Methylamine extractive distillation tower

Abstract

The utility model is suitable for the technical field of chemical engineering, and provides a methylamine extractive distillation tower which comprises a base, the tower body is fixedly mounted on the base, one side of the tower body is fixedly communicated with an extracting agent inlet pipe and a raw material liquid inlet pipe respectively, two sub-spraying plates are arranged in the tower body and correspond to the extracting agent inlet pipe and the raw material liquid inlet pipe respectively, a plurality of tower plates are arranged in the tower body, and the tower plates are connected with the extracting agent inlet pipe and the raw material liquid inlet pipe respectively. The plurality of tower plates are respectively positioned under the two sub-spraying plates; the waste heat recovery mechanism is arranged on the base and is used for recovering waste heat gas in the tower body to preheat raw material liquid. According to the methylamine extractive distillation tower provided by the scheme, waste heat in the production process can be recycled, the energy utilization efficiency is improved, the production cost is reduced, and efficient, environment-friendly and sustainable methylamine extractive distillation production is realized.

Description

TECHNICAL FIELD

[0001] The utility model belongs to chemical technology field especially relates to methylamine extraction rectification tower. BACKGROUND

[0002] Methylamine is one of important organic chemical raw materials, has extensive application in chemical industry, pharmacy, pesticide and so on, the production process of methylamine usually includes the reaction of methyl alcohol and ammonia under the condition of catalyst, generates the mixed crude product of monomethylamine, dimethylamine, trimethylamine, in order to obtain high purity methylamine product, needs separating and purifying to mixed crude product, in this process, methylamine extraction distillation tower plays the key role.

[0003] Extraction rectification is a kind of separation process by adding solvent in raw material liquid, changes the relative volatility between original components, in extraction rectification process, a large amount of waste heat will be produced, and the waste heat in the existing extraction rectification is generally discharged to the environment, causing energy waste. UTILITY MODEL CONTENTS

[0004] The utility model provides methylamine extraction rectification tower, aims at solving the problem that the existing extraction rectification in the background art proposed above will discharge the waste heat generated in extraction rectification process directly to the environment, causes energy waste.

[0005] To solve the above problems, the utility model is realized as follows, methylamine extraction rectification tower, including: base;Tower body, the tower body is fixedly installed on the base, one side of the tower body is respectively fixedly connected with extraction agent inlet pipe and raw material liquid inlet pipe, two baffle plates are equipped in the tower body, two baffle plates correspond to the extraction agent inlet pipe and raw material liquid inlet pipe respectively, a plurality of tower plates are equipped in the tower body, and a plurality of tower plates are located below two baffle plates respectively;Waste heat recovery mechanism, the waste heat recovery mechanism is equipped on the base, and is used for recycling the waste heat gas in the tower body to preheat raw material liquid.

[0006] Preferably, the waste heat recovery mechanism includes waste heat discharge pump, air inlet pipe, exhaust pipe, storage tank, filter box, activated carbon adsorption plate and filter cloth, the waste heat discharge pump is fixedly installed on one side of the tower body, the air inlet end and exhaust end of the air inlet pipe are fixedly connected on the waste heat discharge pump of the tower body, the air inlet end of the exhaust pipe is fixedly connected on the exhaust end of the waste heat discharge pump, the storage tank is fixedly installed on the base and is used for storing raw material liquid, the storage tank is communicated with the exhaust pipe, the filter box is equipped on the exhaust pipe, the activated carbon adsorption plate is equipped in the filter box, and the filter cloth is laid on the activated carbon adsorption plate.

[0007] Preferably, the storage tank is fixedly installed with the support on the inner wall of both sides, and the storage box is arranged on the two supports.

[0008] Preferably, a reboiler is fixedly installed on the base, a tower bottom extraction pump is fixedly installed on the base, an extraction pipe and an injection pipe are fixedly communicated with an entering end and an discharging end of the tower bottom extraction pump respectively, and the extraction pipe and the injection pipe are communicated with the bottom of the tower body and the reboiler respectively.

[0009] Preferably, a circulating pump is fixedly installed on one side of the tower body, an outlet pipe and a reflux pipe are fixedly communicated with an entering end and a discharging end of the circulating pump respectively, and the outlet pipe and the reflux pipe are communicated with the reboiler and the tower body respectively.

[0010] Preferably, a condenser is fixedly installed on the base, a steam discharging pipe is fixedly communicated with the top of the tower body, and the steam discharging pipe is communicated with the condenser.

[0011] Preferably, a receiver for collecting condensed liquid is fixedly installed on the base, and the receiver is communicated with the condenser.

[0012] Compared with the related art, the methylamine extractive rectification tower has the following beneficial effects:

[0013] Compared with the prior art, the methylamine extractive rectification tower provided by the scheme realizes efficient, environmentally-friendly and sustainable methylamine extractive rectification production as a whole, significantly improves the efficiency and environmental protection performance of methylamine extractive rectification, reduces energy consumption and improves resource utilization rate through the integrated process and the efficient energy recovery and reuse mechanism, realizes the green and sustainable production target, further improves the separation effect and product quality of extractive rectification by optimizing the circulation and stable control of liquid in the tower, and provides a more reliable and efficient production solution for users. BRIEF DESCRIPTION OF DRAWINGS

[0014] Figure 1 is a front view structural schematic diagram of the methylamine extractive rectification tower provided by the utility model;

[0015] Figure 2 is a front view structural schematic diagram of the methylamine extractive rectification tower provided by the utility model;

[0016] Figure 3 is Figure 2 is an enlarged structural schematic diagram of part A shown in Fig.

[0017] Reference signs: 1, base; 2, tower body; 3, extractant inlet pipe; 4, raw material liquid inlet pipe; 5, shower plate; 6, tray; 7, waste heat discharge pump; 8, air inlet pipe; 9, air outlet pipe; 10, storage box; 11, filter box; 12, activated carbon adsorption plate; 13, filter cloth; 14, support; 15, storage box; 16, reboiler; 17, tower bottom extraction pump; 18, extraction pipe; 19, injection pipe; 20, circulating pump; 21, outlet pipe; 22, reflux pipe; 23, condenser; 24, steam discharge pipe; 25, receiver. DETAILED DESCRIPTION

[0018] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs; the terminology used in the description herein is for describing particular embodiments only and is not intended to be limiting of the application; the description and claims herein and the above description of drawings herein utilize terms such as "including" and "having" and variations thereof that are intended to be broad and encompass the terms "consisting of" and "consisting essentially of." The terms "first," "second," and the like, as used herein do not denote any order, quantity, or importance, but rather are used to distinguish one element from another. The terms "inner," "outer," "left," "right," "front," "rear," "up," "down," "over," "under," and the like as used herein are described by terms of relative positions based on as shown in the drawings. These relative position terms are used only for convenience and are not necessarily carried into effect. Therefore, they cannot be understood as limitations to the utility model.

[0019] Reference herein to "an embodiment" means that a particular feature, structure, or characteristic described in connection with the embodiment can be included in at least one embodiment of the application. The appearances of the phrase in various places in the specification are not necessarily all referring to the same embodiment, nor are they necessarily mutually exclusive or alternative embodiments. It is expressly understood that the embodiments described herein are combinable.

[0020] The utility model embodiment provides methylamine extractive rectification tower, as shown in the drawing, methylamine extractive rectification tower includes: base 1, tower body 2, tower body 2 is fixedly installed on base 1, one side of tower body 2 is fixedly connected with extractant inlet pipe 3 and raw material liquid inlet pipe 4 respectively, two shower plates 5 are equipped in tower body 2, two shower plates 5 correspond to extractant inlet pipe 3 and raw material liquid inlet pipe 4 respectively, a plurality of trays 6 are equipped in tower body 2, and a plurality of trays 6 are located below two shower plates 5 respectively. Figures 1-3 Waste heat recovery mechanism is equipped on base 1, and is used to recycle waste heat gas in tower body 2 to preheat raw material liquid.

[0021] In this embodiment, the base 1 is fixedly installed on the ground or other foundation as the supporting structure of the entire methylamine extractive rectification tower, the tower body 2 is the main part of the methylamine extractive rectification, and the extractive rectification process is carried out in the inside. The tower body 2 is fixedly installed on the base 1 and fixedly communicated with the extractant inlet pipe 3 and the raw material liquid inlet pipe 4, and the extractive rectification process is carried out, so that the components are effectively separated in the tower. The extractant inlet pipe 3 and the raw material liquid inlet pipe 4 are respectively used for introducing the extractant and the raw material liquid into the tower body, so as to provide necessary material input for the extractive rectification process and ensure the smooth progress of the process. The distribution plate 5 is arranged in the tower body and corresponds to the extractant inlet pipe 3 and the raw material liquid inlet pipe 4, and is used for uniformly distributing the materials, so that the extractant and the raw material liquid are uniformly distributed in the tower, the extraction efficiency and the separation effect are improved. The tray 6 is arranged directly below the two distribution plates 5, and a plurality of trays 6 are arranged in the tower body 2, which are used for providing gas-liquid contact interfaces, promoting the mass transfer and heat transfer between the components, enhancing the extractive rectification effect, and improving the product quality and the separation efficiency. The waste heat recovery mechanism is arranged on the base 1 and is used for recovering the waste heat gas in the tower body 2, and the recovered heat is used for preheating the raw material liquid, so that the problem of energy waste caused by direct discharge of waste heat in the traditional extractive rectification process is effectively solved, the energy utilization efficiency is improved, and the production cost is reduced.

[0022] In the further preferred embodiment of the utility model, the waste heat recovery mechanism comprises a waste heat discharge pump 7, an air inlet pipe 8, an air outlet pipe 9, a storage box 10, a filter box 11, an activated carbon adsorption plate 12 and filter cloth 13, the waste heat discharge pump 7 is fixedly installed on one side of the tower body 2, the air inlet end and the air outlet end of the air inlet pipe 8 are fixedly communicated on the waste heat discharge pump 7 of the tower body 2, the air inlet end of the air outlet pipe 9 is fixedly communicated on the air outlet end of the waste heat discharge pump 7, the storage box 10 is fixedly installed on the base 1 and is used for storing raw material liquid, the storage box 10 is communicated with the air outlet pipe 9, the filter box 11 is arranged on the air outlet pipe 9, the activated carbon adsorption plate 12 is arranged in the filter box 11, and the filter cloth 13 is arranged on the activated carbon adsorption plate 12.

[0023] In the embodiment, the waste heat exhaust pump 7 is fixedly installed on one side of the tower body 2, used for exhausting the waste heat gas in the tower body, providing power for the waste heat recovery process, and ensuring that the waste heat gas can be effectively exhausted and recovered; the gas inlet end and the gas outlet end of the gas inlet pipe 8 are fixedly communicated with the tower body 2 and the waste heat exhaust pump 7 respectively, used for guiding the waste heat gas in the tower body into the waste heat exhaust pump, realizing effective transmission of the waste heat gas, and ensuring that the waste heat can be smoothly exhausted and sent into the recovery system; the gas inlet end of the gas outlet pipe 9 is fixedly communicated with the gas outlet end of the waste heat exhaust pump 7 and is communicated with the storage tank 10, used for guiding the waste heat gas subjected to recovery treatment into the storage tank 10, preheating the raw material liquid, realizing reuse of the waste heat gas, and transferring the recovered heat to the raw material liquid, improving energy utilization efficiency; the filter box 11 is arranged on the gas outlet pipe 9, used for filtering the waste heat gas, removing impurities and pollutants in the waste heat gas, and ensuring that the waste heat gas entering the storage tank 10 is pure and will not pollute the raw material liquid; the activated carbon adsorption plate 12 is arranged in the filter box 11, used for adsorbing harmful substances in the waste heat gas, improving filtering effect, effectively removing harmful gas and impurities in the waste heat gas, and ensuring that the recovered waste heat gas is safe and usable; and the filter cloth 13 is arranged on the activated carbon adsorption plate 12, used for further filtering the waste heat gas.

[0024] In the further preferable embodiment of the utility model, the storage tank 10 is fixedly installed with a support 14 on the inner wall of both sides, and the two supports 14 are provided with a storage box 15.

[0025] In the embodiment, the support 14 is fixedly installed on the inner wall of both sides of the storage tank 10, providing stable support for the storage box 15, ensuring that the position of the storage box 15 in the storage tank 10 is fixed and not easy to shake or tip over, and the storage box 15 is arranged on the two supports 14 and located in the storage tank 10, used for storing the raw material liquid, facilitating quick taking out of the preheated raw material liquid.

[0026] In the further preferable embodiment of the utility model, the base 1 is fixedly installed with a reboiler 16, and the base 1 is fixedly installed with a tower bottom exhaust pump 17, and the entering end and the discharging end of the tower bottom exhaust pump 17 are fixedly communicated with an exhaust pipe 18 and an injection pipe 19 respectively, and the exhaust pipe 18 and the injection pipe 19 are communicated with the bottom of the tower body 2 and the reboiler 16 respectively.

[0027] In the embodiment, the reboiler 16 is fixedly installed on the base 1 and communicates with the injection pipe 19, the reboiler 16 is used for heating the liquid drawn from the bottom of the tower, and part of the liquid is vaporized and returned to the tower, so that the required steam is provided for the extractive rectification process, the temperature and pressure balance in the tower are maintained, and the smooth progress of the extractive rectification process is ensured, and the tower bottom draw pump 17 is fixedly installed on the base 1, the inlet end and the outlet end of the tower bottom draw pump 17 are communicated with the bottom of the tower body 2 and the reboiler 16 through the draw pipe 18 and the injection pipe 19 respectively, and the tower bottom draw pump 17 is used for drawing the liquid accumulated at the bottom of the tower and sending the liquid into the reboiler 16 for heating through the injection pipe 19, which helps to maintain the flow and circulation of the liquid in the tower, ensures the continuity and stability of the extractive rectification process, and meanwhile, the use of the draw pump can improve the production efficiency and reduce the operation difficulty.

[0028] In the further preferred embodiment of the utility model, one side of the tower body 2 is fixedly installed with a circulating pump 20, the inlet end and the outlet end of the circulating pump 20 are fixedly communicated with an outlet pipe 21 and a reflux pipe 22 respectively, and the outlet pipe 21 and the reflux pipe 22 are communicated with the reboiler 16 and the tower body 2 respectively.

[0029] In the embodiment, the circulating pump 20 is fixedly installed on one side of the tower body 2, the inlet end and the outlet end of the circulating pump 20 are communicated with the reboiler 16 and the tower body 2 through the outlet pipe 21 and the reflux pipe 22 respectively, the outlet pipe 21 is fixedly communicated with the inlet end of the circulating pump 20 and communicated with the reboiler 16, the outlet pipe 21 is used for drawing part of the vaporized liquid in the reboiler 16 after heating and sending the liquid into the circulating pump 20 for further treatment, which helps to maintain the stability of the liquid amount and temperature in the reboiler 16, ensures the continuity and stability of the extractive rectification process, and the reflux pipe 22 is fixedly communicated with the outlet end of the circulating pump 20 and communicated with the tower body 2, the reflux pipe 22 is used for sending the liquid driven by the circulating pump 20 back into the tower body 2.

[0030] In the further preferred embodiment of the utility model, the base 1 is fixedly installed with a condenser 23, the top of the tower body 2 is fixedly communicated with a steam discharge pipe 24, and the steam discharge pipe 24 is communicated with the condenser 23.

[0031] In the embodiment, the condenser 23 is fixedly installed on the base 1 and communicated with the steam discharge pipe 24, and the condenser 23 is used for condensing the steam discharged from the top of the tower body 2 and converting the steam into liquid, which helps to recover valuable substances and reduce resource waste.

[0032] In the further preferred embodiment of the utility model, the base 1 is fixedly installed with a receiver 25 used for collecting the liquid after condensation, and the receiver 25 is communicated with the condenser 23.

[0033] In this embodiment, the receiver 25 is fixedly installed on the base 1 and is in communication with the condenser 23, and the main function of the receiver 25 is to receive and store the liquid condensed from the condenser 23, and to collect the raw material liquid after extraction rectification for subsequent use.

[0034] In summary, compared with related technologies, the device as a whole realizes efficient, environmentally friendly and sustainable production of methylamine through extraction rectification, significantly improving the efficiency and environmental performance of methylamine extraction rectification. Through the integrated process and efficient energy recovery and reuse mechanism, not only the energy consumption is reduced, but also the resource utilization rate is improved, realizing the green and sustainable production goal. At the same time, through the optimization of the circulation and stable control of the liquid in the tower, the separation effect and product quality of the extraction rectification are further improved, providing users with more reliable and efficient production solutions.

[0035] In several embodiments provided in the present application, it should be understood that the disclosed device can be implemented in other ways.

[0036] The above embodiments are only used to illustrate the technical solutions of the present application, and not to limit the protection scope of the present application. Obviously, the described embodiments are only some of the embodiments of the present application, not all the embodiments. Based on these embodiments, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of the present application. Although the present application has been described in detail with reference to the above embodiments, those skilled in the art can combine, add or delete the features of the embodiments according to the circumstances without creative labor, so as to obtain different, but essentially not deviating from the concept of the present application. Other technical solutions, which also belong to the scope of protection of the present application.

Claims

1. A methylamine extractive distillation column, characterized in that, include: Base; The tower body is fixedly installed on the base. One side of the tower body is fixedly connected to an extractant inlet pipe and a raw material inlet pipe. The tower body is provided with two dividing plates, which are respectively opposite to the extractant inlet pipe and the raw material inlet pipe. The tower body is provided with multiple trays, which are respectively located directly below the two dividing plates. Waste heat recovery mechanism, which is located on the base, is used to recover waste heat gas in the tower to preheat the raw material liquid.

2. The methylamine extractive distillation column as described in claim 1, characterized in that, The waste heat recovery mechanism includes a waste heat discharge pump, an inlet pipe, an outlet pipe, a storage tank, a filter box, an activated carbon adsorption plate, and a filter cloth. The waste heat discharge pump is fixedly installed on one side of the tower body. The inlet and outlet ends of the inlet pipe are respectively fixedly connected to the waste heat discharge pump on the tower body. The inlet end of the outlet pipe is fixedly connected to the outlet end of the waste heat discharge pump. The storage tank is fixedly installed on the base and is used to store the raw material liquid. The storage tank is connected to the outlet pipe. The filter box is located on the outlet pipe. The activated carbon adsorption plate is located inside the filter box. The filter cloth is laid on the activated carbon adsorption plate.

3. The methylamine extractive distillation column as described in claim 2, characterized in that, The storage box has brackets fixedly installed on both inner walls, and storage boxes are mounted on the two brackets.

4. The methylamine extractive distillation column as described in claim 1, characterized in that, A reboiler is fixedly installed on the base, and a bottom extraction pump is fixedly installed on the base. The inlet and outlet of the bottom extraction pump are respectively connected to an extraction pipe and an injection pipe. The extraction pipe and the injection pipe are respectively connected to the bottom of the column and the reboiler.

5. The methylamine extractive distillation column as described in claim 4, characterized in that, A circulation pump is fixedly installed on one side of the tower body. The inlet and outlet ends of the circulation pump are respectively connected to an outlet pipe and a reflux pipe. The outlet pipe and the reflux pipe are respectively connected to the reboiler and the tower body.

6. The methylamine extractive distillation column as described in claim 1, characterized in that, A condenser is fixedly installed on the base, and a steam discharge pipe is fixedly connected to the top of the tower body. The steam discharge pipe is connected to the condenser.

7. The methylamine extractive distillation column as described in claim 6, characterized in that, A receiver for collecting condensed liquid is fixedly installed on the base, and the receiver is connected to the condenser.

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