SO2 conversion tower
By using top-down heat pipe heat exchanger and porcelain ball layer distribution in the SO2 conversion tower, the existing equipment has large footprint and uneven gas distribution has been solved, and a compact and efficient SO2 conversion tower design has been achieved. , ensuring stable operation and efficient heat exchange of equipment.
Patent Information
- Application Number
- CN202420700116.5
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-04-07
- Publication Date
- 2025-01-07
- Estimated Expiration
- Not applicable · inactive patent
AI Technical Summary
The existing SO2 converter equipment requires external and process gas heat exchange due to high-temperature process gas, which covers a large area, has a large number of heat exchangers, has a long pipeline, and is unevenly distributed gas, resulting in large heights and unstable operation.
A compact SO2 conversion tower is designed, using a top-down heat pipe heat exchanger, which supports the heat exchange tube by connecting the pipe, and uses a porcelain ball layer to ensure uniform distribution of the gas, and adds a heater to ensure that the flue gas temperature reaches the catalyst. Conversion temperature.
The equipment has a compact structure, small footprint, low height, uniform gas distribution, stable operation, high heat exchange efficiency, and convenient installation and disassembly.
Smart Images
Figure CN222305334U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of acid production, in particular to a SO2 conversion tower. Background Art
[0002] In the acid production process of incineration of low-quality sulfur and by-salt waste liquid, the purified SO2 process gas sent to the conversion process by the SO2 acid gas blower passes through the process gas heat exchanger and is heat exchanged with the high-temperature process gas coming out of the catalytic bed layers of each section of the SO2 converter to 420-450°C before entering the SO2 converter. Under the action of the catalyst, SO2 is converted into SO3 through dry contact catalytic oxidation.
[0003] At present, the high-temperature process gas coming out of each catalytic bed of the SO2 converter needs to exchange heat with the SO2 process gas outside the device, which occupies a large area, has a large number of heat exchangers, and has long pipelines. Moreover, since the high-temperature process gas needs to be drawn out from the side wall of the device body at the bottom of the catalyst layer, a gas isolation layer is added in the middle, and it needs to be introduced from the side wall of the device body at the top of the next catalyst layer, the distance between the catalyst layers is large, the gas distribution is uneven, and the overall height of the equipment is large. Utility Model Content
[0004] In order to overcome the deficiencies of the prior art, the utility model provides a SO2 conversion tower with compact structure, small footprint, low overall height, uniform gas distribution and stable operation.
[0005] In order to achieve the above purpose, the utility model adopts the following technical solutions:
[0006] A SO2 conversion tower comprises a tower body and heat exchangers I to IV arranged on the tower body from top to bottom; the tower body is a vertically arranged cylindrical container, with a first inlet provided on the top, a second inlet and a first outlet provided on the tower body between the heat exchanger III and the heat exchanger IV, and a second outlet provided on the tower body below the heat exchanger IV; the outlet of the heat exchanger I is connected to the first inlet, the inlet of the heat exchanger I is connected to the outlet of the heat exchanger IV, the inlet of the heat exchanger II is connected to the outlet of the heat exchanger III, the outlet of the heat exchanger II is connected to the second inlet, the inlet of the heat exchanger III is connected to a first absorption tower of a dry absorption section, the inlet of the heat exchanger IV is connected to a SO2-containing flue gas pipeline from a SO2 blower, and the outlet of the heat exchanger IV is connected to a second absorption tower of the dry absorption section, and the above connection is pipeline connection; the heat exchangers I to IV are all heat pipe type, and catalyst layers are provided between them, and a catalyst layer is provided above the heat exchanger I.
[0007] Furthermore, a heater is provided on the first inlet.
[0008] Furthermore, the tower body is a circular cylinder, and the shells of the heat exchangers I to IV are rectangular parallelepipeds with hollow interiors.
[0009] Furthermore, the heat exchangers I to IV have the same structure, including a shell and heat exchange tubes, multiple heat exchange tubes are arranged in parallel in the shell, the heat exchange tubes are vertically inclined, and the shell is symmetrically provided with inlets and outlets perpendicular to the heat exchange tubes.
[0010] Furthermore, a conical transition section is provided at the inlet and the outlet.
[0011] Furthermore, it also includes a first connecting tube, a second connecting tube and a third connecting tube for supporting the heat exchange tube, both ends of the second connecting tube are connected to the heat exchange tube, one end of the first connecting tube is connected to the heat exchange tube, and the other end is connected to the wire plug, and one end of the third connecting tube is connected to the heat exchange tube, and the other end is connected to the wire plug.
[0012] Furthermore, the heat exchange tube consists of an evaporation section, an insulation section and a condensation section. Fins are evenly distributed on the outside of the tube body of the evaporation section and the condensation section, and a heat insulation layer is provided on the outside of the tube body of the insulation section.
[0013] Furthermore, it also includes a gas distribution and dust removal layer, which is located above the topmost catalyst layer. The gas distribution and dust removal layer includes a ceramic ball support and ceramic balls. The ceramic ball support is fixed to the tower body, and multiple ceramic balls are placed on the ceramic ball support to form a ceramic ball layer.
[0014] Furthermore, the catalyst layer includes an upper layer and a lower layer of porcelain balls, and the catalyst is placed between the upper layer and the lower layer of porcelain balls.
[0015] Compared with the prior art, the utility model has at least the following technical effects or advantages:
[0016] 1. The utility model arranges heat exchangers I to IV from top to bottom on the tower body, the first inlet is arranged on the top of the tower body, the second inlet and the first outlet are arranged on the tower body between the third heat exchanger and the fourth heat exchanger, and the second outlet is arranged on the tower body below the fourth heat exchanger. Moreover, the outlet of the first heat exchanger is connected to the first inlet, the inlet of the first heat exchanger is connected to the outlet of the fourth heat exchanger, the inlet of the second heat exchanger is connected to the outlet of the third heat exchanger, the outlet of the second heat exchanger is connected to the second inlet, the inlet of the third heat exchanger is connected to the first absorption tower of the dry absorption section, the inlet of the fourth heat exchanger is connected to the SO2-containing flue gas pipeline from the SO2 blower, and the outlet of the fourth heat exchanger is connected to the second absorption tower of the dry absorption section; the heat exchangers I to IV are all heat pipe type, and catalyst layers are arranged between them, and a catalyst layer is arranged above the first heat exchanger.
[0017] The whole device has a compact structure, small footprint, few heat exchangers, short pipes and low overall height.
[0018] 2. The heat exchangers I to IV of the utility model are all heat pipe type, and the heat exchange tubes are supported and connected by connecting pipes; they are easy to install and disassemble.
[0019] 3. The utility model adopts porcelain balls as gas distribution and dust removal layers to ensure uniform gas distribution and stable operation of the conversion tower.
[0020] 4. The heat exchange tube of the utility model is composed of an evaporation section, an insulation section and a condensation section. The evaporation section and the condensation section are evenly distributed with fins on the outside of the tube body, and the insulation section is provided with an insulation layer on the outside of the tube body. The heat exchange effect is good and the heat exchange efficiency is high.
[0021] 5. A heater is provided at the first inlet of the utility model to ensure that the temperature of the flue gas entering the tower body reaches the catalyst conversion temperature. BRIEF DESCRIPTION OF THE DRAWINGS
[0022] Figure 1 It is a schematic front view of the structure of the utility model.
[0023] Figure 2 yes Figure 1 AA section view.
[0024] Figure 3 yes Figure 1 BB cross-sectional view.
[0025] Figure 4 yes Figure 1 CC cross-sectional view.
[0026] Figure 5 yes Figure 1 DD cross-sectional view.
[0027] Figure 6 It is a schematic diagram of the heat exchange tube structure.
[0028] Figure 7 It is a schematic diagram of the structure of the first and third connecting pipes.
[0029] Figure 8 2 is a schematic diagram of the structure of the second connecting pipe.
[0030] Fig. 9 2 is a schematic diagram of the structure of the first installation tool.
[0031] Fig.10 2 is a schematic diagram of the structure of the second installation tool.
[0032] In the figure: 1-skirt 2-lower head 3-cylinder 4-manhole 5-IV heat exchanger 6-catalyst layer support 7-catalyst layer ceramic ball 8-catalyst 9-partition 10-III heat exchanger 11-II heat exchanger 12-I heat exchanger 13-ceramic ball support 14-ceramic ball 15-upper head 16-electric heater 17-electric heater gas inlet 18-first gas inlet 19-first gas outlet 20-second gas inlet 21 second gas outlet 22-emptying port 23-first installation tool 24-second installation tool 31-first connecting pipe 32-first wire plug 33-tube sheet 34-side plate 35-heat exchange tube 36-second connecting pipe 37-cone section 37 38-third connecting pipe 39-second plug 40-first plugging plate 41-second plugging plate 42-I heat exchanger smoke outlet 43-I heat exchanger smoke inlet 44-II heat exchanger smoke outlet 45-II heat exchanger smoke inlet 46-III heat exchanger smoke outlet 47-III heat exchanger smoke inlet 48-IV heat exchanger smoke outlet 49-IV heat exchanger smoke inlet 51-end 52-first connecting short pipe 53-support plate 54-fin 55-insulating material 56-baffle 57-seamless pipe 58-working medium 59-second connecting short pipe 100-evaporation section 101-insulation section 102-condensation section DETAILED DESCRIPTION
[0033] 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 in 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.
[0034] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width" and "
[0035] The directions or positional relationships indicated by terms such as “degree”, “thickness”, “up”, “down”, “left”, “right”, “vertical”, “horizontal”, “top”, “bottom”, “inside”, “outside”, “axial”, “radial” and “circumferential” are based on the directions or positional relationships shown in the drawings and are only for the convenience of describing the present invention and simplifying the description. They do not indicate or imply that the devices or elements referred to must have a specific direction, be constructed and operate in a specific direction. Therefore, they should not be understood as limitations on the present invention.
[0036] In the description of the present utility model, 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 connection of two elements.
[0037] For those skilled in the art, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances.
[0038] In the description of the utility model, 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 utility model. 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.
[0039] Unless otherwise specifically stated, the relative arrangement of the parts and steps described in these embodiments, the numerical expressions and numerical values do not limit the scope of the utility model. 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 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 numbers 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.
[0040] 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 utility model.
[0041] [Example]
[0042] like Figure 1-10 As shown, an SO2 converter includes a skirt 1, a lower head 2, a cylinder 3, a manhole 4, a fourth heat exchanger 5, a catalyst layer support 6, a catalyst layer ceramic ball 7, a catalyst 8, a partition 9, a third heat exchanger 10, a second heat exchanger 11, a first heat exchanger 12, a ceramic ball support 13, a ceramic ball 14, an upper head 15, an electric heater 16, an electric heater gas inlet 17, a first gas inlet 18, a first gas outlet 19, a second gas inlet 20, a second gas outlet 21, an exhaust port 22, a first installation tool 23 and a second installation tool 24.
[0043] The cylinder 3 is a cylinder, and the skirt 1, the lower head 2, the cylinder 3, and the upper head 15 are fixedly connected from bottom to top to form a tower body. Multiple manholes 4 are fixedly connected to the cylinder 3, and the exhaust port 22 is fixedly connected to the bottom of the lower head 2. The IV heat exchanger 5, the III heat exchanger 10, the II heat exchanger 11, and the I heat exchanger 12 are installed on the tower body from bottom to top. The IV heat exchanger 5, the III heat exchanger 10, the II heat exchanger 11, and the I heat exchanger 12 are all heat pipe types, and a catalyst layer is provided between them, and a catalyst layer is provided above the I heat exchanger 12.
[0044] The catalyst layer includes upper and lower catalyst layer ceramic balls 7, and the catalyst 8 is placed between the upper and lower catalyst layer ceramic balls 7. The catalyst layer support 6 is fixed to the inner wall of the cylinder 3 to support the catalyst layer. The gas distribution and dust removal layer is located above the uppermost catalyst layer. The gas distribution and dust removal layer includes a ceramic ball support 13 and ceramic balls 14. The ceramic ball support 13 is fixed to the inner wall of the cylinder 3. A plurality of ceramic balls 14 are placed on the ceramic ball support 13 to form a ceramic ball layer. After the gas is evenly distributed, it enters the catalyst layer.
[0045] The first gas inlet 18 is fixed to the top of the upper head 15, and the first gas inlet 18 is connected to the electric heater 16, and the electric heater 16 is provided with an electric heater gas inlet 17. The first gas outlet 19 and the second gas inlet 20 are fixed to the cylinder 3 one above and one below, and are located between the III heat exchanger 10 and the IV heat exchanger 5. A partition 9 is provided in the cylinder 3 between the first gas outlet 19 and the second gas inlet 20. The second gas outlet 21 is fixed to the cylinder 3 and is located below the IV heat exchanger 5.
[0046] The first heat exchanger 12 includes a first connecting pipe 31, a first plug 32, a tube sheet 33, a side plate 34, a heat exchange tube 35, a second connecting pipe 36, a cone section 37, a third connecting pipe 38, a second plug 39, a first plugging plate 40, a second plugging plate 41, a first heat exchanger smoke outlet 42, and a first heat exchanger smoke inlet 43. The first connecting pipe 31 is an internal threaded pipe, which is matched with the external thread of the first plug 32; the third connecting pipe 38 is an internal threaded pipe, which is matched with the external thread of the second plug 39; the second connecting pipe 36 is a seamless steel pipe; after installation, the first connecting pipe 31, the third connecting pipe 38, and the second connecting pipe 36 are concentric and vertically inclined at a certain angle. After the heat exchange tube 35 is installed, it is supported by these three places. The first heat exchanger smoke outlet 42 is connected to the electric heater gas inlet 17 through a pipeline; the first heat exchanger smoke inlet 43 is connected to the fourth heat exchanger smoke outlet 48 through a pipeline. After heat exchange, the flue gas inside the equipment directly enters the next catalyst layer. The first plugging plate 40 and the second plugging plate 41 are used to connect the circular cylinder and the square tube sheet 33 and the side plate 34 to form a closed structure. The plane orientation of the first heat exchanger 12 is determined according to the pipeline installation.
[0047] The II heat exchanger 11 includes a first connecting pipe 31, a first plug 32, a tube sheet 33, a side plate 34, a heat exchange tube 35, a second connecting pipe 36, a cone section 37, a third connecting pipe 38, a second plug 39, a first plug 40, a second plug 41, a flue gas outlet 44 of the II heat exchanger, and a flue gas inlet 45 of the II heat exchanger. The first connecting pipe 31 is an internally threaded pipe, which cooperates with the external thread of the first plug 32; the third connecting pipe 38 is an internally threaded pipe, which cooperates with the external thread of the second plug 39; the second connecting pipe 36 is a seamless steel pipe; after installation, the first connecting pipe 31, the third connecting pipe 38, and the second connecting pipe 36 are concentric and inclined at a certain angle. After the heat exchange tube 35 is installed, it is supported by these three places. The flue gas outlet 44 of the II heat exchanger is connected to the second gas inlet 20 through a pipeline; the flue gas inlet 45 of the II heat exchanger is connected to the flue gas outlet 46 of the III heat exchanger through a pipeline. After heat exchange inside the equipment, the flue gas directly enters the next catalyst layer. The first plugging plate 40 and the second plugging plate 41 are used to connect the circular cylinder and the square tube sheet 33 and the side plate 34 to form a closed structure. The plane orientation of the heat exchanger 11 is determined according to the pipeline installation.
[0048] The III heat exchanger 10 includes a first connecting pipe 31, a first plug 32, a tube sheet 33, a side plate 34, a heat exchange tube 35, a second connecting pipe 36, a cone section 37, a third connecting pipe 38, a second plug 39, a first plugging plate 40, a second plugging plate 41, a III heat exchanger flue gas outlet 46, and a III heat exchanger flue gas inlet 47. The first connecting pipe 31 is an internally threaded pipe, which is matched with the external thread of the first plug 32; the third connecting pipe 38 is an internally threaded pipe, which is matched with the external thread of the second plug 39; the second connecting pipe 36 is a seamless steel pipe; after installation, the first connecting pipe 31, the third connecting pipe 38, and the second connecting pipe 36 are concentric and inclined at a certain angle. After the heat exchange tube 35 is installed, it is supported by these three places. The III heat exchanger flue gas outlet 46 is connected to the II heat exchanger flue gas inlet 45 through a pipeline; the III heat exchanger flue gas inlet 47 is connected to the flue gas from the first absorption tower of the dry absorption section through a pipeline. After heat exchange, the flue gas inside the equipment directly enters the first gas outlet 19 and is sent to the first absorption tower of the dry absorption section. The first plugging plate 40 and the second plugging plate 41 are used to connect the circular cylinder and the square tube sheet 33 and the side plate 34 to form a closed structure. The plane orientation of the third heat exchanger 10 is determined according to the pipeline installation.
[0049] The IV heat exchanger 5 includes a first connecting pipe 31, a first plug 32, a tube sheet 33, a side plate 34, a heat exchange tube 35, a second connecting pipe 36, a cone section 37, a third connecting pipe 38, a second plug 39, a first plugging plate 40, a second plugging plate 41, a flue gas outlet 48 of the IV heat exchanger, and a flue gas inlet 49 of the IV heat exchanger. The first connecting pipe 31 is an internally threaded pipe, which is matched with the external thread of the first plug 32; the third connecting pipe 38 is an internally threaded pipe, which is matched with the external thread of the second plug 39; the second connecting pipe 36 is a seamless steel pipe; after installation, the first connecting pipe 31, the third connecting pipe 38, and the second connecting pipe 36 are concentric and inclined at a certain angle, and the heat exchange tube 35 is supported by these three places after installation. The flue gas outlet 48 of the IV heat exchanger is connected to the flue gas inlet 43 of the I heat exchanger through a pipeline; the flue gas inlet 49 of the IV heat exchanger is connected to the flue gas from the sulfur dioxide blower through a pipeline. After heat exchange, the flue gas inside the equipment directly enters the second gas outlet 21 and is sent to the second absorption tower of the dry absorption section. The first plugging plate 40 and the second plugging plate 41 are used to connect the circular cylinder and the square tube sheet 33 and the side plate 34 to form a closed structure. The plane orientation of the IV heat exchanger 5 is determined according to the pipeline installation.
[0050] The heat exchange tube 35 is in the form of a heat pipe, which is, from left to right, an evaporation section 100, an insulation section 101, and a condensation section 102, and includes a head 51, a first connecting short tube 52, a support plate 53, a fin 54, a heat insulating material 55, a baffle 56, a seamless tube 57, a working medium 58, and a second connecting short tube 59. The first connecting short tube 52 and the second connecting short tube 59 are externally threaded, and the inner diameter is slightly larger than the outer diameter of the seamless tube 57. The support plate 53 and the baffle 56 are ring plates, and the inner diameter is slightly larger than the outer diameter of the seamless tube 57. Among them, the fin 54 is welded to the seamless tube 57, the baffle 56 is welded to the seamless tube 57, the first connecting short tube 52 and the support plate 53 are welded to the seamless tube 57, and after the heat insulating material 55 is installed, the outer diameter is similar to that of the support plate 53, and a tapered transition is made at the connection with the baffle 56. After the heat exchange tube 35 is installed, it is fastened to the third connecting tube 38 through the second plug 39, acting on the end cap 51, and the conical transition section of the heat insulation material 55 is pressed and sealed at the second connecting tube 36. Finally, the first plug 32 is fastened at the first connecting tube 31 without contacting the end cap 51.
[0051] The first installation tool 23 and the second installation tool 24 are seamless steel pipes, with an outer diameter slightly smaller than the inner diameter of the first connecting pipe 31, and an inner thread at the end, which cooperates with the outer thread of the first connecting short pipe 52. The length of the first installation tool 23 is slightly larger than the length of the heat exchange tube 35, and the length of the second installation tool 24 is slightly shorter, which acts as a handle. During installation, the end thread of the first installation tool 23 is fastened to the first connecting short pipe 52, and the second installation tool 24 is fastened to the second connecting short pipe 59. When the first installation tool 23 is used to repair and replace the heat exchange tube, the end thread of the first installation tool 23 is fastened to the first connecting short pipe 52, and the second installation tool 24 is fastened to the second connecting short pipe 59. The first installation tool 23 is pushed, and the heat exchange tube passes through the third connecting pipe 38, the second connecting pipe 36, and the first connecting pipe 31. After the heat exchange tube 35 is removed, the first installation tool 23 and the second installation tool 24 are removed.
[0052] The working principle and working process of the utility model are as follows:
[0053] 1. The flue gas containing SO2 from the SO2 blower enters the flue gas inlet 49 of the IV heat exchanger, undergoes heat exchange in the IV heat exchanger 5, flows out from the flue gas outlet 48 of the IV heat exchanger, enters the flue gas inlet 43 of the I heat exchanger, undergoes heat exchange in the I heat exchanger 12, and flows out from the flue gas outlet 42 of the I heat exchanger.
[0054] 2. Then it enters the electric heater gas inlet 17. When the flue gas temperature has not reached the catalyst conversion temperature or just started, turn on the electric heater 16 to ensure that the flue gas temperature reaches the catalyst conversion temperature. The flue gas enters the gas distribution and dust removal layer from the top of the SO2 conversion tower. After gas distribution and dust removal, the gas is evenly distributed and then enters the catalyst layer. The temperature rises after the reaction.
[0055] 3. The gas enters the first heat exchanger 12, and the flue gas temperature decreases after heat exchange in the first heat exchanger 12. The gas enters the catalyst layer, and the temperature increases after the reaction. The gas enters the second heat exchanger 11, and the flue gas temperature decreases after heat exchange in the second heat exchanger 11. The gas enters the catalyst layer again, and the gas enters the third heat exchanger 10. The flue gas temperature decreases after heat exchange in the third heat exchanger 10. At this time, part of SO2 is converted into SO3
[0056] 4. The gas enters the first absorption tower of the dry absorption process through the first gas outlet 19 to absorb SO3 with sulfuric acid. The unabsorbed flue gas enters the flue gas inlet 47 of the third heat exchanger from the first absorption tower of the dry absorption process, and undergoes heat exchange in the third heat exchanger 10. The flue gas enters the flue gas inlet 45 of the second heat exchanger from the flue gas outlet 46 of the third heat exchanger, and undergoes heat exchange in the second heat exchanger 11. The flue gas enters the second gas inlet 20 from the flue gas outlet 44 of the second heat exchanger, and continues to enter the catalyst layer for reaction, completing the conversion of SO2 into SO3.
[0057] 5. The flue gas is heat exchanged in the IV heat exchanger 5, and then enters the second absorption tower of the dry absorption section through the second gas outlet 21, where sulfuric acid is used to absorb SO3, thus realizing the process of acid production from waste liquid.
[0058] The utility model adopts a heat pipe heat exchanger, which has a compact structure and occupies less space. The utility model adopts a heat pipe heat exchanger, which is easy to install and disassemble. The utility model adopts porcelain balls as gas distribution and dust removal layers to ensure uniform gas distribution and stable operation of the converter.
[0059] The whole device of the utility model has a compact structure, small footprint, few heat exchangers, short pipes and low overall height. The heat exchange pipes are supported and connected by connecting pipes; it is easy to install and disassemble. The heat exchange effect is good and the heat exchange efficiency is high. The invention realizes the rapid and full conversion of SO2, not only with good conversion effect, but also with high conversion efficiency.
[0060] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes within the technical scope disclosed by the present invention according to the technical scheme and the utility model concept of the present invention, which should be covered by the protection scope of the present invention.
Claims
1. A SO2 conversion tower, characterized in that: It includes a tower body and heat exchangers I to IV arranged on the tower body from top to bottom; The tower body is a vertically arranged cylindrical container, with a first inlet at the top, a second inlet and a first outlet on the tower body between the third heat exchanger and the fourth heat exchanger, and a second outlet on the tower body below the fourth heat exchanger; The outlet of the first heat exchanger is connected to the first inlet, the inlet of the first heat exchanger is connected to the outlet of the fourth heat exchanger, the inlet of the second heat exchanger is connected to the outlet of the third heat exchanger, the outlet of the second heat exchanger is connected to the second inlet, the inlet of the third heat exchanger is connected to the first absorption tower of the dry absorption section, the inlet of the fourth heat exchanger is connected to the SO2-containing flue gas pipeline from the SO2 blower, and the outlet of the fourth heat exchanger is connected to the second absorption tower of the dry absorption section, and the above connection is pipeline connection; Heat exchangers I to IV are all heat pipe type, and catalyst layers are arranged between them, and a catalyst layer is arranged above heat exchanger I.
2. A SO2 conversion tower according to claim 1, characterized in that: A heater is provided on the first inlet.
3. A SO2 conversion tower according to claim 1, characterized in that: The tower body is a circular cylinder, and the shells of the first to fourth heat exchangers are rectangular parallelepipeds with hollow interiors.
4. A SO2 conversion tower according to claim 1, characterized in that: The heat exchangers I to IV have the same structure, including a shell and heat exchange tubes. Multiple heat exchange tubes are arranged in parallel in the shell. The heat exchange tubes are vertically inclined, and the shell is symmetrically provided with inlets and outlets perpendicular to the heat exchange tubes.
5. A SO2 conversion tower according to claim 4, characterized in that: Conical transition sections are provided at the inlet and the outlet.
6. A SO2 conversion tower according to claim 4, characterized in that: It also includes a first connecting tube, a second connecting tube and a third connecting tube for supporting the heat exchange tube. Both ends of the second connecting tube are connected to the heat exchange tube. One end of the first connecting tube is connected to the heat exchange tube and the other end is connected to the wire plug. One end of the third connecting tube is connected to the heat exchange tube and the other end is connected to the wire plug.
7. A SO2 conversion tower according to claim 4, characterized in that: The heat exchange tube consists of an evaporation section, an insulation section and a condensation section. Fins are evenly distributed on the outside of the tube body of the evaporation section and the condensation section, and a heat insulation layer is arranged on the outside of the tube body of the insulation section.
8. The SO2 conversion tower according to claim 1, characterized in that: It also includes a gas distribution and dust removal layer, which is located above the top catalyst layer. The gas distribution and dust removal layer includes a ceramic ball support and ceramic balls. The ceramic ball support is fixed to the tower body, and multiple ceramic balls are placed on the ceramic ball support to form a ceramic ball layer.
9. The SO2 conversion tower according to claim 1, characterized in that: The catalyst layer comprises an upper layer and a lower layer of porcelain balls, and the catalyst is placed between the upper layer and the lower layer of porcelain balls.