Flue gas desulfurization device

Abstract

The application discloses a flue gas desulfurization device, and belongs to the technical field of flue gas purification. The device comprises a tower body, a liquid storage tank and a reaction layer arranged in the tower body. The tower body contains desulfurization liquid. The liquid storage tank is connected with the tower body and the reaction layer through a circulating pipeline. An aeration assembly is immersed in the desulfurization liquid. The aeration assembly comprises a plurality of aeration components and a smoke inlet pipeline connected with a smoke inlet. The aeration components are connected with the smoke inlet pipeline. A baffle assembly is arranged at the top of the aeration assembly and used for prolonging the residence time of the flue gas in the desulfurization liquid. The flue gas desulfurization device has little change on the original desulfurization tower structure. The flue gas is firstly introduced into the desulfurization liquid at the bottom of the tower body to perform a preliminary reaction, and then the flue gas is subjected to a secondary reaction through the original desulfurization structure of the desulfurization tower. The desulfurization liquid can be fully utilized, and the desulfurization effect can be improved.

Description

Technical Field

[0001] This application relates to the field of flue gas purification and treatment technology, specifically to a flue gas desulfurization device. Background Technology

[0002] Flue gas treatment processes generally involve dust removal, desulfurization, and denitrification. A desulfurization tower is a device that desulfurizes flue gas (industrial waste gas). Its main function is to use internal desulfurization processes to remove harmful substances (sulfur dioxide) from the flue gas through chemical reactions or adsorption, thereby achieving the purpose of desulfurization, reducing the emission of harmful gases, and protecting the environment.

[0003] In traditional wet desulfurization towers, flue gas enters the tower from the bottom and comes into countercurrent contact with alkaline desulfurization liquid (such as limestone solution) sprayed from the top of the tower through a packing layer. The liquid reacts chemically with sulfur dioxide (SO2) in the flue gas. However, if too much desulfurization liquid is sprayed or if the liquid does not react fully with the flue gas, the unreacted liquid will accumulate at the bottom of the tower and be discharged under gravity, making it difficult to fully utilize the desulfurization liquid and resulting in waste. Utility Model Content

[0004] To address the aforementioned technical problems, this application provides a flue gas desulfurization device. By first introducing the flue gas into the desulfurization liquid at the bottom of the tower for a preliminary reaction, and then having the flue gas undergo a secondary reaction in the reaction layer, the device can fully utilize the desulfurization liquid and improve desulfurization efficiency. The technical solution is as follows: A flue gas desulfurization device includes a tower body and a liquid storage tank, as well as a reaction layer disposed in the tower body. The tower body contains desulfurization liquid, and a circulation pipeline connects the liquid storage tank to the tower body and the reaction layer. An aeration assembly submerged in the desulfurization liquid; the aeration assembly includes several aeration components and a flue gas inlet pipe connected to the flue gas inlet, the aeration components being connected to the flue gas inlet pipe; The aeration component is equipped with a baffle assembly at the top to extend the residence time of the flue gas in the desulfurization liquid.

[0005] Preferably, the aeration components are installed upside down on the top of the smoke inlet pipe, and the top of the aeration components is provided with a flow guide hood.

[0006] Preferably, the baffle assembly includes a fixed bracket and a plurality of baffle plates disposed on the fixed bracket; the baffle plates are evenly distributed longitudinally, and curved air passages are formed between the baffle plates.

[0007] More preferably, the baffle plate is wavy.

[0008] Preferably, the liquid storage tank is provided with partitions of progressively decreasing height, which divide the liquid storage tank into an inlet chamber, a sedimentation chamber, a mixing chamber, and a storage chamber. The drain port is connected to the storage chamber, and the injection port is connected to the inlet chamber.

[0009] Preferably, the circulation pipeline includes a first circulation pipeline and a second circulation pipeline, wherein the first circulation pipeline connects the liquid storage tank to the tower body, and the second circulation pipeline connects the liquid storage tank to the tower body and the reaction layer.

[0010] Preferably, both the first circulation pipe and the second circulation pipe include a connecting pipe and a power assembly arranged on the connecting pipe for driving the flow of desulfurization liquid, and a check valve is provided at each end of the power assembly.

[0011] Compared with the prior art, the beneficial effects of this application are as follows: This application makes minimal changes to the original desulfurization tower structure. By first introducing the flue gas into the desulfurization liquid at the bottom of the tower for a preliminary reaction, the original desulfurization structure of the tower then performs a secondary reaction on the flue gas. This allows for full utilization of the desulfurization liquid and improves the desulfurization effect. Attached Figure Description

[0012] Figure 1 This is a schematic diagram of the structure of this application.

[0013] In the picture: 10. Tower body; 110. Smoke inlet; 120. Smoke outlet; 130. Liquid injection port; 140. Overflow port; 150. Sewage outlet; 20. Storage tank; 210. Inlet chamber; 220. Sedimentation chamber; 230. Mixing chamber; 30. Circulation pipeline; 310. First circulation pipeline; 320. Second circulation pipeline; 330. Power assembly; 340. Connecting pipe; 40. Aeration components; 410. Smoke inlet pipe; 420. Aeration parts; 50. Baffle assembly; 500. Air passage; 510. Fixed bracket; 520. Baffle plate; 60. Reaction layer; 610. Filler layer; 620. Spray layer. Detailed Implementation

[0014] The technical solutions in the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the embodiments described in this application are only some embodiments of this application, and not all embodiments. Based on the embodiments in this application, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of this application.

[0015] See Figure 1 To further elaborate on this application: A flue gas desulfurization device includes a tower body 10 and a liquid storage tank 20, and a reaction layer 60 disposed within the tower body 10, wherein the tower body 10 contains desulfurization liquid; wherein the reaction layer 60 includes a packing layer 610 and a spray layer 620, and the tower body 10 is provided with a flue gas inlet 110 and a flue gas outlet 120, the flue gas outlet 120 being located at the top of the tower body 10, and the flue gas inlet 110 being located at the lower end of the tower body 10.

[0016] The storage tank 20 is connected to the tower body 10 and the spray layer 620 via a circulation pipeline 30, which drives the desulfurization liquid to circulate. The desulfurization liquid can enter the storage tank 20 through the circulation pipeline 30, and after being processed by the storage tank 20, it is transported back to the tower body 10 and the spray layer 620 to react with the flue gas.

[0017] An aeration assembly 40 is immersed in the desulfurization liquid. The aeration assembly 40 includes several aeration components 420 and a flue gas inlet pipe 410 connected to the flue gas inlet 110. The aeration components 420 are connected to the flue gas inlet pipe 410. Each aeration component 420 has several aeration holes. Of course, the aeration components 420 can also be existing aeration discs or aeration pipes; there are no restrictions as long as aeration is achieved. Flue gas is discharged through the aeration assembly 40 to the desulfurization liquid at the bottom of the tower 10 for reaction. The bubbles generated by the aeration increase the contact area between the flue gas and the desulfurization liquid. In some embodiments, the aeration assembly 40 can also be a disc-type ring-tube aeration device with publication number CN205412640U.

[0018] The aeration component 40 is equipped with a baffle component 50 at its top to extend the residence time of the flue gas in the desulfurization liquid. The baffle component 50 is also located in the desulfurization liquid; the flue gas aerated by the aeration component 40 passes through the baffle component 50, further increasing the residence and reaction time of the flue gas in the desulfurization liquid.

[0019] In use, the flue gas first enters the aeration component 40 through the flue gas inlet 110, and is aerated by the aeration component 40 before being introduced into the desulfurization liquid. It undergoes an initial reaction with the desulfurization liquid. The flue gas rises in the desulfurization liquid and passes through the baffle component 50 to increase the residence time of the flue gas in the desulfurization liquid. The flue gas that leaves the desulfurization liquid continues to rise and passes through the reaction layer 60 for a second reaction. The purified flue gas is then discharged from the tower body 10 through the flue gas outlet 120.

[0020] This application makes minimal changes to the original desulfurization tower structure. By first introducing the flue gas into the desulfurization liquid at the bottom of the tower body 10 for a preliminary reaction, the original reaction layer 60 structure of the desulfurization tower then performs a secondary reaction on the flue gas, thereby making full use of the desulfurization liquid and improving the desulfurization effect on the flue gas.

[0021] In this embodiment, the aeration component 420 is installed upside down on the top of the flue gas inlet pipe 410, and a flow guide hood is provided on the top of the aeration component 420. The aeration holes are arranged upside down on the flue gas inlet pipe 410 with their openings facing downwards to prevent impurities in the desulfurization liquid from clogging the aeration holes. The flow guide hood has a conical structure to prevent impurities from accumulating on the aeration component 420.

[0022] The baffle assembly 50 includes a fixed support 510 and a plurality of baffle plates 520 disposed on the fixed support 510. The baffle plates 520 are evenly distributed longitudinally, forming a curved air passage 500 between them. The fixed support 510 is used to fix the baffle plates 520 inside the tower body 10. The baffle plates 520 can be corrugated. The curved air passage 500 effectively prolongs the residence time of flue gas in the desulfurization liquid.

[0023] The circulation pipeline 30 includes a first circulation pipe 310 connecting the drain port to the storage tank 20, and a second circulation pipe 320 connecting the storage tank 20 to the spray layer 620 and the injection port 130. Both the first circulation pipe 310 and the second circulation pipe 320 include a connecting pipe 340 and a power assembly 330 arranged on the connecting pipe 340 for driving the flow of the desulfurization liquid. The power assembly 330 has check valves at both ends to prevent the desulfurization liquid from flowing backwards. The power assembly 330 can be a circulation pump; the connecting pipe 340 connects the drain port, the injection port 130, the spray layer 620, and the storage tank 20.

[0024] In this embodiment, the liquid storage tank 20 is provided with partitions of progressively decreasing height, which divide the liquid storage tank 20 into an inlet chamber 210, a sedimentation chamber 220, and a mixing chamber 230. The drain port is connected to the liquid storage chamber, and the mixing chamber 230 is connected to the filling port and the reaction layer 60.

[0025] The desulfurization liquid in the tower body 10 is transported to the inlet chamber 210 via the first circulation pipe 310. The inlet chamber 210 is equipped with an inclined baffle that can block impurities in the desulfurization liquid and cause them to settle at the bottom of the inlet chamber 210. The sedimentation chamber 220 can further precipitate the impurities in the desulfurization liquid overflowing from the inlet chamber 210. The mixing chamber 230 is used to adjust the concentration of the desulfurization liquid overflowing from the sedimentation chamber 220. The second circulation pipe 320 then transports the desulfurization liquid in the mixing chamber 230 to the tower body 10 and the reaction layer 60.

[0026] In some embodiments, the mixing chamber 230 is connected to a feeding mechanism, a stirring mechanism, and a water inlet. The feeding mechanism is used to add limestone solution or limestone into the mixing chamber 230, and the stirring mechanism is used to mix the limestone solution evenly.

[0027] In some embodiments, the tower body 10 is further provided with an overflow port 140 and a drain port 150; the overflow port 140 is located above the baffle assembly 50 to prevent excessive desulfurization liquid in the tower body; the drain port 150 is located at the bottom of the tower body to discharge impurities (such as gypsum) deposited at the bottom of the tower body. The drain port 150 can discharge impurities when they accumulate to a certain thickness, based on sensor detection.

Claims

1. A flue gas desulfurization device, comprising a tower body and a liquid storage tank, and a reaction layer disposed within the tower body, characterized in that: The tower contains desulfurization liquid, and the storage tank is connected to the tower and the reaction layer by a circulation pipeline. An aeration assembly submerged in the desulfurization liquid; the aeration assembly includes several aeration components and a flue gas inlet pipe connected to the flue gas inlet, the aeration components being connected to the flue gas inlet pipe; The aeration component is equipped with a baffle assembly at the top to extend the residence time of the flue gas in the desulfurization liquid.

2. The flue gas desulfurization device according to claim 1, characterized in that: The aeration components are installed upside down on the top of the smoke inlet pipe, and the top of the aeration components is provided with a flow guide hood.

3. The flue gas desulfurization device according to claim 1, characterized in that: The baffle assembly includes a fixed support and a plurality of baffle plates disposed on the fixed support; the baffle plates are evenly distributed longitudinally, and curved air passages are formed between the baffle plates.

4. The flue gas desulfurization device according to claim 3, characterized in that: The baffle plate is wavy.

5. The flue gas desulfurization device according to claim 1, characterized in that: The liquid storage tank is equipped with partitions of progressively decreasing height, which divide the liquid storage tank into an inlet chamber, a sedimentation chamber, a mixing chamber, and a storage chamber. The drain port is connected to the storage chamber, and the injection port is connected to the inlet chamber.

6. The flue gas desulfurization device according to claim 1, characterized in that: The circulation pipeline includes a first circulation pipeline and a second circulation pipeline. The first circulation pipeline connects the liquid storage tank to the tower body, and the second circulation pipeline connects the liquid storage tank to the tower body and the reaction layer.

7. The flue gas desulfurization device according to claim 6, characterized in that: Both the first circulation pipe and the second circulation pipe include a connecting pipe and a power assembly arranged on the connecting pipe for driving the flow of desulfurization liquid. Each end of the power assembly is provided with a check valve.

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