Flue gas desulfurization absorption tower

Abstract

The invention relates to the technical field of flue gas desulfurization, in particular to a flue gas desulfurization absorption tower. Comprising a tower body, a smoke inlet pipe, a flue pipe, a smoke outlet main body, a bearing disc, a leading-out disc, a spray nozzle, a feeding pipe, an air outlet screen and a collecting disc, the smoke inlet pipe is fixedly connected to the lower portion of the tower body, the flue pipe is fixedly connected to the top of the tower body, the smoke outlet body is fixedly connected to the inner wall of the flue pipe, the smoke outlet body is hollow and provided with air holes, the bearing disc is fixedly connected to the top of the flue pipe, and the leading-out disc is fixedly connected to the top of the bearing disc and communicated with the feeding pipe. The eduction tube is fixedly connected to the bottom of the bearing disc, the spray nozzle is fixedly connected to the bottom of the eduction tube, the air outlet screen is located below the spray nozzle, and the collecting disc is located below the air outlet screen. Sulfur in the flue gas can completely react, and particle impurities generated by desulfurization reaction can be collected.

Description

Technical Field

[0001] The invention relates to the technical field of flue gas desulfurization, in particular to a flue gas desulfurization absorption tower. Background Art

[0002] Desulfurization tower is a tower-type equipment for desulfurization of industrial waste gas. It is mainly used to remove sulfur oxides in waste gas. Desulfurization towers are constantly developing and have formed various types such as Venturi type, swirl plate type, swirl column type, float type, sieve plate type, pneumatic emulsification type, etc.

[0003] Wet flue gas desulfurization equipment is mainly used to treat sulfur dioxide (SO 2 ) is widely used in coal-fired power plants, steel smelting industry, non-ferrous metal smelting, chemical industry, waste incineration power plants, cement manufacturing industry, industrial boilers and self-provided power plants. The absorption tower is the core equipment of wet flue gas desulfurization equipment. Flue gas contains a large amount of gaseous sulfide. If it is not handled properly, it will seriously pollute the environment. Therefore, it must be fully desulfurized by the absorption tower before it can be discharged into the atmosphere.

[0004] For example, a Chinese patent with publication number CN207462956U discloses "a flue gas desulfurization absorption tower", in which a flue gas circulation pipe is connected between the air inlet and the air outlet of the absorption tower body, and a pH probe is arranged in the flue gas circulation pipe near the air outlet. When the pH probe measures that the pH value of the flue gas at the air outlet of the absorption tower body is highly acidic, the exhaust valve of the flue gas circulation pipe is closed, and the air inlet valve is opened, and the flue gas re-enters the absorption tower through the flue gas circulation pipe for desulfurization treatment, thereby improving the desulfurization efficiency; a porous tray is arranged inside the absorption tower, and the porous tray has a certain liquid holding capacity and has a rectifying effect on the flue gas, so that the contact reaction between the flue gas and the slurry is fully and effectively, and the desulfurization effect is more obvious; at the same time, the float level meter can realize real-time monitoring of the slurry level inside the absorption tower. When the liquid level is too high, the slurry flows out from the overflow connecting pipe to ensure the safe and normal operation of the flue gas desulfurization system. The cross-arrangement of the spray layers enables the slurry to react with the sulfides in the flue gas from all angles, avoiding the escape of flue gas and achieving a better desulfurization effect.

[0005] However, after desulfurization in the flue gas desulfurization absorption tower, the spray layer cannot completely react the sulfur in the flue gas, and sulfides still remain in the exhaust gas at a later stage, and the particulate impurities generated by the desulfurization reaction are not treated. Summary of the invention

[0006] In order to overcome the above-mentioned deficiencies of the prior art, the present invention provides a flue gas desulfurization absorption tower, which enables the sulfur in the flue gas to react completely and can collect particulate impurities generated by the desulfurization reaction.

[0007] In order to achieve the above object, the present invention adopts the following technical solutions:

[0008] A flue gas desulfurization absorption tower comprises a tower body, a smoke inlet pipe, a flue pipe, a smoke outlet body, a supporting plate, a guide plate, a spray nozzle, a feed pipe, an air outlet screen and a collecting plate; the smoke inlet pipe is fixedly connected to the lower part of the tower body, the flue pipe is fixedly connected to the top of the tower body, the smoke outlet body is fixedly connected to the inner wall of the flue pipe, the smoke outlet body is hollow and has air holes, the supporting plate is fixedly connected to the top of the flue pipe, the guide plate is fixedly connected to the top of the supporting plate, and the guide plate is connected to the feed pipe; the guide pipe is fixedly connected to the bottom of the supporting plate, the spray nozzle is fixedly connected to the bottom of the guide pipe, the air outlet screen is located below the spray nozzle, and the collecting plate is located below the air outlet screen.

[0009] Furthermore, it also includes a second booster pump, one end of the feed pipe is connected to the lead-out plate, and the other end is connected to the second booster pump.

[0010] The desulfurization agent is delivered to the outlet plate through the delivery pipe by the second booster pump.

[0011] Furthermore, it also includes a connecting pipe and a first booster pump, one end of the connecting pipe is connected to the spray nozzle, and the other end is connected to the first booster pump.

[0012] The first booster pump pressurizes the spray nozzle through the connection of the connecting pipe and the outlet pipe to improve the atomization effect, enhance the uniformity of the agent coverage, improve the spraying efficiency, and shorten the operation time.

[0013] It also includes a smoke exhaust pipe, which is located at the top of the flue gas desulfurization absorption tower, and the smoke inlet pipe is horizontally fixed to the outer wall of the lower part of the tower body.

[0014] The desulfurized gas is discharged through the smoke exhaust pipe, and the smoke is sent into the tower body through the smoke inlet pipe.

[0015] Furthermore, it also includes an oblique air duct and a blower. The oblique air duct is fixedly connected to the inner wall of the tower body and is located at the smoke inlet pipe. The oblique air duct is connected to the blower pipeline, and the blower is located outside the tower body.

[0016] The blower draws air from the outside and blows it obliquely upward through the oblique air pipe to the top of the tower body.

[0017] Furthermore, it also includes an inclined lane plate, the air outlet screen is fixedly connected to the inner wall of the tower body and is located above the inclined air pipe; the inclined lane plate is fixedly connected to the inner wall of the tower body and is located above the air outlet screen.

[0018] The air outlet screen uses a grid in the middle and a ring around it, which is convenient for guiding the particles produced by the desulfurization reaction to fall into the collection plate below. The inclined lane plate spirals the upward airflow, which on the one hand increases the efficiency of the airflow, and on the other hand blows the particles produced by the desulfurization reaction to the periphery for easy guidance by the air outlet screen.

[0019] Furthermore, the collecting plate is fixedly connected to the bottom of the tower body.

[0020] Furthermore, it also includes a support frame, which is fixed to the bottom of the collection tray.

[0021] The particulate impurities produced by the desulfurization reaction fall to the collection tray below by gravity, and the support frame supports the entire equipment.

[0022] Furthermore, the utility model further comprises a baffle plate, which is hinged to the outer wall of the collecting tray through a hinge, and the hinge facilitates the baffle plate to be rotated and opened, and the inside of the collecting tray can be cleaned after the baffle plate is opened.

[0023] Compared with the prior art, the present invention has the following beneficial effects:

[0024] 1. In the present invention, the flue gas enters the tower body through the smoke inlet pipe, and the desulfurization agent is sprayed out through the spray nozzle by connecting the desulfurization plate to the desulfurization pipe to carry out chemical reaction and desulfurize the flue gas once.

[0025] The flue gas after the first desulfurization enters the flue pipe upward. The flue pipe and the smoke outlet body are integrated. The smoke outlet body is hollow, and the smoke is carried out by the air holes. A part of the desulfurization agent will be left on the supporting plate. The liquid level position is consistent with the lower edge of the smoke outlet body and the upper surface of the guide plate. The sulfide impurities remaining in the smoke outlet body after the first desulfurization at the spray nozzle are desulfurized in this step. In this way, the liquid level position of the supporting plate will not be too high, so that high air pressure is required for the smoke to come out, but the smoke can contact the desulfurization agent, so that the sulfur in the flue gas can react completely.

[0026] The particulate impurities generated by the desulfurization reaction are guided by the air outlet screen to the collection plate for collection.

[0027] 2. The present invention is provided with a first booster pump and a second booster pump, and the desulfurization agent is introduced into the outlet plate from the feed pipe through the second booster pump. The first booster pump pressurizes the spray nozzle through the connection of the connecting pipe and the outlet pipe to ensure better operation of the desulfurization agent in the spray nozzle.

[0028] 3. The smoke exhaust pipe of the present invention is located at the top of the flue gas desulfurization absorption tower, and the desulfurized gas is discharged through the smoke exhaust pipe.

[0029] 4. The air outlet screen of the present invention adopts a grid in the middle and a ring-shaped periphery, which is convenient for guiding the particles produced by the desulfurization reaction to fall into the collection plate below. The inclined lane plate spirally operates the airflow sent up, which on the one hand increases the efficiency of the airflow, and on the other hand blows the particles produced by the desulfurization reaction to the periphery, which is convenient for guiding the air outlet screen.

[0030] 5. The particulate impurities generated by the desulfurization reaction of the present invention fall into the collection tray below by gravity, and the baffle is hinged to the outer wall of the collection tray by a hinge. The hinge facilitates the baffle to rotate and open, and the inside of the collection tray can be cleaned after the baffle is opened. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] Figure 1It is a schematic diagram of the three-dimensional structure of the present invention.

[0032] Figure 2 It is a schematic diagram of the three-dimensional structure from another angle of the present invention.

[0033] Figure 3 This is an exploded view of a three-dimensional structure of a part of the present invention.

[0034] Figure 4 This is another partial exploded view of the three-dimensional structure of the present invention.

[0035] Figure 5 It is a schematic diagram of the three-dimensional structure of the reaction part of the present invention.

[0036] Markings in the figure: 1. tower body; 2. flue pipe; 3. smoke outlet body; 4. guide plate; 5. bearing plate; 6. guide pipe; 7. spray nozzle; 8. inclined lane plate; 9. air outlet screen; 10. connecting pipe; 11. first booster pump; 12. feeding pipe; 13. second booster pump; 14. collecting plate; 15. supporting frame; 16. smoke exhaust pipe; 17. smoke inlet pipe; 18. blower; 19. oblique air pipe; 20. hinge; 21. baffle; 22. air hole. DETAILED DESCRIPTION

[0037] The embodiments of the present invention are described in detail below. In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described in combination with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. The following description of at least one exemplary embodiment is actually only illustrative and is by no means intended to limit the present invention and its application or use. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0038] In the description of the present invention, it is to be understood that the terms “center”, “longitudinal”, “lateral”, “length”, “width”, “thickness”, “up”, “down”, “left”, “right”, “vertical”, “horizontal”, “top”, “bottom”, “inside”, “outside”, “axial”, “radial”, “circumferential”, etc., indicating orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0039] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a direct connection, or an indirect connection through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0040] In the description of the present invention, it should be noted that the terms used herein are only for describing specific embodiments, and are not intended to limit the exemplary embodiments according to the present invention. As used herein, unless the context clearly indicates otherwise, the singular form is also intended to include the plural form. In addition, it should be understood that when the terms "comprise" and / or "include" are used in this specification, it indicates the presence of features, steps, operations, devices, components and / or combinations thereof.

[0041] Unless otherwise specifically stated, the relative arrangement of the parts and steps described in these embodiments, numerical expressions and numerical values ​​do not limit the scope of the present invention. At the same time, it should be clear that, for ease of description, the sizes of the various parts shown in the drawings are not drawn according to the actual proportional relationship. The technology, methods and equipment known to ordinary technicians in the relevant field may not be discussed in detail, but in appropriate cases, the technology, methods and equipment should be regarded as a part of the authorization specification. In all examples shown and discussed here, any specific value should be interpreted as merely exemplary, rather than as a limitation. Therefore, other examples of exemplary embodiments may have different values. It should be noted that similar reference numerals and letters represent similar items in the following drawings, so once an item is defined in one drawing, it does not need to be further discussed in subsequent drawings.

[0042] In addition, it should be noted that the use of terms such as "first" and "second" to limit components is only for the convenience of distinguishing the corresponding components. If not otherwise stated, the above terms have no special meaning and therefore cannot be understood as limiting the scope of protection of the present invention.

[0043] Reference Figure 1-5 A flue gas desulfurization absorption tower comprises a tower body 1, a flue pipe 2 is welded on the top of the tower body 1, a smoke outlet body 3 is arranged on the inner wall of the flue pipe 2, a supporting plate 5 is welded on the outer edge of the top surface of the flue pipe 2, a guide plate 4 is welded on the top of the supporting plate 5, a guide pipe 6 is welded on the bottom of the supporting plate 5, and a spray nozzle 7 is fixedly connected to the bottom of the guide pipe 6.

[0044] The airflow is led out to the supporting plate 5 through the flue pipe 2 and the smoke outlet body 3. The lower edge of the smoke outlet body 3 is in line with the upper surface of the outlet plate 4. The supporting plate 5 is connected to the outlet pipe 6 to spray the desulfurization agent through the spray nozzle 7 to carry out a chemical reaction. The first booster pump 11 pressurizes the spray nozzle 7 through the connection with the connecting pipe 10 and the outlet pipe 6 to ensure better operation of the desulfurization agent in the spray nozzle 7.

[0045] The interior of the smoke outlet body 3 is hollow, and an air hole 22 is provided on the top edge. The smoke is brought out by the air hole 22, and a portion of the desulfurization agent will remain on the supporting plate 5. The liquid level is consistent with the lower edge of the smoke outlet body and the upper surface of the guide plate 4 in a horizontal plane. The sulfide impurities remaining after the first desulfurization of the smoke are further desulfurized in the smoke outlet body 3. In this way, the liquid level position of the supporting plate 5 is not too high, so that high air pressure is required for the smoke to come out, but the smoke can contact the desulfurization agent, so that the sulfur in the smoke can react completely.

[0046] Reference Figure 1-5 The lead-out plate 4 is fixedly connected with a feed pipe 12 , and one end of the feed pipe 12 away from the smoke outlet body 3 is fixedly connected with a second booster pump 13 .

[0047] The desulfurization agent is introduced into the outlet disk 4 through the feed pipe 12 by the second booster pump 13 .

[0048] Reference Figure 1-5 The spray nozzle 7 is fixedly connected to a connecting pipe 10 , and one end of the connecting pipe 10 away from the spray nozzle 7 is fixedly connected to a first boosting pump 11 .

[0049] The first booster pump 11 pressurizes the spray nozzle 7 by connecting with the connecting pipe 10 and the outlet pipe 6 to ensure better operation of the desulfurization agent in the spray nozzle 7 .

[0050] Reference Figure 1-5 A smoke exhaust pipe 16 is fixedly connected to the top of the tower body 1, and a horizontal smoke inlet pipe 17 is fixedly connected to the lower part of the side wall of the tower body 1.

[0051] The smoke exhaust pipe 16 facilitates the desulfurized flue gas to be discharged, and the flue gas is sent into the tower body 1 through the smoke inlet pipe 17 .

[0052] Reference Figure 1-5 At a position of the tower body 1 corresponding to the smoke inlet pipe 17 , an oblique air pipe 19 is fixedly connected to the inner wall, and the oblique air pipe 19 is connected to the blower 18 .

[0053] The blower 18 draws air from the outside and blows it obliquely upward through the oblique air pipe 19 to the top of the tower body 1 .

[0054] Reference Figure 1-5 An air outlet screen 9 is fixedly connected to the inner wall of the tower body 1 above the oblique air pipe 19, and an oblique lane plate 8 is welded to the inner wall of the tower body 1.

[0055] The air outlet screen 9 adopts a grid in the middle, and the peripheral ring shape facilitates the particles dropped by the desulfurization reaction to fall into the collection plate 14 below. The inclined lane plate 8 facilitates the spiral operation of the sent airflow, which on the one hand increases the efficiency of the airflow, and on the other hand blows the particles dropped by the desulfurization reaction to the periphery, which is convenient for the air outlet screen 9 to guide.

[0056] A collecting tray 14 is welded to the bottom of the tower body 1 , and a supporting frame 15 is welded to the bottom of the collecting tray 14 .

[0057] The particulate impurities generated by the desulfurization reaction fall to the collection tray 14 below by gravity, and the support frame 15 supports the entire device.

[0058] The baffle 21 is mounted on the outer wall of the collection tray 14 via a hinge 20 . The hinge 20 facilitates the baffle 21 to be rotated and opened. By opening the baffle 21 , the inside of the collection tray 14 can be easily cleaned.

[0059] The working principle and working process of the present invention are as follows:

[0060] In the present invention, the flue gas enters the tower body 1 through the smoke inlet pipe 17, and the desulfurization agent is sprayed out through the spray nozzle 7 by the outlet plate 4 connected to the outlet pipe 6 to perform a chemical reaction and perform a primary desulfurization on the flue gas. The booster pump 11 pressurizes the spray nozzle 7 through the connection of the connecting pipe 10 and the outlet pipe 6 to improve the atomization effect, enhance the uniformity of the agent coverage, improve the spraying efficiency, and shorten the operation time.

[0061] The flue gas after the first desulfurization enters the flue pipe 2 upward. The flue pipe 2 and the smoke outlet body 3 are integrated. The smoke outlet body is hollow. The flue gas is carried out by the air hole 22. A part of the desulfurization agent will be left on the supporting plate. The liquid level position is consistent with the lower edge of the smoke outlet body and the upper surface of the lead-out plate in the same horizontal plane. The sulfide impurities remaining after the first desulfurization of the flue gas are further desulfurized in the smoke outlet body 3. In this way, the liquid level position of the supporting plate is not too high, so that high air pressure is required for the flue gas to come out, but the flue gas can contact the desulfurization agent, so that the sulfur in the flue gas can react completely.

[0062] The blower 18 draws air from the outside and blows it obliquely upward through the oblique air pipe 19 to the top of the tower body 1. The air outlet screen 9 uses a grid in the middle, and the peripheral ring is convenient for guiding the particles dropped by the desulfurization reaction to the collection tray 14 below. By opening the baffle 21, it is convenient to clean the inside of the collection tray 14. The inclined lane plate 8 facilitates the spiral operation of the sent airflow. On the one hand, it increases the efficiency of the airflow, and on the other hand, it blows the particles dropped by the desulfurization reaction to the periphery, which is convenient for the air outlet screen 9 to guide.

[0063] The desulfurized gas is discharged from the equipment through the exhaust pipe 16.

[0064] The present invention enables sulfur in flue gas to react completely and can collect particulate impurities generated by the desulfurization reaction.

[0065] The above descriptions are only some specific implementation methods of the present invention, and the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes according to the technical solutions and inventive concepts of the present invention within the technical scope disclosed by the present invention, and they should be covered by the protection scope of the present invention.

Claims

1. A flue gas desulfurization absorption tower, characterized in that: It includes a tower body, a smoke inlet pipe, a flue pipe, a smoke outlet body, a carrying plate, a guide plate, a spray nozzle, a feed pipe, an air outlet screen and a collecting plate; The smoke inlet pipe is fixedly connected to the lower part of the tower body, the flue pipe is fixedly connected to the top of the tower body, the smoke outlet body is fixedly connected to the inner wall of the flue pipe, the smoke outlet body is hollow and has air holes, the supporting plate is fixedly connected to the top of the flue pipe, the outlet plate is fixedly connected to the top of the supporting plate, and the outlet plate is connected to the feeding pipe; The outlet pipe is fixedly connected to the bottom of the carrying plate, the spray nozzle is fixedly connected to the bottom of the outlet pipe, the air outlet screen is located below the spray nozzle, and the collecting plate is located below the air outlet screen.

2. A flue gas desulfurization absorption tower according to claim 1, characterized in that: It also includes a second booster pump. One end of the feed pipe is connected to the lead-out plate, and the other end is connected to the second booster pump.

3. A flue gas desulfurization absorption tower according to claim 1, characterized in that: It also includes a connecting pipe and a first booster pump, one end of the connecting pipe is connected to the spray nozzle, and the other end is connected to the first booster pump.

4. A flue gas desulfurization absorption tower according to claim 1, characterized in that: It also includes a smoke exhaust pipe, which is located at the top of the flue gas desulfurization absorption tower, and the smoke inlet pipe is horizontally fixed to the outer wall of the lower part of the tower body.

5. A flue gas desulfurization absorption tower according to claim 1, characterized in that: It also includes an oblique air duct and a blower. The oblique air duct is fixedly connected to the inner wall of the tower body and is located at the smoke inlet pipe. The oblique air duct is connected to the blower pipeline, and the blower is located outside the tower body.

6. A flue gas desulfurization absorption tower according to claim 5, characterized in that: It also includes an inclined lane plate, an air outlet screen is fixedly connected to the inner wall of the tower body and is located above the inclined air pipe; the inclined lane plate is fixedly connected to the inner wall of the tower body and is located above the air outlet screen.

7. A flue gas desulfurization absorption tower according to claim 1, characterized in that: The collecting plate is fixedly connected to the bottom of the tower body.

8. A flue gas desulfurization absorption tower according to claim 7, characterized in that: It also includes a support frame, which is fixed to the bottom of the collection tray.

9. A flue gas desulfurization absorption tower according to claim 1, characterized in that: The utility model also comprises a baffle plate which is hinged to the outer wall of the collecting tray through a hinge.

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