A temperature and pressure reduction device

Abstract

The invention relates to the field of supercritical unit heat supply reformation, in particular to a temperature reducing and pressure reducing device. The temperature reducing and pressure reducing device comprises a condensing steam turbine, a backwater heater and a pressure matcher. Intermediate pressure cylinder three-level extraction steam or high-pressure steam of the condensing steam turbine is conveyed to the backwater heater. Exhaust steam of the backwater heater and intermediate-low pressure cylinder communicating pipe extraction steam of the condensing steam turbine are conveyed to the pressure matcher through extraction steam pipelines. Exhaust steam of the pressure matcher is used for supplying heat to the outside. An outlet of a built-out steam cooler is connected to the pressure matcher through a valve pipeline. The temperature reducing and pressure reducing device has the beneficial effects that three-extraction steam usage quantity can be reduced effectively, and energy graded use efficiency is improved; the unit economy is improved; automatic temperature reducing and pressure reducing and industrial thermal load supply are achieved; and a temperature detector and an alertor can send temperature, pressure and alarm information to a monitoring center, remote monitoring is achieved, the production efficiency is improved, and the safety of equipment operation is ensured.

Description

technical field [0001] The invention relates to the field of heating transformation of super (super) critical units, in particular to a temperature and pressure reduction device. Background technique [0002] In order to meet the industrial heat load demand and environmental protection requirements, the heating transformation of units is increasing, which affects the safety and economy of units. [0003] At present, in practical engineering applications, the existing heating transformation methods are as follows: 1. Drilling holes from the pipes that meet the heating requirements to extract steam and then supply heat through the temperature and pressure reducer; Drill holes on the pipes and medium and low pressure connecting pipes to extract steam, and use a pressure matcher to inject steam from the reheating and cold sections into the connecting pipes to extract steam. After the two are mixed, the output meets the heating target. [0004] The external superheated steam coo...

AI Technical Summary

Problems solved by technology

[0006] The arrangement and application of the temperature reducer and pressure matcher in the heating system have a great impact on the operating economy of the unit. The existing technology has low energy cascade utilization efficiency and low thermal efficiency of the unit.

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