DE367216C - Process for heat recovery - Google Patents

Description

Ancestors for recovering heat.

Need a range of substances (saline solutions, fiber, etc.) to unlock considerable amounts of heat by adding heat must be treated under pressure. For their further processing, they have to be relieved according to the relaxation due to the released liquid heat Develop vapors that are blown off or at best for preheating under atmospheric conditions Pressure can be used.

One can. however, make better use of the heat released, by not relieving the pressure from working pressure to atmospheric pressure in one operation, but according to the invention in several stages, so that possibly by working together a number of apparatuses produce a final pressure which is considerably higher than atmospheric pressure and depending on the working pressure used, 10 atm. and can rise more. This can be described as fractional relaxation, like the following example shows: A solution is under a working pressure of I3 Atm. After the In the process, the pressure is left at 9 atm. decrease by transferring to a second Apparatus, then connects to a third apparatus, in which the pressure is 5.5 Atm. Increases, then a fourth with a final pressure of 2.5 atm. and a fifth with 1.4 atm.

The second, third and fourth apparatus have already been heated beforehand thereby working with other devices, depending on the system and grading a certain cycle developed between a corresponding set of apparatuses. It is then to heat the second apparatus only the pressure or. Temperature difference between 9 and 13 atm. to cope with, thereby saving heat up to go percent is achieved.

The one with an overvoltage of 0.4 atm. remaining in apparatus 1 The rest is then blown in a known manner into an evaporator, which is under a lower pressure, the developing vapors or vapors being better known Wise exploited by feeding them to a compressor that compresses them, thereby brings it to a higher temperature and brings it to a radiator that is built into the evaporator. This radiator is the one surrounding it Liquid evaporates, thereby generating vapors again, and these are used as heating means for the process fed in separate rooms.

The accompanying drawings (Fig. I and 2) show an embodiment of the present invention. In Fig. I, A represents a pressurized apparatus (Autoclaves, cookers, etc.), in which the one marked with r, Atm. specified pressure z. B. I3 Atm. may be. After completing the process, it will pass through the connecting pipe G and collector connected to apparatus B, which was previously under a pressure xs = 5.5 Atm. was standing. The internal pressure is created by the connection between these two apparatuses for both on S2 ¾ 9 Atm. balanced, then B is switched off and C switched on, dSer so far below = 2.5 atm. stood and through-iden internal pressure equalization between A and C to 5.5 atm. comes. The residual pressure of 5.5 atm. will after closing the connection between A and C passed over to D, which was previously at approximately atmospheric pressure stood and due to the pressure equalization that now follows to 2.5 atm. is brought. To the Finally, A is connected to E and thus the final voltage of 1.3 to 1.4 atm. achieved, the remaining residual pressure of 1.3 atm. is used to blow out the mass (liquid etc.) is used. This blowing out is best done through the lower outlet a collecting pipe L, which directs the working fluid to the further apparatus.

Apparatus B as well as the following apparatuses B, C, D, E, etc. become after finishing the process in the same way, after being relieved of g atm. to the working pressure of I3 Atm. have been brought by live steam supply. Around to ensure faster execution of the process or the following apparatus The intermediate units (e.g. B and D) can be used as steam accumulators to make better use of them train or set up these steam accumulators separately, so that the pressure relief of the individual devices only takes place after the steam accumulators.

The working fluid coming from the collecting pipe L then runs (It. Fig. 2.) at A in the evaporator B, whereby it is due to the further relaxation that now follows Vapors developed, which are conducted via the pipe c to a compressor D, the is driven by the motor M. As a result of the compression, the vapors rise brought a higher temperature and fed to the radiator F with this. here they give off their heat due to the temperature gradient, generate vapors again, which are removed from the liquid and thus dry the material. The ones in the The air contained in the steam becomes the pipe h, the resulting rainwater discharged by g. The dehydrated or dried material is through the outlet i deflated.

Depending on requirements, as indicated in the drawing, a screw be arranged, which swirls through the material and carries it on.

Claims (2)

PATENT CLAIMS: 1. Process for recovering heat during digestion of aqueous solutions or fibrous materials with the addition of heat and pressure, characterized in that the subsequent relaxation of the working pressure thereby Transferring the resulting vapors into two according to the level of the working pressure or several stages going on up to the internal pressure equalization between apparatuses different initial pressure, while after relaxation to approximately atmospheric pressure remaining mass in an evaporator under atmospheric pressure or vacuum and the vapors or vapors developing there in a known manner fed to a compressor, compressed and the evaporator as heating means in separate To rooms. 2. The method according to claim I, characterized in that Idaß the individual Apparatus are connected by common upper and lower collecting tubes.