The application discloses a high-
flux tube heat exchanger convenient to adjust, and belongs to the technical field of heat exchangers, which comprises a shell, a first tube box and a second tube box, two tube plates are arranged in the shell, a plurality of tube bundles with grooves are arranged on the two tube plates, fixed baffles are further arranged in the shell, movable baffle protection mechanisms are arranged on the side of each fixed baffle, and the tube bundles penetrate through the fixed baffles and the movable baffle protection mechanisms. Through the application, the grooves on the surface of the tube bundles can be cleaned, the grooves can be used for different types of groove structures, have universal applicability, the situation that scale is accumulated in the grooves is effectively avoided, the problem that the tube bundles are locally hardened by scale accumulation is prevented, the
thermal resistance barrier caused by the scale layer is eliminated, the fluid flow at the groove position is optimized, compared with the traditional periodical cleaning, the application changes from passive cleaning to
active protection, the cleaning period is prolonged, and the maintenance frequency and cost are reduced.