Ultrahigh molecular weight polyethylene fiber fugitive emission tail gas recovery technology

Abstract

The invention discloses an ultra-high molecular weight polyethylene fiber fugitive emission tail gas recovery technology which comprises a tail gas collection system, a tail gas treatment system and a control system. The tail gas collecting system comprises a dome type gas collecting hood and a fully-closed gas collecting hood which are arranged at key emission points of the ultra-high molecular weight polyethylene fiber production line, the dome type gas collecting hood is used for collecting tail gas of the emission points which cannot be completely closed, and the fully-closed gas collecting hood is used for collecting tail gas of the emission points which can be completely closed. And the collecting pipeline is used for communicating the dome-type gas collecting hood and the totally-enclosed gas collecting hood with the tail gas collecting system. Tail gas generated in the ultra-high molecular weight polyethylene fiber production and preparation process can be collected in a non-sealed environment through the dome type gas collecting hood, tail gas in the tail gas concentrated discharge pipe is conveyed and collected in cooperation with the sealed gas collecting hood, unorganized discharge of the tail gas is effectively avoided, the tail gas collecting and treating efficiency is improved, air pollution is avoided, and the environment is protected. And the tail gas is subjected to multi-layer purification so as to be recycled.

Description

Technical Field

[0001] The invention relates to the technical field of tail gas recovery, in particular to a technology for recovering tail gas emitted by unorganized ultra-high molecular weight polyethylene fibers. Background Art

[0002] Ultra-high molecular weight polyethylene fiber is a high-performance fiber with excellent physical and mechanical properties. It is widely used in bulletproof vests, ropes, fishing nets and other fields. However, in the production process of ultra-high molecular weight polyethylene fiber, a large amount of tail gas will be generated, mainly including ethylene, hydrogen, methane and other gases. These tail gases not only waste resources, but also may have a negative impact on the environment. For example, ethylene is a flammable and toxic gas that can easily cause explosions and poisoning; hydrogen is an extremely flammable gas that can also easily cause accidents. Therefore, the development of an effective tail gas recovery technology is of great significance for reducing environmental pollution and improving resource utilization.

[0003] In a tail gas recovery and absorption system for ultra-high molecular weight polyethylene polymerization production with announcement number CN206214982U, the system includes an adsorption tower, a steam pipeline, an oil outlet pipeline, an air intake pipeline, an exhaust pipeline, a feeding pipeline, a nitrogen pipeline, an induced draft fan, an adsorption tower tail gas concentration detector and an oil outlet pipeline concentration detector. The adsorption tower is equipped with a steam pipeline, a nitrogen pipeline, an exhaust pipeline and a feeding pipeline above, and an air intake pipeline and an oil outlet pipeline below. The induced draft fan is installed at the input end of the air intake pipeline, the adsorption tower tail gas concentration detector is installed at the output end of the exhaust pipeline, and the oil outlet pipeline concentration detector is installed at the output end of the oil outlet pipeline. Compared with the prior art, this utility model can achieve the purpose of meeting the emission standards of production tail gas and saving production costs;

[0004] When the above-mentioned prior art is in use, two adsorption towers are mainly used to treat the exhaust gas prepared by the production of polyethylene fiber. The adsorption capacity of the adsorption tower is limited. When the exhaust gas flow exceeds its processing capacity, it may lead to incomplete exhaust gas treatment and some harmful substances remain. The single adsorbent adsorption treatment will be saturated after adsorbing a certain amount of harmful substances and requires regeneration. The regeneration process usually includes heating, cooling and other steps, which is time-consuming and energy-intensive. In addition, when collecting the exhaust gas, only the intake pipe is used to inject the exhaust gas. The method is single and it is impossible to collect the exhaust gas from the unsealed emission point, resulting in low exhaust gas treatment and recovery efficiency. Therefore, corresponding improvements are needed. Summary of the invention

[0005] The purpose of the present invention is to provide a technology for recovering the tail gas emitted from unorganized ultra-high molecular weight polyethylene fibers, so as to solve the problem of poor tail gas treatment and recovery effect and efficiency in the production process of ultra-high molecular weight polyethylene fibers mentioned in the above background technology.

[0006] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: Ultra-high molecular weight polyethylene fiber unorganized emission tail gas recovery technology, including: tail gas collection system, tail gas treatment system, control system;

[0007] The tail gas collection system includes a dome-type gas collection hood and a fully enclosed gas collection hood installed at key emission points of the ultra-high molecular weight polyethylene fiber production line. The dome-type gas collection hood is used to collect tail gas from emission points that cannot be completely enclosed, and the fully enclosed gas collection hood is used to collect tail gas from emission points that can be completely enclosed. The collection pipeline is used to connect the dome-type gas collection hood and the fully enclosed gas collection hood with the tail gas collection system. The collection pipeline is provided with an induced draft fan to ensure that the tail gas can smoothly and efficiently enter the tail gas collection system. The collection pipeline is provided with a gas concentration sensor;

[0008] The tail gas treatment system includes a pretreatment unit, a membrane separation unit, an adsorption unit and a tail gas purification unit. The pretreatment unit and the membrane separation unit are used together. The pretreatment unit and the adsorption unit are connected by a connecting pipe, and a tail gas concentration detector is added at the end of the connecting pipe. The adsorption unit and the tail gas purification unit are connected by an exhaust pipe.

[0009] A connecting pipe is connected between the exhaust gas collection system and the exhaust gas treatment system, and a gas valve is provided on the connecting pipe;

[0010] The control system adopts an automated control system to monitor and adjust each link of the exhaust gas collection and treatment system in real time. The control system includes sensors and actuators to realize automatic collection, treatment and discharge of exhaust gas. The control system has fault alarm and emergency processing functions.

[0011] Preferably, a filter cylinder is three-dimensionally arranged above the interior of the pretreatment unit. The filter cylinder is three-dimensionally distributed in a columnar shape and is made of glass fiber. The filter cylinder is a microporous filter with a pore size of 0.1 to 10 microns (μm).

[0012] Preferably, an air flow hole is provided on the side of the filter screen cylinder, and the air flow hole and the connecting pipe 4 are interconnected.

[0013] Preferably, the VOC hydrocarbon membrane is arranged in a tilted state in the pretreatment unit, the VOC hydrocarbon membrane is provided with two layers, the two layers of VOC hydrocarbon membrane are tilted in opposite directions, and the diameter of the VOC hydrocarbon membrane matches the diameter of the filter cylinder.

[0014] Preferably, the pressure swing adsorption unit comprises:

[0015] The adsorption tower is loaded with an adsorbent, which includes zeolite and activated carbon, has a high specific surface area and porosity, and can effectively adsorb hydrocarbon components in the tail gas;

[0016] A pressure control component, used to adjust the pressure in the adsorption tower. The pressure control component includes a compressor and a vacuum pump, which are used to provide and adjust the required pressure;

[0017] The temperature control component is used to adjust the temperature in the adsorption tower. The temperature control component includes a temperature sensor, a heater, and a cooler. The temperature sensor is arranged at the inlet and outlet of the adsorption tower and above the adsorption layer. The detected temperature is transmitted to the controller, and the controller controls the opening and closing of the heater and the cooler.

[0018] Preferably, the exhaust gas purification unit comprises a catalytic reactor, the catalytic reactor is filled with a catalyst, a heating plate and a temperature sensor are provided in the catalytic reactor, a gas exhaust pipe is installed on the catalytic reactor, and a gas valve is installed on the gas exhaust pipe.

[0019] Preferably, the sensors in the control system include: a temperature sensor for temperature control of tail gas treatment; a pressure sensor for monitoring pressure changes in the tail gas pipeline; a gas concentration sensor, fixedly connected to the gas exhaust pipe through a flange, for detecting the concentration of harmful gases in the tail gas to ensure that the emission meets environmental protection standards;

[0020] Actuators, including gas valves, are installed on the exhaust gas transmission pipeline;

[0021] Sirens, including audible and visual sirens.

[0022] Another technical solution provided by the present invention is to provide a technology for recovering tail gas from unorganized emission of ultra-high molecular weight polyethylene fibers, comprising the following steps:

[0023] S1: Install the dome-type gas collection hood above the ultra-high molecular weight polyethylene fiber production line, and fix the exhaust emission pipe on the production line to the sealed gas collection hood accordingly, so that the sealed and unsealed exhaust gases generated during the production and preparation of ultra-high molecular weight polyethylene fibers are introduced into the exhaust gas collection system through the collection pipe. Gas concentration sensors are installed on the collection pipes to monitor the chemical composition and concentration of the exhaust gas in real time, which is crucial for understanding the exhaust gas composition, evaluating the environmental performance of the production process, and ensuring the exhaust gas treatment effect;

[0024] S2: The exhaust gas collected centrally is injected into the exhaust gas treatment system through the connecting pipe, and passes through the pretreatment unit. The exhaust gas is filtered and impurities are removed by the filter cylinder inside the pretreatment unit. The filter pore size is 0.1 to 10 microns (μm), and the suspended particles (fiber fragments, dust), microorganisms (bacteria, pathogens), and some VOCs in the exhaust gas are effectively filtered out;

[0025] S3: The exhaust gas is discharged through the membrane separation unit and further filtered by the VOC hydrocarbon membrane to deeply purify the exhaust gas, further remove the tiny particles and volatile organic compounds (VOCs) in the exhaust gas, and reduce the emission of harmful substances;

[0026] S4: The purified tail gas is further discharged into the adsorption unit through the connecting pipe. The adsorbent in the adsorption tower (including zeolite and activated carbon) removes the odor and adsorbs certain inorganic gases in the tail gas, such as ammonia and hydrogen sulfide, to ensure the cleanliness of the tail gas.

[0027] S5: The exhaust gas finally enters the catalytic reactor in the exhaust gas purification unit, which is filled with catalytic reactants to remove harmful substances in the exhaust gas that are difficult to remove by physical methods (such as filtration and adsorption), such as nitrogen oxides (NOx), carbon monoxide (CO) and incompletely burned hydrocarbons (HC), so as to achieve efficient purification of the exhaust gas. The purified exhaust gas can be discharged through the exhaust pipe for recovery.

[0028] Compared with the prior art, the beneficial effects of the present invention are: through reasonable gas collection hood design and layout, the unorganized emission of tail gas is effectively controlled, the collection efficiency of tail gas is improved, and the membrane separation unit is combined with the adsorption unit to achieve efficient recovery of valuable gases such as ethylene and hydrogen in the tail gas, thereby improving resource utilization;

[0029] The tail gas generated during the production and preparation of ultra-high molecular weight polyethylene fibers can be collected in a non-sealed environment by using a dome-type gas collection hood, and the tail gas in the tail gas centralized emission pipe can be transported and collected in conjunction with the sealed gas collection hood, effectively avoiding the unorganized emission of tail gas, improving the tail gas collection and treatment efficiency, avoiding air pollution, and performing multi-layer purification on the tail gas for recycling and reuse;

[0030] The collected tail gas first enters the pretreatment unit, and uses the three-dimensionally distributed filter cylinder inside it to remove dust, oil and moisture. The filter cylinder has a filtration aperture of 0.1 to 10 microns (μm), which can accurately intercept tiny particles and impurities in the tail gas, thereby effectively improving the purity of tail gas recovery. Then it enters the membrane separation unit 22 to separate and recover valuable gases such as ethylene and hydrogen, and then enters the adsorption unit to further improve the recovery rate and remove residual impurities. Finally, it enters the tail gas purification unit for catalytic oxidation or chemical absorption treatment to ensure that the discharged gas meets environmental protection standards;

[0031] The membrane separation unit is used in conjunction with the pressure swing adsorption unit to achieve efficient recovery of valuable gases such as ethylene and hydrogen in the exhaust gas, thereby improving resource utilization. Two layers of VOC hydrocarbon membranes are arranged in opposite directions in the membrane separation unit, which helps to optimize the gas flow path, reduce the residence time of the gas on the membrane surface, and reduce the risk of membrane contamination. The double-layer setting ensures that the VOCs in the exhaust gas are fully separated and recovered. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0033] Figure 1 This is a diagram showing the recovery technology of tail gas from unorganized emission of ultra-high molecular weight polyethylene fibers of the present invention;

[0034] Figure 2 It is a structural flow chart of the present invention;

[0035] Figure 3 It is a schematic diagram of the structure of the membrane separation unit of the present invention;

[0036] Figure 4 It is a schematic diagram of the structure of the filter screen cylinder in the pretreatment unit of the present invention.

[0037] Explanation of the reference numerals in the figure: 1. exhaust gas collection system; 11. dome-type gas collecting hood; 12. sealed gas collecting hood; 13. collection pipe; 14. induced draft fan; 2. exhaust gas treatment system; 21. pretreatment unit; 22. membrane separation unit; 23. adsorption unit; 24. exhaust gas purification unit; 3. control system; 4. connecting pipe. DETAILED DESCRIPTION

[0038] In order to make the purpose, technical solution and advantages of the embodiments of the present invention clearer, the technical solution in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0039] See also Figure 1-Figure 4 , the present invention provides the following technical solutions:

[0040] Embodiment 1:

[0041] like Figure 1 , Figure 2 , Figure 3 , Figure 4 As shown, a technology for recovering tail gas from unorganized emission of ultra-high molecular weight polyethylene fibers includes: a tail gas collection system 1, a tail gas treatment system 2, and a control system 3;

[0042] The tail gas collection system 1 includes a dome-type gas collection hood 11 and a fully enclosed gas collection hood 12 which are arranged at key emission points of the ultra-high molecular weight polyethylene fiber production line. The dome-type gas collection hood 11 is used to collect tail gas from emission points that cannot be completely enclosed, and the fully enclosed gas collection hood 12 is used to collect tail gas from emission points that can be completely enclosed. The collection pipe 13 is used to connect the dome-type gas collection hood 11 and the fully enclosed gas collection hood 12 with the tail gas collection system 1.

[0043] like Figure 1 , Figure 2 As shown, the dome-type gas collecting hood 11 and the fully enclosed gas collecting hood 12 are used in combination, wherein the dome-type gas collecting hood 11 is set up on the ultra-high molecular weight polyethylene fiber production line to collect the tail gas at the gap or other non-sealed places, and the fully enclosed gas collecting hood 12 is used to transport and collect the tail gas in the tail gas centralized emission pipe, so as to realize the centralized collection of tail gas and avoid unorganized emission to pollute the environment, and then the exhaust gas enters the next step of the treatment system, that is, the tail gas treatment system 2 for tail gas treatment;

[0044] The collecting pipes 13 are provided with induced draft fans 14 to ensure that the exhaust gas can smoothly and efficiently enter the exhaust gas collection system 1. The collecting pipes 13 are provided with gas concentration sensors;

[0045] like Figure 1 As shown, during the exhaust process, the driving of the induced draft fan 14 is used to enhance the exhaust pressure, so that the exhaust gas can be discharged from the ultra-high molecular weight polyethylene fiber production line into the exhaust treatment system 2 more quickly and smoothly. During this process, the gas concentration sensor is set to monitor the gas concentration in real time;

[0046] The tail gas treatment system 2 includes a pretreatment unit 21, a membrane separation unit 22, an adsorption unit 23 and a tail gas purification unit 24. The pretreatment unit 21 and the membrane separation unit 22 are used together. The pretreatment unit 21 and the adsorption unit 23 are connected by a connecting pipe, and a tail gas concentration detector is added at the end of the connecting pipe. The adsorption unit 23 and the tail gas purification unit 24 are connected by an exhaust pipe.

[0047] A filter cylinder is arranged in a three-dimensional shape on the upper part of the pretreatment unit 21. The filter cylinder is arranged in a columnar three-dimensional distribution. The material is glass fiber. The filter cylinder is a microporous filter with a pore size of 0.1 to 10 microns (μm). The side of the filter cylinder is provided with air flow holes, and the air flow holes are interconnected with the connecting pipe 4.

[0048] The membrane separation unit 22 includes a membrane assembly, which is the core component of the membrane separation unit 22. The membrane assembly is composed of a plurality of membrane elements, wherein the membrane element is a VOC hydrocarbon membrane, and the pore size of the VOC hydrocarbon membrane is 0.001 to 0.1 micrometers (μm);

[0049] The VOC hydrocarbon membrane is arranged in a tilted state in the pretreatment unit 21. Two layers of the VOC hydrocarbon membrane are provided. The tilt directions of the two layers of the VOC hydrocarbon membrane are opposite. The diameter of the VOC hydrocarbon membrane matches the diameter of the filter cylinder.

[0050] like Figure 1 , Figure 2 , Figure 3 and Figure 4 As shown, the filter cylinder and the double-layer membrane original can be used together to filter and remove impurities from the injected exhaust gas. The filter cylinder is made of glass fiber, which is a microporous filter with a pore size of 0.1 to 10 microns (μm). It has high strength, high toughness and corrosion resistance. It has a high pressure and temperature in exhaust gas treatment. The microporous pore size accurately intercepts tiny particles and impurities in the exhaust gas, removes fiber fragments, dust and some VOCs in the exhaust gas, and the double-layer VOC hydrocarbon membrane has a filtration pore size of 0.001 to 0.1 microns (μm), which can filter volatile organic compounds (VOCs) more finely and reduce the emission of harmful gases.

[0051] Embodiment 2:

[0052] This embodiment is different from the first embodiment, and provides an adsorption treatment technology for unorganized exhaust gas emitted by ultra-high molecular weight polyethylene fibers, including a pressure swing adsorption unit 23 and an exhaust gas purification unit 24. The pressure swing adsorption unit 23 includes:

[0053] The adsorption tower is loaded with an adsorbent, which includes zeolite and activated carbon, has a high specific surface area and porosity, and can effectively adsorb hydrocarbon components in the tail gas;

[0054] A pressure control component, used to adjust the pressure in the adsorption tower. The pressure control component includes a compressor and a vacuum pump, which are used to provide and adjust the required pressure;

[0055] The temperature control component is used to adjust the temperature in the adsorption tower. The temperature control component includes a temperature sensor, a heater, and a cooler. The temperature sensor is arranged at the inlet and outlet of the adsorption tower and above the adsorption layer. The detected temperature is transmitted to the controller, and the controller controls the opening and closing of the heater and the cooler.

[0056] For details, please refer to Figure 1 and Figure 2 , the connecting pipe 4 connects the pretreatment unit 21 and the pressure swing adsorption unit 23, the tail gas is injected into the pressure swing adsorption unit 23, and the zeolite and activated carbon filled in the adsorption tower are used to adsorb the odor in the tail gas and the organic compounds such as hydrocarbons, alcohols, esters in the tail gas, thereby reducing the concentration of VOCs in the tail gas and reducing the emission of harmful odors and gases. The pressure control component and the temperature control component are used in coordination to ensure the stability of the tail gas pressure during the adsorption process and to ensure that the temperature in the adsorption tower meets different adsorption conditions;

[0057] The tail gas purification unit 24 includes a catalytic reactor filled with a catalyst, a heating plate and a temperature sensor are provided in the catalytic reactor, a gas exhaust pipe is installed on the catalytic reactor, and a gas valve is installed on the gas exhaust pipe;

[0058] Specific references Figure 1 The exhaust gas after initial purification is further discharged into the catalytic reactor. The heating plate and the temperature sensor together constitute an intelligent temperature control system, which can monitor and adjust the reaction temperature in real time to meet the needs of the catalytic reaction and prevent potential safety risks. The temperature sensor monitors the temperature to control the reaction rate, and the heating plate provides the required temperature and conditions for the catalytic reaction.

[0059] Embodiment three:

[0060] This embodiment is different from the first and second embodiments. The sensors in the control system 3 include: a temperature sensor for temperature control of exhaust gas treatment; a pressure sensor for monitoring pressure changes in the exhaust gas pipeline; a gas concentration sensor, which is fixedly connected to 13 and the gas exhaust pipe through a flange, and is used to detect the concentration of harmful gases in the exhaust gas to ensure that the emission meets environmental protection standards;

[0061] Actuators, including gas valves, are installed on the exhaust gas transmission pipeline;

[0062] sirens, including audible and visual sirens;

[0063] For details, please refer to Figure 1 When in use, during the recovery process of unorganized exhaust gas emitted by ultra-high molecular weight polyethylene fibers, multiple temperature sensors need to be adapted and arranged in the adsorption tower of the pressure swing adsorption unit 23 and the catalytic reactor of the exhaust gas purification unit 24 for temperature regulation of exhaust gas treatment. The use of the gas valve facilitates the regulation of the gas emission flow rate. When the set value exceeds or falls below the original set value, the sound and light alarm can sound an alarm accordingly so that the staff can discover and check in time.

[0064] Another technical solution provided by the present invention is to provide a technology for recovering tail gas from unorganized emission of ultra-high molecular weight polyethylene fibers, comprising the following steps:

[0065] The first step: install the dome-type gas collecting hood 11 above the ultra-high molecular weight polyethylene fiber production line, and fix the exhaust emission pipe on the production line to the sealed gas collecting hood 12 accordingly, so that the sealed and unsealed exhaust gases generated in the production and preparation process of the ultra-high molecular weight polyethylene fiber are introduced into the exhaust gas collection system 1 through the collection pipe 13, wherein the collection pipe 13 is equipped with a gas concentration sensor to monitor the chemical composition and concentration of the exhaust gas in real time, which is very important for understanding the exhaust gas composition, evaluating the environmental performance of the production process, and ensuring the exhaust gas treatment effect;

[0066] Step 2: The exhaust gas collected is injected into the exhaust gas treatment system 2 through the connecting pipe 4, and passes through the pretreatment unit 21. The exhaust gas is filtered and impurities are removed by the filter cylinder inside the pretreatment unit. The filter pore size is 0.1 to 10 microns (μm), and the suspended particles (fiber fragments, dust), microorganisms (bacteria, pathogens), and some VOCs in the exhaust gas are effectively filtered out;

[0067] Step 3: The exhaust gas is discharged through the membrane separation unit 22 and further filtered by the VOC hydrocarbon membrane to deeply purify the exhaust gas, further remove the tiny particles and volatile organic compounds (VOCs) in the exhaust gas, and reduce the emission of harmful substances;

[0068] Step 4: The purified tail gas is further discharged to the adsorption unit 23 through 4, and the adsorbent in the adsorption tower (including zeolite and activated carbon) removes its odor and adsorbs certain inorganic gases in the tail gas, such as ammonia and hydrogen sulfide, to ensure the cleanliness of the tail gas;

[0069] Step 5: The exhaust gas finally enters the catalytic reactor in the exhaust gas purification unit 24, which is filled with catalytic reactants to remove harmful substances in the exhaust gas that are difficult to remove by physical methods (such as filtration and adsorption), such as nitrogen oxides (NOx), carbon monoxide (CO) and incompletely burned hydrocarbons (HC), so as to achieve efficient purification of the exhaust gas. The purified exhaust gas can be discharged through the exhaust pipe for recovery.

[0070] It should be noted that the above implementation process is only to illustrate the feasibility of the present application, but this does not mean that the operating tunnel deformation control construction method of the present application has only the above-mentioned single implementation process. On the contrary, as long as the operating tunnel deformation control construction method of the present application can be implemented, it can be included in the feasible implementation plan of the present application.

[0071] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "examples", "specific examples", or "some examples" means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner.

[0072] The above-mentioned embodiments only express several implementation methods of the present invention, and the description thereof is relatively specific and detailed, but it cannot be understood as limiting the scope of the present invention. It should be pointed out that, for a person of ordinary skill in the art, several variations and improvements can be made without departing from the concept of the present invention, and these all belong to the protection scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the attached claims.

Claims

1. Ultra-high molecular weight polyethylene fiber unorganized emission tail gas recovery technology, including: Tail gas collection system (1), tail gas treatment system (2), control system (3); The tail gas collection system (1) comprises a dome-type gas collection hood (11) and a fully enclosed gas collection hood (12) arranged at key emission points of an ultra-high molecular weight polyethylene fiber production line. The dome-type gas collection hood (11) is used to collect tail gas from emission points that cannot be completely enclosed, and the fully enclosed gas collection hood (12) is used to collect tail gas from emission points that can be completely enclosed. The collection pipe (13) is used to connect the dome-type gas collection hood (11) and the fully enclosed gas collection hood (12) with the tail gas collection system (1). An induced draft fan (14) is arranged on the collection pipe (13) to ensure that the tail gas can smoothly and efficiently enter the tail gas collection system (1). A gas concentration sensor is arranged on the collection pipe (13); The tail gas treatment system (2) comprises a pretreatment unit (21), a membrane separation unit (22), an adsorption unit (23) and a tail gas purification unit (24); the pretreatment unit (21) and the membrane separation unit (22) are used in combination; the pretreatment unit (21) and the adsorption unit (23) are connected via a connecting pipe, and a tail gas concentration detector is additionally provided at the end of the connecting pipe; the adsorption unit (23) and the tail gas purification unit (24) are connected via an exhaust pipe; A connecting pipe (4) is connected between the tail gas collection system (1) and the tail gas treatment system (2), and a gas valve is provided on the connecting pipe (4); The control system (3) adopts an automated control system to monitor and adjust each link of the exhaust gas collection and treatment system in real time. The control system (3) includes sensors and actuators to realize automatic collection, treatment and discharge of exhaust gas. The control system (3) has fault alarm and emergency treatment functions.

2. The ultra-high molecular weight polyethylene fiber unorganized emission tail gas recovery technology according to claim 1 is characterized in that: A filter cylinder is disposed in a three-dimensional shape on the upper part of the pretreatment unit (21). The filter cylinder is three-dimensionally distributed in a columnar shape and is made of glass fiber. The filter cylinder is a microporous filter with a pore size of 0.1 to 10 micrometers (μm).

3. The ultra-high molecular weight polyethylene fiber unorganized emission tail gas recovery technology according to claim 1 is characterized in that: An air flow hole is provided on the side of the filter screen cylinder, and the air flow hole and the connecting pipe (4) are interconnected.

4. The ultra-high molecular weight polyethylene fiber unorganized emission tail gas recovery technology according to claim 3 is characterized in that: The membrane separation unit (22) comprises a membrane assembly, which is the core component of the membrane separation unit (22). The membrane assembly is composed of a plurality of membrane elements, wherein the membrane elements are VOC hydrocarbon membranes, and the pore size of the VOC hydrocarbon membranes is 0.001 to 0.1 micrometers (μm).

5. The ultra-high molecular weight polyethylene fiber unorganized emission tail gas recovery technology according to claim 1, characterized in that: The VOC hydrocarbon membrane is arranged in a tilted state in the pretreatment unit (21), the VOC hydrocarbon membrane is provided with two layers, the two layers of VOC hydrocarbon membrane are tilted in opposite directions, and the diameter of the VOC hydrocarbon membrane matches the diameter of the filter cylinder.

6. The ultra-high molecular weight polyethylene fiber unorganized emission tail gas recovery technology according to claim 1, characterized in that: The pressure swing adsorption unit (23) comprises: The adsorption tower is loaded with an adsorbent, which includes zeolite and activated carbon, has a high specific surface area and porosity, and can effectively adsorb hydrocarbon components in the tail gas; A pressure control component, used to adjust the pressure in the adsorption tower. The pressure control component includes a compressor and a vacuum pump, which are used to provide and adjust the required pressure; The temperature control component is used to adjust the temperature in the adsorption tower. The temperature control component includes a temperature sensor, a heater, and a cooler. The temperature sensors are arranged at the inlet and outlet of the adsorption tower and above the adsorption layer. The detected temperature is transmitted to the controller, and the controller controls the opening and closing of the heater and the cooler.

7. The technology for recovering tail gas from unorganized emission of ultra-high molecular weight polyethylene fibers according to claim 1, characterized in that: The tail gas purification unit (24) comprises a catalytic reactor filled with a catalyst, a heating plate and a temperature sensor are arranged in the catalytic reactor, a gas exhaust pipe is installed on the catalytic reactor, and a gas valve is installed on the gas exhaust pipe.

8. The ultra-high molecular weight polyethylene fiber unorganized emission tail gas recovery technology according to claim 1, characterized in that: The sensors in the control system (3) include: a temperature sensor for controlling the temperature of the exhaust gas treatment; a pressure sensor for monitoring the pressure change in the exhaust gas pipeline; a gas concentration sensor, fixedly connected to (13) and the gas exhaust pipe through a flange, for detecting the concentration of harmful gases in the exhaust gas to ensure that the emission meets environmental protection standards; Actuators, including gas valves, are installed on the exhaust gas transmission pipeline; Sirens, including audible and visual sirens.

9. The ultra-high molecular weight polyethylene fiber unorganized emission tail gas recovery technology according to claim 1, characterized in that: The steps include: S1: A dome-type gas collecting hood (11) is installed above the ultra-high molecular weight polyethylene fiber production line, and the exhaust gas emission pipe on the production line is fixedly connected to the sealed gas collecting hood (12) so that the sealed and unsealed exhaust gases generated in the production process of the ultra-high molecular weight polyethylene fiber are introduced into the exhaust gas collection system (1) through the collection pipe (13), wherein a gas concentration sensor is installed on the collection pipe (13) to monitor the chemical composition and concentration of the exhaust gas in real time, which is very important for understanding the exhaust gas composition, evaluating the environmental performance of the production process, and ensuring the exhaust gas treatment effect; S2: The exhaust gas collected is injected into the exhaust gas treatment system (2) through the connecting pipe (4), and passes through the pretreatment unit (21). The exhaust gas is filtered and removed by the filter cylinder inside the pretreatment unit. The filter pore size is 0.1 to 10 microns (μm), and the suspended particles (fiber fragments, dust), microorganisms (bacteria, pathogens), and some VOCs in the exhaust gas are effectively filtered out; S3: the exhaust gas is discharged through the membrane separation unit (22) and further filtered by the VOC hydrocarbon membrane to deeply purify the exhaust gas, further remove the tiny particles and volatile organic compounds (VOCs) in the exhaust gas, and reduce the emission of harmful substances; S4: The purified tail gas is further discharged into the adsorption unit (23) through (4), and the adsorbent in the adsorption tower (including zeolite, activated carbon) removes the odor and adsorbs certain inorganic gases in the tail gas, such as ammonia and hydrogen sulfide, to ensure the cleanliness of the tail gas; S5: The tail gas finally enters the catalytic reactor in the tail gas purification unit (24), which is filled with catalytic reactants to remove harmful substances in the tail gas that are difficult to remove by physical methods (such as filtration and adsorption), such as nitrogen oxides (NOx), carbon monoxide (CO) and incompletely burned hydrocarbons (HC), so as to achieve efficient tail gas purification. The purified tail gas can be discharged through the exhaust pipe for recovery.

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