A device and method for adsorbing and degrading total non-methane hydrocarbons

Abstract

The present invention discloses a non-methane total hydrocarbon adsorption and degradation device and method, belonging to the field of environmental protection technology. It includes an activated carbon adsorption tower, in which an activated carbon plate is arranged. An external cooling assembly is arranged at the bottom of the activated carbon adsorption tower. A cooling space for accommodating the activated carbon plate is provided in the external cooling assembly. A cooling medium for the activated carbon plate to sink into is accommodated in the cooling space, and there is a temperature difference between the cooling medium and the activated carbon plate. The non-methane total hydrocarbon adsorption and degradation device and method provided by the present invention, compared with the prior art, do not need to overcome the increased temperature during the regeneration of the activated carbon adsorption tower, can directly cool the activated carbon plate efficiently, thereby reducing the time consumed for the activated carbon plate to recover from the regenerated state to the working state, reducing the impact on the normal use of the activated carbon adsorption tower, and being beneficial to the environmental protection requirements of the oil refining industry.

Description

Technical Field

[0001] The present invention belongs to the field of environmental protection technologies, and specifically relates to a non-methane total hydrocarbon adsorption and degradation device and method. Background Art

[0002] In the oil refining process, the emissions of non-methane total hydrocarbons (NMHC) mainly come from the exhaust emissions of production devices and the breathing emissions of storage tanks. For the treatment of low-concentration and large-volume exhaust gases, the activated carbon adsorption method is widely used due to its high efficiency. As the core equipment, the activated carbon adsorption tower can effectively capture NMHC in the exhaust gas. When the activated carbon reaches the adsorption saturation state, it can be desorbed and regenerated by hot nitrogen, and then the desorbed NMHC gas is introduced into the catalytic combustion system for further treatment.

[0003] During the regeneration process of activated carbon, steam regeneration equipment is usually used inside the adsorption tower. Steam is sprayed through nozzles, and by using its high temperature and pressure, the NMHC on the activated carbon is desorbed, thereby realizing the regeneration of the adsorbent. After the regeneration is completed, the activated carbon plate needs to be cooled by a cooling device built in the adsorption tower to ensure that its temperature returns to the normal state with the function of adsorption and degradation, and then it can be put into use again. Although the regeneration process of activated carbon is quite mature, it still faces the following challenges:

[0004] After the regeneration of activated carbon, the temperature inside the adsorption tower will increase significantly, far exceeding the normal working temperature range. Therefore, the cooling device of the adsorption tower itself needs to first overcome this high-temperature state, and then it can effectively cool the activated carbon plate before being put into use. When the cooling device cools down, a large amount of heat will be discharged, which is easy to cause waste of waste heat and increase the use cost of the non-methane total hydrocarbon adsorption and degradation device.

[0005] And the cooling rate of the activated carbon after regeneration cannot be too fast. An overly fast cooling rate may cause uneven shrinkage of the internal pore structure of the activated carbon, affecting its specific surface area and porosity, thereby reducing the adsorption performance. Summary of the Invention

[0006] Aiming at the deficiencies of the prior art, the purpose of the present invention is to provide a non-methane total hydrocarbon adsorption and degradation device and method.

[0007] In the present invention, the regeneration of the activated carbon adsorption tower is carried out through the steam regeneration equipment arranged inside it. During the regeneration process, the steam temperature is usually controlled at 120°C to 140°C. During the steam regeneration process of the activated carbon plate, the temperature will increase with the heat transfer of the steam, but usually will not exceed 140°C.

[0008] In the present invention, during the normal operation of the activated carbon adsorption tower, the internal temperature of the activated carbon adsorption tower is maintained within 60°C. When the internal temperature exceeds 83°C, an automatic alarm should be triggered and the cooling device should be started. During the regeneration process of the activated carbon adsorption tower, the internal temperature will increase, but it is strictly controlled within the safe range.

[0009] In the present invention, during the normal operation of the activated carbon adsorption tower, the temperature of the activated carbon plate usually remains between 0°C and 20°C. During the regeneration process, the temperature of the activated carbon plate will increase significantly. The temperature of the activated carbon plate may reach 100°C to 110°C, at which time the activated carbon plate is in a state of losing its adsorption and degradation function.

[0010] In the present invention, the waste gas generated during the regeneration of the activated carbon plate is introduced into the incinerator and incinerated at high temperature to be converted into carbon dioxide and water vapor agents, thus meeting the emission requirements.

[0011] To achieve the foregoing invention object, the technical solutions adopted by the present invention include:

[0012] An activated carbon adsorption tower, in which an activated carbon plate is provided inside the activated carbon adsorption tower. An external cooling component, a heating component, and a drying component for drying the activated carbon plate are provided at the bottom of the activated carbon adsorption tower. A cooling space for accommodating the activated carbon plate is provided inside the external cooling component, and a cooling medium for the activated carbon plate to sink into is accommodated in the cooling space. There is a temperature difference between the cooling medium and the activated carbon plate;

[0013] A water circulation channel is provided inside the cooling space, and the cooling medium can flow through the water circulation channel;

[0014] The heating component can extract the waste heat gas inside the activated carbon adsorption tower to heat the cooling medium. When the heating component stops heating the cooling medium, the waste heat gas can be introduced into the drying component.

[0015] In the present invention, during the normal operation of the activated carbon adsorption tower, the inlet temperature of the activated carbon adsorption tower is controlled at about 35°C, the internal temperature of the activated carbon adsorption tower is maintained at about 50°C, and the temperature of the activated carbon plate is controlled at about 15°C. During the regeneration of the activated carbon plate, the steam temperature of the steam regeneration equipment is usually controlled at about 130°C, the temperature of the activated carbon plate is about 105°C, and the temperature of the cooling medium is about 85°C.

[0016] In the present invention, after the regeneration treatment of the activated carbon plate is completed, the activated carbon plate can be sunk into the cooling medium for temperature reduction treatment using the temperature difference. Compared with the prior art, there is no need to overcome the increased temperature during the regeneration of the activated carbon adsorption tower, and the activated carbon plate can be directly cooled efficiently, thereby reducing the time consumed for the activated carbon plate to recover from the regeneration state to the working state and reducing the impact on the normal use of the activated carbon adsorption tower, which is beneficial to the environmental protection requirements of the oil refining industry.

[0017] In the present invention, the cooling medium is water, and the activated carbon plate sinks into the water for temperature reduction treatment by using the temperature difference.

[0018] Preferably, the heating assembly includes a coil pipe and an air extraction pump. The air extraction pump is connected to the coil pipe. The air extraction pump can extract the waste heat gas in the activated carbon adsorption tower and send it into the coil pipe. A part of the coil pipe is arranged in the cooling medium, and the coil pipe is made of heat-conducting material.

[0019] In the present invention, after the regeneration of the activated carbon plate, the activated carbon plate will sink into the water. And the activated carbon adsorption tower will start its own cooling device for temperature reduction treatment. During this process, the waste heat gas generated by the regeneration process is extracted through the heating assembly and introduced into the coil pipe to heat up the cooling medium, so as to form a temperature difference with the activated carbon plate. By recycling the waste heat of the activated carbon plate regeneration, while reducing the energy consumption of the non-methane total hydrocarbon adsorption and degradation device, the cooling efficiency after the regeneration of the non-methane total hydrocarbon adsorption and degradation device is improved, and the use cost of the non-methane total hydrocarbon adsorption and degradation device is reduced.

[0020] It should be noted that the hot gas extracted by the heating assembly is the air with heat inside the activated carbon adsorption tower extracted again after the waste gas is removed at the end of the activated carbon regeneration. The extracted air with temperature can be directly discharged.

[0021] In the present invention, by heating the cooling medium to form a temperature difference with the activated carbon plate, the activated carbon exchanges heat with the cooling medium, thereby cooling the activated carbon plate, controlling the cooling speed of the activated carbon plate, avoiding too fast cooling speed of the activated carbon plate, which may cause the change or even damage of the microporous structure inside the activated carbon plate, and improving the regeneration effect of the activated carbon plate and the adsorption performance in the subsequent working state.

[0022] In the present invention, when the temperature of the activated carbon plate drops to a temperature close to that of the heated hot water, the hot water is slowly and continuously discharged. At the same time, an appropriate amount of cold water is continuously replenished into the cooling space. The cold water and the hot water are mixed to gradually reduce the temperature of the hot water in the cooling space, thereby forming a temperature gradient and continuously controlling the temperature drop of the activated carbon plate. And during this process, the activated carbon adsorption tower is still cooling through the cooling device.

[0023] Preferably, at least one limiting plate is arranged in the cooling space, and the limiting plate is arranged above the coil pipe.

[0024] Preferably, the drying assembly includes an air outlet end. A three-way valve is arranged in the heating assembly, and the three-way valve can selectively introduce the waste heat gas into the coil pipe or the air outlet end.

[0025] In the present invention, when the temperature of the activated carbon plate drops below 40°C, the cooling medium inside the cooling space is emptied, and then the heating component continuously extracts gas. The gas is introduced into the air outlet end by the three-way valve, and the air outlet end blows air onto the activated carbon plate, and at the same time, the moisture inside the activated carbon plate is dried in cooperation with the temperature of the activated carbon plate itself, and the activated carbon plate is further cooled by blowing air.

[0026] Preferably, at least one set of placement racks is vertically slidably arranged in the activated carbon adsorption tower, and the activated carbon plates are installed on the placement racks.

[0027] Preferably, a guiding plate is arranged in the cooling space, and the gap between the guiding plate and the cooling space is equal to the width of the placement rack.

[0028] A method for adsorbing and degrading non-methane total hydrocarbons includes the following steps:

[0029] S1. Introduce non-methane total hydrocarbon gas into the activated carbon adsorption tower;

[0030] S2. The non-methane total hydrocarbon gas enters the activated carbon plate for adsorption and degradation;

[0031] S3. The gas purified by the activated carbon plate is discharged through the activated carbon adsorption tower.

[0032] Compared with the prior art, the advantages of the present invention include:

[0033] (1) The non-methane total hydrocarbon adsorption and degradation device and method provided by the present invention heat the cold water in the cooling space by using the waste heat in the activated carbon adsorption tower, and can stepwise cool down with the help of water circulation. Without affecting the normal adsorption function of the activated carbon plate, it can quickly cool down the activated carbon plate, and after the cooling is completed, it can continue to use the waste heat in the activated carbon adsorption tower to dry the activated carbon plate.

[0034] (2) The non-methane total hydrocarbon adsorption and degradation device and method provided by the present invention can sink the activated carbon plate into the cooling medium for temperature difference cooling treatment after the regeneration treatment of the activated carbon plate. Compared with the prior art, it does not need to overcome the increased temperature during the regeneration of the activated carbon adsorption tower, and can directly cool down the activated carbon plate efficiently, thereby reducing the time consumed for the activated carbon plate to recover from the regeneration state to the working state, reducing the impact on the normal use of the activated carbon adsorption tower, and being beneficial to the environmental protection requirements of the oil refining industry;

[0035] (3) The non-methane total hydrocarbon adsorption and degradation device and method provided by the present invention can recycle the waste heat of the activated carbon plate regeneration, reduce the energy consumption of the non-methane total hydrocarbon adsorption and degradation device, improve the cooling efficiency after regeneration of the non-methane total hydrocarbon adsorption and degradation device, and reduce the use cost of the non-methane total hydrocarbon adsorption and degradation device;

[0036] (4) The non-methane total hydrocarbon adsorption and degradation device and method provided by the present invention can heat the cooling medium to form a temperature difference between it and the activated carbon plate, thereby cooling the activated carbon plate, further controlling the cooling rate of the activated carbon plate, avoiding too fast cooling rate of the activated carbon plate, which may cause the change or even damage of the microporous structure inside the activated carbon plate, improving the regeneration effect of the activated carbon plate and the adsorption performance in the subsequent working state;

[0037] (5) The non-methane total hydrocarbon adsorption and degradation device and method provided by the present invention. The activated carbon adsorption tower in the non-methane total hydrocarbon adsorption and degradation device can not only cool down by using its own cooling device, but also extract the residual heat gas inside the activated carbon adsorption tower through the heating component, further accelerating the cooling inside the activated carbon adsorption tower and improving the cooling efficiency of the activated carbon adsorption tower. BRIEF DESCRIPTION OF THE DRAWINGS

[0038] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, the drawings in the following description are only some embodiments recorded in the present application. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0039] Figure 1 It is the overall schematic diagram of a non-methane total hydrocarbon adsorption and degradation device in the present invention;

[0040] Figure 2 It is the connection structure schematic diagram of the air frame in the present invention;

[0041] Figure 3 It is the connection structure schematic diagram of the air outlet end in the present invention;

[0042] Figure 4 It is the connection structure schematic diagram of the activated carbon plate and the placement rack in the present invention;

[0043] Figure 5 It is the cross-sectional structure schematic diagram of the air frame in the present invention;

[0044] Figure 6 It is the connection structure schematic diagram of the load-bearing bar in the present invention;

[0045] Figure 7 It is the connection structure schematic diagram of the cold water tank in the present invention;

[0046] Figure 8 It is the flow block diagram of a non-methane total hydrocarbon adsorption and degradation device in the present invention.

[0047] Reference numerals:

[0048] 1. Activated carbon adsorption tower; 11. Tower body; 12. Air inlet end; 13. Air outlet end; 14. Support leg; 15. Bottom plate; 16. Wind frame; 17. Wind blocking plate; 2. External cooling assembly; 21. Cooling box; 22. Water inlet pipe; 23. Water outlet pipe; 24. Telescopic cylinder; 25. Placing rack; 251. Placing plate; 252. Short connecting rod; 253. Air outlet; 254. Placement port; 26. Guide plate; 27. Limiting plate; 3. Activated carbon plate; 4. Heating assembly; 41. Coiled pipe; 42. Three-way valve; 43. Short connecting pipe; 44. Passing-in pipe; 45. Air outlet end head; 5. Load-bearing strip; 6. Telescopic rod; 7. Sealing plate; 8. Cold water tank; 9. Circulation pump. Detailed implementation manner

[0049] In view of the deficiencies in the prior art, the inventors of this case have proposed the technical solution of the present invention through long-term research and a large number of practices. The following will further explain and illustrate the technical solution, its implementation process and principle, etc. in combination with the drawings in the embodiments of the present application and specific implementation cases.

[0050] It should be noted that the embodiments described below by referring to the drawings are exemplary and are only used to explain the present invention, and cannot be understood as a limitation to the present invention. The described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, the present invention covers any alternatives, modifications, equivalent methods and solutions made on the spirit, principle and scope of the present invention defined by the claims. All other embodiments obtained by those of ordinary skill in the art without creative efforts belong to the scope of protection of the present invention.

[0051] In the description of the present application, words such as "first", "second", "third" and the like do not represent any order, quantity or importance, but are only used to distinguish different components. Similarly, words such as "one" or "a" do not represent a quantity limitation, but mean that there is at least one. Words such as "include" or "comprise" mean that the elements or objects appearing before "include" or "comprise" cover the elements or objects listed after "include" or "comprise" and their equivalents, and do not exclude other elements or objects. Words such as "connect" or "be connected" are not limited to physical or mechanical connections, but may include electrical connections, whether direct or indirect.

[0052] In the description of the present application, the orientation or positional relationship indicated by terms such as "center", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present application 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 therefore should not be construed as a limitation to the present application. In addition, when using position terms such as both sides, outer side, upper and lower, etc., it should be understood that they are only used for easy understanding and description, considering that the structure may face other positions.

[0053] In the description of the present application, unless otherwise clearly specified and defined, the technical terms or scientific terms used should have the ordinary meaning understood by those with general skills in the field to which the present application belongs. Terms such as "installation", "connection", "connection", etc. should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or a contact connection or an integral connection; for those of ordinary skill in the art, the specific meanings of the above terms in the present application can be understood according to specific circumstances.

[0054] The embodiments of the present invention are intended to introduce and explain the structural composition of a non-methane total hydrocarbon adsorption and degradation device and method and the cooperation relationship between the various component structures. Unless otherwise specified, the dimensions, materials, manufacturing processes, etc. of the various components suitable for the non-methane total hydrocarbon adsorption and degradation device and method in the embodiments of the present invention can be selected according to specific circumstances, and no special limitations and explanations are made here.

[0055] Furthermore, in order to enable the public to have a better understanding of the present invention, in the following detailed description of the present invention, some specific detailed parts are described in detail. Those skilled in the art can fully understand the present invention without the description of these detailed parts.

[0056] Embodiment 1

[0057] Please refer to Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5 and Figure 6 , a non-methane total hydrocarbon adsorption and degradation device, including an activated carbon adsorption tower 1.

[0058] Specifically, the activated carbon adsorption tower 1 includes four support legs 14 fixedly connected to its bottom. The bottoms of the four support legs 14 are commonly connected to a bottom plate 15. The activated carbon adsorption tower 1 has a tower body 11, an air inlet end 12, and an air outlet end 13. Non-methane total hydrocarbons enter the tower body 11 through the air inlet end 12, are adsorbed by the activated carbon plate 3 in the tower body 11, and then discharged through the air outlet end 13.

[0059] Specifically, two sets of placement racks 25 are arranged inside the tower body 11. Each set of placement racks 25 includes two vertically arranged placement plates 251. Four short connecting rods 252 are fixedly connected between the two placement plates 251. The two placement plates 251 are fixedly connected through the four short connecting rods 252. A plurality of air vents 253 are penetrated and opened in the placement plates 251. The activated carbon plates 3 are fixedly connected to the placement plates 251, and the installation positions between the two activated carbon plates 3 in the vertical direction are opposite to each other.

[0060] Specifically, two wind racks 16 are fixedly connected inside the tower body 11. A wind blocking plate 17 is fixedly connected to the side of the two wind racks 16 close to the air outlet end 13. The channel formed between the two wind racks 16 is blocked by the wind blocking plate 17. When the total non-methane hydrocarbons enter this channel, they will enter the activated carbon plates 3 through the air vents 253 for adsorption and degradation. The gas after adsorption and degradation enters the air outlet end 13 through the gaps between the top and bottom of the wind blocking plate 17 and the tower body 11, and is then discharged from the air outlet end 13.

[0061] Two placement openings 254 are penetrated and opened in each of the two wind racks 16. The two placement openings 254 in the vertical direction are commonly connected to a placement rack 25. A total of two sets of placement racks 25 are installed on the two wind racks 16, and the placement plates 251 are arranged inside the placement openings 254 at corresponding positions.

[0062] Two extraction openings for the placement racks 25 to be extracted to the outside of the tower body 11 are opened at the bottom of the tower body 11. Sealing plates 7 are fixedly connected to the top and bottom of each placement rack 25. The sealing plate 7 located at the bottom of the placement rack 25 can be sealed with the extraction opening to close the inside of the tower body 11. When it is necessary to extract the placement rack 25 with the activated carbon plates 3, the sealing plate 7 at the top of the placement rack 25 can be sealed with the extraction opening to close the inside of the tower body 11.

[0063] Specifically, four load-bearing bars 5 are slidably arranged on one of the wind racks 16. Two electric telescopic rods 6 are correspondingly arranged for each load-bearing bar 5. The telescopic ends of the electric telescopic rods 6 are fixedly connected to the load-bearing bars 5. The load-bearing bars 5 are fixedly connected to the wind racks 16. Load-bearing openings adapted to the load-bearing bars 5 are opened in the short connecting rods 252. One load-bearing bar 5 is inserted into each two load-bearing openings on the same side, so that when the placement rack 25 is inside the tower body 11, it can be stably arranged inside and its position can be fixed.

[0064] Please refer to Figure 1 、 Figure 2 、 Figure 3 and Figure 4 , a total non-methane hydrocarbons adsorption and degradation device, including an external cooling component 2.

[0065] Specifically, the external cooling assembly 2 includes a cooling tank 21 fixedly connected to the bottom of the tower body 11. Two extraction ports are arranged inside the cooling tank 21, and the cooling tank 21 has a cooling space for accommodating hot cooling medium and the activated carbon plate 3.

[0066] Specifically, the water circulation channel includes a water inlet pipe 22 and a water outlet pipe 23 fixedly connected inside the cooling tank 21. The water inlet pipe 22 and the water outlet pipe 23 are jointly connected to a cold water tank 8. A circulation pump 9 is fixedly connected to the water inlet pipe 22, and a flow control valve is fixedly connected to the water outlet pipe 23. The circulation flow direction of the cooling medium in the water circulation channel is successively: cold water tank 8 → circulation pump 9 → water inlet pipe 22 → cooling space → water outlet pipe 23 → flow control valve → cold water tank 8 to form a cycle. It should be noted that the bottom wall of the cooling space is an inclined surface, inclined towards the position where the water outlet pipe 23 is located. The water inside the cooling space will flow into the water outlet pipe 23 by its own weight and then flow into the cold water tank 8 through the water outlet pipe 23.

[0067] Specifically, four telescopic cylinders 24 are fixedly connected to the bottom of the cooling tank 21. The telescopic ends of every two telescopic cylinders 24 are jointly connected to a sealing plate 7 at the bottom of a placement rack 25.

[0068] In this embodiment, in the initial state, the load-bearing strip 5 is arranged in the load-bearing opening, and the telescopic end of the telescopic cylinder 24 is in the extended state. After the regeneration of the activated carbon plate 3 is completed, the telescopic end of the electric telescopic rod 6 is extended by energizing it, so that the load-bearing strip 5 is pulled out from the load-bearing opening. By starting the telescopic cylinder 24 to contract its telescopic end, the placement rack 25 is moved towards the inside of the cooling space, so that the activated carbon plate 3 sinks into the hot water for heat exchange, so as to cool the activated carbon plate 3.

[0069] It should be noted that when the telescopic end of the telescopic cylinder 24 contracts to the limit position, the sealing plate 7 at the top of the placement rack 25 will form a seal with the extraction port, preventing the hot air inside the tower body 11 from directly entering the cooling space, avoiding the direct contact between the relatively high-temperature waste heat and the activated carbon plate 3, and contributing to the cooling of the activated carbon plate 3.

[0070] Please refer to Figure 1 、 Figure 2 、 Figure 3 and Figure 4 , a non-methane total hydrocarbon adsorption and degradation device, including a heating assembly 4.

[0071] Specifically, the heating assembly 4 includes a coil 41 fixedly connected in the cooling space. The coil 41 is a heat-conducting material, specifically iron. One end of the coil 41 extends to the outside of the cooling box 21 and can be used for the exhaust gas area. The other end of the coil 41 extends only to the outside of the cooling box 21 and is fixedly connected to an inlet pipe 44. The inlet pipe 44 is connected to the interior of the tower body 11. An exhaust pump is fixedly connected to the inlet pipe 44, and the exhaust pump is fixedly connected to the bottom of the tower body 11.

[0072] In this embodiment, by starting the vacuum pump, the residual heat gas inside the tower body 11 can be sucked into the inlet pipe 44 and then sent into the coil 41 through the inlet pipe 44. The coil 41 introduces the heat in the gas into the cold water to heat it.

[0073] Specifically, four limit plates 27 are fixedly connected in the cooling space. When the two placement racks 25 are sunk into the hot water together, the weight of the placement racks 25 is jointly borne by the four limit plates 27 and the telescopic end of the telescopic cylinder 24. At the same time, the limit plates 27 are arranged above the coil 41, which can protect the coil 41 from contacting the placement racks 25.

[0074] Specifically, four guide plates 26 are fixedly connected to the middle of the cooling space, and each two guide plates 26 are symmetrically arranged, and the gap between the guide plates 26 and the cooling space is equal to the width of the placement rack 25, so that the placement rack 25 can move along the guide direction of the guide plates 26.

[0075] It also includes a drying component, which includes an air outlet end 45. A three-way valve 42 is provided in the heating component 4, and the three-way valve 42 can selectively introduce waste heat gas into the coil 41 or the air outlet end 45.

[0076] Specifically, the three-way valve 42 is fixedly connected to the inlet pipe 44, and the air outlet end 45 is fixedly connected to the inner wall of the cooling space. The air outlet end 45 has multiple air outlet holes, and the multiple air outlet holes are commonly connected to a short pipe 43. The three-way valve 42 has three ports, two of which are connected to the inlet pipe 44, and the other port is connected to the short pipe 43. The vacuum pump is arranged above the three-way valve 42.

[0077] Please refer to Figure 7 and Figure 8 The overall use process of the non-methane total hydrocarbon adsorption degradation device is as follows:

[0078] Under normal conditions of the non-methane total hydrocarbon adsorption degradation device,

[0079] The tower body 11 is sealed by the sealing plate 7, so that the interior of the activated carbon adsorption tower 1 is in a closed state. Four telescopic cylinders 24 provide support for the sealing plates 7 and the placement racks 25 connected in sequence. At the same time, the load-bearing bars 5 are arranged in the load-bearing openings, and the telescopic ends of the telescopic cylinders 24 are in an extended state, and the position of the placement racks 25 is positioned by the load-bearing bars 5.

[0080] When the non-methane total hydrocarbon adsorption degradation device is working,

[0081] Non-methane total hydrocarbons are discharged from the air inlet end 12 into the activated carbon adsorption tower 1 through a pipeline. The pore structure of the activated carbon plate 3 can capture and adsorb organic molecules, thereby separating NMHC from the gas phase, and then discharged through the air outlet end 13 to complete the adsorption and degradation process. It should be noted that when the activated carbon adsorption tower 1 is in normal operation, the temperature of the air inlet to the activated carbon adsorption tower 1 is controlled at about 35°C, the internal temperature of the activated carbon adsorption tower 1 is maintained at about 50°C, and the temperature of the activated carbon plate 3 is controlled at about 15°C. When the temperature of the activated carbon plate 3 exceeds 20°C, the cooling device inside the activated carbon adsorption tower 1 will be triggered to cool down.

[0082] When a large amount of NMHC adheres to the activated carbon plates 3, steam regeneration equipment is required to spray water vapor onto the activated carbon plates 3 through a nozzle. The high temperature of water vapor desorbs the NMHC from the activated carbon plates 3. The NMHC is then discharged from the steam outlet 13 and piped into the appropriate NMHC treatment equipment, completing the regeneration of the activated carbon plates 3. After regeneration is complete, the water vapor containing NMHC inside the tower body 11 has been evacuated, but hot air will remain inside the tower body 11. At this time, the activated carbon adsorption tower 1 is cooled by the cooling device built into the tower body 1.

[0083] During the overall cooling of the activated carbon adsorption tower 1, an appropriate amount of cold water inside the cooling tank is sent into the cooling space through the water inlet pipe 22 by the circulating pump 9. At this time, the flow of the flow control valve is adjusted to an extremely low state to limit the movement of the cold water, and then the vacuum pump is started to draw the residual heat gas inside the tower body 11 into the inlet pipe 44, and then sent into the coil 41 through the inlet pipe 44. The coil 41 introduces the heat in the gas into the cold water to heat it. The gas inside the coil 41 will be discharged into the air along the pipeline. In subsequent operations, the coil 41 will continue to discharge hot gas until the activated carbon plate 3 sinks into hot water for heat exchange, and then the vacuum pump is turned off. As the cooling device cools the entire activated carbon adsorption tower 1, the interior of the activated carbon adsorption tower 1 is further cooled by exhausting air to increase the cooling rate of the activated carbon adsorption tower 1. It should be noted that the steam temperature of the steam regeneration equipment is typically controlled at approximately 130°C, the temperature of the activated carbon plates 3 is approximately 105°C, and the temperature of the hot water is approximately 85°C. The temperature of the gas extracted by the exhaust pump decreases as the cooling device cools the activated carbon adsorption tower 1. When the temperature of the activated carbon adsorption tower 1 cools to approximately 50°C, the cooling device and exhaust pump are turned off. It takes approximately one hour for the entire activated carbon adsorption tower 1 to cool to its operating temperature.

[0084] After the activated carbon plate 3 is regenerated, the electric telescopic rod 6 is energized to extend its telescopic end, allowing the load-bearing bar 5 to be pulled out of the load-bearing opening. At this time, the placement rack 25 is in a movable state. The telescopic cylinder 24 is activated to retract its telescopic end, causing the placement rack 25 to move into the cooling space, allowing the activated carbon plate 3 to sink into the hot water for heat exchange. It should be noted that after the placement rack 25 enters the cooling space with the activated carbon plate 3, the tower body 11 is blocked by the sealing plate 7 on the top of the placement rack 25, so that the activated carbon adsorption tower 1 and the cooling space are still in a relatively independent and closed state.

[0085] While the activated carbon plates 3 are immersed in hot water for heat exchange, the flow rate of the flow control valve is adjusted, and the circulating pump 9 is turned on to begin introducing cold water into the cooling space, so that the water inlet rate of the water inlet pipe 22 is greater than the water outlet rate of the water outlet pipe 23. This further promotes water flow without causing the water temperature in the cooling space to drop too quickly due to excessive flow rate. This creates a temperature gradient within the cooling space, allowing the flow of water to remove heat from the activated carbon plates 3. Simultaneously, the temperature is gradually reduced to prevent the activated carbon plates 3 from cooling too quickly, facilitating subsequent use. It should be noted that by removing the activated carbon plates 3 from the activated carbon adsorption tower 1 and allowing water circulation to remove the heat from the activated carbon plates 3, the time required to cool the activated carbon plates 3 from approximately 105°C to approximately 20°C is reduced to 30 minutes. Compared to the prior art, the activated carbon plates 3 do not need to first overcome the temperature generated during the regeneration of the activated carbon adsorption tower 1. Removing the activated carbon plates 3 from the outside allows for direct heat dissipation, thereby improving the heat dissipation efficiency of the activated carbon plates 3.

[0086] When the temperature of the activated carbon plate 3 drops to about 20 °C, there are two treatment options.

[0087] The first treatment option is:

[0088] Start the telescopic cylinder 24 to extend its telescopic end, and drive the placement rack 25 and the activated carbon plate 3 to move back to their original positions, reinstall them inside the activated carbon adsorption tower 1, and use the remaining heat inside the activated carbon adsorption tower 1 to dry the moisture inside the activated carbon plate 3, then it can be put into use.

[0089] The second treatment option is:

[0090] Close the circulation pump 9 to stop the water from entering the cooling space. Adjust the flow rate control valve to the maximum, so that the water inside the cooling space flows into the cooling tank 8 along the outlet pipe 23 by its own weight. Then, through the conversion of the three-way valve 42, the hot air leading to the coil 41 is switched to the short connection pipe 43. The hot air is transmitted from the short connection pipe 43 to the air outlet end 45, and the hot air is sprayed from the air outlet holes of the air outlet end 45 onto the activated carbon plate 3 for drying. The gas inside the cooling space will be discharged into the cooling tank 8 through the outlet pipe 23 and discharged from the opening at the top of the cooling tank 8. After drying, start the telescopic cylinder 24 to extend its telescopic end, and drive the placement rack 25 and the activated carbon plate 3 to move back to their original positions, reinstall them inside the activated carbon adsorption tower 1, and then it can be put into use.

[0091] In summary, for the first treatment option, it can be directly put into the activated carbon adsorption tower 1 after cooling, and dried by the temperature inside the activated carbon adsorption tower 1, without adding extra components for drying, reducing the drying cost of the activated carbon plate 3. For the second treatment option, by emptying the cooling space and then drying with hot air blowing, compared with the first option, it blows hot air specifically onto the activated carbon plate 3, and the time required for the activated carbon plate 3 to enter the working state is shorter, but the drying cost increases.

[0092] It should be understood that the above embodiments are only used to illustrate the technical concept and features of the present invention. The purpose is to enable those skilled in the art to understand the content of the present invention and implement it accordingly. It cannot be determined that the specific implementation of the present invention is only limited to these descriptions. For those of ordinary skill in the technical field to which the present invention belongs, without departing from the concept of the present invention, several simple deductions or substitutions can still be made. Any equivalent changes or modifications made according to the spirit of the present invention should be covered within the protection scope of the present invention.

Claims

1. A non-methane total hydrocarbon adsorption and degradation device, including an activated carbon adsorption tower (1), wherein an activated carbon plate (3) is arranged inside the activated carbon adsorption tower (1), and is characterized in that, An external cooling component (2), a heating component, and a drying component for drying an activated carbon plate (3) are provided at the bottom of the activated carbon adsorption tower (1). A cooling space for accommodating the activated carbon plate (3) is provided inside the external cooling component (2). A cooling medium for the activated carbon plate (3) to sink into is accommodated in the cooling space. There is a temperature difference between the cooling medium and the activated carbon plate (3). A water circulation channel is provided in the cooling space, and the cooling medium can flow through the water circulation channel. The heating component can extract the waste heat gas inside the activated carbon adsorption tower (1) to heat the cooling medium, and when the heating component stops heating the cooling medium, it can introduce the waste heat gas into the drying component.

2. The non-methane total hydrocarbon adsorption and degradation device according to claim 1, characterized in that: The heating component includes a coiled pipe (41) and an air extraction pump. The air extraction pump is connected to the coiled pipe (41). The air extraction pump can extract the waste heat gas inside the activated carbon adsorption tower (1) and send it into the coiled pipe (41). A part of the coiled pipe (41) is arranged in the cooling medium, and the coiled pipe (41) is made of a heat-conducting material.

3. The non-methane total hydrocarbon adsorption and degradation device according to claim 2, wherein: At least one limiting plate (27) is arranged in the cooling space, and the limiting plate (27) is arranged above the coiled pipe (41).

4. The non-methane total hydrocarbon adsorption and degradation device according to claim 2, characterized in that: The drying component includes an air outlet end (45). A three-way valve (42) is arranged inside the heating component. The three-way valve (42) can selectively introduce the waste heat gas into the coiled pipe (41) and the air outlet end (45).

5. The non-methane total hydrocarbon adsorption and degradation device according to claim 1, wherein: At least one set of placement racks (25) is arranged to slide vertically in the activated carbon adsorption tower (1), and the activated carbon plate (3) is installed on the placement racks (25).

6. The non-methane total hydrocarbon adsorption and degradation device according to claim 5, characterized in that: A guiding plate (26) is arranged in the cooling space, and the gap between the guiding plate (26) and the cooling space is equal to the width of the placement rack (25).

7. A method for adsorbing and degrading non-methane total hydrocarbons of a non-methane total hydrocarbon adsorption and degradation device according to any one of claims 1-6, characterized in that, It includes the following steps: S1. Introduce non-methane total hydrocarbon gas into the activated carbon adsorption tower (1). S2. The non-methane total hydrocarbon gas enters the activated carbon plate (3) for adsorption and degradation. S3. The gas purified by the activated carbon plate (3) is discharged through the activated carbon adsorption tower (1).

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