Document number: 4897505 Development date: 20 13/ 1/9.
Technical classification: manufacturing and application technology of physical and chemical devices.
Computer version of the web page: manufacturing method of alcohol double-tower distillation device
Patent name: manufacturing method of alcohol double-tower distillation device
Technical field:
The utility model relates to an alcohol double-tower distillation device.
Background art:
In the existing double-tower alcohol distillation device, the gas-phase interface and liquid-phase interface on the shell side of the reboiler (i.e. heat exchanger) of the mash tower are respectively connected with the gas-phase outlet at the top of the distillation refining tower and the liquid-phase reflux interface in the middle and upper part of the tower through a gas-alcohol reflux pipeline and a liquid-alcohol discharge pipeline, and a refining tower reflux tank, a refining tower reflux pump and an automatic liquid level control valve are sequentially arranged on the liquid-alcohol discharge pipeline near the reboiler of the mash tower, and a remote liquid level gauge is installed on the refining tower reflux tank. The liquid phase inlet and the liquid phase outlet of the reboiler tube side of the mash tower are respectively connected with the liquid phase outlet at the bottom of the mash tower and the liquid phase inlet at the middle of the mash tower through a first mash pipeline and a second mash pipeline, and the first mash pipeline is provided with a mash tower circulating pump. The specific heat exchange process of the reboiler of the mash tower is as follows: the two heat exchange media in the reboiler of the mash tower are the mash flowing from the bottom of the mash tower (commonly known as raw wine, which is a cold medium) and the gaseous alcohol flowing back from the top of the distillation tower (which is a hot medium). The tube side of the reboiler of the mash tower is full of mash, and there is no phase change process. It fully contacts the heat exchange surface of the heat exchange tube in the reboiler of the mash tower, and the mash tower boils again. The mash and the gaseous alcohol exchange heat through the heat exchange tubes in the reboiler of the mash tower, and the gaseous alcohol undergoes phase change in the shell side, and its latent heat is transferred to the mash in the heat exchange tubes through the heat exchange tubes in the reboiler of the mash tower, and the gaseous alcohol condenses into liquid alcohol. As we all know, heat exchanger is a kind of heat exchange equipment that transfers part of the heat of hot fluid to cold fluid, so that the temperature of fluid reaches the specified index of process flow, also known as heat exchanger. It is a general equipment in many industrial sectors such as chemical industry, petroleum, electric power and food, and occupies an important position in production. In the normal production and use process, the heat exchange capacity of the heat exchanger is controlled by adjusting the material flow rate through the valve installed on the pipeline. According to the heat transfer calculation formula q = ks δ t, where q is the total heat exchange capacity; K is thermal conductivity; S is the heat exchange area; At-refers to the average temperature difference between cold and hot media. After the general heat exchanger is manufactured, the K value and S value remain basically unchanged. Under the same process conditions, the At value remains unchanged.