CN209741030U - Solid sodium methoxide alkaline production device for recovering methanol by vacuum pump - Google Patents
Solid sodium methoxide alkaline production device for recovering methanol by vacuum pump Download PDFInfo
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- CN209741030U CN209741030U CN201920407371.XU CN201920407371U CN209741030U CN 209741030 U CN209741030 U CN 209741030U CN 201920407371 U CN201920407371 U CN 201920407371U CN 209741030 U CN209741030 U CN 209741030U
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- OKKJLVBELUTLKV-UHFFFAOYSA-N Methanol Chemical compound OC OKKJLVBELUTLKV-UHFFFAOYSA-N 0.000 title claims abstract description 324
- WQDUMFSSJAZKTM-UHFFFAOYSA-N Sodium methoxide Chemical compound [Na+].[O-]C WQDUMFSSJAZKTM-UHFFFAOYSA-N 0.000 title claims abstract description 80
- 239000007787 solid Substances 0.000 title claims abstract description 20
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 12
- 238000001816 cooling Methods 0.000 claims abstract description 123
- 230000015572 biosynthetic process Effects 0.000 claims abstract description 40
- 238000003786 synthesis reaction Methods 0.000 claims abstract description 40
- 238000000034 method Methods 0.000 claims abstract description 30
- 238000011084 recovery Methods 0.000 claims abstract description 25
- 239000007788 liquid Substances 0.000 claims abstract description 15
- 239000000463 material Substances 0.000 claims abstract description 13
- 239000007789 gas Substances 0.000 claims description 37
- 230000000903 blocking effect Effects 0.000 claims description 28
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 28
- 238000007789 sealing Methods 0.000 claims description 27
- 239000007791 liquid phase Substances 0.000 claims description 23
- 238000003860 storage Methods 0.000 claims description 21
- 239000012071 phase Substances 0.000 claims description 19
- 230000000694 effects Effects 0.000 claims description 17
- 239000007792 gaseous phase Substances 0.000 claims description 13
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 claims description 12
- 238000003825 pressing Methods 0.000 claims description 12
- 239000003513 alkali Substances 0.000 claims description 8
- 239000002994 raw material Substances 0.000 claims description 6
- 230000002194 synthesizing effect Effects 0.000 claims description 5
- 235000017166 Bambusa arundinacea Nutrition 0.000 claims description 4
- 235000017491 Bambusa tulda Nutrition 0.000 claims description 4
- 241001330002 Bambuseae Species 0.000 claims description 4
- 235000015334 Phyllostachys viridis Nutrition 0.000 claims description 4
- 230000000712 assembly Effects 0.000 claims description 4
- 238000000429 assembly Methods 0.000 claims description 4
- 239000011425 bamboo Substances 0.000 claims description 4
- 239000002826 coolant Substances 0.000 claims description 3
- 239000008246 gaseous mixture Substances 0.000 claims description 3
- 238000005086 pumping Methods 0.000 claims description 3
- 239000013589 supplement Substances 0.000 claims description 3
- 239000011229 interlayer Substances 0.000 claims description 2
- 238000000605 extraction Methods 0.000 abstract description 3
- 230000004888 barrier function Effects 0.000 abstract 2
- 238000009833 condensation Methods 0.000 abstract 1
- 230000005494 condensation Effects 0.000 abstract 1
- 238000005265 energy consumption Methods 0.000 description 6
- 238000010438 heat treatment Methods 0.000 description 3
- 230000001174 ascending effect Effects 0.000 description 2
- 230000018044 dehydration Effects 0.000 description 2
- 238000006297 dehydration reaction Methods 0.000 description 2
- 238000001035 drying Methods 0.000 description 2
- 239000010410 layer Substances 0.000 description 2
- 238000004064 recycling Methods 0.000 description 2
- 238000010079 rubber tapping Methods 0.000 description 2
- 238000000926 separation method Methods 0.000 description 2
- 238000006243 chemical reaction Methods 0.000 description 1
- 238000004140 cleaning Methods 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 239000000945 filler Substances 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 238000004886 process control Methods 0.000 description 1
- 238000010992 reflux Methods 0.000 description 1
- 230000003068 static effect Effects 0.000 description 1
- 239000002918 waste heat Substances 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
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Abstract
A solid sodium methoxide alkaline process production device for recovering methanol by using a vacuum pump comprises a sodium methoxide synthesis unit, a rake dryer and a methanol negative pressure recovery device, wherein the force of a knocking rod for a second barrier block is vertical to a fixed rod, a rotating shaft connected with the fixed rod is only subjected to the torque action of the knocking rod, the rotating shaft is not bent, the knocking rod strikes the second barrier block, then vibration is provided for the fixed rod and the rotating shaft, material adhesion on the rotating shaft can be removed, a diversion sieve plate is arranged in a cooling tower body in a staggered manner from top to bottom, condensed liquid methanol can be effectively utilized to capture methanol gas, further condensation of the methanol gas is promoted, the methanol gas volatilized in the rake dryer is effectively recovered, the problem of low methanol recovery rate caused by the exhaustion of the methanol gas which is not condensed is solved, a multistage cooling unit can adjust the number of coolers through which steam flows on the top of the tower according to different extraction amounts, 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 utilize solid-state sodium methoxide alkali method apparatus for producing of vacuum pump recovery methyl alcohol.
Background
The industrial alkaline method 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 a key point for controlling the production process of the sodium methoxide, a single cooler is adopted for cooling the steam at the top of the conventional rectifying tower, 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 liquid sodium methoxide is subjected to drying treatment by a rake dryer subsequently, materials with larger viscosity are easy to adhere to a rotating shaft, a conventional knocking rod directly hits the rotating shaft, the rotating shaft can be bent, the normal work can not be caused, and the methanol generated in the drying process of the sodium methoxide is pumped out by a vacuum pump, and the methanol enters a storage tank with a cooling interlayer, so that the methanol cannot be cooled, and a part of methanol gas is exhausted by a vacuum pump to cause methanol waste.
Disclosure of Invention
In view of the above, it is necessary to provide a solid sodium methoxide alkaline process production apparatus capable of recovering methanol by using a vacuum pump with high methanol recovery rate.
The utility model provides an utilize solid-state sodium methoxide alkaline process apparatus for producing of vacuum pump recovery methyl alcohol, includes sodium methoxide synthesis unit, rake dryer, methyl alcohol negative pressure recovery unit, sodium methoxide synthesis unit includes first preheater, converter, rectifying column, multistage cooling unit, second preheater, converter left side upper portion has a raw materials entry, and alcohol lye gets into the shell side of first preheater, adds the converter through raw materials entry after first preheater heating, the converter top has a gaseous phase export, lower part has a gaseous phase entry in the rectifying column left side, and the gaseous phase export of converter and the pipeline connection for the gaseous phase entry of rectifying column are to make the gaseous mixture of methyl alcohol and water in the converter send into the rectifying column, rectifying column top has a gaseous phase export, and the gaseous phase export of rectifying column and the tube side entry of first preheater are connected, a first pneumatic valve is arranged on a pipeline between a gas phase outlet of the rectifying tower and the first preheater, a tube pass inlet and outlet of the first preheater is connected with a cooling total inlet on the right side of the multistage cooling unit, a gas phase outlet of the rectifying tower is connected with a cooling total inlet on the left side of the multistage cooling unit, a 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, a third pneumatic valve is arranged on the pipeline between the multistage cooling unit and the second preheater, a first liquid phase inlet is arranged at the upper part of the right side of the rectifying tower, 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 installed on the pipeline between the multistage cooling unit and the rectifying tower and located between the third pneumatic valve and the rectifying tower, the lower portion 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 total cooling 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 total cooling inlet on the right side of the multistage cooling unit, the outlets of the first cooler, the second cooler and the third cooler are connected with the inlet on the side of the temporary storage box, and the outlet on the top of the temporary storage box is connected with the inlet on the right side of the second cooler, The left inlet of the third cooler is connected through a pipeline, the inlet at the top of the temporary storage box is used as a methanol inlet of the multistage cooling unit, the outlet at the bottom of the temporary storage box is used as a total cold outlet of the multistage cooling unit, the liquid phase outlet at the bottom of the synthesis tower is connected with the liquid phase inlet of the rake dryer through a pipeline so as to convey sodium methoxide and methanol solution into the rake dryer, the rake dryer comprises a barrel, a rotating shaft and a knocking component, the left end and the right end of the rotating shaft are respectively and rotatably connected with the end surfaces of the two ends of the barrel, the knocking component comprises a fixed rod, a knocking rod, a first blocking block and a second blocking block, the fixed rod is vertically arranged relative to the rotating shaft, one end of the fixed rod is a connecting end, the connecting end of the fixed rod is fixedly connected with the rotating shaft, the other end of the fixed rod is a free end, one end of the, the other end of the knocking rod is a free end, a first blocking block and a second blocking block are arranged on the fixed rod, the first blocking block is arranged close to the free end of the fixed rod, the second blocking block is arranged close to the connecting end of the fixed rod, the included angle between the knocking rod and the fixed rod is 180 degrees, the first blocking block prevents the knocking rod from rotating anticlockwise, the included angle between the knocking rod and the fixed rod is 0 degree, the second blocking block prevents the knocking rod from rotating clockwise, the methanol negative pressure recovery device comprises a cooling tower and a first vacuum pump, a gas phase inlet at the bottom of the cooling tower is connected with a gas phase outlet of a cylinder of the rake dryer so that methanol gas volatilized from the rake dryer enters the cooling tower, an inlet of the first vacuum pump is connected with a pumping port at the top of the cooling tower so as to provide pumping force for the methanol gas to enter the cooling tower, the cooling tower comprises a tower body and guide sieve plates which are arranged in the tower body, the tower body is sandwich structure, and the intermediate layer of tower body circulates in the flow has coolant, the direction sieve level sets up in the tower body, and the one end and the tower body inner wall of direction sieve are connected, and the other end and the tower body inner wall of direction sieve are disconnected, and the one end that the relative and tower body of direction sieve do not connect is crooked upwards.
Preferably, the solid sodium methoxide alkaline production device for recovering methanol by using the vacuum pump further comprises a negative pressure discharge device, a discharge opening is formed in the bottom of the cylinder of the rake dryer, the cross section of the discharge opening is trapezoidal, the negative pressure discharge device comprises a negative pressure cylinder, a guide sleeve, a guide rod, a valve body, a hand wheel, a flexible connection, a vent valve, a second vacuum pump, a sealing cover and a pressing assembly, the upper end of the negative pressure cylinder is open, the lower end of the negative pressure cylinder is closed, a secondary discharge opening is formed in the end face of the closed end of the negative pressure cylinder, the upper end face of the negative pressure cylinder is tightly attached to the outer side bottom wall of the cylinder of the rake dryer, the inner cavity of the cylinder of the rake dryer is communicated with the inner cavity of the negative pressure cylinder through the discharge opening, the lower end of the guide sleeve is fixedly connected with the inner side bottom wall of the negative pressure cylinder, a, the upper end of the guide rod is provided with a valve body, the lower end of the guide rod is provided with a hand wheel, the central line of the guide hole, the central line of the guide rod and the central line of the valve body are all superposed with the central line of the primary discharge opening, the shape of the valve body is matched with the cavity of the primary discharge opening, the guide rod is driven to rotate by rotating the hand wheel, the guide rod moves upwards or downwards relative to the guide sleeve to cover or open the primary discharge opening, the valve body is flexibly connected with the guide sleeve, the soft connection is made of air-tight material, the upper part of the annular wall of the negative pressure cylinder is provided with an air vent, the air vent is provided with an air release valve, the upper part of the annular wall of the negative pressure cylinder is provided with a negative pressure port which is connected with an inlet of a second vacuum pump, at least two pressing components are arranged, the pressing assemblies are uniformly distributed along the annular wall of the negative pressure cylinder, the sealing covers cover the secondary discharge opening, and the sealing covers and the negative pressure cylinder are relatively fixed through the pressing assemblies.
Preferably, compress tightly the subassembly including solid fixed ring, activity earrings, puller bolt, gu fixed ring and negative pressure section of thick bamboo fixed connection, the activity earrings becomes L shape, and the activity earrings includes vertical section, horizontal segment, and vertical section rotates with solid fixed ring to be connected, is equipped with the screw hole with puller bolt threaded connection on the horizontal segment, puller bolt dextrorotation or levogyration to with sealed lid and negative pressure section of thick bamboo relatively fixed or loosen.
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, utilize solid-state sodium methoxide alkaline process apparatus for producing of vacuum pump recovery methyl alcohol 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, utilize solid-state sodium methoxide alkaline process apparatus for producing of vacuum pump recovery methyl alcohol 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 in, strike the pole and block the power that the piece was perpendicular with the dead lever for the second, the pivot of being connected with the dead lever only receives the moment effect of striking the pole, can not cause the pivot crooked, strikes the pole and hits the second and block the piece, then provides the vibration and gives dead lever, pivot, can get rid of the epaxial material adhesion of commentaries on classics.
The utility model discloses in, the crisscross water conservancy diversion sieve that sets up of top-down in the cooling tower body can effectively utilize the liquid methyl alcohol that has condensed to catch methyl alcohol gas, and then promotes methyl alcohol gas to condense, and the effectual methyl alcohol gas that volatilizees in having retrieved the rake dryer has reduced the problem that the methyl alcohol rate of recovery that causes is low too late to condense the outer row of methyl alcohol gas.
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 apparatus for recovering methanol by using a vacuum pump.
Fig. 2 is a schematic view showing the internal structure of the rake dryer and the negative pressure discharge device.
FIG. 3 is a front view of the rapping assembly.
FIG. 4 is a right side view of the rapping assembly.
Fig. 5 is an enlarged view of the hold-down assembly.
Fig. 6 is a partial view showing the internal structure of the cooling tower.
In the figure: the device 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 cylinder 21, a primary discharge port 211, a rotating shaft 22, a knocking assembly 23, a fixing rod 231, a knocking rod 232, a first blocking block 233, a second blocking block 234, a negative pressure discharge device 30, a negative pressure cylinder 31, a secondary discharge port 311, a guide sleeve 32, a guide rod 33, a valve body 34, a hand wheel 35, a flexible connection 36, a vent valve 37, a sealing cover 38, a pressing assembly 39, a fixing ring 391, a movable lug ring 392, a top tightening bolt 393, a methanol negative pressure recovery device 40, a cooling tower 41, a tower body 411, a guide sieve plate 412 and a first vacuum pump 42.
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 6, an embodiment of the present invention provides a solid sodium methoxide alkaline process production apparatus using a vacuum pump to recover methanol, including a sodium methoxide synthesis unit 10, a rake dryer 20, and a methanol negative pressure recovery apparatus 40, where the sodium methoxide synthesis unit 10 includes a first preheater 11, a synthesis tower 12, a rectification tower 13, a multistage 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 side of the first preheater 11, and is heated by the first preheater 11 and then 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 to 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 of the rectifying tower 13 is connected with a tube pass inlet of the first preheater 11, a first pneumatic valve 111 is arranged on a pipeline between the 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 positioned 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, and 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 a 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 storage box 147, a left side inlet of the first cooler 144 is used as a left side cooling total inlet of the multistage cooling unit 14, a right side inlet of the first cooler 144 and a left side inlet of the second cooler 145 are used as a right side cooling total inlet of the multistage cooling unit 14, outlets of the first cooler 144, the second cooler 145 and the third cooler 146 are all connected with inlets at the side portions of the temporary storage tank 147, an outlet at the top portion of the temporary storage tank 147 is connected with an inlet at the right side of the second cooler 145 and an inlet at the left side of the third cooler 146 through pipelines, an inlet at the top portion of the temporary storage tank 147 is used as a methanol inlet of the multistage cooling unit 14, an outlet at the bottom portion of the temporary storage tank 147 is used as a total cooling outlet of the multistage cooling unit 14, a liquid phase outlet at the bottom portion of the synthesis tower 12 is connected with a liquid phase inlet of the rake dryer 20 through a pipeline so as to convey sodium methoxide and methanol solution into the rake dryer 20, the rake dryer 20 comprises a cylinder 21, a rotating shaft 22 and a knocking assembly 23, the left end and the right end of the rotating shaft 22 are respectively rotatably connected with end faces at two ends of the cylinder 21, the knocking assembly 23 comprises a fixing rod 231, a knocking rod 232, a first blocking block 233 and a second blocking, one end of the fixing rod 231 is a connecting end, the connecting end of the fixing rod 231 is fixedly connected with the rotating shaft 22, the other end of the fixing rod 231 is a free end, one end of the knocking rod 232 is a connecting end, the connecting end of the knocking rod 232 is rotatably connected with the free end of the fixing rod 231, the other end of the knocking rod 232 is a free end, the fixing rod 231 is provided with a first blocking block 233 and a second blocking block 234, the first blocking block is arranged close to the free end of the fixing rod 231, the second blocking block is arranged close to the connecting end of the fixing rod 231, an included angle between the knocking rod 232 and the fixing rod 231 is 180 degrees, the first blocking block 233 prevents the knocking rod 232 from rotating anticlockwise, the included angle between the knocking rod 232 and the fixing rod 231 is 0 degree, the second blocking block 234 prevents the knocking rod 232 from rotating clockwise, the methanol negative pressure recovery device 40 comprises a cooling tower 41 and a first vacuum pump 42, a gas phase inlet at the bottom of the cooling tower, so that the methanol gas volatilized from the interior of the rake dryer 20 enters the cooling tower 41, the inlet of the first vacuum pump 42 is connected with the top evacuation port of the cooling tower 41 to provide suction for the methanol gas entering the cooling tower 41, the cooling tower 41 comprises a tower body 411 and guide sieve plates 412 which are staggered from top to bottom in the tower body 411, the tower body 411 is of a sandwich structure, a cooling medium flows through the sandwich layer of the tower body 411, the guide sieve plates 412 are horizontally arranged in the tower body 411, one end of each guide sieve plate 412 is connected with the inner wall of the tower body 411, the other end of each guide sieve plate 412 is not connected with the inner wall of the tower body 411, and the guide sieve plates 412 are bent upwards relative to the end which is not connected.
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 methanol gas volatilized from the rake dryer 20 enters from the bottom of the cooling tower 41 under the suction action of the first vacuum pump 42, and meanders upwards along the guide sieve plate 412, the methanol gas is continuously condensed into liquid in the ascending process, liquid methanol with a certain liquid level is formed on the guide sieve plate 412, a part of the liquid methanol intensively flows down from the sieve holes of the guide sieve plate 412, and a part of the liquid methanol flows meanders downwards from top to bottom along the guide sieve plate 412, so that the liquid level of the liquid methanol on the lower guide sieve plate 412 is supplemented, and the methanol gas is continuously cooled by the side wall of the tower body 411 in the ascending process of the tower body 411, and is continuously captured to form the liquid methanol due to full contact with the raindrop-shaped liquid methanol.
The phrase "the angle between the tapping rod 232 and the fixing rod 231 is 0 °" means that the connecting end of the fixing rod 231 coincides with the free end of the tapping rod 232.
The rotation of the striking rod 232, herein referred to as counterclockwise or clockwise, is the direction of the reader's view in the paper in fig. 3.
Initially, when the included angle between the knocking rod 232 and the fixing rod 231 is 0 °, at this time, the initial angle of the fixing rod 231 is located at 0 °, the included angle between the knocking rod 232 and the fixing rod 231 is continuously increased along with the continuous clockwise rotation of the fixing rod 231, until the fixing rod 231 rotates 180 °, the included angle between the knocking rod 232 and the fixing rod 231 is 180 °, due to the effect of the first blocking block 233, the fixing rod 231 continuously rotates clockwise, the included angle between the knocking rod 232 and the fixing rod 231 is always kept at 180 °, until the fixing rod 231 rotates 360 °, the knocking rod 232 rotates relative to the fixing rod 231 due to the effect of gravity, and then the fixing rod stops after striking the second blocking block 234.
The utility model discloses in, strike pole 232 and block the power of piece 234 for the second and be perpendicular with dead lever 231, the pivot 22 of being connected with dead lever 231 only receives the moment effect of striking pole 232, can not cause the pivot 22 crooked, strikes pole 232 and hits the second and block piece 234, then provides the vibration and gives dead lever 231, pivot 22, can get rid of the material adhesion in the pivot 22.
The utility model discloses in, the crisscross direction sieve 412 that sets up of top-down in the tower body 411 of cooling tower 41 can effectively utilize the liquid methyl alcohol that has condensed to catch the methyl alcohol gas, and then promotes the methyl alcohol gas to condense, and the effectual methyl alcohol gas who volatilizees in having retrieved rake dryer 20 has reduced the problem that the rate of recovery of methyl alcohol that causes is low too late to condense outer arranging of the methyl alcohol gas.
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.
Referring to fig. 1 to 6, further, the solid sodium methoxide alkaline process production apparatus for recovering methanol by using a vacuum pump further includes a negative pressure discharge apparatus 30, a primary discharge port 211 is disposed at the bottom of the cylinder 21 of the rake dryer 20, the cross section of the primary discharge port 211 is trapezoidal, the negative pressure discharge apparatus 30 includes a negative pressure cylinder 31, a guide sleeve 32, a guide rod 33, a valve body 34, a hand wheel 35, a flexible connection 36, a release valve 37, a second vacuum pump, a sealing cover 38, and a pressing assembly 39, the upper end of the negative pressure cylinder 31 is open, the lower end is closed, the end face of the closed end of the negative pressure cylinder 31 is provided with a secondary discharge port 311, the upper end face of the negative pressure cylinder 31 is tightly attached to the outer bottom wall of the cylinder 21 of the rake dryer 20, the inner cavity of the cylinder 21 of the rake dryer 20 is communicated with the inner cavity of the negative pressure cylinder 31 through the primary discharge port 211, the lower end of the guide sleeve 32, the guide rod 33 passes through the guide hole and is in threaded connection with the guide hole, the upper end of the guide rod 33 is provided with a valve body 34, the lower end of the guide rod 33 is provided with a hand wheel 35, the center line of the guide hole, the center line of the guide rod 33 and the center line of the valve body 34 are all superposed with the center line of the primary discharge port 211, the shape of the valve body 34 is matched with the cavity of the primary discharge port 211 so as to drive the guide rod 33 to rotate by rotating the hand wheel 35, the guide rod 33 moves upwards or downwards relative to the guide sleeve 32 to cover or open the primary discharge port 211, a soft connection 36 is arranged between the valve body 34 and the guide sleeve 32, the soft connection 36 is made of an airtight material, the upper part of the annular wall of the negative pressure cylinder 31 is provided with a vent hole, the vent hole is provided with a vent valve 37, the upper part of the annular wall of the negative pressure cylinder 31 is provided with a negative pressure port, the negative pressure port, the sealing cover 38 covers the secondary discharge opening 311, and the sealing cover 38 is fixed to the negative pressure cylinder 31 by the pressing member 39.
The existing discharge valve of the rake dryer 20 adopts a worm gear to realize the close fit of a valve core and a valve seat, so that the sealing effect is achieved, the sealing stress of the discharge valve with the structure is uneven, the sealing effect is influenced, and the sealing effect is also influenced by the adhesion of some materials on the conical surface of the valve core.
In this embodiment, after the material in the rake dryer 20 is unloaded, because of the effect of the vacuum pump, the air current in the rake dryer 20 flows out from the gap between the valve body 34 and the primary discharge opening 211, along with the distance between the valve body 34 and the primary discharge opening 211 is reduced, the air current flow rate that the rake dryer 20 flows into the negative pressure cylinder 31 is increased, the material on the sealing surface of the adhesion and the valve body 34 receives the gradually-increased force, the material on the sealing surface of the adhesion and the valve body 34 moves, thereby the effect of cleaning the sealing surface of the valve body 34 is achieved, and the sealing effect of the valve body 34 is improved.
In this embodiment, when the sealing surface of the valve body 34 is poorly sealed, the negative pressure cylinder 31 serves as a secondary seal.
In this embodiment, a gap exists between the guide rod 33 and the guide sleeve 32, so that the sealing effect of the negative pressure cylinder 31 is poor, and in a conventional method, a filler is sleeved between the guide rod 33 and the guide sleeve 32, and the sealing method not only causes the structure of the equipment to be complicated, but also has high failure rate at a dynamic and static joint, and increases the maintenance cost of the equipment.
In the embodiment, the guide rod 33 linearly moves up and down in the guide sleeve 32, and the guide rod 33 is positioned at the center of the valve body 34, so that the problem of uneven stress on the sealing surface of the valve body 34 is solved; the soft connection 36 made of the air-tight material solves the sealing of the negative pressure cylinder 31, the soft connection 36 can be unfolded and folded along with the valve body 34, the sealing problem is solved, the failure rate of equipment is reduced, the material at the sealing surface of the valve body 34 can be automatically removed by adopting the method of connecting a vacuum pump for negative pressure discharging, and the sealing performance of the valve body 34 is improved.
Referring to fig. 1 to 6, further, the pressing assembly 39 includes a fixing ring 391, a movable ear ring 392 and a tightening bolt 393, the fixing ring 391 is fixedly connected with the negative pressure cylinder 31, the movable ear ring 392 is L-shaped, the movable ear ring 392 includes a vertical section and a horizontal section, the vertical section is rotatably connected with the fixing ring 391, a threaded hole in threaded connection with the tightening bolt 393 is arranged on the horizontal section, and the tightening bolt 393 rotates clockwise or counterclockwise to relatively fix or loosen the sealing cover 38 and the negative pressure cylinder 31.
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 for recovering methanol by using the vacuum pump further comprises a controller and a temperature sensor, wherein 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 value is preset in the controller, the real-time temperature is greater than or equal to the temperature threshold value, the controller controls the first pneumatic valve 111 to be closed, the second pneumatic valve 141 to be opened, the real-time temperature is less than the temperature threshold value, 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, utilize solid-state sodium methoxide alkaline process apparatus for producing of vacuum pump recovery methyl alcohol still includes humidity transducer, and temperature sensor is used for detecting the real-time water content of the interior methanol liquor 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 (6)
1. The utility model provides an utilize solid-state sodium methoxide alkaline process apparatus for producing of vacuum pump recovery methyl alcohol which characterized in that: including sodium methoxide synthesis unit, rake dryer, methyl alcohol negative pressure recovery unit, sodium methoxide synthesis unit includes first preheater, converter, rectifying column, multistage cooling unit, second preheater, converter left side upper portion has a raw materials entry, and alcohol lye gets into the shell side of first preheater, adds the converter through raw materials entry after first preheater heats, the converter 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 converter and the pipeline connection for the gaseous phase entry of rectifying column to make the gaseous mixture of methyl alcohol and water in the converter send into the rectifying column, rectifying column top has a gaseous phase export, and the gaseous phase export of rectifying column and the tube side 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 cooling outlet of the multistage cooling unit, a liquid phase outlet at the bottom of the synthesis box 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 rake dryer comprises a barrel, a rotating shaft and a knocking assembly, the left end and the right end of the rotating shaft are respectively rotatably connected with end surfaces at two ends of the barrel, the knocking assembly comprises a fixed rod, a knocking rod, a first blocking block and a second blocking block, the fixed rod is vertically arranged relative to the rotating shaft, one end of the fixed rod is a connecting end, the connecting end of the fixed rod is fixedly connected with the rotating shaft, the other end of the fixed rod is a free end, one end of the knocking rod is a connecting end, the connecting end of the knocking rod, the fixed rod is provided with a first blocking block and a second blocking block, the first blocking block is arranged close to the free end of the fixed rod, the second blocking block is arranged close to the connecting end of the fixed rod, the included angle between the knocking rod and the fixed rod is 180 degrees, the first blocking block prevents the knocking rod from rotating anticlockwise, the included angle between the knocking rod and the fixed rod is 0 degree, the second blocking block prevents the knocking rod from rotating clockwise, the methanol negative pressure recovery device comprises a cooling tower and a first vacuum pump, a gas phase inlet at the bottom of the cooling tower is connected with a gas phase outlet of a cylinder body of the rake dryer so that methanol gas volatilized from the rake dryer enters the cooling tower, an inlet of the first vacuum pump is connected with a top emptying port of the cooling tower so as to provide pumping force for the methanol gas to enter the cooling tower, the cooling tower comprises a tower body and guide sieve plates which are staggered from top to bottom, and the tower body is of a sandwich, the cooling medium circulates in the interlayer of the tower body, the guide sieve plate is horizontally arranged in the tower body, one end of the guide sieve plate is connected with the inner wall of the tower body, the other end of the guide sieve plate is not connected with the inner wall of the tower body, and the end, which is not connected with the tower body, of the guide sieve plate is bent upwards.
2. The apparatus for producing solid sodium methoxide by alkaline process with vacuum pump for recovery of methanol as claimed in claim 1, wherein: the solid sodium methoxide alkaline process production device for recovering methanol by using the vacuum pump further comprises a negative pressure discharge device, a discharge opening is formed in the bottom of the barrel of the rake dryer, the cross section of the discharge opening is trapezoidal, the negative pressure discharge device comprises a negative pressure barrel, a guide sleeve, a guide rod, a valve body, a hand wheel, a flexible connection, a vent valve, a second vacuum pump, a sealing cover and a pressing assembly, the upper end of the negative pressure barrel is open, the lower end of the negative pressure barrel is closed, a secondary discharge opening is formed in the end face of the closed end of the negative pressure barrel, the end face of the upper end of the negative pressure barrel is tightly attached to the outer side bottom wall of the barrel of the rake dryer, the inner cavity of the barrel of the rake dryer is communicated with the inner cavity of the negative pressure barrel through the discharge opening, the lower end of the guide sleeve is fixedly connected with the inner side bottom wall of the, the upper end of the guide rod is provided with a valve body, the lower end of the guide rod is provided with a hand wheel, the central line of the guide hole, the central line of the guide rod and the central line of the valve body are all superposed with the central line of the primary discharge opening, the shape of the valve body is matched with the cavity of the primary discharge opening, the guide rod is driven to rotate by rotating the hand wheel, the guide rod moves upwards or downwards relative to the guide sleeve to cover or open the primary discharge opening, the valve body is flexibly connected with the guide sleeve, the soft connection is made of air-tight material, the upper part of the annular wall of the negative pressure cylinder is provided with an air vent, the air vent is provided with an air release valve, the upper part of the annular wall of the negative pressure cylinder is provided with a negative pressure port which is connected with an inlet of a second vacuum pump, at least two pressing components are arranged, the pressing assemblies are uniformly distributed along the annular wall of the negative pressure cylinder, the sealing covers cover the secondary discharge opening, and the sealing covers and the negative pressure cylinder are relatively fixed through the pressing assemblies.
3. The apparatus for producing solid sodium methoxide by alkaline process with vacuum pump for recovery of methanol as claimed in claim 2, wherein: compress tightly the subassembly including solid fixed ring, activity earrings, puller bolt, solid fixed ring and negative pressure section of thick bamboo fixed connection, the activity earrings becomes L shape, and the activity earrings includes vertical section, horizontal segment, and vertical section rotates with solid fixed ring to be connected, is equipped with on the horizontal segment with puller bolt threaded connection's screw hole, puller bolt dextrorotation or levogyration to with sealed lid and negative pressure section of thick bamboo relatively fixed or loosen.
4. The apparatus for producing solid sodium methoxide by alkaline process with vacuum pump for recovery of methanol 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.
5. The apparatus for producing solid sodium methoxide by alkaline process with vacuum pump for recovery of methanol as claimed in claim 1, wherein: utilize solid-state sodium methoxide alkaline process apparatus for producing of vacuum pump recovery methyl alcohol 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.
6. The apparatus for producing solid sodium methoxide by alkaline process with vacuum pump for recovery of methanol as claimed in claim 5, wherein: utilize solid-state sodium methoxide alkaline process apparatus for producing of vacuum pump recovery methyl alcohol 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 and opens, and the fourth pneumatic valve closes.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201920407371.XU CN209741030U (en) | 2019-03-28 | 2019-03-28 | Solid sodium methoxide alkaline production device for recovering methanol by vacuum pump |
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|---|---|---|---|
| CN201920407371.XU CN209741030U (en) | 2019-03-28 | 2019-03-28 | Solid sodium methoxide alkaline production device for recovering methanol by vacuum pump |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109836309A (en) * | 2019-03-28 | 2019-06-04 | 宁夏恒汇鲁丰科技有限公司 | Utilize the solid-state methanol sodium alkali process units of vacuum pump recycling methanol |
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2019
- 2019-03-28 CN CN201920407371.XU patent/CN209741030U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109836309A (en) * | 2019-03-28 | 2019-06-04 | 宁夏恒汇鲁丰科技有限公司 | Utilize the solid-state methanol sodium alkali process units of vacuum pump recycling methanol |
| CN109836309B (en) * | 2019-03-28 | 2024-07-19 | 宁夏恒汇鲁丰科技有限公司 | Solid sodium methoxide alkaline process production device for recycling methanol by utilizing vacuum pump |
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Denomination of utility model: Solid sodium methoxide alkali production unit for recovering methanol by vacuum pump Effective date of registration: 20211109 Granted publication date: 20191206 Pledgee: Bank of Ningxia Co.,Ltd. Yanchi sub branch Pledgor: NINGXIA HENGHUI LUFENG TECHNOLOGY Co.,Ltd. Registration number: Y2021980012108 |
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Date of cancellation: 20220704 Granted publication date: 20191206 Pledgee: Bank of Ningxia Co.,Ltd. Yanchi sub branch Pledgor: NINGXIA HENGHUI LUFENG TECHNOLOGY Co.,Ltd. Registration number: Y2021980012108 |
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Denomination of utility model: Solid sodium methoxide alkali production unit using vacuum pump to recover methanol Effective date of registration: 20220706 Granted publication date: 20191206 Pledgee: Ningxia East Guarantee Co.,Ltd. Pledgor: NINGXIA HENGHUI LUFENG TECHNOLOGY Co.,Ltd. Registration number: Y2022640000012 |
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Date of cancellation: 20230625 Granted publication date: 20191206 Pledgee: Ningxia East Guarantee Co.,Ltd. Pledgor: NINGXIA HENGHUI LUFENG TECHNOLOGY Co.,Ltd. Registration number: Y2022640000012 |
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Denomination of utility model: Solid Sodium methoxide alkali production unit using vacuum pump to recover methanol Effective date of registration: 20230713 Granted publication date: 20191206 Pledgee: Ningxia East Guarantee Co.,Ltd. Pledgor: NINGXIA HENGHUI LUFENG TECHNOLOGY Co.,Ltd. Registration number: Y2023640000022 |
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