A dry desulfurization device and method based on multi-stage reinforced disturbance

Abstract

The present application relates to waste gas treatment technical field, disclose a kind of dry desulfurization equipment based on multistage enhanced disturbance, including desulfurization tower, the bottom of desulfurization tower is equipped with gas inlet, the top of desulfurization tower is equipped with gas outlet, desulfurization tower is sequentially arranged with first disturbance zone, second disturbance zone and third disturbance zone from below to top along flue gas flow direction, first disturbance zone includes spiral distributor fixedly installed in desulfurization tower, the top of spiral distributor is fixedly connected with feed pipe, and spiral distributor is communicated with feed pipe when spiral distributor rotates.The device compared with the circulating fluidized bed tower body in prior art, small, investment cost is small, construction time is short, for the engineering project of urgently needed flue gas treatment has stronger adaptability, and the utilization efficiency of desulfurizer is higher.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of waste gas treatment, in particular to a dry desulfurization equipment and method based on multi-stage reinforced disturbance. BACKGROUND

[0002] With the increasingly stringent environmental requirements, flue gas desulfurization technology has become an important link in industrial waste gas treatment. Dry desulfurization technology gradually attracts attention due to its advantages such as no wastewater discharge, simple equipment, low operation cost, etc. However, in the field of large air volume and energy saving and consumption reduction, the existing dry desulfurization technology still has problems such as low utilization rate of desulfurization agent, large bed resistance, unstable desulfurization efficiency, etc. Specifically, the traditional dry desulfurization (such as flue gas calcium powder injection, simple fluidized bed, circulating fluidized bed, etc.) in the prior art has problems such as low utilization rate of desulfurization reaction agent (usually only 25%-70% of the desulfurization reaction agent), limited desulfurization efficiency, high equipment cost, large occupied area, large system pressure drop, etc., and single disturbance mode (such as fluidized bed, gas flow bed, mechanical stirring) is difficult to realize sufficient contact between the reaction agent and the flue gas, and at the same time, only relying on air flow disturbance does not solve the problem of reaction agent sticking to the wall. The circulating fluidized bed using a Venturi has strict requirements on the flow field and requires a large amount of flue gas. Only in a specific flue gas amount can a fluidized bed be formed. If the flue gas amount is exceeded or below, the bed will collapse and the reaction will not be effective. Moreover, the circulating fluidized bed tower body height is more than 40 meters, the volume is large, and the investment cost is large. Therefore, the prior art urgently needs a technical solution to solve the above problems. SUMMARY

[0003] The purpose of the present application is to provide a dry desulfurization equipment and method based on multi-stage reinforced disturbance to solve the problems raised in the background art.

[0004] To solve the above technical problems, the technical solution adopted by the present application is:

[0005] A dry desulfurization equipment based on multi-stage reinforced disturbance, comprising a desulfurization tower, a gas inlet is formed in the bottom of the desulfurization tower, a gas outlet is formed in the top of the desulfurization tower, a first disturbance zone, a second disturbance zone and a third disturbance zone are sequentially arranged in the desulfurization tower from bottom to top along the flue gas flow direction.

[0006] The first disturbance zone comprises a spiral distributor fixedly installed in the desulfurization tower, the top of the spiral distributor is fixedly connected with a feeding pipe, and the spiral distributor and the feeding pipe are in communication with each other when the spiral distributor rotates.

[0007] Further improvement of the technical scheme of the present application is that the spiral distributor comprises a support fixedly installed in the desulfurization tower, a hollow pipe is fixedly connected to the support, the top of the hollow pipe is fixedly connected with the bottom of the feed pipe, the hollow pipe is communicated with the feed pipe, a rotating shaft is rotatably connected to the outside of the hollow pipe, a plurality of fan blades are fixedly connected to the outside of the rotating shaft, a porous pipe is fixedly connected to the side wall of each fan blade, a plurality of perforations are formed in the side wall of the rotating shaft, a plurality of discharge holes are formed in the side wall of the hollow pipe, one end of each perforation is communicated with the porous pipe, and the other end is communicated with the discharge hole, and a driving device for driving the rotating shaft to rotate is fixedly connected to the bottom of the support.

[0008] Further improvement of the technical scheme of the present application is that a plurality of knocking hammers are rotatably installed above the spiral distributor on the inner wall of the desulfurization tower, the knocking hammer comprises a hammer rod rotatably connected with the inner wall of the desulfurization tower, first and second rubber hammer heads are fixedly connected to the two ends of the hammer rod respectively, and an inclined chute for avoiding the hammer rod is formed in the inner wall and the outer wall of the desulfurization tower.

[0009] Further improvement of the technical scheme of the present application is that all the fan blades are arranged in an inclined manner, and all the porous pipes are located on the upper surface of the fan blades.

[0010] Further improvement of the technical scheme of the present application is that the secondary disturbance zone comprises a fixed ring fixedly installed in the desulfurization tower, a plurality of connecting bases are fixedly connected to the bottom of the fixed ring, and a spiral nozzle is fixedly installed in each connecting base.

[0011] Further improvement of the technical scheme of the present application is that the spiral nozzle is in the shape of a horn, and a plurality of the spiral nozzles are arranged in an inclined downward manner along the circumferential direction of the fixed ring.

[0012] Further improvement of the technical scheme of the present application is that the tertiary disturbance zone comprises two first low-frequency sound wave generators fixedly installed on the side wall of the desulfurization tower in opposition, and the two first low-frequency sound wave generators are arranged in an inclined downward manner.

[0013] Further improvement of the technical scheme of the present application is that two second low-frequency sound wave generators are fixedly connected to the desulfurization tower below the primary disturbance zone, and the two second low-frequency sound wave generators are arranged in an inclined upward manner.

[0014] Further improvement of the technical scheme of the present application is that a use method of a dry desulfurization equipment based on multi-stage reinforced disturbance comprises the following steps:

[0015] S1, the flue gas enters the desulfurization tower from the air inlet, and the flue gas is upwardly conveyed by the spiral distributor of the first disturbance zone, and the spiral distributor emits desulfurization reagents in the desulfurization tower, so that the desulfurization reagents and the flue gas are fully mixed and contacted;

[0016] S2, the flue gas mixture that is not fully reacted is pushed into the second disturbance zone by the spiral distributor, and under the action of the air flow sprayed by the plurality of spiral nozzles, the flue gas mixing reaction time is prolonged, and the utilization efficiency and full reaction of the desulfurizing agent are ensured;

[0017] S3, after the flue gas mixture partially discharged from the first disturbance zone and the second disturbance zone enters the third disturbance zone, a low-frequency sound wave generator is used to destroy the particle agglomeration in the flue gas mixture and remove the ash deposited on the inner wall of the desulfurization tower;

[0018] S4, the flue gas reaction time in the desulfurization tower is determined according to the data feedback of sulfur dioxide in the flue gas mixture intercepted at the air outlet, and the disturbance intensity of each disturbance zone is adjusted according to the feedback data until the flue gas mixture reaches the emission standard, the air outlet is opened, and the qualified flue gas mixture is discharged for subsequent flue gas treatment steps.

[0019] Due to the adoption of the above technical scheme, the technical progress achieved by the present application relative to the prior art is:

[0020] 1, compared with the circulating fluidized bed tower body in the prior art, the device has small volume, low investment cost and short construction time, and has stronger adaptability to engineering projects that urgently need to treat flue gas.

[0021] 2, by arranging the first disturbance zone, the second disturbance zone and the third disturbance zone, the contact time of the flue gas and the desulfurizing agent is prolonged to 3 seconds, so that the utilization efficiency of the desulfurizing agent is greatly improved.

[0022] 3, the device does not produce waste water during flue gas desulfurization operation, and the by-product (CaSO3 / CaSO4) can be directly used for building materials, resource recycling and utilization, and provides great help to environmental protection. BRIEF DESCRIPTION OF DRAWINGS

[0023] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the following will briefly introduce the drawings needed to be used in the embodiments or prior art description. Obviously, the drawings in the following description are only exemplary, and those skilled in the art can also obtain other implementation drawings according to the provided drawings without creating any creative labor.

[0024] Figure 1 is the overall structure diagram of the present application;

[0025] Figure 2It is a front view of the present application;

[0026] Figure 3 It is Figure 2 It is an enlarged schematic view of A in the middle;

[0027] Figure 4 It is a schematic view of the structure of the secondary disturbance zone in the present application;

[0028] Figure 5 It is a schematic view of the structure of the spiral distributor in the present application;

[0029] Figure 6 It is a schematic view of the installation of the rotating shaft in the present application.

[0030] In the figure: 1, desulfurization tower; 2, gas inlet; 3, gas outlet; 4, primary disturbance zone; 5, secondary disturbance zone; 6, tertiary disturbance zone; 7, spiral distributor; 8, feed pipe; 9, support; 10, hollow pipe; 11, rotating shaft; 12, fan blade; 13, perforated pipe; 14, perforation; 15, discharge hole; 16, driving device; 17, fixed ring; 18, spiral nozzle; 19, first low-frequency sound wave generator; 20, second low-frequency sound wave generator; 21, knocking hammer; 22, hammer rod; 23, first rubber hammer head; 24, second rubber hammer head; 25, chute. DETAILED DESCRIPTION

[0031] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the present application.

[0032] The concepts involved in the present application will be described below in combination with the drawings. It should be pointed out here that the descriptions of the various concepts below are only to make the content of the present application easier to understand, and do not represent a limitation on the scope of protection of the present application; meanwhile, the embodiments in the present application and the features in the embodiments can be combined with each other without conflict. The present application will be described in detail below with reference to the drawings and in combination with the embodiments.

[0033] EMBODIMENT

[0034] As Figures 1 to 6 shown, the present application provides a dry desulfurization equipment based on multi-stage reinforced disturbance, which comprises a desulfurization tower 1, a gas inlet 2 is formed at the bottom of the desulfurization tower 1, a gas outlet 3 is formed at the top of the desulfurization tower 1, and a primary disturbance zone 4, a secondary disturbance zone 5 and a tertiary disturbance zone 6 are sequentially arranged in the desulfurization tower 1 from bottom to top along the direction of flue gas flow;

[0035] The first disturbance zone 4 comprises a spiral distributor 7 fixedly installed in the desulfurization tower 1, and the top of the spiral distributor 7 is fixedly connected with a feeding pipe 8, and the spiral distributor 7 and the feeding pipe 8 are in communication with each other when the spiral distributor 7 rotates.

[0036] As a further description of the embodiment, in the embodiment, a fan is connected with the air inlet 2 through a pipeline, and the fan is connected with the bottom of the desulfurization tower 1. When flue gas desulfurization is needed, the fan is used to blow the flue gas into the desulfurization tower 1, and the flue gas and the desulfurizing agent are fully reacted through the cooperation of the first disturbance zone 4, the second disturbance zone 5 and the third disturbance zone 6, so that the use efficiency of the desulfurizing agent is improved. Compared with the circulating fluidized bed tower in the prior art, the desulfurization tower 1 in the embodiment has the advantages of small volume, low investment cost and short construction time, and has stronger adaptability to engineering projects that urgently need to treat flue gas.

[0037] As a preferred scheme of the dry desulfurization equipment based on multi-stage reinforced disturbance, the spiral distributor 7 comprises a support 9 fixedly installed in the desulfurization tower 1, the support 9 is fixedly connected with a hollow pipe 10, the top of the hollow pipe 10 is fixedly connected with the bottom of the feeding pipe 8, the hollow pipe 10 is in communication with the feeding pipe 8, the outer portion of the hollow pipe 10 is rotatably connected with a rotating shaft 11, the outer portion of the rotating shaft 11 is fixedly connected with a plurality of fan blades 12, the side wall of each fan blade 12 is fixedly connected with a perforated pipe 13, a plurality of perforations 14 are formed in the side wall of the rotating shaft 11, a plurality of discharge holes 15 are formed in the side wall of the hollow pipe 10, one end of each perforation 14 is in communication with the perforated pipe 13, and the other end of each perforation 14 is in communication with the discharge hole 15, and the bottom of the support 9 is fixedly connected with a driving device 16 for driving the rotating shaft 11 to rotate.

[0038] As a further description of the embodiment, in the embodiment, the working principle of the spiral distributor 7 is as follows: a fan is connected with the end of the feeding pipe 8, the desulfurizing agent is sent into the hollow pipe 10 along the feeding pipe 8 through the fan, and then the driving device 16 (a variable frequency motor in the prior art in the embodiment) is started to drive the rotating shaft 11 to rotate, the plurality of fan blades 12 rotate synchronously with the rotating shaft 11, the perforations 14 and the discharge holes 15 are intermittently communicated when the rotating shaft 11 rotates, when the perforations 14 and the discharge holes 15 are communicated, part of the desulfurizing agent in the hollow pipe 10 enters the perforated pipe 13 through the channel formed by the discharge hole 15 and the perforation 14, and the desulfurizing agent in the perforated pipe 13 is sucked out of the holes of the perforated pipe 13 due to the negative pressure suction force generated by the high-speed rotation of the fan blades 12, so that the desulfurizing agent is scattered in the desulfurization tower 1 and mixed with the flue gas for desulfurization.

[0039] As a preferred solution provided by the dry desulfurization equipment based on multi-stage reinforced disturbance, a plurality of knocking hammers 21 are rotatably installed above the inner wall of the desulfurization tower 1, the knocking hammer 21 comprises a hammer rod 22 rotatably connected with the inner wall of the desulfurization tower 1, and the first rubber hammer head 23 and the second rubber hammer head 24 are fixedly connected at both ends of the hammer rod 22 respectively, and the inner wall and the outer wall of the desulfurization tower 1 are both provided with inclined grooves 25 for avoiding the hammer rod 22.

[0040] As a further illustration of the present embodiment, in the present embodiment, the main function of the knocking hammer 21 is to precisely eliminate the blockage problem that may occur in the multi-hole pipe 13 of the spiral distributor 7. Specifically, in the long-term operation of the multi-hole pipe 13, some particles of the desulfurizer or impurities may block the multi-hole pipe 13 or the holes of the multi-hole pipe 13, thereby reducing the proportion of the desulfurizer in the desulfurization tower 1 and affecting the desulfurization operation of the flue gas. To avoid the above situation, a plurality of knocking hammers 21 similar to seesaws are installed above the spiral distributor 7, and the first rubber hammer head 23 and the second rubber hammer head 24 at both ends of the knocking hammer 21 are located inside and outside the desulfurization tower 1, respectively. During the upward movement of the flue gas and the desulfurizer, the upward wind provided by the spiral distributor 7 and the fan drives the rubber hammer head 23 located inside the desulfurization tower 1 to rotate upward, at this time, the height of the first rubber hammer head 23 located inside the desulfurization tower 1 is higher than that of the second rubber hammer head 24. During the upward flight of the flue gas and the desulfurizer, the bottom of the outer surface of the first rubber hammer head 23 blocks and slowly accumulates some impurities or desulfurizer in the flue gas, so that the weight of the bottom of the first rubber hammer head 23 increases, thereby slowly changing the center of gravity of the knocking hammer 21, so that the height of the first rubber hammer head 23 located inside the desulfurization tower 1 slowly decreases until it is lower than the second rubber hammer head 24. Until the first rubber hammer head 23 located inside the desulfurization tower 1 collides with the multi-hole pipe 13 in high-speed rotation (by pre-setting the length of the hammer rod 22, thereby controlling the first rubber hammer head 23 to touch the rotating multi-hole pipe 13 after descending), the rotational inertia generated by the high-speed rotating multi-hole pipe 13 will knock the first rubber hammer head 23, so that the first rubber hammer head 23 drives the hammer rod 22 to rotate upward until the rebound force generated by the collision of the first rubber hammer head 23 with the inner wall of the desulfurization tower 1 drives the first rubber hammer head 23 to move downward again, thereby forming the phenomenon that the first rubber hammer head 23 reciprocates between the multi-hole pipe 13 and the desulfurization tower 1. In this process, the vibration generated by the collision of the first rubber hammer head 23 and the multi-hole pipe 13 shakes the impurities blocked in the multi-hole pipe 13, avoiding the blockage of the holes of the multi-hole pipe 13. In addition, the collision of the first rubber hammer head 23 and the desulfurization tower 1 causes the inner wall of the desulfurization tower 1 to vibrate, thereby eliminating the impurities attached to the inner wall of the desulfurization tower 1 and improving the smoothness of the flue gas flow in the desulfurization tower 1. At the same time, the first rubber hammer head 23 hammers the inner wall of the desulfurization tower 1, and the second rubber hammer head 24 hammers the outer wall of the desulfurization tower 1, which also causes the desulfurization tower 1 to vibrate, thereby eliminating the impurities attached around the spiral distributor 7, thereby achieving the self-cleaning effect of the device. The impurities accumulated at the bottom of the first rubber hammer head 23 are also eliminated when reciprocating between the multi-hole pipe 13 and the inner wall of the desulfurization tower 1, and the first rubber hammer head 23 also consumes part of the kinetic energy when reciprocating between the multi-hole pipe 13 and the desulfurization tower 1, so that the reciprocating amplitude of the first rubber hammer head 23 gradually decreases until the first rubber hammer head 23 does not collide with any part, thereby achieving the resetting effect of the first rubber hammer head 23.The knock hammer 21 in the embodiment promotes deflection of the knock hammer 21 by changing the gravity center through gravity, and eliminates fouling by collision of the knock hammer 21 with the porous pipe 13 and the inner wall of the desulfurization tower 1 after the desulfurization tower 1 works for a period of time. Compared with the cleaning method of the prior art, the cleaning method is more energy-saving and environmentally friendly, and the judgment of excessive fouling completely depends on whether the surface fouling reaches the cleanable standard. In the face of different intensity of desulfurization operation, the cleaning frequency is more reasonable and conforms to the actual working environment, and does not produce excessive cleaning operation burden.

[0041] As a preferred solution provided by the dry desulfurization equipment based on multi-stage reinforced disturbance, all the blades 12 are arranged obliquely, and all the porous pipes 13 are located on the upper surfaces of the blades 12.

[0042] As a further description of the embodiment, in the embodiment, the plurality of blades 12 are arranged obliquely, so that the blades 12 disturb the airflow direction in the desulfurization tower 1 while rotating, so that the flue gas and the desulfurizing agent in the desulfurization tower 1 flow from bottom to top, avoid the desulfurizing agent falling to the bottom of the desulfurization tower 1, and can accelerate the flow rate of the flue gas, so that the flue gas and the desulfurizing agent accelerate the reaction.

[0043] As a preferred solution provided by the dry desulfurization equipment based on multi-stage reinforced disturbance, the second disturbance zone 5 includes a fixed ring 17 fixedly installed in the desulfurization tower 1, and a plurality of connecting bases are fixedly connected to the bottom of the fixed ring 17, and a spiral nozzle 18 is fixedly installed in each connecting base.

[0044] As a preferred solution provided by the dry desulfurization equipment based on multi-stage reinforced disturbance, the spiral nozzle 18 is in a horn shape, and a plurality of spiral nozzles 18 are arranged obliquely downward along the circumferential direction of the fixed ring 17.

[0045] As a further description of the embodiment, in the embodiment, the spiral nozzle 18 sprays the airflow downward, the airflow is sprayed along the annular horn-shaped spiral nozzle 18, and the spray ranges of the plurality of spiral nozzles 18 cooperate to form a turbulent flow field, so that the flue gas mixture entering the second disturbance zone 5 flows downward, and the flue gas mixture flowing downward mixes with the desulfurizing agent sprayed upward by the first disturbance zone 4 again, and then surges upward again, thereby prolonging the contact time of the flue gas and the desulfurizing agent to 3 seconds, thereby greatly improving the utilization efficiency of the desulfurizing agent.

[0046] As a preferred solution provided by the dry desulfurization equipment based on multi-stage reinforced disturbance, the third disturbance zone 6 includes two first low-frequency sound wave generators 19 fixedly installed on the side walls of the desulfurization tower 1, and the two first low-frequency sound wave generators 19 are arranged obliquely downward.

[0047] As a further illustration of the present embodiment, in the present embodiment, the first low-frequency sound wave generator 19 emits low-frequency sound waves (50~200Hz) to break up the particle agglomeration or clumping in the flue gas mixture, so as to lift the flue gas mixture, and the low-frequency sound waves ejected to the tower arm of the desulfurization tower 1 can cause the desulfurization tower 1 to shake, thereby removing the ash deposited on the inner wall of the desulfurization tower 1, and making the flue gas flow more smoothly in the desulfurization tower 1.

[0048] As a preferred solution provided by the dry desulfurization device based on multi-stage reinforced disturbance, two second low-frequency sound wave generators 20 are fixedly connected below the first disturbance zone 4 in the desulfurization tower 1, and the two low-frequency sound wave generators 20 are upwardly inclined.

[0049] As a further illustration of the present embodiment, in the present embodiment, the second low-frequency sound wave generator 20 is placed at the bottom of the desulfurization tower 1, which is used to remove the impurities attached in the first disturbance zone 4 and the second disturbance zone 5, so as to avoid the blockage of the flue gas when flowing through the first disturbance zone 4 and the second disturbance zone 5.

[0050] As a use method of the dry desulfurization device based on multi-stage reinforced disturbance, comprising the following steps:

[0051] S1, the flue gas enters the desulfurization tower 1 from the gas inlet 2, and the flue gas is upwardly conveyed by the spiral distributor 7 of the first disturbance zone 4, while the spiral distributor 7 emits the desulfurization reactant in the desulfurization tower 1, and the desulfurization reactant is fully mixed and contacted with the flue gas;

[0052] S2, the flue gas mixture that is not completely reacted is pushed into the second disturbance zone 5 by the spiral distributor 7, and under the action of the gas flow sprayed by the plurality of spiral nozzles 18, the flue gas mixture reaction time is prolonged, and the utilization efficiency and full reaction of the desulfurization agent are ensured;

[0053] S3, after part of the flue gas mixture that is ejected out of the first disturbance zone 4 and the second disturbance zone 5 enters the third disturbance zone 6, a low-frequency sound wave generator 19 is used to break up the particle agglomeration in the flue gas mixture and remove the ash deposited on the inner wall of the desulfurization tower 1;

[0054] S4, the flue gas reaction time in the desulfurization tower 1 is determined according to the data feedback of sulfur dioxide in the flue gas mixture intercepted by the gas outlet 3, and the disturbance intensity of each disturbance zone is adjusted according to the feedback data until the flue gas mixture reaches the emission standard, and the gas outlet 3 is opened to discharge the flue gas mixture that meets the standard for subsequent flue gas treatment steps.

[0055] As a further illustration of the present embodiment, the following experimental data are obtained when the flue gas desulfurization treatment is performed by the device:

[0056] 1. When the flue gas enters the first disturbance zone 4, the spiral distributor 7 sprays Ca(OH)2 powder (particle size 20 μm) at a speed of 20 rpm, so that the desulfurization tower 1 is covered with powder.

[0057] 2. The opposing air flow (flow rate 30 m / s) generated in the second disturbance zone 5 forms a vortex, the gas-solid contact time is extended to 3 s, and the utilization efficiency of the desulfurizer is improved.

[0058] 3. The low-frequency sound generator 19 (100 Hz) in the third disturbance zone 6 works once every 10 minutes to prevent wall scaling.

[0059] 4. According to the real-time data displayed by the monitoring instrument, the SO2 concentration at the gas outlet 3 is <100 mg / m³, and the consumption of the reagent is reduced by 30% compared with the traditional process.

[0060] In summary, the overall desulfurization effect shows that the utilization rate of the desulfurizer is increased to more than 75%, the desulfurization efficiency is 90%~95% (the average of the traditional dry process is <75%), and the system pressure drop is <1200 Pa.

[0061] The above-described embodiments and / or implementations are merely used to illustrate the preferred embodiments and / or implementations of the present application, and do not limit the embodiments of the present application in any form. Any person skilled in the art can make some changes or modifications to other equivalent embodiments without departing from the scope of the technical means disclosed in the present application, and such changes or modifications should be considered as substantially the same technology or embodiments as the present application.

[0062] The principles and implementations of the present application are described using specific examples in this paper, and the above example descriptions are only used to help understand the method and its core idea of the present application. The above-described preferred embodiments of the present application should be noted that due to the limited nature of the language expression, there are objectively infinite specific structures, and for ordinary skilled persons in the technical field, without departing from the principles of the present application, some improvements, refinements or changes can be made, and the above technical features can be combined in an appropriate manner; these improvements, refinements, changes or combinations, or without improvement, directly apply the concept and technical solution of the present application to other occasions, should be considered as the protection scope of the present application.

Claims

1. A dry desulfurization device based on multi-stage enhanced perturbation, comprising a desulfurization tower (1), characterized in that: The desulfurization tower (1) has an air inlet (2) at the bottom and an air outlet (3) at the top. The desulfurization tower (1) is provided with a first-level disturbance zone (4), a second-level disturbance zone (5) and a third-level disturbance zone (6) in the flue gas flow direction from bottom to top. The primary disturbance zone (4) includes a spiral distributor (7) fixedly installed in the desulfurization tower (1). The top of the spiral distributor (7) is fixedly connected to a feed pipe (8). When the spiral distributor (7) rotates, the spiral distributor (7) and the feed pipe (8) are interconnected. The spiral distributor (7) includes a bracket (9) fixedly installed inside the desulfurization tower (1). A hollow tube (10) is fixedly connected to the bracket (9). The top of the hollow tube (10) is fixedly connected to the bottom of the feed pipe (8), and the hollow tube (10) is connected to the feed pipe (8). A rotating shaft (11) is rotatably connected to the outside of the hollow tube (10). Multiple fan blades (12) are fixedly connected to the outside of the rotating shaft (11). A perforated tube (13) is fixedly connected to the side wall of all the fan blades (12). Multiple perforations (14) are opened on the side wall of the rotating shaft (11). Multiple discharge holes (15) are opened on the side wall of the hollow tube (10). One end of each perforation (14) is connected to the perforated tube (13), and the other end is connected to the discharge hole (15). A driving device (16) for driving the rotating shaft (11) to rotate is fixedly connected to the bottom of the bracket (9). The inner wall of the desulfurization tower (1) is rotatably mounted above the spiral distributor (7) with multiple hammers (21). Each hammer (21) includes a hammer rod (22) rotatably connected to the inner wall of the desulfurization tower (1). The two ends of the hammer rod (22) are respectively fixedly connected to a first rubber hammer head (23) and a second rubber hammer head (24). The inner and outer walls of the desulfurization tower (1) are provided with inclined grooves (25) for avoiding the hammer rods (22).

2. The dry desulfurization equipment based on multi-stage enhanced perturbation according to claim 1, characterized in that: All the fan blades (12) are inclined, and all the porous tubes (13) are located on the upper surface of the fan blades (12).

3. The dry desulfurization equipment based on multi-stage enhanced perturbation according to claim 1, characterized in that: The secondary disturbance zone (5) includes a fixed ring (17) fixedly installed in the desulfurization tower (1). The bottom of the fixed ring (17) is fixedly connected to multiple connecting bases, and each connecting base is fixedly installed with a spiral nozzle (18).

4. A dry desulfurization equipment based on multi-stage enhanced perturbation according to claim 3, characterized in that: The spiral nozzle (18) is trumpet-shaped, and the plurality of spiral nozzles (18) are inclined downward along the circumferential direction of the fixing ring (17).

5. A dry desulfurization equipment based on multi-stage enhanced perturbation according to claim 1, characterized in that: The third-level disturbance zone (6) includes two first low-frequency sound wave generators (19) that are relatively fixedly installed on the side wall of the desulfurization tower (1), and both first low-frequency sound wave generators (19) are inclined downward.

6. The dry desulfurization equipment based on multi-stage enhanced perturbation according to claim 1, characterized in that: Two second low-frequency acoustic wave generators (20) are fixedly connected below the first-level disturbance zone (4) in the desulfurization tower (1), and both second low-frequency acoustic wave generators (20) are inclined upward.

7. A method of using a dry desulfurization equipment based on multi-stage enhanced perturbation as described in any one of claims 1-6, characterized in that, Includes the following steps: S1. Flue gas enters the desulfurization tower (1) through the inlet (2). While the flue gas is being transported upward through the spiral distributor (7) in the first-stage disturbance zone (4), the spiral distributor (7) also releases desulfurization reactant into the desulfurization tower (1) to fully mix and react with the flue gas. S2. The incompletely reacted flue gas mixture is pushed into the secondary disturbance zone (5) by the spiral distributor (7). Under the action of the airflow ejected from multiple spiral nozzles (18), the flue gas mixing reaction time is extended to ensure the utilization efficiency and full reaction of the desulfurizing agent. S3. After the flue gas mixture that has partially rushed out of the first-level disturbance zone (4) and the second-level disturbance zone (5) enters the third-level disturbance zone (6), a low-frequency sound wave generator (19) is used to break the particle agglomeration in the flue gas mixture and remove the ash accumulation on the inner wall of the desulfurization tower (1). S4. The reaction time of flue gas in the desulfurization tower (1) is determined based on the data feedback of sulfur dioxide in the flue gas mixture intercepted by the outlet (3). The disturbance intensity of each disturbance zone is adjusted according to the feedback data until the flue gas mixture reaches the emission standard. Then the outlet (3) is opened to discharge the qualified flue gas mixture for subsequent flue gas treatment steps.

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