Treatment process for adsorption of low-concentration, high-boiling-point organic compounds, molecular sieve rotary drum structure and its preparation method

Abstract

This invention relates to the field of waste gas treatment technology, and in particular to a treatment process for adsorbing low-concentration, high-boiling-point organic matter, a molecular sieve rotary drum structure, and its preparation method. The preparation method includes synthesizing Na-clinoplastite, modifying the obtained Na-clinoplastite to obtain Li-cp, heating and holding at a certain temperature for 5 hours, then cooling to room temperature, followed by heating and holding at a certain temperature under a nitrogen atmosphere for 8 hours, and then cooling to room temperature to obtain a molecular sieve slurry. High-strength glass fiber and stainless steel are assembled into a corrugated structure, which is then dipped into the molecular sieve slurry. After drying, a high-strength corrugated molecular sieve is obtained. This invention improves the adsorption performance and selectivity of the molecular sieve through Li-cp ion exchange and heat treatment under specific temperature conditions. The corrugated structure assembled from high-strength glass fiber and stainless steel, and the multi-layer dip-coating hardening process significantly improve the mechanical strength and service life of the molecular sieve. The resulting high-strength corrugated molecular sieve exhibits high strength and high adsorption efficiency.

Description

Technical Field

[0001] This invention relates to the field of waste gas treatment technology, and in particular to a treatment process for the adsorption of low-concentration, high-boiling-point organic matter, a molecular sieve rotating cylinder structure, and its preparation method. Background Technology

[0002] Aluminum foil is widely used in various industries such as flexible packaging, capacitors, cigarettes, pharmaceutical packaging, air conditioners, and cable tapes. The aluminum foil rolling process generates a large amount of oil-mist-containing organic waste gas, with an annual production of 80,000 tons of aluminum foil resulting in a loss of approximately 1,000 tons of rolling oil per year. Currently, the industry generally treats the rolling oil waste gas using oil washing towers before discharge. While oil washing towers are effective at removing oil mist, they have almost no effect on VOCs, making it difficult to meet increasingly stringent environmental protection requirements.

[0003] Rolling mill exhaust gas is characterized by large volume, low concentration, high boiling point, and a distinct odor. Taking an aluminum foil enterprise with an annual production capacity of 80,000 tons as an example, a single rolling mill generates 50,000 m³ of exhaust gas. 3 The company has 12 rolling mills operating continuously, generating 400,000 m³ of waste gas per hour. 3 The main pollutants in the exhaust gas are C12-C16 alcohols and esters, with boiling points between 180-320℃. After treatment in the oil washing tower, the concentration of the exhaust gas is approximately 80 mg / m³. 3 The annual VOC emissions are approximately 254 tons, which has a negative impact on the surrounding environment.

[0004] For large-volume, low-concentration, high-boiling-point organic waste gas, the commonly used technical process is "concentration + combustion." Rolling waste gas requires controlling the conventional desorption temperature at 260℃, and periodic high-temperature desorption at 350℃ is necessary to ensure effective equipment operation. Currently, due to limitations in adsorption materials and equipment sealing, the maximum desorption temperature of high-temperature resistant molecular sieve rotor equipment on the market must be controlled below 180℃, and should not exceed 220℃ for extended periods. There are currently no suitable and feasible treatment processes or equipment for similar large-volume, low-concentration, high-boiling-point organic waste gas, such as rolling waste gas.

[0005] Therefore, how to design a treatment process for the adsorption of low-concentration, high-boiling-point organic compounds, the molecular sieve rotating cylinder structure, and its preparation method have become a technical problem that urgently needs to be solved by those skilled in the art. Summary of the Invention

[0006] This invention addresses the aforementioned technical problems and overcomes the shortcomings of existing technologies by providing a treatment process, a molecular sieve rotary structure, and its preparation method for the adsorption of low-concentration, high-boiling-point organic compounds. Through Li-cp ion exchange and heat treatment under specific temperature conditions, the adsorption performance and selectivity of the molecular sieve are improved. A corrugated structure assembled from high-strength glass fiber and stainless steel is adopted, and the mechanical strength and service life of the molecular sieve are significantly improved through a multi-layer dip-coating hardening process. The resulting high-strength corrugated molecular sieve has the characteristics of high strength and high adsorption efficiency.

[0007] In a first aspect, the present invention provides a method for preparing a molecular sieve rotating cylinder structure for the adsorption of low-concentration, high-boiling-point organic compounds, specifically comprising the following steps:

[0008] First, Na-clinoplastite was synthesized, and the obtained Na-clinoplastite was modified by alkali metal Li-cp ion exchange. After the exchange was completed, the Na-clinoplastite was filtered and washed with water until it was free of chloride ions, and then dried to obtain Li-cp.

[0009] Secondly, the Li-cp was heated to 650°C, held for 5 hours, and then cooled to room temperature. Then, under a nitrogen atmosphere, the temperature was raised to 500°C, held for 8 hours, and then cooled to room temperature to obtain molecular sieve slurry.

[0010] Finally, high-strength glass fiber and stainless steel are assembled into a corrugated structure and dipped into the molecular sieve slurry. After drying, a high-strength corrugated molecular sieve is obtained. This high-strength corrugated molecular sieve is used as a component unit of the zeolite rotor in the molecular sieve rotary structure.

[0011] Furthermore, the specific steps for synthesizing Na-clinoptilolite include:

[0012] Sodium hydroxide and sodium aluminate are dissolved in deionized water in an equimolar ratio, and the mixture is heated and stirred until clear to obtain a clear solution.

[0013] The silica sol and the clarified solution were mixed at a molar ratio of 0.95:1 and stirred to form a gel.

[0014] Add 10% by mass of natural clinoptilolite seed crystals and stir at 30°C for 22 hours to obtain aluminosilicate sol;

[0015] The silica-aluminate sol was crystallized at 140°C for 72 hours to obtain a crystallization solution;

[0016] The crystallization solution was filtered and washed until the pH value reached 7.5-8, and then dried at 80℃ to obtain Na-clinoptilolite.

[0017] Furthermore, the alkali metal Li-cp ion exchange step specifically includes:

[0018] The Na-clinoptilolite was placed in a LiCl solution and exchanged at 65°C for 12 hours.

[0019] After filtration, replace with fresh LiCl solution and repeat the exchange until complete exchange.

[0020] Wash with water until no chloride ions are present, and dry at 105°C.

[0021] Furthermore, the specific steps of impregnating the corrugated structure with the molecular sieve slurry also include:

[0022] The corrugated structure is integrally immersed in molecular sieve slurry, dried at 120℃, and the immersion process is repeated at least three times. Finally, it is baked at 200℃-300℃ for 6 hours. This multi-layer curing technology endows the corrugated molecular sieve with high strength and high adsorption efficiency. During the curing process of the high-strength glass fiber, controlling the baking temperature is crucial. Excessive temperature will cause glass fiber deformation and shorten its service life, while insufficient temperature will fail to achieve the desired curing effect. Therefore, the baking temperature is generally controlled between 200℃ and 300℃, and the baking time also needs to be appropriately controlled to ensure uniform temperature and effective curing.

[0023] Secondly, the present invention also provides a molecular sieve rotating cylinder structure for the adsorption of low-concentration, high-boiling-point organic compounds, comprising:

[0024] The cylinder is provided with an adsorption inlet pipe, an adsorption outlet pipe, a desorption inlet pipe, and a desorption outlet pipe.

[0025] A rotatable turntable, the turntable including a chassis, a rotating shaft, a drive assembly, and partition baffles;

[0026] And a corrugated molecular sieve filled within the partitioned baffle, wherein the corrugated molecular sieve is a high-strength corrugated molecular sieve obtained by the preparation method described in any of the embodiments of the first aspect.

[0027] Thirdly, the present invention also provides a treatment process for the adsorption of low-concentration high-boiling-point organic compounds, which uses the molecular sieve rotating cylinder structure described in the second aspect to treat low-concentration high-boiling-point organic compounds.

[0028] Furthermore, the processing technology also includes the following steps:

[0029] Exhaust gas is pretreated through a multi-stage filtration system;

[0030] The pretreated waste gas is then introduced into the molecular sieve rotating cylinder structure for adsorption and desorption.

[0031] The heat source for desorption is provided by using a cascade utilization method of thermal energy.

[0032] Furthermore, the pretreated waste gas enters the molecular sieve rotary drum structure for adsorption, and the purified gas is divided into two paths: the first path of purified gas is directly discharged, and the second path of purified gas is heated by the secondary energy-saving equipment and the primary energy-saving equipment in sequence and then used as the desorption source gas; the high-concentration waste gas generated by desorption by the molecular sieve rotary drum structure enters the RTO furnace for incineration, and the treated gas is divided into two paths, one of which is directly discharged, and the other is discharged after heat recovery.

[0033] Furthermore, the specific steps of the heat energy recovery are as follows:

[0034] (1) The high-temperature gas in the combustion chamber of the RTO furnace at 800℃ is cooled to 230℃ by a first-level energy-saving device;

[0035] (2) Mix the 230°C gas with the flue gas from the RTO furnace outlet to 134°C;

[0036] (3) The 134℃ mixed gas is cooled to 84℃ by a two-stage energy-saving device before being discharged;

[0037] (4) The 25℃ adsorption and purification tail gas is sequentially heated to 80℃ and 210℃ by a secondary energy-saving device and a primary energy-saving device, and then used as a desorption heat source.

[0038] Furthermore, the multi-stage filtration system includes at least two or more combinations of G4 primary filter cotton, F5 bag filter, F9 bag filter, and oil collection tray.

[0039] The beneficial effects of this invention are:

[0040] (1) This invention improves the adsorption performance and selectivity of molecular sieves through Li-cp ion exchange and heat treatment under specific temperature conditions. It adopts a corrugated structure assembled with high-strength glass fiber and stainless steel, and significantly improves the mechanical strength and service life of molecular sieves through multi-layer dip coating hardening process. The resulting high-strength corrugated molecular sieve has the characteristics of high strength and high adsorption efficiency. At the same time, natural clinoptilolite molecular sieve seeds are introduced into the synthesis process to optimize the crystallization effect of Na-clinoptilolite.

[0041] (2) The present invention adopts a thermal energy cascade utilization method. Through multi-stage thermal energy recovery of RTO furnace exhaust gas and heating utilization of purified tail gas, the energy utilization efficiency of the system is significantly improved. Through the combination of pretreatment of multi-stage filtration system and treatment of molecular sieve rotating cylinder, a complete low-concentration high-boiling-point organic matter treatment process is formed, which has the characteristics of high treatment efficiency and low energy consumption, and realizes the effective treatment of VOCs.

[0042] (3) The present invention optimizes the molecular sieve rotating cylinder structure, designs a high temperature resistant sealing structure, adopts an all-round double-layer sealing form, mechanical seal + rubber seal, the rubber is borosilicate rubber, which can remain stable at a long-term working temperature of up to 380℃.

[0043] (4) The present invention sets up an intelligent control system with multiple preset operating modes to achieve efficient and energy-saving operation of the system. Through intelligent control, it can process 200,000 m 3 / h waste gas is expected to save 400m³ of natural gas 3 / h. Attached Figure Description

[0044] Figure 1 This is a schematic diagram of the treatment process for the adsorption of low-concentration, high-boiling-point organic matter according to the present invention.

[0045] Figure 2 This is a cross-sectional view of the molecular sieve rotating cylinder structure in a specific embodiment of the present invention;

[0046] Figure 3 This is a schematic diagram of the external structure of the molecular sieve rotating cylinder structure in a specific embodiment of the present invention;

[0047] Figure 4 This is a PID diagram of one side of the molecular sieve rotating cylinder structure in a specific embodiment of the present invention.

[0048] Figure 5 This is a PID diagram of the RTO furnace side of the processing system in a specific embodiment of the present invention;

[0049] In the diagram: 100, cylinder; 110, chassis; 120, rotating shaft; 130, partition baffle; 140, molecular sieve module; 200, adsorption inlet pipe; 300, adsorption outlet pipe; 400, desorption outlet pipe; 500, desorption inlet pipe; 600, drive assembly;

[0050] 10. Multi-stage filtration system; 20. Molecular sieve rotary drum structure; 30. Primary energy-saving equipment; 40. Secondary energy-saving equipment. Detailed Implementation

[0051] The preparation method of the molecular sieve rotating cylinder structure for adsorption of low-concentration high-boiling-point organic compounds according to the present invention includes the following steps:

[0052] (1) Molecular sieve synthesis: First, mix appropriate proportions of sodium hydroxide, sodium aluminate, and distilled water and stir until a clear solution is obtained. Then, a certain amount of silica sol is slowly added to the above solution to obtain a snowflake-like gel. Stir at room temperature for 1 hour. During the stirring process, seed crystals (0.0139 g / g) can be added, with natural clinoptilolite molecular sieve as the seed crystal. Then, the above gel solution is transferred to a reaction vessel and crystallized at 140℃ for 72 hours. The crystallized solution is taken out, filtered, and washed until the pH is 7.5-8, and then dried overnight at 80℃. Sodium hydroxide and sodium aluminate in an equimolar ratio are added to deionized water, and the mixture is heated and stirred for 15 minutes to obtain a clear solution. Then, the obtained clear solution is slowly poured into a certain amount of silica sol (SiO2 content is 30%, and the molar ratio of silica sol to sodium hydroxide is 0.95), and stirred vigorously for 1 hour. Seed crystals with a mass fraction of 10% are added, and the mixture is stirred at a constant temperature of 30℃ for 22 hours. The stirred aluminosilicate sol was poured into a 35 mL high-pressure reactor and hydrothermally crystallized at 140 °C for 72 h to obtain Na-clinoptilolite. In the experiment with seed crystals, the addition of seed crystals broadened the reaction temperature range and shortened the reaction time. The pH in this invention is 7.5-8 because if the alkalinity decreases, the crystallization time will be prolonged, while excessively high alkalinity will prevent the synthesis of clinoptilolite and cause the seed crystals to dissolve. Therefore, the pH is controlled within the range of 7.5-8.

[0053] (2) Molecular sieve modification: The clinoptilolite molecular sieve synthesized by the above method was subjected to alkali metal Li-cp ion exchange. LiCl solution was prepared, clinoptilolite molecular sieve was added, the solution was heated to 65℃ for 12h for exchange, filtered, and fresh solution was added. The above process was repeated. After the exchange was completed, the solution was filtered and washed with water until no Cl ions were present. Then it was placed in an oven and dried at 105℃ to obtain Li-cp.

[0054] (3) Molecular sieve pretreatment: The material obtained in step (2) is heated to 650°C, kept at that temperature for 5 hours, cooled to room temperature and taken out, and then sent to a tube furnace to be heated to 500°C in a pure N2 atmosphere, kept at that temperature for 8 hours, cooled to room temperature and taken out.

[0055] (4) Synthesis of high-strength corrugated molecular sieve: High-strength glass fiber is used as a carrier. A group of stainless steel and high-strength glass fiber form a corrugated structure, which is then dipped into the molecular sieve slurry. After drying at 120℃, the dipping and coating are repeated 3 times. Finally, the sieve is baked at 300℃ for 6 hours. The high-strength corrugated molecular sieve is used as a component of the zeolite rotor in the molecular sieve rotor structure.

[0056] like Figure 2 , Figure 3 As shown, as one of the optional embodiments of the present invention, the molecular sieve rotating cylinder structure for adsorbing low-concentration high-boiling-point organic compounds includes:

[0057] The cylinder 100 is provided with an adsorption inlet pipe 200, an adsorption outlet pipe 300, a desorption inlet pipe 500, and a desorption outlet pipe 400.

[0058] A rotatable turntable, the turntable including a chassis 110, a rotating shaft 120, a drive assembly 600 and a partition baffle 130;

[0059] The corrugated molecular sieve filled in the partition baffle 130, wherein the corrugated molecular sieve is a high-strength corrugated molecular sieve obtained by the preparation method of the molecular sieve rotating cylinder structure described in the foregoing embodiment, constitutes the molecular sieve module 140.

[0060] The adsorption inlet pipe 200, adsorption outlet pipe 300, desorption inlet pipe 500, and desorption outlet pipe 400 are all fixed to the cylinder 100 and do not rotate with the turntable. The turntable includes a base 110, a rotating shaft 120, a drive assembly 600, and partition baffles 130. The rotating shaft 120 is rotatably connected to the base 110. The upper end of the rotating shaft 120 is connected to a cylindrical structure formed by multiple partition baffles 130. The molecular sieve module 140 is filled in the partition without gaps. The molecular sieve module 140 undergoes the adsorption-desorption-cooling stage by rotating the turntable. The sealing structure adopts an all-round double-layer sealing form, mechanical seal + rubber seal. The rubber is borosilicate rubber, which can remain stable at a long-term working temperature of up to 380℃.

[0061] See Figure 1 , Figure 4 and Figure 5The present invention provides a treatment process for the adsorption of low-concentration, high-boiling-point organic compounds. This process utilizes the aforementioned molecular sieve rotary drum structure to treat the low-concentration, high-boiling-point organic compounds, forming a treatment system for adsorption. The system includes a filter (multi-stage filtration system 10), a molecular sieve rotary drum structure 20, a primary energy-saving device 30, a secondary energy-saving device 40, an RTO furnace, an exhaust stack, and a mixing box. Specifically, the waste gas first passes through the filter to remove any particulate matter, oil mist, or other impurities. The filtered waste gas then enters the adsorption end of the molecular sieve rotary drum structure 20. After efficient adsorption by the molecular sieve, part of the clean gas is directly discharged from the exhaust stack, and the other part is used as subsequent desorption gas. The high-concentration waste gas generated by desorption from the molecular sieve rotary drum structure 20 is incinerated in the RTO furnace. The treated gas is then divided into two paths: one path is directly discharged, and the other path undergoes heat recovery before discharge. The exhaust gas after adsorption and purification is used as the source of desorption air and a cold source. After absorbing heat, it is used as desorption air for molecular sieve rotary desorption. The high-temperature gas in the RTO furnace combustion chamber is used as a heat source. After passing through the first-level energy-saving device 30, it is mixed with the flue gas at the RTO furnace outlet and enters the second-level energy-saving device 40 to release heat, and then is directly discharged. The second-level energy-saving device 40 and the first-level energy-saving device 30 mentioned in this invention are specifically heat exchangers.

[0062] The present invention Figure 4 and Figure 5 These are all PID diagrams of the treatment system. Specifically, the exhaust gas undergoes pretreatment through a multi-stage filtration system 10 to remove any particulate matter and oil mist that may be mixed in. The multi-stage filtration system has an external insertion structure, allowing for replacement without interrupting operation. After pretreatment, the exhaust gas passes through a flame arrester and an adsorption fan before entering the adsorption end inlet of the molecular sieve rotary drum 20. One molecular sieve rotary drum 20 is in operation while another is on standby, allowing for switching between operations to meet the requirements of continuous production and to handle special situations such as overload operation. After adsorption by the molecular sieve rotary drum, part of the exhaust gas is discharged into the exhaust stack, and the rest is used as desorption exhaust gas. The gas source sequentially enters the secondary energy-saving equipment 40, the primary energy-saving equipment 30, the pipeline heater (reserved), the molecular sieve rotary drum desorption inlet, the molecular sieve rotary drum desorption outlet, and the desorption fan to complete desorption. The desorbed waste gas passes through the flame arrester and the RTO furnace fan to enter the RTO furnace for combustion treatment. Part of the cleaned gas is discharged into the exhaust stack, and part of it is used as a heat source for the energy-saving equipment. It enters the No. 1 mixing box together with the high-temperature gas in the RTO furnace furnace that has undergone heat exchange in the primary energy-saving equipment 30. The gas volume ratio is intelligently adjusted according to the system. The gas is discharged into the exhaust stack through the No. 1 mixing box, the secondary energy-saving equipment 40, and the No. 2 mixing box.

[0063] Specifically, the treatment process includes the following main steps: (1) pre-treating the waste gas through a multi-stage filtration system 10; (2) allowing the pre-treated waste gas to enter the molecular sieve rotating cylinder structure 20 for adsorption and desorption; and (3) providing a heat source for desorption using a cascaded utilization of thermal energy. Among them, the purified gas after adsorption by the pre-treated waste gas entering the molecular sieve rotating cylinder structure 20 is divided into two paths: the first path of purified gas is directly discharged, and the second path of purified gas is heated by the secondary energy-saving device 40 and the primary energy-saving device 30 in sequence and then used as the desorption air source gas; the high-concentration waste gas generated by desorption by the molecular sieve rotating cylinder structure 20 enters the RTO furnace for incineration treatment, and the treated gas is divided into two paths, one of which is directly discharged, and the other is discharged after heat recovery.

[0064] Specifically, the multi-stage filtration system 10 of the present invention includes G4 primary filter cotton, F5 bag filter, F9 bag filter, oil collection tray, etc., and the filtration system can all adopt an externally individual pull-out structure for easy online replacement; the RTO furnace incineration unit includes a regenerator chamber, combustion chamber, etc., and the structure is not limited to three-bed type or rotary type; the treatment process has a two-stage energy-saving process, and through energy-saving design, the heat inside the system is utilized in a tiered manner. The heat required for desorption of the molecular sieve rotary drum structure 20 comes entirely from the heat generated by the combustion of the RTO furnace, without the need to provide a desorption heat source through additional electric heating or other means.

[0065] The specific steps of heat recovery in this application are as follows: The purified exhaust gas is used as the source of desorption air and a cold source. The temperature of the purified exhaust gas is 25℃. After absorbing heat in the secondary energy-saving device 40, the temperature rises to 80℃. It then enters the primary energy-saving device 30 to continue absorbing heat, raising the temperature to 210℃, meeting the desorption temperature requirement, and is then used as desorption air. The heat source for the primary energy-saving device 30 is the high-temperature gas from the RTO furnace combustion chamber, with a temperature of 800℃. After releasing heat in the primary energy-saving device 30, the temperature drops to 230℃. After mixing with the RTO furnace outlet flue gas, the temperature drops to 134℃, serving as the heat source for the secondary energy-saving device 40. The gas then enters the secondary energy-saving device 40 to continue releasing heat, and after the temperature drops to 84℃, it is directly discharged. The system is intelligently controlled by a PLC, adjusting the ratio of heat source and cold source gas volumes according to the required desorption air volume and temperature, utilizing the heat exchange principle to achieve heat recovery and utilization.

[0066] It is understood that the treatment process for adsorbing low-concentration, high-boiling-point organic compounds described in this invention achieves effective VOCs treatment in the aluminum rolling industry. The VOCs concentration in the exhaust gas from aluminum rolling mills exhibits periodic variations with seasons and diurnal cycles, characterized by high concentrations in summer and low concentrations in winter. To address these characteristics, a smart control system with three operating modes is implemented to achieve energy conservation and low carbon emissions.

[0067] Mode 1 (Fully Automatic): Summer mode, continuous desorption of the drum, RTO running at full load; continuous desorption of the drum, drum speed is 1 rpm, regular desorption temperature is set to 220℃, periodic high-temperature regeneration temperature is set to 300℃, frequency is once a month;

[0068] Mode 2 (Fully Automatic): Spring and Autumn modes, continuous desorption by the rotary drum, with the RTO operating at 50%~90% load; continuous desorption by the rotary drum, with a rotation speed of 0.6 rpm, a normal desorption temperature set at 200℃, and a periodic high-temperature regeneration temperature set at 300℃, with a frequency of once a month;

[0069] Mode 3 (Semi-automatic): Winter mode, manual operation of the desorption system, desorption time and desorption temperature can be set, desorption is intermittent, the normal desorption temperature is set to 180℃, the desorption time is 12h / d, the periodic high temperature regeneration temperature is set to 300℃, the frequency is once a month; RTO runs at full load, the running time is 12h / d.

[0070] In addition to the embodiments described above, the present invention may have other implementations. All technical solutions formed by equivalent substitution or equivalent transformation fall within the protection scope claimed by the present invention.

Claims

1. A method for preparing a molecular sieve rotating cylinder structure for adsorption of low-concentration, high-boiling-point organic compounds, characterized in that, Includes the following steps: Na-clinoplastite was synthesized, and the obtained Na-clinoplastite was modified by alkali metal Li-cp ion exchange. After the exchange was completed, the Na-clinoplastite was filtered and washed with water until it was free of chloride ions, and then dried to obtain Li-cp. The Li-cp was heated to 650°C, held at that temperature for 5 hours, and then cooled to room temperature. Then, under a nitrogen atmosphere, the temperature was raised to 500°C, held at that temperature for 8 hours, and then cooled to room temperature to obtain molecular sieve slurry. High-strength glass fiber and stainless steel are assembled into a corrugated structure and dipped into the molecular sieve slurry. After drying, a high-strength corrugated molecular sieve is obtained. This high-strength corrugated molecular sieve is used as a component unit of the zeolite rotor in the molecular sieve rotary drum structure. The alkali metal Li-cp ion exchange specifically includes: The Na-clinoptilolite was placed in a LiCl solution and exchanged at 65°C for 12 hours. After filtration, replace with fresh LiCl solution and repeat the exchange until complete exchange. Wash with water until no chloride ions are present, and dry at 105°C.

2. The preparation method according to claim 1, characterized in that, The specific steps for synthesizing Na-clinoptilolite include: Sodium hydroxide and sodium aluminate are dissolved in deionized water in an equimolar ratio, and the mixture is heated and stirred until clear to obtain a clear solution. The silica sol and the clarified solution were mixed at a molar ratio of 0.95:1 and stirred to form a gel. Add 10% by mass of natural clinoptilolite seed crystals and stir at 30°C for 22 hours to obtain aluminosilicate sol; The silica-aluminate sol was crystallized at 140°C for 72 hours to obtain a crystallization solution; The crystallization solution was filtered and washed until the pH value reached 7.5-8, and then dried at 80℃ to obtain Na-clinoptilolite.

3. The preparation method according to claim 1, characterized in that, The corrugated structure impregnation coating of the molecular sieve slurry specifically includes: The corrugated structure is immersed in molecular sieve slurry, dried at 120℃, and the immersion is repeated at least 3 times. Finally, it is baked at 200℃-300℃ for 6 hours.

4. A molecular sieve rotating cylinder structure for the adsorption of low-concentration, high-boiling-point organic compounds, characterized in that, Including: The cylinder is provided with an adsorption inlet pipe, an adsorption outlet pipe, a desorption inlet pipe, and a desorption outlet pipe. A rotatable turntable, the turntable including a chassis, a rotating shaft, a drive assembly, and partition baffles; And a corrugated molecular sieve filled in the partition baffle, wherein the corrugated molecular sieve is a high-strength corrugated molecular sieve obtained by any one of the preparation methods of claims 1-3.

5. A treatment process for the adsorption of low-concentration, high-boiling-point organic matter, characterized in that, The molecular sieve rotating cylinder structure described in claim 4 is used to treat low-concentration, high-boiling-point organic compounds.

6. The processing technology according to claim 5, characterized in that, It also includes the following steps: Exhaust gas is pretreated through a multi-stage filtration system; The pretreated waste gas is then introduced into the molecular sieve rotating cylinder structure for adsorption and desorption. The heat source for desorption is provided by using a cascade utilization method of thermal energy.

7. The processing technology according to claim 6, characterized in that, The pretreated waste gas enters the molecular sieve rotating cylinder structure for adsorption, and the purified gas is divided into two paths: the first path of purified gas is directly discharged, and the second path of purified gas is heated by the secondary energy-saving equipment and the primary energy-saving equipment in sequence and then used as the desorption source gas; the high-concentration waste gas generated by desorption by the molecular sieve rotating cylinder structure enters the RTO furnace for incineration. The treated gas is divided into two paths, one of which is directly discharged, and the other is discharged after heat recovery.

8. The processing technology according to claim 7, characterized in that, The specific steps for heat energy recovery are as follows: (1) The high-temperature gas in the combustion chamber of the RTO furnace at 800℃ is cooled to 230℃ by a first-level energy-saving device; (2) Mix the 230°C gas with the flue gas from the RTO furnace outlet to 134°C; (3) The 134℃ mixed gas is cooled to 84℃ by a two-stage energy-saving device before being discharged; (4) The 25℃ adsorption and purification tail gas is sequentially heated to 80℃ and 210℃ by a secondary energy-saving device and a primary energy-saving device, and then used as a desorption heat source.

9. The processing technology according to claim 6, characterized in that, The multi-stage filtration system includes at least two of the following: G4 primary filter cotton, F5 bag filter, F9 bag filter, and oil collection tray.

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