CN215574958U - Multistage processing system of tail gas - Google Patents
Multistage processing system of tail gas Download PDFInfo
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- CN215574958U CN215574958U CN202121419562.1U CN202121419562U CN215574958U CN 215574958 U CN215574958 U CN 215574958U CN 202121419562 U CN202121419562 U CN 202121419562U CN 215574958 U CN215574958 U CN 215574958U
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Abstract
The utility model provides a tail gas multistage processing system, includes dust collecting equipment, combustion apparatus, cooling device, gas-liquid separation equipment, carbon adsorption equipment, air exhauster, aiutage, effluent treatment plant and monitoring auto-change over device, monitors organic matter concentration in the tail gas, temperature, humidity and particulate matter concentration, and the controller carries out analysis and judgement according to the priority order to through the delivery route of executor control tail gas, according to the delivery route of tail gas, be in the treatment facility on the tail gas delivery route and handle tail gas. The problems of single process mode, poor flexibility and high economic cost of the existing thermal desorption tail gas treatment technology are solved.
Description
Technical Field
The utility model relates to the technical field of soil remediation, in particular to a thermal desorption tail gas multistage treatment system based on monitoring switching.
Background
As an efficient soil remediation technology, thermal desorption is a physical method for transferring pollutants from soil to a gas phase through heat exchange in situ or ex situ, and introducing gaseous pollutants into a tail gas treatment system for further treatment through in situ extraction or an induced draft fan so as to achieve standard emission. The thermal desorption tail gas treatment process is an organic combination of treatment technologies such as a condensation method, an adsorption method, an incineration method and the like in the traditional industrial waste gas. The condensation method liquefies gaseous pollutants by cooling or pressurizing, and is a pretreatment step of high-concentration organic tail gas; the adsorption method generally uses porous adsorption materials such as activated carbon and the like to adsorb and fix pollutants, and is a key treatment technology for adsorbing uncondensed organic gas; the combustion method utilizes the combustibility of organic pollutants in the tail gas to combust and purify the tail gas to generate carbon dioxide, water and other harmless substances. In addition to the above core processes, thermal desorption tail gas treatment also requires the combination of dust removal, defogging, washing, wastewater treatment, and the like, which makes the economic cost of a tail gas treatment system capable of operating only in a single mode higher.
The thermal desorption tail gas generally contains gaseous pollutants, water, solid particles and the like, but is affected by different soil properties, pollutant types and different heating conditions, and the thermal desorption tail gas has obvious characteristic differences in aspects of temperature, complexity of organic components, flow rate and the like. Even if the same thermal desorption technology is adopted, the characteristic state of the tail gas fluctuates at different restoration stages. In addition, most of the current devices only have on-line monitoring of temperature and flow, and the parameter index is single. In summary, it is difficult for the existing exhaust gas treatment system to adjust the operation mode in time according to the monitoring feedback.
Based on the above, it is urgently needed to develop a high-efficient intelligent tail gas multistage processing system with flexible process mode and strong monitoring function, so that the high-efficient and accurate purification of thermal desorption tail gas is realized, and the practical significance is very strong.
SUMMERY OF THE UTILITY MODEL
The utility model aims to provide a tail gas multistage treatment system and a tail gas multistage treatment method, and aims to solve the problems of single process mode, poor flexibility and high economic cost of the existing thermal desorption tail gas treatment technology.
In order to achieve the purpose, the utility model adopts the following technical scheme:
a tail gas multistage treatment system comprises dust removal equipment, combustion equipment, cooling equipment, gas-liquid separation equipment, carbon adsorption equipment, an exhaust fan, an exhaust funnel, waste water treatment equipment and a monitoring switching device;
the dust removing equipment is connected with the tail gas connecting air pipe;
an air inlet pipe of the combustion equipment is connected with the tail gas connecting air pipe, and the combustion equipment is connected with the dust removal equipment through the connecting air pipe;
an air inlet pipe of the cooling equipment is connected with the tail gas connecting air pipe, and the cooling equipment is also connected with the dust removal equipment and the combustion equipment through connecting air pipes;
the gas-liquid separation equipment is connected with the cooling equipment through a connecting air pipe;
the carbon adsorption equipment is connected with the gas-liquid separation equipment through a connecting air pipe;
the exhaust fan is connected with the air outlets of the dust removal equipment, the combustion equipment and the carbon adsorption equipment;
the exhaust cylinder is connected with the exhaust fan and used for discharging the gas which reaches the standard after being processed;
the wastewater treatment equipment is connected with the cooling equipment and the water outlet of the gas-liquid separation equipment;
the monitoring switching device comprises monitors, controllers and actuators, wherein the monitors are arranged at the positions of tail gas connecting air pipes, the monitors monitor tail gas and transmit monitoring signals to the controllers, the controllers analyze the monitoring signals and send execution signals to the actuators, the actuators are provided with a plurality of actuators, the actuators are respectively positioned on the tail gas connecting air pipes and the tail gas connecting air pipes, and the actuators execute control instructions sent by the controllers;
correspondingly, the exhaust fan is respectively connected with the air outlets of the dust removal equipment, the combustion equipment and the carbon adsorption equipment through an overrunning pipeline provided with a plurality of branches;
correspondingly, the wastewater treatment equipment is respectively connected with the water outlets of the cooling equipment and the gas-liquid separation equipment through an overrunning pipeline provided with a plurality of branches;
correspondingly, the wastewater treatment device comprises a flocculation tank and an oxidation tank;
correspondingly, the monitor comprises a VOCs monitor, a temperature and humidity transmitter and a particulate matter detector and is used for monitoring the concentration, the temperature, the humidity and the concentration of the particulate matter of the volatile organic matter in the tail gas conveyed by the tail gas connecting air pipe;
correspondingly, the executor includes the blast gate, the blast gate be provided with 9, set up respectively in on the tail gas connecting air pipe dust collecting equipment combustion apparatus with on cooling device's the air-supply line and dust collecting equipment with combustion apparatus with cooling device dust collecting equipment with cooling device and gas-liquid separation equipment with on the connecting air pipe of carbon adsorption equipment.
When the concentration of the volatile organic compounds in the tail gas is monitored to be greater than or equal to a set value, the temperature and the humidity are less than the set value, and the concentration of the particulate matters is monitored to be greater than or equal to the set value, a dust removal and combustion treatment mode is carried out: opening an actuator on a tail gas connecting air pipe, a dust removal device air inlet pipe and a dust removal device and combustion device connecting air pipe, closing the other actuators, enabling the tail gas to enter the dust removal device for dust fall through the tail gas connecting air pipe and the dust removal device air inlet pipe, enabling the dust-fallen tail gas to enter the combustion device through the connecting air pipe, removing organic matters in the tail gas after combustion, and sending the treated tail gas to an exhaust funnel through an exhaust fan for emission;
when the concentration of the volatile organic compounds in the tail gas is monitored to be greater than or equal to a set value, the temperature is greater than or equal to a set value, the humidity is less than a set value, and the concentration of the particulate matters is greater than or equal to a set value, a processing mode of combustion, cooling and dust removal is carried out: opening a tail gas connecting air pipe, a combustion equipment air inlet pipe, and actuators on the combustion equipment and cooling equipment connecting air pipes, closing the other actuators, enabling the tail gas to enter the combustion equipment through the tail gas connecting air pipe and the combustion equipment air inlet pipe, removing organic matters in the tail gas after combustion, enabling the tail gas to enter the cooling equipment through the connecting air pipe for cooling, enabling condensate water to enter wastewater treatment equipment for treatment, enabling the other tail gas to enter dust removal equipment through the connecting air pipe, enabling the dust removal equipment to perform dust removal on particulate matters in the tail gas, and sending the dust-removed tail gas to an exhaust funnel through an exhaust fan for emission;
when the concentration of volatile organic compounds in the tail gas is monitored to be less than a set value, the temperature is monitored to be less than a set value, the humidity is monitored to be greater than or equal to a set value, and the concentration of particulate matters is monitored to be less than a set value, a treatment mode of cooling, gas-liquid separation and carbon adsorption is carried out: opening actuators on connecting air pipes of a tail gas connecting air pipe, a cooling device air inlet pipe, the cooling device and the air-liquid separation device, and the air-liquid separation device and the carbon adsorption device, closing the rest actuators, enabling the tail gas to enter the cooling device through the tail gas connecting air pipe and the air inlet pipe of the cooling device for cooling, enabling the cooled tail gas to enter the air-liquid separation device through the connecting air pipe for gas-liquid separation, enabling the separated condensate water to enter wastewater treatment equipment for treatment, enabling the rest tail gas to enter the carbon adsorption device through the connecting air pipe, enabling organic matters in the tail gas to be adsorbed by activated carbon, and sending the treated tail gas to an exhaust funnel through an exhaust fan for emission;
when the concentration of volatile organic compounds in the tail gas is monitored to be less than a set value, the temperature is monitored to be less than a set value, the humidity is monitored to be greater than or equal to a set value, and the concentration of particulate matters is monitored to be greater than or equal to a set value, then a processing mode of dust removal, cooling, gas-liquid separation and carbon adsorption is carried out: opening tail gas connecting air pipe, the dust collecting equipment air-supply line, cooling device air-supply line and cooling device and gas-liquid separation equipment, the executor on the connecting air pipe of gas-liquid separation equipment and carbon adsorption equipment, all the executor close, tail gas removes dust in getting into dust collecting equipment through the air-supply line of dust collecting equipment, tail gas after the dust removal cools down in getting into cooling device through the connecting air pipe, tail gas after the cooling carries out gas-liquid separation through connecting the air pipe entering gas-liquid separation equipment, the comdenstion water of separating gets into waste water treatment equipment and handles, all the other tail gas gets into carbon adsorption equipment through connecting the air pipe, organic matter in the tail gas is adsorbed by the active carbon, tail gas after the processing is delivered to the aiutage through the air exhauster and is discharged.
The utility model has the beneficial effects that:
the utility model utilizes the monitoring and switching device to quickly identify the temperature, the humidity, the concentration of particulate matters and the concentration of volatile organic compounds of the tail gas, automatically switches into different treatment modes, realizes the purpose of flexibly and efficiently purifying the tail gas, and solves the problems of single process mode, poor flexibility and high economic cost of the existing thermal desorption tail gas treatment technology.
Drawings
FIG. 1 is a schematic structural framework diagram of a multi-stage tail gas treatment system according to an embodiment of the present invention;
in the figure:
1. a dust removal device; 2. a combustion device; 3. a cooling device; 4. a gas-liquid separation device; 5. a carbon adsorption device; 6. an exhaust fan; 7. a wastewater treatment facility;
11. a first air valve; 12. a second air valve; 13. a third air valve; 14. a fourth air valve; 15. a fifth air valve; 16. a sixth blast valve; 17. a seventh blast gate; 18. a No. eight air valve; 19. nine blast gates.
Detailed Description
Furthermore, the terms "number one", "number two", etc "X" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined by an "X" number may explicitly or implicitly include one or more of that feature. In the description of the present invention, "a plurality" means two or more unless specifically limited otherwise.
In the present invention, unless otherwise expressly specified or limited, the terms "mounted," "connected," "secured," and the like are to be construed broadly and can, for example, be fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.
The principles and features of this invention are described below in conjunction with the following drawings, which are set forth by way of illustration only and are not intended to limit the scope of the utility model. It is to be noted that the drawings are in a very simplified form and are not to precise scale, which is merely for the purpose of facilitating and distinctly claiming the embodiments of the present invention.
In one embodiment of the utility model, the tail gas multistage treatment system comprises a dust removal device, a combustion device, a cooling device, a gas-liquid separation device, a carbon adsorption device, an exhaust fan, an exhaust funnel, a wastewater treatment device and a monitoring switching device;
the dust removing equipment is connected with the tail gas connecting air pipe; an air inlet pipe of the combustion equipment is connected with a tail gas connecting air pipe, and the combustion equipment is connected with the dust removal equipment through the connecting air pipe; an air inlet pipe of the cooling equipment is connected with a tail gas connecting air pipe, and the cooling equipment is also connected with the dust removal equipment and the combustion equipment through connecting air pipes; the gas-liquid separation equipment is connected with the cooling equipment through a connecting air pipe; the carbon adsorption equipment is connected with the gas-liquid separation equipment through a connecting air pipe; the exhaust fan is respectively connected with the air outlets of the dust removing equipment, the combustion equipment and the carbon adsorption equipment through an overrunning pipeline provided with a plurality of branches; the exhaust cylinder is connected with the exhaust fan and used for discharging the gas which reaches the standard after being processed; the waste water treatment equipment is respectively connected with the water outlets of the cooling equipment and the gas-liquid separation equipment through an overrunning pipeline provided with a plurality of branches; the monitoring switching device comprises a monitor, a controller and an actuator, wherein the monitor is arranged at a position where the tail gas is connected with the air pipe, the monitor monitors the tail gas and transmits a monitoring signal to the controller, the controller analyzes the monitoring signal and sends an execution signal to the actuator, and the actuator executes a control instruction sent by the controller;
the actuators are arranged on the tail gas connecting air pipe and the connecting air pipe respectively, in the embodiment, the monitor comprises a temperature and humidity transmitter, a particulate matter detector and a VOCs monitor, the actuators are arranged as air valves, and the air valves are 9 and are arranged on the tail gas connecting air pipe, the air inlet pipes of the dust removing equipment, the combustion equipment and the cooling equipment respectively, the connecting air pipes of the dust removing equipment, the combustion equipment and the cooling equipment, the dust removing equipment and the cooling equipment, the cooling equipment and the gas-liquid separating equipment, and the gas-liquid separating equipment and the carbon adsorption equipment respectively. The air valve arranged on the air pipe for connecting the dust removal equipment and the combustion equipment is called a fifth air valve, the air valve arranged on the air pipe for connecting the combustion equipment and the cooling equipment is called a sixth air valve, the air valve arranged on the air pipe for connecting the dust removal equipment and the cooling equipment is called a seventh air valve, the air valve arranged on the air pipe for connecting the cooling equipment and the gas-liquid separation equipment is called an eighth air valve, and the air valve arranged on the air pipe for connecting the gas-liquid separation equipment and the carbon adsorption equipment is called a ninth air valve.
According to the multistage tail gas treatment system, the critical values of the concentration of volatile organic compounds, the temperature, the humidity and the concentration of particulate matters are set whenHowever, in other embodiments, it may be a range rather than a threshold, for example, a temperature setting of 120℃, a humidity setting of 60%, and a particulate concentration setting of 50mg/m3The set value of the concentration of the volatile organic compounds is 100mg/m3Several processing examples are available as follows:
example one
Respectively measuring the temperature of 15-100 ℃, the humidity of 20-40% and the concentration of the particulate matters of 50-300 mg/m by using a temperature and humidity transmitter, a particulate matter detector and a VOCs monitor3The concentration of organic matter is 100-300 mg/m3The method comprises the steps of monitoring that the temperature and the humidity in tail gas are smaller than set values, the concentration of particulate matters and the concentration of volatile organic matters are larger than or equal to the set values, extracting the tail gas with the characteristics of high concentration of volatile gas, low temperature, low humidity and high dust content, starting a dust removal and combustion processing mode by a system, namely opening a first air valve, a second air valve and a fifth air valve, closing the rest air valves, enabling the tail gas to enter dust removal equipment for dust removal through a tail gas connecting air pipe and a dust removal equipment air inlet pipe, enabling the tail gas after dust removal to enter combustion equipment through a connecting air pipe, removing the organic matters in the tail gas after combustion, and sending the processed tail gas to an exhaust funnel through an exhaust fan for emission.
Example two
Respectively measuring the temperature of 120-550 ℃, the humidity of 30-50% and the concentration of the particulate matters of 50-300 mg/m by using a temperature and humidity transmitter, a particulate matter detector and a VOCs monitor3The concentration of organic matter is 100-300 mg/m3The concentration of volatile organic compounds in the tail gas is monitored to be greater than or equal to a set value, the temperature is greater than or equal to a set value, the humidity is less than a set value, the concentration of particulate matters is greater than or equal to a set value, the extracted tail gas has the characteristics of high temperature, low humidity, high dust content and high concentration of volatile gases, a system starts a combustion + cooling + dust removal processing mode, namely, a first air valve, a third air valve and a sixth air valve are opened, the rest air valves are closed, the tail gas enters combustion equipment through a tail gas connecting air pipe and a combustion equipment air inlet pipe, the organic matters in the tail gas are removed after combustion, the tail gas enters cooling equipment through a connecting air pipe for cooling, condensed water enters a wastewater position for cooling, and the condensed water enters a wastewater positionAnd (4) treating in the equipment, enabling the rest tail gas to enter dust removal equipment through a connecting air pipe, carrying out dust removal on particulate matters in the tail gas by the dust removal equipment, and delivering the dust-removed tail gas to an exhaust funnel through an exhaust fan to be discharged.
EXAMPLE III
Respectively measuring the temperature of 90-110 ℃, the humidity of 60-100% and the particulate matter concentration of 10-45 mg/m by using a temperature and humidity transmitter, a particulate matter detector and a VOCs monitor3The concentration of organic matter is 35-95 mg/m3Namely, the concentration of volatile organic compounds in the tail gas is monitored to be less than a set value, the temperature is less than a set value, the humidity is greater than or equal to a set value, the concentration of particulate matters is monitored to be less than a set value, the extracted tail gas has the characteristics of low temperature, high humidity, low dust content and low concentration of volatile gases, a system starts a cooling, gas-liquid separation and carbon adsorption treatment mode, namely, the first air valve, the fourth air valve, the eighth air valve and the ninth air valve are opened, the other air valves are closed, tail gas enters cooling equipment for cooling through a tail gas connecting air pipe and an air inlet pipe of the cooling equipment, the cooled tail gas enters gas-liquid separation equipment for gas-liquid separation through a connecting air pipe, separated condensate water enters wastewater treatment equipment for treatment, and the rest tail gas enters the carbon adsorption equipment through the connecting air pipe, organic matters in the tail gas are adsorbed by the activated carbon, and the treated tail gas is sent to the exhaust funnel through the exhaust fan to be discharged.
Example four
The temperature and humidity transmitter, the particulate matter detector and the VOCs monitor respectively measure the temperature of 100-110 ℃, the humidity of 100% and the particulate matter concentration of 100-400 mg/m3The concentration of organic matter is 35-95 mg/m3The method comprises the steps of monitoring that the concentration of volatile organic compounds in tail gas is less than a set value, the temperature is less than a set value, the humidity is greater than or equal to a set value, the concentration of particulate matters is greater than or equal to a set value, the extracted tail gas has the characteristics of low temperature, high humidity, high dust content and low concentration of volatile gas, starting a system to perform a processing mode of dust removal, cooling, gas-liquid separation and carbon adsorption, namely opening a first air valve, a second air valve, a fourth air valve, an eighth air valve and a ninth air valve, closing the rest air valves, enabling the tail gas to enter dust removal equipment through an air inlet pipe of the dust removal equipment to perform dust removal, and performing dust removal on the tail gasThe tail gas cooling device comprises a cooling device, a connecting air pipe, a gas-liquid separation device, a waste water treatment device, a carbon adsorption device, an exhaust funnel, an exhaust fan, a connecting air pipe, a cooling device, a gas-liquid separation device, a waste water treatment device and a carbon adsorption device.
It should be noted that the present invention only provides four treatment modes for the common exhaust gas extracted by thermal desorption technology (for example, the exhaust gas described in the four embodiments), and of course, there are four other types of exhaust gas, and for such exhaust gas, the selection mode can be manually adjusted by the control panel connected to the monitoring switching device.
Furthermore, it should be understood that although the present description refers to embodiments, not every embodiment may contain only a single embodiment, and such description is for clarity only, and those skilled in the art should integrate the description, and the embodiments may be combined as appropriate to form other embodiments understood by those skilled in the art.
Claims (6)
1. A tail gas multistage treatment system comprises a dust removal device, a combustion device, a cooling device, a gas-liquid separation device, a carbon adsorption device, an exhaust fan, an exhaust funnel, a wastewater treatment device and a monitoring switching device,
the dust removing equipment is connected with the tail gas connecting air pipe;
an air inlet pipe of the combustion equipment is connected with the tail gas connecting air pipe, and the combustion equipment is connected with the dust removal equipment through the connecting air pipe;
an air inlet pipe of the cooling equipment is connected with the tail gas connecting air pipe, and the cooling equipment is also connected with the dust removal equipment and the combustion equipment through connecting air pipes;
the gas-liquid separation equipment is connected with the cooling equipment through a connecting air pipe;
the carbon adsorption equipment is connected with the gas-liquid separation equipment through a connecting air pipe;
the exhaust fan is connected with the air outlets of the dust removal equipment, the combustion equipment and the carbon adsorption equipment;
the exhaust cylinder is connected with the exhaust fan and used for discharging the gas which reaches the standard after being processed;
the wastewater treatment equipment is connected with the cooling equipment and the water outlet of the gas-liquid separation equipment;
the monitoring and switching device comprises a monitor, a controller and an actuator, wherein the monitor is arranged at a tail gas connecting air pipe, the monitor monitors tail gas and transmits monitoring signals to the controller, the controller analyzes the monitoring signals and sends execution signals to the actuator, the actuator is provided with a plurality of actuators which are respectively arranged on the tail gas connecting air pipe and the connecting air pipe, and the actuator executes control instructions sent by the controller.
2. The multistage tail gas treatment system according to claim 1, wherein the exhaust fan is connected to the outlets of the dust removal device, the combustion device and the carbon adsorption device through an overrunning pipeline provided with a plurality of branches.
3. The multistage tail gas treatment system according to claim 1, wherein the wastewater treatment equipment is connected with the water outlets of the cooling equipment and the gas-liquid separation equipment through an overrunning pipeline provided with a plurality of branches.
4. The multi-stage tail gas treatment system of claim 1, wherein the wastewater treatment device comprises a flocculation tank and an oxidation tank.
5. The exhaust gas multistage treatment system according to claim 1, wherein the monitor comprises a VOCs monitor, a temperature and humidity transmitter and a particulate matter detector, and is used for monitoring the concentration of volatile organic compounds, the temperature, the humidity and the particulate matter in the exhaust gas conveyed by the exhaust gas connecting air pipe.
6. The multistage tail gas treatment system according to claim 1, wherein the actuator comprises 9 air valves, and the air valves are respectively arranged on the tail gas connecting air pipe, the air inlet pipes of the dust removal device, the combustion device and the cooling device, and the connecting air pipes of the dust removal device and the combustion device, the combustion device and the cooling device, the dust removal device and the cooling device, the cooling device and the gas-liquid separation device, and the gas-liquid separation device and the carbon adsorption device.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202121419562.1U CN215574958U (en) | 2021-06-24 | 2021-06-24 | Multistage processing system of tail gas |
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| CN202121419562.1U CN215574958U (en) | 2021-06-24 | 2021-06-24 | Multistage processing system of tail gas |
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