Rapid separation and extraction equipment for methylamine preparation

Abstract

The utility model discloses rapid separation and extraction equipment for methylamine preparation, which relates to the technical field of separation equipment and comprises a tower body, a liquid outlet is welded at the bottom end of the tower body, and a sensing component capable of rapidly sensing gas leakage is arranged at the top end of a heat exchanger. According to the rapid separation and extraction equipment for methylamine preparation, through the arrangement of the bobbin, the fixing frame, the gas sensor and the exhaust fan, during use, in the separation process, gas mainly enters the heat exchanger from the gas outlet, the exhaust fan continuously discharges the gas in the bobbin, suction force is generated on the left side of the bobbin, and when high-temperature and high-pressure gas leaks, the high-temperature and high-pressure gas is discharged out of the heat exchanger; according to the gas leakage monitoring device, gas can be rapidly sucked, the gas sensor keeps component detection of the sucked gas, when toxic substance leakage is found, the background can rapidly sense corresponding data, the gas leakage monitoring function is achieved, and the problem that the device does not have the gas leakage monitoring function is solved.

Description

TECHNICAL FIELD

[0001] The utility model relates to separating equipment technical field, concretely is a kind of for methylamine preparation's quick separation and extraction equipment. BACKGROUND

[0002] Methylamine is a kind of organic compound, is important organic chemical raw material, belongs to low toxicity class, and can form explosive mixture with air, and its aqueous solution is a kind of strong base.

[0003] By methanol and ammonia with 1: (1.5~4) batching ratio, under high temperature (425 DEG C), high pressure (2.45MPa), with active alumina as catalyst continuous gas phase catalytic reaction generates one, two, three methylamine mixture crude product, then through a series of distillation column continuous pressurized rectification separation, condensation deamination, dehydration, one, two, three methylamine industrial product can be obtained, wherein rectification column is mainly used for the quick separation and extraction of methylamine preparation, and the rectification column commonly seen on market is mostly similar in structure, and is constituted by column body, tray, reboiler and heat exchanger, and there is some deficiency in function in actual use process, and it has certain improvement space, such as in the process of rectification separation, high-temperature steam will enter heat exchanger, and the steam generated in the process of methylamine preparation is toxic, and inhalation can cause damage to human body, and a small amount of leakage itself smell is not obvious, not easy to be perceived, without gas leakage monitoring function.

[0004] Now, a kind of new quick separation and extraction equipment for methylamine preparation is proposed to solve the above problems. UTILITY MODEL CONTENT

[0005] The utility model is to provide a kind of quick separation and extraction equipment for methylamine preparation, to solve the problem of not having gas leakage monitoring function proposed in the above background.

[0006] In order to achieve the above object, the utility model provides the following technical scheme: a kind of quick separation and extraction equipment for methylamine preparation, including tower body, the bottom end of the tower body is welded with liquid outlet, the bottom of the right side of the tower body is welded with gas backflow port, the lower right side of the tower body is provided with reboiler, liquid outflow pipe is fixedly connected between the top end of the reboiler and the bottom end of liquid outlet, gas backflow pipe is fixedly connected between the left side of the reboiler and the right side of gas backflow port, the top of the tower body is welded with gas outlet, the top of the right side of the tower body is welded with liquid backflow port, the upper right side of the tower body is provided with heat exchanger, liquid backflow pipe is fixedly connected between the bottom end of the heat exchanger and the right side of liquid backflow port, gas outflow pipe is fixedly connected between the left side of the top of the heat exchanger and the top end of gas outlet, feed inlet is welded at the middle position of the left side of the tower body, a plurality of tower trays are fixedly connected in the inside of the tower body, overflow weir is welded at the top of the left and right sides of the tower tray respectively, liquid downcomer is fixedly connected to one side of the bottom of the tower tray, the top of the heat exchanger is provided with sensing assembly that can quickly perceive gas leakage.

[0007] The sensing assembly includes a barrel, which is arranged above the heat exchanger, and fixed frames are welded to the front and rear ends of the barrel, a gas sensor is fixedly connected to the middle position of the top end of the barrel, and an air extractor is installed on the right side of the barrel.

[0008] Preferably, the bottom end of the barrel is higher than the top end of the gas outlet, and the vertical center lines of the heat exchanger and the barrel coincide.

[0009] Preferably, the heat exchanger and the fixed frames are fixedly welded, and the fixed frames are symmetrically distributed about the vertical center line of the heat exchanger.

[0010] Preferably, the bottom end of the gas sensor penetrates the top end of the barrel and extends into the interior, and the horizontal center lines of the barrel and the air extractor coincide.

[0011] Preferably, an exhaust port is welded to the top of the left side of the tower body, a gas pressure sensor is fixedly connected to the top end of the exhaust port, an electromagnetic pressure relief valve is installed on the left side of the exhaust port, and a feed electromagnetic valve is installed on the left side of the feed inlet.

[0012] Preferably, the interiors of the exhaust port and the electromagnetic pressure relief valve are connected, and the gas pressure sensor, the electromagnetic pressure relief valve, and the feed electromagnetic valve are electrically connected.

[0013] Preferably, a plurality of gas floating ports are arranged at the top end of the tower tray, and a plurality of gas inlet ports are arranged at the bottom end of the tower tray.

[0014] Preferably, the positions of the gas floating ports and the gas inlet ports correspond one by one, the interiors of the gas floating ports and the gas inlet ports are connected, and the gas floating ports and the gas inlet ports are narrow at the top and wide at the bottom.

[0015] Compared with the prior art, the quick separation and extraction equipment for preparing methylamine has the advantages that it not only realizes the function of gas leakage monitoring, but also realizes the functions of automatic pressure relief and material cutting, and facilitates floating gas anti-clogging.

[0016] (1) By setting the bobbin, fixed frame, gas sensor and exhaust fan, when using, the mixed crude product after proportioning is injected into the tower body from the feed inlet, the solution flows along the tray, the liquid passes through the reboiler for heating from top to bottom, the generated gas passes through the heat exchanger for condensation from bottom to top, and the generated liquid passes through the heat exchanger from top to bottom. In the repeated distillation process, the separation and extraction of heavy component substances and light component substances are realized. In the separation process, the gas mainly enters the heat exchanger from the gas outlet, the exhaust fan continuously discharges the gas in the bobbin, the left side of the bobbin generates suction, and when the high-temperature and high-pressure gas leaks, the gas can be quickly sucked in. The gas sensor keeps detecting the composition of the sucked gas, and when toxic substances are found to leak, the corresponding data can be quickly sensed by the background, so that the function of gas leakage monitoring is realized.

[0017] (2) By setting the exhaust port, gas pressure sensor, electromagnetic pressure relief valve and feed electromagnetic valve, when using, the tower body is always kept in a high-temperature and high-pressure state, the exhaust port is connected to a gas treatment facility, and the gas pressure sensor at the exhaust port senses the pressure value in the tower body in real time. When the pressure exceeds the safety threshold, the feed electromagnetic valve is closed first, and at the same time, the electromagnetic pressure relief valve is opened at a uniform speed, so that the high-pressure gas in the tower body is slowly discharged, and the internal pressure is slowly decreased, so that the function of automatic pressure relief and material cutting is realized.

[0018] (3) By setting the floating gas port and the gas inlet, when using, the solution flows from the surface of the tray, and when the liquid level is higher than the overflow weir, the solution flows into the next layer of tray from the downcomer. The gas generated by the evaporation of the solution rises, enters along the gas inlet and floats out from the floating gas port. The floating gas port and the gas inlet form a group of horn-shaped holes with small upper and large lower, so that the floating gas pressure is increased, and the floating force is increased, so that the floating gas port is prevented from being blocked, the probability of unblocking is increased, and the function of facilitating floating gas anti-clogging is realized. BRIEF DESCRIPTION OF DRAWINGS

[0019] Figure 1 It is a front view of the partial cross-sectional structure of the utility model;

[0020] Figure 2 It is an enlarged structure schematic view of the partial cross-section of the bobbin of the utility model;

[0021] Figure 3 It is a front view of the partial cross-sectional structure of the utility model; Figure 1 It is an enlarged structure schematic view of the partial cross-section of the bobbin of the utility model;

[0022] Figure 4The utility model discloses a tower plate positive and negative contrast amplification structure schematic diagram.

[0023] In the drawing: 1, tower body; 2, liquid outlet; 3, gas backflow port; 4, reboiler; 5, liquid outflow pipe; 6, gas backflow pipe; 7, gas outlet; 8, liquid backflow port; 9, heat exchanger; 10, liquid backflow pipe; 11, gas outflow pipe; 12, cylinder pipe; 13, fixing frame; 14, gas sensor; 15, exhaust fan; 16, exhaust port; 17, gas pressure sensor; 18, electromagnetic pressure relief valve; 19, feed electromagnetic valve; 20, feed port; 21, tower plate; 22, overflow weir; 23, downcomer; 24, gas overflow port; 25, gas inlet. DETAILED DESCRIPTION

[0024] The technical solutions in the embodiments of the utility model will be clearly and completely described below with reference to the drawings in the embodiments of the utility model. 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 those skilled in the art without creative labor belong to the protection scope of the utility model.

[0025] Embodiment 1: please refer to Figures 1-4 A kind of quick separation and extraction equipment for methylamine preparation, including tower body 1, the bottom end of tower body 1 is welded with liquid outlet 2, the bottom of the right side of tower body 1 is welded with gas backflow port 3, the lower right side of tower body 1 is provided with reboiler 4, liquid outflow pipe 5 is fixedly connected between the top end of reboiler 4 and the bottom end of liquid outlet 2, gas backflow pipe 6 is fixedly connected between the left side of reboiler 4 and the right side of gas backflow port 3, the top of tower body 1 is welded with gas outlet 7, the top of the right side of tower body 1 is welded with liquid backflow port 8, the upper right side of tower body 1 is provided with heat exchanger 9, liquid backflow pipe 10 is fixedly connected between the bottom end of heat exchanger 9 and the right side of liquid backflow port 8, gas outflow pipe 11 is fixedly connected between the left side of the top of heat exchanger 9 and the top end of gas outlet 7, feed port 20 is welded at the middle position of the left side of tower body 1, a plurality of tower plates 21 are fixedly connected in the inside of tower body 1, overflow weir 22 is welded at the top of the left and right sides of tower plate 21 respectively, downcomer 23 is fixedly connected at the bottom of the side of tower plate 21, sensing assembly that can quickly sense gas leakage is arranged at the top of heat exchanger 9;

[0026] Please refer to Figures 1-4 A kind of quick separation and extraction equipment for methylamine preparation further includes sensing assembly, sensing assembly includes cylinder pipe 12, cylinder pipe 12 is arranged above heat exchanger 9, fixing frame 13 is welded at the front and back ends of cylinder pipe 12 respectively, gas sensor 14 is fixedly connected at the middle position of the top of cylinder pipe 12, exhaust fan 15 is installed at the right side of cylinder pipe 12;

[0027] The bottom end of the bobbin 12 is higher than the top end of the gas outlet 7, the vertical center lines of the heat exchanger 9 and the bobbin 12 coincide, the heat exchanger 9 and the fixed frame 13 are welded and fixed, the fixed frame 13 is symmetrically distributed about the vertical center line of the heat exchanger 9, and the bottom end of the gas sensor 14 penetrates the top end of the bobbin 12 and extends to the inside, the horizontal center lines of the bobbin 12 and the exhaust fan 15 coincide, and timely sensing can be realized when leakage occurs;

[0028] Specifically, as shown in Figure 1 and Figure 2 , the exhaust fan 15 continuously discharges the gas in the bobbin 12, and the left side of the bobbin 12 generates suction. When high-temperature and high-pressure gas leaks, the gas can be quickly sucked in. The gas sensor 14 keeps detecting the composition of the sucked gas. When toxic substances are found to leak, the corresponding data can be quickly sensed by the background.

[0029] Embodiment 2: The top of the left side of the tower body 1 is welded with an exhaust port 16, the top end of the exhaust port 16 is fixedly connected with a gas pressure sensor 17, the left side of the exhaust port 16 is installed with an electromagnetic pressure relief valve 18, the left side of the feed inlet 20 is installed with a feed electromagnetic valve 19, the inside of the exhaust port 16 and the electromagnetic pressure relief valve 18 are connected in communication, and the gas pressure sensor 17, the electromagnetic pressure relief valve 18 and the feed electromagnetic valve 19 are electrically connected. It can automatically relieve pressure and cut off material;

[0030] Specifically, as shown in Figure 1 and Figure 3 , the gas pressure sensor 17 at the exhaust port 16 senses the pressure value in the tower body 1 in real time. When the pressure exceeds the safety threshold, the feed electromagnetic valve 19 closes first, and at the same time the electromagnetic pressure relief valve 18 opens at a uniform speed, slowly discharges the high-pressure gas in the tower body 1, and makes the internal pressure of the tower body 1 decrease at a uniform speed.

[0031] Embodiment 3: The top end of the tower plate 21 is provided with a plurality of groups of floating gas ports 24, and the bottom end of the tower plate 21 is provided with a plurality of groups of gas inlets 25. The floating gas ports 24 and the gas inlets 25 are one-to-one corresponding in position. The floating gas ports 24 and the gas inlets 25 are narrow at the top and wide at the bottom. The inside of the floating gas port 24 and the gas inlet 25 is connected in communication. The gas pressure of the floating gas is increased by changing the screen hole structure;

[0032] Specifically, as shown in Figure 1 and Figure 4 , the floating gas port 24 and the gas inlet 25 form a horn-shaped hole with small top and large bottom, which can increase the floating gas pressure. After the floating force is increased, the floating gas port 24 can be prevented from being blocked, and the probability of breaking the blockage is increased.

[0033] Working principle: the utility model discloses in use, first, the mixed crude product after proportioning is injected from the feed inlet 20 into the tower body 1, the solution flows along the tray 21, liquid is heated from top to bottom through reboiler 4, the gas produced from bottom to top, the gas is condensed through the heat exchanger 9, and the liquid produced from top to bottom, realizes the separation and extraction of heavy component material and light component material in the repeated distillation process, in the separation process, the gas mainly enters into the heat exchanger 9 from the gas outlet 7, the air extractor 15 continuously discharges the gas in the cylinder tube 12, the suction force is generated on the left side of the cylinder tube 12, when the high-temperature high-pressure gas leaks, can quickly suck the gas, the gas sensor 14 keeps detecting the composition of the inhaled gas, when finding toxic substance leakage, the backstage can quickly perceive the corresponding data. The tower body 1 always keeps high-temperature high-pressure state, the exhaust port 16 is connected to the gas treatment facility, and the gas pressure sensor 17 at the exhaust port 16 senses the pressure value in the tower body 1 in real time, when the pressure exceeds the safety threshold, the feed electromagnetic valve 19 closes first, and the electromagnetic pressure relief valve 18 opens at a uniform speed, slowly discharges the high-pressure gas in the tower body 1, so that the internal pressure drops at a uniform speed. The solution flows from the surface of the tray 21, when the liquid level is higher than the overflow weir 22, then flows into the next layer of tray 21 from the downcomer 23, the gas produced by the solution evaporation rises, enters along the gas inlet 25 and floats out from the gas floating port 24, the gas floating port 24 and the gas inlet 25 form a group of horn-shaped holes that are small at the top and large at the bottom, which can increase the gas pressure of floating and the floating force, so as to avoid the blockage of the gas floating port 24 and improve the probability of unblocking.

[0034] It is obvious for those skilled in the art that the utility model is not limited to the details of the above-mentioned exemplary embodiments, and can be realized in other specific forms without departing from the spirit or basic characteristics of the utility model. Therefore, no matter from which point, the embodiments should be regarded as exemplary and non-limiting, the scope of the utility model is defined by the appended claims instead of the above description, and therefore all changes falling within the meaning and scope of the equivalent elements of the claims are intended to be included in the utility model. Any reference signs in the claims should not be regarded as limiting the involved claims.

Claims

1. A rapid separation and extraction apparatus for the production of methylamine comprising a column body (1), characterized in that: The bottom end of the tower body (1) is welded with a liquid outlet (2), the bottom of the right side of the tower body (1) is welded with a gas backflow port (3), the lower right side of the tower body (1) is provided with a reboiler (4), the top end of the reboiler (4) and the bottom end of the liquid outlet (2) are fixedly connected with a liquid outflow pipe (5), the left side of the reboiler (4) and the right side of the gas backflow port (3) are fixedly connected with a gas backflow pipe (6), the top of the tower body (1) is welded with a gas outlet (7), the top of the right side of the tower body (1) is welded with a liquid backflow port (8), the upper right side of the tower body (1) is provided with a heat exchanger (9), the bottom end of the heat exchanger (9) and the right side of the liquid backflow port (8) are fixedly connected with a liquid backflow pipe (10), the left side of the top of the heat exchanger (9) and the top end of the gas outlet (7) are fixedly connected with a gas outflow pipe (11), the middle position of the left side of the tower body (1) is welded with a feed inlet (20), a plurality of tower plates (21) are fixedly connected in the tower body (1), overflow weirs (22) are welded on the left and right sides of the top of the tower plate (21) respectively, a downcomer (23) is fixedly connected to one side of the bottom of the tower plate (21), the top of the heat exchanger (9) is provided with a sensing assembly capable of quickly sensing gas leakage. The sensing assembly comprises a cylinder pipe (12), the cylinder pipe (12) is arranged above the heat exchanger (9), fixed frames (13) are welded on the front and rear ends of the cylinder pipe (12) respectively, a gas sensor (14) is fixedly connected to the middle position of the top end of the cylinder pipe (12), and an air extractor (15) is mounted on the right side of the cylinder pipe (12).

2. A rapid separation and extraction apparatus for the production of methylamine according to claim 1, characterized in that: The bottom end of the cylinder pipe (12) is higher than the top end of the gas outlet (7), and the vertical center lines of the heat exchanger (9) and the cylinder pipe (12) coincide.

3. A rapid separation and extraction apparatus for the production of methylamine as claimed in claim 1, characterized in that: The heat exchanger (9) and the fixed frame (13) are welded and fixed, and the fixed frame (13) is symmetrically distributed about the vertical center line of the heat exchanger (9).

4. A rapid separation and extraction apparatus for the production of methylamine as claimed in claim 1, characterized in that: The bottom end of the gas sensor (14) penetrates through the top end of the cylinder pipe (12) and extends into the interior, and the horizontal center lines of the cylinder pipe (12) and the air extractor (15) coincide.

5. A rapid separation and extraction apparatus for the production of methylamine as claimed in claim 1, characterized in that: An exhaust port (16) is welded on the top of the left side of the tower body (1), a gas pressure sensor (17) is fixedly connected to the top end of the exhaust port (16), an electromagnetic pressure relief valve (18) is mounted on the left side of the exhaust port (16), and a feed electromagnetic valve (19) is mounted on the left side of the feed inlet (20).

6. A rapid separation and extraction apparatus for the production of methylamine as claimed in claim 5, characterized in that: The interiors of the exhaust port (16) and the electromagnetic pressure relief valve (18) are communicated, and the gas pressure sensor (17), the electromagnetic pressure relief valve (18) and the feed electromagnetic valve (19) are electrically connected.

7. A rapid separation and extraction apparatus for methylamine production according to claim 1, characterized in that: A plurality of gas floating ports (24) are arranged on the top end of the tower plate (21), and a plurality of gas inlets (25) are arranged on the bottom end of the tower plate (21).

8. A rapid separation and extraction apparatus for the production of methylamine according to claim 7, characterized in that: The positions of the gas floating ports (24) and the gas inlets (25) correspond one by one, the interiors of the gas floating ports (24) and the gas inlets (25) are communicated, and the gas floating ports (24) and the gas inlets (25) are narrow at the top and wide at the bottom.

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