A method for heating a concentrate (K) in a spray-drying system having a step (a): (a) increasing the pressure (P) of the concentrate (K), starting from a low-pressure level (p1) and a supply temperature (T1), to a high-pressure level (p2) which can reach a maximum of 350 bar, characterized by the sequence of the following steps (b) to (d): (b) high-pressure heating (H) of the concentrate (K) at the high-pressure level (p2) from the supply temperature (T1) to an elevated spraying temperature (T3), which lies in the range of 75 to 80°C, by means of a high-pressure heat exchanger which is supplied on the secondary side with a heat-transfer medium (W) and which is configured as a tube bundle heat exchanger having a plurality of inner tubes, through which the concentrate (K) flows in parallel, which are arranged in the form of a circular ring and on a single circle and which together form an inner channel which adjoins the inner tubes in the shape of a circumferential annular space in the flow direction, (c) defined shear loading (S) of the concentrate (K) in the course of or immediately after the treatment according to step (b) with means which consist of an annular-space-shaped outlet-side channel which is connected on the one side to the outlet of the circumferential annular space and on the other side to a second high-pressure line portion and which has a defined extension length and a defined length-dependent progression of its channel passage cross-sections, and (d) subsequently, immediate transfer (Ü) of the concentrate (K) treated according to step (c) to the location of its pressurized spraying (DZ), wherein a transfer time (Δt) for the immediate transfer (Ü) is determined by a minimum possible effective distance in terms of flow between the means for implementing the step (c) and the location of the pressurized spraying (DZ). (a) increasing the pressure (P) of the concentrate (K), starting from a low-pressure level (p1) and a supply temperature (T1), to a high-pressure level (p2) which can reach a maximum of 350 bar, (b) high-pressure heating (H) of the concentrate (K) at the high-pressure level (p2) from the supply temperature (T1) to an elevated spraying temperature (T3), which lies in the range of 75 to 80°C, by means of a high-pressure heat exchanger which is supplied on the secondary side with a heat-transfer medium (W) and which is configured as a tube bundle heat exchanger having a plurality of inner tubes, through which the concentrate (K) flows in parallel, which are arranged in the form of a circular ring and on a single circle and which together form an inner channel which adjoins the inner tubes in the shape of a circumferential annular space in the flow direction, (c) defined shear loading (S) of the concentrate (K) in the course of or immediately after the treatment according to step (b) with means which consist of an annular-space-shaped outlet-side channel which is connected on the one side to the outlet of the circumferential annular space and on the other side to a second high-pressure line portion and which has a defined extension length and a defined length-dependent progression of its channel passage cross-sections, and (d) subsequently, immediate transfer (Ü) of the concentrate (K) treated according to step (c) to the location of its pressurized spraying (DZ), wherein a transfer time (Δt) for the immediate transfer (Ü) is determined by a minimum possible effective distance in terms of flow between the means for implementing the step (c) and the location of the pressurized spraying (DZ). <EOS>