box is connected, the gas output of desorption fan with catalytic oxidation room intercommunication sets up.
Preferably, the gaseous process that contains VOCs water spraying apparatus carries out the prefiltration, pass through dry filter, the operation is adsorbed in getting into two active carbon adsorption casees that have opened the adsorption valve at last, the active carbon uses after a period, after having adsorbed a certain amount of organic waste gas, can reduce or lose adsorption efficiency, VOCs concentration test probe of dress at this moment in the active carbon case detects two desorption valves that open on the active carbon case when this active carbon case concentration reaches the settlement high limit value, close two adsorption valves, start to open the active carbon in the active carbon case that the adsorption valve on another active carbon case reaches the setting value to the concentration simultaneously and need the desorption regeneration, the active carbon resumes adsorption function and continues to use again after the regeneration.
Preferably, during regeneration, a preheating power supply, a desorption fan and a fresh air supplement fan of the catalytic oxidation device are automatically started, air is preheated after the preheating power supply is started, preheated gas is sent into the activated carbon box, after activated carbon in the activated carbon box is heated, organic waste gas adsorbed by the activated carbon volatilizes, enters the catalytic oxidation chamber through the fan, is further heated, is oxidized and decomposed under the action of a catalyst, and is converted into CO2 and H20.
Preferably, the exhaust port of the catalytic oxidation chamber is connected with a heat exchange system, and when the temperature of the clean gas exhausted from the catalytic oxidation chamber exceeds 100 ℃, the waste heat recovery operation is carried out.
Preferably, dry filter, activated carbon box, catalytic oxidation device's exit all are equipped with wind pressure difference changer (PCM620), activated carbon box exit is equipped with the control by temperature change probe, the installation is equipped with the waste gas valve between activated carbon box and dry filter's the intercommunication pipeline, activated carbon box's inside still installation is equipped with the cooling shower nozzle that has the fire control water valve, all adorn angle analog valve before catalytic oxidation equipment export and the catalytic oxidation equipment entry, arbitrary one control by temperature change probe detects the temperature and closes activated carbon box's waste gas valve and open the fire control water valve immediately when exceeding the setting value, sprays water to activated carbon box, prevents that high temperature from catching fire.
Preferably, control valve, desorption valve, adsorption valve, VOCs concentration detection probe, preheating power supply, desorption fan, benefit new trend fan, pressure difference transmitter, temperature control probe, fire water valve, exhaust valve and take the valve of angle analog all through the wire with PLC controller electric connection, the PLC controller passes through switch board external power supply, PLC and touch-sensitive screen are equipped with thing networking module through the wire connection, pressure difference transmitter, temperature control probe and angle analog valve can show actual value on the touch-sensitive screen, and acousto-optic warning is immediately realized when exceeding the setting value to through multiple modes such as SMS, little letter, pronunciation, very first time propelling movement fault state, in time grasp equipment running state, the user can realize equipment data monitoring through webpage or cell-phone APP, and the very first time knows equipment running state, Parameters are modified, and the history of the storage device can be inquired.
The adsorption desorption catalytic oxidation control treatment system provided by the invention has the beneficial effects that: the system can realize visual management in the adsorption, desorption and catalytic oxidation process, has high safety factor and controllable risk, can realize the intelligent regeneration alternate process of the activated carbon compared with the traditional activated carbon adsorption process, has long service life and certain economic benefit.
Drawings
FIG. 1 is a schematic diagram of the circuit logic control of the PLC proposed in the present invention;
FIG. 2 is a schematic diagram of a logic control of a module circuit of the power distribution cabinet proposed in the present invention;
fig. 3 is a schematic diagram of a control circuit of the power distribution cabinet proposed in the present invention;
fig. 4 is a schematic circuit diagram of an adsorption, desorption, catalytic oxidation control processing system according to the present invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments.
Referring to fig. 1-4, an adsorption-desorption catalytic oxidation control processing system comprises a PLC controller installed on a power distribution cabinet, a touch screen, water spraying equipment for realizing activated carbon adsorption, thermal current desorption and catalytic oxidation processes, a dry filter, three activated carbon boxes and a catalytic oxidation chamber, wherein the water spraying equipment is arranged at the gas input end of the dry filter, the water spraying equipment is provided with a control valve for controlling water flow, the activated carbon is internally provided with a desorption valve, an adsorption valve and a VOCs concentration detection probe, the three activated carbon boxes are connected in parallel at the output end of the dry filter through a pipeline, the gas output end of the activated carbon box is communicated with the catalytic oxidation chamber through a pipeline, the adsorption valve is arranged on a communication pipeline between the activated carbon box and the catalytic oxidation chamber, a catalytic oxidation device and a catalyst are arranged in the catalytic oxidation chamber, and the catalytic oxidation device comprises a preheating power supply, a preheating power, Desorption fan and benefit new trend fan, the gaseous input of desorption fan passes through the pipeline and is connected with the desorption valve of active carbon case, and the gaseous output end and the catalytic oxidation room intercommunication setting of desorption fan.
The gas containing VOCs is primarily filtered by water spraying equipment, then passes through a dry filter, finally enters two activated carbon adsorption boxes with opened adsorption valves for adsorption operation, after the activated carbon is used for a period of time, a certain amount of organic waste gas is adsorbed, the adsorption capacity is reduced or lost, at the moment, when a VOCs concentration detection probe arranged in the activated carbon box detects that the concentration of the activated carbon box reaches a set high limit value, two desorption valves on the activated carbon box are opened, the two adsorption valves are closed, the adsorption valve on the other activated carbon box is started and opened, the activated carbon in the activated carbon box with the concentration reaching the set value needs desorption and regeneration, the activated carbon after regeneration resumes the adsorption function for continuous use, when regeneration, a preheating power supply, a desorption fan and a fresh air supply fan of a catalytic oxidation device are automatically started, air is preheated after the preheating power supply is started, and the preheated gas is sent into the activated carbon box, after the activated carbon in the activated carbon box is heated, organic waste gas adsorbed by the activated carbon volatilizes, enters the catalytic oxidation chamber through the fan, is further heated, is subjected to oxidative decomposition under the action of a catalyst and is converted into CO2 and H20, a discharge port of the catalytic oxidation chamber is connected with a heat exchange system, and when the temperature of clean gas discharged from the catalytic oxidation chamber exceeds 100 ℃, waste heat recovery operation is carried out.
The inlet and outlet of the dry filter, the activated carbon box and the catalytic oxidation device are respectively provided with a wind pressure difference transmitter (PCM620), the inlet and outlet of the activated carbon box are provided with a temperature control probe, a waste gas valve is arranged between the communicated pipelines of the activated carbon box and the dry filter, a cooling spray head with a fire water valve is also arranged in the activated carbon box, angle analog quantity valves are arranged in front of the outlet of the catalytic oxidation device and the inlet of the catalytic oxidation device, when any temperature control probe detects that the temperature exceeds a set value, the waste gas valve of the activated carbon box is immediately closed and the fire water valve is opened, water is sprayed to the activated carbon box, and high-temperature ignition is prevented.
The touch screen, a control valve of the water spraying equipment, a desorption valve, an adsorption valve, a VOCs concentration detection probe, a preheating power supply, a desorption fan, a fresh air supply fan, an air pressure difference transmitter, a temperature control probe, a fire water valve, a waste gas valve and a valve with angle analog quantity are all electrically connected with the PLC controller through wires, the PLC controller is externally connected with the power supply through a power distribution cabinet, the PLC and the touch screen are connected with an Internet of things module through wires, the air pressure difference transmitter, the temperature control probe and the angle analog quantity valve can display actual values on the touch screen, when the set value is exceeded, sound and light alarm is immediately carried out, the fault state is pushed at the first time through various modes such as short messages, WeChat and voice, the running state of the equipment is timely mastered, a user can realize equipment data monitoring through a webpage or a mobile phone APP, the running state of the equipment, parameters are modified and the like are known at the first time, and meanwhile the history of the equipment can be inquired and stored.
The system can realize visual management in the adsorption, desorption and catalytic oxidation process, has high safety factor and controllable risk, can realize the intelligent regeneration alternate process of the activated carbon compared with the traditional activated carbon adsorption process, has long service life and certain economic benefit.
The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art should be considered to be within the technical scope of the present invention, and the technical solutions and the inventive concepts thereof according to the present invention should be equivalent or changed within the scope of the present invention.
Claims (6)
1. The utility model provides an adsorb desorption catalytic oxidation control processing system, is including installing PLC controller, touch-sensitive screen on the switch board and being used for realizing water spraying equipment, dry-type filter, activated carbon box and the catalytic oxidation room of activated carbon adsorption, hot gas flow desorption and catalytic oxidation technology, its characterized in that, water spraying equipment sets up the gas input end of dry-type filter, be equipped with the control valve that is used for controlling rivers on the water spraying equipment, all be equipped with desorption valve, adsorption valve and VOCs concentration detection probe in the activated carbon, the activated carbon box is three, three for quantity the activated carbon box passes through the pipeline and connects in parallel the output of dry-type filter, the gas output end of activated carbon box pass through the pipeline with the catalytic oxidation room intercommunication, the adsorption valve sets up on the communicating pipe of activated carbon box and catalytic oxidation room, be equipped with catalytic oxidation device and catalyst in the catalytic oxidation room, catalytic oxidation device is including preheating power, desorption fan and tonifying new trend fan, the gas input of desorption fan pass through the pipeline with the desorption valve of activated carbon box is connected, the gas output of desorption fan with catalytic oxidation room intercommunication sets up.
2. The system according to claim 1, wherein the gas containing VOCs is initially filtered by the water spraying device, passes through the dry filter, and finally enters the two activated carbon adsorption tanks with the adsorption valves opened for adsorption, after the activated carbon is used for a period of time, after adsorbing a certain amount of organic waste gas, the adsorption capacity is reduced or lost, at this time, when the concentration of the activated carbon tank reaches a set high limit value, the two desorption valves on the activated carbon tank are opened by the VOCs concentration detection probe installed in the activated carbon tank, the two adsorption valves are closed, the adsorption valve on the other activated carbon tank is started to be opened, the activated carbon in the activated carbon tank with the concentration reaching the set value needs to be desorbed and regenerated, and after regeneration, the activated carbon recovers the adsorption function to be used again.
3. The system of claim 2, wherein during regeneration, the preheating power supply, the desorption fan and the fresh air supply fan of the catalytic oxidation device are automatically started, the preheating power supply preheats air after being started, the preheated air is fed into the activated carbon box, and after the activated carbon in the activated carbon box is heated, organic waste gas adsorbed by the activated carbon is volatilized, enters the catalytic oxidation chamber through the fan, is further heated, is oxidized and decomposed under the action of a catalyst, and is converted into CO2 and H20.
4. The system according to claim 3, wherein the exhaust port of the catalytic oxidation chamber is connected to a heat exchange system, and when the temperature of the clean gas exhausted from the catalytic oxidation chamber exceeds 100 ℃, the system performs waste heat recovery.
5. The system according to claim 1, wherein the dry filter, the activated carbon box and the catalytic oxidation device are provided with air pressure difference transmitters (PCM620) at the inlet and outlet, the activated carbon box is provided with temperature control probes at the inlet and outlet, an exhaust valve is arranged between the activated carbon box and the dry filter, a cooling spray head with a fire-fighting water valve is further arranged in the activated carbon box, angle analog valves are arranged in front of the catalytic oxidation device outlet and the catalytic oxidation device inlet, and when any one of the temperature control probes detects that the temperature exceeds a set value, the exhaust valve of the activated carbon box is immediately closed and the fire-fighting water valve is opened to spray water to the activated carbon box, thereby preventing high-temperature ignition.
6. The system of claims 1-5, wherein the touch screen, the control valve of the water spraying device, the desorption valve, the adsorption valve, the VOCs concentration detection probe, the preheating power supply, the desorption fan, the fresh air supply fan, the wind pressure difference transmitter, the temperature control probe, the fire water valve, the waste gas valve and the valve with the angle analog quantity are all electrically connected with the PLC through wires, the PLC is externally connected with the power supply through the power distribution cabinet, the PLC and the touch screen are connected with the Internet of things module through wires, the wind pressure difference transmitter, the temperature control probe and the angle analog quantity valve can display actual values on the touch screen, sound and light alarm can be immediately given when the actual values exceed set values, and the fault state can be immediately pushed through short messages, WeChat, voice and other modes to grasp the running state of the device in time, the user can realize equipment data monitoring through webpage or cell-phone APP, knows equipment running state, modification parameter etc. the very first time, also can inquire the history of saving equipment simultaneously.
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| CN202010314666.XA CN111589265A (en) | 2020-04-21 | 2020-04-21 | Adsorption desorption catalytic oxidation control processing system |
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| CN202010314666.XA CN111589265A (en) | 2020-04-21 | 2020-04-21 | Adsorption desorption catalytic oxidation control processing system |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112675703A (en) * | 2021-01-20 | 2021-04-20 | 河北宏泰专用汽车有限公司 | Efficient volatile organic compound treatment system and method |
| CN114660985A (en) * | 2021-08-16 | 2022-06-24 | 浙江锌芯友好环境材料科技有限公司 | Automatic control system and control method for continuous odor treatment system |
Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
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