Marine Engineering VOCs Mobile Treatment Equipment

Abstract

The present invention discloses a mobile treatment device for VOCs in ocean engineering, which relates to the technical field of waste gas treatment in ocean engineering, shipbuilding and repair. It includes a paint mist filter disposed in a paint removal chamber. One side of the paint removal chamber is communicated with an air inlet, and the other side is communicated with a purification chamber. An activated carbon adsorption bed is disposed in the purification chamber, and the purification chamber is communicated with an air outlet. Among them, it also includes an external desorption and regeneration system and a catalytic combustion device. The desorption and regeneration system is used for desorption and regeneration, and the catalytic combustion device is used for burning the desorbed gas. According to the mobile treatment device for VOCs in ocean engineering of the present invention, the paint mist filter and the activated carbon adsorption bed are used to efficiently treat the paint mist and organic substances in the construction waste gas, with a remarkable paint mist filtering effect and high operating efficiency. Moreover, in cooperation with the external desorption and regeneration system and the catalytic combustion device, the activated carbon adsorption bed is uniformly collected, regenerated and treated, and the desorbed waste gas is catalytically treated to form purified gas, so that the system has a lower operating cost and a longer service life.

Description

Technical Field

[0001] The present invention relates to the technical field of waste gas treatment in ocean engineering, shipbuilding and repair, and particularly relates to a mobile VOCs treatment device for ocean engineering. Background Art

[0002] With the development of industry, environmental problems are becoming increasingly severe. Among them, the pollution problem of volatile organic compounds (VOCs) has received widespread attention from countries around the world after SOx, NOx and freons. With the gradual improvement and strictness of environmental protection regulations, the treatment of VOCs will show an explosive growth. VOCs generated in the industrial production process are one of its main sources, with low concentration and complex waste gas components.

[0003] Currently, there are mainly two common treatment methods: one is the destructive elimination method, such as regenerative combustion method and catalytic combustion method; the other is the recovery method, such as steam desorption condensation method, absorption method and membrane separation method. Due to the low waste gas concentration and large air volume, the above treatment methods all have disadvantages such as high investment cost, large energy waste and low economic efficiency.

[0004] Chinese Patent CN 201811075851.7 discloses a VOCs treatment device and a VOCs treatment method, including a plasma module assembly. The plasma module assembly includes a treatment chamber, a first electrode member, a second electrode member and a molecular sieve. The treatment chamber is provided with a treatment chamber inlet and a treatment chamber outlet; the first electrode member extends through the treatment chamber; the second electrode member has a current polarity opposite to that conducted by the first electrode member, and the second electrode member forms a part of the treatment chamber and is arranged close to and spaced from the first electrode member; the molecular sieve has hydroxyl groups and is arranged in the treatment chamber. The treatment device provided by the present invention can generate an electric field, which can act on the gas in the treatment chamber, causing the gas to discharge to generate a large number of active particles. The active particles can act on the hydroxyl groups on the molecular sieve, dissociate them into hydroxyl free radicals, and oxidize and decompose VOCs into small molecule substances such as CO2 and H2O by means of the oxidation performance of the hydroxyl free radicals.

[0005] VOCs waste gas generated during ship repair, on-site painting and paint mixing operations in shipbuilding is directly discharged into the atmosphere without any collection and treatment, and the discharge volume is large, which has a greater impact on the environment. Ships are huge in volume, complex in structure and scattered in operation points. The collection and treatment of VOCs waste gas in ship repair and shipbuilding on-site have always been difficult problems faced by the industry.

[0006] The above VOCs treatment equipment has not been specially optimized for the waste gas generated during the painting and paint mixing operations in ocean engineering, shipbuilding and repair on-site, with high maintenance costs and is not conducive to long-term operation. Moreover, the treatment efficiency of the waste gas generated in shipyard construction is poor, and it cannot efficiently treat the waste gas generated in shipyard construction. Summary of the Invention

[0007] The present invention aims to at least solve the technical problems existing in the prior art, namely, "VOCs waste gas generated during ship repair, on-site painting and paint mixing operations in shipbuilding is directly discharged into the atmosphere without any collection and treatment, and the discharge volume is large, causing a greater impact on the environment. The above VOCs treatment equipment has not been specially optimized for the waste gas generated during the painting and paint mixing operations in offshore engineering, shipbuilding and ship repair, and has a high maintenance cost, which is not conducive to long-term operation. Moreover, the treatment efficiency of the waste gas generated during the painting and paint mixing operations in offshore engineering, shipbuilding and ship repair is poor, and it is unable to efficiently treat the waste gas in shipyard construction". For this reason, the present invention provides a mobile VOCs treatment equipment for offshore engineering, which can efficiently treat the waste gas generated during the painting and paint mixing operations in offshore engineering, shipbuilding and ship repair, and has a low equipment construction cost, high operation efficiency, low operation cost and long service life.

[0008] The mobile VOCs treatment equipment for offshore engineering according to some embodiments of the present invention is applied to the painting and paint mixing operations in offshore engineering, shipbuilding and ship repair, and includes:

[0009] A mobile cabinet body is provided with an air inlet and an air outlet. An air removal chamber and a purification chamber are arranged inside the mobile cabinet body. The air inlet sequentially passes through the air removal chamber and the purification chamber and is connected to the air outlet;

[0010] A system fan is connected to the mobile cabinet body and is used to promote the flow of waste gas in the mobile cabinet body;

[0011] A paint mist filter is arranged in the air removal chamber. The paint mist filter is used to remove paint mist particles. One side of the air removal chamber is connected to the air inlet, and the other side is connected to the purification chamber;

[0012] An activated carbon adsorption bed is arranged in the purification chamber and is used to purify the pollutants in the waste gas. The purification chamber is connected to the air outlet;

[0013] Among them, an external desorption regeneration system and a catalytic combustion device are further included. The desorption regeneration system is used to desorb and regenerate the activated carbon adsorption bed, and the catalytic combustion device is used to burn the gas desorbed by the desorption regeneration system.

[0014] According to some embodiments of the present invention, the paint mist filter is provided with a paint mist filtering layer. The paint mist filtering layer includes a glass fiber flame retardant filtering cotton layer and a high-efficiency filtering cotton layer. The glass fiber flame retardant filtering cotton layer is arranged on the side facing the air inlet, and the high-efficiency filtering cotton layer is arranged facing the purification chamber.

[0015] According to some embodiments of the present invention, the activated carbon adsorption bed is provided with honeycomb activated carbon, and multiple groups of the activated carbon adsorption beds are arranged in the purification chamber.

[0016] According to some embodiments of the present invention, the marine engineering VOCs mobile treatment equipment includes at least four groups, and at least one group of the marine engineering VOCs mobile treatment equipment serves as a standby device; the filtration air velocity of the activated carbon adsorption bed of a single group of equipment is 1.2 m / s, and the filling amount of the activated carbon adsorption bed of a single group of equipment is not less than 1.44 m 3 .

[0017] According to some embodiments of the present invention, the desorption and regeneration system further includes a desorption fan and a supplementary cooling fan. The desorption fan is used to blow the organic matter on the activated carbon adsorption bed into the catalytic combustion device during the activated carbon desorption process, and the supplementary cooling fan is used to adjust the reaction temperature during the desorption process.

[0018] According to some embodiments of the present invention, the catalytic combustion device is provided with a heat exchanger, and the heat exchanger is used to transport the hot air generated by the catalytic combustion device to the desorption and regeneration system to reduce the energy consumption during the desorption process.

[0019] According to some embodiments of the present invention, fire safety equipment is also provided in the desorption and regeneration system and the catalytic combustion device, and the fire safety equipment is used to prevent the activated carbon adsorption bed from being damaged during the catalytic combustion process.

[0020] According to some embodiments of the present invention, the fire safety equipment is a water spray fire extinguishing device, and the starting temperature of the water spray fire extinguishing device is 120 °C.

[0021] According to some embodiments of the present invention, multiple groups of system fans are provided, and the air volume of each group of system fans is not less than 10520 m 3 / h, and the input power is not higher than 17 kw.

[0022] According to some embodiments of the present invention, the mobile cabinet adopts a sealed cabinet structure. Multiple groups of air inlets are provided, and each air inlet is provided with a manual valve, and the manual valve is used to control the opening and closing of the air inlet.

[0023] The marine engineering VOCs mobile treatment equipment according to some embodiments of the present invention has at least the following beneficial effects: the mobile cabinet can move to the painting position during the painting, paint mixing operations in marine engineering, shipbuilding and repair yards for waste gas treatment, and the movement is convenient. The paint mist filter and the activated carbon adsorption bed are used to efficiently treat the paint mist and organic matter in the construction waste gas, and the filtering effect on the paint mist is remarkable, and the operation efficiency is high. Moreover, in cooperation with the external desorption and regeneration system and the catalytic combustion device, the activated carbon adsorption bed is uniformly collected and regenerated, and the desorbed waste gas is catalytically treated to form purified gas, so that the system operation cost is lower and the service life is longer.

[0024] Additional aspects and advantages of the present invention will be given in part in the following description, become apparent in part from the following description, or be learned through the practice of the present invention. Brief Description of the Drawings

[0025] The above and / or additional aspects and advantages of the present invention will become apparent and be readily understood from the description of the embodiments in conjunction with the following drawings, in which:

[0026] Figure 1 is a schematic diagram of the marine engineering VOC mobile treatment equipment according to an embodiment of the present invention;

[0027] Figure 2 is a schematic diagram of the plural purification groups of the marine engineering VOC mobile treatment equipment according to an embodiment of the present invention;

[0028] Figure 3 is a schematic diagram of the air inlet of the marine engineering VOC mobile treatment equipment according to an embodiment of the present invention.

[0029] Reference Signs:

[0030] mobile cabinet 100, air inlet 110, manual valve 111, air outlet 120, paint removal chamber 130, purification chamber 140,

[0031] paint mist filter 200, paint mist filter layer 210, fiberglass flame-retardant filter cotton layer 211, high-efficiency filter cotton layer 212, activated carbon adsorption bed 300. Detailed Description of the Embodiments

[0032] Embodiments of the present invention will be described in detail below. Examples of the embodiments are shown in the drawings, where the same or similar reference numerals indicate the same or similar elements or elements having the same or similar functions throughout. The embodiments described below by referring to the drawings are exemplary and are only used to explain the present invention and should not be construed as a limitation of the present invention.

[0033] In the description of the present invention, it should be understood that the orientation or positional relationship indicated by terms such as up, down, front, back, left, right, top, bottom, etc., is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as a limitation of the present invention.

[0034] In the description of the present invention, "several" means one or more, "multiple" means more than two, and terms such as "greater than", "less than", "exceeding", etc. are understood not to include the corresponding number, while terms such as "above", "below", "within", etc. are understood to include the corresponding number. If there is a description of "first" and "second", it is only for the purpose of distinguishing technical features and cannot be understood as indicating or implying relative importance or implicitly indicating the quantity of the indicated technical features or the sequence relationship of the indicated technical features.

[0035] In the description of the present invention, unless otherwise clearly defined, terms such as "set", "install", "connect", etc. should be understood in a broad sense, and those skilled in the art can reasonably determine the specific meanings of the above terms in the present invention in combination with the specific content of the technical solution.

[0036] The following refers to Figures 1 - 3 Describe the marine engineering VOCs mobile treatment equipment according to an embodiment of the present invention.

[0037] As Figures 1 - 3 As shown, the marine engineering VOCs mobile treatment equipment is mainly applied in the processes of marine engineering, shipbuilding and repair yard painting and paint mixing operations. Specifically, in the process of ship painting, due to the large volume of ships, in the past, ship painting was directly discharged, and the annual emission reached more than 160 tons, which not only had a greater impact on the environment but also required the payment of high environmental protection taxes, which was not conducive to environmental protection and affected the sustainable development of enterprises.

[0038] During the painting operation, it will cause a relatively high instantaneous concentration, and locally generate high-concentration waste gas. After spatial mixed exhaust, the concentration of the waste gas will decrease. The marine engineering VOCs mobile treatment equipment of the present invention can reduce the concentration of waste gas VOCs to 90 mg / m 3 for emission, which is friendly to the environment. And because the processes of marine engineering, shipbuilding and repair yard painting and paint mixing operations are long-term projects, the waste gas treatment equipment needs to consider the problems of stable operation and use cost. The designed working time of the VOCs mobile treatment equipment of the present invention is 8 hours per day, and the annual working time is more than 300 days in total, which can meet the long-term use in the processes of marine engineering, shipbuilding and repair yard painting and paint mixing operations.

[0039] Specifically, the VOCs mobile treatment device of the present invention includes a mobile cabinet 100, a system fan (not shown in the drawings), a paint mist filter 200, and an activated carbon adsorption bed 300. The mobile cabinet 100 is provided with an air inlet 110 and an air outlet 120. Inside the cabinet, there is a paint removal chamber 130 and a purification chamber 140. The air inlet 110 passes through the paint removal chamber 130 and the purification chamber 140 in sequence and is connected to the air outlet 120. The waste gas enters the paint removal chamber 130 from the air inlet 110 to separate the paint mist and organic matter in the waste gas. Then, the organic matter in the waste gas is collected and adsorbed into the activated carbon adsorption bed 300 in the purification chamber 140. The air reaching the emission standard is ejected from the air outlet 120, realizing the entire waste gas treatment process. After the activated carbon adsorption bed 300 reaches the saturation state, it is uniformly collected into an external desorption regeneration system and a catalytic combustion device for desorption regeneration treatment, so that the activated carbon adsorption bed 300 resumes its working performance and continues to be used, reducing the operation cost of the treatment device. The mobile cabinet 100 can be transferred according to the actual painting area of the ship to achieve local waste gas treatment, with convenient setting and easy movement.

[0040] The system fan is connected to the mobile cabinet 100 and is used to promote the flow of waste gas in the mobile cabinet 100. In this embodiment, the total air volume of the system fan can reach 40000 m 3 / h, and the system fan can support a maximum of four groups of cabins to carry out painting operations simultaneously.

[0041] The paint mist filter 200 is arranged in the paint removal chamber 130. The paint mist filter 200 is used to remove paint mist particles. One side of the paint removal chamber 130 is connected to the air inlet 110, and the other side is connected to the purification chamber 140. It can adsorb the paint mist particles in the waste gas inhaled into the mobile cabinet 100, and the gas purified of paint mist particles enters the purification chamber 140 for subsequent steps. The paint mist filter 200 is set according to the characteristics of a large amount of painting in the production processes of offshore engineering, shipbuilding and repair outfield painting, and paint mixing operations. It can efficiently separate the paint mist particles in the waste gas and provide a better treatment basis for subsequent VOCs waste gas treatment.

[0042] The activated carbon adsorption bed 300 is arranged in the purification chamber 140 and is used to purify the pollutants in the waste gas. The purification chamber 140 is connected to the air outlet 120. After the waste gas removes the paint mist particles, it enters the activated carbon adsorption bed 300 in the purification chamber 140. The organic matter in the waste gas is captured by the activated carbon adsorption bed 300 to purify the air and make the air reach the emission standard.

[0043] Among them, a desorption and regeneration system (not shown in the drawings) and a catalytic combustion device (not shown in the drawings) are provided outside the processing device. Specifically, the desorption and regeneration system and the catalytic combustion device are fixedly arranged in the area for recovery and treatment. The saturated activated carbon adsorption bed 300 is transported to the desorption and regeneration base station for desorption and regeneration treatment. The desorption and regeneration system is used for desorbing and regenerating the activated carbon adsorption bed 300, and the catalytic combustion device is used for burning the gas desorbed by the desorption and regeneration system. Specifically, when the activated carbon adsorption bed 300 operates for a certain period of time, the activated carbon adsorption bed 300 reaches adsorption saturation. At this time, the desorption and regeneration system can release the organic matter adsorbed in the activated carbon adsorption bed 300 and catalytically treat it through the catalytic combustion device, generating harmless gas and discharging it into the air. Thus, the recycling of the activated carbon adsorption bed 300 is realized, and the equipment operation cost is reduced.

[0044] In some embodiments of the present invention, as Figure 1 and Figure 2 shown, the paint mist filter 200 is provided with a paint mist filtering layer 210. The paint mist filtering layer 210 includes a fiberglass flame-retardant filtering cotton layer 211 and a high-efficiency filtering cotton layer 212. The fiberglass flame-retardant filtering cotton layer 211 is arranged on the side facing the air inlet 110, and the high-efficiency filtering cotton layer 212 faces the purification chamber 140.

[0045] Specifically, in order to avoid the influence of small paint mist particles on the activated carbon adsorption bed 300, a paint mist filter 200 is provided in front of the activated carbon adsorption bed 300 to remove the paint mist particles in the waste gas. The paint mist filtering layer 210 uses a fiberglass flame-retardant filtering cotton layer 211 with high purification efficiency and no secondary pollution to purify the paint mist. This dry paint mist filtering material is a purification material specially developed for the characteristics of paint mist particles. Its dust holding capacity reaches 453 g / ㎡, the filtering efficiency for paint mist particles reaches 97%, and its resistance is only 27 Pa, which does not affect the flow of waste gas between the paint removal chamber 130 and the purification chamber 140 and ensures the treatment efficiency. It is composed of multiple layers of fiberglass, and the density gradually increases with the thickness. The last few layers are impregnated with resin material to play a supporting role. During filtration, the multiple layers of fibers intercept, collide, diffuse, absorb, etc. the paint mist particles, and the paint mist particles are accommodated in the material when the waste gas passes through.

[0046] This dry paint mist filtering material has a higher paint mist purification ability than the water curtain machine, and is also power-saving, does not require water, has low operating costs, and is easy to use. The fiberglass flame-retardant filtering cotton layer 211 adopted in this embodiment has the characteristics of high purification efficiency, large paint mist capacity, flame retardance, low filtering resistance, long service life, simple maintenance, and no secondary pollution. The fiberglass flame-retardant filtering cotton layer 211 saturated with paint mist can be reused multiple times after simple cleaning. Its cleaning method is simple and fast, and only by patting or vacuuming on the surface of the paint mist filtering layer 210 can the enriched paint mist particles be removed.

[0047] In order to improve the filtration efficiency of the waste gas in the purification chamber 140, a layer of high-efficiency filter cotton layer 212 is added between the fiberglass flame-retardant filter cotton layer 211 and the purification chamber 140, which plays an adsorption buffering role and improves the filtration efficiency.

[0048] In some embodiments of the present invention, such as Figure 1 and Figure 2 shown, the activated carbon adsorption bed 300 is provided with honeycomb activated carbon, and multiple groups of activated carbon adsorption beds 300 are arranged in the purification chamber 140.

[0049] Specifically, the purified waste gas is introduced into the activated carbon adsorption bed 300 provided with honeycomb activated carbon. The organic matter in the waste gas comes into full contact with the honeycomb activated carbon, and the gas is purified by using the strong adsorption property of the activated carbon for organic substances. The treated gas can meet the emission standards.

[0050] Utilizing the adsorption characteristics of the multi-micropores of activated carbon to adsorb organic waste gas is one of the most effective industrial treatment means. Honeycomb activated carbon has the advantages of stable performance, corrosion resistance, and resistance to high-speed air flow impact. Using it to adsorb organic waste gas can achieve high purification efficiency.

[0051] In a further embodiment, such as Figure 1 and Figure 2 shown, the offshore engineering VOCs mobile treatment equipment includes at least four groups, and at least one group of offshore engineering VOCs mobile treatment equipment is used as a standby equipment; the filtration air velocity of the activated carbon adsorption bed of a single group of equipment is 1.2 m / s, and the filling amount of the activated carbon adsorption bed of a single group of equipment is not less than 1.44 m 3 .

[0052] Specifically, in order to ensure the adsorption efficiency during the waste gas treatment process, the setting of the offshore engineering VOCs mobile treatment equipment is adopted to ensure the adsorption capacity of each group of treatment equipment to meet the large flow demand of the treatment equipment of the present invention. And in order to avoid a large decrease in the treatment efficiency of the equipment after the adsorption saturation of the working adsorption bed, there is also a replaceable standby offshore engineering VOCs mobile treatment equipment. When the adsorption of the treatment equipment working group is saturated, the activated carbon adsorption bed 300 is disassembled from the treatment equipment and transported to the desorption and regeneration base station for catalytic regeneration treatment. At the same time, the standby treatment equipment is enabled. During the process of enabling the standby treatment equipment, the desorption and regeneration system performs desorption and regeneration treatment on the disassembled group of the treatment equipment. Ensure that the desorption and regeneration of the activated carbon adsorption bed 300 is completed during the operation of the equipment, and the whole process is seamless, ensuring the continuous working ability of the equipment.

[0053] In some embodiments of the present invention, the desorption and regeneration system further includes a desorption fan and a cold air supplement fan. The desorption fan is used to blow the organic matter on the activated carbon adsorption bed 300 into the catalytic combustion device during the activated carbon desorption process, and the cold air supplement fan is used to adjust the reaction temperature during the desorption process. The desorption fan blows out the organic matter of each activated carbon adsorption bed 300, enabling the activated carbon adsorption bed 300 to resume its working ability. The structure of the desorption and regeneration system is a well-known technical solution to those skilled in the art and will not be described in detail in this embodiment.

[0054] In a further embodiment, the catalytic combustion device is provided with a heat exchanger, which is used to transport the hot air generated by the catalytic combustion device into the desorption and regeneration system to reduce the energy consumption during the desorption process. The structure of the catalytic combustion device is a well-known technical solution to those skilled in the art and will not be described in detail in this embodiment.

[0055] Specifically, the saturated activated carbon can be desorbed and regenerated with hot air. The hot air flow transfers heat to the organic solvent molecules adsorbed on the activated carbon, enabling them to have sufficient energy to break free from the surface tension of the activated carbon. During desorption, by controlling the flow rate of the desorption air flow, the concentration of the organic waste gas can be concentrated by 10 - 15 times. The desorption air flow is sent into the catalytic bed of the catalytic combustion device by the desorption fan and is heated to about 300 °C by the internal electric heating device. Under the action of the catalyst, an oxidation reaction occurs to generate CO2 and H2O and release a large amount of heat.

[0056] The hot air generated by catalytic combustion is used to promote the desorption of the organic matter adsorbed in the honeycomb activated carbon. The desorbed organic matter is sent into the catalytic combustion device by the desorption fan and burned. Under the action of the catalyst, it is converted into CO2 and H2O at about 300 °C and releases a large amount of heat. The heat enters the desorption and regeneration system through the heat exchanger, and the hot air blown out by the desorption fan at a certain temperature is used to desorb the organic matter on the activated carbon adsorption bed 300. Thereby, the energy consumption is reduced and the desorption effect of the desorption and regeneration system is improved.

[0057] During desorption, the temperature of the hot air is controlled within a certain range. When the temperature is too high, the cold air supplement fan is used to supplement cold air for cooling. The time for each desorption and regeneration is about 6 - 7 hours. High-quality precious metals palladium and platinum are loaded on the honeycomb ceramic as the catalyst, with a catalytic combustion rate of over 97%. The catalyst has a long service life, a low decomposition temperature, a short desorption preheating time, and low energy consumption. The control system is used to monitor the operation of the equipment, achieving full automation of the operation process, and the operation process is safe, stable, and reliable.

[0058] In some embodiments of the present invention, fire safety equipment is also provided in the desorption and regeneration base station. The fire safety equipment is used to prevent damage to the activated carbon adsorption bed 300 during the catalytic combustion process. The fire safety equipment is arranged inside the mobile cabinet 100 of the mobile cabinet 100 and can handle the abnormal state in the purification chamber 140 at any time to avoid the expansion of losses.

[0059] In a further embodiment, the fire safety equipment is a water spray fire extinguishing device (not shown in the drawings), and the activation temperature of the water spray fire extinguishing device is 120°C. Specifically, the fire water spray device is a common safety measure, which has the advantages of convenient material collection and low cost. Once the spray is activated, the activated carbon will be irreversibly damaged and cannot be used continuously, and all need to be replaced.

[0060] It should be understood that the use of the water spray fire extinguishing device for the fire safety equipment is not the only implementation method. In some other embodiments, carbon dioxide fire extinguishing, aerosol fire extinguishing and other methods can also be adopted according to actual production requirements. The fire extinguishing structures and methods of the fire safety equipment in the present invention will not be elaborated one by one. It should be understood that without departing from the basic concept of the present invention, the flexible transformation of the fire extinguishing structures and methods of the fire safety equipment should be regarded as being within the protection scope defined by the present invention.

[0061] In some embodiments of the present invention, there are multiple groups of system fans, and the air volume of each group of system fans is not less than 10520m 3 / h, and the input power is not higher than 17 kw. In this embodiment, the input power of the system fan is 15 kw, which has the characteristics of low energy consumption while ensuring a large air volume. Specifically, each group of system fans is arranged in the environment of spray painting operation and is connected to the air inlet 110 of the mobile cabinet 100 through a pipeline, and one group of system fans is arranged for each spray painting operation.

[0062] In some embodiments of the present invention, as Figures 1 - 3 shown, the mobile cabinet 100 adopts a sealed cabinet structure, and there are multiple groups of air inlets 110. Each air inlet 110 is provided with a manual valve 111, and the manual valve 111 is used to control the opening and closing of the air inlet 110. After the equipment runs for a certain period of time, the corresponding air inlet 110 can be closed through the manual valve 111 and the pipeline can be transferred to another spray painting operation environment for use. The closing of the manual valve 111 can prevent the paint mist in the paint removal chamber 130 from leaking internally during the process of pipeline transfer.

[0063] The offshore engineering VOCs mobile treatment equipment of the present invention has the following characteristics:

[0064] 1. Adopting the adsorption concentration + catalytic combustion combined process, the whole system realizes the closed circulation of the purification and desorption processes. Compared with the recovery type organic waste gas purification device, it does not need to be equipped with additional energy sources such as compressed air, does not produce secondary pollution during the operation process, and has low equipment investment and operation costs.

[0065] 2. Use specially formed honeycomb activated carbon as the adsorption material. Since its specific gravity is 8-10 times that of strip activated carbon fiber, the organic solvents adsorbed before regeneration can reach 12.5% of the total weight of the activated carbon, featuring a long service life, low operating resistance of the adsorption system, high purification efficiency, etc.

[0066] 3. A paint mist filter 200 is adopted before the activated carbon adsorption bed 300 to filter small particles, with high purification efficiency, ensuring the service life of the adsorption device.

[0067] After adopting the mobile VOCs treatment equipment for ocean engineering of the present invention, the maximum annual reduction of VOCs can be 94.811 tons, totaling 351,152 equivalents. According to the "Environmental Protection Tax Law", the charge for each equivalent is 1.8 yuan, so the annual environmental protection tax payable can be reduced by 632,000 yuan. The cost of each device is only 1 / 10 of that of the existing device. It only takes about one year to offset all the equipment costs through the environmental protection tax. It effectively reduces the enterprise's tax cost, indirectly creates benefits for the enterprise, and achieves the maximum utilization effect of environmental protection resources.

[0068] In the description of this specification, the description referring to terms such as "one embodiment", "some embodiments", "schematic embodiments", "examples", "specific examples", or "some examples", etc. means that the specific features, structures, materials, or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic expressions of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials, or characteristics described can be combined in a suitable manner in any one or more embodiments or examples.

[0069] Although the embodiments of the present invention have been shown and described, those of ordinary skill in the art can understand that various changes, modifications, substitutions, and variations can be made to these embodiments without departing from the principles and purposes of the present invention, and the scope of the present invention is defined by the claims and their equivalents.

Claims

1. A mobile VOCs treatment device for marine engineering, used in the field painting and paint mixing operations of marine engineering, shipbuilding and repair, characterized by: include: A mobile cabinet (100) is provided with an air inlet (110) and an air outlet (120); a paint removal bin (130) and a purification bin (140) are provided inside the mobile cabinet (100); the air inlet (110) passes through the paint removal bin (130) and the purification bin (140) in sequence and is communicated with the air outlet (120); a system fan connected to the movable cabinet (100) and used to promote the flow of exhaust gas within the movable cabinet (100); A paint mist filter (200) is arranged in the paint removal bin (130), and the paint mist filter (200) is used to remove paint mist particles. One side of the paint removal bin (130) is connected to the air inlet (110), and the other side is connected to the purification bin (140). The paint mist filter (200) is provided with a paint mist filter layer (210), and the paint mist filter layer (210) includes a glass fiber flame retardant filter cotton layer (211) and a high-efficiency filter cotton layer (212). The glass fiber flame retardant filter cotton layer (211) is arranged toward the side of the air inlet (110), and the high-efficiency filter cotton layer (212) faces the purification bin (140). The glass fiber flame retardant filter cotton layer (211) is composed of multiple layers of glass fiber, and the density gradually increases with thickness. The last few layers are impregnated with resin material to play a supporting role. An activated carbon adsorption bed (300) is disposed in the purification chamber (140) and is used to purify pollutants in the exhaust gas. The purification chamber (140) is in communication with the exhaust port (120); It also includes an external desorption and regeneration system and a catalytic combustion device, wherein the desorption and regeneration system is used to desorb and regenerate the activated carbon adsorption bed (300), and the catalytic combustion device is used to burn the gas desorbed by the desorption and regeneration system.

2. The marine engineering VOCs mobile treatment equipment according to claim 1, characterized in that: The activated carbon adsorption bed (300) is provided with honeycomb activated carbon, and a plurality of groups of the activated carbon adsorption beds (300) are provided in the purification chamber (140).

3. The marine engineering VOCs mobile treatment equipment according to claim 2, characterized in that: The marine engineering VOCs mobile treatment equipment includes at least four groups, at least one group of the marine engineering VOCs mobile treatment equipment serves as a backup device; The filtration wind speed of the activated carbon adsorption bed (300) of a single set of equipment is 1.2 m / s, and the filling amount of the activated carbon adsorption bed (300) of a single set of equipment is not less than 1.44 m 3 .

4. The marine engineering VOCs mobile treatment equipment according to claim 1, characterized in that: The desorption regeneration system further comprises a desorption fan and a supplementary cooling fan. The desorption fan is used to blow organic matter on the activated carbon adsorption bed (300) into the catalytic combustion device during the activated carbon desorption process, and the supplementary cooling fan is used to adjust the reaction temperature during the desorption process.

5. The marine engineering VOCs mobile treatment equipment according to claim 4, characterized in that: The catalytic combustion device is provided with a heat exchanger, and the heat exchanger is used to transport the hot air generated by the catalytic combustion device to the desorption regeneration system to reduce the energy consumption of the desorption process.

6. The marine engineering VOCs mobile treatment equipment according to claim 1, characterized in that: Fire safety equipment is also provided in the desorption regeneration system and the catalytic combustion device, and the fire safety equipment is used to prevent the activated carbon adsorption bed (300) from being damaged during the catalytic combustion process.

7. The marine engineering VOCs mobile treatment equipment according to claim 6, characterized in that: The fire safety equipment is a water sprinkler fire extinguishing device, and the activation temperature of the water sprinkler fire extinguishing device is 120°C.

8. The marine engineering VOCs mobile treatment equipment according to claim 1, characterized in that: The system fans are provided in multiple groups, and the air volume of each group of the system fans is not less than 10520m 3 / h, input power not higher than 17kw.

9. The marine engineering VOCs mobile treatment equipment according to any one of claims 1 to 8, characterized in that: The mobile cabinet (100) adopts a sealed cabinet structure, and the air inlets (110) are provided in multiple groups. Each of the air inlets (110) is provided with a manual valve (111), and the manual valve (111) is used to control the opening and closing of the air inlet (110).

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