Concentrating tower for producing dimethylacetamide

Abstract

The utility model discloses a concentration tower for producing dimethylacetamide, which comprises a concentration tower main body, and one end of the concentration tower main body is provided with an auxiliary structure for preheating raw materials during the production of dimethylacetamide; the auxiliary structure comprises a raw material tower arranged at one end of the concentrating tower main body, a feeding pipe is arranged at the upper end of the raw material tower, a preheating box is arranged in the raw material tower, and a heating disc is mounted at the lower end of the preheating box. When the auxiliary mechanism is used, raw material dimethylacetamide is firstly added into the raw material tower, the raw material is preheated through the built-in preheating box, and the preheated raw material is collected through circulation and waits to enter the concentrating tower subsequently for heating production. The production efficiency of raw materials entering the concentrating tower can be improved, the heating process of the raw materials is greatly shortened, and the practicability is higher.

Description

Technical Field

[0001] The utility model relates to the technical field of concentration towers for dimethylacetamide production, in particular to a concentration tower for dimethylacetamide production. Background Art

[0002] Dimethylacetamide is an important organic synthesis solvent, which is widely used in the fields of chemistry, textiles, plastics, electronics, etc. It needs to be concentrated in its production process to increase the yield and reduce the cost.

[0003] When the existing concentration tower is used, most of them are processed by directly placing the raw material dimethylacetamide into the concentration tower. The concentration tower is a device for concentrating the solute in the liquid. It uses steam or other gases sprayed from the bottom to contact the solute, so that the solute evaporates from the liquid and is taken away by the gas. After multiple cycles, the solute in the liquid is concentrated and finally discharged from the bottom of the tower. For this purpose, the dimethylacetamide at room temperature needs to be heated to emit steam. In this process, a lot of time is needed to heat the raw materials and wait, which greatly affects the production efficiency.

[0004] Therefore, we propose a concentration tower for dimethylacetamide production to solve the above problems. Utility Model Content

[0005] The utility model aims to provide a concentration tower for dimethylacetamide production. When the auxiliary mechanism is used, the raw material dimethylacetamide is first added into the raw material tower, and the raw material is preheated by a built-in preheating box. After circulation, the preheated raw material is collected and waits to enter the concentration tower for heating production. The production efficiency of the raw material after entering the concentration tower can be improved, the heating process of the raw material is greatly reduced, and the utility model is more practical, so as to solve the problems raised in the above-mentioned background technology.

[0006] In order to achieve the above purpose, the utility model provides the following technical solutions:

[0007] A concentration tower for producing dimethylacetamide comprises a concentration tower body, one end of which is provided with an auxiliary structure for preheating raw materials when producing dimethylacetamide; the auxiliary structure comprises a raw material tower arranged at one end of the concentration tower body, a feed pipe is arranged at the upper end of the raw material tower, a preheating box is arranged inside the raw material tower, a heating plate is installed at the lower end of the preheating box, a start sensor is installed on the inner wall of the heating plate, a discharge pipe is arranged at one end of the preheating box, a telescopic sealing cover is installed at the opening of the discharge pipe, a temperature sensor is arranged inside the preheating box, and an induction lifting rod is installed at one end of the preheating box.

[0008] In a further embodiment, a material guide pipe is provided between the concentration tower body and the raw material tower. The material guide pipe is in a seven-shaped shape and has a built-in water suction pump, with one end of the pipe being installed at the bottom of the raw material tower.

[0009] In a further embodiment, a push-down switch is provided on the other side of the heating plate, and the push-down switch has the same function as the start sensor, but the start sensor is remotely connected to the telescopic sealing cover, while the push-down switch is linearly connected to the heating plate.

[0010] In a further embodiment, the telescopic sealing cover is composed of two parts, namely an electric telescopic rod and a sealing cover, and the sealing cover is inserted and pulled into the inner wall of the discharge pipe through the electric telescopic rod.

[0011] In a further embodiment, the temperature sensor is inductively connected to the inductive lifting rod.

[0012] In a further embodiment, a control valve is disposed inside the feed pipe, and the control valve is a remote control valve and is also inductively connected to a temperature sensor.

[0013] Compared with the prior art, the beneficial effects of the utility model are:

[0014] 1. When using the auxiliary mechanism, first add the raw material dimethylacetamide into the raw material tower, preheat the raw material through the built-in preheating box, collect the preheated raw materials through circulation, and wait for subsequent heating production in the concentration tower, which can improve the production efficiency of the raw materials after entering the concentration tower, greatly shorten the heating process of the raw materials, and is more practical.

[0015] 2. During preheating, multiple sensors and temperature sensors can be set in the raw material tower to discharge the heated raw materials after reaching the appropriate temperature, and enter the bottom of the raw material tower to wait for production. At the same time, after the temperature of the temperature sensor drops, the built-in preheating box will be reset for the next round of preheating, so that automatic loading and unloading can be achieved during the preheating stage, which further improves production efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 This is a schematic diagram of the overall structure of a concentration tower for the production of dimethylacetamide;

[0017] Figure 2 This is a schematic diagram of the internal structure of a raw material tower of a concentration tower for dimethylacetamide production;

[0018] Figure 3 This is a schematic diagram of the structure of a preheating box of a concentration tower for the production of dimethylacetamide;

[0019] Figure 4 A concentration tower for dimethylacetamide production Figure 3Enlarged structural diagram at A in the middle.

[0020] In the figure: 1. Concentration tower body; 2. Material guide pipe; 3. Raw material tower; 4. Feed pipe; 5. Control valve; 6. Preheating box; 7. Heating plate; 8. Discharge pipe; 9. Telescopic sealing cover; 10. Start sensor; 11. Press switch; 12. Temperature sensor; 13. Induction lifting rod. DETAILED DESCRIPTION

[0021] In the description of the present utility model, it should be understood that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present utility model. In addition, the terms "first", "second", etc. are only used for descriptive purposes, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, features defined as "first", "second", etc. may explicitly or implicitly include one or more of the features. In the description of the present utility model, unless otherwise specified, "multiple" means two or more.

[0022] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installation", "connection" and "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be an indirect connection through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood by specific circumstances.

[0023] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0024] See also Figure 1-4 A concentration tower for dimethylacetamide production includes a concentration tower body 1. When in use, the concentration tower body 1 can absorb preheated raw materials from a raw material tower 3 through a material guide pipe 2 arranged at one end for production and processing;

[0025] A preheating box 6 is provided in the raw material tower 3. When in use, firstly, a temperature sensor 12 is provided in the preheating box 6. When the raw materials are not heated inside, the temperature of the temperature sensor 12 will decrease and maintain the temperature in the raw material tower 3. At this time, the temperature sensor 12 will start the control valve 5 provided on the feed pipe 4 for remote start, and the raw materials are poured from the feed pipe 4 into the preheating box 6 to wait for heating. The depth of the preheating box 6 is determined, and therefore, the time for controlling the feeding of the material in the control valve 5 is also set. The amount of material added each time is the capacity of the preheating box 6. The time taken to reach the appropriate capacity is constant, and the control valve 5 will be closed at this time.

[0026] After the feeding is completed, the heating plate 7 synchronously arranged at the lower end of the preheating box 6 will start heating to heat the built-in raw materials to a suitable temperature, generally 80°C, and this 80°C is based on the built-in heater of the concentration tower. The feed temperature of the heater is 80°C and the discharge temperature is 120°C. By heating to 80°C, the time for heating the concentration tower body 1 can be saved to improve efficiency. When the heating temperature is reached, the set temperature sensor 12 will start the induction lifting rod 13 according to the high temperature to raise the preheating box 6. After the lifting, the start sensor 10 arranged at the lower end of the preheating box 6 is released, and the set telescopic sealing cover 9 is started, thereby opening the sealed discharge pipe 8, so that the heated raw materials enter the bottom of the raw material tower 3 and wait for the guide pipe 2 to absorb and process;

[0027] After the preheating box 6, after the raw materials inside are unloaded, the temperature of the temperature sensor 12 will slowly drop. When it reaches the appropriate temperature, the control valve 5 and the induction lifting rod 13 will be started at the same time to lower the preheating box 6. After it is lowered, the start sensor 10 and the push-down switch 11 will be suppressed. The start sensor 10 will retract the telescopic sealing cover 9 and seal the discharge pipe 8, and the push-down switch 11 will start the heating plate 7 to heat the raw materials at the upper end.

[0028] The working principle of the utility model is as follows: as shown in the figure, when the concentration tower body 1 is in use, it can absorb the preheated raw materials from the raw material tower 3 for production and processing through the guide pipe 2 arranged at one end; and a preheating box 6 is arranged in the raw material tower 3. When in use, first, a temperature sensor 12 is arranged in the preheating box 6. When the raw materials are not heated inside, the temperature of the temperature sensor 12 will decrease and maintain the temperature in the raw material tower 3. At this time, the temperature sensor 12 will start the control valve 5 arranged on the feed pipe 4 for remote start, and the raw materials are poured from the feed pipe 4 into the preheating box 6 to wait for heating. The depth of the preheating box 6 is determined, and for this reason, the time for controlling the feeding by the control valve 5 is also set. The amount of each feeding is the capacity of the preheating box 6. The time used to reach the appropriate capacity is constant, and the control valve 5 will be closed at this time; and after the feeding is completed, the heating plate 7 synchronously arranged at the lower end of the preheating box 6 will start heating to heat the built-in raw materials to a suitable temperature, generally 80°C, and this 80°C is based on the built-in The heater comes from the feed temperature of the heater is 80°C and the discharge temperature is 120°C. By heating to 80°C, the heating time of the concentration tower body 1 can be saved to improve the efficiency. When the heating temperature is reached, the set temperature sensor 12 will start the induction lifting rod 13 according to the high temperature to lift the preheating box 6. After lifting, the start sensor 10 set at the lower end of the preheating box 6 is released, and the set telescopic sealing cover 9 is started, so that the sealed discharge pipe 8 is opened, so that the heated raw materials enter the bottom of the raw material tower 3 and wait for the guide pipe 2 to absorb and process; and after the preheating box 6, after the internal raw materials are unloaded, the temperature of the set temperature sensor 12 will slowly drop. When it reaches the appropriate temperature, the control valve 5 and the induction lifting rod 13 will be started at the same time to start the preheating box 6. After descending, the start sensor 10 and the press switch 11 will be pressed, wherein the start sensor 10 will retract the telescopic sealing cover 9 and seal the discharge pipe 8, and the set press switch 11 will start the heating plate 7 to heat the raw materials at the upper end.

[0029] It is obvious to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the present invention can be implemented in other specific forms without departing from the spirit or essential features of the present invention. Therefore, the embodiments should be regarded as exemplary and non-restrictive from any point of view, and the scope of the present invention is defined by the appended claims rather than the above description, and it is intended that all changes falling within the meaning and scope of the equivalent elements of the claims be included in the present invention. Any reference numeral in a claim should not be regarded as limiting the claim to which it relates.

[0030] In addition, it should be understood that although the present specification is described according to implementation modes, not every implementation mode contains only one independent technical solution. This description of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment may also be appropriately combined to form other implementation modes that can be understood by those skilled in the art.

Claims

1. A concentration tower for dimethylacetamide production, characterized in that: The invention comprises a concentration tower body (1), one end of which is provided with an auxiliary structure for preheating raw materials when producing dimethylacetamide; The auxiliary structure comprises a raw material tower (3) arranged at one end of a concentration tower body (1), a feed pipe (4) is arranged at the upper end of the raw material tower (3), a preheating box (6) is arranged inside the raw material tower (3), a heating plate (7) is installed at the lower end of the preheating box (6), a start sensor (10) is installed on the inner wall of the heating plate (7), a discharge pipe (8) is arranged at one end of the preheating box (6), a telescopic sealing cover (9) is installed at the opening of the discharge pipe (8), a temperature sensor (12) is arranged inside the preheating box (6), and an induction lifting rod (13) is installed at one end of the preheating box (6).

2. A concentration tower for dimethylacetamide production according to claim 1, characterized in that: A material guide pipe (2) is arranged between the concentration tower body (1) and the raw material tower (3). The material guide pipe (2) is in a seven-shaped shape and has a built-in water suction pump. One end of the material guide pipe is installed at the bottom of the raw material tower (3).

3. A concentration tower for dimethylacetamide production according to claim 1, characterized in that: A push-down switch (11) is provided on the other side of the heating plate (7). The push-down switch (11) has the same function as the start sensor (10), but the start sensor (10) is remotely connected to the telescopic sealing cover (9), while the push-down switch (11) is linearly connected to the heating plate (7).

4. The concentration tower for dimethylacetamide production according to claim 1, characterized in that: The telescopic sealing cover (9) is composed of two parts, namely an electric telescopic rod and a sealing cover. The sealing cover is inserted into the inner wall of the discharge pipe (8) through the electric telescopic rod.

5. The concentration tower for dimethylacetamide production according to claim 1, characterized in that: The temperature sensor (12) is inductively connected to the inductive lifting rod (13).

6. The concentration tower for dimethylacetamide production according to claim 1, characterized in that: A control valve (5) is arranged inside the feed pipe (4). The control valve (5) is a remote control valve and is also inductively connected to a temperature sensor (12).

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