Flue gas low-wind-resistance semi-dry method denitration device of gas turbine unit and application method of flue gas low-wind-resistance semi-dry method denitration device

Abstract

The invention discloses a low-wind-resistance semi-dry-process flue gas denitration device of a gas turbine unit and an application method thereof.The device comprises an absorption structure, the absorption structure comprises a plurality of absorption modules arranged in an array mode, each absorption module comprises adsorption fibers, and the adsorption fibers are in a sheet plate shape and load an alkaline absorption liquid film; the two opposite sides of each adsorption fiber are clamped by two steel mesh structures, and an isolation structure is arranged between the steel mesh structures on the outer sides of the two adjacent adsorption fibers, so that flue gas can conveniently pass through the area between the two adjacent adsorption fibers; two clamped outer fixing structures are arranged on the left side and the right side of the outermost part of the absorption module and used for clamping and fixing all parts of the absorption module; a smoke inlet and a smoke outlet are formed in the left side and the right side of the absorption box body respectively, and the circulation direction of smoke in the absorption box body is parallel to the surfaces of the adsorption fibers of the absorption modules. The device can perform low-pressure-drop efficient removal on NOx components in high-air-volume flue gas of the gas turbine unit, and the absorbent can be leached and regenerated through an absorption liquid wet method.

Description

Technical Field

[0001] The present invention relates to the technical field of nitrogen oxide treatment, and in particular to a low-wind resistance semi-dry denitration device for flue gas of a gas-fired unit and an application method thereof. Background Art

[0002] Nitrogen oxides (NO x ) Waste gas is one of the main pollutants of air pollution, which can cause acid rain and photochemical smog, causing varying degrees of harm to human health and the living environment. In order to reduce air pollution, China has issued and implemented the control of NO x Relevant policies and standards for pollutant emissions, for NO x The emission requirements are becoming more and more stringent. According to the "Stationary Internal Combustion Engine Air Pollutant Emission Standard (Draft for Comments)" issued by the Zhejiang Provincial Department of Ecology and Environment, a higher standard for the emission limits of air pollutants from stationary gas turbines has been proposed. For existing stationary gas turbines, the nitrogen oxide emission limit is 50mg / m 3 (measured in NO2); For newly built stationary gas turbines, the nitrogen oxide emission limit is 30mg / m 3 (measured in NO2). Therefore, it is necessary to efficiently denitrify the nitrogen oxide waste gas in industry, which is of great significance to improving environmental quality and practicing the concept of green development.

[0003] Existing denitrification technologies are mainly divided into dry and wet methods.

[0004] The dry process includes selective catalytic reduction (SCR) and selective non-catalytic reduction (SNCR). The denitrification of newly built gas-fired units is mainly based on SCR technology, but it is mainly used to solve the NO in the stable stage. x However, during the startup phase, the flue gas temperature is low and the denitrification efficiency is low. More importantly, during the startup phase, the NO x The concentration fluctuation is very large, and SCR ammonia spraying denitrification will cause a large amount of ammonia leakage, leading to secondary pollution. In addition, the SCR device is large in size, and the gas boilers currently in operation rarely have the conditions for transformation and cannot be applied.

[0005] Wet methods include alkaline solution absorption, acid absorption, complex absorption, reduction absorption and oxidation absorption, etc., which mainly achieve absorption by passing the gas through an adsorption layer containing an absorption solution or spraying an absorption solution. These methods have been used in the field of industrial denitrification. However, the flue gas volume of gas units is very large (more than 1 million m 3 / h). If the design in which the gas passes through the adsorption layer is adopted, the pressure drop will be too large, thus causing the problem of airflow blockage; if the design in which the gas does not pass through the adsorption layer is adopted, the absorption efficiency will be greatly reduced. In addition, the liquid droplets produced by the spraying are easily carried away by the high-volume and high-temperature flue gas, resulting in the waste of the absorption liquid and causing new environmental air pollution. Therefore, the flue gas emitted during the startup phase of the existing gas-fired units, especially how to improve the absorption efficiency under low pressure drop, is a key problem in the absorption of denitrification equipment. It cannot meet the latest emission standards, and it is urgent to develop a new denitrification device to achieve ultra-low emissions from gas-fired units.

[0006] In summary, in order to focus on solving the problem of large pressure drop in the denitrification device, this patent application has developed an array absorption structure for the denitrification device. The absorption modules are discharged through the array. There is a certain gap inside the absorption module, and there is also a certain gap between the absorption modules. The absorption liquid film is loaded on the absorption fiber. At a relatively low temperature (50-160°C), it is used to absorb NO in the flue gas. x Absorption of ingredients.

[0007] Compared with dry SCR, the method of the present invention greatly reduces the flue gas temperature required for absorption. Compared with wet traditional fixed bed absorption denitrification, there is no problem of large pressure drop and low absorption efficiency. Compared with wet spray denitrification, there is no waste and environmental pollution caused by the absorption liquid being taken away. Through multiple absorption modules arranged in an array, the low pressure drop and high efficiency denitrification requirements of the gas unit can be met, and in-situ regeneration can be performed through the regeneration device to achieve NO in the high air volume flue gas of the gas unit. x Long-term stable and efficient removal of components. Summary of the invention

[0008] In view of the above technical problems existing in the prior art, the purpose of this application is to provide a low-wind resistance semi-dry denitrification device for flue gas of a gas unit and its application method, and to achieve the goal of low pressure drop and high efficiency through an array-type discharge absorption structure in view of the problem of taking into account both wind resistance and absorption efficiency during the high air volume operation of the gas unit, so as to realize the long-term stable operation of the denitrification device and the denitrification of NO in the flue gas. x Efficient removal of components.

[0009] The technical solution adopted by the present invention is as follows:

[0010] The low-drag semi-dry denitrification device for flue gas of a gas-fired unit comprises an absorption box, an absorption structure is arranged inside the absorption box, the absorption structure comprises a plurality of absorption modules arranged in an array, the absorption module comprises a plurality of parallel and vertically arranged adsorption fibers, the adsorption fibers are in the form of sheets and are evenly loaded with alkaline absorption liquid films, the opposite sides of each adsorption fiber are clamped by two steel mesh structures to provide rigid support, an isolation structure is arranged between the steel mesh structures on the outsides of two adjacent adsorption fibers, the isolation structure is used to artificially provide a flue gas channel, reduce pressure loss, and facilitate the passage of flue gas in the area between two adjacent adsorption fibers; a flue gas inlet and a flue gas outlet are respectively arranged on the left and right sides of the absorption box, air pressure sensors are arranged at the flue gas inlet and the flue gas outlet, and the flow direction of the flue gas in the absorption box is parallel to the surface of the adsorption fiber of the absorption module.

[0011] In the present invention, the outer side of the adsorption fiber is clamped by a steel mesh structure, and the mesh structure can reduce the resistance generated by its own structure and provide a smoke absorption contact surface to meet the requirements of low pressure drop and high efficiency absorption.

[0012] Two clamping external fixing structures are arranged on the left and right sides of the outermost part of the absorption module. The external fixing structure is a frame structure with screw holes around it. Bolts and nuts are installed in the screw holes to fasten the whole. After the various components of the absorption module are placed between the two external fixing structures, the screw holes of the two external fixing structures are aligned, and then bolts are inserted and tightened with nuts to clamp and fix the various components of the absorption module. The adsorption fiber is fixed by a steel mesh structure and placed in the external fixing structure; the isolation structure is placed between adjacent steel mesh structures.

[0013] In the low-drag semi-dry denitrification device for flue gas of a gas-fired unit, each absorption module is installed inside the absorption box through a positioning structure, and the positioning structure includes a pair of symmetrical rectangular straight plates fixedly arranged inside the upper end of the absorption box, and a pair of symmetrical L-shaped plates fixedly arranged inside the lower end of the absorption box, the L-shaped openings of the pair of L-shaped plates are opposite and upward, and a module installation space is formed between the pair of rectangular straight plates and the pair of L-shaped plates, and the absorption module is placed and installed in the module installation space, and there is a gap between adjacent positioning structures.

[0014] In the low-wind resistance semi-dry denitration device for flue gas of a gas-fired unit, the spacing between adjacent positioning structures in the same absorption structure is 5-15 mm, preferably 5-10 mm.

[0015] The low-resistance semi-dry denitrification device for flue gas of a gas-fired unit has at least two groups of absorption structures arranged at intervals along the direction of flue gas flow, and the flue gas channels between two adjacent groups of absorption structures are staggered to increase the disturbance of the airflow by the absorption module, so that the flue gas passes through the surface of the adsorption fiber in parallel to improve the absorption efficiency.

[0016] In the low-resistance semi-dry denitration device for flue gas of a gas-fired unit, a flow equalizer is arranged inside the absorption box near the flue gas inlet. After passing through the flow equalizer, the incoming flue gas can pass through the absorption structure evenly, thereby improving the utilization rate of each part of the absorbent.

[0017] Furthermore, water mist is sprayed at the air inlet of the absorption device. This operation can make the liquid film on the surface of the absorption fiber continue to exist, maintain high absorption efficiency, and reduce the generation of NO.

[0018] In the low-drag semi-dry denitrification device for flue gas of a gas-fired unit, a plurality of parallel-arranged sprinkling storage tanks are provided on the top of the absorption box at the corresponding position of the absorption structure, and a plurality of evenly arranged sprinkling holes are provided on the top wall of the absorption box in the sprinkling storage tank. A liquid level of a certain height can be formed in the sprinkling storage tank to ensure uniform liquid discharge from each sprinkling hole, and the sprinkling hole is correspondingly provided at the position directly above each adsorption fiber. After the lean washing liquid, rich liquid or clean water is passed into the sprinkling storage tank, it can be dripped along the sprinkling hole onto the adsorption fiber of the absorption module, so that the adsorption fiber is fully and evenly loaded with alkaline absorption liquid or cleaned and regenerated.

[0019] In the low-wind resistance semi-dry denitration device for flue gas of a gas-fired unit, a liquid receiving tank is provided at the bottom of the absorption box directly below each absorption structure, and a liquid outlet is provided at the bottom of the liquid receiving tank. Two liquid outlets are provided, each connected to a liquid receiving tank, to prevent the problem of gas short-circuiting in which the gas directly passes through the liquid receiving tank and hardly passes through the absorption mechanism.

[0020] The application method of the low wind resistance semi-dry denitrification device for flue gas of a gas generator set is to spray water mist containing NO at the flue gas inlet of the absorption box. x Flue gas moisture is introduced into the flue gas inlet of the absorption box, and O3 is also introduced into the flue gas inlet to absorb NO x NO in the flue gas is oxidized to NO2 (the alkaline absorption liquid film on the adsorption fiber can also absorb part of NO). When passing through the absorption mechanism, the flue gas passes parallel to the surface of the adsorption fiber to absorb NO. x The smoke is removed and discharged from the smoke outlet of the absorption box after treatment; the residence time of the smoke in the absorption mechanism is 0.5-1.5s.

[0021] Furthermore, NO x The inlet temperature of the flue gas is 80-150°C, preferably 100°C±20°C, and the moisture content in the raw gas is 80%-100% relative humidity.

[0022] Furthermore, during operation, the pressure drop of the absorption box ranges from 50-150Pa.

[0023] The present invention uses the above-mentioned array type semi-dry solid adsorbent absorption device to achieve low pressure drop of NO in the denitration device.x The components are removed efficiently, and wet in-situ regeneration is carried out through the regeneration device to achieve NO x The components can be removed stably and efficiently for a long time to meet the existing environmental emission requirements.

[0024] Compared with the prior art, the present invention has the following advantages:

[0025] 1. The present invention can reduce NO under high air volume conditions of gas units. x Efficient removal of components;

[0026] 2. The present invention provides a flue gas channel through an array-type emission absorption module, which reduces the pressure loss in exchange for a decrease in absorption efficiency within an acceptable range, thereby achieving the effect of low wind resistance and high efficiency.

[0027] 3. The array absorption module of the present invention is not completely fixed, but adopts a movable pull-out structure, which is easy to replace and reduces parking time.

[0028] 4. The absorption efficiency of the present invention decreases slowly with the increase of the running time, and the mass of the alkali solution loaded by the unit mass of the absorption fiber is large, and the absorption capacity is large. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] Figure 1 It is a schematic diagram of a flue gas low wind resistance semi-dry denitrification device for a gas unit;

[0030] Figure 2 It is a side cross-sectional view of the device of the present invention.

[0031] Figure 3 It is a three-dimensional schematic diagram of a partial absorption structure of the device of the present invention;

[0032] Figure 4 A flowchart illustrating the process of the device of the present invention in actual use;

[0033] Figure 5 is a schematic diagram of the absorption module structure;

[0034] In the figure: 1. Smoke inlet, 2. Absorption box, 3. Sprinkling liquid storage tank, 4. Sprinkling liquid hole, 5. Smoke outlet, 6. Liquid receiving tank, 7. Absorption mechanism, 8. Flow equalizing plate, 9. Liquid outlet, 10. L-shaped plate, 11. External fixing structure, 12. Steel mesh structure, 13. Adsorption fiber, 14. Isolation structure, 15. Rectangular straight plate. DETAILED DESCRIPTION

[0035] The present invention will be further described below in conjunction with specific embodiments, but the protection scope of the present invention is not limited thereto.

[0036] As attached Figure 1-2As shown, this patent application provides a low-wind resistance semi-dry denitrification device for flue gas of a gas unit, and realizes the removal of NO in dusty flue gas through wet in-situ regeneration. x The device can remove the components stably and efficiently for a long time.

[0037] The present application discloses a low-wind resistance flue gas low-temperature semi-dry denitration device, comprising an absorption box 2, an absorption structure 7 is arranged inside the absorption box 2, the absorption structure 7 comprises a plurality of absorption modules arranged in an array, the absorption module comprises a plurality of parallel and vertically arranged absorption fibers 13, the absorption fibers 13 are in the shape of sheets and are evenly loaded with alkaline absorption liquid films, the opposite sides of each absorption fiber are clamped by two steel mesh structures 12 to provide rigid support, an isolation structure 14 is arranged between the steel mesh structures 12 outside two adjacent absorption fibers 13, the isolation structure 14 is used to artificially provide a flue gas channel, reduce pressure loss, and facilitate the passage of flue gas in the area between two adjacent absorption fibers 13; two clamping external fixing structures 11 are arranged on the outermost left and right sides of the absorption module, which are used to clamp and fix the various components of the absorption module; a flue gas inlet 1 and a flue gas outlet 5 are respectively arranged on the left and right sides of the absorption box 2, and air pressure sensors are arranged at the flue gas inlet and the flue gas outlet, and the flow direction of the flue gas in the absorption box 2 is parallel to the surface of the absorption fiber 13 of the absorption module.

[0038] Each absorption module is installed inside the absorption box 2 through a positioning structure, and the positioning structure includes a pair of symmetrical rectangular straight plates 15 fixedly arranged inside the upper end of the absorption box, and a pair of symmetrical L-shaped plates 10 fixedly arranged inside the lower end of the absorption box, the L-shaped openings of the pair of L-shaped plates 10 are opposite and upward, and a module installation space is formed between the pair of rectangular straight plates 15 and the pair of L-shaped plates 10. The absorption module is placed and installed in the module installation space, and there is a gap between adjacent positioning structures.

[0039] The spacing between adjacent positioning structures in the same absorbent structure is 5-15 mm.

[0040] Comparison Figure 1-2 Along the direction of smoke flow, the absorption structures 7 are arranged in two groups at intervals, and the smoke channels between two adjacent groups of absorption structures are staggered to increase the disturbance of the airflow by the absorption module, so that the smoke passes through the surface of the adsorption fiber 13 in parallel, thereby improving the absorption efficiency.

[0041] A flow equalizing plate 8 is provided inside the absorption box 2 near the smoke inlet 1, and the incoming smoke can pass through the absorption structure evenly after passing through the flow equalizing plate 8.

[0042] The top of the absorption box 2 at the corresponding position of the absorption structure is provided with a plurality of parallel arranged drip storage tanks 3, and the top wall of the absorption box 2 in the drip storage tank 3 is provided with a plurality of evenly arranged drip holes 4. A certain height of liquid level can be formed in the drip storage tank 3, so as to ensure that the liquid discharge from each drip hole is uniform. The drip hole 4 is correspondingly provided at the position directly above each adsorption fiber. After the lean washing liquid, rich liquid or clean water is passed into the drip storage tank 3, it can drip along the drip hole 4 onto the adsorption fiber of the absorption module, so that the adsorption fiber is fully and evenly loaded with alkaline absorption liquid or cleaned and regenerated. A liquid receiving tank 6 is provided at the bottom of the absorption box 2 directly below each absorption structure, and a liquid outlet 9 is provided at the bottom of the liquid receiving tank.

[0043] Embodiment 1:

[0044] The structure of a low-wind resistance flue gas low-temperature semi-dry denitrification device is as follows Figure 1-3 and Figure 5 As shown, the flowchart of the device of the present invention in actual use is shown in Figure 4 .

[0045] In this embodiment, the absorbent used includes an adsorption carrier and an alkaline absorption liquid for denitrification loaded on the adsorption carrier. The absorption fiber in the absorbent bed is an activated carbon fiber. The alkaline absorption liquid is stored in the absorption liquid lean liquid storage tank. The alkaline absorption liquid is extracted by a liquid pump and eluted and loaded onto the absorption carrier. After the elution and loading are completed, the absorbent has a NO x The absorption capacity is used to absorb NO in dusty flue gas. x Element.

[0046] In this embodiment, the alkaline absorption liquid is eluted and loaded onto the absorption carrier, and the excess alkaline absorption liquid passes through the liquid receiving tank 6 of the liquid recovery mechanism, is collected from the liquid outlet 9, and is recycled for reuse, thereby achieving the purpose of efficient utilization of the absorption liquid.

[0047] In this embodiment, O3 is also introduced into the flue gas inlet to oxidize NO to NO2, and the amount of O3 introduced is controlled to be 25 mg / m 3 .

[0048] In this embodiment, the distance between adjacent positioning structures is 6 mm.

[0049] In this embodiment, a water mist nozzle is provided at the smoke inlet to keep the relative humidity of the smoke at 80%-90%.

[0050] In this embodiment, for the flue gas denitrification absorption test, the flue gas intake air volume is 10000m 3 / h, the absorption liquid solid carrier has a specific surface area of ​​2000cm 3 / g activated carbon fiber, with an absorption area of ​​200m 2The alkaline absorption liquid is a 10wt% NaOH aqueous solution. The alkaline absorption liquid is eluted on the activated carbon fiber. After the loading is completed, the adsorbent is obtained. The loading amount of the alkaline absorption liquid is 11 times the weight of the activated carbon fiber, and the flue gas residence time is 0.9s.

[0051]

[0052] η: Absorption efficiency (%), C in : Inlet NO measured at the flue inlet x Concentration (mg / m 3 ), C out : Imported NO measured at the flue outlet x Concentration (mg / m 3 ).

[0053] In this embodiment, the smoke outlet of the absorption box 2 is provided with a NO2 concentration detection device. When the emission value is higher than 10 mg / m 3 When the absorbent is deactivated, it is recorded as absorption inactivation, and the absorbent needs to be wet-regenerated in situ. The wet-regeneration in situ includes two parts: cleaning the absorbent (i.e., first rinsing the adsorption fiber with clean water) and regeneration with alkaline solution load (i.e., dripping alkaline absorption liquid on the adsorption fiber again).

[0054] According to the above experimental method, the test results are summarized in Table 1 and Table 2. The pressure drop in Table 1 corresponds to the pressure drop between the flue gas inlet and the flue gas outlet of the absorption box at the peak moment of the inlet NOx concentration during the startup phase. The deactivation absorption time in Table 2 refers to the time from the start of flue gas introduction until the NO2 concentration emission value detected at the flue gas outlet is higher than 10mg / m 3 The total time consumed.

[0055] Table 1

[0056]

[0057] Table 2

[0058]

[0059] Absorption stage, at 10000m 3 / h of air volume, it can meet more than 80% denitrification efficiency. After wet in-situ regeneration, the concentration of the obtained nitrate aqueous solution is >10g / L, which has utilization value. After regeneration, the absorption performance does not decay during the 9 cycles of absorption, which meets the denitrification requirements of the gas unit.

[0060] Comparative Example 1:

[0061] The experimental process of comparative example 1 is repeated in Example 1, the only difference being that “water mist spraying is not performed at the smoke inlet of comparative example 1”, and the other conditions remain unchanged. The experimental results are shown in Table 3.

[0062] Table 3

[0063]

[0064] In summary, this patent provides a method for removing NO in high-volume flue gas by using an array-type semi-dry solid adsorbent absorption device and wet in-situ regeneration. x The device can effectively reduce the pressure drop of the device during the actual use cycle, and the NO in the flue gas after denitrification can be effectively reduced. x The ingredients meet existing emission requirements and are very promising in denitrification.

[0065] The contents described in this specification are merely an enumeration of implementation forms of the inventive concept, and the protection scope of the present invention should not be regarded as being limited to the specific forms described in the embodiments.

Claims

1. A low-wind resistance semi-dry denitrification device for flue gas of a gas-fired unit, characterized in that The invention comprises an absorption box (2), wherein an absorption structure is arranged inside the absorption box (2), wherein the absorption structure comprises a plurality of absorption modules arranged in an array, wherein the absorption modules comprise a plurality of absorption fibers (13) arranged in parallel and vertically, wherein the absorption fibers (13) are in the form of sheets and evenly load an alkaline absorption liquid film, wherein two opposite sides of each absorption fiber are clamped by two steel mesh structures (12) to provide rigid support, and an isolation structure (14) is arranged between the steel mesh structures (12) outside two adjacent absorption fibers (13), wherein the isolation structure (14) is used to artificially provide a smoke passage, reduce pressure loss, and facilitate the passage of smoke through the area between two adjacent absorption fibers (13); two clamping external fixing structures (11) are arranged on the outermost left and right sides of the absorption module, and are used to clamp and fix various components of the absorption module; a smoke inlet (1) and a smoke outlet (5) are arranged on the left and right sides of the absorption box (2), respectively, and the flow direction of the smoke in the absorption box (2) is parallel to the surface of the absorption fiber (13) of the absorption module.

2. A low-wind resistance semi-dry denitration device for flue gas of a gas-fired unit as claimed in claim 1, characterized in that Each absorption module is installed inside the absorption box (2) via a positioning structure, the positioning structure comprising a pair of symmetrical rectangular straight plates (15) fixedly arranged inside the upper end of the absorption box, and a pair of symmetrical L-shaped plates (10) fixedly arranged inside the lower end of the absorption box, the L-shaped openings of the pair of L-shaped plates (10) facing each other and facing upwards, a module installation space is formed between the pair of rectangular straight plates (15) and the pair of L-shaped plates (10), the absorption module is placed and installed in the module installation space, and there is a gap between adjacent positioning structures.

3. A low-wind resistance semi-dry denitration device for flue gas of a gas-fired unit as claimed in claim 2, characterized in that The spacing between adjacent positioning structures in the same absorbent structure is 5-15 mm, preferably 5-10 mm.

4. A low-wind resistance semi-dry denitration device for flue gas of a gas-fired unit as claimed in claim 1, characterized in that Along the direction of smoke flow, the number of the absorption structures is at least two groups and they are arranged at intervals, and the smoke passages between two adjacent groups of absorption structures are staggered to increase the disturbance of the airflow by the absorption module, so that the smoke passes through the surface of the absorption fiber (13) in parallel, thereby improving the absorption efficiency.

5. A low-wind resistance semi-dry denitration device for flue gas of a gas-fired unit as claimed in claim 1, characterized in that A flow equalizing plate (8) is arranged inside the absorption box (2) near the smoke inlet (1), and the incoming smoke can pass through the absorption structure evenly after passing through the flow equalizing plate (8).

6. A low-wind resistance semi-dry denitration device for flue gas of a gas-fired unit as claimed in claim 1, characterized in that A plurality of parallel-arranged drip storage tanks (3) are provided on the top of the absorption box (2) at the corresponding position of the absorption structure, and a plurality of evenly-arranged drip holes (4) are provided on the top wall of the absorption box (2) in the drip storage tank (3). A liquid level of a certain height can be formed in the drip storage tank (3), thereby ensuring that the liquid discharge from each drip hole is uniform. The drip hole (4) is provided correspondingly at the position directly above each adsorption fiber. After the lean liquid, rich liquid or clean water is introduced into the drip storage tank (3), it can drip along the drip hole (4) onto the adsorption fiber of the absorption module, so that the adsorption fiber is fully and evenly loaded with the alkaline absorption liquid or cleaned and regenerated.

7. A low-wind resistance semi-dry denitration device for flue gas of a gas-fired unit as claimed in claim 1, characterized in that A liquid receiving groove (6) is provided at the bottom of the absorption box (2) directly below each absorption structure, and a liquid outlet (9) is provided at the bottom of the liquid receiving groove.

8. The application method of the low-wind resistance semi-dry denitration device for flue gas of a gas generator set as claimed in claim 1, characterized in that Spray water mist containing NO at the flue gas inlet (1) of the absorption box (2). x Flue gas moisture is introduced into the flue gas inlet (1) of the absorption box (2), and O3 is also introduced into the flue gas inlet to absorb NO x NO in the flue gas is oxidized to NO2. When passing through the absorption mechanism, the flue gas passes parallel to the surface of the adsorption fiber (13) to absorb NO. x After removal, the treated flue gas is discharged from the flue gas outlet (5) of the absorption box (2); the residence time of the flue gas in the absorption mechanism is 0.5-1.5 seconds.

9. The application method of the low-wind resistance semi-dry denitration device for flue gas of a gas generator set as claimed in claim 8, characterized in that The inlet temperature of the raw gas is 80-150°C, preferably 100°C±20°C, and the moisture content in the raw gas is 80%-100% relative humidity.

10. The application method of the low-wind resistance semi-dry denitration device for flue gas of a gas generator set as claimed in claim 8, characterized in that During operation, the pressure drop of the absorption box (2) ranges from 50 to 150 Pa.

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