Temperature control system, hydrocarbon synthesis reaction apparatus, hydrocarbon synthesis reaction system, and temperature control process

Patent metadata

Field	Value
Publication number	US-9441165-B2
Application number	US-201214007069-A
Country	US
Kind code	B2
Filing date	Mar 15, 2012
Priority date	Mar 30, 2011
Publication date	Sep 13, 2016
Grant date	Sep 13, 2016

Abstract

The temperature control system is provided with a lower heat removing unit which is disposed at the bottom of a reactor inside which an exothermic reaction takes place and through which a liquid coolant is flowed, and an upper heat removing unit which is disposed in the reactor further above from the lower heat removing unit and through which the liquid coolant is flowed, recovering reaction heat inside the reactor and controlling a temperature inside the reactor. The lower heat removing unit is supplied with the liquid coolant which is adjusted for temperature by a first temperature adjustment unit, and the upper heat removing unit is supplied with the liquid coolant which is adjusted for temperature by a second temperature adjustment unit different from the first temperature adjustment unit.

First claim

The invention claimed is:

1. A temperature control system for controlling a temperature inside a reactor in which an exothermic reaction takes place by recovering reaction heat in the reactor, the temperature control system comprising:
a lower heat removing unit which is disposed at the bottom of the reactor and through which a liquid coolant is flowed; and
an upper heat removing unit which is disposed in the reactor further above from the lower heat removing unit and through which the liquid coolant is flowed, wherein
the lower heat removing unit is supplied with the liquid coolant which is adjusted for temperature by a first temperature adjustment unit, and
the upper heat removing unit is supplied with the liquid coolant which is adjusted for temperature by a second temperature adjustment unit different from the first temperature adjustment unit, wherein the system further comprises:
a reaction heat temperature determination unit which determines a temperature inside the bottom of the reactor, wherein the first temperature adjustment unit is controlled on the basis of a determination result of the reaction heat temperature determination unit, and wherein the first temperature adjustment unit is provided with a coolant drum in which a liquid coolant is accommodated in a gas-liquid equilibrium state;
a pressure control unit which controls a pressure inside the coolant drum,
wherein the pressure control unit controls the pressure inside the coolant drum on the basis of deviation of an actual temperature inside the bottom of the reactor determined by the reaction heat temperature determination unit from a temperature set value inside the bottom, thereby controlling a temperature of the liquid coolant inside the coolant drum,
and wherein the coolant drum is provided with a coolant feeding unit which feeds a liquid coolant thereinto,
the coolant feeding unit is disposed inside a gas phase portion of the coolant drum, and
a dispersing unit which disperses a liquid coolant to the gas phase portion is formed at the coolant feeding unit.

2. The temperature control system according to claim 1 , wherein
the coolant feeding unit is formed in a tubular shape, and
the dispersing unit is constituted with a through hole formed on the coolant feeding unit.

3. A hydrocarbon synthesis reaction apparatus in which a synthesis gas containing a hydrogen gas and a carbon monoxide gas as main components is brought into contact with a slurry prepared by suspending catalyst particles inside a liquid medium to synthesize hydrocarbon compounds,
the hydrocarbon synthesis reaction apparatus comprising:
a reactor which accommodates the slurry and to which the synthesis gas is supplied; and
the temperature control system described in claim 1 .

4. A hydrocarbon synthesis reaction system comprising:
the hydrocarbon synthesis reaction apparatus described in claim 3 ;
a synthesis gas production unit which reforms a hydrocarbon feedstock to produce the synthesis gas and supplies the synthesis gas to the reactor; and
an upgrading unit which produces liquid fuels from the hydrocarbon compounds.

5. A temperature control system for controlling a temperature inside a reactor in which an exothermic reaction takes place by recovering reaction heat in the reactor, the temperature control system comprising:
a lower heat removing unit which is disposed at the bottom of the reactor and through which a liquid coolant is flowed; and
an upper heat removing unit which is disposed in the reactor further above from the lower heat removing unit and through which the liquid coolant is flowed, wherein
the lower heat removing unit is supplied with the liquid coolant which is adjusted for temperature by a first temperature adjustment unit, and
the upper heat removing unit is supplied with the liquid coolant which is adjusted for temperature by a second temperature adjustment unit different from the first temperature adjustment unit, wherein the system further comprises:
a reaction heat temperature determination unit which determines a temperature inside the bottom of the reactor, wherein the first temperature adjustment unit is controlled on the basis of a determination result of the reaction heat temperature determination unit, and wherein the first temperature adjustment unit is provided with a coolant drum in which a liquid coolant is accommodated in a gas-liquid equilibrium state and a pressure control unit which controls a pressure inside the coolant drum, and
the pressure control unit controls the pressure inside the coolant drum on the basis of deviation of an actual temperature inside the bottom of the reactor determined by the reaction heat temperature determination unit from a temperature set value inside the bottom, thereby controlling a temperature of the liquid coolant inside the coolant drum, and further comprising:
a return line which returns a mixed phase fluid containing steam generated at the lower heat removing unit and a liquid coolant to the coolant drum;
a steam outlet line which discharges steam inside the coolant drum to outside a system; and
a feed line which supplies feed water composed of a liquid coolant to the return line in a quantity of feed water matching a quantity of steam discharged outside the system.

6. The temperature control system according to claim 5 , further comprising:
a control device which decides the quantity of feed water on the basis of the relationship between a quantity of reaction heat inside the reactor and a difference between a relatively high temperature inside the coolant drum and a relatively low temperature of the feed water; and
a water-supply adjustment device which sets the quantity of feed water to be supplied from the feed line to the return line depending on the quantity of feed water decided by the control device.

7. The temperature control system according to claim 6 , wherein the quantity of feed water decided by the control device is computed by the following formula:
WL 3= Q/{Cp ×( t 1− t 3)+ r }, wherein

WL 3 is a quantity of feed water,
Q is a quantity of reaction heat inside the bottom of the reactor,
Cp is a specific heat of liquid coolant,
t 1 is a temperature inside the coolant drum or inside the bottom of the reactor,
t 3 is a temperature of feed water, and
r is an evaporative latent heat of liquid coolant.

8. The temperature control system according to claim 5 , wherein at a converging portion of the return line with the feed line, the feed line is connected to the return line at an acute angle along a direction at which a mixed phase fluid moves forward inside the return line.

9. The temperature control system according to claim 5 , wherein the feed line is provided with a seal portion which prevents reverse flow of steam.

10. The temperature control system according to claim 5 , wherein
at a converging portion of the return line with the feed line, a spray nozzle which sprays feed water into the return line is installed on the feed line.

11. A hydrocarbon synthesis reaction apparatus in which a synthesis gas containing a hydrogen gas and a carbon monoxide gas as main components is brought into contact with a slurry prepared by suspending catalyst particles inside a liquid medium to synthesize hydrocarbon compounds,
the hydrocarbon synthesis reaction apparatus comprising:
a reactor which accommodates the slurry and to which the synthesis gas is supplied; and
the temperature control system described in claim 5 .

12. A hydrocarbon synthesis reaction system comprising:
the hydrocarbon synthesis reaction apparatus described in claim 11 ;
a synthesis gas production unit which reforms a hydrocarbo

Assignees

• Arai Shinya
• Japan Oil Gas & Metals Jogmec
• Inpex Corp
• Jx Nippon Oil & Energy Corp
• Japan Petroleum Exploration Co Ltd
• Cosmo Oil Co Ltd
• Nippon Steel & Sumikin Eng Co

Inventors

• Arai Shinya

Classifications

• B01J2219/00065

  Pressure measurement · CPC title

• C10G2/33

  characterised by the catalyst used · CPC title

• C10G3/60 Primary

  Controlling or regulating the processes · CPC title

• F01K13/00

  General layout or general methods of operation of complete plants · CPC title

• Y02P30/20

  using bio-feedstock · CPC title