CN219167766U

CN219167766U - Multistage extraction system is used in diethoxymethane production

Info

Publication number: CN219167766U
Application number: CN202223507421.2U
Authority: CN
Inventors: 沈建成; 杨波; 王成城
Original assignee: Gansu Meirun New Material Technology Co ltd
Current assignee: Gansu Meirun New Material Technology Co ltd
Priority date: 2022-12-27
Filing date: 2022-12-27
Publication date: 2023-06-13
Anticipated expiration: 2032-12-27

Abstract

The utility model provides a multistage extraction system is used in diethoxymethane production, including primary extraction tower, primary feed tank, secondary extraction tower, alkaline wash extraction tower, the storage tank, there is primary mixer in the middle section import of primary extraction tower through the pipeline intercommunication, the hypomere import has primary feed mixer through the pipeline intercommunication, the upper segment import is through pipeline and primary intake tank intercommunication, the discharge gate passes through the pipeline and is connected with the feed inlet of primary feed tank, the discharge gate of primary feed tank passes through the pipeline and is connected with the feed inlet of secondary feed mixer, the discharge gate of secondary feed mixer and the lower feed inlet intercommunication of secondary extraction tower, the discharge gate of secondary extraction tower passes through pipeline and the lower feed inlet intercommunication of alkaline wash extraction tower, the last feed inlet of alkaline wash extraction tower passes through pipeline and secondary feed tank intercommunication, the discharge gate communicates with the storage tank. The utility model not only improves the purity of the diethoxymethane product, but also removes the water in the product by alkali washing.

Description

Multistage extraction system is used in diethoxymethane production

Technical Field

The utility model relates to the technical field of diethoxymethane production, in particular to a multistage extraction system for diethoxymethane production.

Background

Diethoxymethane (DEM) is widely used in organic synthesis, and can be used not only as a solvent in organic synthesis, a solvent in a battery, a fuel additive, and the like, but also as a reagent for organic reaction, such as an ethoxymethylating reagent, an equivalent of formaldehyde, a substrate for carbonylation, a source of ethanol, and the like. In recent years, domestic production and demand increase are faster, and particularly, a high-quality diethoxymethane product is more in short supply. In the prior art, most of diethoxymethane extraction equipment is primary extraction, production systems related to alkali extraction are fewer, and the phenomena of low product yield, excessive impurities, excessive water content and the like exist. Therefore, the utility model provides a diethoxymethane multistage extraction system with high product yield, less impurities and low water content.

Disclosure of Invention

Aiming at the technical problems, the utility model aims to provide a multistage extraction system for diethoxymethane production, which has high product yield, less impurities and low water content

In order to solve the technical problems, the adopted technical scheme is as follows: the utility model provides a multistage extraction system is used in diethoxymethane production, includes primary extraction tower, primary feed tank, secondary extraction tower, alkaline wash extraction tower, storage tank, there is primary feed mixer in the middle section import of primary extraction tower through the pipeline intercommunication, lower segment import has primary feed mixer, upper segment import through pipeline and primary intake tank intercommunication, the discharge gate through the pipeline with the feed inlet of primary feed tank is connected, the discharge gate of primary feed tank is connected with the feed inlet of secondary feed mixer through the pipeline, the discharge gate of secondary feed mixer with the lower feed inlet intercommunication of secondary extraction tower, the discharge gate of secondary extraction tower through the pipeline with the lower feed inlet intercommunication of alkaline wash extraction tower, the upper feed inlet of alkaline wash extraction tower through pipeline and secondary feed tank intercommunication, discharge gate and storage tank intercommunication.

Further, the primary mixer and the primary feeding mixer are connected with the raw material inlet, the water inlet of the secondary water inlet tank is communicated with the soft water pipe, the discharge port of the storage tank is communicated with the material outlet through a pipeline, and the water inlet of the primary mixer is also communicated with the primary water inlet tank.

Further, the water inlet of the secondary water inlet tank is communicated with the soft water pipe through a ball float valve.

Further, a solid alkali feeding port is formed in the top of the alkaline washing extraction tower, and an alkali liquor barrel is communicated with a discharging port at the bottom of the alkaline washing extraction tower.

Further, a secondary feed pump is arranged on a pipeline between the primary feed tank and the secondary feed mixer, a discharge pump is arranged on a pipeline between the storage tank and the material outlet, a secondary water inlet pump is arranged on a pipeline between the secondary feed tank and the alkaline washing extraction tower, and a primary water inlet pump is arranged on a pipeline between the primary water inlet tank and the primary mixer.

Further, the secondary water inlet pump is communicated with the water injection port of the primary water inlet tank.

Further, the tail gas outlet of the primary extraction tower, the tail gas outlet of the primary water inlet tank, the tail gas outlet of the primary feeding tank, the tail gas outlet of the secondary extraction tower and the tail gas outlet of the storage tank are all connected with a tail gas pipeline; the nitrogen inlet of the primary water inlet tank, the nitrogen inlet of the primary feed tank and the nitrogen inlet of the storage tank are all connected with a nitrogen main pipe.

Compared with the prior art, the utility model has the following advantages:

1. the utility model is connected with the primary extraction tower, the primary feed tank, the secondary extraction tower, the alkaline washing extraction tower and the storage tank in series, through multistage extraction and alkaline washing extraction, the product purity of diethoxymethane is improved, and the water in the product is removed through alkaline washing, and the primary mixer and the primary feed mixer are arranged in front of the primary extraction tower, so that raw materials can be fully mixed before extraction, the volume of the primary extraction tower is reduced, the extraction efficiency is improved, the primary feed tank is arranged behind the primary extraction tower, raw materials can be uniformly provided for the secondary extraction tower, the extraction stability is improved, and the secondary feed tank is arranged, so that a water source can be stably provided for the alkaline washing extraction tower.

2. The secondary water inlet tank is communicated with the soft water pipe, so that the impurity is prevented from entering the reaction, the purity of the product is improved, and the ball float valve is arranged on the water inlet of the secondary water inlet tank, so that automatic water control can be realized, and the waste of water resources is avoided.

3. The upper part of the alkaline washing extraction tower is provided with the solid alkali feeding port, and the lower part of the alkaline washing extraction tower is communicated with the alkali liquor barrel, so that the alkali adding efficiency is improved, and meanwhile, the environmental pollution is avoided.

4. The utility model is provided with a plurality of water pumps and material pumps, thereby improving the smoothness of material conveying.

5. According to the utility model, the valves are arranged between all the devices and the pipelines, so that the controllability of the system is improved.

Drawings

FIG. 1 is a schematic diagram of the connection relationship of the present utility model.

Wherein: 1. primary mixer, 2, primary feed mixer, 3, primary extraction tower, 4, primary feed tank, 5, secondary feed mixer, 6, secondary extraction tower, 7, alkaline wash extraction tower, 8, alkali liquor barrel, 9, discharge pump, 10, storage tank, 11, secondary water inlet pump, 12, secondary water inlet tank, 12a, ball float valve, 13, secondary feed pump, 14, primary water inlet tank, 15, primary water inlet pump, A, raw material inlet, B, water hose, C, material outlet, a, tail gas pipeline, B, nitrogen manifold.

Detailed Description

The following description of the embodiments of the present utility model will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present utility model, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.

The multistage extraction system for diethoxymethane production as shown in fig. 1 comprises a primary extraction tower 3, a primary feed tank 4, a secondary extraction tower 6, an alkaline wash extraction tower 7 and a storage tank 10, wherein a middle section inlet of the primary extraction tower 3 is communicated with the primary mixer 1 through a pipeline, a lower section inlet is communicated with the primary feed mixer 2 through a pipeline, an upper section inlet is communicated with a primary water inlet tank 14 through a pipeline, a discharge port is connected with a feed port of the primary feed tank 4 through a pipeline, a discharge port of the primary feed tank 4 is connected with a feed port of the secondary feed mixer 5 through a pipeline, a discharge port of the secondary feed mixer 5 is communicated with a lower feed port of the secondary extraction tower 6, a discharge port of the secondary extraction tower 6 is communicated with a lower feed port of the alkaline wash extraction tower 7 through a pipeline, an upper feed port of the alkaline wash extraction tower 7 is communicated with the secondary feed tank 12 through a pipeline, and a discharge port is communicated with the storage tank 10.

In order to avoid the pollution of the product by impurities in the water, the primary mixer 1 and the primary feeding mixer 2 are connected with the raw material inlet A, the water inlet of the secondary water inlet tank 12 is communicated with the water hose B, the discharge port of the storage tank 10 is communicated with the material outlet C through a pipeline, and the water inlet of the primary mixer 1 is also communicated with the primary water inlet tank 14.

Wherein the material outlet C is a material inlet of refining process equipment.

In order to prevent water from overflowing, the water inlet of the secondary water inlet tank 12 is communicated with the water hose B through a ball float valve 12 a.

In order to prevent the alkali liquor from leaking out and polluting the environment, a solid alkali feeding port is arranged at the top of the alkali washing extraction tower 7, and an alkali liquor barrel 8 is communicated with a discharging port at the bottom.

In order to facilitate material circulation, a secondary feed pump 13 is arranged on a pipeline between the primary feed tank 4 and the secondary feed mixer 5, a discharge pump 9 is arranged on a pipeline between the storage tank 10 and the material outlet C, a secondary water inlet pump 11 is arranged on a pipeline between the secondary water inlet tank 12 and the alkaline washing extraction tower 7, and a primary water inlet pump 15 is arranged on a pipeline between the primary water inlet tank 14 and the primary mixer 1.

In order to facilitate mixing, the secondary water inlet pump 11 is communicated with a water injection port of the primary water inlet tank 14.

In order to prevent pollution to products and environment, a tail gas outlet of the primary extraction tower 3, a tail gas outlet of the primary water inlet tank 14, a tail gas outlet of the primary feed tank 4, a tail gas outlet of the secondary extraction tower 6 and a tail gas outlet of the storage tank 10 are connected with a tail gas pipeline a; the nitrogen inlet of the primary water inlet tank 14, the nitrogen inlet of the primary feed tank 4 and the nitrogen inlet of the storage tank 10 are all connected with the nitrogen main pipe b.

Wherein, all the pipelines between the devices mentioned in the specification are provided with valves.

The specific working process of the utility model is as follows:

during operation, the material (1 # coarse DEM) through depolymerization and reactive distillation enters the primary mixer 1 and the primary material mixer 2 through the material inlet A, water in the primary water inlet tank 14 is introduced into the upper parts of the primary mixer 1 and the primary extraction tower 3 through the primary water inlet pump 15, water and the material in the primary mixer 1 are mixed and enter the lower part of the primary extraction tower 3, the primary material mixer 2 is used for uniformly mixing the material (preventing layering of the raw material in pipeline transportation) and then conveying the material to the middle part of the primary extraction tower 3, the primary water inlet pump 15 is used for conveying the water in the primary water inlet tank 14 to the upper part of the primary extraction tower 3 for primary extraction operation, the material generated in the primary extraction tower 3 is conveyed to the primary feed tank 4 for temporary storage, and then is conveyed to the secondary extraction tower 6 through the secondary feed pump 13 for secondary extraction operation, at this time, the secondary feed mixer 5 is used for uniformly mixing the layered material stored by the primary feed tank 4, the upper oily substance after extraction of the secondary extraction tower 6 is conveyed to the alkaline wash extraction tower 7 through a pipeline, after alkaline wash extraction is conveyed to the storage tank 10 and then conveyed to the refining equipment through the outlet C9; in the process, soft water pipe B supplements soft water to the secondary water inlet tank 12, the float valve 12a prevents water from overflowing, and soft water in the secondary water inlet tank 12 supplements soft water to the primary water inlet tank 14 and the alkaline washing extraction tower 7 through the secondary water inlet pump 11; when the alkaline washing extraction tower 7 works, flake caustic soda is added from the upper solid caustic soda feed inlet, and waste lye is sent to the lye bucket 8 for temporary storage; in the whole extraction process, the tail gas is conveyed to a tail gas pipeline a for centralized treatment by a primary extraction tower 3, a primary water inlet tank 14, a primary feed tank 4 and a storage tank 10 of a secondary extraction tower 6, and nitrogen is introduced into the primary water inlet tank 14, the primary feed tank 4 and the storage tank 10 through a nitrogen main pipe b for protection.

The mixer, feed mixer, extraction tower, feed tank, caustic wash extraction tower, discharge pump etc. that appear in this paper are all conventional known equipment in the chemical industry production, and its theory of operation is the technique of current disclosure, and this application is the protection to the extraction system in the diethoxymethane production technology, does not have the apparent improvement to above-mentioned equipment body, so its principle is not described in this text.

It should be noted that the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising one … …" does not exclude the presence of other like elements in a process, method, article, or apparatus that comprises the element.

Although embodiments of the present utility model have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made therein without departing from the principles and spirit of the utility model, the scope of which is defined in the appended claims and their equivalents.

Claims

1. A multistage extraction system for diethoxymethane production is characterized in that: including once extraction tower (3), once feeding jar (4), secondary extraction tower (6), alkaline wash extraction tower (7), storage tank (10), the middle section import of once extraction tower (3) has a blender (1) through the pipeline intercommunication, the lower extreme import has a feeding blender (2) through the pipeline intercommunication, upper segment import through pipeline and a intake groove (14) intercommunication, the discharge gate through the pipeline with the feed inlet of once feeding jar (4) is connected, the discharge gate of once feeding jar (4) is connected with the feed inlet of secondary feed blender (5) through the pipeline, the discharge gate of secondary feed blender (5) with the lower feed inlet intercommunication of secondary extraction tower (6), the discharge gate of secondary extraction tower (6) through the pipeline with the lower feed inlet intercommunication of alkaline wash extraction tower (7), the upper feed inlet of alkaline wash extraction tower (7) through pipeline and secondary feed tank (12) intercommunication, discharge gate and storage tank (10) intercommunication.

2. A multistage extraction system for diethoxymethane production as claimed in claim 1, wherein: the primary mixer (1) and the primary feeding mixer (2) are connected with a raw material inlet (A), a water inlet of the secondary water inlet tank (12) is communicated with a soft water pipe (B), a discharge hole of the storage tank (10) is communicated with a material outlet (C) through a pipeline, and a water inlet of the primary mixer (1) is also communicated with the primary water inlet tank (14).

3. A multistage extraction system for diethoxymethane production as claimed in claim 2, wherein: the water inlet of the secondary water inlet tank (12) is communicated with the soft water pipe (B) through a ball float valve (12 a).

4. A multistage extraction system for diethoxymethane production as claimed in claim 1, wherein: the top of the alkaline washing extraction tower (7) is provided with a solid alkaline feed inlet, and the bottom discharge outlet is communicated with an alkaline liquor barrel (8).

5. A multistage extraction system for diethoxymethane production as claimed in claim 3, wherein: be provided with secondary charge pump (13) on the pipeline between primary feed tank (4) with secondary feed mixer (5), storage tank (10) with be provided with discharge pump (9) on the pipeline between material export (C), secondary feed tank (12) with be provided with secondary intake pump (11) on the pipeline between alkaline wash extraction tower (7), primary intake tank (14) with be provided with primary intake pump (15) on the pipeline between primary mixer (1).

6. A multistage extraction system for diethoxymethane production as claimed in claim 5, wherein: the secondary water inlet pump (11) is communicated with a water injection port of the primary water inlet tank (14).

7. A multistage extraction system for diethoxymethane production as claimed in claim 1, wherein: the tail gas outlet of the primary extraction tower (3), the tail gas outlet of the primary water inlet tank (14), the tail gas outlet of the primary feed tank (4), the tail gas outlet of the secondary extraction tower (6) and the tail gas outlet of the storage tank (10) are all connected with a tail gas pipeline (a); the nitrogen inlet of the primary water inlet tank (14), the nitrogen inlet of the primary feed tank (4) and the nitrogen inlet of the storage tank (10) are all connected with the nitrogen main pipe (b).