Ethanolamine reaction liquid flash dehydration device

Abstract

The utility model discloses a flash dehydration device for ethanolamine reaction liquid, which belongs to the technical field of chemical production and comprises a dehydration tank, an air inlet pipe arranged on one side of the dehydration tank, an exhaust pipe arranged on the upper portion of the dehydration tank, a spring column inversely arranged on a fixing ring, a wire mesh demister arranged on the spring column, and a deflector rod arranged at the center of the bottom of the wire mesh demister. The end of the deflector rod is hemispherical, a fixing block is arranged on the dewatering tank, a gear motor is arranged on the fixing block, a bearing is further arranged on the fixing block, an output shaft of the gear motor penetrates through the bearing and extends into the dewatering tank, a rotating shaft is arranged in the dewatering tank, the rotating shaft is connected with the output shaft of the gear motor, and a disc is arranged on the rotating shaft. According to the utility model, through intermittent vibration of the wire mesh demister, the falling of water drops on the wire mesh demister is accelerated, the ventilation quantity of the wire mesh demister is increased, and potential safety hazards caused by pressure increase in the dehydration tank due to blockage of the wire mesh demister by the water drops are avoided.

Description

TECHNICAL FIELD

[0001] The utility model relates to a technical field of chemical production, concretely is a kind of ethanolamine reaction liquid flash evaporation dewatering device. BACKGROUND

[0002] Ethylene oxide ammonolysis method is one of the mainstream routes of industrial production of ethanolamine today, its principle is that under the condition of water as catalyst, ethylene oxide and excess liquid ammonia or ammonia water occur continuous competition reaction in tubular reactor, produce monoethanolamine, diethanolamine and triethanolamine mixture.Reaction liquid includes unreacted ammonia and water in addition to ethanolamine substances, need be subjected to flash evaporation ammonia removal and vacuum dehydration process and rectification separation process in turn to obtain monoethanolamine, diethanolamine and triethanolamine.Ammonia removal process often uses ammonia tower, ammonia evaporated at top returns to reactor circulation.Ammonia is extremely soluble in water, a large amount of ammonia evaporation entrains water drop to ammonia tower top, finally enters reactor circulation.In this process, due to ammonia evaporation water, ammonia tower top temperature is high, the heat load of ammonia condenser at top is high, therefore water vapor in ammonia gas needs to be removed, and the prior art passes ammonia gas with water vapor generated by ethanolamine reaction liquid flash evaporation into dehydration device, removes water vapor in ammonia gas by wire mesh demister in dehydration device, however, although wire mesh demister can intercept water vapor, make water in water vapor condense into liquid drop and fall in dehydration device, but as liquid drop on wire mesh demister needs to condense to a certain size to fall, when ammonia gas and water vapor concentration in dehydration device is large, often due to water drop on wire mesh demister blockage, cause ventilation of wire mesh demister to be small, further make pressure in dehydration device to be too large, and cause safety hazard. SUMMARY

[0003] In order to solve the technical problems mentioned in the background art, the utility model provides a kind of ethanolamine reaction liquid flash evaporation dewatering device, the technical scheme as follows is adopted:

[0004] Including dehydration tank, dehydration tank one side is provided with inlet pipe, dehydration tank upper portion is provided with exhaust pipe, dehydration tank is provided with fixed ring, spring post is inverted on fixed ring, spring post is provided with wire mesh demister on it, wire mesh demister bottom center is provided with poking rod, the end of poking rod is hemispherical, dehydration tank is provided with fixed block, fixed block is provided with speed reducer, fixed block is also provided with bearing, the output shaft of speed reducer penetrates bearing and extends to the inside of dehydration tank, dehydration tank is provided with rotating shaft, rotating shaft is connected with the output shaft of speed reducer, rotating shaft is provided with disc, disc is provided with arc-shaped poking block.

[0005] Further, the exhaust pipe is two or more.

[0006] Further, the dehydration tank bottom is provided with straight pipe, the valve is provided on the straight pipe, the inclined pipe is provided on the lower side of the valve on the straight pipe.

[0007] Further, the bottom of the dewatering tank is provided with a supporting leg.

[0008] The utility model has the advantages that when ammonia gas enters the dewatering tank, the ammonia gas passes through the wire mesh demister, the water vapor in the ammonia gas is intercepted by the wire mesh demister, gathers into water drops and falls in the dewatering tank, the reduction motor drives the rotating shaft to rotate slowly, the rotating shaft drives the disc and the arc-shaped poking block on the disc to rotate, the arc-shaped poking block drives the poking rod bottom when rotating, makes the poking rod rise, the poking rod drives the wire mesh demister to rise, the wire mesh demister drives the spring post to stretch, when the arc-shaped poking block leaves the poking rod, the poking rod and the wire mesh demister suddenly fall, the spring post rebounds and drives the wire mesh demister to vibrate, so that the water drops on the wire mesh demister are shaken off quickly, the utility model passes through the intermittent vibration of the wire mesh demister, accelerates the falling of the water drops on the wire mesh demister, increases the ventilation of the wire mesh demister, avoids the wire mesh demister from being blocked by the water drops and increasing the pressure in the dewatering tank, and causes the safety hidden danger. BRIEF DESCRIPTION OF DRAWINGS

[0009] Fig. 1 It is the internal perspective view of the utility model;

[0010] Fig. 2 It is the perspective view of the utility model.

[0011] The drawings show that: 1 is a dewatering tank, 2 is an air inlet pipe, 3 is an air outlet pipe, 4 is a fixed ring, 5 is a spring post, 6 is a wire mesh demister, 7 is a poking rod, 8 is a fixed block, 9 is a reduction motor, 10 is a bearing, 11 is a rotating shaft, 12 is a disc, 13 is an arc-shaped poking block, 14 is a straight pipe, 15 is a valve, 16 is an inclined pipe, and 17 is a supporting leg. DETAILED DESCRIPTION

[0012] The technical scheme in the embodiments of the utility model will be described clearly and completely in combination with the drawings in the embodiments of the utility model, and obviously, the described embodiments are only part of the embodiments of the utility model, not all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by the person skilled in the art without creative labor fall within the protection scope of the utility model.

[0013] Please refer to Figs. 1-2The utility model discloses an ethanolamine reaction liquid flash dehydration device, including the dehydration tank 1, the dehydration tank 1 one side is provided with the air inlet pipe 2, ammonia gas enters the dehydration tank 1 through the air inlet pipe 2, the dehydration tank 1 upper portion is provided with the exhaust pipe 3, and the ammonia gas of dehydration steam is discharged through the exhaust pipe 3, and the dehydration tank 1 is provided with the fixed ring 4 in, and the fixed ring 4 is fixed in the inner wall of dehydration tank 1, and the spring post 5 is inverted on the fixed ring 4, and the wire mesh demister 6 is set up on the spring post 5, and one end of spring post 5 is fixed with wire mesh demister 6, and the other end is fixed with fixed ring 4, and wire mesh demister 6 is movably arranged in the dehydration tank 1, and the wire mesh demister 6 bottom center is provided with the lever 7, and the lever 7 is fixed on wire mesh demister 6, and the lever 7 end is hemispherical, and the dehydration tank 1 is provided with the fixed block 8, and the fixed block 8 is fixed on the dehydration tank 1, and the fixed block 8 is provided with the speed reducer 9, and the speed reducer 9 is fixed on the fixed block 8, and the fixed block 8 is also provided with the bearing 10, and the output shaft of speed reducer 9 penetrates bearing 10 and extends to the inside of dehydration tank 1, and the output shaft of speed reducer 9 rotates in bearing 10, and the dehydration tank 1 is provided with the pivot 11, and the pivot 11 is connected with the output shaft of speed reducer 9, and speed reducer 9 drives pivot 11 to rotate, and the pivot 11 is provided with the disc 12, and the disc 12 is provided with the arc-shaped shift block 13, and pivot 11 drives disc 12 and arc-shaped shift block 13 to rotate.

[0014] The exhaust pipe 3 is two and more, when the ammonia gas amount through the wire mesh demister 6 is large, it is convenient to discharge from the exhaust pipe 3 smoothly.

[0015] The dehydration tank 1 bottom is provided with the straight pipe 14, and the straight pipe 14 is provided with the valve 15, and the valve 15 controls the switch of straight pipe 14, and the straight pipe 14 is provided with the inclined pipe 16 on the downside of valve 15, opens the valve 15, and the water in the dehydration tank 1 enters the straight pipe 14, then is discharged through the inclined pipe 16, and the dehydration tank 1 bottom is provided with the supporting leg 17, and the dehydration tank 1 bottom is supported.

[0016] The working principle of the utility model is as follows:

[0017] Close valve 15, and the ammonia gas with water vapor enters the dehydration tank 1 through the air inlet pipe 2, and the ammonia gas passes through the wire mesh demister 6, and the water vapor in the ammonia gas is intercepted by the wire mesh demister 6, and gathers into water droplets and falls in the dehydration tank 1, and the speed reducer 9 drives the pivot 11 to rotate slowly, and the pivot 11 drives the disc 12 and the arc-shaped shift block 13 on the disc 12 to rotate, and the arc-shaped shift block 13 rotates and pushes the lever 7 bottom, makes the lever 7 rise, and the lever 7 drives the wire mesh demister 6 to rise, and the wire mesh demister 6 drives the spring post 5 to stretch, when the arc-shaped shift block 13 leaves the lever 7, the lever 7 and the wire mesh demister 6 fall suddenly, and the spring post 5 rebounds and drives the wire mesh demister 7 to vibrate, so that the water droplets that do not fall on the wire mesh demister 6 shake off quickly.

[0018] The utility model discloses simple operation, convenient to use is suitable for overall popularization and application. Although the embodiment of the utility model has been shown and described, for the ordinary skilled person in the art, it can be understood that the embodiment can be changed, modified, replaced and changed in various ways without departing from the principle and spirit of the utility model, and the scope of the utility model is defined by the appended claims and their equivalents.

Claims

1. An ethanolamine reaction liquid flash dehydration device, comprising a dehydration tank (1), one side of the dehydration tank (1) is provided with an air inlet pipe (2), and the upper portion of the dehydration tank (1) is provided with an air outlet pipe (3), characterized in that, A fixed ring (4) is arranged in the dehydration tank (1), a spring column (5) is inverted on the fixed ring (4), a wire mesh demister (6) is arranged on the spring column (5), a push rod (7) is arranged at the bottom center of the wire mesh demister (6), the end of the push rod (7) is hemispherical, a fixed block (8) is arranged on the dehydration tank (1), a speed reducer (9) is arranged on the fixed block (8), a bearing (10) is further arranged on the fixed block (8), the output shaft of the speed reducer (9) penetrates through the bearing (10) and extends to the inside of the dehydration tank (1), a rotating shaft (11) is arranged in the dehydration tank (1), the rotating shaft (11) is connected with the output shaft of the speed reducer (9), a disc (12) is arranged on the rotating shaft (11), and an arc-shaped push block (13) is arranged on the disc (12).

2. The ethanolamine reaction solution flash dehydration apparatus according to claim 1, characterized by The exhaust pipe (3) is two or more.

3. The ethanolamine reaction solution flash dehydration apparatus according to claim 1, characterized by A straight pipe (14) is arranged at the bottom of the dehydration tank (1), a valve (15) is arranged on the straight pipe (14), and an inclined pipe (16) is arranged on the straight pipe (14) below the valve (15).

4. The ethanolamine reaction solution flash dehydration apparatus according to claim 1, characterized by A supporting leg (17) is arranged at the bottom of the dehydration tank (1).

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