A high-purity formaldehyde ester extraction device

Abstract

The invention relates to the technical field of formaldehyde ester extraction devices, in particular to a high-purity formaldehyde ester extraction device, comprising a distillation tank, an upper end of which is connected to a conduit, a heat exchanger is arranged on the conduit, and one end of the conduit is connected to a separation device with an intermittent water supply function; a mixed gas obtained by distillation flows out through the conduit, and the mixed gas is cooled by the heat exchanger so that the mixed gas is liquefied into a solution and flows into a separation tank body along the conduit; a motor drives a stirring shaft to rotate, and water is injected into the separation tank body through a water supply mechanism; the stirring shaft drives a plurality of groups of stirring blades to rotate, and the rotating stirring blades cause the solution in the separation tank body to be continuously stirred, so that the solution can be fully mixed with water, thereby accelerating the mixing of water and ethanol solution; after the solution in the separation tank body is stratified, it is discharged through a manual valve, thereby achieving the extraction of formaldehyde ester.

Description

Technical Field

[0001] The invention relates to the technical field of formaldehyde ester extraction devices, in particular to a high-purity formaldehyde ester extraction device. Background Art

[0002] During the preparation process of methyleneaminoacetonitrile hydrochloride, a large amount of waste liquid is generated. The waste liquid is a mixed solution composed of formaldehyde, ethanol, water and other substances. Due to the large amount of waste liquid, directly discarding it is not only wasteful but also increases the preparation cost of methyleneaminoacetonitrile hydrochloride. Therefore, the formaldehyde in the waste liquid is extracted through an extraction device and sold as a by-product.

[0003] When the existing formaldehyde ester extraction device is in operation, waste liquid is distilled in a distillation tank to evaporate a mixed gas of formaldehyde ester and ethanol. The mixed gas is cooled and condensed in a heat exchanger to form a mixed solution. The formaldehyde ester ethanol solution flows into a separator through a conduit. Since ethanol is soluble in water and formaldehyde ester is insoluble in water, water is added to the separator to completely dissolve the ethanol in water, thereby separating the solution in the separator into layers and obtaining high-purity formaldehyde ester. Since ethanol cannot dissolve in water immediately after water is added to the separator, too much water cannot be added at one time. If too much water is added, the water cannot be fully mixed with the mixed solution. However, currently, water is directly added to the separator, so the efficiency of dissolving ethanol in water is slow, thereby reducing the extraction efficiency of the formaldehyde ester. Summary of the Invention

[0004] The object of the present invention is to provide a kind of highly purified formaldehyde ester extraction device, to solve the problem of raising in above-mentioned background technology.

[0005] To achieve the above object, the present invention provides the following technical solution: a high-purity formaldehyde ester extraction device, comprising a distillation tank, the upper end of which is connected to a conduit, a heat exchanger is provided on the conduit, and one end of the conduit is connected to a separation device with an intermittent water supply function;

[0006] The separation device includes a separation tank body, a stirring shaft is arranged in the separation tank body, several groups of stirring blades are arranged on the stirring shaft, a manual valve is arranged at the bottom of the separation tank body, one end of the stirring shaft is connected to the linkage mechanism, the linkage mechanism is connected to the water supply mechanism, a water storage tank is arranged on the water supply mechanism, the water storage tank is connected to the water inlet pipe, the linkage mechanism includes a small gear, the small gear meshes with the large gear, the middle part of the large gear is connected to shaft one, shaft two is arranged on the large gear, shaft two is located in rectangular hole one, rectangular hole one is located on the receiving rod, and the receiving rod is connected to the receiving mechanism.

[0007] Preferably, the receiving mechanism includes an L-shaped rod, a guide sleeve is provided on the L-shaped rod, one end of the L-shaped rod extends into rectangular hole 2, rectangular hole 2 is located on the rocker rod, the other end of the L-shaped rod is fixedly connected to the receiving rod, the guide sleeve has a built-in through hole, the through hole is slidably connected to the L-shaped rod, the guide sleeve is fixed on the water tank, and the other end of the L-shaped rod is slidably connected to rectangular hole 2.

[0008] Preferably, the water supply mechanism includes a water supply tank, a water outlet is provided on one side of the lower end of the water supply tank, a water inlet is provided on the upper end of the water supply tank, a disc is provided in the water supply tank, a rubber sleeve is provided on the disc, a water tank is provided on the outer ring of the disc, and the middle of the disc is connected to the rotating shaft.

[0009] Preferably, the water outlet is obliquely inserted into the separation tank body, the water inlet is fixedly connected to the water storage tank, two sets of bearings are set at both ends of the rotating shaft, and the bearings are embedded in the inner wall of the water tank.

[0010] Preferably, several groups of stirring blades are welded to the stirring shaft, a bearing is provided at one end of the stirring shaft, the bearing is embedded in the separation tank body, and one end of the conduit extends into the separation tank body.

[0011] Preferably, the middle part of the small gear is connected to the stirring shaft, a bearing is set at one end of the shaft, the bearing is embedded in the separation tank body, the second shaft is fixed on the side of the large gear that deviates from the axis, and the second shaft is slidably connected to the rectangular hole one.

[0012] Preferably, the rubber sleeve is adhered to the disc, and the disc and the rubber sleeve are rotatably connected to the inner cavity of the water tank, and one end of the rotating shaft is fixedly connected to the rocker arm.

[0013] Compared with the prior art, the present invention has the following beneficial effects:

[0014] 1. The mixed gas obtained by distillation flows out through the conduit, and the mixed gas is cooled by the heat exchanger, so that the mixed gas is liquefied into a solution and flows into the separation tank along the conduit. The motor drives the stirring shaft to rotate, and water is injected into the separation tank through the water supply mechanism. The stirring shaft drives several groups of stirring blades to rotate. The rotating stirring blades cause the solution in the separation tank to continuously turn over, so that the solution can be fully mixed with water, thereby accelerating the mixing of water and ethanol solution. After the solution in the separation tank is stratified, it is discharged through the manual valve to achieve the extraction of formaldehyde ester.

[0015] 2. The agitator shaft drives the large gear to rotate through the small gear, and the large gear drives shaft two to rotate. The rotating shaft two will slide along the rectangular hole one, so that shaft two drives the receiving rod. As shaft two keeps rotating, the receiving rod drives the L-shaped rod to move back and forth continuously along the guide sleeve. One end of the L-shaped rod that moves back and forth will slide along the rectangular hole two, so that one end of the L-shaped rod drives the rocker arm to flip back and forth continuously with the rotating shaft as the axis. At the same time, the rotating shaft drives the disc together with the rubber sleeve to rotate back and forth continuously along the inner cavity of the water supply tank. The water in the water storage tank flows into the water tank through the water inlet. As the disc rotates, the water tank rotates to the water outlet. The water quickly flows into the separation tank through the water outlet, and then the disc brings the water tank back to the water inlet to collect water, thereby realizing water supply to the separation tank.

[0016] 3. Secondly, on the one hand, the volume of the water tank is constant, so the amount of water injected each time is the same, thereby achieving equal injection of water into the separation tank body. On the other hand, through the setting of the linkage mechanism, indirect water supply to the separation tank body is achieved, so that water flows into the separation tank body intermittently, so that the equal amount of water flowing into the separation tank body can be fully mixed with the solution. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 Schematic diagram of the present invention.

[0018] Figure 2 It is a partial cross-sectional schematic diagram of the separation device of the present invention.

[0019] Figure 3 It is a schematic diagram of the linkage mechanism of the present invention.

[0020] Figure 4 It is a cross-sectional schematic diagram of the water supply mechanism, water storage tank and water inlet pipe assembly of the present invention.

[0021] Figure 5 This is a schematic diagram of the disc, rubber sleeve, and rotating shaft assembly of the present invention.

[0022] In the figure: 1. distillation tank; 2. conduit; 3. heat exchanger; 4. separation device; 401. separation tank body; 402. stirring shaft; 403. stirring blade; 404. manual valve; 405. linkage mechanism; 406. water supply mechanism; 407. water storage tank; 408. water inlet pipe; 4051. small gear; 4052. large gear; 4053. axis one; 4054. axis two; 4055. rectangular hole one; 4056. receiving rod; 4057. receiving mechanism; 71. L-shaped rod; 72. guide sleeve; 73. rectangular hole two; 74. rocker arm; 4061. water supply tank; 4062. water outlet; 4063. water inlet; 4064. disc; 4065. rubber sleeve; 4066. water tank; 4067. rotating shaft. DETAILED DESCRIPTION

[0023] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0024] See also Figures 1 to 5The present invention provides a technical solution: a high-purity formaldehyde ester extraction device, comprising a distillation tank 1, the upper end of the distillation tank 1 is connected to a conduit 2, a heat exchanger 3 is provided on the conduit 2, one end of the conduit 2 is connected to a separation device 4 with an intermittent water supply function, the separation device 4 comprises a separation tank body 401, a stirring shaft 402 is provided in the separation tank body 401, a plurality of stirring blades 403 are provided on the stirring shaft 402, a manual valve 404 is provided at the bottom of the separation tank body 401, one end of the stirring shaft 402 is connected to a linkage mechanism 405, the linkage mechanism 405 is connected to a water supply mechanism 406, a water storage tank 407 is provided on the water supply mechanism 406, the water storage tank 407 is connected to a water inlet pipe 408, a plurality of stirring blades 403 are welded on the stirring shaft 402, a bearing is provided at one end of the stirring shaft 402, and the shaft The housing is embedded in the separation tank body 401, and one end of the conduit 2 extends into the separation tank body 401, wherein the distillation tank 1 distills the waste liquid, and the mixed gas obtained by distillation flows out through the conduit 2, and the mixed gas is cooled by the heat exchanger 3, so that the mixed gas is liquefied into a solution and flows into the separation tank body 401 along the conduit 2. The motor drives the stirring shaft 402 to rotate, and water is injected into the separation tank body 401 through the water supply mechanism 406. The stirring shaft 402 drives several groups of stirring blades 403 to rotate. The rotating stirring blades 403 cause the solution in the separation tank body 401 to be continuously turned over, so that the solution can be fully mixed with water, thereby accelerating the mixing of water and ethanol solution. After the solution in the separation tank body 401 is stratified, it is discharged through the manual valve 404, thereby realizing the extraction of formaldehyde ester.

[0025] The linkage mechanism 405 includes a small gear 4051, which meshes with a large gear 4052. The middle of the large gear 4052 is connected to the first shaft 4053. The large gear 4052 is provided with a second shaft 4054. The second shaft 4054 is located in the rectangular hole 1 4055. The rectangular hole 1 4055 is located on the receiving rod 4056. The receiving rod 4056 is connected to the receiving mechanism 4057. The receiving mechanism 4057 includes an L-shaped rod 71. A guide sleeve 72 is provided on the L-shaped rod 71. One end of the L-shaped rod 71 extends into the second rectangular hole 73. The second rectangular hole 73 is located on the rocker arm 74. The other end of the L-shaped rod 71 is fixedly connected to the receiving rod 4056. The guide sleeve 72 has a built-in through hole. The through hole is slidably connected to the L-shaped rod 71. The guide sleeve 72 is fixed to the water tank 4061. 1 The other end is slidably connected to the rectangular hole 2 73. The water supply mechanism 406 includes a water supply tank 4061. A water outlet 4062 is provided on one side of the lower end of the water supply tank 4061. A water inlet 4063 is provided on the upper end of the water supply tank 4061. A disc 4064 is provided in the water supply tank 4061. A rubber sleeve 4065 is provided on the disc 4064. A water storage tank 4066 is provided on the outer ring of the disc 4064. The middle of the disc 4064 is connected to the rotating shaft 4067. The water outlet 4062 is obliquely inserted into the separation tank body 401. The water inlet 4063 is fixedly connected to the water storage tank 407. Two sets of bearings are provided at both ends of the rotating shaft 4067. The bearings are embedded in the inner wall of the water supply tank 4061. The middle of the small gear 4051 is connected to the stirring shaft 402. A bearing is provided at one end of the shaft 1 4053. The bearing is embedded in the separation tank body. 401, shaft 2 4054 is fixed on the side of the large gear 4052 that deviates from the axis center, shaft 2 4054 is slidably connected to rectangular hole 1 4055, rubber sleeve 4065 is adhered to disc 4064, disc 4064 and rubber sleeve 4065 are rotated to connect to the inner cavity of water tank 4061, one end of rotating shaft 4067 is fixedly connected to rocker arm 74, wherein when stirring shaft 402 rotates, stirring shaft 402 drives large gear 4052 to rotate through small gear 4051, and large gear 4052 drives shaft 2 4054 to rotate, and rotating shaft 2 4054 will slide along rectangular hole 1 4055, so that shaft 2 4054 drives receiving rod 4056, as shaft 2 4054 keeps rotating, receiving rod 4056 drives L-shaped rod 71 to move back and forth continuously along guide sleeve 72. The L-shaped rod 71 moves back and forth, and one end thereof slides along the second rectangular hole 73, so that the L-shaped rod 71 drives the rocking rod 74 to turn back and forth continuously with the rotating shaft 4067 as the axis. At the same time, the rotating shaft 4067 drives the disc 4064 and the rubber sleeve 4065 to rotate back and forth continuously along the inner cavity of the water supply tank 4061. The water in the water storage tank 407 flows into the water tank 4066 through the water inlet 4063. As the disc 4064 rotates, the water tank 4066 rotates to the water outlet 4062. The water quickly flows into the separation tank body 401 through the water outlet 4062, and then the disc 4064 brings the water tank 4066 back to the water inlet 4063 to collect water, thereby realizing the water supply to the separation tank body 401. Secondly, on the one hand, the volume of the water tank 4066 is constant.Therefore, the amount of water injected each time is the same, thereby achieving equal injection of water into the separation tank 401. On the other hand, through the setting of the linkage mechanism 405, indirect water supply to the separation tank 401 is achieved, so that water flows into the separation tank 401 intermittently, so that the water flowing into the separation tank 401 in equal amounts can be fully mixed with the solution.

[0026] Working principle: The motor drives the stirring shaft 402 to rotate, and the stirring shaft 402 drives several groups of stirring blades 403 to rotate. The rotating stirring blades 403 cause the solution in the separation tank 401 to be continuously turned over. The stirring shaft 402 drives the large gear 4052 to rotate through the small gear 4051, and the large gear 4052 drives the second shaft 4054 to rotate. The rotating second shaft 4054 will slide along the rectangular hole 1 4055, so that the second shaft 4054 drives the receiving rod 4056. As the second shaft 4054 keeps rotating, the receiving rod 4056 drives the L-shaped rod 71 to move back and forth along the guide sleeve 72. One end of the L-shaped rod 71 that moves back and forth will slide along the rectangular hole 1 The second L-shaped hole 73 slides, causing one end of the L-shaped rod 71 to drive the rocking rod 74 to continuously flip back and forth with the rotating shaft 4067 as the axis. At the same time, the rotating shaft 4067 drives the disc 4064 and the rubber sleeve 4065 to rotate back and forth along the inner cavity of the water supply tank 4061. The water in the water storage tank 407 flows into the water tank 4066 through the water inlet 4063. As the disc 4064 rotates, the water tank 4066 rotates to the water outlet 4062, and the water quickly flows into the separation tank body 401 through the water outlet 4062. Then the disc 4064 brings the water tank 4066 back to the water inlet 4063 to collect water, thereby realizing water supply to the separation tank body 401.

[0027] While embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions, and variations may be made to these embodiments without departing from the principles and spirit of the invention, and that the scope of the invention is defined by the appended claims and their equivalents.

Claims

1. A high-purity formaldehyde ester extraction device, comprising a distillation tank (1), the upper end of the distillation tank (1) is connected to a conduit (2), and a heat exchanger (3) is provided on the conduit (2), characterized in that: One end of the conduit (2) is connected to a separation device (4) having an intermittent water supply function; The separation device (4) comprises a separation tank body (401), a stirring shaft (402) is provided in the separation tank body (401), a plurality of stirring blades (403) are provided on the stirring shaft (402), a manual valve (404) is provided at the bottom of the separation tank body (401), one end of the stirring shaft (402) is connected to a linkage mechanism (405), the linkage mechanism (405) is connected to a water supply mechanism (406), a water storage tank (407) is provided on the water supply mechanism (406), and the water storage tank (407) Connected to the water inlet pipe (408), the linkage mechanism (405) includes a small gear (4051), the small gear (4051) meshes with a large gear (4052), the middle of the large gear (4052) is connected to the first shaft (4053), the large gear (4052) is provided with a second shaft (4054), the second shaft (4054) is located in the first rectangular hole (4055), the first rectangular hole (4055) is located on the receiving rod (4056), and the receiving rod (4056) is connected to the receiving mechanism (4057); The receiving mechanism (4057) includes an L-shaped rod (71), a guide sleeve (72) is provided on the L-shaped rod (71), one end of the L-shaped rod (71) extends into the second rectangular hole (73), the second rectangular hole (73) is located on the swing rod (74), the other end of the L-shaped rod (71) is fixedly connected to the receiving rod (4056), the guide sleeve (72) has a built-in through hole, the through hole is slidably connected to the L-shaped rod (71), the guide sleeve (72) is fixed on the water supply tank (4061), and the other end of the L-shaped rod (71) is slidably connected to the second rectangular hole (73); The water supply mechanism (406) comprises a water supply tank (4061), a water outlet (4062) being provided at one side of the lower end of the water supply tank (4061), a water inlet (4063) being provided at the upper end of the water supply tank (4061), a disc (4064) being provided in the water supply tank (4061), a rubber sleeve (4065) being provided on the disc (4064), a water storage tank (4066) being provided on the outer ring of the disc (4064), and a rotating shaft (4067) being connected to the middle of the disc (4064).

2. A high-purity formaldehyde ester extraction device according to claim 1, characterized in that: The water outlet (4062) is obliquely inserted into the separation tank body (401), the water inlet (4063) is fixedly connected to the water storage tank (407), and two sets of bearings are provided at both ends of the rotating shaft (4067), and the bearings are embedded in the inner wall of the water supply tank (4061).

3. A high-purity formaldehyde ester extraction device according to claim 1, characterized in that: The plurality of groups of stirring blades (403) are welded to the stirring shaft (402), a bearing is provided at one end of the stirring shaft (402), and the bearing is embedded in the separation tank body (401), and one end of the conduit (2) extends into the separation tank body (401).

4. A high-purity formaldehyde ester extraction device according to claim 1, characterized in that: The middle of the small gear (4051) is connected to the stirring shaft (402), a bearing is provided at one end of the first shaft (4053), and the bearing is embedded in the separation tank body (401), and the second shaft (4054) is fixed on the side of the large gear (4052) that deviates from the axis, and the second shaft (4054) is slidably connected to the rectangular hole (4055).

5. A high-purity formaldehyde ester extraction device according to claim 1, characterized in that: The rubber sleeve (4065) is adhered to the disc (4064), and the disc (4064) and the rubber sleeve (4065) are rotatably connected to the inner cavity of the water tank (4061), and one end of the rotating shaft (4067) is fixedly connected to the rocker (74).

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