Active carbon hot nitrogen regeneration control system and regeneration method

Abstract

The application provides a kind of activated carbon hot nitrogen regeneration control system and regeneration method.System includes activated carbon reactor, nitrogen supply mechanism, circulating desorption mechanism and regenerative catalytic oxidation mechanism, activated carbon reactor is equipped with multiple independent reaction units, the reaction unit is used to install activated carbon to be desorbed.The activated carbon hot nitrogen regeneration control system with the above structure setting can adjust the number of actually used reaction units according to the number of activated carbon, and then adjust the flow and pressure of nitrogen correspondingly, so that it is adapted to the number of activated carbon to be desorbed, and the best efficiency is achieved.The nitrogen is heated by the circulating desorption mechanism to desorb the activated carbon, and after the concentration of organic waste gas reaches a certain value, it is sent to the regenerative catalytic oxidation mechanism for treatment.The regenerative catalytic oxidation mechanism can store a certain amount of heat, thereby relieving the process of heating and waiting for each desorption.

Description

Technical Field

[0001] This invention belongs to the field of activated carbon adsorption and regeneration technology, specifically relating to an activated carbon hot nitrogen regeneration control system and regeneration method. Background Technology

[0002] The main method for regenerating activated carbon is to set up a backup activated carbon adsorption bed and an online desorption system. By switching valves, the activated carbon bed is circulated for adsorption or desorption, thus achieving cyclic regeneration and addressing the problem of activated carbon losing its adsorption capacity due to saturation of active sites. However, current regeneration systems have long preparation cycles, requiring extended heating times, and their desorption efficiency is not ideal. Summary of the Invention

[0003] The present invention aims to at least solve one of the aforementioned technical problems existing in the prior art. To this end, the present invention provides an activated carbon thermal nitrogen regeneration control system that can adjust the desorption intensity according to actual desorption requirements, thereby ensuring desorption efficiency and shortening the heating process.

[0004] The present invention also provides a regeneration method using the above-described activated carbon thermal nitrogen regeneration control system.

[0005] According to a first aspect of the present invention, an activated carbon thermal nitrogen regeneration control system includes: an activated carbon reactor having multiple independent reaction units, each reaction unit having valves at its gas input and output ends for independent opening and closing control, the reaction units being used to hold activated carbon to be desorbed; a nitrogen supply mechanism for supplying nitrogen and being able to adjust the nitrogen output flow rate and pressure; a circulating desorption mechanism connected to the nitrogen supply mechanism and the activated carbon reactor for desorbing the activated carbon in the reaction units; and a regenerative catalytic oxidation mechanism connected to the circulating desorption mechanism for catalytically oxidizing the desorbed organic waste gas.

[0006] The activated carbon thermal nitrogen regeneration control system according to embodiments of the present invention has at least the following beneficial effects:

[0007] The activated carbon thermal nitrogen regeneration control system, with the aforementioned structure, can adjust the number of reaction units actually used based on the quantity of activated carbon, and then correspondingly adjust the nitrogen flow rate and pressure to match the amount of activated carbon requiring desorption, achieving optimal efficiency. The nitrogen is heated through a circulating desorption mechanism to desorb the activated carbon. Once the organic waste gas concentration reaches a certain value, it is sent to a regenerative catalytic oxidation mechanism for further treatment. The regenerative catalytic oxidation mechanism can retain a certain amount of heat, thus alleviating the need for a heating and waiting period after each desorption step.

[0008] According to some embodiments of the present invention, the reaction unit is provided with a first partition, a second partition, and a third partition arranged side by side. A mesh structure for desorption gas to pass through is provided between the first partition and the second partition, and between the second partition and the third partition. The second partition has an inlet at the upper end and an outlet at the lower end for the introduction and export of activated carbon. The gas input end and the gas output end of the reaction unit are respectively located in the first partition and the third partition.

[0009] According to some embodiments of the present invention, a plurality of support rods are provided between the two mesh structures, and a blind hole communicating with the first partition is provided at one end of the support rod near the first partition, and a plurality of air holes are provided on the sidewall of the blind hole.

[0010] According to some embodiments of the present invention, the nitrogen supply mechanism is equipped with a nitrogen generator.

[0011] According to some embodiments of the present invention, the cyclic desorption mechanism includes:

[0012] A circulation pipeline connects to the gas input and output terminals of the reaction unit;

[0013] A preheating device, connected to the nitrogen supply mechanism, is used to heat nitrogen to a first set temperature;

[0014] A heating device, connected to the preheating device and the circulation pipeline, is used to heat nitrogen to the desorption temperature and send it into the circulation pipeline.

[0015] According to some embodiments of the present invention, the preheating device includes:

[0016] A preheating channel, which is connected to the nitrogen supply mechanism;

[0017] Multiple heating modules are arranged at intervals along the length of the preheating channel within the preheating channel, and each heating module is provided with several heat-conducting parts that penetrate the preheating channel. Each heating module is provided with a control module, which is used to independently control the start-up, shutdown, and temperature adjustment of the heating module.

[0018] According to some embodiments of the present invention, the regenerative catalytic oxidation mechanism is provided with multiple catalytic oxidation reaction chambers connected in series, and each of the catalytic oxidation reaction chambers is provided with a regenerative ceramic.

[0019] According to some embodiments of the present invention, the catalytic oxidation reaction chamber is provided with a reaction zone and a combustion zone along its length, wherein the reaction zone is provided with a partition structure to form a plurality of reaction channels, the heat storage ceramic is disposed in the reaction channel, the reaction channel is also provided with a catalytic structure, and the input end of the catalytic oxidation reaction chamber is provided with a switching component for switching the corresponding reaction channel.

[0020] According to some embodiments of the present invention, the activated carbon thermal nitrogen regeneration control system further includes a mobile device vehicle body for integrating the activated carbon reactor, the nitrogen supply mechanism, the circulating desorption mechanism and the regenerative catalytic oxidation mechanism.

[0021] According to the regeneration method of the second aspect of the present invention, activated carbon is regenerated using the above-mentioned activated carbon thermal nitrogen regeneration control system. The output pressure and flow rate of the nitrogen supply mechanism are adjusted according to the number of reaction units in the activated carbon reactor. Oxygen is first discharged through the circulating desorption mechanism, and then desorption is performed. After the concentration of organic waste gas reaches the set value, it is sent to the regenerative catalytic oxidation mechanism for treatment and discharge.

[0022] Additional aspects and advantages of the invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description

[0023] The present invention will be further described below with reference to the accompanying drawings and embodiments, wherein:

[0024] Figure 1 This is a schematic diagram of an overall structure of the present invention;

[0025] Figure 2 This is a schematic diagram of an arrangement of the activated carbon thermal nitrogen regeneration control system in this invention;

[0026] Figure 3 A schematic diagram of a preheating device and a heating device in a circulating desorption mechanism;

[0027] Figure 4 This is a schematic diagram of a reaction unit structure;

[0028] Figure 5 This is a schematic diagram of a catalytic oxidation reaction chamber. Detailed Implementation

[0029] Embodiments of the present invention are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and should not be construed as limiting the present invention.

[0030] In the description of this invention, it should be understood that the orientation descriptions, such as up, down, etc., are based on the orientation or positional relationship shown in the drawings and are only for the convenience of describing this invention and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this invention.

[0031] In the description of this invention, "multiple" refers to two or more. The use of "first" and "second" is for distinguishing technical features only and should not be construed as indicating or implying relative importance, or implicitly indicating the number of indicated technical features or their sequential relationship.

[0032] In the description of this invention, unless otherwise explicitly defined, terms such as "set up," "install," and "connect" should be interpreted broadly, and those skilled in the art can reasonably determine the specific meaning of the above terms in this invention in conjunction with the specific content of the technical solution.

[0033] Reference Figures 1 to 5 As shown, an embodiment of the activated carbon thermal nitrogen regeneration control system of the present invention includes a mobile device body 100. An activated carbon reactor 400, a nitrogen supply mechanism, a circulating desorption mechanism 300, and a regenerative catalytic oxidation mechanism 500 are integrated into the compartment 101 of the mobile device body 100. In addition, the entire mobile device body 100 also includes a compartment 101 covering the activated carbon reactor 400, nitrogen supply mechanism, circulating desorption mechanism 300, and regenerative catalytic oxidation mechanism 500. The activated carbon reactor 400 has multiple independent reaction units. Each reaction unit has valves at its gas input and output ends for independent opening and closing control. The reaction unit is used to hold the activated carbon to be desorbed. Furthermore, external interfaces are reserved at both ends of the activated carbon reactor 400 to allow direct connection to the activated carbon bed via pipelines in practical applications, without introducing the activated carbon into the reaction unit. The nitrogen supply mechanism provides nitrogen and can adjust the nitrogen output flow rate and pressure. Specifically, the nitrogen supply system includes multiple nitrogen generators 200. The output flow rate and pressure can be adjusted by regulating the power of each nitrogen generator 200 or by starting and stopping multiple nitrogen generators 200. A circulating desorption system 300 connects the nitrogen supply system and the activated carbon reactor 400, and is used to desorb the activated carbon within the reaction unit. A regenerative catalytic oxidation system 500 connects to the circulating desorption system 300, and is used for the catalytic oxidation of the desorbed organic waste gas.

[0034] The activated carbon thermal nitrogen regeneration control system with the above-described structure can adjust the number of reaction units actually used based on the quantity of activated carbon, and then correspondingly adjust the nitrogen flow rate and pressure to match the amount of activated carbon to be desorbed, achieving optimal efficiency. The nitrogen is heated and desorbed from the activated carbon by the circulating desorption mechanism 300. Once the concentration of organic waste gas reaches a certain value, it is sent to the regenerative catalytic oxidation mechanism 500 for treatment. The regenerative catalytic oxidation mechanism 500 can retain a certain amount of heat, thereby alleviating the need for a heating and waiting process after each desorption.

[0035] In some embodiments of the present invention, the reaction unit is provided with a first partition 401, a second partition 402, and a third partition 403 arranged side by side. A mesh structure for the desorption gas to pass through is provided between the first partition 401 and the second partition 402, and between the second partition 402 and the third partition 403. The second partition 402 has an inlet 4021 at its upper end and an outlet 4022 at its lower end for the introduction and export of activated carbon. The gas input and gas output ends of the reaction unit are correspondingly located in the first partition 401 and the third partition 403. During operation, activated carbon is introduced into the second partition 402 through the inlet 4021 at its upper end. When the desorption operation is initiated, nitrogen enters the first partition 401 and quickly and evenly distributes within it, making full contact with the activated carbon and passing through the second partition 402 to exit into the third partition 403, thus rapidly desorbing the activated carbon within the second partition 402. The first and third partitions 401 and 403 are primarily for rapid and uniform gas flow, therefore their dimensions do not need to be excessively large to ensure the size of the second partition 402. The mesh structure mainly serves to confine the activated carbon, preventing it from entering the first and third partitions 401 and allowing nitrogen to pass through; therefore, its parameters can be flexibly set according to actual conditions. Furthermore, its structural composition is not limited to a single-layer mesh; it can be a multi-layer composite structure to simultaneously ensure strength and permeability.

[0036] In some embodiments of the present invention, a plurality of support rods 4011 are provided between the two mesh structures. One end of each support rod 4011 near the first partition layer 401 has a blind hole communicating with the first partition layer 401, and the sidewall of the blind hole has a plurality of vent holes. Using this structural configuration, the structural strength of the mesh structure can be improved by using the support rods 4011. Furthermore, by introducing nitrogen gas through the blind hole communicating with the first partition layer 401 and then discharging it through the vent holes, nitrogen gas can directly enter the internal region of the second partition layer 402 to desorb the activated carbon located in the middle, thereby improving efficiency.

[0037] In some embodiments of the present invention, the circulating desorption mechanism 300 includes a circulating pipeline, a preheating device, and a heating device 302. The circulating pipeline is connected to the gas input and output ends of the reaction unit for gas transport, realizing desorption circulation. Since the gas catalytic oxidation treatment is not performed immediately after high-temperature nitrogen is introduced into the reaction unit, but only after the organic waste gas reaches a certain concentration, the circulating pipeline effectively meets the requirements of the circulating operation. The preheating device is connected to the nitrogen supply mechanism and is used to heat the nitrogen to a first set temperature. The heating device 302 is connected to the preheating device and the circulating pipeline and is used to heat the nitrogen to the desorption temperature and send it into the circulating pipeline. It is understood that setting the first set temperature below the desorption temperature can increase the heating rate of the nitrogen, thereby improving the desorption efficiency.

[0038] In some embodiments of the present invention, the preheating device includes a preheating channel and heating modules 301. The preheating channel is connected to a nitrogen supply mechanism for supplying nitrogen. Multiple heating modules 301 are provided and spaced apart within the preheating channel along its length. Each heating module 301 has several heat-conducting parts that penetrate the preheating channel. Each heating module 301 is equipped with a control module for independently controlling the start / stop and temperature adjustment of the heating modules 301. During operation, the pressure and flow rate of nitrogen are determined based on the power of the nitrogen generator 200 or the number of modules started, and the number of heating modules 301 started is adjusted accordingly to complete the preheating of nitrogen. It is understood that the arrangement of the heating modules 301 ensures both efficiency and energy saving, reducing energy consumption.

[0039] In some embodiments of the present invention, the regenerative catalytic oxidation mechanism 500 is provided with multiple catalytic oxidation reaction chambers 501 connected in series, and each catalytic oxidation reaction chamber 501 is provided with a heat storage ceramic 503. The heat storage ceramic 503 can store a certain amount of heat to provide the initial temperature for each desorption gas treatment step, thereby improving efficiency.

[0040] Specifically, the catalytic oxidation reaction chamber 501 has a reaction zone 502 and a combustion zone 505 along its length. The reaction zone 502 has a partition structure to form multiple reaction channels. A heat storage ceramic 503 is disposed in the reaction channel, and a catalytic structure 504 is also disposed within the reaction channel. A switching component is provided at the input end of the catalytic oxidation reaction chamber 501 to switch the corresponding reaction channel. Multiple catalytic oxidation reaction chambers 501 are arranged horizontally side-by-side and connected by bent pipes. Using this structural configuration, organic waste gas can be repeatedly fed into different reaction channels to ensure the degree of catalytic oxidation. Furthermore, multiple reaction channels of the same catalytic oxidation reaction chamber 501 are connected to the same combustion zone 505, allowing for complete combustion in the combustion zone 505. Even if some organic waste gas is not completely catalytically decomposed, it can still be decomposed and burned using the subsequently connected catalytic oxidation reaction chamber 501.

[0041] It should be noted that the activated carbon hot nitrogen regeneration control system in this invention is also equipped with a corresponding fan to realize gas circulation or transportation, multiple valves to control the opening and closing of corresponding pipelines, multiple temperature detectors, pressure detectors, organic matter content detectors, etc., for judgment, and a control system to realize the automatic judgment of corresponding operations. All of these can be set up with reference to relevant existing technologies, and will not be described in detail here.

[0042] In addition, the present invention also proposes a regeneration method, which uses the above-mentioned activated carbon thermal nitrogen regeneration control system to regenerate activated carbon. First, the output pressure and flow rate of the nitrogen supply mechanism are adjusted according to the number of reaction units in the activated carbon reactor 400. Oxygen is discharged through the circulating desorption mechanism 300, and then desorption is carried out. After the concentration of organic waste gas reaches the set value, it is sent to the regenerative catalytic oxidation mechanism 500 for treatment and discharge.

[0043] The present invention has been described in detail above with reference to the embodiments. However, the present invention is not limited to the above embodiments. Within the scope of knowledge possessed by those skilled in the art, various changes can be made without departing from the spirit of the present invention.

Claims

1. A control system for the regeneration of activated carbon with thermal nitrogen, characterized in that, include: The activated carbon reactor is equipped with multiple independent reaction units. Each reaction unit has valves at its gas inlet and outlet to achieve independent opening and closing control. The reaction unit is used to hold the activated carbon to be desorbed, and the number of reaction units actually used is adjusted according to the amount of activated carbon. A nitrogen supply mechanism is used to supply nitrogen, and the output pressure and flow rate of the nitrogen supply mechanism are adjusted according to the number of reaction units in the activated carbon reactor. A circulating desorption mechanism is connected to the nitrogen supply mechanism and the activated carbon reactor, and is used to perform desorption operations on the activated carbon in the reaction unit. A regenerative catalytic oxidation mechanism, connected to the circulating desorption mechanism, is used for the catalytic oxidation of the desorbed organic waste gas; The regenerative catalytic oxidation mechanism is provided with multiple catalytic oxidation reaction chambers in series. Each catalytic oxidation reaction chamber is provided with a heat storage ceramic. The catalytic oxidation reaction chamber is provided with a reaction zone and a combustion zone along its length. The reaction zone is provided with a partition structure to form multiple reaction channels. The heat storage ceramic is provided in the reaction channel. The reaction channel is also provided with a catalytic structure. The input end of the catalytic oxidation reaction chamber is provided with a switching component for switching the corresponding reaction channel. The reaction unit is provided with a first partition, a second partition, and a third partition arranged side by side. A mesh structure is provided between the first partition and the second partition, and between the second partition and the third partition, for the desorption gas to pass through. The second partition has an inlet at the upper end and an outlet at the lower end for the introduction and export of activated carbon. The gas input end and the gas output end of the reaction unit are respectively located in the first partition and the third partition. Multiple support rods are provided between the two mesh structures. One end of each support rod near the first partition is provided with a blind hole that communicates with the first partition. The sidewall of the blind hole is provided with multiple air holes.

2. The activated carbon thermal nitrogen regeneration control system according to claim 1, characterized in that, The nitrogen supply mechanism is equipped with a nitrogen generator.

3. The activated carbon thermal nitrogen regeneration control system according to claim 1, characterized in that, The cyclic desorption mechanism includes: A circulation pipeline connects the gas input and output terminals of the reaction unit; A preheating device, connected to the nitrogen supply mechanism, is used to heat nitrogen to a first set temperature; A heating device, connected to the preheating device and the circulation pipeline, is used to heat nitrogen to the desorption temperature and send it into the circulation pipeline.

4. The activated carbon thermal nitrogen regeneration control system according to claim 3, characterized in that, The preheating device includes: A preheating channel, which is connected to the nitrogen supply mechanism; Multiple heating modules are arranged at intervals along the length of the preheating channel within the preheating channel, and each heating module is provided with several heat-conducting parts that penetrate the preheating channel. Each heating module is provided with a control module, which is used to independently control the start-up, shutdown, and temperature adjustment of the heating module.

5. The activated carbon thermal nitrogen regeneration control system according to any one of claims 1 to 4, characterized in that, The activated carbon thermal nitrogen regeneration control system also includes a mobile device vehicle body for integrating and mounting the activated carbon reactor, the nitrogen supply mechanism, the circulating desorption mechanism, and the regenerative catalytic oxidation mechanism.

6. A regeneration method applied to the activated carbon thermal nitrogen regeneration control system according to claim 1, characterized in that, Based on the number of reaction units in the activated carbon reactor, the output pressure and flow rate of the nitrogen supply mechanism are adjusted. Oxygen is first discharged through the circulating desorption mechanism, and then desorption is performed. Once the concentration of organic waste gas reaches the set value, it is sent to the regenerative catalytic oxidation mechanism for treatment and discharge.

Images