CN209741032U - Solid sodium methoxide alkaline process production device - Google Patents
Solid sodium methoxide alkaline process production device Download PDFInfo
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- CN209741032U CN209741032U CN201920407829.1U CN201920407829U CN209741032U CN 209741032 U CN209741032 U CN 209741032U CN 201920407829 U CN201920407829 U CN 201920407829U CN 209741032 U CN209741032 U CN 209741032U
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Abstract
A solid sodium methoxide alkaline process apparatus for producing, including sodium methoxide synthetic unit, rake dryer, heat medium unit, rake dryer includes the cylinder, spindle, rake tooth, left rotary joint, right rotary joint, the rake dryer of the utility model, the heat medium enters the left heat medium cavity of the spindle through the left rotary joint, and then enters the heat medium inlet connecting cavity of the first connecting cavity, and then enters the U-shaped cavity of the corresponding rake tooth, and then flows back to the heat medium outlet connecting cavity of the first connecting cavity, and then enters the heat medium inlet connecting cavity of the second connecting cavity from the heat medium outlet connecting cavity of the first connecting cavity, so as to circulate, finally enters the right heat medium cavity, and then flows to the condensation main pipe through the right rotary joint, the heat medium in the spindle and rake tooth can flow smoothly, the heat transfer is abundant, the heating spindle and rake tooth are guaranteed to be fully heated, the multistage cooling unit can adjust the number of coolers through which the overhead steam flows according to different extraction quantities, and the insufficient cooling or excessive cooling of a single cooler is avoided.
Description
Technical Field
The utility model relates to a sodium methoxide synthesis equipment technical field, in particular to solid-state sodium methoxide alkaline process apparatus for producing.
Background
The industrial alkaline process is mostly adopted to produce sodium methoxide, methanol steam required for dehydration is added from the bottom of a synthesis tower, mixed steam of methanol and water is discharged from the top of the synthesis tower to a rectifying tower for rectification and separation, the obtained anhydrous methanol enters the synthesis tower for recycling, in the process, the stable control of the operation conditions of the synthesis tower and the rectifying tower is the key point of the control of the production process of the sodium methoxide, the cooling of the steam at the top of the conventional rectifying tower adopts a single cooler, the regulation and control range is very limited, the requirement of the accurate regulation and control of the operation conditions of the synthesis tower and the rectifying tower is difficult to meet, the subsequent drying treatment of the liquid sodium methoxide through a rake dryer is required, the utility model with the application number of 201020180682.6 discloses a rake dryer with an internal heating shaft and rake teeth, the technical scheme of the utility model adopts a hollow rotating shaft and hollow rake teeth to avoid the adhesion of materials with higher heat sensitivity on the rotating shaft and the rake teeth, the disadvantages that the heating medium in the hollow part of the rake teeth is difficult to flow back to the rotating shaft from the rake teeth, the heating medium has poor circulation, and the purpose of heating the rotating shaft and the rake teeth is difficult to achieve.
Disclosure of Invention
In view of the above, it is necessary to provide a solid sodium methoxide alkaline process production apparatus with high regulation and high heating efficiency.
The utility model provides a solid-state sodium methoxide alkaline process apparatus for producing, includes sodium methoxide synthesis unit, rake dryer, heat medium unit, sodium methoxide synthesis unit includes first preheater, synthetic tower, rectifying column, multistage cooling unit, second preheater, synthetic tower left side upper portion has a raw materials entry, and alcohol lye gets into the shell side of first preheater, adds the synthetic tower through raw materials entry after first preheater heats, the synthetic tower top has a gas phase export, the lower part has a gas phase entry in the rectifying column left side, and the gas phase export of synthetic tower and the gas phase entry of rectifying column are with the pipe connection to make the gaseous mixture of methyl alcohol and water in the synthetic tower send into the rectifying column, rectifying column top has a gas phase export, and the gas phase export of rectifying column and the pipe of first preheater are connected, install first pneumatic valve on the pipeline between the gas phase export of rectifying column and the first preheater, the tube pass inlet and outlet of the first preheater is connected with the cooling total inlet on the right side of the multistage cooling unit, the gas phase outlet of the rectifying tower is connected with the cooling total inlet on the left side of the multistage cooling unit, the second pneumatic valve is arranged on a pipeline between the cooling total inlet on the left side of the multistage cooling unit and the gas phase outlet of the rectifying tower, the second pneumatic valve is positioned between the first pneumatic valve and the multistage cooling unit, the multistage cooling unit is provided with a methanol inlet to supplement anhydrous methanol for the multistage cooling unit, the multistage cooling unit is provided with a total cooling outlet, the total cooling outlet of the multistage cooling unit is connected with the second preheater through a pipeline, the third pneumatic valve is arranged on the pipeline between the multistage cooling unit and the second preheater, the upper part on the right side of the rectifying tower is provided with a first liquid phase inlet, and the total cooling outlet of the multistage cooling unit is connected with the first liquid phase inlet of the rectifying tower through a pipeline, a fourth pneumatic valve is arranged on a pipeline between the multistage cooling unit and the rectifying tower, the fourth pneumatic valve is positioned between the third pneumatic valve and the rectifying tower, the lower part of the left side of the synthesizing tower is provided with a methanol return port, the outlet of the second preheater is connected with the methanol return port of the synthesizing tower through a pipeline, the multistage cooling unit comprises a first cooler, a second cooler, a third cooler and a temporary storage box, the left inlet of the first cooler is used as the left cooling total inlet of the multistage cooling unit, the right inlet of the first cooler and the left inlet of the second cooler are used as the right cooling total inlet of the multistage cooling unit, the outlets of the first cooler, the second cooler and the third cooler are all connected with the inlet of the side part of the temporary storage box, and the outlet of the top of the temporary storage box is connected with the inlet of the right side part of the second cooler and the inlet of the left side part of the third cooler through pipelines, an inlet at the top of the temporary storage box is used as a methanol inlet of the multistage cooling unit, an outlet at the bottom of the temporary storage box is used as a total cold outlet of the multistage cooling unit, a liquid phase outlet at the bottom of the synthesis tower is connected with a liquid phase inlet of the rake dryer through a pipeline so as to convey sodium methoxide and methanol solution into the rake dryer, the heat medium unit comprises a heat medium main pipe, a condensation main pipe, a first heat medium branch pipe, a second heat medium branch pipe, a first condensation branch pipe and a second condensation branch pipe, inlets of the first heat medium branch pipe and the second heat medium branch pipe are communicated with the heat medium main pipe, outlets of the first condensation branch pipe and the second condensation branch pipe are communicated with the condensation main pipe, the rake dryer comprises a cylinder body, a rotating shaft, rake teeth, a left rotating joint and a right rotating joint, the left end and the right end of the rotating shaft penetrate through side walls at the left end and the right end of the cylinder body respectively and are connected with the cylinder body in a rotating manner, and the plurality, each rake tooth is hollow, the hollow part is in a U shape, the free end of each rake tooth is sealed, one end of the free end is provided with a first branch inlet and a first branch outlet, the inner cavity of the rotating shaft is hollow, the two ends of the rotating shaft are sealed, the hollow inner cavity is divided into a left heat medium cavity from left to right, connecting cavities corresponding to the rake teeth in number and a right heat medium cavity by a plurality of vertical partition plates, each connecting cavity is divided into a heat medium inlet connecting cavity and a heat medium outlet connecting cavity by a horizontal partition plate, the outlet of the left heat medium cavity is communicated with the heat medium inlet connecting cavity of the adjacent connecting cavity, the heat medium inlet connecting cavities of the two adjacent connecting cavities are communicated with the heat medium outlet connecting cavities of the adjacent connecting cavities, the inlet of the right heat medium cavity is communicated with the heat medium outlet connecting cavity of the adjacent connecting cavity, each rake tooth is correspondingly communicated with one connecting cavity, and the heat medium inlet connecting cavity of each connecting cavity is provided with a second branch outlet, and the outlet of, The heat medium outlet connecting cavity of each connecting cavity is provided with a second branch inlet, the second branch outlet of each connecting cavity is connected with the first branch inlet of the rake teeth connected with the second branch inlet of each connecting cavity, the second branch inlet of each connecting cavity is connected with the first branch outlet of the rake teeth connected with the second branch inlet, the heat medium inlet of the left rotary joint is connected with the outlet of the first heat medium branch pipe, the heat medium outlet of the left rotary joint is communicated with the inlet of the left heat medium cavity, the heat medium inlet of the right rotary joint is communicated with the outlet of the right heat medium cavity, the heat medium outlet of the right rotary joint is connected with the inlet of the first condensing branch pipe, the left side wall, the right side wall and the ring wall of the cylinder are all of sandwich structures, the sandwich structures of the left side wall, the right side wall and the ring wall are communicated in pairs, the sandwich layer inlet communicated with the sandwich layer is arranged on the left side wall, the sandwich layer outlet communicated with the sandwich layer is arranged on the right side wall, the sandwich layer, the outlet of the interlayer is connected with the inlet of the second condensing branch pipe.
Preferably, the rake dryer further comprises at least two knocking rods, the two knocking rods are arranged in parallel with the rotating shaft and are placed on two sides of the rake teeth, the knocking rods can freely move in the cylinder body, and the length of the knocking rods is equal to that of the rotating shaft.
Preferably, the lower part of the right side of the rectifying tower is provided with a second liquid phase inlet, and the second liquid phase inlet of the rectifying tower is communicated with the first liquid phase inlet and the fourth pneumatic valve of the rectifying tower through pipelines.
Preferably, solid-state sodium methoxide alkaline process apparatus for producing still includes controller, temperature sensor is used for detecting the real-time temperature of alcohol alkali lye in the first pre-heater to carry real-time temperature to the controller, preset the temperature threshold value in the controller, real-time temperature more than or equal to temperature threshold value, the first pneumatic valve of controller control is closed, and the second pneumatic valve is opened, and real-time temperature is less than the temperature threshold value, and the first pneumatic valve of controller control is opened, and the second pneumatic valve is closed.
Preferably, solid-state sodium methoxide alkaline process apparatus for producing still includes humidity transducer, temperature sensor is used for detecting the real-time water content of temporary storage incasement methanol-liquid, the water content threshold value has been preset in the controller, and real-time water content more than or equal to water content threshold value, controller control third pneumatic valve close, and the fourth pneumatic valve is opened, and real-time water content is less than the water content threshold value, and controller control third pneumatic valve opens, and the fourth pneumatic valve closes.
The utility model discloses the rake dryer of well configuration, the heat medium passes through left rotary joint and gets into the left heat medium chamber of pivot, the chamber is connected to the heat medium of advancing of the first connection cavity of reentrant, the U font cavity of the corresponding rake teeth of reentrant, flow back to the first play heat medium of connecting the cavity and connect the chamber again, the play heat medium of connecting the cavity again gets into the second and connects the chamber is connected to the heat medium of advancing of cavity from the first heat medium of connecting the cavity, so circulation, get into right heat medium chamber at last, rethread dextrorotation adapter flows to condensation house steward, heat medium in pivot and the rake teeth can flow unobstructed, it is abundant to transfer heat, the abundant quilt that has ensured heating pivot and rake teeth is heated.
The utility model discloses the multistage cooling unit that sets up in has three cooler, the top of the tower steam is cooled off the back to the case of keeping in one or several one by one in through three cooler, then one or several circulative cooling in the rethread pipeline backward flow to three cooler, can guarantee the cooling process requirement, compare with single cooler, multistage cooling unit can carry out the adjustment of the cooler number that the top of the tower steam flowed through according to the extraction volume of difference, also can adjust the number of the cooler of backward flow, the drawback of single cooler cooling insufficiency or cooling excessively has been avoided, the reasonable consumption of energy consumption has been guaranteed, the requirement of the accurate regulation and control of synthetic tower and rectifying column operating condition has been satisfied.
Drawings
Fig. 1 is a schematic structural diagram of the solid sodium methoxide alkaline process production device.
Fig. 2 is a partially enlarged view showing a connection relationship between the rake dryer and the heat medium unit.
Fig. 3 is a longitudinal sectional view of the rake teeth.
Fig. 4 is a cross-sectional view of the spindle.
In the figure: the system comprises a sodium methoxide synthesis unit 10, a first preheater 11, a first pneumatic valve 111, a synthesis tower 12, a rectifying tower 13, a multistage cooling unit 14, a second pneumatic valve 141, a third pneumatic valve 142, a fourth pneumatic valve 143, a first cooler 144, a second cooler 145, a third cooler 146, a temporary storage tank 147, a second preheater 15, a rake dryer 20, a rotating shaft 21, a left heat medium cavity 211, a connecting cavity 212, a heat medium inlet connecting cavity 2121, a second branch inlet 21211, a heat medium outlet connecting cavity 2122, a second branch outlet 21221, a right heat medium cavity 213, rake teeth 22, a first branch inlet 221, a first branch outlet 222, a left rotary joint 23, a right rotary joint 24, a interlayer inlet 25, an interlayer outlet 26, a cylinder 27, a heat medium unit 30, a heat medium header 31 and a condensation header 32.
Detailed Description
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required to be used in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and it is obvious for those skilled in the art that other drawings can be obtained according to these drawings without creative efforts.
Referring to fig. 1 to 4, an embodiment of the present invention provides a solid sodium methoxide alkaline process production apparatus, including a sodium methoxide synthesis unit 10, a rake dryer 20, and a heating medium unit 30, the sodium methoxide synthesis unit 10 includes a first preheater 11, a synthesis tower 12, a rectification tower 13, a multi-stage cooling unit 14, and a second preheater 15, the upper portion of the left side of the synthesis tower 12 has a raw material inlet, an alcohol alkali solution enters the shell pass of the first preheater 11, the alcohol alkali solution is heated by the first preheater 11 and then is added into the synthesis tower 12 through the raw material inlet, the top of the synthesis tower 12 has a gas phase outlet, the lower portion of the left side of the rectification tower 13 has a gas phase inlet, the gas phase outlet of the synthesis tower 12 is connected with the gas phase inlet of the rectification tower 13 through a pipeline, so that a gaseous mixture of methanol and water in the synthesis tower 12 is sent into the rectification tower 13, the top of the rectification tower 13 has a gas phase outlet, the gas phase outlet of the rectification tower 13 is connected, a first pneumatic valve 111 is arranged on a pipeline between a gas phase outlet of the rectifying tower 13 and the first preheater 11, a tube pass inlet and outlet of the first preheater 11 is connected with a cooling main inlet on the right side of the multistage cooling unit 14, a gas phase outlet of the rectifying tower 13 is connected with a cooling main inlet on the left side of the multistage cooling unit 14, a second pneumatic valve 141 is arranged on a pipeline between the cooling main inlet on the left side of the multistage cooling unit 14 and the gas phase outlet of the rectifying tower 13, the second pneumatic valve 141 is arranged between the first pneumatic valve 111 and the multistage cooling unit 14, the multistage cooling unit 14 is provided with a methanol inlet to supplement anhydrous methanol for the multistage cooling unit 14, the multistage cooling unit 14 is provided with a main cooling outlet, the main cooling outlet of the multistage cooling unit 14 is connected with the second preheater 15 through a pipeline, a third pneumatic valve 142 is arranged on a pipeline between the multistage cooling unit 14 and the second preheater 15, a first liquid phase inlet is arranged at the upper part of the right side of the rectifying tower 13, a total cooling outlet of the multistage cooling unit 14 is connected with the first liquid phase inlet of the rectifying tower 13 through a pipeline, a fourth pneumatic valve 143 is arranged on the pipeline between the multistage cooling unit 14 and the rectifying tower 13, the fourth pneumatic valve 143 is positioned between the third pneumatic valve 142 and the rectifying tower 13, the lower part of the left side of the synthesis tower 12 is provided with a methanol return port, an outlet of the second preheater 15 is connected with the methanol return port of the synthesis tower 12 through a pipeline, the multistage cooling unit 14 comprises a first cooler 144, a second cooler 145, a third cooler 146 and a temporary storage box 147, the left inlet of the first cooler 144 is used as a cooling total inlet at the left side of the multistage cooling unit 14, the right inlet of the first cooler 144 and the left inlet of the second cooler 145 are used as cooling total inlets at the right side of the multistage cooling unit 14, the first cooler 144, the second cooler 145 and the left inlet of the second cooler 145 are used, The outlets of the third coolers 146 are all connected with the inlets at the side parts of the temporary storage tank 147, the outlet at the top part of the temporary storage tank 147 is connected with the inlet at the right side of the second cooler 145 and the inlet at the left side of the third cooler 146 through pipelines, the inlet at the top part of the temporary storage tank 147 is used as a methanol inlet of the multistage cooling unit 14, the outlet at the bottom part of the temporary storage tank 147 is used as a total cold outlet of the multistage cooling unit 14, the liquid phase outlet at the bottom part of the synthesis tower 12 is connected with the liquid phase inlet of the rake dryer 20 through pipelines so as to convey sodium methoxide and methanol solution into the rake dryer 20, the heat medium unit 30 comprises a heat medium main pipe 31, a condensation main pipe 32, a first heat medium branch pipe, a second heat medium branch pipe, a first condensation branch pipe and a second condensation branch pipe, the inlets of the first heat medium branch pipe and the second heat medium branch pipe are all communicated with the heat medium main pipe 31, and the outlets of the first condensation branch pipe and the second condensation branch pipe are, the rake dryer 20 comprises a cylinder 27, a rotating shaft 21, rake teeth 22, a left rotary joint 23 and a right rotary joint 24, wherein the left end and the right end of the rotating shaft 21 respectively penetrate through the side walls of the left end and the right end of the cylinder 27 and are rotatably connected with the cylinder 27, a plurality of rake teeth 22 are uniformly distributed along the length direction of the rotating shaft 21, each rake tooth 22 is hollow, the hollow part is divided into a U shape, the free end of each rake tooth 22 is closed, one end opposite to the free end is provided with a first branch inlet 221 and a first branch outlet 222, the inner cavity of the rotating shaft 21 is hollow, the two ends are closed, the hollow inner cavity is divided into a left heat medium cavity 211 from left to right, connecting cavities 212 and a right heat medium cavity 213 with the number corresponding to that of the rake teeth 22 by a plurality of vertical partition plates, each connecting cavity 212 is divided into a heat medium connecting cavity 2121 and a heat medium connecting cavity 2122 by a horizontal partition plate, the outlet of the left heat medium cavity 211 is communicated with a heat medium, the heat medium connecting cavities 2121 and the heat medium discharging connecting cavities 2122 of adjacent two of the connecting cavities 212 are communicated, the inlet of the right heat medium cavity 213 is communicated with the heat medium connecting cavity 2122 of the adjacent connecting cavity 212, each of the rake teeth 22 is correspondingly communicated with one of the connecting cavities 212, the heat medium connecting cavity 2121 of each of the connecting cavities 212 has a second branch outlet 21221, the heat medium discharging connecting cavity 2122 of each of the connecting cavities 212 has a second branch inlet 21211, the second branch outlet 21221 of each of the connecting cavities 212 is connected with the first branch inlet 221 of the rake tooth 22 connected thereto, the second branch inlet 21211 of each of the connecting cavities 212 is connected with the first branch outlet 222 of the rake tooth 22 connected thereto, the heat medium inlet of the left rotary joint 23 is connected with the outlet of the first heat medium branch pipe, the heat medium outlet of the left rotary joint 23 is communicated with the inlet of the left heat medium cavity 211, the heat medium inlet of the right rotary joint 24 is communicated with the outlet of the right heat medium cavity 213, the heat medium outlet of the right rotary joint 24 is connected with the inlet of the first condensation branch pipe, the left side wall, the right side wall and the annular wall of the cylinder body 27 are of sandwich structures, the sandwich structures of the left side wall, the right side wall and the annular wall are communicated in pairs, the sandwich inlet 25 communicated with the sandwich layer is arranged on the left side wall, the sandwich outlet 26 communicated with the sandwich layer is arranged on the right side wall, the sandwich inlet 25 is connected with the outlet of the second heat medium branch pipe, and the sandwich outlet 26 is connected with the inlet of the second condensation branch pipe.
The terms "front" and "rear" in the present application refer to the inside and outside of the paper in fig. 1, respectively.
Alcohol lye is added from the top of the synthesis tower 12, anhydrous methanol steam required for dehydration is added from the bottom of the synthesis tower, the reaction is carried out by continuous countercurrent contact of the alcohol lye and the anhydrous methanol steam in the synthesis tower 12, the mole fraction of water in the liquid phase in the synthesis tower 12 is gradually reduced from the top of the synthesis tower to the bottom of the synthesis tower, the mole fraction of water in the gas phase is gradually reduced from the bottom of the synthesis tower to the top of the synthesis tower, vapor-liquid phase equilibrium is achieved at the top of the synthesis tower, the mixed steam of the methanol and the water is discharged from the top of the synthesis tower, the mixed steam contains 2 percent-3 percent of water by mass fraction, the rest is the methanol, the methanol is directly introduced into the rectification tower 13 for rectification and separation, the obtained anhydrous methanol enters the reboiler of the synthesis tower 12 for recycling, the sodium methoxide generated by the synthesis tower 12 is discharged from the bottom of the synthesis tower, the production process shows that the vapor at the top of the rectification tower 13 needs a large amount, and the first preheater 11 and the second preheater 15 also require steam heating, so that the required energy consumption is very large in the whole process.
The alcohol alkali liquor needs to be preheated to 70-100 ℃, and the anhydrous methanol needs to be preheated to 115-150 ℃ to produce methanol steam, and then the methanol steam enters the synthesis tower 12.
In this embodiment, a part of the steam at the top of the rectifying tower 13 enters the shell side of the first preheater 11 to heat the alcohol alkali solution, and the alcohol alkali solution is preheated while the steam at the top of the rectifying tower 13 is cooled, thereby reducing energy consumption.
The utility model discloses in the rake dryer 20 of configuration, the heat medium passes through left rotary joint 23 and gets into the left heat medium chamber 211 of pivot 21, the first heat medium of advancing that connects cavity 212 reenters connects chamber 2121, the U font cavity of the corresponding rake teeth 22 of reentrant, flow back to the first play heat medium that connects cavity 212 again and connect chamber 2122, the play heat medium that connects cavity 212 again connects chamber 2122 and gets into the second and connect chamber 2121 of advancing the heat medium that connects cavity 212, so circulation, get into right heat medium chamber 213 at last, rethread right rotary joint 24 flows to condensation header pipe 32, heat medium in pivot 21 and the rake teeth 22 can flow unobstructed, it is abundant to transfer heat, the abundant quilt that has guaranteed to heat pivot 21 and rake teeth 22 is heated.
The utility model discloses the multistage cooling unit 14 that sets up in has three cooler, after tower top steam cooled off one or several one by one in through three cooler to temporary storage case 147, then one or several circulative cooling in the pipeline backward flow to three cooler of rethread, can guarantee the cooling process requirement, compare with single cooler, multistage cooling unit 14 can carry out the adjustment of the cooler number that tower top steam flowed through according to the extraction volume of difference, also can adjust the number of the cooler of backward flow, the drawback of single cooler cooling insufficiency or excessive cooling has been avoided, the reasonable consumption of energy consumption has been guaranteed, the requirement of the accurate regulation and control of synthetic tower 12 and 13 operating conditions of rectifying tower has been satisfied.
Of course, more coolers can be added as needed, and the cooling capacity of each cooler can be different, for example, by adjusting the first cooler 144 to a suitable cooling rate, a small amount of water vapor in the top steam of the rectifying tower 13 just condenses and is separated from the methanol vapor by the first cooler 144.
In this embodiment, by reasonably adjusting the multistage cooling unit 14, the steam at the top of the rectifying tower 13 does not need to be preheated by the second preheater 15 after being cooled, so that the process requirement of entering the synthesizing tower 12 is met, and the heating energy consumption of the second preheater 15 is reduced.
Further, the rake dryer 20 further includes at least two rapping bars, which are disposed in parallel with the rotating shaft 21 and on both sides of the rake teeth 22, and the rapping bars can move freely in the cylinder 27, and have the same length as the rotating shaft 21.
The rapping bar continuously raps the material inside the cylinder 27 so that the material is continuously crushed to accelerate the drying process.
Referring to fig. 1, a second liquid phase inlet is disposed at a lower portion of the right side of the rectifying tower 13, and the second liquid phase inlet of the rectifying tower 13 is communicated with a pipeline between the first liquid phase inlet of the rectifying tower 13 and the fourth pneumatic valve 143 through a pipeline.
13 overhead steam of rectifying column flows back through second liquid phase entry after the cooling, can further optimize the process control of rectification, guarantees that anhydrous methanol moisture is up to standard.
Referring to fig. 1, further, the solid sodium methoxide alkaline process production device further includes a controller and a temperature sensor, the temperature sensor is used for detecting the real-time temperature of the alcohol alkali liquor in the first preheater 11 and conveying the real-time temperature to the controller, a temperature threshold is preset in the controller, the real-time temperature is greater than or equal to the temperature threshold, the controller controls the first pneumatic valve 111 to be closed, the second pneumatic valve 141 is opened, the real-time temperature is less than the temperature threshold, the controller controls the first pneumatic valve 111 to be opened, and the second pneumatic valve 141 to be closed.
In this embodiment, through the automatic control means, can keep first preheater 11 to satisfy the technological requirement to preheating of alcohol lye, can also the rational utilization of rectifying column 13 top of the tower steam's waste heat, guaranteed the reasonable consumption of energy consumption, also avoided manual operation's trouble.
Referring to fig. 1, further, solid-state sodium methoxide alkaline process apparatus for producing still includes humidity transducer, and temperature sensor is used for detecting the real-time water content of the interior methanol liquid of temporary storage case 147, has preset the water content threshold in the controller, and real-time water content more than or equal to water content threshold, controller control third pneumatic valve 142 close, and fourth pneumatic valve 143 is opened, and real-time water content is less than the water content threshold, and controller control third pneumatic valve 142 opens, and fourth pneumatic valve 143 closes.
The rectifying tower 13 is in an unstable state at the initial startup stage, and the rectifying tower 13 is gradually adjusted to a stable state through reflux after the steam at the top of the rectifying tower 13 is cooled.
The embodiment of the utility model provides a module or unit in the device can merge, divide and delete according to actual need.
While the invention has been described with reference to a preferred embodiment, it will be understood by those skilled in the art that various changes in form and details may be made therein without departing from the spirit and scope of the invention.
Claims (5)
1. The utility model provides a solid-state sodium methoxide alkali method apparatus for producing which characterized in that: including sodium methoxide synthesis unit, rake dryer, heat medium unit, sodium methoxide synthesis unit includes first preheater, synthetic tower, rectifying column, multistage cooling unit, second preheater, synthetic tower left side upper portion has a raw materials entry, and alcohol lye gets into the shell side of first preheater, adds the synthetic tower through raw materials entry after first preheater heats, the synthetic tower top has a gaseous phase export, the lower part has a gaseous phase entry in the rectifying column left side, and the gaseous phase export of synthetic tower and the gaseous phase entry of rectifying column are with the pipe connection to make the gaseous mixture of methyl alcohol and water in the synthetic tower send into the rectifying column, rectifying column top has a gaseous phase export, and the gaseous phase export of rectifying column and the pipe-pass entry linkage of first preheater, install first pneumatic valve on the pipeline between the gaseous phase export of rectifying column and the first preheater, the tube pass inlet and outlet of the first preheater is connected with the cooling total inlet on the right side of the multistage cooling unit, the gas phase outlet of the rectifying tower is connected with the cooling total inlet on the left side of the multistage cooling unit, the second pneumatic valve is arranged on a pipeline between the cooling total inlet on the left side of the multistage cooling unit and the gas phase outlet of the rectifying tower, the second pneumatic valve is positioned between the first pneumatic valve and the multistage cooling unit, the multistage cooling unit is provided with a methanol inlet to supplement anhydrous methanol for the multistage cooling unit, the multistage cooling unit is provided with a total cooling outlet, the total cooling outlet of the multistage cooling unit is connected with the second preheater through a pipeline, the third pneumatic valve is arranged on the pipeline between the multistage cooling unit and the second preheater, the upper part on the right side of the rectifying tower is provided with a first liquid phase inlet, and the total cooling outlet of the multistage cooling unit is connected with the first liquid phase inlet of the rectifying tower through a pipeline, a fourth pneumatic valve is arranged on a pipeline between the multistage cooling unit and the rectifying tower, the fourth pneumatic valve is positioned between the third pneumatic valve and the rectifying tower, the lower part of the left side of the synthesizing tower is provided with a methanol return port, the outlet of the second preheater is connected with the methanol return port of the synthesizing tower through a pipeline, the multistage cooling unit comprises a first cooler, a second cooler, a third cooler and a temporary storage box, the left inlet of the first cooler is used as the left cooling total inlet of the multistage cooling unit, the right inlet of the first cooler and the left inlet of the second cooler are used as the right cooling total inlet of the multistage cooling unit, the outlets of the first cooler, the second cooler and the third cooler are all connected with the inlet of the side part of the temporary storage box, and the outlet of the top of the temporary storage box is connected with the inlet of the right side part of the second cooler and the inlet of the left side part of the third cooler through pipelines, an inlet at the top of the temporary storage box is used as a methanol inlet of the multistage cooling unit, an outlet at the bottom of the temporary storage box is used as a total cold outlet of the multistage cooling unit, a liquid phase outlet at the bottom of the synthesis tower is connected with a liquid phase inlet of the rake dryer through a pipeline so as to convey sodium methoxide and methanol solution into the rake dryer, the heat medium unit comprises a heat medium main pipe, a condensation main pipe, a first heat medium branch pipe, a second heat medium branch pipe, a first condensation branch pipe and a second condensation branch pipe, inlets of the first heat medium branch pipe and the second heat medium branch pipe are communicated with the heat medium main pipe, outlets of the first condensation branch pipe and the second condensation branch pipe are communicated with the condensation main pipe, the rake dryer comprises a cylinder body, a rotating shaft, rake teeth, a left rotating joint and a right rotating joint, the left end and the right end of the rotating shaft penetrate through side walls at the left end and the right end of the cylinder body respectively and are connected with the cylinder body in a rotating manner, and the plurality, each rake tooth is hollow, the hollow part is in a U shape, the free end of each rake tooth is sealed, one end of the free end is provided with a first branch inlet and a first branch outlet, the inner cavity of the rotating shaft is hollow, the two ends of the rotating shaft are sealed, the hollow inner cavity is divided into a left heat medium cavity from left to right, connecting cavities corresponding to the rake teeth in number and a right heat medium cavity by a plurality of vertical partition plates, each connecting cavity is divided into a heat medium inlet connecting cavity and a heat medium outlet connecting cavity by a horizontal partition plate, the outlet of the left heat medium cavity is communicated with the heat medium inlet connecting cavity of the adjacent connecting cavity, the heat medium inlet connecting cavities of the two adjacent connecting cavities are communicated with the heat medium outlet connecting cavities of the adjacent connecting cavities, the inlet of the right heat medium cavity is communicated with the heat medium outlet connecting cavity of the adjacent connecting cavity, each rake tooth is correspondingly communicated with one connecting cavity, and the heat medium inlet connecting cavity of each connecting cavity is provided with a second branch outlet, and the outlet of, The heat medium outlet connecting cavity of each connecting cavity is provided with a second branch inlet, the second branch outlet of each connecting cavity is connected with the first branch inlet of the rake teeth connected with the second branch inlet of each connecting cavity, the second branch inlet of each connecting cavity is connected with the first branch outlet of the rake teeth connected with the second branch inlet, the heat medium inlet of the left rotary joint is connected with the outlet of the first heat medium branch pipe, the heat medium outlet of the left rotary joint is communicated with the inlet of the left heat medium cavity, the heat medium inlet of the right rotary joint is communicated with the outlet of the right heat medium cavity, the heat medium outlet of the right rotary joint is connected with the inlet of the first condensing branch pipe, the left side wall, the right side wall and the ring wall of the cylinder are all of sandwich structures, the sandwich structures of the left side wall, the right side wall and the ring wall are communicated in pairs, the sandwich layer inlet communicated with the sandwich layer is arranged on the left side wall, the sandwich layer outlet communicated with the sandwich layer is arranged on the right side wall, the sandwich layer, the outlet of the interlayer is connected with the inlet of the second condensing branch pipe.
2. The apparatus for producing solid sodium methoxide by alkaline process as claimed in claim 1, wherein: the rake dryer further comprises at least two knocking rods, the two knocking rods are arranged in parallel with the rotating shaft and are arranged on two sides of the rake teeth, the knocking rods can freely move in the cylinder body, and the length of the knocking rods is equal to that of the rotating shaft.
3. The apparatus for producing solid sodium methoxide by alkaline process as claimed in claim 1, wherein: and a second liquid phase inlet is formed in the lower part of the right side of the rectifying tower and is communicated with the first liquid phase inlet and the fourth pneumatic valve of the rectifying tower through pipelines.
4. The apparatus for producing solid sodium methoxide by alkaline process as claimed in claim 1, wherein: solid-state sodium methoxide alkaline process apparatus for producing still includes controller, temperature sensor is used for detecting the real-time temperature of the interior alcohol lye of first pre-heater to carry real-time temperature to the controller, preset the temperature threshold value in the controller, real-time temperature more than or equal to temperature threshold value, the first pneumatic valve of controller control is closed, and the second pneumatic valve is opened, and real-time temperature is less than the temperature threshold value, and the first pneumatic valve of controller control is opened, and the second pneumatic valve is closed.
5. The apparatus for producing solid sodium methoxide by alkaline process as claimed in claim 4, wherein: solid-state sodium methoxide alkaline process apparatus for producing still includes humidity transducer, temperature sensor is used for detecting the real-time water content of temporary storage incasement methanol-liquid, the water content threshold value has been preset in the controller, and real-time water content more than or equal to water content threshold value, controller control third pneumatic valve close, and the fourth pneumatic valve is opened, and real-time water content is less than the water content threshold value, and the controller controls the third pneumatic valve to open, and the fourth pneumatic valve closes.
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| CN201920407829.1U CN209741032U (en) | 2019-03-28 | 2019-03-28 | Solid sodium methoxide alkaline process production device |
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| CN201920407829.1U CN209741032U (en) | 2019-03-28 | 2019-03-28 | Solid sodium methoxide alkaline process production device |
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