CN110615408B - Sulfur trioxide conversion process for white oil production - Google Patents
Sulfur trioxide conversion process for white oil production Download PDFInfo
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- CN110615408B CN110615408B CN201810626862.3A CN201810626862A CN110615408B CN 110615408 B CN110615408 B CN 110615408B CN 201810626862 A CN201810626862 A CN 201810626862A CN 110615408 B CN110615408 B CN 110615408B
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- C01B17/00—Sulfur; Compounds thereof
- C01B17/69—Sulfur trioxide; Sulfuric acid
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Abstract
The invention discloses a sulfur trioxide conversion process for white oil production, which comprises the following process steps: sulfur dioxide and oxygen are simultaneously converted by sulfur trioxide through a conversion device, and the temperature in the conversion device is maintained between 400 and 500 ℃ under the action of a catalyst; introducing the converted sulfur trioxide high-temperature gas into a rotary separator, and separating and removing solid components in the sulfur trioxide gas; and (3) introducing the gaseous sulfur trioxide with the solid components removed into a cooler for cooling, and outputting the gas temperature meeting the requirements of the subsequent process. The sulfur trioxide conversion process for white oil production has high conversion efficiency, is easy to maintain and can be directly applied to subsequent procedures.
Description
Technical Field
The invention relates to chemical production equipment, in particular to a sulfur trioxide conversion process for white oil production.
Background
The sulfur trioxide conversion process is a conversion process for oxidizing sulfur dioxide gas into sulfur trioxide, and the prepared sulfur trioxide is applied to other sulfonation processes. The existing sulfur trioxide conversion process has low reaction efficiency, the conversion rate of sulfur trioxide is only 40% -50%, and the catalyst is fixedly arranged in the device, so that the later maintenance is inconvenient; in addition, solid component impurities exist in the produced sulfur trioxide, and the temperature is too high to be directly utilized. Therefore, it is necessary to design a sulfur trioxide conversion process for white oil production, which has high conversion efficiency, is easy to maintain and can be directly applied to subsequent processes.
Disclosure of Invention
The invention aims to: the sulfur trioxide conversion process for white oil production has high conversion efficiency, is easy to maintain and can be directly applied to subsequent procedures.
The technical scheme is as follows: the invention relates to a sulfur trioxide conversion process for white oil production, which comprises the following steps:
step 1, sulfur dioxide and oxygen are simultaneously converted by sulfur trioxide through a conversion device, and the temperature in the conversion device is maintained between 400 and 500 ℃ under the action of a catalyst;
step 2, introducing the high-temperature sulfur trioxide gas converted in the step 1 into a rotary separator, and separating and removing solid components in the sulfur trioxide gas;
and 3, introducing the gaseous sulfur trioxide with the solid components removed in the step 2 into a cooler for cooling, and outputting the gas temperature meeting the requirements of the subsequent process.
Further, the conversion device used in the step 1 comprises a conversion box, an oxygen inlet pipe, a sulfur dioxide inlet pipe and at least one catalyst partition wall; the conversion box is of a cuboid structure, the left side of the conversion box is provided with a main air inlet pipe, and the right side of the conversion box is provided with a discharge pipe; the oxygen inlet pipe and the sulfur dioxide inlet pipe are simultaneously communicated with the inlet of the main inlet pipe and are sealed at the inlet of the main inlet pipe; the oxygen inlet pipe and the sulfur dioxide inlet pipe are respectively provided with a check valve; a first fan blade for mixed gas is rotatably arranged in the main air inlet pipe through a fixed bracket; the catalyst partition comprises a vertical wallboard and a catalyst partition layer; a window is arranged on the vertical wallboard; the catalyst interlayer is composed of a grid shell and a catalyst layer filled in the grid shell; the catalyst interlayer is obliquely arranged in the window and completely seals the window; the vertical wallboards of the catalyst partition walls are vertically inserted into the conversion box from the top of the conversion box, and sealing baffle strips clamped on the front side and the rear side of the vertical wallboards are vertically arranged on the inner walls of the front side and the rear side of the conversion box; an electric heating pipe is fixedly arranged on the conversion box, and a heating part of the electric heating pipe is positioned at the left side in the conversion box; a thermometer is arranged at the top of the conversion box, and a temperature sensing part of the thermometer extends into the conversion box; the discharging pipe is used for communicating with the rotary separator in the step.
Further, a second fan blade for diffusing gas is rotatably arranged on the left inner wall of the conversion box through a support frame, and the second fan blade is positioned at the outlet of the main air inlet pipe; the top of the conversion box is provided with an inserting port, and the edge of the inserting port is provided with a rectangular enclosing frame; the upper part of the vertical wallboard is provided with a sealing baffle; the vertical wallboard is inserted into the conversion box from the inserting opening, and the sealing baffle is tightly pressed on the upper edge of the rectangular enclosing baffle frame. The sealing of the plug-in mounting opening can be realized through the matching of the sealing baffle and the rectangular enclosing baffle frame. The adoption of the second fan blade can facilitate the rapid diffusion of the mixed gas into the conversion box.
Further, a hanging handle is arranged at the upper part of the vertical wallboard; and a manual valve is arranged on the oxygen inlet pipe and the sulfur dioxide inlet pipe. The hanging handle is adopted to conveniently hang and pull out the catalyst partition wall, so that the later-stage inspection and maintenance are convenient. The manual valve is utilized to conveniently and manually close each air pipe, so that later maintenance is convenient.
Further, the rotary separator used in step 2 comprises a cylindrical housing, an upper cover, a stationary shaft, a rotary cylinder, and at least two layers of conical filter plates; a high-temperature air inlet pipe is arranged at the lower part of the side wall of the cylindrical shell; a lower fixing seat is arranged at the bottom of the cylindrical shell; the upper cover is hinged at the upper opening of the cylindrical shell, and covers the upper opening of the cylindrical shell when the upper cover is covered; an air outlet pipe is arranged on the upper cover; an upper limit sleeve is arranged on the lower side surface of the upper cover; the rotary cylinder is rotatably arranged at the lower part of the fixed shaft, and the central axis of the high-temperature air inlet pipe is tangential to the circumferential surface of the rotary cylinder; the lower end of the fixed shaft is fixedly arranged on the lower fixed seat; each layer of conical filter plates are sequentially and fixedly arranged on the upper part of the fixed shaft from top to bottom, and the large opening of each layer of conical filter plates faces downwards; the conical filter plates are distributed with filter holes, and the upper and lower positions of the filter holes on the adjacent layers of conical filter plates are staggered; the upper end of the fixed shaft is inserted into the upper limit sleeve; triangular baffle strips are arranged on the outer circumferential wall of the rotary cylinder at intervals, and are parallel to the fixed shaft; fixed stop bars are arranged in the cylindrical shell at intervals on the inner wall opposite to the outer circumferential wall of the rotary cylinder, and the fixed stop bars are parallel to the triangular stop bars; an L-shaped lock catch is hinged on the outer side wall of the cylindrical shell, is buckled on the upper cover and is fixedly arranged on the upper cover through a locking bolt; the air outlet pipe is used for being communicated with the cooler in the step.
Further, a sealing ring is arranged at the contact part of the upper cover and the upper opening of the cylindrical shell; a lifting handle for opening the upper cover is arranged on the upper side of the upper cover. The sealing ring is adopted to play a good role in sealing and prevent gas leakage. The lifting handle is adopted to conveniently open the upper cover, so that the later cleaning and maintenance are convenient.
Further, a pressure spring for damping is sleeved on the lower end of the fixed shaft, and the upper end and the lower end of the pressure spring are respectively elastically supported on the lower end face of the rotary cylinder and the upper end face of the lower fixing seat. The compressed spring is utilized to play an effective damping role, so that the rotation tangential velocity of the rotary cylinder is not equal to the flow velocity of the gas, the collision between the gas flow and the triangular stop bar is ensured, and a certain centrifugal force can be provided.
Further, the cooler used in step 3 includes an equipment housing, a lower communication pipe, an upper communication pipe, a horizontal cooling plate, and a vertical cooling plate; the equipment shell is of a cuboid sealed box structure, a cooling air inlet pipe is arranged at the left end of the lower side of the equipment shell, and an air outlet pipe is arranged at the right end of the upper side of the equipment shell; the inside of the horizontal cooling plate and the inside of the vertical cooling plate are respectively provided with a water storage cavity; each horizontal cooling plate is arranged at the lower part in the equipment shell at intervals from bottom to top through a horizontal supporting bar, the left side edge of the horizontal cooling plate at the lowest layer is fixedly arranged, and the right side edge of the horizontal cooling plate at the uppermost layer is fixedly arranged; in the two upper and lower adjacent horizontal cooling plates, the left side edge, the front side edge and the rear side edge of one horizontal cooling plate are respectively and fixedly arranged on the left inner wall, the front inner wall and the rear inner wall of the equipment shell, and the right side edge, the front side edge and the rear side edge of the other horizontal cooling plate are respectively and fixedly arranged on the right inner wall, the front inner wall and the rear inner wall of the equipment shell, so that an airflow forms a tortuous path from bottom to top; each vertical cooling plate is arranged at the upper part in the equipment shell at intervals from left to right, the lower side edge of the leftmost vertical cooling plate is fixedly arranged, and the upper side edge of the rightmost vertical cooling plate is fixedly arranged; the upper side edge, the front side edge and the rear side edge of one vertical cooling plate are respectively and fixedly arranged on the upper inner wall, the front inner wall and the rear inner wall of the equipment shell, and the lower side edge, the front side edge and the rear side edge of the other vertical cooling plate are respectively and fixedly arranged on the upper side surface of the uppermost horizontal cooling plate, the front inner wall and the rear inner wall of the equipment shell, so that airflow forms a tortuous path from left to right; a water inlet pipe communicated with the internal water storage cavity is arranged on the left side edge of the horizontal cooling plate fixedly arranged on the left side edge and the right side edge of the horizontal cooling plate fixedly arranged on the right side edge; the front side and the rear side of each vertical cooling plate are respectively provided with a communicating water pipe communicated with the internal water storage cavity; the water inlet pipes positioned on the left side and the right side of the equipment shell are communicated through the lower communicating pipe, and a lower water inlet main pipe is arranged on the lower communicating pipe communicated with the water inlet pipe; the water outlet pipes positioned on the left side and the right side of the equipment shell are communicated through a lower communicating pipe, and a lower water outlet main pipe is arranged on the lower communicating pipe communicated with the water outlet pipe; the communicating water pipe on the front side of the equipment shell is communicated through an upper communicating pipe, and an upper water inlet main pipe is arranged on the upper communicating pipe communicated with the communicating water pipe on the front side; the communicating water pipe on the back side of the equipment shell is communicated through an upper communicating pipe, and an upper water outlet main pipe is arranged on the upper communicating pipe communicated with the communicating water pipe on the back side; the air inlet pipe is used for communicating with the rotary separator in the step.
Further, the distance between the opposite plate surfaces of two upper and lower adjacent horizontal cooling plates is 2-4 cm.
Further, the distance between the opposite plate surfaces of two adjacent left and right vertical cooling plates is 2-4 cm.
Compared with the prior art, the invention has the beneficial effects that: oxygen and sulfur dioxide respectively enter the air inlet pipe from the oxygen air inlet pipe and the sulfur dioxide air inlet pipe, and simultaneously blow the first fan blade to rotate, so that two gases are quickly mixed, enter the conversion box and blow the second fan blade to rotate, and the two mixed gases are quickly diffused into the conversion box by the second fan blade; the electric heating pipe is used for heating gas in the conversion box and the thermometer is used for monitoring the temperature, so that the temperature is maintained between 400 and 500 ℃ and the good conversion efficiency is ensured; the heated mixed gas passes through the catalyst partition layers at each window, and the catalyst is used for catalytic reaction to generate sulfur trioxide, so that the sulfur trioxide obtained by the reaction is in a gaseous state due to higher temperature, and the catalytic reaction is carried out through the two layers of catalyst partition walls, so that the conversion efficiency of the catalytic reaction can be ensured; when the vertical wallboard is inserted into the conversion box from the inserting port, the sealing baffle is tightly pressed on the upper edge of the rectangular enclosing and blocking frame to realize the sealing of the inserting port; the method comprises the steps that solid matters in the entering gas are blocked and collided by utilizing a triangular baffle strip on the outer circumferential wall of the rotary cylinder and a fixed baffle strip on the inner wall of the cylindrical shell, so that the solid matters do not flow along with the gas flow any more, and a certain centrifugal force is formed under the rotation action of the rotary cylinder, so that the solid matters are thrown away from the gas; in the gas rising process, solid matters are effectively filtered due to the blocking effect of each layer of conical filter plates, and the filter holes staggered with each other can play a good role in filtering the solid matters; the hinged installation of the upper cover is utilized, so that solid matters in the cylindrical shell can be conveniently cleaned regularly, and the later maintenance is facilitated; the sealing performance of the upper cover after the upper cover is covered can be ensured by utilizing the L-shaped lock catch and the sealing ring, so that gas leakage in the using process is prevented; the horizontal cooling plates are arranged at the lower part in the equipment shell at intervals from bottom to top through the horizontal supporting bars, and the horizontal cooling plates are staggered left and right, so that a tortuous path is formed by air flow from bottom to top, and the air can have a better cooling effect when the air just enters the cooler; the vertical cooling plates are arranged at the upper part in the equipment shell at intervals from left to right, and are staggered up and down, so that the airflow forms a tortuous path from left to right, and the gas can be ensured to realize a better uniform cooling effect after being cooled in the earlier stage; the lower communicating pipe can be used for realizing the uniform inlet and outlet of cooling water for each horizontal cooling plate at the lower part, and the upper communicating pipe can be used for realizing the uniform inlet and outlet of cooling water for each vertical cooling plate at the upper part, so that the internal gas is uniformly cooled; the left side edge of the horizontal cooling plate at the lowest layer is fixedly arranged, so that air flow moves rightwards after entering the cooler and cannot directly rise, and sufficient cooling is ensured; the upper side of the right-most vertical cooling plate is fixedly arranged, so that an air outlet vertical channel is formed below the air outlet pipe, and smooth and uniform output of air flow is ensured.
Drawings
FIG. 1 is a schematic diagram of a connection structure between a conversion device and a rotary separator according to the present invention;
FIG. 2 is a schematic view of the left side structure of a catalyst partition in the conversion apparatus according to the present invention;
FIG. 3 is a schematic diagram of the connection between the rotating separator and the cooler according to the present invention;
fig. 4 is a schematic left-hand structural view of the cooler of the present invention.
Detailed Description
The technical scheme of the present invention will be described in detail with reference to the accompanying drawings, but the scope of the present invention is not limited to the embodiments.
Example 1:
the invention discloses a sulfur trioxide conversion process for white oil production, which comprises the following steps:
step 1, sulfur dioxide and oxygen are simultaneously converted by sulfur trioxide through a conversion device, and the temperature in the conversion device is maintained between 400 and 500 ℃ under the action of a catalyst;
step 2, introducing the high-temperature sulfur trioxide gas converted in the step 1 into a rotary separator, and separating and removing solid components in the sulfur trioxide gas;
and 3, introducing the gaseous sulfur trioxide with the solid components removed in the step 2 into a cooler for cooling, and outputting the gas temperature meeting the requirements of the subsequent process.
As shown in fig. 1 and 2, the conversion device used in step 1 comprises a conversion box 101, an oxygen inlet pipe 104, a sulfur dioxide inlet pipe 105 and at least one catalyst partition; the conversion box 101 is of a cuboid structure, a main air inlet pipe 102 is arranged on the left side of the conversion box 101, and a discharge pipe 103 is arranged on the right side of the conversion box 101; the oxygen inlet pipe 104 and the sulfur dioxide inlet pipe 105 are simultaneously communicated with the inlet of the main inlet pipe 102 and are sealed at the inlet of the main inlet pipe 102; a check valve 117 is arranged on each of the oxygen inlet pipe 104 and the sulfur dioxide inlet pipe 105; a first fan blade 119 for mixed gas is rotatably arranged in the main air inlet pipe 102 through a fixed bracket 118; the catalyst partition includes vertical wall panels 108 and catalyst spacers 114; a window 115 is formed on the vertical wallboard 108; the catalyst barrier 114 is composed of a grill housing and a catalyst layer filled in the grill housing; the catalyst barrier 114 is obliquely installed in the window 115 and completely closes the window 115; the vertical wallboards 108 of the catalyst partition walls are vertically inserted into the conversion box 101 from the top of the conversion box 101, and sealing stop strips 113 clamped on the front side and the rear side of the vertical wallboards 108 are vertically arranged on the inner walls of the front side and the rear side of the conversion box 101; an electric heating pipe 106 is fixedly arranged on the conversion box 101, and a heating part of the electric heating pipe 106 is positioned at the left side in the conversion box 101; a thermometer 107 is provided on the top of the conversion box 101, and a temperature sensing part of the thermometer 107 extends into the conversion box 101; the discharge pipe 103 is used to communicate with the rotating separator in step 2.
Further, a second fan blade 121 for diffusing gas is rotatably installed on the left inner wall of the conversion box 101 through a supporting frame 120, and the second fan blade 121 is positioned at the outlet of the main air inlet pipe 102; a plug-in port is arranged at the top of the conversion box 101, and a rectangular enclosure frame 109 is arranged at the edge of the plug-in port; a sealing baffle 110 is arranged at the upper part of the vertical wallboard 108; the vertical wall plate 108 is inserted into the transfer box 101 from the insertion opening, and the sealing baffle 110 is pressed against the upper edge of the rectangular enclosure frame 109. A hanging handle 112 is arranged at the upper part of the vertical wallboard 108; a manual valve 116 is arranged on the oxygen inlet pipe 104 and the sulfur dioxide inlet pipe 105.
As shown in fig. 1 and 3, the rotary separator used in step 2 comprises a cylindrical housing 201, an upper cover 209, a stationary shaft 204, a rotary cylinder 205, and at least two layers of conical filter plates 216; a high temperature air inlet pipe 202 is provided at the lower part of the side wall of the cylindrical housing 201; a lower holder 207 is provided at the bottom of the cylindrical housing 201; the upper cover 209 is hinged at the upper opening of the cylindrical housing 201, and the upper cover 209 covers the upper opening of the cylindrical housing 201 when closed; an air outlet pipe 211 is arranged on the upper cover 209; an upper limit sleeve 210 is arranged on the lower side surface of the upper cover 209; the rotary cylinder 205 is rotatably installed at the lower part of the fixed shaft 204, and the central axis of the high-temperature air inlet pipe 202 is tangent to the circumferential surface of the rotary cylinder 205; the lower end of the fixed shaft 204 is fixedly mounted on the lower fixing base 207; each layer of conical filter plates 216 are sequentially and fixedly arranged on the upper part of the fixed shaft 204 from top to bottom, and the large opening of each layer of conical filter plates 216 faces downwards; the cone-shaped filter plates 216 are provided with filter holes 217 in a distributed manner, and the upper and lower positions of the filter holes 217 on the cone-shaped filter plates 216 on adjacent layers are staggered; the upper end of the fixed shaft 204 is inserted into the upper limit sleeve 210; triangular ribs 206 are arranged on the outer circumferential wall of the rotary cylinder 205 at intervals, and the triangular ribs 206 are parallel to the fixed shaft 204; fixed ribs 203 are provided at intervals on the inner wall of the cylindrical housing 201 opposite to the outer circumferential wall of the rotary cylinder 205, and the fixed ribs 203 are parallel to the triangular ribs 206; an L-shaped lock catch 213 is hinged on the outer side wall of the cylindrical shell 201, and the L-shaped lock catch 213 is buckled on the upper cover 209 and fixedly arranged on the upper cover 209 through a locking bolt 214; the air outlet pipe 211 is used for communicating with the cooler in the step 3.
Further, a seal ring 215 is provided at the contact point of the upper cover 209 and the upper opening of the cylindrical housing 201; a lifting handle 212 for opening the upper cover 209 is provided at an upper side of the upper cover 209. A compression spring 208 for damping is sleeved on the lower end of the fixed shaft 204, and the upper end and the lower end of the compression spring 208 are respectively elastically supported on the lower end surface of the rotary cylinder 205 and the upper end surface of the lower fixing seat 207.
As shown in fig. 3 and 4, the cooler used in step 3 includes an equipment casing 301, a lower communication pipe 306, an upper communication pipe 311, a horizontal cooling plate 304, and a vertical cooling plate 313; the equipment shell 301 is of a cuboid sealed box structure, a cooling air inlet pipe 302 is arranged at the left end of the lower side of the equipment shell 301, and an air outlet pipe 303 is arranged at the right end of the upper side of the equipment shell 301; water storage cavities are arranged in the horizontal cooling plate 304 and the vertical cooling plate 313; each horizontal cooling plate 304 is installed at a lower part in the equipment shell 301 at intervals from bottom to top through a horizontal supporting bar 305, the left side edge of the horizontal cooling plate 304 at the lowest layer is fixedly installed, and the right side edge of the horizontal cooling plate 304 at the uppermost layer is fixedly installed; in the two upper and lower adjacent horizontal cooling plates 304, the left side edge, the front side edge and the rear side edge of one horizontal cooling plate 304 are respectively and fixedly installed on the left inner wall, the front inner wall and the rear inner wall of the equipment shell 301, and the right side edge, the front side edge and the rear side edge of the other horizontal cooling plate 304 are respectively and fixedly installed on the right inner wall, the front inner wall and the rear inner wall of the equipment shell 301, so that a tortuous path is formed by air flow from bottom to top; each vertical cooling plate 313 is installed at an upper portion in the apparatus housing 301 at a left-to-right interval, and a lower side of the leftmost vertical cooling plate 313 is fixedly installed, and an upper side of the rightmost vertical cooling plate 313 is fixedly installed; of the two vertically adjacent cooling plates 313, an upper side, a front side and a rear side of one of the cooling plates 313 are fixedly installed on the upper inner wall, the front inner wall and the rear inner wall of the equipment housing 301, respectively, and a lower side, a front side and a rear side of the other cooling plate 313 are fixedly installed on the upper side of the uppermost horizontal cooling plate 304, the front inner wall and the rear inner wall of the equipment housing 301, respectively, so that a tortuous path is formed by the air flow from left to right; a water inlet pipe 308 communicated with the internal water storage cavity is arranged on the left side edge of the horizontal cooling plate 304 fixedly arranged on the left side edge and the right side edge of the horizontal cooling plate 304 fixedly arranged on the right side edge, and a water outlet pipe 310 communicated with the internal water storage cavity is arranged on the right side edge of the horizontal cooling plate 304 fixedly arranged on the left side edge and the left side edge of the horizontal cooling plate 304 fixedly arranged on the right side edge; communication water pipes 314 communicated with the internal water storage cavities are arranged on the front side and the rear side of each vertical cooling plate 313; the water inlet pipes 308 on the left side and the right side of the equipment housing 301 are communicated through the lower communicating pipe 306, and a lower water inlet main 307 is arranged on the lower communicating pipe 306 communicated with the water inlet pipe 308; the water outlet pipes 310 on the left and right sides of the equipment housing 301 are connected through the lower connection pipe 306, and a lower water outlet header 309 is provided on the lower connection pipe 306 connected to the water outlet pipe 310; the communicating water pipe 314 on the front side of the equipment housing 301 is communicated through the upper communicating pipe 311, and an upper water inlet header 315 is provided on the upper communicating pipe 311 communicated with the communicating water pipe 314 on the front side; the communicating pipe 314 on the rear side of the equipment housing 301 is communicated through the upper communicating pipe 311, and an upper water outlet header 312 is provided on the upper communicating pipe 311 communicated with the communicating pipe 314 on the rear side; the air inlet pipe 302 is used to communicate with the rotating separator in step 2.
Further, the distance between the two adjacent upper and lower horizontal cooling plates 304 is 2-4 cm, preferably 3cm, and the air flow can be ensured to be smooth by adopting the 3cm interval, and a better cooling effect can be realized. The distance between the opposite plate surfaces of two adjacent vertical cooling plates 313 is 2-4 cm, preferably 3cm, and the air flow can be ensured to be smooth by adopting the 3cm spacing, and a better cooling effect can be realized.
When the sulfur trioxide conversion process for white oil production disclosed by the invention is used, the conversion efficiency of sulfur trioxide is high, the maintenance is easy, and the converted sulfur trioxide can be directly applied to subsequent procedures. Among these, the conversion device, the rotating separator and the cooler used have the outstanding effect that: oxygen and sulfur dioxide respectively enter the air inlet pipe 102 from the oxygen air inlet pipe 104 and the sulfur dioxide air inlet pipe 105, and simultaneously blow the first fan blade 119 to rotate, so that two gases are quickly mixed, enter the conversion box 101 and blow the second fan blade 121 to rotate, and the two mixed gases are quickly diffused into the conversion box 101 by the second fan blade 121; the electric heating pipe 106 heats the gas in the conversion box 101 and the thermometer 107 monitors the temperature, so that the temperature is maintained between 400 and 500 ℃ and the good conversion efficiency is ensured; the heated mixed gas passes through the catalyst partition 114 from each window 115, and is catalyzed by the catalyst to generate sulfur trioxide, and the sulfur trioxide obtained by the reaction is in a gaseous state due to higher temperature, and the conversion efficiency of the catalytic reaction can be ensured through the catalytic reaction of the two layers of catalyst partition walls; during the later maintenance, the manual valve 116 can be closed, and then each catalyst partition wall is lifted up for maintenance through the suspension handle 112, or the catalyst partition layer 114 is replaced, when the vertical wallboard 108 is inserted into the conversion box 101 from the insertion opening, the sealing baffle 110 is tightly pressed on the upper edge of the rectangular enclosing baffle frame 109 to realize the sealing of the insertion opening; the check valve 117 can be used for controlling the inflow of the two gases respectively, so that no gas backflow occurs; the solid matters in the entering gas are blocked and collided by utilizing the triangular baffle strips 206 on the outer circumferential wall of the rotary cylinder 205 and the fixed baffle strips 203 on the inner wall of the cylindrical shell 201, so that the solid matters no longer flow along with the gas flow, and a certain centrifugal force is formed under the rotation action of the rotary cylinder 205, so that the solid matters are thrown away from the gas; in the gas rising process, solid matters are effectively filtered due to the blocking effect of each layer of conical filter plates 216, and the filter holes 217 which are staggered mutually can play a good role in filtering the solid matters; the hinged installation of the upper cover 209 can facilitate the regular cleaning of solid matters in the cylindrical shell 201 and the later maintenance; the L-shaped lock catch 213 and the sealing ring 215 can ensure the sealing performance of the upper cover 209 after being covered, and prevent the gas leakage in the using process; each horizontal cooling plate 304 is arranged at the lower part in the equipment shell 301 at intervals from bottom to top through a horizontal supporting bar 305, and each horizontal cooling plate 304 is staggered left and right, so that a tortuous path is formed by air flow from bottom to top, and a better cooling effect can be ensured when the air just enters the cooler; each vertical cooling plate 313 is arranged at the upper part in the equipment shell 301 at intervals from left to right, and each vertical cooling plate 313 is staggered up and down, so that a tortuous path is formed by air flow from left to right, and a good uniform cooling effect of air after early cooling can be ensured; the lower communicating pipe 306 can realize the uniform inlet and outlet of cooling water of each lower horizontal cooling plate 304, and the upper communicating pipe 311 can realize the uniform inlet and outlet of cooling water of each upper vertical cooling plate 313, so that the internal gas is cooled uniformly; the left side edge of the horizontal cooling plate 304 at the lowest layer is fixedly arranged, so that air flow moves rightwards after entering the cooler and cannot directly rise, and sufficient cooling is ensured; the upper side of the rightmost vertical cooling plate 313 is fixedly arranged, so that an air outlet vertical channel is formed below the air outlet pipe 303, and smooth and uniform output of air flow is ensured.
As described above, although the present invention has been shown and described with reference to certain preferred embodiments, it is not to be construed as limiting the invention itself. Various changes in form and details may be made therein without departing from the spirit and scope of the invention as defined by the appended claims.
Claims (8)
1. The sulfur trioxide conversion process for white oil production is characterized by comprising the following steps of:
step 1, sulfur dioxide and oxygen are simultaneously converted by sulfur trioxide through a conversion device, and the temperature in the conversion device is maintained at 400-500 ℃ under the action of a catalyst;
step 2, introducing the high-temperature sulfur trioxide gas converted in the step 1 into a rotary separator, and separating and removing solid components in the sulfur trioxide gas;
step 3, introducing the gaseous sulfur trioxide with the solid components removed in the step 2 into a cooler for cooling, and outputting the gas temperature meeting the requirements of the subsequent process;
the conversion device used in the step 1 comprises a conversion box (101), an oxygen inlet pipe (104), a sulfur dioxide inlet pipe (105) and at least one catalyst partition wall; the conversion box (101) is of a cuboid structure, a main air inlet pipe (102) is arranged on the left side of the conversion box (101), and a discharge pipe (103) is arranged on the right side of the conversion box (101); the oxygen inlet pipe (104) and the sulfur dioxide inlet pipe (105) are simultaneously communicated with the inlet of the main inlet pipe (102) and are sealed at the inlet of the main inlet pipe (102); the oxygen inlet pipe (104) and the sulfur dioxide inlet pipe (105) are respectively provided with a check valve (117); a first fan blade (119) for mixed gas is rotatably arranged in the main air inlet pipe (102) through a fixed bracket (118); the catalyst partition comprises a vertical wallboard (108) and a catalyst partition layer (114); a window (115) is arranged on the vertical wallboard (108); the catalyst interlayer (114) is composed of a grid shell and a catalyst layer filled in the grid shell; the catalyst interlayer (114) is obliquely arranged in the window (115) and completely seals the window (115); the vertical wallboards (108) of the catalyst partition walls are vertically inserted into the conversion box (101) from the top of the conversion box (101), and sealing stop strips (113) clamped on the front side and the rear side of the vertical wallboards (108) are vertically arranged on the inner walls of the front side and the rear side of the conversion box (101); an electric heating pipe (106) is fixedly arranged on the conversion box (101), and a heating part of the electric heating pipe (106) is positioned at the left side in the conversion box (101); a thermometer (107) is arranged at the top of the conversion box (101), and a temperature sensing part of the thermometer (107) stretches into the conversion box (101); the discharging pipe (103) is used for communicating with the rotary separator in the step 2;
the rotary separator used in step 2 comprises a cylindrical housing (201), an upper cover (209), a stationary shaft (204), a rotary cylinder (205) and at least two layers of conical filter plates (216); a high-temperature air inlet pipe (202) is arranged at the lower part of the side wall of the cylindrical shell (201); a lower fixing seat (207) is arranged at the bottom of the cylindrical shell (201); the upper cover (209) is hinged at the upper opening of the cylindrical shell (201), and the upper opening of the cylindrical shell (201) is covered when the upper cover (209) is covered; an air outlet pipe (211) is arranged on the upper cover (209); an upper limit sleeve (210) is arranged on the lower side surface of the upper cover (209); the rotary cylinder (205) is rotatably arranged at the lower part of the fixed shaft (204), and the central axis of the high-temperature air inlet pipe (202) is tangential with the circumferential surface of the rotary cylinder (205); the lower end of the fixed shaft (204) is fixedly arranged on the lower fixing seat (207); each layer of conical filter plates (216) is fixedly arranged on the upper part of the fixed shaft (204) from top to bottom in sequence, and the large opening of each layer of conical filter plates (216) faces downwards; the cone-shaped filter plates (216) are provided with filter holes (217) in a distributed manner, and the upper and lower positions of the filter holes (217) on the cone-shaped filter plates (216) of adjacent layers are staggered; the upper end of the fixed shaft (204) is inserted into the upper limit sleeve (210); triangular baffle strips (206) are arranged on the outer circumferential wall of the rotary cylinder (205) at intervals, and the triangular baffle strips (206) are parallel to the fixed shaft (204); fixed stop strips (203) are arranged in the cylindrical shell (201) at intervals on the inner wall opposite to the outer circumferential wall of the rotary cylinder (205), and the fixed stop strips (203) are parallel to the triangular stop strips (206); an L-shaped lock catch (213) is hinged on the outer side wall of the cylindrical shell (201), and the L-shaped lock catch (213) is buckled on the upper cover (209) and fixedly arranged on the upper cover (209) through a locking bolt (214); the air outlet pipe (211) is used for being communicated with the cooler in the step 3.
2. The sulfur trioxide conversion process for white oil production according to claim 1, characterized in that a second fan blade (121) for diffusing gas is rotatably installed on the left inner wall of the conversion box (101) through a supporting frame (120), and the second fan blade (121) is located at the outlet of the main intake pipe (102); the top of the conversion box (101) is provided with an inserting port, and the edge of the inserting port is provided with a rectangular enclosing frame (109); a sealing baffle plate (110) is arranged at the upper part of the vertical wallboard (108); the vertical wallboard (108) is inserted into the conversion box (101) from the inserting opening, and the sealing baffle (110) is tightly pressed on the upper edge of the rectangular enclosing baffle frame (109).
3. The sulfur trioxide conversion process for white oil production according to claim 1, characterized in that a hanging handle (112) is provided at the upper portion of the vertical wall panel (108); a manual valve (116) is arranged on each of the oxygen inlet pipe (104) and the sulfur dioxide inlet pipe (105).
4. The sulfur trioxide conversion process for white oil production according to claim 1, characterized in that: a sealing ring (215) is arranged at the contact position of the upper cover (209) and the upper opening of the cylindrical shell (201); a lifting handle (212) for opening the upper cover (209) is arranged on the upper side of the upper cover (209).
5. The sulfur trioxide conversion process for white oil production according to claim 1, characterized in that: the lower end of the fixed shaft (204) is sleeved with a pressure spring (208) for damping, and the upper end and the lower end of the pressure spring (208) are respectively elastically supported on the lower end face of the rotary cylinder (205) and the upper end face of the lower fixing seat (207).
6. The sulfur trioxide conversion process for white oil production according to claim 1, characterized in that the cooler used in step 3 comprises an equipment housing (301), a lower communication pipe (306), an upper communication pipe (311), a horizontal cooling plate (304) and a vertical cooling plate (313); the equipment shell (301) is of a cuboid sealed box structure, a cooling air inlet pipe (302) is arranged at the left end of the lower side of the equipment shell (301), and an air outlet pipe (303) is arranged at the right end of the upper side of the equipment shell (301); the insides of the horizontal cooling plate (304) and the vertical cooling plate (313) are respectively provided with a water storage cavity; each horizontal cooling plate (304) is arranged at the lower part in the equipment shell (301) at intervals from bottom to top through a horizontal supporting bar (305), the left side edge of the horizontal cooling plate (304) at the lowest layer is fixedly arranged, and the right side edge of the horizontal cooling plate (304) at the uppermost layer is fixedly arranged; in the two upper and lower adjacent horizontal cooling plates (304), the left side edge, the front side edge and the rear side edge of one horizontal cooling plate (304) are respectively and fixedly arranged on the left inner wall, the front inner wall and the rear inner wall of the equipment shell (301), and the right side edge, the front side edge and the rear side edge of the other horizontal cooling plate (304) are respectively and fixedly arranged on the right inner wall, the front inner wall and the rear inner wall of the equipment shell (301), so that a tortuous path is formed by air flow from bottom to top; each vertical cooling plate (313) is arranged at the upper part in the equipment shell (301) at intervals from left to right, the lower side edge of the leftmost vertical cooling plate (313) is fixedly arranged, and the upper side edge of the rightmost vertical cooling plate (313) is fixedly arranged; the upper side edge, the front side edge and the rear side edge of one vertical cooling plate (313) are respectively and fixedly arranged on the upper inner wall, the front inner wall and the rear inner wall of the equipment shell (301), and the lower side edge, the front side edge and the rear side edge of the other vertical cooling plate (313) are respectively and fixedly arranged on the upper side surface of the uppermost horizontal cooling plate (304) and the front inner wall and the rear inner wall of the equipment shell (301), so that an airflow forms a tortuous path from left to right; a water inlet pipe (308) communicated with the internal water storage cavity is arranged on the left side edge of the horizontal cooling plate (304) fixedly arranged on the left side edge and the right side edge of the horizontal cooling plate (304) fixedly arranged on the right side edge, and a water outlet pipe (310) communicated with the internal water storage cavity is arranged on the right side edge of the horizontal cooling plate (304) fixedly arranged on the left side edge and the left side edge of the horizontal cooling plate (304) fixedly arranged on the right side edge; communication water pipes (314) communicated with the internal water storage cavities are arranged on the front side edge and the rear side edge of each vertical cooling plate (313); the water inlet pipes (308) positioned on the left side and the right side of the equipment shell (301) are communicated with each other through a lower communicating pipe (306), and a lower water inlet main pipe (307) is arranged on the lower communicating pipe (306) communicated with the water inlet pipe (308); the water outlet pipes (310) positioned on the left side and the right side of the equipment shell (301) are communicated with each other through a lower communicating pipe (306), and a lower water outlet main pipe (309) is arranged on the lower communicating pipe (306) communicated with the water outlet pipe (310); the communicating water pipe (314) positioned on the front side of the equipment shell (301) is communicated with the upper communicating pipe (311), and an upper water inlet main pipe (315) is arranged on the upper communicating pipe (311) communicated with the communicating water pipe (314) on the front side; the communicating water pipe (314) positioned on the rear side of the equipment shell (301) is communicated with the upper communicating pipe (311), and an upper water outlet main pipe (312) is arranged on the upper communicating pipe (311) communicated with the communicating water pipe (314) on the rear side; the air inlet pipe (302) is used for communicating with the rotary separator in the step 2.
7. The sulfur trioxide conversion process for white oil production according to claim 6, characterized in that: the distance between the opposite plate surfaces of two upper and lower adjacent horizontal cooling plates (304) is 2-4 cm.
8. The sulfur trioxide conversion process for white oil production according to claim 6, characterized in that: the distance between the opposite plate surfaces of two adjacent left and right vertical cooling plates (313) is 2-4 cm.
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE2617893A1 (en) * | 1975-04-24 | 1976-11-04 | Stauffer Chemical Co | PROCESS FOR MANUFACTURING LIQUID SULFUR TRIOXIDE |
| CN2423270Y (en) * | 2000-04-20 | 2001-03-14 | 长沙有色冶金设计研究院 | Built-in type converter |
| CN101573291A (en) * | 2006-10-31 | 2009-11-04 | 拜尔技术服务有限责任公司 | Process and apparatus for the catalytic oxidation of so2-containing gases by means of oxygen |
| CN205472658U (en) * | 2015-12-31 | 2016-08-17 | 盐城市恒星石油化学有限公司 | High -efficient sulfur trioxide transition system |
| CN206384839U (en) * | 2016-11-30 | 2017-08-08 | 天津天智精细化工有限公司 | A kind of sulfur trioxide conversion equipment |
| CN206381789U (en) * | 2016-11-30 | 2017-08-08 | 天津天智精细化工有限公司 | A kind of sulfur trioxide cooling filtering device |
| CN207102556U (en) * | 2017-07-05 | 2018-03-16 | 中国石化工程建设有限公司 | Horizontal reactor |
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2018
- 2018-06-19 CN CN201810626862.3A patent/CN110615408B/en active Active
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE2617893A1 (en) * | 1975-04-24 | 1976-11-04 | Stauffer Chemical Co | PROCESS FOR MANUFACTURING LIQUID SULFUR TRIOXIDE |
| CN2423270Y (en) * | 2000-04-20 | 2001-03-14 | 长沙有色冶金设计研究院 | Built-in type converter |
| CN101573291A (en) * | 2006-10-31 | 2009-11-04 | 拜尔技术服务有限责任公司 | Process and apparatus for the catalytic oxidation of so2-containing gases by means of oxygen |
| CN205472658U (en) * | 2015-12-31 | 2016-08-17 | 盐城市恒星石油化学有限公司 | High -efficient sulfur trioxide transition system |
| CN206384839U (en) * | 2016-11-30 | 2017-08-08 | 天津天智精细化工有限公司 | A kind of sulfur trioxide conversion equipment |
| CN206381789U (en) * | 2016-11-30 | 2017-08-08 | 天津天智精细化工有限公司 | A kind of sulfur trioxide cooling filtering device |
| CN207102556U (en) * | 2017-07-05 | 2018-03-16 | 中国石化工程建设有限公司 | Horizontal reactor |
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