A mobile prying device for treating and recycling polluted gas and a treatment method

Abstract

The present application belongs to the field of contaminated gas treatment, and particularly relates to a mobile prying device for contaminated gas treatment and resource utilization and a treatment method. The prying device comprises a treatment unit for treating contaminated gas, a resource utilization unit for condensing and resource utilization of the contaminated gas, a regeneration unit for regeneration of a dehydration tower in the device, and a PLC control unit. The treatment unit is connected with the resource utilization unit. The regeneration unit is connected with the treatment unit, the resource utilization unit and the PLC control unit respectively. The PLC control unit is connected with the treatment unit and the resource utilization unit respectively. The prying device is a mobile prying device for multi-tower treatment and resource utilization of gaseous pollutants. The prying device can continuously treat contaminated gas, can ensure ultra-low emission of the contaminated gas, does not produce secondary pollutants such as waste water and waste gas, and more importantly, can resource utilize the contaminated gas, thereby realizing resource utilization treatment, and has the advantages of compact structure, low treatment cost, easy movement, realization of resource utilization of contaminated gas and the like.

Description

Technical Field

[0001] This invention belongs to the field of polluted gas treatment, specifically relating to a skid-mounted device and treatment method for mobile polluted gas treatment and resource recovery. Background Technology

[0002] SO2 in flue gas can be directly used to produce sulfuric acid, or the sulfur-rich desorbed gas can be further purified into high-purity SO2 products for the production of various sulfites, gelatin, adhesives, etc., and can also be used as a solvent, bleaching agent, disinfectant, and oxidant. NO2 can be used to manufacture nitric acid, nitrifying agents, oxidants, catalysts, polymerization inhibitors, and rocket fuel oxidants. Currently, there are many methods for treating gaseous pollutants, commonly including absorption, adsorption, catalysis, combustion, and condensation. Traditional gaseous pollutant emission reduction technologies usually convert gaseous pollutants into harmless compounds. Among them, adsorption can both thoroughly eliminate gaseous pollutant pollution and recycle gaseous pollutants, and is considered a promising technology. The combined production process of condensation and adsorption is becoming a trend. Advanced NO X Desorption technology and efficient adsorbent regeneration technology are key steps for the successful practical application of adsorption methods. Commonly used adsorbents include molecular sieves, silica gel, and activated carbon. However, the large quantity of adsorbents required results in bulky equipment, high investment, and high power consumption. The regeneration process after adsorption necessitates specialized equipment and systems to supply regeneration media such as steam and hot air, significantly increasing equipment and operating costs and limiting the widespread use of adsorption methods. Furthermore, traditional devices are mostly fixed, complex to install, and inconvenient to move, making them unsuitable for emergency treatment or on-site disposal facilities requiring relocation.

[0003] One existing technology discloses a mobile on-site rapid purification and treatment device for polluted gas, including a mobile trailer that can be moved to the site of the polluted gas. The trailer is equipped with a main control box powered by a mobile power supply, a composite filter box, a thermal purification box, a liquid adsorption box, and a negative pressure fan. The main control box controls the purification and treatment of the polluted gas. The air inlet duct of the composite filter box draws in the polluted gas from the site. The gas passes through a breathable filter cloth and a microporous filter material to filter out particulate pollutants and is then sent to the thermal purification box. The gas enters the incineration chamber for thermal decomposition and catalytic adsorption. After being cooled by the heat dissipation chamber, the gas enters the liquid adsorption box. Inside the liquid adsorption box, there are washing filter materials, neutralizing liquid, a spray water pump, and atomizing nozzles to complete the final absorption and purification. After that, the negative pressure fan safely discharges the clean gas from the outlet pipe, completing the purification process.

[0004] Existing technology two discloses a low-emission mobile medical waste incineration tail gas treatment device, including: a flue gas heat exchanger, a quench tower, a flue gas purification tower, a flue gas temperature controller, a bag filter, an induced draft fan, an exhaust pipe, and a flue gas regulating valve, installed inside a heavy-duty truck or container. When applied to practical applications, it can reduce the emissions of residual acidic gases, dioxins, nitrogen oxides, and other pollutants from medical waste, while achieving zero wastewater discharge during the treatment process.

[0005] Existing technology three discloses a device for the resource-based treatment of nitrogen oxide waste gas using electrochemical reduction technology coupled with gas-liquid separation membrane technology. It includes an electrochemical reactor consisting of a cathode gas chamber, a gas diffusion cathode, a cathode liquid chamber, an anion exchange membrane, a gas diffusion anode, and an anolyte chamber sequentially bonded together, and an ammonia recovery device connected to the cathode liquid chamber via a conveying pipeline. It also includes an inlet system connected to the cathode gas chamber, an electrolyte inlet system connected to the anolyte chamber, and a power supply connected to the gas diffusion cathode and gas diffusion anode. The ammonia recovery device contains a hollow fiber membrane, with the electrolyte input from the cathode liquid chamber passing through one side and the absorbent passing through the other side. This device has low energy consumption for treating nitrogen oxide waste gas, high electrode activity, selectivity, and resource-based treatment efficiency, and no secondary pollution, making it suitable for industrial application. It can effectively reduce the energy consumption for treating nitrogen oxides in industrial flue gas, and its high electrode performance enables efficient and selective conversion of nitrogen oxides to ammonia and efficient recovery of ammonia obtained from the selective conversion of nitrogen oxides.

[0006] Of the existing technologies mentioned above, while technologies one and two offer convenient transportation and flexible operation, overcoming the limitations of time and location constraints, they do not achieve resource recovery of pollutants. Technology three, although it achieves resource recovery of nitrogen oxides, uses acid absorption, which suffers from problems such as large reagent consumption and unstable effectiveness. Furthermore, the corrosive nature of the acid places high demands on the materials used in the equipment, resulting in significant investment and difficulties in maintenance. Summary of the Invention

[0007] To address the aforementioned problems, this invention proposes a mobile skid-mounted device and method for treating and recycling pollutants. The skid-mounted device is a mobile skid-mounted unit for multi-tower treatment and resource recycling of gaseous pollutants. This device can continuously treat pollutants, ensuring ultra-low emissions and preventing the generation of secondary pollutants such as wastewater and exhaust gas. More importantly, it can recycle pollutants, achieving resource-based treatment. Furthermore, it boasts advantages such as compact structure, low treatment cost, easy mobility, and the ability to recycle pollutants.

[0008] This invention is achieved through the following technical solution:

[0009] A mobile skid-mounted device for treating polluted gas, the skid-mounted device comprising:

[0010] A processing unit used to treat polluted gases;

[0011] Resource recovery unit for condensing and recovering polluting gases;

[0012] A regeneration unit for regeneration in the dehydration tower within the device; and,

[0013] PLC control unit;

[0014] The processing unit is connected to the resource recovery unit;

[0015] The regeneration unit is connected to the processing unit, the resource recovery unit, and the PLC control unit, respectively.

[0016] The PLC control unit is connected to the processing unit and the resource recovery unit respectively.

[0017] Furthermore, the processing unit includes:

[0018] A pollutant gas condensation system used for condensing pollutant gas feedstock gas;

[0019] A polluted gas dehydration system used to further remove moisture from the raw gas;

[0020] Adsorption-desorption system for adsorbing polluting gases;

[0021] Filtration systems used to filter particulate matter from flue gas;

[0022] A polluted gas flow stabilization system for controlling gas flow rate; and

[0023] A system for pressurizing contaminated gases to control gas pressure;

[0024] The polluted gas condensation system, polluted gas dehydration system, filtration system, flow stabilization system, pressurization system, and adsorption-desorption system are connected in sequence;

[0025] The polluted gas dehydration system is connected to the regeneration unit;

[0026] The adsorption-desorption system is connected to the resource recovery unit.

[0027] Furthermore, the pollutant gas condensation system includes

[0028] The first condenser for condensing the raw gas; and

[0029] A first gas-liquid separator used to store the liquid generated from the condensation of raw material gas;

[0030] The first condenser is connected to the first gas-liquid separator;

[0031] The first gas-liquid separator is connected to the polluted gas dehydration system.

[0032] Furthermore, the polluted gas dehydration system includes at least two first dehydration towers connected in parallel;

[0033] The inlet of the first dehydration tower is connected to the polluted gas condensation system, and the outlet is connected to the filtration system.

[0034] The at least two parallel first dehydration towers are used alternately.

[0035] Furthermore, the filtration system includes a filter for filtering residual particulate matter in the dehydrated gas;

[0036] The filter's inlet is connected to the polluted gas dehydration system, and its outlet is connected to the flow stabilization system.

[0037] Furthermore, the current stabilization system includes:

[0038] A mass flow controller for controlling the flow rate of gas entering the adsorption-desorption system;

[0039] The mass flow controller's inlet is connected to the filtration system, and its outlet is connected to the pressurization system.

[0040] Furthermore, the pressurization system includes

[0041] Booster fans used to increase the pressure of polluted gases;

[0042] The air inlet of the booster fan is connected to the flow stabilization system, and the air outlet is connected to the adsorption-desorption system.

[0043] Furthermore, the adsorption-desorption system includes

[0044] At least three adsorption towers connected in parallel for adsorbing pollutant gases;

[0045] A flue gas flow meter used to measure the flow rate of circulating desorption gas;

[0046] Adsorption tower heaters used to heat adsorption towers;

[0047] A second condenser for condensing the desorbed gas;

[0048] Vacuum diaphragm pumps used for system circulation desorption gas;

[0049] A second gas-liquid separator used to store the liquid (water) condensed from the desorbed gas by the second condenser;

[0050] Gas bags used to store desorbed gas;

[0051] One end of the adsorption tower is connected to the pressurization system and one end of the vacuum diaphragm pump, and the other end is connected to the adsorption tower heater.

[0052] The other end of the vacuum diaphragm pump is connected to one end of the flue gas flow meter;

[0053] The other end of the flue gas flow meter is connected to one end of the adsorption tower heater and the second condenser, respectively.

[0054] The other end of the second condenser is connected to one end of the second gas-liquid separator;

[0055] The other end of the second gas-liquid separator is connected to one end of the gas bag;

[0056] The other end of the air bag is connected to the resource recovery unit;

[0057] During desorption, the desorbed gas circulates in the adsorption tower, vacuum diaphragm pump, flue gas flow meter and heater. After desorption is completed, the desorbed gas enters the second condenser, and the cooled desorbed gas enters the gas bag through the gas-liquid separator.

[0058] Furthermore, the adsorption tower is replaced with a catalytic tower or an absorption tower to adapt to the treatment of different pollutants (polluting gases).

[0059] Furthermore, the flue gas flow meter is a metal tube float flow meter, which adopts an all-metal structure and is suitable for high-temperature, high-pressure and highly corrosive media; because desorption requires heating, and the temperature is high and some gaseous pollutants are corrosive, the flue gas flow meter adopts a metal tube float flow meter.

[0060] Furthermore, the resource recovery unit includes:

[0061] Desorption gas dehydration system for desorption gas dehydration;

[0062] Desorption gas pressurization system used to increase the pressure of desorption gas;

[0063] A desorbed gas condensation system for condensing desorbed gas;

[0064] A desorption gas pressure stabilization system for controlling the desorption gas pressure in the resource recovery unit;

[0065] Desorption gas flow stabilization system for controlling the desorption gas flow rate in the resource recovery unit;

[0066] A refrigeration system used to provide cooling capacity to a desorbed gas condensation system;

[0067] Storage systems used for storing products;

[0068] The desorbed gas dehydration system, desorbed gas pressurization system, desorbed gas condensation system, and storage system are connected in sequence.

[0069] The desorbed gas condensation system is connected to the desorbed gas pressure stabilization system and the desorbed gas flow stabilization system, respectively.

[0070] The refrigeration system is connected to the desorbed gas condensation system.

[0071] Furthermore, the desorbed gas dehydration system includes at least one second dehydration tower, one end of which is connected to the adsorption-desorption system, and the other end is connected to the regeneration unit and the desorbed gas pressurization system, respectively.

[0072] Furthermore, the desorbed gas pressurization system includes an oil-free air compressor, one end of which is connected to the desorbed gas dehydration system and the other end of which is connected to the desorbed gas condensation system; the maximum pressure (maximum range) of the oil-free air compressor is 0.8 MPa.

[0073] Furthermore, the desorbed gas condensation system includes a primary cryostat and a secondary cryostat, which are connected in series.

[0074] The desorbed gas in the gas bag is dehydrated by the second dehydration tower and then pressurized and collected by an oil-free air compressor. After being depressurized by the pressure reducing valve of the desorbed gas pressure stabilization system, it enters the first-stage cryogenic unit for low-temperature pressurization and deep cooling. The cooled liquid enters the storage system for storage, while the uncooled gas enters the second-stage cryogenic unit for pressurization and deep cooling. The liquid enters the product storage tank. The pressure of the first and second-stage cryogenic units is controlled by the back pressure valve of the desorbed gas pressure stabilization system. The remaining gas after condensation is directly discharged.

[0075] Furthermore, the desorption gas pressure stabilization system includes

[0076] A pressure reducing valve for reducing the pressure of the desorbed gas entering the desorbed gas condensation system; and,

[0077] A back pressure valve used to control the pressure of the desorbed gas condensation system;

[0078] The pressure reducing valve is located at the inlet end of the desorbed gas condensation system;

[0079] The back pressure valve is located at the outlet of the desorption gas condensation system.

[0080] Furthermore, the desorption gas flow stabilization system includes

[0081] A gear flow meter used to measure the flow rate of refrigerant (provided by the refrigeration system) circulating within the desorbed gas condensation system;

[0082] A metal tube rotor flowmeter used to measure the flow rate of condensed gas;

[0083] The gear flow meter is installed at the inlet end of the desorption gas condensation system;

[0084] The metal tube rotor flowmeter is installed at the outlet end of the desorption gas condensation system.

[0085] Furthermore, the refrigeration system includes a cryogenic cold trap, the temperature range of which is -30°C to room temperature.

[0086] Furthermore, the storage system includes product storage tanks.

[0087] Furthermore, the regeneration unit includes

[0088] Regenerator blower for purging air passages; and

[0089] A regenerator used to heat the purge gas;

[0090] The inlet of the regenerator is connected to the regenerator fan, and the outlet is connected to the polluted gas dehydration system and the desorbed gas dehydration system, respectively.

[0091] Furthermore, the PLC control unit includes an embedded integrated touch screen and an automatic control module. The automatic control module operates the experimental process and includes the following functions:

[0092] ① It can display process flow diagrams with real-time status data, as well as real-time trend charts and historical trend charts (recorded once per minute). It records reaction temperature, reaction pressure, gas feed rate, etc., and can call up data from any time as needed.

[0093] ② It can record and generate required process data reports at set intervals (intervals can be set);

[0094] ③ It can automatically record all high-limit alarms that occur for key process variables and the alarm clearing time;

[0095] ④ Historical trends, data records, and alarm records for all time periods of the experimental process can be queried online or offline at any time. All of this data is not limited by time duration in principle (only by hard drive capacity).

[0096] ⑤ Establish alarm handling function;

[0097] ⑥ It can display and modify various experimental parameters in real time, such as temperature, flow rate and pressure;

[0098] ⑦ It can realize programmed temperature control of the regeneration heater and adsorption tower heater (including reactor, preheater and vaporizer in the heater) in the evaluation device, as well as flow control of liquid feed rate and gas feed rate.

[0099] Furthermore, the device is also equipped with 7 sampling ports, which can respectively collect samples in the following states: before dehydration, before denitrification, after denitrification, during purge gas, during desorption, after desorption, and after condensation.

[0100] Another object of the present invention is to provide a mobile method for treating polluted gas, wherein the method employs the above-mentioned skid-mounted device, and the method includes the following steps:

[0101] S1 Raw Material Gas Treatment: The raw material gas containing gaseous pollutants is condensed by the first condenser and then enters the first dehydration tower for dehydration through the first gas-liquid separator. After passing through the filter and mass flow controller, it enters the adsorption tower under the action of the booster fan.

[0102] The remaining raw gas after adsorption is used as a gas source to desorb the adsorption tower that is saturated with adsorption, or to purge the adsorption tower that has completed desorption and cool it down.

[0103] S2 adsorption saturation adsorption tower desorption: turn on the adsorption tower heater and vacuum diaphragm pump, and the gas forms a gas desorption cycle between the adsorption tower, adsorption tower heater and vacuum diaphragm pump;

[0104] When the pressure in the gas circuit exceeds the set pressure, the pressure in the gas circuit will be automatically discharged, condensed by the second condenser, and then enter the gas bag through the second gas-liquid separator.

[0105] S3 Resource Utilization: The desorbed gas in the gas bag is dehydrated by the second dehydration tower and then pressurized and collected by an oil-free air compressor. After being depressurized by a pressure reducing valve, it enters the first-stage cryogenic unit for low-temperature pressurization and deep cooling. The cooled liquid enters the product storage tank, while the uncooled gas enters the second-stage cryogenic unit for pressurization and deep cooling, and the liquid enters the product storage tank.

[0106] The pressure of the first and second stage cryogenic reactors is controlled by a back pressure valve. The condensed gas is directly discharged, and the flow rate of the condensed gas is measured by a metal tube rotor flow meter.

[0107] Furthermore, the raw material gas is SO2, CO2, or VOCs.

[0108] Furthermore, the mass flow controller is configured with a flow range of 0–10 L / min.

[0109] Furthermore, the specific content of S3 includes:

[0110] Before the desorbed gas is recycled, the temperature of the refrigeration system (low-temperature cold trap) is set to reach the set temperature, and the refrigeration system transfers the cooling capacity to the desorbed gas condensation system.

[0111] Once the temperatures of the refrigeration system and the desorbed gas condensation system stabilize, the desorbed gas in the gas bag is sent to the desorbed gas dehydration system for dehydration. After fine dehydration, the desorbed gas is pressurized by the desorbed gas pressurization system and then enters the desorbed gas condensation system for condensation to obtain liquid product gas. The remaining gas after condensation is discharged.

[0112] Furthermore, after the first and second dehydration towers become saturated with adsorption, they are regenerated by the regeneration unit.

[0113] The mobile skid-mounted device and method for treating and recycling polluted gas according to the present invention have at least the following beneficial technical effects:

[0114] (1) While purifying gaseous pollutants in flue gas by adsorption, gaseous pollutants are recovered without damage to obtain gaseous pollutant resource products, which have environmental and economic benefits and can offset certain operating costs.

[0115] (2) Study the effect of adsorbent materials on the adsorption and desorption of gaseous pollutants. Different adsorbents are replaced according to different pollutants. The adsorption and desorption of different gaseous pollutants by different adsorbent materials can be detected. The adsorption and desorption of different gaseous pollutants by the same adsorbent material can also be detected.

[0116] (3) Study the gaseous pollutants in industrial flue gas from different industries such as thermal power, steel, glass, ceramics, cement and coking.

[0117] (4) The oxidation, adsorption, desorption and adsorbent regeneration processes of flue gas pollutants are realized in one tower, and the switching between the oxidation, adsorption, desorption and adsorbent regeneration processes of gaseous pollutants between different tower reactors can be realized.

[0118] (5) When the volume of gaseous pollutants is large, the number of towers can be increased to complete the adsorption, desorption and cooling steps simultaneously.

[0119] (6) The skid-mounted device is flexible and mobile, with a small footprint, easy to move, and convenient for maintenance, repair and replacement of consumables.

[0120] (6) The control system adopts automatic software control, which reduces the burden on personnel, has low operation and maintenance costs, and is easy to operate.

[0121] (7) This device can reduce the temperature of flue gas to a lower level, which is a necessary condition for adsorption purification. Adsorption purification also ensures that the low-temperature flue gas will not cause acid corrosion of the pipeline.

[0122] (8) The adsorption tower can be replaced with a catalytic tower or an absorption tower depending on the type of pollutant gas. Different treatment methods can be used for different pollutants (polluting gases).

[0123] (9) The skid-mounted structure of the device can be moved according to the needs of the pollution site. Attached Figure Description

[0124] Figure 1 This is a schematic diagram of a mobile skid-mounted device for treating polluted gas according to an embodiment of the present invention.

[0125] Figure 2This is a schematic diagram of the processing unit structure in an embodiment of the present invention.

[0126] Figure 3 This is a schematic diagram of the structure of the pollutant gas condensation system in an embodiment of the present invention.

[0127] Figure 4 This is a schematic diagram of the regeneration unit, polluted gas dehydration system, filtration system, and flow stabilization system in an embodiment of the present invention.

[0128] Figure 5 This is a schematic diagram of the pressurization system and the adsorption / desorption system in an embodiment of the present invention.

[0129] Figure 6 This is a schematic diagram of the resource utilization unit structure in an embodiment of the present invention.

[0130] Figure 7 This is a schematic diagram of the connection structure of each system in the resource utilization unit in an embodiment of the present invention.

[0131] Explanation of reference numerals in the attached figures:

[0132] 1-PLC control unit;

[0133] 2-Regeneration unit;

[0134] 21-Regenerative air fan;

[0135] 22-Regenerative heater;

[0136] 3-Processing unit;

[0137] 31-Pollution gas condensation system: 311-First condenser, 312-First gas-liquid separator;

[0138] 32-Pollution gas dehydration system: 321-First dehydration tower;

[0139] 33-Filtration system: 331-Filter;

[0140] 34-Pollution gas flow stabilization system: 341-Mass flow controller;

[0141] 35-Pollution gas pressurization system: 351-Booster fan;

[0142] 36-Adsorption-Desorption System: 361-Adsorption Tower, 362-Flue Gas Flow Meter, 363-Adsorption Tower Heater, 364-Second Condenser, 365-Vacuum Diaphragm Pump, 366-Second Gas-Liquid Separator, 367-Gas Bag;

[0143] 4-Resource Utilization Unit;

[0144] 41-Desorption gas dehydration system: 411-Second dehydration tower;

[0145] 42-Desorption air pressurization system: 421-Oil-free air compressor;

[0146] 43-Desorption gas condensation system: 431-First-stage cryocooler, 432-Second-stage cryocooler;

[0147] 44-Desorption gas pressure stabilization system: 441-Pressure reducing valve, 442-Back pressure valve;

[0148] 45-Desorption gas flow stabilization system: 451-Gear flow meter, 452-Metal tube rotor flow meter;

[0149] 46-Refrigeration system: 461-Cryogenic cold trap;

[0150] 47-Storage System: 471-Product Storage Tank. Detailed Implementation

[0151] To make the objectives, technical solutions, and advantages of this invention clearer, the invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.

[0152] Conversely, this invention covers any substitutions, modifications, equivalent methods, and schemes made within the spirit and scope of the invention as defined by the claims. Furthermore, to provide the public with a better understanding of the invention, certain specific details are described in detail below. However, those skilled in the art will fully understand the invention even without these detailed descriptions.

[0153] The following examples illustrate the function of the invention. In these examples, unless otherwise stated, parts are calculated by weight, percentages are calculated by weight percentage, and temperatures are in degrees Celsius. The relationship between fractions by weight and parts by volume is the same as the relationship between grams and cubic centimeters.

[0154] Example 1

[0155] This embodiment proposes a mobile skid-mounted device for treating polluted gas, the skid-mounted device comprising:

[0156] Processing unit 3 for treating polluted gases;

[0157] Resource recovery unit 4 is used to condense and recover polluting gases;

[0158] Regeneration unit 2 for regeneration in the dehydration tower within the device; and,

[0159] PLC control unit 1;

[0160] The processing unit 3 is connected to the resource recovery unit 4;

[0161] The regeneration unit 2 is connected to the processing unit 3, the resource recovery unit 4 and the PLC control unit 1 respectively;

[0162] The PLC control unit 1 is connected to the processing unit 3 and the resource utilization unit 4 respectively.

[0163] The processing unit 3 includes:

[0164] Pollutant gas condensation system 31 for condensing pollutant gas feedstock gas;

[0165] 32 is a contaminated gas dehydration system for further removing moisture from the raw gas;

[0166] 36; Adsorption-desorption system for adsorbing pollutant gases;

[0167] Filtration system 33 for filtering particulate matter in flue gas;

[0168] A polluted gas flow stabilization system 34 for controlling gas flow; and

[0169] 35; a contaminated gas pressurization system for controlling gas pressure;

[0170] The polluted gas condensation system 31, polluted gas dehydration system 32, filtration system 33, flow stabilization system, pressurization system and adsorption-desorption system 36 are connected in sequence;

[0171] The polluted gas dehydration system 32 is connected to the regeneration unit 2;

[0172] The adsorption-desorption system 36 is connected to the resource recovery unit 4.

[0173] The pollutant gas condensation system 31 includes

[0174] The first condenser 311 is used to condense the raw gas; and

[0175] First gas-liquid separator 312 for storing liquid generated from condensed raw material gas;

[0176] The first condenser 311 is connected to the first gas-liquid separator 312;

[0177] The first gas-liquid separator 312 is connected to the polluted gas dehydration system 32.

[0178] The first condenser 311 is a shell-and-tube type with a heat exchange area of ​​0.2 m2 and is made of 316L steel, and is connected by quick-connect fitting.

[0179] The first gas-liquid separator 312 has a volume of 2L and is made of 316L material.

[0180] The polluted gas dehydration system 32 includes at least two first dehydration towers 321 connected in parallel;

[0181] The inlet of the first dehydration tower 321 is connected to the polluted gas condensation system 31, and the outlet is connected to the filtration system 33.

[0182] The at least two parallel first dehydration towers 321 are used alternately.

[0183] The first dehydration tower 321 has dimensions of Φ60*370mm and is made of 316L stainless steel; it features quick-connect assembly.

[0184] The filtration system 33 includes a filter 331 for filtering residual particulate matter in the dehydrated gas;

[0185] The air inlet of the filter 331 is connected to the polluted gas dehydration system 32, and the air outlet is connected to the flow stabilization system.

[0186] The current stabilization system includes:

[0187] Mass flow controller 341 for controlling the flow rate of gas entering the adsorption-desorption system 36;

[0188] The inlet of the mass flow controller 341 is connected to the filtration system 33, and the outlet is connected to the pressurization system.

[0189] The mass flow controller 341 has a range of 0 to 10 min.

[0190] The pressurization system includes

[0191] A booster fan 351 is used to increase the pressure of polluted gas; the booster fan 351 has a range of 80m. 3 / h, adjustable, voltage 380V, power 300W

[0192] The air inlet of the booster fan 351 is connected to the flow stabilization system, and the air outlet is connected to the adsorption-desorption system 36.

[0193] The adsorption / desorption system 36 includes

[0194] At least three adsorption towers 361 connected in parallel for adsorbing pollutant gases; each adsorption tower 361 has dimensions of Φ60*370mm and is made of 316L stainless steel; flange connection.

[0195] 362 flue gas flow meter for measuring the flow rate of circulating desorption gas;

[0196] The adsorption tower heater 363 is used to heat the adsorption tower 361; the heating temperature of the adsorption tower heater 363 is adjustable from room temperature to 700℃, the length is 350mm, the heating method is thermal radiation heating, and the power is 1.4KW.

[0197] The second condenser 364 is used for condensing desorbed gases; the second condenser 364 is a shell and tube type, with a heat exchange area of ​​0.2m2, made of 316L material, and connected by quick-connect.

[0198] Vacuum diaphragm pump 365 is used for system circulation desorption gas; the specifications of vacuum diaphragm pump 365 are 6L / min, voltage 220V, and power 60W.

[0199] A second gas-liquid separator 366 is used to store the liquid (water) condensed from the desorbed gas by the second condenser 364; the second gas-liquid separator 366 has a volume of 2L and is made of 316L material;

[0200] Gas bag 367 for storing desorbed gas; gas bag 367 has a volume of 100L and is made of Teflon.

[0201] One end of the adsorption tower 361 is connected to the pressurization system and one end of the vacuum diaphragm pump 365, and the other end is connected to the adsorption tower heater 363.

[0202] The other end of the vacuum diaphragm pump 365 is connected to one end of the flue gas flow meter 362;

[0203] The other end of the flue gas flow meter 362 is connected to one end of the adsorption tower heater 363 and the second condenser 364, respectively.

[0204] The other end of the second condenser 364 is connected to one end of the second gas-liquid separator 366;

[0205] The other end of the second gas-liquid separator 366 is connected to one end of the gas bag 367;

[0206] The other end of the air bag 367 is connected to the resource recovery unit 4.

[0207] The adsorption tower 361 can be replaced with a catalytic tower or an absorption tower to adapt to the treatment of different pollutants (polluting gases).

[0208] The resource recovery unit 4 includes:

[0209] Desorption gas dehydration system 41 for desorption gas dehydration;

[0210] Desorption gas pressurization system 42 for increasing desorption gas pressure;

[0211] Desorbed gas condensation system 43 for condensing desorbed gas;

[0212] Desorption gas pressure stabilization system 44 for controlling the desorption gas pressure in resource recovery unit 4;

[0213] Desorption gas stabilization system 45 for controlling the desorption gas flow rate in resource recovery unit 4;

[0214] Refrigeration system 46 is used to provide cooling capacity to the desorbed gas condensation system;

[0215] Storage system 47 for storing products;

[0216] The desorbed gas dehydration system 41, the desorbed gas pressurization system 42, the desorbed gas condensation system 43, and the storage system 47 are connected in sequence;

[0217] The desorbed gas condensation system 43 is connected to the desorbed gas pressure stabilization system 44 and the desorbed gas flow stabilization system 45, respectively.

[0218] The refrigeration system 46 is connected to the desorbed gas condensation system 43.

[0219] The desorption gas dehydration system 41 includes at least one second dehydration tower 411, one end of which is connected to the adsorption-desorption system 36, and the other end is connected to the regeneration unit 2 and the desorption gas pressurization system 42 respectively.

[0220] The second dehydration tower 411 has dimensions of Φ60*370mm and is made of 316L stainless steel; it features quick-connect assembly.

[0221] The desorbed gas pressurization system 42 includes an oil-free air compressor 421, one end of which is connected to the desorbed gas dehydration system 41 and the other end of which is connected to the desorbed gas condensation system 43; the maximum pressure of the oil-free air compressor 421 is 0.8 MPa.

[0222] The oil-free air compressor 421 has a capacity of 60L / min, a voltage of 220V, and a power of 550W.

[0223] The desorbed gas condensation system 43 includes a primary cryocooler 431 and a secondary cryocooler 432, which are connected in series.

[0224] The desorbed gas in the gas bag 367 is dehydrated by the second dehydration tower 411 and then pressurized and collected by the oil-free air compressor 421. After being depressurized by the pressure reducing valve 441 of the desorbed gas pressure stabilization system 44, it enters the first-stage cryogenic reactor 431 for low-temperature pressurization and deep cooling. The cooled liquid enters the storage system 47 for storage, while the uncooled gas enters the second-stage cryogenic reactor 432 for pressurization and deep cooling. The liquid enters the product storage tank 471. The pressure of the first and second-stage cryogenic reactors is controlled by the back pressure valve 442 of the desorbed gas pressure stabilization system 44. The remaining gas after condensation is directly discharged.

[0225] Both the primary cryogenic cooler 431 and the secondary cryogenic cooler 432 are sleeve-type and made of 316L steel.

[0226] The desorption gas pressure stabilization system 44 includes:

[0227] A pressure reducing valve 441 for reducing the pressure of the desorbed gas entering the desorbed gas condensation system 43; and,

[0228] Back pressure valve 442 used to control the pressure of the desorbed gas condensation system 43;

[0229] The pressure reducing valve 441 is located at the inlet end of the desorbed gas condensation system 43;

[0230] The back pressure valve 442 is located at the outlet of the desorption gas condensation system 43.

[0231] The desorption gas stabilization system 45 includes

[0232] Gear flow meter 451 for measuring the flow rate of refrigerant (provided by the refrigeration system 46) circulating within the desorbed gas condensation system 43;

[0233] Metal tube rotor flowmeter 452 is used to measure the flow rate of condensed gas.

[0234] The gear flow meter 451 is installed at the inlet end of the desorption gas condensation system 43;

[0235] The metal tube rotor flowmeter 452 is installed at the outlet end of the desorption gas condensation system 43.

[0236] The refrigeration system 46 includes a low-temperature cold trap 461, the temperature range of which is -30°C to room temperature.

[0237] The storage system 47 includes a product storage tank 471; the product storage tank 471 has a volume of 1L and is made of 316L material.

[0238] The regeneration unit 2 includes:

[0239] Regenerator 21 for purging air path; and

[0240] Regeneration heater 22 for heating purge gas;

[0241] The inlet of the regenerator 22 is connected to the regenerator fan 21, and the outlet is connected to the polluted gas dehydration system 32 and the desorbed gas dehydration system 41, respectively.

[0242] The range of the regenerator 21 is 80m. 3 Adjustable within / h, voltage 380V, power 300W.

[0243] The regenerative heater 22 has an adjustable heating temperature from room temperature to 700℃, a length of 350mm, a heating method of thermal radiation heating, and a power of 1.4KW.

[0244] The PLC control unit 1 includes an embedded integrated touch screen and an automatic control module. The automatic control module operates the experimental process and includes the following functions:

[0245] ① It can display process flow diagrams with real-time status data, as well as real-time trend charts and historical trend charts (recorded once per minute). It records reaction temperature, reaction pressure, gas feed rate, etc., and can call up data from any time as needed.

[0246] ② It can record and generate required process data reports at set intervals (intervals can be set);

[0247] ③ It can automatically record all high-limit alarms that occur for key process variables and the alarm clearing time;

[0248] ④ Historical trends, data records, and alarm records for all time periods of the experimental process can be queried online or offline at any time. All of this data is not limited by time duration in principle (only by hard drive capacity).

[0249] ⑤ Establish alarm handling function;

[0250] ⑥ It can display and modify various experimental parameters in real time, such as temperature, flow rate and pressure;

[0251] ⑦ It can realize programmed temperature control of the regeneration heater 22 and the adsorption tower heater 363 (which includes a reactor, preheater and vaporizer) in the evaluation device, as well as flow control of liquid feed rate and gas feed rate.

[0252] Furthermore, the device is also equipped with 7 sampling ports, which can respectively collect samples in the following states: before dehydration, before denitrification, after denitrification, during purge gas, during desorption, after desorption, and after condensation.

[0253] The skid-mounted device design in this embodiment can meet the experimental requirements for the treatment and resource utilization of gaseous pollutants such as NOx. The main body material (referring to the first dehydration tower, second dehydration tower, polluted gas condenser, adsorption tower, pipelines, desorbed gas condensation system, product storage tank, etc.) is 316L stainless steel. It also employs a specially designed large heat capacity reactor (the reactor within the heater). The open-type heating furnace (the heating furnace within the heater) features a porous insulation plate design on its outer decorative skin, ensuring that the outer skin remains cool to the touch while meeting the high temperatures inside the furnace.

[0254] The device in this embodiment is equipped with two gas lines.

[0255] The first gas path uses raw material gas at 120-150°C as the reaction gas, which is supplied by other gas sources. After being condensed by the condenser, the gas enters the first dehydration tower 321 for dehydration, and then enters the gas mass flow controller 341 to set and display the flow rate. The gas mass flow controller 341 is configured with a range of 0-10 L / min. Finally, the gas enters the denitrification tower for denitrification.

[0256] The second gas path, used as purge gas, is supplied by the regeneration blower 21. After being preheated by the preheater to reach the experimental temperature, the gas enters the first dehydration tower 321 to regenerate the first dehydration tower 321 which is saturated with adsorption. Then the gas is released into the atmosphere.

[0257] The desorbed gas is cooled by a condenser and enters the gas bag 367. The gas inside the gas bag 367 is dehydrated by the second dehydration tower 411, then compressed and pressurized by an oil-free air compressor 421 before entering the backup pressure system. After cryogenic treatment, the liquid phase enters the gas-liquid separator, while the gas phase is discharged through the back pressure valve 442. The process includes seven sampling ports to collect samples in different states.

[0258] The first dehydration tower 321 and the second dehydration tower 411 in this embodiment:

[0259] It adopts a chuck connection, with an outer diameter of 60mm and a length of 370mm; it contains a molecular sieve internally, and the bottom is equipped with a PTFE gasket and a stainless steel support mesh to fix the molecular sieve; the design pressure is 0.6Mpa, and the material is 316L stainless steel. Temperature measuring resistors (PT100) are installed at some inlet and outlet points and in the tower; pressure sensors are located at the top and bottom of the first dehydration tower 321 to monitor pressure changes within the system.

[0260] Adsorption tower 361 in this embodiment:

[0261] The adsorption tower 361 uses a flange connection, with an outer diameter of 60mm and a length of 370mm. It can hold adsorbent internally, and the bottom is equipped with PTFE gaskets and a stainless steel support mesh to secure the adsorbent. The design pressure is 0.6MPa, and the material is 316L stainless steel. Temperature measuring resistors (PT100) are installed at some inlet and outlet points and within the tower itself. Pressure sensors are located at the top and bottom of the denitrification tower to monitor pressure changes within the system.

[0262] The first condenser 311 and the second condenser 364 in this embodiment:

[0263] The condenser uses a chuck connection, has an outer diameter of 89mm and a length of 320mm, a heat exchange area of ​​0.2m², is a tube-and-shell type, and uses PTFE gaskets. The design pressure is 0.6MPa, and the material is 316L stainless steel. Temperature measuring resistors (PT100) are located at the inlet, outlet, and within the tower. Pressure sensors are located at the top and bottom of the condenser to monitor pressure changes within the system.

[0264] The primary cryogenic cooler 431 and the secondary cryogenic cooler 432 in this embodiment:

[0265] The cryocooler is a shell-and-tube type with an outer diameter of 45mm and a length of 800mm; the tube is 10mm thick; the design pressure is 1.6MPa, and the material is 316L stainless steel. Temperature measuring resistors (PT100) are located at the inlet, outlet, and within the tower; pressure sensors are located at the top and bottom of the cryocooler to monitor pressure changes within the system.

[0266] In this embodiment, the regeneration heater 22 and the adsorption tower heater 363 are:

[0267] Electric heating is used. The reactor is an open-type single-stage furnace with a length of 350mm. The reaction temperature is controlled by controlling the temperature of the outer wall of the reactor. The heating power is adjustable and the instrument automatically controls the temperature.

[0268] The furnace shell is made of galvanized sheet with a powder coating; a hollow insulated space exists between the shell and the furnace material, with perforated holes at the chamfered edges for heat dissipation. The furnace wire is made of OCr27Al7Mo2, and the furnace lining is made of ceramic fiber. The furnace lining and furnace wire are integrally molded, allowing the wire to be completely embedded into the lining, resulting in faster heating while maintaining excellent thermal insulation. Combined with a porous partition plate design on the outer decorative skin, it meets the high temperatures inside the furnace while ensuring the outer skin remains cool to the touch. This integral molding technology allows the reactor to be designed as an open furnace, facilitating reactor assembly and disassembly.

[0269] The apparatus in this embodiment is used to treat nitrogen oxide gas, and the adsorption tower 361 is a denitrification tower;

[0270] The processing method of the device is as follows:

[0271] After being cooled by the first condenser 311, the raw gas enters the first gas-liquid separator 312. The gas is then directed to one of the first dehydration towers 321 by a control valve. The two first dehydration towers 321 work alternately. When one of the first dehydration towers 321 becomes saturated with adsorption, the regeneration fan 21 and the regeneration heater 22 are turned on for regeneration. The dehydrated raw gas is then sent to the denitrification tower by the booster fan 351. The three denitrification towers are used for adsorption, desorption and cooling of the raw gas, respectively. During desorption, the vacuum diaphragm pump 365 and the adsorption tower heater 363 are turned on. The desorbed gas is cooled by the second condenser 364 and then enters the second gas-liquid separator 366. Subsequently, the gas enters the gas bag 367. When the desorbed gas in the gas bag 367 reaches the condensation threshold, it is sent to the resource recovery unit 4.

[0272] Before the desorbed gas is utilized as a resource, the low-temperature cold trap 461 is brought to a set temperature. The low-temperature cold trap 461 transfers its cooling capacity to the first and second stage cryogenic reactors. After the temperature of the low-temperature cold trap 461 and the desorbed gas condensation system 43 stabilizes, the desorbed gas is sent to the second dehydration tower 411 for dehydration. After the second dehydration tower 411 becomes saturated with adsorption, it is regenerated by the regeneration fan 21 and the regeneration heater 22. The dehydrated gas is then passed through the oil-free air compressor 421 and enters the first and second stage cryogenic reactors for condensation to obtain liquid NO2 product. The remaining gas after condensation is discharged into the air.

[0273] In this embodiment, the first dehydration tower 321, the second dehydration tower 411, the denitrification tower, the first condenser 311, the second condenser 364, the first-stage cryogenic heater and the second-stage cryogenic heater 432 are all made of stainless steel 316L, but other materials with strong corrosion resistance can also be selected.

[0274] The skid-mounted device in this embodiment, when treating polluted gases, also includes the following:

[0275] (1) System leak detection

[0276] According to the test pressure requirements, the device should be leak-tested under operating pressure. Since only a few connections need to be changed for each test, when conducting continuous tests, the entire system can be tested for pressure and leakage at the beginning. Once the equipment passes the test, only the disassembled joints need to be tested each time it is used; other untouched parts do not need to be tested again.

[0277] First, check if the ferrule interface is tightened. Adjust the pressure of the pressure regulator to 0.1-0.3 MPa. Turn on the mass flow meter and set the value to the maximum flow rate of the mass flow meter. After the flow rate decreases, adjust the inlet valve and outlet valve to observe the system pressure slowly rise until it reaches the experimental pressure.

[0278] Once the pressure stabilizes, close the outlet and inlet valves and observe if the mass flow meter has a reading. At this point, the mass flow meter reading should be zero. If there is a reading, it indicates a system leak. Alternatively, disconnect the gas inlet and close the inlet valve, observing the reactor pressure drop over 30 minutes. Generally, it should not exceed 0.05 MPa. If a leak is detected, use soapy water to clean each connection point. Carefully observe which connection point has the largest soap bubble, indicating a leak. Usually, tightening the retaining nut at that connection point will resolve the issue.

[0279] Increase the pressure to the experimental pressure again and check for leaks again. Cut off the gas supply, close the outlet valve, and observe how much the reactor pressure drops after 30 minutes. If there is a leak, check each interface with soapy water and tighten the ferrule nuts at the leaking points again until the pressure drop of the reaction system is less than 0.1 MPa / 8h. At this point, the airtightness can be considered qualified.

[0280] (2) Temperature control instrument inspection

[0281] Change the set value of each instrument to between 100 and 150°C, turn on the heating switch, and observe whether the temperature control instrument is working properly. After waiting for 10 to 30 minutes, the displayed value of each instrument should be the same as the set value. If the two values ​​of a certain instrument are inconsistent, troubleshooting should be performed.

[0282] (3) Setting instrument parameters in PLC control unit 1

[0283] The commonly used instrument types for this device are 501E and 518E. The most frequently modified parameters of these instruments are as follows:

[0284] Sn: Indicates the type of sensor used in the instrument. This device uses a type K thermocouple for heating, with an operating temperature of -50 to 1300℃, and Sn = 0.

[0285] Ctrl: Auto-tuning, can be used during the first temperature rise, the system can complete the setting of PID parameters.

[0286] OPL: Output Lower Limit. Used to control the heating power; it will not be lower than this value.

[0287] OPH: Output upper limit. Used to control the heating power to achieve the maximum heating power of the system, generally below 100.

[0288] (4) Instrument alarm settings in PLC control unit 1

[0289] To improve system stability and accuracy, the device features alarms for abnormal system operation and automatic fault diagnosis. To ensure safe experimental operation, the device has audible and visual alarms for over-temperature and over-pressure. The over-temperature alarm can be set via a catalyst bed temperature instrument, with the upper limit alarm HIAL set to 100℃. An alarm will sound when the displayed temperature exceeds 100℃. The over-pressure alarm works similarly.

[0290] (5) Normal equipment shutdown

[0291] When the experiment is over, shut off the reactor inlet gas, replace the gas with inert gas, turn off the heating switch, and allow the reactor temperature to drop slowly. When the temperature drops below the catalyst activation temperature and the system pressure drops to atmospheric pressure, the gas flow meter can be turned off, and the gas feed valve and all power switches can be turned off.

[0292] (6) Abnormal equipment shutdown

[0293] In case of emergencies during the experiment, an emergency shutdown can be implemented. For example, in the event of a fire, electrical malfunction, or hazardous gas leak, the main power supply to the equipment can be directly shut off without affecting the reuse of the device. At the same time, the operating parameters of each instrument can be automatically recorded and their original settings preserved.

[0294] (7) Routine equipment maintenance

[0295] As this equipment is a precision laboratory instrument, it should be regularly maintained during routine use. Generally, every 3 to 6 months, the surfaces of the instruments and electronic components should be wiped with a clean, dry cloth. Do not use any materials containing organic solvents, as these may damage the electrical components.

[0296] The skid-mounted device in this embodiment has at least the following advantages:

[0297] (1) It adsorbs and purifies gaseous pollutants such as NOx in flue gas from different industries such as thermal power, iron and steel, glass, ceramics, cement and coking, and makes the gaseous pollutants into resources;

[0298] (2) The gaseous pollutants such as NOx in the flue gas are purified and recycled at the same time through a multi-tower process, and a continuous process is used to obtain gaseous pollutant recycled products.

[0299] (3) To study the effect of adsorbent materials on the adsorption and desorption of gaseous pollutants, it is possible to detect the adsorption and desorption of different gaseous pollutants by different adsorbent materials, and also to detect the adsorption and desorption of different gaseous pollutants by the same adsorbent material.

[0300] (4) The adsorption, purification, desorption and regeneration of flue gas pollutants are carried out in a denitrification tower, and the switching between multiple towers can be realized.

[0301] (5) When the volume of gaseous pollutants is large, the number of towers can be increased.

[0302] (6) The desorption tower can be replaced with a catalytic tower or an absorption tower depending on the type of pollutant. Different treatment methods can be used for different pollutants.

Claims

1. A mobile skid-mounted device for treating polluted gas, characterized in that, The skid-mounted device includes: A processing unit used to treat polluted gases; Resource recovery unit for condensing and recovering polluting gases; A regeneration unit for regeneration in the dehydration tower within the device; and, PLC control unit; The processing unit is connected to the resource recovery unit; The regeneration unit is connected to the processing unit, the resource recovery unit, and the PLC control unit, respectively. The PLC control unit is connected to the processing unit and the resource recovery unit respectively; The processing unit includes: A pollutant gas condensation system used for condensing pollutant gas feedstock gas; A polluted gas dehydration system used to further remove moisture from the raw gas; Adsorption-desorption system for adsorbing polluting gases; Filtration systems used to filter particulate matter from flue gas; A polluted gas flow stabilization system for controlling gas flow rate; and A system for pressurizing contaminated gases to control gas pressure; The polluted gas condensation system, polluted gas dehydration system, filtration system, flow stabilization system, pressurization system, and adsorption-desorption system are connected in sequence; The polluted gas dehydration system is connected to the regeneration unit; The adsorption-desorption system is connected to the resource recovery unit.

2. The mobile skid-mounted device for treating polluted gas according to claim 1, characterized in that, The pollutant gas condensation system includes The first condenser for condensing the raw gas; and A first gas-liquid separator used to store the liquid generated from the condensation of raw material gas; The first condenser is connected to the first gas-liquid separator; The first gas-liquid separator is connected to the polluted gas dehydration system.

3. The mobile skid-mounted device for treating polluted gas according to claim 2, characterized in that, The polluted gas dehydration system includes at least two first dehydration towers connected in parallel; The air inlet of the dehydration tower is connected to the polluted gas condensation system, and the air outlet is connected to the filtration system. The at least two parallel dehydration towers are used alternately.

4. A mobile skid-mounted device for treating polluted gas according to claim 3, characterized in that, The adsorption-desorption system includes: At least three adsorption towers connected in parallel for adsorbing pollutant gases; A flue gas flow meter used to measure the flow rate of circulating desorption gas; Adsorption tower heaters used to heat adsorption towers; A second condenser for condensing the desorbed gas; Vacuum diaphragm pumps used for system circulation desorption gas; A second gas-liquid separator used to store the liquid condensed from the desorbed gas by the second condenser; Gas bags used to store desorbed gas; One end of the adsorption tower is connected to the pressurization system and one end of the vacuum diaphragm pump, and the other end is connected to the adsorption tower heater. The other end of the vacuum diaphragm pump is connected to one end of the flue gas flow meter; The other end of the flue gas flow meter is connected to one end of the adsorption tower heater and the second condenser, respectively. The other end of the second condenser is connected to one end of the second gas-liquid separator; The other end of the second gas-liquid separator is connected to one end of the gas bag; The other end of the air bag is connected to the resource recovery unit.

5. A mobile skid-mounted device for treating polluted gas according to claim 4, characterized in that, The resource recovery unit includes: Desorption gas dehydration system for desorption gas dehydration; Desorption gas pressurization system used to increase the pressure of desorption gas; Desorbed gas condensation system for condensing desorbed gas; A desorption gas pressure stabilization system for controlling the desorption gas pressure in the resource recovery unit; Desorption gas flow stabilization system for controlling the desorption gas flow rate in the resource recovery unit; A refrigeration system used to provide cooling capacity to a desorbed gas condensation system; Storage systems used for storing products; The desorbed gas dehydration system, desorbed gas pressurization system, desorbed gas condensation system, and storage system are connected in sequence. The desorbed gas condensation system is connected to the desorbed gas pressure stabilization system and the desorbed gas flow stabilization system, respectively. The refrigeration system is connected to the desorbed gas condensation system.

6. A mobile skid-mounted device for treating polluted gas according to claim 5, characterized in that, The desorption gas pressure stabilization system includes: A pressure reducing valve for reducing the pressure of the desorbed gas entering the desorbed gas condensation system; and, A back pressure valve used to control the pressure of the desorbed gas condensation system; The pressure reducing valve is located at the inlet end of the desorbed gas condensation system; The back pressure valve is located at the outlet of the desorption gas condensation system.

7. A mobile skid-mounted device for treating polluted gas according to claim 6, characterized in that, The desorption gas flow stabilization system includes: Gear flow meter used to measure the flow rate of refrigerant circulating in a desorbed gas condensation system; Metal tube rotor flowmeter used to measure the flow rate of condensed gas; The gear flow meter is installed at the inlet end of the desorption gas condensation system; The metal tube rotor flowmeter is installed at the outlet end of the desorption gas condensation system.

8. A mobile skid-mounted device for treating polluted gas according to claim 7, characterized in that, The regeneration unit includes Regenerator blower for purging air passages; and A regenerator used to heat the purge gas; The inlet of the regenerator is connected to the regenerator fan, and the outlet is connected to the polluted gas dehydration system and the desorbed gas dehydration system, respectively. The filtration system includes a filter for filtering residual particulate matter in the dehydrated gas; the filter's inlet is connected to the polluted gas dehydration system, and its outlet is connected to the flow stabilization system. The flow stabilization system includes a mass flow controller for controlling the flow rate of gas entering the adsorption-desorption system; the inlet of the mass flow controller is connected to the filtration system, and the outlet is connected to the pressurization system. The desorbed gas condensation system includes a primary cryostat and a secondary cryostat, which are connected in series. The pressurization system includes a booster fan for increasing the pressure of pollutant gas; the inlet of the booster fan is connected to the flow stabilization system, and the outlet is connected to the adsorption-desorption system. The desorbed gas pressurization system includes an oil-free air compressor, one end of which is connected to the desorbed gas dehydration system and the other end of which is connected to the desorbed gas condensation system. The storage system includes product storage tanks.

9. A mobile polluted gas treatment method using a skid-mounted device as described in claim 8, characterized in that, The processing method includes the following steps: S1 Raw Material Gas Treatment: The raw material gas containing gaseous pollutants is condensed by the first condenser and then enters the first dehydration tower for dehydration through the first gas-liquid separator. After passing through the filter and mass flow controller, it enters the adsorption tower under the action of the booster fan. The remaining raw gas after adsorption is used as a gas source to desorb the adsorption tower that is saturated with adsorption, or to purge the adsorption tower that has completed desorption and cool it down. S2 adsorption saturation adsorption tower desorption: turn on the adsorption tower heater and vacuum diaphragm pump, and the gas forms a gas desorption cycle between the adsorption tower, adsorption tower heater and vacuum diaphragm pump; When the pressure in the gas circuit exceeds the set pressure, the pressure in the gas circuit will be automatically discharged, condensed by the second condenser, and then enter the gas bag through the second gas-liquid separator. S3 Resource Utilization: The desorbed gas in the gas bag is dehydrated by the second dehydration tower and then pressurized and collected by an oil-free air compressor. After being depressurized by a pressure reducing valve, it enters the first-stage cryogenic unit for low-temperature pressurization and deep cooling. The cooled liquid enters the product storage tank, while the uncooled gas enters the second-stage cryogenic unit for pressurization and deep cooling, and the liquid enters the product storage tank. The pressure of the first-stage and second-stage cryogenic reactors is controlled by a back pressure valve, and the condensed gas is directly discharged.

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