Heat recovery device

Patent metadata

Field	Value
Publication number	US-10105670-B2
Application number	US-201415022191-A
Country	US
Kind code	B2
Filing date	Sep 17, 2014
Priority date	Sep 17, 2013
Publication date	Oct 23, 2018
Grant date	Oct 23, 2018

Abstract

Disclosed are a heat recovery device and a heat recovery method. According to the heat recovery device, it is possible to recovery heat which is discontinuously generated in a batch reactor. In addition, a heat-exchanged heat exchange medium is supplied to a heat storage facility so that various kinds and a great quantity of steams can be produced, if necessary, thereby utilizing these produced steams in various industrial fields.

First claim

The invention claimed is:

1. A heat recovery device, comprising an insulated tank in which saturated water is stored, a reactor and a heat exchanger, each of which comprises an inlet line and an outlet line, wherein a stream discharged from the reactor enters the heat exchanger along the outlet line of the reactor and is heat-exchanged with the saturated water or a heat exchange medium entering the heat exchanger, and the stream then enters the reactor along the inlet line of the reactor,
wherein the reactor is a batch reactor which discontinuously generates a heat source.

2. The heat recovery device of claim 1 , wherein the stream discharged from the reactor is heat-exchanged with the heat exchange medium, and wherein the heat exchange medium is condensed water.

3. The heat recovery device of claim 1 , wherein the heat exchanger is installed at an inside or an outside of the insulated tank.

4. The heat recovery device of claim 3 , wherein the heat exchanger is installed at an outside of the insulated tank, the stream discharged from the reactor enters the heat exchanger along the outlet line of the reactor and is heat-exchanged with the heat exchange medium entering the heat exchanger along the inlet line of the heat exchanger, the stream then enters the reactor along the inlet line of the reactor, and the heat exchange medium after heat exchange enters the insulated tank along the inlet line of the insulated tank.

5. The heat recovery device of claim 3 , wherein the heat exchanger is installed inside of the insulated tank in which the saturated water is stored, the stream discharged from the reactor enters the heat exchanger along the outlet line of the reactor and is heat-exchanged with the saturated water stored in the insulated tank, the stream then re-enters the reactor along the inlet line of the reactor.

6. The heat recovery device of claim 4 , wherein a temperature of the stream entering the reactor and a temperature of the saturated water stored in the insulated tank satisfy the following General equation 1:
5° C.≤ T Rin −T SW ≤70° C.  [General equation 1]

wherein, T Rin represents the temperature of the stream entering the reactor, and T SW represents the temperature of the saturated water stored in the insulated tank.

7. The heat recovery device of claim 6 , wherein the stream entering the reactor is a stream of a condensed reactant.

8. The heat recovery device of claim 5 , wherein the condensed water enters the insulated tank along the inlet line of the insulated tank.

9. The heat recovery device of claim 1 , wherein the stream discharged from the reactor is a stream of a gas-phase reactant.

10. The heat recovery device of claim 4 , wherein the heat exchange medium after heat exchange is a stream of liquid-phase condensed water, and the device further comprises a circulation line connected to the inlet line of the heat exchanger from a lower portion of the insulated tank, and the saturated water discharged from the lower portion of the insulated tank enters the heat exchanger inlet line along the circulation line.

11. The heat recovery device of claim 4 , wherein the insulated tank further comprises a steam discharge line.

12. The heat recovery device of claim 11 , wherein a temperature of the stream flowing along the steam discharge line and a temperature of the stream entering the insulated tank along the inlet line of the insulated tank satisfy the following General equation 2:
10° C.≤ T Sout −T Tin ≤200° C.  [General equation 2]

wherein, T Sout represents the temperature of the stream flowing along the steam discharge line, and T Tin represents the temperature of the stream entering the insulated tank along the inlet line of the insulated tank.

13. The heat recovery device of claim 11 , further comprising a control unit configured to control a pressure and/or a production amount of the steam.

14. A heat recovery method, comprising;
introducing a stream discharged from a batch reactor to a heat exchanger and heat-exchanging with saturated water stored in an insulated tank or heat exchange medium entering the heat exchanger; and
re-introducing the stream, which is discharged from the batch reactor and heat-exchanged with the saturated water or the heat exchanged medium to the batch reactor.

15. The heat recovery method of claim 14 , wherein the stream discharged from the batch reactor to the heat exchanger is heat-exchanged with the heat exchange medium, wherein the heat exchange medium is condensed water.

16. The heat recovery method of claim 14 , further comprising introducing the condensed water or the heat exchange medium after heat exchange to the insulated tank.

17. The heat recovery method of claim 16 , wherein a temperature of the stream entering the reactor and a temperature of the saturated water stored in the insulated tank satisfy the following General equation 1:
5° C.≤ T Rin −T SW ≤70° C.  [General equation 1]

wherein, T Rin represents the temperature of the stream entering the reactor and T SW represents the temperature of the saturated water stored in the insulated tank.

18. The heat recovery method of claim 16 , further comprising discharging steam from an upper portion of the insulated tank.

19. The heat recovery method of claim 18 , wherein a temperature of the steam discharged from the upper portion of the insulated tank and a temperature of the condensed water or the heat-exchanged heat exchange medium entering the insulated tank satisfy the following General equation 2:
10° C.≤ T Sout −T Tin ≤200° C.  [General equation 2]

wherein, T Sout represents the temperature of the steam discharged from the upper portion of the insulated tank and T Tin represents the temperature of the condensed water or the heat-exchanged heat exchange medium entering the insulated tank.

Assignees

• Lg Chemical Ltd

Inventors

• Kim Tae Woo
• Lee Sung Kyu
• Shin Joon Ho

Classifications

• B01J2219/00103

  in a heat exchanger separate from the reactor · CPC title

• B01J19/0053 Primary

  Details of the reactor · CPC title

• B01J19/0013

  Controlling the temperature of the process · CPC title

• B01J2219/00029

  Batch processes · CPC title

• B01J10/00 Primary

  Chemical processes in general for reacting liquid with gaseous media other than in the presence of solid particles, or apparatus specially adapted therefor (B01J19/08 takes precedence; separation, e.g. distillation, also combined with chemical reactions B01D, {e.g. B01D3/009}) · CPC title