CN1945181A

CN1945181A - Process and device for recovering and utilizing waste hot and wet air energy of drier

Info

Publication number: CN1945181A
Application number: CNA2006101009367A
Authority: CN
Inventors: 李安民; 张爱华; 李巧良
Original assignee: Individual
Current assignee: Individual
Priority date: 2006-07-28
Filing date: 2006-07-28
Publication date: 2007-04-11

Abstract

The present invention is process and apparatus for recovering and utilizing energy of waste hot and humid air from drying machine. The waste hot and humid air is first introduced into hot water to recover latent heat and sensible heat from the waste hot and humid air, and the high temperature hot water is led to a flash tank, where partial high temperature hot water is converted into secondary steam with a steam jetting pump. The secondary steam is then mixed with fresh steam before being used for drying, concentrating evaporation and other steam using operation.

Description

The Processes and apparatus that drying machine used heat humid air energy is recycled

The present invention relates to the Processes and apparatus that a kind of drying machine used heat humid air energy is recycled.In many production processes such as the production processes such as alcohol, starch, all to use drying machine, and drying process is the unit operations of a high energy consumption, to consume lot of energy such as steam, flue gas etc. in the dry run, these energy except small part be dried material take away with the equipment heat loss, most of energy has been transferred in the middle of the used heat humid air, and not only temperature is very high to leave the used heat humid air of drying machine, and owing to contains a large amount of water vapours thereby have a large amount of latent heat.In most of at home manufacturing enterprises, this high-octane used heat humid air all is discharged in the atmosphere and has slatterned.

Purpose of the present invention just provides the Processes and apparatus that a kind of drying machine used heat humid air energy is recycled, to solve the deficiency of existing production technology, and the purpose that reaches conserve energy, protection environment and increase economic efficiency.

The Processes and apparatus that drying machine used heat humid air energy of the present invention is recycled is realized by following steps: 1. at first with the existing spent hot water of factory, as waste water at the bottom of the rectifying column of Alcohol Plant, with steam is the drying machine condensed water of thermal source, or come autocondensation, the higher spent hot water of cooling device temperature, feed in the middle of the equipment trap of the present invention;

2. the used heat humid air that drying machine is come out feeds its temperature is further raise, and after the energy in the used heat humid air was recovered utilization, incoagulable gas was discharged from its upper side;

3. after the coolant-temperature gage in the system raise, density reduced, and just upwards flowed automatically, and following water upwards replenishes, and can form free convection in internal system like this;

4. when water temperature reaches uniform temperature, open steam jet pump, the steam jet pump working pressure is 0.4 to 1.0MPa live steam, just form negative pressure in the flash tank this moment, water evaporates becomes indirect steam under negative pressure, and indirect steam enters jet pump and mixes formation mixed vapour in back with live steam under the effect of pressure reduction, mixed vapour just can be used for equipment such as drying machine or concentration and evaporation, and energy finally obtains recycling.

5. because water evaporates, system's middle water level descends naturally, at this moment should moisturizing in system, and to keep certain water level.

The equipment that drying machine used heat humid air energy of the present invention is recycled technology is: by trap (1), flash tank (2) and jet pump (3) are formed, trap (1) is communicated with flash tank (2) by pipeline, and flash tank (2) is communicated with jet pump (3) by pipeline.

The present invention has following advantage:

1. equipment is simple, and structure is tightly beaten, small investment, instant effect.

2. the present invention does not need the too much power of additive decrementation, can move automatically.

Description of drawings is as follows:

Accompanying drawing is a process equipment schematic diagram of the present invention, and wherein 1 is trap, the 2nd, and flash tank, the 3rd, jet pump.

Claims

1. the technology recycled of drying machine used heat humid air energy, it is characterized in that: (1) feeds the used heat humid air in the water earlier, reclaims wherein sensible heat and latent heat, and the temperature of water is raise;

(2) above-mentioned high-temperature water is fed in the flash tank, utilize steam jet pump that flash tank is pumped into negative pressure, high-temperature water part vaporization in flash tank produces indirect steam, indirect steam and live steam mix the back and form mixed vapour in jet pump, mixed vapour can be used for drying, concentration and evaporation or other need be with the unit operations of steam.

2. the equipment of the technology that drying machine used heat humid air energy according to claim 1 is recycled, it is characterized in that being formed by trap (1), flash tank (2) and jet pump (3), trap (1) is communicated with flash tank (2) by pipeline, and flash tank (2) is communicated with jet pump (3) by pipeline.