CN215464302U

CN215464302U - Device for increasing yield of dimethyl sulfide

Info

Publication number: CN215464302U
Application number: CN202120862850.8U
Authority: CN
Inventors: 刘永杰; 田云清; 王刚; 李涛; 付川川; 刘奇洁
Original assignee: Xinjiang Xingfa Chemical Co ltd
Current assignee: Xinjiang Xingfa Chemical Co ltd
Priority date: 2021-04-25
Filing date: 2021-04-25
Publication date: 2022-01-11
Anticipated expiration: 2031-04-25

Abstract

The utility model discloses a device for improving the yield of dimethyl sulfide. The molten salt preheater is also connected with a feeding pipe of the methanol absorption tower. The thioether reactor is connected with a molten salt preheater. The device provided by the utility model is used for producing dimethyl sulfide, so that the liquid methanol is vaporized by utilizing reaction heat, the utilization rate of resources is improved, the feeding amount of methanol is increased, the yield of dimethyl sulfide is improved, and the consumption of equipment is reduced.

Description

Device for increasing yield of dimethyl sulfide

Technical Field

The utility model belongs to the field of dimethyl sulfide production and preparation, and particularly relates to a device for increasing feeding and improving the yield of dimethyl sulfide.

Background

Methanol in the existing dimethyl sulfide reaction equipment is vaporized by a vaporizer, and the vertical tube-and-tube heat exchanger adopted by the vaporizer has the defects that the heat exchange area is fixed, the vaporization amount of the methanol is limited, and the set feeding amount of a sulfide reactor cannot be reached, so that the yield of the dimethyl sulfide is influenced.

When the feeding amount reaches a proper amount, the reaction starts to release heat, the temperature of the system gradually rises, and the traditional method exchanges heat through molten salt and steam to drive the temperature of the system to fall after the temperature of the molten salt falls, so that the reaction temperature is controlled. The method has the advantages that the temperature difference between the molten salt and the steam is large, the difficulty in controlling the temperature of equipment is large, the damage to the equipment is serious, the great resistance is increased for production, and meanwhile, the potential safety hazard also exists.

Disclosure of Invention

The technical scheme adopted for solving the technical problem is to provide a device for improving the yield of dimethyl sulfide: the mixed gas pipeline is connected with the molten salt preheater, the vaporizer is connected with the molten salt preheater, the molten salt preheater is connected with the molten salt tank, and the molten salt tank is connected with the thioether reactor through the feeding pump.

The molten salt preheater is also connected with a methanol absorption tower feed pipe, and the methanol absorption tower is connected with the vaporizer.

The thioether reactor is connected with a molten salt preheater.

The technical concept of the above-mentioned device is that hydrogen sulfide and carbon disulfide gas mixture get into in the fused salt pre-heater pipe layer with gaseous state methyl alcohol, the fused salt through in the fused salt pre-heater shell layer heats, gas after the heating gets into can emit a large amount of heat energy after the thioether reactor takes place to react, thereby make the system temperature rise, now squeeze into the fused salt pre-heater with liquid methyl alcohol from the methyl alcohol absorption tower through the pump, through the even fused salt pre-heater pipe layer that gets into of distributor, the fused salt vaporizes it in through the shell layer, absorb the heat of fused salt, thereby reduce the fused salt temperature, reduce the system temperature, alleviate the load of vaporizer, the input of methyl alcohol in the thioether reactor has also been increased simultaneously.

The liquid methanol enters the molten salt preheater, and a distributor is arranged in the preheater, so that the liquid methanol can be effectively and uniformly distributed in the preheater, and the liquid methanol is prevented from forming strands, thereby causing large local temperature difference and damaging equipment.

The utility model not only utilizes the reaction heat release to vaporize the liquid methanol, thereby improving the utilization rate of resources, increasing the feeding amount of the methanol, improving the yield of the dimethyl sulfide, but also reducing the consumption of equipment.

Drawings

FIG. 1 is a schematic diagram of an apparatus for increasing the yield of dimethyl sulfide. Wherein, 1, a molten salt tank; 2. a thioether reactor; 3. a molten salt preheater; 4. a vaporizer; 5. a methanol absorption tower.

Detailed Description

Example 1

Improve device of dimethyl sulfide output, the gas mixture pipeline is connected with fused salt pre-heater 3, and vaporizer 4 is connected with fused salt pre-heater 3, and fused salt pre-heater 3 is connected with fused salt groove 1, and fused salt groove 1 is connected with thioether reactor 2 through the material loading pump. The molten salt preheater 3 is also connected with a feeding pipe of a methanol absorption tower 5, and the methanol absorption tower 5 is connected with the vaporizer 4. The thioether reactor 2 is connected with a molten salt preheater 3.

The method for replacing heated gaseous methanol with liquid methanol comprises the following processes:

sulfur vaporization: putting solid sulfur into a sulfur melting storage tank, heating to 120 ℃, and heating and melting the sulfur into liquid sulfur;

preparing mixed gas: the liquid sulfur is thrown into a heating furnace preheated to 650 ℃ at 146 kg/h for gasification, natural gas is introduced at 200 kg/h, the temperature is raised to 750 ℃ again, and the gasified sulfur and the natural gas react to generate mixed gas of hydrogen sulfide and carbon disulfide under the condition that the temperature in the furnace is controlled to 750 ℃;

methanol vaporization: liquid methanol is pumped into a vaporizer to vaporize the methanol;

synthesizing thioether: the prepared mixed gas and vaporized methanol are put into a preheater according to the ratio of 1:2.17 (namely the feeding flow of the mixed gas is 860kg/h, and the feeding flow of the vaporized methanol is 1870 kg/h), the two gases are heated to 385 ℃ for reaction, the heated gases are pumped into a column-type thioether reactor (3 tons) filled with aluminum oxide which does not pass through the 20 cm part of an upper end socket column pipe, gas dimethyl sulfide is generated after the reaction, and liquid dimethyl sulfide is obtained by condensing through a condenser. In the process of continuously synthesizing the thioether and in the process of generating the dimethyl thioether gas through catalytic reaction, when the temperature is increased to 399 ℃, liquid methanol is supplemented, the adding amount of the liquid methanol is 100 kg/h, and the yield of the dimethyl thioether is 55.5 tons. The yield of the single set of dimethyl sulfide is 29.6 tons, the purity is 99.8 percent, the by-product methyl mercaptan is about 5 percent, and the mass of the dimethyl sulfide can reach 99.8 percent through primary rectification.

Claims

1. The device for improving the yield of dimethyl sulfide is characterized in that a mixed gas pipeline is connected with a molten salt preheater (3), a vaporizer (4) is connected with the molten salt preheater (3), the molten salt preheater (3) is connected with a molten salt tank (1), and the molten salt tank (1) is connected with a sulfide reactor (2) through a feeding pump.

2. The apparatus for increasing the yield of dimethyl sulfide as claimed in claim 1, wherein the molten salt preheater (3) is further connected with a feeding pipe of a methanol absorption tower (5), and the methanol absorption tower (5) is connected with the vaporizer (4).

3. Plant for increasing the production of dimethyl sulphide according to claim 1, characterized in that the sulphide reactor (2) is connected to a molten salt preheater (3).