CN210796295U - Preparation system of octyl pyrrolidone - Google Patents

Abstract

The utility model relates to a preparation system of octyl pyrrolidone, which comprises a first metering pump, a second metering pump, a static mixer, a high-temperature pipeline reactor, a crude product temporary storage tank, a circulating pump a, a light component rectifying tower, a reboiler a, a circulating pump b, a product rectifying tower, a reboiler b, a cooler a and a product groove; the reboiler a and the reboiler b respectively comprise a main body assembly, a water inlet assembly arranged on the main body assembly, a cleaning assembly arranged in the main body assembly and a discharge assembly which is communicated with the water inlet assembly and synchronously rotates with the water inlet assembly; the discharge assembly comprises a sewage discharge unit and a water discharge unit, and the sewage discharge unit and the water discharge unit are respectively communicated with the water inlet assembly in an alternating mode to complete separation work of purified water and dirt; the utility model provides an in this step of reboiler, can produce the incrustation scale, influence the technical problem of product purity quality.

Description

Preparation system of octyl pyrrolidone

Technical Field

The utility model relates to an octyl pyrrolidone prepares technical field, especially relates to an octyl pyrrolidone's preparation system.

Background

N-octyl pyrrolidone is a chemical substance with the molecular formula of C12H23NO, is a colorless to yellow liquid compound with amine smell, has the CAS number of 2687-94-7 and the molecular weight of 197.32, and is widely used as an insecticide, a cotton defoliant, a concentrated cleaning agent, a chemical reaction solvent, a drug synthesis medium and a coating stripping agent in the electronic industry. The modified polyether polyol is used as a surfactant, can be compounded with an anionic or nonionic surfactant for use, reduces the surface tension and provides the product performance.

At present, most of octyl pyrrolidone production processes are pressurized intermittent production processes, the production method has the advantages of small relative productivity, large equipment occupation area, difficulty in realizing automatic control, large capital investment and high production cost, and a mechanical stirrer seal is easy to wear and damage at high temperature, so that the maintenance cost of the device is high.

Patent No. CN 2006100520938N discloses a method for producing N-dodecyl pyrrolidone, which comprises the following steps: (1) adding dodecylamine and r-butyrolactone into a batching kettle, stirring at high speed, and then sending the mixture into a pipeline reactor with a front section of 40-60% of length part being a static mixer for reaction; (2) and (3) feeding the mixture reacted in the pipeline reactor into a continuous distillation tower for reduced pressure separation, wherein the distillate at the bottom of the tower is N-dodecyl pyrrolidone.

However, in the practical process, the inventor finds that scale is generated in the reboiler step, and the separation of the scale and clean water is complicated and affects the purity of the product.

SUMMERY OF THE UTILITY MODEL

The utility model aims at prior art's weak point, through setting up water pressure and erodeing clean subassembly, guide its steady movement in the heat exchange tube, remove the in-process and realize cleaing away the high efficiency of incrustation scale to solved in this step of reboiler, can produce the incrustation scale, also can influence the technical problem of product purity when incrustation scale and clean water separation work are loaded down with trivial details.

Aiming at the technical problems, the technical scheme is as follows: a preparation system of octyl pyrrolidone is characterized in that: comprises a first metering pump, a second metering pump, a static mixer, a high-temperature pipeline reactor, a crude product temporary storage tank, a circulating pump a, a light component rectifying tower, a reboiler a, a circulating pump b, a product rectifying tower, a reboiler b, a cooler a, a product groove and a cooler b, wherein the first metering pump and the second metering pump are communicated with the static mixer through a tee joint, the static mixer is connected with the high-temperature pipeline reactor through a pipeline, the static mixer is connected with a feed inlet of the crude product temporary storage tank, the light component rectifying tower is connected with the crude product temporary storage tank through the circulating pump a, the light component rectifying tower is connected with the feed inlet of the cooler b, the circulating pump a is connected with the circulating pump b through the product rectifying tower, the cooler a is connected with the product rectifying tower, a discharge port of the reboiler a is connected with a discharge port of the light component rectifying tower, and the feed inlet of the reboiler a discharge port of the reboiler a is connected with a discharge, the discharge hole of the reboiler b is connected with the discharge hole of the product rectifying tower, and the feed inlet of the reboiler b is connected with the discharge hole of the circulating pump b;

the reboiler a and the reboiler b respectively comprise a main body assembly, a water inlet assembly arranged on the main body assembly, a cleaning assembly arranged in the main body assembly and a discharge assembly which is communicated with the water inlet assembly and synchronously rotates with the water inlet assembly;

the discharging assembly comprises a sewage discharging unit and a water discharging unit, and the sewage discharging unit and the water discharging unit are communicated with the water inlet assembly in an alternating mode respectively to complete separation work of purified water and dirt.

Preferably, the body assembly comprises:

a frame; and

the device body comprises a shell, a flange, a discharge hole, a feed inlet, a tube plate and a heat exchange tube.

Preferably, the water inlet assembly includes:

the water supply unit comprises a water pump and water tank integrated machine arranged on the rack and a water pipe a communicated with the water pump and water tank integrated machine; and

the control unit comprises a rotary disc and a fixed seat, the rotary disc is arranged on one side of the flange and is attached to the flange, the fixed seat is arranged on one side of the rotary disc and is attached to the rotary disc, the rotary disc is rotatably arranged on the rack, and the fixed seat is fixedly arranged on the rack;

the flange, the rotary table and the fixing seat are coaxially arranged, and the rotary table is arranged in the middle.

Preferably, the flange and the fixed seat are both provided with through holes a and are symmetrically arranged relative to the rotary table, and the through holes a of the fixed seat are communicated with the water pipes a;

the flange and the fixed seat are respectively provided with a through hole b which is symmetrically arranged relative to the rotary table, the through holes a and b are linearly arranged along the diameter direction, and the through hole b of the fixed seat is communicated with the discharge assembly;

the turntable is provided with a through hole c and a through hole d, and the through hole c and the through hole d are respectively communicated with the through hole a and the through hole b in an interrupted manner;

the aperture sizes of the through hole a, the through hole b, the through hole c and the through hole d are the same, and are all A1.

Preferably, the cleaning assembly comprises:

the cleaning ball is cylindrical and is arranged in a flexible material structure, two ends of the cleaning ball are arranged in a hollow mode, the middle of the cleaning ball is arranged in a solid mode, and the cleaning ball sequentially flows through the through hole c, the through hole a, the heat exchange tube, the through hole b and the through hole d under the impulsive force of water;

the bumps are uniformly distributed on the side surface of the cleaning ball and penetrate through the cleaning ball, two adjacent bumps are arranged in a staggered mode along the height direction of the cleaning ball, the distance between the two adjacent bumps along the vertical direction of the height of the cleaning ball is L1, the width of each bump is L2, the width of each bump is L1-L2, and the bottom of the part, located in the cleaning ball, of each bump is provided with a chamfer; and

the top props the unit, the top props the unit along central line symmetry in the clean ball length sets up the upper and lower bottom surface of clean ball, it sets up including removing the clean ball is inside and with toper post, the symmetry that the bump bottom surface matches the setting set up the connecting plate and one end of toper post bottom surface with the connecting plate connect set up and the other end with the spring that sets up is connected to clean ball bottom.

Preferably, the discharge assembly further comprises a driving unit including:

the motor is arranged on the rack;

one end of the driving shaft is connected with the output end of the motor, the other end of the driving shaft is fixedly connected with the rotary disc, the driving shaft penetrates through a through groove in the fixed seat, the aperture of the through groove is D1, the aperture of the driving shaft is D2, and D1 is larger than D2;

the gear a is coaxial with the driving shaft and is fixedly connected with the driving shaft;

the gear b is meshed with the gear a;

the rotating shaft is fixedly arranged on the fixed seat and is rotatably arranged with the gear b.

Preferably, the sewage discharging unit and the water discharging unit are both water pipes b which are arranged on the rotating shaft and symmetrically arranged on two sides of the rotating shaft, one end of the water discharging unit facing the motor is embedded in one end of the sewage discharging unit facing the motor, the outer ring diameter of the water pipe b is A2, the inner ring diameter of the water pipe b is A3, and A2 is greater than A1 is greater than A3.

Preferably, the high-temperature pipeline reactor has a reaction temperature of 230-300 ℃.

Preferably, the external dimensions of the high temperature pipeline reactor are DN800 x 4000.

Preferably, the static mixer is of a jacketed type.

The utility model has the advantages that:

(1) the water pressure scouring cleaning component is arranged in the heat exchange tube to guide the water pressure scouring cleaning component to stably move in the heat exchange tube, so that scale can be quickly and efficiently removed in the moving process, the reboiler is not required to be shut down, disassembled and the like, the investment of manpower and material resources is greatly reduced, and the production efficiency is improved; in addition, the sewage discharge unit and the drainage unit in the drainage assembly are alternately connected with the water assembly, so that the automatic separation of water scale and clear water is realized, the automation of the whole device is improved, and the labor productivity is reduced;

(2) the utility model discloses in through setting up clean subassembly, when water pressure acts on the toper post, utilize toper post and bump bevel connection cooperation, make it under water pressure, the bump outwards struts, fully contacts with the inner wall of heat exchange tube, and then guarantee even after long-term the use, still can guarantee that the abundant contact of cleaning ball and heat exchange tube utilizes the tension of laminating between the two simultaneously, improve the incrustation scale on the cleaning ball to the heat exchange tube inner wall and fully wash, be favorable to carrying the incrustation scale better simultaneously, improve work efficiency;

(3) in the utility model, the driving unit is arranged to cooperate with the sewage discharging unit and the water discharging unit, so that the driving unit drives the turntable to rotate on the one hand, and the cleaning ball is reset to the initial working position; in addition, the rotation of the sewage discharge unit and the drainage unit is driven, so that the alternate switching of the sewage discharge and drainage is realized; the two works are driven by one power, the front and the back works are closely connected, errors are not easy to occur, and the thorough separation of water scale and clear water is favorably realized; meanwhile, additional power is saved, and the production cost is reduced;

(4) the utility model discloses in through pipeline reactor, can realize feeding in succession and output, than the cauldron formula reactor of adopting among the prior art, device production capacity has shown the improvement, has movable equipment to change quiet equipment into, equipment long service life, and production efficiency is high, adopts two tower continuous rectification simultaneously, improves the unit productivity to the product quality is more stable.

In conclusion, the equipment has the advantages of long service life of the device and low production cost, and is particularly suitable for the technical field of preparation of octyl pyrrolidone.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings needed to be used in the description of the embodiments will be briefly described below, and it is obvious that the drawings described below are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.

FIG. 1 is a schematic flow diagram of a system for the preparation of octyl pyrrolidone.

Fig. 2 is a schematic diagram of the reboiler a.

Fig. 3 is a schematic structural diagram of the control unit.

Fig. 4 is a schematic structural view of the cleaning assembly.

Fig. 5 is a schematic structural diagram of bump distribution.

Fig. 6 is a schematic view showing an alternate operation of the soil exhaust unit and the drain unit.

Fig. 7 is a schematic cross-sectional view of the drive unit.

Fig. 8 is an enlarged partial schematic view at a of fig. 7.

Fig. 9 is a partially enlarged schematic view at B of fig. 7.

Fig. 10 is an enlarged partial schematic view at C of fig. 7.

Detailed Description

The technical solution in the embodiment of the present invention is clearly and completely described below with reference to the accompanying drawings.

Example one

As shown in fig. 1 and fig. 2, a preparation system of octyl pyrrolidone includes a first metering pump 101, a second metering pump 102, a static mixer 103, a high temperature pipeline reactor 104, a crude product temporary storage tank 105, a circulating pump a106, a light component rectifying tower 107, a reboiler a108, a circulating pump b109, a product rectifying tower 110, a reboiler b111, a cooler a112, a product tank 113, and a cooler b114, where the first metering pump 101 and the second metering pump 102 are communicated with the static mixer 103 through a tee joint, the static mixer 103 is connected with the high temperature pipeline reactor 104 through a pipeline, the static mixer 103 is connected with a feed inlet of the crude product temporary storage tank 105, the light component rectifying tower 107 is connected with the crude product temporary storage tank 105 through the circulating pump a106, the light component rectifying tower 107 is connected with a feed inlet of the cooler b114, the circulating pump a106 is connected with the circulating pump b109 through the product rectifying tower 110, the cooler a112 is connected with the product rectifying tower 110, the discharge port of the reboiler a108 is connected with the discharge port of the light component rectifying tower 107, the feed port of the reboiler a is connected with the discharge port of the circulating pump a106, the discharge port of the reboiler b111 is connected with the discharge port of the product rectifying tower 110, and the feed port of the reboiler b111 is connected with the discharge port of the circulating pump b 109;

the reboiler a108 and the reboiler b111 both comprise a main body assembly 1, a water inlet assembly 2 arranged on the main body assembly 1, a cleaning assembly 3 arranged in the main body assembly 1, and a discharge assembly 4 which is communicated with the water inlet assembly 2 and synchronously rotates with the water inlet assembly;

the discharging assembly 4 comprises a sewage discharging unit 47 and a water discharging unit 48, wherein the sewage discharging unit 47 and the water discharging unit 48 are communicated with the water inlet assembly 2 alternately to complete separation of purified water and dirt.

Compared with the traditional preparation system, the utility model discloses creatively in reboiler a108, reboiler b111, through setting up water pressure and erode clean subassembly 3, guide it to move steadily in the heat exchange tube, realize the high efficiency clear away to the incrustation scale in the removal process, and need not shut down, dismantle work such as work to the reboiler, greatly reduced the input of manpower and materials, improved production efficiency; in addition, the automatic separation of water scales and clean water is realized by arranging the sewage discharge unit 47 and the water discharge unit 48 in the discharge assembly 4 to be alternately connected with the water assembly 2, so that the automation of the whole device is improved, and the labor productivity is reduced.

In this embodiment, the preparation process sequentially passes through a first metering pump 101, a second metering pump 102, a static mixer 103, a high-temperature pipeline reactor 104, a crude product temporary storage tank 105, a circulating pump a106, a light component rectifying tower 107, a reboiler a108, a circulating pump b109, a product rectifying tower 110, a reboiler b111, a cooler a112, and a product tank 113, a feed inlet of the first metering pump is connected with a butyrolactone stock tank, a feed inlet of the second metering pump is connected with a n-octylamine stock tank, outlets of the two metering pumps are fully mixed by the static mixer through a tee joint, and then enter the high-temperature pipeline reactor, the material passing through the high-temperature pipeline reactor flows into a jacket of the static mixer to preheat a stock mixture, then enters the crude product temporary storage tank, the light component rectifying tower is removed by a pump, and after the light component rectifying tower removes light component water, the product rectifying tower is continuously pumped to continuously produce a product; the whole process has small capital investment and equipment occupation area, is simple to operate, realizes continuous production, can be automatically controlled by a DCS (distributed control system), saves energy consumption and labor cost and reduces production cost; the reaction time is short, the yield is stable and can reach more than 93 percent; the pressurization and sealing reaction has high safety coefficient. No corrosive or irritant substance is generated in the production process, so that the production equipment is not corroded, and the environmental pollution is not generated.

In detail, a discharge port of the first metering pump and a discharge port of the second metering pump are connected to a pipeline through a tee joint, another pipe end of the three-way pipe is connected with a check valve, the check valve is connected with a feed port of the static mixer through a pipeline, the discharge port of the static mixer is connected with a feed port of the high-temperature pipeline reactor through a pipeline, the discharge port of the high-temperature pipeline reactor is connected with a jacket feed port of the static mixer through a pipeline, a jacket discharge port of the static mixer is connected with a crude product temporary storage tank, a discharge port of the crude product temporary storage tank is continuously pumped into a light component rectifying tower through a pump, the light component is removed out of a system through condensation, a semi-finished product is continuously pumped into a product rectifying tower, and the. The system is provided with a ball valve, a sampling valve, an emptying valve, a tube side thermometer, a back pressure valve, a tube side pressure gauge and the like.

In addition, the crude product is continuously separated by double towers, so that the operation is convenient, the energy is saved, and the utilization rate of the towers is improved; simultaneously, through pipeline reactor, can realize continuous feeding and output, the cauldron formula reactor that adopts among the prior art, device production capacity has showing and has improved, has movable equipment to change into quiet equipment, equipment long service life, and production efficiency is high, adopts two towers continuous rectification simultaneously, improves the productivity of unit to product quality is more stable.

Further, as shown in fig. 2, the main body assembly 1 includes:

a frame 11; and

the device comprises a device body 12, wherein the device body 12 comprises a shell 15, a flange 16, a discharge hole 17, a feed hole 18, a tube plate 19 and a heat exchange tube 20.

In this embodiment, the body 12 can realize the heating and vaporization of the material, wherein the material comes from the inlet 18 at the bottom of the shell 15, and the gas phase material returns to the rectifying tower from the outlet 17

Further, as shown in fig. 2 and 3, the water inlet assembly 2 includes:

the water supply unit 21 comprises a water pump and water tank all-in-one machine 22 arranged on the rack 11 and a water pipe a23 communicated with the water pump and water tank all-in-one machine 22; and

the control unit 24 comprises a rotary table 25 arranged on one side of the flange 16 and attached to the flange 16, and a fixed seat 26 arranged on one side of the rotary table 25 and attached to the rotary table 25, the rotary table 25 is rotatably arranged on the rack 11, and the fixed seat 26 is fixedly arranged on the rack 11;

the flange 16, the rotary disc 25 and the fixed seat 26 are coaxially arranged, and the rotary disc 25 is arranged in the center.

In the embodiment, the turntable 25 is arranged, so that the cleaning ball 31 embedded in the turntable 25 can be automatically reset; meanwhile, the rotating disc 25 has a sealing effect on the container body 12 during rotation.

Further, as shown in fig. 3, through holes a27 are formed in the flange 16 and the fixing seat 26 and are symmetrically arranged with respect to the rotating disc 25, and the through hole a27 of the fixing seat 26 is communicated with the water pipe a 23;

the flange 16 and the fixed seat 26 are respectively provided with a through hole b28 and are symmetrically arranged relative to the rotary table 25, the through hole a27 and the through hole b28 are linearly arranged along the diameter direction, and the through hole b28 of the fixed seat 26 is communicated with the discharge assembly 4;

the turntable 25 is provided with a through hole c29 and a through hole d30, and the through hole c29 and the through hole d30 are respectively communicated with the through hole a27 and the through hole b28 in an interrupted manner;

the aperture sizes of the through hole a27, the through hole b28, the through hole c29 and the through hole d30 are the same, and are all A1.

In the embodiment, the cleaning ball flows through the through hole a27, the through hole c29, the through hole a27, the heat exchange tube 20, the through hole b28, the through hole d30 and the through hole b28 in sequence under the flushing of water pressure, and the openings of the cleaning ball are connected, so that the normal flowing of water is realized.

Further, as shown in fig. 4 and 5, the cleaning assembly 3 includes:

the cleaning ball 31 is a cylinder and is arranged in a flexible material structure, two ends of the cleaning ball 31 are arranged in a hollow mode, and the middle of the cleaning ball 31 is arranged in a solid mode;

the salient points 32 are uniformly distributed on the side surface of the cleaning ball 31 and are arranged in a penetrating manner, two adjacent salient points 32 are arranged in a staggered manner along the height direction of the cleaning ball 31, the distance between the two adjacent salient points 32 along the height vertical direction of the cleaning ball 31 is L1, the width of each salient point 32 is L2, L1 is L2, and the bottom of the part, located inside the cleaning ball 31, of each salient point 32 is provided with a chamfer; and

the top supporting unit 33, the top supporting unit 33 along the central line symmetry that clean ball 31 is gone up in length sets up clean ball 31's upper and lower bottom surface, it sets up including removing clean ball 31 inside and with bump 32 bottom surface matches the connecting plate 35 and the one end that set up the toper post 34 bottom surface of symmetry and connecting plate 35 connect the setting and the other end with clean ball 31 bottom is connected the spring 36 that sets up.

In the embodiment, by arranging the cleaning component 3, when water pressure acts on the tapered column 34, the tapered column 34 is matched with the inclined opening of the convex point 32, so that the convex point is outwards propped open under the water pressure and is fully contacted with the inner wall of the heat exchange tube 20, and further, even after long-term use, the cleaning ball 31 can still be fully contacted with the heat exchange tube 20, and simultaneously, the tight tension of the contact of the cleaning ball 31 and the heat exchange tube 20 is utilized, so that the scale on the inner wall of the heat exchange tube 20 can be fully cleaned by the cleaning ball 31, and the working efficiency is improved;

it is worth to be noted that the spring 36 is arranged to realize the automatic reset of the conical column 34 under the condition of not being washed by water pressure, and the cleaning ball 31 is arranged in a flexible material structure, so that the interference work cannot occur when the cleaning ball 31 moves in the heat exchange tube 20;

it should be further emphasized that the protrusions are provided to achieve sufficient contact between the cleaning balls 31 and the inner wall of the heat exchange tube 20 with a minimum amount of material, thereby improving overall washing of scale on the inner wall of the heat exchange tube 20.

Further, as shown in fig. 6 and 7, the discharging assembly 4 further includes a driving unit 40, and the driving unit 40 includes:

the motor 41, the said motor 41 is installed on said stander 11;

one end of the driving shaft 42 is connected with the output end of the motor 41, the other end of the driving shaft 42 is fixedly connected with the rotating disc 25, the driving shaft 42 penetrates through a through groove 43 in the fixed seat 26, the aperture of the through groove 43 is D1, the aperture of the driving shaft 42 is D2, and D1 is greater than D2;

a gear a44, the gear a44 being coaxial with and fixedly connected to the drive shaft 42;

a gear b45, the gear b45 is arranged in meshing with the gear a 44; and

and the rotating shaft 46 is fixedly arranged on the fixed seat 26 and is rotatably arranged with the gear b 45.

In the embodiment, the driving unit 40 is arranged to cooperate with the sewage discharging unit 47 and the water discharging unit 48, so that the driving unit 40 drives the rotating disc 25 to rotate on one hand, and the cleaning balls are reset to the initial working position; in addition, the rotation of the sewage discharge unit 47 and the drainage unit 48 is driven, so that the alternate switching of the sewage discharge and drainage is realized; the two works are driven by one power, so that the dirt in front of the cleaning ball 31 is output through the dirt discharge unit 47, the clean water behind the cleaning ball 31 synchronously drives the dirt discharge unit 47 and the water discharge unit 48 to be switched in the reset action of the cleaning ball 31, the clean water flows out of the water discharge unit 48, the front and back work are closely connected, errors are not easy to occur, and the complete separation of the water scale and the clean water is favorably realized; meanwhile, the additional power is saved, and the production cost is reduced.

In detail, the gear teeth are proportioned at the same time, so that the motor 41 drives the turntable to rotate 180 degrees, and the gear b45 rotates 180 degrees at the same time.

Further, the reaction temperature of the high-temperature pipeline reactor 104 is 230-300 ℃.

Further, the external dimensions of the high temperature pipe reactor 104 were DN800 × 4000.

It is worth mentioning that the jacket of the high temperature pipeline reactor is filled with heat conducting oil.

Further, the static mixer 103 adopts a jacketed structure.

In the embodiment, the static mixer 103 is arranged to preheat the raw materials by using the heat of the reaction materials in a jacket type manner.

Example two

As shown in fig. 9 and 10, the same or corresponding components as those in the first embodiment are denoted by the same reference numerals as those in the first embodiment, and only the differences from the first embodiment will be described below for the sake of convenience. The second embodiment is different from the first embodiment in that:

further, as shown in fig. 9 and 10, the sewage discharging unit 47 and the water discharging unit 48 are water pipes b, which are disposed on the rotating shaft 46 and symmetrically disposed on both sides of the rotating shaft 46, one end of the water discharging unit 48 facing the motor 41 is embedded in one end of the sewage discharging unit 47 facing the motor 41, an outer ring diameter of the water pipe b is a2, an inner ring diameter of the water pipe b is A3, and a2 > a1 > A3.

In this embodiment, through the embedded arrangement of the output part of the blowdown unit 47 and the drainage unit 48, the purpose is to avoid the phenomena of knotting and winding of the blowdown unit 47 and the drainage unit 48 in the rotating process and interfere with the normal operation of the work, and it is worth explaining that the embedded blowdown unit 47 of the drainage unit 48 is a conventional technical means in the field, and only needs to punch the blowdown unit 47 to allow the drainage unit 48 to penetrate, so that the caliber of the blowdown unit 47 is large, and the punched joint can be connected in a sealing manner such as glue.

It is worth mentioning that the purpose of a2 > a1 > A3 is, on the one hand, to allow clean water or scale to flow completely into the water pipe b; on the other hand, the wall thickness of the water pipe b is utilized to limit the cleaning ball.

The working process is as follows:

the method comprises the following steps of pumping raw material butyrolactone into a tee pipeline through a metering pump a at the speed of 300kg/h and pumping raw material n-octylamine into a mixing pump through a metering pump b at the speed of 450kg/h, sending the mixture to a static mixer with a jacket, fully mixing and preheating the mixture, then reacting the mixture through a high-temperature pipeline reactor, heating the high-temperature reactor through heat conduction oil to the temperature of 280 ℃ for reaction, producing a crude product after the material passes through the high-temperature pipeline reactor, sending the crude product to the jacket of a preheater for preheating a raw material mixture, simultaneously cooling the crude product, sending the cooled crude product to a crude product temporary storage tank. The crude product temporary storage tank material is continuously pumped into a light component rectifying tower through a pump, the light component tower is heated through a reboiler a, light component water is continuously separated, heavy components, namely a half product, are sent to a product rectifying tower, the product rectifying tower is heated through a reboiler b and is in high vacuum, products are continuously separated in the product rectifying tower, the product content is 99.2%, and a small amount of high-boiling removal system is adopted.

The specific working materials of the reboiler a enter the shell 15 from the feeding hole 18, the materials are in contact with the heat exchange tube 20 and conduct heat transfer, meanwhile, the water pump and water tank all-in-one machine 22 is started, hot water flows into the heat exchange tube 20 through the water tube a23, meanwhile, the cleaning balls 31 are pushed, the cleaning balls 31 are propped open under the action of water pressure in the moving process of the heat exchange tube 20, meanwhile, scale on the inner wall of the heat exchange tube 20 is washed, the scale is located in front of the cleaning balls 31, clean water is located behind the cleaning balls 31, the scale is discharged from the pollution discharge unit 47, the motor 41 is started, the motor 41 rotates 180 degrees, the cleaning balls 3 are reset to the initial position, meanwhile, the gear b45 rotates 180 degrees, the; the in-process that the clear water flows in heat exchange tube 20, the water of high temperature heats microthermal material, vaporization, and the material of gaseous phase gets into subsequent processing through discharge gate 17:

the specific operation of the reboiler b is the same as that of the reboiler a and will not be described herein.

In the description of the present invention, it is to be understood that the terms "front and back", "left and right", and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for convenience of description and simplification of description, and do not indicate or imply that the equipment or parts referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention.

Of course, in this disclosure, those skilled in the art will understand that the terms "a" and "an" should be interpreted as "at least one" or "one or more," i.e., in one embodiment, a number of an element may be one, and in another embodiment, a number of the element may be plural, and the terms "a" and "an" should not be interpreted as limiting the number.

The above description is only a preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any changes or substitutions that can be easily conceived by those skilled in the art in the technical suggestion of the present invention should be covered within the scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.

Claims (10)

1. A preparation system of octyl pyrrolidone is characterized in that: comprises a first metering pump (101), a second metering pump (102), a static mixer (103), a high-temperature pipeline reactor (104), a crude product temporary storage tank (105), a circulating pump a (106), a light component rectifying tower (107), a reboiler a (108), a circulating pump b (109), a product rectifying tower (110), a reboiler b (111), a cooler a (112), a product groove (113) and a cooler b (114), wherein the first metering pump (101) and the second metering pump (102) are communicated with the static mixer (103) through a tee joint, the static mixer (103) is connected with the high-temperature pipeline reactor (104) through a pipeline, the static mixer (103) is connected with a feed inlet of the crude product temporary storage tank (105), the light component rectifying tower (107) is connected with the crude product temporary storage tank (105) through the circulating pump a (106), and the light component rectifying tower (107) is connected with a feed inlet of the cooler b (114), a circulating pump a (106) is connected with a circulating pump b (109) through a product rectifying tower (110), a cooler a (112) is connected with the product rectifying tower (110), a discharge hole of a reboiler a (108) is connected with a discharge hole of a light component rectifying tower (107) and a feed hole of the reboiler a is connected with a discharge hole of the circulating pump a (106), a discharge hole of the reboiler b (111) is connected with a discharge hole of the product rectifying tower (110) and a feed hole of the reboiler b (111) is connected with a discharge hole of the circulating pump b (109);

the reboiler a (108) and the reboiler b (111) both comprise a main body assembly (1), a water inlet assembly (2) arranged on the main body assembly (1), a cleaning assembly (3) arranged in the main body assembly (1) and a discharge assembly (4) which is communicated with the water inlet assembly (2) and synchronously rotates with the water inlet assembly;

the discharging assembly (4) comprises a sewage discharging unit (47) and a water discharging unit (48), wherein the sewage discharging unit (47) and the water discharging unit (48) are communicated with the water inlet assembly (2) alternately, and the separation work of purified water and sewage is completed.

2. A system for the preparation of octyl pyrrolidone according to claim 1, wherein said main body assembly (1) comprises:

a frame (11); and

the device comprises a device body (12), wherein the device body (12) comprises a shell (15), a flange (16), a discharge hole (17), a feed inlet (18), a tube plate (19) and a heat exchange tube (20).

3. A system for the preparation of octyl pyrrolidone as recited in claim 2, wherein said water intake assembly (2) comprises:

the water supply unit (21) comprises a water pump and water tank integrated machine (22) arranged on the rack (11) and a water pipe a (23) communicated with the water pump and water tank integrated machine (22); and

the control unit (24) comprises a rotary disc (25) which is arranged on one side of the flange (16) and is attached to the flange (16) and a fixed seat (26) which is arranged on one side of the rotary disc (25) and is attached to the rotary disc (25), the rotary disc (25) is rotatably arranged on the rack (11), and the fixed seat (26) is fixedly arranged on the rack (11);

the flange (16), the rotary table (25) and the fixed seat (26) are coaxially arranged, and the rotary table (25) is arranged in the middle.

4. The octyl pyrrolidone preparation system of claim 3, wherein the flange (16) and the fixed seat (26) are both provided with through holes a (27) and are symmetrically arranged relative to the rotary table (25), and the through holes a (27) of the fixed seat (26) are communicated with the water pipe a (23);

the flange (16) and the fixed seat (26) are respectively provided with a through hole b (28) and are symmetrically arranged relative to the rotary table (25), the through holes a (27) and the through holes b (28) are linearly arranged along the diameter direction, and the through holes b (28) of the fixed seat (26) are communicated with the discharge assembly (4);

the turntable (25) is provided with a through hole c (29) and a through hole d (30), and the through hole c (29) and the through hole d (30) are respectively communicated with the through hole a (27) and the through hole b (28) in an interrupted manner;

the aperture sizes of the through hole a (27), the through hole b (28), the through hole c (29) and the through hole d (30) are the same, and all the aperture sizes are A1.

5. A system for the preparation of octyl pyrrolidone according to claim 1, wherein said cleaning assembly (3) comprises:

the cleaning ball (31) is cylindrical and is arranged in a flexible material structure, two ends of the cleaning ball (31) are arranged in a hollow mode, and the middle of the cleaning ball (31) is arranged in a solid mode;

the bumps (32) are uniformly distributed on the side surface of the cleaning ball (31) and penetrate through the cleaning ball, two bumps (32) which are vertically adjacent in the height direction of the cleaning ball (31) are arranged in a staggered mode, the distance between the two bumps (32) which are adjacent in the height vertical direction of the cleaning ball (31) is L1, the width of each bump (32) is L2, L1 is L2, and the bottom of the part, located inside the cleaning ball (31), of each bump (32) is provided with a chamfer; and

top supporting unit (33), top supporting unit (33) are along central line symmetry on clean ball (31) length sets up the upper and lower bottom surface of clean ball (31), and it sets up including removing clean ball (31) inside and with bump (32) bottom surface matching set up toper post (34), symmetry set up connecting plate (35) and one end of toper post (34) bottom surface and connecting plate (35) connect the setting and the other end with spring (36) that set up are connected to clean ball (31) bottom.

6. A system for the preparation of octyl pyrrolidone according to claim 4, wherein said expelling assembly (4) further comprises a driving unit (40), said driving unit (40) comprising:

a motor (41), the motor (41) being mounted on the frame (11);

one end of the driving shaft (42) is connected with the output end of the motor (41), the other end of the driving shaft (42) is fixedly connected with the rotating disc (25), the driving shaft (42) penetrates through a through groove (43) in the fixed seat (26), the caliber of the through groove (43) is D1, the caliber of the driving shaft (42) is D2, and D1 is larger than D2;

a gear a (44), wherein the gear a (44) is coaxial with and fixedly connected with the driving shaft (42);

a gear b (45), wherein the gear b (45) is meshed with the gear a (44); and

the rotating shaft (46) is fixedly arranged on the fixed seat (26) and is rotatably arranged with the gear b (45).

7. A preparation system of octyl pyrrolidone according to claim 6, wherein said pollution discharging unit (47) and said water discharging unit (48) are water pipes b, which are disposed on said rotating shaft (46) and symmetrically disposed on both sides of said rotating shaft (46), said water discharging unit (48) is embedded in said pollution discharging unit (47) toward said motor (41) at one end of said motor (41), and the diameter of the outer ring of said water pipe b is A2, the diameter of the inner ring is A3, A2 > A1 > A3.

8. The system as claimed in claim 1, wherein the reaction temperature of the high temperature pipeline reactor (104) is 230-300 ℃.

9. A system for the production of octyl pyrrolidone as recited in claim 1, wherein said high temperature pipeline reactor (104) has an external dimension of DN800 x 4000.

10. A system for preparing octyl pyrrolidone according to claim 1, wherein the static mixer (103) is of jacketed type.

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