CN112691633A - Equipment and method for producing ethylenediamine tetraacetic acid by using hydrocyanic acid and ethylenediamine as raw materials - Google Patents
Equipment and method for producing ethylenediamine tetraacetic acid by using hydrocyanic acid and ethylenediamine as raw materials Download PDFInfo
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- CN112691633A CN112691633A CN202110114830.7A CN202110114830A CN112691633A CN 112691633 A CN112691633 A CN 112691633A CN 202110114830 A CN202110114830 A CN 202110114830A CN 112691633 A CN112691633 A CN 112691633A
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J19/00—Chemical, physical or physico-chemical processes in general; Their relevant apparatus
- B01J19/18—Stationary reactors having moving elements inside
- B01J19/1868—Stationary reactors having moving elements inside resulting in a loop-type movement
- B01J19/1881—Stationary reactors having moving elements inside resulting in a loop-type movement externally, i.e. the mixture leaving the vessel and subsequently re-entering it
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J19/00—Chemical, physical or physico-chemical processes in general; Their relevant apparatus
- B01J19/0053—Details of the reactor
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J19/00—Chemical, physical or physico-chemical processes in general; Their relevant apparatus
- B01J19/0053—Details of the reactor
- B01J19/0066—Stirrers
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J19/00—Chemical, physical or physico-chemical processes in general; Their relevant apparatus
- B01J19/18—Stationary reactors having moving elements inside
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- C—CHEMISTRY; METALLURGY
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- C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
- C07C227/00—Preparation of compounds containing amino and carboxyl groups bound to the same carbon skeleton
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Abstract
The invention discloses equipment for producing ethylene diamine tetraacetic acid by using hydrocyanic acid and ethylenediamine as raw materials, which comprises a reaction kettle, wherein the upper end of one side of the reaction kettle is provided with a feeding pipe, the upper end of the reaction kettle is fixedly connected with a motor and a water pump, the upper end of the reaction kettle is provided with a rotating pipe in a penetrating manner, the rotating pipe is rotatably connected with the reaction kettle, and a transmission mechanism is arranged among the rotating pipe, the motor and the water pump; the invention also discloses a mixing method for producing ethylenediamine tetraacetic acid by using hydrocyanic acid and ethylenediamine as raw materials, which comprises the following steps: s1, firstly, adding formaldehyde and ammonia water into the reaction kettle, and then starting the motor. According to the invention, the pumping circulating mixing of the mixed liquid can be realized through one motor, and meanwhile, the horizontal and longitudinal three-dimensional stirring of the mixed liquid can be realized, so that the mixing efficiency of formaldehyde and ammonia water is greatly improved, the full reaction can be realized, the rotation of the spiral blades can be realized, the mixed liquid can be surged upwards, and the full mixing reaction can be further realized.
Description
Technical Field
The invention relates to the technical field of ethylenediamine, in particular to equipment and a method for producing ethylenediamine tetraacetic acid by using hydrocyanic acid and ethylenediamine as raw materials.
Background
A method for producing ethylenediamine tetraacetic acid and salts. The process comprises the following steps: 1) adding a formaldehyde flow into a reaction kettle, and fully mixing and reacting with ethylenediamine in the kettle to synthesize aldehyde-amine mixed solution; 2) introducing hydrocyanic acid synthesis gas, and reacting with aldehyde-amine mixed solution to generate an intermediate product, namely ethylenediamine diacetonitrile; 3) simultaneously adding formaldehyde and acid into the kettle, and introducing hydrocyanic acid synthetic gas to generate ethylene diamine tetraacetic acid acetonitrile; 4) carrying out hydrolysis reaction on ethylene diamine tetraacetic acid with alkaline aqueous solution or acid solution to obtain ethylene diamine tetraacetic acid salt, adding acid, adjusting pH to be 1-5 by acidification, and obtaining ethylene diamine tetraacetic acid and ethylene diamine tetraacetic acid salt: the product produced by the method has stable quality, greatly improved reaction yield, reduced production cost, safer production operation and environmental protection.
The first step of the process is to fully mix formaldehyde and ammonia water for reaction to form a mixed solution, while the existing reaction kettle is provided with a stirring mechanism, but the stirring mechanism is simple and cannot rapidly mix the formaldehyde and the ammonia water, so that the mixing reaction efficiency is reduced, and the quality of the mixed solution is possibly reduced.
Disclosure of Invention
The invention aims to solve the defects in the prior art, and provides equipment and a method for producing ethylenediamine tetraacetic acid by using hydrocyanic acid and ethylenediamine as raw materials.
In order to achieve the purpose, the invention adopts the following technical scheme:
with hydrocyanic acid and ethylenediamine raw materials production ethylene diamine tetraacetic acid's equipment, including reation kettle, the filling tube is installed to one side upper end of reation kettle, reation kettle's upper end fixedly connected with motor and water pump, reation kettle's upper end is run through and is equipped with rather than the rotation tube of rotating the connection, be equipped with drive mechanism between rotation tube, motor and the water pump, just be equipped with circulation mechanism between water pump, reation kettle and the rotation tube, the cover is equipped with rather than the U template of rotating the connection on the rotation tube, the U template is connected with reation kettle's inner wall through two locating parts, the bottom of U template is rotated and is connected with first bevel gear, the rotation tube runs through first bevel gear and rather than fixed connection, be equipped with two second bevel gears in the U template, two the second bevel gear all meshes with first bevel gear, two all run through being equipped with rather than fixed connection's connecting pipe on the second bevel gear, two the connecting pipe all runs through the U template and rotates rather than being connected, two equal fixedly connected with rather than a plurality of nozzle stub that are linked together on the connecting pipe, two the equal fixedly connected with of one end that the connecting pipe is relative links up the pipe, two it all rotates with the outer wall of rotating tube to link up the pipe and communicates with the rotating tube, the outer wall cover of rotating tube is equipped with rather than sliding connection's sleeve pipe, a plurality of puddlers of sheathed tube outer wall fixedly connected with, reciprocating mechanism about being equipped with between sleeve pipe and the reation kettle.
Preferably, drive mechanism is including the double sheave of cover on the rotating tube and rather than fixed connection, the output fixedly connected with dwang of motor, the first drive wheel of upper end fixedly connected with of dwang, be connected through first belt between first drive wheel and the double sheave, the axle head fixedly connected with secondary drive wheel of water pump, be connected through the second belt between secondary drive wheel and the double sheave.
Preferably, circulation mechanism include with the water pump go out water end fixed connection's first conveyer pipe, the other end fixed connection of first conveyer pipe has rotary joint, rotary joint's the other end and the upper end fixed connection of rotating-tube, the water inlet end fixed connection of water pump has the second conveyer pipe, the other end of second conveyer pipe runs through reation kettle's one side lower extreme and rather than fixed connection, install manual valve on the second conveyer pipe.
Preferably, the locating part includes the L template of fixing on the U template, the ball is installed to the other end of L template, the ball offsets with reation kettle's inner wall.
Preferably, upper and lower canceling release mechanical system is including fixing the base of bottom in the reation kettle, the reciprocal lead screw of fixedly connected with on the base, the upper end of reciprocal lead screw extends to sheathed tube inside and is connected rather than the cooperation, the outer wall fixed rotation of reciprocal lead screw is connected with the annular piece, two first risers of upper end fixedly connected with of annular piece, two equal sliding connection has the second riser in the first riser, two the upper end of second riser all with sheathed tube bottom fixed connection, a plurality of spiral leaves of outer wall fixedly connected with of annular piece.
The invention also discloses a mixing method for producing ethylenediamine tetraacetic acid by using hydrocyanic acid and ethylenediamine as raw materials, which comprises the following steps:
s1, firstly, adding formaldehyde and ammonia water into a reaction kettle, and then starting a motor;
s2, the motor rotates to drive the rotating rod, the first driving wheel, the double grooved wheel and the second driving wheel to rotate, so that the rotation of the rotating pipe and the work of the water pump can be realized;
s3, the rotating pipe works to drive the first bevel gear, the second bevel gear, the sleeve and the stirring rod to rotate, the aldehyde-ammonia mixed liquid can be transversely mixed and stirred through the stirring rod, meanwhile, the connecting pipe and the short pipe can longitudinally mix and stir the aldehyde-ammonia mixed liquid, and three-dimensional mixing and stirring are achieved, so that the mixing reaction is more sufficient;
s4, the sleeve pipe is matched with the reciprocating screw rod, so that the reciprocating screw rod can rotate and move up and down in a reciprocating mode, and the spiral blades can rotate to surge the mixed liquid upwards, so that the aldehyde-ammonia mixed liquid can be mixed more fully;
and S5, the water pump works to convey the mixed liquid to the short pipe through the second conveying pipe, the first conveying pipe, the rotary joint and the rotating pipe, and finally the mixed liquid is sprayed out and mixed again.
Compared with the prior art, the invention has the beneficial effects that:
the motor works to drive the rotating rod, the first driving wheel, the double grooved wheels and the second driving wheel to rotate, so that the rotation of the rotating pipe and the work of the water pump can be realized, the rotating pipe rotates to drive the first bevel gear, the second bevel gear, the sleeve and the stirring rod to rotate, the aldehyde-ammonia mixed liquid can be transversely mixed and stirred through the stirring rod, meanwhile, the connecting pipe and the short pipe can longitudinally mix and stir the aldehyde-ammonia mixed liquid, and the three-dimensional mixing and stirring are realized, so that the mixing reaction of the aldehyde-ammonia mixed liquid is more sufficient;
meanwhile, the U-shaped plate cannot rotate under the limit of the L-shaped plate, so that when the rotating pipe drives the sleeve to rotate, the sleeve can move up and down in a reciprocating mode while rotating through the matching of the rotating pipe and the reciprocating screw rod, the annular block can rotate under the driving of the first vertical pipe and the second vertical pipe, the rotation of the spiral blades can be realized, the mixed liquid can be upwards surged through the rotation of the spiral blades, and the filling degree of the mixed liquid mixing reaction can be increased again;
simultaneously, the water pump work can be carried the mixed liquid to the nozzle stub through second conveyer pipe, first conveyer pipe, rotary joint, rotating tube in, and final blowout mixes once more, and then the effect that the improvement that can be once more mixes makes its reaction more abundant.
In conclusion, the invention can realize pumping circulation mixing of the mixed liquid through one motor, can realize horizontal and vertical three-dimensional stirring of the mixed liquid, greatly improves the mixing efficiency of formaldehyde and ammonia water, can enable the formaldehyde and the ammonia water to fully react, can realize rotation of the spiral blade, and can upwards surge the mixed liquid so as to fully mix and react.
Drawings
FIG. 1 is a schematic structural diagram of an apparatus for producing ethylenediaminetetraacetic acid from hydrocyanic acid and ethylenediamine according to the present invention;
FIG. 2 is a schematic diagram of a double sheave in an apparatus for producing ethylenediaminetetraacetic acid from hydrocyanic acid and ethylenediamine according to the present invention;
FIG. 3 is a bottom view of the casing of the apparatus for producing ethylenediaminetetraacetic acid from hydrocyanic acid and ethylenediamine according to the present invention;
FIG. 4 is a schematic diagram of a part of the structure of an apparatus for producing ethylenediaminetetraacetic acid from hydrocyanic acid and ethylenediamine.
In the figure: the device comprises a reaction kettle 1, a motor 2, a rotating rod 3, a first transmission wheel 4, a first belt 5, a double-grooved wheel 6, a rotating pipe 7, a second belt 8, a rotating joint 9, a first transmission pipe 10, a second transmission wheel 11, a water pump 12, a second transmission pipe 13, a feed pipe 14, a U-shaped plate 15, a first bevel gear 16, a L-shaped plate 17, a ball 18, a connecting pipe 19, a short pipe 20, a sleeve 21, a stirring rod 22, a second vertical pipe 23, a first vertical pipe 24, an annular block 25, a reciprocating screw rod 26, a manual screw blade 27, a base 28, a 29 valve 30, a second bevel gear 31 and a connecting pipe.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments.
Referring to fig. 1-4, the apparatus for producing ethylenediaminetetraacetic acid from hydrocyanic acid and ethylenediamine raw material comprises a reaction kettle 1, a feeding pipe 14 is installed at the upper end of one side of the reaction kettle 1, a motor 2 and a water pump 12 are fixedly connected to the upper end of the reaction kettle 1, a rotating pipe 7 connected with the reaction kettle 1 in a rotating manner is arranged at the upper end of the reaction kettle 1 in a penetrating manner, the rotating pipe 7 is made of stainless steel, the rotating pipe 7 positioned at the upper end of the reaction kettle 1 is circular, and the rotating pipe 7 in the reaction kettle 1 is square.
A transmission mechanism is arranged between the rotating pipe 7, the motor 2 and the water pump 12, the transmission mechanism comprises a double-grooved pulley 6 which is sleeved on the rotating pipe 7 and is fixedly connected with the rotating pipe, the output end of the motor 2 is fixedly connected with a rotating rod 3, the upper end of the rotating rod 3 is fixedly connected with a first transmission wheel 4, the first transmission wheel 4 is connected with the double-grooved pulley 6 through a first belt 5, the shaft end of the water pump 12 is fixedly connected with a second transmission wheel 11, the second transmission wheel 11 is connected with the double-grooved pulley 6 through a second belt 8, and therefore the rotation of the rotating pipe 7 and the work of the water pump 12 can be achieved through the motor 2.
A circulating mechanism is arranged among the water pump 12, the reaction kettle 1 and the rotating pipe 7, the circulating mechanism comprises a first conveying pipe 10 fixedly connected with the water outlet end of the water pump 12, the other end of the first conveying pipe 10 is fixedly connected with a rotating joint 9, the other end of the rotating joint 9 is fixedly connected with the upper end of the rotating pipe 7, the water inlet end of the water pump 12 is fixedly connected with a second conveying pipe 13, the other end of the second conveying pipe 13 penetrates through the lower end of one side of the reaction kettle 1 and is fixedly connected with the lower end of one side of the reaction kettle 1, and a manual valve 29 is arranged on the second; wherein, water pump 12 work can be carried the mixed liquid in reation kettle 1 to rotating-tube 7 through second conveyer pipe 13, first conveyer pipe 10 and rotary joint 9.
The rotating pipe 7 is sleeved with a U-shaped plate 15 which is rotatably connected with the rotating pipe, the U-shaped plate 15 is connected with the inner wall of the reaction kettle 1 through two limiting parts, each limiting part comprises an L-shaped plate 17 fixed on the U-shaped plate 15, the other end of each L-shaped plate 17 is provided with a ball 18, and the balls 18 are abutted against the inner wall of the reaction kettle 1; can guarantee through the locating part that U type 15 can only reciprocate in reation kettle 1, then can reduce through ball 18 with reation kettle 1 inner wall between the friction.
The bottom of U template 15 is rotated and is connected with first bevel gear 16, rotating tube 7 runs through first bevel gear 16 and rather than fixed connection, be equipped with two second bevel gears 30 in the U template 15, two second bevel gears 30 all mesh with first bevel gear 16, all run through on two second bevel gears 30 and be equipped with rather than fixed connection's connecting pipe 19, two connecting pipes 19 all run through U template 15 and rather than rotate and be connected, equal fixedly connected with rather than a plurality of nozzle stub 20 that are linked together on two connecting pipes 19, the equal fixedly connected with of one end that two connecting pipes 19 are relative links up pipe 31, two link up pipe 31 all rotate with the outer wall of rotating tube 7 and be connected and communicate with rotating tube 7.
The outer wall cover of live-tube 7 is equipped with rather than sliding connection's sleeve pipe 21, a plurality of puddlers 22 of the outer wall fixedly connected with of sleeve pipe 21, be equipped with reciprocating mechanism from top to bottom between sleeve pipe 21 and the reation kettle 1, upper and lower canceling release mechanical system is including fixing the base 28 of bottom in reation kettle 1, the reciprocal lead screw 26 of fixedly connected with on the base 28, the upper end of reciprocal lead screw 26 extends to sleeve pipe 21's inside and is connected rather than the cooperation, the outer wall fixed rotation of reciprocal lead screw 26 is connected with annular block 25, two first risers 24 of upper end fixedly connected with of annular block 25, equal sliding connection has second riser 23 in two first risers 24, the upper end of two second risers 23 all with sleeve pipe 21's bottom fixed connection, a plurality of helical blades 27 of outer wall fixedly connected with of annular block 25.
The invention also discloses a mixing method for producing ethylenediamine tetraacetic acid by using hydrocyanic acid and ethylenediamine as raw materials, which comprises the following steps:
s1, firstly, adding formaldehyde and ammonia water into a reaction kettle 1, and then starting a motor 2;
s2, the motor 2 rotates to drive the rotating rod 3, the first driving wheel 4, the double grooved wheel 6 and the second driving wheel 11 to rotate, so that the rotation of the rotating pipe 7 and the work of the water pump 12 can be realized;
s3, the rotating pipe 7 works to drive the first bevel gear 16, the second bevel gear 30, the sleeve 21 and the stirring rod 22 to rotate, the aldehyde-ammonia mixed liquid can be transversely mixed and stirred through the stirring rod 22, and meanwhile, the aldehyde-ammonia mixed liquid can be longitudinally mixed and stirred through the connecting pipe 19 and the short pipe 20, so that three-dimensional mixing and stirring are realized, and the mixing reaction is more sufficient;
s4, the sleeve 21 is matched with the reciprocating screw rod 26, so that the vertical reciprocating movement can be realized while the rotation is realized, and the mixed liquid can be surged upwards by the rotation of the spiral blade 27, so that the aldehyde-ammonia mixed liquid can be more fully mixed;
s5, the water pump 12 is operated to feed the mixture to the short pipe 20 through the second feed pipe 13, the first feed pipe 10, the rotary joint 9 and the rotary pipe 7, and finally, the mixture is discharged and mixed again.
The method comprises the following specific steps:
adding formaldehyde and ammonia water into a reaction kettle 1 through a feeding pipe 14, starting a motor 2, and driving a rotating rod 3, a first driving wheel 4, a double-grooved wheel 6 and a second driving wheel 11 to rotate by the motor 2, so that the rotation of a rotating pipe 7 and the work of a water pump 12 can be realized;
the rotating pipe 7 rotates to drive the first bevel gear 16, the second bevel gear 30, the sleeve 21 and the stirring rod 22 to rotate, the aldehyde-ammonia mixed liquor can be transversely mixed and stirred through the stirring rod 22, meanwhile, the aldehyde-ammonia mixed liquor can be longitudinally mixed and stirred through the connecting pipe 19 and the short pipe 20, three-dimensional mixing and stirring are achieved, and the mixing reaction is more sufficient;
meanwhile, the U-shaped plate 15 cannot rotate under the limit of the L-shaped plate 17, so that when the rotating pipe 7 drives the sleeve 21 to rotate, the sleeve 21 can move up and down in a reciprocating manner while rotating through the matching of the rotating pipe and the reciprocating screw rod 26, and the annular block 25 can rotate under the driving of the first vertical pipe 24 and the second vertical pipe 23, so that the rotation of the spiral blade 27 can be realized, the rotation of the spiral blade 27 can be used for surging the mixed liquid upwards, and the filling degree of the mixed liquid mixing reaction can be increased again;
meanwhile, the water pump 12 works, mixed liquid can be conveyed to the short pipe 20 through the second conveying pipe 13, the first conveying pipe 10, the rotary joint 9 and the rotating pipe 7, and finally sprayed out and mixed again, so that the effect of mixing can be improved again, and the reaction is more sufficient.
The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art should be considered to be within the technical scope of the present invention, and the technical solutions and the inventive concepts thereof according to the present invention should be equivalent or changed within the scope of the present invention.
Claims (6)
1. With hydrocyanic acid and ethylenediamine raw materials production ethylene diamine tetraacetic acid's equipment, including reation kettle (1), filling tube (14) are installed to one side upper end of reation kettle (1), its characterized in that, the upper end fixedly connected with motor (2) and water pump (12) of reation kettle (1), the upper end of reation kettle (1) is run through and is equipped with rather than rotating-tube (7) of being connected, be equipped with drive mechanism between rotating-tube (7), motor (2) and water pump (12), just be equipped with circulating mechanism between water pump (12), reation kettle (1) and rotating-tube (7), the cover is equipped with rather than the U template (15) of being connected of rotating on rotating-tube (7), U template (15) are connected with the inner wall of reation kettle (1) through two locating parts, the bottom rotation of U template (15) is connected with first bevel gear (16), the rotating pipe (7) penetrates through the first bevel gear (16) and is fixedly connected with the first bevel gear, two second bevel gears (30) are arranged in the U-shaped plate (15), the second bevel gears (30) are meshed with the first bevel gear (16), the second bevel gears (30) are provided with connecting pipes (19) fixedly connected with the second bevel gears, the connecting pipes (19) are connected with the U-shaped plate (15) in a penetrating manner and are rotatably connected with the first bevel gear, the connecting pipes (19) are fixedly connected with a plurality of short pipes (20) communicated with the connecting pipes, one ends of the connecting pipes (19) opposite to each other are fixedly connected with linking pipes (31), the linking pipes (31) are rotatably connected with the outer wall of the rotating pipe (7) and are communicated with the rotating pipe (7), the outer wall of the rotating pipe (7) is sleeved with a sleeve pipe (21) in a sliding connection with the rotating pipe, and the outer wall of the sleeve pipe (21) is fixedly connected with a plurality of stirring rods (, an up-down reciprocating mechanism is arranged between the sleeve (21) and the reaction kettle (1).
2. The apparatus for producing ethylenediaminetetraacetic acid from hydrocyanic acid and ethylenediamine as defined in claim 1, wherein the transmission mechanism comprises a double grooved pulley (6) sleeved on and fixedly connected with the rotating pipe (7), the output end of the motor (2) is fixedly connected with a rotating rod (3), the upper end of the rotating rod (3) is fixedly connected with a first transmission wheel (4), the first transmission wheel (4) is connected with the double grooved pulley (6) through a first belt (5), the shaft end of the water pump (12) is fixedly connected with a second transmission wheel (11), and the second transmission wheel (11) is connected with the double grooved pulley (6) through a second belt (8).
3. The apparatus for producing ethylenediaminetetraacetic acid from hydrocyanic acid and ethylenediamine as defined in claim 2, wherein said circulating mechanism comprises a first delivery pipe (10) fixedly connected to an outlet end of a water pump (12), a rotary joint (9) is fixedly connected to the other end of said first delivery pipe (10), the other end of said rotary joint (9) is fixedly connected to an upper end of a rotary pipe (7), a second delivery pipe (13) is fixedly connected to an inlet end of said water pump (12), the other end of said second delivery pipe (13) penetrates through and is fixedly connected to a lower end of one side of the reaction kettle (1), and a manual valve (29) is installed on said second delivery pipe (13).
4. The apparatus for producing ethylenediaminetetraacetic acid from hydrocyanic acid and ethylenediamine as defined in claim 1, wherein said limiting member comprises an L-shaped plate (17) fixed on a U-shaped plate (15), the other end of the L-shaped plate (17) is provided with a ball (18), and the ball (18) abuts against the inner wall of the reaction vessel (1).
5. The apparatus for producing ethylenediaminetetraacetic acid from hydrocyanic acid and ethylenediamine as defined in claim 1, wherein the upper and lower reset mechanism comprises a base (28) fixed at the bottom of the reaction kettle (1), a reciprocating screw rod (26) is fixedly connected to the base (28), the upper end of the reciprocating screw rod (26) extends to the inside of the sleeve (21) and is cooperatively connected with the sleeve, an annular block (25) is fixedly and rotatably connected to the outer wall of the reciprocating screw rod (26), two first standpipes (24) are fixedly connected to the upper end of the annular block (25), a second standpipe (23) is slidably connected to each of the two first standpipes (24), the upper ends of the two second standpipes (23) are fixedly connected to the bottom of the sleeve (21), and a plurality of spiral vanes (27) are fixedly connected to the outer wall of the annular block (25).
6. The mixing method for producing the ethylene diamine tetraacetic acid by using the hydrocyanic acid and the ethylenediamine as raw materials is characterized by comprising the following steps of:
s1, firstly, adding formaldehyde and ammonia water into a reaction kettle (1), and then starting a motor (2);
s2, the motor (2) rotates to drive the rotating rod (3), the first transmission wheel (4), the double grooved wheel (6) and the second transmission wheel (11) to rotate, so that the rotation of the rotating pipe (7) and the work of the water pump (12) can be realized;
s3, the rotating pipe (7) works to drive the first bevel gear (16), the second bevel gear (30), the sleeve (21) and the stirring rod (22) to rotate, the aldehyde-ammonia mixed liquid can be transversely mixed and stirred through the stirring rod (22), and meanwhile, the aldehyde-ammonia mixed liquid can be longitudinally mixed and stirred through the connecting pipe (19) and the short pipe (20), so that three-dimensional mixing and stirring are realized, and the mixing reaction is more sufficient;
s4, the sleeve (21) is matched with the reciprocating screw rod (26) to realize the up-and-down reciprocating movement while rotating, and the spiral blade (27) rotates to surge the mixed liquid upwards, so that the aldehyde-ammonia mixed liquid can be more fully mixed;
and S5, the water pump (12) works to convey the mixed liquid to the short pipe (20) through the second conveying pipe (13), the first conveying pipe (10), the rotary joint (9) and the rotating pipe (7), and finally the mixed liquid is sprayed out and mixed again.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202110114830.7A CN112691633A (en) | 2021-01-28 | 2021-01-28 | Equipment and method for producing ethylenediamine tetraacetic acid by using hydrocyanic acid and ethylenediamine as raw materials |
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| CN202110114830.7A CN112691633A (en) | 2021-01-28 | 2021-01-28 | Equipment and method for producing ethylenediamine tetraacetic acid by using hydrocyanic acid and ethylenediamine as raw materials |
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| CN113398812A (en) * | 2021-06-18 | 2021-09-17 | 山西贝特瑞新能源科技有限公司 | Continuous production machine and production method for silicon-carbon negative electrode material of lithium battery |
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