Apparatus for controlling the temperature of a reactor

An apparatus for controlling the temperature of a reactor in which an exo- or endothermic reaction can be conducted in a reaction medium, wherein the apparatus comprises:

• the reactor,
• a heat exchanger system,
• a circulation vessel containing a temperature control fluid with which the heat exchanger system is fed,
• a first shut-off fitting with which the temperature control fluid pressure can be adjusted,
• a second shut-off fitting with which the temperature of the temperature control fluid can be monitored and controlled, and
• a pump with which the temperature control fluid is guided within a circuit from the circulation vessel to the heat exchanger system, and with which the volume of temperature control fluid in the temperature control circuit can be adjusted,
• wherein the heat exchanger system comprises at least one temperature control finger,
• wherein the temperature control finger is a double tube consisting of an inner tube through which the temperature control fluid is introduced into the double tube and an outer tube which is in direct contact with a medium whose temperature is to be controlled and in which the return flow of the temperature control fluid is in an annular gap between inner tube and outer tube, wherein the inner tube of the double tube is thermally insulated, and
• wherein the heat exchanger system is admitted into the reactor such that the outer tube of the temperature control finger is in contact with the reaction medium.