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

Abstract

The invention relates to the technical field of waste gas treatment, in particular to a treatment process for adsorption of low-concentration and high-boiling-point organic matter, a molecular sieve rotary drum structure and a preparation method thereof.The preparation method comprises the steps that Na-clinoptilolite is synthesized, Li-cp is obtained after the obtained Na-clinoptilolite is modified, then heating and heat preservation are conducted for 5 h, and then the temperature is reduced to the room temperature; heating and preserving heat for 8 hours in a nitrogen atmosphere, cooling to room temperature to obtain molecular sieve slurry, assembling high-strength glass fibers and stainless steel into a corrugated structure, dip-coating the corrugated structure in the molecular sieve slurry, and drying to obtain the high-strength corrugated molecular sieve. The adsorption performance and selectivity of the molecular sieve are improved through Li-cp ion exchange and a heat treatment process under a specific temperature condition, the corrugated structure assembled by high-strength glass fibers and stainless steel is adopted, the mechanical strength of the molecular sieve is remarkably improved through a multi-layer dip-coating hardening process, and the service life of the molecular sieve is remarkably prolonged through a multi-layer dip-coating hardening process. The formed high-strength corrugated molecular sieve has the characteristics of high strength and high adsorption efficiency.

Description

Technical Field

[0001] The invention relates to the technical field of waste gas treatment, and in particular to a treatment process for adsorbing low-concentration high-boiling-point organic matter, a molecular sieve drum structure and a preparation method thereof. Background Art

[0002] Aluminum foil is widely used in various industries such as flexible packaging, capacitors, cigarettes, pharmaceutical packaging, air conditioners, cable belts, etc. The rolling process of aluminum foil will be accompanied by a large amount of organic waste gas containing oil mist. The annual production of 80,000 tons of aluminum foil consumes about 1,000 tons of rolling oil per year. At present, in the industry, rolling oil waste gas is generally discharged after being treated in an oil washing tower. The oil washing tower has a good removal effect on oil mist, but has almost no control effect on VOCs, which makes it difficult to meet the increasingly stringent environmental protection requirements.

[0003] Rolling waste gas has the characteristics of large air volume, low concentration, high boiling point and obvious odor. Taking an aluminum foil enterprise with an annual output of 80,000 tons as an example, a rolling mill generates 50,000m3 of waste gas. 3 / h, the company has 12 rolling mills in total, with continuous production, and the amount of waste gas generated is 400,000 m 3 / h, the main exhaust gas pollutants are C12-C16 alcohols and esters, with boiling points of 180-320℃. After being treated in the oil scrubber, the exhaust gas concentration is about 80mg / m 3 The annual emission of VOCs is about 254t, which has adverse effects on the surrounding environment.

[0004] For large-volume, low-concentration, high-boiling-point organic waste gas, the commonly used technical process route is "concentration + combustion". Rolling waste gas needs to control the conventional desorption temperature at 260°C, and regular high-temperature desorption at 350°C is required to ensure the effective operation of the equipment. Due to the limitations of adsorption materials and equipment sealing, the maximum desorption temperature of high-temperature resistant molecular sieve rotor equipment on the market needs to be controlled within 180°C and must not be higher than 220°C for a long time. There is currently no suitable and feasible treatment process and equipment for 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 matter, a molecular sieve drum structure and a preparation method thereof has become a technical problem that needs to be urgently solved by those skilled in the art. Summary of the invention

[0006] The present invention aims at the above-mentioned technical problems, overcomes the shortcomings of the prior art, and provides a treatment process for the adsorption of low-concentration and high-boiling-point organic matter, a molecular sieve drum structure and a preparation method thereof. The adsorption performance and selectivity of the molecular sieve are improved through Li-CP ion exchange and a heat treatment process under specific temperature conditions. 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 formed 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 drum structure for adsorbing low-concentration high-boiling-point organic matter, which specifically comprises the following steps: First, Na-clinoptilolite is synthesized, the obtained Na-clinoptilolite is modified, and the Na-clinoptilolite is subjected to alkali metal Li-cp ion exchange, after the exchange is completed, the Na-clinoptilolite is filtered and washed with water until no chloride ions are contained, and then dried to obtain Li-cp; Secondly, the Li-cp was heated to 650° C., kept at this temperature for 5 hours, then cooled to room temperature, and then heated to 500° C. in a nitrogen atmosphere, kept at this temperature for 8 hours, and then cooled to room temperature to obtain a molecular sieve slurry; Finally, high-strength glass fiber and stainless steel are assembled into a corrugated structure, and dipped into the molecular sieve slurry, and dried to obtain a high-strength corrugated molecular sieve, which is used as a zeolite rotor component unit of the molecular sieve drum structure.

[0008] Furthermore, the step of synthesizing Na-clinoptilolite specifically comprises: Dissolve sodium hydroxide and sodium aluminate in deionized water in an equal molar ratio, heat and stir until a clear solution is obtained; Mixing the silica sol with the clear solution in a molar ratio of 0.95:1, and stirring 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; crystallizing the aluminosilicate sol at 140° C. for 72 hours to obtain a crystallization solution; The crystallized solution was filtered and washed to a pH value of 7.5-8, and dried at 80°C to obtain Na-clinoptilolite.

[0009] Furthermore, the alkali metal Li-cp ion exchange step specifically includes: The Na-clinoptilolite is placed in a LiCl solution and exchanged at 65° C. for 12 hours; After filtering, replace with fresh LiCl solution and repeat the exchange until it is complete; Wash with water until there is no chloride ion, and dry at 105℃.

[0010] Furthermore, the specific steps of dipping the corrugated structure into the molecular sieve slurry also include: The whole corrugated structure is dipped into the molecular sieve slurry, dried at 120℃, repeatedly dipped at least 3 times, and finally baked at 200℃-300℃ for 6 hours. Through multi-layer hardening technology, the corrugated molecular sieve has the characteristics of high strength and high adsorption efficiency. During the hardening process of high-strength glass fiber, it is very important to control the baking temperature during the baking process. Too high temperature will cause the glass fiber to deform and shorten its service life, while too low temperature will not achieve the curing effect. Therefore, the baking temperature is generally controlled between 200℃~300℃, and the baking time also needs to be properly controlled to ensure uniform temperature and curing effect.

[0011] In a second aspect, the present invention further provides a molecular sieve drum structure for adsorbing low-concentration high-boiling-point organic matter, comprising: A cylinder body, wherein the cylinder body is provided with an adsorption air inlet pipeline, an adsorption air outlet pipeline, a desorption air inlet pipeline and a desorption air outlet pipeline; A rotatable turntable, the turntable comprising a chassis, a rotating shaft, a driving assembly and a partition baffle; And a corrugated molecular sieve filled in the partition baffle, wherein the corrugated molecular sieve is a high-strength corrugated molecular sieve obtained in the preparation method described in any scheme of the first aspect.

[0012] In a third aspect, the present invention finally provides a treatment process for adsorbing low-concentration high-boiling-point organic matter, which uses the molecular sieve drum structure described in the second aspect to treat low-concentration high-boiling-point organic matter.

[0013] Furthermore, the processing technology also includes the following steps: Pre-treat exhaust gas through a multi-stage filtration system; The pre-treated waste gas enters the molecular sieve drum structure for adsorption and desorption; The desorption heat source is provided by using the thermal energy cascade utilization method.

[0014] Furthermore, the pretreated waste gas enters the molecular sieve 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 successively heated by the secondary energy-saving equipment and the primary energy-saving equipment and used as the desorption wind source gas; the high-concentration waste gas generated by desorption of the molecular sieve drum structure 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.

[0015] Furthermore, the specific steps of heat recovery are: (1) The high temperature gas of 800℃ in the combustion chamber of the RTO furnace is cooled to 230℃ through the first-level energy-saving equipment; (2) Mixing the 230°C gas with the RTO furnace outlet flue gas to 134°C; (3) The 134°C mixed gas is cooled to 84°C by the secondary energy-saving equipment before being discharged; (4) The 25°C adsorption purified exhaust gas is heated to 80°C and 210°C via the secondary energy-saving device and the primary energy-saving device respectively, and then used as a desorption heat source.

[0016] Furthermore, the multi-stage filtration system includes at least two or a combination of more than two of G4 primary filter cotton, F5 bag filter, F9 bag filter, and oil collecting tray.

[0017] The beneficial effects of the present invention are: (1) The present invention improves the adsorption performance and selectivity of the molecular sieve through Li-cp ion exchange and heat treatment process under specific temperature conditions, adopts a corrugated structure assembled from high-strength glass fiber and stainless steel, and significantly improves the mechanical strength and service life of the molecular sieve through a multi-layer dip-coating hardening process. The formed 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; (2) The present invention adopts a cascade utilization method of heat energy, through multi-stage heat recovery of RTO furnace waste gas and temperature utilization of purified tail gas, which significantly improves the energy utilization efficiency of the system. Through the combination of pretreatment of the multi-stage filtration system and treatment of the molecular sieve drum, 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 control of VOCs; (3) The present invention optimizes the molecular sieve drum structure, designs a high temperature resistant sealing structure, and adopts an all-round double-layer sealing form, a mechanical seal + a rubber seal. The rubber is borosilicate rubber, which can remain stable at a long-term working temperature of up to 380°C; (4) The present invention sets up an intelligent control system and presets multiple operation modes to achieve efficient and energy-saving operation of the system. Through intelligent control, it can process 200,000m 3 / h waste gas is expected to save 400m3 of natural gas 3 / h. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a schematic diagram of the treatment process for adsorption of low-concentration high-boiling-point organic matter of the present invention; Figure 2 It is a cross-sectional view of the molecular sieve drum structure in a specific embodiment of the present invention; Figure 3 This is a schematic diagram of the external structure of a molecular sieve drum structure in a specific embodiment of the present invention; Figure 4It is a PID diagram of one side of the molecular sieve drum structure in the treatment system in one specific embodiment of the present invention; Figure 5 It is a PID diagram of the RTO furnace side of the processing system in a specific embodiment of the present invention; In the figure: 100, cylinder; 110, chassis; 120, rotating shaft; 130, partition baffle; 140, molecular sieve module; 200, adsorption air inlet pipeline; 300, adsorption air outlet pipeline; 400, desorption air outlet pipeline; 500, desorption air inlet pipeline; 600, driving component; 10. Multi-stage filtration system; 20. Molecular sieve drum structure; 30. Primary energy-saving equipment; 40. Secondary energy-saving equipment. DETAILED DESCRIPTION

[0019] The method for preparing the molecular sieve drum structure for adsorbing low-concentration high-boiling-point organic matter of the present invention comprises the following steps: (1) Molecular sieve synthesis: First, mix and stir appropriate proportions of sodium hydroxide, sodium aluminate, and distilled water until a clear solution is obtained. Then slowly add a certain amount of silica sol to the above solution to obtain a snowflake-like gel, and stir at room temperature for 1 hour. During the stirring process, seeds (0.0139 g / g) can be added, and natural slaty molecular sieve is used as the seeds. Then transfer the above gel solution into a reactor and crystallize at 140°C for 72 hours. Take out the crystallized solution, filter and wash it until the pH is 7.5-8, and dry it at 80°C overnight. Add equal molar ratios of sodium hydroxide and sodium aluminate to deionized water, heat and stir for 15 minutes to obtain a clear solution. Then slowly pour the obtained clear solution 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 stir vigorously for 1 hour. Add 10% of seeds by mass, and stir at 30°C for 22 hours. The stirred aluminosilicate sol was poured into a 35 mL autoclave and hydrothermally crystallized at 140 ° C for 72 hours to obtain Na-clinoptilolite. In the experiment of adding seed crystals, the reaction temperature was widened and the reaction time was shortened after adding seed crystals. The pH in the present invention is 7.5-8 because if the alkalinity is reduced, the crystallization time will be prolonged, and if the alkalinity is too high, clinoptilolite cannot be synthesized and the seed crystals will be dissolved, so the pH is controlled in the range of 7.5-8.

[0020] (2) Molecular sieve modification: The alkali metal Li-cp ion exchange is performed on the oblique hairpin molecular sieve synthesized by the above method. LiCl solution is prepared, and oblique hairpin molecular sieve is added. The solution is heated to 65°C for exchange for 12 hours, filtered, and fresh solution is added. The above process is repeated. After the exchange is completed, it is filtered and washed with water until there is no Cl ion, and then placed in an oven at 105°C for drying to obtain Li-cp.

[0021] (3) Molecular sieve pretreatment: The material obtained in step (2) was heated to 650°C, kept at this temperature for 5 hours, cooled to room temperature and taken out, and then sent into a tubular furnace and heated to 500°C in a pure N2 atmosphere, kept at this temperature for 8 hours, cooled to room temperature and taken out.

[0022] (4) Synthesis of high-strength corrugated molecular sieve: Using high-strength glass fiber as a carrier, a group of stainless steel and high-strength glass fiber form a corrugated structure, which is dipped into the molecular sieve slurry as a whole, dried at 120°C, repeatedly dipped 3 times, and finally baked at 300°C for 6 hours. Finally, the high-strength corrugated molecular sieve is used as the zeolite rotor component unit of the molecular sieve drum structure.

[0023] like Figure 2 , Figure 3 As shown, as one of the optional embodiments of the present invention, the molecular sieve drum structure for adsorbing low-concentration high-boiling-point organic matter includes: A cylinder 100, on which an adsorption air inlet pipe 200, an adsorption air outlet pipe 300, a desorption air inlet pipe 500 and a desorption air outlet pipe 400 are arranged; A rotatable turntable, the turntable comprising a chassis 110, a rotating shaft 120, a driving assembly 600 and a partition baffle 130; And the corrugated molecular sieve filled in the partition baffle 130 , wherein the corrugated molecular sieve is the high-strength corrugated molecular sieve obtained in the preparation method of the molecular sieve drum structure in the aforementioned embodiment, constitutes the molecular sieve module 140 .

[0024] The adsorption air inlet pipe 200, the adsorption air outlet pipe 300, the desorption air inlet pipe 500 and the desorption air outlet pipe 400 are all fixed on the cylinder 100 and do not rotate with the turntable; the turntable includes a chassis 110, a rotating shaft 120, a driving assembly 600, and a partition baffle 130. The chassis 110 is rotatably connected to the rotating shaft 120, and the upper end of the rotating shaft 120 is connected to a cylindrical structure separated by a plurality of partition baffles 130. The molecular sieve module 140 is filled in the partition without any gap. 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, and the rubber adopts borosilicate rubber, which can remain stable at a long-term working temperature of up to 380°C.

[0025] See also Figure 1 , Figure 4 and Figure 5The treatment process for adsorption of low-concentration high-boiling-point organic matter provided by the present invention uses the aforementioned molecular sieve drum structure to treat low-concentration high-boiling-point organic matter, and together constitutes a treatment system for adsorption of low-concentration high-boiling-point organic matter, including a filter (multi-stage filtration system 10), a molecular sieve drum structure 20, a primary energy-saving device 30, a secondary energy-saving device 40, an RTO furnace, an exhaust pipe and a mixing air box. The specific treatment process is that the waste gas is first filtered to remove impurities such as particulate matter and oil mist that may be contained, and the filtered waste gas enters the adsorption end of the molecular sieve drum structure 20. After the molecular sieve is efficiently adsorbed, part of the clean gas is directly discharged from the exhaust pipe, and part is used as subsequent desorption gas. The high-concentration waste gas generated by the desorption of the molecular sieve drum 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. The tail gas after adsorption purification is used as the source of desorption air, which is a cold source. It absorbs heat through the secondary energy-saving equipment 40 and the primary energy-saving equipment 30 in sequence and then is used as desorption air for molecular sieve drum desorption. The high-temperature gas in the combustion chamber of the RTO furnace is used as a heat source. After passing through the primary energy-saving equipment 30, it is mixed with the flue gas at the outlet of the RTO furnace and then enters the secondary energy-saving equipment 40 to release heat, and then is directly discharged. The secondary energy-saving equipment 40 and the primary energy-saving equipment 30 described in the present invention are specifically heat exchangers.

[0026] The present invention Figure 4 and Figure 5 All of them are PID diagrams of the treatment system. Specifically, the exhaust gas is pre-treated by the multi-stage filtration system 10 to remove particulate matter and oil mist that may be mixed in the exhaust gas. The multi-stage filtration system is an external plug-in structure and can be replaced without stopping operation. After pre-treatment, the exhaust gas enters the adsorption end entrance of the molecular sieve drum 20 through the flame arrester and the adsorption fan. The molecular sieve drum 20 is used in one and the other in another. On the one hand, it can be switched to meet the requirements of continuous production of the enterprise, and on the other hand, it can cope with the special situation of overload operation of the enterprise. After adsorption by the molecular sieve drum, part of the exhaust gas is discharged into the exhaust pipe, and part is used as desorption exhaust gas. The exhaust gas from the desorption process enters the secondary energy-saving device 40, the primary energy-saving device 30, the pipeline heater (reserved), the molecular sieve drum desorption inlet, the molecular sieve drum desorption outlet, and the desorption fan to complete the desorption. The desorbed exhaust gas passes through the flame arrester and the RTO furnace fan to enter the RTO furnace for combustion treatment. Part of the clean gas after treatment is discharged into the exhaust pipe, and part of it is used as the heat source of the energy-saving device and enters the 1# mixing air box together with the high-temperature gas in the RTO furnace that has passed through the first-level energy-saving device 30 for heat exchange. The gas volume ratio is adjusted according to the system intelligence and is discharged into the exhaust pipe through the 1# mixing air box, the secondary energy-saving device 40, and the 2# mixing air box.

[0027] 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 drum structure 20 for adsorption and desorption; (3) using a thermal energy cascade utilization method to provide a desorption heat source. Among them, the pre-treated waste gas enters the molecular sieve drum structure 20 and the purified gas after adsorption 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 second-level energy-saving equipment 40 and the first-level energy-saving equipment 30 in turn as the desorption wind source gas; the high-concentration waste gas generated by the desorption of the molecular sieve drum 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.

[0028] Specifically, the multi-stage filtration system 10 described in the present invention includes G4 primary filter cotton, F5 bag filter, F9 bag filter, oil collection tray, etc., and the filtration system can adopt an external separate plug-in structure, which is convenient for online replacement; the RTO furnace incineration unit includes a heat storage chamber, a combustion chamber, etc., and the structure is not limited to a three-bed type or a rotary type; the treatment process has a two-stage energy-saving process, and through energy-saving design, the internal heat of the system is utilized in a step-by-step manner. The heat required for desorption of the molecular sieve drum structure 20 is all derived from the heat generated by the combustion of the RTO furnace, and there is no need to provide a desorption heat source through additional electric heating or the like.

[0029] The specific steps of heat recovery in this application are as follows: the tail gas after adsorption purification is used as the source of desorption wind, which is the cold source. The temperature of the tail gas after adsorption purification is 25°C. After absorbing heat through the secondary energy-saving device 40, the temperature is increased to 80°C, and then enters the primary energy-saving device 30 to continue to absorb heat, and the temperature is increased to 210°C, reaching the desorption temperature requirement, as desorption wind; the heat source of the primary energy-saving device 30 is the high-temperature gas in the combustion chamber of the RTO furnace, with a temperature of 800°C. After releasing heat through the primary energy-saving device 30, the temperature drops to 230°C, and the temperature is 134°C after mixing with the flue gas at the outlet of the RTO furnace, which is used as the heat source of the secondary energy-saving device 40, and enters the secondary energy-saving device 40 to continue to release heat. After the temperature drops to 84°C, it is directly discharged. The system uses PLC intelligent control to adjust the ratio of the heat source and cold source gas volume according to the required desorption air volume and temperature, and uses the heat exchange principle to realize heat recovery and utilization.

[0030] It can be understood that the treatment process for adsorbing low-concentration high-boiling-point organic matter described in the present invention has achieved effective VOCs control in the aluminum rolling industry. The VOCs concentration of the exhaust gas from the aluminum rolling industry changes periodically with the seasons and day and night, with high concentrations in summer and low concentrations in winter. In view of the above characteristics, a smart control system with three operating modes is set to achieve energy saving and low carbon: Mode 1 (fully automatic): Summer mode, continuous desorption of the drum, RTO running at full load; continuous desorption of the drum, drum speed of 1 rpm, conventional desorption temperature set at 220°C, regular high temperature regeneration temperature set at 300°C, frequency once a month; Mode 2 (fully automatic): Spring and autumn modes, the drum desorbs continuously, and the RTO operates at a load of 50% to 90%. The drum desorbs continuously, the drum speed is 0.6 rpm, the conventional desorption temperature is set at 200°C, and the regular high-temperature regeneration temperature is set at 300°C, with a frequency of once a month. Mode three (semi-automatic): Winter mode, manual operation of the desorption system, desorption time and desorption temperature can be set, desorption is intermittent desorption, the conventional desorption temperature is set to 180℃, the desorption time is 12h / d, the regular high-temperature regeneration temperature is set to 300℃, the frequency is once a month; RTO runs at full load, the running time is 12 h / d.

[0031] In addition to the above embodiments, the present invention may also have other implementation modes. Any technical solution formed by equivalent replacement or equivalent transformation falls within the protection scope required by the present invention.

Claims

1. A method for preparing a molecular sieve drum structure for adsorbing low-concentration high-boiling-point organic matter, characterized in that: The following steps are involved: Synthesizing Na-clinoptilolite, modifying the obtained Na-clinoptilolite, exchanging the Na-clinoptilolite with alkali metal Li-cp ions, filtering and washing with water after the exchange until no chloride ions are contained, and then drying to obtain Li-cp; The Li-cp was heated to 650° C., kept at this temperature for 5 hours, then cooled to room temperature, then heated to 500° C. in a nitrogen atmosphere, kept at this temperature for 8 hours, and then cooled to room temperature to obtain a molecular sieve slurry; High-strength glass fiber and stainless steel are assembled into a corrugated structure, and are dipped into the molecular sieve slurry. After drying, a high-strength corrugated molecular sieve is obtained, and the high-strength corrugated molecular sieve is used as a zeolite rotor component unit of the molecular sieve drum structure.

2. The preparation method according to claim 1, characterized in that: The step of synthesizing Na-clinoptilolite specifically comprises: Dissolve sodium hydroxide and sodium aluminate in deionized water in an equal molar ratio, heat and stir until a clear solution is obtained; Mixing the silica sol with the clear solution in a molar ratio of 0.95:1, and stirring 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; crystallizing the aluminosilicate sol at 140° C. for 72 hours to obtain a crystallization solution; The crystallized solution was filtered and washed to a pH value of 7.5-8, and dried at 80°C to obtain Na-clinoptilolite.

3. The preparation method according to claim 1, characterized in that: The alkali metal Li-cp ion exchange specifically includes: The Na-clinoptilolite is placed in a LiCl solution and exchanged at 65° C. for 12 hours; After filtering, replace with fresh LiCl solution and repeat the exchange until it is complete; Wash with water until there is no chloride ion, and dry at 105℃.

4. The preparation method according to claim 1, characterized in that: The corrugated structure is dipped into the molecular sieve slurry and specifically includes: The entire corrugated structure is dipped into the molecular sieve slurry, dried at 120°C, repeatedly dipped at least 3 times, and finally baked at 200°C-300°C for 6 hours.

5. A molecular sieve drum structure for adsorbing low-concentration high-boiling-point organic matter, characterized in that: Included are: A cylinder body, wherein the cylinder body is provided with an adsorption air inlet pipeline, an adsorption air outlet pipeline, a desorption air inlet pipeline and a desorption air outlet pipeline; A rotatable turntable, the turntable comprising a chassis, a rotating shaft, a driving assembly and a partition baffle; And the corrugated molecular sieve filled in the partition baffle, and the corrugated molecular sieve is a high-strength corrugated molecular sieve obtained in the preparation method described in any one of claims 1-4.

6. A treatment process for adsorption of low-concentration high-boiling-point organic matter, characterized in that: The molecular sieve drum structure described in claim 5 is used to treat low-concentration high-boiling-point organic matter.

7. The treatment process according to claim 6, characterized in that: The following steps are also included: Pre-treat exhaust gas through a multi-stage filtration system; The pre-treated waste gas enters the molecular sieve drum structure for adsorption and desorption; The desorption heat source is provided by using the thermal energy cascade utilization method.

8. The treatment process according to claim 7, characterized in that: The pretreated waste gas enters the molecular sieve drum structure and the purified gas after adsorption 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 turn as the desorption wind source gas; the high-concentration waste gas generated by desorption of the molecular sieve drum structure 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.

9. The treatment process according to claim 8, characterized in that: The specific steps of heat energy recovery are: (1) The high temperature gas of 800℃ in the combustion chamber of the RTO furnace is cooled to 230℃ through the first-level energy-saving equipment; (2) Mixing the 230°C gas with the RTO furnace outlet flue gas to 134°C; (3) The 134°C mixed gas is cooled to 84°C by the secondary energy-saving equipment before being discharged; (4) The 25°C adsorption purified exhaust gas is heated to 80°C and 210°C via the secondary energy-saving device and the primary energy-saving device respectively, and then used as a desorption heat source.

10. The treatment process according to claim 7, characterized in that: The multi-stage filtration system includes at least two or a combination of two or more of G4 primary filter cotton, F5 bag filter, F9 bag filter, and an oil collecting tray.

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