CN111790244A - A system and method for treating organic gas - Google Patents

Abstract

Embodiments of the present invention relate to an organic gas processing system and method, including: a control system, and a preprocessing unit, a main working unit, and an exhaust unit connected to the control system; the preprocessing unit is used to The organic gas is cooled, dehumidified and dedusted; the pretreatment unit is connected to the main working unit, and is used to pass the organic gas after cooling, dehumidification and dedusting into the main working unit for purification, and the main working unit is connected to the exhaust unit. The gas unit is connected to discharge the purified organic gas. Therefore, the detection, monitoring, control and recording of the main devices of the pure dry processing system and method suitable for dust-containing, low-concentration, large air volume, and warm and humid organic gases can be realized by personnel manipulation or autonomous work. The scope of applicability and work efficiency of the equipment is improved, and the production requirements of different processing capacities for the harmless treatment of organic gases can be achieved through parameter design and intelligent control.

Description

A system and method for processing organic gas

technical field

Embodiments of the present invention relate to the field of organic gas processing, and in particular, to a system and method for processing organic gas.

Background technique

In oil refining and petrochemical, automobile manufacturing painting and automobile maintenance, electronic product manufacturing, shoe manufacturing, wood-based panel manufacturing, wooden furniture, printing and other industries during storage, ventilation and processing, low concentration, large air volume, high humidity ( Up to 80%) of medium and high temperature organic gas is discharged to the outside, and the gas contains a variety of volatile organic compounds (volatile organic compounds, referred to as VOCs) with complex components, such as sugar, nicotine, benzene series, alcohols, ketones Substances such as alkanes, alkanes, acids, lipids, etc., will be emitted into the atmosphere with the exhaust gas to pollute the environment. According to the "Emission Standard of Odor Pollutants", these organic gases need to be treated and discharged up to the standard.

At present, inefficient technologies such as low-temperature plasma, photocatalysis, and photooxidation are applied even more than 80%, and the pollution control effect is poor. The existing VOCs pollution control facilities have the problem of simplicity and inefficiency. For example, organic gas treatment is usually treated by dust collector + low-temperature plasma + cross-type chemical washing tank odor treatment equipment, but this kind of wet treatment device has a large investment, and the annual operation and maintenance, spare parts, water and electricity costs are as high as more than 1.6 million yuan; alkaline washing The discharge of high-concentration wastewater increases the treatment load and cost of the sewage treatment station; the alkali washing treatment increases the moisture content in the exhaust gas, and the investment in dehumidification and defogging equipment needs to be increased. Seasonal influence, large area and heavy weight, affect the layout and the safety of the house structure. In view of the complex components of VOCs waste gas, various treatment technologies, and large differences in applicability, in order to meet the latest emission standards, its innovative technology selection and system matching requirements need to be further improved, from the resource utilization, reduction and harmlessness of organic gas treatment. Starting from the needs of the industry, there is an urgent need for a pure dry processing system and method suitable for dust-containing, low-concentration, large air volume, warm and humid organic gases.

Patent authorization number CN105289905B, the invention discloses a paint spraying air treatment system and method, including a paint spray booth, an air intake treatment device and an exhaust treatment device. The air discharged from the paint booth passes through the paint mist removal device and the first runner to dehumidify After the device, the first air cooler and the VOCs runner are processed, they are separated into clean air and high-concentration VOCs mixture. The clean air is returned to the intake air treatment device from an outlet of the VOCs runner through the return channel. Patent Application No. 201910855377.8, the invention discloses an organic waste gas treatment process combining runner concentration and regenerative oxidation. After heat exchange, the cooled high-temperature gas is discharged from the exhaust pipe, and the heated After the purified gas is combined with another purified gas released by the regulating valve connected to the shunt pipeline, it enters the zeolite concentration runner concentration equipment for processing to form desorption gas. The RTO fan pumps the desorption gas to the valve group, and the valve The gas is sent to the regenerative oxidation equipment for oxidation treatment. The gas after oxidation treatment is switched by the valve group, and part of the gas is returned to the air inlet end of the air intake fan, and then mixed with the organic waste gas and then enters the zeolite concentration again. Purification in runner concentration equipment. Patent application number 201910003508.X, the invention discloses a laboratory fume hood direct-exhaust chemical waste gas treatment device, including: a casing; a centrifugal fan installed in the casing; a TVOC organic gas treatment module installed on the right side of the centrifugal fan ; The sterilization and anti-virus filter module installed on the right side of the TVOC organic gas processing module, and the air outlet of the sterilization and anti-virus filter module is provided with an internal circuitous air duct. Patent Application No. 201510320005.7, the invention discloses an organic waste gas treatment device and method, including a dust collector, a condenser tube, activated carbon adsorption-microwave ultraviolet catalytic oxidation equipment, an air heater, a humidifier, a heat recovery device, and a cooling and drying fan , regeneration fan, exhaust fan. However, these patents do not take into account the comprehensive treatment and waste heat utilization of dusty, low-concentration, large air volume, moist and hot organic gases.

SUMMARY OF THE INVENTION

In order to solve the above technical problems or at least partially solve the above technical problems, embodiments of the present application provide a system and method for processing organic gas.

In a first aspect, an embodiment of the present application provides an organic gas processing system, which is characterized by comprising: a control system, and a preprocessing unit, a main working unit, and an exhaust unit connected to the control system;

The pretreatment unit is used for cooling, dehumidifying and dusting the received organic gas;

The pretreatment unit is connected to one end of the main working unit, and is used to pass the organic gas after cooling, dehumidification and dust removal into the main working unit, and is purified by the zeolite concentration runner in the main working unit. The other end of the main working unit is connected to the exhaust unit for discharging the organic gas purified by the zeolite concentration runner.

Optionally, the pretreatment unit includes: a dehumidification device, a heat exchange device and a dust removal device;

One end of the dehumidification device is provided with a pipeline for receiving organic gas, and the other end of the dehumidification device is connected to the heat exchange device for passing the dried and dehumidified organic gas into the heat exchange device for cooling , the heat exchange device is connected with the dust removal device, and is used for removing particulate matter in the cooled organic gas.

Optionally, the heat exchange device includes: a cyclically connected heat exchanger, a water pump and a cold water reservoir;

One end of the heat exchanger is also connected to the dehumidification device for cooling the dehumidified organic gas, and the other end of the heat exchanger is connected to the dust removal device for cooling the dehumidified organic gas. The gas is passed into the dust removal device.

Optionally, the main working unit includes: a zeolite enrichment runner and a thermal combustion system;

One end of the zeolite concentration runner is connected with the dust removal device, which is used for adsorption and concentration of volatile organic compounds in the organic gas after cooling, dehumidification and dust removal, and then the volatile organic compounds obtained by adsorption and concentration on the runner are absorbed and concentrated by the clean desorption gas. The desorption of volatile organics is carried out to obtain a desorbed gas composed of high-concentration volatile organics, and the other end of the zeolite concentration runner is connected to the thermal combustion system for passing the obtained desorbed gas into the thermal combustion. The system is cleaned.

Optionally, the zeolite concentration runner includes: a treatment zone, a desorption zone and a cooling zone;

Wherein, the treatment area is connected to the outlet of the pretreatment unit, and is used to receive the organic gas after cooling, dust removal and dehumidification, and the volatile organic compounds in the organic gas are adsorbed and concentrated by the zeolite molecular sieve in the treatment area, wherein , a part of the organic gas after adsorption and concentration is passed into the exhaust unit for discharge, and another part of the organic gas after adsorption and concentration enters the cooling zone as a desorption gas;

When the treatment zone is saturated, the motor drives the zeolite concentration runner to rotate, and the volatile organic compounds adsorbed and concentrated in the treatment zone are transferred to the desorption zone. The desorption zone is used to use clean desorption gas to The adsorbed and concentrated volatile organic compounds are desorbed to form a desorption gas composed of high concentration of volatile organic compounds, and the desorption gas composed of high concentration of volatile organic compounds is passed into the thermal combustion system through the pipeline for combustion. After completion, the desorption zone driven by the motor to complete the desorption is brought into the cooling zone;

The cooling zone adopts the desorption gas introduced from the treatment zone to cool the desorption zone, and the desorption gas introduced into the treatment zone is heated once.

Optionally, the thermal combustion system is also connected to the outlet of the cooling zone through a pipeline, which is used to heat up the desorbed gas introduced into the treatment zone twice, and pass the desorption gas introduced into the treatment zone through a pipeline. The desorbed gas is passed into the desorption zone to obtain a desorption gas composed of high-concentration volatile organic compounds, so as to recover heat energy to maintain the circulating operation of the main working unit.

Optionally, the residence time of the high-concentration volatile organic compound desorbed gas in the thermal combustion device is more than 2 s, which is used to improve the combustion treatment efficiency of the volatile organic compound in the high-concentration desorbed gas.

Optionally, the thermal combustion system includes: a low nitrogen burner and a heat exchange device.

Optionally, the exhaust unit includes a fan and an exhaust duct.

On the other hand, an embodiment of the present application provides an organic gas processing method, and the organic gas processing system described in any one of the above includes:

Pass low-concentration and dust-containing warm and humid organic gas into the pretreatment unit for cooling, dehumidification and dust removal;

The organic gas after cooling, dehumidification and dust removal is passed into the main working unit for purification;

The purified organic gas is discharged;

Wherein, the organic gas after cooling, dehumidification and dust removal is passed into the main working unit for purification, including:

The zeolite molecular sieve in the treatment area is used to adsorb and concentrate the volatile organic compounds in the organic gas. A part of the organic gas after adsorption and concentration is passed into the exhaust unit for discharge, and the other part of the organic gas after adsorption and concentration enters the cooling zone as a desorption gas. ;

When the treatment zone is saturated, the volatile organic compounds obtained by the adsorption and concentration of the treatment zone are desorbed with clean desorption gas through the desorption zone to form a desorption gas composed of high-concentration volatile organic compounds. The formed desorption gas is fed into the thermal combustion system for combustion, and when the desorption is completed, the desorption zone where the desorption has been completed is transferred to the cooling zone with the rotation of the motor;

The desorption zone where the desorption has been completed is cooled by using the desorption gas introduced from the treatment zone in the cooling zone.

The embodiments of the present invention provide detection, monitoring, control and recording of main devices of a pure dry processing system and method suitable for dust-containing, low-concentration, high-air volume, warm-humid organic gases through personnel manipulation or autonomous work. The intelligentization of the pure dry treatment system is realized through the control system, which can meet the treatment of organic gases with different dust content, concentration, air volume, temperature and humidity, and improve the applicability range and work efficiency of the equipment. Through parameter design and intelligent control, To achieve the production needs of different processing capacities for the harmless treatment of organic gases.

Description of drawings

The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the invention and together with the description serve to explain the principles of the invention.

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the accompanying drawings that need to be used in the description of the embodiments or the prior art. In other words, on the premise of no creative labor, other drawings can also be obtained from these drawings.

1 is a schematic diagram of an organic gas processing system provided by an embodiment of the present application;

FIG. 2 is a flowchart of an organic gas processing method provided by an embodiment of the present application.

Detailed ways

In order to make the purposes, technical solutions and advantages of the embodiments of the present invention clearer, the technical methods in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments It is only a part of the embodiments of the present invention, but not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without making creative work results fall within the protection scope of the present invention.

It should be noted that if there are directional indications (such as up, down, left, right, front, back, etc.) involved in the embodiments of the present invention, the directional indications are only used to explain the relationship between the various components under a certain posture. The relative positional relationship, the movement situation, etc., if the specific posture changes, the directional indication also changes accordingly.

FIG. 1 is a schematic diagram of an organic gas processing system provided by an embodiment of the present application. As shown in FIG. 1 , an organic gas processing system provided by an embodiment of the present application includes: a control system 4 , and a control system 4 The connected pretreatment unit 1, the main working unit 2 and the exhaust unit 3;

The pretreatment unit 1 is used for cooling, dehumidifying and dusting the received organic gas;

The pretreatment unit 1 is connected with the main working unit 2, and is used to pass the organic gas after cooling, dehumidification and dust removal into the main working unit 2 for purification, and the main working unit 2 is connected with the exhaust unit 3, which is used for cleaning the organic gas. Exhaust through the exhaust unit.

As shown in FIG. 1 , the pretreatment unit in this embodiment includes: a dehumidification device 11 , a heat exchange device 12 and a dust removal device 13 ;

It should be noted that the heat exchange device 12 can cool the organic gas to achieve the efficient operating temperature range of the concentration wheel; the dehumidification device 11 can dry the organic gas and reduce the humidity to achieve the efficient operation humidity range of the concentration wheel; the dust removal device 13 It is used for the capture and purification of particulate matter in organic gas, which can remove particulate matter in organic gas, so that the particle size of the particulate matter is less than 1 micron. The connection sequence of the above three devices can be changed according to the characteristics of the organic gas to achieve the optimal state.

As an example, the end of the dehumidification device 11 is provided with a pipe for receiving organic gas, and the other end of the dehumidification device 11 is connected to the heat exchange device 12 for passing the dried and dehumidified organic gas into the heat exchange device 12 for cooling. , the heat exchange device 12 is connected to the dust removal device 13 for removing the particulate matter in the cooled organic gas.

Specifically, the dehumidification device may be a physical dehumidification (cooling dehumidification) device and a chemical dehumidification device. Physical dehumidification equipment includes cooling method equipment and compression cooling method equipment. Chemical dehumidification devices include wet dehumidification devices and dry dehumidification devices.

As shown in FIG. 1 , the heat exchange device 12 includes: a heat exchanger 121 , a water pump 122 and a cold water reservoir 123 that are connected in a cycle; one end of the heat exchanger 121 is also connected to a dehumidification device for dehumidifying the dehumidified organic gas. For cooling, the other end of the heat exchanger 121 is connected to the dust removal device, and is used for passing the cooled organic gas into the dust removal device.

The heat exchanger in this embodiment adopts heat exchanger non-contact heat exchange, and the cooling medium is water or air, which can cool the organic gas at 50-400°C to within 50°C. Due to the use of non-contact water/air, it is kept clean and can be reused, which greatly reduces water consumption. At the same time, the waste heat of organic gas is recycled and supplied to the factory, which can reduce energy consumption and achieve energy saving and emission reduction benefits. The water pump provides power for circulating cooling water. The dry dehumidification device includes a runner type device and a fixed type device. The runner type device includes a lithium chloride runner, a high-efficiency silica gel runner and a molecular sieve runner. The main energy consumption of the rotary dehumidifier is the hot air required for regenerating the adsorption runner, and the heat source for heating the regeneration air can be the organic gas in the heat exchange device, so the dehumidification cost is low.

The dust removal device 13 in this embodiment may be a gravity settling type dust collector (such as a flue gas settling chamber, etc.), a mechanical type dust collector (such as an inertial separation type dust collector, a centrifugal dust collector, etc.), an electrostatic precipitator, an ultrasonic dust collector, etc. , filter dust collector (such as bag filter, etc.), wet scrubber dust collector, high gradient magnetic separator, charged bag filter, charged droplet scrubber, etc. Taking into account the characteristics of organic gases, filter dust collectors are often used at lower particle concentrations.

As shown in FIG. 1 , the main working unit 2 includes: a zeolite concentration runner 21 , a motor 22 and a thermal combustion system 23 ;

One end of the zeolite concentration runner 21 is connected to the dust removal device 13, which is used to adsorb and concentrate the volatile organic compounds in the organic gas after cooling, dehumidification and dust removal, and then use the clean desorption gas to adsorb and concentrate the volatile organic compounds on the runner. Desorption is performed to obtain desorption gas composed of high-concentration volatile organic compounds. The other end of the zeolite concentration runner 21 is connected to the thermal combustion system 23 for passing the adsorbed and concentrated desorption gas into the thermal combustion system for purification. In addition, the motor 22 is used to control the rotation of the zeolite concentration rotor 21 .

In this embodiment, the zeolite concentration runner includes: a treatment zone, a desorption zone and a cooling zone;

The treatment area is connected to the outlet of the pretreatment unit, and the volatile organic compounds in the organic gas are adsorbed and concentrated by the porous adsorption properties of the zeolite molecular sieve, wherein a part of the organic gas after adsorption and concentration is passed into the exhaust unit for discharge, and another part of the organic gas after adsorption and concentration enters the cooling zone as a desorption gas;

When the treatment zone is saturated, the motor drives the zeolite concentration wheel to rotate, and the volatile organic compounds adsorbed and concentrated in the treatment zone are transferred to the desorption zone.

It should be noted that the treatment area is provided with an organic gas inlet, which is connected to the outlet of the pretreatment unit. In this area, the VOCs in the organic gas are adsorbed and concentrated by the porous adsorption of zeolite molecular sieves, and the adsorption efficiency can reach 99%. Part of the gas enters the cooling zone through the pipeline to become desorbed gas, and the flow rate of the desorbed gas is more than 1/6 of the flow rate of the organic gas; the other part is discharged through the chimney; when the adsorption zone of the runner is saturated, the adsorbed volatile organic compounds in this zone will follow. The motor drives the rotation to enter the desorption zone, and the adjacent cooling zone rotates to the position connected with the outlet pipe of the pretreatment unit to become a new treatment zone, and continues to adsorb volatile organic gases. The pressure drop during the adsorption of VOCs by the zeolite concentration rotor is extremely low, which can greatly reduce the power consumption of the fan.

The desorption zone is used to desorb the adsorbed and concentrated volatile organic compounds with clean desorption gas to form a desorption gas composed of high-concentration volatile organic compounds, and pass the desorption gas composed of high-concentration volatile organic compounds through the pipeline. It enters the thermal combustion system for combustion, and when the desorption is completed, the desorption zone driven by the motor to complete the desorption is brought into the cooling zone;

It should be noted that the desorption gas at 100-300°C passes through the desorption zone to desorb the high-concentration VOCs adsorbed in the treatment zone to form a high-concentration VOCs desorption gas, which enters the pipeline connected to the thermal combustion system; After the desorption of the zone is completed, the zone is driven by the motor to rotate into the cooling zone, and the adjacent treatment zone is rotated to the position connected with the inlet pipe of the thermal combustion system to become a new desorption zone. Improve the absorption and desorption efficiency, so that the original low concentration and large air volume VOCs organic gas can be converted into high concentration and small air volume desorption gas, and the concentration ratio can reach 3-10 times, which greatly reduces the specifications and fixed investment of back-end final treatment equipment. and running costs.

In the cooling zone, the desorption gas introduced from the treatment zone is used to cool the desorption zone, and the desorption gas is heated once.

In this embodiment, the purpose of designing the cooling zone is to lower the temperature of the desorption zone where the desorption is completed, so as to achieve the optimum temperature range for the adsorption effect of the treatment zone. Part of the purified gas below 50°C discharged from the treatment zone enters the cooling zone to cool the desorption zone where the desorption has been completed, and at the same time complete the first-stage heating of the desorbed gas step-up heating.

It should be noted that when the cooling zone is finished cooling, the zone is driven by the motor to enter the treatment zone, and the adjacent desorption zone is rotated to the position connected to the outlet pipe of the treatment zone to become a new cooling zone. So far, the zeolite concentration wheel has completed a cycle.

The thermal combustion device in this embodiment is used for incinerating high-concentration desorbed gas in the furnace to complete the entire purification process, with a combustion efficiency of 95%.

Low-nitrogen burner The thermal combustion system adopts a low-nitrogen burner, which can inhibit the generation of pollutants during the combustion process and achieve emission reduction benefits. It can reach the high-efficiency operating temperature range of 100-300 ℃ desorption, and the whole device maintains the operation of the system by recovering heat energy to achieve energy-saving benefits.

The thermal combustion system in this embodiment is also connected to the outlet of the cooling zone through a pipeline, which is used to heat up the desorption gas introduced from the treatment zone twice, and pass the desorption gas introduced from the treatment zone through a pipeline. Enter the desorption zone to obtain desorption gas composed of high concentration of volatile organic compounds, so as to recover heat energy to maintain the circulating operation of the main work unit. In this embodiment, the residence time of the high-concentration volatile organic compound desorbed gas in the thermal combustion device is more than 2s, which is used to improve the combustion treatment efficiency of the volatile organic compound in the high-concentration desorbed gas.

In this embodiment, the thermal combustion system includes: a low nitrogen burner and a heat exchange device.

In this embodiment, the exhaust unit includes a fan and an exhaust duct. The fan provides the flow power for the gas in the pipe network; the chimney provides the ventilation structure for the purified organic gas. Considering the integration, the purified organic gas at the outlet of the runner treatment area and the flue gas generated by the combustion device are discharged together. Since the organic gas has been dehumidified and the water vapor produced by the combustion is very small, there is basically no "dehumidification" in the emission. De-whitening "demand, reduce the fixed investment of exhaust unit.

The fan includes an organic gas induced draft fan 31 and a desorbed gas induced draft fan 32 . The organic gas induced draft fan 31 is installed in the organic gas pipeline with low concentration and large air volume; the desorption gas induced draft fan 32 is installed in the desorption gas pipeline.

In addition, the control system 1 in this embodiment is used for the detection, control, adjustment and early warning of the organic gas composition and concentration, temperature, pressure, flow and other parameters in the process flow, so as to improve system reliability, intelligence level and security performance, and reduce manpower Cost, wireless control, remote monitoring, autonomous work or manual operation, and the entire equipment is powered by an energy system; the system includes a preprocessing control system 41, a main work control system 42, and an exhaust control system 43.

The pretreatment control system 41 can detect, monitor, control, adjust and record the organic gas composition and concentration, temperature, pressure, flow and other parameter data in the pretreatment process, and form feedback with each link of the organic gas treatment system to ensure the system pretreatment process. Safe and efficient. These data are input into the control system, and the software completes the relevant thermal calculations, and adjusts the cold source flow and the desorption gas flow of the pretreatment unit heat exchange device by controlling the fan power. The pretreatment control system 41 includes an on-line detection system for flue gas inlet, which is used to monitor whether the flue gas entering the main equipment meets the standard, so as to avoid damage to the equipment, increase the operating life of the equipment, reduce maintenance and downtime, and reduce labor costs.

The main body work control system 42 can detect, monitor, control, adjust and record the organic gas composition and concentration, temperature, pressure, flow and other parameter data in the main body work process, and form feedback with each link of the organic gas treatment system to ensure the system pretreatment process. Safe and efficient. Motor power, speed, and low nitrogen burner power are adjustable and controllable.

The exhaust control system 43 can detect, monitor, control, adjust and record the organic gas composition and concentration, temperature, pressure, flow and other parameter data in the exhaust process, control the process trial operation and discharge standards, and form a combination with each link of the organic gas treatment system. Feedback to ensure the safe and efficient process of system preprocessing. The exhaust control system 43 includes an on-line detection system for the flue gas outlet, which is used to monitor whether the purified gas meets the emission standard, and can detect the organic gas composition and the concentration, molecular weight, boiling point, etc., odor concentration, temperature, humidity, etc. of each component.

The present invention can reduce the dust content, temperature and humidity of organic gas through the pretreatment unit, so as to reach the optimal operating range of the main work unit; the organic gas treatment efficiency of the main work unit of the present invention can reach 95%, which can greatly reduce the emission of pollutants The present invention adopts the pure dry process method, and there is basically no demand for "dehumidification and whitening" after purification, which greatly reduces water consumption and reduces the fixed investment, operation cost, floor space and weight of "dehumidification and whitening"; the present invention There are two heat exchange devices, which can meet the production needs of efficient recovery and utilization of waste heat, improve the utilization efficiency of waste heat resources in the system, and greatly reduce power consumption and operating costs.

FIG. 2 is a flowchart of a method for processing organic gas provided by an embodiment of the application. As shown in FIG. 2 , the method includes:

Step S11, passing the low-concentration and dust-containing warm-humid organic gas into the pre-processing unit for cooling, dehumidification and dust removal;

Specifically, first, a dehumidification device is used to dry and dehumidify the organic gas; secondly, a heat exchange device is used to cool the dried and dehumidified organic gas; finally, a dust removal device is used to remove particulate matter from the cooled organic gas.

Step S12, passing the organic gas after cooling, dehumidification and dust removal into the main working unit for purification;

Specifically, the volatile organic compounds in the organic gas are adsorbed and concentrated by using the zeolite molecular sieve in the treatment zone, a part of the organic gas after adsorption and concentration is passed into the exhaust unit for discharge, and the other part of the organic gas after adsorption and concentration enters the cooling zone as a desorbed gas;

When the treatment zone is saturated, the volatile organic compounds obtained by the adsorption and concentration of the treatment zone are desorbed with clean desorption gas through the desorption zone to form a desorption gas composed of high-concentration volatile organic compounds. The formed desorption gas is fed into the thermal combustion system for combustion, and when the desorption is completed, the desorption zone where the desorption has been completed is transferred to the cooling zone with the rotation of the motor;

In the cooling zone, the desorption gas is introduced into the desorption zone from the treatment zone to cool down the desorption zone where the desorption has been completed.

In this way, a working cycle of the zeolite concentration runner is completed, so as to achieve the effect of purifying the organic gas after cooling, dehumidification and dust removal.

In step S13, the purified organic gas is discharged.

The specific embodiments of the invention are described above in detail, but as an example, the present invention is not limited to the specific embodiments described above. For those skilled in the art, any equivalent modification or substitution of the invention is also within the scope of the present invention, therefore, the equivalent transformation, modification and improvement made without departing from the spirit and principle scope of the present invention etc., should be included in the scope of the present invention.

Claims (10)

1. An organic gas processing system, comprising: a control system, and a pretreatment unit, a main work unit and an exhaust unit connected with the control system; The pretreatment unit is used for cooling, dehumidifying and dusting the received organic gas; The pretreatment unit is connected to one end of the main working unit, and is used to pass the organic gas after cooling, dehumidification and dust removal into the main working unit, and is purified by the zeolite concentration runner in the main working unit. The other end of the main working unit is connected to the exhaust unit for discharging the organic gas purified by the zeolite concentration runner. 2. The system according to claim 1, wherein the pretreatment unit comprises: a dehumidification device, a heat exchange device and a dust removal device; One end of the dehumidification device is provided with a pipeline for receiving organic gas, and the other end of the dehumidification device is connected to the heat exchange device for passing the dried and dehumidified organic gas into the heat exchange device for cooling , the heat exchange device is connected with the dust removal device, and is used for removing particulate matter in the cooled organic gas. 3. The system according to claim 2, wherein the heat exchange device comprises: a cyclically connected heat exchanger, a water pump and a cold water reservoir; One end of the heat exchanger is also connected to the dehumidification device for cooling the dehumidified organic gas, and the other end of the heat exchanger is connected to the dust removal device for cooling the dehumidified organic gas. The gas is passed into the dust removal device. 4. The system according to claim 2, wherein the main working unit comprises: a zeolite enrichment runner and a thermal combustion system; One end of the zeolite concentration runner is connected with the dust removal device, which is used for adsorption and concentration of volatile organic compounds in the organic gas after cooling, dehumidification and dust removal, and then the volatile organic compounds obtained by adsorption and concentration on the runner are absorbed and concentrated by the clean desorption gas. The desorption of volatile organics is carried out to obtain a desorbed gas composed of high-concentration volatile organics, and the other end of the zeolite concentration runner is connected to the thermal combustion system for passing the obtained desorbed gas into the thermal combustion. The system is cleaned. 5. The system according to claim 4, wherein the zeolite concentration runner comprises: a treatment zone, a desorption zone and a cooling zone; Wherein, the treatment area is connected to the outlet of the pretreatment unit, and is used to receive the organic gas after cooling, dust removal and dehumidification, and the volatile organic compounds in the organic gas are adsorbed and concentrated by the zeolite molecular sieve in the treatment area, wherein , a part of the organic gas after adsorption and concentration is passed into the exhaust unit for discharge, and another part of the organic gas after adsorption and concentration enters the cooling zone as a desorption gas; When the treatment zone is saturated, the motor drives the zeolite concentration runner to rotate, and the volatile organic compounds adsorbed and concentrated in the treatment zone are transferred to the desorption zone. The desorption zone is used to use clean desorption gas to The adsorbed and concentrated volatile organic compounds are desorbed to form a desorption gas composed of high concentration of volatile organic compounds, and the desorption gas composed of high concentration of volatile organic compounds is passed into the thermal combustion system through the pipeline for combustion. After completion, the desorption zone driven by the motor to complete the desorption is brought into the cooling zone; The cooling zone adopts the desorption gas introduced from the treatment zone to cool the desorption zone, and the desorption gas introduced from the treatment zone is heated once. 6 . The system according to claim 5 , wherein the thermal combustion system is further connected to the outlet of the cooling zone through a pipeline, so as to perform secondary heating of the desorbed gas introduced from the treatment zone. 7 . , and pass the desorption gas from the treatment zone into the desorption zone through a pipeline to obtain a desorption gas composed of high-concentration volatile organic compounds, thereby recovering heat energy to maintain the main working unit circulating operation. 7 . The system according to claim 5 , wherein the residence time of the desorbed gas of the high-concentration volatile organic compound in the thermal combustion device is more than 2s, which is used to improve the volatilization of the high-concentration desorbed gas. 8 . Efficiency of Combustion Treatment of Sexual Organics. 8. The system of claim 5, wherein the thermal combustion system comprises: a low nitrogen burner and a heat exchange device. 9. The system of claim 1, wherein the exhaust unit comprises a fan and an exhaust duct. 10. A method for processing organic gas, using the processing system for organic gas according to any one of claims 1-9, characterized in that, comprising: Pass low-concentration and dust-containing warm and humid organic gas into the pretreatment unit for cooling, dehumidification and dust removal; The organic gas after cooling, dehumidification and dust removal is passed into the main working unit for purification; The purified organic gas is discharged; Wherein, the organic gas after cooling, dehumidification and dust removal is passed into the main working unit for purification, including: The zeolite molecular sieve in the treatment area is used to adsorb and concentrate the volatile organic compounds in the organic gas. A part of the organic gas after adsorption and concentration is passed into the exhaust unit for discharge, and the other part of the organic gas after adsorption and concentration enters the cooling zone as a desorption gas. ; When the treatment zone is saturated, the volatile organic compounds obtained by the adsorption and concentration of the treatment zone are desorbed with clean desorption gas through the desorption zone to form a desorption gas composed of high-concentration volatile organic compounds. The formed desorption gas is fed into the thermal combustion system for combustion, and when the desorption is completed, the desorption zone where the desorption has been completed is transferred to the cooling zone with the rotation of the motor; The desorption zone where the desorption has been completed is cooled by using the desorption gas introduced from the treatment zone in the cooling zone.

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