Non-methane hydrocarbon adsorption and degradation device and method

Abstract

The invention discloses a non-methane total hydrocarbon adsorption and degradation device and method, and belongs to the technical field of environmental protection, the non-methane total hydrocarbon adsorption and degradation device comprises an activated carbon adsorption tower, an activated carbon plate is arranged in the activated carbon adsorption tower, an outer cooling assembly is arranged at the bottom of the activated carbon adsorption tower, and a cooling space for accommodating the activated carbon plate is arranged in the outer cooling assembly; a cooling medium used for sinking of the activated carbon plate is contained in the cooling space, and a temperature difference exists between the cooling medium and the activated carbon plate. Compared with the prior art, the non-methane total hydrocarbon adsorption and degradation device and method provided by the invention have the advantages that the temperature increased during regeneration of an activated carbon adsorption tower does not need to be overcome, and the activated carbon plate can be efficiently and directly cooled, so that the time consumed for recovering the activated carbon plate from a regeneration state to a working state is shortened; the influence on normal use of the activated carbon adsorption tower is reduced, and the environment-friendly requirement of the oil refining industry is met.

Description

Technical Field

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

[0002] In the oil refining process, the emission of non-methane hydrocarbons (NMHC) mainly comes from the exhaust gas emissions of production equipment and the respiratory emissions of storage tanks. For the treatment of low-concentration and large-volume exhaust gas, 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 of activated carbon, steam regeneration equipment is usually used to spray water vapor through the nozzle inside the adsorption tower, and use its high temperature and pressure to desorb NMHC on the activated carbon, thereby achieving the regeneration of the adsorbent. After regeneration is completed, the activated carbon plate needs to be cooled by the cooling device built into the adsorption tower to ensure that its temperature returns to a normal state with adsorption and degradation functions, and then it can be put back into use. Although the regeneration process of activated carbon is quite mature, it still faces the following challenges:

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

[0005] In addition, the cooling rate of activated carbon after regeneration cannot be too fast. Too fast a 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] In view of the deficiencies in the prior art, the object of the present invention is to provide a device and method for adsorption and degradation of non-methane total hydrocarbons.

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

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

[0009] In the present invention, when the activated carbon adsorption tower is in normal operation, the temperature of the activated carbon plate is usually maintained at 0°C to 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 the 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, incinerated at high temperature, and converted into carbon dioxide and water vapor, thereby meeting the emission requirements.

[0011] In order to achieve the above-mentioned invention object, the technical solution adopted by the present invention includes:

[0012] An activated carbon adsorption tower, wherein an activated carbon plate is arranged in the activated carbon adsorption tower, an external cooling component, a heating component and a drying component for drying the activated carbon plate are arranged at the bottom of the activated carbon adsorption tower, a cooling space for accommodating the activated carbon plate is arranged in the external cooling component, a cooling medium for sinking the activated carbon plate is accommodated in the cooling space, and a temperature difference exists between the cooling medium and the activated carbon plate;

[0013] A water circulation channel is provided in the cooling space, and the water circulation channel can circulate the cooling medium;

[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, when the activated carbon adsorption tower is in normal operation, the temperature of the activated carbon adsorption tower inlet air 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. When the activated carbon plate is regenerated, 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 activated carbon plate regeneration treatment is completed, the activated carbon plate can be sunk into a cooling medium and cooled by utilizing 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 by 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 needs of the oil refining industry.

[0017] In the present invention, the cooling medium is water, and the activated carbon plate is sunk into the water to perform a cooling process using the temperature difference.

[0018] Preferably, the heating component includes a coil and an exhaust pump, the exhaust pump is connected to the coil, the exhaust pump can extract the waste heat gas in the activated carbon adsorption tower and send it into the coil, a part of the coil is set in the cooling medium, and the coil is a heat-conducting material.

[0019] In the present invention, after the activated carbon plate is regenerated, the activated carbon plate will sink into the water, and the activated carbon adsorption tower will start its own cooling device to perform cooling treatment. In this process, the waste heat gas generated by the regeneration process is extracted by the heating component and passed into the coil to heat the cooling medium to form a temperature difference with the activated carbon plate. By recycling the waste heat from the regeneration of the activated carbon plate, the energy consumption of the non-methane total hydrocarbon adsorption and degradation device is reduced, the cooling efficiency of the non-methane total hydrocarbon adsorption and degradation device after regeneration 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 air extracted by the heating component is the air with heat inside the activated carbon adsorption tower that is extracted again after the exhaust gas is extracted at the end of activated carbon regeneration. The extracted air with temperature can be discharged directly.

[0021] In the present invention, the cooling medium is heated to form a temperature difference between the cooling medium and the activated carbon plate, so that the activated carbon and the cooling medium exchange heat, thereby cooling the activated carbon plate, thereby controlling the cooling rate of the activated carbon plate, avoiding excessive cooling of the activated carbon plate, causing the internal microporous structure of the activated carbon plate to change direction or even be damaged, 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, and at the same time, a proper amount of cold water is continuously added to the cooling space. The cold water and 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. In this process, the activated carbon adsorption tower is still being cooled by the cooling device.

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

[0024] Preferably, the drying component includes an air outlet end, and a three-way valve is provided in the heating component, and the three-way valve can selectively introduce waste heat gas to the coil 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 gas is continuously extracted through the heating component, and the gas is introduced into the air outlet end by the three-way valve, and air is blown to the activated carbon plate from the air outlet end, and the moisture inside the activated carbon plate is dried in accordance with the temperature of the activated carbon plate itself, and the activated carbon plate is further cooled by blowing air.

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

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

[0028] A method for adsorption and degradation of non-methane total hydrocarbons comprises the following steps:

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

[0030] S2, 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 present invention provides a non-methane total hydrocarbon adsorption degradation device and method, which utilizes the waste heat in the activated carbon adsorption tower to heat the cold water in the cooling space, and can achieve step-by-step cooling with the help of water circulation. Under the premise of not affecting the normal adsorption function of the activated carbon plate, it can be quickly cooled down, and after the cooling is completed, the waste heat in the activated carbon adsorption tower can continue to be used to dry the activated carbon plate.

[0034] (2) The present invention provides a non-methane total hydrocarbon adsorption degradation device and method, which can sink the activated carbon plate into a cooling medium and use the temperature difference to cool it down after the activated carbon plate regeneration treatment is completed. 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 down efficiently, thereby reducing the time consumed by 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 is beneficial to the environmental protection needs of the oil refining industry;

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

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

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

[0038] In order to more clearly illustrate the embodiments of the present application 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 only some embodiments recorded in the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

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

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

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

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

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

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

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

[0046] Figure 8 The present invention is a flowchart of a non-methane total hydrocarbon adsorption degradation device.

[0047] Reference numerals:

[0048] 1. Activated carbon adsorption tower; 11. Tower body; 12. Air inlet; 13. Air outlet; 14. Support legs; 15. Bottom plate; 16. Wind rack; 17. Wind baffle; 2. External cooling assembly; 21. Cooling box; 22. Water inlet pipe; 23. Water outlet pipe; 24. Telescopic cylinder; 25. Placement rack; 251. Placement plate; 252. Short-circuit rod; 253. Air outlet; 254. Placement inlet; 26. Guide plate; 27. Limit plate; 3. Activated carbon plate; 4. Heating assembly; 41. Coil; 42. Three-way valve; 43. Short-circuit pipe; 44. Inlet pipe; 45. Air outlet terminal; 5. Load-bearing bar; 6. Telescopic rod; 7. Sealing plate; 8. Cold water tank; 9. Circulation pump. DETAILED DESCRIPTION

[0049] In view of the deficiencies in the prior art, the inventor of this case has proposed the technical solution of the present invention after long-term research and extensive practice. The following will further explain the technical solution, its implementation process and principle, etc. in conjunction with the drawings in the embodiments of this application and specific implementation cases.

[0050] It should be noted that the embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and cannot be understood as limiting the present invention. The described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments in the present invention, the present invention covers any substitution, modification, equivalent method and scheme made on the spirit, principle and scope of the present invention defined by the claims. All other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0051] In the description of the present application, "first", "second", "third" and similar words do not indicate any order, quantity or importance, but are only used to distinguish different components. Similarly, "one" or "an" and other similar words do not indicate a quantity limitation, but indicate the existence of at least one. "Include" or "comprise" and other similar words mean that the elements or objects appearing before "include" or "comprises" include the elements or objects listed after "include" or "comprises" and their equivalents, and do not exclude other elements or objects. "Connect" or "connected" and other similar words 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 terms "center", "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the drawings, and are 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 cannot be understood as a limitation on the present application. In addition, when positional terms such as both sides, outside, up and down are used, it should be understood that they are only used to facilitate understanding and description, considering that the structure may be facing other positions.

[0053] In the description of this application, unless otherwise clearly specified and limited, the technical or scientific terms used should have the usual meanings understood by persons with general skills in the field to which this application belongs. Terms such as "install", "connect", and "connect" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, a conflicting connection, or an integrated connection. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0054] The embodiments of the present invention are intended to introduce and illustrate the structural composition of the non-methane total hydrocarbon adsorption and degradation device and method and the coordination relationship between the various component structures. Unless otherwise specified, the dimensions, materials and manufacturing processes of the various components in the non-methane total hydrocarbon adsorption and degradation device and method in the embodiments of the present invention can be selected according to the specific circumstances and are not specifically limited or explained herein.

[0055] Further, in order to make the public have a better understanding of the present invention, some specific details are described in detail in the following detailed description of the present invention. For those skilled in the art, the present invention can be fully understood without the description of these details.

[0056] Example 1

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

[0058] Specifically, the activated carbon adsorption tower 1 includes four supporting legs 14 fixedly connected to the bottom thereof, and the bottoms of the four supporting 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 are then discharged through the air outlet end 13.

[0059] Specifically, two groups of placement racks 25 are arranged in the tower body 11, and each group of placement racks 25 includes two vertically arranged placement plates 251, four short-circuit rods 252 are fixedly connected between the two placement plates 251, and the two placement plates 251 are fixedly connected by the four short-circuit rods 252. A plurality of air vents 253 are opened through the placement plates 251, and the activated carbon plates 3 are fixedly connected to the placement plates 251, and the two vertically installed activated carbon plates 3 are opposite to each other.

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

[0061] Two inlets 254 are provided in both wind racks 16 , and the two vertical inlets 254 are connected to a placement rack 25 . Two sets of placement racks 25 are installed on the two wind racks 16 , and the placement plates 251 are arranged inside the inlets 254 at corresponding positions.

[0062] Two extraction ports are provided at the bottom of the tower body 11 for the placement racks 25 to be pulled out to the outside of the tower body 11. The top and bottom of each placement rack 25 are fixedly connected with a sealing plate 7. The sealing plate 7 at the bottom of the placement rack 25 can seal with the extraction port to seal the inside of the tower body 11. When the placement rack 25 needs to be pulled out with the activated carbon plate 3, the sealing plate 7 at the top of the placement rack 25 can seal with the extraction port to seal the inside of the tower body 11.

[0063] Specifically, four load-bearing bars 5 are slidably arranged on one of the wind racks 16, and each load-bearing bar 5 is correspondingly provided with two electric telescopic rods 6. The telescopic ends of the electric telescopic rods 6 are fixedly connected to the load-bearing bars 5, and the load-bearing bars 5 are fixedly connected to the wind rack 16. A load-bearing opening matched with the load-bearing bar 5 is opened in the short-circuit rod 252, and a load-bearing bar 5 is inserted into every 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 set inside it and the position can be fixed.

[0064] See also Figure 1 , Figure 2 , Figure 3 and Figure 4 , a non-methane total hydrocarbon adsorption degradation device, including an external cooling component 2.

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

[0066] Specifically, the water circulation channel includes an inlet pipe 22 and an outlet pipe 23 fixedly connected in the cooling box 21, the inlet pipe 22 and the outlet pipe 23, the inlet pipe 22 and the outlet pipe 23 are connected to a cold water tank 8, the inlet pipe 22 is fixedly connected to a circulation pump 9, the outlet pipe 23 is fixedly connected to a flow control valve, and the circulation flow direction of the cooling medium in the water circulation channel is: cold water tank 8 → circulation pump 9 → inlet pipe 22 → cooling space → 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, which is inclined toward the position of the outlet pipe 23. The water inside the cooling space will flow into the outlet pipe 23 by its own weight, and then flow into the cold water tank 8 through the outlet pipe 23.

[0067] Specifically, four telescopic cylinders 24 are fixedly connected to the bottom of the cooling box 21 , and the telescopic ends of every two telescopic cylinders 24 are commonly 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 bar 5 is arranged in the load-bearing opening, and the telescopic end of the telescopic cylinder 24 is in an extended state. When the regeneration of the activated carbon plate 3 is completed, the electric telescopic rod 6 is energized to extend its telescopic end, so that the load-bearing bar 5 is pulled out from the load-bearing opening. The telescopic cylinder 24 is started to shrink its telescopic end, so that the placement rack 25 moves into the cooling space, so that the activated carbon plate 3 sinks into the hot water for heat exchange, so that the activated carbon plate 3 is cooled.

[0069] It should be noted that when the telescopic end of the telescopic cylinder 24 contracts to the extreme position, the sealing plate 7 on 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 high-temperature waste heat from directly contacting the activated carbon plate 3, and helping to cool the activated carbon plate 3.

[0070] See also Figure 1 , Figure 2 , Figure 3 and Figure 4 , a non-methane total hydrocarbon adsorption degradation device, including a heating component 4.

[0071] Specifically, the heating component 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 every 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 guiding 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 pass waste heat gas to the coil 41 and 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 blocked 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 plate 7 and the placement rack 25 connected in sequence. At the same time, the load-bearing bar 5 is arranged in the load-bearing opening, and the telescopic end of the telescopic cylinder 24 is in an extended state, and the position of the placement rack 25 is positioned by the load-bearing bar 5.

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

[0081] The 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 of 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 for cooling treatment.

[0082] When a large amount of NMHC is attached to the activated carbon plate 3, it is necessary to spray water vapor to the activated carbon plate 3 through a nozzle through a steam regeneration device, and use its high temperature to desorb the NMHC on the activated carbon plate 3. The NMHC is discharged from the gas outlet 13 along with the steam, and is introduced into the corresponding NMHC processing equipment through a pipeline, thereby completing the regeneration of the activated carbon plate 3. After the regeneration is completed, the water vapor with NMHC in the tower body 11 has been emptied, and air with heat will remain in the tower body 11. At this time, the cooling device provided by the activated carbon adsorption tower 1 is used to cool the activated carbon adsorption tower 1 as a whole.

[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 rate 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, and 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. Under the premise that the cooling device cools down the activated carbon adsorption tower 1 as a whole, the inside 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 usually controlled at about 130°C, the temperature of the activated carbon plate 3 is about 105°C, and the temperature of the hot water is about 85°C. The temperature of the gas extracted by the exhaust pump will decrease as the cooling device cools down the activated carbon adsorption tower 1. When the temperature of the activated carbon adsorption tower 1 is cooled to about 50°C, the cooling device and the exhaust pump are turned off. It takes about 1 hour for the activated carbon adsorption tower 1 to cool down to the working temperature.

[0084] After the activated carbon plate 3 is regenerated, the telescopic end of the electric telescopic rod 6 is extended by energizing it, so that the load-bearing bar 5 is pulled out from the load-bearing opening, and the placement rack 25 is in a movable state. The telescopic cylinder 24 is started to shrink its telescopic end, so that the placement rack 25 moves into the cooling space, and the activated carbon plate 3 sinks 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] During the process of the activated carbon plate 3 being immersed in hot water for heat exchange, the flow rate of the flow control valve is adjusted, and the circulation pump 9 is turned on to start to introduce cold water into the cooling space, so that the water inlet speed of the water inlet pipe 22 is greater than the water outlet speed of the water outlet pipe 23, and the water body is further made to flow but not to the point that the water temperature inside the cooling space drops too fast due to the excessive flow rate, so that a temperature gradient is formed in the cooling space, and the heat of the activated carbon plate 3 is taken away by the flow of water, and the step-by-step cooling prevents the activated carbon plate 3 from cooling too fast, which is helpful for subsequent use. It should be noted that by taking the activated carbon plate 3 out of the activated carbon adsorption tower 1 and cooling the activated carbon plate 3 by circulating water to take away the heat of the activated carbon plate 3, the time required for the activated carbon plate 3 to cool down from about 105°C to about 20°C is reduced to 30 minutes. Compared with the prior art, there is no need to overcome the temperature generated during the regeneration of the activated carbon adsorption tower 1 first, and the activated carbon plate 3 can be directly heat-dissipated by taking it out to the outside, thereby improving the heat dissipation efficiency of the activated carbon plate 3.

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

[0087] The first solution is:

[0088] The telescopic cylinder 24 is started to extend its telescopic end, and the placement rack 25 and the activated carbon plate 3 are moved and reset, and reinstalled inside the activated carbon adsorption tower 1. The residual heat inside the activated carbon adsorption tower 1 is used to dry the moisture inside the activated carbon plate 3, and then the activated carbon plate 3 can be put into use.

[0089] The second solution is:

[0090] Close the circulation pump 9, stop the water from entering the cooling space, adjust the flow rate of the flow control valve to the maximum, so that the water in the cooling space flows into the cooling tank 8 along the water outlet pipe 23 by its own weight, and then the hot air leading to the coil 41 is converted to the short pipe 43 by the conversion of the three-way valve 42, and the hot air is transferred to the air outlet terminal 45 by the short pipe 43, and the hot air is sprayed toward the activated carbon plate 3 from the air outlet hole of the air outlet terminal 45 to dry the activated carbon plate 3. The gas in the cooling space will be discharged into the cooling tank 8 through the water 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 and reset, and reinstall them in the activated carbon adsorption tower 1, and then put them into use.

[0091] In summary, the first treatment scheme can directly put the activated carbon into the activated carbon adsorption tower 1 after cooling, and dry it with the help of the internal temperature of the activated carbon adsorption tower 1, without adding extra components to dry it, thereby reducing the drying cost of the activated carbon plate 3. The second treatment scheme, by emptying the cooling space and then drying it with air, is targeted to blow and dry the activated carbon plate 3 compared with the first scheme, and the time required for the activated carbon plate 3 to enter the working state is shorter, but the drying cost is increased.

[0092] It should be understood that the above embodiments are only for illustrating the technical concept and features of the present invention, and their purpose is to enable people familiar with this technology 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 limited to these descriptions. For ordinary technicians in the technical field to which the present invention belongs, some simple deductions or substitutions can be made without departing from the concept of the present invention. All 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 degradation device, comprising an activated carbon adsorption tower (1), wherein an activated carbon plate (3) is arranged in the activated carbon adsorption tower (1), characterized in that: The bottom of the activated carbon adsorption tower (1) is provided with an external cooling component (2), a heating component and a drying component for drying the activated carbon plate (3); the external cooling component (2) is provided with a cooling space for accommodating the activated carbon plate (3); the cooling space contains a cooling medium for the activated carbon plate (3) to sink; the cooling medium and the activated carbon plate (3) have a temperature difference; the cooling space is provided with a water circulation channel, and the water circulation channel can circulate the cooling medium; The heating component is capable of extracting waste heat gas from the activated carbon adsorption tower (1) 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.

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

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

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

5. The non-methane total hydrocarbon adsorption degradation device according to claim 1, characterized in that: The activated carbon adsorption tower (1) is vertically slidably provided with at least one set of placement racks (25), and the activated carbon plates (3) are mounted on the placement racks (25).

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

7. The method for adsorbing and degrading non-methane total hydrocarbons according to any one of claims 1 to 6, characterized in that: The following steps are involved: S1, introducing non-methane total hydrocarbon gas into the activated carbon adsorption tower (1); S2, 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).

Images