Active coke desulfurization tower and active coke desulfurization system

Abstract

The invention discloses an active coke desulfurization tower and an active coke desulfurization system, and relates to the technical field of active coke flue gas purification, the active coke desulfurization tower comprises a tower body, a gas inlet chamber, a desulfurization part and a gas outlet chamber; the gas inlet chamber is arranged in the tower body; the desulfurization parts are symmetrically arranged on two sides of the gas inlet chamber and are used for accommodating active coke; the gas outlet chambers are symmetrically arranged on the two sides of the gas inlet chamber and are arranged on the outer side of the desulfurization part; flue gas generated by the coal gas power generation boiler enters the tower body through the gas inlet chamber, passes through the desulfurization part and is finally discharged out of the tower body through the gas outlet chamber. According to the technical scheme, the interior of the tower body is divided into the gas inlet chamber, the desulfurization part and the gas outlet chamber, and the active coke substance is placed in the desulfurization part, so that the flue gas generated by the coal gas power generation boiler enters the tower body from the gas inlet chamber, passes through the desulfurization part, is desulfurized by the active coke, and is finally discharged out of the tower body from the gas outlet chamber; and thus, effective evolution of the low-concentration sulfide flue gas is realized.

Description

Technical Field

[0001] The invention relates to the technical field of activated coke flue gas purification, and in particular to an activated coke desulfurization tower and an activated coke desulfurization system. Background Art

[0002] Activated coke flue gas treatment technology can integrate desulfurization, denitrification, dust removal, and dioxin removal. Many practices have shown that the activated coke process has the advantages of integrated removal of multiple pollutants, no secondary pollutant discharge, and sulfur resource recovery. At present, the activated coke desulfurization and denitrification process has been widely used in flue gas treatment fields such as sintering, pelletizing, and coking, while the flue gas treatment of blast furnace hot blast furnaces, gas power plants, and steel rolling heating furnaces rarely sees its related application performance. The SO2 concentration in sintering and pelletizing flue gas is generally 800-1500 mg / Nm3, while the SO2 concentration in gas power generation boiler flue gas is generally only 60-100 mg / Nm3, which is an order of magnitude difference from sintering and pelletizing flue gas. According to the adsorption kinetics, the change in SO2 volume fraction will affect the initial adsorption rate of activated coke. The existing sintering flue gas activated coke desulfurization device and production experience are not fully applicable to the purification of low SO2 concentration flue gas. Summary of the invention

[0003] The main purpose of the present invention is to propose an activated coke desulfurization tower and an activated coke desulfurization system, aiming to provide an activated coke desulfurization tower and an activated coke desulfurization system which can effectively purify low-concentration sulfide flue gas generated by a coal gas power generation boiler.

[0004] In order to achieve the above-mentioned object, the activated coke desulfurization tower proposed in the present invention comprises:

[0005] tower body;

[0006] An air inlet chamber is arranged inside the tower body;

[0007] a desulfurization section, symmetrically arranged on both sides of the air inlet chamber, for accommodating activated coke; and

[0008] An air outlet chamber is symmetrically arranged on both sides of the air inlet chamber and arranged outside the desulfurization part;

[0009] The flue gas generated by the gas-fired power generation boiler enters the tower body from the air inlet chamber, passes through the desulfurization section, and is finally discharged from the tower body from the air outlet chamber.

[0010] In one embodiment, the desulfurization unit further comprises:

[0011] A first coke chamber, arranged outside the air inlet chamber;

[0012] a first grid plate, used to separate the first coke chamber and the air inlet chamber;

[0013] A second focal chamber is disposed outside the first focal chamber; and

[0014] The second grid plate is used to separate the second coke chamber and the gas outlet chamber.

[0015] In one embodiment, the desulfurization section further includes a porous plate disposed between the first coke chamber and the second coke chamber to separate the first coke chamber and the second coke chamber.

[0016] In one embodiment, the width of the first focal chamber is smaller than the width of the second focal chamber.

[0017] In one embodiment, the activated coke desulfurization tower further comprises:

[0018] A feed section is arranged above the top of the tower body relative to the desulfurization section; and

[0019] The discharge part is arranged at the bottom of the tower body and below the desulfurization part.

[0020] In one embodiment, the discharge part further comprises:

[0021] A first valve body is installed corresponding to the first coke chamber; and

[0022] The second valve body is installed corresponding to the second coke chamber.

[0023] In one embodiment, the gas outlet chamber is further provided with a first sensor for detecting the concentration of sulfide in the exhaust flue gas.

[0024] In one embodiment, the air inlet chamber further comprises:

[0025] The second sensor is used to detect whether nitrates are present in the flue gas;

[0026] An ammonia spraying device is used to spray ammonia into the flue gas;

[0027] When the second sensor detects the presence of nitrate in the flue gas, the ammonia spraying device is started.

[0028] The present invention further provides an activated coke desulfurization system, comprising an activated coke desulfurization tower as described in any one of the above items, wherein a plurality of the activated coke desulfurization towers are arranged in parallel.

[0029] In one embodiment, the activated coke desulfurization system further includes a regeneration device for collecting the waste coke discharged from the discharge part for reuse.

[0030] The technical solution of the present invention is to divide the interior of the tower body into the air inlet chamber, the desulfurization section and the air outlet chamber, and to place the activated coke material in the desulfurization section. In this way, the flue gas generated by the gas-fired power generation boiler enters the tower body from the air inlet chamber, passes through the desulfurization section, and is desulfurized by the activated coke, and finally discharged from the tower body from the air outlet chamber, thereby achieving effective evolution of low-concentration sulfide flue gas. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on the structures shown in these drawings without paying creative work.

[0032] Figure 1 This is a schematic structural diagram of an embodiment of an activated coke desulfurization tower provided by the present invention.

[0033] Description of Figure Numbers:

[0034] 100. Activated coke desulfurization tower; 1. tower body; 2. air inlet chamber; 21. ammonia injection device; 3. desulfurization section; 31. first coke chamber; 32. first grid plate; 33. second coke chamber; 34. second grid plate; 35. porous plate; 4. air outlet chamber; 5. feed section; 6. discharge section; 61. first valve body; 62. second valve body;

[0035] 200. Activated coke desulfurization system.

[0036] The realization of the purpose, functional features and advantages of the present invention will be further explained in conjunction with embodiments and with reference to the accompanying drawings. DETAILED DESCRIPTION

[0037] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0038] It should be noted that if the embodiments of the present invention involve directional indications (such as up, down, left, right, front, back, etc.), the directional indications are only used to explain the relative position relationship, movement status, etc. between the components in a certain specific posture. If the specific posture changes, the directional indication will also change accordingly.

[0039] In addition, if there are descriptions involving "first", "second", etc. in the embodiments of the present invention, the descriptions of "first", "second", etc. are only used for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of technical features indicated. Therefore, the features limited to "first" and "second" may explicitly or implicitly include at least one of the features. In addition, if "and / or" or "and / or" appears in the full text, its meaning includes three parallel solutions. Taking "A and / or B" as an example, it includes solution A, solution B, or solutions that satisfy both A and B. In addition, the technical solutions between the various embodiments can be combined with each other, but it must be based on the ability of ordinary technicians in this field to implement. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such combination of technical solutions does not exist and is not within the scope of protection required by the present invention.

[0040] Activated coke flue gas treatment technology can integrate desulfurization, denitrification, dust removal, and dioxin removal. Many practices have shown that the activated coke process has the advantages of integrated removal of multiple pollutants, no secondary pollutant discharge, and sulfur resource recovery. At present, the activated coke desulfurization and denitrification process has been widely used in flue gas treatment fields such as sintering, pelletizing, and coking, while the flue gas treatment of blast furnace hot blast furnaces, gas power plants, and steel rolling heating furnaces rarely sees its related application performance. The SO2 concentration in sintering and pelletizing flue gas is generally 800-1500 mg / Nm3, while the SO2 concentration in gas power generation boiler flue gas is generally only 60-100 mg / Nm3, which is an order of magnitude difference from sintering and pelletizing flue gas. According to the adsorption kinetics, the change in SO2 volume fraction will affect the initial adsorption rate of activated coke. The existing sintering flue gas activated coke desulfurization device and production experience are not fully applicable to the purification of low SO2 concentration flue gas.

[0041] In order to solve the above problems, the present invention proposes an activated coke desulfurization tower and an activated coke desulfurization system, aiming to provide an activated coke desulfurization tower and an activated coke desulfurization system which can effectively purify low-concentration sulfide flue gas generated by a coal gas power generation boiler. Figure 1 A schematic structural diagram of an embodiment of an activated coke desulfurization tower provided by the present invention.

[0042] Please refer to Figure 1 In one embodiment of the present invention, the activated coke desulfurization tower 100 includes a tower body 1, an air inlet chamber 2, a desulfurization section 3 and an air outlet chamber 4; the air inlet chamber 2 is arranged inside the tower body 1; the desulfurization section 3 is symmetrically arranged on both sides of the air inlet chamber 2 to accommodate the activated coke; the air outlet chamber 4 is symmetrically arranged on both sides of the air inlet chamber 2 and is arranged on the outside of the desulfurization section 3; wherein the flue gas generated by the gas power generation boiler enters the tower body 1 from the air inlet chamber 2, passes through the desulfurization section 3, and is finally discharged from the tower body 1 from the air outlet chamber 4.

[0043] The technical solution of the present invention is to divide the interior of the tower body 1 into the air inlet chamber 2, the desulfurization section 3 and the air outlet chamber 4, and place the activated coke material in the desulfurization section 3. In this way, the flue gas generated by the gas power generation boiler enters the tower body 1 from the air inlet chamber 2, passes through the desulfurization section 3, and is desulfurized by the activated coke, and finally discharged from the tower body 1 from the air outlet chamber 4, thereby achieving effective evolution of low-concentration sulfide flue gas.

[0044] For further information, please refer to Figure 1 The desulfurization section 3 also includes a first coke chamber 31, a first grid plate 32, a second coke chamber 33 and a second grid plate 34: the first coke chamber 31 is arranged outside the air inlet chamber 2; the first grid plate 32 is used to separate the first coke chamber 31 and the air inlet chamber 2; the second coke chamber 33 is arranged outside the first coke chamber 31; the second grid plate 34 is used to separate the second coke chamber 33 and the air outlet chamber 4.

[0045] It is understandable that, since the desulfurization section 3 contains activated coke, and activated coke has an excellent adsorption effect on sulfides, specifically, taking sulfur dioxide (SO2) as an example, the desulfurization of activated coke is carried out by physical adsorption and chemical adsorption. On the one hand, under the action of van der Waals force and chemical affinity, SO2 moves from the gas phase to the surface of the activated coke particles and is captured, which belongs to physical adsorption; on the other hand, it is oxidized into sulfur trioxide (SO3) in the pores of the activated coke and reacts with the water molecules (H2O) adsorbed together, and then is captured as sulfuric acid (H2SO4), which belongs to chemical adsorption. Therefore, the first coke chamber 31 is set outside the air inlet chamber 2 to carry out the flue gas desulfurization process, and the first grid plate 32 separates the first coke chamber 31 and the air inlet chamber 2, so that before the first coke chamber 31 desulfurizes the flue gas, large particles of impurities are first screened out, thereby ensuring the smooth progress of the activated coke desulfurization process in the first coke chamber 31.

[0046] At the same time, in order to further ensure the degree of purification of the flue gas after desulfurization from the first coke chamber 31, the desulfurization section 3 also includes a second coke chamber 33, which also contains active coke and is arranged on the outside of the first coke chamber 31, so as to perform another desulfurization process on the flue gas discharged from the first coke chamber 31, thereby ensuring that the flue gas entering from the air inlet chamber 2 is thoroughly purified of the sulfide contained in the desulfurization section 3; and the second grid plate 34 is used to separate the second coke chamber 33 and the air outlet chamber 4. On the one hand, the second grid plate 34 cooperates with the first grid plate 32 to limit the active coke in the first coke chamber 31 and the second coke chamber 33. At the same time, the second grid plate 34 can further filter and screen out large particles of impurities in the flue gas entering from the air inlet chamber 2, so that the discharged flue gas not only does not contain sulfides, but also large particles of impurities are filtered clean by the first grid plate 32 and the second grid plate 34, thereby ensuring the cleanliness of the flue gas discharged from the desulfurization section 3.

[0047] For further information, please refer to Figure 1 , the desulfurization section 3 further includes a porous plate 35, which is arranged between the first coke chamber 31 and the second coke chamber 33, so as to separate the first coke chamber 31 and the second coke chamber 33. It can be understood that in order to physically distinguish the first coke chamber 31 and the second coke chamber 33, the desulfurization section 3 further includes the porous plate 35, which is arranged between the first coke chamber 31 and the second coke chamber 33, so as to separate the first coke chamber 31 and the second coke chamber 33; and at the same time, the porous plate 35 cooperates with the first grid plate 32 and the second grid plate 34 respectively, so as to restrict the active coke in the first coke chamber 31 and the second coke chamber 33 respectively along the gravity direction, and the pores of the porous plate 35 can only be smaller than the diameter of the active coke particles, thereby ensuring that the active coke particles in the first coke chamber 31 and the second active coke particles do not interpenetrate with each other, and the porous plate 35 can only allow gas molecules to pass through, thereby further filtering the flue gas.

[0048] For further information, please refer to Figure 1 , the width of the first coke chamber 31 is smaller than the width of the second coke chamber 33. It can be understood that the active coke has a very obvious effect on the removal of sulfide, and the first coke chamber 31 is the most effective in desulfurization, and along the width direction of the first coke chamber 31, the farther away from the air inlet chamber 2, the more difficult it is to adsorb sulfide. When the active coke in the first coke chamber 31 adsorbs sulfide to saturation, the active coke particles in the first coke chamber 31 lose their adsorption effect on sulfide, and at this time, the active coke particles in the first coke chamber 31 need to be replaced.

[0049] It can be understood that the activated coke particles in the first coke chamber 31 can achieve an adsorption effect of sulfides in the flue gas of more than 90% of the total amount of sulfides in the flue gas, while the activated coke particles in the second coke chamber 33 are mainly used to purify the flue gas discharged from the first coke chamber 31 again, thereby further ensuring the purification degree of the discharged flue gas.

[0050] It can be seen that, by comparing the effects of the activated coke in the first coke chamber 31 and the activated coke in the second coke chamber 33, it can be known that the first coke chamber 31 is the main force for removing sulfides in the flue gas, and only relatively thin activated coke particles are needed to complete the main desulfurization work, while the activated coke particles in the second coke chamber 33 are mainly used to provide a protective adsorption of the residual sulfides in the flue gas discharged from the first coke chamber 31. On the one hand, in order to ensure the main adsorption effect of the desulfurization section 3, the residual amount of sulfides in the flue gas is controlled within 0.1%, and on the other hand, the desulfurization effect is achieved by lengthening the adsorption time. In this way, the active coke in the second coke chamber 33 is set to be thicker, and then, the width of the first coke chamber 31 is smaller than that of the second coke chamber 33, further differentiating the functionality of the first coke chamber 31 and the second coke chamber 33 for the desulfurization process.

[0051] Specifically, in one embodiment, the total width of the desulfurization section 3 is 1000 mm, wherein the width of the first coke chamber 31 may be 200 mm or 300 mm, and correspondingly, the width of the second coke chamber 33 is 800 mm or 700 mm.

[0052] In addition, please refer to Figure 1 The activated coke desulfurization tower 100 further includes a feed section 5 and a discharge section 6; the feed section 5 is arranged at the top of the tower body 1 above the desulfurization section 3; the discharge section 6 is arranged at the bottom of the tower body 1 below the desulfurization section 3. It can be understood that the first coke chamber 31 and the second coke chamber 33 are arranged along the height of the tower body 1 to facilitate the active coke particles to form an adsorption wall along the gravity direction, and the active coke adsorption has a service life. Therefore, the active coke desulfurization tower 100 also includes the feeding section 5 and the discharging section 6, so that the expired active coke particles in the desulfurization section 3 are removed through the discharging section 6, and then the active coke particles with adsorption desulfurization effect are added to the desulfurization section 3 through the feeding section 5; for the convenience of feeding and unloading, in this embodiment, the feeding section 5 is arranged at the top of the tower body 1 above the desulfurization section 3; the discharging section 6 is arranged at the bottom of the tower body 1 below the desulfurization section 3, thereby, whether it is new active coke or expired active coke, in the process of feeding or unloading the desulfurization section 3, it moves along the gravity direction, thereby, no additional equipment or manpower operation is required, and the user's operation intensity and difficulty are greatly reduced.

[0053] For further information, please refer to Figure 1 , the discharge part 6 also includes a first valve body 61 and a second valve body 62; the first valve body 61 is installed corresponding to the first coke chamber 31; the second valve body 62 is installed corresponding to the second coke chamber 33. It can be understood that since the active coke particles in the first coke chamber 31 can remove 90% of the total amount of sulfides in the flue gas when the flue gas is desulfurized for the first time, correspondingly, the second coke chamber 33 only needs to process 10% of the remaining total amount of sulfides. It can be seen that the first coke chamber 31 is the main force of desulfurization, and the active coke particles in the first coke chamber 31 expire much faster than those in the second coke chamber 33. Therefore, the replacement frequency of the active coke particles in the first coke chamber 31 is much greater than the replacement frequency of the active coke particles in the second coke chamber 33. Therefore, in order to avoid replacing the active coke particles in the first coke chamber 31, the replacement frequency of the active coke particles in the second coke chamber 33 is much higher than that of the second coke chamber 33. When the particles are removed, the active coke particles in the second coke chamber 33 are also removed, which causes waste and increases the economic cost. Therefore, in this embodiment, the unloading part 6 also includes the first valve body 61 and the second valve body 62; the first valve body 61 is installed corresponding to the first coke chamber 31; the second valve body 62 is installed corresponding to the second coke chamber 33. With this arrangement, the first coke chamber 31 and the second coke chamber 33 achieve the technical effect of separate unloading, thereby ensuring that the active coke particles in the second coke chamber 33 are not wasted due to the replacement of the active coke particles in the first coke chamber 31, thereby improving the economy of the activated coke desulfurization tower 100.

[0054] Furthermore, the gas outlet chamber 4 is also provided with a first sensor for detecting the sulfide concentration in the exhaust flue gas. It is understandable that in order to determine the desulfurization effect of the activated coke desulfurization tower 100 on the flue gas, the gas outlet chamber 4 is also provided with the first sensor for detecting the sulfide concentration in the exhaust flue gas. If the sulfide concentration detected by the first sensor is higher than a preset value, the entire activated coke desulfurization tower 100 fails. At this time, it is necessary to stop continuing to introduce flue gas into the activated coke desulfurization tower 100, and then the activated coke desulfurization tower 100 needs to be repaired.

[0055] In addition, please refer to Figure 1, the air inlet chamber 2 further includes a second sensor and an ammonia spraying device 21; the second sensor is used to detect whether there is nitrate in the flue gas; the ammonia spraying device 21 is used to spray ammonia into the flue gas; wherein, when the second sensor detects the presence of nitrate in the flue gas, the ammonia spraying device 21 is started. It can be understood that it is difficult to ensure that nitrate will not be mixed into the flue gas generated by the gas-fired power generation boiler. Nitrate is also a pollutant and needs to be removed. In some examples, the two processes of desulfurization and denitrification require their own removal equipment. On the one hand, the removal cost is too high, and on the other hand, it greatly wastes manpower. Therefore, in this embodiment, the air inlet chamber 2 further includes the second sensor and the ammonia spraying device 21. The second sensor is used to detect whether there is nitrate in the flue gas. When the second sensor detects the presence of nitrate in the flue gas, the ammonia spraying device 21 is started to pass ammonia into the flue gas.

[0056] Specifically, common nitrate pollutants are nitrogen monoxide and nitrogen dioxide. The ammonia gas sprayed out by the ammonia spraying equipment reacts the nitrate to produce nitrogen and water, thereby completing the denitration process. In this way, the activated coke desulfurization tower 100 can not only desulfurize but also denitrate, and one tower can be used for multiple purposes, thereby further improving the applicability of the activated coke desulfurization tower 100.

[0057] The present invention also proposes an activated coke desulfurization system 200, which includes the activated coke desulfurization tower 100. The specific structure of the activated coke desulfurization tower 100 refers to the above-mentioned embodiment. Since the activated coke desulfurization system 200 adopts all the technical solutions of all the above-mentioned embodiments, it has at least all the beneficial effects brought by the technical solutions of the above-mentioned embodiments, which will not be repeated here one by one.

[0058] Among them, the activated coke desulfurization tower 100 is provided in multiple parallel configurations. It is understandable that when the total amount of flue gas generated by the gas-fired power generation boiler is too much, in order to speed up the desulfurization efficiency of the flue gas, the activated coke desulfurization tower 100 is provided in multiple parallel configurations to share the total amount of flue gas, thereby speeding up the desulfurization speed of the flue gas and improving the desulfurization efficiency of the activated coke desulfurization system 200.

[0059] In addition, the activated coke desulfurization system 200 also includes a regeneration device for collecting the waste coke discharged from the discharge part 6 for reuse. It can be understood that in order to maximize the utilization of resources, the activated coke desulfurization system 200 also includes the regeneration device for collecting the waste coke discharged from the discharge part 6 for reuse; specifically, the activated coke discharged from the tower body 1 can be first sent to the regeneration device for regeneration, and the regenerated activated coke can be used for the activated coke desulfurization and denitrification process of high-sulfur flue gas such as sintering and pelletizing flue gas. The broken coke in the circulation process can be sent to sintering and blast furnace combustion, or sent to the coke preparation workshop for reuse. The acid-containing waste gas generated by the regeneration of activated coke can be used to prepare concentrated sulfuric acid, thereby fully reducing the generation of waste pollutants in the production process and achieving maximum utilization of resources.

[0060] The above description is only an exemplary embodiment of the present invention, and does not limit the patent scope of the present invention. All equivalent structural changes made by using the contents of the present invention specification and drawings under the technical concept of the present invention, or directly / indirectly applied in other related technical fields are included in the patent protection scope of the present invention.

Claims

1. An activated coke desulfurization tower, applied to flue gas generated by a gas-fired power generation boiler, characterized in that: include: tower body; An air inlet chamber is arranged inside the tower body; The desulfurization part is symmetrically arranged on both sides of the air inlet chamber to accommodate the activated coke; as well as, An air outlet chamber is symmetrically arranged on both sides of the air inlet chamber and arranged outside the desulfurization part; The flue gas generated by the gas-fired power generation boiler enters the tower body from the air inlet chamber, passes through the desulfurization section, and is finally discharged from the tower body from the air outlet chamber.

2. The activated coke desulfurization tower according to claim 1, characterized in that: The desulfurization unit also includes: A first coke chamber, arranged outside the air inlet chamber; a first grid plate, used to separate the first coke chamber and the air inlet chamber; A second focal chamber is disposed outside the first focal chamber; and The second grid plate is used to separate the second coke chamber and the gas outlet chamber.

3. The activated coke desulfurization tower according to claim 2, characterized in that: The desulfurization section further includes a porous plate disposed between the first coke chamber and the second coke chamber to separate the first coke chamber and the second coke chamber.

4. The activated coke desulfurization tower according to claim 2, characterized in that: The width of the first focal chamber is smaller than the width of the second focal chamber.

5. The activated coke desulfurization tower according to claim 2, characterized in that: The activated coke desulfurization tower also includes: A feed section is arranged above the top of the tower body relative to the desulfurization section; and The discharge part is arranged at the bottom of the tower body and below the desulfurization part.

6. The activated coke desulfurization tower according to claim 5, characterized in that: The unloading part also includes: A first valve body is installed corresponding to the first coke chamber; and The second valve body is installed corresponding to the second coke chamber.

7. The activated coke desulfurization tower according to claim 1, characterized in that: The gas outlet chamber is also provided with a first sensor for detecting the sulfide concentration in the exhaust flue gas.

8. The activated coke desulfurization tower according to claim 1, characterized in that: The air inlet chamber also includes: The second sensor is used to detect whether nitrates are present in the flue gas; An ammonia spraying device is used to spray ammonia into the flue gas; When the second sensor detects the presence of nitrate in the flue gas, the ammonia spraying device is started.

9. An activated coke desulfurization system, comprising the activated coke desulfurization tower according to any one of claims 1 to 8, wherein a plurality of the activated coke desulfurization towers are arranged in parallel.

10. The activated coke desulfurization system according to claim 9, characterized in that: The activated coke desulfurization system further comprises a regeneration device for collecting the waste coke discharged from the discharge part for reuse.

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