Triple-pipe-heat pipe millimeter channel reactor and use method thereof

A triple-pipe-heat pipe millimeter channel reactor, comprising an evaporation section (1) and a condensation section (2);

• the evaporation section (1) comprises a first inner pipe (11), a middle pipe (12) and an outer pipe (13) coaxially sleeved from an interior to an exterior;
• an inner annular gap (14) is formed between the first inner pipe (11) and the middle pipe (12);
• an outer annular gap (15) is formed between the middle pipe (12) and the outer pipe (13);
• the condensing section (2) comprises a second inner pipe (21) and multiple large fins (22);
• multiple large fins (22) are arranged in oblique radiation around the second inner pipe (21);
• the second inner pipe (21) is connected to the first inner pipe (11);
• the outer annular gap (15) is connected to the large fins;
• an outer wall of the second inner pipe (21) is provided with multiple first small fins (211) and the first small fins (211) are connected to the outer wall of the second inner pipe (21);
• the outer walls of the large fins (22) are provided with multiple second small fins (221) and the second small fins (221) are connected to the outer walls of the large fins (22).