Vacuum system for producing ethylene oxide derivative

Abstract

The utility model discloses a vacuum system for producing ethylene oxide derivatives, which comprises a storage tank, the discharge end of the storage tank is communicated with an organic matter separation tank through a storage tank gas phase pipeline, and the bottom of the organic matter separation tank is communicated with the storage tank gas phase pipeline through an organic matter backflow pipeline. The top of the organic matter separation tank is communicated with the gas inlet end of the vacuum pump through a gas inlet pipe, the gas outlet end of the vacuum pump is communicated with the gas-liquid separation tank through a drainage pipe, the top gas outlet end of the gas-liquid separation tank is communicated with the tail gas treatment system through an exhaust pipe, and the bottom water outlet end of the gas-liquid separation tank is communicated with the water storage tank; according to the scheme, ethylene oxide derivative gas-liquid separation can be effectively achieved, liquid substances are prevented from blocking a vacuum pump, meanwhile, cross contamination of different materials is avoided, and then the product quality is improved.

Description

Technical Field

[0001] This utility model relates to the field of chemical product manufacturing, specifically to a vacuum system for the production of ethylene oxide derivatives. Background Technology

[0002] Vacuum systems in ethylene oxide derivative production units are mainly used for catalytic dehydration of raw materials and stripping of products. Water ring vacuum pumps are generally used to provide vacuum conditions. However, existing vacuum systems have the following problems: Because the boiling points of raw materials and water are close, gas-liquid entrainment easily occurs during the vacuuming process. A small amount of liquid droplets enters the vacuum pump along the vacuum pipeline, leading to increased viscosity of the working fluid or blockage of the vacuum pump, making stable operation impossible. Furthermore, there are many types of ethylene oxide derivatives, differing mainly in the type of raw material and the proportion of ethylene oxide. If the liquid separated in the organic matter separation tank after catalytic dehydration of different raw materials is not completely drained, cross-contamination can easily occur, leading to product quality problems. Utility Model Content

[0003] To address the shortcomings of existing technologies, the technical problem this invention aims to solve is to provide a vacuum system for the production of ethylene oxide derivatives that can effectively achieve gas-liquid separation, thereby preventing liquid substances from clogging the vacuum pump and avoiding cross-contamination between different materials, thus improving product quality.

[0004] To solve the above problems, this utility model provides the following technical solution:

[0005] A vacuum system for the production of ethylene oxide derivatives includes a storage tank. The outlet of the storage tank is connected to an organic matter separation tank via a gas phase pipeline. The bottom of the organic matter separation tank is connected to the gas phase pipeline of the storage tank via an organic matter return pipeline. The top of the organic matter separation tank is connected to the inlet of a vacuum pump via an inlet pipe. The outlet of the vacuum pump is connected to a gas-liquid separation tank via a drain pipe. The top outlet of the gas-liquid separation tank is connected to a tail gas treatment system via an exhaust pipe. The bottom outlet of the gas-liquid separation tank is connected to a water storage tank.

[0006] The technical solution of this utility model also includes that the organic matter separation tank is equipped with a demister. The gas in the storage tank enters the organic matter separation tank through the gas phase pipeline of the storage tank. The demister can be used to remove entrained droplets. The droplets collected in the organic matter separation tank are purged to the storage tank through the organic matter return pipeline, thereby avoiding cross-contamination.

[0007] The technical solution of this utility model also includes that the vacuum pump is equipped with a cooling device.

[0008] The technical solution of this utility model also includes a cooling device comprising a cooler. The inlet of the cooler is connected to the gas-liquid separator via a return water pipeline. A cooling circulating water network is provided on the vacuum pump. The outlet of the cooler is connected to the inlet of the cooling circulating water network, and the outlet of the cooling circulating water network is connected to a water storage tank via a circulating water pipeline. The vacuum pump generates a lot of heat during operation. Therefore, the water in the gas-liquid separator is continuously circulated and cooled by the cooler on the return water pipeline, effectively reducing the operating temperature of the vacuum pump. Furthermore, it does not require excessive replenishment of fresh water to meet the operating needs of the vacuum pump.

[0009] The technical solution of this utility model also includes an overflow pipe connected to the top of the gas-liquid separator, and the outlet of the overflow pipe is connected to a water storage tank through a circulating water pipeline. When there is a lot of water in the gas-liquid separator, it flows out through the overflow pipe to maintain the required water level in the gas-liquid separator and meet the operating conditions of the vacuum pump.

[0010] The technical solution of this utility model also includes that the top of the gas-liquid separator is connected to a water supply pipe, and the water inlet end of the water supply pipe is connected to a water storage tank.

[0011] The technical solution of this utility model also includes a return pipe connected between the exhaust pipe and the intake pipe, and a regulating valve is provided on the return pipe. The vacuum degree of the vacuum pump can be adjusted by the regulating valve through the return pipe.

[0012] The beneficial effects of this utility model are as follows: Compared with the prior art, the purpose of this utility model is to provide a vacuum system for the production of ethylene oxide derivatives that can effectively achieve gas-liquid separation, thereby avoiding the blockage of the vacuum pump by liquid substances and preventing cross-contamination between different materials, thus improving product quality. To achieve the above technical effects, the vacuum system of this solution is sequentially equipped with an organic matter separation tank, a vacuum pump, and a gas-liquid separation tank. The vacuuming process is effectively carried out by removing liquid droplets entrained during the vacuuming process through a demister configured in the organic matter separation tank. Furthermore, an organic matter return pipeline is installed at the bottom of the organic matter separation tank, which can purge the entrained liquid droplets to a storage tank, working in conjunction with the gas-liquid separation tank to achieve effective gas-liquid separation. This solves the problem in the prior art where liquid droplets are entrained into the vacuum pump during the vacuuming process, thus blocking the vacuum pump, and also solves the problem of cross-contamination caused by vacuuming different materials, thereby improving product quality. In addition, the working fluid of the vacuum pump is recycled, effectively reducing water waste. Attached Figure Description

[0013] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, for those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0014] Figure 1This is a vacuum system for the production of ethylene oxide derivatives in a specific implementation.

[0015] Among them, 1 is a storage tank, 2 is an organic matter separation tank, 3 is a demister, 4 is a vacuum pump, 5 is a gas-liquid separation tank, 6 is a cooler, 7 is a gas phase pipeline of the storage tank, 8 is an organic matter return pipeline, 9 is an air inlet pipe, 10 is a drain pipe, 11 is a water return pipeline, 12 is a return pipe, 13 is an exhaust pipe, 14 is a water supply pipe, 15 is an overflow pipe, 16 is a regulating valve, 17 is a water storage tank, 18 is a circulating water pipeline, 19 is a tail gas treatment system, and 20 is a cooling circulating water network. Detailed Implementation

[0016] To enable those skilled in the art to better understand the technical solutions of this utility model, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort should fall within the protection scope of this utility model.

[0017] In the description of this utility model, it should be understood that the terms "center", "horizontal", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", and "outer" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the purpose of simplifying the description of this utility model and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0018] As shown in the attached figure, a vacuum system for the production of ethylene oxide derivatives includes a storage tank 1. The discharge end of the storage tank 1 is connected to an organic matter separation tank 2 through a storage tank gas phase pipeline 7. The organic matter separation tank 2 is equipped with a demister 3. The bottom of the organic matter separation tank 2 is connected to the storage tank gas phase pipeline 7 through an organic matter return pipeline 8.

[0019] The top of the organic matter separator 2 is connected to the inlet of the vacuum pump 4 via an inlet pipe 9. The outlet of the vacuum pump 4 is connected to the gas-liquid separator 5 via a drain pipe 10. The top outlet of the gas-liquid separator 5 is connected to the exhaust gas treatment system 19 via an exhaust pipe 13. A return pipe 12 connects the exhaust pipe 13 and the inlet pipe 9, and a regulating valve 16 is installed on the return pipe 12. The bottom outlet of the gas-liquid separator 5 is connected to the water storage tank 17.

[0020] The vacuum pump 4 is equipped with a cooling device, which includes a cooler 6. The inlet of the cooler 6 is connected to the gas-liquid separator 5 through the return water pipeline 11. The outlet of the cooler 6 is connected to the inlet of the cooling circulating water network 20 of the vacuum pump 4. The outlet of the cooling circulating water network 20 is connected to the water storage tank 17 through the circulating water pipeline 18.

[0021] The top of the gas-liquid separator 5 is connected to an overflow pipe 15, and the outlet of the overflow pipe 12 is connected to the water storage tank 17 through a circulating water pipeline 18. The top of the gas-liquid separator 5 is connected to a water supply pipe 14, and the inlet of the water supply pipe 14 is connected to the water storage tank 17.

[0022] The system operates as follows: Ethylene oxide derivative gas in storage tank 1 enters organic matter separator 2 via gas phase pipeline 7. Organic matter separator 2 is equipped with a demister 3 to remove entrained droplets. Droplets collected in organic matter separator 2 are purged back to storage tank 1 via organic matter return pipeline 8, thus preventing cross-contamination. Gas exiting organic matter separator 2 enters vacuum pump 4 via inlet pipe 9, and then is discharged to gas-liquid separator 5 via drain pipe 10. Gas containing water is separated in gas-liquid separator 5 and sent to tail gas treatment system 19, while water remains in gas-liquid separator 5. Gas-liquid separator 5 is equipped with overflow pipe 15. When there is excessive water in gas-liquid separator 5, it flows out through overflow pipe 15 to maintain the required water level in gas-liquid separator 5, meeting the operating conditions of the vacuum pump.

[0023] The vacuum level of vacuum pump 4 can be adjusted by regulating valve 16 installed on return pipe 12. Water for vacuum pump 4 is supplied by water supply pipe 14 through return water line 11. Vacuum pump 4 generates a lot of heat during operation, so water from gas-liquid separator 5 is circulated and cooled by cooler 6 installed on return water line 11, so that the operation of vacuum pump 4 can be met without adding too much fresh water.

[0024] The above system effectively solves the problem of liquid droplets being entrained in the vacuum pump and causing blockage, a common issue in existing vacuum systems. It also resolves cross-contamination issues arising from the vacuuming process of different materials, including ethylene oxide derivatives, reducing material loss and improving product quality. Furthermore, it addresses the problem of recycling the working fluid in the vacuum pump, reducing water waste.

[0025] Although the present invention has been described in detail with reference to the accompanying drawings and preferred embodiments, it is not limited thereto. Various equivalent modifications or substitutions can be made to the embodiments of the present invention by those skilled in the art without departing from the spirit and essence of the present invention, and all such modifications or substitutions should be within the scope of the present invention. Any variations or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in the present invention should be included within the protection scope of the present invention. Therefore, the protection scope of the present invention should be determined by the scope of the claims.

Claims

1. A vacuum system for the production of ethylene oxide derivatives, characterized in that: The system includes a storage tank, the discharge end of which is connected to an organic matter separation tank via a storage tank gas phase pipeline. The bottom of the organic matter separation tank is connected to the storage tank gas phase pipeline via an organic matter return pipeline. The top of the organic matter separation tank is connected to the inlet end of a vacuum pump via an inlet pipe. The outlet end of the vacuum pump is connected to a gas-liquid separation tank via a drain pipe. The top outlet end of the gas-liquid separation tank is connected to a tail gas treatment system via an exhaust pipe. The bottom water outlet end of the gas-liquid separation tank is connected to a water storage tank.

2. The vacuum system for producing ethylene oxide derivatives according to claim 1, characterized in that: The organic matter separation tank is equipped with a demister.

3. The vacuum system for producing ethylene oxide derivatives according to claim 1, characterized in that: The vacuum pump is equipped with a cooling device.

4. The vacuum system for producing ethylene oxide derivatives according to claim 3, characterized in that: The cooling device includes a cooler, the inlet of which is connected to a gas-liquid separator via a return water pipeline. A cooling circulating water network is provided on the vacuum pump. The outlet of the cooler is connected to the inlet of the cooling circulating water network, and the outlet of the cooling circulating water network is connected to a water storage tank via a circulating water pipeline.

5. The vacuum system for producing ethylene oxide derivatives according to claim 4, characterized in that: The top of the gas-liquid separator is connected to an overflow pipe, and the outlet of the overflow pipe is connected to the water storage tank through a circulating water pipeline.

6. The vacuum system for producing ethylene oxide derivatives according to claim 1, characterized in that: The top of the gas-liquid separator is connected to a water supply pipe, and the inlet end of the water supply pipe is connected to a water storage tank.

7. The vacuum system for producing ethylene oxide derivatives according to claim 1, characterized in that: A return pipe is connected between the exhaust pipe and the intake pipe, and a regulating valve is provided on the return pipe.

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