TWM545782U - Waste heat applied to systems for treating and recovering volatile organic pollutants in soil and groundwater - Google Patents

Description

Waste heat application system for treating and recovering volatile organic pollutants in soil and groundwater

This creation is about a system for treating and recovering volatile organic pollutants from soil and groundwater, especially for a plant that uses waste heat from the plant to recover and purify volatile organic compounds that have leaked into the soil and groundwater for recycling.

In the past, in the treatment of volatile organic pollutants in soil and groundwater, the soil gas extraction (SVE) was mainly used in combination with air sparging (AS). The SVE method is mainly used in the treatment. A gas recovery well is disposed in the unsaturated layer soil, and the gas in the unsaturated layer soil is extracted to the ground by the pumping pump on the ground, and the extracted gas contains volatile organic pollutants, so that it can be simultaneously extracted on the ground. It is treated by other equipment, such as activated carbon adsorption, advanced oxidation, catalytic oxidation or incineration. In the above gas extraction process, the soil gap of the unsaturated layer will be vacuumed due to the gas being removed, due to The factors of chemical equilibrium and pressure balance, at this time, the volatile organic pollutants in the groundwater will be volatilized from the water to the voids of the unsaturated layer soil and thus be removed, further achieving the goal of treating volatile organic compounds in groundwater. However, the SVE method The treatment efficiency of volatile organic pollutants in groundwater is poor, so it is necessary to cooperate with air injection method. The aqueous layer was saturated aeration, in order to increase the efficiency of volatilization of volatile organic compounds in groundwater, air is injected may also unsaturated In the layer, the gas flow rate in the soil is increased, and the extraction efficiency of the SVE method is improved. However, SVE is limited by the rate at which volatile organic compounds are volatilized. It usually takes a long time to reach the pollution improvement target, and the extracted pollutants are usually treated by activated carbon adsorption, advanced oxidation, catalytic oxidation or incineration. It usually takes a lot of energy and produces a lot of waste at the same time, so it is economically inefficient and harmful to the environment.

Therefore, there has been a prior art development of a steam heat treatment method to improve the SVE/AS mode treatment efficiency, that is, a steam generated by a steam generator on the ground to replace the injected air by a steam of about 100 ° C, and the injected steam will heat the saturated layer or the unsaturated layer. The layer increases the temperature of the underground environment. When the temperature rises, the volatilization rate of volatile organic compounds will increase, and the efficiency of soil and groundwater pollution treatment will be accelerated. However, the use of a steam generator also requires a large amount of electricity or fuel to continuously generate sufficient injection steam, and is also a pollution-friendly treatment for environmentally unfriendly. In addition, the generated tail gas is rich in water vapor, so that the back-end processing equipment may additionally generate waste water containing volatile organic compounds in addition to the aforementioned exhaust gas treatment equipment, and the demand and cost of the wastewater treatment equipment need to be additionally derived.

In addition, in the past, there were techniques for recovering pollutants extracted by the SVE method by means of condensation and suction and desorption. However, in general, the underground environment temperature is slightly lower than the atmospheric temperature or close to the atmospheric temperature, and the gas extracted by the SVE method needs to be reheated and heated up to be possible. The operating temperature of the condensing recovery and suction and desorption equipment makes the equipment require additional energy consumption and is not economical.

Because steam can provide higher specific heat than water, when there is process heating demand, the factory usually has steam boilers to provide steam. However, after these steams are used, they are usually directly discharged due to insufficient temperature, resulting in a lot of energy waste. The use of waste heat from the plant to treat volatile organic pollutants in soil and groundwater is a practical and environmentally friendly improvement.

In view of this, the creator provides a local treatment system that applies residual heat to volatile organic soil and groundwater pollution, mainly using steam generated by the factory as a source of hot steam, injected into the unsaturated layer and the saturated layer, and extracted from the well site. And vacuum extraction system, while recovering hot steam and groundwater containing pollutants, the recovered hot steam is introduced into the recovery system, which can recover and purify volatile organic compounds in soil and groundwater for recycling.

The present invention provides a system for treating and recovering volatile organic pollutants in soil and groundwater, the system comprising: an inflow steam conditioning unit for receiving a vapor discharged from a plant, comprising an air compressor, Providing an air to be mixed with the vapor to form a mixed gas; a well site unit for receiving the mixed gas, comprising at least one injection well and at least one extraction well, and injecting the mixed gas into a subterranean zone through the injection well And increasing the temperature of the underground region, extracting a gas containing a pollutant and a groundwater containing a pollutant by heating the mixed gas through the extraction well; and a wastewater treatment unit for receiving the well site unit The foregoing contaminant-containing groundwater comprises a gas-liquid separation device, an oil-water separation and cooling device, an aeration device and an activated carbon adsorption device, wherein the gas-liquid separation device is connected to the well site unit and the aforementioned oil-water separation and cooling device. For volatilization and recovery of the aforementioned groundwater containing contaminants An organic matter gas, the oil-water separation and cooling device for cooling the aforementioned groundwater containing contaminants, and separating one of the contaminant-containing groundwater and a groundwater, the aeration device connecting the oil-water separation and cooling device For recovering the volatile pollutants in the groundwater treated by the oil-water separation and cooling equipment, the groundwater treated by the aeration equipment is sent to the activated carbon adsorption equipment for treatment, and discharged; and a steam exhaust gas treatment unit For receiving the wellsite unit before the extraction a contaminant-containing gas comprising a heat exchange and gas mixing device, a high concentration tail gas recovery device, and a medium and low concentration tail gas recovery device, wherein the heat exchange and gas mixing device is used to adjust the gas containing the pollutant to The temperature and concentration required for condensation recovery, the high concentration tail gas recovery device is configured to condense the gas containing the pollutants to obtain a first condensate and a condensed gas, and the low-concentration tail gas recovery device is passed through An adsorbent concentrates the contaminants in the condensed gas to recover contaminants and obtain a second condensate.

Preferably, the aforementioned air supplied by the air compressor can be used to adjust the pressure, flow rate and amount of vapor of the aforementioned mixed gas.

Preferably, the inflow steam adjusting unit further comprises a first heat exchange device for heating the air through the vapor discharged from the factory.

Preferably, the inflow steam adjusting unit further comprises a regulating valve for adjusting the ratio of steam to air in the mixed gas.

Preferably, the inflow vapor regulating unit further comprises a gas injection distribution device for maintaining the temperature of the mixed gas and adjusting the injection pressure and flow rate of the mixed gas entering the injection well.

Preferably, the injection well and the extraction well are at least one shaft or one horizontal well, respectively.

Preferably, the injection well comprises at least an injection well above a groundwater level and an injection well below a groundwater level.

Preferably, the extraction well comprises at least one extraction well above the groundwater level and an extraction well below the groundwater level.

Preferably, the foregoing wastewater treatment unit further comprises a pollutant recovery tank for storing Contaminants separated by the aforementioned oil-water separation and cooling equipment.

Preferably, the gas-liquid separation device and the gas with volatile pollutants recovered by the aeration device are sent to the steam exhaust gas treatment unit for treatment.

Preferably, the aforementioned heat exchange and gas mixing device adjusts the gas content of the aforementioned contaminant-containing gas to a gas concentration required for a high-concentration exhaust gas recovery device, and the concentration ranges from 20,000 to 30,000 ppm.

Preferably, the aforementioned heat exchange and gas mixing device comprises a second heat exchange device and a gas mixing and conditioning device.

Preferably, the high concentration tail gas recovery device comprises a first conditioning tank and a first condensation recovery tower.

Preferably, the first adjusting tank is configured to adjust a flow rate of the gas entering the first condensation recovery tower, and the flow rate is a laminar flow field of less than 1.5 m/s.

Preferably, the condensation temperature of the first condensation recovery column is -5 to 5 °C.

Preferably, the pollutant concentration of the outflow gas of the first condensation recovery tower is less than 5000 ppm.

Preferably, the medium and low concentration tail gas recovery device comprises a second conditioning tank, a dehumidifying condensing device, a suction and desorption concentration tank, and a second condensation recovery tower.

Preferably, the second adjusting tank is connected to the foregoing dehumidifying and condensing device, and the second adjusting tank is configured to adjust a gas flow rate entering the dehumidifying and condensing device.

Preferably, the aforementioned dehumidifying and condensing device is connected to the suction and desorption concentrating tank, and the dehumidifying and condensing device is used to adjust the temperature and humidity of the gas entering the suction and desorption concentration tank.

Preferably, the suction and desorption concentration tank is connected to the second condensation recovery tower, the aforementioned The suction and desorption concentration tank condenses the contaminants in the gas through the adsorption material, and the second condensation recovery tower is configured to condense the outflow gas of the suction and desorption concentration tank.

Preferably, the condensed gas of the aforementioned second condensing recovery column can be led back to the aforementioned dehumidifying condensing device.

Preferably, the steam exhaust gas treatment unit further comprises a liquid-liquid separation device and a recovery tank for the second condensation obtained by the first condensation liquid obtained by the high-concentration tail gas recovery device and the low-concentration tail gas recovery device. The liquid is further separated to obtain a condensed water and volatile organic matter, and the volatile organic matter is recovered, and the condensed water can be further introduced into the wastewater treatment unit for treatment.

Preferably, in the steam exhaust gas treatment unit, a switching valve is disposed between the high-concentration tail gas recovery device and the medium-low concentration exhaust gas recovery device, and the concentration of the gas containing the pollutants cannot reach the high-concentration exhaust gas recovery device. The gas concentration required may be directly sent to the aforementioned medium and low concentration tail gas recovery equipment for adsorption and desorption recovery.

Different from the traditional organic pollutant treatment equipment, the system provided by this creation can effectively utilize the volatile organic matter pollution in the soil and groundwater generated by the factory, and at the same time, it can solve the problem of soil and groundwater pollution, energy conservation, resource recycling. The effect is an environmentally friendly VOC pollution remediation system.

100‧‧‧ Waste heat applied to the treatment and recovery of volatile organic pollutant systems in soil and groundwater

10‧‧‧Inlet steam conditioning unit

11‧‧‧Air compressor

12‧‧‧First heat exchange equipment

13‧‧‧Regulator

14‧‧‧Injection distribution equipment

20‧‧‧ Wellsite unit

21‧‧‧Injection well

211‧‧‧Injection well above the groundwater level

212‧‧‧Injection well below the groundwater level

22‧‧‧Draw out the well

221‧‧‧Drawout well above the groundwater level

222‧‧‧ extraction well below the groundwater level

30‧‧‧Wastewater treatment unit

31‧‧‧Water and water separation and cooling equipment

32‧‧‧Active carbon adsorption equipment

33‧‧‧Aeration equipment

34‧‧‧ gas-liquid separation equipment

35‧‧‧Contaminant recovery tank

40‧‧‧Vapor exhaust treatment unit

41‧‧‧Heat exchange and gas conditioning equipment

411‧‧‧Second heat exchange equipment

412‧‧‧Gas mixing and conditioning equipment

42‧‧‧High concentration tail gas recovery equipment

421‧‧‧First adjustment slot

422‧‧‧First Condensate Recovery Tower

43‧‧‧Low-concentration tail gas recovery equipment

431‧‧‧Switching valve

432‧‧‧Second adjustment slot

433‧‧‧Dehumidification and condensation equipment

434‧‧‧Sucking and concentrating tank

435‧‧‧Second Condensation Recovery Tower

44‧‧‧Liquid and liquid separation equipment and recovery tank

S‧‧‧Vapor

A‧‧‧Air

UG‧‧‧Underground area

GW‧‧‧ Groundwater Surface

The first picture is a schematic diagram of the architecture of this creation.

In order to fully understand the efficacy of this creation, please refer to the diagram and figure number for a better example of this creation.

The waste heat provided by the creation is applied to the treatment and recovery of volatile organic pollutants system 100 in soil and groundwater. The waste heat source mainly receives steam S discharged from a factory, and the system comprises: an inflow steam regulating unit 10, a well site The unit 20, a wastewater treatment unit 30, and a vapor tail gas treatment unit 40, which can be used as a reference for the first figure and the component symbols.

The inflow steam adjusting unit 10 is configured to receive the steam discharged from the factory. The steam temperature currently discharged by the factory is mostly between 120 ° C and 170 ° C. Since the hot steam pressure and the flow rate of the plant line need to be adjusted according to the design of the well site unit 20, The inlet steam conditioning unit 10 includes an air compressor 11 to provide an air A and vapor S to form a mixed gas for adjusting the vapor pressure, vapor volume and flow rate into the wellsite unit 20. In addition, in order to prevent the injected steam A from being mixed with the steam S, the temperature of the injected steam is unstable. Therefore, the inflow steam adjusting unit 10 may include a first heat exchange device 12 for passing through the steam S generated by the factory. A heat exchange device 12 heats the injected air A. In a preferred embodiment, the inflow vapour conditioning unit 10 may further include a regulating valve 13 and a gas injection distributing device 14 for adjusting the ratio of the hot vapor to the hot air via the regulating valve 13, and then adjusting the injection pressure through the heat preservation and the adjusting injection pressure. The gas injection distribution device 14 of the flow function enters the wellsite unit 20. The first heat exchange device 12 and the gas injection distribution device 14 also have a temperature adjustment function that allows the injected mixed gas to reach the design temperature of the steam heat treatment, which temperature can be determined by the physical and chemical properties of the pollutant to be treated.

The well site unit 20 is configured to receive a mixed gas of air and steam, and includes at least one injection well 21 and at least one extraction well 22, and the injection well 21 injects the mixed gas into a subterranean zone UG, so that the underground zone UG is from room temperature or slightly Lower than room temperature, the temperature is raised to 40-95 ° C, and the extracted well 22 is used to extract the soil and the groundwater is heated by the mixed gas to volatilize the gas containing the pollutant or/and the groundwater containing the pollutant, and the pollutant is contained at this time. Groundwater may also be heated to hot water. When the well site unit 20 is planned, a plurality of injection wells 21 and extraction wells 22 having different depths may be designed, and the position and depth of the injection gas injected into the injection well 21 may be determined according to the location and distribution of the pollutants.

The injection well 21 can be planned according to the actual pollutant distribution and heating demand. The injection well 21 can be distinguished according to the groundwater level surface GW, and is divided into an injection well 211 above the groundwater level surface and an injection well 212 below the groundwater level surface, and is contaminated according to the pollution. The range is designed as a shaft or a horizontal well, and the horizontal well usually has a better gas dispersion effect. The extraction well 22 can also be distinguished according to the groundwater level surface GW, and is divided into the extraction well 221 above the groundwater level surface and the extraction well 222 below the groundwater level surface, and the extraction well 221 above the groundwater level surface, the main purpose of which is to extract and disperse in the soil. The gas in the process of extracting the heated soil gas, hot steam and hot air, and removing volatile organic pollutants volatilized by the increase in temperature. When the extraction well 221 above the groundwater level is a shaft, The screening interval needs to be larger than the opening interval of the injection well 21 to cover the hot steam dispersion range as much as possible. If the horizontal well is used, the length of the well screen needs to be larger than the opening interval of the injection well 21 and located above and below the injection well 21. The extraction well 222 below the groundwater level has the function of lowering the groundwater level and extracting hot steam and hot water, and can also be set as a shaft or a horizontal well.

The wastewater treatment unit 30 is configured to receive the contaminant-containing groundwater extracted by the wellsite unit 20, and includes an oil-water separation and cooling device 31 and an activated carbon adsorption device 32. As described above, the groundwater containing the contaminant may also be heated. It is hot water, so it needs to be cooled by the oil-water separation and cooling equipment 31. The oil-water separation can separate the pollutants in the groundwater containing the pollutants from the groundwater according to the physical properties of the pollutants, and reduce the operating load of the subsequent equipment. The separated groundwater is further processed by the activated carbon adsorption device 32, and the wastewater treatment unit 30 may further comprise a pollutant recovery tank 35, wherein the pollutants separated by the oil-water separation process may be introduced into the storage and separately processed, preferably The wastewater treatment unit 30 may further comprise an aeration device 33 for connecting the oil The water separating and cooling device 31 is configured to recover the gas with volatile pollutants in the groundwater treated by the oil-water separation and cooling device 31, and send it to the steam exhaust gas treatment unit 40, and the groundwater treated by the aeration device 33 is sent The activated carbon adsorption device 32 is discharged after final treatment. Through the above-mentioned treatment procedure, the pollutants remaining in the groundwater containing the pollutants can be effectively recovered, and the amount of activated carbon can be reduced.

The groundwater containing the contaminants extracted by the wellsite unit 20 may contain both volatile organic pollutants and their volatilized gases. In a preferred embodiment, the wastewater treatment unit 30 may further comprise a gas-liquid separation device 34. Between the well site unit 20 and the oil-water separation and cooling device 31, the well site unit 20 and the oil-water separation and cooling device 31 are connected to volatilize the volatile organic compounds contained in the contaminated groundwater extracted by the wellsite unit 20. The gas contained in the groundwater containing the contaminant is separated, and the separated gas is extracted, mixed with the gas containing the pollutant extracted from the extraction well 20, and sent to the steam exhaust gas treatment unit 40 for treatment and recovery.

The steam exhaust gas treatment unit 40 is configured to receive the pollutant-containing gas extracted by the well site unit 20, and includes a heat exchange and gas mixing device 41, a high concentration tail gas recovery device 42, and a medium and low concentration tail gas recovery device 43. The heat exchange and gas mixing device 41 comprises a second heat exchange device 411 and a gas mixing and conditioning device 412, since the temperature of the extracted pollutant-containing gas is approximately equal to or slightly lower than the injection temperature, but still higher than the natural environment. The temperature, so the second heat exchange device 411 can reheat the gas with volatile contaminants recovered by the gas-liquid separation device 34 of the wastewater treatment unit 30 and the aeration device 33, and pass through the gas mixing and conditioning device 412 and the extraction well 22 The gas containing the pollutants is mixed to stabilize the temperature and reduce the subsequent operation load. In addition, the gas can be adjusted to the concentration required for condensation recovery, preferably, the concentration ranges from 20,000 to 30,000 ppm, but this creation Not limited to this.

The high-concentration exhaust gas recovery device 42 is configured to condense the mixed gas to obtain a first condensate and a condensed gas. The high-concentration exhaust gas recovery device 42 may include a first conditioning tank 421 and a first condensation recovery tower 422. The first adjusting tank 421 is for regulating the flow rate of the gas entering the first condensation recovery tower 422. Preferably, the flow rate is a laminar flow field of less than 1.5 m/s, and the condensation temperature of the first condensation recovery tower 422 is - 5 ° C ~ 5 ° C, thereby reducing the concentration of the outflow gas pollutants leaving the first condensation recovery tower 422 to below 5000 ppm.

The medium and low concentration tail gas recovery device 43 collects the pollutants in the gas through an adsorbent (not shown), recovers the pollutants by condensation recovery, and obtains a second condensate, and the medium and low concentration tail gas recovery device 43 can include a second adjusting tank 432, a dehumidifying and condensing device 433, a suction and desorption concentration tank 434, and a second condensation recovery tower 435, the second adjusting tank 432 is connected to the dehumidifying and condensing device 433, and the dehumidifying and condensing device 433 is connected to the suction and desorption unit. The tank 434, the suction and desorption concentration tank 434 is connected to the second condensation recovery tower 435, wherein the second adjustment tank 432 is used to adjust the gas flow rate into the dehumidification condensing device 433, and the dehumidification condensing device 433 is used to adjust the inlet and outlet concentration tank. The gas temperature and humidity of 434 are made to meet the operating conditions of the adsorption and desorption concentration tank 434, and the condensed liquid and the condensed gas are obtained after being treated by the dehumidifying and condensing device 433, and the adsorption and desorption concentration tank 434 is passed through the adsorption material (not shown). Concentrating the contaminants in the condensed gas, and the second condensing recovery tower 435 is configured to condense the outflow gas of the suction and desorption concentrating tank to obtain the condensed liquid and the condensed gas. Preferably, Two condensed condensate recovery column 435 can be directed back to the dehumidification of the gas condensation processing apparatus 433 again recovered.

In a preferred embodiment, the vapor tail gas treatment unit 40 further includes a liquid-liquid separation device and a recovery tank 44 for first condensation of the high-concentration tail gas recovery unit 42 (the first condensation recovery column 422). The liquid, and the second condensate obtained by the medium and low concentration tail gas recovery device 43 (the dehumidification condensing device 433 and the second condensation recovery column 435) are further separated to obtain a condensed water and a volatile The organic matter is recovered and the volatile organic matter is recovered, and the condensed water can be further introduced into the wastewater treatment unit 30 for treatment. In addition, since the contaminants in the soil and groundwater will gradually decrease in concentration as the system operates to achieve the effect of improving the decontamination, in the vapor tail gas treatment unit 40, the first condensation recovery tower 422 of the high concentration tail gas recovery unit 42 is Between the second regulating tanks 432 of the medium and low concentration tail gas recovery equipment 43, a switching valve 431 may be provided, and the gas concentration of the gas containing the pollutants cannot be condensed and recovered by the first condensing recovery tower 422 of the high concentration tail gas recovery unit 42. The gas concentration can directly send the pollutant-containing gas to the medium and low concentration tail gas recovery equipment 43 for recycling.

However, the above embodiments are intended to illustrate the features of the present invention, and the purpose of the present invention is to enable those skilled in the art to understand the contents of the present invention and to implement it, and not to limit the scope of the patent of the present invention. Equivalent modifications or modifications made by the spirit of the disclosure should still be included in the scope of the claims described below.

100‧‧‧ Waste heat applied to the treatment and recovery of volatile organic pollutant systems in soil and groundwater

10‧‧‧Inlet steam conditioning unit

11‧‧‧Air compressor

12‧‧‧First heat exchange equipment

13‧‧‧Regulator

14‧‧‧Injection distribution equipment

20‧‧‧ Wellsite unit

21‧‧‧Injection well

211‧‧‧Injection well above the groundwater level

212‧‧‧Injection well below the groundwater level

22‧‧‧Draw out the well

221‧‧‧Drawout well above the groundwater level

222‧‧‧ extraction well below the groundwater level

30‧‧‧Wastewater treatment unit

31‧‧‧Water and water separation and cooling equipment

32‧‧‧Active carbon adsorption equipment

33‧‧‧Aeration equipment

34‧‧‧ gas-liquid separation equipment

35‧‧‧Contaminant recovery tank

40‧‧‧Vapor exhaust treatment unit

41‧‧‧Heat exchange and gas conditioning equipment

411‧‧‧Second heat exchange equipment

412‧‧‧Gas mixing and conditioning equipment

42‧‧‧High concentration tail gas recovery equipment

421‧‧‧First adjustment slot

422‧‧‧First Condensate Recovery Tower

43‧‧‧Low-concentration tail gas recovery equipment

431‧‧‧Switching valve

432‧‧‧Second adjustment slot

433‧‧‧Dehumidification and condensation equipment

434‧‧‧Sucking and concentrating tank

435‧‧‧Second Condensation Recovery Tower

44‧‧‧Liquid and liquid separation equipment and recovery tank

S‧‧‧Vapor

A‧‧‧Air

UG‧‧‧Underground area

GW‧‧‧ Groundwater Surface

Claims (13)

A system for treating and recovering volatile organic pollutants in soil and groundwater, the system comprising: an inflow steam conditioning unit for receiving a vapor discharged from a factory, comprising an air compressor for providing a The air is mixed with the steam to form a mixed gas; a well site unit for receiving the mixed gas, comprising at least one injection well and at least one extraction well, and injecting the mixed gas into a subterranean zone through the injection well The temperature of the underground area rises, and the gas extracted by the mixed gas is volatilized through the extraction well to volatilize a gas containing a pollutant and a groundwater containing a pollutant; and a wastewater treatment unit is configured to receive the aforementioned content extracted by the well site unit. Groundwater for pollutants, comprising a gas-liquid separation device, an oil-water separation and cooling device, an aeration device and an activated carbon adsorption device, wherein the gas-liquid separation device is connected to the well site unit and the aforementioned oil-water separation and cooling device for Volatile and recovering volatile organic compounds contained in the aforementioned groundwater containing contaminants The oil-water separation and cooling device is configured to cool the groundwater containing the pollutants, and separate one of the pollutants in the groundwater containing the pollutants and a groundwater, and the aeration device is connected to the oil-water separation and cooling device. The gas with volatile pollutants in the groundwater treated by the oil-water separation and cooling device is recovered, and the groundwater treated by the aeration device is sent to the activated carbon adsorption device for treatment and discharged; and a vapor tail gas treatment unit is used. Receiving the aforementioned pollutant-containing gas extracted by the well site unit, comprising a heat exchange and gas mixing device, a high concentration tail gas recovery device, and a medium and low concentration tail gas recovery device, wherein the heat exchange and gas mixing device is used Adjusting the temperature and concentration required for the condensation-containing gas to condensate recovery, wherein the high-concentration tail gas recovery device is configured to condense the gas containing the pollutant to obtain a first condensate and a condensed gas, The medium and low concentration tail gas recovery equipment can concentrate the condensation after passing through an adsorbent material Contaminants in the gas to recover contaminants and get a second condensate. The system of claim 1, wherein the inflow steam conditioning unit further comprises a first heat exchange device for heating the air through the vapor discharged from the factory. The system of claim 1, wherein the inflow steam conditioning unit further comprises a regulating valve for adjusting a ratio of steam to air in the mixed gas. The system of claim 1, wherein the inflow vapor regulating unit further comprises a gas injection distribution device for maintaining a temperature of the mixed gas and adjusting an injection pressure of the mixed gas entering the injection well and flow. The system of claim 1, wherein the wastewater treatment unit further comprises a pollutant recovery tank for storing pollutants separated by the oil-water separation and cooling device. The system of claim 1, wherein the heat exchange and gas mixing device adjusts the gas containing the contaminant to a gas concentration required for condensation recovery, and the concentration ranges from 20,000 to 30,000 ppm. The system of claim 1, wherein the heat exchange and gas mixing device comprises a second heat exchange device and a gas mixing and conditioning device. The system of claim 1, wherein the high concentration tail gas recovery device comprises a first conditioning tank and a first condensation recovery column. The system of claim 8, wherein the first conditioning tank regulates a gas flow rate into the first condensation recovery column, and the flow rate is a laminar flow field of less than 1.5 m/s. The system of claim 8, wherein the condensation temperature of the first condensation recovery column is -5 to 5 °C. The system of claim 1, wherein the medium and low concentration recovery device comprises a second conditioning tank, a dehumidifying condensing device, a suction and desorption concentrating tank, and a second condensing recovery column. The system of claim 1, wherein the steam exhaust gas treatment unit further comprises a liquid-liquid separation device and a recovery tank for further separating the first condensate and the second condensate to obtain a condensed water and a volatile organic substance, and recovering the volatile organic matter, and the condensed water is introduced into the wastewater treatment unit for treatment. The system of claim 1, wherein the high concentration tail gas recovery device and the medium and low concentration tail gas recovery device are provided with a switching valve.