Desulfurization device

Abstract

The utility model is suitable for the technical field of desulfurization equipment, and provides a desulfurization device. The desulfurization device comprises a reactor, a desulfurization agent can be placed in the reactor, the desulfurization agent is used for converting sulfurized gas into desulfurized gas, the reactor is provided with a gas inlet and a gas outlet, the gas inlet is used for receiving the sulfurized gas, and the gas outlet is used for discharging the desulfurized gas; the conveying pipe is communicated with the gas outlet and is used for conveying desulfurized gas; the return pipe is communicated with the conveying pipe and the reactor, and the return pipe can enable the desulfurized gas in the conveying pipe to flow back into the reactor. The gas introduced into the reactor is the desulfurized gas converted from the high-temperature sulfurized gas, so that the fluidity of the desulfurizer is improved, the desulfurization efficiency is improved, meanwhile, the conditions that the desulfurizer is hardened and the like due to the fact that external air containing moisture is introduced into the reactor are avoided, and the dryness and reliability of the desulfurizer are ensured.

Description

Technical Field

[0001] This application belongs to the field of desulfurization equipment technology, and more specifically, relates to a desulfurization device. Background Technology

[0002] A desulfurization unit is a device used to remove sulfides (especially sulfur dioxide) and other sulfur-containing compounds from gases.

[0003] The desulfurization device in the relevant technology includes a reactor, a conveying pipe, and flue gas. The reactor contains a desulfurizing agent, and one end of the conveying pipe is connected to the reactor, while the other end is connected to the flue gas. In order to make the desulfurizing agent in the reactor rise and thus promote the desulfurization reaction, air from the atmosphere is usually introduced into the reactor. However, since the temperature of the air in the atmosphere is low, when the air is introduced into the reactor, it may reduce the fluidity of the desulfurizing agent, thereby affecting the desulfurization reaction efficiency. Utility Model Content

[0004] The purpose of this application is to provide a desulfurization device that addresses the technical problem of low fluidity of desulfurizing agents in related technologies.

[0005] To achieve the above objectives, according to one aspect of this application, a desulfurization device is provided, comprising: a reactor in which a desulfurizing agent can be placed, the desulfurizing agent being used to convert sulfurized gas into desulfurized gas, the reactor having an inlet and an outlet, the inlet being used to receive sulfurized gas and the outlet being used to discharge desulfurized gas; a conveying pipe connected to the outlet for conveying desulfurized gas; and a return pipe connected to the conveying pipe and connected to the reactor, the return pipe enabling the desulfurized gas in the conveying pipe to flow back into the reactor.

[0006] Optionally, the desulfurization device also includes a first filter, a delivery pipe connected to the gas outlet through the first filter, the first filter being able to trap the desulfurizing agent in the desulfurization gas; and a return pipe connected to the reactor through the first filter, which is able to blow the desulfurizing agent trapped by the first filter into the reactor through the desulfurization gas.

[0007] Optionally, the desulfurization device also includes a collection chamber located below the first filter and capable of collecting the desulfurizing agent that falls from the first filter; a return pipe is connected to the collection chamber and can blow the desulfurizing agent in the collection chamber into the reactor through desulfurization gas.

[0008] Optionally, the desulfurization unit also includes a fluidizing fan installed on the return pipe, which can transport the desulfurized gas in the return pipe toward the reactor.

[0009] Optionally, the number of fluidizing fans is multiple; the backflow pipe comprises a first pipe section, multiple second pipe sections, a third pipe section, and multiple fourth pipe sections, wherein the first pipe section is in communication with the conveying pipe; the number of second pipe sections is the same as the number of fluidizing fans, the multiple second pipe sections are all in communication with the first pipe section, the multiple fluidizing fans are respectively arranged in one-to-one correspondence with the multiple second pipe sections, and the multiple fluidizing fans are respectively installed on the corresponding second pipe sections; the multiple second pipe sections are all in communication with the third pipe section; and the multiple fourth pipe sections are all in communication with the third pipe section and are all in communication with the reactor.

[0010] Optionally, the backflow pipe has a standby port in communication with the external atmosphere; and a switch valve is installed on the backflow pipe, and the switch valve can switch the standby port and the backflow pipe between a communication state and an isolation state.

[0011] Optionally, the desulfurization device further comprises a second filter installed on the backflow pipe, and an output end of the second filter is in communication with the standby port.

[0012] Optionally, a flow detection member and a flow adjustment member are installed on the backflow pipe, the flow detection member is used for detecting the flow of the desulfurized gas in the backflow pipe, and the flow adjustment member is used for adjusting the flow of the desulfurized gas in the backflow pipe; the desulfurization device further comprises a control member, the flow detection member is electrically connected with the control member, the flow adjustment member is electrically connected with the control member, the fluidizing fan is electrically connected with the control member, and the switch valve is electrically connected with the control member.

[0013] Optionally, a humidity detection member is installed on the backflow pipe, used for detecting the humidity of the desulfurized gas in the backflow pipe, and the humidity detection member is electrically connected with the control member; and / or, the reactor has a U-shaped structure; and / or, the backflow pipe and the fluidizing fan are both sleeved with a heat preservation structure.

[0014] Optionally, the desulfurization device further comprises a smoke brine in communication with the conveying pipe and used for receiving the desulfurized gas; and a conveying fan installed on the conveying pipe and capable of conveying the desulfurized gas in the conveying pipe to move towards the smoke brine.

[0015] The desulfurization device provided by the application has the beneficial effects that: when the desulfurization device provided by the application is used for desulfurization treatment, the sulfuration gas is first introduced into the reactor through the gas inlet, and the sulfuration gas is converted into desulfurization gas under the action of the desulfurization agent in the reactor, and the desulfurization gas is discharged into the conveying pipe through the gas outlet; with the continuous flow of the desulfurization gas in the conveying pipe, part of the desulfurization gas flows into the reactor through the reflux pipe, thereby driving the desulfurization agent to be lifted. Since the gas introduced into the reactor is the desulfurization gas converted from the high-temperature sulfuration gas, this not only helps to improve the fluidity of the desulfurization agent, thereby improving the desulfurization efficiency, but also avoids the caking of the desulfurization agent caused by the introduction of external air containing water into the reactor, thereby ensuring the dryness and reliability of the desulfurization agent. In addition, the above design also avoids the increase of the accuracy deviation of the on-line monitoring of the pollutant emission caused by the introduction of air with high oxygen content into the reactor, thereby ensuring the accuracy of the on-line monitoring system of the pollutant emission. BRIEF DESCRIPTION OF DRAWINGS

[0016] In order to more clearly illustrate the technical solutions in the embodiments of the application, the drawings needed to be used in the embodiments or prior art description will be briefly introduced below. Obviously, the drawings in the following description are only some embodiments of the application, and other drawings can also be obtained by those skilled in the art without creative labor.

[0017] Figure 1 The structural schematic diagram of the desulfurization device provided by the embodiments of the application is shown in the figure.

[0018] Figure 2 The structural schematic diagram of the desulfurization device provided by the embodiments of the application is shown in the figure. Figure 1 The enlarged schematic diagram of A in the figure.

[0019] Figure 3 The circuit system diagram of the desulfurization device provided by the embodiments of the application is shown in the figure.

[0020] The label details involved in the above figures are as follows:

[0021] 100, reactor; 110, gas inlet; 120, gas outlet; 200, conveying pipe;

[0022] 300, reflux pipe; 310, first pipe section; 320, second pipe section; 330, third pipe section; 340, fourth pipe section; 350, standby port;

[0023] 400, first filter; 500, collection bin; 600, fluidization fan; 700, on-off valve; 800, second filter; 900, flow detection piece; 1000, flow adjustment piece; 1100, control piece; 1200, humidity detection piece; 1300, smoke halo; 1400, conveying fan. DETAILED DESCRIPTION

[0024] In order to make the technical problems to be solved, technical solutions and beneficial effects of the present application clearer, the present application will be further described in detail below with reference to the drawings and embodiments. It should be understood that the specific embodiments described herein are only intended to explain the present application and not to limit the present application.

[0025] It should be noted that when an element is referred to as being "fixed to" or "set on" another element, it can be directly on the other element or indirectly on the other element. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or indirectly connected to the other element. 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 embodiments.

[0026] It should be understood that the terms "length", "width", "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the purpose of facilitating the description of the present application and simplifying the description, and therefore cannot be understood as indicating or implying that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the present application.

[0027] In addition, the terms "first", "second", "third", etc. are only used for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined with "first", "second", etc. can explicitly or implicitly include one or more of the features. In the description of the present application, the meaning of "plurality" is two or more, unless otherwise explicitly specified.

[0028] As described in the background, the desulfurization device is a device for removing sulfides (especially sulfur dioxide) and other sulfur-containing compounds in gas. The desulfurization device in the related art includes a reactor, a conveying pipe, and a flue, wherein the desulfurizer is placed in the reactor, one end of the conveying pipe is communicated with the reactor, and the other end of the conveying pipe is communicated with the flue; in order to lift the desulfurizer in the reactor and thus promote the desulfurization reaction, atmospheric air is usually introduced into the reactor; however, since the temperature of the atmospheric air is low, when the atmospheric air is introduced into the reactor, it can cause the flowability of the desulfurizer to decrease, thereby affecting the desulfurization reaction efficiency.

[0029] Referring to Figure 1In order to solve the above problems, according to one aspect of the present application, the embodiment of the present application provides a desulfurization device, which comprises a reactor 100, a conveying pipe 200 and a backflow pipe 300, wherein the desulfurization device is capable of placing a desulfurizer in the reactor 100, the desulfurizer is used for converting sulfuration gas into desulfurization gas, the reactor 100 has a gas inlet 110 and a gas outlet 120, the gas inlet 110 is used for receiving the sulfuration gas, and the gas outlet 120 is used for discharging the desulfurization gas; the conveying pipe 200 is communicated with the gas outlet 120 and is used for conveying the desulfurization gas; the backflow pipe 300 is communicated with the conveying pipe 200 and the reactor 100, and the backflow pipe 300 is capable of making the desulfurization gas in the conveying pipe 200 backflow into the reactor 100.

[0030] In the embodiment, the desulfurizer is generally lime, and in other embodiments, the desulfurizer can also be activated carbon.

[0031] When the desulfurization device of the present application performs desulfurization treatment, the sulfuration gas is first introduced into the reactor 100 through the gas inlet 110, and the sulfuration gas is converted into desulfurization gas under the action of the desulfurizer in the reactor 100, and the desulfurization gas is discharged into the conveying pipe 200 through the gas outlet 120; accompanied by the continuous flow of the desulfurization gas in the conveying pipe 200, part of the desulfurization gas flows into the reactor 100 through the backflow pipe 300, thereby driving the desulfurizer to be lifted. Since the gas introduced into the reactor 100 is the desulfurization gas converted from the high-temperature sulfuration gas, this not only helps to improve the flowability of the desulfurizer, thereby improving the desulfurization efficiency, but also avoids the desulfurizer from being hardened due to the introduction of external air containing moisture into the reactor 100, thereby ensuring the dryness and reliability of the desulfurizer. In addition, the above design also avoids the increase of the accuracy deviation of the on-line monitoring of the pollutant emission due to the introduction of air with high oxygen content into the reactor 100, thereby ensuring the accuracy of the on-line monitoring system of the pollutant emission.

[0032] Reference Figure 1 In one embodiment, the desulfurization device further comprises a first filter 400, the conveying pipe 200 is communicated with the gas outlet 120 through the first filter 400, the first filter 400 is capable of trapping the desulfurizer in the desulfurization gas; the backflow pipe 300 is communicated with the reactor 100 through the first filter 400, and the desulfurizer trapped by the first filter 400 can be blown into the reactor 100 by the desulfurization gas.

[0033] In the embodiment, the first filter 400 is a conventional filter device, the first filter 400 is located between the reactor 100 and the conveying pipe 200, the gas outlet 120 is communicated with the first filter 400, the conveying pipe 200 is communicated with the first filter 400 and is oppositely arranged with the reactor 100, so that the conveying pipe 200 is communicated with the gas outlet 120 through the first filter 400; the reflux pipe 300 is located below the first filter 400, the reflux pipe 300 is communicated with the first filter 400, so that the reflux pipe 300 is communicated with the reactor 100 through the first filter 400.

[0034] After the sulfurized gas is converted into desulfurized gas under the action of the desulfurizer in the reactor 100, the desulfurized gas is discharged into the first filter 400 through the gas outlet 120, the first filter 400 traps the desulfurizer in the desulfurized gas, so as to ensure that the gas conveyed into the conveying pipe 200 is clean desulfurized gas; with the continuous flow of the desulfurized gas in the reflux pipe 300, the reflux pipe 300 blows the desulfurizer trapped by the first filter 400 into the reactor 100, so that the first filter 400 can be kept clean, thereby improving the filtering effect of the first filter 400, and the desulfurizer trapped by the first filter 400 can be utilized again, thereby improving the reaction efficiency. The first filter 400 is arranged to filter the desulfurizer; the reflux pipe 300 is arranged to ensure that the desulfurizer trapped by the first filter 400 can be utilized again, thereby reducing the production cost.

[0035] Referring to Figure 1 In an embodiment, the desulfurization device further comprises a collection bin 500, the collection bin 500 is located below the first filter 400 and can collect the desulfurizer falling from the first filter 400; the reflux pipe 300 is communicated with the collection bin 500 and can blow the desulfurizer in the collection bin 500 into the reactor 100 through the desulfurized gas.

[0036] In the embodiment, the collection bin 500 is communicated with the first filter 400 to collect the desulfurizer falling from the first filter 400; the reflux pipe 300 is usually located below the collection bin 500 and is communicated with the collection bin 500 to blow most of the desulfurizer in the collection bin 500 into the reactor 100 through the desulfurized gas. In addition, in order to facilitate the collection of the desulfurizer, the collection bin 500 can be in the shape of a funnel with a wide upper part and a narrow lower part.

[0037] After the first filter 400 traps the desulfurizer in the desulfurized gas, the desulfurizer will fall into the collection bin 500 under the action of its own gravity; with the continuous flow of the desulfurized gas in the reflux pipe 300, the reflux pipe 300 will blow the desulfurizer in the collection bin 500 into the reactor 100. The collection bin 500 provided plays a role in collecting the desulfurizer, ensuring that the desulfurized gas in the reflux pipe 300 can smoothly blow the desulfurizer into the reactor 100.

[0038] Referring to Figure 1 In an embodiment, the desulfurization device further comprises a fluidization fan 600, the fluidization fan 600 is installed on the reflux pipe 300, and the fluidization fan 600 can transport the desulfurized gas in the reflux pipe 300 to move towards the reactor 100.

[0039] In this embodiment, the fluidization fan 600 has a fluidization air inlet end and a fluidization air outlet end, both of which are in communication with the reflux pipe 300, and the fluidization air outlet end is usually located on the side of the fluidization air inlet end close to the reactor 100. By using the fluidization fan 600 in the present application, the flow speed of the desulfurized gas in the reflux pipe 300 is accelerated, thereby not only improving the diffusion speed of the desulfurizer in the collection bin 500, but also ensuring that most of the desulfurizer in the collection bin 500 can be blown into the reactor 100.

[0040] Referring to Figure 1 In an embodiment, the number of fluidization fans 600 is multiple; the reflux pipe 300 comprises a first pipe section 310, multiple second pipe sections 320, a third pipe section 330, and multiple fourth pipe sections 340, wherein the first pipe section 310 is in communication with the conveying pipe 200; the number of second pipe sections 320 is the same as the number of fluidization fans 600, the multiple second pipe sections 320 are all in communication with the first pipe section 310, the multiple fluidization fans 600 are respectively and one-to-one corresponding to the multiple second pipe sections 320, and the multiple fluidization fans 600 are respectively installed on the corresponding second pipe sections 320; the multiple second pipe sections 320 are all in communication with the third pipe section 330; the multiple fourth pipe sections 340 are all in communication with the third pipe section 330 and are all in communication with the reactor 100.

[0041] In this embodiment, the number of fluidization fans 600 is usually two, and the two fluidization fans 600 are spaced apart; the number of second pipe sections 320 is two, and the two second pipe sections 320 are spaced apart, and the two fluidization fans 600 are respectively installed on the corresponding second pipe sections 320; the number of fourth pipe sections 340 is three, and the three fourth pipe sections 340 are spaced apart.

[0042] With the continuous flow of the desulfurized gas in the return pipe 300, part of the desulfurized gas will flow into the first pipe section 310, and the desulfurized gas in the first pipe section 310 will flow into the second pipe sections 320 under the suction of the fluidizing fans 600; then the desulfurized gas in the second pipe sections 320 will flow into the third pipe section 330 under the delivery of the fluidizing fans 600; then the desulfurized gas in the third pipe section 330 will flow into the fourth pipe sections 340 respectively, and finally be delivered to the collection bin 500 through the fourth pipe sections 340; the fluidizing fans 600 further accelerate the flow speed of the desulfurized gas in the return pipe 300; the fourth pipe sections 340 ensure the uniformity of the distribution of the desulfurized gas blown into the collection bin 500, thereby ensuring that most of the desulfurizing agent in the collection bin 500 can enter the reactor 100 under the blowing action of the desulfurized gas, and reducing the residual amount of the desulfurizing agent in the collection bin 500.

[0043] With reference to Figure 1 and Figure 2 In an embodiment, the return pipe 300 has a standby port 350 which is in communication with the external atmosphere; the return pipe 300 is provided with a switch valve 700 which can switch the standby port 350 and the return pipe 300 between the communication state and the isolation state.

[0044] In this embodiment, the standby port 350 is usually arranged on the first pipe section 310; when the desulfurized gas is usually flowed into the return pipe 300, the switch valve 700 is controlled to make the standby port 350 and the return pipe 300 in the isolation state, thereby avoiding the air in the external atmosphere from entering the reactor 100; when the desulfurized gas is no longer flowed into the return pipe 300, the switch valve 700 is controlled to make the standby port 350 and the return pipe 300 in the communication state, thereby ensuring that the desulfurizing agent can be normally lifted, and ensuring the smooth operation of the desulfurizing device.

[0045] With reference to Figure 1 and Figure 2 In an embodiment, the desulfurizing device further comprises a second filter 800 which is arranged on the return pipe 300, and the output end of the second filter 800 is in communication with the standby port 350.

[0046] In this embodiment, the second filter 800 is a conventional filtering device, the input end of the second filter 800 is arranged opposite to the output end of the second filter 800, and the input end of the second filter 800 is located on the side of the output end of the second filter 800 which is away from the standby port 350. The second filter 800 helps to filter the dust and sundries in the air, thereby ensuring that the return pipe 300, the collection bin 500 and the reactor 100 are kept clean.

[0047] With reference to Figures 1 to 3In an embodiment, the flow detection member 900 is arranged on the return pipe 300 to detect the flow of the desulfurized gas in the return pipe 300, and the flow regulating member 1000 is arranged on the return pipe 300 to regulate the flow of the desulfurized gas in the return pipe 300; the desulfurization device further comprises a control member 1100, the flow detection member 900 is electrically connected to the control member 1100, the flow regulating member 1000 is electrically connected to the control member 1100, the fluidizing fan 600 is electrically connected to the control member 1100, and the on-off valve 700 is electrically connected to the control member 1100.

[0048] In the embodiment, the flow detection member 900 is a conventional flow meter, and the flow regulating member 1000 is a conventional flow regulating valve; the flow detection member 900 and the flow regulating member 1000 are arranged on the first pipe segment 310 and located on the side of the standby port 350 close to the conveying pipe 200; and the control member 1100 is a controller.

[0049] When the flow detection member 900 detects that the flow of the desulfurized gas in the return pipe 300 is abnormal, the flow detection member 900 feeds back a corresponding data signal to the control member 1100, the control member 1100 issues corresponding instruction signals to the flow regulating member 1000, the fluidizing fan 600 and the on-off valve 700 respectively according to the feedback data signal, so as to ensure the normal operation of the desulfurization device. The above design helps to realize linkage of each component in the desulfurization device, so as to ensure the normal operation of the desulfurization device.

[0050] With reference to Figure 1 and Figure 3 In an embodiment, the humidity detection member 1200 is arranged on the return pipe 300 to detect the humidity of the desulfurized gas in the return pipe 300, and the humidity detection member 1200 is electrically connected to the control member 1100.

[0051] In the embodiment, the humidity detection member 1200 is a conventional humidity meter, and the humidity detection member 1200 is arranged on the first pipe segment 310 and located on the side of the standby port 350 close to the conveying pipe 200; when the humidity detection member 1200 detects that the humidity of the desulfurized gas in the return pipe 300 is abnormal, the humidity detection member 1200 feeds back a corresponding data signal to the control member 1100, the control member 1100 issues corresponding instruction signals to the flow regulating member 1000, the fluidizing fan 600 and the on-off valve 700 respectively according to the feedback data signal, so as to ensure the normal operation of the desulfurization device. The above design helps to realize linkage of each component in the desulfurization device, so as to ensure the normal operation of the desulfurization device.

[0052] With reference to Figure 1In an embodiment, the reactor 100 is in a U-shaped structure. In the embodiment, the reactor 100 is a U-shaped tube, and the gas inlet 110 is located below the gas outlet 120. The above design helps to improve the utilization efficiency of the desulfurizing agent while ensuring smooth flow of the gas in the reactor 100.

[0053] With reference to Figure 1 In an embodiment, the return pipe 300 and the fluidizing fan 600 are both sleeved with a heat preservation structure. In the embodiment, the return pipe 300 and the fluidizing fan 600 are both fixedly sleeved with a heat preservation layer or a heat preservation cover. The above design helps to keep the desulfurized gas flowing in the return pipe 300 at a high temperature, thereby ensuring the fluidity of the desulfurizing agent in the reactor 100.

[0054] With reference to Figure 1 In an embodiment, the desulfurization device further comprises a smoke halo 1300, which is in communication with the conveying pipe 200 and used to receive the desulfurized gas; and a conveying fan 1400, which is installed on the conveying pipe 200 and capable of conveying the desulfurized gas in the conveying pipe 200 to move towards the smoke halo 1300.

[0055] In the embodiment, the smoke halo 1300 is vertically arranged and capable of continuously desulfurizing the desulfurized gas; and the conveying fan 1400 has a conveying gas inlet end and a conveying gas outlet end, both of which are in communication with the conveying pipe 200, and the conveying gas inlet end is located on the side of the conveying gas outlet end away from the smoke halo 1300. The arranged smoke halo 1300 not only can desulfurize the desulfurized gas again, but also can discharge the gas after the second desulfurization to the atmospheric environment; and the arranged conveying fan 1400 helps to improve the flow speed of the desulfurized gas in the conveying pipe 200. In addition, the conveying motor can be electrically connected with the control member 1100 to realize linkage with other components in the desulfurization device.

[0056] In summary, the desulfurization device provided by the embodiment has at least the following beneficial technical effects: when the desulfurization device is used for desulfurization treatment, the sulfuration gas is first introduced into the reactor 100 through the gas inlet 110, and the sulfuration gas is converted into desulfurization gas under the action of the desulfurization agent in the reactor 100, and the desulfurization gas is discharged into the conveying pipe 200 through the gas outlet 120; with the continuous flow of the desulfurization gas in the conveying pipe 200, part of the desulfurization gas flows into the reactor 100 through the reflux pipe 300, thereby driving the desulfurization agent to be lifted. Since the gas introduced into the reactor 100 is the desulfurization gas converted from the high-temperature sulfuration gas, it not only helps to improve the fluidity of the desulfurization agent, thereby improving the desulfurization efficiency, but also avoids the caking of the desulfurization agent caused by the introduction of external air containing water into the reactor 100, thereby ensuring the dryness and reliability of the desulfurization agent. In addition, the above design also avoids the increase of the accuracy deviation of the pollutant emission on-line monitoring caused by the introduction of air with high oxygen content into the reactor 100, thereby ensuring the accuracy of the pollutant emission on-line monitoring system.

[0057] The above is only a preferred embodiment of the present application and is not intended to limit the present application. Any modifications, equivalent replacements and improvements made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A desulfurization device, characterized in that, The desulfurization device comprises: a reactor, which is capable of placing a desulfurizer therein for converting sulfidized gas into desulfurized gas, the reactor having a gas inlet for receiving the sulfidized gas and a gas outlet for discharging the desulfurized gas; a conveying pipe, which is in communication with the gas outlet for conveying the desulfurized gas; a backflow pipe, which is in communication with the conveying pipe and the reactor, and is capable of making the desulfurized gas in the conveying pipe backflow into the reactor; the desulfurization device further comprises a fluidization fan, which is installed on the backflow pipe and is capable of conveying the desulfurized gas in the backflow pipe to move towards the reactor; the number of the fluidization fans is multiple; the backflow pipe comprises a first pipe segment, multiple second pipe segments, a third pipe segment and multiple fourth pipe segments, wherein the first pipe segment is in communication with the conveying pipe; the number of the second pipe segments is the same as the number of the fluidization fans, multiple second pipe segments are in communication with the first pipe segment, multiple fluidization fans are correspondingly arranged in multiple second pipe segments, and multiple fluidization fans are respectively installed on corresponding second pipe segments; multiple second pipe segments are in communication with the third pipe segment; multiple fourth pipe segments are in communication with the third pipe segment and the reactor.

2. The desulfurizing apparatus according to claim 1, characterized by the desulfurization device further comprises a first filter, the conveying pipe is in communication with the gas outlet through the first filter, and the first filter is capable of trapping the desulfurizer in the desulfurized gas; the backflow pipe is in communication with the reactor through the first filter, and is capable of blowing the desulfurizer trapped by the first filter into the reactor through the desulfurized gas.

3. The desulfurizing apparatus according to claim 2, characterized by the desulfurization device further comprises a collection bin, which is located below the first filter and is capable of collecting the desulfurizer falling from the first filter; the backflow pipe is in communication with the collection bin, and is capable of blowing the desulfurizer in the collection bin into the reactor through the desulfurized gas.

4. The desulfurizing apparatus according to claim 1, characterized by the backflow pipe has a standby port, which is in communication with the external atmosphere; a switch valve is installed on the backflow pipe, and the switch valve is capable of switching the standby port and the backflow pipe between a communication state and an isolation state.

5. The desulfurizing apparatus according to claim 4, characterized by the desulfurization device further comprises a second filter, which is installed on the backflow pipe, and an output end of the second filter is in communication with the standby port.

6. The desulfurizing apparatus according to claim 4, characterized by a flow detection member and a flow adjustment member are installed on the backflow pipe, the flow detection member is used for detecting the flow of the desulfurized gas in the backflow pipe, and the flow adjustment member is used for adjusting the flow of the desulfurized gas in the backflow pipe; the desulfurization device further comprises a control member, the flow detection member is electrically connected with the control member, the flow adjustment member is electrically connected with the control member, the fluidization fan is electrically connected with the control member, and the switch valve is electrically connected with the control member.

7. The desulfurizing apparatus according to claim 6, characterized by a humidity detection member is installed on the backflow pipe for detecting the humidity of the desulfurized gas in the backflow pipe, the humidity detection member is electrically connected with the control member; and / or, The reactor is in a U-shaped structure; and / or, The return pipe and the fluidization fan are sleeved with heat preservation structures.

8. The desulfurizing apparatus according to any one of claims 1 to 3, characterized by The desulfurization device further comprises a smoke halo, which is communicated with the conveying pipe and used for receiving the desulfurized gas; The desulfurization device further comprises a conveying fan, which is installed on the conveying pipe and can convey the desulfurized gas in the conveying pipe to move towards the smoke halo.

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