Denitrification process for industrial waste gas

Abstract

A denitrification process for industrial waste gas, comprising: step S1, discharging industrial waste gas from a boiler (10) and introducing same into a pre-cooler (40), the pre-cooler (40) cooling the temperature of the industrial waste gas to below 80°C; step S2, allowing ozone inside an ozone generator (50) to reach with nitric oxide in the cooled industrial waste gas, so as to generate a high-valence nitrogen oxide, the molar ratio of the nitric oxide to the ozone inside the ozone generator (50) being 1:1-1:2; and step S3, introducing the high-valence nitrogen oxide and the cooled industrial waste gas into an adsorption tower (60), an adsorbent inside the adsorption tower (60) adsorbing the oxidized industrial waste gas, and discharging the treated clean gas from the adsorption tower (60). An appropriate excess of ozone can inhibit the disproportionation reaction of an adsorbent during adsorption of nitrogen dioxide, and can also minimize ozone consumption, thus avoiding the waste of ozone.

Description

A denitrification process for industrial waste gas Technical Field

[0001] The invention belongs to the technical field of flue gas pollutant emission reduction and relates to a denitration process for industrial waste gas. Background Art

[0002] Industrial waste gas refers to various polluting gases discharged into the air during fuel combustion and production processes within enterprise factories, including carbon dioxide, carbon disulfide, hydrogen sulfide, fluoride, nitrogen oxides, chlorine, hydrogen chloride, carbon monoxide, sulfuric acid (mist), lead and mercury, beryllium, smoke and productive dust, etc. These industrial waste gases discharged into the atmosphere will seriously pollute the air and endanger people's lives and health.

[0003] The mainstream technology for traditional industrial waste gas denitrification is SCR denitrification technology. SCR denitrification technology has the advantages of high denitrification efficiency and small footprint. However, conventional SCR industrial waste gas denitrification technology requires a relatively high temperature (350-420°C). If the reaction temperature is too low, not only the denitrification efficiency is affected, but more importantly, the catalyst is easily poisoned, which poses a major safety hazard in production and easily causes secondary pollution during the production process. In addition, the high price of denitrification catalysts leads to high production costs. Therefore, it is very necessary to develop a denitrification process for industrial waste gas that is highly safe and does not cause secondary pollution.

[0004] Summary of the Invention

[0005] The purpose of the present invention is to solve the above problems and provide a denitrification process for industrial waste gas. The denitrification process for industrial waste gas has high production safety and no secondary pollution.

[0006] In order to solve the above technical problems, the technical solutions adopted by the present invention are as follows:

[0007] A denitrification process for industrial waste gas, comprising:

[0008] Step S1, discharging the industrial waste gas from the boiler and passing it into a precooler, wherein the precooler cools the temperature of the industrial waste gas to below 80°C;

[0009] Step S2, reacting ozone in the ozone generator with nitric oxide in the cooled industrial waste gas to generate high-valent nitrogen oxides, wherein the molar ratio of nitric oxide to ozone in the ozone generator is 1:1-1:2;

[0010] Step S3: introducing the high-valent nitrogen oxides and the cooled industrial waste gas into an adsorption tower, wherein the adsorbent in the adsorption tower adsorbs the oxidized industrial waste gas and discharges the treated clean gas from the adsorption tower.

[0011] Preferably, in step S2, the content of nitric oxide in the cooled industrial waste gas is monitored by a nitric oxide concentration sensor, and the molar ratio of nitric oxide to ozone in the ozone generator is controlled to be 1:1-1:2 according to the monitored nitric oxide content.

[0012] Preferably, in step S3, the adsorbent is ZSM-5 molecular sieve or 13X molecular sieve or other zeolite molecular sieves.

[0013] Preferably, the step S3 further includes:

[0014] Step S4, passing the adsorbent after the reaction in step S3 into a regeneration tower, and passing a regeneration heat source into the regeneration tower;

[0015] The regeneration tower decomposes the reacted adsorbent into nitrogen oxides, the regeneration heat source heats and regenerates the reacted adsorbent, and the regenerated adsorbent is passed into the adsorption tower for recycling.

[0016] Preferably, the nitrogen oxides after the analysis treatment are introduced into the boiler and continue to burn until the concentration of nitrogen oxides in the industrial waste gas is balanced.

[0017] Preferably, the nitrogen oxides after the analysis treatment are converted into nitric acid or nitrate.

[0018] Preferably, in step S3, the adsorption tower includes a packing portion, at least two feed portions provided at an upper end of the packing portion, and at least two discharge portions provided at a lower end of the packing portion.

[0019] Preferably, the adsorption tower also includes a partition plate axially arranged in the adsorption tower, the partition plate passes through the filler portion and the upper and lower ends extend to the top wall of the flue gas channel and the second screen respectively; the partition plate includes a first partition plate and a second partition plate arranged perpendicular to each other, the first partition plate and the second partition plate divide the adsorption tower into a number of partition chambers.

[0020] Preferably, when the boiler is a gas boiler, the step S1 further includes:

[0021] Step S0: passing the industrial waste gas into an air preheater, the air preheater performs heat recovery treatment on the industrial waste gas, and passing the treated industrial waste gas into a precooler.

[0022] Preferably, when the boiler is a non-gas-fired boiler, the step of passing the preheated industrial waste gas into the precooler further comprises:

[0023] The preheated industrial waste gas is passed into a dust collector, which removes dust from the preheated industrial waste gas, and the industrial waste gas after the dust is removed is passed into a precooler.

[0024] The present invention provides a denitration process for industrial waste gas. The ozone generated by the ozone generator is used to oxidize the industrial waste gas. Low-valent nitrogen monoxide is oxidized into high-valent nitrogen oxides. The high-valent nitrogen oxides are more effectively adsorbed by an adsorbent in an adsorption tower. An appropriate excess of ozone can inhibit the disproportionation reaction of the adsorbent during the adsorption of nitrogen dioxide. At the same time, the amount of ozone added can be saved to the maximum extent, thereby preventing ozone waste. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] FIG1 is a flow chart of a denitrification process for industrial waste gas provided by an embodiment of the present invention;

[0026] FIG2 is a schematic diagram of a denitration system for industrial waste gas provided by an embodiment of the present invention;

[0027] FIG3 is a structural diagram of an adsorption tower provided by an embodiment of the present invention;

[0028] FIG4 is a schematic structural diagram of a partition board provided by an embodiment of the present invention;

[0029] Among them, 10 is a boiler, 20 is an air preheater, 30 is a dust collector, 40 is a precooler, 50 is an ozone generator, 51 is a solenoid valve, 52 is a nitrogen monoxide concentration sensor, 60 is an adsorption tower, 601 is an industrial waste gas inlet, 602 is an exhaust gas outlet, 603 is a packing part, 604 is a feed part, 6041 is a first outer shell, 6042 is a first inner shell, 605 is a discharge part, 6051 is a second outer shell, 606 is a discharge pipe, 607 is a control valve, 608 is an adsorbent filling hopper, 609 is a first screen, 610 is a second screen, 611 is a partition plate, 6111 is a first partition plate, 6112 is a second partition plate, 612 is a partition chamber, 613 is a flue gas channel, 614 is an adsorbent discharge hopper, and 70 is a regeneration tower. DETAILED DESCRIPTION

[0030] To facilitate understanding of the present invention, the present invention will be described more fully below with reference to the accompanying drawings. Preferred embodiments of the present invention are shown in the accompanying drawings. However, the present invention may be implemented in many different forms and is not limited to the embodiments described herein. Rather, these embodiments are provided to provide a more thorough and comprehensive understanding of the present disclosure.

[0031] It should be noted that when an element is referred to as being “fixed to” another element, it may be directly on the other element or there may be an intermediate element. When an element is referred to as being “connected to” another element, it may be directly connected to the other element or there may be an intermediate element.

[0032] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by those skilled in the art of the present invention. The terms used in this specification of the present invention are only for the purpose of describing specific embodiments and are not intended to limit the present invention.

[0033] In the present invention, descriptions such as "first", "second", "third", etc. are only used for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of the indicated technical features.

[0034] In the description of the present invention, the terms "upper", "lower", "top", "bottom", "inside", "outside", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings. They are only for the convenience of describing the present invention and simplifying the description. They do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operate in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0035] Please refer to Figures 1 and 4, which are a denitration process for industrial waste gas provided by a first embodiment of the present invention. Please refer to Figure 1, which is a flow chart of a denitration process for industrial waste gas provided by an embodiment of the present invention. Please refer to Figure 2, which is a schematic diagram of a denitration system for industrial waste gas provided by an embodiment of the present invention. Specifically, the process includes: step S1, discharging the industrial waste gas in the boiler and passing it into a precooler, wherein the precooler cools the temperature of the industrial waste gas to below 80°C; step S2, reacting the ozone in the ozone generator with the nitric oxide in the cooled industrial waste gas to generate high-valent nitrogen oxides, and the molar ratio of nitric oxide to ozone in the ozone generator is 1:1-1:2; step S3, passing the high-valent nitrogen oxides and the cooled industrial waste gas into an adsorption tower, the adsorbent in the adsorption tower adsorbs the oxidized industrial waste gas, and the treated clean gas is discharged from the adsorption tower.

[0036] In an embodiment of the present invention, the molar ratio of nitric oxide to ozone in the ozone generator 50 is controlled between 1:1 and 1:2. An appropriate excess of ozone can inhibit the disproportionation reaction of the adsorbent during the adsorption of nitrogen dioxide, and can also maximize the savings in ozone dosage, thereby preventing ozone waste.

[0037] As a further preferred embodiment, in step S2, the content of nitric oxide in the cooled industrial waste gas is monitored by a nitric oxide concentration sensor, and the molar ratio of nitric oxide to ozone in the ozone generator 50 is controlled to be 1:1-1:2 according to the monitored nitric oxide content. A solenoid valve 51 is provided on the air outlet pipe of the ozone generator 50, and a nitric oxide concentration sensor 52 is provided at the air inlet end of the adsorption tower 60. The nitric oxide concentration sensor 52 is used to monitor the concentration of nitric oxide in the industrial waste gas at the air inlet end of the adsorption tower 60. The ozone generator 50 then controls the opening of the solenoid valve 51 so that the molar ratio of nitric oxide to ozone in the ozone generator 50 is 1:1-1:2, and the ozone is kept moderate to suppress the occurrence of the disproportionation reaction.

[0038] Specifically, in the ozone generator 50, the raw materials of the ozone generator 50 can be air, oxygen or liquid oxygen. Ozone is used to oxidize nitrogen monoxide into high-valent nitrogen oxides that are easily adsorbed by the adsorbent. The adsorption tower 60 is used for countercurrent contact or cross-current contact between industrial waste gas and the adsorbent. The adsorbent is fed into the adsorption tower 60 from the feed part 604 at the top of the adsorption tower and discharged from the discharge part 605 at the bottom of the adsorption tower 60.

[0039] As a further preference, in step S3, the adsorbent is ZSM-5 molecular sieve or 13X molecular sieve or other zeolite molecular sieves. In an embodiment of the present invention, the adsorbent in the adsorption tower 60 uses molecular sieve to adsorb high-valent nitrogen oxides after oxidation treatment in industrial waste gas. The molecular sieve has a strong nitrogen oxide adsorption capacity, but has no reducing ability and will not reduce ozone. Therefore, it is beneficial to maintain an appropriate amount of ozone in the adsorption tower 60 to inhibit the occurrence of disproportionation reaction. In addition, in an embodiment of the present invention, the adsorption temperature of the adsorbent is relatively high, and no additional cooling process is required, which saves energy consumption.

[0040] In an embodiment of the present invention, the adsorption tower 60 is a fixed bed adsorption tower or a moving bed adsorption tower. In the fixed bed adsorption tower, the adsorbent is fixed in the adsorption tower 60 for reaction, while in the moving bed adsorption tower, the adsorbent flows and reacts in the adsorption tower 60. When the adsorbent in the adsorption tower is regenerated after adsorbing nitrogen oxides, if a fixed bed adsorption tower is used, heating regeneration is performed in the fixed bed adsorption tower 60; if a moving bed adsorption tower is used, the adsorbent in the moving bed adsorption tower is moved to the regeneration tower 70 for heating regeneration.

[0041] In an embodiment of the present invention, please refer to FIG3, which is a structural example diagram of an adsorption tower provided in an embodiment of the present invention. The adsorption tower 60 includes: an industrial waste gas inlet 601, an exhaust gas outlet 602, a packing portion 603, at least two feed portions 604 provided at the upper end of the packing portion 603, and at least two discharge portions 605 provided at the lower end of the packing portion 603. In an embodiment of the present invention, in order to make the feeding of the feed portion 604 and the discharging of the discharge portion 605 more efficient, the feed portion 604 and the discharge portion 605 are connected. 05 can be arranged at opposite ends of the filling part 603, and the dropping path formed between the feeding part 604 and the discharging part 605 can be designed to be in a vertical direction, so that the feeding part 604 does not need external force when feeding and the discharging part 605 does not need external force when discharging, and feeding and discharging can be achieved only by gravity. In addition, in an embodiment of the present invention, at least two discharging parts 605 are provided, which prevents the occurrence of a situation where the adsorbent cannot be discharged due to local jamming, thereby improving the operating stability of the adsorption tower 60.

[0042] In an embodiment of the present invention, a discharge pipe 606 is provided at the bottom of the discharge section 605, and a control valve 607 is provided on the discharge pipe 606. During use, industrial waste gas enters the adsorption tower 60 and flows from bottom to top in the adsorption tower 60. The adsorbent is filled from top to bottom into the packing section 603 in the feed section 604. The industrial waste gas and the adsorbent flow in the opposite direction, thereby improving the contact effect between the adsorbent and the industrial waste gas and improving the adsorption efficiency of the adsorbent for nitrogen oxides in the industrial waste gas. The adsorbent falls from the packing section 603 to the bottom of the adsorption tower 60 and is deposited in the discharge section 605. After the adsorbent is saturated with adsorption, the control valve 607 is opened to discharge the adsorbent adsorbed with nitrogen oxides through the discharge pipe 606; the industrial waste gas after adsorption is discharged from the tail gas outlet 602.

[0043] In an embodiment of the present invention, the feed portion 604 includes a first outer shell 6041 in the shape of a square cone and a first inner shell 6042 in the shape of a cone. The first inner shell 6042 is an adsorbent filling hopper 608. The discharge portion 605 includes a second outer shell 6051 in the shape of a cone and a second inner shell (not shown in the figure). The second inner shell is an adsorbent discharge hopper 614. The adsorbent filling hopper 608 disperses and stacks the adsorbent into several small piles, and adopts the form of dispersed stacking for distribution, reduces the volume of useless materials, reduces the arrangement of excess adsorbent, and reduces production costs. At the same time, compared with the overall large-volume stacking feeding method, the small-volume dispersed stacking improves the uniformity of adsorbent dispersion, so that the adsorbent is evenly distributed in the filling portion 603, ensuring the stability and uniformity of the adsorbent in adsorbing industrial waste gas.

[0044] In an embodiment of the present invention, a first screen 609 is further provided at one end of the adsorption tower 60 near the discharge portion 605. The industrial waste gas flows horizontally along the first screen 609 and then vertically upward within the adsorption tower 60. After the adsorbent adsorbs nitrogen oxides, it flows vertically downward along the first screen 609. The first screen 609 improves the uniformity of the distribution of the industrial waste gas, ensures sufficient contact between the industrial waste gas and the adsorbent, and thus ensures uniform adsorption of the industrial waste gas by the adsorbent. In addition, a second screen 610 is further provided at one end of the adsorption tower 60 near the feed portion 604. The second screen 610 is an ozone-eliminating carbon layer with activated carbon. The activated carbon filter layer is used to further treat the industrial waste gas adsorbed by the adsorbent to remove any excess ozone that may be present in the exhaust gas.

[0045] Please refer to Figure 4, which is a structural schematic diagram of a partition plate provided in an embodiment of the present invention. In order to improve the distribution uniformity of the adsorbent when entering the adsorption tower 60, the adsorption tower 60 also includes a partition plate 611 axially arranged in the adsorption tower 60, and the partition plate 611 passes through the filler portion 603 and the upper and lower ends extend to the top wall of the flue gas channel 613 and the second screen 610 respectively; the partition plate 611 includes a first partition plate 6111 and a second partition plate 6112 arranged perpendicular to each other, and the first partition plate 6111 and the second partition plate 6112 divide the adsorption tower 60 into a plurality of partition chambers 612. The multiple partition chambers 612 can be arranged symmetrically. Specifically, the number can be set according to the actual amount of flue gas to be adsorbed and treated. For example, in some embodiments, it can be set to 4-16. During use, after the industrial waste gas enters the adsorption tower 60, it fully contacts the adsorbent evenly distributed in the partition chamber 612, and flows from bottom to top along the partition chamber 612, thereby improving the uniformity of the distribution of the industrial waste gas, ensuring full contact between the industrial waste gas and the adsorbent, and further ensuring the uniformity of the adsorption of the industrial waste gas by the adsorbent.

[0046] As a further preferred embodiment, after step S3, the process further includes: step S4, passing the adsorbent after the reaction in step S3 into a regeneration tower, and passing a regeneration heat source into the regeneration tower 70; the regeneration tower 70 decomposes the reacted adsorbent into nitrogen oxides, the regeneration heat source heats and regenerates the reacted adsorbent, and the regenerated adsorbent is passed into the adsorption tower 60 for recycling. In an embodiment of the present invention, the regeneration tower 70 is used to regenerate the adsorbent adsorbed with nitrogen oxides. After treatment in the regeneration tower 70, the adsorbent and nitrogen oxides are separated to obtain nitrogen oxides and regenerated adsorbent.

[0047] Specifically, after the adsorbent in the adsorption tower 60 is passed into the regeneration tower 70, the regeneration tower 70 decomposes the nitrogen oxides from the adsorbed adsorbent. In an embodiment of the present invention, the adsorption-saturated adsorbent in the regeneration tower 70 can be regenerated by heating. The heat source can be steam, high-temperature flue gas, high-temperature air, etc., and the heating method can be direct or indirect heating.

[0048] As a further preferred embodiment, the nitrogen oxides after the analysis treatment are introduced into the boiler 10 and continue to burn until the concentration of nitrogen oxides in the industrial waste gas is balanced. In an embodiment of the present invention, one treatment method for the nitrogen oxides after the analysis treatment is backfire treatment, in which the nitrogen oxides after the analysis treatment are returned to the boiler 10 for further combustion. The nitrogen oxides in the boiler 10 suppress the reaction of O2 and N2 toward the formation of nitrogen oxides through the thermodynamic equilibrium mechanism of the reversible reaction until the concentration of nitrogen oxides in the industrial waste gas increases by a percentage of 6%-12%. Specifically, the equilibrium concentration of nitrogen oxides can be set according to the actual amount of flue gas that needs to be adsorbed and treated. For example, in some embodiments, it can be set to 6%-8%. After the increase, the concentration of nitrogen oxides reaches a basic equilibrium state and will not increase further.

[0049] As a further preferred method, the nitrogen oxides after the decomposition treatment are converted into nitric acid or nitrates. In an embodiment of the present invention, another method for treating the nitrogen oxides after the decomposition treatment is resource utilization, wherein the nitrogen oxides discharged from the regeneration tower 70 are centrally collected to obtain enriched nitrogen oxides, which are further oxidized into products such as nitric acid and nitrates for use.

[0050] As a further preferred embodiment, the boiler 10 is a gas-fired boiler or a non-gas-fired boiler. When the boiler 10 is a gas-fired boiler, the step S1 further includes a step S0 before the processing: passing the industrial waste gas into an air preheater 20, wherein the air preheater 20 performs heat recovery treatment on the industrial waste gas and passes the treated industrial waste gas into a precooler 40. In the embodiment of the present invention, the air preheater 20 is provided between the boiler 10 and the precooler 40, so that the industrial waste gas discharged from the boiler can undergo heat exchange, thereby improving the heat utilization rate in the system.

[0051] As a further preferred embodiment, when the boiler 10 is a non-gas-fired boiler, the passing of the preheated industrial waste gas into the precooler 40 also includes: passing the preheated industrial waste gas into the dust collector 30, the dust collector 30 removes dust from the preheated industrial waste gas, and passing the industrial waste gas after dust removal into the precooler 40.

[0052] The present invention relates to a denitration process for industrial waste gas, comprising: step S1, discharging the industrial waste gas from a boiler and passing it into a precooler, wherein the precooler cools the temperature of the industrial waste gas to below 80°C; step S2, reacting ozone in an ozone generator with nitric oxide in the cooled industrial waste gas to generate high-valent nitrogen oxides, wherein the molar ratio of nitric oxide to ozone in the ozone generator is 1:1-1:2; and step S3, passing the high-valent nitrogen oxides and the cooled industrial waste gas into an adsorption tower, wherein an adsorbent in the adsorption tower adsorbs the oxidized industrial waste gas, and the treated clean gas is discharged from the adsorption tower. In the denitrification process for industrial waste gas described in the present invention, the ozone generated by the ozone generator is used to oxidize the industrial waste gas, and the low-valent nitrogen monoxide is oxidized into high-valent nitrogen oxides. The high-valent nitrogen oxides are more effectively adsorbed by the adsorbent in the adsorption tower. An appropriate excess of ozone can inhibit the disproportionation reaction of the adsorbent during the adsorption of nitrogen dioxide, and at the same time, it can also maximize the savings in the amount of ozone added, thereby preventing ozone waste.

[0053] The technical features of the above embodiments can be combined arbitrarily. To make the description concise, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0054] The above embodiments merely represent preferred embodiments of the present invention. While the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the patent. It should be noted that a person skilled in the art would be able to make various modifications and improvements without departing from the spirit of the present invention, all of which fall within the scope of protection of the present invention. Therefore, the scope of protection of the patent for this invention shall be determined by the appended claims.

Claims

1. A denitrification process for industrial waste gas, It is characterized in that include: Step S1, discharging the industrial waste gas in the boiler (10) and passing it into a precooler (40), wherein the precooler (40) cools the temperature of the industrial waste gas to below 80° C.; Step S2, reacting the ozone in the ozone generator (50) with the nitric oxide in the cooled industrial waste gas to generate high-valent nitrogen oxides, wherein the molar ratio of the nitric oxide to the ozone in the ozone generator (50) is 1:1-1:2; Step S3, introducing the high-valent nitrogen oxides and the cooled industrial waste gas into an adsorption tower (60), wherein the adsorbent in the adsorption tower (60) adsorbs the oxidized industrial waste gas and discharges the treated clean gas from the adsorption tower (60).

2. The denitrification process for industrial waste gas according to claim 1, It is characterized in that In the step S2, the content of nitric oxide in the cooled industrial waste gas is monitored by a nitric oxide concentration sensor (52), and the molar ratio of nitric oxide to ozone in the ozone generator (50) is controlled to be 1:1-1:2 according to the monitored content of nitric oxide.

3. The denitrification process for industrial waste gas according to claim 1, It is characterized in that In the step S3, the adsorbent is ZSM-5 molecular sieve or 13X molecular sieve or other zeolite molecular sieves.

4. The denitrification process for industrial waste gas according to claim 1, It is characterized in that After step S3, the following steps are also included: Step S4, passing the adsorbent after the reaction in step S3 into a regeneration tower, and passing a regeneration heat source into the regeneration tower (70); The regeneration tower (70) resolves the reacted adsorbent into nitrogen oxides, the regeneration heat source heats the reacted adsorbent to regenerate it, and the regenerated adsorbent is introduced into the adsorption tower (60) for recycling.

5. The denitrification process for industrial waste gas according to claim 4, It is characterized in that The nitrogen oxides after the analysis treatment are introduced into the boiler (10) and continue to be burned until the concentration of the nitrogen oxides in the industrial waste gas is balanced.

6. The denitration process for industrial waste gas according to claim 4, It is characterized in that The nitrogen oxides after the analysis process are converted into nitric acid or nitrates.

7. The denitrification process for industrial waste gas according to claim 1, It is characterized in that In step S3, the adsorption tower includes a packing part (603), at least two feed parts (604) arranged at the upper end of the packing part (603), and at least two discharge parts (605) arranged at the lower end of the packing part (603).

8. The denitrification process for industrial waste gas according to claim 7, It is characterized in that The adsorption tower (60) further comprises a partition plate (611) axially arranged inside the adsorption tower (60), wherein the partition plate (611) penetrates the filler portion (603) and the upper and lower ends thereof respectively extend to the top wall of the flue gas channel (613) and the second screen (610); the partition plate (611) comprises a first partition plate (6111) and a second partition plate (6112) which are arranged perpendicular to each other, wherein the first partition plate (6111) and the second partition plate (6112) divide the adsorption tower (60) into a plurality of partition chambers (612).

9. The denitrification process for industrial waste gas according to claim 1, It is characterized in that The step S1 also includes: Step S0: passing the industrial waste gas into an air preheater (20), wherein the air preheater (20) performs heat recovery treatment on the industrial waste gas and passes the treated industrial waste gas into a precooler (40).

10. The denitrification process for industrial waste gas according to claim 9, It is characterized in that When the industrial waste gas is dust-containing flue gas, the step of passing the preheated industrial waste gas into the precooler (40) further comprises: The preheated industrial waste gas is passed into a dust collector (30), the dust collector (30) removes dust from the preheated industrial waste gas, and the industrial waste gas after the dust is removed is passed into a precooler (40).

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