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Low-temperature and low-pressure steam production device in power station boiler and process method

A low-temperature, low-pressure, production device technology, applied in steam generation, steam superheating, boiler water pipes, etc., can solve the problems of increasing steam production cost, daily maintenance cost of power plant, uneconomical, and decreased energy quantity and quality.

Active Publication Date: 2020-06-26
XI AN JIAOTONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] In order to obtain a certain amount of low-temperature and low-pressure steam (1.3MPa saturated steam), the power plant can only build a new small-scale low-pressure steam boiler that meets the actual engineering needs in order not to affect the normal operation of the active 330MW subcritical boiler unit, which will undoubtedly increase the cost of steam production and daily maintenance costs of the plant
If the main steam is used to directly reduce the pressure and temperature, it will cause a decline in energy quantity and quality, which is neither energy-saving nor economical; and it will affect the main steam flow of the existing unit, seriously affecting the operation of the existing boiler steam-water system

Method used

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  • Low-temperature and low-pressure steam production device in power station boiler and process method
  • Low-temperature and low-pressure steam production device in power station boiler and process method
  • Low-temperature and low-pressure steam production device in power station boiler and process method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0200] When external steam supply is required, select the water intake point according to the required low-temperature and low-pressure steam parameters. If the required low-temperature and low-pressure steam is high, select the pipeline between the feed water pump and the third high-pressure heater as the water intake point; otherwise, select the feed water pump The pipeline between the deaerator and the deaerator takes water. At this time, an additional low-pressure feed water pump needs to be installed to increase the feed water pressure by 1.0-5.0MPa to overcome the pressure loss in the pipeline. In this case, 100t / h of 1.3MPa saturated steam needs to be supplied externally, so water is taken from the pipeline between the feedwater pump and the deaerator, and a low-pressure feedwater pump is installed to increase the feedwater pressure to obtain a saturated steam with a pressure of 0.79104MPa and a temperature of 443.1K Water, adjust the flow of low-pressure feed water pump...

Embodiment 2

[0202]When external steam supply is not required, the water intake point can be selected between the feed water pump and the third high-pressure heater. The feed water heating process is similar to Case 1. After the superheated steam enters the external steam supply mixing station, it passes through the pressure reducing valve and spray water Reduce the temperature to the appropriate pressure and temperature parameters, produce 5.945MPa, 386.7 ℃ superheated steam can be passed into the first high-pressure heater, or the steam with corresponding parameters can be passed into the second low-pressure heater, or the first high-pressure heater, the second high-pressure heater The heater and the third high-pressure heater replace or partially replace the steam extraction from the high and low pressure cylinders of the steam turbine.

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Abstract

The invention discloses a low-temperature and low-pressure steam production device in a power station boiler and a process method. The low-temperature and low-pressure steam production device comprises a wall type steam generator, a steam header and an external supply steam mixing station; the wall type steam generator is arranged between SOFA air of a low NO<x> burner and a platen superheater ina boiler furnace; the wall type steam generator is provided with an introduction pipe which is used for introducing make-up water; the wall type steam generator communicates with the steam header through a lead-out pipe; and the steam header communicates with the external supply steam mixing station through a superheated steam pipeline, and the external supply steam mixing station is used for achieving external supply of steam. According to the the process method and the low-temperature and low-pressure steam production device in the power station boiler, the required low-temperature and low-pressure steam can be produced under the condition that the main steam quantity and the steam-water circulation system of a unit are not influenced.

Description

technical field [0001] The invention belongs to the technical field of practical engineering application of power plant boiler units, and in particular relates to a low-temperature and low-pressure steam production device and a process method in a power plant boiler furnace. Background technique [0002] In order to obtain a certain amount of low-temperature and low-pressure steam (1.3MPa saturated steam), the power plant can only build a new small-scale low-pressure steam boiler that meets the actual engineering needs in order not to affect the normal operation of the active 330MW subcritical boiler unit, which will undoubtedly increase the cost of steam production and power plant maintenance costs. If the main steam is used to directly depressurize and reduce temperature, it will cause a decline in energy quantity and quality, which is neither energy-saving nor economical; and it will affect the main steam flow of the existing unit, seriously affecting the operation of the...

Claims

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Application Information

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IPC IPC(8): F22B37/10F22B37/22F22D1/50F22D11/02F22G5/12F22B35/18
CPCF22B35/18F22B37/10F22B37/22F22D1/50F22D11/02F22G5/12
Inventor 谭厚章于世林王毅斌邓双辉
Owner XI AN JIAOTONG UNIV
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