A regeneration system and method for a carbon-based catalyst

Abstract

The present invention belongs to the technical field of catalyst regeneration, and particularly relates to a regeneration system and method for a carbon-based catalyst. The system includes a mercury measurement device for the regeneration tower, a sulfur resource utilization device, and a mercury adsorption tower. The tower body of the regeneration tower sequentially includes a feeding section, a preparation section, a heating section, and an analysis section from top to bottom. Among them, a first gas outlet is provided in the preparation section, and a second gas outlet is provided in the analysis section. The first gas outlet is communicated with the mercury measurement device through a connecting pipeline, and the second gas outlet is sequentially communicated with the mercury adsorption tower and the mercury measurement device through a connecting pipeline. The mercury measurement device is communicated with the sulfur resource utilization device. The system of the present invention can complete the regeneration of the carbon-based catalyst, and at the same time can effectively separate mercury and gases such as SO2 in the analysis gas generated during the regeneration process, and respectively utilize the separated mercury and gases such as SO2 for resource utilization.

Description

Technical Field

[0001] The present invention relates to the technical field of catalyst regeneration, and particularly to a regeneration system and method for a carbon-based catalyst. Background Art

[0002] The carbon-based catalytic method for synergistic control of multiple flue gas pollutants can effectively remove various pollutants such as SOx, NOx, soot, and heavy metal mercury in flue gas, achieving up-to-standard discharge of flue gas. In the existing process flow, SOx is separated from the flue gas through the efficient "adsorption-regeneration" process of the carbon-based catalyst and discharged into the material recycling system for resource utilization. NOx is reduced to harmless substances such as nitrogen and water, and dust is sieved and collected by a screening device for utilization. SOx, NOx, and dust cannot be enriched in large quantities in the material recycling system and can also be effectively treated or utilized after being discharged from the process device. Thus, it can ensure that the carbon-based catalyst can be reused indefinitely in the flue gas pollutant co-treatment device. For heavy metal mercury and its main compounds, at a catalyst regeneration temperature of about 380 - 450 °C, they will also be desorbed and mixed with SO2, H2O, etc. generated during catalyst regeneration to form a desorbed gas (SRG), which is continuously discharged to the sulfur resource utilization device. Under this process, the mercury concentration in SRG is relatively low and cannot be effectively utilized during the sulfur resource utilization process. Moreover, the presence of mercury increases the pretreatment cost of SRG on the one hand, affecting the quality of sulfur products, and on the other hand, causing waste of mercury resources. Summary of the Invention

[0003] The object of the present invention is to address the problem in the prior art that during the regeneration of a carbon-based catalyst, the low-concentration mercury generated during regeneration is mixed with SO2, H2O, etc. to form a desorbed gas, which affects resource utilization due to the low mercury concentration. Thus, a regeneration system and method for a carbon-based catalyst are proposed. The system includes a regeneration tower, a mercury measurement device, an adsorption tower, and a sulfur resource utilization device. Desorbed gas outlets are respectively arranged in the preparation section and the desorption section of the regeneration tower. By adjusting the opening and closing states of the desorbed gas outlets in the preparation section and the desorption section, the flow direction of the desorbed gas is controlled, so that mercury in the desorbed gas is continuously condensed and enriched in the preparation section, and finally, the effective separation of mercury and gases such as SO2 in the desorbed gas is achieved. The system of the present invention can complete the regeneration of the carbon-based catalyst, and at the same time, can effectively separate mercury and gases such as SO2 in the desorbed gas generated during the regeneration process, and respectively utilize the separated mercury and gases such as SO2 for resource utilization.

[0004] To achieve the above object, a first aspect of the present invention provides a regeneration system for a carbon-based catalyst. The system includes a regeneration tower, a mercury detection device, a sulfur resource utilization device, and a mercury adsorption tower. The regeneration tower body sequentially includes a feeding section, a preparation section, a heating section, and a desorption section from top to bottom. Among them, a first gas outlet is provided on the side of the preparation section, and a second gas outlet is provided on the side of the desorption section. The first gas outlet is communicated with the mercury detection device through a connecting pipeline, and the second gas outlet is sequentially communicated with the mercury adsorption tower and the mercury detection device through a connecting pipeline. The mercury detection device is communicated with the sulfur resource utilization device.

[0005] Preferably, a first valve is provided on the connecting pipeline between the first gas outlet and the mercury detection device.

[0006] Preferably, a second valve is provided on the connecting pipeline between the second gas outlet and the mercury adsorption tower.

[0007] Preferably, the openings of the first gas outlet and the second gas outlet face upward.

[0008] Preferably, the vertical cross-sectional areas of the first gas outlet and the second gas outlet gradually decrease along the flowing direction of the desorbed gas.

[0009] Preferably, a cooling device is provided on the connecting pipeline between the second valve and the mercury adsorption tower.

[0010] Preferably, the regeneration system for the carbon-based catalyst further includes a waste liquid treatment device, and the cooling device is communicated with the waste liquid treatment device.

[0011] Preferably, a third valve is provided on the connecting pipeline between the cooling device and the mercury adsorption tower.

[0012] Preferably, a fourth valve is provided on the connecting pipeline between the mercury adsorption tower and the mercury detection device.

[0013] Preferably, a blower is provided on the connecting pipeline between the mercury detection device and the sulfur resource utilization device.

[0014] Preferably, the lower part of the regeneration tower further includes a cooling section and a discharging section which are sequentially arranged from top to bottom.

[0015] Preferably, the feeding section is provided with an air inlet for introducing a protective gas into the feeding section.

[0016] Preferably, the discharging section is provided with an air inlet for introducing a protective gas into the discharging section.

[0017] Preferably, the feeding section is further provided with a first flow regulating valve for controlling the flow rate of the protective gas entering the feeding section.

[0018] Preferably, a second flow regulating valve is further provided in the discharge section for controlling the flow rate of the protective gas entering the discharge section.

[0019] In a second aspect of the present invention, a method for regenerating a carbon-based catalyst is proposed. This method is implemented in the above-mentioned system, and the method includes the following steps:

[0020] S1. Open the first gas outlet, and at the same time close the second gas outlet. Transport the carbon-based catalyst saturated with adsorption to the feed section, and then the carbon-based catalyst saturated with adsorption sequentially passes through the preparation section, the heating section, and the desorption section for desorption. The desorption gas generated is subjected to mercury condensation and enrichment in the preparation section. The SO2-containing desorption gas with mercury removed enters the mercury measurement device through the first gas outlet to measure the mercury content, and then enters the sulfur resource utilization device for treatment;

[0021] S2. When the mercury content in the SO2-containing desorption gas in step S1 reaches a fixed value or meets the set value of the mercury content in the sulfur resource utilization device, close the first gas outlet, and at the same time open the second gas outlet. The carbon-based catalyst enriched with mercury in the preparation section sequentially passes through the heating section and the desorption section for desorption. The desorption gas enriched with mercury enters the mercury adsorption tower through the second gas outlet, and mercury is adsorbed in the mercury adsorption tower. The desorption gas after mercury adsorption and removal enters the mercury measurement device to measure the mercury content, and then enters the sulfur resource utilization device for treatment.

[0022] Preferably, in step S1, the carbon-based catalyst saturated with adsorption is obtained by the carbon-based catalyst adsorbing flue gas containing sulfur oxides, mercury, nitrogen oxides, water, and dust.

[0023] Preferably, the temperature in the preparation section is 150 - 250 °C.

[0024] Preferably, the temperature in the heating section is 380 - 450 °C.

[0025] Preferably, the temperature in the desorption section is 380 - 450 °C.

[0026] Preferably, before the desorption gas enriched with mercury enters the mercury adsorption tower in step S2, it is first passed through a cooling device for cooling; more preferably, the cooling temperature is 100 - 250 °C.

[0027] Preferably, in step S2, the cooling product obtained from the cooling device is treated in a waste liquid treatment device.

[0028] Preferably, in steps S1 and S2, the carbon-based catalyst after desorption enters the cooling section for cooling; more preferably, the carbon-based catalyst after cooling is discharged from the discharge section.

[0029] Through the above technical solutions, the present invention has at least the following beneficial effects:

[0030] (1) In the present invention, an outlet for the analytical gas is provided in the preparatory section of the regeneration tower to control the upward flow of the analytical gas, thereby continuously condensing and enriching mercury in the analytical gas in the preparatory section.

[0031] (2) In the present invention, a mercury detection device is provided in the system, and an outlet for the analytical gas is provided in the analytical section. By regulating the opening and closing states of the outlets for the analytical gas in the preparatory section and the analytical section, the flow direction of the analytical gas can be controlled. When the mercury is enriched to a certain concentration, the extraction of mercury from inside the regeneration tower to outside the regeneration tower can be completed without shutting down the system, thereby promoting the resource recovery of mercury and ultimately effectively separating mercury from gases such as SO2 in the analytical gas.

[0032] (3) In the present invention, the system can continuously enrich mercury in the regeneration tower without being affected by flue gas parameters. Description of the Drawings

[0033] Figure 1 is a schematic structural diagram of a regeneration system for a carbon-based catalyst according to the present invention.

[0034] Description of the Reference Numerals

[0035] 1. Regeneration tower; 2. Fan; 3. Sulfur resource utilization device; 4. Cooling device; 5. Mercury adsorption tower; 6. Waste liquid treatment device; 7. Mercury detection device; 11. Feed section; 12. Preparatory section; 13. Heating section; 14. Analytical section; 15. Cooling section; 16. Discharge section; 101. First outlet; 102. Second outlet; 103. Inlet; 104. Inlet; 105. First flow regulating valve; 106. Second flow regulating valve; 110. First valve; 120. Second valve; 121. Third valve; 122. Fourth valve. Detailed Embodiments

[0036] The following further details the specific embodiments of the present invention with reference to the accompanying drawings. It should be understood that the specific embodiments described herein are only for the purpose of illustrating and explaining the present invention and are not intended to limit the present invention.

[0037] In the ranges disclosed herein, the endpoints and any values are not limited to the exact ranges or values. These ranges or values should be understood to include values close to these ranges or values. For numerical ranges, between the endpoint values of each range, between the endpoint values of each range and individual point values, and individual point values can be combined with each other to obtain one or more new numerical ranges, and these numerical ranges should be regarded as specifically disclosed herein.

[0038] The first aspect of the present invention provides a regeneration system for a carbon-based catalyst, as Figure 1 shown. The system includes a regeneration tower 1, a mercury detection device 7, a sulfur resource utilization device 3, and a mercury adsorption tower 5. The tower body of the regeneration tower 1 successively includes a feeding section 11, a preparation section 12, a heating section 13, and an analysis section 14 from top to bottom. Among them, a first air outlet 101 is provided on the side of the preparation section 12, and a second air outlet 102 is provided on the side of the analysis section 14. The first air outlet 101 is communicated with the mercury detection device 7 through a connecting pipe, and the second air outlet 102 is successively communicated with the mercury adsorption tower 5 and the mercury detection device 7 through connecting pipes, and the mercury detection device 7 is communicated with the sulfur resource utilization device 3.

[0039] In the system of the present invention, in a specific embodiment, the regeneration tower 1 can be a conventional choice in the art. The feeding section 11 is used for the feeding distribution of the carbon-based catalyst in the regeneration tower 1. The preparation section 12 preheats the catalyst from the feeding section 11. The heating section 13 and the analysis section 14 heat up the catalyst from the preparation section 12, and then regenerate and analyze the catalyst.

[0040] In the system of the present invention, in order to better discharge the catalyst after regeneration and analysis, in a specific embodiment, the lower part of the regeneration tower 1 further includes a cooling section 15 and a discharging section 16 arranged successively from top to bottom. More specifically, the cooling section 15 is used to cool the carbon-based catalyst after regeneration and analysis in the analysis section 14, and the discharging section 16 is used to control the uniform discharging of the carbon-based catalyst after regeneration and cooling.

[0041] In the system of the present invention, the structures of each section in the regeneration tower 1 are as follows: the feeding section 11 and the discharging section 16 are hollow shells; the upper parts of the preparation section 12 and the analysis section 14 are tube row structures, and the lower parts are hollow shells, and the tube row length is generally 0.2 - 0.5 m; the heating section 13 and the cooling section 15 adopt shell-and-tube heat exchanger structures.

[0042] In the method of the present invention, in a specific embodiment, the position of the first air outlet 101 should be higher than the height of the carbon-based catalyst layer in the preparation section 12, and the position of the second air outlet 102 should be higher than the height of the carbon-based catalyst layer in the desorption section 14. In a preferred embodiment, the first air outlet 101 is located in the upper part of the preparation section 12. Specifically, the first air outlet 101 is located in the tube row structure in the preparation section 12 and is 0.05 - 0.2 m away from the lower end of the tube row structure. For example, it can be 0.05 m, 0.1 m, 0.15 m or 0.2 m. The second air outlet 102 is located in the upper part of the desorption section 14. Specifically, the second air outlet 102 is located in the tube row structure in the desorption section 14 and is 0.05 - 0.2 m away from the lower end of the tube row structure. For example, it can be 0.05 m, 0.1 m, 0.15 m or 0.2 m.

[0043] In the system of the present invention, in order to reduce the flow rate of the desorbed gas before entering the pipeline and reduce the entrainment of catalyst particles and fine powders by the gas flow, and at the same time prevent problems such as the retention and agglomeration of catalyst particles and fine powders on the wall surface, in a specific embodiment, the vertical cross-sectional areas of the first air outlet 101 and the second air outlet 102 gradually decrease along the desorbed gas flow direction. Specifically, both the first air outlet 101 and the second air outlet 102 adopt a tapered form. In a preferred case, the bottom surface inclination angles of the first air outlet 101 and the second air outlet 102 are relatively large. In this article, the "bottom surface inclination angle" refers to the angle between the inclined side of the air outlet and the horizontal plane. In a more preferred embodiment, the bottom surface inclination angles of the first air outlet 101 and the second air outlet 102 are 45 - 60 ° , such as 45 ° , 50 ° , 55 ° or 60 ° . In order to further reduce the entrainment of catalyst particles and powders by the gas flow in the pipeline, in a further preferred embodiment, the opening directions of the first air outlet 101 and the second air outlet 102 are upward.

[0044] In the system of the present invention, in a specific embodiment, the mercury measurement device 7 is a conventional choice in the art and is used to measure the mercury content in the desorbed gas generated during the regeneration of the catalyst. In a preferred embodiment, the mercury measurement device 7 is a continuous gas online mercury measurement device.

[0045] In the system of the present invention, in a specific embodiment, the mercury adsorption tower 5 is used to adsorb and remove mercury in the desorbed gas, which can be a conventional choice in the art. In a preferred embodiment, the adsorption material used in the mercury adsorption tower 5 can be the same carbon-based catalyst as that in the regeneration tower 1. In a preferred case, an adsorbent specifically for adsorbing mercury and its compounds can be adopted, such as sulfur-loaded activated carbon, metal oxide, or precious metal-supported adsorbent, etc. Specifically, it can be preferred according to the convenience of implementation. If the same carbon-based catalyst as that in the regeneration tower 1 is selected, the filling capacity of the adsorption tower 5 should not be less than the volume of the carbon-based catalyst in the preparation section 12. Preferably, it can be an integer multiple slightly larger than the volume of the carbon-based catalyst in the preparation section 12, such as 1, 2, 3, or 4. Correspondingly, the replacement frequency of the adsorption material in the adsorption tower 5 can be the reciprocal of the multiple, such as 1, 1 / 2, 1 / 3, or 1 / 4.

[0046] In the system of the present invention, in order to better control the opening and closing states of the first gas outlet 101 and the second gas outlet 102, in a specific embodiment, a first valve 110 is provided on the connecting pipe between the first gas outlet 101 and the mercury detection device 7, and a second valve 120 is provided on the connecting pipe between the second gas outlet 102 and the mercury adsorption tower 5.

[0047] In the system of the present invention, in a specific embodiment, the first valve 110 and the second valve 120 are ball valves. In a specific implementation process, since the desorbed gas has a high dust content, in order to prevent valve jamming and achieve smooth regulation of the desorbed gas flow rate, in a preferred embodiment, the first valve 110 and the second valve 120 are V-type ball valves.

[0048] In the system of the present invention, in a specific embodiment, the sulfur resource utilization device 3 is a conventional choice in the art and is used for resource utilization treatment of sulfides in the desorbed gas generated during the catalyst regeneration process. In a preferred embodiment, the sulfur resource utilization device 3 is a sodium metabisulfite production device, wherein the set value of the sulfur resource utilization device 3 regarding the mercury content is 0 - 0.03 mg / m 3 , such as 0.02 mg / m 3 , 0.025 mg / m 3 or 0.03 mg / m 3 .

[0049] In the system of the present invention, in order to reduce the temperature of the desorbed gas and make the desorbed gas entering the mercury adsorption tower 5 meet the intake parameter requirements. Specifically, the intake parameter requirements are determined according to the adsorption material in the mercury adsorption tower 5. For example, when the adsorption material in the mercury adsorption tower 5 is the same carbon-based catalyst as that in the regeneration tower 1, the intake temperature in the mercury adsorption tower 5 ≤ 250 °C. In a specific embodiment, a cooling device 4 is provided on the connecting pipeline between the second valve 120 and the mercury adsorption tower 5. In a specific implementation process, the second valve 120 is opened, the first valve 110 is closed, and the desorbed gas generated in the regeneration tower 1 enters the cooling device 4 from the second outlet 102, and the desorbed gas is cooled and cleaned in the cooling device 4, and condensed water, dust and other substances generated by cooling are collected. The desorbed gas after cooling and cleaning continues to be introduced into the mercury adsorption tower 5.

[0050] In the system of the present invention, in a specific embodiment, the cooling device 4 can be a conventional selection in the art, as long as it can make the desorbed gas parameters meet the intake conditions in the mercury adsorption tower 5. For example, the cooling device 4 can be a gas scrubbing device.

[0051] In the system of the present invention, in a preferred embodiment, the regeneration system of the carbon-based catalyst further includes a waste liquid treatment device 6, and the cooling device 4 is communicated with the waste liquid treatment device 6. In a specific implementation process, the condensate and other sediments collected in the cooling device 4 are treated in the waste liquid treatment device 6.

[0052] In the system of the present invention, in order to ensure the maintenance operation safety of the cooling device 4 and the mercury adsorption tower 5, the inlet of the mercury adsorption tower 5 is shut off and controlled. In a specific embodiment, a third valve 121 is provided on the connecting pipeline between the cooling device 4 and the mercury adsorption tower 5.

[0053] In the system of the present invention, in order to ensure the maintenance operation safety of the mercury adsorption tower 5, the outlet of the mercury adsorption tower 5 is shut off and controlled. In a specific embodiment, a fourth valve 122 is provided on the connecting pipeline between the mercury adsorption tower 5 and the mercury measurement device 7.

[0054] In the system of the present invention, in a specific embodiment, the third valve 121 and the fourth valve 122 can be conventional selections in the art.

[0055] In the system of the present invention, in order to extract the desorbed gas generated in the regeneration tower 1, in a specific embodiment, a fan 2 is provided on the connecting pipeline between the mercury measurement device 7 and the sulfur resource utilization device 3. The fan 2 can be a conventional selection in the art. In a preferred embodiment, the fan 2 is a high-temperature resistant SO2 fan.

[0056] In the system of the present invention, in order to make the regeneration and desorption process of the carbon-based catalyst safer and to control the flow direction of the final desorbed gas through air pressure control. In the specific implementation, the feeding section 11 is provided with an air inlet 103 for introducing a protective gas into the feeding section 11. The protective gas serves as the protective gas and carrier gas during the catalyst regeneration process, which can prevent leakage and corrosion problems caused by the upward flow of the desorbed gas; the discharging section 16 is provided with an air inlet 104 for introducing a protective gas into the discharging section 16. The protective gas serves as the protective gas during the catalyst cooling process or the carrier gas during the regeneration process. In a specific case, the protective gas can be nitrogen or purified flue gas with a low oxygen concentration. In a preferred case, the protective gas is nitrogen. During the specific implementation process, the protective gas is introduced into the feeding section 11 and the discharging section 16 respectively. When the system is in the normal operation mode, the first gas outlet 101 is opened and the second gas outlet 102 is closed. At this time, the upper gas flows downward and the lower gas flows upward, and the desorbed gas generated after desorption in the desorption section 14 is discharged from the first gas outlet 101 out of the regeneration tower 1. When the system is in the mercury removal mode, the second gas outlet 102 is opened and the first gas outlet 101 is closed. At this time, the upper gas flows downward and the lower gas flows upward, and the desorbed gas generated after desorption in the desorption section 14 is discharged from the second gas outlet 102 out of the regeneration tower 1.

[0057] In the system of the present invention, during the specific operation process, the fan 2 controls the gas pressure and the desorbed gas flow rate in the regeneration tower 1 by coordinating the opening degrees of the first valve 110 and the second valve 120, and by coordinating the intake parameters of the protective gas in the regeneration tower 1. In a specific case, the intake pressure of the protective gas should be controlled below 10 kPa. In a preferred case, the intake pressure of the protective gas is 5 - 8 kPa, such as 5 kPa, 5.5 kPa, 6 kPa, 6.5 kPa, 7 kPa, 7.5 kPa or 8 kPa.

[0058] In the system of the present invention, in order to control the flow rate of the protective gas entering the regeneration tower 1, in the specific implementation, the feeding section 11 is further provided with a first flow regulating valve 105, and the discharging section 16 is further provided with a second flow regulating valve 106. In a specific case, the flow rate of the protective gas entering the regeneration tower 1 is determined by the scale of the regeneration tower, as long as the SO2 concentration in the desorbed gas is about 15%.

[0059] In the system of the present invention, during the specific implementation process, when the system is in the normal operation mode, the first valve 110 is opened, the second valve 120 is closed, and protective gas is introduced into the regeneration tower 1 through the air inlet 103 and the air inlet 104 respectively, and the first flow regulating valve 105 and the second flow regulating valve 106 are used to control the flow rate of the protective gas entering the regeneration tower 1. The carbon-based catalyst saturated with adsorption is transported to the feeding section 11 and the distribution process of the carbon-based catalyst is completed, so that the carbon-based catalyst continues to flow downward evenly, and then is preheated at the preparation section 12, and finally is heated and desorbed in the heating section 13 and the desorption section 14 to complete the regeneration process of the carbon-based catalyst. The desorbed gas generated by heating and desorption flows upward to reach the preparation section 12. Since the temperature of the preparation section 12 is lower than that in the heating section 13 and the desorption section 14, the mercury vapor in the desorbed gas is condensed at the preparation section 12 and is re-enriched on the carbon-based catalyst in the preparation section 12. The remaining desorbed gas enriched with SO2 enters the mercury detection device 7 from the first air outlet 101 through the fan 2, the mercury content in the desorbed gas is measured, and the sulfur in the desorbed gas is utilized for sulfur resource recovery in the sulfur resource recovery device 3. When the measured mercury content in the desorbed gas reaches a fixed value or meets the set value of the mercury content in the sulfur resource recovery device 3, the system stops the normal operation mode and starts the mercury removal mode. In this article, the "fixed value" refers to "the measured value of the mercury content in the desorbed gas no longer increases", and the set value of the mercury content in the sulfur resource recovery device 3 generally refers to "the mercury concentration value allowed in the inlet gas of the sulfur resource recovery device".

[0060] In the system of the present invention, during the specific implementation process, when the system is in the mercury removal mode, the second valve 120 is opened, the first valve 110 is closed, and the carbon-based catalyst enriched with mercury in the preparation section 12 is heated and desorbed in the heating section 13 and the desorption section 14 to complete the regeneration process of the carbon-based catalyst. The desorbed gas enriched with mercury generated by heating and desorption enters the mercury adsorption tower 5 from the second air outlet 102, the mercury in the desorbed gas is adsorbed and removed, and the mercury content of the desorbed gas after mercury removal is measured in the mercury detection device 7, and then the desorbed gas is subjected to sulfur resource treatment in the sulfur resource recovery device 3.

[0061] According to the carbon-based catalyst regeneration system of the present invention, in the first specific implementation manner, the system includes a regeneration tower 1. The tower body of the regeneration tower 1 sequentially includes a feeding section 11, a preparation section 12, a heating section 13 and a desorption section 14 from top to bottom. Among them, a first air outlet 101 is provided in the preparation section 12, and a mercury detection device 7 and a sulfur resource recovery device 3 are sequentially arranged on the connecting pipe of the first air outlet 101 along the gas flow direction; a second air outlet 102 is provided in the desorption section 14, and a mercury adsorption tower 5 is arranged on the connecting pipe of the second air outlet 102 and the mercury detection device 7.

[0062] According to the regeneration system of the carbon-based catalyst of the present invention, in the second specific embodiment, the system includes a regeneration tower 1. The tower body of the regeneration tower 1 sequentially includes a feeding section 11, a preparation section 12, a heating section 13, and an analysis section 14 from top to bottom. Among them, a first air outlet 101 is provided in the preparation section 12. A mercury detection device 7 and a sulfur resource utilization device 3 are sequentially arranged on the connecting pipeline of the first air outlet 101 along the air flow direction; a second air outlet 102 is provided in the analysis section 14, and a mercury adsorption tower 5 is arranged on the connecting pipeline of the second air outlet 102 and the mercury detection device 7; a first valve 110 is arranged on the connecting pipeline of the first air outlet 101 and the mercury detection device 7, and a second valve 120 is arranged on the connecting pipeline of the second air outlet 102 and the mercury adsorption tower 5.

[0063] According to the regeneration system of the carbon-based catalyst of the present invention, in the third specific embodiment, the system includes a regeneration tower 1. The tower body of the regeneration tower 1 sequentially includes a feeding section 11, a preparation section 12, a heating section 13, and an analysis section 14 from top to bottom. Among them, a first air outlet 101 is provided in the preparation section 12. A mercury detection device 7 and a sulfur resource utilization device 3 are sequentially arranged on the connecting pipeline of the first air outlet 101 along the air flow direction; a second air outlet 102 is provided in the analysis section 14, and a mercury adsorption tower 5 is arranged on the connecting pipeline of the second air outlet 102 and the mercury detection device 7; a first valve 110 is arranged on the connecting pipeline of the first air outlet 101 and the mercury detection device 7, and a second valve 120 is arranged on the connecting pipeline of the second air outlet 102 and the mercury adsorption tower 5; a cooling device 4 is arranged on the connecting pipeline of the second valve 120 and the mercury adsorption tower 5. The regeneration system of the carbon-based catalyst further includes a waste liquid treatment device 6, and the cooling device 4 is communicated with the waste liquid treatment device 6.

[0064] According to the regeneration system of the carbon-based catalyst of the present invention, in the fourth specific embodiment, the system includes a regeneration tower 1. The tower body of the regeneration tower 1 sequentially includes a feeding section 11, a preparation section 12, a heating section 13, and an analysis section 14 from top to bottom. Among them, the preparation section 12 is provided with a first air outlet 101. Along the gas flow direction, a mercury detection device 7 and a sulfur resource utilization device 3 are sequentially arranged on the connection pipeline of the first air outlet 101; the analysis section 14 is provided with a second air outlet 102, and a mercury adsorption tower 5 is arranged on the connection pipeline between the second air outlet 102 and the mercury detection device 7; a first valve 110 is arranged on the connection pipeline between the first air outlet 101 and the mercury detection device 7, and a second valve 120 is arranged on the connection pipeline between the second air outlet 102 and the mercury adsorption tower 5; a cooling device 4 is arranged on the connection pipeline between the second valve 120 and the mercury adsorption tower 5. The regeneration system of the carbon-based catalyst further includes a waste liquid treatment device 6, and the cooling device 4 is communicated with the waste liquid treatment device 6; a third valve 121 is arranged on the connection pipeline between the cooling device 4 and the mercury adsorption tower 5, and a fourth valve 122 is arranged on the connection pipeline between the mercury adsorption tower 5 and the mercury detection device 7.

[0065] According to the regeneration system of the carbon-based catalyst of the present invention, in the fifth specific embodiment, the system includes a regeneration tower 1. The tower body of the regeneration tower 1 sequentially includes a feeding section 11, a preparation section 12, a heating section 13, and an analysis section 14 from top to bottom. Among them, the preparation section 12 is provided with a first air outlet 101. Along the gas flow direction, a mercury detection device 7 and a sulfur resource utilization device 3 are sequentially arranged on the connection pipeline of the first air outlet 101; the analysis section 14 is provided with a second air outlet 102, and a mercury adsorption tower 5 is arranged on the connection pipeline between the second air outlet 102 and the mercury detection device 7; a first valve 110 is arranged on the connection pipeline between the first air outlet 101 and the mercury detection device 7, and a second valve 120 is arranged on the connection pipeline between the second air outlet 102 and the mercury adsorption tower 5; a cooling device 4 is arranged on the connection pipeline between the second valve 120 and the mercury adsorption tower 5. The regeneration system of the carbon-based catalyst further includes a waste liquid treatment device 6, and the cooling device 4 is communicated with the waste liquid treatment device 6; a third valve 121 is arranged on the connection pipeline between the cooling device 4 and the mercury adsorption tower 5, and a fourth valve 122 is arranged on the connection pipeline between the mercury adsorption tower 5 and the mercury detection device 7; a blower 2 is arranged on the connection pipeline between the mercury detection device 7 and the sulfur resource utilization device 3.

[0066] According to the regeneration system of the carbon-based catalyst of the present invention, in the sixth specific embodiment, the system includes a regeneration tower 1. The tower body of the regeneration tower 1 sequentially includes a feeding section 11, a preparation section 12, a heating section 13, and an analysis section 14 from top to bottom. Among them, a first air outlet 101 is provided in the preparation section 12. Along the gas flow direction, a mercury detection device 7 and a sulfur resource utilization device 3 are sequentially arranged on the connection pipeline of the first air outlet 101; a second air outlet 102 is provided in the analysis section 14, and a mercury adsorption tower 5 is arranged on the connection pipeline of the second air outlet 102 and the mercury detection device 7; a first valve 110 is arranged on the connection pipeline of the first air outlet 101 and the mercury detection device 7, and a second valve 120 is arranged on the connection pipeline of the second air outlet 102 and the mercury adsorption tower 5; a cooling device 4 is arranged on the connection pipeline of the second valve 120 and the mercury adsorption tower 5. The regeneration system of the carbon-based catalyst further includes a waste liquid treatment device 6, and the cooling device 4 is communicated with the waste liquid treatment device 6; a third valve 121 is arranged on the connection pipeline of the cooling device 4 and the mercury adsorption tower 5, and a fourth valve 122 is arranged on the connection pipeline of the mercury adsorption tower 5 and the mercury detection device 7; a fan 2 is arranged on the connection pipeline of the mercury detection device 7 and the sulfur resource utilization device 3; the lower part of the regeneration tower 1 further includes a cooling section 15 and a discharging section 16 arranged sequentially from top to bottom.

[0067] According to the regeneration system of the carbon-based catalyst of the present invention, in the seventh specific embodiment, the system includes a regeneration tower 1. The tower body of the regeneration tower 1 successively includes a feeding section 11, a preparation section 12, a heating section 13, and an analysis section 14 from top to bottom. Among them, a first air outlet 101 is provided in the preparation section 12, and a mercury detection device 7 and a sulfur resource utilization device 3 are successively arranged on the connecting pipeline of the first air outlet 101 along the air flow direction; a second air outlet 102 is provided in the analysis section 14, and a mercury adsorption tower 5 is arranged on the connecting pipeline of the second air outlet 102 and the mercury detection device 7; a first valve 110 is arranged on the connecting pipeline of the first air outlet 101 and the mercury detection device 7, and a second valve 120 is arranged on the connecting pipeline of the second air outlet 102 and the mercury adsorption tower 5; a cooling device 4 is arranged on the connecting pipeline of the second valve 120 and the mercury adsorption tower 5. The regeneration system of the carbon-based catalyst further includes a waste liquid treatment device 6, and the cooling device 4 is communicated with the waste liquid treatment device 6; a third valve 121 is arranged on the connecting pipeline of the cooling device 4 and the mercury adsorption tower 5, and a fourth valve 122 is arranged on the connecting pipeline of the mercury adsorption tower 5 and the mercury detection device 7; a blower 2 is arranged on the connecting pipeline of the mercury detection device 7 and the sulfur resource utilization device 3; the lower part of the regeneration tower 1 further includes a cooling section 15 and a discharging section 16 arranged successively from top to bottom; the feeding section 11 is provided with an air inlet 103 for introducing a protective gas into the feeding section 11, and the discharging section 16 is provided with an air inlet 104 for introducing a protective gas into the discharging section 16.

[0068] According to the regeneration system of the carbon-based catalyst of the present invention, in the eighth specific embodiment, the system includes a regeneration tower 1. The tower body of the regeneration tower 1 sequentially includes a feeding section 11, a preparation section 12, a heating section 13, and an analysis section 14 from top to bottom. Among them, a first air outlet 101 is provided in the preparation section 12, and a mercury detection device 7 and a sulfur resource utilization device 3 are sequentially arranged on the connecting pipeline of the first air outlet 101 along the air flow direction; a second air outlet 102 is provided in the analysis section 14, and a mercury adsorption tower 5 is arranged on the connecting pipeline of the second air outlet 102 and the mercury detection device 7; a first valve 110 is arranged on the connecting pipeline of the first air outlet 101 and the mercury detection device 7, and a second valve 120 is arranged on the connecting pipeline of the second air outlet 102 and the mercury adsorption tower 5; a cooling device 4 is arranged on the connecting pipeline of the second valve 120 and the mercury adsorption tower 5. The regeneration system of the carbon-based catalyst further includes a waste liquid treatment device 6, and the cooling device 4 is communicated with the waste liquid treatment device 6; a third valve 121 is arranged on the connecting pipeline of the cooling device 4 and the mercury adsorption tower 5, and a fourth valve 122 is arranged on the connecting pipeline of the mercury adsorption tower 5 and the mercury detection device 7; a blower 2 is arranged on the connecting pipeline of the mercury detection device 7 and the sulfur resource utilization device 3; the lower part of the regeneration tower 1 further includes a cooling section 15 and a discharging section 16 arranged sequentially from top to bottom; an air inlet 103 is provided in the feeding section 11 for introducing a protective gas into the feeding section 11, and an air inlet 104 is provided in the discharging section 16 for introducing a protective gas into the discharging section 16; a first flow regulating valve 105 is further arranged in the feeding section 11 for controlling the flow rate of the protective gas entering the feeding section 11, and a second flow regulating valve 106 is further arranged in the discharging section 16 for controlling the flow rate of the protective gas entering the discharging section 16.

[0069] In the second aspect of the present invention, a regeneration method of a carbon-based catalyst is proposed. This method is implemented in the above-mentioned system, and the method includes the following steps:

[0070] (1) Open the first air outlet 101 and close the second air outlet 102 at the same time. Convey the adsorption-saturated carbon-based catalyst to the feeding section 11, and then the adsorption-saturated carbon-based catalyst sequentially passes through the preparation section 12, the heating section 13, and the analysis section 14 for analysis. The generated analysis gas is subjected to mercury condensation enrichment in the preparation section 12. The SO2-containing analysis gas from which mercury has been removed enters the mercury detection device 7 through the first air outlet 101 to measure the mercury content, and then enters the sulfur resource utilization device 3 for treatment;

[0071] (2)When the mercury content in the SO2-containing desorbed gas in step S1 reaches a fixed value or meets the set value of the mercury content in the sulfur resource utilization device 3, the first air outlet 101 is closed, and at the same time, the second air outlet 102 is opened. The carbon-based catalyst enriched with mercury in the preparation section 12 is sequentially desorbed through the heating section 13 and the desorption section 14. The desorbed gas enriched with mercury enters the mercury adsorption tower 5 through the second air outlet 102, and mercury is adsorbed in the mercury adsorption tower 5. The desorbed gas after mercury adsorption and removal enters the mercury measuring device 7 to measure the mercury content, and then enters the sulfur resource utilization device 3 for treatment.

[0072] In the method of the present invention, in a specific embodiment, in step S1, the carbon-based catalyst saturated with adsorption is the carbon-based catalyst saturated with adsorption discharged from the adsorption unit in the flue gas purification device. Specifically, the carbon-based catalyst saturated with adsorption is obtained by the carbon-based catalyst adsorbing flue gas containing sulfur oxides, mercury, nitrogen oxides, water, dust, etc.

[0073] In the method of the present invention, in a specific embodiment, in step S1, the flow rate of the carbon-based catalyst saturated with adsorption entering the feeding section 11 is determined by the removal load of the entire flue gas purification device and is affected by the flue gas parameters of the production main system. Generally, it is a stable value. In a preferred embodiment, when the carbon-based catalyst saturated with adsorption reaches a certain bed height in the feeding section 11, it forms a sealing effect on the desorbed gas in the tower, thereby reducing the upward leakage amount of the desorbed gas. Specifically, the bed height is 0.5 - 2.0 m, and for example, it can be 0.5 m, 1 m, 1.5 m, or 2 m.

[0074] In the method of the present invention, in a specific embodiment, the temperature in the preparation section 12 ≤ 250 °C. In a preferred embodiment, the temperature in the preparation section 12 is 120 - 250 °C, for example, 120 °C, 150 °C, 180 °C, 210 °C, or 250 °C.

[0075] In the method of the present invention, in a specific embodiment, the temperature of the outlet catalyst in the heating section 13 is 380 - 450 °C, and for example, it can be 380 °C, 390 °C, 400 °C, 410 °C, 420 °C, 430 °C, 440 °C, or 450 °C.

[0076] In the method of the present invention, in a specific embodiment, the temperature in the desorption section 14 is 380 - 450 °C, and for example, it can be 380 °C, 390 °C, 400 °C, 410 °C, 420 °C, 430 °C, 440 °C, or 450 °C.

[0077] In the method of the present invention, in steps S1 and S2, during the specific operation process, since the temperature of the material layer gradually increases from the preparation section 12 to the analysis section 14, the desorption effect of various pollutants adsorbed by the carbon-based catalyst will continuously enhance and it is difficult to be adsorbed by the material layer again. The carbon-based catalyst can still maintain a good regeneration effect.

[0078] In the method of the present invention, on the one hand, in order to prevent mercury and its compounds from entering the sulfur resource utilization device 3 and affecting the quality of sulfur products, and on the other hand, the enrichment and concentration of mercury and its compounds in the regeneration tower 1 are realized, creating conditions for the resource recovery and utilization of mercury and its compounds. Therefore, step S1 of the present invention is implemented.

[0079] In the method of the present invention, during the specific operation process, in step S1, when in the normal operation mode, the first air outlet 101 is opened, and at the same time the second air outlet 102 is closed. The carbon-based catalyst saturated with adsorption is transported to the feeding section 11, and then the carbon-based catalyst saturated with adsorption sequentially passes through the preparation section 12, the heating section 13 and the analysis section 14 for regeneration and desorption. Since the opened air outlet position in the system is the first air outlet 101, the desorption gas generated by the regeneration and desorption flows upward to the preparation section 12. Since the temperature in the preparation section 12 is relatively low, the mercury and its compounds in the desorption gas are condensed in the preparation section 12 and are re-adsorbed on the carbon-based catalyst in the preparation section 12. As the operation time increases, the mercury and its compounds are continuously enriched in the preparation section 12. The SO2-containing desorption gas after mercury removal enters the mercury measurement device 7 through the first air outlet 101 to measure the mercury content, and then enters the sulfur resource utilization device 3 for sulfur resource recovery; the regenerated carbon-based catalyst is cooled in the cooling section 15 and evenly discharged in the discharging section 16.

[0080] In the method of the present invention, in the specific implementation manner, in step S1, when the mercury content in the SO2-containing desorption gas measured by the mercury measurement device 7 no longer increases, that is, reaches a fixed value, it indicates that the carbon-based catalyst in the preparation section 12 has been saturated with adsorption, and step S2 can be started. Or, when the mercury content in the SO2-containing desorption gas measured by the mercury measurement device 7 reaches the set value of the mercury content in the sulfur resource utilization device 3, step S2 can also be started. In the preferred implementation manner, it is bounded by the lowest value among the fixed value of the mercury content in the SO2-containing desorption gas measured by the mercury measurement device 7 or when the mercury content in the SO2-containing desorption gas measured by the mercury measurement device 7 reaches the set value of the mercury content in the sulfur resource utilization device 3.

[0081] In the method of the present invention, in a specific embodiment, in step S2, before the mercury-enriched desorbed gas enters the mercury adsorption tower 5, it is first passed into the cooling device 4 for cooling. In a preferred embodiment, the cooling temperature is 100 - 250 °C, for example, 100 °C, 150 °C, 175 °C, 200 °C, 225 °C or 250 °C. In a preferred embodiment, in step S2, the cooling product obtained from the cooling device 4 is subjected to recovery treatment in the waste liquid treatment device 6.

[0082] In the method of the present invention, in a preferred embodiment, in step S2, when the mercury content measured in the mercury measuring device 7 no longer increases, that is, reaches a fixed value, or when the mercury content in the SO2-containing desorbed gas measured by the mercury measuring device 7 reaches the set value of the mercury content in the sulfur resource utilization device 3, it indicates that the adsorbent in the mercury adsorption tower 5 has been saturated with adsorption, and the adsorbent needs to be replaced in time and the mercury adsorbed by the adsorbent is subjected to resource recovery.

[0083] In the method of the present invention, in a specific embodiment, in step S2, the regenerated and desorbed carbon-based catalyst enters the cooling section 15 for cooling, and the cooled carbon-based catalyst is evenly discharged from the discharge section 16.

[0084] In the method of the present invention, in a specific embodiment, in step S2, protective gases are respectively introduced into the feed section 11 and the discharge section 16. In the specific implementation process, the protective gas introduced into the feed section 11 serves as a sealing gas, and at the same time, as a carrier gas, it is mixed with pollutant gases such as SO2 generated during the reproduction of the carbon-based catalyst to form a desorbed gas and flow downward to the second gas outlet 102; the protective gas introduced into the discharge section 16 mainly prevents external air from leaking from the lower part of the regeneration tower 1 to the cooling section 15, and avoids spontaneous combustion or over-temperature accidents caused by the high-temperature carbon-based catalyst that has not completed the cooling process coming into contact with a higher concentration of oxygen.

[0085] In the method of the present invention, the time used in step S2 should be controlled within a certain range, and too long will affect the mercury content in the desorbed gas. In a specific embodiment, the running time of step S2 is approximately equal to the time required for the material in the preparatory section 12 to pass through the heating section 13 and the desorption section 14.

[0086] The regeneration system of the carbon-based catalyst of the present invention will be further described below through examples. The examples are implemented on the premise of the technical solution of the present invention, and detailed implementation manners and specific operation processes are given, but the protection scope of the present invention is not limited to the following examples.

[0087] The experimental methods in the following examples are all conventional methods in the art unless otherwise specified. The experimental materials used in the following examples can all be commercially obtained unless otherwise specified.

[0088] Example 1

[0089] This example is implemented in the regeneration system of the carbon-based catalyst shown in Figure 1 . The system includes a regeneration tower 1, which is a conventional two-stage regeneration tower. The tower body of the regeneration tower 1 successively includes a feeding section 11, a preparation section 12, a heating section 13, an analysis section 14, a cooling section 15, and a discharging section 16 from top to bottom. The feeding section 11 is provided with a protective gas inlet 103 and a first flow regulating valve 105. The discharging section 16 is provided with a protective gas inlet 104 and a second flow regulating valve 106. Among them, the preparation section 12 is provided with a first air outlet 101. The vertical cross-sectional area of the first air outlet 101 gradually decreases along the flowing direction of the analysis gas and opens upward, and its bottom inclination angle is 60°. The first air outlet 101 is located 0.1 m below the lower end of the tube row structure of the preparation section 12. A mercury measurement device 7 and a sulfur resource utilization device 3 are successively arranged on the connecting pipe of the first air outlet 101 along the gas flow direction. Among them, the set value of the sulfur resource utilization device 3 regarding the mercury content is 0.03 mg / m 3 . A first valve 110 is arranged on the connecting pipe between the first air outlet 101 and the mercury measurement device 7. The first valve 110 is a V-type ball valve. A high-temperature resistant SO2 fan 2 is arranged on the connecting pipe between the mercury measurement device 7 and the sulfur resource utilization device 3; the analysis section 14 is provided with a second air outlet 102. The vertical cross-sectional area of the second air outlet 102 gradually decreases along the flowing direction of the analysis gas and opens upward, and its bottom inclination angle is 60°. The second air outlet 102 is located 0.1 m below the lower end of the tube row structure of the analysis section 14. A mercury adsorption tower 5 is arranged on the connecting pipe between the second air outlet 102 and the mercury measurement device 7. Among them, the adsorption material used in the mercury adsorption tower 5 is the same carbon-based catalyst as that in the regeneration tower 1. A second valve 120 is arranged on the connecting pipe between the second air outlet 102 and the mercury adsorption tower 5. The second valve 120 is a V-type ball valve. A cooling device 4 is arranged on the connecting pipe between the second valve 120 and the mercury adsorption tower 5. A third valve 121 is arranged on the connecting pipe between the cooling device 4 and the mercury adsorption tower 5. A fourth valve 122 is arranged on the connecting pipe between the mercury adsorption tower 5 and the mercury measurement device 7; the regeneration system of the carbon-based catalyst further includes a waste liquid treatment device 6, and the cooling device 4 is communicated with the waste liquid treatment device 6.

[0090] According to Figure 1 the regeneration system of the carbon-based catalyst shown in, the following method is implemented. The method includes the following steps:

[0091] S1. When the system is in the normal operation mode, open the first valve 110 and close the second valve 120. Nitrogen is introduced into the feeding section 11 and the discharging section 16 respectively through the protective gas inlet 103 and the protective gas inlet 104, so that the upper gas in the regeneration tower 1 flows downward and the lower gas flows upward. The carbon-based catalyst saturated with adsorption with a sulfur oxide concentration of 70 mg / g and a mercury concentration of 15 μg / g is transported into the feeding section 11 and the distribution process of the carbon-based catalyst is completed, so that the bed height of the carbon-based catalyst reaches 1.5 m, and it continues to flow downward evenly. Then it is preheated at the preparation section 12 with a temperature of 180 °C, and finally heated and desorbed in the heating section 13 and the desorption section 14 with a desorption temperature of 420 °C to complete the regeneration process of the carbon-based catalyst. The desorbed gas generated by heating and desorption flows upward to reach the preparation section 12. Since the temperature of the preparation section 12 is lower than that in the heating section 13 and the desorption section 14, the mercury vapor in the desorbed gas is condensed at the preparation section 12 and re-enriched on the carbon-based catalyst in the preparation section 12. The remaining desorbed gas enriched with SO2 enters the mercury measuring device 7 from the first gas outlet 101 through the high-temperature resistant SO2 fan 2, the mercury content in the desorbed gas is measured, and the sulfur is resourcefully utilized in the sulfur resource utilization device 3. The measured mercury content in the desorbed gas is 0.03 mg / m 3 , the system stops the normal operation mode and starts the mercury removal mode;

[0092] S2. When the system is in the mercury removal mode, open the second valve 120 and close the first valve 110. The carbon-based catalyst with a mercury concentration of 0.15 mg / g in the preparation section 12 is heated and desorbed in the heating section 13 and the desorption section 14 to complete the regeneration process of the carbon-based catalyst. The desorbed gas enriched with mercury generated by heating and desorption enters the cooling device 4 and the mercury adsorption tower 5 in sequence from the second gas outlet 102. The desorbed gas enriched with mercury is cooled to make the parameters of the desorbed gas meet the inlet conditions in the mercury adsorption tower 5. The condensate and other sediments generated by cooling are collected in the waste liquid treatment device 6. Then the cooled desorbed gas adsorbs and removes mercury in the mercury adsorption tower 5, and the mercury content in the desorbed gas after mercury removal is measured in the mercury measuring device 7. Then the desorbed gas is subjected to sulfur resource treatment in the sulfur resource utilization device 3. When the mercury content in the SO2-containing desorbed gas measured by the mercury measuring device 7 is 0.03 mg / m 3 , the adsorbent is replaced in time and the mercury adsorbed by the adsorbent is resourcefully recovered. The time for which the system is in the mercury removal mode is the time required for all the carbon-based catalysts saturated with adsorbed mercury in the preparation section 12 to pass through the heating section 13 and the desorption section 14.

[0093] Example 2

[0094] It is implemented in the same manner as in Example 1, except that the adsorbed saturated carbon-based catalyst is changed. The specific operation steps are as follows:

[0095] S1. When the system is in the normal operation mode, open the first valve 110 and close the second valve 120. Nitrogen is introduced into the feed section 11 and the discharge section 16 through the protective gas inlet 103 and the protective gas inlet 104 respectively, so that the upper gas in the regeneration tower 1 flows downward and the lower gas flows upward. The adsorbed saturated carbon-based catalyst with a sulfur oxide concentration of 80 mg / g and a mercury concentration of 20 μg / g is transported into the feed section 11 and the distribution process of the carbon-based catalyst is completed, and it continues to flow downward evenly. Then it is preheated in the preheating section 12 at a temperature of 150 °C, and finally heated and desorbed in the heating section 13 and the desorption section 14 at a desorption temperature of 450 °C to complete the regeneration process of the carbon-based catalyst. The desorbed gas generated by heating and desorption flows upward to reach the preheating section 12. Since the temperature of the preheating section 12 is lower than that in the heating section 13 and the desorption section 14, the mercury vapor in the desorbed gas condenses at the preheating section 12 and is re-enriched on the carbon-based catalyst in the preheating section 12. The remaining desorbed gas enriched with SO2 enters the mercury measuring device 7 from the first air outlet 101 through the high-temperature resistant SO2 fan 2, the mercury content in the desorbed gas is measured, and the sulfur is resourcefully utilized in the sulfur resource utilization device 3. The mercury content in the desorbed gas is measured to be 0.03 mg / m 3 , the system stops the normal operation mode and starts the mercury removal mode;

[0096] S2. When the system is in the mercury removal mode, open the second valve 120 and close the first valve 110. The carbon-based catalyst with a mercury concentration of 0.2 mg / g in the preheating section 12 is heated and desorbed in the heating section 13 and the desorption section 14 to complete the regeneration process of the carbon-based catalyst. The desorbed gas enriched with mercury generated by heating and desorption enters the cooling device 4 and the mercury adsorption tower 5 in sequence from the second air outlet 102. The desorbed gas enriched with mercury is cooled to make the parameters of the desorbed gas meet the inlet conditions in the mercury adsorption tower 5. The condensate and other sediments generated by cooling are collected in the waste liquid treatment device 6. Then the cooled desorbed gas adsorbs and removes mercury in the mercury adsorption tower 5, and the mercury content of the desorbed gas after mercury removal is measured in the mercury measuring device 7. Then the desorbed gas is subjected to sulfur resource treatment in the sulfur resource utilization device 3. The mercury content in the SO2-containing desorbed gas measured by the mercury measuring device 7 is 0.03 mg / m 3, the system stops the normal mercury removal mode, replaces the adsorbent in time, and conducts resource recovery on the mercury adsorbed by the adsorbent. The time for which the system is in the mercury removal mode is the time required for all the carbon-based catalysts saturated with adsorbed mercury in the preparation section 12 to pass through the heating section 13 and the desorption section 14.

[0097] As can be seen from the above embodiments, by using the regeneration system of the carbon-based catalyst of the present invention, the regeneration of the carbon-based catalyst can be completed. At the same time, the effective separation of mercury and gases such as SO2 in the desorbed gas generated during the regeneration process can be achieved, and the separated mercury and gases such as SO2 can be respectively utilized for resource recovery.

[0098] The preferred embodiments of the present invention have been described in detail above. However, the present invention is not limited thereto. Within the scope of the technical concept of the present invention, various simple modifications can be made to the technical solutions of the present invention, including any other suitable combination of each technical feature. These simple modifications and combinations should also be regarded as the content disclosed by the present invention and fall within the protection scope of the present invention.

Claims

1. A regeneration system for a carbon-based catalyst, characterized in that, The system includes a regeneration tower (1), a mercury measurement device (7), a sulfur resource utilization device (3), and a mercury adsorption tower (5). The tower body of the regeneration tower (1) sequentially includes a feeding section (11), a preparation section (12), a heating section (13), and an analysis section (14) from top to bottom. Among them, a first gas outlet (101) is arranged on the side of the preparation section (12), and a second gas outlet (102) is arranged on the side of the analysis section (14). The first gas outlet (101) is communicated with the mercury measurement device (7) through a connecting pipeline, and the second gas outlet (102) is sequentially communicated with the mercury adsorption tower (5) and the mercury measurement device (7) through a connecting pipeline. The mercury measurement device (7) is communicated with the sulfur resource utilization device (3); A first valve (110) is arranged on the connecting pipeline between the first gas outlet (101) and the mercury measurement device (7); A second valve (120) is arranged on the connecting pipeline between the second gas outlet (102) and the mercury adsorption tower (5).

2. The regeneration system of the carbon-based catalyst according to claim 1, wherein The openings of the first gas outlet (101) and the second gas outlet (102) face upward.

3. The regeneration system of the carbon-based catalyst according to claim 1 or 2, characterized in that, The vertical cross-sectional areas of the first gas outlet (101) and the second gas outlet (102) gradually decrease along the flowing direction of the analysis gas.

4. The regeneration system of the carbon-based catalyst according to claim 1, wherein A cooling device (4) is arranged on the connecting pipeline between the second valve (120) and the mercury adsorption tower (5).

5. The regeneration system of the carbon-based catalyst according to claim 4, wherein, The carbon-based catalyst regeneration system further includes a waste liquid treatment device (6), and the cooling device (4) is communicated with the waste liquid treatment device (6).

6. The regeneration system of the carbon-based catalyst according to claim 5, characterized in that, A third valve (121) is arranged on the connecting pipeline between the cooling device (4) and the mercury adsorption tower (5).

7. The regeneration system of the carbon-based catalyst according to claim 6, wherein, A fourth valve (122) is arranged on the connecting pipeline between the mercury adsorption tower (5) and the mercury measurement device (7).

8. The regeneration system of the carbon-based catalyst according to claim 1 or 7, characterized in that, A blower (2) is arranged on the connecting pipeline between the mercury measurement device (7) and the sulfur resource utilization device (3).

9. The regeneration system of the carbon-based catalyst according to claim 1 or 7, characterized in that, The lower part of the regeneration tower (1) further includes a cooling section (15) and a discharging section (16) which are sequentially arranged from top to bottom.

10. The regeneration system of the carbon-based catalyst according to claim 9, characterized in that, The feeding section (11) is provided with an air inlet (103) for introducing a protective gas into the feeding section (11).

11. The regeneration system of the carbon-based catalyst according to claim 10, wherein The discharging section (16) is provided with an air inlet (104) for introducing a protective gas into the discharging section (16).

12. The regeneration system of the carbon-based catalyst according to claim 11, wherein The feeding section (11) is further provided with a first flow regulating valve (105) for controlling the flow rate of the protective gas entering the feeding section (11).

13. The regeneration system of the carbon-based catalyst according to claim 12, wherein The discharging section (16) is further provided with a second flow regulating valve (106) for controlling the flow rate of the protective gas entering the discharging section (16).

14. A method for regenerating a carbon-based catalyst, which is implemented in the system according to any one of claims 1-13, characterized in that, The method includes the following steps: S1. Open the first gas outlet (101) and close the second gas outlet (102) simultaneously. Transport the carbon-based catalyst saturated with adsorption to the feeding section (11). Then, the carbon-based catalyst saturated with adsorption passes through the preparation section (12), the heating section (13), and the desorption section (14) in sequence for desorption. The desorbed gas generated is subjected to mercury condensation and enrichment in the preparation section (12). The SO2-containing desorbed gas with mercury removed enters the mercury measurement device (7) through the first gas outlet (101) to measure the mercury content, and then enters the sulfur resource utilization device (3) for treatment. S2. When the mercury content in the SO2-containing desorbed gas in step S1 reaches a fixed value or meets the set value of the mercury content in the sulfur resource utilization device (3), close the first gas outlet (101) and open the second gas outlet (102) simultaneously. The carbon-based catalyst enriched with mercury in the preparation section (12) passes through the heating section (13) and the desorption section (14) in sequence for desorption. The desorbed gas enriched with mercury enters the mercury adsorption tower (5) through the second gas outlet (102), and mercury is adsorbed in the mercury adsorption tower (5). The desorbed gas after mercury adsorption and removal enters the mercury measurement device (7) to measure the mercury content, and then enters the sulfur resource utilization device (3) for treatment.

15. The regeneration method of the carbon-based catalyst according to claim 14, wherein In step S1, the carbon-based catalyst saturated with adsorption is obtained by the carbon-based catalyst adsorbing the flue gas containing sulfur oxides, mercury, nitrogen oxides, water, and dust.

16. The regeneration method of the carbon-based catalyst according to claim 14 or 15, characterized in that, The temperature in the preparation section (12) is 150 - 250 °C.

17. The regeneration method of the carbon-based catalyst according to claim 16, characterized in that, The temperature in the heating section (13) is 380 - 450 °C.

18. The regeneration method of the carbon-based catalyst according to claim 17, characterized in that, The temperature in the desorption section (14) is 380 - 450 °C.

19. The regeneration method of the carbon-based catalyst according to claim 15 or 17, characterized in that, In step S2, before the desorbed gas enriched with mercury enters the mercury adsorption tower (5), it is first passed through the cooling device (4) for cooling. The cooling temperature is 100 - 250 °C.

20. The regeneration method of the carbon-based catalyst according to claim 19, wherein In step S2, the cooling product obtained from the cooling device (4) is treated in the waste liquid treatment device (6).

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