Two-in-one heat pump rectification system and device for preparing electronic-grade ester by using same

Abstract

The utility model discloses a one-with-two heat pump rectification system and a device for preparing electronic grade ester by using the system, the system comprises a light component removal tower and a product tower, an ester crude product is taken as a raw material and enters the light component removal tower firstly, light components pass through a light component removal tower condenser from the top of the light component removal tower, part of the light components are refluxed, and part of the light components are extracted from a light component removal tower reflux tank; materials extracted from a tower kettle of the light component removal tower enter the product tower, all steam at the top of the product tower serves as a high-quality heat source through a compressor and supplies heat to the first reboiler and the second reboiler, after condensation, the steam enters a reflux tank of the product tower, part of the steam is refluxed, part of the steam is extracted, and the tower kettle of the light component removal tower and the tower kettle of the product tower are connected with the first reboiler and the second reboiler respectively. According to the utility model, the electronic-grade ester is prepared by adopting a one-two heat pump rectification system, and the steam at the top of the product tower can be simultaneously used as a heat source of the reboiler I and the reboiler II at the bottoms of the light component removal tower and the product tower after being compressed, so that the steam consumption and the equipment investment are saved, and the cost is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of production, in particular to a one-belt two-heat pump distillation system and a device for preparing electronic grade ester by using the system. Background Art

[0002] Electronic-grade esters mainly include carbonates, oxalates, acetates, etc. With the continuous development of the battery industry and the semiconductor industry, the demand for electronic-grade esters continues to increase, and the purity requirements are also increasing, usually meeting at least 4 nines purity. The main method for producing electronic-grade esters is to further distill and purify industrial products (usually 3 nines). However, the distillation process requires a large number of theoretical plates and a large reflux ratio. Therefore, in the process of electronic-grade ester distillation, the energy consumption is high, which makes the production cost of electronic-grade esters high, and seriously limits the large-scale production and market promotion of electronic-grade ester products.

[0003] Therefore, in order to solve the above problems, a one-with-two heat pump distillation system and a device for preparing electronic-grade ester using the system are proposed. The one-with-two heat pump distillation system can compress the top steam of the product tower and use it as the heat source of the first and second reboilers of the de-light tower and the product tower kettle, thereby saving steam consumption and equipment investment and reducing costs. Utility Model Content

[0004] The purpose of this utility model patent is to provide a one-with-two heat pump distillation system and a device for preparing electronic grade ester using the system. It includes a light removal tower and a product tower. The crude ester is used as a raw material and first enters the light removal tower. The light component passes through the light removal tower condenser from the top of the light removal tower, part of it refluxes, and part of it is extracted from the reflux tank of the light removal tower. The material extracted from the kettle of the light removal tower enters the product tower. The steam at the top of the product tower is all used as a high-quality heat source by the compressor to supply heat to the reboiler 1 and the reboiler 2 respectively. After condensation, it enters the reflux tank of the product tower, part of it refluxes, and part of it is extracted. The light removal tower and the kettle of the product tower are connected to the reboiler 1 and the reboiler 2 respectively. The utility model adopts a one-with-two heat pump distillation system to prepare electronic grade ester. After compression, the steam at the top of the product tower can be used as a heat source for the reboiler 1 and the reboiler 2 of the light removal tower and the kettle of the product tower, saving steam consumption and reducing costs.

[0005] Compared with the prior art, the beneficial effects of the utility model are as follows: based on a full study of the process route and reaction mechanism, the utility model adopts a one-belt two heat pump distillation system to combine a compressor with two reboilers, thereby reducing equipment investment, saving steam consumption and reducing costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0006] Figure 1 It is a structural schematic diagram of the utility model.

[0007] The reference numerals and names in the figures are as follows:

[0008] 1. Crude ester storage tank; 2. Feed pump for de-lightness tower; 3. De-lightness tower; 4. Product tower; 5. Condenser for de-lightness tower; 6. Reflux tank for de-lightness tower; 7. Compressor; 8. Reboiler 1; 9. Reboiler 2; 10. Reflux tank for product tower; 11. Extraction pump for de-lightness tower kettle; 12. Extraction pump for product tower kettle. DETAILED DESCRIPTION

[0009] 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.

[0010] As attached Figure 1 As shown, the utility model provides a one-with-two heat pump distillation system and a device for preparing electronic grade ester using the system. It includes: a light removal tower 3 and a product tower 4, the crude ester storage tank 1 is connected to the light removal tower 3, the top of the light removal tower 3 is connected to the light removal tower condenser 5, the light removal tower condenser 5 is connected to the light removal tower reflux tank 6, the tower kettle of the light removal tower 3 is connected to the product tower 4, and the top of the product tower 4 is connected to the compressor 7, which is characterized in that: the compressor 7 is respectively connected to the reboiler 1 8 and the reboiler 2 9, the reboiler 1 8 and the reboiler 2 9 are connected to the product tower reflux tank 10, the product tower reflux tank 10 is connected to the top of the product tower 4, and the tower kettles of the light removal tower 3 and the product tower 4 are respectively connected to the reboiler 1 8 and the reboiler 2 9.

[0011] Specifically, a de-lightening tower feed pump 2 is connected between the crude ester storage tank 1 and the de-lightening tower 3, a de-lightening tower kettle extraction pump 11 is connected between the kettle of the de-lightening tower 3 and the product tower 4, and the kettle residue of the product tower 4 is extracted through the product tower kettle extraction pump 12, so that the input amount of raw materials can be accurately controlled, which is beneficial to the reaction and the generation of products.

[0012] Working principle: The utility model provides a one-with-two heat pump distillation system and a device for preparing electronic grade ester using the system. The crude ester storage tank 1 is connected to the material inlet of the light removal tower 3 through the light removal tower feed pump 2. The light component enters the light removal tower reflux tank 6 from the top of the light removal tower 3 through the light removal tower condenser 5, and part of it is refluxed to the top of the light removal tower 3, and part of it is extracted from the light removal tower reflux tank 6. The material in the bottom of the light removal tower 3 enters the material inlet of the product tower 4 through the light removal tower bottom extraction pump 11. The top steam of the product tower 4 passes through the compressor 7, and heats the reboiler 1 8 and the reboiler 2 9 respectively. After condensation, it enters the product tower reflux tank 10, part of it is refluxed to the top of the product tower 4, and part of it is extracted from the product tower reflux tank 10. The bottom of the light removal tower 3 is connected to the reboiler 1 8, and the bottom of the product tower 4 is connected to the reboiler 2 9. The bottom of the bottom of the product tower 4 is extracted through the product tower extraction pump 12. The light components removal tower in the device is mainly used to remove light components from the raw materials, and the product tower is mainly used to produce electronic grade esters. All the steam from the top of the product tower is compressed by a compressor and heat is provided to two reboilers at the same time. External steam heating is no longer required, which saves steam consumption and reduces equipment investment.

[0013] In addition, it should be understood that although this specification is described according to implementation methods, not every implementation method contains only one independent technical solution. This narrative method of the specification is only for the sake of clarity. Those skilled in the art should take the specification as a whole to form other implementation methods that can be understood by those skilled in the art.

[0014] In the description of the present invention, it should be noted that the terms "upper", "lower", "inner", "outer", "front section", "rear end", "two ends", "one end", "the other end" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply 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 limiting the present invention. In addition, the terms "first" and "second" are used for descriptive purposes only and cannot be understood as indicating or implying relative importance.

[0015] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "provided with", "connected", etc. should be understood in a broad sense. For example, "connected" 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 according to specific circumstances.

Claims

1. A one-belt two-heat pump distillation system and a device for preparing electronic grade ester using the system, comprising: A light removal tower (3) and a product tower (4), wherein the crude ester storage tank (1) is connected to the light removal tower (3), the top of the light removal tower (3) is connected to a light removal tower condenser (5), the light removal tower condenser (5) is connected to a light removal tower reflux tank (6), the bottom of the light removal tower (3) is connected to the product tower (4), the top of the product tower (4) is connected to a compressor (7), and the compressor (7) is characterized in that: the compressor (7) is respectively connected to a reboiler 1 (8) and a reboiler 2 (9), the reboiler 1 (8) and the reboiler 2 (9) are connected to a product tower reflux tank (10), the product tower reflux tank (10) is connected to the top of the product tower (4), and the bottoms of the light removal tower (3) and the product tower (4) are respectively connected to a reboiler 1 (8) and a reboiler 2 (9).

2. The one-belt-two heat pump distillation system and the device for preparing electronic grade ester using the same according to claim 1, characterized in that: A lightness removal tower feed pump (2) is connected between the crude ester storage tank (1) and the lightness removal tower (3).

3. The one-belt-two heat pump distillation system and the device for preparing electronic grade ester using the same according to claim 1, characterized in that: A lightness removal tower kettle extraction pump (11) is connected between the lightness removal tower (3) kettle and the product tower (4).

4. The one-belt-two heat pump distillation system and the device for preparing electronic grade ester using the same according to claim 1, characterized in that: The bottom residue of the product tower (4) is extracted through the product tower bottom extraction pump (12).

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