System and method for recovering drain water and steam of soot-blowing warming pipe

Abstract

The invention provides a system and a method for recovering drain water and steam of a soot-blowing warming pipe, and belongs to the technical field of recovery and utilization of soot blowing drain water of power plants. The system comprises a drain water box for collecting drain water and steam of the soot blowing warming pipe; a transmission system which is connected with the side of the drain water box and used for transmitting the drain water and steam of the soot-blowing warming pipe; a water spray desuperheater which is arranged on the upper end of the drain water box and connected with a condense water system by a connection pipeline; and a drain water pump which is connected with the lower part of the drain water box and used for pumping the cool water in the drain water box. The problem of the prior art that the drain water and the steam of the warming pipe before soot is blown, are directly discharged into the waste water tank or the outer environment and thus the energy is wasted is solved.

Description

technical field [0001] The invention relates to the technical field of recovery and utilization of soot blowing and drainage in power plants, in particular to a recovery system and method for soot blowing and heating pipe drainage and steam. Background technique [0002] At present, in power plants, in order to keep the heating surface of the boiler clean, reduce the loss of exhaust gas, prevent the overheating of the metal tube wall and coking in the furnace, and improve the efficiency of the boiler and the safety of the unit, soot blowing must be carried out on the heating surface of the boiler regularly. Before the soot blowing operation, it is generally necessary to warm the pipe first to prevent water hammer, and then put it into the soot blower for soot blowing. [0003] like figure 1 As shown, the drainage after sootblowing is generally discharged into the drainage tank 11, then flows into the water collection well 12 or flows to the condenser 14 through the drainage...

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Problems solved by technology

[0004] The embodiment of the present invention provides a recovery system and method for soot blowing and warming pipe drainage and steam to solve the problem that the current soot blowing and drainage recovery system only recovers the drainage after soot blowing, but does not recover the drainage of the heating pipe before soot blowing. Hydrophobic recycling, resulting in waste of energy

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