Steam soot blowing device, rotary air preheater and steam jet parameter design method

A steam soot blowing device, comprising:

• a steam sootblower;
• a first pipe communicating with the steam sootblower;
• and
• a group of nozzle assemblies communicating with the first pipe, each group of nozzle assemblies comprising a first nozzle assembly and a second nozzle assembly, wherein the first nozzle assembly comprises a throttle pipe with one end communicating with the first pipe, and a sprayer communicating with an other end of the throttle pipe, a throttle shrinkage hole is provided inside the throttle pipe, a diameter of the throttle shrinkage hole being smaller than a diameter of the throttle pipe, and a diameter of an inlet of the sprayer is smaller than a diameter of an outlet thereof;
• wherein the second nozzle assembly comprises a distribution pipe communicating with the first pipe and at least one nozzle communicating with the distribution pipe,
• wherein a steam jet velocity at the outlet of the sprayer is smaller than a steam jet velocity at an outlet of the at least one nozzle;
• wherein a block is arranged inside the throttle pipe, and the block is located downstream of the throttle shrinkage hole.

A steam soot blowing device, comprising:

• a steam sootblower;
• a first pipe communicating with the steam sootblower;
• and
• a group of nozzle assemblies communicating with the first pipe, each group of nozzle assemblies comprising a first nozzle assembly and a second nozzle assembly, wherein the first nozzle assembly comprises a throttle pipe with one end communicating with the first pipe, and a sprayer communicating with an other end of the throttle pipe, a throttle shrinkage hole is provided inside the throttle pipe, a diameter of the throttle shrinkage hole being smaller than a diameter of the throttle pipe, and a diameter of an inlet of the sprayer is smaller than a diameter of an outlet thereof;
• wherein the second nozzle assembly comprises a distribution pipe communicating with the first pipe and at least one nozzle communicating with the distribution pipe,
• wherein a steam jet velocity at the outlet of the sprayer is smaller than a steam jet velocity at an outlet of the at least one nozzle;
• wherein the sprayer comprises a conical cavity with a bottom communicating with the throttle pipe and a top surface covering a top of the conical cavity, and sprayer holes are opened on the top surface.