CN210131620U

CN210131620U - Acetone cyanhydrin unit ACH stabilizes jar

Info

Publication number: CN210131620U
Application number: CN201920714585.1U
Authority: CN
Inventors: 陈国良
Original assignee: Individual
Current assignee: Individual
Priority date: 2019-05-19
Filing date: 2019-05-19
Publication date: 2020-03-10
Anticipated expiration: 2029-05-19

Abstract

The utility model discloses an acetone cyanohydrin unit ACH stabilization tank, which comprises a tank body, wherein the tank body is composed of an elliptical head, a barrel body and a tank bottom from left to right in sequence, a coarse ACH inlet is arranged on the barrel body, and the coarse ACH inlet is connected with a first pipeline positioned in the barrel body; a discharge hole is formed in the bottom of the cylinder body; the barrel is also provided with a backflow port, and the backflow port is connected with a second pipeline positioned in the barrel; the barrel is also provided with a feed inlet which is positioned at the top of the barrel and is connected with a third pipeline positioned in the barrel; a liquid level switch port is also arranged above the cylinder body, and a temperature instrument port is also arranged below the cylinder body; the tank bottom is sequentially provided with a first liquid level meter port and a second liquid level meter port from top to bottom. The stabilization tank effectively solves the problems that the reaction temperature, the retention time, the back mixing degree and the flowing state seriously restrict the yield of the acetone cyanohydrin, the polymerization of hydrocyanic acid is initiated and the refining and the decomposition of the acetone cyanohydrin are stable in operation.

Description

Acetone cyanhydrin unit ACH stabilizes jar

Technical Field

The utility model relates to a chemical industry equipment technical field, concretely relates to acetone cyanohydrin unit ACH stabilization tank for acetone cyanohydrin production.

Background

In the production process of the acetone cyanohydrin, hydrocyanic acid reacts with acetone to generate the acetone cyanohydrin, the reaction temperature, the retention time, the back mixing degree and the flow state seriously restrict the yield of the acetone cyanohydrin and initiate the polymerization of the hydrocyanic acid, at present, the domestic production adopts 4 reactors which are provided with a frozen saline water jacket and stirred to be connected in series to produce the acetone cyanohydrin, the equipment investment is large, the heat exchange area is small, the reaction temperature is difficult to control, the back mixing is serious, and the polymerization of the hydrocyanic acid is easy to cause.

In chinese patent document CN205019753U, a methyl methacrylate recovery tank is disclosed, which comprises a tank body, a first feed inlet, a discharge outlet, a temperature controller, a second feed inlet, an exhaust outlet, an annular heater, a lead plate, a tank cover and a flange, wherein the annular heater is arranged at the bottom of the tank body; the second feed inlet is formed in the tank cover; the exhaust port is arranged on the tank cover and is positioned on one side of the second feed port; the tank cover is connected with the tank body through a flange; the temperature controller is arranged on the tank cover; the first feed inlet is formed in the outer wall of one side of the tank body; the discharge hole is arranged on the outer wall of the tank body relative to the first feed hole; the lead plate is arranged on the inner wall of the tank body.

However, the recovery tank in the above technical solution cannot be directly used as an ACH stabilization tank of an acetone cyanohydrin unit, and there are undesirable places in the actual use process.

SUMMERY OF THE UTILITY MODEL

The to-be-solved technical problem of the utility model is to provide a jar is stabilized to acetone cyanohydrin unit ACH.

In order to solve the technical problem, the utility model adopts the technical scheme that the tank body is sequentially composed of an elliptical head, a cylinder body and a tank bottom from left to right, a thick ACH inlet is arranged on the cylinder body, and the thick ACH inlet is connected with a first pipeline positioned in the cylinder body; a discharge hole is formed in the bottom of the cylinder; the cylinder body is also provided with a backflow port, and the backflow port is connected with a second pipeline positioned in the cylinder body; the barrel is also provided with a feed inlet, the feed inlet is positioned at the top of the barrel, and the feed inlet is connected with a third pipeline positioned in the barrel; a liquid level switch port is also arranged above the cylinder body, and a temperature instrument port is also arranged below the cylinder body; the tank bottom is provided with a first liquid level meter port and a second liquid level meter port from top to bottom in sequence. In the technical scheme, the discharge port is used for discharging materials, the feed port is used for feeding materials, the second pipeline is connected with the reflux port, and materials refluxed from the reflux port are added into the reaction body in such a way, so that back mixing cannot be caused; the first liquid level meter port and the second liquid level meter port are used for measuring liquid level, and the temperature meter port is used for being connected with a thermometer and displaying the temperature in the tank; compared with the prior art, the technical scheme can effectively solve the problems that the reaction temperature, the retention time, the back mixing degree and the flow state seriously restrict the yield of the acetone cyanohydrin and initiate the polymerization of the hydrocyanic acid, and has the advantages of high yield of the acetone cyanohydrin product, good quality, low equipment investment and stable operation.

Preferably, a first saddle and a second saddle are arranged below the cylinder, a first electrostatic grounding plate is arranged on the first saddle, and a second electrostatic grounding plate is arranged on the second saddle; the discharge hole is positioned between the first saddle and the second saddle. The first saddle and the second saddle are arranged to better support and fix the stabilization tank, and the first electrostatic grounding plate and the second electrostatic grounding plate are arranged to stabilize the tank to enable electric charges to be dissipated in the reaction process.

Preferably, the top of the cylinder body is also provided with a standby port. The spare port can be used as a feed port or a gas inlet or a liquid inlet, and the arrangement can facilitate some adjustment of the reactant in the stabilization tank according to the production condition in real time.

Preferably, a ladder platform is arranged on the outer side of the barrel. Can climb up through the ladder, can look over the state in the jar.

Preferably, a manhole is arranged on the outer side of the elliptical sealing head. The manhole is used for observing the reaction condition in the cylinder body.

Preferably, a three-way pipe is arranged at the bottom of the second pipeline, the three-way pipe is connected with an ejector, and the ejector rotates 90 degrees and is arranged in parallel with the cylinder body. The three-way pipe is arranged, the ejector is convenient to install, a jet orifice of the ejector is arranged along the horizontal direction, a certain backflow vortex is formed at the bottom of the reaction body, the reaction is more uniform, the reaction is more sufficient in a uniform mixing reaction system, and the degree of uniform mixing can be controlled by controlling the ejection speed.

Preferably, the first electrostatic grounding plate is arranged on the first saddle and arranged at one side close to the discharge hole, and the second electrostatic grounding plate is arranged on the second saddle and arranged at the other side close to the discharge hole.

Preferably, the cylinder is further provided with an air release port, a pressure gauge port, a safety valve port, a desalted water inlet and a sulfuric acid inlet; and a reinforcing ring is also arranged on the periphery of the cylinder body.

Preferably, the third pipeline is spliced by a plurality of connecting pipes through flanges; the bottom of the third pipeline is connected with the supporting plate through a U-shaped bolt. According to the specification and size of the tank body, the third pipeline can be spliced by a plurality of connecting pipes and is fixed by the supporting plate, so that the third pipeline is prevented from shaking in the barrel body.

Preferably, the periphery of the tank bottom is also provided with a heat preservation ring.

Drawings

The following is a more detailed description of embodiments of the present invention with reference to the accompanying drawings:

FIG. 1 is a schematic diagram of the structure of the ACH stabilization tank of the acetone cyanohydrin unit of the present invention;

FIG. 2 is a schematic diagram of the second conduit of FIG. 1;

FIG. 3 is a schematic cross-sectional view D-D of FIG. 2;

FIG. 4 is a schematic diagram of the right-hand side view of FIG. 1;

FIG. 5 is a schematic view of the structure of FIG. 1 in which the reinforcing ring is welded to the cylinder;

wherein: 1-tank body; 2-an elliptical end enclosure; 3-a cylinder body; 4-tank bottom; 5-coarse AHC entry; 6-a feed inlet; 7-a first conduit; 8-a discharge hole; 9-pressure gauge port; 10-a second conduit; 11-a reflux port; 12-a relief port; 13-a first level gauge port; 14-a second level gauge port; 15-a third conduit; 16-relief valve port; 17-a desalted water inlet; 18-a first electrostatic grounding plate; 19-a second electrostatic grounding plate; 20-a reinforcing ring; 21-a ladder platform; 22-manhole; 23-a tee pipe; 24-temperature meter port; 25-liquid level switch port; 26-temperature meter port; 27-a first saddle; 28-a second saddle; 29-spare port; 30-an ejector; 31-a sulfuric acid inlet; 32-a flange; 33-U-bolt; 34-support plate.

Detailed Description

The technical solution of the present invention will be further described in detail with reference to the accompanying drawings.

As shown in fig. 1-5, the acetone cyanohydrin unit ACH stabilization tank of the present invention, the tank body 1 is composed of an elliptical head 2, a cylinder 3 and a tank bottom 4 from left to right, the cylinder 3 is provided with a coarse ACH inlet 5, and the coarse ACH inlet 5 is connected to a first pipeline 7 located in the cylinder 3; a discharge hole 8 is formed in the bottom of the cylinder 3; the barrel 3 is also provided with a return port 11, and the return port 11 is connected with a second pipeline 10 positioned in the barrel 3; the barrel 3 is also provided with a feed inlet 6, the feed inlet 6 is positioned at the top of the barrel 3, and the feed inlet 6 is connected with a third pipeline 15 positioned in the barrel 3; a liquid level switch port 25 is also arranged above the cylinder body 3, and a temperature instrument port 26 is also arranged below the cylinder body; a first liquid level meter port 13 and a second liquid level meter port 14 are sequentially arranged on the tank bottom 4 from top to bottom; a first saddle 27 and a second saddle 28 are arranged below the cylinder 3, a first static grounding plate 18 is arranged on the first saddle 27, and a second static grounding plate 19 is arranged on the second saddle 28; the spout 8 is located between the first saddle 27 and the second saddle 28. The first saddle 27 and the second saddle 28 are arranged to better support and fix the stabilization tank, and the top of the barrel 3 is also provided with a standby port 29; a ladder platform 21 is arranged on the outer side of the barrel 3; a manhole 22 is arranged on the outer side of the elliptical seal head 1; a three-way pipe 23 is arranged at the bottom of the second pipeline 10, the three-way pipe 23 is connected with an ejector 30 (the ejector 30 is a commercially available part, and a manufacturer is deltt mixing equipment limited), the ejector 30 rotates 90 degrees and is arranged in parallel with the direction of the cylinder, and the jet orifice of the ejector 30 is arranged along the horizontal direction; the first electrostatic grounding plate 27 is arranged on the first saddle 18 and on one side close to the spout 8, and the second electrostatic grounding plate 28 is arranged on the second saddle 19 and on the other side close to the spout 8; the cylinder 3 is also provided with an air relief port 12, a pressure gauge port 9, a safety valve port 16, a desalted water inlet 17 and a sulfuric acid inlet 31; a reinforcing ring 20 is further arranged on the periphery of the cylinder 3; the third pipeline 15 is spliced by a plurality of connecting pipes through flanges 32; the bottom of the third pipe is connected to a support plate 34 by means of a U-bolt 33. The periphery of the tank bottom is also provided with a heat preservation ring.

When in specific use: crude acetone cyanohydrin flows into a cylinder 3 of a stabilization tank from a crude ACH inlet 5, sulfuric acid metered externally enters the cylinder 3 through a sulfuric acid inlet 31 to adjust the pH value to be between 2.8 and 3.2, desalted water metered externally enters the cylinder 3 through a desalted water inlet 17 and enters a delivery pump outside the stabilization tank through a discharge port 8, one part of the crude acetone cyanohydrin conveyed by the pump is conveyed to a next procedure refining tower, the other part of the crude acetone cyanohydrin conveyed by the pump flows back to a tank feed port 6 after being detected by a pH meter arranged on a pipeline to drive an ejector 30 to drive liquid in the cylinder 3 to severely and repeatedly disturb and mix uniformly, the liquid level is controlled by a liquid level meter provided with a first liquid level meter port 13 and a second liquid level meter port 14, and in order to prevent the liquid level meter from malfunctioning, a liquid level switch 25 is arranged on the tank to install the liquid level switch action, and an automatic cut-off valve arranged on a pipeline of a crude acetone cyanohydrin (crude ACH) inlet 5 for stabilizing the feeding of the tank is closed; the temperature is controlled between 0 ℃ and 4 ℃ by the teletransmission thermometer of the installation of temperature instrument mouth 26, and the surge tank is the normal pressure operation, and the produced gas is derived by being provided with relief port 12, and pressure is by the teletransmission pressure gauge of pressure gauge mouth 9 demonstration, prevents that the blow-down pipe is not smooth to be led to the production surge tank and suppresses the pressure.

The foregoing illustrates and describes the principles, general features, and advantages of the present invention. It will be understood by those skilled in the art that the present invention is not limited to the embodiments described above, but rather is described in the embodiments and descriptions herein to illustrate the principles of the invention and that various changes and modifications may be made without departing from the spirit and scope of the invention, for example, by making certain adjustments to the position of each entry on the barrel, all of which fall within the scope of the claimed invention. The scope of the invention is defined by the appended claims and equivalents thereof.

Claims

1. An acetone cyanohydrin unit ACH stabilization tank comprises a tank body and is characterized in that the tank body sequentially comprises an elliptical seal head, a cylinder body and a tank bottom from left to right, a coarse ACH inlet is formed in the cylinder body, and the coarse ACH inlet is connected with a first pipeline in the cylinder body; a discharge hole is formed in the bottom of the cylinder; the cylinder body is also provided with a backflow port, and the backflow port is connected with a second pipeline positioned in the cylinder body; the barrel is also provided with a feed inlet, the feed inlet is positioned at the top of the barrel, and the feed inlet is connected with a third pipeline positioned in the barrel; a liquid level switch port is also arranged above the cylinder body, and a temperature instrument port is also arranged below the cylinder body; the tank bottom is provided with a first liquid level meter port and a second liquid level meter port from top to bottom in sequence.

2. The acetone cyanohydrin unit ACH stabilization tank of claim 1, wherein a first saddle and a second saddle are disposed under the barrel, a first electrostatic grounding plate is disposed on the first saddle, and a second electrostatic grounding plate is disposed on the second saddle; the discharge hole is positioned between the first saddle and the second saddle.

3. The acetone cyanohydrin unit ACH stabilization tank of claim 1, wherein the top of the barrel is further provided with a spare port.

4. The acetone cyanohydrin unit, ACH stabilising tank of claim 3, wherein a ladder platform is provided on the outside of the barrel.

5. The ACH stabilization tank of acetone cyanohydrin unit according to claim 4, wherein a manhole is provided outside the elliptical head.

6. The acetone cyanohydrin unit ACH stabilization tank of claim 2, wherein a tee is provided at the bottom of the second pipe, to which an ejector is connected, and the ejector is rotated by 90 degrees and arranged parallel to the direction of the barrel.

7. The acetone cyanohydrin unit ACH stabilization tank of claim 2, wherein the first electrostatic grounding plate is disposed on the first saddle and on one side proximate to the spout, and the second electrostatic grounding plate is disposed on the second saddle and on the other side proximate to the spout.

8. The ACH stabilization tank of an acetone cyanohydrin unit according to any one of claims 1 to 6, characterized in that on the cylinder body, a relief port, a pressure gauge port, a safety valve port, a desalted water inlet and a sulfuric acid inlet are further provided; and a reinforcing ring is also arranged on the periphery of the cylinder body.

9. The acetone cyanohydrin unit ACH stabilization tank of claim 6, wherein the third pipeline is flanged from a number of nipples; the bottom of the third pipeline is connected with the supporting plate through a U-shaped bolt.